ctld.c revision 309870
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD: stable/10/usr.sbin/ctld/ctld.c 309870 2016-12-12 02:22:49Z delphij $"); 33 34#include <sys/types.h> 35#include <sys/time.h> 36#include <sys/socket.h> 37#include <sys/wait.h> 38#include <netinet/in.h> 39#include <arpa/inet.h> 40#include <assert.h> 41#include <ctype.h> 42#include <errno.h> 43#include <netdb.h> 44#include <signal.h> 45#include <stdbool.h> 46#include <stdio.h> 47#include <stdint.h> 48#include <stdlib.h> 49#include <string.h> 50#include <unistd.h> 51 52#include "ctld.h" 53#include "isns.h" 54 55bool proxy_mode = false; 56 57static volatile bool sighup_received = false; 58static volatile bool sigterm_received = false; 59static volatile bool sigalrm_received = false; 60 61static int nchildren = 0; 62static uint16_t last_portal_group_tag = 0xff; 63 64static void 65usage(void) 66{ 67 68 fprintf(stderr, "usage: ctld [-d][-f config-file]\n"); 69 exit(1); 70} 71 72char * 73checked_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 83struct conf * 84conf_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 108void 109conf_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 137static struct auth * 138auth_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 150static void 151auth_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 162const struct auth * 163auth_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 175static void 176auth_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 12 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 12 characters long", 230 auth->a_user, 231 auth->a_auth_group->ag_target->t_name); 232 } 233 } 234} 235 236const struct auth * 237auth_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 264const struct auth * 265auth_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 295const struct auth_name * 296auth_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 309static void 310auth_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 318bool 319auth_name_defined(const struct auth_group *ag) 320{ 321 if (TAILQ_EMPTY(&ag->ag_names)) 322 return (false); 323 return (true); 324} 325 326const struct auth_name * 327auth_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 339int 340auth_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 351const struct auth_portal * 352auth_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 402error: 403 free(str); 404 free(ap); 405 log_errx(1, "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_redirection); 646 free(pg); 647} 648 649struct portal_group * 650portal_group_find(const struct conf *conf, const char *name) 651{ 652 struct portal_group *pg; 653 654 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 655 if (strcmp(pg->pg_name, name) == 0) 656 return (pg); 657 } 658 659 return (NULL); 660} 661 662static int 663parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai) 664{ 665 struct addrinfo hints; 666 char *str, *addr, *ch; 667 const char *port; 668 int error, colons = 0; 669 670 str = arg = strdup(arg); 671 if (arg[0] == '[') { 672 /* 673 * IPv6 address in square brackets, perhaps with port. 674 */ 675 arg++; 676 addr = strsep(&arg, "]"); 677 if (arg == NULL) { 678 free(str); 679 return (1); 680 } 681 if (arg[0] == '\0') { 682 port = def_port; 683 } else if (arg[0] == ':') { 684 port = arg + 1; 685 } else { 686 free(str); 687 return (1); 688 } 689 } else { 690 /* 691 * Either IPv6 address without brackets - and without 692 * a port - or IPv4 address. Just count the colons. 693 */ 694 for (ch = arg; *ch != '\0'; ch++) { 695 if (*ch == ':') 696 colons++; 697 } 698 if (colons > 1) { 699 addr = arg; 700 port = def_port; 701 } else { 702 addr = strsep(&arg, ":"); 703 if (arg == NULL) 704 port = def_port; 705 else 706 port = arg; 707 } 708 } 709 710 memset(&hints, 0, sizeof(hints)); 711 hints.ai_family = PF_UNSPEC; 712 hints.ai_socktype = SOCK_STREAM; 713 hints.ai_flags = AI_PASSIVE; 714 error = getaddrinfo(addr, port, &hints, ai); 715 free(str); 716 return ((error != 0) ? 1 : 0); 717} 718 719int 720portal_group_add_listen(struct portal_group *pg, const char *value, bool iser) 721{ 722 struct portal *portal; 723 724 portal = portal_new(pg); 725 portal->p_listen = checked_strdup(value); 726 portal->p_iser = iser; 727 728 if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) { 729 log_warnx("invalid listen address %s", portal->p_listen); 730 portal_delete(portal); 731 return (1); 732 } 733 734 /* 735 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 736 * those into multiple portals. 737 */ 738 739 return (0); 740} 741 742int 743isns_new(struct conf *conf, const char *addr) 744{ 745 struct isns *isns; 746 747 isns = calloc(1, sizeof(*isns)); 748 if (isns == NULL) 749 log_err(1, "calloc"); 750 isns->i_conf = conf; 751 TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next); 752 isns->i_addr = checked_strdup(addr); 753 754 if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) { 755 log_warnx("invalid iSNS address %s", isns->i_addr); 756 isns_delete(isns); 757 return (1); 758 } 759 760 /* 761 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 762 * those into multiple servers. 763 */ 764 765 return (0); 766} 767 768void 769isns_delete(struct isns *isns) 770{ 771 772 TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next); 773 free(isns->i_addr); 774 if (isns->i_ai != NULL) 775 freeaddrinfo(isns->i_ai); 776 free(isns); 777} 778 779static int 780isns_do_connect(struct isns *isns) 781{ 782 int s; 783 784 s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype, 785 isns->i_ai->ai_protocol); 786 if (s < 0) { 787 log_warn("socket(2) failed for %s", isns->i_addr); 788 return (-1); 789 } 790 if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) { 791 log_warn("connect(2) failed for %s", isns->i_addr); 792 close(s); 793 return (-1); 794 } 795 return(s); 796} 797 798static int 799isns_do_register(struct isns *isns, int s, const char *hostname) 800{ 801 struct conf *conf = isns->i_conf; 802 struct target *target; 803 struct portal *portal; 804 struct portal_group *pg; 805 struct port *port; 806 struct isns_req *req; 807 int res = 0; 808 uint32_t error; 809 810 req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT); 811 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 812 isns_req_add_delim(req); 813 isns_req_add_str(req, 1, hostname); 814 isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */ 815 isns_req_add_32(req, 6, conf->conf_isns_period); 816 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 817 if (pg->pg_unassigned) 818 continue; 819 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 820 isns_req_add_addr(req, 16, portal->p_ai); 821 isns_req_add_port(req, 17, portal->p_ai); 822 } 823 } 824 TAILQ_FOREACH(target, &conf->conf_targets, t_next) { 825 isns_req_add_str(req, 32, target->t_name); 826 isns_req_add_32(req, 33, 1); /* 1 -- Target*/ 827 if (target->t_alias != NULL) 828 isns_req_add_str(req, 34, target->t_alias); 829 TAILQ_FOREACH(port, &target->t_ports, p_ts) { 830 if ((pg = port->p_portal_group) == NULL) 831 continue; 832 isns_req_add_32(req, 51, pg->pg_tag); 833 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 834 isns_req_add_addr(req, 49, portal->p_ai); 835 isns_req_add_port(req, 50, portal->p_ai); 836 } 837 } 838 } 839 res = isns_req_send(s, req); 840 if (res < 0) { 841 log_warn("send(2) failed for %s", isns->i_addr); 842 goto quit; 843 } 844 res = isns_req_receive(s, req); 845 if (res < 0) { 846 log_warn("receive(2) failed for %s", isns->i_addr); 847 goto quit; 848 } 849 error = isns_req_get_status(req); 850 if (error != 0) { 851 log_warnx("iSNS register error %d for %s", error, isns->i_addr); 852 res = -1; 853 } 854quit: 855 isns_req_free(req); 856 return (res); 857} 858 859static int 860isns_do_check(struct isns *isns, int s, const char *hostname) 861{ 862 struct conf *conf = isns->i_conf; 863 struct isns_req *req; 864 int res = 0; 865 uint32_t error; 866 867 req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT); 868 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 869 isns_req_add_str(req, 1, hostname); 870 isns_req_add_delim(req); 871 isns_req_add(req, 2, 0, NULL); 872 res = isns_req_send(s, req); 873 if (res < 0) { 874 log_warn("send(2) failed for %s", isns->i_addr); 875 goto quit; 876 } 877 res = isns_req_receive(s, req); 878 if (res < 0) { 879 log_warn("receive(2) failed for %s", isns->i_addr); 880 goto quit; 881 } 882 error = isns_req_get_status(req); 883 if (error != 0) { 884 log_warnx("iSNS check error %d for %s", error, isns->i_addr); 885 res = -1; 886 } 887quit: 888 isns_req_free(req); 889 return (res); 890} 891 892static int 893isns_do_deregister(struct isns *isns, int s, const char *hostname) 894{ 895 struct conf *conf = isns->i_conf; 896 struct isns_req *req; 897 int res = 0; 898 uint32_t error; 899 900 req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT); 901 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 902 isns_req_add_delim(req); 903 isns_req_add_str(req, 1, hostname); 904 res = isns_req_send(s, req); 905 if (res < 0) { 906 log_warn("send(2) failed for %s", isns->i_addr); 907 goto quit; 908 } 909 res = isns_req_receive(s, req); 910 if (res < 0) { 911 log_warn("receive(2) failed for %s", isns->i_addr); 912 goto quit; 913 } 914 error = isns_req_get_status(req); 915 if (error != 0) { 916 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr); 917 res = -1; 918 } 919quit: 920 isns_req_free(req); 921 return (res); 922} 923 924void 925isns_register(struct isns *isns, struct isns *oldisns) 926{ 927 struct conf *conf = isns->i_conf; 928 int s; 929 char hostname[256]; 930 931 if (TAILQ_EMPTY(&conf->conf_targets) || 932 TAILQ_EMPTY(&conf->conf_portal_groups)) 933 return; 934 set_timeout(conf->conf_isns_timeout, false); 935 s = isns_do_connect(isns); 936 if (s < 0) { 937 set_timeout(0, false); 938 return; 939 } 940 gethostname(hostname, sizeof(hostname)); 941 942 if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets)) 943 oldisns = isns; 944 isns_do_deregister(oldisns, s, hostname); 945 isns_do_register(isns, s, hostname); 946 close(s); 947 set_timeout(0, false); 948} 949 950void 951isns_check(struct isns *isns) 952{ 953 struct conf *conf = isns->i_conf; 954 int s, res; 955 char hostname[256]; 956 957 if (TAILQ_EMPTY(&conf->conf_targets) || 958 TAILQ_EMPTY(&conf->conf_portal_groups)) 959 return; 960 set_timeout(conf->conf_isns_timeout, false); 961 s = isns_do_connect(isns); 962 if (s < 0) { 963 set_timeout(0, false); 964 return; 965 } 966 gethostname(hostname, sizeof(hostname)); 967 968 res = isns_do_check(isns, s, hostname); 969 if (res < 0) { 970 isns_do_deregister(isns, s, hostname); 971 isns_do_register(isns, s, hostname); 972 } 973 close(s); 974 set_timeout(0, false); 975} 976 977void 978isns_deregister(struct isns *isns) 979{ 980 struct conf *conf = isns->i_conf; 981 int s; 982 char hostname[256]; 983 984 if (TAILQ_EMPTY(&conf->conf_targets) || 985 TAILQ_EMPTY(&conf->conf_portal_groups)) 986 return; 987 set_timeout(conf->conf_isns_timeout, false); 988 s = isns_do_connect(isns); 989 if (s < 0) 990 return; 991 gethostname(hostname, sizeof(hostname)); 992 993 isns_do_deregister(isns, s, hostname); 994 close(s); 995 set_timeout(0, false); 996} 997 998int 999portal_group_set_filter(struct portal_group *pg, const char *str) 1000{ 1001 int filter; 1002 1003 if (strcmp(str, "none") == 0) { 1004 filter = PG_FILTER_NONE; 1005 } else if (strcmp(str, "portal") == 0) { 1006 filter = PG_FILTER_PORTAL; 1007 } else if (strcmp(str, "portal-name") == 0) { 1008 filter = PG_FILTER_PORTAL_NAME; 1009 } else if (strcmp(str, "portal-name-auth") == 0) { 1010 filter = PG_FILTER_PORTAL_NAME_AUTH; 1011 } else { 1012 log_warnx("invalid discovery-filter \"%s\" for portal-group " 1013 "\"%s\"; valid values are \"none\", \"portal\", " 1014 "\"portal-name\", and \"portal-name-auth\"", 1015 str, pg->pg_name); 1016 return (1); 1017 } 1018 1019 if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN && 1020 pg->pg_discovery_filter != filter) { 1021 log_warnx("cannot set discovery-filter to \"%s\" for " 1022 "portal-group \"%s\"; already has a different " 1023 "value", str, pg->pg_name); 1024 return (1); 1025 } 1026 1027 pg->pg_discovery_filter = filter; 1028 1029 return (0); 1030} 1031 1032int 1033portal_group_set_redirection(struct portal_group *pg, const char *addr) 1034{ 1035 1036 if (pg->pg_redirection != NULL) { 1037 log_warnx("cannot set redirection to \"%s\" for " 1038 "portal-group \"%s\"; already defined", 1039 addr, pg->pg_name); 1040 return (1); 1041 } 1042 1043 pg->pg_redirection = checked_strdup(addr); 1044 1045 return (0); 1046} 1047 1048static bool 1049valid_hex(const char ch) 1050{ 1051 switch (ch) { 1052 case '0': 1053 case '1': 1054 case '2': 1055 case '3': 1056 case '4': 1057 case '5': 1058 case '6': 1059 case '7': 1060 case '8': 1061 case '9': 1062 case 'a': 1063 case 'A': 1064 case 'b': 1065 case 'B': 1066 case 'c': 1067 case 'C': 1068 case 'd': 1069 case 'D': 1070 case 'e': 1071 case 'E': 1072 case 'f': 1073 case 'F': 1074 return (true); 1075 default: 1076 return (false); 1077 } 1078} 1079 1080bool 1081valid_iscsi_name(const char *name) 1082{ 1083 int i; 1084 1085 if (strlen(name) >= MAX_NAME_LEN) { 1086 log_warnx("overlong name for target \"%s\"; max length allowed " 1087 "by iSCSI specification is %d characters", 1088 name, MAX_NAME_LEN); 1089 return (false); 1090 } 1091 1092 /* 1093 * In the cases below, we don't return an error, just in case the admin 1094 * was right, and we're wrong. 1095 */ 1096 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) { 1097 for (i = strlen("iqn."); name[i] != '\0'; i++) { 1098 /* 1099 * XXX: We should verify UTF-8 normalisation, as defined 1100 * by 3.2.6.2: iSCSI Name Encoding. 1101 */ 1102 if (isalnum(name[i])) 1103 continue; 1104 if (name[i] == '-' || name[i] == '.' || name[i] == ':') 1105 continue; 1106 log_warnx("invalid character \"%c\" in target name " 1107 "\"%s\"; allowed characters are letters, digits, " 1108 "'-', '.', and ':'", name[i], name); 1109 break; 1110 } 1111 /* 1112 * XXX: Check more stuff: valid date and a valid reversed domain. 1113 */ 1114 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) { 1115 if (strlen(name) != strlen("eui.") + 16) 1116 log_warnx("invalid target name \"%s\"; the \"eui.\" " 1117 "should be followed by exactly 16 hexadecimal " 1118 "digits", name); 1119 for (i = strlen("eui."); name[i] != '\0'; i++) { 1120 if (!valid_hex(name[i])) { 1121 log_warnx("invalid character \"%c\" in target " 1122 "name \"%s\"; allowed characters are 1-9 " 1123 "and A-F", name[i], name); 1124 break; 1125 } 1126 } 1127 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) { 1128 if (strlen(name) > strlen("naa.") + 32) 1129 log_warnx("invalid target name \"%s\"; the \"naa.\" " 1130 "should be followed by at most 32 hexadecimal " 1131 "digits", name); 1132 for (i = strlen("naa."); name[i] != '\0'; i++) { 1133 if (!valid_hex(name[i])) { 1134 log_warnx("invalid character \"%c\" in target " 1135 "name \"%s\"; allowed characters are 1-9 " 1136 "and A-F", name[i], name); 1137 break; 1138 } 1139 } 1140 } else { 1141 log_warnx("invalid target name \"%s\"; should start with " 1142 "either \"iqn.\", \"eui.\", or \"naa.\"", 1143 name); 1144 } 1145 return (true); 1146} 1147 1148struct pport * 1149pport_new(struct conf *conf, const char *name, uint32_t ctl_port) 1150{ 1151 struct pport *pp; 1152 1153 pp = calloc(1, sizeof(*pp)); 1154 if (pp == NULL) 1155 log_err(1, "calloc"); 1156 pp->pp_conf = conf; 1157 pp->pp_name = checked_strdup(name); 1158 pp->pp_ctl_port = ctl_port; 1159 TAILQ_INIT(&pp->pp_ports); 1160 TAILQ_INSERT_TAIL(&conf->conf_pports, pp, pp_next); 1161 return (pp); 1162} 1163 1164struct pport * 1165pport_find(const struct conf *conf, const char *name) 1166{ 1167 struct pport *pp; 1168 1169 TAILQ_FOREACH(pp, &conf->conf_pports, pp_next) { 1170 if (strcasecmp(pp->pp_name, name) == 0) 1171 return (pp); 1172 } 1173 return (NULL); 1174} 1175 1176struct pport * 1177pport_copy(struct pport *pp, struct conf *conf) 1178{ 1179 struct pport *ppnew; 1180 1181 ppnew = pport_new(conf, pp->pp_name, pp->pp_ctl_port); 1182 return (ppnew); 1183} 1184 1185void 1186pport_delete(struct pport *pp) 1187{ 1188 struct port *port, *tport; 1189 1190 TAILQ_FOREACH_SAFE(port, &pp->pp_ports, p_ts, tport) 1191 port_delete(port); 1192 TAILQ_REMOVE(&pp->pp_conf->conf_pports, pp, pp_next); 1193 free(pp->pp_name); 1194 free(pp); 1195} 1196 1197struct port * 1198port_new(struct conf *conf, struct target *target, struct portal_group *pg) 1199{ 1200 struct port *port; 1201 char *name; 1202 int ret; 1203 1204 ret = asprintf(&name, "%s-%s", pg->pg_name, target->t_name); 1205 if (ret <= 0) 1206 log_err(1, "asprintf"); 1207 if (port_find(conf, name) != NULL) { 1208 log_warnx("duplicate port \"%s\"", name); 1209 free(name); 1210 return (NULL); 1211 } 1212 port = calloc(1, sizeof(*port)); 1213 if (port == NULL) 1214 log_err(1, "calloc"); 1215 port->p_conf = conf; 1216 port->p_name = name; 1217 TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next); 1218 TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts); 1219 port->p_target = target; 1220 TAILQ_INSERT_TAIL(&pg->pg_ports, port, p_pgs); 1221 port->p_portal_group = pg; 1222 port->p_foreign = pg->pg_foreign; 1223 return (port); 1224} 1225 1226struct port * 1227port_new_pp(struct conf *conf, struct target *target, struct pport *pp) 1228{ 1229 struct port *port; 1230 char *name; 1231 int ret; 1232 1233 ret = asprintf(&name, "%s-%s", pp->pp_name, target->t_name); 1234 if (ret <= 0) 1235 log_err(1, "asprintf"); 1236 if (port_find(conf, name) != NULL) { 1237 log_warnx("duplicate port \"%s\"", name); 1238 free(name); 1239 return (NULL); 1240 } 1241 port = calloc(1, sizeof(*port)); 1242 if (port == NULL) 1243 log_err(1, "calloc"); 1244 port->p_conf = conf; 1245 port->p_name = name; 1246 TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next); 1247 TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts); 1248 port->p_target = target; 1249 TAILQ_INSERT_TAIL(&pp->pp_ports, port, p_pps); 1250 port->p_pport = pp; 1251 return (port); 1252} 1253 1254struct port * 1255port_find(const struct conf *conf, const char *name) 1256{ 1257 struct port *port; 1258 1259 TAILQ_FOREACH(port, &conf->conf_ports, p_next) { 1260 if (strcasecmp(port->p_name, name) == 0) 1261 return (port); 1262 } 1263 1264 return (NULL); 1265} 1266 1267struct port * 1268port_find_in_pg(const struct portal_group *pg, const char *target) 1269{ 1270 struct port *port; 1271 1272 TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) { 1273 if (strcasecmp(port->p_target->t_name, target) == 0) 1274 return (port); 1275 } 1276 1277 return (NULL); 1278} 1279 1280void 1281port_delete(struct port *port) 1282{ 1283 1284 if (port->p_portal_group) 1285 TAILQ_REMOVE(&port->p_portal_group->pg_ports, port, p_pgs); 1286 if (port->p_pport) 1287 TAILQ_REMOVE(&port->p_pport->pp_ports, port, p_pps); 1288 if (port->p_target) 1289 TAILQ_REMOVE(&port->p_target->t_ports, port, p_ts); 1290 TAILQ_REMOVE(&port->p_conf->conf_ports, port, p_next); 1291 free(port->p_name); 1292 free(port); 1293} 1294 1295struct target * 1296target_new(struct conf *conf, const char *name) 1297{ 1298 struct target *targ; 1299 int i, len; 1300 1301 targ = target_find(conf, name); 1302 if (targ != NULL) { 1303 log_warnx("duplicated target \"%s\"", name); 1304 return (NULL); 1305 } 1306 if (valid_iscsi_name(name) == false) { 1307 log_warnx("target name \"%s\" is invalid", name); 1308 return (NULL); 1309 } 1310 targ = calloc(1, sizeof(*targ)); 1311 if (targ == NULL) 1312 log_err(1, "calloc"); 1313 targ->t_name = checked_strdup(name); 1314 1315 /* 1316 * RFC 3722 requires us to normalize the name to lowercase. 1317 */ 1318 len = strlen(name); 1319 for (i = 0; i < len; i++) 1320 targ->t_name[i] = tolower(targ->t_name[i]); 1321 1322 targ->t_conf = conf; 1323 TAILQ_INIT(&targ->t_ports); 1324 TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next); 1325 1326 return (targ); 1327} 1328 1329void 1330target_delete(struct target *targ) 1331{ 1332 struct port *port, *tport; 1333 1334 TAILQ_FOREACH_SAFE(port, &targ->t_ports, p_ts, tport) 1335 port_delete(port); 1336 TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next); 1337 1338 free(targ->t_name); 1339 free(targ->t_redirection); 1340 free(targ); 1341} 1342 1343struct target * 1344target_find(struct conf *conf, const char *name) 1345{ 1346 struct target *targ; 1347 1348 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1349 if (strcasecmp(targ->t_name, name) == 0) 1350 return (targ); 1351 } 1352 1353 return (NULL); 1354} 1355 1356int 1357target_set_redirection(struct target *target, const char *addr) 1358{ 1359 1360 if (target->t_redirection != NULL) { 1361 log_warnx("cannot set redirection to \"%s\" for " 1362 "target \"%s\"; already defined", 1363 addr, target->t_name); 1364 return (1); 1365 } 1366 1367 target->t_redirection = checked_strdup(addr); 1368 1369 return (0); 1370} 1371 1372struct lun * 1373lun_new(struct conf *conf, const char *name) 1374{ 1375 struct lun *lun; 1376 1377 lun = lun_find(conf, name); 1378 if (lun != NULL) { 1379 log_warnx("duplicated lun \"%s\"", name); 1380 return (NULL); 1381 } 1382 1383 lun = calloc(1, sizeof(*lun)); 1384 if (lun == NULL) 1385 log_err(1, "calloc"); 1386 lun->l_conf = conf; 1387 lun->l_name = checked_strdup(name); 1388 TAILQ_INIT(&lun->l_options); 1389 TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next); 1390 lun->l_ctl_lun = -1; 1391 1392 return (lun); 1393} 1394 1395void 1396lun_delete(struct lun *lun) 1397{ 1398 struct target *targ; 1399 struct option *o, *tmp; 1400 int i; 1401 1402 TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) { 1403 for (i = 0; i < MAX_LUNS; i++) { 1404 if (targ->t_luns[i] == lun) 1405 targ->t_luns[i] = NULL; 1406 } 1407 } 1408 TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next); 1409 1410 TAILQ_FOREACH_SAFE(o, &lun->l_options, o_next, tmp) 1411 option_delete(&lun->l_options, o); 1412 free(lun->l_name); 1413 free(lun->l_backend); 1414 free(lun->l_device_id); 1415 free(lun->l_path); 1416 free(lun->l_scsiname); 1417 free(lun->l_serial); 1418 free(lun); 1419} 1420 1421struct lun * 1422lun_find(const struct conf *conf, const char *name) 1423{ 1424 struct lun *lun; 1425 1426 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1427 if (strcmp(lun->l_name, name) == 0) 1428 return (lun); 1429 } 1430 1431 return (NULL); 1432} 1433 1434void 1435lun_set_backend(struct lun *lun, const char *value) 1436{ 1437 free(lun->l_backend); 1438 lun->l_backend = checked_strdup(value); 1439} 1440 1441void 1442lun_set_blocksize(struct lun *lun, size_t value) 1443{ 1444 1445 lun->l_blocksize = value; 1446} 1447 1448void 1449lun_set_device_type(struct lun *lun, uint8_t value) 1450{ 1451 1452 lun->l_device_type = value; 1453} 1454 1455void 1456lun_set_device_id(struct lun *lun, const char *value) 1457{ 1458 free(lun->l_device_id); 1459 lun->l_device_id = checked_strdup(value); 1460} 1461 1462void 1463lun_set_path(struct lun *lun, const char *value) 1464{ 1465 free(lun->l_path); 1466 lun->l_path = checked_strdup(value); 1467} 1468 1469void 1470lun_set_scsiname(struct lun *lun, const char *value) 1471{ 1472 free(lun->l_scsiname); 1473 lun->l_scsiname = checked_strdup(value); 1474} 1475 1476void 1477lun_set_serial(struct lun *lun, const char *value) 1478{ 1479 free(lun->l_serial); 1480 lun->l_serial = checked_strdup(value); 1481} 1482 1483void 1484lun_set_size(struct lun *lun, size_t value) 1485{ 1486 1487 lun->l_size = value; 1488} 1489 1490void 1491lun_set_ctl_lun(struct lun *lun, uint32_t value) 1492{ 1493 1494 lun->l_ctl_lun = value; 1495} 1496 1497struct option * 1498option_new(struct options *options, const char *name, const char *value) 1499{ 1500 struct option *o; 1501 1502 o = option_find(options, name); 1503 if (o != NULL) { 1504 log_warnx("duplicated option \"%s\"", name); 1505 return (NULL); 1506 } 1507 1508 o = calloc(1, sizeof(*o)); 1509 if (o == NULL) 1510 log_err(1, "calloc"); 1511 o->o_name = checked_strdup(name); 1512 o->o_value = checked_strdup(value); 1513 TAILQ_INSERT_TAIL(options, o, o_next); 1514 1515 return (o); 1516} 1517 1518void 1519option_delete(struct options *options, struct option *o) 1520{ 1521 1522 TAILQ_REMOVE(options, o, o_next); 1523 free(o->o_name); 1524 free(o->o_value); 1525 free(o); 1526} 1527 1528struct option * 1529option_find(const struct options *options, const char *name) 1530{ 1531 struct option *o; 1532 1533 TAILQ_FOREACH(o, options, o_next) { 1534 if (strcmp(o->o_name, name) == 0) 1535 return (o); 1536 } 1537 1538 return (NULL); 1539} 1540 1541void 1542option_set(struct option *o, const char *value) 1543{ 1544 1545 free(o->o_value); 1546 o->o_value = checked_strdup(value); 1547} 1548 1549static struct connection * 1550connection_new(struct portal *portal, int fd, const char *host, 1551 const struct sockaddr *client_sa) 1552{ 1553 struct connection *conn; 1554 1555 conn = calloc(1, sizeof(*conn)); 1556 if (conn == NULL) 1557 log_err(1, "calloc"); 1558 conn->conn_portal = portal; 1559 conn->conn_socket = fd; 1560 conn->conn_initiator_addr = checked_strdup(host); 1561 memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len); 1562 1563 /* 1564 * Default values, from RFC 3720, section 12. 1565 */ 1566 conn->conn_max_data_segment_length = 8192; 1567 conn->conn_max_burst_length = 262144; 1568 conn->conn_immediate_data = true; 1569 1570 return (conn); 1571} 1572 1573#if 0 1574static void 1575conf_print(struct conf *conf) 1576{ 1577 struct auth_group *ag; 1578 struct auth *auth; 1579 struct auth_name *auth_name; 1580 struct auth_portal *auth_portal; 1581 struct portal_group *pg; 1582 struct portal *portal; 1583 struct target *targ; 1584 struct lun *lun; 1585 struct option *o; 1586 1587 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1588 fprintf(stderr, "auth-group %s {\n", ag->ag_name); 1589 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) 1590 fprintf(stderr, "\t chap-mutual %s %s %s %s\n", 1591 auth->a_user, auth->a_secret, 1592 auth->a_mutual_user, auth->a_mutual_secret); 1593 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) 1594 fprintf(stderr, "\t initiator-name %s\n", 1595 auth_name->an_initator_name); 1596 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next) 1597 fprintf(stderr, "\t initiator-portal %s\n", 1598 auth_portal->an_initator_portal); 1599 fprintf(stderr, "}\n"); 1600 } 1601 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1602 fprintf(stderr, "portal-group %s {\n", pg->pg_name); 1603 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 1604 fprintf(stderr, "\t listen %s\n", portal->p_listen); 1605 fprintf(stderr, "}\n"); 1606 } 1607 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1608 fprintf(stderr, "\tlun %s {\n", lun->l_name); 1609 fprintf(stderr, "\t\tpath %s\n", lun->l_path); 1610 TAILQ_FOREACH(o, &lun->l_options, o_next) 1611 fprintf(stderr, "\t\toption %s %s\n", 1612 lo->o_name, lo->o_value); 1613 fprintf(stderr, "\t}\n"); 1614 } 1615 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1616 fprintf(stderr, "target %s {\n", targ->t_name); 1617 if (targ->t_alias != NULL) 1618 fprintf(stderr, "\t alias %s\n", targ->t_alias); 1619 fprintf(stderr, "}\n"); 1620 } 1621} 1622#endif 1623 1624static int 1625conf_verify_lun(struct lun *lun) 1626{ 1627 const struct lun *lun2; 1628 1629 if (lun->l_backend == NULL) 1630 lun_set_backend(lun, "block"); 1631 if (strcmp(lun->l_backend, "block") == 0) { 1632 if (lun->l_path == NULL) { 1633 log_warnx("missing path for lun \"%s\"", 1634 lun->l_name); 1635 return (1); 1636 } 1637 } else if (strcmp(lun->l_backend, "ramdisk") == 0) { 1638 if (lun->l_size == 0) { 1639 log_warnx("missing size for ramdisk-backed lun \"%s\"", 1640 lun->l_name); 1641 return (1); 1642 } 1643 if (lun->l_path != NULL) { 1644 log_warnx("path must not be specified " 1645 "for ramdisk-backed lun \"%s\"", 1646 lun->l_name); 1647 return (1); 1648 } 1649 } 1650 if (lun->l_blocksize == 0) { 1651 if (lun->l_device_type == 5) 1652 lun_set_blocksize(lun, DEFAULT_CD_BLOCKSIZE); 1653 else 1654 lun_set_blocksize(lun, DEFAULT_BLOCKSIZE); 1655 } else if (lun->l_blocksize < 0) { 1656 log_warnx("invalid blocksize for lun \"%s\"; " 1657 "must be larger than 0", lun->l_name); 1658 return (1); 1659 } 1660 if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) { 1661 log_warnx("invalid size for lun \"%s\"; " 1662 "must be multiple of blocksize", lun->l_name); 1663 return (1); 1664 } 1665 TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) { 1666 if (lun == lun2) 1667 continue; 1668 if (lun->l_path != NULL && lun2->l_path != NULL && 1669 strcmp(lun->l_path, lun2->l_path) == 0) { 1670 log_debugx("WARNING: path \"%s\" duplicated " 1671 "between lun \"%s\", and " 1672 "lun \"%s\"", lun->l_path, 1673 lun->l_name, lun2->l_name); 1674 } 1675 } 1676 1677 return (0); 1678} 1679 1680int 1681conf_verify(struct conf *conf) 1682{ 1683 struct auth_group *ag; 1684 struct portal_group *pg; 1685 struct port *port; 1686 struct target *targ; 1687 struct lun *lun; 1688 bool found; 1689 int error, i; 1690 1691 if (conf->conf_pidfile_path == NULL) 1692 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE); 1693 1694 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1695 error = conf_verify_lun(lun); 1696 if (error != 0) 1697 return (error); 1698 } 1699 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1700 if (targ->t_auth_group == NULL) { 1701 targ->t_auth_group = auth_group_find(conf, 1702 "default"); 1703 assert(targ->t_auth_group != NULL); 1704 } 1705 if (TAILQ_EMPTY(&targ->t_ports)) { 1706 pg = portal_group_find(conf, "default"); 1707 assert(pg != NULL); 1708 port_new(conf, targ, pg); 1709 } 1710 found = false; 1711 for (i = 0; i < MAX_LUNS; i++) { 1712 if (targ->t_luns[i] != NULL) 1713 found = true; 1714 } 1715 if (!found && targ->t_redirection == NULL) { 1716 log_warnx("no LUNs defined for target \"%s\"", 1717 targ->t_name); 1718 } 1719 if (found && targ->t_redirection != NULL) { 1720 log_debugx("target \"%s\" contains luns, " 1721 " but configured for redirection", 1722 targ->t_name); 1723 } 1724 } 1725 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1726 assert(pg->pg_name != NULL); 1727 if (pg->pg_discovery_auth_group == NULL) { 1728 pg->pg_discovery_auth_group = 1729 auth_group_find(conf, "default"); 1730 assert(pg->pg_discovery_auth_group != NULL); 1731 } 1732 1733 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN) 1734 pg->pg_discovery_filter = PG_FILTER_NONE; 1735 1736 if (pg->pg_redirection != NULL) { 1737 if (!TAILQ_EMPTY(&pg->pg_ports)) { 1738 log_debugx("portal-group \"%s\" assigned " 1739 "to target, but configured " 1740 "for redirection", 1741 pg->pg_name); 1742 } 1743 pg->pg_unassigned = false; 1744 } else if (!TAILQ_EMPTY(&pg->pg_ports)) { 1745 pg->pg_unassigned = false; 1746 } else { 1747 if (strcmp(pg->pg_name, "default") != 0) 1748 log_warnx("portal-group \"%s\" not assigned " 1749 "to any target", pg->pg_name); 1750 pg->pg_unassigned = true; 1751 } 1752 } 1753 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1754 if (ag->ag_name == NULL) 1755 assert(ag->ag_target != NULL); 1756 else 1757 assert(ag->ag_target == NULL); 1758 1759 found = false; 1760 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1761 if (targ->t_auth_group == ag) { 1762 found = true; 1763 break; 1764 } 1765 } 1766 TAILQ_FOREACH(port, &conf->conf_ports, p_next) { 1767 if (port->p_auth_group == ag) { 1768 found = true; 1769 break; 1770 } 1771 } 1772 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1773 if (pg->pg_discovery_auth_group == ag) { 1774 found = true; 1775 break; 1776 } 1777 } 1778 if (!found && ag->ag_name != NULL && 1779 strcmp(ag->ag_name, "default") != 0 && 1780 strcmp(ag->ag_name, "no-authentication") != 0 && 1781 strcmp(ag->ag_name, "no-access") != 0) { 1782 log_warnx("auth-group \"%s\" not assigned " 1783 "to any target", ag->ag_name); 1784 } 1785 } 1786 1787 return (0); 1788} 1789 1790static int 1791conf_apply(struct conf *oldconf, struct conf *newconf) 1792{ 1793 struct lun *oldlun, *newlun, *tmplun; 1794 struct portal_group *oldpg, *newpg; 1795 struct portal *oldp, *newp; 1796 struct port *oldport, *newport, *tmpport; 1797 struct isns *oldns, *newns; 1798 pid_t otherpid; 1799 int changed, cumulated_error = 0, error, sockbuf; 1800 int one = 1; 1801 1802 if (oldconf->conf_debug != newconf->conf_debug) { 1803 log_debugx("changing debug level to %d", newconf->conf_debug); 1804 log_init(newconf->conf_debug); 1805 } 1806 1807 if (oldconf->conf_pidfh != NULL) { 1808 assert(oldconf->conf_pidfile_path != NULL); 1809 if (newconf->conf_pidfile_path != NULL && 1810 strcmp(oldconf->conf_pidfile_path, 1811 newconf->conf_pidfile_path) == 0) { 1812 newconf->conf_pidfh = oldconf->conf_pidfh; 1813 oldconf->conf_pidfh = NULL; 1814 } else { 1815 log_debugx("removing pidfile %s", 1816 oldconf->conf_pidfile_path); 1817 pidfile_remove(oldconf->conf_pidfh); 1818 oldconf->conf_pidfh = NULL; 1819 } 1820 } 1821 1822 if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) { 1823 log_debugx("opening pidfile %s", newconf->conf_pidfile_path); 1824 newconf->conf_pidfh = 1825 pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid); 1826 if (newconf->conf_pidfh == NULL) { 1827 if (errno == EEXIST) 1828 log_errx(1, "daemon already running, pid: %jd.", 1829 (intmax_t)otherpid); 1830 log_err(1, "cannot open or create pidfile \"%s\"", 1831 newconf->conf_pidfile_path); 1832 } 1833 } 1834 1835 /* 1836 * Go through the new portal groups, assigning tags or preserving old. 1837 */ 1838 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 1839 if (newpg->pg_tag != 0) 1840 continue; 1841 oldpg = portal_group_find(oldconf, newpg->pg_name); 1842 if (oldpg != NULL) 1843 newpg->pg_tag = oldpg->pg_tag; 1844 else 1845 newpg->pg_tag = ++last_portal_group_tag; 1846 } 1847 1848 /* Deregister on removed iSNS servers. */ 1849 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) { 1850 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) { 1851 if (strcmp(oldns->i_addr, newns->i_addr) == 0) 1852 break; 1853 } 1854 if (newns == NULL) 1855 isns_deregister(oldns); 1856 } 1857 1858 /* 1859 * XXX: If target or lun removal fails, we should somehow "move" 1860 * the old lun or target into newconf, so that subsequent 1861 * conf_apply() would try to remove them again. That would 1862 * be somewhat hairy, though, and lun deletion failures don't 1863 * really happen, so leave it as it is for now. 1864 */ 1865 /* 1866 * First, remove any ports present in the old configuration 1867 * and missing in the new one. 1868 */ 1869 TAILQ_FOREACH_SAFE(oldport, &oldconf->conf_ports, p_next, tmpport) { 1870 if (oldport->p_foreign) 1871 continue; 1872 newport = port_find(newconf, oldport->p_name); 1873 if (newport != NULL && !newport->p_foreign) 1874 continue; 1875 log_debugx("removing port \"%s\"", oldport->p_name); 1876 error = kernel_port_remove(oldport); 1877 if (error != 0) { 1878 log_warnx("failed to remove port %s", 1879 oldport->p_name); 1880 /* 1881 * XXX: Uncomment after fixing the root cause. 1882 * 1883 * cumulated_error++; 1884 */ 1885 } 1886 } 1887 1888 /* 1889 * Second, remove any LUNs present in the old configuration 1890 * and missing in the new one. 1891 */ 1892 TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) { 1893 newlun = lun_find(newconf, oldlun->l_name); 1894 if (newlun == NULL) { 1895 log_debugx("lun \"%s\", CTL lun %d " 1896 "not found in new configuration; " 1897 "removing", oldlun->l_name, oldlun->l_ctl_lun); 1898 error = kernel_lun_remove(oldlun); 1899 if (error != 0) { 1900 log_warnx("failed to remove lun \"%s\", " 1901 "CTL lun %d", 1902 oldlun->l_name, oldlun->l_ctl_lun); 1903 cumulated_error++; 1904 } 1905 continue; 1906 } 1907 1908 /* 1909 * Also remove the LUNs changed by more than size. 1910 */ 1911 changed = 0; 1912 assert(oldlun->l_backend != NULL); 1913 assert(newlun->l_backend != NULL); 1914 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) { 1915 log_debugx("backend for lun \"%s\", " 1916 "CTL lun %d changed; removing", 1917 oldlun->l_name, oldlun->l_ctl_lun); 1918 changed = 1; 1919 } 1920 if (oldlun->l_blocksize != newlun->l_blocksize) { 1921 log_debugx("blocksize for lun \"%s\", " 1922 "CTL lun %d changed; removing", 1923 oldlun->l_name, oldlun->l_ctl_lun); 1924 changed = 1; 1925 } 1926 if (newlun->l_device_id != NULL && 1927 (oldlun->l_device_id == NULL || 1928 strcmp(oldlun->l_device_id, newlun->l_device_id) != 1929 0)) { 1930 log_debugx("device-id for lun \"%s\", " 1931 "CTL lun %d changed; removing", 1932 oldlun->l_name, oldlun->l_ctl_lun); 1933 changed = 1; 1934 } 1935 if (newlun->l_path != NULL && 1936 (oldlun->l_path == NULL || 1937 strcmp(oldlun->l_path, newlun->l_path) != 0)) { 1938 log_debugx("path for lun \"%s\", " 1939 "CTL lun %d, changed; removing", 1940 oldlun->l_name, oldlun->l_ctl_lun); 1941 changed = 1; 1942 } 1943 if (newlun->l_serial != NULL && 1944 (oldlun->l_serial == NULL || 1945 strcmp(oldlun->l_serial, newlun->l_serial) != 0)) { 1946 log_debugx("serial for lun \"%s\", " 1947 "CTL lun %d changed; removing", 1948 oldlun->l_name, oldlun->l_ctl_lun); 1949 changed = 1; 1950 } 1951 if (changed) { 1952 error = kernel_lun_remove(oldlun); 1953 if (error != 0) { 1954 log_warnx("failed to remove lun \"%s\", " 1955 "CTL lun %d", 1956 oldlun->l_name, oldlun->l_ctl_lun); 1957 cumulated_error++; 1958 } 1959 lun_delete(oldlun); 1960 continue; 1961 } 1962 1963 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun); 1964 } 1965 1966 TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) { 1967 oldlun = lun_find(oldconf, newlun->l_name); 1968 if (oldlun != NULL) { 1969 log_debugx("modifying lun \"%s\", CTL lun %d", 1970 newlun->l_name, newlun->l_ctl_lun); 1971 error = kernel_lun_modify(newlun); 1972 if (error != 0) { 1973 log_warnx("failed to " 1974 "modify lun \"%s\", CTL lun %d", 1975 newlun->l_name, newlun->l_ctl_lun); 1976 cumulated_error++; 1977 } 1978 continue; 1979 } 1980 log_debugx("adding lun \"%s\"", newlun->l_name); 1981 error = kernel_lun_add(newlun); 1982 if (error != 0) { 1983 log_warnx("failed to add lun \"%s\"", newlun->l_name); 1984 lun_delete(newlun); 1985 cumulated_error++; 1986 } 1987 } 1988 1989 /* 1990 * Now add new ports or modify existing ones. 1991 */ 1992 TAILQ_FOREACH(newport, &newconf->conf_ports, p_next) { 1993 if (newport->p_foreign) 1994 continue; 1995 oldport = port_find(oldconf, newport->p_name); 1996 1997 if (oldport == NULL || oldport->p_foreign) { 1998 log_debugx("adding port \"%s\"", newport->p_name); 1999 error = kernel_port_add(newport); 2000 } else { 2001 log_debugx("updating port \"%s\"", newport->p_name); 2002 newport->p_ctl_port = oldport->p_ctl_port; 2003 error = kernel_port_update(newport, oldport); 2004 } 2005 if (error != 0) { 2006 log_warnx("failed to %s port %s", 2007 (oldport == NULL) ? "add" : "update", 2008 newport->p_name); 2009 /* 2010 * XXX: Uncomment after fixing the root cause. 2011 * 2012 * cumulated_error++; 2013 */ 2014 } 2015 } 2016 2017 /* 2018 * Go through the new portals, opening the sockets as necessary. 2019 */ 2020 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 2021 if (newpg->pg_foreign) 2022 continue; 2023 if (newpg->pg_unassigned) { 2024 log_debugx("not listening on portal-group \"%s\", " 2025 "not assigned to any target", 2026 newpg->pg_name); 2027 continue; 2028 } 2029 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) { 2030 /* 2031 * Try to find already open portal and reuse 2032 * the listening socket. We don't care about 2033 * what portal or portal group that was, what 2034 * matters is the listening address. 2035 */ 2036 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, 2037 pg_next) { 2038 TAILQ_FOREACH(oldp, &oldpg->pg_portals, 2039 p_next) { 2040 if (strcmp(newp->p_listen, 2041 oldp->p_listen) == 0 && 2042 oldp->p_socket > 0) { 2043 newp->p_socket = 2044 oldp->p_socket; 2045 oldp->p_socket = 0; 2046 break; 2047 } 2048 } 2049 } 2050 if (newp->p_socket > 0) { 2051 /* 2052 * We're done with this portal. 2053 */ 2054 continue; 2055 } 2056 2057#ifdef ICL_KERNEL_PROXY 2058 if (proxy_mode) { 2059 newpg->pg_conf->conf_portal_id++; 2060 newp->p_id = newpg->pg_conf->conf_portal_id; 2061 log_debugx("listening on %s, portal-group " 2062 "\"%s\", portal id %d, using ICL proxy", 2063 newp->p_listen, newpg->pg_name, newp->p_id); 2064 kernel_listen(newp->p_ai, newp->p_iser, 2065 newp->p_id); 2066 continue; 2067 } 2068#endif 2069 assert(proxy_mode == false); 2070 assert(newp->p_iser == false); 2071 2072 log_debugx("listening on %s, portal-group \"%s\"", 2073 newp->p_listen, newpg->pg_name); 2074 newp->p_socket = socket(newp->p_ai->ai_family, 2075 newp->p_ai->ai_socktype, 2076 newp->p_ai->ai_protocol); 2077 if (newp->p_socket < 0) { 2078 log_warn("socket(2) failed for %s", 2079 newp->p_listen); 2080 cumulated_error++; 2081 continue; 2082 } 2083 sockbuf = SOCKBUF_SIZE; 2084 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF, 2085 &sockbuf, sizeof(sockbuf)) == -1) 2086 log_warn("setsockopt(SO_RCVBUF) failed " 2087 "for %s", newp->p_listen); 2088 sockbuf = SOCKBUF_SIZE; 2089 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF, 2090 &sockbuf, sizeof(sockbuf)) == -1) 2091 log_warn("setsockopt(SO_SNDBUF) failed " 2092 "for %s", newp->p_listen); 2093 error = setsockopt(newp->p_socket, SOL_SOCKET, 2094 SO_REUSEADDR, &one, sizeof(one)); 2095 if (error != 0) { 2096 log_warn("setsockopt(SO_REUSEADDR) failed " 2097 "for %s", newp->p_listen); 2098 close(newp->p_socket); 2099 newp->p_socket = 0; 2100 cumulated_error++; 2101 continue; 2102 } 2103 error = bind(newp->p_socket, newp->p_ai->ai_addr, 2104 newp->p_ai->ai_addrlen); 2105 if (error != 0) { 2106 log_warn("bind(2) failed for %s", 2107 newp->p_listen); 2108 close(newp->p_socket); 2109 newp->p_socket = 0; 2110 cumulated_error++; 2111 continue; 2112 } 2113 error = listen(newp->p_socket, -1); 2114 if (error != 0) { 2115 log_warn("listen(2) failed for %s", 2116 newp->p_listen); 2117 close(newp->p_socket); 2118 newp->p_socket = 0; 2119 cumulated_error++; 2120 continue; 2121 } 2122 } 2123 } 2124 2125 /* 2126 * Go through the no longer used sockets, closing them. 2127 */ 2128 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) { 2129 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) { 2130 if (oldp->p_socket <= 0) 2131 continue; 2132 log_debugx("closing socket for %s, portal-group \"%s\"", 2133 oldp->p_listen, oldpg->pg_name); 2134 close(oldp->p_socket); 2135 oldp->p_socket = 0; 2136 } 2137 } 2138 2139 /* (Re-)Register on remaining/new iSNS servers. */ 2140 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) { 2141 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) { 2142 if (strcmp(oldns->i_addr, newns->i_addr) == 0) 2143 break; 2144 } 2145 isns_register(newns, oldns); 2146 } 2147 2148 /* Schedule iSNS update */ 2149 if (!TAILQ_EMPTY(&newconf->conf_isns)) 2150 set_timeout((newconf->conf_isns_period + 2) / 3, false); 2151 2152 return (cumulated_error); 2153} 2154 2155bool 2156timed_out(void) 2157{ 2158 2159 return (sigalrm_received); 2160} 2161 2162static void 2163sigalrm_handler_fatal(int dummy __unused) 2164{ 2165 /* 2166 * It would be easiest to just log an error and exit. We can't 2167 * do this, though, because log_errx() is not signal safe, since 2168 * it calls syslog(3). Instead, set a flag checked by pdu_send() 2169 * and pdu_receive(), to call log_errx() there. Should they fail 2170 * to notice, we'll exit here one second later. 2171 */ 2172 if (sigalrm_received) { 2173 /* 2174 * Oh well. Just give up and quit. 2175 */ 2176 _exit(2); 2177 } 2178 2179 sigalrm_received = true; 2180} 2181 2182static void 2183sigalrm_handler(int dummy __unused) 2184{ 2185 2186 sigalrm_received = true; 2187} 2188 2189void 2190set_timeout(int timeout, int fatal) 2191{ 2192 struct sigaction sa; 2193 struct itimerval itv; 2194 int error; 2195 2196 if (timeout <= 0) { 2197 log_debugx("session timeout disabled"); 2198 bzero(&itv, sizeof(itv)); 2199 error = setitimer(ITIMER_REAL, &itv, NULL); 2200 if (error != 0) 2201 log_err(1, "setitimer"); 2202 sigalrm_received = false; 2203 return; 2204 } 2205 2206 sigalrm_received = false; 2207 bzero(&sa, sizeof(sa)); 2208 if (fatal) 2209 sa.sa_handler = sigalrm_handler_fatal; 2210 else 2211 sa.sa_handler = sigalrm_handler; 2212 sigfillset(&sa.sa_mask); 2213 error = sigaction(SIGALRM, &sa, NULL); 2214 if (error != 0) 2215 log_err(1, "sigaction"); 2216 2217 /* 2218 * First SIGALRM will arive after conf_timeout seconds. 2219 * If we do nothing, another one will arrive a second later. 2220 */ 2221 log_debugx("setting session timeout to %d seconds", timeout); 2222 bzero(&itv, sizeof(itv)); 2223 itv.it_interval.tv_sec = 1; 2224 itv.it_value.tv_sec = timeout; 2225 error = setitimer(ITIMER_REAL, &itv, NULL); 2226 if (error != 0) 2227 log_err(1, "setitimer"); 2228} 2229 2230static int 2231wait_for_children(bool block) 2232{ 2233 pid_t pid; 2234 int status; 2235 int num = 0; 2236 2237 for (;;) { 2238 /* 2239 * If "block" is true, wait for at least one process. 2240 */ 2241 if (block && num == 0) 2242 pid = wait4(-1, &status, 0, NULL); 2243 else 2244 pid = wait4(-1, &status, WNOHANG, NULL); 2245 if (pid <= 0) 2246 break; 2247 if (WIFSIGNALED(status)) { 2248 log_warnx("child process %d terminated with signal %d", 2249 pid, WTERMSIG(status)); 2250 } else if (WEXITSTATUS(status) != 0) { 2251 log_warnx("child process %d terminated with exit status %d", 2252 pid, WEXITSTATUS(status)); 2253 } else { 2254 log_debugx("child process %d terminated gracefully", pid); 2255 } 2256 num++; 2257 } 2258 2259 return (num); 2260} 2261 2262static void 2263handle_connection(struct portal *portal, int fd, 2264 const struct sockaddr *client_sa, bool dont_fork) 2265{ 2266 struct connection *conn; 2267 int error; 2268 pid_t pid; 2269 char host[NI_MAXHOST + 1]; 2270 struct conf *conf; 2271 2272 conf = portal->p_portal_group->pg_conf; 2273 2274 if (dont_fork) { 2275 log_debugx("incoming connection; not forking due to -d flag"); 2276 } else { 2277 nchildren -= wait_for_children(false); 2278 assert(nchildren >= 0); 2279 2280 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) { 2281 log_debugx("maxproc limit of %d child processes hit; " 2282 "waiting for child process to exit", conf->conf_maxproc); 2283 nchildren -= wait_for_children(true); 2284 assert(nchildren >= 0); 2285 } 2286 log_debugx("incoming connection; forking child process #%d", 2287 nchildren); 2288 nchildren++; 2289 pid = fork(); 2290 if (pid < 0) 2291 log_err(1, "fork"); 2292 if (pid > 0) { 2293 close(fd); 2294 return; 2295 } 2296 } 2297 pidfile_close(conf->conf_pidfh); 2298 2299 error = getnameinfo(client_sa, client_sa->sa_len, 2300 host, sizeof(host), NULL, 0, NI_NUMERICHOST); 2301 if (error != 0) 2302 log_errx(1, "getnameinfo: %s", gai_strerror(error)); 2303 2304 log_debugx("accepted connection from %s; portal group \"%s\"", 2305 host, portal->p_portal_group->pg_name); 2306 log_set_peer_addr(host); 2307 setproctitle("%s", host); 2308 2309 conn = connection_new(portal, fd, host, client_sa); 2310 set_timeout(conf->conf_timeout, true); 2311 kernel_capsicate(); 2312 login(conn); 2313 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) { 2314 kernel_handoff(conn); 2315 log_debugx("connection handed off to the kernel"); 2316 } else { 2317 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY); 2318 discovery(conn); 2319 } 2320 log_debugx("nothing more to do; exiting"); 2321 exit(0); 2322} 2323 2324static int 2325fd_add(int fd, fd_set *fdset, int nfds) 2326{ 2327 2328 /* 2329 * Skip sockets which we failed to bind. 2330 */ 2331 if (fd <= 0) 2332 return (nfds); 2333 2334 FD_SET(fd, fdset); 2335 if (fd > nfds) 2336 nfds = fd; 2337 return (nfds); 2338} 2339 2340static void 2341main_loop(struct conf *conf, bool dont_fork) 2342{ 2343 struct portal_group *pg; 2344 struct portal *portal; 2345 struct sockaddr_storage client_sa; 2346 socklen_t client_salen; 2347#ifdef ICL_KERNEL_PROXY 2348 int connection_id; 2349 int portal_id; 2350#endif 2351 fd_set fdset; 2352 int error, nfds, client_fd; 2353 2354 pidfile_write(conf->conf_pidfh); 2355 2356 for (;;) { 2357 if (sighup_received || sigterm_received || timed_out()) 2358 return; 2359 2360#ifdef ICL_KERNEL_PROXY 2361 if (proxy_mode) { 2362 client_salen = sizeof(client_sa); 2363 kernel_accept(&connection_id, &portal_id, 2364 (struct sockaddr *)&client_sa, &client_salen); 2365 assert(client_salen >= client_sa.ss_len); 2366 2367 log_debugx("incoming connection, id %d, portal id %d", 2368 connection_id, portal_id); 2369 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2370 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 2371 if (portal->p_id == portal_id) { 2372 goto found; 2373 } 2374 } 2375 } 2376 2377 log_errx(1, "kernel returned invalid portal_id %d", 2378 portal_id); 2379 2380found: 2381 handle_connection(portal, connection_id, 2382 (struct sockaddr *)&client_sa, dont_fork); 2383 } else { 2384#endif 2385 assert(proxy_mode == false); 2386 2387 FD_ZERO(&fdset); 2388 nfds = 0; 2389 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2390 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 2391 nfds = fd_add(portal->p_socket, &fdset, nfds); 2392 } 2393 error = select(nfds + 1, &fdset, NULL, NULL, NULL); 2394 if (error <= 0) { 2395 if (errno == EINTR) 2396 return; 2397 log_err(1, "select"); 2398 } 2399 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2400 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 2401 if (!FD_ISSET(portal->p_socket, &fdset)) 2402 continue; 2403 client_salen = sizeof(client_sa); 2404 client_fd = accept(portal->p_socket, 2405 (struct sockaddr *)&client_sa, 2406 &client_salen); 2407 if (client_fd < 0) { 2408 if (errno == ECONNABORTED) 2409 continue; 2410 log_err(1, "accept"); 2411 } 2412 assert(client_salen >= client_sa.ss_len); 2413 2414 handle_connection(portal, client_fd, 2415 (struct sockaddr *)&client_sa, 2416 dont_fork); 2417 break; 2418 } 2419 } 2420#ifdef ICL_KERNEL_PROXY 2421 } 2422#endif 2423 } 2424} 2425 2426static void 2427sighup_handler(int dummy __unused) 2428{ 2429 2430 sighup_received = true; 2431} 2432 2433static void 2434sigterm_handler(int dummy __unused) 2435{ 2436 2437 sigterm_received = true; 2438} 2439 2440static void 2441sigchld_handler(int dummy __unused) 2442{ 2443 2444 /* 2445 * The only purpose of this handler is to make SIGCHLD 2446 * interrupt the ISCSIDWAIT ioctl(2), so we can call 2447 * wait_for_children(). 2448 */ 2449} 2450 2451static void 2452register_signals(void) 2453{ 2454 struct sigaction sa; 2455 int error; 2456 2457 bzero(&sa, sizeof(sa)); 2458 sa.sa_handler = sighup_handler; 2459 sigfillset(&sa.sa_mask); 2460 error = sigaction(SIGHUP, &sa, NULL); 2461 if (error != 0) 2462 log_err(1, "sigaction"); 2463 2464 sa.sa_handler = sigterm_handler; 2465 error = sigaction(SIGTERM, &sa, NULL); 2466 if (error != 0) 2467 log_err(1, "sigaction"); 2468 2469 sa.sa_handler = sigterm_handler; 2470 error = sigaction(SIGINT, &sa, NULL); 2471 if (error != 0) 2472 log_err(1, "sigaction"); 2473 2474 sa.sa_handler = sigchld_handler; 2475 error = sigaction(SIGCHLD, &sa, NULL); 2476 if (error != 0) 2477 log_err(1, "sigaction"); 2478} 2479 2480int 2481main(int argc, char **argv) 2482{ 2483 struct conf *oldconf, *newconf, *tmpconf; 2484 struct isns *newns; 2485 const char *config_path = DEFAULT_CONFIG_PATH; 2486 int debug = 0, ch, error; 2487 bool dont_daemonize = false; 2488 2489 while ((ch = getopt(argc, argv, "df:R")) != -1) { 2490 switch (ch) { 2491 case 'd': 2492 dont_daemonize = true; 2493 debug++; 2494 break; 2495 case 'f': 2496 config_path = optarg; 2497 break; 2498 case 'R': 2499#ifndef ICL_KERNEL_PROXY 2500 log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY " 2501 "does not support iSER protocol"); 2502#endif 2503 proxy_mode = true; 2504 break; 2505 case '?': 2506 default: 2507 usage(); 2508 } 2509 } 2510 argc -= optind; 2511 if (argc != 0) 2512 usage(); 2513 2514 log_init(debug); 2515 kernel_init(); 2516 2517 oldconf = conf_new_from_kernel(); 2518 newconf = conf_new_from_file(config_path, oldconf); 2519 if (newconf == NULL) 2520 log_errx(1, "configuration error; exiting"); 2521 if (debug > 0) { 2522 oldconf->conf_debug = debug; 2523 newconf->conf_debug = debug; 2524 } 2525 2526 error = conf_apply(oldconf, newconf); 2527 if (error != 0) 2528 log_errx(1, "failed to apply configuration; exiting"); 2529 2530 conf_delete(oldconf); 2531 oldconf = NULL; 2532 2533 register_signals(); 2534 2535 if (dont_daemonize == false) { 2536 log_debugx("daemonizing"); 2537 if (daemon(0, 0) == -1) { 2538 log_warn("cannot daemonize"); 2539 pidfile_remove(newconf->conf_pidfh); 2540 exit(1); 2541 } 2542 } 2543 2544 /* Schedule iSNS update */ 2545 if (!TAILQ_EMPTY(&newconf->conf_isns)) 2546 set_timeout((newconf->conf_isns_period + 2) / 3, false); 2547 2548 for (;;) { 2549 main_loop(newconf, dont_daemonize); 2550 if (sighup_received) { 2551 sighup_received = false; 2552 log_debugx("received SIGHUP, reloading configuration"); 2553 tmpconf = conf_new_from_file(config_path, newconf); 2554 if (tmpconf == NULL) { 2555 log_warnx("configuration error, " 2556 "continuing with old configuration"); 2557 } else { 2558 if (debug > 0) 2559 tmpconf->conf_debug = debug; 2560 oldconf = newconf; 2561 newconf = tmpconf; 2562 error = conf_apply(oldconf, newconf); 2563 if (error != 0) 2564 log_warnx("failed to reload " 2565 "configuration"); 2566 conf_delete(oldconf); 2567 oldconf = NULL; 2568 } 2569 } else if (sigterm_received) { 2570 log_debugx("exiting on signal; " 2571 "reloading empty configuration"); 2572 2573 log_debugx("removing CTL iSCSI ports " 2574 "and terminating all connections"); 2575 2576 oldconf = newconf; 2577 newconf = conf_new(); 2578 if (debug > 0) 2579 newconf->conf_debug = debug; 2580 error = conf_apply(oldconf, newconf); 2581 if (error != 0) 2582 log_warnx("failed to apply configuration"); 2583 conf_delete(oldconf); 2584 oldconf = NULL; 2585 2586 log_warnx("exiting on signal"); 2587 exit(0); 2588 } else { 2589 nchildren -= wait_for_children(false); 2590 assert(nchildren >= 0); 2591 if (timed_out()) { 2592 set_timeout(0, false); 2593 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) 2594 isns_check(newns); 2595 /* Schedule iSNS update */ 2596 if (!TAILQ_EMPTY(&newconf->conf_isns)) { 2597 set_timeout((newconf->conf_isns_period 2598 + 2) / 3, 2599 false); 2600 } 2601 } 2602 } 2603 } 2604 /* NOTREACHED */ 2605} 2606