ctld.c revision 263721
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 263721 2014-03-25 12:06:42Z 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 51static volatile bool sighup_received = false; 52static volatile bool sigterm_received = false; 53static volatile bool sigalrm_received = false; 54 55static int nchildren = 0; 56 57static void 58usage(void) 59{ 60 61 fprintf(stderr, "usage: ctld [-d][-f config-file]\n"); 62 exit(1); 63} 64 65char * 66checked_strdup(const char *s) 67{ 68 char *c; 69 70 c = strdup(s); 71 if (c == NULL) 72 log_err(1, "strdup"); 73 return (c); 74} 75 76struct conf * 77conf_new(void) 78{ 79 struct conf *conf; 80 81 conf = calloc(1, sizeof(*conf)); 82 if (conf == NULL) 83 log_err(1, "calloc"); 84 TAILQ_INIT(&conf->conf_targets); 85 TAILQ_INIT(&conf->conf_auth_groups); 86 TAILQ_INIT(&conf->conf_portal_groups); 87 88 conf->conf_debug = 0; 89 conf->conf_timeout = 60; 90 conf->conf_maxproc = 30; 91 92 return (conf); 93} 94 95void 96conf_delete(struct conf *conf) 97{ 98 struct target *targ, *tmp; 99 struct auth_group *ag, *cagtmp; 100 struct portal_group *pg, *cpgtmp; 101 102 assert(conf->conf_pidfh == NULL); 103 104 TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp) 105 target_delete(targ); 106 TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp) 107 auth_group_delete(ag); 108 TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp) 109 portal_group_delete(pg); 110 free(conf->conf_pidfile_path); 111 free(conf); 112} 113 114static struct auth * 115auth_new(struct auth_group *ag) 116{ 117 struct auth *auth; 118 119 auth = calloc(1, sizeof(*auth)); 120 if (auth == NULL) 121 log_err(1, "calloc"); 122 auth->a_auth_group = ag; 123 TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next); 124 return (auth); 125} 126 127static void 128auth_delete(struct auth *auth) 129{ 130 TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next); 131 132 free(auth->a_user); 133 free(auth->a_secret); 134 free(auth->a_mutual_user); 135 free(auth->a_mutual_secret); 136 free(auth); 137} 138 139const struct auth * 140auth_find(struct auth_group *ag, const char *user) 141{ 142 const struct auth *auth; 143 144 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) { 145 if (strcmp(auth->a_user, user) == 0) 146 return (auth); 147 } 148 149 return (NULL); 150} 151 152static void 153auth_check_secret_length(struct auth *auth) 154{ 155 size_t len; 156 157 len = strlen(auth->a_secret); 158 if (len > 16) { 159 if (auth->a_auth_group->ag_name != NULL) 160 log_warnx("secret for user \"%s\", auth-group \"%s\", " 161 "is too long; it should be at most 16 characters " 162 "long", auth->a_user, auth->a_auth_group->ag_name); 163 else 164 log_warnx("secret for user \"%s\", target \"%s\", " 165 "is too long; it should be at most 16 characters " 166 "long", auth->a_user, 167 auth->a_auth_group->ag_target->t_iqn); 168 } 169 if (len < 12) { 170 if (auth->a_auth_group->ag_name != NULL) 171 log_warnx("secret for user \"%s\", auth-group \"%s\", " 172 "is too short; it should be at least 12 characters " 173 "long", auth->a_user, 174 auth->a_auth_group->ag_name); 175 else 176 log_warnx("secret for user \"%s\", target \"%s\", " 177 "is too short; it should be at least 16 characters " 178 "long", auth->a_user, 179 auth->a_auth_group->ag_target->t_iqn); 180 } 181 182 if (auth->a_mutual_secret != NULL) { 183 len = strlen(auth->a_secret); 184 if (len > 16) { 185 if (auth->a_auth_group->ag_name != NULL) 186 log_warnx("mutual secret for user \"%s\", " 187 "auth-group \"%s\", is too long; it should " 188 "be at most 16 characters long", 189 auth->a_user, auth->a_auth_group->ag_name); 190 else 191 log_warnx("mutual secret for user \"%s\", " 192 "target \"%s\", is too long; it should " 193 "be at most 16 characters long", 194 auth->a_user, 195 auth->a_auth_group->ag_target->t_iqn); 196 } 197 if (len < 12) { 198 if (auth->a_auth_group->ag_name != NULL) 199 log_warnx("mutual secret for user \"%s\", " 200 "auth-group \"%s\", is too short; it " 201 "should be at least 12 characters long", 202 auth->a_user, auth->a_auth_group->ag_name); 203 else 204 log_warnx("mutual secret for user \"%s\", " 205 "target \"%s\", is too short; it should be " 206 "at least 16 characters long", 207 auth->a_user, 208 auth->a_auth_group->ag_target->t_iqn); 209 } 210 } 211} 212 213const struct auth * 214auth_new_chap(struct auth_group *ag, const char *user, 215 const char *secret) 216{ 217 struct auth *auth; 218 219 if (ag->ag_type == AG_TYPE_UNKNOWN) 220 ag->ag_type = AG_TYPE_CHAP; 221 if (ag->ag_type != AG_TYPE_CHAP) { 222 if (ag->ag_name != NULL) 223 log_warnx("cannot mix \"chap\" authentication with " 224 "other types for auth-group \"%s\"", ag->ag_name); 225 else 226 log_warnx("cannot mix \"chap\" authentication with " 227 "other types for target \"%s\"", 228 ag->ag_target->t_iqn); 229 return (NULL); 230 } 231 232 auth = auth_new(ag); 233 auth->a_user = checked_strdup(user); 234 auth->a_secret = checked_strdup(secret); 235 236 auth_check_secret_length(auth); 237 238 return (auth); 239} 240 241const struct auth * 242auth_new_chap_mutual(struct auth_group *ag, const char *user, 243 const char *secret, const char *user2, const char *secret2) 244{ 245 struct auth *auth; 246 247 if (ag->ag_type == AG_TYPE_UNKNOWN) 248 ag->ag_type = AG_TYPE_CHAP_MUTUAL; 249 if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) { 250 if (ag->ag_name != NULL) 251 log_warnx("cannot mix \"chap-mutual\" authentication " 252 "with other types for auth-group \"%s\"", 253 ag->ag_name); 254 else 255 log_warnx("cannot mix \"chap-mutual\" authentication " 256 "with other types for target \"%s\"", 257 ag->ag_target->t_iqn); 258 return (NULL); 259 } 260 261 auth = auth_new(ag); 262 auth->a_user = checked_strdup(user); 263 auth->a_secret = checked_strdup(secret); 264 auth->a_mutual_user = checked_strdup(user2); 265 auth->a_mutual_secret = checked_strdup(secret2); 266 267 auth_check_secret_length(auth); 268 269 return (auth); 270} 271 272const struct auth_name * 273auth_name_new(struct auth_group *ag, const char *name) 274{ 275 struct auth_name *an; 276 277 an = calloc(1, sizeof(*an)); 278 if (an == NULL) 279 log_err(1, "calloc"); 280 an->an_auth_group = ag; 281 an->an_initator_name = checked_strdup(name); 282 TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next); 283 return (an); 284} 285 286static void 287auth_name_delete(struct auth_name *an) 288{ 289 TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next); 290 291 free(an->an_initator_name); 292 free(an); 293} 294 295bool 296auth_name_defined(const struct auth_group *ag) 297{ 298 if (TAILQ_EMPTY(&ag->ag_names)) 299 return (false); 300 return (true); 301} 302 303const struct auth_name * 304auth_name_find(const struct auth_group *ag, const char *name) 305{ 306 const struct auth_name *auth_name; 307 308 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) { 309 if (strcmp(auth_name->an_initator_name, name) == 0) 310 return (auth_name); 311 } 312 313 return (NULL); 314} 315 316const struct auth_portal * 317auth_portal_new(struct auth_group *ag, const char *portal) 318{ 319 struct auth_portal *ap; 320 321 ap = calloc(1, sizeof(*ap)); 322 if (ap == NULL) 323 log_err(1, "calloc"); 324 ap->ap_auth_group = ag; 325 ap->ap_initator_portal = checked_strdup(portal); 326 TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next); 327 return (ap); 328} 329 330static void 331auth_portal_delete(struct auth_portal *ap) 332{ 333 TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next); 334 335 free(ap->ap_initator_portal); 336 free(ap); 337} 338 339bool 340auth_portal_defined(const struct auth_group *ag) 341{ 342 if (TAILQ_EMPTY(&ag->ag_portals)) 343 return (false); 344 return (true); 345} 346 347const struct auth_portal * 348auth_portal_find(const struct auth_group *ag, const char *portal) 349{ 350 const struct auth_portal *auth_portal; 351 352 TAILQ_FOREACH(auth_portal, &ag->ag_portals, ap_next) { 353 if (strcmp(auth_portal->ap_initator_portal, portal) == 0) 354 return (auth_portal); 355 } 356 357 return (NULL); 358} 359 360struct auth_group * 361auth_group_new(struct conf *conf, const char *name) 362{ 363 struct auth_group *ag; 364 365 if (name != NULL) { 366 ag = auth_group_find(conf, name); 367 if (ag != NULL) { 368 log_warnx("duplicated auth-group \"%s\"", name); 369 return (NULL); 370 } 371 } 372 373 ag = calloc(1, sizeof(*ag)); 374 if (ag == NULL) 375 log_err(1, "calloc"); 376 if (name != NULL) 377 ag->ag_name = checked_strdup(name); 378 TAILQ_INIT(&ag->ag_auths); 379 TAILQ_INIT(&ag->ag_names); 380 TAILQ_INIT(&ag->ag_portals); 381 ag->ag_conf = conf; 382 TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next); 383 384 return (ag); 385} 386 387void 388auth_group_delete(struct auth_group *ag) 389{ 390 struct auth *auth, *auth_tmp; 391 struct auth_name *auth_name, *auth_name_tmp; 392 struct auth_portal *auth_portal, *auth_portal_tmp; 393 394 TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next); 395 396 TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp) 397 auth_delete(auth); 398 TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp) 399 auth_name_delete(auth_name); 400 TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next, 401 auth_portal_tmp) 402 auth_portal_delete(auth_portal); 403 free(ag->ag_name); 404 free(ag); 405} 406 407struct auth_group * 408auth_group_find(struct conf *conf, const char *name) 409{ 410 struct auth_group *ag; 411 412 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 413 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0) 414 return (ag); 415 } 416 417 return (NULL); 418} 419 420static struct portal * 421portal_new(struct portal_group *pg) 422{ 423 struct portal *portal; 424 425 portal = calloc(1, sizeof(*portal)); 426 if (portal == NULL) 427 log_err(1, "calloc"); 428 TAILQ_INIT(&portal->p_targets); 429 portal->p_portal_group = pg; 430 TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next); 431 return (portal); 432} 433 434static void 435portal_delete(struct portal *portal) 436{ 437 TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next); 438 freeaddrinfo(portal->p_ai); 439 free(portal->p_listen); 440 free(portal); 441} 442 443struct portal_group * 444portal_group_new(struct conf *conf, const char *name) 445{ 446 struct portal_group *pg; 447 448 pg = portal_group_find(conf, name); 449 if (pg != NULL) { 450 log_warnx("duplicated portal-group \"%s\"", name); 451 return (NULL); 452 } 453 454 pg = calloc(1, sizeof(*pg)); 455 if (pg == NULL) 456 log_err(1, "calloc"); 457 pg->pg_name = checked_strdup(name); 458 TAILQ_INIT(&pg->pg_portals); 459 pg->pg_conf = conf; 460 conf->conf_last_portal_group_tag++; 461 pg->pg_tag = conf->conf_last_portal_group_tag; 462 TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next); 463 464 return (pg); 465} 466 467void 468portal_group_delete(struct portal_group *pg) 469{ 470 struct portal *portal, *tmp; 471 472 TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next); 473 474 TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp) 475 portal_delete(portal); 476 free(pg->pg_name); 477 free(pg); 478} 479 480struct portal_group * 481portal_group_find(struct conf *conf, const char *name) 482{ 483 struct portal_group *pg; 484 485 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 486 if (strcmp(pg->pg_name, name) == 0) 487 return (pg); 488 } 489 490 return (NULL); 491} 492 493int 494portal_group_add_listen(struct portal_group *pg, const char *value, bool iser) 495{ 496 struct addrinfo hints; 497 struct portal *portal; 498 char *addr, *ch, *arg; 499 const char *port; 500 int error, colons = 0; 501 502#ifndef ICL_KERNEL_PROXY 503 if (iser) { 504 log_warnx("ctld(8) compiled without ICL_KERNEL_PROXY " 505 "does not support iSER protocol"); 506 return (-1); 507 } 508#endif 509 510 portal = portal_new(pg); 511 portal->p_listen = checked_strdup(value); 512 portal->p_iser = iser; 513 514 arg = portal->p_listen; 515 if (arg[0] == '\0') { 516 log_warnx("empty listen address"); 517 free(portal->p_listen); 518 free(portal); 519 return (1); 520 } 521 if (arg[0] == '[') { 522 /* 523 * IPv6 address in square brackets, perhaps with port. 524 */ 525 arg++; 526 addr = strsep(&arg, "]"); 527 if (arg == NULL) { 528 log_warnx("invalid listen address %s", 529 portal->p_listen); 530 free(portal->p_listen); 531 free(portal); 532 return (1); 533 } 534 if (arg[0] == '\0') { 535 port = "3260"; 536 } else if (arg[0] == ':') { 537 port = arg + 1; 538 } else { 539 log_warnx("invalid listen address %s", 540 portal->p_listen); 541 free(portal->p_listen); 542 free(portal); 543 return (1); 544 } 545 } else { 546 /* 547 * Either IPv6 address without brackets - and without 548 * a port - or IPv4 address. Just count the colons. 549 */ 550 for (ch = arg; *ch != '\0'; ch++) { 551 if (*ch == ':') 552 colons++; 553 } 554 if (colons > 1) { 555 addr = arg; 556 port = "3260"; 557 } else { 558 addr = strsep(&arg, ":"); 559 if (arg == NULL) 560 port = "3260"; 561 else 562 port = arg; 563 } 564 } 565 566 memset(&hints, 0, sizeof(hints)); 567 hints.ai_family = PF_UNSPEC; 568 hints.ai_socktype = SOCK_STREAM; 569 hints.ai_flags = AI_PASSIVE; 570 571 error = getaddrinfo(addr, port, &hints, &portal->p_ai); 572 if (error != 0) { 573 log_warnx("getaddrinfo for %s failed: %s", 574 portal->p_listen, gai_strerror(error)); 575 free(portal->p_listen); 576 free(portal); 577 return (1); 578 } 579 580 /* 581 * XXX: getaddrinfo(3) may return multiple addresses; we should turn 582 * those into multiple portals. 583 */ 584 585 return (0); 586} 587 588static bool 589valid_hex(const char ch) 590{ 591 switch (ch) { 592 case '0': 593 case '1': 594 case '2': 595 case '3': 596 case '4': 597 case '5': 598 case '6': 599 case '7': 600 case '8': 601 case '9': 602 case 'a': 603 case 'A': 604 case 'b': 605 case 'B': 606 case 'c': 607 case 'C': 608 case 'd': 609 case 'D': 610 case 'e': 611 case 'E': 612 case 'f': 613 case 'F': 614 return (true); 615 default: 616 return (false); 617 } 618} 619 620bool 621valid_iscsi_name(const char *name) 622{ 623 int i; 624 625 if (strlen(name) >= MAX_NAME_LEN) { 626 log_warnx("overlong name for target \"%s\"; max length allowed " 627 "by iSCSI specification is %d characters", 628 name, MAX_NAME_LEN); 629 return (false); 630 } 631 632 /* 633 * In the cases below, we don't return an error, just in case the admin 634 * was right, and we're wrong. 635 */ 636 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) { 637 for (i = strlen("iqn."); name[i] != '\0'; i++) { 638 /* 639 * XXX: We should verify UTF-8 normalisation, as defined 640 * by 3.2.6.2: iSCSI Name Encoding. 641 */ 642 if (isalnum(name[i])) 643 continue; 644 if (name[i] == '-' || name[i] == '.' || name[i] == ':') 645 continue; 646 log_warnx("invalid character \"%c\" in target name " 647 "\"%s\"; allowed characters are letters, digits, " 648 "'-', '.', and ':'", name[i], name); 649 break; 650 } 651 /* 652 * XXX: Check more stuff: valid date and a valid reversed domain. 653 */ 654 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) { 655 if (strlen(name) != strlen("eui.") + 16) 656 log_warnx("invalid target name \"%s\"; the \"eui.\" " 657 "should be followed by exactly 16 hexadecimal " 658 "digits", name); 659 for (i = strlen("eui."); name[i] != '\0'; i++) { 660 if (!valid_hex(name[i])) { 661 log_warnx("invalid character \"%c\" in target " 662 "name \"%s\"; allowed characters are 1-9 " 663 "and A-F", name[i], name); 664 break; 665 } 666 } 667 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) { 668 if (strlen(name) > strlen("naa.") + 32) 669 log_warnx("invalid target name \"%s\"; the \"naa.\" " 670 "should be followed by at most 32 hexadecimal " 671 "digits", name); 672 for (i = strlen("naa."); name[i] != '\0'; i++) { 673 if (!valid_hex(name[i])) { 674 log_warnx("invalid character \"%c\" in target " 675 "name \"%s\"; allowed characters are 1-9 " 676 "and A-F", name[i], name); 677 break; 678 } 679 } 680 } else { 681 log_warnx("invalid target name \"%s\"; should start with " 682 "either \".iqn\", \"eui.\", or \"naa.\"", 683 name); 684 } 685 return (true); 686} 687 688struct target * 689target_new(struct conf *conf, const char *iqn) 690{ 691 struct target *targ; 692 int i, len; 693 694 targ = target_find(conf, iqn); 695 if (targ != NULL) { 696 log_warnx("duplicated target \"%s\"", iqn); 697 return (NULL); 698 } 699 if (valid_iscsi_name(iqn) == false) { 700 log_warnx("target name \"%s\" is invalid", iqn); 701 return (NULL); 702 } 703 targ = calloc(1, sizeof(*targ)); 704 if (targ == NULL) 705 log_err(1, "calloc"); 706 targ->t_iqn = checked_strdup(iqn); 707 708 /* 709 * RFC 3722 requires us to normalize the name to lowercase. 710 */ 711 len = strlen(iqn); 712 for (i = 0; i < len; i++) 713 targ->t_iqn[i] = tolower(targ->t_iqn[i]); 714 715 TAILQ_INIT(&targ->t_luns); 716 targ->t_conf = conf; 717 TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next); 718 719 return (targ); 720} 721 722void 723target_delete(struct target *targ) 724{ 725 struct lun *lun, *tmp; 726 727 TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next); 728 729 TAILQ_FOREACH_SAFE(lun, &targ->t_luns, l_next, tmp) 730 lun_delete(lun); 731 free(targ->t_iqn); 732 free(targ); 733} 734 735struct target * 736target_find(struct conf *conf, const char *iqn) 737{ 738 struct target *targ; 739 740 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 741 if (strcasecmp(targ->t_iqn, iqn) == 0) 742 return (targ); 743 } 744 745 return (NULL); 746} 747 748struct lun * 749lun_new(struct target *targ, int lun_id) 750{ 751 struct lun *lun; 752 753 lun = lun_find(targ, lun_id); 754 if (lun != NULL) { 755 log_warnx("duplicated lun %d for target \"%s\"", 756 lun_id, targ->t_iqn); 757 return (NULL); 758 } 759 760 lun = calloc(1, sizeof(*lun)); 761 if (lun == NULL) 762 log_err(1, "calloc"); 763 lun->l_lun = lun_id; 764 TAILQ_INIT(&lun->l_options); 765 lun->l_target = targ; 766 TAILQ_INSERT_TAIL(&targ->t_luns, lun, l_next); 767 768 return (lun); 769} 770 771void 772lun_delete(struct lun *lun) 773{ 774 struct lun_option *lo, *tmp; 775 776 TAILQ_REMOVE(&lun->l_target->t_luns, lun, l_next); 777 778 TAILQ_FOREACH_SAFE(lo, &lun->l_options, lo_next, tmp) 779 lun_option_delete(lo); 780 free(lun->l_backend); 781 free(lun->l_device_id); 782 free(lun->l_path); 783 free(lun->l_serial); 784 free(lun); 785} 786 787struct lun * 788lun_find(struct target *targ, int lun_id) 789{ 790 struct lun *lun; 791 792 TAILQ_FOREACH(lun, &targ->t_luns, l_next) { 793 if (lun->l_lun == lun_id) 794 return (lun); 795 } 796 797 return (NULL); 798} 799 800void 801lun_set_backend(struct lun *lun, const char *value) 802{ 803 free(lun->l_backend); 804 lun->l_backend = checked_strdup(value); 805} 806 807void 808lun_set_blocksize(struct lun *lun, size_t value) 809{ 810 811 lun->l_blocksize = value; 812} 813 814void 815lun_set_device_id(struct lun *lun, const char *value) 816{ 817 free(lun->l_device_id); 818 lun->l_device_id = checked_strdup(value); 819} 820 821void 822lun_set_path(struct lun *lun, const char *value) 823{ 824 free(lun->l_path); 825 lun->l_path = checked_strdup(value); 826} 827 828void 829lun_set_serial(struct lun *lun, const char *value) 830{ 831 free(lun->l_serial); 832 lun->l_serial = checked_strdup(value); 833} 834 835void 836lun_set_size(struct lun *lun, size_t value) 837{ 838 839 lun->l_size = value; 840} 841 842void 843lun_set_ctl_lun(struct lun *lun, uint32_t value) 844{ 845 846 lun->l_ctl_lun = value; 847} 848 849struct lun_option * 850lun_option_new(struct lun *lun, const char *name, const char *value) 851{ 852 struct lun_option *lo; 853 854 lo = lun_option_find(lun, name); 855 if (lo != NULL) { 856 log_warnx("duplicated lun option %s for lun %d, target \"%s\"", 857 name, lun->l_lun, lun->l_target->t_iqn); 858 return (NULL); 859 } 860 861 lo = calloc(1, sizeof(*lo)); 862 if (lo == NULL) 863 log_err(1, "calloc"); 864 lo->lo_name = checked_strdup(name); 865 lo->lo_value = checked_strdup(value); 866 lo->lo_lun = lun; 867 TAILQ_INSERT_TAIL(&lun->l_options, lo, lo_next); 868 869 return (lo); 870} 871 872void 873lun_option_delete(struct lun_option *lo) 874{ 875 876 TAILQ_REMOVE(&lo->lo_lun->l_options, lo, lo_next); 877 878 free(lo->lo_name); 879 free(lo->lo_value); 880 free(lo); 881} 882 883struct lun_option * 884lun_option_find(struct lun *lun, const char *name) 885{ 886 struct lun_option *lo; 887 888 TAILQ_FOREACH(lo, &lun->l_options, lo_next) { 889 if (strcmp(lo->lo_name, name) == 0) 890 return (lo); 891 } 892 893 return (NULL); 894} 895 896void 897lun_option_set(struct lun_option *lo, const char *value) 898{ 899 900 free(lo->lo_value); 901 lo->lo_value = checked_strdup(value); 902} 903 904static struct connection * 905connection_new(struct portal *portal, int fd, const char *host) 906{ 907 struct connection *conn; 908 909 conn = calloc(1, sizeof(*conn)); 910 if (conn == NULL) 911 log_err(1, "calloc"); 912 conn->conn_portal = portal; 913 conn->conn_socket = fd; 914 conn->conn_initiator_addr = checked_strdup(host); 915 916 /* 917 * Default values, from RFC 3720, section 12. 918 */ 919 conn->conn_max_data_segment_length = 8192; 920 conn->conn_max_burst_length = 262144; 921 conn->conn_immediate_data = true; 922 923 return (conn); 924} 925 926#if 0 927static void 928conf_print(struct conf *conf) 929{ 930 struct auth_group *ag; 931 struct auth *auth; 932 struct auth_name *auth_name; 933 struct auth_portal *auth_portal; 934 struct portal_group *pg; 935 struct portal *portal; 936 struct target *targ; 937 struct lun *lun; 938 struct lun_option *lo; 939 940 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 941 fprintf(stderr, "auth-group %s {\n", ag->ag_name); 942 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) 943 fprintf(stderr, "\t chap-mutual %s %s %s %s\n", 944 auth->a_user, auth->a_secret, 945 auth->a_mutual_user, auth->a_mutual_secret); 946 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) 947 fprintf(stderr, "\t initiator-name %s\n", 948 auth_name->an_initator_name); 949 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next) 950 fprintf(stderr, "\t initiator-portal %s\n", 951 auth_portal->an_initator_portal); 952 fprintf(stderr, "}\n"); 953 } 954 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 955 fprintf(stderr, "portal-group %s {\n", pg->pg_name); 956 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 957 fprintf(stderr, "\t listen %s\n", portal->p_listen); 958 fprintf(stderr, "}\n"); 959 } 960 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 961 fprintf(stderr, "target %s {\n", targ->t_iqn); 962 if (targ->t_alias != NULL) 963 fprintf(stderr, "\t alias %s\n", targ->t_alias); 964 TAILQ_FOREACH(lun, &targ->t_luns, l_next) { 965 fprintf(stderr, "\tlun %d {\n", lun->l_lun); 966 fprintf(stderr, "\t\tpath %s\n", lun->l_path); 967 TAILQ_FOREACH(lo, &lun->l_options, lo_next) 968 fprintf(stderr, "\t\toption %s %s\n", 969 lo->lo_name, lo->lo_value); 970 fprintf(stderr, "\t}\n"); 971 } 972 fprintf(stderr, "}\n"); 973 } 974} 975#endif 976 977static int 978conf_verify_lun(struct lun *lun) 979{ 980 const struct lun *lun2; 981 const struct target *targ2; 982 983 if (lun->l_backend == NULL) 984 lun_set_backend(lun, "block"); 985 if (strcmp(lun->l_backend, "block") == 0) { 986 if (lun->l_path == NULL) { 987 log_warnx("missing path for lun %d, target \"%s\"", 988 lun->l_lun, lun->l_target->t_iqn); 989 return (1); 990 } 991 } else if (strcmp(lun->l_backend, "ramdisk") == 0) { 992 if (lun->l_size == 0) { 993 log_warnx("missing size for ramdisk-backed lun %d, " 994 "target \"%s\"", lun->l_lun, lun->l_target->t_iqn); 995 return (1); 996 } 997 if (lun->l_path != NULL) { 998 log_warnx("path must not be specified " 999 "for ramdisk-backed lun %d, target \"%s\"", 1000 lun->l_lun, lun->l_target->t_iqn); 1001 return (1); 1002 } 1003 } 1004 if (lun->l_lun < 0 || lun->l_lun > 255) { 1005 log_warnx("invalid lun number for lun %d, target \"%s\"; " 1006 "must be between 0 and 255", lun->l_lun, 1007 lun->l_target->t_iqn); 1008 return (1); 1009 } 1010 if (lun->l_blocksize == 0) { 1011 lun_set_blocksize(lun, DEFAULT_BLOCKSIZE); 1012 } else if (lun->l_blocksize < 0) { 1013 log_warnx("invalid blocksize for lun %d, target \"%s\"; " 1014 "must be larger than 0", lun->l_lun, lun->l_target->t_iqn); 1015 return (1); 1016 } 1017 if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) { 1018 log_warnx("invalid size for lun %d, target \"%s\"; " 1019 "must be multiple of blocksize", lun->l_lun, 1020 lun->l_target->t_iqn); 1021 return (1); 1022 } 1023 TAILQ_FOREACH(targ2, &lun->l_target->t_conf->conf_targets, t_next) { 1024 TAILQ_FOREACH(lun2, &targ2->t_luns, l_next) { 1025 if (lun == lun2) 1026 continue; 1027 if (lun->l_path != NULL && lun2->l_path != NULL && 1028 strcmp(lun->l_path, lun2->l_path) == 0) { 1029 log_debugx("WARNING: path \"%s\" duplicated " 1030 "between lun %d, target \"%s\", and " 1031 "lun %d, target \"%s\"", lun->l_path, 1032 lun->l_lun, lun->l_target->t_iqn, 1033 lun2->l_lun, lun2->l_target->t_iqn); 1034 } 1035 } 1036 } 1037 1038 return (0); 1039} 1040 1041int 1042conf_verify(struct conf *conf) 1043{ 1044 struct auth_group *ag; 1045 struct portal_group *pg; 1046 struct target *targ; 1047 struct lun *lun; 1048 bool found_lun0; 1049 int error; 1050 1051 if (conf->conf_pidfile_path == NULL) 1052 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE); 1053 1054 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1055 if (targ->t_auth_group == NULL) { 1056 log_warnx("missing authentication for target \"%s\"; " 1057 "must specify either \"auth-group\", \"chap\", " 1058 "or \"chap-mutual\"", targ->t_iqn); 1059 return (1); 1060 } 1061 if (targ->t_portal_group == NULL) { 1062 targ->t_portal_group = portal_group_find(conf, 1063 "default"); 1064 assert(targ->t_portal_group != NULL); 1065 } 1066 found_lun0 = false; 1067 TAILQ_FOREACH(lun, &targ->t_luns, l_next) { 1068 error = conf_verify_lun(lun); 1069 if (error != 0) 1070 return (error); 1071 if (lun->l_lun == 0) 1072 found_lun0 = true; 1073 } 1074 if (!found_lun0) { 1075 log_warnx("mandatory LUN 0 not configured " 1076 "for target \"%s\"", targ->t_iqn); 1077 return (1); 1078 } 1079 } 1080 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1081 assert(pg->pg_name != NULL); 1082 if (pg->pg_discovery_auth_group == NULL) { 1083 pg->pg_discovery_auth_group = 1084 auth_group_find(conf, "no-access"); 1085 assert(pg->pg_discovery_auth_group != NULL); 1086 } 1087 1088 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1089 if (targ->t_portal_group == pg) 1090 break; 1091 } 1092 if (targ == NULL) { 1093 if (strcmp(pg->pg_name, "default") != 0) 1094 log_warnx("portal-group \"%s\" not assigned " 1095 "to any target", pg->pg_name); 1096 pg->pg_unassigned = true; 1097 } else 1098 pg->pg_unassigned = false; 1099 } 1100 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) { 1101 if (ag->ag_name == NULL) 1102 assert(ag->ag_target != NULL); 1103 else 1104 assert(ag->ag_target == NULL); 1105 1106 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) { 1107 if (targ->t_auth_group == ag) 1108 break; 1109 } 1110 if (targ == NULL && ag->ag_name != NULL && 1111 strcmp(ag->ag_name, "no-authentication") != 0 && 1112 strcmp(ag->ag_name, "no-access") != 0) { 1113 log_warnx("auth-group \"%s\" not assigned " 1114 "to any target", ag->ag_name); 1115 } 1116 } 1117 1118 return (0); 1119} 1120 1121static int 1122conf_apply(struct conf *oldconf, struct conf *newconf) 1123{ 1124 struct target *oldtarg, *newtarg, *tmptarg; 1125 struct lun *oldlun, *newlun, *tmplun; 1126 struct portal_group *oldpg, *newpg; 1127 struct portal *oldp, *newp; 1128 pid_t otherpid; 1129 int changed, cumulated_error = 0, error; 1130#ifndef ICL_KERNEL_PROXY 1131 int one = 1; 1132#endif 1133 1134 if (oldconf->conf_debug != newconf->conf_debug) { 1135 log_debugx("changing debug level to %d", newconf->conf_debug); 1136 log_init(newconf->conf_debug); 1137 } 1138 1139 if (oldconf->conf_pidfh != NULL) { 1140 assert(oldconf->conf_pidfile_path != NULL); 1141 if (newconf->conf_pidfile_path != NULL && 1142 strcmp(oldconf->conf_pidfile_path, 1143 newconf->conf_pidfile_path) == 0) { 1144 newconf->conf_pidfh = oldconf->conf_pidfh; 1145 oldconf->conf_pidfh = NULL; 1146 } else { 1147 log_debugx("removing pidfile %s", 1148 oldconf->conf_pidfile_path); 1149 pidfile_remove(oldconf->conf_pidfh); 1150 oldconf->conf_pidfh = NULL; 1151 } 1152 } 1153 1154 if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) { 1155 log_debugx("opening pidfile %s", newconf->conf_pidfile_path); 1156 newconf->conf_pidfh = 1157 pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid); 1158 if (newconf->conf_pidfh == NULL) { 1159 if (errno == EEXIST) 1160 log_errx(1, "daemon already running, pid: %jd.", 1161 (intmax_t)otherpid); 1162 log_err(1, "cannot open or create pidfile \"%s\"", 1163 newconf->conf_pidfile_path); 1164 } 1165 } 1166 1167 TAILQ_FOREACH_SAFE(oldtarg, &oldconf->conf_targets, t_next, tmptarg) { 1168 /* 1169 * First, remove any targets present in the old configuration 1170 * and missing in the new one. 1171 */ 1172 newtarg = target_find(newconf, oldtarg->t_iqn); 1173 if (newtarg == NULL) { 1174 TAILQ_FOREACH_SAFE(oldlun, &oldtarg->t_luns, l_next, 1175 tmplun) { 1176 log_debugx("target %s not found in new " 1177 "configuration; removing its lun %d, " 1178 "backed by CTL lun %d", 1179 oldtarg->t_iqn, oldlun->l_lun, 1180 oldlun->l_ctl_lun); 1181 error = kernel_lun_remove(oldlun); 1182 if (error != 0) { 1183 log_warnx("failed to remove lun %d, " 1184 "target %s, CTL lun %d", 1185 oldlun->l_lun, oldtarg->t_iqn, 1186 oldlun->l_ctl_lun); 1187 cumulated_error++; 1188 } 1189 lun_delete(oldlun); 1190 } 1191 target_delete(oldtarg); 1192 continue; 1193 } 1194 1195 /* 1196 * Second, remove any LUNs present in the old target 1197 * and missing in the new one. 1198 */ 1199 TAILQ_FOREACH_SAFE(oldlun, &oldtarg->t_luns, l_next, tmplun) { 1200 newlun = lun_find(newtarg, oldlun->l_lun); 1201 if (newlun == NULL) { 1202 log_debugx("lun %d, target %s, CTL lun %d " 1203 "not found in new configuration; " 1204 "removing", oldlun->l_lun, oldtarg->t_iqn, 1205 oldlun->l_ctl_lun); 1206 error = kernel_lun_remove(oldlun); 1207 if (error != 0) { 1208 log_warnx("failed to remove lun %d, " 1209 "target %s, CTL lun %d", 1210 oldlun->l_lun, oldtarg->t_iqn, 1211 oldlun->l_ctl_lun); 1212 cumulated_error++; 1213 } 1214 lun_delete(oldlun); 1215 continue; 1216 } 1217 1218 /* 1219 * Also remove the LUNs changed by more than size. 1220 */ 1221 changed = 0; 1222 assert(oldlun->l_backend != NULL); 1223 assert(newlun->l_backend != NULL); 1224 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) { 1225 log_debugx("backend for lun %d, target %s, " 1226 "CTL lun %d changed; removing", 1227 oldlun->l_lun, oldtarg->t_iqn, 1228 oldlun->l_ctl_lun); 1229 changed = 1; 1230 } 1231 if (oldlun->l_blocksize != newlun->l_blocksize) { 1232 log_debugx("blocksize for lun %d, target %s, " 1233 "CTL lun %d changed; removing", 1234 oldlun->l_lun, oldtarg->t_iqn, 1235 oldlun->l_ctl_lun); 1236 changed = 1; 1237 } 1238 if (newlun->l_device_id != NULL && 1239 (oldlun->l_device_id == NULL || 1240 strcmp(oldlun->l_device_id, newlun->l_device_id) != 1241 0)) { 1242 log_debugx("device-id for lun %d, target %s, " 1243 "CTL lun %d changed; removing", 1244 oldlun->l_lun, oldtarg->t_iqn, 1245 oldlun->l_ctl_lun); 1246 changed = 1; 1247 } 1248 if (newlun->l_path != NULL && 1249 (oldlun->l_path == NULL || 1250 strcmp(oldlun->l_path, newlun->l_path) != 0)) { 1251 log_debugx("path for lun %d, target %s, " 1252 "CTL lun %d, changed; removing", 1253 oldlun->l_lun, oldtarg->t_iqn, 1254 oldlun->l_ctl_lun); 1255 changed = 1; 1256 } 1257 if (newlun->l_serial != NULL && 1258 (oldlun->l_serial == NULL || 1259 strcmp(oldlun->l_serial, newlun->l_serial) != 0)) { 1260 log_debugx("serial for lun %d, target %s, " 1261 "CTL lun %d changed; removing", 1262 oldlun->l_lun, oldtarg->t_iqn, 1263 oldlun->l_ctl_lun); 1264 changed = 1; 1265 } 1266 if (changed) { 1267 error = kernel_lun_remove(oldlun); 1268 if (error != 0) { 1269 log_warnx("failed to remove lun %d, " 1270 "target %s, CTL lun %d", 1271 oldlun->l_lun, oldtarg->t_iqn, 1272 oldlun->l_ctl_lun); 1273 cumulated_error++; 1274 } 1275 lun_delete(oldlun); 1276 continue; 1277 } 1278 1279 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun); 1280 } 1281 } 1282 1283 /* 1284 * Now add new targets or modify existing ones. 1285 */ 1286 TAILQ_FOREACH(newtarg, &newconf->conf_targets, t_next) { 1287 oldtarg = target_find(oldconf, newtarg->t_iqn); 1288 1289 TAILQ_FOREACH(newlun, &newtarg->t_luns, l_next) { 1290 if (oldtarg != NULL) { 1291 oldlun = lun_find(oldtarg, newlun->l_lun); 1292 if (oldlun != NULL) { 1293 if (newlun->l_size != oldlun->l_size) { 1294 log_debugx("resizing lun %d, " 1295 "target %s, CTL lun %d", 1296 newlun->l_lun, 1297 newtarg->t_iqn, 1298 newlun->l_ctl_lun); 1299 error = 1300 kernel_lun_resize(newlun); 1301 if (error != 0) { 1302 log_warnx("failed to " 1303 "resize lun %d, " 1304 "target %s, " 1305 "CTL lun %d", 1306 newlun->l_lun, 1307 newtarg->t_iqn, 1308 newlun->l_lun); 1309 cumulated_error++; 1310 } 1311 } 1312 continue; 1313 } 1314 } 1315 log_debugx("adding lun %d, target %s", 1316 newlun->l_lun, newtarg->t_iqn); 1317 error = kernel_lun_add(newlun); 1318 if (error != 0) { 1319 log_warnx("failed to add lun %d, target %s", 1320 newlun->l_lun, newtarg->t_iqn); 1321 cumulated_error++; 1322 } 1323 } 1324 } 1325 1326 /* 1327 * Go through the new portals, opening the sockets as neccessary. 1328 */ 1329 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) { 1330 if (newpg->pg_unassigned) { 1331 log_debugx("not listening on portal-group \"%s\", " 1332 "not assigned to any target", 1333 newpg->pg_name); 1334 continue; 1335 } 1336 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) { 1337 /* 1338 * Try to find already open portal and reuse 1339 * the listening socket. We don't care about 1340 * what portal or portal group that was, what 1341 * matters is the listening address. 1342 */ 1343 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, 1344 pg_next) { 1345 TAILQ_FOREACH(oldp, &oldpg->pg_portals, 1346 p_next) { 1347 if (strcmp(newp->p_listen, 1348 oldp->p_listen) == 0 && 1349 oldp->p_socket > 0) { 1350 newp->p_socket = 1351 oldp->p_socket; 1352 oldp->p_socket = 0; 1353 break; 1354 } 1355 } 1356 } 1357 if (newp->p_socket > 0) { 1358 /* 1359 * We're done with this portal. 1360 */ 1361 continue; 1362 } 1363 1364#ifdef ICL_KERNEL_PROXY 1365 log_debugx("listening on %s, portal-group \"%s\" using ICL proxy", 1366 newp->p_listen, newpg->pg_name); 1367 kernel_listen(newp->p_ai, newp->p_iser); 1368#else 1369 assert(newp->p_iser == false); 1370 1371 log_debugx("listening on %s, portal-group \"%s\"", 1372 newp->p_listen, newpg->pg_name); 1373 newp->p_socket = socket(newp->p_ai->ai_family, 1374 newp->p_ai->ai_socktype, 1375 newp->p_ai->ai_protocol); 1376 if (newp->p_socket < 0) { 1377 log_warn("socket(2) failed for %s", 1378 newp->p_listen); 1379 cumulated_error++; 1380 continue; 1381 } 1382 error = setsockopt(newp->p_socket, SOL_SOCKET, 1383 SO_REUSEADDR, &one, sizeof(one)); 1384 if (error != 0) { 1385 log_warn("setsockopt(SO_REUSEADDR) failed " 1386 "for %s", newp->p_listen); 1387 close(newp->p_socket); 1388 newp->p_socket = 0; 1389 cumulated_error++; 1390 continue; 1391 } 1392 error = bind(newp->p_socket, newp->p_ai->ai_addr, 1393 newp->p_ai->ai_addrlen); 1394 if (error != 0) { 1395 log_warn("bind(2) failed for %s", 1396 newp->p_listen); 1397 close(newp->p_socket); 1398 newp->p_socket = 0; 1399 cumulated_error++; 1400 continue; 1401 } 1402 error = listen(newp->p_socket, -1); 1403 if (error != 0) { 1404 log_warn("listen(2) failed for %s", 1405 newp->p_listen); 1406 close(newp->p_socket); 1407 newp->p_socket = 0; 1408 cumulated_error++; 1409 continue; 1410 } 1411#endif /* !ICL_KERNEL_PROXY */ 1412 } 1413 } 1414 1415 /* 1416 * Go through the no longer used sockets, closing them. 1417 */ 1418 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) { 1419 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) { 1420 if (oldp->p_socket <= 0) 1421 continue; 1422 log_debugx("closing socket for %s, portal-group \"%s\"", 1423 oldp->p_listen, oldpg->pg_name); 1424 close(oldp->p_socket); 1425 oldp->p_socket = 0; 1426 } 1427 } 1428 1429 return (cumulated_error); 1430} 1431 1432bool 1433timed_out(void) 1434{ 1435 1436 return (sigalrm_received); 1437} 1438 1439static void 1440sigalrm_handler(int dummy __unused) 1441{ 1442 /* 1443 * It would be easiest to just log an error and exit. We can't 1444 * do this, though, because log_errx() is not signal safe, since 1445 * it calls syslog(3). Instead, set a flag checked by pdu_send() 1446 * and pdu_receive(), to call log_errx() there. Should they fail 1447 * to notice, we'll exit here one second later. 1448 */ 1449 if (sigalrm_received) { 1450 /* 1451 * Oh well. Just give up and quit. 1452 */ 1453 _exit(2); 1454 } 1455 1456 sigalrm_received = true; 1457} 1458 1459static void 1460set_timeout(const struct conf *conf) 1461{ 1462 struct sigaction sa; 1463 struct itimerval itv; 1464 int error; 1465 1466 if (conf->conf_timeout <= 0) { 1467 log_debugx("session timeout disabled"); 1468 return; 1469 } 1470 1471 bzero(&sa, sizeof(sa)); 1472 sa.sa_handler = sigalrm_handler; 1473 sigfillset(&sa.sa_mask); 1474 error = sigaction(SIGALRM, &sa, NULL); 1475 if (error != 0) 1476 log_err(1, "sigaction"); 1477 1478 /* 1479 * First SIGALRM will arive after conf_timeout seconds. 1480 * If we do nothing, another one will arrive a second later. 1481 */ 1482 bzero(&itv, sizeof(itv)); 1483 itv.it_interval.tv_sec = 1; 1484 itv.it_value.tv_sec = conf->conf_timeout; 1485 1486 log_debugx("setting session timeout to %d seconds", 1487 conf->conf_timeout); 1488 error = setitimer(ITIMER_REAL, &itv, NULL); 1489 if (error != 0) 1490 log_err(1, "setitimer"); 1491} 1492 1493static int 1494wait_for_children(bool block) 1495{ 1496 pid_t pid; 1497 int status; 1498 int num = 0; 1499 1500 for (;;) { 1501 /* 1502 * If "block" is true, wait for at least one process. 1503 */ 1504 if (block && num == 0) 1505 pid = wait4(-1, &status, 0, NULL); 1506 else 1507 pid = wait4(-1, &status, WNOHANG, NULL); 1508 if (pid <= 0) 1509 break; 1510 if (WIFSIGNALED(status)) { 1511 log_warnx("child process %d terminated with signal %d", 1512 pid, WTERMSIG(status)); 1513 } else if (WEXITSTATUS(status) != 0) { 1514 log_warnx("child process %d terminated with exit status %d", 1515 pid, WEXITSTATUS(status)); 1516 } else { 1517 log_debugx("child process %d terminated gracefully", pid); 1518 } 1519 num++; 1520 } 1521 1522 return (num); 1523} 1524 1525static void 1526handle_connection(struct portal *portal, int fd, bool dont_fork) 1527{ 1528 struct connection *conn; 1529#ifndef ICL_KERNEL_PROXY 1530 struct sockaddr_storage ss; 1531 socklen_t sslen = sizeof(ss); 1532 int error; 1533#endif 1534 pid_t pid; 1535 char host[NI_MAXHOST + 1]; 1536 struct conf *conf; 1537 1538 conf = portal->p_portal_group->pg_conf; 1539 1540 if (dont_fork) { 1541 log_debugx("incoming connection; not forking due to -d flag"); 1542 } else { 1543 nchildren -= wait_for_children(false); 1544 assert(nchildren >= 0); 1545 1546 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) { 1547 log_debugx("maxproc limit of %d child processes hit; " 1548 "waiting for child process to exit", conf->conf_maxproc); 1549 nchildren -= wait_for_children(true); 1550 assert(nchildren >= 0); 1551 } 1552 log_debugx("incoming connection; forking child process #%d", 1553 nchildren); 1554 nchildren++; 1555 pid = fork(); 1556 if (pid < 0) 1557 log_err(1, "fork"); 1558 if (pid > 0) { 1559 close(fd); 1560 return; 1561 } 1562 } 1563 pidfile_close(conf->conf_pidfh); 1564 1565#ifdef ICL_KERNEL_PROXY 1566 /* 1567 * XXX 1568 */ 1569 log_set_peer_addr("XXX"); 1570#else 1571 error = getpeername(fd, (struct sockaddr *)&ss, &sslen); 1572 if (error != 0) 1573 log_err(1, "getpeername"); 1574 error = getnameinfo((struct sockaddr *)&ss, sslen, 1575 host, sizeof(host), NULL, 0, NI_NUMERICHOST); 1576 if (error != 0) 1577 log_errx(1, "getaddrinfo: %s", gai_strerror(error)); 1578 1579 log_debugx("accepted connection from %s; portal group \"%s\"", 1580 host, portal->p_portal_group->pg_name); 1581 log_set_peer_addr(host); 1582 setproctitle("%s", host); 1583#endif 1584 1585 conn = connection_new(portal, fd, host); 1586 set_timeout(conf); 1587 kernel_capsicate(); 1588 login(conn); 1589 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) { 1590 kernel_handoff(conn); 1591 log_debugx("connection handed off to the kernel"); 1592 } else { 1593 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY); 1594 discovery(conn); 1595 } 1596 log_debugx("nothing more to do; exiting"); 1597 exit(0); 1598} 1599 1600#ifndef ICL_KERNEL_PROXY 1601static int 1602fd_add(int fd, fd_set *fdset, int nfds) 1603{ 1604 1605 /* 1606 * Skip sockets which we failed to bind. 1607 */ 1608 if (fd <= 0) 1609 return (nfds); 1610 1611 FD_SET(fd, fdset); 1612 if (fd > nfds) 1613 nfds = fd; 1614 return (nfds); 1615} 1616#endif 1617 1618static void 1619main_loop(struct conf *conf, bool dont_fork) 1620{ 1621 struct portal_group *pg; 1622 struct portal *portal; 1623#ifdef ICL_KERNEL_PROXY 1624 int connection_id; 1625#else 1626 fd_set fdset; 1627 int error, nfds, client_fd; 1628#endif 1629 1630 pidfile_write(conf->conf_pidfh); 1631 1632 for (;;) { 1633 if (sighup_received || sigterm_received) 1634 return; 1635 1636#ifdef ICL_KERNEL_PROXY 1637 connection_id = kernel_accept(); 1638 if (connection_id == 0) 1639 continue; 1640 1641 /* 1642 * XXX: This is obviously temporary. 1643 */ 1644 pg = TAILQ_FIRST(&conf->conf_portal_groups); 1645 portal = TAILQ_FIRST(&pg->pg_portals); 1646 1647 handle_connection(portal, connection_id, dont_fork); 1648#else 1649 FD_ZERO(&fdset); 1650 nfds = 0; 1651 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1652 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) 1653 nfds = fd_add(portal->p_socket, &fdset, nfds); 1654 } 1655 error = select(nfds + 1, &fdset, NULL, NULL, NULL); 1656 if (error <= 0) { 1657 if (errno == EINTR) 1658 return; 1659 log_err(1, "select"); 1660 } 1661 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) { 1662 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) { 1663 if (!FD_ISSET(portal->p_socket, &fdset)) 1664 continue; 1665 client_fd = accept(portal->p_socket, NULL, 0); 1666 if (client_fd < 0) 1667 log_err(1, "accept"); 1668 handle_connection(portal, client_fd, dont_fork); 1669 break; 1670 } 1671 } 1672#endif /* !ICL_KERNEL_PROXY */ 1673 } 1674} 1675 1676static void 1677sighup_handler(int dummy __unused) 1678{ 1679 1680 sighup_received = true; 1681} 1682 1683static void 1684sigterm_handler(int dummy __unused) 1685{ 1686 1687 sigterm_received = true; 1688} 1689 1690static void 1691register_signals(void) 1692{ 1693 struct sigaction sa; 1694 int error; 1695 1696 bzero(&sa, sizeof(sa)); 1697 sa.sa_handler = sighup_handler; 1698 sigfillset(&sa.sa_mask); 1699 error = sigaction(SIGHUP, &sa, NULL); 1700 if (error != 0) 1701 log_err(1, "sigaction"); 1702 1703 sa.sa_handler = sigterm_handler; 1704 error = sigaction(SIGTERM, &sa, NULL); 1705 if (error != 0) 1706 log_err(1, "sigaction"); 1707 1708 sa.sa_handler = sigterm_handler; 1709 error = sigaction(SIGINT, &sa, NULL); 1710 if (error != 0) 1711 log_err(1, "sigaction"); 1712} 1713 1714int 1715main(int argc, char **argv) 1716{ 1717 struct conf *oldconf, *newconf, *tmpconf; 1718 const char *config_path = DEFAULT_CONFIG_PATH; 1719 int debug = 0, ch, error; 1720 bool dont_daemonize = false; 1721 1722 while ((ch = getopt(argc, argv, "df:")) != -1) { 1723 switch (ch) { 1724 case 'd': 1725 dont_daemonize = true; 1726 debug++; 1727 break; 1728 case 'f': 1729 config_path = optarg; 1730 break; 1731 case '?': 1732 default: 1733 usage(); 1734 } 1735 } 1736 argc -= optind; 1737 if (argc != 0) 1738 usage(); 1739 1740 log_init(debug); 1741 kernel_init(); 1742 1743 oldconf = conf_new_from_kernel(); 1744 newconf = conf_new_from_file(config_path); 1745 if (newconf == NULL) 1746 log_errx(1, "configuration error, exiting"); 1747 if (debug > 0) { 1748 oldconf->conf_debug = debug; 1749 newconf->conf_debug = debug; 1750 } 1751 1752#ifdef ICL_KERNEL_PROXY 1753 log_debugx("enabling CTL iSCSI port"); 1754 error = kernel_port_on(); 1755 if (error != 0) 1756 log_errx(1, "failed to enable CTL iSCSI port, exiting"); 1757#endif 1758 1759 error = conf_apply(oldconf, newconf); 1760 if (error != 0) 1761 log_errx(1, "failed to apply configuration, exiting"); 1762 conf_delete(oldconf); 1763 oldconf = NULL; 1764 1765 register_signals(); 1766 1767#ifndef ICL_KERNEL_PROXY 1768 log_debugx("enabling CTL iSCSI port"); 1769 error = kernel_port_on(); 1770 if (error != 0) 1771 log_errx(1, "failed to enable CTL iSCSI port, exiting"); 1772#endif 1773 1774 if (dont_daemonize == false) { 1775 log_debugx("daemonizing"); 1776 if (daemon(0, 0) == -1) { 1777 log_warn("cannot daemonize"); 1778 pidfile_remove(newconf->conf_pidfh); 1779 exit(1); 1780 } 1781 } 1782 1783 for (;;) { 1784 main_loop(newconf, dont_daemonize); 1785 if (sighup_received) { 1786 sighup_received = false; 1787 log_debugx("received SIGHUP, reloading configuration"); 1788 tmpconf = conf_new_from_file(config_path); 1789 if (tmpconf == NULL) { 1790 log_warnx("configuration error, " 1791 "continuing with old configuration"); 1792 } else { 1793 if (debug > 0) 1794 tmpconf->conf_debug = debug; 1795 oldconf = newconf; 1796 newconf = tmpconf; 1797 error = conf_apply(oldconf, newconf); 1798 if (error != 0) 1799 log_warnx("failed to reload " 1800 "configuration"); 1801 conf_delete(oldconf); 1802 oldconf = NULL; 1803 } 1804 } else if (sigterm_received) { 1805 log_debugx("exiting on signal; " 1806 "reloading empty configuration"); 1807 1808 log_debugx("disabling CTL iSCSI port " 1809 "and terminating all connections"); 1810 error = kernel_port_off(); 1811 if (error != 0) 1812 log_warnx("failed to disable CTL iSCSI port"); 1813 1814 oldconf = newconf; 1815 newconf = conf_new(); 1816 if (debug > 0) 1817 newconf->conf_debug = debug; 1818 error = conf_apply(oldconf, newconf); 1819 if (error != 0) 1820 log_warnx("failed to apply configuration"); 1821 1822 log_warnx("exiting on signal"); 1823 exit(0); 1824 } else { 1825 nchildren -= wait_for_children(false); 1826 assert(nchildren >= 0); 1827 } 1828 } 1829 /* NOTREACHED */ 1830} 1831