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("$FreeBSD$"); 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 55 bool proxy_mode = false; 56 57 static volatile bool sighup_received = false; 58 static volatile bool sigterm_received = false; 59 static volatile bool sigalrm_received = false; 60 61 static int nchildren = 0; 62 static uint16_t last_portal_group_tag = 0; 63 64 static void 65 usage(void) 66 { 67 68 fprintf(stderr, "usage: ctld [-d][-f config-file]\n"); 69 exit(1); 70 } 71 72 char * 73 checked_strdup(const char *s) 74 { 75 char *c; 76 77 c = strdup(s); 78 if (c == NULL) 79 log_err(1, "strdup"); 80 return (c); 81 } 82 83 struct conf * 84 conf_new(void) 85 { 86 struct conf *conf; 87 88 conf = calloc(1, sizeof(*conf)); 89 if (conf == NULL) 90 log_err(1, "calloc"); 91 TAILQ_INIT(&conf->conf_luns); 92 TAILQ_INIT(&conf->conf_targets); 93 TAILQ_INIT(&conf->conf_auth_groups); 94 TAILQ_INIT(&conf->conf_ports); 95 TAILQ_INIT(&conf->conf_portal_groups); 96 TAILQ_INIT(&conf->conf_pports); 97 TAILQ_INIT(&conf->conf_isns); 98 99 conf->conf_isns_period = 900; 100 conf->conf_isns_timeout = 5; 101 conf->conf_debug = 0; 102 conf->conf_timeout = 60; 103 conf->conf_maxproc = 30; 104 105 return (conf); 106 } 107 108 void 109 conf_delete(struct conf *conf) 110 { 111 struct lun *lun, *ltmp; 112 struct target *targ, *tmp; 113 struct auth_group *ag, *cagtmp; 114 struct portal_group *pg, *cpgtmp; 115 struct pport *pp, *pptmp; 116 struct isns *is, *istmp; 117 118 assert(conf->conf_pidfh == NULL); 119 120 TAILQ_FOREACH_SAFE(lun, &conf->conf_luns, l_next, ltmp) 121 lun_delete(lun); 122 TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp) 123 target_delete(targ); 124 TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp) 125 auth_group_delete(ag); 126 TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp) 127 portal_group_delete(pg); 128 TAILQ_FOREACH_SAFE(pp, &conf->conf_pports, pp_next, pptmp) 129 pport_delete(pp); 130 TAILQ_FOREACH_SAFE(is, &conf->conf_isns, i_next, istmp) 131 isns_delete(is); 132 assert(TAILQ_EMPTY(&conf->conf_ports)); 133 free(conf->conf_pidfile_path); 134 free(conf); 135 } 136 137 static struct auth * 138 auth_new(struct auth_group *ag) 139 { 140 struct auth *auth; 141 142 auth = calloc(1, sizeof(*auth)); 143 if (auth == NULL) 144 log_err(1, "calloc"); 145 auth->a_auth_group = ag; 146 TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next); 147 return (auth); 148 } 149 150 static void 151 auth_delete(struct auth *auth) 152 { 153 TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next); 154 155 free(auth->a_user); 156 free(auth->a_secret); 157 free(auth->a_mutual_user); 158 free(auth->a_mutual_secret); 159 free(auth); 160 } 161 162 const struct auth * 163 auth_find(const struct auth_group *ag, const char *user) 164 { 165 const struct auth *auth; 166 167 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) { 168 if (strcmp(auth->a_user, user) == 0) 169 return (auth); 170 } 171 172 return (NULL); 173 } 174 175 static void 176 auth_check_secret_length(struct auth *auth) 177 { 178 size_t len; 179 180 len = strlen(auth->a_secret); 181 if (len > 16) { 182 if (auth->a_auth_group->ag_name != NULL) 183 log_warnx("secret for user \"%s\", auth-group \"%s\", " 184 "is too long; it should be at most 16 characters " 185 "long", auth->a_user, auth->a_auth_group->ag_name); 186 else 187 log_warnx("secret for user \"%s\", target \"%s\", " 188 "is too long; it should be at most 16 characters " 189 "long", auth->a_user, 190 auth->a_auth_group->ag_target->t_name); 191 } 192 if (len < 12) { 193 if (auth->a_auth_group->ag_name != NULL) 194 log_warnx("secret for user \"%s\", auth-group \"%s\", " 195 "is too short; it should be at least 12 characters " 196 "long", auth->a_user, 197 auth->a_auth_group->ag_name); 198 else 199 log_warnx("secret for user \"%s\", target \"%s\", " 200 "is too short; it should be at least 16 characters " 201 "long", auth->a_user, 202 auth->a_auth_group->ag_target->t_name); 203 } 204 205 if (auth->a_mutual_secret != NULL) { 206 len = strlen(auth->a_mutual_secret); 207 if (len > 16) { 208 if (auth->a_auth_group->ag_name != NULL) 209 log_warnx("mutual secret for user \"%s\", " 210 "auth-group \"%s\", is too long; it should " 211 "be at most 16 characters long", 212 auth->a_user, auth->a_auth_group->ag_name); 213 else 214 log_warnx("mutual secret for user \"%s\", " 215 "target \"%s\", is too long; it should " 216 "be at most 16 characters long", 217 auth->a_user, 218 auth->a_auth_group->ag_target->t_name); 219 } 220 if (len < 12) { 221 if (auth->a_auth_group->ag_name != NULL) 222 log_warnx("mutual secret for user \"%s\", " 223 "auth-group \"%s\", is too short; it " 224 "should be at least 12 characters long", 225 auth->a_user, auth->a_auth_group->ag_name); 226 else 227 log_warnx("mutual secret for user \"%s\", " 228 "target \"%s\", is too short; it should be " 229 "at least 16 characters long", 230 auth->a_user, 231 auth->a_auth_group->ag_target->t_name); 232 } 233 } 234 } 235 236 const struct auth * 237 auth_new_chap(struct auth_group *ag, const char *user, 238 const char *secret) 239 { 240 struct auth *auth; 241 242 if (ag->ag_type == AG_TYPE_UNKNOWN) 243 ag->ag_type = AG_TYPE_CHAP; 244 if (ag->ag_type != AG_TYPE_CHAP) { 245 if (ag->ag_name != NULL) 246 log_warnx("cannot mix \"chap\" authentication with " 247 "other types for auth-group \"%s\"", ag->ag_name); 248 else 249 log_warnx("cannot mix \"chap\" authentication with " 250 "other types for target \"%s\"", 251 ag->ag_target->t_name); 252 return (NULL); 253 } 254 255 auth = auth_new(ag); 256 auth->a_user = checked_strdup(user); 257 auth->a_secret = checked_strdup(secret); 258 259 auth_check_secret_length(auth); 260 261 return (auth); 262 } 263 264 const struct auth * 265 auth_new_chap_mutual(struct auth_group *ag, const char *user, 266 const char *secret, const char *user2, const char *secret2) 267 { 268 struct auth *auth; 269 270 if (ag->ag_type == AG_TYPE_UNKNOWN) 271 ag->ag_type = AG_TYPE_CHAP_MUTUAL; 272 if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) { 273 if (ag->ag_name != NULL) 274 log_warnx("cannot mix \"chap-mutual\" authentication " 275 "with other types for auth-group \"%s\"", 276 ag->ag_name); 277 else 278 log_warnx("cannot mix \"chap-mutual\" authentication " 279 "with other types for target \"%s\"", 280 ag->ag_target->t_name); 281 return (NULL); 282 } 283 284 auth = auth_new(ag); 285 auth->a_user = checked_strdup(user); 286 auth->a_secret = checked_strdup(secret); 287 auth->a_mutual_user = checked_strdup(user2); 288 auth->a_mutual_secret = checked_strdup(secret2); 289 290 auth_check_secret_length(auth); 291 292 return (auth); 293 } 294 295 const struct auth_name * 296 auth_name_new(struct auth_group *ag, const char *name) 297 { 298 struct auth_name *an; 299 300 an = calloc(1, sizeof(*an)); 301 if (an == NULL) 302 log_err(1, "calloc"); 303 an->an_auth_group = ag; 304 an->an_initator_name = checked_strdup(name); 305 TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next); 306 return (an); 307 } 308 309 static void 310 auth_name_delete(struct auth_name *an) 311 { 312 TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next); 313 314 free(an->an_initator_name); 315 free(an); 316 } 317 318 bool 319 auth_name_defined(const struct auth_group *ag) 320 { 321 if (TAILQ_EMPTY(&ag->ag_names)) 322 return (false); 323 return (true); 324 } 325 326 const struct auth_name * 327 auth_name_find(const struct auth_group *ag, const char *name) 328 { 329 const struct auth_name *auth_name; 330 331 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) { 332 if (strcmp(auth_name->an_initator_name, name) == 0) 333 return (auth_name); 334 } 335 336 return (NULL); 337 } 338 339 int 340 auth_name_check(const struct auth_group *ag, const char *initiator_name) 341 { 342 if (!auth_name_defined(ag)) 343 return (0); 344 345 if (auth_name_find(ag, initiator_name) == NULL) 346 return (1); 347 348 return (0); 349 } 350 351 const struct auth_portal * 352 auth_portal_new(struct auth_group *ag, const char *portal) 353 { 354 struct auth_portal *ap; 355 char *net, *mask, *str, *tmp; 356 int len, dm, m; 357 358 ap = calloc(1, sizeof(*ap)); 359 if (ap == NULL) 360 log_err(1, "calloc"); 361 ap->ap_auth_group = ag; 362 ap->ap_initator_portal = checked_strdup(portal); 363 mask = str = checked_strdup(portal); 364 net = strsep(&mask, "/"); 365 if (net[0] == '[') 366 net++; 367 len = strlen(net); 368 if (len == 0) 369 goto error; 370 if (net[len - 1] == ']') 371 net[len - 1] = 0; 372 if (strchr(net, ':') != NULL) { 373 struct sockaddr_in6 *sin6 = 374 (struct sockaddr_in6 *)&ap->ap_sa; 375 376 sin6->sin6_len = sizeof(*sin6); 377 sin6->sin6_family = AF_INET6; 378 if (inet_pton(AF_INET6, net, &sin6->sin6_addr) <= 0) 379 goto error; 380 dm = 128; 381 } else { 382 struct sockaddr_in *sin = 383 (struct sockaddr_in *)&ap->ap_sa; 384 385 sin->sin_len = sizeof(*sin); 386 sin->sin_family = AF_INET; 387 if (inet_pton(AF_INET, net, &sin->sin_addr) <= 0) 388 goto error; 389 dm = 32; 390 } 391 if (mask != NULL) { 392 m = strtol(mask, &tmp, 0); 393 if (m < 0 || m > dm || tmp[0] != 0) 394 goto error; 395 } else 396 m = dm; 397 ap->ap_mask = m; 398 free(str); 399 TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next); 400 return (ap); 401 402 error: 403 free(ap); 404 log_errx(1, "Incorrect initiator portal '%s'", portal); 405 return (NULL); 406 } 407 408 static void 409 auth_portal_delete(struct auth_portal *ap) 410 { 411 TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next); 412 413 free(ap->ap_initator_portal); 414 free(ap); 415 } 416 417 bool 418 auth_portal_defined(const struct auth_group *ag) 419 { 420 if (TAILQ_EMPTY(&ag->ag_portals)) 421 return (false); 422 return (true); 423 } 424 425 const struct auth_portal * 426 auth_portal_find(const struct auth_group *ag, const struct sockaddr_storage *ss) 427 { 428 const struct auth_portal *ap; 429 const uint8_t *a, *b; 430 int i; 431 uint8_t bmask; 432 433 TAILQ_FOREACH(ap, &ag->ag_portals, ap_next) { 434 if (ap->ap_sa.ss_family != ss->ss_family) 435 continue; 436 if (ss->ss_family == AF_INET) { 437 a = (const uint8_t *) 438 &((const struct sockaddr_in *)ss)->sin_addr; 439 b = (const uint8_t *) 440 &((const struct sockaddr_in *)&ap->ap_sa)->sin_addr; 441 } else { 442 a = (const uint8_t *) 443 &((const struct sockaddr_in6 *)ss)->sin6_addr; 444 b = (const uint8_t *) 445 &((const struct sockaddr_in6 *)&ap->ap_sa)->sin6_addr; 446 } 447 for (i = 0; i < ap->ap_mask / 8; i++) { 448 if (a[i] != b[i]) 449 goto next; 450 } 451 if (ap->ap_mask % 8) { 452 bmask = 0xff << (8 - (ap->ap_mask % 8)); 453 if ((a[i] & bmask) != (b[i] & bmask)) 454 goto next; 455 } 456 return (ap); 457 next: 458 ; 459 } 460 461 return (NULL); 462 } 463 464 int 465 auth_portal_check(const struct auth_group *ag, const struct sockaddr_storage *sa) 466 { 467 468 if (!auth_portal_defined(ag)) 469 return (0); 470 471 if (auth_portal_find(ag, sa) == NULL) 472 return (1); 473 474 return (0); 475 } 476 477 struct auth_group * 478 auth_group_new(struct conf *conf, const char *name) 479 { 480 struct auth_group *ag; 481 482 if (name != NULL) { 483 ag = auth_group_find(conf, name); 484 if (ag != NULL) { 485 log_warnx("duplicated auth-group \"%s\"", name); 486 return (NULL); 487 } 488 } 489 490 ag = calloc(1, sizeof(*ag)); 491 if (ag == NULL) 492 log_err(1, "calloc"); 493 if (name != NULL) 494 ag->ag_name = checked_strdup(name); 495 TAILQ_INIT(&ag->ag_auths); 496 TAILQ_INIT(&ag->ag_names); 497 TAILQ_INIT(&ag->ag_portals); 498 ag->ag_conf = conf; 499 TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next); 500 501 return (ag); 502 } 503 504 void 505 auth_group_delete(struct auth_group *ag) 506 { 507 struct auth *auth, *auth_tmp; 508 struct auth_name *auth_name, *auth_name_tmp; 509 struct auth_portal *auth_portal, *auth_portal_tmp; 510 511 TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next); 512 513 TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp) 514 auth_delete(auth); 515 TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp) 516 auth_name_delete(auth_name); 517 TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next, 518 auth_portal_tmp) 519 auth_portal_delete(auth_portal); 520 free(ag->ag_name); 521 free(ag); 522 } 523 524 struct auth_group * 525 auth_group_find(const struct conf *conf, const char *name) 526 { 527 struct auth_group *ag; 528 529 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 530 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0) 531 return (ag); 532 } 533 534 return (NULL); 535 } 536 537 int 538 auth_group_set_type(struct auth_group *ag, const char *str) 539 { 540 int type; 541 542 if (strcmp(str, "none") == 0) { 543 type = AG_TYPE_NO_AUTHENTICATION; 544 } else if (strcmp(str, "deny") == 0) { 545 type = AG_TYPE_DENY; 546 } else if (strcmp(str, "chap") == 0) { 547 type = AG_TYPE_CHAP; 548 } else if (strcmp(str, "chap-mutual") == 0) { 549 type = AG_TYPE_CHAP_MUTUAL; 550 } else { 551 if (ag->ag_name != NULL) 552 log_warnx("invalid auth-type \"%s\" for auth-group " 553 "\"%s\"", str, ag->ag_name); 554 else 555 log_warnx("invalid auth-type \"%s\" for target " 556 "\"%s\"", str, ag->ag_target->t_name); 557 return (1); 558 } 559 560 if (ag->ag_type != AG_TYPE_UNKNOWN && ag->ag_type != type) { 561 if (ag->ag_name != NULL) { 562 log_warnx("cannot set auth-type to \"%s\" for " 563 "auth-group \"%s\"; already has a different " 564 "type", str, ag->ag_name); 565 } else { 566 log_warnx("cannot set auth-type to \"%s\" for target " 567 "\"%s\"; already has a different type", 568 str, ag->ag_target->t_name); 569 } 570 return (1); 571 } 572 573 ag->ag_type = type; 574 575 return (0); 576 } 577 578 static struct portal * 579 portal_new(struct portal_group *pg) 580 { 581 struct portal *portal; 582 583 portal = calloc(1, sizeof(*portal)); 584 if (portal == NULL) 585 log_err(1, "calloc"); 586 TAILQ_INIT(&portal->p_targets); 587 portal->p_portal_group = pg; 588 TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next); 589 return (portal); 590 } 591 592 static void 593 portal_delete(struct portal *portal) 594 { 595 596 TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next); 597 if (portal->p_ai != NULL) 598 freeaddrinfo(portal->p_ai); 599 free(portal->p_listen); 600 free(portal); 601 } 602 603 struct portal_group * 604 portal_group_new(struct conf *conf, const char *name) 605 { 606 struct portal_group *pg; 607 608 pg = portal_group_find(conf, name); 609 if (pg != NULL) { 610 log_warnx("duplicated portal-group \"%s\"", name); 611 return (NULL); 612 } 613 614 pg = calloc(1, sizeof(*pg)); 615 if (pg == NULL) 616 log_err(1, "calloc"); 617 pg->pg_name = checked_strdup(name); 618 TAILQ_INIT(&pg->pg_portals); 619 TAILQ_INIT(&pg->pg_ports); 620 pg->pg_conf = conf; 621 pg->pg_tag = 0; /* Assigned later in conf_apply(). */ 622 TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next); 623 624 return (pg); 625 } 626 627 void 628 portal_group_delete(struct portal_group *pg) 629 { 630 struct portal *portal, *tmp; 631 struct port *port, *tport; 632 633 TAILQ_FOREACH_SAFE(port, &pg->pg_ports, p_pgs, tport) 634 port_delete(port); 635 TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next); 636 637 TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp) 638 portal_delete(portal); 639 free(pg->pg_name); 640 free(pg->pg_offload); 641 free(pg->pg_redirection); 642 free(pg); 643 } 644 645 struct portal_group * 646 portal_group_find(const struct conf *conf, const char *name) 647 { 648 struct portal_group *pg; 649 650 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 651 if (strcmp(pg->pg_name, name) == 0) 652 return (pg); 653 } 654 655 return (NULL); 656 } 657 658 static int 659 parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai) 660 { 661 struct addrinfo hints; 662 char *str, *addr, *ch; 663 const char *port; 664 int error, colons = 0; 665 666 str = arg = strdup(arg); 667 if (arg[0] == '[') { 668 /* 669 * IPv6 address in square brackets, perhaps with port. 670 */ 671 arg++; 672 addr = strsep(&arg, "]"); 673 if (arg == NULL) 674 return (1); 675 if (arg[0] == '\0') { 676 port = def_port; 677 } else if (arg[0] == ':') { 678 port = arg + 1; 679 } else { 680 free(str); 681 return (1); 682 } 683 } else { 684 /* 685 * Either IPv6 address without brackets - and without 686 * a port - or IPv4 address. Just count the colons. 687 */ 688 for (ch = arg; *ch != '\0'; ch++) { 689 if (*ch == ':') 690 colons++; 691 } 692 if (colons > 1) { 693 addr = arg; 694 port = def_port; 695 } else { 696 addr = strsep(&arg, ":"); 697 if (arg == NULL) 698 port = def_port; 699 else 700 port = arg; 701 } 702 } 703 704 memset(&hints, 0, sizeof(hints)); 705 hints.ai_family = PF_UNSPEC; 706 hints.ai_socktype = SOCK_STREAM; 707 hints.ai_flags = AI_PASSIVE; 708 error = getaddrinfo(addr, port, &hints, ai); 709 free(str); 710 return ((error != 0) ? 1 : 0); 711 } 712 713 int 714 portal_group_add_listen(struct portal_group *pg, const char *value, bool iser) 715 { 716 struct portal *portal; 717 718 portal = portal_new(pg); 719 portal->p_listen = checked_strdup(value); 720 portal->p_iser = iser; 721 722 if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) { 723 log_warnx("invalid listen address %s", portal->p_listen); 724 portal_delete(portal); 725 return (1); 726 } 727 728 /* 729 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 730 * those into multiple portals. 731 */ 732 733 return (0); 734 } 735 736 int 737 isns_new(struct conf *conf, const char *addr) 738 { 739 struct isns *isns; 740 741 isns = calloc(1, sizeof(*isns)); 742 if (isns == NULL) 743 log_err(1, "calloc"); 744 isns->i_conf = conf; 745 TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next); 746 isns->i_addr = checked_strdup(addr); 747 748 if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) { 749 log_warnx("invalid iSNS address %s", isns->i_addr); 750 isns_delete(isns); 751 return (1); 752 } 753 754 /* 755 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 756 * those into multiple servers. 757 */ 758 759 return (0); 760 } 761 762 void 763 isns_delete(struct isns *isns) 764 { 765 766 TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next); 767 free(isns->i_addr); 768 if (isns->i_ai != NULL) 769 freeaddrinfo(isns->i_ai); 770 free(isns); 771 } 772 773 static int 774 isns_do_connect(struct isns *isns) 775 { 776 int s; 777 778 s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype, 779 isns->i_ai->ai_protocol); 780 if (s < 0) { 781 log_warn("socket(2) failed for %s", isns->i_addr); 782 return (-1); 783 } 784 if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) { 785 log_warn("connect(2) failed for %s", isns->i_addr); 786 close(s); 787 return (-1); 788 } 789 return(s); 790 } 791 792 static int 793 isns_do_register(struct isns *isns, int s, const char *hostname) 794 { 795 struct conf *conf = isns->i_conf; 796 struct target *target; 797 struct portal *portal; 798 struct portal_group *pg; 799 struct port *port; 800 struct isns_req *req; 801 int res = 0; 802 uint32_t error; 803 804 req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT); 805 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 806 isns_req_add_delim(req); 807 isns_req_add_str(req, 1, hostname); 808 isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */ 809 isns_req_add_32(req, 6, conf->conf_isns_period); 810 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 811 if (pg->pg_unassigned) 812 continue; 813 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 814 isns_req_add_addr(req, 16, portal->p_ai); 815 isns_req_add_port(req, 17, portal->p_ai); 816 } 817 } 818 TAILQ_FOREACH(target, &conf->conf_targets, t_next) { 819 isns_req_add_str(req, 32, target->t_name); 820 isns_req_add_32(req, 33, 1); /* 1 -- Target*/ 821 if (target->t_alias != NULL) 822 isns_req_add_str(req, 34, target->t_alias); 823 TAILQ_FOREACH(port, &target->t_ports, p_ts) { 824 if ((pg = port->p_portal_group) == NULL) 825 continue; 826 isns_req_add_32(req, 51, pg->pg_tag); 827 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 828 isns_req_add_addr(req, 49, portal->p_ai); 829 isns_req_add_port(req, 50, portal->p_ai); 830 } 831 } 832 } 833 res = isns_req_send(s, req); 834 if (res < 0) { 835 log_warn("send(2) failed for %s", isns->i_addr); 836 goto quit; 837 } 838 res = isns_req_receive(s, req); 839 if (res < 0) { 840 log_warn("receive(2) failed for %s", isns->i_addr); 841 goto quit; 842 } 843 error = isns_req_get_status(req); 844 if (error != 0) { 845 log_warnx("iSNS register error %d for %s", error, isns->i_addr); 846 res = -1; 847 } 848 quit: 849 isns_req_free(req); 850 return (res); 851 } 852 853 static int 854 isns_do_check(struct isns *isns, int s, const char *hostname) 855 { 856 struct conf *conf = isns->i_conf; 857 struct isns_req *req; 858 int res = 0; 859 uint32_t error; 860 861 req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT); 862 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 863 isns_req_add_str(req, 1, hostname); 864 isns_req_add_delim(req); 865 isns_req_add(req, 2, 0, NULL); 866 res = isns_req_send(s, req); 867 if (res < 0) { 868 log_warn("send(2) failed for %s", isns->i_addr); 869 goto quit; 870 } 871 res = isns_req_receive(s, req); 872 if (res < 0) { 873 log_warn("receive(2) failed for %s", isns->i_addr); 874 goto quit; 875 } 876 error = isns_req_get_status(req); 877 if (error != 0) { 878 log_warnx("iSNS check error %d for %s", error, isns->i_addr); 879 res = -1; 880 } 881 quit: 882 isns_req_free(req); 883 return (res); 884 } 885 886 static int 887 isns_do_deregister(struct isns *isns, int s, const char *hostname) 888 { 889 struct conf *conf = isns->i_conf; 890 struct isns_req *req; 891 int res = 0; 892 uint32_t error; 893 894 req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT); 895 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 896 isns_req_add_delim(req); 897 isns_req_add_str(req, 1, hostname); 898 res = isns_req_send(s, req); 899 if (res < 0) { 900 log_warn("send(2) failed for %s", isns->i_addr); 901 goto quit; 902 } 903 res = isns_req_receive(s, req); 904 if (res < 0) { 905 log_warn("receive(2) failed for %s", isns->i_addr); 906 goto quit; 907 } 908 error = isns_req_get_status(req); 909 if (error != 0) { 910 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr); 911 res = -1; 912 } 913 quit: 914 isns_req_free(req); 915 return (res); 916 } 917 918 void 919 isns_register(struct isns *isns, struct isns *oldisns) 920 { 921 struct conf *conf = isns->i_conf; 922 int s; 923 char hostname[256]; 924 925 if (TAILQ_EMPTY(&conf->conf_targets) || 926 TAILQ_EMPTY(&conf->conf_portal_groups)) 927 return; 928 set_timeout(conf->conf_isns_timeout, false); 929 s = isns_do_connect(isns); 930 if (s < 0) { 931 set_timeout(0, false); 932 return; 933 } 934 gethostname(hostname, sizeof(hostname)); 935 936 if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets)) 937 oldisns = isns; 938 isns_do_deregister(oldisns, s, hostname); 939 isns_do_register(isns, s, hostname); 940 close(s); 941 set_timeout(0, false); 942 } 943 944 void 945 isns_check(struct isns *isns) 946 { 947 struct conf *conf = isns->i_conf; 948 int s, res; 949 char hostname[256]; 950 951 if (TAILQ_EMPTY(&conf->conf_targets) || 952 TAILQ_EMPTY(&conf->conf_portal_groups)) 953 return; 954 set_timeout(conf->conf_isns_timeout, false); 955 s = isns_do_connect(isns); 956 if (s < 0) { 957 set_timeout(0, false); 958 return; 959 } 960 gethostname(hostname, sizeof(hostname)); 961 962 res = isns_do_check(isns, s, hostname); 963 if (res < 0) { 964 isns_do_deregister(isns, s, hostname); 965 isns_do_register(isns, s, hostname); 966 } 967 close(s); 968 set_timeout(0, false); 969 } 970 971 void 972 isns_deregister(struct isns *isns) 973 { 974 struct conf *conf = isns->i_conf; 975 int s; 976 char hostname[256]; 977 978 if (TAILQ_EMPTY(&conf->conf_targets) || 979 TAILQ_EMPTY(&conf->conf_portal_groups)) 980 return; 981 set_timeout(conf->conf_isns_timeout, false); 982 s = isns_do_connect(isns); 983 if (s < 0) 984 return; 985 gethostname(hostname, sizeof(hostname)); 986 987 isns_do_deregister(isns, s, hostname); 988 close(s); 989 set_timeout(0, false); 990 } 991 992 int 993 portal_group_set_filter(struct portal_group *pg, const char *str) 994 { 995 int filter; 996 997 if (strcmp(str, "none") == 0) { 998 filter = PG_FILTER_NONE; 999 } else if (strcmp(str, "portal") == 0) { 1000 filter = PG_FILTER_PORTAL; 1001 } else if (strcmp(str, "portal-name") == 0) { 1002 filter = PG_FILTER_PORTAL_NAME; 1003 } else if (strcmp(str, "portal-name-auth") == 0) { 1004 filter = PG_FILTER_PORTAL_NAME_AUTH; 1005 } else { 1006 log_warnx("invalid discovery-filter \"%s\" for portal-group " 1007 "\"%s\"; valid values are \"none\", \"portal\", " 1008 "\"portal-name\", and \"portal-name-auth\"", 1009 str, pg->pg_name); 1010 return (1); 1011 } 1012 1013 if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN && 1014 pg->pg_discovery_filter != filter) { 1015 log_warnx("cannot set discovery-filter to \"%s\" for " 1016 "portal-group \"%s\"; already has a different " 1017 "value", str, pg->pg_name); 1018 return (1); 1019 } 1020 1021 pg->pg_discovery_filter = filter; 1022 1023 return (0); 1024 } 1025 1026 int 1027 portal_group_set_offload(struct portal_group *pg, const char *offload) 1028 { 1029 1030 if (pg->pg_offload != NULL) { 1031 log_warnx("cannot set offload to \"%s\" for " 1032 "portal-group \"%s\"; already defined", 1033 offload, pg->pg_name); 1034 return (1); 1035 } 1036 1037 pg->pg_offload = checked_strdup(offload); 1038 1039 return (0); 1040 } 1041 1042 int 1043 portal_group_set_redirection(struct portal_group *pg, const char *addr) 1044 { 1045 1046 if (pg->pg_redirection != NULL) { 1047 log_warnx("cannot set redirection to \"%s\" for " 1048 "portal-group \"%s\"; already defined", 1049 addr, pg->pg_name); 1050 return (1); 1051 } 1052 1053 pg->pg_redirection = checked_strdup(addr); 1054 1055 return (0); 1056 } 1057 1058 static bool 1059 valid_hex(const char ch) 1060 { 1061 switch (ch) { 1062 case '0': 1063 case '1': 1064 case '2': 1065 case '3': 1066 case '4': 1067 case '5': 1068 case '6': 1069 case '7': 1070 case '8': 1071 case '9': 1072 case 'a': 1073 case 'A': 1074 case 'b': 1075 case 'B': 1076 case 'c': 1077 case 'C': 1078 case 'd': 1079 case 'D': 1080 case 'e': 1081 case 'E': 1082 case 'f': 1083 case 'F': 1084 return (true); 1085 default: 1086 return (false); 1087 } 1088 } 1089 1090 bool 1091 valid_iscsi_name(const char *name) 1092 { 1093 int i; 1094 1095 if (strlen(name) >= MAX_NAME_LEN) { 1096 log_warnx("overlong name for target \"%s\"; max length allowed " 1097 "by iSCSI specification is %d characters", 1098 name, MAX_NAME_LEN); 1099 return (false); 1100 } 1101 1102 /* 1103 * In the cases below, we don't return an error, just in case the admin 1104 * was right, and we're wrong. 1105 */ 1106 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) { 1107 for (i = strlen("iqn."); name[i] != '\0'; i++) { 1108 /* 1109 * XXX: We should verify UTF-8 normalisation, as defined 1110 * by 3.2.6.2: iSCSI Name Encoding. 1111 */ 1112 if (isalnum(name[i])) 1113 continue; 1114 if (name[i] == '-' || name[i] == '.' || name[i] == ':') 1115 continue; 1116 log_warnx("invalid character \"%c\" in target name " 1117 "\"%s\"; allowed characters are letters, digits, " 1118 "'-', '.', and ':'", name[i], name); 1119 break; 1120 } 1121 /* 1122 * XXX: Check more stuff: valid date and a valid reversed domain. 1123 */ 1124 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) { 1125 if (strlen(name) != strlen("eui.") + 16) 1126 log_warnx("invalid target name \"%s\"; the \"eui.\" " 1127 "should be followed by exactly 16 hexadecimal " 1128 "digits", name); 1129 for (i = strlen("eui."); name[i] != '\0'; i++) { 1130 if (!valid_hex(name[i])) { 1131 log_warnx("invalid character \"%c\" in target " 1132 "name \"%s\"; allowed characters are 1-9 " 1133 "and A-F", name[i], name); 1134 break; 1135 } 1136 } 1137 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) { 1138 if (strlen(name) > strlen("naa.") + 32) 1139 log_warnx("invalid target name \"%s\"; the \"naa.\" " 1140 "should be followed by at most 32 hexadecimal " 1141 "digits", name); 1142 for (i = strlen("naa."); name[i] != '\0'; i++) { 1143 if (!valid_hex(name[i])) { 1144 log_warnx("invalid character \"%c\" in target " 1145 "name \"%s\"; allowed characters are 1-9 " 1146 "and A-F", name[i], name); 1147 break; 1148 } 1149 } 1150 } else { 1151 log_warnx("invalid target name \"%s\"; should start with " 1152 "either \".iqn\", \"eui.\", or \"naa.\"", 1153 name); 1154 } 1155 return (true); 1156 } 1157 1158 struct pport * 1159 pport_new(struct conf *conf, const char *name, uint32_t ctl_port) 1160 { 1161 struct pport *pp; 1162 1163 pp = calloc(1, sizeof(*pp)); 1164 if (pp == NULL) 1165 log_err(1, "calloc"); 1166 pp->pp_conf = conf; 1167 pp->pp_name = checked_strdup(name); 1168 pp->pp_ctl_port = ctl_port; 1169 TAILQ_INIT(&pp->pp_ports); 1170 TAILQ_INSERT_TAIL(&conf->conf_pports, pp, pp_next); 1171 return (pp); 1172 } 1173 1174 struct pport * 1175 pport_find(const struct conf *conf, const char *name) 1176 { 1177 struct pport *pp; 1178 1179 TAILQ_FOREACH(pp, &conf->conf_pports, pp_next) { 1180 if (strcasecmp(pp->pp_name, name) == 0) 1181 return (pp); 1182 } 1183 return (NULL); 1184 } 1185 1186 struct pport * 1187 pport_copy(struct pport *pp, struct conf *conf) 1188 { 1189 struct pport *ppnew; 1190 1191 ppnew = pport_new(conf, pp->pp_name, pp->pp_ctl_port); 1192 return (ppnew); 1193 } 1194 1195 void 1196 pport_delete(struct pport *pp) 1197 { 1198 struct port *port, *tport; 1199 1200 TAILQ_FOREACH_SAFE(port, &pp->pp_ports, p_ts, tport) 1201 port_delete(port); 1202 TAILQ_REMOVE(&pp->pp_conf->conf_pports, pp, pp_next); 1203 free(pp->pp_name); 1204 free(pp); 1205 } 1206 1207 struct port * 1208 port_new(struct conf *conf, struct target *target, struct portal_group *pg) 1209 { 1210 struct port *port; 1211 char *name; 1212 int ret; 1213 1214 ret = asprintf(&name, "%s-%s", pg->pg_name, target->t_name); 1215 if (ret <= 0) 1216 log_err(1, "asprintf"); 1217 if (port_find(conf, name) != NULL) { 1218 log_warnx("duplicate port \"%s\"", name); 1219 free(name); 1220 return (NULL); 1221 } 1222 port = calloc(1, sizeof(*port)); 1223 if (port == NULL) 1224 log_err(1, "calloc"); 1225 port->p_conf = conf; 1226 port->p_name = name; 1227 TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next); 1228 TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts); 1229 port->p_target = target; 1230 TAILQ_INSERT_TAIL(&pg->pg_ports, port, p_pgs); 1231 port->p_portal_group = pg; 1232 return (port); 1233 } 1234 1235 struct port * 1236 port_new_pp(struct conf *conf, struct target *target, struct pport *pp) 1237 { 1238 struct port *port; 1239 char *name; 1240 int ret; 1241 1242 ret = asprintf(&name, "%s-%s", pp->pp_name, target->t_name); 1243 if (ret <= 0) 1244 log_err(1, "asprintf"); 1245 if (port_find(conf, name) != NULL) { 1246 log_warnx("duplicate port \"%s\"", name); 1247 free(name); 1248 return (NULL); 1249 } 1250 port = calloc(1, sizeof(*port)); 1251 if (port == NULL) 1252 log_err(1, "calloc"); 1253 port->p_conf = conf; 1254 port->p_name = name; 1255 TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next); 1256 TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts); 1257 port->p_target = target; 1258 TAILQ_INSERT_TAIL(&pp->pp_ports, port, p_pps); 1259 port->p_pport = pp; 1260 return (port); 1261 } 1262 1263 struct port * 1264 port_find(const struct conf *conf, const char *name) 1265 { 1266 struct port *port; 1267 1268 TAILQ_FOREACH(port, &conf->conf_ports, p_next) { 1269 if (strcasecmp(port->p_name, name) == 0) 1270 return (port); 1271 } 1272 1273 return (NULL); 1274 } 1275 1276 struct port * 1277 port_find_in_pg(const struct portal_group *pg, const char *target) 1278 { 1279 struct port *port; 1280 1281 TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) { 1282 if (strcasecmp(port->p_target->t_name, target) == 0) 1283 return (port); 1284 } 1285 1286 return (NULL); 1287 } 1288 1289 void 1290 port_delete(struct port *port) 1291 { 1292 1293 if (port->p_portal_group) 1294 TAILQ_REMOVE(&port->p_portal_group->pg_ports, port, p_pgs); 1295 if (port->p_pport) 1296 TAILQ_REMOVE(&port->p_pport->pp_ports, port, p_pps); 1297 if (port->p_target) 1298 TAILQ_REMOVE(&port->p_target->t_ports, port, p_ts); 1299 TAILQ_REMOVE(&port->p_conf->conf_ports, port, p_next); 1300 free(port->p_name); 1301 free(port); 1302 } 1303 1304 struct target * 1305 target_new(struct conf *conf, const char *name) 1306 { 1307 struct target *targ; 1308 int i, len; 1309 1310 targ = target_find(conf, name); 1311 if (targ != NULL) { 1312 log_warnx("duplicated target \"%s\"", name); 1313 return (NULL); 1314 } 1315 if (valid_iscsi_name(name) == false) { 1316 log_warnx("target name \"%s\" is invalid", name); 1317 return (NULL); 1318 } 1319 targ = calloc(1, sizeof(*targ)); 1320 if (targ == NULL) 1321 log_err(1, "calloc"); 1322 targ->t_name = checked_strdup(name); 1323 1324 /* 1325 * RFC 3722 requires us to normalize the name to lowercase. 1326 */ 1327 len = strlen(name); 1328 for (i = 0; i < len; i++) 1329 targ->t_name[i] = tolower(targ->t_name[i]); 1330 1331 targ->t_conf = conf; 1332 TAILQ_INIT(&targ->t_ports); 1333 TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next); 1334 1335 return (targ); 1336 } 1337 1338 void 1339 target_delete(struct target *targ) 1340 { 1341 struct port *port, *tport; 1342 1343 TAILQ_FOREACH_SAFE(port, &targ->t_ports, p_ts, tport) 1344 port_delete(port); 1345 TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next); 1346 1347 free(targ->t_name); 1348 free(targ->t_redirection); 1349 free(targ); 1350 } 1351 1352 struct target * 1353 target_find(struct conf *conf, const char *name) 1354 { 1355 struct target *targ; 1356 1357 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1358 if (strcasecmp(targ->t_name, name) == 0) 1359 return (targ); 1360 } 1361 1362 return (NULL); 1363 } 1364 1365 int 1366 target_set_redirection(struct target *target, const char *addr) 1367 { 1368 1369 if (target->t_redirection != NULL) { 1370 log_warnx("cannot set redirection to \"%s\" for " 1371 "target \"%s\"; already defined", 1372 addr, target->t_name); 1373 return (1); 1374 } 1375 1376 target->t_redirection = checked_strdup(addr); 1377 1378 return (0); 1379 } 1380 1381 struct lun * 1382 lun_new(struct conf *conf, const char *name) 1383 { 1384 struct lun *lun; 1385 1386 lun = lun_find(conf, name); 1387 if (lun != NULL) { 1388 log_warnx("duplicated lun \"%s\"", name); 1389 return (NULL); 1390 } 1391 1392 lun = calloc(1, sizeof(*lun)); 1393 if (lun == NULL) 1394 log_err(1, "calloc"); 1395 lun->l_conf = conf; 1396 lun->l_name = checked_strdup(name); 1397 TAILQ_INIT(&lun->l_options); 1398 TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next); 1399 1400 return (lun); 1401 } 1402 1403 void 1404 lun_delete(struct lun *lun) 1405 { 1406 struct target *targ; 1407 struct lun_option *lo, *tmp; 1408 int i; 1409 1410 TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) { 1411 for (i = 0; i < MAX_LUNS; i++) { 1412 if (targ->t_luns[i] == lun) 1413 targ->t_luns[i] = NULL; 1414 } 1415 } 1416 TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next); 1417 1418 TAILQ_FOREACH_SAFE(lo, &lun->l_options, lo_next, tmp) 1419 lun_option_delete(lo); 1420 free(lun->l_name); 1421 free(lun->l_backend); 1422 free(lun->l_device_id); 1423 free(lun->l_path); 1424 free(lun->l_scsiname); 1425 free(lun->l_serial); 1426 free(lun); 1427 } 1428 1429 struct lun * 1430 lun_find(const struct conf *conf, const char *name) 1431 { 1432 struct lun *lun; 1433 1434 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1435 if (strcmp(lun->l_name, name) == 0) 1436 return (lun); 1437 } 1438 1439 return (NULL); 1440 } 1441 1442 void 1443 lun_set_backend(struct lun *lun, const char *value) 1444 { 1445 free(lun->l_backend); 1446 lun->l_backend = checked_strdup(value); 1447 } 1448 1449 void 1450 lun_set_blocksize(struct lun *lun, size_t value) 1451 { 1452 1453 lun->l_blocksize = value; 1454 } 1455 1456 void 1457 lun_set_device_id(struct lun *lun, const char *value) 1458 { 1459 free(lun->l_device_id); 1460 lun->l_device_id = checked_strdup(value); 1461 } 1462 1463 void 1464 lun_set_path(struct lun *lun, const char *value) 1465 { 1466 free(lun->l_path); 1467 lun->l_path = checked_strdup(value); 1468 } 1469 1470 void 1471 lun_set_scsiname(struct lun *lun, const char *value) 1472 { 1473 free(lun->l_scsiname); 1474 lun->l_scsiname = checked_strdup(value); 1475 } 1476 1477 void 1478 lun_set_serial(struct lun *lun, const char *value) 1479 { 1480 free(lun->l_serial); 1481 lun->l_serial = checked_strdup(value); 1482 } 1483 1484 void 1485 lun_set_size(struct lun *lun, size_t value) 1486 { 1487 1488 lun->l_size = value; 1489 } 1490 1491 void 1492 lun_set_ctl_lun(struct lun *lun, uint32_t value) 1493 { 1494 1495 lun->l_ctl_lun = value; 1496 } 1497 1498 struct lun_option * 1499 lun_option_new(struct lun *lun, const char *name, const char *value) 1500 { 1501 struct lun_option *lo; 1502 1503 lo = lun_option_find(lun, name); 1504 if (lo != NULL) { 1505 log_warnx("duplicated lun option \"%s\" for lun \"%s\"", 1506 name, lun->l_name); 1507 return (NULL); 1508 } 1509 1510 lo = calloc(1, sizeof(*lo)); 1511 if (lo == NULL) 1512 log_err(1, "calloc"); 1513 lo->lo_name = checked_strdup(name); 1514 lo->lo_value = checked_strdup(value); 1515 lo->lo_lun = lun; 1516 TAILQ_INSERT_TAIL(&lun->l_options, lo, lo_next); 1517 1518 return (lo); 1519 } 1520 1521 void 1522 lun_option_delete(struct lun_option *lo) 1523 { 1524 1525 TAILQ_REMOVE(&lo->lo_lun->l_options, lo, lo_next); 1526 1527 free(lo->lo_name); 1528 free(lo->lo_value); 1529 free(lo); 1530 } 1531 1532 struct lun_option * 1533 lun_option_find(const struct lun *lun, const char *name) 1534 { 1535 struct lun_option *lo; 1536 1537 TAILQ_FOREACH(lo, &lun->l_options, lo_next) { 1538 if (strcmp(lo->lo_name, name) == 0) 1539 return (lo); 1540 } 1541 1542 return (NULL); 1543 } 1544 1545 void 1546 lun_option_set(struct lun_option *lo, const char *value) 1547 { 1548 1549 free(lo->lo_value); 1550 lo->lo_value = checked_strdup(value); 1551 } 1552 1553 static struct connection * 1554 connection_new(struct portal *portal, int fd, const char *host, 1555 const struct sockaddr *client_sa) 1556 { 1557 struct connection *conn; 1558 1559 conn = calloc(1, sizeof(*conn)); 1560 if (conn == NULL) 1561 log_err(1, "calloc"); 1562 conn->conn_portal = portal; 1563 conn->conn_socket = fd; 1564 conn->conn_initiator_addr = checked_strdup(host); 1565 memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len); 1566 1567 /* 1568 * Default values, from RFC 3720, section 12. 1569 */ 1570 conn->conn_max_data_segment_length = 8192; 1571 conn->conn_max_burst_length = 262144; 1572 conn->conn_immediate_data = true; 1573 1574 return (conn); 1575 } 1576 1577 #if 0 1578 static void 1579 conf_print(struct conf *conf) 1580 { 1581 struct auth_group *ag; 1582 struct auth *auth; 1583 struct auth_name *auth_name; 1584 struct auth_portal *auth_portal; 1585 struct portal_group *pg; 1586 struct portal *portal; 1587 struct target *targ; 1588 struct lun *lun; 1589 struct lun_option *lo; 1590 1591 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1592 fprintf(stderr, "auth-group %s {\n", ag->ag_name); 1593 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) 1594 fprintf(stderr, "\t chap-mutual %s %s %s %s\n", 1595 auth->a_user, auth->a_secret, 1596 auth->a_mutual_user, auth->a_mutual_secret); 1597 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) 1598 fprintf(stderr, "\t initiator-name %s\n", 1599 auth_name->an_initator_name); 1600 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next) 1601 fprintf(stderr, "\t initiator-portal %s\n", 1602 auth_portal->an_initator_portal); 1603 fprintf(stderr, "}\n"); 1604 } 1605 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1606 fprintf(stderr, "portal-group %s {\n", pg->pg_name); 1607 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 1608 fprintf(stderr, "\t listen %s\n", portal->p_listen); 1609 fprintf(stderr, "}\n"); 1610 } 1611 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1612 fprintf(stderr, "\tlun %s {\n", lun->l_name); 1613 fprintf(stderr, "\t\tpath %s\n", lun->l_path); 1614 TAILQ_FOREACH(lo, &lun->l_options, lo_next) 1615 fprintf(stderr, "\t\toption %s %s\n", 1616 lo->lo_name, lo->lo_value); 1617 fprintf(stderr, "\t}\n"); 1618 } 1619 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1620 fprintf(stderr, "target %s {\n", targ->t_name); 1621 if (targ->t_alias != NULL) 1622 fprintf(stderr, "\t alias %s\n", targ->t_alias); 1623 fprintf(stderr, "}\n"); 1624 } 1625 } 1626 #endif 1627 1628 static int 1629 conf_verify_lun(struct lun *lun) 1630 { 1631 const struct lun *lun2; 1632 1633 if (lun->l_backend == NULL) 1634 lun_set_backend(lun, "block"); 1635 if (strcmp(lun->l_backend, "block") == 0) { 1636 if (lun->l_path == NULL) { 1637 log_warnx("missing path for lun \"%s\"", 1638 lun->l_name); 1639 return (1); 1640 } 1641 } else if (strcmp(lun->l_backend, "ramdisk") == 0) { 1642 if (lun->l_size == 0) { 1643 log_warnx("missing size for ramdisk-backed lun \"%s\"", 1644 lun->l_name); 1645 return (1); 1646 } 1647 if (lun->l_path != NULL) { 1648 log_warnx("path must not be specified " 1649 "for ramdisk-backed lun \"%s\"", 1650 lun->l_name); 1651 return (1); 1652 } 1653 } 1654 if (lun->l_blocksize == 0) { 1655 lun_set_blocksize(lun, DEFAULT_BLOCKSIZE); 1656 } else if (lun->l_blocksize < 0) { 1657 log_warnx("invalid blocksize for lun \"%s\"; " 1658 "must be larger than 0", lun->l_name); 1659 return (1); 1660 } 1661 if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) { 1662 log_warnx("invalid size for lun \"%s\"; " 1663 "must be multiple of blocksize", lun->l_name); 1664 return (1); 1665 } 1666 TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) { 1667 if (lun == lun2) 1668 continue; 1669 if (lun->l_path != NULL && lun2->l_path != NULL && 1670 strcmp(lun->l_path, lun2->l_path) == 0) { 1671 log_debugx("WARNING: path \"%s\" duplicated " 1672 "between lun \"%s\", and " 1673 "lun \"%s\"", lun->l_path, 1674 lun->l_name, lun2->l_name); 1675 } 1676 } 1677 1678 return (0); 1679 } 1680 1681 int 1682 conf_verify(struct conf *conf) 1683 { 1684 struct auth_group *ag; 1685 struct portal_group *pg; 1686 struct port *port; 1687 struct target *targ; 1688 struct lun *lun; 1689 bool found; 1690 int error, i; 1691 1692 if (conf->conf_pidfile_path == NULL) 1693 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE); 1694 1695 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1696 error = conf_verify_lun(lun); 1697 if (error != 0) 1698 return (error); 1699 } 1700 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1701 if (targ->t_auth_group == NULL) { 1702 targ->t_auth_group = auth_group_find(conf, 1703 "default"); 1704 assert(targ->t_auth_group != NULL); 1705 } 1706 if (TAILQ_EMPTY(&targ->t_ports)) { 1707 pg = portal_group_find(conf, "default"); 1708 assert(pg != NULL); 1709 port_new(conf, targ, pg); 1710 } 1711 found = false; 1712 for (i = 0; i < MAX_LUNS; i++) { 1713 if (targ->t_luns[i] != NULL) 1714 found = true; 1715 } 1716 if (!found && targ->t_redirection == NULL) { 1717 log_warnx("no LUNs defined for target \"%s\"", 1718 targ->t_name); 1719 } 1720 if (found && targ->t_redirection != NULL) { 1721 log_debugx("target \"%s\" contains luns, " 1722 " but configured for redirection", 1723 targ->t_name); 1724 } 1725 } 1726 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1727 assert(pg->pg_name != NULL); 1728 if (pg->pg_discovery_auth_group == NULL) { 1729 pg->pg_discovery_auth_group = 1730 auth_group_find(conf, "default"); 1731 assert(pg->pg_discovery_auth_group != NULL); 1732 } 1733 1734 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN) 1735 pg->pg_discovery_filter = PG_FILTER_NONE; 1736 1737 if (!TAILQ_EMPTY(&pg->pg_ports)) { 1738 if (pg->pg_redirection != NULL) { 1739 log_debugx("portal-group \"%s\" assigned " 1740 "to target, but configured " 1741 "for redirection", 1742 pg->pg_name); 1743 } 1744 pg->pg_unassigned = false; 1745 } else { 1746 if (strcmp(pg->pg_name, "default") != 0) 1747 log_warnx("portal-group \"%s\" not assigned " 1748 "to any target", pg->pg_name); 1749 pg->pg_unassigned = true; 1750 } 1751 } 1752 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1753 if (ag->ag_name == NULL) 1754 assert(ag->ag_target != NULL); 1755 else 1756 assert(ag->ag_target == NULL); 1757 1758 found = false; 1759 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1760 if (targ->t_auth_group == ag) { 1761 found = true; 1762 break; 1763 } 1764 } 1765 TAILQ_FOREACH(port, &conf->conf_ports, p_next) { 1766 if (port->p_auth_group == ag) { 1767 found = true; 1768 break; 1769 } 1770 } 1771 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1772 if (pg->pg_discovery_auth_group == ag) { 1773 found = true; 1774 break; 1775 } 1776 } 1777 if (!found && ag->ag_name != NULL && 1778 strcmp(ag->ag_name, "default") != 0 && 1779 strcmp(ag->ag_name, "no-authentication") != 0 && 1780 strcmp(ag->ag_name, "no-access") != 0) { 1781 log_warnx("auth-group \"%s\" not assigned " 1782 "to any target", ag->ag_name); 1783 } 1784 } 1785 1786 return (0); 1787 } 1788 1789 static int 1790 conf_apply(struct conf *oldconf, struct conf *newconf) 1791 { 1792 struct lun *oldlun, *newlun, *tmplun; 1793 struct portal_group *oldpg, *newpg; 1794 struct portal *oldp, *newp; 1795 struct port *oldport, *newport, *tmpport; 1796 struct isns *oldns, *newns; 1797 pid_t otherpid; 1798 int changed, cumulated_error = 0, error, sockbuf; 1799 int one = 1; 1800 1801 if (oldconf->conf_debug != newconf->conf_debug) { 1802 log_debugx("changing debug level to %d", newconf->conf_debug); 1803 log_init(newconf->conf_debug); 1804 } 1805 1806 if (oldconf->conf_pidfh != NULL) { 1807 assert(oldconf->conf_pidfile_path != NULL); 1808 if (newconf->conf_pidfile_path != NULL && 1809 strcmp(oldconf->conf_pidfile_path, 1810 newconf->conf_pidfile_path) == 0) { 1811 newconf->conf_pidfh = oldconf->conf_pidfh; 1812 oldconf->conf_pidfh = NULL; 1813 } else { 1814 log_debugx("removing pidfile %s", 1815 oldconf->conf_pidfile_path); 1816 pidfile_remove(oldconf->conf_pidfh); 1817 oldconf->conf_pidfh = NULL; 1818 } 1819 } 1820 1821 if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) { 1822 log_debugx("opening pidfile %s", newconf->conf_pidfile_path); 1823 newconf->conf_pidfh = 1824 pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid); 1825 if (newconf->conf_pidfh == NULL) { 1826 if (errno == EEXIST) 1827 log_errx(1, "daemon already running, pid: %jd.", 1828 (intmax_t)otherpid); 1829 log_err(1, "cannot open or create pidfile \"%s\"", 1830 newconf->conf_pidfile_path); 1831 } 1832 } 1833 1834 /* 1835 * Go through the new portal groups, assigning tags or preserving old. 1836 */ 1837 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 1838 oldpg = portal_group_find(oldconf, newpg->pg_name); 1839 if (oldpg != NULL) 1840 newpg->pg_tag = oldpg->pg_tag; 1841 else 1842 newpg->pg_tag = ++last_portal_group_tag; 1843 } 1844 1845 /* Deregister on removed iSNS servers. */ 1846 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) { 1847 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) { 1848 if (strcmp(oldns->i_addr, newns->i_addr) == 0) 1849 break; 1850 } 1851 if (newns == NULL) 1852 isns_deregister(oldns); 1853 } 1854 1855 /* 1856 * XXX: If target or lun removal fails, we should somehow "move" 1857 * the old lun or target into newconf, so that subsequent 1858 * conf_apply() would try to remove them again. That would 1859 * be somewhat hairy, though, and lun deletion failures don't 1860 * really happen, so leave it as it is for now. 1861 */ 1862 /* 1863 * First, remove any ports present in the old configuration 1864 * and missing in the new one. 1865 */ 1866 TAILQ_FOREACH_SAFE(oldport, &oldconf->conf_ports, p_next, tmpport) { 1867 newport = port_find(newconf, oldport->p_name); 1868 if (newport != NULL) 1869 continue; 1870 log_debugx("removing port \"%s\"", oldport->p_name); 1871 error = kernel_port_remove(oldport); 1872 if (error != 0) { 1873 log_warnx("failed to remove port %s", 1874 oldport->p_name); 1875 /* 1876 * XXX: Uncomment after fixing the root cause. 1877 * 1878 * cumulated_error++; 1879 */ 1880 } 1881 } 1882 1883 /* 1884 * Second, remove any LUNs present in the old configuration 1885 * and missing in the new one. 1886 */ 1887 TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) { 1888 newlun = lun_find(newconf, oldlun->l_name); 1889 if (newlun == NULL) { 1890 log_debugx("lun \"%s\", CTL lun %d " 1891 "not found in new configuration; " 1892 "removing", oldlun->l_name, oldlun->l_ctl_lun); 1893 error = kernel_lun_remove(oldlun); 1894 if (error != 0) { 1895 log_warnx("failed to remove lun \"%s\", " 1896 "CTL lun %d", 1897 oldlun->l_name, oldlun->l_ctl_lun); 1898 cumulated_error++; 1899 } 1900 continue; 1901 } 1902 1903 /* 1904 * Also remove the LUNs changed by more than size. 1905 */ 1906 changed = 0; 1907 assert(oldlun->l_backend != NULL); 1908 assert(newlun->l_backend != NULL); 1909 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) { 1910 log_debugx("backend for lun \"%s\", " 1911 "CTL lun %d changed; removing", 1912 oldlun->l_name, oldlun->l_ctl_lun); 1913 changed = 1; 1914 } 1915 if (oldlun->l_blocksize != newlun->l_blocksize) { 1916 log_debugx("blocksize for lun \"%s\", " 1917 "CTL lun %d changed; removing", 1918 oldlun->l_name, oldlun->l_ctl_lun); 1919 changed = 1; 1920 } 1921 if (newlun->l_device_id != NULL && 1922 (oldlun->l_device_id == NULL || 1923 strcmp(oldlun->l_device_id, newlun->l_device_id) != 1924 0)) { 1925 log_debugx("device-id for lun \"%s\", " 1926 "CTL lun %d changed; removing", 1927 oldlun->l_name, oldlun->l_ctl_lun); 1928 changed = 1; 1929 } 1930 if (newlun->l_path != NULL && 1931 (oldlun->l_path == NULL || 1932 strcmp(oldlun->l_path, newlun->l_path) != 0)) { 1933 log_debugx("path for lun \"%s\", " 1934 "CTL lun %d, changed; removing", 1935 oldlun->l_name, oldlun->l_ctl_lun); 1936 changed = 1; 1937 } 1938 if (newlun->l_serial != NULL && 1939 (oldlun->l_serial == NULL || 1940 strcmp(oldlun->l_serial, newlun->l_serial) != 0)) { 1941 log_debugx("serial for lun \"%s\", " 1942 "CTL lun %d changed; removing", 1943 oldlun->l_name, oldlun->l_ctl_lun); 1944 changed = 1; 1945 } 1946 if (changed) { 1947 error = kernel_lun_remove(oldlun); 1948 if (error != 0) { 1949 log_warnx("failed to remove lun \"%s\", " 1950 "CTL lun %d", 1951 oldlun->l_name, oldlun->l_ctl_lun); 1952 cumulated_error++; 1953 } 1954 lun_delete(oldlun); 1955 continue; 1956 } 1957 1958 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun); 1959 } 1960 1961 TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) { 1962 oldlun = lun_find(oldconf, newlun->l_name); 1963 if (oldlun != NULL) { 1964 if (newlun->l_size != oldlun->l_size || 1965 newlun->l_size == 0) { 1966 log_debugx("resizing lun \"%s\", CTL lun %d", 1967 newlun->l_name, newlun->l_ctl_lun); 1968 error = kernel_lun_resize(newlun); 1969 if (error != 0) { 1970 log_warnx("failed to " 1971 "resize lun \"%s\", CTL lun %d", 1972 newlun->l_name, 1973 newlun->l_ctl_lun); 1974 cumulated_error++; 1975 } 1976 } 1977 continue; 1978 } 1979 log_debugx("adding lun \"%s\"", newlun->l_name); 1980 error = kernel_lun_add(newlun); 1981 if (error != 0) { 1982 log_warnx("failed to add lun \"%s\"", newlun->l_name); 1983 lun_delete(newlun); 1984 cumulated_error++; 1985 } 1986 } 1987 1988 /* 1989 * Now add new ports or modify existing ones. 1990 */ 1991 TAILQ_FOREACH(newport, &newconf->conf_ports, p_next) { 1992 oldport = port_find(oldconf, newport->p_name); 1993 1994 if (oldport == NULL) { 1995 log_debugx("adding port \"%s\"", newport->p_name); 1996 error = kernel_port_add(newport); 1997 } else { 1998 log_debugx("updating port \"%s\"", newport->p_name); 1999 newport->p_ctl_port = oldport->p_ctl_port; 2000 error = kernel_port_update(newport); 2001 } 2002 if (error != 0) { 2003 log_warnx("failed to %s port %s", 2004 (oldport == NULL) ? "add" : "update", 2005 newport->p_name); 2006 /* 2007 * XXX: Uncomment after fixing the root cause. 2008 * 2009 * cumulated_error++; 2010 */ 2011 } 2012 } 2013 2014 /* 2015 * Go through the new portals, opening the sockets as neccessary. 2016 */ 2017 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 2018 if (newpg->pg_unassigned) { 2019 log_debugx("not listening on portal-group \"%s\", " 2020 "not assigned to any target", 2021 newpg->pg_name); 2022 continue; 2023 } 2024 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) { 2025 /* 2026 * Try to find already open portal and reuse 2027 * the listening socket. We don't care about 2028 * what portal or portal group that was, what 2029 * matters is the listening address. 2030 */ 2031 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, 2032 pg_next) { 2033 TAILQ_FOREACH(oldp, &oldpg->pg_portals, 2034 p_next) { 2035 if (strcmp(newp->p_listen, 2036 oldp->p_listen) == 0 && 2037 oldp->p_socket > 0) { 2038 newp->p_socket = 2039 oldp->p_socket; 2040 oldp->p_socket = 0; 2041 break; 2042 } 2043 } 2044 } 2045 if (newp->p_socket > 0) { 2046 /* 2047 * We're done with this portal. 2048 */ 2049 continue; 2050 } 2051 2052 #ifdef ICL_KERNEL_PROXY 2053 if (proxy_mode) { 2054 newpg->pg_conf->conf_portal_id++; 2055 newp->p_id = newpg->pg_conf->conf_portal_id; 2056 log_debugx("listening on %s, portal-group " 2057 "\"%s\", portal id %d, using ICL proxy", 2058 newp->p_listen, newpg->pg_name, newp->p_id); 2059 kernel_listen(newp->p_ai, newp->p_iser, 2060 newp->p_id); 2061 continue; 2062 } 2063 #endif 2064 assert(proxy_mode == false); 2065 assert(newp->p_iser == false); 2066 2067 log_debugx("listening on %s, portal-group \"%s\"", 2068 newp->p_listen, newpg->pg_name); 2069 newp->p_socket = socket(newp->p_ai->ai_family, 2070 newp->p_ai->ai_socktype, 2071 newp->p_ai->ai_protocol); 2072 if (newp->p_socket < 0) { 2073 log_warn("socket(2) failed for %s", 2074 newp->p_listen); 2075 cumulated_error++; 2076 continue; 2077 } 2078 sockbuf = SOCKBUF_SIZE; 2079 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF, 2080 &sockbuf, sizeof(sockbuf)) == -1) 2081 log_warn("setsockopt(SO_RCVBUF) failed " 2082 "for %s", newp->p_listen); 2083 sockbuf = SOCKBUF_SIZE; 2084 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF, 2085 &sockbuf, sizeof(sockbuf)) == -1) 2086 log_warn("setsockopt(SO_SNDBUF) failed " 2087 "for %s", newp->p_listen); 2088 error = setsockopt(newp->p_socket, SOL_SOCKET, 2089 SO_REUSEADDR, &one, sizeof(one)); 2090 if (error != 0) { 2091 log_warn("setsockopt(SO_REUSEADDR) failed " 2092 "for %s", newp->p_listen); 2093 close(newp->p_socket); 2094 newp->p_socket = 0; 2095 cumulated_error++; 2096 continue; 2097 } 2098 error = bind(newp->p_socket, newp->p_ai->ai_addr, 2099 newp->p_ai->ai_addrlen); 2100 if (error != 0) { 2101 log_warn("bind(2) failed for %s", 2102 newp->p_listen); 2103 close(newp->p_socket); 2104 newp->p_socket = 0; 2105 cumulated_error++; 2106 continue; 2107 } 2108 error = listen(newp->p_socket, -1); 2109 if (error != 0) { 2110 log_warn("listen(2) failed for %s", 2111 newp->p_listen); 2112 close(newp->p_socket); 2113 newp->p_socket = 0; 2114 cumulated_error++; 2115 continue; 2116 } 2117 } 2118 } 2119 2120 /* 2121 * Go through the no longer used sockets, closing them. 2122 */ 2123 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) { 2124 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) { 2125 if (oldp->p_socket <= 0) 2126 continue; 2127 log_debugx("closing socket for %s, portal-group \"%s\"", 2128 oldp->p_listen, oldpg->pg_name); 2129 close(oldp->p_socket); 2130 oldp->p_socket = 0; 2131 } 2132 } 2133 2134 /* (Re-)Register on remaining/new iSNS servers. */ 2135 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) { 2136 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) { 2137 if (strcmp(oldns->i_addr, newns->i_addr) == 0) 2138 break; 2139 } 2140 isns_register(newns, oldns); 2141 } 2142 2143 /* Schedule iSNS update */ 2144 if (!TAILQ_EMPTY(&newconf->conf_isns)) 2145 set_timeout((newconf->conf_isns_period + 2) / 3, false); 2146 2147 return (cumulated_error); 2148 } 2149 2150 bool 2151 timed_out(void) 2152 { 2153 2154 return (sigalrm_received); 2155 } 2156 2157 static void 2158 sigalrm_handler_fatal(int dummy __unused) 2159 { 2160 /* 2161 * It would be easiest to just log an error and exit. We can't 2162 * do this, though, because log_errx() is not signal safe, since 2163 * it calls syslog(3). Instead, set a flag checked by pdu_send() 2164 * and pdu_receive(), to call log_errx() there. Should they fail 2165 * to notice, we'll exit here one second later. 2166 */ 2167 if (sigalrm_received) { 2168 /* 2169 * Oh well. Just give up and quit. 2170 */ 2171 _exit(2); 2172 } 2173 2174 sigalrm_received = true; 2175 } 2176 2177 static void 2178 sigalrm_handler(int dummy __unused) 2179 { 2180 2181 sigalrm_received = true; 2182 } 2183 2184 void 2185 set_timeout(int timeout, int fatal) 2186 { 2187 struct sigaction sa; 2188 struct itimerval itv; 2189 int error; 2190 2191 if (timeout <= 0) { 2192 log_debugx("session timeout disabled"); 2193 bzero(&itv, sizeof(itv)); 2194 error = setitimer(ITIMER_REAL, &itv, NULL); 2195 if (error != 0) 2196 log_err(1, "setitimer"); 2197 sigalrm_received = false; 2198 return; 2199 } 2200 2201 sigalrm_received = false; 2202 bzero(&sa, sizeof(sa)); 2203 if (fatal) 2204 sa.sa_handler = sigalrm_handler_fatal; 2205 else 2206 sa.sa_handler = sigalrm_handler; 2207 sigfillset(&sa.sa_mask); 2208 error = sigaction(SIGALRM, &sa, NULL); 2209 if (error != 0) 2210 log_err(1, "sigaction"); 2211 2212 /* 2213 * First SIGALRM will arive after conf_timeout seconds. 2214 * If we do nothing, another one will arrive a second later. 2215 */ 2216 log_debugx("setting session timeout to %d seconds", timeout); 2217 bzero(&itv, sizeof(itv)); 2218 itv.it_interval.tv_sec = 1; 2219 itv.it_value.tv_sec = timeout; 2220 error = setitimer(ITIMER_REAL, &itv, NULL); 2221 if (error != 0) 2222 log_err(1, "setitimer"); 2223 } 2224 2225 static int 2226 wait_for_children(bool block) 2227 { 2228 pid_t pid; 2229 int status; 2230 int num = 0; 2231 2232 for (;;) { 2233 /* 2234 * If "block" is true, wait for at least one process. 2235 */ 2236 if (block && num == 0) 2237 pid = wait4(-1, &status, 0, NULL); 2238 else 2239 pid = wait4(-1, &status, WNOHANG, NULL); 2240 if (pid <= 0) 2241 break; 2242 if (WIFSIGNALED(status)) { 2243 log_warnx("child process %d terminated with signal %d", 2244 pid, WTERMSIG(status)); 2245 } else if (WEXITSTATUS(status) != 0) { 2246 log_warnx("child process %d terminated with exit status %d", 2247 pid, WEXITSTATUS(status)); 2248 } else { 2249 log_debugx("child process %d terminated gracefully", pid); 2250 } 2251 num++; 2252 } 2253 2254 return (num); 2255 } 2256 2257 static void 2258 handle_connection(struct portal *portal, int fd, 2259 const struct sockaddr *client_sa, bool dont_fork) 2260 { 2261 struct connection *conn; 2262 int error; 2263 pid_t pid; 2264 char host[NI_MAXHOST + 1]; 2265 struct conf *conf; 2266 2267 conf = portal->p_portal_group->pg_conf; 2268 2269 if (dont_fork) { 2270 log_debugx("incoming connection; not forking due to -d flag"); 2271 } else { 2272 nchildren -= wait_for_children(false); 2273 assert(nchildren >= 0); 2274 2275 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) { 2276 log_debugx("maxproc limit of %d child processes hit; " 2277 "waiting for child process to exit", conf->conf_maxproc); 2278 nchildren -= wait_for_children(true); 2279 assert(nchildren >= 0); 2280 } 2281 log_debugx("incoming connection; forking child process #%d", 2282 nchildren); 2283 nchildren++; 2284 pid = fork(); 2285 if (pid < 0) 2286 log_err(1, "fork"); 2287 if (pid > 0) { 2288 close(fd); 2289 return; 2290 } 2291 } 2292 pidfile_close(conf->conf_pidfh); 2293 2294 error = getnameinfo(client_sa, client_sa->sa_len, 2295 host, sizeof(host), NULL, 0, NI_NUMERICHOST); 2296 if (error != 0) 2297 log_errx(1, "getnameinfo: %s", gai_strerror(error)); 2298 2299 log_debugx("accepted connection from %s; portal group \"%s\"", 2300 host, portal->p_portal_group->pg_name); 2301 log_set_peer_addr(host); 2302 setproctitle("%s", host); 2303 2304 conn = connection_new(portal, fd, host, client_sa); 2305 set_timeout(conf->conf_timeout, true); 2306 kernel_capsicate(); 2307 login(conn); 2308 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) { 2309 kernel_handoff(conn); 2310 log_debugx("connection handed off to the kernel"); 2311 } else { 2312 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY); 2313 discovery(conn); 2314 } 2315 log_debugx("nothing more to do; exiting"); 2316 exit(0); 2317 } 2318 2319 static int 2320 fd_add(int fd, fd_set *fdset, int nfds) 2321 { 2322 2323 /* 2324 * Skip sockets which we failed to bind. 2325 */ 2326 if (fd <= 0) 2327 return (nfds); 2328 2329 FD_SET(fd, fdset); 2330 if (fd > nfds) 2331 nfds = fd; 2332 return (nfds); 2333 } 2334 2335 static void 2336 main_loop(struct conf *conf, bool dont_fork) 2337 { 2338 struct portal_group *pg; 2339 struct portal *portal; 2340 struct sockaddr_storage client_sa; 2341 socklen_t client_salen; 2342 #ifdef ICL_KERNEL_PROXY 2343 int connection_id; 2344 int portal_id; 2345 #endif 2346 fd_set fdset; 2347 int error, nfds, client_fd; 2348 2349 pidfile_write(conf->conf_pidfh); 2350 2351 for (;;) { 2352 if (sighup_received || sigterm_received || timed_out()) 2353 return; 2354 2355 #ifdef ICL_KERNEL_PROXY 2356 if (proxy_mode) { 2357 client_salen = sizeof(client_sa); 2358 kernel_accept(&connection_id, &portal_id, 2359 (struct sockaddr *)&client_sa, &client_salen); 2360 assert(client_salen >= client_sa.ss_len); 2361 2362 log_debugx("incoming connection, id %d, portal id %d", 2363 connection_id, portal_id); 2364 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2365 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 2366 if (portal->p_id == portal_id) { 2367 goto found; 2368 } 2369 } 2370 } 2371 2372 log_errx(1, "kernel returned invalid portal_id %d", 2373 portal_id); 2374 2375 found: 2376 handle_connection(portal, connection_id, 2377 (struct sockaddr *)&client_sa, dont_fork); 2378 } else { 2379 #endif 2380 assert(proxy_mode == false); 2381 2382 FD_ZERO(&fdset); 2383 nfds = 0; 2384 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2385 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 2386 nfds = fd_add(portal->p_socket, &fdset, nfds); 2387 } 2388 error = select(nfds + 1, &fdset, NULL, NULL, NULL); 2389 if (error <= 0) { 2390 if (errno == EINTR) 2391 return; 2392 log_err(1, "select"); 2393 } 2394 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2395 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 2396 if (!FD_ISSET(portal->p_socket, &fdset)) 2397 continue; 2398 client_salen = sizeof(client_sa); 2399 client_fd = accept(portal->p_socket, 2400 (struct sockaddr *)&client_sa, 2401 &client_salen); 2402 if (client_fd < 0) { 2403 if (errno == ECONNABORTED) 2404 continue; 2405 log_err(1, "accept"); 2406 } 2407 assert(client_salen >= client_sa.ss_len); 2408 2409 handle_connection(portal, client_fd, 2410 (struct sockaddr *)&client_sa, 2411 dont_fork); 2412 break; 2413 } 2414 } 2415 #ifdef ICL_KERNEL_PROXY 2416 } 2417 #endif 2418 } 2419 } 2420 2421 static void 2422 sighup_handler(int dummy __unused) 2423 { 2424 2425 sighup_received = true; 2426 } 2427 2428 static void 2429 sigterm_handler(int dummy __unused) 2430 { 2431 2432 sigterm_received = true; 2433 } 2434 2435 static void 2436 sigchld_handler(int dummy __unused) 2437 { 2438 2439 /* 2440 * The only purpose of this handler is to make SIGCHLD 2441 * interrupt the ISCSIDWAIT ioctl(2), so we can call 2442 * wait_for_children(). 2443 */ 2444 } 2445 2446 static void 2447 register_signals(void) 2448 { 2449 struct sigaction sa; 2450 int error; 2451 2452 bzero(&sa, sizeof(sa)); 2453 sa.sa_handler = sighup_handler; 2454 sigfillset(&sa.sa_mask); 2455 error = sigaction(SIGHUP, &sa, NULL); 2456 if (error != 0) 2457 log_err(1, "sigaction"); 2458 2459 sa.sa_handler = sigterm_handler; 2460 error = sigaction(SIGTERM, &sa, NULL); 2461 if (error != 0) 2462 log_err(1, "sigaction"); 2463 2464 sa.sa_handler = sigterm_handler; 2465 error = sigaction(SIGINT, &sa, NULL); 2466 if (error != 0) 2467 log_err(1, "sigaction"); 2468 2469 sa.sa_handler = sigchld_handler; 2470 error = sigaction(SIGCHLD, &sa, NULL); 2471 if (error != 0) 2472 log_err(1, "sigaction"); 2473 } 2474 2475 int 2476 main(int argc, char **argv) 2477 { 2478 struct conf *oldconf, *newconf, *tmpconf; 2479 struct isns *newns; 2480 const char *config_path = DEFAULT_CONFIG_PATH; 2481 int debug = 0, ch, error; 2482 bool dont_daemonize = false; 2483 2484 while ((ch = getopt(argc, argv, "df:R")) != -1) { 2485 switch (ch) { 2486 case 'd': 2487 dont_daemonize = true; 2488 debug++; 2489 break; 2490 case 'f': 2491 config_path = optarg; 2492 break; 2493 case 'R': 2494 #ifndef ICL_KERNEL_PROXY 2495 log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY " 2496 "does not support iSER protocol"); 2497 #endif 2498 proxy_mode = true; 2499 break; 2500 case '?': 2501 default: 2502 usage(); 2503 } 2504 } 2505 argc -= optind; 2506 if (argc != 0) 2507 usage(); 2508 2509 log_init(debug); 2510 kernel_init(); 2511 2512 oldconf = conf_new_from_kernel(); 2513 newconf = conf_new_from_file(config_path, oldconf); 2514 if (newconf == NULL) 2515 log_errx(1, "configuration error; exiting"); 2516 if (debug > 0) { 2517 oldconf->conf_debug = debug; 2518 newconf->conf_debug = debug; 2519 } 2520 2521 error = conf_apply(oldconf, newconf); 2522 if (error != 0) 2523 log_errx(1, "failed to apply configuration; exiting"); 2524 2525 conf_delete(oldconf); 2526 oldconf = NULL; 2527 2528 register_signals(); 2529 2530 if (dont_daemonize == false) { 2531 log_debugx("daemonizing"); 2532 if (daemon(0, 0) == -1) { 2533 log_warn("cannot daemonize"); 2534 pidfile_remove(newconf->conf_pidfh); 2535 exit(1); 2536 } 2537 } 2538 2539 /* Schedule iSNS update */ 2540 if (!TAILQ_EMPTY(&newconf->conf_isns)) 2541 set_timeout((newconf->conf_isns_period + 2) / 3, false); 2542 2543 for (;;) { 2544 main_loop(newconf, dont_daemonize); 2545 if (sighup_received) { 2546 sighup_received = false; 2547 log_debugx("received SIGHUP, reloading configuration"); 2548 tmpconf = conf_new_from_file(config_path, newconf); 2549 if (tmpconf == NULL) { 2550 log_warnx("configuration error, " 2551 "continuing with old configuration"); 2552 } else { 2553 if (debug > 0) 2554 tmpconf->conf_debug = debug; 2555 oldconf = newconf; 2556 newconf = tmpconf; 2557 error = conf_apply(oldconf, newconf); 2558 if (error != 0) 2559 log_warnx("failed to reload " 2560 "configuration"); 2561 conf_delete(oldconf); 2562 oldconf = NULL; 2563 } 2564 } else if (sigterm_received) { 2565 log_debugx("exiting on signal; " 2566 "reloading empty configuration"); 2567 2568 log_debugx("removing CTL iSCSI ports " 2569 "and terminating all connections"); 2570 2571 oldconf = newconf; 2572 newconf = conf_new(); 2573 if (debug > 0) 2574 newconf->conf_debug = debug; 2575 error = conf_apply(oldconf, newconf); 2576 if (error != 0) 2577 log_warnx("failed to apply configuration"); 2578 conf_delete(oldconf); 2579 oldconf = NULL; 2580 2581 log_warnx("exiting on signal"); 2582 exit(0); 2583 } else { 2584 nchildren -= wait_for_children(false); 2585 assert(nchildren >= 0); 2586 if (timed_out()) { 2587 set_timeout(0, false); 2588 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) 2589 isns_check(newns); 2590 /* Schedule iSNS update */ 2591 if (!TAILQ_EMPTY(&newconf->conf_isns)) { 2592 set_timeout((newconf->conf_isns_period 2593 + 2) / 3, 2594 false); 2595 } 2596 } 2597 } 2598 } 2599 /* NOTREACHED */ 2600 } 2601