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: releng/11.0/usr.sbin/ctld/ctld.c 302663 2016-07-12 13:12:01Z trasz $"); 33 34#include <sys/types.h> 35#include <sys/time.h> 36#include <sys/socket.h> 37#include <sys/stat.h> 38#include <sys/wait.h> 39#include <netinet/in.h> 40#include <arpa/inet.h> 41#include <assert.h> 42#include <ctype.h> 43#include <errno.h> 44#include <netdb.h> 45#include <signal.h> 46#include <stdbool.h> 47#include <stdio.h> 48#include <stdint.h> 49#include <stdlib.h> 50#include <string.h> 51#include <unistd.h> 52 53#include "ctld.h" 54#include "isns.h" 55 56bool proxy_mode = false; 57 58static volatile bool sighup_received = false; 59static volatile bool sigterm_received = false; 60static volatile bool sigalrm_received = false; 61 62static int nchildren = 0; 63static uint16_t last_portal_group_tag = 0xff; 64 65static void 66usage(void) 67{ 68 69 fprintf(stderr, "usage: ctld [-d][-u][-f config-file]\n"); 70 exit(1); 71} 72 73char * 74checked_strdup(const char *s) 75{ 76 char *c; 77 78 c = strdup(s); 79 if (c == NULL) 80 log_err(1, "strdup"); 81 return (c); 82} 83 84struct conf * 85conf_new(void) 86{ 87 struct conf *conf; 88 89 conf = calloc(1, sizeof(*conf)); 90 if (conf == NULL) 91 log_err(1, "calloc"); 92 TAILQ_INIT(&conf->conf_luns); 93 TAILQ_INIT(&conf->conf_targets); 94 TAILQ_INIT(&conf->conf_auth_groups); 95 TAILQ_INIT(&conf->conf_ports); 96 TAILQ_INIT(&conf->conf_portal_groups); 97 TAILQ_INIT(&conf->conf_pports); 98 TAILQ_INIT(&conf->conf_isns); 99 100 conf->conf_isns_period = 900; 101 conf->conf_isns_timeout = 5; 102 conf->conf_debug = 0; 103 conf->conf_timeout = 60; 104 conf->conf_maxproc = 30; 105 106 return (conf); 107} 108 109void 110conf_delete(struct conf *conf) 111{ 112 struct lun *lun, *ltmp; 113 struct target *targ, *tmp; 114 struct auth_group *ag, *cagtmp; 115 struct portal_group *pg, *cpgtmp; 116 struct pport *pp, *pptmp; 117 struct isns *is, *istmp; 118 119 assert(conf->conf_pidfh == NULL); 120 121 TAILQ_FOREACH_SAFE(lun, &conf->conf_luns, l_next, ltmp) 122 lun_delete(lun); 123 TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp) 124 target_delete(targ); 125 TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp) 126 auth_group_delete(ag); 127 TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp) 128 portal_group_delete(pg); 129 TAILQ_FOREACH_SAFE(pp, &conf->conf_pports, pp_next, pptmp) 130 pport_delete(pp); 131 TAILQ_FOREACH_SAFE(is, &conf->conf_isns, i_next, istmp) 132 isns_delete(is); 133 assert(TAILQ_EMPTY(&conf->conf_ports)); 134 free(conf->conf_pidfile_path); 135 free(conf); 136} 137 138static struct auth * 139auth_new(struct auth_group *ag) 140{ 141 struct auth *auth; 142 143 auth = calloc(1, sizeof(*auth)); 144 if (auth == NULL) 145 log_err(1, "calloc"); 146 auth->a_auth_group = ag; 147 TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next); 148 return (auth); 149} 150 151static void 152auth_delete(struct auth *auth) 153{ 154 TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next); 155 156 free(auth->a_user); 157 free(auth->a_secret); 158 free(auth->a_mutual_user); 159 free(auth->a_mutual_secret); 160 free(auth); 161} 162 163const struct auth * 164auth_find(const struct auth_group *ag, const char *user) 165{ 166 const struct auth *auth; 167 168 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) { 169 if (strcmp(auth->a_user, user) == 0) 170 return (auth); 171 } 172 173 return (NULL); 174} 175 176static void 177auth_check_secret_length(struct auth *auth) 178{ 179 size_t len; 180 181 len = strlen(auth->a_secret); 182 if (len > 16) { 183 if (auth->a_auth_group->ag_name != NULL) 184 log_warnx("secret for user \"%s\", auth-group \"%s\", " 185 "is too long; it should be at most 16 characters " 186 "long", auth->a_user, auth->a_auth_group->ag_name); 187 else 188 log_warnx("secret for user \"%s\", target \"%s\", " 189 "is too long; it should be at most 16 characters " 190 "long", auth->a_user, 191 auth->a_auth_group->ag_target->t_name); 192 } 193 if (len < 12) { 194 if (auth->a_auth_group->ag_name != NULL) 195 log_warnx("secret for user \"%s\", auth-group \"%s\", " 196 "is too short; it should be at least 12 characters " 197 "long", auth->a_user, 198 auth->a_auth_group->ag_name); 199 else 200 log_warnx("secret for user \"%s\", target \"%s\", " 201 "is too short; it should be at least 16 characters " 202 "long", auth->a_user, 203 auth->a_auth_group->ag_target->t_name); 204 } 205 206 if (auth->a_mutual_secret != NULL) { 207 len = strlen(auth->a_mutual_secret); 208 if (len > 16) { 209 if (auth->a_auth_group->ag_name != NULL) 210 log_warnx("mutual secret for user \"%s\", " 211 "auth-group \"%s\", is too long; it should " 212 "be at most 16 characters long", 213 auth->a_user, auth->a_auth_group->ag_name); 214 else 215 log_warnx("mutual secret for user \"%s\", " 216 "target \"%s\", is too long; it should " 217 "be at most 16 characters long", 218 auth->a_user, 219 auth->a_auth_group->ag_target->t_name); 220 } 221 if (len < 12) { 222 if (auth->a_auth_group->ag_name != NULL) 223 log_warnx("mutual secret for user \"%s\", " 224 "auth-group \"%s\", is too short; it " 225 "should be at least 12 characters long", 226 auth->a_user, auth->a_auth_group->ag_name); 227 else 228 log_warnx("mutual secret for user \"%s\", " 229 "target \"%s\", is too short; it should be " 230 "at least 16 characters long", 231 auth->a_user, 232 auth->a_auth_group->ag_target->t_name); 233 } 234 } 235} 236 237const struct auth * 238auth_new_chap(struct auth_group *ag, const char *user, 239 const char *secret) 240{ 241 struct auth *auth; 242 243 if (ag->ag_type == AG_TYPE_UNKNOWN) 244 ag->ag_type = AG_TYPE_CHAP; 245 if (ag->ag_type != AG_TYPE_CHAP) { 246 if (ag->ag_name != NULL) 247 log_warnx("cannot mix \"chap\" authentication with " 248 "other types for auth-group \"%s\"", ag->ag_name); 249 else 250 log_warnx("cannot mix \"chap\" authentication with " 251 "other types for target \"%s\"", 252 ag->ag_target->t_name); 253 return (NULL); 254 } 255 256 auth = auth_new(ag); 257 auth->a_user = checked_strdup(user); 258 auth->a_secret = checked_strdup(secret); 259 260 auth_check_secret_length(auth); 261 262 return (auth); 263} 264 265const struct auth * 266auth_new_chap_mutual(struct auth_group *ag, const char *user, 267 const char *secret, const char *user2, const char *secret2) 268{ 269 struct auth *auth; 270 271 if (ag->ag_type == AG_TYPE_UNKNOWN) 272 ag->ag_type = AG_TYPE_CHAP_MUTUAL; 273 if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) { 274 if (ag->ag_name != NULL) 275 log_warnx("cannot mix \"chap-mutual\" authentication " 276 "with other types for auth-group \"%s\"", 277 ag->ag_name); 278 else 279 log_warnx("cannot mix \"chap-mutual\" authentication " 280 "with other types for target \"%s\"", 281 ag->ag_target->t_name); 282 return (NULL); 283 } 284 285 auth = auth_new(ag); 286 auth->a_user = checked_strdup(user); 287 auth->a_secret = checked_strdup(secret); 288 auth->a_mutual_user = checked_strdup(user2); 289 auth->a_mutual_secret = checked_strdup(secret2); 290 291 auth_check_secret_length(auth); 292 293 return (auth); 294} 295 296const struct auth_name * 297auth_name_new(struct auth_group *ag, const char *name) 298{ 299 struct auth_name *an; 300 301 an = calloc(1, sizeof(*an)); 302 if (an == NULL) 303 log_err(1, "calloc"); 304 an->an_auth_group = ag; 305 an->an_initator_name = checked_strdup(name); 306 TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next); 307 return (an); 308} 309 310static void 311auth_name_delete(struct auth_name *an) 312{ 313 TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next); 314 315 free(an->an_initator_name); 316 free(an); 317} 318 319bool 320auth_name_defined(const struct auth_group *ag) 321{ 322 if (TAILQ_EMPTY(&ag->ag_names)) 323 return (false); 324 return (true); 325} 326 327const struct auth_name * 328auth_name_find(const struct auth_group *ag, const char *name) 329{ 330 const struct auth_name *auth_name; 331 332 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) { 333 if (strcmp(auth_name->an_initator_name, name) == 0) 334 return (auth_name); 335 } 336 337 return (NULL); 338} 339 340int 341auth_name_check(const struct auth_group *ag, const char *initiator_name) 342{ 343 if (!auth_name_defined(ag)) 344 return (0); 345 346 if (auth_name_find(ag, initiator_name) == NULL) 347 return (1); 348 349 return (0); 350} 351 352const struct auth_portal * 353auth_portal_new(struct auth_group *ag, const char *portal) 354{ 355 struct auth_portal *ap; 356 char *net, *mask, *str, *tmp; 357 int len, dm, m; 358 359 ap = calloc(1, sizeof(*ap)); 360 if (ap == NULL) 361 log_err(1, "calloc"); 362 ap->ap_auth_group = ag; 363 ap->ap_initator_portal = checked_strdup(portal); 364 mask = str = checked_strdup(portal); 365 net = strsep(&mask, "/"); 366 if (net[0] == '[') 367 net++; 368 len = strlen(net); 369 if (len == 0) 370 goto error; 371 if (net[len - 1] == ']') 372 net[len - 1] = 0; 373 if (strchr(net, ':') != NULL) { 374 struct sockaddr_in6 *sin6 = 375 (struct sockaddr_in6 *)&ap->ap_sa; 376 377 sin6->sin6_len = sizeof(*sin6); 378 sin6->sin6_family = AF_INET6; 379 if (inet_pton(AF_INET6, net, &sin6->sin6_addr) <= 0) 380 goto error; 381 dm = 128; 382 } else { 383 struct sockaddr_in *sin = 384 (struct sockaddr_in *)&ap->ap_sa; 385 386 sin->sin_len = sizeof(*sin); 387 sin->sin_family = AF_INET; 388 if (inet_pton(AF_INET, net, &sin->sin_addr) <= 0) 389 goto error; 390 dm = 32; 391 } 392 if (mask != NULL) { 393 m = strtol(mask, &tmp, 0); 394 if (m < 0 || m > dm || tmp[0] != 0) 395 goto error; 396 } else 397 m = dm; 398 ap->ap_mask = m; 399 free(str); 400 TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next); 401 return (ap); 402 403error: 404 free(ap); 405 log_warnx("incorrect initiator portal \"%s\"", portal); 406 return (NULL); 407} 408 409static void 410auth_portal_delete(struct auth_portal *ap) 411{ 412 TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next); 413 414 free(ap->ap_initator_portal); 415 free(ap); 416} 417 418bool 419auth_portal_defined(const struct auth_group *ag) 420{ 421 if (TAILQ_EMPTY(&ag->ag_portals)) 422 return (false); 423 return (true); 424} 425 426const struct auth_portal * 427auth_portal_find(const struct auth_group *ag, const struct sockaddr_storage *ss) 428{ 429 const struct auth_portal *ap; 430 const uint8_t *a, *b; 431 int i; 432 uint8_t bmask; 433 434 TAILQ_FOREACH(ap, &ag->ag_portals, ap_next) { 435 if (ap->ap_sa.ss_family != ss->ss_family) 436 continue; 437 if (ss->ss_family == AF_INET) { 438 a = (const uint8_t *) 439 &((const struct sockaddr_in *)ss)->sin_addr; 440 b = (const uint8_t *) 441 &((const struct sockaddr_in *)&ap->ap_sa)->sin_addr; 442 } else { 443 a = (const uint8_t *) 444 &((const struct sockaddr_in6 *)ss)->sin6_addr; 445 b = (const uint8_t *) 446 &((const struct sockaddr_in6 *)&ap->ap_sa)->sin6_addr; 447 } 448 for (i = 0; i < ap->ap_mask / 8; i++) { 449 if (a[i] != b[i]) 450 goto next; 451 } 452 if (ap->ap_mask % 8) { 453 bmask = 0xff << (8 - (ap->ap_mask % 8)); 454 if ((a[i] & bmask) != (b[i] & bmask)) 455 goto next; 456 } 457 return (ap); 458next: 459 ; 460 } 461 462 return (NULL); 463} 464 465int 466auth_portal_check(const struct auth_group *ag, const struct sockaddr_storage *sa) 467{ 468 469 if (!auth_portal_defined(ag)) 470 return (0); 471 472 if (auth_portal_find(ag, sa) == NULL) 473 return (1); 474 475 return (0); 476} 477 478struct auth_group * 479auth_group_new(struct conf *conf, const char *name) 480{ 481 struct auth_group *ag; 482 483 if (name != NULL) { 484 ag = auth_group_find(conf, name); 485 if (ag != NULL) { 486 log_warnx("duplicated auth-group \"%s\"", name); 487 return (NULL); 488 } 489 } 490 491 ag = calloc(1, sizeof(*ag)); 492 if (ag == NULL) 493 log_err(1, "calloc"); 494 if (name != NULL) 495 ag->ag_name = checked_strdup(name); 496 TAILQ_INIT(&ag->ag_auths); 497 TAILQ_INIT(&ag->ag_names); 498 TAILQ_INIT(&ag->ag_portals); 499 ag->ag_conf = conf; 500 TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next); 501 502 return (ag); 503} 504 505void 506auth_group_delete(struct auth_group *ag) 507{ 508 struct auth *auth, *auth_tmp; 509 struct auth_name *auth_name, *auth_name_tmp; 510 struct auth_portal *auth_portal, *auth_portal_tmp; 511 512 TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next); 513 514 TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp) 515 auth_delete(auth); 516 TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp) 517 auth_name_delete(auth_name); 518 TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next, 519 auth_portal_tmp) 520 auth_portal_delete(auth_portal); 521 free(ag->ag_name); 522 free(ag); 523} 524 525struct auth_group * 526auth_group_find(const struct conf *conf, const char *name) 527{ 528 struct auth_group *ag; 529 530 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 531 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0) 532 return (ag); 533 } 534 535 return (NULL); 536} 537 538int 539auth_group_set_type(struct auth_group *ag, const char *str) 540{ 541 int type; 542 543 if (strcmp(str, "none") == 0) { 544 type = AG_TYPE_NO_AUTHENTICATION; 545 } else if (strcmp(str, "deny") == 0) { 546 type = AG_TYPE_DENY; 547 } else if (strcmp(str, "chap") == 0) { 548 type = AG_TYPE_CHAP; 549 } else if (strcmp(str, "chap-mutual") == 0) { 550 type = AG_TYPE_CHAP_MUTUAL; 551 } else { 552 if (ag->ag_name != NULL) 553 log_warnx("invalid auth-type \"%s\" for auth-group " 554 "\"%s\"", str, ag->ag_name); 555 else 556 log_warnx("invalid auth-type \"%s\" for target " 557 "\"%s\"", str, ag->ag_target->t_name); 558 return (1); 559 } 560 561 if (ag->ag_type != AG_TYPE_UNKNOWN && ag->ag_type != type) { 562 if (ag->ag_name != NULL) { 563 log_warnx("cannot set auth-type to \"%s\" for " 564 "auth-group \"%s\"; already has a different " 565 "type", str, ag->ag_name); 566 } else { 567 log_warnx("cannot set auth-type to \"%s\" for target " 568 "\"%s\"; already has a different type", 569 str, ag->ag_target->t_name); 570 } 571 return (1); 572 } 573 574 ag->ag_type = type; 575 576 return (0); 577} 578 579static struct portal * 580portal_new(struct portal_group *pg) 581{ 582 struct portal *portal; 583 584 portal = calloc(1, sizeof(*portal)); 585 if (portal == NULL) 586 log_err(1, "calloc"); 587 TAILQ_INIT(&portal->p_targets); 588 portal->p_portal_group = pg; 589 TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next); 590 return (portal); 591} 592 593static void 594portal_delete(struct portal *portal) 595{ 596 597 TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next); 598 if (portal->p_ai != NULL) 599 freeaddrinfo(portal->p_ai); 600 free(portal->p_listen); 601 free(portal); 602} 603 604struct portal_group * 605portal_group_new(struct conf *conf, const char *name) 606{ 607 struct portal_group *pg; 608 609 pg = portal_group_find(conf, name); 610 if (pg != NULL) { 611 log_warnx("duplicated portal-group \"%s\"", name); 612 return (NULL); 613 } 614 615 pg = calloc(1, sizeof(*pg)); 616 if (pg == NULL) 617 log_err(1, "calloc"); 618 pg->pg_name = checked_strdup(name); 619 TAILQ_INIT(&pg->pg_options); 620 TAILQ_INIT(&pg->pg_portals); 621 TAILQ_INIT(&pg->pg_ports); 622 pg->pg_conf = conf; 623 pg->pg_tag = 0; /* Assigned later in conf_apply(). */ 624 TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next); 625 626 return (pg); 627} 628 629void 630portal_group_delete(struct portal_group *pg) 631{ 632 struct portal *portal, *tmp; 633 struct port *port, *tport; 634 struct option *o, *otmp; 635 636 TAILQ_FOREACH_SAFE(port, &pg->pg_ports, p_pgs, tport) 637 port_delete(port); 638 TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next); 639 640 TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp) 641 portal_delete(portal); 642 TAILQ_FOREACH_SAFE(o, &pg->pg_options, o_next, otmp) 643 option_delete(&pg->pg_options, o); 644 free(pg->pg_name); 645 free(pg->pg_offload); 646 free(pg->pg_redirection); 647 free(pg); 648} 649 650struct portal_group * 651portal_group_find(const struct conf *conf, const char *name) 652{ 653 struct portal_group *pg; 654 655 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 656 if (strcmp(pg->pg_name, name) == 0) 657 return (pg); 658 } 659 660 return (NULL); 661} 662 663static int 664parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai) 665{ 666 struct addrinfo hints; 667 char *str, *addr, *ch; 668 const char *port; 669 int error, colons = 0; 670 671 str = arg = strdup(arg); 672 if (arg[0] == '[') { 673 /* 674 * IPv6 address in square brackets, perhaps with port. 675 */ 676 arg++; 677 addr = strsep(&arg, "]"); 678 if (arg == NULL) 679 return (1); 680 if (arg[0] == '\0') { 681 port = def_port; 682 } else if (arg[0] == ':') { 683 port = arg + 1; 684 } else { 685 free(str); 686 return (1); 687 } 688 } else { 689 /* 690 * Either IPv6 address without brackets - and without 691 * a port - or IPv4 address. Just count the colons. 692 */ 693 for (ch = arg; *ch != '\0'; ch++) { 694 if (*ch == ':') 695 colons++; 696 } 697 if (colons > 1) { 698 addr = arg; 699 port = def_port; 700 } else { 701 addr = strsep(&arg, ":"); 702 if (arg == NULL) 703 port = def_port; 704 else 705 port = arg; 706 } 707 } 708 709 memset(&hints, 0, sizeof(hints)); 710 hints.ai_family = PF_UNSPEC; 711 hints.ai_socktype = SOCK_STREAM; 712 hints.ai_flags = AI_PASSIVE; 713 error = getaddrinfo(addr, port, &hints, ai); 714 free(str); 715 return ((error != 0) ? 1 : 0); 716} 717 718int 719portal_group_add_listen(struct portal_group *pg, const char *value, bool iser) 720{ 721 struct portal *portal; 722 723 portal = portal_new(pg); 724 portal->p_listen = checked_strdup(value); 725 portal->p_iser = iser; 726 727 if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) { 728 log_warnx("invalid listen address %s", portal->p_listen); 729 portal_delete(portal); 730 return (1); 731 } 732 733 /* 734 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 735 * those into multiple portals. 736 */ 737 738 return (0); 739} 740 741int 742isns_new(struct conf *conf, const char *addr) 743{ 744 struct isns *isns; 745 746 isns = calloc(1, sizeof(*isns)); 747 if (isns == NULL) 748 log_err(1, "calloc"); 749 isns->i_conf = conf; 750 TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next); 751 isns->i_addr = checked_strdup(addr); 752 753 if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) { 754 log_warnx("invalid iSNS address %s", isns->i_addr); 755 isns_delete(isns); 756 return (1); 757 } 758 759 /* 760 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 761 * those into multiple servers. 762 */ 763 764 return (0); 765} 766 767void 768isns_delete(struct isns *isns) 769{ 770 771 TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next); 772 free(isns->i_addr); 773 if (isns->i_ai != NULL) 774 freeaddrinfo(isns->i_ai); 775 free(isns); 776} 777 778static int 779isns_do_connect(struct isns *isns) 780{ 781 int s; 782 783 s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype, 784 isns->i_ai->ai_protocol); 785 if (s < 0) { 786 log_warn("socket(2) failed for %s", isns->i_addr); 787 return (-1); 788 } 789 if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) { 790 log_warn("connect(2) failed for %s", isns->i_addr); 791 close(s); 792 return (-1); 793 } 794 return(s); 795} 796 797static int 798isns_do_register(struct isns *isns, int s, const char *hostname) 799{ 800 struct conf *conf = isns->i_conf; 801 struct target *target; 802 struct portal *portal; 803 struct portal_group *pg; 804 struct port *port; 805 struct isns_req *req; 806 int res = 0; 807 uint32_t error; 808 809 req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT); 810 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 811 isns_req_add_delim(req); 812 isns_req_add_str(req, 1, hostname); 813 isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */ 814 isns_req_add_32(req, 6, conf->conf_isns_period); 815 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 816 if (pg->pg_unassigned) 817 continue; 818 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 819 isns_req_add_addr(req, 16, portal->p_ai); 820 isns_req_add_port(req, 17, portal->p_ai); 821 } 822 } 823 TAILQ_FOREACH(target, &conf->conf_targets, t_next) { 824 isns_req_add_str(req, 32, target->t_name); 825 isns_req_add_32(req, 33, 1); /* 1 -- Target*/ 826 if (target->t_alias != NULL) 827 isns_req_add_str(req, 34, target->t_alias); 828 TAILQ_FOREACH(port, &target->t_ports, p_ts) { 829 if ((pg = port->p_portal_group) == NULL) 830 continue; 831 isns_req_add_32(req, 51, pg->pg_tag); 832 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 833 isns_req_add_addr(req, 49, portal->p_ai); 834 isns_req_add_port(req, 50, portal->p_ai); 835 } 836 } 837 } 838 res = isns_req_send(s, req); 839 if (res < 0) { 840 log_warn("send(2) failed for %s", isns->i_addr); 841 goto quit; 842 } 843 res = isns_req_receive(s, req); 844 if (res < 0) { 845 log_warn("receive(2) failed for %s", isns->i_addr); 846 goto quit; 847 } 848 error = isns_req_get_status(req); 849 if (error != 0) { 850 log_warnx("iSNS register error %d for %s", error, isns->i_addr); 851 res = -1; 852 } 853quit: 854 isns_req_free(req); 855 return (res); 856} 857 858static int 859isns_do_check(struct isns *isns, int s, const char *hostname) 860{ 861 struct conf *conf = isns->i_conf; 862 struct isns_req *req; 863 int res = 0; 864 uint32_t error; 865 866 req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT); 867 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 868 isns_req_add_str(req, 1, hostname); 869 isns_req_add_delim(req); 870 isns_req_add(req, 2, 0, NULL); 871 res = isns_req_send(s, req); 872 if (res < 0) { 873 log_warn("send(2) failed for %s", isns->i_addr); 874 goto quit; 875 } 876 res = isns_req_receive(s, req); 877 if (res < 0) { 878 log_warn("receive(2) failed for %s", isns->i_addr); 879 goto quit; 880 } 881 error = isns_req_get_status(req); 882 if (error != 0) { 883 log_warnx("iSNS check error %d for %s", error, isns->i_addr); 884 res = -1; 885 } 886quit: 887 isns_req_free(req); 888 return (res); 889} 890 891static int 892isns_do_deregister(struct isns *isns, int s, const char *hostname) 893{ 894 struct conf *conf = isns->i_conf; 895 struct isns_req *req; 896 int res = 0; 897 uint32_t error; 898 899 req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT); 900 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 901 isns_req_add_delim(req); 902 isns_req_add_str(req, 1, hostname); 903 res = isns_req_send(s, req); 904 if (res < 0) { 905 log_warn("send(2) failed for %s", isns->i_addr); 906 goto quit; 907 } 908 res = isns_req_receive(s, req); 909 if (res < 0) { 910 log_warn("receive(2) failed for %s", isns->i_addr); 911 goto quit; 912 } 913 error = isns_req_get_status(req); 914 if (error != 0) { 915 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr); 916 res = -1; 917 } 918quit: 919 isns_req_free(req); 920 return (res); 921} 922 923void 924isns_register(struct isns *isns, struct isns *oldisns) 925{ 926 struct conf *conf = isns->i_conf; 927 int s; 928 char hostname[256]; 929 930 if (TAILQ_EMPTY(&conf->conf_targets) || 931 TAILQ_EMPTY(&conf->conf_portal_groups)) 932 return; 933 set_timeout(conf->conf_isns_timeout, false); 934 s = isns_do_connect(isns); 935 if (s < 0) { 936 set_timeout(0, false); 937 return; 938 } 939 gethostname(hostname, sizeof(hostname)); 940 941 if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets)) 942 oldisns = isns; 943 isns_do_deregister(oldisns, s, hostname); 944 isns_do_register(isns, s, hostname); 945 close(s); 946 set_timeout(0, false); 947} 948 949void 950isns_check(struct isns *isns) 951{ 952 struct conf *conf = isns->i_conf; 953 int s, res; 954 char hostname[256]; 955 956 if (TAILQ_EMPTY(&conf->conf_targets) || 957 TAILQ_EMPTY(&conf->conf_portal_groups)) 958 return; 959 set_timeout(conf->conf_isns_timeout, false); 960 s = isns_do_connect(isns); 961 if (s < 0) { 962 set_timeout(0, false); 963 return; 964 } 965 gethostname(hostname, sizeof(hostname)); 966 967 res = isns_do_check(isns, s, hostname); 968 if (res < 0) { 969 isns_do_deregister(isns, s, hostname); 970 isns_do_register(isns, s, hostname); 971 } 972 close(s); 973 set_timeout(0, false); 974} 975 976void 977isns_deregister(struct isns *isns) 978{ 979 struct conf *conf = isns->i_conf; 980 int s; 981 char hostname[256]; 982 983 if (TAILQ_EMPTY(&conf->conf_targets) || 984 TAILQ_EMPTY(&conf->conf_portal_groups)) 985 return; 986 set_timeout(conf->conf_isns_timeout, false); 987 s = isns_do_connect(isns); 988 if (s < 0) 989 return; 990 gethostname(hostname, sizeof(hostname)); 991 992 isns_do_deregister(isns, s, hostname); 993 close(s); 994 set_timeout(0, false); 995} 996 997int 998portal_group_set_filter(struct portal_group *pg, const char *str) 999{ 1000 int filter; 1001 1002 if (strcmp(str, "none") == 0) { 1003 filter = PG_FILTER_NONE; 1004 } else if (strcmp(str, "portal") == 0) { 1005 filter = PG_FILTER_PORTAL; 1006 } else if (strcmp(str, "portal-name") == 0) { 1007 filter = PG_FILTER_PORTAL_NAME; 1008 } else if (strcmp(str, "portal-name-auth") == 0) { 1009 filter = PG_FILTER_PORTAL_NAME_AUTH; 1010 } else { 1011 log_warnx("invalid discovery-filter \"%s\" for portal-group " 1012 "\"%s\"; valid values are \"none\", \"portal\", " 1013 "\"portal-name\", and \"portal-name-auth\"", 1014 str, pg->pg_name); 1015 return (1); 1016 } 1017 1018 if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN && 1019 pg->pg_discovery_filter != filter) { 1020 log_warnx("cannot set discovery-filter to \"%s\" for " 1021 "portal-group \"%s\"; already has a different " 1022 "value", str, pg->pg_name); 1023 return (1); 1024 } 1025 1026 pg->pg_discovery_filter = filter; 1027 1028 return (0); 1029} 1030 1031int 1032portal_group_set_offload(struct portal_group *pg, const char *offload) 1033{ 1034 1035 if (pg->pg_offload != NULL) { 1036 log_warnx("cannot set offload to \"%s\" for " 1037 "portal-group \"%s\"; already defined", 1038 offload, pg->pg_name); 1039 return (1); 1040 } 1041 1042 pg->pg_offload = checked_strdup(offload); 1043 1044 return (0); 1045} 1046 1047int 1048portal_group_set_redirection(struct portal_group *pg, const char *addr) 1049{ 1050 1051 if (pg->pg_redirection != NULL) { 1052 log_warnx("cannot set redirection to \"%s\" for " 1053 "portal-group \"%s\"; already defined", 1054 addr, pg->pg_name); 1055 return (1); 1056 } 1057 1058 pg->pg_redirection = checked_strdup(addr); 1059 1060 return (0); 1061} 1062 1063static bool 1064valid_hex(const char ch) 1065{ 1066 switch (ch) { 1067 case '0': 1068 case '1': 1069 case '2': 1070 case '3': 1071 case '4': 1072 case '5': 1073 case '6': 1074 case '7': 1075 case '8': 1076 case '9': 1077 case 'a': 1078 case 'A': 1079 case 'b': 1080 case 'B': 1081 case 'c': 1082 case 'C': 1083 case 'd': 1084 case 'D': 1085 case 'e': 1086 case 'E': 1087 case 'f': 1088 case 'F': 1089 return (true); 1090 default: 1091 return (false); 1092 } 1093} 1094 1095bool 1096valid_iscsi_name(const char *name) 1097{ 1098 int i; 1099 1100 if (strlen(name) >= MAX_NAME_LEN) { 1101 log_warnx("overlong name for target \"%s\"; max length allowed " 1102 "by iSCSI specification is %d characters", 1103 name, MAX_NAME_LEN); 1104 return (false); 1105 } 1106 1107 /* 1108 * In the cases below, we don't return an error, just in case the admin 1109 * was right, and we're wrong. 1110 */ 1111 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) { 1112 for (i = strlen("iqn."); name[i] != '\0'; i++) { 1113 /* 1114 * XXX: We should verify UTF-8 normalisation, as defined 1115 * by 3.2.6.2: iSCSI Name Encoding. 1116 */ 1117 if (isalnum(name[i])) 1118 continue; 1119 if (name[i] == '-' || name[i] == '.' || name[i] == ':') 1120 continue; 1121 log_warnx("invalid character \"%c\" in target name " 1122 "\"%s\"; allowed characters are letters, digits, " 1123 "'-', '.', and ':'", name[i], name); 1124 break; 1125 } 1126 /* 1127 * XXX: Check more stuff: valid date and a valid reversed domain. 1128 */ 1129 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) { 1130 if (strlen(name) != strlen("eui.") + 16) 1131 log_warnx("invalid target name \"%s\"; the \"eui.\" " 1132 "should be followed by exactly 16 hexadecimal " 1133 "digits", name); 1134 for (i = strlen("eui."); name[i] != '\0'; i++) { 1135 if (!valid_hex(name[i])) { 1136 log_warnx("invalid character \"%c\" in target " 1137 "name \"%s\"; allowed characters are 1-9 " 1138 "and A-F", name[i], name); 1139 break; 1140 } 1141 } 1142 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) { 1143 if (strlen(name) > strlen("naa.") + 32) 1144 log_warnx("invalid target name \"%s\"; the \"naa.\" " 1145 "should be followed by at most 32 hexadecimal " 1146 "digits", name); 1147 for (i = strlen("naa."); name[i] != '\0'; i++) { 1148 if (!valid_hex(name[i])) { 1149 log_warnx("invalid character \"%c\" in target " 1150 "name \"%s\"; allowed characters are 1-9 " 1151 "and A-F", name[i], name); 1152 break; 1153 } 1154 } 1155 } else { 1156 log_warnx("invalid target name \"%s\"; should start with " 1157 "either \"iqn.\", \"eui.\", or \"naa.\"", 1158 name); 1159 } 1160 return (true); 1161} 1162 1163struct pport * 1164pport_new(struct conf *conf, const char *name, uint32_t ctl_port) 1165{ 1166 struct pport *pp; 1167 1168 pp = calloc(1, sizeof(*pp)); 1169 if (pp == NULL) 1170 log_err(1, "calloc"); 1171 pp->pp_conf = conf; 1172 pp->pp_name = checked_strdup(name); 1173 pp->pp_ctl_port = ctl_port; 1174 TAILQ_INIT(&pp->pp_ports); 1175 TAILQ_INSERT_TAIL(&conf->conf_pports, pp, pp_next); 1176 return (pp); 1177} 1178 1179struct pport * 1180pport_find(const struct conf *conf, const char *name) 1181{ 1182 struct pport *pp; 1183 1184 TAILQ_FOREACH(pp, &conf->conf_pports, pp_next) { 1185 if (strcasecmp(pp->pp_name, name) == 0) 1186 return (pp); 1187 } 1188 return (NULL); 1189} 1190 1191struct pport * 1192pport_copy(struct pport *pp, struct conf *conf) 1193{ 1194 struct pport *ppnew; 1195 1196 ppnew = pport_new(conf, pp->pp_name, pp->pp_ctl_port); 1197 return (ppnew); 1198} 1199 1200void 1201pport_delete(struct pport *pp) 1202{ 1203 struct port *port, *tport; 1204 1205 TAILQ_FOREACH_SAFE(port, &pp->pp_ports, p_ts, tport) 1206 port_delete(port); 1207 TAILQ_REMOVE(&pp->pp_conf->conf_pports, pp, pp_next); 1208 free(pp->pp_name); 1209 free(pp); 1210} 1211 1212struct port * 1213port_new(struct conf *conf, struct target *target, struct portal_group *pg) 1214{ 1215 struct port *port; 1216 char *name; 1217 int ret; 1218 1219 ret = asprintf(&name, "%s-%s", pg->pg_name, target->t_name); 1220 if (ret <= 0) 1221 log_err(1, "asprintf"); 1222 if (port_find(conf, name) != NULL) { 1223 log_warnx("duplicate port \"%s\"", name); 1224 free(name); 1225 return (NULL); 1226 } 1227 port = calloc(1, sizeof(*port)); 1228 if (port == NULL) 1229 log_err(1, "calloc"); 1230 port->p_conf = conf; 1231 port->p_name = name; 1232 TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next); 1233 TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts); 1234 port->p_target = target; 1235 TAILQ_INSERT_TAIL(&pg->pg_ports, port, p_pgs); 1236 port->p_portal_group = pg; 1237 port->p_foreign = pg->pg_foreign; 1238 return (port); 1239} 1240 1241struct port * 1242port_new_pp(struct conf *conf, struct target *target, struct pport *pp) 1243{ 1244 struct port *port; 1245 char *name; 1246 int ret; 1247 1248 ret = asprintf(&name, "%s-%s", pp->pp_name, target->t_name); 1249 if (ret <= 0) 1250 log_err(1, "asprintf"); 1251 if (port_find(conf, name) != NULL) { 1252 log_warnx("duplicate port \"%s\"", name); 1253 free(name); 1254 return (NULL); 1255 } 1256 port = calloc(1, sizeof(*port)); 1257 if (port == NULL) 1258 log_err(1, "calloc"); 1259 port->p_conf = conf; 1260 port->p_name = name; 1261 TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next); 1262 TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts); 1263 port->p_target = target; 1264 TAILQ_INSERT_TAIL(&pp->pp_ports, port, p_pps); 1265 port->p_pport = pp; 1266 return (port); 1267} 1268 1269struct port * 1270port_find(const struct conf *conf, const char *name) 1271{ 1272 struct port *port; 1273 1274 TAILQ_FOREACH(port, &conf->conf_ports, p_next) { 1275 if (strcasecmp(port->p_name, name) == 0) 1276 return (port); 1277 } 1278 1279 return (NULL); 1280} 1281 1282struct port * 1283port_find_in_pg(const struct portal_group *pg, const char *target) 1284{ 1285 struct port *port; 1286 1287 TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) { 1288 if (strcasecmp(port->p_target->t_name, target) == 0) 1289 return (port); 1290 } 1291 1292 return (NULL); 1293} 1294 1295void 1296port_delete(struct port *port) 1297{ 1298 1299 if (port->p_portal_group) 1300 TAILQ_REMOVE(&port->p_portal_group->pg_ports, port, p_pgs); 1301 if (port->p_pport) 1302 TAILQ_REMOVE(&port->p_pport->pp_ports, port, p_pps); 1303 if (port->p_target) 1304 TAILQ_REMOVE(&port->p_target->t_ports, port, p_ts); 1305 TAILQ_REMOVE(&port->p_conf->conf_ports, port, p_next); 1306 free(port->p_name); 1307 free(port); 1308} 1309 1310struct target * 1311target_new(struct conf *conf, const char *name) 1312{ 1313 struct target *targ; 1314 int i, len; 1315 1316 targ = target_find(conf, name); 1317 if (targ != NULL) { 1318 log_warnx("duplicated target \"%s\"", name); 1319 return (NULL); 1320 } 1321 if (valid_iscsi_name(name) == false) { 1322 log_warnx("target name \"%s\" is invalid", name); 1323 return (NULL); 1324 } 1325 targ = calloc(1, sizeof(*targ)); 1326 if (targ == NULL) 1327 log_err(1, "calloc"); 1328 targ->t_name = checked_strdup(name); 1329 1330 /* 1331 * RFC 3722 requires us to normalize the name to lowercase. 1332 */ 1333 len = strlen(name); 1334 for (i = 0; i < len; i++) 1335 targ->t_name[i] = tolower(targ->t_name[i]); 1336 1337 targ->t_conf = conf; 1338 TAILQ_INIT(&targ->t_ports); 1339 TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next); 1340 1341 return (targ); 1342} 1343 1344void 1345target_delete(struct target *targ) 1346{ 1347 struct port *port, *tport; 1348 1349 TAILQ_FOREACH_SAFE(port, &targ->t_ports, p_ts, tport) 1350 port_delete(port); 1351 TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next); 1352 1353 free(targ->t_name); 1354 free(targ->t_redirection); 1355 free(targ); 1356} 1357 1358struct target * 1359target_find(struct conf *conf, const char *name) 1360{ 1361 struct target *targ; 1362 1363 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1364 if (strcasecmp(targ->t_name, name) == 0) 1365 return (targ); 1366 } 1367 1368 return (NULL); 1369} 1370 1371int 1372target_set_redirection(struct target *target, const char *addr) 1373{ 1374 1375 if (target->t_redirection != NULL) { 1376 log_warnx("cannot set redirection to \"%s\" for " 1377 "target \"%s\"; already defined", 1378 addr, target->t_name); 1379 return (1); 1380 } 1381 1382 target->t_redirection = checked_strdup(addr); 1383 1384 return (0); 1385} 1386 1387struct lun * 1388lun_new(struct conf *conf, const char *name) 1389{ 1390 struct lun *lun; 1391 1392 lun = lun_find(conf, name); 1393 if (lun != NULL) { 1394 log_warnx("duplicated lun \"%s\"", name); 1395 return (NULL); 1396 } 1397 1398 lun = calloc(1, sizeof(*lun)); 1399 if (lun == NULL) 1400 log_err(1, "calloc"); 1401 lun->l_conf = conf; 1402 lun->l_name = checked_strdup(name); 1403 TAILQ_INIT(&lun->l_options); 1404 TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next); 1405 lun->l_ctl_lun = -1; 1406 1407 return (lun); 1408} 1409 1410void 1411lun_delete(struct lun *lun) 1412{ 1413 struct target *targ; 1414 struct option *o, *tmp; 1415 int i; 1416 1417 TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) { 1418 for (i = 0; i < MAX_LUNS; i++) { 1419 if (targ->t_luns[i] == lun) 1420 targ->t_luns[i] = NULL; 1421 } 1422 } 1423 TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next); 1424 1425 TAILQ_FOREACH_SAFE(o, &lun->l_options, o_next, tmp) 1426 option_delete(&lun->l_options, o); 1427 free(lun->l_name); 1428 free(lun->l_backend); 1429 free(lun->l_device_id); 1430 free(lun->l_path); 1431 free(lun->l_scsiname); 1432 free(lun->l_serial); 1433 free(lun); 1434} 1435 1436struct lun * 1437lun_find(const struct conf *conf, const char *name) 1438{ 1439 struct lun *lun; 1440 1441 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1442 if (strcmp(lun->l_name, name) == 0) 1443 return (lun); 1444 } 1445 1446 return (NULL); 1447} 1448 1449void 1450lun_set_backend(struct lun *lun, const char *value) 1451{ 1452 free(lun->l_backend); 1453 lun->l_backend = checked_strdup(value); 1454} 1455 1456void 1457lun_set_blocksize(struct lun *lun, size_t value) 1458{ 1459 1460 lun->l_blocksize = value; 1461} 1462 1463void 1464lun_set_device_type(struct lun *lun, uint8_t value) 1465{ 1466 1467 lun->l_device_type = value; 1468} 1469 1470void 1471lun_set_device_id(struct lun *lun, const char *value) 1472{ 1473 free(lun->l_device_id); 1474 lun->l_device_id = checked_strdup(value); 1475} 1476 1477void 1478lun_set_path(struct lun *lun, const char *value) 1479{ 1480 free(lun->l_path); 1481 lun->l_path = checked_strdup(value); 1482} 1483 1484void 1485lun_set_scsiname(struct lun *lun, const char *value) 1486{ 1487 free(lun->l_scsiname); 1488 lun->l_scsiname = checked_strdup(value); 1489} 1490 1491void 1492lun_set_serial(struct lun *lun, const char *value) 1493{ 1494 free(lun->l_serial); 1495 lun->l_serial = checked_strdup(value); 1496} 1497 1498void 1499lun_set_size(struct lun *lun, size_t value) 1500{ 1501 1502 lun->l_size = value; 1503} 1504 1505void 1506lun_set_ctl_lun(struct lun *lun, uint32_t value) 1507{ 1508 1509 lun->l_ctl_lun = value; 1510} 1511 1512struct option * 1513option_new(struct options *options, const char *name, const char *value) 1514{ 1515 struct option *o; 1516 1517 o = option_find(options, name); 1518 if (o != NULL) { 1519 log_warnx("duplicated option \"%s\"", name); 1520 return (NULL); 1521 } 1522 1523 o = calloc(1, sizeof(*o)); 1524 if (o == NULL) 1525 log_err(1, "calloc"); 1526 o->o_name = checked_strdup(name); 1527 o->o_value = checked_strdup(value); 1528 TAILQ_INSERT_TAIL(options, o, o_next); 1529 1530 return (o); 1531} 1532 1533void 1534option_delete(struct options *options, struct option *o) 1535{ 1536 1537 TAILQ_REMOVE(options, o, o_next); 1538 free(o->o_name); 1539 free(o->o_value); 1540 free(o); 1541} 1542 1543struct option * 1544option_find(const struct options *options, const char *name) 1545{ 1546 struct option *o; 1547 1548 TAILQ_FOREACH(o, options, o_next) { 1549 if (strcmp(o->o_name, name) == 0) 1550 return (o); 1551 } 1552 1553 return (NULL); 1554} 1555 1556void 1557option_set(struct option *o, const char *value) 1558{ 1559 1560 free(o->o_value); 1561 o->o_value = checked_strdup(value); 1562} 1563 1564static struct connection * 1565connection_new(struct portal *portal, int fd, const char *host, 1566 const struct sockaddr *client_sa) 1567{ 1568 struct connection *conn; 1569 1570 conn = calloc(1, sizeof(*conn)); 1571 if (conn == NULL) 1572 log_err(1, "calloc"); 1573 conn->conn_portal = portal; 1574 conn->conn_socket = fd; 1575 conn->conn_initiator_addr = checked_strdup(host); 1576 memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len); 1577 1578 /* 1579 * Default values, from RFC 3720, section 12. 1580 */ 1581 conn->conn_max_data_segment_length = 8192; 1582 conn->conn_max_burst_length = 262144; 1583 conn->conn_immediate_data = true; 1584 1585 return (conn); 1586} 1587 1588#if 0 1589static void 1590conf_print(struct conf *conf) 1591{ 1592 struct auth_group *ag; 1593 struct auth *auth; 1594 struct auth_name *auth_name; 1595 struct auth_portal *auth_portal; 1596 struct portal_group *pg; 1597 struct portal *portal; 1598 struct target *targ; 1599 struct lun *lun; 1600 struct option *o; 1601 1602 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1603 fprintf(stderr, "auth-group %s {\n", ag->ag_name); 1604 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) 1605 fprintf(stderr, "\t chap-mutual %s %s %s %s\n", 1606 auth->a_user, auth->a_secret, 1607 auth->a_mutual_user, auth->a_mutual_secret); 1608 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) 1609 fprintf(stderr, "\t initiator-name %s\n", 1610 auth_name->an_initator_name); 1611 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next) 1612 fprintf(stderr, "\t initiator-portal %s\n", 1613 auth_portal->an_initator_portal); 1614 fprintf(stderr, "}\n"); 1615 } 1616 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1617 fprintf(stderr, "portal-group %s {\n", pg->pg_name); 1618 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 1619 fprintf(stderr, "\t listen %s\n", portal->p_listen); 1620 fprintf(stderr, "}\n"); 1621 } 1622 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1623 fprintf(stderr, "\tlun %s {\n", lun->l_name); 1624 fprintf(stderr, "\t\tpath %s\n", lun->l_path); 1625 TAILQ_FOREACH(o, &lun->l_options, o_next) 1626 fprintf(stderr, "\t\toption %s %s\n", 1627 lo->o_name, lo->o_value); 1628 fprintf(stderr, "\t}\n"); 1629 } 1630 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1631 fprintf(stderr, "target %s {\n", targ->t_name); 1632 if (targ->t_alias != NULL) 1633 fprintf(stderr, "\t alias %s\n", targ->t_alias); 1634 fprintf(stderr, "}\n"); 1635 } 1636} 1637#endif 1638 1639static int 1640conf_verify_lun(struct lun *lun) 1641{ 1642 const struct lun *lun2; 1643 1644 if (lun->l_backend == NULL) 1645 lun_set_backend(lun, "block"); 1646 if (strcmp(lun->l_backend, "block") == 0) { 1647 if (lun->l_path == NULL) { 1648 log_warnx("missing path for lun \"%s\"", 1649 lun->l_name); 1650 return (1); 1651 } 1652 } else if (strcmp(lun->l_backend, "ramdisk") == 0) { 1653 if (lun->l_size == 0) { 1654 log_warnx("missing size for ramdisk-backed lun \"%s\"", 1655 lun->l_name); 1656 return (1); 1657 } 1658 if (lun->l_path != NULL) { 1659 log_warnx("path must not be specified " 1660 "for ramdisk-backed lun \"%s\"", 1661 lun->l_name); 1662 return (1); 1663 } 1664 } 1665 if (lun->l_blocksize == 0) { 1666 if (lun->l_device_type == 5) 1667 lun_set_blocksize(lun, DEFAULT_CD_BLOCKSIZE); 1668 else 1669 lun_set_blocksize(lun, DEFAULT_BLOCKSIZE); 1670 } else if (lun->l_blocksize < 0) { 1671 log_warnx("invalid blocksize for lun \"%s\"; " 1672 "must be larger than 0", lun->l_name); 1673 return (1); 1674 } 1675 if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) { 1676 log_warnx("invalid size for lun \"%s\"; " 1677 "must be multiple of blocksize", lun->l_name); 1678 return (1); 1679 } 1680 TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) { 1681 if (lun == lun2) 1682 continue; 1683 if (lun->l_path != NULL && lun2->l_path != NULL && 1684 strcmp(lun->l_path, lun2->l_path) == 0) { 1685 log_debugx("WARNING: path \"%s\" duplicated " 1686 "between lun \"%s\", and " 1687 "lun \"%s\"", lun->l_path, 1688 lun->l_name, lun2->l_name); 1689 } 1690 } 1691 1692 return (0); 1693} 1694 1695int 1696conf_verify(struct conf *conf) 1697{ 1698 struct auth_group *ag; 1699 struct portal_group *pg; 1700 struct port *port; 1701 struct target *targ; 1702 struct lun *lun; 1703 bool found; 1704 int error, i; 1705 1706 if (conf->conf_pidfile_path == NULL) 1707 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE); 1708 1709 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1710 error = conf_verify_lun(lun); 1711 if (error != 0) 1712 return (error); 1713 } 1714 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1715 if (targ->t_auth_group == NULL) { 1716 targ->t_auth_group = auth_group_find(conf, 1717 "default"); 1718 assert(targ->t_auth_group != NULL); 1719 } 1720 if (TAILQ_EMPTY(&targ->t_ports)) { 1721 pg = portal_group_find(conf, "default"); 1722 assert(pg != NULL); 1723 port_new(conf, targ, pg); 1724 } 1725 found = false; 1726 for (i = 0; i < MAX_LUNS; i++) { 1727 if (targ->t_luns[i] != NULL) 1728 found = true; 1729 } 1730 if (!found && targ->t_redirection == NULL) { 1731 log_warnx("no LUNs defined for target \"%s\"", 1732 targ->t_name); 1733 } 1734 if (found && targ->t_redirection != NULL) { 1735 log_debugx("target \"%s\" contains luns, " 1736 " but configured for redirection", 1737 targ->t_name); 1738 } 1739 } 1740 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1741 assert(pg->pg_name != NULL); 1742 if (pg->pg_discovery_auth_group == NULL) { 1743 pg->pg_discovery_auth_group = 1744 auth_group_find(conf, "default"); 1745 assert(pg->pg_discovery_auth_group != NULL); 1746 } 1747 1748 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN) 1749 pg->pg_discovery_filter = PG_FILTER_NONE; 1750 1751 if (pg->pg_redirection != NULL) { 1752 if (!TAILQ_EMPTY(&pg->pg_ports)) { 1753 log_debugx("portal-group \"%s\" assigned " 1754 "to target, but configured " 1755 "for redirection", 1756 pg->pg_name); 1757 } 1758 pg->pg_unassigned = false; 1759 } else if (!TAILQ_EMPTY(&pg->pg_ports)) { 1760 pg->pg_unassigned = false; 1761 } else { 1762 if (strcmp(pg->pg_name, "default") != 0) 1763 log_warnx("portal-group \"%s\" not assigned " 1764 "to any target", pg->pg_name); 1765 pg->pg_unassigned = true; 1766 } 1767 } 1768 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1769 if (ag->ag_name == NULL) 1770 assert(ag->ag_target != NULL); 1771 else 1772 assert(ag->ag_target == NULL); 1773 1774 found = false; 1775 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1776 if (targ->t_auth_group == ag) { 1777 found = true; 1778 break; 1779 } 1780 } 1781 TAILQ_FOREACH(port, &conf->conf_ports, p_next) { 1782 if (port->p_auth_group == ag) { 1783 found = true; 1784 break; 1785 } 1786 } 1787 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1788 if (pg->pg_discovery_auth_group == ag) { 1789 found = true; 1790 break; 1791 } 1792 } 1793 if (!found && ag->ag_name != NULL && 1794 strcmp(ag->ag_name, "default") != 0 && 1795 strcmp(ag->ag_name, "no-authentication") != 0 && 1796 strcmp(ag->ag_name, "no-access") != 0) { 1797 log_warnx("auth-group \"%s\" not assigned " 1798 "to any target", ag->ag_name); 1799 } 1800 } 1801 1802 return (0); 1803} 1804 1805static int 1806conf_apply(struct conf *oldconf, struct conf *newconf) 1807{ 1808 struct lun *oldlun, *newlun, *tmplun; 1809 struct portal_group *oldpg, *newpg; 1810 struct portal *oldp, *newp; 1811 struct port *oldport, *newport, *tmpport; 1812 struct isns *oldns, *newns; 1813 pid_t otherpid; 1814 int changed, cumulated_error = 0, error, sockbuf; 1815 int one = 1; 1816 1817 if (oldconf->conf_debug != newconf->conf_debug) { 1818 log_debugx("changing debug level to %d", newconf->conf_debug); 1819 log_init(newconf->conf_debug); 1820 } 1821 1822 if (oldconf->conf_pidfh != NULL) { 1823 assert(oldconf->conf_pidfile_path != NULL); 1824 if (newconf->conf_pidfile_path != NULL && 1825 strcmp(oldconf->conf_pidfile_path, 1826 newconf->conf_pidfile_path) == 0) { 1827 newconf->conf_pidfh = oldconf->conf_pidfh; 1828 oldconf->conf_pidfh = NULL; 1829 } else { 1830 log_debugx("removing pidfile %s", 1831 oldconf->conf_pidfile_path); 1832 pidfile_remove(oldconf->conf_pidfh); 1833 oldconf->conf_pidfh = NULL; 1834 } 1835 } 1836 1837 if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) { 1838 log_debugx("opening pidfile %s", newconf->conf_pidfile_path); 1839 newconf->conf_pidfh = 1840 pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid); 1841 if (newconf->conf_pidfh == NULL) { 1842 if (errno == EEXIST) 1843 log_errx(1, "daemon already running, pid: %jd.", 1844 (intmax_t)otherpid); 1845 log_err(1, "cannot open or create pidfile \"%s\"", 1846 newconf->conf_pidfile_path); 1847 } 1848 } 1849 1850 /* 1851 * Go through the new portal groups, assigning tags or preserving old. 1852 */ 1853 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 1854 if (newpg->pg_tag != 0) 1855 continue; 1856 oldpg = portal_group_find(oldconf, newpg->pg_name); 1857 if (oldpg != NULL) 1858 newpg->pg_tag = oldpg->pg_tag; 1859 else 1860 newpg->pg_tag = ++last_portal_group_tag; 1861 } 1862 1863 /* Deregister on removed iSNS servers. */ 1864 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) { 1865 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) { 1866 if (strcmp(oldns->i_addr, newns->i_addr) == 0) 1867 break; 1868 } 1869 if (newns == NULL) 1870 isns_deregister(oldns); 1871 } 1872 1873 /* 1874 * XXX: If target or lun removal fails, we should somehow "move" 1875 * the old lun or target into newconf, so that subsequent 1876 * conf_apply() would try to remove them again. That would 1877 * be somewhat hairy, though, and lun deletion failures don't 1878 * really happen, so leave it as it is for now. 1879 */ 1880 /* 1881 * First, remove any ports present in the old configuration 1882 * and missing in the new one. 1883 */ 1884 TAILQ_FOREACH_SAFE(oldport, &oldconf->conf_ports, p_next, tmpport) { 1885 if (oldport->p_foreign) 1886 continue; 1887 newport = port_find(newconf, oldport->p_name); 1888 if (newport != NULL && !newport->p_foreign) 1889 continue; 1890 log_debugx("removing port \"%s\"", oldport->p_name); 1891 error = kernel_port_remove(oldport); 1892 if (error != 0) { 1893 log_warnx("failed to remove port %s", 1894 oldport->p_name); 1895 /* 1896 * XXX: Uncomment after fixing the root cause. 1897 * 1898 * cumulated_error++; 1899 */ 1900 } 1901 } 1902 1903 /* 1904 * Second, remove any LUNs present in the old configuration 1905 * and missing in the new one. 1906 */ 1907 TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) { 1908 newlun = lun_find(newconf, oldlun->l_name); 1909 if (newlun == NULL) { 1910 log_debugx("lun \"%s\", CTL lun %d " 1911 "not found in new configuration; " 1912 "removing", oldlun->l_name, oldlun->l_ctl_lun); 1913 error = kernel_lun_remove(oldlun); 1914 if (error != 0) { 1915 log_warnx("failed to remove lun \"%s\", " 1916 "CTL lun %d", 1917 oldlun->l_name, oldlun->l_ctl_lun); 1918 cumulated_error++; 1919 } 1920 continue; 1921 } 1922 1923 /* 1924 * Also remove the LUNs changed by more than size. 1925 */ 1926 changed = 0; 1927 assert(oldlun->l_backend != NULL); 1928 assert(newlun->l_backend != NULL); 1929 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) { 1930 log_debugx("backend for lun \"%s\", " 1931 "CTL lun %d changed; removing", 1932 oldlun->l_name, oldlun->l_ctl_lun); 1933 changed = 1; 1934 } 1935 if (oldlun->l_blocksize != newlun->l_blocksize) { 1936 log_debugx("blocksize for lun \"%s\", " 1937 "CTL lun %d changed; removing", 1938 oldlun->l_name, oldlun->l_ctl_lun); 1939 changed = 1; 1940 } 1941 if (newlun->l_device_id != NULL && 1942 (oldlun->l_device_id == NULL || 1943 strcmp(oldlun->l_device_id, newlun->l_device_id) != 1944 0)) { 1945 log_debugx("device-id for lun \"%s\", " 1946 "CTL lun %d changed; removing", 1947 oldlun->l_name, oldlun->l_ctl_lun); 1948 changed = 1; 1949 } 1950 if (newlun->l_path != NULL && 1951 (oldlun->l_path == NULL || 1952 strcmp(oldlun->l_path, newlun->l_path) != 0)) { 1953 log_debugx("path for lun \"%s\", " 1954 "CTL lun %d, changed; removing", 1955 oldlun->l_name, oldlun->l_ctl_lun); 1956 changed = 1; 1957 } 1958 if (newlun->l_serial != NULL && 1959 (oldlun->l_serial == NULL || 1960 strcmp(oldlun->l_serial, newlun->l_serial) != 0)) { 1961 log_debugx("serial for lun \"%s\", " 1962 "CTL lun %d changed; removing", 1963 oldlun->l_name, oldlun->l_ctl_lun); 1964 changed = 1; 1965 } 1966 if (changed) { 1967 error = kernel_lun_remove(oldlun); 1968 if (error != 0) { 1969 log_warnx("failed to remove lun \"%s\", " 1970 "CTL lun %d", 1971 oldlun->l_name, oldlun->l_ctl_lun); 1972 cumulated_error++; 1973 } 1974 lun_delete(oldlun); 1975 continue; 1976 } 1977 1978 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun); 1979 } 1980 1981 TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) { 1982 oldlun = lun_find(oldconf, newlun->l_name); 1983 if (oldlun != NULL) { 1984 log_debugx("modifying lun \"%s\", CTL lun %d", 1985 newlun->l_name, newlun->l_ctl_lun); 1986 error = kernel_lun_modify(newlun); 1987 if (error != 0) { 1988 log_warnx("failed to " 1989 "modify lun \"%s\", CTL lun %d", 1990 newlun->l_name, newlun->l_ctl_lun); 1991 cumulated_error++; 1992 } 1993 continue; 1994 } 1995 log_debugx("adding lun \"%s\"", newlun->l_name); 1996 error = kernel_lun_add(newlun); 1997 if (error != 0) { 1998 log_warnx("failed to add lun \"%s\"", newlun->l_name); 1999 lun_delete(newlun); 2000 cumulated_error++; 2001 } 2002 } 2003 2004 /* 2005 * Now add new ports or modify existing ones. 2006 */ 2007 TAILQ_FOREACH(newport, &newconf->conf_ports, p_next) { 2008 if (newport->p_foreign) 2009 continue; 2010 oldport = port_find(oldconf, newport->p_name); 2011 2012 if (oldport == NULL || oldport->p_foreign) { 2013 log_debugx("adding port \"%s\"", newport->p_name); 2014 error = kernel_port_add(newport); 2015 } else { 2016 log_debugx("updating port \"%s\"", newport->p_name); 2017 newport->p_ctl_port = oldport->p_ctl_port; 2018 error = kernel_port_update(newport, oldport); 2019 } 2020 if (error != 0) { 2021 log_warnx("failed to %s port %s", 2022 (oldport == NULL) ? "add" : "update", 2023 newport->p_name); 2024 /* 2025 * XXX: Uncomment after fixing the root cause. 2026 * 2027 * cumulated_error++; 2028 */ 2029 } 2030 } 2031 2032 /* 2033 * Go through the new portals, opening the sockets as necessary. 2034 */ 2035 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 2036 if (newpg->pg_foreign) 2037 continue; 2038 if (newpg->pg_unassigned) { 2039 log_debugx("not listening on portal-group \"%s\", " 2040 "not assigned to any target", 2041 newpg->pg_name); 2042 continue; 2043 } 2044 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) { 2045 /* 2046 * Try to find already open portal and reuse 2047 * the listening socket. We don't care about 2048 * what portal or portal group that was, what 2049 * matters is the listening address. 2050 */ 2051 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, 2052 pg_next) { 2053 TAILQ_FOREACH(oldp, &oldpg->pg_portals, 2054 p_next) { 2055 if (strcmp(newp->p_listen, 2056 oldp->p_listen) == 0 && 2057 oldp->p_socket > 0) { 2058 newp->p_socket = 2059 oldp->p_socket; 2060 oldp->p_socket = 0; 2061 break; 2062 } 2063 } 2064 } 2065 if (newp->p_socket > 0) { 2066 /* 2067 * We're done with this portal. 2068 */ 2069 continue; 2070 } 2071 2072#ifdef ICL_KERNEL_PROXY 2073 if (proxy_mode) { 2074 newpg->pg_conf->conf_portal_id++; 2075 newp->p_id = newpg->pg_conf->conf_portal_id; 2076 log_debugx("listening on %s, portal-group " 2077 "\"%s\", portal id %d, using ICL proxy", 2078 newp->p_listen, newpg->pg_name, newp->p_id); 2079 kernel_listen(newp->p_ai, newp->p_iser, 2080 newp->p_id); 2081 continue; 2082 } 2083#endif 2084 assert(proxy_mode == false); 2085 assert(newp->p_iser == false); 2086 2087 log_debugx("listening on %s, portal-group \"%s\"", 2088 newp->p_listen, newpg->pg_name); 2089 newp->p_socket = socket(newp->p_ai->ai_family, 2090 newp->p_ai->ai_socktype, 2091 newp->p_ai->ai_protocol); 2092 if (newp->p_socket < 0) { 2093 log_warn("socket(2) failed for %s", 2094 newp->p_listen); 2095 cumulated_error++; 2096 continue; 2097 } 2098 sockbuf = SOCKBUF_SIZE; 2099 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF, 2100 &sockbuf, sizeof(sockbuf)) == -1) 2101 log_warn("setsockopt(SO_RCVBUF) failed " 2102 "for %s", newp->p_listen); 2103 sockbuf = SOCKBUF_SIZE; 2104 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF, 2105 &sockbuf, sizeof(sockbuf)) == -1) 2106 log_warn("setsockopt(SO_SNDBUF) failed " 2107 "for %s", newp->p_listen); 2108 error = setsockopt(newp->p_socket, SOL_SOCKET, 2109 SO_REUSEADDR, &one, sizeof(one)); 2110 if (error != 0) { 2111 log_warn("setsockopt(SO_REUSEADDR) failed " 2112 "for %s", newp->p_listen); 2113 close(newp->p_socket); 2114 newp->p_socket = 0; 2115 cumulated_error++; 2116 continue; 2117 } 2118 error = bind(newp->p_socket, newp->p_ai->ai_addr, 2119 newp->p_ai->ai_addrlen); 2120 if (error != 0) { 2121 log_warn("bind(2) failed for %s", 2122 newp->p_listen); 2123 close(newp->p_socket); 2124 newp->p_socket = 0; 2125 cumulated_error++; 2126 continue; 2127 } 2128 error = listen(newp->p_socket, -1); 2129 if (error != 0) { 2130 log_warn("listen(2) failed for %s", 2131 newp->p_listen); 2132 close(newp->p_socket); 2133 newp->p_socket = 0; 2134 cumulated_error++; 2135 continue; 2136 } 2137 } 2138 } 2139 2140 /* 2141 * Go through the no longer used sockets, closing them. 2142 */ 2143 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) { 2144 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) { 2145 if (oldp->p_socket <= 0) 2146 continue; 2147 log_debugx("closing socket for %s, portal-group \"%s\"", 2148 oldp->p_listen, oldpg->pg_name); 2149 close(oldp->p_socket); 2150 oldp->p_socket = 0; 2151 } 2152 } 2153 2154 /* (Re-)Register on remaining/new iSNS servers. */ 2155 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) { 2156 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) { 2157 if (strcmp(oldns->i_addr, newns->i_addr) == 0) 2158 break; 2159 } 2160 isns_register(newns, oldns); 2161 } 2162 2163 /* Schedule iSNS update */ 2164 if (!TAILQ_EMPTY(&newconf->conf_isns)) 2165 set_timeout((newconf->conf_isns_period + 2) / 3, false); 2166 2167 return (cumulated_error); 2168} 2169 2170bool 2171timed_out(void) 2172{ 2173 2174 return (sigalrm_received); 2175} 2176 2177static void 2178sigalrm_handler_fatal(int dummy __unused) 2179{ 2180 /* 2181 * It would be easiest to just log an error and exit. We can't 2182 * do this, though, because log_errx() is not signal safe, since 2183 * it calls syslog(3). Instead, set a flag checked by pdu_send() 2184 * and pdu_receive(), to call log_errx() there. Should they fail 2185 * to notice, we'll exit here one second later. 2186 */ 2187 if (sigalrm_received) { 2188 /* 2189 * Oh well. Just give up and quit. 2190 */ 2191 _exit(2); 2192 } 2193 2194 sigalrm_received = true; 2195} 2196 2197static void 2198sigalrm_handler(int dummy __unused) 2199{ 2200 2201 sigalrm_received = true; 2202} 2203 2204void 2205set_timeout(int timeout, int fatal) 2206{ 2207 struct sigaction sa; 2208 struct itimerval itv; 2209 int error; 2210 2211 if (timeout <= 0) { 2212 log_debugx("session timeout disabled"); 2213 bzero(&itv, sizeof(itv)); 2214 error = setitimer(ITIMER_REAL, &itv, NULL); 2215 if (error != 0) 2216 log_err(1, "setitimer"); 2217 sigalrm_received = false; 2218 return; 2219 } 2220 2221 sigalrm_received = false; 2222 bzero(&sa, sizeof(sa)); 2223 if (fatal) 2224 sa.sa_handler = sigalrm_handler_fatal; 2225 else 2226 sa.sa_handler = sigalrm_handler; 2227 sigfillset(&sa.sa_mask); 2228 error = sigaction(SIGALRM, &sa, NULL); 2229 if (error != 0) 2230 log_err(1, "sigaction"); 2231 2232 /* 2233 * First SIGALRM will arive after conf_timeout seconds. 2234 * If we do nothing, another one will arrive a second later. 2235 */ 2236 log_debugx("setting session timeout to %d seconds", timeout); 2237 bzero(&itv, sizeof(itv)); 2238 itv.it_interval.tv_sec = 1; 2239 itv.it_value.tv_sec = timeout; 2240 error = setitimer(ITIMER_REAL, &itv, NULL); 2241 if (error != 0) 2242 log_err(1, "setitimer"); 2243} 2244 2245static int 2246wait_for_children(bool block) 2247{ 2248 pid_t pid; 2249 int status; 2250 int num = 0; 2251 2252 for (;;) { 2253 /* 2254 * If "block" is true, wait for at least one process. 2255 */ 2256 if (block && num == 0) 2257 pid = wait4(-1, &status, 0, NULL); 2258 else 2259 pid = wait4(-1, &status, WNOHANG, NULL); 2260 if (pid <= 0) 2261 break; 2262 if (WIFSIGNALED(status)) { 2263 log_warnx("child process %d terminated with signal %d", 2264 pid, WTERMSIG(status)); 2265 } else if (WEXITSTATUS(status) != 0) { 2266 log_warnx("child process %d terminated with exit status %d", 2267 pid, WEXITSTATUS(status)); 2268 } else { 2269 log_debugx("child process %d terminated gracefully", pid); 2270 } 2271 num++; 2272 } 2273 2274 return (num); 2275} 2276 2277static void 2278handle_connection(struct portal *portal, int fd, 2279 const struct sockaddr *client_sa, bool dont_fork) 2280{ 2281 struct connection *conn; 2282 int error; 2283 pid_t pid; 2284 char host[NI_MAXHOST + 1]; 2285 struct conf *conf; 2286 2287 conf = portal->p_portal_group->pg_conf; 2288 2289 if (dont_fork) { 2290 log_debugx("incoming connection; not forking due to -d flag"); 2291 } else { 2292 nchildren -= wait_for_children(false); 2293 assert(nchildren >= 0); 2294 2295 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) { 2296 log_debugx("maxproc limit of %d child processes hit; " 2297 "waiting for child process to exit", conf->conf_maxproc); 2298 nchildren -= wait_for_children(true); 2299 assert(nchildren >= 0); 2300 } 2301 log_debugx("incoming connection; forking child process #%d", 2302 nchildren); 2303 nchildren++; 2304 pid = fork(); 2305 if (pid < 0) 2306 log_err(1, "fork"); 2307 if (pid > 0) { 2308 close(fd); 2309 return; 2310 } 2311 } 2312 pidfile_close(conf->conf_pidfh); 2313 2314 error = getnameinfo(client_sa, client_sa->sa_len, 2315 host, sizeof(host), NULL, 0, NI_NUMERICHOST); 2316 if (error != 0) 2317 log_errx(1, "getnameinfo: %s", gai_strerror(error)); 2318 2319 log_debugx("accepted connection from %s; portal group \"%s\"", 2320 host, portal->p_portal_group->pg_name); 2321 log_set_peer_addr(host); 2322 setproctitle("%s", host); 2323 2324 conn = connection_new(portal, fd, host, client_sa); 2325 set_timeout(conf->conf_timeout, true); 2326 kernel_capsicate(); 2327 login(conn); 2328 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) { 2329 kernel_handoff(conn); 2330 log_debugx("connection handed off to the kernel"); 2331 } else { 2332 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY); 2333 discovery(conn); 2334 } 2335 log_debugx("nothing more to do; exiting"); 2336 exit(0); 2337} 2338 2339static int 2340fd_add(int fd, fd_set *fdset, int nfds) 2341{ 2342 2343 /* 2344 * Skip sockets which we failed to bind. 2345 */ 2346 if (fd <= 0) 2347 return (nfds); 2348 2349 FD_SET(fd, fdset); 2350 if (fd > nfds) 2351 nfds = fd; 2352 return (nfds); 2353} 2354 2355static void 2356main_loop(struct conf *conf, bool dont_fork) 2357{ 2358 struct portal_group *pg; 2359 struct portal *portal; 2360 struct sockaddr_storage client_sa; 2361 socklen_t client_salen; 2362#ifdef ICL_KERNEL_PROXY 2363 int connection_id; 2364 int portal_id; 2365#endif 2366 fd_set fdset; 2367 int error, nfds, client_fd; 2368 2369 pidfile_write(conf->conf_pidfh); 2370 2371 for (;;) { 2372 if (sighup_received || sigterm_received || timed_out()) 2373 return; 2374 2375#ifdef ICL_KERNEL_PROXY 2376 if (proxy_mode) { 2377 client_salen = sizeof(client_sa); 2378 kernel_accept(&connection_id, &portal_id, 2379 (struct sockaddr *)&client_sa, &client_salen); 2380 assert(client_salen >= client_sa.ss_len); 2381 2382 log_debugx("incoming connection, id %d, portal id %d", 2383 connection_id, portal_id); 2384 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2385 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 2386 if (portal->p_id == portal_id) { 2387 goto found; 2388 } 2389 } 2390 } 2391 2392 log_errx(1, "kernel returned invalid portal_id %d", 2393 portal_id); 2394 2395found: 2396 handle_connection(portal, connection_id, 2397 (struct sockaddr *)&client_sa, dont_fork); 2398 } else { 2399#endif 2400 assert(proxy_mode == false); 2401 2402 FD_ZERO(&fdset); 2403 nfds = 0; 2404 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2405 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 2406 nfds = fd_add(portal->p_socket, &fdset, nfds); 2407 } 2408 error = select(nfds + 1, &fdset, NULL, NULL, NULL); 2409 if (error <= 0) { 2410 if (errno == EINTR) 2411 return; 2412 log_err(1, "select"); 2413 } 2414 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2415 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 2416 if (!FD_ISSET(portal->p_socket, &fdset)) 2417 continue; 2418 client_salen = sizeof(client_sa); 2419 client_fd = accept(portal->p_socket, 2420 (struct sockaddr *)&client_sa, 2421 &client_salen); 2422 if (client_fd < 0) { 2423 if (errno == ECONNABORTED) 2424 continue; 2425 log_err(1, "accept"); 2426 } 2427 assert(client_salen >= client_sa.ss_len); 2428 2429 handle_connection(portal, client_fd, 2430 (struct sockaddr *)&client_sa, 2431 dont_fork); 2432 break; 2433 } 2434 } 2435#ifdef ICL_KERNEL_PROXY 2436 } 2437#endif 2438 } 2439} 2440 2441static void 2442sighup_handler(int dummy __unused) 2443{ 2444 2445 sighup_received = true; 2446} 2447 2448static void 2449sigterm_handler(int dummy __unused) 2450{ 2451 2452 sigterm_received = true; 2453} 2454 2455static void 2456sigchld_handler(int dummy __unused) 2457{ 2458 2459 /* 2460 * The only purpose of this handler is to make SIGCHLD 2461 * interrupt the ISCSIDWAIT ioctl(2), so we can call 2462 * wait_for_children(). 2463 */ 2464} 2465 2466static void 2467register_signals(void) 2468{ 2469 struct sigaction sa; 2470 int error; 2471 2472 bzero(&sa, sizeof(sa)); 2473 sa.sa_handler = sighup_handler; 2474 sigfillset(&sa.sa_mask); 2475 error = sigaction(SIGHUP, &sa, NULL); 2476 if (error != 0) 2477 log_err(1, "sigaction"); 2478 2479 sa.sa_handler = sigterm_handler; 2480 error = sigaction(SIGTERM, &sa, NULL); 2481 if (error != 0) 2482 log_err(1, "sigaction"); 2483 2484 sa.sa_handler = sigterm_handler; 2485 error = sigaction(SIGINT, &sa, NULL); 2486 if (error != 0) 2487 log_err(1, "sigaction"); 2488 2489 sa.sa_handler = sigchld_handler; 2490 error = sigaction(SIGCHLD, &sa, NULL); 2491 if (error != 0) 2492 log_err(1, "sigaction"); 2493} 2494 2495static void 2496check_perms(const char *path) 2497{ 2498 struct stat sb; 2499 int error; 2500 2501 error = stat(path, &sb); 2502 if (error != 0) { 2503 log_warn("stat"); 2504 return; 2505 } 2506 if (sb.st_mode & S_IWOTH) { 2507 log_warnx("%s is world-writable", path); 2508 } else if (sb.st_mode & S_IROTH) { 2509 log_warnx("%s is world-readable", path); 2510 } else if (sb.st_mode & S_IXOTH) { 2511 /* 2512 * Ok, this one doesn't matter, but still do it, 2513 * just for consistency. 2514 */ 2515 log_warnx("%s is world-executable", path); 2516 } 2517 2518 /* 2519 * XXX: Should we also check for owner != 0? 2520 */ 2521} 2522 2523static struct conf * 2524conf_new_from_file(const char *path, struct conf *oldconf, bool ucl) 2525{ 2526 struct conf *conf; 2527 struct auth_group *ag; 2528 struct portal_group *pg; 2529 struct pport *pp; 2530 int error; 2531 2532 log_debugx("obtaining configuration from %s", path); 2533 2534 conf = conf_new(); 2535 2536 TAILQ_FOREACH(pp, &oldconf->conf_pports, pp_next) 2537 pport_copy(pp, conf); 2538 2539 ag = auth_group_new(conf, "default"); 2540 assert(ag != NULL); 2541 2542 ag = auth_group_new(conf, "no-authentication"); 2543 assert(ag != NULL); 2544 ag->ag_type = AG_TYPE_NO_AUTHENTICATION; 2545 2546 ag = auth_group_new(conf, "no-access"); 2547 assert(ag != NULL); 2548 ag->ag_type = AG_TYPE_DENY; 2549 2550 pg = portal_group_new(conf, "default"); 2551 assert(pg != NULL); 2552 2553 if (ucl) 2554 error = uclparse_conf(conf, path); 2555 else 2556 error = parse_conf(conf, path); 2557 2558 if (error != 0) { 2559 conf_delete(conf); 2560 return (NULL); 2561 } 2562 2563 check_perms(path); 2564 2565 if (conf->conf_default_ag_defined == false) { 2566 log_debugx("auth-group \"default\" not defined; " 2567 "going with defaults"); 2568 ag = auth_group_find(conf, "default"); 2569 assert(ag != NULL); 2570 ag->ag_type = AG_TYPE_DENY; 2571 } 2572 2573 if (conf->conf_default_pg_defined == false) { 2574 log_debugx("portal-group \"default\" not defined; " 2575 "going with defaults"); 2576 pg = portal_group_find(conf, "default"); 2577 assert(pg != NULL); 2578 portal_group_add_listen(pg, "0.0.0.0:3260", false); 2579 portal_group_add_listen(pg, "[::]:3260", false); 2580 } 2581 2582 conf->conf_kernel_port_on = true; 2583 2584 error = conf_verify(conf); 2585 if (error != 0) { 2586 conf_delete(conf); 2587 return (NULL); 2588 } 2589 2590 return (conf); 2591} 2592 2593int 2594main(int argc, char **argv) 2595{ 2596 struct conf *oldconf, *newconf, *tmpconf; 2597 struct isns *newns; 2598 const char *config_path = DEFAULT_CONFIG_PATH; 2599 int debug = 0, ch, error; 2600 bool dont_daemonize = false; 2601 bool use_ucl = false; 2602 2603 while ((ch = getopt(argc, argv, "duf:R")) != -1) { 2604 switch (ch) { 2605 case 'd': 2606 dont_daemonize = true; 2607 debug++; 2608 break; 2609 case 'u': 2610 use_ucl = true; 2611 break; 2612 case 'f': 2613 config_path = optarg; 2614 break; 2615 case 'R': 2616#ifndef ICL_KERNEL_PROXY 2617 log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY " 2618 "does not support iSER protocol"); 2619#endif 2620 proxy_mode = true; 2621 break; 2622 case '?': 2623 default: 2624 usage(); 2625 } 2626 } 2627 argc -= optind; 2628 if (argc != 0) 2629 usage(); 2630 2631 log_init(debug); 2632 kernel_init(); 2633 2634 oldconf = conf_new_from_kernel(); 2635 newconf = conf_new_from_file(config_path, oldconf, use_ucl); 2636 2637 if (newconf == NULL) 2638 log_errx(1, "configuration error; exiting"); 2639 if (debug > 0) { 2640 oldconf->conf_debug = debug; 2641 newconf->conf_debug = debug; 2642 } 2643 2644 error = conf_apply(oldconf, newconf); 2645 if (error != 0) 2646 log_errx(1, "failed to apply configuration; exiting"); 2647 2648 conf_delete(oldconf); 2649 oldconf = NULL; 2650 2651 register_signals(); 2652 2653 if (dont_daemonize == false) { 2654 log_debugx("daemonizing"); 2655 if (daemon(0, 0) == -1) { 2656 log_warn("cannot daemonize"); 2657 pidfile_remove(newconf->conf_pidfh); 2658 exit(1); 2659 } 2660 } 2661 2662 /* Schedule iSNS update */ 2663 if (!TAILQ_EMPTY(&newconf->conf_isns)) 2664 set_timeout((newconf->conf_isns_period + 2) / 3, false); 2665 2666 for (;;) { 2667 main_loop(newconf, dont_daemonize); 2668 if (sighup_received) { 2669 sighup_received = false; 2670 log_debugx("received SIGHUP, reloading configuration"); 2671 tmpconf = conf_new_from_file(config_path, newconf, 2672 use_ucl); 2673 2674 if (tmpconf == NULL) { 2675 log_warnx("configuration error, " 2676 "continuing with old configuration"); 2677 } else { 2678 if (debug > 0) 2679 tmpconf->conf_debug = debug; 2680 oldconf = newconf; 2681 newconf = tmpconf; 2682 error = conf_apply(oldconf, newconf); 2683 if (error != 0) 2684 log_warnx("failed to reload " 2685 "configuration"); 2686 conf_delete(oldconf); 2687 oldconf = NULL; 2688 } 2689 } else if (sigterm_received) { 2690 log_debugx("exiting on signal; " 2691 "reloading empty configuration"); 2692 2693 log_debugx("removing CTL iSCSI ports " 2694 "and terminating all connections"); 2695 2696 oldconf = newconf; 2697 newconf = conf_new(); 2698 if (debug > 0) 2699 newconf->conf_debug = debug; 2700 error = conf_apply(oldconf, newconf); 2701 if (error != 0) 2702 log_warnx("failed to apply configuration"); 2703 conf_delete(oldconf); 2704 oldconf = NULL; 2705 2706 log_warnx("exiting on signal"); 2707 exit(0); 2708 } else { 2709 nchildren -= wait_for_children(false); 2710 assert(nchildren >= 0); 2711 if (timed_out()) { 2712 set_timeout(0, false); 2713 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) 2714 isns_check(newns); 2715 /* Schedule iSNS update */ 2716 if (!TAILQ_EMPTY(&newconf->conf_isns)) { 2717 set_timeout((newconf->conf_isns_period 2718 + 2) / 3, 2719 false); 2720 } 2721 } 2722 } 2723 } 2724 /* NOTREACHED */ 2725} 2726