17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 545916cd2Sjpk * Common Development and Distribution License (the "License"). 645916cd2Sjpk * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217c478bd9Sstevel@tonic-gate /* 2245916cd2Sjpk * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 237c478bd9Sstevel@tonic-gate * Use is subject to license terms. 247c478bd9Sstevel@tonic-gate */ 257c478bd9Sstevel@tonic-gate /* Copyright (c) 1990 Mentat Inc. */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate 307c478bd9Sstevel@tonic-gate /* 317c478bd9Sstevel@tonic-gate * This file contains routines that manipulate Internet Routing Entries (IREs). 327c478bd9Sstevel@tonic-gate */ 337c478bd9Sstevel@tonic-gate 347c478bd9Sstevel@tonic-gate #include <sys/types.h> 357c478bd9Sstevel@tonic-gate #include <sys/stream.h> 367c478bd9Sstevel@tonic-gate #include <sys/stropts.h> 3745916cd2Sjpk #include <sys/strsun.h> 387c478bd9Sstevel@tonic-gate #include <sys/ddi.h> 397c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h> 407c478bd9Sstevel@tonic-gate #include <sys/policy.h> 417c478bd9Sstevel@tonic-gate 427c478bd9Sstevel@tonic-gate #include <sys/systm.h> 437c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 447c478bd9Sstevel@tonic-gate #include <sys/param.h> 457c478bd9Sstevel@tonic-gate #include <sys/socket.h> 467c478bd9Sstevel@tonic-gate #include <net/if.h> 477c478bd9Sstevel@tonic-gate #include <net/route.h> 487c478bd9Sstevel@tonic-gate #include <netinet/in.h> 497c478bd9Sstevel@tonic-gate #include <net/if_dl.h> 507c478bd9Sstevel@tonic-gate #include <netinet/ip6.h> 517c478bd9Sstevel@tonic-gate #include <netinet/icmp6.h> 527c478bd9Sstevel@tonic-gate 537c478bd9Sstevel@tonic-gate #include <inet/common.h> 547c478bd9Sstevel@tonic-gate #include <inet/mi.h> 557c478bd9Sstevel@tonic-gate #include <inet/ip.h> 567c478bd9Sstevel@tonic-gate #include <inet/ip6.h> 577c478bd9Sstevel@tonic-gate #include <inet/ip_ndp.h> 58c793af95Ssangeeta #include <inet/arp.h> 597c478bd9Sstevel@tonic-gate #include <inet/ip_if.h> 607c478bd9Sstevel@tonic-gate #include <inet/ip_ire.h> 61c793af95Ssangeeta #include <inet/ip_ftable.h> 627c478bd9Sstevel@tonic-gate #include <inet/ip_rts.h> 637c478bd9Sstevel@tonic-gate #include <inet/nd.h> 647c478bd9Sstevel@tonic-gate 657c478bd9Sstevel@tonic-gate #include <net/pfkeyv2.h> 667c478bd9Sstevel@tonic-gate #include <inet/ipsec_info.h> 677c478bd9Sstevel@tonic-gate #include <inet/sadb.h> 687c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 697c478bd9Sstevel@tonic-gate #include <inet/tcp.h> 707c478bd9Sstevel@tonic-gate #include <inet/ipclassifier.h> 717c478bd9Sstevel@tonic-gate #include <sys/zone.h> 7245916cd2Sjpk #include <sys/tsol/label.h> 7345916cd2Sjpk #include <sys/tsol/tnet.h> 7445916cd2Sjpk 75c793af95Ssangeeta struct kmem_cache *rt_entry_cache; 76c793af95Ssangeeta 77c793af95Ssangeeta 787c478bd9Sstevel@tonic-gate /* 797c478bd9Sstevel@tonic-gate * Synchronization notes: 807c478bd9Sstevel@tonic-gate * 817c478bd9Sstevel@tonic-gate * The fields of the ire_t struct are protected in the following way : 827c478bd9Sstevel@tonic-gate * 837c478bd9Sstevel@tonic-gate * ire_next/ire_ptpn 847c478bd9Sstevel@tonic-gate * 857c478bd9Sstevel@tonic-gate * - bucket lock of the respective tables (cache or forwarding tables). 867c478bd9Sstevel@tonic-gate * 877c478bd9Sstevel@tonic-gate * ire_mp, ire_rfq, ire_stq, ire_u *except* ire_gateway_addr[v6], ire_mask, 887c478bd9Sstevel@tonic-gate * ire_type, ire_create_time, ire_masklen, ire_ipversion, ire_flags, ire_ipif, 897c478bd9Sstevel@tonic-gate * ire_ihandle, ire_phandle, ire_nce, ire_bucket, ire_in_ill, ire_in_src_addr 907c478bd9Sstevel@tonic-gate * 917c478bd9Sstevel@tonic-gate * - Set in ire_create_v4/v6 and never changes after that. Thus, 927c478bd9Sstevel@tonic-gate * we don't need a lock whenever these fields are accessed. 937c478bd9Sstevel@tonic-gate * 947c478bd9Sstevel@tonic-gate * - ire_bucket and ire_masklen (also set in ire_create) is set in 957c478bd9Sstevel@tonic-gate * ire_add_v4/ire_add_v6 before inserting in the bucket and never 967c478bd9Sstevel@tonic-gate * changes after that. Thus we don't need a lock whenever these 977c478bd9Sstevel@tonic-gate * fields are accessed. 987c478bd9Sstevel@tonic-gate * 997c478bd9Sstevel@tonic-gate * ire_gateway_addr_v4[v6] 1007c478bd9Sstevel@tonic-gate * 1017c478bd9Sstevel@tonic-gate * - ire_gateway_addr_v4[v6] is set during ire_create and later modified 1027c478bd9Sstevel@tonic-gate * by rts_setgwr[v6]. As ire_gateway_addr is a uint32_t, updates to 1037c478bd9Sstevel@tonic-gate * it assumed to be atomic and hence the other parts of the code 1047c478bd9Sstevel@tonic-gate * does not use any locks. ire_gateway_addr_v6 updates are not atomic 1057c478bd9Sstevel@tonic-gate * and hence any access to it uses ire_lock to get/set the right value. 1067c478bd9Sstevel@tonic-gate * 1077c478bd9Sstevel@tonic-gate * ire_ident, ire_refcnt 1087c478bd9Sstevel@tonic-gate * 1097c478bd9Sstevel@tonic-gate * - Updated atomically using atomic_add_32 1107c478bd9Sstevel@tonic-gate * 1117c478bd9Sstevel@tonic-gate * ire_ssthresh, ire_rtt_sd, ire_rtt, ire_ib_pkt_count, ire_ob_pkt_count 1127c478bd9Sstevel@tonic-gate * 1137c478bd9Sstevel@tonic-gate * - Assumes that 32 bit writes are atomic. No locks. ire_lock is 1147c478bd9Sstevel@tonic-gate * used to serialize updates to ire_ssthresh, ire_rtt_sd, ire_rtt. 1157c478bd9Sstevel@tonic-gate * 1167c478bd9Sstevel@tonic-gate * ire_max_frag, ire_frag_flag 1177c478bd9Sstevel@tonic-gate * 1187c478bd9Sstevel@tonic-gate * - ire_lock is used to set/read both of them together. 1197c478bd9Sstevel@tonic-gate * 1207c478bd9Sstevel@tonic-gate * ire_tire_mark 1217c478bd9Sstevel@tonic-gate * 1227c478bd9Sstevel@tonic-gate * - Set in ire_create and updated in ire_expire, which is called 1237c478bd9Sstevel@tonic-gate * by only one function namely ip_trash_timer_expire. Thus only 1247c478bd9Sstevel@tonic-gate * one function updates and examines the value. 1257c478bd9Sstevel@tonic-gate * 1267c478bd9Sstevel@tonic-gate * ire_marks 1277c478bd9Sstevel@tonic-gate * - bucket lock protects this. 1287c478bd9Sstevel@tonic-gate * 1297c478bd9Sstevel@tonic-gate * ire_ipsec_overhead/ire_ll_hdr_length 1307c478bd9Sstevel@tonic-gate * 1317c478bd9Sstevel@tonic-gate * - Place holder for returning the information to the upper layers 1327c478bd9Sstevel@tonic-gate * when IRE_DB_REQ comes down. 1337c478bd9Sstevel@tonic-gate * 1347c478bd9Sstevel@tonic-gate * 1357c478bd9Sstevel@tonic-gate * ipv6_ire_default_count is protected by the bucket lock of 1367c478bd9Sstevel@tonic-gate * ip_forwarding_table_v6[0][0]. 1377c478bd9Sstevel@tonic-gate * 138c793af95Ssangeeta * ipv6_ire_default_index is not protected as it is just a hint 139c793af95Ssangeeta * at which default gateway to use. There is nothing 1407c478bd9Sstevel@tonic-gate * wrong in using the same gateway for two different connections. 1417c478bd9Sstevel@tonic-gate * 1427c478bd9Sstevel@tonic-gate * As we always hold the bucket locks in all the places while accessing 1437c478bd9Sstevel@tonic-gate * the above values, it is natural to use them for protecting them. 1447c478bd9Sstevel@tonic-gate * 1457c478bd9Sstevel@tonic-gate * We have a separate cache table and forwarding table for IPv4 and IPv6. 1467c478bd9Sstevel@tonic-gate * Cache table (ip_cache_table/ip_cache_table_v6) is a pointer to an 1477c478bd9Sstevel@tonic-gate * array of irb_t structure and forwarding table (ip_forwarding_table/ 1487c478bd9Sstevel@tonic-gate * ip_forwarding_table_v6) is an array of pointers to array of irb_t 1497c478bd9Sstevel@tonic-gate * structure. ip_forwarding_table[_v6] is allocated dynamically in 1507c478bd9Sstevel@tonic-gate * ire_add_v4/v6. ire_ft_init_lock is used to serialize multiple threads 1517c478bd9Sstevel@tonic-gate * initializing the same bucket. Once a bucket is initialized, it is never 1527c478bd9Sstevel@tonic-gate * de-alloacted. This assumption enables us to access ip_forwarding_table[i] 1537c478bd9Sstevel@tonic-gate * or ip_forwarding_table_v6[i] without any locks. 1547c478bd9Sstevel@tonic-gate * 1557c478bd9Sstevel@tonic-gate * Each irb_t - ire bucket structure has a lock to protect 1567c478bd9Sstevel@tonic-gate * a bucket and the ires residing in the bucket have a back pointer to 1577c478bd9Sstevel@tonic-gate * the bucket structure. It also has a reference count for the number 1587c478bd9Sstevel@tonic-gate * of threads walking the bucket - irb_refcnt which is bumped up 1597c478bd9Sstevel@tonic-gate * using the macro IRB_REFHOLD macro. The flags irb_flags can be 1607c478bd9Sstevel@tonic-gate * set to IRE_MARK_CONDEMNED indicating that there are some ires 1617c478bd9Sstevel@tonic-gate * in this bucket that are marked with IRE_MARK_CONDEMNED and the 1627c478bd9Sstevel@tonic-gate * last thread to leave the bucket should delete the ires. Usually 1637c478bd9Sstevel@tonic-gate * this is done by the IRB_REFRELE macro which is used to decrement 1647c478bd9Sstevel@tonic-gate * the reference count on a bucket. 1657c478bd9Sstevel@tonic-gate * 1667c478bd9Sstevel@tonic-gate * IRE_REFHOLD/IRE_REFRELE macros operate on the ire which increments/ 1677c478bd9Sstevel@tonic-gate * decrements the reference count, ire_refcnt, atomically on the ire. 1687c478bd9Sstevel@tonic-gate * ire_refcnt is modified only using this macro. Operations on the IRE 1697c478bd9Sstevel@tonic-gate * could be described as follows : 1707c478bd9Sstevel@tonic-gate * 1717c478bd9Sstevel@tonic-gate * CREATE an ire with reference count initialized to 1. 1727c478bd9Sstevel@tonic-gate * 1737c478bd9Sstevel@tonic-gate * ADDITION of an ire holds the bucket lock, checks for duplicates 1747c478bd9Sstevel@tonic-gate * and then adds the ire. ire_add_v4/ire_add_v6 returns the ire after 1757c478bd9Sstevel@tonic-gate * bumping up once more i.e the reference count is 2. This is to avoid 1767c478bd9Sstevel@tonic-gate * an extra lookup in the functions calling ire_add which wants to 1777c478bd9Sstevel@tonic-gate * work with the ire after adding. 1787c478bd9Sstevel@tonic-gate * 1797c478bd9Sstevel@tonic-gate * LOOKUP of an ire bumps up the reference count using IRE_REFHOLD 1807c478bd9Sstevel@tonic-gate * macro. It is valid to bump up the referece count of the IRE, 1817c478bd9Sstevel@tonic-gate * after the lookup has returned an ire. Following are the lookup 1827c478bd9Sstevel@tonic-gate * functions that return an HELD ire : 1837c478bd9Sstevel@tonic-gate * 1847c478bd9Sstevel@tonic-gate * ire_lookup_local[_v6], ire_ctable_lookup[_v6], ire_ftable_lookup[_v6], 1857c478bd9Sstevel@tonic-gate * ire_cache_lookup[_v6], ire_lookup_multi[_v6], ire_route_lookup[_v6], 1867c478bd9Sstevel@tonic-gate * ipif_to_ire[_v6], ire_mrtun_lookup, ire_srcif_table_lookup. 1877c478bd9Sstevel@tonic-gate * 1887c478bd9Sstevel@tonic-gate * DELETION of an ire holds the bucket lock, removes it from the list 1897c478bd9Sstevel@tonic-gate * and then decrements the reference count for having removed from the list 1907c478bd9Sstevel@tonic-gate * by using the IRE_REFRELE macro. If some other thread has looked up 1917c478bd9Sstevel@tonic-gate * the ire, the reference count would have been bumped up and hence 1927c478bd9Sstevel@tonic-gate * this ire will not be freed once deleted. It will be freed once the 1937c478bd9Sstevel@tonic-gate * reference count drops to zero. 1947c478bd9Sstevel@tonic-gate * 1957c478bd9Sstevel@tonic-gate * Add and Delete acquires the bucket lock as RW_WRITER, while all the 1967c478bd9Sstevel@tonic-gate * lookups acquire the bucket lock as RW_READER. 1977c478bd9Sstevel@tonic-gate * 1987c478bd9Sstevel@tonic-gate * NOTE : The only functions that does the IRE_REFRELE when an ire is 1997c478bd9Sstevel@tonic-gate * passed as an argument are : 2007c478bd9Sstevel@tonic-gate * 2017c478bd9Sstevel@tonic-gate * 1) ip_wput_ire : This is because it IRE_REFHOLD/RELEs the 2027c478bd9Sstevel@tonic-gate * broadcast ires it looks up internally within 2037c478bd9Sstevel@tonic-gate * the function. Currently, for simplicity it does 2047c478bd9Sstevel@tonic-gate * not differentiate the one that is passed in and 2057c478bd9Sstevel@tonic-gate * the ones it looks up internally. It always 2067c478bd9Sstevel@tonic-gate * IRE_REFRELEs. 2077c478bd9Sstevel@tonic-gate * 2) ire_send 2087c478bd9Sstevel@tonic-gate * ire_send_v6 : As ire_send calls ip_wput_ire and other functions 2097c478bd9Sstevel@tonic-gate * that take ire as an argument, it has to selectively 2107c478bd9Sstevel@tonic-gate * IRE_REFRELE the ire. To maintain symmetry, 2117c478bd9Sstevel@tonic-gate * ire_send_v6 does the same. 2127c478bd9Sstevel@tonic-gate * 2137c478bd9Sstevel@tonic-gate * Otherwise, the general rule is to do the IRE_REFRELE in the function 2147c478bd9Sstevel@tonic-gate * that is passing the ire as an argument. 2157c478bd9Sstevel@tonic-gate * 2167c478bd9Sstevel@tonic-gate * In trying to locate ires the following points are to be noted. 2177c478bd9Sstevel@tonic-gate * 2187c478bd9Sstevel@tonic-gate * IRE_MARK_CONDEMNED signifies that the ire has been logically deleted and is 2197c478bd9Sstevel@tonic-gate * to be ignored when walking the ires using ire_next. 2207c478bd9Sstevel@tonic-gate * 2217c478bd9Sstevel@tonic-gate * IRE_MARK_HIDDEN signifies that the ire is a special ire typically for the 2227c478bd9Sstevel@tonic-gate * benefit of in.mpathd which needs to probe interfaces for failures. Normal 2237c478bd9Sstevel@tonic-gate * applications should not be seeing this ire and hence this ire is ignored 2247c478bd9Sstevel@tonic-gate * in most cases in the search using ire_next. 2257c478bd9Sstevel@tonic-gate * 2267c478bd9Sstevel@tonic-gate * Zones note: 2277c478bd9Sstevel@tonic-gate * Walking IREs within a given zone also walks certain ires in other 2287c478bd9Sstevel@tonic-gate * zones. This is done intentionally. IRE walks with a specified 2297c478bd9Sstevel@tonic-gate * zoneid are used only when doing informational reports, and 2307c478bd9Sstevel@tonic-gate * zone users want to see things that they can access. See block 2317c478bd9Sstevel@tonic-gate * comment in ire_walk_ill_match(). 2327c478bd9Sstevel@tonic-gate */ 2337c478bd9Sstevel@tonic-gate 2347c478bd9Sstevel@tonic-gate /* This is dynamically allocated in ip_ire_init */ 235c793af95Ssangeeta irb_t *ip_cache_table; 2367c478bd9Sstevel@tonic-gate /* This is dynamically allocated in ire_add_mrtun */ 2377c478bd9Sstevel@tonic-gate irb_t *ip_mrtun_table; 2387c478bd9Sstevel@tonic-gate 2397c478bd9Sstevel@tonic-gate uint32_t ire_handle = 1; 2407c478bd9Sstevel@tonic-gate /* 2417c478bd9Sstevel@tonic-gate * ire_ft_init_lock is used while initializing ip_forwarding_table 2427c478bd9Sstevel@tonic-gate * dynamically in ire_add. 2437c478bd9Sstevel@tonic-gate */ 2447c478bd9Sstevel@tonic-gate kmutex_t ire_ft_init_lock; 2457c478bd9Sstevel@tonic-gate kmutex_t ire_mrtun_lock; /* Protects creation of table and it's count */ 2467c478bd9Sstevel@tonic-gate kmutex_t ire_srcif_table_lock; /* Same as above */ 2477c478bd9Sstevel@tonic-gate /* 2487c478bd9Sstevel@tonic-gate * The following counts are used to determine whether a walk is 2497c478bd9Sstevel@tonic-gate * needed through the reverse tunnel table or through ills 2507c478bd9Sstevel@tonic-gate */ 2517c478bd9Sstevel@tonic-gate kmutex_t ire_handle_lock; /* Protects ire_handle */ 2527c478bd9Sstevel@tonic-gate uint_t ire_mrtun_count; /* Number of ires in reverse tun table */ 2537c478bd9Sstevel@tonic-gate 2547c478bd9Sstevel@tonic-gate /* 2557c478bd9Sstevel@tonic-gate * A per-interface routing table is created ( if not present) 2567c478bd9Sstevel@tonic-gate * when the first entry is added to this special routing table. 2577c478bd9Sstevel@tonic-gate * This special routing table is accessed through the ill data structure. 2587c478bd9Sstevel@tonic-gate * The routing table looks like cache table. For example, currently it 2597c478bd9Sstevel@tonic-gate * is used by mobile-ip foreign agent to forward data that only comes from 2607c478bd9Sstevel@tonic-gate * the home agent tunnel for a mobile node. Thus if the outgoing interface 2617c478bd9Sstevel@tonic-gate * is a RESOLVER interface, IP may need to resolve the hardware address for 2627c478bd9Sstevel@tonic-gate * the outgoing interface. The routing entries in this table are not updated 2637c478bd9Sstevel@tonic-gate * in IRE_CACHE. When MCTL msg comes back from ARP, the incoming ill informa- 2647c478bd9Sstevel@tonic-gate * tion is lost as the write queue is passed to ip_wput. 2657c478bd9Sstevel@tonic-gate * But, before sending the packet out, the hardware information must be updated 2667c478bd9Sstevel@tonic-gate * in the special forwarding table. ire_srcif_table_count keeps track of total 2677c478bd9Sstevel@tonic-gate * number of ires that are in interface based tables. Each interface based 2687c478bd9Sstevel@tonic-gate * table hangs off of the incoming ill and each ill_t also keeps a refcnt 2697c478bd9Sstevel@tonic-gate * of ires in that table. 2707c478bd9Sstevel@tonic-gate */ 2717c478bd9Sstevel@tonic-gate 2727c478bd9Sstevel@tonic-gate uint_t ire_srcif_table_count; /* Number of ires in all srcif tables */ 2737c478bd9Sstevel@tonic-gate 2747c478bd9Sstevel@tonic-gate /* 2757c478bd9Sstevel@tonic-gate * The minimum size of IRE cache table. It will be recalcuated in 2767c478bd9Sstevel@tonic-gate * ip_ire_init(). 2777c478bd9Sstevel@tonic-gate */ 2787c478bd9Sstevel@tonic-gate uint32_t ip_cache_table_size = IP_CACHE_TABLE_SIZE; 2797c478bd9Sstevel@tonic-gate uint32_t ip6_cache_table_size = IP6_CACHE_TABLE_SIZE; 2807c478bd9Sstevel@tonic-gate 2817c478bd9Sstevel@tonic-gate /* 2827c478bd9Sstevel@tonic-gate * The size of the forwarding table. We will make sure that it is a 2837c478bd9Sstevel@tonic-gate * power of 2 in ip_ire_init(). 2847c478bd9Sstevel@tonic-gate */ 2857c478bd9Sstevel@tonic-gate uint32_t ip6_ftable_hash_size = IP6_FTABLE_HASH_SIZE; 2867c478bd9Sstevel@tonic-gate 2877c478bd9Sstevel@tonic-gate struct kmem_cache *ire_cache; 2887c478bd9Sstevel@tonic-gate static ire_t ire_null; 2897c478bd9Sstevel@tonic-gate 2907c478bd9Sstevel@tonic-gate ire_stats_t ire_stats_v4; /* IPv4 ire statistics */ 2917c478bd9Sstevel@tonic-gate ire_stats_t ire_stats_v6; /* IPv6 ire statistics */ 2927c478bd9Sstevel@tonic-gate 2937c478bd9Sstevel@tonic-gate /* 2947c478bd9Sstevel@tonic-gate * The threshold number of IRE in a bucket when the IREs are 2957c478bd9Sstevel@tonic-gate * cleaned up. This threshold is calculated later in ip_open() 2967c478bd9Sstevel@tonic-gate * based on the speed of CPU and available memory. This default 2977c478bd9Sstevel@tonic-gate * value is the maximum. 2987c478bd9Sstevel@tonic-gate * 2997c478bd9Sstevel@tonic-gate * We have two kinds of cached IRE, temporary and 3007c478bd9Sstevel@tonic-gate * non-temporary. Temporary IREs are marked with 3017c478bd9Sstevel@tonic-gate * IRE_MARK_TEMPORARY. They are IREs created for non 3027c478bd9Sstevel@tonic-gate * TCP traffic and for forwarding purposes. All others 3037c478bd9Sstevel@tonic-gate * are non-temporary IREs. We don't mark IRE created for 3047c478bd9Sstevel@tonic-gate * TCP as temporary because TCP is stateful and there are 3057c478bd9Sstevel@tonic-gate * info stored in the IRE which can be shared by other TCP 3067c478bd9Sstevel@tonic-gate * connections to the same destination. For connected 3077c478bd9Sstevel@tonic-gate * endpoint, we also don't want to mark the IRE used as 3087c478bd9Sstevel@tonic-gate * temporary because the same IRE will be used frequently, 3097c478bd9Sstevel@tonic-gate * otherwise, the app should not do a connect(). We change 3107c478bd9Sstevel@tonic-gate * the marking at ip_bind_connected_*() if necessary. 3117c478bd9Sstevel@tonic-gate * 3127c478bd9Sstevel@tonic-gate * We want to keep the cache IRE hash bucket length reasonably 3137c478bd9Sstevel@tonic-gate * short, otherwise IRE lookup functions will take "forever." 3147c478bd9Sstevel@tonic-gate * We use the "crude" function that the IRE bucket 3157c478bd9Sstevel@tonic-gate * length should be based on the CPU speed, which is 1 entry 3167c478bd9Sstevel@tonic-gate * per x MHz, depending on the shift factor ip_ire_cpu_ratio 3177c478bd9Sstevel@tonic-gate * (n). This means that with a 750MHz CPU, the max bucket 3187c478bd9Sstevel@tonic-gate * length can be (750 >> n) entries. 3197c478bd9Sstevel@tonic-gate * 3207c478bd9Sstevel@tonic-gate * Note that this threshold is separate for temp and non-temp 3217c478bd9Sstevel@tonic-gate * IREs. This means that the actual bucket length can be 3227c478bd9Sstevel@tonic-gate * twice as that. And while we try to keep temporary IRE 3237c478bd9Sstevel@tonic-gate * length at most at the threshold value, we do not attempt to 3247c478bd9Sstevel@tonic-gate * make the length for non-temporary IREs fixed, for the 3257c478bd9Sstevel@tonic-gate * reason stated above. Instead, we start trying to find 3267c478bd9Sstevel@tonic-gate * "unused" non-temporary IREs when the bucket length reaches 3277c478bd9Sstevel@tonic-gate * this threshold and clean them up. 3287c478bd9Sstevel@tonic-gate * 3297c478bd9Sstevel@tonic-gate * We also want to limit the amount of memory used by 3307c478bd9Sstevel@tonic-gate * IREs. So if we are allowed to use ~3% of memory (M) 3317c478bd9Sstevel@tonic-gate * for those IREs, each bucket should not have more than 3327c478bd9Sstevel@tonic-gate * 3337c478bd9Sstevel@tonic-gate * M / num of cache bucket / sizeof (ire_t) 3347c478bd9Sstevel@tonic-gate * 3357c478bd9Sstevel@tonic-gate * Again the above memory uses are separate for temp and 3367c478bd9Sstevel@tonic-gate * non-temp cached IREs. 3377c478bd9Sstevel@tonic-gate * 3387c478bd9Sstevel@tonic-gate * We may also want the limit to be a function of the number 3397c478bd9Sstevel@tonic-gate * of interfaces and number of CPUs. Doing the initialization 3407c478bd9Sstevel@tonic-gate * in ip_open() means that every time an interface is plumbed, 3417c478bd9Sstevel@tonic-gate * the max is re-calculated. Right now, we don't do anything 3427c478bd9Sstevel@tonic-gate * different. In future, when we have more experience, we 3437c478bd9Sstevel@tonic-gate * may want to change this behavior. 3447c478bd9Sstevel@tonic-gate */ 3457c478bd9Sstevel@tonic-gate uint32_t ip_ire_max_bucket_cnt = 10; 3467c478bd9Sstevel@tonic-gate uint32_t ip6_ire_max_bucket_cnt = 10; 3477c478bd9Sstevel@tonic-gate 3487c478bd9Sstevel@tonic-gate /* 3497c478bd9Sstevel@tonic-gate * The minimum of the temporary IRE bucket count. We do not want 3507c478bd9Sstevel@tonic-gate * the length of each bucket to be too short. This may hurt 3517c478bd9Sstevel@tonic-gate * performance of some apps as the temporary IREs are removed too 3527c478bd9Sstevel@tonic-gate * often. 3537c478bd9Sstevel@tonic-gate */ 3547c478bd9Sstevel@tonic-gate uint32_t ip_ire_min_bucket_cnt = 3; 3557c478bd9Sstevel@tonic-gate uint32_t ip6_ire_min_bucket_cnt = 3; 3567c478bd9Sstevel@tonic-gate 3577c478bd9Sstevel@tonic-gate /* 3587c478bd9Sstevel@tonic-gate * The ratio of memory consumed by IRE used for temporary to available 3597c478bd9Sstevel@tonic-gate * memory. This is a shift factor, so 6 means the ratio 1 to 64. This 3607c478bd9Sstevel@tonic-gate * value can be changed in /etc/system. 6 is a reasonable number. 3617c478bd9Sstevel@tonic-gate */ 3627c478bd9Sstevel@tonic-gate uint32_t ip_ire_mem_ratio = 6; 3637c478bd9Sstevel@tonic-gate /* The shift factor for CPU speed to calculate the max IRE bucket length. */ 3647c478bd9Sstevel@tonic-gate uint32_t ip_ire_cpu_ratio = 7; 3657c478bd9Sstevel@tonic-gate 366c793af95Ssangeeta typedef struct nce_clookup_s { 367c793af95Ssangeeta ipaddr_t ncecl_addr; 368c793af95Ssangeeta boolean_t ncecl_found; 369c793af95Ssangeeta } nce_clookup_t; 370c793af95Ssangeeta 3717c478bd9Sstevel@tonic-gate /* 3727c478bd9Sstevel@tonic-gate * The maximum number of buckets in IRE cache table. In future, we may 3737c478bd9Sstevel@tonic-gate * want to make it a dynamic hash table. For the moment, we fix the 3747c478bd9Sstevel@tonic-gate * size and allocate the table in ip_ire_init() when IP is first loaded. 3757c478bd9Sstevel@tonic-gate * We take into account the amount of memory a system has. 3767c478bd9Sstevel@tonic-gate */ 3777c478bd9Sstevel@tonic-gate #define IP_MAX_CACHE_TABLE_SIZE 4096 3787c478bd9Sstevel@tonic-gate 3797c478bd9Sstevel@tonic-gate static uint32_t ip_max_cache_table_size = IP_MAX_CACHE_TABLE_SIZE; 3807c478bd9Sstevel@tonic-gate static uint32_t ip6_max_cache_table_size = IP_MAX_CACHE_TABLE_SIZE; 3817c478bd9Sstevel@tonic-gate 3827c478bd9Sstevel@tonic-gate #define NUM_ILLS 3 /* To build the ILL list to unlock */ 3837c478bd9Sstevel@tonic-gate 3847c478bd9Sstevel@tonic-gate /* Zero iulp_t for initialization. */ 3857c478bd9Sstevel@tonic-gate const iulp_t ire_uinfo_null = { 0 }; 3867c478bd9Sstevel@tonic-gate 3877c478bd9Sstevel@tonic-gate static int ire_add_v4(ire_t **ire_p, queue_t *q, mblk_t *mp, 388c793af95Ssangeeta ipsq_func_t func, boolean_t); 3897c478bd9Sstevel@tonic-gate static int ire_add_srcif_v4(ire_t **ire_p, queue_t *q, mblk_t *mp, 3907c478bd9Sstevel@tonic-gate ipsq_func_t func); 3917c478bd9Sstevel@tonic-gate static ire_t *ire_update_srcif_v4(ire_t *ire); 3927c478bd9Sstevel@tonic-gate static void ire_delete_v4(ire_t *ire); 3937c478bd9Sstevel@tonic-gate static void ire_report_ctable(ire_t *ire, char *mp); 3947c478bd9Sstevel@tonic-gate static void ire_report_mrtun_table(ire_t *ire, char *mp); 3957c478bd9Sstevel@tonic-gate static void ire_report_srcif_table(ire_t *ire, char *mp); 39645916cd2Sjpk static void ire_walk_ipvers(pfv_t func, void *arg, uchar_t vers, 3977c478bd9Sstevel@tonic-gate zoneid_t zoneid); 3987c478bd9Sstevel@tonic-gate static void ire_walk_ill_ipvers(uint_t match_flags, uint_t ire_type, 39945916cd2Sjpk pfv_t func, void *arg, uchar_t vers, ill_t *ill); 4007c478bd9Sstevel@tonic-gate static void ire_cache_cleanup(irb_t *irb, uint32_t threshold, int cnt); 4017c478bd9Sstevel@tonic-gate extern void ill_unlock_ills(ill_t **list, int cnt); 4027c478bd9Sstevel@tonic-gate static void ire_fastpath_list_add(ill_t *ill, ire_t *ire); 403c793af95Ssangeeta static void ip_nce_clookup_and_delete(nce_t *nce, void *arg); 4047c478bd9Sstevel@tonic-gate extern void th_trace_rrecord(th_trace_t *); 4057c478bd9Sstevel@tonic-gate #ifdef IRE_DEBUG 4067c478bd9Sstevel@tonic-gate static void ire_trace_inactive(ire_t *); 4077c478bd9Sstevel@tonic-gate #endif 4087c478bd9Sstevel@tonic-gate 4097c478bd9Sstevel@tonic-gate /* 4107c478bd9Sstevel@tonic-gate * To avoid bloating the code, we call this function instead of 4117c478bd9Sstevel@tonic-gate * using the macro IRE_REFRELE. Use macro only in performance 4127c478bd9Sstevel@tonic-gate * critical paths. 4137c478bd9Sstevel@tonic-gate * 4147c478bd9Sstevel@tonic-gate * Must not be called while holding any locks. Otherwise if this is 4157c478bd9Sstevel@tonic-gate * the last reference to be released there is a chance of recursive mutex 4167c478bd9Sstevel@tonic-gate * panic due to ire_refrele -> ipif_ill_refrele_tail -> qwriter_ip trying 4177c478bd9Sstevel@tonic-gate * to restart an ioctl. The one exception is when the caller is sure that 4187c478bd9Sstevel@tonic-gate * this is not the last reference to be released. Eg. if the caller is 4197c478bd9Sstevel@tonic-gate * sure that the ire has not been deleted and won't be deleted. 4207c478bd9Sstevel@tonic-gate */ 4217c478bd9Sstevel@tonic-gate void 4227c478bd9Sstevel@tonic-gate ire_refrele(ire_t *ire) 4237c478bd9Sstevel@tonic-gate { 4247c478bd9Sstevel@tonic-gate IRE_REFRELE(ire); 4257c478bd9Sstevel@tonic-gate } 4267c478bd9Sstevel@tonic-gate 4277c478bd9Sstevel@tonic-gate void 4287c478bd9Sstevel@tonic-gate ire_refrele_notr(ire_t *ire) 4297c478bd9Sstevel@tonic-gate { 4307c478bd9Sstevel@tonic-gate IRE_REFRELE_NOTR(ire); 4317c478bd9Sstevel@tonic-gate } 4327c478bd9Sstevel@tonic-gate 4337c478bd9Sstevel@tonic-gate /* 4347c478bd9Sstevel@tonic-gate * kmem_cache_alloc constructor for IRE in kma space. 4357c478bd9Sstevel@tonic-gate * Note that when ire_mp is set the IRE is stored in that mblk and 4367c478bd9Sstevel@tonic-gate * not in this cache. 4377c478bd9Sstevel@tonic-gate */ 4387c478bd9Sstevel@tonic-gate /* ARGSUSED */ 4397c478bd9Sstevel@tonic-gate static int 4407c478bd9Sstevel@tonic-gate ip_ire_constructor(void *buf, void *cdrarg, int kmflags) 4417c478bd9Sstevel@tonic-gate { 4427c478bd9Sstevel@tonic-gate ire_t *ire = buf; 4437c478bd9Sstevel@tonic-gate 444c793af95Ssangeeta ire->ire_nce = NULL; 4457c478bd9Sstevel@tonic-gate 4467c478bd9Sstevel@tonic-gate return (0); 4477c478bd9Sstevel@tonic-gate } 4487c478bd9Sstevel@tonic-gate 4497c478bd9Sstevel@tonic-gate /* ARGSUSED1 */ 4507c478bd9Sstevel@tonic-gate static void 4517c478bd9Sstevel@tonic-gate ip_ire_destructor(void *buf, void *cdrarg) 4527c478bd9Sstevel@tonic-gate { 4537c478bd9Sstevel@tonic-gate ire_t *ire = buf; 4547c478bd9Sstevel@tonic-gate 455c793af95Ssangeeta ASSERT(ire->ire_nce == NULL); 4567c478bd9Sstevel@tonic-gate } 4577c478bd9Sstevel@tonic-gate 4587c478bd9Sstevel@tonic-gate /* 4597c478bd9Sstevel@tonic-gate * This function is associated with the IP_IOC_IRE_ADVISE_NO_REPLY 4607c478bd9Sstevel@tonic-gate * IOCTL. It is used by TCP (or other ULPs) to supply revised information 4617c478bd9Sstevel@tonic-gate * for an existing CACHED IRE. 4627c478bd9Sstevel@tonic-gate */ 4637c478bd9Sstevel@tonic-gate /* ARGSUSED */ 4647c478bd9Sstevel@tonic-gate int 4657c478bd9Sstevel@tonic-gate ip_ire_advise(queue_t *q, mblk_t *mp, cred_t *ioc_cr) 4667c478bd9Sstevel@tonic-gate { 4677c478bd9Sstevel@tonic-gate uchar_t *addr_ucp; 4687c478bd9Sstevel@tonic-gate ipic_t *ipic; 4697c478bd9Sstevel@tonic-gate ire_t *ire; 4707c478bd9Sstevel@tonic-gate ipaddr_t addr; 4717c478bd9Sstevel@tonic-gate in6_addr_t v6addr; 4727c478bd9Sstevel@tonic-gate irb_t *irb; 4737c478bd9Sstevel@tonic-gate zoneid_t zoneid; 4747c478bd9Sstevel@tonic-gate 4757c478bd9Sstevel@tonic-gate ASSERT(q->q_next == NULL); 4767c478bd9Sstevel@tonic-gate zoneid = Q_TO_CONN(q)->conn_zoneid; 4777c478bd9Sstevel@tonic-gate 4787c478bd9Sstevel@tonic-gate /* 4797c478bd9Sstevel@tonic-gate * Check privilege using the ioctl credential; if it is NULL 4807c478bd9Sstevel@tonic-gate * then this is a kernel message and therefor privileged. 4817c478bd9Sstevel@tonic-gate */ 4827c478bd9Sstevel@tonic-gate if (ioc_cr != NULL && secpolicy_net_config(ioc_cr, B_FALSE) != 0) 4837c478bd9Sstevel@tonic-gate return (EPERM); 4847c478bd9Sstevel@tonic-gate 4857c478bd9Sstevel@tonic-gate ipic = (ipic_t *)mp->b_rptr; 4867c478bd9Sstevel@tonic-gate if (!(addr_ucp = mi_offset_param(mp, ipic->ipic_addr_offset, 4877c478bd9Sstevel@tonic-gate ipic->ipic_addr_length))) { 4887c478bd9Sstevel@tonic-gate return (EINVAL); 4897c478bd9Sstevel@tonic-gate } 4907c478bd9Sstevel@tonic-gate if (!OK_32PTR(addr_ucp)) 4917c478bd9Sstevel@tonic-gate return (EINVAL); 4927c478bd9Sstevel@tonic-gate switch (ipic->ipic_addr_length) { 4937c478bd9Sstevel@tonic-gate case IP_ADDR_LEN: { 4947c478bd9Sstevel@tonic-gate /* Extract the destination address. */ 4957c478bd9Sstevel@tonic-gate addr = *(ipaddr_t *)addr_ucp; 4967c478bd9Sstevel@tonic-gate /* Find the corresponding IRE. */ 49745916cd2Sjpk ire = ire_cache_lookup(addr, zoneid, NULL); 4987c478bd9Sstevel@tonic-gate break; 4997c478bd9Sstevel@tonic-gate } 5007c478bd9Sstevel@tonic-gate case IPV6_ADDR_LEN: { 5017c478bd9Sstevel@tonic-gate /* Extract the destination address. */ 5027c478bd9Sstevel@tonic-gate v6addr = *(in6_addr_t *)addr_ucp; 5037c478bd9Sstevel@tonic-gate /* Find the corresponding IRE. */ 50445916cd2Sjpk ire = ire_cache_lookup_v6(&v6addr, zoneid, NULL); 5057c478bd9Sstevel@tonic-gate break; 5067c478bd9Sstevel@tonic-gate } 5077c478bd9Sstevel@tonic-gate default: 5087c478bd9Sstevel@tonic-gate return (EINVAL); 5097c478bd9Sstevel@tonic-gate } 5107c478bd9Sstevel@tonic-gate 5117c478bd9Sstevel@tonic-gate if (ire == NULL) 5127c478bd9Sstevel@tonic-gate return (ENOENT); 5137c478bd9Sstevel@tonic-gate /* 5147c478bd9Sstevel@tonic-gate * Update the round trip time estimate and/or the max frag size 5157c478bd9Sstevel@tonic-gate * and/or the slow start threshold. 5167c478bd9Sstevel@tonic-gate * 5177c478bd9Sstevel@tonic-gate * We serialize multiple advises using ire_lock. 5187c478bd9Sstevel@tonic-gate */ 5197c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 5207c478bd9Sstevel@tonic-gate if (ipic->ipic_rtt) { 5217c478bd9Sstevel@tonic-gate /* 5227c478bd9Sstevel@tonic-gate * If there is no old cached values, initialize them 5237c478bd9Sstevel@tonic-gate * conservatively. Set them to be (1.5 * new value). 5247c478bd9Sstevel@tonic-gate */ 5257c478bd9Sstevel@tonic-gate if (ire->ire_uinfo.iulp_rtt != 0) { 5267c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtt = (ire->ire_uinfo.iulp_rtt + 5277c478bd9Sstevel@tonic-gate ipic->ipic_rtt) >> 1; 5287c478bd9Sstevel@tonic-gate } else { 5297c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtt = ipic->ipic_rtt + 5307c478bd9Sstevel@tonic-gate (ipic->ipic_rtt >> 1); 5317c478bd9Sstevel@tonic-gate } 5327c478bd9Sstevel@tonic-gate if (ire->ire_uinfo.iulp_rtt_sd != 0) { 5337c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtt_sd = 5347c478bd9Sstevel@tonic-gate (ire->ire_uinfo.iulp_rtt_sd + 5357c478bd9Sstevel@tonic-gate ipic->ipic_rtt_sd) >> 1; 5367c478bd9Sstevel@tonic-gate } else { 5377c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtt_sd = ipic->ipic_rtt_sd + 5387c478bd9Sstevel@tonic-gate (ipic->ipic_rtt_sd >> 1); 5397c478bd9Sstevel@tonic-gate } 5407c478bd9Sstevel@tonic-gate } 5417c478bd9Sstevel@tonic-gate if (ipic->ipic_max_frag) 5427c478bd9Sstevel@tonic-gate ire->ire_max_frag = MIN(ipic->ipic_max_frag, IP_MAXPACKET); 5437c478bd9Sstevel@tonic-gate if (ipic->ipic_ssthresh != 0) { 5447c478bd9Sstevel@tonic-gate if (ire->ire_uinfo.iulp_ssthresh != 0) 5457c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_ssthresh = 5467c478bd9Sstevel@tonic-gate (ipic->ipic_ssthresh + 5477c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_ssthresh) >> 1; 5487c478bd9Sstevel@tonic-gate else 5497c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_ssthresh = ipic->ipic_ssthresh; 5507c478bd9Sstevel@tonic-gate } 5517c478bd9Sstevel@tonic-gate /* 5527c478bd9Sstevel@tonic-gate * Don't need the ire_lock below this. ire_type does not change 5537c478bd9Sstevel@tonic-gate * after initialization. ire_marks is protected by irb_lock. 5547c478bd9Sstevel@tonic-gate */ 5557c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 5567c478bd9Sstevel@tonic-gate 5577c478bd9Sstevel@tonic-gate if (ipic->ipic_ire_marks != 0 && ire->ire_type == IRE_CACHE) { 5587c478bd9Sstevel@tonic-gate /* 5597c478bd9Sstevel@tonic-gate * Only increment the temporary IRE count if the original 5607c478bd9Sstevel@tonic-gate * IRE is not already marked temporary. 5617c478bd9Sstevel@tonic-gate */ 5627c478bd9Sstevel@tonic-gate irb = ire->ire_bucket; 5637c478bd9Sstevel@tonic-gate rw_enter(&irb->irb_lock, RW_WRITER); 5647c478bd9Sstevel@tonic-gate if ((ipic->ipic_ire_marks & IRE_MARK_TEMPORARY) && 5657c478bd9Sstevel@tonic-gate !(ire->ire_marks & IRE_MARK_TEMPORARY)) { 5667c478bd9Sstevel@tonic-gate irb->irb_tmp_ire_cnt++; 5677c478bd9Sstevel@tonic-gate } 5687c478bd9Sstevel@tonic-gate ire->ire_marks |= ipic->ipic_ire_marks; 5697c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 5707c478bd9Sstevel@tonic-gate } 5717c478bd9Sstevel@tonic-gate 5727c478bd9Sstevel@tonic-gate ire_refrele(ire); 5737c478bd9Sstevel@tonic-gate return (0); 5747c478bd9Sstevel@tonic-gate } 5757c478bd9Sstevel@tonic-gate 5767c478bd9Sstevel@tonic-gate /* 5777c478bd9Sstevel@tonic-gate * This function is associated with the IP_IOC_IRE_DELETE[_NO_REPLY] 5787c478bd9Sstevel@tonic-gate * IOCTL[s]. The NO_REPLY form is used by TCP to delete a route IRE 5797c478bd9Sstevel@tonic-gate * for a host that is not responding. This will force an attempt to 580dc041e83Scarlsonj * establish a new route, if available, and flush out the ARP entry so 581dc041e83Scarlsonj * it will re-resolve. Management processes may want to use the 582dc041e83Scarlsonj * version that generates a reply. 5837c478bd9Sstevel@tonic-gate * 5847c478bd9Sstevel@tonic-gate * This function does not support IPv6 since Neighbor Unreachability Detection 5857c478bd9Sstevel@tonic-gate * means that negative advise like this is useless. 5867c478bd9Sstevel@tonic-gate */ 5877c478bd9Sstevel@tonic-gate /* ARGSUSED */ 5887c478bd9Sstevel@tonic-gate int 5897c478bd9Sstevel@tonic-gate ip_ire_delete(queue_t *q, mblk_t *mp, cred_t *ioc_cr) 5907c478bd9Sstevel@tonic-gate { 5917c478bd9Sstevel@tonic-gate uchar_t *addr_ucp; 5927c478bd9Sstevel@tonic-gate ipaddr_t addr; 5937c478bd9Sstevel@tonic-gate ire_t *ire; 5947c478bd9Sstevel@tonic-gate ipid_t *ipid; 5957c478bd9Sstevel@tonic-gate boolean_t routing_sock_info = B_FALSE; /* Sent info? */ 5967c478bd9Sstevel@tonic-gate zoneid_t zoneid; 597c793af95Ssangeeta ire_t *gire = NULL; 598dc041e83Scarlsonj ill_t *ill; 599dc041e83Scarlsonj mblk_t *arp_mp; 6007c478bd9Sstevel@tonic-gate 6017c478bd9Sstevel@tonic-gate ASSERT(q->q_next == NULL); 6027c478bd9Sstevel@tonic-gate zoneid = Q_TO_CONN(q)->conn_zoneid; 6037c478bd9Sstevel@tonic-gate 6047c478bd9Sstevel@tonic-gate /* 6057c478bd9Sstevel@tonic-gate * Check privilege using the ioctl credential; if it is NULL 6067c478bd9Sstevel@tonic-gate * then this is a kernel message and therefor privileged. 6077c478bd9Sstevel@tonic-gate */ 6087c478bd9Sstevel@tonic-gate if (ioc_cr != NULL && secpolicy_net_config(ioc_cr, B_FALSE) != 0) 6097c478bd9Sstevel@tonic-gate return (EPERM); 6107c478bd9Sstevel@tonic-gate 6117c478bd9Sstevel@tonic-gate ipid = (ipid_t *)mp->b_rptr; 6127c478bd9Sstevel@tonic-gate 6137c478bd9Sstevel@tonic-gate /* Only actions on IRE_CACHEs are acceptable at present. */ 6147c478bd9Sstevel@tonic-gate if (ipid->ipid_ire_type != IRE_CACHE) 6157c478bd9Sstevel@tonic-gate return (EINVAL); 6167c478bd9Sstevel@tonic-gate 6177c478bd9Sstevel@tonic-gate addr_ucp = mi_offset_param(mp, ipid->ipid_addr_offset, 6187c478bd9Sstevel@tonic-gate ipid->ipid_addr_length); 6197c478bd9Sstevel@tonic-gate if (addr_ucp == NULL || !OK_32PTR(addr_ucp)) 6207c478bd9Sstevel@tonic-gate return (EINVAL); 6217c478bd9Sstevel@tonic-gate switch (ipid->ipid_addr_length) { 6227c478bd9Sstevel@tonic-gate case IP_ADDR_LEN: 6237c478bd9Sstevel@tonic-gate /* addr_ucp points at IP addr */ 6247c478bd9Sstevel@tonic-gate break; 6257c478bd9Sstevel@tonic-gate case sizeof (sin_t): { 6267c478bd9Sstevel@tonic-gate sin_t *sin; 6277c478bd9Sstevel@tonic-gate /* 6287c478bd9Sstevel@tonic-gate * got complete (sockaddr) address - increment addr_ucp to point 6297c478bd9Sstevel@tonic-gate * at the ip_addr field. 6307c478bd9Sstevel@tonic-gate */ 6317c478bd9Sstevel@tonic-gate sin = (sin_t *)addr_ucp; 6327c478bd9Sstevel@tonic-gate addr_ucp = (uchar_t *)&sin->sin_addr.s_addr; 6337c478bd9Sstevel@tonic-gate break; 6347c478bd9Sstevel@tonic-gate } 6357c478bd9Sstevel@tonic-gate default: 6367c478bd9Sstevel@tonic-gate return (EINVAL); 6377c478bd9Sstevel@tonic-gate } 6387c478bd9Sstevel@tonic-gate /* Extract the destination address. */ 6397c478bd9Sstevel@tonic-gate bcopy(addr_ucp, &addr, IP_ADDR_LEN); 6407c478bd9Sstevel@tonic-gate 6417c478bd9Sstevel@tonic-gate /* Try to find the CACHED IRE. */ 64245916cd2Sjpk ire = ire_cache_lookup(addr, zoneid, NULL); 6437c478bd9Sstevel@tonic-gate 6447c478bd9Sstevel@tonic-gate /* Nail it. */ 6457c478bd9Sstevel@tonic-gate if (ire) { 6467c478bd9Sstevel@tonic-gate /* Allow delete only on CACHE entries */ 6477c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) { 6487c478bd9Sstevel@tonic-gate ire_refrele(ire); 6497c478bd9Sstevel@tonic-gate return (EINVAL); 6507c478bd9Sstevel@tonic-gate } 6517c478bd9Sstevel@tonic-gate 6527c478bd9Sstevel@tonic-gate /* 6537c478bd9Sstevel@tonic-gate * Verify that the IRE has been around for a while. 6547c478bd9Sstevel@tonic-gate * This is to protect against transport protocols 6557c478bd9Sstevel@tonic-gate * that are too eager in sending delete messages. 6567c478bd9Sstevel@tonic-gate */ 6577c478bd9Sstevel@tonic-gate if (gethrestime_sec() < 6587c478bd9Sstevel@tonic-gate ire->ire_create_time + ip_ignore_delete_time) { 6597c478bd9Sstevel@tonic-gate ire_refrele(ire); 6607c478bd9Sstevel@tonic-gate return (EINVAL); 6617c478bd9Sstevel@tonic-gate } 6627c478bd9Sstevel@tonic-gate /* 6637c478bd9Sstevel@tonic-gate * Now we have a potentially dead cache entry. We need 6647c478bd9Sstevel@tonic-gate * to remove it. 665c793af95Ssangeeta * If this cache entry is generated from a 666c793af95Ssangeeta * default route (i.e., ire_cmask == 0), 6677c478bd9Sstevel@tonic-gate * search the default list and mark it dead and some 6687c478bd9Sstevel@tonic-gate * background process will try to activate it. 6697c478bd9Sstevel@tonic-gate */ 6707c478bd9Sstevel@tonic-gate if ((ire->ire_gateway_addr != 0) && (ire->ire_cmask == 0)) { 6717c478bd9Sstevel@tonic-gate /* 6727c478bd9Sstevel@tonic-gate * Make sure that we pick a different 6737c478bd9Sstevel@tonic-gate * IRE_DEFAULT next time. 6747c478bd9Sstevel@tonic-gate */ 6757c478bd9Sstevel@tonic-gate ire_t *gw_ire; 676c793af95Ssangeeta irb_t *irb = NULL; 677c793af95Ssangeeta uint_t match_flags; 6787c478bd9Sstevel@tonic-gate 679c793af95Ssangeeta match_flags = (MATCH_IRE_DEFAULT | MATCH_IRE_RJ_BHOLE); 680c793af95Ssangeeta 681c793af95Ssangeeta gire = ire_ftable_lookup(ire->ire_addr, 682c793af95Ssangeeta ire->ire_cmask, 0, 0, 683c793af95Ssangeeta ire->ire_ipif, NULL, zoneid, 0, NULL, match_flags); 684c793af95Ssangeeta 685c793af95Ssangeeta ip3dbg(("ire_ftable_lookup() returned gire %p\n", 686c793af95Ssangeeta (void *)gire)); 687c793af95Ssangeeta 688c793af95Ssangeeta if (gire != NULL) { 689c793af95Ssangeeta irb = gire->ire_bucket; 6907c478bd9Sstevel@tonic-gate 6917c478bd9Sstevel@tonic-gate /* 6927c478bd9Sstevel@tonic-gate * We grab it as writer just to serialize 6937c478bd9Sstevel@tonic-gate * multiple threads trying to bump up 694c793af95Ssangeeta * irb_rr_origin 6957c478bd9Sstevel@tonic-gate */ 6967c478bd9Sstevel@tonic-gate rw_enter(&irb->irb_lock, RW_WRITER); 697c793af95Ssangeeta if ((gw_ire = irb->irb_rr_origin) == NULL) { 6987c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 6997c478bd9Sstevel@tonic-gate goto done; 7007c478bd9Sstevel@tonic-gate } 701c793af95Ssangeeta 7027c478bd9Sstevel@tonic-gate 7037c478bd9Sstevel@tonic-gate /* Skip past the potentially bad gateway */ 7047c478bd9Sstevel@tonic-gate if (ire->ire_gateway_addr == 7057c478bd9Sstevel@tonic-gate gw_ire->ire_gateway_addr) 706c793af95Ssangeeta irb->irb_rr_origin = gw_ire->ire_next; 7077c478bd9Sstevel@tonic-gate 7087c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 7097c478bd9Sstevel@tonic-gate } 7107c478bd9Sstevel@tonic-gate } 7117c478bd9Sstevel@tonic-gate done: 712c793af95Ssangeeta if (gire != NULL) 713c793af95Ssangeeta IRE_REFRELE(gire); 7147c478bd9Sstevel@tonic-gate /* report the bad route to routing sockets */ 7157c478bd9Sstevel@tonic-gate ip_rts_change(RTM_LOSING, ire->ire_addr, ire->ire_gateway_addr, 7167c478bd9Sstevel@tonic-gate ire->ire_mask, ire->ire_src_addr, 0, 0, 0, 7177c478bd9Sstevel@tonic-gate (RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_IFA)); 7187c478bd9Sstevel@tonic-gate routing_sock_info = B_TRUE; 719dc041e83Scarlsonj 720dc041e83Scarlsonj /* 721dc041e83Scarlsonj * TCP is really telling us to start over completely, and it 722dc041e83Scarlsonj * expects that we'll resend the ARP query. Tell ARP to 723dc041e83Scarlsonj * discard the entry, if this is a local destination. 724dc041e83Scarlsonj */ 725dc041e83Scarlsonj ill = ire->ire_stq->q_ptr; 726dc041e83Scarlsonj if (ire->ire_gateway_addr == 0 && 727dc041e83Scarlsonj (arp_mp = ill_ared_alloc(ill, addr)) != NULL) { 728dc041e83Scarlsonj putnext(ill->ill_rq, arp_mp); 729dc041e83Scarlsonj } 730dc041e83Scarlsonj 7317c478bd9Sstevel@tonic-gate ire_delete(ire); 7327c478bd9Sstevel@tonic-gate ire_refrele(ire); 7337c478bd9Sstevel@tonic-gate } 7347c478bd9Sstevel@tonic-gate /* Also look for an IRE_HOST_REDIRECT and remove it if present */ 7357c478bd9Sstevel@tonic-gate ire = ire_route_lookup(addr, 0, 0, IRE_HOST_REDIRECT, NULL, NULL, 73645916cd2Sjpk ALL_ZONES, NULL, MATCH_IRE_TYPE); 7377c478bd9Sstevel@tonic-gate 7387c478bd9Sstevel@tonic-gate /* Nail it. */ 7397c478bd9Sstevel@tonic-gate if (ire) { 7407c478bd9Sstevel@tonic-gate if (!routing_sock_info) { 7417c478bd9Sstevel@tonic-gate ip_rts_change(RTM_LOSING, ire->ire_addr, 7427c478bd9Sstevel@tonic-gate ire->ire_gateway_addr, ire->ire_mask, 7437c478bd9Sstevel@tonic-gate ire->ire_src_addr, 0, 0, 0, 7447c478bd9Sstevel@tonic-gate (RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_IFA)); 7457c478bd9Sstevel@tonic-gate } 7467c478bd9Sstevel@tonic-gate ire_delete(ire); 7477c478bd9Sstevel@tonic-gate ire_refrele(ire); 7487c478bd9Sstevel@tonic-gate } 7497c478bd9Sstevel@tonic-gate return (0); 7507c478bd9Sstevel@tonic-gate } 7517c478bd9Sstevel@tonic-gate 7527c478bd9Sstevel@tonic-gate /* 7537c478bd9Sstevel@tonic-gate * Named Dispatch routine to produce a formatted report on all IREs. 7547c478bd9Sstevel@tonic-gate * This report is accessed by using the ndd utility to "get" ND variable 7557c478bd9Sstevel@tonic-gate * "ipv4_ire_status". 7567c478bd9Sstevel@tonic-gate */ 7577c478bd9Sstevel@tonic-gate /* ARGSUSED */ 7587c478bd9Sstevel@tonic-gate int 7597c478bd9Sstevel@tonic-gate ip_ire_report(queue_t *q, mblk_t *mp, caddr_t arg, cred_t *ioc_cr) 7607c478bd9Sstevel@tonic-gate { 7617c478bd9Sstevel@tonic-gate zoneid_t zoneid; 7627c478bd9Sstevel@tonic-gate 7637c478bd9Sstevel@tonic-gate (void) mi_mpprintf(mp, 7647c478bd9Sstevel@tonic-gate "IRE " MI_COL_HDRPAD_STR 7657c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 7667c478bd9Sstevel@tonic-gate "rfq " MI_COL_HDRPAD_STR 7677c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 7687c478bd9Sstevel@tonic-gate "stq " MI_COL_HDRPAD_STR 7697c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 7707c478bd9Sstevel@tonic-gate " zone " 7717c478bd9Sstevel@tonic-gate /* 12345 */ 7727c478bd9Sstevel@tonic-gate "addr mask " 7737c478bd9Sstevel@tonic-gate /* 123.123.123.123 123.123.123.123 */ 7747c478bd9Sstevel@tonic-gate "src gateway mxfrg rtt rtt_sd ssthresh ref " 7757c478bd9Sstevel@tonic-gate /* 123.123.123.123 123.123.123.123 12345 12345 123456 12345678 123 */ 7767c478bd9Sstevel@tonic-gate "rtomax tstamp_ok wscale_ok ecn_ok pmtud_ok sack sendpipe " 7777c478bd9Sstevel@tonic-gate /* 123456 123456789 123456789 123456 12345678 1234 12345678 */ 7787c478bd9Sstevel@tonic-gate "recvpipe in/out/forward type"); 7797c478bd9Sstevel@tonic-gate /* 12345678 in/out/forward xxxxxxxxxx */ 7807c478bd9Sstevel@tonic-gate 7817c478bd9Sstevel@tonic-gate /* 7827c478bd9Sstevel@tonic-gate * Because of the ndd constraint, at most we can have 64K buffer 7837c478bd9Sstevel@tonic-gate * to put in all IRE info. So to be more efficient, just 7847c478bd9Sstevel@tonic-gate * allocate a 64K buffer here, assuming we need that large buffer. 7857c478bd9Sstevel@tonic-gate * This should be OK as only root can do ndd /dev/ip. 7867c478bd9Sstevel@tonic-gate */ 7877c478bd9Sstevel@tonic-gate if ((mp->b_cont = allocb(ND_MAX_BUF_LEN, BPRI_HI)) == NULL) { 7887c478bd9Sstevel@tonic-gate /* The following may work even if we cannot get a large buf. */ 7897c478bd9Sstevel@tonic-gate (void) mi_mpprintf(mp, "<< Out of buffer >>\n"); 7907c478bd9Sstevel@tonic-gate return (0); 7917c478bd9Sstevel@tonic-gate } 7927c478bd9Sstevel@tonic-gate 7937c478bd9Sstevel@tonic-gate zoneid = Q_TO_CONN(q)->conn_zoneid; 7947c478bd9Sstevel@tonic-gate if (zoneid == GLOBAL_ZONEID) 7957c478bd9Sstevel@tonic-gate zoneid = ALL_ZONES; 7967c478bd9Sstevel@tonic-gate 79745916cd2Sjpk ire_walk_v4(ire_report_ftable, mp->b_cont, zoneid); 79845916cd2Sjpk ire_walk_v4(ire_report_ctable, mp->b_cont, zoneid); 7997c478bd9Sstevel@tonic-gate 8007c478bd9Sstevel@tonic-gate return (0); 8017c478bd9Sstevel@tonic-gate } 8027c478bd9Sstevel@tonic-gate 8037c478bd9Sstevel@tonic-gate 8047c478bd9Sstevel@tonic-gate /* ire_walk routine invoked for ip_ire_report for each cached IRE. */ 8057c478bd9Sstevel@tonic-gate static void 8067c478bd9Sstevel@tonic-gate ire_report_ctable(ire_t *ire, char *mp) 8077c478bd9Sstevel@tonic-gate { 8087c478bd9Sstevel@tonic-gate char buf1[16]; 8097c478bd9Sstevel@tonic-gate char buf2[16]; 8107c478bd9Sstevel@tonic-gate char buf3[16]; 8117c478bd9Sstevel@tonic-gate char buf4[16]; 8127c478bd9Sstevel@tonic-gate uint_t fo_pkt_count; 8137c478bd9Sstevel@tonic-gate uint_t ib_pkt_count; 8147c478bd9Sstevel@tonic-gate int ref; 8157c478bd9Sstevel@tonic-gate uint_t print_len, buf_len; 8167c478bd9Sstevel@tonic-gate 8177c478bd9Sstevel@tonic-gate if ((ire->ire_type & IRE_CACHETABLE) == 0) 8187c478bd9Sstevel@tonic-gate return; 8197c478bd9Sstevel@tonic-gate buf_len = ((mblk_t *)mp)->b_datap->db_lim - ((mblk_t *)mp)->b_wptr; 8207c478bd9Sstevel@tonic-gate if (buf_len <= 0) 8217c478bd9Sstevel@tonic-gate return; 8227c478bd9Sstevel@tonic-gate 8237c478bd9Sstevel@tonic-gate /* Number of active references of this ire */ 8247c478bd9Sstevel@tonic-gate ref = ire->ire_refcnt; 8257c478bd9Sstevel@tonic-gate /* "inbound" to a non local address is a forward */ 8267c478bd9Sstevel@tonic-gate ib_pkt_count = ire->ire_ib_pkt_count; 8277c478bd9Sstevel@tonic-gate fo_pkt_count = 0; 8287c478bd9Sstevel@tonic-gate if (!(ire->ire_type & (IRE_LOCAL|IRE_BROADCAST))) { 8297c478bd9Sstevel@tonic-gate fo_pkt_count = ib_pkt_count; 8307c478bd9Sstevel@tonic-gate ib_pkt_count = 0; 8317c478bd9Sstevel@tonic-gate } 8327c478bd9Sstevel@tonic-gate print_len = snprintf((char *)((mblk_t *)mp)->b_wptr, buf_len, 8337c478bd9Sstevel@tonic-gate MI_COL_PTRFMT_STR MI_COL_PTRFMT_STR MI_COL_PTRFMT_STR "%5d " 8347c478bd9Sstevel@tonic-gate "%s %s %s %s %05d %05ld %06ld %08d %03d %06d %09d %09d %06d %08d " 8357c478bd9Sstevel@tonic-gate "%04d %08d %08d %d/%d/%d %s\n", 8367c478bd9Sstevel@tonic-gate (void *)ire, (void *)ire->ire_rfq, (void *)ire->ire_stq, 8377c478bd9Sstevel@tonic-gate (int)ire->ire_zoneid, 8387c478bd9Sstevel@tonic-gate ip_dot_addr(ire->ire_addr, buf1), ip_dot_addr(ire->ire_mask, buf2), 8397c478bd9Sstevel@tonic-gate ip_dot_addr(ire->ire_src_addr, buf3), 8407c478bd9Sstevel@tonic-gate ip_dot_addr(ire->ire_gateway_addr, buf4), 8417c478bd9Sstevel@tonic-gate ire->ire_max_frag, ire->ire_uinfo.iulp_rtt, 8427c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtt_sd, ire->ire_uinfo.iulp_ssthresh, ref, 8437c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtomax, 8447c478bd9Sstevel@tonic-gate (ire->ire_uinfo.iulp_tstamp_ok ? 1: 0), 8457c478bd9Sstevel@tonic-gate (ire->ire_uinfo.iulp_wscale_ok ? 1: 0), 8467c478bd9Sstevel@tonic-gate (ire->ire_uinfo.iulp_ecn_ok ? 1: 0), 8477c478bd9Sstevel@tonic-gate (ire->ire_uinfo.iulp_pmtud_ok ? 1: 0), 8487c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_sack, 8497c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_spipe, ire->ire_uinfo.iulp_rpipe, 8507c478bd9Sstevel@tonic-gate ib_pkt_count, ire->ire_ob_pkt_count, fo_pkt_count, 8517c478bd9Sstevel@tonic-gate ip_nv_lookup(ire_nv_tbl, (int)ire->ire_type)); 8527c478bd9Sstevel@tonic-gate if (print_len < buf_len) { 8537c478bd9Sstevel@tonic-gate ((mblk_t *)mp)->b_wptr += print_len; 8547c478bd9Sstevel@tonic-gate } else { 8557c478bd9Sstevel@tonic-gate ((mblk_t *)mp)->b_wptr += buf_len; 8567c478bd9Sstevel@tonic-gate } 8577c478bd9Sstevel@tonic-gate } 8587c478bd9Sstevel@tonic-gate 8597c478bd9Sstevel@tonic-gate /* ARGSUSED */ 8607c478bd9Sstevel@tonic-gate int 8617c478bd9Sstevel@tonic-gate ip_ire_report_mrtun(queue_t *q, mblk_t *mp, caddr_t arg, cred_t *ioc_cr) 8627c478bd9Sstevel@tonic-gate { 8637c478bd9Sstevel@tonic-gate (void) mi_mpprintf(mp, 8647c478bd9Sstevel@tonic-gate "IRE " MI_COL_HDRPAD_STR 8657c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 8667c478bd9Sstevel@tonic-gate "stq " MI_COL_HDRPAD_STR 8677c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 8687c478bd9Sstevel@tonic-gate "in_ill " MI_COL_HDRPAD_STR 8697c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 8707c478bd9Sstevel@tonic-gate "in_src_addr " 8717c478bd9Sstevel@tonic-gate /* 123.123.123.123 */ 8727c478bd9Sstevel@tonic-gate "max_frag " 8737c478bd9Sstevel@tonic-gate /* 12345 */ 8747c478bd9Sstevel@tonic-gate "ref "); 8757c478bd9Sstevel@tonic-gate /* 123 */ 8767c478bd9Sstevel@tonic-gate 87745916cd2Sjpk ire_walk_ill_mrtun(0, 0, ire_report_mrtun_table, mp, NULL); 8787c478bd9Sstevel@tonic-gate return (0); 8797c478bd9Sstevel@tonic-gate } 8807c478bd9Sstevel@tonic-gate 8817c478bd9Sstevel@tonic-gate /* mrtun report table - supports ipv4_mrtun_ire_status ndd variable */ 8827c478bd9Sstevel@tonic-gate 8837c478bd9Sstevel@tonic-gate static void 8847c478bd9Sstevel@tonic-gate ire_report_mrtun_table(ire_t *ire, char *mp) 8857c478bd9Sstevel@tonic-gate { 8867c478bd9Sstevel@tonic-gate char buf1[INET_ADDRSTRLEN]; 8877c478bd9Sstevel@tonic-gate int ref; 8887c478bd9Sstevel@tonic-gate 8897c478bd9Sstevel@tonic-gate /* Number of active references of this ire */ 8907c478bd9Sstevel@tonic-gate ref = ire->ire_refcnt; 8917c478bd9Sstevel@tonic-gate ASSERT(ire->ire_type == IRE_MIPRTUN); 8927c478bd9Sstevel@tonic-gate (void) mi_mpprintf((mblk_t *)mp, 8937c478bd9Sstevel@tonic-gate MI_COL_PTRFMT_STR MI_COL_PTRFMT_STR MI_COL_PTRFMT_STR 8947c478bd9Sstevel@tonic-gate "%s %05d %03d", 8957c478bd9Sstevel@tonic-gate (void *)ire, (void *)ire->ire_stq, 8967c478bd9Sstevel@tonic-gate (void *)ire->ire_in_ill, 8977c478bd9Sstevel@tonic-gate ip_dot_addr(ire->ire_in_src_addr, buf1), 8987c478bd9Sstevel@tonic-gate ire->ire_max_frag, ref); 8997c478bd9Sstevel@tonic-gate } 9007c478bd9Sstevel@tonic-gate 9017c478bd9Sstevel@tonic-gate /* 9027c478bd9Sstevel@tonic-gate * Dispatch routine to format ires in interface based routine 9037c478bd9Sstevel@tonic-gate */ 9047c478bd9Sstevel@tonic-gate /* ARGSUSED */ 9057c478bd9Sstevel@tonic-gate int 9067c478bd9Sstevel@tonic-gate ip_ire_report_srcif(queue_t *q, mblk_t *mp, caddr_t arg, cred_t *ioc_cr) 9077c478bd9Sstevel@tonic-gate { 9087c478bd9Sstevel@tonic-gate 9097c478bd9Sstevel@tonic-gate /* Report all interface based ires */ 9107c478bd9Sstevel@tonic-gate 9117c478bd9Sstevel@tonic-gate (void) mi_mpprintf(mp, 9127c478bd9Sstevel@tonic-gate "IRE " MI_COL_HDRPAD_STR 9137c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 9147c478bd9Sstevel@tonic-gate "stq " MI_COL_HDRPAD_STR 9157c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 9167c478bd9Sstevel@tonic-gate "in_ill " MI_COL_HDRPAD_STR 9177c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 9187c478bd9Sstevel@tonic-gate "addr " 9197c478bd9Sstevel@tonic-gate /* 123.123.123.123 */ 9207c478bd9Sstevel@tonic-gate "gateway " 9217c478bd9Sstevel@tonic-gate /* 123.123.123.123 */ 9227c478bd9Sstevel@tonic-gate "max_frag " 9237c478bd9Sstevel@tonic-gate /* 12345 */ 9247c478bd9Sstevel@tonic-gate "ref " 9257c478bd9Sstevel@tonic-gate /* 123 */ 9267c478bd9Sstevel@tonic-gate "type " 9277c478bd9Sstevel@tonic-gate /* ABCDEFGH */ 9287c478bd9Sstevel@tonic-gate "in/out/forward"); 92945916cd2Sjpk ire_walk_srcif_table_v4(ire_report_srcif_table, mp); 9307c478bd9Sstevel@tonic-gate return (0); 9317c478bd9Sstevel@tonic-gate } 9327c478bd9Sstevel@tonic-gate 9337c478bd9Sstevel@tonic-gate /* Reports the interface table ires */ 9347c478bd9Sstevel@tonic-gate static void 9357c478bd9Sstevel@tonic-gate ire_report_srcif_table(ire_t *ire, char *mp) 9367c478bd9Sstevel@tonic-gate { 9377c478bd9Sstevel@tonic-gate char buf1[INET_ADDRSTRLEN]; 9387c478bd9Sstevel@tonic-gate char buf2[INET_ADDRSTRLEN]; 9397c478bd9Sstevel@tonic-gate int ref; 9407c478bd9Sstevel@tonic-gate 9417c478bd9Sstevel@tonic-gate ref = ire->ire_refcnt; 9427c478bd9Sstevel@tonic-gate (void) mi_mpprintf((mblk_t *)mp, 9437c478bd9Sstevel@tonic-gate MI_COL_PTRFMT_STR MI_COL_PTRFMT_STR MI_COL_PTRFMT_STR 9447c478bd9Sstevel@tonic-gate "%s %s %05d %03d %s %d", 9457c478bd9Sstevel@tonic-gate (void *)ire, (void *)ire->ire_stq, 9467c478bd9Sstevel@tonic-gate (void *)ire->ire_in_ill, 9477c478bd9Sstevel@tonic-gate ip_dot_addr(ire->ire_addr, buf1), 9487c478bd9Sstevel@tonic-gate ip_dot_addr(ire->ire_gateway_addr, buf2), 9497c478bd9Sstevel@tonic-gate ire->ire_max_frag, ref, 9507c478bd9Sstevel@tonic-gate ip_nv_lookup(ire_nv_tbl, (int)ire->ire_type), 9517c478bd9Sstevel@tonic-gate ire->ire_ib_pkt_count); 9527c478bd9Sstevel@tonic-gate 9537c478bd9Sstevel@tonic-gate } 9547c478bd9Sstevel@tonic-gate /* 9557c478bd9Sstevel@tonic-gate * ip_ire_req is called by ip_wput when an IRE_DB_REQ_TYPE message is handed 9567c478bd9Sstevel@tonic-gate * down from the Upper Level Protocol to request a copy of the IRE (to check 9577c478bd9Sstevel@tonic-gate * its type or to extract information like round-trip time estimates or the 9587c478bd9Sstevel@tonic-gate * MTU.) 9597c478bd9Sstevel@tonic-gate * The address is assumed to be in the ire_addr field. If no IRE is found 9607c478bd9Sstevel@tonic-gate * an IRE is returned with ire_type being zero. 9617c478bd9Sstevel@tonic-gate * Note that the upper lavel protocol has to check for broadcast 9627c478bd9Sstevel@tonic-gate * (IRE_BROADCAST) and multicast (CLASSD(addr)). 9637c478bd9Sstevel@tonic-gate * If there is a b_cont the resulting IRE_DB_TYPE mblk is placed at the 9647c478bd9Sstevel@tonic-gate * end of the returned message. 9657c478bd9Sstevel@tonic-gate * 9667c478bd9Sstevel@tonic-gate * TCP sends down a message of this type with a connection request packet 9677c478bd9Sstevel@tonic-gate * chained on. UDP and ICMP send it down to verify that a route exists for 9687c478bd9Sstevel@tonic-gate * the destination address when they get connected. 9697c478bd9Sstevel@tonic-gate */ 9707c478bd9Sstevel@tonic-gate void 9717c478bd9Sstevel@tonic-gate ip_ire_req(queue_t *q, mblk_t *mp) 9727c478bd9Sstevel@tonic-gate { 9737c478bd9Sstevel@tonic-gate ire_t *inire; 9747c478bd9Sstevel@tonic-gate ire_t *ire; 9757c478bd9Sstevel@tonic-gate mblk_t *mp1; 9767c478bd9Sstevel@tonic-gate ire_t *sire = NULL; 9777c478bd9Sstevel@tonic-gate zoneid_t zoneid = Q_TO_CONN(q)->conn_zoneid; 9787c478bd9Sstevel@tonic-gate 9797c478bd9Sstevel@tonic-gate if ((mp->b_wptr - mp->b_rptr) < sizeof (ire_t) || 9807c478bd9Sstevel@tonic-gate !OK_32PTR(mp->b_rptr)) { 9817c478bd9Sstevel@tonic-gate freemsg(mp); 9827c478bd9Sstevel@tonic-gate return; 9837c478bd9Sstevel@tonic-gate } 9847c478bd9Sstevel@tonic-gate inire = (ire_t *)mp->b_rptr; 9857c478bd9Sstevel@tonic-gate /* 9867c478bd9Sstevel@tonic-gate * Got it, now take our best shot at an IRE. 9877c478bd9Sstevel@tonic-gate */ 9887c478bd9Sstevel@tonic-gate if (inire->ire_ipversion == IPV6_VERSION) { 9897c478bd9Sstevel@tonic-gate ire = ire_route_lookup_v6(&inire->ire_addr_v6, 0, 0, 0, 99045916cd2Sjpk NULL, &sire, zoneid, NULL, 9917c478bd9Sstevel@tonic-gate (MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT)); 9927c478bd9Sstevel@tonic-gate } else { 9937c478bd9Sstevel@tonic-gate ASSERT(inire->ire_ipversion == IPV4_VERSION); 9947c478bd9Sstevel@tonic-gate ire = ire_route_lookup(inire->ire_addr, 0, 0, 0, 99545916cd2Sjpk NULL, &sire, zoneid, NULL, 9967c478bd9Sstevel@tonic-gate (MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT)); 9977c478bd9Sstevel@tonic-gate } 9987c478bd9Sstevel@tonic-gate 9997c478bd9Sstevel@tonic-gate /* 10007c478bd9Sstevel@tonic-gate * We prevent returning IRES with source address INADDR_ANY 10017c478bd9Sstevel@tonic-gate * as these were temporarily created for sending packets 10027c478bd9Sstevel@tonic-gate * from endpoints that have conn_unspec_src set. 10037c478bd9Sstevel@tonic-gate */ 10047c478bd9Sstevel@tonic-gate if (ire == NULL || 10057c478bd9Sstevel@tonic-gate (ire->ire_ipversion == IPV4_VERSION && 10067c478bd9Sstevel@tonic-gate ire->ire_src_addr == INADDR_ANY) || 10077c478bd9Sstevel@tonic-gate (ire->ire_ipversion == IPV6_VERSION && 10087c478bd9Sstevel@tonic-gate IN6_IS_ADDR_UNSPECIFIED(&ire->ire_src_addr_v6))) { 10097c478bd9Sstevel@tonic-gate inire->ire_type = 0; 10107c478bd9Sstevel@tonic-gate } else { 10117c478bd9Sstevel@tonic-gate bcopy(ire, inire, sizeof (ire_t)); 10127c478bd9Sstevel@tonic-gate /* Copy the route metrics from the parent. */ 10137c478bd9Sstevel@tonic-gate if (sire != NULL) { 10147c478bd9Sstevel@tonic-gate bcopy(&(sire->ire_uinfo), &(inire->ire_uinfo), 10157c478bd9Sstevel@tonic-gate sizeof (iulp_t)); 10167c478bd9Sstevel@tonic-gate } 10177c478bd9Sstevel@tonic-gate 10187c478bd9Sstevel@tonic-gate /* 10197c478bd9Sstevel@tonic-gate * As we don't lookup global policy here, we may not 10207c478bd9Sstevel@tonic-gate * pass the right size if per-socket policy is not 10217c478bd9Sstevel@tonic-gate * present. For these cases, path mtu discovery will 10227c478bd9Sstevel@tonic-gate * do the right thing. 10237c478bd9Sstevel@tonic-gate */ 10247c478bd9Sstevel@tonic-gate inire->ire_ipsec_overhead = conn_ipsec_length(Q_TO_CONN(q)); 10257c478bd9Sstevel@tonic-gate 10267c478bd9Sstevel@tonic-gate /* Pass the latest setting of the ip_path_mtu_discovery */ 10277c478bd9Sstevel@tonic-gate inire->ire_frag_flag |= (ip_path_mtu_discovery) ? IPH_DF : 0; 10287c478bd9Sstevel@tonic-gate } 10297c478bd9Sstevel@tonic-gate if (ire != NULL) 10307c478bd9Sstevel@tonic-gate ire_refrele(ire); 10317c478bd9Sstevel@tonic-gate if (sire != NULL) 10327c478bd9Sstevel@tonic-gate ire_refrele(sire); 10337c478bd9Sstevel@tonic-gate mp->b_wptr = &mp->b_rptr[sizeof (ire_t)]; 10347c478bd9Sstevel@tonic-gate mp->b_datap->db_type = IRE_DB_TYPE; 10357c478bd9Sstevel@tonic-gate 10367c478bd9Sstevel@tonic-gate /* Put the IRE_DB_TYPE mblk last in the chain */ 10377c478bd9Sstevel@tonic-gate mp1 = mp->b_cont; 10387c478bd9Sstevel@tonic-gate if (mp1 != NULL) { 10397c478bd9Sstevel@tonic-gate mp->b_cont = NULL; 10407c478bd9Sstevel@tonic-gate linkb(mp1, mp); 10417c478bd9Sstevel@tonic-gate mp = mp1; 10427c478bd9Sstevel@tonic-gate } 10437c478bd9Sstevel@tonic-gate qreply(q, mp); 10447c478bd9Sstevel@tonic-gate } 10457c478bd9Sstevel@tonic-gate 10467c478bd9Sstevel@tonic-gate /* 10477c478bd9Sstevel@tonic-gate * Send a packet using the specified IRE. 10487c478bd9Sstevel@tonic-gate * If ire_src_addr_v6 is all zero then discard the IRE after 10497c478bd9Sstevel@tonic-gate * the packet has been sent. 10507c478bd9Sstevel@tonic-gate */ 10517c478bd9Sstevel@tonic-gate static void 10527c478bd9Sstevel@tonic-gate ire_send(queue_t *q, mblk_t *pkt, ire_t *ire) 10537c478bd9Sstevel@tonic-gate { 10547c478bd9Sstevel@tonic-gate mblk_t *ipsec_mp; 10557c478bd9Sstevel@tonic-gate boolean_t is_secure; 10567c478bd9Sstevel@tonic-gate uint_t ifindex; 10577c478bd9Sstevel@tonic-gate ill_t *ill; 1058*5597b60aSnordmark zoneid_t zoneid = ire->ire_zoneid; 10597c478bd9Sstevel@tonic-gate 10607c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 1061*5597b60aSnordmark ASSERT(!(ire->ire_type & IRE_LOCAL)); /* Has different ire_zoneid */ 10627c478bd9Sstevel@tonic-gate ipsec_mp = pkt; 10637c478bd9Sstevel@tonic-gate is_secure = (pkt->b_datap->db_type == M_CTL); 1064*5597b60aSnordmark if (is_secure) { 1065*5597b60aSnordmark ipsec_out_t *io; 1066*5597b60aSnordmark 10677c478bd9Sstevel@tonic-gate pkt = pkt->b_cont; 1068*5597b60aSnordmark io = (ipsec_out_t *)ipsec_mp->b_rptr; 1069*5597b60aSnordmark if (io->ipsec_out_type == IPSEC_OUT) 1070*5597b60aSnordmark zoneid = io->ipsec_out_zoneid; 1071*5597b60aSnordmark } 10727c478bd9Sstevel@tonic-gate 10737c478bd9Sstevel@tonic-gate /* If the packet originated externally then */ 10747c478bd9Sstevel@tonic-gate if (pkt->b_prev) { 10757c478bd9Sstevel@tonic-gate ire_refrele(ire); 10767c478bd9Sstevel@tonic-gate /* 10777c478bd9Sstevel@tonic-gate * Extract the ifindex from b_prev (set in ip_rput_noire). 10787c478bd9Sstevel@tonic-gate * Look up interface to see if it still exists (it could have 10797c478bd9Sstevel@tonic-gate * been unplumbed by the time the reply came back from ARP) 10807c478bd9Sstevel@tonic-gate */ 10817c478bd9Sstevel@tonic-gate ifindex = (uint_t)(uintptr_t)pkt->b_prev; 10827c478bd9Sstevel@tonic-gate ill = ill_lookup_on_ifindex(ifindex, B_FALSE, 10837c478bd9Sstevel@tonic-gate NULL, NULL, NULL, NULL); 10847c478bd9Sstevel@tonic-gate if (ill == NULL) { 10857c478bd9Sstevel@tonic-gate pkt->b_prev = NULL; 10867c478bd9Sstevel@tonic-gate pkt->b_next = NULL; 10877c478bd9Sstevel@tonic-gate freemsg(ipsec_mp); 10887c478bd9Sstevel@tonic-gate return; 10897c478bd9Sstevel@tonic-gate } 10907c478bd9Sstevel@tonic-gate q = ill->ill_rq; 10917c478bd9Sstevel@tonic-gate pkt->b_prev = NULL; 10927c478bd9Sstevel@tonic-gate /* 10937c478bd9Sstevel@tonic-gate * This packet has not gone through IPSEC processing 10947c478bd9Sstevel@tonic-gate * and hence we should not have any IPSEC message 10957c478bd9Sstevel@tonic-gate * prepended. 10967c478bd9Sstevel@tonic-gate */ 10977c478bd9Sstevel@tonic-gate ASSERT(ipsec_mp == pkt); 1098c793af95Ssangeeta put(q, pkt); 10997c478bd9Sstevel@tonic-gate ill_refrele(ill); 11007c478bd9Sstevel@tonic-gate } else if (pkt->b_next) { 11017c478bd9Sstevel@tonic-gate /* Packets from multicast router */ 11027c478bd9Sstevel@tonic-gate pkt->b_next = NULL; 11037c478bd9Sstevel@tonic-gate /* 11047c478bd9Sstevel@tonic-gate * We never get the IPSEC_OUT while forwarding the 11057c478bd9Sstevel@tonic-gate * packet for multicast router. 11067c478bd9Sstevel@tonic-gate */ 11077c478bd9Sstevel@tonic-gate ASSERT(ipsec_mp == pkt); 11087c478bd9Sstevel@tonic-gate ip_rput_forward(ire, (ipha_t *)pkt->b_rptr, ipsec_mp, NULL); 11097c478bd9Sstevel@tonic-gate ire_refrele(ire); 11107c478bd9Sstevel@tonic-gate } else { 11117c478bd9Sstevel@tonic-gate /* Locally originated packets */ 11127c478bd9Sstevel@tonic-gate boolean_t is_inaddr_any; 11137c478bd9Sstevel@tonic-gate ipha_t *ipha = (ipha_t *)pkt->b_rptr; 11147c478bd9Sstevel@tonic-gate 11157c478bd9Sstevel@tonic-gate /* 11167c478bd9Sstevel@tonic-gate * We need to do an ire_delete below for which 11177c478bd9Sstevel@tonic-gate * we need to make sure that the IRE will be 11187c478bd9Sstevel@tonic-gate * around even after calling ip_wput_ire - 11197c478bd9Sstevel@tonic-gate * which does ire_refrele. Otherwise somebody 11207c478bd9Sstevel@tonic-gate * could potentially delete this ire and hence 11217c478bd9Sstevel@tonic-gate * free this ire and we will be calling ire_delete 11227c478bd9Sstevel@tonic-gate * on a freed ire below. 11237c478bd9Sstevel@tonic-gate */ 11247c478bd9Sstevel@tonic-gate is_inaddr_any = (ire->ire_src_addr == INADDR_ANY); 11257c478bd9Sstevel@tonic-gate if (is_inaddr_any) { 11267c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 11277c478bd9Sstevel@tonic-gate } 11287c478bd9Sstevel@tonic-gate /* 11297c478bd9Sstevel@tonic-gate * If we were resolving a router we can not use the 11307c478bd9Sstevel@tonic-gate * routers IRE for sending the packet (since it would 11317c478bd9Sstevel@tonic-gate * violate the uniqness of the IP idents) thus we 11327c478bd9Sstevel@tonic-gate * make another pass through ip_wput to create the IRE_CACHE 11337c478bd9Sstevel@tonic-gate * for the destination. 11347c478bd9Sstevel@tonic-gate * When IRE_MARK_NOADD is set, ire_add() is not called. 11357c478bd9Sstevel@tonic-gate * Thus ip_wput() will never find a ire and result in an 11367c478bd9Sstevel@tonic-gate * infinite loop. Thus we check whether IRE_MARK_NOADD is 11377c478bd9Sstevel@tonic-gate * is set. This also implies that IRE_MARK_NOADD can only be 11387c478bd9Sstevel@tonic-gate * used to send packets to directly connected hosts. 11397c478bd9Sstevel@tonic-gate */ 11407c478bd9Sstevel@tonic-gate if (ipha->ipha_dst != ire->ire_addr && 11417c478bd9Sstevel@tonic-gate !(ire->ire_marks & IRE_MARK_NOADD)) { 11427c478bd9Sstevel@tonic-gate ire_refrele(ire); /* Held in ire_add */ 1143*5597b60aSnordmark if (CONN_Q(q)) { 1144*5597b60aSnordmark (void) ip_output(Q_TO_CONN(q), ipsec_mp, q, 1145*5597b60aSnordmark IRE_SEND); 1146*5597b60aSnordmark } else { 1147*5597b60aSnordmark (void) ip_output((void *)(uintptr_t)zoneid, 1148*5597b60aSnordmark ipsec_mp, q, IRE_SEND); 1149*5597b60aSnordmark } 11507c478bd9Sstevel@tonic-gate } else { 11517c478bd9Sstevel@tonic-gate if (is_secure) { 11527c478bd9Sstevel@tonic-gate ipsec_out_t *oi; 11537c478bd9Sstevel@tonic-gate ipha_t *ipha; 11547c478bd9Sstevel@tonic-gate 11557c478bd9Sstevel@tonic-gate oi = (ipsec_out_t *)ipsec_mp->b_rptr; 11567c478bd9Sstevel@tonic-gate ipha = (ipha_t *)ipsec_mp->b_cont->b_rptr; 11577c478bd9Sstevel@tonic-gate if (oi->ipsec_out_proc_begin) { 11587c478bd9Sstevel@tonic-gate /* 11597c478bd9Sstevel@tonic-gate * This is the case where 11607c478bd9Sstevel@tonic-gate * ip_wput_ipsec_out could not find 11617c478bd9Sstevel@tonic-gate * the IRE and recreated a new one. 11627c478bd9Sstevel@tonic-gate * As ip_wput_ipsec_out does ire 11637c478bd9Sstevel@tonic-gate * lookups, ire_refrele for the extra 11647c478bd9Sstevel@tonic-gate * bump in ire_add. 11657c478bd9Sstevel@tonic-gate */ 11667c478bd9Sstevel@tonic-gate ire_refrele(ire); 11677c478bd9Sstevel@tonic-gate ip_wput_ipsec_out(q, ipsec_mp, ipha, 11687c478bd9Sstevel@tonic-gate NULL, NULL); 11697c478bd9Sstevel@tonic-gate } else { 11707c478bd9Sstevel@tonic-gate /* 11717c478bd9Sstevel@tonic-gate * IRE_REFRELE will be done in 11727c478bd9Sstevel@tonic-gate * ip_wput_ire. 11737c478bd9Sstevel@tonic-gate */ 11747c478bd9Sstevel@tonic-gate ip_wput_ire(q, ipsec_mp, ire, NULL, 1175*5597b60aSnordmark IRE_SEND, zoneid); 11767c478bd9Sstevel@tonic-gate } 11777c478bd9Sstevel@tonic-gate } else { 11787c478bd9Sstevel@tonic-gate /* 11797c478bd9Sstevel@tonic-gate * IRE_REFRELE will be done in ip_wput_ire. 11807c478bd9Sstevel@tonic-gate */ 11817c478bd9Sstevel@tonic-gate ip_wput_ire(q, ipsec_mp, ire, NULL, 1182*5597b60aSnordmark IRE_SEND, zoneid); 11837c478bd9Sstevel@tonic-gate } 11847c478bd9Sstevel@tonic-gate } 11857c478bd9Sstevel@tonic-gate /* 11867c478bd9Sstevel@tonic-gate * Special code to support sending a single packet with 11877c478bd9Sstevel@tonic-gate * conn_unspec_src using an IRE which has no source address. 11887c478bd9Sstevel@tonic-gate * The IRE is deleted here after sending the packet to avoid 11897c478bd9Sstevel@tonic-gate * having other code trip on it. But before we delete the 11907c478bd9Sstevel@tonic-gate * ire, somebody could have looked up this ire. 11917c478bd9Sstevel@tonic-gate * We prevent returning/using this IRE by the upper layers 11927c478bd9Sstevel@tonic-gate * by making checks to NULL source address in other places 11937c478bd9Sstevel@tonic-gate * like e.g ip_ire_append, ip_ire_req and ip_bind_connected. 11947c478bd9Sstevel@tonic-gate * Though, this does not completely prevent other threads 11957c478bd9Sstevel@tonic-gate * from using this ire, this should not cause any problems. 11967c478bd9Sstevel@tonic-gate * 11977c478bd9Sstevel@tonic-gate * NOTE : We use is_inaddr_any instead of using ire_src_addr 11987c478bd9Sstevel@tonic-gate * because for the normal case i.e !is_inaddr_any, ire_refrele 11997c478bd9Sstevel@tonic-gate * above could have potentially freed the ire. 12007c478bd9Sstevel@tonic-gate */ 12017c478bd9Sstevel@tonic-gate if (is_inaddr_any) { 12027c478bd9Sstevel@tonic-gate /* 12037c478bd9Sstevel@tonic-gate * If this IRE has been deleted by another thread, then 12047c478bd9Sstevel@tonic-gate * ire_bucket won't be NULL, but ire_ptpn will be NULL. 12057c478bd9Sstevel@tonic-gate * Thus, ire_delete will do nothing. This check 12067c478bd9Sstevel@tonic-gate * guards against calling ire_delete when the IRE was 12077c478bd9Sstevel@tonic-gate * never inserted in the table, which is handled by 12087c478bd9Sstevel@tonic-gate * ire_delete as dropping another reference. 12097c478bd9Sstevel@tonic-gate */ 12107c478bd9Sstevel@tonic-gate if (ire->ire_bucket != NULL) { 12117c478bd9Sstevel@tonic-gate ip1dbg(("ire_send: delete IRE\n")); 12127c478bd9Sstevel@tonic-gate ire_delete(ire); 12137c478bd9Sstevel@tonic-gate } 12147c478bd9Sstevel@tonic-gate ire_refrele(ire); /* Held above */ 12157c478bd9Sstevel@tonic-gate } 12167c478bd9Sstevel@tonic-gate } 12177c478bd9Sstevel@tonic-gate } 12187c478bd9Sstevel@tonic-gate 12197c478bd9Sstevel@tonic-gate /* 12207c478bd9Sstevel@tonic-gate * Send a packet using the specified IRE. 12217c478bd9Sstevel@tonic-gate * If ire_src_addr_v6 is all zero then discard the IRE after 12227c478bd9Sstevel@tonic-gate * the packet has been sent. 12237c478bd9Sstevel@tonic-gate */ 12247c478bd9Sstevel@tonic-gate static void 12257c478bd9Sstevel@tonic-gate ire_send_v6(queue_t *q, mblk_t *pkt, ire_t *ire) 12267c478bd9Sstevel@tonic-gate { 12277c478bd9Sstevel@tonic-gate mblk_t *ipsec_mp; 12287c478bd9Sstevel@tonic-gate boolean_t secure; 12297c478bd9Sstevel@tonic-gate uint_t ifindex; 1230*5597b60aSnordmark zoneid_t zoneid = ire->ire_zoneid; 12317c478bd9Sstevel@tonic-gate 12327c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV6_VERSION); 1233*5597b60aSnordmark ASSERT(!(ire->ire_type & IRE_LOCAL)); /* Has different ire_zoneid */ 12347c478bd9Sstevel@tonic-gate if (pkt->b_datap->db_type == M_CTL) { 1235*5597b60aSnordmark ipsec_out_t *io; 1236*5597b60aSnordmark 12377c478bd9Sstevel@tonic-gate ipsec_mp = pkt; 12387c478bd9Sstevel@tonic-gate pkt = pkt->b_cont; 12397c478bd9Sstevel@tonic-gate secure = B_TRUE; 1240*5597b60aSnordmark io = (ipsec_out_t *)ipsec_mp->b_rptr; 1241*5597b60aSnordmark if (io->ipsec_out_type == IPSEC_OUT) 1242*5597b60aSnordmark zoneid = io->ipsec_out_zoneid; 12437c478bd9Sstevel@tonic-gate } else { 12447c478bd9Sstevel@tonic-gate ipsec_mp = pkt; 12457c478bd9Sstevel@tonic-gate secure = B_FALSE; 12467c478bd9Sstevel@tonic-gate } 12477c478bd9Sstevel@tonic-gate 12487c478bd9Sstevel@tonic-gate /* If the packet originated externally then */ 12497c478bd9Sstevel@tonic-gate if (pkt->b_prev) { 12507c478bd9Sstevel@tonic-gate ill_t *ill; 12517c478bd9Sstevel@tonic-gate /* 12527c478bd9Sstevel@tonic-gate * Extract the ifindex from b_prev (set in ip_rput_data_v6). 12537c478bd9Sstevel@tonic-gate * Look up interface to see if it still exists (it could have 12547c478bd9Sstevel@tonic-gate * been unplumbed by the time the reply came back from the 1255c793af95Ssangeeta * resolver). 12567c478bd9Sstevel@tonic-gate */ 12577c478bd9Sstevel@tonic-gate ifindex = (uint_t)(uintptr_t)pkt->b_prev; 12587c478bd9Sstevel@tonic-gate ill = ill_lookup_on_ifindex(ifindex, B_TRUE, 12597c478bd9Sstevel@tonic-gate NULL, NULL, NULL, NULL); 12607c478bd9Sstevel@tonic-gate if (ill == NULL) { 12617c478bd9Sstevel@tonic-gate pkt->b_prev = NULL; 12627c478bd9Sstevel@tonic-gate pkt->b_next = NULL; 12637c478bd9Sstevel@tonic-gate freemsg(ipsec_mp); 12647c478bd9Sstevel@tonic-gate ire_refrele(ire); /* Held in ire_add */ 12657c478bd9Sstevel@tonic-gate return; 12667c478bd9Sstevel@tonic-gate } 12677c478bd9Sstevel@tonic-gate q = ill->ill_rq; 12687c478bd9Sstevel@tonic-gate pkt->b_prev = NULL; 12697c478bd9Sstevel@tonic-gate /* 12707c478bd9Sstevel@tonic-gate * This packet has not gone through IPSEC processing 12717c478bd9Sstevel@tonic-gate * and hence we should not have any IPSEC message 12727c478bd9Sstevel@tonic-gate * prepended. 12737c478bd9Sstevel@tonic-gate */ 12747c478bd9Sstevel@tonic-gate ASSERT(ipsec_mp == pkt); 12757c478bd9Sstevel@tonic-gate put(q, pkt); 12767c478bd9Sstevel@tonic-gate ill_refrele(ill); 12777c478bd9Sstevel@tonic-gate } else if (pkt->b_next) { 12787c478bd9Sstevel@tonic-gate /* Packets from multicast router */ 12797c478bd9Sstevel@tonic-gate pkt->b_next = NULL; 12807c478bd9Sstevel@tonic-gate /* 12817c478bd9Sstevel@tonic-gate * We never get the IPSEC_OUT while forwarding the 12827c478bd9Sstevel@tonic-gate * packet for multicast router. 12837c478bd9Sstevel@tonic-gate */ 12847c478bd9Sstevel@tonic-gate ASSERT(ipsec_mp == pkt); 12857c478bd9Sstevel@tonic-gate /* 12867c478bd9Sstevel@tonic-gate * XXX TODO IPv6. 12877c478bd9Sstevel@tonic-gate */ 12887c478bd9Sstevel@tonic-gate freemsg(pkt); 12897c478bd9Sstevel@tonic-gate #ifdef XXX 12907c478bd9Sstevel@tonic-gate ip_rput_forward(ire, (ipha_t *)pkt->b_rptr, pkt, NULL); 12917c478bd9Sstevel@tonic-gate #endif 12927c478bd9Sstevel@tonic-gate } else { 12937c478bd9Sstevel@tonic-gate if (secure) { 12947c478bd9Sstevel@tonic-gate ipsec_out_t *oi; 12957c478bd9Sstevel@tonic-gate ip6_t *ip6h; 12967c478bd9Sstevel@tonic-gate 12977c478bd9Sstevel@tonic-gate oi = (ipsec_out_t *)ipsec_mp->b_rptr; 12987c478bd9Sstevel@tonic-gate ip6h = (ip6_t *)ipsec_mp->b_cont->b_rptr; 12997c478bd9Sstevel@tonic-gate if (oi->ipsec_out_proc_begin) { 13007c478bd9Sstevel@tonic-gate /* 13017c478bd9Sstevel@tonic-gate * This is the case where 13027c478bd9Sstevel@tonic-gate * ip_wput_ipsec_out could not find 13037c478bd9Sstevel@tonic-gate * the IRE and recreated a new one. 13047c478bd9Sstevel@tonic-gate */ 13057c478bd9Sstevel@tonic-gate ip_wput_ipsec_out_v6(q, ipsec_mp, ip6h, 13067c478bd9Sstevel@tonic-gate NULL, NULL); 13077c478bd9Sstevel@tonic-gate } else { 1308*5597b60aSnordmark if (CONN_Q(q)) { 1309*5597b60aSnordmark (void) ip_output_v6(Q_TO_CONN(q), 1310*5597b60aSnordmark ipsec_mp, q, IRE_SEND); 1311*5597b60aSnordmark } else { 1312*5597b60aSnordmark (void) ip_output_v6( 1313*5597b60aSnordmark (void *)(uintptr_t)zoneid, 1314*5597b60aSnordmark ipsec_mp, q, IRE_SEND); 1315*5597b60aSnordmark } 13167c478bd9Sstevel@tonic-gate } 13177c478bd9Sstevel@tonic-gate } else { 13187c478bd9Sstevel@tonic-gate /* 13197c478bd9Sstevel@tonic-gate * Send packets through ip_output_v6 so that any 13207c478bd9Sstevel@tonic-gate * ip6_info header can be processed again. 13217c478bd9Sstevel@tonic-gate */ 1322*5597b60aSnordmark if (CONN_Q(q)) { 13237c478bd9Sstevel@tonic-gate (void) ip_output_v6(Q_TO_CONN(q), ipsec_mp, q, 13247c478bd9Sstevel@tonic-gate IRE_SEND); 1325*5597b60aSnordmark } else { 1326*5597b60aSnordmark (void) ip_output_v6((void *)(uintptr_t)zoneid, 1327*5597b60aSnordmark ipsec_mp, q, IRE_SEND); 1328*5597b60aSnordmark } 13297c478bd9Sstevel@tonic-gate } 13307c478bd9Sstevel@tonic-gate /* 13317c478bd9Sstevel@tonic-gate * Special code to support sending a single packet with 13327c478bd9Sstevel@tonic-gate * conn_unspec_src using an IRE which has no source address. 13337c478bd9Sstevel@tonic-gate * The IRE is deleted here after sending the packet to avoid 13347c478bd9Sstevel@tonic-gate * having other code trip on it. But before we delete the 13357c478bd9Sstevel@tonic-gate * ire, somebody could have looked up this ire. 13367c478bd9Sstevel@tonic-gate * We prevent returning/using this IRE by the upper layers 13377c478bd9Sstevel@tonic-gate * by making checks to NULL source address in other places 13387c478bd9Sstevel@tonic-gate * like e.g ip_ire_append_v6, ip_ire_req and 13397c478bd9Sstevel@tonic-gate * ip_bind_connected_v6. Though, this does not completely 13407c478bd9Sstevel@tonic-gate * prevent other threads from using this ire, this should 13417c478bd9Sstevel@tonic-gate * not cause any problems. 13427c478bd9Sstevel@tonic-gate */ 13437c478bd9Sstevel@tonic-gate if (IN6_IS_ADDR_UNSPECIFIED(&ire->ire_src_addr_v6)) { 13447c478bd9Sstevel@tonic-gate ip1dbg(("ire_send_v6: delete IRE\n")); 13457c478bd9Sstevel@tonic-gate ire_delete(ire); 13467c478bd9Sstevel@tonic-gate } 13477c478bd9Sstevel@tonic-gate } 13487c478bd9Sstevel@tonic-gate ire_refrele(ire); /* Held in ire_add */ 13497c478bd9Sstevel@tonic-gate } 13507c478bd9Sstevel@tonic-gate 13517c478bd9Sstevel@tonic-gate /* 13527c478bd9Sstevel@tonic-gate * Make sure that IRE bucket does not get too long. 13537c478bd9Sstevel@tonic-gate * This can cause lock up because ire_cache_lookup() 13547c478bd9Sstevel@tonic-gate * may take "forever" to finish. 13557c478bd9Sstevel@tonic-gate * 13567c478bd9Sstevel@tonic-gate * We just remove cnt IREs each time. This means that 13577c478bd9Sstevel@tonic-gate * the bucket length will stay approximately constant, 13587c478bd9Sstevel@tonic-gate * depending on cnt. This should be enough to defend 13597c478bd9Sstevel@tonic-gate * against DoS attack based on creating temporary IREs 13607c478bd9Sstevel@tonic-gate * (for forwarding and non-TCP traffic). 13617c478bd9Sstevel@tonic-gate * 13627c478bd9Sstevel@tonic-gate * Note that new IRE is normally added at the tail of the 13637c478bd9Sstevel@tonic-gate * bucket. This means that we are removing the "oldest" 13647c478bd9Sstevel@tonic-gate * temporary IRE added. Only if there are IREs with 13657c478bd9Sstevel@tonic-gate * the same ire_addr, do we not add it at the tail. Refer 13667c478bd9Sstevel@tonic-gate * to ire_add_v*(). It should be OK for our purpose. 13677c478bd9Sstevel@tonic-gate * 13687c478bd9Sstevel@tonic-gate * For non-temporary cached IREs, we make sure that they 13697c478bd9Sstevel@tonic-gate * have not been used for some time (defined below), they 13707c478bd9Sstevel@tonic-gate * are non-local destinations, and there is no one using 13717c478bd9Sstevel@tonic-gate * them at the moment (refcnt == 1). 13727c478bd9Sstevel@tonic-gate * 13737c478bd9Sstevel@tonic-gate * The above means that the IRE bucket length may become 13747c478bd9Sstevel@tonic-gate * very long, consisting of mostly non-temporary IREs. 13757c478bd9Sstevel@tonic-gate * This can happen when the hash function does a bad job 13767c478bd9Sstevel@tonic-gate * so that most TCP connections cluster to a specific bucket. 13777c478bd9Sstevel@tonic-gate * This "hopefully" should never happen. It can also 13787c478bd9Sstevel@tonic-gate * happen if most TCP connections have very long lives. 13797c478bd9Sstevel@tonic-gate * Even with the minimal hash table size of 256, there 13807c478bd9Sstevel@tonic-gate * has to be a lot of such connections to make the bucket 13817c478bd9Sstevel@tonic-gate * length unreasonably long. This should probably not 13827c478bd9Sstevel@tonic-gate * happen either. The third can when this can happen is 13837c478bd9Sstevel@tonic-gate * when the machine is under attack, such as SYN flooding. 13847c478bd9Sstevel@tonic-gate * TCP should already have the proper mechanism to protect 13857c478bd9Sstevel@tonic-gate * that. So we should be safe. 13867c478bd9Sstevel@tonic-gate * 13877c478bd9Sstevel@tonic-gate * This function is called by ire_add_then_send() after 13887c478bd9Sstevel@tonic-gate * a new IRE is added and the packet is sent. 13897c478bd9Sstevel@tonic-gate * 13907c478bd9Sstevel@tonic-gate * The idle cutoff interval is set to 60s. It can be 13917c478bd9Sstevel@tonic-gate * changed using /etc/system. 13927c478bd9Sstevel@tonic-gate */ 13937c478bd9Sstevel@tonic-gate uint32_t ire_idle_cutoff_interval = 60000; 13947c478bd9Sstevel@tonic-gate 13957c478bd9Sstevel@tonic-gate static void 13967c478bd9Sstevel@tonic-gate ire_cache_cleanup(irb_t *irb, uint32_t threshold, int cnt) 13977c478bd9Sstevel@tonic-gate { 13987c478bd9Sstevel@tonic-gate ire_t *ire; 13997c478bd9Sstevel@tonic-gate int tmp_cnt = cnt; 14007c478bd9Sstevel@tonic-gate clock_t cut_off = drv_usectohz(ire_idle_cutoff_interval * 1000); 14017c478bd9Sstevel@tonic-gate 14027c478bd9Sstevel@tonic-gate /* 14037c478bd9Sstevel@tonic-gate * irb is NULL if the IRE is not added to the hash. This 14047c478bd9Sstevel@tonic-gate * happens when IRE_MARK_NOADD is set in ire_add_then_send() 14057c478bd9Sstevel@tonic-gate * and when ires are returned from ire_update_srcif_v4() routine. 14067c478bd9Sstevel@tonic-gate */ 14077c478bd9Sstevel@tonic-gate if (irb == NULL) 14087c478bd9Sstevel@tonic-gate return; 14097c478bd9Sstevel@tonic-gate 14107c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 14117c478bd9Sstevel@tonic-gate if (irb->irb_tmp_ire_cnt > threshold) { 14127c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL && tmp_cnt > 0; 14137c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 14147c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_CONDEMNED) 14157c478bd9Sstevel@tonic-gate continue; 14167c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_TEMPORARY) { 14177c478bd9Sstevel@tonic-gate ASSERT(ire->ire_type == IRE_CACHE); 14187c478bd9Sstevel@tonic-gate ire_delete(ire); 14197c478bd9Sstevel@tonic-gate tmp_cnt--; 14207c478bd9Sstevel@tonic-gate } 14217c478bd9Sstevel@tonic-gate } 14227c478bd9Sstevel@tonic-gate } 14237c478bd9Sstevel@tonic-gate if (irb->irb_ire_cnt - irb->irb_tmp_ire_cnt > threshold) { 14247c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL && cnt > 0; 14257c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 14267c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_CONDEMNED || 14277c478bd9Sstevel@tonic-gate ire->ire_gateway_addr == 0) { 14287c478bd9Sstevel@tonic-gate continue; 14297c478bd9Sstevel@tonic-gate } 14307c478bd9Sstevel@tonic-gate if ((ire->ire_type == IRE_CACHE) && 14317c478bd9Sstevel@tonic-gate (lbolt - ire->ire_last_used_time > cut_off) && 14327c478bd9Sstevel@tonic-gate (ire->ire_refcnt == 1)) { 14337c478bd9Sstevel@tonic-gate ire_delete(ire); 14347c478bd9Sstevel@tonic-gate cnt--; 14357c478bd9Sstevel@tonic-gate } 14367c478bd9Sstevel@tonic-gate } 14377c478bd9Sstevel@tonic-gate } 14387c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 14397c478bd9Sstevel@tonic-gate } 14407c478bd9Sstevel@tonic-gate 14417c478bd9Sstevel@tonic-gate /* 14427c478bd9Sstevel@tonic-gate * ire_add_then_send is called when a new IRE has been created in order to 14437c478bd9Sstevel@tonic-gate * route an outgoing packet. Typically, it is called from ip_wput when 14447c478bd9Sstevel@tonic-gate * a response comes back down from a resolver. We add the IRE, and then 14457c478bd9Sstevel@tonic-gate * possibly run the packet through ip_wput or ip_rput, as appropriate. 14467c478bd9Sstevel@tonic-gate * However, we do not add the newly created IRE in the cache when 14477c478bd9Sstevel@tonic-gate * IRE_MARK_NOADD is set in the IRE. IRE_MARK_NOADD is set at 14487c478bd9Sstevel@tonic-gate * ip_newroute_ipif(). The ires with IRE_MARK_NOADD and ires returned 14497c478bd9Sstevel@tonic-gate * by ire_update_srcif_v4() are ire_refrele'd by ip_wput_ire() and get 14507c478bd9Sstevel@tonic-gate * deleted. 14517c478bd9Sstevel@tonic-gate * Multirouting support: the packet is silently discarded when the new IRE 14527c478bd9Sstevel@tonic-gate * holds the RTF_MULTIRT flag, but is not the first IRE to be added with the 14537c478bd9Sstevel@tonic-gate * RTF_MULTIRT flag for the same destination address. 14547c478bd9Sstevel@tonic-gate * In this case, we just want to register this additional ire without 14557c478bd9Sstevel@tonic-gate * sending the packet, as it has already been replicated through 14567c478bd9Sstevel@tonic-gate * existing multirt routes in ip_wput(). 14577c478bd9Sstevel@tonic-gate */ 14587c478bd9Sstevel@tonic-gate void 14597c478bd9Sstevel@tonic-gate ire_add_then_send(queue_t *q, ire_t *ire, mblk_t *mp) 14607c478bd9Sstevel@tonic-gate { 14617c478bd9Sstevel@tonic-gate irb_t *irb; 14627c478bd9Sstevel@tonic-gate boolean_t drop = B_FALSE; 14637c478bd9Sstevel@tonic-gate /* LINTED : set but not used in function */ 14647c478bd9Sstevel@tonic-gate boolean_t mctl_present; 14657c478bd9Sstevel@tonic-gate mblk_t *first_mp = NULL; 14667c478bd9Sstevel@tonic-gate mblk_t *save_mp = NULL; 14677c478bd9Sstevel@tonic-gate ire_t *dst_ire; 14687c478bd9Sstevel@tonic-gate ipha_t *ipha; 14697c478bd9Sstevel@tonic-gate ip6_t *ip6h; 14707c478bd9Sstevel@tonic-gate 14717c478bd9Sstevel@tonic-gate if (mp != NULL) { 14727c478bd9Sstevel@tonic-gate /* 14737c478bd9Sstevel@tonic-gate * We first have to retrieve the destination address carried 14747c478bd9Sstevel@tonic-gate * by the packet. 14757c478bd9Sstevel@tonic-gate * We can't rely on ire as it can be related to a gateway. 14767c478bd9Sstevel@tonic-gate * The destination address will help in determining if 14777c478bd9Sstevel@tonic-gate * other RTF_MULTIRT ires are already registered. 14787c478bd9Sstevel@tonic-gate * 14797c478bd9Sstevel@tonic-gate * We first need to know where we are going : v4 or V6. 14807c478bd9Sstevel@tonic-gate * the ire version is enough, as there is no risk that 14817c478bd9Sstevel@tonic-gate * we resolve an IPv6 address with an IPv4 ire 14827c478bd9Sstevel@tonic-gate * or vice versa. 14837c478bd9Sstevel@tonic-gate */ 14847c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 14857c478bd9Sstevel@tonic-gate EXTRACT_PKT_MP(mp, first_mp, mctl_present); 14867c478bd9Sstevel@tonic-gate ipha = (ipha_t *)mp->b_rptr; 14877c478bd9Sstevel@tonic-gate save_mp = mp; 14887c478bd9Sstevel@tonic-gate mp = first_mp; 14897c478bd9Sstevel@tonic-gate 14907c478bd9Sstevel@tonic-gate dst_ire = ire_cache_lookup(ipha->ipha_dst, 149145916cd2Sjpk ire->ire_zoneid, MBLK_GETLABEL(mp)); 14927c478bd9Sstevel@tonic-gate } else { 1493c793af95Ssangeeta ASSERT(ire->ire_ipversion == IPV6_VERSION); 14947c478bd9Sstevel@tonic-gate /* 14957c478bd9Sstevel@tonic-gate * Get a pointer to the beginning of the IPv6 header. 14967c478bd9Sstevel@tonic-gate * Ignore leading IPsec control mblks. 14977c478bd9Sstevel@tonic-gate */ 14987c478bd9Sstevel@tonic-gate first_mp = mp; 14997c478bd9Sstevel@tonic-gate if (mp->b_datap->db_type == M_CTL) { 15007c478bd9Sstevel@tonic-gate mp = mp->b_cont; 15017c478bd9Sstevel@tonic-gate } 15027c478bd9Sstevel@tonic-gate ip6h = (ip6_t *)mp->b_rptr; 15037c478bd9Sstevel@tonic-gate save_mp = mp; 15047c478bd9Sstevel@tonic-gate mp = first_mp; 15057c478bd9Sstevel@tonic-gate dst_ire = ire_cache_lookup_v6(&ip6h->ip6_dst, 150645916cd2Sjpk ire->ire_zoneid, MBLK_GETLABEL(mp)); 15077c478bd9Sstevel@tonic-gate } 15087c478bd9Sstevel@tonic-gate if (dst_ire != NULL) { 15097c478bd9Sstevel@tonic-gate if (dst_ire->ire_flags & RTF_MULTIRT) { 15107c478bd9Sstevel@tonic-gate /* 15117c478bd9Sstevel@tonic-gate * At least one resolved multirt route 15127c478bd9Sstevel@tonic-gate * already exists for the destination, 15137c478bd9Sstevel@tonic-gate * don't sent this packet: either drop it 15147c478bd9Sstevel@tonic-gate * or complete the pending resolution, 15157c478bd9Sstevel@tonic-gate * depending on the ire. 15167c478bd9Sstevel@tonic-gate */ 15177c478bd9Sstevel@tonic-gate drop = B_TRUE; 15187c478bd9Sstevel@tonic-gate } 15197c478bd9Sstevel@tonic-gate ip1dbg(("ire_add_then_send: dst_ire %p " 15207c478bd9Sstevel@tonic-gate "[dst %08x, gw %08x], drop %d\n", 15217c478bd9Sstevel@tonic-gate (void *)dst_ire, 15227c478bd9Sstevel@tonic-gate (dst_ire->ire_ipversion == IPV4_VERSION) ? \ 15237c478bd9Sstevel@tonic-gate ntohl(dst_ire->ire_addr) : \ 15247c478bd9Sstevel@tonic-gate ntohl(V4_PART_OF_V6(dst_ire->ire_addr_v6)), 15257c478bd9Sstevel@tonic-gate (dst_ire->ire_ipversion == IPV4_VERSION) ? \ 15267c478bd9Sstevel@tonic-gate ntohl(dst_ire->ire_gateway_addr) : \ 15277c478bd9Sstevel@tonic-gate ntohl(V4_PART_OF_V6( 15287c478bd9Sstevel@tonic-gate dst_ire->ire_gateway_addr_v6)), 15297c478bd9Sstevel@tonic-gate drop)); 15307c478bd9Sstevel@tonic-gate ire_refrele(dst_ire); 15317c478bd9Sstevel@tonic-gate } 15327c478bd9Sstevel@tonic-gate } 15337c478bd9Sstevel@tonic-gate 15347c478bd9Sstevel@tonic-gate if (!(ire->ire_marks & IRE_MARK_NOADD)) { 15357c478bd9Sstevel@tonic-gate /* 15367c478bd9Sstevel@tonic-gate * Regular packets with cache bound ires and 15377c478bd9Sstevel@tonic-gate * the packets from ARP response for ires which 15387c478bd9Sstevel@tonic-gate * belong to the ire_srcif_v4 table, are here. 15397c478bd9Sstevel@tonic-gate */ 15407c478bd9Sstevel@tonic-gate if (ire->ire_in_ill == NULL) { 15417c478bd9Sstevel@tonic-gate /* Add the ire */ 1542c793af95Ssangeeta (void) ire_add(&ire, NULL, NULL, NULL, B_FALSE); 15437c478bd9Sstevel@tonic-gate } else { 15447c478bd9Sstevel@tonic-gate /* 15457c478bd9Sstevel@tonic-gate * This must be ARP response for ire in interface based 15467c478bd9Sstevel@tonic-gate * table. Note that we don't add them in cache table, 15477c478bd9Sstevel@tonic-gate * instead we update the existing table with dlureq_mp 15487c478bd9Sstevel@tonic-gate * information. The reverse tunnel ires do not come 15497c478bd9Sstevel@tonic-gate * here, as reverse tunnel is non-resolver interface. 15507c478bd9Sstevel@tonic-gate * XXX- another design alternative was to mark the 15517c478bd9Sstevel@tonic-gate * ires in interface based table with a special mark to 15527c478bd9Sstevel@tonic-gate * make absolutely sure that we operate in right ires. 15537c478bd9Sstevel@tonic-gate * This idea was not implemented as part of code review 15547c478bd9Sstevel@tonic-gate * suggestion, as ire_in_ill suffice to distinguish 15557c478bd9Sstevel@tonic-gate * between the regular ires and interface based 15567c478bd9Sstevel@tonic-gate * ires now and thus we save a bit in the ire_marks. 15577c478bd9Sstevel@tonic-gate */ 15587c478bd9Sstevel@tonic-gate ire = ire_update_srcif_v4(ire); 15597c478bd9Sstevel@tonic-gate } 15607c478bd9Sstevel@tonic-gate 15617c478bd9Sstevel@tonic-gate if (ire == NULL) { 15627c478bd9Sstevel@tonic-gate mp->b_prev = NULL; 15637c478bd9Sstevel@tonic-gate mp->b_next = NULL; 15647c478bd9Sstevel@tonic-gate MULTIRT_DEBUG_UNTAG(mp); 15657c478bd9Sstevel@tonic-gate freemsg(mp); 15667c478bd9Sstevel@tonic-gate return; 15677c478bd9Sstevel@tonic-gate } 15687c478bd9Sstevel@tonic-gate if (mp == NULL) { 15697c478bd9Sstevel@tonic-gate ire_refrele(ire); /* Held in ire_add_v4/v6 */ 15707c478bd9Sstevel@tonic-gate return; 15717c478bd9Sstevel@tonic-gate } 15727c478bd9Sstevel@tonic-gate } 15737c478bd9Sstevel@tonic-gate if (drop) { 15747c478bd9Sstevel@tonic-gate /* 15757c478bd9Sstevel@tonic-gate * If we're adding an RTF_MULTIRT ire, the resolution 15767c478bd9Sstevel@tonic-gate * is over: we just drop the packet. 15777c478bd9Sstevel@tonic-gate */ 15787c478bd9Sstevel@tonic-gate if (ire->ire_flags & RTF_MULTIRT) { 15797c478bd9Sstevel@tonic-gate if (save_mp) { 15807c478bd9Sstevel@tonic-gate save_mp->b_prev = NULL; 15817c478bd9Sstevel@tonic-gate save_mp->b_next = NULL; 15827c478bd9Sstevel@tonic-gate } 15837c478bd9Sstevel@tonic-gate MULTIRT_DEBUG_UNTAG(mp); 15847c478bd9Sstevel@tonic-gate freemsg(mp); 15857c478bd9Sstevel@tonic-gate } else { 15867c478bd9Sstevel@tonic-gate /* 15877c478bd9Sstevel@tonic-gate * Otherwise, we're adding the ire to a gateway 15887c478bd9Sstevel@tonic-gate * for a multirt route. 15897c478bd9Sstevel@tonic-gate * Invoke ip_newroute() to complete the resolution 15907c478bd9Sstevel@tonic-gate * of the route. We will then come back here and 15917c478bd9Sstevel@tonic-gate * finally drop this packet in the above code. 15927c478bd9Sstevel@tonic-gate */ 15937c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 15947c478bd9Sstevel@tonic-gate /* 15957c478bd9Sstevel@tonic-gate * TODO: in order for CGTP to work in non-global 15967c478bd9Sstevel@tonic-gate * zones, ip_newroute() must create the IRE 15977c478bd9Sstevel@tonic-gate * cache in the zone indicated by 15987c478bd9Sstevel@tonic-gate * ire->ire_zoneid. 15997c478bd9Sstevel@tonic-gate */ 16007c478bd9Sstevel@tonic-gate ip_newroute(q, mp, ipha->ipha_dst, 0, 1601*5597b60aSnordmark (CONN_Q(q) ? Q_TO_CONN(q) : NULL), 1602*5597b60aSnordmark ire->ire_zoneid); 16037c478bd9Sstevel@tonic-gate } else { 1604c793af95Ssangeeta ASSERT(ire->ire_ipversion == IPV6_VERSION); 16057c478bd9Sstevel@tonic-gate ip_newroute_v6(q, mp, &ip6h->ip6_dst, NULL, 16067c478bd9Sstevel@tonic-gate NULL, ire->ire_zoneid); 16077c478bd9Sstevel@tonic-gate } 16087c478bd9Sstevel@tonic-gate } 16097c478bd9Sstevel@tonic-gate 16107c478bd9Sstevel@tonic-gate ire_refrele(ire); /* As done by ire_send(). */ 16117c478bd9Sstevel@tonic-gate return; 16127c478bd9Sstevel@tonic-gate } 16137c478bd9Sstevel@tonic-gate /* 16147c478bd9Sstevel@tonic-gate * Need to remember ire_bucket here as ire_send*() may delete 16157c478bd9Sstevel@tonic-gate * the ire so we cannot reference it after that. 16167c478bd9Sstevel@tonic-gate */ 16177c478bd9Sstevel@tonic-gate irb = ire->ire_bucket; 16187c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 16197c478bd9Sstevel@tonic-gate ire_send_v6(q, mp, ire); 16207c478bd9Sstevel@tonic-gate /* 16217c478bd9Sstevel@tonic-gate * Clean up more than 1 IRE so that the clean up does not 16227c478bd9Sstevel@tonic-gate * need to be done every time when a new IRE is added and 16237c478bd9Sstevel@tonic-gate * the threshold is reached. 16247c478bd9Sstevel@tonic-gate */ 16257c478bd9Sstevel@tonic-gate ire_cache_cleanup(irb, ip6_ire_max_bucket_cnt, 2); 16267c478bd9Sstevel@tonic-gate } else { 16277c478bd9Sstevel@tonic-gate ire_send(q, mp, ire); 16287c478bd9Sstevel@tonic-gate ire_cache_cleanup(irb, ip_ire_max_bucket_cnt, 2); 16297c478bd9Sstevel@tonic-gate } 16307c478bd9Sstevel@tonic-gate } 16317c478bd9Sstevel@tonic-gate 16327c478bd9Sstevel@tonic-gate /* 16337c478bd9Sstevel@tonic-gate * Initialize the ire that is specific to IPv4 part and call 16347c478bd9Sstevel@tonic-gate * ire_init_common to finish it. 16357c478bd9Sstevel@tonic-gate */ 16367c478bd9Sstevel@tonic-gate ire_t * 16377c478bd9Sstevel@tonic-gate ire_init(ire_t *ire, uchar_t *addr, uchar_t *mask, uchar_t *src_addr, 16387c478bd9Sstevel@tonic-gate uchar_t *gateway, uchar_t *in_src_addr, uint_t *max_fragp, mblk_t *fp_mp, 16397c478bd9Sstevel@tonic-gate queue_t *rfq, queue_t *stq, ushort_t type, mblk_t *dlureq_mp, ipif_t *ipif, 16407c478bd9Sstevel@tonic-gate ill_t *in_ill, ipaddr_t cmask, uint32_t phandle, uint32_t ihandle, 164145916cd2Sjpk uint32_t flags, const iulp_t *ulp_info, tsol_gc_t *gc, tsol_gcgrp_t *gcgrp) 16427c478bd9Sstevel@tonic-gate { 164345916cd2Sjpk /* 164445916cd2Sjpk * Reject IRE security attribute creation/initialization 164545916cd2Sjpk * if system is not running in Trusted mode. 164645916cd2Sjpk */ 164745916cd2Sjpk if ((gc != NULL || gcgrp != NULL) && !is_system_labeled()) 164845916cd2Sjpk return (NULL); 164945916cd2Sjpk 16507c478bd9Sstevel@tonic-gate if (fp_mp != NULL) { 16517c478bd9Sstevel@tonic-gate /* 16527c478bd9Sstevel@tonic-gate * We can't dupb() here as multiple threads could be 16537c478bd9Sstevel@tonic-gate * calling dupb on the same mp which is incorrect. 16547c478bd9Sstevel@tonic-gate * First dupb() should be called only by one thread. 16557c478bd9Sstevel@tonic-gate */ 16567c478bd9Sstevel@tonic-gate fp_mp = copyb(fp_mp); 16577c478bd9Sstevel@tonic-gate if (fp_mp == NULL) 16587c478bd9Sstevel@tonic-gate return (NULL); 16597c478bd9Sstevel@tonic-gate } 16607c478bd9Sstevel@tonic-gate 16617c478bd9Sstevel@tonic-gate if (dlureq_mp != NULL) { 16627c478bd9Sstevel@tonic-gate /* 16637c478bd9Sstevel@tonic-gate * We can't dupb() here as multiple threads could be 16647c478bd9Sstevel@tonic-gate * calling dupb on the same mp which is incorrect. 16657c478bd9Sstevel@tonic-gate * First dupb() should be called only by one thread. 16667c478bd9Sstevel@tonic-gate */ 16677c478bd9Sstevel@tonic-gate dlureq_mp = copyb(dlureq_mp); 16687c478bd9Sstevel@tonic-gate if (dlureq_mp == NULL) { 16697c478bd9Sstevel@tonic-gate if (fp_mp != NULL) 16707c478bd9Sstevel@tonic-gate freeb(fp_mp); 16717c478bd9Sstevel@tonic-gate return (NULL); 16727c478bd9Sstevel@tonic-gate } 16737c478bd9Sstevel@tonic-gate } 16747c478bd9Sstevel@tonic-gate 16757c478bd9Sstevel@tonic-gate /* 16767c478bd9Sstevel@tonic-gate * Check that IRE_IF_RESOLVER and IRE_IF_NORESOLVER have a 16777c478bd9Sstevel@tonic-gate * dlureq_mp which is the ill_resolver_mp for IRE_IF_RESOLVER 16787c478bd9Sstevel@tonic-gate * and DL_UNITDATA_REQ for IRE_IF_NORESOLVER. 16797c478bd9Sstevel@tonic-gate */ 16807c478bd9Sstevel@tonic-gate if ((type & IRE_INTERFACE) && 16817c478bd9Sstevel@tonic-gate dlureq_mp == NULL) { 16827c478bd9Sstevel@tonic-gate ASSERT(fp_mp == NULL); 16837c478bd9Sstevel@tonic-gate ip0dbg(("ire_init: no dlureq_mp\n")); 16847c478bd9Sstevel@tonic-gate return (NULL); 16857c478bd9Sstevel@tonic-gate } 16867c478bd9Sstevel@tonic-gate 16877c478bd9Sstevel@tonic-gate BUMP_IRE_STATS(ire_stats_v4, ire_stats_alloced); 16887c478bd9Sstevel@tonic-gate 16897c478bd9Sstevel@tonic-gate if (addr != NULL) 16907c478bd9Sstevel@tonic-gate bcopy(addr, &ire->ire_addr, IP_ADDR_LEN); 16917c478bd9Sstevel@tonic-gate if (src_addr != NULL) 16927c478bd9Sstevel@tonic-gate bcopy(src_addr, &ire->ire_src_addr, IP_ADDR_LEN); 16937c478bd9Sstevel@tonic-gate if (mask != NULL) { 16947c478bd9Sstevel@tonic-gate bcopy(mask, &ire->ire_mask, IP_ADDR_LEN); 16957c478bd9Sstevel@tonic-gate ire->ire_masklen = ip_mask_to_plen(ire->ire_mask); 16967c478bd9Sstevel@tonic-gate } 16977c478bd9Sstevel@tonic-gate if (gateway != NULL) { 16987c478bd9Sstevel@tonic-gate bcopy(gateway, &ire->ire_gateway_addr, IP_ADDR_LEN); 16997c478bd9Sstevel@tonic-gate } 17007c478bd9Sstevel@tonic-gate if (in_src_addr != NULL) { 17017c478bd9Sstevel@tonic-gate bcopy(in_src_addr, &ire->ire_in_src_addr, IP_ADDR_LEN); 17027c478bd9Sstevel@tonic-gate } 17037c478bd9Sstevel@tonic-gate 17047c478bd9Sstevel@tonic-gate if (type == IRE_CACHE) 17057c478bd9Sstevel@tonic-gate ire->ire_cmask = cmask; 17067c478bd9Sstevel@tonic-gate 170745916cd2Sjpk /* ire_init_common will free the mblks upon encountering any failure */ 170845916cd2Sjpk if (!ire_init_common(ire, max_fragp, fp_mp, rfq, stq, type, dlureq_mp, 170945916cd2Sjpk ipif, in_ill, phandle, ihandle, flags, IPV4_VERSION, ulp_info, 171045916cd2Sjpk gc, gcgrp)) 171145916cd2Sjpk return (NULL); 17127c478bd9Sstevel@tonic-gate 17137c478bd9Sstevel@tonic-gate return (ire); 17147c478bd9Sstevel@tonic-gate } 17157c478bd9Sstevel@tonic-gate 17167c478bd9Sstevel@tonic-gate /* 17177c478bd9Sstevel@tonic-gate * Similar to ire_create except that it is called only when 17187c478bd9Sstevel@tonic-gate * we want to allocate ire as an mblk e.g. we have an external 17197c478bd9Sstevel@tonic-gate * resolver ARP. 17207c478bd9Sstevel@tonic-gate */ 17217c478bd9Sstevel@tonic-gate ire_t * 17227c478bd9Sstevel@tonic-gate ire_create_mp(uchar_t *addr, uchar_t *mask, uchar_t *src_addr, uchar_t *gateway, 17237c478bd9Sstevel@tonic-gate uchar_t *in_src_addr, uint_t max_frag, mblk_t *fp_mp, queue_t *rfq, 17247c478bd9Sstevel@tonic-gate queue_t *stq, ushort_t type, mblk_t *dlureq_mp, ipif_t *ipif, ill_t *in_ill, 17257c478bd9Sstevel@tonic-gate ipaddr_t cmask, uint32_t phandle, uint32_t ihandle, uint32_t flags, 172645916cd2Sjpk const iulp_t *ulp_info, tsol_gc_t *gc, tsol_gcgrp_t *gcgrp) 17277c478bd9Sstevel@tonic-gate { 1728c793af95Ssangeeta ire_t *ire, *buf; 17297c478bd9Sstevel@tonic-gate ire_t *ret_ire; 17307c478bd9Sstevel@tonic-gate mblk_t *mp; 1731c793af95Ssangeeta size_t bufsize; 1732c793af95Ssangeeta frtn_t *frtnp; 1733c793af95Ssangeeta ill_t *ill; 17347c478bd9Sstevel@tonic-gate 1735c793af95Ssangeeta bufsize = sizeof (ire_t) + sizeof (frtn_t); 1736c793af95Ssangeeta buf = kmem_alloc(bufsize, KM_NOSLEEP); 1737c793af95Ssangeeta if (buf == NULL) { 17387c478bd9Sstevel@tonic-gate ip1dbg(("ire_create_mp: alloc failed\n")); 17397c478bd9Sstevel@tonic-gate return (NULL); 17407c478bd9Sstevel@tonic-gate } 1741c793af95Ssangeeta frtnp = (frtn_t *)(buf + 1); 1742c793af95Ssangeeta frtnp->free_arg = (caddr_t)buf; 1743c793af95Ssangeeta frtnp->free_func = ire_freemblk; 17447c478bd9Sstevel@tonic-gate 1745c793af95Ssangeeta /* 1746c793af95Ssangeeta * Allocate the new IRE. The ire created will hold a ref on 1747c793af95Ssangeeta * an nce_t after ire_nce_init, and this ref must either be 1748c793af95Ssangeeta * (a) transferred to the ire_cache entry created when ire_add_v4 1749c793af95Ssangeeta * is called after successful arp resolution, or, 1750c793af95Ssangeeta * (b) released, when arp resolution fails 1751c793af95Ssangeeta * Case (b) is handled in ire_freemblk() which will be called 1752c793af95Ssangeeta * when mp is freed as a result of failed arp. 1753c793af95Ssangeeta */ 1754c793af95Ssangeeta mp = esballoc((unsigned char *)buf, bufsize, BPRI_MED, frtnp); 1755c793af95Ssangeeta if (mp == NULL) { 1756c793af95Ssangeeta ip1dbg(("ire_create_mp: alloc failed\n")); 1757c793af95Ssangeeta kmem_free(buf, bufsize); 1758c793af95Ssangeeta return (NULL); 1759c793af95Ssangeeta } 17607c478bd9Sstevel@tonic-gate ire = (ire_t *)mp->b_rptr; 17617c478bd9Sstevel@tonic-gate mp->b_wptr = (uchar_t *)&ire[1]; 17627c478bd9Sstevel@tonic-gate 17637c478bd9Sstevel@tonic-gate /* Start clean. */ 17647c478bd9Sstevel@tonic-gate *ire = ire_null; 17657c478bd9Sstevel@tonic-gate ire->ire_mp = mp; 17667c478bd9Sstevel@tonic-gate mp->b_datap->db_type = IRE_DB_TYPE; 1767c793af95Ssangeeta ire->ire_marks |= IRE_MARK_UNCACHED; 17687c478bd9Sstevel@tonic-gate 17697c478bd9Sstevel@tonic-gate ret_ire = ire_init(ire, addr, mask, src_addr, gateway, in_src_addr, 17707c478bd9Sstevel@tonic-gate NULL, fp_mp, rfq, stq, type, dlureq_mp, ipif, in_ill, cmask, 177145916cd2Sjpk phandle, ihandle, flags, ulp_info, gc, gcgrp); 17727c478bd9Sstevel@tonic-gate 17737c478bd9Sstevel@tonic-gate if (ret_ire == NULL) { 17747c478bd9Sstevel@tonic-gate freeb(ire->ire_mp); 17757c478bd9Sstevel@tonic-gate return (NULL); 17767c478bd9Sstevel@tonic-gate } 1777c793af95Ssangeeta ill = ire_to_ill(ret_ire); 1778c793af95Ssangeeta ret_ire->ire_stq_ifindex = ill->ill_phyint->phyint_ifindex; 17797c478bd9Sstevel@tonic-gate ASSERT(ret_ire == ire); 17807c478bd9Sstevel@tonic-gate /* 17817c478bd9Sstevel@tonic-gate * ire_max_frag is normally zero here and is atomically set 17827c478bd9Sstevel@tonic-gate * under the irebucket lock in ire_add_v[46] except for the 17837c478bd9Sstevel@tonic-gate * case of IRE_MARK_NOADD. In that event the the ire_max_frag 17847c478bd9Sstevel@tonic-gate * is non-zero here. 17857c478bd9Sstevel@tonic-gate */ 17867c478bd9Sstevel@tonic-gate ire->ire_max_frag = max_frag; 17877c478bd9Sstevel@tonic-gate return (ire); 17887c478bd9Sstevel@tonic-gate } 17897c478bd9Sstevel@tonic-gate 17907c478bd9Sstevel@tonic-gate /* 17917c478bd9Sstevel@tonic-gate * ire_create is called to allocate and initialize a new IRE. 17927c478bd9Sstevel@tonic-gate * 17937c478bd9Sstevel@tonic-gate * NOTE : This is called as writer sometimes though not required 17947c478bd9Sstevel@tonic-gate * by this function. 17957c478bd9Sstevel@tonic-gate */ 17967c478bd9Sstevel@tonic-gate ire_t * 17977c478bd9Sstevel@tonic-gate ire_create(uchar_t *addr, uchar_t *mask, uchar_t *src_addr, uchar_t *gateway, 17987c478bd9Sstevel@tonic-gate uchar_t *in_src_addr, uint_t *max_fragp, mblk_t *fp_mp, queue_t *rfq, 17997c478bd9Sstevel@tonic-gate queue_t *stq, ushort_t type, mblk_t *dlureq_mp, ipif_t *ipif, ill_t *in_ill, 18007c478bd9Sstevel@tonic-gate ipaddr_t cmask, uint32_t phandle, uint32_t ihandle, uint32_t flags, 180145916cd2Sjpk const iulp_t *ulp_info, tsol_gc_t *gc, tsol_gcgrp_t *gcgrp) 18027c478bd9Sstevel@tonic-gate { 18037c478bd9Sstevel@tonic-gate ire_t *ire; 18047c478bd9Sstevel@tonic-gate ire_t *ret_ire; 18057c478bd9Sstevel@tonic-gate 18067c478bd9Sstevel@tonic-gate ire = kmem_cache_alloc(ire_cache, KM_NOSLEEP); 18077c478bd9Sstevel@tonic-gate if (ire == NULL) { 18087c478bd9Sstevel@tonic-gate ip1dbg(("ire_create: alloc failed\n")); 18097c478bd9Sstevel@tonic-gate return (NULL); 18107c478bd9Sstevel@tonic-gate } 18117c478bd9Sstevel@tonic-gate *ire = ire_null; 18127c478bd9Sstevel@tonic-gate 18137c478bd9Sstevel@tonic-gate ret_ire = ire_init(ire, addr, mask, src_addr, gateway, in_src_addr, 18147c478bd9Sstevel@tonic-gate max_fragp, fp_mp, rfq, stq, type, dlureq_mp, ipif, in_ill, cmask, 181545916cd2Sjpk phandle, ihandle, flags, ulp_info, gc, gcgrp); 18167c478bd9Sstevel@tonic-gate 18177c478bd9Sstevel@tonic-gate if (ret_ire == NULL) { 18187c478bd9Sstevel@tonic-gate kmem_cache_free(ire_cache, ire); 18197c478bd9Sstevel@tonic-gate return (NULL); 18207c478bd9Sstevel@tonic-gate } 18217c478bd9Sstevel@tonic-gate ASSERT(ret_ire == ire); 18227c478bd9Sstevel@tonic-gate return (ire); 18237c478bd9Sstevel@tonic-gate } 18247c478bd9Sstevel@tonic-gate 18257c478bd9Sstevel@tonic-gate 18267c478bd9Sstevel@tonic-gate /* 18277c478bd9Sstevel@tonic-gate * Common to IPv4 and IPv6 18287c478bd9Sstevel@tonic-gate */ 182945916cd2Sjpk boolean_t 18307c478bd9Sstevel@tonic-gate ire_init_common(ire_t *ire, uint_t *max_fragp, mblk_t *fp_mp, 18317c478bd9Sstevel@tonic-gate queue_t *rfq, queue_t *stq, ushort_t type, 18327c478bd9Sstevel@tonic-gate mblk_t *dlureq_mp, ipif_t *ipif, ill_t *in_ill, uint32_t phandle, 18337c478bd9Sstevel@tonic-gate uint32_t ihandle, uint32_t flags, uchar_t ipversion, 183445916cd2Sjpk const iulp_t *ulp_info, tsol_gc_t *gc, tsol_gcgrp_t *gcgrp) 18357c478bd9Sstevel@tonic-gate { 18367c478bd9Sstevel@tonic-gate ire->ire_max_fragp = max_fragp; 18377c478bd9Sstevel@tonic-gate ire->ire_frag_flag |= (ip_path_mtu_discovery) ? IPH_DF : 0; 18387c478bd9Sstevel@tonic-gate 18397c478bd9Sstevel@tonic-gate ASSERT(fp_mp == NULL || fp_mp->b_datap->db_type == M_DATA); 184045916cd2Sjpk #ifdef DEBUG 184145916cd2Sjpk if (ipif != NULL) { 18427c478bd9Sstevel@tonic-gate if (ipif->ipif_isv6) 18437c478bd9Sstevel@tonic-gate ASSERT(ipversion == IPV6_VERSION); 18447c478bd9Sstevel@tonic-gate else 18457c478bd9Sstevel@tonic-gate ASSERT(ipversion == IPV4_VERSION); 18467c478bd9Sstevel@tonic-gate } 184745916cd2Sjpk #endif /* DEBUG */ 184845916cd2Sjpk 184945916cd2Sjpk /* 185045916cd2Sjpk * Create/initialize IRE security attribute only in Trusted mode; 185145916cd2Sjpk * if the passed in gc/gcgrp is non-NULL, we expect that the caller 185245916cd2Sjpk * has held a reference to it and will release it when this routine 185345916cd2Sjpk * returns a failure, otherwise we own the reference. We do this 185445916cd2Sjpk * prior to initializing the rest IRE fields. 1855dc3879f9Sjarrett * 1856dc3879f9Sjarrett * Don't allocate ire_gw_secattr for the resolver case to prevent 1857dc3879f9Sjarrett * memory leak (in case of external resolution failure). We'll 1858dc3879f9Sjarrett * allocate it after a successful external resolution, in ire_add(). 1859dc3879f9Sjarrett * Note that ire->ire_mp != NULL here means this ire is headed 1860dc3879f9Sjarrett * to an external resolver. 186145916cd2Sjpk */ 186245916cd2Sjpk if (is_system_labeled()) { 186345916cd2Sjpk if ((type & (IRE_LOCAL | IRE_LOOPBACK | IRE_BROADCAST | 186445916cd2Sjpk IRE_INTERFACE)) != 0) { 186545916cd2Sjpk /* release references on behalf of caller */ 186645916cd2Sjpk if (gc != NULL) 186745916cd2Sjpk GC_REFRELE(gc); 186845916cd2Sjpk if (gcgrp != NULL) 186945916cd2Sjpk GCGRP_REFRELE(gcgrp); 1870dc3879f9Sjarrett } else if ((ire->ire_mp == NULL) && 1871dc3879f9Sjarrett tsol_ire_init_gwattr(ire, ipversion, gc, gcgrp) != 0) { 187245916cd2Sjpk /* free any caller-allocated mblks upon failure */ 187345916cd2Sjpk if (fp_mp != NULL) 187445916cd2Sjpk freeb(fp_mp); 187545916cd2Sjpk if (dlureq_mp != NULL) 187645916cd2Sjpk freeb(dlureq_mp); 187745916cd2Sjpk return (B_FALSE); 187845916cd2Sjpk } 187945916cd2Sjpk } 18807c478bd9Sstevel@tonic-gate 18817c478bd9Sstevel@tonic-gate ire->ire_stq = stq; 18827c478bd9Sstevel@tonic-gate ire->ire_rfq = rfq; 18837c478bd9Sstevel@tonic-gate ire->ire_type = type; 18847c478bd9Sstevel@tonic-gate ire->ire_flags = RTF_UP | flags; 18857c478bd9Sstevel@tonic-gate ire->ire_ident = TICK_TO_MSEC(lbolt); 18867c478bd9Sstevel@tonic-gate bcopy(ulp_info, &ire->ire_uinfo, sizeof (iulp_t)); 18877c478bd9Sstevel@tonic-gate 18887c478bd9Sstevel@tonic-gate ire->ire_tire_mark = ire->ire_ob_pkt_count + ire->ire_ib_pkt_count; 18897c478bd9Sstevel@tonic-gate ire->ire_last_used_time = lbolt; 18907c478bd9Sstevel@tonic-gate ire->ire_create_time = (uint32_t)gethrestime_sec(); 18917c478bd9Sstevel@tonic-gate 18927c478bd9Sstevel@tonic-gate /* 18937c478bd9Sstevel@tonic-gate * If this IRE is an IRE_CACHE, inherit the handles from the 18947c478bd9Sstevel@tonic-gate * parent IREs. For others in the forwarding table, assign appropriate 18957c478bd9Sstevel@tonic-gate * new ones. 18967c478bd9Sstevel@tonic-gate * 18977c478bd9Sstevel@tonic-gate * The mutex protecting ire_handle is because ire_create is not always 18987c478bd9Sstevel@tonic-gate * called as a writer. 18997c478bd9Sstevel@tonic-gate */ 19007c478bd9Sstevel@tonic-gate if (ire->ire_type & IRE_OFFSUBNET) { 19017c478bd9Sstevel@tonic-gate mutex_enter(&ire_handle_lock); 19027c478bd9Sstevel@tonic-gate ire->ire_phandle = (uint32_t)ire_handle++; 19037c478bd9Sstevel@tonic-gate mutex_exit(&ire_handle_lock); 19047c478bd9Sstevel@tonic-gate } else if (ire->ire_type & IRE_INTERFACE) { 19057c478bd9Sstevel@tonic-gate mutex_enter(&ire_handle_lock); 19067c478bd9Sstevel@tonic-gate ire->ire_ihandle = (uint32_t)ire_handle++; 19077c478bd9Sstevel@tonic-gate mutex_exit(&ire_handle_lock); 19087c478bd9Sstevel@tonic-gate } else if (ire->ire_type == IRE_CACHE) { 19097c478bd9Sstevel@tonic-gate ire->ire_phandle = phandle; 19107c478bd9Sstevel@tonic-gate ire->ire_ihandle = ihandle; 19117c478bd9Sstevel@tonic-gate } 19127c478bd9Sstevel@tonic-gate ire->ire_in_ill = in_ill; 19137c478bd9Sstevel@tonic-gate ire->ire_ipif = ipif; 19147c478bd9Sstevel@tonic-gate if (ipif != NULL) { 19157c478bd9Sstevel@tonic-gate ire->ire_ipif_seqid = ipif->ipif_seqid; 19167c478bd9Sstevel@tonic-gate ire->ire_zoneid = ipif->ipif_zoneid; 19177c478bd9Sstevel@tonic-gate } else { 19187c478bd9Sstevel@tonic-gate ire->ire_zoneid = GLOBAL_ZONEID; 19197c478bd9Sstevel@tonic-gate } 19207c478bd9Sstevel@tonic-gate ire->ire_ipversion = ipversion; 19217c478bd9Sstevel@tonic-gate mutex_init(&ire->ire_lock, NULL, MUTEX_DEFAULT, NULL); 1922c793af95Ssangeeta if (ipversion == IPV4_VERSION) { 1923c793af95Ssangeeta if (ire_nce_init(ire, fp_mp, dlureq_mp) != 0) { 1924c793af95Ssangeeta /* some failure occurred. propagate error back */ 1925c793af95Ssangeeta return (B_FALSE); 1926c793af95Ssangeeta } 1927c793af95Ssangeeta } else { 1928c793af95Ssangeeta ASSERT(ipversion == IPV6_VERSION); 1929c793af95Ssangeeta /* 1930c793af95Ssangeeta * IPv6 initializes the ire_nce in ire_add_v6, 1931c793af95Ssangeeta * which expects to find the ire_nce to be null when 1932c793af95Ssangeeta * when it is called. 1933c793af95Ssangeeta */ 1934c793af95Ssangeeta if (dlureq_mp) 1935c793af95Ssangeeta freemsg(dlureq_mp); 1936c793af95Ssangeeta if (fp_mp) 1937c793af95Ssangeeta freemsg(fp_mp); 1938c793af95Ssangeeta } 1939c793af95Ssangeeta ire->ire_refcnt = 1; 19407c478bd9Sstevel@tonic-gate 19417c478bd9Sstevel@tonic-gate #ifdef IRE_DEBUG 19427c478bd9Sstevel@tonic-gate bzero(ire->ire_trace, sizeof (th_trace_t *) * IP_TR_HASH_MAX); 19437c478bd9Sstevel@tonic-gate #endif 194445916cd2Sjpk 194545916cd2Sjpk return (B_TRUE); 19467c478bd9Sstevel@tonic-gate } 19477c478bd9Sstevel@tonic-gate 19487c478bd9Sstevel@tonic-gate /* 19497c478bd9Sstevel@tonic-gate * This routine is called repeatedly by ipif_up to create broadcast IREs. 19507c478bd9Sstevel@tonic-gate * It is passed a pointer to a slot in an IRE pointer array into which to 19517c478bd9Sstevel@tonic-gate * place the pointer to the new IRE, if indeed we create one. If the 19527c478bd9Sstevel@tonic-gate * IRE corresponding to the address passed in would be a duplicate of an 19537c478bd9Sstevel@tonic-gate * existing one, we don't create the new one. irep is incremented before 19547c478bd9Sstevel@tonic-gate * return only if we do create a new IRE. (Always called as writer.) 19557c478bd9Sstevel@tonic-gate * 19567c478bd9Sstevel@tonic-gate * Note that with the "match_flags" parameter, we can match on either 19577c478bd9Sstevel@tonic-gate * a particular logical interface (MATCH_IRE_IPIF) or for all logical 19587c478bd9Sstevel@tonic-gate * interfaces for a given physical interface (MATCH_IRE_ILL). Currently, 19597c478bd9Sstevel@tonic-gate * we only create broadcast ire's on a per physical interface basis. If 19607c478bd9Sstevel@tonic-gate * someone is going to be mucking with logical interfaces, it is important 19617c478bd9Sstevel@tonic-gate * to call "ipif_check_bcast_ires()" to make sure that any change to a 19627c478bd9Sstevel@tonic-gate * logical interface will not cause critical broadcast IRE's to be deleted. 19637c478bd9Sstevel@tonic-gate */ 19647c478bd9Sstevel@tonic-gate ire_t ** 19657c478bd9Sstevel@tonic-gate ire_check_and_create_bcast(ipif_t *ipif, ipaddr_t addr, ire_t **irep, 19667c478bd9Sstevel@tonic-gate int match_flags) 19677c478bd9Sstevel@tonic-gate { 19687c478bd9Sstevel@tonic-gate ire_t *ire; 19697c478bd9Sstevel@tonic-gate uint64_t check_flags = IPIF_DEPRECATED | IPIF_NOLOCAL | IPIF_ANYCAST; 19707c478bd9Sstevel@tonic-gate 19717c478bd9Sstevel@tonic-gate /* 19727c478bd9Sstevel@tonic-gate * No broadcast IREs for the LOOPBACK interface 19737c478bd9Sstevel@tonic-gate * or others such as point to point and IPIF_NOXMIT. 19747c478bd9Sstevel@tonic-gate */ 19757c478bd9Sstevel@tonic-gate if (!(ipif->ipif_flags & IPIF_BROADCAST) || 19767c478bd9Sstevel@tonic-gate (ipif->ipif_flags & IPIF_NOXMIT)) 19777c478bd9Sstevel@tonic-gate return (irep); 19787c478bd9Sstevel@tonic-gate 19797c478bd9Sstevel@tonic-gate /* If this would be a duplicate, don't bother. */ 19807c478bd9Sstevel@tonic-gate if ((ire = ire_ctable_lookup(addr, 0, IRE_BROADCAST, ipif, 198145916cd2Sjpk ipif->ipif_zoneid, NULL, match_flags)) != NULL) { 19827c478bd9Sstevel@tonic-gate /* 19837c478bd9Sstevel@tonic-gate * We look for non-deprecated (and non-anycast, non-nolocal) 19847c478bd9Sstevel@tonic-gate * ipifs as the best choice. ipifs with check_flags matching 19857c478bd9Sstevel@tonic-gate * (deprecated, etc) are used only if non-deprecated ipifs 19867c478bd9Sstevel@tonic-gate * are not available. if the existing ire's ipif is deprecated 19877c478bd9Sstevel@tonic-gate * and the new ipif is non-deprecated, switch to the new ipif 19887c478bd9Sstevel@tonic-gate */ 19897c478bd9Sstevel@tonic-gate if ((!(ire->ire_ipif->ipif_flags & check_flags)) || 19907c478bd9Sstevel@tonic-gate (ipif->ipif_flags & check_flags)) { 19917c478bd9Sstevel@tonic-gate ire_refrele(ire); 19927c478bd9Sstevel@tonic-gate return (irep); 19937c478bd9Sstevel@tonic-gate } 19947c478bd9Sstevel@tonic-gate /* 19957c478bd9Sstevel@tonic-gate * Bcast ires exist in pairs. Both have to be deleted, 19967c478bd9Sstevel@tonic-gate * Since we are exclusive we can make the above assertion. 19977c478bd9Sstevel@tonic-gate * The 1st has to be refrele'd since it was ctable_lookup'd. 19987c478bd9Sstevel@tonic-gate */ 19997c478bd9Sstevel@tonic-gate ASSERT(IAM_WRITER_IPIF(ipif)); 20007c478bd9Sstevel@tonic-gate ASSERT(ire->ire_next->ire_addr == ire->ire_addr); 20017c478bd9Sstevel@tonic-gate ire_delete(ire->ire_next); 20027c478bd9Sstevel@tonic-gate ire_delete(ire); 20037c478bd9Sstevel@tonic-gate ire_refrele(ire); 20047c478bd9Sstevel@tonic-gate } 20057c478bd9Sstevel@tonic-gate 20067c478bd9Sstevel@tonic-gate irep = ire_create_bcast(ipif, addr, irep); 20077c478bd9Sstevel@tonic-gate 20087c478bd9Sstevel@tonic-gate return (irep); 20097c478bd9Sstevel@tonic-gate } 20107c478bd9Sstevel@tonic-gate 20117c478bd9Sstevel@tonic-gate uint_t ip_loopback_mtu = IP_LOOPBACK_MTU; 20127c478bd9Sstevel@tonic-gate 20137c478bd9Sstevel@tonic-gate /* 20147c478bd9Sstevel@tonic-gate * This routine is called from ipif_check_bcast_ires and ire_check_bcast. 20157c478bd9Sstevel@tonic-gate * It leaves all the verifying and deleting to those routines. So it always 20167c478bd9Sstevel@tonic-gate * creates 2 bcast ires and chains them into the ire array passed in. 20177c478bd9Sstevel@tonic-gate */ 20187c478bd9Sstevel@tonic-gate ire_t ** 20197c478bd9Sstevel@tonic-gate ire_create_bcast(ipif_t *ipif, ipaddr_t addr, ire_t **irep) 20207c478bd9Sstevel@tonic-gate { 20217c478bd9Sstevel@tonic-gate *irep++ = ire_create( 20227c478bd9Sstevel@tonic-gate (uchar_t *)&addr, /* dest addr */ 20237c478bd9Sstevel@tonic-gate (uchar_t *)&ip_g_all_ones, /* mask */ 20247c478bd9Sstevel@tonic-gate (uchar_t *)&ipif->ipif_src_addr, /* source addr */ 20257c478bd9Sstevel@tonic-gate NULL, /* no gateway */ 20267c478bd9Sstevel@tonic-gate NULL, /* no in_src_addr */ 20277c478bd9Sstevel@tonic-gate &ipif->ipif_mtu, /* max frag */ 20287c478bd9Sstevel@tonic-gate NULL, /* fast path header */ 20297c478bd9Sstevel@tonic-gate ipif->ipif_rq, /* recv-from queue */ 20307c478bd9Sstevel@tonic-gate ipif->ipif_wq, /* send-to queue */ 20317c478bd9Sstevel@tonic-gate IRE_BROADCAST, 20327c478bd9Sstevel@tonic-gate ipif->ipif_bcast_mp, /* xmit header */ 20337c478bd9Sstevel@tonic-gate ipif, 20347c478bd9Sstevel@tonic-gate NULL, 20357c478bd9Sstevel@tonic-gate 0, 20367c478bd9Sstevel@tonic-gate 0, 20377c478bd9Sstevel@tonic-gate 0, 20387c478bd9Sstevel@tonic-gate 0, 203945916cd2Sjpk &ire_uinfo_null, 204045916cd2Sjpk NULL, 204145916cd2Sjpk NULL); 20427c478bd9Sstevel@tonic-gate 20437c478bd9Sstevel@tonic-gate *irep++ = ire_create( 20447c478bd9Sstevel@tonic-gate (uchar_t *)&addr, /* dest address */ 20457c478bd9Sstevel@tonic-gate (uchar_t *)&ip_g_all_ones, /* mask */ 20467c478bd9Sstevel@tonic-gate (uchar_t *)&ipif->ipif_src_addr, /* source address */ 20477c478bd9Sstevel@tonic-gate NULL, /* no gateway */ 20487c478bd9Sstevel@tonic-gate NULL, /* no in_src_addr */ 20497c478bd9Sstevel@tonic-gate &ip_loopback_mtu, /* max frag size */ 20507c478bd9Sstevel@tonic-gate NULL, /* Fast Path header */ 20517c478bd9Sstevel@tonic-gate ipif->ipif_rq, /* recv-from queue */ 20527c478bd9Sstevel@tonic-gate NULL, /* no send-to queue */ 20537c478bd9Sstevel@tonic-gate IRE_BROADCAST, /* Needed for fanout in wput */ 20547c478bd9Sstevel@tonic-gate NULL, 20557c478bd9Sstevel@tonic-gate ipif, 20567c478bd9Sstevel@tonic-gate NULL, 20577c478bd9Sstevel@tonic-gate 0, 20587c478bd9Sstevel@tonic-gate 0, 20597c478bd9Sstevel@tonic-gate 0, 20607c478bd9Sstevel@tonic-gate 0, 206145916cd2Sjpk &ire_uinfo_null, 206245916cd2Sjpk NULL, 206345916cd2Sjpk NULL); 20647c478bd9Sstevel@tonic-gate 20657c478bd9Sstevel@tonic-gate return (irep); 20667c478bd9Sstevel@tonic-gate } 20677c478bd9Sstevel@tonic-gate 20687c478bd9Sstevel@tonic-gate /* 20697c478bd9Sstevel@tonic-gate * ire_walk routine to delete or update any IRE_CACHE that might contain 20707c478bd9Sstevel@tonic-gate * stale information. 20717c478bd9Sstevel@tonic-gate * The flags state which entries to delete or update. 20727c478bd9Sstevel@tonic-gate * Garbage collection is done separately using kmem alloc callbacks to 20737c478bd9Sstevel@tonic-gate * ip_trash_ire_reclaim. 20747c478bd9Sstevel@tonic-gate * Used for both IPv4 and IPv6. However, IPv6 only uses FLUSH_MTU_TIME 20757c478bd9Sstevel@tonic-gate * since other stale information is cleaned up using NUD. 20767c478bd9Sstevel@tonic-gate */ 20777c478bd9Sstevel@tonic-gate void 20787c478bd9Sstevel@tonic-gate ire_expire(ire_t *ire, char *arg) 20797c478bd9Sstevel@tonic-gate { 20807c478bd9Sstevel@tonic-gate int flush_flags = (int)(uintptr_t)arg; 20817c478bd9Sstevel@tonic-gate ill_t *stq_ill; 20827c478bd9Sstevel@tonic-gate 20837c478bd9Sstevel@tonic-gate if ((flush_flags & FLUSH_REDIRECT_TIME) && 20847c478bd9Sstevel@tonic-gate ire->ire_type == IRE_HOST_REDIRECT) { 20857c478bd9Sstevel@tonic-gate /* Make sure we delete the corresponding IRE_CACHE */ 20867c478bd9Sstevel@tonic-gate ip1dbg(("ire_expire: all redirects\n")); 20877c478bd9Sstevel@tonic-gate ip_rts_rtmsg(RTM_DELETE, ire, 0); 20887c478bd9Sstevel@tonic-gate ire_delete(ire); 2089c793af95Ssangeeta atomic_dec_32(&ip_redirect_cnt); 20907c478bd9Sstevel@tonic-gate return; 20917c478bd9Sstevel@tonic-gate } 20927c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) 20937c478bd9Sstevel@tonic-gate return; 20947c478bd9Sstevel@tonic-gate 20957c478bd9Sstevel@tonic-gate if (flush_flags & FLUSH_ARP_TIME) { 20967c478bd9Sstevel@tonic-gate /* 20977c478bd9Sstevel@tonic-gate * Remove all IRE_CACHE. 20987c478bd9Sstevel@tonic-gate * Verify that create time is more than 20997c478bd9Sstevel@tonic-gate * ip_ire_arp_interval milliseconds ago. 21007c478bd9Sstevel@tonic-gate */ 2101c793af95Ssangeeta if (NCE_EXPIRED(ire->ire_nce)) { 21027c478bd9Sstevel@tonic-gate ire_delete(ire); 21037c478bd9Sstevel@tonic-gate return; 21047c478bd9Sstevel@tonic-gate } 21057c478bd9Sstevel@tonic-gate } 21067c478bd9Sstevel@tonic-gate 21077c478bd9Sstevel@tonic-gate if (ip_path_mtu_discovery && (flush_flags & FLUSH_MTU_TIME) && 21087c478bd9Sstevel@tonic-gate (ire->ire_ipif != NULL)) { 21097c478bd9Sstevel@tonic-gate /* Increase pmtu if it is less than the interface mtu */ 21107c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 21117c478bd9Sstevel@tonic-gate /* 21127c478bd9Sstevel@tonic-gate * If the ipif is a vni (whose mtu is 0, since it's virtual) 21137c478bd9Sstevel@tonic-gate * get the mtu from the sending interfaces' ipif 21147c478bd9Sstevel@tonic-gate */ 21157c478bd9Sstevel@tonic-gate if (IS_VNI(ire->ire_ipif->ipif_ill)) { 21167c478bd9Sstevel@tonic-gate stq_ill = ire->ire_stq->q_ptr; 21177c478bd9Sstevel@tonic-gate ire->ire_max_frag = MIN(stq_ill->ill_ipif->ipif_mtu, 21187c478bd9Sstevel@tonic-gate IP_MAXPACKET); 21197c478bd9Sstevel@tonic-gate } else { 21207c478bd9Sstevel@tonic-gate ire->ire_max_frag = MIN(ire->ire_ipif->ipif_mtu, 21217c478bd9Sstevel@tonic-gate IP_MAXPACKET); 21227c478bd9Sstevel@tonic-gate } 21237c478bd9Sstevel@tonic-gate ire->ire_frag_flag |= IPH_DF; 21247c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 21257c478bd9Sstevel@tonic-gate } 21267c478bd9Sstevel@tonic-gate } 21277c478bd9Sstevel@tonic-gate 21287c478bd9Sstevel@tonic-gate /* 21297c478bd9Sstevel@tonic-gate * Do fast path probing if necessary. 21307c478bd9Sstevel@tonic-gate */ 2131c793af95Ssangeeta void 21327c478bd9Sstevel@tonic-gate ire_fastpath(ire_t *ire) 21337c478bd9Sstevel@tonic-gate { 21347c478bd9Sstevel@tonic-gate ill_t *ill; 21357c478bd9Sstevel@tonic-gate int res; 21367c478bd9Sstevel@tonic-gate 2137c793af95Ssangeeta if (ire->ire_nce == NULL || ire->ire_nce->nce_fp_mp != NULL || 2138c793af95Ssangeeta ire->ire_nce->nce_state != ND_REACHABLE || 2139c793af95Ssangeeta ire->ire_nce->nce_res_mp == NULL) { 2140c793af95Ssangeeta 21417c478bd9Sstevel@tonic-gate /* 21427c478bd9Sstevel@tonic-gate * Already contains fastpath info or 2143c793af95Ssangeeta * doesn't have DL_UNITDATA_REQ header or 2144c793af95Ssangeeta * or is an incomplete ire in the ire table 21457c478bd9Sstevel@tonic-gate * or is a loopback broadcast ire i.e. no stq. 21467c478bd9Sstevel@tonic-gate */ 21477c478bd9Sstevel@tonic-gate return; 21487c478bd9Sstevel@tonic-gate } 21497c478bd9Sstevel@tonic-gate ill = ire_to_ill(ire); 21507c478bd9Sstevel@tonic-gate if (ill == NULL) 21517c478bd9Sstevel@tonic-gate return; 21527c478bd9Sstevel@tonic-gate ire_fastpath_list_add(ill, ire); 2153c793af95Ssangeeta res = ill_fastpath_probe(ill, ire->ire_nce->nce_res_mp); 21547c478bd9Sstevel@tonic-gate /* 21557c478bd9Sstevel@tonic-gate * EAGAIN is an indication of a transient error 21567c478bd9Sstevel@tonic-gate * i.e. allocation failure etc. leave the ire in the list it will 21577c478bd9Sstevel@tonic-gate * be updated when another probe happens for another ire if not 21587c478bd9Sstevel@tonic-gate * it will be taken out of the list when the ire is deleted. 21597c478bd9Sstevel@tonic-gate */ 21607c478bd9Sstevel@tonic-gate if (res != 0 && res != EAGAIN) 21617c478bd9Sstevel@tonic-gate ire_fastpath_list_delete(ill, ire); 21627c478bd9Sstevel@tonic-gate } 21637c478bd9Sstevel@tonic-gate 21647c478bd9Sstevel@tonic-gate /* 21657c478bd9Sstevel@tonic-gate * Update all IRE's that are not in fastpath mode and 21667c478bd9Sstevel@tonic-gate * have an dlureq_mp that matches mp. mp->b_cont contains 21677c478bd9Sstevel@tonic-gate * the fastpath header. 21687c478bd9Sstevel@tonic-gate * 21697c478bd9Sstevel@tonic-gate * Returns TRUE if entry should be dequeued, or FALSE otherwise. 21707c478bd9Sstevel@tonic-gate */ 21717c478bd9Sstevel@tonic-gate boolean_t 21727c478bd9Sstevel@tonic-gate ire_fastpath_update(ire_t *ire, void *arg) 21737c478bd9Sstevel@tonic-gate { 21747c478bd9Sstevel@tonic-gate mblk_t *mp, *fp_mp; 21757c478bd9Sstevel@tonic-gate uchar_t *up, *up2; 21767c478bd9Sstevel@tonic-gate ptrdiff_t cmplen; 2177c793af95Ssangeeta nce_t *arpce; 21787c478bd9Sstevel@tonic-gate 21797c478bd9Sstevel@tonic-gate ASSERT((ire->ire_type & (IRE_CACHE | IRE_BROADCAST | 21807c478bd9Sstevel@tonic-gate IRE_MIPRTUN)) != 0); 21817c478bd9Sstevel@tonic-gate 21827c478bd9Sstevel@tonic-gate /* 21837c478bd9Sstevel@tonic-gate * Already contains fastpath info or doesn't have 2184c793af95Ssangeeta * DL_UNITDATA_REQ header or is an incomplete ire. 21857c478bd9Sstevel@tonic-gate */ 2186c793af95Ssangeeta if (ire->ire_nce == NULL || ire->ire_nce->nce_res_mp == NULL || 2187c793af95Ssangeeta ire->ire_nce->nce_fp_mp != NULL || 2188c793af95Ssangeeta ire->ire_nce->nce_state != ND_REACHABLE) 21897c478bd9Sstevel@tonic-gate return (B_TRUE); 21907c478bd9Sstevel@tonic-gate 21917c478bd9Sstevel@tonic-gate ip2dbg(("ire_fastpath_update: trying\n")); 2192c793af95Ssangeeta mp = arg; 21937c478bd9Sstevel@tonic-gate up = mp->b_rptr; 21947c478bd9Sstevel@tonic-gate cmplen = mp->b_wptr - up; 21957c478bd9Sstevel@tonic-gate /* Serialize multiple fast path updates */ 2196bad84ac4Ssangeeta mutex_enter(&ire->ire_nce->nce_lock); 2197c793af95Ssangeeta up2 = ire->ire_nce->nce_res_mp->b_rptr; 21987c478bd9Sstevel@tonic-gate ASSERT(cmplen >= 0); 2199c793af95Ssangeeta if (ire->ire_nce->nce_res_mp->b_wptr - up2 != cmplen || 22007c478bd9Sstevel@tonic-gate bcmp(up, up2, cmplen) != 0) { 2201bad84ac4Ssangeeta mutex_exit(&ire->ire_nce->nce_lock); 22027c478bd9Sstevel@tonic-gate /* 22037c478bd9Sstevel@tonic-gate * Don't take the ire off the fastpath list yet, 22047c478bd9Sstevel@tonic-gate * since the response may come later. 22057c478bd9Sstevel@tonic-gate */ 22067c478bd9Sstevel@tonic-gate return (B_FALSE); 22077c478bd9Sstevel@tonic-gate } 2208c793af95Ssangeeta arpce = ire->ire_nce; 2209c793af95Ssangeeta /* Matched - install mp as the nce_fp_mp */ 22107c478bd9Sstevel@tonic-gate ip1dbg(("ire_fastpath_update: match\n")); 22117c478bd9Sstevel@tonic-gate fp_mp = dupb(mp->b_cont); 22127c478bd9Sstevel@tonic-gate if (fp_mp) { 22137c478bd9Sstevel@tonic-gate /* 2214c793af95Ssangeeta * We checked nce_fp_mp above. Check it again with the 22157c478bd9Sstevel@tonic-gate * lock. Update fp_mp only if it has not been done 22167c478bd9Sstevel@tonic-gate * already. 22177c478bd9Sstevel@tonic-gate */ 2218c793af95Ssangeeta if (arpce->nce_fp_mp == NULL) { 22197c478bd9Sstevel@tonic-gate /* 22207c478bd9Sstevel@tonic-gate * ire_ll_hdr_length is just an optimization to 22217c478bd9Sstevel@tonic-gate * store the length. It is used to return the 22227c478bd9Sstevel@tonic-gate * fast path header length to the upper layers. 22237c478bd9Sstevel@tonic-gate */ 2224c793af95Ssangeeta arpce->nce_fp_mp = fp_mp; 22257c478bd9Sstevel@tonic-gate ire->ire_ll_hdr_length = 22267c478bd9Sstevel@tonic-gate (uint_t)(fp_mp->b_wptr - fp_mp->b_rptr); 22277c478bd9Sstevel@tonic-gate } else { 22287c478bd9Sstevel@tonic-gate freeb(fp_mp); 22297c478bd9Sstevel@tonic-gate } 22307c478bd9Sstevel@tonic-gate } 2231bad84ac4Ssangeeta mutex_exit(&ire->ire_nce->nce_lock); 22327c478bd9Sstevel@tonic-gate return (B_TRUE); 22337c478bd9Sstevel@tonic-gate } 22347c478bd9Sstevel@tonic-gate 22357c478bd9Sstevel@tonic-gate /* 22367c478bd9Sstevel@tonic-gate * This function handles the DL_NOTE_FASTPATH_FLUSH notification from the 22377c478bd9Sstevel@tonic-gate * driver. 22387c478bd9Sstevel@tonic-gate */ 22397c478bd9Sstevel@tonic-gate /* ARGSUSED */ 22407c478bd9Sstevel@tonic-gate void 22417c478bd9Sstevel@tonic-gate ire_fastpath_flush(ire_t *ire, void *arg) 22427c478bd9Sstevel@tonic-gate { 22437c478bd9Sstevel@tonic-gate ill_t *ill; 22447c478bd9Sstevel@tonic-gate int res; 22457c478bd9Sstevel@tonic-gate 22467c478bd9Sstevel@tonic-gate /* No fastpath info? */ 2247c793af95Ssangeeta if (ire->ire_nce == NULL || 2248c793af95Ssangeeta ire->ire_nce->nce_fp_mp == NULL || ire->ire_nce->nce_res_mp == NULL) 22497c478bd9Sstevel@tonic-gate return; 22507c478bd9Sstevel@tonic-gate 22517c478bd9Sstevel@tonic-gate /* 22527c478bd9Sstevel@tonic-gate * Just remove the IRE if it is for non-broadcast dest. Then 22537c478bd9Sstevel@tonic-gate * we will create another one which will have the correct 22547c478bd9Sstevel@tonic-gate * fastpath info. 22557c478bd9Sstevel@tonic-gate */ 22567c478bd9Sstevel@tonic-gate switch (ire->ire_type) { 22577c478bd9Sstevel@tonic-gate case IRE_CACHE: 22587c478bd9Sstevel@tonic-gate ire_delete(ire); 22597c478bd9Sstevel@tonic-gate break; 22607c478bd9Sstevel@tonic-gate case IRE_MIPRTUN: 22617c478bd9Sstevel@tonic-gate case IRE_BROADCAST: 22627c478bd9Sstevel@tonic-gate /* 22637c478bd9Sstevel@tonic-gate * We can't delete the ire since it is difficult to 22647c478bd9Sstevel@tonic-gate * recreate these ire's without going through the 2265c793af95Ssangeeta * ipif down/up dance. The nce_fp_mp is protected by the 2266c793af95Ssangeeta * nce_lock in the case of IRE_MIPRTUN and IRE_BROADCAST. 2267c793af95Ssangeeta * All access to ire->ire_nce->nce_fp_mp in the case of these 2268c793af95Ssangeeta * 2 ire types * is protected by nce_lock. 22697c478bd9Sstevel@tonic-gate */ 2270c793af95Ssangeeta mutex_enter(&ire->ire_nce->nce_lock); 2271c793af95Ssangeeta if (ire->ire_nce->nce_fp_mp != NULL) { 2272c793af95Ssangeeta freeb(ire->ire_nce->nce_fp_mp); 2273c793af95Ssangeeta ire->ire_nce->nce_fp_mp = NULL; 2274c793af95Ssangeeta mutex_exit(&ire->ire_nce->nce_lock); 22757c478bd9Sstevel@tonic-gate /* 22767c478bd9Sstevel@tonic-gate * No fastpath probe if there is no stq i.e. 22777c478bd9Sstevel@tonic-gate * i.e. the case of loopback broadcast ire. 22787c478bd9Sstevel@tonic-gate */ 22797c478bd9Sstevel@tonic-gate if (ire->ire_stq == NULL) 22807c478bd9Sstevel@tonic-gate break; 22817c478bd9Sstevel@tonic-gate ill = (ill_t *)((ire->ire_stq)->q_ptr); 22827c478bd9Sstevel@tonic-gate ire_fastpath_list_add(ill, ire); 2283c793af95Ssangeeta res = ill_fastpath_probe(ill, ire->ire_nce->nce_res_mp); 22847c478bd9Sstevel@tonic-gate /* 22857c478bd9Sstevel@tonic-gate * EAGAIN is an indication of a transient error 22867c478bd9Sstevel@tonic-gate * i.e. allocation failure etc. leave the ire in the 22877c478bd9Sstevel@tonic-gate * list it will be updated when another probe happens 22887c478bd9Sstevel@tonic-gate * for another ire if not it will be taken out of the 22897c478bd9Sstevel@tonic-gate * list when the ire is deleted. 22907c478bd9Sstevel@tonic-gate */ 22917c478bd9Sstevel@tonic-gate if (res != 0 && res != EAGAIN) 22927c478bd9Sstevel@tonic-gate ire_fastpath_list_delete(ill, ire); 22937c478bd9Sstevel@tonic-gate } else { 2294c793af95Ssangeeta mutex_exit(&ire->ire_nce->nce_lock); 22957c478bd9Sstevel@tonic-gate } 22967c478bd9Sstevel@tonic-gate break; 22977c478bd9Sstevel@tonic-gate default: 22987c478bd9Sstevel@tonic-gate /* This should not happen! */ 22997c478bd9Sstevel@tonic-gate ip0dbg(("ire_fastpath_flush: Wrong ire type %s\n", 23007c478bd9Sstevel@tonic-gate ip_nv_lookup(ire_nv_tbl, (int)ire->ire_type))); 23017c478bd9Sstevel@tonic-gate break; 23027c478bd9Sstevel@tonic-gate } 23037c478bd9Sstevel@tonic-gate } 23047c478bd9Sstevel@tonic-gate 23057c478bd9Sstevel@tonic-gate /* 23067c478bd9Sstevel@tonic-gate * Drain the list of ire's waiting for fastpath response. 23077c478bd9Sstevel@tonic-gate */ 23087c478bd9Sstevel@tonic-gate void 23097c478bd9Sstevel@tonic-gate ire_fastpath_list_dispatch(ill_t *ill, boolean_t (*func)(ire_t *, void *), 23107c478bd9Sstevel@tonic-gate void *arg) 23117c478bd9Sstevel@tonic-gate { 23127c478bd9Sstevel@tonic-gate ire_t *next_ire; 23137c478bd9Sstevel@tonic-gate ire_t *current_ire; 23147c478bd9Sstevel@tonic-gate ire_t *first_ire; 23157c478bd9Sstevel@tonic-gate ire_t *prev_ire = NULL; 23167c478bd9Sstevel@tonic-gate 23177c478bd9Sstevel@tonic-gate ASSERT(ill != NULL); 23187c478bd9Sstevel@tonic-gate 23197c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 23207c478bd9Sstevel@tonic-gate first_ire = current_ire = (ire_t *)ill->ill_fastpath_list; 23217c478bd9Sstevel@tonic-gate while (current_ire != (ire_t *)&ill->ill_fastpath_list) { 23227c478bd9Sstevel@tonic-gate next_ire = current_ire->ire_fastpath; 23237c478bd9Sstevel@tonic-gate /* 23247c478bd9Sstevel@tonic-gate * Take it off the list if we're flushing, or if the callback 23257c478bd9Sstevel@tonic-gate * routine tells us to do so. Otherwise, leave the ire in the 23267c478bd9Sstevel@tonic-gate * fastpath list to handle any pending response from the lower 23277c478bd9Sstevel@tonic-gate * layer. We can't drain the list when the callback routine 23287c478bd9Sstevel@tonic-gate * comparison failed, because the response is asynchronous in 23297c478bd9Sstevel@tonic-gate * nature, and may not arrive in the same order as the list 23307c478bd9Sstevel@tonic-gate * insertion. 23317c478bd9Sstevel@tonic-gate */ 23327c478bd9Sstevel@tonic-gate if (func == NULL || func(current_ire, arg)) { 23337c478bd9Sstevel@tonic-gate current_ire->ire_fastpath = NULL; 23347c478bd9Sstevel@tonic-gate if (current_ire == first_ire) 23357c478bd9Sstevel@tonic-gate ill->ill_fastpath_list = first_ire = next_ire; 23367c478bd9Sstevel@tonic-gate else 23377c478bd9Sstevel@tonic-gate prev_ire->ire_fastpath = next_ire; 23387c478bd9Sstevel@tonic-gate } else { 23397c478bd9Sstevel@tonic-gate /* previous element that is still in the list */ 23407c478bd9Sstevel@tonic-gate prev_ire = current_ire; 23417c478bd9Sstevel@tonic-gate } 23427c478bd9Sstevel@tonic-gate current_ire = next_ire; 23437c478bd9Sstevel@tonic-gate } 23447c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 23457c478bd9Sstevel@tonic-gate } 23467c478bd9Sstevel@tonic-gate 23477c478bd9Sstevel@tonic-gate /* 23487c478bd9Sstevel@tonic-gate * Add ire to the ire fastpath list. 23497c478bd9Sstevel@tonic-gate */ 23507c478bd9Sstevel@tonic-gate static void 23517c478bd9Sstevel@tonic-gate ire_fastpath_list_add(ill_t *ill, ire_t *ire) 23527c478bd9Sstevel@tonic-gate { 23537c478bd9Sstevel@tonic-gate ASSERT(ill != NULL); 23547c478bd9Sstevel@tonic-gate ASSERT(ire->ire_stq != NULL); 23557c478bd9Sstevel@tonic-gate 23567c478bd9Sstevel@tonic-gate rw_enter(&ire->ire_bucket->irb_lock, RW_READER); 23577c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 23587c478bd9Sstevel@tonic-gate 23597c478bd9Sstevel@tonic-gate /* 23607c478bd9Sstevel@tonic-gate * if ire has not been deleted and 23617c478bd9Sstevel@tonic-gate * is not already in the list add it. 23627c478bd9Sstevel@tonic-gate */ 23637c478bd9Sstevel@tonic-gate if (((ire->ire_marks & IRE_MARK_CONDEMNED) == 0) && 23647c478bd9Sstevel@tonic-gate (ire->ire_fastpath == NULL)) { 23657c478bd9Sstevel@tonic-gate ire->ire_fastpath = (ire_t *)ill->ill_fastpath_list; 23667c478bd9Sstevel@tonic-gate ill->ill_fastpath_list = ire; 23677c478bd9Sstevel@tonic-gate } 23687c478bd9Sstevel@tonic-gate 23697c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 23707c478bd9Sstevel@tonic-gate rw_exit(&ire->ire_bucket->irb_lock); 23717c478bd9Sstevel@tonic-gate } 23727c478bd9Sstevel@tonic-gate 23737c478bd9Sstevel@tonic-gate /* 23747c478bd9Sstevel@tonic-gate * remove ire from the ire fastpath list. 23757c478bd9Sstevel@tonic-gate */ 23767c478bd9Sstevel@tonic-gate void 23777c478bd9Sstevel@tonic-gate ire_fastpath_list_delete(ill_t *ill, ire_t *ire) 23787c478bd9Sstevel@tonic-gate { 23797c478bd9Sstevel@tonic-gate ire_t *ire_ptr; 23807c478bd9Sstevel@tonic-gate 23817c478bd9Sstevel@tonic-gate ASSERT(ire->ire_stq != NULL && ill != NULL); 23827c478bd9Sstevel@tonic-gate 23837c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 23847c478bd9Sstevel@tonic-gate if (ire->ire_fastpath == NULL) 23857c478bd9Sstevel@tonic-gate goto done; 23867c478bd9Sstevel@tonic-gate 23877c478bd9Sstevel@tonic-gate ASSERT(ill->ill_fastpath_list != &ill->ill_fastpath_list); 23887c478bd9Sstevel@tonic-gate 23897c478bd9Sstevel@tonic-gate if (ill->ill_fastpath_list == ire) { 23907c478bd9Sstevel@tonic-gate ill->ill_fastpath_list = ire->ire_fastpath; 23917c478bd9Sstevel@tonic-gate } else { 23927c478bd9Sstevel@tonic-gate ire_ptr = ill->ill_fastpath_list; 23937c478bd9Sstevel@tonic-gate while (ire_ptr != (ire_t *)&ill->ill_fastpath_list) { 23947c478bd9Sstevel@tonic-gate if (ire_ptr->ire_fastpath == ire) { 23957c478bd9Sstevel@tonic-gate ire_ptr->ire_fastpath = ire->ire_fastpath; 23967c478bd9Sstevel@tonic-gate break; 23977c478bd9Sstevel@tonic-gate } 23987c478bd9Sstevel@tonic-gate ire_ptr = ire_ptr->ire_fastpath; 23997c478bd9Sstevel@tonic-gate } 24007c478bd9Sstevel@tonic-gate } 24017c478bd9Sstevel@tonic-gate ire->ire_fastpath = NULL; 24027c478bd9Sstevel@tonic-gate done: 24037c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 24047c478bd9Sstevel@tonic-gate } 24057c478bd9Sstevel@tonic-gate 24067c478bd9Sstevel@tonic-gate /* 24077c478bd9Sstevel@tonic-gate * Return any local address. We use this to target ourselves 24087c478bd9Sstevel@tonic-gate * when the src address was specified as 'default'. 24097c478bd9Sstevel@tonic-gate * Preference for IRE_LOCAL entries. 24107c478bd9Sstevel@tonic-gate */ 24117c478bd9Sstevel@tonic-gate ire_t * 24127c478bd9Sstevel@tonic-gate ire_lookup_local(zoneid_t zoneid) 24137c478bd9Sstevel@tonic-gate { 24147c478bd9Sstevel@tonic-gate ire_t *ire; 24157c478bd9Sstevel@tonic-gate irb_t *irb; 24167c478bd9Sstevel@tonic-gate ire_t *maybe = NULL; 24177c478bd9Sstevel@tonic-gate int i; 24187c478bd9Sstevel@tonic-gate 24197c478bd9Sstevel@tonic-gate for (i = 0; i < ip_cache_table_size; i++) { 24207c478bd9Sstevel@tonic-gate irb = &ip_cache_table[i]; 24217c478bd9Sstevel@tonic-gate if (irb->irb_ire == NULL) 24227c478bd9Sstevel@tonic-gate continue; 24237c478bd9Sstevel@tonic-gate rw_enter(&irb->irb_lock, RW_READER); 24247c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 24257c478bd9Sstevel@tonic-gate if ((ire->ire_marks & IRE_MARK_CONDEMNED) || 242645916cd2Sjpk (ire->ire_zoneid != zoneid && 242745916cd2Sjpk ire->ire_zoneid != ALL_ZONES)) 24287c478bd9Sstevel@tonic-gate continue; 24297c478bd9Sstevel@tonic-gate switch (ire->ire_type) { 24307c478bd9Sstevel@tonic-gate case IRE_LOOPBACK: 24317c478bd9Sstevel@tonic-gate if (maybe == NULL) { 24327c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 24337c478bd9Sstevel@tonic-gate maybe = ire; 24347c478bd9Sstevel@tonic-gate } 24357c478bd9Sstevel@tonic-gate break; 24367c478bd9Sstevel@tonic-gate case IRE_LOCAL: 24377c478bd9Sstevel@tonic-gate if (maybe != NULL) { 24387c478bd9Sstevel@tonic-gate ire_refrele(maybe); 24397c478bd9Sstevel@tonic-gate } 24407c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 24417c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 24427c478bd9Sstevel@tonic-gate return (ire); 24437c478bd9Sstevel@tonic-gate } 24447c478bd9Sstevel@tonic-gate } 24457c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 24467c478bd9Sstevel@tonic-gate } 24477c478bd9Sstevel@tonic-gate return (maybe); 24487c478bd9Sstevel@tonic-gate } 24497c478bd9Sstevel@tonic-gate 24507c478bd9Sstevel@tonic-gate /* 24517c478bd9Sstevel@tonic-gate * If the specified IRE is associated with a particular ILL, return 24527c478bd9Sstevel@tonic-gate * that ILL pointer (May be called as writer.). 24537c478bd9Sstevel@tonic-gate * 24547c478bd9Sstevel@tonic-gate * NOTE : This is not a generic function that can be used always. 24557c478bd9Sstevel@tonic-gate * This function always returns the ill of the outgoing packets 24567c478bd9Sstevel@tonic-gate * if this ire is used. 24577c478bd9Sstevel@tonic-gate */ 24587c478bd9Sstevel@tonic-gate ill_t * 245945916cd2Sjpk ire_to_ill(const ire_t *ire) 24607c478bd9Sstevel@tonic-gate { 24617c478bd9Sstevel@tonic-gate ill_t *ill = NULL; 24627c478bd9Sstevel@tonic-gate 24637c478bd9Sstevel@tonic-gate /* 24647c478bd9Sstevel@tonic-gate * 1) For an IRE_CACHE, ire_ipif is the one where it obtained 24657c478bd9Sstevel@tonic-gate * the source address from. ire_stq is the one where the 24667c478bd9Sstevel@tonic-gate * packets will be sent out on. We return that here. 24677c478bd9Sstevel@tonic-gate * 24687c478bd9Sstevel@tonic-gate * 2) IRE_BROADCAST normally has a loopback and a non-loopback 24697c478bd9Sstevel@tonic-gate * copy and they always exist next to each other with loopback 24707c478bd9Sstevel@tonic-gate * copy being the first one. If we are called on the non-loopback 24717c478bd9Sstevel@tonic-gate * copy, return the one pointed by ire_stq. If it was called on 24727c478bd9Sstevel@tonic-gate * a loopback copy, we still return the one pointed by the next 24737c478bd9Sstevel@tonic-gate * ire's ire_stq pointer i.e the one pointed by the non-loopback 24747c478bd9Sstevel@tonic-gate * copy. We don't want use ire_ipif as it might represent the 24757c478bd9Sstevel@tonic-gate * source address (if we borrow source addresses for 24767c478bd9Sstevel@tonic-gate * IRE_BROADCASTS in the future). 24777c478bd9Sstevel@tonic-gate * However if an interface is currently coming up, the above 24787c478bd9Sstevel@tonic-gate * condition may not hold during that period since the ires 24797c478bd9Sstevel@tonic-gate * are added one at a time. Thus one of the pair could have been 24807c478bd9Sstevel@tonic-gate * added and the other not yet added. 24817c478bd9Sstevel@tonic-gate * 3) For all others return the ones pointed by ire_ipif->ipif_ill. 24827c478bd9Sstevel@tonic-gate */ 24837c478bd9Sstevel@tonic-gate 24847c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE) { 24857c478bd9Sstevel@tonic-gate ill = (ill_t *)ire->ire_stq->q_ptr; 24867c478bd9Sstevel@tonic-gate } else if (ire->ire_type == IRE_BROADCAST) { 24877c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) { 24887c478bd9Sstevel@tonic-gate ill = (ill_t *)ire->ire_stq->q_ptr; 24897c478bd9Sstevel@tonic-gate } else { 24907c478bd9Sstevel@tonic-gate ire_t *ire_next; 24917c478bd9Sstevel@tonic-gate 24927c478bd9Sstevel@tonic-gate ire_next = ire->ire_next; 24937c478bd9Sstevel@tonic-gate if (ire_next != NULL && 24947c478bd9Sstevel@tonic-gate ire_next->ire_type == IRE_BROADCAST && 24957c478bd9Sstevel@tonic-gate ire_next->ire_addr == ire->ire_addr && 24967c478bd9Sstevel@tonic-gate ire_next->ire_ipif == ire->ire_ipif) { 24977c478bd9Sstevel@tonic-gate ill = (ill_t *)ire_next->ire_stq->q_ptr; 24987c478bd9Sstevel@tonic-gate } 24997c478bd9Sstevel@tonic-gate } 25007c478bd9Sstevel@tonic-gate } else if (ire->ire_ipif != NULL) { 25017c478bd9Sstevel@tonic-gate ill = ire->ire_ipif->ipif_ill; 25027c478bd9Sstevel@tonic-gate } 25037c478bd9Sstevel@tonic-gate return (ill); 25047c478bd9Sstevel@tonic-gate } 25057c478bd9Sstevel@tonic-gate 25067c478bd9Sstevel@tonic-gate /* Arrange to call the specified function for every IRE in the world. */ 25077c478bd9Sstevel@tonic-gate void 250845916cd2Sjpk ire_walk(pfv_t func, void *arg) 25097c478bd9Sstevel@tonic-gate { 25107c478bd9Sstevel@tonic-gate ire_walk_ipvers(func, arg, 0, ALL_ZONES); 25117c478bd9Sstevel@tonic-gate } 25127c478bd9Sstevel@tonic-gate 25137c478bd9Sstevel@tonic-gate void 251445916cd2Sjpk ire_walk_v4(pfv_t func, void *arg, zoneid_t zoneid) 25157c478bd9Sstevel@tonic-gate { 25167c478bd9Sstevel@tonic-gate ire_walk_ipvers(func, arg, IPV4_VERSION, zoneid); 25177c478bd9Sstevel@tonic-gate } 25187c478bd9Sstevel@tonic-gate 25197c478bd9Sstevel@tonic-gate void 252045916cd2Sjpk ire_walk_v6(pfv_t func, void *arg, zoneid_t zoneid) 25217c478bd9Sstevel@tonic-gate { 25227c478bd9Sstevel@tonic-gate ire_walk_ipvers(func, arg, IPV6_VERSION, zoneid); 25237c478bd9Sstevel@tonic-gate } 25247c478bd9Sstevel@tonic-gate 25257c478bd9Sstevel@tonic-gate /* 25267c478bd9Sstevel@tonic-gate * Walk a particular version. version == 0 means both v4 and v6. 25277c478bd9Sstevel@tonic-gate */ 25287c478bd9Sstevel@tonic-gate static void 252945916cd2Sjpk ire_walk_ipvers(pfv_t func, void *arg, uchar_t vers, zoneid_t zoneid) 25307c478bd9Sstevel@tonic-gate { 25317c478bd9Sstevel@tonic-gate if (vers != IPV6_VERSION) { 2532c793af95Ssangeeta /* 2533c793af95Ssangeeta * ip_forwarding_table variable doesn't matter for IPv4 since 2534c793af95Ssangeeta * ire_walk_ill_tables directly calls with the ip_ftable global 2535c793af95Ssangeeta */ 25367c478bd9Sstevel@tonic-gate ire_walk_ill_tables(0, 0, func, arg, IP_MASK_TABLE_SIZE, 2537c793af95Ssangeeta 0, NULL, 25387c478bd9Sstevel@tonic-gate ip_cache_table_size, ip_cache_table, NULL, zoneid); 25397c478bd9Sstevel@tonic-gate } 25407c478bd9Sstevel@tonic-gate if (vers != IPV4_VERSION) { 25417c478bd9Sstevel@tonic-gate ire_walk_ill_tables(0, 0, func, arg, IP6_MASK_TABLE_SIZE, 25427c478bd9Sstevel@tonic-gate ip6_ftable_hash_size, ip_forwarding_table_v6, 25437c478bd9Sstevel@tonic-gate ip6_cache_table_size, ip_cache_table_v6, NULL, zoneid); 25447c478bd9Sstevel@tonic-gate } 25457c478bd9Sstevel@tonic-gate } 25467c478bd9Sstevel@tonic-gate 25477c478bd9Sstevel@tonic-gate /* 25487c478bd9Sstevel@tonic-gate * Arrange to call the specified 25497c478bd9Sstevel@tonic-gate * function for every IRE that matches the ill. 25507c478bd9Sstevel@tonic-gate */ 25517c478bd9Sstevel@tonic-gate void 255245916cd2Sjpk ire_walk_ill(uint_t match_flags, uint_t ire_type, pfv_t func, void *arg, 25537c478bd9Sstevel@tonic-gate ill_t *ill) 25547c478bd9Sstevel@tonic-gate { 25557c478bd9Sstevel@tonic-gate ire_walk_ill_ipvers(match_flags, ire_type, func, arg, 0, ill); 25567c478bd9Sstevel@tonic-gate } 25577c478bd9Sstevel@tonic-gate 25587c478bd9Sstevel@tonic-gate void 255945916cd2Sjpk ire_walk_ill_v4(uint_t match_flags, uint_t ire_type, pfv_t func, void *arg, 25607c478bd9Sstevel@tonic-gate ill_t *ill) 25617c478bd9Sstevel@tonic-gate { 25627c478bd9Sstevel@tonic-gate ire_walk_ill_ipvers(match_flags, ire_type, func, arg, IPV4_VERSION, 25637c478bd9Sstevel@tonic-gate ill); 25647c478bd9Sstevel@tonic-gate } 25657c478bd9Sstevel@tonic-gate 25667c478bd9Sstevel@tonic-gate void 256745916cd2Sjpk ire_walk_ill_v6(uint_t match_flags, uint_t ire_type, pfv_t func, void *arg, 25687c478bd9Sstevel@tonic-gate ill_t *ill) 25697c478bd9Sstevel@tonic-gate { 25707c478bd9Sstevel@tonic-gate ire_walk_ill_ipvers(match_flags, ire_type, func, arg, IPV6_VERSION, 25717c478bd9Sstevel@tonic-gate ill); 25727c478bd9Sstevel@tonic-gate } 25737c478bd9Sstevel@tonic-gate 25747c478bd9Sstevel@tonic-gate /* 25757c478bd9Sstevel@tonic-gate * Walk a particular ill and version. version == 0 means both v4 and v6. 25767c478bd9Sstevel@tonic-gate */ 25777c478bd9Sstevel@tonic-gate static void 25787c478bd9Sstevel@tonic-gate ire_walk_ill_ipvers(uint_t match_flags, uint_t ire_type, pfv_t func, 257945916cd2Sjpk void *arg, uchar_t vers, ill_t *ill) 25807c478bd9Sstevel@tonic-gate { 25817c478bd9Sstevel@tonic-gate if (vers != IPV6_VERSION) { 25827c478bd9Sstevel@tonic-gate ire_walk_ill_tables(match_flags, ire_type, func, arg, 2583c793af95Ssangeeta IP_MASK_TABLE_SIZE, 0, 2584c793af95Ssangeeta NULL, ip_cache_table_size, 25857c478bd9Sstevel@tonic-gate ip_cache_table, ill, ALL_ZONES); 25867c478bd9Sstevel@tonic-gate } 25877c478bd9Sstevel@tonic-gate if (vers != IPV4_VERSION) { 25887c478bd9Sstevel@tonic-gate ire_walk_ill_tables(match_flags, ire_type, func, arg, 25897c478bd9Sstevel@tonic-gate IP6_MASK_TABLE_SIZE, ip6_ftable_hash_size, 25907c478bd9Sstevel@tonic-gate ip_forwarding_table_v6, ip6_cache_table_size, 25917c478bd9Sstevel@tonic-gate ip_cache_table_v6, ill, ALL_ZONES); 25927c478bd9Sstevel@tonic-gate } 25937c478bd9Sstevel@tonic-gate } 25947c478bd9Sstevel@tonic-gate 2595c793af95Ssangeeta boolean_t 25967c478bd9Sstevel@tonic-gate ire_walk_ill_match(uint_t match_flags, uint_t ire_type, ire_t *ire, 25977c478bd9Sstevel@tonic-gate ill_t *ill, zoneid_t zoneid) 25987c478bd9Sstevel@tonic-gate { 25997c478bd9Sstevel@tonic-gate ill_t *ire_stq_ill = NULL; 26007c478bd9Sstevel@tonic-gate ill_t *ire_ipif_ill = NULL; 26017c478bd9Sstevel@tonic-gate ill_group_t *ire_ill_group = NULL; 26027c478bd9Sstevel@tonic-gate 26037c478bd9Sstevel@tonic-gate ASSERT(match_flags != 0 || zoneid != ALL_ZONES); 26047c478bd9Sstevel@tonic-gate /* 26057c478bd9Sstevel@tonic-gate * 1) MATCH_IRE_WQ : Used specifically to match on ire_stq. 26067c478bd9Sstevel@tonic-gate * The fast path update uses this to make sure it does not 26077c478bd9Sstevel@tonic-gate * update the fast path header of interface X with the fast 26087c478bd9Sstevel@tonic-gate * path updates it recieved on interface Y. It is similar 26097c478bd9Sstevel@tonic-gate * in handling DL_NOTE_FASTPATH_FLUSH. 26107c478bd9Sstevel@tonic-gate * 26117c478bd9Sstevel@tonic-gate * 2) MATCH_IRE_ILL/MATCH_IRE_ILL_GROUP : We match both on ill 26127c478bd9Sstevel@tonic-gate * pointed by ire_stq and ire_ipif. Only in the case of 26137c478bd9Sstevel@tonic-gate * IRE_CACHEs can ire_stq and ire_ipif be pointing to 26147c478bd9Sstevel@tonic-gate * different ills. But we want to keep this function generic 26157c478bd9Sstevel@tonic-gate * enough for future use. So, we always try to match on both. 26167c478bd9Sstevel@tonic-gate * The only caller of this function ire_walk_ill_tables, will 26177c478bd9Sstevel@tonic-gate * call "func" after we return from this function. We expect 26187c478bd9Sstevel@tonic-gate * "func" to do the right filtering of ires in this case. 26197c478bd9Sstevel@tonic-gate * 26207c478bd9Sstevel@tonic-gate * NOTE : In the case of MATCH_IRE_ILL_GROUP, groups 26217c478bd9Sstevel@tonic-gate * pointed by ire_stq and ire_ipif should always be the same. 26227c478bd9Sstevel@tonic-gate * So, we just match on only one of them. 26237c478bd9Sstevel@tonic-gate */ 26247c478bd9Sstevel@tonic-gate if (match_flags & (MATCH_IRE_ILL|MATCH_IRE_ILL_GROUP)) { 26257c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) 26267c478bd9Sstevel@tonic-gate ire_stq_ill = (ill_t *)ire->ire_stq->q_ptr; 26277c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) 26287c478bd9Sstevel@tonic-gate ire_ipif_ill = ire->ire_ipif->ipif_ill; 26297c478bd9Sstevel@tonic-gate if (ire_stq_ill != NULL) 26307c478bd9Sstevel@tonic-gate ire_ill_group = ire_stq_ill->ill_group; 26317c478bd9Sstevel@tonic-gate if ((ire_ill_group == NULL) && (ire_ipif_ill != NULL)) 26327c478bd9Sstevel@tonic-gate ire_ill_group = ire_ipif_ill->ill_group; 26337c478bd9Sstevel@tonic-gate } 26347c478bd9Sstevel@tonic-gate 26357c478bd9Sstevel@tonic-gate if (zoneid != ALL_ZONES) { 26367c478bd9Sstevel@tonic-gate /* 26377c478bd9Sstevel@tonic-gate * We're walking the IREs for a specific zone. The only relevant 26387c478bd9Sstevel@tonic-gate * IREs are: 26397c478bd9Sstevel@tonic-gate * - all IREs with a matching ire_zoneid 26407c478bd9Sstevel@tonic-gate * - all IRE_OFFSUBNETs as they're shared across all zones 26417c478bd9Sstevel@tonic-gate * - IRE_INTERFACE IREs for interfaces with a usable source addr 26427c478bd9Sstevel@tonic-gate * with a matching zone 26437c478bd9Sstevel@tonic-gate * - IRE_DEFAULTs with a gateway reachable from the zone 26447c478bd9Sstevel@tonic-gate * We should really match on IRE_OFFSUBNETs and IRE_DEFAULTs 26457c478bd9Sstevel@tonic-gate * using the same rule; but the above rules are consistent with 26467c478bd9Sstevel@tonic-gate * the behavior of ire_ftable_lookup[_v6]() so that all the 26477c478bd9Sstevel@tonic-gate * routes that can be matched during lookup are also matched 26487c478bd9Sstevel@tonic-gate * here. 26497c478bd9Sstevel@tonic-gate */ 265045916cd2Sjpk if (zoneid != ire->ire_zoneid && ire->ire_zoneid != ALL_ZONES) { 26517c478bd9Sstevel@tonic-gate /* 26527c478bd9Sstevel@tonic-gate * Note, IRE_INTERFACE can have the stq as NULL. For 26537c478bd9Sstevel@tonic-gate * example, if the default multicast route is tied to 26547c478bd9Sstevel@tonic-gate * the loopback address. 26557c478bd9Sstevel@tonic-gate */ 26567c478bd9Sstevel@tonic-gate if ((ire->ire_type & IRE_INTERFACE) && 26577c478bd9Sstevel@tonic-gate (ire->ire_stq != NULL)) { 26587c478bd9Sstevel@tonic-gate ire_stq_ill = (ill_t *)ire->ire_stq->q_ptr; 26597c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 26607c478bd9Sstevel@tonic-gate if (!ipif_usesrc_avail(ire_stq_ill, 26617c478bd9Sstevel@tonic-gate zoneid)) 26627c478bd9Sstevel@tonic-gate /* No usable src addr in zone */ 26637c478bd9Sstevel@tonic-gate return (B_FALSE); 26647c478bd9Sstevel@tonic-gate } else if (ire_stq_ill->ill_usesrc_ifindex 26657c478bd9Sstevel@tonic-gate != 0) { 26667c478bd9Sstevel@tonic-gate /* 26677c478bd9Sstevel@tonic-gate * For IPv6 use ipif_select_source_v6() 26687c478bd9Sstevel@tonic-gate * so the right scope selection is done 26697c478bd9Sstevel@tonic-gate */ 26707c478bd9Sstevel@tonic-gate ipif_t *src_ipif; 26717c478bd9Sstevel@tonic-gate src_ipif = 26727c478bd9Sstevel@tonic-gate ipif_select_source_v6(ire_stq_ill, 2673309fa174Srk129064 &ire->ire_addr_v6, RESTRICT_TO_NONE, 26747c478bd9Sstevel@tonic-gate IPV6_PREFER_SRC_DEFAULT, 26757c478bd9Sstevel@tonic-gate zoneid); 26767c478bd9Sstevel@tonic-gate if (src_ipif != NULL) { 26777c478bd9Sstevel@tonic-gate ipif_refrele(src_ipif); 26787c478bd9Sstevel@tonic-gate } else { 26797c478bd9Sstevel@tonic-gate return (B_FALSE); 26807c478bd9Sstevel@tonic-gate } 26817c478bd9Sstevel@tonic-gate } else { 26827c478bd9Sstevel@tonic-gate return (B_FALSE); 26837c478bd9Sstevel@tonic-gate } 26847c478bd9Sstevel@tonic-gate 26857c478bd9Sstevel@tonic-gate } else if (!(ire->ire_type & IRE_OFFSUBNET)) { 26867c478bd9Sstevel@tonic-gate return (B_FALSE); 26877c478bd9Sstevel@tonic-gate } 26887c478bd9Sstevel@tonic-gate } 26897c478bd9Sstevel@tonic-gate 26907c478bd9Sstevel@tonic-gate /* 26917c478bd9Sstevel@tonic-gate * Match all default routes from the global zone, irrespective 2692*5597b60aSnordmark * of reachability. For a non-global zone only match those 2693*5597b60aSnordmark * where ire_gateway_addr has a IRE_INTERFACE for the zoneid. 26947c478bd9Sstevel@tonic-gate */ 26957c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT && zoneid != GLOBAL_ZONEID) { 26967c478bd9Sstevel@tonic-gate int ire_match_flags = 0; 26977c478bd9Sstevel@tonic-gate in6_addr_t gw_addr_v6; 26987c478bd9Sstevel@tonic-gate ire_t *rire; 26997c478bd9Sstevel@tonic-gate 2700*5597b60aSnordmark ire_match_flags |= MATCH_IRE_TYPE; 27017c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) { 27027c478bd9Sstevel@tonic-gate ire_match_flags |= MATCH_IRE_ILL_GROUP; 27037c478bd9Sstevel@tonic-gate } 27047c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 27057c478bd9Sstevel@tonic-gate rire = ire_route_lookup(ire->ire_gateway_addr, 2706*5597b60aSnordmark 0, 0, IRE_INTERFACE, ire->ire_ipif, NULL, 2707*5597b60aSnordmark zoneid, NULL, ire_match_flags); 27087c478bd9Sstevel@tonic-gate } else { 27097c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV6_VERSION); 27107c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 27117c478bd9Sstevel@tonic-gate gw_addr_v6 = ire->ire_gateway_addr_v6; 27127c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 27137c478bd9Sstevel@tonic-gate rire = ire_route_lookup_v6(&gw_addr_v6, 2714*5597b60aSnordmark NULL, NULL, IRE_INTERFACE, ire->ire_ipif, 2715*5597b60aSnordmark NULL, zoneid, NULL, ire_match_flags); 27167c478bd9Sstevel@tonic-gate } 27177c478bd9Sstevel@tonic-gate if (rire == NULL) { 27187c478bd9Sstevel@tonic-gate return (B_FALSE); 27197c478bd9Sstevel@tonic-gate } 27207c478bd9Sstevel@tonic-gate ire_refrele(rire); 27217c478bd9Sstevel@tonic-gate } 27227c478bd9Sstevel@tonic-gate } 27237c478bd9Sstevel@tonic-gate 27247c478bd9Sstevel@tonic-gate if (((!(match_flags & MATCH_IRE_TYPE)) || 27257c478bd9Sstevel@tonic-gate (ire->ire_type & ire_type)) && 27267c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_WQ)) || 27277c478bd9Sstevel@tonic-gate (ire->ire_stq == ill->ill_wq)) && 27287c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_ILL)) || 27297c478bd9Sstevel@tonic-gate (ire_stq_ill == ill || ire_ipif_ill == ill)) && 27307c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_ILL_GROUP)) || 27317c478bd9Sstevel@tonic-gate (ire_stq_ill == ill) || (ire_ipif_ill == ill) || 27327c478bd9Sstevel@tonic-gate (ire_ill_group != NULL && 27337c478bd9Sstevel@tonic-gate ire_ill_group == ill->ill_group))) { 27347c478bd9Sstevel@tonic-gate return (B_TRUE); 27357c478bd9Sstevel@tonic-gate } 27367c478bd9Sstevel@tonic-gate return (B_FALSE); 27377c478bd9Sstevel@tonic-gate } 27387c478bd9Sstevel@tonic-gate 2739c793af95Ssangeeta int 2740c793af95Ssangeeta rtfunc(struct radix_node *rn, void *arg) 2741c793af95Ssangeeta { 2742c793af95Ssangeeta struct rtfuncarg *rtf = arg; 2743c793af95Ssangeeta struct rt_entry *rt; 2744c793af95Ssangeeta irb_t *irb; 2745c793af95Ssangeeta ire_t *ire; 2746c793af95Ssangeeta boolean_t ret; 2747c793af95Ssangeeta 2748c793af95Ssangeeta rt = (struct rt_entry *)rn; 2749c793af95Ssangeeta ASSERT(rt != NULL); 2750c793af95Ssangeeta irb = &rt->rt_irb; 2751c793af95Ssangeeta for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 2752c793af95Ssangeeta if ((rtf->rt_match_flags != 0) || 2753c793af95Ssangeeta (rtf->rt_zoneid != ALL_ZONES)) { 2754c793af95Ssangeeta ret = ire_walk_ill_match(rtf->rt_match_flags, 2755c793af95Ssangeeta rtf->rt_ire_type, ire, 2756c793af95Ssangeeta rtf->rt_ill, rtf->rt_zoneid); 2757c793af95Ssangeeta } else 2758c793af95Ssangeeta ret = B_TRUE; 2759c793af95Ssangeeta if (ret) 2760c793af95Ssangeeta (*rtf->rt_func)(ire, rtf->rt_arg); 2761c793af95Ssangeeta } 2762c793af95Ssangeeta return (0); 2763c793af95Ssangeeta } 2764c793af95Ssangeeta 27657c478bd9Sstevel@tonic-gate /* 27667c478bd9Sstevel@tonic-gate * Walk the ftable and the ctable entries that match the ill. 27677c478bd9Sstevel@tonic-gate */ 2768c793af95Ssangeeta void 27697c478bd9Sstevel@tonic-gate ire_walk_ill_tables(uint_t match_flags, uint_t ire_type, pfv_t func, 277045916cd2Sjpk void *arg, size_t ftbl_sz, size_t htbl_sz, irb_t **ipftbl, 27717c478bd9Sstevel@tonic-gate size_t ctbl_sz, irb_t *ipctbl, ill_t *ill, zoneid_t zoneid) 27727c478bd9Sstevel@tonic-gate { 27737c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 27747c478bd9Sstevel@tonic-gate irb_t *irb; 27757c478bd9Sstevel@tonic-gate ire_t *ire; 27767c478bd9Sstevel@tonic-gate int i, j; 27777c478bd9Sstevel@tonic-gate boolean_t ret; 2778c793af95Ssangeeta struct rtfuncarg rtfarg; 27797c478bd9Sstevel@tonic-gate 27807c478bd9Sstevel@tonic-gate ASSERT((!(match_flags & (MATCH_IRE_WQ | MATCH_IRE_ILL | 27817c478bd9Sstevel@tonic-gate MATCH_IRE_ILL_GROUP))) || (ill != NULL)); 27827c478bd9Sstevel@tonic-gate ASSERT(!(match_flags & MATCH_IRE_TYPE) || (ire_type != 0)); 27837c478bd9Sstevel@tonic-gate /* 27847c478bd9Sstevel@tonic-gate * Optimize by not looking at the forwarding table if there 27857c478bd9Sstevel@tonic-gate * is a MATCH_IRE_TYPE specified with no IRE_FORWARDTABLE 27867c478bd9Sstevel@tonic-gate * specified in ire_type. 27877c478bd9Sstevel@tonic-gate */ 27887c478bd9Sstevel@tonic-gate if (!(match_flags & MATCH_IRE_TYPE) || 27897c478bd9Sstevel@tonic-gate ((ire_type & IRE_FORWARDTABLE) != 0)) { 2790c793af95Ssangeeta /* knobs such that routine is called only for v6 case */ 2791c793af95Ssangeeta if (ipftbl == ip_forwarding_table_v6) { 27927c478bd9Sstevel@tonic-gate for (i = (ftbl_sz - 1); i >= 0; i--) { 27937c478bd9Sstevel@tonic-gate if ((irb_ptr = ipftbl[i]) == NULL) 27947c478bd9Sstevel@tonic-gate continue; 27957c478bd9Sstevel@tonic-gate for (j = 0; j < htbl_sz; j++) { 27967c478bd9Sstevel@tonic-gate irb = &irb_ptr[j]; 27977c478bd9Sstevel@tonic-gate if (irb->irb_ire == NULL) 27987c478bd9Sstevel@tonic-gate continue; 2799c793af95Ssangeeta 28007c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 28017c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; 28027c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 28037c478bd9Sstevel@tonic-gate if (match_flags == 0 && 28047c478bd9Sstevel@tonic-gate zoneid == ALL_ZONES) { 28057c478bd9Sstevel@tonic-gate ret = B_TRUE; 28067c478bd9Sstevel@tonic-gate } else { 2807c793af95Ssangeeta ret = 2808c793af95Ssangeeta ire_walk_ill_match( 2809c793af95Ssangeeta match_flags, 2810c793af95Ssangeeta ire_type, ire, ill, 2811c793af95Ssangeeta zoneid); 28127c478bd9Sstevel@tonic-gate } 28137c478bd9Sstevel@tonic-gate if (ret) 28147c478bd9Sstevel@tonic-gate (*func)(ire, arg); 28157c478bd9Sstevel@tonic-gate } 28167c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 28177c478bd9Sstevel@tonic-gate } 28187c478bd9Sstevel@tonic-gate } 2819c793af95Ssangeeta } else { 2820c793af95Ssangeeta (void) memset(&rtfarg, 0, sizeof (rtfarg)); 2821c793af95Ssangeeta rtfarg.rt_func = func; 2822c793af95Ssangeeta rtfarg.rt_arg = arg; 2823c793af95Ssangeeta if (match_flags != 0) { 2824c793af95Ssangeeta rtfarg.rt_match_flags = match_flags; 2825c793af95Ssangeeta } 2826c793af95Ssangeeta rtfarg.rt_ire_type = ire_type; 2827c793af95Ssangeeta rtfarg.rt_ill = ill; 2828c793af95Ssangeeta rtfarg.rt_zoneid = zoneid; 2829c793af95Ssangeeta (void) ip_ftable->rnh_walktree(ip_ftable, rtfunc, 2830c793af95Ssangeeta &rtfarg); 2831c793af95Ssangeeta } 28327c478bd9Sstevel@tonic-gate } 28337c478bd9Sstevel@tonic-gate 28347c478bd9Sstevel@tonic-gate /* 28357c478bd9Sstevel@tonic-gate * Optimize by not looking at the cache table if there 28367c478bd9Sstevel@tonic-gate * is a MATCH_IRE_TYPE specified with no IRE_CACHETABLE 28377c478bd9Sstevel@tonic-gate * specified in ire_type. 28387c478bd9Sstevel@tonic-gate */ 28397c478bd9Sstevel@tonic-gate if (!(match_flags & MATCH_IRE_TYPE) || 28407c478bd9Sstevel@tonic-gate ((ire_type & IRE_CACHETABLE) != 0)) { 28417c478bd9Sstevel@tonic-gate for (i = 0; i < ctbl_sz; i++) { 28427c478bd9Sstevel@tonic-gate irb = &ipctbl[i]; 28437c478bd9Sstevel@tonic-gate if (irb->irb_ire == NULL) 28447c478bd9Sstevel@tonic-gate continue; 28457c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 28467c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; 28477c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 28487c478bd9Sstevel@tonic-gate if (match_flags == 0 && zoneid == ALL_ZONES) { 28497c478bd9Sstevel@tonic-gate ret = B_TRUE; 28507c478bd9Sstevel@tonic-gate } else { 28517c478bd9Sstevel@tonic-gate ret = ire_walk_ill_match( 28527c478bd9Sstevel@tonic-gate match_flags, ire_type, 28537c478bd9Sstevel@tonic-gate ire, ill, zoneid); 28547c478bd9Sstevel@tonic-gate } 28557c478bd9Sstevel@tonic-gate if (ret) 28567c478bd9Sstevel@tonic-gate (*func)(ire, arg); 28577c478bd9Sstevel@tonic-gate } 28587c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 28597c478bd9Sstevel@tonic-gate } 28607c478bd9Sstevel@tonic-gate } 28617c478bd9Sstevel@tonic-gate } 28627c478bd9Sstevel@tonic-gate 28637c478bd9Sstevel@tonic-gate /* 28647c478bd9Sstevel@tonic-gate * This routine walks through the ill chain to find if there is any 28657c478bd9Sstevel@tonic-gate * ire linked to the ill's interface based forwarding table 28667c478bd9Sstevel@tonic-gate * The arg could be ill or mp. This routine is called when a ill goes 28677c478bd9Sstevel@tonic-gate * down/deleted or the 'ipv4_ire_srcif_status' report is printed. 28687c478bd9Sstevel@tonic-gate */ 28697c478bd9Sstevel@tonic-gate void 287045916cd2Sjpk ire_walk_srcif_table_v4(pfv_t func, void *arg) 28717c478bd9Sstevel@tonic-gate { 28727c478bd9Sstevel@tonic-gate irb_t *irb; 28737c478bd9Sstevel@tonic-gate ire_t *ire; 28747c478bd9Sstevel@tonic-gate ill_t *ill, *next_ill; 28757c478bd9Sstevel@tonic-gate int i; 28767c478bd9Sstevel@tonic-gate int total_count; 28777c478bd9Sstevel@tonic-gate ill_walk_context_t ctx; 28787c478bd9Sstevel@tonic-gate 28797c478bd9Sstevel@tonic-gate /* 28807c478bd9Sstevel@tonic-gate * Take care of ire's in other ill's per-interface forwarding 28817c478bd9Sstevel@tonic-gate * table. Check if any ire in any of the ill's ill_srcif_table 28827c478bd9Sstevel@tonic-gate * is pointing to this ill. 28837c478bd9Sstevel@tonic-gate */ 28847c478bd9Sstevel@tonic-gate mutex_enter(&ire_srcif_table_lock); 28857c478bd9Sstevel@tonic-gate if (ire_srcif_table_count == 0) { 28867c478bd9Sstevel@tonic-gate mutex_exit(&ire_srcif_table_lock); 28877c478bd9Sstevel@tonic-gate return; 28887c478bd9Sstevel@tonic-gate } 28897c478bd9Sstevel@tonic-gate mutex_exit(&ire_srcif_table_lock); 28907c478bd9Sstevel@tonic-gate 28917c478bd9Sstevel@tonic-gate #ifdef DEBUG 28927c478bd9Sstevel@tonic-gate /* Keep accounting of all interface based table ires */ 28937c478bd9Sstevel@tonic-gate total_count = 0; 28947c478bd9Sstevel@tonic-gate rw_enter(&ill_g_lock, RW_READER); 28957c478bd9Sstevel@tonic-gate ill = ILL_START_WALK_V4(&ctx); 28967c478bd9Sstevel@tonic-gate while (ill != NULL) { 28977c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 28987c478bd9Sstevel@tonic-gate total_count += ill->ill_srcif_refcnt; 28997c478bd9Sstevel@tonic-gate next_ill = ill_next(&ctx, ill); 29007c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 29017c478bd9Sstevel@tonic-gate ill = next_ill; 29027c478bd9Sstevel@tonic-gate } 29037c478bd9Sstevel@tonic-gate rw_exit(&ill_g_lock); 29047c478bd9Sstevel@tonic-gate 29057c478bd9Sstevel@tonic-gate /* Hold lock here to make sure ire_srcif_table_count is stable */ 29067c478bd9Sstevel@tonic-gate mutex_enter(&ire_srcif_table_lock); 29077c478bd9Sstevel@tonic-gate i = ire_srcif_table_count; 29087c478bd9Sstevel@tonic-gate mutex_exit(&ire_srcif_table_lock); 29097c478bd9Sstevel@tonic-gate ip1dbg(("ire_walk_srcif_v4: ire_srcif_table_count %d " 29107c478bd9Sstevel@tonic-gate "total ill_srcif_refcnt %d\n", i, total_count)); 29117c478bd9Sstevel@tonic-gate #endif 29127c478bd9Sstevel@tonic-gate rw_enter(&ill_g_lock, RW_READER); 29137c478bd9Sstevel@tonic-gate ill = ILL_START_WALK_V4(&ctx); 29147c478bd9Sstevel@tonic-gate while (ill != NULL) { 29157c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 29167c478bd9Sstevel@tonic-gate if ((ill->ill_srcif_refcnt == 0) || !ILL_CAN_LOOKUP(ill)) { 29177c478bd9Sstevel@tonic-gate next_ill = ill_next(&ctx, ill); 29187c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 29197c478bd9Sstevel@tonic-gate ill = next_ill; 29207c478bd9Sstevel@tonic-gate continue; 29217c478bd9Sstevel@tonic-gate } 29227c478bd9Sstevel@tonic-gate ill_refhold_locked(ill); 29237c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 29247c478bd9Sstevel@tonic-gate rw_exit(&ill_g_lock); 29257c478bd9Sstevel@tonic-gate if (ill->ill_srcif_table != NULL) { 29267c478bd9Sstevel@tonic-gate for (i = 0; i < IP_SRCIF_TABLE_SIZE; i++) { 29277c478bd9Sstevel@tonic-gate irb = &(ill->ill_srcif_table[i]); 29287c478bd9Sstevel@tonic-gate if (irb->irb_ire == NULL) 29297c478bd9Sstevel@tonic-gate continue; 29307c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 29317c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; 29327c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 29337c478bd9Sstevel@tonic-gate (*func)(ire, arg); 29347c478bd9Sstevel@tonic-gate } 29357c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 29367c478bd9Sstevel@tonic-gate } 29377c478bd9Sstevel@tonic-gate } 29387c478bd9Sstevel@tonic-gate rw_enter(&ill_g_lock, RW_READER); 29397c478bd9Sstevel@tonic-gate next_ill = ill_next(&ctx, ill); 29407c478bd9Sstevel@tonic-gate ill_refrele(ill); 29417c478bd9Sstevel@tonic-gate ill = next_ill; 29427c478bd9Sstevel@tonic-gate } 29437c478bd9Sstevel@tonic-gate rw_exit(&ill_g_lock); 29447c478bd9Sstevel@tonic-gate } 29457c478bd9Sstevel@tonic-gate 29467c478bd9Sstevel@tonic-gate /* 29477c478bd9Sstevel@tonic-gate * This function takes a mask and returns 29487c478bd9Sstevel@tonic-gate * number of bits set in the mask. If no 29497c478bd9Sstevel@tonic-gate * bit is set it returns 0. 29507c478bd9Sstevel@tonic-gate * Assumes a contiguous mask. 29517c478bd9Sstevel@tonic-gate */ 29527c478bd9Sstevel@tonic-gate int 29537c478bd9Sstevel@tonic-gate ip_mask_to_plen(ipaddr_t mask) 29547c478bd9Sstevel@tonic-gate { 29557c478bd9Sstevel@tonic-gate return (mask == 0 ? 0 : IP_ABITS - (ffs(ntohl(mask)) -1)); 29567c478bd9Sstevel@tonic-gate } 29577c478bd9Sstevel@tonic-gate 29587c478bd9Sstevel@tonic-gate /* 29597c478bd9Sstevel@tonic-gate * Convert length for a mask to the mask. 29607c478bd9Sstevel@tonic-gate */ 29617c478bd9Sstevel@tonic-gate ipaddr_t 29627c478bd9Sstevel@tonic-gate ip_plen_to_mask(uint_t masklen) 29637c478bd9Sstevel@tonic-gate { 29647c478bd9Sstevel@tonic-gate return (htonl(IP_HOST_MASK << (IP_ABITS - masklen))); 29657c478bd9Sstevel@tonic-gate } 29667c478bd9Sstevel@tonic-gate 29677c478bd9Sstevel@tonic-gate void 29687c478bd9Sstevel@tonic-gate ire_atomic_end(irb_t *irb_ptr, ire_t *ire) 29697c478bd9Sstevel@tonic-gate { 29707c478bd9Sstevel@tonic-gate ill_t *ill_list[NUM_ILLS]; 29717c478bd9Sstevel@tonic-gate 29727c478bd9Sstevel@tonic-gate ill_list[0] = ire->ire_stq != NULL ? ire->ire_stq->q_ptr : NULL; 29737c478bd9Sstevel@tonic-gate ill_list[1] = ire->ire_ipif != NULL ? ire->ire_ipif->ipif_ill : NULL; 29747c478bd9Sstevel@tonic-gate ill_list[2] = ire->ire_in_ill; 29757c478bd9Sstevel@tonic-gate ill_unlock_ills(ill_list, NUM_ILLS); 29767c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 29777c478bd9Sstevel@tonic-gate rw_exit(&ill_g_usesrc_lock); 29787c478bd9Sstevel@tonic-gate } 29797c478bd9Sstevel@tonic-gate 29807c478bd9Sstevel@tonic-gate /* 29817c478bd9Sstevel@tonic-gate * ire_add_v[46] atomically make sure that the ipif or ill associated 29827c478bd9Sstevel@tonic-gate * with the new ire being added is stable and not IPIF_CHANGING or ILL_CHANGING 29837c478bd9Sstevel@tonic-gate * before adding the ire to the table. This ensures that we don't create 29847c478bd9Sstevel@tonic-gate * new IRE_CACHEs with stale values for parameters that are passed to 29857c478bd9Sstevel@tonic-gate * ire_create such as ire_max_frag. Note that ire_create() is passed a pointer 29867c478bd9Sstevel@tonic-gate * to the ipif_mtu, and not the value. The actual value is derived from the 29877c478bd9Sstevel@tonic-gate * parent ire or ipif under the bucket lock. 29887c478bd9Sstevel@tonic-gate */ 29897c478bd9Sstevel@tonic-gate int 29907c478bd9Sstevel@tonic-gate ire_atomic_start(irb_t *irb_ptr, ire_t *ire, queue_t *q, mblk_t *mp, 29917c478bd9Sstevel@tonic-gate ipsq_func_t func) 29927c478bd9Sstevel@tonic-gate { 29937c478bd9Sstevel@tonic-gate ill_t *stq_ill; 29947c478bd9Sstevel@tonic-gate ill_t *ipif_ill; 29957c478bd9Sstevel@tonic-gate ill_t *in_ill; 29967c478bd9Sstevel@tonic-gate ill_t *ill_list[NUM_ILLS]; 29977c478bd9Sstevel@tonic-gate int cnt = NUM_ILLS; 29987c478bd9Sstevel@tonic-gate int error = 0; 29997c478bd9Sstevel@tonic-gate ill_t *ill = NULL; 30007c478bd9Sstevel@tonic-gate 30017c478bd9Sstevel@tonic-gate ill_list[0] = stq_ill = ire->ire_stq != 30027c478bd9Sstevel@tonic-gate NULL ? ire->ire_stq->q_ptr : NULL; 30037c478bd9Sstevel@tonic-gate ill_list[1] = ipif_ill = ire->ire_ipif != 30047c478bd9Sstevel@tonic-gate NULL ? ire->ire_ipif->ipif_ill : NULL; 30057c478bd9Sstevel@tonic-gate ill_list[2] = in_ill = ire->ire_in_ill; 30067c478bd9Sstevel@tonic-gate 30077c478bd9Sstevel@tonic-gate ASSERT((q != NULL && mp != NULL && func != NULL) || 30087c478bd9Sstevel@tonic-gate (q == NULL && mp == NULL && func == NULL)); 30097c478bd9Sstevel@tonic-gate rw_enter(&ill_g_usesrc_lock, RW_READER); 30107c478bd9Sstevel@tonic-gate GRAB_CONN_LOCK(q); 30117c478bd9Sstevel@tonic-gate rw_enter(&irb_ptr->irb_lock, RW_WRITER); 30127c478bd9Sstevel@tonic-gate ill_lock_ills(ill_list, cnt); 30137c478bd9Sstevel@tonic-gate 30147c478bd9Sstevel@tonic-gate /* 30157c478bd9Sstevel@tonic-gate * While the IRE is in the process of being added, a user may have 30167c478bd9Sstevel@tonic-gate * invoked the ifconfig usesrc option on the stq_ill to make it a 30177c478bd9Sstevel@tonic-gate * usesrc client ILL. Check for this possibility here, if it is true 30187c478bd9Sstevel@tonic-gate * then we fail adding the IRE_CACHE. Another check is to make sure 30197c478bd9Sstevel@tonic-gate * that an ipif_ill of an IRE_CACHE being added is not part of a usesrc 30207c478bd9Sstevel@tonic-gate * group. The ill_g_usesrc_lock is released in ire_atomic_end 30217c478bd9Sstevel@tonic-gate */ 30227c478bd9Sstevel@tonic-gate if ((ire->ire_type & IRE_CACHE) && 30237c478bd9Sstevel@tonic-gate (ire->ire_marks & IRE_MARK_USESRC_CHECK)) { 30247c478bd9Sstevel@tonic-gate if (stq_ill->ill_usesrc_ifindex != 0) { 30257c478bd9Sstevel@tonic-gate ASSERT(stq_ill->ill_usesrc_grp_next != NULL); 30267c478bd9Sstevel@tonic-gate if ((ipif_ill->ill_phyint->phyint_ifindex != 30277c478bd9Sstevel@tonic-gate stq_ill->ill_usesrc_ifindex) || 30287c478bd9Sstevel@tonic-gate (ipif_ill->ill_usesrc_grp_next == NULL) || 30297c478bd9Sstevel@tonic-gate (ipif_ill->ill_usesrc_ifindex != 0)) { 30307c478bd9Sstevel@tonic-gate error = EINVAL; 30317c478bd9Sstevel@tonic-gate goto done; 30327c478bd9Sstevel@tonic-gate } 30337c478bd9Sstevel@tonic-gate } else if (ipif_ill->ill_usesrc_grp_next != NULL) { 30347c478bd9Sstevel@tonic-gate error = EINVAL; 30357c478bd9Sstevel@tonic-gate goto done; 30367c478bd9Sstevel@tonic-gate } 30377c478bd9Sstevel@tonic-gate } 30387c478bd9Sstevel@tonic-gate 30397c478bd9Sstevel@tonic-gate /* 30407c478bd9Sstevel@tonic-gate * IPMP flag settings happen without taking the exclusive route 30417c478bd9Sstevel@tonic-gate * in ip_sioctl_flags. So we need to make an atomic check here 30427c478bd9Sstevel@tonic-gate * for FAILED/OFFLINE/INACTIVE flags or if it has hit the 30437c478bd9Sstevel@tonic-gate * FAILBACK=no case. 30447c478bd9Sstevel@tonic-gate */ 30457c478bd9Sstevel@tonic-gate if ((stq_ill != NULL) && !IAM_WRITER_ILL(stq_ill)) { 30467c478bd9Sstevel@tonic-gate if (stq_ill->ill_state_flags & ILL_CHANGING) { 30477c478bd9Sstevel@tonic-gate ill = stq_ill; 30487c478bd9Sstevel@tonic-gate error = EAGAIN; 30497c478bd9Sstevel@tonic-gate } else if ((stq_ill->ill_phyint->phyint_flags & PHYI_OFFLINE) || 30507c478bd9Sstevel@tonic-gate (ill_is_probeonly(stq_ill) && 30517c478bd9Sstevel@tonic-gate !(ire->ire_marks & IRE_MARK_HIDDEN))) { 30527c478bd9Sstevel@tonic-gate error = EINVAL; 30537c478bd9Sstevel@tonic-gate } 30547c478bd9Sstevel@tonic-gate goto done; 30557c478bd9Sstevel@tonic-gate } 30567c478bd9Sstevel@tonic-gate 30577c478bd9Sstevel@tonic-gate /* 30587c478bd9Sstevel@tonic-gate * We don't check for OFFLINE/FAILED in this case because 30597c478bd9Sstevel@tonic-gate * the source address selection logic (ipif_select_source) 30607c478bd9Sstevel@tonic-gate * may still select a source address from such an ill. The 30617c478bd9Sstevel@tonic-gate * assumption is that these addresses will be moved by in.mpathd 30627c478bd9Sstevel@tonic-gate * soon. (i.e. this is a race). However link local addresses 30637c478bd9Sstevel@tonic-gate * will not move and hence ipif_select_source_v6 tries to avoid 30647c478bd9Sstevel@tonic-gate * FAILED ills. Please see ipif_select_source_v6 for more info 30657c478bd9Sstevel@tonic-gate */ 30667c478bd9Sstevel@tonic-gate if ((ipif_ill != NULL) && !IAM_WRITER_ILL(ipif_ill) && 30677c478bd9Sstevel@tonic-gate (ipif_ill->ill_state_flags & ILL_CHANGING)) { 30687c478bd9Sstevel@tonic-gate ill = ipif_ill; 30697c478bd9Sstevel@tonic-gate error = EAGAIN; 30707c478bd9Sstevel@tonic-gate goto done; 30717c478bd9Sstevel@tonic-gate } 30727c478bd9Sstevel@tonic-gate 30737c478bd9Sstevel@tonic-gate if ((in_ill != NULL) && !IAM_WRITER_ILL(in_ill) && 30747c478bd9Sstevel@tonic-gate (in_ill->ill_state_flags & ILL_CHANGING)) { 30757c478bd9Sstevel@tonic-gate ill = in_ill; 30767c478bd9Sstevel@tonic-gate error = EAGAIN; 30777c478bd9Sstevel@tonic-gate goto done; 30787c478bd9Sstevel@tonic-gate } 30797c478bd9Sstevel@tonic-gate 30807c478bd9Sstevel@tonic-gate if ((ire->ire_ipif != NULL) && !IAM_WRITER_IPIF(ire->ire_ipif) && 30817c478bd9Sstevel@tonic-gate (ire->ire_ipif->ipif_state_flags & IPIF_CHANGING)) { 30827c478bd9Sstevel@tonic-gate ill = ire->ire_ipif->ipif_ill; 30837c478bd9Sstevel@tonic-gate ASSERT(ill != NULL); 30847c478bd9Sstevel@tonic-gate error = EAGAIN; 30857c478bd9Sstevel@tonic-gate goto done; 30867c478bd9Sstevel@tonic-gate } 30877c478bd9Sstevel@tonic-gate 30887c478bd9Sstevel@tonic-gate done: 30897c478bd9Sstevel@tonic-gate if (error == EAGAIN && ILL_CAN_WAIT(ill, q)) { 30907c478bd9Sstevel@tonic-gate ipsq_t *ipsq = ill->ill_phyint->phyint_ipsq; 30917c478bd9Sstevel@tonic-gate mutex_enter(&ipsq->ipsq_lock); 30927c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 30937c478bd9Sstevel@tonic-gate ipsq_enq(ipsq, q, mp, func, NEW_OP, ill); 30947c478bd9Sstevel@tonic-gate mutex_exit(&ipsq->ipsq_lock); 30957c478bd9Sstevel@tonic-gate error = EINPROGRESS; 30967c478bd9Sstevel@tonic-gate } else if (error != 0) { 30977c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 30987c478bd9Sstevel@tonic-gate } 30997c478bd9Sstevel@tonic-gate 31007c478bd9Sstevel@tonic-gate RELEASE_CONN_LOCK(q); 31017c478bd9Sstevel@tonic-gate return (error); 31027c478bd9Sstevel@tonic-gate } 31037c478bd9Sstevel@tonic-gate 31047c478bd9Sstevel@tonic-gate /* 31057c478bd9Sstevel@tonic-gate * Add a fully initialized IRE to an appropriate table based on 31067c478bd9Sstevel@tonic-gate * ire_type. 3107c793af95Ssangeeta * 3108c793af95Ssangeeta * allow_unresolved == B_FALSE indicates a legacy code-path call 3109c793af95Ssangeeta * that has prohibited the addition of incomplete ire's. If this 3110c793af95Ssangeeta * parameter is set, and we find an nce that is in a state other 3111c793af95Ssangeeta * than ND_REACHABLE, we fail the add. Note that nce_state could be 3112c793af95Ssangeeta * something other than ND_REACHABLE if nce_reinit has just 3113c793af95Ssangeeta * kicked in and reset the nce. 31147c478bd9Sstevel@tonic-gate */ 31157c478bd9Sstevel@tonic-gate int 3116c793af95Ssangeeta ire_add(ire_t **irep, queue_t *q, mblk_t *mp, ipsq_func_t func, 3117c793af95Ssangeeta boolean_t allow_unresolved) 31187c478bd9Sstevel@tonic-gate { 31197c478bd9Sstevel@tonic-gate ire_t *ire1; 31207c478bd9Sstevel@tonic-gate ill_t *stq_ill = NULL; 31217c478bd9Sstevel@tonic-gate ill_t *ill; 31227c478bd9Sstevel@tonic-gate ipif_t *ipif = NULL; 31237c478bd9Sstevel@tonic-gate ill_walk_context_t ctx; 31247c478bd9Sstevel@tonic-gate ire_t *ire = *irep; 31257c478bd9Sstevel@tonic-gate int error; 3126dc3879f9Sjarrett boolean_t ire_is_mblk = B_FALSE; 3127dc3879f9Sjarrett tsol_gcgrp_t *gcgrp = NULL; 3128dc3879f9Sjarrett tsol_gcgrp_addr_t ga; 31297c478bd9Sstevel@tonic-gate 31307c478bd9Sstevel@tonic-gate ASSERT(ire->ire_type != IRE_MIPRTUN); 31317c478bd9Sstevel@tonic-gate 31327c478bd9Sstevel@tonic-gate /* get ready for the day when original ire is not created as mblk */ 31337c478bd9Sstevel@tonic-gate if (ire->ire_mp != NULL) { 3134dc3879f9Sjarrett ire_is_mblk = B_TRUE; 31357c478bd9Sstevel@tonic-gate /* Copy the ire to a kmem_alloc'ed area */ 31367c478bd9Sstevel@tonic-gate ire1 = kmem_cache_alloc(ire_cache, KM_NOSLEEP); 31377c478bd9Sstevel@tonic-gate if (ire1 == NULL) { 31387c478bd9Sstevel@tonic-gate ip1dbg(("ire_add: alloc failed\n")); 31397c478bd9Sstevel@tonic-gate ire_delete(ire); 31407c478bd9Sstevel@tonic-gate *irep = NULL; 31417c478bd9Sstevel@tonic-gate return (ENOMEM); 31427c478bd9Sstevel@tonic-gate } 3143c793af95Ssangeeta ire->ire_marks &= ~IRE_MARK_UNCACHED; 31447c478bd9Sstevel@tonic-gate *ire1 = *ire; 31457c478bd9Sstevel@tonic-gate ire1->ire_mp = NULL; 3146c793af95Ssangeeta ire1->ire_stq_ifindex = 0; 31477c478bd9Sstevel@tonic-gate freeb(ire->ire_mp); 31487c478bd9Sstevel@tonic-gate ire = ire1; 31497c478bd9Sstevel@tonic-gate } 31507c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) 31517c478bd9Sstevel@tonic-gate stq_ill = (ill_t *)ire->ire_stq->q_ptr; 31527c478bd9Sstevel@tonic-gate 31537c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE) { 31547c478bd9Sstevel@tonic-gate /* 31557c478bd9Sstevel@tonic-gate * If this interface is FAILED, or INACTIVE or has hit 31567c478bd9Sstevel@tonic-gate * the FAILBACK=no case, we create IRE_CACHES marked 31577c478bd9Sstevel@tonic-gate * HIDDEN for some special cases e.g. bind to 31587c478bd9Sstevel@tonic-gate * IPIF_NOFAILOVER address etc. So, if this interface 31597c478bd9Sstevel@tonic-gate * is FAILED/INACTIVE/hit FAILBACK=no case, and we are 31607c478bd9Sstevel@tonic-gate * not creating hidden ires, we should not allow that. 31617c478bd9Sstevel@tonic-gate * This happens because the state of the interface 31627c478bd9Sstevel@tonic-gate * changed while we were waiting in ARP. If this is the 31637c478bd9Sstevel@tonic-gate * daemon sending probes, the next probe will create 31647c478bd9Sstevel@tonic-gate * HIDDEN ires and we will create an ire then. This 31657c478bd9Sstevel@tonic-gate * cannot happen with NDP currently because IRE is 31667c478bd9Sstevel@tonic-gate * never queued in NDP. But it can happen in the 31677c478bd9Sstevel@tonic-gate * future when we have external resolvers with IPv6. 31687c478bd9Sstevel@tonic-gate * If the interface gets marked with OFFLINE while we 31697c478bd9Sstevel@tonic-gate * are waiting in ARP, don't add the ire. 31707c478bd9Sstevel@tonic-gate */ 31717c478bd9Sstevel@tonic-gate if ((stq_ill->ill_phyint->phyint_flags & PHYI_OFFLINE) || 31727c478bd9Sstevel@tonic-gate (ill_is_probeonly(stq_ill) && 31737c478bd9Sstevel@tonic-gate !(ire->ire_marks & IRE_MARK_HIDDEN))) { 31747c478bd9Sstevel@tonic-gate /* 31757c478bd9Sstevel@tonic-gate * We don't know whether it is a valid ipif or not. 31767c478bd9Sstevel@tonic-gate * unless we do the check below. So, set it to NULL. 31777c478bd9Sstevel@tonic-gate */ 31787c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 31797c478bd9Sstevel@tonic-gate ire_delete(ire); 31807c478bd9Sstevel@tonic-gate *irep = NULL; 31817c478bd9Sstevel@tonic-gate return (EINVAL); 31827c478bd9Sstevel@tonic-gate } 31837c478bd9Sstevel@tonic-gate } 31847c478bd9Sstevel@tonic-gate 31857c478bd9Sstevel@tonic-gate if (stq_ill != NULL && ire->ire_type == IRE_CACHE && 31867c478bd9Sstevel@tonic-gate stq_ill->ill_net_type == IRE_IF_RESOLVER) { 31877c478bd9Sstevel@tonic-gate rw_enter(&ill_g_lock, RW_READER); 31887c478bd9Sstevel@tonic-gate ill = ILL_START_WALK_ALL(&ctx); 31897c478bd9Sstevel@tonic-gate for (; ill != NULL; ill = ill_next(&ctx, ill)) { 31907c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 31917c478bd9Sstevel@tonic-gate if (ill->ill_state_flags & ILL_CONDEMNED) { 31927c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 31937c478bd9Sstevel@tonic-gate continue; 31947c478bd9Sstevel@tonic-gate } 31957c478bd9Sstevel@tonic-gate /* 31967c478bd9Sstevel@tonic-gate * We need to make sure that the ipif is a valid one 31977c478bd9Sstevel@tonic-gate * before adding the IRE_CACHE. This happens only 31987c478bd9Sstevel@tonic-gate * with IRE_CACHE when there is an external resolver. 31997c478bd9Sstevel@tonic-gate * 32007c478bd9Sstevel@tonic-gate * We can unplumb a logical interface while the 32017c478bd9Sstevel@tonic-gate * packet is waiting in ARP with the IRE. Then, 32027c478bd9Sstevel@tonic-gate * later on when we feed the IRE back, the ipif 32037c478bd9Sstevel@tonic-gate * has to be re-checked. This can't happen with 32047c478bd9Sstevel@tonic-gate * NDP currently, as we never queue the IRE with 32057c478bd9Sstevel@tonic-gate * the packet. We always try to recreate the IRE 32067c478bd9Sstevel@tonic-gate * when the resolution is completed. But, we do 32077c478bd9Sstevel@tonic-gate * it for IPv6 also here so that in future if 32087c478bd9Sstevel@tonic-gate * we have external resolvers, it will work without 32097c478bd9Sstevel@tonic-gate * any change. 32107c478bd9Sstevel@tonic-gate */ 32117c478bd9Sstevel@tonic-gate ipif = ipif_lookup_seqid(ill, ire->ire_ipif_seqid); 32127c478bd9Sstevel@tonic-gate if (ipif != NULL) { 32137c478bd9Sstevel@tonic-gate ipif_refhold_locked(ipif); 32147c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 32157c478bd9Sstevel@tonic-gate break; 32167c478bd9Sstevel@tonic-gate } 32177c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 32187c478bd9Sstevel@tonic-gate } 32197c478bd9Sstevel@tonic-gate rw_exit(&ill_g_lock); 32207c478bd9Sstevel@tonic-gate if (ipif == NULL || 32217c478bd9Sstevel@tonic-gate (ipif->ipif_isv6 && 32227c478bd9Sstevel@tonic-gate !IN6_ARE_ADDR_EQUAL(&ire->ire_src_addr_v6, 32237c478bd9Sstevel@tonic-gate &ipif->ipif_v6src_addr)) || 32247c478bd9Sstevel@tonic-gate (!ipif->ipif_isv6 && 32257c478bd9Sstevel@tonic-gate ire->ire_src_addr != ipif->ipif_src_addr) || 322645916cd2Sjpk ire->ire_zoneid != ipif->ipif_zoneid) { 32277c478bd9Sstevel@tonic-gate 32287c478bd9Sstevel@tonic-gate if (ipif != NULL) 32297c478bd9Sstevel@tonic-gate ipif_refrele(ipif); 32307c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 32317c478bd9Sstevel@tonic-gate ire_delete(ire); 32327c478bd9Sstevel@tonic-gate *irep = NULL; 32337c478bd9Sstevel@tonic-gate return (EINVAL); 32347c478bd9Sstevel@tonic-gate } 32357c478bd9Sstevel@tonic-gate 32367c478bd9Sstevel@tonic-gate 32377c478bd9Sstevel@tonic-gate ASSERT(ill != NULL); 32387c478bd9Sstevel@tonic-gate /* 32397c478bd9Sstevel@tonic-gate * If this group was dismantled while this packets was 32407c478bd9Sstevel@tonic-gate * queued in ARP, don't add it here. 32417c478bd9Sstevel@tonic-gate */ 32427c478bd9Sstevel@tonic-gate if (ire->ire_ipif->ipif_ill->ill_group != ill->ill_group) { 32437c478bd9Sstevel@tonic-gate /* We don't want ire_inactive bump stats for this */ 32447c478bd9Sstevel@tonic-gate ipif_refrele(ipif); 32457c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 32467c478bd9Sstevel@tonic-gate ire_delete(ire); 32477c478bd9Sstevel@tonic-gate *irep = NULL; 32487c478bd9Sstevel@tonic-gate return (EINVAL); 32497c478bd9Sstevel@tonic-gate } 3250dc3879f9Sjarrett 3251dc3879f9Sjarrett /* 3252dc3879f9Sjarrett * Since we didn't attach label security attributes to the 3253dc3879f9Sjarrett * ire for the resolver case, we need to add it now. (only 3254dc3879f9Sjarrett * for v4 resolver and v6 xresolv case). 3255dc3879f9Sjarrett */ 3256dc3879f9Sjarrett if (is_system_labeled() && ire_is_mblk) { 3257dc3879f9Sjarrett if (ire->ire_ipversion == IPV4_VERSION) { 3258dc3879f9Sjarrett ga.ga_af = AF_INET; 3259dc3879f9Sjarrett IN6_IPADDR_TO_V4MAPPED(ire->ire_gateway_addr != 3260dc3879f9Sjarrett INADDR_ANY ? ire->ire_gateway_addr : 3261dc3879f9Sjarrett ire->ire_addr, &ga.ga_addr); 3262dc3879f9Sjarrett } else { 3263dc3879f9Sjarrett ga.ga_af = AF_INET6; 3264dc3879f9Sjarrett ga.ga_addr = IN6_IS_ADDR_UNSPECIFIED( 3265dc3879f9Sjarrett &ire->ire_gateway_addr_v6) ? 3266dc3879f9Sjarrett ire->ire_addr_v6 : 3267dc3879f9Sjarrett ire->ire_gateway_addr_v6; 3268dc3879f9Sjarrett } 3269dc3879f9Sjarrett gcgrp = gcgrp_lookup(&ga, B_FALSE); 3270dc3879f9Sjarrett error = tsol_ire_init_gwattr(ire, ire->ire_ipversion, 3271dc3879f9Sjarrett NULL, gcgrp); 3272dc3879f9Sjarrett if (error != 0) { 3273dc3879f9Sjarrett if (gcgrp != NULL) { 3274dc3879f9Sjarrett GCGRP_REFRELE(gcgrp); 3275dc3879f9Sjarrett gcgrp = NULL; 3276dc3879f9Sjarrett } 3277dc3879f9Sjarrett ipif_refrele(ipif); 3278dc3879f9Sjarrett ire->ire_ipif = NULL; 3279dc3879f9Sjarrett ire_delete(ire); 3280dc3879f9Sjarrett *irep = NULL; 3281dc3879f9Sjarrett return (error); 3282dc3879f9Sjarrett } 3283dc3879f9Sjarrett } 32847c478bd9Sstevel@tonic-gate } 32857c478bd9Sstevel@tonic-gate 32867c478bd9Sstevel@tonic-gate /* 32877c478bd9Sstevel@tonic-gate * In case ire was changed 32887c478bd9Sstevel@tonic-gate */ 32897c478bd9Sstevel@tonic-gate *irep = ire; 32907c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 32917c478bd9Sstevel@tonic-gate error = ire_add_v6(irep, q, mp, func); 32927c478bd9Sstevel@tonic-gate } else { 32937c478bd9Sstevel@tonic-gate if (ire->ire_in_ill == NULL) 3294c793af95Ssangeeta error = ire_add_v4(irep, q, mp, func, allow_unresolved); 32957c478bd9Sstevel@tonic-gate else 32967c478bd9Sstevel@tonic-gate error = ire_add_srcif_v4(irep, q, mp, func); 32977c478bd9Sstevel@tonic-gate } 32987c478bd9Sstevel@tonic-gate if (ipif != NULL) 32997c478bd9Sstevel@tonic-gate ipif_refrele(ipif); 33007c478bd9Sstevel@tonic-gate return (error); 33017c478bd9Sstevel@tonic-gate } 33027c478bd9Sstevel@tonic-gate 33037c478bd9Sstevel@tonic-gate /* 3304dc3879f9Sjarrett * Add an initialized IRE to an appropriate table based on ire_type. 33057c478bd9Sstevel@tonic-gate * 33067c478bd9Sstevel@tonic-gate * The forward table contains IRE_PREFIX/IRE_HOST/IRE_HOST_REDIRECT 33077c478bd9Sstevel@tonic-gate * IRE_IF_RESOLVER/IRE_IF_NORESOLVER and IRE_DEFAULT. 33087c478bd9Sstevel@tonic-gate * 33097c478bd9Sstevel@tonic-gate * The cache table contains IRE_BROADCAST/IRE_LOCAL/IRE_LOOPBACK 33107c478bd9Sstevel@tonic-gate * and IRE_CACHE. 33117c478bd9Sstevel@tonic-gate * 33127c478bd9Sstevel@tonic-gate * NOTE : This function is called as writer though not required 33137c478bd9Sstevel@tonic-gate * by this function. 33147c478bd9Sstevel@tonic-gate */ 33157c478bd9Sstevel@tonic-gate static int 3316c793af95Ssangeeta ire_add_v4(ire_t **ire_p, queue_t *q, mblk_t *mp, ipsq_func_t func, 3317c793af95Ssangeeta boolean_t allow_unresolved) 33187c478bd9Sstevel@tonic-gate { 33197c478bd9Sstevel@tonic-gate ire_t *ire1; 33207c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 33217c478bd9Sstevel@tonic-gate ire_t **irep; 33227c478bd9Sstevel@tonic-gate int flags; 33237c478bd9Sstevel@tonic-gate ire_t *pire = NULL; 33247c478bd9Sstevel@tonic-gate ill_t *stq_ill; 33257c478bd9Sstevel@tonic-gate ire_t *ire = *ire_p; 33267c478bd9Sstevel@tonic-gate int error; 3327c793af95Ssangeeta boolean_t need_refrele = B_FALSE; 3328c793af95Ssangeeta nce_t *nce; 33297c478bd9Sstevel@tonic-gate 33307c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) 33317c478bd9Sstevel@tonic-gate ASSERT(!MUTEX_HELD(&ire->ire_ipif->ipif_ill->ill_lock)); 33327c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) 33337c478bd9Sstevel@tonic-gate ASSERT(!MUTEX_HELD( 33347c478bd9Sstevel@tonic-gate &((ill_t *)(ire->ire_stq->q_ptr))->ill_lock)); 33357c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 33367c478bd9Sstevel@tonic-gate ASSERT(ire->ire_mp == NULL); /* Calls should go through ire_add */ 33377c478bd9Sstevel@tonic-gate ASSERT(ire->ire_in_ill == NULL); /* No srcif entries */ 33387c478bd9Sstevel@tonic-gate 33397c478bd9Sstevel@tonic-gate /* Find the appropriate list head. */ 33407c478bd9Sstevel@tonic-gate switch (ire->ire_type) { 33417c478bd9Sstevel@tonic-gate case IRE_HOST: 33427c478bd9Sstevel@tonic-gate ire->ire_mask = IP_HOST_MASK; 33437c478bd9Sstevel@tonic-gate ire->ire_masklen = IP_ABITS; 33447c478bd9Sstevel@tonic-gate if ((ire->ire_flags & RTF_SETSRC) == 0) 33457c478bd9Sstevel@tonic-gate ire->ire_src_addr = 0; 33467c478bd9Sstevel@tonic-gate break; 33477c478bd9Sstevel@tonic-gate case IRE_HOST_REDIRECT: 33487c478bd9Sstevel@tonic-gate ire->ire_mask = IP_HOST_MASK; 33497c478bd9Sstevel@tonic-gate ire->ire_masklen = IP_ABITS; 33507c478bd9Sstevel@tonic-gate ire->ire_src_addr = 0; 33517c478bd9Sstevel@tonic-gate break; 33527c478bd9Sstevel@tonic-gate case IRE_CACHE: 33537c478bd9Sstevel@tonic-gate case IRE_BROADCAST: 33547c478bd9Sstevel@tonic-gate case IRE_LOCAL: 33557c478bd9Sstevel@tonic-gate case IRE_LOOPBACK: 33567c478bd9Sstevel@tonic-gate ire->ire_mask = IP_HOST_MASK; 33577c478bd9Sstevel@tonic-gate ire->ire_masklen = IP_ABITS; 33587c478bd9Sstevel@tonic-gate break; 33597c478bd9Sstevel@tonic-gate case IRE_PREFIX: 33607c478bd9Sstevel@tonic-gate if ((ire->ire_flags & RTF_SETSRC) == 0) 33617c478bd9Sstevel@tonic-gate ire->ire_src_addr = 0; 33627c478bd9Sstevel@tonic-gate break; 33637c478bd9Sstevel@tonic-gate case IRE_DEFAULT: 33647c478bd9Sstevel@tonic-gate if ((ire->ire_flags & RTF_SETSRC) == 0) 33657c478bd9Sstevel@tonic-gate ire->ire_src_addr = 0; 33667c478bd9Sstevel@tonic-gate break; 33677c478bd9Sstevel@tonic-gate case IRE_IF_RESOLVER: 33687c478bd9Sstevel@tonic-gate case IRE_IF_NORESOLVER: 33697c478bd9Sstevel@tonic-gate break; 33707c478bd9Sstevel@tonic-gate default: 3371c793af95Ssangeeta ip0dbg(("ire_add_v4: ire %p has unrecognized IRE type (%d)\n", 3372c793af95Ssangeeta (void *)ire, ire->ire_type)); 33737c478bd9Sstevel@tonic-gate ire_delete(ire); 33747c478bd9Sstevel@tonic-gate *ire_p = NULL; 33757c478bd9Sstevel@tonic-gate return (EINVAL); 33767c478bd9Sstevel@tonic-gate } 33777c478bd9Sstevel@tonic-gate 33787c478bd9Sstevel@tonic-gate /* Make sure the address is properly masked. */ 33797c478bd9Sstevel@tonic-gate ire->ire_addr &= ire->ire_mask; 33807c478bd9Sstevel@tonic-gate 33817c478bd9Sstevel@tonic-gate /* 33827c478bd9Sstevel@tonic-gate * ip_newroute/ip_newroute_multi are unable to prevent the deletion 33837c478bd9Sstevel@tonic-gate * of the interface route while adding an IRE_CACHE for an on-link 33847c478bd9Sstevel@tonic-gate * destination in the IRE_IF_RESOLVER case, since the ire has to 33857c478bd9Sstevel@tonic-gate * go to ARP and return. We can't do a REFHOLD on the 33867c478bd9Sstevel@tonic-gate * associated interface ire for fear of ARP freeing the message. 33877c478bd9Sstevel@tonic-gate * Here we look up the interface ire in the forwarding table and 33887c478bd9Sstevel@tonic-gate * make sure that the interface route has not been deleted. 33897c478bd9Sstevel@tonic-gate */ 33907c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE && ire->ire_gateway_addr == 0 && 33917c478bd9Sstevel@tonic-gate ((ill_t *)ire->ire_stq->q_ptr)->ill_net_type == IRE_IF_RESOLVER) { 3392c793af95Ssangeeta 33937c478bd9Sstevel@tonic-gate ASSERT(ire->ire_max_fragp == NULL); 33947c478bd9Sstevel@tonic-gate if (CLASSD(ire->ire_addr) && !(ire->ire_flags & RTF_SETSRC)) { 33957c478bd9Sstevel@tonic-gate /* 33967c478bd9Sstevel@tonic-gate * The ihandle that we used in ip_newroute_multi 33977c478bd9Sstevel@tonic-gate * comes from the interface route corresponding 33987c478bd9Sstevel@tonic-gate * to ire_ipif. Lookup here to see if it exists 33997c478bd9Sstevel@tonic-gate * still. 34007c478bd9Sstevel@tonic-gate * If the ire has a source address assigned using 34017c478bd9Sstevel@tonic-gate * RTF_SETSRC, ire_ipif is the logical interface holding 34027c478bd9Sstevel@tonic-gate * this source address, so we can't use it to check for 34037c478bd9Sstevel@tonic-gate * the existence of the interface route. Instead we rely 34047c478bd9Sstevel@tonic-gate * on the brute force ihandle search in 34057c478bd9Sstevel@tonic-gate * ire_ihandle_lookup_onlink() below. 34067c478bd9Sstevel@tonic-gate */ 34077c478bd9Sstevel@tonic-gate pire = ipif_to_ire(ire->ire_ipif); 34087c478bd9Sstevel@tonic-gate if (pire == NULL) { 34097c478bd9Sstevel@tonic-gate ire_delete(ire); 34107c478bd9Sstevel@tonic-gate *ire_p = NULL; 34117c478bd9Sstevel@tonic-gate return (EINVAL); 34127c478bd9Sstevel@tonic-gate } else if (pire->ire_ihandle != ire->ire_ihandle) { 34137c478bd9Sstevel@tonic-gate ire_refrele(pire); 34147c478bd9Sstevel@tonic-gate ire_delete(ire); 34157c478bd9Sstevel@tonic-gate *ire_p = NULL; 34167c478bd9Sstevel@tonic-gate return (EINVAL); 34177c478bd9Sstevel@tonic-gate } 34187c478bd9Sstevel@tonic-gate } else { 34197c478bd9Sstevel@tonic-gate pire = ire_ihandle_lookup_onlink(ire); 34207c478bd9Sstevel@tonic-gate if (pire == NULL) { 34217c478bd9Sstevel@tonic-gate ire_delete(ire); 34227c478bd9Sstevel@tonic-gate *ire_p = NULL; 34237c478bd9Sstevel@tonic-gate return (EINVAL); 34247c478bd9Sstevel@tonic-gate } 34257c478bd9Sstevel@tonic-gate } 34267c478bd9Sstevel@tonic-gate /* Prevent pire from getting deleted */ 34277c478bd9Sstevel@tonic-gate IRB_REFHOLD(pire->ire_bucket); 34287c478bd9Sstevel@tonic-gate /* Has it been removed already ? */ 34297c478bd9Sstevel@tonic-gate if (pire->ire_marks & IRE_MARK_CONDEMNED) { 34307c478bd9Sstevel@tonic-gate IRB_REFRELE(pire->ire_bucket); 34317c478bd9Sstevel@tonic-gate ire_refrele(pire); 34327c478bd9Sstevel@tonic-gate ire_delete(ire); 34337c478bd9Sstevel@tonic-gate *ire_p = NULL; 34347c478bd9Sstevel@tonic-gate return (EINVAL); 34357c478bd9Sstevel@tonic-gate } 34367c478bd9Sstevel@tonic-gate } else { 34377c478bd9Sstevel@tonic-gate ASSERT(ire->ire_max_fragp != NULL); 34387c478bd9Sstevel@tonic-gate } 34397c478bd9Sstevel@tonic-gate flags = (MATCH_IRE_MASK | MATCH_IRE_TYPE | MATCH_IRE_GW); 34407c478bd9Sstevel@tonic-gate 34417c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) { 34427c478bd9Sstevel@tonic-gate /* 34437c478bd9Sstevel@tonic-gate * We use MATCH_IRE_IPIF while adding IRE_CACHES only 34447c478bd9Sstevel@tonic-gate * for historic reasons and to maintain symmetry with 34457c478bd9Sstevel@tonic-gate * IPv6 code path. Historically this was used by 34467c478bd9Sstevel@tonic-gate * multicast code to create multiple IRE_CACHES on 34477c478bd9Sstevel@tonic-gate * a single ill with different ipifs. This was used 34487c478bd9Sstevel@tonic-gate * so that multicast packets leaving the node had the 34497c478bd9Sstevel@tonic-gate * right source address. This is no longer needed as 34507c478bd9Sstevel@tonic-gate * ip_wput initializes the address correctly. 34517c478bd9Sstevel@tonic-gate */ 34527c478bd9Sstevel@tonic-gate flags |= MATCH_IRE_IPIF; 34537c478bd9Sstevel@tonic-gate /* 34547c478bd9Sstevel@tonic-gate * If we are creating hidden ires, make sure we search on 34557c478bd9Sstevel@tonic-gate * this ill (MATCH_IRE_ILL) and a hidden ire, 34567c478bd9Sstevel@tonic-gate * while we are searching for duplicates below. Otherwise we 34577c478bd9Sstevel@tonic-gate * could potentially find an IRE on some other interface 34587c478bd9Sstevel@tonic-gate * and it may not be a IRE marked with IRE_MARK_HIDDEN. We 34597c478bd9Sstevel@tonic-gate * shouldn't do this as this will lead to an infinite loop 34607c478bd9Sstevel@tonic-gate * (if we get to ip_wput again) eventually we need an hidden 34617c478bd9Sstevel@tonic-gate * ire for this packet to go out. MATCH_IRE_ILL is explicitly 34627c478bd9Sstevel@tonic-gate * done below. 34637c478bd9Sstevel@tonic-gate */ 34647c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE && 34657c478bd9Sstevel@tonic-gate (ire->ire_marks & IRE_MARK_HIDDEN)) 34667c478bd9Sstevel@tonic-gate flags |= (MATCH_IRE_MARK_HIDDEN); 34677c478bd9Sstevel@tonic-gate } 3468c793af95Ssangeeta if ((ire->ire_type & IRE_CACHETABLE) == 0) { 3469c793af95Ssangeeta irb_ptr = ire_get_bucket(ire); 3470c793af95Ssangeeta need_refrele = B_TRUE; 3471c793af95Ssangeeta if (irb_ptr == NULL) { 3472c793af95Ssangeeta /* 3473c793af95Ssangeeta * This assumes that the ire has not added 3474c793af95Ssangeeta * a reference to the ipif. 3475c793af95Ssangeeta */ 3476c793af95Ssangeeta ire->ire_ipif = NULL; 3477c793af95Ssangeeta ire_delete(ire); 3478c793af95Ssangeeta if (pire != NULL) { 3479c793af95Ssangeeta IRB_REFRELE(pire->ire_bucket); 3480c793af95Ssangeeta ire_refrele(pire); 3481c793af95Ssangeeta } 3482c793af95Ssangeeta *ire_p = NULL; 3483c793af95Ssangeeta return (EINVAL); 3484c793af95Ssangeeta } 3485c793af95Ssangeeta } else { 3486c793af95Ssangeeta irb_ptr = &(ip_cache_table[IRE_ADDR_HASH(ire->ire_addr, 3487c793af95Ssangeeta ip_cache_table_size)]); 3488c793af95Ssangeeta } 34897c478bd9Sstevel@tonic-gate 34907c478bd9Sstevel@tonic-gate /* 34917c478bd9Sstevel@tonic-gate * Start the atomic add of the ire. Grab the ill locks, 34927c478bd9Sstevel@tonic-gate * ill_g_usesrc_lock and the bucket lock. Check for condemned 34937c478bd9Sstevel@tonic-gate * 34947c478bd9Sstevel@tonic-gate * If ipif or ill is changing ire_atomic_start() may queue the 34957c478bd9Sstevel@tonic-gate * request and return EINPROGRESS. 3496c793af95Ssangeeta * To avoid lock order problems, get the ndp4.ndp_g_lock. 34977c478bd9Sstevel@tonic-gate */ 3498c793af95Ssangeeta mutex_enter(&ndp4.ndp_g_lock); 34997c478bd9Sstevel@tonic-gate error = ire_atomic_start(irb_ptr, ire, q, mp, func); 35007c478bd9Sstevel@tonic-gate if (error != 0) { 3501c793af95Ssangeeta mutex_exit(&ndp4.ndp_g_lock); 35027c478bd9Sstevel@tonic-gate /* 35037c478bd9Sstevel@tonic-gate * We don't know whether it is a valid ipif or not. 35047c478bd9Sstevel@tonic-gate * So, set it to NULL. This assumes that the ire has not added 35057c478bd9Sstevel@tonic-gate * a reference to the ipif. 35067c478bd9Sstevel@tonic-gate */ 35077c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 35087c478bd9Sstevel@tonic-gate ire_delete(ire); 35097c478bd9Sstevel@tonic-gate if (pire != NULL) { 35107c478bd9Sstevel@tonic-gate IRB_REFRELE(pire->ire_bucket); 35117c478bd9Sstevel@tonic-gate ire_refrele(pire); 35127c478bd9Sstevel@tonic-gate } 35137c478bd9Sstevel@tonic-gate *ire_p = NULL; 3514c793af95Ssangeeta if (need_refrele) 3515c793af95Ssangeeta IRB_REFRELE(irb_ptr); 35167c478bd9Sstevel@tonic-gate return (error); 35177c478bd9Sstevel@tonic-gate } 35187c478bd9Sstevel@tonic-gate /* 35197c478bd9Sstevel@tonic-gate * To avoid creating ires having stale values for the ire_max_frag 35207c478bd9Sstevel@tonic-gate * we get the latest value atomically here. For more details 35217c478bd9Sstevel@tonic-gate * see the block comment in ip_sioctl_mtu and in DL_NOTE_SDU_CHANGE 35227c478bd9Sstevel@tonic-gate * in ip_rput_dlpi_writer 35237c478bd9Sstevel@tonic-gate */ 35247c478bd9Sstevel@tonic-gate if (ire->ire_max_fragp == NULL) { 35257c478bd9Sstevel@tonic-gate if (CLASSD(ire->ire_addr)) 35267c478bd9Sstevel@tonic-gate ire->ire_max_frag = ire->ire_ipif->ipif_mtu; 35277c478bd9Sstevel@tonic-gate else 35287c478bd9Sstevel@tonic-gate ire->ire_max_frag = pire->ire_max_frag; 35297c478bd9Sstevel@tonic-gate } else { 35307c478bd9Sstevel@tonic-gate uint_t max_frag; 35317c478bd9Sstevel@tonic-gate 35327c478bd9Sstevel@tonic-gate max_frag = *ire->ire_max_fragp; 35337c478bd9Sstevel@tonic-gate ire->ire_max_fragp = NULL; 35347c478bd9Sstevel@tonic-gate ire->ire_max_frag = max_frag; 35357c478bd9Sstevel@tonic-gate } 35367c478bd9Sstevel@tonic-gate /* 35377c478bd9Sstevel@tonic-gate * Atomically check for duplicate and insert in the table. 35387c478bd9Sstevel@tonic-gate */ 35397c478bd9Sstevel@tonic-gate for (ire1 = irb_ptr->irb_ire; ire1 != NULL; ire1 = ire1->ire_next) { 35407c478bd9Sstevel@tonic-gate if (ire1->ire_marks & IRE_MARK_CONDEMNED) 35417c478bd9Sstevel@tonic-gate continue; 35427c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) { 35437c478bd9Sstevel@tonic-gate /* 35447c478bd9Sstevel@tonic-gate * We do MATCH_IRE_ILL implicitly here for IREs 35457c478bd9Sstevel@tonic-gate * with a non-null ire_ipif, including IRE_CACHEs. 35467c478bd9Sstevel@tonic-gate * As ire_ipif and ire_stq could point to two 35477c478bd9Sstevel@tonic-gate * different ills, we can't pass just ire_ipif to 35487c478bd9Sstevel@tonic-gate * ire_match_args and get a match on both ills. 35497c478bd9Sstevel@tonic-gate * This is just needed for duplicate checks here and 35507c478bd9Sstevel@tonic-gate * so we don't add an extra argument to 35517c478bd9Sstevel@tonic-gate * ire_match_args for this. Do it locally. 35527c478bd9Sstevel@tonic-gate * 35537c478bd9Sstevel@tonic-gate * NOTE : Currently there is no part of the code 35547c478bd9Sstevel@tonic-gate * that asks for both MATH_IRE_IPIF and MATCH_IRE_ILL 35557c478bd9Sstevel@tonic-gate * match for IRE_CACHEs. Thus we don't want to 35567c478bd9Sstevel@tonic-gate * extend the arguments to ire_match_args. 35577c478bd9Sstevel@tonic-gate */ 35587c478bd9Sstevel@tonic-gate if (ire1->ire_stq != ire->ire_stq) 35597c478bd9Sstevel@tonic-gate continue; 35607c478bd9Sstevel@tonic-gate /* 35617c478bd9Sstevel@tonic-gate * Multiroute IRE_CACHEs for a given destination can 35627c478bd9Sstevel@tonic-gate * have the same ire_ipif, typically if their source 35637c478bd9Sstevel@tonic-gate * address is forced using RTF_SETSRC, and the same 35647c478bd9Sstevel@tonic-gate * send-to queue. We differentiate them using the parent 35657c478bd9Sstevel@tonic-gate * handle. 35667c478bd9Sstevel@tonic-gate */ 35677c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE && 35687c478bd9Sstevel@tonic-gate (ire1->ire_flags & RTF_MULTIRT) && 35697c478bd9Sstevel@tonic-gate (ire->ire_flags & RTF_MULTIRT) && 35707c478bd9Sstevel@tonic-gate (ire1->ire_phandle != ire->ire_phandle)) 35717c478bd9Sstevel@tonic-gate continue; 35727c478bd9Sstevel@tonic-gate } 35737c478bd9Sstevel@tonic-gate if (ire1->ire_zoneid != ire->ire_zoneid) 35747c478bd9Sstevel@tonic-gate continue; 35757c478bd9Sstevel@tonic-gate if (ire_match_args(ire1, ire->ire_addr, ire->ire_mask, 35767c478bd9Sstevel@tonic-gate ire->ire_gateway_addr, ire->ire_type, ire->ire_ipif, 357745916cd2Sjpk ire->ire_zoneid, 0, NULL, flags)) { 35787c478bd9Sstevel@tonic-gate /* 35797c478bd9Sstevel@tonic-gate * Return the old ire after doing a REFHOLD. 35807c478bd9Sstevel@tonic-gate * As most of the callers continue to use the IRE 35817c478bd9Sstevel@tonic-gate * after adding, we return a held ire. This will 35827c478bd9Sstevel@tonic-gate * avoid a lookup in the caller again. If the callers 35837c478bd9Sstevel@tonic-gate * don't want to use it, they need to do a REFRELE. 35847c478bd9Sstevel@tonic-gate */ 35857c478bd9Sstevel@tonic-gate ip1dbg(("found dup ire existing %p new %p", 35867c478bd9Sstevel@tonic-gate (void *)ire1, (void *)ire)); 35877c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire1); 35887c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 3589c793af95Ssangeeta mutex_exit(&ndp4.ndp_g_lock); 35907c478bd9Sstevel@tonic-gate ire_delete(ire); 35917c478bd9Sstevel@tonic-gate if (pire != NULL) { 35927c478bd9Sstevel@tonic-gate /* 35937c478bd9Sstevel@tonic-gate * Assert that it is not removed from the 35947c478bd9Sstevel@tonic-gate * list yet. 35957c478bd9Sstevel@tonic-gate */ 35967c478bd9Sstevel@tonic-gate ASSERT(pire->ire_ptpn != NULL); 35977c478bd9Sstevel@tonic-gate IRB_REFRELE(pire->ire_bucket); 35987c478bd9Sstevel@tonic-gate ire_refrele(pire); 35997c478bd9Sstevel@tonic-gate } 36007c478bd9Sstevel@tonic-gate *ire_p = ire1; 3601c793af95Ssangeeta if (need_refrele) 3602c793af95Ssangeeta IRB_REFRELE(irb_ptr); 36037c478bd9Sstevel@tonic-gate return (0); 36047c478bd9Sstevel@tonic-gate } 36057c478bd9Sstevel@tonic-gate } 3606c793af95Ssangeeta if (ire->ire_type & IRE_CACHE) { 3607c793af95Ssangeeta ASSERT(ire->ire_stq != NULL); 3608c793af95Ssangeeta nce = ndp_lookup_v4(ire_to_ill(ire), 3609c793af95Ssangeeta ((ire->ire_gateway_addr != INADDR_ANY) ? 3610c793af95Ssangeeta &ire->ire_gateway_addr : &ire->ire_addr), 3611c793af95Ssangeeta B_TRUE); 3612c793af95Ssangeeta if (nce != NULL) 3613c793af95Ssangeeta mutex_enter(&nce->nce_lock); 3614c793af95Ssangeeta /* 3615c793af95Ssangeeta * if the nce is NCE_F_CONDEMNED, or if it is not ND_REACHABLE 3616c793af95Ssangeeta * and the caller has prohibited the addition of incomplete 3617c793af95Ssangeeta * ire's, we fail the add. Note that nce_state could be 3618c793af95Ssangeeta * something other than ND_REACHABLE if nce_reinit has just 3619c793af95Ssangeeta * kicked in and reset the nce. 3620c793af95Ssangeeta */ 3621c793af95Ssangeeta if ((nce == NULL) || 3622c793af95Ssangeeta (nce->nce_flags & NCE_F_CONDEMNED) || 3623c793af95Ssangeeta (!allow_unresolved && 3624c793af95Ssangeeta ((nce->nce_state & ND_REACHABLE) == 0))) { 3625c793af95Ssangeeta if (nce != NULL) 3626c793af95Ssangeeta mutex_exit(&nce->nce_lock); 3627c793af95Ssangeeta ire_atomic_end(irb_ptr, ire); 3628c793af95Ssangeeta mutex_exit(&ndp4.ndp_g_lock); 3629c793af95Ssangeeta if (nce != NULL) 3630c793af95Ssangeeta NCE_REFRELE(nce); 3631c793af95Ssangeeta DTRACE_PROBE1(ire__no__nce, ire_t *, ire); 3632c793af95Ssangeeta ire_delete(ire); 3633c793af95Ssangeeta if (pire != NULL) { 3634c793af95Ssangeeta IRB_REFRELE(pire->ire_bucket); 3635c793af95Ssangeeta ire_refrele(pire); 3636c793af95Ssangeeta } 3637c793af95Ssangeeta *ire_p = NULL; 3638c793af95Ssangeeta if (need_refrele) 3639c793af95Ssangeeta IRB_REFRELE(irb_ptr); 3640c793af95Ssangeeta return (EINVAL); 3641c793af95Ssangeeta } else { 3642c793af95Ssangeeta ire->ire_nce = nce; 3643c793af95Ssangeeta mutex_exit(&nce->nce_lock); 3644c793af95Ssangeeta /* 3645c793af95Ssangeeta * We are associating this nce to the ire, so 3646c793af95Ssangeeta * change the nce ref taken in ndp_lookup_v4() from 3647c793af95Ssangeeta * NCE_REFHOLD to NCE_REFHOLD_NOTR 3648c793af95Ssangeeta */ 3649c793af95Ssangeeta NCE_REFHOLD_TO_REFHOLD_NOTR(ire->ire_nce); 3650c793af95Ssangeeta } 3651c793af95Ssangeeta } 36527c478bd9Sstevel@tonic-gate /* 36537c478bd9Sstevel@tonic-gate * Make it easy for ip_wput_ire() to hit multiple broadcast ires by 36547c478bd9Sstevel@tonic-gate * grouping identical addresses together on the hash chain. We also 36557c478bd9Sstevel@tonic-gate * don't want to send multiple copies out if there are two ills part 36567c478bd9Sstevel@tonic-gate * of the same group. Thus we group the ires with same addr and same 36577c478bd9Sstevel@tonic-gate * ill group together so that ip_wput_ire can easily skip all the 36587c478bd9Sstevel@tonic-gate * ires with same addr and same group after sending the first copy. 36597c478bd9Sstevel@tonic-gate * We do this only for IRE_BROADCASTs as ip_wput_ire is currently 36607c478bd9Sstevel@tonic-gate * interested in such groupings only for broadcasts. 36617c478bd9Sstevel@tonic-gate * 36627c478bd9Sstevel@tonic-gate * NOTE : If the interfaces are brought up first and then grouped, 36637c478bd9Sstevel@tonic-gate * illgrp_insert will handle it. We come here when the interfaces 36647c478bd9Sstevel@tonic-gate * are already in group and we are bringing them UP. 36657c478bd9Sstevel@tonic-gate * 36667c478bd9Sstevel@tonic-gate * Find the first entry that matches ire_addr. *irep will be null 36677c478bd9Sstevel@tonic-gate * if no match. 36687c478bd9Sstevel@tonic-gate */ 36697c478bd9Sstevel@tonic-gate irep = (ire_t **)irb_ptr; 36707c478bd9Sstevel@tonic-gate while ((ire1 = *irep) != NULL && ire->ire_addr != ire1->ire_addr) 36717c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 36727c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_BROADCAST && *irep != NULL) { 36737c478bd9Sstevel@tonic-gate /* 36747c478bd9Sstevel@tonic-gate * We found some ire (i.e *irep) with a matching addr. We 36757c478bd9Sstevel@tonic-gate * want to group ires with same addr and same ill group 36767c478bd9Sstevel@tonic-gate * together. 36777c478bd9Sstevel@tonic-gate * 36787c478bd9Sstevel@tonic-gate * First get to the entry that matches our address and 36797c478bd9Sstevel@tonic-gate * ill group i.e stop as soon as we find the first ire 36807c478bd9Sstevel@tonic-gate * matching the ill group and address. If there is only 36817c478bd9Sstevel@tonic-gate * an address match, we should walk and look for some 36827c478bd9Sstevel@tonic-gate * group match. These are some of the possible scenarios : 36837c478bd9Sstevel@tonic-gate * 36847c478bd9Sstevel@tonic-gate * 1) There are no groups at all i.e all ire's ill_group 36857c478bd9Sstevel@tonic-gate * are NULL. In that case we will essentially group 36867c478bd9Sstevel@tonic-gate * all the ires with the same addr together. Same as 36877c478bd9Sstevel@tonic-gate * the "else" block of this "if". 36887c478bd9Sstevel@tonic-gate * 36897c478bd9Sstevel@tonic-gate * 2) There are some groups and this ire's ill_group is 36907c478bd9Sstevel@tonic-gate * NULL. In this case, we will first find the group 36917c478bd9Sstevel@tonic-gate * that matches the address and a NULL group. Then 36927c478bd9Sstevel@tonic-gate * we will insert the ire at the end of that group. 36937c478bd9Sstevel@tonic-gate * 36947c478bd9Sstevel@tonic-gate * 3) There are some groups and this ires's ill_group is 36957c478bd9Sstevel@tonic-gate * non-NULL. In this case we will first find the group 36967c478bd9Sstevel@tonic-gate * that matches the address and the ill_group. Then 36977c478bd9Sstevel@tonic-gate * we will insert the ire at the end of that group. 36987c478bd9Sstevel@tonic-gate */ 36997c478bd9Sstevel@tonic-gate /* LINTED : constant in conditional context */ 37007c478bd9Sstevel@tonic-gate while (1) { 37017c478bd9Sstevel@tonic-gate ire1 = *irep; 37027c478bd9Sstevel@tonic-gate if ((ire1->ire_next == NULL) || 37037c478bd9Sstevel@tonic-gate (ire1->ire_next->ire_addr != ire->ire_addr) || 37047c478bd9Sstevel@tonic-gate (ire1->ire_type != IRE_BROADCAST) || 37057c478bd9Sstevel@tonic-gate (ire1->ire_ipif->ipif_ill->ill_group == 37067c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ill->ill_group)) 37077c478bd9Sstevel@tonic-gate break; 37087c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 37097c478bd9Sstevel@tonic-gate } 37107c478bd9Sstevel@tonic-gate ASSERT(*irep != NULL); 37117c478bd9Sstevel@tonic-gate irep = &((*irep)->ire_next); 37127c478bd9Sstevel@tonic-gate 37137c478bd9Sstevel@tonic-gate /* 37147c478bd9Sstevel@tonic-gate * Either we have hit the end of the list or the address 37157c478bd9Sstevel@tonic-gate * did not match or the group *matched*. If we found 37167c478bd9Sstevel@tonic-gate * a match on the group, skip to the end of the group. 37177c478bd9Sstevel@tonic-gate */ 37187c478bd9Sstevel@tonic-gate while (*irep != NULL) { 37197c478bd9Sstevel@tonic-gate ire1 = *irep; 37207c478bd9Sstevel@tonic-gate if ((ire1->ire_addr != ire->ire_addr) || 37217c478bd9Sstevel@tonic-gate (ire1->ire_type != IRE_BROADCAST) || 37227c478bd9Sstevel@tonic-gate (ire1->ire_ipif->ipif_ill->ill_group != 37237c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ill->ill_group)) 37247c478bd9Sstevel@tonic-gate break; 37257c478bd9Sstevel@tonic-gate if (ire1->ire_ipif->ipif_ill->ill_group == NULL && 37267c478bd9Sstevel@tonic-gate ire1->ire_ipif == ire->ire_ipif) { 37277c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 37287c478bd9Sstevel@tonic-gate break; 37297c478bd9Sstevel@tonic-gate } 37307c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 37317c478bd9Sstevel@tonic-gate } 37327c478bd9Sstevel@tonic-gate } else if (*irep != NULL) { 37337c478bd9Sstevel@tonic-gate /* 37347c478bd9Sstevel@tonic-gate * Find the last ire which matches ire_addr. 37357c478bd9Sstevel@tonic-gate * Needed to do tail insertion among entries with the same 37367c478bd9Sstevel@tonic-gate * ire_addr. 37377c478bd9Sstevel@tonic-gate */ 37387c478bd9Sstevel@tonic-gate while (ire->ire_addr == ire1->ire_addr) { 37397c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 37407c478bd9Sstevel@tonic-gate ire1 = *irep; 37417c478bd9Sstevel@tonic-gate if (ire1 == NULL) 37427c478bd9Sstevel@tonic-gate break; 37437c478bd9Sstevel@tonic-gate } 37447c478bd9Sstevel@tonic-gate } 37457c478bd9Sstevel@tonic-gate 37467c478bd9Sstevel@tonic-gate /* Insert at *irep */ 37477c478bd9Sstevel@tonic-gate ire1 = *irep; 37487c478bd9Sstevel@tonic-gate if (ire1 != NULL) 37497c478bd9Sstevel@tonic-gate ire1->ire_ptpn = &ire->ire_next; 37507c478bd9Sstevel@tonic-gate ire->ire_next = ire1; 37517c478bd9Sstevel@tonic-gate /* Link the new one in. */ 37527c478bd9Sstevel@tonic-gate ire->ire_ptpn = irep; 37537c478bd9Sstevel@tonic-gate 37547c478bd9Sstevel@tonic-gate /* 37557c478bd9Sstevel@tonic-gate * ire_walk routines de-reference ire_next without holding 37567c478bd9Sstevel@tonic-gate * a lock. Before we point to the new ire, we want to make 37577c478bd9Sstevel@tonic-gate * sure the store that sets the ire_next of the new ire 37587c478bd9Sstevel@tonic-gate * reaches global visibility, so that ire_walk routines 37597c478bd9Sstevel@tonic-gate * don't see a truncated list of ires i.e if the ire_next 37607c478bd9Sstevel@tonic-gate * of the new ire gets set after we do "*irep = ire" due 37617c478bd9Sstevel@tonic-gate * to re-ordering, the ire_walk thread will see a NULL 37627c478bd9Sstevel@tonic-gate * once it accesses the ire_next of the new ire. 37637c478bd9Sstevel@tonic-gate * membar_producer() makes sure that the following store 37647c478bd9Sstevel@tonic-gate * happens *after* all of the above stores. 37657c478bd9Sstevel@tonic-gate */ 37667c478bd9Sstevel@tonic-gate membar_producer(); 37677c478bd9Sstevel@tonic-gate *irep = ire; 37687c478bd9Sstevel@tonic-gate ire->ire_bucket = irb_ptr; 37697c478bd9Sstevel@tonic-gate /* 37707c478bd9Sstevel@tonic-gate * We return a bumped up IRE above. Keep it symmetrical 37717c478bd9Sstevel@tonic-gate * so that the callers will always have to release. This 37727c478bd9Sstevel@tonic-gate * helps the callers of this function because they continue 37737c478bd9Sstevel@tonic-gate * to use the IRE after adding and hence they don't have to 37747c478bd9Sstevel@tonic-gate * lookup again after we return the IRE. 37757c478bd9Sstevel@tonic-gate * 37767c478bd9Sstevel@tonic-gate * NOTE : We don't have to use atomics as this is appearing 37777c478bd9Sstevel@tonic-gate * in the list for the first time and no one else can bump 37787c478bd9Sstevel@tonic-gate * up the reference count on this yet. 37797c478bd9Sstevel@tonic-gate */ 37807c478bd9Sstevel@tonic-gate IRE_REFHOLD_LOCKED(ire); 37817c478bd9Sstevel@tonic-gate BUMP_IRE_STATS(ire_stats_v4, ire_stats_inserted); 3782c793af95Ssangeeta 37837c478bd9Sstevel@tonic-gate irb_ptr->irb_ire_cnt++; 3784c793af95Ssangeeta if (irb_ptr->irb_marks & IRB_MARK_FTABLE) 3785c793af95Ssangeeta irb_ptr->irb_nire++; 3786c793af95Ssangeeta 37877c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_TEMPORARY) 37887c478bd9Sstevel@tonic-gate irb_ptr->irb_tmp_ire_cnt++; 37897c478bd9Sstevel@tonic-gate 37907c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) { 37917c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ire_cnt++; 37927c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) { 37937c478bd9Sstevel@tonic-gate stq_ill = (ill_t *)ire->ire_stq->q_ptr; 37947c478bd9Sstevel@tonic-gate stq_ill->ill_ire_cnt++; 37957c478bd9Sstevel@tonic-gate } 37967c478bd9Sstevel@tonic-gate } else { 37977c478bd9Sstevel@tonic-gate ASSERT(ire->ire_stq == NULL); 37987c478bd9Sstevel@tonic-gate } 37997c478bd9Sstevel@tonic-gate 38007c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 3801c793af95Ssangeeta mutex_exit(&ndp4.ndp_g_lock); 38027c478bd9Sstevel@tonic-gate 38037c478bd9Sstevel@tonic-gate if (pire != NULL) { 38047c478bd9Sstevel@tonic-gate /* Assert that it is not removed from the list yet */ 38057c478bd9Sstevel@tonic-gate ASSERT(pire->ire_ptpn != NULL); 38067c478bd9Sstevel@tonic-gate IRB_REFRELE(pire->ire_bucket); 38077c478bd9Sstevel@tonic-gate ire_refrele(pire); 38087c478bd9Sstevel@tonic-gate } 38097c478bd9Sstevel@tonic-gate 38107c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) { 38117c478bd9Sstevel@tonic-gate /* 3812c793af95Ssangeeta * For ire's with host mask see if there is an entry 38137c478bd9Sstevel@tonic-gate * in the cache. If there is one flush the whole cache as 38147c478bd9Sstevel@tonic-gate * there might be multiple entries due to RTF_MULTIRT (CGTP). 38157c478bd9Sstevel@tonic-gate * If no entry is found than there is no need to flush the 38167c478bd9Sstevel@tonic-gate * cache. 38177c478bd9Sstevel@tonic-gate */ 38187c478bd9Sstevel@tonic-gate if (ire->ire_mask == IP_HOST_MASK) { 38197c478bd9Sstevel@tonic-gate ire_t *lire; 38207c478bd9Sstevel@tonic-gate lire = ire_ctable_lookup(ire->ire_addr, NULL, IRE_CACHE, 382145916cd2Sjpk NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); 38227c478bd9Sstevel@tonic-gate if (lire != NULL) { 38237c478bd9Sstevel@tonic-gate ire_refrele(lire); 38247c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire, IRE_FLUSH_ADD); 38257c478bd9Sstevel@tonic-gate } 38267c478bd9Sstevel@tonic-gate } else { 38277c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire, IRE_FLUSH_ADD); 38287c478bd9Sstevel@tonic-gate } 38297c478bd9Sstevel@tonic-gate } 38307c478bd9Sstevel@tonic-gate /* 38317c478bd9Sstevel@tonic-gate * We had to delay the fast path probe until the ire is inserted 38327c478bd9Sstevel@tonic-gate * in the list. Otherwise the fast path ack won't find the ire in 38337c478bd9Sstevel@tonic-gate * the table. 38347c478bd9Sstevel@tonic-gate */ 38357c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE || ire->ire_type == IRE_BROADCAST) 38367c478bd9Sstevel@tonic-gate ire_fastpath(ire); 38377c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) 38387c478bd9Sstevel@tonic-gate ASSERT(!MUTEX_HELD(&ire->ire_ipif->ipif_ill->ill_lock)); 38397c478bd9Sstevel@tonic-gate *ire_p = ire; 3840c793af95Ssangeeta if (need_refrele) { 3841c793af95Ssangeeta IRB_REFRELE(irb_ptr); 3842c793af95Ssangeeta } 38437c478bd9Sstevel@tonic-gate return (0); 38447c478bd9Sstevel@tonic-gate } 38457c478bd9Sstevel@tonic-gate 38467c478bd9Sstevel@tonic-gate /* 38477c478bd9Sstevel@tonic-gate * IRB_REFRELE is the only caller of the function. ire_unlink calls to 38487c478bd9Sstevel@tonic-gate * do the final cleanup for this ire. 38497c478bd9Sstevel@tonic-gate */ 38507c478bd9Sstevel@tonic-gate void 38517c478bd9Sstevel@tonic-gate ire_cleanup(ire_t *ire) 38527c478bd9Sstevel@tonic-gate { 38537c478bd9Sstevel@tonic-gate ire_t *ire_next; 38547c478bd9Sstevel@tonic-gate 38557c478bd9Sstevel@tonic-gate ASSERT(ire != NULL); 38567c478bd9Sstevel@tonic-gate 38577c478bd9Sstevel@tonic-gate while (ire != NULL) { 38587c478bd9Sstevel@tonic-gate ire_next = ire->ire_next; 38597c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 38607c478bd9Sstevel@tonic-gate ire_delete_v4(ire); 38617c478bd9Sstevel@tonic-gate BUMP_IRE_STATS(ire_stats_v4, ire_stats_deleted); 38627c478bd9Sstevel@tonic-gate } else { 38637c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV6_VERSION); 38647c478bd9Sstevel@tonic-gate ire_delete_v6(ire); 38657c478bd9Sstevel@tonic-gate BUMP_IRE_STATS(ire_stats_v6, ire_stats_deleted); 38667c478bd9Sstevel@tonic-gate } 38677c478bd9Sstevel@tonic-gate /* 38687c478bd9Sstevel@tonic-gate * Now it's really out of the list. Before doing the 38697c478bd9Sstevel@tonic-gate * REFRELE, set ire_next to NULL as ire_inactive asserts 38707c478bd9Sstevel@tonic-gate * so. 38717c478bd9Sstevel@tonic-gate */ 38727c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 38737c478bd9Sstevel@tonic-gate IRE_REFRELE_NOTR(ire); 38747c478bd9Sstevel@tonic-gate ire = ire_next; 38757c478bd9Sstevel@tonic-gate } 38767c478bd9Sstevel@tonic-gate } 38777c478bd9Sstevel@tonic-gate 38787c478bd9Sstevel@tonic-gate /* 38797c478bd9Sstevel@tonic-gate * IRB_REFRELE is the only caller of the function. It calls to unlink 38807c478bd9Sstevel@tonic-gate * all the CONDEMNED ires from this bucket. 38817c478bd9Sstevel@tonic-gate */ 38827c478bd9Sstevel@tonic-gate ire_t * 38837c478bd9Sstevel@tonic-gate ire_unlink(irb_t *irb) 38847c478bd9Sstevel@tonic-gate { 38857c478bd9Sstevel@tonic-gate ire_t *ire; 38867c478bd9Sstevel@tonic-gate ire_t *ire1; 38877c478bd9Sstevel@tonic-gate ire_t **ptpn; 38887c478bd9Sstevel@tonic-gate ire_t *ire_list = NULL; 38897c478bd9Sstevel@tonic-gate 38907c478bd9Sstevel@tonic-gate ASSERT(RW_WRITE_HELD(&irb->irb_lock)); 3891c793af95Ssangeeta ASSERT(((irb->irb_marks & IRB_MARK_FTABLE) && irb->irb_refcnt == 1) || 3892c793af95Ssangeeta (irb->irb_refcnt == 0)); 3893c793af95Ssangeeta ASSERT(irb->irb_marks & IRB_MARK_CONDEMNED); 38947c478bd9Sstevel@tonic-gate ASSERT(irb->irb_ire != NULL); 38957c478bd9Sstevel@tonic-gate 38967c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; ire = ire1) { 38977c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 38987c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_CONDEMNED) { 38997c478bd9Sstevel@tonic-gate ptpn = ire->ire_ptpn; 39007c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 39017c478bd9Sstevel@tonic-gate if (ire1) 39027c478bd9Sstevel@tonic-gate ire1->ire_ptpn = ptpn; 39037c478bd9Sstevel@tonic-gate *ptpn = ire1; 39047c478bd9Sstevel@tonic-gate ire->ire_ptpn = NULL; 39057c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 39067c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT) { 39077c478bd9Sstevel@tonic-gate /* 39087c478bd9Sstevel@tonic-gate * IRE is out of the list. We need to adjust 39097c478bd9Sstevel@tonic-gate * the accounting before the caller drops 39107c478bd9Sstevel@tonic-gate * the lock. 39117c478bd9Sstevel@tonic-gate */ 39127c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 39137c478bd9Sstevel@tonic-gate ASSERT(ipv6_ire_default_count != 0); 39147c478bd9Sstevel@tonic-gate ipv6_ire_default_count--; 39157c478bd9Sstevel@tonic-gate } 39167c478bd9Sstevel@tonic-gate } 39177c478bd9Sstevel@tonic-gate /* 39187c478bd9Sstevel@tonic-gate * We need to call ire_delete_v4 or ire_delete_v6 39197c478bd9Sstevel@tonic-gate * to clean up the cache or the redirects pointing at 39207c478bd9Sstevel@tonic-gate * the default gateway. We need to drop the lock 39217c478bd9Sstevel@tonic-gate * as ire_flush_cache/ire_delete_host_redircts require 39227c478bd9Sstevel@tonic-gate * so. But we can't drop the lock, as ire_unlink needs 39237c478bd9Sstevel@tonic-gate * to atomically remove the ires from the list. 39247c478bd9Sstevel@tonic-gate * So, create a temporary list of CONDEMNED ires 39257c478bd9Sstevel@tonic-gate * for doing ire_delete_v4/ire_delete_v6 operations 39267c478bd9Sstevel@tonic-gate * later on. 39277c478bd9Sstevel@tonic-gate */ 39287c478bd9Sstevel@tonic-gate ire->ire_next = ire_list; 39297c478bd9Sstevel@tonic-gate ire_list = ire; 39307c478bd9Sstevel@tonic-gate } 39317c478bd9Sstevel@tonic-gate } 3932c793af95Ssangeeta irb->irb_marks &= ~IRB_MARK_CONDEMNED; 39337c478bd9Sstevel@tonic-gate return (ire_list); 39347c478bd9Sstevel@tonic-gate } 39357c478bd9Sstevel@tonic-gate 39367c478bd9Sstevel@tonic-gate /* 39377c478bd9Sstevel@tonic-gate * Delete all the cache entries with this 'addr'. When IP gets a gratuitous 3938c793af95Ssangeeta * ARP message on any of its interface queue, it scans the nce table and 3939c793af95Ssangeeta * deletes and calls ndp_delete() for the appropriate nce. This action 3940c793af95Ssangeeta * also deletes all the neighbor/ire cache entries for that address. 3941c793af95Ssangeeta * This function is called from ip_arp_news in ip.c and also for 3942c793af95Ssangeeta * ARP ioctl processing in ip_if.c. ip_ire_clookup_and_delete returns 3943c793af95Ssangeeta * true if it finds a nce entry which is used by ip_arp_news to determine if 3944c793af95Ssangeeta * it needs to do an ire_walk_v4. The return value is also used for the 3945c793af95Ssangeeta * same purpose by ARP IOCTL processing * in ip_if.c when deleting 3946c793af95Ssangeeta * ARP entries. For SIOC*IFARP ioctls in addition to the address, 3947c793af95Ssangeeta * ip_if->ipif_ill also needs to be matched. 39487c478bd9Sstevel@tonic-gate */ 39497c478bd9Sstevel@tonic-gate boolean_t 39507c478bd9Sstevel@tonic-gate ip_ire_clookup_and_delete(ipaddr_t addr, ipif_t *ipif) 39517c478bd9Sstevel@tonic-gate { 39527c478bd9Sstevel@tonic-gate ill_t *ill; 3953c793af95Ssangeeta nce_t *nce; 39547c478bd9Sstevel@tonic-gate 3955c793af95Ssangeeta ill = (ipif ? ipif->ipif_ill : NULL); 39567c478bd9Sstevel@tonic-gate 3957c793af95Ssangeeta if (ill != NULL) { 3958c793af95Ssangeeta /* 3959c793af95Ssangeeta * clean up the nce (and any relevant ire's) that matches 3960c793af95Ssangeeta * on addr and ill. 3961c793af95Ssangeeta */ 3962c793af95Ssangeeta nce = ndp_lookup_v4(ill, &addr, B_FALSE); 3963c793af95Ssangeeta if (nce != NULL) { 3964c793af95Ssangeeta ndp_delete(nce); 3965c793af95Ssangeeta return (B_TRUE); 39667c478bd9Sstevel@tonic-gate } 3967c793af95Ssangeeta } else { 3968c793af95Ssangeeta /* 3969c793af95Ssangeeta * ill is wildcard. clean up all nce's and 3970c793af95Ssangeeta * ire's that match on addr 3971c793af95Ssangeeta */ 3972c793af95Ssangeeta nce_clookup_t cl; 39737c478bd9Sstevel@tonic-gate 3974c793af95Ssangeeta cl.ncecl_addr = addr; 3975c793af95Ssangeeta cl.ncecl_found = B_FALSE; 39767c478bd9Sstevel@tonic-gate 3977c793af95Ssangeeta ndp_walk_common(&ndp4, NULL, 3978c793af95Ssangeeta (pfi_t)ip_nce_clookup_and_delete, (uchar_t *)&cl, B_TRUE); 3979c793af95Ssangeeta 3980c793af95Ssangeeta /* 3981c793af95Ssangeeta * ncecl_found would be set by ip_nce_clookup_and_delete if 3982c793af95Ssangeeta * we found a matching nce. 3983c793af95Ssangeeta */ 3984c793af95Ssangeeta return (cl.ncecl_found); 3985c793af95Ssangeeta } 3986c793af95Ssangeeta return (B_FALSE); 3987c793af95Ssangeeta 3988c793af95Ssangeeta } 3989c793af95Ssangeeta 3990c793af95Ssangeeta /* Delete the supplied nce if its nce_addr matches the supplied address */ 3991c793af95Ssangeeta static void 3992c793af95Ssangeeta ip_nce_clookup_and_delete(nce_t *nce, void *arg) 3993c793af95Ssangeeta { 3994c793af95Ssangeeta nce_clookup_t *cl = (nce_clookup_t *)arg; 3995c793af95Ssangeeta ipaddr_t nce_addr; 3996c793af95Ssangeeta 3997c793af95Ssangeeta IN6_V4MAPPED_TO_IPADDR(&nce->nce_addr, nce_addr); 3998c793af95Ssangeeta if (nce_addr == cl->ncecl_addr) { 3999c793af95Ssangeeta cl->ncecl_found = B_TRUE; 4000c793af95Ssangeeta /* clean up the nce (and any relevant ire's) */ 4001c793af95Ssangeeta ndp_delete(nce); 4002c793af95Ssangeeta } 4003c793af95Ssangeeta } 4004c793af95Ssangeeta 4005c793af95Ssangeeta /* 4006c793af95Ssangeeta * Clean up the radix node for this ire. Must be called by IRB_REFRELE 4007c793af95Ssangeeta * when there are no ire's left in the bucket. Returns TRUE if the bucket 4008c793af95Ssangeeta * is deleted and freed. 4009c793af95Ssangeeta */ 4010c793af95Ssangeeta boolean_t 4011c793af95Ssangeeta irb_inactive(irb_t *irb) 4012c793af95Ssangeeta { 4013c793af95Ssangeeta struct rt_entry *rt; 4014c793af95Ssangeeta struct radix_node *rn; 4015c793af95Ssangeeta 4016c793af95Ssangeeta rt = IRB2RT(irb); 4017c793af95Ssangeeta rn = (struct radix_node *)rt; 4018c793af95Ssangeeta 4019c793af95Ssangeeta /* first remove it from the radix tree. */ 4020c793af95Ssangeeta RADIX_NODE_HEAD_WLOCK(ip_ftable); 4021c793af95Ssangeeta rw_enter(&irb->irb_lock, RW_WRITER); 4022c793af95Ssangeeta if (irb->irb_refcnt == 1 && irb->irb_nire == 0) { 4023c793af95Ssangeeta rn = ip_ftable->rnh_deladdr(rn->rn_key, rn->rn_mask, 4024c793af95Ssangeeta ip_ftable); 4025c793af95Ssangeeta DTRACE_PROBE1(irb__free, rt_t *, rt); 4026c793af95Ssangeeta ASSERT((void *)rn == (void *)rt); 4027c793af95Ssangeeta Free(rt, rt_entry_cache); 4028c793af95Ssangeeta /* irb_lock is freed */ 4029c793af95Ssangeeta RADIX_NODE_HEAD_UNLOCK(ip_ftable); 4030c793af95Ssangeeta return (B_TRUE); 4031c793af95Ssangeeta } 4032c793af95Ssangeeta rw_exit(&irb->irb_lock); 4033c793af95Ssangeeta RADIX_NODE_HEAD_UNLOCK(ip_ftable); 4034c793af95Ssangeeta return (B_FALSE); 40357c478bd9Sstevel@tonic-gate } 40367c478bd9Sstevel@tonic-gate 40377c478bd9Sstevel@tonic-gate /* 40387c478bd9Sstevel@tonic-gate * Delete the specified IRE. 40397c478bd9Sstevel@tonic-gate */ 40407c478bd9Sstevel@tonic-gate void 40417c478bd9Sstevel@tonic-gate ire_delete(ire_t *ire) 40427c478bd9Sstevel@tonic-gate { 40437c478bd9Sstevel@tonic-gate ire_t *ire1; 40447c478bd9Sstevel@tonic-gate ire_t **ptpn; 40457c478bd9Sstevel@tonic-gate irb_t *irb; 40467c478bd9Sstevel@tonic-gate 4047c793af95Ssangeeta if ((irb = ire->ire_bucket) == NULL) { 40487c478bd9Sstevel@tonic-gate /* 40497c478bd9Sstevel@tonic-gate * It was never inserted in the list. Should call REFRELE 40507c478bd9Sstevel@tonic-gate * to free this IRE. 40517c478bd9Sstevel@tonic-gate */ 40527c478bd9Sstevel@tonic-gate IRE_REFRELE_NOTR(ire); 40537c478bd9Sstevel@tonic-gate return; 40547c478bd9Sstevel@tonic-gate } 40557c478bd9Sstevel@tonic-gate 40567c478bd9Sstevel@tonic-gate rw_enter(&irb->irb_lock, RW_WRITER); 40577c478bd9Sstevel@tonic-gate 4058c793af95Ssangeeta if (irb->irb_rr_origin == ire) { 4059c793af95Ssangeeta irb->irb_rr_origin = NULL; 4060c793af95Ssangeeta } 4061c793af95Ssangeeta 40627c478bd9Sstevel@tonic-gate /* 40637c478bd9Sstevel@tonic-gate * In case of V4 we might still be waiting for fastpath ack. 40647c478bd9Sstevel@tonic-gate */ 4065c793af95Ssangeeta if (ire->ire_ipversion == IPV4_VERSION && ire->ire_stq != NULL) { 40667c478bd9Sstevel@tonic-gate ill_t *ill; 40677c478bd9Sstevel@tonic-gate 40687c478bd9Sstevel@tonic-gate ill = ire_to_ill(ire); 40697c478bd9Sstevel@tonic-gate if (ill != NULL) 40707c478bd9Sstevel@tonic-gate ire_fastpath_list_delete(ill, ire); 40717c478bd9Sstevel@tonic-gate } 40727c478bd9Sstevel@tonic-gate 40737c478bd9Sstevel@tonic-gate if (ire->ire_ptpn == NULL) { 40747c478bd9Sstevel@tonic-gate /* 40757c478bd9Sstevel@tonic-gate * Some other thread has removed us from the list. 40767c478bd9Sstevel@tonic-gate * It should have done the REFRELE for us. 40777c478bd9Sstevel@tonic-gate */ 40787c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 40797c478bd9Sstevel@tonic-gate return; 40807c478bd9Sstevel@tonic-gate } 40817c478bd9Sstevel@tonic-gate 40827c478bd9Sstevel@tonic-gate if (irb->irb_refcnt != 0) { 40837c478bd9Sstevel@tonic-gate /* 40847c478bd9Sstevel@tonic-gate * The last thread to leave this bucket will 40857c478bd9Sstevel@tonic-gate * delete this ire. 40867c478bd9Sstevel@tonic-gate */ 40877c478bd9Sstevel@tonic-gate if (!(ire->ire_marks & IRE_MARK_CONDEMNED)) { 40887c478bd9Sstevel@tonic-gate irb->irb_ire_cnt--; 40897c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_TEMPORARY) 40907c478bd9Sstevel@tonic-gate irb->irb_tmp_ire_cnt--; 40917c478bd9Sstevel@tonic-gate ire->ire_marks |= IRE_MARK_CONDEMNED; 40927c478bd9Sstevel@tonic-gate } 4093c793af95Ssangeeta irb->irb_marks |= IRB_MARK_CONDEMNED; 40947c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 40957c478bd9Sstevel@tonic-gate return; 40967c478bd9Sstevel@tonic-gate } 40977c478bd9Sstevel@tonic-gate 40987c478bd9Sstevel@tonic-gate /* 40997c478bd9Sstevel@tonic-gate * Normally to delete an ire, we walk the bucket. While we 41007c478bd9Sstevel@tonic-gate * walk the bucket, we normally bump up irb_refcnt and hence 41017c478bd9Sstevel@tonic-gate * we return from above where we mark CONDEMNED and the ire 41027c478bd9Sstevel@tonic-gate * gets deleted from ire_unlink. This case is where somebody 41037c478bd9Sstevel@tonic-gate * knows the ire e.g by doing a lookup, and wants to delete the 41047c478bd9Sstevel@tonic-gate * IRE. irb_refcnt would be 0 in this case if nobody is walking 41057c478bd9Sstevel@tonic-gate * the bucket. 41067c478bd9Sstevel@tonic-gate */ 41077c478bd9Sstevel@tonic-gate ptpn = ire->ire_ptpn; 41087c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 41097c478bd9Sstevel@tonic-gate if (ire1 != NULL) 41107c478bd9Sstevel@tonic-gate ire1->ire_ptpn = ptpn; 41117c478bd9Sstevel@tonic-gate ASSERT(ptpn != NULL); 41127c478bd9Sstevel@tonic-gate *ptpn = ire1; 41137c478bd9Sstevel@tonic-gate ire->ire_ptpn = NULL; 41147c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 41157c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 41167c478bd9Sstevel@tonic-gate BUMP_IRE_STATS(ire_stats_v6, ire_stats_deleted); 41177c478bd9Sstevel@tonic-gate } else { 41187c478bd9Sstevel@tonic-gate BUMP_IRE_STATS(ire_stats_v4, ire_stats_deleted); 41197c478bd9Sstevel@tonic-gate } 41207c478bd9Sstevel@tonic-gate /* 41217c478bd9Sstevel@tonic-gate * ip_wput/ip_wput_v6 checks this flag to see whether 41227c478bd9Sstevel@tonic-gate * it should still use the cached ire or not. 41237c478bd9Sstevel@tonic-gate */ 41247c478bd9Sstevel@tonic-gate ire->ire_marks |= IRE_MARK_CONDEMNED; 41257c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT) { 41267c478bd9Sstevel@tonic-gate /* 41277c478bd9Sstevel@tonic-gate * IRE is out of the list. We need to adjust the 41287c478bd9Sstevel@tonic-gate * accounting before we drop the lock. 41297c478bd9Sstevel@tonic-gate */ 41307c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 41317c478bd9Sstevel@tonic-gate ASSERT(ipv6_ire_default_count != 0); 41327c478bd9Sstevel@tonic-gate ipv6_ire_default_count--; 41337c478bd9Sstevel@tonic-gate } 41347c478bd9Sstevel@tonic-gate } 41357c478bd9Sstevel@tonic-gate irb->irb_ire_cnt--; 4136c793af95Ssangeeta 41377c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_TEMPORARY) 41387c478bd9Sstevel@tonic-gate irb->irb_tmp_ire_cnt--; 41397c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 41407c478bd9Sstevel@tonic-gate 41417c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 41427c478bd9Sstevel@tonic-gate ire_delete_v6(ire); 41437c478bd9Sstevel@tonic-gate } else { 41447c478bd9Sstevel@tonic-gate ire_delete_v4(ire); 41457c478bd9Sstevel@tonic-gate } 41467c478bd9Sstevel@tonic-gate /* 41477c478bd9Sstevel@tonic-gate * We removed it from the list. Decrement the 41487c478bd9Sstevel@tonic-gate * reference count. 41497c478bd9Sstevel@tonic-gate */ 41507c478bd9Sstevel@tonic-gate IRE_REFRELE_NOTR(ire); 41517c478bd9Sstevel@tonic-gate } 41527c478bd9Sstevel@tonic-gate 41537c478bd9Sstevel@tonic-gate /* 41547c478bd9Sstevel@tonic-gate * Delete the specified IRE. 41557c478bd9Sstevel@tonic-gate * All calls should use ire_delete(). 41567c478bd9Sstevel@tonic-gate * Sometimes called as writer though not required by this function. 41577c478bd9Sstevel@tonic-gate * 41587c478bd9Sstevel@tonic-gate * NOTE : This function is called only if the ire was added 41597c478bd9Sstevel@tonic-gate * in the list. 41607c478bd9Sstevel@tonic-gate */ 41617c478bd9Sstevel@tonic-gate static void 41627c478bd9Sstevel@tonic-gate ire_delete_v4(ire_t *ire) 41637c478bd9Sstevel@tonic-gate { 41647c478bd9Sstevel@tonic-gate ASSERT(ire->ire_refcnt >= 1); 41657c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 41667c478bd9Sstevel@tonic-gate 41677c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) 41687c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire, IRE_FLUSH_DELETE); 41697c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT) { 41707c478bd9Sstevel@tonic-gate /* 41717c478bd9Sstevel@tonic-gate * when a default gateway is going away 41727c478bd9Sstevel@tonic-gate * delete all the host redirects pointing at that 41737c478bd9Sstevel@tonic-gate * gateway. 41747c478bd9Sstevel@tonic-gate */ 41757c478bd9Sstevel@tonic-gate ire_delete_host_redirects(ire->ire_gateway_addr); 41767c478bd9Sstevel@tonic-gate } 41777c478bd9Sstevel@tonic-gate } 41787c478bd9Sstevel@tonic-gate 41797c478bd9Sstevel@tonic-gate /* 41807c478bd9Sstevel@tonic-gate * IRE_REFRELE/ire_refrele are the only caller of the function. It calls 41817c478bd9Sstevel@tonic-gate * to free the ire when the reference count goes to zero. 41827c478bd9Sstevel@tonic-gate */ 41837c478bd9Sstevel@tonic-gate void 41847c478bd9Sstevel@tonic-gate ire_inactive(ire_t *ire) 41857c478bd9Sstevel@tonic-gate { 41867c478bd9Sstevel@tonic-gate nce_t *nce; 41877c478bd9Sstevel@tonic-gate ill_t *ill = NULL; 41887c478bd9Sstevel@tonic-gate ill_t *stq_ill = NULL; 41897c478bd9Sstevel@tonic-gate ill_t *in_ill = NULL; 41907c478bd9Sstevel@tonic-gate ipif_t *ipif; 41917c478bd9Sstevel@tonic-gate boolean_t need_wakeup = B_FALSE; 4192c793af95Ssangeeta irb_t *irb; 41937c478bd9Sstevel@tonic-gate 41947c478bd9Sstevel@tonic-gate ASSERT(ire->ire_refcnt == 0); 41957c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ptpn == NULL); 41967c478bd9Sstevel@tonic-gate ASSERT(ire->ire_next == NULL); 41977c478bd9Sstevel@tonic-gate 4198c793af95Ssangeeta if (ire->ire_gw_secattr != NULL) { 4199c793af95Ssangeeta ire_gw_secattr_free(ire->ire_gw_secattr); 4200c793af95Ssangeeta ire->ire_gw_secattr = NULL; 4201c793af95Ssangeeta } 4202c793af95Ssangeeta 4203c793af95Ssangeeta if (ire->ire_mp != NULL) { 4204c793af95Ssangeeta ASSERT(ire->ire_fastpath == NULL); 4205c793af95Ssangeeta ASSERT(ire->ire_bucket == NULL); 4206c793af95Ssangeeta mutex_destroy(&ire->ire_lock); 4207c793af95Ssangeeta BUMP_IRE_STATS(ire_stats_v4, ire_stats_freed); 4208c793af95Ssangeeta if (ire->ire_nce != NULL) 4209c793af95Ssangeeta NCE_REFRELE_NOTR(ire->ire_nce); 4210c793af95Ssangeeta freeb(ire->ire_mp); 4211c793af95Ssangeeta return; 4212c793af95Ssangeeta } 4213c793af95Ssangeeta 42147c478bd9Sstevel@tonic-gate if ((nce = ire->ire_nce) != NULL) { 42157c478bd9Sstevel@tonic-gate NCE_REFRELE_NOTR(nce); 42167c478bd9Sstevel@tonic-gate ire->ire_nce = NULL; 42177c478bd9Sstevel@tonic-gate } 4218c793af95Ssangeeta 42197c478bd9Sstevel@tonic-gate if (ire->ire_ipif == NULL) 42207c478bd9Sstevel@tonic-gate goto end; 42217c478bd9Sstevel@tonic-gate 42227c478bd9Sstevel@tonic-gate ipif = ire->ire_ipif; 42237c478bd9Sstevel@tonic-gate ill = ipif->ipif_ill; 42247c478bd9Sstevel@tonic-gate 42257c478bd9Sstevel@tonic-gate if (ire->ire_bucket == NULL) { 42267c478bd9Sstevel@tonic-gate /* The ire was never inserted in the table. */ 42277c478bd9Sstevel@tonic-gate goto end; 42287c478bd9Sstevel@tonic-gate } 42297c478bd9Sstevel@tonic-gate 42307c478bd9Sstevel@tonic-gate /* 42317c478bd9Sstevel@tonic-gate * ipif_ire_cnt on this ipif goes down by 1. If the ire_stq is 42327c478bd9Sstevel@tonic-gate * non-null ill_ire_count also goes down by 1. If the in_ill is 42337c478bd9Sstevel@tonic-gate * non-null either ill_mrtun_refcnt or ill_srcif_refcnt goes down by 1. 42347c478bd9Sstevel@tonic-gate * 42357c478bd9Sstevel@tonic-gate * The ipif that is associated with an ire is ire->ire_ipif and 42367c478bd9Sstevel@tonic-gate * hence when the ire->ire_ipif->ipif_ire_cnt drops to zero we call 42377c478bd9Sstevel@tonic-gate * ipif_ill_refrele_tail. Usually stq_ill is null or the same as 42387c478bd9Sstevel@tonic-gate * ire->ire_ipif->ipif_ill. So nothing more needs to be done. Only 42397c478bd9Sstevel@tonic-gate * in the case of IRE_CACHES when IPMP is used, stq_ill can be 42407c478bd9Sstevel@tonic-gate * different. If this is different from ire->ire_ipif->ipif_ill and 42417c478bd9Sstevel@tonic-gate * if the ill_ire_cnt on the stq_ill also has dropped to zero, we call 42427c478bd9Sstevel@tonic-gate * ipif_ill_refrele_tail on the stq_ill. If mobile ip is in use 42437c478bd9Sstevel@tonic-gate * in_ill could be non-null. If it is a reverse tunnel related ire 42447c478bd9Sstevel@tonic-gate * ill_mrtun_refcnt is non-zero. If it is forward tunnel related ire 42457c478bd9Sstevel@tonic-gate * ill_srcif_refcnt is non-null. 42467c478bd9Sstevel@tonic-gate */ 42477c478bd9Sstevel@tonic-gate 42487c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) 42497c478bd9Sstevel@tonic-gate stq_ill = (ill_t *)ire->ire_stq->q_ptr; 42507c478bd9Sstevel@tonic-gate if (ire->ire_in_ill != NULL) 42517c478bd9Sstevel@tonic-gate in_ill = ire->ire_in_ill; 42527c478bd9Sstevel@tonic-gate 42537c478bd9Sstevel@tonic-gate if ((stq_ill == NULL || stq_ill == ill) && (in_ill == NULL)) { 42547c478bd9Sstevel@tonic-gate /* Optimize the most common case */ 42557c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 42567c478bd9Sstevel@tonic-gate ASSERT(ipif->ipif_ire_cnt != 0); 42577c478bd9Sstevel@tonic-gate ipif->ipif_ire_cnt--; 42587c478bd9Sstevel@tonic-gate if (ipif->ipif_ire_cnt == 0) 42597c478bd9Sstevel@tonic-gate need_wakeup = B_TRUE; 42607c478bd9Sstevel@tonic-gate if (stq_ill != NULL) { 42617c478bd9Sstevel@tonic-gate ASSERT(stq_ill->ill_ire_cnt != 0); 42627c478bd9Sstevel@tonic-gate stq_ill->ill_ire_cnt--; 42637c478bd9Sstevel@tonic-gate if (stq_ill->ill_ire_cnt == 0) 42647c478bd9Sstevel@tonic-gate need_wakeup = B_TRUE; 42657c478bd9Sstevel@tonic-gate } 42667c478bd9Sstevel@tonic-gate if (need_wakeup) { 42677c478bd9Sstevel@tonic-gate /* Drops the ill lock */ 42687c478bd9Sstevel@tonic-gate ipif_ill_refrele_tail(ill); 42697c478bd9Sstevel@tonic-gate } else { 42707c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 42717c478bd9Sstevel@tonic-gate } 42727c478bd9Sstevel@tonic-gate } else { 42737c478bd9Sstevel@tonic-gate /* 42747c478bd9Sstevel@tonic-gate * We can't grab all the ill locks at the same time. 42757c478bd9Sstevel@tonic-gate * It can lead to recursive lock enter in the call to 42767c478bd9Sstevel@tonic-gate * ipif_ill_refrele_tail and later. Instead do it 1 at 42777c478bd9Sstevel@tonic-gate * a time. 42787c478bd9Sstevel@tonic-gate */ 42797c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 42807c478bd9Sstevel@tonic-gate ASSERT(ipif->ipif_ire_cnt != 0); 42817c478bd9Sstevel@tonic-gate ipif->ipif_ire_cnt--; 42827c478bd9Sstevel@tonic-gate if (ipif->ipif_ire_cnt == 0) { 42837c478bd9Sstevel@tonic-gate /* Drops the lock */ 42847c478bd9Sstevel@tonic-gate ipif_ill_refrele_tail(ill); 42857c478bd9Sstevel@tonic-gate } else { 42867c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 42877c478bd9Sstevel@tonic-gate } 42887c478bd9Sstevel@tonic-gate if (stq_ill != NULL) { 42897c478bd9Sstevel@tonic-gate mutex_enter(&stq_ill->ill_lock); 42907c478bd9Sstevel@tonic-gate ASSERT(stq_ill->ill_ire_cnt != 0); 42917c478bd9Sstevel@tonic-gate stq_ill->ill_ire_cnt--; 42927c478bd9Sstevel@tonic-gate if (stq_ill->ill_ire_cnt == 0) { 42937c478bd9Sstevel@tonic-gate /* Drops the ill lock */ 42947c478bd9Sstevel@tonic-gate ipif_ill_refrele_tail(stq_ill); 42957c478bd9Sstevel@tonic-gate } else { 42967c478bd9Sstevel@tonic-gate mutex_exit(&stq_ill->ill_lock); 42977c478bd9Sstevel@tonic-gate } 42987c478bd9Sstevel@tonic-gate } 42997c478bd9Sstevel@tonic-gate if (in_ill != NULL) { 43007c478bd9Sstevel@tonic-gate mutex_enter(&in_ill->ill_lock); 43017c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_MIPRTUN) { 43027c478bd9Sstevel@tonic-gate /* 43037c478bd9Sstevel@tonic-gate * Mobile IP reverse tunnel ire. 43047c478bd9Sstevel@tonic-gate * Decrement table count and the 43057c478bd9Sstevel@tonic-gate * ill reference count. This signifies 43067c478bd9Sstevel@tonic-gate * mipagent is deleting reverse tunnel 43077c478bd9Sstevel@tonic-gate * route for a particular mobile node. 43087c478bd9Sstevel@tonic-gate */ 43097c478bd9Sstevel@tonic-gate mutex_enter(&ire_mrtun_lock); 43107c478bd9Sstevel@tonic-gate ire_mrtun_count--; 43117c478bd9Sstevel@tonic-gate mutex_exit(&ire_mrtun_lock); 43127c478bd9Sstevel@tonic-gate ASSERT(in_ill->ill_mrtun_refcnt != 0); 43137c478bd9Sstevel@tonic-gate in_ill->ill_mrtun_refcnt--; 43147c478bd9Sstevel@tonic-gate if (in_ill->ill_mrtun_refcnt == 0) { 43157c478bd9Sstevel@tonic-gate /* Drops the ill lock */ 43167c478bd9Sstevel@tonic-gate ipif_ill_refrele_tail(in_ill); 43177c478bd9Sstevel@tonic-gate } else { 43187c478bd9Sstevel@tonic-gate mutex_exit(&in_ill->ill_lock); 43197c478bd9Sstevel@tonic-gate } 43207c478bd9Sstevel@tonic-gate } else { 43217c478bd9Sstevel@tonic-gate mutex_enter(&ire_srcif_table_lock); 43227c478bd9Sstevel@tonic-gate ire_srcif_table_count--; 43237c478bd9Sstevel@tonic-gate mutex_exit(&ire_srcif_table_lock); 43247c478bd9Sstevel@tonic-gate ASSERT(in_ill->ill_srcif_refcnt != 0); 43257c478bd9Sstevel@tonic-gate in_ill->ill_srcif_refcnt--; 43267c478bd9Sstevel@tonic-gate if (in_ill->ill_srcif_refcnt == 0) { 43277c478bd9Sstevel@tonic-gate /* Drops the ill lock */ 43287c478bd9Sstevel@tonic-gate ipif_ill_refrele_tail(in_ill); 43297c478bd9Sstevel@tonic-gate } else { 43307c478bd9Sstevel@tonic-gate mutex_exit(&in_ill->ill_lock); 43317c478bd9Sstevel@tonic-gate } 43327c478bd9Sstevel@tonic-gate } 43337c478bd9Sstevel@tonic-gate } 43347c478bd9Sstevel@tonic-gate } 43357c478bd9Sstevel@tonic-gate end: 43367c478bd9Sstevel@tonic-gate /* This should be true for both V4 and V6 */ 43377c478bd9Sstevel@tonic-gate ASSERT(ire->ire_fastpath == NULL); 43387c478bd9Sstevel@tonic-gate 4339c793af95Ssangeeta if ((ire->ire_type & IRE_FORWARDTABLE) && 4340c793af95Ssangeeta (ire->ire_ipversion == IPV4_VERSION) && 4341c793af95Ssangeeta ((irb = ire->ire_bucket) != NULL)) { 4342c793af95Ssangeeta rw_enter(&irb->irb_lock, RW_WRITER); 4343c793af95Ssangeeta irb->irb_nire--; 4344c793af95Ssangeeta /* 4345c793af95Ssangeeta * Instead of examining the conditions for freeing 4346c793af95Ssangeeta * the radix node here, we do it by calling 4347c793af95Ssangeeta * IRB_REFRELE which is a single point in the code 4348c793af95Ssangeeta * that embeds that logic. Bump up the refcnt to 4349c793af95Ssangeeta * be able to call IRB_REFRELE 4350c793af95Ssangeeta */ 4351c793af95Ssangeeta IRB_REFHOLD_LOCKED(irb); 4352c793af95Ssangeeta rw_exit(&irb->irb_lock); 4353c793af95Ssangeeta IRB_REFRELE(irb); 4354c793af95Ssangeeta } 43557c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 43567c478bd9Sstevel@tonic-gate 43577c478bd9Sstevel@tonic-gate if (ire->ire_in_ill != NULL) { 43587c478bd9Sstevel@tonic-gate ire->ire_in_ill = NULL; 43597c478bd9Sstevel@tonic-gate } 43607c478bd9Sstevel@tonic-gate 43617c478bd9Sstevel@tonic-gate #ifdef IRE_DEBUG 43627c478bd9Sstevel@tonic-gate ire_trace_inactive(ire); 43637c478bd9Sstevel@tonic-gate #endif 43647c478bd9Sstevel@tonic-gate mutex_destroy(&ire->ire_lock); 43657c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 43667c478bd9Sstevel@tonic-gate BUMP_IRE_STATS(ire_stats_v6, ire_stats_freed); 43677c478bd9Sstevel@tonic-gate } else { 43687c478bd9Sstevel@tonic-gate BUMP_IRE_STATS(ire_stats_v4, ire_stats_freed); 43697c478bd9Sstevel@tonic-gate } 4370c793af95Ssangeeta ASSERT(ire->ire_mp == NULL); 43717c478bd9Sstevel@tonic-gate /* Has been allocated out of the cache */ 43727c478bd9Sstevel@tonic-gate kmem_cache_free(ire_cache, ire); 43737c478bd9Sstevel@tonic-gate } 43747c478bd9Sstevel@tonic-gate 43757c478bd9Sstevel@tonic-gate /* 43767c478bd9Sstevel@tonic-gate * ire_walk routine to delete all IRE_CACHE/IRE_HOST_REDIRECT entries 43777c478bd9Sstevel@tonic-gate * that have a given gateway address. 43787c478bd9Sstevel@tonic-gate */ 43797c478bd9Sstevel@tonic-gate void 43807c478bd9Sstevel@tonic-gate ire_delete_cache_gw(ire_t *ire, char *cp) 43817c478bd9Sstevel@tonic-gate { 43827c478bd9Sstevel@tonic-gate ipaddr_t gw_addr; 43837c478bd9Sstevel@tonic-gate 43847c478bd9Sstevel@tonic-gate if (!(ire->ire_type & (IRE_CACHE|IRE_HOST_REDIRECT))) 43857c478bd9Sstevel@tonic-gate return; 43867c478bd9Sstevel@tonic-gate 43877c478bd9Sstevel@tonic-gate bcopy(cp, &gw_addr, sizeof (gw_addr)); 43887c478bd9Sstevel@tonic-gate if (ire->ire_gateway_addr == gw_addr) { 43897c478bd9Sstevel@tonic-gate ip1dbg(("ire_delete_cache_gw: deleted 0x%x type %d to 0x%x\n", 43907c478bd9Sstevel@tonic-gate (int)ntohl(ire->ire_addr), ire->ire_type, 43917c478bd9Sstevel@tonic-gate (int)ntohl(ire->ire_gateway_addr))); 43927c478bd9Sstevel@tonic-gate ire_delete(ire); 43937c478bd9Sstevel@tonic-gate } 43947c478bd9Sstevel@tonic-gate } 43957c478bd9Sstevel@tonic-gate 43967c478bd9Sstevel@tonic-gate /* 43977c478bd9Sstevel@tonic-gate * Remove all IRE_CACHE entries that match the ire specified. 43987c478bd9Sstevel@tonic-gate * 43997c478bd9Sstevel@tonic-gate * The flag argument indicates if the flush request is due to addition 44007c478bd9Sstevel@tonic-gate * of new route (IRE_FLUSH_ADD) or deletion of old route (IRE_FLUSH_DELETE). 44017c478bd9Sstevel@tonic-gate * 44027c478bd9Sstevel@tonic-gate * This routine takes only the IREs from the forwarding table and flushes 44037c478bd9Sstevel@tonic-gate * the corresponding entries from the cache table. 44047c478bd9Sstevel@tonic-gate * 44057c478bd9Sstevel@tonic-gate * When flushing due to the deletion of an old route, it 44067c478bd9Sstevel@tonic-gate * just checks the cache handles (ire_phandle and ire_ihandle) and 44077c478bd9Sstevel@tonic-gate * deletes the ones that match. 44087c478bd9Sstevel@tonic-gate * 44097c478bd9Sstevel@tonic-gate * When flushing due to the creation of a new route, it checks 44107c478bd9Sstevel@tonic-gate * if a cache entry's address matches the one in the IRE and 44117c478bd9Sstevel@tonic-gate * that the cache entry's parent has a less specific mask than the 44127c478bd9Sstevel@tonic-gate * one in IRE. The destination of such a cache entry could be the 44137c478bd9Sstevel@tonic-gate * gateway for other cache entries, so we need to flush those as 44147c478bd9Sstevel@tonic-gate * well by looking for gateway addresses matching the IRE's address. 44157c478bd9Sstevel@tonic-gate */ 44167c478bd9Sstevel@tonic-gate void 44177c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire_t *ire, int flag) 44187c478bd9Sstevel@tonic-gate { 44197c478bd9Sstevel@tonic-gate int i; 44207c478bd9Sstevel@tonic-gate ire_t *cire; 44217c478bd9Sstevel@tonic-gate irb_t *irb; 44227c478bd9Sstevel@tonic-gate 44237c478bd9Sstevel@tonic-gate if (ire->ire_type & IRE_CACHE) 44247c478bd9Sstevel@tonic-gate return; 44257c478bd9Sstevel@tonic-gate 44267c478bd9Sstevel@tonic-gate /* 44277c478bd9Sstevel@tonic-gate * If a default is just created, there is no point 44287c478bd9Sstevel@tonic-gate * in going through the cache, as there will not be any 44297c478bd9Sstevel@tonic-gate * cached ires. 44307c478bd9Sstevel@tonic-gate */ 44317c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT && flag == IRE_FLUSH_ADD) 44327c478bd9Sstevel@tonic-gate return; 44337c478bd9Sstevel@tonic-gate if (flag == IRE_FLUSH_ADD) { 44347c478bd9Sstevel@tonic-gate /* 44357c478bd9Sstevel@tonic-gate * This selective flush is due to the addition of 44367c478bd9Sstevel@tonic-gate * new IRE. 44377c478bd9Sstevel@tonic-gate */ 44387c478bd9Sstevel@tonic-gate for (i = 0; i < ip_cache_table_size; i++) { 44397c478bd9Sstevel@tonic-gate irb = &ip_cache_table[i]; 44407c478bd9Sstevel@tonic-gate if ((cire = irb->irb_ire) == NULL) 44417c478bd9Sstevel@tonic-gate continue; 44427c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 44437c478bd9Sstevel@tonic-gate for (cire = irb->irb_ire; cire != NULL; 44447c478bd9Sstevel@tonic-gate cire = cire->ire_next) { 44457c478bd9Sstevel@tonic-gate if (cire->ire_type != IRE_CACHE) 44467c478bd9Sstevel@tonic-gate continue; 44477c478bd9Sstevel@tonic-gate /* 44487c478bd9Sstevel@tonic-gate * If 'cire' belongs to the same subnet 44497c478bd9Sstevel@tonic-gate * as the new ire being added, and 'cire' 44507c478bd9Sstevel@tonic-gate * is derived from a prefix that is less 44517c478bd9Sstevel@tonic-gate * specific than the new ire being added, 44527c478bd9Sstevel@tonic-gate * we need to flush 'cire'; for instance, 44537c478bd9Sstevel@tonic-gate * when a new interface comes up. 44547c478bd9Sstevel@tonic-gate */ 44557c478bd9Sstevel@tonic-gate if (((cire->ire_addr & ire->ire_mask) == 44567c478bd9Sstevel@tonic-gate (ire->ire_addr & ire->ire_mask)) && 44577c478bd9Sstevel@tonic-gate (ip_mask_to_plen(cire->ire_cmask) <= 44587c478bd9Sstevel@tonic-gate ire->ire_masklen)) { 44597c478bd9Sstevel@tonic-gate ire_delete(cire); 44607c478bd9Sstevel@tonic-gate continue; 44617c478bd9Sstevel@tonic-gate } 44627c478bd9Sstevel@tonic-gate /* 44637c478bd9Sstevel@tonic-gate * This is the case when the ire_gateway_addr 44647c478bd9Sstevel@tonic-gate * of 'cire' belongs to the same subnet as 44657c478bd9Sstevel@tonic-gate * the new ire being added. 44667c478bd9Sstevel@tonic-gate * Flushing such ires is sometimes required to 44677c478bd9Sstevel@tonic-gate * avoid misrouting: say we have a machine with 44687c478bd9Sstevel@tonic-gate * two interfaces (I1 and I2), a default router 44697c478bd9Sstevel@tonic-gate * R on the I1 subnet, and a host route to an 44707c478bd9Sstevel@tonic-gate * off-link destination D with a gateway G on 44717c478bd9Sstevel@tonic-gate * the I2 subnet. 44727c478bd9Sstevel@tonic-gate * Under normal operation, we will have an 44737c478bd9Sstevel@tonic-gate * on-link cache entry for G and an off-link 44747c478bd9Sstevel@tonic-gate * cache entry for D with G as ire_gateway_addr, 44757c478bd9Sstevel@tonic-gate * traffic to D will reach its destination 44767c478bd9Sstevel@tonic-gate * through gateway G. 44777c478bd9Sstevel@tonic-gate * If the administrator does 'ifconfig I2 down', 44787c478bd9Sstevel@tonic-gate * the cache entries for D and G will be 44797c478bd9Sstevel@tonic-gate * flushed. However, G will now be resolved as 44807c478bd9Sstevel@tonic-gate * an off-link destination using R (the default 44817c478bd9Sstevel@tonic-gate * router) as gateway. Then D will also be 44827c478bd9Sstevel@tonic-gate * resolved as an off-link destination using G 44837c478bd9Sstevel@tonic-gate * as gateway - this behavior is due to 44847c478bd9Sstevel@tonic-gate * compatibility reasons, see comment in 44857c478bd9Sstevel@tonic-gate * ire_ihandle_lookup_offlink(). Traffic to D 44867c478bd9Sstevel@tonic-gate * will go to the router R and probably won't 44877c478bd9Sstevel@tonic-gate * reach the destination. 44887c478bd9Sstevel@tonic-gate * The administrator then does 'ifconfig I2 up'. 44897c478bd9Sstevel@tonic-gate * Since G is on the I2 subnet, this routine 44907c478bd9Sstevel@tonic-gate * will flush its cache entry. It must also 44917c478bd9Sstevel@tonic-gate * flush the cache entry for D, otherwise 44927c478bd9Sstevel@tonic-gate * traffic will stay misrouted until the IRE 44937c478bd9Sstevel@tonic-gate * times out. 44947c478bd9Sstevel@tonic-gate */ 44957c478bd9Sstevel@tonic-gate if ((cire->ire_gateway_addr & ire->ire_mask) == 44967c478bd9Sstevel@tonic-gate (ire->ire_addr & ire->ire_mask)) { 44977c478bd9Sstevel@tonic-gate ire_delete(cire); 44987c478bd9Sstevel@tonic-gate continue; 44997c478bd9Sstevel@tonic-gate } 45007c478bd9Sstevel@tonic-gate } 45017c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 45027c478bd9Sstevel@tonic-gate } 45037c478bd9Sstevel@tonic-gate } else { 45047c478bd9Sstevel@tonic-gate /* 45057c478bd9Sstevel@tonic-gate * delete the cache entries based on 45067c478bd9Sstevel@tonic-gate * handle in the IRE as this IRE is 45077c478bd9Sstevel@tonic-gate * being deleted/changed. 45087c478bd9Sstevel@tonic-gate */ 45097c478bd9Sstevel@tonic-gate for (i = 0; i < ip_cache_table_size; i++) { 45107c478bd9Sstevel@tonic-gate irb = &ip_cache_table[i]; 45117c478bd9Sstevel@tonic-gate if ((cire = irb->irb_ire) == NULL) 45127c478bd9Sstevel@tonic-gate continue; 45137c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 45147c478bd9Sstevel@tonic-gate for (cire = irb->irb_ire; cire != NULL; 45157c478bd9Sstevel@tonic-gate cire = cire->ire_next) { 45167c478bd9Sstevel@tonic-gate if (cire->ire_type != IRE_CACHE) 45177c478bd9Sstevel@tonic-gate continue; 45187c478bd9Sstevel@tonic-gate if ((cire->ire_phandle == 0 || 45197c478bd9Sstevel@tonic-gate cire->ire_phandle != ire->ire_phandle) && 45207c478bd9Sstevel@tonic-gate (cire->ire_ihandle == 0 || 45217c478bd9Sstevel@tonic-gate cire->ire_ihandle != ire->ire_ihandle)) 45227c478bd9Sstevel@tonic-gate continue; 45237c478bd9Sstevel@tonic-gate ire_delete(cire); 45247c478bd9Sstevel@tonic-gate } 45257c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 45267c478bd9Sstevel@tonic-gate } 45277c478bd9Sstevel@tonic-gate } 45287c478bd9Sstevel@tonic-gate } 45297c478bd9Sstevel@tonic-gate 45307c478bd9Sstevel@tonic-gate /* 45317c478bd9Sstevel@tonic-gate * Matches the arguments passed with the values in the ire. 45327c478bd9Sstevel@tonic-gate * 45337c478bd9Sstevel@tonic-gate * Note: for match types that match using "ipif" passed in, ipif 45347c478bd9Sstevel@tonic-gate * must be checked for non-NULL before calling this routine. 45357c478bd9Sstevel@tonic-gate */ 4536c793af95Ssangeeta boolean_t 45377c478bd9Sstevel@tonic-gate ire_match_args(ire_t *ire, ipaddr_t addr, ipaddr_t mask, ipaddr_t gateway, 453845916cd2Sjpk int type, const ipif_t *ipif, zoneid_t zoneid, uint32_t ihandle, 453945916cd2Sjpk const ts_label_t *tsl, int match_flags) 45407c478bd9Sstevel@tonic-gate { 45417c478bd9Sstevel@tonic-gate ill_t *ire_ill = NULL, *dst_ill; 45427c478bd9Sstevel@tonic-gate ill_t *ipif_ill = NULL; 45437c478bd9Sstevel@tonic-gate ill_group_t *ire_ill_group = NULL; 45447c478bd9Sstevel@tonic-gate ill_group_t *ipif_ill_group = NULL; 45457c478bd9Sstevel@tonic-gate 45467c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 45477c478bd9Sstevel@tonic-gate ASSERT((ire->ire_addr & ~ire->ire_mask) == 0); 45487c478bd9Sstevel@tonic-gate ASSERT((!(match_flags & (MATCH_IRE_ILL|MATCH_IRE_ILL_GROUP))) || 45497c478bd9Sstevel@tonic-gate (ipif != NULL && !ipif->ipif_isv6)); 45507c478bd9Sstevel@tonic-gate ASSERT(!(match_flags & MATCH_IRE_WQ)); 45517c478bd9Sstevel@tonic-gate 45527c478bd9Sstevel@tonic-gate /* 45537c478bd9Sstevel@tonic-gate * HIDDEN cache entries have to be looked up specifically with 45547c478bd9Sstevel@tonic-gate * MATCH_IRE_MARK_HIDDEN. MATCH_IRE_MARK_HIDDEN is usually set 45557c478bd9Sstevel@tonic-gate * when the interface is FAILED or INACTIVE. In that case, 45567c478bd9Sstevel@tonic-gate * any IRE_CACHES that exists should be marked with 45577c478bd9Sstevel@tonic-gate * IRE_MARK_HIDDEN. So, we don't really need to match below 45587c478bd9Sstevel@tonic-gate * for IRE_MARK_HIDDEN. But we do so for consistency. 45597c478bd9Sstevel@tonic-gate */ 45607c478bd9Sstevel@tonic-gate if (!(match_flags & MATCH_IRE_MARK_HIDDEN) && 45617c478bd9Sstevel@tonic-gate (ire->ire_marks & IRE_MARK_HIDDEN)) 45627c478bd9Sstevel@tonic-gate return (B_FALSE); 45637c478bd9Sstevel@tonic-gate 456443d18f1cSpriyanka /* 456543d18f1cSpriyanka * MATCH_IRE_MARK_PRIVATE_ADDR is set when IP_NEXTHOP option 456643d18f1cSpriyanka * is used. In that case the routing table is bypassed and the 456743d18f1cSpriyanka * packets are sent directly to the specified nexthop. The 456843d18f1cSpriyanka * IRE_CACHE entry representing this route should be marked 456943d18f1cSpriyanka * with IRE_MARK_PRIVATE_ADDR. 457043d18f1cSpriyanka */ 457143d18f1cSpriyanka 457243d18f1cSpriyanka if (!(match_flags & MATCH_IRE_MARK_PRIVATE_ADDR) && 457343d18f1cSpriyanka (ire->ire_marks & IRE_MARK_PRIVATE_ADDR)) 457443d18f1cSpriyanka return (B_FALSE); 457543d18f1cSpriyanka 457645916cd2Sjpk if (zoneid != ALL_ZONES && zoneid != ire->ire_zoneid && 457745916cd2Sjpk ire->ire_zoneid != ALL_ZONES) { 45787c478bd9Sstevel@tonic-gate /* 45797c478bd9Sstevel@tonic-gate * If MATCH_IRE_ZONEONLY has been set and the supplied zoneid is 45807c478bd9Sstevel@tonic-gate * valid and does not match that of ire_zoneid, a failure to 45817c478bd9Sstevel@tonic-gate * match is reported at this point. Otherwise, since some IREs 45827c478bd9Sstevel@tonic-gate * that are available in the global zone can be used in local 45837c478bd9Sstevel@tonic-gate * zones, additional checks need to be performed: 45847c478bd9Sstevel@tonic-gate * 45857c478bd9Sstevel@tonic-gate * IRE_BROADCAST, IRE_CACHE and IRE_LOOPBACK 45867c478bd9Sstevel@tonic-gate * entries should never be matched in this situation. 45877c478bd9Sstevel@tonic-gate * 45887c478bd9Sstevel@tonic-gate * IRE entries that have an interface associated with them 45897c478bd9Sstevel@tonic-gate * should in general not match unless they are an IRE_LOCAL 45907c478bd9Sstevel@tonic-gate * or in the case when MATCH_IRE_DEFAULT has been set in 45917c478bd9Sstevel@tonic-gate * the caller. In the case of the former, checking of the 45927c478bd9Sstevel@tonic-gate * other fields supplied should take place. 45937c478bd9Sstevel@tonic-gate * 45947c478bd9Sstevel@tonic-gate * In the case where MATCH_IRE_DEFAULT has been set, 45957c478bd9Sstevel@tonic-gate * all of the ipif's associated with the IRE's ill are 45967c478bd9Sstevel@tonic-gate * checked to see if there is a matching zoneid. If any 45977c478bd9Sstevel@tonic-gate * one ipif has a matching zoneid, this IRE is a 45987c478bd9Sstevel@tonic-gate * potential candidate so checking of the other fields 45997c478bd9Sstevel@tonic-gate * takes place. 46007c478bd9Sstevel@tonic-gate * 46017c478bd9Sstevel@tonic-gate * In the case where the IRE_INTERFACE has a usable source 46027c478bd9Sstevel@tonic-gate * address (indicated by ill_usesrc_ifindex) in the 46037c478bd9Sstevel@tonic-gate * correct zone then it's permitted to return this IRE 46047c478bd9Sstevel@tonic-gate */ 46057c478bd9Sstevel@tonic-gate if (match_flags & MATCH_IRE_ZONEONLY) 46067c478bd9Sstevel@tonic-gate return (B_FALSE); 46077c478bd9Sstevel@tonic-gate if (ire->ire_type & (IRE_BROADCAST | IRE_CACHE | IRE_LOOPBACK)) 46087c478bd9Sstevel@tonic-gate return (B_FALSE); 46097c478bd9Sstevel@tonic-gate /* 46107c478bd9Sstevel@tonic-gate * Note, IRE_INTERFACE can have the stq as NULL. For 46117c478bd9Sstevel@tonic-gate * example, if the default multicast route is tied to 46127c478bd9Sstevel@tonic-gate * the loopback address. 46137c478bd9Sstevel@tonic-gate */ 46147c478bd9Sstevel@tonic-gate if ((ire->ire_type & IRE_INTERFACE) && 46157c478bd9Sstevel@tonic-gate (ire->ire_stq != NULL)) { 46167c478bd9Sstevel@tonic-gate dst_ill = (ill_t *)ire->ire_stq->q_ptr; 46177c478bd9Sstevel@tonic-gate /* 46187c478bd9Sstevel@tonic-gate * If there is a usable source address in the 46197c478bd9Sstevel@tonic-gate * zone, then it's ok to return an 46207c478bd9Sstevel@tonic-gate * IRE_INTERFACE 46217c478bd9Sstevel@tonic-gate */ 46227c478bd9Sstevel@tonic-gate if (ipif_usesrc_avail(dst_ill, zoneid)) { 46237c478bd9Sstevel@tonic-gate ip3dbg(("ire_match_args: dst_ill %p match %d\n", 46247c478bd9Sstevel@tonic-gate (void *)dst_ill, 46257c478bd9Sstevel@tonic-gate (ire->ire_addr == (addr & mask)))); 46267c478bd9Sstevel@tonic-gate } else { 46277c478bd9Sstevel@tonic-gate ip3dbg(("ire_match_args: src_ipif NULL" 46287c478bd9Sstevel@tonic-gate " dst_ill %p\n", (void *)dst_ill)); 46297c478bd9Sstevel@tonic-gate return (B_FALSE); 46307c478bd9Sstevel@tonic-gate } 46317c478bd9Sstevel@tonic-gate } 46327c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL && ire->ire_type != IRE_LOCAL && 46337c478bd9Sstevel@tonic-gate !(ire->ire_type & IRE_INTERFACE)) { 46347c478bd9Sstevel@tonic-gate ipif_t *tipif; 46357c478bd9Sstevel@tonic-gate 46367c478bd9Sstevel@tonic-gate if ((match_flags & MATCH_IRE_DEFAULT) == 0) { 46377c478bd9Sstevel@tonic-gate return (B_FALSE); 46387c478bd9Sstevel@tonic-gate } 46397c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_ipif->ipif_ill->ill_lock); 46407c478bd9Sstevel@tonic-gate for (tipif = ire->ire_ipif->ipif_ill->ill_ipif; 46417c478bd9Sstevel@tonic-gate tipif != NULL; tipif = tipif->ipif_next) { 46427c478bd9Sstevel@tonic-gate if (IPIF_CAN_LOOKUP(tipif) && 46437c478bd9Sstevel@tonic-gate (tipif->ipif_flags & IPIF_UP) && 464445916cd2Sjpk (tipif->ipif_zoneid == zoneid || 464545916cd2Sjpk tipif->ipif_zoneid == ALL_ZONES)) 46467c478bd9Sstevel@tonic-gate break; 46477c478bd9Sstevel@tonic-gate } 46487c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_ipif->ipif_ill->ill_lock); 46497c478bd9Sstevel@tonic-gate if (tipif == NULL) { 46507c478bd9Sstevel@tonic-gate return (B_FALSE); 46517c478bd9Sstevel@tonic-gate } 46527c478bd9Sstevel@tonic-gate } 46537c478bd9Sstevel@tonic-gate } 46547c478bd9Sstevel@tonic-gate 46557c478bd9Sstevel@tonic-gate /* 46567c478bd9Sstevel@tonic-gate * For IRE_CACHES, MATCH_IRE_ILL/ILL_GROUP really means that 46577c478bd9Sstevel@tonic-gate * somebody wants to send out on a particular interface which 46587c478bd9Sstevel@tonic-gate * is given by ire_stq and hence use ire_stq to derive the ill 46597c478bd9Sstevel@tonic-gate * value. ire_ipif for IRE_CACHES is just the means of getting 46607c478bd9Sstevel@tonic-gate * a source address i.e ire_src_addr = ire->ire_ipif->ipif_src_addr. 46617c478bd9Sstevel@tonic-gate * ire_to_ill does the right thing for this. 46627c478bd9Sstevel@tonic-gate */ 46637c478bd9Sstevel@tonic-gate if (match_flags & (MATCH_IRE_ILL|MATCH_IRE_ILL_GROUP)) { 46647c478bd9Sstevel@tonic-gate ire_ill = ire_to_ill(ire); 46657c478bd9Sstevel@tonic-gate if (ire_ill != NULL) 46667c478bd9Sstevel@tonic-gate ire_ill_group = ire_ill->ill_group; 46677c478bd9Sstevel@tonic-gate ipif_ill = ipif->ipif_ill; 46687c478bd9Sstevel@tonic-gate ipif_ill_group = ipif_ill->ill_group; 46697c478bd9Sstevel@tonic-gate } 46707c478bd9Sstevel@tonic-gate 46717c478bd9Sstevel@tonic-gate if ((ire->ire_addr == (addr & mask)) && 46727c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_GW)) || 46737c478bd9Sstevel@tonic-gate (ire->ire_gateway_addr == gateway)) && 46747c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_TYPE)) || 46757c478bd9Sstevel@tonic-gate (ire->ire_type & type)) && 46767c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_SRC)) || 46777c478bd9Sstevel@tonic-gate (ire->ire_src_addr == ipif->ipif_src_addr)) && 46787c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_IPIF)) || 46797c478bd9Sstevel@tonic-gate (ire->ire_ipif == ipif)) && 46807c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_MARK_HIDDEN)) || 46817c478bd9Sstevel@tonic-gate (ire->ire_type != IRE_CACHE || 46827c478bd9Sstevel@tonic-gate ire->ire_marks & IRE_MARK_HIDDEN)) && 468343d18f1cSpriyanka ((!(match_flags & MATCH_IRE_MARK_PRIVATE_ADDR)) || 468443d18f1cSpriyanka (ire->ire_type != IRE_CACHE || 468543d18f1cSpriyanka ire->ire_marks & IRE_MARK_PRIVATE_ADDR)) && 46867c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_ILL)) || 46877c478bd9Sstevel@tonic-gate (ire_ill == ipif_ill)) && 46887c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_IHANDLE)) || 46897c478bd9Sstevel@tonic-gate (ire->ire_ihandle == ihandle)) && 4690c793af95Ssangeeta ((!(match_flags & MATCH_IRE_MASK)) || 4691c793af95Ssangeeta (ire->ire_mask == mask)) && 46927c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_ILL_GROUP)) || 46937c478bd9Sstevel@tonic-gate (ire_ill == ipif_ill) || 46947c478bd9Sstevel@tonic-gate (ire_ill_group != NULL && 469545916cd2Sjpk ire_ill_group == ipif_ill_group)) && 469645916cd2Sjpk ((!(match_flags & MATCH_IRE_SECATTR)) || 469745916cd2Sjpk (!is_system_labeled()) || 469845916cd2Sjpk (tsol_ire_match_gwattr(ire, tsl) == 0))) { 46997c478bd9Sstevel@tonic-gate /* We found the matched IRE */ 47007c478bd9Sstevel@tonic-gate return (B_TRUE); 47017c478bd9Sstevel@tonic-gate } 47027c478bd9Sstevel@tonic-gate return (B_FALSE); 47037c478bd9Sstevel@tonic-gate } 47047c478bd9Sstevel@tonic-gate 47057c478bd9Sstevel@tonic-gate 47067c478bd9Sstevel@tonic-gate /* 47077c478bd9Sstevel@tonic-gate * Lookup for a route in all the tables 47087c478bd9Sstevel@tonic-gate */ 47097c478bd9Sstevel@tonic-gate ire_t * 47107c478bd9Sstevel@tonic-gate ire_route_lookup(ipaddr_t addr, ipaddr_t mask, ipaddr_t gateway, 471145916cd2Sjpk int type, const ipif_t *ipif, ire_t **pire, zoneid_t zoneid, 471245916cd2Sjpk const ts_label_t *tsl, int flags) 47137c478bd9Sstevel@tonic-gate { 47147c478bd9Sstevel@tonic-gate ire_t *ire = NULL; 47157c478bd9Sstevel@tonic-gate 47167c478bd9Sstevel@tonic-gate /* 47177c478bd9Sstevel@tonic-gate * ire_match_args() will dereference ipif MATCH_IRE_SRC or 47187c478bd9Sstevel@tonic-gate * MATCH_IRE_ILL is set. 47197c478bd9Sstevel@tonic-gate */ 47207c478bd9Sstevel@tonic-gate if ((flags & (MATCH_IRE_SRC | MATCH_IRE_ILL | MATCH_IRE_ILL_GROUP)) && 47217c478bd9Sstevel@tonic-gate (ipif == NULL)) 47227c478bd9Sstevel@tonic-gate return (NULL); 47237c478bd9Sstevel@tonic-gate 47247c478bd9Sstevel@tonic-gate /* 47257c478bd9Sstevel@tonic-gate * might be asking for a cache lookup, 47267c478bd9Sstevel@tonic-gate * This is not best way to lookup cache, 47277c478bd9Sstevel@tonic-gate * user should call ire_cache_lookup directly. 47287c478bd9Sstevel@tonic-gate * 47297c478bd9Sstevel@tonic-gate * If MATCH_IRE_TYPE was set, first lookup in the cache table and then 47307c478bd9Sstevel@tonic-gate * in the forwarding table, if the applicable type flags were set. 47317c478bd9Sstevel@tonic-gate */ 47327c478bd9Sstevel@tonic-gate if ((flags & MATCH_IRE_TYPE) == 0 || (type & IRE_CACHETABLE) != 0) { 47337c478bd9Sstevel@tonic-gate ire = ire_ctable_lookup(addr, gateway, type, ipif, zoneid, 473445916cd2Sjpk tsl, flags); 47357c478bd9Sstevel@tonic-gate if (ire != NULL) 47367c478bd9Sstevel@tonic-gate return (ire); 47377c478bd9Sstevel@tonic-gate } 47387c478bd9Sstevel@tonic-gate if ((flags & MATCH_IRE_TYPE) == 0 || (type & IRE_FORWARDTABLE) != 0) { 47397c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(addr, mask, gateway, type, ipif, pire, 474045916cd2Sjpk zoneid, 0, tsl, flags); 47417c478bd9Sstevel@tonic-gate } 47427c478bd9Sstevel@tonic-gate return (ire); 47437c478bd9Sstevel@tonic-gate } 47447c478bd9Sstevel@tonic-gate 47457c478bd9Sstevel@tonic-gate 47467c478bd9Sstevel@tonic-gate /* 474745916cd2Sjpk * Delete the IRE cache for the gateway and all IRE caches whose 474845916cd2Sjpk * ire_gateway_addr points to this gateway, and allow them to 474945916cd2Sjpk * be created on demand by ip_newroute. 475045916cd2Sjpk */ 475145916cd2Sjpk void 475245916cd2Sjpk ire_clookup_delete_cache_gw(ipaddr_t addr, zoneid_t zoneid) 475345916cd2Sjpk { 475445916cd2Sjpk irb_t *irb; 475545916cd2Sjpk ire_t *ire; 475645916cd2Sjpk 475745916cd2Sjpk irb = &ip_cache_table[IRE_ADDR_HASH(addr, ip_cache_table_size)]; 475845916cd2Sjpk IRB_REFHOLD(irb); 475945916cd2Sjpk for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 476045916cd2Sjpk if (ire->ire_marks & IRE_MARK_CONDEMNED) 476145916cd2Sjpk continue; 476245916cd2Sjpk 476345916cd2Sjpk ASSERT(ire->ire_mask == IP_HOST_MASK); 476445916cd2Sjpk ASSERT(ire->ire_type != IRE_MIPRTUN && ire->ire_in_ill == NULL); 476545916cd2Sjpk if (ire_match_args(ire, addr, ire->ire_mask, 0, IRE_CACHE, 476645916cd2Sjpk NULL, zoneid, 0, NULL, MATCH_IRE_TYPE)) { 476745916cd2Sjpk ire_delete(ire); 476845916cd2Sjpk } 476945916cd2Sjpk } 477045916cd2Sjpk IRB_REFRELE(irb); 477145916cd2Sjpk 477245916cd2Sjpk ire_walk_v4(ire_delete_cache_gw, &addr, zoneid); 477345916cd2Sjpk } 477445916cd2Sjpk 477545916cd2Sjpk /* 47767c478bd9Sstevel@tonic-gate * Looks up cache table for a route. 47777c478bd9Sstevel@tonic-gate * specific lookup can be indicated by 47787c478bd9Sstevel@tonic-gate * passing the MATCH_* flags and the 47797c478bd9Sstevel@tonic-gate * necessary parameters. 47807c478bd9Sstevel@tonic-gate */ 47817c478bd9Sstevel@tonic-gate ire_t * 478245916cd2Sjpk ire_ctable_lookup(ipaddr_t addr, ipaddr_t gateway, int type, const ipif_t *ipif, 478345916cd2Sjpk zoneid_t zoneid, const ts_label_t *tsl, int flags) 47847c478bd9Sstevel@tonic-gate { 47857c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 47867c478bd9Sstevel@tonic-gate ire_t *ire; 47877c478bd9Sstevel@tonic-gate 47887c478bd9Sstevel@tonic-gate /* 47897c478bd9Sstevel@tonic-gate * ire_match_args() will dereference ipif MATCH_IRE_SRC or 47907c478bd9Sstevel@tonic-gate * MATCH_IRE_ILL is set. 47917c478bd9Sstevel@tonic-gate */ 47927c478bd9Sstevel@tonic-gate if ((flags & (MATCH_IRE_SRC | MATCH_IRE_ILL | MATCH_IRE_ILL_GROUP)) && 47937c478bd9Sstevel@tonic-gate (ipif == NULL)) 47947c478bd9Sstevel@tonic-gate return (NULL); 47957c478bd9Sstevel@tonic-gate 47967c478bd9Sstevel@tonic-gate irb_ptr = &ip_cache_table[IRE_ADDR_HASH(addr, ip_cache_table_size)]; 47977c478bd9Sstevel@tonic-gate rw_enter(&irb_ptr->irb_lock, RW_READER); 47987c478bd9Sstevel@tonic-gate for (ire = irb_ptr->irb_ire; ire != NULL; ire = ire->ire_next) { 47997c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_CONDEMNED) 48007c478bd9Sstevel@tonic-gate continue; 48017c478bd9Sstevel@tonic-gate ASSERT(ire->ire_mask == IP_HOST_MASK); 48027c478bd9Sstevel@tonic-gate ASSERT(ire->ire_type != IRE_MIPRTUN && ire->ire_in_ill == NULL); 48037c478bd9Sstevel@tonic-gate if (ire_match_args(ire, addr, ire->ire_mask, gateway, type, 480445916cd2Sjpk ipif, zoneid, 0, tsl, flags)) { 48057c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 48067c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 48077c478bd9Sstevel@tonic-gate return (ire); 48087c478bd9Sstevel@tonic-gate } 48097c478bd9Sstevel@tonic-gate } 48107c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 48117c478bd9Sstevel@tonic-gate return (NULL); 48127c478bd9Sstevel@tonic-gate } 48137c478bd9Sstevel@tonic-gate 48147c478bd9Sstevel@tonic-gate /* 4815*5597b60aSnordmark * Check whether the IRE_LOCAL and the IRE potentially used to transmit 4816*5597b60aSnordmark * (could be an IRE_CACHE, IRE_BROADCAST, or IRE_INTERFACE) are part of 4817*5597b60aSnordmark * the same ill group. 4818*5597b60aSnordmark */ 4819*5597b60aSnordmark boolean_t 4820*5597b60aSnordmark ire_local_same_ill_group(ire_t *ire_local, ire_t *xmit_ire) 4821*5597b60aSnordmark { 4822*5597b60aSnordmark ill_t *recv_ill, *xmit_ill; 4823*5597b60aSnordmark ill_group_t *recv_group, *xmit_group; 4824*5597b60aSnordmark 4825*5597b60aSnordmark ASSERT(ire_local->ire_type == IRE_LOCAL); 4826*5597b60aSnordmark ASSERT(ire_local->ire_rfq != NULL); 4827*5597b60aSnordmark ASSERT(xmit_ire->ire_type & (IRE_CACHE|IRE_BROADCAST|IRE_INTERFACE)); 4828*5597b60aSnordmark ASSERT(xmit_ire->ire_stq != NULL); 4829*5597b60aSnordmark ASSERT(xmit_ire->ire_ipif != NULL); 4830*5597b60aSnordmark 4831*5597b60aSnordmark recv_ill = ire_local->ire_rfq->q_ptr; 4832*5597b60aSnordmark xmit_ill = xmit_ire->ire_stq->q_ptr; 4833*5597b60aSnordmark 4834*5597b60aSnordmark if (recv_ill == xmit_ill) 4835*5597b60aSnordmark return (B_TRUE); 4836*5597b60aSnordmark 4837*5597b60aSnordmark recv_group = recv_ill->ill_group; 4838*5597b60aSnordmark xmit_group = xmit_ill->ill_group; 4839*5597b60aSnordmark 4840*5597b60aSnordmark if (recv_group != NULL && recv_group == xmit_group) 4841*5597b60aSnordmark return (B_TRUE); 4842*5597b60aSnordmark 4843*5597b60aSnordmark return (B_FALSE); 4844*5597b60aSnordmark } 4845*5597b60aSnordmark 4846*5597b60aSnordmark /* 4847*5597b60aSnordmark * Check if the IRE_LOCAL uses the same ill (group) as another route would use. 4848*5597b60aSnordmark */ 4849*5597b60aSnordmark boolean_t 4850*5597b60aSnordmark ire_local_ok_across_zones(ire_t *ire_local, zoneid_t zoneid, void *addr, 4851*5597b60aSnordmark const ts_label_t *tsl) 4852*5597b60aSnordmark { 4853*5597b60aSnordmark ire_t *alt_ire; 4854*5597b60aSnordmark boolean_t rval; 4855*5597b60aSnordmark 4856*5597b60aSnordmark if (ire_local->ire_ipversion == IPV4_VERSION) { 4857*5597b60aSnordmark alt_ire = ire_ftable_lookup(*((ipaddr_t *)addr), 0, 0, 0, NULL, 4858*5597b60aSnordmark NULL, zoneid, 0, tsl, 4859*5597b60aSnordmark MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | 4860*5597b60aSnordmark MATCH_IRE_RJ_BHOLE); 4861*5597b60aSnordmark } else { 4862*5597b60aSnordmark alt_ire = ire_ftable_lookup_v6((in6_addr_t *)addr, NULL, NULL, 4863*5597b60aSnordmark 0, NULL, NULL, zoneid, 0, tsl, 4864*5597b60aSnordmark MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | 4865*5597b60aSnordmark MATCH_IRE_RJ_BHOLE); 4866*5597b60aSnordmark } 4867*5597b60aSnordmark 4868*5597b60aSnordmark if (alt_ire == NULL) 4869*5597b60aSnordmark return (B_FALSE); 4870*5597b60aSnordmark 4871*5597b60aSnordmark rval = ire_local_same_ill_group(ire_local, alt_ire); 4872*5597b60aSnordmark 4873*5597b60aSnordmark ire_refrele(alt_ire); 4874*5597b60aSnordmark return (rval); 4875*5597b60aSnordmark } 4876*5597b60aSnordmark 4877*5597b60aSnordmark /* 48787c478bd9Sstevel@tonic-gate * Lookup cache. Don't return IRE_MARK_HIDDEN entries. Callers 48797c478bd9Sstevel@tonic-gate * should use ire_ctable_lookup with MATCH_IRE_MARK_HIDDEN to get 48807c478bd9Sstevel@tonic-gate * to the hidden ones. 4881*5597b60aSnordmark * 4882*5597b60aSnordmark * In general the zoneid has to match (where ALL_ZONES match all of them). 4883*5597b60aSnordmark * But for IRE_LOCAL we also need to handle the case where L2 should 4884*5597b60aSnordmark * conceptually loop back the packet. This is necessary since neither 4885*5597b60aSnordmark * Ethernet drivers nor Ethernet hardware loops back packets sent to their 4886*5597b60aSnordmark * own MAC address. This loopback is needed when the normal 4887*5597b60aSnordmark * routes (ignoring IREs with different zoneids) would send out the packet on 4888*5597b60aSnordmark * the same ill (or ill group) as the ill with which this IRE_LOCAL is 4889*5597b60aSnordmark * associated. 4890*5597b60aSnordmark * 4891*5597b60aSnordmark * Earlier versions of this code always matched an IRE_LOCAL independently of 4892*5597b60aSnordmark * the zoneid. We preserve that earlier behavior when 4893*5597b60aSnordmark * ip_restrict_interzone_loopback is turned off. 48947c478bd9Sstevel@tonic-gate */ 48957c478bd9Sstevel@tonic-gate ire_t * 489645916cd2Sjpk ire_cache_lookup(ipaddr_t addr, zoneid_t zoneid, const ts_label_t *tsl) 48977c478bd9Sstevel@tonic-gate { 48987c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 48997c478bd9Sstevel@tonic-gate ire_t *ire; 49007c478bd9Sstevel@tonic-gate 49017c478bd9Sstevel@tonic-gate irb_ptr = &ip_cache_table[IRE_ADDR_HASH(addr, ip_cache_table_size)]; 49027c478bd9Sstevel@tonic-gate rw_enter(&irb_ptr->irb_lock, RW_READER); 49037c478bd9Sstevel@tonic-gate for (ire = irb_ptr->irb_ire; ire != NULL; ire = ire->ire_next) { 490443d18f1cSpriyanka if (ire->ire_marks & (IRE_MARK_CONDEMNED | 490543d18f1cSpriyanka IRE_MARK_HIDDEN | IRE_MARK_PRIVATE_ADDR)) { 49067c478bd9Sstevel@tonic-gate continue; 490743d18f1cSpriyanka } 49087c478bd9Sstevel@tonic-gate if (ire->ire_addr == addr) { 490945916cd2Sjpk /* 491045916cd2Sjpk * Finally, check if the security policy has any 491145916cd2Sjpk * restriction on using this route for the specified 491245916cd2Sjpk * message. 491345916cd2Sjpk */ 491445916cd2Sjpk if (tsl != NULL && 491545916cd2Sjpk ire->ire_gw_secattr != NULL && 491645916cd2Sjpk tsol_ire_match_gwattr(ire, tsl) != 0) { 491745916cd2Sjpk continue; 491845916cd2Sjpk } 491945916cd2Sjpk 49207c478bd9Sstevel@tonic-gate if (zoneid == ALL_ZONES || ire->ire_zoneid == zoneid || 4921*5597b60aSnordmark ire->ire_zoneid == ALL_ZONES) { 4922*5597b60aSnordmark IRE_REFHOLD(ire); 4923*5597b60aSnordmark rw_exit(&irb_ptr->irb_lock); 4924*5597b60aSnordmark return (ire); 4925*5597b60aSnordmark } 4926*5597b60aSnordmark 4927*5597b60aSnordmark if (ire->ire_type == IRE_LOCAL) { 4928*5597b60aSnordmark if (ip_restrict_interzone_loopback && 4929*5597b60aSnordmark !ire_local_ok_across_zones(ire, zoneid, 4930*5597b60aSnordmark &addr, tsl)) 4931*5597b60aSnordmark continue; 4932*5597b60aSnordmark 49337c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 49347c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 49357c478bd9Sstevel@tonic-gate return (ire); 49367c478bd9Sstevel@tonic-gate } 49377c478bd9Sstevel@tonic-gate } 49387c478bd9Sstevel@tonic-gate } 49397c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 49407c478bd9Sstevel@tonic-gate return (NULL); 49417c478bd9Sstevel@tonic-gate } 49427c478bd9Sstevel@tonic-gate 49437c478bd9Sstevel@tonic-gate /* 49447c478bd9Sstevel@tonic-gate * Locate the interface ire that is tied to the cache ire 'cire' via 49457c478bd9Sstevel@tonic-gate * cire->ire_ihandle. 49467c478bd9Sstevel@tonic-gate * 49477c478bd9Sstevel@tonic-gate * We are trying to create the cache ire for an offlink destn based 49487c478bd9Sstevel@tonic-gate * on the cache ire of the gateway in 'cire'. 'pire' is the prefix ire 49497c478bd9Sstevel@tonic-gate * as found by ip_newroute(). We are called from ip_newroute() in 49507c478bd9Sstevel@tonic-gate * the IRE_CACHE case. 49517c478bd9Sstevel@tonic-gate */ 49527c478bd9Sstevel@tonic-gate ire_t * 49537c478bd9Sstevel@tonic-gate ire_ihandle_lookup_offlink(ire_t *cire, ire_t *pire) 49547c478bd9Sstevel@tonic-gate { 49557c478bd9Sstevel@tonic-gate ire_t *ire; 49567c478bd9Sstevel@tonic-gate int match_flags; 49577c478bd9Sstevel@tonic-gate ipaddr_t gw_addr; 49587c478bd9Sstevel@tonic-gate ipif_t *gw_ipif; 49597c478bd9Sstevel@tonic-gate 49607c478bd9Sstevel@tonic-gate ASSERT(cire != NULL && pire != NULL); 49617c478bd9Sstevel@tonic-gate 49627c478bd9Sstevel@tonic-gate /* 49637c478bd9Sstevel@tonic-gate * We don't need to specify the zoneid to ire_ftable_lookup() below 49647c478bd9Sstevel@tonic-gate * because the ihandle refers to an ipif which can be in only one zone. 49657c478bd9Sstevel@tonic-gate */ 49667c478bd9Sstevel@tonic-gate match_flags = MATCH_IRE_TYPE | MATCH_IRE_IHANDLE | MATCH_IRE_MASK; 49677c478bd9Sstevel@tonic-gate /* 49687c478bd9Sstevel@tonic-gate * ip_newroute calls ire_ftable_lookup with MATCH_IRE_ILL only 49697c478bd9Sstevel@tonic-gate * for on-link hosts. We should never be here for onlink. 49707c478bd9Sstevel@tonic-gate * Thus, use MATCH_IRE_ILL_GROUP. 49717c478bd9Sstevel@tonic-gate */ 49727c478bd9Sstevel@tonic-gate if (pire->ire_ipif != NULL) 49737c478bd9Sstevel@tonic-gate match_flags |= MATCH_IRE_ILL_GROUP; 49747c478bd9Sstevel@tonic-gate /* 49757c478bd9Sstevel@tonic-gate * We know that the mask of the interface ire equals cire->ire_cmask. 49767c478bd9Sstevel@tonic-gate * (When ip_newroute() created 'cire' for the gateway it set its 49777c478bd9Sstevel@tonic-gate * cmask from the interface ire's mask) 49787c478bd9Sstevel@tonic-gate */ 49797c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(cire->ire_addr, cire->ire_cmask, 0, 49807c478bd9Sstevel@tonic-gate IRE_INTERFACE, pire->ire_ipif, NULL, ALL_ZONES, cire->ire_ihandle, 498145916cd2Sjpk NULL, match_flags); 49827c478bd9Sstevel@tonic-gate if (ire != NULL) 49837c478bd9Sstevel@tonic-gate return (ire); 49847c478bd9Sstevel@tonic-gate /* 49857c478bd9Sstevel@tonic-gate * If we didn't find an interface ire above, we can't declare failure. 49867c478bd9Sstevel@tonic-gate * For backwards compatibility, we need to support prefix routes 49877c478bd9Sstevel@tonic-gate * pointing to next hop gateways that are not on-link. 49887c478bd9Sstevel@tonic-gate * 49897c478bd9Sstevel@tonic-gate * Assume we are trying to ping some offlink destn, and we have the 49907c478bd9Sstevel@tonic-gate * routing table below. 49917c478bd9Sstevel@tonic-gate * 49927c478bd9Sstevel@tonic-gate * Eg. default - gw1 <--- pire (line 1) 49937c478bd9Sstevel@tonic-gate * gw1 - gw2 (line 2) 49947c478bd9Sstevel@tonic-gate * gw2 - hme0 (line 3) 49957c478bd9Sstevel@tonic-gate * 49967c478bd9Sstevel@tonic-gate * If we already have a cache ire for gw1 in 'cire', the 49977c478bd9Sstevel@tonic-gate * ire_ftable_lookup above would have failed, since there is no 49987c478bd9Sstevel@tonic-gate * interface ire to reach gw1. We will fallthru below. 49997c478bd9Sstevel@tonic-gate * 50007c478bd9Sstevel@tonic-gate * Here we duplicate the steps that ire_ftable_lookup() did in 50017c478bd9Sstevel@tonic-gate * getting 'cire' from 'pire', in the MATCH_IRE_RECURSIVE case. 50027c478bd9Sstevel@tonic-gate * The differences are the following 50037c478bd9Sstevel@tonic-gate * i. We want the interface ire only, so we call ire_ftable_lookup() 50047c478bd9Sstevel@tonic-gate * instead of ire_route_lookup() 50057c478bd9Sstevel@tonic-gate * ii. We look for only prefix routes in the 1st call below. 50067c478bd9Sstevel@tonic-gate * ii. We want to match on the ihandle in the 2nd call below. 50077c478bd9Sstevel@tonic-gate */ 50087c478bd9Sstevel@tonic-gate match_flags = MATCH_IRE_TYPE; 50097c478bd9Sstevel@tonic-gate if (pire->ire_ipif != NULL) 50107c478bd9Sstevel@tonic-gate match_flags |= MATCH_IRE_ILL_GROUP; 50117c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(pire->ire_gateway_addr, 0, 0, IRE_OFFSUBNET, 501245916cd2Sjpk pire->ire_ipif, NULL, ALL_ZONES, 0, NULL, match_flags); 50137c478bd9Sstevel@tonic-gate if (ire == NULL) 50147c478bd9Sstevel@tonic-gate return (NULL); 50157c478bd9Sstevel@tonic-gate /* 50167c478bd9Sstevel@tonic-gate * At this point 'ire' corresponds to the entry shown in line 2. 50177c478bd9Sstevel@tonic-gate * gw_addr is 'gw2' in the example above. 50187c478bd9Sstevel@tonic-gate */ 50197c478bd9Sstevel@tonic-gate gw_addr = ire->ire_gateway_addr; 50207c478bd9Sstevel@tonic-gate gw_ipif = ire->ire_ipif; 50217c478bd9Sstevel@tonic-gate ire_refrele(ire); 50227c478bd9Sstevel@tonic-gate 50237c478bd9Sstevel@tonic-gate match_flags |= MATCH_IRE_IHANDLE; 50247c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(gw_addr, 0, 0, IRE_INTERFACE, 502545916cd2Sjpk gw_ipif, NULL, ALL_ZONES, cire->ire_ihandle, NULL, match_flags); 50267c478bd9Sstevel@tonic-gate return (ire); 50277c478bd9Sstevel@tonic-gate } 50287c478bd9Sstevel@tonic-gate 50297c478bd9Sstevel@tonic-gate /* 50307c478bd9Sstevel@tonic-gate * ire_mrtun_lookup() is called by ip_rput() when packet is to be 50317c478bd9Sstevel@tonic-gate * tunneled through reverse tunnel. This is only supported for 50327c478bd9Sstevel@tonic-gate * IPv4 packets 50337c478bd9Sstevel@tonic-gate */ 50347c478bd9Sstevel@tonic-gate 50357c478bd9Sstevel@tonic-gate ire_t * 50367c478bd9Sstevel@tonic-gate ire_mrtun_lookup(ipaddr_t srcaddr, ill_t *ill) 50377c478bd9Sstevel@tonic-gate { 50387c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 50397c478bd9Sstevel@tonic-gate ire_t *ire; 50407c478bd9Sstevel@tonic-gate 50417c478bd9Sstevel@tonic-gate ASSERT(ill != NULL); 50427c478bd9Sstevel@tonic-gate ASSERT(!(ill->ill_isv6)); 50437c478bd9Sstevel@tonic-gate 50447c478bd9Sstevel@tonic-gate if (ip_mrtun_table == NULL) 50457c478bd9Sstevel@tonic-gate return (NULL); 50467c478bd9Sstevel@tonic-gate irb_ptr = &ip_mrtun_table[IRE_ADDR_HASH(srcaddr, IP_MRTUN_TABLE_SIZE)]; 50477c478bd9Sstevel@tonic-gate rw_enter(&irb_ptr->irb_lock, RW_READER); 50487c478bd9Sstevel@tonic-gate for (ire = irb_ptr->irb_ire; ire != NULL; ire = ire->ire_next) { 50497c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_CONDEMNED) 50507c478bd9Sstevel@tonic-gate continue; 50517c478bd9Sstevel@tonic-gate if ((ire->ire_in_src_addr == srcaddr) && 50527c478bd9Sstevel@tonic-gate ire->ire_in_ill == ill) { 50537c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 50547c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 50557c478bd9Sstevel@tonic-gate return (ire); 50567c478bd9Sstevel@tonic-gate } 50577c478bd9Sstevel@tonic-gate } 50587c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 50597c478bd9Sstevel@tonic-gate return (NULL); 50607c478bd9Sstevel@tonic-gate } 50617c478bd9Sstevel@tonic-gate 50627c478bd9Sstevel@tonic-gate /* 50637c478bd9Sstevel@tonic-gate * Return the IRE_LOOPBACK, IRE_IF_RESOLVER or IRE_IF_NORESOLVER 50647c478bd9Sstevel@tonic-gate * ire associated with the specified ipif. 50657c478bd9Sstevel@tonic-gate * 50667c478bd9Sstevel@tonic-gate * This might occasionally be called when IPIF_UP is not set since 50677c478bd9Sstevel@tonic-gate * the IP_MULTICAST_IF as well as creating interface routes 50687c478bd9Sstevel@tonic-gate * allows specifying a down ipif (ipif_lookup* match ipifs that are down). 50697c478bd9Sstevel@tonic-gate * 50707c478bd9Sstevel@tonic-gate * Note that if IPIF_NOLOCAL, IPIF_NOXMIT, or IPIF_DEPRECATED is set on 50717c478bd9Sstevel@tonic-gate * the ipif, this routine might return NULL. 50727c478bd9Sstevel@tonic-gate */ 50737c478bd9Sstevel@tonic-gate ire_t * 507445916cd2Sjpk ipif_to_ire(const ipif_t *ipif) 50757c478bd9Sstevel@tonic-gate { 50767c478bd9Sstevel@tonic-gate ire_t *ire; 50777c478bd9Sstevel@tonic-gate 50787c478bd9Sstevel@tonic-gate ASSERT(!ipif->ipif_isv6); 50797c478bd9Sstevel@tonic-gate if (ipif->ipif_ire_type == IRE_LOOPBACK) { 50807c478bd9Sstevel@tonic-gate ire = ire_ctable_lookup(ipif->ipif_lcl_addr, 0, IRE_LOOPBACK, 508145916cd2Sjpk ipif, ALL_ZONES, NULL, (MATCH_IRE_TYPE | MATCH_IRE_IPIF)); 50827c478bd9Sstevel@tonic-gate } else if (ipif->ipif_flags & IPIF_POINTOPOINT) { 50837c478bd9Sstevel@tonic-gate /* In this case we need to lookup destination address. */ 50847c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(ipif->ipif_pp_dst_addr, IP_HOST_MASK, 0, 508545916cd2Sjpk IRE_INTERFACE, ipif, NULL, ALL_ZONES, 0, NULL, 50867c478bd9Sstevel@tonic-gate (MATCH_IRE_TYPE | MATCH_IRE_IPIF | MATCH_IRE_MASK)); 50877c478bd9Sstevel@tonic-gate } else { 50887c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(ipif->ipif_subnet, 50897c478bd9Sstevel@tonic-gate ipif->ipif_net_mask, 0, IRE_INTERFACE, ipif, NULL, 509045916cd2Sjpk ALL_ZONES, 0, NULL, (MATCH_IRE_TYPE | MATCH_IRE_IPIF | 50917c478bd9Sstevel@tonic-gate MATCH_IRE_MASK)); 50927c478bd9Sstevel@tonic-gate } 50937c478bd9Sstevel@tonic-gate return (ire); 50947c478bd9Sstevel@tonic-gate } 50957c478bd9Sstevel@tonic-gate 50967c478bd9Sstevel@tonic-gate /* 50977c478bd9Sstevel@tonic-gate * ire_walk function. 50987c478bd9Sstevel@tonic-gate * Count the number of IRE_CACHE entries in different categories. 50997c478bd9Sstevel@tonic-gate */ 51007c478bd9Sstevel@tonic-gate void 51017c478bd9Sstevel@tonic-gate ire_cache_count(ire_t *ire, char *arg) 51027c478bd9Sstevel@tonic-gate { 51037c478bd9Sstevel@tonic-gate ire_cache_count_t *icc = (ire_cache_count_t *)arg; 51047c478bd9Sstevel@tonic-gate 51057c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) 51067c478bd9Sstevel@tonic-gate return; 51077c478bd9Sstevel@tonic-gate 51087c478bd9Sstevel@tonic-gate icc->icc_total++; 51097c478bd9Sstevel@tonic-gate 51107c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 51117c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 51127c478bd9Sstevel@tonic-gate if (IN6_IS_ADDR_UNSPECIFIED(&ire->ire_gateway_addr_v6)) { 51137c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 51147c478bd9Sstevel@tonic-gate icc->icc_onlink++; 51157c478bd9Sstevel@tonic-gate return; 51167c478bd9Sstevel@tonic-gate } 51177c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 51187c478bd9Sstevel@tonic-gate } else { 51197c478bd9Sstevel@tonic-gate if (ire->ire_gateway_addr == 0) { 51207c478bd9Sstevel@tonic-gate icc->icc_onlink++; 51217c478bd9Sstevel@tonic-gate return; 51227c478bd9Sstevel@tonic-gate } 51237c478bd9Sstevel@tonic-gate } 51247c478bd9Sstevel@tonic-gate 51257c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipif != NULL); 51267c478bd9Sstevel@tonic-gate if (ire->ire_max_frag < ire->ire_ipif->ipif_mtu) 51277c478bd9Sstevel@tonic-gate icc->icc_pmtu++; 51287c478bd9Sstevel@tonic-gate else if (ire->ire_tire_mark != ire->ire_ob_pkt_count + 51297c478bd9Sstevel@tonic-gate ire->ire_ib_pkt_count) 51307c478bd9Sstevel@tonic-gate icc->icc_offlink++; 51317c478bd9Sstevel@tonic-gate else 51327c478bd9Sstevel@tonic-gate icc->icc_unused++; 51337c478bd9Sstevel@tonic-gate } 51347c478bd9Sstevel@tonic-gate 51357c478bd9Sstevel@tonic-gate /* 51367c478bd9Sstevel@tonic-gate * ire_walk function called by ip_trash_ire_reclaim(). 51377c478bd9Sstevel@tonic-gate * Free a fraction of the IRE_CACHE cache entries. The fractions are 51387c478bd9Sstevel@tonic-gate * different for different categories of IRE_CACHE entries. 51397c478bd9Sstevel@tonic-gate * A fraction of zero means to not free any in that category. 51407c478bd9Sstevel@tonic-gate * Use the hash bucket id plus lbolt as a random number. Thus if the fraction 51417c478bd9Sstevel@tonic-gate * is N then every Nth hash bucket chain will be freed. 51427c478bd9Sstevel@tonic-gate */ 51437c478bd9Sstevel@tonic-gate void 51447c478bd9Sstevel@tonic-gate ire_cache_reclaim(ire_t *ire, char *arg) 51457c478bd9Sstevel@tonic-gate { 51467c478bd9Sstevel@tonic-gate ire_cache_reclaim_t *icr = (ire_cache_reclaim_t *)arg; 51477c478bd9Sstevel@tonic-gate uint_t rand; 51487c478bd9Sstevel@tonic-gate 51497c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) 51507c478bd9Sstevel@tonic-gate return; 51517c478bd9Sstevel@tonic-gate 51527c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 51537c478bd9Sstevel@tonic-gate rand = (uint_t)lbolt + 51547c478bd9Sstevel@tonic-gate IRE_ADDR_HASH_V6(ire->ire_addr_v6, ip6_cache_table_size); 51557c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 51567c478bd9Sstevel@tonic-gate if (IN6_IS_ADDR_UNSPECIFIED(&ire->ire_gateway_addr_v6)) { 51577c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 51587c478bd9Sstevel@tonic-gate if (icr->icr_onlink != 0 && 51597c478bd9Sstevel@tonic-gate (rand/icr->icr_onlink)*icr->icr_onlink == rand) { 51607c478bd9Sstevel@tonic-gate ire_delete(ire); 51617c478bd9Sstevel@tonic-gate return; 51627c478bd9Sstevel@tonic-gate } 51637c478bd9Sstevel@tonic-gate goto done; 51647c478bd9Sstevel@tonic-gate } 51657c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 51667c478bd9Sstevel@tonic-gate } else { 51677c478bd9Sstevel@tonic-gate rand = (uint_t)lbolt + 51687c478bd9Sstevel@tonic-gate IRE_ADDR_HASH(ire->ire_addr, ip_cache_table_size); 51697c478bd9Sstevel@tonic-gate if (ire->ire_gateway_addr == 0) { 51707c478bd9Sstevel@tonic-gate if (icr->icr_onlink != 0 && 51717c478bd9Sstevel@tonic-gate (rand/icr->icr_onlink)*icr->icr_onlink == rand) { 51727c478bd9Sstevel@tonic-gate ire_delete(ire); 51737c478bd9Sstevel@tonic-gate return; 51747c478bd9Sstevel@tonic-gate } 51757c478bd9Sstevel@tonic-gate goto done; 51767c478bd9Sstevel@tonic-gate } 51777c478bd9Sstevel@tonic-gate } 51787c478bd9Sstevel@tonic-gate /* Not onlink IRE */ 51797c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipif != NULL); 51807c478bd9Sstevel@tonic-gate if (ire->ire_max_frag < ire->ire_ipif->ipif_mtu) { 51817c478bd9Sstevel@tonic-gate /* Use ptmu fraction */ 51827c478bd9Sstevel@tonic-gate if (icr->icr_pmtu != 0 && 51837c478bd9Sstevel@tonic-gate (rand/icr->icr_pmtu)*icr->icr_pmtu == rand) { 51847c478bd9Sstevel@tonic-gate ire_delete(ire); 51857c478bd9Sstevel@tonic-gate return; 51867c478bd9Sstevel@tonic-gate } 51877c478bd9Sstevel@tonic-gate } else if (ire->ire_tire_mark != ire->ire_ob_pkt_count + 51887c478bd9Sstevel@tonic-gate ire->ire_ib_pkt_count) { 51897c478bd9Sstevel@tonic-gate /* Use offlink fraction */ 51907c478bd9Sstevel@tonic-gate if (icr->icr_offlink != 0 && 51917c478bd9Sstevel@tonic-gate (rand/icr->icr_offlink)*icr->icr_offlink == rand) { 51927c478bd9Sstevel@tonic-gate ire_delete(ire); 51937c478bd9Sstevel@tonic-gate return; 51947c478bd9Sstevel@tonic-gate } 51957c478bd9Sstevel@tonic-gate } else { 51967c478bd9Sstevel@tonic-gate /* Use unused fraction */ 51977c478bd9Sstevel@tonic-gate if (icr->icr_unused != 0 && 51987c478bd9Sstevel@tonic-gate (rand/icr->icr_unused)*icr->icr_unused == rand) { 51997c478bd9Sstevel@tonic-gate ire_delete(ire); 52007c478bd9Sstevel@tonic-gate return; 52017c478bd9Sstevel@tonic-gate } 52027c478bd9Sstevel@tonic-gate } 52037c478bd9Sstevel@tonic-gate done: 52047c478bd9Sstevel@tonic-gate /* 52057c478bd9Sstevel@tonic-gate * Update tire_mark so that those that haven't been used since this 52067c478bd9Sstevel@tonic-gate * reclaim will be considered unused next time we reclaim. 52077c478bd9Sstevel@tonic-gate */ 52087c478bd9Sstevel@tonic-gate ire->ire_tire_mark = ire->ire_ob_pkt_count + ire->ire_ib_pkt_count; 52097c478bd9Sstevel@tonic-gate } 52107c478bd9Sstevel@tonic-gate 52117c478bd9Sstevel@tonic-gate static void 52127c478bd9Sstevel@tonic-gate power2_roundup(uint32_t *value) 52137c478bd9Sstevel@tonic-gate { 52147c478bd9Sstevel@tonic-gate int i; 52157c478bd9Sstevel@tonic-gate 52167c478bd9Sstevel@tonic-gate for (i = 1; i < 31; i++) { 52177c478bd9Sstevel@tonic-gate if (*value <= (1 << i)) 52187c478bd9Sstevel@tonic-gate break; 52197c478bd9Sstevel@tonic-gate } 52207c478bd9Sstevel@tonic-gate *value = (1 << i); 52217c478bd9Sstevel@tonic-gate } 52227c478bd9Sstevel@tonic-gate 52237c478bd9Sstevel@tonic-gate void 52247c478bd9Sstevel@tonic-gate ip_ire_init() 52257c478bd9Sstevel@tonic-gate { 52267c478bd9Sstevel@tonic-gate int i; 52277c478bd9Sstevel@tonic-gate 52287c478bd9Sstevel@tonic-gate mutex_init(&ire_ft_init_lock, NULL, MUTEX_DEFAULT, 0); 52297c478bd9Sstevel@tonic-gate mutex_init(&ire_handle_lock, NULL, MUTEX_DEFAULT, NULL); 52307c478bd9Sstevel@tonic-gate mutex_init(&ire_mrtun_lock, NULL, MUTEX_DEFAULT, NULL); 52317c478bd9Sstevel@tonic-gate mutex_init(&ire_srcif_table_lock, NULL, MUTEX_DEFAULT, NULL); 5232c793af95Ssangeeta mutex_init(&ndp4.ndp_g_lock, NULL, MUTEX_DEFAULT, NULL); 5233c793af95Ssangeeta 5234c793af95Ssangeeta rn_init(); 5235c793af95Ssangeeta (void) rn_inithead((void **)&ip_ftable, 32); 5236c793af95Ssangeeta /* 5237c793af95Ssangeeta * mark kernel ip ftable with RNF_SUNW_FT flag. 5238c793af95Ssangeeta */ 5239c793af95Ssangeeta ip_ftable->rnh_treetop->rn_flags |= RNF_SUNW_FT; 5240c793af95Ssangeeta rt_entry_cache = kmem_cache_create("rt_entry", 5241c793af95Ssangeeta sizeof (struct rt_entry), 0, NULL, NULL, NULL, NULL, NULL, 0); 52427c478bd9Sstevel@tonic-gate 52437c478bd9Sstevel@tonic-gate /* Calculate the IPv4 cache table size. */ 52447c478bd9Sstevel@tonic-gate ip_cache_table_size = MAX(ip_cache_table_size, 52457c478bd9Sstevel@tonic-gate ((kmem_avail() >> ip_ire_mem_ratio) / sizeof (ire_t) / 52467c478bd9Sstevel@tonic-gate ip_ire_max_bucket_cnt)); 52477c478bd9Sstevel@tonic-gate if (ip_cache_table_size > ip_max_cache_table_size) 52487c478bd9Sstevel@tonic-gate ip_cache_table_size = ip_max_cache_table_size; 52497c478bd9Sstevel@tonic-gate /* 52507c478bd9Sstevel@tonic-gate * Make sure that the table size is always a power of 2. The 52517c478bd9Sstevel@tonic-gate * hash macro IRE_ADDR_HASH() depends on that. 52527c478bd9Sstevel@tonic-gate */ 52537c478bd9Sstevel@tonic-gate power2_roundup(&ip_cache_table_size); 52547c478bd9Sstevel@tonic-gate 52557c478bd9Sstevel@tonic-gate ip_cache_table = (irb_t *)kmem_zalloc(ip_cache_table_size * 52567c478bd9Sstevel@tonic-gate sizeof (irb_t), KM_SLEEP); 52577c478bd9Sstevel@tonic-gate 52587c478bd9Sstevel@tonic-gate for (i = 0; i < ip_cache_table_size; i++) { 52597c478bd9Sstevel@tonic-gate rw_init(&ip_cache_table[i].irb_lock, NULL, 52607c478bd9Sstevel@tonic-gate RW_DEFAULT, NULL); 52617c478bd9Sstevel@tonic-gate } 52627c478bd9Sstevel@tonic-gate 52637c478bd9Sstevel@tonic-gate /* Calculate the IPv6 cache table size. */ 52647c478bd9Sstevel@tonic-gate ip6_cache_table_size = MAX(ip6_cache_table_size, 52657c478bd9Sstevel@tonic-gate ((kmem_avail() >> ip_ire_mem_ratio) / sizeof (ire_t) / 52667c478bd9Sstevel@tonic-gate ip6_ire_max_bucket_cnt)); 52677c478bd9Sstevel@tonic-gate if (ip6_cache_table_size > ip6_max_cache_table_size) 52687c478bd9Sstevel@tonic-gate ip6_cache_table_size = ip6_max_cache_table_size; 52697c478bd9Sstevel@tonic-gate /* 52707c478bd9Sstevel@tonic-gate * Make sure that the table size is always a power of 2. The 52717c478bd9Sstevel@tonic-gate * hash macro IRE_ADDR_HASH_V6() depends on that. 52727c478bd9Sstevel@tonic-gate */ 52737c478bd9Sstevel@tonic-gate power2_roundup(&ip6_cache_table_size); 52747c478bd9Sstevel@tonic-gate 52757c478bd9Sstevel@tonic-gate ip_cache_table_v6 = (irb_t *)kmem_zalloc(ip6_cache_table_size * 52767c478bd9Sstevel@tonic-gate sizeof (irb_t), KM_SLEEP); 52777c478bd9Sstevel@tonic-gate 52787c478bd9Sstevel@tonic-gate for (i = 0; i < ip6_cache_table_size; i++) { 52797c478bd9Sstevel@tonic-gate rw_init(&ip_cache_table_v6[i].irb_lock, NULL, 52807c478bd9Sstevel@tonic-gate RW_DEFAULT, NULL); 52817c478bd9Sstevel@tonic-gate } 52827c478bd9Sstevel@tonic-gate /* 52837c478bd9Sstevel@tonic-gate * Create ire caches, ire_reclaim() 52847c478bd9Sstevel@tonic-gate * will give IRE_CACHE back to system when needed. 52857c478bd9Sstevel@tonic-gate * This needs to be done here before anything else, since 52867c478bd9Sstevel@tonic-gate * ire_add() expects the cache to be created. 52877c478bd9Sstevel@tonic-gate */ 52887c478bd9Sstevel@tonic-gate ire_cache = kmem_cache_create("ire_cache", 52897c478bd9Sstevel@tonic-gate sizeof (ire_t), 0, ip_ire_constructor, 52907c478bd9Sstevel@tonic-gate ip_ire_destructor, ip_trash_ire_reclaim, NULL, NULL, 0); 52917c478bd9Sstevel@tonic-gate 52927c478bd9Sstevel@tonic-gate /* 52937c478bd9Sstevel@tonic-gate * Initialize ip_mrtun_table to NULL now, it will be 52947c478bd9Sstevel@tonic-gate * populated by ip_rt_add if reverse tunnel is created 52957c478bd9Sstevel@tonic-gate */ 52967c478bd9Sstevel@tonic-gate ip_mrtun_table = NULL; 52977c478bd9Sstevel@tonic-gate 52987c478bd9Sstevel@tonic-gate /* 52997c478bd9Sstevel@tonic-gate * Make sure that the forwarding table size is a power of 2. 53007c478bd9Sstevel@tonic-gate * The IRE*_ADDR_HASH() macroes depend on that. 53017c478bd9Sstevel@tonic-gate */ 53027c478bd9Sstevel@tonic-gate power2_roundup(&ip6_ftable_hash_size); 53037c478bd9Sstevel@tonic-gate } 53047c478bd9Sstevel@tonic-gate 53057c478bd9Sstevel@tonic-gate void 53067c478bd9Sstevel@tonic-gate ip_ire_fini() 53077c478bd9Sstevel@tonic-gate { 53087c478bd9Sstevel@tonic-gate int i; 53097c478bd9Sstevel@tonic-gate 53107c478bd9Sstevel@tonic-gate mutex_destroy(&ire_ft_init_lock); 53117c478bd9Sstevel@tonic-gate mutex_destroy(&ire_handle_lock); 5312c793af95Ssangeeta mutex_destroy(&ndp4.ndp_g_lock); 5313c793af95Ssangeeta 5314c793af95Ssangeeta rn_fini(); 5315c793af95Ssangeeta RADIX_NODE_HEAD_DESTROY(ip_ftable); 5316c793af95Ssangeeta kmem_cache_destroy(rt_entry_cache); 53177c478bd9Sstevel@tonic-gate 53187c478bd9Sstevel@tonic-gate for (i = 0; i < ip_cache_table_size; i++) { 53197c478bd9Sstevel@tonic-gate rw_destroy(&ip_cache_table[i].irb_lock); 53207c478bd9Sstevel@tonic-gate } 53217c478bd9Sstevel@tonic-gate kmem_free(ip_cache_table, ip_cache_table_size * sizeof (irb_t)); 53227c478bd9Sstevel@tonic-gate 53237c478bd9Sstevel@tonic-gate for (i = 0; i < ip6_cache_table_size; i++) { 53247c478bd9Sstevel@tonic-gate rw_destroy(&ip_cache_table_v6[i].irb_lock); 53257c478bd9Sstevel@tonic-gate } 53267c478bd9Sstevel@tonic-gate kmem_free(ip_cache_table_v6, ip6_cache_table_size * sizeof (irb_t)); 53277c478bd9Sstevel@tonic-gate 53287c478bd9Sstevel@tonic-gate if (ip_mrtun_table != NULL) { 53297c478bd9Sstevel@tonic-gate for (i = 0; i < IP_MRTUN_TABLE_SIZE; i++) { 53307c478bd9Sstevel@tonic-gate rw_destroy(&ip_mrtun_table[i].irb_lock); 53317c478bd9Sstevel@tonic-gate } 53327c478bd9Sstevel@tonic-gate kmem_free(ip_mrtun_table, IP_MRTUN_TABLE_SIZE * sizeof (irb_t)); 53337c478bd9Sstevel@tonic-gate } 53347c478bd9Sstevel@tonic-gate kmem_cache_destroy(ire_cache); 53357c478bd9Sstevel@tonic-gate } 53367c478bd9Sstevel@tonic-gate 53377c478bd9Sstevel@tonic-gate int 53387c478bd9Sstevel@tonic-gate ire_add_mrtun(ire_t **ire_p, queue_t *q, mblk_t *mp, ipsq_func_t func) 53397c478bd9Sstevel@tonic-gate { 53407c478bd9Sstevel@tonic-gate ire_t *ire1; 53417c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 53427c478bd9Sstevel@tonic-gate ire_t **irep; 53437c478bd9Sstevel@tonic-gate ire_t *ire; 53447c478bd9Sstevel@tonic-gate int i; 53457c478bd9Sstevel@tonic-gate uint_t max_frag; 53467c478bd9Sstevel@tonic-gate ill_t *stq_ill; 53477c478bd9Sstevel@tonic-gate int error; 53487c478bd9Sstevel@tonic-gate 53497c478bd9Sstevel@tonic-gate ire = *ire_p; 53507c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 53517c478bd9Sstevel@tonic-gate /* Is ip_mrtun_table empty ? */ 53527c478bd9Sstevel@tonic-gate 53537c478bd9Sstevel@tonic-gate if (ip_mrtun_table == NULL) { 53547c478bd9Sstevel@tonic-gate /* create the mrtun table */ 53557c478bd9Sstevel@tonic-gate mutex_enter(&ire_mrtun_lock); 53567c478bd9Sstevel@tonic-gate if (ip_mrtun_table == NULL) { 53577c478bd9Sstevel@tonic-gate ip_mrtun_table = 53587c478bd9Sstevel@tonic-gate (irb_t *)kmem_zalloc(IP_MRTUN_TABLE_SIZE * 53597c478bd9Sstevel@tonic-gate sizeof (irb_t), KM_NOSLEEP); 53607c478bd9Sstevel@tonic-gate 53617c478bd9Sstevel@tonic-gate if (ip_mrtun_table == NULL) { 53627c478bd9Sstevel@tonic-gate ip2dbg(("ire_add_mrtun: allocation failure\n")); 53637c478bd9Sstevel@tonic-gate mutex_exit(&ire_mrtun_lock); 53647c478bd9Sstevel@tonic-gate ire_refrele(ire); 53657c478bd9Sstevel@tonic-gate *ire_p = NULL; 53667c478bd9Sstevel@tonic-gate return (ENOMEM); 53677c478bd9Sstevel@tonic-gate } 53687c478bd9Sstevel@tonic-gate 53697c478bd9Sstevel@tonic-gate for (i = 0; i < IP_MRTUN_TABLE_SIZE; i++) { 53707c478bd9Sstevel@tonic-gate rw_init(&ip_mrtun_table[i].irb_lock, NULL, 53717c478bd9Sstevel@tonic-gate RW_DEFAULT, NULL); 53727c478bd9Sstevel@tonic-gate } 53737c478bd9Sstevel@tonic-gate ip2dbg(("ire_add_mrtun: mrtun table is created\n")); 53747c478bd9Sstevel@tonic-gate } 53757c478bd9Sstevel@tonic-gate /* some other thread got it and created the table */ 53767c478bd9Sstevel@tonic-gate mutex_exit(&ire_mrtun_lock); 53777c478bd9Sstevel@tonic-gate } 53787c478bd9Sstevel@tonic-gate 53797c478bd9Sstevel@tonic-gate /* 53807c478bd9Sstevel@tonic-gate * Check for duplicate in the bucket and insert in the table 53817c478bd9Sstevel@tonic-gate */ 53827c478bd9Sstevel@tonic-gate irb_ptr = &(ip_mrtun_table[IRE_ADDR_HASH(ire->ire_in_src_addr, 53837c478bd9Sstevel@tonic-gate IP_MRTUN_TABLE_SIZE)]); 53847c478bd9Sstevel@tonic-gate 53857c478bd9Sstevel@tonic-gate /* 53867c478bd9Sstevel@tonic-gate * Start the atomic add of the ire. Grab the ill locks, 53877c478bd9Sstevel@tonic-gate * ill_g_usesrc_lock and the bucket lock. 53887c478bd9Sstevel@tonic-gate * 53897c478bd9Sstevel@tonic-gate * If ipif or ill is changing ire_atomic_start() may queue the 53907c478bd9Sstevel@tonic-gate * request and return EINPROGRESS. 53917c478bd9Sstevel@tonic-gate */ 53927c478bd9Sstevel@tonic-gate error = ire_atomic_start(irb_ptr, ire, q, mp, func); 53937c478bd9Sstevel@tonic-gate if (error != 0) { 53947c478bd9Sstevel@tonic-gate /* 53957c478bd9Sstevel@tonic-gate * We don't know whether it is a valid ipif or not. 53967c478bd9Sstevel@tonic-gate * So, set it to NULL. This assumes that the ire has not added 53977c478bd9Sstevel@tonic-gate * a reference to the ipif. 53987c478bd9Sstevel@tonic-gate */ 53997c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 54007c478bd9Sstevel@tonic-gate ire_delete(ire); 54017c478bd9Sstevel@tonic-gate ip1dbg(("ire_add_mrtun: ire_atomic_start failed\n")); 54027c478bd9Sstevel@tonic-gate *ire_p = NULL; 54037c478bd9Sstevel@tonic-gate return (error); 54047c478bd9Sstevel@tonic-gate } 54057c478bd9Sstevel@tonic-gate for (ire1 = irb_ptr->irb_ire; ire1 != NULL; ire1 = ire1->ire_next) { 54067c478bd9Sstevel@tonic-gate if (ire1->ire_marks & IRE_MARK_CONDEMNED) 54077c478bd9Sstevel@tonic-gate continue; 54087c478bd9Sstevel@tonic-gate /* has anyone inserted the route in the meanwhile ? */ 54097c478bd9Sstevel@tonic-gate if (ire1->ire_in_ill == ire->ire_in_ill && 54107c478bd9Sstevel@tonic-gate ire1->ire_in_src_addr == ire->ire_in_src_addr) { 54117c478bd9Sstevel@tonic-gate ip1dbg(("ire_add_mrtun: Duplicate entry exists\n")); 54127c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire1); 54137c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 54147c478bd9Sstevel@tonic-gate ire_delete(ire); 54157c478bd9Sstevel@tonic-gate /* Return the old ire */ 54167c478bd9Sstevel@tonic-gate *ire_p = ire1; 54177c478bd9Sstevel@tonic-gate return (0); 54187c478bd9Sstevel@tonic-gate } 54197c478bd9Sstevel@tonic-gate } 54207c478bd9Sstevel@tonic-gate 54217c478bd9Sstevel@tonic-gate /* Atomically set the ire_max_frag */ 54227c478bd9Sstevel@tonic-gate max_frag = *ire->ire_max_fragp; 54237c478bd9Sstevel@tonic-gate ire->ire_max_fragp = NULL; 54247c478bd9Sstevel@tonic-gate ire->ire_max_frag = MIN(max_frag, IP_MAXPACKET); 5425c793af95Ssangeeta ASSERT(ire->ire_type != IRE_CACHE); 54267c478bd9Sstevel@tonic-gate irep = (ire_t **)irb_ptr; 54277c478bd9Sstevel@tonic-gate if (*irep != NULL) { 54287c478bd9Sstevel@tonic-gate /* Find the last ire which matches ire_in_src_addr */ 54297c478bd9Sstevel@tonic-gate ire1 = *irep; 54307c478bd9Sstevel@tonic-gate while (ire1->ire_in_src_addr == ire->ire_in_src_addr) { 54317c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 54327c478bd9Sstevel@tonic-gate ire1 = *irep; 54337c478bd9Sstevel@tonic-gate if (ire1 == NULL) 54347c478bd9Sstevel@tonic-gate break; 54357c478bd9Sstevel@tonic-gate } 54367c478bd9Sstevel@tonic-gate } 54377c478bd9Sstevel@tonic-gate ire1 = *irep; 54387c478bd9Sstevel@tonic-gate if (ire1 != NULL) 54397c478bd9Sstevel@tonic-gate ire1->ire_ptpn = &ire->ire_next; 54407c478bd9Sstevel@tonic-gate ire->ire_next = ire1; 54417c478bd9Sstevel@tonic-gate /* Link the new one in. */ 54427c478bd9Sstevel@tonic-gate ire->ire_ptpn = irep; 54437c478bd9Sstevel@tonic-gate membar_producer(); 54447c478bd9Sstevel@tonic-gate *irep = ire; 54457c478bd9Sstevel@tonic-gate ire->ire_bucket = irb_ptr; 54467c478bd9Sstevel@tonic-gate IRE_REFHOLD_LOCKED(ire); 54477c478bd9Sstevel@tonic-gate 54487c478bd9Sstevel@tonic-gate ip2dbg(("ire_add_mrtun: created and linked ire %p\n", (void *)*irep)); 54497c478bd9Sstevel@tonic-gate 54507c478bd9Sstevel@tonic-gate /* 54517c478bd9Sstevel@tonic-gate * Protect ire_mrtun_count and ill_mrtun_refcnt from 54527c478bd9Sstevel@tonic-gate * another thread trying to add ire in the table 54537c478bd9Sstevel@tonic-gate */ 54547c478bd9Sstevel@tonic-gate mutex_enter(&ire_mrtun_lock); 54557c478bd9Sstevel@tonic-gate ire_mrtun_count++; 54567c478bd9Sstevel@tonic-gate mutex_exit(&ire_mrtun_lock); 54577c478bd9Sstevel@tonic-gate /* 54587c478bd9Sstevel@tonic-gate * ill_mrtun_refcnt is protected by the ill_lock held via 54597c478bd9Sstevel@tonic-gate * ire_atomic_start 54607c478bd9Sstevel@tonic-gate */ 54617c478bd9Sstevel@tonic-gate ire->ire_in_ill->ill_mrtun_refcnt++; 54627c478bd9Sstevel@tonic-gate 54637c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) { 54647c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ire_cnt++; 54657c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) { 54667c478bd9Sstevel@tonic-gate stq_ill = (ill_t *)ire->ire_stq->q_ptr; 54677c478bd9Sstevel@tonic-gate stq_ill->ill_ire_cnt++; 54687c478bd9Sstevel@tonic-gate } 54697c478bd9Sstevel@tonic-gate } else { 54707c478bd9Sstevel@tonic-gate ASSERT(ire->ire_stq == NULL); 54717c478bd9Sstevel@tonic-gate } 54727c478bd9Sstevel@tonic-gate 54737c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 54747c478bd9Sstevel@tonic-gate ire_fastpath(ire); 54757c478bd9Sstevel@tonic-gate *ire_p = ire; 54767c478bd9Sstevel@tonic-gate return (0); 54777c478bd9Sstevel@tonic-gate } 54787c478bd9Sstevel@tonic-gate 54797c478bd9Sstevel@tonic-gate 54807c478bd9Sstevel@tonic-gate /* Walks down the mrtun table */ 54817c478bd9Sstevel@tonic-gate 54827c478bd9Sstevel@tonic-gate void 54837c478bd9Sstevel@tonic-gate ire_walk_ill_mrtun(uint_t match_flags, uint_t ire_type, pfv_t func, void *arg, 54847c478bd9Sstevel@tonic-gate ill_t *ill) 54857c478bd9Sstevel@tonic-gate { 54867c478bd9Sstevel@tonic-gate irb_t *irb; 54877c478bd9Sstevel@tonic-gate ire_t *ire; 54887c478bd9Sstevel@tonic-gate int i; 54897c478bd9Sstevel@tonic-gate int ret; 54907c478bd9Sstevel@tonic-gate 54917c478bd9Sstevel@tonic-gate ASSERT((!(match_flags & (MATCH_IRE_WQ | MATCH_IRE_ILL | 54927c478bd9Sstevel@tonic-gate MATCH_IRE_ILL_GROUP))) || (ill != NULL)); 54937c478bd9Sstevel@tonic-gate ASSERT(match_flags == 0 || ire_type == IRE_MIPRTUN); 54947c478bd9Sstevel@tonic-gate 54957c478bd9Sstevel@tonic-gate mutex_enter(&ire_mrtun_lock); 54967c478bd9Sstevel@tonic-gate if (ire_mrtun_count == 0) { 54977c478bd9Sstevel@tonic-gate mutex_exit(&ire_mrtun_lock); 54987c478bd9Sstevel@tonic-gate return; 54997c478bd9Sstevel@tonic-gate } 55007c478bd9Sstevel@tonic-gate mutex_exit(&ire_mrtun_lock); 55017c478bd9Sstevel@tonic-gate 55027c478bd9Sstevel@tonic-gate ip2dbg(("ire_walk_ill_mrtun:walking the reverse tunnel table \n")); 55037c478bd9Sstevel@tonic-gate for (i = 0; i < IP_MRTUN_TABLE_SIZE; i++) { 55047c478bd9Sstevel@tonic-gate 55057c478bd9Sstevel@tonic-gate irb = &(ip_mrtun_table[i]); 55067c478bd9Sstevel@tonic-gate if (irb->irb_ire == NULL) 55077c478bd9Sstevel@tonic-gate continue; 55087c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 55097c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; 55107c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 55117c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 55127c478bd9Sstevel@tonic-gate if (match_flags != 0) { 55137c478bd9Sstevel@tonic-gate ret = ire_walk_ill_match( 55147c478bd9Sstevel@tonic-gate match_flags, ire_type, 55157c478bd9Sstevel@tonic-gate ire, ill, ALL_ZONES); 55167c478bd9Sstevel@tonic-gate } 55177c478bd9Sstevel@tonic-gate if (match_flags == 0 || ret) 55187c478bd9Sstevel@tonic-gate (*func)(ire, arg); 55197c478bd9Sstevel@tonic-gate } 55207c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 55217c478bd9Sstevel@tonic-gate } 55227c478bd9Sstevel@tonic-gate } 55237c478bd9Sstevel@tonic-gate 55247c478bd9Sstevel@tonic-gate /* 55257c478bd9Sstevel@tonic-gate * Source interface based lookup routine (IPV4 only). 55267c478bd9Sstevel@tonic-gate * This routine is called only when RTA_SRCIFP bitflag is set 55277c478bd9Sstevel@tonic-gate * by routing socket while adding/deleting the route and it is 55287c478bd9Sstevel@tonic-gate * also called from ip_rput() when packets arrive from an interface 55297c478bd9Sstevel@tonic-gate * for which ill_srcif_ref_cnt is positive. This function is useful 55307c478bd9Sstevel@tonic-gate * when a packet coming from one interface must be forwarded to another 55317c478bd9Sstevel@tonic-gate * designated interface to reach the correct node. This function is also 55327c478bd9Sstevel@tonic-gate * called from ip_newroute when the link-layer address of an ire is resolved. 55337c478bd9Sstevel@tonic-gate * We need to make sure that ip_newroute searches for IRE_IF_RESOLVER type 55347c478bd9Sstevel@tonic-gate * ires--thus the ire_type parameter is needed. 55357c478bd9Sstevel@tonic-gate */ 55367c478bd9Sstevel@tonic-gate 55377c478bd9Sstevel@tonic-gate ire_t * 55387c478bd9Sstevel@tonic-gate ire_srcif_table_lookup(ipaddr_t dst_addr, int ire_type, ipif_t *ipif, 55397c478bd9Sstevel@tonic-gate ill_t *in_ill, int flags) 55407c478bd9Sstevel@tonic-gate { 55417c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 55427c478bd9Sstevel@tonic-gate ire_t *ire; 55437c478bd9Sstevel@tonic-gate irb_t *ire_srcif_table; 55447c478bd9Sstevel@tonic-gate 55457c478bd9Sstevel@tonic-gate ASSERT(in_ill != NULL && !in_ill->ill_isv6); 55467c478bd9Sstevel@tonic-gate ASSERT(!(flags & (MATCH_IRE_ILL|MATCH_IRE_ILL_GROUP)) || 55477c478bd9Sstevel@tonic-gate (ipif != NULL && !ipif->ipif_isv6)); 55487c478bd9Sstevel@tonic-gate 55497c478bd9Sstevel@tonic-gate /* 55507c478bd9Sstevel@tonic-gate * No need to lock the ill since it is refheld by the caller of this 55517c478bd9Sstevel@tonic-gate * function 55527c478bd9Sstevel@tonic-gate */ 55537c478bd9Sstevel@tonic-gate if (in_ill->ill_srcif_table == NULL) { 55547c478bd9Sstevel@tonic-gate return (NULL); 55557c478bd9Sstevel@tonic-gate } 55567c478bd9Sstevel@tonic-gate 55577c478bd9Sstevel@tonic-gate if (!(flags & MATCH_IRE_TYPE)) { 55587c478bd9Sstevel@tonic-gate flags |= MATCH_IRE_TYPE; 55597c478bd9Sstevel@tonic-gate ire_type = IRE_INTERFACE; 55607c478bd9Sstevel@tonic-gate } 55617c478bd9Sstevel@tonic-gate ire_srcif_table = in_ill->ill_srcif_table; 55627c478bd9Sstevel@tonic-gate irb_ptr = &ire_srcif_table[IRE_ADDR_HASH(dst_addr, 55637c478bd9Sstevel@tonic-gate IP_SRCIF_TABLE_SIZE)]; 55647c478bd9Sstevel@tonic-gate rw_enter(&irb_ptr->irb_lock, RW_READER); 55657c478bd9Sstevel@tonic-gate for (ire = irb_ptr->irb_ire; ire != NULL; ire = ire->ire_next) { 55667c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_CONDEMNED) 55677c478bd9Sstevel@tonic-gate continue; 55687c478bd9Sstevel@tonic-gate if (ire_match_args(ire, dst_addr, ire->ire_mask, 0, 556945916cd2Sjpk ire_type, ipif, ire->ire_zoneid, 0, NULL, flags)) { 55707c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 55717c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 55727c478bd9Sstevel@tonic-gate return (ire); 55737c478bd9Sstevel@tonic-gate } 55747c478bd9Sstevel@tonic-gate } 55757c478bd9Sstevel@tonic-gate /* Not Found */ 55767c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 55777c478bd9Sstevel@tonic-gate return (NULL); 55787c478bd9Sstevel@tonic-gate } 55797c478bd9Sstevel@tonic-gate 55807c478bd9Sstevel@tonic-gate 55817c478bd9Sstevel@tonic-gate /* 55827c478bd9Sstevel@tonic-gate * Adds the ire into the special routing table which is hanging off of 55837c478bd9Sstevel@tonic-gate * the src_ipif->ipif_ill. It also increments the refcnt in the ill. 55847c478bd9Sstevel@tonic-gate * The forward table contains only IRE_IF_RESOLVER, IRE_IF_NORESOLVER 55857c478bd9Sstevel@tonic-gate * i,e. IRE_INTERFACE entries. Originally the dlureq_mp field is NULL 55867c478bd9Sstevel@tonic-gate * for IRE_IF_RESOLVER entry because we do not have the dst_addr's 55877c478bd9Sstevel@tonic-gate * link-layer address at the time of addition. 55887c478bd9Sstevel@tonic-gate * Upon resolving the address from ARP, dlureq_mp field is updated with 55897c478bd9Sstevel@tonic-gate * proper information in ire_update_srcif_v4. 55907c478bd9Sstevel@tonic-gate */ 55917c478bd9Sstevel@tonic-gate static int 55927c478bd9Sstevel@tonic-gate ire_add_srcif_v4(ire_t **ire_p, queue_t *q, mblk_t *mp, ipsq_func_t func) 55937c478bd9Sstevel@tonic-gate { 55947c478bd9Sstevel@tonic-gate ire_t *ire1; 55957c478bd9Sstevel@tonic-gate irb_t *ire_srcifp_table = NULL; 55967c478bd9Sstevel@tonic-gate irb_t *irb_ptr = NULL; 55977c478bd9Sstevel@tonic-gate ire_t **irep; 55987c478bd9Sstevel@tonic-gate ire_t *ire; 55997c478bd9Sstevel@tonic-gate int flags; 56007c478bd9Sstevel@tonic-gate int i; 56017c478bd9Sstevel@tonic-gate ill_t *stq_ill; 56027c478bd9Sstevel@tonic-gate uint_t max_frag; 56037c478bd9Sstevel@tonic-gate int error = 0; 56047c478bd9Sstevel@tonic-gate 56057c478bd9Sstevel@tonic-gate ire = *ire_p; 56067c478bd9Sstevel@tonic-gate ASSERT(ire->ire_in_ill != NULL); 56077c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 56087c478bd9Sstevel@tonic-gate ASSERT(ire->ire_type == IRE_IF_NORESOLVER || 56097c478bd9Sstevel@tonic-gate ire->ire_type == IRE_IF_RESOLVER); 56107c478bd9Sstevel@tonic-gate 56117c478bd9Sstevel@tonic-gate ire->ire_mask = IP_HOST_MASK; 5612c793af95Ssangeeta /* 5613c793af95Ssangeeta * Update ire_nce->nce_res_mp with NULL value upon creation; 5614c793af95Ssangeeta * first free the default res_mp created by ire_nce_init. 5615c793af95Ssangeeta */ 5616c793af95Ssangeeta freeb(ire->ire_nce->nce_res_mp); 56177c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_IF_RESOLVER) { 56187c478bd9Sstevel@tonic-gate /* 56197c478bd9Sstevel@tonic-gate * assign NULL now, it will be updated 56207c478bd9Sstevel@tonic-gate * with correct value upon returning from 56217c478bd9Sstevel@tonic-gate * ARP 56227c478bd9Sstevel@tonic-gate */ 5623c793af95Ssangeeta ire->ire_nce->nce_res_mp = NULL; 56247c478bd9Sstevel@tonic-gate } else { 5625c793af95Ssangeeta ire->ire_nce->nce_res_mp = ill_dlur_gen(NULL, 56267c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ill->ill_phys_addr_length, 56277c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ill->ill_sap, 56287c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ill->ill_sap_length); 56297c478bd9Sstevel@tonic-gate } 56307c478bd9Sstevel@tonic-gate /* Make sure the address is properly masked. */ 56317c478bd9Sstevel@tonic-gate ire->ire_addr &= ire->ire_mask; 56327c478bd9Sstevel@tonic-gate 56337c478bd9Sstevel@tonic-gate ASSERT(ire->ire_max_fragp != NULL); 56347c478bd9Sstevel@tonic-gate max_frag = *ire->ire_max_fragp; 56357c478bd9Sstevel@tonic-gate ire->ire_max_fragp = NULL; 56367c478bd9Sstevel@tonic-gate ire->ire_max_frag = MIN(max_frag, IP_MAXPACKET); 56377c478bd9Sstevel@tonic-gate 56387c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_in_ill->ill_lock); 56397c478bd9Sstevel@tonic-gate if (ire->ire_in_ill->ill_srcif_table == NULL) { 56407c478bd9Sstevel@tonic-gate /* create the incoming interface based table */ 56417c478bd9Sstevel@tonic-gate ire->ire_in_ill->ill_srcif_table = 56427c478bd9Sstevel@tonic-gate (irb_t *)kmem_zalloc(IP_SRCIF_TABLE_SIZE * 56437c478bd9Sstevel@tonic-gate sizeof (irb_t), KM_NOSLEEP); 56447c478bd9Sstevel@tonic-gate if (ire->ire_in_ill->ill_srcif_table == NULL) { 56457c478bd9Sstevel@tonic-gate ip1dbg(("ire_add_srcif_v4: Allocation fail\n")); 56467c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_in_ill->ill_lock); 56477c478bd9Sstevel@tonic-gate ire_delete(ire); 56487c478bd9Sstevel@tonic-gate *ire_p = NULL; 56497c478bd9Sstevel@tonic-gate return (ENOMEM); 56507c478bd9Sstevel@tonic-gate } 56517c478bd9Sstevel@tonic-gate ire_srcifp_table = ire->ire_in_ill->ill_srcif_table; 56527c478bd9Sstevel@tonic-gate for (i = 0; i < IP_SRCIF_TABLE_SIZE; i++) { 56537c478bd9Sstevel@tonic-gate rw_init(&ire_srcifp_table[i].irb_lock, NULL, 56547c478bd9Sstevel@tonic-gate RW_DEFAULT, NULL); 56557c478bd9Sstevel@tonic-gate } 56567c478bd9Sstevel@tonic-gate ip2dbg(("ire_add_srcif_v4: table created for ill %p\n", 56577c478bd9Sstevel@tonic-gate (void *)ire->ire_in_ill)); 56587c478bd9Sstevel@tonic-gate } 56597c478bd9Sstevel@tonic-gate /* Check for duplicate and insert */ 56607c478bd9Sstevel@tonic-gate ASSERT(ire->ire_in_ill->ill_srcif_table != NULL); 56617c478bd9Sstevel@tonic-gate irb_ptr = 56627c478bd9Sstevel@tonic-gate &(ire->ire_in_ill->ill_srcif_table[IRE_ADDR_HASH(ire->ire_addr, 56637c478bd9Sstevel@tonic-gate IP_SRCIF_TABLE_SIZE)]); 56647c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_in_ill->ill_lock); 56657c478bd9Sstevel@tonic-gate flags = (MATCH_IRE_MASK | MATCH_IRE_TYPE | MATCH_IRE_GW); 56667c478bd9Sstevel@tonic-gate flags |= MATCH_IRE_IPIF; 56677c478bd9Sstevel@tonic-gate 56687c478bd9Sstevel@tonic-gate /* 56697c478bd9Sstevel@tonic-gate * Start the atomic add of the ire. Grab the ill locks, 56707c478bd9Sstevel@tonic-gate * ill_g_usesrc_lock and the bucket lock. 56717c478bd9Sstevel@tonic-gate * 56727c478bd9Sstevel@tonic-gate * If ipif or ill is changing ire_atomic_start() may queue the 56737c478bd9Sstevel@tonic-gate * request and return EINPROGRESS. 56747c478bd9Sstevel@tonic-gate */ 56757c478bd9Sstevel@tonic-gate error = ire_atomic_start(irb_ptr, ire, q, mp, func); 56767c478bd9Sstevel@tonic-gate if (error != 0) { 56777c478bd9Sstevel@tonic-gate /* 56787c478bd9Sstevel@tonic-gate * We don't know whether it is a valid ipif or not. 56797c478bd9Sstevel@tonic-gate * So, set it to NULL. This assumes that the ire has not added 56807c478bd9Sstevel@tonic-gate * a reference to the ipif. 56817c478bd9Sstevel@tonic-gate */ 56827c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 56837c478bd9Sstevel@tonic-gate ire_delete(ire); 56847c478bd9Sstevel@tonic-gate ip1dbg(("ire_add_srcif_v4: ire_atomic_start failed\n")); 56857c478bd9Sstevel@tonic-gate *ire_p = NULL; 56867c478bd9Sstevel@tonic-gate return (error); 56877c478bd9Sstevel@tonic-gate } 56887c478bd9Sstevel@tonic-gate for (ire1 = irb_ptr->irb_ire; ire1 != NULL; ire1 = ire1->ire_next) { 56897c478bd9Sstevel@tonic-gate if (ire1->ire_marks & IRE_MARK_CONDEMNED) 56907c478bd9Sstevel@tonic-gate continue; 56917c478bd9Sstevel@tonic-gate if (ire1->ire_zoneid != ire->ire_zoneid) 56927c478bd9Sstevel@tonic-gate continue; 56937c478bd9Sstevel@tonic-gate /* Has anyone inserted route in the meanwhile ? */ 56947c478bd9Sstevel@tonic-gate if (ire_match_args(ire1, ire->ire_addr, ire->ire_mask, 0, 569545916cd2Sjpk ire->ire_type, ire->ire_ipif, ire->ire_zoneid, 0, NULL, 569645916cd2Sjpk flags)) { 56977c478bd9Sstevel@tonic-gate ip1dbg(("ire_add_srcif_v4 : Duplicate entry exists\n")); 56987c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire1); 56997c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 57007c478bd9Sstevel@tonic-gate ire_delete(ire); 57017c478bd9Sstevel@tonic-gate /* Return old ire as in ire_add_v4 */ 57027c478bd9Sstevel@tonic-gate *ire_p = ire1; 57037c478bd9Sstevel@tonic-gate return (0); 57047c478bd9Sstevel@tonic-gate } 57057c478bd9Sstevel@tonic-gate } 57067c478bd9Sstevel@tonic-gate irep = (ire_t **)irb_ptr; 57077c478bd9Sstevel@tonic-gate if (*irep != NULL) { 57087c478bd9Sstevel@tonic-gate /* Find the last ire which matches ire_addr */ 57097c478bd9Sstevel@tonic-gate ire1 = *irep; 57107c478bd9Sstevel@tonic-gate while (ire1->ire_addr == ire->ire_addr) { 57117c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 57127c478bd9Sstevel@tonic-gate ire1 = *irep; 57137c478bd9Sstevel@tonic-gate if (ire1 == NULL) 57147c478bd9Sstevel@tonic-gate break; 57157c478bd9Sstevel@tonic-gate } 57167c478bd9Sstevel@tonic-gate } 57177c478bd9Sstevel@tonic-gate ire1 = *irep; 57187c478bd9Sstevel@tonic-gate if (ire1 != NULL) 57197c478bd9Sstevel@tonic-gate ire1->ire_ptpn = &ire->ire_next; 57207c478bd9Sstevel@tonic-gate ire->ire_next = ire1; 57217c478bd9Sstevel@tonic-gate /* Link the new one in. */ 57227c478bd9Sstevel@tonic-gate ire->ire_ptpn = irep; 57237c478bd9Sstevel@tonic-gate membar_producer(); 57247c478bd9Sstevel@tonic-gate *irep = ire; 57257c478bd9Sstevel@tonic-gate ire->ire_bucket = irb_ptr; 57267c478bd9Sstevel@tonic-gate IRE_REFHOLD_LOCKED(ire); 57277c478bd9Sstevel@tonic-gate 57287c478bd9Sstevel@tonic-gate /* 57297c478bd9Sstevel@tonic-gate * Protect ire_in_ill->ill_srcif_refcnt and table reference count. 57307c478bd9Sstevel@tonic-gate * Note, ire_atomic_start already grabs the ire_in_ill->ill_lock 57317c478bd9Sstevel@tonic-gate * so ill_srcif_refcnt is already protected. 57327c478bd9Sstevel@tonic-gate */ 57337c478bd9Sstevel@tonic-gate ire->ire_in_ill->ill_srcif_refcnt++; 57347c478bd9Sstevel@tonic-gate mutex_enter(&ire_srcif_table_lock); 57357c478bd9Sstevel@tonic-gate ire_srcif_table_count++; 57367c478bd9Sstevel@tonic-gate mutex_exit(&ire_srcif_table_lock); 57377c478bd9Sstevel@tonic-gate irb_ptr->irb_ire_cnt++; 57387c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) { 57397c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ire_cnt++; 57407c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) { 57417c478bd9Sstevel@tonic-gate stq_ill = (ill_t *)ire->ire_stq->q_ptr; 57427c478bd9Sstevel@tonic-gate stq_ill->ill_ire_cnt++; 57437c478bd9Sstevel@tonic-gate } 57447c478bd9Sstevel@tonic-gate } else { 57457c478bd9Sstevel@tonic-gate ASSERT(ire->ire_stq == NULL); 57467c478bd9Sstevel@tonic-gate } 57477c478bd9Sstevel@tonic-gate 57487c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 57497c478bd9Sstevel@tonic-gate *ire_p = ire; 57507c478bd9Sstevel@tonic-gate return (0); 57517c478bd9Sstevel@tonic-gate } 57527c478bd9Sstevel@tonic-gate 57537c478bd9Sstevel@tonic-gate 57547c478bd9Sstevel@tonic-gate /* 57557c478bd9Sstevel@tonic-gate * This function is called by ire_add_then_send when ARP request comes 57567c478bd9Sstevel@tonic-gate * back to ip_wput->ire_add_then_send for resolved ire in the interface 57577c478bd9Sstevel@tonic-gate * based routing table. At this point, it only needs to update the resolver 57587c478bd9Sstevel@tonic-gate * information for the ire. The passed ire is returned to the caller as it 57597c478bd9Sstevel@tonic-gate * is the ire which is created as mblk. 57607c478bd9Sstevel@tonic-gate */ 57617c478bd9Sstevel@tonic-gate 57627c478bd9Sstevel@tonic-gate static ire_t * 57637c478bd9Sstevel@tonic-gate ire_update_srcif_v4(ire_t *ire) 57647c478bd9Sstevel@tonic-gate { 57657c478bd9Sstevel@tonic-gate ire_t *ire1; 57667c478bd9Sstevel@tonic-gate irb_t *irb; 57677c478bd9Sstevel@tonic-gate int error; 57687c478bd9Sstevel@tonic-gate 57697c478bd9Sstevel@tonic-gate ASSERT(ire->ire_type != IRE_MIPRTUN && 57707c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_net_type == IRE_IF_RESOLVER); 57717c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 57727c478bd9Sstevel@tonic-gate 57737c478bd9Sstevel@tonic-gate /* 57747c478bd9Sstevel@tonic-gate * This ire is from ARP. Update 5775c793af95Ssangeeta * ire_nce->nce_res_mp info 57767c478bd9Sstevel@tonic-gate */ 57777c478bd9Sstevel@tonic-gate ire1 = ire_srcif_table_lookup(ire->ire_addr, 57787c478bd9Sstevel@tonic-gate IRE_IF_RESOLVER, ire->ire_ipif, 57797c478bd9Sstevel@tonic-gate ire->ire_in_ill, 57807c478bd9Sstevel@tonic-gate MATCH_IRE_ILL | MATCH_IRE_TYPE); 57817c478bd9Sstevel@tonic-gate if (ire1 == NULL) { 57827c478bd9Sstevel@tonic-gate /* Mobile node registration expired ? */ 57837c478bd9Sstevel@tonic-gate ire_delete(ire); 57847c478bd9Sstevel@tonic-gate return (NULL); 57857c478bd9Sstevel@tonic-gate } 57867c478bd9Sstevel@tonic-gate irb = ire1->ire_bucket; 57877c478bd9Sstevel@tonic-gate ASSERT(irb != NULL); 57887c478bd9Sstevel@tonic-gate /* 57897c478bd9Sstevel@tonic-gate * Start the atomic add of the ire. Grab the ill locks, 57907c478bd9Sstevel@tonic-gate * ill_g_usesrc_lock and the bucket lock. 57917c478bd9Sstevel@tonic-gate */ 57927c478bd9Sstevel@tonic-gate error = ire_atomic_start(irb, ire1, NULL, NULL, NULL); 57937c478bd9Sstevel@tonic-gate if (error != 0) { 57947c478bd9Sstevel@tonic-gate /* 57957c478bd9Sstevel@tonic-gate * We don't know whether it is a valid ipif or not. 57967c478bd9Sstevel@tonic-gate * So, set it to NULL. This assumes that the ire has not added 57977c478bd9Sstevel@tonic-gate * a reference to the ipif. 57987c478bd9Sstevel@tonic-gate */ 57997c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 58007c478bd9Sstevel@tonic-gate ire_delete(ire); 58017c478bd9Sstevel@tonic-gate ip1dbg(("ire_update_srcif_v4: ire_atomic_start failed\n")); 58027c478bd9Sstevel@tonic-gate return (NULL); 58037c478bd9Sstevel@tonic-gate } 58047c478bd9Sstevel@tonic-gate ASSERT(ire->ire_max_fragp == NULL); 58057c478bd9Sstevel@tonic-gate ire->ire_max_frag = ire1->ire_max_frag; 58067c478bd9Sstevel@tonic-gate /* 58077c478bd9Sstevel@tonic-gate * Update resolver information and 58087c478bd9Sstevel@tonic-gate * send-to queue. 58097c478bd9Sstevel@tonic-gate */ 5810c793af95Ssangeeta ASSERT(ire->ire_nce->nce_res_mp != NULL); 5811c793af95Ssangeeta ire1->ire_nce->nce_res_mp = copyb(ire->ire_nce->nce_res_mp); 5812c793af95Ssangeeta if (ire1->ire_nce->nce_res_mp == NULL) { 58137c478bd9Sstevel@tonic-gate ip0dbg(("ire_update_srcif: copyb failed\n")); 58147c478bd9Sstevel@tonic-gate ire_refrele(ire1); 58157c478bd9Sstevel@tonic-gate ire_refrele(ire); 58167c478bd9Sstevel@tonic-gate ire_atomic_end(irb, ire1); 58177c478bd9Sstevel@tonic-gate return (NULL); 58187c478bd9Sstevel@tonic-gate } 58197c478bd9Sstevel@tonic-gate ire1->ire_stq = ire->ire_stq; 58207c478bd9Sstevel@tonic-gate 5821c793af95Ssangeeta ASSERT(ire->ire_nce->nce_fp_mp == NULL); 58227c478bd9Sstevel@tonic-gate 58237c478bd9Sstevel@tonic-gate ire_atomic_end(irb, ire1); 58247c478bd9Sstevel@tonic-gate ire_refrele(ire1); 58257c478bd9Sstevel@tonic-gate /* Return the passed ire */ 58267c478bd9Sstevel@tonic-gate return (ire); /* Update done */ 58277c478bd9Sstevel@tonic-gate } 58287c478bd9Sstevel@tonic-gate 58297c478bd9Sstevel@tonic-gate 58307c478bd9Sstevel@tonic-gate /* 58317c478bd9Sstevel@tonic-gate * Check if another multirt route resolution is needed. 58327c478bd9Sstevel@tonic-gate * B_TRUE is returned is there remain a resolvable route, 58337c478bd9Sstevel@tonic-gate * or if no route for that dst is resolved yet. 58347c478bd9Sstevel@tonic-gate * B_FALSE is returned if all routes for that dst are resolved 58357c478bd9Sstevel@tonic-gate * or if the remaining unresolved routes are actually not 58367c478bd9Sstevel@tonic-gate * resolvable. 58377c478bd9Sstevel@tonic-gate * This only works in the global zone. 58387c478bd9Sstevel@tonic-gate */ 58397c478bd9Sstevel@tonic-gate boolean_t 584045916cd2Sjpk ire_multirt_need_resolve(ipaddr_t dst, const ts_label_t *tsl) 58417c478bd9Sstevel@tonic-gate { 58427c478bd9Sstevel@tonic-gate ire_t *first_fire; 58437c478bd9Sstevel@tonic-gate ire_t *first_cire; 58447c478bd9Sstevel@tonic-gate ire_t *fire; 58457c478bd9Sstevel@tonic-gate ire_t *cire; 58467c478bd9Sstevel@tonic-gate irb_t *firb; 58477c478bd9Sstevel@tonic-gate irb_t *cirb; 58487c478bd9Sstevel@tonic-gate int unres_cnt = 0; 58497c478bd9Sstevel@tonic-gate boolean_t resolvable = B_FALSE; 58507c478bd9Sstevel@tonic-gate 58517c478bd9Sstevel@tonic-gate /* Retrieve the first IRE_HOST that matches the destination */ 58527c478bd9Sstevel@tonic-gate first_fire = ire_ftable_lookup(dst, IP_HOST_MASK, 0, IRE_HOST, NULL, 585345916cd2Sjpk NULL, ALL_ZONES, 0, tsl, 585445916cd2Sjpk MATCH_IRE_MASK | MATCH_IRE_TYPE | MATCH_IRE_SECATTR); 58557c478bd9Sstevel@tonic-gate 58567c478bd9Sstevel@tonic-gate /* No route at all */ 58577c478bd9Sstevel@tonic-gate if (first_fire == NULL) { 58587c478bd9Sstevel@tonic-gate return (B_TRUE); 58597c478bd9Sstevel@tonic-gate } 58607c478bd9Sstevel@tonic-gate 58617c478bd9Sstevel@tonic-gate firb = first_fire->ire_bucket; 58627c478bd9Sstevel@tonic-gate ASSERT(firb != NULL); 58637c478bd9Sstevel@tonic-gate 58647c478bd9Sstevel@tonic-gate /* Retrieve the first IRE_CACHE ire for that destination. */ 586545916cd2Sjpk first_cire = ire_cache_lookup(dst, GLOBAL_ZONEID, tsl); 58667c478bd9Sstevel@tonic-gate 58677c478bd9Sstevel@tonic-gate /* No resolved route. */ 58687c478bd9Sstevel@tonic-gate if (first_cire == NULL) { 58697c478bd9Sstevel@tonic-gate ire_refrele(first_fire); 58707c478bd9Sstevel@tonic-gate return (B_TRUE); 58717c478bd9Sstevel@tonic-gate } 58727c478bd9Sstevel@tonic-gate 58737c478bd9Sstevel@tonic-gate /* 58747c478bd9Sstevel@tonic-gate * At least one route is resolved. Here we look through the forward 58757c478bd9Sstevel@tonic-gate * and cache tables, to compare the number of declared routes 58767c478bd9Sstevel@tonic-gate * with the number of resolved routes. The search for a resolvable 58777c478bd9Sstevel@tonic-gate * route is performed only if at least one route remains 58787c478bd9Sstevel@tonic-gate * unresolved. 58797c478bd9Sstevel@tonic-gate */ 58807c478bd9Sstevel@tonic-gate cirb = first_cire->ire_bucket; 58817c478bd9Sstevel@tonic-gate ASSERT(cirb != NULL); 58827c478bd9Sstevel@tonic-gate 58837c478bd9Sstevel@tonic-gate /* Count the number of routes to that dest that are declared. */ 58847c478bd9Sstevel@tonic-gate IRB_REFHOLD(firb); 58857c478bd9Sstevel@tonic-gate for (fire = first_fire; fire != NULL; fire = fire->ire_next) { 58867c478bd9Sstevel@tonic-gate if (!(fire->ire_flags & RTF_MULTIRT)) 58877c478bd9Sstevel@tonic-gate continue; 58887c478bd9Sstevel@tonic-gate if (fire->ire_addr != dst) 58897c478bd9Sstevel@tonic-gate continue; 58907c478bd9Sstevel@tonic-gate unres_cnt++; 58917c478bd9Sstevel@tonic-gate } 58927c478bd9Sstevel@tonic-gate IRB_REFRELE(firb); 58937c478bd9Sstevel@tonic-gate 58947c478bd9Sstevel@tonic-gate /* Then subtract the number of routes to that dst that are resolved */ 58957c478bd9Sstevel@tonic-gate IRB_REFHOLD(cirb); 58967c478bd9Sstevel@tonic-gate for (cire = first_cire; cire != NULL; cire = cire->ire_next) { 58977c478bd9Sstevel@tonic-gate if (!(cire->ire_flags & RTF_MULTIRT)) 58987c478bd9Sstevel@tonic-gate continue; 58997c478bd9Sstevel@tonic-gate if (cire->ire_addr != dst) 59007c478bd9Sstevel@tonic-gate continue; 59017c478bd9Sstevel@tonic-gate if (cire->ire_marks & (IRE_MARK_CONDEMNED | IRE_MARK_HIDDEN)) 59027c478bd9Sstevel@tonic-gate continue; 59037c478bd9Sstevel@tonic-gate unres_cnt--; 59047c478bd9Sstevel@tonic-gate } 59057c478bd9Sstevel@tonic-gate IRB_REFRELE(cirb); 59067c478bd9Sstevel@tonic-gate 59077c478bd9Sstevel@tonic-gate /* At least one route is unresolved; search for a resolvable route. */ 59087c478bd9Sstevel@tonic-gate if (unres_cnt > 0) 59097c478bd9Sstevel@tonic-gate resolvable = ire_multirt_lookup(&first_cire, &first_fire, 591045916cd2Sjpk MULTIRT_USESTAMP | MULTIRT_CACHEGW, tsl); 59117c478bd9Sstevel@tonic-gate 59127c478bd9Sstevel@tonic-gate if (first_fire != NULL) 59137c478bd9Sstevel@tonic-gate ire_refrele(first_fire); 59147c478bd9Sstevel@tonic-gate 59157c478bd9Sstevel@tonic-gate if (first_cire != NULL) 59167c478bd9Sstevel@tonic-gate ire_refrele(first_cire); 59177c478bd9Sstevel@tonic-gate 59187c478bd9Sstevel@tonic-gate return (resolvable); 59197c478bd9Sstevel@tonic-gate } 59207c478bd9Sstevel@tonic-gate 59217c478bd9Sstevel@tonic-gate 59227c478bd9Sstevel@tonic-gate /* 59237c478bd9Sstevel@tonic-gate * Explore a forward_table bucket, starting from fire_arg. 59247c478bd9Sstevel@tonic-gate * fire_arg MUST be an IRE_HOST entry. 59257c478bd9Sstevel@tonic-gate * 59267c478bd9Sstevel@tonic-gate * Return B_TRUE and update *ire_arg and *fire_arg 59277c478bd9Sstevel@tonic-gate * if at least one resolvable route is found. *ire_arg 59287c478bd9Sstevel@tonic-gate * is the IRE entry for *fire_arg's gateway. 59297c478bd9Sstevel@tonic-gate * 59307c478bd9Sstevel@tonic-gate * Return B_FALSE otherwise (all routes are resolved or 59317c478bd9Sstevel@tonic-gate * the remaining unresolved routes are all unresolvable). 59327c478bd9Sstevel@tonic-gate * 59337c478bd9Sstevel@tonic-gate * The IRE selection relies on a priority mechanism 59347c478bd9Sstevel@tonic-gate * driven by the flags passed in by the caller. 59357c478bd9Sstevel@tonic-gate * The caller, such as ip_newroute_ipif(), can get the most 59367c478bd9Sstevel@tonic-gate * relevant ire at each stage of a multiple route resolution. 59377c478bd9Sstevel@tonic-gate * 59387c478bd9Sstevel@tonic-gate * The rules are: 59397c478bd9Sstevel@tonic-gate * 59407c478bd9Sstevel@tonic-gate * - if MULTIRT_CACHEGW is specified in flags, IRE_CACHETABLE 59417c478bd9Sstevel@tonic-gate * ires are preferred for the gateway. This gives the highest 59427c478bd9Sstevel@tonic-gate * priority to routes that can be resolved without using 59437c478bd9Sstevel@tonic-gate * a resolver. 59447c478bd9Sstevel@tonic-gate * 59457c478bd9Sstevel@tonic-gate * - if MULTIRT_CACHEGW is not specified, or if MULTIRT_CACHEGW 59467c478bd9Sstevel@tonic-gate * is specified but no IRE_CACHETABLE ire entry for the gateway 59477c478bd9Sstevel@tonic-gate * is found, the following rules apply. 59487c478bd9Sstevel@tonic-gate * 59497c478bd9Sstevel@tonic-gate * - if MULTIRT_USESTAMP is specified in flags, IRE_INTERFACE 59507c478bd9Sstevel@tonic-gate * ires for the gateway, that have not been tried since 59517c478bd9Sstevel@tonic-gate * a configurable amount of time, are preferred. 59527c478bd9Sstevel@tonic-gate * This applies when a resolver must be invoked for 59537c478bd9Sstevel@tonic-gate * a missing route, but we don't want to use the resolver 59547c478bd9Sstevel@tonic-gate * upon each packet emission. If no such resolver is found, 59557c478bd9Sstevel@tonic-gate * B_FALSE is returned. 59567c478bd9Sstevel@tonic-gate * The MULTIRT_USESTAMP flag can be combined with 59577c478bd9Sstevel@tonic-gate * MULTIRT_CACHEGW. 59587c478bd9Sstevel@tonic-gate * 59597c478bd9Sstevel@tonic-gate * - if MULTIRT_USESTAMP is not specified in flags, the first 59607c478bd9Sstevel@tonic-gate * unresolved but resolvable route is selected. 59617c478bd9Sstevel@tonic-gate * 59627c478bd9Sstevel@tonic-gate * - Otherwise, there is no resolvalble route, and 59637c478bd9Sstevel@tonic-gate * B_FALSE is returned. 59647c478bd9Sstevel@tonic-gate * 59657c478bd9Sstevel@tonic-gate * At last, MULTIRT_SETSTAMP can be specified in flags to 59667c478bd9Sstevel@tonic-gate * request the timestamp of unresolvable routes to 59677c478bd9Sstevel@tonic-gate * be refreshed. This prevents the useless exploration 59687c478bd9Sstevel@tonic-gate * of those routes for a while, when MULTIRT_USESTAMP is used. 59697c478bd9Sstevel@tonic-gate * 59707c478bd9Sstevel@tonic-gate * This only works in the global zone. 59717c478bd9Sstevel@tonic-gate */ 59727c478bd9Sstevel@tonic-gate boolean_t 597345916cd2Sjpk ire_multirt_lookup(ire_t **ire_arg, ire_t **fire_arg, uint32_t flags, 597445916cd2Sjpk const ts_label_t *tsl) 59757c478bd9Sstevel@tonic-gate { 59767c478bd9Sstevel@tonic-gate clock_t delta; 59777c478bd9Sstevel@tonic-gate ire_t *best_fire = NULL; 59787c478bd9Sstevel@tonic-gate ire_t *best_cire = NULL; 59797c478bd9Sstevel@tonic-gate ire_t *first_fire; 59807c478bd9Sstevel@tonic-gate ire_t *first_cire; 59817c478bd9Sstevel@tonic-gate ire_t *fire; 59827c478bd9Sstevel@tonic-gate ire_t *cire; 59837c478bd9Sstevel@tonic-gate irb_t *firb = NULL; 59847c478bd9Sstevel@tonic-gate irb_t *cirb = NULL; 59857c478bd9Sstevel@tonic-gate ire_t *gw_ire; 59867c478bd9Sstevel@tonic-gate boolean_t already_resolved; 59877c478bd9Sstevel@tonic-gate boolean_t res; 59887c478bd9Sstevel@tonic-gate ipaddr_t dst; 59897c478bd9Sstevel@tonic-gate ipaddr_t gw; 59907c478bd9Sstevel@tonic-gate 59917c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: *ire_arg %p, *fire_arg %p, flags %04x\n", 59927c478bd9Sstevel@tonic-gate (void *)*ire_arg, (void *)*fire_arg, flags)); 59937c478bd9Sstevel@tonic-gate 59947c478bd9Sstevel@tonic-gate ASSERT(ire_arg != NULL); 59957c478bd9Sstevel@tonic-gate ASSERT(fire_arg != NULL); 59967c478bd9Sstevel@tonic-gate 59977c478bd9Sstevel@tonic-gate /* Not an IRE_HOST ire; give up. */ 59987c478bd9Sstevel@tonic-gate if ((*fire_arg == NULL) || ((*fire_arg)->ire_type != IRE_HOST)) { 59997c478bd9Sstevel@tonic-gate return (B_FALSE); 60007c478bd9Sstevel@tonic-gate } 60017c478bd9Sstevel@tonic-gate 60027c478bd9Sstevel@tonic-gate /* This is the first IRE_HOST ire for that destination. */ 60037c478bd9Sstevel@tonic-gate first_fire = *fire_arg; 60047c478bd9Sstevel@tonic-gate firb = first_fire->ire_bucket; 60057c478bd9Sstevel@tonic-gate ASSERT(firb != NULL); 60067c478bd9Sstevel@tonic-gate 60077c478bd9Sstevel@tonic-gate dst = first_fire->ire_addr; 60087c478bd9Sstevel@tonic-gate 60097c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: dst %08x\n", ntohl(dst))); 60107c478bd9Sstevel@tonic-gate 60117c478bd9Sstevel@tonic-gate /* 60127c478bd9Sstevel@tonic-gate * Retrieve the first IRE_CACHE ire for that destination; 60137c478bd9Sstevel@tonic-gate * if we don't find one, no route for that dest is 60147c478bd9Sstevel@tonic-gate * resolved yet. 60157c478bd9Sstevel@tonic-gate */ 601645916cd2Sjpk first_cire = ire_cache_lookup(dst, GLOBAL_ZONEID, tsl); 60177c478bd9Sstevel@tonic-gate if (first_cire != NULL) { 60187c478bd9Sstevel@tonic-gate cirb = first_cire->ire_bucket; 60197c478bd9Sstevel@tonic-gate } 60207c478bd9Sstevel@tonic-gate 60217c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: first_cire %p\n", (void *)first_cire)); 60227c478bd9Sstevel@tonic-gate 60237c478bd9Sstevel@tonic-gate /* 60247c478bd9Sstevel@tonic-gate * Search for a resolvable route, giving the top priority 60257c478bd9Sstevel@tonic-gate * to routes that can be resolved without any call to the resolver. 60267c478bd9Sstevel@tonic-gate */ 60277c478bd9Sstevel@tonic-gate IRB_REFHOLD(firb); 60287c478bd9Sstevel@tonic-gate 60297c478bd9Sstevel@tonic-gate if (!CLASSD(dst)) { 60307c478bd9Sstevel@tonic-gate /* 60317c478bd9Sstevel@tonic-gate * For all multiroute IRE_HOST ires for that destination, 60327c478bd9Sstevel@tonic-gate * check if the route via the IRE_HOST's gateway is 60337c478bd9Sstevel@tonic-gate * resolved yet. 60347c478bd9Sstevel@tonic-gate */ 60357c478bd9Sstevel@tonic-gate for (fire = first_fire; fire != NULL; fire = fire->ire_next) { 60367c478bd9Sstevel@tonic-gate 60377c478bd9Sstevel@tonic-gate if (!(fire->ire_flags & RTF_MULTIRT)) 60387c478bd9Sstevel@tonic-gate continue; 60397c478bd9Sstevel@tonic-gate if (fire->ire_addr != dst) 60407c478bd9Sstevel@tonic-gate continue; 60417c478bd9Sstevel@tonic-gate 604245916cd2Sjpk if (fire->ire_gw_secattr != NULL && 604345916cd2Sjpk tsol_ire_match_gwattr(fire, tsl) != 0) { 604445916cd2Sjpk continue; 604545916cd2Sjpk } 604645916cd2Sjpk 60477c478bd9Sstevel@tonic-gate gw = fire->ire_gateway_addr; 60487c478bd9Sstevel@tonic-gate 60497c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: fire %p, " 60507c478bd9Sstevel@tonic-gate "ire_addr %08x, ire_gateway_addr %08x\n", 60517c478bd9Sstevel@tonic-gate (void *)fire, ntohl(fire->ire_addr), ntohl(gw))); 60527c478bd9Sstevel@tonic-gate 60537c478bd9Sstevel@tonic-gate already_resolved = B_FALSE; 60547c478bd9Sstevel@tonic-gate 60557c478bd9Sstevel@tonic-gate if (first_cire != NULL) { 60567c478bd9Sstevel@tonic-gate ASSERT(cirb != NULL); 60577c478bd9Sstevel@tonic-gate 60587c478bd9Sstevel@tonic-gate IRB_REFHOLD(cirb); 60597c478bd9Sstevel@tonic-gate /* 60607c478bd9Sstevel@tonic-gate * For all IRE_CACHE ires for that 60617c478bd9Sstevel@tonic-gate * destination. 60627c478bd9Sstevel@tonic-gate */ 60637c478bd9Sstevel@tonic-gate for (cire = first_cire; 60647c478bd9Sstevel@tonic-gate cire != NULL; 60657c478bd9Sstevel@tonic-gate cire = cire->ire_next) { 60667c478bd9Sstevel@tonic-gate 60677c478bd9Sstevel@tonic-gate if (!(cire->ire_flags & RTF_MULTIRT)) 60687c478bd9Sstevel@tonic-gate continue; 60697c478bd9Sstevel@tonic-gate if (cire->ire_addr != dst) 60707c478bd9Sstevel@tonic-gate continue; 60717c478bd9Sstevel@tonic-gate if (cire->ire_marks & 60727c478bd9Sstevel@tonic-gate (IRE_MARK_CONDEMNED | 60737c478bd9Sstevel@tonic-gate IRE_MARK_HIDDEN)) 60747c478bd9Sstevel@tonic-gate continue; 607545916cd2Sjpk 607645916cd2Sjpk if (cire->ire_gw_secattr != NULL && 607745916cd2Sjpk tsol_ire_match_gwattr(cire, 607845916cd2Sjpk tsl) != 0) { 607945916cd2Sjpk continue; 608045916cd2Sjpk } 608145916cd2Sjpk 60827c478bd9Sstevel@tonic-gate /* 60837c478bd9Sstevel@tonic-gate * Check if the IRE_CACHE's gateway 60847c478bd9Sstevel@tonic-gate * matches the IRE_HOST's gateway. 60857c478bd9Sstevel@tonic-gate */ 60867c478bd9Sstevel@tonic-gate if (cire->ire_gateway_addr == gw) { 60877c478bd9Sstevel@tonic-gate already_resolved = B_TRUE; 60887c478bd9Sstevel@tonic-gate break; 60897c478bd9Sstevel@tonic-gate } 60907c478bd9Sstevel@tonic-gate } 60917c478bd9Sstevel@tonic-gate IRB_REFRELE(cirb); 60927c478bd9Sstevel@tonic-gate } 60937c478bd9Sstevel@tonic-gate 60947c478bd9Sstevel@tonic-gate /* 60957c478bd9Sstevel@tonic-gate * This route is already resolved; 60967c478bd9Sstevel@tonic-gate * proceed with next one. 60977c478bd9Sstevel@tonic-gate */ 60987c478bd9Sstevel@tonic-gate if (already_resolved) { 60997c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: found cire %p, " 61007c478bd9Sstevel@tonic-gate "already resolved\n", (void *)cire)); 61017c478bd9Sstevel@tonic-gate continue; 61027c478bd9Sstevel@tonic-gate } 61037c478bd9Sstevel@tonic-gate 61047c478bd9Sstevel@tonic-gate /* 61057c478bd9Sstevel@tonic-gate * The route is unresolved; is it actually 61067c478bd9Sstevel@tonic-gate * resolvable, i.e. is there a cache or a resolver 61077c478bd9Sstevel@tonic-gate * for the gateway? 61087c478bd9Sstevel@tonic-gate */ 61097c478bd9Sstevel@tonic-gate gw_ire = ire_route_lookup(gw, 0, 0, 0, NULL, NULL, 611045916cd2Sjpk ALL_ZONES, tsl, 611145916cd2Sjpk MATCH_IRE_RECURSIVE | MATCH_IRE_SECATTR); 61127c478bd9Sstevel@tonic-gate 61137c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: looked up gw_ire %p\n", 61147c478bd9Sstevel@tonic-gate (void *)gw_ire)); 61157c478bd9Sstevel@tonic-gate 61167c478bd9Sstevel@tonic-gate /* 61177c478bd9Sstevel@tonic-gate * If gw_ire is typed IRE_CACHETABLE, 61187c478bd9Sstevel@tonic-gate * this route can be resolved without any call to the 61197c478bd9Sstevel@tonic-gate * resolver. If the MULTIRT_CACHEGW flag is set, 61207c478bd9Sstevel@tonic-gate * give the top priority to this ire and exit the 61217c478bd9Sstevel@tonic-gate * loop. 61227c478bd9Sstevel@tonic-gate * This is typically the case when an ARP reply 61237c478bd9Sstevel@tonic-gate * is processed through ip_wput_nondata(). 61247c478bd9Sstevel@tonic-gate */ 61257c478bd9Sstevel@tonic-gate if ((flags & MULTIRT_CACHEGW) && 61267c478bd9Sstevel@tonic-gate (gw_ire != NULL) && 61277c478bd9Sstevel@tonic-gate (gw_ire->ire_type & IRE_CACHETABLE)) { 6128c793af95Ssangeeta ASSERT(gw_ire->ire_nce == NULL || 6129c793af95Ssangeeta gw_ire->ire_nce->nce_state == ND_REACHABLE); 61307c478bd9Sstevel@tonic-gate /* 61317c478bd9Sstevel@tonic-gate * Release the resolver associated to the 61327c478bd9Sstevel@tonic-gate * previous candidate best ire, if any. 61337c478bd9Sstevel@tonic-gate */ 61347c478bd9Sstevel@tonic-gate if (best_cire != NULL) { 61357c478bd9Sstevel@tonic-gate ire_refrele(best_cire); 61367c478bd9Sstevel@tonic-gate ASSERT(best_fire != NULL); 61377c478bd9Sstevel@tonic-gate } 61387c478bd9Sstevel@tonic-gate 61397c478bd9Sstevel@tonic-gate best_fire = fire; 61407c478bd9Sstevel@tonic-gate best_cire = gw_ire; 61417c478bd9Sstevel@tonic-gate 61427c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: found top prio " 61437c478bd9Sstevel@tonic-gate "best_fire %p, best_cire %p\n", 61447c478bd9Sstevel@tonic-gate (void *)best_fire, (void *)best_cire)); 61457c478bd9Sstevel@tonic-gate break; 61467c478bd9Sstevel@tonic-gate } 61477c478bd9Sstevel@tonic-gate 61487c478bd9Sstevel@tonic-gate /* 61497c478bd9Sstevel@tonic-gate * Compute the time elapsed since our preceding 61507c478bd9Sstevel@tonic-gate * attempt to resolve that route. 61517c478bd9Sstevel@tonic-gate * If the MULTIRT_USESTAMP flag is set, we take that 61527c478bd9Sstevel@tonic-gate * route into account only if this time interval 61537c478bd9Sstevel@tonic-gate * exceeds ip_multirt_resolution_interval; 61547c478bd9Sstevel@tonic-gate * this prevents us from attempting to resolve a 61557c478bd9Sstevel@tonic-gate * broken route upon each sending of a packet. 61567c478bd9Sstevel@tonic-gate */ 61577c478bd9Sstevel@tonic-gate delta = lbolt - fire->ire_last_used_time; 61587c478bd9Sstevel@tonic-gate delta = TICK_TO_MSEC(delta); 61597c478bd9Sstevel@tonic-gate 61607c478bd9Sstevel@tonic-gate res = (boolean_t) 61617c478bd9Sstevel@tonic-gate ((delta > ip_multirt_resolution_interval) || 61627c478bd9Sstevel@tonic-gate (!(flags & MULTIRT_USESTAMP))); 61637c478bd9Sstevel@tonic-gate 61647c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: fire %p, delta %lu, " 61657c478bd9Sstevel@tonic-gate "res %d\n", 61667c478bd9Sstevel@tonic-gate (void *)fire, delta, res)); 61677c478bd9Sstevel@tonic-gate 61687c478bd9Sstevel@tonic-gate if (res) { 61697c478bd9Sstevel@tonic-gate /* 61707c478bd9Sstevel@tonic-gate * We are here if MULTIRT_USESTAMP flag is set 61717c478bd9Sstevel@tonic-gate * and the resolver for fire's gateway 61727c478bd9Sstevel@tonic-gate * has not been tried since 61737c478bd9Sstevel@tonic-gate * ip_multirt_resolution_interval, or if 61747c478bd9Sstevel@tonic-gate * MULTIRT_USESTAMP is not set but gw_ire did 61757c478bd9Sstevel@tonic-gate * not fill the conditions for MULTIRT_CACHEGW, 61767c478bd9Sstevel@tonic-gate * or if neither MULTIRT_USESTAMP nor 61777c478bd9Sstevel@tonic-gate * MULTIRT_CACHEGW are set. 61787c478bd9Sstevel@tonic-gate */ 61797c478bd9Sstevel@tonic-gate if (gw_ire != NULL) { 61807c478bd9Sstevel@tonic-gate if (best_fire == NULL) { 61817c478bd9Sstevel@tonic-gate ASSERT(best_cire == NULL); 61827c478bd9Sstevel@tonic-gate 61837c478bd9Sstevel@tonic-gate best_fire = fire; 61847c478bd9Sstevel@tonic-gate best_cire = gw_ire; 61857c478bd9Sstevel@tonic-gate 61867c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup:" 61877c478bd9Sstevel@tonic-gate "found candidate " 61887c478bd9Sstevel@tonic-gate "best_fire %p, " 61897c478bd9Sstevel@tonic-gate "best_cire %p\n", 61907c478bd9Sstevel@tonic-gate (void *)best_fire, 61917c478bd9Sstevel@tonic-gate (void *)best_cire)); 61927c478bd9Sstevel@tonic-gate 61937c478bd9Sstevel@tonic-gate /* 61947c478bd9Sstevel@tonic-gate * If MULTIRT_CACHEGW is not 61957c478bd9Sstevel@tonic-gate * set, we ignore the top 61967c478bd9Sstevel@tonic-gate * priority ires that can 61977c478bd9Sstevel@tonic-gate * be resolved without any 61987c478bd9Sstevel@tonic-gate * call to the resolver; 61997c478bd9Sstevel@tonic-gate * In that case, there is 62007c478bd9Sstevel@tonic-gate * actually no need 62017c478bd9Sstevel@tonic-gate * to continue the loop. 62027c478bd9Sstevel@tonic-gate */ 62037c478bd9Sstevel@tonic-gate if (!(flags & 62047c478bd9Sstevel@tonic-gate MULTIRT_CACHEGW)) { 62057c478bd9Sstevel@tonic-gate break; 62067c478bd9Sstevel@tonic-gate } 62077c478bd9Sstevel@tonic-gate continue; 62087c478bd9Sstevel@tonic-gate } 62097c478bd9Sstevel@tonic-gate } else { 62107c478bd9Sstevel@tonic-gate /* 62117c478bd9Sstevel@tonic-gate * No resolver for the gateway: the 62127c478bd9Sstevel@tonic-gate * route is not resolvable. 62137c478bd9Sstevel@tonic-gate * If the MULTIRT_SETSTAMP flag is 62147c478bd9Sstevel@tonic-gate * set, we stamp the IRE_HOST ire, 62157c478bd9Sstevel@tonic-gate * so we will not select it again 62167c478bd9Sstevel@tonic-gate * during this resolution interval. 62177c478bd9Sstevel@tonic-gate */ 62187c478bd9Sstevel@tonic-gate if (flags & MULTIRT_SETSTAMP) 62197c478bd9Sstevel@tonic-gate fire->ire_last_used_time = 62207c478bd9Sstevel@tonic-gate lbolt; 62217c478bd9Sstevel@tonic-gate } 62227c478bd9Sstevel@tonic-gate } 62237c478bd9Sstevel@tonic-gate 62247c478bd9Sstevel@tonic-gate if (gw_ire != NULL) 62257c478bd9Sstevel@tonic-gate ire_refrele(gw_ire); 62267c478bd9Sstevel@tonic-gate } 62277c478bd9Sstevel@tonic-gate } else { /* CLASSD(dst) */ 62287c478bd9Sstevel@tonic-gate 62297c478bd9Sstevel@tonic-gate for (fire = first_fire; 62307c478bd9Sstevel@tonic-gate fire != NULL; 62317c478bd9Sstevel@tonic-gate fire = fire->ire_next) { 62327c478bd9Sstevel@tonic-gate 62337c478bd9Sstevel@tonic-gate if (!(fire->ire_flags & RTF_MULTIRT)) 62347c478bd9Sstevel@tonic-gate continue; 62357c478bd9Sstevel@tonic-gate if (fire->ire_addr != dst) 62367c478bd9Sstevel@tonic-gate continue; 62377c478bd9Sstevel@tonic-gate 623845916cd2Sjpk if (fire->ire_gw_secattr != NULL && 623945916cd2Sjpk tsol_ire_match_gwattr(fire, tsl) != 0) { 624045916cd2Sjpk continue; 624145916cd2Sjpk } 624245916cd2Sjpk 62437c478bd9Sstevel@tonic-gate already_resolved = B_FALSE; 62447c478bd9Sstevel@tonic-gate 62457c478bd9Sstevel@tonic-gate gw = fire->ire_gateway_addr; 62467c478bd9Sstevel@tonic-gate 62477c478bd9Sstevel@tonic-gate gw_ire = ire_ftable_lookup(gw, 0, 0, IRE_INTERFACE, 624845916cd2Sjpk NULL, NULL, ALL_ZONES, 0, tsl, 624945916cd2Sjpk MATCH_IRE_RECURSIVE | MATCH_IRE_TYPE | 625045916cd2Sjpk MATCH_IRE_SECATTR); 62517c478bd9Sstevel@tonic-gate 62527c478bd9Sstevel@tonic-gate /* No resolver for the gateway; we skip this ire. */ 62537c478bd9Sstevel@tonic-gate if (gw_ire == NULL) { 62547c478bd9Sstevel@tonic-gate continue; 62557c478bd9Sstevel@tonic-gate } 6256c793af95Ssangeeta ASSERT(gw_ire->ire_nce == NULL || 6257c793af95Ssangeeta gw_ire->ire_nce->nce_state == ND_REACHABLE); 62587c478bd9Sstevel@tonic-gate 62597c478bd9Sstevel@tonic-gate if (first_cire != NULL) { 62607c478bd9Sstevel@tonic-gate 62617c478bd9Sstevel@tonic-gate IRB_REFHOLD(cirb); 62627c478bd9Sstevel@tonic-gate /* 62637c478bd9Sstevel@tonic-gate * For all IRE_CACHE ires for that 62647c478bd9Sstevel@tonic-gate * destination. 62657c478bd9Sstevel@tonic-gate */ 62667c478bd9Sstevel@tonic-gate for (cire = first_cire; 62677c478bd9Sstevel@tonic-gate cire != NULL; 62687c478bd9Sstevel@tonic-gate cire = cire->ire_next) { 62697c478bd9Sstevel@tonic-gate 62707c478bd9Sstevel@tonic-gate if (!(cire->ire_flags & RTF_MULTIRT)) 62717c478bd9Sstevel@tonic-gate continue; 62727c478bd9Sstevel@tonic-gate if (cire->ire_addr != dst) 62737c478bd9Sstevel@tonic-gate continue; 62747c478bd9Sstevel@tonic-gate if (cire->ire_marks & 62757c478bd9Sstevel@tonic-gate (IRE_MARK_CONDEMNED | 62767c478bd9Sstevel@tonic-gate IRE_MARK_HIDDEN)) 62777c478bd9Sstevel@tonic-gate continue; 62787c478bd9Sstevel@tonic-gate 627945916cd2Sjpk if (cire->ire_gw_secattr != NULL && 628045916cd2Sjpk tsol_ire_match_gwattr(cire, 628145916cd2Sjpk tsl) != 0) { 628245916cd2Sjpk continue; 628345916cd2Sjpk } 628445916cd2Sjpk 62857c478bd9Sstevel@tonic-gate /* 62867c478bd9Sstevel@tonic-gate * Cache entries are linked to the 62877c478bd9Sstevel@tonic-gate * parent routes using the parent handle 62887c478bd9Sstevel@tonic-gate * (ire_phandle). If no cache entry has 62897c478bd9Sstevel@tonic-gate * the same handle as fire, fire is 62907c478bd9Sstevel@tonic-gate * still unresolved. 62917c478bd9Sstevel@tonic-gate */ 62927c478bd9Sstevel@tonic-gate ASSERT(cire->ire_phandle != 0); 62937c478bd9Sstevel@tonic-gate if (cire->ire_phandle == 62947c478bd9Sstevel@tonic-gate fire->ire_phandle) { 62957c478bd9Sstevel@tonic-gate already_resolved = B_TRUE; 62967c478bd9Sstevel@tonic-gate break; 62977c478bd9Sstevel@tonic-gate } 62987c478bd9Sstevel@tonic-gate } 62997c478bd9Sstevel@tonic-gate IRB_REFRELE(cirb); 63007c478bd9Sstevel@tonic-gate } 63017c478bd9Sstevel@tonic-gate 63027c478bd9Sstevel@tonic-gate /* 63037c478bd9Sstevel@tonic-gate * This route is already resolved; proceed with 63047c478bd9Sstevel@tonic-gate * next one. 63057c478bd9Sstevel@tonic-gate */ 63067c478bd9Sstevel@tonic-gate if (already_resolved) { 63077c478bd9Sstevel@tonic-gate ire_refrele(gw_ire); 63087c478bd9Sstevel@tonic-gate continue; 63097c478bd9Sstevel@tonic-gate } 63107c478bd9Sstevel@tonic-gate 63117c478bd9Sstevel@tonic-gate /* 63127c478bd9Sstevel@tonic-gate * Compute the time elapsed since our preceding 63137c478bd9Sstevel@tonic-gate * attempt to resolve that route. 63147c478bd9Sstevel@tonic-gate * If the MULTIRT_USESTAMP flag is set, we take 63157c478bd9Sstevel@tonic-gate * that route into account only if this time 63167c478bd9Sstevel@tonic-gate * interval exceeds ip_multirt_resolution_interval; 63177c478bd9Sstevel@tonic-gate * this prevents us from attempting to resolve a 63187c478bd9Sstevel@tonic-gate * broken route upon each sending of a packet. 63197c478bd9Sstevel@tonic-gate */ 63207c478bd9Sstevel@tonic-gate delta = lbolt - fire->ire_last_used_time; 63217c478bd9Sstevel@tonic-gate delta = TICK_TO_MSEC(delta); 63227c478bd9Sstevel@tonic-gate 63237c478bd9Sstevel@tonic-gate res = (boolean_t) 63247c478bd9Sstevel@tonic-gate ((delta > ip_multirt_resolution_interval) || 63257c478bd9Sstevel@tonic-gate (!(flags & MULTIRT_USESTAMP))); 63267c478bd9Sstevel@tonic-gate 63277c478bd9Sstevel@tonic-gate ip3dbg(("ire_multirt_lookup: fire %p, delta %lx, " 63287c478bd9Sstevel@tonic-gate "flags %04x, res %d\n", 63297c478bd9Sstevel@tonic-gate (void *)fire, delta, flags, res)); 63307c478bd9Sstevel@tonic-gate 63317c478bd9Sstevel@tonic-gate if (res) { 63327c478bd9Sstevel@tonic-gate if (best_cire != NULL) { 63337c478bd9Sstevel@tonic-gate /* 63347c478bd9Sstevel@tonic-gate * Release the resolver associated 63357c478bd9Sstevel@tonic-gate * to the preceding candidate best 63367c478bd9Sstevel@tonic-gate * ire, if any. 63377c478bd9Sstevel@tonic-gate */ 63387c478bd9Sstevel@tonic-gate ire_refrele(best_cire); 63397c478bd9Sstevel@tonic-gate ASSERT(best_fire != NULL); 63407c478bd9Sstevel@tonic-gate } 63417c478bd9Sstevel@tonic-gate best_fire = fire; 63427c478bd9Sstevel@tonic-gate best_cire = gw_ire; 63437c478bd9Sstevel@tonic-gate continue; 63447c478bd9Sstevel@tonic-gate } 63457c478bd9Sstevel@tonic-gate 63467c478bd9Sstevel@tonic-gate ire_refrele(gw_ire); 63477c478bd9Sstevel@tonic-gate } 63487c478bd9Sstevel@tonic-gate } 63497c478bd9Sstevel@tonic-gate 63507c478bd9Sstevel@tonic-gate if (best_fire != NULL) { 63517c478bd9Sstevel@tonic-gate IRE_REFHOLD(best_fire); 63527c478bd9Sstevel@tonic-gate } 63537c478bd9Sstevel@tonic-gate IRB_REFRELE(firb); 63547c478bd9Sstevel@tonic-gate 63557c478bd9Sstevel@tonic-gate /* Release the first IRE_CACHE we initially looked up, if any. */ 63567c478bd9Sstevel@tonic-gate if (first_cire != NULL) 63577c478bd9Sstevel@tonic-gate ire_refrele(first_cire); 63587c478bd9Sstevel@tonic-gate 63597c478bd9Sstevel@tonic-gate /* Found a resolvable route. */ 63607c478bd9Sstevel@tonic-gate if (best_fire != NULL) { 63617c478bd9Sstevel@tonic-gate ASSERT(best_cire != NULL); 63627c478bd9Sstevel@tonic-gate 63637c478bd9Sstevel@tonic-gate if (*fire_arg != NULL) 63647c478bd9Sstevel@tonic-gate ire_refrele(*fire_arg); 63657c478bd9Sstevel@tonic-gate if (*ire_arg != NULL) 63667c478bd9Sstevel@tonic-gate ire_refrele(*ire_arg); 63677c478bd9Sstevel@tonic-gate 63687c478bd9Sstevel@tonic-gate /* 63697c478bd9Sstevel@tonic-gate * Update the passed-in arguments with the 63707c478bd9Sstevel@tonic-gate * resolvable multirt route we found. 63717c478bd9Sstevel@tonic-gate */ 63727c478bd9Sstevel@tonic-gate *fire_arg = best_fire; 63737c478bd9Sstevel@tonic-gate *ire_arg = best_cire; 63747c478bd9Sstevel@tonic-gate 63757c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: returning B_TRUE, " 63767c478bd9Sstevel@tonic-gate "*fire_arg %p, *ire_arg %p\n", 63777c478bd9Sstevel@tonic-gate (void *)best_fire, (void *)best_cire)); 63787c478bd9Sstevel@tonic-gate 63797c478bd9Sstevel@tonic-gate return (B_TRUE); 63807c478bd9Sstevel@tonic-gate } 63817c478bd9Sstevel@tonic-gate 63827c478bd9Sstevel@tonic-gate ASSERT(best_cire == NULL); 63837c478bd9Sstevel@tonic-gate 63847c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: returning B_FALSE, *fire_arg %p, " 63857c478bd9Sstevel@tonic-gate "*ire_arg %p\n", 63867c478bd9Sstevel@tonic-gate (void *)*fire_arg, (void *)*ire_arg)); 63877c478bd9Sstevel@tonic-gate 63887c478bd9Sstevel@tonic-gate /* No resolvable route. */ 63897c478bd9Sstevel@tonic-gate return (B_FALSE); 63907c478bd9Sstevel@tonic-gate } 63917c478bd9Sstevel@tonic-gate 63927c478bd9Sstevel@tonic-gate /* 63937c478bd9Sstevel@tonic-gate * The purpose of the next two functions is to provide some external access to 63947c478bd9Sstevel@tonic-gate * routing/l2 lookup functionality while hiding the implementation of routing 63957c478bd9Sstevel@tonic-gate * and interface data structures (IRE/ILL). Thus, interfaces are passed/ 63967c478bd9Sstevel@tonic-gate * returned by name instead of by ILL reference. These functions are used by 63977c478bd9Sstevel@tonic-gate * IP Filter. 63987c478bd9Sstevel@tonic-gate * Return a link layer header suitable for an IP packet being sent to the 63997c478bd9Sstevel@tonic-gate * dst_addr IP address. The interface associated with the route is put into 64007c478bd9Sstevel@tonic-gate * ifname, which must be a buffer of LIFNAMSIZ bytes. The dst_addr is the 64017c478bd9Sstevel@tonic-gate * packet's ultimate destination address, not a router address. 64027c478bd9Sstevel@tonic-gate * 64037c478bd9Sstevel@tonic-gate * This function is used when the caller wants to know the outbound interface 64047c478bd9Sstevel@tonic-gate * and MAC header for a packet given only the address. 64057c478bd9Sstevel@tonic-gate */ 64067c478bd9Sstevel@tonic-gate mblk_t * 64077c478bd9Sstevel@tonic-gate ip_nexthop_route(const struct sockaddr *target, char *ifname) 64087c478bd9Sstevel@tonic-gate { 64097663b816Sml37995 struct nce_s *nce; 641087c3980eSdr146992 ire_t *dir; 64117c478bd9Sstevel@tonic-gate ill_t *ill; 6412c793af95Ssangeeta mblk_t *mp, *tmp_mp; 64137c478bd9Sstevel@tonic-gate 64147c478bd9Sstevel@tonic-gate /* parameter sanity */ 64157c478bd9Sstevel@tonic-gate if (ifname == NULL || target == NULL) 64167c478bd9Sstevel@tonic-gate return (NULL); 64177c478bd9Sstevel@tonic-gate 64187c478bd9Sstevel@tonic-gate /* Find the route entry, if it exists. */ 64197c478bd9Sstevel@tonic-gate switch (target->sa_family) { 64207c478bd9Sstevel@tonic-gate case AF_INET: 64217c478bd9Sstevel@tonic-gate dir = ire_route_lookup( 64227c478bd9Sstevel@tonic-gate ((struct sockaddr_in *)target)->sin_addr.s_addr, 64237c478bd9Sstevel@tonic-gate 0xffffffff, 642445916cd2Sjpk 0, 0, NULL, NULL, ALL_ZONES, NULL, 64257c478bd9Sstevel@tonic-gate MATCH_IRE_DSTONLY|MATCH_IRE_DEFAULT|MATCH_IRE_RECURSIVE); 64267c478bd9Sstevel@tonic-gate break; 64277c478bd9Sstevel@tonic-gate case AF_INET6: 64287c478bd9Sstevel@tonic-gate dir = ire_route_lookup_v6( 64297c478bd9Sstevel@tonic-gate &((struct sockaddr_in6 *)target)->sin6_addr, 64307c478bd9Sstevel@tonic-gate NULL, 643145916cd2Sjpk 0, 0, NULL, NULL, ALL_ZONES, NULL, 64327c478bd9Sstevel@tonic-gate MATCH_IRE_DSTONLY|MATCH_IRE_DEFAULT|MATCH_IRE_RECURSIVE); 64337663b816Sml37995 if ((dir != NULL) && (dir->ire_nce == NULL)) { 64347663b816Sml37995 ire_refrele(dir); 64357663b816Sml37995 dir = NULL; 64367663b816Sml37995 } 64377c478bd9Sstevel@tonic-gate break; 64387c478bd9Sstevel@tonic-gate default: 64397c478bd9Sstevel@tonic-gate dir = NULL; 64407c478bd9Sstevel@tonic-gate break; 64417c478bd9Sstevel@tonic-gate } 64427c478bd9Sstevel@tonic-gate 6443c793af95Ssangeeta if (dir == NULL) { 64447c478bd9Sstevel@tonic-gate return (NULL); 6445c793af95Ssangeeta } 64467c478bd9Sstevel@tonic-gate 64477c478bd9Sstevel@tonic-gate /* Map the IRE to an ILL so we can fill in ifname. */ 64487c478bd9Sstevel@tonic-gate ill = ire_to_ill(dir); 64497c478bd9Sstevel@tonic-gate if (ill == NULL) { 64507c478bd9Sstevel@tonic-gate ire_refrele(dir); 64517c478bd9Sstevel@tonic-gate return (NULL); 64527c478bd9Sstevel@tonic-gate } 64537c478bd9Sstevel@tonic-gate (void) strncpy(ifname, ill->ill_name, LIFNAMSIZ); 64547c478bd9Sstevel@tonic-gate 6455c793af95Ssangeeta if ((dir->ire_type & (IRE_CACHE|IRE_BROADCAST)) == 0) { 6456c793af95Ssangeeta mp = copyb(ill->ill_resolver_mp); 6457c793af95Ssangeeta ire_refrele(dir); 6458c793af95Ssangeeta return (mp); 6459c793af95Ssangeeta } 6460c793af95Ssangeeta 64617c478bd9Sstevel@tonic-gate /* Return a copy of the header to the caller. */ 64627663b816Sml37995 switch (target->sa_family) { 64637663b816Sml37995 case AF_INET : 6464c793af95Ssangeeta if (dir->ire_nce != NULL && 6465c793af95Ssangeeta dir->ire_nce->nce_state == ND_REACHABLE) { 6466c793af95Ssangeeta if (dir->ire_nce->nce_fp_mp != NULL) 6467c793af95Ssangeeta tmp_mp = dir->ire_nce->nce_fp_mp; 6468c793af95Ssangeeta else 6469c793af95Ssangeeta tmp_mp = dir->ire_nce->nce_fp_mp; 6470c793af95Ssangeeta if ((mp = dupb(tmp_mp)) == NULL) 6471c793af95Ssangeeta mp = copyb(tmp_mp); 64727c478bd9Sstevel@tonic-gate } else { 6473c793af95Ssangeeta mp = copyb(ill->ill_resolver_mp); 64747c478bd9Sstevel@tonic-gate } 64757663b816Sml37995 break; 64767663b816Sml37995 case AF_INET6 : 64777663b816Sml37995 nce = dir->ire_nce; 64787663b816Sml37995 if (nce->nce_fp_mp != NULL) { 64797663b816Sml37995 if ((mp = dupb(nce->nce_fp_mp)) == NULL) 64807663b816Sml37995 mp = copyb(nce->nce_fp_mp); 64817663b816Sml37995 } else if (nce->nce_res_mp != NULL) { 64827663b816Sml37995 if ((mp = dupb(nce->nce_res_mp)) == NULL) 64837663b816Sml37995 mp = copyb(nce->nce_res_mp); 64847663b816Sml37995 } else { 64857663b816Sml37995 mp = NULL; 64867663b816Sml37995 } 64877663b816Sml37995 break; 64887663b816Sml37995 } 64897c478bd9Sstevel@tonic-gate 64907c478bd9Sstevel@tonic-gate ire_refrele(dir); 64917c478bd9Sstevel@tonic-gate return (mp); 64927c478bd9Sstevel@tonic-gate } 64937c478bd9Sstevel@tonic-gate 64947c478bd9Sstevel@tonic-gate 64957c478bd9Sstevel@tonic-gate /* 64967c478bd9Sstevel@tonic-gate * Return a link layer header suitable for an IP packet being sent to the 64977c478bd9Sstevel@tonic-gate * dst_addr IP address on the specified output interface. The dst_addr 64987c478bd9Sstevel@tonic-gate * may be the packet's ultimate destination or a predetermined next hop 64997c478bd9Sstevel@tonic-gate * router's address. 65007c478bd9Sstevel@tonic-gate * ifname must be nul-terminated. 65017c478bd9Sstevel@tonic-gate * 65027c478bd9Sstevel@tonic-gate * This function is used when the caller knows the outbound interface (usually 65037c478bd9Sstevel@tonic-gate * because it was specified by policy) and only needs the MAC header for a 65047c478bd9Sstevel@tonic-gate * packet. 65057c478bd9Sstevel@tonic-gate */ 65067c478bd9Sstevel@tonic-gate mblk_t * 65077c478bd9Sstevel@tonic-gate ip_nexthop(const struct sockaddr *target, const char *ifname) 65087c478bd9Sstevel@tonic-gate { 65097663b816Sml37995 struct nce_s *nce; 65107c478bd9Sstevel@tonic-gate ill_walk_context_t ctx; 65117c478bd9Sstevel@tonic-gate t_uscalar_t sap; 651287c3980eSdr146992 ire_t *dir; 65137c478bd9Sstevel@tonic-gate ill_t *ill; 65147c478bd9Sstevel@tonic-gate mblk_t *mp; 65157c478bd9Sstevel@tonic-gate 65167c478bd9Sstevel@tonic-gate /* parameter sanity */ 65177c478bd9Sstevel@tonic-gate if (ifname == NULL || target == NULL) 65187c478bd9Sstevel@tonic-gate return (NULL); 65197c478bd9Sstevel@tonic-gate 65207c478bd9Sstevel@tonic-gate switch (target->sa_family) { 65217c478bd9Sstevel@tonic-gate case AF_INET : 65227c478bd9Sstevel@tonic-gate sap = IP_DL_SAP; 65237c478bd9Sstevel@tonic-gate break; 65247c478bd9Sstevel@tonic-gate case AF_INET6 : 65257c478bd9Sstevel@tonic-gate sap = IP6_DL_SAP; 65267c478bd9Sstevel@tonic-gate break; 65277c478bd9Sstevel@tonic-gate default: 65287c478bd9Sstevel@tonic-gate return (NULL); 65297c478bd9Sstevel@tonic-gate } 65307c478bd9Sstevel@tonic-gate 65317c478bd9Sstevel@tonic-gate /* Lock ill_g_lock before walking through the list */ 65327c478bd9Sstevel@tonic-gate rw_enter(&ill_g_lock, RW_READER); 65337c478bd9Sstevel@tonic-gate /* 65347c478bd9Sstevel@tonic-gate * Can we find the interface name among those currently configured? 65357c478bd9Sstevel@tonic-gate */ 65367c478bd9Sstevel@tonic-gate for (ill = ILL_START_WALK_ALL(&ctx); ill != NULL; 65377c478bd9Sstevel@tonic-gate ill = ill_next(&ctx, ill)) { 65387c478bd9Sstevel@tonic-gate if ((strcmp(ifname, ill->ill_name) == 0) && 65397c478bd9Sstevel@tonic-gate (ill->ill_sap == sap)) 65407c478bd9Sstevel@tonic-gate break; 65417c478bd9Sstevel@tonic-gate } 65427c478bd9Sstevel@tonic-gate if (ill == NULL || ill->ill_ipif == NULL) { 65437c478bd9Sstevel@tonic-gate rw_exit(&ill_g_lock); 65447c478bd9Sstevel@tonic-gate return (NULL); 65457c478bd9Sstevel@tonic-gate } 65467c478bd9Sstevel@tonic-gate 65477c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 65487c478bd9Sstevel@tonic-gate if (!ILL_CAN_LOOKUP(ill)) { 65497c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 65507c478bd9Sstevel@tonic-gate rw_exit(&ill_g_lock); 65517c478bd9Sstevel@tonic-gate return (NULL); 65527c478bd9Sstevel@tonic-gate } 65537c478bd9Sstevel@tonic-gate ill_refhold_locked(ill); 65547c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 65557c478bd9Sstevel@tonic-gate rw_exit(&ill_g_lock); 65567c478bd9Sstevel@tonic-gate 65577c478bd9Sstevel@tonic-gate /* Find the resolver entry, if it exists. */ 65587c478bd9Sstevel@tonic-gate switch (target->sa_family) { 65597c478bd9Sstevel@tonic-gate case AF_INET: 65607c478bd9Sstevel@tonic-gate dir = ire_route_lookup( 65617c478bd9Sstevel@tonic-gate ((struct sockaddr_in *)target)->sin_addr.s_addr, 65627c478bd9Sstevel@tonic-gate 0xffffffff, 656345916cd2Sjpk 0, 0, ill->ill_ipif, NULL, ALL_ZONES, NULL, 65647c478bd9Sstevel@tonic-gate MATCH_IRE_DSTONLY|MATCH_IRE_DEFAULT| 65657c478bd9Sstevel@tonic-gate MATCH_IRE_RECURSIVE|MATCH_IRE_IPIF); 6566c793af95Ssangeeta if ((dir != NULL) && dir->ire_nce != NULL && 6567c793af95Ssangeeta dir->ire_nce->nce_state != ND_REACHABLE) { 6568c793af95Ssangeeta ire_refrele(dir); 6569c793af95Ssangeeta dir = NULL; 6570c793af95Ssangeeta } 65717c478bd9Sstevel@tonic-gate break; 65727c478bd9Sstevel@tonic-gate case AF_INET6: 65737c478bd9Sstevel@tonic-gate dir = ire_route_lookup_v6( 65747c478bd9Sstevel@tonic-gate &((struct sockaddr_in6 *)target)->sin6_addr, NULL, 657545916cd2Sjpk 0, 0, ill->ill_ipif, NULL, ALL_ZONES, NULL, 65767c478bd9Sstevel@tonic-gate MATCH_IRE_DSTONLY|MATCH_IRE_DEFAULT| 65777c478bd9Sstevel@tonic-gate MATCH_IRE_RECURSIVE|MATCH_IRE_IPIF); 65787663b816Sml37995 if ((dir != NULL) && (dir->ire_nce == NULL)) { 65797663b816Sml37995 ire_refrele(dir); 65807663b816Sml37995 dir = NULL; 65817663b816Sml37995 } 65827c478bd9Sstevel@tonic-gate break; 65837c478bd9Sstevel@tonic-gate default: 65847c478bd9Sstevel@tonic-gate dir = NULL; 65857c478bd9Sstevel@tonic-gate break; 65867c478bd9Sstevel@tonic-gate } 65877c478bd9Sstevel@tonic-gate 6588c793af95Ssangeeta if (dir == NULL) { 65897c478bd9Sstevel@tonic-gate return (NULL); 6590c793af95Ssangeeta } 6591c793af95Ssangeeta 6592c793af95Ssangeeta if ((dir->ire_type & (IRE_CACHE|IRE_BROADCAST)) == 0) { 6593c793af95Ssangeeta mp = copyb(ill->ill_resolver_mp); 6594c793af95Ssangeeta ill_refrele(ill); 6595c793af95Ssangeeta ire_refrele(dir); 6596c793af95Ssangeeta return (mp); 6597c793af95Ssangeeta } 65987c478bd9Sstevel@tonic-gate 65997c478bd9Sstevel@tonic-gate /* Return a copy of the header to the caller. */ 66007663b816Sml37995 switch (target->sa_family) { 66017663b816Sml37995 case AF_INET : 6602c793af95Ssangeeta if (dir->ire_nce->nce_fp_mp != NULL) { 6603c793af95Ssangeeta if ((mp = dupb(dir->ire_nce->nce_fp_mp)) == NULL) 6604c793af95Ssangeeta mp = copyb(dir->ire_nce->nce_fp_mp); 6605c793af95Ssangeeta } else if (dir->ire_nce->nce_res_mp != NULL) { 6606c793af95Ssangeeta if ((mp = dupb(dir->ire_nce->nce_res_mp)) == NULL) 6607c793af95Ssangeeta mp = copyb(dir->ire_nce->nce_res_mp); 66087c478bd9Sstevel@tonic-gate } else { 6609c793af95Ssangeeta mp = copyb(ill->ill_resolver_mp); 66107c478bd9Sstevel@tonic-gate } 66117663b816Sml37995 break; 66127663b816Sml37995 case AF_INET6 : 66137663b816Sml37995 nce = dir->ire_nce; 66147663b816Sml37995 if (nce->nce_fp_mp != NULL) { 66157663b816Sml37995 if ((mp = dupb(nce->nce_fp_mp)) == NULL) 66167663b816Sml37995 mp = copyb(nce->nce_fp_mp); 66177663b816Sml37995 } else if (nce->nce_res_mp != NULL) { 66187663b816Sml37995 if ((mp = dupb(nce->nce_res_mp)) == NULL) 66197663b816Sml37995 mp = copyb(nce->nce_res_mp); 66207663b816Sml37995 } else { 66217663b816Sml37995 mp = NULL; 66227663b816Sml37995 } 66237663b816Sml37995 break; 66247663b816Sml37995 } 66257c478bd9Sstevel@tonic-gate 66267c478bd9Sstevel@tonic-gate ire_refrele(dir); 6627c793af95Ssangeeta ill_refrele(ill); 66287c478bd9Sstevel@tonic-gate return (mp); 66297c478bd9Sstevel@tonic-gate } 66307c478bd9Sstevel@tonic-gate 66317c478bd9Sstevel@tonic-gate /* 66327c478bd9Sstevel@tonic-gate * IRE iterator for inbound and loopback broadcast processing. 66337c478bd9Sstevel@tonic-gate * Given an IRE_BROADCAST ire, walk the ires with the same destination 66347c478bd9Sstevel@tonic-gate * address, but skip over the passed-in ire. Returns the next ire without 66357c478bd9Sstevel@tonic-gate * a hold - assumes that the caller holds a reference on the IRE bucket. 66367c478bd9Sstevel@tonic-gate */ 66377c478bd9Sstevel@tonic-gate ire_t * 66387c478bd9Sstevel@tonic-gate ire_get_next_bcast_ire(ire_t *curr, ire_t *ire) 66397c478bd9Sstevel@tonic-gate { 66407c478bd9Sstevel@tonic-gate ill_t *ill; 66417c478bd9Sstevel@tonic-gate 66427c478bd9Sstevel@tonic-gate if (curr == NULL) { 66437c478bd9Sstevel@tonic-gate for (curr = ire->ire_bucket->irb_ire; curr != NULL; 66447c478bd9Sstevel@tonic-gate curr = curr->ire_next) { 66457c478bd9Sstevel@tonic-gate if (curr->ire_addr == ire->ire_addr) 66467c478bd9Sstevel@tonic-gate break; 66477c478bd9Sstevel@tonic-gate } 66487c478bd9Sstevel@tonic-gate } else { 66497c478bd9Sstevel@tonic-gate curr = curr->ire_next; 66507c478bd9Sstevel@tonic-gate } 66517c478bd9Sstevel@tonic-gate ill = ire_to_ill(ire); 66527c478bd9Sstevel@tonic-gate for (; curr != NULL; curr = curr->ire_next) { 66537c478bd9Sstevel@tonic-gate if (curr->ire_addr != ire->ire_addr) { 66547c478bd9Sstevel@tonic-gate /* 66557c478bd9Sstevel@tonic-gate * All the IREs to a given destination are contiguous; 66567c478bd9Sstevel@tonic-gate * break out once the address doesn't match. 66577c478bd9Sstevel@tonic-gate */ 66587c478bd9Sstevel@tonic-gate break; 66597c478bd9Sstevel@tonic-gate } 66607c478bd9Sstevel@tonic-gate if (curr == ire) { 66617c478bd9Sstevel@tonic-gate /* skip over the passed-in ire */ 66627c478bd9Sstevel@tonic-gate continue; 66637c478bd9Sstevel@tonic-gate } 66647c478bd9Sstevel@tonic-gate if ((curr->ire_stq != NULL && ire->ire_stq == NULL) || 66657c478bd9Sstevel@tonic-gate (curr->ire_stq == NULL && ire->ire_stq != NULL)) { 66667c478bd9Sstevel@tonic-gate /* 66677c478bd9Sstevel@tonic-gate * If the passed-in ire is loopback, skip over 66687c478bd9Sstevel@tonic-gate * non-loopback ires and vice versa. 66697c478bd9Sstevel@tonic-gate */ 66707c478bd9Sstevel@tonic-gate continue; 66717c478bd9Sstevel@tonic-gate } 66727c478bd9Sstevel@tonic-gate if (ire_to_ill(curr) != ill) { 66737c478bd9Sstevel@tonic-gate /* skip over IREs going through a different interface */ 66747c478bd9Sstevel@tonic-gate continue; 66757c478bd9Sstevel@tonic-gate } 66767c478bd9Sstevel@tonic-gate if (curr->ire_marks & IRE_MARK_CONDEMNED) { 66777c478bd9Sstevel@tonic-gate /* skip over deleted IREs */ 66787c478bd9Sstevel@tonic-gate continue; 66797c478bd9Sstevel@tonic-gate } 66807c478bd9Sstevel@tonic-gate return (curr); 66817c478bd9Sstevel@tonic-gate } 66827c478bd9Sstevel@tonic-gate return (NULL); 66837c478bd9Sstevel@tonic-gate } 66847c478bd9Sstevel@tonic-gate 66857c478bd9Sstevel@tonic-gate #ifdef IRE_DEBUG 66867c478bd9Sstevel@tonic-gate th_trace_t * 66877c478bd9Sstevel@tonic-gate th_trace_ire_lookup(ire_t *ire) 66887c478bd9Sstevel@tonic-gate { 66897c478bd9Sstevel@tonic-gate int bucket_id; 66907c478bd9Sstevel@tonic-gate th_trace_t *th_trace; 66917c478bd9Sstevel@tonic-gate 66927c478bd9Sstevel@tonic-gate ASSERT(MUTEX_HELD(&ire->ire_lock)); 66937c478bd9Sstevel@tonic-gate 66947c478bd9Sstevel@tonic-gate bucket_id = IP_TR_HASH(curthread); 66957c478bd9Sstevel@tonic-gate ASSERT(bucket_id < IP_TR_HASH_MAX); 66967c478bd9Sstevel@tonic-gate 66977c478bd9Sstevel@tonic-gate for (th_trace = ire->ire_trace[bucket_id]; th_trace != NULL; 66987c478bd9Sstevel@tonic-gate th_trace = th_trace->th_next) { 66997c478bd9Sstevel@tonic-gate if (th_trace->th_id == curthread) 67007c478bd9Sstevel@tonic-gate return (th_trace); 67017c478bd9Sstevel@tonic-gate } 67027c478bd9Sstevel@tonic-gate return (NULL); 67037c478bd9Sstevel@tonic-gate } 67047c478bd9Sstevel@tonic-gate 67057c478bd9Sstevel@tonic-gate void 67067c478bd9Sstevel@tonic-gate ire_trace_ref(ire_t *ire) 67077c478bd9Sstevel@tonic-gate { 67087c478bd9Sstevel@tonic-gate int bucket_id; 67097c478bd9Sstevel@tonic-gate th_trace_t *th_trace; 67107c478bd9Sstevel@tonic-gate 67117c478bd9Sstevel@tonic-gate /* 67127c478bd9Sstevel@tonic-gate * Attempt to locate the trace buffer for the curthread. 67137c478bd9Sstevel@tonic-gate * If it does not exist, then allocate a new trace buffer 67147c478bd9Sstevel@tonic-gate * and link it in list of trace bufs for this ipif, at the head 67157c478bd9Sstevel@tonic-gate */ 67167c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 67177c478bd9Sstevel@tonic-gate if (ire->ire_trace_disable == B_TRUE) { 67187c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 67197c478bd9Sstevel@tonic-gate return; 67207c478bd9Sstevel@tonic-gate } 67217c478bd9Sstevel@tonic-gate th_trace = th_trace_ire_lookup(ire); 67227c478bd9Sstevel@tonic-gate if (th_trace == NULL) { 67237c478bd9Sstevel@tonic-gate bucket_id = IP_TR_HASH(curthread); 67247c478bd9Sstevel@tonic-gate th_trace = (th_trace_t *)kmem_zalloc(sizeof (th_trace_t), 67257c478bd9Sstevel@tonic-gate KM_NOSLEEP); 67267c478bd9Sstevel@tonic-gate if (th_trace == NULL) { 67277c478bd9Sstevel@tonic-gate ire->ire_trace_disable = B_TRUE; 67287c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 67297c478bd9Sstevel@tonic-gate ire_trace_inactive(ire); 67307c478bd9Sstevel@tonic-gate return; 67317c478bd9Sstevel@tonic-gate } 67327c478bd9Sstevel@tonic-gate 67337c478bd9Sstevel@tonic-gate th_trace->th_id = curthread; 67347c478bd9Sstevel@tonic-gate th_trace->th_next = ire->ire_trace[bucket_id]; 67357c478bd9Sstevel@tonic-gate th_trace->th_prev = &ire->ire_trace[bucket_id]; 67367c478bd9Sstevel@tonic-gate if (th_trace->th_next != NULL) 67377c478bd9Sstevel@tonic-gate th_trace->th_next->th_prev = &th_trace->th_next; 67387c478bd9Sstevel@tonic-gate ire->ire_trace[bucket_id] = th_trace; 67397c478bd9Sstevel@tonic-gate } 67407c478bd9Sstevel@tonic-gate ASSERT(th_trace->th_refcnt < TR_BUF_MAX - 1); 67417c478bd9Sstevel@tonic-gate th_trace->th_refcnt++; 67427c478bd9Sstevel@tonic-gate th_trace_rrecord(th_trace); 67437c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 67447c478bd9Sstevel@tonic-gate } 67457c478bd9Sstevel@tonic-gate 67467c478bd9Sstevel@tonic-gate void 67477c478bd9Sstevel@tonic-gate ire_trace_free(th_trace_t *th_trace) 67487c478bd9Sstevel@tonic-gate { 67497c478bd9Sstevel@tonic-gate /* unlink th_trace and free it */ 67507c478bd9Sstevel@tonic-gate *th_trace->th_prev = th_trace->th_next; 67517c478bd9Sstevel@tonic-gate if (th_trace->th_next != NULL) 67527c478bd9Sstevel@tonic-gate th_trace->th_next->th_prev = th_trace->th_prev; 67537c478bd9Sstevel@tonic-gate th_trace->th_next = NULL; 67547c478bd9Sstevel@tonic-gate th_trace->th_prev = NULL; 67557c478bd9Sstevel@tonic-gate kmem_free(th_trace, sizeof (th_trace_t)); 67567c478bd9Sstevel@tonic-gate } 67577c478bd9Sstevel@tonic-gate 67587c478bd9Sstevel@tonic-gate void 67597c478bd9Sstevel@tonic-gate ire_untrace_ref(ire_t *ire) 67607c478bd9Sstevel@tonic-gate { 67617c478bd9Sstevel@tonic-gate th_trace_t *th_trace; 67627c478bd9Sstevel@tonic-gate 67637c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 67647c478bd9Sstevel@tonic-gate 67657c478bd9Sstevel@tonic-gate if (ire->ire_trace_disable == B_TRUE) { 67667c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 67677c478bd9Sstevel@tonic-gate return; 67687c478bd9Sstevel@tonic-gate } 67697c478bd9Sstevel@tonic-gate 67707c478bd9Sstevel@tonic-gate th_trace = th_trace_ire_lookup(ire); 67717c478bd9Sstevel@tonic-gate ASSERT(th_trace != NULL && th_trace->th_refcnt > 0); 67727c478bd9Sstevel@tonic-gate th_trace_rrecord(th_trace); 67737c478bd9Sstevel@tonic-gate th_trace->th_refcnt--; 67747c478bd9Sstevel@tonic-gate 67757c478bd9Sstevel@tonic-gate if (th_trace->th_refcnt == 0) 67767c478bd9Sstevel@tonic-gate ire_trace_free(th_trace); 67777c478bd9Sstevel@tonic-gate 67787c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 67797c478bd9Sstevel@tonic-gate } 67807c478bd9Sstevel@tonic-gate 67817c478bd9Sstevel@tonic-gate static void 67827c478bd9Sstevel@tonic-gate ire_trace_inactive(ire_t *ire) 67837c478bd9Sstevel@tonic-gate { 67847c478bd9Sstevel@tonic-gate th_trace_t *th_trace; 67857c478bd9Sstevel@tonic-gate int i; 67867c478bd9Sstevel@tonic-gate 67877c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 67887c478bd9Sstevel@tonic-gate for (i = 0; i < IP_TR_HASH_MAX; i++) { 67897c478bd9Sstevel@tonic-gate while (ire->ire_trace[i] != NULL) { 67907c478bd9Sstevel@tonic-gate th_trace = ire->ire_trace[i]; 67917c478bd9Sstevel@tonic-gate 67927c478bd9Sstevel@tonic-gate /* unlink th_trace and free it */ 67937c478bd9Sstevel@tonic-gate ire->ire_trace[i] = th_trace->th_next; 67947c478bd9Sstevel@tonic-gate if (th_trace->th_next != NULL) 67957c478bd9Sstevel@tonic-gate th_trace->th_next->th_prev = 67967c478bd9Sstevel@tonic-gate &ire->ire_trace[i]; 67977c478bd9Sstevel@tonic-gate 67987c478bd9Sstevel@tonic-gate th_trace->th_next = NULL; 67997c478bd9Sstevel@tonic-gate th_trace->th_prev = NULL; 68007c478bd9Sstevel@tonic-gate kmem_free(th_trace, sizeof (th_trace_t)); 68017c478bd9Sstevel@tonic-gate } 68027c478bd9Sstevel@tonic-gate } 68037c478bd9Sstevel@tonic-gate 68047c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 68057c478bd9Sstevel@tonic-gate } 68067c478bd9Sstevel@tonic-gate 68077c478bd9Sstevel@tonic-gate /* ARGSUSED */ 68087c478bd9Sstevel@tonic-gate void 68097c478bd9Sstevel@tonic-gate ire_thread_exit(ire_t *ire, caddr_t arg) 68107c478bd9Sstevel@tonic-gate { 68117c478bd9Sstevel@tonic-gate th_trace_t *th_trace; 68127c478bd9Sstevel@tonic-gate 68137c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 68147c478bd9Sstevel@tonic-gate th_trace = th_trace_ire_lookup(ire); 68157c478bd9Sstevel@tonic-gate if (th_trace == NULL) { 68167c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 68177c478bd9Sstevel@tonic-gate return; 68187c478bd9Sstevel@tonic-gate } 68197c478bd9Sstevel@tonic-gate ASSERT(th_trace->th_refcnt == 0); 68207c478bd9Sstevel@tonic-gate 68217c478bd9Sstevel@tonic-gate ire_trace_free(th_trace); 68227c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 68237c478bd9Sstevel@tonic-gate } 68247c478bd9Sstevel@tonic-gate 68257c478bd9Sstevel@tonic-gate #endif 6826c793af95Ssangeeta 6827c793af95Ssangeeta /* 6828c793af95Ssangeeta * Generate a message chain with an arp request to resolve the in_ire. 6829c793af95Ssangeeta * It is assumed that in_ire itself is currently in the ire cache table, 6830c793af95Ssangeeta * so we create a fake_ire filled with enough information about ire_addr etc. 6831c793af95Ssangeeta * to retrieve in_ire when the DL_UNITDATA response from the resolver 6832c793af95Ssangeeta * comes back. The fake_ire itself is created by calling esballoc with 6833c793af95Ssangeeta * the fr_rtnp (free routine) set to ire_freemblk. This routine will be 6834c793af95Ssangeeta * invoked when the mblk containing fake_ire is freed. 6835c793af95Ssangeeta */ 6836c793af95Ssangeeta void 6837c793af95Ssangeeta ire_arpresolve(ire_t *in_ire, ill_t *dst_ill) 6838c793af95Ssangeeta { 6839c793af95Ssangeeta areq_t *areq; 6840c793af95Ssangeeta ipaddr_t *addrp; 6841c793af95Ssangeeta mblk_t *ire_mp, *dlureq_mp; 6842c793af95Ssangeeta ire_t *ire, *buf; 6843c793af95Ssangeeta size_t bufsize; 6844c793af95Ssangeeta frtn_t *frtnp; 6845c793af95Ssangeeta ill_t *ill; 6846c793af95Ssangeeta 6847c793af95Ssangeeta /* 6848c793af95Ssangeeta * Construct message chain for the resolver 6849c793af95Ssangeeta * of the form: 6850c793af95Ssangeeta * ARP_REQ_MBLK-->IRE_MBLK 6851c793af95Ssangeeta * 6852c793af95Ssangeeta * NOTE : If the response does not 6853c793af95Ssangeeta * come back, ARP frees the packet. For this reason, 6854c793af95Ssangeeta * we can't REFHOLD the bucket of save_ire to prevent 6855c793af95Ssangeeta * deletions. We may not be able to REFRELE the bucket 6856c793af95Ssangeeta * if the response never comes back. Thus, before 6857c793af95Ssangeeta * adding the ire, ire_add_v4 will make sure that the 6858c793af95Ssangeeta * interface route does not get deleted. This is the 6859c793af95Ssangeeta * only case unlike ip_newroute_v6, ip_newroute_ipif_v6 6860c793af95Ssangeeta * where we can always prevent deletions because of 6861c793af95Ssangeeta * the synchronous nature of adding IRES i.e 6862c793af95Ssangeeta * ire_add_then_send is called after creating the IRE. 6863c793af95Ssangeeta */ 6864c793af95Ssangeeta 6865c793af95Ssangeeta /* 6866c793af95Ssangeeta * We use esballoc to allocate the second part(the ire_t size mblk) 6867c793af95Ssangeeta * of the message chain depicted above. THis mblk will be freed 6868c793af95Ssangeeta * by arp when there is a timeout, and otherwise passed to IP 6869c793af95Ssangeeta * and IP will * free it after processing the ARP response. 6870c793af95Ssangeeta */ 6871c793af95Ssangeeta 6872c793af95Ssangeeta bufsize = sizeof (ire_t) + sizeof (frtn_t); 6873c793af95Ssangeeta buf = kmem_alloc(bufsize, KM_NOSLEEP); 6874c793af95Ssangeeta if (buf == NULL) { 6875c793af95Ssangeeta ip1dbg(("ire_arpresolver:alloc buffer failed\n ")); 6876c793af95Ssangeeta return; 6877c793af95Ssangeeta } 6878c793af95Ssangeeta frtnp = (frtn_t *)(buf + 1); 6879c793af95Ssangeeta frtnp->free_arg = (caddr_t)buf; 6880c793af95Ssangeeta frtnp->free_func = ire_freemblk; 6881c793af95Ssangeeta 6882c793af95Ssangeeta ire_mp = esballoc((unsigned char *)buf, bufsize, BPRI_MED, frtnp); 6883c793af95Ssangeeta 6884c793af95Ssangeeta if (ire_mp == NULL) { 6885c793af95Ssangeeta ip1dbg(("ire_arpresolve: esballoc failed\n")); 6886c793af95Ssangeeta kmem_free(buf, bufsize); 6887c793af95Ssangeeta return; 6888c793af95Ssangeeta } 6889c793af95Ssangeeta ASSERT(in_ire->ire_nce != NULL); 6890c793af95Ssangeeta dlureq_mp = copyb(dst_ill->ill_resolver_mp); 6891c793af95Ssangeeta if (dlureq_mp == NULL) { 6892c793af95Ssangeeta kmem_free(buf, bufsize); 6893c793af95Ssangeeta return; 6894c793af95Ssangeeta } 6895c793af95Ssangeeta 6896c793af95Ssangeeta ire_mp->b_datap->db_type = IRE_ARPRESOLVE_TYPE; 6897c793af95Ssangeeta ire = (ire_t *)buf; 6898c793af95Ssangeeta /* 6899c793af95Ssangeeta * keep enough info in the fake ire so that we can pull up 6900c793af95Ssangeeta * the incomplete ire (in_ire) after result comes back from 6901c793af95Ssangeeta * arp and make it complete. 6902c793af95Ssangeeta */ 6903c793af95Ssangeeta *ire = ire_null; 6904c793af95Ssangeeta ire->ire_u = in_ire->ire_u; 6905c793af95Ssangeeta ire->ire_ipif_seqid = in_ire->ire_ipif_seqid; 6906c793af95Ssangeeta ire->ire_ipif = in_ire->ire_ipif; 6907c793af95Ssangeeta ire->ire_stq = in_ire->ire_stq; 6908c793af95Ssangeeta ill = ire_to_ill(ire); 6909c793af95Ssangeeta ire->ire_stq_ifindex = ill->ill_phyint->phyint_ifindex; 6910c793af95Ssangeeta ire->ire_zoneid = in_ire->ire_zoneid; 6911c793af95Ssangeeta /* 6912c793af95Ssangeeta * ire_freemblk will be called when ire_mp is freed, both for 6913c793af95Ssangeeta * successful and failed arp resolution. IRE_MARK_UNCACHED will be set 6914c793af95Ssangeeta * when the arp resolution failed. 6915c793af95Ssangeeta */ 6916c793af95Ssangeeta ire->ire_marks |= IRE_MARK_UNCACHED; 6917c793af95Ssangeeta ire->ire_mp = ire_mp; 6918c793af95Ssangeeta ire_mp->b_wptr = (uchar_t *)&ire[1]; 6919c793af95Ssangeeta ire_mp->b_cont = NULL; 6920c793af95Ssangeeta ASSERT(dlureq_mp != NULL); 6921c793af95Ssangeeta linkb(dlureq_mp, ire_mp); 6922c793af95Ssangeeta 6923c793af95Ssangeeta /* 6924c793af95Ssangeeta * Fill in the source and dest addrs for the resolver. 6925c793af95Ssangeeta * NOTE: this depends on memory layouts imposed by 6926c793af95Ssangeeta * ill_init(). 6927c793af95Ssangeeta */ 6928c793af95Ssangeeta areq = (areq_t *)dlureq_mp->b_rptr; 6929c793af95Ssangeeta addrp = (ipaddr_t *)((char *)areq + areq->areq_sender_addr_offset); 6930c793af95Ssangeeta *addrp = ire->ire_src_addr; 6931c793af95Ssangeeta 6932c793af95Ssangeeta addrp = (ipaddr_t *)((char *)areq + areq->areq_target_addr_offset); 6933c793af95Ssangeeta if (ire->ire_gateway_addr != INADDR_ANY) { 6934c793af95Ssangeeta *addrp = ire->ire_gateway_addr; 6935c793af95Ssangeeta } else { 6936c793af95Ssangeeta *addrp = ire->ire_addr; 6937c793af95Ssangeeta } 6938c793af95Ssangeeta 6939c793af95Ssangeeta /* Up to the resolver. */ 6940c793af95Ssangeeta if (canputnext(dst_ill->ill_rq)) { 6941c793af95Ssangeeta putnext(dst_ill->ill_rq, dlureq_mp); 6942c793af95Ssangeeta } else { 6943c793af95Ssangeeta /* Prepare for cleanup */ 6944c793af95Ssangeeta freemsg(dlureq_mp); 6945c793af95Ssangeeta } 6946c793af95Ssangeeta } 6947c793af95Ssangeeta 6948c793af95Ssangeeta /* 6949c793af95Ssangeeta * Esballoc free function for AR_ENTRY_QUERY request to clean up any 6950c793af95Ssangeeta * unresolved ire_t and/or nce_t structures when ARP resolution fails. 6951c793af95Ssangeeta * 6952c793af95Ssangeeta * This function can be called by ARP via free routine for ire_mp or 6953c793af95Ssangeeta * by IPv4(both host and forwarding path) via ire_delete 6954c793af95Ssangeeta * in case ARP resolution fails. 6955c793af95Ssangeeta * NOTE: Since IP is MT, ARP can call into IP but not vice versa 6956c793af95Ssangeeta * (for IP to talk to ARP, it still has to send AR* messages). 6957c793af95Ssangeeta * 6958c793af95Ssangeeta * Note that the ARP/IP merge should replace the functioanlity by providing 6959c793af95Ssangeeta * direct function calls to clean up unresolved entries in ire/nce lists. 6960c793af95Ssangeeta */ 6961c793af95Ssangeeta void 6962c793af95Ssangeeta ire_freemblk(ire_t *ire_mp) 6963c793af95Ssangeeta { 6964c793af95Ssangeeta nce_t *nce = NULL; 6965c793af95Ssangeeta ill_t *ill; 6966c793af95Ssangeeta 6967c793af95Ssangeeta ASSERT(ire_mp != NULL); 6968c793af95Ssangeeta 6969c793af95Ssangeeta if ((ire_mp->ire_addr == NULL) && (ire_mp->ire_gateway_addr == NULL)) { 6970c793af95Ssangeeta ip1dbg(("ire_freemblk(0x%p) ire_addr is NULL\n", 6971c793af95Ssangeeta (void *)ire_mp)); 6972c793af95Ssangeeta goto cleanup; 6973c793af95Ssangeeta } 6974c793af95Ssangeeta if ((ire_mp->ire_marks & IRE_MARK_UNCACHED) == 0) { 6975c793af95Ssangeeta goto cleanup; /* everything succeeded. just free and return */ 6976c793af95Ssangeeta } 6977c793af95Ssangeeta 6978c793af95Ssangeeta /* 6979c793af95Ssangeeta * the arp information corresponding to this ire_mp was not 6980c793af95Ssangeeta * transferred to a ire_cache entry. Need 6981c793af95Ssangeeta * to clean up incomplete ire's and nce, if necessary. 6982c793af95Ssangeeta */ 6983c793af95Ssangeeta ASSERT(ire_mp->ire_stq != NULL); 6984c793af95Ssangeeta ASSERT(ire_mp->ire_stq_ifindex != 0); 6985c793af95Ssangeeta /* 6986c793af95Ssangeeta * Get any nce's corresponding to this ire_mp. We first have to 6987c793af95Ssangeeta * make sure that the ill is still around. 6988c793af95Ssangeeta */ 6989c793af95Ssangeeta ill = ill_lookup_on_ifindex(ire_mp->ire_stq_ifindex, B_FALSE, 6990c793af95Ssangeeta NULL, NULL, NULL, NULL); 6991c793af95Ssangeeta if (ill == NULL || (ire_mp->ire_stq != ill->ill_wq) || 6992c793af95Ssangeeta (ill->ill_state_flags & ILL_CONDEMNED)) { 6993c793af95Ssangeeta /* 6994c793af95Ssangeeta * ill went away. no nce to clean up. 6995c793af95Ssangeeta * Note that the ill_state_flags could be set to 6996c793af95Ssangeeta * ILL_CONDEMNED after this point, but if we know 6997c793af95Ssangeeta * that it is CONDEMNED now, we just bail out quickly. 6998c793af95Ssangeeta */ 6999c793af95Ssangeeta if (ill != NULL) 7000c793af95Ssangeeta ill_refrele(ill); 7001c793af95Ssangeeta goto cleanup; 7002c793af95Ssangeeta } 7003c793af95Ssangeeta nce = ndp_lookup_v4(ill, 7004c793af95Ssangeeta ((ire_mp->ire_gateway_addr != INADDR_ANY) ? 7005c793af95Ssangeeta &ire_mp->ire_gateway_addr : &ire_mp->ire_addr), 7006c793af95Ssangeeta B_FALSE); 7007c793af95Ssangeeta ill_refrele(ill); 7008c793af95Ssangeeta 7009c793af95Ssangeeta if ((nce != NULL) && (nce->nce_state != ND_REACHABLE)) { 7010c793af95Ssangeeta /* 7011c793af95Ssangeeta * some incomplete nce was found. 7012c793af95Ssangeeta */ 7013c793af95Ssangeeta DTRACE_PROBE2(ire__freemblk__arp__resolv__fail, 7014c793af95Ssangeeta nce_t *, nce, ire_t *, ire_mp); 7015c793af95Ssangeeta /* 7016c793af95Ssangeeta * Send the icmp_unreachable messages for the queued mblks in 7017c793af95Ssangeeta * ire->ire_nce->nce_qd_mp, since ARP resolution failed 7018c793af95Ssangeeta * for this ire 7019c793af95Ssangeeta */ 7020c793af95Ssangeeta arp_resolv_failed(nce); 7021c793af95Ssangeeta /* 7022c793af95Ssangeeta * Delete the nce and clean up all ire's pointing at this nce 7023c793af95Ssangeeta * in the cachetable 7024c793af95Ssangeeta */ 7025c793af95Ssangeeta ndp_delete(nce); 7026c793af95Ssangeeta } 7027c793af95Ssangeeta if (nce != NULL) 7028c793af95Ssangeeta NCE_REFRELE(nce); /* release the ref taken by ndp_lookup_v4 */ 7029c793af95Ssangeeta 7030c793af95Ssangeeta cleanup: 7031c793af95Ssangeeta /* 7032c793af95Ssangeeta * Get rid of the ire buffer 7033c793af95Ssangeeta * We call kmem_free here(instead of ire_delete()), since 7034c793af95Ssangeeta * this is the freeb's callback. 7035c793af95Ssangeeta */ 7036c793af95Ssangeeta kmem_free(ire_mp, sizeof (ire_t) + sizeof (frtn_t)); 7037c793af95Ssangeeta } 7038c793af95Ssangeeta 7039c793af95Ssangeeta 7040c793af95Ssangeeta /* 7041c793af95Ssangeeta * create the neighbor cache entry nce_t for IRE_CACHE and 7042c793af95Ssangeeta * non-loopback IRE_BROADCAST ire's. Note that IRE_BROADCAST 7043c793af95Ssangeeta * (non-loopback) entries have the nce_res_mp set to the 7044c793af95Ssangeeta * template passed in (generated from ill_bcast_mp); IRE_CACHE ire's 7045c793af95Ssangeeta * contain the information for the nexthop (ire_gateway_addr) in the 7046c793af95Ssangeeta * case of indirect routes, and for the dst itself (ire_addr) in the 7047c793af95Ssangeeta * case of direct routes, with the nce_res_mp containing a template 7048c793af95Ssangeeta * DL_UNITDATA request. 7049c793af95Ssangeeta * 7050c793af95Ssangeeta * This function always consumes res_mp and fp_mp. 7051c793af95Ssangeeta * 7052c793af95Ssangeeta * The actual association of the ire_nce to the nce created here is 7053c793af95Ssangeeta * typically done in ire_add_v4 for IRE_CACHE entries. Exceptions 7054c793af95Ssangeeta * to this rule are SO_DONTROUTE ire's (IRE_MARK_NO_ADD), for which 7055c793af95Ssangeeta * the ire_nce assignment is done in ire_add_then_send, and mobile-ip 7056c793af95Ssangeeta * where the assignment is done in ire_add_mrtun(). 7057c793af95Ssangeeta */ 7058c793af95Ssangeeta int 7059c793af95Ssangeeta ire_nce_init(ire_t *ire, mblk_t *fp_mp, mblk_t *res_mp) 7060c793af95Ssangeeta { 7061c793af95Ssangeeta in_addr_t addr4, mask4; 7062c793af95Ssangeeta int err; 7063c793af95Ssangeeta nce_t *arpce = NULL; 7064c793af95Ssangeeta ill_t *ire_ill; 7065c793af95Ssangeeta uint16_t nce_state, nce_flags; 7066c793af95Ssangeeta 7067c793af95Ssangeeta if (ire->ire_stq == NULL) { 7068c793af95Ssangeeta if (res_mp) 7069c793af95Ssangeeta freemsg(res_mp); 7070c793af95Ssangeeta if (fp_mp) 7071c793af95Ssangeeta freemsg(fp_mp); 7072c793af95Ssangeeta return (0); /* no need to create nce for local/loopback */ 7073c793af95Ssangeeta } 7074c793af95Ssangeeta 7075c793af95Ssangeeta mask4 = IP_HOST_MASK; 7076c793af95Ssangeeta switch (ire->ire_type) { 7077c793af95Ssangeeta case IRE_CACHE: 7078c793af95Ssangeeta if (ire->ire_gateway_addr != INADDR_ANY) 7079c793af95Ssangeeta addr4 = ire->ire_gateway_addr; /* 'G' route */ 7080c793af95Ssangeeta else 7081c793af95Ssangeeta addr4 = ire->ire_addr; /* direct route */ 7082c793af95Ssangeeta break; 7083c793af95Ssangeeta case IRE_BROADCAST: 7084c793af95Ssangeeta addr4 = ire->ire_addr; 7085c793af95Ssangeeta break; 7086c793af95Ssangeeta default: 7087c793af95Ssangeeta if (res_mp) 7088c793af95Ssangeeta freemsg(res_mp); 7089c793af95Ssangeeta if (fp_mp) 7090c793af95Ssangeeta freemsg(fp_mp); 7091c793af95Ssangeeta return (0); 7092c793af95Ssangeeta } 7093c793af95Ssangeeta 7094c793af95Ssangeeta /* 7095c793af95Ssangeeta * ire_ipif is picked based on RTF_SETSRC, usesrc etc. 7096c793af95Ssangeeta * rules in ire_forward_src_ipif. We want the dlureq_mp 7097c793af95Ssangeeta * for the outgoing interface, which we get from the ire_stq. 7098c793af95Ssangeeta */ 7099c793af95Ssangeeta ire_ill = ire_to_ill(ire); 7100c793af95Ssangeeta 7101c793af95Ssangeeta /* 7102c793af95Ssangeeta * if we are creating an nce for the first time, and this is 7103c793af95Ssangeeta * a NORESOLVER interface, atomically create the nce in the 7104c793af95Ssangeeta * REACHABLE state; else create it in the ND_INITIAL state. 7105c793af95Ssangeeta */ 7106c793af95Ssangeeta if (ire_ill->ill_net_type == IRE_IF_NORESOLVER) { 7107c793af95Ssangeeta nce_state = ND_REACHABLE; 7108c793af95Ssangeeta nce_flags = NCE_F_PERMANENT; 7109c793af95Ssangeeta } else { 7110c793af95Ssangeeta if (fp_mp != NULL) 7111c793af95Ssangeeta nce_state = ND_REACHABLE; 7112c793af95Ssangeeta else 7113c793af95Ssangeeta nce_state = ND_INITIAL; 7114c793af95Ssangeeta nce_flags = 0; 7115c793af95Ssangeeta } 7116c793af95Ssangeeta 7117c793af95Ssangeeta err = ndp_lookup_then_add(ire_ill, NULL, 7118c793af95Ssangeeta &addr4, &mask4, NULL, 0, nce_flags, nce_state, &arpce, 7119c793af95Ssangeeta fp_mp, res_mp); 7120c793af95Ssangeeta 7121c793af95Ssangeeta ip1dbg(("ire 0x%p addr 0x%lx mask 0x%lx type 0x%x; " 7122c793af95Ssangeeta "found nce 0x%p err %d\n", (void *)ire, (ulong_t)addr4, 7123c793af95Ssangeeta (ulong_t)mask4, ire->ire_type, (void *)arpce, err)); 7124c793af95Ssangeeta 7125c793af95Ssangeeta switch (err) { 7126c793af95Ssangeeta case 0: 7127c793af95Ssangeeta break; 7128c793af95Ssangeeta case EEXIST: 7129c793af95Ssangeeta /* 7130c793af95Ssangeeta * return a pointer to an existing nce_t; 7131c793af95Ssangeeta * note that the ire-nce mapping is many-one, i.e., 7132c793af95Ssangeeta * multiple ire's could point to the same nce_t; 7133c793af95Ssangeeta */ 7134c793af95Ssangeeta if (fp_mp != NULL) { 7135c793af95Ssangeeta freemsg(fp_mp); 7136c793af95Ssangeeta } 7137c793af95Ssangeeta if (res_mp != NULL) { 7138c793af95Ssangeeta freemsg(res_mp); 7139c793af95Ssangeeta } 7140c793af95Ssangeeta break; 7141c793af95Ssangeeta default: 7142c793af95Ssangeeta DTRACE_PROBE2(nce__init__fail, ill_t *, ire_ill, int, err); 7143c793af95Ssangeeta if (res_mp) 7144c793af95Ssangeeta freemsg(res_mp); 7145c793af95Ssangeeta if (fp_mp) 7146c793af95Ssangeeta freemsg(fp_mp); 7147c793af95Ssangeeta return (EINVAL); 7148c793af95Ssangeeta } 7149c793af95Ssangeeta #if DEBUG 7150c793af95Ssangeeta /* 7151c793af95Ssangeeta * if an nce_fp_mp was passed in, we should be picking up an 7152c793af95Ssangeeta * existing nce_t in the ND_REACHABLE state. 7153c793af95Ssangeeta */ 7154c793af95Ssangeeta mutex_enter(&arpce->nce_lock); 7155c793af95Ssangeeta ASSERT(arpce->nce_fp_mp == NULL || arpce->nce_state == ND_REACHABLE); 7156c793af95Ssangeeta mutex_exit(&arpce->nce_lock); 7157c793af95Ssangeeta #endif 7158c793af95Ssangeeta if (ire->ire_type == IRE_BROADCAST) { 7159c793af95Ssangeeta /* 7160c793af95Ssangeeta * Two bcast ires are created for each interface; 7161c793af95Ssangeeta * 1. loopback copy (which does not have an 7162c793af95Ssangeeta * ire_stq, and therefore has no ire_nce), and, 7163c793af95Ssangeeta * 2. the non-loopback copy, which has the nce_res_mp 7164c793af95Ssangeeta * initialized to a copy of the ill_bcast_mp, and 7165c793af95Ssangeeta * is marked as ND_REACHABLE at this point. 7166c793af95Ssangeeta * This nce does not undergo any further state changes, 7167c793af95Ssangeeta * and exists as long as the interface is plumbed. 7168c793af95Ssangeeta * Note: we do the ire_nce assignment here for IRE_BROADCAST 7169c793af95Ssangeeta * because some functions like ill_mark_bcast() inline the 7170c793af95Ssangeeta * ire_add functionality; 7171c793af95Ssangeeta */ 7172c793af95Ssangeeta mutex_enter(&arpce->nce_lock); 7173c793af95Ssangeeta arpce->nce_state = ND_REACHABLE; 7174c793af95Ssangeeta arpce->nce_flags |= NCE_F_PERMANENT; 7175c793af95Ssangeeta arpce->nce_last = TICK_TO_MSEC(lbolt64); 7176c793af95Ssangeeta ire->ire_nce = arpce; 7177c793af95Ssangeeta mutex_exit(&arpce->nce_lock); 7178c793af95Ssangeeta /* 7179c793af95Ssangeeta * We are associating this nce to the ire, 7180c793af95Ssangeeta * so change the nce ref taken in 7181c793af95Ssangeeta * ndp_lookup_then_add_v4() from 7182c793af95Ssangeeta * NCE_REFHOLD to NCE_REFHOLD_NOTR 7183c793af95Ssangeeta */ 7184c793af95Ssangeeta NCE_REFHOLD_TO_REFHOLD_NOTR(ire->ire_nce); 7185c793af95Ssangeeta } else { 7186c793af95Ssangeeta if (NCE_EXPIRED(arpce)) 7187c793af95Ssangeeta arpce = nce_reinit(arpce); 7188c793af95Ssangeeta if (arpce != NULL) { 7189c793af95Ssangeeta /* 7190c793af95Ssangeeta * We are not using this nce_t just yet so release 7191c793af95Ssangeeta * the ref taken in ndp_lookup_then_add_v4() 7192c793af95Ssangeeta */ 7193c793af95Ssangeeta NCE_REFRELE(arpce); 7194c793af95Ssangeeta } else { 7195c793af95Ssangeeta ip0dbg(("can't reinit arpce for ill 0x%p;\n", 7196c793af95Ssangeeta (void *)ire_ill)); 7197c793af95Ssangeeta } 7198c793af95Ssangeeta } 7199c793af95Ssangeeta return (0); 7200c793af95Ssangeeta } 7201