ctld.c revision 279002
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD: stable/10/usr.sbin/ctld/ctld.c 279002 2015-02-19 14:31:16Z mav $"); 33 34#include <sys/types.h> 35#include <sys/time.h> 36#include <sys/socket.h> 37#include <sys/wait.h> 38#include <netinet/in.h> 39#include <arpa/inet.h> 40#include <assert.h> 41#include <ctype.h> 42#include <errno.h> 43#include <netdb.h> 44#include <signal.h> 45#include <stdbool.h> 46#include <stdio.h> 47#include <stdint.h> 48#include <stdlib.h> 49#include <string.h> 50#include <unistd.h> 51 52#include "ctld.h" 53#include "isns.h" 54 55bool proxy_mode = false; 56 57static volatile bool sighup_received = false; 58static volatile bool sigterm_received = false; 59static volatile bool sigalrm_received = false; 60 61static int nchildren = 0; 62 63static void 64usage(void) 65{ 66 67 fprintf(stderr, "usage: ctld [-d][-f config-file]\n"); 68 exit(1); 69} 70 71char * 72checked_strdup(const char *s) 73{ 74 char *c; 75 76 c = strdup(s); 77 if (c == NULL) 78 log_err(1, "strdup"); 79 return (c); 80} 81 82struct conf * 83conf_new(void) 84{ 85 struct conf *conf; 86 87 conf = calloc(1, sizeof(*conf)); 88 if (conf == NULL) 89 log_err(1, "calloc"); 90 TAILQ_INIT(&conf->conf_luns); 91 TAILQ_INIT(&conf->conf_targets); 92 TAILQ_INIT(&conf->conf_auth_groups); 93 TAILQ_INIT(&conf->conf_portal_groups); 94 TAILQ_INIT(&conf->conf_isns); 95 96 conf->conf_isns_period = 900; 97 conf->conf_isns_timeout = 5; 98 conf->conf_debug = 0; 99 conf->conf_timeout = 60; 100 conf->conf_maxproc = 30; 101 102 return (conf); 103} 104 105void 106conf_delete(struct conf *conf) 107{ 108 struct lun *lun, *ltmp; 109 struct target *targ, *tmp; 110 struct auth_group *ag, *cagtmp; 111 struct portal_group *pg, *cpgtmp; 112 struct isns *is, *istmp; 113 114 assert(conf->conf_pidfh == NULL); 115 116 TAILQ_FOREACH_SAFE(lun, &conf->conf_luns, l_next, ltmp) 117 lun_delete(lun); 118 TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp) 119 target_delete(targ); 120 TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp) 121 auth_group_delete(ag); 122 TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp) 123 portal_group_delete(pg); 124 TAILQ_FOREACH_SAFE(is, &conf->conf_isns, i_next, istmp) 125 isns_delete(is); 126 free(conf->conf_pidfile_path); 127 free(conf); 128} 129 130static struct auth * 131auth_new(struct auth_group *ag) 132{ 133 struct auth *auth; 134 135 auth = calloc(1, sizeof(*auth)); 136 if (auth == NULL) 137 log_err(1, "calloc"); 138 auth->a_auth_group = ag; 139 TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next); 140 return (auth); 141} 142 143static void 144auth_delete(struct auth *auth) 145{ 146 TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next); 147 148 free(auth->a_user); 149 free(auth->a_secret); 150 free(auth->a_mutual_user); 151 free(auth->a_mutual_secret); 152 free(auth); 153} 154 155const struct auth * 156auth_find(const struct auth_group *ag, const char *user) 157{ 158 const struct auth *auth; 159 160 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) { 161 if (strcmp(auth->a_user, user) == 0) 162 return (auth); 163 } 164 165 return (NULL); 166} 167 168static void 169auth_check_secret_length(struct auth *auth) 170{ 171 size_t len; 172 173 len = strlen(auth->a_secret); 174 if (len > 16) { 175 if (auth->a_auth_group->ag_name != NULL) 176 log_warnx("secret for user \"%s\", auth-group \"%s\", " 177 "is too long; it should be at most 16 characters " 178 "long", auth->a_user, auth->a_auth_group->ag_name); 179 else 180 log_warnx("secret for user \"%s\", target \"%s\", " 181 "is too long; it should be at most 16 characters " 182 "long", auth->a_user, 183 auth->a_auth_group->ag_target->t_name); 184 } 185 if (len < 12) { 186 if (auth->a_auth_group->ag_name != NULL) 187 log_warnx("secret for user \"%s\", auth-group \"%s\", " 188 "is too short; it should be at least 12 characters " 189 "long", auth->a_user, 190 auth->a_auth_group->ag_name); 191 else 192 log_warnx("secret for user \"%s\", target \"%s\", " 193 "is too short; it should be at least 16 characters " 194 "long", auth->a_user, 195 auth->a_auth_group->ag_target->t_name); 196 } 197 198 if (auth->a_mutual_secret != NULL) { 199 len = strlen(auth->a_secret); 200 if (len > 16) { 201 if (auth->a_auth_group->ag_name != NULL) 202 log_warnx("mutual secret for user \"%s\", " 203 "auth-group \"%s\", is too long; it should " 204 "be at most 16 characters long", 205 auth->a_user, auth->a_auth_group->ag_name); 206 else 207 log_warnx("mutual secret for user \"%s\", " 208 "target \"%s\", is too long; it should " 209 "be at most 16 characters long", 210 auth->a_user, 211 auth->a_auth_group->ag_target->t_name); 212 } 213 if (len < 12) { 214 if (auth->a_auth_group->ag_name != NULL) 215 log_warnx("mutual secret for user \"%s\", " 216 "auth-group \"%s\", is too short; it " 217 "should be at least 12 characters long", 218 auth->a_user, auth->a_auth_group->ag_name); 219 else 220 log_warnx("mutual secret for user \"%s\", " 221 "target \"%s\", is too short; it should be " 222 "at least 16 characters long", 223 auth->a_user, 224 auth->a_auth_group->ag_target->t_name); 225 } 226 } 227} 228 229const struct auth * 230auth_new_chap(struct auth_group *ag, const char *user, 231 const char *secret) 232{ 233 struct auth *auth; 234 235 if (ag->ag_type == AG_TYPE_UNKNOWN) 236 ag->ag_type = AG_TYPE_CHAP; 237 if (ag->ag_type != AG_TYPE_CHAP) { 238 if (ag->ag_name != NULL) 239 log_warnx("cannot mix \"chap\" authentication with " 240 "other types for auth-group \"%s\"", ag->ag_name); 241 else 242 log_warnx("cannot mix \"chap\" authentication with " 243 "other types for target \"%s\"", 244 ag->ag_target->t_name); 245 return (NULL); 246 } 247 248 auth = auth_new(ag); 249 auth->a_user = checked_strdup(user); 250 auth->a_secret = checked_strdup(secret); 251 252 auth_check_secret_length(auth); 253 254 return (auth); 255} 256 257const struct auth * 258auth_new_chap_mutual(struct auth_group *ag, const char *user, 259 const char *secret, const char *user2, const char *secret2) 260{ 261 struct auth *auth; 262 263 if (ag->ag_type == AG_TYPE_UNKNOWN) 264 ag->ag_type = AG_TYPE_CHAP_MUTUAL; 265 if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) { 266 if (ag->ag_name != NULL) 267 log_warnx("cannot mix \"chap-mutual\" authentication " 268 "with other types for auth-group \"%s\"", 269 ag->ag_name); 270 else 271 log_warnx("cannot mix \"chap-mutual\" authentication " 272 "with other types for target \"%s\"", 273 ag->ag_target->t_name); 274 return (NULL); 275 } 276 277 auth = auth_new(ag); 278 auth->a_user = checked_strdup(user); 279 auth->a_secret = checked_strdup(secret); 280 auth->a_mutual_user = checked_strdup(user2); 281 auth->a_mutual_secret = checked_strdup(secret2); 282 283 auth_check_secret_length(auth); 284 285 return (auth); 286} 287 288const struct auth_name * 289auth_name_new(struct auth_group *ag, const char *name) 290{ 291 struct auth_name *an; 292 293 an = calloc(1, sizeof(*an)); 294 if (an == NULL) 295 log_err(1, "calloc"); 296 an->an_auth_group = ag; 297 an->an_initator_name = checked_strdup(name); 298 TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next); 299 return (an); 300} 301 302static void 303auth_name_delete(struct auth_name *an) 304{ 305 TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next); 306 307 free(an->an_initator_name); 308 free(an); 309} 310 311bool 312auth_name_defined(const struct auth_group *ag) 313{ 314 if (TAILQ_EMPTY(&ag->ag_names)) 315 return (false); 316 return (true); 317} 318 319const struct auth_name * 320auth_name_find(const struct auth_group *ag, const char *name) 321{ 322 const struct auth_name *auth_name; 323 324 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) { 325 if (strcmp(auth_name->an_initator_name, name) == 0) 326 return (auth_name); 327 } 328 329 return (NULL); 330} 331 332int 333auth_name_check(const struct auth_group *ag, const char *initiator_name) 334{ 335 if (!auth_name_defined(ag)) 336 return (0); 337 338 if (auth_name_find(ag, initiator_name) == NULL) 339 return (1); 340 341 return (0); 342} 343 344const struct auth_portal * 345auth_portal_new(struct auth_group *ag, const char *portal) 346{ 347 struct auth_portal *ap; 348 char *net, *mask, *str, *tmp; 349 int len, dm, m; 350 351 ap = calloc(1, sizeof(*ap)); 352 if (ap == NULL) 353 log_err(1, "calloc"); 354 ap->ap_auth_group = ag; 355 ap->ap_initator_portal = checked_strdup(portal); 356 mask = str = checked_strdup(portal); 357 net = strsep(&mask, "/"); 358 if (net[0] == '[') 359 net++; 360 len = strlen(net); 361 if (len == 0) 362 goto error; 363 if (net[len - 1] == ']') 364 net[len - 1] = 0; 365 if (strchr(net, ':') != NULL) { 366 struct sockaddr_in6 *sin6 = 367 (struct sockaddr_in6 *)&ap->ap_sa; 368 369 sin6->sin6_len = sizeof(*sin6); 370 sin6->sin6_family = AF_INET6; 371 if (inet_pton(AF_INET6, net, &sin6->sin6_addr) <= 0) 372 goto error; 373 dm = 128; 374 } else { 375 struct sockaddr_in *sin = 376 (struct sockaddr_in *)&ap->ap_sa; 377 378 sin->sin_len = sizeof(*sin); 379 sin->sin_family = AF_INET; 380 if (inet_pton(AF_INET, net, &sin->sin_addr) <= 0) 381 goto error; 382 dm = 32; 383 } 384 if (mask != NULL) { 385 m = strtol(mask, &tmp, 0); 386 if (m < 0 || m > dm || tmp[0] != 0) 387 goto error; 388 } else 389 m = dm; 390 ap->ap_mask = m; 391 free(str); 392 TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next); 393 return (ap); 394 395error: 396 log_errx(1, "Incorrect initiator portal '%s'", portal); 397 return (NULL); 398} 399 400static void 401auth_portal_delete(struct auth_portal *ap) 402{ 403 TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next); 404 405 free(ap->ap_initator_portal); 406 free(ap); 407} 408 409bool 410auth_portal_defined(const struct auth_group *ag) 411{ 412 if (TAILQ_EMPTY(&ag->ag_portals)) 413 return (false); 414 return (true); 415} 416 417const struct auth_portal * 418auth_portal_find(const struct auth_group *ag, const struct sockaddr_storage *ss) 419{ 420 const struct auth_portal *ap; 421 const uint8_t *a, *b; 422 int i; 423 uint8_t bmask; 424 425 TAILQ_FOREACH(ap, &ag->ag_portals, ap_next) { 426 if (ap->ap_sa.ss_family != ss->ss_family) 427 continue; 428 if (ss->ss_family == AF_INET) { 429 a = (const uint8_t *) 430 &((const struct sockaddr_in *)ss)->sin_addr; 431 b = (const uint8_t *) 432 &((const struct sockaddr_in *)&ap->ap_sa)->sin_addr; 433 } else { 434 a = (const uint8_t *) 435 &((const struct sockaddr_in6 *)ss)->sin6_addr; 436 b = (const uint8_t *) 437 &((const struct sockaddr_in6 *)&ap->ap_sa)->sin6_addr; 438 } 439 for (i = 0; i < ap->ap_mask / 8; i++) { 440 if (a[i] != b[i]) 441 goto next; 442 } 443 if (ap->ap_mask % 8) { 444 bmask = 0xff << (8 - (ap->ap_mask % 8)); 445 if ((a[i] & bmask) != (b[i] & bmask)) 446 goto next; 447 } 448 return (ap); 449next: 450 ; 451 } 452 453 return (NULL); 454} 455 456int 457auth_portal_check(const struct auth_group *ag, const struct sockaddr_storage *sa) 458{ 459 460 if (!auth_portal_defined(ag)) 461 return (0); 462 463 if (auth_portal_find(ag, sa) == NULL) 464 return (1); 465 466 return (0); 467} 468 469struct auth_group * 470auth_group_new(struct conf *conf, const char *name) 471{ 472 struct auth_group *ag; 473 474 if (name != NULL) { 475 ag = auth_group_find(conf, name); 476 if (ag != NULL) { 477 log_warnx("duplicated auth-group \"%s\"", name); 478 return (NULL); 479 } 480 } 481 482 ag = calloc(1, sizeof(*ag)); 483 if (ag == NULL) 484 log_err(1, "calloc"); 485 if (name != NULL) 486 ag->ag_name = checked_strdup(name); 487 TAILQ_INIT(&ag->ag_auths); 488 TAILQ_INIT(&ag->ag_names); 489 TAILQ_INIT(&ag->ag_portals); 490 ag->ag_conf = conf; 491 TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next); 492 493 return (ag); 494} 495 496void 497auth_group_delete(struct auth_group *ag) 498{ 499 struct auth *auth, *auth_tmp; 500 struct auth_name *auth_name, *auth_name_tmp; 501 struct auth_portal *auth_portal, *auth_portal_tmp; 502 503 TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next); 504 505 TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp) 506 auth_delete(auth); 507 TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp) 508 auth_name_delete(auth_name); 509 TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next, 510 auth_portal_tmp) 511 auth_portal_delete(auth_portal); 512 free(ag->ag_name); 513 free(ag); 514} 515 516struct auth_group * 517auth_group_find(const struct conf *conf, const char *name) 518{ 519 struct auth_group *ag; 520 521 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 522 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0) 523 return (ag); 524 } 525 526 return (NULL); 527} 528 529int 530auth_group_set_type(struct auth_group *ag, const char *str) 531{ 532 int type; 533 534 if (strcmp(str, "none") == 0) { 535 type = AG_TYPE_NO_AUTHENTICATION; 536 } else if (strcmp(str, "deny") == 0) { 537 type = AG_TYPE_DENY; 538 } else if (strcmp(str, "chap") == 0) { 539 type = AG_TYPE_CHAP; 540 } else if (strcmp(str, "chap-mutual") == 0) { 541 type = AG_TYPE_CHAP_MUTUAL; 542 } else { 543 if (ag->ag_name != NULL) 544 log_warnx("invalid auth-type \"%s\" for auth-group " 545 "\"%s\"", str, ag->ag_name); 546 else 547 log_warnx("invalid auth-type \"%s\" for target " 548 "\"%s\"", str, ag->ag_target->t_name); 549 return (1); 550 } 551 552 if (ag->ag_type != AG_TYPE_UNKNOWN && ag->ag_type != type) { 553 if (ag->ag_name != NULL) { 554 log_warnx("cannot set auth-type to \"%s\" for " 555 "auth-group \"%s\"; already has a different " 556 "type", str, ag->ag_name); 557 } else { 558 log_warnx("cannot set auth-type to \"%s\" for target " 559 "\"%s\"; already has a different type", 560 str, ag->ag_target->t_name); 561 } 562 return (1); 563 } 564 565 ag->ag_type = type; 566 567 return (0); 568} 569 570static struct portal * 571portal_new(struct portal_group *pg) 572{ 573 struct portal *portal; 574 575 portal = calloc(1, sizeof(*portal)); 576 if (portal == NULL) 577 log_err(1, "calloc"); 578 TAILQ_INIT(&portal->p_targets); 579 portal->p_portal_group = pg; 580 TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next); 581 return (portal); 582} 583 584static void 585portal_delete(struct portal *portal) 586{ 587 588 TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next); 589 if (portal->p_ai != NULL) 590 freeaddrinfo(portal->p_ai); 591 free(portal->p_listen); 592 free(portal); 593} 594 595struct portal_group * 596portal_group_new(struct conf *conf, const char *name) 597{ 598 struct portal_group *pg; 599 600 pg = portal_group_find(conf, name); 601 if (pg != NULL) { 602 log_warnx("duplicated portal-group \"%s\"", name); 603 return (NULL); 604 } 605 606 pg = calloc(1, sizeof(*pg)); 607 if (pg == NULL) 608 log_err(1, "calloc"); 609 pg->pg_name = checked_strdup(name); 610 TAILQ_INIT(&pg->pg_portals); 611 pg->pg_conf = conf; 612 conf->conf_last_portal_group_tag++; 613 pg->pg_tag = conf->conf_last_portal_group_tag; 614 TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next); 615 616 return (pg); 617} 618 619void 620portal_group_delete(struct portal_group *pg) 621{ 622 struct portal *portal, *tmp; 623 624 TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next); 625 626 TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp) 627 portal_delete(portal); 628 free(pg->pg_name); 629 free(pg->pg_redirection); 630 free(pg); 631} 632 633struct portal_group * 634portal_group_find(const struct conf *conf, const char *name) 635{ 636 struct portal_group *pg; 637 638 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 639 if (strcmp(pg->pg_name, name) == 0) 640 return (pg); 641 } 642 643 return (NULL); 644} 645 646static int 647parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai) 648{ 649 struct addrinfo hints; 650 char *str, *addr, *ch; 651 const char *port; 652 int error, colons = 0; 653 654 str = arg = strdup(arg); 655 if (arg[0] == '[') { 656 /* 657 * IPv6 address in square brackets, perhaps with port. 658 */ 659 arg++; 660 addr = strsep(&arg, "]"); 661 if (arg == NULL) 662 return (1); 663 if (arg[0] == '\0') { 664 port = def_port; 665 } else if (arg[0] == ':') { 666 port = arg + 1; 667 } else { 668 free(str); 669 return (1); 670 } 671 } else { 672 /* 673 * Either IPv6 address without brackets - and without 674 * a port - or IPv4 address. Just count the colons. 675 */ 676 for (ch = arg; *ch != '\0'; ch++) { 677 if (*ch == ':') 678 colons++; 679 } 680 if (colons > 1) { 681 addr = arg; 682 port = def_port; 683 } else { 684 addr = strsep(&arg, ":"); 685 if (arg == NULL) 686 port = def_port; 687 else 688 port = arg; 689 } 690 } 691 692 memset(&hints, 0, sizeof(hints)); 693 hints.ai_family = PF_UNSPEC; 694 hints.ai_socktype = SOCK_STREAM; 695 hints.ai_flags = AI_PASSIVE; 696 error = getaddrinfo(addr, port, &hints, ai); 697 free(str); 698 return ((error != 0) ? 1 : 0); 699} 700 701int 702portal_group_add_listen(struct portal_group *pg, const char *value, bool iser) 703{ 704 struct portal *portal; 705 706 portal = portal_new(pg); 707 portal->p_listen = checked_strdup(value); 708 portal->p_iser = iser; 709 710 if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) { 711 log_warnx("invalid listen address %s", portal->p_listen); 712 portal_delete(portal); 713 return (1); 714 } 715 716 /* 717 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 718 * those into multiple portals. 719 */ 720 721 return (0); 722} 723 724int 725isns_new(struct conf *conf, const char *addr) 726{ 727 struct isns *isns; 728 729 isns = calloc(1, sizeof(*isns)); 730 if (isns == NULL) 731 log_err(1, "calloc"); 732 isns->i_conf = conf; 733 TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next); 734 isns->i_addr = checked_strdup(addr); 735 736 if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) { 737 log_warnx("invalid iSNS address %s", isns->i_addr); 738 isns_delete(isns); 739 return (1); 740 } 741 742 /* 743 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 744 * those into multiple servers. 745 */ 746 747 return (0); 748} 749 750void 751isns_delete(struct isns *isns) 752{ 753 754 TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next); 755 free(isns->i_addr); 756 if (isns->i_ai != NULL) 757 freeaddrinfo(isns->i_ai); 758 free(isns); 759} 760 761static int 762isns_do_connect(struct isns *isns) 763{ 764 int s; 765 766 s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype, 767 isns->i_ai->ai_protocol); 768 if (s < 0) { 769 log_warn("socket(2) failed for %s", isns->i_addr); 770 return (-1); 771 } 772 if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) { 773 log_warn("connect(2) failed for %s", isns->i_addr); 774 close(s); 775 return (-1); 776 } 777 return(s); 778} 779 780static int 781isns_do_register(struct isns *isns, int s, const char *hostname) 782{ 783 struct conf *conf = isns->i_conf; 784 struct target *target; 785 struct portal *portal; 786 struct portal_group *pg; 787 struct isns_req *req; 788 int res = 0; 789 uint32_t error; 790 791 req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT); 792 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 793 isns_req_add_delim(req); 794 isns_req_add_str(req, 1, hostname); 795 isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */ 796 isns_req_add_32(req, 6, conf->conf_isns_period); 797 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 798 if (pg->pg_unassigned) 799 continue; 800 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 801 isns_req_add_addr(req, 16, portal->p_ai); 802 isns_req_add_port(req, 17, portal->p_ai); 803 } 804 } 805 TAILQ_FOREACH(target, &conf->conf_targets, t_next) { 806 isns_req_add_str(req, 32, target->t_name); 807 isns_req_add_32(req, 33, 1); /* 1 -- Target*/ 808 if (target->t_alias != NULL) 809 isns_req_add_str(req, 34, target->t_alias); 810 pg = target->t_portal_group; 811 isns_req_add_32(req, 51, pg->pg_tag); 812 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 813 isns_req_add_addr(req, 49, portal->p_ai); 814 isns_req_add_port(req, 50, portal->p_ai); 815 } 816 } 817 res = isns_req_send(s, req); 818 if (res < 0) { 819 log_warn("send(2) failed for %s", isns->i_addr); 820 goto quit; 821 } 822 res = isns_req_receive(s, req); 823 if (res < 0) { 824 log_warn("receive(2) failed for %s", isns->i_addr); 825 goto quit; 826 } 827 error = isns_req_get_status(req); 828 if (error != 0) { 829 log_warnx("iSNS register error %d for %s", error, isns->i_addr); 830 res = -1; 831 } 832quit: 833 isns_req_free(req); 834 return (res); 835} 836 837static int 838isns_do_check(struct isns *isns, int s, const char *hostname) 839{ 840 struct conf *conf = isns->i_conf; 841 struct isns_req *req; 842 int res = 0; 843 uint32_t error; 844 845 req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT); 846 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 847 isns_req_add_str(req, 1, hostname); 848 isns_req_add_delim(req); 849 isns_req_add(req, 2, 0, NULL); 850 res = isns_req_send(s, req); 851 if (res < 0) { 852 log_warn("send(2) failed for %s", isns->i_addr); 853 goto quit; 854 } 855 res = isns_req_receive(s, req); 856 if (res < 0) { 857 log_warn("receive(2) failed for %s", isns->i_addr); 858 goto quit; 859 } 860 error = isns_req_get_status(req); 861 if (error != 0) { 862 log_warnx("iSNS check error %d for %s", error, isns->i_addr); 863 res = -1; 864 } 865quit: 866 isns_req_free(req); 867 return (res); 868} 869 870static int 871isns_do_deregister(struct isns *isns, int s, const char *hostname) 872{ 873 struct conf *conf = isns->i_conf; 874 struct isns_req *req; 875 int res = 0; 876 uint32_t error; 877 878 req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT); 879 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 880 isns_req_add_delim(req); 881 isns_req_add_str(req, 1, hostname); 882 res = isns_req_send(s, req); 883 if (res < 0) { 884 log_warn("send(2) failed for %s", isns->i_addr); 885 goto quit; 886 } 887 res = isns_req_receive(s, req); 888 if (res < 0) { 889 log_warn("receive(2) failed for %s", isns->i_addr); 890 goto quit; 891 } 892 error = isns_req_get_status(req); 893 if (error != 0) { 894 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr); 895 res = -1; 896 } 897quit: 898 isns_req_free(req); 899 return (res); 900} 901 902void 903isns_register(struct isns *isns, struct isns *oldisns) 904{ 905 struct conf *conf = isns->i_conf; 906 int s; 907 char hostname[256]; 908 909 if (TAILQ_EMPTY(&conf->conf_targets) || 910 TAILQ_EMPTY(&conf->conf_portal_groups)) 911 return; 912 set_timeout(conf->conf_isns_timeout, false); 913 s = isns_do_connect(isns); 914 if (s < 0) { 915 set_timeout(0, false); 916 return; 917 } 918 gethostname(hostname, sizeof(hostname)); 919 920 if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets)) 921 oldisns = isns; 922 isns_do_deregister(oldisns, s, hostname); 923 isns_do_register(isns, s, hostname); 924 close(s); 925 set_timeout(0, false); 926} 927 928void 929isns_check(struct isns *isns) 930{ 931 struct conf *conf = isns->i_conf; 932 int s, res; 933 char hostname[256]; 934 935 if (TAILQ_EMPTY(&conf->conf_targets) || 936 TAILQ_EMPTY(&conf->conf_portal_groups)) 937 return; 938 set_timeout(conf->conf_isns_timeout, false); 939 s = isns_do_connect(isns); 940 if (s < 0) { 941 set_timeout(0, false); 942 return; 943 } 944 gethostname(hostname, sizeof(hostname)); 945 946 res = isns_do_check(isns, s, hostname); 947 if (res < 0) { 948 isns_do_deregister(isns, s, hostname); 949 isns_do_register(isns, s, hostname); 950 } 951 close(s); 952 set_timeout(0, false); 953} 954 955void 956isns_deregister(struct isns *isns) 957{ 958 struct conf *conf = isns->i_conf; 959 int s; 960 char hostname[256]; 961 962 if (TAILQ_EMPTY(&conf->conf_targets) || 963 TAILQ_EMPTY(&conf->conf_portal_groups)) 964 return; 965 set_timeout(conf->conf_isns_timeout, false); 966 s = isns_do_connect(isns); 967 if (s < 0) 968 return; 969 gethostname(hostname, sizeof(hostname)); 970 971 isns_do_deregister(isns, s, hostname); 972 close(s); 973 set_timeout(0, false); 974} 975 976int 977portal_group_set_filter(struct portal_group *pg, const char *str) 978{ 979 int filter; 980 981 if (strcmp(str, "none") == 0) { 982 filter = PG_FILTER_NONE; 983 } else if (strcmp(str, "portal") == 0) { 984 filter = PG_FILTER_PORTAL; 985 } else if (strcmp(str, "portal-name") == 0) { 986 filter = PG_FILTER_PORTAL_NAME; 987 } else if (strcmp(str, "portal-name-auth") == 0) { 988 filter = PG_FILTER_PORTAL_NAME_AUTH; 989 } else { 990 log_warnx("invalid discovery-filter \"%s\" for portal-group " 991 "\"%s\"; valid values are \"none\", \"portal\", " 992 "\"portal-name\", and \"portal-name-auth\"", 993 str, pg->pg_name); 994 return (1); 995 } 996 997 if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN && 998 pg->pg_discovery_filter != filter) { 999 log_warnx("cannot set discovery-filter to \"%s\" for " 1000 "portal-group \"%s\"; already has a different " 1001 "value", str, pg->pg_name); 1002 return (1); 1003 } 1004 1005 pg->pg_discovery_filter = filter; 1006 1007 return (0); 1008} 1009 1010int 1011portal_group_set_redirection(struct portal_group *pg, const char *addr) 1012{ 1013 1014 if (pg->pg_redirection != NULL) { 1015 log_warnx("cannot set redirection to \"%s\" for " 1016 "portal-group \"%s\"; already defined", 1017 addr, pg->pg_name); 1018 return (1); 1019 } 1020 1021 pg->pg_redirection = checked_strdup(addr); 1022 1023 return (0); 1024} 1025 1026static bool 1027valid_hex(const char ch) 1028{ 1029 switch (ch) { 1030 case '0': 1031 case '1': 1032 case '2': 1033 case '3': 1034 case '4': 1035 case '5': 1036 case '6': 1037 case '7': 1038 case '8': 1039 case '9': 1040 case 'a': 1041 case 'A': 1042 case 'b': 1043 case 'B': 1044 case 'c': 1045 case 'C': 1046 case 'd': 1047 case 'D': 1048 case 'e': 1049 case 'E': 1050 case 'f': 1051 case 'F': 1052 return (true); 1053 default: 1054 return (false); 1055 } 1056} 1057 1058bool 1059valid_iscsi_name(const char *name) 1060{ 1061 int i; 1062 1063 if (strlen(name) >= MAX_NAME_LEN) { 1064 log_warnx("overlong name for target \"%s\"; max length allowed " 1065 "by iSCSI specification is %d characters", 1066 name, MAX_NAME_LEN); 1067 return (false); 1068 } 1069 1070 /* 1071 * In the cases below, we don't return an error, just in case the admin 1072 * was right, and we're wrong. 1073 */ 1074 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) { 1075 for (i = strlen("iqn."); name[i] != '\0'; i++) { 1076 /* 1077 * XXX: We should verify UTF-8 normalisation, as defined 1078 * by 3.2.6.2: iSCSI Name Encoding. 1079 */ 1080 if (isalnum(name[i])) 1081 continue; 1082 if (name[i] == '-' || name[i] == '.' || name[i] == ':') 1083 continue; 1084 log_warnx("invalid character \"%c\" in target name " 1085 "\"%s\"; allowed characters are letters, digits, " 1086 "'-', '.', and ':'", name[i], name); 1087 break; 1088 } 1089 /* 1090 * XXX: Check more stuff: valid date and a valid reversed domain. 1091 */ 1092 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) { 1093 if (strlen(name) != strlen("eui.") + 16) 1094 log_warnx("invalid target name \"%s\"; the \"eui.\" " 1095 "should be followed by exactly 16 hexadecimal " 1096 "digits", name); 1097 for (i = strlen("eui."); name[i] != '\0'; i++) { 1098 if (!valid_hex(name[i])) { 1099 log_warnx("invalid character \"%c\" in target " 1100 "name \"%s\"; allowed characters are 1-9 " 1101 "and A-F", name[i], name); 1102 break; 1103 } 1104 } 1105 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) { 1106 if (strlen(name) > strlen("naa.") + 32) 1107 log_warnx("invalid target name \"%s\"; the \"naa.\" " 1108 "should be followed by at most 32 hexadecimal " 1109 "digits", name); 1110 for (i = strlen("naa."); name[i] != '\0'; i++) { 1111 if (!valid_hex(name[i])) { 1112 log_warnx("invalid character \"%c\" in target " 1113 "name \"%s\"; allowed characters are 1-9 " 1114 "and A-F", name[i], name); 1115 break; 1116 } 1117 } 1118 } else { 1119 log_warnx("invalid target name \"%s\"; should start with " 1120 "either \".iqn\", \"eui.\", or \"naa.\"", 1121 name); 1122 } 1123 return (true); 1124} 1125 1126struct target * 1127target_new(struct conf *conf, const char *name) 1128{ 1129 struct target *targ; 1130 int i, len; 1131 1132 targ = target_find(conf, name); 1133 if (targ != NULL) { 1134 log_warnx("duplicated target \"%s\"", name); 1135 return (NULL); 1136 } 1137 if (valid_iscsi_name(name) == false) { 1138 log_warnx("target name \"%s\" is invalid", name); 1139 return (NULL); 1140 } 1141 targ = calloc(1, sizeof(*targ)); 1142 if (targ == NULL) 1143 log_err(1, "calloc"); 1144 targ->t_name = checked_strdup(name); 1145 1146 /* 1147 * RFC 3722 requires us to normalize the name to lowercase. 1148 */ 1149 len = strlen(name); 1150 for (i = 0; i < len; i++) 1151 targ->t_name[i] = tolower(targ->t_name[i]); 1152 1153 targ->t_conf = conf; 1154 TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next); 1155 1156 return (targ); 1157} 1158 1159void 1160target_delete(struct target *targ) 1161{ 1162 1163 TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next); 1164 1165 free(targ->t_name); 1166 free(targ->t_redirection); 1167 free(targ); 1168} 1169 1170struct target * 1171target_find(struct conf *conf, const char *name) 1172{ 1173 struct target *targ; 1174 1175 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1176 if (strcasecmp(targ->t_name, name) == 0) 1177 return (targ); 1178 } 1179 1180 return (NULL); 1181} 1182 1183int 1184target_set_redirection(struct target *target, const char *addr) 1185{ 1186 1187 if (target->t_redirection != NULL) { 1188 log_warnx("cannot set redirection to \"%s\" for " 1189 "target \"%s\"; already defined", 1190 addr, target->t_name); 1191 return (1); 1192 } 1193 1194 target->t_redirection = checked_strdup(addr); 1195 1196 return (0); 1197} 1198 1199void 1200target_set_ctl_port(struct target *target, uint32_t value) 1201{ 1202 1203 target->t_ctl_port = value; 1204} 1205 1206struct lun * 1207lun_new(struct conf *conf, const char *name) 1208{ 1209 struct lun *lun; 1210 1211 lun = lun_find(conf, name); 1212 if (lun != NULL) { 1213 log_warnx("duplicated lun \"%s\"", name); 1214 return (NULL); 1215 } 1216 1217 lun = calloc(1, sizeof(*lun)); 1218 if (lun == NULL) 1219 log_err(1, "calloc"); 1220 lun->l_conf = conf; 1221 lun->l_name = checked_strdup(name); 1222 TAILQ_INIT(&lun->l_options); 1223 TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next); 1224 1225 return (lun); 1226} 1227 1228void 1229lun_delete(struct lun *lun) 1230{ 1231 struct target *targ; 1232 struct lun_option *lo, *tmp; 1233 int i; 1234 1235 TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) { 1236 for (i = 0; i < MAX_LUNS; i++) { 1237 if (targ->t_luns[i] == lun) 1238 targ->t_luns[i] = NULL; 1239 } 1240 } 1241 TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next); 1242 1243 TAILQ_FOREACH_SAFE(lo, &lun->l_options, lo_next, tmp) 1244 lun_option_delete(lo); 1245 free(lun->l_name); 1246 free(lun->l_backend); 1247 free(lun->l_device_id); 1248 free(lun->l_path); 1249 free(lun->l_scsiname); 1250 free(lun->l_serial); 1251 free(lun); 1252} 1253 1254struct lun * 1255lun_find(const struct conf *conf, const char *name) 1256{ 1257 struct lun *lun; 1258 1259 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1260 if (strcmp(lun->l_name, name) == 0) 1261 return (lun); 1262 } 1263 1264 return (NULL); 1265} 1266 1267void 1268lun_set_backend(struct lun *lun, const char *value) 1269{ 1270 free(lun->l_backend); 1271 lun->l_backend = checked_strdup(value); 1272} 1273 1274void 1275lun_set_blocksize(struct lun *lun, size_t value) 1276{ 1277 1278 lun->l_blocksize = value; 1279} 1280 1281void 1282lun_set_device_id(struct lun *lun, const char *value) 1283{ 1284 free(lun->l_device_id); 1285 lun->l_device_id = checked_strdup(value); 1286} 1287 1288void 1289lun_set_path(struct lun *lun, const char *value) 1290{ 1291 free(lun->l_path); 1292 lun->l_path = checked_strdup(value); 1293} 1294 1295void 1296lun_set_scsiname(struct lun *lun, const char *value) 1297{ 1298 free(lun->l_scsiname); 1299 lun->l_scsiname = checked_strdup(value); 1300} 1301 1302void 1303lun_set_serial(struct lun *lun, const char *value) 1304{ 1305 free(lun->l_serial); 1306 lun->l_serial = checked_strdup(value); 1307} 1308 1309void 1310lun_set_size(struct lun *lun, size_t value) 1311{ 1312 1313 lun->l_size = value; 1314} 1315 1316void 1317lun_set_ctl_lun(struct lun *lun, uint32_t value) 1318{ 1319 1320 lun->l_ctl_lun = value; 1321} 1322 1323struct lun_option * 1324lun_option_new(struct lun *lun, const char *name, const char *value) 1325{ 1326 struct lun_option *lo; 1327 1328 lo = lun_option_find(lun, name); 1329 if (lo != NULL) { 1330 log_warnx("duplicated lun option \"%s\" for lun \"%s\"", 1331 name, lun->l_name); 1332 return (NULL); 1333 } 1334 1335 lo = calloc(1, sizeof(*lo)); 1336 if (lo == NULL) 1337 log_err(1, "calloc"); 1338 lo->lo_name = checked_strdup(name); 1339 lo->lo_value = checked_strdup(value); 1340 lo->lo_lun = lun; 1341 TAILQ_INSERT_TAIL(&lun->l_options, lo, lo_next); 1342 1343 return (lo); 1344} 1345 1346void 1347lun_option_delete(struct lun_option *lo) 1348{ 1349 1350 TAILQ_REMOVE(&lo->lo_lun->l_options, lo, lo_next); 1351 1352 free(lo->lo_name); 1353 free(lo->lo_value); 1354 free(lo); 1355} 1356 1357struct lun_option * 1358lun_option_find(const struct lun *lun, const char *name) 1359{ 1360 struct lun_option *lo; 1361 1362 TAILQ_FOREACH(lo, &lun->l_options, lo_next) { 1363 if (strcmp(lo->lo_name, name) == 0) 1364 return (lo); 1365 } 1366 1367 return (NULL); 1368} 1369 1370void 1371lun_option_set(struct lun_option *lo, const char *value) 1372{ 1373 1374 free(lo->lo_value); 1375 lo->lo_value = checked_strdup(value); 1376} 1377 1378static struct connection * 1379connection_new(struct portal *portal, int fd, const char *host, 1380 const struct sockaddr *client_sa) 1381{ 1382 struct connection *conn; 1383 1384 conn = calloc(1, sizeof(*conn)); 1385 if (conn == NULL) 1386 log_err(1, "calloc"); 1387 conn->conn_portal = portal; 1388 conn->conn_socket = fd; 1389 conn->conn_initiator_addr = checked_strdup(host); 1390 memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len); 1391 1392 /* 1393 * Default values, from RFC 3720, section 12. 1394 */ 1395 conn->conn_max_data_segment_length = 8192; 1396 conn->conn_max_burst_length = 262144; 1397 conn->conn_immediate_data = true; 1398 1399 return (conn); 1400} 1401 1402#if 0 1403static void 1404conf_print(struct conf *conf) 1405{ 1406 struct auth_group *ag; 1407 struct auth *auth; 1408 struct auth_name *auth_name; 1409 struct auth_portal *auth_portal; 1410 struct portal_group *pg; 1411 struct portal *portal; 1412 struct target *targ; 1413 struct lun *lun; 1414 struct lun_option *lo; 1415 1416 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1417 fprintf(stderr, "auth-group %s {\n", ag->ag_name); 1418 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) 1419 fprintf(stderr, "\t chap-mutual %s %s %s %s\n", 1420 auth->a_user, auth->a_secret, 1421 auth->a_mutual_user, auth->a_mutual_secret); 1422 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) 1423 fprintf(stderr, "\t initiator-name %s\n", 1424 auth_name->an_initator_name); 1425 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next) 1426 fprintf(stderr, "\t initiator-portal %s\n", 1427 auth_portal->an_initator_portal); 1428 fprintf(stderr, "}\n"); 1429 } 1430 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1431 fprintf(stderr, "portal-group %s {\n", pg->pg_name); 1432 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 1433 fprintf(stderr, "\t listen %s\n", portal->p_listen); 1434 fprintf(stderr, "}\n"); 1435 } 1436 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1437 fprintf(stderr, "\tlun %s {\n", lun->l_name); 1438 fprintf(stderr, "\t\tpath %s\n", lun->l_path); 1439 TAILQ_FOREACH(lo, &lun->l_options, lo_next) 1440 fprintf(stderr, "\t\toption %s %s\n", 1441 lo->lo_name, lo->lo_value); 1442 fprintf(stderr, "\t}\n"); 1443 } 1444 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1445 fprintf(stderr, "target %s {\n", targ->t_name); 1446 if (targ->t_alias != NULL) 1447 fprintf(stderr, "\t alias %s\n", targ->t_alias); 1448 fprintf(stderr, "}\n"); 1449 } 1450} 1451#endif 1452 1453static int 1454conf_verify_lun(struct lun *lun) 1455{ 1456 const struct lun *lun2; 1457 1458 if (lun->l_backend == NULL) 1459 lun_set_backend(lun, "block"); 1460 if (strcmp(lun->l_backend, "block") == 0) { 1461 if (lun->l_path == NULL) { 1462 log_warnx("missing path for lun \"%s\"", 1463 lun->l_name); 1464 return (1); 1465 } 1466 } else if (strcmp(lun->l_backend, "ramdisk") == 0) { 1467 if (lun->l_size == 0) { 1468 log_warnx("missing size for ramdisk-backed lun \"%s\"", 1469 lun->l_name); 1470 return (1); 1471 } 1472 if (lun->l_path != NULL) { 1473 log_warnx("path must not be specified " 1474 "for ramdisk-backed lun \"%s\"", 1475 lun->l_name); 1476 return (1); 1477 } 1478 } 1479 if (lun->l_blocksize == 0) { 1480 lun_set_blocksize(lun, DEFAULT_BLOCKSIZE); 1481 } else if (lun->l_blocksize < 0) { 1482 log_warnx("invalid blocksize for lun \"%s\"; " 1483 "must be larger than 0", lun->l_name); 1484 return (1); 1485 } 1486 if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) { 1487 log_warnx("invalid size for lun \"%s\"; " 1488 "must be multiple of blocksize", lun->l_name); 1489 return (1); 1490 } 1491 TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) { 1492 if (lun == lun2) 1493 continue; 1494 if (lun->l_path != NULL && lun2->l_path != NULL && 1495 strcmp(lun->l_path, lun2->l_path) == 0) { 1496 log_debugx("WARNING: path \"%s\" duplicated " 1497 "between lun \"%s\", and " 1498 "lun \"%s\"", lun->l_path, 1499 lun->l_name, lun2->l_name); 1500 } 1501 } 1502 1503 return (0); 1504} 1505 1506int 1507conf_verify(struct conf *conf) 1508{ 1509 struct auth_group *ag; 1510 struct portal_group *pg; 1511 struct target *targ; 1512 struct lun *lun; 1513 bool found; 1514 int error, i; 1515 1516 if (conf->conf_pidfile_path == NULL) 1517 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE); 1518 1519 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1520 error = conf_verify_lun(lun); 1521 if (error != 0) 1522 return (error); 1523 } 1524 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1525 if (targ->t_auth_group == NULL) { 1526 targ->t_auth_group = auth_group_find(conf, 1527 "default"); 1528 assert(targ->t_auth_group != NULL); 1529 } 1530 if (targ->t_portal_group == NULL) { 1531 targ->t_portal_group = portal_group_find(conf, 1532 "default"); 1533 assert(targ->t_portal_group != NULL); 1534 } 1535 found = false; 1536 for (i = 0; i < MAX_LUNS; i++) { 1537 if (targ->t_luns[i] != NULL) 1538 found = true; 1539 } 1540 if (!found && targ->t_redirection == NULL) { 1541 log_warnx("no LUNs defined for target \"%s\"", 1542 targ->t_name); 1543 } 1544 if (found && targ->t_redirection != NULL) { 1545 log_debugx("target \"%s\" contains luns, " 1546 " but configured for redirection", 1547 targ->t_name); 1548 } 1549 } 1550 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1551 assert(pg->pg_name != NULL); 1552 if (pg->pg_discovery_auth_group == NULL) { 1553 pg->pg_discovery_auth_group = 1554 auth_group_find(conf, "default"); 1555 assert(pg->pg_discovery_auth_group != NULL); 1556 } 1557 1558 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN) 1559 pg->pg_discovery_filter = PG_FILTER_NONE; 1560 1561 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1562 if (targ->t_portal_group == pg) 1563 break; 1564 } 1565 if (pg->pg_redirection != NULL) { 1566 if (targ != NULL) { 1567 log_debugx("portal-group \"%s\" assigned " 1568 "to target \"%s\", but configured " 1569 "for redirection", 1570 pg->pg_name, targ->t_name); 1571 } 1572 pg->pg_unassigned = false; 1573 } else if (targ != NULL) { 1574 pg->pg_unassigned = false; 1575 } else { 1576 if (strcmp(pg->pg_name, "default") != 0) 1577 log_warnx("portal-group \"%s\" not assigned " 1578 "to any target", pg->pg_name); 1579 pg->pg_unassigned = true; 1580 } 1581 } 1582 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1583 if (ag->ag_name == NULL) 1584 assert(ag->ag_target != NULL); 1585 else 1586 assert(ag->ag_target == NULL); 1587 1588 found = false; 1589 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1590 if (targ->t_auth_group == ag) { 1591 found = true; 1592 break; 1593 } 1594 } 1595 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1596 if (pg->pg_discovery_auth_group == ag) { 1597 found = true; 1598 break; 1599 } 1600 } 1601 if (!found && ag->ag_name != NULL && 1602 strcmp(ag->ag_name, "default") != 0 && 1603 strcmp(ag->ag_name, "no-authentication") != 0 && 1604 strcmp(ag->ag_name, "no-access") != 0) { 1605 log_warnx("auth-group \"%s\" not assigned " 1606 "to any target", ag->ag_name); 1607 } 1608 } 1609 1610 return (0); 1611} 1612 1613static int 1614conf_apply(struct conf *oldconf, struct conf *newconf) 1615{ 1616 struct target *oldtarg, *newtarg, *tmptarg; 1617 struct lun *oldlun, *newlun, *tmplun; 1618 struct portal_group *oldpg, *newpg; 1619 struct portal *oldp, *newp; 1620 struct isns *oldns, *newns; 1621 pid_t otherpid; 1622 int changed, cumulated_error = 0, error, sockbuf; 1623 int one = 1; 1624 1625 if (oldconf->conf_debug != newconf->conf_debug) { 1626 log_debugx("changing debug level to %d", newconf->conf_debug); 1627 log_init(newconf->conf_debug); 1628 } 1629 1630 if (oldconf->conf_pidfh != NULL) { 1631 assert(oldconf->conf_pidfile_path != NULL); 1632 if (newconf->conf_pidfile_path != NULL && 1633 strcmp(oldconf->conf_pidfile_path, 1634 newconf->conf_pidfile_path) == 0) { 1635 newconf->conf_pidfh = oldconf->conf_pidfh; 1636 oldconf->conf_pidfh = NULL; 1637 } else { 1638 log_debugx("removing pidfile %s", 1639 oldconf->conf_pidfile_path); 1640 pidfile_remove(oldconf->conf_pidfh); 1641 oldconf->conf_pidfh = NULL; 1642 } 1643 } 1644 1645 if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) { 1646 log_debugx("opening pidfile %s", newconf->conf_pidfile_path); 1647 newconf->conf_pidfh = 1648 pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid); 1649 if (newconf->conf_pidfh == NULL) { 1650 if (errno == EEXIST) 1651 log_errx(1, "daemon already running, pid: %jd.", 1652 (intmax_t)otherpid); 1653 log_err(1, "cannot open or create pidfile \"%s\"", 1654 newconf->conf_pidfile_path); 1655 } 1656 } 1657 1658 /* Deregister on removed iSNS servers. */ 1659 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) { 1660 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) { 1661 if (strcmp(oldns->i_addr, newns->i_addr) == 0) 1662 break; 1663 } 1664 if (newns == NULL) 1665 isns_deregister(oldns); 1666 } 1667 1668 /* 1669 * XXX: If target or lun removal fails, we should somehow "move" 1670 * the old lun or target into newconf, so that subsequent 1671 * conf_apply() would try to remove them again. That would 1672 * be somewhat hairy, though, and lun deletion failures don't 1673 * really happen, so leave it as it is for now. 1674 */ 1675 /* 1676 * First, remove any targets present in the old configuration 1677 * and missing in the new one. 1678 */ 1679 TAILQ_FOREACH_SAFE(oldtarg, &oldconf->conf_targets, t_next, tmptarg) { 1680 newtarg = target_find(newconf, oldtarg->t_name); 1681 if (newtarg != NULL) 1682 continue; 1683 error = kernel_port_remove(oldtarg); 1684 if (error != 0) { 1685 log_warnx("failed to remove target %s", 1686 oldtarg->t_name); 1687 /* 1688 * XXX: Uncomment after fixing the root cause. 1689 * 1690 * cumulated_error++; 1691 */ 1692 } 1693 } 1694 1695 /* 1696 * Second, remove any LUNs present in the old configuration 1697 * and missing in the new one. 1698 */ 1699 TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) { 1700 newlun = lun_find(newconf, oldlun->l_name); 1701 if (newlun == NULL) { 1702 log_debugx("lun \"%s\", CTL lun %d " 1703 "not found in new configuration; " 1704 "removing", oldlun->l_name, oldlun->l_ctl_lun); 1705 error = kernel_lun_remove(oldlun); 1706 if (error != 0) { 1707 log_warnx("failed to remove lun \"%s\", " 1708 "CTL lun %d", 1709 oldlun->l_name, oldlun->l_ctl_lun); 1710 cumulated_error++; 1711 } 1712 continue; 1713 } 1714 1715 /* 1716 * Also remove the LUNs changed by more than size. 1717 */ 1718 changed = 0; 1719 assert(oldlun->l_backend != NULL); 1720 assert(newlun->l_backend != NULL); 1721 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) { 1722 log_debugx("backend for lun \"%s\", " 1723 "CTL lun %d changed; removing", 1724 oldlun->l_name, oldlun->l_ctl_lun); 1725 changed = 1; 1726 } 1727 if (oldlun->l_blocksize != newlun->l_blocksize) { 1728 log_debugx("blocksize for lun \"%s\", " 1729 "CTL lun %d changed; removing", 1730 oldlun->l_name, oldlun->l_ctl_lun); 1731 changed = 1; 1732 } 1733 if (newlun->l_device_id != NULL && 1734 (oldlun->l_device_id == NULL || 1735 strcmp(oldlun->l_device_id, newlun->l_device_id) != 1736 0)) { 1737 log_debugx("device-id for lun \"%s\", " 1738 "CTL lun %d changed; removing", 1739 oldlun->l_name, oldlun->l_ctl_lun); 1740 changed = 1; 1741 } 1742 if (newlun->l_path != NULL && 1743 (oldlun->l_path == NULL || 1744 strcmp(oldlun->l_path, newlun->l_path) != 0)) { 1745 log_debugx("path for lun \"%s\", " 1746 "CTL lun %d, changed; removing", 1747 oldlun->l_name, oldlun->l_ctl_lun); 1748 changed = 1; 1749 } 1750 if (newlun->l_serial != NULL && 1751 (oldlun->l_serial == NULL || 1752 strcmp(oldlun->l_serial, newlun->l_serial) != 0)) { 1753 log_debugx("serial for lun \"%s\", " 1754 "CTL lun %d changed; removing", 1755 oldlun->l_name, oldlun->l_ctl_lun); 1756 changed = 1; 1757 } 1758 if (changed) { 1759 error = kernel_lun_remove(oldlun); 1760 if (error != 0) { 1761 log_warnx("failed to remove lun \"%s\", " 1762 "CTL lun %d", 1763 oldlun->l_name, oldlun->l_ctl_lun); 1764 cumulated_error++; 1765 } 1766 lun_delete(oldlun); 1767 continue; 1768 } 1769 1770 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun); 1771 } 1772 1773 TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) { 1774 oldlun = lun_find(oldconf, newlun->l_name); 1775 if (oldlun != NULL) { 1776 if (newlun->l_size != oldlun->l_size || 1777 newlun->l_size == 0) { 1778 log_debugx("resizing lun \"%s\", CTL lun %d", 1779 newlun->l_name, newlun->l_ctl_lun); 1780 error = kernel_lun_resize(newlun); 1781 if (error != 0) { 1782 log_warnx("failed to " 1783 "resize lun \"%s\", CTL lun %d", 1784 newlun->l_name, 1785 newlun->l_ctl_lun); 1786 cumulated_error++; 1787 } 1788 } 1789 continue; 1790 } 1791 log_debugx("adding lun \"%s\"", newlun->l_name); 1792 error = kernel_lun_add(newlun); 1793 if (error != 0) { 1794 log_warnx("failed to add lun \"%s\"", newlun->l_name); 1795 lun_delete(newlun); 1796 cumulated_error++; 1797 } 1798 } 1799 1800 /* 1801 * Now add new targets or modify existing ones. 1802 */ 1803 TAILQ_FOREACH(newtarg, &newconf->conf_targets, t_next) { 1804 oldtarg = target_find(oldconf, newtarg->t_name); 1805 1806 if (oldtarg == NULL) 1807 error = kernel_port_add(newtarg); 1808 else { 1809 target_set_ctl_port(newtarg, oldtarg->t_ctl_port); 1810 error = kernel_port_update(newtarg); 1811 } 1812 if (error != 0) { 1813 log_warnx("failed to %s target %s", 1814 (oldtarg == NULL) ? "add" : "update", 1815 newtarg->t_name); 1816 /* 1817 * XXX: Uncomment after fixing the root cause. 1818 * 1819 * cumulated_error++; 1820 */ 1821 } 1822 } 1823 1824 /* 1825 * Go through the new portals, opening the sockets as neccessary. 1826 */ 1827 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 1828 if (newpg->pg_unassigned) { 1829 log_debugx("not listening on portal-group \"%s\", " 1830 "not assigned to any target", 1831 newpg->pg_name); 1832 continue; 1833 } 1834 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) { 1835 /* 1836 * Try to find already open portal and reuse 1837 * the listening socket. We don't care about 1838 * what portal or portal group that was, what 1839 * matters is the listening address. 1840 */ 1841 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, 1842 pg_next) { 1843 TAILQ_FOREACH(oldp, &oldpg->pg_portals, 1844 p_next) { 1845 if (strcmp(newp->p_listen, 1846 oldp->p_listen) == 0 && 1847 oldp->p_socket > 0) { 1848 newp->p_socket = 1849 oldp->p_socket; 1850 oldp->p_socket = 0; 1851 break; 1852 } 1853 } 1854 } 1855 if (newp->p_socket > 0) { 1856 /* 1857 * We're done with this portal. 1858 */ 1859 continue; 1860 } 1861 1862#ifdef ICL_KERNEL_PROXY 1863 if (proxy_mode) { 1864 newpg->pg_conf->conf_portal_id++; 1865 newp->p_id = newpg->pg_conf->conf_portal_id; 1866 log_debugx("listening on %s, portal-group " 1867 "\"%s\", portal id %d, using ICL proxy", 1868 newp->p_listen, newpg->pg_name, newp->p_id); 1869 kernel_listen(newp->p_ai, newp->p_iser, 1870 newp->p_id); 1871 continue; 1872 } 1873#endif 1874 assert(proxy_mode == false); 1875 assert(newp->p_iser == false); 1876 1877 log_debugx("listening on %s, portal-group \"%s\"", 1878 newp->p_listen, newpg->pg_name); 1879 newp->p_socket = socket(newp->p_ai->ai_family, 1880 newp->p_ai->ai_socktype, 1881 newp->p_ai->ai_protocol); 1882 if (newp->p_socket < 0) { 1883 log_warn("socket(2) failed for %s", 1884 newp->p_listen); 1885 cumulated_error++; 1886 continue; 1887 } 1888 sockbuf = SOCKBUF_SIZE; 1889 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF, 1890 &sockbuf, sizeof(sockbuf)) == -1) 1891 log_warn("setsockopt(SO_RCVBUF) failed " 1892 "for %s", newp->p_listen); 1893 sockbuf = SOCKBUF_SIZE; 1894 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF, 1895 &sockbuf, sizeof(sockbuf)) == -1) 1896 log_warn("setsockopt(SO_SNDBUF) failed " 1897 "for %s", newp->p_listen); 1898 error = setsockopt(newp->p_socket, SOL_SOCKET, 1899 SO_REUSEADDR, &one, sizeof(one)); 1900 if (error != 0) { 1901 log_warn("setsockopt(SO_REUSEADDR) failed " 1902 "for %s", newp->p_listen); 1903 close(newp->p_socket); 1904 newp->p_socket = 0; 1905 cumulated_error++; 1906 continue; 1907 } 1908 error = bind(newp->p_socket, newp->p_ai->ai_addr, 1909 newp->p_ai->ai_addrlen); 1910 if (error != 0) { 1911 log_warn("bind(2) failed for %s", 1912 newp->p_listen); 1913 close(newp->p_socket); 1914 newp->p_socket = 0; 1915 cumulated_error++; 1916 continue; 1917 } 1918 error = listen(newp->p_socket, -1); 1919 if (error != 0) { 1920 log_warn("listen(2) failed for %s", 1921 newp->p_listen); 1922 close(newp->p_socket); 1923 newp->p_socket = 0; 1924 cumulated_error++; 1925 continue; 1926 } 1927 } 1928 } 1929 1930 /* 1931 * Go through the no longer used sockets, closing them. 1932 */ 1933 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) { 1934 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) { 1935 if (oldp->p_socket <= 0) 1936 continue; 1937 log_debugx("closing socket for %s, portal-group \"%s\"", 1938 oldp->p_listen, oldpg->pg_name); 1939 close(oldp->p_socket); 1940 oldp->p_socket = 0; 1941 } 1942 } 1943 1944 /* (Re-)Register on remaining/new iSNS servers. */ 1945 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) { 1946 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) { 1947 if (strcmp(oldns->i_addr, newns->i_addr) == 0) 1948 break; 1949 } 1950 isns_register(newns, oldns); 1951 } 1952 1953 /* Schedule iSNS update */ 1954 if (!TAILQ_EMPTY(&newconf->conf_isns)) 1955 set_timeout((newconf->conf_isns_period + 2) / 3, false); 1956 1957 return (cumulated_error); 1958} 1959 1960bool 1961timed_out(void) 1962{ 1963 1964 return (sigalrm_received); 1965} 1966 1967static void 1968sigalrm_handler_fatal(int dummy __unused) 1969{ 1970 /* 1971 * It would be easiest to just log an error and exit. We can't 1972 * do this, though, because log_errx() is not signal safe, since 1973 * it calls syslog(3). Instead, set a flag checked by pdu_send() 1974 * and pdu_receive(), to call log_errx() there. Should they fail 1975 * to notice, we'll exit here one second later. 1976 */ 1977 if (sigalrm_received) { 1978 /* 1979 * Oh well. Just give up and quit. 1980 */ 1981 _exit(2); 1982 } 1983 1984 sigalrm_received = true; 1985} 1986 1987static void 1988sigalrm_handler(int dummy __unused) 1989{ 1990 1991 sigalrm_received = true; 1992} 1993 1994void 1995set_timeout(int timeout, int fatal) 1996{ 1997 struct sigaction sa; 1998 struct itimerval itv; 1999 int error; 2000 2001 if (timeout <= 0) { 2002 log_debugx("session timeout disabled"); 2003 bzero(&itv, sizeof(itv)); 2004 error = setitimer(ITIMER_REAL, &itv, NULL); 2005 if (error != 0) 2006 log_err(1, "setitimer"); 2007 sigalrm_received = false; 2008 return; 2009 } 2010 2011 sigalrm_received = false; 2012 bzero(&sa, sizeof(sa)); 2013 if (fatal) 2014 sa.sa_handler = sigalrm_handler_fatal; 2015 else 2016 sa.sa_handler = sigalrm_handler; 2017 sigfillset(&sa.sa_mask); 2018 error = sigaction(SIGALRM, &sa, NULL); 2019 if (error != 0) 2020 log_err(1, "sigaction"); 2021 2022 /* 2023 * First SIGALRM will arive after conf_timeout seconds. 2024 * If we do nothing, another one will arrive a second later. 2025 */ 2026 log_debugx("setting session timeout to %d seconds", timeout); 2027 bzero(&itv, sizeof(itv)); 2028 itv.it_interval.tv_sec = 1; 2029 itv.it_value.tv_sec = timeout; 2030 error = setitimer(ITIMER_REAL, &itv, NULL); 2031 if (error != 0) 2032 log_err(1, "setitimer"); 2033} 2034 2035static int 2036wait_for_children(bool block) 2037{ 2038 pid_t pid; 2039 int status; 2040 int num = 0; 2041 2042 for (;;) { 2043 /* 2044 * If "block" is true, wait for at least one process. 2045 */ 2046 if (block && num == 0) 2047 pid = wait4(-1, &status, 0, NULL); 2048 else 2049 pid = wait4(-1, &status, WNOHANG, NULL); 2050 if (pid <= 0) 2051 break; 2052 if (WIFSIGNALED(status)) { 2053 log_warnx("child process %d terminated with signal %d", 2054 pid, WTERMSIG(status)); 2055 } else if (WEXITSTATUS(status) != 0) { 2056 log_warnx("child process %d terminated with exit status %d", 2057 pid, WEXITSTATUS(status)); 2058 } else { 2059 log_debugx("child process %d terminated gracefully", pid); 2060 } 2061 num++; 2062 } 2063 2064 return (num); 2065} 2066 2067static void 2068handle_connection(struct portal *portal, int fd, 2069 const struct sockaddr *client_sa, bool dont_fork) 2070{ 2071 struct connection *conn; 2072 int error; 2073 pid_t pid; 2074 char host[NI_MAXHOST + 1]; 2075 struct conf *conf; 2076 2077 conf = portal->p_portal_group->pg_conf; 2078 2079 if (dont_fork) { 2080 log_debugx("incoming connection; not forking due to -d flag"); 2081 } else { 2082 nchildren -= wait_for_children(false); 2083 assert(nchildren >= 0); 2084 2085 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) { 2086 log_debugx("maxproc limit of %d child processes hit; " 2087 "waiting for child process to exit", conf->conf_maxproc); 2088 nchildren -= wait_for_children(true); 2089 assert(nchildren >= 0); 2090 } 2091 log_debugx("incoming connection; forking child process #%d", 2092 nchildren); 2093 nchildren++; 2094 pid = fork(); 2095 if (pid < 0) 2096 log_err(1, "fork"); 2097 if (pid > 0) { 2098 close(fd); 2099 return; 2100 } 2101 } 2102 pidfile_close(conf->conf_pidfh); 2103 2104 error = getnameinfo(client_sa, client_sa->sa_len, 2105 host, sizeof(host), NULL, 0, NI_NUMERICHOST); 2106 if (error != 0) 2107 log_errx(1, "getnameinfo: %s", gai_strerror(error)); 2108 2109 log_debugx("accepted connection from %s; portal group \"%s\"", 2110 host, portal->p_portal_group->pg_name); 2111 log_set_peer_addr(host); 2112 setproctitle("%s", host); 2113 2114 conn = connection_new(portal, fd, host, client_sa); 2115 set_timeout(conf->conf_timeout, true); 2116 kernel_capsicate(); 2117 login(conn); 2118 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) { 2119 kernel_handoff(conn); 2120 log_debugx("connection handed off to the kernel"); 2121 } else { 2122 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY); 2123 discovery(conn); 2124 } 2125 log_debugx("nothing more to do; exiting"); 2126 exit(0); 2127} 2128 2129static int 2130fd_add(int fd, fd_set *fdset, int nfds) 2131{ 2132 2133 /* 2134 * Skip sockets which we failed to bind. 2135 */ 2136 if (fd <= 0) 2137 return (nfds); 2138 2139 FD_SET(fd, fdset); 2140 if (fd > nfds) 2141 nfds = fd; 2142 return (nfds); 2143} 2144 2145static void 2146main_loop(struct conf *conf, bool dont_fork) 2147{ 2148 struct portal_group *pg; 2149 struct portal *portal; 2150 struct sockaddr_storage client_sa; 2151 socklen_t client_salen; 2152#ifdef ICL_KERNEL_PROXY 2153 int connection_id; 2154 int portal_id; 2155#endif 2156 fd_set fdset; 2157 int error, nfds, client_fd; 2158 2159 pidfile_write(conf->conf_pidfh); 2160 2161 for (;;) { 2162 if (sighup_received || sigterm_received || timed_out()) 2163 return; 2164 2165#ifdef ICL_KERNEL_PROXY 2166 if (proxy_mode) { 2167 client_salen = sizeof(client_sa); 2168 kernel_accept(&connection_id, &portal_id, 2169 (struct sockaddr *)&client_sa, &client_salen); 2170 assert(client_salen >= client_sa.ss_len); 2171 2172 log_debugx("incoming connection, id %d, portal id %d", 2173 connection_id, portal_id); 2174 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2175 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 2176 if (portal->p_id == portal_id) { 2177 goto found; 2178 } 2179 } 2180 } 2181 2182 log_errx(1, "kernel returned invalid portal_id %d", 2183 portal_id); 2184 2185found: 2186 handle_connection(portal, connection_id, 2187 (struct sockaddr *)&client_sa, dont_fork); 2188 } else { 2189#endif 2190 assert(proxy_mode == false); 2191 2192 FD_ZERO(&fdset); 2193 nfds = 0; 2194 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2195 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 2196 nfds = fd_add(portal->p_socket, &fdset, nfds); 2197 } 2198 error = select(nfds + 1, &fdset, NULL, NULL, NULL); 2199 if (error <= 0) { 2200 if (errno == EINTR) 2201 return; 2202 log_err(1, "select"); 2203 } 2204 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2205 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 2206 if (!FD_ISSET(portal->p_socket, &fdset)) 2207 continue; 2208 client_salen = sizeof(client_sa); 2209 client_fd = accept(portal->p_socket, 2210 (struct sockaddr *)&client_sa, 2211 &client_salen); 2212 if (client_fd < 0) 2213 log_err(1, "accept"); 2214 assert(client_salen >= client_sa.ss_len); 2215 2216 handle_connection(portal, client_fd, 2217 (struct sockaddr *)&client_sa, 2218 dont_fork); 2219 break; 2220 } 2221 } 2222#ifdef ICL_KERNEL_PROXY 2223 } 2224#endif 2225 } 2226} 2227 2228static void 2229sighup_handler(int dummy __unused) 2230{ 2231 2232 sighup_received = true; 2233} 2234 2235static void 2236sigterm_handler(int dummy __unused) 2237{ 2238 2239 sigterm_received = true; 2240} 2241 2242static void 2243sigchld_handler(int dummy __unused) 2244{ 2245 2246 /* 2247 * The only purpose of this handler is to make SIGCHLD 2248 * interrupt the ISCSIDWAIT ioctl(2), so we can call 2249 * wait_for_children(). 2250 */ 2251} 2252 2253static void 2254register_signals(void) 2255{ 2256 struct sigaction sa; 2257 int error; 2258 2259 bzero(&sa, sizeof(sa)); 2260 sa.sa_handler = sighup_handler; 2261 sigfillset(&sa.sa_mask); 2262 error = sigaction(SIGHUP, &sa, NULL); 2263 if (error != 0) 2264 log_err(1, "sigaction"); 2265 2266 sa.sa_handler = sigterm_handler; 2267 error = sigaction(SIGTERM, &sa, NULL); 2268 if (error != 0) 2269 log_err(1, "sigaction"); 2270 2271 sa.sa_handler = sigterm_handler; 2272 error = sigaction(SIGINT, &sa, NULL); 2273 if (error != 0) 2274 log_err(1, "sigaction"); 2275 2276 sa.sa_handler = sigchld_handler; 2277 error = sigaction(SIGCHLD, &sa, NULL); 2278 if (error != 0) 2279 log_err(1, "sigaction"); 2280} 2281 2282int 2283main(int argc, char **argv) 2284{ 2285 struct conf *oldconf, *newconf, *tmpconf; 2286 struct isns *newns; 2287 const char *config_path = DEFAULT_CONFIG_PATH; 2288 int debug = 0, ch, error; 2289 bool dont_daemonize = false; 2290 2291 while ((ch = getopt(argc, argv, "df:R")) != -1) { 2292 switch (ch) { 2293 case 'd': 2294 dont_daemonize = true; 2295 debug++; 2296 break; 2297 case 'f': 2298 config_path = optarg; 2299 break; 2300 case 'R': 2301#ifndef ICL_KERNEL_PROXY 2302 log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY " 2303 "does not support iSER protocol"); 2304#endif 2305 proxy_mode = true; 2306 break; 2307 case '?': 2308 default: 2309 usage(); 2310 } 2311 } 2312 argc -= optind; 2313 if (argc != 0) 2314 usage(); 2315 2316 log_init(debug); 2317 kernel_init(); 2318 2319 oldconf = conf_new_from_kernel(); 2320 newconf = conf_new_from_file(config_path); 2321 if (newconf == NULL) 2322 log_errx(1, "configuration error; exiting"); 2323 if (debug > 0) { 2324 oldconf->conf_debug = debug; 2325 newconf->conf_debug = debug; 2326 } 2327 2328 error = conf_apply(oldconf, newconf); 2329 if (error != 0) 2330 log_errx(1, "failed to apply configuration; exiting"); 2331 2332 conf_delete(oldconf); 2333 oldconf = NULL; 2334 2335 register_signals(); 2336 2337 if (dont_daemonize == false) { 2338 log_debugx("daemonizing"); 2339 if (daemon(0, 0) == -1) { 2340 log_warn("cannot daemonize"); 2341 pidfile_remove(newconf->conf_pidfh); 2342 exit(1); 2343 } 2344 } 2345 2346 /* Schedule iSNS update */ 2347 if (!TAILQ_EMPTY(&newconf->conf_isns)) 2348 set_timeout((newconf->conf_isns_period + 2) / 3, false); 2349 2350 for (;;) { 2351 main_loop(newconf, dont_daemonize); 2352 if (sighup_received) { 2353 sighup_received = false; 2354 log_debugx("received SIGHUP, reloading configuration"); 2355 tmpconf = conf_new_from_file(config_path); 2356 if (tmpconf == NULL) { 2357 log_warnx("configuration error, " 2358 "continuing with old configuration"); 2359 } else { 2360 if (debug > 0) 2361 tmpconf->conf_debug = debug; 2362 oldconf = newconf; 2363 newconf = tmpconf; 2364 error = conf_apply(oldconf, newconf); 2365 if (error != 0) 2366 log_warnx("failed to reload " 2367 "configuration"); 2368 conf_delete(oldconf); 2369 oldconf = NULL; 2370 } 2371 } else if (sigterm_received) { 2372 log_debugx("exiting on signal; " 2373 "reloading empty configuration"); 2374 2375 log_debugx("disabling CTL iSCSI port " 2376 "and terminating all connections"); 2377 2378 oldconf = newconf; 2379 newconf = conf_new(); 2380 if (debug > 0) 2381 newconf->conf_debug = debug; 2382 error = conf_apply(oldconf, newconf); 2383 if (error != 0) 2384 log_warnx("failed to apply configuration"); 2385 conf_delete(oldconf); 2386 oldconf = NULL; 2387 2388 log_warnx("exiting on signal"); 2389 exit(0); 2390 } else { 2391 nchildren -= wait_for_children(false); 2392 assert(nchildren >= 0); 2393 if (timed_out()) { 2394 set_timeout(0, false); 2395 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) 2396 isns_check(newns); 2397 /* Schedule iSNS update */ 2398 if (!TAILQ_EMPTY(&newconf->conf_isns)) { 2399 set_timeout((newconf->conf_isns_period 2400 + 2) / 3, 2401 false); 2402 } 2403 } 2404 } 2405 } 2406 /* NOTREACHED */ 2407} 2408