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 /* 229e3469d3SErik Nordmark * Copyright 2010 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 /* 287c478bd9Sstevel@tonic-gate * This file contains routines that manipulate Internet Routing Entries (IREs). 297c478bd9Sstevel@tonic-gate */ 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate #include <sys/types.h> 327c478bd9Sstevel@tonic-gate #include <sys/stream.h> 337c478bd9Sstevel@tonic-gate #include <sys/stropts.h> 34e11c3f44Smeem #include <sys/strsun.h> 35de8c4a14SErik Nordmark #include <sys/strsubr.h> 367c478bd9Sstevel@tonic-gate #include <sys/ddi.h> 377c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h> 387c478bd9Sstevel@tonic-gate #include <sys/policy.h> 397c478bd9Sstevel@tonic-gate 407c478bd9Sstevel@tonic-gate #include <sys/systm.h> 417c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 427c478bd9Sstevel@tonic-gate #include <sys/param.h> 437c478bd9Sstevel@tonic-gate #include <sys/socket.h> 447c478bd9Sstevel@tonic-gate #include <net/if.h> 457c478bd9Sstevel@tonic-gate #include <net/route.h> 467c478bd9Sstevel@tonic-gate #include <netinet/in.h> 477c478bd9Sstevel@tonic-gate #include <net/if_dl.h> 487c478bd9Sstevel@tonic-gate #include <netinet/ip6.h> 497c478bd9Sstevel@tonic-gate #include <netinet/icmp6.h> 507c478bd9Sstevel@tonic-gate 517c478bd9Sstevel@tonic-gate #include <inet/common.h> 527c478bd9Sstevel@tonic-gate #include <inet/mi.h> 537c478bd9Sstevel@tonic-gate #include <inet/ip.h> 547c478bd9Sstevel@tonic-gate #include <inet/ip6.h> 557c478bd9Sstevel@tonic-gate #include <inet/ip_ndp.h> 56c793af95Ssangeeta #include <inet/arp.h> 577c478bd9Sstevel@tonic-gate #include <inet/ip_if.h> 587c478bd9Sstevel@tonic-gate #include <inet/ip_ire.h> 59c793af95Ssangeeta #include <inet/ip_ftable.h> 607c478bd9Sstevel@tonic-gate #include <inet/ip_rts.h> 617c478bd9Sstevel@tonic-gate #include <inet/nd.h> 627c478bd9Sstevel@tonic-gate 637c478bd9Sstevel@tonic-gate #include <inet/tcp.h> 647c478bd9Sstevel@tonic-gate #include <inet/ipclassifier.h> 657c478bd9Sstevel@tonic-gate #include <sys/zone.h> 66f4b3ec61Sdh155122 #include <sys/cpuvar.h> 67f4b3ec61Sdh155122 6845916cd2Sjpk #include <sys/tsol/label.h> 6945916cd2Sjpk #include <sys/tsol/tnet.h> 7045916cd2Sjpk 71c793af95Ssangeeta struct kmem_cache *rt_entry_cache; 72c793af95Ssangeeta 73bd670b35SErik Nordmark typedef struct nce_clookup_s { 74bd670b35SErik Nordmark ipaddr_t ncecl_addr; 75bd670b35SErik Nordmark boolean_t ncecl_found; 76bd670b35SErik Nordmark } nce_clookup_t; 77bd670b35SErik Nordmark 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 * 85bd670b35SErik Nordmark * - bucket lock of the forwarding table in which is ire stored. 867c478bd9Sstevel@tonic-gate * 87bd670b35SErik Nordmark * ire_ill, ire_u *except* ire_gateway_addr[v6], ire_mask, 88bd670b35SErik Nordmark * ire_type, ire_create_time, ire_masklen, ire_ipversion, ire_flags, 89bd670b35SErik Nordmark * ire_bucket 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 95bd670b35SErik Nordmark * ire_add 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 * 107bd670b35SErik Nordmark * ire_refcnt, ire_identical_ref 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 * 116bd670b35SErik Nordmark * ire_generation 117bd670b35SErik Nordmark * - Under ire_lock 1187c478bd9Sstevel@tonic-gate * 119bd670b35SErik Nordmark * ire_nce_cache 120bd670b35SErik Nordmark * - Under ire_lock 1217c478bd9Sstevel@tonic-gate * 122bd670b35SErik Nordmark * ire_dep_parent (To next IRE in recursive lookup chain) 123bd670b35SErik Nordmark * - Under ips_ire_dep_lock. Write held when modifying. Read held when 124bd670b35SErik Nordmark * walking. We also hold ire_lock when modifying to allow the data path 125bd670b35SErik Nordmark * to only acquire ire_lock. 1267c478bd9Sstevel@tonic-gate * 127bd670b35SErik Nordmark * ire_dep_parent_generation (Generation number from ire_dep_parent) 128bd670b35SErik Nordmark * - Under ips_ire_dep_lock and/or ire_lock. (A read claim on the dep_lock 129bd670b35SErik Nordmark * and ire_lock held when modifying) 1307c478bd9Sstevel@tonic-gate * 131bd670b35SErik Nordmark * ire_dep_children (From parent to first child) 132bd670b35SErik Nordmark * ire_dep_sib_next (linked list of siblings) 133bd670b35SErik Nordmark * ire_dep_sib_ptpn (linked list of siblings) 134bd670b35SErik Nordmark * - Under ips_ire_dep_lock. Write held when modifying. Read held when 135bd670b35SErik Nordmark * walking. 1367c478bd9Sstevel@tonic-gate * 1377c478bd9Sstevel@tonic-gate * As we always hold the bucket locks in all the places while accessing 1387c478bd9Sstevel@tonic-gate * the above values, it is natural to use them for protecting them. 1397c478bd9Sstevel@tonic-gate * 140bd670b35SErik Nordmark * We have a forwarding table for IPv4 and IPv6. The IPv6 forwarding table 141219e6466Ssowmini * (ip_forwarding_table_v6) is an array of pointers to arrays of irb_t 142bd670b35SErik Nordmark * structures. ip_forwarding_table_v6 is allocated dynamically in 143f4b3ec61Sdh155122 * ire_add_v6. ire_ft_init_lock is used to serialize multiple threads 1447c478bd9Sstevel@tonic-gate * initializing the same bucket. Once a bucket is initialized, it is never 145f4b3ec61Sdh155122 * de-alloacted. This assumption enables us to access 146f4b3ec61Sdh155122 * ip_forwarding_table_v6[i] without any locks. 1477c478bd9Sstevel@tonic-gate * 148219e6466Ssowmini * The forwarding table for IPv4 is a radix tree whose leaves 149219e6466Ssowmini * are rt_entry structures containing the irb_t for the rt_dst. The irb_t 150219e6466Ssowmini * for IPv4 is dynamically allocated and freed. 151219e6466Ssowmini * 1527c478bd9Sstevel@tonic-gate * Each irb_t - ire bucket structure has a lock to protect 1537c478bd9Sstevel@tonic-gate * a bucket and the ires residing in the bucket have a back pointer to 1547c478bd9Sstevel@tonic-gate * the bucket structure. It also has a reference count for the number 1557c478bd9Sstevel@tonic-gate * of threads walking the bucket - irb_refcnt which is bumped up 156bd670b35SErik Nordmark * using the irb_refhold function. The flags irb_marks can be 157bd670b35SErik Nordmark * set to IRB_MARK_CONDEMNED indicating that there are some ires 158bd670b35SErik Nordmark * in this bucket that are IRE_IS_CONDEMNED and the 1597c478bd9Sstevel@tonic-gate * last thread to leave the bucket should delete the ires. Usually 160bd670b35SErik Nordmark * this is done by the irb_refrele function which is used to decrement 161219e6466Ssowmini * the reference count on a bucket. See comments above irb_t structure 162219e6466Ssowmini * definition in ip.h for further details. 1637c478bd9Sstevel@tonic-gate * 164bd670b35SErik Nordmark * The ire_refhold/ire_refrele functions operate on the ire which increments/ 1657c478bd9Sstevel@tonic-gate * decrements the reference count, ire_refcnt, atomically on the ire. 166bd670b35SErik Nordmark * ire_refcnt is modified only using those functions. Operations on the IRE 1677c478bd9Sstevel@tonic-gate * could be described as follows : 1687c478bd9Sstevel@tonic-gate * 1697c478bd9Sstevel@tonic-gate * CREATE an ire with reference count initialized to 1. 1707c478bd9Sstevel@tonic-gate * 1717c478bd9Sstevel@tonic-gate * ADDITION of an ire holds the bucket lock, checks for duplicates 172bd670b35SErik Nordmark * and then adds the ire. ire_add returns the ire after 1737c478bd9Sstevel@tonic-gate * bumping up once more i.e the reference count is 2. This is to avoid 1747c478bd9Sstevel@tonic-gate * an extra lookup in the functions calling ire_add which wants to 1757c478bd9Sstevel@tonic-gate * work with the ire after adding. 1767c478bd9Sstevel@tonic-gate * 177bd670b35SErik Nordmark * LOOKUP of an ire bumps up the reference count using ire_refhold 178bd670b35SErik Nordmark * function. It is valid to bump up the referece count of the IRE, 1797c478bd9Sstevel@tonic-gate * after the lookup has returned an ire. Following are the lookup 1807c478bd9Sstevel@tonic-gate * functions that return an HELD ire : 1817c478bd9Sstevel@tonic-gate * 182bd670b35SErik Nordmark * ire_ftable_lookup[_v6], ire_lookup_multi_ill[_v6] 1837c478bd9Sstevel@tonic-gate * 1847c478bd9Sstevel@tonic-gate * DELETION of an ire holds the bucket lock, removes it from the list 1857c478bd9Sstevel@tonic-gate * and then decrements the reference count for having removed from the list 186bd670b35SErik Nordmark * by using the ire_refrele function. If some other thread has looked up 1877c478bd9Sstevel@tonic-gate * the ire, the reference count would have been bumped up and hence 1887c478bd9Sstevel@tonic-gate * this ire will not be freed once deleted. It will be freed once the 1897c478bd9Sstevel@tonic-gate * reference count drops to zero. 1907c478bd9Sstevel@tonic-gate * 1917c478bd9Sstevel@tonic-gate * Add and Delete acquires the bucket lock as RW_WRITER, while all the 1927c478bd9Sstevel@tonic-gate * lookups acquire the bucket lock as RW_READER. 1937c478bd9Sstevel@tonic-gate * 194bd670b35SErik Nordmark * The general rule is to do the ire_refrele in the function 1957c478bd9Sstevel@tonic-gate * that is passing the ire as an argument. 1967c478bd9Sstevel@tonic-gate * 1977c478bd9Sstevel@tonic-gate * In trying to locate ires the following points are to be noted. 1987c478bd9Sstevel@tonic-gate * 199bd670b35SErik Nordmark * IRE_IS_CONDEMNED signifies that the ire has been logically deleted and is 2007c478bd9Sstevel@tonic-gate * to be ignored when walking the ires using ire_next. 2017c478bd9Sstevel@tonic-gate * 2027c478bd9Sstevel@tonic-gate * Zones note: 2037c478bd9Sstevel@tonic-gate * Walking IREs within a given zone also walks certain ires in other 2047c478bd9Sstevel@tonic-gate * zones. This is done intentionally. IRE walks with a specified 2057c478bd9Sstevel@tonic-gate * zoneid are used only when doing informational reports, and 2067c478bd9Sstevel@tonic-gate * zone users want to see things that they can access. See block 2077c478bd9Sstevel@tonic-gate * comment in ire_walk_ill_match(). 2087c478bd9Sstevel@tonic-gate */ 2097c478bd9Sstevel@tonic-gate 2107c478bd9Sstevel@tonic-gate /* 2117c478bd9Sstevel@tonic-gate * The size of the forwarding table. We will make sure that it is a 2127c478bd9Sstevel@tonic-gate * power of 2 in ip_ire_init(). 213f4b3ec61Sdh155122 * Setable in /etc/system 2147c478bd9Sstevel@tonic-gate */ 2157c478bd9Sstevel@tonic-gate uint32_t ip6_ftable_hash_size = IP6_FTABLE_HASH_SIZE; 2167c478bd9Sstevel@tonic-gate 2177c478bd9Sstevel@tonic-gate struct kmem_cache *ire_cache; 218bd670b35SErik Nordmark struct kmem_cache *ncec_cache; 219bd670b35SErik Nordmark struct kmem_cache *nce_cache; 220bd670b35SErik Nordmark 2217c478bd9Sstevel@tonic-gate static ire_t ire_null; 2227c478bd9Sstevel@tonic-gate 223bd670b35SErik Nordmark static ire_t *ire_add_v4(ire_t *ire); 2247c478bd9Sstevel@tonic-gate static void ire_delete_v4(ire_t *ire); 225bd670b35SErik Nordmark static void ire_dep_invalidate_children(ire_t *child); 22645916cd2Sjpk static void ire_walk_ipvers(pfv_t func, void *arg, uchar_t vers, 227f4b3ec61Sdh155122 zoneid_t zoneid, ip_stack_t *); 2287c478bd9Sstevel@tonic-gate static void ire_walk_ill_ipvers(uint_t match_flags, uint_t ire_type, 22945916cd2Sjpk pfv_t func, void *arg, uchar_t vers, ill_t *ill); 2306a8288c7Scarlsonj #ifdef DEBUG 2316a8288c7Scarlsonj static void ire_trace_cleanup(const ire_t *); 2327c478bd9Sstevel@tonic-gate #endif 233f1c454b4SSowmini Varadhan static void ire_dep_incr_generation_locked(ire_t *); 2347c478bd9Sstevel@tonic-gate 2357c478bd9Sstevel@tonic-gate /* 236bd670b35SErik Nordmark * Following are the functions to increment/decrement the reference 237bd670b35SErik Nordmark * count of the IREs and IRBs (ire bucket). 238bd670b35SErik Nordmark * 239bd670b35SErik Nordmark * 1) We bump up the reference count of an IRE to make sure that 240bd670b35SErik Nordmark * it does not get deleted and freed while we are using it. 241bd670b35SErik Nordmark * Typically all the lookup functions hold the bucket lock, 242bd670b35SErik Nordmark * and look for the IRE. If it finds an IRE, it bumps up the 243bd670b35SErik Nordmark * reference count before dropping the lock. Sometimes we *may* want 244bd670b35SErik Nordmark * to bump up the reference count after we *looked* up i.e without 245bd670b35SErik Nordmark * holding the bucket lock. So, the ire_refhold function does not assert 246bd670b35SErik Nordmark * on the bucket lock being held. Any thread trying to delete from 247bd670b35SErik Nordmark * the hash bucket can still do so but cannot free the IRE if 248bd670b35SErik Nordmark * ire_refcnt is not 0. 249bd670b35SErik Nordmark * 250bd670b35SErik Nordmark * 2) We bump up the reference count on the bucket where the IRE resides 251bd670b35SErik Nordmark * (IRB), when we want to prevent the IREs getting deleted from a given 252bd670b35SErik Nordmark * hash bucket. This makes life easier for ire_walk type functions which 253bd670b35SErik Nordmark * wants to walk the IRE list, call a function, but needs to drop 254bd670b35SErik Nordmark * the bucket lock to prevent recursive rw_enters. While the 255bd670b35SErik Nordmark * lock is dropped, the list could be changed by other threads or 256bd670b35SErik Nordmark * the same thread could end up deleting the ire or the ire pointed by 257bd670b35SErik Nordmark * ire_next. ire_refholding the ire or ire_next is not sufficient as 258bd670b35SErik Nordmark * a delete will still remove the ire from the bucket while we have 259bd670b35SErik Nordmark * dropped the lock and hence the ire_next would be NULL. Thus, we 260bd670b35SErik Nordmark * need a mechanism to prevent deletions from a given bucket. 261bd670b35SErik Nordmark * 262bd670b35SErik Nordmark * To prevent deletions, we bump up the reference count on the 263bd670b35SErik Nordmark * bucket. If the bucket is held, ire_delete just marks both 264bd670b35SErik Nordmark * the ire and irb as CONDEMNED. When the 265bd670b35SErik Nordmark * reference count on the bucket drops to zero, all the CONDEMNED ires 266bd670b35SErik Nordmark * are deleted. We don't have to bump up the reference count on the 267bd670b35SErik Nordmark * bucket if we are walking the bucket and never have to drop the bucket 268bd670b35SErik Nordmark * lock. Note that irb_refhold does not prevent addition of new ires 269bd670b35SErik Nordmark * in the list. It is okay because addition of new ires will not cause 270bd670b35SErik Nordmark * ire_next to point to freed memory. We do irb_refhold only when 271bd670b35SErik Nordmark * all of the 3 conditions are true : 272bd670b35SErik Nordmark * 273bd670b35SErik Nordmark * 1) The code needs to walk the IRE bucket from start to end. 274bd670b35SErik Nordmark * 2) It may have to drop the bucket lock sometimes while doing (1) 275bd670b35SErik Nordmark * 3) It does not want any ires to be deleted meanwhile. 276bd670b35SErik Nordmark */ 277bd670b35SErik Nordmark 278bd670b35SErik Nordmark /* 279bd670b35SErik Nordmark * Bump up the reference count on the hash bucket - IRB to 280bd670b35SErik Nordmark * prevent ires from being deleted in this bucket. 281bd670b35SErik Nordmark */ 282bd670b35SErik Nordmark void 283bd670b35SErik Nordmark irb_refhold(irb_t *irb) 284bd670b35SErik Nordmark { 285bd670b35SErik Nordmark rw_enter(&irb->irb_lock, RW_WRITER); 286bd670b35SErik Nordmark irb->irb_refcnt++; 287bd670b35SErik Nordmark ASSERT(irb->irb_refcnt != 0); 288bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 289bd670b35SErik Nordmark } 290bd670b35SErik Nordmark 291bd670b35SErik Nordmark void 292bd670b35SErik Nordmark irb_refhold_locked(irb_t *irb) 293bd670b35SErik Nordmark { 294bd670b35SErik Nordmark ASSERT(RW_WRITE_HELD(&irb->irb_lock)); 295bd670b35SErik Nordmark irb->irb_refcnt++; 296bd670b35SErik Nordmark ASSERT(irb->irb_refcnt != 0); 297bd670b35SErik Nordmark } 298bd670b35SErik Nordmark 299bd670b35SErik Nordmark /* 300bd670b35SErik Nordmark * Note: when IRB_MARK_DYNAMIC is not set the irb_t 301bd670b35SErik Nordmark * is statically allocated, so that when the irb_refcnt goes to 0, 302bd670b35SErik Nordmark * we simply clean up the ire list and continue. 303bd670b35SErik Nordmark */ 304bd670b35SErik Nordmark void 305bd670b35SErik Nordmark irb_refrele(irb_t *irb) 306bd670b35SErik Nordmark { 307bd670b35SErik Nordmark if (irb->irb_marks & IRB_MARK_DYNAMIC) { 308bd670b35SErik Nordmark irb_refrele_ftable(irb); 309bd670b35SErik Nordmark } else { 310bd670b35SErik Nordmark rw_enter(&irb->irb_lock, RW_WRITER); 311bd670b35SErik Nordmark ASSERT(irb->irb_refcnt != 0); 312bd670b35SErik Nordmark if (--irb->irb_refcnt == 0 && 313bd670b35SErik Nordmark (irb->irb_marks & IRB_MARK_CONDEMNED)) { 314bd670b35SErik Nordmark ire_t *ire_list; 315bd670b35SErik Nordmark 316bd670b35SErik Nordmark ire_list = ire_unlink(irb); 317bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 318bd670b35SErik Nordmark ASSERT(ire_list != NULL); 319bd670b35SErik Nordmark ire_cleanup(ire_list); 320bd670b35SErik Nordmark } else { 321bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 322bd670b35SErik Nordmark } 323bd670b35SErik Nordmark } 324bd670b35SErik Nordmark } 325bd670b35SErik Nordmark 326bd670b35SErik Nordmark 327bd670b35SErik Nordmark /* 328bd670b35SErik Nordmark * Bump up the reference count on the IRE. We cannot assert that the 329bd670b35SErik Nordmark * bucket lock is being held as it is legal to bump up the reference 330bd670b35SErik Nordmark * count after the first lookup has returned the IRE without 331bd670b35SErik Nordmark * holding the lock. 332bd670b35SErik Nordmark */ 333bd670b35SErik Nordmark void 334bd670b35SErik Nordmark ire_refhold(ire_t *ire) 335bd670b35SErik Nordmark { 336bd670b35SErik Nordmark atomic_add_32(&(ire)->ire_refcnt, 1); 337bd670b35SErik Nordmark ASSERT((ire)->ire_refcnt != 0); 338bd670b35SErik Nordmark #ifdef DEBUG 339bd670b35SErik Nordmark ire_trace_ref(ire); 340bd670b35SErik Nordmark #endif 341bd670b35SErik Nordmark } 342bd670b35SErik Nordmark 343bd670b35SErik Nordmark void 344bd670b35SErik Nordmark ire_refhold_notr(ire_t *ire) 345bd670b35SErik Nordmark { 346bd670b35SErik Nordmark atomic_add_32(&(ire)->ire_refcnt, 1); 347bd670b35SErik Nordmark ASSERT((ire)->ire_refcnt != 0); 348bd670b35SErik Nordmark } 349bd670b35SErik Nordmark 350bd670b35SErik Nordmark void 351bd670b35SErik Nordmark ire_refhold_locked(ire_t *ire) 352bd670b35SErik Nordmark { 353bd670b35SErik Nordmark #ifdef DEBUG 354bd670b35SErik Nordmark ire_trace_ref(ire); 355bd670b35SErik Nordmark #endif 356bd670b35SErik Nordmark ire->ire_refcnt++; 357bd670b35SErik Nordmark } 358bd670b35SErik Nordmark 359bd670b35SErik Nordmark /* 360bd670b35SErik Nordmark * Release a ref on an IRE. 3617c478bd9Sstevel@tonic-gate * 3627c478bd9Sstevel@tonic-gate * Must not be called while holding any locks. Otherwise if this is 3637c478bd9Sstevel@tonic-gate * the last reference to be released there is a chance of recursive mutex 3647c478bd9Sstevel@tonic-gate * panic due to ire_refrele -> ipif_ill_refrele_tail -> qwriter_ip trying 3657c478bd9Sstevel@tonic-gate * to restart an ioctl. The one exception is when the caller is sure that 3667c478bd9Sstevel@tonic-gate * this is not the last reference to be released. Eg. if the caller is 3677c478bd9Sstevel@tonic-gate * sure that the ire has not been deleted and won't be deleted. 368bd670b35SErik Nordmark * 369bd670b35SErik Nordmark * In architectures e.g sun4u, where atomic_add_32_nv is just 370bd670b35SErik Nordmark * a cas, we need to maintain the right memory barrier semantics 371bd670b35SErik Nordmark * as that of mutex_exit i.e all the loads and stores should complete 372bd670b35SErik Nordmark * before the cas is executed. membar_exit() does that here. 3737c478bd9Sstevel@tonic-gate */ 3747c478bd9Sstevel@tonic-gate void 3757c478bd9Sstevel@tonic-gate ire_refrele(ire_t *ire) 3767c478bd9Sstevel@tonic-gate { 377bd670b35SErik Nordmark #ifdef DEBUG 378bd670b35SErik Nordmark ire_untrace_ref(ire); 379bd670b35SErik Nordmark #endif 380bd670b35SErik Nordmark ASSERT((ire)->ire_refcnt != 0); 381bd670b35SErik Nordmark membar_exit(); 382bd670b35SErik Nordmark if (atomic_add_32_nv(&(ire)->ire_refcnt, -1) == 0) 383bd670b35SErik Nordmark ire_inactive(ire); 3847c478bd9Sstevel@tonic-gate } 3857c478bd9Sstevel@tonic-gate 3867c478bd9Sstevel@tonic-gate void 3877c478bd9Sstevel@tonic-gate ire_refrele_notr(ire_t *ire) 3887c478bd9Sstevel@tonic-gate { 389bd670b35SErik Nordmark ASSERT((ire)->ire_refcnt != 0); 390bd670b35SErik Nordmark membar_exit(); 391bd670b35SErik Nordmark if (atomic_add_32_nv(&(ire)->ire_refcnt, -1) == 0) 392bd670b35SErik Nordmark ire_inactive(ire); 3937c478bd9Sstevel@tonic-gate } 3947c478bd9Sstevel@tonic-gate 3957c478bd9Sstevel@tonic-gate /* 3967c478bd9Sstevel@tonic-gate * This function is associated with the IP_IOC_IRE_DELETE[_NO_REPLY] 397bd670b35SErik Nordmark * IOCTL[s]. The NO_REPLY form is used by TCP to tell IP that it is 398bd670b35SErik Nordmark * having problems reaching a particular destination. 399bd670b35SErik Nordmark * This will make IP consider alternate routes (e.g., when there are 400bd670b35SErik Nordmark * muliple default routes), and it will also make IP discard any (potentially) 401bd670b35SErik Nordmark * stale redirect. 402bd670b35SErik Nordmark * Management processes may want to use the version that generates a reply. 4037c478bd9Sstevel@tonic-gate * 404bd670b35SErik Nordmark * With the use of NUD like behavior for IPv4/ARP in addition to IPv6 405bd670b35SErik Nordmark * this function shouldn't be necessary for IP to recover from a bad redirect, 406bd670b35SErik Nordmark * a bad default router (when there are multiple default routers), or 407bd670b35SErik Nordmark * a stale ND/ARP entry. But we retain it in any case. 408bd670b35SErik Nordmark * For instance, this is helpful when TCP suspects a failure before NUD does. 4097c478bd9Sstevel@tonic-gate */ 4107c478bd9Sstevel@tonic-gate int 4117c478bd9Sstevel@tonic-gate ip_ire_delete(queue_t *q, mblk_t *mp, cred_t *ioc_cr) 4127c478bd9Sstevel@tonic-gate { 4137c478bd9Sstevel@tonic-gate uchar_t *addr_ucp; 414bd670b35SErik Nordmark uint_t ipversion; 415bd670b35SErik Nordmark sin_t *sin; 416bd670b35SErik Nordmark sin6_t *sin6; 417bd670b35SErik Nordmark ipaddr_t v4addr; 418bd670b35SErik Nordmark in6_addr_t v6addr; 4197c478bd9Sstevel@tonic-gate ire_t *ire; 4207c478bd9Sstevel@tonic-gate ipid_t *ipid; 4217c478bd9Sstevel@tonic-gate zoneid_t zoneid; 422f4b3ec61Sdh155122 ip_stack_t *ipst; 4237c478bd9Sstevel@tonic-gate 4247c478bd9Sstevel@tonic-gate ASSERT(q->q_next == NULL); 425bd670b35SErik Nordmark zoneid = IPCL_ZONEID(Q_TO_CONN(q)); 426f4b3ec61Sdh155122 ipst = CONNQ_TO_IPST(q); 4277c478bd9Sstevel@tonic-gate 4287c478bd9Sstevel@tonic-gate /* 4297c478bd9Sstevel@tonic-gate * Check privilege using the ioctl credential; if it is NULL 4307c478bd9Sstevel@tonic-gate * then this is a kernel message and therefor privileged. 4317c478bd9Sstevel@tonic-gate */ 432f4b3ec61Sdh155122 if (ioc_cr != NULL && secpolicy_ip_config(ioc_cr, B_FALSE) != 0) 4337c478bd9Sstevel@tonic-gate return (EPERM); 4347c478bd9Sstevel@tonic-gate 4357c478bd9Sstevel@tonic-gate ipid = (ipid_t *)mp->b_rptr; 4367c478bd9Sstevel@tonic-gate 4377c478bd9Sstevel@tonic-gate addr_ucp = mi_offset_param(mp, ipid->ipid_addr_offset, 4387c478bd9Sstevel@tonic-gate ipid->ipid_addr_length); 4397c478bd9Sstevel@tonic-gate if (addr_ucp == NULL || !OK_32PTR(addr_ucp)) 4407c478bd9Sstevel@tonic-gate return (EINVAL); 4417c478bd9Sstevel@tonic-gate switch (ipid->ipid_addr_length) { 442bd670b35SErik Nordmark case sizeof (sin_t): 4437c478bd9Sstevel@tonic-gate /* 4447c478bd9Sstevel@tonic-gate * got complete (sockaddr) address - increment addr_ucp to point 4457c478bd9Sstevel@tonic-gate * at the ip_addr field. 4467c478bd9Sstevel@tonic-gate */ 4477c478bd9Sstevel@tonic-gate sin = (sin_t *)addr_ucp; 4487c478bd9Sstevel@tonic-gate addr_ucp = (uchar_t *)&sin->sin_addr.s_addr; 449bd670b35SErik Nordmark ipversion = IPV4_VERSION; 4507c478bd9Sstevel@tonic-gate break; 451bd670b35SErik Nordmark case sizeof (sin6_t): 452bd670b35SErik Nordmark /* 453bd670b35SErik Nordmark * got complete (sockaddr) address - increment addr_ucp to point 454bd670b35SErik Nordmark * at the ip_addr field. 455bd670b35SErik Nordmark */ 456bd670b35SErik Nordmark sin6 = (sin6_t *)addr_ucp; 457bd670b35SErik Nordmark addr_ucp = (uchar_t *)&sin6->sin6_addr; 458bd670b35SErik Nordmark ipversion = IPV6_VERSION; 459bd670b35SErik Nordmark break; 4607c478bd9Sstevel@tonic-gate default: 4617c478bd9Sstevel@tonic-gate return (EINVAL); 4627c478bd9Sstevel@tonic-gate } 463bd670b35SErik Nordmark if (ipversion == IPV4_VERSION) { 4647c478bd9Sstevel@tonic-gate /* Extract the destination address. */ 465bd670b35SErik Nordmark bcopy(addr_ucp, &v4addr, IP_ADDR_LEN); 4667c478bd9Sstevel@tonic-gate 467bd670b35SErik Nordmark ire = ire_ftable_lookup_v4(v4addr, 0, 0, 0, NULL, 468bd670b35SErik Nordmark zoneid, NULL, MATCH_IRE_DSTONLY, 0, ipst, NULL); 469bd670b35SErik Nordmark } else { 470bd670b35SErik Nordmark /* Extract the destination address. */ 471bd670b35SErik Nordmark bcopy(addr_ucp, &v6addr, IPV6_ADDR_LEN); 4727c478bd9Sstevel@tonic-gate 473bd670b35SErik Nordmark ire = ire_ftable_lookup_v6(&v6addr, NULL, NULL, 0, NULL, 474bd670b35SErik Nordmark zoneid, NULL, MATCH_IRE_DSTONLY, 0, ipst, NULL); 4757c478bd9Sstevel@tonic-gate } 4766bdb8e66Sdd193516 if (ire != NULL) { 477bd670b35SErik Nordmark if (ipversion == IPV4_VERSION) { 4787c478bd9Sstevel@tonic-gate ip_rts_change(RTM_LOSING, ire->ire_addr, 4797c478bd9Sstevel@tonic-gate ire->ire_gateway_addr, ire->ire_mask, 480bd670b35SErik Nordmark (Q_TO_CONN(q))->conn_laddr_v4, 0, 0, 0, 481bd670b35SErik Nordmark (RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_IFA), 482bd670b35SErik Nordmark ire->ire_ipst); 4837c478bd9Sstevel@tonic-gate } 484bd670b35SErik Nordmark (void) ire_no_good(ire); 4857c478bd9Sstevel@tonic-gate ire_refrele(ire); 4867c478bd9Sstevel@tonic-gate } 4877c478bd9Sstevel@tonic-gate return (0); 4887c478bd9Sstevel@tonic-gate } 4897c478bd9Sstevel@tonic-gate 4907c478bd9Sstevel@tonic-gate /* 4917c478bd9Sstevel@tonic-gate * Initialize the ire that is specific to IPv4 part and call 4927c478bd9Sstevel@tonic-gate * ire_init_common to finish it. 493bd670b35SErik Nordmark * Returns zero or errno. 4947c478bd9Sstevel@tonic-gate */ 495bd670b35SErik Nordmark int 496bd670b35SErik Nordmark ire_init_v4(ire_t *ire, uchar_t *addr, uchar_t *mask, uchar_t *gateway, 497bd670b35SErik Nordmark ushort_t type, ill_t *ill, zoneid_t zoneid, uint_t flags, 498bd670b35SErik Nordmark tsol_gc_t *gc, ip_stack_t *ipst) 4997c478bd9Sstevel@tonic-gate { 500bd670b35SErik Nordmark int error; 501bd670b35SErik Nordmark 50245916cd2Sjpk /* 50345916cd2Sjpk * Reject IRE security attribute creation/initialization 50445916cd2Sjpk * if system is not running in Trusted mode. 50545916cd2Sjpk */ 506bd670b35SErik Nordmark if (gc != NULL && !is_system_labeled()) 507bd670b35SErik Nordmark return (EINVAL); 50845916cd2Sjpk 509f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_alloced); 5107c478bd9Sstevel@tonic-gate 5117c478bd9Sstevel@tonic-gate if (addr != NULL) 5127c478bd9Sstevel@tonic-gate bcopy(addr, &ire->ire_addr, IP_ADDR_LEN); 513bd670b35SErik Nordmark if (gateway != NULL) 514bd670b35SErik Nordmark bcopy(gateway, &ire->ire_gateway_addr, IP_ADDR_LEN); 515bd670b35SErik Nordmark 516bd670b35SErik Nordmark /* Make sure we don't have stray values in some fields */ 517bd670b35SErik Nordmark switch (type) { 518bd670b35SErik Nordmark case IRE_LOOPBACK: 519bd670b35SErik Nordmark bcopy(&ire->ire_addr, &ire->ire_gateway_addr, IP_ADDR_LEN); 520bd670b35SErik Nordmark /* FALLTHRU */ 521bd670b35SErik Nordmark case IRE_HOST: 522bd670b35SErik Nordmark case IRE_BROADCAST: 523bd670b35SErik Nordmark case IRE_LOCAL: 524bd670b35SErik Nordmark case IRE_IF_CLONE: 525bd670b35SErik Nordmark ire->ire_mask = IP_HOST_MASK; 526bd670b35SErik Nordmark ire->ire_masklen = IPV4_ABITS; 527bd670b35SErik Nordmark break; 528bd670b35SErik Nordmark case IRE_PREFIX: 529bd670b35SErik Nordmark case IRE_DEFAULT: 530bd670b35SErik Nordmark case IRE_IF_RESOLVER: 531bd670b35SErik Nordmark case IRE_IF_NORESOLVER: 5327c478bd9Sstevel@tonic-gate if (mask != NULL) { 5337c478bd9Sstevel@tonic-gate bcopy(mask, &ire->ire_mask, IP_ADDR_LEN); 5347c478bd9Sstevel@tonic-gate ire->ire_masklen = ip_mask_to_plen(ire->ire_mask); 5357c478bd9Sstevel@tonic-gate } 536bd670b35SErik Nordmark break; 537bd670b35SErik Nordmark case IRE_MULTICAST: 538bd670b35SErik Nordmark case IRE_NOROUTE: 539bd670b35SErik Nordmark ASSERT(mask == NULL); 540bd670b35SErik Nordmark break; 541bd670b35SErik Nordmark default: 542bd670b35SErik Nordmark ASSERT(0); 543bd670b35SErik Nordmark return (EINVAL); 5447c478bd9Sstevel@tonic-gate } 5457c478bd9Sstevel@tonic-gate 546bd670b35SErik Nordmark error = ire_init_common(ire, type, ill, zoneid, flags, IPV4_VERSION, 547bd670b35SErik Nordmark gc, ipst); 548bd670b35SErik Nordmark if (error != NULL) 549bd670b35SErik Nordmark return (error); 5507c478bd9Sstevel@tonic-gate 551bd670b35SErik Nordmark /* Determine which function pointers to use */ 552bd670b35SErik Nordmark ire->ire_postfragfn = ip_xmit; /* Common case */ 5537c478bd9Sstevel@tonic-gate 554bd670b35SErik Nordmark switch (ire->ire_type) { 555bd670b35SErik Nordmark case IRE_LOCAL: 556bd670b35SErik Nordmark ire->ire_sendfn = ire_send_local_v4; 557bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_local_v4; 558bd670b35SErik Nordmark ASSERT(ire->ire_ill != NULL); 5591cb875aeSCathy Zhou if (ire->ire_ill->ill_flags & ILLF_NOACCEPT) 560bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_noaccept_v6; 561bd670b35SErik Nordmark break; 562bd670b35SErik Nordmark case IRE_LOOPBACK: 563bd670b35SErik Nordmark ire->ire_sendfn = ire_send_local_v4; 564bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_loopback_v4; 565bd670b35SErik Nordmark break; 566bd670b35SErik Nordmark case IRE_BROADCAST: 567bd670b35SErik Nordmark ire->ire_postfragfn = ip_postfrag_loopcheck; 568bd670b35SErik Nordmark ire->ire_sendfn = ire_send_broadcast_v4; 569bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_broadcast_v4; 570bd670b35SErik Nordmark break; 571bd670b35SErik Nordmark case IRE_MULTICAST: 572bd670b35SErik Nordmark ire->ire_postfragfn = ip_postfrag_loopcheck; 573bd670b35SErik Nordmark ire->ire_sendfn = ire_send_multicast_v4; 574bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_multicast_v4; 575bd670b35SErik Nordmark break; 576bd670b35SErik Nordmark default: 577bd670b35SErik Nordmark /* 578bd670b35SErik Nordmark * For IRE_IF_ALL and IRE_OFFLINK we forward received 579bd670b35SErik Nordmark * packets by default. 580bd670b35SErik Nordmark */ 581bd670b35SErik Nordmark ire->ire_sendfn = ire_send_wire_v4; 582bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_forward_v4; 583bd670b35SErik Nordmark break; 584bd670b35SErik Nordmark } 585bd670b35SErik Nordmark if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) { 586bd670b35SErik Nordmark ire->ire_sendfn = ire_send_noroute_v4; 587bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_noroute_v4; 588bd670b35SErik Nordmark } else if (ire->ire_flags & RTF_MULTIRT) { 589bd670b35SErik Nordmark ire->ire_postfragfn = ip_postfrag_multirt_v4; 590bd670b35SErik Nordmark ire->ire_sendfn = ire_send_multirt_v4; 591bd670b35SErik Nordmark /* Multirt receive of broadcast uses ire_recv_broadcast_v4 */ 592bd670b35SErik Nordmark if (ire->ire_type != IRE_BROADCAST) 593bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_multirt_v4; 594bd670b35SErik Nordmark } 595bd670b35SErik Nordmark ire->ire_nce_capable = ire_determine_nce_capable(ire); 596bd670b35SErik Nordmark return (0); 5977c478bd9Sstevel@tonic-gate } 5987c478bd9Sstevel@tonic-gate 5997c478bd9Sstevel@tonic-gate /* 600bd670b35SErik Nordmark * Determine ire_nce_capable 6017c478bd9Sstevel@tonic-gate */ 602bd670b35SErik Nordmark boolean_t 603bd670b35SErik Nordmark ire_determine_nce_capable(ire_t *ire) 6047c478bd9Sstevel@tonic-gate { 605bd670b35SErik Nordmark int max_masklen; 6067c478bd9Sstevel@tonic-gate 607bd670b35SErik Nordmark if ((ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) || 608bd670b35SErik Nordmark (ire->ire_type & IRE_MULTICAST)) 609bd670b35SErik Nordmark return (B_TRUE); 6107c478bd9Sstevel@tonic-gate 611bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) 612bd670b35SErik Nordmark max_masklen = IPV4_ABITS; 613bd670b35SErik Nordmark else 614bd670b35SErik Nordmark max_masklen = IPV6_ABITS; 6157c478bd9Sstevel@tonic-gate 616bd670b35SErik Nordmark if ((ire->ire_type & IRE_ONLINK) && ire->ire_masklen == max_masklen) 617bd670b35SErik Nordmark return (B_TRUE); 618bd670b35SErik Nordmark return (B_FALSE); 6197c478bd9Sstevel@tonic-gate } 6207c478bd9Sstevel@tonic-gate 6217c478bd9Sstevel@tonic-gate /* 6227c478bd9Sstevel@tonic-gate * ire_create is called to allocate and initialize a new IRE. 6237c478bd9Sstevel@tonic-gate * 6247c478bd9Sstevel@tonic-gate * NOTE : This is called as writer sometimes though not required 6257c478bd9Sstevel@tonic-gate * by this function. 6267c478bd9Sstevel@tonic-gate */ 6277c478bd9Sstevel@tonic-gate ire_t * 628bd670b35SErik Nordmark ire_create(uchar_t *addr, uchar_t *mask, uchar_t *gateway, 629bd670b35SErik Nordmark ushort_t type, ill_t *ill, zoneid_t zoneid, uint_t flags, tsol_gc_t *gc, 630bd670b35SErik Nordmark ip_stack_t *ipst) 6317c478bd9Sstevel@tonic-gate { 6327c478bd9Sstevel@tonic-gate ire_t *ire; 633bd670b35SErik Nordmark int error; 6347c478bd9Sstevel@tonic-gate 6357c478bd9Sstevel@tonic-gate ire = kmem_cache_alloc(ire_cache, KM_NOSLEEP); 6367c478bd9Sstevel@tonic-gate if (ire == NULL) { 637bd670b35SErik Nordmark DTRACE_PROBE(kmem__cache__alloc); 6387c478bd9Sstevel@tonic-gate return (NULL); 6397c478bd9Sstevel@tonic-gate } 6407c478bd9Sstevel@tonic-gate *ire = ire_null; 6417c478bd9Sstevel@tonic-gate 642bd670b35SErik Nordmark error = ire_init_v4(ire, addr, mask, gateway, type, ill, zoneid, flags, 643bd670b35SErik Nordmark gc, ipst); 644bd670b35SErik Nordmark if (error != 0) { 645bd670b35SErik Nordmark DTRACE_PROBE2(ire__init, ire_t *, ire, int, error); 6467c478bd9Sstevel@tonic-gate kmem_cache_free(ire_cache, ire); 6477c478bd9Sstevel@tonic-gate return (NULL); 6487c478bd9Sstevel@tonic-gate } 6497c478bd9Sstevel@tonic-gate return (ire); 6507c478bd9Sstevel@tonic-gate } 6517c478bd9Sstevel@tonic-gate 6527c478bd9Sstevel@tonic-gate /* 6537c478bd9Sstevel@tonic-gate * Common to IPv4 and IPv6 654bd670b35SErik Nordmark * Returns zero or errno. 6557c478bd9Sstevel@tonic-gate */ 656bd670b35SErik Nordmark int 657bd670b35SErik Nordmark ire_init_common(ire_t *ire, ushort_t type, ill_t *ill, zoneid_t zoneid, 658bd670b35SErik Nordmark uint_t flags, uchar_t ipversion, tsol_gc_t *gc, ip_stack_t *ipst) 6597c478bd9Sstevel@tonic-gate { 660bd670b35SErik Nordmark int error; 6617c478bd9Sstevel@tonic-gate 66245916cd2Sjpk #ifdef DEBUG 663bd670b35SErik Nordmark if (ill != NULL) { 664bd670b35SErik Nordmark if (ill->ill_isv6) 6657c478bd9Sstevel@tonic-gate ASSERT(ipversion == IPV6_VERSION); 6667c478bd9Sstevel@tonic-gate else 6677c478bd9Sstevel@tonic-gate ASSERT(ipversion == IPV4_VERSION); 6687c478bd9Sstevel@tonic-gate } 66945916cd2Sjpk #endif /* DEBUG */ 67045916cd2Sjpk 67145916cd2Sjpk /* 67245916cd2Sjpk * Create/initialize IRE security attribute only in Trusted mode; 673bd670b35SErik Nordmark * if the passed in gc is non-NULL, we expect that the caller 67445916cd2Sjpk * has held a reference to it and will release it when this routine 67545916cd2Sjpk * returns a failure, otherwise we own the reference. We do this 67645916cd2Sjpk * prior to initializing the rest IRE fields. 67745916cd2Sjpk */ 67845916cd2Sjpk if (is_system_labeled()) { 67945916cd2Sjpk if ((type & (IRE_LOCAL | IRE_LOOPBACK | IRE_BROADCAST | 680bd670b35SErik Nordmark IRE_IF_ALL | IRE_MULTICAST | IRE_NOROUTE)) != 0) { 68145916cd2Sjpk /* release references on behalf of caller */ 68245916cd2Sjpk if (gc != NULL) 68345916cd2Sjpk GC_REFRELE(gc); 684bd670b35SErik Nordmark } else { 685bd670b35SErik Nordmark error = tsol_ire_init_gwattr(ire, ipversion, gc); 686bd670b35SErik Nordmark if (error != 0) 687bd670b35SErik Nordmark return (error); 68845916cd2Sjpk } 68945916cd2Sjpk } 6907c478bd9Sstevel@tonic-gate 6917c478bd9Sstevel@tonic-gate ire->ire_type = type; 6927c478bd9Sstevel@tonic-gate ire->ire_flags = RTF_UP | flags; 6937c478bd9Sstevel@tonic-gate ire->ire_create_time = (uint32_t)gethrestime_sec(); 694bd670b35SErik Nordmark ire->ire_generation = IRE_GENERATION_INITIAL; 6957c478bd9Sstevel@tonic-gate 6967c478bd9Sstevel@tonic-gate /* 697bd670b35SErik Nordmark * The ill_ire_cnt isn't increased until 698bd670b35SErik Nordmark * the IRE is added to ensure that a walker will find 699bd670b35SErik Nordmark * all IREs that hold a reference on an ill. 7007c478bd9Sstevel@tonic-gate * 701bd670b35SErik Nordmark * Note that ill_ire_multicast doesn't hold a ref on the ill since 702bd670b35SErik Nordmark * ire_add() is not called for the IRE_MULTICAST. 7037c478bd9Sstevel@tonic-gate */ 704bd670b35SErik Nordmark ire->ire_ill = ill; 705bd670b35SErik Nordmark ire->ire_zoneid = zoneid; 7067c478bd9Sstevel@tonic-gate ire->ire_ipversion = ipversion; 707bd670b35SErik Nordmark 7087c478bd9Sstevel@tonic-gate mutex_init(&ire->ire_lock, NULL, MUTEX_DEFAULT, NULL); 709c793af95Ssangeeta ire->ire_refcnt = 1; 710bd670b35SErik Nordmark ire->ire_identical_ref = 1; /* Number of ire_delete's needed */ 711f4b3ec61Sdh155122 ire->ire_ipst = ipst; /* No netstack_hold */ 7126a8288c7Scarlsonj ire->ire_trace_disable = B_FALSE; 71345916cd2Sjpk 714bd670b35SErik Nordmark return (0); 7157c478bd9Sstevel@tonic-gate } 7167c478bd9Sstevel@tonic-gate 7177c478bd9Sstevel@tonic-gate /* 718bd670b35SErik Nordmark * This creates an IRE_BROADCAST based on the arguments. 719bd670b35SErik Nordmark * A mirror is ire_lookup_bcast(). 7207c478bd9Sstevel@tonic-gate * 721bd670b35SErik Nordmark * Any supression of unneeded ones is done in ire_add_v4. 722bd670b35SErik Nordmark * We add one IRE_BROADCAST per address. ire_send_broadcast_v4() 723bd670b35SErik Nordmark * takes care of generating a loopback copy of the packet. 7247c478bd9Sstevel@tonic-gate */ 7257c478bd9Sstevel@tonic-gate ire_t ** 726bd670b35SErik Nordmark ire_create_bcast(ill_t *ill, ipaddr_t addr, zoneid_t zoneid, ire_t **irep) 7277c478bd9Sstevel@tonic-gate { 728e11c3f44Smeem ip_stack_t *ipst = ill->ill_ipst; 7297c478bd9Sstevel@tonic-gate 730bd670b35SErik Nordmark ASSERT(IAM_WRITER_ILL(ill)); 731f4b3ec61Sdh155122 7327c478bd9Sstevel@tonic-gate *irep++ = ire_create( 7337c478bd9Sstevel@tonic-gate (uchar_t *)&addr, /* dest addr */ 7347c478bd9Sstevel@tonic-gate (uchar_t *)&ip_g_all_ones, /* mask */ 7357c478bd9Sstevel@tonic-gate NULL, /* no gateway */ 7367c478bd9Sstevel@tonic-gate IRE_BROADCAST, 737bd670b35SErik Nordmark ill, 738bd670b35SErik Nordmark zoneid, 739bd670b35SErik Nordmark RTF_KERNEL, 740f4b3ec61Sdh155122 NULL, 741f4b3ec61Sdh155122 ipst); 7427c478bd9Sstevel@tonic-gate 7437c478bd9Sstevel@tonic-gate return (irep); 7447c478bd9Sstevel@tonic-gate } 7457c478bd9Sstevel@tonic-gate 7467c478bd9Sstevel@tonic-gate /* 747bd670b35SErik Nordmark * This looks up an IRE_BROADCAST based on the arguments. 748bd670b35SErik Nordmark * Mirrors ire_create_bcast(). 7497c478bd9Sstevel@tonic-gate */ 7507c478bd9Sstevel@tonic-gate ire_t * 751bd670b35SErik Nordmark ire_lookup_bcast(ill_t *ill, ipaddr_t addr, zoneid_t zoneid) 7527c478bd9Sstevel@tonic-gate { 7537c478bd9Sstevel@tonic-gate ire_t *ire; 754bd670b35SErik Nordmark int match_args; 7557c478bd9Sstevel@tonic-gate 756bd670b35SErik Nordmark match_args = MATCH_IRE_TYPE | MATCH_IRE_ILL | MATCH_IRE_GW | 757bd670b35SErik Nordmark MATCH_IRE_MASK | MATCH_IRE_ZONEONLY; 758bd670b35SErik Nordmark 759bd670b35SErik Nordmark if (IS_UNDER_IPMP(ill)) 760bd670b35SErik Nordmark match_args |= MATCH_IRE_TESTHIDDEN; 761bd670b35SErik Nordmark 762bd670b35SErik Nordmark ire = ire_ftable_lookup_v4( 763bd670b35SErik Nordmark addr, /* dest addr */ 764bd670b35SErik Nordmark ip_g_all_ones, /* mask */ 765bd670b35SErik Nordmark 0, /* no gateway */ 766bd670b35SErik Nordmark IRE_BROADCAST, 767bd670b35SErik Nordmark ill, 768bd670b35SErik Nordmark zoneid, 769bd670b35SErik Nordmark NULL, 770bd670b35SErik Nordmark match_args, 771bd670b35SErik Nordmark 0, 772bd670b35SErik Nordmark ill->ill_ipst, 773bd670b35SErik Nordmark NULL); 7747c478bd9Sstevel@tonic-gate return (ire); 7757c478bd9Sstevel@tonic-gate } 7767c478bd9Sstevel@tonic-gate 7777c478bd9Sstevel@tonic-gate /* Arrange to call the specified function for every IRE in the world. */ 7787c478bd9Sstevel@tonic-gate void 779f4b3ec61Sdh155122 ire_walk(pfv_t func, void *arg, ip_stack_t *ipst) 7807c478bd9Sstevel@tonic-gate { 781f4b3ec61Sdh155122 ire_walk_ipvers(func, arg, 0, ALL_ZONES, ipst); 7827c478bd9Sstevel@tonic-gate } 7837c478bd9Sstevel@tonic-gate 7847c478bd9Sstevel@tonic-gate void 785f4b3ec61Sdh155122 ire_walk_v4(pfv_t func, void *arg, zoneid_t zoneid, ip_stack_t *ipst) 7867c478bd9Sstevel@tonic-gate { 787f4b3ec61Sdh155122 ire_walk_ipvers(func, arg, IPV4_VERSION, zoneid, ipst); 7887c478bd9Sstevel@tonic-gate } 7897c478bd9Sstevel@tonic-gate 7907c478bd9Sstevel@tonic-gate void 791f4b3ec61Sdh155122 ire_walk_v6(pfv_t func, void *arg, zoneid_t zoneid, ip_stack_t *ipst) 7927c478bd9Sstevel@tonic-gate { 793f4b3ec61Sdh155122 ire_walk_ipvers(func, arg, IPV6_VERSION, zoneid, ipst); 7947c478bd9Sstevel@tonic-gate } 7957c478bd9Sstevel@tonic-gate 7967c478bd9Sstevel@tonic-gate /* 7977c478bd9Sstevel@tonic-gate * Walk a particular version. version == 0 means both v4 and v6. 7987c478bd9Sstevel@tonic-gate */ 7997c478bd9Sstevel@tonic-gate static void 800f4b3ec61Sdh155122 ire_walk_ipvers(pfv_t func, void *arg, uchar_t vers, zoneid_t zoneid, 801f4b3ec61Sdh155122 ip_stack_t *ipst) 8027c478bd9Sstevel@tonic-gate { 8037c478bd9Sstevel@tonic-gate if (vers != IPV6_VERSION) { 804c793af95Ssangeeta /* 805c793af95Ssangeeta * ip_forwarding_table variable doesn't matter for IPv4 since 806f4b3ec61Sdh155122 * ire_walk_ill_tables uses ips_ip_ftable for IPv4. 807c793af95Ssangeeta */ 8087c478bd9Sstevel@tonic-gate ire_walk_ill_tables(0, 0, func, arg, IP_MASK_TABLE_SIZE, 809c793af95Ssangeeta 0, NULL, 810f4b3ec61Sdh155122 NULL, zoneid, ipst); 8117c478bd9Sstevel@tonic-gate } 8127c478bd9Sstevel@tonic-gate if (vers != IPV4_VERSION) { 8137c478bd9Sstevel@tonic-gate ire_walk_ill_tables(0, 0, func, arg, IP6_MASK_TABLE_SIZE, 814f4b3ec61Sdh155122 ipst->ips_ip6_ftable_hash_size, 815f4b3ec61Sdh155122 ipst->ips_ip_forwarding_table_v6, 816bd670b35SErik Nordmark NULL, zoneid, ipst); 8177c478bd9Sstevel@tonic-gate } 8187c478bd9Sstevel@tonic-gate } 8197c478bd9Sstevel@tonic-gate 8207c478bd9Sstevel@tonic-gate /* 8217924222fSmeem * Arrange to call the specified function for every IRE that matches the ill. 8227c478bd9Sstevel@tonic-gate */ 8237c478bd9Sstevel@tonic-gate void 82445916cd2Sjpk ire_walk_ill(uint_t match_flags, uint_t ire_type, pfv_t func, void *arg, 8257c478bd9Sstevel@tonic-gate ill_t *ill) 8267c478bd9Sstevel@tonic-gate { 8277924222fSmeem uchar_t vers = (ill->ill_isv6 ? IPV6_VERSION : IPV4_VERSION); 8287924222fSmeem 8297924222fSmeem ire_walk_ill_ipvers(match_flags, ire_type, func, arg, vers, ill); 8307c478bd9Sstevel@tonic-gate } 8317c478bd9Sstevel@tonic-gate 8327c478bd9Sstevel@tonic-gate /* 8337924222fSmeem * Walk a particular ill and version. 8347c478bd9Sstevel@tonic-gate */ 8357c478bd9Sstevel@tonic-gate static void 8367c478bd9Sstevel@tonic-gate ire_walk_ill_ipvers(uint_t match_flags, uint_t ire_type, pfv_t func, 83745916cd2Sjpk void *arg, uchar_t vers, ill_t *ill) 8387c478bd9Sstevel@tonic-gate { 839f4b3ec61Sdh155122 ip_stack_t *ipst = ill->ill_ipst; 840f4b3ec61Sdh155122 8417924222fSmeem if (vers == IPV4_VERSION) { 8427c478bd9Sstevel@tonic-gate ire_walk_ill_tables(match_flags, ire_type, func, arg, 843bd670b35SErik Nordmark IP_MASK_TABLE_SIZE, 844bd670b35SErik Nordmark 0, NULL, 845bd670b35SErik Nordmark ill, ALL_ZONES, ipst); 846bd670b35SErik Nordmark } 847bd670b35SErik Nordmark if (vers != IPV4_VERSION) { 8487c478bd9Sstevel@tonic-gate ire_walk_ill_tables(match_flags, ire_type, func, arg, 849f4b3ec61Sdh155122 IP6_MASK_TABLE_SIZE, ipst->ips_ip6_ftable_hash_size, 850f4b3ec61Sdh155122 ipst->ips_ip_forwarding_table_v6, 851bd670b35SErik Nordmark ill, ALL_ZONES, ipst); 8527c478bd9Sstevel@tonic-gate } 8537c478bd9Sstevel@tonic-gate } 8547c478bd9Sstevel@tonic-gate 855bd670b35SErik Nordmark /* 856bd670b35SErik Nordmark * Do the specific matching of IREs to shared-IP zones. 857bd670b35SErik Nordmark * 858bd670b35SErik Nordmark * We have the same logic as in ire_match_args but implemented slightly 859bd670b35SErik Nordmark * differently. 860bd670b35SErik Nordmark */ 861c793af95Ssangeeta boolean_t 8627c478bd9Sstevel@tonic-gate ire_walk_ill_match(uint_t match_flags, uint_t ire_type, ire_t *ire, 863f4b3ec61Sdh155122 ill_t *ill, zoneid_t zoneid, ip_stack_t *ipst) 8647c478bd9Sstevel@tonic-gate { 865188e1664SErik Nordmark ill_t *dst_ill = ire->ire_ill; 8667c478bd9Sstevel@tonic-gate 8677c478bd9Sstevel@tonic-gate ASSERT(match_flags != 0 || zoneid != ALL_ZONES); 8687c478bd9Sstevel@tonic-gate 869bd670b35SErik Nordmark if (zoneid != ALL_ZONES && zoneid != ire->ire_zoneid && 870bd670b35SErik Nordmark ire->ire_zoneid != ALL_ZONES) { 8717c478bd9Sstevel@tonic-gate /* 8727c478bd9Sstevel@tonic-gate * We're walking the IREs for a specific zone. The only relevant 8737c478bd9Sstevel@tonic-gate * IREs are: 8747c478bd9Sstevel@tonic-gate * - all IREs with a matching ire_zoneid 875bd670b35SErik Nordmark * - IRE_IF_ALL IREs for interfaces with a usable source addr 8767c478bd9Sstevel@tonic-gate * with a matching zone 877bd670b35SErik Nordmark * - IRE_OFFLINK with a gateway reachable from the zone 878bd670b35SErik Nordmark * Note that ealier we only did the IRE_OFFLINK check for 879bd670b35SErik Nordmark * IRE_DEFAULT (and only when we had multiple IRE_DEFAULTs). 8807c478bd9Sstevel@tonic-gate */ 881bd670b35SErik Nordmark if (ire->ire_type & IRE_ONLINK) { 882bd670b35SErik Nordmark uint_t ifindex; 883bd670b35SErik Nordmark 8847c478bd9Sstevel@tonic-gate /* 885bd670b35SErik Nordmark * Note there is no IRE_INTERFACE on vniN thus 886bd670b35SErik Nordmark * can't do an IRE lookup for a matching route. 8877c478bd9Sstevel@tonic-gate */ 888bd670b35SErik Nordmark ifindex = dst_ill->ill_usesrc_ifindex; 889bd670b35SErik Nordmark if (ifindex == 0) 8907c478bd9Sstevel@tonic-gate return (B_FALSE); 891bd670b35SErik Nordmark 8927c478bd9Sstevel@tonic-gate /* 893bd670b35SErik Nordmark * If there is a usable source address in the 894bd670b35SErik Nordmark * zone, then it's ok to return an 895bd670b35SErik Nordmark * IRE_INTERFACE 8967c478bd9Sstevel@tonic-gate */ 897bd670b35SErik Nordmark if (!ipif_zone_avail(ifindex, dst_ill->ill_isv6, 898bd670b35SErik Nordmark zoneid, ipst)) { 8997c478bd9Sstevel@tonic-gate return (B_FALSE); 9007c478bd9Sstevel@tonic-gate } 9017c478bd9Sstevel@tonic-gate } 902bd670b35SErik Nordmark if (dst_ill != NULL && (ire->ire_type & IRE_OFFLINK)) { 903bd670b35SErik Nordmark ipif_t *tipif; 904bd670b35SErik Nordmark 905bd670b35SErik Nordmark mutex_enter(&dst_ill->ill_lock); 906bd670b35SErik Nordmark for (tipif = dst_ill->ill_ipif; 907bd670b35SErik Nordmark tipif != NULL; tipif = tipif->ipif_next) { 908bd670b35SErik Nordmark if (!IPIF_IS_CONDEMNED(tipif) && 909bd670b35SErik Nordmark (tipif->ipif_flags & IPIF_UP) && 910bd670b35SErik Nordmark (tipif->ipif_zoneid == zoneid || 911bd670b35SErik Nordmark tipif->ipif_zoneid == ALL_ZONES)) 912bd670b35SErik Nordmark break; 913bd670b35SErik Nordmark } 914bd670b35SErik Nordmark mutex_exit(&dst_ill->ill_lock); 915bd670b35SErik Nordmark if (tipif == NULL) { 9167c478bd9Sstevel@tonic-gate return (B_FALSE); 9177c478bd9Sstevel@tonic-gate } 9187c478bd9Sstevel@tonic-gate } 919188e1664SErik Nordmark } 9207c478bd9Sstevel@tonic-gate /* 921188e1664SErik Nordmark * Except for ALL_ZONES, we only match the offlink routes 922bd670b35SErik Nordmark * where ire_gateway_addr has an IRE_INTERFACE for the zoneid. 9239e3469d3SErik Nordmark * Since we can have leftover routes after the IP addresses have 9249e3469d3SErik Nordmark * changed, the global zone will also match offlink routes where the 9259e3469d3SErik Nordmark * gateway is unreachable from any zone. 9267c478bd9Sstevel@tonic-gate */ 927188e1664SErik Nordmark if ((ire->ire_type & IRE_OFFLINK) && zoneid != ALL_ZONES) { 9287c478bd9Sstevel@tonic-gate in6_addr_t gw_addr_v6; 9299e3469d3SErik Nordmark boolean_t reach; 930e11c3f44Smeem 9317c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 9329e3469d3SErik Nordmark reach = ire_gateway_ok_zone_v4(ire->ire_gateway_addr, 9339e3469d3SErik Nordmark zoneid, dst_ill, NULL, ipst, B_FALSE); 9347c478bd9Sstevel@tonic-gate } else { 9357c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV6_VERSION); 9367c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 9377c478bd9Sstevel@tonic-gate gw_addr_v6 = ire->ire_gateway_addr_v6; 9387c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 939bd670b35SErik Nordmark 9409e3469d3SErik Nordmark reach = ire_gateway_ok_zone_v6(&gw_addr_v6, zoneid, 9419e3469d3SErik Nordmark dst_ill, NULL, ipst, B_FALSE); 9429e3469d3SErik Nordmark } 9439e3469d3SErik Nordmark if (!reach) { 9449e3469d3SErik Nordmark if (zoneid != GLOBAL_ZONEID) 9457c478bd9Sstevel@tonic-gate return (B_FALSE); 9469e3469d3SErik Nordmark 9479e3469d3SErik Nordmark /* 9489e3469d3SErik Nordmark * Check if ALL_ZONES reachable - if not then let the 9499e3469d3SErik Nordmark * global zone see it. 9509e3469d3SErik Nordmark */ 9519e3469d3SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) { 9529e3469d3SErik Nordmark reach = ire_gateway_ok_zone_v4( 9539e3469d3SErik Nordmark ire->ire_gateway_addr, ALL_ZONES, 9549e3469d3SErik Nordmark dst_ill, NULL, ipst, B_FALSE); 9559e3469d3SErik Nordmark } else { 9569e3469d3SErik Nordmark reach = ire_gateway_ok_zone_v6(&gw_addr_v6, 9579e3469d3SErik Nordmark ALL_ZONES, dst_ill, NULL, ipst, B_FALSE); 9589e3469d3SErik Nordmark } 9599e3469d3SErik Nordmark if (reach) { 9609e3469d3SErik Nordmark /* 9619e3469d3SErik Nordmark * Some other zone could see it, hence hide it 9629e3469d3SErik Nordmark * in the global zone. 9639e3469d3SErik Nordmark */ 9649e3469d3SErik Nordmark return (B_FALSE); 9659e3469d3SErik Nordmark } 9667c478bd9Sstevel@tonic-gate } 9677c478bd9Sstevel@tonic-gate } 9687c478bd9Sstevel@tonic-gate 9697c478bd9Sstevel@tonic-gate if (((!(match_flags & MATCH_IRE_TYPE)) || 9707c478bd9Sstevel@tonic-gate (ire->ire_type & ire_type)) && 9717c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_ILL)) || 972bd670b35SErik Nordmark (dst_ill == ill || 973bd670b35SErik Nordmark dst_ill != NULL && IS_IN_SAME_ILLGRP(dst_ill, ill)))) { 9747c478bd9Sstevel@tonic-gate return (B_TRUE); 9757c478bd9Sstevel@tonic-gate } 9767c478bd9Sstevel@tonic-gate return (B_FALSE); 9777c478bd9Sstevel@tonic-gate } 9787c478bd9Sstevel@tonic-gate 979c793af95Ssangeeta int 980c793af95Ssangeeta rtfunc(struct radix_node *rn, void *arg) 981c793af95Ssangeeta { 982c793af95Ssangeeta struct rtfuncarg *rtf = arg; 983c793af95Ssangeeta struct rt_entry *rt; 984c793af95Ssangeeta irb_t *irb; 985c793af95Ssangeeta ire_t *ire; 986c793af95Ssangeeta boolean_t ret; 987c793af95Ssangeeta 988c793af95Ssangeeta rt = (struct rt_entry *)rn; 989c793af95Ssangeeta ASSERT(rt != NULL); 990c793af95Ssangeeta irb = &rt->rt_irb; 991c793af95Ssangeeta for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 992c793af95Ssangeeta if ((rtf->rt_match_flags != 0) || 993c793af95Ssangeeta (rtf->rt_zoneid != ALL_ZONES)) { 994c793af95Ssangeeta ret = ire_walk_ill_match(rtf->rt_match_flags, 995c793af95Ssangeeta rtf->rt_ire_type, ire, 996f4b3ec61Sdh155122 rtf->rt_ill, rtf->rt_zoneid, rtf->rt_ipst); 997bd670b35SErik Nordmark } else { 998c793af95Ssangeeta ret = B_TRUE; 999bd670b35SErik Nordmark } 1000c793af95Ssangeeta if (ret) 1001c793af95Ssangeeta (*rtf->rt_func)(ire, rtf->rt_arg); 1002c793af95Ssangeeta } 1003c793af95Ssangeeta return (0); 1004c793af95Ssangeeta } 1005c793af95Ssangeeta 10067c478bd9Sstevel@tonic-gate /* 1007bd670b35SErik Nordmark * Walk the ftable entries that match the ill. 10087c478bd9Sstevel@tonic-gate */ 1009c793af95Ssangeeta void 10107c478bd9Sstevel@tonic-gate ire_walk_ill_tables(uint_t match_flags, uint_t ire_type, pfv_t func, 101145916cd2Sjpk void *arg, size_t ftbl_sz, size_t htbl_sz, irb_t **ipftbl, 1012bd670b35SErik Nordmark ill_t *ill, zoneid_t zoneid, 1013f4b3ec61Sdh155122 ip_stack_t *ipst) 10147c478bd9Sstevel@tonic-gate { 10157c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 10167c478bd9Sstevel@tonic-gate irb_t *irb; 10177c478bd9Sstevel@tonic-gate ire_t *ire; 10187c478bd9Sstevel@tonic-gate int i, j; 10197c478bd9Sstevel@tonic-gate boolean_t ret; 1020c793af95Ssangeeta struct rtfuncarg rtfarg; 10217c478bd9Sstevel@tonic-gate 1022e11c3f44Smeem ASSERT((!(match_flags & MATCH_IRE_ILL)) || (ill != NULL)); 10237c478bd9Sstevel@tonic-gate ASSERT(!(match_flags & MATCH_IRE_TYPE) || (ire_type != 0)); 1024bd670b35SErik Nordmark 1025c793af95Ssangeeta /* knobs such that routine is called only for v6 case */ 1026f4b3ec61Sdh155122 if (ipftbl == ipst->ips_ip_forwarding_table_v6) { 10277c478bd9Sstevel@tonic-gate for (i = (ftbl_sz - 1); i >= 0; i--) { 10287c478bd9Sstevel@tonic-gate if ((irb_ptr = ipftbl[i]) == NULL) 10297c478bd9Sstevel@tonic-gate continue; 10307c478bd9Sstevel@tonic-gate for (j = 0; j < htbl_sz; j++) { 10317c478bd9Sstevel@tonic-gate irb = &irb_ptr[j]; 10327c478bd9Sstevel@tonic-gate if (irb->irb_ire == NULL) 10337c478bd9Sstevel@tonic-gate continue; 1034c793af95Ssangeeta 1035bd670b35SErik Nordmark irb_refhold(irb); 10367c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; 10377c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 10387c478bd9Sstevel@tonic-gate if (match_flags == 0 && 10397c478bd9Sstevel@tonic-gate zoneid == ALL_ZONES) { 10407c478bd9Sstevel@tonic-gate ret = B_TRUE; 10417c478bd9Sstevel@tonic-gate } else { 1042c793af95Ssangeeta ret = 1043c793af95Ssangeeta ire_walk_ill_match( 1044c793af95Ssangeeta match_flags, 1045c793af95Ssangeeta ire_type, ire, ill, 1046f4b3ec61Sdh155122 zoneid, ipst); 10477c478bd9Sstevel@tonic-gate } 10487c478bd9Sstevel@tonic-gate if (ret) 10497c478bd9Sstevel@tonic-gate (*func)(ire, arg); 10507c478bd9Sstevel@tonic-gate } 1051bd670b35SErik Nordmark irb_refrele(irb); 10527c478bd9Sstevel@tonic-gate } 10537c478bd9Sstevel@tonic-gate } 1054c793af95Ssangeeta } else { 1055188e1664SErik Nordmark bzero(&rtfarg, sizeof (rtfarg)); 1056c793af95Ssangeeta rtfarg.rt_func = func; 1057c793af95Ssangeeta rtfarg.rt_arg = arg; 1058c793af95Ssangeeta if (match_flags != 0) { 1059c793af95Ssangeeta rtfarg.rt_match_flags = match_flags; 1060c793af95Ssangeeta } 1061c793af95Ssangeeta rtfarg.rt_ire_type = ire_type; 1062c793af95Ssangeeta rtfarg.rt_ill = ill; 1063c793af95Ssangeeta rtfarg.rt_zoneid = zoneid; 1064f4b3ec61Sdh155122 rtfarg.rt_ipst = ipst; /* No netstack_hold */ 1065f4b3ec61Sdh155122 (void) ipst->ips_ip_ftable->rnh_walktree_mt( 1066f4b3ec61Sdh155122 ipst->ips_ip_ftable, 1067f4b3ec61Sdh155122 rtfunc, &rtfarg, irb_refhold_rn, irb_refrele_rn); 1068c793af95Ssangeeta } 10697c478bd9Sstevel@tonic-gate } 10707c478bd9Sstevel@tonic-gate 10717c478bd9Sstevel@tonic-gate /* 10727c478bd9Sstevel@tonic-gate * This function takes a mask and returns 10737c478bd9Sstevel@tonic-gate * number of bits set in the mask. If no 10747c478bd9Sstevel@tonic-gate * bit is set it returns 0. 10757c478bd9Sstevel@tonic-gate * Assumes a contiguous mask. 10767c478bd9Sstevel@tonic-gate */ 10777c478bd9Sstevel@tonic-gate int 10787c478bd9Sstevel@tonic-gate ip_mask_to_plen(ipaddr_t mask) 10797c478bd9Sstevel@tonic-gate { 10807c478bd9Sstevel@tonic-gate return (mask == 0 ? 0 : IP_ABITS - (ffs(ntohl(mask)) -1)); 10817c478bd9Sstevel@tonic-gate } 10827c478bd9Sstevel@tonic-gate 10837c478bd9Sstevel@tonic-gate /* 10847c478bd9Sstevel@tonic-gate * Convert length for a mask to the mask. 10857c478bd9Sstevel@tonic-gate */ 10867c478bd9Sstevel@tonic-gate ipaddr_t 10877c478bd9Sstevel@tonic-gate ip_plen_to_mask(uint_t masklen) 10887c478bd9Sstevel@tonic-gate { 1089bd670b35SErik Nordmark if (masklen == 0) 1090bd670b35SErik Nordmark return (0); 1091bd670b35SErik Nordmark 10927c478bd9Sstevel@tonic-gate return (htonl(IP_HOST_MASK << (IP_ABITS - masklen))); 10937c478bd9Sstevel@tonic-gate } 10947c478bd9Sstevel@tonic-gate 10957c478bd9Sstevel@tonic-gate void 10967c478bd9Sstevel@tonic-gate ire_atomic_end(irb_t *irb_ptr, ire_t *ire) 10977c478bd9Sstevel@tonic-gate { 10987c478bd9Sstevel@tonic-gate ill_t *ill; 10997c478bd9Sstevel@tonic-gate 1100bd670b35SErik Nordmark ill = ire->ire_ill; 1101bd670b35SErik Nordmark if (ill != NULL) 1102bd670b35SErik Nordmark mutex_exit(&ill->ill_lock); 1103bd670b35SErik Nordmark rw_exit(&irb_ptr->irb_lock); 11047c478bd9Sstevel@tonic-gate } 11057c478bd9Sstevel@tonic-gate 1106bd670b35SErik Nordmark /* 1107bd670b35SErik Nordmark * ire_add_v[46] atomically make sure that the ill associated 1108bd670b35SErik Nordmark * with the new ire is not going away i.e., we check ILL_CONDEMNED. 1109bd670b35SErik Nordmark */ 1110bd670b35SErik Nordmark int 1111bd670b35SErik Nordmark ire_atomic_start(irb_t *irb_ptr, ire_t *ire) 1112bd670b35SErik Nordmark { 1113bd670b35SErik Nordmark ill_t *ill; 1114bd670b35SErik Nordmark 1115bd670b35SErik Nordmark ill = ire->ire_ill; 1116bd670b35SErik Nordmark 1117bd670b35SErik Nordmark rw_enter(&irb_ptr->irb_lock, RW_WRITER); 1118bd670b35SErik Nordmark if (ill != NULL) { 11197c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 1120bd670b35SErik Nordmark 1121bd670b35SErik Nordmark /* 1122bd670b35SErik Nordmark * Don't allow IRE's to be created on dying ills. 1123bd670b35SErik Nordmark */ 11247c478bd9Sstevel@tonic-gate if (ill->ill_state_flags & ILL_CONDEMNED) { 1125bd670b35SErik Nordmark ire_atomic_end(irb_ptr, ire); 1126bd670b35SErik Nordmark return (ENXIO); 11277c478bd9Sstevel@tonic-gate } 11287c478bd9Sstevel@tonic-gate 1129bd670b35SErik Nordmark if (IS_UNDER_IPMP(ill)) { 1130bd670b35SErik Nordmark int error = 0; 1131bd670b35SErik Nordmark mutex_enter(&ill->ill_phyint->phyint_lock); 1132bd670b35SErik Nordmark if (!ipmp_ill_is_active(ill) && 1133bd670b35SErik Nordmark IRE_HIDDEN_TYPE(ire->ire_type) && 1134bd670b35SErik Nordmark !ire->ire_testhidden) { 1135bd670b35SErik Nordmark error = EINVAL; 1136dc3879f9Sjarrett } 1137bd670b35SErik Nordmark mutex_exit(&ill->ill_phyint->phyint_lock); 1138dc3879f9Sjarrett if (error != 0) { 1139bd670b35SErik Nordmark ire_atomic_end(irb_ptr, ire); 1140dc3879f9Sjarrett return (error); 1141dc3879f9Sjarrett } 1142dc3879f9Sjarrett } 1143bd670b35SErik Nordmark 1144bd670b35SErik Nordmark } 1145bd670b35SErik Nordmark return (0); 11467c478bd9Sstevel@tonic-gate } 11477c478bd9Sstevel@tonic-gate 11487c478bd9Sstevel@tonic-gate /* 1149bd670b35SErik Nordmark * Add a fully initialized IRE to the forwarding table. 1150bd670b35SErik Nordmark * This returns NULL on failure, or a held IRE on success. 1151bd670b35SErik Nordmark * Normally the returned IRE is the same as the argument. But a different 1152bd670b35SErik Nordmark * IRE will be returned if the added IRE is deemed identical to an existing 1153bd670b35SErik Nordmark * one. In that case ire_identical_ref will be increased. 1154bd670b35SErik Nordmark * The caller always needs to do an ire_refrele() on the returned IRE. 11557c478bd9Sstevel@tonic-gate */ 1156bd670b35SErik Nordmark ire_t * 1157bd670b35SErik Nordmark ire_add(ire_t *ire) 1158bd670b35SErik Nordmark { 1159bd670b35SErik Nordmark if (IRE_HIDDEN_TYPE(ire->ire_type) && 1160bd670b35SErik Nordmark ire->ire_ill != NULL && IS_UNDER_IPMP(ire->ire_ill)) { 1161bd670b35SErik Nordmark /* 1162bd670b35SErik Nordmark * IREs hosted on interfaces that are under IPMP 1163bd670b35SErik Nordmark * should be hidden so that applications don't 1164bd670b35SErik Nordmark * accidentally end up sending packets with test 1165bd670b35SErik Nordmark * addresses as their source addresses, or 1166bd670b35SErik Nordmark * sending out interfaces that are e.g. IFF_INACTIVE. 1167bd670b35SErik Nordmark * Hide them here. 1168bd670b35SErik Nordmark */ 1169bd670b35SErik Nordmark ire->ire_testhidden = B_TRUE; 1170bd670b35SErik Nordmark } 1171bd670b35SErik Nordmark 11725c0b7edeSseb if (ire->ire_ipversion == IPV6_VERSION) 1173bd670b35SErik Nordmark return (ire_add_v6(ire)); 11747c478bd9Sstevel@tonic-gate else 1175bd670b35SErik Nordmark return (ire_add_v4(ire)); 11767c478bd9Sstevel@tonic-gate } 11777c478bd9Sstevel@tonic-gate 11787c478bd9Sstevel@tonic-gate /* 1179bd670b35SErik Nordmark * Add a fully initialized IPv4 IRE to the forwarding table. 1180bd670b35SErik Nordmark * This returns NULL on failure, or a held IRE on success. 1181bd670b35SErik Nordmark * Normally the returned IRE is the same as the argument. But a different 1182bd670b35SErik Nordmark * IRE will be returned if the added IRE is deemed identical to an existing 1183bd670b35SErik Nordmark * one. In that case ire_identical_ref will be increased. 1184bd670b35SErik Nordmark * The caller always needs to do an ire_refrele() on the returned IRE. 11857c478bd9Sstevel@tonic-gate */ 1186bd670b35SErik Nordmark static ire_t * 1187bd670b35SErik Nordmark ire_add_v4(ire_t *ire) 11887c478bd9Sstevel@tonic-gate { 11897c478bd9Sstevel@tonic-gate ire_t *ire1; 11907c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 11917c478bd9Sstevel@tonic-gate ire_t **irep; 1192bd670b35SErik Nordmark int match_flags; 11937c478bd9Sstevel@tonic-gate int error; 1194f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 1195e11c3f44Smeem 1196bd670b35SErik Nordmark if (ire->ire_ill != NULL) 1197bd670b35SErik Nordmark ASSERT(!MUTEX_HELD(&ire->ire_ill->ill_lock)); 11987c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 11997c478bd9Sstevel@tonic-gate 12007c478bd9Sstevel@tonic-gate /* Make sure the address is properly masked. */ 12017c478bd9Sstevel@tonic-gate ire->ire_addr &= ire->ire_mask; 12027c478bd9Sstevel@tonic-gate 1203bd670b35SErik Nordmark match_flags = (MATCH_IRE_MASK | MATCH_IRE_TYPE | MATCH_IRE_GW); 1204c793af95Ssangeeta 1205bd670b35SErik Nordmark if (ire->ire_ill != NULL) { 1206bd670b35SErik Nordmark match_flags |= MATCH_IRE_ILL; 1207bd670b35SErik Nordmark } 1208bd670b35SErik Nordmark irb_ptr = ire_get_bucket(ire); 1209bd670b35SErik Nordmark if (irb_ptr == NULL) { 1210bd670b35SErik Nordmark printf("no bucket for %p\n", (void *)ire); 12117c478bd9Sstevel@tonic-gate ire_delete(ire); 1212bd670b35SErik Nordmark return (NULL); 12137c478bd9Sstevel@tonic-gate } 12147c478bd9Sstevel@tonic-gate 12157c478bd9Sstevel@tonic-gate /* 1216bd670b35SErik Nordmark * Start the atomic add of the ire. Grab the ill lock, 1217bd670b35SErik Nordmark * the bucket lock. Check for condemned. 12187c478bd9Sstevel@tonic-gate */ 1219bd670b35SErik Nordmark error = ire_atomic_start(irb_ptr, ire); 1220bd670b35SErik Nordmark if (error != 0) { 1221bd670b35SErik Nordmark printf("no ire_atomic_start for %p\n", (void *)ire); 1222bd670b35SErik Nordmark ire_delete(ire); 1223bd670b35SErik Nordmark irb_refrele(irb_ptr); 1224bd670b35SErik Nordmark return (NULL); 1225bd670b35SErik Nordmark } 12267c478bd9Sstevel@tonic-gate /* 1227e11c3f44Smeem * If we are creating a hidden IRE, make sure we search for 1228e11c3f44Smeem * hidden IREs when searching for duplicates below. 1229e11c3f44Smeem * Otherwise, we might find an IRE on some other interface 1230e11c3f44Smeem * that's not marked hidden. 12317c478bd9Sstevel@tonic-gate */ 1232bd670b35SErik Nordmark if (ire->ire_testhidden) 1233bd670b35SErik Nordmark match_flags |= MATCH_IRE_TESTHIDDEN; 12347c478bd9Sstevel@tonic-gate 12357c478bd9Sstevel@tonic-gate /* 12367c478bd9Sstevel@tonic-gate * Atomically check for duplicate and insert in the table. 12377c478bd9Sstevel@tonic-gate */ 12387c478bd9Sstevel@tonic-gate for (ire1 = irb_ptr->irb_ire; ire1 != NULL; ire1 = ire1->ire_next) { 1239bd670b35SErik Nordmark if (IRE_IS_CONDEMNED(ire1)) 12407c478bd9Sstevel@tonic-gate continue; 12417c478bd9Sstevel@tonic-gate /* 1242bd670b35SErik Nordmark * Here we need an exact match on zoneid, i.e., 1243bd670b35SErik Nordmark * ire_match_args doesn't fit. 12447c478bd9Sstevel@tonic-gate */ 12457c478bd9Sstevel@tonic-gate if (ire1->ire_zoneid != ire->ire_zoneid) 12467c478bd9Sstevel@tonic-gate continue; 1247bd670b35SErik Nordmark 1248bd670b35SErik Nordmark if (ire1->ire_type != ire->ire_type) 1249bd670b35SErik Nordmark continue; 1250bd670b35SErik Nordmark 1251bd670b35SErik Nordmark /* 1252bd670b35SErik Nordmark * Note: We do not allow multiple routes that differ only 1253bd670b35SErik Nordmark * in the gateway security attributes; such routes are 1254bd670b35SErik Nordmark * considered duplicates. 1255bd670b35SErik Nordmark * To change that we explicitly have to treat them as 1256bd670b35SErik Nordmark * different here. 1257bd670b35SErik Nordmark */ 12587c478bd9Sstevel@tonic-gate if (ire_match_args(ire1, ire->ire_addr, ire->ire_mask, 1259bd670b35SErik Nordmark ire->ire_gateway_addr, ire->ire_type, ire->ire_ill, 1260bd670b35SErik Nordmark ire->ire_zoneid, NULL, match_flags)) { 12617c478bd9Sstevel@tonic-gate /* 12627c478bd9Sstevel@tonic-gate * Return the old ire after doing a REFHOLD. 12637c478bd9Sstevel@tonic-gate * As most of the callers continue to use the IRE 12647c478bd9Sstevel@tonic-gate * after adding, we return a held ire. This will 12657c478bd9Sstevel@tonic-gate * avoid a lookup in the caller again. If the callers 12667c478bd9Sstevel@tonic-gate * don't want to use it, they need to do a REFRELE. 12677c478bd9Sstevel@tonic-gate */ 1268bd670b35SErik Nordmark atomic_add_32(&ire1->ire_identical_ref, 1); 1269bd670b35SErik Nordmark DTRACE_PROBE2(ire__add__exist, ire_t *, ire1, 1270bd670b35SErik Nordmark ire_t *, ire); 1271bd670b35SErik Nordmark ire_refhold(ire1); 12727c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 12737c478bd9Sstevel@tonic-gate ire_delete(ire); 1274bd670b35SErik Nordmark irb_refrele(irb_ptr); 1275bd670b35SErik Nordmark return (ire1); 12767c478bd9Sstevel@tonic-gate } 12777c478bd9Sstevel@tonic-gate } 1278e11c3f44Smeem 1279c793af95Ssangeeta /* 1280bd670b35SErik Nordmark * Normally we do head insertion since most things do not care about 1281bd670b35SErik Nordmark * the order of the IREs in the bucket. Note that ip_cgtp_bcast_add 1282bd670b35SErik Nordmark * assumes we at least do head insertion so that its IRE_BROADCAST 1283bd670b35SErik Nordmark * arrive ahead of existing IRE_HOST for the same address. 1284bd670b35SErik Nordmark * However, due to shared-IP zones (and restrict_interzone_loopback) 1285bd670b35SErik Nordmark * we can have an IRE_LOCAL as well as IRE_IF_CLONE for the same 1286bd670b35SErik Nordmark * address. For that reason we do tail insertion for IRE_IF_CLONE. 1287bd670b35SErik Nordmark * Due to the IRE_BROADCAST on cgtp0, which must be last in the bucket, 1288bd670b35SErik Nordmark * we do tail insertion of IRE_BROADCASTs that do not have RTF_MULTIRT 1289bd670b35SErik Nordmark * set. 12907c478bd9Sstevel@tonic-gate */ 12917c478bd9Sstevel@tonic-gate irep = (ire_t **)irb_ptr; 1292bd670b35SErik Nordmark if ((ire->ire_type & IRE_IF_CLONE) || 1293bd670b35SErik Nordmark ((ire->ire_type & IRE_BROADCAST) && 1294bd670b35SErik Nordmark !(ire->ire_flags & RTF_MULTIRT))) { 1295bd670b35SErik Nordmark while ((ire1 = *irep) != NULL) 12967c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 12977c478bd9Sstevel@tonic-gate } 12987c478bd9Sstevel@tonic-gate /* Insert at *irep */ 12997c478bd9Sstevel@tonic-gate ire1 = *irep; 13007c478bd9Sstevel@tonic-gate if (ire1 != NULL) 13017c478bd9Sstevel@tonic-gate ire1->ire_ptpn = &ire->ire_next; 13027c478bd9Sstevel@tonic-gate ire->ire_next = ire1; 13037c478bd9Sstevel@tonic-gate /* Link the new one in. */ 13047c478bd9Sstevel@tonic-gate ire->ire_ptpn = irep; 13057c478bd9Sstevel@tonic-gate 13067c478bd9Sstevel@tonic-gate /* 13077c478bd9Sstevel@tonic-gate * ire_walk routines de-reference ire_next without holding 13087c478bd9Sstevel@tonic-gate * a lock. Before we point to the new ire, we want to make 13097c478bd9Sstevel@tonic-gate * sure the store that sets the ire_next of the new ire 13107c478bd9Sstevel@tonic-gate * reaches global visibility, so that ire_walk routines 13117c478bd9Sstevel@tonic-gate * don't see a truncated list of ires i.e if the ire_next 13127c478bd9Sstevel@tonic-gate * of the new ire gets set after we do "*irep = ire" due 13137c478bd9Sstevel@tonic-gate * to re-ordering, the ire_walk thread will see a NULL 13147c478bd9Sstevel@tonic-gate * once it accesses the ire_next of the new ire. 13157c478bd9Sstevel@tonic-gate * membar_producer() makes sure that the following store 13167c478bd9Sstevel@tonic-gate * happens *after* all of the above stores. 13177c478bd9Sstevel@tonic-gate */ 13187c478bd9Sstevel@tonic-gate membar_producer(); 13197c478bd9Sstevel@tonic-gate *irep = ire; 13207c478bd9Sstevel@tonic-gate ire->ire_bucket = irb_ptr; 13217c478bd9Sstevel@tonic-gate /* 13227c478bd9Sstevel@tonic-gate * We return a bumped up IRE above. Keep it symmetrical 13237c478bd9Sstevel@tonic-gate * so that the callers will always have to release. This 13247c478bd9Sstevel@tonic-gate * helps the callers of this function because they continue 13257c478bd9Sstevel@tonic-gate * to use the IRE after adding and hence they don't have to 13267c478bd9Sstevel@tonic-gate * lookup again after we return the IRE. 13277c478bd9Sstevel@tonic-gate * 13287c478bd9Sstevel@tonic-gate * NOTE : We don't have to use atomics as this is appearing 13297c478bd9Sstevel@tonic-gate * in the list for the first time and no one else can bump 13307c478bd9Sstevel@tonic-gate * up the reference count on this yet. 13317c478bd9Sstevel@tonic-gate */ 1332bd670b35SErik Nordmark ire_refhold_locked(ire); 1333f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_inserted); 1334c793af95Ssangeeta 13357c478bd9Sstevel@tonic-gate irb_ptr->irb_ire_cnt++; 1336bd670b35SErik Nordmark if (irb_ptr->irb_marks & IRB_MARK_DYNAMIC) 1337c793af95Ssangeeta irb_ptr->irb_nire++; 1338c793af95Ssangeeta 1339bd670b35SErik Nordmark if (ire->ire_ill != NULL) { 1340bd670b35SErik Nordmark ire->ire_ill->ill_ire_cnt++; 1341bd670b35SErik Nordmark ASSERT(ire->ire_ill->ill_ire_cnt != 0); /* Wraparound */ 13427c478bd9Sstevel@tonic-gate } 13437c478bd9Sstevel@tonic-gate 13447c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 13457c478bd9Sstevel@tonic-gate 1346bd670b35SErik Nordmark /* Make any caching of the IREs be notified or updated */ 13477c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire, IRE_FLUSH_ADD); 1348bd670b35SErik Nordmark 1349bd670b35SErik Nordmark if (ire->ire_ill != NULL) 1350bd670b35SErik Nordmark ASSERT(!MUTEX_HELD(&ire->ire_ill->ill_lock)); 1351bd670b35SErik Nordmark irb_refrele(irb_ptr); 1352bd670b35SErik Nordmark return (ire); 13537c478bd9Sstevel@tonic-gate } 13547c478bd9Sstevel@tonic-gate 13557c478bd9Sstevel@tonic-gate /* 1356bd670b35SErik Nordmark * irb_refrele is the only caller of the function. ire_unlink calls to 13577c478bd9Sstevel@tonic-gate * do the final cleanup for this ire. 13587c478bd9Sstevel@tonic-gate */ 13597c478bd9Sstevel@tonic-gate void 13607c478bd9Sstevel@tonic-gate ire_cleanup(ire_t *ire) 13617c478bd9Sstevel@tonic-gate { 13627c478bd9Sstevel@tonic-gate ire_t *ire_next; 1363f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 13647c478bd9Sstevel@tonic-gate 13657c478bd9Sstevel@tonic-gate ASSERT(ire != NULL); 13667c478bd9Sstevel@tonic-gate 13677c478bd9Sstevel@tonic-gate while (ire != NULL) { 13687c478bd9Sstevel@tonic-gate ire_next = ire->ire_next; 13697c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 13707c478bd9Sstevel@tonic-gate ire_delete_v4(ire); 1371f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, 1372f4b3ec61Sdh155122 ire_stats_deleted); 13737c478bd9Sstevel@tonic-gate } else { 13747c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV6_VERSION); 13757c478bd9Sstevel@tonic-gate ire_delete_v6(ire); 1376f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v6, 1377f4b3ec61Sdh155122 ire_stats_deleted); 13787c478bd9Sstevel@tonic-gate } 13797c478bd9Sstevel@tonic-gate /* 13807c478bd9Sstevel@tonic-gate * Now it's really out of the list. Before doing the 13817c478bd9Sstevel@tonic-gate * REFRELE, set ire_next to NULL as ire_inactive asserts 13827c478bd9Sstevel@tonic-gate * so. 13837c478bd9Sstevel@tonic-gate */ 13847c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 1385bd670b35SErik Nordmark ire_refrele_notr(ire); 13867c478bd9Sstevel@tonic-gate ire = ire_next; 13877c478bd9Sstevel@tonic-gate } 13887c478bd9Sstevel@tonic-gate } 13897c478bd9Sstevel@tonic-gate 13907c478bd9Sstevel@tonic-gate /* 1391bd670b35SErik Nordmark * irb_refrele is the only caller of the function. It calls to unlink 13927c478bd9Sstevel@tonic-gate * all the CONDEMNED ires from this bucket. 13937c478bd9Sstevel@tonic-gate */ 13947c478bd9Sstevel@tonic-gate ire_t * 13957c478bd9Sstevel@tonic-gate ire_unlink(irb_t *irb) 13967c478bd9Sstevel@tonic-gate { 13977c478bd9Sstevel@tonic-gate ire_t *ire; 13987c478bd9Sstevel@tonic-gate ire_t *ire1; 13997c478bd9Sstevel@tonic-gate ire_t **ptpn; 14007c478bd9Sstevel@tonic-gate ire_t *ire_list = NULL; 14017c478bd9Sstevel@tonic-gate 14027c478bd9Sstevel@tonic-gate ASSERT(RW_WRITE_HELD(&irb->irb_lock)); 1403bd670b35SErik Nordmark ASSERT(((irb->irb_marks & IRB_MARK_DYNAMIC) && irb->irb_refcnt == 1) || 1404c793af95Ssangeeta (irb->irb_refcnt == 0)); 1405c793af95Ssangeeta ASSERT(irb->irb_marks & IRB_MARK_CONDEMNED); 14067c478bd9Sstevel@tonic-gate ASSERT(irb->irb_ire != NULL); 14077c478bd9Sstevel@tonic-gate 14087c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; ire = ire1) { 14097c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 1410bd670b35SErik Nordmark if (IRE_IS_CONDEMNED(ire)) { 14117c478bd9Sstevel@tonic-gate ptpn = ire->ire_ptpn; 14127c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 14137c478bd9Sstevel@tonic-gate if (ire1) 14147c478bd9Sstevel@tonic-gate ire1->ire_ptpn = ptpn; 14157c478bd9Sstevel@tonic-gate *ptpn = ire1; 14167c478bd9Sstevel@tonic-gate ire->ire_ptpn = NULL; 14177c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 1418bd670b35SErik Nordmark 14197c478bd9Sstevel@tonic-gate /* 1420bd670b35SErik Nordmark * We need to call ire_delete_v4 or ire_delete_v6 to 1421bd670b35SErik Nordmark * clean up dependents and the redirects pointing at 14227c478bd9Sstevel@tonic-gate * the default gateway. We need to drop the lock 14237c478bd9Sstevel@tonic-gate * as ire_flush_cache/ire_delete_host_redircts require 14247c478bd9Sstevel@tonic-gate * so. But we can't drop the lock, as ire_unlink needs 14257c478bd9Sstevel@tonic-gate * to atomically remove the ires from the list. 14267c478bd9Sstevel@tonic-gate * So, create a temporary list of CONDEMNED ires 14277c478bd9Sstevel@tonic-gate * for doing ire_delete_v4/ire_delete_v6 operations 14287c478bd9Sstevel@tonic-gate * later on. 14297c478bd9Sstevel@tonic-gate */ 14307c478bd9Sstevel@tonic-gate ire->ire_next = ire_list; 14317c478bd9Sstevel@tonic-gate ire_list = ire; 14327c478bd9Sstevel@tonic-gate } 14337c478bd9Sstevel@tonic-gate } 1434c793af95Ssangeeta irb->irb_marks &= ~IRB_MARK_CONDEMNED; 14357c478bd9Sstevel@tonic-gate return (ire_list); 14367c478bd9Sstevel@tonic-gate } 14377c478bd9Sstevel@tonic-gate 14387c478bd9Sstevel@tonic-gate /* 1439bd670b35SErik Nordmark * Clean up the radix node for this ire. Must be called by irb_refrele 1440c793af95Ssangeeta * when there are no ire's left in the bucket. Returns TRUE if the bucket 1441c793af95Ssangeeta * is deleted and freed. 1442c793af95Ssangeeta */ 1443c793af95Ssangeeta boolean_t 1444c793af95Ssangeeta irb_inactive(irb_t *irb) 1445c793af95Ssangeeta { 1446c793af95Ssangeeta struct rt_entry *rt; 1447c793af95Ssangeeta struct radix_node *rn; 1448f4b3ec61Sdh155122 ip_stack_t *ipst = irb->irb_ipst; 1449f4b3ec61Sdh155122 1450f4b3ec61Sdh155122 ASSERT(irb->irb_ipst != NULL); 1451c793af95Ssangeeta 1452c793af95Ssangeeta rt = IRB2RT(irb); 1453c793af95Ssangeeta rn = (struct radix_node *)rt; 1454c793af95Ssangeeta 1455c793af95Ssangeeta /* first remove it from the radix tree. */ 1456f4b3ec61Sdh155122 RADIX_NODE_HEAD_WLOCK(ipst->ips_ip_ftable); 1457c793af95Ssangeeta rw_enter(&irb->irb_lock, RW_WRITER); 1458c793af95Ssangeeta if (irb->irb_refcnt == 1 && irb->irb_nire == 0) { 1459f4b3ec61Sdh155122 rn = ipst->ips_ip_ftable->rnh_deladdr(rn->rn_key, rn->rn_mask, 1460f4b3ec61Sdh155122 ipst->ips_ip_ftable); 1461c793af95Ssangeeta DTRACE_PROBE1(irb__free, rt_t *, rt); 1462c793af95Ssangeeta ASSERT((void *)rn == (void *)rt); 1463c793af95Ssangeeta Free(rt, rt_entry_cache); 1464c793af95Ssangeeta /* irb_lock is freed */ 1465f4b3ec61Sdh155122 RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 1466c793af95Ssangeeta return (B_TRUE); 1467c793af95Ssangeeta } 1468c793af95Ssangeeta rw_exit(&irb->irb_lock); 1469f4b3ec61Sdh155122 RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 1470c793af95Ssangeeta return (B_FALSE); 14717c478bd9Sstevel@tonic-gate } 14727c478bd9Sstevel@tonic-gate 14737c478bd9Sstevel@tonic-gate /* 14747c478bd9Sstevel@tonic-gate * Delete the specified IRE. 1475bd670b35SErik Nordmark * We assume that if ire_bucket is not set then ire_ill->ill_ire_cnt was 1476bd670b35SErik Nordmark * not incremented i.e., that the insertion in the bucket and the increment 1477bd670b35SErik Nordmark * of that counter is done atomically. 14787c478bd9Sstevel@tonic-gate */ 14797c478bd9Sstevel@tonic-gate void 14807c478bd9Sstevel@tonic-gate ire_delete(ire_t *ire) 14817c478bd9Sstevel@tonic-gate { 14827c478bd9Sstevel@tonic-gate ire_t *ire1; 14837c478bd9Sstevel@tonic-gate ire_t **ptpn; 14847c478bd9Sstevel@tonic-gate irb_t *irb; 1485f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 14867c478bd9Sstevel@tonic-gate 1487c793af95Ssangeeta if ((irb = ire->ire_bucket) == NULL) { 14887c478bd9Sstevel@tonic-gate /* 14897c478bd9Sstevel@tonic-gate * It was never inserted in the list. Should call REFRELE 14907c478bd9Sstevel@tonic-gate * to free this IRE. 14917c478bd9Sstevel@tonic-gate */ 1492f1c454b4SSowmini Varadhan ire_make_condemned(ire); 1493bd670b35SErik Nordmark ire_refrele_notr(ire); 14947c478bd9Sstevel@tonic-gate return; 14957c478bd9Sstevel@tonic-gate } 14967c478bd9Sstevel@tonic-gate 14977c478bd9Sstevel@tonic-gate /* 1498bd670b35SErik Nordmark * Move the use counts from an IRE_IF_CLONE to its parent 1499bd670b35SErik Nordmark * IRE_INTERFACE. 1500bd670b35SErik Nordmark * We need to do this before acquiring irb_lock. 15017c478bd9Sstevel@tonic-gate */ 1502bd670b35SErik Nordmark if (ire->ire_type & IRE_IF_CLONE) { 1503bd670b35SErik Nordmark ire_t *parent; 1504bd670b35SErik Nordmark 1505bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 1506bd670b35SErik Nordmark if ((parent = ire->ire_dep_parent) != NULL) { 1507bd670b35SErik Nordmark parent->ire_ob_pkt_count += ire->ire_ob_pkt_count; 1508bd670b35SErik Nordmark parent->ire_ib_pkt_count += ire->ire_ib_pkt_count; 1509bd670b35SErik Nordmark ire->ire_ob_pkt_count = 0; 1510bd670b35SErik Nordmark ire->ire_ib_pkt_count = 0; 1511bd670b35SErik Nordmark } 1512bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 15137c478bd9Sstevel@tonic-gate } 15147c478bd9Sstevel@tonic-gate 1515bd670b35SErik Nordmark rw_enter(&irb->irb_lock, RW_WRITER); 15167c478bd9Sstevel@tonic-gate if (ire->ire_ptpn == NULL) { 15177c478bd9Sstevel@tonic-gate /* 15187c478bd9Sstevel@tonic-gate * Some other thread has removed us from the list. 15197c478bd9Sstevel@tonic-gate * It should have done the REFRELE for us. 15207c478bd9Sstevel@tonic-gate */ 15217c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 15227c478bd9Sstevel@tonic-gate return; 15237c478bd9Sstevel@tonic-gate } 15247c478bd9Sstevel@tonic-gate 1525bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(ire)) { 1526bd670b35SErik Nordmark /* Is this an IRE representing multiple duplicate entries? */ 1527bd670b35SErik Nordmark ASSERT(ire->ire_identical_ref >= 1); 1528bd670b35SErik Nordmark if (atomic_add_32_nv(&ire->ire_identical_ref, -1) != 0) { 1529bd670b35SErik Nordmark /* Removed one of the identical parties */ 1530bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 1531bd670b35SErik Nordmark return; 15329a09d68dSja97890 } 1533bd670b35SErik Nordmark 1534bd670b35SErik Nordmark irb->irb_ire_cnt--; 1535bd670b35SErik Nordmark ire_make_condemned(ire); 15369a09d68dSja97890 } 15379a09d68dSja97890 15387c478bd9Sstevel@tonic-gate if (irb->irb_refcnt != 0) { 15397c478bd9Sstevel@tonic-gate /* 15407c478bd9Sstevel@tonic-gate * The last thread to leave this bucket will 15417c478bd9Sstevel@tonic-gate * delete this ire. 15427c478bd9Sstevel@tonic-gate */ 1543c793af95Ssangeeta irb->irb_marks |= IRB_MARK_CONDEMNED; 15447c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 15457c478bd9Sstevel@tonic-gate return; 15467c478bd9Sstevel@tonic-gate } 15477c478bd9Sstevel@tonic-gate 15487c478bd9Sstevel@tonic-gate /* 15497c478bd9Sstevel@tonic-gate * Normally to delete an ire, we walk the bucket. While we 15507c478bd9Sstevel@tonic-gate * walk the bucket, we normally bump up irb_refcnt and hence 15517c478bd9Sstevel@tonic-gate * we return from above where we mark CONDEMNED and the ire 15527c478bd9Sstevel@tonic-gate * gets deleted from ire_unlink. This case is where somebody 15537c478bd9Sstevel@tonic-gate * knows the ire e.g by doing a lookup, and wants to delete the 15547c478bd9Sstevel@tonic-gate * IRE. irb_refcnt would be 0 in this case if nobody is walking 15557c478bd9Sstevel@tonic-gate * the bucket. 15567c478bd9Sstevel@tonic-gate */ 15577c478bd9Sstevel@tonic-gate ptpn = ire->ire_ptpn; 15587c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 15597c478bd9Sstevel@tonic-gate if (ire1 != NULL) 15607c478bd9Sstevel@tonic-gate ire1->ire_ptpn = ptpn; 15617c478bd9Sstevel@tonic-gate ASSERT(ptpn != NULL); 15627c478bd9Sstevel@tonic-gate *ptpn = ire1; 15637c478bd9Sstevel@tonic-gate ire->ire_ptpn = NULL; 15647c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 15657c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 1566f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v6, ire_stats_deleted); 15677c478bd9Sstevel@tonic-gate } else { 1568f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_deleted); 15697c478bd9Sstevel@tonic-gate } 15707c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 15717c478bd9Sstevel@tonic-gate 1572bd670b35SErik Nordmark /* Cleanup dependents and related stuff */ 15737c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 15747c478bd9Sstevel@tonic-gate ire_delete_v6(ire); 15757c478bd9Sstevel@tonic-gate } else { 15767c478bd9Sstevel@tonic-gate ire_delete_v4(ire); 15777c478bd9Sstevel@tonic-gate } 15787c478bd9Sstevel@tonic-gate /* 15797c478bd9Sstevel@tonic-gate * We removed it from the list. Decrement the 15807c478bd9Sstevel@tonic-gate * reference count. 15817c478bd9Sstevel@tonic-gate */ 1582bd670b35SErik Nordmark ire_refrele_notr(ire); 15837c478bd9Sstevel@tonic-gate } 15847c478bd9Sstevel@tonic-gate 15857c478bd9Sstevel@tonic-gate /* 15867c478bd9Sstevel@tonic-gate * Delete the specified IRE. 15877c478bd9Sstevel@tonic-gate * All calls should use ire_delete(). 15887c478bd9Sstevel@tonic-gate * Sometimes called as writer though not required by this function. 15897c478bd9Sstevel@tonic-gate * 15907c478bd9Sstevel@tonic-gate * NOTE : This function is called only if the ire was added 15917c478bd9Sstevel@tonic-gate * in the list. 15927c478bd9Sstevel@tonic-gate */ 15937c478bd9Sstevel@tonic-gate static void 15947c478bd9Sstevel@tonic-gate ire_delete_v4(ire_t *ire) 15957c478bd9Sstevel@tonic-gate { 1596f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 1597f4b3ec61Sdh155122 15987c478bd9Sstevel@tonic-gate ASSERT(ire->ire_refcnt >= 1); 15997c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 16007c478bd9Sstevel@tonic-gate 16017c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire, IRE_FLUSH_DELETE); 16027c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT) { 16037c478bd9Sstevel@tonic-gate /* 16047c478bd9Sstevel@tonic-gate * when a default gateway is going away 16057c478bd9Sstevel@tonic-gate * delete all the host redirects pointing at that 16067c478bd9Sstevel@tonic-gate * gateway. 16077c478bd9Sstevel@tonic-gate */ 1608f4b3ec61Sdh155122 ire_delete_host_redirects(ire->ire_gateway_addr, ipst); 16097c478bd9Sstevel@tonic-gate } 1610bd670b35SErik Nordmark 1611bd670b35SErik Nordmark /* 1612bd670b35SErik Nordmark * If we are deleting an IRE_INTERFACE then we make sure we also 1613bd670b35SErik Nordmark * delete any IRE_IF_CLONE that has been created from it. 1614bd670b35SErik Nordmark * Those are always in ire_dep_children. 1615bd670b35SErik Nordmark */ 1616bd670b35SErik Nordmark if ((ire->ire_type & IRE_INTERFACE) && ire->ire_dep_children != NULL) 1617bd670b35SErik Nordmark ire_dep_delete_if_clone(ire); 1618bd670b35SErik Nordmark 1619bd670b35SErik Nordmark /* Remove from parent dependencies and child */ 1620bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_WRITER); 1621bd670b35SErik Nordmark if (ire->ire_dep_parent != NULL) 1622bd670b35SErik Nordmark ire_dep_remove(ire); 1623bd670b35SErik Nordmark 1624bd670b35SErik Nordmark while (ire->ire_dep_children != NULL) 1625bd670b35SErik Nordmark ire_dep_remove(ire->ire_dep_children); 1626bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 16277c478bd9Sstevel@tonic-gate } 16287c478bd9Sstevel@tonic-gate 16297c478bd9Sstevel@tonic-gate /* 1630bd670b35SErik Nordmark * ire_refrele is the only caller of the function. It calls 16317c478bd9Sstevel@tonic-gate * to free the ire when the reference count goes to zero. 16327c478bd9Sstevel@tonic-gate */ 16337c478bd9Sstevel@tonic-gate void 16347c478bd9Sstevel@tonic-gate ire_inactive(ire_t *ire) 16357c478bd9Sstevel@tonic-gate { 1636bd670b35SErik Nordmark ill_t *ill; 1637c793af95Ssangeeta irb_t *irb; 1638f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 16397c478bd9Sstevel@tonic-gate 16407c478bd9Sstevel@tonic-gate ASSERT(ire->ire_refcnt == 0); 16417c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ptpn == NULL); 16427c478bd9Sstevel@tonic-gate ASSERT(ire->ire_next == NULL); 16437c478bd9Sstevel@tonic-gate 1644bd670b35SErik Nordmark /* Count how many condemned ires for kmem_cache callback */ 1645f1c454b4SSowmini Varadhan ASSERT(IRE_IS_CONDEMNED(ire)); 1646bd670b35SErik Nordmark atomic_add_32(&ipst->ips_num_ire_condemned, -1); 1647bd670b35SErik Nordmark 1648c793af95Ssangeeta if (ire->ire_gw_secattr != NULL) { 1649c793af95Ssangeeta ire_gw_secattr_free(ire->ire_gw_secattr); 1650c793af95Ssangeeta ire->ire_gw_secattr = NULL; 1651c793af95Ssangeeta } 1652c793af95Ssangeeta 1653bd670b35SErik Nordmark /* 1654bd670b35SErik Nordmark * ire_nce_cache is cleared in ire_delete, and we make sure we don't 1655bd670b35SErik Nordmark * set it once the ire is marked condemned. 1656bd670b35SErik Nordmark */ 1657bd670b35SErik Nordmark ASSERT(ire->ire_nce_cache == NULL); 16587c478bd9Sstevel@tonic-gate 16597c478bd9Sstevel@tonic-gate /* 1660bd670b35SErik Nordmark * Since any parent would have a refhold on us they would already 1661bd670b35SErik Nordmark * have been removed. 16627c478bd9Sstevel@tonic-gate */ 1663bd670b35SErik Nordmark ASSERT(ire->ire_dep_parent == NULL); 1664bd670b35SErik Nordmark ASSERT(ire->ire_dep_sib_next == NULL); 1665bd670b35SErik Nordmark ASSERT(ire->ire_dep_sib_ptpn == NULL); 16667c478bd9Sstevel@tonic-gate 1667bd670b35SErik Nordmark /* 1668bd670b35SErik Nordmark * Since any children would have a refhold on us they should have 1669bd670b35SErik Nordmark * already been removed. 1670bd670b35SErik Nordmark */ 1671bd670b35SErik Nordmark ASSERT(ire->ire_dep_children == NULL); 1672bd670b35SErik Nordmark 1673bd670b35SErik Nordmark /* 1674bd670b35SErik Nordmark * ill_ire_ref is increased when the IRE is inserted in the 1675bd670b35SErik Nordmark * bucket - not when the IRE is created. 1676bd670b35SErik Nordmark */ 1677bd670b35SErik Nordmark irb = ire->ire_bucket; 1678bd670b35SErik Nordmark ill = ire->ire_ill; 1679bd670b35SErik Nordmark if (irb != NULL && ill != NULL) { 16807c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 1681bd670b35SErik Nordmark ASSERT(ill->ill_ire_cnt != 0); 1682bd670b35SErik Nordmark DTRACE_PROBE3(ill__decr__cnt, (ill_t *), ill, 1683968d2fd1Ssowmini (char *), "ire", (void *), ire); 1684bd670b35SErik Nordmark ill->ill_ire_cnt--; 1685bd670b35SErik Nordmark if (ILL_DOWN_OK(ill)) { 16867c478bd9Sstevel@tonic-gate /* Drops the ill lock */ 16877c478bd9Sstevel@tonic-gate ipif_ill_refrele_tail(ill); 16887c478bd9Sstevel@tonic-gate } else { 16897c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 16907c478bd9Sstevel@tonic-gate } 16917c478bd9Sstevel@tonic-gate } 1692bd670b35SErik Nordmark ire->ire_ill = NULL; 1693bd670b35SErik Nordmark 16947c478bd9Sstevel@tonic-gate /* This should be true for both V4 and V6 */ 1695bd670b35SErik Nordmark if (irb != NULL && (irb->irb_marks & IRB_MARK_DYNAMIC)) { 1696c793af95Ssangeeta rw_enter(&irb->irb_lock, RW_WRITER); 1697c793af95Ssangeeta irb->irb_nire--; 1698c793af95Ssangeeta /* 1699c793af95Ssangeeta * Instead of examining the conditions for freeing 1700c793af95Ssangeeta * the radix node here, we do it by calling 1701bd670b35SErik Nordmark * irb_refrele which is a single point in the code 1702c793af95Ssangeeta * that embeds that logic. Bump up the refcnt to 1703bd670b35SErik Nordmark * be able to call irb_refrele 1704c793af95Ssangeeta */ 1705bd670b35SErik Nordmark irb_refhold_locked(irb); 1706c793af95Ssangeeta rw_exit(&irb->irb_lock); 1707bd670b35SErik Nordmark irb_refrele(irb); 1708c793af95Ssangeeta } 17097c478bd9Sstevel@tonic-gate 17106a8288c7Scarlsonj #ifdef DEBUG 17116a8288c7Scarlsonj ire_trace_cleanup(ire); 17127c478bd9Sstevel@tonic-gate #endif 17137c478bd9Sstevel@tonic-gate mutex_destroy(&ire->ire_lock); 17147c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 1715f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v6, ire_stats_freed); 17167c478bd9Sstevel@tonic-gate } else { 1717f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_freed); 17187c478bd9Sstevel@tonic-gate } 17197c478bd9Sstevel@tonic-gate kmem_cache_free(ire_cache, ire); 17207c478bd9Sstevel@tonic-gate } 17217c478bd9Sstevel@tonic-gate 17227c478bd9Sstevel@tonic-gate /* 1723bd670b35SErik Nordmark * ire_update_generation is the callback function provided by 1724bd670b35SErik Nordmark * ire_get_bucket() to update the generation number of any 1725bd670b35SErik Nordmark * matching shorter route when a new route is added. 1726bd670b35SErik Nordmark * 1727bd670b35SErik Nordmark * This fucntion always returns a failure return (B_FALSE) 1728bd670b35SErik Nordmark * to force the caller (rn_matchaddr_args) 1729bd670b35SErik Nordmark * to back-track up the tree looking for shorter matches. 17307c478bd9Sstevel@tonic-gate */ 1731bd670b35SErik Nordmark /* ARGSUSED */ 1732bd670b35SErik Nordmark static boolean_t 1733bd670b35SErik Nordmark ire_update_generation(struct radix_node *rn, void *arg) 17347c478bd9Sstevel@tonic-gate { 1735bd670b35SErik Nordmark struct rt_entry *rt = (struct rt_entry *)rn; 17367c478bd9Sstevel@tonic-gate 1737bd670b35SErik Nordmark /* We need to handle all in the same bucket */ 1738bd670b35SErik Nordmark irb_increment_generation(&rt->rt_irb); 1739bd670b35SErik Nordmark return (B_FALSE); 17407c478bd9Sstevel@tonic-gate } 17417c478bd9Sstevel@tonic-gate 17427c478bd9Sstevel@tonic-gate /* 1743bd670b35SErik Nordmark * Take care of all the generation numbers in the bucket. 1744bd670b35SErik Nordmark */ 1745bd670b35SErik Nordmark void 1746bd670b35SErik Nordmark irb_increment_generation(irb_t *irb) 1747bd670b35SErik Nordmark { 1748bd670b35SErik Nordmark ire_t *ire; 1749f1c454b4SSowmini Varadhan ip_stack_t *ipst; 1750bd670b35SErik Nordmark 1751bd670b35SErik Nordmark if (irb == NULL || irb->irb_ire_cnt == 0) 1752bd670b35SErik Nordmark return; 1753bd670b35SErik Nordmark 1754f1c454b4SSowmini Varadhan ipst = irb->irb_ipst; 1755f1c454b4SSowmini Varadhan /* 1756f1c454b4SSowmini Varadhan * we cannot do an irb_refhold/irb_refrele here as the caller 1757f1c454b4SSowmini Varadhan * already has the global RADIX_NODE_HEAD_WLOCK, and the irb_refrele 1758f1c454b4SSowmini Varadhan * may result in an attempt to free the irb_t, which also needs 1759f1c454b4SSowmini Varadhan * the RADIX_NODE_HEAD lock. However, since we want to traverse the 1760f1c454b4SSowmini Varadhan * irb_ire list without fear of having a condemned ire removed from 1761f1c454b4SSowmini Varadhan * the list, we acquire the irb_lock as WRITER. Moreover, since 1762f1c454b4SSowmini Varadhan * the ire_generation increments are done under the ire_dep_lock, 1763f1c454b4SSowmini Varadhan * acquire the locks in the prescribed lock order first. 1764f1c454b4SSowmini Varadhan */ 1765f1c454b4SSowmini Varadhan rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 1766f1c454b4SSowmini Varadhan rw_enter(&irb->irb_lock, RW_WRITER); 1767bd670b35SErik Nordmark for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 1768bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(ire)) 1769bd670b35SErik Nordmark ire_increment_generation(ire); /* Ourselves */ 1770f1c454b4SSowmini Varadhan ire_dep_incr_generation_locked(ire); /* Dependants */ 1771bd670b35SErik Nordmark } 1772f1c454b4SSowmini Varadhan rw_exit(&irb->irb_lock); 1773f1c454b4SSowmini Varadhan rw_exit(&ipst->ips_ire_dep_lock); 1774bd670b35SErik Nordmark } 1775bd670b35SErik Nordmark 1776bd670b35SErik Nordmark /* 1777bd670b35SErik Nordmark * When an IRE is added or deleted this routine is called to make sure 1778bd670b35SErik Nordmark * any caching of IRE information is notified or updated. 17797c478bd9Sstevel@tonic-gate * 17807c478bd9Sstevel@tonic-gate * The flag argument indicates if the flush request is due to addition 1781bd670b35SErik Nordmark * of new route (IRE_FLUSH_ADD), deletion of old route (IRE_FLUSH_DELETE), 1782bd670b35SErik Nordmark * or a change to ire_gateway_addr (IRE_FLUSH_GWCHANGE). 17837c478bd9Sstevel@tonic-gate */ 17847c478bd9Sstevel@tonic-gate void 17857c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire_t *ire, int flag) 17867c478bd9Sstevel@tonic-gate { 1787bd670b35SErik Nordmark irb_t *irb = ire->ire_bucket; 1788bd670b35SErik Nordmark struct rt_entry *rt = IRB2RT(irb); 1789f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 17907c478bd9Sstevel@tonic-gate 1791bd670b35SErik Nordmark /* 1792bd670b35SErik Nordmark * IRE_IF_CLONE ire's don't provide any new information 1793bd670b35SErik Nordmark * than the parent from which they are cloned, so don't 1794bd670b35SErik Nordmark * perturb the generation numbers. 1795bd670b35SErik Nordmark */ 1796bd670b35SErik Nordmark if (ire->ire_type & IRE_IF_CLONE) 17977c478bd9Sstevel@tonic-gate return; 17987c478bd9Sstevel@tonic-gate 17997c478bd9Sstevel@tonic-gate /* 1800bd670b35SErik Nordmark * Ensure that an ire_add during a lookup serializes the updates of the 1801bd670b35SErik Nordmark * generation numbers under the radix head lock so that the lookup gets 1802bd670b35SErik Nordmark * either the old ire and old generation number, or a new ire and new 1803bd670b35SErik Nordmark * generation number. 18047c478bd9Sstevel@tonic-gate */ 1805bd670b35SErik Nordmark RADIX_NODE_HEAD_WLOCK(ipst->ips_ip_ftable); 1806bd670b35SErik Nordmark 1807bd670b35SErik Nordmark /* 1808bd670b35SErik Nordmark * If a route was just added, we need to notify everybody that 1809bd670b35SErik Nordmark * has cached an IRE_NOROUTE since there might now be a better 1810bd670b35SErik Nordmark * route for them. 1811bd670b35SErik Nordmark */ 18127c478bd9Sstevel@tonic-gate if (flag == IRE_FLUSH_ADD) { 1813bd670b35SErik Nordmark ire_increment_generation(ipst->ips_ire_reject_v4); 1814bd670b35SErik Nordmark ire_increment_generation(ipst->ips_ire_blackhole_v4); 1815bd670b35SErik Nordmark } 1816bd670b35SErik Nordmark 1817bd670b35SErik Nordmark /* Adding a default can't otherwise provide a better route */ 1818bd670b35SErik Nordmark if (ire->ire_type == IRE_DEFAULT && flag == IRE_FLUSH_ADD) { 1819bd670b35SErik Nordmark RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 1820bd670b35SErik Nordmark return; 1821bd670b35SErik Nordmark } 1822bd670b35SErik Nordmark 1823bd670b35SErik Nordmark switch (flag) { 1824bd670b35SErik Nordmark case IRE_FLUSH_DELETE: 1825bd670b35SErik Nordmark case IRE_FLUSH_GWCHANGE: 18267c478bd9Sstevel@tonic-gate /* 1827bd670b35SErik Nordmark * Update ire_generation for all ire_dep_children chains 1828bd670b35SErik Nordmark * starting with this IRE 18297c478bd9Sstevel@tonic-gate */ 1830bd670b35SErik Nordmark ire_dep_incr_generation(ire); 1831bd670b35SErik Nordmark break; 1832bd670b35SErik Nordmark case IRE_FLUSH_ADD: 18337c478bd9Sstevel@tonic-gate /* 1834bd670b35SErik Nordmark * Update the generation numbers of all shorter matching routes. 1835bd670b35SErik Nordmark * ire_update_generation takes care of the dependants by 1836bd670b35SErik Nordmark * using ire_dep_incr_generation. 18377c478bd9Sstevel@tonic-gate */ 1838bd670b35SErik Nordmark (void) ipst->ips_ip_ftable->rnh_matchaddr_args(&rt->rt_dst, 1839bd670b35SErik Nordmark ipst->ips_ip_ftable, ire_update_generation, NULL); 1840bd670b35SErik Nordmark break; 18417c478bd9Sstevel@tonic-gate } 1842bd670b35SErik Nordmark RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 18437c478bd9Sstevel@tonic-gate } 18447c478bd9Sstevel@tonic-gate 18457c478bd9Sstevel@tonic-gate /* 18467c478bd9Sstevel@tonic-gate * Matches the arguments passed with the values in the ire. 18477c478bd9Sstevel@tonic-gate * 1848bd670b35SErik Nordmark * Note: for match types that match using "ill" passed in, ill 18497c478bd9Sstevel@tonic-gate * must be checked for non-NULL before calling this routine. 18507c478bd9Sstevel@tonic-gate */ 1851c793af95Ssangeeta boolean_t 18527c478bd9Sstevel@tonic-gate ire_match_args(ire_t *ire, ipaddr_t addr, ipaddr_t mask, ipaddr_t gateway, 1853bd670b35SErik Nordmark int type, const ill_t *ill, zoneid_t zoneid, 1854bd670b35SErik Nordmark const ts_label_t *tsl, int match_flags) 18557c478bd9Sstevel@tonic-gate { 18567c478bd9Sstevel@tonic-gate ill_t *ire_ill = NULL, *dst_ill; 1857bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 18587c478bd9Sstevel@tonic-gate 18597c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 18607c478bd9Sstevel@tonic-gate ASSERT((ire->ire_addr & ~ire->ire_mask) == 0); 1861e11c3f44Smeem ASSERT((!(match_flags & MATCH_IRE_ILL)) || 1862bd670b35SErik Nordmark (ill != NULL && !ill->ill_isv6)); 18637c478bd9Sstevel@tonic-gate 18647c478bd9Sstevel@tonic-gate /* 1865bd670b35SErik Nordmark * If MATCH_IRE_TESTHIDDEN is set, then only return the IRE if it is 1866bd670b35SErik Nordmark * in fact hidden, to ensure the caller gets the right one. 18677c478bd9Sstevel@tonic-gate */ 1868bd670b35SErik Nordmark if (ire->ire_testhidden) { 1869bd670b35SErik Nordmark if (!(match_flags & MATCH_IRE_TESTHIDDEN)) 18707c478bd9Sstevel@tonic-gate return (B_FALSE); 1871e11c3f44Smeem } 18727c478bd9Sstevel@tonic-gate 187345916cd2Sjpk if (zoneid != ALL_ZONES && zoneid != ire->ire_zoneid && 187445916cd2Sjpk ire->ire_zoneid != ALL_ZONES) { 18757c478bd9Sstevel@tonic-gate /* 1876bd670b35SErik Nordmark * If MATCH_IRE_ZONEONLY has been set and the supplied zoneid 1877bd670b35SErik Nordmark * does not match that of ire_zoneid, a failure to 18787c478bd9Sstevel@tonic-gate * match is reported at this point. Otherwise, since some IREs 18797c478bd9Sstevel@tonic-gate * that are available in the global zone can be used in local 18807c478bd9Sstevel@tonic-gate * zones, additional checks need to be performed: 18817c478bd9Sstevel@tonic-gate * 1882bd670b35SErik Nordmark * IRE_LOOPBACK 18837c478bd9Sstevel@tonic-gate * entries should never be matched in this situation. 1884bd670b35SErik Nordmark * Each zone has its own IRE_LOOPBACK. 18857c478bd9Sstevel@tonic-gate * 1886bd670b35SErik Nordmark * IRE_LOCAL 1887bd670b35SErik Nordmark * We allow them for any zoneid. ire_route_recursive 1888bd670b35SErik Nordmark * does additional checks when 1889bd670b35SErik Nordmark * ip_restrict_interzone_loopback is set. 18907c478bd9Sstevel@tonic-gate * 1891bd670b35SErik Nordmark * If ill_usesrc_ifindex is set 1892bd670b35SErik Nordmark * Then we check if the zone has a valid source address 1893bd670b35SErik Nordmark * on the usesrc ill. 18947c478bd9Sstevel@tonic-gate * 1895bd670b35SErik Nordmark * If ire_ill is set, then check that the zone has an ipif 1896bd670b35SErik Nordmark * on that ill. 1897bd670b35SErik Nordmark * 1898bd670b35SErik Nordmark * Outside of this function (in ire_round_robin) we check 1899bd670b35SErik Nordmark * that any IRE_OFFLINK has a gateway that reachable from the 1900bd670b35SErik Nordmark * zone when we have multiple choices (ECMP). 19017c478bd9Sstevel@tonic-gate */ 19027c478bd9Sstevel@tonic-gate if (match_flags & MATCH_IRE_ZONEONLY) 19037c478bd9Sstevel@tonic-gate return (B_FALSE); 1904bd670b35SErik Nordmark if (ire->ire_type & IRE_LOOPBACK) 19057c478bd9Sstevel@tonic-gate return (B_FALSE); 1906bd670b35SErik Nordmark 1907bd670b35SErik Nordmark if (ire->ire_type & IRE_LOCAL) 1908bd670b35SErik Nordmark goto matchit; 1909bd670b35SErik Nordmark 19107c478bd9Sstevel@tonic-gate /* 1911bd670b35SErik Nordmark * The normal case of IRE_ONLINK has a matching zoneid. 1912bd670b35SErik Nordmark * Here we handle the case when shared-IP zones have been 1913bd670b35SErik Nordmark * configured with IP addresses on vniN. In that case it 1914bd670b35SErik Nordmark * is ok for traffic from a zone to use IRE_ONLINK routes 1915bd670b35SErik Nordmark * if the ill has a usesrc pointing at vniN 19167c478bd9Sstevel@tonic-gate */ 1917bd670b35SErik Nordmark dst_ill = ire->ire_ill; 1918bd670b35SErik Nordmark if (ire->ire_type & IRE_ONLINK) { 1919bd670b35SErik Nordmark uint_t ifindex; 1920bd670b35SErik Nordmark 1921bd670b35SErik Nordmark /* 1922bd670b35SErik Nordmark * Note there is no IRE_INTERFACE on vniN thus 1923bd670b35SErik Nordmark * can't do an IRE lookup for a matching route. 1924bd670b35SErik Nordmark */ 1925bd670b35SErik Nordmark ifindex = dst_ill->ill_usesrc_ifindex; 1926bd670b35SErik Nordmark if (ifindex == 0) 1927bd670b35SErik Nordmark return (B_FALSE); 1928bd670b35SErik Nordmark 19297c478bd9Sstevel@tonic-gate /* 19307c478bd9Sstevel@tonic-gate * If there is a usable source address in the 1931bd670b35SErik Nordmark * zone, then it's ok to return this IRE_INTERFACE 19327c478bd9Sstevel@tonic-gate */ 1933bd670b35SErik Nordmark if (!ipif_zone_avail(ifindex, dst_ill->ill_isv6, 1934bd670b35SErik Nordmark zoneid, ipst)) { 1935bd670b35SErik Nordmark ip3dbg(("ire_match_args: no usrsrc for zone" 19367c478bd9Sstevel@tonic-gate " dst_ill %p\n", (void *)dst_ill)); 19377c478bd9Sstevel@tonic-gate return (B_FALSE); 19387c478bd9Sstevel@tonic-gate } 19397c478bd9Sstevel@tonic-gate } 1940bd670b35SErik Nordmark /* 1941bd670b35SErik Nordmark * For exampe, with 1942bd670b35SErik Nordmark * route add 11.0.0.0 gw1 -ifp bge0 1943bd670b35SErik Nordmark * route add 11.0.0.0 gw2 -ifp bge1 1944bd670b35SErik Nordmark * this code would differentiate based on 1945bd670b35SErik Nordmark * where the sending zone has addresses. 1946bd670b35SErik Nordmark * Only if the zone has an address on bge0 can it use the first 1947bd670b35SErik Nordmark * route. It isn't clear if this behavior is documented 1948bd670b35SErik Nordmark * anywhere. 1949bd670b35SErik Nordmark */ 1950bd670b35SErik Nordmark if (dst_ill != NULL && (ire->ire_type & IRE_OFFLINK)) { 19517c478bd9Sstevel@tonic-gate ipif_t *tipif; 19527c478bd9Sstevel@tonic-gate 1953bd670b35SErik Nordmark mutex_enter(&dst_ill->ill_lock); 1954bd670b35SErik Nordmark for (tipif = dst_ill->ill_ipif; 19557c478bd9Sstevel@tonic-gate tipif != NULL; tipif = tipif->ipif_next) { 1956bd670b35SErik Nordmark if (!IPIF_IS_CONDEMNED(tipif) && 19577c478bd9Sstevel@tonic-gate (tipif->ipif_flags & IPIF_UP) && 195845916cd2Sjpk (tipif->ipif_zoneid == zoneid || 195945916cd2Sjpk tipif->ipif_zoneid == ALL_ZONES)) 19607c478bd9Sstevel@tonic-gate break; 19617c478bd9Sstevel@tonic-gate } 1962bd670b35SErik Nordmark mutex_exit(&dst_ill->ill_lock); 19637c478bd9Sstevel@tonic-gate if (tipif == NULL) { 19647c478bd9Sstevel@tonic-gate return (B_FALSE); 19657c478bd9Sstevel@tonic-gate } 19667c478bd9Sstevel@tonic-gate } 19677c478bd9Sstevel@tonic-gate } 19687c478bd9Sstevel@tonic-gate 1969bd670b35SErik Nordmark matchit: 1970e11c3f44Smeem if (match_flags & MATCH_IRE_ILL) { 1971bd670b35SErik Nordmark ire_ill = ire->ire_ill; 1972bd670b35SErik Nordmark 1973bd670b35SErik Nordmark /* 1974bd670b35SErik Nordmark * If asked to match an ill, we *must* match 1975bd670b35SErik Nordmark * on the ire_ill for ipmp test addresses, or 1976bd670b35SErik Nordmark * any of the ill in the group for data addresses. 1977bd670b35SErik Nordmark * If we don't, we may as well fail. 1978bd670b35SErik Nordmark * However, we need an exception for IRE_LOCALs to ensure 1979bd670b35SErik Nordmark * we loopback packets even sent to test addresses on different 1980bd670b35SErik Nordmark * interfaces in the group. 1981bd670b35SErik Nordmark */ 1982bd670b35SErik Nordmark if ((match_flags & MATCH_IRE_TESTHIDDEN) && 1983bd670b35SErik Nordmark !(ire->ire_type & IRE_LOCAL)) { 1984bd670b35SErik Nordmark if (ire->ire_ill != ill) 1985bd670b35SErik Nordmark return (B_FALSE); 1986bd670b35SErik Nordmark } else { 1987bd670b35SErik Nordmark match_flags &= ~MATCH_IRE_TESTHIDDEN; 1988bd670b35SErik Nordmark /* 1989bd670b35SErik Nordmark * We know that ill is not NULL, but ire_ill could be 1990bd670b35SErik Nordmark * NULL 1991bd670b35SErik Nordmark */ 1992bd670b35SErik Nordmark if (ire_ill == NULL || !IS_ON_SAME_LAN(ill, ire_ill)) 1993bd670b35SErik Nordmark return (B_FALSE); 1994bd670b35SErik Nordmark } 19957c478bd9Sstevel@tonic-gate } 19967c478bd9Sstevel@tonic-gate 19977c478bd9Sstevel@tonic-gate if ((ire->ire_addr == (addr & mask)) && 19987c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_GW)) || 19997c478bd9Sstevel@tonic-gate (ire->ire_gateway_addr == gateway)) && 2000bd670b35SErik Nordmark ((!(match_flags & MATCH_IRE_TYPE)) || (ire->ire_type & type)) && 2001bd670b35SErik Nordmark ((!(match_flags & MATCH_IRE_TESTHIDDEN)) || ire->ire_testhidden) && 2002bd670b35SErik Nordmark ((!(match_flags & MATCH_IRE_MASK)) || (ire->ire_mask == mask)) && 200345916cd2Sjpk ((!(match_flags & MATCH_IRE_SECATTR)) || 200445916cd2Sjpk (!is_system_labeled()) || 200545916cd2Sjpk (tsol_ire_match_gwattr(ire, tsl) == 0))) { 20067c478bd9Sstevel@tonic-gate /* We found the matched IRE */ 20077c478bd9Sstevel@tonic-gate return (B_TRUE); 20087c478bd9Sstevel@tonic-gate } 20097c478bd9Sstevel@tonic-gate return (B_FALSE); 20107c478bd9Sstevel@tonic-gate } 20117c478bd9Sstevel@tonic-gate 20127c478bd9Sstevel@tonic-gate /* 2013e11c3f44Smeem * Check if the IRE_LOCAL uses the same ill as another route would use. 2014aa2eaee6Snordmark * If there is no alternate route, or the alternate is a REJECT or BLACKHOLE, 2015aa2eaee6Snordmark * then we don't allow this IRE_LOCAL to be used. 2016bd670b35SErik Nordmark * We always return an IRE; will be RTF_REJECT if no route available. 2017bd670b35SErik Nordmark */ 2018bd670b35SErik Nordmark ire_t * 2019bd670b35SErik Nordmark ire_alt_local(ire_t *ire, zoneid_t zoneid, const ts_label_t *tsl, 2020bd670b35SErik Nordmark const ill_t *ill, uint_t *generationp) 2021bd670b35SErik Nordmark { 2022bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 2023bd670b35SErik Nordmark ire_t *alt_ire; 2024bd670b35SErik Nordmark uint_t ire_type; 2025bd670b35SErik Nordmark uint_t generation; 2026bd670b35SErik Nordmark uint_t match_flags; 2027bd670b35SErik Nordmark 2028bd670b35SErik Nordmark ASSERT(ire->ire_type & IRE_LOCAL); 2029bd670b35SErik Nordmark ASSERT(ire->ire_ill != NULL); 2030bd670b35SErik Nordmark 2031bd670b35SErik Nordmark /* 2032bd670b35SErik Nordmark * Need to match on everything but local. 2033bd670b35SErik Nordmark * This might result in the creation of a IRE_IF_CLONE for the 2034bd670b35SErik Nordmark * same address as the IRE_LOCAL when restrict_interzone_loopback is 2035bd670b35SErik Nordmark * set. ire_add_*() ensures that the IRE_IF_CLONE are tail inserted 2036bd670b35SErik Nordmark * to make sure the IRE_LOCAL is always found first. 2037bd670b35SErik Nordmark */ 2038bd670b35SErik Nordmark ire_type = (IRE_ONLINK | IRE_OFFLINK) & ~(IRE_LOCAL|IRE_LOOPBACK); 2039bd670b35SErik Nordmark match_flags = MATCH_IRE_TYPE | MATCH_IRE_SECATTR; 2040bd670b35SErik Nordmark if (ill != NULL) 2041bd670b35SErik Nordmark match_flags |= MATCH_IRE_ILL; 2042bd670b35SErik Nordmark 2043bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) { 2044bd670b35SErik Nordmark alt_ire = ire_route_recursive_v4(ire->ire_addr, ire_type, 20459e3469d3SErik Nordmark ill, zoneid, tsl, match_flags, IRR_ALLOCATE, 0, ipst, NULL, 20469e3469d3SErik Nordmark NULL, &generation); 2047bd670b35SErik Nordmark } else { 2048bd670b35SErik Nordmark alt_ire = ire_route_recursive_v6(&ire->ire_addr_v6, ire_type, 20499e3469d3SErik Nordmark ill, zoneid, tsl, match_flags, IRR_ALLOCATE, 0, ipst, NULL, 20509e3469d3SErik Nordmark NULL, &generation); 2051bd670b35SErik Nordmark } 2052bd670b35SErik Nordmark ASSERT(alt_ire != NULL); 2053bd670b35SErik Nordmark 2054bd670b35SErik Nordmark if (alt_ire->ire_ill == ire->ire_ill) { 2055bd670b35SErik Nordmark /* Going out the same ILL - ok to send to IRE_LOCAL */ 2056bd670b35SErik Nordmark ire_refrele(alt_ire); 2057bd670b35SErik Nordmark } else { 2058bd670b35SErik Nordmark /* Different ill - ignore IRE_LOCAL */ 2059bd670b35SErik Nordmark ire_refrele(ire); 2060bd670b35SErik Nordmark ire = alt_ire; 2061bd670b35SErik Nordmark if (generationp != NULL) 2062bd670b35SErik Nordmark *generationp = generation; 2063bd670b35SErik Nordmark } 2064bd670b35SErik Nordmark return (ire); 2065bd670b35SErik Nordmark } 2066bd670b35SErik Nordmark 2067bd670b35SErik Nordmark boolean_t 2068bd670b35SErik Nordmark ire_find_zoneid(struct radix_node *rn, void *arg) 2069bd670b35SErik Nordmark { 2070bd670b35SErik Nordmark struct rt_entry *rt = (struct rt_entry *)rn; 2071bd670b35SErik Nordmark irb_t *irb; 2072bd670b35SErik Nordmark ire_t *ire; 2073bd670b35SErik Nordmark ire_ftable_args_t *margs = arg; 2074bd670b35SErik Nordmark 2075bd670b35SErik Nordmark ASSERT(rt != NULL); 2076bd670b35SErik Nordmark 2077bd670b35SErik Nordmark irb = &rt->rt_irb; 2078bd670b35SErik Nordmark 2079bd670b35SErik Nordmark if (irb->irb_ire_cnt == 0) 2080bd670b35SErik Nordmark return (B_FALSE); 2081bd670b35SErik Nordmark 2082bd670b35SErik Nordmark rw_enter(&irb->irb_lock, RW_READER); 2083bd670b35SErik Nordmark for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 2084bd670b35SErik Nordmark if (IRE_IS_CONDEMNED(ire)) 2085bd670b35SErik Nordmark continue; 2086bd670b35SErik Nordmark 2087188e1664SErik Nordmark if (!(ire->ire_type & IRE_INTERFACE)) 2088188e1664SErik Nordmark continue; 2089188e1664SErik Nordmark 2090bd670b35SErik Nordmark if (ire->ire_zoneid != ALL_ZONES && 2091bd670b35SErik Nordmark ire->ire_zoneid != margs->ift_zoneid) 2092bd670b35SErik Nordmark continue; 2093bd670b35SErik Nordmark 2094bd670b35SErik Nordmark if (margs->ift_ill != NULL && margs->ift_ill != ire->ire_ill) 2095bd670b35SErik Nordmark continue; 2096bd670b35SErik Nordmark 2097bd670b35SErik Nordmark if (is_system_labeled() && 2098bd670b35SErik Nordmark tsol_ire_match_gwattr(ire, margs->ift_tsl) != 0) 2099bd670b35SErik Nordmark continue; 2100bd670b35SErik Nordmark 2101bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 2102bd670b35SErik Nordmark return (B_TRUE); 2103bd670b35SErik Nordmark } 2104bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 2105bd670b35SErik Nordmark return (B_FALSE); 2106bd670b35SErik Nordmark } 2107bd670b35SErik Nordmark 2108bd670b35SErik Nordmark /* 2109bd670b35SErik Nordmark * Check if the zoneid (not ALL_ZONES) has an IRE_INTERFACE for the specified 2110bd670b35SErik Nordmark * gateway address. If ill is non-NULL we also match on it. 2111bd670b35SErik Nordmark * The caller must hold a read lock on RADIX_NODE_HEAD if lock_held is set. 21125597b60aSnordmark */ 21135597b60aSnordmark boolean_t 2114bd670b35SErik Nordmark ire_gateway_ok_zone_v4(ipaddr_t gateway, zoneid_t zoneid, ill_t *ill, 2115bd670b35SErik Nordmark const ts_label_t *tsl, ip_stack_t *ipst, boolean_t lock_held) 21165597b60aSnordmark { 2117bd670b35SErik Nordmark struct rt_sockaddr rdst; 2118bd670b35SErik Nordmark struct rt_entry *rt; 2119bd670b35SErik Nordmark ire_ftable_args_t margs; 2120e11c3f44Smeem 2121bd670b35SErik Nordmark ASSERT(ill == NULL || !ill->ill_isv6); 2122bd670b35SErik Nordmark if (lock_held) 2123bd670b35SErik Nordmark ASSERT(RW_READ_HELD(&ipst->ips_ip_ftable->rnh_lock)); 21247c478bd9Sstevel@tonic-gate else 2125bd670b35SErik Nordmark RADIX_NODE_HEAD_RLOCK(ipst->ips_ip_ftable); 2126bd670b35SErik Nordmark 2127188e1664SErik Nordmark bzero(&rdst, sizeof (rdst)); 2128bd670b35SErik Nordmark rdst.rt_sin_len = sizeof (rdst); 2129bd670b35SErik Nordmark rdst.rt_sin_family = AF_INET; 2130bd670b35SErik Nordmark rdst.rt_sin_addr.s_addr = gateway; 2131bd670b35SErik Nordmark 2132bd670b35SErik Nordmark /* 2133bd670b35SErik Nordmark * We only use margs for ill, zoneid, and tsl matching in 2134bd670b35SErik Nordmark * ire_find_zoneid 2135bd670b35SErik Nordmark */ 2136188e1664SErik Nordmark bzero(&margs, sizeof (margs)); 2137bd670b35SErik Nordmark margs.ift_ill = ill; 2138bd670b35SErik Nordmark margs.ift_zoneid = zoneid; 2139bd670b35SErik Nordmark margs.ift_tsl = tsl; 2140bd670b35SErik Nordmark rt = (struct rt_entry *)ipst->ips_ip_ftable->rnh_matchaddr_args(&rdst, 2141bd670b35SErik Nordmark ipst->ips_ip_ftable, ire_find_zoneid, (void *)&margs); 2142bd670b35SErik Nordmark 2143bd670b35SErik Nordmark if (!lock_held) 2144bd670b35SErik Nordmark RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 2145bd670b35SErik Nordmark 2146bd670b35SErik Nordmark return (rt != NULL); 21477c478bd9Sstevel@tonic-gate } 21487c478bd9Sstevel@tonic-gate 21497c478bd9Sstevel@tonic-gate /* 2150bd670b35SErik Nordmark * ire_walk routine to delete a fraction of redirect IREs and IRE_CLONE_IF IREs. 2151bd670b35SErik Nordmark * The fraction argument tells us what fraction of the IREs to delete. 2152bd670b35SErik Nordmark * Common for IPv4 and IPv6. 2153bd670b35SErik Nordmark * Used when memory backpressure. 21547c478bd9Sstevel@tonic-gate */ 2155bd670b35SErik Nordmark static void 2156bd670b35SErik Nordmark ire_delete_reclaim(ire_t *ire, char *arg) 21577c478bd9Sstevel@tonic-gate { 2158bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 2159bd670b35SErik Nordmark uint_t fraction = *(uint_t *)arg; 21607c478bd9Sstevel@tonic-gate uint_t rand; 21617c478bd9Sstevel@tonic-gate 2162bd670b35SErik Nordmark if ((ire->ire_flags & RTF_DYNAMIC) || 2163bd670b35SErik Nordmark (ire->ire_type & IRE_IF_CLONE)) { 21647c478bd9Sstevel@tonic-gate 2165bd670b35SErik Nordmark /* Pick a random number */ 2166d3d50737SRafael Vanoni rand = (uint_t)ddi_get_lbolt() + 2167bd670b35SErik Nordmark IRE_ADDR_HASH_V6(ire->ire_addr_v6, 256); 2168bd670b35SErik Nordmark 2169bd670b35SErik Nordmark /* Use truncation */ 2170bd670b35SErik Nordmark if ((rand/fraction)*fraction == rand) { 2171bd670b35SErik Nordmark IP_STAT(ipst, ip_ire_reclaim_deleted); 21727c478bd9Sstevel@tonic-gate ire_delete(ire); 21737c478bd9Sstevel@tonic-gate } 21747c478bd9Sstevel@tonic-gate } 2175bd670b35SErik Nordmark 21767c478bd9Sstevel@tonic-gate } 2177bd670b35SErik Nordmark 21787c478bd9Sstevel@tonic-gate /* 2179bd670b35SErik Nordmark * kmem_cache callback to free up memory. 2180bd670b35SErik Nordmark * 2181bd670b35SErik Nordmark * Free a fraction (ips_ip_ire_reclaim_fraction) of things IP added dynamically 2182bd670b35SErik Nordmark * (RTF_DYNAMIC and IRE_IF_CLONE). 21837c478bd9Sstevel@tonic-gate */ 2184bd670b35SErik Nordmark static void 2185bd670b35SErik Nordmark ip_ire_reclaim_stack(ip_stack_t *ipst) 2186bd670b35SErik Nordmark { 2187bd670b35SErik Nordmark uint_t fraction = ipst->ips_ip_ire_reclaim_fraction; 2188bd670b35SErik Nordmark 2189bd670b35SErik Nordmark IP_STAT(ipst, ip_ire_reclaim_calls); 2190bd670b35SErik Nordmark 2191bd670b35SErik Nordmark ire_walk(ire_delete_reclaim, &fraction, ipst); 2192bd670b35SErik Nordmark 2193bd670b35SErik Nordmark /* 2194bd670b35SErik Nordmark * Walk all CONNs that can have a reference on an ire, nce or dce. 2195bd670b35SErik Nordmark * Get them to update any stale references to drop any refholds they 2196bd670b35SErik Nordmark * have. 2197bd670b35SErik Nordmark */ 2198bd670b35SErik Nordmark ipcl_walk(conn_ixa_cleanup, (void *)B_FALSE, ipst); 2199bd670b35SErik Nordmark } 2200bd670b35SErik Nordmark 2201bd670b35SErik Nordmark /* 2202bd670b35SErik Nordmark * Called by the memory allocator subsystem directly, when the system 2203bd670b35SErik Nordmark * is running low on memory. 2204bd670b35SErik Nordmark */ 2205bd670b35SErik Nordmark /* ARGSUSED */ 2206bd670b35SErik Nordmark void 2207bd670b35SErik Nordmark ip_ire_reclaim(void *args) 2208bd670b35SErik Nordmark { 2209bd670b35SErik Nordmark netstack_handle_t nh; 2210bd670b35SErik Nordmark netstack_t *ns; 2211bd670b35SErik Nordmark 2212bd670b35SErik Nordmark netstack_next_init(&nh); 2213bd670b35SErik Nordmark while ((ns = netstack_next(&nh)) != NULL) { 2214bd670b35SErik Nordmark ip_ire_reclaim_stack(ns->netstack_ip); 2215bd670b35SErik Nordmark netstack_rele(ns); 2216bd670b35SErik Nordmark } 2217bd670b35SErik Nordmark netstack_next_fini(&nh); 22187c478bd9Sstevel@tonic-gate } 22197c478bd9Sstevel@tonic-gate 22207c478bd9Sstevel@tonic-gate static void 22217c478bd9Sstevel@tonic-gate power2_roundup(uint32_t *value) 22227c478bd9Sstevel@tonic-gate { 22237c478bd9Sstevel@tonic-gate int i; 22247c478bd9Sstevel@tonic-gate 22257c478bd9Sstevel@tonic-gate for (i = 1; i < 31; i++) { 22267c478bd9Sstevel@tonic-gate if (*value <= (1 << i)) 22277c478bd9Sstevel@tonic-gate break; 22287c478bd9Sstevel@tonic-gate } 22297c478bd9Sstevel@tonic-gate *value = (1 << i); 22307c478bd9Sstevel@tonic-gate } 22317c478bd9Sstevel@tonic-gate 2232f4b3ec61Sdh155122 /* Global init for all zones */ 22337c478bd9Sstevel@tonic-gate void 2234f4b3ec61Sdh155122 ip_ire_g_init() 22357c478bd9Sstevel@tonic-gate { 22367c478bd9Sstevel@tonic-gate /* 2237bd670b35SErik Nordmark * Create kmem_caches. ip_ire_reclaim() and ip_nce_reclaim() 2238bd670b35SErik Nordmark * will give disposable IREs back to system when needed. 22397c478bd9Sstevel@tonic-gate * This needs to be done here before anything else, since 22407c478bd9Sstevel@tonic-gate * ire_add() expects the cache to be created. 22417c478bd9Sstevel@tonic-gate */ 22427c478bd9Sstevel@tonic-gate ire_cache = kmem_cache_create("ire_cache", 2243bd670b35SErik Nordmark sizeof (ire_t), 0, NULL, NULL, 2244bd670b35SErik Nordmark ip_ire_reclaim, NULL, NULL, 0); 2245bd670b35SErik Nordmark 2246bd670b35SErik Nordmark ncec_cache = kmem_cache_create("ncec_cache", 2247bd670b35SErik Nordmark sizeof (ncec_t), 0, NULL, NULL, 2248bd670b35SErik Nordmark ip_nce_reclaim, NULL, NULL, 0); 2249bd670b35SErik Nordmark nce_cache = kmem_cache_create("nce_cache", 2250bd670b35SErik Nordmark sizeof (nce_t), 0, NULL, NULL, 2251bd670b35SErik Nordmark NULL, NULL, NULL, 0); 22527c478bd9Sstevel@tonic-gate 2253f4b3ec61Sdh155122 rt_entry_cache = kmem_cache_create("rt_entry", 2254f4b3ec61Sdh155122 sizeof (struct rt_entry), 0, NULL, NULL, NULL, NULL, NULL, 0); 2255f4b3ec61Sdh155122 2256f4b3ec61Sdh155122 /* 2257f4b3ec61Sdh155122 * Have radix code setup kmem caches etc. 2258f4b3ec61Sdh155122 */ 2259f4b3ec61Sdh155122 rn_init(); 2260f4b3ec61Sdh155122 } 2261f4b3ec61Sdh155122 2262f4b3ec61Sdh155122 void 2263f4b3ec61Sdh155122 ip_ire_init(ip_stack_t *ipst) 2264f4b3ec61Sdh155122 { 2265bd670b35SErik Nordmark ire_t *ire; 2266bd670b35SErik Nordmark int error; 2267f4b3ec61Sdh155122 2268f4b3ec61Sdh155122 mutex_init(&ipst->ips_ire_ft_init_lock, NULL, MUTEX_DEFAULT, 0); 2269f4b3ec61Sdh155122 2270f4b3ec61Sdh155122 (void) rn_inithead((void **)&ipst->ips_ip_ftable, 32); 2271f4b3ec61Sdh155122 22727c478bd9Sstevel@tonic-gate /* 22737c478bd9Sstevel@tonic-gate * Make sure that the forwarding table size is a power of 2. 22747c478bd9Sstevel@tonic-gate * The IRE*_ADDR_HASH() macroes depend on that. 22757c478bd9Sstevel@tonic-gate */ 2276f4b3ec61Sdh155122 ipst->ips_ip6_ftable_hash_size = ip6_ftable_hash_size; 2277f4b3ec61Sdh155122 power2_roundup(&ipst->ips_ip6_ftable_hash_size); 2278f4b3ec61Sdh155122 2279bd670b35SErik Nordmark /* 2280bd670b35SErik Nordmark * Allocate/initialize a pair of IRE_NOROUTEs for each of IPv4 and IPv6. 2281bd670b35SErik Nordmark * The ire_reject_v* has RTF_REJECT set, and the ire_blackhole_v* has 2282bd670b35SErik Nordmark * RTF_BLACKHOLE set. We use the latter for transient errors such 2283bd670b35SErik Nordmark * as memory allocation failures and tripping on IRE_IS_CONDEMNED 2284bd670b35SErik Nordmark * entries. 2285bd670b35SErik Nordmark */ 2286bd670b35SErik Nordmark ire = kmem_cache_alloc(ire_cache, KM_SLEEP); 2287bd670b35SErik Nordmark *ire = ire_null; 2288bd670b35SErik Nordmark error = ire_init_v4(ire, 0, 0, 0, IRE_NOROUTE, NULL, ALL_ZONES, 2289bd670b35SErik Nordmark RTF_REJECT|RTF_UP, NULL, ipst); 2290bd670b35SErik Nordmark ASSERT(error == 0); 2291bd670b35SErik Nordmark ipst->ips_ire_reject_v4 = ire; 2292bd670b35SErik Nordmark 2293bd670b35SErik Nordmark ire = kmem_cache_alloc(ire_cache, KM_SLEEP); 2294bd670b35SErik Nordmark *ire = ire_null; 2295bd670b35SErik Nordmark error = ire_init_v6(ire, 0, 0, 0, IRE_NOROUTE, NULL, ALL_ZONES, 2296bd670b35SErik Nordmark RTF_REJECT|RTF_UP, NULL, ipst); 2297bd670b35SErik Nordmark ASSERT(error == 0); 2298bd670b35SErik Nordmark ipst->ips_ire_reject_v6 = ire; 2299bd670b35SErik Nordmark 2300bd670b35SErik Nordmark ire = kmem_cache_alloc(ire_cache, KM_SLEEP); 2301bd670b35SErik Nordmark *ire = ire_null; 2302bd670b35SErik Nordmark error = ire_init_v4(ire, 0, 0, 0, IRE_NOROUTE, NULL, ALL_ZONES, 2303bd670b35SErik Nordmark RTF_BLACKHOLE|RTF_UP, NULL, ipst); 2304bd670b35SErik Nordmark ASSERT(error == 0); 2305bd670b35SErik Nordmark ipst->ips_ire_blackhole_v4 = ire; 2306bd670b35SErik Nordmark 2307bd670b35SErik Nordmark ire = kmem_cache_alloc(ire_cache, KM_SLEEP); 2308bd670b35SErik Nordmark *ire = ire_null; 2309bd670b35SErik Nordmark error = ire_init_v6(ire, 0, 0, 0, IRE_NOROUTE, NULL, ALL_ZONES, 2310bd670b35SErik Nordmark RTF_BLACKHOLE|RTF_UP, NULL, ipst); 2311bd670b35SErik Nordmark ASSERT(error == 0); 2312bd670b35SErik Nordmark ipst->ips_ire_blackhole_v6 = ire; 2313bd670b35SErik Nordmark 2314bd670b35SErik Nordmark rw_init(&ipst->ips_ip6_ire_head_lock, NULL, RW_DEFAULT, NULL); 2315bd670b35SErik Nordmark rw_init(&ipst->ips_ire_dep_lock, NULL, RW_DEFAULT, NULL); 23167c478bd9Sstevel@tonic-gate } 23177c478bd9Sstevel@tonic-gate 23187c478bd9Sstevel@tonic-gate void 2319f4b3ec61Sdh155122 ip_ire_g_fini(void) 2320f4b3ec61Sdh155122 { 2321f4b3ec61Sdh155122 kmem_cache_destroy(ire_cache); 2322bd670b35SErik Nordmark kmem_cache_destroy(ncec_cache); 2323bd670b35SErik Nordmark kmem_cache_destroy(nce_cache); 2324f4b3ec61Sdh155122 kmem_cache_destroy(rt_entry_cache); 2325f4b3ec61Sdh155122 2326f4b3ec61Sdh155122 rn_fini(); 2327f4b3ec61Sdh155122 } 2328f4b3ec61Sdh155122 2329f4b3ec61Sdh155122 void 2330f4b3ec61Sdh155122 ip_ire_fini(ip_stack_t *ipst) 23317c478bd9Sstevel@tonic-gate { 23327c478bd9Sstevel@tonic-gate int i; 23337c478bd9Sstevel@tonic-gate 2334bd670b35SErik Nordmark rw_destroy(&ipst->ips_ire_dep_lock); 2335bd670b35SErik Nordmark rw_destroy(&ipst->ips_ip6_ire_head_lock); 2336bd670b35SErik Nordmark 2337*b8d97ac6SThirumalai Srinivasan ire_make_condemned(ipst->ips_ire_reject_v6); 2338bd670b35SErik Nordmark ire_refrele_notr(ipst->ips_ire_reject_v6); 2339bd670b35SErik Nordmark ipst->ips_ire_reject_v6 = NULL; 2340*b8d97ac6SThirumalai Srinivasan 2341*b8d97ac6SThirumalai Srinivasan ire_make_condemned(ipst->ips_ire_reject_v4); 2342bd670b35SErik Nordmark ire_refrele_notr(ipst->ips_ire_reject_v4); 2343bd670b35SErik Nordmark ipst->ips_ire_reject_v4 = NULL; 2344*b8d97ac6SThirumalai Srinivasan 2345*b8d97ac6SThirumalai Srinivasan ire_make_condemned(ipst->ips_ire_blackhole_v6); 2346bd670b35SErik Nordmark ire_refrele_notr(ipst->ips_ire_blackhole_v6); 2347bd670b35SErik Nordmark ipst->ips_ire_blackhole_v6 = NULL; 2348*b8d97ac6SThirumalai Srinivasan 2349*b8d97ac6SThirumalai Srinivasan ire_make_condemned(ipst->ips_ire_blackhole_v4); 2350bd670b35SErik Nordmark ire_refrele_notr(ipst->ips_ire_blackhole_v4); 2351bd670b35SErik Nordmark ipst->ips_ire_blackhole_v4 = NULL; 2352bd670b35SErik Nordmark 2353f4b3ec61Sdh155122 /* 2354f4b3ec61Sdh155122 * Delete all IREs - assumes that the ill/ipifs have 2355bd670b35SErik Nordmark * been removed so what remains are just the ftable to handle. 2356f4b3ec61Sdh155122 */ 2357f4b3ec61Sdh155122 ire_walk(ire_delete, NULL, ipst); 2358c793af95Ssangeeta 2359f4b3ec61Sdh155122 rn_freehead(ipst->ips_ip_ftable); 2360f4b3ec61Sdh155122 ipst->ips_ip_ftable = NULL; 23617c478bd9Sstevel@tonic-gate 2362f4b3ec61Sdh155122 mutex_destroy(&ipst->ips_ire_ft_init_lock); 23637c478bd9Sstevel@tonic-gate 2364f4b3ec61Sdh155122 for (i = 0; i < IP6_MASK_TABLE_SIZE; i++) { 2365f4b3ec61Sdh155122 irb_t *ptr; 2366f4b3ec61Sdh155122 int j; 2367f4b3ec61Sdh155122 2368f4b3ec61Sdh155122 if ((ptr = ipst->ips_ip_forwarding_table_v6[i]) == NULL) 2369f4b3ec61Sdh155122 continue; 2370f4b3ec61Sdh155122 2371f4b3ec61Sdh155122 for (j = 0; j < ipst->ips_ip6_ftable_hash_size; j++) { 2372f4b3ec61Sdh155122 ASSERT(ptr[j].irb_ire == NULL); 2373f4b3ec61Sdh155122 rw_destroy(&ptr[j].irb_lock); 2374f4b3ec61Sdh155122 } 2375f4b3ec61Sdh155122 mi_free(ptr); 2376f4b3ec61Sdh155122 ipst->ips_ip_forwarding_table_v6[i] = NULL; 2377f4b3ec61Sdh155122 } 23787c478bd9Sstevel@tonic-gate } 23797c478bd9Sstevel@tonic-gate 23806a8288c7Scarlsonj #ifdef DEBUG 23817c478bd9Sstevel@tonic-gate void 23827c478bd9Sstevel@tonic-gate ire_trace_ref(ire_t *ire) 23837c478bd9Sstevel@tonic-gate { 23847c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 23856a8288c7Scarlsonj if (ire->ire_trace_disable) { 23867c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 23877c478bd9Sstevel@tonic-gate return; 23887c478bd9Sstevel@tonic-gate } 23896a8288c7Scarlsonj 23906a8288c7Scarlsonj if (th_trace_ref(ire, ire->ire_ipst)) { 23916a8288c7Scarlsonj mutex_exit(&ire->ire_lock); 23926a8288c7Scarlsonj } else { 23937c478bd9Sstevel@tonic-gate ire->ire_trace_disable = B_TRUE; 23947c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 23956a8288c7Scarlsonj ire_trace_cleanup(ire); 23967c478bd9Sstevel@tonic-gate } 23977c478bd9Sstevel@tonic-gate } 23987c478bd9Sstevel@tonic-gate 23997c478bd9Sstevel@tonic-gate void 24007c478bd9Sstevel@tonic-gate ire_untrace_ref(ire_t *ire) 24017c478bd9Sstevel@tonic-gate { 24027c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 24036a8288c7Scarlsonj if (!ire->ire_trace_disable) 24046a8288c7Scarlsonj th_trace_unref(ire); 24057c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 24067c478bd9Sstevel@tonic-gate } 24077c478bd9Sstevel@tonic-gate 24087c478bd9Sstevel@tonic-gate static void 24096a8288c7Scarlsonj ire_trace_cleanup(const ire_t *ire) 24107c478bd9Sstevel@tonic-gate { 24116a8288c7Scarlsonj th_trace_cleanup(ire, ire->ire_trace_disable); 24127c478bd9Sstevel@tonic-gate } 24136a8288c7Scarlsonj #endif /* DEBUG */ 2414c793af95Ssangeeta 2415c793af95Ssangeeta /* 2416bd670b35SErik Nordmark * Find, or create if needed, the nce_t pointer to the neighbor cache 2417bd670b35SErik Nordmark * entry ncec_t for an IPv4 address. The nce_t will be created on the ill_t 2418bd670b35SErik Nordmark * in the non-IPMP case, or on the cast-ill in the IPMP bcast/mcast case, or 2419bd670b35SErik Nordmark * on the next available under-ill (selected by the IPMP rotor) in the 2420bd670b35SErik Nordmark * unicast IPMP case. 242154da8755Ssowmini * 242254da8755Ssowmini * If a neighbor-cache entry has to be created (i.e., one does not already 2423bd670b35SErik Nordmark * exist in the nce list) the ncec_lladdr and ncec_state of the neighbor cache 2424bd670b35SErik Nordmark * entry are initialized in nce_add_v4(). The broadcast, multicast, and 2425bd670b35SErik Nordmark * link-layer type determine the contents of {ncec_state, ncec_lladdr} of 2426bd670b35SErik Nordmark * the ncec_t created. The ncec_lladdr is non-null for all link types with 2427bd670b35SErik Nordmark * non-zero ill_phys_addr_length, though the contents may be zero in cases 2428bd670b35SErik Nordmark * where the link-layer type is not known at the time of creation 2429bd670b35SErik Nordmark * (e.g., IRE_IFRESOLVER links) 2430bd670b35SErik Nordmark * 2431bd670b35SErik Nordmark * All IRE_BROADCAST entries have ncec_state = ND_REACHABLE, and the nce_lladr 2432bd670b35SErik Nordmark * has the physical broadcast address of the outgoing interface. 2433bd670b35SErik Nordmark * For unicast ire entries, 243454da8755Ssowmini * - if the outgoing interface is of type IRE_IF_RESOLVER, a newly created 2435bd670b35SErik Nordmark * ncec_t with 0 nce_lladr contents, and will be in the ND_INITIAL state. 243654da8755Ssowmini * - if the outgoing interface is a IRE_IF_NORESOLVER interface, no link 2437bd670b35SErik Nordmark * layer resolution is necessary, so that the ncec_t will be in the 2438bd670b35SErik Nordmark * ND_REACHABLE state 243954da8755Ssowmini * 244054da8755Ssowmini * The link layer information needed for broadcast addresses, and for 244154da8755Ssowmini * packets sent on IRE_IF_NORESOLVER interfaces is a constant mapping that 2442bd670b35SErik Nordmark * never needs re-verification for the lifetime of the ncec_t. These are 2443bd670b35SErik Nordmark * therefore marked NCE_F_NONUD. 244454da8755Ssowmini * 2445bd670b35SErik Nordmark * The nce returned will be created such that the nce_ill == ill that 2446bd670b35SErik Nordmark * is passed in. Note that the nce itself may not have ncec_ill == ill 2447bd670b35SErik Nordmark * where IPMP links are involved. 2448c793af95Ssangeeta */ 2449bd670b35SErik Nordmark static nce_t * 2450bd670b35SErik Nordmark ire_nce_init(ill_t *ill, const void *addr, int ire_type) 2451c793af95Ssangeeta { 2452c793af95Ssangeeta int err; 245354da8755Ssowmini nce_t *nce = NULL; 2454bd670b35SErik Nordmark uint16_t ncec_flags; 2455bd670b35SErik Nordmark uchar_t *hwaddr; 2456bd670b35SErik Nordmark boolean_t need_refrele = B_FALSE; 2457bd670b35SErik Nordmark ill_t *in_ill = ill; 2458bd670b35SErik Nordmark boolean_t is_unicast; 2459bd670b35SErik Nordmark uint_t hwaddr_len; 2460c793af95Ssangeeta 2461bd670b35SErik Nordmark is_unicast = ((ire_type & (IRE_MULTICAST|IRE_BROADCAST)) == 0); 2462bd670b35SErik Nordmark if (IS_IPMP(ill) || 2463bd670b35SErik Nordmark ((ire_type & IRE_BROADCAST) && IS_UNDER_IPMP(ill))) { 2464bd670b35SErik Nordmark if ((ill = ipmp_ill_get_xmit_ill(ill, is_unicast)) == NULL) 2465bd670b35SErik Nordmark return (NULL); 2466bd670b35SErik Nordmark need_refrele = B_TRUE; 2467bd670b35SErik Nordmark } 2468bd670b35SErik Nordmark ncec_flags = (ill->ill_flags & ILLF_NONUD) ? NCE_F_NONUD : 0; 2469c793af95Ssangeeta 2470bd670b35SErik Nordmark switch (ire_type) { 2471c793af95Ssangeeta case IRE_BROADCAST: 2472bd670b35SErik Nordmark ASSERT(!ill->ill_isv6); 2473bd670b35SErik Nordmark ncec_flags |= (NCE_F_BCAST|NCE_F_NONUD); 2474c793af95Ssangeeta break; 2475bd670b35SErik Nordmark case IRE_MULTICAST: 2476bd670b35SErik Nordmark ncec_flags |= (NCE_F_MCAST|NCE_F_NONUD); 2477bd670b35SErik Nordmark break; 2478c793af95Ssangeeta } 2479c793af95Ssangeeta 2480bd670b35SErik Nordmark if (ill->ill_net_type == IRE_IF_NORESOLVER && is_unicast) { 2481bd670b35SErik Nordmark hwaddr = ill->ill_dest_addr; 2482bd670b35SErik Nordmark } else { 2483bd670b35SErik Nordmark hwaddr = NULL; 2484b9c344b3Ssowmini } 2485bd670b35SErik Nordmark hwaddr_len = ill->ill_phys_addr_length; 2486b9c344b3Ssowmini 2487bd670b35SErik Nordmark retry: 2488bd670b35SErik Nordmark /* nce_state will be computed by nce_add_common() */ 2489bd670b35SErik Nordmark if (!ill->ill_isv6) { 2490bd670b35SErik Nordmark err = nce_lookup_then_add_v4(ill, hwaddr, hwaddr_len, addr, 2491bd670b35SErik Nordmark ncec_flags, ND_UNCHANGED, &nce); 2492bd670b35SErik Nordmark } else { 2493bd670b35SErik Nordmark err = nce_lookup_then_add_v6(ill, hwaddr, hwaddr_len, addr, 2494bd670b35SErik Nordmark ncec_flags, ND_UNCHANGED, &nce); 2495bd670b35SErik Nordmark } 2496c793af95Ssangeeta 2497c793af95Ssangeeta switch (err) { 2498c793af95Ssangeeta case 0: 2499bd670b35SErik Nordmark break; 2500c793af95Ssangeeta case EEXIST: 2501c793af95Ssangeeta /* 2502bd670b35SErik Nordmark * When subnets change or partially overlap what was once 2503bd670b35SErik Nordmark * a broadcast address could now be a unicast, or vice versa. 2504c793af95Ssangeeta */ 2505bd670b35SErik Nordmark if (((ncec_flags ^ nce->nce_common->ncec_flags) & 2506bd670b35SErik Nordmark NCE_F_BCAST) != 0) { 2507bd670b35SErik Nordmark ASSERT(!ill->ill_isv6); 2508bd670b35SErik Nordmark ncec_delete(nce->nce_common); 2509bd670b35SErik Nordmark nce_refrele(nce); 2510bd670b35SErik Nordmark goto retry; 2511bd670b35SErik Nordmark } 2512c793af95Ssangeeta break; 2513c793af95Ssangeeta default: 2514bd670b35SErik Nordmark DTRACE_PROBE2(nce__init__fail, ill_t *, ill, int, err); 2515bd670b35SErik Nordmark if (need_refrele) 2516bd670b35SErik Nordmark ill_refrele(ill); 2517bd670b35SErik Nordmark return (NULL); 2518c793af95Ssangeeta } 25199294ad19SSowmini Varadhan /* 2520bd670b35SErik Nordmark * If the ill was an under-ill of an IPMP group, we need to verify 2521bd670b35SErik Nordmark * that it is still active so that we select an active interface in 2522bd670b35SErik Nordmark * the group. However, since ipmp_ill_is_active ASSERTs for 2523bd670b35SErik Nordmark * IS_UNDER_IPMP(), we first need to verify that the ill is an 2524bd670b35SErik Nordmark * under-ill, and since this is being done in the data path, the 2525bd670b35SErik Nordmark * only way to ascertain this is by holding the ill_g_lock. 25269294ad19SSowmini Varadhan */ 2527bd670b35SErik Nordmark rw_enter(&ill->ill_ipst->ips_ill_g_lock, RW_READER); 2528bd670b35SErik Nordmark mutex_enter(&ill->ill_lock); 2529bd670b35SErik Nordmark mutex_enter(&ill->ill_phyint->phyint_lock); 2530bd670b35SErik Nordmark if (need_refrele && IS_UNDER_IPMP(ill) && !ipmp_ill_is_active(ill)) { 2531c793af95Ssangeeta /* 2532bd670b35SErik Nordmark * need_refrele implies that the under ill was selected by 2533bd670b35SErik Nordmark * ipmp_ill_get_xmit_ill() because either the in_ill was an 2534bd670b35SErik Nordmark * ipmp_ill, or we are sending a non-unicast packet on 2535bd670b35SErik Nordmark * an under_ill. However, when we get here, the ill selected by 2536bd670b35SErik Nordmark * ipmp_ill_get_xmit_ill was pulled out of the active set 2537bd670b35SErik Nordmark * (for unicast) or cast_ill nomination (for 2538bd670b35SErik Nordmark * !unicast) after it was picked as the outgoing ill. 2539bd670b35SErik Nordmark * We have to pick an active interface and/or cast_ill in the 2540bd670b35SErik Nordmark * group. 2541c793af95Ssangeeta */ 2542bd670b35SErik Nordmark mutex_exit(&ill->ill_phyint->phyint_lock); 2543bd670b35SErik Nordmark nce_delete(nce); 2544bd670b35SErik Nordmark mutex_exit(&ill->ill_lock); 2545bd670b35SErik Nordmark rw_exit(&ill->ill_ipst->ips_ill_g_lock); 2546bd670b35SErik Nordmark nce_refrele(nce); 2547bd670b35SErik Nordmark ill_refrele(ill); 2548bd670b35SErik Nordmark if ((ill = ipmp_ill_get_xmit_ill(in_ill, is_unicast)) == NULL) 2549bd670b35SErik Nordmark return (NULL); 2550bd670b35SErik Nordmark goto retry; 2551c793af95Ssangeeta } else { 2552bd670b35SErik Nordmark mutex_exit(&ill->ill_phyint->phyint_lock); 2553bd670b35SErik Nordmark mutex_exit(&ill->ill_lock); 2554bd670b35SErik Nordmark rw_exit(&ill->ill_ipst->ips_ill_g_lock); 2555bd670b35SErik Nordmark } 2556bd670b35SErik Nordmark done: 2557bd670b35SErik Nordmark ASSERT(nce->nce_ill == ill); 2558bd670b35SErik Nordmark if (need_refrele) 2559bd670b35SErik Nordmark ill_refrele(ill); 2560bd670b35SErik Nordmark return (nce); 2561bd670b35SErik Nordmark } 2562bd670b35SErik Nordmark 2563bd670b35SErik Nordmark nce_t * 2564bd670b35SErik Nordmark arp_nce_init(ill_t *ill, in_addr_t addr4, int ire_type) 2565bd670b35SErik Nordmark { 2566bd670b35SErik Nordmark return (ire_nce_init(ill, &addr4, ire_type)); 2567bd670b35SErik Nordmark } 2568bd670b35SErik Nordmark 2569bd670b35SErik Nordmark nce_t * 2570bd670b35SErik Nordmark ndp_nce_init(ill_t *ill, const in6_addr_t *addr6, int ire_type) 2571bd670b35SErik Nordmark { 2572bd670b35SErik Nordmark ASSERT((ire_type & IRE_BROADCAST) == 0); 2573bd670b35SErik Nordmark return (ire_nce_init(ill, addr6, ire_type)); 2574bd670b35SErik Nordmark } 2575bd670b35SErik Nordmark 2576bd670b35SErik Nordmark /* 2577bd670b35SErik Nordmark * The caller should hold irb_lock as a writer if the ire is in a bucket. 2578f1c454b4SSowmini Varadhan * This routine will clear ire_nce_cache, and we make sure that we can never 2579f1c454b4SSowmini Varadhan * set ire_nce_cache after the ire is marked condemned. 2580bd670b35SErik Nordmark */ 2581bd670b35SErik Nordmark void 2582bd670b35SErik Nordmark ire_make_condemned(ire_t *ire) 2583bd670b35SErik Nordmark { 2584bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 2585f1c454b4SSowmini Varadhan nce_t *nce; 2586bd670b35SErik Nordmark 2587bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 2588bd670b35SErik Nordmark ASSERT(ire->ire_bucket == NULL || 2589bd670b35SErik Nordmark RW_WRITE_HELD(&ire->ire_bucket->irb_lock)); 2590bd670b35SErik Nordmark ASSERT(!IRE_IS_CONDEMNED(ire)); 2591bd670b35SErik Nordmark ire->ire_generation = IRE_GENERATION_CONDEMNED; 2592bd670b35SErik Nordmark /* Count how many condemned ires for kmem_cache callback */ 2593bd670b35SErik Nordmark atomic_add_32(&ipst->ips_num_ire_condemned, 1); 2594f1c454b4SSowmini Varadhan nce = ire->ire_nce_cache; 2595f1c454b4SSowmini Varadhan ire->ire_nce_cache = NULL; 2596bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 2597f1c454b4SSowmini Varadhan if (nce != NULL) 2598f1c454b4SSowmini Varadhan nce_refrele(nce); 2599bd670b35SErik Nordmark } 2600bd670b35SErik Nordmark 2601bd670b35SErik Nordmark /* 2602bd670b35SErik Nordmark * Increment the generation avoiding the special condemned value 2603bd670b35SErik Nordmark */ 2604bd670b35SErik Nordmark void 2605bd670b35SErik Nordmark ire_increment_generation(ire_t *ire) 2606bd670b35SErik Nordmark { 2607bd670b35SErik Nordmark uint_t generation; 2608bd670b35SErik Nordmark 2609bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 2610bd670b35SErik Nordmark /* 2611bd670b35SErik Nordmark * Even though the caller has a hold it can't prevent a concurrent 2612bd670b35SErik Nordmark * ire_delete marking the IRE condemned 2613bd670b35SErik Nordmark */ 2614bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(ire)) { 2615bd670b35SErik Nordmark generation = ire->ire_generation + 1; 2616bd670b35SErik Nordmark if (generation == IRE_GENERATION_CONDEMNED) 2617bd670b35SErik Nordmark generation = IRE_GENERATION_INITIAL; 2618bd670b35SErik Nordmark ASSERT(generation != IRE_GENERATION_VERIFY); 2619bd670b35SErik Nordmark ire->ire_generation = generation; 2620bd670b35SErik Nordmark } 2621bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 2622bd670b35SErik Nordmark } 2623bd670b35SErik Nordmark 2624bd670b35SErik Nordmark /* 2625bd670b35SErik Nordmark * Increment ire_generation on all the IRE_MULTICASTs 2626bd670b35SErik Nordmark * Used when the default multicast interface (as determined by 2627bd670b35SErik Nordmark * ill_lookup_multicast) might have changed. 2628bd670b35SErik Nordmark * 2629bd670b35SErik Nordmark * That includes the zoneid, IFF_ flags, the IPv6 scope of the address, and 2630bd670b35SErik Nordmark * ill unplumb. 2631bd670b35SErik Nordmark */ 2632bd670b35SErik Nordmark void 2633bd670b35SErik Nordmark ire_increment_multicast_generation(ip_stack_t *ipst, boolean_t isv6) 2634bd670b35SErik Nordmark { 2635bd670b35SErik Nordmark ill_t *ill; 2636bd670b35SErik Nordmark ill_walk_context_t ctx; 2637bd670b35SErik Nordmark 2638bd670b35SErik Nordmark rw_enter(&ipst->ips_ill_g_lock, RW_READER); 2639bd670b35SErik Nordmark if (isv6) 2640bd670b35SErik Nordmark ill = ILL_START_WALK_V6(&ctx, ipst); 2641bd670b35SErik Nordmark else 2642bd670b35SErik Nordmark ill = ILL_START_WALK_V4(&ctx, ipst); 2643bd670b35SErik Nordmark for (; ill != NULL; ill = ill_next(&ctx, ill)) { 2644bd670b35SErik Nordmark if (ILL_IS_CONDEMNED(ill)) 2645bd670b35SErik Nordmark continue; 2646bd670b35SErik Nordmark if (ill->ill_ire_multicast != NULL) 2647bd670b35SErik Nordmark ire_increment_generation(ill->ill_ire_multicast); 2648bd670b35SErik Nordmark } 2649bd670b35SErik Nordmark rw_exit(&ipst->ips_ill_g_lock); 2650bd670b35SErik Nordmark } 2651bd670b35SErik Nordmark 2652bd670b35SErik Nordmark /* 2653bd670b35SErik Nordmark * Return a held IRE_NOROUTE with RTF_REJECT set 2654bd670b35SErik Nordmark */ 2655bd670b35SErik Nordmark ire_t * 2656bd670b35SErik Nordmark ire_reject(ip_stack_t *ipst, boolean_t isv6) 2657bd670b35SErik Nordmark { 2658bd670b35SErik Nordmark ire_t *ire; 2659bd670b35SErik Nordmark 2660bd670b35SErik Nordmark if (isv6) 2661bd670b35SErik Nordmark ire = ipst->ips_ire_reject_v6; 2662bd670b35SErik Nordmark else 2663bd670b35SErik Nordmark ire = ipst->ips_ire_reject_v4; 2664bd670b35SErik Nordmark 2665bd670b35SErik Nordmark ASSERT(ire->ire_generation != IRE_GENERATION_CONDEMNED); 2666bd670b35SErik Nordmark ire_refhold(ire); 2667bd670b35SErik Nordmark return (ire); 2668bd670b35SErik Nordmark } 2669bd670b35SErik Nordmark 2670bd670b35SErik Nordmark /* 2671bd670b35SErik Nordmark * Return a held IRE_NOROUTE with RTF_BLACKHOLE set 2672bd670b35SErik Nordmark */ 2673bd670b35SErik Nordmark ire_t * 2674bd670b35SErik Nordmark ire_blackhole(ip_stack_t *ipst, boolean_t isv6) 2675bd670b35SErik Nordmark { 2676bd670b35SErik Nordmark ire_t *ire; 2677bd670b35SErik Nordmark 2678bd670b35SErik Nordmark if (isv6) 2679bd670b35SErik Nordmark ire = ipst->ips_ire_blackhole_v6; 2680bd670b35SErik Nordmark else 2681bd670b35SErik Nordmark ire = ipst->ips_ire_blackhole_v4; 2682bd670b35SErik Nordmark 2683bd670b35SErik Nordmark ASSERT(ire->ire_generation != IRE_GENERATION_CONDEMNED); 2684bd670b35SErik Nordmark ire_refhold(ire); 2685bd670b35SErik Nordmark return (ire); 2686bd670b35SErik Nordmark } 2687bd670b35SErik Nordmark 2688bd670b35SErik Nordmark /* 2689bd670b35SErik Nordmark * Return a held IRE_MULTICAST. 2690bd670b35SErik Nordmark */ 2691bd670b35SErik Nordmark ire_t * 2692bd670b35SErik Nordmark ire_multicast(ill_t *ill) 2693bd670b35SErik Nordmark { 2694bd670b35SErik Nordmark ire_t *ire = ill->ill_ire_multicast; 2695bd670b35SErik Nordmark 2696bd670b35SErik Nordmark ASSERT(ire == NULL || ire->ire_generation != IRE_GENERATION_CONDEMNED); 2697bd670b35SErik Nordmark if (ire == NULL) 2698bd670b35SErik Nordmark ire = ire_blackhole(ill->ill_ipst, ill->ill_isv6); 2699bd670b35SErik Nordmark else 2700bd670b35SErik Nordmark ire_refhold(ire); 2701bd670b35SErik Nordmark return (ire); 2702bd670b35SErik Nordmark } 2703bd670b35SErik Nordmark 2704bd670b35SErik Nordmark /* 2705bd670b35SErik Nordmark * Given an IRE return its nexthop IRE. The nexthop IRE is an IRE_ONLINK 2706bd670b35SErik Nordmark * that is an exact match (i.e., a /32 for IPv4 and /128 for IPv6). 2707bd670b35SErik Nordmark * This can return an RTF_REJECT|RTF_BLACKHOLE. 2708bd670b35SErik Nordmark * The returned IRE is held. 2709bd670b35SErik Nordmark * The assumption is that ip_select_route() has been called and returned the 2710bd670b35SErik Nordmark * IRE (thus ip_select_route would have set up the ire_dep* information.) 2711bd670b35SErik Nordmark * If some IRE is deleteted then ire_dep_remove() will have been called and 2712bd670b35SErik Nordmark * we might not find a nexthop IRE, in which case we return NULL. 2713bd670b35SErik Nordmark */ 2714bd670b35SErik Nordmark ire_t * 2715bd670b35SErik Nordmark ire_nexthop(ire_t *ire) 2716bd670b35SErik Nordmark { 2717bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 2718bd670b35SErik Nordmark 2719bd670b35SErik Nordmark /* Acquire lock to walk ire_dep_parent */ 2720bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 2721bd670b35SErik Nordmark while (ire != NULL) { 2722bd670b35SErik Nordmark if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) { 2723bd670b35SErik Nordmark goto done; 27249294ad19SSowmini Varadhan } 2725c793af95Ssangeeta /* 2726bd670b35SErik Nordmark * If we find an IRE_ONLINK we are done. This includes 2727bd670b35SErik Nordmark * the case of IRE_MULTICAST. 2728bd670b35SErik Nordmark * Note that in order to send packets we need a host-specific 2729bd670b35SErik Nordmark * IRE_IF_ALL first in the ire_dep_parent chain. Normally this 2730bd670b35SErik Nordmark * is done by inserting an IRE_IF_CLONE if the IRE_INTERFACE 2731bd670b35SErik Nordmark * was not host specific. 2732bd670b35SErik Nordmark * However, ip_rts_request doesn't want to send packets 2733bd670b35SErik Nordmark * hence doesn't want to allocate an IRE_IF_CLONE. Yet 2734bd670b35SErik Nordmark * it needs an IRE_IF_ALL to get to the ill. Thus 2735bd670b35SErik Nordmark * we return IRE_IF_ALL that are not host specific here. 2736c793af95Ssangeeta */ 2737bd670b35SErik Nordmark if (ire->ire_type & IRE_ONLINK) 2738bd670b35SErik Nordmark goto done; 2739bd670b35SErik Nordmark ire = ire->ire_dep_parent; 2740c793af95Ssangeeta } 2741bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 2742bd670b35SErik Nordmark return (NULL); 2743bd670b35SErik Nordmark 2744bd670b35SErik Nordmark done: 2745bd670b35SErik Nordmark ire_refhold(ire); 2746bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 2747bd670b35SErik Nordmark return (ire); 2748bd670b35SErik Nordmark } 2749bd670b35SErik Nordmark 2750bd670b35SErik Nordmark /* 2751bd670b35SErik Nordmark * Find the ill used to send packets. This will be NULL in case 2752bd670b35SErik Nordmark * of a reject or blackhole. 2753bd670b35SErik Nordmark * The returned ill is held; caller needs to do ill_refrele when done. 2754bd670b35SErik Nordmark */ 2755bd670b35SErik Nordmark ill_t * 2756bd670b35SErik Nordmark ire_nexthop_ill(ire_t *ire) 2757bd670b35SErik Nordmark { 2758bd670b35SErik Nordmark ill_t *ill; 2759bd670b35SErik Nordmark 2760bd670b35SErik Nordmark ire = ire_nexthop(ire); 2761bd670b35SErik Nordmark if (ire == NULL) 2762bd670b35SErik Nordmark return (NULL); 2763bd670b35SErik Nordmark 2764bd670b35SErik Nordmark /* ire_ill can not change for an existing ire */ 2765bd670b35SErik Nordmark ill = ire->ire_ill; 2766bd670b35SErik Nordmark if (ill != NULL) 2767bd670b35SErik Nordmark ill_refhold(ill); 2768bd670b35SErik Nordmark ire_refrele(ire); 2769bd670b35SErik Nordmark return (ill); 2770bd670b35SErik Nordmark } 2771bd670b35SErik Nordmark 2772bd670b35SErik Nordmark #ifdef DEBUG 2773bd670b35SErik Nordmark static boolean_t 2774bd670b35SErik Nordmark parent_has_child(ire_t *parent, ire_t *child) 2775bd670b35SErik Nordmark { 2776bd670b35SErik Nordmark ire_t *ire; 2777bd670b35SErik Nordmark ire_t *prev; 2778bd670b35SErik Nordmark 2779bd670b35SErik Nordmark ire = parent->ire_dep_children; 2780bd670b35SErik Nordmark prev = NULL; 2781bd670b35SErik Nordmark while (ire != NULL) { 2782bd670b35SErik Nordmark if (prev == NULL) { 2783bd670b35SErik Nordmark ASSERT(ire->ire_dep_sib_ptpn == 2784bd670b35SErik Nordmark &(parent->ire_dep_children)); 2785bd670b35SErik Nordmark } else { 2786bd670b35SErik Nordmark ASSERT(ire->ire_dep_sib_ptpn == 2787bd670b35SErik Nordmark &(prev->ire_dep_sib_next)); 2788bd670b35SErik Nordmark } 2789bd670b35SErik Nordmark if (ire == child) 2790bd670b35SErik Nordmark return (B_TRUE); 2791bd670b35SErik Nordmark prev = ire; 2792bd670b35SErik Nordmark ire = ire->ire_dep_sib_next; 2793bd670b35SErik Nordmark } 2794bd670b35SErik Nordmark return (B_FALSE); 2795bd670b35SErik Nordmark } 2796bd670b35SErik Nordmark 2797bd670b35SErik Nordmark static void 2798bd670b35SErik Nordmark ire_dep_verify(ire_t *ire) 2799bd670b35SErik Nordmark { 2800bd670b35SErik Nordmark ire_t *parent = ire->ire_dep_parent; 2801bd670b35SErik Nordmark ire_t *child = ire->ire_dep_children; 2802bd670b35SErik Nordmark 2803bd670b35SErik Nordmark ASSERT(ire->ire_ipversion == IPV4_VERSION || 2804bd670b35SErik Nordmark ire->ire_ipversion == IPV6_VERSION); 2805bd670b35SErik Nordmark if (parent != NULL) { 2806bd670b35SErik Nordmark ASSERT(parent->ire_ipversion == IPV4_VERSION || 2807bd670b35SErik Nordmark parent->ire_ipversion == IPV6_VERSION); 2808bd670b35SErik Nordmark ASSERT(parent->ire_refcnt >= 1); 2809bd670b35SErik Nordmark ASSERT(parent_has_child(parent, ire)); 2810bd670b35SErik Nordmark } 2811bd670b35SErik Nordmark if (child != NULL) { 2812bd670b35SErik Nordmark ASSERT(child->ire_ipversion == IPV4_VERSION || 2813bd670b35SErik Nordmark child->ire_ipversion == IPV6_VERSION); 2814bd670b35SErik Nordmark ASSERT(child->ire_dep_parent == ire); 2815bd670b35SErik Nordmark ASSERT(child->ire_dep_sib_ptpn != NULL); 2816bd670b35SErik Nordmark ASSERT(parent_has_child(ire, child)); 2817bd670b35SErik Nordmark } 2818bd670b35SErik Nordmark } 2819bd670b35SErik Nordmark #endif /* DEBUG */ 2820bd670b35SErik Nordmark 2821bd670b35SErik Nordmark /* 2822bd670b35SErik Nordmark * Assumes ire_dep_parent is set. Remove this child from its parent's linkage. 2823bd670b35SErik Nordmark */ 2824bd670b35SErik Nordmark void 2825bd670b35SErik Nordmark ire_dep_remove(ire_t *ire) 2826bd670b35SErik Nordmark { 2827bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 2828bd670b35SErik Nordmark ire_t *parent = ire->ire_dep_parent; 2829bd670b35SErik Nordmark ire_t *next; 2830bd670b35SErik Nordmark nce_t *nce; 2831bd670b35SErik Nordmark 2832bd670b35SErik Nordmark ASSERT(RW_WRITE_HELD(&ipst->ips_ire_dep_lock)); 2833bd670b35SErik Nordmark ASSERT(ire->ire_dep_parent != NULL); 2834bd670b35SErik Nordmark ASSERT(ire->ire_dep_sib_ptpn != NULL); 2835bd670b35SErik Nordmark 2836bd670b35SErik Nordmark #ifdef DEBUG 2837bd670b35SErik Nordmark ire_dep_verify(ire); 2838bd670b35SErik Nordmark ire_dep_verify(parent); 2839bd670b35SErik Nordmark #endif 2840bd670b35SErik Nordmark 2841bd670b35SErik Nordmark next = ire->ire_dep_sib_next; 2842bd670b35SErik Nordmark if (next != NULL) 2843bd670b35SErik Nordmark next->ire_dep_sib_ptpn = ire->ire_dep_sib_ptpn; 2844bd670b35SErik Nordmark 2845bd670b35SErik Nordmark ASSERT(*(ire->ire_dep_sib_ptpn) == ire); 2846bd670b35SErik Nordmark *(ire->ire_dep_sib_ptpn) = ire->ire_dep_sib_next; 2847bd670b35SErik Nordmark 2848bd670b35SErik Nordmark ire->ire_dep_sib_ptpn = NULL; 2849bd670b35SErik Nordmark ire->ire_dep_sib_next = NULL; 2850bd670b35SErik Nordmark 2851bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 2852bd670b35SErik Nordmark parent = ire->ire_dep_parent; 2853bd670b35SErik Nordmark ire->ire_dep_parent = NULL; 2854bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 2855bd670b35SErik Nordmark 2856bd670b35SErik Nordmark /* 2857bd670b35SErik Nordmark * Make sure all our children, grandchildren, etc set 2858bd670b35SErik Nordmark * ire_dep_parent_generation to IRE_GENERATION_VERIFY since 2859bd670b35SErik Nordmark * we can no longer guarantee than the children have a current 2860bd670b35SErik Nordmark * ire_nce_cache and ire_nexthop_ill(). 2861bd670b35SErik Nordmark */ 2862bd670b35SErik Nordmark if (ire->ire_dep_children != NULL) 2863bd670b35SErik Nordmark ire_dep_invalidate_children(ire->ire_dep_children); 2864bd670b35SErik Nordmark 2865bd670b35SErik Nordmark /* 2866bd670b35SErik Nordmark * Since the parent is gone we make sure we clear ire_nce_cache. 2867bd670b35SErik Nordmark * We can clear it under ire_lock even if the IRE is used 2868bd670b35SErik Nordmark */ 2869bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 2870bd670b35SErik Nordmark nce = ire->ire_nce_cache; 2871bd670b35SErik Nordmark ire->ire_nce_cache = NULL; 2872bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 2873bd670b35SErik Nordmark if (nce != NULL) 2874bd670b35SErik Nordmark nce_refrele(nce); 2875bd670b35SErik Nordmark 2876bd670b35SErik Nordmark #ifdef DEBUG 2877bd670b35SErik Nordmark ire_dep_verify(ire); 2878bd670b35SErik Nordmark ire_dep_verify(parent); 2879bd670b35SErik Nordmark #endif 2880bd670b35SErik Nordmark 2881bd670b35SErik Nordmark ire_refrele_notr(parent); 2882bd670b35SErik Nordmark ire_refrele_notr(ire); 2883bd670b35SErik Nordmark } 2884bd670b35SErik Nordmark 2885bd670b35SErik Nordmark /* 2886bd670b35SErik Nordmark * Insert the child in the linkage of the parent 2887bd670b35SErik Nordmark */ 2888bd670b35SErik Nordmark static void 2889bd670b35SErik Nordmark ire_dep_parent_insert(ire_t *child, ire_t *parent) 2890bd670b35SErik Nordmark { 2891bd670b35SErik Nordmark ip_stack_t *ipst = child->ire_ipst; 2892bd670b35SErik Nordmark ire_t *next; 2893bd670b35SErik Nordmark 2894bd670b35SErik Nordmark ASSERT(RW_WRITE_HELD(&ipst->ips_ire_dep_lock)); 2895bd670b35SErik Nordmark ASSERT(child->ire_dep_parent == NULL); 2896bd670b35SErik Nordmark 2897bd670b35SErik Nordmark #ifdef DEBUG 2898bd670b35SErik Nordmark ire_dep_verify(child); 2899bd670b35SErik Nordmark ire_dep_verify(parent); 2900bd670b35SErik Nordmark #endif 2901bd670b35SErik Nordmark /* No parents => no siblings */ 2902bd670b35SErik Nordmark ASSERT(child->ire_dep_sib_ptpn == NULL); 2903bd670b35SErik Nordmark ASSERT(child->ire_dep_sib_next == NULL); 2904bd670b35SErik Nordmark 2905bd670b35SErik Nordmark ire_refhold_notr(parent); 2906bd670b35SErik Nordmark ire_refhold_notr(child); 2907bd670b35SErik Nordmark 2908bd670b35SErik Nordmark /* Head insertion */ 2909bd670b35SErik Nordmark next = parent->ire_dep_children; 2910bd670b35SErik Nordmark if (next != NULL) { 2911bd670b35SErik Nordmark ASSERT(next->ire_dep_sib_ptpn == &(parent->ire_dep_children)); 2912bd670b35SErik Nordmark child->ire_dep_sib_next = next; 2913bd670b35SErik Nordmark next->ire_dep_sib_ptpn = &(child->ire_dep_sib_next); 2914bd670b35SErik Nordmark } 2915bd670b35SErik Nordmark parent->ire_dep_children = child; 2916bd670b35SErik Nordmark child->ire_dep_sib_ptpn = &(parent->ire_dep_children); 2917bd670b35SErik Nordmark 2918bd670b35SErik Nordmark mutex_enter(&child->ire_lock); 2919bd670b35SErik Nordmark child->ire_dep_parent = parent; 2920bd670b35SErik Nordmark mutex_exit(&child->ire_lock); 2921bd670b35SErik Nordmark 2922bd670b35SErik Nordmark #ifdef DEBUG 2923bd670b35SErik Nordmark ire_dep_verify(child); 2924bd670b35SErik Nordmark ire_dep_verify(parent); 2925bd670b35SErik Nordmark #endif 2926bd670b35SErik Nordmark } 2927bd670b35SErik Nordmark 2928bd670b35SErik Nordmark 2929bd670b35SErik Nordmark /* 2930bd670b35SErik Nordmark * Given count worth of ires and generations, build ire_dep_* relationships 2931bd670b35SErik Nordmark * from ires[0] to ires[count-1]. Record generations[i+1] in 2932bd670b35SErik Nordmark * ire_dep_parent_generation for ires[i]. 2933bd670b35SErik Nordmark * We graft onto an existing parent chain by making sure that we don't 2934bd670b35SErik Nordmark * touch ire_dep_parent for ires[count-1]. 2935bd670b35SErik Nordmark * 2936bd670b35SErik Nordmark * We check for any condemned ire_generation count and return B_FALSE in 2937bd670b35SErik Nordmark * that case so that the caller can tear it apart. 2938bd670b35SErik Nordmark * 2939bd670b35SErik Nordmark * Note that generations[0] is not used. Caller handles that. 2940bd670b35SErik Nordmark */ 2941bd670b35SErik Nordmark boolean_t 2942bd670b35SErik Nordmark ire_dep_build(ire_t *ires[], uint_t generations[], uint_t count) 2943bd670b35SErik Nordmark { 2944bd670b35SErik Nordmark ire_t *ire = ires[0]; 2945bd670b35SErik Nordmark ip_stack_t *ipst; 2946bd670b35SErik Nordmark uint_t i; 2947bd670b35SErik Nordmark 2948bd670b35SErik Nordmark ASSERT(count > 0); 2949bd670b35SErik Nordmark if (count == 1) { 2950bd670b35SErik Nordmark /* No work to do */ 2951bd670b35SErik Nordmark return (B_TRUE); 2952bd670b35SErik Nordmark } 2953bd670b35SErik Nordmark ipst = ire->ire_ipst; 2954bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_WRITER); 2955bd670b35SErik Nordmark /* 2956bd670b35SErik Nordmark * Do not remove the linkage for any existing parent chain i.e., 2957bd670b35SErik Nordmark * ires[count-1] is left alone. 2958bd670b35SErik Nordmark */ 2959bd670b35SErik Nordmark for (i = 0; i < count-1; i++) { 2960bd670b35SErik Nordmark /* Remove existing parent if we need to change it */ 2961bd670b35SErik Nordmark if (ires[i]->ire_dep_parent != NULL && 2962bd670b35SErik Nordmark ires[i]->ire_dep_parent != ires[i+1]) 2963bd670b35SErik Nordmark ire_dep_remove(ires[i]); 2964bd670b35SErik Nordmark } 2965bd670b35SErik Nordmark 2966bd670b35SErik Nordmark for (i = 0; i < count - 1; i++) { 2967bd670b35SErik Nordmark ASSERT(ires[i]->ire_ipversion == IPV4_VERSION || 2968bd670b35SErik Nordmark ires[i]->ire_ipversion == IPV6_VERSION); 2969bd670b35SErik Nordmark /* Does it need to change? */ 2970bd670b35SErik Nordmark if (ires[i]->ire_dep_parent != ires[i+1]) 2971bd670b35SErik Nordmark ire_dep_parent_insert(ires[i], ires[i+1]); 2972bd670b35SErik Nordmark 2973bd670b35SErik Nordmark mutex_enter(&ires[i+1]->ire_lock); 2974bd670b35SErik Nordmark if (IRE_IS_CONDEMNED(ires[i+1])) { 2975bd670b35SErik Nordmark mutex_exit(&ires[i+1]->ire_lock); 2976bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 2977bd670b35SErik Nordmark return (B_FALSE); 2978bd670b35SErik Nordmark } 2979bd670b35SErik Nordmark mutex_exit(&ires[i+1]->ire_lock); 2980bd670b35SErik Nordmark 2981bd670b35SErik Nordmark mutex_enter(&ires[i]->ire_lock); 2982bd670b35SErik Nordmark ires[i]->ire_dep_parent_generation = generations[i+1]; 2983bd670b35SErik Nordmark mutex_exit(&ires[i]->ire_lock); 2984bd670b35SErik Nordmark } 2985bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 2986bd670b35SErik Nordmark return (B_TRUE); 2987bd670b35SErik Nordmark } 2988bd670b35SErik Nordmark 2989bd670b35SErik Nordmark /* 2990bd670b35SErik Nordmark * Given count worth of ires, unbuild ire_dep_* relationships 2991bd670b35SErik Nordmark * from ires[0] to ires[count-1]. 2992bd670b35SErik Nordmark */ 2993bd670b35SErik Nordmark void 2994bd670b35SErik Nordmark ire_dep_unbuild(ire_t *ires[], uint_t count) 2995bd670b35SErik Nordmark { 2996bd670b35SErik Nordmark ip_stack_t *ipst; 2997bd670b35SErik Nordmark uint_t i; 2998bd670b35SErik Nordmark 2999bd670b35SErik Nordmark if (count == 0) { 3000bd670b35SErik Nordmark /* No work to do */ 3001bd670b35SErik Nordmark return; 3002bd670b35SErik Nordmark } 3003bd670b35SErik Nordmark ipst = ires[0]->ire_ipst; 3004bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_WRITER); 3005bd670b35SErik Nordmark for (i = 0; i < count; i++) { 3006bd670b35SErik Nordmark ASSERT(ires[i]->ire_ipversion == IPV4_VERSION || 3007bd670b35SErik Nordmark ires[i]->ire_ipversion == IPV6_VERSION); 3008bd670b35SErik Nordmark if (ires[i]->ire_dep_parent != NULL) 3009bd670b35SErik Nordmark ire_dep_remove(ires[i]); 3010bd670b35SErik Nordmark mutex_enter(&ires[i]->ire_lock); 3011bd670b35SErik Nordmark ires[i]->ire_dep_parent_generation = IRE_GENERATION_VERIFY; 3012bd670b35SErik Nordmark mutex_exit(&ires[i]->ire_lock); 3013bd670b35SErik Nordmark } 3014bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3015bd670b35SErik Nordmark } 3016bd670b35SErik Nordmark 3017bd670b35SErik Nordmark /* 3018bd670b35SErik Nordmark * Both the forwarding and the outbound code paths can trip on 3019bd670b35SErik Nordmark * a condemned NCE, in which case we call this function. 3020bd670b35SErik Nordmark * We have two different behaviors: if the NCE was UNREACHABLE 3021bd670b35SErik Nordmark * it is an indication that something failed. In that case 3022bd670b35SErik Nordmark * we see if we should look for a different IRE (for example, 3023bd670b35SErik Nordmark * delete any matching redirect IRE, or try a different 3024bd670b35SErik Nordmark * IRE_DEFAULT (ECMP)). We mark the ire as bad so a hopefully 3025bd670b35SErik Nordmark * different IRE will be picked next time we send/forward. 3026bd670b35SErik Nordmark * 3027bd670b35SErik Nordmark * If we are called by the output path then fail_if_better is set 3028bd670b35SErik Nordmark * and we return NULL if there could be a better IRE. This is because the 3029bd670b35SErik Nordmark * output path retries the IRE lookup. (The input/forward path can not retry.) 3030bd670b35SErik Nordmark * 3031bd670b35SErik Nordmark * If the NCE was not unreachable then we pick/allocate a 3032bd670b35SErik Nordmark * new (most likely ND_INITIAL) NCE and proceed with it. 3033bd670b35SErik Nordmark * 3034bd670b35SErik Nordmark * ipha/ip6h are needed for multicast packets; ipha needs to be 3035bd670b35SErik Nordmark * set for IPv4 and ip6h needs to be set for IPv6 packets. 3036bd670b35SErik Nordmark */ 3037bd670b35SErik Nordmark nce_t * 3038bd670b35SErik Nordmark ire_handle_condemned_nce(nce_t *nce, ire_t *ire, ipha_t *ipha, ip6_t *ip6h, 3039bd670b35SErik Nordmark boolean_t fail_if_better) 3040bd670b35SErik Nordmark { 3041bd670b35SErik Nordmark if (nce->nce_common->ncec_state == ND_UNREACHABLE) { 3042bd670b35SErik Nordmark if (ire_no_good(ire) && fail_if_better) { 3043bd670b35SErik Nordmark /* 3044bd670b35SErik Nordmark * Did some changes, or ECMP likely to exist. 3045bd670b35SErik Nordmark * Make ip_output look for a different IRE 3046bd670b35SErik Nordmark */ 3047bd670b35SErik Nordmark return (NULL); 3048bd670b35SErik Nordmark } 3049bd670b35SErik Nordmark } 3050bd670b35SErik Nordmark if (ire_revalidate_nce(ire) == ENETUNREACH) { 3051bd670b35SErik Nordmark /* The ire_dep_parent chain went bad, or no memory? */ 3052bd670b35SErik Nordmark (void) ire_no_good(ire); 3053bd670b35SErik Nordmark return (NULL); 3054bd670b35SErik Nordmark } 3055bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) { 3056bd670b35SErik Nordmark ASSERT(ipha != NULL); 3057bd670b35SErik Nordmark nce = ire_to_nce(ire, ipha->ipha_dst, NULL); 3058bd670b35SErik Nordmark } else { 3059bd670b35SErik Nordmark ASSERT(ip6h != NULL); 3060bd670b35SErik Nordmark nce = ire_to_nce(ire, INADDR_ANY, &ip6h->ip6_dst); 3061bd670b35SErik Nordmark } 3062bd670b35SErik Nordmark 3063bd670b35SErik Nordmark if (nce == NULL) 3064bd670b35SErik Nordmark return (NULL); 3065bd670b35SErik Nordmark if (nce->nce_is_condemned) { 3066bd670b35SErik Nordmark nce_refrele(nce); 3067bd670b35SErik Nordmark return (NULL); 3068bd670b35SErik Nordmark } 3069bd670b35SErik Nordmark return (nce); 3070bd670b35SErik Nordmark } 3071bd670b35SErik Nordmark 3072bd670b35SErik Nordmark /* 3073bd670b35SErik Nordmark * The caller has found that the ire is bad, either due to a reference to an NCE 3074bd670b35SErik Nordmark * in ND_UNREACHABLE state, or a MULTIRT route whose gateway can't be resolved. 3075bd670b35SErik Nordmark * We update things so a subsequent attempt to send to the destination 3076bd670b35SErik Nordmark * is likely to find different IRE, or that a new NCE would be created. 3077bd670b35SErik Nordmark * 3078bd670b35SErik Nordmark * Returns B_TRUE if it is likely that a subsequent ire_ftable_lookup would 3079bd670b35SErik Nordmark * find a different route (either due to having deleted a redirect, or there 3080bd670b35SErik Nordmark * being ECMP routes.) 3081bd670b35SErik Nordmark * 3082bd670b35SErik Nordmark * If we have a redirect (RTF_DYNAMIC) we delete it. 3083bd670b35SErik Nordmark * Otherwise we increment ire_badcnt and increment the generation number so 3084bd670b35SErik Nordmark * that a cached ixa_ire will redo the route selection. ire_badcnt is taken 3085bd670b35SErik Nordmark * into account in the route selection when we have multiple choices (multiple 3086bd670b35SErik Nordmark * default routes or ECMP in general). 3087bd670b35SErik Nordmark * Any time ip_select_route find an ire with a condemned ire_nce_cache 3088bd670b35SErik Nordmark * (e.g., if no equal cost route to the bad one) ip_select_route will make 3089bd670b35SErik Nordmark * sure the NCE is revalidated to avoid getting stuck on a 3090bd670b35SErik Nordmark * NCE_F_CONDMNED ncec that caused ire_no_good to be called. 3091bd670b35SErik Nordmark */ 3092bd670b35SErik Nordmark boolean_t 3093bd670b35SErik Nordmark ire_no_good(ire_t *ire) 3094bd670b35SErik Nordmark { 3095bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 3096bd670b35SErik Nordmark ire_t *ire2; 3097bd670b35SErik Nordmark nce_t *nce; 3098bd670b35SErik Nordmark 3099bd670b35SErik Nordmark if (ire->ire_flags & RTF_DYNAMIC) { 3100bd670b35SErik Nordmark ire_delete(ire); 3101bd670b35SErik Nordmark return (B_TRUE); 3102bd670b35SErik Nordmark } 3103bd670b35SErik Nordmark if (ire->ire_flags & RTF_INDIRECT) { 3104bd670b35SErik Nordmark /* Check if next IRE is a redirect */ 3105bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 3106bd670b35SErik Nordmark if (ire->ire_dep_parent != NULL && 3107bd670b35SErik Nordmark (ire->ire_dep_parent->ire_flags & RTF_DYNAMIC)) { 3108bd670b35SErik Nordmark ire2 = ire->ire_dep_parent; 3109bd670b35SErik Nordmark ire_refhold(ire2); 3110bd670b35SErik Nordmark } else { 3111bd670b35SErik Nordmark ire2 = NULL; 3112bd670b35SErik Nordmark } 3113bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3114bd670b35SErik Nordmark if (ire2 != NULL) { 3115bd670b35SErik Nordmark ire_delete(ire2); 3116bd670b35SErik Nordmark ire_refrele(ire2); 3117bd670b35SErik Nordmark return (B_TRUE); 3118bd670b35SErik Nordmark } 3119bd670b35SErik Nordmark } 3120bd670b35SErik Nordmark /* 3121bd670b35SErik Nordmark * No redirect involved. Increment badcnt so that if we have ECMP 3122bd670b35SErik Nordmark * routes we are likely to pick a different one for the next packet. 3123bd670b35SErik Nordmark * 3124bd670b35SErik Nordmark * If the NCE is unreachable and condemned we should drop the reference 3125bd670b35SErik Nordmark * to it so that a new NCE can be created. 3126bd670b35SErik Nordmark * 3127bd670b35SErik Nordmark * Finally we increment the generation number so that any ixa_ire 3128bd670b35SErik Nordmark * cache will be revalidated. 3129bd670b35SErik Nordmark */ 3130bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 3131bd670b35SErik Nordmark ire->ire_badcnt++; 3132d3d50737SRafael Vanoni ire->ire_last_badcnt = TICK_TO_SEC(ddi_get_lbolt64()); 3133bd670b35SErik Nordmark nce = ire->ire_nce_cache; 3134bd670b35SErik Nordmark if (nce != NULL && nce->nce_is_condemned && 3135bd670b35SErik Nordmark nce->nce_common->ncec_state == ND_UNREACHABLE) 3136bd670b35SErik Nordmark ire->ire_nce_cache = NULL; 3137bd670b35SErik Nordmark else 3138bd670b35SErik Nordmark nce = NULL; 3139bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3140bd670b35SErik Nordmark if (nce != NULL) 3141bd670b35SErik Nordmark nce_refrele(nce); 3142bd670b35SErik Nordmark 3143bd670b35SErik Nordmark ire_increment_generation(ire); 3144bd670b35SErik Nordmark ire_dep_incr_generation(ire); 3145bd670b35SErik Nordmark 3146bd670b35SErik Nordmark return (ire->ire_bucket->irb_ire_cnt > 1); 3147bd670b35SErik Nordmark } 3148bd670b35SErik Nordmark 3149bd670b35SErik Nordmark /* 3150bd670b35SErik Nordmark * Walk ire_dep_parent chain and validate that ire_dep_parent->ire_generation == 3151bd670b35SErik Nordmark * ire_dep_parent_generation. 3152bd670b35SErik Nordmark * If they all match we just return ire_generation from the topmost IRE. 3153bd670b35SErik Nordmark * Otherwise we propagate the mismatch by setting all ire_dep_parent_generation 3154bd670b35SErik Nordmark * above the mismatch to IRE_GENERATION_VERIFY and also returning 3155bd670b35SErik Nordmark * IRE_GENERATION_VERIFY. 3156bd670b35SErik Nordmark */ 3157bd670b35SErik Nordmark uint_t 3158bd670b35SErik Nordmark ire_dep_validate_generations(ire_t *ire) 3159bd670b35SErik Nordmark { 3160bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 3161bd670b35SErik Nordmark uint_t generation; 3162bd670b35SErik Nordmark ire_t *ire1; 3163bd670b35SErik Nordmark 3164bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 3165bd670b35SErik Nordmark generation = ire->ire_generation; /* Assuming things match */ 3166bd670b35SErik Nordmark for (ire1 = ire; ire1 != NULL; ire1 = ire1->ire_dep_parent) { 3167bd670b35SErik Nordmark ASSERT(ire1->ire_ipversion == IPV4_VERSION || 3168bd670b35SErik Nordmark ire1->ire_ipversion == IPV6_VERSION); 3169bd670b35SErik Nordmark if (ire1->ire_dep_parent == NULL) 3170bd670b35SErik Nordmark break; 3171bd670b35SErik Nordmark if (ire1->ire_dep_parent_generation != 3172bd670b35SErik Nordmark ire1->ire_dep_parent->ire_generation) 3173bd670b35SErik Nordmark goto mismatch; 3174bd670b35SErik Nordmark } 3175bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3176bd670b35SErik Nordmark return (generation); 3177bd670b35SErik Nordmark 3178bd670b35SErik Nordmark mismatch: 3179bd670b35SErik Nordmark generation = IRE_GENERATION_VERIFY; 3180bd670b35SErik Nordmark /* Fill from top down to the mismatch with _VERIFY */ 3181bd670b35SErik Nordmark while (ire != ire1) { 3182bd670b35SErik Nordmark ASSERT(ire->ire_ipversion == IPV4_VERSION || 3183bd670b35SErik Nordmark ire->ire_ipversion == IPV6_VERSION); 3184bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 3185bd670b35SErik Nordmark ire->ire_dep_parent_generation = IRE_GENERATION_VERIFY; 3186bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3187bd670b35SErik Nordmark ire = ire->ire_dep_parent; 3188bd670b35SErik Nordmark } 3189bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3190bd670b35SErik Nordmark return (generation); 3191bd670b35SErik Nordmark } 3192bd670b35SErik Nordmark 3193bd670b35SErik Nordmark /* 3194bd670b35SErik Nordmark * Used when we need to return an ire with ire_dep_parent, but we 3195bd670b35SErik Nordmark * know the chain is invalid for instance we didn't create an IRE_IF_CLONE 3196bd670b35SErik Nordmark * Using IRE_GENERATION_VERIFY means that next time we'll redo the 3197bd670b35SErik Nordmark * recursive lookup. 3198bd670b35SErik Nordmark */ 3199bd670b35SErik Nordmark void 3200bd670b35SErik Nordmark ire_dep_invalidate_generations(ire_t *ire) 3201bd670b35SErik Nordmark { 3202bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 3203bd670b35SErik Nordmark 3204bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 3205bd670b35SErik Nordmark while (ire != NULL) { 3206bd670b35SErik Nordmark ASSERT(ire->ire_ipversion == IPV4_VERSION || 3207bd670b35SErik Nordmark ire->ire_ipversion == IPV6_VERSION); 3208bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 3209bd670b35SErik Nordmark ire->ire_dep_parent_generation = IRE_GENERATION_VERIFY; 3210bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3211bd670b35SErik Nordmark ire = ire->ire_dep_parent; 3212bd670b35SErik Nordmark } 3213bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3214bd670b35SErik Nordmark } 3215bd670b35SErik Nordmark 3216bd670b35SErik Nordmark /* Set _VERIFY ire_dep_parent_generation for all children recursively */ 3217bd670b35SErik Nordmark static void 3218bd670b35SErik Nordmark ire_dep_invalidate_children(ire_t *child) 3219bd670b35SErik Nordmark { 3220bd670b35SErik Nordmark ip_stack_t *ipst = child->ire_ipst; 3221bd670b35SErik Nordmark 3222bd670b35SErik Nordmark ASSERT(RW_WRITE_HELD(&ipst->ips_ire_dep_lock)); 3223bd670b35SErik Nordmark /* Depth first */ 3224bd670b35SErik Nordmark if (child->ire_dep_children != NULL) 3225bd670b35SErik Nordmark ire_dep_invalidate_children(child->ire_dep_children); 3226bd670b35SErik Nordmark 3227bd670b35SErik Nordmark while (child != NULL) { 3228bd670b35SErik Nordmark mutex_enter(&child->ire_lock); 3229bd670b35SErik Nordmark child->ire_dep_parent_generation = IRE_GENERATION_VERIFY; 3230bd670b35SErik Nordmark mutex_exit(&child->ire_lock); 3231bd670b35SErik Nordmark child = child->ire_dep_sib_next; 3232bd670b35SErik Nordmark } 3233bd670b35SErik Nordmark } 3234bd670b35SErik Nordmark 3235bd670b35SErik Nordmark static void 3236bd670b35SErik Nordmark ire_dep_increment_children(ire_t *child) 3237bd670b35SErik Nordmark { 3238bd670b35SErik Nordmark ip_stack_t *ipst = child->ire_ipst; 3239bd670b35SErik Nordmark 3240bd670b35SErik Nordmark ASSERT(RW_READ_HELD(&ipst->ips_ire_dep_lock)); 3241bd670b35SErik Nordmark /* Depth first */ 3242bd670b35SErik Nordmark if (child->ire_dep_children != NULL) 3243bd670b35SErik Nordmark ire_dep_increment_children(child->ire_dep_children); 3244bd670b35SErik Nordmark 3245bd670b35SErik Nordmark while (child != NULL) { 3246bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(child)) 3247bd670b35SErik Nordmark ire_increment_generation(child); 3248bd670b35SErik Nordmark child = child->ire_dep_sib_next; 3249bd670b35SErik Nordmark } 3250bd670b35SErik Nordmark } 3251bd670b35SErik Nordmark 3252bd670b35SErik Nordmark /* 3253bd670b35SErik Nordmark * Walk all the children of this ire recursively and increment their 3254bd670b35SErik Nordmark * generation number. 3255bd670b35SErik Nordmark */ 3256f1c454b4SSowmini Varadhan static void 3257f1c454b4SSowmini Varadhan ire_dep_incr_generation_locked(ire_t *parent) 3258f1c454b4SSowmini Varadhan { 3259f1c454b4SSowmini Varadhan ASSERT(RW_READ_HELD(&parent->ire_ipst->ips_ire_dep_lock)); 3260f1c454b4SSowmini Varadhan if (parent->ire_dep_children != NULL) 3261f1c454b4SSowmini Varadhan ire_dep_increment_children(parent->ire_dep_children); 3262f1c454b4SSowmini Varadhan } 3263f1c454b4SSowmini Varadhan 3264bd670b35SErik Nordmark void 3265bd670b35SErik Nordmark ire_dep_incr_generation(ire_t *parent) 3266bd670b35SErik Nordmark { 3267bd670b35SErik Nordmark ip_stack_t *ipst = parent->ire_ipst; 3268bd670b35SErik Nordmark 3269bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 3270f1c454b4SSowmini Varadhan ire_dep_incr_generation_locked(parent); 3271bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3272bd670b35SErik Nordmark } 3273bd670b35SErik Nordmark 3274bd670b35SErik Nordmark /* 3275bd670b35SErik Nordmark * Get a new ire_nce_cache for this IRE as well as its nexthop. 3276bd670b35SErik Nordmark * Returns zero if it succeeds. Can fail due to lack of memory or when 3277bd670b35SErik Nordmark * the route has become unreachable. Returns ENOMEM and ENETUNREACH in those 3278bd670b35SErik Nordmark * cases. 3279bd670b35SErik Nordmark * 3280bd670b35SErik Nordmark * In the in.mpathd case, the ire will have ire_testhidden 3281bd670b35SErik Nordmark * set; so we should create the ncec for the underlying ill. 3282bd670b35SErik Nordmark * 3283bd670b35SErik Nordmark * Note that the error returned by ire_revalidate_nce() is ignored by most 3284bd670b35SErik Nordmark * callers except ire_handle_condemned_nce(), which handles the ENETUNREACH 3285bd670b35SErik Nordmark * error to mark potentially bad ire's. For all the other callers, an 3286bd670b35SErik Nordmark * error return could indicate a transient condition like ENOMEM, or could 3287bd670b35SErik Nordmark * be the result of an interface that is going down/unplumbing. In the former 3288bd670b35SErik Nordmark * case (transient error), we would leave the old stale ire/ire_nce_cache 3289bd670b35SErik Nordmark * in place, and possibly use incorrect link-layer information to send packets 3290bd670b35SErik Nordmark * but would eventually recover. In the latter case (ill down/replumb), 3291bd670b35SErik Nordmark * ire_revalidate_nce() might return a condemned nce back, but we would then 3292bd670b35SErik Nordmark * recover in the packet output path. 3293bd670b35SErik Nordmark */ 3294bd670b35SErik Nordmark int 3295bd670b35SErik Nordmark ire_revalidate_nce(ire_t *ire) 3296bd670b35SErik Nordmark { 3297bd670b35SErik Nordmark nce_t *nce, *old_nce; 3298bd670b35SErik Nordmark ire_t *nexthop; 3299bd670b35SErik Nordmark 3300bd670b35SErik Nordmark /* 3301bd670b35SErik Nordmark * For multicast we conceptually have an NCE but we don't store it 3302bd670b35SErik Nordmark * in ire_nce_cache; when ire_to_nce is called we allocate the nce. 3303bd670b35SErik Nordmark */ 3304bd670b35SErik Nordmark if (ire->ire_type & IRE_MULTICAST) 3305bd670b35SErik Nordmark return (0); 3306bd670b35SErik Nordmark 3307bd670b35SErik Nordmark /* ire_testhidden should only be set on under-interfaces */ 3308bd670b35SErik Nordmark ASSERT(!ire->ire_testhidden || !IS_IPMP(ire->ire_ill)); 3309bd670b35SErik Nordmark 3310bd670b35SErik Nordmark nexthop = ire_nexthop(ire); 3311bd670b35SErik Nordmark if (nexthop == NULL) { 3312bd670b35SErik Nordmark /* The route is potentially bad */ 3313bd670b35SErik Nordmark (void) ire_no_good(ire); 3314bd670b35SErik Nordmark return (ENETUNREACH); 3315bd670b35SErik Nordmark } 3316bd670b35SErik Nordmark if (ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK)) { 3317bd670b35SErik Nordmark ASSERT(ire->ire_ill != NULL); 3318bd670b35SErik Nordmark 3319bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) 3320bd670b35SErik Nordmark nce = nce_lookup_v4(ire->ire_ill, &ire->ire_addr); 3321bd670b35SErik Nordmark else 3322bd670b35SErik Nordmark nce = nce_lookup_v6(ire->ire_ill, &ire->ire_addr_v6); 3323bd670b35SErik Nordmark } else { 3324bd670b35SErik Nordmark ASSERT(nexthop->ire_type & IRE_ONLINK); 3325bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) { 3326bd670b35SErik Nordmark nce = arp_nce_init(nexthop->ire_ill, nexthop->ire_addr, 3327bd670b35SErik Nordmark nexthop->ire_type); 3328bd670b35SErik Nordmark } else { 3329bd670b35SErik Nordmark nce = ndp_nce_init(nexthop->ire_ill, 3330bd670b35SErik Nordmark &nexthop->ire_addr_v6, nexthop->ire_type); 3331bd670b35SErik Nordmark } 3332bd670b35SErik Nordmark } 3333bd670b35SErik Nordmark if (nce == NULL) { 3334bd670b35SErik Nordmark /* 3335bd670b35SErik Nordmark * Leave the old stale one in place to avoid a NULL 3336bd670b35SErik Nordmark * ire_nce_cache. 3337bd670b35SErik Nordmark */ 3338bd670b35SErik Nordmark ire_refrele(nexthop); 3339bd670b35SErik Nordmark return (ENOMEM); 3340bd670b35SErik Nordmark } 3341bd670b35SErik Nordmark 3342bd670b35SErik Nordmark if (nexthop != ire) { 3343bd670b35SErik Nordmark /* Update the nexthop ire */ 3344bd670b35SErik Nordmark mutex_enter(&nexthop->ire_lock); 3345bd670b35SErik Nordmark old_nce = nexthop->ire_nce_cache; 3346bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(nexthop)) { 3347bd670b35SErik Nordmark nce_refhold(nce); 3348bd670b35SErik Nordmark nexthop->ire_nce_cache = nce; 3349bd670b35SErik Nordmark } else { 3350bd670b35SErik Nordmark nexthop->ire_nce_cache = NULL; 3351bd670b35SErik Nordmark } 3352bd670b35SErik Nordmark mutex_exit(&nexthop->ire_lock); 3353bd670b35SErik Nordmark if (old_nce != NULL) 3354bd670b35SErik Nordmark nce_refrele(old_nce); 3355bd670b35SErik Nordmark } 3356bd670b35SErik Nordmark ire_refrele(nexthop); 3357bd670b35SErik Nordmark 3358bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 3359bd670b35SErik Nordmark old_nce = ire->ire_nce_cache; 3360bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(ire)) { 3361bd670b35SErik Nordmark nce_refhold(nce); 3362bd670b35SErik Nordmark ire->ire_nce_cache = nce; 3363bd670b35SErik Nordmark } else { 3364bd670b35SErik Nordmark ire->ire_nce_cache = NULL; 3365bd670b35SErik Nordmark } 3366bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3367bd670b35SErik Nordmark if (old_nce != NULL) 3368bd670b35SErik Nordmark nce_refrele(old_nce); 3369bd670b35SErik Nordmark 3370bd670b35SErik Nordmark nce_refrele(nce); 3371c793af95Ssangeeta return (0); 3372c793af95Ssangeeta } 33735b17e9bdSJon Anderson 33745b17e9bdSJon Anderson /* 3375bd670b35SErik Nordmark * Get a held nce for a given ire. 3376bd670b35SErik Nordmark * In the common case this is just from ire_nce_cache. 3377bd670b35SErik Nordmark * For IRE_MULTICAST this needs to do an explicit lookup since we do not 3378bd670b35SErik Nordmark * have an IRE_MULTICAST per address. 3379bd670b35SErik Nordmark * Note that this explicitly returns CONDEMNED NCEs. The caller needs those 3380bd670b35SErik Nordmark * so they can check whether the NCE went unreachable (as opposed to was 3381bd670b35SErik Nordmark * condemned for some other reason). 33825b17e9bdSJon Anderson */ 3383bd670b35SErik Nordmark nce_t * 3384bd670b35SErik Nordmark ire_to_nce(ire_t *ire, ipaddr_t v4nexthop, const in6_addr_t *v6nexthop) 33855b17e9bdSJon Anderson { 3386bd670b35SErik Nordmark nce_t *nce; 33875b17e9bdSJon Anderson 3388bd670b35SErik Nordmark if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) 3389bd670b35SErik Nordmark return (NULL); 3390bd670b35SErik Nordmark 3391bd670b35SErik Nordmark /* ire_testhidden should only be set on under-interfaces */ 3392bd670b35SErik Nordmark ASSERT(!ire->ire_testhidden || !IS_IPMP(ire->ire_ill)); 3393bd670b35SErik Nordmark 3394bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 3395bd670b35SErik Nordmark nce = ire->ire_nce_cache; 3396bd670b35SErik Nordmark if (nce != NULL) { 3397bd670b35SErik Nordmark nce_refhold(nce); 3398bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3399bd670b35SErik Nordmark return (nce); 3400bd670b35SErik Nordmark } 3401bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3402bd670b35SErik Nordmark 3403bd670b35SErik Nordmark if (ire->ire_type & IRE_MULTICAST) { 3404bd670b35SErik Nordmark ASSERT(ire->ire_ill != NULL); 3405bd670b35SErik Nordmark 3406bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) { 3407bd670b35SErik Nordmark ASSERT(v6nexthop == NULL); 3408bd670b35SErik Nordmark 3409bd670b35SErik Nordmark nce = arp_nce_init(ire->ire_ill, v4nexthop, 3410bd670b35SErik Nordmark ire->ire_type); 3411bd670b35SErik Nordmark } else { 3412bd670b35SErik Nordmark ASSERT(v6nexthop != NULL); 3413bd670b35SErik Nordmark ASSERT(v4nexthop == 0); 3414bd670b35SErik Nordmark nce = ndp_nce_init(ire->ire_ill, v6nexthop, 3415bd670b35SErik Nordmark ire->ire_type); 3416bd670b35SErik Nordmark } 3417bd670b35SErik Nordmark return (nce); 3418bd670b35SErik Nordmark } 34195b17e9bdSJon Anderson return (NULL); 34205b17e9bdSJon Anderson } 34215b17e9bdSJon Anderson 3422bd670b35SErik Nordmark nce_t * 3423bd670b35SErik Nordmark ire_to_nce_pkt(ire_t *ire, mblk_t *mp) 3424bd670b35SErik Nordmark { 3425bd670b35SErik Nordmark ipha_t *ipha; 3426bd670b35SErik Nordmark ip6_t *ip6h; 34275b17e9bdSJon Anderson 3428bd670b35SErik Nordmark if (IPH_HDR_VERSION(mp->b_rptr) == IPV4_VERSION) { 3429bd670b35SErik Nordmark ipha = (ipha_t *)mp->b_rptr; 3430bd670b35SErik Nordmark return (ire_to_nce(ire, ipha->ipha_dst, NULL)); 3431bd670b35SErik Nordmark } else { 3432bd670b35SErik Nordmark ip6h = (ip6_t *)mp->b_rptr; 3433bd670b35SErik Nordmark return (ire_to_nce(ire, INADDR_ANY, &ip6h->ip6_dst)); 3434bd670b35SErik Nordmark } 34355b17e9bdSJon Anderson } 34365b17e9bdSJon Anderson 34375b17e9bdSJon Anderson /* 3438bd670b35SErik Nordmark * Given an IRE_INTERFACE (that matches more than one address) create 3439bd670b35SErik Nordmark * and return an IRE_IF_CLONE for the specific address. 3440bd670b35SErik Nordmark * Return the generation number. 3441bd670b35SErik Nordmark * Returns NULL is no memory for the IRE. 3442bd670b35SErik Nordmark * Handles both IPv4 and IPv6. 34435b17e9bdSJon Anderson */ 34445b17e9bdSJon Anderson ire_t * 3445bd670b35SErik Nordmark ire_create_if_clone(ire_t *ire_if, const in6_addr_t *addr, uint_t *generationp) 34465b17e9bdSJon Anderson { 3447bd670b35SErik Nordmark ire_t *ire; 3448bd670b35SErik Nordmark ire_t *nire; 34495b17e9bdSJon Anderson 3450bd670b35SErik Nordmark if (ire_if->ire_ipversion == IPV4_VERSION) { 3451bd670b35SErik Nordmark ipaddr_t v4addr; 3452bd670b35SErik Nordmark ipaddr_t mask = IP_HOST_MASK; 34535b17e9bdSJon Anderson 3454bd670b35SErik Nordmark ASSERT(IN6_IS_ADDR_V4MAPPED(addr)); 3455bd670b35SErik Nordmark IN6_V4MAPPED_TO_IPADDR(addr, v4addr); 3456bd670b35SErik Nordmark 3457bd670b35SErik Nordmark ire = ire_create( 3458bd670b35SErik Nordmark (uchar_t *)&v4addr, /* dest address */ 3459bd670b35SErik Nordmark (uchar_t *)&mask, /* mask */ 3460bd670b35SErik Nordmark (uchar_t *)&ire_if->ire_gateway_addr, 3461bd670b35SErik Nordmark IRE_IF_CLONE, /* IRE type */ 3462bd670b35SErik Nordmark ire_if->ire_ill, 3463bd670b35SErik Nordmark ire_if->ire_zoneid, 3464bd670b35SErik Nordmark ire_if->ire_flags | RTF_HOST, 3465bd670b35SErik Nordmark NULL, /* No security attr for IRE_IF_ALL */ 3466bd670b35SErik Nordmark ire_if->ire_ipst); 3467bd670b35SErik Nordmark } else { 3468bd670b35SErik Nordmark ASSERT(!IN6_IS_ADDR_V4MAPPED(addr)); 3469bd670b35SErik Nordmark ire = ire_create_v6( 3470bd670b35SErik Nordmark addr, /* dest address */ 3471bd670b35SErik Nordmark &ipv6_all_ones, /* mask */ 3472bd670b35SErik Nordmark &ire_if->ire_gateway_addr_v6, /* gateway addr */ 3473bd670b35SErik Nordmark IRE_IF_CLONE, /* IRE type */ 3474bd670b35SErik Nordmark ire_if->ire_ill, 3475bd670b35SErik Nordmark ire_if->ire_zoneid, 3476bd670b35SErik Nordmark ire_if->ire_flags | RTF_HOST, 3477bd670b35SErik Nordmark NULL, /* No security attr for IRE_IF_ALL */ 3478bd670b35SErik Nordmark ire_if->ire_ipst); 3479bd670b35SErik Nordmark } 3480bd670b35SErik Nordmark if (ire == NULL) 3481bd670b35SErik Nordmark return (NULL); 3482bd670b35SErik Nordmark 3483bd670b35SErik Nordmark /* Take the metrics, in particular the mtu, from the IRE_IF */ 3484bd670b35SErik Nordmark ire->ire_metrics = ire_if->ire_metrics; 3485bd670b35SErik Nordmark 3486bd670b35SErik Nordmark nire = ire_add(ire); 3487bd670b35SErik Nordmark if (nire == NULL) /* Some failure */ 3488bd670b35SErik Nordmark return (NULL); 3489bd670b35SErik Nordmark 3490bd670b35SErik Nordmark if (generationp != NULL) 3491bd670b35SErik Nordmark *generationp = nire->ire_generation; 3492bd670b35SErik Nordmark 3493bd670b35SErik Nordmark /* 3494bd670b35SErik Nordmark * Make sure races don't add a duplicate by 3495bd670b35SErik Nordmark * catching the case when an identical was returned. 3496bd670b35SErik Nordmark */ 3497bd670b35SErik Nordmark if (nire != ire) { 3498bd670b35SErik Nordmark ASSERT(nire->ire_identical_ref > 1); 3499bd670b35SErik Nordmark ire_delete(nire); 3500bd670b35SErik Nordmark } 3501bd670b35SErik Nordmark return (nire); 3502bd670b35SErik Nordmark } 3503bd670b35SErik Nordmark 3504bd670b35SErik Nordmark /* 3505bd670b35SErik Nordmark * The argument is an IRE_INTERFACE. Delete all of IRE_IF_CLONE in the 3506bd670b35SErik Nordmark * ire_dep_children (just walk the ire_dep_sib_next since they are all 3507bd670b35SErik Nordmark * immediate children.) 3508bd670b35SErik Nordmark * Since we hold a lock while we remove them we need to defer the actual 3509bd670b35SErik Nordmark * calls to ire_delete() until we have dropped the lock. This makes things 3510bd670b35SErik Nordmark * less efficient since we restart at the top after dropping the lock. But 3511bd670b35SErik Nordmark * we only run when an IRE_INTERFACE is deleted which is infrquent. 3512bd670b35SErik Nordmark * 3513bd670b35SErik Nordmark * Note that ire_dep_children can be any mixture of offlink routes and 3514bd670b35SErik Nordmark * IRE_IF_CLONE entries. 3515bd670b35SErik Nordmark */ 3516bd670b35SErik Nordmark void 3517bd670b35SErik Nordmark ire_dep_delete_if_clone(ire_t *parent) 3518bd670b35SErik Nordmark { 3519bd670b35SErik Nordmark ip_stack_t *ipst = parent->ire_ipst; 3520bd670b35SErik Nordmark ire_t *child, *next; 3521bd670b35SErik Nordmark 3522bd670b35SErik Nordmark restart: 3523bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 3524bd670b35SErik Nordmark if (parent->ire_dep_children == NULL) { 3525bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3526bd670b35SErik Nordmark return; 3527bd670b35SErik Nordmark } 3528bd670b35SErik Nordmark child = parent->ire_dep_children; 3529bd670b35SErik Nordmark while (child != NULL) { 3530bd670b35SErik Nordmark next = child->ire_dep_sib_next; 3531bd670b35SErik Nordmark if ((child->ire_type & IRE_IF_CLONE) && 3532bd670b35SErik Nordmark !IRE_IS_CONDEMNED(child)) { 3533bd670b35SErik Nordmark ire_refhold(child); 3534bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3535bd670b35SErik Nordmark ire_delete(child); 3536bd670b35SErik Nordmark ASSERT(IRE_IS_CONDEMNED(child)); 3537bd670b35SErik Nordmark ire_refrele(child); 3538bd670b35SErik Nordmark goto restart; 3539bd670b35SErik Nordmark } 3540bd670b35SErik Nordmark child = next; 3541bd670b35SErik Nordmark } 3542bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3543bd670b35SErik Nordmark } 3544bd670b35SErik Nordmark 3545bd670b35SErik Nordmark /* 3546bd670b35SErik Nordmark * ire_pref() is used in recursive route-resolution for a destination to 3547bd670b35SErik Nordmark * determine the preference of an ire, where "preference" is determined 3548bd670b35SErik Nordmark * based on the level of indirection to the destination of the ire. 3549bd670b35SErik Nordmark * A higher preference indicates that fewer lookups are needed to complete 3550bd670b35SErik Nordmark * recursive route lookup. Thus 3551bd670b35SErik Nordmark * ire_pref(RTF_INDIRECT) < ire_pref(IRE_IF_RESOLVER) < ire_pref(IRE_PREF_CLONE) 3552bd670b35SErik Nordmark */ 3553bd670b35SErik Nordmark int 3554bd670b35SErik Nordmark ire_pref(ire_t *ire) 3555bd670b35SErik Nordmark { 3556bd670b35SErik Nordmark if (ire->ire_flags & RTF_INDIRECT) 3557bd670b35SErik Nordmark return (1); 3558bd670b35SErik Nordmark if (ire->ire_type & IRE_OFFLINK) 3559bd670b35SErik Nordmark return (2); 3560bd670b35SErik Nordmark if (ire->ire_type & (IRE_IF_RESOLVER|IRE_IF_NORESOLVER)) 3561bd670b35SErik Nordmark return (3); 3562bd670b35SErik Nordmark if (ire->ire_type & IRE_IF_CLONE) 3563bd670b35SErik Nordmark return (4); 3564bd670b35SErik Nordmark if (ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK|IRE_BROADCAST)) 3565bd670b35SErik Nordmark return (5); 3566bd670b35SErik Nordmark return (-1); /* unknown ire_type */ 35675b17e9bdSJon Anderson } 3568