ctld.c revision 265516
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 * $FreeBSD: stable/10/usr.sbin/ctld/ctld.c 265516 2014-05-07 07:41:58Z trasz $ 30 */ 31 32#include <sys/types.h> 33#include <sys/time.h> 34#include <sys/socket.h> 35#include <sys/wait.h> 36#include <netinet/in.h> 37#include <assert.h> 38#include <ctype.h> 39#include <errno.h> 40#include <netdb.h> 41#include <signal.h> 42#include <stdbool.h> 43#include <stdio.h> 44#include <stdint.h> 45#include <stdlib.h> 46#include <string.h> 47#include <unistd.h> 48 49#include "ctld.h" 50 51bool proxy_mode = false; 52 53static volatile bool sighup_received = false; 54static volatile bool sigterm_received = false; 55static volatile bool sigalrm_received = false; 56 57static int nchildren = 0; 58 59static void 60usage(void) 61{ 62 63 fprintf(stderr, "usage: ctld [-d][-f config-file]\n"); 64 exit(1); 65} 66 67char * 68checked_strdup(const char *s) 69{ 70 char *c; 71 72 c = strdup(s); 73 if (c == NULL) 74 log_err(1, "strdup"); 75 return (c); 76} 77 78struct conf * 79conf_new(void) 80{ 81 struct conf *conf; 82 83 conf = calloc(1, sizeof(*conf)); 84 if (conf == NULL) 85 log_err(1, "calloc"); 86 TAILQ_INIT(&conf->conf_targets); 87 TAILQ_INIT(&conf->conf_auth_groups); 88 TAILQ_INIT(&conf->conf_portal_groups); 89 90 conf->conf_debug = 0; 91 conf->conf_timeout = 60; 92 conf->conf_maxproc = 30; 93 94 return (conf); 95} 96 97void 98conf_delete(struct conf *conf) 99{ 100 struct target *targ, *tmp; 101 struct auth_group *ag, *cagtmp; 102 struct portal_group *pg, *cpgtmp; 103 104 assert(conf->conf_pidfh == NULL); 105 106 TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp) 107 target_delete(targ); 108 TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp) 109 auth_group_delete(ag); 110 TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp) 111 portal_group_delete(pg); 112 free(conf->conf_pidfile_path); 113 free(conf); 114} 115 116static struct auth * 117auth_new(struct auth_group *ag) 118{ 119 struct auth *auth; 120 121 auth = calloc(1, sizeof(*auth)); 122 if (auth == NULL) 123 log_err(1, "calloc"); 124 auth->a_auth_group = ag; 125 TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next); 126 return (auth); 127} 128 129static void 130auth_delete(struct auth *auth) 131{ 132 TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next); 133 134 free(auth->a_user); 135 free(auth->a_secret); 136 free(auth->a_mutual_user); 137 free(auth->a_mutual_secret); 138 free(auth); 139} 140 141const struct auth * 142auth_find(const struct auth_group *ag, const char *user) 143{ 144 const struct auth *auth; 145 146 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) { 147 if (strcmp(auth->a_user, user) == 0) 148 return (auth); 149 } 150 151 return (NULL); 152} 153 154static void 155auth_check_secret_length(struct auth *auth) 156{ 157 size_t len; 158 159 len = strlen(auth->a_secret); 160 if (len > 16) { 161 if (auth->a_auth_group->ag_name != NULL) 162 log_warnx("secret for user \"%s\", auth-group \"%s\", " 163 "is too long; it should be at most 16 characters " 164 "long", auth->a_user, auth->a_auth_group->ag_name); 165 else 166 log_warnx("secret for user \"%s\", target \"%s\", " 167 "is too long; it should be at most 16 characters " 168 "long", auth->a_user, 169 auth->a_auth_group->ag_target->t_name); 170 } 171 if (len < 12) { 172 if (auth->a_auth_group->ag_name != NULL) 173 log_warnx("secret for user \"%s\", auth-group \"%s\", " 174 "is too short; it should be at least 12 characters " 175 "long", auth->a_user, 176 auth->a_auth_group->ag_name); 177 else 178 log_warnx("secret for user \"%s\", target \"%s\", " 179 "is too short; it should be at least 16 characters " 180 "long", auth->a_user, 181 auth->a_auth_group->ag_target->t_name); 182 } 183 184 if (auth->a_mutual_secret != NULL) { 185 len = strlen(auth->a_secret); 186 if (len > 16) { 187 if (auth->a_auth_group->ag_name != NULL) 188 log_warnx("mutual secret for user \"%s\", " 189 "auth-group \"%s\", is too long; it should " 190 "be at most 16 characters long", 191 auth->a_user, auth->a_auth_group->ag_name); 192 else 193 log_warnx("mutual secret for user \"%s\", " 194 "target \"%s\", is too long; it should " 195 "be at most 16 characters long", 196 auth->a_user, 197 auth->a_auth_group->ag_target->t_name); 198 } 199 if (len < 12) { 200 if (auth->a_auth_group->ag_name != NULL) 201 log_warnx("mutual secret for user \"%s\", " 202 "auth-group \"%s\", is too short; it " 203 "should be at least 12 characters long", 204 auth->a_user, auth->a_auth_group->ag_name); 205 else 206 log_warnx("mutual secret for user \"%s\", " 207 "target \"%s\", is too short; it should be " 208 "at least 16 characters long", 209 auth->a_user, 210 auth->a_auth_group->ag_target->t_name); 211 } 212 } 213} 214 215const struct auth * 216auth_new_chap(struct auth_group *ag, const char *user, 217 const char *secret) 218{ 219 struct auth *auth; 220 221 if (ag->ag_type == AG_TYPE_UNKNOWN) 222 ag->ag_type = AG_TYPE_CHAP; 223 if (ag->ag_type != AG_TYPE_CHAP) { 224 if (ag->ag_name != NULL) 225 log_warnx("cannot mix \"chap\" authentication with " 226 "other types for auth-group \"%s\"", ag->ag_name); 227 else 228 log_warnx("cannot mix \"chap\" authentication with " 229 "other types for target \"%s\"", 230 ag->ag_target->t_name); 231 return (NULL); 232 } 233 234 auth = auth_new(ag); 235 auth->a_user = checked_strdup(user); 236 auth->a_secret = checked_strdup(secret); 237 238 auth_check_secret_length(auth); 239 240 return (auth); 241} 242 243const struct auth * 244auth_new_chap_mutual(struct auth_group *ag, const char *user, 245 const char *secret, const char *user2, const char *secret2) 246{ 247 struct auth *auth; 248 249 if (ag->ag_type == AG_TYPE_UNKNOWN) 250 ag->ag_type = AG_TYPE_CHAP_MUTUAL; 251 if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) { 252 if (ag->ag_name != NULL) 253 log_warnx("cannot mix \"chap-mutual\" authentication " 254 "with other types for auth-group \"%s\"", 255 ag->ag_name); 256 else 257 log_warnx("cannot mix \"chap-mutual\" authentication " 258 "with other types for target \"%s\"", 259 ag->ag_target->t_name); 260 return (NULL); 261 } 262 263 auth = auth_new(ag); 264 auth->a_user = checked_strdup(user); 265 auth->a_secret = checked_strdup(secret); 266 auth->a_mutual_user = checked_strdup(user2); 267 auth->a_mutual_secret = checked_strdup(secret2); 268 269 auth_check_secret_length(auth); 270 271 return (auth); 272} 273 274const struct auth_name * 275auth_name_new(struct auth_group *ag, const char *name) 276{ 277 struct auth_name *an; 278 279 an = calloc(1, sizeof(*an)); 280 if (an == NULL) 281 log_err(1, "calloc"); 282 an->an_auth_group = ag; 283 an->an_initator_name = checked_strdup(name); 284 TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next); 285 return (an); 286} 287 288static void 289auth_name_delete(struct auth_name *an) 290{ 291 TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next); 292 293 free(an->an_initator_name); 294 free(an); 295} 296 297bool 298auth_name_defined(const struct auth_group *ag) 299{ 300 if (TAILQ_EMPTY(&ag->ag_names)) 301 return (false); 302 return (true); 303} 304 305const struct auth_name * 306auth_name_find(const struct auth_group *ag, const char *name) 307{ 308 const struct auth_name *auth_name; 309 310 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) { 311 if (strcmp(auth_name->an_initator_name, name) == 0) 312 return (auth_name); 313 } 314 315 return (NULL); 316} 317 318const struct auth_portal * 319auth_portal_new(struct auth_group *ag, const char *portal) 320{ 321 struct auth_portal *ap; 322 323 ap = calloc(1, sizeof(*ap)); 324 if (ap == NULL) 325 log_err(1, "calloc"); 326 ap->ap_auth_group = ag; 327 ap->ap_initator_portal = checked_strdup(portal); 328 TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next); 329 return (ap); 330} 331 332static void 333auth_portal_delete(struct auth_portal *ap) 334{ 335 TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next); 336 337 free(ap->ap_initator_portal); 338 free(ap); 339} 340 341bool 342auth_portal_defined(const struct auth_group *ag) 343{ 344 if (TAILQ_EMPTY(&ag->ag_portals)) 345 return (false); 346 return (true); 347} 348 349const struct auth_portal * 350auth_portal_find(const struct auth_group *ag, const char *portal) 351{ 352 const struct auth_portal *auth_portal; 353 354 TAILQ_FOREACH(auth_portal, &ag->ag_portals, ap_next) { 355 if (strcmp(auth_portal->ap_initator_portal, portal) == 0) 356 return (auth_portal); 357 } 358 359 return (NULL); 360} 361 362struct auth_group * 363auth_group_new(struct conf *conf, const char *name) 364{ 365 struct auth_group *ag; 366 367 if (name != NULL) { 368 ag = auth_group_find(conf, name); 369 if (ag != NULL) { 370 log_warnx("duplicated auth-group \"%s\"", name); 371 return (NULL); 372 } 373 } 374 375 ag = calloc(1, sizeof(*ag)); 376 if (ag == NULL) 377 log_err(1, "calloc"); 378 if (name != NULL) 379 ag->ag_name = checked_strdup(name); 380 TAILQ_INIT(&ag->ag_auths); 381 TAILQ_INIT(&ag->ag_names); 382 TAILQ_INIT(&ag->ag_portals); 383 ag->ag_conf = conf; 384 TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next); 385 386 return (ag); 387} 388 389void 390auth_group_delete(struct auth_group *ag) 391{ 392 struct auth *auth, *auth_tmp; 393 struct auth_name *auth_name, *auth_name_tmp; 394 struct auth_portal *auth_portal, *auth_portal_tmp; 395 396 TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next); 397 398 TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp) 399 auth_delete(auth); 400 TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp) 401 auth_name_delete(auth_name); 402 TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next, 403 auth_portal_tmp) 404 auth_portal_delete(auth_portal); 405 free(ag->ag_name); 406 free(ag); 407} 408 409struct auth_group * 410auth_group_find(const struct conf *conf, const char *name) 411{ 412 struct auth_group *ag; 413 414 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 415 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0) 416 return (ag); 417 } 418 419 return (NULL); 420} 421 422static int 423auth_group_set_type(struct auth_group *ag, int type) 424{ 425 426 if (ag->ag_type == AG_TYPE_UNKNOWN) { 427 ag->ag_type = type; 428 return (0); 429 } 430 431 if (ag->ag_type == type) 432 return (0); 433 434 return (1); 435} 436 437int 438auth_group_set_type_str(struct auth_group *ag, const char *str) 439{ 440 int error, type; 441 442 if (strcmp(str, "none") == 0) { 443 type = AG_TYPE_NO_AUTHENTICATION; 444 } else if (strcmp(str, "deny") == 0) { 445 type = AG_TYPE_DENY; 446 } else if (strcmp(str, "chap") == 0) { 447 type = AG_TYPE_CHAP; 448 } else if (strcmp(str, "chap-mutual") == 0) { 449 type = AG_TYPE_CHAP_MUTUAL; 450 } else { 451 if (ag->ag_name != NULL) 452 log_warnx("invalid auth-type \"%s\" for auth-group " 453 "\"%s\"", str, ag->ag_name); 454 else 455 log_warnx("invalid auth-type \"%s\" for target " 456 "\"%s\"", str, ag->ag_target->t_name); 457 return (1); 458 } 459 460 error = auth_group_set_type(ag, type); 461 if (error != 0) { 462 if (ag->ag_name != NULL) 463 log_warnx("cannot set auth-type to \"%s\" for " 464 "auth-group \"%s\"; already has a different " 465 "type", str, ag->ag_name); 466 else 467 log_warnx("cannot set auth-type to \"%s\" for target " 468 "\"%s\"; already has a different type", 469 str, ag->ag_target->t_name); 470 return (1); 471 } 472 473 return (error); 474} 475 476static struct portal * 477portal_new(struct portal_group *pg) 478{ 479 struct portal *portal; 480 481 portal = calloc(1, sizeof(*portal)); 482 if (portal == NULL) 483 log_err(1, "calloc"); 484 TAILQ_INIT(&portal->p_targets); 485 portal->p_portal_group = pg; 486 TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next); 487 return (portal); 488} 489 490static void 491portal_delete(struct portal *portal) 492{ 493 TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next); 494 freeaddrinfo(portal->p_ai); 495 free(portal->p_listen); 496 free(portal); 497} 498 499struct portal_group * 500portal_group_new(struct conf *conf, const char *name) 501{ 502 struct portal_group *pg; 503 504 pg = portal_group_find(conf, name); 505 if (pg != NULL) { 506 log_warnx("duplicated portal-group \"%s\"", name); 507 return (NULL); 508 } 509 510 pg = calloc(1, sizeof(*pg)); 511 if (pg == NULL) 512 log_err(1, "calloc"); 513 pg->pg_name = checked_strdup(name); 514 TAILQ_INIT(&pg->pg_portals); 515 pg->pg_conf = conf; 516 conf->conf_last_portal_group_tag++; 517 pg->pg_tag = conf->conf_last_portal_group_tag; 518 TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next); 519 520 return (pg); 521} 522 523void 524portal_group_delete(struct portal_group *pg) 525{ 526 struct portal *portal, *tmp; 527 528 TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next); 529 530 TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp) 531 portal_delete(portal); 532 free(pg->pg_name); 533 free(pg); 534} 535 536struct portal_group * 537portal_group_find(const struct conf *conf, const char *name) 538{ 539 struct portal_group *pg; 540 541 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 542 if (strcmp(pg->pg_name, name) == 0) 543 return (pg); 544 } 545 546 return (NULL); 547} 548 549int 550portal_group_add_listen(struct portal_group *pg, const char *value, bool iser) 551{ 552 struct addrinfo hints; 553 struct portal *portal; 554 char *addr, *ch, *arg; 555 const char *port; 556 int error, colons = 0; 557 558 portal = portal_new(pg); 559 portal->p_listen = checked_strdup(value); 560 portal->p_iser = iser; 561 562 arg = portal->p_listen; 563 if (arg[0] == '\0') { 564 log_warnx("empty listen address"); 565 free(portal->p_listen); 566 free(portal); 567 return (1); 568 } 569 if (arg[0] == '[') { 570 /* 571 * IPv6 address in square brackets, perhaps with port. 572 */ 573 arg++; 574 addr = strsep(&arg, "]"); 575 if (arg == NULL) { 576 log_warnx("invalid listen address %s", 577 portal->p_listen); 578 free(portal->p_listen); 579 free(portal); 580 return (1); 581 } 582 if (arg[0] == '\0') { 583 port = "3260"; 584 } else if (arg[0] == ':') { 585 port = arg + 1; 586 } else { 587 log_warnx("invalid listen address %s", 588 portal->p_listen); 589 free(portal->p_listen); 590 free(portal); 591 return (1); 592 } 593 } else { 594 /* 595 * Either IPv6 address without brackets - and without 596 * a port - or IPv4 address. Just count the colons. 597 */ 598 for (ch = arg; *ch != '\0'; ch++) { 599 if (*ch == ':') 600 colons++; 601 } 602 if (colons > 1) { 603 addr = arg; 604 port = "3260"; 605 } else { 606 addr = strsep(&arg, ":"); 607 if (arg == NULL) 608 port = "3260"; 609 else 610 port = arg; 611 } 612 } 613 614 memset(&hints, 0, sizeof(hints)); 615 hints.ai_family = PF_UNSPEC; 616 hints.ai_socktype = SOCK_STREAM; 617 hints.ai_flags = AI_PASSIVE; 618 619 error = getaddrinfo(addr, port, &hints, &portal->p_ai); 620 if (error != 0) { 621 log_warnx("getaddrinfo for %s failed: %s", 622 portal->p_listen, gai_strerror(error)); 623 free(portal->p_listen); 624 free(portal); 625 return (1); 626 } 627 628 /* 629 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 630 * those into multiple portals. 631 */ 632 633 return (0); 634} 635 636static bool 637valid_hex(const char ch) 638{ 639 switch (ch) { 640 case '0': 641 case '1': 642 case '2': 643 case '3': 644 case '4': 645 case '5': 646 case '6': 647 case '7': 648 case '8': 649 case '9': 650 case 'a': 651 case 'A': 652 case 'b': 653 case 'B': 654 case 'c': 655 case 'C': 656 case 'd': 657 case 'D': 658 case 'e': 659 case 'E': 660 case 'f': 661 case 'F': 662 return (true); 663 default: 664 return (false); 665 } 666} 667 668bool 669valid_iscsi_name(const char *name) 670{ 671 int i; 672 673 if (strlen(name) >= MAX_NAME_LEN) { 674 log_warnx("overlong name for target \"%s\"; max length allowed " 675 "by iSCSI specification is %d characters", 676 name, MAX_NAME_LEN); 677 return (false); 678 } 679 680 /* 681 * In the cases below, we don't return an error, just in case the admin 682 * was right, and we're wrong. 683 */ 684 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) { 685 for (i = strlen("iqn."); name[i] != '\0'; i++) { 686 /* 687 * XXX: We should verify UTF-8 normalisation, as defined 688 * by 3.2.6.2: iSCSI Name Encoding. 689 */ 690 if (isalnum(name[i])) 691 continue; 692 if (name[i] == '-' || name[i] == '.' || name[i] == ':') 693 continue; 694 log_warnx("invalid character \"%c\" in target name " 695 "\"%s\"; allowed characters are letters, digits, " 696 "'-', '.', and ':'", name[i], name); 697 break; 698 } 699 /* 700 * XXX: Check more stuff: valid date and a valid reversed domain. 701 */ 702 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) { 703 if (strlen(name) != strlen("eui.") + 16) 704 log_warnx("invalid target name \"%s\"; the \"eui.\" " 705 "should be followed by exactly 16 hexadecimal " 706 "digits", name); 707 for (i = strlen("eui."); name[i] != '\0'; i++) { 708 if (!valid_hex(name[i])) { 709 log_warnx("invalid character \"%c\" in target " 710 "name \"%s\"; allowed characters are 1-9 " 711 "and A-F", name[i], name); 712 break; 713 } 714 } 715 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) { 716 if (strlen(name) > strlen("naa.") + 32) 717 log_warnx("invalid target name \"%s\"; the \"naa.\" " 718 "should be followed by at most 32 hexadecimal " 719 "digits", name); 720 for (i = strlen("naa."); name[i] != '\0'; i++) { 721 if (!valid_hex(name[i])) { 722 log_warnx("invalid character \"%c\" in target " 723 "name \"%s\"; allowed characters are 1-9 " 724 "and A-F", name[i], name); 725 break; 726 } 727 } 728 } else { 729 log_warnx("invalid target name \"%s\"; should start with " 730 "either \".iqn\", \"eui.\", or \"naa.\"", 731 name); 732 } 733 return (true); 734} 735 736struct target * 737target_new(struct conf *conf, const char *name) 738{ 739 struct target *targ; 740 int i, len; 741 742 targ = target_find(conf, name); 743 if (targ != NULL) { 744 log_warnx("duplicated target \"%s\"", name); 745 return (NULL); 746 } 747 if (valid_iscsi_name(name) == false) { 748 log_warnx("target name \"%s\" is invalid", name); 749 return (NULL); 750 } 751 targ = calloc(1, sizeof(*targ)); 752 if (targ == NULL) 753 log_err(1, "calloc"); 754 targ->t_name = checked_strdup(name); 755 756 /* 757 * RFC 3722 requires us to normalize the name to lowercase. 758 */ 759 len = strlen(name); 760 for (i = 0; i < len; i++) 761 targ->t_name[i] = tolower(targ->t_name[i]); 762 763 TAILQ_INIT(&targ->t_luns); 764 targ->t_conf = conf; 765 TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next); 766 767 return (targ); 768} 769 770void 771target_delete(struct target *targ) 772{ 773 struct lun *lun, *tmp; 774 775 TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next); 776 777 TAILQ_FOREACH_SAFE(lun, &targ->t_luns, l_next, tmp) 778 lun_delete(lun); 779 free(targ->t_name); 780 free(targ); 781} 782 783struct target * 784target_find(struct conf *conf, const char *name) 785{ 786 struct target *targ; 787 788 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 789 if (strcasecmp(targ->t_name, name) == 0) 790 return (targ); 791 } 792 793 return (NULL); 794} 795 796struct lun * 797lun_new(struct target *targ, int lun_id) 798{ 799 struct lun *lun; 800 801 lun = lun_find(targ, lun_id); 802 if (lun != NULL) { 803 log_warnx("duplicated lun %d for target \"%s\"", 804 lun_id, targ->t_name); 805 return (NULL); 806 } 807 808 lun = calloc(1, sizeof(*lun)); 809 if (lun == NULL) 810 log_err(1, "calloc"); 811 lun->l_lun = lun_id; 812 TAILQ_INIT(&lun->l_options); 813 lun->l_target = targ; 814 TAILQ_INSERT_TAIL(&targ->t_luns, lun, l_next); 815 816 return (lun); 817} 818 819void 820lun_delete(struct lun *lun) 821{ 822 struct lun_option *lo, *tmp; 823 824 TAILQ_REMOVE(&lun->l_target->t_luns, lun, l_next); 825 826 TAILQ_FOREACH_SAFE(lo, &lun->l_options, lo_next, tmp) 827 lun_option_delete(lo); 828 free(lun->l_backend); 829 free(lun->l_device_id); 830 free(lun->l_path); 831 free(lun->l_serial); 832 free(lun); 833} 834 835struct lun * 836lun_find(const struct target *targ, int lun_id) 837{ 838 struct lun *lun; 839 840 TAILQ_FOREACH(lun, &targ->t_luns, l_next) { 841 if (lun->l_lun == lun_id) 842 return (lun); 843 } 844 845 return (NULL); 846} 847 848void 849lun_set_backend(struct lun *lun, const char *value) 850{ 851 free(lun->l_backend); 852 lun->l_backend = checked_strdup(value); 853} 854 855void 856lun_set_blocksize(struct lun *lun, size_t value) 857{ 858 859 lun->l_blocksize = value; 860} 861 862void 863lun_set_device_id(struct lun *lun, const char *value) 864{ 865 free(lun->l_device_id); 866 lun->l_device_id = checked_strdup(value); 867} 868 869void 870lun_set_path(struct lun *lun, const char *value) 871{ 872 free(lun->l_path); 873 lun->l_path = checked_strdup(value); 874} 875 876void 877lun_set_serial(struct lun *lun, const char *value) 878{ 879 free(lun->l_serial); 880 lun->l_serial = checked_strdup(value); 881} 882 883void 884lun_set_size(struct lun *lun, size_t value) 885{ 886 887 lun->l_size = value; 888} 889 890void 891lun_set_ctl_lun(struct lun *lun, uint32_t value) 892{ 893 894 lun->l_ctl_lun = value; 895} 896 897struct lun_option * 898lun_option_new(struct lun *lun, const char *name, const char *value) 899{ 900 struct lun_option *lo; 901 902 lo = lun_option_find(lun, name); 903 if (lo != NULL) { 904 log_warnx("duplicated lun option %s for lun %d, target \"%s\"", 905 name, lun->l_lun, lun->l_target->t_name); 906 return (NULL); 907 } 908 909 lo = calloc(1, sizeof(*lo)); 910 if (lo == NULL) 911 log_err(1, "calloc"); 912 lo->lo_name = checked_strdup(name); 913 lo->lo_value = checked_strdup(value); 914 lo->lo_lun = lun; 915 TAILQ_INSERT_TAIL(&lun->l_options, lo, lo_next); 916 917 return (lo); 918} 919 920void 921lun_option_delete(struct lun_option *lo) 922{ 923 924 TAILQ_REMOVE(&lo->lo_lun->l_options, lo, lo_next); 925 926 free(lo->lo_name); 927 free(lo->lo_value); 928 free(lo); 929} 930 931struct lun_option * 932lun_option_find(const struct lun *lun, const char *name) 933{ 934 struct lun_option *lo; 935 936 TAILQ_FOREACH(lo, &lun->l_options, lo_next) { 937 if (strcmp(lo->lo_name, name) == 0) 938 return (lo); 939 } 940 941 return (NULL); 942} 943 944void 945lun_option_set(struct lun_option *lo, const char *value) 946{ 947 948 free(lo->lo_value); 949 lo->lo_value = checked_strdup(value); 950} 951 952static struct connection * 953connection_new(struct portal *portal, int fd, const char *host) 954{ 955 struct connection *conn; 956 957 conn = calloc(1, sizeof(*conn)); 958 if (conn == NULL) 959 log_err(1, "calloc"); 960 conn->conn_portal = portal; 961 conn->conn_socket = fd; 962 conn->conn_initiator_addr = checked_strdup(host); 963 964 /* 965 * Default values, from RFC 3720, section 12. 966 */ 967 conn->conn_max_data_segment_length = 8192; 968 conn->conn_max_burst_length = 262144; 969 conn->conn_immediate_data = true; 970 971 return (conn); 972} 973 974#if 0 975static void 976conf_print(struct conf *conf) 977{ 978 struct auth_group *ag; 979 struct auth *auth; 980 struct auth_name *auth_name; 981 struct auth_portal *auth_portal; 982 struct portal_group *pg; 983 struct portal *portal; 984 struct target *targ; 985 struct lun *lun; 986 struct lun_option *lo; 987 988 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 989 fprintf(stderr, "auth-group %s {\n", ag->ag_name); 990 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) 991 fprintf(stderr, "\t chap-mutual %s %s %s %s\n", 992 auth->a_user, auth->a_secret, 993 auth->a_mutual_user, auth->a_mutual_secret); 994 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) 995 fprintf(stderr, "\t initiator-name %s\n", 996 auth_name->an_initator_name); 997 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next) 998 fprintf(stderr, "\t initiator-portal %s\n", 999 auth_portal->an_initator_portal); 1000 fprintf(stderr, "}\n"); 1001 } 1002 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1003 fprintf(stderr, "portal-group %s {\n", pg->pg_name); 1004 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 1005 fprintf(stderr, "\t listen %s\n", portal->p_listen); 1006 fprintf(stderr, "}\n"); 1007 } 1008 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1009 fprintf(stderr, "target %s {\n", targ->t_name); 1010 if (targ->t_alias != NULL) 1011 fprintf(stderr, "\t alias %s\n", targ->t_alias); 1012 TAILQ_FOREACH(lun, &targ->t_luns, l_next) { 1013 fprintf(stderr, "\tlun %d {\n", lun->l_lun); 1014 fprintf(stderr, "\t\tpath %s\n", lun->l_path); 1015 TAILQ_FOREACH(lo, &lun->l_options, lo_next) 1016 fprintf(stderr, "\t\toption %s %s\n", 1017 lo->lo_name, lo->lo_value); 1018 fprintf(stderr, "\t}\n"); 1019 } 1020 fprintf(stderr, "}\n"); 1021 } 1022} 1023#endif 1024 1025static int 1026conf_verify_lun(struct lun *lun) 1027{ 1028 const struct lun *lun2; 1029 const struct target *targ2; 1030 1031 if (lun->l_backend == NULL) 1032 lun_set_backend(lun, "block"); 1033 if (strcmp(lun->l_backend, "block") == 0) { 1034 if (lun->l_path == NULL) { 1035 log_warnx("missing path for lun %d, target \"%s\"", 1036 lun->l_lun, lun->l_target->t_name); 1037 return (1); 1038 } 1039 } else if (strcmp(lun->l_backend, "ramdisk") == 0) { 1040 if (lun->l_size == 0) { 1041 log_warnx("missing size for ramdisk-backed lun %d, " 1042 "target \"%s\"", lun->l_lun, lun->l_target->t_name); 1043 return (1); 1044 } 1045 if (lun->l_path != NULL) { 1046 log_warnx("path must not be specified " 1047 "for ramdisk-backed lun %d, target \"%s\"", 1048 lun->l_lun, lun->l_target->t_name); 1049 return (1); 1050 } 1051 } 1052 if (lun->l_lun < 0 || lun->l_lun > 255) { 1053 log_warnx("invalid lun number for lun %d, target \"%s\"; " 1054 "must be between 0 and 255", lun->l_lun, 1055 lun->l_target->t_name); 1056 return (1); 1057 } 1058 if (lun->l_blocksize == 0) { 1059 lun_set_blocksize(lun, DEFAULT_BLOCKSIZE); 1060 } else if (lun->l_blocksize < 0) { 1061 log_warnx("invalid blocksize for lun %d, target \"%s\"; " 1062 "must be larger than 0", lun->l_lun, lun->l_target->t_name); 1063 return (1); 1064 } 1065 if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) { 1066 log_warnx("invalid size for lun %d, target \"%s\"; " 1067 "must be multiple of blocksize", lun->l_lun, 1068 lun->l_target->t_name); 1069 return (1); 1070 } 1071 TAILQ_FOREACH(targ2, &lun->l_target->t_conf->conf_targets, t_next) { 1072 TAILQ_FOREACH(lun2, &targ2->t_luns, l_next) { 1073 if (lun == lun2) 1074 continue; 1075 if (lun->l_path != NULL && lun2->l_path != NULL && 1076 strcmp(lun->l_path, lun2->l_path) == 0) { 1077 log_debugx("WARNING: path \"%s\" duplicated " 1078 "between lun %d, target \"%s\", and " 1079 "lun %d, target \"%s\"", lun->l_path, 1080 lun->l_lun, lun->l_target->t_name, 1081 lun2->l_lun, lun2->l_target->t_name); 1082 } 1083 } 1084 } 1085 1086 return (0); 1087} 1088 1089int 1090conf_verify(struct conf *conf) 1091{ 1092 struct auth_group *ag; 1093 struct portal_group *pg; 1094 struct target *targ; 1095 struct lun *lun; 1096 bool found_lun; 1097 int error; 1098 1099 if (conf->conf_pidfile_path == NULL) 1100 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE); 1101 1102 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1103 if (targ->t_auth_group == NULL) { 1104 targ->t_auth_group = auth_group_find(conf, 1105 "default"); 1106 assert(targ->t_auth_group != NULL); 1107 } 1108 if (targ->t_portal_group == NULL) { 1109 targ->t_portal_group = portal_group_find(conf, 1110 "default"); 1111 assert(targ->t_portal_group != NULL); 1112 } 1113 found_lun = false; 1114 TAILQ_FOREACH(lun, &targ->t_luns, l_next) { 1115 error = conf_verify_lun(lun); 1116 if (error != 0) 1117 return (error); 1118 found_lun = true; 1119 } 1120 if (!found_lun) { 1121 log_warnx("no LUNs defined for target \"%s\"", 1122 targ->t_name); 1123 return (1); 1124 } 1125 } 1126 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1127 assert(pg->pg_name != NULL); 1128 if (pg->pg_discovery_auth_group == NULL) { 1129 pg->pg_discovery_auth_group = 1130 auth_group_find(conf, "default"); 1131 assert(pg->pg_discovery_auth_group != NULL); 1132 } 1133 1134 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1135 if (targ->t_portal_group == pg) 1136 break; 1137 } 1138 if (targ == NULL) { 1139 if (strcmp(pg->pg_name, "default") != 0) 1140 log_warnx("portal-group \"%s\" not assigned " 1141 "to any target", pg->pg_name); 1142 pg->pg_unassigned = true; 1143 } else 1144 pg->pg_unassigned = false; 1145 } 1146 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1147 if (ag->ag_name == NULL) 1148 assert(ag->ag_target != NULL); 1149 else 1150 assert(ag->ag_target == NULL); 1151 1152 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1153 if (targ->t_auth_group == ag) 1154 break; 1155 } 1156 if (targ == NULL && ag->ag_name != NULL && 1157 strcmp(ag->ag_name, "default") != 0 && 1158 strcmp(ag->ag_name, "no-authentication") != 0 && 1159 strcmp(ag->ag_name, "no-access") != 0) { 1160 log_warnx("auth-group \"%s\" not assigned " 1161 "to any target", ag->ag_name); 1162 } 1163 } 1164 1165 return (0); 1166} 1167 1168static int 1169conf_apply(struct conf *oldconf, struct conf *newconf) 1170{ 1171 struct target *oldtarg, *newtarg, *tmptarg; 1172 struct lun *oldlun, *newlun, *tmplun; 1173 struct portal_group *oldpg, *newpg; 1174 struct portal *oldp, *newp; 1175 pid_t otherpid; 1176 int changed, cumulated_error = 0, error; 1177 int one = 1; 1178 1179 if (oldconf->conf_debug != newconf->conf_debug) { 1180 log_debugx("changing debug level to %d", newconf->conf_debug); 1181 log_init(newconf->conf_debug); 1182 } 1183 1184 if (oldconf->conf_pidfh != NULL) { 1185 assert(oldconf->conf_pidfile_path != NULL); 1186 if (newconf->conf_pidfile_path != NULL && 1187 strcmp(oldconf->conf_pidfile_path, 1188 newconf->conf_pidfile_path) == 0) { 1189 newconf->conf_pidfh = oldconf->conf_pidfh; 1190 oldconf->conf_pidfh = NULL; 1191 } else { 1192 log_debugx("removing pidfile %s", 1193 oldconf->conf_pidfile_path); 1194 pidfile_remove(oldconf->conf_pidfh); 1195 oldconf->conf_pidfh = NULL; 1196 } 1197 } 1198 1199 if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) { 1200 log_debugx("opening pidfile %s", newconf->conf_pidfile_path); 1201 newconf->conf_pidfh = 1202 pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid); 1203 if (newconf->conf_pidfh == NULL) { 1204 if (errno == EEXIST) 1205 log_errx(1, "daemon already running, pid: %jd.", 1206 (intmax_t)otherpid); 1207 log_err(1, "cannot open or create pidfile \"%s\"", 1208 newconf->conf_pidfile_path); 1209 } 1210 } 1211 1212 if (oldconf->conf_kernel_port_on != newconf->conf_kernel_port_on) { 1213 if (newconf->conf_kernel_port_on == true) { 1214 log_debugx("enabling CTL iSCSI port"); 1215 error = kernel_port_on(); 1216 if (error != 0) 1217 log_errx(1, "failed to enable CTL iSCSI port; exiting"); 1218 } else { 1219 error = kernel_port_off(); 1220 if (error != 0) 1221 log_warnx("failed to disable CTL iSCSI port"); 1222 } 1223 } 1224 1225 TAILQ_FOREACH_SAFE(oldtarg, &oldconf->conf_targets, t_next, tmptarg) { 1226 /* 1227 * First, remove any targets present in the old configuration 1228 * and missing in the new one. 1229 */ 1230 newtarg = target_find(newconf, oldtarg->t_name); 1231 if (newtarg == NULL) { 1232 TAILQ_FOREACH_SAFE(oldlun, &oldtarg->t_luns, l_next, 1233 tmplun) { 1234 log_debugx("target %s not found in new " 1235 "configuration; removing its lun %d, " 1236 "backed by CTL lun %d", 1237 oldtarg->t_name, oldlun->l_lun, 1238 oldlun->l_ctl_lun); 1239 error = kernel_lun_remove(oldlun); 1240 if (error != 0) { 1241 log_warnx("failed to remove lun %d, " 1242 "target %s, CTL lun %d", 1243 oldlun->l_lun, oldtarg->t_name, 1244 oldlun->l_ctl_lun); 1245 cumulated_error++; 1246 } 1247 lun_delete(oldlun); 1248 } 1249 target_delete(oldtarg); 1250 continue; 1251 } 1252 1253 /* 1254 * Second, remove any LUNs present in the old target 1255 * and missing in the new one. 1256 */ 1257 TAILQ_FOREACH_SAFE(oldlun, &oldtarg->t_luns, l_next, tmplun) { 1258 newlun = lun_find(newtarg, oldlun->l_lun); 1259 if (newlun == NULL) { 1260 log_debugx("lun %d, target %s, CTL lun %d " 1261 "not found in new configuration; " 1262 "removing", oldlun->l_lun, oldtarg->t_name, 1263 oldlun->l_ctl_lun); 1264 error = kernel_lun_remove(oldlun); 1265 if (error != 0) { 1266 log_warnx("failed to remove lun %d, " 1267 "target %s, CTL lun %d", 1268 oldlun->l_lun, oldtarg->t_name, 1269 oldlun->l_ctl_lun); 1270 cumulated_error++; 1271 } 1272 lun_delete(oldlun); 1273 continue; 1274 } 1275 1276 /* 1277 * Also remove the LUNs changed by more than size. 1278 */ 1279 changed = 0; 1280 assert(oldlun->l_backend != NULL); 1281 assert(newlun->l_backend != NULL); 1282 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) { 1283 log_debugx("backend for lun %d, target %s, " 1284 "CTL lun %d changed; removing", 1285 oldlun->l_lun, oldtarg->t_name, 1286 oldlun->l_ctl_lun); 1287 changed = 1; 1288 } 1289 if (oldlun->l_blocksize != newlun->l_blocksize) { 1290 log_debugx("blocksize for lun %d, target %s, " 1291 "CTL lun %d changed; removing", 1292 oldlun->l_lun, oldtarg->t_name, 1293 oldlun->l_ctl_lun); 1294 changed = 1; 1295 } 1296 if (newlun->l_device_id != NULL && 1297 (oldlun->l_device_id == NULL || 1298 strcmp(oldlun->l_device_id, newlun->l_device_id) != 1299 0)) { 1300 log_debugx("device-id for lun %d, target %s, " 1301 "CTL lun %d changed; removing", 1302 oldlun->l_lun, oldtarg->t_name, 1303 oldlun->l_ctl_lun); 1304 changed = 1; 1305 } 1306 if (newlun->l_path != NULL && 1307 (oldlun->l_path == NULL || 1308 strcmp(oldlun->l_path, newlun->l_path) != 0)) { 1309 log_debugx("path for lun %d, target %s, " 1310 "CTL lun %d, changed; removing", 1311 oldlun->l_lun, oldtarg->t_name, 1312 oldlun->l_ctl_lun); 1313 changed = 1; 1314 } 1315 if (newlun->l_serial != NULL && 1316 (oldlun->l_serial == NULL || 1317 strcmp(oldlun->l_serial, newlun->l_serial) != 0)) { 1318 log_debugx("serial for lun %d, target %s, " 1319 "CTL lun %d changed; removing", 1320 oldlun->l_lun, oldtarg->t_name, 1321 oldlun->l_ctl_lun); 1322 changed = 1; 1323 } 1324 if (changed) { 1325 error = kernel_lun_remove(oldlun); 1326 if (error != 0) { 1327 log_warnx("failed to remove lun %d, " 1328 "target %s, CTL lun %d", 1329 oldlun->l_lun, oldtarg->t_name, 1330 oldlun->l_ctl_lun); 1331 cumulated_error++; 1332 } 1333 lun_delete(oldlun); 1334 continue; 1335 } 1336 1337 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun); 1338 } 1339 } 1340 1341 /* 1342 * Now add new targets or modify existing ones. 1343 */ 1344 TAILQ_FOREACH(newtarg, &newconf->conf_targets, t_next) { 1345 oldtarg = target_find(oldconf, newtarg->t_name); 1346 1347 TAILQ_FOREACH(newlun, &newtarg->t_luns, l_next) { 1348 if (oldtarg != NULL) { 1349 oldlun = lun_find(oldtarg, newlun->l_lun); 1350 if (oldlun != NULL) { 1351 if (newlun->l_size != oldlun->l_size) { 1352 log_debugx("resizing lun %d, " 1353 "target %s, CTL lun %d", 1354 newlun->l_lun, 1355 newtarg->t_name, 1356 newlun->l_ctl_lun); 1357 error = 1358 kernel_lun_resize(newlun); 1359 if (error != 0) { 1360 log_warnx("failed to " 1361 "resize lun %d, " 1362 "target %s, " 1363 "CTL lun %d", 1364 newlun->l_lun, 1365 newtarg->t_name, 1366 newlun->l_lun); 1367 cumulated_error++; 1368 } 1369 } 1370 continue; 1371 } 1372 } 1373 log_debugx("adding lun %d, target %s", 1374 newlun->l_lun, newtarg->t_name); 1375 error = kernel_lun_add(newlun); 1376 if (error != 0) { 1377 log_warnx("failed to add lun %d, target %s", 1378 newlun->l_lun, newtarg->t_name); 1379 cumulated_error++; 1380 } 1381 } 1382 } 1383 1384 /* 1385 * Go through the new portals, opening the sockets as neccessary. 1386 */ 1387 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 1388 if (newpg->pg_unassigned) { 1389 log_debugx("not listening on portal-group \"%s\", " 1390 "not assigned to any target", 1391 newpg->pg_name); 1392 continue; 1393 } 1394 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) { 1395 /* 1396 * Try to find already open portal and reuse 1397 * the listening socket. We don't care about 1398 * what portal or portal group that was, what 1399 * matters is the listening address. 1400 */ 1401 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, 1402 pg_next) { 1403 TAILQ_FOREACH(oldp, &oldpg->pg_portals, 1404 p_next) { 1405 if (strcmp(newp->p_listen, 1406 oldp->p_listen) == 0 && 1407 oldp->p_socket > 0) { 1408 newp->p_socket = 1409 oldp->p_socket; 1410 oldp->p_socket = 0; 1411 break; 1412 } 1413 } 1414 } 1415 if (newp->p_socket > 0) { 1416 /* 1417 * We're done with this portal. 1418 */ 1419 continue; 1420 } 1421 1422#ifdef ICL_KERNEL_PROXY 1423 if (proxy_mode) { 1424 newpg->pg_conf->conf_portal_id++; 1425 newp->p_id = newpg->pg_conf->conf_portal_id; 1426 log_debugx("listening on %s, portal-group " 1427 "\"%s\", portal id %d, using ICL proxy", 1428 newp->p_listen, newpg->pg_name, newp->p_id); 1429 kernel_listen(newp->p_ai, newp->p_iser, 1430 newp->p_id); 1431 continue; 1432 } 1433#endif 1434 assert(proxy_mode == false); 1435 assert(newp->p_iser == false); 1436 1437 log_debugx("listening on %s, portal-group \"%s\"", 1438 newp->p_listen, newpg->pg_name); 1439 newp->p_socket = socket(newp->p_ai->ai_family, 1440 newp->p_ai->ai_socktype, 1441 newp->p_ai->ai_protocol); 1442 if (newp->p_socket < 0) { 1443 log_warn("socket(2) failed for %s", 1444 newp->p_listen); 1445 cumulated_error++; 1446 continue; 1447 } 1448 error = setsockopt(newp->p_socket, SOL_SOCKET, 1449 SO_REUSEADDR, &one, sizeof(one)); 1450 if (error != 0) { 1451 log_warn("setsockopt(SO_REUSEADDR) failed " 1452 "for %s", newp->p_listen); 1453 close(newp->p_socket); 1454 newp->p_socket = 0; 1455 cumulated_error++; 1456 continue; 1457 } 1458 error = bind(newp->p_socket, newp->p_ai->ai_addr, 1459 newp->p_ai->ai_addrlen); 1460 if (error != 0) { 1461 log_warn("bind(2) failed for %s", 1462 newp->p_listen); 1463 close(newp->p_socket); 1464 newp->p_socket = 0; 1465 cumulated_error++; 1466 continue; 1467 } 1468 error = listen(newp->p_socket, -1); 1469 if (error != 0) { 1470 log_warn("listen(2) failed for %s", 1471 newp->p_listen); 1472 close(newp->p_socket); 1473 newp->p_socket = 0; 1474 cumulated_error++; 1475 continue; 1476 } 1477 } 1478 } 1479 1480 /* 1481 * Go through the no longer used sockets, closing them. 1482 */ 1483 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) { 1484 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) { 1485 if (oldp->p_socket <= 0) 1486 continue; 1487 log_debugx("closing socket for %s, portal-group \"%s\"", 1488 oldp->p_listen, oldpg->pg_name); 1489 close(oldp->p_socket); 1490 oldp->p_socket = 0; 1491 } 1492 } 1493 1494 return (cumulated_error); 1495} 1496 1497bool 1498timed_out(void) 1499{ 1500 1501 return (sigalrm_received); 1502} 1503 1504static void 1505sigalrm_handler(int dummy __unused) 1506{ 1507 /* 1508 * It would be easiest to just log an error and exit. We can't 1509 * do this, though, because log_errx() is not signal safe, since 1510 * it calls syslog(3). Instead, set a flag checked by pdu_send() 1511 * and pdu_receive(), to call log_errx() there. Should they fail 1512 * to notice, we'll exit here one second later. 1513 */ 1514 if (sigalrm_received) { 1515 /* 1516 * Oh well. Just give up and quit. 1517 */ 1518 _exit(2); 1519 } 1520 1521 sigalrm_received = true; 1522} 1523 1524static void 1525set_timeout(const struct conf *conf) 1526{ 1527 struct sigaction sa; 1528 struct itimerval itv; 1529 int error; 1530 1531 if (conf->conf_timeout <= 0) { 1532 log_debugx("session timeout disabled"); 1533 return; 1534 } 1535 1536 bzero(&sa, sizeof(sa)); 1537 sa.sa_handler = sigalrm_handler; 1538 sigfillset(&sa.sa_mask); 1539 error = sigaction(SIGALRM, &sa, NULL); 1540 if (error != 0) 1541 log_err(1, "sigaction"); 1542 1543 /* 1544 * First SIGALRM will arive after conf_timeout seconds. 1545 * If we do nothing, another one will arrive a second later. 1546 */ 1547 bzero(&itv, sizeof(itv)); 1548 itv.it_interval.tv_sec = 1; 1549 itv.it_value.tv_sec = conf->conf_timeout; 1550 1551 log_debugx("setting session timeout to %d seconds", 1552 conf->conf_timeout); 1553 error = setitimer(ITIMER_REAL, &itv, NULL); 1554 if (error != 0) 1555 log_err(1, "setitimer"); 1556} 1557 1558static int 1559wait_for_children(bool block) 1560{ 1561 pid_t pid; 1562 int status; 1563 int num = 0; 1564 1565 for (;;) { 1566 /* 1567 * If "block" is true, wait for at least one process. 1568 */ 1569 if (block && num == 0) 1570 pid = wait4(-1, &status, 0, NULL); 1571 else 1572 pid = wait4(-1, &status, WNOHANG, NULL); 1573 if (pid <= 0) 1574 break; 1575 if (WIFSIGNALED(status)) { 1576 log_warnx("child process %d terminated with signal %d", 1577 pid, WTERMSIG(status)); 1578 } else if (WEXITSTATUS(status) != 0) { 1579 log_warnx("child process %d terminated with exit status %d", 1580 pid, WEXITSTATUS(status)); 1581 } else { 1582 log_debugx("child process %d terminated gracefully", pid); 1583 } 1584 num++; 1585 } 1586 1587 return (num); 1588} 1589 1590static void 1591handle_connection(struct portal *portal, int fd, 1592 const struct sockaddr *client_sa, socklen_t client_salen, bool dont_fork) 1593{ 1594 struct connection *conn; 1595 int error; 1596 pid_t pid; 1597 char host[NI_MAXHOST + 1]; 1598 struct conf *conf; 1599 1600 conf = portal->p_portal_group->pg_conf; 1601 1602 if (dont_fork) { 1603 log_debugx("incoming connection; not forking due to -d flag"); 1604 } else { 1605 nchildren -= wait_for_children(false); 1606 assert(nchildren >= 0); 1607 1608 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) { 1609 log_debugx("maxproc limit of %d child processes hit; " 1610 "waiting for child process to exit", conf->conf_maxproc); 1611 nchildren -= wait_for_children(true); 1612 assert(nchildren >= 0); 1613 } 1614 log_debugx("incoming connection; forking child process #%d", 1615 nchildren); 1616 nchildren++; 1617 pid = fork(); 1618 if (pid < 0) 1619 log_err(1, "fork"); 1620 if (pid > 0) { 1621 close(fd); 1622 return; 1623 } 1624 } 1625 pidfile_close(conf->conf_pidfh); 1626 1627 error = getnameinfo(client_sa, client_salen, 1628 host, sizeof(host), NULL, 0, NI_NUMERICHOST); 1629 if (error != 0) 1630 log_errx(1, "getnameinfo: %s", gai_strerror(error)); 1631 1632 log_debugx("accepted connection from %s; portal group \"%s\"", 1633 host, portal->p_portal_group->pg_name); 1634 log_set_peer_addr(host); 1635 setproctitle("%s", host); 1636 1637 conn = connection_new(portal, fd, host); 1638 set_timeout(conf); 1639 kernel_capsicate(); 1640 login(conn); 1641 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) { 1642 kernel_handoff(conn); 1643 log_debugx("connection handed off to the kernel"); 1644 } else { 1645 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY); 1646 discovery(conn); 1647 } 1648 log_debugx("nothing more to do; exiting"); 1649 exit(0); 1650} 1651 1652static int 1653fd_add(int fd, fd_set *fdset, int nfds) 1654{ 1655 1656 /* 1657 * Skip sockets which we failed to bind. 1658 */ 1659 if (fd <= 0) 1660 return (nfds); 1661 1662 FD_SET(fd, fdset); 1663 if (fd > nfds) 1664 nfds = fd; 1665 return (nfds); 1666} 1667 1668static void 1669main_loop(struct conf *conf, bool dont_fork) 1670{ 1671 struct portal_group *pg; 1672 struct portal *portal; 1673 struct sockaddr_storage client_sa; 1674 socklen_t client_salen; 1675#ifdef ICL_KERNEL_PROXY 1676 int connection_id; 1677 int portal_id; 1678#endif 1679 fd_set fdset; 1680 int error, nfds, client_fd; 1681 1682 pidfile_write(conf->conf_pidfh); 1683 1684 for (;;) { 1685 if (sighup_received || sigterm_received) 1686 return; 1687 1688#ifdef ICL_KERNEL_PROXY 1689 if (proxy_mode) { 1690 client_salen = sizeof(client_sa); 1691 kernel_accept(&connection_id, &portal_id, 1692 (struct sockaddr *)&client_sa, &client_salen); 1693 1694 log_debugx("incoming connection, id %d, portal id %d", 1695 connection_id, portal_id); 1696 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1697 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 1698 if (portal->p_id == portal_id) { 1699 goto found; 1700 } 1701 } 1702 } 1703 1704 log_errx(1, "kernel returned invalid portal_id %d", 1705 portal_id); 1706 1707found: 1708 handle_connection(portal, connection_id, 1709 (struct sockaddr *)&client_sa, client_salen, 1710 dont_fork); 1711 } else { 1712#endif 1713 assert(proxy_mode == false); 1714 1715 FD_ZERO(&fdset); 1716 nfds = 0; 1717 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1718 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 1719 nfds = fd_add(portal->p_socket, &fdset, nfds); 1720 } 1721 error = select(nfds + 1, &fdset, NULL, NULL, NULL); 1722 if (error <= 0) { 1723 if (errno == EINTR) 1724 return; 1725 log_err(1, "select"); 1726 } 1727 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1728 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 1729 if (!FD_ISSET(portal->p_socket, &fdset)) 1730 continue; 1731 client_salen = sizeof(client_sa); 1732 client_fd = accept(portal->p_socket, 1733 (struct sockaddr *)&client_sa, 1734 &client_salen); 1735 if (client_fd < 0) 1736 log_err(1, "accept"); 1737 handle_connection(portal, client_fd, 1738 (struct sockaddr *)&client_sa, 1739 client_salen, dont_fork); 1740 break; 1741 } 1742 } 1743#ifdef ICL_KERNEL_PROXY 1744 } 1745#endif 1746 } 1747} 1748 1749static void 1750sighup_handler(int dummy __unused) 1751{ 1752 1753 sighup_received = true; 1754} 1755 1756static void 1757sigterm_handler(int dummy __unused) 1758{ 1759 1760 sigterm_received = true; 1761} 1762 1763static void 1764sigchld_handler(int dummy __unused) 1765{ 1766 1767 /* 1768 * The only purpose of this handler is to make SIGCHLD 1769 * interrupt the ISCSIDWAIT ioctl(2), so we can call 1770 * wait_for_children(). 1771 */ 1772} 1773 1774static void 1775register_signals(void) 1776{ 1777 struct sigaction sa; 1778 int error; 1779 1780 bzero(&sa, sizeof(sa)); 1781 sa.sa_handler = sighup_handler; 1782 sigfillset(&sa.sa_mask); 1783 error = sigaction(SIGHUP, &sa, NULL); 1784 if (error != 0) 1785 log_err(1, "sigaction"); 1786 1787 sa.sa_handler = sigterm_handler; 1788 error = sigaction(SIGTERM, &sa, NULL); 1789 if (error != 0) 1790 log_err(1, "sigaction"); 1791 1792 sa.sa_handler = sigterm_handler; 1793 error = sigaction(SIGINT, &sa, NULL); 1794 if (error != 0) 1795 log_err(1, "sigaction"); 1796 1797 sa.sa_handler = sigchld_handler; 1798 error = sigaction(SIGCHLD, &sa, NULL); 1799 if (error != 0) 1800 log_err(1, "sigaction"); 1801} 1802 1803int 1804main(int argc, char **argv) 1805{ 1806 struct conf *oldconf, *newconf, *tmpconf; 1807 const char *config_path = DEFAULT_CONFIG_PATH; 1808 int debug = 0, ch, error; 1809 bool dont_daemonize = false; 1810 1811 while ((ch = getopt(argc, argv, "df:R")) != -1) { 1812 switch (ch) { 1813 case 'd': 1814 dont_daemonize = true; 1815 debug++; 1816 break; 1817 case 'f': 1818 config_path = optarg; 1819 break; 1820 case 'R': 1821#ifndef ICL_KERNEL_PROXY 1822 log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY " 1823 "does not support iSER protocol"); 1824#endif 1825 proxy_mode = true; 1826 break; 1827 case '?': 1828 default: 1829 usage(); 1830 } 1831 } 1832 argc -= optind; 1833 if (argc != 0) 1834 usage(); 1835 1836 log_init(debug); 1837 kernel_init(); 1838 1839 oldconf = conf_new_from_kernel(); 1840 newconf = conf_new_from_file(config_path); 1841 if (newconf == NULL) 1842 log_errx(1, "configuration error; exiting"); 1843 if (debug > 0) { 1844 oldconf->conf_debug = debug; 1845 newconf->conf_debug = debug; 1846 } 1847 1848 error = conf_apply(oldconf, newconf); 1849 if (error != 0) 1850 log_errx(1, "failed to apply configuration; exiting"); 1851 1852 conf_delete(oldconf); 1853 oldconf = NULL; 1854 1855 register_signals(); 1856 1857 if (dont_daemonize == false) { 1858 log_debugx("daemonizing"); 1859 if (daemon(0, 0) == -1) { 1860 log_warn("cannot daemonize"); 1861 pidfile_remove(newconf->conf_pidfh); 1862 exit(1); 1863 } 1864 } 1865 1866 for (;;) { 1867 main_loop(newconf, dont_daemonize); 1868 if (sighup_received) { 1869 sighup_received = false; 1870 log_debugx("received SIGHUP, reloading configuration"); 1871 tmpconf = conf_new_from_file(config_path); 1872 if (tmpconf == NULL) { 1873 log_warnx("configuration error, " 1874 "continuing with old configuration"); 1875 } else { 1876 if (debug > 0) 1877 tmpconf->conf_debug = debug; 1878 oldconf = newconf; 1879 newconf = tmpconf; 1880 error = conf_apply(oldconf, newconf); 1881 if (error != 0) 1882 log_warnx("failed to reload " 1883 "configuration"); 1884 conf_delete(oldconf); 1885 oldconf = NULL; 1886 } 1887 } else if (sigterm_received) { 1888 log_debugx("exiting on signal; " 1889 "reloading empty configuration"); 1890 1891 log_debugx("disabling CTL iSCSI port " 1892 "and terminating all connections"); 1893 1894 oldconf = newconf; 1895 newconf = conf_new(); 1896 if (debug > 0) 1897 newconf->conf_debug = debug; 1898 error = conf_apply(oldconf, newconf); 1899 if (error != 0) 1900 log_warnx("failed to apply configuration"); 1901 1902 log_warnx("exiting on signal"); 1903 exit(0); 1904 } else { 1905 nchildren -= wait_for_children(false); 1906 assert(nchildren >= 0); 1907 } 1908 } 1909 /* NOTREACHED */ 1910} 1911