ctld.c revision 288728
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 288728 2015-10-05 08:52:37Z mav $"); 33 34#include <sys/types.h> 35#include <sys/time.h> 36#include <sys/socket.h> 37#include <sys/wait.h> 38#include <netinet/in.h> 39#include <arpa/inet.h> 40#include <assert.h> 41#include <ctype.h> 42#include <errno.h> 43#include <netdb.h> 44#include <signal.h> 45#include <stdbool.h> 46#include <stdio.h> 47#include <stdint.h> 48#include <stdlib.h> 49#include <string.h> 50#include <unistd.h> 51 52#include "ctld.h" 53#include "isns.h" 54 55bool proxy_mode = false; 56 57static volatile bool sighup_received = false; 58static volatile bool sigterm_received = false; 59static volatile bool sigalrm_received = false; 60 61static int nchildren = 0; 62static uint16_t last_portal_group_tag = 0; 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 16 characters " 201 "long", auth->a_user, 202 auth->a_auth_group->ag_target->t_name); 203 } 204 205 if (auth->a_mutual_secret != NULL) { 206 len = strlen(auth->a_mutual_secret); 207 if (len > 16) { 208 if (auth->a_auth_group->ag_name != NULL) 209 log_warnx("mutual secret for user \"%s\", " 210 "auth-group \"%s\", is too long; it should " 211 "be at most 16 characters long", 212 auth->a_user, auth->a_auth_group->ag_name); 213 else 214 log_warnx("mutual secret for user \"%s\", " 215 "target \"%s\", is too long; it should " 216 "be at most 16 characters long", 217 auth->a_user, 218 auth->a_auth_group->ag_target->t_name); 219 } 220 if (len < 12) { 221 if (auth->a_auth_group->ag_name != NULL) 222 log_warnx("mutual secret for user \"%s\", " 223 "auth-group \"%s\", is too short; it " 224 "should be at least 12 characters long", 225 auth->a_user, auth->a_auth_group->ag_name); 226 else 227 log_warnx("mutual secret for user \"%s\", " 228 "target \"%s\", is too short; it should be " 229 "at least 16 characters long", 230 auth->a_user, 231 auth->a_auth_group->ag_target->t_name); 232 } 233 } 234} 235 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(ap); 404 log_errx(1, "Incorrect initiator portal '%s'", portal); 405 return (NULL); 406} 407 408static void 409auth_portal_delete(struct auth_portal *ap) 410{ 411 TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next); 412 413 free(ap->ap_initator_portal); 414 free(ap); 415} 416 417bool 418auth_portal_defined(const struct auth_group *ag) 419{ 420 if (TAILQ_EMPTY(&ag->ag_portals)) 421 return (false); 422 return (true); 423} 424 425const struct auth_portal * 426auth_portal_find(const struct auth_group *ag, const struct sockaddr_storage *ss) 427{ 428 const struct auth_portal *ap; 429 const uint8_t *a, *b; 430 int i; 431 uint8_t bmask; 432 433 TAILQ_FOREACH(ap, &ag->ag_portals, ap_next) { 434 if (ap->ap_sa.ss_family != ss->ss_family) 435 continue; 436 if (ss->ss_family == AF_INET) { 437 a = (const uint8_t *) 438 &((const struct sockaddr_in *)ss)->sin_addr; 439 b = (const uint8_t *) 440 &((const struct sockaddr_in *)&ap->ap_sa)->sin_addr; 441 } else { 442 a = (const uint8_t *) 443 &((const struct sockaddr_in6 *)ss)->sin6_addr; 444 b = (const uint8_t *) 445 &((const struct sockaddr_in6 *)&ap->ap_sa)->sin6_addr; 446 } 447 for (i = 0; i < ap->ap_mask / 8; i++) { 448 if (a[i] != b[i]) 449 goto next; 450 } 451 if (ap->ap_mask % 8) { 452 bmask = 0xff << (8 - (ap->ap_mask % 8)); 453 if ((a[i] & bmask) != (b[i] & bmask)) 454 goto next; 455 } 456 return (ap); 457next: 458 ; 459 } 460 461 return (NULL); 462} 463 464int 465auth_portal_check(const struct auth_group *ag, const struct sockaddr_storage *sa) 466{ 467 468 if (!auth_portal_defined(ag)) 469 return (0); 470 471 if (auth_portal_find(ag, sa) == NULL) 472 return (1); 473 474 return (0); 475} 476 477struct auth_group * 478auth_group_new(struct conf *conf, const char *name) 479{ 480 struct auth_group *ag; 481 482 if (name != NULL) { 483 ag = auth_group_find(conf, name); 484 if (ag != NULL) { 485 log_warnx("duplicated auth-group \"%s\"", name); 486 return (NULL); 487 } 488 } 489 490 ag = calloc(1, sizeof(*ag)); 491 if (ag == NULL) 492 log_err(1, "calloc"); 493 if (name != NULL) 494 ag->ag_name = checked_strdup(name); 495 TAILQ_INIT(&ag->ag_auths); 496 TAILQ_INIT(&ag->ag_names); 497 TAILQ_INIT(&ag->ag_portals); 498 ag->ag_conf = conf; 499 TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next); 500 501 return (ag); 502} 503 504void 505auth_group_delete(struct auth_group *ag) 506{ 507 struct auth *auth, *auth_tmp; 508 struct auth_name *auth_name, *auth_name_tmp; 509 struct auth_portal *auth_portal, *auth_portal_tmp; 510 511 TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next); 512 513 TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp) 514 auth_delete(auth); 515 TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp) 516 auth_name_delete(auth_name); 517 TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next, 518 auth_portal_tmp) 519 auth_portal_delete(auth_portal); 520 free(ag->ag_name); 521 free(ag); 522} 523 524struct auth_group * 525auth_group_find(const struct conf *conf, const char *name) 526{ 527 struct auth_group *ag; 528 529 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 530 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0) 531 return (ag); 532 } 533 534 return (NULL); 535} 536 537int 538auth_group_set_type(struct auth_group *ag, const char *str) 539{ 540 int type; 541 542 if (strcmp(str, "none") == 0) { 543 type = AG_TYPE_NO_AUTHENTICATION; 544 } else if (strcmp(str, "deny") == 0) { 545 type = AG_TYPE_DENY; 546 } else if (strcmp(str, "chap") == 0) { 547 type = AG_TYPE_CHAP; 548 } else if (strcmp(str, "chap-mutual") == 0) { 549 type = AG_TYPE_CHAP_MUTUAL; 550 } else { 551 if (ag->ag_name != NULL) 552 log_warnx("invalid auth-type \"%s\" for auth-group " 553 "\"%s\"", str, ag->ag_name); 554 else 555 log_warnx("invalid auth-type \"%s\" for target " 556 "\"%s\"", str, ag->ag_target->t_name); 557 return (1); 558 } 559 560 if (ag->ag_type != AG_TYPE_UNKNOWN && ag->ag_type != type) { 561 if (ag->ag_name != NULL) { 562 log_warnx("cannot set auth-type to \"%s\" for " 563 "auth-group \"%s\"; already has a different " 564 "type", str, ag->ag_name); 565 } else { 566 log_warnx("cannot set auth-type to \"%s\" for target " 567 "\"%s\"; already has a different type", 568 str, ag->ag_target->t_name); 569 } 570 return (1); 571 } 572 573 ag->ag_type = type; 574 575 return (0); 576} 577 578static struct portal * 579portal_new(struct portal_group *pg) 580{ 581 struct portal *portal; 582 583 portal = calloc(1, sizeof(*portal)); 584 if (portal == NULL) 585 log_err(1, "calloc"); 586 TAILQ_INIT(&portal->p_targets); 587 portal->p_portal_group = pg; 588 TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next); 589 return (portal); 590} 591 592static void 593portal_delete(struct portal *portal) 594{ 595 596 TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next); 597 if (portal->p_ai != NULL) 598 freeaddrinfo(portal->p_ai); 599 free(portal->p_listen); 600 free(portal); 601} 602 603struct portal_group * 604portal_group_new(struct conf *conf, const char *name) 605{ 606 struct portal_group *pg; 607 608 pg = portal_group_find(conf, name); 609 if (pg != NULL) { 610 log_warnx("duplicated portal-group \"%s\"", name); 611 return (NULL); 612 } 613 614 pg = calloc(1, sizeof(*pg)); 615 if (pg == NULL) 616 log_err(1, "calloc"); 617 pg->pg_name = checked_strdup(name); 618 TAILQ_INIT(&pg->pg_portals); 619 TAILQ_INIT(&pg->pg_ports); 620 pg->pg_conf = conf; 621 pg->pg_tag = 0; /* Assigned later in conf_apply(). */ 622 TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next); 623 624 return (pg); 625} 626 627void 628portal_group_delete(struct portal_group *pg) 629{ 630 struct portal *portal, *tmp; 631 struct port *port, *tport; 632 633 TAILQ_FOREACH_SAFE(port, &pg->pg_ports, p_pgs, tport) 634 port_delete(port); 635 TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next); 636 637 TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp) 638 portal_delete(portal); 639 free(pg->pg_name); 640 free(pg->pg_redirection); 641 free(pg); 642} 643 644struct portal_group * 645portal_group_find(const struct conf *conf, const char *name) 646{ 647 struct portal_group *pg; 648 649 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 650 if (strcmp(pg->pg_name, name) == 0) 651 return (pg); 652 } 653 654 return (NULL); 655} 656 657static int 658parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai) 659{ 660 struct addrinfo hints; 661 char *str, *addr, *ch; 662 const char *port; 663 int error, colons = 0; 664 665 str = arg = strdup(arg); 666 if (arg[0] == '[') { 667 /* 668 * IPv6 address in square brackets, perhaps with port. 669 */ 670 arg++; 671 addr = strsep(&arg, "]"); 672 if (arg == NULL) 673 return (1); 674 if (arg[0] == '\0') { 675 port = def_port; 676 } else if (arg[0] == ':') { 677 port = arg + 1; 678 } else { 679 free(str); 680 return (1); 681 } 682 } else { 683 /* 684 * Either IPv6 address without brackets - and without 685 * a port - or IPv4 address. Just count the colons. 686 */ 687 for (ch = arg; *ch != '\0'; ch++) { 688 if (*ch == ':') 689 colons++; 690 } 691 if (colons > 1) { 692 addr = arg; 693 port = def_port; 694 } else { 695 addr = strsep(&arg, ":"); 696 if (arg == NULL) 697 port = def_port; 698 else 699 port = arg; 700 } 701 } 702 703 memset(&hints, 0, sizeof(hints)); 704 hints.ai_family = PF_UNSPEC; 705 hints.ai_socktype = SOCK_STREAM; 706 hints.ai_flags = AI_PASSIVE; 707 error = getaddrinfo(addr, port, &hints, ai); 708 free(str); 709 return ((error != 0) ? 1 : 0); 710} 711 712int 713portal_group_add_listen(struct portal_group *pg, const char *value, bool iser) 714{ 715 struct portal *portal; 716 717 portal = portal_new(pg); 718 portal->p_listen = checked_strdup(value); 719 portal->p_iser = iser; 720 721 if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) { 722 log_warnx("invalid listen address %s", portal->p_listen); 723 portal_delete(portal); 724 return (1); 725 } 726 727 /* 728 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 729 * those into multiple portals. 730 */ 731 732 return (0); 733} 734 735int 736isns_new(struct conf *conf, const char *addr) 737{ 738 struct isns *isns; 739 740 isns = calloc(1, sizeof(*isns)); 741 if (isns == NULL) 742 log_err(1, "calloc"); 743 isns->i_conf = conf; 744 TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next); 745 isns->i_addr = checked_strdup(addr); 746 747 if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) { 748 log_warnx("invalid iSNS address %s", isns->i_addr); 749 isns_delete(isns); 750 return (1); 751 } 752 753 /* 754 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 755 * those into multiple servers. 756 */ 757 758 return (0); 759} 760 761void 762isns_delete(struct isns *isns) 763{ 764 765 TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next); 766 free(isns->i_addr); 767 if (isns->i_ai != NULL) 768 freeaddrinfo(isns->i_ai); 769 free(isns); 770} 771 772static int 773isns_do_connect(struct isns *isns) 774{ 775 int s; 776 777 s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype, 778 isns->i_ai->ai_protocol); 779 if (s < 0) { 780 log_warn("socket(2) failed for %s", isns->i_addr); 781 return (-1); 782 } 783 if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) { 784 log_warn("connect(2) failed for %s", isns->i_addr); 785 close(s); 786 return (-1); 787 } 788 return(s); 789} 790 791static int 792isns_do_register(struct isns *isns, int s, const char *hostname) 793{ 794 struct conf *conf = isns->i_conf; 795 struct target *target; 796 struct portal *portal; 797 struct portal_group *pg; 798 struct port *port; 799 struct isns_req *req; 800 int res = 0; 801 uint32_t error; 802 803 req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT); 804 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 805 isns_req_add_delim(req); 806 isns_req_add_str(req, 1, hostname); 807 isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */ 808 isns_req_add_32(req, 6, conf->conf_isns_period); 809 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 810 if (pg->pg_unassigned) 811 continue; 812 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 813 isns_req_add_addr(req, 16, portal->p_ai); 814 isns_req_add_port(req, 17, portal->p_ai); 815 } 816 } 817 TAILQ_FOREACH(target, &conf->conf_targets, t_next) { 818 isns_req_add_str(req, 32, target->t_name); 819 isns_req_add_32(req, 33, 1); /* 1 -- Target*/ 820 if (target->t_alias != NULL) 821 isns_req_add_str(req, 34, target->t_alias); 822 TAILQ_FOREACH(port, &target->t_ports, p_ts) { 823 if ((pg = port->p_portal_group) == NULL) 824 continue; 825 isns_req_add_32(req, 51, pg->pg_tag); 826 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 827 isns_req_add_addr(req, 49, portal->p_ai); 828 isns_req_add_port(req, 50, portal->p_ai); 829 } 830 } 831 } 832 res = isns_req_send(s, req); 833 if (res < 0) { 834 log_warn("send(2) failed for %s", isns->i_addr); 835 goto quit; 836 } 837 res = isns_req_receive(s, req); 838 if (res < 0) { 839 log_warn("receive(2) failed for %s", isns->i_addr); 840 goto quit; 841 } 842 error = isns_req_get_status(req); 843 if (error != 0) { 844 log_warnx("iSNS register error %d for %s", error, isns->i_addr); 845 res = -1; 846 } 847quit: 848 isns_req_free(req); 849 return (res); 850} 851 852static int 853isns_do_check(struct isns *isns, int s, const char *hostname) 854{ 855 struct conf *conf = isns->i_conf; 856 struct isns_req *req; 857 int res = 0; 858 uint32_t error; 859 860 req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT); 861 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 862 isns_req_add_str(req, 1, hostname); 863 isns_req_add_delim(req); 864 isns_req_add(req, 2, 0, NULL); 865 res = isns_req_send(s, req); 866 if (res < 0) { 867 log_warn("send(2) failed for %s", isns->i_addr); 868 goto quit; 869 } 870 res = isns_req_receive(s, req); 871 if (res < 0) { 872 log_warn("receive(2) failed for %s", isns->i_addr); 873 goto quit; 874 } 875 error = isns_req_get_status(req); 876 if (error != 0) { 877 log_warnx("iSNS check error %d for %s", error, isns->i_addr); 878 res = -1; 879 } 880quit: 881 isns_req_free(req); 882 return (res); 883} 884 885static int 886isns_do_deregister(struct isns *isns, int s, const char *hostname) 887{ 888 struct conf *conf = isns->i_conf; 889 struct isns_req *req; 890 int res = 0; 891 uint32_t error; 892 893 req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT); 894 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name); 895 isns_req_add_delim(req); 896 isns_req_add_str(req, 1, hostname); 897 res = isns_req_send(s, req); 898 if (res < 0) { 899 log_warn("send(2) failed for %s", isns->i_addr); 900 goto quit; 901 } 902 res = isns_req_receive(s, req); 903 if (res < 0) { 904 log_warn("receive(2) failed for %s", isns->i_addr); 905 goto quit; 906 } 907 error = isns_req_get_status(req); 908 if (error != 0) { 909 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr); 910 res = -1; 911 } 912quit: 913 isns_req_free(req); 914 return (res); 915} 916 917void 918isns_register(struct isns *isns, struct isns *oldisns) 919{ 920 struct conf *conf = isns->i_conf; 921 int s; 922 char hostname[256]; 923 924 if (TAILQ_EMPTY(&conf->conf_targets) || 925 TAILQ_EMPTY(&conf->conf_portal_groups)) 926 return; 927 set_timeout(conf->conf_isns_timeout, false); 928 s = isns_do_connect(isns); 929 if (s < 0) { 930 set_timeout(0, false); 931 return; 932 } 933 gethostname(hostname, sizeof(hostname)); 934 935 if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets)) 936 oldisns = isns; 937 isns_do_deregister(oldisns, s, hostname); 938 isns_do_register(isns, s, hostname); 939 close(s); 940 set_timeout(0, false); 941} 942 943void 944isns_check(struct isns *isns) 945{ 946 struct conf *conf = isns->i_conf; 947 int s, res; 948 char hostname[256]; 949 950 if (TAILQ_EMPTY(&conf->conf_targets) || 951 TAILQ_EMPTY(&conf->conf_portal_groups)) 952 return; 953 set_timeout(conf->conf_isns_timeout, false); 954 s = isns_do_connect(isns); 955 if (s < 0) { 956 set_timeout(0, false); 957 return; 958 } 959 gethostname(hostname, sizeof(hostname)); 960 961 res = isns_do_check(isns, s, hostname); 962 if (res < 0) { 963 isns_do_deregister(isns, s, hostname); 964 isns_do_register(isns, s, hostname); 965 } 966 close(s); 967 set_timeout(0, false); 968} 969 970void 971isns_deregister(struct isns *isns) 972{ 973 struct conf *conf = isns->i_conf; 974 int s; 975 char hostname[256]; 976 977 if (TAILQ_EMPTY(&conf->conf_targets) || 978 TAILQ_EMPTY(&conf->conf_portal_groups)) 979 return; 980 set_timeout(conf->conf_isns_timeout, false); 981 s = isns_do_connect(isns); 982 if (s < 0) 983 return; 984 gethostname(hostname, sizeof(hostname)); 985 986 isns_do_deregister(isns, s, hostname); 987 close(s); 988 set_timeout(0, false); 989} 990 991int 992portal_group_set_filter(struct portal_group *pg, const char *str) 993{ 994 int filter; 995 996 if (strcmp(str, "none") == 0) { 997 filter = PG_FILTER_NONE; 998 } else if (strcmp(str, "portal") == 0) { 999 filter = PG_FILTER_PORTAL; 1000 } else if (strcmp(str, "portal-name") == 0) { 1001 filter = PG_FILTER_PORTAL_NAME; 1002 } else if (strcmp(str, "portal-name-auth") == 0) { 1003 filter = PG_FILTER_PORTAL_NAME_AUTH; 1004 } else { 1005 log_warnx("invalid discovery-filter \"%s\" for portal-group " 1006 "\"%s\"; valid values are \"none\", \"portal\", " 1007 "\"portal-name\", and \"portal-name-auth\"", 1008 str, pg->pg_name); 1009 return (1); 1010 } 1011 1012 if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN && 1013 pg->pg_discovery_filter != filter) { 1014 log_warnx("cannot set discovery-filter to \"%s\" for " 1015 "portal-group \"%s\"; already has a different " 1016 "value", str, pg->pg_name); 1017 return (1); 1018 } 1019 1020 pg->pg_discovery_filter = filter; 1021 1022 return (0); 1023} 1024 1025int 1026portal_group_set_redirection(struct portal_group *pg, const char *addr) 1027{ 1028 1029 if (pg->pg_redirection != NULL) { 1030 log_warnx("cannot set redirection to \"%s\" for " 1031 "portal-group \"%s\"; already defined", 1032 addr, pg->pg_name); 1033 return (1); 1034 } 1035 1036 pg->pg_redirection = checked_strdup(addr); 1037 1038 return (0); 1039} 1040 1041static bool 1042valid_hex(const char ch) 1043{ 1044 switch (ch) { 1045 case '0': 1046 case '1': 1047 case '2': 1048 case '3': 1049 case '4': 1050 case '5': 1051 case '6': 1052 case '7': 1053 case '8': 1054 case '9': 1055 case 'a': 1056 case 'A': 1057 case 'b': 1058 case 'B': 1059 case 'c': 1060 case 'C': 1061 case 'd': 1062 case 'D': 1063 case 'e': 1064 case 'E': 1065 case 'f': 1066 case 'F': 1067 return (true); 1068 default: 1069 return (false); 1070 } 1071} 1072 1073bool 1074valid_iscsi_name(const char *name) 1075{ 1076 int i; 1077 1078 if (strlen(name) >= MAX_NAME_LEN) { 1079 log_warnx("overlong name for target \"%s\"; max length allowed " 1080 "by iSCSI specification is %d characters", 1081 name, MAX_NAME_LEN); 1082 return (false); 1083 } 1084 1085 /* 1086 * In the cases below, we don't return an error, just in case the admin 1087 * was right, and we're wrong. 1088 */ 1089 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) { 1090 for (i = strlen("iqn."); name[i] != '\0'; i++) { 1091 /* 1092 * XXX: We should verify UTF-8 normalisation, as defined 1093 * by 3.2.6.2: iSCSI Name Encoding. 1094 */ 1095 if (isalnum(name[i])) 1096 continue; 1097 if (name[i] == '-' || name[i] == '.' || name[i] == ':') 1098 continue; 1099 log_warnx("invalid character \"%c\" in target name " 1100 "\"%s\"; allowed characters are letters, digits, " 1101 "'-', '.', and ':'", name[i], name); 1102 break; 1103 } 1104 /* 1105 * XXX: Check more stuff: valid date and a valid reversed domain. 1106 */ 1107 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) { 1108 if (strlen(name) != strlen("eui.") + 16) 1109 log_warnx("invalid target name \"%s\"; the \"eui.\" " 1110 "should be followed by exactly 16 hexadecimal " 1111 "digits", name); 1112 for (i = strlen("eui."); name[i] != '\0'; i++) { 1113 if (!valid_hex(name[i])) { 1114 log_warnx("invalid character \"%c\" in target " 1115 "name \"%s\"; allowed characters are 1-9 " 1116 "and A-F", name[i], name); 1117 break; 1118 } 1119 } 1120 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) { 1121 if (strlen(name) > strlen("naa.") + 32) 1122 log_warnx("invalid target name \"%s\"; the \"naa.\" " 1123 "should be followed by at most 32 hexadecimal " 1124 "digits", name); 1125 for (i = strlen("naa."); name[i] != '\0'; i++) { 1126 if (!valid_hex(name[i])) { 1127 log_warnx("invalid character \"%c\" in target " 1128 "name \"%s\"; allowed characters are 1-9 " 1129 "and A-F", name[i], name); 1130 break; 1131 } 1132 } 1133 } else { 1134 log_warnx("invalid target name \"%s\"; should start with " 1135 "either \"iqn.\", \"eui.\", or \"naa.\"", 1136 name); 1137 } 1138 return (true); 1139} 1140 1141struct pport * 1142pport_new(struct conf *conf, const char *name, uint32_t ctl_port) 1143{ 1144 struct pport *pp; 1145 1146 pp = calloc(1, sizeof(*pp)); 1147 if (pp == NULL) 1148 log_err(1, "calloc"); 1149 pp->pp_conf = conf; 1150 pp->pp_name = checked_strdup(name); 1151 pp->pp_ctl_port = ctl_port; 1152 TAILQ_INIT(&pp->pp_ports); 1153 TAILQ_INSERT_TAIL(&conf->conf_pports, pp, pp_next); 1154 return (pp); 1155} 1156 1157struct pport * 1158pport_find(const struct conf *conf, const char *name) 1159{ 1160 struct pport *pp; 1161 1162 TAILQ_FOREACH(pp, &conf->conf_pports, pp_next) { 1163 if (strcasecmp(pp->pp_name, name) == 0) 1164 return (pp); 1165 } 1166 return (NULL); 1167} 1168 1169struct pport * 1170pport_copy(struct pport *pp, struct conf *conf) 1171{ 1172 struct pport *ppnew; 1173 1174 ppnew = pport_new(conf, pp->pp_name, pp->pp_ctl_port); 1175 return (ppnew); 1176} 1177 1178void 1179pport_delete(struct pport *pp) 1180{ 1181 struct port *port, *tport; 1182 1183 TAILQ_FOREACH_SAFE(port, &pp->pp_ports, p_ts, tport) 1184 port_delete(port); 1185 TAILQ_REMOVE(&pp->pp_conf->conf_pports, pp, pp_next); 1186 free(pp->pp_name); 1187 free(pp); 1188} 1189 1190struct port * 1191port_new(struct conf *conf, struct target *target, struct portal_group *pg) 1192{ 1193 struct port *port; 1194 char *name; 1195 int ret; 1196 1197 ret = asprintf(&name, "%s-%s", pg->pg_name, target->t_name); 1198 if (ret <= 0) 1199 log_err(1, "asprintf"); 1200 if (port_find(conf, name) != NULL) { 1201 log_warnx("duplicate port \"%s\"", name); 1202 free(name); 1203 return (NULL); 1204 } 1205 port = calloc(1, sizeof(*port)); 1206 if (port == NULL) 1207 log_err(1, "calloc"); 1208 port->p_conf = conf; 1209 port->p_name = name; 1210 TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next); 1211 TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts); 1212 port->p_target = target; 1213 TAILQ_INSERT_TAIL(&pg->pg_ports, port, p_pgs); 1214 port->p_portal_group = pg; 1215 return (port); 1216} 1217 1218struct port * 1219port_new_pp(struct conf *conf, struct target *target, struct pport *pp) 1220{ 1221 struct port *port; 1222 char *name; 1223 int ret; 1224 1225 ret = asprintf(&name, "%s-%s", pp->pp_name, target->t_name); 1226 if (ret <= 0) 1227 log_err(1, "asprintf"); 1228 if (port_find(conf, name) != NULL) { 1229 log_warnx("duplicate port \"%s\"", name); 1230 free(name); 1231 return (NULL); 1232 } 1233 port = calloc(1, sizeof(*port)); 1234 if (port == NULL) 1235 log_err(1, "calloc"); 1236 port->p_conf = conf; 1237 port->p_name = name; 1238 TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next); 1239 TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts); 1240 port->p_target = target; 1241 TAILQ_INSERT_TAIL(&pp->pp_ports, port, p_pps); 1242 port->p_pport = pp; 1243 return (port); 1244} 1245 1246struct port * 1247port_find(const struct conf *conf, const char *name) 1248{ 1249 struct port *port; 1250 1251 TAILQ_FOREACH(port, &conf->conf_ports, p_next) { 1252 if (strcasecmp(port->p_name, name) == 0) 1253 return (port); 1254 } 1255 1256 return (NULL); 1257} 1258 1259struct port * 1260port_find_in_pg(const struct portal_group *pg, const char *target) 1261{ 1262 struct port *port; 1263 1264 TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) { 1265 if (strcasecmp(port->p_target->t_name, target) == 0) 1266 return (port); 1267 } 1268 1269 return (NULL); 1270} 1271 1272void 1273port_delete(struct port *port) 1274{ 1275 1276 if (port->p_portal_group) 1277 TAILQ_REMOVE(&port->p_portal_group->pg_ports, port, p_pgs); 1278 if (port->p_pport) 1279 TAILQ_REMOVE(&port->p_pport->pp_ports, port, p_pps); 1280 if (port->p_target) 1281 TAILQ_REMOVE(&port->p_target->t_ports, port, p_ts); 1282 TAILQ_REMOVE(&port->p_conf->conf_ports, port, p_next); 1283 free(port->p_name); 1284 free(port); 1285} 1286 1287struct target * 1288target_new(struct conf *conf, const char *name) 1289{ 1290 struct target *targ; 1291 int i, len; 1292 1293 targ = target_find(conf, name); 1294 if (targ != NULL) { 1295 log_warnx("duplicated target \"%s\"", name); 1296 return (NULL); 1297 } 1298 if (valid_iscsi_name(name) == false) { 1299 log_warnx("target name \"%s\" is invalid", name); 1300 return (NULL); 1301 } 1302 targ = calloc(1, sizeof(*targ)); 1303 if (targ == NULL) 1304 log_err(1, "calloc"); 1305 targ->t_name = checked_strdup(name); 1306 1307 /* 1308 * RFC 3722 requires us to normalize the name to lowercase. 1309 */ 1310 len = strlen(name); 1311 for (i = 0; i < len; i++) 1312 targ->t_name[i] = tolower(targ->t_name[i]); 1313 1314 targ->t_conf = conf; 1315 TAILQ_INIT(&targ->t_ports); 1316 TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next); 1317 1318 return (targ); 1319} 1320 1321void 1322target_delete(struct target *targ) 1323{ 1324 struct port *port, *tport; 1325 1326 TAILQ_FOREACH_SAFE(port, &targ->t_ports, p_ts, tport) 1327 port_delete(port); 1328 TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next); 1329 1330 free(targ->t_name); 1331 free(targ->t_redirection); 1332 free(targ); 1333} 1334 1335struct target * 1336target_find(struct conf *conf, const char *name) 1337{ 1338 struct target *targ; 1339 1340 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1341 if (strcasecmp(targ->t_name, name) == 0) 1342 return (targ); 1343 } 1344 1345 return (NULL); 1346} 1347 1348int 1349target_set_redirection(struct target *target, const char *addr) 1350{ 1351 1352 if (target->t_redirection != NULL) { 1353 log_warnx("cannot set redirection to \"%s\" for " 1354 "target \"%s\"; already defined", 1355 addr, target->t_name); 1356 return (1); 1357 } 1358 1359 target->t_redirection = checked_strdup(addr); 1360 1361 return (0); 1362} 1363 1364struct lun * 1365lun_new(struct conf *conf, const char *name) 1366{ 1367 struct lun *lun; 1368 1369 lun = lun_find(conf, name); 1370 if (lun != NULL) { 1371 log_warnx("duplicated lun \"%s\"", name); 1372 return (NULL); 1373 } 1374 1375 lun = calloc(1, sizeof(*lun)); 1376 if (lun == NULL) 1377 log_err(1, "calloc"); 1378 lun->l_conf = conf; 1379 lun->l_name = checked_strdup(name); 1380 TAILQ_INIT(&lun->l_options); 1381 TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next); 1382 1383 return (lun); 1384} 1385 1386void 1387lun_delete(struct lun *lun) 1388{ 1389 struct target *targ; 1390 struct lun_option *lo, *tmp; 1391 int i; 1392 1393 TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) { 1394 for (i = 0; i < MAX_LUNS; i++) { 1395 if (targ->t_luns[i] == lun) 1396 targ->t_luns[i] = NULL; 1397 } 1398 } 1399 TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next); 1400 1401 TAILQ_FOREACH_SAFE(lo, &lun->l_options, lo_next, tmp) 1402 lun_option_delete(lo); 1403 free(lun->l_name); 1404 free(lun->l_backend); 1405 free(lun->l_device_id); 1406 free(lun->l_path); 1407 free(lun->l_scsiname); 1408 free(lun->l_serial); 1409 free(lun); 1410} 1411 1412struct lun * 1413lun_find(const struct conf *conf, const char *name) 1414{ 1415 struct lun *lun; 1416 1417 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1418 if (strcmp(lun->l_name, name) == 0) 1419 return (lun); 1420 } 1421 1422 return (NULL); 1423} 1424 1425void 1426lun_set_backend(struct lun *lun, const char *value) 1427{ 1428 free(lun->l_backend); 1429 lun->l_backend = checked_strdup(value); 1430} 1431 1432void 1433lun_set_blocksize(struct lun *lun, size_t value) 1434{ 1435 1436 lun->l_blocksize = value; 1437} 1438 1439void 1440lun_set_device_id(struct lun *lun, const char *value) 1441{ 1442 free(lun->l_device_id); 1443 lun->l_device_id = checked_strdup(value); 1444} 1445 1446void 1447lun_set_path(struct lun *lun, const char *value) 1448{ 1449 free(lun->l_path); 1450 lun->l_path = checked_strdup(value); 1451} 1452 1453void 1454lun_set_scsiname(struct lun *lun, const char *value) 1455{ 1456 free(lun->l_scsiname); 1457 lun->l_scsiname = checked_strdup(value); 1458} 1459 1460void 1461lun_set_serial(struct lun *lun, const char *value) 1462{ 1463 free(lun->l_serial); 1464 lun->l_serial = checked_strdup(value); 1465} 1466 1467void 1468lun_set_size(struct lun *lun, size_t value) 1469{ 1470 1471 lun->l_size = value; 1472} 1473 1474void 1475lun_set_ctl_lun(struct lun *lun, uint32_t value) 1476{ 1477 1478 lun->l_ctl_lun = value; 1479} 1480 1481struct lun_option * 1482lun_option_new(struct lun *lun, const char *name, const char *value) 1483{ 1484 struct lun_option *lo; 1485 1486 lo = lun_option_find(lun, name); 1487 if (lo != NULL) { 1488 log_warnx("duplicated lun option \"%s\" for lun \"%s\"", 1489 name, lun->l_name); 1490 return (NULL); 1491 } 1492 1493 lo = calloc(1, sizeof(*lo)); 1494 if (lo == NULL) 1495 log_err(1, "calloc"); 1496 lo->lo_name = checked_strdup(name); 1497 lo->lo_value = checked_strdup(value); 1498 lo->lo_lun = lun; 1499 TAILQ_INSERT_TAIL(&lun->l_options, lo, lo_next); 1500 1501 return (lo); 1502} 1503 1504void 1505lun_option_delete(struct lun_option *lo) 1506{ 1507 1508 TAILQ_REMOVE(&lo->lo_lun->l_options, lo, lo_next); 1509 1510 free(lo->lo_name); 1511 free(lo->lo_value); 1512 free(lo); 1513} 1514 1515struct lun_option * 1516lun_option_find(const struct lun *lun, const char *name) 1517{ 1518 struct lun_option *lo; 1519 1520 TAILQ_FOREACH(lo, &lun->l_options, lo_next) { 1521 if (strcmp(lo->lo_name, name) == 0) 1522 return (lo); 1523 } 1524 1525 return (NULL); 1526} 1527 1528void 1529lun_option_set(struct lun_option *lo, const char *value) 1530{ 1531 1532 free(lo->lo_value); 1533 lo->lo_value = checked_strdup(value); 1534} 1535 1536static struct connection * 1537connection_new(struct portal *portal, int fd, const char *host, 1538 const struct sockaddr *client_sa) 1539{ 1540 struct connection *conn; 1541 1542 conn = calloc(1, sizeof(*conn)); 1543 if (conn == NULL) 1544 log_err(1, "calloc"); 1545 conn->conn_portal = portal; 1546 conn->conn_socket = fd; 1547 conn->conn_initiator_addr = checked_strdup(host); 1548 memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len); 1549 1550 /* 1551 * Default values, from RFC 3720, section 12. 1552 */ 1553 conn->conn_max_data_segment_length = 8192; 1554 conn->conn_max_burst_length = 262144; 1555 conn->conn_immediate_data = true; 1556 1557 return (conn); 1558} 1559 1560#if 0 1561static void 1562conf_print(struct conf *conf) 1563{ 1564 struct auth_group *ag; 1565 struct auth *auth; 1566 struct auth_name *auth_name; 1567 struct auth_portal *auth_portal; 1568 struct portal_group *pg; 1569 struct portal *portal; 1570 struct target *targ; 1571 struct lun *lun; 1572 struct lun_option *lo; 1573 1574 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1575 fprintf(stderr, "auth-group %s {\n", ag->ag_name); 1576 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) 1577 fprintf(stderr, "\t chap-mutual %s %s %s %s\n", 1578 auth->a_user, auth->a_secret, 1579 auth->a_mutual_user, auth->a_mutual_secret); 1580 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) 1581 fprintf(stderr, "\t initiator-name %s\n", 1582 auth_name->an_initator_name); 1583 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next) 1584 fprintf(stderr, "\t initiator-portal %s\n", 1585 auth_portal->an_initator_portal); 1586 fprintf(stderr, "}\n"); 1587 } 1588 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1589 fprintf(stderr, "portal-group %s {\n", pg->pg_name); 1590 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 1591 fprintf(stderr, "\t listen %s\n", portal->p_listen); 1592 fprintf(stderr, "}\n"); 1593 } 1594 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1595 fprintf(stderr, "\tlun %s {\n", lun->l_name); 1596 fprintf(stderr, "\t\tpath %s\n", lun->l_path); 1597 TAILQ_FOREACH(lo, &lun->l_options, lo_next) 1598 fprintf(stderr, "\t\toption %s %s\n", 1599 lo->lo_name, lo->lo_value); 1600 fprintf(stderr, "\t}\n"); 1601 } 1602 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1603 fprintf(stderr, "target %s {\n", targ->t_name); 1604 if (targ->t_alias != NULL) 1605 fprintf(stderr, "\t alias %s\n", targ->t_alias); 1606 fprintf(stderr, "}\n"); 1607 } 1608} 1609#endif 1610 1611static int 1612conf_verify_lun(struct lun *lun) 1613{ 1614 const struct lun *lun2; 1615 1616 if (lun->l_backend == NULL) 1617 lun_set_backend(lun, "block"); 1618 if (strcmp(lun->l_backend, "block") == 0) { 1619 if (lun->l_path == NULL) { 1620 log_warnx("missing path for lun \"%s\"", 1621 lun->l_name); 1622 return (1); 1623 } 1624 } else if (strcmp(lun->l_backend, "ramdisk") == 0) { 1625 if (lun->l_size == 0) { 1626 log_warnx("missing size for ramdisk-backed lun \"%s\"", 1627 lun->l_name); 1628 return (1); 1629 } 1630 if (lun->l_path != NULL) { 1631 log_warnx("path must not be specified " 1632 "for ramdisk-backed lun \"%s\"", 1633 lun->l_name); 1634 return (1); 1635 } 1636 } 1637 if (lun->l_blocksize == 0) { 1638 lun_set_blocksize(lun, DEFAULT_BLOCKSIZE); 1639 } else if (lun->l_blocksize < 0) { 1640 log_warnx("invalid blocksize for lun \"%s\"; " 1641 "must be larger than 0", lun->l_name); 1642 return (1); 1643 } 1644 if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) { 1645 log_warnx("invalid size for lun \"%s\"; " 1646 "must be multiple of blocksize", lun->l_name); 1647 return (1); 1648 } 1649 TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) { 1650 if (lun == lun2) 1651 continue; 1652 if (lun->l_path != NULL && lun2->l_path != NULL && 1653 strcmp(lun->l_path, lun2->l_path) == 0) { 1654 log_debugx("WARNING: path \"%s\" duplicated " 1655 "between lun \"%s\", and " 1656 "lun \"%s\"", lun->l_path, 1657 lun->l_name, lun2->l_name); 1658 } 1659 } 1660 1661 return (0); 1662} 1663 1664int 1665conf_verify(struct conf *conf) 1666{ 1667 struct auth_group *ag; 1668 struct portal_group *pg; 1669 struct port *port; 1670 struct target *targ; 1671 struct lun *lun; 1672 bool found; 1673 int error, i; 1674 1675 if (conf->conf_pidfile_path == NULL) 1676 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE); 1677 1678 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) { 1679 error = conf_verify_lun(lun); 1680 if (error != 0) 1681 return (error); 1682 } 1683 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1684 if (targ->t_auth_group == NULL) { 1685 targ->t_auth_group = auth_group_find(conf, 1686 "default"); 1687 assert(targ->t_auth_group != NULL); 1688 } 1689 if (TAILQ_EMPTY(&targ->t_ports)) { 1690 pg = portal_group_find(conf, "default"); 1691 assert(pg != NULL); 1692 port_new(conf, targ, pg); 1693 } 1694 found = false; 1695 for (i = 0; i < MAX_LUNS; i++) { 1696 if (targ->t_luns[i] != NULL) 1697 found = true; 1698 } 1699 if (!found && targ->t_redirection == NULL) { 1700 log_warnx("no LUNs defined for target \"%s\"", 1701 targ->t_name); 1702 } 1703 if (found && targ->t_redirection != NULL) { 1704 log_debugx("target \"%s\" contains luns, " 1705 " but configured for redirection", 1706 targ->t_name); 1707 } 1708 } 1709 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1710 assert(pg->pg_name != NULL); 1711 if (pg->pg_discovery_auth_group == NULL) { 1712 pg->pg_discovery_auth_group = 1713 auth_group_find(conf, "default"); 1714 assert(pg->pg_discovery_auth_group != NULL); 1715 } 1716 1717 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN) 1718 pg->pg_discovery_filter = PG_FILTER_NONE; 1719 1720 if (!TAILQ_EMPTY(&pg->pg_ports)) { 1721 if (pg->pg_redirection != NULL) { 1722 log_debugx("portal-group \"%s\" assigned " 1723 "to target, but configured " 1724 "for redirection", 1725 pg->pg_name); 1726 } 1727 pg->pg_unassigned = false; 1728 } else { 1729 if (strcmp(pg->pg_name, "default") != 0) 1730 log_warnx("portal-group \"%s\" not assigned " 1731 "to any target", pg->pg_name); 1732 pg->pg_unassigned = true; 1733 } 1734 } 1735 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1736 if (ag->ag_name == NULL) 1737 assert(ag->ag_target != NULL); 1738 else 1739 assert(ag->ag_target == NULL); 1740 1741 found = false; 1742 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1743 if (targ->t_auth_group == ag) { 1744 found = true; 1745 break; 1746 } 1747 } 1748 TAILQ_FOREACH(port, &conf->conf_ports, p_next) { 1749 if (port->p_auth_group == ag) { 1750 found = true; 1751 break; 1752 } 1753 } 1754 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1755 if (pg->pg_discovery_auth_group == ag) { 1756 found = true; 1757 break; 1758 } 1759 } 1760 if (!found && ag->ag_name != NULL && 1761 strcmp(ag->ag_name, "default") != 0 && 1762 strcmp(ag->ag_name, "no-authentication") != 0 && 1763 strcmp(ag->ag_name, "no-access") != 0) { 1764 log_warnx("auth-group \"%s\" not assigned " 1765 "to any target", ag->ag_name); 1766 } 1767 } 1768 1769 return (0); 1770} 1771 1772static int 1773conf_apply(struct conf *oldconf, struct conf *newconf) 1774{ 1775 struct lun *oldlun, *newlun, *tmplun; 1776 struct portal_group *oldpg, *newpg; 1777 struct portal *oldp, *newp; 1778 struct port *oldport, *newport, *tmpport; 1779 struct isns *oldns, *newns; 1780 pid_t otherpid; 1781 int changed, cumulated_error = 0, error, sockbuf; 1782 int one = 1; 1783 1784 if (oldconf->conf_debug != newconf->conf_debug) { 1785 log_debugx("changing debug level to %d", newconf->conf_debug); 1786 log_init(newconf->conf_debug); 1787 } 1788 1789 if (oldconf->conf_pidfh != NULL) { 1790 assert(oldconf->conf_pidfile_path != NULL); 1791 if (newconf->conf_pidfile_path != NULL && 1792 strcmp(oldconf->conf_pidfile_path, 1793 newconf->conf_pidfile_path) == 0) { 1794 newconf->conf_pidfh = oldconf->conf_pidfh; 1795 oldconf->conf_pidfh = NULL; 1796 } else { 1797 log_debugx("removing pidfile %s", 1798 oldconf->conf_pidfile_path); 1799 pidfile_remove(oldconf->conf_pidfh); 1800 oldconf->conf_pidfh = NULL; 1801 } 1802 } 1803 1804 if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) { 1805 log_debugx("opening pidfile %s", newconf->conf_pidfile_path); 1806 newconf->conf_pidfh = 1807 pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid); 1808 if (newconf->conf_pidfh == NULL) { 1809 if (errno == EEXIST) 1810 log_errx(1, "daemon already running, pid: %jd.", 1811 (intmax_t)otherpid); 1812 log_err(1, "cannot open or create pidfile \"%s\"", 1813 newconf->conf_pidfile_path); 1814 } 1815 } 1816 1817 /* 1818 * Go through the new portal groups, assigning tags or preserving old. 1819 */ 1820 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 1821 oldpg = portal_group_find(oldconf, newpg->pg_name); 1822 if (oldpg != NULL) 1823 newpg->pg_tag = oldpg->pg_tag; 1824 else 1825 newpg->pg_tag = ++last_portal_group_tag; 1826 } 1827 1828 /* Deregister on removed iSNS servers. */ 1829 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) { 1830 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) { 1831 if (strcmp(oldns->i_addr, newns->i_addr) == 0) 1832 break; 1833 } 1834 if (newns == NULL) 1835 isns_deregister(oldns); 1836 } 1837 1838 /* 1839 * XXX: If target or lun removal fails, we should somehow "move" 1840 * the old lun or target into newconf, so that subsequent 1841 * conf_apply() would try to remove them again. That would 1842 * be somewhat hairy, though, and lun deletion failures don't 1843 * really happen, so leave it as it is for now. 1844 */ 1845 /* 1846 * First, remove any ports present in the old configuration 1847 * and missing in the new one. 1848 */ 1849 TAILQ_FOREACH_SAFE(oldport, &oldconf->conf_ports, p_next, tmpport) { 1850 newport = port_find(newconf, oldport->p_name); 1851 if (newport != NULL) 1852 continue; 1853 log_debugx("removing port \"%s\"", oldport->p_name); 1854 error = kernel_port_remove(oldport); 1855 if (error != 0) { 1856 log_warnx("failed to remove port %s", 1857 oldport->p_name); 1858 /* 1859 * XXX: Uncomment after fixing the root cause. 1860 * 1861 * cumulated_error++; 1862 */ 1863 } 1864 } 1865 1866 /* 1867 * Second, remove any LUNs present in the old configuration 1868 * and missing in the new one. 1869 */ 1870 TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) { 1871 newlun = lun_find(newconf, oldlun->l_name); 1872 if (newlun == NULL) { 1873 log_debugx("lun \"%s\", CTL lun %d " 1874 "not found in new configuration; " 1875 "removing", oldlun->l_name, oldlun->l_ctl_lun); 1876 error = kernel_lun_remove(oldlun); 1877 if (error != 0) { 1878 log_warnx("failed to remove lun \"%s\", " 1879 "CTL lun %d", 1880 oldlun->l_name, oldlun->l_ctl_lun); 1881 cumulated_error++; 1882 } 1883 continue; 1884 } 1885 1886 /* 1887 * Also remove the LUNs changed by more than size. 1888 */ 1889 changed = 0; 1890 assert(oldlun->l_backend != NULL); 1891 assert(newlun->l_backend != NULL); 1892 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) { 1893 log_debugx("backend for lun \"%s\", " 1894 "CTL lun %d changed; removing", 1895 oldlun->l_name, oldlun->l_ctl_lun); 1896 changed = 1; 1897 } 1898 if (oldlun->l_blocksize != newlun->l_blocksize) { 1899 log_debugx("blocksize for lun \"%s\", " 1900 "CTL lun %d changed; removing", 1901 oldlun->l_name, oldlun->l_ctl_lun); 1902 changed = 1; 1903 } 1904 if (newlun->l_device_id != NULL && 1905 (oldlun->l_device_id == NULL || 1906 strcmp(oldlun->l_device_id, newlun->l_device_id) != 1907 0)) { 1908 log_debugx("device-id for lun \"%s\", " 1909 "CTL lun %d changed; removing", 1910 oldlun->l_name, oldlun->l_ctl_lun); 1911 changed = 1; 1912 } 1913 if (newlun->l_path != NULL && 1914 (oldlun->l_path == NULL || 1915 strcmp(oldlun->l_path, newlun->l_path) != 0)) { 1916 log_debugx("path for lun \"%s\", " 1917 "CTL lun %d, changed; removing", 1918 oldlun->l_name, oldlun->l_ctl_lun); 1919 changed = 1; 1920 } 1921 if (newlun->l_serial != NULL && 1922 (oldlun->l_serial == NULL || 1923 strcmp(oldlun->l_serial, newlun->l_serial) != 0)) { 1924 log_debugx("serial for lun \"%s\", " 1925 "CTL lun %d changed; removing", 1926 oldlun->l_name, oldlun->l_ctl_lun); 1927 changed = 1; 1928 } 1929 if (changed) { 1930 error = kernel_lun_remove(oldlun); 1931 if (error != 0) { 1932 log_warnx("failed to remove lun \"%s\", " 1933 "CTL lun %d", 1934 oldlun->l_name, oldlun->l_ctl_lun); 1935 cumulated_error++; 1936 } 1937 lun_delete(oldlun); 1938 continue; 1939 } 1940 1941 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun); 1942 } 1943 1944 TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) { 1945 oldlun = lun_find(oldconf, newlun->l_name); 1946 if (oldlun != NULL) { 1947 log_debugx("modifying lun \"%s\", CTL lun %d", 1948 newlun->l_name, newlun->l_ctl_lun); 1949 error = kernel_lun_modify(newlun); 1950 if (error != 0) { 1951 log_warnx("failed to " 1952 "modify lun \"%s\", CTL lun %d", 1953 newlun->l_name, newlun->l_ctl_lun); 1954 cumulated_error++; 1955 } 1956 continue; 1957 } 1958 log_debugx("adding lun \"%s\"", newlun->l_name); 1959 error = kernel_lun_add(newlun); 1960 if (error != 0) { 1961 log_warnx("failed to add lun \"%s\"", newlun->l_name); 1962 lun_delete(newlun); 1963 cumulated_error++; 1964 } 1965 } 1966 1967 /* 1968 * Now add new ports or modify existing ones. 1969 */ 1970 TAILQ_FOREACH(newport, &newconf->conf_ports, p_next) { 1971 oldport = port_find(oldconf, newport->p_name); 1972 1973 if (oldport == NULL) { 1974 log_debugx("adding port \"%s\"", newport->p_name); 1975 error = kernel_port_add(newport); 1976 } else { 1977 log_debugx("updating port \"%s\"", newport->p_name); 1978 newport->p_ctl_port = oldport->p_ctl_port; 1979 error = kernel_port_update(newport); 1980 } 1981 if (error != 0) { 1982 log_warnx("failed to %s port %s", 1983 (oldport == NULL) ? "add" : "update", 1984 newport->p_name); 1985 /* 1986 * XXX: Uncomment after fixing the root cause. 1987 * 1988 * cumulated_error++; 1989 */ 1990 } 1991 } 1992 1993 /* 1994 * Go through the new portals, opening the sockets as neccessary. 1995 */ 1996 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 1997 if (newpg->pg_unassigned) { 1998 log_debugx("not listening on portal-group \"%s\", " 1999 "not assigned to any target", 2000 newpg->pg_name); 2001 continue; 2002 } 2003 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) { 2004 /* 2005 * Try to find already open portal and reuse 2006 * the listening socket. We don't care about 2007 * what portal or portal group that was, what 2008 * matters is the listening address. 2009 */ 2010 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, 2011 pg_next) { 2012 TAILQ_FOREACH(oldp, &oldpg->pg_portals, 2013 p_next) { 2014 if (strcmp(newp->p_listen, 2015 oldp->p_listen) == 0 && 2016 oldp->p_socket > 0) { 2017 newp->p_socket = 2018 oldp->p_socket; 2019 oldp->p_socket = 0; 2020 break; 2021 } 2022 } 2023 } 2024 if (newp->p_socket > 0) { 2025 /* 2026 * We're done with this portal. 2027 */ 2028 continue; 2029 } 2030 2031#ifdef ICL_KERNEL_PROXY 2032 if (proxy_mode) { 2033 newpg->pg_conf->conf_portal_id++; 2034 newp->p_id = newpg->pg_conf->conf_portal_id; 2035 log_debugx("listening on %s, portal-group " 2036 "\"%s\", portal id %d, using ICL proxy", 2037 newp->p_listen, newpg->pg_name, newp->p_id); 2038 kernel_listen(newp->p_ai, newp->p_iser, 2039 newp->p_id); 2040 continue; 2041 } 2042#endif 2043 assert(proxy_mode == false); 2044 assert(newp->p_iser == false); 2045 2046 log_debugx("listening on %s, portal-group \"%s\"", 2047 newp->p_listen, newpg->pg_name); 2048 newp->p_socket = socket(newp->p_ai->ai_family, 2049 newp->p_ai->ai_socktype, 2050 newp->p_ai->ai_protocol); 2051 if (newp->p_socket < 0) { 2052 log_warn("socket(2) failed for %s", 2053 newp->p_listen); 2054 cumulated_error++; 2055 continue; 2056 } 2057 sockbuf = SOCKBUF_SIZE; 2058 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF, 2059 &sockbuf, sizeof(sockbuf)) == -1) 2060 log_warn("setsockopt(SO_RCVBUF) failed " 2061 "for %s", newp->p_listen); 2062 sockbuf = SOCKBUF_SIZE; 2063 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF, 2064 &sockbuf, sizeof(sockbuf)) == -1) 2065 log_warn("setsockopt(SO_SNDBUF) failed " 2066 "for %s", newp->p_listen); 2067 error = setsockopt(newp->p_socket, SOL_SOCKET, 2068 SO_REUSEADDR, &one, sizeof(one)); 2069 if (error != 0) { 2070 log_warn("setsockopt(SO_REUSEADDR) failed " 2071 "for %s", newp->p_listen); 2072 close(newp->p_socket); 2073 newp->p_socket = 0; 2074 cumulated_error++; 2075 continue; 2076 } 2077 error = bind(newp->p_socket, newp->p_ai->ai_addr, 2078 newp->p_ai->ai_addrlen); 2079 if (error != 0) { 2080 log_warn("bind(2) failed for %s", 2081 newp->p_listen); 2082 close(newp->p_socket); 2083 newp->p_socket = 0; 2084 cumulated_error++; 2085 continue; 2086 } 2087 error = listen(newp->p_socket, -1); 2088 if (error != 0) { 2089 log_warn("listen(2) failed for %s", 2090 newp->p_listen); 2091 close(newp->p_socket); 2092 newp->p_socket = 0; 2093 cumulated_error++; 2094 continue; 2095 } 2096 } 2097 } 2098 2099 /* 2100 * Go through the no longer used sockets, closing them. 2101 */ 2102 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) { 2103 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) { 2104 if (oldp->p_socket <= 0) 2105 continue; 2106 log_debugx("closing socket for %s, portal-group \"%s\"", 2107 oldp->p_listen, oldpg->pg_name); 2108 close(oldp->p_socket); 2109 oldp->p_socket = 0; 2110 } 2111 } 2112 2113 /* (Re-)Register on remaining/new iSNS servers. */ 2114 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) { 2115 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) { 2116 if (strcmp(oldns->i_addr, newns->i_addr) == 0) 2117 break; 2118 } 2119 isns_register(newns, oldns); 2120 } 2121 2122 /* Schedule iSNS update */ 2123 if (!TAILQ_EMPTY(&newconf->conf_isns)) 2124 set_timeout((newconf->conf_isns_period + 2) / 3, false); 2125 2126 return (cumulated_error); 2127} 2128 2129bool 2130timed_out(void) 2131{ 2132 2133 return (sigalrm_received); 2134} 2135 2136static void 2137sigalrm_handler_fatal(int dummy __unused) 2138{ 2139 /* 2140 * It would be easiest to just log an error and exit. We can't 2141 * do this, though, because log_errx() is not signal safe, since 2142 * it calls syslog(3). Instead, set a flag checked by pdu_send() 2143 * and pdu_receive(), to call log_errx() there. Should they fail 2144 * to notice, we'll exit here one second later. 2145 */ 2146 if (sigalrm_received) { 2147 /* 2148 * Oh well. Just give up and quit. 2149 */ 2150 _exit(2); 2151 } 2152 2153 sigalrm_received = true; 2154} 2155 2156static void 2157sigalrm_handler(int dummy __unused) 2158{ 2159 2160 sigalrm_received = true; 2161} 2162 2163void 2164set_timeout(int timeout, int fatal) 2165{ 2166 struct sigaction sa; 2167 struct itimerval itv; 2168 int error; 2169 2170 if (timeout <= 0) { 2171 log_debugx("session timeout disabled"); 2172 bzero(&itv, sizeof(itv)); 2173 error = setitimer(ITIMER_REAL, &itv, NULL); 2174 if (error != 0) 2175 log_err(1, "setitimer"); 2176 sigalrm_received = false; 2177 return; 2178 } 2179 2180 sigalrm_received = false; 2181 bzero(&sa, sizeof(sa)); 2182 if (fatal) 2183 sa.sa_handler = sigalrm_handler_fatal; 2184 else 2185 sa.sa_handler = sigalrm_handler; 2186 sigfillset(&sa.sa_mask); 2187 error = sigaction(SIGALRM, &sa, NULL); 2188 if (error != 0) 2189 log_err(1, "sigaction"); 2190 2191 /* 2192 * First SIGALRM will arive after conf_timeout seconds. 2193 * If we do nothing, another one will arrive a second later. 2194 */ 2195 log_debugx("setting session timeout to %d seconds", timeout); 2196 bzero(&itv, sizeof(itv)); 2197 itv.it_interval.tv_sec = 1; 2198 itv.it_value.tv_sec = timeout; 2199 error = setitimer(ITIMER_REAL, &itv, NULL); 2200 if (error != 0) 2201 log_err(1, "setitimer"); 2202} 2203 2204static int 2205wait_for_children(bool block) 2206{ 2207 pid_t pid; 2208 int status; 2209 int num = 0; 2210 2211 for (;;) { 2212 /* 2213 * If "block" is true, wait for at least one process. 2214 */ 2215 if (block && num == 0) 2216 pid = wait4(-1, &status, 0, NULL); 2217 else 2218 pid = wait4(-1, &status, WNOHANG, NULL); 2219 if (pid <= 0) 2220 break; 2221 if (WIFSIGNALED(status)) { 2222 log_warnx("child process %d terminated with signal %d", 2223 pid, WTERMSIG(status)); 2224 } else if (WEXITSTATUS(status) != 0) { 2225 log_warnx("child process %d terminated with exit status %d", 2226 pid, WEXITSTATUS(status)); 2227 } else { 2228 log_debugx("child process %d terminated gracefully", pid); 2229 } 2230 num++; 2231 } 2232 2233 return (num); 2234} 2235 2236static void 2237handle_connection(struct portal *portal, int fd, 2238 const struct sockaddr *client_sa, bool dont_fork) 2239{ 2240 struct connection *conn; 2241 int error; 2242 pid_t pid; 2243 char host[NI_MAXHOST + 1]; 2244 struct conf *conf; 2245 2246 conf = portal->p_portal_group->pg_conf; 2247 2248 if (dont_fork) { 2249 log_debugx("incoming connection; not forking due to -d flag"); 2250 } else { 2251 nchildren -= wait_for_children(false); 2252 assert(nchildren >= 0); 2253 2254 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) { 2255 log_debugx("maxproc limit of %d child processes hit; " 2256 "waiting for child process to exit", conf->conf_maxproc); 2257 nchildren -= wait_for_children(true); 2258 assert(nchildren >= 0); 2259 } 2260 log_debugx("incoming connection; forking child process #%d", 2261 nchildren); 2262 nchildren++; 2263 pid = fork(); 2264 if (pid < 0) 2265 log_err(1, "fork"); 2266 if (pid > 0) { 2267 close(fd); 2268 return; 2269 } 2270 } 2271 pidfile_close(conf->conf_pidfh); 2272 2273 error = getnameinfo(client_sa, client_sa->sa_len, 2274 host, sizeof(host), NULL, 0, NI_NUMERICHOST); 2275 if (error != 0) 2276 log_errx(1, "getnameinfo: %s", gai_strerror(error)); 2277 2278 log_debugx("accepted connection from %s; portal group \"%s\"", 2279 host, portal->p_portal_group->pg_name); 2280 log_set_peer_addr(host); 2281 setproctitle("%s", host); 2282 2283 conn = connection_new(portal, fd, host, client_sa); 2284 set_timeout(conf->conf_timeout, true); 2285 kernel_capsicate(); 2286 login(conn); 2287 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) { 2288 kernel_handoff(conn); 2289 log_debugx("connection handed off to the kernel"); 2290 } else { 2291 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY); 2292 discovery(conn); 2293 } 2294 log_debugx("nothing more to do; exiting"); 2295 exit(0); 2296} 2297 2298static int 2299fd_add(int fd, fd_set *fdset, int nfds) 2300{ 2301 2302 /* 2303 * Skip sockets which we failed to bind. 2304 */ 2305 if (fd <= 0) 2306 return (nfds); 2307 2308 FD_SET(fd, fdset); 2309 if (fd > nfds) 2310 nfds = fd; 2311 return (nfds); 2312} 2313 2314static void 2315main_loop(struct conf *conf, bool dont_fork) 2316{ 2317 struct portal_group *pg; 2318 struct portal *portal; 2319 struct sockaddr_storage client_sa; 2320 socklen_t client_salen; 2321#ifdef ICL_KERNEL_PROXY 2322 int connection_id; 2323 int portal_id; 2324#endif 2325 fd_set fdset; 2326 int error, nfds, client_fd; 2327 2328 pidfile_write(conf->conf_pidfh); 2329 2330 for (;;) { 2331 if (sighup_received || sigterm_received || timed_out()) 2332 return; 2333 2334#ifdef ICL_KERNEL_PROXY 2335 if (proxy_mode) { 2336 client_salen = sizeof(client_sa); 2337 kernel_accept(&connection_id, &portal_id, 2338 (struct sockaddr *)&client_sa, &client_salen); 2339 assert(client_salen >= client_sa.ss_len); 2340 2341 log_debugx("incoming connection, id %d, portal id %d", 2342 connection_id, portal_id); 2343 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2344 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 2345 if (portal->p_id == portal_id) { 2346 goto found; 2347 } 2348 } 2349 } 2350 2351 log_errx(1, "kernel returned invalid portal_id %d", 2352 portal_id); 2353 2354found: 2355 handle_connection(portal, connection_id, 2356 (struct sockaddr *)&client_sa, dont_fork); 2357 } else { 2358#endif 2359 assert(proxy_mode == false); 2360 2361 FD_ZERO(&fdset); 2362 nfds = 0; 2363 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2364 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 2365 nfds = fd_add(portal->p_socket, &fdset, nfds); 2366 } 2367 error = select(nfds + 1, &fdset, NULL, NULL, NULL); 2368 if (error <= 0) { 2369 if (errno == EINTR) 2370 return; 2371 log_err(1, "select"); 2372 } 2373 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 2374 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 2375 if (!FD_ISSET(portal->p_socket, &fdset)) 2376 continue; 2377 client_salen = sizeof(client_sa); 2378 client_fd = accept(portal->p_socket, 2379 (struct sockaddr *)&client_sa, 2380 &client_salen); 2381 if (client_fd < 0) { 2382 if (errno == ECONNABORTED) 2383 continue; 2384 log_err(1, "accept"); 2385 } 2386 assert(client_salen >= client_sa.ss_len); 2387 2388 handle_connection(portal, client_fd, 2389 (struct sockaddr *)&client_sa, 2390 dont_fork); 2391 break; 2392 } 2393 } 2394#ifdef ICL_KERNEL_PROXY 2395 } 2396#endif 2397 } 2398} 2399 2400static void 2401sighup_handler(int dummy __unused) 2402{ 2403 2404 sighup_received = true; 2405} 2406 2407static void 2408sigterm_handler(int dummy __unused) 2409{ 2410 2411 sigterm_received = true; 2412} 2413 2414static void 2415sigchld_handler(int dummy __unused) 2416{ 2417 2418 /* 2419 * The only purpose of this handler is to make SIGCHLD 2420 * interrupt the ISCSIDWAIT ioctl(2), so we can call 2421 * wait_for_children(). 2422 */ 2423} 2424 2425static void 2426register_signals(void) 2427{ 2428 struct sigaction sa; 2429 int error; 2430 2431 bzero(&sa, sizeof(sa)); 2432 sa.sa_handler = sighup_handler; 2433 sigfillset(&sa.sa_mask); 2434 error = sigaction(SIGHUP, &sa, NULL); 2435 if (error != 0) 2436 log_err(1, "sigaction"); 2437 2438 sa.sa_handler = sigterm_handler; 2439 error = sigaction(SIGTERM, &sa, NULL); 2440 if (error != 0) 2441 log_err(1, "sigaction"); 2442 2443 sa.sa_handler = sigterm_handler; 2444 error = sigaction(SIGINT, &sa, NULL); 2445 if (error != 0) 2446 log_err(1, "sigaction"); 2447 2448 sa.sa_handler = sigchld_handler; 2449 error = sigaction(SIGCHLD, &sa, NULL); 2450 if (error != 0) 2451 log_err(1, "sigaction"); 2452} 2453 2454int 2455main(int argc, char **argv) 2456{ 2457 struct conf *oldconf, *newconf, *tmpconf; 2458 struct isns *newns; 2459 const char *config_path = DEFAULT_CONFIG_PATH; 2460 int debug = 0, ch, error; 2461 bool dont_daemonize = false; 2462 2463 while ((ch = getopt(argc, argv, "df:R")) != -1) { 2464 switch (ch) { 2465 case 'd': 2466 dont_daemonize = true; 2467 debug++; 2468 break; 2469 case 'f': 2470 config_path = optarg; 2471 break; 2472 case 'R': 2473#ifndef ICL_KERNEL_PROXY 2474 log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY " 2475 "does not support iSER protocol"); 2476#endif 2477 proxy_mode = true; 2478 break; 2479 case '?': 2480 default: 2481 usage(); 2482 } 2483 } 2484 argc -= optind; 2485 if (argc != 0) 2486 usage(); 2487 2488 log_init(debug); 2489 kernel_init(); 2490 2491 oldconf = conf_new_from_kernel(); 2492 newconf = conf_new_from_file(config_path, oldconf); 2493 if (newconf == NULL) 2494 log_errx(1, "configuration error; exiting"); 2495 if (debug > 0) { 2496 oldconf->conf_debug = debug; 2497 newconf->conf_debug = debug; 2498 } 2499 2500 error = conf_apply(oldconf, newconf); 2501 if (error != 0) 2502 log_errx(1, "failed to apply configuration; exiting"); 2503 2504 conf_delete(oldconf); 2505 oldconf = NULL; 2506 2507 register_signals(); 2508 2509 if (dont_daemonize == false) { 2510 log_debugx("daemonizing"); 2511 if (daemon(0, 0) == -1) { 2512 log_warn("cannot daemonize"); 2513 pidfile_remove(newconf->conf_pidfh); 2514 exit(1); 2515 } 2516 } 2517 2518 /* Schedule iSNS update */ 2519 if (!TAILQ_EMPTY(&newconf->conf_isns)) 2520 set_timeout((newconf->conf_isns_period + 2) / 3, false); 2521 2522 for (;;) { 2523 main_loop(newconf, dont_daemonize); 2524 if (sighup_received) { 2525 sighup_received = false; 2526 log_debugx("received SIGHUP, reloading configuration"); 2527 tmpconf = conf_new_from_file(config_path, newconf); 2528 if (tmpconf == NULL) { 2529 log_warnx("configuration error, " 2530 "continuing with old configuration"); 2531 } else { 2532 if (debug > 0) 2533 tmpconf->conf_debug = debug; 2534 oldconf = newconf; 2535 newconf = tmpconf; 2536 error = conf_apply(oldconf, newconf); 2537 if (error != 0) 2538 log_warnx("failed to reload " 2539 "configuration"); 2540 conf_delete(oldconf); 2541 oldconf = NULL; 2542 } 2543 } else if (sigterm_received) { 2544 log_debugx("exiting on signal; " 2545 "reloading empty configuration"); 2546 2547 log_debugx("removing CTL iSCSI ports " 2548 "and terminating all connections"); 2549 2550 oldconf = newconf; 2551 newconf = conf_new(); 2552 if (debug > 0) 2553 newconf->conf_debug = debug; 2554 error = conf_apply(oldconf, newconf); 2555 if (error != 0) 2556 log_warnx("failed to apply configuration"); 2557 conf_delete(oldconf); 2558 oldconf = NULL; 2559 2560 log_warnx("exiting on signal"); 2561 exit(0); 2562 } else { 2563 nchildren -= wait_for_children(false); 2564 assert(nchildren >= 0); 2565 if (timed_out()) { 2566 set_timeout(0, false); 2567 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) 2568 isns_check(newns); 2569 /* Schedule iSNS update */ 2570 if (!TAILQ_EMPTY(&newconf->conf_isns)) { 2571 set_timeout((newconf->conf_isns_period 2572 + 2) / 3, 2573 false); 2574 } 2575 } 2576 } 2577 } 2578 /* NOTREACHED */ 2579} 2580