1 /* 2 * Copyright (c) 2004 Luigi Rizzo, Alessandro Cerri. All rights reserved. 3 * Copyright (c) 2004-2008 Qing Li. All rights reserved. 4 * Copyright (c) 2008 Kip Macy. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_ddb.h" 31 #include "opt_inet.h" 32 #include "opt_inet6.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/mbuf.h> 38 #include <sys/syslog.h> 39 #include <sys/sysctl.h> 40 #include <sys/socket.h> 41 #include <sys/kernel.h> 42 #include <sys/lock.h> 43 #include <sys/mutex.h> 44 #include <sys/rwlock.h> 45 46 #ifdef DDB 47 #include <ddb/ddb.h> 48 #endif 49 50 #include <vm/uma.h> 51 52 #include <netinet/in.h> 53 #include <net/if_llatbl.h> 54 #include <net/if.h> 55 #include <net/if_dl.h> 56 #include <net/if_var.h> 57 #include <net/route.h> 58 #include <net/vnet.h> 59 #include <netinet/if_ether.h> 60 #include <netinet6/in6_var.h> 61 #include <netinet6/nd6.h> 62 63 MALLOC_DEFINE(M_LLTABLE, "lltable", "link level address tables"); 64 65 static VNET_DEFINE(SLIST_HEAD(, lltable), lltables); 66 #define V_lltables VNET(lltables) 67 68 static void vnet_lltable_init(void); 69 70 struct rwlock lltable_rwlock; 71 RW_SYSINIT(lltable_rwlock, &lltable_rwlock, "lltable_rwlock"); 72 73 static void lltable_unlink(struct lltable *llt); 74 static void llentries_unlink(struct lltable *llt, struct llentries *head); 75 76 static void htable_unlink_entry(struct llentry *lle); 77 static void htable_link_entry(struct lltable *llt, struct llentry *lle); 78 static int htable_foreach_lle(struct lltable *llt, llt_foreach_cb_t *f, 79 void *farg); 80 81 /* 82 * Dump lle state for a specific address family. 83 */ 84 static int 85 lltable_dump_af(struct lltable *llt, struct sysctl_req *wr) 86 { 87 int error; 88 89 LLTABLE_LOCK_ASSERT(); 90 91 if (llt->llt_ifp->if_flags & IFF_LOOPBACK) 92 return (0); 93 error = 0; 94 95 IF_AFDATA_RLOCK(llt->llt_ifp); 96 error = lltable_foreach_lle(llt, 97 (llt_foreach_cb_t *)llt->llt_dump_entry, wr); 98 IF_AFDATA_RUNLOCK(llt->llt_ifp); 99 100 return (error); 101 } 102 103 /* 104 * Dump arp state for a specific address family. 105 */ 106 int 107 lltable_sysctl_dumparp(int af, struct sysctl_req *wr) 108 { 109 struct lltable *llt; 110 int error = 0; 111 112 LLTABLE_RLOCK(); 113 SLIST_FOREACH(llt, &V_lltables, llt_link) { 114 if (llt->llt_af == af) { 115 error = lltable_dump_af(llt, wr); 116 if (error != 0) 117 goto done; 118 } 119 } 120 done: 121 LLTABLE_RUNLOCK(); 122 return (error); 123 } 124 125 /* 126 * Common function helpers for chained hash table. 127 */ 128 129 /* 130 * Runs specified callback for each entry in @llt. 131 * Caller does the locking. 132 * 133 */ 134 static int 135 htable_foreach_lle(struct lltable *llt, llt_foreach_cb_t *f, void *farg) 136 { 137 struct llentry *lle, *next; 138 int i, error; 139 140 error = 0; 141 142 for (i = 0; i < llt->llt_hsize; i++) { 143 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 144 error = f(llt, lle, farg); 145 if (error != 0) 146 break; 147 } 148 } 149 150 return (error); 151 } 152 153 static void 154 htable_link_entry(struct lltable *llt, struct llentry *lle) 155 { 156 struct llentries *lleh; 157 uint32_t hashidx; 158 159 if ((lle->la_flags & LLE_LINKED) != 0) 160 return; 161 162 IF_AFDATA_WLOCK_ASSERT(llt->llt_ifp); 163 164 hashidx = llt->llt_hash(lle, llt->llt_hsize); 165 lleh = &llt->lle_head[hashidx]; 166 167 lle->lle_tbl = llt; 168 lle->lle_head = lleh; 169 lle->la_flags |= LLE_LINKED; 170 LIST_INSERT_HEAD(lleh, lle, lle_next); 171 } 172 173 static void 174 htable_unlink_entry(struct llentry *lle) 175 { 176 177 if ((lle->la_flags & LLE_LINKED) != 0) { 178 IF_AFDATA_WLOCK_ASSERT(lle->lle_tbl->llt_ifp); 179 LIST_REMOVE(lle, lle_next); 180 lle->la_flags &= ~(LLE_VALID | LLE_LINKED); 181 #if 0 182 lle->lle_tbl = NULL; 183 lle->lle_head = NULL; 184 #endif 185 } 186 } 187 188 struct prefix_match_data { 189 const struct sockaddr *addr; 190 const struct sockaddr *mask; 191 struct llentries dchain; 192 u_int flags; 193 }; 194 195 static int 196 htable_prefix_free_cb(struct lltable *llt, struct llentry *lle, void *farg) 197 { 198 struct prefix_match_data *pmd; 199 200 pmd = (struct prefix_match_data *)farg; 201 202 if (llt->llt_match_prefix(pmd->addr, pmd->mask, pmd->flags, lle)) { 203 LLE_WLOCK(lle); 204 LIST_INSERT_HEAD(&pmd->dchain, lle, lle_chain); 205 } 206 207 return (0); 208 } 209 210 static void 211 htable_prefix_free(struct lltable *llt, const struct sockaddr *addr, 212 const struct sockaddr *mask, u_int flags) 213 { 214 struct llentry *lle, *next; 215 struct prefix_match_data pmd; 216 217 bzero(&pmd, sizeof(pmd)); 218 pmd.addr = addr; 219 pmd.mask = mask; 220 pmd.flags = flags; 221 LIST_INIT(&pmd.dchain); 222 223 IF_AFDATA_WLOCK(llt->llt_ifp); 224 /* Push matching lles to chain */ 225 lltable_foreach_lle(llt, htable_prefix_free_cb, &pmd); 226 227 llentries_unlink(llt, &pmd.dchain); 228 IF_AFDATA_WUNLOCK(llt->llt_ifp); 229 230 LIST_FOREACH_SAFE(lle, &pmd.dchain, lle_chain, next) 231 lltable_free_entry(llt, lle); 232 } 233 234 static void 235 htable_free_tbl(struct lltable *llt) 236 { 237 238 free(llt->lle_head, M_LLTABLE); 239 free(llt, M_LLTABLE); 240 } 241 242 static void 243 llentries_unlink(struct lltable *llt, struct llentries *head) 244 { 245 struct llentry *lle, *next; 246 247 LIST_FOREACH_SAFE(lle, head, lle_chain, next) 248 llt->llt_unlink_entry(lle); 249 } 250 251 /* 252 * Helper function used to drop all mbufs in hold queue. 253 * 254 * Returns the number of held packets, if any, that were dropped. 255 */ 256 size_t 257 lltable_drop_entry_queue(struct llentry *lle) 258 { 259 size_t pkts_dropped; 260 struct mbuf *next; 261 262 LLE_WLOCK_ASSERT(lle); 263 264 pkts_dropped = 0; 265 while ((lle->la_numheld > 0) && (lle->la_hold != NULL)) { 266 next = lle->la_hold->m_nextpkt; 267 m_freem(lle->la_hold); 268 lle->la_hold = next; 269 lle->la_numheld--; 270 pkts_dropped++; 271 } 272 273 KASSERT(lle->la_numheld == 0, 274 ("%s: la_numheld %d > 0, pkts_droped %zd", __func__, 275 lle->la_numheld, pkts_dropped)); 276 277 return (pkts_dropped); 278 } 279 280 void 281 lltable_set_entry_addr(struct ifnet *ifp, struct llentry *lle, 282 const char *lladdr) 283 { 284 285 bcopy(lladdr, &lle->ll_addr, ifp->if_addrlen); 286 lle->la_flags |= LLE_VALID; 287 lle->r_flags |= RLLE_VALID; 288 } 289 290 /* 291 * Tries to update @lle link-level address. 292 * Since update requires AFDATA WLOCK, function 293 * drops @lle lock, acquires AFDATA lock and then acquires 294 * @lle lock to maintain lock order. 295 * 296 * Returns 1 on success. 297 */ 298 int 299 lltable_try_set_entry_addr(struct ifnet *ifp, struct llentry *lle, 300 const char *lladdr) 301 { 302 303 /* Perform real LLE update */ 304 /* use afdata WLOCK to update fields */ 305 LLE_WLOCK_ASSERT(lle); 306 LLE_ADDREF(lle); 307 LLE_WUNLOCK(lle); 308 IF_AFDATA_WLOCK(ifp); 309 LLE_WLOCK(lle); 310 311 /* 312 * Since we droppped LLE lock, other thread might have deleted 313 * this lle. Check and return 314 */ 315 if ((lle->la_flags & LLE_DELETED) != 0) { 316 IF_AFDATA_WUNLOCK(ifp); 317 LLE_FREE_LOCKED(lle); 318 return (0); 319 } 320 321 /* Update data */ 322 lltable_set_entry_addr(ifp, lle, lladdr); 323 324 IF_AFDATA_WUNLOCK(ifp); 325 326 LLE_REMREF(lle); 327 328 return (1); 329 } 330 331 /* 332 * 333 * Performes generic cleanup routines and frees lle. 334 * 335 * Called for non-linked entries, with callouts and 336 * other AF-specific cleanups performed. 337 * 338 * @lle must be passed WLOCK'ed 339 * 340 * Returns the number of held packets, if any, that were dropped. 341 */ 342 size_t 343 llentry_free(struct llentry *lle) 344 { 345 size_t pkts_dropped; 346 347 LLE_WLOCK_ASSERT(lle); 348 349 KASSERT((lle->la_flags & LLE_LINKED) == 0, ("freeing linked lle")); 350 351 pkts_dropped = lltable_drop_entry_queue(lle); 352 353 LLE_FREE_LOCKED(lle); 354 355 return (pkts_dropped); 356 } 357 358 /* 359 * (al)locate an llentry for address dst (equivalent to rtalloc for new-arp). 360 * 361 * If found the llentry * is returned referenced and unlocked. 362 */ 363 struct llentry * 364 llentry_alloc(struct ifnet *ifp, struct lltable *lt, 365 struct sockaddr_storage *dst) 366 { 367 struct llentry *la, *la_tmp; 368 369 IF_AFDATA_RLOCK(ifp); 370 la = lla_lookup(lt, LLE_EXCLUSIVE, (struct sockaddr *)dst); 371 IF_AFDATA_RUNLOCK(ifp); 372 373 if (la != NULL) { 374 LLE_ADDREF(la); 375 LLE_WUNLOCK(la); 376 return (la); 377 } 378 379 if ((ifp->if_flags & (IFF_NOARP | IFF_STATICARP)) == 0) { 380 la = lltable_alloc_entry(lt, 0, (struct sockaddr *)dst); 381 if (la == NULL) 382 return (NULL); 383 IF_AFDATA_WLOCK(ifp); 384 LLE_WLOCK(la); 385 /* Prefer any existing LLE over newly-created one */ 386 la_tmp = lla_lookup(lt, LLE_EXCLUSIVE, (struct sockaddr *)dst); 387 if (la_tmp == NULL) 388 lltable_link_entry(lt, la); 389 IF_AFDATA_WUNLOCK(ifp); 390 if (la_tmp != NULL) { 391 lltable_free_entry(lt, la); 392 la = la_tmp; 393 } 394 LLE_ADDREF(la); 395 LLE_WUNLOCK(la); 396 } 397 398 return (la); 399 } 400 401 /* 402 * Free all entries from given table and free itself. 403 */ 404 405 static int 406 lltable_free_cb(struct lltable *llt, struct llentry *lle, void *farg) 407 { 408 struct llentries *dchain; 409 410 dchain = (struct llentries *)farg; 411 412 LLE_WLOCK(lle); 413 LIST_INSERT_HEAD(dchain, lle, lle_chain); 414 415 return (0); 416 } 417 418 /* 419 * Free all entries from given table and free itself. 420 */ 421 void 422 lltable_free(struct lltable *llt) 423 { 424 struct llentry *lle, *next; 425 struct llentries dchain; 426 427 KASSERT(llt != NULL, ("%s: llt is NULL", __func__)); 428 429 lltable_unlink(llt); 430 431 LIST_INIT(&dchain); 432 IF_AFDATA_WLOCK(llt->llt_ifp); 433 /* Push all lles to @dchain */ 434 lltable_foreach_lle(llt, lltable_free_cb, &dchain); 435 llentries_unlink(llt, &dchain); 436 IF_AFDATA_WUNLOCK(llt->llt_ifp); 437 438 LIST_FOREACH_SAFE(lle, &dchain, lle_chain, next) { 439 if (callout_stop(&lle->lle_timer) > 0) 440 LLE_REMREF(lle); 441 llentry_free(lle); 442 } 443 444 llt->llt_free_tbl(llt); 445 } 446 447 #if 0 448 void 449 lltable_drain(int af) 450 { 451 struct lltable *llt; 452 struct llentry *lle; 453 register int i; 454 455 LLTABLE_RLOCK(); 456 SLIST_FOREACH(llt, &V_lltables, llt_link) { 457 if (llt->llt_af != af) 458 continue; 459 460 for (i=0; i < llt->llt_hsize; i++) { 461 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 462 LLE_WLOCK(lle); 463 if (lle->la_hold) { 464 m_freem(lle->la_hold); 465 lle->la_hold = NULL; 466 } 467 LLE_WUNLOCK(lle); 468 } 469 } 470 } 471 LLTABLE_RUNLOCK(); 472 } 473 #endif 474 475 /* 476 * Deletes an address from given lltable. 477 * Used for userland interaction to remove 478 * individual entries. Skips entries added by OS. 479 */ 480 int 481 lltable_delete_addr(struct lltable *llt, u_int flags, 482 const struct sockaddr *l3addr) 483 { 484 struct llentry *lle; 485 struct ifnet *ifp; 486 487 ifp = llt->llt_ifp; 488 IF_AFDATA_WLOCK(ifp); 489 lle = lla_lookup(llt, LLE_EXCLUSIVE, l3addr); 490 491 if (lle == NULL) { 492 IF_AFDATA_WUNLOCK(ifp); 493 return (ENOENT); 494 } 495 if ((lle->la_flags & LLE_IFADDR) != 0 && (flags & LLE_IFADDR) == 0) { 496 IF_AFDATA_WUNLOCK(ifp); 497 LLE_WUNLOCK(lle); 498 return (EPERM); 499 } 500 501 lltable_unlink_entry(llt, lle); 502 IF_AFDATA_WUNLOCK(ifp); 503 504 llt->llt_delete_entry(llt, lle); 505 506 return (0); 507 } 508 509 void 510 lltable_prefix_free(int af, struct sockaddr *addr, struct sockaddr *mask, 511 u_int flags) 512 { 513 struct lltable *llt; 514 515 LLTABLE_RLOCK(); 516 SLIST_FOREACH(llt, &V_lltables, llt_link) { 517 if (llt->llt_af != af) 518 continue; 519 520 llt->llt_prefix_free(llt, addr, mask, flags); 521 } 522 LLTABLE_RUNLOCK(); 523 } 524 525 struct lltable * 526 lltable_allocate_htbl(uint32_t hsize) 527 { 528 struct lltable *llt; 529 int i; 530 531 llt = malloc(sizeof(struct lltable), M_LLTABLE, M_WAITOK | M_ZERO); 532 llt->llt_hsize = hsize; 533 llt->lle_head = malloc(sizeof(struct llentries) * hsize, 534 M_LLTABLE, M_WAITOK | M_ZERO); 535 536 for (i = 0; i < llt->llt_hsize; i++) 537 LIST_INIT(&llt->lle_head[i]); 538 539 /* Set some default callbacks */ 540 llt->llt_link_entry = htable_link_entry; 541 llt->llt_unlink_entry = htable_unlink_entry; 542 llt->llt_prefix_free = htable_prefix_free; 543 llt->llt_foreach_entry = htable_foreach_lle; 544 llt->llt_free_tbl = htable_free_tbl; 545 546 return (llt); 547 } 548 549 /* 550 * Links lltable to global llt list. 551 */ 552 void 553 lltable_link(struct lltable *llt) 554 { 555 556 LLTABLE_WLOCK(); 557 SLIST_INSERT_HEAD(&V_lltables, llt, llt_link); 558 LLTABLE_WUNLOCK(); 559 } 560 561 static void 562 lltable_unlink(struct lltable *llt) 563 { 564 565 LLTABLE_WLOCK(); 566 SLIST_REMOVE(&V_lltables, llt, lltable, llt_link); 567 LLTABLE_WUNLOCK(); 568 569 } 570 571 /* 572 * External methods used by lltable consumers 573 */ 574 575 int 576 lltable_foreach_lle(struct lltable *llt, llt_foreach_cb_t *f, void *farg) 577 { 578 579 return (llt->llt_foreach_entry(llt, f, farg)); 580 } 581 582 struct llentry * 583 lltable_alloc_entry(struct lltable *llt, u_int flags, 584 const struct sockaddr *l3addr) 585 { 586 587 return (llt->llt_alloc_entry(llt, flags, l3addr)); 588 } 589 590 void 591 lltable_free_entry(struct lltable *llt, struct llentry *lle) 592 { 593 594 llt->llt_free_entry(llt, lle); 595 } 596 597 void 598 lltable_link_entry(struct lltable *llt, struct llentry *lle) 599 { 600 601 llt->llt_link_entry(llt, lle); 602 } 603 604 void 605 lltable_unlink_entry(struct lltable *llt, struct llentry *lle) 606 { 607 608 llt->llt_unlink_entry(lle); 609 } 610 611 void 612 lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 613 { 614 struct lltable *llt; 615 616 llt = lle->lle_tbl; 617 llt->llt_fill_sa_entry(lle, sa); 618 } 619 620 struct ifnet * 621 lltable_get_ifp(const struct lltable *llt) 622 { 623 624 return (llt->llt_ifp); 625 } 626 627 int 628 lltable_get_af(const struct lltable *llt) 629 { 630 631 return (llt->llt_af); 632 } 633 634 /* 635 * Called in route_output when rtm_flags contains RTF_LLDATA. 636 */ 637 int 638 lla_rt_output(struct rt_msghdr *rtm, struct rt_addrinfo *info) 639 { 640 struct sockaddr_dl *dl = 641 (struct sockaddr_dl *)info->rti_info[RTAX_GATEWAY]; 642 struct sockaddr *dst = (struct sockaddr *)info->rti_info[RTAX_DST]; 643 struct ifnet *ifp; 644 struct lltable *llt; 645 struct llentry *lle, *lle_tmp; 646 u_int laflags = 0; 647 int error; 648 649 KASSERT(dl != NULL && dl->sdl_family == AF_LINK, 650 ("%s: invalid dl\n", __func__)); 651 652 ifp = ifnet_byindex(dl->sdl_index); 653 if (ifp == NULL) { 654 log(LOG_INFO, "%s: invalid ifp (sdl_index %d)\n", 655 __func__, dl->sdl_index); 656 return EINVAL; 657 } 658 659 /* XXX linked list may be too expensive */ 660 LLTABLE_RLOCK(); 661 SLIST_FOREACH(llt, &V_lltables, llt_link) { 662 if (llt->llt_af == dst->sa_family && 663 llt->llt_ifp == ifp) 664 break; 665 } 666 LLTABLE_RUNLOCK(); 667 KASSERT(llt != NULL, ("Yep, ugly hacks are bad\n")); 668 669 error = 0; 670 671 switch (rtm->rtm_type) { 672 case RTM_ADD: 673 /* Add static LLE */ 674 laflags = 0; 675 if (rtm->rtm_rmx.rmx_expire == 0) 676 laflags = LLE_STATIC; 677 lle = lltable_alloc_entry(llt, laflags, dst); 678 if (lle == NULL) 679 return (ENOMEM); 680 681 bcopy(LLADDR(dl), &lle->ll_addr, ifp->if_addrlen); 682 if ((rtm->rtm_flags & RTF_ANNOUNCE)) 683 lle->la_flags |= LLE_PUB; 684 lle->la_flags |= LLE_VALID; 685 lle->r_flags |= RLLE_VALID; 686 lle->la_expire = rtm->rtm_rmx.rmx_expire; 687 688 laflags = lle->la_flags; 689 690 /* Try to link new entry */ 691 lle_tmp = NULL; 692 IF_AFDATA_WLOCK(ifp); 693 LLE_WLOCK(lle); 694 lle_tmp = lla_lookup(llt, LLE_EXCLUSIVE, dst); 695 if (lle_tmp != NULL) { 696 /* Check if we are trying to replace immutable entry */ 697 if ((lle_tmp->la_flags & LLE_IFADDR) != 0) { 698 IF_AFDATA_WUNLOCK(ifp); 699 LLE_WUNLOCK(lle_tmp); 700 lltable_free_entry(llt, lle); 701 return (EPERM); 702 } 703 /* Unlink existing entry from table */ 704 lltable_unlink_entry(llt, lle_tmp); 705 } 706 lltable_link_entry(llt, lle); 707 IF_AFDATA_WUNLOCK(ifp); 708 709 if (lle_tmp != NULL) { 710 EVENTHANDLER_INVOKE(lle_event, lle_tmp,LLENTRY_EXPIRED); 711 lltable_free_entry(llt, lle_tmp); 712 } 713 714 /* 715 * By invoking LLE handler here we might get 716 * two events on static LLE entry insertion 717 * in routing socket. However, since we might have 718 * other subscribers we need to generate this event. 719 */ 720 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_RESOLVED); 721 LLE_WUNLOCK(lle); 722 #ifdef INET 723 /* gratuitous ARP */ 724 if ((laflags & LLE_PUB) && dst->sa_family == AF_INET) 725 arprequest(ifp, 726 &((struct sockaddr_in *)dst)->sin_addr, 727 &((struct sockaddr_in *)dst)->sin_addr, 728 (u_char *)LLADDR(dl)); 729 #endif 730 731 break; 732 733 case RTM_DELETE: 734 return (lltable_delete_addr(llt, 0, dst)); 735 736 default: 737 error = EINVAL; 738 } 739 740 return (error); 741 } 742 743 static void 744 vnet_lltable_init() 745 { 746 747 SLIST_INIT(&V_lltables); 748 } 749 VNET_SYSINIT(vnet_lltable_init, SI_SUB_PSEUDO, SI_ORDER_FIRST, 750 vnet_lltable_init, NULL); 751 752 #ifdef DDB 753 struct llentry_sa { 754 struct llentry base; 755 struct sockaddr l3_addr; 756 }; 757 758 static void 759 llatbl_lle_show(struct llentry_sa *la) 760 { 761 struct llentry *lle; 762 uint8_t octet[6]; 763 764 lle = &la->base; 765 db_printf("lle=%p\n", lle); 766 db_printf(" lle_next=%p\n", lle->lle_next.le_next); 767 db_printf(" lle_lock=%p\n", &lle->lle_lock); 768 db_printf(" lle_tbl=%p\n", lle->lle_tbl); 769 db_printf(" lle_head=%p\n", lle->lle_head); 770 db_printf(" la_hold=%p\n", lle->la_hold); 771 db_printf(" la_numheld=%d\n", lle->la_numheld); 772 db_printf(" la_expire=%ju\n", (uintmax_t)lle->la_expire); 773 db_printf(" la_flags=0x%04x\n", lle->la_flags); 774 db_printf(" la_asked=%u\n", lle->la_asked); 775 db_printf(" la_preempt=%u\n", lle->la_preempt); 776 db_printf(" ln_state=%d\n", lle->ln_state); 777 db_printf(" ln_router=%u\n", lle->ln_router); 778 db_printf(" ln_ntick=%ju\n", (uintmax_t)lle->ln_ntick); 779 db_printf(" lle_refcnt=%d\n", lle->lle_refcnt); 780 bcopy(&lle->ll_addr.mac16, octet, sizeof(octet)); 781 db_printf(" ll_addr=%02x:%02x:%02x:%02x:%02x:%02x\n", 782 octet[0], octet[1], octet[2], octet[3], octet[4], octet[5]); 783 db_printf(" lle_timer=%p\n", &lle->lle_timer); 784 785 switch (la->l3_addr.sa_family) { 786 #ifdef INET 787 case AF_INET: 788 { 789 struct sockaddr_in *sin; 790 char l3s[INET_ADDRSTRLEN]; 791 792 sin = (struct sockaddr_in *)&la->l3_addr; 793 inet_ntoa_r(sin->sin_addr, l3s); 794 db_printf(" l3_addr=%s\n", l3s); 795 break; 796 } 797 #endif 798 #ifdef INET6 799 case AF_INET6: 800 { 801 struct sockaddr_in6 *sin6; 802 char l3s[INET6_ADDRSTRLEN]; 803 804 sin6 = (struct sockaddr_in6 *)&la->l3_addr; 805 ip6_sprintf(l3s, &sin6->sin6_addr); 806 db_printf(" l3_addr=%s\n", l3s); 807 break; 808 } 809 #endif 810 default: 811 db_printf(" l3_addr=N/A (af=%d)\n", la->l3_addr.sa_family); 812 break; 813 } 814 } 815 816 DB_SHOW_COMMAND(llentry, db_show_llentry) 817 { 818 819 if (!have_addr) { 820 db_printf("usage: show llentry <struct llentry *>\n"); 821 return; 822 } 823 824 llatbl_lle_show((struct llentry_sa *)addr); 825 } 826 827 static void 828 llatbl_llt_show(struct lltable *llt) 829 { 830 int i; 831 struct llentry *lle; 832 833 db_printf("llt=%p llt_af=%d llt_ifp=%p\n", 834 llt, llt->llt_af, llt->llt_ifp); 835 836 for (i = 0; i < llt->llt_hsize; i++) { 837 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 838 839 llatbl_lle_show((struct llentry_sa *)lle); 840 if (db_pager_quit) 841 return; 842 } 843 } 844 } 845 846 DB_SHOW_COMMAND(lltable, db_show_lltable) 847 { 848 849 if (!have_addr) { 850 db_printf("usage: show lltable <struct lltable *>\n"); 851 return; 852 } 853 854 llatbl_llt_show((struct lltable *)addr); 855 } 856 857 DB_SHOW_ALL_COMMAND(lltables, db_show_all_lltables) 858 { 859 VNET_ITERATOR_DECL(vnet_iter); 860 struct lltable *llt; 861 862 VNET_FOREACH(vnet_iter) { 863 CURVNET_SET_QUIET(vnet_iter); 864 #ifdef VIMAGE 865 db_printf("vnet=%p\n", curvnet); 866 #endif 867 SLIST_FOREACH(llt, &V_lltables, llt_link) { 868 db_printf("llt=%p llt_af=%d llt_ifp=%p(%s)\n", 869 llt, llt->llt_af, llt->llt_ifp, 870 (llt->llt_ifp != NULL) ? 871 llt->llt_ifp->if_xname : "?"); 872 if (have_addr && addr != 0) /* verbose */ 873 llatbl_llt_show(llt); 874 if (db_pager_quit) { 875 CURVNET_RESTORE(); 876 return; 877 } 878 } 879 CURVNET_RESTORE(); 880 } 881 } 882 #endif 883