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 /* 22107875b0Ssangeeta * Copyright 2007 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> 377c478bd9Sstevel@tonic-gate #include <sys/ddi.h> 387c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h> 397c478bd9Sstevel@tonic-gate #include <sys/policy.h> 407c478bd9Sstevel@tonic-gate 417c478bd9Sstevel@tonic-gate #include <sys/systm.h> 427c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 437c478bd9Sstevel@tonic-gate #include <sys/param.h> 447c478bd9Sstevel@tonic-gate #include <sys/socket.h> 457c478bd9Sstevel@tonic-gate #include <net/if.h> 467c478bd9Sstevel@tonic-gate #include <net/route.h> 477c478bd9Sstevel@tonic-gate #include <netinet/in.h> 487c478bd9Sstevel@tonic-gate #include <net/if_dl.h> 497c478bd9Sstevel@tonic-gate #include <netinet/ip6.h> 507c478bd9Sstevel@tonic-gate #include <netinet/icmp6.h> 517c478bd9Sstevel@tonic-gate 527c478bd9Sstevel@tonic-gate #include <inet/common.h> 537c478bd9Sstevel@tonic-gate #include <inet/mi.h> 547c478bd9Sstevel@tonic-gate #include <inet/ip.h> 557c478bd9Sstevel@tonic-gate #include <inet/ip6.h> 567c478bd9Sstevel@tonic-gate #include <inet/ip_ndp.h> 57c793af95Ssangeeta #include <inet/arp.h> 587c478bd9Sstevel@tonic-gate #include <inet/ip_if.h> 597c478bd9Sstevel@tonic-gate #include <inet/ip_ire.h> 60c793af95Ssangeeta #include <inet/ip_ftable.h> 617c478bd9Sstevel@tonic-gate #include <inet/ip_rts.h> 627c478bd9Sstevel@tonic-gate #include <inet/nd.h> 637c478bd9Sstevel@tonic-gate 647c478bd9Sstevel@tonic-gate #include <net/pfkeyv2.h> 657c478bd9Sstevel@tonic-gate #include <inet/ipsec_info.h> 667c478bd9Sstevel@tonic-gate #include <inet/sadb.h> 677c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 687c478bd9Sstevel@tonic-gate #include <inet/tcp.h> 697c478bd9Sstevel@tonic-gate #include <inet/ipclassifier.h> 707c478bd9Sstevel@tonic-gate #include <sys/zone.h> 71f4b3ec61Sdh155122 #include <sys/cpuvar.h> 72f4b3ec61Sdh155122 7345916cd2Sjpk #include <sys/tsol/label.h> 7445916cd2Sjpk #include <sys/tsol/tnet.h> 7545916cd2Sjpk 76c793af95Ssangeeta struct kmem_cache *rt_entry_cache; 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 149f4b3ec61Sdh155122 * structure. ip_forwarding_table_v6 is allocated dynamically in 150f4b3ec61Sdh155122 * ire_add_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 152f4b3ec61Sdh155122 * de-alloacted. This assumption enables us to access 153f4b3ec61Sdh155122 * 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], 1865c0b7edeSseb * ipif_to_ire[_v6]. 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 /* 2357c478bd9Sstevel@tonic-gate * The minimum size of IRE cache table. It will be recalcuated in 2367c478bd9Sstevel@tonic-gate * ip_ire_init(). 237f4b3ec61Sdh155122 * Setable in /etc/system 2387c478bd9Sstevel@tonic-gate */ 2397c478bd9Sstevel@tonic-gate uint32_t ip_cache_table_size = IP_CACHE_TABLE_SIZE; 2407c478bd9Sstevel@tonic-gate uint32_t ip6_cache_table_size = IP6_CACHE_TABLE_SIZE; 2417c478bd9Sstevel@tonic-gate 2427c478bd9Sstevel@tonic-gate /* 2437c478bd9Sstevel@tonic-gate * The size of the forwarding table. We will make sure that it is a 2447c478bd9Sstevel@tonic-gate * power of 2 in ip_ire_init(). 245f4b3ec61Sdh155122 * Setable in /etc/system 2467c478bd9Sstevel@tonic-gate */ 2477c478bd9Sstevel@tonic-gate uint32_t ip6_ftable_hash_size = IP6_FTABLE_HASH_SIZE; 2487c478bd9Sstevel@tonic-gate 2497c478bd9Sstevel@tonic-gate struct kmem_cache *ire_cache; 2507c478bd9Sstevel@tonic-gate static ire_t ire_null; 2517c478bd9Sstevel@tonic-gate 2527c478bd9Sstevel@tonic-gate /* 2537c478bd9Sstevel@tonic-gate * The threshold number of IRE in a bucket when the IREs are 2547c478bd9Sstevel@tonic-gate * cleaned up. This threshold is calculated later in ip_open() 2557c478bd9Sstevel@tonic-gate * based on the speed of CPU and available memory. This default 2567c478bd9Sstevel@tonic-gate * value is the maximum. 2577c478bd9Sstevel@tonic-gate * 2587c478bd9Sstevel@tonic-gate * We have two kinds of cached IRE, temporary and 2597c478bd9Sstevel@tonic-gate * non-temporary. Temporary IREs are marked with 2607c478bd9Sstevel@tonic-gate * IRE_MARK_TEMPORARY. They are IREs created for non 2617c478bd9Sstevel@tonic-gate * TCP traffic and for forwarding purposes. All others 2627c478bd9Sstevel@tonic-gate * are non-temporary IREs. We don't mark IRE created for 2637c478bd9Sstevel@tonic-gate * TCP as temporary because TCP is stateful and there are 2647c478bd9Sstevel@tonic-gate * info stored in the IRE which can be shared by other TCP 2657c478bd9Sstevel@tonic-gate * connections to the same destination. For connected 2667c478bd9Sstevel@tonic-gate * endpoint, we also don't want to mark the IRE used as 2677c478bd9Sstevel@tonic-gate * temporary because the same IRE will be used frequently, 2687c478bd9Sstevel@tonic-gate * otherwise, the app should not do a connect(). We change 2697c478bd9Sstevel@tonic-gate * the marking at ip_bind_connected_*() if necessary. 2707c478bd9Sstevel@tonic-gate * 2717c478bd9Sstevel@tonic-gate * We want to keep the cache IRE hash bucket length reasonably 2727c478bd9Sstevel@tonic-gate * short, otherwise IRE lookup functions will take "forever." 2737c478bd9Sstevel@tonic-gate * We use the "crude" function that the IRE bucket 2747c478bd9Sstevel@tonic-gate * length should be based on the CPU speed, which is 1 entry 2757c478bd9Sstevel@tonic-gate * per x MHz, depending on the shift factor ip_ire_cpu_ratio 2767c478bd9Sstevel@tonic-gate * (n). This means that with a 750MHz CPU, the max bucket 2777c478bd9Sstevel@tonic-gate * length can be (750 >> n) entries. 2787c478bd9Sstevel@tonic-gate * 2797c478bd9Sstevel@tonic-gate * Note that this threshold is separate for temp and non-temp 2807c478bd9Sstevel@tonic-gate * IREs. This means that the actual bucket length can be 2817c478bd9Sstevel@tonic-gate * twice as that. And while we try to keep temporary IRE 2827c478bd9Sstevel@tonic-gate * length at most at the threshold value, we do not attempt to 2837c478bd9Sstevel@tonic-gate * make the length for non-temporary IREs fixed, for the 2847c478bd9Sstevel@tonic-gate * reason stated above. Instead, we start trying to find 2857c478bd9Sstevel@tonic-gate * "unused" non-temporary IREs when the bucket length reaches 2867c478bd9Sstevel@tonic-gate * this threshold and clean them up. 2877c478bd9Sstevel@tonic-gate * 2887c478bd9Sstevel@tonic-gate * We also want to limit the amount of memory used by 2897c478bd9Sstevel@tonic-gate * IREs. So if we are allowed to use ~3% of memory (M) 2907c478bd9Sstevel@tonic-gate * for those IREs, each bucket should not have more than 2917c478bd9Sstevel@tonic-gate * 2927c478bd9Sstevel@tonic-gate * M / num of cache bucket / sizeof (ire_t) 2937c478bd9Sstevel@tonic-gate * 2947c478bd9Sstevel@tonic-gate * Again the above memory uses are separate for temp and 2957c478bd9Sstevel@tonic-gate * non-temp cached IREs. 2967c478bd9Sstevel@tonic-gate * 2977c478bd9Sstevel@tonic-gate * We may also want the limit to be a function of the number 2987c478bd9Sstevel@tonic-gate * of interfaces and number of CPUs. Doing the initialization 2997c478bd9Sstevel@tonic-gate * in ip_open() means that every time an interface is plumbed, 3007c478bd9Sstevel@tonic-gate * the max is re-calculated. Right now, we don't do anything 3017c478bd9Sstevel@tonic-gate * different. In future, when we have more experience, we 3027c478bd9Sstevel@tonic-gate * may want to change this behavior. 3037c478bd9Sstevel@tonic-gate */ 304f4b3ec61Sdh155122 uint32_t ip_ire_max_bucket_cnt = 10; /* Setable in /etc/system */ 3057c478bd9Sstevel@tonic-gate uint32_t ip6_ire_max_bucket_cnt = 10; 3067c478bd9Sstevel@tonic-gate 3077c478bd9Sstevel@tonic-gate /* 3087c478bd9Sstevel@tonic-gate * The minimum of the temporary IRE bucket count. We do not want 3097c478bd9Sstevel@tonic-gate * the length of each bucket to be too short. This may hurt 3107c478bd9Sstevel@tonic-gate * performance of some apps as the temporary IREs are removed too 3117c478bd9Sstevel@tonic-gate * often. 3127c478bd9Sstevel@tonic-gate */ 313f4b3ec61Sdh155122 uint32_t ip_ire_min_bucket_cnt = 3; /* /etc/system - not used */ 3147c478bd9Sstevel@tonic-gate uint32_t ip6_ire_min_bucket_cnt = 3; 3157c478bd9Sstevel@tonic-gate 3167c478bd9Sstevel@tonic-gate /* 3177c478bd9Sstevel@tonic-gate * The ratio of memory consumed by IRE used for temporary to available 3187c478bd9Sstevel@tonic-gate * memory. This is a shift factor, so 6 means the ratio 1 to 64. This 3197c478bd9Sstevel@tonic-gate * value can be changed in /etc/system. 6 is a reasonable number. 3207c478bd9Sstevel@tonic-gate */ 321f4b3ec61Sdh155122 uint32_t ip_ire_mem_ratio = 6; /* /etc/system */ 3227c478bd9Sstevel@tonic-gate /* The shift factor for CPU speed to calculate the max IRE bucket length. */ 323f4b3ec61Sdh155122 uint32_t ip_ire_cpu_ratio = 7; /* /etc/system */ 3247c478bd9Sstevel@tonic-gate 325c793af95Ssangeeta typedef struct nce_clookup_s { 326c793af95Ssangeeta ipaddr_t ncecl_addr; 327c793af95Ssangeeta boolean_t ncecl_found; 328c793af95Ssangeeta } nce_clookup_t; 329c793af95Ssangeeta 3307c478bd9Sstevel@tonic-gate /* 3317c478bd9Sstevel@tonic-gate * The maximum number of buckets in IRE cache table. In future, we may 3327c478bd9Sstevel@tonic-gate * want to make it a dynamic hash table. For the moment, we fix the 3337c478bd9Sstevel@tonic-gate * size and allocate the table in ip_ire_init() when IP is first loaded. 3347c478bd9Sstevel@tonic-gate * We take into account the amount of memory a system has. 3357c478bd9Sstevel@tonic-gate */ 3367c478bd9Sstevel@tonic-gate #define IP_MAX_CACHE_TABLE_SIZE 4096 3377c478bd9Sstevel@tonic-gate 338f4b3ec61Sdh155122 /* Setable in /etc/system */ 3397c478bd9Sstevel@tonic-gate static uint32_t ip_max_cache_table_size = IP_MAX_CACHE_TABLE_SIZE; 3407c478bd9Sstevel@tonic-gate static uint32_t ip6_max_cache_table_size = IP_MAX_CACHE_TABLE_SIZE; 3417c478bd9Sstevel@tonic-gate 3425c0b7edeSseb #define NUM_ILLS 2 /* To build the ILL list to unlock */ 3437c478bd9Sstevel@tonic-gate 3447c478bd9Sstevel@tonic-gate /* Zero iulp_t for initialization. */ 3457c478bd9Sstevel@tonic-gate const iulp_t ire_uinfo_null = { 0 }; 3467c478bd9Sstevel@tonic-gate 3477c478bd9Sstevel@tonic-gate static int ire_add_v4(ire_t **ire_p, queue_t *q, mblk_t *mp, 348c793af95Ssangeeta ipsq_func_t func, boolean_t); 3497c478bd9Sstevel@tonic-gate static void ire_delete_v4(ire_t *ire); 3507c478bd9Sstevel@tonic-gate static void ire_report_ctable(ire_t *ire, char *mp); 35145916cd2Sjpk static void ire_walk_ipvers(pfv_t func, void *arg, uchar_t vers, 352f4b3ec61Sdh155122 zoneid_t zoneid, ip_stack_t *); 3537c478bd9Sstevel@tonic-gate static void ire_walk_ill_ipvers(uint_t match_flags, uint_t ire_type, 35445916cd2Sjpk pfv_t func, void *arg, uchar_t vers, ill_t *ill); 3557c478bd9Sstevel@tonic-gate static void ire_cache_cleanup(irb_t *irb, uint32_t threshold, int cnt); 356c793af95Ssangeeta static void ip_nce_clookup_and_delete(nce_t *nce, void *arg); 357*6a8288c7Scarlsonj #ifdef DEBUG 358*6a8288c7Scarlsonj static void ire_trace_cleanup(const ire_t *); 3597c478bd9Sstevel@tonic-gate #endif 3607c478bd9Sstevel@tonic-gate 3617c478bd9Sstevel@tonic-gate /* 3627c478bd9Sstevel@tonic-gate * To avoid bloating the code, we call this function instead of 3637c478bd9Sstevel@tonic-gate * using the macro IRE_REFRELE. Use macro only in performance 3647c478bd9Sstevel@tonic-gate * critical paths. 3657c478bd9Sstevel@tonic-gate * 3667c478bd9Sstevel@tonic-gate * Must not be called while holding any locks. Otherwise if this is 3677c478bd9Sstevel@tonic-gate * the last reference to be released there is a chance of recursive mutex 3687c478bd9Sstevel@tonic-gate * panic due to ire_refrele -> ipif_ill_refrele_tail -> qwriter_ip trying 3697c478bd9Sstevel@tonic-gate * to restart an ioctl. The one exception is when the caller is sure that 3707c478bd9Sstevel@tonic-gate * this is not the last reference to be released. Eg. if the caller is 3717c478bd9Sstevel@tonic-gate * sure that the ire has not been deleted and won't be deleted. 3727c478bd9Sstevel@tonic-gate */ 3737c478bd9Sstevel@tonic-gate void 3747c478bd9Sstevel@tonic-gate ire_refrele(ire_t *ire) 3757c478bd9Sstevel@tonic-gate { 3767c478bd9Sstevel@tonic-gate IRE_REFRELE(ire); 3777c478bd9Sstevel@tonic-gate } 3787c478bd9Sstevel@tonic-gate 3797c478bd9Sstevel@tonic-gate void 3807c478bd9Sstevel@tonic-gate ire_refrele_notr(ire_t *ire) 3817c478bd9Sstevel@tonic-gate { 3827c478bd9Sstevel@tonic-gate IRE_REFRELE_NOTR(ire); 3837c478bd9Sstevel@tonic-gate } 3847c478bd9Sstevel@tonic-gate 3857c478bd9Sstevel@tonic-gate /* 3867c478bd9Sstevel@tonic-gate * kmem_cache_alloc constructor for IRE in kma space. 3877c478bd9Sstevel@tonic-gate * Note that when ire_mp is set the IRE is stored in that mblk and 3887c478bd9Sstevel@tonic-gate * not in this cache. 3897c478bd9Sstevel@tonic-gate */ 3907c478bd9Sstevel@tonic-gate /* ARGSUSED */ 3917c478bd9Sstevel@tonic-gate static int 3927c478bd9Sstevel@tonic-gate ip_ire_constructor(void *buf, void *cdrarg, int kmflags) 3937c478bd9Sstevel@tonic-gate { 3947c478bd9Sstevel@tonic-gate ire_t *ire = buf; 3957c478bd9Sstevel@tonic-gate 396c793af95Ssangeeta ire->ire_nce = NULL; 3977c478bd9Sstevel@tonic-gate 3987c478bd9Sstevel@tonic-gate return (0); 3997c478bd9Sstevel@tonic-gate } 4007c478bd9Sstevel@tonic-gate 4017c478bd9Sstevel@tonic-gate /* ARGSUSED1 */ 4027c478bd9Sstevel@tonic-gate static void 4037c478bd9Sstevel@tonic-gate ip_ire_destructor(void *buf, void *cdrarg) 4047c478bd9Sstevel@tonic-gate { 4057c478bd9Sstevel@tonic-gate ire_t *ire = buf; 4067c478bd9Sstevel@tonic-gate 407c793af95Ssangeeta ASSERT(ire->ire_nce == NULL); 4087c478bd9Sstevel@tonic-gate } 4097c478bd9Sstevel@tonic-gate 4107c478bd9Sstevel@tonic-gate /* 4117c478bd9Sstevel@tonic-gate * This function is associated with the IP_IOC_IRE_ADVISE_NO_REPLY 4127c478bd9Sstevel@tonic-gate * IOCTL. It is used by TCP (or other ULPs) to supply revised information 4137c478bd9Sstevel@tonic-gate * for an existing CACHED IRE. 4147c478bd9Sstevel@tonic-gate */ 4157c478bd9Sstevel@tonic-gate /* ARGSUSED */ 4167c478bd9Sstevel@tonic-gate int 4177c478bd9Sstevel@tonic-gate ip_ire_advise(queue_t *q, mblk_t *mp, cred_t *ioc_cr) 4187c478bd9Sstevel@tonic-gate { 4197c478bd9Sstevel@tonic-gate uchar_t *addr_ucp; 4207c478bd9Sstevel@tonic-gate ipic_t *ipic; 4217c478bd9Sstevel@tonic-gate ire_t *ire; 4227c478bd9Sstevel@tonic-gate ipaddr_t addr; 4237c478bd9Sstevel@tonic-gate in6_addr_t v6addr; 4247c478bd9Sstevel@tonic-gate irb_t *irb; 4257c478bd9Sstevel@tonic-gate zoneid_t zoneid; 426f4b3ec61Sdh155122 ip_stack_t *ipst = CONNQ_TO_IPST(q); 4277c478bd9Sstevel@tonic-gate 4287c478bd9Sstevel@tonic-gate ASSERT(q->q_next == NULL); 4297c478bd9Sstevel@tonic-gate zoneid = Q_TO_CONN(q)->conn_zoneid; 4307c478bd9Sstevel@tonic-gate 4317c478bd9Sstevel@tonic-gate /* 4327c478bd9Sstevel@tonic-gate * Check privilege using the ioctl credential; if it is NULL 4337c478bd9Sstevel@tonic-gate * then this is a kernel message and therefor privileged. 4347c478bd9Sstevel@tonic-gate */ 435f4b3ec61Sdh155122 if (ioc_cr != NULL && secpolicy_ip_config(ioc_cr, B_FALSE) != 0) 4367c478bd9Sstevel@tonic-gate return (EPERM); 4377c478bd9Sstevel@tonic-gate 4387c478bd9Sstevel@tonic-gate ipic = (ipic_t *)mp->b_rptr; 4397c478bd9Sstevel@tonic-gate if (!(addr_ucp = mi_offset_param(mp, ipic->ipic_addr_offset, 4407c478bd9Sstevel@tonic-gate ipic->ipic_addr_length))) { 4417c478bd9Sstevel@tonic-gate return (EINVAL); 4427c478bd9Sstevel@tonic-gate } 4437c478bd9Sstevel@tonic-gate if (!OK_32PTR(addr_ucp)) 4447c478bd9Sstevel@tonic-gate return (EINVAL); 4457c478bd9Sstevel@tonic-gate switch (ipic->ipic_addr_length) { 4467c478bd9Sstevel@tonic-gate case IP_ADDR_LEN: { 4477c478bd9Sstevel@tonic-gate /* Extract the destination address. */ 4487c478bd9Sstevel@tonic-gate addr = *(ipaddr_t *)addr_ucp; 4497c478bd9Sstevel@tonic-gate /* Find the corresponding IRE. */ 450f4b3ec61Sdh155122 ire = ire_cache_lookup(addr, zoneid, NULL, ipst); 4517c478bd9Sstevel@tonic-gate break; 4527c478bd9Sstevel@tonic-gate } 4537c478bd9Sstevel@tonic-gate case IPV6_ADDR_LEN: { 4547c478bd9Sstevel@tonic-gate /* Extract the destination address. */ 4557c478bd9Sstevel@tonic-gate v6addr = *(in6_addr_t *)addr_ucp; 4567c478bd9Sstevel@tonic-gate /* Find the corresponding IRE. */ 457f4b3ec61Sdh155122 ire = ire_cache_lookup_v6(&v6addr, zoneid, NULL, ipst); 4587c478bd9Sstevel@tonic-gate break; 4597c478bd9Sstevel@tonic-gate } 4607c478bd9Sstevel@tonic-gate default: 4617c478bd9Sstevel@tonic-gate return (EINVAL); 4627c478bd9Sstevel@tonic-gate } 4637c478bd9Sstevel@tonic-gate 4647c478bd9Sstevel@tonic-gate if (ire == NULL) 4657c478bd9Sstevel@tonic-gate return (ENOENT); 4667c478bd9Sstevel@tonic-gate /* 4677c478bd9Sstevel@tonic-gate * Update the round trip time estimate and/or the max frag size 4687c478bd9Sstevel@tonic-gate * and/or the slow start threshold. 4697c478bd9Sstevel@tonic-gate * 4707c478bd9Sstevel@tonic-gate * We serialize multiple advises using ire_lock. 4717c478bd9Sstevel@tonic-gate */ 4727c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 4737c478bd9Sstevel@tonic-gate if (ipic->ipic_rtt) { 4747c478bd9Sstevel@tonic-gate /* 4757c478bd9Sstevel@tonic-gate * If there is no old cached values, initialize them 4767c478bd9Sstevel@tonic-gate * conservatively. Set them to be (1.5 * new value). 4777c478bd9Sstevel@tonic-gate */ 4787c478bd9Sstevel@tonic-gate if (ire->ire_uinfo.iulp_rtt != 0) { 4797c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtt = (ire->ire_uinfo.iulp_rtt + 4807c478bd9Sstevel@tonic-gate ipic->ipic_rtt) >> 1; 4817c478bd9Sstevel@tonic-gate } else { 4827c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtt = ipic->ipic_rtt + 4837c478bd9Sstevel@tonic-gate (ipic->ipic_rtt >> 1); 4847c478bd9Sstevel@tonic-gate } 4857c478bd9Sstevel@tonic-gate if (ire->ire_uinfo.iulp_rtt_sd != 0) { 4867c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtt_sd = 4877c478bd9Sstevel@tonic-gate (ire->ire_uinfo.iulp_rtt_sd + 4887c478bd9Sstevel@tonic-gate ipic->ipic_rtt_sd) >> 1; 4897c478bd9Sstevel@tonic-gate } else { 4907c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtt_sd = ipic->ipic_rtt_sd + 4917c478bd9Sstevel@tonic-gate (ipic->ipic_rtt_sd >> 1); 4927c478bd9Sstevel@tonic-gate } 4937c478bd9Sstevel@tonic-gate } 4947c478bd9Sstevel@tonic-gate if (ipic->ipic_max_frag) 4957c478bd9Sstevel@tonic-gate ire->ire_max_frag = MIN(ipic->ipic_max_frag, IP_MAXPACKET); 4967c478bd9Sstevel@tonic-gate if (ipic->ipic_ssthresh != 0) { 4977c478bd9Sstevel@tonic-gate if (ire->ire_uinfo.iulp_ssthresh != 0) 4987c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_ssthresh = 4997c478bd9Sstevel@tonic-gate (ipic->ipic_ssthresh + 5007c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_ssthresh) >> 1; 5017c478bd9Sstevel@tonic-gate else 5027c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_ssthresh = ipic->ipic_ssthresh; 5037c478bd9Sstevel@tonic-gate } 5047c478bd9Sstevel@tonic-gate /* 5057c478bd9Sstevel@tonic-gate * Don't need the ire_lock below this. ire_type does not change 5067c478bd9Sstevel@tonic-gate * after initialization. ire_marks is protected by irb_lock. 5077c478bd9Sstevel@tonic-gate */ 5087c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 5097c478bd9Sstevel@tonic-gate 5107c478bd9Sstevel@tonic-gate if (ipic->ipic_ire_marks != 0 && ire->ire_type == IRE_CACHE) { 5117c478bd9Sstevel@tonic-gate /* 5127c478bd9Sstevel@tonic-gate * Only increment the temporary IRE count if the original 5137c478bd9Sstevel@tonic-gate * IRE is not already marked temporary. 5147c478bd9Sstevel@tonic-gate */ 5157c478bd9Sstevel@tonic-gate irb = ire->ire_bucket; 5167c478bd9Sstevel@tonic-gate rw_enter(&irb->irb_lock, RW_WRITER); 5177c478bd9Sstevel@tonic-gate if ((ipic->ipic_ire_marks & IRE_MARK_TEMPORARY) && 5187c478bd9Sstevel@tonic-gate !(ire->ire_marks & IRE_MARK_TEMPORARY)) { 5197c478bd9Sstevel@tonic-gate irb->irb_tmp_ire_cnt++; 5207c478bd9Sstevel@tonic-gate } 5217c478bd9Sstevel@tonic-gate ire->ire_marks |= ipic->ipic_ire_marks; 5227c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 5237c478bd9Sstevel@tonic-gate } 5247c478bd9Sstevel@tonic-gate 5257c478bd9Sstevel@tonic-gate ire_refrele(ire); 5267c478bd9Sstevel@tonic-gate return (0); 5277c478bd9Sstevel@tonic-gate } 5287c478bd9Sstevel@tonic-gate 5297c478bd9Sstevel@tonic-gate /* 5307c478bd9Sstevel@tonic-gate * This function is associated with the IP_IOC_IRE_DELETE[_NO_REPLY] 5317c478bd9Sstevel@tonic-gate * IOCTL[s]. The NO_REPLY form is used by TCP to delete a route IRE 5327c478bd9Sstevel@tonic-gate * for a host that is not responding. This will force an attempt to 533dc041e83Scarlsonj * establish a new route, if available, and flush out the ARP entry so 534dc041e83Scarlsonj * it will re-resolve. Management processes may want to use the 535dc041e83Scarlsonj * version that generates a reply. 5367c478bd9Sstevel@tonic-gate * 5377c478bd9Sstevel@tonic-gate * This function does not support IPv6 since Neighbor Unreachability Detection 5387c478bd9Sstevel@tonic-gate * means that negative advise like this is useless. 5397c478bd9Sstevel@tonic-gate */ 5407c478bd9Sstevel@tonic-gate /* ARGSUSED */ 5417c478bd9Sstevel@tonic-gate int 5427c478bd9Sstevel@tonic-gate ip_ire_delete(queue_t *q, mblk_t *mp, cred_t *ioc_cr) 5437c478bd9Sstevel@tonic-gate { 5447c478bd9Sstevel@tonic-gate uchar_t *addr_ucp; 5457c478bd9Sstevel@tonic-gate ipaddr_t addr; 5467c478bd9Sstevel@tonic-gate ire_t *ire; 5477c478bd9Sstevel@tonic-gate ipid_t *ipid; 5487c478bd9Sstevel@tonic-gate boolean_t routing_sock_info = B_FALSE; /* Sent info? */ 5497c478bd9Sstevel@tonic-gate zoneid_t zoneid; 550c793af95Ssangeeta ire_t *gire = NULL; 551dc041e83Scarlsonj ill_t *ill; 552dc041e83Scarlsonj mblk_t *arp_mp; 553f4b3ec61Sdh155122 ip_stack_t *ipst; 5547c478bd9Sstevel@tonic-gate 5557c478bd9Sstevel@tonic-gate ASSERT(q->q_next == NULL); 5567c478bd9Sstevel@tonic-gate zoneid = Q_TO_CONN(q)->conn_zoneid; 557f4b3ec61Sdh155122 ipst = CONNQ_TO_IPST(q); 5587c478bd9Sstevel@tonic-gate 5597c478bd9Sstevel@tonic-gate /* 5607c478bd9Sstevel@tonic-gate * Check privilege using the ioctl credential; if it is NULL 5617c478bd9Sstevel@tonic-gate * then this is a kernel message and therefor privileged. 5627c478bd9Sstevel@tonic-gate */ 563f4b3ec61Sdh155122 if (ioc_cr != NULL && secpolicy_ip_config(ioc_cr, B_FALSE) != 0) 5647c478bd9Sstevel@tonic-gate return (EPERM); 5657c478bd9Sstevel@tonic-gate 5667c478bd9Sstevel@tonic-gate ipid = (ipid_t *)mp->b_rptr; 5677c478bd9Sstevel@tonic-gate 5687c478bd9Sstevel@tonic-gate /* Only actions on IRE_CACHEs are acceptable at present. */ 5697c478bd9Sstevel@tonic-gate if (ipid->ipid_ire_type != IRE_CACHE) 5707c478bd9Sstevel@tonic-gate return (EINVAL); 5717c478bd9Sstevel@tonic-gate 5727c478bd9Sstevel@tonic-gate addr_ucp = mi_offset_param(mp, ipid->ipid_addr_offset, 5737c478bd9Sstevel@tonic-gate ipid->ipid_addr_length); 5747c478bd9Sstevel@tonic-gate if (addr_ucp == NULL || !OK_32PTR(addr_ucp)) 5757c478bd9Sstevel@tonic-gate return (EINVAL); 5767c478bd9Sstevel@tonic-gate switch (ipid->ipid_addr_length) { 5777c478bd9Sstevel@tonic-gate case IP_ADDR_LEN: 5787c478bd9Sstevel@tonic-gate /* addr_ucp points at IP addr */ 5797c478bd9Sstevel@tonic-gate break; 5807c478bd9Sstevel@tonic-gate case sizeof (sin_t): { 5817c478bd9Sstevel@tonic-gate sin_t *sin; 5827c478bd9Sstevel@tonic-gate /* 5837c478bd9Sstevel@tonic-gate * got complete (sockaddr) address - increment addr_ucp to point 5847c478bd9Sstevel@tonic-gate * at the ip_addr field. 5857c478bd9Sstevel@tonic-gate */ 5867c478bd9Sstevel@tonic-gate sin = (sin_t *)addr_ucp; 5877c478bd9Sstevel@tonic-gate addr_ucp = (uchar_t *)&sin->sin_addr.s_addr; 5887c478bd9Sstevel@tonic-gate break; 5897c478bd9Sstevel@tonic-gate } 5907c478bd9Sstevel@tonic-gate default: 5917c478bd9Sstevel@tonic-gate return (EINVAL); 5927c478bd9Sstevel@tonic-gate } 5937c478bd9Sstevel@tonic-gate /* Extract the destination address. */ 5947c478bd9Sstevel@tonic-gate bcopy(addr_ucp, &addr, IP_ADDR_LEN); 5957c478bd9Sstevel@tonic-gate 5967c478bd9Sstevel@tonic-gate /* Try to find the CACHED IRE. */ 597f4b3ec61Sdh155122 ire = ire_cache_lookup(addr, zoneid, NULL, ipst); 5987c478bd9Sstevel@tonic-gate 5997c478bd9Sstevel@tonic-gate /* Nail it. */ 6007c478bd9Sstevel@tonic-gate if (ire) { 6017c478bd9Sstevel@tonic-gate /* Allow delete only on CACHE entries */ 6027c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) { 6037c478bd9Sstevel@tonic-gate ire_refrele(ire); 6047c478bd9Sstevel@tonic-gate return (EINVAL); 6057c478bd9Sstevel@tonic-gate } 6067c478bd9Sstevel@tonic-gate 6077c478bd9Sstevel@tonic-gate /* 6087c478bd9Sstevel@tonic-gate * Verify that the IRE has been around for a while. 6097c478bd9Sstevel@tonic-gate * This is to protect against transport protocols 6107c478bd9Sstevel@tonic-gate * that are too eager in sending delete messages. 6117c478bd9Sstevel@tonic-gate */ 6127c478bd9Sstevel@tonic-gate if (gethrestime_sec() < 613f4b3ec61Sdh155122 ire->ire_create_time + ipst->ips_ip_ignore_delete_time) { 6147c478bd9Sstevel@tonic-gate ire_refrele(ire); 6157c478bd9Sstevel@tonic-gate return (EINVAL); 6167c478bd9Sstevel@tonic-gate } 6177c478bd9Sstevel@tonic-gate /* 6187c478bd9Sstevel@tonic-gate * Now we have a potentially dead cache entry. We need 6197c478bd9Sstevel@tonic-gate * to remove it. 620c793af95Ssangeeta * If this cache entry is generated from a 621c793af95Ssangeeta * default route (i.e., ire_cmask == 0), 6227c478bd9Sstevel@tonic-gate * search the default list and mark it dead and some 6237c478bd9Sstevel@tonic-gate * background process will try to activate it. 6247c478bd9Sstevel@tonic-gate */ 6257c478bd9Sstevel@tonic-gate if ((ire->ire_gateway_addr != 0) && (ire->ire_cmask == 0)) { 6267c478bd9Sstevel@tonic-gate /* 6277c478bd9Sstevel@tonic-gate * Make sure that we pick a different 6287c478bd9Sstevel@tonic-gate * IRE_DEFAULT next time. 6297c478bd9Sstevel@tonic-gate */ 6307c478bd9Sstevel@tonic-gate ire_t *gw_ire; 631c793af95Ssangeeta irb_t *irb = NULL; 632c793af95Ssangeeta uint_t match_flags; 6337c478bd9Sstevel@tonic-gate 634c793af95Ssangeeta match_flags = (MATCH_IRE_DEFAULT | MATCH_IRE_RJ_BHOLE); 635c793af95Ssangeeta 636c793af95Ssangeeta gire = ire_ftable_lookup(ire->ire_addr, 637c793af95Ssangeeta ire->ire_cmask, 0, 0, 638f4b3ec61Sdh155122 ire->ire_ipif, NULL, zoneid, 0, NULL, match_flags, 639f4b3ec61Sdh155122 ipst); 640c793af95Ssangeeta 641c793af95Ssangeeta ip3dbg(("ire_ftable_lookup() returned gire %p\n", 642c793af95Ssangeeta (void *)gire)); 643c793af95Ssangeeta 644c793af95Ssangeeta if (gire != NULL) { 645c793af95Ssangeeta irb = gire->ire_bucket; 6467c478bd9Sstevel@tonic-gate 6477c478bd9Sstevel@tonic-gate /* 6487c478bd9Sstevel@tonic-gate * We grab it as writer just to serialize 6497c478bd9Sstevel@tonic-gate * multiple threads trying to bump up 650c793af95Ssangeeta * irb_rr_origin 6517c478bd9Sstevel@tonic-gate */ 6527c478bd9Sstevel@tonic-gate rw_enter(&irb->irb_lock, RW_WRITER); 653c793af95Ssangeeta if ((gw_ire = irb->irb_rr_origin) == NULL) { 6547c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 6557c478bd9Sstevel@tonic-gate goto done; 6567c478bd9Sstevel@tonic-gate } 657c793af95Ssangeeta 6580ad1ccddSsowmini DTRACE_PROBE1(ip__ire__del__origin, 6590ad1ccddSsowmini (ire_t *), gw_ire); 6607c478bd9Sstevel@tonic-gate 6617c478bd9Sstevel@tonic-gate /* Skip past the potentially bad gateway */ 6627c478bd9Sstevel@tonic-gate if (ire->ire_gateway_addr == 6630ad1ccddSsowmini gw_ire->ire_gateway_addr) { 6640ad1ccddSsowmini ire_t *next = gw_ire->ire_next; 6657c478bd9Sstevel@tonic-gate 6660ad1ccddSsowmini DTRACE_PROBE2(ip__ire__del, 6670ad1ccddSsowmini (ire_t *), gw_ire, (irb_t *), irb); 6680ad1ccddSsowmini IRE_FIND_NEXT_ORIGIN(next); 6690ad1ccddSsowmini irb->irb_rr_origin = next; 6700ad1ccddSsowmini } 6717c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 6727c478bd9Sstevel@tonic-gate } 6737c478bd9Sstevel@tonic-gate } 6747c478bd9Sstevel@tonic-gate done: 675c793af95Ssangeeta if (gire != NULL) 676c793af95Ssangeeta IRE_REFRELE(gire); 6777c478bd9Sstevel@tonic-gate /* report the bad route to routing sockets */ 6787c478bd9Sstevel@tonic-gate ip_rts_change(RTM_LOSING, ire->ire_addr, ire->ire_gateway_addr, 6797c478bd9Sstevel@tonic-gate ire->ire_mask, ire->ire_src_addr, 0, 0, 0, 680f4b3ec61Sdh155122 (RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_IFA), ipst); 6817c478bd9Sstevel@tonic-gate routing_sock_info = B_TRUE; 682dc041e83Scarlsonj 683dc041e83Scarlsonj /* 684dc041e83Scarlsonj * TCP is really telling us to start over completely, and it 685dc041e83Scarlsonj * expects that we'll resend the ARP query. Tell ARP to 686dc041e83Scarlsonj * discard the entry, if this is a local destination. 687dc041e83Scarlsonj */ 688dc041e83Scarlsonj ill = ire->ire_stq->q_ptr; 689dc041e83Scarlsonj if (ire->ire_gateway_addr == 0 && 690dc041e83Scarlsonj (arp_mp = ill_ared_alloc(ill, addr)) != NULL) { 691dc041e83Scarlsonj putnext(ill->ill_rq, arp_mp); 692dc041e83Scarlsonj } 693dc041e83Scarlsonj 6947c478bd9Sstevel@tonic-gate ire_delete(ire); 6957c478bd9Sstevel@tonic-gate ire_refrele(ire); 6967c478bd9Sstevel@tonic-gate } 6976bdb8e66Sdd193516 /* 6986bdb8e66Sdd193516 * Also look for an IRE_HOST type redirect ire and 6996bdb8e66Sdd193516 * remove it if present. 7006bdb8e66Sdd193516 */ 7016bdb8e66Sdd193516 ire = ire_route_lookup(addr, 0, 0, IRE_HOST, NULL, NULL, 702f4b3ec61Sdh155122 ALL_ZONES, NULL, MATCH_IRE_TYPE, ipst); 7037c478bd9Sstevel@tonic-gate 7047c478bd9Sstevel@tonic-gate /* Nail it. */ 7056bdb8e66Sdd193516 if (ire != NULL) { 7066bdb8e66Sdd193516 if (ire->ire_flags & RTF_DYNAMIC) { 7077c478bd9Sstevel@tonic-gate if (!routing_sock_info) { 7087c478bd9Sstevel@tonic-gate ip_rts_change(RTM_LOSING, ire->ire_addr, 7097c478bd9Sstevel@tonic-gate ire->ire_gateway_addr, ire->ire_mask, 7107c478bd9Sstevel@tonic-gate ire->ire_src_addr, 0, 0, 0, 71154da8755Ssowmini (RTA_DST | RTA_GATEWAY | 71254da8755Ssowmini RTA_NETMASK | RTA_IFA), 713f4b3ec61Sdh155122 ipst); 7147c478bd9Sstevel@tonic-gate } 7157c478bd9Sstevel@tonic-gate ire_delete(ire); 7166bdb8e66Sdd193516 } 7177c478bd9Sstevel@tonic-gate ire_refrele(ire); 7187c478bd9Sstevel@tonic-gate } 7197c478bd9Sstevel@tonic-gate return (0); 7207c478bd9Sstevel@tonic-gate } 7217c478bd9Sstevel@tonic-gate 7227c478bd9Sstevel@tonic-gate /* 7237c478bd9Sstevel@tonic-gate * Named Dispatch routine to produce a formatted report on all IREs. 7247c478bd9Sstevel@tonic-gate * This report is accessed by using the ndd utility to "get" ND variable 7257c478bd9Sstevel@tonic-gate * "ipv4_ire_status". 7267c478bd9Sstevel@tonic-gate */ 7277c478bd9Sstevel@tonic-gate /* ARGSUSED */ 7287c478bd9Sstevel@tonic-gate int 7297c478bd9Sstevel@tonic-gate ip_ire_report(queue_t *q, mblk_t *mp, caddr_t arg, cred_t *ioc_cr) 7307c478bd9Sstevel@tonic-gate { 7317c478bd9Sstevel@tonic-gate zoneid_t zoneid; 732f4b3ec61Sdh155122 ip_stack_t *ipst; 733f4b3ec61Sdh155122 734f4b3ec61Sdh155122 if (CONN_Q(q)) 735f4b3ec61Sdh155122 ipst = CONNQ_TO_IPST(q); 736f4b3ec61Sdh155122 else 737f4b3ec61Sdh155122 ipst = ILLQ_TO_IPST(q); 7387c478bd9Sstevel@tonic-gate 7397c478bd9Sstevel@tonic-gate (void) mi_mpprintf(mp, 7407c478bd9Sstevel@tonic-gate "IRE " MI_COL_HDRPAD_STR 7417c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 7427c478bd9Sstevel@tonic-gate "rfq " MI_COL_HDRPAD_STR 7437c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 7447c478bd9Sstevel@tonic-gate "stq " MI_COL_HDRPAD_STR 7457c478bd9Sstevel@tonic-gate /* 01234567[89ABCDEF] */ 7467c478bd9Sstevel@tonic-gate " zone " 7477c478bd9Sstevel@tonic-gate /* 12345 */ 7487c478bd9Sstevel@tonic-gate "addr mask " 7497c478bd9Sstevel@tonic-gate /* 123.123.123.123 123.123.123.123 */ 7507c478bd9Sstevel@tonic-gate "src gateway mxfrg rtt rtt_sd ssthresh ref " 7517c478bd9Sstevel@tonic-gate /* 123.123.123.123 123.123.123.123 12345 12345 123456 12345678 123 */ 7527c478bd9Sstevel@tonic-gate "rtomax tstamp_ok wscale_ok ecn_ok pmtud_ok sack sendpipe " 7537c478bd9Sstevel@tonic-gate /* 123456 123456789 123456789 123456 12345678 1234 12345678 */ 7547c478bd9Sstevel@tonic-gate "recvpipe in/out/forward type"); 7557c478bd9Sstevel@tonic-gate /* 12345678 in/out/forward xxxxxxxxxx */ 7567c478bd9Sstevel@tonic-gate 7577c478bd9Sstevel@tonic-gate /* 7587c478bd9Sstevel@tonic-gate * Because of the ndd constraint, at most we can have 64K buffer 7597c478bd9Sstevel@tonic-gate * to put in all IRE info. So to be more efficient, just 7607c478bd9Sstevel@tonic-gate * allocate a 64K buffer here, assuming we need that large buffer. 7617c478bd9Sstevel@tonic-gate * This should be OK as only root can do ndd /dev/ip. 7627c478bd9Sstevel@tonic-gate */ 7637c478bd9Sstevel@tonic-gate if ((mp->b_cont = allocb(ND_MAX_BUF_LEN, BPRI_HI)) == NULL) { 7647c478bd9Sstevel@tonic-gate /* The following may work even if we cannot get a large buf. */ 7657c478bd9Sstevel@tonic-gate (void) mi_mpprintf(mp, "<< Out of buffer >>\n"); 7667c478bd9Sstevel@tonic-gate return (0); 7677c478bd9Sstevel@tonic-gate } 7687c478bd9Sstevel@tonic-gate 7697c478bd9Sstevel@tonic-gate zoneid = Q_TO_CONN(q)->conn_zoneid; 7707c478bd9Sstevel@tonic-gate if (zoneid == GLOBAL_ZONEID) 7717c478bd9Sstevel@tonic-gate zoneid = ALL_ZONES; 7727c478bd9Sstevel@tonic-gate 773f4b3ec61Sdh155122 ire_walk_v4(ire_report_ftable, mp->b_cont, zoneid, ipst); 774f4b3ec61Sdh155122 ire_walk_v4(ire_report_ctable, mp->b_cont, zoneid, ipst); 7757c478bd9Sstevel@tonic-gate 7767c478bd9Sstevel@tonic-gate return (0); 7777c478bd9Sstevel@tonic-gate } 7787c478bd9Sstevel@tonic-gate 7797c478bd9Sstevel@tonic-gate 7807c478bd9Sstevel@tonic-gate /* ire_walk routine invoked for ip_ire_report for each cached IRE. */ 7817c478bd9Sstevel@tonic-gate static void 7827c478bd9Sstevel@tonic-gate ire_report_ctable(ire_t *ire, char *mp) 7837c478bd9Sstevel@tonic-gate { 7847c478bd9Sstevel@tonic-gate char buf1[16]; 7857c478bd9Sstevel@tonic-gate char buf2[16]; 7867c478bd9Sstevel@tonic-gate char buf3[16]; 7877c478bd9Sstevel@tonic-gate char buf4[16]; 7887c478bd9Sstevel@tonic-gate uint_t fo_pkt_count; 7897c478bd9Sstevel@tonic-gate uint_t ib_pkt_count; 7907c478bd9Sstevel@tonic-gate int ref; 7917c478bd9Sstevel@tonic-gate uint_t print_len, buf_len; 7927c478bd9Sstevel@tonic-gate 7937c478bd9Sstevel@tonic-gate if ((ire->ire_type & IRE_CACHETABLE) == 0) 7947c478bd9Sstevel@tonic-gate return; 7957c478bd9Sstevel@tonic-gate buf_len = ((mblk_t *)mp)->b_datap->db_lim - ((mblk_t *)mp)->b_wptr; 7967c478bd9Sstevel@tonic-gate if (buf_len <= 0) 7977c478bd9Sstevel@tonic-gate return; 7987c478bd9Sstevel@tonic-gate 7997c478bd9Sstevel@tonic-gate /* Number of active references of this ire */ 8007c478bd9Sstevel@tonic-gate ref = ire->ire_refcnt; 8017c478bd9Sstevel@tonic-gate /* "inbound" to a non local address is a forward */ 8027c478bd9Sstevel@tonic-gate ib_pkt_count = ire->ire_ib_pkt_count; 8037c478bd9Sstevel@tonic-gate fo_pkt_count = 0; 8047c478bd9Sstevel@tonic-gate if (!(ire->ire_type & (IRE_LOCAL|IRE_BROADCAST))) { 8057c478bd9Sstevel@tonic-gate fo_pkt_count = ib_pkt_count; 8067c478bd9Sstevel@tonic-gate ib_pkt_count = 0; 8077c478bd9Sstevel@tonic-gate } 8087c478bd9Sstevel@tonic-gate print_len = snprintf((char *)((mblk_t *)mp)->b_wptr, buf_len, 8097c478bd9Sstevel@tonic-gate MI_COL_PTRFMT_STR MI_COL_PTRFMT_STR MI_COL_PTRFMT_STR "%5d " 8107c478bd9Sstevel@tonic-gate "%s %s %s %s %05d %05ld %06ld %08d %03d %06d %09d %09d %06d %08d " 8117c478bd9Sstevel@tonic-gate "%04d %08d %08d %d/%d/%d %s\n", 8127c478bd9Sstevel@tonic-gate (void *)ire, (void *)ire->ire_rfq, (void *)ire->ire_stq, 8137c478bd9Sstevel@tonic-gate (int)ire->ire_zoneid, 8147c478bd9Sstevel@tonic-gate ip_dot_addr(ire->ire_addr, buf1), ip_dot_addr(ire->ire_mask, buf2), 8157c478bd9Sstevel@tonic-gate ip_dot_addr(ire->ire_src_addr, buf3), 8167c478bd9Sstevel@tonic-gate ip_dot_addr(ire->ire_gateway_addr, buf4), 8177c478bd9Sstevel@tonic-gate ire->ire_max_frag, ire->ire_uinfo.iulp_rtt, 8187c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtt_sd, ire->ire_uinfo.iulp_ssthresh, ref, 8197c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_rtomax, 8207c478bd9Sstevel@tonic-gate (ire->ire_uinfo.iulp_tstamp_ok ? 1: 0), 8217c478bd9Sstevel@tonic-gate (ire->ire_uinfo.iulp_wscale_ok ? 1: 0), 8227c478bd9Sstevel@tonic-gate (ire->ire_uinfo.iulp_ecn_ok ? 1: 0), 8237c478bd9Sstevel@tonic-gate (ire->ire_uinfo.iulp_pmtud_ok ? 1: 0), 8247c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_sack, 8257c478bd9Sstevel@tonic-gate ire->ire_uinfo.iulp_spipe, ire->ire_uinfo.iulp_rpipe, 8267c478bd9Sstevel@tonic-gate ib_pkt_count, ire->ire_ob_pkt_count, fo_pkt_count, 8277c478bd9Sstevel@tonic-gate ip_nv_lookup(ire_nv_tbl, (int)ire->ire_type)); 8287c478bd9Sstevel@tonic-gate if (print_len < buf_len) { 8297c478bd9Sstevel@tonic-gate ((mblk_t *)mp)->b_wptr += print_len; 8307c478bd9Sstevel@tonic-gate } else { 8317c478bd9Sstevel@tonic-gate ((mblk_t *)mp)->b_wptr += buf_len; 8327c478bd9Sstevel@tonic-gate } 8337c478bd9Sstevel@tonic-gate } 8347c478bd9Sstevel@tonic-gate 8357c478bd9Sstevel@tonic-gate /* 8367c478bd9Sstevel@tonic-gate * ip_ire_req is called by ip_wput when an IRE_DB_REQ_TYPE message is handed 8377c478bd9Sstevel@tonic-gate * down from the Upper Level Protocol to request a copy of the IRE (to check 8387c478bd9Sstevel@tonic-gate * its type or to extract information like round-trip time estimates or the 8397c478bd9Sstevel@tonic-gate * MTU.) 8407c478bd9Sstevel@tonic-gate * The address is assumed to be in the ire_addr field. If no IRE is found 8417c478bd9Sstevel@tonic-gate * an IRE is returned with ire_type being zero. 8427c478bd9Sstevel@tonic-gate * Note that the upper lavel protocol has to check for broadcast 8437c478bd9Sstevel@tonic-gate * (IRE_BROADCAST) and multicast (CLASSD(addr)). 8447c478bd9Sstevel@tonic-gate * If there is a b_cont the resulting IRE_DB_TYPE mblk is placed at the 8457c478bd9Sstevel@tonic-gate * end of the returned message. 8467c478bd9Sstevel@tonic-gate * 8477c478bd9Sstevel@tonic-gate * TCP sends down a message of this type with a connection request packet 8487c478bd9Sstevel@tonic-gate * chained on. UDP and ICMP send it down to verify that a route exists for 8497c478bd9Sstevel@tonic-gate * the destination address when they get connected. 8507c478bd9Sstevel@tonic-gate */ 8517c478bd9Sstevel@tonic-gate void 8527c478bd9Sstevel@tonic-gate ip_ire_req(queue_t *q, mblk_t *mp) 8537c478bd9Sstevel@tonic-gate { 8547c478bd9Sstevel@tonic-gate ire_t *inire; 8557c478bd9Sstevel@tonic-gate ire_t *ire; 8567c478bd9Sstevel@tonic-gate mblk_t *mp1; 8577c478bd9Sstevel@tonic-gate ire_t *sire = NULL; 8587c478bd9Sstevel@tonic-gate zoneid_t zoneid = Q_TO_CONN(q)->conn_zoneid; 859f4b3ec61Sdh155122 ip_stack_t *ipst = CONNQ_TO_IPST(q); 860f4b3ec61Sdh155122 861f4b3ec61Sdh155122 ASSERT(q->q_next == NULL); 8627c478bd9Sstevel@tonic-gate 8637c478bd9Sstevel@tonic-gate if ((mp->b_wptr - mp->b_rptr) < sizeof (ire_t) || 8647c478bd9Sstevel@tonic-gate !OK_32PTR(mp->b_rptr)) { 8657c478bd9Sstevel@tonic-gate freemsg(mp); 8667c478bd9Sstevel@tonic-gate return; 8677c478bd9Sstevel@tonic-gate } 8687c478bd9Sstevel@tonic-gate inire = (ire_t *)mp->b_rptr; 8697c478bd9Sstevel@tonic-gate /* 8707c478bd9Sstevel@tonic-gate * Got it, now take our best shot at an IRE. 8717c478bd9Sstevel@tonic-gate */ 8727c478bd9Sstevel@tonic-gate if (inire->ire_ipversion == IPV6_VERSION) { 8737c478bd9Sstevel@tonic-gate ire = ire_route_lookup_v6(&inire->ire_addr_v6, 0, 0, 0, 87445916cd2Sjpk NULL, &sire, zoneid, NULL, 875f4b3ec61Sdh155122 (MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT), ipst); 8767c478bd9Sstevel@tonic-gate } else { 8777c478bd9Sstevel@tonic-gate ASSERT(inire->ire_ipversion == IPV4_VERSION); 8787c478bd9Sstevel@tonic-gate ire = ire_route_lookup(inire->ire_addr, 0, 0, 0, 87945916cd2Sjpk NULL, &sire, zoneid, NULL, 880f4b3ec61Sdh155122 (MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT), ipst); 8817c478bd9Sstevel@tonic-gate } 8827c478bd9Sstevel@tonic-gate 8837c478bd9Sstevel@tonic-gate /* 8847c478bd9Sstevel@tonic-gate * We prevent returning IRES with source address INADDR_ANY 8857c478bd9Sstevel@tonic-gate * as these were temporarily created for sending packets 8867c478bd9Sstevel@tonic-gate * from endpoints that have conn_unspec_src set. 8877c478bd9Sstevel@tonic-gate */ 8887c478bd9Sstevel@tonic-gate if (ire == NULL || 8897c478bd9Sstevel@tonic-gate (ire->ire_ipversion == IPV4_VERSION && 8907c478bd9Sstevel@tonic-gate ire->ire_src_addr == INADDR_ANY) || 8917c478bd9Sstevel@tonic-gate (ire->ire_ipversion == IPV6_VERSION && 8927c478bd9Sstevel@tonic-gate IN6_IS_ADDR_UNSPECIFIED(&ire->ire_src_addr_v6))) { 8937c478bd9Sstevel@tonic-gate inire->ire_type = 0; 8947c478bd9Sstevel@tonic-gate } else { 8957c478bd9Sstevel@tonic-gate bcopy(ire, inire, sizeof (ire_t)); 8967c478bd9Sstevel@tonic-gate /* Copy the route metrics from the parent. */ 8977c478bd9Sstevel@tonic-gate if (sire != NULL) { 8987c478bd9Sstevel@tonic-gate bcopy(&(sire->ire_uinfo), &(inire->ire_uinfo), 8997c478bd9Sstevel@tonic-gate sizeof (iulp_t)); 9007c478bd9Sstevel@tonic-gate } 9017c478bd9Sstevel@tonic-gate 9027c478bd9Sstevel@tonic-gate /* 9037c478bd9Sstevel@tonic-gate * As we don't lookup global policy here, we may not 9047c478bd9Sstevel@tonic-gate * pass the right size if per-socket policy is not 9057c478bd9Sstevel@tonic-gate * present. For these cases, path mtu discovery will 9067c478bd9Sstevel@tonic-gate * do the right thing. 9077c478bd9Sstevel@tonic-gate */ 9087c478bd9Sstevel@tonic-gate inire->ire_ipsec_overhead = conn_ipsec_length(Q_TO_CONN(q)); 9097c478bd9Sstevel@tonic-gate 9107c478bd9Sstevel@tonic-gate /* Pass the latest setting of the ip_path_mtu_discovery */ 911f4b3ec61Sdh155122 inire->ire_frag_flag |= 912f4b3ec61Sdh155122 (ipst->ips_ip_path_mtu_discovery) ? IPH_DF : 0; 9137c478bd9Sstevel@tonic-gate } 9147c478bd9Sstevel@tonic-gate if (ire != NULL) 9157c478bd9Sstevel@tonic-gate ire_refrele(ire); 9167c478bd9Sstevel@tonic-gate if (sire != NULL) 9177c478bd9Sstevel@tonic-gate ire_refrele(sire); 9187c478bd9Sstevel@tonic-gate mp->b_wptr = &mp->b_rptr[sizeof (ire_t)]; 9197c478bd9Sstevel@tonic-gate mp->b_datap->db_type = IRE_DB_TYPE; 9207c478bd9Sstevel@tonic-gate 9217c478bd9Sstevel@tonic-gate /* Put the IRE_DB_TYPE mblk last in the chain */ 9227c478bd9Sstevel@tonic-gate mp1 = mp->b_cont; 9237c478bd9Sstevel@tonic-gate if (mp1 != NULL) { 9247c478bd9Sstevel@tonic-gate mp->b_cont = NULL; 9257c478bd9Sstevel@tonic-gate linkb(mp1, mp); 9267c478bd9Sstevel@tonic-gate mp = mp1; 9277c478bd9Sstevel@tonic-gate } 9287c478bd9Sstevel@tonic-gate qreply(q, mp); 9297c478bd9Sstevel@tonic-gate } 9307c478bd9Sstevel@tonic-gate 9317c478bd9Sstevel@tonic-gate /* 9327c478bd9Sstevel@tonic-gate * Send a packet using the specified IRE. 9337c478bd9Sstevel@tonic-gate * If ire_src_addr_v6 is all zero then discard the IRE after 9347c478bd9Sstevel@tonic-gate * the packet has been sent. 9357c478bd9Sstevel@tonic-gate */ 9367c478bd9Sstevel@tonic-gate static void 9377c478bd9Sstevel@tonic-gate ire_send(queue_t *q, mblk_t *pkt, ire_t *ire) 9387c478bd9Sstevel@tonic-gate { 9397c478bd9Sstevel@tonic-gate mblk_t *ipsec_mp; 9407c478bd9Sstevel@tonic-gate boolean_t is_secure; 9417c478bd9Sstevel@tonic-gate uint_t ifindex; 9427c478bd9Sstevel@tonic-gate ill_t *ill; 9435597b60aSnordmark zoneid_t zoneid = ire->ire_zoneid; 944f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 9457c478bd9Sstevel@tonic-gate 9467c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 9475597b60aSnordmark ASSERT(!(ire->ire_type & IRE_LOCAL)); /* Has different ire_zoneid */ 9487c478bd9Sstevel@tonic-gate ipsec_mp = pkt; 9497c478bd9Sstevel@tonic-gate is_secure = (pkt->b_datap->db_type == M_CTL); 9505597b60aSnordmark if (is_secure) { 9515597b60aSnordmark ipsec_out_t *io; 9525597b60aSnordmark 9537c478bd9Sstevel@tonic-gate pkt = pkt->b_cont; 9545597b60aSnordmark io = (ipsec_out_t *)ipsec_mp->b_rptr; 9555597b60aSnordmark if (io->ipsec_out_type == IPSEC_OUT) 9565597b60aSnordmark zoneid = io->ipsec_out_zoneid; 9575597b60aSnordmark } 9587c478bd9Sstevel@tonic-gate 9597c478bd9Sstevel@tonic-gate /* If the packet originated externally then */ 9607c478bd9Sstevel@tonic-gate if (pkt->b_prev) { 9617c478bd9Sstevel@tonic-gate ire_refrele(ire); 9627c478bd9Sstevel@tonic-gate /* 9637c478bd9Sstevel@tonic-gate * Extract the ifindex from b_prev (set in ip_rput_noire). 9647c478bd9Sstevel@tonic-gate * Look up interface to see if it still exists (it could have 9657c478bd9Sstevel@tonic-gate * been unplumbed by the time the reply came back from ARP) 9667c478bd9Sstevel@tonic-gate */ 9677c478bd9Sstevel@tonic-gate ifindex = (uint_t)(uintptr_t)pkt->b_prev; 9687c478bd9Sstevel@tonic-gate ill = ill_lookup_on_ifindex(ifindex, B_FALSE, 969f4b3ec61Sdh155122 NULL, NULL, NULL, NULL, ipst); 9707c478bd9Sstevel@tonic-gate if (ill == NULL) { 9717c478bd9Sstevel@tonic-gate pkt->b_prev = NULL; 9727c478bd9Sstevel@tonic-gate pkt->b_next = NULL; 9737c478bd9Sstevel@tonic-gate freemsg(ipsec_mp); 9747c478bd9Sstevel@tonic-gate return; 9757c478bd9Sstevel@tonic-gate } 9767c478bd9Sstevel@tonic-gate q = ill->ill_rq; 9777c478bd9Sstevel@tonic-gate pkt->b_prev = NULL; 9787c478bd9Sstevel@tonic-gate /* 9797c478bd9Sstevel@tonic-gate * This packet has not gone through IPSEC processing 9807c478bd9Sstevel@tonic-gate * and hence we should not have any IPSEC message 9817c478bd9Sstevel@tonic-gate * prepended. 9827c478bd9Sstevel@tonic-gate */ 9837c478bd9Sstevel@tonic-gate ASSERT(ipsec_mp == pkt); 984c793af95Ssangeeta put(q, pkt); 9857c478bd9Sstevel@tonic-gate ill_refrele(ill); 9867c478bd9Sstevel@tonic-gate } else if (pkt->b_next) { 9877c478bd9Sstevel@tonic-gate /* Packets from multicast router */ 9887c478bd9Sstevel@tonic-gate pkt->b_next = NULL; 9897c478bd9Sstevel@tonic-gate /* 9907c478bd9Sstevel@tonic-gate * We never get the IPSEC_OUT while forwarding the 9917c478bd9Sstevel@tonic-gate * packet for multicast router. 9927c478bd9Sstevel@tonic-gate */ 9937c478bd9Sstevel@tonic-gate ASSERT(ipsec_mp == pkt); 9947c478bd9Sstevel@tonic-gate ip_rput_forward(ire, (ipha_t *)pkt->b_rptr, ipsec_mp, NULL); 9957c478bd9Sstevel@tonic-gate ire_refrele(ire); 9967c478bd9Sstevel@tonic-gate } else { 9977c478bd9Sstevel@tonic-gate /* Locally originated packets */ 9987c478bd9Sstevel@tonic-gate boolean_t is_inaddr_any; 9997c478bd9Sstevel@tonic-gate ipha_t *ipha = (ipha_t *)pkt->b_rptr; 10007c478bd9Sstevel@tonic-gate 10017c478bd9Sstevel@tonic-gate /* 10027c478bd9Sstevel@tonic-gate * We need to do an ire_delete below for which 10037c478bd9Sstevel@tonic-gate * we need to make sure that the IRE will be 10047c478bd9Sstevel@tonic-gate * around even after calling ip_wput_ire - 10057c478bd9Sstevel@tonic-gate * which does ire_refrele. Otherwise somebody 10067c478bd9Sstevel@tonic-gate * could potentially delete this ire and hence 10077c478bd9Sstevel@tonic-gate * free this ire and we will be calling ire_delete 10087c478bd9Sstevel@tonic-gate * on a freed ire below. 10097c478bd9Sstevel@tonic-gate */ 10107c478bd9Sstevel@tonic-gate is_inaddr_any = (ire->ire_src_addr == INADDR_ANY); 10117c478bd9Sstevel@tonic-gate if (is_inaddr_any) { 10127c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 10137c478bd9Sstevel@tonic-gate } 10147c478bd9Sstevel@tonic-gate /* 10157c478bd9Sstevel@tonic-gate * If we were resolving a router we can not use the 10167c478bd9Sstevel@tonic-gate * routers IRE for sending the packet (since it would 10177c478bd9Sstevel@tonic-gate * violate the uniqness of the IP idents) thus we 10187c478bd9Sstevel@tonic-gate * make another pass through ip_wput to create the IRE_CACHE 10197c478bd9Sstevel@tonic-gate * for the destination. 10207c478bd9Sstevel@tonic-gate * When IRE_MARK_NOADD is set, ire_add() is not called. 10217c478bd9Sstevel@tonic-gate * Thus ip_wput() will never find a ire and result in an 10227c478bd9Sstevel@tonic-gate * infinite loop. Thus we check whether IRE_MARK_NOADD is 10237c478bd9Sstevel@tonic-gate * is set. This also implies that IRE_MARK_NOADD can only be 10247c478bd9Sstevel@tonic-gate * used to send packets to directly connected hosts. 10257c478bd9Sstevel@tonic-gate */ 10267c478bd9Sstevel@tonic-gate if (ipha->ipha_dst != ire->ire_addr && 10277c478bd9Sstevel@tonic-gate !(ire->ire_marks & IRE_MARK_NOADD)) { 10287c478bd9Sstevel@tonic-gate ire_refrele(ire); /* Held in ire_add */ 10295597b60aSnordmark if (CONN_Q(q)) { 10305597b60aSnordmark (void) ip_output(Q_TO_CONN(q), ipsec_mp, q, 10315597b60aSnordmark IRE_SEND); 10325597b60aSnordmark } else { 10335597b60aSnordmark (void) ip_output((void *)(uintptr_t)zoneid, 10345597b60aSnordmark ipsec_mp, q, IRE_SEND); 10355597b60aSnordmark } 10367c478bd9Sstevel@tonic-gate } else { 10377c478bd9Sstevel@tonic-gate if (is_secure) { 10387c478bd9Sstevel@tonic-gate ipsec_out_t *oi; 10397c478bd9Sstevel@tonic-gate ipha_t *ipha; 10407c478bd9Sstevel@tonic-gate 10417c478bd9Sstevel@tonic-gate oi = (ipsec_out_t *)ipsec_mp->b_rptr; 10427c478bd9Sstevel@tonic-gate ipha = (ipha_t *)ipsec_mp->b_cont->b_rptr; 10437c478bd9Sstevel@tonic-gate if (oi->ipsec_out_proc_begin) { 10447c478bd9Sstevel@tonic-gate /* 10457c478bd9Sstevel@tonic-gate * This is the case where 10467c478bd9Sstevel@tonic-gate * ip_wput_ipsec_out could not find 10477c478bd9Sstevel@tonic-gate * the IRE and recreated a new one. 10487c478bd9Sstevel@tonic-gate * As ip_wput_ipsec_out does ire 10497c478bd9Sstevel@tonic-gate * lookups, ire_refrele for the extra 10507c478bd9Sstevel@tonic-gate * bump in ire_add. 10517c478bd9Sstevel@tonic-gate */ 10527c478bd9Sstevel@tonic-gate ire_refrele(ire); 10537c478bd9Sstevel@tonic-gate ip_wput_ipsec_out(q, ipsec_mp, ipha, 10547c478bd9Sstevel@tonic-gate NULL, NULL); 10557c478bd9Sstevel@tonic-gate } else { 10567c478bd9Sstevel@tonic-gate /* 10577c478bd9Sstevel@tonic-gate * IRE_REFRELE will be done in 10587c478bd9Sstevel@tonic-gate * ip_wput_ire. 10597c478bd9Sstevel@tonic-gate */ 10607c478bd9Sstevel@tonic-gate ip_wput_ire(q, ipsec_mp, ire, NULL, 10615597b60aSnordmark IRE_SEND, zoneid); 10627c478bd9Sstevel@tonic-gate } 10637c478bd9Sstevel@tonic-gate } else { 10647c478bd9Sstevel@tonic-gate /* 10657c478bd9Sstevel@tonic-gate * IRE_REFRELE will be done in ip_wput_ire. 10667c478bd9Sstevel@tonic-gate */ 10677c478bd9Sstevel@tonic-gate ip_wput_ire(q, ipsec_mp, ire, NULL, 10685597b60aSnordmark IRE_SEND, zoneid); 10697c478bd9Sstevel@tonic-gate } 10707c478bd9Sstevel@tonic-gate } 10717c478bd9Sstevel@tonic-gate /* 10727c478bd9Sstevel@tonic-gate * Special code to support sending a single packet with 10737c478bd9Sstevel@tonic-gate * conn_unspec_src using an IRE which has no source address. 10747c478bd9Sstevel@tonic-gate * The IRE is deleted here after sending the packet to avoid 10757c478bd9Sstevel@tonic-gate * having other code trip on it. But before we delete the 10767c478bd9Sstevel@tonic-gate * ire, somebody could have looked up this ire. 10777c478bd9Sstevel@tonic-gate * We prevent returning/using this IRE by the upper layers 10787c478bd9Sstevel@tonic-gate * by making checks to NULL source address in other places 10797c478bd9Sstevel@tonic-gate * like e.g ip_ire_append, ip_ire_req and ip_bind_connected. 10807c478bd9Sstevel@tonic-gate * Though, this does not completely prevent other threads 10817c478bd9Sstevel@tonic-gate * from using this ire, this should not cause any problems. 10827c478bd9Sstevel@tonic-gate * 10837c478bd9Sstevel@tonic-gate * NOTE : We use is_inaddr_any instead of using ire_src_addr 10847c478bd9Sstevel@tonic-gate * because for the normal case i.e !is_inaddr_any, ire_refrele 10857c478bd9Sstevel@tonic-gate * above could have potentially freed the ire. 10867c478bd9Sstevel@tonic-gate */ 10877c478bd9Sstevel@tonic-gate if (is_inaddr_any) { 10887c478bd9Sstevel@tonic-gate /* 10897c478bd9Sstevel@tonic-gate * If this IRE has been deleted by another thread, then 10907c478bd9Sstevel@tonic-gate * ire_bucket won't be NULL, but ire_ptpn will be NULL. 10917c478bd9Sstevel@tonic-gate * Thus, ire_delete will do nothing. This check 10927c478bd9Sstevel@tonic-gate * guards against calling ire_delete when the IRE was 10937c478bd9Sstevel@tonic-gate * never inserted in the table, which is handled by 10947c478bd9Sstevel@tonic-gate * ire_delete as dropping another reference. 10957c478bd9Sstevel@tonic-gate */ 10967c478bd9Sstevel@tonic-gate if (ire->ire_bucket != NULL) { 10977c478bd9Sstevel@tonic-gate ip1dbg(("ire_send: delete IRE\n")); 10987c478bd9Sstevel@tonic-gate ire_delete(ire); 10997c478bd9Sstevel@tonic-gate } 11007c478bd9Sstevel@tonic-gate ire_refrele(ire); /* Held above */ 11017c478bd9Sstevel@tonic-gate } 11027c478bd9Sstevel@tonic-gate } 11037c478bd9Sstevel@tonic-gate } 11047c478bd9Sstevel@tonic-gate 11057c478bd9Sstevel@tonic-gate /* 11067c478bd9Sstevel@tonic-gate * Send a packet using the specified IRE. 11077c478bd9Sstevel@tonic-gate * If ire_src_addr_v6 is all zero then discard the IRE after 11087c478bd9Sstevel@tonic-gate * the packet has been sent. 11097c478bd9Sstevel@tonic-gate */ 11107c478bd9Sstevel@tonic-gate static void 11117c478bd9Sstevel@tonic-gate ire_send_v6(queue_t *q, mblk_t *pkt, ire_t *ire) 11127c478bd9Sstevel@tonic-gate { 11137c478bd9Sstevel@tonic-gate mblk_t *ipsec_mp; 11147c478bd9Sstevel@tonic-gate boolean_t secure; 11157c478bd9Sstevel@tonic-gate uint_t ifindex; 11165597b60aSnordmark zoneid_t zoneid = ire->ire_zoneid; 1117f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 11187c478bd9Sstevel@tonic-gate 11197c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV6_VERSION); 11205597b60aSnordmark ASSERT(!(ire->ire_type & IRE_LOCAL)); /* Has different ire_zoneid */ 11217c478bd9Sstevel@tonic-gate if (pkt->b_datap->db_type == M_CTL) { 11225597b60aSnordmark ipsec_out_t *io; 11235597b60aSnordmark 11247c478bd9Sstevel@tonic-gate ipsec_mp = pkt; 11257c478bd9Sstevel@tonic-gate pkt = pkt->b_cont; 11267c478bd9Sstevel@tonic-gate secure = B_TRUE; 11275597b60aSnordmark io = (ipsec_out_t *)ipsec_mp->b_rptr; 11285597b60aSnordmark if (io->ipsec_out_type == IPSEC_OUT) 11295597b60aSnordmark zoneid = io->ipsec_out_zoneid; 11307c478bd9Sstevel@tonic-gate } else { 11317c478bd9Sstevel@tonic-gate ipsec_mp = pkt; 11327c478bd9Sstevel@tonic-gate secure = B_FALSE; 11337c478bd9Sstevel@tonic-gate } 11347c478bd9Sstevel@tonic-gate 11357c478bd9Sstevel@tonic-gate /* If the packet originated externally then */ 11367c478bd9Sstevel@tonic-gate if (pkt->b_prev) { 11377c478bd9Sstevel@tonic-gate ill_t *ill; 11387c478bd9Sstevel@tonic-gate /* 11397c478bd9Sstevel@tonic-gate * Extract the ifindex from b_prev (set in ip_rput_data_v6). 11407c478bd9Sstevel@tonic-gate * Look up interface to see if it still exists (it could have 11417c478bd9Sstevel@tonic-gate * been unplumbed by the time the reply came back from the 1142c793af95Ssangeeta * resolver). 11437c478bd9Sstevel@tonic-gate */ 11447c478bd9Sstevel@tonic-gate ifindex = (uint_t)(uintptr_t)pkt->b_prev; 11457c478bd9Sstevel@tonic-gate ill = ill_lookup_on_ifindex(ifindex, B_TRUE, 1146f4b3ec61Sdh155122 NULL, NULL, NULL, NULL, ipst); 11477c478bd9Sstevel@tonic-gate if (ill == NULL) { 11487c478bd9Sstevel@tonic-gate pkt->b_prev = NULL; 11497c478bd9Sstevel@tonic-gate pkt->b_next = NULL; 11507c478bd9Sstevel@tonic-gate freemsg(ipsec_mp); 11517c478bd9Sstevel@tonic-gate ire_refrele(ire); /* Held in ire_add */ 11527c478bd9Sstevel@tonic-gate return; 11537c478bd9Sstevel@tonic-gate } 11547c478bd9Sstevel@tonic-gate q = ill->ill_rq; 11557c478bd9Sstevel@tonic-gate pkt->b_prev = NULL; 11567c478bd9Sstevel@tonic-gate /* 11577c478bd9Sstevel@tonic-gate * This packet has not gone through IPSEC processing 11587c478bd9Sstevel@tonic-gate * and hence we should not have any IPSEC message 11597c478bd9Sstevel@tonic-gate * prepended. 11607c478bd9Sstevel@tonic-gate */ 11617c478bd9Sstevel@tonic-gate ASSERT(ipsec_mp == pkt); 11627c478bd9Sstevel@tonic-gate put(q, pkt); 11637c478bd9Sstevel@tonic-gate ill_refrele(ill); 11647c478bd9Sstevel@tonic-gate } else if (pkt->b_next) { 11657c478bd9Sstevel@tonic-gate /* Packets from multicast router */ 11667c478bd9Sstevel@tonic-gate pkt->b_next = NULL; 11677c478bd9Sstevel@tonic-gate /* 11687c478bd9Sstevel@tonic-gate * We never get the IPSEC_OUT while forwarding the 11697c478bd9Sstevel@tonic-gate * packet for multicast router. 11707c478bd9Sstevel@tonic-gate */ 11717c478bd9Sstevel@tonic-gate ASSERT(ipsec_mp == pkt); 11727c478bd9Sstevel@tonic-gate /* 11737c478bd9Sstevel@tonic-gate * XXX TODO IPv6. 11747c478bd9Sstevel@tonic-gate */ 11757c478bd9Sstevel@tonic-gate freemsg(pkt); 11767c478bd9Sstevel@tonic-gate #ifdef XXX 11777c478bd9Sstevel@tonic-gate ip_rput_forward(ire, (ipha_t *)pkt->b_rptr, pkt, NULL); 11787c478bd9Sstevel@tonic-gate #endif 11797c478bd9Sstevel@tonic-gate } else { 11807c478bd9Sstevel@tonic-gate if (secure) { 11817c478bd9Sstevel@tonic-gate ipsec_out_t *oi; 11827c478bd9Sstevel@tonic-gate ip6_t *ip6h; 11837c478bd9Sstevel@tonic-gate 11847c478bd9Sstevel@tonic-gate oi = (ipsec_out_t *)ipsec_mp->b_rptr; 11857c478bd9Sstevel@tonic-gate ip6h = (ip6_t *)ipsec_mp->b_cont->b_rptr; 11867c478bd9Sstevel@tonic-gate if (oi->ipsec_out_proc_begin) { 11877c478bd9Sstevel@tonic-gate /* 11887c478bd9Sstevel@tonic-gate * This is the case where 11897c478bd9Sstevel@tonic-gate * ip_wput_ipsec_out could not find 11907c478bd9Sstevel@tonic-gate * the IRE and recreated a new one. 11917c478bd9Sstevel@tonic-gate */ 11927c478bd9Sstevel@tonic-gate ip_wput_ipsec_out_v6(q, ipsec_mp, ip6h, 11937c478bd9Sstevel@tonic-gate NULL, NULL); 11947c478bd9Sstevel@tonic-gate } else { 11955597b60aSnordmark if (CONN_Q(q)) { 11965597b60aSnordmark (void) ip_output_v6(Q_TO_CONN(q), 11975597b60aSnordmark ipsec_mp, q, IRE_SEND); 11985597b60aSnordmark } else { 11995597b60aSnordmark (void) ip_output_v6( 12005597b60aSnordmark (void *)(uintptr_t)zoneid, 12015597b60aSnordmark ipsec_mp, q, IRE_SEND); 12025597b60aSnordmark } 12037c478bd9Sstevel@tonic-gate } 12047c478bd9Sstevel@tonic-gate } else { 12057c478bd9Sstevel@tonic-gate /* 12067c478bd9Sstevel@tonic-gate * Send packets through ip_output_v6 so that any 12077c478bd9Sstevel@tonic-gate * ip6_info header can be processed again. 12087c478bd9Sstevel@tonic-gate */ 12095597b60aSnordmark if (CONN_Q(q)) { 12107c478bd9Sstevel@tonic-gate (void) ip_output_v6(Q_TO_CONN(q), ipsec_mp, q, 12117c478bd9Sstevel@tonic-gate IRE_SEND); 12125597b60aSnordmark } else { 12135597b60aSnordmark (void) ip_output_v6((void *)(uintptr_t)zoneid, 12145597b60aSnordmark ipsec_mp, q, IRE_SEND); 12155597b60aSnordmark } 12167c478bd9Sstevel@tonic-gate } 12177c478bd9Sstevel@tonic-gate /* 12187c478bd9Sstevel@tonic-gate * Special code to support sending a single packet with 12197c478bd9Sstevel@tonic-gate * conn_unspec_src using an IRE which has no source address. 12207c478bd9Sstevel@tonic-gate * The IRE is deleted here after sending the packet to avoid 12217c478bd9Sstevel@tonic-gate * having other code trip on it. But before we delete the 12227c478bd9Sstevel@tonic-gate * ire, somebody could have looked up this ire. 12237c478bd9Sstevel@tonic-gate * We prevent returning/using this IRE by the upper layers 12247c478bd9Sstevel@tonic-gate * by making checks to NULL source address in other places 12257c478bd9Sstevel@tonic-gate * like e.g ip_ire_append_v6, ip_ire_req and 12267c478bd9Sstevel@tonic-gate * ip_bind_connected_v6. Though, this does not completely 12277c478bd9Sstevel@tonic-gate * prevent other threads from using this ire, this should 12287c478bd9Sstevel@tonic-gate * not cause any problems. 12297c478bd9Sstevel@tonic-gate */ 12307c478bd9Sstevel@tonic-gate if (IN6_IS_ADDR_UNSPECIFIED(&ire->ire_src_addr_v6)) { 12317c478bd9Sstevel@tonic-gate ip1dbg(("ire_send_v6: delete IRE\n")); 12327c478bd9Sstevel@tonic-gate ire_delete(ire); 12337c478bd9Sstevel@tonic-gate } 12347c478bd9Sstevel@tonic-gate } 12357c478bd9Sstevel@tonic-gate ire_refrele(ire); /* Held in ire_add */ 12367c478bd9Sstevel@tonic-gate } 12377c478bd9Sstevel@tonic-gate 12387c478bd9Sstevel@tonic-gate /* 12397c478bd9Sstevel@tonic-gate * Make sure that IRE bucket does not get too long. 12407c478bd9Sstevel@tonic-gate * This can cause lock up because ire_cache_lookup() 12417c478bd9Sstevel@tonic-gate * may take "forever" to finish. 12427c478bd9Sstevel@tonic-gate * 12437c478bd9Sstevel@tonic-gate * We just remove cnt IREs each time. This means that 12447c478bd9Sstevel@tonic-gate * the bucket length will stay approximately constant, 12457c478bd9Sstevel@tonic-gate * depending on cnt. This should be enough to defend 12467c478bd9Sstevel@tonic-gate * against DoS attack based on creating temporary IREs 12477c478bd9Sstevel@tonic-gate * (for forwarding and non-TCP traffic). 12487c478bd9Sstevel@tonic-gate * 12497c478bd9Sstevel@tonic-gate * Note that new IRE is normally added at the tail of the 12507c478bd9Sstevel@tonic-gate * bucket. This means that we are removing the "oldest" 12517c478bd9Sstevel@tonic-gate * temporary IRE added. Only if there are IREs with 12527c478bd9Sstevel@tonic-gate * the same ire_addr, do we not add it at the tail. Refer 12537c478bd9Sstevel@tonic-gate * to ire_add_v*(). It should be OK for our purpose. 12547c478bd9Sstevel@tonic-gate * 12557c478bd9Sstevel@tonic-gate * For non-temporary cached IREs, we make sure that they 12567c478bd9Sstevel@tonic-gate * have not been used for some time (defined below), they 12577c478bd9Sstevel@tonic-gate * are non-local destinations, and there is no one using 12587c478bd9Sstevel@tonic-gate * them at the moment (refcnt == 1). 12597c478bd9Sstevel@tonic-gate * 12607c478bd9Sstevel@tonic-gate * The above means that the IRE bucket length may become 12617c478bd9Sstevel@tonic-gate * very long, consisting of mostly non-temporary IREs. 12627c478bd9Sstevel@tonic-gate * This can happen when the hash function does a bad job 12637c478bd9Sstevel@tonic-gate * so that most TCP connections cluster to a specific bucket. 12647c478bd9Sstevel@tonic-gate * This "hopefully" should never happen. It can also 12657c478bd9Sstevel@tonic-gate * happen if most TCP connections have very long lives. 12667c478bd9Sstevel@tonic-gate * Even with the minimal hash table size of 256, there 12677c478bd9Sstevel@tonic-gate * has to be a lot of such connections to make the bucket 12687c478bd9Sstevel@tonic-gate * length unreasonably long. This should probably not 12697c478bd9Sstevel@tonic-gate * happen either. The third can when this can happen is 12707c478bd9Sstevel@tonic-gate * when the machine is under attack, such as SYN flooding. 12717c478bd9Sstevel@tonic-gate * TCP should already have the proper mechanism to protect 12727c478bd9Sstevel@tonic-gate * that. So we should be safe. 12737c478bd9Sstevel@tonic-gate * 12747c478bd9Sstevel@tonic-gate * This function is called by ire_add_then_send() after 12757c478bd9Sstevel@tonic-gate * a new IRE is added and the packet is sent. 12767c478bd9Sstevel@tonic-gate * 12777c478bd9Sstevel@tonic-gate * The idle cutoff interval is set to 60s. It can be 12787c478bd9Sstevel@tonic-gate * changed using /etc/system. 12797c478bd9Sstevel@tonic-gate */ 12807c478bd9Sstevel@tonic-gate uint32_t ire_idle_cutoff_interval = 60000; 12817c478bd9Sstevel@tonic-gate 12827c478bd9Sstevel@tonic-gate static void 12837c478bd9Sstevel@tonic-gate ire_cache_cleanup(irb_t *irb, uint32_t threshold, int cnt) 12847c478bd9Sstevel@tonic-gate { 12857c478bd9Sstevel@tonic-gate ire_t *ire; 12867c478bd9Sstevel@tonic-gate int tmp_cnt = cnt; 12877c478bd9Sstevel@tonic-gate clock_t cut_off = drv_usectohz(ire_idle_cutoff_interval * 1000); 12887c478bd9Sstevel@tonic-gate 12897c478bd9Sstevel@tonic-gate /* 12907c478bd9Sstevel@tonic-gate * irb is NULL if the IRE is not added to the hash. This 12915c0b7edeSseb * happens when IRE_MARK_NOADD is set in ire_add_then_send(). 12927c478bd9Sstevel@tonic-gate */ 12937c478bd9Sstevel@tonic-gate if (irb == NULL) 12947c478bd9Sstevel@tonic-gate return; 12957c478bd9Sstevel@tonic-gate 12967c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 12977c478bd9Sstevel@tonic-gate if (irb->irb_tmp_ire_cnt > threshold) { 12987c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL && tmp_cnt > 0; 12997c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 13007c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_CONDEMNED) 13017c478bd9Sstevel@tonic-gate continue; 13027c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_TEMPORARY) { 13037c478bd9Sstevel@tonic-gate ASSERT(ire->ire_type == IRE_CACHE); 13047c478bd9Sstevel@tonic-gate ire_delete(ire); 13057c478bd9Sstevel@tonic-gate tmp_cnt--; 13067c478bd9Sstevel@tonic-gate } 13077c478bd9Sstevel@tonic-gate } 13087c478bd9Sstevel@tonic-gate } 13097c478bd9Sstevel@tonic-gate if (irb->irb_ire_cnt - irb->irb_tmp_ire_cnt > threshold) { 13107c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL && cnt > 0; 13117c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 1312f4b3ec61Sdh155122 if (ire->ire_marks & IRE_MARK_CONDEMNED) 1313f4b3ec61Sdh155122 continue; 1314f4b3ec61Sdh155122 if (ire->ire_ipversion == IPV4_VERSION) { 1315f4b3ec61Sdh155122 if (ire->ire_gateway_addr == 0) 1316f4b3ec61Sdh155122 continue; 1317f4b3ec61Sdh155122 } else { 1318f4b3ec61Sdh155122 if (IN6_IS_ADDR_UNSPECIFIED( 1319f4b3ec61Sdh155122 &ire->ire_gateway_addr_v6)) 13207c478bd9Sstevel@tonic-gate continue; 13217c478bd9Sstevel@tonic-gate } 13227c478bd9Sstevel@tonic-gate if ((ire->ire_type == IRE_CACHE) && 13237c478bd9Sstevel@tonic-gate (lbolt - ire->ire_last_used_time > cut_off) && 13247c478bd9Sstevel@tonic-gate (ire->ire_refcnt == 1)) { 13257c478bd9Sstevel@tonic-gate ire_delete(ire); 13267c478bd9Sstevel@tonic-gate cnt--; 13277c478bd9Sstevel@tonic-gate } 13287c478bd9Sstevel@tonic-gate } 13297c478bd9Sstevel@tonic-gate } 13307c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 13317c478bd9Sstevel@tonic-gate } 13327c478bd9Sstevel@tonic-gate 13337c478bd9Sstevel@tonic-gate /* 13347c478bd9Sstevel@tonic-gate * ire_add_then_send is called when a new IRE has been created in order to 13357c478bd9Sstevel@tonic-gate * route an outgoing packet. Typically, it is called from ip_wput when 13367c478bd9Sstevel@tonic-gate * a response comes back down from a resolver. We add the IRE, and then 13377c478bd9Sstevel@tonic-gate * possibly run the packet through ip_wput or ip_rput, as appropriate. 13387c478bd9Sstevel@tonic-gate * However, we do not add the newly created IRE in the cache when 13397c478bd9Sstevel@tonic-gate * IRE_MARK_NOADD is set in the IRE. IRE_MARK_NOADD is set at 13405c0b7edeSseb * ip_newroute_ipif(). The ires with IRE_MARK_NOADD are ire_refrele'd by 13415c0b7edeSseb * ip_wput_ire() and get deleted. 13427c478bd9Sstevel@tonic-gate * Multirouting support: the packet is silently discarded when the new IRE 13437c478bd9Sstevel@tonic-gate * holds the RTF_MULTIRT flag, but is not the first IRE to be added with the 13447c478bd9Sstevel@tonic-gate * RTF_MULTIRT flag for the same destination address. 13457c478bd9Sstevel@tonic-gate * In this case, we just want to register this additional ire without 13467c478bd9Sstevel@tonic-gate * sending the packet, as it has already been replicated through 13477c478bd9Sstevel@tonic-gate * existing multirt routes in ip_wput(). 13487c478bd9Sstevel@tonic-gate */ 13497c478bd9Sstevel@tonic-gate void 13507c478bd9Sstevel@tonic-gate ire_add_then_send(queue_t *q, ire_t *ire, mblk_t *mp) 13517c478bd9Sstevel@tonic-gate { 13527c478bd9Sstevel@tonic-gate irb_t *irb; 13537c478bd9Sstevel@tonic-gate boolean_t drop = B_FALSE; 13547c478bd9Sstevel@tonic-gate /* LINTED : set but not used in function */ 13557c478bd9Sstevel@tonic-gate boolean_t mctl_present; 13567c478bd9Sstevel@tonic-gate mblk_t *first_mp = NULL; 13577c478bd9Sstevel@tonic-gate mblk_t *save_mp = NULL; 13587c478bd9Sstevel@tonic-gate ire_t *dst_ire; 13597c478bd9Sstevel@tonic-gate ipha_t *ipha; 13607c478bd9Sstevel@tonic-gate ip6_t *ip6h; 1361f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 13627c478bd9Sstevel@tonic-gate 13637c478bd9Sstevel@tonic-gate if (mp != NULL) { 13647c478bd9Sstevel@tonic-gate /* 13657c478bd9Sstevel@tonic-gate * We first have to retrieve the destination address carried 13667c478bd9Sstevel@tonic-gate * by the packet. 13677c478bd9Sstevel@tonic-gate * We can't rely on ire as it can be related to a gateway. 13687c478bd9Sstevel@tonic-gate * The destination address will help in determining if 13697c478bd9Sstevel@tonic-gate * other RTF_MULTIRT ires are already registered. 13707c478bd9Sstevel@tonic-gate * 13717c478bd9Sstevel@tonic-gate * We first need to know where we are going : v4 or V6. 13727c478bd9Sstevel@tonic-gate * the ire version is enough, as there is no risk that 13737c478bd9Sstevel@tonic-gate * we resolve an IPv6 address with an IPv4 ire 13747c478bd9Sstevel@tonic-gate * or vice versa. 13757c478bd9Sstevel@tonic-gate */ 13767c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 13777c478bd9Sstevel@tonic-gate EXTRACT_PKT_MP(mp, first_mp, mctl_present); 13787c478bd9Sstevel@tonic-gate ipha = (ipha_t *)mp->b_rptr; 13797c478bd9Sstevel@tonic-gate save_mp = mp; 13807c478bd9Sstevel@tonic-gate mp = first_mp; 13817c478bd9Sstevel@tonic-gate 13827c478bd9Sstevel@tonic-gate dst_ire = ire_cache_lookup(ipha->ipha_dst, 1383f4b3ec61Sdh155122 ire->ire_zoneid, MBLK_GETLABEL(mp), ipst); 13847c478bd9Sstevel@tonic-gate } else { 1385c793af95Ssangeeta ASSERT(ire->ire_ipversion == IPV6_VERSION); 13867c478bd9Sstevel@tonic-gate /* 13877c478bd9Sstevel@tonic-gate * Get a pointer to the beginning of the IPv6 header. 13887c478bd9Sstevel@tonic-gate * Ignore leading IPsec control mblks. 13897c478bd9Sstevel@tonic-gate */ 13907c478bd9Sstevel@tonic-gate first_mp = mp; 13917c478bd9Sstevel@tonic-gate if (mp->b_datap->db_type == M_CTL) { 13927c478bd9Sstevel@tonic-gate mp = mp->b_cont; 13937c478bd9Sstevel@tonic-gate } 13947c478bd9Sstevel@tonic-gate ip6h = (ip6_t *)mp->b_rptr; 13957c478bd9Sstevel@tonic-gate save_mp = mp; 13967c478bd9Sstevel@tonic-gate mp = first_mp; 13977c478bd9Sstevel@tonic-gate dst_ire = ire_cache_lookup_v6(&ip6h->ip6_dst, 1398f4b3ec61Sdh155122 ire->ire_zoneid, MBLK_GETLABEL(mp), ipst); 13997c478bd9Sstevel@tonic-gate } 14007c478bd9Sstevel@tonic-gate if (dst_ire != NULL) { 14017c478bd9Sstevel@tonic-gate if (dst_ire->ire_flags & RTF_MULTIRT) { 14027c478bd9Sstevel@tonic-gate /* 14037c478bd9Sstevel@tonic-gate * At least one resolved multirt route 14047c478bd9Sstevel@tonic-gate * already exists for the destination, 14057c478bd9Sstevel@tonic-gate * don't sent this packet: either drop it 14067c478bd9Sstevel@tonic-gate * or complete the pending resolution, 14077c478bd9Sstevel@tonic-gate * depending on the ire. 14087c478bd9Sstevel@tonic-gate */ 14097c478bd9Sstevel@tonic-gate drop = B_TRUE; 14107c478bd9Sstevel@tonic-gate } 14117c478bd9Sstevel@tonic-gate ip1dbg(("ire_add_then_send: dst_ire %p " 14127c478bd9Sstevel@tonic-gate "[dst %08x, gw %08x], drop %d\n", 14137c478bd9Sstevel@tonic-gate (void *)dst_ire, 14147c478bd9Sstevel@tonic-gate (dst_ire->ire_ipversion == IPV4_VERSION) ? \ 14157c478bd9Sstevel@tonic-gate ntohl(dst_ire->ire_addr) : \ 14167c478bd9Sstevel@tonic-gate ntohl(V4_PART_OF_V6(dst_ire->ire_addr_v6)), 14177c478bd9Sstevel@tonic-gate (dst_ire->ire_ipversion == IPV4_VERSION) ? \ 14187c478bd9Sstevel@tonic-gate ntohl(dst_ire->ire_gateway_addr) : \ 14197c478bd9Sstevel@tonic-gate ntohl(V4_PART_OF_V6( 14207c478bd9Sstevel@tonic-gate dst_ire->ire_gateway_addr_v6)), 14217c478bd9Sstevel@tonic-gate drop)); 14227c478bd9Sstevel@tonic-gate ire_refrele(dst_ire); 14237c478bd9Sstevel@tonic-gate } 14247c478bd9Sstevel@tonic-gate } 14257c478bd9Sstevel@tonic-gate 14267c478bd9Sstevel@tonic-gate if (!(ire->ire_marks & IRE_MARK_NOADD)) { 14275c0b7edeSseb /* Regular packets with cache bound ires are here. */ 1428c793af95Ssangeeta (void) ire_add(&ire, NULL, NULL, NULL, B_FALSE); 14297c478bd9Sstevel@tonic-gate 14307c478bd9Sstevel@tonic-gate if (ire == NULL) { 14317c478bd9Sstevel@tonic-gate mp->b_prev = NULL; 14327c478bd9Sstevel@tonic-gate mp->b_next = NULL; 14337c478bd9Sstevel@tonic-gate MULTIRT_DEBUG_UNTAG(mp); 14347c478bd9Sstevel@tonic-gate freemsg(mp); 14357c478bd9Sstevel@tonic-gate return; 14367c478bd9Sstevel@tonic-gate } 14377c478bd9Sstevel@tonic-gate if (mp == NULL) { 14387c478bd9Sstevel@tonic-gate ire_refrele(ire); /* Held in ire_add_v4/v6 */ 14397c478bd9Sstevel@tonic-gate return; 14407c478bd9Sstevel@tonic-gate } 14417c478bd9Sstevel@tonic-gate } 14427c478bd9Sstevel@tonic-gate if (drop) { 14437c478bd9Sstevel@tonic-gate /* 14447c478bd9Sstevel@tonic-gate * If we're adding an RTF_MULTIRT ire, the resolution 14457c478bd9Sstevel@tonic-gate * is over: we just drop the packet. 14467c478bd9Sstevel@tonic-gate */ 14477c478bd9Sstevel@tonic-gate if (ire->ire_flags & RTF_MULTIRT) { 14487c478bd9Sstevel@tonic-gate if (save_mp) { 14497c478bd9Sstevel@tonic-gate save_mp->b_prev = NULL; 14507c478bd9Sstevel@tonic-gate save_mp->b_next = NULL; 14517c478bd9Sstevel@tonic-gate } 14527c478bd9Sstevel@tonic-gate MULTIRT_DEBUG_UNTAG(mp); 14537c478bd9Sstevel@tonic-gate freemsg(mp); 14547c478bd9Sstevel@tonic-gate } else { 14557c478bd9Sstevel@tonic-gate /* 14567c478bd9Sstevel@tonic-gate * Otherwise, we're adding the ire to a gateway 14577c478bd9Sstevel@tonic-gate * for a multirt route. 14587c478bd9Sstevel@tonic-gate * Invoke ip_newroute() to complete the resolution 14597c478bd9Sstevel@tonic-gate * of the route. We will then come back here and 14607c478bd9Sstevel@tonic-gate * finally drop this packet in the above code. 14617c478bd9Sstevel@tonic-gate */ 14627c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 14637c478bd9Sstevel@tonic-gate /* 14647c478bd9Sstevel@tonic-gate * TODO: in order for CGTP to work in non-global 14657c478bd9Sstevel@tonic-gate * zones, ip_newroute() must create the IRE 14667c478bd9Sstevel@tonic-gate * cache in the zone indicated by 14677c478bd9Sstevel@tonic-gate * ire->ire_zoneid. 14687c478bd9Sstevel@tonic-gate */ 14695c0b7edeSseb ip_newroute(q, mp, ipha->ipha_dst, 14705597b60aSnordmark (CONN_Q(q) ? Q_TO_CONN(q) : NULL), 1471f4b3ec61Sdh155122 ire->ire_zoneid, ipst); 14727c478bd9Sstevel@tonic-gate } else { 1473c793af95Ssangeeta ASSERT(ire->ire_ipversion == IPV6_VERSION); 14747c478bd9Sstevel@tonic-gate ip_newroute_v6(q, mp, &ip6h->ip6_dst, NULL, 1475f4b3ec61Sdh155122 NULL, ire->ire_zoneid, ipst); 14767c478bd9Sstevel@tonic-gate } 14777c478bd9Sstevel@tonic-gate } 14787c478bd9Sstevel@tonic-gate 14797c478bd9Sstevel@tonic-gate ire_refrele(ire); /* As done by ire_send(). */ 14807c478bd9Sstevel@tonic-gate return; 14817c478bd9Sstevel@tonic-gate } 14827c478bd9Sstevel@tonic-gate /* 14837c478bd9Sstevel@tonic-gate * Need to remember ire_bucket here as ire_send*() may delete 14847c478bd9Sstevel@tonic-gate * the ire so we cannot reference it after that. 14857c478bd9Sstevel@tonic-gate */ 14867c478bd9Sstevel@tonic-gate irb = ire->ire_bucket; 14877c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 14887c478bd9Sstevel@tonic-gate ire_send_v6(q, mp, ire); 14897c478bd9Sstevel@tonic-gate /* 14907c478bd9Sstevel@tonic-gate * Clean up more than 1 IRE so that the clean up does not 14917c478bd9Sstevel@tonic-gate * need to be done every time when a new IRE is added and 14927c478bd9Sstevel@tonic-gate * the threshold is reached. 14937c478bd9Sstevel@tonic-gate */ 14947c478bd9Sstevel@tonic-gate ire_cache_cleanup(irb, ip6_ire_max_bucket_cnt, 2); 14957c478bd9Sstevel@tonic-gate } else { 14967c478bd9Sstevel@tonic-gate ire_send(q, mp, ire); 14977c478bd9Sstevel@tonic-gate ire_cache_cleanup(irb, ip_ire_max_bucket_cnt, 2); 14987c478bd9Sstevel@tonic-gate } 14997c478bd9Sstevel@tonic-gate } 15007c478bd9Sstevel@tonic-gate 15017c478bd9Sstevel@tonic-gate /* 15027c478bd9Sstevel@tonic-gate * Initialize the ire that is specific to IPv4 part and call 15037c478bd9Sstevel@tonic-gate * ire_init_common to finish it. 15047c478bd9Sstevel@tonic-gate */ 15057c478bd9Sstevel@tonic-gate ire_t * 15067c478bd9Sstevel@tonic-gate ire_init(ire_t *ire, uchar_t *addr, uchar_t *mask, uchar_t *src_addr, 15075c0b7edeSseb uchar_t *gateway, uint_t *max_fragp, nce_t *src_nce, queue_t *rfq, 15085c0b7edeSseb queue_t *stq, ushort_t type, ipif_t *ipif, ipaddr_t cmask, uint32_t phandle, 15095c0b7edeSseb uint32_t ihandle, uint32_t flags, const iulp_t *ulp_info, tsol_gc_t *gc, 15105c0b7edeSseb tsol_gcgrp_t *gcgrp, ip_stack_t *ipst) 15117c478bd9Sstevel@tonic-gate { 151245916cd2Sjpk /* 151345916cd2Sjpk * Reject IRE security attribute creation/initialization 151445916cd2Sjpk * if system is not running in Trusted mode. 151545916cd2Sjpk */ 151645916cd2Sjpk if ((gc != NULL || gcgrp != NULL) && !is_system_labeled()) 151745916cd2Sjpk return (NULL); 151845916cd2Sjpk 15197c478bd9Sstevel@tonic-gate 1520f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_alloced); 15217c478bd9Sstevel@tonic-gate 15227c478bd9Sstevel@tonic-gate if (addr != NULL) 15237c478bd9Sstevel@tonic-gate bcopy(addr, &ire->ire_addr, IP_ADDR_LEN); 15247c478bd9Sstevel@tonic-gate if (src_addr != NULL) 15257c478bd9Sstevel@tonic-gate bcopy(src_addr, &ire->ire_src_addr, IP_ADDR_LEN); 15267c478bd9Sstevel@tonic-gate if (mask != NULL) { 15277c478bd9Sstevel@tonic-gate bcopy(mask, &ire->ire_mask, IP_ADDR_LEN); 15287c478bd9Sstevel@tonic-gate ire->ire_masklen = ip_mask_to_plen(ire->ire_mask); 15297c478bd9Sstevel@tonic-gate } 15307c478bd9Sstevel@tonic-gate if (gateway != NULL) { 15317c478bd9Sstevel@tonic-gate bcopy(gateway, &ire->ire_gateway_addr, IP_ADDR_LEN); 15327c478bd9Sstevel@tonic-gate } 15337c478bd9Sstevel@tonic-gate 15347c478bd9Sstevel@tonic-gate if (type == IRE_CACHE) 15357c478bd9Sstevel@tonic-gate ire->ire_cmask = cmask; 15367c478bd9Sstevel@tonic-gate 153745916cd2Sjpk /* ire_init_common will free the mblks upon encountering any failure */ 15385c0b7edeSseb if (!ire_init_common(ire, max_fragp, src_nce, rfq, stq, type, ipif, 15395c0b7edeSseb phandle, ihandle, flags, IPV4_VERSION, ulp_info, gc, gcgrp, ipst)) 154045916cd2Sjpk return (NULL); 15417c478bd9Sstevel@tonic-gate 15427c478bd9Sstevel@tonic-gate return (ire); 15437c478bd9Sstevel@tonic-gate } 15447c478bd9Sstevel@tonic-gate 15457c478bd9Sstevel@tonic-gate /* 15467c478bd9Sstevel@tonic-gate * Similar to ire_create except that it is called only when 15477c478bd9Sstevel@tonic-gate * we want to allocate ire as an mblk e.g. we have an external 15487c478bd9Sstevel@tonic-gate * resolver ARP. 15497c478bd9Sstevel@tonic-gate */ 15507c478bd9Sstevel@tonic-gate ire_t * 15517c478bd9Sstevel@tonic-gate ire_create_mp(uchar_t *addr, uchar_t *mask, uchar_t *src_addr, uchar_t *gateway, 15525c0b7edeSseb uint_t max_frag, nce_t *src_nce, queue_t *rfq, queue_t *stq, ushort_t type, 15535c0b7edeSseb ipif_t *ipif, ipaddr_t cmask, uint32_t phandle, uint32_t ihandle, 15545c0b7edeSseb uint32_t flags, const iulp_t *ulp_info, tsol_gc_t *gc, tsol_gcgrp_t *gcgrp, 1555f4b3ec61Sdh155122 ip_stack_t *ipst) 15567c478bd9Sstevel@tonic-gate { 1557c793af95Ssangeeta ire_t *ire, *buf; 15587c478bd9Sstevel@tonic-gate ire_t *ret_ire; 15597c478bd9Sstevel@tonic-gate mblk_t *mp; 1560c793af95Ssangeeta size_t bufsize; 1561c793af95Ssangeeta frtn_t *frtnp; 1562c793af95Ssangeeta ill_t *ill; 15637c478bd9Sstevel@tonic-gate 1564c793af95Ssangeeta bufsize = sizeof (ire_t) + sizeof (frtn_t); 1565c793af95Ssangeeta buf = kmem_alloc(bufsize, KM_NOSLEEP); 1566c793af95Ssangeeta if (buf == NULL) { 15677c478bd9Sstevel@tonic-gate ip1dbg(("ire_create_mp: alloc failed\n")); 15687c478bd9Sstevel@tonic-gate return (NULL); 15697c478bd9Sstevel@tonic-gate } 1570c793af95Ssangeeta frtnp = (frtn_t *)(buf + 1); 1571c793af95Ssangeeta frtnp->free_arg = (caddr_t)buf; 1572c793af95Ssangeeta frtnp->free_func = ire_freemblk; 15737c478bd9Sstevel@tonic-gate 1574c793af95Ssangeeta /* 1575c793af95Ssangeeta * Allocate the new IRE. The ire created will hold a ref on 1576c793af95Ssangeeta * an nce_t after ire_nce_init, and this ref must either be 1577c793af95Ssangeeta * (a) transferred to the ire_cache entry created when ire_add_v4 1578c793af95Ssangeeta * is called after successful arp resolution, or, 1579c793af95Ssangeeta * (b) released, when arp resolution fails 1580c793af95Ssangeeta * Case (b) is handled in ire_freemblk() which will be called 1581c793af95Ssangeeta * when mp is freed as a result of failed arp. 1582c793af95Ssangeeta */ 1583c793af95Ssangeeta mp = esballoc((unsigned char *)buf, bufsize, BPRI_MED, frtnp); 1584c793af95Ssangeeta if (mp == NULL) { 1585c793af95Ssangeeta ip1dbg(("ire_create_mp: alloc failed\n")); 1586c793af95Ssangeeta kmem_free(buf, bufsize); 1587c793af95Ssangeeta return (NULL); 1588c793af95Ssangeeta } 15897c478bd9Sstevel@tonic-gate ire = (ire_t *)mp->b_rptr; 15907c478bd9Sstevel@tonic-gate mp->b_wptr = (uchar_t *)&ire[1]; 15917c478bd9Sstevel@tonic-gate 15927c478bd9Sstevel@tonic-gate /* Start clean. */ 15937c478bd9Sstevel@tonic-gate *ire = ire_null; 15947c478bd9Sstevel@tonic-gate ire->ire_mp = mp; 15957c478bd9Sstevel@tonic-gate mp->b_datap->db_type = IRE_DB_TYPE; 1596c793af95Ssangeeta ire->ire_marks |= IRE_MARK_UNCACHED; 15977c478bd9Sstevel@tonic-gate 15985c0b7edeSseb ret_ire = ire_init(ire, addr, mask, src_addr, gateway, NULL, src_nce, 15995c0b7edeSseb rfq, stq, type, ipif, cmask, phandle, ihandle, flags, ulp_info, gc, 16005c0b7edeSseb gcgrp, ipst); 16017c478bd9Sstevel@tonic-gate 160253bec8caSsowmini ill = (ill_t *)(stq->q_ptr); 16037c478bd9Sstevel@tonic-gate if (ret_ire == NULL) { 1604f4b3ec61Sdh155122 /* ire_freemblk needs these set */ 160553bec8caSsowmini ire->ire_stq_ifindex = ill->ill_phyint->phyint_ifindex; 1606f4b3ec61Sdh155122 ire->ire_ipst = ipst; 16077c478bd9Sstevel@tonic-gate freeb(ire->ire_mp); 16087c478bd9Sstevel@tonic-gate return (NULL); 16097c478bd9Sstevel@tonic-gate } 1610c793af95Ssangeeta ret_ire->ire_stq_ifindex = ill->ill_phyint->phyint_ifindex; 16117c478bd9Sstevel@tonic-gate ASSERT(ret_ire == ire); 16127c478bd9Sstevel@tonic-gate /* 16137c478bd9Sstevel@tonic-gate * ire_max_frag is normally zero here and is atomically set 16147c478bd9Sstevel@tonic-gate * under the irebucket lock in ire_add_v[46] except for the 16157c478bd9Sstevel@tonic-gate * case of IRE_MARK_NOADD. In that event the the ire_max_frag 16167c478bd9Sstevel@tonic-gate * is non-zero here. 16177c478bd9Sstevel@tonic-gate */ 16187c478bd9Sstevel@tonic-gate ire->ire_max_frag = max_frag; 16197c478bd9Sstevel@tonic-gate return (ire); 16207c478bd9Sstevel@tonic-gate } 16217c478bd9Sstevel@tonic-gate 16227c478bd9Sstevel@tonic-gate /* 16237c478bd9Sstevel@tonic-gate * ire_create is called to allocate and initialize a new IRE. 16247c478bd9Sstevel@tonic-gate * 16257c478bd9Sstevel@tonic-gate * NOTE : This is called as writer sometimes though not required 16267c478bd9Sstevel@tonic-gate * by this function. 16277c478bd9Sstevel@tonic-gate */ 16287c478bd9Sstevel@tonic-gate ire_t * 16297c478bd9Sstevel@tonic-gate ire_create(uchar_t *addr, uchar_t *mask, uchar_t *src_addr, uchar_t *gateway, 16305c0b7edeSseb uint_t *max_fragp, nce_t *src_nce, queue_t *rfq, queue_t *stq, 16315c0b7edeSseb ushort_t type, ipif_t *ipif, ipaddr_t cmask, uint32_t phandle, 16325c0b7edeSseb uint32_t ihandle, uint32_t flags, const iulp_t *ulp_info, tsol_gc_t *gc, 16335c0b7edeSseb tsol_gcgrp_t *gcgrp, ip_stack_t *ipst) 16347c478bd9Sstevel@tonic-gate { 16357c478bd9Sstevel@tonic-gate ire_t *ire; 16367c478bd9Sstevel@tonic-gate ire_t *ret_ire; 16377c478bd9Sstevel@tonic-gate 16387c478bd9Sstevel@tonic-gate ire = kmem_cache_alloc(ire_cache, KM_NOSLEEP); 16397c478bd9Sstevel@tonic-gate if (ire == NULL) { 16407c478bd9Sstevel@tonic-gate ip1dbg(("ire_create: alloc failed\n")); 16417c478bd9Sstevel@tonic-gate return (NULL); 16427c478bd9Sstevel@tonic-gate } 16437c478bd9Sstevel@tonic-gate *ire = ire_null; 16447c478bd9Sstevel@tonic-gate 16455c0b7edeSseb ret_ire = ire_init(ire, addr, mask, src_addr, gateway, max_fragp, 16465c0b7edeSseb src_nce, rfq, stq, type, ipif, cmask, phandle, ihandle, flags, 16475c0b7edeSseb ulp_info, gc, gcgrp, ipst); 16487c478bd9Sstevel@tonic-gate 16497c478bd9Sstevel@tonic-gate if (ret_ire == NULL) { 16507c478bd9Sstevel@tonic-gate kmem_cache_free(ire_cache, ire); 16517c478bd9Sstevel@tonic-gate return (NULL); 16527c478bd9Sstevel@tonic-gate } 16537c478bd9Sstevel@tonic-gate ASSERT(ret_ire == ire); 16547c478bd9Sstevel@tonic-gate return (ire); 16557c478bd9Sstevel@tonic-gate } 16567c478bd9Sstevel@tonic-gate 16577c478bd9Sstevel@tonic-gate 16587c478bd9Sstevel@tonic-gate /* 16597c478bd9Sstevel@tonic-gate * Common to IPv4 and IPv6 16607c478bd9Sstevel@tonic-gate */ 166145916cd2Sjpk boolean_t 166254da8755Ssowmini ire_init_common(ire_t *ire, uint_t *max_fragp, nce_t *src_nce, queue_t *rfq, 16635c0b7edeSseb queue_t *stq, ushort_t type, ipif_t *ipif, uint32_t phandle, 166454da8755Ssowmini uint32_t ihandle, uint32_t flags, uchar_t ipversion, const iulp_t *ulp_info, 166554da8755Ssowmini tsol_gc_t *gc, tsol_gcgrp_t *gcgrp, ip_stack_t *ipst) 16667c478bd9Sstevel@tonic-gate { 16677c478bd9Sstevel@tonic-gate ire->ire_max_fragp = max_fragp; 1668f4b3ec61Sdh155122 ire->ire_frag_flag |= (ipst->ips_ip_path_mtu_discovery) ? IPH_DF : 0; 16697c478bd9Sstevel@tonic-gate 167045916cd2Sjpk #ifdef DEBUG 167145916cd2Sjpk if (ipif != NULL) { 16727c478bd9Sstevel@tonic-gate if (ipif->ipif_isv6) 16737c478bd9Sstevel@tonic-gate ASSERT(ipversion == IPV6_VERSION); 16747c478bd9Sstevel@tonic-gate else 16757c478bd9Sstevel@tonic-gate ASSERT(ipversion == IPV4_VERSION); 16767c478bd9Sstevel@tonic-gate } 167745916cd2Sjpk #endif /* DEBUG */ 167845916cd2Sjpk 167945916cd2Sjpk /* 168045916cd2Sjpk * Create/initialize IRE security attribute only in Trusted mode; 168145916cd2Sjpk * if the passed in gc/gcgrp is non-NULL, we expect that the caller 168245916cd2Sjpk * has held a reference to it and will release it when this routine 168345916cd2Sjpk * returns a failure, otherwise we own the reference. We do this 168445916cd2Sjpk * prior to initializing the rest IRE fields. 1685dc3879f9Sjarrett * 1686dc3879f9Sjarrett * Don't allocate ire_gw_secattr for the resolver case to prevent 1687dc3879f9Sjarrett * memory leak (in case of external resolution failure). We'll 1688dc3879f9Sjarrett * allocate it after a successful external resolution, in ire_add(). 1689dc3879f9Sjarrett * Note that ire->ire_mp != NULL here means this ire is headed 1690dc3879f9Sjarrett * to an external resolver. 169145916cd2Sjpk */ 169245916cd2Sjpk if (is_system_labeled()) { 169345916cd2Sjpk if ((type & (IRE_LOCAL | IRE_LOOPBACK | IRE_BROADCAST | 169445916cd2Sjpk IRE_INTERFACE)) != 0) { 169545916cd2Sjpk /* release references on behalf of caller */ 169645916cd2Sjpk if (gc != NULL) 169745916cd2Sjpk GC_REFRELE(gc); 169845916cd2Sjpk if (gcgrp != NULL) 169945916cd2Sjpk GCGRP_REFRELE(gcgrp); 1700dc3879f9Sjarrett } else if ((ire->ire_mp == NULL) && 1701dc3879f9Sjarrett tsol_ire_init_gwattr(ire, ipversion, gc, gcgrp) != 0) { 170245916cd2Sjpk return (B_FALSE); 170345916cd2Sjpk } 170445916cd2Sjpk } 17057c478bd9Sstevel@tonic-gate 17067c478bd9Sstevel@tonic-gate ire->ire_stq = stq; 17077c478bd9Sstevel@tonic-gate ire->ire_rfq = rfq; 17087c478bd9Sstevel@tonic-gate ire->ire_type = type; 17097c478bd9Sstevel@tonic-gate ire->ire_flags = RTF_UP | flags; 17107c478bd9Sstevel@tonic-gate ire->ire_ident = TICK_TO_MSEC(lbolt); 17117c478bd9Sstevel@tonic-gate bcopy(ulp_info, &ire->ire_uinfo, sizeof (iulp_t)); 17127c478bd9Sstevel@tonic-gate 17137c478bd9Sstevel@tonic-gate ire->ire_tire_mark = ire->ire_ob_pkt_count + ire->ire_ib_pkt_count; 17147c478bd9Sstevel@tonic-gate ire->ire_last_used_time = lbolt; 17157c478bd9Sstevel@tonic-gate ire->ire_create_time = (uint32_t)gethrestime_sec(); 17167c478bd9Sstevel@tonic-gate 17177c478bd9Sstevel@tonic-gate /* 17187c478bd9Sstevel@tonic-gate * If this IRE is an IRE_CACHE, inherit the handles from the 17197c478bd9Sstevel@tonic-gate * parent IREs. For others in the forwarding table, assign appropriate 17207c478bd9Sstevel@tonic-gate * new ones. 17217c478bd9Sstevel@tonic-gate * 17227c478bd9Sstevel@tonic-gate * The mutex protecting ire_handle is because ire_create is not always 17237c478bd9Sstevel@tonic-gate * called as a writer. 17247c478bd9Sstevel@tonic-gate */ 17257c478bd9Sstevel@tonic-gate if (ire->ire_type & IRE_OFFSUBNET) { 1726f4b3ec61Sdh155122 mutex_enter(&ipst->ips_ire_handle_lock); 1727f4b3ec61Sdh155122 ire->ire_phandle = (uint32_t)ipst->ips_ire_handle++; 1728f4b3ec61Sdh155122 mutex_exit(&ipst->ips_ire_handle_lock); 17297c478bd9Sstevel@tonic-gate } else if (ire->ire_type & IRE_INTERFACE) { 1730f4b3ec61Sdh155122 mutex_enter(&ipst->ips_ire_handle_lock); 1731f4b3ec61Sdh155122 ire->ire_ihandle = (uint32_t)ipst->ips_ire_handle++; 1732f4b3ec61Sdh155122 mutex_exit(&ipst->ips_ire_handle_lock); 17337c478bd9Sstevel@tonic-gate } else if (ire->ire_type == IRE_CACHE) { 17347c478bd9Sstevel@tonic-gate ire->ire_phandle = phandle; 17357c478bd9Sstevel@tonic-gate ire->ire_ihandle = ihandle; 17367c478bd9Sstevel@tonic-gate } 17377c478bd9Sstevel@tonic-gate ire->ire_ipif = ipif; 17387c478bd9Sstevel@tonic-gate if (ipif != NULL) { 17397c478bd9Sstevel@tonic-gate ire->ire_ipif_seqid = ipif->ipif_seqid; 17407c478bd9Sstevel@tonic-gate ire->ire_zoneid = ipif->ipif_zoneid; 17417c478bd9Sstevel@tonic-gate } else { 17427c478bd9Sstevel@tonic-gate ire->ire_zoneid = GLOBAL_ZONEID; 17437c478bd9Sstevel@tonic-gate } 17447c478bd9Sstevel@tonic-gate ire->ire_ipversion = ipversion; 17457c478bd9Sstevel@tonic-gate mutex_init(&ire->ire_lock, NULL, MUTEX_DEFAULT, NULL); 1746c793af95Ssangeeta if (ipversion == IPV4_VERSION) { 174754da8755Ssowmini /* 174854da8755Ssowmini * IPv6 initializes the ire_nce in ire_add_v6, which expects 174954da8755Ssowmini * to find the ire_nce to be null when it is called. 175054da8755Ssowmini */ 175154da8755Ssowmini if (ire_nce_init(ire, src_nce) != 0) { 1752c793af95Ssangeeta /* some failure occurred. propagate error back */ 1753c793af95Ssangeeta return (B_FALSE); 1754c793af95Ssangeeta } 1755c793af95Ssangeeta } 1756c793af95Ssangeeta ire->ire_refcnt = 1; 1757f4b3ec61Sdh155122 ire->ire_ipst = ipst; /* No netstack_hold */ 1758*6a8288c7Scarlsonj ire->ire_trace_disable = B_FALSE; 175945916cd2Sjpk 176045916cd2Sjpk return (B_TRUE); 17617c478bd9Sstevel@tonic-gate } 17627c478bd9Sstevel@tonic-gate 17637c478bd9Sstevel@tonic-gate /* 17647c478bd9Sstevel@tonic-gate * This routine is called repeatedly by ipif_up to create broadcast IREs. 17657c478bd9Sstevel@tonic-gate * It is passed a pointer to a slot in an IRE pointer array into which to 17667c478bd9Sstevel@tonic-gate * place the pointer to the new IRE, if indeed we create one. If the 17677c478bd9Sstevel@tonic-gate * IRE corresponding to the address passed in would be a duplicate of an 17687c478bd9Sstevel@tonic-gate * existing one, we don't create the new one. irep is incremented before 17697c478bd9Sstevel@tonic-gate * return only if we do create a new IRE. (Always called as writer.) 17707c478bd9Sstevel@tonic-gate * 17717c478bd9Sstevel@tonic-gate * Note that with the "match_flags" parameter, we can match on either 17727c478bd9Sstevel@tonic-gate * a particular logical interface (MATCH_IRE_IPIF) or for all logical 17737c478bd9Sstevel@tonic-gate * interfaces for a given physical interface (MATCH_IRE_ILL). Currently, 17747c478bd9Sstevel@tonic-gate * we only create broadcast ire's on a per physical interface basis. If 17757c478bd9Sstevel@tonic-gate * someone is going to be mucking with logical interfaces, it is important 17767c478bd9Sstevel@tonic-gate * to call "ipif_check_bcast_ires()" to make sure that any change to a 17777c478bd9Sstevel@tonic-gate * logical interface will not cause critical broadcast IRE's to be deleted. 17787c478bd9Sstevel@tonic-gate */ 17797c478bd9Sstevel@tonic-gate ire_t ** 17807c478bd9Sstevel@tonic-gate ire_check_and_create_bcast(ipif_t *ipif, ipaddr_t addr, ire_t **irep, 17817c478bd9Sstevel@tonic-gate int match_flags) 17827c478bd9Sstevel@tonic-gate { 17837c478bd9Sstevel@tonic-gate ire_t *ire; 17847c478bd9Sstevel@tonic-gate uint64_t check_flags = IPIF_DEPRECATED | IPIF_NOLOCAL | IPIF_ANYCAST; 1785f4b3ec61Sdh155122 ip_stack_t *ipst = ipif->ipif_ill->ill_ipst; 17867c478bd9Sstevel@tonic-gate 17877c478bd9Sstevel@tonic-gate /* 17887c478bd9Sstevel@tonic-gate * No broadcast IREs for the LOOPBACK interface 17897c478bd9Sstevel@tonic-gate * or others such as point to point and IPIF_NOXMIT. 17907c478bd9Sstevel@tonic-gate */ 17917c478bd9Sstevel@tonic-gate if (!(ipif->ipif_flags & IPIF_BROADCAST) || 17927c478bd9Sstevel@tonic-gate (ipif->ipif_flags & IPIF_NOXMIT)) 17937c478bd9Sstevel@tonic-gate return (irep); 17947c478bd9Sstevel@tonic-gate 17957c478bd9Sstevel@tonic-gate /* If this would be a duplicate, don't bother. */ 17967c478bd9Sstevel@tonic-gate if ((ire = ire_ctable_lookup(addr, 0, IRE_BROADCAST, ipif, 1797f4b3ec61Sdh155122 ipif->ipif_zoneid, NULL, match_flags, ipst)) != NULL) { 17987c478bd9Sstevel@tonic-gate /* 17997c478bd9Sstevel@tonic-gate * We look for non-deprecated (and non-anycast, non-nolocal) 18007c478bd9Sstevel@tonic-gate * ipifs as the best choice. ipifs with check_flags matching 18017c478bd9Sstevel@tonic-gate * (deprecated, etc) are used only if non-deprecated ipifs 18027c478bd9Sstevel@tonic-gate * are not available. if the existing ire's ipif is deprecated 18037c478bd9Sstevel@tonic-gate * and the new ipif is non-deprecated, switch to the new ipif 18047c478bd9Sstevel@tonic-gate */ 18057c478bd9Sstevel@tonic-gate if ((!(ire->ire_ipif->ipif_flags & check_flags)) || 18067c478bd9Sstevel@tonic-gate (ipif->ipif_flags & check_flags)) { 18077c478bd9Sstevel@tonic-gate ire_refrele(ire); 18087c478bd9Sstevel@tonic-gate return (irep); 18097c478bd9Sstevel@tonic-gate } 18107c478bd9Sstevel@tonic-gate /* 18117c478bd9Sstevel@tonic-gate * Bcast ires exist in pairs. Both have to be deleted, 18127c478bd9Sstevel@tonic-gate * Since we are exclusive we can make the above assertion. 18137c478bd9Sstevel@tonic-gate * The 1st has to be refrele'd since it was ctable_lookup'd. 18147c478bd9Sstevel@tonic-gate */ 18157c478bd9Sstevel@tonic-gate ASSERT(IAM_WRITER_IPIF(ipif)); 18167c478bd9Sstevel@tonic-gate ASSERT(ire->ire_next->ire_addr == ire->ire_addr); 18177c478bd9Sstevel@tonic-gate ire_delete(ire->ire_next); 18187c478bd9Sstevel@tonic-gate ire_delete(ire); 18197c478bd9Sstevel@tonic-gate ire_refrele(ire); 18207c478bd9Sstevel@tonic-gate } 18217c478bd9Sstevel@tonic-gate 18227c478bd9Sstevel@tonic-gate irep = ire_create_bcast(ipif, addr, irep); 18237c478bd9Sstevel@tonic-gate 18247c478bd9Sstevel@tonic-gate return (irep); 18257c478bd9Sstevel@tonic-gate } 18267c478bd9Sstevel@tonic-gate 18277c478bd9Sstevel@tonic-gate uint_t ip_loopback_mtu = IP_LOOPBACK_MTU; 18287c478bd9Sstevel@tonic-gate 18297c478bd9Sstevel@tonic-gate /* 18307c478bd9Sstevel@tonic-gate * This routine is called from ipif_check_bcast_ires and ire_check_bcast. 18317c478bd9Sstevel@tonic-gate * It leaves all the verifying and deleting to those routines. So it always 18327c478bd9Sstevel@tonic-gate * creates 2 bcast ires and chains them into the ire array passed in. 18337c478bd9Sstevel@tonic-gate */ 18347c478bd9Sstevel@tonic-gate ire_t ** 18357c478bd9Sstevel@tonic-gate ire_create_bcast(ipif_t *ipif, ipaddr_t addr, ire_t **irep) 18367c478bd9Sstevel@tonic-gate { 1837f4b3ec61Sdh155122 ip_stack_t *ipst = ipif->ipif_ill->ill_ipst; 1838f4b3ec61Sdh155122 18397c478bd9Sstevel@tonic-gate *irep++ = ire_create( 18407c478bd9Sstevel@tonic-gate (uchar_t *)&addr, /* dest addr */ 18417c478bd9Sstevel@tonic-gate (uchar_t *)&ip_g_all_ones, /* mask */ 18427c478bd9Sstevel@tonic-gate (uchar_t *)&ipif->ipif_src_addr, /* source addr */ 18437c478bd9Sstevel@tonic-gate NULL, /* no gateway */ 18447c478bd9Sstevel@tonic-gate &ipif->ipif_mtu, /* max frag */ 184554da8755Ssowmini NULL, /* no src nce */ 18467c478bd9Sstevel@tonic-gate ipif->ipif_rq, /* recv-from queue */ 18477c478bd9Sstevel@tonic-gate ipif->ipif_wq, /* send-to queue */ 18487c478bd9Sstevel@tonic-gate IRE_BROADCAST, 18497c478bd9Sstevel@tonic-gate ipif, 18507c478bd9Sstevel@tonic-gate 0, 18517c478bd9Sstevel@tonic-gate 0, 18527c478bd9Sstevel@tonic-gate 0, 18537c478bd9Sstevel@tonic-gate 0, 185445916cd2Sjpk &ire_uinfo_null, 185545916cd2Sjpk NULL, 1856f4b3ec61Sdh155122 NULL, 1857f4b3ec61Sdh155122 ipst); 18587c478bd9Sstevel@tonic-gate 18597c478bd9Sstevel@tonic-gate *irep++ = ire_create( 18607c478bd9Sstevel@tonic-gate (uchar_t *)&addr, /* dest address */ 18617c478bd9Sstevel@tonic-gate (uchar_t *)&ip_g_all_ones, /* mask */ 18627c478bd9Sstevel@tonic-gate (uchar_t *)&ipif->ipif_src_addr, /* source address */ 18637c478bd9Sstevel@tonic-gate NULL, /* no gateway */ 18647c478bd9Sstevel@tonic-gate &ip_loopback_mtu, /* max frag size */ 186554da8755Ssowmini NULL, /* no src_nce */ 18667c478bd9Sstevel@tonic-gate ipif->ipif_rq, /* recv-from queue */ 18677c478bd9Sstevel@tonic-gate NULL, /* no send-to queue */ 18687c478bd9Sstevel@tonic-gate IRE_BROADCAST, /* Needed for fanout in wput */ 18697c478bd9Sstevel@tonic-gate ipif, 18707c478bd9Sstevel@tonic-gate 0, 18717c478bd9Sstevel@tonic-gate 0, 18727c478bd9Sstevel@tonic-gate 0, 18737c478bd9Sstevel@tonic-gate 0, 187445916cd2Sjpk &ire_uinfo_null, 187545916cd2Sjpk NULL, 1876f4b3ec61Sdh155122 NULL, 1877f4b3ec61Sdh155122 ipst); 18787c478bd9Sstevel@tonic-gate 18797c478bd9Sstevel@tonic-gate return (irep); 18807c478bd9Sstevel@tonic-gate } 18817c478bd9Sstevel@tonic-gate 18827c478bd9Sstevel@tonic-gate /* 18837c478bd9Sstevel@tonic-gate * ire_walk routine to delete or update any IRE_CACHE that might contain 18847c478bd9Sstevel@tonic-gate * stale information. 18857c478bd9Sstevel@tonic-gate * The flags state which entries to delete or update. 18867c478bd9Sstevel@tonic-gate * Garbage collection is done separately using kmem alloc callbacks to 18877c478bd9Sstevel@tonic-gate * ip_trash_ire_reclaim. 18887c478bd9Sstevel@tonic-gate * Used for both IPv4 and IPv6. However, IPv6 only uses FLUSH_MTU_TIME 18897c478bd9Sstevel@tonic-gate * since other stale information is cleaned up using NUD. 18907c478bd9Sstevel@tonic-gate */ 18917c478bd9Sstevel@tonic-gate void 18927c478bd9Sstevel@tonic-gate ire_expire(ire_t *ire, char *arg) 18937c478bd9Sstevel@tonic-gate { 1894f4b3ec61Sdh155122 ire_expire_arg_t *ieap = (ire_expire_arg_t *)(uintptr_t)arg; 18957c478bd9Sstevel@tonic-gate ill_t *stq_ill; 1896f4b3ec61Sdh155122 int flush_flags = ieap->iea_flush_flag; 1897f4b3ec61Sdh155122 ip_stack_t *ipst = ieap->iea_ipst; 18987c478bd9Sstevel@tonic-gate 18997c478bd9Sstevel@tonic-gate if ((flush_flags & FLUSH_REDIRECT_TIME) && 19006bdb8e66Sdd193516 (ire->ire_flags & RTF_DYNAMIC)) { 19017c478bd9Sstevel@tonic-gate /* Make sure we delete the corresponding IRE_CACHE */ 19027c478bd9Sstevel@tonic-gate ip1dbg(("ire_expire: all redirects\n")); 1903f4b3ec61Sdh155122 ip_rts_rtmsg(RTM_DELETE, ire, 0, ipst); 19047c478bd9Sstevel@tonic-gate ire_delete(ire); 1905f4b3ec61Sdh155122 atomic_dec_32(&ipst->ips_ip_redirect_cnt); 19067c478bd9Sstevel@tonic-gate return; 19077c478bd9Sstevel@tonic-gate } 19087c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) 19097c478bd9Sstevel@tonic-gate return; 19107c478bd9Sstevel@tonic-gate 19117c478bd9Sstevel@tonic-gate if (flush_flags & FLUSH_ARP_TIME) { 19127c478bd9Sstevel@tonic-gate /* 19137c478bd9Sstevel@tonic-gate * Remove all IRE_CACHE. 19147c478bd9Sstevel@tonic-gate * Verify that create time is more than 19157c478bd9Sstevel@tonic-gate * ip_ire_arp_interval milliseconds ago. 19167c478bd9Sstevel@tonic-gate */ 1917f4b3ec61Sdh155122 if (NCE_EXPIRED(ire->ire_nce, ipst)) { 19187c478bd9Sstevel@tonic-gate ire_delete(ire); 19197c478bd9Sstevel@tonic-gate return; 19207c478bd9Sstevel@tonic-gate } 19217c478bd9Sstevel@tonic-gate } 19227c478bd9Sstevel@tonic-gate 1923f4b3ec61Sdh155122 if (ipst->ips_ip_path_mtu_discovery && (flush_flags & FLUSH_MTU_TIME) && 19247c478bd9Sstevel@tonic-gate (ire->ire_ipif != NULL)) { 19257c478bd9Sstevel@tonic-gate /* Increase pmtu if it is less than the interface mtu */ 19267c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 19277c478bd9Sstevel@tonic-gate /* 19287c478bd9Sstevel@tonic-gate * If the ipif is a vni (whose mtu is 0, since it's virtual) 19297c478bd9Sstevel@tonic-gate * get the mtu from the sending interfaces' ipif 19307c478bd9Sstevel@tonic-gate */ 19317c478bd9Sstevel@tonic-gate if (IS_VNI(ire->ire_ipif->ipif_ill)) { 19327c478bd9Sstevel@tonic-gate stq_ill = ire->ire_stq->q_ptr; 19337c478bd9Sstevel@tonic-gate ire->ire_max_frag = MIN(stq_ill->ill_ipif->ipif_mtu, 19347c478bd9Sstevel@tonic-gate IP_MAXPACKET); 19357c478bd9Sstevel@tonic-gate } else { 19367c478bd9Sstevel@tonic-gate ire->ire_max_frag = MIN(ire->ire_ipif->ipif_mtu, 19377c478bd9Sstevel@tonic-gate IP_MAXPACKET); 19387c478bd9Sstevel@tonic-gate } 19397c478bd9Sstevel@tonic-gate ire->ire_frag_flag |= IPH_DF; 19407c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 19417c478bd9Sstevel@tonic-gate } 19427c478bd9Sstevel@tonic-gate } 19437c478bd9Sstevel@tonic-gate 19447c478bd9Sstevel@tonic-gate /* 19457c478bd9Sstevel@tonic-gate * Return any local address. We use this to target ourselves 19467c478bd9Sstevel@tonic-gate * when the src address was specified as 'default'. 19477c478bd9Sstevel@tonic-gate * Preference for IRE_LOCAL entries. 19487c478bd9Sstevel@tonic-gate */ 19497c478bd9Sstevel@tonic-gate ire_t * 1950f4b3ec61Sdh155122 ire_lookup_local(zoneid_t zoneid, ip_stack_t *ipst) 19517c478bd9Sstevel@tonic-gate { 19527c478bd9Sstevel@tonic-gate ire_t *ire; 19537c478bd9Sstevel@tonic-gate irb_t *irb; 19547c478bd9Sstevel@tonic-gate ire_t *maybe = NULL; 19557c478bd9Sstevel@tonic-gate int i; 19567c478bd9Sstevel@tonic-gate 1957f4b3ec61Sdh155122 for (i = 0; i < ipst->ips_ip_cache_table_size; i++) { 1958f4b3ec61Sdh155122 irb = &ipst->ips_ip_cache_table[i]; 19597c478bd9Sstevel@tonic-gate if (irb->irb_ire == NULL) 19607c478bd9Sstevel@tonic-gate continue; 19617c478bd9Sstevel@tonic-gate rw_enter(&irb->irb_lock, RW_READER); 19627c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 19637c478bd9Sstevel@tonic-gate if ((ire->ire_marks & IRE_MARK_CONDEMNED) || 196445916cd2Sjpk (ire->ire_zoneid != zoneid && 196545916cd2Sjpk ire->ire_zoneid != ALL_ZONES)) 19667c478bd9Sstevel@tonic-gate continue; 19677c478bd9Sstevel@tonic-gate switch (ire->ire_type) { 19687c478bd9Sstevel@tonic-gate case IRE_LOOPBACK: 19697c478bd9Sstevel@tonic-gate if (maybe == NULL) { 19707c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 19717c478bd9Sstevel@tonic-gate maybe = ire; 19727c478bd9Sstevel@tonic-gate } 19737c478bd9Sstevel@tonic-gate break; 19747c478bd9Sstevel@tonic-gate case IRE_LOCAL: 19757c478bd9Sstevel@tonic-gate if (maybe != NULL) { 19767c478bd9Sstevel@tonic-gate ire_refrele(maybe); 19777c478bd9Sstevel@tonic-gate } 19787c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 19797c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 19807c478bd9Sstevel@tonic-gate return (ire); 19817c478bd9Sstevel@tonic-gate } 19827c478bd9Sstevel@tonic-gate } 19837c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 19847c478bd9Sstevel@tonic-gate } 19857c478bd9Sstevel@tonic-gate return (maybe); 19867c478bd9Sstevel@tonic-gate } 19877c478bd9Sstevel@tonic-gate 19887c478bd9Sstevel@tonic-gate /* 19897c478bd9Sstevel@tonic-gate * If the specified IRE is associated with a particular ILL, return 19907c478bd9Sstevel@tonic-gate * that ILL pointer (May be called as writer.). 19917c478bd9Sstevel@tonic-gate * 19927c478bd9Sstevel@tonic-gate * NOTE : This is not a generic function that can be used always. 19937c478bd9Sstevel@tonic-gate * This function always returns the ill of the outgoing packets 19947c478bd9Sstevel@tonic-gate * if this ire is used. 19957c478bd9Sstevel@tonic-gate */ 19967c478bd9Sstevel@tonic-gate ill_t * 199745916cd2Sjpk ire_to_ill(const ire_t *ire) 19987c478bd9Sstevel@tonic-gate { 19997c478bd9Sstevel@tonic-gate ill_t *ill = NULL; 20007c478bd9Sstevel@tonic-gate 20017c478bd9Sstevel@tonic-gate /* 20027c478bd9Sstevel@tonic-gate * 1) For an IRE_CACHE, ire_ipif is the one where it obtained 20037c478bd9Sstevel@tonic-gate * the source address from. ire_stq is the one where the 20047c478bd9Sstevel@tonic-gate * packets will be sent out on. We return that here. 20057c478bd9Sstevel@tonic-gate * 20067c478bd9Sstevel@tonic-gate * 2) IRE_BROADCAST normally has a loopback and a non-loopback 20077c478bd9Sstevel@tonic-gate * copy and they always exist next to each other with loopback 20087c478bd9Sstevel@tonic-gate * copy being the first one. If we are called on the non-loopback 20097c478bd9Sstevel@tonic-gate * copy, return the one pointed by ire_stq. If it was called on 20107c478bd9Sstevel@tonic-gate * a loopback copy, we still return the one pointed by the next 20117c478bd9Sstevel@tonic-gate * ire's ire_stq pointer i.e the one pointed by the non-loopback 20127c478bd9Sstevel@tonic-gate * copy. We don't want use ire_ipif as it might represent the 20137c478bd9Sstevel@tonic-gate * source address (if we borrow source addresses for 20147c478bd9Sstevel@tonic-gate * IRE_BROADCASTS in the future). 20157c478bd9Sstevel@tonic-gate * However if an interface is currently coming up, the above 20167c478bd9Sstevel@tonic-gate * condition may not hold during that period since the ires 20177c478bd9Sstevel@tonic-gate * are added one at a time. Thus one of the pair could have been 20187c478bd9Sstevel@tonic-gate * added and the other not yet added. 20192bc4236aSnordmark * 3) For many other IREs (e.g., IRE_LOCAL), ire_rfq indicates the ill. 20202bc4236aSnordmark * 4) For all others return the ones pointed by ire_ipif->ipif_ill. 20212bc4236aSnordmark * That handles IRE_LOOPBACK. 20227c478bd9Sstevel@tonic-gate */ 20237c478bd9Sstevel@tonic-gate 20247c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE) { 20257c478bd9Sstevel@tonic-gate ill = (ill_t *)ire->ire_stq->q_ptr; 20267c478bd9Sstevel@tonic-gate } else if (ire->ire_type == IRE_BROADCAST) { 20277c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) { 20287c478bd9Sstevel@tonic-gate ill = (ill_t *)ire->ire_stq->q_ptr; 20297c478bd9Sstevel@tonic-gate } else { 20307c478bd9Sstevel@tonic-gate ire_t *ire_next; 20317c478bd9Sstevel@tonic-gate 20327c478bd9Sstevel@tonic-gate ire_next = ire->ire_next; 20337c478bd9Sstevel@tonic-gate if (ire_next != NULL && 20347c478bd9Sstevel@tonic-gate ire_next->ire_type == IRE_BROADCAST && 20357c478bd9Sstevel@tonic-gate ire_next->ire_addr == ire->ire_addr && 20367c478bd9Sstevel@tonic-gate ire_next->ire_ipif == ire->ire_ipif) { 20377c478bd9Sstevel@tonic-gate ill = (ill_t *)ire_next->ire_stq->q_ptr; 20387c478bd9Sstevel@tonic-gate } 20397c478bd9Sstevel@tonic-gate } 20402bc4236aSnordmark } else if (ire->ire_rfq != NULL) { 20412bc4236aSnordmark ill = ire->ire_rfq->q_ptr; 20427c478bd9Sstevel@tonic-gate } else if (ire->ire_ipif != NULL) { 20437c478bd9Sstevel@tonic-gate ill = ire->ire_ipif->ipif_ill; 20447c478bd9Sstevel@tonic-gate } 20457c478bd9Sstevel@tonic-gate return (ill); 20467c478bd9Sstevel@tonic-gate } 20477c478bd9Sstevel@tonic-gate 20487c478bd9Sstevel@tonic-gate /* Arrange to call the specified function for every IRE in the world. */ 20497c478bd9Sstevel@tonic-gate void 2050f4b3ec61Sdh155122 ire_walk(pfv_t func, void *arg, ip_stack_t *ipst) 20517c478bd9Sstevel@tonic-gate { 2052f4b3ec61Sdh155122 ire_walk_ipvers(func, arg, 0, ALL_ZONES, ipst); 20537c478bd9Sstevel@tonic-gate } 20547c478bd9Sstevel@tonic-gate 20557c478bd9Sstevel@tonic-gate void 2056f4b3ec61Sdh155122 ire_walk_v4(pfv_t func, void *arg, zoneid_t zoneid, ip_stack_t *ipst) 20577c478bd9Sstevel@tonic-gate { 2058f4b3ec61Sdh155122 ire_walk_ipvers(func, arg, IPV4_VERSION, zoneid, ipst); 20597c478bd9Sstevel@tonic-gate } 20607c478bd9Sstevel@tonic-gate 20617c478bd9Sstevel@tonic-gate void 2062f4b3ec61Sdh155122 ire_walk_v6(pfv_t func, void *arg, zoneid_t zoneid, ip_stack_t *ipst) 20637c478bd9Sstevel@tonic-gate { 2064f4b3ec61Sdh155122 ire_walk_ipvers(func, arg, IPV6_VERSION, zoneid, ipst); 20657c478bd9Sstevel@tonic-gate } 20667c478bd9Sstevel@tonic-gate 20677c478bd9Sstevel@tonic-gate /* 20687c478bd9Sstevel@tonic-gate * Walk a particular version. version == 0 means both v4 and v6. 20697c478bd9Sstevel@tonic-gate */ 20707c478bd9Sstevel@tonic-gate static void 2071f4b3ec61Sdh155122 ire_walk_ipvers(pfv_t func, void *arg, uchar_t vers, zoneid_t zoneid, 2072f4b3ec61Sdh155122 ip_stack_t *ipst) 20737c478bd9Sstevel@tonic-gate { 20747c478bd9Sstevel@tonic-gate if (vers != IPV6_VERSION) { 2075c793af95Ssangeeta /* 2076c793af95Ssangeeta * ip_forwarding_table variable doesn't matter for IPv4 since 2077f4b3ec61Sdh155122 * ire_walk_ill_tables uses ips_ip_ftable for IPv4. 2078c793af95Ssangeeta */ 20797c478bd9Sstevel@tonic-gate ire_walk_ill_tables(0, 0, func, arg, IP_MASK_TABLE_SIZE, 2080c793af95Ssangeeta 0, NULL, 2081f4b3ec61Sdh155122 ipst->ips_ip_cache_table_size, ipst->ips_ip_cache_table, 2082f4b3ec61Sdh155122 NULL, zoneid, ipst); 20837c478bd9Sstevel@tonic-gate } 20847c478bd9Sstevel@tonic-gate if (vers != IPV4_VERSION) { 20857c478bd9Sstevel@tonic-gate ire_walk_ill_tables(0, 0, func, arg, IP6_MASK_TABLE_SIZE, 2086f4b3ec61Sdh155122 ipst->ips_ip6_ftable_hash_size, 2087f4b3ec61Sdh155122 ipst->ips_ip_forwarding_table_v6, 2088f4b3ec61Sdh155122 ipst->ips_ip6_cache_table_size, 2089f4b3ec61Sdh155122 ipst->ips_ip_cache_table_v6, NULL, zoneid, ipst); 20907c478bd9Sstevel@tonic-gate } 20917c478bd9Sstevel@tonic-gate } 20927c478bd9Sstevel@tonic-gate 20937c478bd9Sstevel@tonic-gate /* 20947c478bd9Sstevel@tonic-gate * Arrange to call the specified 20957c478bd9Sstevel@tonic-gate * function for every IRE that matches the ill. 20967c478bd9Sstevel@tonic-gate */ 20977c478bd9Sstevel@tonic-gate void 209845916cd2Sjpk ire_walk_ill(uint_t match_flags, uint_t ire_type, pfv_t func, void *arg, 20997c478bd9Sstevel@tonic-gate ill_t *ill) 21007c478bd9Sstevel@tonic-gate { 21017c478bd9Sstevel@tonic-gate ire_walk_ill_ipvers(match_flags, ire_type, func, arg, 0, ill); 21027c478bd9Sstevel@tonic-gate } 21037c478bd9Sstevel@tonic-gate 21047c478bd9Sstevel@tonic-gate void 210545916cd2Sjpk ire_walk_ill_v4(uint_t match_flags, uint_t ire_type, pfv_t func, void *arg, 21067c478bd9Sstevel@tonic-gate ill_t *ill) 21077c478bd9Sstevel@tonic-gate { 21087c478bd9Sstevel@tonic-gate ire_walk_ill_ipvers(match_flags, ire_type, func, arg, IPV4_VERSION, 21097c478bd9Sstevel@tonic-gate ill); 21107c478bd9Sstevel@tonic-gate } 21117c478bd9Sstevel@tonic-gate 21127c478bd9Sstevel@tonic-gate void 211345916cd2Sjpk ire_walk_ill_v6(uint_t match_flags, uint_t ire_type, pfv_t func, void *arg, 21147c478bd9Sstevel@tonic-gate ill_t *ill) 21157c478bd9Sstevel@tonic-gate { 21167c478bd9Sstevel@tonic-gate ire_walk_ill_ipvers(match_flags, ire_type, func, arg, IPV6_VERSION, 21177c478bd9Sstevel@tonic-gate ill); 21187c478bd9Sstevel@tonic-gate } 21197c478bd9Sstevel@tonic-gate 21207c478bd9Sstevel@tonic-gate /* 21217c478bd9Sstevel@tonic-gate * Walk a particular ill and version. version == 0 means both v4 and v6. 21227c478bd9Sstevel@tonic-gate */ 21237c478bd9Sstevel@tonic-gate static void 21247c478bd9Sstevel@tonic-gate ire_walk_ill_ipvers(uint_t match_flags, uint_t ire_type, pfv_t func, 212545916cd2Sjpk void *arg, uchar_t vers, ill_t *ill) 21267c478bd9Sstevel@tonic-gate { 2127f4b3ec61Sdh155122 ip_stack_t *ipst = ill->ill_ipst; 2128f4b3ec61Sdh155122 21297c478bd9Sstevel@tonic-gate if (vers != IPV6_VERSION) { 21307c478bd9Sstevel@tonic-gate ire_walk_ill_tables(match_flags, ire_type, func, arg, 2131c793af95Ssangeeta IP_MASK_TABLE_SIZE, 0, 2132f4b3ec61Sdh155122 NULL, ipst->ips_ip_cache_table_size, 2133f4b3ec61Sdh155122 ipst->ips_ip_cache_table, ill, ALL_ZONES, ipst); 21347c478bd9Sstevel@tonic-gate } 21357c478bd9Sstevel@tonic-gate if (vers != IPV4_VERSION) { 21367c478bd9Sstevel@tonic-gate ire_walk_ill_tables(match_flags, ire_type, func, arg, 2137f4b3ec61Sdh155122 IP6_MASK_TABLE_SIZE, ipst->ips_ip6_ftable_hash_size, 2138f4b3ec61Sdh155122 ipst->ips_ip_forwarding_table_v6, 2139f4b3ec61Sdh155122 ipst->ips_ip6_cache_table_size, 2140f4b3ec61Sdh155122 ipst->ips_ip_cache_table_v6, ill, ALL_ZONES, ipst); 21417c478bd9Sstevel@tonic-gate } 21427c478bd9Sstevel@tonic-gate } 21437c478bd9Sstevel@tonic-gate 2144c793af95Ssangeeta boolean_t 21457c478bd9Sstevel@tonic-gate ire_walk_ill_match(uint_t match_flags, uint_t ire_type, ire_t *ire, 2146f4b3ec61Sdh155122 ill_t *ill, zoneid_t zoneid, ip_stack_t *ipst) 21477c478bd9Sstevel@tonic-gate { 21487c478bd9Sstevel@tonic-gate ill_t *ire_stq_ill = NULL; 21497c478bd9Sstevel@tonic-gate ill_t *ire_ipif_ill = NULL; 21507c478bd9Sstevel@tonic-gate ill_group_t *ire_ill_group = NULL; 21517c478bd9Sstevel@tonic-gate 21527c478bd9Sstevel@tonic-gate ASSERT(match_flags != 0 || zoneid != ALL_ZONES); 21537c478bd9Sstevel@tonic-gate /* 215498e93c29Smeem * MATCH_IRE_ILL/MATCH_IRE_ILL_GROUP : We match both on ill 21557c478bd9Sstevel@tonic-gate * pointed by ire_stq and ire_ipif. Only in the case of 21567c478bd9Sstevel@tonic-gate * IRE_CACHEs can ire_stq and ire_ipif be pointing to 21577c478bd9Sstevel@tonic-gate * different ills. But we want to keep this function generic 21587c478bd9Sstevel@tonic-gate * enough for future use. So, we always try to match on both. 21597c478bd9Sstevel@tonic-gate * The only caller of this function ire_walk_ill_tables, will 21607c478bd9Sstevel@tonic-gate * call "func" after we return from this function. We expect 21617c478bd9Sstevel@tonic-gate * "func" to do the right filtering of ires in this case. 21627c478bd9Sstevel@tonic-gate * 21637c478bd9Sstevel@tonic-gate * NOTE : In the case of MATCH_IRE_ILL_GROUP, groups 21647c478bd9Sstevel@tonic-gate * pointed by ire_stq and ire_ipif should always be the same. 21657c478bd9Sstevel@tonic-gate * So, we just match on only one of them. 21667c478bd9Sstevel@tonic-gate */ 21677c478bd9Sstevel@tonic-gate if (match_flags & (MATCH_IRE_ILL|MATCH_IRE_ILL_GROUP)) { 21687c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) 21697c478bd9Sstevel@tonic-gate ire_stq_ill = (ill_t *)ire->ire_stq->q_ptr; 21707c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) 21717c478bd9Sstevel@tonic-gate ire_ipif_ill = ire->ire_ipif->ipif_ill; 21727c478bd9Sstevel@tonic-gate if (ire_stq_ill != NULL) 21737c478bd9Sstevel@tonic-gate ire_ill_group = ire_stq_ill->ill_group; 21747c478bd9Sstevel@tonic-gate if ((ire_ill_group == NULL) && (ire_ipif_ill != NULL)) 21757c478bd9Sstevel@tonic-gate ire_ill_group = ire_ipif_ill->ill_group; 21767c478bd9Sstevel@tonic-gate } 21777c478bd9Sstevel@tonic-gate 21787c478bd9Sstevel@tonic-gate if (zoneid != ALL_ZONES) { 21797c478bd9Sstevel@tonic-gate /* 21807c478bd9Sstevel@tonic-gate * We're walking the IREs for a specific zone. The only relevant 21817c478bd9Sstevel@tonic-gate * IREs are: 21827c478bd9Sstevel@tonic-gate * - all IREs with a matching ire_zoneid 21837c478bd9Sstevel@tonic-gate * - all IRE_OFFSUBNETs as they're shared across all zones 21847c478bd9Sstevel@tonic-gate * - IRE_INTERFACE IREs for interfaces with a usable source addr 21857c478bd9Sstevel@tonic-gate * with a matching zone 21867c478bd9Sstevel@tonic-gate * - IRE_DEFAULTs with a gateway reachable from the zone 21877c478bd9Sstevel@tonic-gate * We should really match on IRE_OFFSUBNETs and IRE_DEFAULTs 21887c478bd9Sstevel@tonic-gate * using the same rule; but the above rules are consistent with 21897c478bd9Sstevel@tonic-gate * the behavior of ire_ftable_lookup[_v6]() so that all the 21907c478bd9Sstevel@tonic-gate * routes that can be matched during lookup are also matched 21917c478bd9Sstevel@tonic-gate * here. 21927c478bd9Sstevel@tonic-gate */ 219345916cd2Sjpk if (zoneid != ire->ire_zoneid && ire->ire_zoneid != ALL_ZONES) { 21947c478bd9Sstevel@tonic-gate /* 21957c478bd9Sstevel@tonic-gate * Note, IRE_INTERFACE can have the stq as NULL. For 21967c478bd9Sstevel@tonic-gate * example, if the default multicast route is tied to 21977c478bd9Sstevel@tonic-gate * the loopback address. 21987c478bd9Sstevel@tonic-gate */ 21997c478bd9Sstevel@tonic-gate if ((ire->ire_type & IRE_INTERFACE) && 22007c478bd9Sstevel@tonic-gate (ire->ire_stq != NULL)) { 22017c478bd9Sstevel@tonic-gate ire_stq_ill = (ill_t *)ire->ire_stq->q_ptr; 22027c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 22037c478bd9Sstevel@tonic-gate if (!ipif_usesrc_avail(ire_stq_ill, 22047c478bd9Sstevel@tonic-gate zoneid)) 22057c478bd9Sstevel@tonic-gate /* No usable src addr in zone */ 22067c478bd9Sstevel@tonic-gate return (B_FALSE); 22077c478bd9Sstevel@tonic-gate } else if (ire_stq_ill->ill_usesrc_ifindex 22087c478bd9Sstevel@tonic-gate != 0) { 22097c478bd9Sstevel@tonic-gate /* 22107c478bd9Sstevel@tonic-gate * For IPv6 use ipif_select_source_v6() 22117c478bd9Sstevel@tonic-gate * so the right scope selection is done 22127c478bd9Sstevel@tonic-gate */ 22137c478bd9Sstevel@tonic-gate ipif_t *src_ipif; 22147c478bd9Sstevel@tonic-gate src_ipif = 22157c478bd9Sstevel@tonic-gate ipif_select_source_v6(ire_stq_ill, 2216309fa174Srk129064 &ire->ire_addr_v6, RESTRICT_TO_NONE, 22177c478bd9Sstevel@tonic-gate IPV6_PREFER_SRC_DEFAULT, 22187c478bd9Sstevel@tonic-gate zoneid); 22197c478bd9Sstevel@tonic-gate if (src_ipif != NULL) { 22207c478bd9Sstevel@tonic-gate ipif_refrele(src_ipif); 22217c478bd9Sstevel@tonic-gate } else { 22227c478bd9Sstevel@tonic-gate return (B_FALSE); 22237c478bd9Sstevel@tonic-gate } 22247c478bd9Sstevel@tonic-gate } else { 22257c478bd9Sstevel@tonic-gate return (B_FALSE); 22267c478bd9Sstevel@tonic-gate } 22277c478bd9Sstevel@tonic-gate 22287c478bd9Sstevel@tonic-gate } else if (!(ire->ire_type & IRE_OFFSUBNET)) { 22297c478bd9Sstevel@tonic-gate return (B_FALSE); 22307c478bd9Sstevel@tonic-gate } 22317c478bd9Sstevel@tonic-gate } 22327c478bd9Sstevel@tonic-gate 22337c478bd9Sstevel@tonic-gate /* 22347c478bd9Sstevel@tonic-gate * Match all default routes from the global zone, irrespective 22355597b60aSnordmark * of reachability. For a non-global zone only match those 22365597b60aSnordmark * where ire_gateway_addr has a IRE_INTERFACE for the zoneid. 22377c478bd9Sstevel@tonic-gate */ 22387c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT && zoneid != GLOBAL_ZONEID) { 22397c478bd9Sstevel@tonic-gate int ire_match_flags = 0; 22407c478bd9Sstevel@tonic-gate in6_addr_t gw_addr_v6; 22417c478bd9Sstevel@tonic-gate ire_t *rire; 22427c478bd9Sstevel@tonic-gate 22435597b60aSnordmark ire_match_flags |= MATCH_IRE_TYPE; 22447c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) { 22457c478bd9Sstevel@tonic-gate ire_match_flags |= MATCH_IRE_ILL_GROUP; 22467c478bd9Sstevel@tonic-gate } 22477c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 22487c478bd9Sstevel@tonic-gate rire = ire_route_lookup(ire->ire_gateway_addr, 22495597b60aSnordmark 0, 0, IRE_INTERFACE, ire->ire_ipif, NULL, 2250f4b3ec61Sdh155122 zoneid, NULL, ire_match_flags, ipst); 22517c478bd9Sstevel@tonic-gate } else { 22527c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV6_VERSION); 22537c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 22547c478bd9Sstevel@tonic-gate gw_addr_v6 = ire->ire_gateway_addr_v6; 22557c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 22567c478bd9Sstevel@tonic-gate rire = ire_route_lookup_v6(&gw_addr_v6, 22575597b60aSnordmark NULL, NULL, IRE_INTERFACE, ire->ire_ipif, 2258f4b3ec61Sdh155122 NULL, zoneid, NULL, ire_match_flags, ipst); 22597c478bd9Sstevel@tonic-gate } 22607c478bd9Sstevel@tonic-gate if (rire == NULL) { 22617c478bd9Sstevel@tonic-gate return (B_FALSE); 22627c478bd9Sstevel@tonic-gate } 22637c478bd9Sstevel@tonic-gate ire_refrele(rire); 22647c478bd9Sstevel@tonic-gate } 22657c478bd9Sstevel@tonic-gate } 22667c478bd9Sstevel@tonic-gate 22677c478bd9Sstevel@tonic-gate if (((!(match_flags & MATCH_IRE_TYPE)) || 22687c478bd9Sstevel@tonic-gate (ire->ire_type & ire_type)) && 22697c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_ILL)) || 22707c478bd9Sstevel@tonic-gate (ire_stq_ill == ill || ire_ipif_ill == ill)) && 22717c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_ILL_GROUP)) || 22727c478bd9Sstevel@tonic-gate (ire_stq_ill == ill) || (ire_ipif_ill == ill) || 22737c478bd9Sstevel@tonic-gate (ire_ill_group != NULL && 22747c478bd9Sstevel@tonic-gate ire_ill_group == ill->ill_group))) { 22757c478bd9Sstevel@tonic-gate return (B_TRUE); 22767c478bd9Sstevel@tonic-gate } 22777c478bd9Sstevel@tonic-gate return (B_FALSE); 22787c478bd9Sstevel@tonic-gate } 22797c478bd9Sstevel@tonic-gate 2280c793af95Ssangeeta int 2281c793af95Ssangeeta rtfunc(struct radix_node *rn, void *arg) 2282c793af95Ssangeeta { 2283c793af95Ssangeeta struct rtfuncarg *rtf = arg; 2284c793af95Ssangeeta struct rt_entry *rt; 2285c793af95Ssangeeta irb_t *irb; 2286c793af95Ssangeeta ire_t *ire; 2287c793af95Ssangeeta boolean_t ret; 2288c793af95Ssangeeta 2289c793af95Ssangeeta rt = (struct rt_entry *)rn; 2290c793af95Ssangeeta ASSERT(rt != NULL); 2291c793af95Ssangeeta irb = &rt->rt_irb; 2292c793af95Ssangeeta for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 2293c793af95Ssangeeta if ((rtf->rt_match_flags != 0) || 2294c793af95Ssangeeta (rtf->rt_zoneid != ALL_ZONES)) { 2295c793af95Ssangeeta ret = ire_walk_ill_match(rtf->rt_match_flags, 2296c793af95Ssangeeta rtf->rt_ire_type, ire, 2297f4b3ec61Sdh155122 rtf->rt_ill, rtf->rt_zoneid, rtf->rt_ipst); 2298c793af95Ssangeeta } else 2299c793af95Ssangeeta ret = B_TRUE; 2300c793af95Ssangeeta if (ret) 2301c793af95Ssangeeta (*rtf->rt_func)(ire, rtf->rt_arg); 2302c793af95Ssangeeta } 2303c793af95Ssangeeta return (0); 2304c793af95Ssangeeta } 2305c793af95Ssangeeta 23067c478bd9Sstevel@tonic-gate /* 23077c478bd9Sstevel@tonic-gate * Walk the ftable and the ctable entries that match the ill. 23087c478bd9Sstevel@tonic-gate */ 2309c793af95Ssangeeta void 23107c478bd9Sstevel@tonic-gate ire_walk_ill_tables(uint_t match_flags, uint_t ire_type, pfv_t func, 231145916cd2Sjpk void *arg, size_t ftbl_sz, size_t htbl_sz, irb_t **ipftbl, 2312f4b3ec61Sdh155122 size_t ctbl_sz, irb_t *ipctbl, ill_t *ill, zoneid_t zoneid, 2313f4b3ec61Sdh155122 ip_stack_t *ipst) 23147c478bd9Sstevel@tonic-gate { 23157c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 23167c478bd9Sstevel@tonic-gate irb_t *irb; 23177c478bd9Sstevel@tonic-gate ire_t *ire; 23187c478bd9Sstevel@tonic-gate int i, j; 23197c478bd9Sstevel@tonic-gate boolean_t ret; 2320c793af95Ssangeeta struct rtfuncarg rtfarg; 23217c478bd9Sstevel@tonic-gate 232298e93c29Smeem ASSERT((!(match_flags & (MATCH_IRE_ILL | 23237c478bd9Sstevel@tonic-gate MATCH_IRE_ILL_GROUP))) || (ill != NULL)); 23247c478bd9Sstevel@tonic-gate ASSERT(!(match_flags & MATCH_IRE_TYPE) || (ire_type != 0)); 23257c478bd9Sstevel@tonic-gate /* 23267c478bd9Sstevel@tonic-gate * Optimize by not looking at the forwarding table if there 23277c478bd9Sstevel@tonic-gate * is a MATCH_IRE_TYPE specified with no IRE_FORWARDTABLE 23287c478bd9Sstevel@tonic-gate * specified in ire_type. 23297c478bd9Sstevel@tonic-gate */ 23307c478bd9Sstevel@tonic-gate if (!(match_flags & MATCH_IRE_TYPE) || 23317c478bd9Sstevel@tonic-gate ((ire_type & IRE_FORWARDTABLE) != 0)) { 2332c793af95Ssangeeta /* knobs such that routine is called only for v6 case */ 2333f4b3ec61Sdh155122 if (ipftbl == ipst->ips_ip_forwarding_table_v6) { 23347c478bd9Sstevel@tonic-gate for (i = (ftbl_sz - 1); i >= 0; i--) { 23357c478bd9Sstevel@tonic-gate if ((irb_ptr = ipftbl[i]) == NULL) 23367c478bd9Sstevel@tonic-gate continue; 23377c478bd9Sstevel@tonic-gate for (j = 0; j < htbl_sz; j++) { 23387c478bd9Sstevel@tonic-gate irb = &irb_ptr[j]; 23397c478bd9Sstevel@tonic-gate if (irb->irb_ire == NULL) 23407c478bd9Sstevel@tonic-gate continue; 2341c793af95Ssangeeta 23427c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 23437c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; 23447c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 23457c478bd9Sstevel@tonic-gate if (match_flags == 0 && 23467c478bd9Sstevel@tonic-gate zoneid == ALL_ZONES) { 23477c478bd9Sstevel@tonic-gate ret = B_TRUE; 23487c478bd9Sstevel@tonic-gate } else { 2349c793af95Ssangeeta ret = 2350c793af95Ssangeeta ire_walk_ill_match( 2351c793af95Ssangeeta match_flags, 2352c793af95Ssangeeta ire_type, ire, ill, 2353f4b3ec61Sdh155122 zoneid, ipst); 23547c478bd9Sstevel@tonic-gate } 23557c478bd9Sstevel@tonic-gate if (ret) 23567c478bd9Sstevel@tonic-gate (*func)(ire, arg); 23577c478bd9Sstevel@tonic-gate } 23587c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 23597c478bd9Sstevel@tonic-gate } 23607c478bd9Sstevel@tonic-gate } 2361c793af95Ssangeeta } else { 2362c793af95Ssangeeta (void) memset(&rtfarg, 0, sizeof (rtfarg)); 2363c793af95Ssangeeta rtfarg.rt_func = func; 2364c793af95Ssangeeta rtfarg.rt_arg = arg; 2365c793af95Ssangeeta if (match_flags != 0) { 2366c793af95Ssangeeta rtfarg.rt_match_flags = match_flags; 2367c793af95Ssangeeta } 2368c793af95Ssangeeta rtfarg.rt_ire_type = ire_type; 2369c793af95Ssangeeta rtfarg.rt_ill = ill; 2370c793af95Ssangeeta rtfarg.rt_zoneid = zoneid; 2371f4b3ec61Sdh155122 rtfarg.rt_ipst = ipst; /* No netstack_hold */ 2372f4b3ec61Sdh155122 (void) ipst->ips_ip_ftable->rnh_walktree_mt( 2373f4b3ec61Sdh155122 ipst->ips_ip_ftable, 2374f4b3ec61Sdh155122 rtfunc, &rtfarg, irb_refhold_rn, irb_refrele_rn); 2375c793af95Ssangeeta } 23767c478bd9Sstevel@tonic-gate } 23777c478bd9Sstevel@tonic-gate 23787c478bd9Sstevel@tonic-gate /* 23797c478bd9Sstevel@tonic-gate * Optimize by not looking at the cache table if there 23807c478bd9Sstevel@tonic-gate * is a MATCH_IRE_TYPE specified with no IRE_CACHETABLE 23817c478bd9Sstevel@tonic-gate * specified in ire_type. 23827c478bd9Sstevel@tonic-gate */ 23837c478bd9Sstevel@tonic-gate if (!(match_flags & MATCH_IRE_TYPE) || 23847c478bd9Sstevel@tonic-gate ((ire_type & IRE_CACHETABLE) != 0)) { 23857c478bd9Sstevel@tonic-gate for (i = 0; i < ctbl_sz; i++) { 23867c478bd9Sstevel@tonic-gate irb = &ipctbl[i]; 23877c478bd9Sstevel@tonic-gate if (irb->irb_ire == NULL) 23887c478bd9Sstevel@tonic-gate continue; 23897c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 23907c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; 23917c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 23927c478bd9Sstevel@tonic-gate if (match_flags == 0 && zoneid == ALL_ZONES) { 23937c478bd9Sstevel@tonic-gate ret = B_TRUE; 23947c478bd9Sstevel@tonic-gate } else { 23957c478bd9Sstevel@tonic-gate ret = ire_walk_ill_match( 23967c478bd9Sstevel@tonic-gate match_flags, ire_type, 2397f4b3ec61Sdh155122 ire, ill, zoneid, ipst); 23987c478bd9Sstevel@tonic-gate } 23997c478bd9Sstevel@tonic-gate if (ret) 24007c478bd9Sstevel@tonic-gate (*func)(ire, arg); 24017c478bd9Sstevel@tonic-gate } 24027c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 24037c478bd9Sstevel@tonic-gate } 24047c478bd9Sstevel@tonic-gate } 24057c478bd9Sstevel@tonic-gate } 24067c478bd9Sstevel@tonic-gate 24077c478bd9Sstevel@tonic-gate /* 24087c478bd9Sstevel@tonic-gate * This function takes a mask and returns 24097c478bd9Sstevel@tonic-gate * number of bits set in the mask. If no 24107c478bd9Sstevel@tonic-gate * bit is set it returns 0. 24117c478bd9Sstevel@tonic-gate * Assumes a contiguous mask. 24127c478bd9Sstevel@tonic-gate */ 24137c478bd9Sstevel@tonic-gate int 24147c478bd9Sstevel@tonic-gate ip_mask_to_plen(ipaddr_t mask) 24157c478bd9Sstevel@tonic-gate { 24167c478bd9Sstevel@tonic-gate return (mask == 0 ? 0 : IP_ABITS - (ffs(ntohl(mask)) -1)); 24177c478bd9Sstevel@tonic-gate } 24187c478bd9Sstevel@tonic-gate 24197c478bd9Sstevel@tonic-gate /* 24207c478bd9Sstevel@tonic-gate * Convert length for a mask to the mask. 24217c478bd9Sstevel@tonic-gate */ 24227c478bd9Sstevel@tonic-gate ipaddr_t 24237c478bd9Sstevel@tonic-gate ip_plen_to_mask(uint_t masklen) 24247c478bd9Sstevel@tonic-gate { 24257c478bd9Sstevel@tonic-gate return (htonl(IP_HOST_MASK << (IP_ABITS - masklen))); 24267c478bd9Sstevel@tonic-gate } 24277c478bd9Sstevel@tonic-gate 24287c478bd9Sstevel@tonic-gate void 24297c478bd9Sstevel@tonic-gate ire_atomic_end(irb_t *irb_ptr, ire_t *ire) 24307c478bd9Sstevel@tonic-gate { 24317c478bd9Sstevel@tonic-gate ill_t *ill_list[NUM_ILLS]; 2432f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 24337c478bd9Sstevel@tonic-gate 24347c478bd9Sstevel@tonic-gate ill_list[0] = ire->ire_stq != NULL ? ire->ire_stq->q_ptr : NULL; 24357c478bd9Sstevel@tonic-gate ill_list[1] = ire->ire_ipif != NULL ? ire->ire_ipif->ipif_ill : NULL; 24367c478bd9Sstevel@tonic-gate ill_unlock_ills(ill_list, NUM_ILLS); 24377c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 2438f4b3ec61Sdh155122 rw_exit(&ipst->ips_ill_g_usesrc_lock); 24397c478bd9Sstevel@tonic-gate } 24407c478bd9Sstevel@tonic-gate 24417c478bd9Sstevel@tonic-gate /* 24427c478bd9Sstevel@tonic-gate * ire_add_v[46] atomically make sure that the ipif or ill associated 24437c478bd9Sstevel@tonic-gate * with the new ire being added is stable and not IPIF_CHANGING or ILL_CHANGING 24447c478bd9Sstevel@tonic-gate * before adding the ire to the table. This ensures that we don't create 24457c478bd9Sstevel@tonic-gate * new IRE_CACHEs with stale values for parameters that are passed to 24467c478bd9Sstevel@tonic-gate * ire_create such as ire_max_frag. Note that ire_create() is passed a pointer 24477c478bd9Sstevel@tonic-gate * to the ipif_mtu, and not the value. The actual value is derived from the 24487c478bd9Sstevel@tonic-gate * parent ire or ipif under the bucket lock. 24497c478bd9Sstevel@tonic-gate */ 24507c478bd9Sstevel@tonic-gate int 24517c478bd9Sstevel@tonic-gate ire_atomic_start(irb_t *irb_ptr, ire_t *ire, queue_t *q, mblk_t *mp, 24527c478bd9Sstevel@tonic-gate ipsq_func_t func) 24537c478bd9Sstevel@tonic-gate { 24547c478bd9Sstevel@tonic-gate ill_t *stq_ill; 24557c478bd9Sstevel@tonic-gate ill_t *ipif_ill; 24567c478bd9Sstevel@tonic-gate ill_t *ill_list[NUM_ILLS]; 24577c478bd9Sstevel@tonic-gate int cnt = NUM_ILLS; 24587c478bd9Sstevel@tonic-gate int error = 0; 24597c478bd9Sstevel@tonic-gate ill_t *ill = NULL; 2460f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 24617c478bd9Sstevel@tonic-gate 24627c478bd9Sstevel@tonic-gate ill_list[0] = stq_ill = ire->ire_stq != 24637c478bd9Sstevel@tonic-gate NULL ? ire->ire_stq->q_ptr : NULL; 24647c478bd9Sstevel@tonic-gate ill_list[1] = ipif_ill = ire->ire_ipif != 24657c478bd9Sstevel@tonic-gate NULL ? ire->ire_ipif->ipif_ill : NULL; 24667c478bd9Sstevel@tonic-gate 24677c478bd9Sstevel@tonic-gate ASSERT((q != NULL && mp != NULL && func != NULL) || 24687c478bd9Sstevel@tonic-gate (q == NULL && mp == NULL && func == NULL)); 2469f4b3ec61Sdh155122 rw_enter(&ipst->ips_ill_g_usesrc_lock, RW_READER); 24707c478bd9Sstevel@tonic-gate GRAB_CONN_LOCK(q); 24717c478bd9Sstevel@tonic-gate rw_enter(&irb_ptr->irb_lock, RW_WRITER); 24727c478bd9Sstevel@tonic-gate ill_lock_ills(ill_list, cnt); 24737c478bd9Sstevel@tonic-gate 24747c478bd9Sstevel@tonic-gate /* 24757c478bd9Sstevel@tonic-gate * While the IRE is in the process of being added, a user may have 24767c478bd9Sstevel@tonic-gate * invoked the ifconfig usesrc option on the stq_ill to make it a 24777c478bd9Sstevel@tonic-gate * usesrc client ILL. Check for this possibility here, if it is true 24787c478bd9Sstevel@tonic-gate * then we fail adding the IRE_CACHE. Another check is to make sure 24797c478bd9Sstevel@tonic-gate * that an ipif_ill of an IRE_CACHE being added is not part of a usesrc 24807c478bd9Sstevel@tonic-gate * group. The ill_g_usesrc_lock is released in ire_atomic_end 24817c478bd9Sstevel@tonic-gate */ 24827c478bd9Sstevel@tonic-gate if ((ire->ire_type & IRE_CACHE) && 24837c478bd9Sstevel@tonic-gate (ire->ire_marks & IRE_MARK_USESRC_CHECK)) { 24847c478bd9Sstevel@tonic-gate if (stq_ill->ill_usesrc_ifindex != 0) { 24857c478bd9Sstevel@tonic-gate ASSERT(stq_ill->ill_usesrc_grp_next != NULL); 24867c478bd9Sstevel@tonic-gate if ((ipif_ill->ill_phyint->phyint_ifindex != 24877c478bd9Sstevel@tonic-gate stq_ill->ill_usesrc_ifindex) || 24887c478bd9Sstevel@tonic-gate (ipif_ill->ill_usesrc_grp_next == NULL) || 24897c478bd9Sstevel@tonic-gate (ipif_ill->ill_usesrc_ifindex != 0)) { 24907c478bd9Sstevel@tonic-gate error = EINVAL; 24917c478bd9Sstevel@tonic-gate goto done; 24927c478bd9Sstevel@tonic-gate } 24937c478bd9Sstevel@tonic-gate } else if (ipif_ill->ill_usesrc_grp_next != NULL) { 24947c478bd9Sstevel@tonic-gate error = EINVAL; 24957c478bd9Sstevel@tonic-gate goto done; 24967c478bd9Sstevel@tonic-gate } 24977c478bd9Sstevel@tonic-gate } 24987c478bd9Sstevel@tonic-gate 24997c478bd9Sstevel@tonic-gate /* 25007c478bd9Sstevel@tonic-gate * IPMP flag settings happen without taking the exclusive route 25017c478bd9Sstevel@tonic-gate * in ip_sioctl_flags. So we need to make an atomic check here 25027c478bd9Sstevel@tonic-gate * for FAILED/OFFLINE/INACTIVE flags or if it has hit the 25037c478bd9Sstevel@tonic-gate * FAILBACK=no case. 25047c478bd9Sstevel@tonic-gate */ 25057c478bd9Sstevel@tonic-gate if ((stq_ill != NULL) && !IAM_WRITER_ILL(stq_ill)) { 25067c478bd9Sstevel@tonic-gate if (stq_ill->ill_state_flags & ILL_CHANGING) { 25077c478bd9Sstevel@tonic-gate ill = stq_ill; 25087c478bd9Sstevel@tonic-gate error = EAGAIN; 25097c478bd9Sstevel@tonic-gate } else if ((stq_ill->ill_phyint->phyint_flags & PHYI_OFFLINE) || 25107c478bd9Sstevel@tonic-gate (ill_is_probeonly(stq_ill) && 25117c478bd9Sstevel@tonic-gate !(ire->ire_marks & IRE_MARK_HIDDEN))) { 25127c478bd9Sstevel@tonic-gate error = EINVAL; 25137c478bd9Sstevel@tonic-gate } 25147c478bd9Sstevel@tonic-gate goto done; 25157c478bd9Sstevel@tonic-gate } 25167c478bd9Sstevel@tonic-gate 25177c478bd9Sstevel@tonic-gate /* 25187c478bd9Sstevel@tonic-gate * We don't check for OFFLINE/FAILED in this case because 25197c478bd9Sstevel@tonic-gate * the source address selection logic (ipif_select_source) 25207c478bd9Sstevel@tonic-gate * may still select a source address from such an ill. The 25217c478bd9Sstevel@tonic-gate * assumption is that these addresses will be moved by in.mpathd 25227c478bd9Sstevel@tonic-gate * soon. (i.e. this is a race). However link local addresses 25237c478bd9Sstevel@tonic-gate * will not move and hence ipif_select_source_v6 tries to avoid 25247c478bd9Sstevel@tonic-gate * FAILED ills. Please see ipif_select_source_v6 for more info 25257c478bd9Sstevel@tonic-gate */ 25267c478bd9Sstevel@tonic-gate if ((ipif_ill != NULL) && !IAM_WRITER_ILL(ipif_ill) && 25277c478bd9Sstevel@tonic-gate (ipif_ill->ill_state_flags & ILL_CHANGING)) { 25287c478bd9Sstevel@tonic-gate ill = ipif_ill; 25297c478bd9Sstevel@tonic-gate error = EAGAIN; 25307c478bd9Sstevel@tonic-gate goto done; 25317c478bd9Sstevel@tonic-gate } 25327c478bd9Sstevel@tonic-gate 25337c478bd9Sstevel@tonic-gate if ((ire->ire_ipif != NULL) && !IAM_WRITER_IPIF(ire->ire_ipif) && 25347c478bd9Sstevel@tonic-gate (ire->ire_ipif->ipif_state_flags & IPIF_CHANGING)) { 25357c478bd9Sstevel@tonic-gate ill = ire->ire_ipif->ipif_ill; 25367c478bd9Sstevel@tonic-gate ASSERT(ill != NULL); 25377c478bd9Sstevel@tonic-gate error = EAGAIN; 25387c478bd9Sstevel@tonic-gate goto done; 25397c478bd9Sstevel@tonic-gate } 25407c478bd9Sstevel@tonic-gate 25417c478bd9Sstevel@tonic-gate done: 25427c478bd9Sstevel@tonic-gate if (error == EAGAIN && ILL_CAN_WAIT(ill, q)) { 25437c478bd9Sstevel@tonic-gate ipsq_t *ipsq = ill->ill_phyint->phyint_ipsq; 25447c478bd9Sstevel@tonic-gate mutex_enter(&ipsq->ipsq_lock); 25457c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 25467c478bd9Sstevel@tonic-gate ipsq_enq(ipsq, q, mp, func, NEW_OP, ill); 25477c478bd9Sstevel@tonic-gate mutex_exit(&ipsq->ipsq_lock); 25487c478bd9Sstevel@tonic-gate error = EINPROGRESS; 25497c478bd9Sstevel@tonic-gate } else if (error != 0) { 25507c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 25517c478bd9Sstevel@tonic-gate } 25527c478bd9Sstevel@tonic-gate 25537c478bd9Sstevel@tonic-gate RELEASE_CONN_LOCK(q); 25547c478bd9Sstevel@tonic-gate return (error); 25557c478bd9Sstevel@tonic-gate } 25567c478bd9Sstevel@tonic-gate 25577c478bd9Sstevel@tonic-gate /* 25587c478bd9Sstevel@tonic-gate * Add a fully initialized IRE to an appropriate table based on 25597c478bd9Sstevel@tonic-gate * ire_type. 2560c793af95Ssangeeta * 2561c793af95Ssangeeta * allow_unresolved == B_FALSE indicates a legacy code-path call 2562c793af95Ssangeeta * that has prohibited the addition of incomplete ire's. If this 2563c793af95Ssangeeta * parameter is set, and we find an nce that is in a state other 2564c793af95Ssangeeta * than ND_REACHABLE, we fail the add. Note that nce_state could be 2565b9c344b3Ssowmini * something other than ND_REACHABLE if the nce had just expired and 2566b9c344b3Ssowmini * the ire_create preceding the ire_add added a new ND_INITIAL nce. 25677c478bd9Sstevel@tonic-gate */ 25687c478bd9Sstevel@tonic-gate int 2569c793af95Ssangeeta ire_add(ire_t **irep, queue_t *q, mblk_t *mp, ipsq_func_t func, 2570c793af95Ssangeeta boolean_t allow_unresolved) 25717c478bd9Sstevel@tonic-gate { 25727c478bd9Sstevel@tonic-gate ire_t *ire1; 25737c478bd9Sstevel@tonic-gate ill_t *stq_ill = NULL; 25747c478bd9Sstevel@tonic-gate ill_t *ill; 25757c478bd9Sstevel@tonic-gate ipif_t *ipif = NULL; 25767c478bd9Sstevel@tonic-gate ill_walk_context_t ctx; 25777c478bd9Sstevel@tonic-gate ire_t *ire = *irep; 25787c478bd9Sstevel@tonic-gate int error; 2579dc3879f9Sjarrett boolean_t ire_is_mblk = B_FALSE; 2580dc3879f9Sjarrett tsol_gcgrp_t *gcgrp = NULL; 2581dc3879f9Sjarrett tsol_gcgrp_addr_t ga; 2582f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 25837c478bd9Sstevel@tonic-gate 25847c478bd9Sstevel@tonic-gate /* get ready for the day when original ire is not created as mblk */ 25857c478bd9Sstevel@tonic-gate if (ire->ire_mp != NULL) { 2586dc3879f9Sjarrett ire_is_mblk = B_TRUE; 25877c478bd9Sstevel@tonic-gate /* Copy the ire to a kmem_alloc'ed area */ 25887c478bd9Sstevel@tonic-gate ire1 = kmem_cache_alloc(ire_cache, KM_NOSLEEP); 25897c478bd9Sstevel@tonic-gate if (ire1 == NULL) { 25907c478bd9Sstevel@tonic-gate ip1dbg(("ire_add: alloc failed\n")); 25917c478bd9Sstevel@tonic-gate ire_delete(ire); 25927c478bd9Sstevel@tonic-gate *irep = NULL; 25937c478bd9Sstevel@tonic-gate return (ENOMEM); 25947c478bd9Sstevel@tonic-gate } 2595c793af95Ssangeeta ire->ire_marks &= ~IRE_MARK_UNCACHED; 25967c478bd9Sstevel@tonic-gate *ire1 = *ire; 25977c478bd9Sstevel@tonic-gate ire1->ire_mp = NULL; 2598c793af95Ssangeeta ire1->ire_stq_ifindex = 0; 25997c478bd9Sstevel@tonic-gate freeb(ire->ire_mp); 26007c478bd9Sstevel@tonic-gate ire = ire1; 26017c478bd9Sstevel@tonic-gate } 26027c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) 26037c478bd9Sstevel@tonic-gate stq_ill = (ill_t *)ire->ire_stq->q_ptr; 26047c478bd9Sstevel@tonic-gate 26057c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE) { 26067c478bd9Sstevel@tonic-gate /* 26077c478bd9Sstevel@tonic-gate * If this interface is FAILED, or INACTIVE or has hit 26087c478bd9Sstevel@tonic-gate * the FAILBACK=no case, we create IRE_CACHES marked 26097c478bd9Sstevel@tonic-gate * HIDDEN for some special cases e.g. bind to 26107c478bd9Sstevel@tonic-gate * IPIF_NOFAILOVER address etc. So, if this interface 26117c478bd9Sstevel@tonic-gate * is FAILED/INACTIVE/hit FAILBACK=no case, and we are 26127c478bd9Sstevel@tonic-gate * not creating hidden ires, we should not allow that. 26137c478bd9Sstevel@tonic-gate * This happens because the state of the interface 26147c478bd9Sstevel@tonic-gate * changed while we were waiting in ARP. If this is the 26157c478bd9Sstevel@tonic-gate * daemon sending probes, the next probe will create 26167c478bd9Sstevel@tonic-gate * HIDDEN ires and we will create an ire then. This 26177c478bd9Sstevel@tonic-gate * cannot happen with NDP currently because IRE is 26187c478bd9Sstevel@tonic-gate * never queued in NDP. But it can happen in the 26197c478bd9Sstevel@tonic-gate * future when we have external resolvers with IPv6. 26207c478bd9Sstevel@tonic-gate * If the interface gets marked with OFFLINE while we 26217c478bd9Sstevel@tonic-gate * are waiting in ARP, don't add the ire. 26227c478bd9Sstevel@tonic-gate */ 26237c478bd9Sstevel@tonic-gate if ((stq_ill->ill_phyint->phyint_flags & PHYI_OFFLINE) || 26247c478bd9Sstevel@tonic-gate (ill_is_probeonly(stq_ill) && 26257c478bd9Sstevel@tonic-gate !(ire->ire_marks & IRE_MARK_HIDDEN))) { 26267c478bd9Sstevel@tonic-gate /* 26277c478bd9Sstevel@tonic-gate * We don't know whether it is a valid ipif or not. 26287c478bd9Sstevel@tonic-gate * unless we do the check below. So, set it to NULL. 26297c478bd9Sstevel@tonic-gate */ 26307c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 26317c478bd9Sstevel@tonic-gate ire_delete(ire); 26327c478bd9Sstevel@tonic-gate *irep = NULL; 26337c478bd9Sstevel@tonic-gate return (EINVAL); 26347c478bd9Sstevel@tonic-gate } 26357c478bd9Sstevel@tonic-gate } 26367c478bd9Sstevel@tonic-gate 26377c478bd9Sstevel@tonic-gate if (stq_ill != NULL && ire->ire_type == IRE_CACHE && 26387c478bd9Sstevel@tonic-gate stq_ill->ill_net_type == IRE_IF_RESOLVER) { 2639f4b3ec61Sdh155122 rw_enter(&ipst->ips_ill_g_lock, RW_READER); 2640f4b3ec61Sdh155122 ill = ILL_START_WALK_ALL(&ctx, ipst); 26417c478bd9Sstevel@tonic-gate for (; ill != NULL; ill = ill_next(&ctx, ill)) { 26427c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 26437c478bd9Sstevel@tonic-gate if (ill->ill_state_flags & ILL_CONDEMNED) { 26447c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 26457c478bd9Sstevel@tonic-gate continue; 26467c478bd9Sstevel@tonic-gate } 26477c478bd9Sstevel@tonic-gate /* 26487c478bd9Sstevel@tonic-gate * We need to make sure that the ipif is a valid one 26497c478bd9Sstevel@tonic-gate * before adding the IRE_CACHE. This happens only 26507c478bd9Sstevel@tonic-gate * with IRE_CACHE when there is an external resolver. 26517c478bd9Sstevel@tonic-gate * 26527c478bd9Sstevel@tonic-gate * We can unplumb a logical interface while the 26537c478bd9Sstevel@tonic-gate * packet is waiting in ARP with the IRE. Then, 26547c478bd9Sstevel@tonic-gate * later on when we feed the IRE back, the ipif 26557c478bd9Sstevel@tonic-gate * has to be re-checked. This can't happen with 26567c478bd9Sstevel@tonic-gate * NDP currently, as we never queue the IRE with 26577c478bd9Sstevel@tonic-gate * the packet. We always try to recreate the IRE 26587c478bd9Sstevel@tonic-gate * when the resolution is completed. But, we do 26597c478bd9Sstevel@tonic-gate * it for IPv6 also here so that in future if 26607c478bd9Sstevel@tonic-gate * we have external resolvers, it will work without 26617c478bd9Sstevel@tonic-gate * any change. 26627c478bd9Sstevel@tonic-gate */ 26637c478bd9Sstevel@tonic-gate ipif = ipif_lookup_seqid(ill, ire->ire_ipif_seqid); 26647c478bd9Sstevel@tonic-gate if (ipif != NULL) { 26657c478bd9Sstevel@tonic-gate ipif_refhold_locked(ipif); 26667c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 26677c478bd9Sstevel@tonic-gate break; 26687c478bd9Sstevel@tonic-gate } 26697c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 26707c478bd9Sstevel@tonic-gate } 2671f4b3ec61Sdh155122 rw_exit(&ipst->ips_ill_g_lock); 26727c478bd9Sstevel@tonic-gate if (ipif == NULL || 26737c478bd9Sstevel@tonic-gate (ipif->ipif_isv6 && 26747c478bd9Sstevel@tonic-gate !IN6_ARE_ADDR_EQUAL(&ire->ire_src_addr_v6, 26757c478bd9Sstevel@tonic-gate &ipif->ipif_v6src_addr)) || 26767c478bd9Sstevel@tonic-gate (!ipif->ipif_isv6 && 26777c478bd9Sstevel@tonic-gate ire->ire_src_addr != ipif->ipif_src_addr) || 267845916cd2Sjpk ire->ire_zoneid != ipif->ipif_zoneid) { 26797c478bd9Sstevel@tonic-gate 26807c478bd9Sstevel@tonic-gate if (ipif != NULL) 26817c478bd9Sstevel@tonic-gate ipif_refrele(ipif); 26827c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 26837c478bd9Sstevel@tonic-gate ire_delete(ire); 26847c478bd9Sstevel@tonic-gate *irep = NULL; 26857c478bd9Sstevel@tonic-gate return (EINVAL); 26867c478bd9Sstevel@tonic-gate } 26877c478bd9Sstevel@tonic-gate 26887c478bd9Sstevel@tonic-gate 26897c478bd9Sstevel@tonic-gate ASSERT(ill != NULL); 26907c478bd9Sstevel@tonic-gate /* 26917c478bd9Sstevel@tonic-gate * If this group was dismantled while this packets was 26927c478bd9Sstevel@tonic-gate * queued in ARP, don't add it here. 26937c478bd9Sstevel@tonic-gate */ 26947c478bd9Sstevel@tonic-gate if (ire->ire_ipif->ipif_ill->ill_group != ill->ill_group) { 26957c478bd9Sstevel@tonic-gate /* We don't want ire_inactive bump stats for this */ 26967c478bd9Sstevel@tonic-gate ipif_refrele(ipif); 26977c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 26987c478bd9Sstevel@tonic-gate ire_delete(ire); 26997c478bd9Sstevel@tonic-gate *irep = NULL; 27007c478bd9Sstevel@tonic-gate return (EINVAL); 27017c478bd9Sstevel@tonic-gate } 2702dc3879f9Sjarrett 2703dc3879f9Sjarrett /* 2704dc3879f9Sjarrett * Since we didn't attach label security attributes to the 2705dc3879f9Sjarrett * ire for the resolver case, we need to add it now. (only 2706dc3879f9Sjarrett * for v4 resolver and v6 xresolv case). 2707dc3879f9Sjarrett */ 2708dc3879f9Sjarrett if (is_system_labeled() && ire_is_mblk) { 2709dc3879f9Sjarrett if (ire->ire_ipversion == IPV4_VERSION) { 2710dc3879f9Sjarrett ga.ga_af = AF_INET; 2711dc3879f9Sjarrett IN6_IPADDR_TO_V4MAPPED(ire->ire_gateway_addr != 2712dc3879f9Sjarrett INADDR_ANY ? ire->ire_gateway_addr : 2713dc3879f9Sjarrett ire->ire_addr, &ga.ga_addr); 2714dc3879f9Sjarrett } else { 2715dc3879f9Sjarrett ga.ga_af = AF_INET6; 2716dc3879f9Sjarrett ga.ga_addr = IN6_IS_ADDR_UNSPECIFIED( 2717dc3879f9Sjarrett &ire->ire_gateway_addr_v6) ? 2718dc3879f9Sjarrett ire->ire_addr_v6 : 2719dc3879f9Sjarrett ire->ire_gateway_addr_v6; 2720dc3879f9Sjarrett } 2721dc3879f9Sjarrett gcgrp = gcgrp_lookup(&ga, B_FALSE); 2722dc3879f9Sjarrett error = tsol_ire_init_gwattr(ire, ire->ire_ipversion, 2723dc3879f9Sjarrett NULL, gcgrp); 2724dc3879f9Sjarrett if (error != 0) { 2725dc3879f9Sjarrett if (gcgrp != NULL) { 2726dc3879f9Sjarrett GCGRP_REFRELE(gcgrp); 2727dc3879f9Sjarrett gcgrp = NULL; 2728dc3879f9Sjarrett } 2729dc3879f9Sjarrett ipif_refrele(ipif); 2730dc3879f9Sjarrett ire->ire_ipif = NULL; 2731dc3879f9Sjarrett ire_delete(ire); 2732dc3879f9Sjarrett *irep = NULL; 2733dc3879f9Sjarrett return (error); 2734dc3879f9Sjarrett } 2735dc3879f9Sjarrett } 27367c478bd9Sstevel@tonic-gate } 27377c478bd9Sstevel@tonic-gate 27387c478bd9Sstevel@tonic-gate /* 27397c478bd9Sstevel@tonic-gate * In case ire was changed 27407c478bd9Sstevel@tonic-gate */ 27417c478bd9Sstevel@tonic-gate *irep = ire; 27425c0b7edeSseb if (ire->ire_ipversion == IPV6_VERSION) 27437c478bd9Sstevel@tonic-gate error = ire_add_v6(irep, q, mp, func); 27447c478bd9Sstevel@tonic-gate else 27455c0b7edeSseb error = ire_add_v4(irep, q, mp, func, allow_unresolved); 27467c478bd9Sstevel@tonic-gate if (ipif != NULL) 27477c478bd9Sstevel@tonic-gate ipif_refrele(ipif); 27487c478bd9Sstevel@tonic-gate return (error); 27497c478bd9Sstevel@tonic-gate } 27507c478bd9Sstevel@tonic-gate 27517c478bd9Sstevel@tonic-gate /* 2752dc3879f9Sjarrett * Add an initialized IRE to an appropriate table based on ire_type. 27537c478bd9Sstevel@tonic-gate * 27546bdb8e66Sdd193516 * The forward table contains IRE_PREFIX/IRE_HOST and 27557c478bd9Sstevel@tonic-gate * IRE_IF_RESOLVER/IRE_IF_NORESOLVER and IRE_DEFAULT. 27567c478bd9Sstevel@tonic-gate * 27577c478bd9Sstevel@tonic-gate * The cache table contains IRE_BROADCAST/IRE_LOCAL/IRE_LOOPBACK 27587c478bd9Sstevel@tonic-gate * and IRE_CACHE. 27597c478bd9Sstevel@tonic-gate * 27607c478bd9Sstevel@tonic-gate * NOTE : This function is called as writer though not required 27617c478bd9Sstevel@tonic-gate * by this function. 27627c478bd9Sstevel@tonic-gate */ 27637c478bd9Sstevel@tonic-gate static int 2764c793af95Ssangeeta ire_add_v4(ire_t **ire_p, queue_t *q, mblk_t *mp, ipsq_func_t func, 2765c793af95Ssangeeta boolean_t allow_unresolved) 27667c478bd9Sstevel@tonic-gate { 27677c478bd9Sstevel@tonic-gate ire_t *ire1; 27687c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 27697c478bd9Sstevel@tonic-gate ire_t **irep; 27707c478bd9Sstevel@tonic-gate int flags; 27717c478bd9Sstevel@tonic-gate ire_t *pire = NULL; 27727c478bd9Sstevel@tonic-gate ill_t *stq_ill; 27737c478bd9Sstevel@tonic-gate ire_t *ire = *ire_p; 27747c478bd9Sstevel@tonic-gate int error; 2775c793af95Ssangeeta boolean_t need_refrele = B_FALSE; 2776c793af95Ssangeeta nce_t *nce; 2777f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 27787c478bd9Sstevel@tonic-gate 27797c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) 27807c478bd9Sstevel@tonic-gate ASSERT(!MUTEX_HELD(&ire->ire_ipif->ipif_ill->ill_lock)); 27817c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) 27827c478bd9Sstevel@tonic-gate ASSERT(!MUTEX_HELD( 27837c478bd9Sstevel@tonic-gate &((ill_t *)(ire->ire_stq->q_ptr))->ill_lock)); 27847c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 27857c478bd9Sstevel@tonic-gate ASSERT(ire->ire_mp == NULL); /* Calls should go through ire_add */ 27867c478bd9Sstevel@tonic-gate 27877c478bd9Sstevel@tonic-gate /* Find the appropriate list head. */ 27887c478bd9Sstevel@tonic-gate switch (ire->ire_type) { 27897c478bd9Sstevel@tonic-gate case IRE_HOST: 27907c478bd9Sstevel@tonic-gate ire->ire_mask = IP_HOST_MASK; 27917c478bd9Sstevel@tonic-gate ire->ire_masklen = IP_ABITS; 27927c478bd9Sstevel@tonic-gate if ((ire->ire_flags & RTF_SETSRC) == 0) 27937c478bd9Sstevel@tonic-gate ire->ire_src_addr = 0; 27947c478bd9Sstevel@tonic-gate break; 27957c478bd9Sstevel@tonic-gate case IRE_CACHE: 27967c478bd9Sstevel@tonic-gate case IRE_BROADCAST: 27977c478bd9Sstevel@tonic-gate case IRE_LOCAL: 27987c478bd9Sstevel@tonic-gate case IRE_LOOPBACK: 27997c478bd9Sstevel@tonic-gate ire->ire_mask = IP_HOST_MASK; 28007c478bd9Sstevel@tonic-gate ire->ire_masklen = IP_ABITS; 28017c478bd9Sstevel@tonic-gate break; 28027c478bd9Sstevel@tonic-gate case IRE_PREFIX: 28037c478bd9Sstevel@tonic-gate if ((ire->ire_flags & RTF_SETSRC) == 0) 28047c478bd9Sstevel@tonic-gate ire->ire_src_addr = 0; 28057c478bd9Sstevel@tonic-gate break; 28067c478bd9Sstevel@tonic-gate case IRE_DEFAULT: 28077c478bd9Sstevel@tonic-gate if ((ire->ire_flags & RTF_SETSRC) == 0) 28087c478bd9Sstevel@tonic-gate ire->ire_src_addr = 0; 28097c478bd9Sstevel@tonic-gate break; 28107c478bd9Sstevel@tonic-gate case IRE_IF_RESOLVER: 28117c478bd9Sstevel@tonic-gate case IRE_IF_NORESOLVER: 28127c478bd9Sstevel@tonic-gate break; 28137c478bd9Sstevel@tonic-gate default: 2814c793af95Ssangeeta ip0dbg(("ire_add_v4: ire %p has unrecognized IRE type (%d)\n", 2815c793af95Ssangeeta (void *)ire, ire->ire_type)); 28167c478bd9Sstevel@tonic-gate ire_delete(ire); 28177c478bd9Sstevel@tonic-gate *ire_p = NULL; 28187c478bd9Sstevel@tonic-gate return (EINVAL); 28197c478bd9Sstevel@tonic-gate } 28207c478bd9Sstevel@tonic-gate 28217c478bd9Sstevel@tonic-gate /* Make sure the address is properly masked. */ 28227c478bd9Sstevel@tonic-gate ire->ire_addr &= ire->ire_mask; 28237c478bd9Sstevel@tonic-gate 28247c478bd9Sstevel@tonic-gate /* 28257c478bd9Sstevel@tonic-gate * ip_newroute/ip_newroute_multi are unable to prevent the deletion 28267c478bd9Sstevel@tonic-gate * of the interface route while adding an IRE_CACHE for an on-link 28277c478bd9Sstevel@tonic-gate * destination in the IRE_IF_RESOLVER case, since the ire has to 28287c478bd9Sstevel@tonic-gate * go to ARP and return. We can't do a REFHOLD on the 28297c478bd9Sstevel@tonic-gate * associated interface ire for fear of ARP freeing the message. 28307c478bd9Sstevel@tonic-gate * Here we look up the interface ire in the forwarding table and 28317c478bd9Sstevel@tonic-gate * make sure that the interface route has not been deleted. 28327c478bd9Sstevel@tonic-gate */ 28337c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE && ire->ire_gateway_addr == 0 && 28347c478bd9Sstevel@tonic-gate ((ill_t *)ire->ire_stq->q_ptr)->ill_net_type == IRE_IF_RESOLVER) { 2835c793af95Ssangeeta 28367c478bd9Sstevel@tonic-gate ASSERT(ire->ire_max_fragp == NULL); 28377c478bd9Sstevel@tonic-gate if (CLASSD(ire->ire_addr) && !(ire->ire_flags & RTF_SETSRC)) { 28387c478bd9Sstevel@tonic-gate /* 28397c478bd9Sstevel@tonic-gate * The ihandle that we used in ip_newroute_multi 28407c478bd9Sstevel@tonic-gate * comes from the interface route corresponding 28417c478bd9Sstevel@tonic-gate * to ire_ipif. Lookup here to see if it exists 28427c478bd9Sstevel@tonic-gate * still. 28437c478bd9Sstevel@tonic-gate * If the ire has a source address assigned using 28447c478bd9Sstevel@tonic-gate * RTF_SETSRC, ire_ipif is the logical interface holding 28457c478bd9Sstevel@tonic-gate * this source address, so we can't use it to check for 28467c478bd9Sstevel@tonic-gate * the existence of the interface route. Instead we rely 28477c478bd9Sstevel@tonic-gate * on the brute force ihandle search in 28487c478bd9Sstevel@tonic-gate * ire_ihandle_lookup_onlink() below. 28497c478bd9Sstevel@tonic-gate */ 28507c478bd9Sstevel@tonic-gate pire = ipif_to_ire(ire->ire_ipif); 28517c478bd9Sstevel@tonic-gate if (pire == NULL) { 28527c478bd9Sstevel@tonic-gate ire_delete(ire); 28537c478bd9Sstevel@tonic-gate *ire_p = NULL; 28547c478bd9Sstevel@tonic-gate return (EINVAL); 28557c478bd9Sstevel@tonic-gate } else if (pire->ire_ihandle != ire->ire_ihandle) { 28567c478bd9Sstevel@tonic-gate ire_refrele(pire); 28577c478bd9Sstevel@tonic-gate ire_delete(ire); 28587c478bd9Sstevel@tonic-gate *ire_p = NULL; 28597c478bd9Sstevel@tonic-gate return (EINVAL); 28607c478bd9Sstevel@tonic-gate } 28617c478bd9Sstevel@tonic-gate } else { 28627c478bd9Sstevel@tonic-gate pire = ire_ihandle_lookup_onlink(ire); 28637c478bd9Sstevel@tonic-gate if (pire == NULL) { 28647c478bd9Sstevel@tonic-gate ire_delete(ire); 28657c478bd9Sstevel@tonic-gate *ire_p = NULL; 28667c478bd9Sstevel@tonic-gate return (EINVAL); 28677c478bd9Sstevel@tonic-gate } 28687c478bd9Sstevel@tonic-gate } 28697c478bd9Sstevel@tonic-gate /* Prevent pire from getting deleted */ 28707c478bd9Sstevel@tonic-gate IRB_REFHOLD(pire->ire_bucket); 28717c478bd9Sstevel@tonic-gate /* Has it been removed already ? */ 28727c478bd9Sstevel@tonic-gate if (pire->ire_marks & IRE_MARK_CONDEMNED) { 28737c478bd9Sstevel@tonic-gate IRB_REFRELE(pire->ire_bucket); 28747c478bd9Sstevel@tonic-gate ire_refrele(pire); 28757c478bd9Sstevel@tonic-gate ire_delete(ire); 28767c478bd9Sstevel@tonic-gate *ire_p = NULL; 28777c478bd9Sstevel@tonic-gate return (EINVAL); 28787c478bd9Sstevel@tonic-gate } 28797c478bd9Sstevel@tonic-gate } else { 28807c478bd9Sstevel@tonic-gate ASSERT(ire->ire_max_fragp != NULL); 28817c478bd9Sstevel@tonic-gate } 28827c478bd9Sstevel@tonic-gate flags = (MATCH_IRE_MASK | MATCH_IRE_TYPE | MATCH_IRE_GW); 28837c478bd9Sstevel@tonic-gate 28847c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) { 28857c478bd9Sstevel@tonic-gate /* 28867c478bd9Sstevel@tonic-gate * We use MATCH_IRE_IPIF while adding IRE_CACHES only 28877c478bd9Sstevel@tonic-gate * for historic reasons and to maintain symmetry with 28887c478bd9Sstevel@tonic-gate * IPv6 code path. Historically this was used by 28897c478bd9Sstevel@tonic-gate * multicast code to create multiple IRE_CACHES on 28907c478bd9Sstevel@tonic-gate * a single ill with different ipifs. This was used 28917c478bd9Sstevel@tonic-gate * so that multicast packets leaving the node had the 28927c478bd9Sstevel@tonic-gate * right source address. This is no longer needed as 28937c478bd9Sstevel@tonic-gate * ip_wput initializes the address correctly. 28947c478bd9Sstevel@tonic-gate */ 28957c478bd9Sstevel@tonic-gate flags |= MATCH_IRE_IPIF; 28967c478bd9Sstevel@tonic-gate /* 28977c478bd9Sstevel@tonic-gate * If we are creating hidden ires, make sure we search on 28987c478bd9Sstevel@tonic-gate * this ill (MATCH_IRE_ILL) and a hidden ire, 28997c478bd9Sstevel@tonic-gate * while we are searching for duplicates below. Otherwise we 29007c478bd9Sstevel@tonic-gate * could potentially find an IRE on some other interface 29017c478bd9Sstevel@tonic-gate * and it may not be a IRE marked with IRE_MARK_HIDDEN. We 29027c478bd9Sstevel@tonic-gate * shouldn't do this as this will lead to an infinite loop 29037c478bd9Sstevel@tonic-gate * (if we get to ip_wput again) eventually we need an hidden 29047c478bd9Sstevel@tonic-gate * ire for this packet to go out. MATCH_IRE_ILL is explicitly 29057c478bd9Sstevel@tonic-gate * done below. 29067c478bd9Sstevel@tonic-gate */ 29077c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE && 29087c478bd9Sstevel@tonic-gate (ire->ire_marks & IRE_MARK_HIDDEN)) 29097c478bd9Sstevel@tonic-gate flags |= (MATCH_IRE_MARK_HIDDEN); 29107c478bd9Sstevel@tonic-gate } 2911c793af95Ssangeeta if ((ire->ire_type & IRE_CACHETABLE) == 0) { 2912c793af95Ssangeeta irb_ptr = ire_get_bucket(ire); 2913c793af95Ssangeeta need_refrele = B_TRUE; 2914c793af95Ssangeeta if (irb_ptr == NULL) { 2915c793af95Ssangeeta /* 2916c793af95Ssangeeta * This assumes that the ire has not added 2917c793af95Ssangeeta * a reference to the ipif. 2918c793af95Ssangeeta */ 2919c793af95Ssangeeta ire->ire_ipif = NULL; 2920c793af95Ssangeeta ire_delete(ire); 2921c793af95Ssangeeta if (pire != NULL) { 2922c793af95Ssangeeta IRB_REFRELE(pire->ire_bucket); 2923c793af95Ssangeeta ire_refrele(pire); 2924c793af95Ssangeeta } 2925c793af95Ssangeeta *ire_p = NULL; 2926c793af95Ssangeeta return (EINVAL); 2927c793af95Ssangeeta } 2928c793af95Ssangeeta } else { 2929f4b3ec61Sdh155122 irb_ptr = &(ipst->ips_ip_cache_table[IRE_ADDR_HASH( 2930f4b3ec61Sdh155122 ire->ire_addr, ipst->ips_ip_cache_table_size)]); 2931c793af95Ssangeeta } 29327c478bd9Sstevel@tonic-gate 29337c478bd9Sstevel@tonic-gate /* 29347c478bd9Sstevel@tonic-gate * Start the atomic add of the ire. Grab the ill locks, 29357c478bd9Sstevel@tonic-gate * ill_g_usesrc_lock and the bucket lock. Check for condemned 29367c478bd9Sstevel@tonic-gate * 29377c478bd9Sstevel@tonic-gate * If ipif or ill is changing ire_atomic_start() may queue the 29387c478bd9Sstevel@tonic-gate * request and return EINPROGRESS. 2939f4b3ec61Sdh155122 * To avoid lock order problems, get the ndp4->ndp_g_lock. 29407c478bd9Sstevel@tonic-gate */ 2941f4b3ec61Sdh155122 mutex_enter(&ipst->ips_ndp4->ndp_g_lock); 29427c478bd9Sstevel@tonic-gate error = ire_atomic_start(irb_ptr, ire, q, mp, func); 29437c478bd9Sstevel@tonic-gate if (error != 0) { 2944f4b3ec61Sdh155122 mutex_exit(&ipst->ips_ndp4->ndp_g_lock); 29457c478bd9Sstevel@tonic-gate /* 29467c478bd9Sstevel@tonic-gate * We don't know whether it is a valid ipif or not. 29477c478bd9Sstevel@tonic-gate * So, set it to NULL. This assumes that the ire has not added 29487c478bd9Sstevel@tonic-gate * a reference to the ipif. 29497c478bd9Sstevel@tonic-gate */ 29507c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 29517c478bd9Sstevel@tonic-gate ire_delete(ire); 29527c478bd9Sstevel@tonic-gate if (pire != NULL) { 29537c478bd9Sstevel@tonic-gate IRB_REFRELE(pire->ire_bucket); 29547c478bd9Sstevel@tonic-gate ire_refrele(pire); 29557c478bd9Sstevel@tonic-gate } 29567c478bd9Sstevel@tonic-gate *ire_p = NULL; 2957c793af95Ssangeeta if (need_refrele) 2958c793af95Ssangeeta IRB_REFRELE(irb_ptr); 29597c478bd9Sstevel@tonic-gate return (error); 29607c478bd9Sstevel@tonic-gate } 29617c478bd9Sstevel@tonic-gate /* 29627c478bd9Sstevel@tonic-gate * To avoid creating ires having stale values for the ire_max_frag 29637c478bd9Sstevel@tonic-gate * we get the latest value atomically here. For more details 29647c478bd9Sstevel@tonic-gate * see the block comment in ip_sioctl_mtu and in DL_NOTE_SDU_CHANGE 29657c478bd9Sstevel@tonic-gate * in ip_rput_dlpi_writer 29667c478bd9Sstevel@tonic-gate */ 29677c478bd9Sstevel@tonic-gate if (ire->ire_max_fragp == NULL) { 29687c478bd9Sstevel@tonic-gate if (CLASSD(ire->ire_addr)) 29697c478bd9Sstevel@tonic-gate ire->ire_max_frag = ire->ire_ipif->ipif_mtu; 29707c478bd9Sstevel@tonic-gate else 29717c478bd9Sstevel@tonic-gate ire->ire_max_frag = pire->ire_max_frag; 29727c478bd9Sstevel@tonic-gate } else { 29737c478bd9Sstevel@tonic-gate uint_t max_frag; 29747c478bd9Sstevel@tonic-gate 29757c478bd9Sstevel@tonic-gate max_frag = *ire->ire_max_fragp; 29767c478bd9Sstevel@tonic-gate ire->ire_max_fragp = NULL; 29777c478bd9Sstevel@tonic-gate ire->ire_max_frag = max_frag; 29787c478bd9Sstevel@tonic-gate } 29797c478bd9Sstevel@tonic-gate /* 29807c478bd9Sstevel@tonic-gate * Atomically check for duplicate and insert in the table. 29817c478bd9Sstevel@tonic-gate */ 29827c478bd9Sstevel@tonic-gate for (ire1 = irb_ptr->irb_ire; ire1 != NULL; ire1 = ire1->ire_next) { 29837c478bd9Sstevel@tonic-gate if (ire1->ire_marks & IRE_MARK_CONDEMNED) 29847c478bd9Sstevel@tonic-gate continue; 29857c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) { 29867c478bd9Sstevel@tonic-gate /* 29877c478bd9Sstevel@tonic-gate * We do MATCH_IRE_ILL implicitly here for IREs 29887c478bd9Sstevel@tonic-gate * with a non-null ire_ipif, including IRE_CACHEs. 29897c478bd9Sstevel@tonic-gate * As ire_ipif and ire_stq could point to two 29907c478bd9Sstevel@tonic-gate * different ills, we can't pass just ire_ipif to 29917c478bd9Sstevel@tonic-gate * ire_match_args and get a match on both ills. 29927c478bd9Sstevel@tonic-gate * This is just needed for duplicate checks here and 29937c478bd9Sstevel@tonic-gate * so we don't add an extra argument to 29947c478bd9Sstevel@tonic-gate * ire_match_args for this. Do it locally. 29957c478bd9Sstevel@tonic-gate * 29967c478bd9Sstevel@tonic-gate * NOTE : Currently there is no part of the code 29977c478bd9Sstevel@tonic-gate * that asks for both MATH_IRE_IPIF and MATCH_IRE_ILL 29987c478bd9Sstevel@tonic-gate * match for IRE_CACHEs. Thus we don't want to 29997c478bd9Sstevel@tonic-gate * extend the arguments to ire_match_args. 30007c478bd9Sstevel@tonic-gate */ 30017c478bd9Sstevel@tonic-gate if (ire1->ire_stq != ire->ire_stq) 30027c478bd9Sstevel@tonic-gate continue; 30037c478bd9Sstevel@tonic-gate /* 30047c478bd9Sstevel@tonic-gate * Multiroute IRE_CACHEs for a given destination can 30057c478bd9Sstevel@tonic-gate * have the same ire_ipif, typically if their source 30067c478bd9Sstevel@tonic-gate * address is forced using RTF_SETSRC, and the same 30077c478bd9Sstevel@tonic-gate * send-to queue. We differentiate them using the parent 30087c478bd9Sstevel@tonic-gate * handle. 30097c478bd9Sstevel@tonic-gate */ 30107c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_CACHE && 30117c478bd9Sstevel@tonic-gate (ire1->ire_flags & RTF_MULTIRT) && 30127c478bd9Sstevel@tonic-gate (ire->ire_flags & RTF_MULTIRT) && 30137c478bd9Sstevel@tonic-gate (ire1->ire_phandle != ire->ire_phandle)) 30147c478bd9Sstevel@tonic-gate continue; 30157c478bd9Sstevel@tonic-gate } 30167c478bd9Sstevel@tonic-gate if (ire1->ire_zoneid != ire->ire_zoneid) 30177c478bd9Sstevel@tonic-gate continue; 30187c478bd9Sstevel@tonic-gate if (ire_match_args(ire1, ire->ire_addr, ire->ire_mask, 30197c478bd9Sstevel@tonic-gate ire->ire_gateway_addr, ire->ire_type, ire->ire_ipif, 302045916cd2Sjpk ire->ire_zoneid, 0, NULL, flags)) { 30217c478bd9Sstevel@tonic-gate /* 30227c478bd9Sstevel@tonic-gate * Return the old ire after doing a REFHOLD. 30237c478bd9Sstevel@tonic-gate * As most of the callers continue to use the IRE 30247c478bd9Sstevel@tonic-gate * after adding, we return a held ire. This will 30257c478bd9Sstevel@tonic-gate * avoid a lookup in the caller again. If the callers 30267c478bd9Sstevel@tonic-gate * don't want to use it, they need to do a REFRELE. 30277c478bd9Sstevel@tonic-gate */ 30287c478bd9Sstevel@tonic-gate ip1dbg(("found dup ire existing %p new %p", 30297c478bd9Sstevel@tonic-gate (void *)ire1, (void *)ire)); 30307c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire1); 30317c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 3032f4b3ec61Sdh155122 mutex_exit(&ipst->ips_ndp4->ndp_g_lock); 30337c478bd9Sstevel@tonic-gate ire_delete(ire); 30347c478bd9Sstevel@tonic-gate if (pire != NULL) { 30357c478bd9Sstevel@tonic-gate /* 30367c478bd9Sstevel@tonic-gate * Assert that it is not removed from the 30377c478bd9Sstevel@tonic-gate * list yet. 30387c478bd9Sstevel@tonic-gate */ 30397c478bd9Sstevel@tonic-gate ASSERT(pire->ire_ptpn != NULL); 30407c478bd9Sstevel@tonic-gate IRB_REFRELE(pire->ire_bucket); 30417c478bd9Sstevel@tonic-gate ire_refrele(pire); 30427c478bd9Sstevel@tonic-gate } 30437c478bd9Sstevel@tonic-gate *ire_p = ire1; 3044c793af95Ssangeeta if (need_refrele) 3045c793af95Ssangeeta IRB_REFRELE(irb_ptr); 30467c478bd9Sstevel@tonic-gate return (0); 30477c478bd9Sstevel@tonic-gate } 30487c478bd9Sstevel@tonic-gate } 3049c793af95Ssangeeta if (ire->ire_type & IRE_CACHE) { 3050c793af95Ssangeeta ASSERT(ire->ire_stq != NULL); 3051c793af95Ssangeeta nce = ndp_lookup_v4(ire_to_ill(ire), 3052c793af95Ssangeeta ((ire->ire_gateway_addr != INADDR_ANY) ? 3053c793af95Ssangeeta &ire->ire_gateway_addr : &ire->ire_addr), 3054c793af95Ssangeeta B_TRUE); 3055c793af95Ssangeeta if (nce != NULL) 3056c793af95Ssangeeta mutex_enter(&nce->nce_lock); 3057c793af95Ssangeeta /* 3058c793af95Ssangeeta * if the nce is NCE_F_CONDEMNED, or if it is not ND_REACHABLE 3059c793af95Ssangeeta * and the caller has prohibited the addition of incomplete 3060c793af95Ssangeeta * ire's, we fail the add. Note that nce_state could be 3061b9c344b3Ssowmini * something other than ND_REACHABLE if the nce had 3062b9c344b3Ssowmini * just expired and the ire_create preceding the 3063b9c344b3Ssowmini * ire_add added a new ND_INITIAL nce. 3064c793af95Ssangeeta */ 3065c793af95Ssangeeta if ((nce == NULL) || 3066c793af95Ssangeeta (nce->nce_flags & NCE_F_CONDEMNED) || 3067c793af95Ssangeeta (!allow_unresolved && 3068107875b0Ssangeeta (nce->nce_state != ND_REACHABLE))) { 3069b9c344b3Ssowmini if (nce != NULL) { 3070b9c344b3Ssowmini DTRACE_PROBE1(ire__bad__nce, nce_t *, nce); 3071c793af95Ssangeeta mutex_exit(&nce->nce_lock); 3072b9c344b3Ssowmini } 3073c793af95Ssangeeta ire_atomic_end(irb_ptr, ire); 3074f4b3ec61Sdh155122 mutex_exit(&ipst->ips_ndp4->ndp_g_lock); 3075c793af95Ssangeeta if (nce != NULL) 3076c793af95Ssangeeta NCE_REFRELE(nce); 3077c793af95Ssangeeta DTRACE_PROBE1(ire__no__nce, ire_t *, ire); 3078c793af95Ssangeeta ire_delete(ire); 3079c793af95Ssangeeta if (pire != NULL) { 3080c793af95Ssangeeta IRB_REFRELE(pire->ire_bucket); 3081c793af95Ssangeeta ire_refrele(pire); 3082c793af95Ssangeeta } 3083c793af95Ssangeeta *ire_p = NULL; 3084c793af95Ssangeeta if (need_refrele) 3085c793af95Ssangeeta IRB_REFRELE(irb_ptr); 3086c793af95Ssangeeta return (EINVAL); 3087c793af95Ssangeeta } else { 3088c793af95Ssangeeta ire->ire_nce = nce; 3089c793af95Ssangeeta mutex_exit(&nce->nce_lock); 3090c793af95Ssangeeta /* 3091c793af95Ssangeeta * We are associating this nce to the ire, so 3092c793af95Ssangeeta * change the nce ref taken in ndp_lookup_v4() from 3093c793af95Ssangeeta * NCE_REFHOLD to NCE_REFHOLD_NOTR 3094c793af95Ssangeeta */ 3095c793af95Ssangeeta NCE_REFHOLD_TO_REFHOLD_NOTR(ire->ire_nce); 3096c793af95Ssangeeta } 3097c793af95Ssangeeta } 30987c478bd9Sstevel@tonic-gate /* 30997c478bd9Sstevel@tonic-gate * Make it easy for ip_wput_ire() to hit multiple broadcast ires by 31007c478bd9Sstevel@tonic-gate * grouping identical addresses together on the hash chain. We also 31017c478bd9Sstevel@tonic-gate * don't want to send multiple copies out if there are two ills part 31027c478bd9Sstevel@tonic-gate * of the same group. Thus we group the ires with same addr and same 31037c478bd9Sstevel@tonic-gate * ill group together so that ip_wput_ire can easily skip all the 31047c478bd9Sstevel@tonic-gate * ires with same addr and same group after sending the first copy. 31057c478bd9Sstevel@tonic-gate * We do this only for IRE_BROADCASTs as ip_wput_ire is currently 31067c478bd9Sstevel@tonic-gate * interested in such groupings only for broadcasts. 31077c478bd9Sstevel@tonic-gate * 31087c478bd9Sstevel@tonic-gate * NOTE : If the interfaces are brought up first and then grouped, 31097c478bd9Sstevel@tonic-gate * illgrp_insert will handle it. We come here when the interfaces 31107c478bd9Sstevel@tonic-gate * are already in group and we are bringing them UP. 31117c478bd9Sstevel@tonic-gate * 31127c478bd9Sstevel@tonic-gate * Find the first entry that matches ire_addr. *irep will be null 31137c478bd9Sstevel@tonic-gate * if no match. 311401802382Ssowmini * 311501802382Ssowmini * Note: the loopback and non-loopback broadcast entries for an 311601802382Ssowmini * interface MUST be added before any MULTIRT entries. 31177c478bd9Sstevel@tonic-gate */ 31187c478bd9Sstevel@tonic-gate irep = (ire_t **)irb_ptr; 31197c478bd9Sstevel@tonic-gate while ((ire1 = *irep) != NULL && ire->ire_addr != ire1->ire_addr) 31207c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 31217c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_BROADCAST && *irep != NULL) { 31227c478bd9Sstevel@tonic-gate /* 31237c478bd9Sstevel@tonic-gate * We found some ire (i.e *irep) with a matching addr. We 31247c478bd9Sstevel@tonic-gate * want to group ires with same addr and same ill group 31257c478bd9Sstevel@tonic-gate * together. 31267c478bd9Sstevel@tonic-gate * 31277c478bd9Sstevel@tonic-gate * First get to the entry that matches our address and 31287c478bd9Sstevel@tonic-gate * ill group i.e stop as soon as we find the first ire 31297c478bd9Sstevel@tonic-gate * matching the ill group and address. If there is only 31307c478bd9Sstevel@tonic-gate * an address match, we should walk and look for some 31317c478bd9Sstevel@tonic-gate * group match. These are some of the possible scenarios : 31327c478bd9Sstevel@tonic-gate * 31337c478bd9Sstevel@tonic-gate * 1) There are no groups at all i.e all ire's ill_group 31347c478bd9Sstevel@tonic-gate * are NULL. In that case we will essentially group 31357c478bd9Sstevel@tonic-gate * all the ires with the same addr together. Same as 31367c478bd9Sstevel@tonic-gate * the "else" block of this "if". 31377c478bd9Sstevel@tonic-gate * 31387c478bd9Sstevel@tonic-gate * 2) There are some groups and this ire's ill_group is 31397c478bd9Sstevel@tonic-gate * NULL. In this case, we will first find the group 31407c478bd9Sstevel@tonic-gate * that matches the address and a NULL group. Then 31417c478bd9Sstevel@tonic-gate * we will insert the ire at the end of that group. 31427c478bd9Sstevel@tonic-gate * 31437c478bd9Sstevel@tonic-gate * 3) There are some groups and this ires's ill_group is 31447c478bd9Sstevel@tonic-gate * non-NULL. In this case we will first find the group 31457c478bd9Sstevel@tonic-gate * that matches the address and the ill_group. Then 31467c478bd9Sstevel@tonic-gate * we will insert the ire at the end of that group. 31477c478bd9Sstevel@tonic-gate */ 314801802382Ssowmini for (;;) { 31497c478bd9Sstevel@tonic-gate ire1 = *irep; 31507c478bd9Sstevel@tonic-gate if ((ire1->ire_next == NULL) || 31517c478bd9Sstevel@tonic-gate (ire1->ire_next->ire_addr != ire->ire_addr) || 31527c478bd9Sstevel@tonic-gate (ire1->ire_type != IRE_BROADCAST) || 315301802382Ssowmini (ire1->ire_flags & RTF_MULTIRT) || 31547c478bd9Sstevel@tonic-gate (ire1->ire_ipif->ipif_ill->ill_group == 31557c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ill->ill_group)) 31567c478bd9Sstevel@tonic-gate break; 31577c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 31587c478bd9Sstevel@tonic-gate } 31597c478bd9Sstevel@tonic-gate ASSERT(*irep != NULL); 316001802382Ssowmini /* 316101802382Ssowmini * The ire will be added before *irep, so 316201802382Ssowmini * if irep is a MULTIRT ire, just break to 316301802382Ssowmini * ire insertion code. 316401802382Ssowmini */ 316501802382Ssowmini if (((*irep)->ire_flags & RTF_MULTIRT) != 0) 316601802382Ssowmini goto insert_ire; 316701802382Ssowmini 31687c478bd9Sstevel@tonic-gate irep = &((*irep)->ire_next); 31697c478bd9Sstevel@tonic-gate 31707c478bd9Sstevel@tonic-gate /* 31717c478bd9Sstevel@tonic-gate * Either we have hit the end of the list or the address 31727c478bd9Sstevel@tonic-gate * did not match or the group *matched*. If we found 31737c478bd9Sstevel@tonic-gate * a match on the group, skip to the end of the group. 31747c478bd9Sstevel@tonic-gate */ 31757c478bd9Sstevel@tonic-gate while (*irep != NULL) { 31767c478bd9Sstevel@tonic-gate ire1 = *irep; 31777c478bd9Sstevel@tonic-gate if ((ire1->ire_addr != ire->ire_addr) || 31787c478bd9Sstevel@tonic-gate (ire1->ire_type != IRE_BROADCAST) || 31797c478bd9Sstevel@tonic-gate (ire1->ire_ipif->ipif_ill->ill_group != 31807c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ill->ill_group)) 31817c478bd9Sstevel@tonic-gate break; 31827c478bd9Sstevel@tonic-gate if (ire1->ire_ipif->ipif_ill->ill_group == NULL && 31837c478bd9Sstevel@tonic-gate ire1->ire_ipif == ire->ire_ipif) { 31847c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 31857c478bd9Sstevel@tonic-gate break; 31867c478bd9Sstevel@tonic-gate } 31877c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 31887c478bd9Sstevel@tonic-gate } 31897c478bd9Sstevel@tonic-gate } else if (*irep != NULL) { 31907c478bd9Sstevel@tonic-gate /* 31917c478bd9Sstevel@tonic-gate * Find the last ire which matches ire_addr. 31927c478bd9Sstevel@tonic-gate * Needed to do tail insertion among entries with the same 31937c478bd9Sstevel@tonic-gate * ire_addr. 31947c478bd9Sstevel@tonic-gate */ 31957c478bd9Sstevel@tonic-gate while (ire->ire_addr == ire1->ire_addr) { 31967c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 31977c478bd9Sstevel@tonic-gate ire1 = *irep; 31987c478bd9Sstevel@tonic-gate if (ire1 == NULL) 31997c478bd9Sstevel@tonic-gate break; 32007c478bd9Sstevel@tonic-gate } 32017c478bd9Sstevel@tonic-gate } 32027c478bd9Sstevel@tonic-gate 320301802382Ssowmini insert_ire: 32047c478bd9Sstevel@tonic-gate /* Insert at *irep */ 32057c478bd9Sstevel@tonic-gate ire1 = *irep; 32067c478bd9Sstevel@tonic-gate if (ire1 != NULL) 32077c478bd9Sstevel@tonic-gate ire1->ire_ptpn = &ire->ire_next; 32087c478bd9Sstevel@tonic-gate ire->ire_next = ire1; 32097c478bd9Sstevel@tonic-gate /* Link the new one in. */ 32107c478bd9Sstevel@tonic-gate ire->ire_ptpn = irep; 32117c478bd9Sstevel@tonic-gate 32127c478bd9Sstevel@tonic-gate /* 32137c478bd9Sstevel@tonic-gate * ire_walk routines de-reference ire_next without holding 32147c478bd9Sstevel@tonic-gate * a lock. Before we point to the new ire, we want to make 32157c478bd9Sstevel@tonic-gate * sure the store that sets the ire_next of the new ire 32167c478bd9Sstevel@tonic-gate * reaches global visibility, so that ire_walk routines 32177c478bd9Sstevel@tonic-gate * don't see a truncated list of ires i.e if the ire_next 32187c478bd9Sstevel@tonic-gate * of the new ire gets set after we do "*irep = ire" due 32197c478bd9Sstevel@tonic-gate * to re-ordering, the ire_walk thread will see a NULL 32207c478bd9Sstevel@tonic-gate * once it accesses the ire_next of the new ire. 32217c478bd9Sstevel@tonic-gate * membar_producer() makes sure that the following store 32227c478bd9Sstevel@tonic-gate * happens *after* all of the above stores. 32237c478bd9Sstevel@tonic-gate */ 32247c478bd9Sstevel@tonic-gate membar_producer(); 32257c478bd9Sstevel@tonic-gate *irep = ire; 32267c478bd9Sstevel@tonic-gate ire->ire_bucket = irb_ptr; 32277c478bd9Sstevel@tonic-gate /* 32287c478bd9Sstevel@tonic-gate * We return a bumped up IRE above. Keep it symmetrical 32297c478bd9Sstevel@tonic-gate * so that the callers will always have to release. This 32307c478bd9Sstevel@tonic-gate * helps the callers of this function because they continue 32317c478bd9Sstevel@tonic-gate * to use the IRE after adding and hence they don't have to 32327c478bd9Sstevel@tonic-gate * lookup again after we return the IRE. 32337c478bd9Sstevel@tonic-gate * 32347c478bd9Sstevel@tonic-gate * NOTE : We don't have to use atomics as this is appearing 32357c478bd9Sstevel@tonic-gate * in the list for the first time and no one else can bump 32367c478bd9Sstevel@tonic-gate * up the reference count on this yet. 32377c478bd9Sstevel@tonic-gate */ 32387c478bd9Sstevel@tonic-gate IRE_REFHOLD_LOCKED(ire); 3239f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_inserted); 3240c793af95Ssangeeta 32417c478bd9Sstevel@tonic-gate irb_ptr->irb_ire_cnt++; 3242c793af95Ssangeeta if (irb_ptr->irb_marks & IRB_MARK_FTABLE) 3243c793af95Ssangeeta irb_ptr->irb_nire++; 3244c793af95Ssangeeta 32457c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_TEMPORARY) 32467c478bd9Sstevel@tonic-gate irb_ptr->irb_tmp_ire_cnt++; 32477c478bd9Sstevel@tonic-gate 32487c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) { 32497c478bd9Sstevel@tonic-gate ire->ire_ipif->ipif_ire_cnt++; 32507c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) { 32517c478bd9Sstevel@tonic-gate stq_ill = (ill_t *)ire->ire_stq->q_ptr; 32527c478bd9Sstevel@tonic-gate stq_ill->ill_ire_cnt++; 32537c478bd9Sstevel@tonic-gate } 32547c478bd9Sstevel@tonic-gate } else { 32557c478bd9Sstevel@tonic-gate ASSERT(ire->ire_stq == NULL); 32567c478bd9Sstevel@tonic-gate } 32577c478bd9Sstevel@tonic-gate 32587c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 3259f4b3ec61Sdh155122 mutex_exit(&ipst->ips_ndp4->ndp_g_lock); 32607c478bd9Sstevel@tonic-gate 32617c478bd9Sstevel@tonic-gate if (pire != NULL) { 32627c478bd9Sstevel@tonic-gate /* Assert that it is not removed from the list yet */ 32637c478bd9Sstevel@tonic-gate ASSERT(pire->ire_ptpn != NULL); 32647c478bd9Sstevel@tonic-gate IRB_REFRELE(pire->ire_bucket); 32657c478bd9Sstevel@tonic-gate ire_refrele(pire); 32667c478bd9Sstevel@tonic-gate } 32677c478bd9Sstevel@tonic-gate 32687c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) { 32697c478bd9Sstevel@tonic-gate /* 3270c793af95Ssangeeta * For ire's with host mask see if there is an entry 32717c478bd9Sstevel@tonic-gate * in the cache. If there is one flush the whole cache as 32727c478bd9Sstevel@tonic-gate * there might be multiple entries due to RTF_MULTIRT (CGTP). 32737c478bd9Sstevel@tonic-gate * If no entry is found than there is no need to flush the 32747c478bd9Sstevel@tonic-gate * cache. 32757c478bd9Sstevel@tonic-gate */ 32767c478bd9Sstevel@tonic-gate if (ire->ire_mask == IP_HOST_MASK) { 32777c478bd9Sstevel@tonic-gate ire_t *lire; 32787c478bd9Sstevel@tonic-gate lire = ire_ctable_lookup(ire->ire_addr, NULL, IRE_CACHE, 3279f4b3ec61Sdh155122 NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE, ipst); 32807c478bd9Sstevel@tonic-gate if (lire != NULL) { 32817c478bd9Sstevel@tonic-gate ire_refrele(lire); 32827c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire, IRE_FLUSH_ADD); 32837c478bd9Sstevel@tonic-gate } 32847c478bd9Sstevel@tonic-gate } else { 32857c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire, IRE_FLUSH_ADD); 32867c478bd9Sstevel@tonic-gate } 32877c478bd9Sstevel@tonic-gate } 32887c478bd9Sstevel@tonic-gate /* 32897c478bd9Sstevel@tonic-gate * We had to delay the fast path probe until the ire is inserted 32907c478bd9Sstevel@tonic-gate * in the list. Otherwise the fast path ack won't find the ire in 32917c478bd9Sstevel@tonic-gate * the table. 32927c478bd9Sstevel@tonic-gate */ 3293516bda92Ssowmini if (ire->ire_type == IRE_CACHE || 3294516bda92Ssowmini (ire->ire_type == IRE_BROADCAST && ire->ire_stq != NULL)) { 3295516bda92Ssowmini ASSERT(ire->ire_nce != NULL); 329654da8755Ssowmini if (ire->ire_nce->nce_state == ND_REACHABLE) 3297516bda92Ssowmini nce_fastpath(ire->ire_nce); 3298516bda92Ssowmini } 32997c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL) 33007c478bd9Sstevel@tonic-gate ASSERT(!MUTEX_HELD(&ire->ire_ipif->ipif_ill->ill_lock)); 33017c478bd9Sstevel@tonic-gate *ire_p = ire; 3302c793af95Ssangeeta if (need_refrele) { 3303c793af95Ssangeeta IRB_REFRELE(irb_ptr); 3304c793af95Ssangeeta } 33057c478bd9Sstevel@tonic-gate return (0); 33067c478bd9Sstevel@tonic-gate } 33077c478bd9Sstevel@tonic-gate 33087c478bd9Sstevel@tonic-gate /* 33097c478bd9Sstevel@tonic-gate * IRB_REFRELE is the only caller of the function. ire_unlink calls to 33107c478bd9Sstevel@tonic-gate * do the final cleanup for this ire. 33117c478bd9Sstevel@tonic-gate */ 33127c478bd9Sstevel@tonic-gate void 33137c478bd9Sstevel@tonic-gate ire_cleanup(ire_t *ire) 33147c478bd9Sstevel@tonic-gate { 33157c478bd9Sstevel@tonic-gate ire_t *ire_next; 3316f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 33177c478bd9Sstevel@tonic-gate 33187c478bd9Sstevel@tonic-gate ASSERT(ire != NULL); 33197c478bd9Sstevel@tonic-gate 33207c478bd9Sstevel@tonic-gate while (ire != NULL) { 33217c478bd9Sstevel@tonic-gate ire_next = ire->ire_next; 33227c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 33237c478bd9Sstevel@tonic-gate ire_delete_v4(ire); 3324f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, 3325f4b3ec61Sdh155122 ire_stats_deleted); 33267c478bd9Sstevel@tonic-gate } else { 33277c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV6_VERSION); 33287c478bd9Sstevel@tonic-gate ire_delete_v6(ire); 3329f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v6, 3330f4b3ec61Sdh155122 ire_stats_deleted); 33317c478bd9Sstevel@tonic-gate } 33327c478bd9Sstevel@tonic-gate /* 33337c478bd9Sstevel@tonic-gate * Now it's really out of the list. Before doing the 33347c478bd9Sstevel@tonic-gate * REFRELE, set ire_next to NULL as ire_inactive asserts 33357c478bd9Sstevel@tonic-gate * so. 33367c478bd9Sstevel@tonic-gate */ 33377c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 33387c478bd9Sstevel@tonic-gate IRE_REFRELE_NOTR(ire); 33397c478bd9Sstevel@tonic-gate ire = ire_next; 33407c478bd9Sstevel@tonic-gate } 33417c478bd9Sstevel@tonic-gate } 33427c478bd9Sstevel@tonic-gate 33437c478bd9Sstevel@tonic-gate /* 33447c478bd9Sstevel@tonic-gate * IRB_REFRELE is the only caller of the function. It calls to unlink 33457c478bd9Sstevel@tonic-gate * all the CONDEMNED ires from this bucket. 33467c478bd9Sstevel@tonic-gate */ 33477c478bd9Sstevel@tonic-gate ire_t * 33487c478bd9Sstevel@tonic-gate ire_unlink(irb_t *irb) 33497c478bd9Sstevel@tonic-gate { 33507c478bd9Sstevel@tonic-gate ire_t *ire; 33517c478bd9Sstevel@tonic-gate ire_t *ire1; 33527c478bd9Sstevel@tonic-gate ire_t **ptpn; 33537c478bd9Sstevel@tonic-gate ire_t *ire_list = NULL; 33547c478bd9Sstevel@tonic-gate 33557c478bd9Sstevel@tonic-gate ASSERT(RW_WRITE_HELD(&irb->irb_lock)); 3356c793af95Ssangeeta ASSERT(((irb->irb_marks & IRB_MARK_FTABLE) && irb->irb_refcnt == 1) || 3357c793af95Ssangeeta (irb->irb_refcnt == 0)); 3358c793af95Ssangeeta ASSERT(irb->irb_marks & IRB_MARK_CONDEMNED); 33597c478bd9Sstevel@tonic-gate ASSERT(irb->irb_ire != NULL); 33607c478bd9Sstevel@tonic-gate 33617c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; ire = ire1) { 3362f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 3363f4b3ec61Sdh155122 33647c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 33657c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_CONDEMNED) { 33667c478bd9Sstevel@tonic-gate ptpn = ire->ire_ptpn; 33677c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 33687c478bd9Sstevel@tonic-gate if (ire1) 33697c478bd9Sstevel@tonic-gate ire1->ire_ptpn = ptpn; 33707c478bd9Sstevel@tonic-gate *ptpn = ire1; 33717c478bd9Sstevel@tonic-gate ire->ire_ptpn = NULL; 33727c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 33737c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT) { 33747c478bd9Sstevel@tonic-gate /* 33757c478bd9Sstevel@tonic-gate * IRE is out of the list. We need to adjust 33767c478bd9Sstevel@tonic-gate * the accounting before the caller drops 33777c478bd9Sstevel@tonic-gate * the lock. 33787c478bd9Sstevel@tonic-gate */ 33797c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 3380f4b3ec61Sdh155122 ASSERT(ipst-> 3381f4b3ec61Sdh155122 ips_ipv6_ire_default_count != 3382f4b3ec61Sdh155122 0); 3383f4b3ec61Sdh155122 ipst->ips_ipv6_ire_default_count--; 33847c478bd9Sstevel@tonic-gate } 33857c478bd9Sstevel@tonic-gate } 33867c478bd9Sstevel@tonic-gate /* 33877c478bd9Sstevel@tonic-gate * We need to call ire_delete_v4 or ire_delete_v6 33887c478bd9Sstevel@tonic-gate * to clean up the cache or the redirects pointing at 33897c478bd9Sstevel@tonic-gate * the default gateway. We need to drop the lock 33907c478bd9Sstevel@tonic-gate * as ire_flush_cache/ire_delete_host_redircts require 33917c478bd9Sstevel@tonic-gate * so. But we can't drop the lock, as ire_unlink needs 33927c478bd9Sstevel@tonic-gate * to atomically remove the ires from the list. 33937c478bd9Sstevel@tonic-gate * So, create a temporary list of CONDEMNED ires 33947c478bd9Sstevel@tonic-gate * for doing ire_delete_v4/ire_delete_v6 operations 33957c478bd9Sstevel@tonic-gate * later on. 33967c478bd9Sstevel@tonic-gate */ 33977c478bd9Sstevel@tonic-gate ire->ire_next = ire_list; 33987c478bd9Sstevel@tonic-gate ire_list = ire; 33997c478bd9Sstevel@tonic-gate } 34007c478bd9Sstevel@tonic-gate } 3401c793af95Ssangeeta irb->irb_marks &= ~IRB_MARK_CONDEMNED; 34027c478bd9Sstevel@tonic-gate return (ire_list); 34037c478bd9Sstevel@tonic-gate } 34047c478bd9Sstevel@tonic-gate 34057c478bd9Sstevel@tonic-gate /* 34067c478bd9Sstevel@tonic-gate * Delete all the cache entries with this 'addr'. When IP gets a gratuitous 3407c793af95Ssangeeta * ARP message on any of its interface queue, it scans the nce table and 3408c793af95Ssangeeta * deletes and calls ndp_delete() for the appropriate nce. This action 3409c793af95Ssangeeta * also deletes all the neighbor/ire cache entries for that address. 3410c793af95Ssangeeta * This function is called from ip_arp_news in ip.c and also for 3411c793af95Ssangeeta * ARP ioctl processing in ip_if.c. ip_ire_clookup_and_delete returns 3412c793af95Ssangeeta * true if it finds a nce entry which is used by ip_arp_news to determine if 3413c793af95Ssangeeta * it needs to do an ire_walk_v4. The return value is also used for the 3414c793af95Ssangeeta * same purpose by ARP IOCTL processing * in ip_if.c when deleting 3415c793af95Ssangeeta * ARP entries. For SIOC*IFARP ioctls in addition to the address, 3416c793af95Ssangeeta * ip_if->ipif_ill also needs to be matched. 34177c478bd9Sstevel@tonic-gate */ 34187c478bd9Sstevel@tonic-gate boolean_t 3419f4b3ec61Sdh155122 ip_ire_clookup_and_delete(ipaddr_t addr, ipif_t *ipif, ip_stack_t *ipst) 34207c478bd9Sstevel@tonic-gate { 34217c478bd9Sstevel@tonic-gate ill_t *ill; 3422c793af95Ssangeeta nce_t *nce; 34237c478bd9Sstevel@tonic-gate 3424c793af95Ssangeeta ill = (ipif ? ipif->ipif_ill : NULL); 34257c478bd9Sstevel@tonic-gate 3426c793af95Ssangeeta if (ill != NULL) { 3427c793af95Ssangeeta /* 3428c793af95Ssangeeta * clean up the nce (and any relevant ire's) that matches 3429c793af95Ssangeeta * on addr and ill. 3430c793af95Ssangeeta */ 3431c793af95Ssangeeta nce = ndp_lookup_v4(ill, &addr, B_FALSE); 3432c793af95Ssangeeta if (nce != NULL) { 3433c793af95Ssangeeta ndp_delete(nce); 3434c793af95Ssangeeta return (B_TRUE); 34357c478bd9Sstevel@tonic-gate } 3436c793af95Ssangeeta } else { 3437c793af95Ssangeeta /* 3438c793af95Ssangeeta * ill is wildcard. clean up all nce's and 3439c793af95Ssangeeta * ire's that match on addr 3440c793af95Ssangeeta */ 3441c793af95Ssangeeta nce_clookup_t cl; 34427c478bd9Sstevel@tonic-gate 3443c793af95Ssangeeta cl.ncecl_addr = addr; 3444c793af95Ssangeeta cl.ncecl_found = B_FALSE; 34457c478bd9Sstevel@tonic-gate 3446f4b3ec61Sdh155122 ndp_walk_common(ipst->ips_ndp4, NULL, 3447c793af95Ssangeeta (pfi_t)ip_nce_clookup_and_delete, (uchar_t *)&cl, B_TRUE); 3448c793af95Ssangeeta 3449c793af95Ssangeeta /* 3450c793af95Ssangeeta * ncecl_found would be set by ip_nce_clookup_and_delete if 3451c793af95Ssangeeta * we found a matching nce. 3452c793af95Ssangeeta */ 3453c793af95Ssangeeta return (cl.ncecl_found); 3454c793af95Ssangeeta } 3455c793af95Ssangeeta return (B_FALSE); 3456c793af95Ssangeeta 3457c793af95Ssangeeta } 3458c793af95Ssangeeta 3459c793af95Ssangeeta /* Delete the supplied nce if its nce_addr matches the supplied address */ 3460c793af95Ssangeeta static void 3461c793af95Ssangeeta ip_nce_clookup_and_delete(nce_t *nce, void *arg) 3462c793af95Ssangeeta { 3463c793af95Ssangeeta nce_clookup_t *cl = (nce_clookup_t *)arg; 3464c793af95Ssangeeta ipaddr_t nce_addr; 3465c793af95Ssangeeta 3466c793af95Ssangeeta IN6_V4MAPPED_TO_IPADDR(&nce->nce_addr, nce_addr); 3467c793af95Ssangeeta if (nce_addr == cl->ncecl_addr) { 3468c793af95Ssangeeta cl->ncecl_found = B_TRUE; 3469c793af95Ssangeeta /* clean up the nce (and any relevant ire's) */ 3470c793af95Ssangeeta ndp_delete(nce); 3471c793af95Ssangeeta } 3472c793af95Ssangeeta } 3473c793af95Ssangeeta 3474c793af95Ssangeeta /* 3475c793af95Ssangeeta * Clean up the radix node for this ire. Must be called by IRB_REFRELE 3476c793af95Ssangeeta * when there are no ire's left in the bucket. Returns TRUE if the bucket 3477c793af95Ssangeeta * is deleted and freed. 3478c793af95Ssangeeta */ 3479c793af95Ssangeeta boolean_t 3480c793af95Ssangeeta irb_inactive(irb_t *irb) 3481c793af95Ssangeeta { 3482c793af95Ssangeeta struct rt_entry *rt; 3483c793af95Ssangeeta struct radix_node *rn; 3484f4b3ec61Sdh155122 ip_stack_t *ipst = irb->irb_ipst; 3485f4b3ec61Sdh155122 3486f4b3ec61Sdh155122 ASSERT(irb->irb_ipst != NULL); 3487c793af95Ssangeeta 3488c793af95Ssangeeta rt = IRB2RT(irb); 3489c793af95Ssangeeta rn = (struct radix_node *)rt; 3490c793af95Ssangeeta 3491c793af95Ssangeeta /* first remove it from the radix tree. */ 3492f4b3ec61Sdh155122 RADIX_NODE_HEAD_WLOCK(ipst->ips_ip_ftable); 3493c793af95Ssangeeta rw_enter(&irb->irb_lock, RW_WRITER); 3494c793af95Ssangeeta if (irb->irb_refcnt == 1 && irb->irb_nire == 0) { 3495f4b3ec61Sdh155122 rn = ipst->ips_ip_ftable->rnh_deladdr(rn->rn_key, rn->rn_mask, 3496f4b3ec61Sdh155122 ipst->ips_ip_ftable); 3497c793af95Ssangeeta DTRACE_PROBE1(irb__free, rt_t *, rt); 3498c793af95Ssangeeta ASSERT((void *)rn == (void *)rt); 3499c793af95Ssangeeta Free(rt, rt_entry_cache); 3500c793af95Ssangeeta /* irb_lock is freed */ 3501f4b3ec61Sdh155122 RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 3502c793af95Ssangeeta return (B_TRUE); 3503c793af95Ssangeeta } 3504c793af95Ssangeeta rw_exit(&irb->irb_lock); 3505f4b3ec61Sdh155122 RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 3506c793af95Ssangeeta return (B_FALSE); 35077c478bd9Sstevel@tonic-gate } 35087c478bd9Sstevel@tonic-gate 35097c478bd9Sstevel@tonic-gate /* 35107c478bd9Sstevel@tonic-gate * Delete the specified IRE. 35117c478bd9Sstevel@tonic-gate */ 35127c478bd9Sstevel@tonic-gate void 35137c478bd9Sstevel@tonic-gate ire_delete(ire_t *ire) 35147c478bd9Sstevel@tonic-gate { 35157c478bd9Sstevel@tonic-gate ire_t *ire1; 35167c478bd9Sstevel@tonic-gate ire_t **ptpn; 35177c478bd9Sstevel@tonic-gate irb_t *irb; 3518f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 35197c478bd9Sstevel@tonic-gate 3520c793af95Ssangeeta if ((irb = ire->ire_bucket) == NULL) { 35217c478bd9Sstevel@tonic-gate /* 35227c478bd9Sstevel@tonic-gate * It was never inserted in the list. Should call REFRELE 35237c478bd9Sstevel@tonic-gate * to free this IRE. 35247c478bd9Sstevel@tonic-gate */ 35257c478bd9Sstevel@tonic-gate IRE_REFRELE_NOTR(ire); 35267c478bd9Sstevel@tonic-gate return; 35277c478bd9Sstevel@tonic-gate } 35287c478bd9Sstevel@tonic-gate 35297c478bd9Sstevel@tonic-gate rw_enter(&irb->irb_lock, RW_WRITER); 35307c478bd9Sstevel@tonic-gate 3531c793af95Ssangeeta if (irb->irb_rr_origin == ire) { 3532c793af95Ssangeeta irb->irb_rr_origin = NULL; 3533c793af95Ssangeeta } 3534c793af95Ssangeeta 35357c478bd9Sstevel@tonic-gate /* 35367c478bd9Sstevel@tonic-gate * In case of V4 we might still be waiting for fastpath ack. 35377c478bd9Sstevel@tonic-gate */ 3538516bda92Ssowmini if (ire->ire_ipversion == IPV4_VERSION && 3539516bda92Ssowmini (ire->ire_type == IRE_CACHE || 3540516bda92Ssowmini (ire->ire_type == IRE_BROADCAST && ire->ire_stq != NULL))) { 3541516bda92Ssowmini ASSERT(ire->ire_nce != NULL); 3542516bda92Ssowmini nce_fastpath_list_delete(ire->ire_nce); 35437c478bd9Sstevel@tonic-gate } 35447c478bd9Sstevel@tonic-gate 35457c478bd9Sstevel@tonic-gate if (ire->ire_ptpn == NULL) { 35467c478bd9Sstevel@tonic-gate /* 35477c478bd9Sstevel@tonic-gate * Some other thread has removed us from the list. 35487c478bd9Sstevel@tonic-gate * It should have done the REFRELE for us. 35497c478bd9Sstevel@tonic-gate */ 35507c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 35517c478bd9Sstevel@tonic-gate return; 35527c478bd9Sstevel@tonic-gate } 35537c478bd9Sstevel@tonic-gate 35547c478bd9Sstevel@tonic-gate if (irb->irb_refcnt != 0) { 35557c478bd9Sstevel@tonic-gate /* 35567c478bd9Sstevel@tonic-gate * The last thread to leave this bucket will 35577c478bd9Sstevel@tonic-gate * delete this ire. 35587c478bd9Sstevel@tonic-gate */ 35597c478bd9Sstevel@tonic-gate if (!(ire->ire_marks & IRE_MARK_CONDEMNED)) { 35607c478bd9Sstevel@tonic-gate irb->irb_ire_cnt--; 35617c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_TEMPORARY) 35627c478bd9Sstevel@tonic-gate irb->irb_tmp_ire_cnt--; 35637c478bd9Sstevel@tonic-gate ire->ire_marks |= IRE_MARK_CONDEMNED; 35647c478bd9Sstevel@tonic-gate } 3565c793af95Ssangeeta irb->irb_marks |= IRB_MARK_CONDEMNED; 35667c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 35677c478bd9Sstevel@tonic-gate return; 35687c478bd9Sstevel@tonic-gate } 35697c478bd9Sstevel@tonic-gate 35707c478bd9Sstevel@tonic-gate /* 35717c478bd9Sstevel@tonic-gate * Normally to delete an ire, we walk the bucket. While we 35727c478bd9Sstevel@tonic-gate * walk the bucket, we normally bump up irb_refcnt and hence 35737c478bd9Sstevel@tonic-gate * we return from above where we mark CONDEMNED and the ire 35747c478bd9Sstevel@tonic-gate * gets deleted from ire_unlink. This case is where somebody 35757c478bd9Sstevel@tonic-gate * knows the ire e.g by doing a lookup, and wants to delete the 35767c478bd9Sstevel@tonic-gate * IRE. irb_refcnt would be 0 in this case if nobody is walking 35777c478bd9Sstevel@tonic-gate * the bucket. 35787c478bd9Sstevel@tonic-gate */ 35797c478bd9Sstevel@tonic-gate ptpn = ire->ire_ptpn; 35807c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 35817c478bd9Sstevel@tonic-gate if (ire1 != NULL) 35827c478bd9Sstevel@tonic-gate ire1->ire_ptpn = ptpn; 35837c478bd9Sstevel@tonic-gate ASSERT(ptpn != NULL); 35847c478bd9Sstevel@tonic-gate *ptpn = ire1; 35857c478bd9Sstevel@tonic-gate ire->ire_ptpn = NULL; 35867c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 35877c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 3588f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v6, ire_stats_deleted); 35897c478bd9Sstevel@tonic-gate } else { 3590f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_deleted); 35917c478bd9Sstevel@tonic-gate } 35927c478bd9Sstevel@tonic-gate /* 35937c478bd9Sstevel@tonic-gate * ip_wput/ip_wput_v6 checks this flag to see whether 35947c478bd9Sstevel@tonic-gate * it should still use the cached ire or not. 35957c478bd9Sstevel@tonic-gate */ 35967c478bd9Sstevel@tonic-gate ire->ire_marks |= IRE_MARK_CONDEMNED; 35977c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT) { 35987c478bd9Sstevel@tonic-gate /* 35997c478bd9Sstevel@tonic-gate * IRE is out of the list. We need to adjust the 36007c478bd9Sstevel@tonic-gate * accounting before we drop the lock. 36017c478bd9Sstevel@tonic-gate */ 36027c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 3603f4b3ec61Sdh155122 ASSERT(ipst->ips_ipv6_ire_default_count != 0); 3604f4b3ec61Sdh155122 ipst->ips_ipv6_ire_default_count--; 36057c478bd9Sstevel@tonic-gate } 36067c478bd9Sstevel@tonic-gate } 36077c478bd9Sstevel@tonic-gate irb->irb_ire_cnt--; 3608c793af95Ssangeeta 36097c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_TEMPORARY) 36107c478bd9Sstevel@tonic-gate irb->irb_tmp_ire_cnt--; 36117c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 36127c478bd9Sstevel@tonic-gate 36137c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 36147c478bd9Sstevel@tonic-gate ire_delete_v6(ire); 36157c478bd9Sstevel@tonic-gate } else { 36167c478bd9Sstevel@tonic-gate ire_delete_v4(ire); 36177c478bd9Sstevel@tonic-gate } 36187c478bd9Sstevel@tonic-gate /* 36197c478bd9Sstevel@tonic-gate * We removed it from the list. Decrement the 36207c478bd9Sstevel@tonic-gate * reference count. 36217c478bd9Sstevel@tonic-gate */ 36227c478bd9Sstevel@tonic-gate IRE_REFRELE_NOTR(ire); 36237c478bd9Sstevel@tonic-gate } 36247c478bd9Sstevel@tonic-gate 36257c478bd9Sstevel@tonic-gate /* 36267c478bd9Sstevel@tonic-gate * Delete the specified IRE. 36277c478bd9Sstevel@tonic-gate * All calls should use ire_delete(). 36287c478bd9Sstevel@tonic-gate * Sometimes called as writer though not required by this function. 36297c478bd9Sstevel@tonic-gate * 36307c478bd9Sstevel@tonic-gate * NOTE : This function is called only if the ire was added 36317c478bd9Sstevel@tonic-gate * in the list. 36327c478bd9Sstevel@tonic-gate */ 36337c478bd9Sstevel@tonic-gate static void 36347c478bd9Sstevel@tonic-gate ire_delete_v4(ire_t *ire) 36357c478bd9Sstevel@tonic-gate { 3636f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 3637f4b3ec61Sdh155122 36387c478bd9Sstevel@tonic-gate ASSERT(ire->ire_refcnt >= 1); 36397c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 36407c478bd9Sstevel@tonic-gate 36417c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) 36427c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire, IRE_FLUSH_DELETE); 36437c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT) { 36447c478bd9Sstevel@tonic-gate /* 36457c478bd9Sstevel@tonic-gate * when a default gateway is going away 36467c478bd9Sstevel@tonic-gate * delete all the host redirects pointing at that 36477c478bd9Sstevel@tonic-gate * gateway. 36487c478bd9Sstevel@tonic-gate */ 3649f4b3ec61Sdh155122 ire_delete_host_redirects(ire->ire_gateway_addr, ipst); 36507c478bd9Sstevel@tonic-gate } 36517c478bd9Sstevel@tonic-gate } 36527c478bd9Sstevel@tonic-gate 36537c478bd9Sstevel@tonic-gate /* 36547c478bd9Sstevel@tonic-gate * IRE_REFRELE/ire_refrele are the only caller of the function. It calls 36557c478bd9Sstevel@tonic-gate * to free the ire when the reference count goes to zero. 36567c478bd9Sstevel@tonic-gate */ 36577c478bd9Sstevel@tonic-gate void 36587c478bd9Sstevel@tonic-gate ire_inactive(ire_t *ire) 36597c478bd9Sstevel@tonic-gate { 36607c478bd9Sstevel@tonic-gate nce_t *nce; 36617c478bd9Sstevel@tonic-gate ill_t *ill = NULL; 36627c478bd9Sstevel@tonic-gate ill_t *stq_ill = NULL; 36637c478bd9Sstevel@tonic-gate ipif_t *ipif; 36647c478bd9Sstevel@tonic-gate boolean_t need_wakeup = B_FALSE; 3665c793af95Ssangeeta irb_t *irb; 3666f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 36677c478bd9Sstevel@tonic-gate 36687c478bd9Sstevel@tonic-gate ASSERT(ire->ire_refcnt == 0); 36697c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ptpn == NULL); 36707c478bd9Sstevel@tonic-gate ASSERT(ire->ire_next == NULL); 36717c478bd9Sstevel@tonic-gate 3672c793af95Ssangeeta if (ire->ire_gw_secattr != NULL) { 3673c793af95Ssangeeta ire_gw_secattr_free(ire->ire_gw_secattr); 3674c793af95Ssangeeta ire->ire_gw_secattr = NULL; 3675c793af95Ssangeeta } 3676c793af95Ssangeeta 3677c793af95Ssangeeta if (ire->ire_mp != NULL) { 3678c793af95Ssangeeta ASSERT(ire->ire_bucket == NULL); 3679c793af95Ssangeeta mutex_destroy(&ire->ire_lock); 3680f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_freed); 3681c793af95Ssangeeta if (ire->ire_nce != NULL) 3682c793af95Ssangeeta NCE_REFRELE_NOTR(ire->ire_nce); 3683c793af95Ssangeeta freeb(ire->ire_mp); 3684c793af95Ssangeeta return; 3685c793af95Ssangeeta } 3686c793af95Ssangeeta 36877c478bd9Sstevel@tonic-gate if ((nce = ire->ire_nce) != NULL) { 36887c478bd9Sstevel@tonic-gate NCE_REFRELE_NOTR(nce); 36897c478bd9Sstevel@tonic-gate ire->ire_nce = NULL; 36907c478bd9Sstevel@tonic-gate } 3691c793af95Ssangeeta 36927c478bd9Sstevel@tonic-gate if (ire->ire_ipif == NULL) 36937c478bd9Sstevel@tonic-gate goto end; 36947c478bd9Sstevel@tonic-gate 36957c478bd9Sstevel@tonic-gate ipif = ire->ire_ipif; 36967c478bd9Sstevel@tonic-gate ill = ipif->ipif_ill; 36977c478bd9Sstevel@tonic-gate 36987c478bd9Sstevel@tonic-gate if (ire->ire_bucket == NULL) { 36997c478bd9Sstevel@tonic-gate /* The ire was never inserted in the table. */ 37007c478bd9Sstevel@tonic-gate goto end; 37017c478bd9Sstevel@tonic-gate } 37027c478bd9Sstevel@tonic-gate 37037c478bd9Sstevel@tonic-gate /* 37047c478bd9Sstevel@tonic-gate * ipif_ire_cnt on this ipif goes down by 1. If the ire_stq is 37055c0b7edeSseb * non-null ill_ire_count also goes down by 1. 37067c478bd9Sstevel@tonic-gate * 37077c478bd9Sstevel@tonic-gate * The ipif that is associated with an ire is ire->ire_ipif and 37087c478bd9Sstevel@tonic-gate * hence when the ire->ire_ipif->ipif_ire_cnt drops to zero we call 37097c478bd9Sstevel@tonic-gate * ipif_ill_refrele_tail. Usually stq_ill is null or the same as 37107c478bd9Sstevel@tonic-gate * ire->ire_ipif->ipif_ill. So nothing more needs to be done. Only 37117c478bd9Sstevel@tonic-gate * in the case of IRE_CACHES when IPMP is used, stq_ill can be 37127c478bd9Sstevel@tonic-gate * different. If this is different from ire->ire_ipif->ipif_ill and 37137c478bd9Sstevel@tonic-gate * if the ill_ire_cnt on the stq_ill also has dropped to zero, we call 37145c0b7edeSseb * ipif_ill_refrele_tail on the stq_ill. 37157c478bd9Sstevel@tonic-gate */ 37167c478bd9Sstevel@tonic-gate 37177c478bd9Sstevel@tonic-gate if (ire->ire_stq != NULL) 37187c478bd9Sstevel@tonic-gate stq_ill = (ill_t *)ire->ire_stq->q_ptr; 37197c478bd9Sstevel@tonic-gate 37205c0b7edeSseb if (stq_ill == NULL || stq_ill == ill) { 37217c478bd9Sstevel@tonic-gate /* Optimize the most common case */ 37227c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 37237c478bd9Sstevel@tonic-gate ASSERT(ipif->ipif_ire_cnt != 0); 37247c478bd9Sstevel@tonic-gate ipif->ipif_ire_cnt--; 37257c478bd9Sstevel@tonic-gate if (ipif->ipif_ire_cnt == 0) 37267c478bd9Sstevel@tonic-gate need_wakeup = B_TRUE; 37277c478bd9Sstevel@tonic-gate if (stq_ill != NULL) { 37287c478bd9Sstevel@tonic-gate ASSERT(stq_ill->ill_ire_cnt != 0); 37297c478bd9Sstevel@tonic-gate stq_ill->ill_ire_cnt--; 37307c478bd9Sstevel@tonic-gate if (stq_ill->ill_ire_cnt == 0) 37317c478bd9Sstevel@tonic-gate need_wakeup = B_TRUE; 37327c478bd9Sstevel@tonic-gate } 37337c478bd9Sstevel@tonic-gate if (need_wakeup) { 37347c478bd9Sstevel@tonic-gate /* Drops the ill lock */ 37357c478bd9Sstevel@tonic-gate ipif_ill_refrele_tail(ill); 37367c478bd9Sstevel@tonic-gate } else { 37377c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 37387c478bd9Sstevel@tonic-gate } 37397c478bd9Sstevel@tonic-gate } else { 37407c478bd9Sstevel@tonic-gate /* 37417c478bd9Sstevel@tonic-gate * We can't grab all the ill locks at the same time. 37427c478bd9Sstevel@tonic-gate * It can lead to recursive lock enter in the call to 37437c478bd9Sstevel@tonic-gate * ipif_ill_refrele_tail and later. Instead do it 1 at 37447c478bd9Sstevel@tonic-gate * a time. 37457c478bd9Sstevel@tonic-gate */ 37467c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 37477c478bd9Sstevel@tonic-gate ASSERT(ipif->ipif_ire_cnt != 0); 37487c478bd9Sstevel@tonic-gate ipif->ipif_ire_cnt--; 37497c478bd9Sstevel@tonic-gate if (ipif->ipif_ire_cnt == 0) { 37507c478bd9Sstevel@tonic-gate /* Drops the lock */ 37517c478bd9Sstevel@tonic-gate ipif_ill_refrele_tail(ill); 37527c478bd9Sstevel@tonic-gate } else { 37537c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 37547c478bd9Sstevel@tonic-gate } 37557c478bd9Sstevel@tonic-gate if (stq_ill != NULL) { 37567c478bd9Sstevel@tonic-gate mutex_enter(&stq_ill->ill_lock); 37577c478bd9Sstevel@tonic-gate ASSERT(stq_ill->ill_ire_cnt != 0); 37587c478bd9Sstevel@tonic-gate stq_ill->ill_ire_cnt--; 37597c478bd9Sstevel@tonic-gate if (stq_ill->ill_ire_cnt == 0) { 37607c478bd9Sstevel@tonic-gate /* Drops the ill lock */ 37617c478bd9Sstevel@tonic-gate ipif_ill_refrele_tail(stq_ill); 37627c478bd9Sstevel@tonic-gate } else { 37637c478bd9Sstevel@tonic-gate mutex_exit(&stq_ill->ill_lock); 37647c478bd9Sstevel@tonic-gate } 37657c478bd9Sstevel@tonic-gate } 37667c478bd9Sstevel@tonic-gate } 37677c478bd9Sstevel@tonic-gate end: 37687c478bd9Sstevel@tonic-gate /* This should be true for both V4 and V6 */ 37697c478bd9Sstevel@tonic-gate 3770c793af95Ssangeeta if ((ire->ire_type & IRE_FORWARDTABLE) && 3771c793af95Ssangeeta (ire->ire_ipversion == IPV4_VERSION) && 3772c793af95Ssangeeta ((irb = ire->ire_bucket) != NULL)) { 3773c793af95Ssangeeta rw_enter(&irb->irb_lock, RW_WRITER); 3774c793af95Ssangeeta irb->irb_nire--; 3775c793af95Ssangeeta /* 3776c793af95Ssangeeta * Instead of examining the conditions for freeing 3777c793af95Ssangeeta * the radix node here, we do it by calling 3778c793af95Ssangeeta * IRB_REFRELE which is a single point in the code 3779c793af95Ssangeeta * that embeds that logic. Bump up the refcnt to 3780c793af95Ssangeeta * be able to call IRB_REFRELE 3781c793af95Ssangeeta */ 3782c793af95Ssangeeta IRB_REFHOLD_LOCKED(irb); 3783c793af95Ssangeeta rw_exit(&irb->irb_lock); 3784c793af95Ssangeeta IRB_REFRELE(irb); 3785c793af95Ssangeeta } 37867c478bd9Sstevel@tonic-gate ire->ire_ipif = NULL; 37877c478bd9Sstevel@tonic-gate 3788*6a8288c7Scarlsonj #ifdef DEBUG 3789*6a8288c7Scarlsonj ire_trace_cleanup(ire); 37907c478bd9Sstevel@tonic-gate #endif 37917c478bd9Sstevel@tonic-gate mutex_destroy(&ire->ire_lock); 37927c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 3793f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v6, ire_stats_freed); 37947c478bd9Sstevel@tonic-gate } else { 3795f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_freed); 37967c478bd9Sstevel@tonic-gate } 3797c793af95Ssangeeta ASSERT(ire->ire_mp == NULL); 37987c478bd9Sstevel@tonic-gate /* Has been allocated out of the cache */ 37997c478bd9Sstevel@tonic-gate kmem_cache_free(ire_cache, ire); 38007c478bd9Sstevel@tonic-gate } 38017c478bd9Sstevel@tonic-gate 38027c478bd9Sstevel@tonic-gate /* 38036bdb8e66Sdd193516 * ire_walk routine to delete all IRE_CACHE/IRE_HOST types redirect 38046bdb8e66Sdd193516 * entries that have a given gateway address. 38057c478bd9Sstevel@tonic-gate */ 38067c478bd9Sstevel@tonic-gate void 38077c478bd9Sstevel@tonic-gate ire_delete_cache_gw(ire_t *ire, char *cp) 38087c478bd9Sstevel@tonic-gate { 38097c478bd9Sstevel@tonic-gate ipaddr_t gw_addr; 38107c478bd9Sstevel@tonic-gate 38116bdb8e66Sdd193516 if (!(ire->ire_type & IRE_CACHE) && 38126bdb8e66Sdd193516 !(ire->ire_flags & RTF_DYNAMIC)) 38137c478bd9Sstevel@tonic-gate return; 38147c478bd9Sstevel@tonic-gate 38157c478bd9Sstevel@tonic-gate bcopy(cp, &gw_addr, sizeof (gw_addr)); 38167c478bd9Sstevel@tonic-gate if (ire->ire_gateway_addr == gw_addr) { 38177c478bd9Sstevel@tonic-gate ip1dbg(("ire_delete_cache_gw: deleted 0x%x type %d to 0x%x\n", 38187c478bd9Sstevel@tonic-gate (int)ntohl(ire->ire_addr), ire->ire_type, 38197c478bd9Sstevel@tonic-gate (int)ntohl(ire->ire_gateway_addr))); 38207c478bd9Sstevel@tonic-gate ire_delete(ire); 38217c478bd9Sstevel@tonic-gate } 38227c478bd9Sstevel@tonic-gate } 38237c478bd9Sstevel@tonic-gate 38247c478bd9Sstevel@tonic-gate /* 38257c478bd9Sstevel@tonic-gate * Remove all IRE_CACHE entries that match the ire specified. 38267c478bd9Sstevel@tonic-gate * 38277c478bd9Sstevel@tonic-gate * The flag argument indicates if the flush request is due to addition 38287c478bd9Sstevel@tonic-gate * of new route (IRE_FLUSH_ADD) or deletion of old route (IRE_FLUSH_DELETE). 38297c478bd9Sstevel@tonic-gate * 38307c478bd9Sstevel@tonic-gate * This routine takes only the IREs from the forwarding table and flushes 38317c478bd9Sstevel@tonic-gate * the corresponding entries from the cache table. 38327c478bd9Sstevel@tonic-gate * 38337c478bd9Sstevel@tonic-gate * When flushing due to the deletion of an old route, it 38347c478bd9Sstevel@tonic-gate * just checks the cache handles (ire_phandle and ire_ihandle) and 38357c478bd9Sstevel@tonic-gate * deletes the ones that match. 38367c478bd9Sstevel@tonic-gate * 38377c478bd9Sstevel@tonic-gate * When flushing due to the creation of a new route, it checks 38387c478bd9Sstevel@tonic-gate * if a cache entry's address matches the one in the IRE and 38397c478bd9Sstevel@tonic-gate * that the cache entry's parent has a less specific mask than the 38407c478bd9Sstevel@tonic-gate * one in IRE. The destination of such a cache entry could be the 38417c478bd9Sstevel@tonic-gate * gateway for other cache entries, so we need to flush those as 38427c478bd9Sstevel@tonic-gate * well by looking for gateway addresses matching the IRE's address. 38437c478bd9Sstevel@tonic-gate */ 38447c478bd9Sstevel@tonic-gate void 38457c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire_t *ire, int flag) 38467c478bd9Sstevel@tonic-gate { 38477c478bd9Sstevel@tonic-gate int i; 38487c478bd9Sstevel@tonic-gate ire_t *cire; 38497c478bd9Sstevel@tonic-gate irb_t *irb; 3850f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 38517c478bd9Sstevel@tonic-gate 38527c478bd9Sstevel@tonic-gate if (ire->ire_type & IRE_CACHE) 38537c478bd9Sstevel@tonic-gate return; 38547c478bd9Sstevel@tonic-gate 38557c478bd9Sstevel@tonic-gate /* 38567c478bd9Sstevel@tonic-gate * If a default is just created, there is no point 38577c478bd9Sstevel@tonic-gate * in going through the cache, as there will not be any 38587c478bd9Sstevel@tonic-gate * cached ires. 38597c478bd9Sstevel@tonic-gate */ 38607c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT && flag == IRE_FLUSH_ADD) 38617c478bd9Sstevel@tonic-gate return; 38627c478bd9Sstevel@tonic-gate if (flag == IRE_FLUSH_ADD) { 38637c478bd9Sstevel@tonic-gate /* 38647c478bd9Sstevel@tonic-gate * This selective flush is due to the addition of 38657c478bd9Sstevel@tonic-gate * new IRE. 38667c478bd9Sstevel@tonic-gate */ 3867f4b3ec61Sdh155122 for (i = 0; i < ipst->ips_ip_cache_table_size; i++) { 3868f4b3ec61Sdh155122 irb = &ipst->ips_ip_cache_table[i]; 38697c478bd9Sstevel@tonic-gate if ((cire = irb->irb_ire) == NULL) 38707c478bd9Sstevel@tonic-gate continue; 38717c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 38727c478bd9Sstevel@tonic-gate for (cire = irb->irb_ire; cire != NULL; 38737c478bd9Sstevel@tonic-gate cire = cire->ire_next) { 38747c478bd9Sstevel@tonic-gate if (cire->ire_type != IRE_CACHE) 38757c478bd9Sstevel@tonic-gate continue; 38767c478bd9Sstevel@tonic-gate /* 38777c478bd9Sstevel@tonic-gate * If 'cire' belongs to the same subnet 38787c478bd9Sstevel@tonic-gate * as the new ire being added, and 'cire' 38797c478bd9Sstevel@tonic-gate * is derived from a prefix that is less 38807c478bd9Sstevel@tonic-gate * specific than the new ire being added, 38817c478bd9Sstevel@tonic-gate * we need to flush 'cire'; for instance, 38827c478bd9Sstevel@tonic-gate * when a new interface comes up. 38837c478bd9Sstevel@tonic-gate */ 38847c478bd9Sstevel@tonic-gate if (((cire->ire_addr & ire->ire_mask) == 38857c478bd9Sstevel@tonic-gate (ire->ire_addr & ire->ire_mask)) && 38867c478bd9Sstevel@tonic-gate (ip_mask_to_plen(cire->ire_cmask) <= 38877c478bd9Sstevel@tonic-gate ire->ire_masklen)) { 38887c478bd9Sstevel@tonic-gate ire_delete(cire); 38897c478bd9Sstevel@tonic-gate continue; 38907c478bd9Sstevel@tonic-gate } 38917c478bd9Sstevel@tonic-gate /* 38927c478bd9Sstevel@tonic-gate * This is the case when the ire_gateway_addr 38937c478bd9Sstevel@tonic-gate * of 'cire' belongs to the same subnet as 38947c478bd9Sstevel@tonic-gate * the new ire being added. 38957c478bd9Sstevel@tonic-gate * Flushing such ires is sometimes required to 38967c478bd9Sstevel@tonic-gate * avoid misrouting: say we have a machine with 38977c478bd9Sstevel@tonic-gate * two interfaces (I1 and I2), a default router 38987c478bd9Sstevel@tonic-gate * R on the I1 subnet, and a host route to an 38997c478bd9Sstevel@tonic-gate * off-link destination D with a gateway G on 39007c478bd9Sstevel@tonic-gate * the I2 subnet. 39017c478bd9Sstevel@tonic-gate * Under normal operation, we will have an 39027c478bd9Sstevel@tonic-gate * on-link cache entry for G and an off-link 39037c478bd9Sstevel@tonic-gate * cache entry for D with G as ire_gateway_addr, 39047c478bd9Sstevel@tonic-gate * traffic to D will reach its destination 39057c478bd9Sstevel@tonic-gate * through gateway G. 39067c478bd9Sstevel@tonic-gate * If the administrator does 'ifconfig I2 down', 39077c478bd9Sstevel@tonic-gate * the cache entries for D and G will be 39087c478bd9Sstevel@tonic-gate * flushed. However, G will now be resolved as 39097c478bd9Sstevel@tonic-gate * an off-link destination using R (the default 39107c478bd9Sstevel@tonic-gate * router) as gateway. Then D will also be 39117c478bd9Sstevel@tonic-gate * resolved as an off-link destination using G 39127c478bd9Sstevel@tonic-gate * as gateway - this behavior is due to 39137c478bd9Sstevel@tonic-gate * compatibility reasons, see comment in 39147c478bd9Sstevel@tonic-gate * ire_ihandle_lookup_offlink(). Traffic to D 39157c478bd9Sstevel@tonic-gate * will go to the router R and probably won't 39167c478bd9Sstevel@tonic-gate * reach the destination. 39177c478bd9Sstevel@tonic-gate * The administrator then does 'ifconfig I2 up'. 39187c478bd9Sstevel@tonic-gate * Since G is on the I2 subnet, this routine 39197c478bd9Sstevel@tonic-gate * will flush its cache entry. It must also 39207c478bd9Sstevel@tonic-gate * flush the cache entry for D, otherwise 39217c478bd9Sstevel@tonic-gate * traffic will stay misrouted until the IRE 39227c478bd9Sstevel@tonic-gate * times out. 39237c478bd9Sstevel@tonic-gate */ 39247c478bd9Sstevel@tonic-gate if ((cire->ire_gateway_addr & ire->ire_mask) == 39257c478bd9Sstevel@tonic-gate (ire->ire_addr & ire->ire_mask)) { 39267c478bd9Sstevel@tonic-gate ire_delete(cire); 39277c478bd9Sstevel@tonic-gate continue; 39287c478bd9Sstevel@tonic-gate } 39297c478bd9Sstevel@tonic-gate } 39307c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 39317c478bd9Sstevel@tonic-gate } 39327c478bd9Sstevel@tonic-gate } else { 39337c478bd9Sstevel@tonic-gate /* 39347c478bd9Sstevel@tonic-gate * delete the cache entries based on 39357c478bd9Sstevel@tonic-gate * handle in the IRE as this IRE is 39367c478bd9Sstevel@tonic-gate * being deleted/changed. 39377c478bd9Sstevel@tonic-gate */ 3938f4b3ec61Sdh155122 for (i = 0; i < ipst->ips_ip_cache_table_size; i++) { 3939f4b3ec61Sdh155122 irb = &ipst->ips_ip_cache_table[i]; 39407c478bd9Sstevel@tonic-gate if ((cire = irb->irb_ire) == NULL) 39417c478bd9Sstevel@tonic-gate continue; 39427c478bd9Sstevel@tonic-gate IRB_REFHOLD(irb); 39437c478bd9Sstevel@tonic-gate for (cire = irb->irb_ire; cire != NULL; 39447c478bd9Sstevel@tonic-gate cire = cire->ire_next) { 39457c478bd9Sstevel@tonic-gate if (cire->ire_type != IRE_CACHE) 39467c478bd9Sstevel@tonic-gate continue; 39477c478bd9Sstevel@tonic-gate if ((cire->ire_phandle == 0 || 39487c478bd9Sstevel@tonic-gate cire->ire_phandle != ire->ire_phandle) && 39497c478bd9Sstevel@tonic-gate (cire->ire_ihandle == 0 || 39507c478bd9Sstevel@tonic-gate cire->ire_ihandle != ire->ire_ihandle)) 39517c478bd9Sstevel@tonic-gate continue; 39527c478bd9Sstevel@tonic-gate ire_delete(cire); 39537c478bd9Sstevel@tonic-gate } 39547c478bd9Sstevel@tonic-gate IRB_REFRELE(irb); 39557c478bd9Sstevel@tonic-gate } 39567c478bd9Sstevel@tonic-gate } 39577c478bd9Sstevel@tonic-gate } 39587c478bd9Sstevel@tonic-gate 39597c478bd9Sstevel@tonic-gate /* 39607c478bd9Sstevel@tonic-gate * Matches the arguments passed with the values in the ire. 39617c478bd9Sstevel@tonic-gate * 39627c478bd9Sstevel@tonic-gate * Note: for match types that match using "ipif" passed in, ipif 39637c478bd9Sstevel@tonic-gate * must be checked for non-NULL before calling this routine. 39647c478bd9Sstevel@tonic-gate */ 3965c793af95Ssangeeta boolean_t 39667c478bd9Sstevel@tonic-gate ire_match_args(ire_t *ire, ipaddr_t addr, ipaddr_t mask, ipaddr_t gateway, 396745916cd2Sjpk int type, const ipif_t *ipif, zoneid_t zoneid, uint32_t ihandle, 396845916cd2Sjpk const ts_label_t *tsl, int match_flags) 39697c478bd9Sstevel@tonic-gate { 39707c478bd9Sstevel@tonic-gate ill_t *ire_ill = NULL, *dst_ill; 39717c478bd9Sstevel@tonic-gate ill_t *ipif_ill = NULL; 39727c478bd9Sstevel@tonic-gate ill_group_t *ire_ill_group = NULL; 39737c478bd9Sstevel@tonic-gate ill_group_t *ipif_ill_group = NULL; 39747c478bd9Sstevel@tonic-gate 39757c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 39767c478bd9Sstevel@tonic-gate ASSERT((ire->ire_addr & ~ire->ire_mask) == 0); 39777c478bd9Sstevel@tonic-gate ASSERT((!(match_flags & (MATCH_IRE_ILL|MATCH_IRE_ILL_GROUP))) || 39787c478bd9Sstevel@tonic-gate (ipif != NULL && !ipif->ipif_isv6)); 39797c478bd9Sstevel@tonic-gate 39807c478bd9Sstevel@tonic-gate /* 39817c478bd9Sstevel@tonic-gate * HIDDEN cache entries have to be looked up specifically with 39827c478bd9Sstevel@tonic-gate * MATCH_IRE_MARK_HIDDEN. MATCH_IRE_MARK_HIDDEN is usually set 39837c478bd9Sstevel@tonic-gate * when the interface is FAILED or INACTIVE. In that case, 39847c478bd9Sstevel@tonic-gate * any IRE_CACHES that exists should be marked with 39857c478bd9Sstevel@tonic-gate * IRE_MARK_HIDDEN. So, we don't really need to match below 39867c478bd9Sstevel@tonic-gate * for IRE_MARK_HIDDEN. But we do so for consistency. 39877c478bd9Sstevel@tonic-gate */ 39887c478bd9Sstevel@tonic-gate if (!(match_flags & MATCH_IRE_MARK_HIDDEN) && 39897c478bd9Sstevel@tonic-gate (ire->ire_marks & IRE_MARK_HIDDEN)) 39907c478bd9Sstevel@tonic-gate return (B_FALSE); 39917c478bd9Sstevel@tonic-gate 399243d18f1cSpriyanka /* 399343d18f1cSpriyanka * MATCH_IRE_MARK_PRIVATE_ADDR is set when IP_NEXTHOP option 399443d18f1cSpriyanka * is used. In that case the routing table is bypassed and the 399543d18f1cSpriyanka * packets are sent directly to the specified nexthop. The 399643d18f1cSpriyanka * IRE_CACHE entry representing this route should be marked 399743d18f1cSpriyanka * with IRE_MARK_PRIVATE_ADDR. 399843d18f1cSpriyanka */ 399943d18f1cSpriyanka 400043d18f1cSpriyanka if (!(match_flags & MATCH_IRE_MARK_PRIVATE_ADDR) && 400143d18f1cSpriyanka (ire->ire_marks & IRE_MARK_PRIVATE_ADDR)) 400243d18f1cSpriyanka return (B_FALSE); 400343d18f1cSpriyanka 400445916cd2Sjpk if (zoneid != ALL_ZONES && zoneid != ire->ire_zoneid && 400545916cd2Sjpk ire->ire_zoneid != ALL_ZONES) { 40067c478bd9Sstevel@tonic-gate /* 40077c478bd9Sstevel@tonic-gate * If MATCH_IRE_ZONEONLY has been set and the supplied zoneid is 40087c478bd9Sstevel@tonic-gate * valid and does not match that of ire_zoneid, a failure to 40097c478bd9Sstevel@tonic-gate * match is reported at this point. Otherwise, since some IREs 40107c478bd9Sstevel@tonic-gate * that are available in the global zone can be used in local 40117c478bd9Sstevel@tonic-gate * zones, additional checks need to be performed: 40127c478bd9Sstevel@tonic-gate * 40137c478bd9Sstevel@tonic-gate * IRE_BROADCAST, IRE_CACHE and IRE_LOOPBACK 40147c478bd9Sstevel@tonic-gate * entries should never be matched in this situation. 40157c478bd9Sstevel@tonic-gate * 40167c478bd9Sstevel@tonic-gate * IRE entries that have an interface associated with them 40177c478bd9Sstevel@tonic-gate * should in general not match unless they are an IRE_LOCAL 40187c478bd9Sstevel@tonic-gate * or in the case when MATCH_IRE_DEFAULT has been set in 40197c478bd9Sstevel@tonic-gate * the caller. In the case of the former, checking of the 40207c478bd9Sstevel@tonic-gate * other fields supplied should take place. 40217c478bd9Sstevel@tonic-gate * 40227c478bd9Sstevel@tonic-gate * In the case where MATCH_IRE_DEFAULT has been set, 40237c478bd9Sstevel@tonic-gate * all of the ipif's associated with the IRE's ill are 40247c478bd9Sstevel@tonic-gate * checked to see if there is a matching zoneid. If any 40257c478bd9Sstevel@tonic-gate * one ipif has a matching zoneid, this IRE is a 40267c478bd9Sstevel@tonic-gate * potential candidate so checking of the other fields 40277c478bd9Sstevel@tonic-gate * takes place. 40287c478bd9Sstevel@tonic-gate * 40297c478bd9Sstevel@tonic-gate * In the case where the IRE_INTERFACE has a usable source 40307c478bd9Sstevel@tonic-gate * address (indicated by ill_usesrc_ifindex) in the 40317c478bd9Sstevel@tonic-gate * correct zone then it's permitted to return this IRE 40327c478bd9Sstevel@tonic-gate */ 40337c478bd9Sstevel@tonic-gate if (match_flags & MATCH_IRE_ZONEONLY) 40347c478bd9Sstevel@tonic-gate return (B_FALSE); 40357c478bd9Sstevel@tonic-gate if (ire->ire_type & (IRE_BROADCAST | IRE_CACHE | IRE_LOOPBACK)) 40367c478bd9Sstevel@tonic-gate return (B_FALSE); 40377c478bd9Sstevel@tonic-gate /* 40387c478bd9Sstevel@tonic-gate * Note, IRE_INTERFACE can have the stq as NULL. For 40397c478bd9Sstevel@tonic-gate * example, if the default multicast route is tied to 40407c478bd9Sstevel@tonic-gate * the loopback address. 40417c478bd9Sstevel@tonic-gate */ 40427c478bd9Sstevel@tonic-gate if ((ire->ire_type & IRE_INTERFACE) && 40437c478bd9Sstevel@tonic-gate (ire->ire_stq != NULL)) { 40447c478bd9Sstevel@tonic-gate dst_ill = (ill_t *)ire->ire_stq->q_ptr; 40457c478bd9Sstevel@tonic-gate /* 40467c478bd9Sstevel@tonic-gate * If there is a usable source address in the 40477c478bd9Sstevel@tonic-gate * zone, then it's ok to return an 40487c478bd9Sstevel@tonic-gate * IRE_INTERFACE 40497c478bd9Sstevel@tonic-gate */ 40507c478bd9Sstevel@tonic-gate if (ipif_usesrc_avail(dst_ill, zoneid)) { 40517c478bd9Sstevel@tonic-gate ip3dbg(("ire_match_args: dst_ill %p match %d\n", 40527c478bd9Sstevel@tonic-gate (void *)dst_ill, 40537c478bd9Sstevel@tonic-gate (ire->ire_addr == (addr & mask)))); 40547c478bd9Sstevel@tonic-gate } else { 40557c478bd9Sstevel@tonic-gate ip3dbg(("ire_match_args: src_ipif NULL" 40567c478bd9Sstevel@tonic-gate " dst_ill %p\n", (void *)dst_ill)); 40577c478bd9Sstevel@tonic-gate return (B_FALSE); 40587c478bd9Sstevel@tonic-gate } 40597c478bd9Sstevel@tonic-gate } 40607c478bd9Sstevel@tonic-gate if (ire->ire_ipif != NULL && ire->ire_type != IRE_LOCAL && 40617c478bd9Sstevel@tonic-gate !(ire->ire_type & IRE_INTERFACE)) { 40627c478bd9Sstevel@tonic-gate ipif_t *tipif; 40637c478bd9Sstevel@tonic-gate 40647c478bd9Sstevel@tonic-gate if ((match_flags & MATCH_IRE_DEFAULT) == 0) { 40657c478bd9Sstevel@tonic-gate return (B_FALSE); 40667c478bd9Sstevel@tonic-gate } 40677c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_ipif->ipif_ill->ill_lock); 40687c478bd9Sstevel@tonic-gate for (tipif = ire->ire_ipif->ipif_ill->ill_ipif; 40697c478bd9Sstevel@tonic-gate tipif != NULL; tipif = tipif->ipif_next) { 40707c478bd9Sstevel@tonic-gate if (IPIF_CAN_LOOKUP(tipif) && 40717c478bd9Sstevel@tonic-gate (tipif->ipif_flags & IPIF_UP) && 407245916cd2Sjpk (tipif->ipif_zoneid == zoneid || 407345916cd2Sjpk tipif->ipif_zoneid == ALL_ZONES)) 40747c478bd9Sstevel@tonic-gate break; 40757c478bd9Sstevel@tonic-gate } 40767c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_ipif->ipif_ill->ill_lock); 40777c478bd9Sstevel@tonic-gate if (tipif == NULL) { 40787c478bd9Sstevel@tonic-gate return (B_FALSE); 40797c478bd9Sstevel@tonic-gate } 40807c478bd9Sstevel@tonic-gate } 40817c478bd9Sstevel@tonic-gate } 40827c478bd9Sstevel@tonic-gate 40837c478bd9Sstevel@tonic-gate /* 40847c478bd9Sstevel@tonic-gate * For IRE_CACHES, MATCH_IRE_ILL/ILL_GROUP really means that 40857c478bd9Sstevel@tonic-gate * somebody wants to send out on a particular interface which 40867c478bd9Sstevel@tonic-gate * is given by ire_stq and hence use ire_stq to derive the ill 40877c478bd9Sstevel@tonic-gate * value. ire_ipif for IRE_CACHES is just the means of getting 40887c478bd9Sstevel@tonic-gate * a source address i.e ire_src_addr = ire->ire_ipif->ipif_src_addr. 40897c478bd9Sstevel@tonic-gate * ire_to_ill does the right thing for this. 40907c478bd9Sstevel@tonic-gate */ 40917c478bd9Sstevel@tonic-gate if (match_flags & (MATCH_IRE_ILL|MATCH_IRE_ILL_GROUP)) { 40927c478bd9Sstevel@tonic-gate ire_ill = ire_to_ill(ire); 40937c478bd9Sstevel@tonic-gate if (ire_ill != NULL) 40947c478bd9Sstevel@tonic-gate ire_ill_group = ire_ill->ill_group; 40957c478bd9Sstevel@tonic-gate ipif_ill = ipif->ipif_ill; 40967c478bd9Sstevel@tonic-gate ipif_ill_group = ipif_ill->ill_group; 40977c478bd9Sstevel@tonic-gate } 40987c478bd9Sstevel@tonic-gate 40997c478bd9Sstevel@tonic-gate if ((ire->ire_addr == (addr & mask)) && 41007c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_GW)) || 41017c478bd9Sstevel@tonic-gate (ire->ire_gateway_addr == gateway)) && 41027c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_TYPE)) || 41037c478bd9Sstevel@tonic-gate (ire->ire_type & type)) && 41047c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_SRC)) || 41057c478bd9Sstevel@tonic-gate (ire->ire_src_addr == ipif->ipif_src_addr)) && 41067c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_IPIF)) || 41077c478bd9Sstevel@tonic-gate (ire->ire_ipif == ipif)) && 41087c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_MARK_HIDDEN)) || 41097c478bd9Sstevel@tonic-gate (ire->ire_type != IRE_CACHE || 41107c478bd9Sstevel@tonic-gate ire->ire_marks & IRE_MARK_HIDDEN)) && 411143d18f1cSpriyanka ((!(match_flags & MATCH_IRE_MARK_PRIVATE_ADDR)) || 411243d18f1cSpriyanka (ire->ire_type != IRE_CACHE || 411343d18f1cSpriyanka ire->ire_marks & IRE_MARK_PRIVATE_ADDR)) && 41147c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_ILL)) || 41157c478bd9Sstevel@tonic-gate (ire_ill == ipif_ill)) && 41167c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_IHANDLE)) || 41177c478bd9Sstevel@tonic-gate (ire->ire_ihandle == ihandle)) && 4118c793af95Ssangeeta ((!(match_flags & MATCH_IRE_MASK)) || 4119c793af95Ssangeeta (ire->ire_mask == mask)) && 41207c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_ILL_GROUP)) || 41217c478bd9Sstevel@tonic-gate (ire_ill == ipif_ill) || 41227c478bd9Sstevel@tonic-gate (ire_ill_group != NULL && 412345916cd2Sjpk ire_ill_group == ipif_ill_group)) && 412445916cd2Sjpk ((!(match_flags & MATCH_IRE_SECATTR)) || 412545916cd2Sjpk (!is_system_labeled()) || 412645916cd2Sjpk (tsol_ire_match_gwattr(ire, tsl) == 0))) { 41277c478bd9Sstevel@tonic-gate /* We found the matched IRE */ 41287c478bd9Sstevel@tonic-gate return (B_TRUE); 41297c478bd9Sstevel@tonic-gate } 41307c478bd9Sstevel@tonic-gate return (B_FALSE); 41317c478bd9Sstevel@tonic-gate } 41327c478bd9Sstevel@tonic-gate 41337c478bd9Sstevel@tonic-gate 41347c478bd9Sstevel@tonic-gate /* 41357c478bd9Sstevel@tonic-gate * Lookup for a route in all the tables 41367c478bd9Sstevel@tonic-gate */ 41377c478bd9Sstevel@tonic-gate ire_t * 41387c478bd9Sstevel@tonic-gate ire_route_lookup(ipaddr_t addr, ipaddr_t mask, ipaddr_t gateway, 413945916cd2Sjpk int type, const ipif_t *ipif, ire_t **pire, zoneid_t zoneid, 4140f4b3ec61Sdh155122 const ts_label_t *tsl, int flags, ip_stack_t *ipst) 41417c478bd9Sstevel@tonic-gate { 41427c478bd9Sstevel@tonic-gate ire_t *ire = NULL; 41437c478bd9Sstevel@tonic-gate 41447c478bd9Sstevel@tonic-gate /* 41457c478bd9Sstevel@tonic-gate * ire_match_args() will dereference ipif MATCH_IRE_SRC or 41467c478bd9Sstevel@tonic-gate * MATCH_IRE_ILL is set. 41477c478bd9Sstevel@tonic-gate */ 41487c478bd9Sstevel@tonic-gate if ((flags & (MATCH_IRE_SRC | MATCH_IRE_ILL | MATCH_IRE_ILL_GROUP)) && 41497c478bd9Sstevel@tonic-gate (ipif == NULL)) 41507c478bd9Sstevel@tonic-gate return (NULL); 41517c478bd9Sstevel@tonic-gate 41527c478bd9Sstevel@tonic-gate /* 41537c478bd9Sstevel@tonic-gate * might be asking for a cache lookup, 41547c478bd9Sstevel@tonic-gate * This is not best way to lookup cache, 41557c478bd9Sstevel@tonic-gate * user should call ire_cache_lookup directly. 41567c478bd9Sstevel@tonic-gate * 41577c478bd9Sstevel@tonic-gate * If MATCH_IRE_TYPE was set, first lookup in the cache table and then 41587c478bd9Sstevel@tonic-gate * in the forwarding table, if the applicable type flags were set. 41597c478bd9Sstevel@tonic-gate */ 41607c478bd9Sstevel@tonic-gate if ((flags & MATCH_IRE_TYPE) == 0 || (type & IRE_CACHETABLE) != 0) { 41617c478bd9Sstevel@tonic-gate ire = ire_ctable_lookup(addr, gateway, type, ipif, zoneid, 4162f4b3ec61Sdh155122 tsl, flags, ipst); 41637c478bd9Sstevel@tonic-gate if (ire != NULL) 41647c478bd9Sstevel@tonic-gate return (ire); 41657c478bd9Sstevel@tonic-gate } 41667c478bd9Sstevel@tonic-gate if ((flags & MATCH_IRE_TYPE) == 0 || (type & IRE_FORWARDTABLE) != 0) { 41677c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(addr, mask, gateway, type, ipif, pire, 4168f4b3ec61Sdh155122 zoneid, 0, tsl, flags, ipst); 41697c478bd9Sstevel@tonic-gate } 41707c478bd9Sstevel@tonic-gate return (ire); 41717c478bd9Sstevel@tonic-gate } 41727c478bd9Sstevel@tonic-gate 41737c478bd9Sstevel@tonic-gate 41747c478bd9Sstevel@tonic-gate /* 417545916cd2Sjpk * Delete the IRE cache for the gateway and all IRE caches whose 417645916cd2Sjpk * ire_gateway_addr points to this gateway, and allow them to 417745916cd2Sjpk * be created on demand by ip_newroute. 417845916cd2Sjpk */ 417945916cd2Sjpk void 4180f4b3ec61Sdh155122 ire_clookup_delete_cache_gw(ipaddr_t addr, zoneid_t zoneid, ip_stack_t *ipst) 418145916cd2Sjpk { 418245916cd2Sjpk irb_t *irb; 418345916cd2Sjpk ire_t *ire; 418445916cd2Sjpk 4185f4b3ec61Sdh155122 irb = &ipst->ips_ip_cache_table[IRE_ADDR_HASH(addr, 4186f4b3ec61Sdh155122 ipst->ips_ip_cache_table_size)]; 418745916cd2Sjpk IRB_REFHOLD(irb); 418845916cd2Sjpk for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 418945916cd2Sjpk if (ire->ire_marks & IRE_MARK_CONDEMNED) 419045916cd2Sjpk continue; 419145916cd2Sjpk 419245916cd2Sjpk ASSERT(ire->ire_mask == IP_HOST_MASK); 419345916cd2Sjpk if (ire_match_args(ire, addr, ire->ire_mask, 0, IRE_CACHE, 419445916cd2Sjpk NULL, zoneid, 0, NULL, MATCH_IRE_TYPE)) { 419545916cd2Sjpk ire_delete(ire); 419645916cd2Sjpk } 419745916cd2Sjpk } 419845916cd2Sjpk IRB_REFRELE(irb); 419945916cd2Sjpk 4200f4b3ec61Sdh155122 ire_walk_v4(ire_delete_cache_gw, &addr, zoneid, ipst); 420145916cd2Sjpk } 420245916cd2Sjpk 420345916cd2Sjpk /* 42047c478bd9Sstevel@tonic-gate * Looks up cache table for a route. 42057c478bd9Sstevel@tonic-gate * specific lookup can be indicated by 42067c478bd9Sstevel@tonic-gate * passing the MATCH_* flags and the 42077c478bd9Sstevel@tonic-gate * necessary parameters. 42087c478bd9Sstevel@tonic-gate */ 42097c478bd9Sstevel@tonic-gate ire_t * 421045916cd2Sjpk ire_ctable_lookup(ipaddr_t addr, ipaddr_t gateway, int type, const ipif_t *ipif, 4211f4b3ec61Sdh155122 zoneid_t zoneid, const ts_label_t *tsl, int flags, ip_stack_t *ipst) 42127c478bd9Sstevel@tonic-gate { 42137c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 42147c478bd9Sstevel@tonic-gate ire_t *ire; 42157c478bd9Sstevel@tonic-gate 42167c478bd9Sstevel@tonic-gate /* 42177c478bd9Sstevel@tonic-gate * ire_match_args() will dereference ipif MATCH_IRE_SRC or 42187c478bd9Sstevel@tonic-gate * MATCH_IRE_ILL is set. 42197c478bd9Sstevel@tonic-gate */ 42207c478bd9Sstevel@tonic-gate if ((flags & (MATCH_IRE_SRC | MATCH_IRE_ILL | MATCH_IRE_ILL_GROUP)) && 42217c478bd9Sstevel@tonic-gate (ipif == NULL)) 42227c478bd9Sstevel@tonic-gate return (NULL); 42237c478bd9Sstevel@tonic-gate 4224f4b3ec61Sdh155122 irb_ptr = &ipst->ips_ip_cache_table[IRE_ADDR_HASH(addr, 4225f4b3ec61Sdh155122 ipst->ips_ip_cache_table_size)]; 42267c478bd9Sstevel@tonic-gate rw_enter(&irb_ptr->irb_lock, RW_READER); 42277c478bd9Sstevel@tonic-gate for (ire = irb_ptr->irb_ire; ire != NULL; ire = ire->ire_next) { 42287c478bd9Sstevel@tonic-gate if (ire->ire_marks & IRE_MARK_CONDEMNED) 42297c478bd9Sstevel@tonic-gate continue; 42307c478bd9Sstevel@tonic-gate ASSERT(ire->ire_mask == IP_HOST_MASK); 42317c478bd9Sstevel@tonic-gate if (ire_match_args(ire, addr, ire->ire_mask, gateway, type, 423245916cd2Sjpk ipif, zoneid, 0, tsl, flags)) { 42337c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 42347c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 42357c478bd9Sstevel@tonic-gate return (ire); 42367c478bd9Sstevel@tonic-gate } 42377c478bd9Sstevel@tonic-gate } 42387c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 42397c478bd9Sstevel@tonic-gate return (NULL); 42407c478bd9Sstevel@tonic-gate } 42417c478bd9Sstevel@tonic-gate 42427c478bd9Sstevel@tonic-gate /* 42435597b60aSnordmark * Check whether the IRE_LOCAL and the IRE potentially used to transmit 42445597b60aSnordmark * (could be an IRE_CACHE, IRE_BROADCAST, or IRE_INTERFACE) are part of 42455597b60aSnordmark * the same ill group. 42465597b60aSnordmark */ 42475597b60aSnordmark boolean_t 42485597b60aSnordmark ire_local_same_ill_group(ire_t *ire_local, ire_t *xmit_ire) 42495597b60aSnordmark { 42505597b60aSnordmark ill_t *recv_ill, *xmit_ill; 42515597b60aSnordmark ill_group_t *recv_group, *xmit_group; 42525597b60aSnordmark 42532bc4236aSnordmark ASSERT(ire_local->ire_type & (IRE_LOCAL|IRE_LOOPBACK)); 4254aa2eaee6Snordmark ASSERT(xmit_ire->ire_type & (IRE_CACHETABLE|IRE_INTERFACE)); 42555597b60aSnordmark 42562bc4236aSnordmark recv_ill = ire_to_ill(ire_local); 42572bc4236aSnordmark xmit_ill = ire_to_ill(xmit_ire); 42582bc4236aSnordmark 42592bc4236aSnordmark ASSERT(recv_ill != NULL); 42602bc4236aSnordmark ASSERT(xmit_ill != NULL); 42615597b60aSnordmark 42625597b60aSnordmark if (recv_ill == xmit_ill) 42635597b60aSnordmark return (B_TRUE); 42645597b60aSnordmark 42655597b60aSnordmark recv_group = recv_ill->ill_group; 42665597b60aSnordmark xmit_group = xmit_ill->ill_group; 42675597b60aSnordmark 42685597b60aSnordmark if (recv_group != NULL && recv_group == xmit_group) 42695597b60aSnordmark return (B_TRUE); 42705597b60aSnordmark 42715597b60aSnordmark return (B_FALSE); 42725597b60aSnordmark } 42735597b60aSnordmark 42745597b60aSnordmark /* 42755597b60aSnordmark * Check if the IRE_LOCAL uses the same ill (group) as another route would use. 4276aa2eaee6Snordmark * If there is no alternate route, or the alternate is a REJECT or BLACKHOLE, 4277aa2eaee6Snordmark * then we don't allow this IRE_LOCAL to be used. 42785597b60aSnordmark */ 42795597b60aSnordmark boolean_t 42805597b60aSnordmark ire_local_ok_across_zones(ire_t *ire_local, zoneid_t zoneid, void *addr, 4281f4b3ec61Sdh155122 const ts_label_t *tsl, ip_stack_t *ipst) 42825597b60aSnordmark { 42835597b60aSnordmark ire_t *alt_ire; 42845597b60aSnordmark boolean_t rval; 42855597b60aSnordmark 42865597b60aSnordmark if (ire_local->ire_ipversion == IPV4_VERSION) { 42875597b60aSnordmark alt_ire = ire_ftable_lookup(*((ipaddr_t *)addr), 0, 0, 0, NULL, 42885597b60aSnordmark NULL, zoneid, 0, tsl, 42895597b60aSnordmark MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | 4290f4b3ec61Sdh155122 MATCH_IRE_RJ_BHOLE, ipst); 42915597b60aSnordmark } else { 42925597b60aSnordmark alt_ire = ire_ftable_lookup_v6((in6_addr_t *)addr, NULL, NULL, 42935597b60aSnordmark 0, NULL, NULL, zoneid, 0, tsl, 42945597b60aSnordmark MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | 4295f4b3ec61Sdh155122 MATCH_IRE_RJ_BHOLE, ipst); 42965597b60aSnordmark } 42975597b60aSnordmark 42985597b60aSnordmark if (alt_ire == NULL) 42995597b60aSnordmark return (B_FALSE); 43005597b60aSnordmark 4301aa2eaee6Snordmark if (alt_ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) { 4302aa2eaee6Snordmark ire_refrele(alt_ire); 4303aa2eaee6Snordmark return (B_FALSE); 4304aa2eaee6Snordmark } 43055597b60aSnordmark rval = ire_local_same_ill_group(ire_local, alt_ire); 43065597b60aSnordmark 43075597b60aSnordmark ire_refrele(alt_ire); 43085597b60aSnordmark return (rval); 43095597b60aSnordmark } 43105597b60aSnordmark 43115597b60aSnordmark /* 43127c478bd9Sstevel@tonic-gate * Lookup cache. Don't return IRE_MARK_HIDDEN entries. Callers 43137c478bd9Sstevel@tonic-gate * should use ire_ctable_lookup with MATCH_IRE_MARK_HIDDEN to get 43147c478bd9Sstevel@tonic-gate * to the hidden ones. 43155597b60aSnordmark * 43165597b60aSnordmark * In general the zoneid has to match (where ALL_ZONES match all of them). 43175597b60aSnordmark * But for IRE_LOCAL we also need to handle the case where L2 should 43185597b60aSnordmark * conceptually loop back the packet. This is necessary since neither 43195597b60aSnordmark * Ethernet drivers nor Ethernet hardware loops back packets sent to their 43205597b60aSnordmark * own MAC address. This loopback is needed when the normal 43215597b60aSnordmark * routes (ignoring IREs with different zoneids) would send out the packet on 43225597b60aSnordmark * the same ill (or ill group) as the ill with which this IRE_LOCAL is 43235597b60aSnordmark * associated. 43245597b60aSnordmark * 43255597b60aSnordmark * Earlier versions of this code always matched an IRE_LOCAL independently of 43265597b60aSnordmark * the zoneid. We preserve that earlier behavior when 43275597b60aSnordmark * ip_restrict_interzone_loopback is turned off. 43287c478bd9Sstevel@tonic-gate */ 43297c478bd9Sstevel@tonic-gate ire_t * 4330f4b3ec61Sdh155122 ire_cache_lookup(ipaddr_t addr, zoneid_t zoneid, const ts_label_t *tsl, 4331f4b3ec61Sdh155122 ip_stack_t *ipst) 43327c478bd9Sstevel@tonic-gate { 43337c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 43347c478bd9Sstevel@tonic-gate ire_t *ire; 43357c478bd9Sstevel@tonic-gate 4336f4b3ec61Sdh155122 irb_ptr = &ipst->ips_ip_cache_table[IRE_ADDR_HASH(addr, 4337f4b3ec61Sdh155122 ipst->ips_ip_cache_table_size)]; 43387c478bd9Sstevel@tonic-gate rw_enter(&irb_ptr->irb_lock, RW_READER); 43397c478bd9Sstevel@tonic-gate for (ire = irb_ptr->irb_ire; ire != NULL; ire = ire->ire_next) { 434043d18f1cSpriyanka if (ire->ire_marks & (IRE_MARK_CONDEMNED | 434143d18f1cSpriyanka IRE_MARK_HIDDEN | IRE_MARK_PRIVATE_ADDR)) { 43427c478bd9Sstevel@tonic-gate continue; 434343d18f1cSpriyanka } 43447c478bd9Sstevel@tonic-gate if (ire->ire_addr == addr) { 434545916cd2Sjpk /* 434645916cd2Sjpk * Finally, check if the security policy has any 434745916cd2Sjpk * restriction on using this route for the specified 434845916cd2Sjpk * message. 434945916cd2Sjpk */ 435045916cd2Sjpk if (tsl != NULL && 435145916cd2Sjpk ire->ire_gw_secattr != NULL && 435245916cd2Sjpk tsol_ire_match_gwattr(ire, tsl) != 0) { 435345916cd2Sjpk continue; 435445916cd2Sjpk } 435545916cd2Sjpk 43567c478bd9Sstevel@tonic-gate if (zoneid == ALL_ZONES || ire->ire_zoneid == zoneid || 43575597b60aSnordmark ire->ire_zoneid == ALL_ZONES) { 43585597b60aSnordmark IRE_REFHOLD(ire); 43595597b60aSnordmark rw_exit(&irb_ptr->irb_lock); 43605597b60aSnordmark return (ire); 43615597b60aSnordmark } 43625597b60aSnordmark 43635597b60aSnordmark if (ire->ire_type == IRE_LOCAL) { 4364f4b3ec61Sdh155122 if (ipst->ips_ip_restrict_interzone_loopback && 43655597b60aSnordmark !ire_local_ok_across_zones(ire, zoneid, 4366f4b3ec61Sdh155122 &addr, tsl, ipst)) 43675597b60aSnordmark continue; 43685597b60aSnordmark 43697c478bd9Sstevel@tonic-gate IRE_REFHOLD(ire); 43707c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 43717c478bd9Sstevel@tonic-gate return (ire); 43727c478bd9Sstevel@tonic-gate } 43737c478bd9Sstevel@tonic-gate } 43747c478bd9Sstevel@tonic-gate } 43757c478bd9Sstevel@tonic-gate rw_exit(&irb_ptr->irb_lock); 43767c478bd9Sstevel@tonic-gate return (NULL); 43777c478bd9Sstevel@tonic-gate } 43787c478bd9Sstevel@tonic-gate 43797c478bd9Sstevel@tonic-gate /* 43807c478bd9Sstevel@tonic-gate * Locate the interface ire that is tied to the cache ire 'cire' via 43817c478bd9Sstevel@tonic-gate * cire->ire_ihandle. 43827c478bd9Sstevel@tonic-gate * 43837c478bd9Sstevel@tonic-gate * We are trying to create the cache ire for an offlink destn based 43847c478bd9Sstevel@tonic-gate * on the cache ire of the gateway in 'cire'. 'pire' is the prefix ire 43857c478bd9Sstevel@tonic-gate * as found by ip_newroute(). We are called from ip_newroute() in 43867c478bd9Sstevel@tonic-gate * the IRE_CACHE case. 43877c478bd9Sstevel@tonic-gate */ 43887c478bd9Sstevel@tonic-gate ire_t * 43897c478bd9Sstevel@tonic-gate ire_ihandle_lookup_offlink(ire_t *cire, ire_t *pire) 43907c478bd9Sstevel@tonic-gate { 43917c478bd9Sstevel@tonic-gate ire_t *ire; 43927c478bd9Sstevel@tonic-gate int match_flags; 43937c478bd9Sstevel@tonic-gate ipaddr_t gw_addr; 43947c478bd9Sstevel@tonic-gate ipif_t *gw_ipif; 4395f4b3ec61Sdh155122 ip_stack_t *ipst = cire->ire_ipst; 43967c478bd9Sstevel@tonic-gate 43977c478bd9Sstevel@tonic-gate ASSERT(cire != NULL && pire != NULL); 43987c478bd9Sstevel@tonic-gate 43997c478bd9Sstevel@tonic-gate /* 44007c478bd9Sstevel@tonic-gate * We don't need to specify the zoneid to ire_ftable_lookup() below 44017c478bd9Sstevel@tonic-gate * because the ihandle refers to an ipif which can be in only one zone. 44027c478bd9Sstevel@tonic-gate */ 44037c478bd9Sstevel@tonic-gate match_flags = MATCH_IRE_TYPE | MATCH_IRE_IHANDLE | MATCH_IRE_MASK; 44047c478bd9Sstevel@tonic-gate /* 44057c478bd9Sstevel@tonic-gate * ip_newroute calls ire_ftable_lookup with MATCH_IRE_ILL only 44067c478bd9Sstevel@tonic-gate * for on-link hosts. We should never be here for onlink. 44077c478bd9Sstevel@tonic-gate * Thus, use MATCH_IRE_ILL_GROUP. 44087c478bd9Sstevel@tonic-gate */ 44097c478bd9Sstevel@tonic-gate if (pire->ire_ipif != NULL) 44107c478bd9Sstevel@tonic-gate match_flags |= MATCH_IRE_ILL_GROUP; 44117c478bd9Sstevel@tonic-gate /* 44127c478bd9Sstevel@tonic-gate * We know that the mask of the interface ire equals cire->ire_cmask. 44137c478bd9Sstevel@tonic-gate * (When ip_newroute() created 'cire' for the gateway it set its 44147c478bd9Sstevel@tonic-gate * cmask from the interface ire's mask) 44157c478bd9Sstevel@tonic-gate */ 44167c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(cire->ire_addr, cire->ire_cmask, 0, 44177c478bd9Sstevel@tonic-gate IRE_INTERFACE, pire->ire_ipif, NULL, ALL_ZONES, cire->ire_ihandle, 4418f4b3ec61Sdh155122 NULL, match_flags, ipst); 44197c478bd9Sstevel@tonic-gate if (ire != NULL) 44207c478bd9Sstevel@tonic-gate return (ire); 44217c478bd9Sstevel@tonic-gate /* 44227c478bd9Sstevel@tonic-gate * If we didn't find an interface ire above, we can't declare failure. 44237c478bd9Sstevel@tonic-gate * For backwards compatibility, we need to support prefix routes 44247c478bd9Sstevel@tonic-gate * pointing to next hop gateways that are not on-link. 44257c478bd9Sstevel@tonic-gate * 44267c478bd9Sstevel@tonic-gate * Assume we are trying to ping some offlink destn, and we have the 44277c478bd9Sstevel@tonic-gate * routing table below. 44287c478bd9Sstevel@tonic-gate * 44297c478bd9Sstevel@tonic-gate * Eg. default - gw1 <--- pire (line 1) 44307c478bd9Sstevel@tonic-gate * gw1 - gw2 (line 2) 44317c478bd9Sstevel@tonic-gate * gw2 - hme0 (line 3) 44327c478bd9Sstevel@tonic-gate * 44337c478bd9Sstevel@tonic-gate * If we already have a cache ire for gw1 in 'cire', the 44347c478bd9Sstevel@tonic-gate * ire_ftable_lookup above would have failed, since there is no 44357c478bd9Sstevel@tonic-gate * interface ire to reach gw1. We will fallthru below. 44367c478bd9Sstevel@tonic-gate * 44377c478bd9Sstevel@tonic-gate * Here we duplicate the steps that ire_ftable_lookup() did in 44387c478bd9Sstevel@tonic-gate * getting 'cire' from 'pire', in the MATCH_IRE_RECURSIVE case. 44397c478bd9Sstevel@tonic-gate * The differences are the following 44407c478bd9Sstevel@tonic-gate * i. We want the interface ire only, so we call ire_ftable_lookup() 44417c478bd9Sstevel@tonic-gate * instead of ire_route_lookup() 44427c478bd9Sstevel@tonic-gate * ii. We look for only prefix routes in the 1st call below. 44437c478bd9Sstevel@tonic-gate * ii. We want to match on the ihandle in the 2nd call below. 44447c478bd9Sstevel@tonic-gate */ 44457c478bd9Sstevel@tonic-gate match_flags = MATCH_IRE_TYPE; 44467c478bd9Sstevel@tonic-gate if (pire->ire_ipif != NULL) 44477c478bd9Sstevel@tonic-gate match_flags |= MATCH_IRE_ILL_GROUP; 44487c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(pire->ire_gateway_addr, 0, 0, IRE_OFFSUBNET, 4449f4b3ec61Sdh155122 pire->ire_ipif, NULL, ALL_ZONES, 0, NULL, match_flags, ipst); 44507c478bd9Sstevel@tonic-gate if (ire == NULL) 44517c478bd9Sstevel@tonic-gate return (NULL); 44527c478bd9Sstevel@tonic-gate /* 44537c478bd9Sstevel@tonic-gate * At this point 'ire' corresponds to the entry shown in line 2. 44547c478bd9Sstevel@tonic-gate * gw_addr is 'gw2' in the example above. 44557c478bd9Sstevel@tonic-gate */ 44567c478bd9Sstevel@tonic-gate gw_addr = ire->ire_gateway_addr; 44577c478bd9Sstevel@tonic-gate gw_ipif = ire->ire_ipif; 44587c478bd9Sstevel@tonic-gate ire_refrele(ire); 44597c478bd9Sstevel@tonic-gate 44607c478bd9Sstevel@tonic-gate match_flags |= MATCH_IRE_IHANDLE; 44617c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(gw_addr, 0, 0, IRE_INTERFACE, 4462f4b3ec61Sdh155122 gw_ipif, NULL, ALL_ZONES, cire->ire_ihandle, NULL, match_flags, 4463f4b3ec61Sdh155122 ipst); 44647c478bd9Sstevel@tonic-gate return (ire); 44657c478bd9Sstevel@tonic-gate } 44667c478bd9Sstevel@tonic-gate 44677c478bd9Sstevel@tonic-gate /* 44687c478bd9Sstevel@tonic-gate * Return the IRE_LOOPBACK, IRE_IF_RESOLVER or IRE_IF_NORESOLVER 44697c478bd9Sstevel@tonic-gate * ire associated with the specified ipif. 44707c478bd9Sstevel@tonic-gate * 44717c478bd9Sstevel@tonic-gate * This might occasionally be called when IPIF_UP is not set since 44727c478bd9Sstevel@tonic-gate * the IP_MULTICAST_IF as well as creating interface routes 44737c478bd9Sstevel@tonic-gate * allows specifying a down ipif (ipif_lookup* match ipifs that are down). 44747c478bd9Sstevel@tonic-gate * 44757c478bd9Sstevel@tonic-gate * Note that if IPIF_NOLOCAL, IPIF_NOXMIT, or IPIF_DEPRECATED is set on 44767c478bd9Sstevel@tonic-gate * the ipif, this routine might return NULL. 44777c478bd9Sstevel@tonic-gate */ 44787c478bd9Sstevel@tonic-gate ire_t * 447945916cd2Sjpk ipif_to_ire(const ipif_t *ipif) 44807c478bd9Sstevel@tonic-gate { 44817c478bd9Sstevel@tonic-gate ire_t *ire; 4482f4b3ec61Sdh155122 ip_stack_t *ipst = ipif->ipif_ill->ill_ipst; 44837c478bd9Sstevel@tonic-gate 44847c478bd9Sstevel@tonic-gate ASSERT(!ipif->ipif_isv6); 44857c478bd9Sstevel@tonic-gate if (ipif->ipif_ire_type == IRE_LOOPBACK) { 44867c478bd9Sstevel@tonic-gate ire = ire_ctable_lookup(ipif->ipif_lcl_addr, 0, IRE_LOOPBACK, 4487f4b3ec61Sdh155122 ipif, ALL_ZONES, NULL, (MATCH_IRE_TYPE | MATCH_IRE_IPIF), 4488f4b3ec61Sdh155122 ipst); 44897c478bd9Sstevel@tonic-gate } else if (ipif->ipif_flags & IPIF_POINTOPOINT) { 44907c478bd9Sstevel@tonic-gate /* In this case we need to lookup destination address. */ 44917c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(ipif->ipif_pp_dst_addr, IP_HOST_MASK, 0, 449245916cd2Sjpk IRE_INTERFACE, ipif, NULL, ALL_ZONES, 0, NULL, 4493f4b3ec61Sdh155122 (MATCH_IRE_TYPE | MATCH_IRE_IPIF | MATCH_IRE_MASK), ipst); 44947c478bd9Sstevel@tonic-gate } else { 44957c478bd9Sstevel@tonic-gate ire = ire_ftable_lookup(ipif->ipif_subnet, 44967c478bd9Sstevel@tonic-gate ipif->ipif_net_mask, 0, IRE_INTERFACE, ipif, NULL, 449745916cd2Sjpk ALL_ZONES, 0, NULL, (MATCH_IRE_TYPE | MATCH_IRE_IPIF | 4498f4b3ec61Sdh155122 MATCH_IRE_MASK), ipst); 44997c478bd9Sstevel@tonic-gate } 45007c478bd9Sstevel@tonic-gate return (ire); 45017c478bd9Sstevel@tonic-gate } 45027c478bd9Sstevel@tonic-gate 45037c478bd9Sstevel@tonic-gate /* 45047c478bd9Sstevel@tonic-gate * ire_walk function. 45057c478bd9Sstevel@tonic-gate * Count the number of IRE_CACHE entries in different categories. 45067c478bd9Sstevel@tonic-gate */ 45077c478bd9Sstevel@tonic-gate void 45087c478bd9Sstevel@tonic-gate ire_cache_count(ire_t *ire, char *arg) 45097c478bd9Sstevel@tonic-gate { 45107c478bd9Sstevel@tonic-gate ire_cache_count_t *icc = (ire_cache_count_t *)arg; 45117c478bd9Sstevel@tonic-gate 45127c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) 45137c478bd9Sstevel@tonic-gate return; 45147c478bd9Sstevel@tonic-gate 45157c478bd9Sstevel@tonic-gate icc->icc_total++; 45167c478bd9Sstevel@tonic-gate 45177c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 45187c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 45197c478bd9Sstevel@tonic-gate if (IN6_IS_ADDR_UNSPECIFIED(&ire->ire_gateway_addr_v6)) { 45207c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 45217c478bd9Sstevel@tonic-gate icc->icc_onlink++; 45227c478bd9Sstevel@tonic-gate return; 45237c478bd9Sstevel@tonic-gate } 45247c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 45257c478bd9Sstevel@tonic-gate } else { 45267c478bd9Sstevel@tonic-gate if (ire->ire_gateway_addr == 0) { 45277c478bd9Sstevel@tonic-gate icc->icc_onlink++; 45287c478bd9Sstevel@tonic-gate return; 45297c478bd9Sstevel@tonic-gate } 45307c478bd9Sstevel@tonic-gate } 45317c478bd9Sstevel@tonic-gate 45327c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipif != NULL); 45337c478bd9Sstevel@tonic-gate if (ire->ire_max_frag < ire->ire_ipif->ipif_mtu) 45347c478bd9Sstevel@tonic-gate icc->icc_pmtu++; 45357c478bd9Sstevel@tonic-gate else if (ire->ire_tire_mark != ire->ire_ob_pkt_count + 45367c478bd9Sstevel@tonic-gate ire->ire_ib_pkt_count) 45377c478bd9Sstevel@tonic-gate icc->icc_offlink++; 45387c478bd9Sstevel@tonic-gate else 45397c478bd9Sstevel@tonic-gate icc->icc_unused++; 45407c478bd9Sstevel@tonic-gate } 45417c478bd9Sstevel@tonic-gate 45427c478bd9Sstevel@tonic-gate /* 45437c478bd9Sstevel@tonic-gate * ire_walk function called by ip_trash_ire_reclaim(). 45447c478bd9Sstevel@tonic-gate * Free a fraction of the IRE_CACHE cache entries. The fractions are 45457c478bd9Sstevel@tonic-gate * different for different categories of IRE_CACHE entries. 45467c478bd9Sstevel@tonic-gate * A fraction of zero means to not free any in that category. 45477c478bd9Sstevel@tonic-gate * Use the hash bucket id plus lbolt as a random number. Thus if the fraction 45487c478bd9Sstevel@tonic-gate * is N then every Nth hash bucket chain will be freed. 45497c478bd9Sstevel@tonic-gate */ 45507c478bd9Sstevel@tonic-gate void 45517c478bd9Sstevel@tonic-gate ire_cache_reclaim(ire_t *ire, char *arg) 45527c478bd9Sstevel@tonic-gate { 45537c478bd9Sstevel@tonic-gate ire_cache_reclaim_t *icr = (ire_cache_reclaim_t *)arg; 45547c478bd9Sstevel@tonic-gate uint_t rand; 4555f4b3ec61Sdh155122 ip_stack_t *ipst = icr->icr_ipst; 45567c478bd9Sstevel@tonic-gate 45577c478bd9Sstevel@tonic-gate if (ire->ire_type != IRE_CACHE) 45587c478bd9Sstevel@tonic-gate return; 45597c478bd9Sstevel@tonic-gate 45607c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 45617c478bd9Sstevel@tonic-gate rand = (uint_t)lbolt + 4562f4b3ec61Sdh155122 IRE_ADDR_HASH_V6(ire->ire_addr_v6, 4563f4b3ec61Sdh155122 ipst->ips_ip6_cache_table_size); 45647c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 45657c478bd9Sstevel@tonic-gate if (IN6_IS_ADDR_UNSPECIFIED(&ire->ire_gateway_addr_v6)) { 45667c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 45677c478bd9Sstevel@tonic-gate if (icr->icr_onlink != 0 && 45687c478bd9Sstevel@tonic-gate (rand/icr->icr_onlink)*icr->icr_onlink == rand) { 45697c478bd9Sstevel@tonic-gate ire_delete(ire); 45707c478bd9Sstevel@tonic-gate return; 45717c478bd9Sstevel@tonic-gate } 45727c478bd9Sstevel@tonic-gate goto done; 45737c478bd9Sstevel@tonic-gate } 45747c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 45757c478bd9Sstevel@tonic-gate } else { 45767c478bd9Sstevel@tonic-gate rand = (uint_t)lbolt + 4577f4b3ec61Sdh155122 IRE_ADDR_HASH(ire->ire_addr, ipst->ips_ip_cache_table_size); 45787c478bd9Sstevel@tonic-gate if (ire->ire_gateway_addr == 0) { 45797c478bd9Sstevel@tonic-gate if (icr->icr_onlink != 0 && 45807c478bd9Sstevel@tonic-gate (rand/icr->icr_onlink)*icr->icr_onlink == rand) { 45817c478bd9Sstevel@tonic-gate ire_delete(ire); 45827c478bd9Sstevel@tonic-gate return; 45837c478bd9Sstevel@tonic-gate } 45847c478bd9Sstevel@tonic-gate goto done; 45857c478bd9Sstevel@tonic-gate } 45867c478bd9Sstevel@tonic-gate } 45877c478bd9Sstevel@tonic-gate /* Not onlink IRE */ 45887c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipif != NULL); 45897c478bd9Sstevel@tonic-gate if (ire->ire_max_frag < ire->ire_ipif->ipif_mtu) { 45907c478bd9Sstevel@tonic-gate /* Use ptmu fraction */ 45917c478bd9Sstevel@tonic-gate if (icr->icr_pmtu != 0 && 45927c478bd9Sstevel@tonic-gate (rand/icr->icr_pmtu)*icr->icr_pmtu == rand) { 45937c478bd9Sstevel@tonic-gate ire_delete(ire); 45947c478bd9Sstevel@tonic-gate return; 45957c478bd9Sstevel@tonic-gate } 45967c478bd9Sstevel@tonic-gate } else if (ire->ire_tire_mark != ire->ire_ob_pkt_count + 45977c478bd9Sstevel@tonic-gate ire->ire_ib_pkt_count) { 45987c478bd9Sstevel@tonic-gate /* Use offlink fraction */ 45997c478bd9Sstevel@tonic-gate if (icr->icr_offlink != 0 && 46007c478bd9Sstevel@tonic-gate (rand/icr->icr_offlink)*icr->icr_offlink == rand) { 46017c478bd9Sstevel@tonic-gate ire_delete(ire); 46027c478bd9Sstevel@tonic-gate return; 46037c478bd9Sstevel@tonic-gate } 46047c478bd9Sstevel@tonic-gate } else { 46057c478bd9Sstevel@tonic-gate /* Use unused fraction */ 46067c478bd9Sstevel@tonic-gate if (icr->icr_unused != 0 && 46077c478bd9Sstevel@tonic-gate (rand/icr->icr_unused)*icr->icr_unused == rand) { 46087c478bd9Sstevel@tonic-gate ire_delete(ire); 46097c478bd9Sstevel@tonic-gate return; 46107c478bd9Sstevel@tonic-gate } 46117c478bd9Sstevel@tonic-gate } 46127c478bd9Sstevel@tonic-gate done: 46137c478bd9Sstevel@tonic-gate /* 46147c478bd9Sstevel@tonic-gate * Update tire_mark so that those that haven't been used since this 46157c478bd9Sstevel@tonic-gate * reclaim will be considered unused next time we reclaim. 46167c478bd9Sstevel@tonic-gate */ 46177c478bd9Sstevel@tonic-gate ire->ire_tire_mark = ire->ire_ob_pkt_count + ire->ire_ib_pkt_count; 46187c478bd9Sstevel@tonic-gate } 46197c478bd9Sstevel@tonic-gate 46207c478bd9Sstevel@tonic-gate static void 46217c478bd9Sstevel@tonic-gate power2_roundup(uint32_t *value) 46227c478bd9Sstevel@tonic-gate { 46237c478bd9Sstevel@tonic-gate int i; 46247c478bd9Sstevel@tonic-gate 46257c478bd9Sstevel@tonic-gate for (i = 1; i < 31; i++) { 46267c478bd9Sstevel@tonic-gate if (*value <= (1 << i)) 46277c478bd9Sstevel@tonic-gate break; 46287c478bd9Sstevel@tonic-gate } 46297c478bd9Sstevel@tonic-gate *value = (1 << i); 46307c478bd9Sstevel@tonic-gate } 46317c478bd9Sstevel@tonic-gate 4632f4b3ec61Sdh155122 /* Global init for all zones */ 46337c478bd9Sstevel@tonic-gate void 4634f4b3ec61Sdh155122 ip_ire_g_init() 46357c478bd9Sstevel@tonic-gate { 46367c478bd9Sstevel@tonic-gate /* 46377c478bd9Sstevel@tonic-gate * Create ire caches, ire_reclaim() 46387c478bd9Sstevel@tonic-gate * will give IRE_CACHE back to system when needed. 46397c478bd9Sstevel@tonic-gate * This needs to be done here before anything else, since 46407c478bd9Sstevel@tonic-gate * ire_add() expects the cache to be created. 46417c478bd9Sstevel@tonic-gate */ 46427c478bd9Sstevel@tonic-gate ire_cache = kmem_cache_create("ire_cache", 46437c478bd9Sstevel@tonic-gate sizeof (ire_t), 0, ip_ire_constructor, 46447c478bd9Sstevel@tonic-gate ip_ire_destructor, ip_trash_ire_reclaim, NULL, NULL, 0); 46457c478bd9Sstevel@tonic-gate 4646f4b3ec61Sdh155122 rt_entry_cache = kmem_cache_create("rt_entry", 4647f4b3ec61Sdh155122 sizeof (struct rt_entry), 0, NULL, NULL, NULL, NULL, NULL, 0); 4648f4b3ec61Sdh155122 4649f4b3ec61Sdh155122 /* 4650f4b3ec61Sdh155122 * Have radix code setup kmem caches etc. 4651f4b3ec61Sdh155122 */ 4652f4b3ec61Sdh155122 rn_init(); 4653f4b3ec61Sdh155122 } 4654f4b3ec61Sdh155122 4655f4b3ec61Sdh155122 void 4656f4b3ec61Sdh155122 ip_ire_init(ip_stack_t *ipst) 4657f4b3ec61Sdh155122 { 4658f4b3ec61Sdh155122 int i; 4659f4b3ec61Sdh155122 uint32_t mem_cnt; 4660f4b3ec61Sdh155122 uint32_t cpu_cnt; 4661f4b3ec61Sdh155122 uint32_t min_cnt; 4662f4b3ec61Sdh155122 pgcnt_t mem_avail; 4663f4b3ec61Sdh155122 4664f4b3ec61Sdh155122 /* 4665f4b3ec61Sdh155122 * ip_ire_max_bucket_cnt is sized below based on the memory 4666f4b3ec61Sdh155122 * size and the cpu speed of the machine. This is upper 4667f4b3ec61Sdh155122 * bounded by the compile time value of ip_ire_max_bucket_cnt 4668f4b3ec61Sdh155122 * and is lower bounded by the compile time value of 4669f4b3ec61Sdh155122 * ip_ire_min_bucket_cnt. Similar logic applies to 4670f4b3ec61Sdh155122 * ip6_ire_max_bucket_cnt. 4671f4b3ec61Sdh155122 * 4672f4b3ec61Sdh155122 * We calculate this for each IP Instances in order to use 4673f4b3ec61Sdh155122 * the kmem_avail and ip_ire_{min,max}_bucket_cnt that are 4674f4b3ec61Sdh155122 * in effect when the zone is booted. 4675f4b3ec61Sdh155122 */ 4676f4b3ec61Sdh155122 mem_avail = kmem_avail(); 4677f4b3ec61Sdh155122 mem_cnt = (mem_avail >> ip_ire_mem_ratio) / 4678f4b3ec61Sdh155122 ip_cache_table_size / sizeof (ire_t); 4679f4b3ec61Sdh155122 cpu_cnt = CPU->cpu_type_info.pi_clock >> ip_ire_cpu_ratio; 4680f4b3ec61Sdh155122 4681f4b3ec61Sdh155122 min_cnt = MIN(cpu_cnt, mem_cnt); 4682f4b3ec61Sdh155122 if (min_cnt < ip_ire_min_bucket_cnt) 4683f4b3ec61Sdh155122 min_cnt = ip_ire_min_bucket_cnt; 4684f4b3ec61Sdh155122 if (ip_ire_max_bucket_cnt > min_cnt) { 4685f4b3ec61Sdh155122 ip_ire_max_bucket_cnt = min_cnt; 4686f4b3ec61Sdh155122 } 4687f4b3ec61Sdh155122 4688f4b3ec61Sdh155122 mem_cnt = (mem_avail >> ip_ire_mem_ratio) / 4689f4b3ec61Sdh155122 ip6_cache_table_size / sizeof (ire_t); 4690f4b3ec61Sdh155122 min_cnt = MIN(cpu_cnt, mem_cnt); 4691f4b3ec61Sdh155122 if (min_cnt < ip6_ire_min_bucket_cnt) 4692f4b3ec61Sdh155122 min_cnt = ip6_ire_min_bucket_cnt; 4693f4b3ec61Sdh155122 if (ip6_ire_max_bucket_cnt > min_cnt) { 4694f4b3ec61Sdh155122 ip6_ire_max_bucket_cnt = min_cnt; 4695f4b3ec61Sdh155122 } 4696f4b3ec61Sdh155122 4697f4b3ec61Sdh155122 mutex_init(&ipst->ips_ire_ft_init_lock, NULL, MUTEX_DEFAULT, 0); 4698f4b3ec61Sdh155122 mutex_init(&ipst->ips_ire_handle_lock, NULL, MUTEX_DEFAULT, NULL); 4699f4b3ec61Sdh155122 4700f4b3ec61Sdh155122 (void) rn_inithead((void **)&ipst->ips_ip_ftable, 32); 4701f4b3ec61Sdh155122 4702f4b3ec61Sdh155122 4703f4b3ec61Sdh155122 /* Calculate the IPv4 cache table size. */ 4704f4b3ec61Sdh155122 ipst->ips_ip_cache_table_size = MAX(ip_cache_table_size, 4705f4b3ec61Sdh155122 ((mem_avail >> ip_ire_mem_ratio) / sizeof (ire_t) / 4706f4b3ec61Sdh155122 ip_ire_max_bucket_cnt)); 4707f4b3ec61Sdh155122 if (ipst->ips_ip_cache_table_size > ip_max_cache_table_size) 4708f4b3ec61Sdh155122 ipst->ips_ip_cache_table_size = ip_max_cache_table_size; 4709f4b3ec61Sdh155122 /* 4710f4b3ec61Sdh155122 * Make sure that the table size is always a power of 2. The 4711f4b3ec61Sdh155122 * hash macro IRE_ADDR_HASH() depends on that. 4712f4b3ec61Sdh155122 */ 4713f4b3ec61Sdh155122 power2_roundup(&ipst->ips_ip_cache_table_size); 4714f4b3ec61Sdh155122 4715f4b3ec61Sdh155122 ipst->ips_ip_cache_table = kmem_zalloc(ipst->ips_ip_cache_table_size * 4716f4b3ec61Sdh155122 sizeof (irb_t), KM_SLEEP); 4717f4b3ec61Sdh155122 4718f4b3ec61Sdh155122 for (i = 0; i < ipst->ips_ip_cache_table_size; i++) { 4719f4b3ec61Sdh155122 rw_init(&ipst->ips_ip_cache_table[i].irb_lock, NULL, 4720f4b3ec61Sdh155122 RW_DEFAULT, NULL); 4721f4b3ec61Sdh155122 } 4722f4b3ec61Sdh155122 4723f4b3ec61Sdh155122 /* Calculate the IPv6 cache table size. */ 4724f4b3ec61Sdh155122 ipst->ips_ip6_cache_table_size = MAX(ip6_cache_table_size, 4725f4b3ec61Sdh155122 ((mem_avail >> ip_ire_mem_ratio) / sizeof (ire_t) / 4726f4b3ec61Sdh155122 ip6_ire_max_bucket_cnt)); 4727f4b3ec61Sdh155122 if (ipst->ips_ip6_cache_table_size > ip6_max_cache_table_size) 4728f4b3ec61Sdh155122 ipst->ips_ip6_cache_table_size = ip6_max_cache_table_size; 4729f4b3ec61Sdh155122 /* 4730f4b3ec61Sdh155122 * Make sure that the table size is always a power of 2. The 4731f4b3ec61Sdh155122 * hash macro IRE_ADDR_HASH_V6() depends on that. 4732f4b3ec61Sdh155122 */ 4733f4b3ec61Sdh155122 power2_roundup(&ipst->ips_ip6_cache_table_size); 4734f4b3ec61Sdh155122 4735f4b3ec61Sdh155122 ipst->ips_ip_cache_table_v6 = kmem_zalloc( 4736f4b3ec61Sdh155122 ipst->ips_ip6_cache_table_size * sizeof (irb_t), KM_SLEEP); 4737f4b3ec61Sdh155122 4738f4b3ec61Sdh155122 for (i = 0; i < ipst->ips_ip6_cache_table_size; i++) { 4739f4b3ec61Sdh155122 rw_init(&ipst->ips_ip_cache_table_v6[i].irb_lock, NULL, 4740f4b3ec61Sdh155122 RW_DEFAULT, NULL); 4741f4b3ec61Sdh155122 } 4742f4b3ec61Sdh155122 47437c478bd9Sstevel@tonic-gate /* 47447c478bd9Sstevel@tonic-gate * Make sure that the forwarding table size is a power of 2. 47457c478bd9Sstevel@tonic-gate * The IRE*_ADDR_HASH() macroes depend on that. 47467c478bd9Sstevel@tonic-gate */ 4747f4b3ec61Sdh155122 ipst->ips_ip6_ftable_hash_size = ip6_ftable_hash_size; 4748f4b3ec61Sdh155122 power2_roundup(&ipst->ips_ip6_ftable_hash_size); 4749f4b3ec61Sdh155122 4750f4b3ec61Sdh155122 ipst->ips_ire_handle = 1; 47517c478bd9Sstevel@tonic-gate } 47527c478bd9Sstevel@tonic-gate 47537c478bd9Sstevel@tonic-gate void 4754f4b3ec61Sdh155122 ip_ire_g_fini(void) 4755f4b3ec61Sdh155122 { 4756f4b3ec61Sdh155122 kmem_cache_destroy(ire_cache); 4757f4b3ec61Sdh155122 kmem_cache_destroy(rt_entry_cache); 4758f4b3ec61Sdh155122 4759f4b3ec61Sdh155122 rn_fini(); 4760f4b3ec61Sdh155122 } 4761f4b3ec61Sdh155122 4762f4b3ec61Sdh155122 void 4763f4b3ec61Sdh155122 ip_ire_fini(ip_stack_t *ipst) 47647c478bd9Sstevel@tonic-gate { 47657c478bd9Sstevel@tonic-gate int i; 47667c478bd9Sstevel@tonic-gate 4767f4b3ec61Sdh155122 /* 4768f4b3ec61Sdh155122 * Delete all IREs - assumes that the ill/ipifs have 4769f4b3ec61Sdh155122 * been removed so what remains are just the ftable and IRE_CACHE. 4770f4b3ec61Sdh155122 */ 4771f4b3ec61Sdh155122 ire_walk(ire_delete, NULL, ipst); 4772c793af95Ssangeeta 4773f4b3ec61Sdh155122 rn_freehead(ipst->ips_ip_ftable); 4774f4b3ec61Sdh155122 ipst->ips_ip_ftable = NULL; 47757c478bd9Sstevel@tonic-gate 4776f4b3ec61Sdh155122 mutex_destroy(&ipst->ips_ire_ft_init_lock); 4777f4b3ec61Sdh155122 mutex_destroy(&ipst->ips_ire_handle_lock); 4778f4b3ec61Sdh155122 4779f4b3ec61Sdh155122 for (i = 0; i < ipst->ips_ip_cache_table_size; i++) { 4780f4b3ec61Sdh155122 ASSERT(ipst->ips_ip_cache_table[i].irb_ire == NULL); 4781f4b3ec61Sdh155122 rw_destroy(&ipst->ips_ip_cache_table[i].irb_lock); 47827c478bd9Sstevel@tonic-gate } 4783f4b3ec61Sdh155122 kmem_free(ipst->ips_ip_cache_table, 4784f4b3ec61Sdh155122 ipst->ips_ip_cache_table_size * sizeof (irb_t)); 4785f4b3ec61Sdh155122 ipst->ips_ip_cache_table = NULL; 47867c478bd9Sstevel@tonic-gate 4787f4b3ec61Sdh155122 for (i = 0; i < ipst->ips_ip6_cache_table_size; i++) { 4788f4b3ec61Sdh155122 ASSERT(ipst->ips_ip_cache_table_v6[i].irb_ire == NULL); 4789f4b3ec61Sdh155122 rw_destroy(&ipst->ips_ip_cache_table_v6[i].irb_lock); 47907c478bd9Sstevel@tonic-gate } 4791f4b3ec61Sdh155122 kmem_free(ipst->ips_ip_cache_table_v6, 4792f4b3ec61Sdh155122 ipst->ips_ip6_cache_table_size * sizeof (irb_t)); 4793f4b3ec61Sdh155122 ipst->ips_ip_cache_table_v6 = NULL; 47947c478bd9Sstevel@tonic-gate 4795f4b3ec61Sdh155122 for (i = 0; i < IP6_MASK_TABLE_SIZE; i++) { 4796f4b3ec61Sdh155122 irb_t *ptr; 4797f4b3ec61Sdh155122 int j; 4798f4b3ec61Sdh155122 4799f4b3ec61Sdh155122 if ((ptr = ipst->ips_ip_forwarding_table_v6[i]) == NULL) 4800f4b3ec61Sdh155122 continue; 4801f4b3ec61Sdh155122 4802f4b3ec61Sdh155122 for (j = 0; j < ipst->ips_ip6_ftable_hash_size; j++) { 4803f4b3ec61Sdh155122 ASSERT(ptr[j].irb_ire == NULL); 4804f4b3ec61Sdh155122 rw_destroy(&ptr[j].irb_lock); 4805f4b3ec61Sdh155122 } 4806f4b3ec61Sdh155122 mi_free(ptr); 4807f4b3ec61Sdh155122 ipst->ips_ip_forwarding_table_v6[i] = NULL; 4808f4b3ec61Sdh155122 } 48097c478bd9Sstevel@tonic-gate } 48107c478bd9Sstevel@tonic-gate 48117c478bd9Sstevel@tonic-gate /* 48127c478bd9Sstevel@tonic-gate * Check if another multirt route resolution is needed. 48137c478bd9Sstevel@tonic-gate * B_TRUE is returned is there remain a resolvable route, 48147c478bd9Sstevel@tonic-gate * or if no route for that dst is resolved yet. 48157c478bd9Sstevel@tonic-gate * B_FALSE is returned if all routes for that dst are resolved 48167c478bd9Sstevel@tonic-gate * or if the remaining unresolved routes are actually not 48177c478bd9Sstevel@tonic-gate * resolvable. 48187c478bd9Sstevel@tonic-gate * This only works in the global zone. 48197c478bd9Sstevel@tonic-gate */ 48207c478bd9Sstevel@tonic-gate boolean_t 4821f4b3ec61Sdh155122 ire_multirt_need_resolve(ipaddr_t dst, const ts_label_t *tsl, ip_stack_t *ipst) 48227c478bd9Sstevel@tonic-gate { 48237c478bd9Sstevel@tonic-gate ire_t *first_fire; 48247c478bd9Sstevel@tonic-gate ire_t *first_cire; 48257c478bd9Sstevel@tonic-gate ire_t *fire; 48267c478bd9Sstevel@tonic-gate ire_t *cire; 48277c478bd9Sstevel@tonic-gate irb_t *firb; 48287c478bd9Sstevel@tonic-gate irb_t *cirb; 48297c478bd9Sstevel@tonic-gate int unres_cnt = 0; 48307c478bd9Sstevel@tonic-gate boolean_t resolvable = B_FALSE; 48317c478bd9Sstevel@tonic-gate 48327c478bd9Sstevel@tonic-gate /* Retrieve the first IRE_HOST that matches the destination */ 48337c478bd9Sstevel@tonic-gate first_fire = ire_ftable_lookup(dst, IP_HOST_MASK, 0, IRE_HOST, NULL, 483445916cd2Sjpk NULL, ALL_ZONES, 0, tsl, 4835f4b3ec61Sdh155122 MATCH_IRE_MASK | MATCH_IRE_TYPE | MATCH_IRE_SECATTR, ipst); 48367c478bd9Sstevel@tonic-gate 48377c478bd9Sstevel@tonic-gate /* No route at all */ 48387c478bd9Sstevel@tonic-gate if (first_fire == NULL) { 48397c478bd9Sstevel@tonic-gate return (B_TRUE); 48407c478bd9Sstevel@tonic-gate } 48417c478bd9Sstevel@tonic-gate 48427c478bd9Sstevel@tonic-gate firb = first_fire->ire_bucket; 48437c478bd9Sstevel@tonic-gate ASSERT(firb != NULL); 48447c478bd9Sstevel@tonic-gate 48457c478bd9Sstevel@tonic-gate /* Retrieve the first IRE_CACHE ire for that destination. */ 4846f4b3ec61Sdh155122 first_cire = ire_cache_lookup(dst, GLOBAL_ZONEID, tsl, ipst); 48477c478bd9Sstevel@tonic-gate 48487c478bd9Sstevel@tonic-gate /* No resolved route. */ 48497c478bd9Sstevel@tonic-gate if (first_cire == NULL) { 48507c478bd9Sstevel@tonic-gate ire_refrele(first_fire); 48517c478bd9Sstevel@tonic-gate return (B_TRUE); 48527c478bd9Sstevel@tonic-gate } 48537c478bd9Sstevel@tonic-gate 48547c478bd9Sstevel@tonic-gate /* 48557c478bd9Sstevel@tonic-gate * At least one route is resolved. Here we look through the forward 48567c478bd9Sstevel@tonic-gate * and cache tables, to compare the number of declared routes 48577c478bd9Sstevel@tonic-gate * with the number of resolved routes. The search for a resolvable 48587c478bd9Sstevel@tonic-gate * route is performed only if at least one route remains 48597c478bd9Sstevel@tonic-gate * unresolved. 48607c478bd9Sstevel@tonic-gate */ 48617c478bd9Sstevel@tonic-gate cirb = first_cire->ire_bucket; 48627c478bd9Sstevel@tonic-gate ASSERT(cirb != NULL); 48637c478bd9Sstevel@tonic-gate 48647c478bd9Sstevel@tonic-gate /* Count the number of routes to that dest that are declared. */ 48657c478bd9Sstevel@tonic-gate IRB_REFHOLD(firb); 48667c478bd9Sstevel@tonic-gate for (fire = first_fire; fire != NULL; fire = fire->ire_next) { 48677c478bd9Sstevel@tonic-gate if (!(fire->ire_flags & RTF_MULTIRT)) 48687c478bd9Sstevel@tonic-gate continue; 48697c478bd9Sstevel@tonic-gate if (fire->ire_addr != dst) 48707c478bd9Sstevel@tonic-gate continue; 48717c478bd9Sstevel@tonic-gate unres_cnt++; 48727c478bd9Sstevel@tonic-gate } 48737c478bd9Sstevel@tonic-gate IRB_REFRELE(firb); 48747c478bd9Sstevel@tonic-gate 48757c478bd9Sstevel@tonic-gate /* Then subtract the number of routes to that dst that are resolved */ 48767c478bd9Sstevel@tonic-gate IRB_REFHOLD(cirb); 48777c478bd9Sstevel@tonic-gate for (cire = first_cire; cire != NULL; cire = cire->ire_next) { 48787c478bd9Sstevel@tonic-gate if (!(cire->ire_flags & RTF_MULTIRT)) 48797c478bd9Sstevel@tonic-gate continue; 48807c478bd9Sstevel@tonic-gate if (cire->ire_addr != dst) 48817c478bd9Sstevel@tonic-gate continue; 48827c478bd9Sstevel@tonic-gate if (cire->ire_marks & (IRE_MARK_CONDEMNED | IRE_MARK_HIDDEN)) 48837c478bd9Sstevel@tonic-gate continue; 48847c478bd9Sstevel@tonic-gate unres_cnt--; 48857c478bd9Sstevel@tonic-gate } 48867c478bd9Sstevel@tonic-gate IRB_REFRELE(cirb); 48877c478bd9Sstevel@tonic-gate 48887c478bd9Sstevel@tonic-gate /* At least one route is unresolved; search for a resolvable route. */ 48897c478bd9Sstevel@tonic-gate if (unres_cnt > 0) 48907c478bd9Sstevel@tonic-gate resolvable = ire_multirt_lookup(&first_cire, &first_fire, 4891f4b3ec61Sdh155122 MULTIRT_USESTAMP | MULTIRT_CACHEGW, tsl, ipst); 48927c478bd9Sstevel@tonic-gate 48937c478bd9Sstevel@tonic-gate if (first_fire != NULL) 48947c478bd9Sstevel@tonic-gate ire_refrele(first_fire); 48957c478bd9Sstevel@tonic-gate 48967c478bd9Sstevel@tonic-gate if (first_cire != NULL) 48977c478bd9Sstevel@tonic-gate ire_refrele(first_cire); 48987c478bd9Sstevel@tonic-gate 48997c478bd9Sstevel@tonic-gate return (resolvable); 49007c478bd9Sstevel@tonic-gate } 49017c478bd9Sstevel@tonic-gate 49027c478bd9Sstevel@tonic-gate 49037c478bd9Sstevel@tonic-gate /* 49047c478bd9Sstevel@tonic-gate * Explore a forward_table bucket, starting from fire_arg. 49057c478bd9Sstevel@tonic-gate * fire_arg MUST be an IRE_HOST entry. 49067c478bd9Sstevel@tonic-gate * 49077c478bd9Sstevel@tonic-gate * Return B_TRUE and update *ire_arg and *fire_arg 49087c478bd9Sstevel@tonic-gate * if at least one resolvable route is found. *ire_arg 49097c478bd9Sstevel@tonic-gate * is the IRE entry for *fire_arg's gateway. 49107c478bd9Sstevel@tonic-gate * 49117c478bd9Sstevel@tonic-gate * Return B_FALSE otherwise (all routes are resolved or 49127c478bd9Sstevel@tonic-gate * the remaining unresolved routes are all unresolvable). 49137c478bd9Sstevel@tonic-gate * 49147c478bd9Sstevel@tonic-gate * The IRE selection relies on a priority mechanism 49157c478bd9Sstevel@tonic-gate * driven by the flags passed in by the caller. 49167c478bd9Sstevel@tonic-gate * The caller, such as ip_newroute_ipif(), can get the most 49177c478bd9Sstevel@tonic-gate * relevant ire at each stage of a multiple route resolution. 49187c478bd9Sstevel@tonic-gate * 49197c478bd9Sstevel@tonic-gate * The rules are: 49207c478bd9Sstevel@tonic-gate * 49217c478bd9Sstevel@tonic-gate * - if MULTIRT_CACHEGW is specified in flags, IRE_CACHETABLE 49227c478bd9Sstevel@tonic-gate * ires are preferred for the gateway. This gives the highest 49237c478bd9Sstevel@tonic-gate * priority to routes that can be resolved without using 49247c478bd9Sstevel@tonic-gate * a resolver. 49257c478bd9Sstevel@tonic-gate * 49267c478bd9Sstevel@tonic-gate * - if MULTIRT_CACHEGW is not specified, or if MULTIRT_CACHEGW 49277c478bd9Sstevel@tonic-gate * is specified but no IRE_CACHETABLE ire entry for the gateway 49287c478bd9Sstevel@tonic-gate * is found, the following rules apply. 49297c478bd9Sstevel@tonic-gate * 49307c478bd9Sstevel@tonic-gate * - if MULTIRT_USESTAMP is specified in flags, IRE_INTERFACE 49317c478bd9Sstevel@tonic-gate * ires for the gateway, that have not been tried since 49327c478bd9Sstevel@tonic-gate * a configurable amount of time, are preferred. 49337c478bd9Sstevel@tonic-gate * This applies when a resolver must be invoked for 49347c478bd9Sstevel@tonic-gate * a missing route, but we don't want to use the resolver 49357c478bd9Sstevel@tonic-gate * upon each packet emission. If no such resolver is found, 49367c478bd9Sstevel@tonic-gate * B_FALSE is returned. 49377c478bd9Sstevel@tonic-gate * The MULTIRT_USESTAMP flag can be combined with 49387c478bd9Sstevel@tonic-gate * MULTIRT_CACHEGW. 49397c478bd9Sstevel@tonic-gate * 49407c478bd9Sstevel@tonic-gate * - if MULTIRT_USESTAMP is not specified in flags, the first 49417c478bd9Sstevel@tonic-gate * unresolved but resolvable route is selected. 49427c478bd9Sstevel@tonic-gate * 49437c478bd9Sstevel@tonic-gate * - Otherwise, there is no resolvalble route, and 49447c478bd9Sstevel@tonic-gate * B_FALSE is returned. 49457c478bd9Sstevel@tonic-gate * 49467c478bd9Sstevel@tonic-gate * At last, MULTIRT_SETSTAMP can be specified in flags to 49477c478bd9Sstevel@tonic-gate * request the timestamp of unresolvable routes to 49487c478bd9Sstevel@tonic-gate * be refreshed. This prevents the useless exploration 49497c478bd9Sstevel@tonic-gate * of those routes for a while, when MULTIRT_USESTAMP is used. 49507c478bd9Sstevel@tonic-gate * 49517c478bd9Sstevel@tonic-gate * This only works in the global zone. 49527c478bd9Sstevel@tonic-gate */ 49537c478bd9Sstevel@tonic-gate boolean_t 495445916cd2Sjpk ire_multirt_lookup(ire_t **ire_arg, ire_t **fire_arg, uint32_t flags, 4955f4b3ec61Sdh155122 const ts_label_t *tsl, ip_stack_t *ipst) 49567c478bd9Sstevel@tonic-gate { 49577c478bd9Sstevel@tonic-gate clock_t delta; 49587c478bd9Sstevel@tonic-gate ire_t *best_fire = NULL; 49597c478bd9Sstevel@tonic-gate ire_t *best_cire = NULL; 49607c478bd9Sstevel@tonic-gate ire_t *first_fire; 49617c478bd9Sstevel@tonic-gate ire_t *first_cire; 49627c478bd9Sstevel@tonic-gate ire_t *fire; 49637c478bd9Sstevel@tonic-gate ire_t *cire; 49647c478bd9Sstevel@tonic-gate irb_t *firb = NULL; 49657c478bd9Sstevel@tonic-gate irb_t *cirb = NULL; 49667c478bd9Sstevel@tonic-gate ire_t *gw_ire; 49677c478bd9Sstevel@tonic-gate boolean_t already_resolved; 49687c478bd9Sstevel@tonic-gate boolean_t res; 49697c478bd9Sstevel@tonic-gate ipaddr_t dst; 49707c478bd9Sstevel@tonic-gate ipaddr_t gw; 49717c478bd9Sstevel@tonic-gate 49727c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: *ire_arg %p, *fire_arg %p, flags %04x\n", 49737c478bd9Sstevel@tonic-gate (void *)*ire_arg, (void *)*fire_arg, flags)); 49747c478bd9Sstevel@tonic-gate 49757c478bd9Sstevel@tonic-gate ASSERT(ire_arg != NULL); 49767c478bd9Sstevel@tonic-gate ASSERT(fire_arg != NULL); 49777c478bd9Sstevel@tonic-gate 49787c478bd9Sstevel@tonic-gate /* Not an IRE_HOST ire; give up. */ 49797c478bd9Sstevel@tonic-gate if ((*fire_arg == NULL) || ((*fire_arg)->ire_type != IRE_HOST)) { 49807c478bd9Sstevel@tonic-gate return (B_FALSE); 49817c478bd9Sstevel@tonic-gate } 49827c478bd9Sstevel@tonic-gate 49837c478bd9Sstevel@tonic-gate /* This is the first IRE_HOST ire for that destination. */ 49847c478bd9Sstevel@tonic-gate first_fire = *fire_arg; 49857c478bd9Sstevel@tonic-gate firb = first_fire->ire_bucket; 49867c478bd9Sstevel@tonic-gate ASSERT(firb != NULL); 49877c478bd9Sstevel@tonic-gate 49887c478bd9Sstevel@tonic-gate dst = first_fire->ire_addr; 49897c478bd9Sstevel@tonic-gate 49907c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: dst %08x\n", ntohl(dst))); 49917c478bd9Sstevel@tonic-gate 49927c478bd9Sstevel@tonic-gate /* 49937c478bd9Sstevel@tonic-gate * Retrieve the first IRE_CACHE ire for that destination; 49947c478bd9Sstevel@tonic-gate * if we don't find one, no route for that dest is 49957c478bd9Sstevel@tonic-gate * resolved yet. 49967c478bd9Sstevel@tonic-gate */ 4997f4b3ec61Sdh155122 first_cire = ire_cache_lookup(dst, GLOBAL_ZONEID, tsl, ipst); 49987c478bd9Sstevel@tonic-gate if (first_cire != NULL) { 49997c478bd9Sstevel@tonic-gate cirb = first_cire->ire_bucket; 50007c478bd9Sstevel@tonic-gate } 50017c478bd9Sstevel@tonic-gate 50027c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: first_cire %p\n", (void *)first_cire)); 50037c478bd9Sstevel@tonic-gate 50047c478bd9Sstevel@tonic-gate /* 50057c478bd9Sstevel@tonic-gate * Search for a resolvable route, giving the top priority 50067c478bd9Sstevel@tonic-gate * to routes that can be resolved without any call to the resolver. 50077c478bd9Sstevel@tonic-gate */ 50087c478bd9Sstevel@tonic-gate IRB_REFHOLD(firb); 50097c478bd9Sstevel@tonic-gate 50107c478bd9Sstevel@tonic-gate if (!CLASSD(dst)) { 50117c478bd9Sstevel@tonic-gate /* 50127c478bd9Sstevel@tonic-gate * For all multiroute IRE_HOST ires for that destination, 50137c478bd9Sstevel@tonic-gate * check if the route via the IRE_HOST's gateway is 50147c478bd9Sstevel@tonic-gate * resolved yet. 50157c478bd9Sstevel@tonic-gate */ 50167c478bd9Sstevel@tonic-gate for (fire = first_fire; fire != NULL; fire = fire->ire_next) { 50177c478bd9Sstevel@tonic-gate 50187c478bd9Sstevel@tonic-gate if (!(fire->ire_flags & RTF_MULTIRT)) 50197c478bd9Sstevel@tonic-gate continue; 50207c478bd9Sstevel@tonic-gate if (fire->ire_addr != dst) 50217c478bd9Sstevel@tonic-gate continue; 50227c478bd9Sstevel@tonic-gate 502345916cd2Sjpk if (fire->ire_gw_secattr != NULL && 502445916cd2Sjpk tsol_ire_match_gwattr(fire, tsl) != 0) { 502545916cd2Sjpk continue; 502645916cd2Sjpk } 502745916cd2Sjpk 50287c478bd9Sstevel@tonic-gate gw = fire->ire_gateway_addr; 50297c478bd9Sstevel@tonic-gate 50307c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: fire %p, " 50317c478bd9Sstevel@tonic-gate "ire_addr %08x, ire_gateway_addr %08x\n", 50327c478bd9Sstevel@tonic-gate (void *)fire, ntohl(fire->ire_addr), ntohl(gw))); 50337c478bd9Sstevel@tonic-gate 50347c478bd9Sstevel@tonic-gate already_resolved = B_FALSE; 50357c478bd9Sstevel@tonic-gate 50367c478bd9Sstevel@tonic-gate if (first_cire != NULL) { 50377c478bd9Sstevel@tonic-gate ASSERT(cirb != NULL); 50387c478bd9Sstevel@tonic-gate 50397c478bd9Sstevel@tonic-gate IRB_REFHOLD(cirb); 50407c478bd9Sstevel@tonic-gate /* 50417c478bd9Sstevel@tonic-gate * For all IRE_CACHE ires for that 50427c478bd9Sstevel@tonic-gate * destination. 50437c478bd9Sstevel@tonic-gate */ 50447c478bd9Sstevel@tonic-gate for (cire = first_cire; 50457c478bd9Sstevel@tonic-gate cire != NULL; 50467c478bd9Sstevel@tonic-gate cire = cire->ire_next) { 50477c478bd9Sstevel@tonic-gate 50487c478bd9Sstevel@tonic-gate if (!(cire->ire_flags & RTF_MULTIRT)) 50497c478bd9Sstevel@tonic-gate continue; 50507c478bd9Sstevel@tonic-gate if (cire->ire_addr != dst) 50517c478bd9Sstevel@tonic-gate continue; 50527c478bd9Sstevel@tonic-gate if (cire->ire_marks & 50537c478bd9Sstevel@tonic-gate (IRE_MARK_CONDEMNED | 50547c478bd9Sstevel@tonic-gate IRE_MARK_HIDDEN)) 50557c478bd9Sstevel@tonic-gate continue; 505645916cd2Sjpk 505745916cd2Sjpk if (cire->ire_gw_secattr != NULL && 505845916cd2Sjpk tsol_ire_match_gwattr(cire, 505945916cd2Sjpk tsl) != 0) { 506045916cd2Sjpk continue; 506145916cd2Sjpk } 506245916cd2Sjpk 50637c478bd9Sstevel@tonic-gate /* 50647c478bd9Sstevel@tonic-gate * Check if the IRE_CACHE's gateway 50657c478bd9Sstevel@tonic-gate * matches the IRE_HOST's gateway. 50667c478bd9Sstevel@tonic-gate */ 50677c478bd9Sstevel@tonic-gate if (cire->ire_gateway_addr == gw) { 50687c478bd9Sstevel@tonic-gate already_resolved = B_TRUE; 50697c478bd9Sstevel@tonic-gate break; 50707c478bd9Sstevel@tonic-gate } 50717c478bd9Sstevel@tonic-gate } 50727c478bd9Sstevel@tonic-gate IRB_REFRELE(cirb); 50737c478bd9Sstevel@tonic-gate } 50747c478bd9Sstevel@tonic-gate 50757c478bd9Sstevel@tonic-gate /* 50767c478bd9Sstevel@tonic-gate * This route is already resolved; 50777c478bd9Sstevel@tonic-gate * proceed with next one. 50787c478bd9Sstevel@tonic-gate */ 50797c478bd9Sstevel@tonic-gate if (already_resolved) { 50807c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: found cire %p, " 50817c478bd9Sstevel@tonic-gate "already resolved\n", (void *)cire)); 50827c478bd9Sstevel@tonic-gate continue; 50837c478bd9Sstevel@tonic-gate } 50847c478bd9Sstevel@tonic-gate 50857c478bd9Sstevel@tonic-gate /* 50867c478bd9Sstevel@tonic-gate * The route is unresolved; is it actually 50877c478bd9Sstevel@tonic-gate * resolvable, i.e. is there a cache or a resolver 50887c478bd9Sstevel@tonic-gate * for the gateway? 50897c478bd9Sstevel@tonic-gate */ 50907c478bd9Sstevel@tonic-gate gw_ire = ire_route_lookup(gw, 0, 0, 0, NULL, NULL, 509145916cd2Sjpk ALL_ZONES, tsl, 5092f4b3ec61Sdh155122 MATCH_IRE_RECURSIVE | MATCH_IRE_SECATTR, ipst); 50937c478bd9Sstevel@tonic-gate 50947c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: looked up gw_ire %p\n", 50957c478bd9Sstevel@tonic-gate (void *)gw_ire)); 50967c478bd9Sstevel@tonic-gate 50977c478bd9Sstevel@tonic-gate /* 50987c478bd9Sstevel@tonic-gate * If gw_ire is typed IRE_CACHETABLE, 50997c478bd9Sstevel@tonic-gate * this route can be resolved without any call to the 51007c478bd9Sstevel@tonic-gate * resolver. If the MULTIRT_CACHEGW flag is set, 51017c478bd9Sstevel@tonic-gate * give the top priority to this ire and exit the 51027c478bd9Sstevel@tonic-gate * loop. 51037c478bd9Sstevel@tonic-gate * This is typically the case when an ARP reply 51047c478bd9Sstevel@tonic-gate * is processed through ip_wput_nondata(). 51057c478bd9Sstevel@tonic-gate */ 51067c478bd9Sstevel@tonic-gate if ((flags & MULTIRT_CACHEGW) && 51077c478bd9Sstevel@tonic-gate (gw_ire != NULL) && 51087c478bd9Sstevel@tonic-gate (gw_ire->ire_type & IRE_CACHETABLE)) { 5109c793af95Ssangeeta ASSERT(gw_ire->ire_nce == NULL || 5110c793af95Ssangeeta gw_ire->ire_nce->nce_state == ND_REACHABLE); 51117c478bd9Sstevel@tonic-gate /* 51127c478bd9Sstevel@tonic-gate * Release the resolver associated to the 51137c478bd9Sstevel@tonic-gate * previous candidate best ire, if any. 51147c478bd9Sstevel@tonic-gate */ 51157c478bd9Sstevel@tonic-gate if (best_cire != NULL) { 51167c478bd9Sstevel@tonic-gate ire_refrele(best_cire); 51177c478bd9Sstevel@tonic-gate ASSERT(best_fire != NULL); 51187c478bd9Sstevel@tonic-gate } 51197c478bd9Sstevel@tonic-gate 51207c478bd9Sstevel@tonic-gate best_fire = fire; 51217c478bd9Sstevel@tonic-gate best_cire = gw_ire; 51227c478bd9Sstevel@tonic-gate 51237c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: found top prio " 51247c478bd9Sstevel@tonic-gate "best_fire %p, best_cire %p\n", 51257c478bd9Sstevel@tonic-gate (void *)best_fire, (void *)best_cire)); 51267c478bd9Sstevel@tonic-gate break; 51277c478bd9Sstevel@tonic-gate } 51287c478bd9Sstevel@tonic-gate 51297c478bd9Sstevel@tonic-gate /* 51307c478bd9Sstevel@tonic-gate * Compute the time elapsed since our preceding 51317c478bd9Sstevel@tonic-gate * attempt to resolve that route. 51327c478bd9Sstevel@tonic-gate * If the MULTIRT_USESTAMP flag is set, we take that 51337c478bd9Sstevel@tonic-gate * route into account only if this time interval 51347c478bd9Sstevel@tonic-gate * exceeds ip_multirt_resolution_interval; 51357c478bd9Sstevel@tonic-gate * this prevents us from attempting to resolve a 51367c478bd9Sstevel@tonic-gate * broken route upon each sending of a packet. 51377c478bd9Sstevel@tonic-gate */ 51387c478bd9Sstevel@tonic-gate delta = lbolt - fire->ire_last_used_time; 51397c478bd9Sstevel@tonic-gate delta = TICK_TO_MSEC(delta); 51407c478bd9Sstevel@tonic-gate 5141f4b3ec61Sdh155122 res = (boolean_t)((delta > 5142f4b3ec61Sdh155122 ipst->ips_ip_multirt_resolution_interval) || 51437c478bd9Sstevel@tonic-gate (!(flags & MULTIRT_USESTAMP))); 51447c478bd9Sstevel@tonic-gate 51457c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: fire %p, delta %lu, " 51467c478bd9Sstevel@tonic-gate "res %d\n", 51477c478bd9Sstevel@tonic-gate (void *)fire, delta, res)); 51487c478bd9Sstevel@tonic-gate 51497c478bd9Sstevel@tonic-gate if (res) { 51507c478bd9Sstevel@tonic-gate /* 51517c478bd9Sstevel@tonic-gate * We are here if MULTIRT_USESTAMP flag is set 51527c478bd9Sstevel@tonic-gate * and the resolver for fire's gateway 51537c478bd9Sstevel@tonic-gate * has not been tried since 51547c478bd9Sstevel@tonic-gate * ip_multirt_resolution_interval, or if 51557c478bd9Sstevel@tonic-gate * MULTIRT_USESTAMP is not set but gw_ire did 51567c478bd9Sstevel@tonic-gate * not fill the conditions for MULTIRT_CACHEGW, 51577c478bd9Sstevel@tonic-gate * or if neither MULTIRT_USESTAMP nor 51587c478bd9Sstevel@tonic-gate * MULTIRT_CACHEGW are set. 51597c478bd9Sstevel@tonic-gate */ 51607c478bd9Sstevel@tonic-gate if (gw_ire != NULL) { 51617c478bd9Sstevel@tonic-gate if (best_fire == NULL) { 51627c478bd9Sstevel@tonic-gate ASSERT(best_cire == NULL); 51637c478bd9Sstevel@tonic-gate 51647c478bd9Sstevel@tonic-gate best_fire = fire; 51657c478bd9Sstevel@tonic-gate best_cire = gw_ire; 51667c478bd9Sstevel@tonic-gate 51677c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup:" 51687c478bd9Sstevel@tonic-gate "found candidate " 51697c478bd9Sstevel@tonic-gate "best_fire %p, " 51707c478bd9Sstevel@tonic-gate "best_cire %p\n", 51717c478bd9Sstevel@tonic-gate (void *)best_fire, 51727c478bd9Sstevel@tonic-gate (void *)best_cire)); 51737c478bd9Sstevel@tonic-gate 51747c478bd9Sstevel@tonic-gate /* 51757c478bd9Sstevel@tonic-gate * If MULTIRT_CACHEGW is not 51767c478bd9Sstevel@tonic-gate * set, we ignore the top 51777c478bd9Sstevel@tonic-gate * priority ires that can 51787c478bd9Sstevel@tonic-gate * be resolved without any 51797c478bd9Sstevel@tonic-gate * call to the resolver; 51807c478bd9Sstevel@tonic-gate * In that case, there is 51817c478bd9Sstevel@tonic-gate * actually no need 51827c478bd9Sstevel@tonic-gate * to continue the loop. 51837c478bd9Sstevel@tonic-gate */ 51847c478bd9Sstevel@tonic-gate if (!(flags & 51857c478bd9Sstevel@tonic-gate MULTIRT_CACHEGW)) { 51867c478bd9Sstevel@tonic-gate break; 51877c478bd9Sstevel@tonic-gate } 51887c478bd9Sstevel@tonic-gate continue; 51897c478bd9Sstevel@tonic-gate } 51907c478bd9Sstevel@tonic-gate } else { 51917c478bd9Sstevel@tonic-gate /* 51927c478bd9Sstevel@tonic-gate * No resolver for the gateway: the 51937c478bd9Sstevel@tonic-gate * route is not resolvable. 51947c478bd9Sstevel@tonic-gate * If the MULTIRT_SETSTAMP flag is 51957c478bd9Sstevel@tonic-gate * set, we stamp the IRE_HOST ire, 51967c478bd9Sstevel@tonic-gate * so we will not select it again 51977c478bd9Sstevel@tonic-gate * during this resolution interval. 51987c478bd9Sstevel@tonic-gate */ 51997c478bd9Sstevel@tonic-gate if (flags & MULTIRT_SETSTAMP) 52007c478bd9Sstevel@tonic-gate fire->ire_last_used_time = 52017c478bd9Sstevel@tonic-gate lbolt; 52027c478bd9Sstevel@tonic-gate } 52037c478bd9Sstevel@tonic-gate } 52047c478bd9Sstevel@tonic-gate 52057c478bd9Sstevel@tonic-gate if (gw_ire != NULL) 52067c478bd9Sstevel@tonic-gate ire_refrele(gw_ire); 52077c478bd9Sstevel@tonic-gate } 52087c478bd9Sstevel@tonic-gate } else { /* CLASSD(dst) */ 52097c478bd9Sstevel@tonic-gate 52107c478bd9Sstevel@tonic-gate for (fire = first_fire; 52117c478bd9Sstevel@tonic-gate fire != NULL; 52127c478bd9Sstevel@tonic-gate fire = fire->ire_next) { 52137c478bd9Sstevel@tonic-gate 52147c478bd9Sstevel@tonic-gate if (!(fire->ire_flags & RTF_MULTIRT)) 52157c478bd9Sstevel@tonic-gate continue; 52167c478bd9Sstevel@tonic-gate if (fire->ire_addr != dst) 52177c478bd9Sstevel@tonic-gate continue; 52187c478bd9Sstevel@tonic-gate 521945916cd2Sjpk if (fire->ire_gw_secattr != NULL && 522045916cd2Sjpk tsol_ire_match_gwattr(fire, tsl) != 0) { 522145916cd2Sjpk continue; 522245916cd2Sjpk } 522345916cd2Sjpk 52247c478bd9Sstevel@tonic-gate already_resolved = B_FALSE; 52257c478bd9Sstevel@tonic-gate 52267c478bd9Sstevel@tonic-gate gw = fire->ire_gateway_addr; 52277c478bd9Sstevel@tonic-gate 52287c478bd9Sstevel@tonic-gate gw_ire = ire_ftable_lookup(gw, 0, 0, IRE_INTERFACE, 522945916cd2Sjpk NULL, NULL, ALL_ZONES, 0, tsl, 523045916cd2Sjpk MATCH_IRE_RECURSIVE | MATCH_IRE_TYPE | 5231f4b3ec61Sdh155122 MATCH_IRE_SECATTR, ipst); 52327c478bd9Sstevel@tonic-gate 52337c478bd9Sstevel@tonic-gate /* No resolver for the gateway; we skip this ire. */ 52347c478bd9Sstevel@tonic-gate if (gw_ire == NULL) { 52357c478bd9Sstevel@tonic-gate continue; 52367c478bd9Sstevel@tonic-gate } 5237c793af95Ssangeeta ASSERT(gw_ire->ire_nce == NULL || 5238c793af95Ssangeeta gw_ire->ire_nce->nce_state == ND_REACHABLE); 52397c478bd9Sstevel@tonic-gate 52407c478bd9Sstevel@tonic-gate if (first_cire != NULL) { 52417c478bd9Sstevel@tonic-gate 52427c478bd9Sstevel@tonic-gate IRB_REFHOLD(cirb); 52437c478bd9Sstevel@tonic-gate /* 52447c478bd9Sstevel@tonic-gate * For all IRE_CACHE ires for that 52457c478bd9Sstevel@tonic-gate * destination. 52467c478bd9Sstevel@tonic-gate */ 52477c478bd9Sstevel@tonic-gate for (cire = first_cire; 52487c478bd9Sstevel@tonic-gate cire != NULL; 52497c478bd9Sstevel@tonic-gate cire = cire->ire_next) { 52507c478bd9Sstevel@tonic-gate 52517c478bd9Sstevel@tonic-gate if (!(cire->ire_flags & RTF_MULTIRT)) 52527c478bd9Sstevel@tonic-gate continue; 52537c478bd9Sstevel@tonic-gate if (cire->ire_addr != dst) 52547c478bd9Sstevel@tonic-gate continue; 52557c478bd9Sstevel@tonic-gate if (cire->ire_marks & 52567c478bd9Sstevel@tonic-gate (IRE_MARK_CONDEMNED | 52577c478bd9Sstevel@tonic-gate IRE_MARK_HIDDEN)) 52587c478bd9Sstevel@tonic-gate continue; 52597c478bd9Sstevel@tonic-gate 526045916cd2Sjpk if (cire->ire_gw_secattr != NULL && 526145916cd2Sjpk tsol_ire_match_gwattr(cire, 526245916cd2Sjpk tsl) != 0) { 526345916cd2Sjpk continue; 526445916cd2Sjpk } 526545916cd2Sjpk 52667c478bd9Sstevel@tonic-gate /* 52677c478bd9Sstevel@tonic-gate * Cache entries are linked to the 52687c478bd9Sstevel@tonic-gate * parent routes using the parent handle 52697c478bd9Sstevel@tonic-gate * (ire_phandle). If no cache entry has 52707c478bd9Sstevel@tonic-gate * the same handle as fire, fire is 52717c478bd9Sstevel@tonic-gate * still unresolved. 52727c478bd9Sstevel@tonic-gate */ 52737c478bd9Sstevel@tonic-gate ASSERT(cire->ire_phandle != 0); 52747c478bd9Sstevel@tonic-gate if (cire->ire_phandle == 52757c478bd9Sstevel@tonic-gate fire->ire_phandle) { 52767c478bd9Sstevel@tonic-gate already_resolved = B_TRUE; 52777c478bd9Sstevel@tonic-gate break; 52787c478bd9Sstevel@tonic-gate } 52797c478bd9Sstevel@tonic-gate } 52807c478bd9Sstevel@tonic-gate IRB_REFRELE(cirb); 52817c478bd9Sstevel@tonic-gate } 52827c478bd9Sstevel@tonic-gate 52837c478bd9Sstevel@tonic-gate /* 52847c478bd9Sstevel@tonic-gate * This route is already resolved; proceed with 52857c478bd9Sstevel@tonic-gate * next one. 52867c478bd9Sstevel@tonic-gate */ 52877c478bd9Sstevel@tonic-gate if (already_resolved) { 52887c478bd9Sstevel@tonic-gate ire_refrele(gw_ire); 52897c478bd9Sstevel@tonic-gate continue; 52907c478bd9Sstevel@tonic-gate } 52917c478bd9Sstevel@tonic-gate 52927c478bd9Sstevel@tonic-gate /* 52937c478bd9Sstevel@tonic-gate * Compute the time elapsed since our preceding 52947c478bd9Sstevel@tonic-gate * attempt to resolve that route. 52957c478bd9Sstevel@tonic-gate * If the MULTIRT_USESTAMP flag is set, we take 52967c478bd9Sstevel@tonic-gate * that route into account only if this time 52977c478bd9Sstevel@tonic-gate * interval exceeds ip_multirt_resolution_interval; 52987c478bd9Sstevel@tonic-gate * this prevents us from attempting to resolve a 52997c478bd9Sstevel@tonic-gate * broken route upon each sending of a packet. 53007c478bd9Sstevel@tonic-gate */ 53017c478bd9Sstevel@tonic-gate delta = lbolt - fire->ire_last_used_time; 53027c478bd9Sstevel@tonic-gate delta = TICK_TO_MSEC(delta); 53037c478bd9Sstevel@tonic-gate 5304f4b3ec61Sdh155122 res = (boolean_t)((delta > 5305f4b3ec61Sdh155122 ipst->ips_ip_multirt_resolution_interval) || 53067c478bd9Sstevel@tonic-gate (!(flags & MULTIRT_USESTAMP))); 53077c478bd9Sstevel@tonic-gate 53087c478bd9Sstevel@tonic-gate ip3dbg(("ire_multirt_lookup: fire %p, delta %lx, " 53097c478bd9Sstevel@tonic-gate "flags %04x, res %d\n", 53107c478bd9Sstevel@tonic-gate (void *)fire, delta, flags, res)); 53117c478bd9Sstevel@tonic-gate 53127c478bd9Sstevel@tonic-gate if (res) { 53137c478bd9Sstevel@tonic-gate if (best_cire != NULL) { 53147c478bd9Sstevel@tonic-gate /* 53157c478bd9Sstevel@tonic-gate * Release the resolver associated 53167c478bd9Sstevel@tonic-gate * to the preceding candidate best 53177c478bd9Sstevel@tonic-gate * ire, if any. 53187c478bd9Sstevel@tonic-gate */ 53197c478bd9Sstevel@tonic-gate ire_refrele(best_cire); 53207c478bd9Sstevel@tonic-gate ASSERT(best_fire != NULL); 53217c478bd9Sstevel@tonic-gate } 53227c478bd9Sstevel@tonic-gate best_fire = fire; 53237c478bd9Sstevel@tonic-gate best_cire = gw_ire; 53247c478bd9Sstevel@tonic-gate continue; 53257c478bd9Sstevel@tonic-gate } 53267c478bd9Sstevel@tonic-gate 53277c478bd9Sstevel@tonic-gate ire_refrele(gw_ire); 53287c478bd9Sstevel@tonic-gate } 53297c478bd9Sstevel@tonic-gate } 53307c478bd9Sstevel@tonic-gate 53317c478bd9Sstevel@tonic-gate if (best_fire != NULL) { 53327c478bd9Sstevel@tonic-gate IRE_REFHOLD(best_fire); 53337c478bd9Sstevel@tonic-gate } 53347c478bd9Sstevel@tonic-gate IRB_REFRELE(firb); 53357c478bd9Sstevel@tonic-gate 53367c478bd9Sstevel@tonic-gate /* Release the first IRE_CACHE we initially looked up, if any. */ 53377c478bd9Sstevel@tonic-gate if (first_cire != NULL) 53387c478bd9Sstevel@tonic-gate ire_refrele(first_cire); 53397c478bd9Sstevel@tonic-gate 53407c478bd9Sstevel@tonic-gate /* Found a resolvable route. */ 53417c478bd9Sstevel@tonic-gate if (best_fire != NULL) { 53427c478bd9Sstevel@tonic-gate ASSERT(best_cire != NULL); 53437c478bd9Sstevel@tonic-gate 53447c478bd9Sstevel@tonic-gate if (*fire_arg != NULL) 53457c478bd9Sstevel@tonic-gate ire_refrele(*fire_arg); 53467c478bd9Sstevel@tonic-gate if (*ire_arg != NULL) 53477c478bd9Sstevel@tonic-gate ire_refrele(*ire_arg); 53487c478bd9Sstevel@tonic-gate 53497c478bd9Sstevel@tonic-gate /* 53507c478bd9Sstevel@tonic-gate * Update the passed-in arguments with the 53517c478bd9Sstevel@tonic-gate * resolvable multirt route we found. 53527c478bd9Sstevel@tonic-gate */ 53537c478bd9Sstevel@tonic-gate *fire_arg = best_fire; 53547c478bd9Sstevel@tonic-gate *ire_arg = best_cire; 53557c478bd9Sstevel@tonic-gate 53567c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: returning B_TRUE, " 53577c478bd9Sstevel@tonic-gate "*fire_arg %p, *ire_arg %p\n", 53587c478bd9Sstevel@tonic-gate (void *)best_fire, (void *)best_cire)); 53597c478bd9Sstevel@tonic-gate 53607c478bd9Sstevel@tonic-gate return (B_TRUE); 53617c478bd9Sstevel@tonic-gate } 53627c478bd9Sstevel@tonic-gate 53637c478bd9Sstevel@tonic-gate ASSERT(best_cire == NULL); 53647c478bd9Sstevel@tonic-gate 53657c478bd9Sstevel@tonic-gate ip2dbg(("ire_multirt_lookup: returning B_FALSE, *fire_arg %p, " 53667c478bd9Sstevel@tonic-gate "*ire_arg %p\n", 53677c478bd9Sstevel@tonic-gate (void *)*fire_arg, (void *)*ire_arg)); 53687c478bd9Sstevel@tonic-gate 53697c478bd9Sstevel@tonic-gate /* No resolvable route. */ 53707c478bd9Sstevel@tonic-gate return (B_FALSE); 53717c478bd9Sstevel@tonic-gate } 53727c478bd9Sstevel@tonic-gate 53737c478bd9Sstevel@tonic-gate /* 53747c478bd9Sstevel@tonic-gate * IRE iterator for inbound and loopback broadcast processing. 53757c478bd9Sstevel@tonic-gate * Given an IRE_BROADCAST ire, walk the ires with the same destination 53767c478bd9Sstevel@tonic-gate * address, but skip over the passed-in ire. Returns the next ire without 53777c478bd9Sstevel@tonic-gate * a hold - assumes that the caller holds a reference on the IRE bucket. 53787c478bd9Sstevel@tonic-gate */ 53797c478bd9Sstevel@tonic-gate ire_t * 53807c478bd9Sstevel@tonic-gate ire_get_next_bcast_ire(ire_t *curr, ire_t *ire) 53817c478bd9Sstevel@tonic-gate { 53827c478bd9Sstevel@tonic-gate ill_t *ill; 53837c478bd9Sstevel@tonic-gate 53847c478bd9Sstevel@tonic-gate if (curr == NULL) { 53857c478bd9Sstevel@tonic-gate for (curr = ire->ire_bucket->irb_ire; curr != NULL; 53867c478bd9Sstevel@tonic-gate curr = curr->ire_next) { 53877c478bd9Sstevel@tonic-gate if (curr->ire_addr == ire->ire_addr) 53887c478bd9Sstevel@tonic-gate break; 53897c478bd9Sstevel@tonic-gate } 53907c478bd9Sstevel@tonic-gate } else { 53917c478bd9Sstevel@tonic-gate curr = curr->ire_next; 53927c478bd9Sstevel@tonic-gate } 53937c478bd9Sstevel@tonic-gate ill = ire_to_ill(ire); 53947c478bd9Sstevel@tonic-gate for (; curr != NULL; curr = curr->ire_next) { 53957c478bd9Sstevel@tonic-gate if (curr->ire_addr != ire->ire_addr) { 53967c478bd9Sstevel@tonic-gate /* 53977c478bd9Sstevel@tonic-gate * All the IREs to a given destination are contiguous; 53987c478bd9Sstevel@tonic-gate * break out once the address doesn't match. 53997c478bd9Sstevel@tonic-gate */ 54007c478bd9Sstevel@tonic-gate break; 54017c478bd9Sstevel@tonic-gate } 54027c478bd9Sstevel@tonic-gate if (curr == ire) { 54037c478bd9Sstevel@tonic-gate /* skip over the passed-in ire */ 54047c478bd9Sstevel@tonic-gate continue; 54057c478bd9Sstevel@tonic-gate } 54067c478bd9Sstevel@tonic-gate if ((curr->ire_stq != NULL && ire->ire_stq == NULL) || 54077c478bd9Sstevel@tonic-gate (curr->ire_stq == NULL && ire->ire_stq != NULL)) { 54087c478bd9Sstevel@tonic-gate /* 54097c478bd9Sstevel@tonic-gate * If the passed-in ire is loopback, skip over 54107c478bd9Sstevel@tonic-gate * non-loopback ires and vice versa. 54117c478bd9Sstevel@tonic-gate */ 54127c478bd9Sstevel@tonic-gate continue; 54137c478bd9Sstevel@tonic-gate } 54147c478bd9Sstevel@tonic-gate if (ire_to_ill(curr) != ill) { 54157c478bd9Sstevel@tonic-gate /* skip over IREs going through a different interface */ 54167c478bd9Sstevel@tonic-gate continue; 54177c478bd9Sstevel@tonic-gate } 54187c478bd9Sstevel@tonic-gate if (curr->ire_marks & IRE_MARK_CONDEMNED) { 54197c478bd9Sstevel@tonic-gate /* skip over deleted IREs */ 54207c478bd9Sstevel@tonic-gate continue; 54217c478bd9Sstevel@tonic-gate } 54227c478bd9Sstevel@tonic-gate return (curr); 54237c478bd9Sstevel@tonic-gate } 54247c478bd9Sstevel@tonic-gate return (NULL); 54257c478bd9Sstevel@tonic-gate } 54267c478bd9Sstevel@tonic-gate 5427*6a8288c7Scarlsonj #ifdef DEBUG 54287c478bd9Sstevel@tonic-gate void 54297c478bd9Sstevel@tonic-gate ire_trace_ref(ire_t *ire) 54307c478bd9Sstevel@tonic-gate { 54317c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 5432*6a8288c7Scarlsonj if (ire->ire_trace_disable) { 54337c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 54347c478bd9Sstevel@tonic-gate return; 54357c478bd9Sstevel@tonic-gate } 5436*6a8288c7Scarlsonj 5437*6a8288c7Scarlsonj if (th_trace_ref(ire, ire->ire_ipst)) { 5438*6a8288c7Scarlsonj mutex_exit(&ire->ire_lock); 5439*6a8288c7Scarlsonj } else { 54407c478bd9Sstevel@tonic-gate ire->ire_trace_disable = B_TRUE; 54417c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 5442*6a8288c7Scarlsonj ire_trace_cleanup(ire); 54437c478bd9Sstevel@tonic-gate } 54447c478bd9Sstevel@tonic-gate } 54457c478bd9Sstevel@tonic-gate 54467c478bd9Sstevel@tonic-gate void 54477c478bd9Sstevel@tonic-gate ire_untrace_ref(ire_t *ire) 54487c478bd9Sstevel@tonic-gate { 54497c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 5450*6a8288c7Scarlsonj if (!ire->ire_trace_disable) 5451*6a8288c7Scarlsonj th_trace_unref(ire); 54527c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 54537c478bd9Sstevel@tonic-gate } 54547c478bd9Sstevel@tonic-gate 54557c478bd9Sstevel@tonic-gate static void 5456*6a8288c7Scarlsonj ire_trace_cleanup(const ire_t *ire) 54577c478bd9Sstevel@tonic-gate { 5458*6a8288c7Scarlsonj th_trace_cleanup(ire, ire->ire_trace_disable); 54597c478bd9Sstevel@tonic-gate } 5460*6a8288c7Scarlsonj #endif /* DEBUG */ 5461c793af95Ssangeeta 5462c793af95Ssangeeta /* 5463c793af95Ssangeeta * Generate a message chain with an arp request to resolve the in_ire. 5464c793af95Ssangeeta * It is assumed that in_ire itself is currently in the ire cache table, 5465c793af95Ssangeeta * so we create a fake_ire filled with enough information about ire_addr etc. 5466c793af95Ssangeeta * to retrieve in_ire when the DL_UNITDATA response from the resolver 5467c793af95Ssangeeta * comes back. The fake_ire itself is created by calling esballoc with 5468c793af95Ssangeeta * the fr_rtnp (free routine) set to ire_freemblk. This routine will be 5469c793af95Ssangeeta * invoked when the mblk containing fake_ire is freed. 5470c793af95Ssangeeta */ 5471c793af95Ssangeeta void 5472c793af95Ssangeeta ire_arpresolve(ire_t *in_ire, ill_t *dst_ill) 5473c793af95Ssangeeta { 5474c793af95Ssangeeta areq_t *areq; 5475c793af95Ssangeeta ipaddr_t *addrp; 547654da8755Ssowmini mblk_t *ire_mp, *areq_mp; 5477c793af95Ssangeeta ire_t *ire, *buf; 5478c793af95Ssangeeta size_t bufsize; 5479c793af95Ssangeeta frtn_t *frtnp; 5480c793af95Ssangeeta ill_t *ill; 5481f4b3ec61Sdh155122 ip_stack_t *ipst = dst_ill->ill_ipst; 5482c793af95Ssangeeta 5483c793af95Ssangeeta /* 5484c793af95Ssangeeta * Construct message chain for the resolver 5485c793af95Ssangeeta * of the form: 5486c793af95Ssangeeta * ARP_REQ_MBLK-->IRE_MBLK 5487c793af95Ssangeeta * 5488c793af95Ssangeeta * NOTE : If the response does not 5489c793af95Ssangeeta * come back, ARP frees the packet. For this reason, 5490c793af95Ssangeeta * we can't REFHOLD the bucket of save_ire to prevent 5491c793af95Ssangeeta * deletions. We may not be able to REFRELE the bucket 5492c793af95Ssangeeta * if the response never comes back. Thus, before 5493c793af95Ssangeeta * adding the ire, ire_add_v4 will make sure that the 5494c793af95Ssangeeta * interface route does not get deleted. This is the 5495c793af95Ssangeeta * only case unlike ip_newroute_v6, ip_newroute_ipif_v6 5496c793af95Ssangeeta * where we can always prevent deletions because of 5497c793af95Ssangeeta * the synchronous nature of adding IRES i.e 5498c793af95Ssangeeta * ire_add_then_send is called after creating the IRE. 5499c793af95Ssangeeta */ 5500c793af95Ssangeeta 5501c793af95Ssangeeta /* 5502c793af95Ssangeeta * We use esballoc to allocate the second part(the ire_t size mblk) 5503c793af95Ssangeeta * of the message chain depicted above. THis mblk will be freed 5504c793af95Ssangeeta * by arp when there is a timeout, and otherwise passed to IP 5505c793af95Ssangeeta * and IP will * free it after processing the ARP response. 5506c793af95Ssangeeta */ 5507c793af95Ssangeeta 5508c793af95Ssangeeta bufsize = sizeof (ire_t) + sizeof (frtn_t); 5509c793af95Ssangeeta buf = kmem_alloc(bufsize, KM_NOSLEEP); 5510c793af95Ssangeeta if (buf == NULL) { 5511c793af95Ssangeeta ip1dbg(("ire_arpresolver:alloc buffer failed\n ")); 5512c793af95Ssangeeta return; 5513c793af95Ssangeeta } 5514c793af95Ssangeeta frtnp = (frtn_t *)(buf + 1); 5515c793af95Ssangeeta frtnp->free_arg = (caddr_t)buf; 5516c793af95Ssangeeta frtnp->free_func = ire_freemblk; 5517c793af95Ssangeeta 5518c793af95Ssangeeta ire_mp = esballoc((unsigned char *)buf, bufsize, BPRI_MED, frtnp); 5519c793af95Ssangeeta 5520c793af95Ssangeeta if (ire_mp == NULL) { 5521c793af95Ssangeeta ip1dbg(("ire_arpresolve: esballoc failed\n")); 5522c793af95Ssangeeta kmem_free(buf, bufsize); 5523c793af95Ssangeeta return; 5524c793af95Ssangeeta } 5525c793af95Ssangeeta ASSERT(in_ire->ire_nce != NULL); 552654da8755Ssowmini areq_mp = copyb(dst_ill->ill_resolver_mp); 552754da8755Ssowmini if (areq_mp == NULL) { 5528c793af95Ssangeeta kmem_free(buf, bufsize); 5529c793af95Ssangeeta return; 5530c793af95Ssangeeta } 5531c793af95Ssangeeta 5532c793af95Ssangeeta ire_mp->b_datap->db_type = IRE_ARPRESOLVE_TYPE; 5533c793af95Ssangeeta ire = (ire_t *)buf; 5534c793af95Ssangeeta /* 5535c793af95Ssangeeta * keep enough info in the fake ire so that we can pull up 5536c793af95Ssangeeta * the incomplete ire (in_ire) after result comes back from 5537c793af95Ssangeeta * arp and make it complete. 5538c793af95Ssangeeta */ 5539c793af95Ssangeeta *ire = ire_null; 5540c793af95Ssangeeta ire->ire_u = in_ire->ire_u; 5541c793af95Ssangeeta ire->ire_ipif_seqid = in_ire->ire_ipif_seqid; 5542c793af95Ssangeeta ire->ire_ipif = in_ire->ire_ipif; 5543c793af95Ssangeeta ire->ire_stq = in_ire->ire_stq; 5544c793af95Ssangeeta ill = ire_to_ill(ire); 5545c793af95Ssangeeta ire->ire_stq_ifindex = ill->ill_phyint->phyint_ifindex; 5546c793af95Ssangeeta ire->ire_zoneid = in_ire->ire_zoneid; 5547f4b3ec61Sdh155122 ire->ire_ipst = ipst; 5548f4b3ec61Sdh155122 5549c793af95Ssangeeta /* 5550c793af95Ssangeeta * ire_freemblk will be called when ire_mp is freed, both for 5551c793af95Ssangeeta * successful and failed arp resolution. IRE_MARK_UNCACHED will be set 5552c793af95Ssangeeta * when the arp resolution failed. 5553c793af95Ssangeeta */ 5554c793af95Ssangeeta ire->ire_marks |= IRE_MARK_UNCACHED; 5555c793af95Ssangeeta ire->ire_mp = ire_mp; 5556c793af95Ssangeeta ire_mp->b_wptr = (uchar_t *)&ire[1]; 5557c793af95Ssangeeta ire_mp->b_cont = NULL; 555854da8755Ssowmini linkb(areq_mp, ire_mp); 5559c793af95Ssangeeta 5560c793af95Ssangeeta /* 5561c793af95Ssangeeta * Fill in the source and dest addrs for the resolver. 5562c793af95Ssangeeta * NOTE: this depends on memory layouts imposed by 5563c793af95Ssangeeta * ill_init(). 5564c793af95Ssangeeta */ 556554da8755Ssowmini areq = (areq_t *)areq_mp->b_rptr; 5566c793af95Ssangeeta addrp = (ipaddr_t *)((char *)areq + areq->areq_sender_addr_offset); 5567c793af95Ssangeeta *addrp = ire->ire_src_addr; 5568c793af95Ssangeeta 5569c793af95Ssangeeta addrp = (ipaddr_t *)((char *)areq + areq->areq_target_addr_offset); 5570c793af95Ssangeeta if (ire->ire_gateway_addr != INADDR_ANY) { 5571c793af95Ssangeeta *addrp = ire->ire_gateway_addr; 5572c793af95Ssangeeta } else { 5573c793af95Ssangeeta *addrp = ire->ire_addr; 5574c793af95Ssangeeta } 5575c793af95Ssangeeta 5576c793af95Ssangeeta /* Up to the resolver. */ 5577c793af95Ssangeeta if (canputnext(dst_ill->ill_rq)) { 557854da8755Ssowmini putnext(dst_ill->ill_rq, areq_mp); 5579c793af95Ssangeeta } else { 558054da8755Ssowmini freemsg(areq_mp); 5581c793af95Ssangeeta } 5582c793af95Ssangeeta } 5583c793af95Ssangeeta 5584c793af95Ssangeeta /* 5585c793af95Ssangeeta * Esballoc free function for AR_ENTRY_QUERY request to clean up any 5586c793af95Ssangeeta * unresolved ire_t and/or nce_t structures when ARP resolution fails. 5587c793af95Ssangeeta * 5588c793af95Ssangeeta * This function can be called by ARP via free routine for ire_mp or 5589c793af95Ssangeeta * by IPv4(both host and forwarding path) via ire_delete 5590c793af95Ssangeeta * in case ARP resolution fails. 5591c793af95Ssangeeta * NOTE: Since IP is MT, ARP can call into IP but not vice versa 5592c793af95Ssangeeta * (for IP to talk to ARP, it still has to send AR* messages). 5593c793af95Ssangeeta * 5594c793af95Ssangeeta * Note that the ARP/IP merge should replace the functioanlity by providing 5595c793af95Ssangeeta * direct function calls to clean up unresolved entries in ire/nce lists. 5596c793af95Ssangeeta */ 5597c793af95Ssangeeta void 5598c793af95Ssangeeta ire_freemblk(ire_t *ire_mp) 5599c793af95Ssangeeta { 5600c793af95Ssangeeta nce_t *nce = NULL; 5601c793af95Ssangeeta ill_t *ill; 5602f4b3ec61Sdh155122 ip_stack_t *ipst; 5603c793af95Ssangeeta 5604c793af95Ssangeeta ASSERT(ire_mp != NULL); 5605c793af95Ssangeeta 5606c793af95Ssangeeta if ((ire_mp->ire_addr == NULL) && (ire_mp->ire_gateway_addr == NULL)) { 5607c793af95Ssangeeta ip1dbg(("ire_freemblk(0x%p) ire_addr is NULL\n", 5608c793af95Ssangeeta (void *)ire_mp)); 5609c793af95Ssangeeta goto cleanup; 5610c793af95Ssangeeta } 5611c793af95Ssangeeta if ((ire_mp->ire_marks & IRE_MARK_UNCACHED) == 0) { 5612c793af95Ssangeeta goto cleanup; /* everything succeeded. just free and return */ 5613c793af95Ssangeeta } 5614c793af95Ssangeeta 5615c793af95Ssangeeta /* 5616c793af95Ssangeeta * the arp information corresponding to this ire_mp was not 5617c793af95Ssangeeta * transferred to a ire_cache entry. Need 5618c793af95Ssangeeta * to clean up incomplete ire's and nce, if necessary. 5619c793af95Ssangeeta */ 5620c793af95Ssangeeta ASSERT(ire_mp->ire_stq != NULL); 5621c793af95Ssangeeta ASSERT(ire_mp->ire_stq_ifindex != 0); 5622f4b3ec61Sdh155122 ASSERT(ire_mp->ire_ipst != NULL); 5623f4b3ec61Sdh155122 5624f4b3ec61Sdh155122 ipst = ire_mp->ire_ipst; 5625f4b3ec61Sdh155122 5626c793af95Ssangeeta /* 5627c793af95Ssangeeta * Get any nce's corresponding to this ire_mp. We first have to 5628c793af95Ssangeeta * make sure that the ill is still around. 5629c793af95Ssangeeta */ 5630f4b3ec61Sdh155122 ill = ill_lookup_on_ifindex(ire_mp->ire_stq_ifindex, 5631f4b3ec61Sdh155122 B_FALSE, NULL, NULL, NULL, NULL, ipst); 5632c793af95Ssangeeta if (ill == NULL || (ire_mp->ire_stq != ill->ill_wq) || 5633c793af95Ssangeeta (ill->ill_state_flags & ILL_CONDEMNED)) { 5634c793af95Ssangeeta /* 5635c793af95Ssangeeta * ill went away. no nce to clean up. 5636c793af95Ssangeeta * Note that the ill_state_flags could be set to 5637c793af95Ssangeeta * ILL_CONDEMNED after this point, but if we know 5638c793af95Ssangeeta * that it is CONDEMNED now, we just bail out quickly. 5639c793af95Ssangeeta */ 5640c793af95Ssangeeta if (ill != NULL) 5641c793af95Ssangeeta ill_refrele(ill); 5642c793af95Ssangeeta goto cleanup; 5643c793af95Ssangeeta } 5644c793af95Ssangeeta nce = ndp_lookup_v4(ill, 5645c793af95Ssangeeta ((ire_mp->ire_gateway_addr != INADDR_ANY) ? 5646c793af95Ssangeeta &ire_mp->ire_gateway_addr : &ire_mp->ire_addr), 5647c793af95Ssangeeta B_FALSE); 5648c793af95Ssangeeta ill_refrele(ill); 5649c793af95Ssangeeta 5650c793af95Ssangeeta if ((nce != NULL) && (nce->nce_state != ND_REACHABLE)) { 5651c793af95Ssangeeta /* 5652c793af95Ssangeeta * some incomplete nce was found. 5653c793af95Ssangeeta */ 5654c793af95Ssangeeta DTRACE_PROBE2(ire__freemblk__arp__resolv__fail, 5655c793af95Ssangeeta nce_t *, nce, ire_t *, ire_mp); 5656c793af95Ssangeeta /* 5657c793af95Ssangeeta * Send the icmp_unreachable messages for the queued mblks in 5658c793af95Ssangeeta * ire->ire_nce->nce_qd_mp, since ARP resolution failed 5659c793af95Ssangeeta * for this ire 5660c793af95Ssangeeta */ 5661c793af95Ssangeeta arp_resolv_failed(nce); 5662c793af95Ssangeeta /* 5663c793af95Ssangeeta * Delete the nce and clean up all ire's pointing at this nce 5664c793af95Ssangeeta * in the cachetable 5665c793af95Ssangeeta */ 5666c793af95Ssangeeta ndp_delete(nce); 5667c793af95Ssangeeta } 5668c793af95Ssangeeta if (nce != NULL) 5669c793af95Ssangeeta NCE_REFRELE(nce); /* release the ref taken by ndp_lookup_v4 */ 5670c793af95Ssangeeta 5671c793af95Ssangeeta cleanup: 5672c793af95Ssangeeta /* 5673c793af95Ssangeeta * Get rid of the ire buffer 5674c793af95Ssangeeta * We call kmem_free here(instead of ire_delete()), since 5675c793af95Ssangeeta * this is the freeb's callback. 5676c793af95Ssangeeta */ 5677c793af95Ssangeeta kmem_free(ire_mp, sizeof (ire_t) + sizeof (frtn_t)); 5678c793af95Ssangeeta } 5679c793af95Ssangeeta 5680c0861880Ssangeeta /* 568154da8755Ssowmini * find, or create if needed, a neighbor cache entry nce_t for IRE_CACHE and 568254da8755Ssowmini * non-loopback IRE_BROADCAST ire's. 568354da8755Ssowmini * 568454da8755Ssowmini * If a neighbor-cache entry has to be created (i.e., one does not already 568554da8755Ssowmini * exist in the nce list) the nce_res_mp and nce_state of the neighbor cache 568654da8755Ssowmini * entry are initialized in ndp_add_v4(). These values are picked from 568754da8755Ssowmini * the src_nce, if one is passed in. Otherwise (if src_nce == NULL) the 568854da8755Ssowmini * ire->ire_type and the outgoing interface (ire_to_ill(ire)) values 568954da8755Ssowmini * determine the {nce_state, nce_res_mp} of the nce_t created. All 569054da8755Ssowmini * IRE_BROADCAST entries have nce_state = ND_REACHABLE, and the nce_res_mp 569154da8755Ssowmini * is set to the ill_bcast_mp of the outgoing inerface. For unicast ire 569254da8755Ssowmini * entries, 569354da8755Ssowmini * - if the outgoing interface is of type IRE_IF_RESOLVER, a newly created 569454da8755Ssowmini * nce_t will have a null nce_res_mp, and will be in the ND_INITIAL state. 569554da8755Ssowmini * - if the outgoing interface is a IRE_IF_NORESOLVER interface, no link 569654da8755Ssowmini * layer resolution is necessary, so that the nce_t will be in the 569754da8755Ssowmini * ND_REACHABLE state and the nce_res_mp will have a copy of the 569854da8755Ssowmini * ill_resolver_mp of the outgoing interface. 569954da8755Ssowmini * 570054da8755Ssowmini * The link layer information needed for broadcast addresses, and for 570154da8755Ssowmini * packets sent on IRE_IF_NORESOLVER interfaces is a constant mapping that 570254da8755Ssowmini * never needs re-verification for the lifetime of the nce_t. These are 570354da8755Ssowmini * therefore marked NCE_F_PERMANENT, and never allowed to expire via 570454da8755Ssowmini * NCE_EXPIRED. 570554da8755Ssowmini * 570654da8755Ssowmini * IRE_CACHE ire's contain the information for the nexthop (ire_gateway_addr) 570754da8755Ssowmini * in the case of indirect routes, and for the dst itself (ire_addr) in the 5708c793af95Ssangeeta * case of direct routes, with the nce_res_mp containing a template 5709c793af95Ssangeeta * DL_UNITDATA request. 5710c793af95Ssangeeta * 5711c793af95Ssangeeta * The actual association of the ire_nce to the nce created here is 5712c793af95Ssangeeta * typically done in ire_add_v4 for IRE_CACHE entries. Exceptions 5713c793af95Ssangeeta * to this rule are SO_DONTROUTE ire's (IRE_MARK_NO_ADD), for which 57145c0b7edeSseb * the ire_nce assignment is done in ire_add_then_send. 5715c793af95Ssangeeta */ 5716c793af95Ssangeeta int 571754da8755Ssowmini ire_nce_init(ire_t *ire, nce_t *src_nce) 5718c793af95Ssangeeta { 571954da8755Ssowmini in_addr_t addr4; 5720c793af95Ssangeeta int err; 572154da8755Ssowmini nce_t *nce = NULL; 5722c793af95Ssangeeta ill_t *ire_ill; 572354da8755Ssowmini uint16_t nce_flags = 0; 5724f4b3ec61Sdh155122 ip_stack_t *ipst; 5725c793af95Ssangeeta 572654da8755Ssowmini if (ire->ire_stq == NULL) 5727c793af95Ssangeeta return (0); /* no need to create nce for local/loopback */ 5728c793af95Ssangeeta 5729c793af95Ssangeeta switch (ire->ire_type) { 5730c793af95Ssangeeta case IRE_CACHE: 5731c793af95Ssangeeta if (ire->ire_gateway_addr != INADDR_ANY) 5732c793af95Ssangeeta addr4 = ire->ire_gateway_addr; /* 'G' route */ 5733c793af95Ssangeeta else 5734c793af95Ssangeeta addr4 = ire->ire_addr; /* direct route */ 5735c793af95Ssangeeta break; 5736c793af95Ssangeeta case IRE_BROADCAST: 5737c793af95Ssangeeta addr4 = ire->ire_addr; 573854da8755Ssowmini nce_flags |= (NCE_F_PERMANENT|NCE_F_BCAST); 5739c793af95Ssangeeta break; 5740c793af95Ssangeeta default: 5741c793af95Ssangeeta return (0); 5742c793af95Ssangeeta } 5743c793af95Ssangeeta 5744c793af95Ssangeeta /* 5745c793af95Ssangeeta * ire_ipif is picked based on RTF_SETSRC, usesrc etc. 5746c793af95Ssangeeta * rules in ire_forward_src_ipif. We want the dlureq_mp 5747c793af95Ssangeeta * for the outgoing interface, which we get from the ire_stq. 5748c793af95Ssangeeta */ 5749c793af95Ssangeeta ire_ill = ire_to_ill(ire); 5750f4b3ec61Sdh155122 ipst = ire_ill->ill_ipst; 5751c793af95Ssangeeta 5752c793af95Ssangeeta /* 575354da8755Ssowmini * IRE_IF_NORESOLVER entries never need re-verification and 575454da8755Ssowmini * do not expire, so we mark them as NCE_F_PERMANENT. 5755c793af95Ssangeeta */ 575654da8755Ssowmini if (ire_ill->ill_net_type == IRE_IF_NORESOLVER) 575754da8755Ssowmini nce_flags |= NCE_F_PERMANENT; 5758c793af95Ssangeeta 5759b9c344b3Ssowmini retry_nce: 576054da8755Ssowmini err = ndp_lookup_then_add_v4(ire_ill, &addr4, nce_flags, 576154da8755Ssowmini &nce, src_nce); 5762c793af95Ssangeeta 576354da8755Ssowmini if (err == EEXIST && NCE_EXPIRED(nce, ipst)) { 5764b9c344b3Ssowmini /* 5765b9c344b3Ssowmini * We looked up an expired nce. 5766b9c344b3Ssowmini * Go back and try to create one again. 5767b9c344b3Ssowmini */ 576854da8755Ssowmini ndp_delete(nce); 576954da8755Ssowmini NCE_REFRELE(nce); 577054da8755Ssowmini nce = NULL; 5771b9c344b3Ssowmini goto retry_nce; 5772b9c344b3Ssowmini } 5773b9c344b3Ssowmini 577454da8755Ssowmini ip1dbg(("ire 0x%p addr 0x%lx type 0x%x; found nce 0x%p err %d\n", 577554da8755Ssowmini (void *)ire, (ulong_t)addr4, ire->ire_type, (void *)nce, err)); 5776c793af95Ssangeeta 5777c793af95Ssangeeta switch (err) { 5778c793af95Ssangeeta case 0: 5779c793af95Ssangeeta case EEXIST: 5780c793af95Ssangeeta /* 578154da8755Ssowmini * return a pointer to a newly created or existing nce_t; 5782c793af95Ssangeeta * note that the ire-nce mapping is many-one, i.e., 578354da8755Ssowmini * multiple ire's could point to the same nce_t. 5784c793af95Ssangeeta */ 5785c793af95Ssangeeta break; 5786c793af95Ssangeeta default: 5787c793af95Ssangeeta DTRACE_PROBE2(nce__init__fail, ill_t *, ire_ill, int, err); 5788c793af95Ssangeeta return (EINVAL); 5789c793af95Ssangeeta } 5790c793af95Ssangeeta if (ire->ire_type == IRE_BROADCAST) { 5791c793af95Ssangeeta /* 5792c793af95Ssangeeta * Two bcast ires are created for each interface; 5793c793af95Ssangeeta * 1. loopback copy (which does not have an 5794c793af95Ssangeeta * ire_stq, and therefore has no ire_nce), and, 5795c793af95Ssangeeta * 2. the non-loopback copy, which has the nce_res_mp 5796c793af95Ssangeeta * initialized to a copy of the ill_bcast_mp, and 5797c793af95Ssangeeta * is marked as ND_REACHABLE at this point. 5798c793af95Ssangeeta * This nce does not undergo any further state changes, 5799c793af95Ssangeeta * and exists as long as the interface is plumbed. 5800c793af95Ssangeeta * Note: we do the ire_nce assignment here for IRE_BROADCAST 5801c793af95Ssangeeta * because some functions like ill_mark_bcast() inline the 580254da8755Ssowmini * ire_add functionality. 5803c793af95Ssangeeta */ 580454da8755Ssowmini ire->ire_nce = nce; 5805c793af95Ssangeeta /* 5806c793af95Ssangeeta * We are associating this nce to the ire, 5807c793af95Ssangeeta * so change the nce ref taken in 5808c793af95Ssangeeta * ndp_lookup_then_add_v4() from 5809c793af95Ssangeeta * NCE_REFHOLD to NCE_REFHOLD_NOTR 5810c793af95Ssangeeta */ 5811c793af95Ssangeeta NCE_REFHOLD_TO_REFHOLD_NOTR(ire->ire_nce); 5812c793af95Ssangeeta } else { 5813c793af95Ssangeeta /* 5814c793af95Ssangeeta * We are not using this nce_t just yet so release 5815c793af95Ssangeeta * the ref taken in ndp_lookup_then_add_v4() 5816c793af95Ssangeeta */ 581754da8755Ssowmini NCE_REFRELE(nce); 5818c793af95Ssangeeta } 5819c793af95Ssangeeta return (0); 5820c793af95Ssangeeta } 5821