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 /* 22e11c3f44Smeem * Copyright 2009 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 2337c478bd9Sstevel@tonic-gate 2347c478bd9Sstevel@tonic-gate /* 235bd670b35SErik Nordmark * Following are the functions to increment/decrement the reference 236bd670b35SErik Nordmark * count of the IREs and IRBs (ire bucket). 237bd670b35SErik Nordmark * 238bd670b35SErik Nordmark * 1) We bump up the reference count of an IRE to make sure that 239bd670b35SErik Nordmark * it does not get deleted and freed while we are using it. 240bd670b35SErik Nordmark * Typically all the lookup functions hold the bucket lock, 241bd670b35SErik Nordmark * and look for the IRE. If it finds an IRE, it bumps up the 242bd670b35SErik Nordmark * reference count before dropping the lock. Sometimes we *may* want 243bd670b35SErik Nordmark * to bump up the reference count after we *looked* up i.e without 244bd670b35SErik Nordmark * holding the bucket lock. So, the ire_refhold function does not assert 245bd670b35SErik Nordmark * on the bucket lock being held. Any thread trying to delete from 246bd670b35SErik Nordmark * the hash bucket can still do so but cannot free the IRE if 247bd670b35SErik Nordmark * ire_refcnt is not 0. 248bd670b35SErik Nordmark * 249bd670b35SErik Nordmark * 2) We bump up the reference count on the bucket where the IRE resides 250bd670b35SErik Nordmark * (IRB), when we want to prevent the IREs getting deleted from a given 251bd670b35SErik Nordmark * hash bucket. This makes life easier for ire_walk type functions which 252bd670b35SErik Nordmark * wants to walk the IRE list, call a function, but needs to drop 253bd670b35SErik Nordmark * the bucket lock to prevent recursive rw_enters. While the 254bd670b35SErik Nordmark * lock is dropped, the list could be changed by other threads or 255bd670b35SErik Nordmark * the same thread could end up deleting the ire or the ire pointed by 256bd670b35SErik Nordmark * ire_next. ire_refholding the ire or ire_next is not sufficient as 257bd670b35SErik Nordmark * a delete will still remove the ire from the bucket while we have 258bd670b35SErik Nordmark * dropped the lock and hence the ire_next would be NULL. Thus, we 259bd670b35SErik Nordmark * need a mechanism to prevent deletions from a given bucket. 260bd670b35SErik Nordmark * 261bd670b35SErik Nordmark * To prevent deletions, we bump up the reference count on the 262bd670b35SErik Nordmark * bucket. If the bucket is held, ire_delete just marks both 263bd670b35SErik Nordmark * the ire and irb as CONDEMNED. When the 264bd670b35SErik Nordmark * reference count on the bucket drops to zero, all the CONDEMNED ires 265bd670b35SErik Nordmark * are deleted. We don't have to bump up the reference count on the 266bd670b35SErik Nordmark * bucket if we are walking the bucket and never have to drop the bucket 267bd670b35SErik Nordmark * lock. Note that irb_refhold does not prevent addition of new ires 268bd670b35SErik Nordmark * in the list. It is okay because addition of new ires will not cause 269bd670b35SErik Nordmark * ire_next to point to freed memory. We do irb_refhold only when 270bd670b35SErik Nordmark * all of the 3 conditions are true : 271bd670b35SErik Nordmark * 272bd670b35SErik Nordmark * 1) The code needs to walk the IRE bucket from start to end. 273bd670b35SErik Nordmark * 2) It may have to drop the bucket lock sometimes while doing (1) 274bd670b35SErik Nordmark * 3) It does not want any ires to be deleted meanwhile. 275bd670b35SErik Nordmark */ 276bd670b35SErik Nordmark 277bd670b35SErik Nordmark /* 278bd670b35SErik Nordmark * Bump up the reference count on the hash bucket - IRB to 279bd670b35SErik Nordmark * prevent ires from being deleted in this bucket. 280bd670b35SErik Nordmark */ 281bd670b35SErik Nordmark void 282bd670b35SErik Nordmark irb_refhold(irb_t *irb) 283bd670b35SErik Nordmark { 284bd670b35SErik Nordmark rw_enter(&irb->irb_lock, RW_WRITER); 285bd670b35SErik Nordmark irb->irb_refcnt++; 286bd670b35SErik Nordmark ASSERT(irb->irb_refcnt != 0); 287bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 288bd670b35SErik Nordmark } 289bd670b35SErik Nordmark 290bd670b35SErik Nordmark void 291bd670b35SErik Nordmark irb_refhold_locked(irb_t *irb) 292bd670b35SErik Nordmark { 293bd670b35SErik Nordmark ASSERT(RW_WRITE_HELD(&irb->irb_lock)); 294bd670b35SErik Nordmark irb->irb_refcnt++; 295bd670b35SErik Nordmark ASSERT(irb->irb_refcnt != 0); 296bd670b35SErik Nordmark } 297bd670b35SErik Nordmark 298bd670b35SErik Nordmark /* 299bd670b35SErik Nordmark * Note: when IRB_MARK_DYNAMIC is not set the irb_t 300bd670b35SErik Nordmark * is statically allocated, so that when the irb_refcnt goes to 0, 301bd670b35SErik Nordmark * we simply clean up the ire list and continue. 302bd670b35SErik Nordmark */ 303bd670b35SErik Nordmark void 304bd670b35SErik Nordmark irb_refrele(irb_t *irb) 305bd670b35SErik Nordmark { 306bd670b35SErik Nordmark if (irb->irb_marks & IRB_MARK_DYNAMIC) { 307bd670b35SErik Nordmark irb_refrele_ftable(irb); 308bd670b35SErik Nordmark } else { 309bd670b35SErik Nordmark rw_enter(&irb->irb_lock, RW_WRITER); 310bd670b35SErik Nordmark ASSERT(irb->irb_refcnt != 0); 311bd670b35SErik Nordmark if (--irb->irb_refcnt == 0 && 312bd670b35SErik Nordmark (irb->irb_marks & IRB_MARK_CONDEMNED)) { 313bd670b35SErik Nordmark ire_t *ire_list; 314bd670b35SErik Nordmark 315bd670b35SErik Nordmark ire_list = ire_unlink(irb); 316bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 317bd670b35SErik Nordmark ASSERT(ire_list != NULL); 318bd670b35SErik Nordmark ire_cleanup(ire_list); 319bd670b35SErik Nordmark } else { 320bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 321bd670b35SErik Nordmark } 322bd670b35SErik Nordmark } 323bd670b35SErik Nordmark } 324bd670b35SErik Nordmark 325bd670b35SErik Nordmark 326bd670b35SErik Nordmark /* 327bd670b35SErik Nordmark * Bump up the reference count on the IRE. We cannot assert that the 328bd670b35SErik Nordmark * bucket lock is being held as it is legal to bump up the reference 329bd670b35SErik Nordmark * count after the first lookup has returned the IRE without 330bd670b35SErik Nordmark * holding the lock. 331bd670b35SErik Nordmark */ 332bd670b35SErik Nordmark void 333bd670b35SErik Nordmark ire_refhold(ire_t *ire) 334bd670b35SErik Nordmark { 335bd670b35SErik Nordmark atomic_add_32(&(ire)->ire_refcnt, 1); 336bd670b35SErik Nordmark ASSERT((ire)->ire_refcnt != 0); 337bd670b35SErik Nordmark #ifdef DEBUG 338bd670b35SErik Nordmark ire_trace_ref(ire); 339bd670b35SErik Nordmark #endif 340bd670b35SErik Nordmark } 341bd670b35SErik Nordmark 342bd670b35SErik Nordmark void 343bd670b35SErik Nordmark ire_refhold_notr(ire_t *ire) 344bd670b35SErik Nordmark { 345bd670b35SErik Nordmark atomic_add_32(&(ire)->ire_refcnt, 1); 346bd670b35SErik Nordmark ASSERT((ire)->ire_refcnt != 0); 347bd670b35SErik Nordmark } 348bd670b35SErik Nordmark 349bd670b35SErik Nordmark void 350bd670b35SErik Nordmark ire_refhold_locked(ire_t *ire) 351bd670b35SErik Nordmark { 352bd670b35SErik Nordmark #ifdef DEBUG 353bd670b35SErik Nordmark ire_trace_ref(ire); 354bd670b35SErik Nordmark #endif 355bd670b35SErik Nordmark ire->ire_refcnt++; 356bd670b35SErik Nordmark } 357bd670b35SErik Nordmark 358bd670b35SErik Nordmark /* 359bd670b35SErik Nordmark * Release a ref on an IRE. 3607c478bd9Sstevel@tonic-gate * 3617c478bd9Sstevel@tonic-gate * Must not be called while holding any locks. Otherwise if this is 3627c478bd9Sstevel@tonic-gate * the last reference to be released there is a chance of recursive mutex 3637c478bd9Sstevel@tonic-gate * panic due to ire_refrele -> ipif_ill_refrele_tail -> qwriter_ip trying 3647c478bd9Sstevel@tonic-gate * to restart an ioctl. The one exception is when the caller is sure that 3657c478bd9Sstevel@tonic-gate * this is not the last reference to be released. Eg. if the caller is 3667c478bd9Sstevel@tonic-gate * sure that the ire has not been deleted and won't be deleted. 367bd670b35SErik Nordmark * 368bd670b35SErik Nordmark * In architectures e.g sun4u, where atomic_add_32_nv is just 369bd670b35SErik Nordmark * a cas, we need to maintain the right memory barrier semantics 370bd670b35SErik Nordmark * as that of mutex_exit i.e all the loads and stores should complete 371bd670b35SErik Nordmark * before the cas is executed. membar_exit() does that here. 3727c478bd9Sstevel@tonic-gate */ 3737c478bd9Sstevel@tonic-gate void 3747c478bd9Sstevel@tonic-gate ire_refrele(ire_t *ire) 3757c478bd9Sstevel@tonic-gate { 376bd670b35SErik Nordmark #ifdef DEBUG 377bd670b35SErik Nordmark ire_untrace_ref(ire); 378bd670b35SErik Nordmark #endif 379bd670b35SErik Nordmark ASSERT((ire)->ire_refcnt != 0); 380bd670b35SErik Nordmark membar_exit(); 381bd670b35SErik Nordmark if (atomic_add_32_nv(&(ire)->ire_refcnt, -1) == 0) 382bd670b35SErik Nordmark ire_inactive(ire); 3837c478bd9Sstevel@tonic-gate } 3847c478bd9Sstevel@tonic-gate 3857c478bd9Sstevel@tonic-gate void 3867c478bd9Sstevel@tonic-gate ire_refrele_notr(ire_t *ire) 3877c478bd9Sstevel@tonic-gate { 388bd670b35SErik Nordmark ASSERT((ire)->ire_refcnt != 0); 389bd670b35SErik Nordmark membar_exit(); 390bd670b35SErik Nordmark if (atomic_add_32_nv(&(ire)->ire_refcnt, -1) == 0) 391bd670b35SErik Nordmark ire_inactive(ire); 3927c478bd9Sstevel@tonic-gate } 3937c478bd9Sstevel@tonic-gate 3947c478bd9Sstevel@tonic-gate /* 3957c478bd9Sstevel@tonic-gate * This function is associated with the IP_IOC_IRE_DELETE[_NO_REPLY] 396bd670b35SErik Nordmark * IOCTL[s]. The NO_REPLY form is used by TCP to tell IP that it is 397bd670b35SErik Nordmark * having problems reaching a particular destination. 398bd670b35SErik Nordmark * This will make IP consider alternate routes (e.g., when there are 399bd670b35SErik Nordmark * muliple default routes), and it will also make IP discard any (potentially) 400bd670b35SErik Nordmark * stale redirect. 401bd670b35SErik Nordmark * Management processes may want to use the version that generates a reply. 4027c478bd9Sstevel@tonic-gate * 403bd670b35SErik Nordmark * With the use of NUD like behavior for IPv4/ARP in addition to IPv6 404bd670b35SErik Nordmark * this function shouldn't be necessary for IP to recover from a bad redirect, 405bd670b35SErik Nordmark * a bad default router (when there are multiple default routers), or 406bd670b35SErik Nordmark * a stale ND/ARP entry. But we retain it in any case. 407bd670b35SErik Nordmark * For instance, this is helpful when TCP suspects a failure before NUD does. 4087c478bd9Sstevel@tonic-gate */ 4097c478bd9Sstevel@tonic-gate int 4107c478bd9Sstevel@tonic-gate ip_ire_delete(queue_t *q, mblk_t *mp, cred_t *ioc_cr) 4117c478bd9Sstevel@tonic-gate { 4127c478bd9Sstevel@tonic-gate uchar_t *addr_ucp; 413bd670b35SErik Nordmark uint_t ipversion; 414bd670b35SErik Nordmark sin_t *sin; 415bd670b35SErik Nordmark sin6_t *sin6; 416bd670b35SErik Nordmark ipaddr_t v4addr; 417bd670b35SErik Nordmark in6_addr_t v6addr; 4187c478bd9Sstevel@tonic-gate ire_t *ire; 4197c478bd9Sstevel@tonic-gate ipid_t *ipid; 4207c478bd9Sstevel@tonic-gate zoneid_t zoneid; 421f4b3ec61Sdh155122 ip_stack_t *ipst; 4227c478bd9Sstevel@tonic-gate 4237c478bd9Sstevel@tonic-gate ASSERT(q->q_next == NULL); 424bd670b35SErik Nordmark zoneid = IPCL_ZONEID(Q_TO_CONN(q)); 425f4b3ec61Sdh155122 ipst = CONNQ_TO_IPST(q); 4267c478bd9Sstevel@tonic-gate 4277c478bd9Sstevel@tonic-gate /* 4287c478bd9Sstevel@tonic-gate * Check privilege using the ioctl credential; if it is NULL 4297c478bd9Sstevel@tonic-gate * then this is a kernel message and therefor privileged. 4307c478bd9Sstevel@tonic-gate */ 431f4b3ec61Sdh155122 if (ioc_cr != NULL && secpolicy_ip_config(ioc_cr, B_FALSE) != 0) 4327c478bd9Sstevel@tonic-gate return (EPERM); 4337c478bd9Sstevel@tonic-gate 4347c478bd9Sstevel@tonic-gate ipid = (ipid_t *)mp->b_rptr; 4357c478bd9Sstevel@tonic-gate 4367c478bd9Sstevel@tonic-gate addr_ucp = mi_offset_param(mp, ipid->ipid_addr_offset, 4377c478bd9Sstevel@tonic-gate ipid->ipid_addr_length); 4387c478bd9Sstevel@tonic-gate if (addr_ucp == NULL || !OK_32PTR(addr_ucp)) 4397c478bd9Sstevel@tonic-gate return (EINVAL); 4407c478bd9Sstevel@tonic-gate switch (ipid->ipid_addr_length) { 441bd670b35SErik Nordmark case sizeof (sin_t): 4427c478bd9Sstevel@tonic-gate /* 4437c478bd9Sstevel@tonic-gate * got complete (sockaddr) address - increment addr_ucp to point 4447c478bd9Sstevel@tonic-gate * at the ip_addr field. 4457c478bd9Sstevel@tonic-gate */ 4467c478bd9Sstevel@tonic-gate sin = (sin_t *)addr_ucp; 4477c478bd9Sstevel@tonic-gate addr_ucp = (uchar_t *)&sin->sin_addr.s_addr; 448bd670b35SErik Nordmark ipversion = IPV4_VERSION; 4497c478bd9Sstevel@tonic-gate break; 450bd670b35SErik Nordmark case sizeof (sin6_t): 451bd670b35SErik Nordmark /* 452bd670b35SErik Nordmark * got complete (sockaddr) address - increment addr_ucp to point 453bd670b35SErik Nordmark * at the ip_addr field. 454bd670b35SErik Nordmark */ 455bd670b35SErik Nordmark sin6 = (sin6_t *)addr_ucp; 456bd670b35SErik Nordmark addr_ucp = (uchar_t *)&sin6->sin6_addr; 457bd670b35SErik Nordmark ipversion = IPV6_VERSION; 458bd670b35SErik Nordmark break; 4597c478bd9Sstevel@tonic-gate default: 4607c478bd9Sstevel@tonic-gate return (EINVAL); 4617c478bd9Sstevel@tonic-gate } 462bd670b35SErik Nordmark if (ipversion == IPV4_VERSION) { 4637c478bd9Sstevel@tonic-gate /* Extract the destination address. */ 464bd670b35SErik Nordmark bcopy(addr_ucp, &v4addr, IP_ADDR_LEN); 4657c478bd9Sstevel@tonic-gate 466bd670b35SErik Nordmark ire = ire_ftable_lookup_v4(v4addr, 0, 0, 0, NULL, 467bd670b35SErik Nordmark zoneid, NULL, MATCH_IRE_DSTONLY, 0, ipst, NULL); 468bd670b35SErik Nordmark } else { 469bd670b35SErik Nordmark /* Extract the destination address. */ 470bd670b35SErik Nordmark bcopy(addr_ucp, &v6addr, IPV6_ADDR_LEN); 4717c478bd9Sstevel@tonic-gate 472bd670b35SErik Nordmark ire = ire_ftable_lookup_v6(&v6addr, NULL, NULL, 0, NULL, 473bd670b35SErik Nordmark zoneid, NULL, MATCH_IRE_DSTONLY, 0, ipst, NULL); 4747c478bd9Sstevel@tonic-gate } 4756bdb8e66Sdd193516 if (ire != NULL) { 476bd670b35SErik Nordmark if (ipversion == IPV4_VERSION) { 4777c478bd9Sstevel@tonic-gate ip_rts_change(RTM_LOSING, ire->ire_addr, 4787c478bd9Sstevel@tonic-gate ire->ire_gateway_addr, ire->ire_mask, 479bd670b35SErik Nordmark (Q_TO_CONN(q))->conn_laddr_v4, 0, 0, 0, 480bd670b35SErik Nordmark (RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_IFA), 481bd670b35SErik Nordmark ire->ire_ipst); 4827c478bd9Sstevel@tonic-gate } 483bd670b35SErik Nordmark (void) ire_no_good(ire); 4847c478bd9Sstevel@tonic-gate ire_refrele(ire); 4857c478bd9Sstevel@tonic-gate } 4867c478bd9Sstevel@tonic-gate return (0); 4877c478bd9Sstevel@tonic-gate } 4887c478bd9Sstevel@tonic-gate 4897c478bd9Sstevel@tonic-gate /* 4907c478bd9Sstevel@tonic-gate * Initialize the ire that is specific to IPv4 part and call 4917c478bd9Sstevel@tonic-gate * ire_init_common to finish it. 492bd670b35SErik Nordmark * Returns zero or errno. 4937c478bd9Sstevel@tonic-gate */ 494bd670b35SErik Nordmark int 495bd670b35SErik Nordmark ire_init_v4(ire_t *ire, uchar_t *addr, uchar_t *mask, uchar_t *gateway, 496bd670b35SErik Nordmark ushort_t type, ill_t *ill, zoneid_t zoneid, uint_t flags, 497bd670b35SErik Nordmark tsol_gc_t *gc, ip_stack_t *ipst) 4987c478bd9Sstevel@tonic-gate { 499bd670b35SErik Nordmark int error; 500bd670b35SErik Nordmark 50145916cd2Sjpk /* 50245916cd2Sjpk * Reject IRE security attribute creation/initialization 50345916cd2Sjpk * if system is not running in Trusted mode. 50445916cd2Sjpk */ 505bd670b35SErik Nordmark if (gc != NULL && !is_system_labeled()) 506bd670b35SErik Nordmark return (EINVAL); 50745916cd2Sjpk 508f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_alloced); 5097c478bd9Sstevel@tonic-gate 5107c478bd9Sstevel@tonic-gate if (addr != NULL) 5117c478bd9Sstevel@tonic-gate bcopy(addr, &ire->ire_addr, IP_ADDR_LEN); 512bd670b35SErik Nordmark if (gateway != NULL) 513bd670b35SErik Nordmark bcopy(gateway, &ire->ire_gateway_addr, IP_ADDR_LEN); 514bd670b35SErik Nordmark 515bd670b35SErik Nordmark /* Make sure we don't have stray values in some fields */ 516bd670b35SErik Nordmark switch (type) { 517bd670b35SErik Nordmark case IRE_LOOPBACK: 518bd670b35SErik Nordmark bcopy(&ire->ire_addr, &ire->ire_gateway_addr, IP_ADDR_LEN); 519bd670b35SErik Nordmark /* FALLTHRU */ 520bd670b35SErik Nordmark case IRE_HOST: 521bd670b35SErik Nordmark case IRE_BROADCAST: 522bd670b35SErik Nordmark case IRE_LOCAL: 523bd670b35SErik Nordmark case IRE_IF_CLONE: 524bd670b35SErik Nordmark ire->ire_mask = IP_HOST_MASK; 525bd670b35SErik Nordmark ire->ire_masklen = IPV4_ABITS; 526bd670b35SErik Nordmark break; 527bd670b35SErik Nordmark case IRE_PREFIX: 528bd670b35SErik Nordmark case IRE_DEFAULT: 529bd670b35SErik Nordmark case IRE_IF_RESOLVER: 530bd670b35SErik Nordmark case IRE_IF_NORESOLVER: 5317c478bd9Sstevel@tonic-gate if (mask != NULL) { 5327c478bd9Sstevel@tonic-gate bcopy(mask, &ire->ire_mask, IP_ADDR_LEN); 5337c478bd9Sstevel@tonic-gate ire->ire_masklen = ip_mask_to_plen(ire->ire_mask); 5347c478bd9Sstevel@tonic-gate } 535bd670b35SErik Nordmark break; 536bd670b35SErik Nordmark case IRE_MULTICAST: 537bd670b35SErik Nordmark case IRE_NOROUTE: 538bd670b35SErik Nordmark ASSERT(mask == NULL); 539bd670b35SErik Nordmark break; 540bd670b35SErik Nordmark default: 541bd670b35SErik Nordmark ASSERT(0); 542bd670b35SErik Nordmark return (EINVAL); 5437c478bd9Sstevel@tonic-gate } 5447c478bd9Sstevel@tonic-gate 545bd670b35SErik Nordmark error = ire_init_common(ire, type, ill, zoneid, flags, IPV4_VERSION, 546bd670b35SErik Nordmark gc, ipst); 547bd670b35SErik Nordmark if (error != NULL) 548bd670b35SErik Nordmark return (error); 5497c478bd9Sstevel@tonic-gate 550bd670b35SErik Nordmark /* Determine which function pointers to use */ 551bd670b35SErik Nordmark ire->ire_postfragfn = ip_xmit; /* Common case */ 5527c478bd9Sstevel@tonic-gate 553bd670b35SErik Nordmark switch (ire->ire_type) { 554bd670b35SErik Nordmark case IRE_LOCAL: 555bd670b35SErik Nordmark ire->ire_sendfn = ire_send_local_v4; 556bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_local_v4; 557bd670b35SErik Nordmark ASSERT(ire->ire_ill != NULL); 5581cb875aeSCathy Zhou if (ire->ire_ill->ill_flags & ILLF_NOACCEPT) 559bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_noaccept_v6; 560bd670b35SErik Nordmark break; 561bd670b35SErik Nordmark case IRE_LOOPBACK: 562bd670b35SErik Nordmark ire->ire_sendfn = ire_send_local_v4; 563bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_loopback_v4; 564bd670b35SErik Nordmark break; 565bd670b35SErik Nordmark case IRE_BROADCAST: 566bd670b35SErik Nordmark ire->ire_postfragfn = ip_postfrag_loopcheck; 567bd670b35SErik Nordmark ire->ire_sendfn = ire_send_broadcast_v4; 568bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_broadcast_v4; 569bd670b35SErik Nordmark break; 570bd670b35SErik Nordmark case IRE_MULTICAST: 571bd670b35SErik Nordmark ire->ire_postfragfn = ip_postfrag_loopcheck; 572bd670b35SErik Nordmark ire->ire_sendfn = ire_send_multicast_v4; 573bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_multicast_v4; 574bd670b35SErik Nordmark break; 575bd670b35SErik Nordmark default: 576bd670b35SErik Nordmark /* 577bd670b35SErik Nordmark * For IRE_IF_ALL and IRE_OFFLINK we forward received 578bd670b35SErik Nordmark * packets by default. 579bd670b35SErik Nordmark */ 580bd670b35SErik Nordmark ire->ire_sendfn = ire_send_wire_v4; 581bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_forward_v4; 582bd670b35SErik Nordmark break; 583bd670b35SErik Nordmark } 584bd670b35SErik Nordmark if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) { 585bd670b35SErik Nordmark ire->ire_sendfn = ire_send_noroute_v4; 586bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_noroute_v4; 587bd670b35SErik Nordmark } else if (ire->ire_flags & RTF_MULTIRT) { 588bd670b35SErik Nordmark ire->ire_postfragfn = ip_postfrag_multirt_v4; 589bd670b35SErik Nordmark ire->ire_sendfn = ire_send_multirt_v4; 590bd670b35SErik Nordmark /* Multirt receive of broadcast uses ire_recv_broadcast_v4 */ 591bd670b35SErik Nordmark if (ire->ire_type != IRE_BROADCAST) 592bd670b35SErik Nordmark ire->ire_recvfn = ire_recv_multirt_v4; 593bd670b35SErik Nordmark } 594bd670b35SErik Nordmark ire->ire_nce_capable = ire_determine_nce_capable(ire); 595bd670b35SErik Nordmark return (0); 5967c478bd9Sstevel@tonic-gate } 5977c478bd9Sstevel@tonic-gate 5987c478bd9Sstevel@tonic-gate /* 599bd670b35SErik Nordmark * Determine ire_nce_capable 6007c478bd9Sstevel@tonic-gate */ 601bd670b35SErik Nordmark boolean_t 602bd670b35SErik Nordmark ire_determine_nce_capable(ire_t *ire) 6037c478bd9Sstevel@tonic-gate { 604bd670b35SErik Nordmark int max_masklen; 6057c478bd9Sstevel@tonic-gate 606bd670b35SErik Nordmark if ((ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) || 607bd670b35SErik Nordmark (ire->ire_type & IRE_MULTICAST)) 608bd670b35SErik Nordmark return (B_TRUE); 6097c478bd9Sstevel@tonic-gate 610bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) 611bd670b35SErik Nordmark max_masklen = IPV4_ABITS; 612bd670b35SErik Nordmark else 613bd670b35SErik Nordmark max_masklen = IPV6_ABITS; 6147c478bd9Sstevel@tonic-gate 615bd670b35SErik Nordmark if ((ire->ire_type & IRE_ONLINK) && ire->ire_masklen == max_masklen) 616bd670b35SErik Nordmark return (B_TRUE); 617bd670b35SErik Nordmark return (B_FALSE); 6187c478bd9Sstevel@tonic-gate } 6197c478bd9Sstevel@tonic-gate 6207c478bd9Sstevel@tonic-gate /* 6217c478bd9Sstevel@tonic-gate * ire_create is called to allocate and initialize a new IRE. 6227c478bd9Sstevel@tonic-gate * 6237c478bd9Sstevel@tonic-gate * NOTE : This is called as writer sometimes though not required 6247c478bd9Sstevel@tonic-gate * by this function. 6257c478bd9Sstevel@tonic-gate */ 6267c478bd9Sstevel@tonic-gate ire_t * 627bd670b35SErik Nordmark ire_create(uchar_t *addr, uchar_t *mask, uchar_t *gateway, 628bd670b35SErik Nordmark ushort_t type, ill_t *ill, zoneid_t zoneid, uint_t flags, tsol_gc_t *gc, 629bd670b35SErik Nordmark ip_stack_t *ipst) 6307c478bd9Sstevel@tonic-gate { 6317c478bd9Sstevel@tonic-gate ire_t *ire; 632bd670b35SErik Nordmark int error; 6337c478bd9Sstevel@tonic-gate 6347c478bd9Sstevel@tonic-gate ire = kmem_cache_alloc(ire_cache, KM_NOSLEEP); 6357c478bd9Sstevel@tonic-gate if (ire == NULL) { 636bd670b35SErik Nordmark DTRACE_PROBE(kmem__cache__alloc); 6377c478bd9Sstevel@tonic-gate return (NULL); 6387c478bd9Sstevel@tonic-gate } 6397c478bd9Sstevel@tonic-gate *ire = ire_null; 6407c478bd9Sstevel@tonic-gate 641bd670b35SErik Nordmark error = ire_init_v4(ire, addr, mask, gateway, type, ill, zoneid, flags, 642bd670b35SErik Nordmark gc, ipst); 643bd670b35SErik Nordmark if (error != 0) { 644bd670b35SErik Nordmark DTRACE_PROBE2(ire__init, ire_t *, ire, int, error); 6457c478bd9Sstevel@tonic-gate kmem_cache_free(ire_cache, ire); 6467c478bd9Sstevel@tonic-gate return (NULL); 6477c478bd9Sstevel@tonic-gate } 6487c478bd9Sstevel@tonic-gate return (ire); 6497c478bd9Sstevel@tonic-gate } 6507c478bd9Sstevel@tonic-gate 6517c478bd9Sstevel@tonic-gate /* 6527c478bd9Sstevel@tonic-gate * Common to IPv4 and IPv6 653bd670b35SErik Nordmark * Returns zero or errno. 6547c478bd9Sstevel@tonic-gate */ 655bd670b35SErik Nordmark int 656bd670b35SErik Nordmark ire_init_common(ire_t *ire, ushort_t type, ill_t *ill, zoneid_t zoneid, 657bd670b35SErik Nordmark uint_t flags, uchar_t ipversion, tsol_gc_t *gc, ip_stack_t *ipst) 6587c478bd9Sstevel@tonic-gate { 659bd670b35SErik Nordmark int error; 6607c478bd9Sstevel@tonic-gate 66145916cd2Sjpk #ifdef DEBUG 662bd670b35SErik Nordmark if (ill != NULL) { 663bd670b35SErik Nordmark if (ill->ill_isv6) 6647c478bd9Sstevel@tonic-gate ASSERT(ipversion == IPV6_VERSION); 6657c478bd9Sstevel@tonic-gate else 6667c478bd9Sstevel@tonic-gate ASSERT(ipversion == IPV4_VERSION); 6677c478bd9Sstevel@tonic-gate } 66845916cd2Sjpk #endif /* DEBUG */ 66945916cd2Sjpk 67045916cd2Sjpk /* 67145916cd2Sjpk * Create/initialize IRE security attribute only in Trusted mode; 672bd670b35SErik Nordmark * if the passed in gc is non-NULL, we expect that the caller 67345916cd2Sjpk * has held a reference to it and will release it when this routine 67445916cd2Sjpk * returns a failure, otherwise we own the reference. We do this 67545916cd2Sjpk * prior to initializing the rest IRE fields. 67645916cd2Sjpk */ 67745916cd2Sjpk if (is_system_labeled()) { 67845916cd2Sjpk if ((type & (IRE_LOCAL | IRE_LOOPBACK | IRE_BROADCAST | 679bd670b35SErik Nordmark IRE_IF_ALL | IRE_MULTICAST | IRE_NOROUTE)) != 0) { 68045916cd2Sjpk /* release references on behalf of caller */ 68145916cd2Sjpk if (gc != NULL) 68245916cd2Sjpk GC_REFRELE(gc); 683bd670b35SErik Nordmark } else { 684bd670b35SErik Nordmark error = tsol_ire_init_gwattr(ire, ipversion, gc); 685bd670b35SErik Nordmark if (error != 0) 686bd670b35SErik Nordmark return (error); 68745916cd2Sjpk } 68845916cd2Sjpk } 6897c478bd9Sstevel@tonic-gate 6907c478bd9Sstevel@tonic-gate ire->ire_type = type; 6917c478bd9Sstevel@tonic-gate ire->ire_flags = RTF_UP | flags; 6927c478bd9Sstevel@tonic-gate ire->ire_create_time = (uint32_t)gethrestime_sec(); 693bd670b35SErik Nordmark ire->ire_generation = IRE_GENERATION_INITIAL; 6947c478bd9Sstevel@tonic-gate 6957c478bd9Sstevel@tonic-gate /* 696bd670b35SErik Nordmark * The ill_ire_cnt isn't increased until 697bd670b35SErik Nordmark * the IRE is added to ensure that a walker will find 698bd670b35SErik Nordmark * all IREs that hold a reference on an ill. 6997c478bd9Sstevel@tonic-gate * 700bd670b35SErik Nordmark * Note that ill_ire_multicast doesn't hold a ref on the ill since 701bd670b35SErik Nordmark * ire_add() is not called for the IRE_MULTICAST. 7027c478bd9Sstevel@tonic-gate */ 703bd670b35SErik Nordmark ire->ire_ill = ill; 704bd670b35SErik Nordmark ire->ire_zoneid = zoneid; 7057c478bd9Sstevel@tonic-gate ire->ire_ipversion = ipversion; 706bd670b35SErik Nordmark 7077c478bd9Sstevel@tonic-gate mutex_init(&ire->ire_lock, NULL, MUTEX_DEFAULT, NULL); 708c793af95Ssangeeta ire->ire_refcnt = 1; 709bd670b35SErik Nordmark ire->ire_identical_ref = 1; /* Number of ire_delete's needed */ 710f4b3ec61Sdh155122 ire->ire_ipst = ipst; /* No netstack_hold */ 7116a8288c7Scarlsonj ire->ire_trace_disable = B_FALSE; 71245916cd2Sjpk 713bd670b35SErik Nordmark return (0); 7147c478bd9Sstevel@tonic-gate } 7157c478bd9Sstevel@tonic-gate 7167c478bd9Sstevel@tonic-gate /* 717bd670b35SErik Nordmark * This creates an IRE_BROADCAST based on the arguments. 718bd670b35SErik Nordmark * A mirror is ire_lookup_bcast(). 7197c478bd9Sstevel@tonic-gate * 720bd670b35SErik Nordmark * Any supression of unneeded ones is done in ire_add_v4. 721bd670b35SErik Nordmark * We add one IRE_BROADCAST per address. ire_send_broadcast_v4() 722bd670b35SErik Nordmark * takes care of generating a loopback copy of the packet. 7237c478bd9Sstevel@tonic-gate */ 7247c478bd9Sstevel@tonic-gate ire_t ** 725bd670b35SErik Nordmark ire_create_bcast(ill_t *ill, ipaddr_t addr, zoneid_t zoneid, ire_t **irep) 7267c478bd9Sstevel@tonic-gate { 727e11c3f44Smeem ip_stack_t *ipst = ill->ill_ipst; 7287c478bd9Sstevel@tonic-gate 729bd670b35SErik Nordmark ASSERT(IAM_WRITER_ILL(ill)); 730f4b3ec61Sdh155122 7317c478bd9Sstevel@tonic-gate *irep++ = ire_create( 7327c478bd9Sstevel@tonic-gate (uchar_t *)&addr, /* dest addr */ 7337c478bd9Sstevel@tonic-gate (uchar_t *)&ip_g_all_ones, /* mask */ 7347c478bd9Sstevel@tonic-gate NULL, /* no gateway */ 7357c478bd9Sstevel@tonic-gate IRE_BROADCAST, 736bd670b35SErik Nordmark ill, 737bd670b35SErik Nordmark zoneid, 738bd670b35SErik Nordmark RTF_KERNEL, 739f4b3ec61Sdh155122 NULL, 740f4b3ec61Sdh155122 ipst); 7417c478bd9Sstevel@tonic-gate 7427c478bd9Sstevel@tonic-gate return (irep); 7437c478bd9Sstevel@tonic-gate } 7447c478bd9Sstevel@tonic-gate 7457c478bd9Sstevel@tonic-gate /* 746bd670b35SErik Nordmark * This looks up an IRE_BROADCAST based on the arguments. 747bd670b35SErik Nordmark * Mirrors ire_create_bcast(). 7487c478bd9Sstevel@tonic-gate */ 7497c478bd9Sstevel@tonic-gate ire_t * 750bd670b35SErik Nordmark ire_lookup_bcast(ill_t *ill, ipaddr_t addr, zoneid_t zoneid) 7517c478bd9Sstevel@tonic-gate { 7527c478bd9Sstevel@tonic-gate ire_t *ire; 753bd670b35SErik Nordmark int match_args; 7547c478bd9Sstevel@tonic-gate 755bd670b35SErik Nordmark match_args = MATCH_IRE_TYPE | MATCH_IRE_ILL | MATCH_IRE_GW | 756bd670b35SErik Nordmark MATCH_IRE_MASK | MATCH_IRE_ZONEONLY; 757bd670b35SErik Nordmark 758bd670b35SErik Nordmark if (IS_UNDER_IPMP(ill)) 759bd670b35SErik Nordmark match_args |= MATCH_IRE_TESTHIDDEN; 760bd670b35SErik Nordmark 761bd670b35SErik Nordmark ire = ire_ftable_lookup_v4( 762bd670b35SErik Nordmark addr, /* dest addr */ 763bd670b35SErik Nordmark ip_g_all_ones, /* mask */ 764bd670b35SErik Nordmark 0, /* no gateway */ 765bd670b35SErik Nordmark IRE_BROADCAST, 766bd670b35SErik Nordmark ill, 767bd670b35SErik Nordmark zoneid, 768bd670b35SErik Nordmark NULL, 769bd670b35SErik Nordmark match_args, 770bd670b35SErik Nordmark 0, 771bd670b35SErik Nordmark ill->ill_ipst, 772bd670b35SErik Nordmark NULL); 7737c478bd9Sstevel@tonic-gate return (ire); 7747c478bd9Sstevel@tonic-gate } 7757c478bd9Sstevel@tonic-gate 7767c478bd9Sstevel@tonic-gate /* Arrange to call the specified function for every IRE in the world. */ 7777c478bd9Sstevel@tonic-gate void 778f4b3ec61Sdh155122 ire_walk(pfv_t func, void *arg, ip_stack_t *ipst) 7797c478bd9Sstevel@tonic-gate { 780f4b3ec61Sdh155122 ire_walk_ipvers(func, arg, 0, ALL_ZONES, ipst); 7817c478bd9Sstevel@tonic-gate } 7827c478bd9Sstevel@tonic-gate 7837c478bd9Sstevel@tonic-gate void 784f4b3ec61Sdh155122 ire_walk_v4(pfv_t func, void *arg, zoneid_t zoneid, ip_stack_t *ipst) 7857c478bd9Sstevel@tonic-gate { 786f4b3ec61Sdh155122 ire_walk_ipvers(func, arg, IPV4_VERSION, zoneid, ipst); 7877c478bd9Sstevel@tonic-gate } 7887c478bd9Sstevel@tonic-gate 7897c478bd9Sstevel@tonic-gate void 790f4b3ec61Sdh155122 ire_walk_v6(pfv_t func, void *arg, zoneid_t zoneid, ip_stack_t *ipst) 7917c478bd9Sstevel@tonic-gate { 792f4b3ec61Sdh155122 ire_walk_ipvers(func, arg, IPV6_VERSION, zoneid, ipst); 7937c478bd9Sstevel@tonic-gate } 7947c478bd9Sstevel@tonic-gate 7957c478bd9Sstevel@tonic-gate /* 7967c478bd9Sstevel@tonic-gate * Walk a particular version. version == 0 means both v4 and v6. 7977c478bd9Sstevel@tonic-gate */ 7987c478bd9Sstevel@tonic-gate static void 799f4b3ec61Sdh155122 ire_walk_ipvers(pfv_t func, void *arg, uchar_t vers, zoneid_t zoneid, 800f4b3ec61Sdh155122 ip_stack_t *ipst) 8017c478bd9Sstevel@tonic-gate { 8027c478bd9Sstevel@tonic-gate if (vers != IPV6_VERSION) { 803c793af95Ssangeeta /* 804c793af95Ssangeeta * ip_forwarding_table variable doesn't matter for IPv4 since 805f4b3ec61Sdh155122 * ire_walk_ill_tables uses ips_ip_ftable for IPv4. 806c793af95Ssangeeta */ 8077c478bd9Sstevel@tonic-gate ire_walk_ill_tables(0, 0, func, arg, IP_MASK_TABLE_SIZE, 808c793af95Ssangeeta 0, NULL, 809f4b3ec61Sdh155122 NULL, zoneid, ipst); 8107c478bd9Sstevel@tonic-gate } 8117c478bd9Sstevel@tonic-gate if (vers != IPV4_VERSION) { 8127c478bd9Sstevel@tonic-gate ire_walk_ill_tables(0, 0, func, arg, IP6_MASK_TABLE_SIZE, 813f4b3ec61Sdh155122 ipst->ips_ip6_ftable_hash_size, 814f4b3ec61Sdh155122 ipst->ips_ip_forwarding_table_v6, 815bd670b35SErik Nordmark NULL, zoneid, ipst); 8167c478bd9Sstevel@tonic-gate } 8177c478bd9Sstevel@tonic-gate } 8187c478bd9Sstevel@tonic-gate 8197c478bd9Sstevel@tonic-gate /* 8207924222fSmeem * Arrange to call the specified function for every IRE that matches the ill. 8217c478bd9Sstevel@tonic-gate */ 8227c478bd9Sstevel@tonic-gate void 82345916cd2Sjpk ire_walk_ill(uint_t match_flags, uint_t ire_type, pfv_t func, void *arg, 8247c478bd9Sstevel@tonic-gate ill_t *ill) 8257c478bd9Sstevel@tonic-gate { 8267924222fSmeem uchar_t vers = (ill->ill_isv6 ? IPV6_VERSION : IPV4_VERSION); 8277924222fSmeem 8287924222fSmeem ire_walk_ill_ipvers(match_flags, ire_type, func, arg, vers, ill); 8297c478bd9Sstevel@tonic-gate } 8307c478bd9Sstevel@tonic-gate 8317c478bd9Sstevel@tonic-gate /* 8327924222fSmeem * Walk a particular ill and version. 8337c478bd9Sstevel@tonic-gate */ 8347c478bd9Sstevel@tonic-gate static void 8357c478bd9Sstevel@tonic-gate ire_walk_ill_ipvers(uint_t match_flags, uint_t ire_type, pfv_t func, 83645916cd2Sjpk void *arg, uchar_t vers, ill_t *ill) 8377c478bd9Sstevel@tonic-gate { 838f4b3ec61Sdh155122 ip_stack_t *ipst = ill->ill_ipst; 839f4b3ec61Sdh155122 8407924222fSmeem if (vers == IPV4_VERSION) { 8417c478bd9Sstevel@tonic-gate ire_walk_ill_tables(match_flags, ire_type, func, arg, 842bd670b35SErik Nordmark IP_MASK_TABLE_SIZE, 843bd670b35SErik Nordmark 0, NULL, 844bd670b35SErik Nordmark ill, ALL_ZONES, ipst); 845bd670b35SErik Nordmark } 846bd670b35SErik Nordmark if (vers != IPV4_VERSION) { 8477c478bd9Sstevel@tonic-gate ire_walk_ill_tables(match_flags, ire_type, func, arg, 848f4b3ec61Sdh155122 IP6_MASK_TABLE_SIZE, ipst->ips_ip6_ftable_hash_size, 849f4b3ec61Sdh155122 ipst->ips_ip_forwarding_table_v6, 850bd670b35SErik Nordmark ill, ALL_ZONES, ipst); 8517c478bd9Sstevel@tonic-gate } 8527c478bd9Sstevel@tonic-gate } 8537c478bd9Sstevel@tonic-gate 854bd670b35SErik Nordmark /* 855bd670b35SErik Nordmark * Do the specific matching of IREs to shared-IP zones. 856bd670b35SErik Nordmark * 857bd670b35SErik Nordmark * We have the same logic as in ire_match_args but implemented slightly 858bd670b35SErik Nordmark * differently. 859bd670b35SErik Nordmark */ 860c793af95Ssangeeta boolean_t 8617c478bd9Sstevel@tonic-gate ire_walk_ill_match(uint_t match_flags, uint_t ire_type, ire_t *ire, 862f4b3ec61Sdh155122 ill_t *ill, zoneid_t zoneid, ip_stack_t *ipst) 8637c478bd9Sstevel@tonic-gate { 864*188e1664SErik Nordmark ill_t *dst_ill = ire->ire_ill; 8657c478bd9Sstevel@tonic-gate 8667c478bd9Sstevel@tonic-gate ASSERT(match_flags != 0 || zoneid != ALL_ZONES); 8677c478bd9Sstevel@tonic-gate 868bd670b35SErik Nordmark if (zoneid != ALL_ZONES && zoneid != ire->ire_zoneid && 869bd670b35SErik Nordmark ire->ire_zoneid != ALL_ZONES) { 8707c478bd9Sstevel@tonic-gate /* 8717c478bd9Sstevel@tonic-gate * We're walking the IREs for a specific zone. The only relevant 8727c478bd9Sstevel@tonic-gate * IREs are: 8737c478bd9Sstevel@tonic-gate * - all IREs with a matching ire_zoneid 874bd670b35SErik Nordmark * - IRE_IF_ALL IREs for interfaces with a usable source addr 8757c478bd9Sstevel@tonic-gate * with a matching zone 876bd670b35SErik Nordmark * - IRE_OFFLINK with a gateway reachable from the zone 877bd670b35SErik Nordmark * Note that ealier we only did the IRE_OFFLINK check for 878bd670b35SErik Nordmark * IRE_DEFAULT (and only when we had multiple IRE_DEFAULTs). 8797c478bd9Sstevel@tonic-gate */ 880bd670b35SErik Nordmark if (ire->ire_type & IRE_ONLINK) { 881bd670b35SErik Nordmark uint_t ifindex; 882bd670b35SErik Nordmark 8837c478bd9Sstevel@tonic-gate /* 884bd670b35SErik Nordmark * Note there is no IRE_INTERFACE on vniN thus 885bd670b35SErik Nordmark * can't do an IRE lookup for a matching route. 8867c478bd9Sstevel@tonic-gate */ 887bd670b35SErik Nordmark ifindex = dst_ill->ill_usesrc_ifindex; 888bd670b35SErik Nordmark if (ifindex == 0) 8897c478bd9Sstevel@tonic-gate return (B_FALSE); 890bd670b35SErik Nordmark 8917c478bd9Sstevel@tonic-gate /* 892bd670b35SErik Nordmark * If there is a usable source address in the 893bd670b35SErik Nordmark * zone, then it's ok to return an 894bd670b35SErik Nordmark * IRE_INTERFACE 8957c478bd9Sstevel@tonic-gate */ 896bd670b35SErik Nordmark if (!ipif_zone_avail(ifindex, dst_ill->ill_isv6, 897bd670b35SErik Nordmark zoneid, ipst)) { 8987c478bd9Sstevel@tonic-gate return (B_FALSE); 8997c478bd9Sstevel@tonic-gate } 9007c478bd9Sstevel@tonic-gate } 901bd670b35SErik Nordmark if (dst_ill != NULL && (ire->ire_type & IRE_OFFLINK)) { 902bd670b35SErik Nordmark ipif_t *tipif; 903bd670b35SErik Nordmark 904bd670b35SErik Nordmark mutex_enter(&dst_ill->ill_lock); 905bd670b35SErik Nordmark for (tipif = dst_ill->ill_ipif; 906bd670b35SErik Nordmark tipif != NULL; tipif = tipif->ipif_next) { 907bd670b35SErik Nordmark if (!IPIF_IS_CONDEMNED(tipif) && 908bd670b35SErik Nordmark (tipif->ipif_flags & IPIF_UP) && 909bd670b35SErik Nordmark (tipif->ipif_zoneid == zoneid || 910bd670b35SErik Nordmark tipif->ipif_zoneid == ALL_ZONES)) 911bd670b35SErik Nordmark break; 912bd670b35SErik Nordmark } 913bd670b35SErik Nordmark mutex_exit(&dst_ill->ill_lock); 914bd670b35SErik Nordmark if (tipif == NULL) { 9157c478bd9Sstevel@tonic-gate return (B_FALSE); 9167c478bd9Sstevel@tonic-gate } 9177c478bd9Sstevel@tonic-gate } 918*188e1664SErik Nordmark } 9197c478bd9Sstevel@tonic-gate /* 920*188e1664SErik Nordmark * Except for ALL_ZONES, we only match the offlink routes 921bd670b35SErik Nordmark * where ire_gateway_addr has an IRE_INTERFACE for the zoneid. 9227c478bd9Sstevel@tonic-gate */ 923*188e1664SErik Nordmark if ((ire->ire_type & IRE_OFFLINK) && zoneid != ALL_ZONES) { 9247c478bd9Sstevel@tonic-gate in6_addr_t gw_addr_v6; 925e11c3f44Smeem 9267c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 927*188e1664SErik Nordmark if (!ire_gateway_ok_zone_v4(ire->ire_gateway_addr, 928*188e1664SErik Nordmark zoneid, dst_ill, NULL, ipst, B_FALSE)) 929bd670b35SErik Nordmark return (B_FALSE); 9307c478bd9Sstevel@tonic-gate } else { 9317c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV6_VERSION); 9327c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 9337c478bd9Sstevel@tonic-gate gw_addr_v6 = ire->ire_gateway_addr_v6; 9347c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 935bd670b35SErik Nordmark 936bd670b35SErik Nordmark if (!ire_gateway_ok_zone_v6(&gw_addr_v6, zoneid, 937bd670b35SErik Nordmark dst_ill, NULL, ipst, B_FALSE)) 9387c478bd9Sstevel@tonic-gate return (B_FALSE); 9397c478bd9Sstevel@tonic-gate } 9407c478bd9Sstevel@tonic-gate } 9417c478bd9Sstevel@tonic-gate 9427c478bd9Sstevel@tonic-gate if (((!(match_flags & MATCH_IRE_TYPE)) || 9437c478bd9Sstevel@tonic-gate (ire->ire_type & ire_type)) && 9447c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_ILL)) || 945bd670b35SErik Nordmark (dst_ill == ill || 946bd670b35SErik Nordmark dst_ill != NULL && IS_IN_SAME_ILLGRP(dst_ill, ill)))) { 9477c478bd9Sstevel@tonic-gate return (B_TRUE); 9487c478bd9Sstevel@tonic-gate } 9497c478bd9Sstevel@tonic-gate return (B_FALSE); 9507c478bd9Sstevel@tonic-gate } 9517c478bd9Sstevel@tonic-gate 952c793af95Ssangeeta int 953c793af95Ssangeeta rtfunc(struct radix_node *rn, void *arg) 954c793af95Ssangeeta { 955c793af95Ssangeeta struct rtfuncarg *rtf = arg; 956c793af95Ssangeeta struct rt_entry *rt; 957c793af95Ssangeeta irb_t *irb; 958c793af95Ssangeeta ire_t *ire; 959c793af95Ssangeeta boolean_t ret; 960c793af95Ssangeeta 961c793af95Ssangeeta rt = (struct rt_entry *)rn; 962c793af95Ssangeeta ASSERT(rt != NULL); 963c793af95Ssangeeta irb = &rt->rt_irb; 964c793af95Ssangeeta for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 965c793af95Ssangeeta if ((rtf->rt_match_flags != 0) || 966c793af95Ssangeeta (rtf->rt_zoneid != ALL_ZONES)) { 967c793af95Ssangeeta ret = ire_walk_ill_match(rtf->rt_match_flags, 968c793af95Ssangeeta rtf->rt_ire_type, ire, 969f4b3ec61Sdh155122 rtf->rt_ill, rtf->rt_zoneid, rtf->rt_ipst); 970bd670b35SErik Nordmark } else { 971c793af95Ssangeeta ret = B_TRUE; 972bd670b35SErik Nordmark } 973c793af95Ssangeeta if (ret) 974c793af95Ssangeeta (*rtf->rt_func)(ire, rtf->rt_arg); 975c793af95Ssangeeta } 976c793af95Ssangeeta return (0); 977c793af95Ssangeeta } 978c793af95Ssangeeta 9797c478bd9Sstevel@tonic-gate /* 980bd670b35SErik Nordmark * Walk the ftable entries that match the ill. 9817c478bd9Sstevel@tonic-gate */ 982c793af95Ssangeeta void 9837c478bd9Sstevel@tonic-gate ire_walk_ill_tables(uint_t match_flags, uint_t ire_type, pfv_t func, 98445916cd2Sjpk void *arg, size_t ftbl_sz, size_t htbl_sz, irb_t **ipftbl, 985bd670b35SErik Nordmark ill_t *ill, zoneid_t zoneid, 986f4b3ec61Sdh155122 ip_stack_t *ipst) 9877c478bd9Sstevel@tonic-gate { 9887c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 9897c478bd9Sstevel@tonic-gate irb_t *irb; 9907c478bd9Sstevel@tonic-gate ire_t *ire; 9917c478bd9Sstevel@tonic-gate int i, j; 9927c478bd9Sstevel@tonic-gate boolean_t ret; 993c793af95Ssangeeta struct rtfuncarg rtfarg; 9947c478bd9Sstevel@tonic-gate 995e11c3f44Smeem ASSERT((!(match_flags & MATCH_IRE_ILL)) || (ill != NULL)); 9967c478bd9Sstevel@tonic-gate ASSERT(!(match_flags & MATCH_IRE_TYPE) || (ire_type != 0)); 997bd670b35SErik Nordmark 998c793af95Ssangeeta /* knobs such that routine is called only for v6 case */ 999f4b3ec61Sdh155122 if (ipftbl == ipst->ips_ip_forwarding_table_v6) { 10007c478bd9Sstevel@tonic-gate for (i = (ftbl_sz - 1); i >= 0; i--) { 10017c478bd9Sstevel@tonic-gate if ((irb_ptr = ipftbl[i]) == NULL) 10027c478bd9Sstevel@tonic-gate continue; 10037c478bd9Sstevel@tonic-gate for (j = 0; j < htbl_sz; j++) { 10047c478bd9Sstevel@tonic-gate irb = &irb_ptr[j]; 10057c478bd9Sstevel@tonic-gate if (irb->irb_ire == NULL) 10067c478bd9Sstevel@tonic-gate continue; 1007c793af95Ssangeeta 1008bd670b35SErik Nordmark irb_refhold(irb); 10097c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; 10107c478bd9Sstevel@tonic-gate ire = ire->ire_next) { 10117c478bd9Sstevel@tonic-gate if (match_flags == 0 && 10127c478bd9Sstevel@tonic-gate zoneid == ALL_ZONES) { 10137c478bd9Sstevel@tonic-gate ret = B_TRUE; 10147c478bd9Sstevel@tonic-gate } else { 1015c793af95Ssangeeta ret = 1016c793af95Ssangeeta ire_walk_ill_match( 1017c793af95Ssangeeta match_flags, 1018c793af95Ssangeeta ire_type, ire, ill, 1019f4b3ec61Sdh155122 zoneid, ipst); 10207c478bd9Sstevel@tonic-gate } 10217c478bd9Sstevel@tonic-gate if (ret) 10227c478bd9Sstevel@tonic-gate (*func)(ire, arg); 10237c478bd9Sstevel@tonic-gate } 1024bd670b35SErik Nordmark irb_refrele(irb); 10257c478bd9Sstevel@tonic-gate } 10267c478bd9Sstevel@tonic-gate } 1027c793af95Ssangeeta } else { 1028*188e1664SErik Nordmark bzero(&rtfarg, sizeof (rtfarg)); 1029c793af95Ssangeeta rtfarg.rt_func = func; 1030c793af95Ssangeeta rtfarg.rt_arg = arg; 1031c793af95Ssangeeta if (match_flags != 0) { 1032c793af95Ssangeeta rtfarg.rt_match_flags = match_flags; 1033c793af95Ssangeeta } 1034c793af95Ssangeeta rtfarg.rt_ire_type = ire_type; 1035c793af95Ssangeeta rtfarg.rt_ill = ill; 1036c793af95Ssangeeta rtfarg.rt_zoneid = zoneid; 1037f4b3ec61Sdh155122 rtfarg.rt_ipst = ipst; /* No netstack_hold */ 1038f4b3ec61Sdh155122 (void) ipst->ips_ip_ftable->rnh_walktree_mt( 1039f4b3ec61Sdh155122 ipst->ips_ip_ftable, 1040f4b3ec61Sdh155122 rtfunc, &rtfarg, irb_refhold_rn, irb_refrele_rn); 1041c793af95Ssangeeta } 10427c478bd9Sstevel@tonic-gate } 10437c478bd9Sstevel@tonic-gate 10447c478bd9Sstevel@tonic-gate /* 10457c478bd9Sstevel@tonic-gate * This function takes a mask and returns 10467c478bd9Sstevel@tonic-gate * number of bits set in the mask. If no 10477c478bd9Sstevel@tonic-gate * bit is set it returns 0. 10487c478bd9Sstevel@tonic-gate * Assumes a contiguous mask. 10497c478bd9Sstevel@tonic-gate */ 10507c478bd9Sstevel@tonic-gate int 10517c478bd9Sstevel@tonic-gate ip_mask_to_plen(ipaddr_t mask) 10527c478bd9Sstevel@tonic-gate { 10537c478bd9Sstevel@tonic-gate return (mask == 0 ? 0 : IP_ABITS - (ffs(ntohl(mask)) -1)); 10547c478bd9Sstevel@tonic-gate } 10557c478bd9Sstevel@tonic-gate 10567c478bd9Sstevel@tonic-gate /* 10577c478bd9Sstevel@tonic-gate * Convert length for a mask to the mask. 10587c478bd9Sstevel@tonic-gate */ 10597c478bd9Sstevel@tonic-gate ipaddr_t 10607c478bd9Sstevel@tonic-gate ip_plen_to_mask(uint_t masklen) 10617c478bd9Sstevel@tonic-gate { 1062bd670b35SErik Nordmark if (masklen == 0) 1063bd670b35SErik Nordmark return (0); 1064bd670b35SErik Nordmark 10657c478bd9Sstevel@tonic-gate return (htonl(IP_HOST_MASK << (IP_ABITS - masklen))); 10667c478bd9Sstevel@tonic-gate } 10677c478bd9Sstevel@tonic-gate 10687c478bd9Sstevel@tonic-gate void 10697c478bd9Sstevel@tonic-gate ire_atomic_end(irb_t *irb_ptr, ire_t *ire) 10707c478bd9Sstevel@tonic-gate { 10717c478bd9Sstevel@tonic-gate ill_t *ill; 10727c478bd9Sstevel@tonic-gate 1073bd670b35SErik Nordmark ill = ire->ire_ill; 1074bd670b35SErik Nordmark if (ill != NULL) 1075bd670b35SErik Nordmark mutex_exit(&ill->ill_lock); 1076bd670b35SErik Nordmark rw_exit(&irb_ptr->irb_lock); 10777c478bd9Sstevel@tonic-gate } 10787c478bd9Sstevel@tonic-gate 1079bd670b35SErik Nordmark /* 1080bd670b35SErik Nordmark * ire_add_v[46] atomically make sure that the ill associated 1081bd670b35SErik Nordmark * with the new ire is not going away i.e., we check ILL_CONDEMNED. 1082bd670b35SErik Nordmark */ 1083bd670b35SErik Nordmark int 1084bd670b35SErik Nordmark ire_atomic_start(irb_t *irb_ptr, ire_t *ire) 1085bd670b35SErik Nordmark { 1086bd670b35SErik Nordmark ill_t *ill; 1087bd670b35SErik Nordmark 1088bd670b35SErik Nordmark ill = ire->ire_ill; 1089bd670b35SErik Nordmark 1090bd670b35SErik Nordmark rw_enter(&irb_ptr->irb_lock, RW_WRITER); 1091bd670b35SErik Nordmark if (ill != NULL) { 10927c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 1093bd670b35SErik Nordmark 1094bd670b35SErik Nordmark /* 1095bd670b35SErik Nordmark * Don't allow IRE's to be created on dying ills. 1096bd670b35SErik Nordmark */ 10977c478bd9Sstevel@tonic-gate if (ill->ill_state_flags & ILL_CONDEMNED) { 1098bd670b35SErik Nordmark ire_atomic_end(irb_ptr, ire); 1099bd670b35SErik Nordmark return (ENXIO); 11007c478bd9Sstevel@tonic-gate } 11017c478bd9Sstevel@tonic-gate 1102bd670b35SErik Nordmark if (IS_UNDER_IPMP(ill)) { 1103bd670b35SErik Nordmark int error = 0; 1104bd670b35SErik Nordmark mutex_enter(&ill->ill_phyint->phyint_lock); 1105bd670b35SErik Nordmark if (!ipmp_ill_is_active(ill) && 1106bd670b35SErik Nordmark IRE_HIDDEN_TYPE(ire->ire_type) && 1107bd670b35SErik Nordmark !ire->ire_testhidden) { 1108bd670b35SErik Nordmark error = EINVAL; 1109dc3879f9Sjarrett } 1110bd670b35SErik Nordmark mutex_exit(&ill->ill_phyint->phyint_lock); 1111dc3879f9Sjarrett if (error != 0) { 1112bd670b35SErik Nordmark ire_atomic_end(irb_ptr, ire); 1113dc3879f9Sjarrett return (error); 1114dc3879f9Sjarrett } 1115dc3879f9Sjarrett } 1116bd670b35SErik Nordmark 1117bd670b35SErik Nordmark } 1118bd670b35SErik Nordmark return (0); 11197c478bd9Sstevel@tonic-gate } 11207c478bd9Sstevel@tonic-gate 11217c478bd9Sstevel@tonic-gate /* 1122bd670b35SErik Nordmark * Add a fully initialized IRE to the forwarding table. 1123bd670b35SErik Nordmark * This returns NULL on failure, or a held IRE on success. 1124bd670b35SErik Nordmark * Normally the returned IRE is the same as the argument. But a different 1125bd670b35SErik Nordmark * IRE will be returned if the added IRE is deemed identical to an existing 1126bd670b35SErik Nordmark * one. In that case ire_identical_ref will be increased. 1127bd670b35SErik Nordmark * The caller always needs to do an ire_refrele() on the returned IRE. 11287c478bd9Sstevel@tonic-gate */ 1129bd670b35SErik Nordmark ire_t * 1130bd670b35SErik Nordmark ire_add(ire_t *ire) 1131bd670b35SErik Nordmark { 1132bd670b35SErik Nordmark if (IRE_HIDDEN_TYPE(ire->ire_type) && 1133bd670b35SErik Nordmark ire->ire_ill != NULL && IS_UNDER_IPMP(ire->ire_ill)) { 1134bd670b35SErik Nordmark /* 1135bd670b35SErik Nordmark * IREs hosted on interfaces that are under IPMP 1136bd670b35SErik Nordmark * should be hidden so that applications don't 1137bd670b35SErik Nordmark * accidentally end up sending packets with test 1138bd670b35SErik Nordmark * addresses as their source addresses, or 1139bd670b35SErik Nordmark * sending out interfaces that are e.g. IFF_INACTIVE. 1140bd670b35SErik Nordmark * Hide them here. 1141bd670b35SErik Nordmark */ 1142bd670b35SErik Nordmark ire->ire_testhidden = B_TRUE; 1143bd670b35SErik Nordmark } 1144bd670b35SErik Nordmark 11455c0b7edeSseb if (ire->ire_ipversion == IPV6_VERSION) 1146bd670b35SErik Nordmark return (ire_add_v6(ire)); 11477c478bd9Sstevel@tonic-gate else 1148bd670b35SErik Nordmark return (ire_add_v4(ire)); 11497c478bd9Sstevel@tonic-gate } 11507c478bd9Sstevel@tonic-gate 11517c478bd9Sstevel@tonic-gate /* 1152bd670b35SErik Nordmark * Add a fully initialized IPv4 IRE to the forwarding table. 1153bd670b35SErik Nordmark * This returns NULL on failure, or a held IRE on success. 1154bd670b35SErik Nordmark * Normally the returned IRE is the same as the argument. But a different 1155bd670b35SErik Nordmark * IRE will be returned if the added IRE is deemed identical to an existing 1156bd670b35SErik Nordmark * one. In that case ire_identical_ref will be increased. 1157bd670b35SErik Nordmark * The caller always needs to do an ire_refrele() on the returned IRE. 11587c478bd9Sstevel@tonic-gate */ 1159bd670b35SErik Nordmark static ire_t * 1160bd670b35SErik Nordmark ire_add_v4(ire_t *ire) 11617c478bd9Sstevel@tonic-gate { 11627c478bd9Sstevel@tonic-gate ire_t *ire1; 11637c478bd9Sstevel@tonic-gate irb_t *irb_ptr; 11647c478bd9Sstevel@tonic-gate ire_t **irep; 1165bd670b35SErik Nordmark int match_flags; 11667c478bd9Sstevel@tonic-gate int error; 1167f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 1168e11c3f44Smeem 1169bd670b35SErik Nordmark if (ire->ire_ill != NULL) 1170bd670b35SErik Nordmark ASSERT(!MUTEX_HELD(&ire->ire_ill->ill_lock)); 11717c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 11727c478bd9Sstevel@tonic-gate 11737c478bd9Sstevel@tonic-gate /* Make sure the address is properly masked. */ 11747c478bd9Sstevel@tonic-gate ire->ire_addr &= ire->ire_mask; 11757c478bd9Sstevel@tonic-gate 1176bd670b35SErik Nordmark match_flags = (MATCH_IRE_MASK | MATCH_IRE_TYPE | MATCH_IRE_GW); 1177c793af95Ssangeeta 1178bd670b35SErik Nordmark if (ire->ire_ill != NULL) { 1179bd670b35SErik Nordmark match_flags |= MATCH_IRE_ILL; 1180bd670b35SErik Nordmark } 1181bd670b35SErik Nordmark irb_ptr = ire_get_bucket(ire); 1182bd670b35SErik Nordmark if (irb_ptr == NULL) { 1183bd670b35SErik Nordmark printf("no bucket for %p\n", (void *)ire); 11847c478bd9Sstevel@tonic-gate ire_delete(ire); 1185bd670b35SErik Nordmark return (NULL); 11867c478bd9Sstevel@tonic-gate } 11877c478bd9Sstevel@tonic-gate 11887c478bd9Sstevel@tonic-gate /* 1189bd670b35SErik Nordmark * Start the atomic add of the ire. Grab the ill lock, 1190bd670b35SErik Nordmark * the bucket lock. Check for condemned. 11917c478bd9Sstevel@tonic-gate */ 1192bd670b35SErik Nordmark error = ire_atomic_start(irb_ptr, ire); 1193bd670b35SErik Nordmark if (error != 0) { 1194bd670b35SErik Nordmark printf("no ire_atomic_start for %p\n", (void *)ire); 1195bd670b35SErik Nordmark ire_delete(ire); 1196bd670b35SErik Nordmark irb_refrele(irb_ptr); 1197bd670b35SErik Nordmark return (NULL); 1198bd670b35SErik Nordmark } 11997c478bd9Sstevel@tonic-gate /* 1200e11c3f44Smeem * If we are creating a hidden IRE, make sure we search for 1201e11c3f44Smeem * hidden IREs when searching for duplicates below. 1202e11c3f44Smeem * Otherwise, we might find an IRE on some other interface 1203e11c3f44Smeem * that's not marked hidden. 12047c478bd9Sstevel@tonic-gate */ 1205bd670b35SErik Nordmark if (ire->ire_testhidden) 1206bd670b35SErik Nordmark match_flags |= MATCH_IRE_TESTHIDDEN; 12077c478bd9Sstevel@tonic-gate 12087c478bd9Sstevel@tonic-gate /* 12097c478bd9Sstevel@tonic-gate * Atomically check for duplicate and insert in the table. 12107c478bd9Sstevel@tonic-gate */ 12117c478bd9Sstevel@tonic-gate for (ire1 = irb_ptr->irb_ire; ire1 != NULL; ire1 = ire1->ire_next) { 1212bd670b35SErik Nordmark if (IRE_IS_CONDEMNED(ire1)) 12137c478bd9Sstevel@tonic-gate continue; 12147c478bd9Sstevel@tonic-gate /* 1215bd670b35SErik Nordmark * Here we need an exact match on zoneid, i.e., 1216bd670b35SErik Nordmark * ire_match_args doesn't fit. 12177c478bd9Sstevel@tonic-gate */ 12187c478bd9Sstevel@tonic-gate if (ire1->ire_zoneid != ire->ire_zoneid) 12197c478bd9Sstevel@tonic-gate continue; 1220bd670b35SErik Nordmark 1221bd670b35SErik Nordmark if (ire1->ire_type != ire->ire_type) 1222bd670b35SErik Nordmark continue; 1223bd670b35SErik Nordmark 1224bd670b35SErik Nordmark /* 1225bd670b35SErik Nordmark * Note: We do not allow multiple routes that differ only 1226bd670b35SErik Nordmark * in the gateway security attributes; such routes are 1227bd670b35SErik Nordmark * considered duplicates. 1228bd670b35SErik Nordmark * To change that we explicitly have to treat them as 1229bd670b35SErik Nordmark * different here. 1230bd670b35SErik Nordmark */ 12317c478bd9Sstevel@tonic-gate if (ire_match_args(ire1, ire->ire_addr, ire->ire_mask, 1232bd670b35SErik Nordmark ire->ire_gateway_addr, ire->ire_type, ire->ire_ill, 1233bd670b35SErik Nordmark ire->ire_zoneid, NULL, match_flags)) { 12347c478bd9Sstevel@tonic-gate /* 12357c478bd9Sstevel@tonic-gate * Return the old ire after doing a REFHOLD. 12367c478bd9Sstevel@tonic-gate * As most of the callers continue to use the IRE 12377c478bd9Sstevel@tonic-gate * after adding, we return a held ire. This will 12387c478bd9Sstevel@tonic-gate * avoid a lookup in the caller again. If the callers 12397c478bd9Sstevel@tonic-gate * don't want to use it, they need to do a REFRELE. 12407c478bd9Sstevel@tonic-gate */ 1241bd670b35SErik Nordmark atomic_add_32(&ire1->ire_identical_ref, 1); 1242bd670b35SErik Nordmark DTRACE_PROBE2(ire__add__exist, ire_t *, ire1, 1243bd670b35SErik Nordmark ire_t *, ire); 1244bd670b35SErik Nordmark ire_refhold(ire1); 12457c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 12467c478bd9Sstevel@tonic-gate ire_delete(ire); 1247bd670b35SErik Nordmark irb_refrele(irb_ptr); 1248bd670b35SErik Nordmark return (ire1); 12497c478bd9Sstevel@tonic-gate } 12507c478bd9Sstevel@tonic-gate } 1251e11c3f44Smeem 1252c793af95Ssangeeta /* 1253bd670b35SErik Nordmark * Normally we do head insertion since most things do not care about 1254bd670b35SErik Nordmark * the order of the IREs in the bucket. Note that ip_cgtp_bcast_add 1255bd670b35SErik Nordmark * assumes we at least do head insertion so that its IRE_BROADCAST 1256bd670b35SErik Nordmark * arrive ahead of existing IRE_HOST for the same address. 1257bd670b35SErik Nordmark * However, due to shared-IP zones (and restrict_interzone_loopback) 1258bd670b35SErik Nordmark * we can have an IRE_LOCAL as well as IRE_IF_CLONE for the same 1259bd670b35SErik Nordmark * address. For that reason we do tail insertion for IRE_IF_CLONE. 1260bd670b35SErik Nordmark * Due to the IRE_BROADCAST on cgtp0, which must be last in the bucket, 1261bd670b35SErik Nordmark * we do tail insertion of IRE_BROADCASTs that do not have RTF_MULTIRT 1262bd670b35SErik Nordmark * set. 12637c478bd9Sstevel@tonic-gate */ 12647c478bd9Sstevel@tonic-gate irep = (ire_t **)irb_ptr; 1265bd670b35SErik Nordmark if ((ire->ire_type & IRE_IF_CLONE) || 1266bd670b35SErik Nordmark ((ire->ire_type & IRE_BROADCAST) && 1267bd670b35SErik Nordmark !(ire->ire_flags & RTF_MULTIRT))) { 1268bd670b35SErik Nordmark while ((ire1 = *irep) != NULL) 12697c478bd9Sstevel@tonic-gate irep = &ire1->ire_next; 12707c478bd9Sstevel@tonic-gate } 12717c478bd9Sstevel@tonic-gate /* Insert at *irep */ 12727c478bd9Sstevel@tonic-gate ire1 = *irep; 12737c478bd9Sstevel@tonic-gate if (ire1 != NULL) 12747c478bd9Sstevel@tonic-gate ire1->ire_ptpn = &ire->ire_next; 12757c478bd9Sstevel@tonic-gate ire->ire_next = ire1; 12767c478bd9Sstevel@tonic-gate /* Link the new one in. */ 12777c478bd9Sstevel@tonic-gate ire->ire_ptpn = irep; 12787c478bd9Sstevel@tonic-gate 12797c478bd9Sstevel@tonic-gate /* 12807c478bd9Sstevel@tonic-gate * ire_walk routines de-reference ire_next without holding 12817c478bd9Sstevel@tonic-gate * a lock. Before we point to the new ire, we want to make 12827c478bd9Sstevel@tonic-gate * sure the store that sets the ire_next of the new ire 12837c478bd9Sstevel@tonic-gate * reaches global visibility, so that ire_walk routines 12847c478bd9Sstevel@tonic-gate * don't see a truncated list of ires i.e if the ire_next 12857c478bd9Sstevel@tonic-gate * of the new ire gets set after we do "*irep = ire" due 12867c478bd9Sstevel@tonic-gate * to re-ordering, the ire_walk thread will see a NULL 12877c478bd9Sstevel@tonic-gate * once it accesses the ire_next of the new ire. 12887c478bd9Sstevel@tonic-gate * membar_producer() makes sure that the following store 12897c478bd9Sstevel@tonic-gate * happens *after* all of the above stores. 12907c478bd9Sstevel@tonic-gate */ 12917c478bd9Sstevel@tonic-gate membar_producer(); 12927c478bd9Sstevel@tonic-gate *irep = ire; 12937c478bd9Sstevel@tonic-gate ire->ire_bucket = irb_ptr; 12947c478bd9Sstevel@tonic-gate /* 12957c478bd9Sstevel@tonic-gate * We return a bumped up IRE above. Keep it symmetrical 12967c478bd9Sstevel@tonic-gate * so that the callers will always have to release. This 12977c478bd9Sstevel@tonic-gate * helps the callers of this function because they continue 12987c478bd9Sstevel@tonic-gate * to use the IRE after adding and hence they don't have to 12997c478bd9Sstevel@tonic-gate * lookup again after we return the IRE. 13007c478bd9Sstevel@tonic-gate * 13017c478bd9Sstevel@tonic-gate * NOTE : We don't have to use atomics as this is appearing 13027c478bd9Sstevel@tonic-gate * in the list for the first time and no one else can bump 13037c478bd9Sstevel@tonic-gate * up the reference count on this yet. 13047c478bd9Sstevel@tonic-gate */ 1305bd670b35SErik Nordmark ire_refhold_locked(ire); 1306f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_inserted); 1307c793af95Ssangeeta 13087c478bd9Sstevel@tonic-gate irb_ptr->irb_ire_cnt++; 1309bd670b35SErik Nordmark if (irb_ptr->irb_marks & IRB_MARK_DYNAMIC) 1310c793af95Ssangeeta irb_ptr->irb_nire++; 1311c793af95Ssangeeta 1312bd670b35SErik Nordmark if (ire->ire_ill != NULL) { 1313bd670b35SErik Nordmark ire->ire_ill->ill_ire_cnt++; 1314bd670b35SErik Nordmark ASSERT(ire->ire_ill->ill_ire_cnt != 0); /* Wraparound */ 13157c478bd9Sstevel@tonic-gate } 13167c478bd9Sstevel@tonic-gate 13177c478bd9Sstevel@tonic-gate ire_atomic_end(irb_ptr, ire); 13187c478bd9Sstevel@tonic-gate 1319bd670b35SErik Nordmark /* Make any caching of the IREs be notified or updated */ 13207c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire, IRE_FLUSH_ADD); 1321bd670b35SErik Nordmark 1322bd670b35SErik Nordmark if (ire->ire_ill != NULL) 1323bd670b35SErik Nordmark ASSERT(!MUTEX_HELD(&ire->ire_ill->ill_lock)); 1324bd670b35SErik Nordmark irb_refrele(irb_ptr); 1325bd670b35SErik Nordmark return (ire); 13267c478bd9Sstevel@tonic-gate } 13277c478bd9Sstevel@tonic-gate 13287c478bd9Sstevel@tonic-gate /* 1329bd670b35SErik Nordmark * irb_refrele is the only caller of the function. ire_unlink calls to 13307c478bd9Sstevel@tonic-gate * do the final cleanup for this ire. 13317c478bd9Sstevel@tonic-gate */ 13327c478bd9Sstevel@tonic-gate void 13337c478bd9Sstevel@tonic-gate ire_cleanup(ire_t *ire) 13347c478bd9Sstevel@tonic-gate { 13357c478bd9Sstevel@tonic-gate ire_t *ire_next; 1336f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 13377c478bd9Sstevel@tonic-gate 13387c478bd9Sstevel@tonic-gate ASSERT(ire != NULL); 13397c478bd9Sstevel@tonic-gate 13407c478bd9Sstevel@tonic-gate while (ire != NULL) { 13417c478bd9Sstevel@tonic-gate ire_next = ire->ire_next; 13427c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV4_VERSION) { 13437c478bd9Sstevel@tonic-gate ire_delete_v4(ire); 1344f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, 1345f4b3ec61Sdh155122 ire_stats_deleted); 13467c478bd9Sstevel@tonic-gate } else { 13477c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV6_VERSION); 13487c478bd9Sstevel@tonic-gate ire_delete_v6(ire); 1349f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v6, 1350f4b3ec61Sdh155122 ire_stats_deleted); 13517c478bd9Sstevel@tonic-gate } 13527c478bd9Sstevel@tonic-gate /* 13537c478bd9Sstevel@tonic-gate * Now it's really out of the list. Before doing the 13547c478bd9Sstevel@tonic-gate * REFRELE, set ire_next to NULL as ire_inactive asserts 13557c478bd9Sstevel@tonic-gate * so. 13567c478bd9Sstevel@tonic-gate */ 13577c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 1358bd670b35SErik Nordmark ire_refrele_notr(ire); 13597c478bd9Sstevel@tonic-gate ire = ire_next; 13607c478bd9Sstevel@tonic-gate } 13617c478bd9Sstevel@tonic-gate } 13627c478bd9Sstevel@tonic-gate 13637c478bd9Sstevel@tonic-gate /* 1364bd670b35SErik Nordmark * irb_refrele is the only caller of the function. It calls to unlink 13657c478bd9Sstevel@tonic-gate * all the CONDEMNED ires from this bucket. 13667c478bd9Sstevel@tonic-gate */ 13677c478bd9Sstevel@tonic-gate ire_t * 13687c478bd9Sstevel@tonic-gate ire_unlink(irb_t *irb) 13697c478bd9Sstevel@tonic-gate { 13707c478bd9Sstevel@tonic-gate ire_t *ire; 13717c478bd9Sstevel@tonic-gate ire_t *ire1; 13727c478bd9Sstevel@tonic-gate ire_t **ptpn; 13737c478bd9Sstevel@tonic-gate ire_t *ire_list = NULL; 13747c478bd9Sstevel@tonic-gate 13757c478bd9Sstevel@tonic-gate ASSERT(RW_WRITE_HELD(&irb->irb_lock)); 1376bd670b35SErik Nordmark ASSERT(((irb->irb_marks & IRB_MARK_DYNAMIC) && irb->irb_refcnt == 1) || 1377c793af95Ssangeeta (irb->irb_refcnt == 0)); 1378c793af95Ssangeeta ASSERT(irb->irb_marks & IRB_MARK_CONDEMNED); 13797c478bd9Sstevel@tonic-gate ASSERT(irb->irb_ire != NULL); 13807c478bd9Sstevel@tonic-gate 13817c478bd9Sstevel@tonic-gate for (ire = irb->irb_ire; ire != NULL; ire = ire1) { 13827c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 1383bd670b35SErik Nordmark if (IRE_IS_CONDEMNED(ire)) { 13847c478bd9Sstevel@tonic-gate ptpn = ire->ire_ptpn; 13857c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 13867c478bd9Sstevel@tonic-gate if (ire1) 13877c478bd9Sstevel@tonic-gate ire1->ire_ptpn = ptpn; 13887c478bd9Sstevel@tonic-gate *ptpn = ire1; 13897c478bd9Sstevel@tonic-gate ire->ire_ptpn = NULL; 13907c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 1391bd670b35SErik Nordmark 13927c478bd9Sstevel@tonic-gate /* 1393bd670b35SErik Nordmark * We need to call ire_delete_v4 or ire_delete_v6 to 1394bd670b35SErik Nordmark * clean up dependents and the redirects pointing at 13957c478bd9Sstevel@tonic-gate * the default gateway. We need to drop the lock 13967c478bd9Sstevel@tonic-gate * as ire_flush_cache/ire_delete_host_redircts require 13977c478bd9Sstevel@tonic-gate * so. But we can't drop the lock, as ire_unlink needs 13987c478bd9Sstevel@tonic-gate * to atomically remove the ires from the list. 13997c478bd9Sstevel@tonic-gate * So, create a temporary list of CONDEMNED ires 14007c478bd9Sstevel@tonic-gate * for doing ire_delete_v4/ire_delete_v6 operations 14017c478bd9Sstevel@tonic-gate * later on. 14027c478bd9Sstevel@tonic-gate */ 14037c478bd9Sstevel@tonic-gate ire->ire_next = ire_list; 14047c478bd9Sstevel@tonic-gate ire_list = ire; 14057c478bd9Sstevel@tonic-gate } 14067c478bd9Sstevel@tonic-gate } 1407c793af95Ssangeeta irb->irb_marks &= ~IRB_MARK_CONDEMNED; 14087c478bd9Sstevel@tonic-gate return (ire_list); 14097c478bd9Sstevel@tonic-gate } 14107c478bd9Sstevel@tonic-gate 14117c478bd9Sstevel@tonic-gate /* 1412bd670b35SErik Nordmark * Clean up the radix node for this ire. Must be called by irb_refrele 1413c793af95Ssangeeta * when there are no ire's left in the bucket. Returns TRUE if the bucket 1414c793af95Ssangeeta * is deleted and freed. 1415c793af95Ssangeeta */ 1416c793af95Ssangeeta boolean_t 1417c793af95Ssangeeta irb_inactive(irb_t *irb) 1418c793af95Ssangeeta { 1419c793af95Ssangeeta struct rt_entry *rt; 1420c793af95Ssangeeta struct radix_node *rn; 1421f4b3ec61Sdh155122 ip_stack_t *ipst = irb->irb_ipst; 1422f4b3ec61Sdh155122 1423f4b3ec61Sdh155122 ASSERT(irb->irb_ipst != NULL); 1424c793af95Ssangeeta 1425c793af95Ssangeeta rt = IRB2RT(irb); 1426c793af95Ssangeeta rn = (struct radix_node *)rt; 1427c793af95Ssangeeta 1428c793af95Ssangeeta /* first remove it from the radix tree. */ 1429f4b3ec61Sdh155122 RADIX_NODE_HEAD_WLOCK(ipst->ips_ip_ftable); 1430c793af95Ssangeeta rw_enter(&irb->irb_lock, RW_WRITER); 1431c793af95Ssangeeta if (irb->irb_refcnt == 1 && irb->irb_nire == 0) { 1432f4b3ec61Sdh155122 rn = ipst->ips_ip_ftable->rnh_deladdr(rn->rn_key, rn->rn_mask, 1433f4b3ec61Sdh155122 ipst->ips_ip_ftable); 1434c793af95Ssangeeta DTRACE_PROBE1(irb__free, rt_t *, rt); 1435c793af95Ssangeeta ASSERT((void *)rn == (void *)rt); 1436c793af95Ssangeeta Free(rt, rt_entry_cache); 1437c793af95Ssangeeta /* irb_lock is freed */ 1438f4b3ec61Sdh155122 RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 1439c793af95Ssangeeta return (B_TRUE); 1440c793af95Ssangeeta } 1441c793af95Ssangeeta rw_exit(&irb->irb_lock); 1442f4b3ec61Sdh155122 RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 1443c793af95Ssangeeta return (B_FALSE); 14447c478bd9Sstevel@tonic-gate } 14457c478bd9Sstevel@tonic-gate 14467c478bd9Sstevel@tonic-gate /* 14477c478bd9Sstevel@tonic-gate * Delete the specified IRE. 1448bd670b35SErik Nordmark * We assume that if ire_bucket is not set then ire_ill->ill_ire_cnt was 1449bd670b35SErik Nordmark * not incremented i.e., that the insertion in the bucket and the increment 1450bd670b35SErik Nordmark * of that counter is done atomically. 14517c478bd9Sstevel@tonic-gate */ 14527c478bd9Sstevel@tonic-gate void 14537c478bd9Sstevel@tonic-gate ire_delete(ire_t *ire) 14547c478bd9Sstevel@tonic-gate { 14557c478bd9Sstevel@tonic-gate ire_t *ire1; 14567c478bd9Sstevel@tonic-gate ire_t **ptpn; 14577c478bd9Sstevel@tonic-gate irb_t *irb; 1458bd670b35SErik Nordmark nce_t *nce; 1459f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 14607c478bd9Sstevel@tonic-gate 1461bd670b35SErik Nordmark /* We can clear ire_nce_cache under ire_lock even if the IRE is used */ 1462bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 1463bd670b35SErik Nordmark nce = ire->ire_nce_cache; 1464bd670b35SErik Nordmark ire->ire_nce_cache = NULL; 1465bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 1466bd670b35SErik Nordmark if (nce != NULL) 1467bd670b35SErik Nordmark nce_refrele(nce); 1468bd670b35SErik Nordmark 1469c793af95Ssangeeta if ((irb = ire->ire_bucket) == NULL) { 14707c478bd9Sstevel@tonic-gate /* 14717c478bd9Sstevel@tonic-gate * It was never inserted in the list. Should call REFRELE 14727c478bd9Sstevel@tonic-gate * to free this IRE. 14737c478bd9Sstevel@tonic-gate */ 1474bd670b35SErik Nordmark ire_refrele_notr(ire); 14757c478bd9Sstevel@tonic-gate return; 14767c478bd9Sstevel@tonic-gate } 14777c478bd9Sstevel@tonic-gate 14787c478bd9Sstevel@tonic-gate /* 1479bd670b35SErik Nordmark * Move the use counts from an IRE_IF_CLONE to its parent 1480bd670b35SErik Nordmark * IRE_INTERFACE. 1481bd670b35SErik Nordmark * We need to do this before acquiring irb_lock. 14827c478bd9Sstevel@tonic-gate */ 1483bd670b35SErik Nordmark if (ire->ire_type & IRE_IF_CLONE) { 1484bd670b35SErik Nordmark ire_t *parent; 1485bd670b35SErik Nordmark 1486bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 1487bd670b35SErik Nordmark if ((parent = ire->ire_dep_parent) != NULL) { 1488bd670b35SErik Nordmark parent->ire_ob_pkt_count += ire->ire_ob_pkt_count; 1489bd670b35SErik Nordmark parent->ire_ib_pkt_count += ire->ire_ib_pkt_count; 1490bd670b35SErik Nordmark ire->ire_ob_pkt_count = 0; 1491bd670b35SErik Nordmark ire->ire_ib_pkt_count = 0; 1492bd670b35SErik Nordmark } 1493bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 14947c478bd9Sstevel@tonic-gate } 14957c478bd9Sstevel@tonic-gate 1496bd670b35SErik Nordmark rw_enter(&irb->irb_lock, RW_WRITER); 14977c478bd9Sstevel@tonic-gate if (ire->ire_ptpn == NULL) { 14987c478bd9Sstevel@tonic-gate /* 14997c478bd9Sstevel@tonic-gate * Some other thread has removed us from the list. 15007c478bd9Sstevel@tonic-gate * It should have done the REFRELE for us. 15017c478bd9Sstevel@tonic-gate */ 15027c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 15037c478bd9Sstevel@tonic-gate return; 15047c478bd9Sstevel@tonic-gate } 15057c478bd9Sstevel@tonic-gate 1506bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(ire)) { 1507bd670b35SErik Nordmark /* Is this an IRE representing multiple duplicate entries? */ 1508bd670b35SErik Nordmark ASSERT(ire->ire_identical_ref >= 1); 1509bd670b35SErik Nordmark if (atomic_add_32_nv(&ire->ire_identical_ref, -1) != 0) { 1510bd670b35SErik Nordmark /* Removed one of the identical parties */ 1511bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 1512bd670b35SErik Nordmark return; 15139a09d68dSja97890 } 1514bd670b35SErik Nordmark 1515bd670b35SErik Nordmark irb->irb_ire_cnt--; 1516bd670b35SErik Nordmark ire_make_condemned(ire); 15179a09d68dSja97890 } 15189a09d68dSja97890 15197c478bd9Sstevel@tonic-gate if (irb->irb_refcnt != 0) { 15207c478bd9Sstevel@tonic-gate /* 15217c478bd9Sstevel@tonic-gate * The last thread to leave this bucket will 15227c478bd9Sstevel@tonic-gate * delete this ire. 15237c478bd9Sstevel@tonic-gate */ 1524c793af95Ssangeeta irb->irb_marks |= IRB_MARK_CONDEMNED; 15257c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 15267c478bd9Sstevel@tonic-gate return; 15277c478bd9Sstevel@tonic-gate } 15287c478bd9Sstevel@tonic-gate 15297c478bd9Sstevel@tonic-gate /* 15307c478bd9Sstevel@tonic-gate * Normally to delete an ire, we walk the bucket. While we 15317c478bd9Sstevel@tonic-gate * walk the bucket, we normally bump up irb_refcnt and hence 15327c478bd9Sstevel@tonic-gate * we return from above where we mark CONDEMNED and the ire 15337c478bd9Sstevel@tonic-gate * gets deleted from ire_unlink. This case is where somebody 15347c478bd9Sstevel@tonic-gate * knows the ire e.g by doing a lookup, and wants to delete the 15357c478bd9Sstevel@tonic-gate * IRE. irb_refcnt would be 0 in this case if nobody is walking 15367c478bd9Sstevel@tonic-gate * the bucket. 15377c478bd9Sstevel@tonic-gate */ 15387c478bd9Sstevel@tonic-gate ptpn = ire->ire_ptpn; 15397c478bd9Sstevel@tonic-gate ire1 = ire->ire_next; 15407c478bd9Sstevel@tonic-gate if (ire1 != NULL) 15417c478bd9Sstevel@tonic-gate ire1->ire_ptpn = ptpn; 15427c478bd9Sstevel@tonic-gate ASSERT(ptpn != NULL); 15437c478bd9Sstevel@tonic-gate *ptpn = ire1; 15447c478bd9Sstevel@tonic-gate ire->ire_ptpn = NULL; 15457c478bd9Sstevel@tonic-gate ire->ire_next = NULL; 15467c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 1547f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v6, ire_stats_deleted); 15487c478bd9Sstevel@tonic-gate } else { 1549f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_deleted); 15507c478bd9Sstevel@tonic-gate } 15517c478bd9Sstevel@tonic-gate rw_exit(&irb->irb_lock); 15527c478bd9Sstevel@tonic-gate 1553bd670b35SErik Nordmark /* Cleanup dependents and related stuff */ 15547c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 15557c478bd9Sstevel@tonic-gate ire_delete_v6(ire); 15567c478bd9Sstevel@tonic-gate } else { 15577c478bd9Sstevel@tonic-gate ire_delete_v4(ire); 15587c478bd9Sstevel@tonic-gate } 15597c478bd9Sstevel@tonic-gate /* 15607c478bd9Sstevel@tonic-gate * We removed it from the list. Decrement the 15617c478bd9Sstevel@tonic-gate * reference count. 15627c478bd9Sstevel@tonic-gate */ 1563bd670b35SErik Nordmark ire_refrele_notr(ire); 15647c478bd9Sstevel@tonic-gate } 15657c478bd9Sstevel@tonic-gate 15667c478bd9Sstevel@tonic-gate /* 15677c478bd9Sstevel@tonic-gate * Delete the specified IRE. 15687c478bd9Sstevel@tonic-gate * All calls should use ire_delete(). 15697c478bd9Sstevel@tonic-gate * Sometimes called as writer though not required by this function. 15707c478bd9Sstevel@tonic-gate * 15717c478bd9Sstevel@tonic-gate * NOTE : This function is called only if the ire was added 15727c478bd9Sstevel@tonic-gate * in the list. 15737c478bd9Sstevel@tonic-gate */ 15747c478bd9Sstevel@tonic-gate static void 15757c478bd9Sstevel@tonic-gate ire_delete_v4(ire_t *ire) 15767c478bd9Sstevel@tonic-gate { 1577f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 1578f4b3ec61Sdh155122 15797c478bd9Sstevel@tonic-gate ASSERT(ire->ire_refcnt >= 1); 15807c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 15817c478bd9Sstevel@tonic-gate 15827c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire, IRE_FLUSH_DELETE); 15837c478bd9Sstevel@tonic-gate if (ire->ire_type == IRE_DEFAULT) { 15847c478bd9Sstevel@tonic-gate /* 15857c478bd9Sstevel@tonic-gate * when a default gateway is going away 15867c478bd9Sstevel@tonic-gate * delete all the host redirects pointing at that 15877c478bd9Sstevel@tonic-gate * gateway. 15887c478bd9Sstevel@tonic-gate */ 1589f4b3ec61Sdh155122 ire_delete_host_redirects(ire->ire_gateway_addr, ipst); 15907c478bd9Sstevel@tonic-gate } 1591bd670b35SErik Nordmark 1592bd670b35SErik Nordmark /* 1593bd670b35SErik Nordmark * If we are deleting an IRE_INTERFACE then we make sure we also 1594bd670b35SErik Nordmark * delete any IRE_IF_CLONE that has been created from it. 1595bd670b35SErik Nordmark * Those are always in ire_dep_children. 1596bd670b35SErik Nordmark */ 1597bd670b35SErik Nordmark if ((ire->ire_type & IRE_INTERFACE) && ire->ire_dep_children != NULL) 1598bd670b35SErik Nordmark ire_dep_delete_if_clone(ire); 1599bd670b35SErik Nordmark 1600bd670b35SErik Nordmark /* Remove from parent dependencies and child */ 1601bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_WRITER); 1602bd670b35SErik Nordmark if (ire->ire_dep_parent != NULL) 1603bd670b35SErik Nordmark ire_dep_remove(ire); 1604bd670b35SErik Nordmark 1605bd670b35SErik Nordmark while (ire->ire_dep_children != NULL) 1606bd670b35SErik Nordmark ire_dep_remove(ire->ire_dep_children); 1607bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 16087c478bd9Sstevel@tonic-gate } 16097c478bd9Sstevel@tonic-gate 16107c478bd9Sstevel@tonic-gate /* 1611bd670b35SErik Nordmark * ire_refrele is the only caller of the function. It calls 16127c478bd9Sstevel@tonic-gate * to free the ire when the reference count goes to zero. 16137c478bd9Sstevel@tonic-gate */ 16147c478bd9Sstevel@tonic-gate void 16157c478bd9Sstevel@tonic-gate ire_inactive(ire_t *ire) 16167c478bd9Sstevel@tonic-gate { 1617bd670b35SErik Nordmark ill_t *ill; 1618c793af95Ssangeeta irb_t *irb; 1619f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 16207c478bd9Sstevel@tonic-gate 16217c478bd9Sstevel@tonic-gate ASSERT(ire->ire_refcnt == 0); 16227c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ptpn == NULL); 16237c478bd9Sstevel@tonic-gate ASSERT(ire->ire_next == NULL); 16247c478bd9Sstevel@tonic-gate 1625bd670b35SErik Nordmark /* Count how many condemned ires for kmem_cache callback */ 1626bd670b35SErik Nordmark if (IRE_IS_CONDEMNED(ire)) 1627bd670b35SErik Nordmark atomic_add_32(&ipst->ips_num_ire_condemned, -1); 1628bd670b35SErik Nordmark 1629c793af95Ssangeeta if (ire->ire_gw_secattr != NULL) { 1630c793af95Ssangeeta ire_gw_secattr_free(ire->ire_gw_secattr); 1631c793af95Ssangeeta ire->ire_gw_secattr = NULL; 1632c793af95Ssangeeta } 1633c793af95Ssangeeta 1634bd670b35SErik Nordmark /* 1635bd670b35SErik Nordmark * ire_nce_cache is cleared in ire_delete, and we make sure we don't 1636bd670b35SErik Nordmark * set it once the ire is marked condemned. 1637bd670b35SErik Nordmark */ 1638bd670b35SErik Nordmark ASSERT(ire->ire_nce_cache == NULL); 16397c478bd9Sstevel@tonic-gate 16407c478bd9Sstevel@tonic-gate /* 1641bd670b35SErik Nordmark * Since any parent would have a refhold on us they would already 1642bd670b35SErik Nordmark * have been removed. 16437c478bd9Sstevel@tonic-gate */ 1644bd670b35SErik Nordmark ASSERT(ire->ire_dep_parent == NULL); 1645bd670b35SErik Nordmark ASSERT(ire->ire_dep_sib_next == NULL); 1646bd670b35SErik Nordmark ASSERT(ire->ire_dep_sib_ptpn == NULL); 16477c478bd9Sstevel@tonic-gate 1648bd670b35SErik Nordmark /* 1649bd670b35SErik Nordmark * Since any children would have a refhold on us they should have 1650bd670b35SErik Nordmark * already been removed. 1651bd670b35SErik Nordmark */ 1652bd670b35SErik Nordmark ASSERT(ire->ire_dep_children == NULL); 1653bd670b35SErik Nordmark 1654bd670b35SErik Nordmark /* 1655bd670b35SErik Nordmark * ill_ire_ref is increased when the IRE is inserted in the 1656bd670b35SErik Nordmark * bucket - not when the IRE is created. 1657bd670b35SErik Nordmark */ 1658bd670b35SErik Nordmark irb = ire->ire_bucket; 1659bd670b35SErik Nordmark ill = ire->ire_ill; 1660bd670b35SErik Nordmark if (irb != NULL && ill != NULL) { 16617c478bd9Sstevel@tonic-gate mutex_enter(&ill->ill_lock); 1662bd670b35SErik Nordmark ASSERT(ill->ill_ire_cnt != 0); 1663bd670b35SErik Nordmark DTRACE_PROBE3(ill__decr__cnt, (ill_t *), ill, 1664968d2fd1Ssowmini (char *), "ire", (void *), ire); 1665bd670b35SErik Nordmark ill->ill_ire_cnt--; 1666bd670b35SErik Nordmark if (ILL_DOWN_OK(ill)) { 16677c478bd9Sstevel@tonic-gate /* Drops the ill lock */ 16687c478bd9Sstevel@tonic-gate ipif_ill_refrele_tail(ill); 16697c478bd9Sstevel@tonic-gate } else { 16707c478bd9Sstevel@tonic-gate mutex_exit(&ill->ill_lock); 16717c478bd9Sstevel@tonic-gate } 16727c478bd9Sstevel@tonic-gate } 1673bd670b35SErik Nordmark ire->ire_ill = NULL; 1674bd670b35SErik Nordmark 16757c478bd9Sstevel@tonic-gate /* This should be true for both V4 and V6 */ 1676bd670b35SErik Nordmark if (irb != NULL && (irb->irb_marks & IRB_MARK_DYNAMIC)) { 1677c793af95Ssangeeta rw_enter(&irb->irb_lock, RW_WRITER); 1678c793af95Ssangeeta irb->irb_nire--; 1679c793af95Ssangeeta /* 1680c793af95Ssangeeta * Instead of examining the conditions for freeing 1681c793af95Ssangeeta * the radix node here, we do it by calling 1682bd670b35SErik Nordmark * irb_refrele which is a single point in the code 1683c793af95Ssangeeta * that embeds that logic. Bump up the refcnt to 1684bd670b35SErik Nordmark * be able to call irb_refrele 1685c793af95Ssangeeta */ 1686bd670b35SErik Nordmark irb_refhold_locked(irb); 1687c793af95Ssangeeta rw_exit(&irb->irb_lock); 1688bd670b35SErik Nordmark irb_refrele(irb); 1689c793af95Ssangeeta } 16907c478bd9Sstevel@tonic-gate 16916a8288c7Scarlsonj #ifdef DEBUG 16926a8288c7Scarlsonj ire_trace_cleanup(ire); 16937c478bd9Sstevel@tonic-gate #endif 16947c478bd9Sstevel@tonic-gate mutex_destroy(&ire->ire_lock); 16957c478bd9Sstevel@tonic-gate if (ire->ire_ipversion == IPV6_VERSION) { 1696f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v6, ire_stats_freed); 16977c478bd9Sstevel@tonic-gate } else { 1698f4b3ec61Sdh155122 BUMP_IRE_STATS(ipst->ips_ire_stats_v4, ire_stats_freed); 16997c478bd9Sstevel@tonic-gate } 17007c478bd9Sstevel@tonic-gate kmem_cache_free(ire_cache, ire); 17017c478bd9Sstevel@tonic-gate } 17027c478bd9Sstevel@tonic-gate 17037c478bd9Sstevel@tonic-gate /* 1704bd670b35SErik Nordmark * ire_update_generation is the callback function provided by 1705bd670b35SErik Nordmark * ire_get_bucket() to update the generation number of any 1706bd670b35SErik Nordmark * matching shorter route when a new route is added. 1707bd670b35SErik Nordmark * 1708bd670b35SErik Nordmark * This fucntion always returns a failure return (B_FALSE) 1709bd670b35SErik Nordmark * to force the caller (rn_matchaddr_args) 1710bd670b35SErik Nordmark * to back-track up the tree looking for shorter matches. 17117c478bd9Sstevel@tonic-gate */ 1712bd670b35SErik Nordmark /* ARGSUSED */ 1713bd670b35SErik Nordmark static boolean_t 1714bd670b35SErik Nordmark ire_update_generation(struct radix_node *rn, void *arg) 17157c478bd9Sstevel@tonic-gate { 1716bd670b35SErik Nordmark struct rt_entry *rt = (struct rt_entry *)rn; 17177c478bd9Sstevel@tonic-gate 1718bd670b35SErik Nordmark /* We need to handle all in the same bucket */ 1719bd670b35SErik Nordmark irb_increment_generation(&rt->rt_irb); 1720bd670b35SErik Nordmark return (B_FALSE); 17217c478bd9Sstevel@tonic-gate } 17227c478bd9Sstevel@tonic-gate 17237c478bd9Sstevel@tonic-gate /* 1724bd670b35SErik Nordmark * Take care of all the generation numbers in the bucket. 1725bd670b35SErik Nordmark */ 1726bd670b35SErik Nordmark void 1727bd670b35SErik Nordmark irb_increment_generation(irb_t *irb) 1728bd670b35SErik Nordmark { 1729bd670b35SErik Nordmark ire_t *ire; 1730bd670b35SErik Nordmark 1731bd670b35SErik Nordmark if (irb == NULL || irb->irb_ire_cnt == 0) 1732bd670b35SErik Nordmark return; 1733bd670b35SErik Nordmark 1734bd670b35SErik Nordmark irb_refhold(irb); 1735bd670b35SErik Nordmark for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 1736bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(ire)) 1737bd670b35SErik Nordmark ire_increment_generation(ire); /* Ourselves */ 1738bd670b35SErik Nordmark ire_dep_incr_generation(ire); /* Dependants */ 1739bd670b35SErik Nordmark } 1740bd670b35SErik Nordmark irb_refrele(irb); 1741bd670b35SErik Nordmark } 1742bd670b35SErik Nordmark 1743bd670b35SErik Nordmark /* 1744bd670b35SErik Nordmark * When an IRE is added or deleted this routine is called to make sure 1745bd670b35SErik Nordmark * any caching of IRE information is notified or updated. 17467c478bd9Sstevel@tonic-gate * 17477c478bd9Sstevel@tonic-gate * The flag argument indicates if the flush request is due to addition 1748bd670b35SErik Nordmark * of new route (IRE_FLUSH_ADD), deletion of old route (IRE_FLUSH_DELETE), 1749bd670b35SErik Nordmark * or a change to ire_gateway_addr (IRE_FLUSH_GWCHANGE). 17507c478bd9Sstevel@tonic-gate */ 17517c478bd9Sstevel@tonic-gate void 17527c478bd9Sstevel@tonic-gate ire_flush_cache_v4(ire_t *ire, int flag) 17537c478bd9Sstevel@tonic-gate { 1754bd670b35SErik Nordmark irb_t *irb = ire->ire_bucket; 1755bd670b35SErik Nordmark struct rt_entry *rt = IRB2RT(irb); 1756f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 17577c478bd9Sstevel@tonic-gate 1758bd670b35SErik Nordmark /* 1759bd670b35SErik Nordmark * IRE_IF_CLONE ire's don't provide any new information 1760bd670b35SErik Nordmark * than the parent from which they are cloned, so don't 1761bd670b35SErik Nordmark * perturb the generation numbers. 1762bd670b35SErik Nordmark */ 1763bd670b35SErik Nordmark if (ire->ire_type & IRE_IF_CLONE) 17647c478bd9Sstevel@tonic-gate return; 17657c478bd9Sstevel@tonic-gate 17667c478bd9Sstevel@tonic-gate /* 1767bd670b35SErik Nordmark * Ensure that an ire_add during a lookup serializes the updates of the 1768bd670b35SErik Nordmark * generation numbers under the radix head lock so that the lookup gets 1769bd670b35SErik Nordmark * either the old ire and old generation number, or a new ire and new 1770bd670b35SErik Nordmark * generation number. 17717c478bd9Sstevel@tonic-gate */ 1772bd670b35SErik Nordmark RADIX_NODE_HEAD_WLOCK(ipst->ips_ip_ftable); 1773bd670b35SErik Nordmark 1774bd670b35SErik Nordmark /* 1775bd670b35SErik Nordmark * If a route was just added, we need to notify everybody that 1776bd670b35SErik Nordmark * has cached an IRE_NOROUTE since there might now be a better 1777bd670b35SErik Nordmark * route for them. 1778bd670b35SErik Nordmark */ 17797c478bd9Sstevel@tonic-gate if (flag == IRE_FLUSH_ADD) { 1780bd670b35SErik Nordmark ire_increment_generation(ipst->ips_ire_reject_v4); 1781bd670b35SErik Nordmark ire_increment_generation(ipst->ips_ire_blackhole_v4); 1782bd670b35SErik Nordmark } 1783bd670b35SErik Nordmark 1784bd670b35SErik Nordmark /* Adding a default can't otherwise provide a better route */ 1785bd670b35SErik Nordmark if (ire->ire_type == IRE_DEFAULT && flag == IRE_FLUSH_ADD) { 1786bd670b35SErik Nordmark RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 1787bd670b35SErik Nordmark return; 1788bd670b35SErik Nordmark } 1789bd670b35SErik Nordmark 1790bd670b35SErik Nordmark switch (flag) { 1791bd670b35SErik Nordmark case IRE_FLUSH_DELETE: 1792bd670b35SErik Nordmark case IRE_FLUSH_GWCHANGE: 17937c478bd9Sstevel@tonic-gate /* 1794bd670b35SErik Nordmark * Update ire_generation for all ire_dep_children chains 1795bd670b35SErik Nordmark * starting with this IRE 17967c478bd9Sstevel@tonic-gate */ 1797bd670b35SErik Nordmark ire_dep_incr_generation(ire); 1798bd670b35SErik Nordmark break; 1799bd670b35SErik Nordmark case IRE_FLUSH_ADD: 18007c478bd9Sstevel@tonic-gate /* 1801bd670b35SErik Nordmark * Update the generation numbers of all shorter matching routes. 1802bd670b35SErik Nordmark * ire_update_generation takes care of the dependants by 1803bd670b35SErik Nordmark * using ire_dep_incr_generation. 18047c478bd9Sstevel@tonic-gate */ 1805bd670b35SErik Nordmark (void) ipst->ips_ip_ftable->rnh_matchaddr_args(&rt->rt_dst, 1806bd670b35SErik Nordmark ipst->ips_ip_ftable, ire_update_generation, NULL); 1807bd670b35SErik Nordmark break; 18087c478bd9Sstevel@tonic-gate } 1809bd670b35SErik Nordmark RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 18107c478bd9Sstevel@tonic-gate } 18117c478bd9Sstevel@tonic-gate 18127c478bd9Sstevel@tonic-gate /* 18137c478bd9Sstevel@tonic-gate * Matches the arguments passed with the values in the ire. 18147c478bd9Sstevel@tonic-gate * 1815bd670b35SErik Nordmark * Note: for match types that match using "ill" passed in, ill 18167c478bd9Sstevel@tonic-gate * must be checked for non-NULL before calling this routine. 18177c478bd9Sstevel@tonic-gate */ 1818c793af95Ssangeeta boolean_t 18197c478bd9Sstevel@tonic-gate ire_match_args(ire_t *ire, ipaddr_t addr, ipaddr_t mask, ipaddr_t gateway, 1820bd670b35SErik Nordmark int type, const ill_t *ill, zoneid_t zoneid, 1821bd670b35SErik Nordmark const ts_label_t *tsl, int match_flags) 18227c478bd9Sstevel@tonic-gate { 18237c478bd9Sstevel@tonic-gate ill_t *ire_ill = NULL, *dst_ill; 1824bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 18257c478bd9Sstevel@tonic-gate 18267c478bd9Sstevel@tonic-gate ASSERT(ire->ire_ipversion == IPV4_VERSION); 18277c478bd9Sstevel@tonic-gate ASSERT((ire->ire_addr & ~ire->ire_mask) == 0); 1828e11c3f44Smeem ASSERT((!(match_flags & MATCH_IRE_ILL)) || 1829bd670b35SErik Nordmark (ill != NULL && !ill->ill_isv6)); 18307c478bd9Sstevel@tonic-gate 18317c478bd9Sstevel@tonic-gate /* 1832bd670b35SErik Nordmark * If MATCH_IRE_TESTHIDDEN is set, then only return the IRE if it is 1833bd670b35SErik Nordmark * in fact hidden, to ensure the caller gets the right one. 18347c478bd9Sstevel@tonic-gate */ 1835bd670b35SErik Nordmark if (ire->ire_testhidden) { 1836bd670b35SErik Nordmark if (!(match_flags & MATCH_IRE_TESTHIDDEN)) 18377c478bd9Sstevel@tonic-gate return (B_FALSE); 1838e11c3f44Smeem } 18397c478bd9Sstevel@tonic-gate 184045916cd2Sjpk if (zoneid != ALL_ZONES && zoneid != ire->ire_zoneid && 184145916cd2Sjpk ire->ire_zoneid != ALL_ZONES) { 18427c478bd9Sstevel@tonic-gate /* 1843bd670b35SErik Nordmark * If MATCH_IRE_ZONEONLY has been set and the supplied zoneid 1844bd670b35SErik Nordmark * does not match that of ire_zoneid, a failure to 18457c478bd9Sstevel@tonic-gate * match is reported at this point. Otherwise, since some IREs 18467c478bd9Sstevel@tonic-gate * that are available in the global zone can be used in local 18477c478bd9Sstevel@tonic-gate * zones, additional checks need to be performed: 18487c478bd9Sstevel@tonic-gate * 1849bd670b35SErik Nordmark * IRE_LOOPBACK 18507c478bd9Sstevel@tonic-gate * entries should never be matched in this situation. 1851bd670b35SErik Nordmark * Each zone has its own IRE_LOOPBACK. 18527c478bd9Sstevel@tonic-gate * 1853bd670b35SErik Nordmark * IRE_LOCAL 1854bd670b35SErik Nordmark * We allow them for any zoneid. ire_route_recursive 1855bd670b35SErik Nordmark * does additional checks when 1856bd670b35SErik Nordmark * ip_restrict_interzone_loopback is set. 18577c478bd9Sstevel@tonic-gate * 1858bd670b35SErik Nordmark * If ill_usesrc_ifindex is set 1859bd670b35SErik Nordmark * Then we check if the zone has a valid source address 1860bd670b35SErik Nordmark * on the usesrc ill. 18617c478bd9Sstevel@tonic-gate * 1862bd670b35SErik Nordmark * If ire_ill is set, then check that the zone has an ipif 1863bd670b35SErik Nordmark * on that ill. 1864bd670b35SErik Nordmark * 1865bd670b35SErik Nordmark * Outside of this function (in ire_round_robin) we check 1866bd670b35SErik Nordmark * that any IRE_OFFLINK has a gateway that reachable from the 1867bd670b35SErik Nordmark * zone when we have multiple choices (ECMP). 18687c478bd9Sstevel@tonic-gate */ 18697c478bd9Sstevel@tonic-gate if (match_flags & MATCH_IRE_ZONEONLY) 18707c478bd9Sstevel@tonic-gate return (B_FALSE); 1871bd670b35SErik Nordmark if (ire->ire_type & IRE_LOOPBACK) 18727c478bd9Sstevel@tonic-gate return (B_FALSE); 1873bd670b35SErik Nordmark 1874bd670b35SErik Nordmark if (ire->ire_type & IRE_LOCAL) 1875bd670b35SErik Nordmark goto matchit; 1876bd670b35SErik Nordmark 18777c478bd9Sstevel@tonic-gate /* 1878bd670b35SErik Nordmark * The normal case of IRE_ONLINK has a matching zoneid. 1879bd670b35SErik Nordmark * Here we handle the case when shared-IP zones have been 1880bd670b35SErik Nordmark * configured with IP addresses on vniN. In that case it 1881bd670b35SErik Nordmark * is ok for traffic from a zone to use IRE_ONLINK routes 1882bd670b35SErik Nordmark * if the ill has a usesrc pointing at vniN 18837c478bd9Sstevel@tonic-gate */ 1884bd670b35SErik Nordmark dst_ill = ire->ire_ill; 1885bd670b35SErik Nordmark if (ire->ire_type & IRE_ONLINK) { 1886bd670b35SErik Nordmark uint_t ifindex; 1887bd670b35SErik Nordmark 1888bd670b35SErik Nordmark /* 1889bd670b35SErik Nordmark * Note there is no IRE_INTERFACE on vniN thus 1890bd670b35SErik Nordmark * can't do an IRE lookup for a matching route. 1891bd670b35SErik Nordmark */ 1892bd670b35SErik Nordmark ifindex = dst_ill->ill_usesrc_ifindex; 1893bd670b35SErik Nordmark if (ifindex == 0) 1894bd670b35SErik Nordmark return (B_FALSE); 1895bd670b35SErik Nordmark 18967c478bd9Sstevel@tonic-gate /* 18977c478bd9Sstevel@tonic-gate * If there is a usable source address in the 1898bd670b35SErik Nordmark * zone, then it's ok to return this IRE_INTERFACE 18997c478bd9Sstevel@tonic-gate */ 1900bd670b35SErik Nordmark if (!ipif_zone_avail(ifindex, dst_ill->ill_isv6, 1901bd670b35SErik Nordmark zoneid, ipst)) { 1902bd670b35SErik Nordmark ip3dbg(("ire_match_args: no usrsrc for zone" 19037c478bd9Sstevel@tonic-gate " dst_ill %p\n", (void *)dst_ill)); 19047c478bd9Sstevel@tonic-gate return (B_FALSE); 19057c478bd9Sstevel@tonic-gate } 19067c478bd9Sstevel@tonic-gate } 1907bd670b35SErik Nordmark /* 1908bd670b35SErik Nordmark * For exampe, with 1909bd670b35SErik Nordmark * route add 11.0.0.0 gw1 -ifp bge0 1910bd670b35SErik Nordmark * route add 11.0.0.0 gw2 -ifp bge1 1911bd670b35SErik Nordmark * this code would differentiate based on 1912bd670b35SErik Nordmark * where the sending zone has addresses. 1913bd670b35SErik Nordmark * Only if the zone has an address on bge0 can it use the first 1914bd670b35SErik Nordmark * route. It isn't clear if this behavior is documented 1915bd670b35SErik Nordmark * anywhere. 1916bd670b35SErik Nordmark */ 1917bd670b35SErik Nordmark if (dst_ill != NULL && (ire->ire_type & IRE_OFFLINK)) { 19187c478bd9Sstevel@tonic-gate ipif_t *tipif; 19197c478bd9Sstevel@tonic-gate 1920bd670b35SErik Nordmark mutex_enter(&dst_ill->ill_lock); 1921bd670b35SErik Nordmark for (tipif = dst_ill->ill_ipif; 19227c478bd9Sstevel@tonic-gate tipif != NULL; tipif = tipif->ipif_next) { 1923bd670b35SErik Nordmark if (!IPIF_IS_CONDEMNED(tipif) && 19247c478bd9Sstevel@tonic-gate (tipif->ipif_flags & IPIF_UP) && 192545916cd2Sjpk (tipif->ipif_zoneid == zoneid || 192645916cd2Sjpk tipif->ipif_zoneid == ALL_ZONES)) 19277c478bd9Sstevel@tonic-gate break; 19287c478bd9Sstevel@tonic-gate } 1929bd670b35SErik Nordmark mutex_exit(&dst_ill->ill_lock); 19307c478bd9Sstevel@tonic-gate if (tipif == NULL) { 19317c478bd9Sstevel@tonic-gate return (B_FALSE); 19327c478bd9Sstevel@tonic-gate } 19337c478bd9Sstevel@tonic-gate } 19347c478bd9Sstevel@tonic-gate } 19357c478bd9Sstevel@tonic-gate 1936bd670b35SErik Nordmark matchit: 1937e11c3f44Smeem if (match_flags & MATCH_IRE_ILL) { 1938bd670b35SErik Nordmark ire_ill = ire->ire_ill; 1939bd670b35SErik Nordmark 1940bd670b35SErik Nordmark /* 1941bd670b35SErik Nordmark * If asked to match an ill, we *must* match 1942bd670b35SErik Nordmark * on the ire_ill for ipmp test addresses, or 1943bd670b35SErik Nordmark * any of the ill in the group for data addresses. 1944bd670b35SErik Nordmark * If we don't, we may as well fail. 1945bd670b35SErik Nordmark * However, we need an exception for IRE_LOCALs to ensure 1946bd670b35SErik Nordmark * we loopback packets even sent to test addresses on different 1947bd670b35SErik Nordmark * interfaces in the group. 1948bd670b35SErik Nordmark */ 1949bd670b35SErik Nordmark if ((match_flags & MATCH_IRE_TESTHIDDEN) && 1950bd670b35SErik Nordmark !(ire->ire_type & IRE_LOCAL)) { 1951bd670b35SErik Nordmark if (ire->ire_ill != ill) 1952bd670b35SErik Nordmark return (B_FALSE); 1953bd670b35SErik Nordmark } else { 1954bd670b35SErik Nordmark match_flags &= ~MATCH_IRE_TESTHIDDEN; 1955bd670b35SErik Nordmark /* 1956bd670b35SErik Nordmark * We know that ill is not NULL, but ire_ill could be 1957bd670b35SErik Nordmark * NULL 1958bd670b35SErik Nordmark */ 1959bd670b35SErik Nordmark if (ire_ill == NULL || !IS_ON_SAME_LAN(ill, ire_ill)) 1960bd670b35SErik Nordmark return (B_FALSE); 1961bd670b35SErik Nordmark } 19627c478bd9Sstevel@tonic-gate } 19637c478bd9Sstevel@tonic-gate 19647c478bd9Sstevel@tonic-gate if ((ire->ire_addr == (addr & mask)) && 19657c478bd9Sstevel@tonic-gate ((!(match_flags & MATCH_IRE_GW)) || 19667c478bd9Sstevel@tonic-gate (ire->ire_gateway_addr == gateway)) && 1967bd670b35SErik Nordmark ((!(match_flags & MATCH_IRE_TYPE)) || (ire->ire_type & type)) && 1968bd670b35SErik Nordmark ((!(match_flags & MATCH_IRE_TESTHIDDEN)) || ire->ire_testhidden) && 1969bd670b35SErik Nordmark ((!(match_flags & MATCH_IRE_MASK)) || (ire->ire_mask == mask)) && 197045916cd2Sjpk ((!(match_flags & MATCH_IRE_SECATTR)) || 197145916cd2Sjpk (!is_system_labeled()) || 197245916cd2Sjpk (tsol_ire_match_gwattr(ire, tsl) == 0))) { 19737c478bd9Sstevel@tonic-gate /* We found the matched IRE */ 19747c478bd9Sstevel@tonic-gate return (B_TRUE); 19757c478bd9Sstevel@tonic-gate } 19767c478bd9Sstevel@tonic-gate return (B_FALSE); 19777c478bd9Sstevel@tonic-gate } 19787c478bd9Sstevel@tonic-gate 19797c478bd9Sstevel@tonic-gate /* 1980e11c3f44Smeem * Check if the IRE_LOCAL uses the same ill as another route would use. 1981aa2eaee6Snordmark * If there is no alternate route, or the alternate is a REJECT or BLACKHOLE, 1982aa2eaee6Snordmark * then we don't allow this IRE_LOCAL to be used. 1983bd670b35SErik Nordmark * We always return an IRE; will be RTF_REJECT if no route available. 1984bd670b35SErik Nordmark */ 1985bd670b35SErik Nordmark ire_t * 1986bd670b35SErik Nordmark ire_alt_local(ire_t *ire, zoneid_t zoneid, const ts_label_t *tsl, 1987bd670b35SErik Nordmark const ill_t *ill, uint_t *generationp) 1988bd670b35SErik Nordmark { 1989bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 1990bd670b35SErik Nordmark ire_t *alt_ire; 1991bd670b35SErik Nordmark uint_t ire_type; 1992bd670b35SErik Nordmark uint_t generation; 1993bd670b35SErik Nordmark uint_t match_flags; 1994bd670b35SErik Nordmark 1995bd670b35SErik Nordmark ASSERT(ire->ire_type & IRE_LOCAL); 1996bd670b35SErik Nordmark ASSERT(ire->ire_ill != NULL); 1997bd670b35SErik Nordmark 1998bd670b35SErik Nordmark /* 1999bd670b35SErik Nordmark * Need to match on everything but local. 2000bd670b35SErik Nordmark * This might result in the creation of a IRE_IF_CLONE for the 2001bd670b35SErik Nordmark * same address as the IRE_LOCAL when restrict_interzone_loopback is 2002bd670b35SErik Nordmark * set. ire_add_*() ensures that the IRE_IF_CLONE are tail inserted 2003bd670b35SErik Nordmark * to make sure the IRE_LOCAL is always found first. 2004bd670b35SErik Nordmark */ 2005bd670b35SErik Nordmark ire_type = (IRE_ONLINK | IRE_OFFLINK) & ~(IRE_LOCAL|IRE_LOOPBACK); 2006bd670b35SErik Nordmark match_flags = MATCH_IRE_TYPE | MATCH_IRE_SECATTR; 2007bd670b35SErik Nordmark if (ill != NULL) 2008bd670b35SErik Nordmark match_flags |= MATCH_IRE_ILL; 2009bd670b35SErik Nordmark 2010bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) { 2011bd670b35SErik Nordmark alt_ire = ire_route_recursive_v4(ire->ire_addr, ire_type, 2012bd670b35SErik Nordmark ill, zoneid, tsl, match_flags, B_TRUE, 0, ipst, NULL, NULL, 2013bd670b35SErik Nordmark &generation); 2014bd670b35SErik Nordmark } else { 2015bd670b35SErik Nordmark alt_ire = ire_route_recursive_v6(&ire->ire_addr_v6, ire_type, 2016bd670b35SErik Nordmark ill, zoneid, tsl, match_flags, B_TRUE, 0, ipst, NULL, NULL, 2017bd670b35SErik Nordmark &generation); 2018bd670b35SErik Nordmark } 2019bd670b35SErik Nordmark ASSERT(alt_ire != NULL); 2020bd670b35SErik Nordmark 2021bd670b35SErik Nordmark if (alt_ire->ire_ill == ire->ire_ill) { 2022bd670b35SErik Nordmark /* Going out the same ILL - ok to send to IRE_LOCAL */ 2023bd670b35SErik Nordmark ire_refrele(alt_ire); 2024bd670b35SErik Nordmark } else { 2025bd670b35SErik Nordmark /* Different ill - ignore IRE_LOCAL */ 2026bd670b35SErik Nordmark ire_refrele(ire); 2027bd670b35SErik Nordmark ire = alt_ire; 2028bd670b35SErik Nordmark if (generationp != NULL) 2029bd670b35SErik Nordmark *generationp = generation; 2030bd670b35SErik Nordmark } 2031bd670b35SErik Nordmark return (ire); 2032bd670b35SErik Nordmark } 2033bd670b35SErik Nordmark 2034bd670b35SErik Nordmark boolean_t 2035bd670b35SErik Nordmark ire_find_zoneid(struct radix_node *rn, void *arg) 2036bd670b35SErik Nordmark { 2037bd670b35SErik Nordmark struct rt_entry *rt = (struct rt_entry *)rn; 2038bd670b35SErik Nordmark irb_t *irb; 2039bd670b35SErik Nordmark ire_t *ire; 2040bd670b35SErik Nordmark ire_ftable_args_t *margs = arg; 2041bd670b35SErik Nordmark 2042bd670b35SErik Nordmark ASSERT(rt != NULL); 2043bd670b35SErik Nordmark 2044bd670b35SErik Nordmark irb = &rt->rt_irb; 2045bd670b35SErik Nordmark 2046bd670b35SErik Nordmark if (irb->irb_ire_cnt == 0) 2047bd670b35SErik Nordmark return (B_FALSE); 2048bd670b35SErik Nordmark 2049bd670b35SErik Nordmark rw_enter(&irb->irb_lock, RW_READER); 2050bd670b35SErik Nordmark for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 2051bd670b35SErik Nordmark if (IRE_IS_CONDEMNED(ire)) 2052bd670b35SErik Nordmark continue; 2053bd670b35SErik Nordmark 2054*188e1664SErik Nordmark if (!(ire->ire_type & IRE_INTERFACE)) 2055*188e1664SErik Nordmark continue; 2056*188e1664SErik Nordmark 2057bd670b35SErik Nordmark if (ire->ire_zoneid != ALL_ZONES && 2058bd670b35SErik Nordmark ire->ire_zoneid != margs->ift_zoneid) 2059bd670b35SErik Nordmark continue; 2060bd670b35SErik Nordmark 2061bd670b35SErik Nordmark if (margs->ift_ill != NULL && margs->ift_ill != ire->ire_ill) 2062bd670b35SErik Nordmark continue; 2063bd670b35SErik Nordmark 2064bd670b35SErik Nordmark if (is_system_labeled() && 2065bd670b35SErik Nordmark tsol_ire_match_gwattr(ire, margs->ift_tsl) != 0) 2066bd670b35SErik Nordmark continue; 2067bd670b35SErik Nordmark 2068bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 2069bd670b35SErik Nordmark return (B_TRUE); 2070bd670b35SErik Nordmark } 2071bd670b35SErik Nordmark rw_exit(&irb->irb_lock); 2072bd670b35SErik Nordmark return (B_FALSE); 2073bd670b35SErik Nordmark } 2074bd670b35SErik Nordmark 2075bd670b35SErik Nordmark /* 2076bd670b35SErik Nordmark * Check if the zoneid (not ALL_ZONES) has an IRE_INTERFACE for the specified 2077bd670b35SErik Nordmark * gateway address. If ill is non-NULL we also match on it. 2078bd670b35SErik Nordmark * The caller must hold a read lock on RADIX_NODE_HEAD if lock_held is set. 20795597b60aSnordmark */ 20805597b60aSnordmark boolean_t 2081bd670b35SErik Nordmark ire_gateway_ok_zone_v4(ipaddr_t gateway, zoneid_t zoneid, ill_t *ill, 2082bd670b35SErik Nordmark const ts_label_t *tsl, ip_stack_t *ipst, boolean_t lock_held) 20835597b60aSnordmark { 2084bd670b35SErik Nordmark struct rt_sockaddr rdst; 2085bd670b35SErik Nordmark struct rt_entry *rt; 2086bd670b35SErik Nordmark ire_ftable_args_t margs; 2087e11c3f44Smeem 2088bd670b35SErik Nordmark ASSERT(ill == NULL || !ill->ill_isv6); 2089bd670b35SErik Nordmark if (lock_held) 2090bd670b35SErik Nordmark ASSERT(RW_READ_HELD(&ipst->ips_ip_ftable->rnh_lock)); 20917c478bd9Sstevel@tonic-gate else 2092bd670b35SErik Nordmark RADIX_NODE_HEAD_RLOCK(ipst->ips_ip_ftable); 2093bd670b35SErik Nordmark 2094*188e1664SErik Nordmark bzero(&rdst, sizeof (rdst)); 2095bd670b35SErik Nordmark rdst.rt_sin_len = sizeof (rdst); 2096bd670b35SErik Nordmark rdst.rt_sin_family = AF_INET; 2097bd670b35SErik Nordmark rdst.rt_sin_addr.s_addr = gateway; 2098bd670b35SErik Nordmark 2099bd670b35SErik Nordmark /* 2100bd670b35SErik Nordmark * We only use margs for ill, zoneid, and tsl matching in 2101bd670b35SErik Nordmark * ire_find_zoneid 2102bd670b35SErik Nordmark */ 2103*188e1664SErik Nordmark bzero(&margs, sizeof (margs)); 2104bd670b35SErik Nordmark margs.ift_ill = ill; 2105bd670b35SErik Nordmark margs.ift_zoneid = zoneid; 2106bd670b35SErik Nordmark margs.ift_tsl = tsl; 2107bd670b35SErik Nordmark rt = (struct rt_entry *)ipst->ips_ip_ftable->rnh_matchaddr_args(&rdst, 2108bd670b35SErik Nordmark ipst->ips_ip_ftable, ire_find_zoneid, (void *)&margs); 2109bd670b35SErik Nordmark 2110bd670b35SErik Nordmark if (!lock_held) 2111bd670b35SErik Nordmark RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 2112bd670b35SErik Nordmark 2113bd670b35SErik Nordmark return (rt != NULL); 21147c478bd9Sstevel@tonic-gate } 21157c478bd9Sstevel@tonic-gate 21167c478bd9Sstevel@tonic-gate /* 2117bd670b35SErik Nordmark * ire_walk routine to delete a fraction of redirect IREs and IRE_CLONE_IF IREs. 2118bd670b35SErik Nordmark * The fraction argument tells us what fraction of the IREs to delete. 2119bd670b35SErik Nordmark * Common for IPv4 and IPv6. 2120bd670b35SErik Nordmark * Used when memory backpressure. 21217c478bd9Sstevel@tonic-gate */ 2122bd670b35SErik Nordmark static void 2123bd670b35SErik Nordmark ire_delete_reclaim(ire_t *ire, char *arg) 21247c478bd9Sstevel@tonic-gate { 2125bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 2126bd670b35SErik Nordmark uint_t fraction = *(uint_t *)arg; 21277c478bd9Sstevel@tonic-gate uint_t rand; 21287c478bd9Sstevel@tonic-gate 2129bd670b35SErik Nordmark if ((ire->ire_flags & RTF_DYNAMIC) || 2130bd670b35SErik Nordmark (ire->ire_type & IRE_IF_CLONE)) { 21317c478bd9Sstevel@tonic-gate 2132bd670b35SErik Nordmark /* Pick a random number */ 2133d3d50737SRafael Vanoni rand = (uint_t)ddi_get_lbolt() + 2134bd670b35SErik Nordmark IRE_ADDR_HASH_V6(ire->ire_addr_v6, 256); 2135bd670b35SErik Nordmark 2136bd670b35SErik Nordmark /* Use truncation */ 2137bd670b35SErik Nordmark if ((rand/fraction)*fraction == rand) { 2138bd670b35SErik Nordmark IP_STAT(ipst, ip_ire_reclaim_deleted); 21397c478bd9Sstevel@tonic-gate ire_delete(ire); 21407c478bd9Sstevel@tonic-gate } 21417c478bd9Sstevel@tonic-gate } 2142bd670b35SErik Nordmark 21437c478bd9Sstevel@tonic-gate } 2144bd670b35SErik Nordmark 21457c478bd9Sstevel@tonic-gate /* 2146bd670b35SErik Nordmark * kmem_cache callback to free up memory. 2147bd670b35SErik Nordmark * 2148bd670b35SErik Nordmark * Free a fraction (ips_ip_ire_reclaim_fraction) of things IP added dynamically 2149bd670b35SErik Nordmark * (RTF_DYNAMIC and IRE_IF_CLONE). 21507c478bd9Sstevel@tonic-gate */ 2151bd670b35SErik Nordmark static void 2152bd670b35SErik Nordmark ip_ire_reclaim_stack(ip_stack_t *ipst) 2153bd670b35SErik Nordmark { 2154bd670b35SErik Nordmark uint_t fraction = ipst->ips_ip_ire_reclaim_fraction; 2155bd670b35SErik Nordmark 2156bd670b35SErik Nordmark IP_STAT(ipst, ip_ire_reclaim_calls); 2157bd670b35SErik Nordmark 2158bd670b35SErik Nordmark ire_walk(ire_delete_reclaim, &fraction, ipst); 2159bd670b35SErik Nordmark 2160bd670b35SErik Nordmark /* 2161bd670b35SErik Nordmark * Walk all CONNs that can have a reference on an ire, nce or dce. 2162bd670b35SErik Nordmark * Get them to update any stale references to drop any refholds they 2163bd670b35SErik Nordmark * have. 2164bd670b35SErik Nordmark */ 2165bd670b35SErik Nordmark ipcl_walk(conn_ixa_cleanup, (void *)B_FALSE, ipst); 2166bd670b35SErik Nordmark } 2167bd670b35SErik Nordmark 2168bd670b35SErik Nordmark /* 2169bd670b35SErik Nordmark * Called by the memory allocator subsystem directly, when the system 2170bd670b35SErik Nordmark * is running low on memory. 2171bd670b35SErik Nordmark */ 2172bd670b35SErik Nordmark /* ARGSUSED */ 2173bd670b35SErik Nordmark void 2174bd670b35SErik Nordmark ip_ire_reclaim(void *args) 2175bd670b35SErik Nordmark { 2176bd670b35SErik Nordmark netstack_handle_t nh; 2177bd670b35SErik Nordmark netstack_t *ns; 2178bd670b35SErik Nordmark 2179bd670b35SErik Nordmark netstack_next_init(&nh); 2180bd670b35SErik Nordmark while ((ns = netstack_next(&nh)) != NULL) { 2181bd670b35SErik Nordmark ip_ire_reclaim_stack(ns->netstack_ip); 2182bd670b35SErik Nordmark netstack_rele(ns); 2183bd670b35SErik Nordmark } 2184bd670b35SErik Nordmark netstack_next_fini(&nh); 21857c478bd9Sstevel@tonic-gate } 21867c478bd9Sstevel@tonic-gate 21877c478bd9Sstevel@tonic-gate static void 21887c478bd9Sstevel@tonic-gate power2_roundup(uint32_t *value) 21897c478bd9Sstevel@tonic-gate { 21907c478bd9Sstevel@tonic-gate int i; 21917c478bd9Sstevel@tonic-gate 21927c478bd9Sstevel@tonic-gate for (i = 1; i < 31; i++) { 21937c478bd9Sstevel@tonic-gate if (*value <= (1 << i)) 21947c478bd9Sstevel@tonic-gate break; 21957c478bd9Sstevel@tonic-gate } 21967c478bd9Sstevel@tonic-gate *value = (1 << i); 21977c478bd9Sstevel@tonic-gate } 21987c478bd9Sstevel@tonic-gate 2199f4b3ec61Sdh155122 /* Global init for all zones */ 22007c478bd9Sstevel@tonic-gate void 2201f4b3ec61Sdh155122 ip_ire_g_init() 22027c478bd9Sstevel@tonic-gate { 22037c478bd9Sstevel@tonic-gate /* 2204bd670b35SErik Nordmark * Create kmem_caches. ip_ire_reclaim() and ip_nce_reclaim() 2205bd670b35SErik Nordmark * will give disposable IREs back to system when needed. 22067c478bd9Sstevel@tonic-gate * This needs to be done here before anything else, since 22077c478bd9Sstevel@tonic-gate * ire_add() expects the cache to be created. 22087c478bd9Sstevel@tonic-gate */ 22097c478bd9Sstevel@tonic-gate ire_cache = kmem_cache_create("ire_cache", 2210bd670b35SErik Nordmark sizeof (ire_t), 0, NULL, NULL, 2211bd670b35SErik Nordmark ip_ire_reclaim, NULL, NULL, 0); 2212bd670b35SErik Nordmark 2213bd670b35SErik Nordmark ncec_cache = kmem_cache_create("ncec_cache", 2214bd670b35SErik Nordmark sizeof (ncec_t), 0, NULL, NULL, 2215bd670b35SErik Nordmark ip_nce_reclaim, NULL, NULL, 0); 2216bd670b35SErik Nordmark nce_cache = kmem_cache_create("nce_cache", 2217bd670b35SErik Nordmark sizeof (nce_t), 0, NULL, NULL, 2218bd670b35SErik Nordmark NULL, NULL, NULL, 0); 22197c478bd9Sstevel@tonic-gate 2220f4b3ec61Sdh155122 rt_entry_cache = kmem_cache_create("rt_entry", 2221f4b3ec61Sdh155122 sizeof (struct rt_entry), 0, NULL, NULL, NULL, NULL, NULL, 0); 2222f4b3ec61Sdh155122 2223f4b3ec61Sdh155122 /* 2224f4b3ec61Sdh155122 * Have radix code setup kmem caches etc. 2225f4b3ec61Sdh155122 */ 2226f4b3ec61Sdh155122 rn_init(); 2227f4b3ec61Sdh155122 } 2228f4b3ec61Sdh155122 2229f4b3ec61Sdh155122 void 2230f4b3ec61Sdh155122 ip_ire_init(ip_stack_t *ipst) 2231f4b3ec61Sdh155122 { 2232bd670b35SErik Nordmark ire_t *ire; 2233bd670b35SErik Nordmark int error; 2234f4b3ec61Sdh155122 2235f4b3ec61Sdh155122 mutex_init(&ipst->ips_ire_ft_init_lock, NULL, MUTEX_DEFAULT, 0); 2236f4b3ec61Sdh155122 2237f4b3ec61Sdh155122 (void) rn_inithead((void **)&ipst->ips_ip_ftable, 32); 2238f4b3ec61Sdh155122 22397c478bd9Sstevel@tonic-gate /* 22407c478bd9Sstevel@tonic-gate * Make sure that the forwarding table size is a power of 2. 22417c478bd9Sstevel@tonic-gate * The IRE*_ADDR_HASH() macroes depend on that. 22427c478bd9Sstevel@tonic-gate */ 2243f4b3ec61Sdh155122 ipst->ips_ip6_ftable_hash_size = ip6_ftable_hash_size; 2244f4b3ec61Sdh155122 power2_roundup(&ipst->ips_ip6_ftable_hash_size); 2245f4b3ec61Sdh155122 2246bd670b35SErik Nordmark /* 2247bd670b35SErik Nordmark * Allocate/initialize a pair of IRE_NOROUTEs for each of IPv4 and IPv6. 2248bd670b35SErik Nordmark * The ire_reject_v* has RTF_REJECT set, and the ire_blackhole_v* has 2249bd670b35SErik Nordmark * RTF_BLACKHOLE set. We use the latter for transient errors such 2250bd670b35SErik Nordmark * as memory allocation failures and tripping on IRE_IS_CONDEMNED 2251bd670b35SErik Nordmark * entries. 2252bd670b35SErik Nordmark */ 2253bd670b35SErik Nordmark ire = kmem_cache_alloc(ire_cache, KM_SLEEP); 2254bd670b35SErik Nordmark *ire = ire_null; 2255bd670b35SErik Nordmark error = ire_init_v4(ire, 0, 0, 0, IRE_NOROUTE, NULL, ALL_ZONES, 2256bd670b35SErik Nordmark RTF_REJECT|RTF_UP, NULL, ipst); 2257bd670b35SErik Nordmark ASSERT(error == 0); 2258bd670b35SErik Nordmark ipst->ips_ire_reject_v4 = ire; 2259bd670b35SErik Nordmark 2260bd670b35SErik Nordmark ire = kmem_cache_alloc(ire_cache, KM_SLEEP); 2261bd670b35SErik Nordmark *ire = ire_null; 2262bd670b35SErik Nordmark error = ire_init_v6(ire, 0, 0, 0, IRE_NOROUTE, NULL, ALL_ZONES, 2263bd670b35SErik Nordmark RTF_REJECT|RTF_UP, NULL, ipst); 2264bd670b35SErik Nordmark ASSERT(error == 0); 2265bd670b35SErik Nordmark ipst->ips_ire_reject_v6 = ire; 2266bd670b35SErik Nordmark 2267bd670b35SErik Nordmark ire = kmem_cache_alloc(ire_cache, KM_SLEEP); 2268bd670b35SErik Nordmark *ire = ire_null; 2269bd670b35SErik Nordmark error = ire_init_v4(ire, 0, 0, 0, IRE_NOROUTE, NULL, ALL_ZONES, 2270bd670b35SErik Nordmark RTF_BLACKHOLE|RTF_UP, NULL, ipst); 2271bd670b35SErik Nordmark ASSERT(error == 0); 2272bd670b35SErik Nordmark ipst->ips_ire_blackhole_v4 = ire; 2273bd670b35SErik Nordmark 2274bd670b35SErik Nordmark ire = kmem_cache_alloc(ire_cache, KM_SLEEP); 2275bd670b35SErik Nordmark *ire = ire_null; 2276bd670b35SErik Nordmark error = ire_init_v6(ire, 0, 0, 0, IRE_NOROUTE, NULL, ALL_ZONES, 2277bd670b35SErik Nordmark RTF_BLACKHOLE|RTF_UP, NULL, ipst); 2278bd670b35SErik Nordmark ASSERT(error == 0); 2279bd670b35SErik Nordmark ipst->ips_ire_blackhole_v6 = ire; 2280bd670b35SErik Nordmark 2281bd670b35SErik Nordmark rw_init(&ipst->ips_ip6_ire_head_lock, NULL, RW_DEFAULT, NULL); 2282bd670b35SErik Nordmark rw_init(&ipst->ips_ire_dep_lock, NULL, RW_DEFAULT, NULL); 22837c478bd9Sstevel@tonic-gate } 22847c478bd9Sstevel@tonic-gate 22857c478bd9Sstevel@tonic-gate void 2286f4b3ec61Sdh155122 ip_ire_g_fini(void) 2287f4b3ec61Sdh155122 { 2288f4b3ec61Sdh155122 kmem_cache_destroy(ire_cache); 2289bd670b35SErik Nordmark kmem_cache_destroy(ncec_cache); 2290bd670b35SErik Nordmark kmem_cache_destroy(nce_cache); 2291f4b3ec61Sdh155122 kmem_cache_destroy(rt_entry_cache); 2292f4b3ec61Sdh155122 2293f4b3ec61Sdh155122 rn_fini(); 2294f4b3ec61Sdh155122 } 2295f4b3ec61Sdh155122 2296f4b3ec61Sdh155122 void 2297f4b3ec61Sdh155122 ip_ire_fini(ip_stack_t *ipst) 22987c478bd9Sstevel@tonic-gate { 22997c478bd9Sstevel@tonic-gate int i; 23007c478bd9Sstevel@tonic-gate 2301bd670b35SErik Nordmark rw_destroy(&ipst->ips_ire_dep_lock); 2302bd670b35SErik Nordmark rw_destroy(&ipst->ips_ip6_ire_head_lock); 2303bd670b35SErik Nordmark 2304bd670b35SErik Nordmark ire_refrele_notr(ipst->ips_ire_reject_v6); 2305bd670b35SErik Nordmark ipst->ips_ire_reject_v6 = NULL; 2306bd670b35SErik Nordmark ire_refrele_notr(ipst->ips_ire_reject_v4); 2307bd670b35SErik Nordmark ipst->ips_ire_reject_v4 = NULL; 2308bd670b35SErik Nordmark ire_refrele_notr(ipst->ips_ire_blackhole_v6); 2309bd670b35SErik Nordmark ipst->ips_ire_blackhole_v6 = NULL; 2310bd670b35SErik Nordmark ire_refrele_notr(ipst->ips_ire_blackhole_v4); 2311bd670b35SErik Nordmark ipst->ips_ire_blackhole_v4 = NULL; 2312bd670b35SErik Nordmark 2313f4b3ec61Sdh155122 /* 2314f4b3ec61Sdh155122 * Delete all IREs - assumes that the ill/ipifs have 2315bd670b35SErik Nordmark * been removed so what remains are just the ftable to handle. 2316f4b3ec61Sdh155122 */ 2317f4b3ec61Sdh155122 ire_walk(ire_delete, NULL, ipst); 2318c793af95Ssangeeta 2319f4b3ec61Sdh155122 rn_freehead(ipst->ips_ip_ftable); 2320f4b3ec61Sdh155122 ipst->ips_ip_ftable = NULL; 23217c478bd9Sstevel@tonic-gate 2322f4b3ec61Sdh155122 mutex_destroy(&ipst->ips_ire_ft_init_lock); 23237c478bd9Sstevel@tonic-gate 2324f4b3ec61Sdh155122 for (i = 0; i < IP6_MASK_TABLE_SIZE; i++) { 2325f4b3ec61Sdh155122 irb_t *ptr; 2326f4b3ec61Sdh155122 int j; 2327f4b3ec61Sdh155122 2328f4b3ec61Sdh155122 if ((ptr = ipst->ips_ip_forwarding_table_v6[i]) == NULL) 2329f4b3ec61Sdh155122 continue; 2330f4b3ec61Sdh155122 2331f4b3ec61Sdh155122 for (j = 0; j < ipst->ips_ip6_ftable_hash_size; j++) { 2332f4b3ec61Sdh155122 ASSERT(ptr[j].irb_ire == NULL); 2333f4b3ec61Sdh155122 rw_destroy(&ptr[j].irb_lock); 2334f4b3ec61Sdh155122 } 2335f4b3ec61Sdh155122 mi_free(ptr); 2336f4b3ec61Sdh155122 ipst->ips_ip_forwarding_table_v6[i] = NULL; 2337f4b3ec61Sdh155122 } 23387c478bd9Sstevel@tonic-gate } 23397c478bd9Sstevel@tonic-gate 23406a8288c7Scarlsonj #ifdef DEBUG 23417c478bd9Sstevel@tonic-gate void 23427c478bd9Sstevel@tonic-gate ire_trace_ref(ire_t *ire) 23437c478bd9Sstevel@tonic-gate { 23447c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 23456a8288c7Scarlsonj if (ire->ire_trace_disable) { 23467c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 23477c478bd9Sstevel@tonic-gate return; 23487c478bd9Sstevel@tonic-gate } 23496a8288c7Scarlsonj 23506a8288c7Scarlsonj if (th_trace_ref(ire, ire->ire_ipst)) { 23516a8288c7Scarlsonj mutex_exit(&ire->ire_lock); 23526a8288c7Scarlsonj } else { 23537c478bd9Sstevel@tonic-gate ire->ire_trace_disable = B_TRUE; 23547c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 23556a8288c7Scarlsonj ire_trace_cleanup(ire); 23567c478bd9Sstevel@tonic-gate } 23577c478bd9Sstevel@tonic-gate } 23587c478bd9Sstevel@tonic-gate 23597c478bd9Sstevel@tonic-gate void 23607c478bd9Sstevel@tonic-gate ire_untrace_ref(ire_t *ire) 23617c478bd9Sstevel@tonic-gate { 23627c478bd9Sstevel@tonic-gate mutex_enter(&ire->ire_lock); 23636a8288c7Scarlsonj if (!ire->ire_trace_disable) 23646a8288c7Scarlsonj th_trace_unref(ire); 23657c478bd9Sstevel@tonic-gate mutex_exit(&ire->ire_lock); 23667c478bd9Sstevel@tonic-gate } 23677c478bd9Sstevel@tonic-gate 23687c478bd9Sstevel@tonic-gate static void 23696a8288c7Scarlsonj ire_trace_cleanup(const ire_t *ire) 23707c478bd9Sstevel@tonic-gate { 23716a8288c7Scarlsonj th_trace_cleanup(ire, ire->ire_trace_disable); 23727c478bd9Sstevel@tonic-gate } 23736a8288c7Scarlsonj #endif /* DEBUG */ 2374c793af95Ssangeeta 2375c793af95Ssangeeta /* 2376bd670b35SErik Nordmark * Find, or create if needed, the nce_t pointer to the neighbor cache 2377bd670b35SErik Nordmark * entry ncec_t for an IPv4 address. The nce_t will be created on the ill_t 2378bd670b35SErik Nordmark * in the non-IPMP case, or on the cast-ill in the IPMP bcast/mcast case, or 2379bd670b35SErik Nordmark * on the next available under-ill (selected by the IPMP rotor) in the 2380bd670b35SErik Nordmark * unicast IPMP case. 238154da8755Ssowmini * 238254da8755Ssowmini * If a neighbor-cache entry has to be created (i.e., one does not already 2383bd670b35SErik Nordmark * exist in the nce list) the ncec_lladdr and ncec_state of the neighbor cache 2384bd670b35SErik Nordmark * entry are initialized in nce_add_v4(). The broadcast, multicast, and 2385bd670b35SErik Nordmark * link-layer type determine the contents of {ncec_state, ncec_lladdr} of 2386bd670b35SErik Nordmark * the ncec_t created. The ncec_lladdr is non-null for all link types with 2387bd670b35SErik Nordmark * non-zero ill_phys_addr_length, though the contents may be zero in cases 2388bd670b35SErik Nordmark * where the link-layer type is not known at the time of creation 2389bd670b35SErik Nordmark * (e.g., IRE_IFRESOLVER links) 2390bd670b35SErik Nordmark * 2391bd670b35SErik Nordmark * All IRE_BROADCAST entries have ncec_state = ND_REACHABLE, and the nce_lladr 2392bd670b35SErik Nordmark * has the physical broadcast address of the outgoing interface. 2393bd670b35SErik Nordmark * For unicast ire entries, 239454da8755Ssowmini * - if the outgoing interface is of type IRE_IF_RESOLVER, a newly created 2395bd670b35SErik Nordmark * ncec_t with 0 nce_lladr contents, and will be in the ND_INITIAL state. 239654da8755Ssowmini * - if the outgoing interface is a IRE_IF_NORESOLVER interface, no link 2397bd670b35SErik Nordmark * layer resolution is necessary, so that the ncec_t will be in the 2398bd670b35SErik Nordmark * ND_REACHABLE state 239954da8755Ssowmini * 240054da8755Ssowmini * The link layer information needed for broadcast addresses, and for 240154da8755Ssowmini * packets sent on IRE_IF_NORESOLVER interfaces is a constant mapping that 2402bd670b35SErik Nordmark * never needs re-verification for the lifetime of the ncec_t. These are 2403bd670b35SErik Nordmark * therefore marked NCE_F_NONUD. 240454da8755Ssowmini * 2405bd670b35SErik Nordmark * The nce returned will be created such that the nce_ill == ill that 2406bd670b35SErik Nordmark * is passed in. Note that the nce itself may not have ncec_ill == ill 2407bd670b35SErik Nordmark * where IPMP links are involved. 2408c793af95Ssangeeta */ 2409bd670b35SErik Nordmark static nce_t * 2410bd670b35SErik Nordmark ire_nce_init(ill_t *ill, const void *addr, int ire_type) 2411c793af95Ssangeeta { 2412c793af95Ssangeeta int err; 241354da8755Ssowmini nce_t *nce = NULL; 2414bd670b35SErik Nordmark uint16_t ncec_flags; 2415bd670b35SErik Nordmark uchar_t *hwaddr; 2416bd670b35SErik Nordmark boolean_t need_refrele = B_FALSE; 2417bd670b35SErik Nordmark ill_t *in_ill = ill; 2418bd670b35SErik Nordmark boolean_t is_unicast; 2419bd670b35SErik Nordmark uint_t hwaddr_len; 2420c793af95Ssangeeta 2421bd670b35SErik Nordmark is_unicast = ((ire_type & (IRE_MULTICAST|IRE_BROADCAST)) == 0); 2422bd670b35SErik Nordmark if (IS_IPMP(ill) || 2423bd670b35SErik Nordmark ((ire_type & IRE_BROADCAST) && IS_UNDER_IPMP(ill))) { 2424bd670b35SErik Nordmark if ((ill = ipmp_ill_get_xmit_ill(ill, is_unicast)) == NULL) 2425bd670b35SErik Nordmark return (NULL); 2426bd670b35SErik Nordmark need_refrele = B_TRUE; 2427bd670b35SErik Nordmark } 2428bd670b35SErik Nordmark ncec_flags = (ill->ill_flags & ILLF_NONUD) ? NCE_F_NONUD : 0; 2429c793af95Ssangeeta 2430bd670b35SErik Nordmark switch (ire_type) { 2431c793af95Ssangeeta case IRE_BROADCAST: 2432bd670b35SErik Nordmark ASSERT(!ill->ill_isv6); 2433bd670b35SErik Nordmark ncec_flags |= (NCE_F_BCAST|NCE_F_NONUD); 2434c793af95Ssangeeta break; 2435bd670b35SErik Nordmark case IRE_MULTICAST: 2436bd670b35SErik Nordmark ncec_flags |= (NCE_F_MCAST|NCE_F_NONUD); 2437bd670b35SErik Nordmark break; 2438c793af95Ssangeeta } 2439c793af95Ssangeeta 2440bd670b35SErik Nordmark if (ill->ill_net_type == IRE_IF_NORESOLVER && is_unicast) { 2441bd670b35SErik Nordmark hwaddr = ill->ill_dest_addr; 2442bd670b35SErik Nordmark } else { 2443bd670b35SErik Nordmark hwaddr = NULL; 2444b9c344b3Ssowmini } 2445bd670b35SErik Nordmark hwaddr_len = ill->ill_phys_addr_length; 2446b9c344b3Ssowmini 2447bd670b35SErik Nordmark retry: 2448bd670b35SErik Nordmark /* nce_state will be computed by nce_add_common() */ 2449bd670b35SErik Nordmark if (!ill->ill_isv6) { 2450bd670b35SErik Nordmark err = nce_lookup_then_add_v4(ill, hwaddr, hwaddr_len, addr, 2451bd670b35SErik Nordmark ncec_flags, ND_UNCHANGED, &nce); 2452bd670b35SErik Nordmark } else { 2453bd670b35SErik Nordmark err = nce_lookup_then_add_v6(ill, hwaddr, hwaddr_len, addr, 2454bd670b35SErik Nordmark ncec_flags, ND_UNCHANGED, &nce); 2455bd670b35SErik Nordmark } 2456c793af95Ssangeeta 2457c793af95Ssangeeta switch (err) { 2458c793af95Ssangeeta case 0: 2459bd670b35SErik Nordmark break; 2460c793af95Ssangeeta case EEXIST: 2461c793af95Ssangeeta /* 2462bd670b35SErik Nordmark * When subnets change or partially overlap what was once 2463bd670b35SErik Nordmark * a broadcast address could now be a unicast, or vice versa. 2464c793af95Ssangeeta */ 2465bd670b35SErik Nordmark if (((ncec_flags ^ nce->nce_common->ncec_flags) & 2466bd670b35SErik Nordmark NCE_F_BCAST) != 0) { 2467bd670b35SErik Nordmark ASSERT(!ill->ill_isv6); 2468bd670b35SErik Nordmark ncec_delete(nce->nce_common); 2469bd670b35SErik Nordmark nce_refrele(nce); 2470bd670b35SErik Nordmark goto retry; 2471bd670b35SErik Nordmark } 2472c793af95Ssangeeta break; 2473c793af95Ssangeeta default: 2474bd670b35SErik Nordmark DTRACE_PROBE2(nce__init__fail, ill_t *, ill, int, err); 2475bd670b35SErik Nordmark if (need_refrele) 2476bd670b35SErik Nordmark ill_refrele(ill); 2477bd670b35SErik Nordmark return (NULL); 2478c793af95Ssangeeta } 24799294ad19SSowmini Varadhan /* 2480bd670b35SErik Nordmark * If the ill was an under-ill of an IPMP group, we need to verify 2481bd670b35SErik Nordmark * that it is still active so that we select an active interface in 2482bd670b35SErik Nordmark * the group. However, since ipmp_ill_is_active ASSERTs for 2483bd670b35SErik Nordmark * IS_UNDER_IPMP(), we first need to verify that the ill is an 2484bd670b35SErik Nordmark * under-ill, and since this is being done in the data path, the 2485bd670b35SErik Nordmark * only way to ascertain this is by holding the ill_g_lock. 24869294ad19SSowmini Varadhan */ 2487bd670b35SErik Nordmark rw_enter(&ill->ill_ipst->ips_ill_g_lock, RW_READER); 2488bd670b35SErik Nordmark mutex_enter(&ill->ill_lock); 2489bd670b35SErik Nordmark mutex_enter(&ill->ill_phyint->phyint_lock); 2490bd670b35SErik Nordmark if (need_refrele && IS_UNDER_IPMP(ill) && !ipmp_ill_is_active(ill)) { 2491c793af95Ssangeeta /* 2492bd670b35SErik Nordmark * need_refrele implies that the under ill was selected by 2493bd670b35SErik Nordmark * ipmp_ill_get_xmit_ill() because either the in_ill was an 2494bd670b35SErik Nordmark * ipmp_ill, or we are sending a non-unicast packet on 2495bd670b35SErik Nordmark * an under_ill. However, when we get here, the ill selected by 2496bd670b35SErik Nordmark * ipmp_ill_get_xmit_ill was pulled out of the active set 2497bd670b35SErik Nordmark * (for unicast) or cast_ill nomination (for 2498bd670b35SErik Nordmark * !unicast) after it was picked as the outgoing ill. 2499bd670b35SErik Nordmark * We have to pick an active interface and/or cast_ill in the 2500bd670b35SErik Nordmark * group. 2501c793af95Ssangeeta */ 2502bd670b35SErik Nordmark mutex_exit(&ill->ill_phyint->phyint_lock); 2503bd670b35SErik Nordmark nce_delete(nce); 2504bd670b35SErik Nordmark mutex_exit(&ill->ill_lock); 2505bd670b35SErik Nordmark rw_exit(&ill->ill_ipst->ips_ill_g_lock); 2506bd670b35SErik Nordmark nce_refrele(nce); 2507bd670b35SErik Nordmark ill_refrele(ill); 2508bd670b35SErik Nordmark if ((ill = ipmp_ill_get_xmit_ill(in_ill, is_unicast)) == NULL) 2509bd670b35SErik Nordmark return (NULL); 2510bd670b35SErik Nordmark goto retry; 2511c793af95Ssangeeta } else { 2512bd670b35SErik Nordmark mutex_exit(&ill->ill_phyint->phyint_lock); 2513bd670b35SErik Nordmark mutex_exit(&ill->ill_lock); 2514bd670b35SErik Nordmark rw_exit(&ill->ill_ipst->ips_ill_g_lock); 2515bd670b35SErik Nordmark } 2516bd670b35SErik Nordmark done: 2517bd670b35SErik Nordmark ASSERT(nce->nce_ill == ill); 2518bd670b35SErik Nordmark if (need_refrele) 2519bd670b35SErik Nordmark ill_refrele(ill); 2520bd670b35SErik Nordmark return (nce); 2521bd670b35SErik Nordmark } 2522bd670b35SErik Nordmark 2523bd670b35SErik Nordmark nce_t * 2524bd670b35SErik Nordmark arp_nce_init(ill_t *ill, in_addr_t addr4, int ire_type) 2525bd670b35SErik Nordmark { 2526bd670b35SErik Nordmark return (ire_nce_init(ill, &addr4, ire_type)); 2527bd670b35SErik Nordmark } 2528bd670b35SErik Nordmark 2529bd670b35SErik Nordmark nce_t * 2530bd670b35SErik Nordmark ndp_nce_init(ill_t *ill, const in6_addr_t *addr6, int ire_type) 2531bd670b35SErik Nordmark { 2532bd670b35SErik Nordmark ASSERT((ire_type & IRE_BROADCAST) == 0); 2533bd670b35SErik Nordmark return (ire_nce_init(ill, addr6, ire_type)); 2534bd670b35SErik Nordmark } 2535bd670b35SErik Nordmark 2536bd670b35SErik Nordmark /* 2537bd670b35SErik Nordmark * The caller should hold irb_lock as a writer if the ire is in a bucket. 2538bd670b35SErik Nordmark */ 2539bd670b35SErik Nordmark void 2540bd670b35SErik Nordmark ire_make_condemned(ire_t *ire) 2541bd670b35SErik Nordmark { 2542bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 2543bd670b35SErik Nordmark 2544bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 2545bd670b35SErik Nordmark ASSERT(ire->ire_bucket == NULL || 2546bd670b35SErik Nordmark RW_WRITE_HELD(&ire->ire_bucket->irb_lock)); 2547bd670b35SErik Nordmark ASSERT(!IRE_IS_CONDEMNED(ire)); 2548bd670b35SErik Nordmark ire->ire_generation = IRE_GENERATION_CONDEMNED; 2549bd670b35SErik Nordmark /* Count how many condemned ires for kmem_cache callback */ 2550bd670b35SErik Nordmark atomic_add_32(&ipst->ips_num_ire_condemned, 1); 2551bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 2552bd670b35SErik Nordmark } 2553bd670b35SErik Nordmark 2554bd670b35SErik Nordmark /* 2555bd670b35SErik Nordmark * Increment the generation avoiding the special condemned value 2556bd670b35SErik Nordmark */ 2557bd670b35SErik Nordmark void 2558bd670b35SErik Nordmark ire_increment_generation(ire_t *ire) 2559bd670b35SErik Nordmark { 2560bd670b35SErik Nordmark uint_t generation; 2561bd670b35SErik Nordmark 2562bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 2563bd670b35SErik Nordmark /* 2564bd670b35SErik Nordmark * Even though the caller has a hold it can't prevent a concurrent 2565bd670b35SErik Nordmark * ire_delete marking the IRE condemned 2566bd670b35SErik Nordmark */ 2567bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(ire)) { 2568bd670b35SErik Nordmark generation = ire->ire_generation + 1; 2569bd670b35SErik Nordmark if (generation == IRE_GENERATION_CONDEMNED) 2570bd670b35SErik Nordmark generation = IRE_GENERATION_INITIAL; 2571bd670b35SErik Nordmark ASSERT(generation != IRE_GENERATION_VERIFY); 2572bd670b35SErik Nordmark ire->ire_generation = generation; 2573bd670b35SErik Nordmark } 2574bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 2575bd670b35SErik Nordmark } 2576bd670b35SErik Nordmark 2577bd670b35SErik Nordmark /* 2578bd670b35SErik Nordmark * Increment ire_generation on all the IRE_MULTICASTs 2579bd670b35SErik Nordmark * Used when the default multicast interface (as determined by 2580bd670b35SErik Nordmark * ill_lookup_multicast) might have changed. 2581bd670b35SErik Nordmark * 2582bd670b35SErik Nordmark * That includes the zoneid, IFF_ flags, the IPv6 scope of the address, and 2583bd670b35SErik Nordmark * ill unplumb. 2584bd670b35SErik Nordmark */ 2585bd670b35SErik Nordmark void 2586bd670b35SErik Nordmark ire_increment_multicast_generation(ip_stack_t *ipst, boolean_t isv6) 2587bd670b35SErik Nordmark { 2588bd670b35SErik Nordmark ill_t *ill; 2589bd670b35SErik Nordmark ill_walk_context_t ctx; 2590bd670b35SErik Nordmark 2591bd670b35SErik Nordmark rw_enter(&ipst->ips_ill_g_lock, RW_READER); 2592bd670b35SErik Nordmark if (isv6) 2593bd670b35SErik Nordmark ill = ILL_START_WALK_V6(&ctx, ipst); 2594bd670b35SErik Nordmark else 2595bd670b35SErik Nordmark ill = ILL_START_WALK_V4(&ctx, ipst); 2596bd670b35SErik Nordmark for (; ill != NULL; ill = ill_next(&ctx, ill)) { 2597bd670b35SErik Nordmark if (ILL_IS_CONDEMNED(ill)) 2598bd670b35SErik Nordmark continue; 2599bd670b35SErik Nordmark if (ill->ill_ire_multicast != NULL) 2600bd670b35SErik Nordmark ire_increment_generation(ill->ill_ire_multicast); 2601bd670b35SErik Nordmark } 2602bd670b35SErik Nordmark rw_exit(&ipst->ips_ill_g_lock); 2603bd670b35SErik Nordmark } 2604bd670b35SErik Nordmark 2605bd670b35SErik Nordmark /* 2606bd670b35SErik Nordmark * Return a held IRE_NOROUTE with RTF_REJECT set 2607bd670b35SErik Nordmark */ 2608bd670b35SErik Nordmark ire_t * 2609bd670b35SErik Nordmark ire_reject(ip_stack_t *ipst, boolean_t isv6) 2610bd670b35SErik Nordmark { 2611bd670b35SErik Nordmark ire_t *ire; 2612bd670b35SErik Nordmark 2613bd670b35SErik Nordmark if (isv6) 2614bd670b35SErik Nordmark ire = ipst->ips_ire_reject_v6; 2615bd670b35SErik Nordmark else 2616bd670b35SErik Nordmark ire = ipst->ips_ire_reject_v4; 2617bd670b35SErik Nordmark 2618bd670b35SErik Nordmark ASSERT(ire->ire_generation != IRE_GENERATION_CONDEMNED); 2619bd670b35SErik Nordmark ire_refhold(ire); 2620bd670b35SErik Nordmark return (ire); 2621bd670b35SErik Nordmark } 2622bd670b35SErik Nordmark 2623bd670b35SErik Nordmark /* 2624bd670b35SErik Nordmark * Return a held IRE_NOROUTE with RTF_BLACKHOLE set 2625bd670b35SErik Nordmark */ 2626bd670b35SErik Nordmark ire_t * 2627bd670b35SErik Nordmark ire_blackhole(ip_stack_t *ipst, boolean_t isv6) 2628bd670b35SErik Nordmark { 2629bd670b35SErik Nordmark ire_t *ire; 2630bd670b35SErik Nordmark 2631bd670b35SErik Nordmark if (isv6) 2632bd670b35SErik Nordmark ire = ipst->ips_ire_blackhole_v6; 2633bd670b35SErik Nordmark else 2634bd670b35SErik Nordmark ire = ipst->ips_ire_blackhole_v4; 2635bd670b35SErik Nordmark 2636bd670b35SErik Nordmark ASSERT(ire->ire_generation != IRE_GENERATION_CONDEMNED); 2637bd670b35SErik Nordmark ire_refhold(ire); 2638bd670b35SErik Nordmark return (ire); 2639bd670b35SErik Nordmark } 2640bd670b35SErik Nordmark 2641bd670b35SErik Nordmark /* 2642bd670b35SErik Nordmark * Return a held IRE_MULTICAST. 2643bd670b35SErik Nordmark */ 2644bd670b35SErik Nordmark ire_t * 2645bd670b35SErik Nordmark ire_multicast(ill_t *ill) 2646bd670b35SErik Nordmark { 2647bd670b35SErik Nordmark ire_t *ire = ill->ill_ire_multicast; 2648bd670b35SErik Nordmark 2649bd670b35SErik Nordmark ASSERT(ire == NULL || ire->ire_generation != IRE_GENERATION_CONDEMNED); 2650bd670b35SErik Nordmark if (ire == NULL) 2651bd670b35SErik Nordmark ire = ire_blackhole(ill->ill_ipst, ill->ill_isv6); 2652bd670b35SErik Nordmark else 2653bd670b35SErik Nordmark ire_refhold(ire); 2654bd670b35SErik Nordmark return (ire); 2655bd670b35SErik Nordmark } 2656bd670b35SErik Nordmark 2657bd670b35SErik Nordmark /* 2658bd670b35SErik Nordmark * Given an IRE return its nexthop IRE. The nexthop IRE is an IRE_ONLINK 2659bd670b35SErik Nordmark * that is an exact match (i.e., a /32 for IPv4 and /128 for IPv6). 2660bd670b35SErik Nordmark * This can return an RTF_REJECT|RTF_BLACKHOLE. 2661bd670b35SErik Nordmark * The returned IRE is held. 2662bd670b35SErik Nordmark * The assumption is that ip_select_route() has been called and returned the 2663bd670b35SErik Nordmark * IRE (thus ip_select_route would have set up the ire_dep* information.) 2664bd670b35SErik Nordmark * If some IRE is deleteted then ire_dep_remove() will have been called and 2665bd670b35SErik Nordmark * we might not find a nexthop IRE, in which case we return NULL. 2666bd670b35SErik Nordmark */ 2667bd670b35SErik Nordmark ire_t * 2668bd670b35SErik Nordmark ire_nexthop(ire_t *ire) 2669bd670b35SErik Nordmark { 2670bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 2671bd670b35SErik Nordmark 2672bd670b35SErik Nordmark /* Acquire lock to walk ire_dep_parent */ 2673bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 2674bd670b35SErik Nordmark while (ire != NULL) { 2675bd670b35SErik Nordmark if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) { 2676bd670b35SErik Nordmark goto done; 26779294ad19SSowmini Varadhan } 2678c793af95Ssangeeta /* 2679bd670b35SErik Nordmark * If we find an IRE_ONLINK we are done. This includes 2680bd670b35SErik Nordmark * the case of IRE_MULTICAST. 2681bd670b35SErik Nordmark * Note that in order to send packets we need a host-specific 2682bd670b35SErik Nordmark * IRE_IF_ALL first in the ire_dep_parent chain. Normally this 2683bd670b35SErik Nordmark * is done by inserting an IRE_IF_CLONE if the IRE_INTERFACE 2684bd670b35SErik Nordmark * was not host specific. 2685bd670b35SErik Nordmark * However, ip_rts_request doesn't want to send packets 2686bd670b35SErik Nordmark * hence doesn't want to allocate an IRE_IF_CLONE. Yet 2687bd670b35SErik Nordmark * it needs an IRE_IF_ALL to get to the ill. Thus 2688bd670b35SErik Nordmark * we return IRE_IF_ALL that are not host specific here. 2689c793af95Ssangeeta */ 2690bd670b35SErik Nordmark if (ire->ire_type & IRE_ONLINK) 2691bd670b35SErik Nordmark goto done; 2692bd670b35SErik Nordmark ire = ire->ire_dep_parent; 2693c793af95Ssangeeta } 2694bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 2695bd670b35SErik Nordmark return (NULL); 2696bd670b35SErik Nordmark 2697bd670b35SErik Nordmark done: 2698bd670b35SErik Nordmark ire_refhold(ire); 2699bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 2700bd670b35SErik Nordmark return (ire); 2701bd670b35SErik Nordmark } 2702bd670b35SErik Nordmark 2703bd670b35SErik Nordmark /* 2704bd670b35SErik Nordmark * Find the ill used to send packets. This will be NULL in case 2705bd670b35SErik Nordmark * of a reject or blackhole. 2706bd670b35SErik Nordmark * The returned ill is held; caller needs to do ill_refrele when done. 2707bd670b35SErik Nordmark */ 2708bd670b35SErik Nordmark ill_t * 2709bd670b35SErik Nordmark ire_nexthop_ill(ire_t *ire) 2710bd670b35SErik Nordmark { 2711bd670b35SErik Nordmark ill_t *ill; 2712bd670b35SErik Nordmark 2713bd670b35SErik Nordmark ire = ire_nexthop(ire); 2714bd670b35SErik Nordmark if (ire == NULL) 2715bd670b35SErik Nordmark return (NULL); 2716bd670b35SErik Nordmark 2717bd670b35SErik Nordmark /* ire_ill can not change for an existing ire */ 2718bd670b35SErik Nordmark ill = ire->ire_ill; 2719bd670b35SErik Nordmark if (ill != NULL) 2720bd670b35SErik Nordmark ill_refhold(ill); 2721bd670b35SErik Nordmark ire_refrele(ire); 2722bd670b35SErik Nordmark return (ill); 2723bd670b35SErik Nordmark } 2724bd670b35SErik Nordmark 2725bd670b35SErik Nordmark #ifdef DEBUG 2726bd670b35SErik Nordmark static boolean_t 2727bd670b35SErik Nordmark parent_has_child(ire_t *parent, ire_t *child) 2728bd670b35SErik Nordmark { 2729bd670b35SErik Nordmark ire_t *ire; 2730bd670b35SErik Nordmark ire_t *prev; 2731bd670b35SErik Nordmark 2732bd670b35SErik Nordmark ire = parent->ire_dep_children; 2733bd670b35SErik Nordmark prev = NULL; 2734bd670b35SErik Nordmark while (ire != NULL) { 2735bd670b35SErik Nordmark if (prev == NULL) { 2736bd670b35SErik Nordmark ASSERT(ire->ire_dep_sib_ptpn == 2737bd670b35SErik Nordmark &(parent->ire_dep_children)); 2738bd670b35SErik Nordmark } else { 2739bd670b35SErik Nordmark ASSERT(ire->ire_dep_sib_ptpn == 2740bd670b35SErik Nordmark &(prev->ire_dep_sib_next)); 2741bd670b35SErik Nordmark } 2742bd670b35SErik Nordmark if (ire == child) 2743bd670b35SErik Nordmark return (B_TRUE); 2744bd670b35SErik Nordmark prev = ire; 2745bd670b35SErik Nordmark ire = ire->ire_dep_sib_next; 2746bd670b35SErik Nordmark } 2747bd670b35SErik Nordmark return (B_FALSE); 2748bd670b35SErik Nordmark } 2749bd670b35SErik Nordmark 2750bd670b35SErik Nordmark static void 2751bd670b35SErik Nordmark ire_dep_verify(ire_t *ire) 2752bd670b35SErik Nordmark { 2753bd670b35SErik Nordmark ire_t *parent = ire->ire_dep_parent; 2754bd670b35SErik Nordmark ire_t *child = ire->ire_dep_children; 2755bd670b35SErik Nordmark 2756bd670b35SErik Nordmark ASSERT(ire->ire_ipversion == IPV4_VERSION || 2757bd670b35SErik Nordmark ire->ire_ipversion == IPV6_VERSION); 2758bd670b35SErik Nordmark if (parent != NULL) { 2759bd670b35SErik Nordmark ASSERT(parent->ire_ipversion == IPV4_VERSION || 2760bd670b35SErik Nordmark parent->ire_ipversion == IPV6_VERSION); 2761bd670b35SErik Nordmark ASSERT(parent->ire_refcnt >= 1); 2762bd670b35SErik Nordmark ASSERT(parent_has_child(parent, ire)); 2763bd670b35SErik Nordmark } 2764bd670b35SErik Nordmark if (child != NULL) { 2765bd670b35SErik Nordmark ASSERT(child->ire_ipversion == IPV4_VERSION || 2766bd670b35SErik Nordmark child->ire_ipversion == IPV6_VERSION); 2767bd670b35SErik Nordmark ASSERT(child->ire_dep_parent == ire); 2768bd670b35SErik Nordmark ASSERT(child->ire_dep_sib_ptpn != NULL); 2769bd670b35SErik Nordmark ASSERT(parent_has_child(ire, child)); 2770bd670b35SErik Nordmark } 2771bd670b35SErik Nordmark } 2772bd670b35SErik Nordmark #endif /* DEBUG */ 2773bd670b35SErik Nordmark 2774bd670b35SErik Nordmark /* 2775bd670b35SErik Nordmark * Assumes ire_dep_parent is set. Remove this child from its parent's linkage. 2776bd670b35SErik Nordmark */ 2777bd670b35SErik Nordmark void 2778bd670b35SErik Nordmark ire_dep_remove(ire_t *ire) 2779bd670b35SErik Nordmark { 2780bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 2781bd670b35SErik Nordmark ire_t *parent = ire->ire_dep_parent; 2782bd670b35SErik Nordmark ire_t *next; 2783bd670b35SErik Nordmark nce_t *nce; 2784bd670b35SErik Nordmark 2785bd670b35SErik Nordmark ASSERT(RW_WRITE_HELD(&ipst->ips_ire_dep_lock)); 2786bd670b35SErik Nordmark ASSERT(ire->ire_dep_parent != NULL); 2787bd670b35SErik Nordmark ASSERT(ire->ire_dep_sib_ptpn != NULL); 2788bd670b35SErik Nordmark 2789bd670b35SErik Nordmark #ifdef DEBUG 2790bd670b35SErik Nordmark ire_dep_verify(ire); 2791bd670b35SErik Nordmark ire_dep_verify(parent); 2792bd670b35SErik Nordmark #endif 2793bd670b35SErik Nordmark 2794bd670b35SErik Nordmark next = ire->ire_dep_sib_next; 2795bd670b35SErik Nordmark if (next != NULL) 2796bd670b35SErik Nordmark next->ire_dep_sib_ptpn = ire->ire_dep_sib_ptpn; 2797bd670b35SErik Nordmark 2798bd670b35SErik Nordmark ASSERT(*(ire->ire_dep_sib_ptpn) == ire); 2799bd670b35SErik Nordmark *(ire->ire_dep_sib_ptpn) = ire->ire_dep_sib_next; 2800bd670b35SErik Nordmark 2801bd670b35SErik Nordmark ire->ire_dep_sib_ptpn = NULL; 2802bd670b35SErik Nordmark ire->ire_dep_sib_next = NULL; 2803bd670b35SErik Nordmark 2804bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 2805bd670b35SErik Nordmark parent = ire->ire_dep_parent; 2806bd670b35SErik Nordmark ire->ire_dep_parent = NULL; 2807bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 2808bd670b35SErik Nordmark 2809bd670b35SErik Nordmark /* 2810bd670b35SErik Nordmark * Make sure all our children, grandchildren, etc set 2811bd670b35SErik Nordmark * ire_dep_parent_generation to IRE_GENERATION_VERIFY since 2812bd670b35SErik Nordmark * we can no longer guarantee than the children have a current 2813bd670b35SErik Nordmark * ire_nce_cache and ire_nexthop_ill(). 2814bd670b35SErik Nordmark */ 2815bd670b35SErik Nordmark if (ire->ire_dep_children != NULL) 2816bd670b35SErik Nordmark ire_dep_invalidate_children(ire->ire_dep_children); 2817bd670b35SErik Nordmark 2818bd670b35SErik Nordmark /* 2819bd670b35SErik Nordmark * Since the parent is gone we make sure we clear ire_nce_cache. 2820bd670b35SErik Nordmark * We can clear it under ire_lock even if the IRE is used 2821bd670b35SErik Nordmark */ 2822bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 2823bd670b35SErik Nordmark nce = ire->ire_nce_cache; 2824bd670b35SErik Nordmark ire->ire_nce_cache = NULL; 2825bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 2826bd670b35SErik Nordmark if (nce != NULL) 2827bd670b35SErik Nordmark nce_refrele(nce); 2828bd670b35SErik Nordmark 2829bd670b35SErik Nordmark #ifdef DEBUG 2830bd670b35SErik Nordmark ire_dep_verify(ire); 2831bd670b35SErik Nordmark ire_dep_verify(parent); 2832bd670b35SErik Nordmark #endif 2833bd670b35SErik Nordmark 2834bd670b35SErik Nordmark ire_refrele_notr(parent); 2835bd670b35SErik Nordmark ire_refrele_notr(ire); 2836bd670b35SErik Nordmark } 2837bd670b35SErik Nordmark 2838bd670b35SErik Nordmark /* 2839bd670b35SErik Nordmark * Insert the child in the linkage of the parent 2840bd670b35SErik Nordmark */ 2841bd670b35SErik Nordmark static void 2842bd670b35SErik Nordmark ire_dep_parent_insert(ire_t *child, ire_t *parent) 2843bd670b35SErik Nordmark { 2844bd670b35SErik Nordmark ip_stack_t *ipst = child->ire_ipst; 2845bd670b35SErik Nordmark ire_t *next; 2846bd670b35SErik Nordmark 2847bd670b35SErik Nordmark ASSERT(RW_WRITE_HELD(&ipst->ips_ire_dep_lock)); 2848bd670b35SErik Nordmark ASSERT(child->ire_dep_parent == NULL); 2849bd670b35SErik Nordmark 2850bd670b35SErik Nordmark #ifdef DEBUG 2851bd670b35SErik Nordmark ire_dep_verify(child); 2852bd670b35SErik Nordmark ire_dep_verify(parent); 2853bd670b35SErik Nordmark #endif 2854bd670b35SErik Nordmark /* No parents => no siblings */ 2855bd670b35SErik Nordmark ASSERT(child->ire_dep_sib_ptpn == NULL); 2856bd670b35SErik Nordmark ASSERT(child->ire_dep_sib_next == NULL); 2857bd670b35SErik Nordmark 2858bd670b35SErik Nordmark ire_refhold_notr(parent); 2859bd670b35SErik Nordmark ire_refhold_notr(child); 2860bd670b35SErik Nordmark 2861bd670b35SErik Nordmark /* Head insertion */ 2862bd670b35SErik Nordmark next = parent->ire_dep_children; 2863bd670b35SErik Nordmark if (next != NULL) { 2864bd670b35SErik Nordmark ASSERT(next->ire_dep_sib_ptpn == &(parent->ire_dep_children)); 2865bd670b35SErik Nordmark child->ire_dep_sib_next = next; 2866bd670b35SErik Nordmark next->ire_dep_sib_ptpn = &(child->ire_dep_sib_next); 2867bd670b35SErik Nordmark } 2868bd670b35SErik Nordmark parent->ire_dep_children = child; 2869bd670b35SErik Nordmark child->ire_dep_sib_ptpn = &(parent->ire_dep_children); 2870bd670b35SErik Nordmark 2871bd670b35SErik Nordmark mutex_enter(&child->ire_lock); 2872bd670b35SErik Nordmark child->ire_dep_parent = parent; 2873bd670b35SErik Nordmark mutex_exit(&child->ire_lock); 2874bd670b35SErik Nordmark 2875bd670b35SErik Nordmark #ifdef DEBUG 2876bd670b35SErik Nordmark ire_dep_verify(child); 2877bd670b35SErik Nordmark ire_dep_verify(parent); 2878bd670b35SErik Nordmark #endif 2879bd670b35SErik Nordmark } 2880bd670b35SErik Nordmark 2881bd670b35SErik Nordmark 2882bd670b35SErik Nordmark /* 2883bd670b35SErik Nordmark * Given count worth of ires and generations, build ire_dep_* relationships 2884bd670b35SErik Nordmark * from ires[0] to ires[count-1]. Record generations[i+1] in 2885bd670b35SErik Nordmark * ire_dep_parent_generation for ires[i]. 2886bd670b35SErik Nordmark * We graft onto an existing parent chain by making sure that we don't 2887bd670b35SErik Nordmark * touch ire_dep_parent for ires[count-1]. 2888bd670b35SErik Nordmark * 2889bd670b35SErik Nordmark * We check for any condemned ire_generation count and return B_FALSE in 2890bd670b35SErik Nordmark * that case so that the caller can tear it apart. 2891bd670b35SErik Nordmark * 2892bd670b35SErik Nordmark * Note that generations[0] is not used. Caller handles that. 2893bd670b35SErik Nordmark */ 2894bd670b35SErik Nordmark boolean_t 2895bd670b35SErik Nordmark ire_dep_build(ire_t *ires[], uint_t generations[], uint_t count) 2896bd670b35SErik Nordmark { 2897bd670b35SErik Nordmark ire_t *ire = ires[0]; 2898bd670b35SErik Nordmark ip_stack_t *ipst; 2899bd670b35SErik Nordmark uint_t i; 2900bd670b35SErik Nordmark 2901bd670b35SErik Nordmark ASSERT(count > 0); 2902bd670b35SErik Nordmark if (count == 1) { 2903bd670b35SErik Nordmark /* No work to do */ 2904bd670b35SErik Nordmark return (B_TRUE); 2905bd670b35SErik Nordmark } 2906bd670b35SErik Nordmark ipst = ire->ire_ipst; 2907bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_WRITER); 2908bd670b35SErik Nordmark /* 2909bd670b35SErik Nordmark * Do not remove the linkage for any existing parent chain i.e., 2910bd670b35SErik Nordmark * ires[count-1] is left alone. 2911bd670b35SErik Nordmark */ 2912bd670b35SErik Nordmark for (i = 0; i < count-1; i++) { 2913bd670b35SErik Nordmark /* Remove existing parent if we need to change it */ 2914bd670b35SErik Nordmark if (ires[i]->ire_dep_parent != NULL && 2915bd670b35SErik Nordmark ires[i]->ire_dep_parent != ires[i+1]) 2916bd670b35SErik Nordmark ire_dep_remove(ires[i]); 2917bd670b35SErik Nordmark } 2918bd670b35SErik Nordmark 2919bd670b35SErik Nordmark for (i = 0; i < count - 1; i++) { 2920bd670b35SErik Nordmark ASSERT(ires[i]->ire_ipversion == IPV4_VERSION || 2921bd670b35SErik Nordmark ires[i]->ire_ipversion == IPV6_VERSION); 2922bd670b35SErik Nordmark /* Does it need to change? */ 2923bd670b35SErik Nordmark if (ires[i]->ire_dep_parent != ires[i+1]) 2924bd670b35SErik Nordmark ire_dep_parent_insert(ires[i], ires[i+1]); 2925bd670b35SErik Nordmark 2926bd670b35SErik Nordmark mutex_enter(&ires[i+1]->ire_lock); 2927bd670b35SErik Nordmark if (IRE_IS_CONDEMNED(ires[i+1])) { 2928bd670b35SErik Nordmark mutex_exit(&ires[i+1]->ire_lock); 2929bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 2930bd670b35SErik Nordmark return (B_FALSE); 2931bd670b35SErik Nordmark } 2932bd670b35SErik Nordmark mutex_exit(&ires[i+1]->ire_lock); 2933bd670b35SErik Nordmark 2934bd670b35SErik Nordmark mutex_enter(&ires[i]->ire_lock); 2935bd670b35SErik Nordmark ires[i]->ire_dep_parent_generation = generations[i+1]; 2936bd670b35SErik Nordmark mutex_exit(&ires[i]->ire_lock); 2937bd670b35SErik Nordmark } 2938bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 2939bd670b35SErik Nordmark return (B_TRUE); 2940bd670b35SErik Nordmark } 2941bd670b35SErik Nordmark 2942bd670b35SErik Nordmark /* 2943bd670b35SErik Nordmark * Given count worth of ires, unbuild ire_dep_* relationships 2944bd670b35SErik Nordmark * from ires[0] to ires[count-1]. 2945bd670b35SErik Nordmark */ 2946bd670b35SErik Nordmark void 2947bd670b35SErik Nordmark ire_dep_unbuild(ire_t *ires[], uint_t count) 2948bd670b35SErik Nordmark { 2949bd670b35SErik Nordmark ip_stack_t *ipst; 2950bd670b35SErik Nordmark uint_t i; 2951bd670b35SErik Nordmark 2952bd670b35SErik Nordmark if (count == 0) { 2953bd670b35SErik Nordmark /* No work to do */ 2954bd670b35SErik Nordmark return; 2955bd670b35SErik Nordmark } 2956bd670b35SErik Nordmark ipst = ires[0]->ire_ipst; 2957bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_WRITER); 2958bd670b35SErik Nordmark for (i = 0; i < count; i++) { 2959bd670b35SErik Nordmark ASSERT(ires[i]->ire_ipversion == IPV4_VERSION || 2960bd670b35SErik Nordmark ires[i]->ire_ipversion == IPV6_VERSION); 2961bd670b35SErik Nordmark if (ires[i]->ire_dep_parent != NULL) 2962bd670b35SErik Nordmark ire_dep_remove(ires[i]); 2963bd670b35SErik Nordmark mutex_enter(&ires[i]->ire_lock); 2964bd670b35SErik Nordmark ires[i]->ire_dep_parent_generation = IRE_GENERATION_VERIFY; 2965bd670b35SErik Nordmark mutex_exit(&ires[i]->ire_lock); 2966bd670b35SErik Nordmark } 2967bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 2968bd670b35SErik Nordmark } 2969bd670b35SErik Nordmark 2970bd670b35SErik Nordmark /* 2971bd670b35SErik Nordmark * Both the forwarding and the outbound code paths can trip on 2972bd670b35SErik Nordmark * a condemned NCE, in which case we call this function. 2973bd670b35SErik Nordmark * We have two different behaviors: if the NCE was UNREACHABLE 2974bd670b35SErik Nordmark * it is an indication that something failed. In that case 2975bd670b35SErik Nordmark * we see if we should look for a different IRE (for example, 2976bd670b35SErik Nordmark * delete any matching redirect IRE, or try a different 2977bd670b35SErik Nordmark * IRE_DEFAULT (ECMP)). We mark the ire as bad so a hopefully 2978bd670b35SErik Nordmark * different IRE will be picked next time we send/forward. 2979bd670b35SErik Nordmark * 2980bd670b35SErik Nordmark * If we are called by the output path then fail_if_better is set 2981bd670b35SErik Nordmark * and we return NULL if there could be a better IRE. This is because the 2982bd670b35SErik Nordmark * output path retries the IRE lookup. (The input/forward path can not retry.) 2983bd670b35SErik Nordmark * 2984bd670b35SErik Nordmark * If the NCE was not unreachable then we pick/allocate a 2985bd670b35SErik Nordmark * new (most likely ND_INITIAL) NCE and proceed with it. 2986bd670b35SErik Nordmark * 2987bd670b35SErik Nordmark * ipha/ip6h are needed for multicast packets; ipha needs to be 2988bd670b35SErik Nordmark * set for IPv4 and ip6h needs to be set for IPv6 packets. 2989bd670b35SErik Nordmark */ 2990bd670b35SErik Nordmark nce_t * 2991bd670b35SErik Nordmark ire_handle_condemned_nce(nce_t *nce, ire_t *ire, ipha_t *ipha, ip6_t *ip6h, 2992bd670b35SErik Nordmark boolean_t fail_if_better) 2993bd670b35SErik Nordmark { 2994bd670b35SErik Nordmark if (nce->nce_common->ncec_state == ND_UNREACHABLE) { 2995bd670b35SErik Nordmark if (ire_no_good(ire) && fail_if_better) { 2996bd670b35SErik Nordmark /* 2997bd670b35SErik Nordmark * Did some changes, or ECMP likely to exist. 2998bd670b35SErik Nordmark * Make ip_output look for a different IRE 2999bd670b35SErik Nordmark */ 3000bd670b35SErik Nordmark return (NULL); 3001bd670b35SErik Nordmark } 3002bd670b35SErik Nordmark } 3003bd670b35SErik Nordmark if (ire_revalidate_nce(ire) == ENETUNREACH) { 3004bd670b35SErik Nordmark /* The ire_dep_parent chain went bad, or no memory? */ 3005bd670b35SErik Nordmark (void) ire_no_good(ire); 3006bd670b35SErik Nordmark return (NULL); 3007bd670b35SErik Nordmark } 3008bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) { 3009bd670b35SErik Nordmark ASSERT(ipha != NULL); 3010bd670b35SErik Nordmark nce = ire_to_nce(ire, ipha->ipha_dst, NULL); 3011bd670b35SErik Nordmark } else { 3012bd670b35SErik Nordmark ASSERT(ip6h != NULL); 3013bd670b35SErik Nordmark nce = ire_to_nce(ire, INADDR_ANY, &ip6h->ip6_dst); 3014bd670b35SErik Nordmark } 3015bd670b35SErik Nordmark 3016bd670b35SErik Nordmark if (nce == NULL) 3017bd670b35SErik Nordmark return (NULL); 3018bd670b35SErik Nordmark if (nce->nce_is_condemned) { 3019bd670b35SErik Nordmark nce_refrele(nce); 3020bd670b35SErik Nordmark return (NULL); 3021bd670b35SErik Nordmark } 3022bd670b35SErik Nordmark return (nce); 3023bd670b35SErik Nordmark } 3024bd670b35SErik Nordmark 3025bd670b35SErik Nordmark /* 3026bd670b35SErik Nordmark * The caller has found that the ire is bad, either due to a reference to an NCE 3027bd670b35SErik Nordmark * in ND_UNREACHABLE state, or a MULTIRT route whose gateway can't be resolved. 3028bd670b35SErik Nordmark * We update things so a subsequent attempt to send to the destination 3029bd670b35SErik Nordmark * is likely to find different IRE, or that a new NCE would be created. 3030bd670b35SErik Nordmark * 3031bd670b35SErik Nordmark * Returns B_TRUE if it is likely that a subsequent ire_ftable_lookup would 3032bd670b35SErik Nordmark * find a different route (either due to having deleted a redirect, or there 3033bd670b35SErik Nordmark * being ECMP routes.) 3034bd670b35SErik Nordmark * 3035bd670b35SErik Nordmark * If we have a redirect (RTF_DYNAMIC) we delete it. 3036bd670b35SErik Nordmark * Otherwise we increment ire_badcnt and increment the generation number so 3037bd670b35SErik Nordmark * that a cached ixa_ire will redo the route selection. ire_badcnt is taken 3038bd670b35SErik Nordmark * into account in the route selection when we have multiple choices (multiple 3039bd670b35SErik Nordmark * default routes or ECMP in general). 3040bd670b35SErik Nordmark * Any time ip_select_route find an ire with a condemned ire_nce_cache 3041bd670b35SErik Nordmark * (e.g., if no equal cost route to the bad one) ip_select_route will make 3042bd670b35SErik Nordmark * sure the NCE is revalidated to avoid getting stuck on a 3043bd670b35SErik Nordmark * NCE_F_CONDMNED ncec that caused ire_no_good to be called. 3044bd670b35SErik Nordmark */ 3045bd670b35SErik Nordmark boolean_t 3046bd670b35SErik Nordmark ire_no_good(ire_t *ire) 3047bd670b35SErik Nordmark { 3048bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 3049bd670b35SErik Nordmark ire_t *ire2; 3050bd670b35SErik Nordmark nce_t *nce; 3051bd670b35SErik Nordmark 3052bd670b35SErik Nordmark if (ire->ire_flags & RTF_DYNAMIC) { 3053bd670b35SErik Nordmark ire_delete(ire); 3054bd670b35SErik Nordmark return (B_TRUE); 3055bd670b35SErik Nordmark } 3056bd670b35SErik Nordmark if (ire->ire_flags & RTF_INDIRECT) { 3057bd670b35SErik Nordmark /* Check if next IRE is a redirect */ 3058bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 3059bd670b35SErik Nordmark if (ire->ire_dep_parent != NULL && 3060bd670b35SErik Nordmark (ire->ire_dep_parent->ire_flags & RTF_DYNAMIC)) { 3061bd670b35SErik Nordmark ire2 = ire->ire_dep_parent; 3062bd670b35SErik Nordmark ire_refhold(ire2); 3063bd670b35SErik Nordmark } else { 3064bd670b35SErik Nordmark ire2 = NULL; 3065bd670b35SErik Nordmark } 3066bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3067bd670b35SErik Nordmark if (ire2 != NULL) { 3068bd670b35SErik Nordmark ire_delete(ire2); 3069bd670b35SErik Nordmark ire_refrele(ire2); 3070bd670b35SErik Nordmark return (B_TRUE); 3071bd670b35SErik Nordmark } 3072bd670b35SErik Nordmark } 3073bd670b35SErik Nordmark /* 3074bd670b35SErik Nordmark * No redirect involved. Increment badcnt so that if we have ECMP 3075bd670b35SErik Nordmark * routes we are likely to pick a different one for the next packet. 3076bd670b35SErik Nordmark * 3077bd670b35SErik Nordmark * If the NCE is unreachable and condemned we should drop the reference 3078bd670b35SErik Nordmark * to it so that a new NCE can be created. 3079bd670b35SErik Nordmark * 3080bd670b35SErik Nordmark * Finally we increment the generation number so that any ixa_ire 3081bd670b35SErik Nordmark * cache will be revalidated. 3082bd670b35SErik Nordmark */ 3083bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 3084bd670b35SErik Nordmark ire->ire_badcnt++; 3085d3d50737SRafael Vanoni ire->ire_last_badcnt = TICK_TO_SEC(ddi_get_lbolt64()); 3086bd670b35SErik Nordmark nce = ire->ire_nce_cache; 3087bd670b35SErik Nordmark if (nce != NULL && nce->nce_is_condemned && 3088bd670b35SErik Nordmark nce->nce_common->ncec_state == ND_UNREACHABLE) 3089bd670b35SErik Nordmark ire->ire_nce_cache = NULL; 3090bd670b35SErik Nordmark else 3091bd670b35SErik Nordmark nce = NULL; 3092bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3093bd670b35SErik Nordmark if (nce != NULL) 3094bd670b35SErik Nordmark nce_refrele(nce); 3095bd670b35SErik Nordmark 3096bd670b35SErik Nordmark ire_increment_generation(ire); 3097bd670b35SErik Nordmark ire_dep_incr_generation(ire); 3098bd670b35SErik Nordmark 3099bd670b35SErik Nordmark return (ire->ire_bucket->irb_ire_cnt > 1); 3100bd670b35SErik Nordmark } 3101bd670b35SErik Nordmark 3102bd670b35SErik Nordmark /* 3103bd670b35SErik Nordmark * Walk ire_dep_parent chain and validate that ire_dep_parent->ire_generation == 3104bd670b35SErik Nordmark * ire_dep_parent_generation. 3105bd670b35SErik Nordmark * If they all match we just return ire_generation from the topmost IRE. 3106bd670b35SErik Nordmark * Otherwise we propagate the mismatch by setting all ire_dep_parent_generation 3107bd670b35SErik Nordmark * above the mismatch to IRE_GENERATION_VERIFY and also returning 3108bd670b35SErik Nordmark * IRE_GENERATION_VERIFY. 3109bd670b35SErik Nordmark */ 3110bd670b35SErik Nordmark uint_t 3111bd670b35SErik Nordmark ire_dep_validate_generations(ire_t *ire) 3112bd670b35SErik Nordmark { 3113bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 3114bd670b35SErik Nordmark uint_t generation; 3115bd670b35SErik Nordmark ire_t *ire1; 3116bd670b35SErik Nordmark 3117bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 3118bd670b35SErik Nordmark generation = ire->ire_generation; /* Assuming things match */ 3119bd670b35SErik Nordmark for (ire1 = ire; ire1 != NULL; ire1 = ire1->ire_dep_parent) { 3120bd670b35SErik Nordmark ASSERT(ire1->ire_ipversion == IPV4_VERSION || 3121bd670b35SErik Nordmark ire1->ire_ipversion == IPV6_VERSION); 3122bd670b35SErik Nordmark if (ire1->ire_dep_parent == NULL) 3123bd670b35SErik Nordmark break; 3124bd670b35SErik Nordmark if (ire1->ire_dep_parent_generation != 3125bd670b35SErik Nordmark ire1->ire_dep_parent->ire_generation) 3126bd670b35SErik Nordmark goto mismatch; 3127bd670b35SErik Nordmark } 3128bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3129bd670b35SErik Nordmark return (generation); 3130bd670b35SErik Nordmark 3131bd670b35SErik Nordmark mismatch: 3132bd670b35SErik Nordmark generation = IRE_GENERATION_VERIFY; 3133bd670b35SErik Nordmark /* Fill from top down to the mismatch with _VERIFY */ 3134bd670b35SErik Nordmark while (ire != ire1) { 3135bd670b35SErik Nordmark ASSERT(ire->ire_ipversion == IPV4_VERSION || 3136bd670b35SErik Nordmark ire->ire_ipversion == IPV6_VERSION); 3137bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 3138bd670b35SErik Nordmark ire->ire_dep_parent_generation = IRE_GENERATION_VERIFY; 3139bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3140bd670b35SErik Nordmark ire = ire->ire_dep_parent; 3141bd670b35SErik Nordmark } 3142bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3143bd670b35SErik Nordmark return (generation); 3144bd670b35SErik Nordmark } 3145bd670b35SErik Nordmark 3146bd670b35SErik Nordmark /* 3147bd670b35SErik Nordmark * Used when we need to return an ire with ire_dep_parent, but we 3148bd670b35SErik Nordmark * know the chain is invalid for instance we didn't create an IRE_IF_CLONE 3149bd670b35SErik Nordmark * Using IRE_GENERATION_VERIFY means that next time we'll redo the 3150bd670b35SErik Nordmark * recursive lookup. 3151bd670b35SErik Nordmark */ 3152bd670b35SErik Nordmark void 3153bd670b35SErik Nordmark ire_dep_invalidate_generations(ire_t *ire) 3154bd670b35SErik Nordmark { 3155bd670b35SErik Nordmark ip_stack_t *ipst = ire->ire_ipst; 3156bd670b35SErik Nordmark 3157bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 3158bd670b35SErik Nordmark while (ire != NULL) { 3159bd670b35SErik Nordmark ASSERT(ire->ire_ipversion == IPV4_VERSION || 3160bd670b35SErik Nordmark ire->ire_ipversion == IPV6_VERSION); 3161bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 3162bd670b35SErik Nordmark ire->ire_dep_parent_generation = IRE_GENERATION_VERIFY; 3163bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3164bd670b35SErik Nordmark ire = ire->ire_dep_parent; 3165bd670b35SErik Nordmark } 3166bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3167bd670b35SErik Nordmark } 3168bd670b35SErik Nordmark 3169bd670b35SErik Nordmark /* Set _VERIFY ire_dep_parent_generation for all children recursively */ 3170bd670b35SErik Nordmark static void 3171bd670b35SErik Nordmark ire_dep_invalidate_children(ire_t *child) 3172bd670b35SErik Nordmark { 3173bd670b35SErik Nordmark ip_stack_t *ipst = child->ire_ipst; 3174bd670b35SErik Nordmark 3175bd670b35SErik Nordmark ASSERT(RW_WRITE_HELD(&ipst->ips_ire_dep_lock)); 3176bd670b35SErik Nordmark /* Depth first */ 3177bd670b35SErik Nordmark if (child->ire_dep_children != NULL) 3178bd670b35SErik Nordmark ire_dep_invalidate_children(child->ire_dep_children); 3179bd670b35SErik Nordmark 3180bd670b35SErik Nordmark while (child != NULL) { 3181bd670b35SErik Nordmark mutex_enter(&child->ire_lock); 3182bd670b35SErik Nordmark child->ire_dep_parent_generation = IRE_GENERATION_VERIFY; 3183bd670b35SErik Nordmark mutex_exit(&child->ire_lock); 3184bd670b35SErik Nordmark child = child->ire_dep_sib_next; 3185bd670b35SErik Nordmark } 3186bd670b35SErik Nordmark } 3187bd670b35SErik Nordmark 3188bd670b35SErik Nordmark static void 3189bd670b35SErik Nordmark ire_dep_increment_children(ire_t *child) 3190bd670b35SErik Nordmark { 3191bd670b35SErik Nordmark ip_stack_t *ipst = child->ire_ipst; 3192bd670b35SErik Nordmark 3193bd670b35SErik Nordmark ASSERT(RW_READ_HELD(&ipst->ips_ire_dep_lock)); 3194bd670b35SErik Nordmark /* Depth first */ 3195bd670b35SErik Nordmark if (child->ire_dep_children != NULL) 3196bd670b35SErik Nordmark ire_dep_increment_children(child->ire_dep_children); 3197bd670b35SErik Nordmark 3198bd670b35SErik Nordmark while (child != NULL) { 3199bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(child)) 3200bd670b35SErik Nordmark ire_increment_generation(child); 3201bd670b35SErik Nordmark child = child->ire_dep_sib_next; 3202bd670b35SErik Nordmark } 3203bd670b35SErik Nordmark } 3204bd670b35SErik Nordmark 3205bd670b35SErik Nordmark /* 3206bd670b35SErik Nordmark * Walk all the children of this ire recursively and increment their 3207bd670b35SErik Nordmark * generation number. 3208bd670b35SErik Nordmark */ 3209bd670b35SErik Nordmark void 3210bd670b35SErik Nordmark ire_dep_incr_generation(ire_t *parent) 3211bd670b35SErik Nordmark { 3212bd670b35SErik Nordmark ip_stack_t *ipst = parent->ire_ipst; 3213bd670b35SErik Nordmark 3214bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 3215bd670b35SErik Nordmark if (parent->ire_dep_children != NULL) 3216bd670b35SErik Nordmark ire_dep_increment_children(parent->ire_dep_children); 3217bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3218bd670b35SErik Nordmark } 3219bd670b35SErik Nordmark 3220bd670b35SErik Nordmark /* 3221bd670b35SErik Nordmark * Get a new ire_nce_cache for this IRE as well as its nexthop. 3222bd670b35SErik Nordmark * Returns zero if it succeeds. Can fail due to lack of memory or when 3223bd670b35SErik Nordmark * the route has become unreachable. Returns ENOMEM and ENETUNREACH in those 3224bd670b35SErik Nordmark * cases. 3225bd670b35SErik Nordmark * 3226bd670b35SErik Nordmark * In the in.mpathd case, the ire will have ire_testhidden 3227bd670b35SErik Nordmark * set; so we should create the ncec for the underlying ill. 3228bd670b35SErik Nordmark * 3229bd670b35SErik Nordmark * Note that the error returned by ire_revalidate_nce() is ignored by most 3230bd670b35SErik Nordmark * callers except ire_handle_condemned_nce(), which handles the ENETUNREACH 3231bd670b35SErik Nordmark * error to mark potentially bad ire's. For all the other callers, an 3232bd670b35SErik Nordmark * error return could indicate a transient condition like ENOMEM, or could 3233bd670b35SErik Nordmark * be the result of an interface that is going down/unplumbing. In the former 3234bd670b35SErik Nordmark * case (transient error), we would leave the old stale ire/ire_nce_cache 3235bd670b35SErik Nordmark * in place, and possibly use incorrect link-layer information to send packets 3236bd670b35SErik Nordmark * but would eventually recover. In the latter case (ill down/replumb), 3237bd670b35SErik Nordmark * ire_revalidate_nce() might return a condemned nce back, but we would then 3238bd670b35SErik Nordmark * recover in the packet output path. 3239bd670b35SErik Nordmark */ 3240bd670b35SErik Nordmark int 3241bd670b35SErik Nordmark ire_revalidate_nce(ire_t *ire) 3242bd670b35SErik Nordmark { 3243bd670b35SErik Nordmark nce_t *nce, *old_nce; 3244bd670b35SErik Nordmark ire_t *nexthop; 3245bd670b35SErik Nordmark 3246bd670b35SErik Nordmark /* 3247bd670b35SErik Nordmark * For multicast we conceptually have an NCE but we don't store it 3248bd670b35SErik Nordmark * in ire_nce_cache; when ire_to_nce is called we allocate the nce. 3249bd670b35SErik Nordmark */ 3250bd670b35SErik Nordmark if (ire->ire_type & IRE_MULTICAST) 3251bd670b35SErik Nordmark return (0); 3252bd670b35SErik Nordmark 3253bd670b35SErik Nordmark /* ire_testhidden should only be set on under-interfaces */ 3254bd670b35SErik Nordmark ASSERT(!ire->ire_testhidden || !IS_IPMP(ire->ire_ill)); 3255bd670b35SErik Nordmark 3256bd670b35SErik Nordmark nexthop = ire_nexthop(ire); 3257bd670b35SErik Nordmark if (nexthop == NULL) { 3258bd670b35SErik Nordmark /* The route is potentially bad */ 3259bd670b35SErik Nordmark (void) ire_no_good(ire); 3260bd670b35SErik Nordmark return (ENETUNREACH); 3261bd670b35SErik Nordmark } 3262bd670b35SErik Nordmark if (ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK)) { 3263bd670b35SErik Nordmark ASSERT(ire->ire_ill != NULL); 3264bd670b35SErik Nordmark 3265bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) 3266bd670b35SErik Nordmark nce = nce_lookup_v4(ire->ire_ill, &ire->ire_addr); 3267bd670b35SErik Nordmark else 3268bd670b35SErik Nordmark nce = nce_lookup_v6(ire->ire_ill, &ire->ire_addr_v6); 3269bd670b35SErik Nordmark } else { 3270bd670b35SErik Nordmark ASSERT(nexthop->ire_type & IRE_ONLINK); 3271bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) { 3272bd670b35SErik Nordmark nce = arp_nce_init(nexthop->ire_ill, nexthop->ire_addr, 3273bd670b35SErik Nordmark nexthop->ire_type); 3274bd670b35SErik Nordmark } else { 3275bd670b35SErik Nordmark nce = ndp_nce_init(nexthop->ire_ill, 3276bd670b35SErik Nordmark &nexthop->ire_addr_v6, nexthop->ire_type); 3277bd670b35SErik Nordmark } 3278bd670b35SErik Nordmark } 3279bd670b35SErik Nordmark if (nce == NULL) { 3280bd670b35SErik Nordmark /* 3281bd670b35SErik Nordmark * Leave the old stale one in place to avoid a NULL 3282bd670b35SErik Nordmark * ire_nce_cache. 3283bd670b35SErik Nordmark */ 3284bd670b35SErik Nordmark ire_refrele(nexthop); 3285bd670b35SErik Nordmark return (ENOMEM); 3286bd670b35SErik Nordmark } 3287bd670b35SErik Nordmark 3288bd670b35SErik Nordmark if (nexthop != ire) { 3289bd670b35SErik Nordmark /* Update the nexthop ire */ 3290bd670b35SErik Nordmark mutex_enter(&nexthop->ire_lock); 3291bd670b35SErik Nordmark old_nce = nexthop->ire_nce_cache; 3292bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(nexthop)) { 3293bd670b35SErik Nordmark nce_refhold(nce); 3294bd670b35SErik Nordmark nexthop->ire_nce_cache = nce; 3295bd670b35SErik Nordmark } else { 3296bd670b35SErik Nordmark nexthop->ire_nce_cache = NULL; 3297bd670b35SErik Nordmark } 3298bd670b35SErik Nordmark mutex_exit(&nexthop->ire_lock); 3299bd670b35SErik Nordmark if (old_nce != NULL) 3300bd670b35SErik Nordmark nce_refrele(old_nce); 3301bd670b35SErik Nordmark } 3302bd670b35SErik Nordmark ire_refrele(nexthop); 3303bd670b35SErik Nordmark 3304bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 3305bd670b35SErik Nordmark old_nce = ire->ire_nce_cache; 3306bd670b35SErik Nordmark if (!IRE_IS_CONDEMNED(ire)) { 3307bd670b35SErik Nordmark nce_refhold(nce); 3308bd670b35SErik Nordmark ire->ire_nce_cache = nce; 3309bd670b35SErik Nordmark } else { 3310bd670b35SErik Nordmark ire->ire_nce_cache = NULL; 3311bd670b35SErik Nordmark } 3312bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3313bd670b35SErik Nordmark if (old_nce != NULL) 3314bd670b35SErik Nordmark nce_refrele(old_nce); 3315bd670b35SErik Nordmark 3316bd670b35SErik Nordmark nce_refrele(nce); 3317c793af95Ssangeeta return (0); 3318c793af95Ssangeeta } 33195b17e9bdSJon Anderson 33205b17e9bdSJon Anderson /* 3321bd670b35SErik Nordmark * Get a held nce for a given ire. 3322bd670b35SErik Nordmark * In the common case this is just from ire_nce_cache. 3323bd670b35SErik Nordmark * For IRE_MULTICAST this needs to do an explicit lookup since we do not 3324bd670b35SErik Nordmark * have an IRE_MULTICAST per address. 3325bd670b35SErik Nordmark * Note that this explicitly returns CONDEMNED NCEs. The caller needs those 3326bd670b35SErik Nordmark * so they can check whether the NCE went unreachable (as opposed to was 3327bd670b35SErik Nordmark * condemned for some other reason). 33285b17e9bdSJon Anderson */ 3329bd670b35SErik Nordmark nce_t * 3330bd670b35SErik Nordmark ire_to_nce(ire_t *ire, ipaddr_t v4nexthop, const in6_addr_t *v6nexthop) 33315b17e9bdSJon Anderson { 3332bd670b35SErik Nordmark nce_t *nce; 33335b17e9bdSJon Anderson 3334bd670b35SErik Nordmark if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) 3335bd670b35SErik Nordmark return (NULL); 3336bd670b35SErik Nordmark 3337bd670b35SErik Nordmark /* ire_testhidden should only be set on under-interfaces */ 3338bd670b35SErik Nordmark ASSERT(!ire->ire_testhidden || !IS_IPMP(ire->ire_ill)); 3339bd670b35SErik Nordmark 3340bd670b35SErik Nordmark mutex_enter(&ire->ire_lock); 3341bd670b35SErik Nordmark nce = ire->ire_nce_cache; 3342bd670b35SErik Nordmark if (nce != NULL) { 3343bd670b35SErik Nordmark nce_refhold(nce); 3344bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3345bd670b35SErik Nordmark return (nce); 3346bd670b35SErik Nordmark } 3347bd670b35SErik Nordmark mutex_exit(&ire->ire_lock); 3348bd670b35SErik Nordmark 3349bd670b35SErik Nordmark if (ire->ire_type & IRE_MULTICAST) { 3350bd670b35SErik Nordmark ASSERT(ire->ire_ill != NULL); 3351bd670b35SErik Nordmark 3352bd670b35SErik Nordmark if (ire->ire_ipversion == IPV4_VERSION) { 3353bd670b35SErik Nordmark ASSERT(v6nexthop == NULL); 3354bd670b35SErik Nordmark 3355bd670b35SErik Nordmark nce = arp_nce_init(ire->ire_ill, v4nexthop, 3356bd670b35SErik Nordmark ire->ire_type); 3357bd670b35SErik Nordmark } else { 3358bd670b35SErik Nordmark ASSERT(v6nexthop != NULL); 3359bd670b35SErik Nordmark ASSERT(v4nexthop == 0); 3360bd670b35SErik Nordmark nce = ndp_nce_init(ire->ire_ill, v6nexthop, 3361bd670b35SErik Nordmark ire->ire_type); 3362bd670b35SErik Nordmark } 3363bd670b35SErik Nordmark return (nce); 3364bd670b35SErik Nordmark } 33655b17e9bdSJon Anderson return (NULL); 33665b17e9bdSJon Anderson } 33675b17e9bdSJon Anderson 3368bd670b35SErik Nordmark nce_t * 3369bd670b35SErik Nordmark ire_to_nce_pkt(ire_t *ire, mblk_t *mp) 3370bd670b35SErik Nordmark { 3371bd670b35SErik Nordmark ipha_t *ipha; 3372bd670b35SErik Nordmark ip6_t *ip6h; 33735b17e9bdSJon Anderson 3374bd670b35SErik Nordmark if (IPH_HDR_VERSION(mp->b_rptr) == IPV4_VERSION) { 3375bd670b35SErik Nordmark ipha = (ipha_t *)mp->b_rptr; 3376bd670b35SErik Nordmark return (ire_to_nce(ire, ipha->ipha_dst, NULL)); 3377bd670b35SErik Nordmark } else { 3378bd670b35SErik Nordmark ip6h = (ip6_t *)mp->b_rptr; 3379bd670b35SErik Nordmark return (ire_to_nce(ire, INADDR_ANY, &ip6h->ip6_dst)); 3380bd670b35SErik Nordmark } 33815b17e9bdSJon Anderson } 33825b17e9bdSJon Anderson 33835b17e9bdSJon Anderson /* 3384bd670b35SErik Nordmark * Given an IRE_INTERFACE (that matches more than one address) create 3385bd670b35SErik Nordmark * and return an IRE_IF_CLONE for the specific address. 3386bd670b35SErik Nordmark * Return the generation number. 3387bd670b35SErik Nordmark * Returns NULL is no memory for the IRE. 3388bd670b35SErik Nordmark * Handles both IPv4 and IPv6. 33895b17e9bdSJon Anderson */ 33905b17e9bdSJon Anderson ire_t * 3391bd670b35SErik Nordmark ire_create_if_clone(ire_t *ire_if, const in6_addr_t *addr, uint_t *generationp) 33925b17e9bdSJon Anderson { 3393bd670b35SErik Nordmark ire_t *ire; 3394bd670b35SErik Nordmark ire_t *nire; 33955b17e9bdSJon Anderson 3396bd670b35SErik Nordmark if (ire_if->ire_ipversion == IPV4_VERSION) { 3397bd670b35SErik Nordmark ipaddr_t v4addr; 3398bd670b35SErik Nordmark ipaddr_t mask = IP_HOST_MASK; 33995b17e9bdSJon Anderson 3400bd670b35SErik Nordmark ASSERT(IN6_IS_ADDR_V4MAPPED(addr)); 3401bd670b35SErik Nordmark IN6_V4MAPPED_TO_IPADDR(addr, v4addr); 3402bd670b35SErik Nordmark 3403bd670b35SErik Nordmark ire = ire_create( 3404bd670b35SErik Nordmark (uchar_t *)&v4addr, /* dest address */ 3405bd670b35SErik Nordmark (uchar_t *)&mask, /* mask */ 3406bd670b35SErik Nordmark (uchar_t *)&ire_if->ire_gateway_addr, 3407bd670b35SErik Nordmark IRE_IF_CLONE, /* IRE type */ 3408bd670b35SErik Nordmark ire_if->ire_ill, 3409bd670b35SErik Nordmark ire_if->ire_zoneid, 3410bd670b35SErik Nordmark ire_if->ire_flags | RTF_HOST, 3411bd670b35SErik Nordmark NULL, /* No security attr for IRE_IF_ALL */ 3412bd670b35SErik Nordmark ire_if->ire_ipst); 3413bd670b35SErik Nordmark } else { 3414bd670b35SErik Nordmark ASSERT(!IN6_IS_ADDR_V4MAPPED(addr)); 3415bd670b35SErik Nordmark ire = ire_create_v6( 3416bd670b35SErik Nordmark addr, /* dest address */ 3417bd670b35SErik Nordmark &ipv6_all_ones, /* mask */ 3418bd670b35SErik Nordmark &ire_if->ire_gateway_addr_v6, /* gateway addr */ 3419bd670b35SErik Nordmark IRE_IF_CLONE, /* IRE type */ 3420bd670b35SErik Nordmark ire_if->ire_ill, 3421bd670b35SErik Nordmark ire_if->ire_zoneid, 3422bd670b35SErik Nordmark ire_if->ire_flags | RTF_HOST, 3423bd670b35SErik Nordmark NULL, /* No security attr for IRE_IF_ALL */ 3424bd670b35SErik Nordmark ire_if->ire_ipst); 3425bd670b35SErik Nordmark } 3426bd670b35SErik Nordmark if (ire == NULL) 3427bd670b35SErik Nordmark return (NULL); 3428bd670b35SErik Nordmark 3429bd670b35SErik Nordmark /* Take the metrics, in particular the mtu, from the IRE_IF */ 3430bd670b35SErik Nordmark ire->ire_metrics = ire_if->ire_metrics; 3431bd670b35SErik Nordmark 3432bd670b35SErik Nordmark nire = ire_add(ire); 3433bd670b35SErik Nordmark if (nire == NULL) /* Some failure */ 3434bd670b35SErik Nordmark return (NULL); 3435bd670b35SErik Nordmark 3436bd670b35SErik Nordmark if (generationp != NULL) 3437bd670b35SErik Nordmark *generationp = nire->ire_generation; 3438bd670b35SErik Nordmark 3439bd670b35SErik Nordmark /* 3440bd670b35SErik Nordmark * Make sure races don't add a duplicate by 3441bd670b35SErik Nordmark * catching the case when an identical was returned. 3442bd670b35SErik Nordmark */ 3443bd670b35SErik Nordmark if (nire != ire) { 3444bd670b35SErik Nordmark ASSERT(nire->ire_identical_ref > 1); 3445bd670b35SErik Nordmark ire_delete(nire); 3446bd670b35SErik Nordmark } 3447bd670b35SErik Nordmark return (nire); 3448bd670b35SErik Nordmark } 3449bd670b35SErik Nordmark 3450bd670b35SErik Nordmark /* 3451bd670b35SErik Nordmark * The argument is an IRE_INTERFACE. Delete all of IRE_IF_CLONE in the 3452bd670b35SErik Nordmark * ire_dep_children (just walk the ire_dep_sib_next since they are all 3453bd670b35SErik Nordmark * immediate children.) 3454bd670b35SErik Nordmark * Since we hold a lock while we remove them we need to defer the actual 3455bd670b35SErik Nordmark * calls to ire_delete() until we have dropped the lock. This makes things 3456bd670b35SErik Nordmark * less efficient since we restart at the top after dropping the lock. But 3457bd670b35SErik Nordmark * we only run when an IRE_INTERFACE is deleted which is infrquent. 3458bd670b35SErik Nordmark * 3459bd670b35SErik Nordmark * Note that ire_dep_children can be any mixture of offlink routes and 3460bd670b35SErik Nordmark * IRE_IF_CLONE entries. 3461bd670b35SErik Nordmark */ 3462bd670b35SErik Nordmark void 3463bd670b35SErik Nordmark ire_dep_delete_if_clone(ire_t *parent) 3464bd670b35SErik Nordmark { 3465bd670b35SErik Nordmark ip_stack_t *ipst = parent->ire_ipst; 3466bd670b35SErik Nordmark ire_t *child, *next; 3467bd670b35SErik Nordmark 3468bd670b35SErik Nordmark restart: 3469bd670b35SErik Nordmark rw_enter(&ipst->ips_ire_dep_lock, RW_READER); 3470bd670b35SErik Nordmark if (parent->ire_dep_children == NULL) { 3471bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3472bd670b35SErik Nordmark return; 3473bd670b35SErik Nordmark } 3474bd670b35SErik Nordmark child = parent->ire_dep_children; 3475bd670b35SErik Nordmark while (child != NULL) { 3476bd670b35SErik Nordmark next = child->ire_dep_sib_next; 3477bd670b35SErik Nordmark if ((child->ire_type & IRE_IF_CLONE) && 3478bd670b35SErik Nordmark !IRE_IS_CONDEMNED(child)) { 3479bd670b35SErik Nordmark ire_refhold(child); 3480bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3481bd670b35SErik Nordmark ire_delete(child); 3482bd670b35SErik Nordmark ASSERT(IRE_IS_CONDEMNED(child)); 3483bd670b35SErik Nordmark ire_refrele(child); 3484bd670b35SErik Nordmark goto restart; 3485bd670b35SErik Nordmark } 3486bd670b35SErik Nordmark child = next; 3487bd670b35SErik Nordmark } 3488bd670b35SErik Nordmark rw_exit(&ipst->ips_ire_dep_lock); 3489bd670b35SErik Nordmark } 3490bd670b35SErik Nordmark 3491bd670b35SErik Nordmark /* 3492bd670b35SErik Nordmark * ire_pref() is used in recursive route-resolution for a destination to 3493bd670b35SErik Nordmark * determine the preference of an ire, where "preference" is determined 3494bd670b35SErik Nordmark * based on the level of indirection to the destination of the ire. 3495bd670b35SErik Nordmark * A higher preference indicates that fewer lookups are needed to complete 3496bd670b35SErik Nordmark * recursive route lookup. Thus 3497bd670b35SErik Nordmark * ire_pref(RTF_INDIRECT) < ire_pref(IRE_IF_RESOLVER) < ire_pref(IRE_PREF_CLONE) 3498bd670b35SErik Nordmark */ 3499bd670b35SErik Nordmark int 3500bd670b35SErik Nordmark ire_pref(ire_t *ire) 3501bd670b35SErik Nordmark { 3502bd670b35SErik Nordmark if (ire->ire_flags & RTF_INDIRECT) 3503bd670b35SErik Nordmark return (1); 3504bd670b35SErik Nordmark if (ire->ire_type & IRE_OFFLINK) 3505bd670b35SErik Nordmark return (2); 3506bd670b35SErik Nordmark if (ire->ire_type & (IRE_IF_RESOLVER|IRE_IF_NORESOLVER)) 3507bd670b35SErik Nordmark return (3); 3508bd670b35SErik Nordmark if (ire->ire_type & IRE_IF_CLONE) 3509bd670b35SErik Nordmark return (4); 3510bd670b35SErik Nordmark if (ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK|IRE_BROADCAST)) 3511bd670b35SErik Nordmark return (5); 3512bd670b35SErik Nordmark return (-1); /* unknown ire_type */ 35135b17e9bdSJon Anderson } 3514