usr.sbin/ctld/ctld.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2012 The FreeBSD Foundation
   5  * All rights reserved.
   6  *
   7  * This software was developed by Edward Tomasz Napierala under sponsorship
   8  * from the FreeBSD Foundation.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <sys/types.h>
  37 #include <sys/time.h>
  38 #include <sys/socket.h>
  39 #include <sys/stat.h>
  40 #include <sys/wait.h>
  41 #include <netinet/in.h>
  42 #include <arpa/inet.h>
  43 #include <assert.h>
  44 #include <ctype.h>
  45 #include <errno.h>
  46 #include <netdb.h>
  47 #include <signal.h>
  48 #include <stdbool.h>
  49 #include <stdio.h>
  50 #include <stdint.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <unistd.h>
  54
  55 #include "ctld.h"
  56 #include "isns.h"
  57
  58 bool proxy_mode = false;
  59
  60 static volatile bool sighup_received = false;
  61 static volatile bool sigterm_received = false;
  62 static volatile bool sigalrm_received = false;
  63
  64 static int nchildren = 0;
  65 static uint16_t last_portal_group_tag = 0xff;
  66
  67 static void
  68 usage(void)
  69 {
  70
  71         fprintf(stderr, "usage: ctld [-d][-u][-f config-file]\n");
  72         fprintf(stderr, "       ctld -t [-u][-f config-file]\n");
  73         exit(1);
  74 }
  75
  76 char *
  77 checked_strdup(const char *s)
  78 {
  79         char *c;
  80
  81         c = strdup(s);
  82         if (c == NULL)
  83                 log_err(1, "strdup");
  84         return (c);
  85 }
  86
  87 struct conf *
  88 conf_new(void)
  89 {
  90         struct conf *conf;
  91
  92         conf = calloc(1, sizeof(*conf));
  93         if (conf == NULL)
  94                 log_err(1, "calloc");
  95         TAILQ_INIT(&conf->conf_luns);
  96         TAILQ_INIT(&conf->conf_targets);
  97         TAILQ_INIT(&conf->conf_auth_groups);
  98         TAILQ_INIT(&conf->conf_ports);
  99         TAILQ_INIT(&conf->conf_portal_groups);
 100         TAILQ_INIT(&conf->conf_pports);
 101         TAILQ_INIT(&conf->conf_isns);
 102
 103         conf->conf_isns_period = 900;
 104         conf->conf_isns_timeout = 5;
 105         conf->conf_debug = 0;
 106         conf->conf_timeout = 60;
 107         conf->conf_maxproc = 30;
 108
 109         return (conf);
 110 }
 111
 112 void
 113 conf_delete(struct conf *conf)
 114 {
 115         struct lun *lun, *ltmp;
 116         struct target *targ, *tmp;
 117         struct auth_group *ag, *cagtmp;
 118         struct portal_group *pg, *cpgtmp;
 119         struct pport *pp, *pptmp;
 120         struct isns *is, *istmp;
 121
 122         assert(conf->conf_pidfh == NULL);
 123
 124         TAILQ_FOREACH_SAFE(lun, &conf->conf_luns, l_next, ltmp)
 125                 lun_delete(lun);
 126         TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp)
 127                 target_delete(targ);
 128         TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp)
 129                 auth_group_delete(ag);
 130         TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp)
 131                 portal_group_delete(pg);
 132         TAILQ_FOREACH_SAFE(pp, &conf->conf_pports, pp_next, pptmp)
 133                 pport_delete(pp);
 134         TAILQ_FOREACH_SAFE(is, &conf->conf_isns, i_next, istmp)
 135                 isns_delete(is);
 136         assert(TAILQ_EMPTY(&conf->conf_ports));
 137         free(conf->conf_pidfile_path);
 138         free(conf);
 139 }
 140
 141 static struct auth *
 142 auth_new(struct auth_group *ag)
 143 {
 144         struct auth *auth;
 145
 146         auth = calloc(1, sizeof(*auth));
 147         if (auth == NULL)
 148                 log_err(1, "calloc");
 149         auth->a_auth_group = ag;
 150         TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next);
 151         return (auth);
 152 }
 153
 154 static void
 155 auth_delete(struct auth *auth)
 156 {
 157         TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next);
 158
 159         free(auth->a_user);
 160         free(auth->a_secret);
 161         free(auth->a_mutual_user);
 162         free(auth->a_mutual_secret);
 163         free(auth);
 164 }
 165
 166 const struct auth *
 167 auth_find(const struct auth_group *ag, const char *user)
 168 {
 169         const struct auth *auth;
 170
 171         TAILQ_FOREACH(auth, &ag->ag_auths, a_next) {
 172                 if (strcmp(auth->a_user, user) == 0)
 173                         return (auth);
 174         }
 175
 176         return (NULL);
 177 }
 178
 179 static void
 180 auth_check_secret_length(struct auth *auth)
 181 {
 182         size_t len;
 183
 184         len = strlen(auth->a_secret);
 185         if (len > 16) {
 186                 if (auth->a_auth_group->ag_name != NULL)
 187                         log_warnx("secret for user \"%s\", auth-group \"%s\", "
 188                             "is too long; it should be at most 16 characters "
 189                             "long", auth->a_user, auth->a_auth_group->ag_name);
 190                 else
 191                         log_warnx("secret for user \"%s\", target \"%s\", "
 192                             "is too long; it should be at most 16 characters "
 193                             "long", auth->a_user,
 194                             auth->a_auth_group->ag_target->t_name);
 195         }
 196         if (len < 12) {
 197                 if (auth->a_auth_group->ag_name != NULL)
 198                         log_warnx("secret for user \"%s\", auth-group \"%s\", "
 199                             "is too short; it should be at least 12 characters "
 200                             "long", auth->a_user,
 201                             auth->a_auth_group->ag_name);
 202                 else
 203                         log_warnx("secret for user \"%s\", target \"%s\", "
 204                             "is too short; it should be at least 12 characters "
 205                             "long", auth->a_user,
 206                             auth->a_auth_group->ag_target->t_name);
 207         }
 208
 209         if (auth->a_mutual_secret != NULL) {
 210                 len = strlen(auth->a_mutual_secret);
 211                 if (len > 16) {
 212                         if (auth->a_auth_group->ag_name != NULL)
 213                                 log_warnx("mutual secret for user \"%s\", "
 214                                     "auth-group \"%s\", is too long; it should "
 215                                     "be at most 16 characters long",
 216                                     auth->a_user, auth->a_auth_group->ag_name);
 217                         else
 218                                 log_warnx("mutual secret for user \"%s\", "
 219                                     "target \"%s\", is too long; it should "
 220                                     "be at most 16 characters long",
 221                                     auth->a_user,
 222                                     auth->a_auth_group->ag_target->t_name);
 223                 }
 224                 if (len < 12) {
 225                         if (auth->a_auth_group->ag_name != NULL)
 226                                 log_warnx("mutual secret for user \"%s\", "
 227                                     "auth-group \"%s\", is too short; it "
 228                                     "should be at least 12 characters long",
 229                                     auth->a_user, auth->a_auth_group->ag_name);
 230                         else
 231                                 log_warnx("mutual secret for user \"%s\", "
 232                                     "target \"%s\", is too short; it should be "
 233                                     "at least 12 characters long",
 234                                     auth->a_user,
 235                                     auth->a_auth_group->ag_target->t_name);
 236                 }
 237         }
 238 }
 239
 240 const struct auth *
 241 auth_new_chap(struct auth_group *ag, const char *user,
 242     const char *secret)
 243 {
 244         struct auth *auth;
 245
 246         if (ag->ag_type == AG_TYPE_UNKNOWN)
 247                 ag->ag_type = AG_TYPE_CHAP;
 248         if (ag->ag_type != AG_TYPE_CHAP) {
 249                 if (ag->ag_name != NULL)
 250                         log_warnx("cannot mix \"chap\" authentication with "
 251                             "other types for auth-group \"%s\"", ag->ag_name);
 252                 else
 253                         log_warnx("cannot mix \"chap\" authentication with "
 254                             "other types for target \"%s\"",
 255                             ag->ag_target->t_name);
 256                 return (NULL);
 257         }
 258
 259         auth = auth_new(ag);
 260         auth->a_user = checked_strdup(user);
 261         auth->a_secret = checked_strdup(secret);
 262
 263         auth_check_secret_length(auth);
 264
 265         return (auth);
 266 }
 267
 268 const struct auth *
 269 auth_new_chap_mutual(struct auth_group *ag, const char *user,
 270     const char *secret, const char *user2, const char *secret2)
 271 {
 272         struct auth *auth;
 273
 274         if (ag->ag_type == AG_TYPE_UNKNOWN)
 275                 ag->ag_type = AG_TYPE_CHAP_MUTUAL;
 276         if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) {
 277                 if (ag->ag_name != NULL)
 278                         log_warnx("cannot mix \"chap-mutual\" authentication "
 279                             "with other types for auth-group \"%s\"",
 280                             ag->ag_name);
 281                 else
 282                         log_warnx("cannot mix \"chap-mutual\" authentication "
 283                             "with other types for target \"%s\"",
 284                             ag->ag_target->t_name);
 285                 return (NULL);
 286         }
 287
 288         auth = auth_new(ag);
 289         auth->a_user = checked_strdup(user);
 290         auth->a_secret = checked_strdup(secret);
 291         auth->a_mutual_user = checked_strdup(user2);
 292         auth->a_mutual_secret = checked_strdup(secret2);
 293
 294         auth_check_secret_length(auth);
 295
 296         return (auth);
 297 }
 298
 299 const struct auth_name *
 300 auth_name_new(struct auth_group *ag, const char *name)
 301 {
 302         struct auth_name *an;
 303
 304         an = calloc(1, sizeof(*an));
 305         if (an == NULL)
 306                 log_err(1, "calloc");
 307         an->an_auth_group = ag;
 308         an->an_initator_name = checked_strdup(name);
 309         TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next);
 310         return (an);
 311 }
 312
 313 static void
 314 auth_name_delete(struct auth_name *an)
 315 {
 316         TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next);
 317
 318         free(an->an_initator_name);
 319         free(an);
 320 }
 321
 322 bool
 323 auth_name_defined(const struct auth_group *ag)
 324 {
 325         if (TAILQ_EMPTY(&ag->ag_names))
 326                 return (false);
 327         return (true);
 328 }
 329
 330 const struct auth_name *
 331 auth_name_find(const struct auth_group *ag, const char *name)
 332 {
 333         const struct auth_name *auth_name;
 334
 335         TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) {
 336                 if (strcmp(auth_name->an_initator_name, name) == 0)
 337                         return (auth_name);
 338         }
 339
 340         return (NULL);
 341 }
 342
 343 int
 344 auth_name_check(const struct auth_group *ag, const char *initiator_name)
 345 {
 346         if (!auth_name_defined(ag))
 347                 return (0);
 348
 349         if (auth_name_find(ag, initiator_name) == NULL)
 350                 return (1);
 351
 352         return (0);
 353 }
 354
 355 const struct auth_portal *
 356 auth_portal_new(struct auth_group *ag, const char *portal)
 357 {
 358         struct auth_portal *ap;
 359         char *net, *mask, *str, *tmp;
 360         int len, dm, m;
 361
 362         ap = calloc(1, sizeof(*ap));
 363         if (ap == NULL)
 364                 log_err(1, "calloc");
 365         ap->ap_auth_group = ag;
 366         ap->ap_initator_portal = checked_strdup(portal);
 367         mask = str = checked_strdup(portal);
 368         net = strsep(&mask, "/");
 369         if (net[0] == '[')
 370                 net++;
 371         len = strlen(net);
 372         if (len == 0)
 373                 goto error;
 374         if (net[len - 1] == ']')
 375                 net[len - 1] = 0;
 376         if (strchr(net, ':') != NULL) {
 377                 struct sockaddr_in6 *sin6 =
 378                     (struct sockaddr_in6 *)&ap->ap_sa;
 379
 380                 sin6->sin6_len = sizeof(*sin6);
 381                 sin6->sin6_family = AF_INET6;
 382                 if (inet_pton(AF_INET6, net, &sin6->sin6_addr) <= 0)
 383                         goto error;
 384                 dm = 128;
 385         } else {
 386                 struct sockaddr_in *sin =
 387                     (struct sockaddr_in *)&ap->ap_sa;
 388
 389                 sin->sin_len = sizeof(*sin);
 390                 sin->sin_family = AF_INET;
 391                 if (inet_pton(AF_INET, net, &sin->sin_addr) <= 0)
 392                         goto error;
 393                 dm = 32;
 394         }
 395         if (mask != NULL) {
 396                 m = strtol(mask, &tmp, 0);
 397                 if (m < 0 || m > dm || tmp[0] != 0)
 398                         goto error;
 399         } else
 400                 m = dm;
 401         ap->ap_mask = m;
 402         free(str);
 403         TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next);
 404         return (ap);
 405
 406 error:
 407         free(str);
 408         free(ap);
 409         log_warnx("incorrect initiator portal \"%s\"", portal);
 410         return (NULL);
 411 }
 412
 413 static void
 414 auth_portal_delete(struct auth_portal *ap)
 415 {
 416         TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next);
 417
 418         free(ap->ap_initator_portal);
 419         free(ap);
 420 }
 421
 422 bool
 423 auth_portal_defined(const struct auth_group *ag)
 424 {
 425         if (TAILQ_EMPTY(&ag->ag_portals))
 426                 return (false);
 427         return (true);
 428 }
 429
 430 const struct auth_portal *
 431 auth_portal_find(const struct auth_group *ag, const struct sockaddr_storage *ss)
 432 {
 433         const struct auth_portal *ap;
 434         const uint8_t *a, *b;
 435         int i;
 436         uint8_t bmask;
 437
 438         TAILQ_FOREACH(ap, &ag->ag_portals, ap_next) {
 439                 if (ap->ap_sa.ss_family != ss->ss_family)
 440                         continue;
 441                 if (ss->ss_family == AF_INET) {
 442                         a = (const uint8_t *)
 443                             &((const struct sockaddr_in *)ss)->sin_addr;
 444                         b = (const uint8_t *)
 445                             &((const struct sockaddr_in *)&ap->ap_sa)->sin_addr;
 446                 } else {
 447                         a = (const uint8_t *)
 448                             &((const struct sockaddr_in6 *)ss)->sin6_addr;
 449                         b = (const uint8_t *)
 450                             &((const struct sockaddr_in6 *)&ap->ap_sa)->sin6_addr;
 451                 }
 452                 for (i = 0; i < ap->ap_mask / 8; i++) {
 453                         if (a[i] != b[i])
 454                                 goto next;
 455                 }
 456                 if (ap->ap_mask % 8) {
 457                         bmask = 0xff << (8 - (ap->ap_mask % 8));
 458                         if ((a[i] & bmask) != (b[i] & bmask))
 459                                 goto next;
 460                 }
 461                 return (ap);
 462 next:
 463                 ;
 464         }
 465
 466         return (NULL);
 467 }
 468
 469 int
 470 auth_portal_check(const struct auth_group *ag, const struct sockaddr_storage *sa)
 471 {
 472
 473         if (!auth_portal_defined(ag))
 474                 return (0);
 475
 476         if (auth_portal_find(ag, sa) == NULL)
 477                 return (1);
 478
 479         return (0);
 480 }
 481
 482 struct auth_group *
 483 auth_group_new(struct conf *conf, const char *name)
 484 {
 485         struct auth_group *ag;
 486
 487         if (name != NULL) {
 488                 ag = auth_group_find(conf, name);
 489                 if (ag != NULL) {
 490                         log_warnx("duplicated auth-group \"%s\"", name);
 491                         return (NULL);
 492                 }
 493         }
 494
 495         ag = calloc(1, sizeof(*ag));
 496         if (ag == NULL)
 497                 log_err(1, "calloc");
 498         if (name != NULL)
 499                 ag->ag_name = checked_strdup(name);
 500         TAILQ_INIT(&ag->ag_auths);
 501         TAILQ_INIT(&ag->ag_names);
 502         TAILQ_INIT(&ag->ag_portals);
 503         ag->ag_conf = conf;
 504         TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next);
 505
 506         return (ag);
 507 }
 508
 509 void
 510 auth_group_delete(struct auth_group *ag)
 511 {
 512         struct auth *auth, *auth_tmp;
 513         struct auth_name *auth_name, *auth_name_tmp;
 514         struct auth_portal *auth_portal, *auth_portal_tmp;
 515
 516         TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next);
 517
 518         TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp)
 519                 auth_delete(auth);
 520         TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp)
 521                 auth_name_delete(auth_name);
 522         TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next,
 523             auth_portal_tmp)
 524                 auth_portal_delete(auth_portal);
 525         free(ag->ag_name);
 526         free(ag);
 527 }
 528
 529 struct auth_group *
 530 auth_group_find(const struct conf *conf, const char *name)
 531 {
 532         struct auth_group *ag;
 533
 534         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
 535                 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0)
 536                         return (ag);
 537         }
 538
 539         return (NULL);
 540 }
 541
 542 int
 543 auth_group_set_type(struct auth_group *ag, const char *str)
 544 {
 545         int type;
 546
 547         if (strcmp(str, "none") == 0) {
 548                 type = AG_TYPE_NO_AUTHENTICATION;
 549         } else if (strcmp(str, "deny") == 0) {
 550                 type = AG_TYPE_DENY;
 551         } else if (strcmp(str, "chap") == 0) {
 552                 type = AG_TYPE_CHAP;
 553         } else if (strcmp(str, "chap-mutual") == 0) {
 554                 type = AG_TYPE_CHAP_MUTUAL;
 555         } else {
 556                 if (ag->ag_name != NULL)
 557                         log_warnx("invalid auth-type \"%s\" for auth-group "
 558                             "\"%s\"", str, ag->ag_name);
 559                 else
 560                         log_warnx("invalid auth-type \"%s\" for target "
 561                             "\"%s\"", str, ag->ag_target->t_name);
 562                 return (1);
 563         }
 564
 565         if (ag->ag_type != AG_TYPE_UNKNOWN && ag->ag_type != type) {
 566                 if (ag->ag_name != NULL) {
 567                         log_warnx("cannot set auth-type to \"%s\" for "
 568                             "auth-group \"%s\"; already has a different "
 569                             "type", str, ag->ag_name);
 570                 } else {
 571                         log_warnx("cannot set auth-type to \"%s\" for target "
 572                             "\"%s\"; already has a different type",
 573                             str, ag->ag_target->t_name);
 574                 }
 575                 return (1);
 576         }
 577
 578         ag->ag_type = type;
 579
 580         return (0);
 581 }
 582
 583 static struct portal *
 584 portal_new(struct portal_group *pg)
 585 {
 586         struct portal *portal;
 587
 588         portal = calloc(1, sizeof(*portal));
 589         if (portal == NULL)
 590                 log_err(1, "calloc");
 591         TAILQ_INIT(&portal->p_targets);
 592         portal->p_portal_group = pg;
 593         TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next);
 594         return (portal);
 595 }
 596
 597 static void
 598 portal_delete(struct portal *portal)
 599 {
 600
 601         TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next);
 602         if (portal->p_ai != NULL)
 603                 freeaddrinfo(portal->p_ai);
 604         free(portal->p_listen);
 605         free(portal);
 606 }
 607
 608 struct portal_group *
 609 portal_group_new(struct conf *conf, const char *name)
 610 {
 611         struct portal_group *pg;
 612
 613         pg = portal_group_find(conf, name);
 614         if (pg != NULL) {
 615                 log_warnx("duplicated portal-group \"%s\"", name);
 616                 return (NULL);
 617         }
 618
 619         pg = calloc(1, sizeof(*pg));
 620         if (pg == NULL)
 621                 log_err(1, "calloc");
 622         pg->pg_name = checked_strdup(name);
 623         TAILQ_INIT(&pg->pg_options);
 624         TAILQ_INIT(&pg->pg_portals);
 625         TAILQ_INIT(&pg->pg_ports);
 626         pg->pg_conf = conf;
 627         pg->pg_tag = 0;         /* Assigned later in conf_apply(). */
 628         TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next);
 629
 630         return (pg);
 631 }
 632
 633 void
 634 portal_group_delete(struct portal_group *pg)
 635 {
 636         struct portal *portal, *tmp;
 637         struct port *port, *tport;
 638         struct option *o, *otmp;
 639
 640         TAILQ_FOREACH_SAFE(port, &pg->pg_ports, p_pgs, tport)
 641                 port_delete(port);
 642         TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next);
 643
 644         TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp)
 645                 portal_delete(portal);
 646         TAILQ_FOREACH_SAFE(o, &pg->pg_options, o_next, otmp)
 647                 option_delete(&pg->pg_options, o);
 648         free(pg->pg_name);
 649         free(pg->pg_offload);
 650         free(pg->pg_redirection);
 651         free(pg);
 652 }
 653
 654 struct portal_group *
 655 portal_group_find(const struct conf *conf, const char *name)
 656 {
 657         struct portal_group *pg;
 658
 659         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
 660                 if (strcmp(pg->pg_name, name) == 0)
 661                         return (pg);
 662         }
 663
 664         return (NULL);
 665 }
 666
 667 static int
 668 parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai)
 669 {
 670         struct addrinfo hints;
 671         char *str, *addr, *ch;
 672         const char *port;
 673         int error, colons = 0;
 674
 675         str = arg = strdup(arg);
 676         if (arg[0] == '[') {
 677                 /*
 678                  * IPv6 address in square brackets, perhaps with port.
 679                  */
 680                 arg++;
 681                 addr = strsep(&arg, "]");
 682                 if (arg == NULL) {
 683                         free(str);
 684                         return (1);
 685                 }
 686                 if (arg[0] == '\0') {
 687                         port = def_port;
 688                 } else if (arg[0] == ':') {
 689                         port = arg + 1;
 690                 } else {
 691                         free(str);
 692                         return (1);
 693                 }
 694         } else {
 695                 /*
 696                  * Either IPv6 address without brackets - and without
 697                  * a port - or IPv4 address.  Just count the colons.
 698                  */
 699                 for (ch = arg; *ch != '\0'; ch++) {
 700                         if (*ch == ':')
 701                                 colons++;
 702                 }
 703                 if (colons > 1) {
 704                         addr = arg;
 705                         port = def_port;
 706                 } else {
 707                         addr = strsep(&arg, ":");
 708                         if (arg == NULL)
 709                                 port = def_port;
 710                         else
 711                                 port = arg;
 712                 }
 713         }
 714
 715         memset(&hints, 0, sizeof(hints));
 716         hints.ai_family = PF_UNSPEC;
 717         hints.ai_socktype = SOCK_STREAM;
 718         hints.ai_flags = AI_PASSIVE;
 719         error = getaddrinfo(addr, port, &hints, ai);
 720         free(str);
 721         return ((error != 0) ? 1 : 0);
 722 }
 723
 724 int
 725 portal_group_add_listen(struct portal_group *pg, const char *value, bool iser)
 726 {
 727         struct portal *portal;
 728
 729         portal = portal_new(pg);
 730         portal->p_listen = checked_strdup(value);
 731         portal->p_iser = iser;
 732
 733         if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) {
 734                 log_warnx("invalid listen address %s", portal->p_listen);
 735                 portal_delete(portal);
 736                 return (1);
 737         }
 738
 739         /*
 740          * XXX: getaddrinfo(3) may return multiple addresses; we should turn
 741          *      those into multiple portals.
 742          */
 743
 744         return (0);
 745 }
 746
 747 int
 748 isns_new(struct conf *conf, const char *addr)
 749 {
 750         struct isns *isns;
 751
 752         isns = calloc(1, sizeof(*isns));
 753         if (isns == NULL)
 754                 log_err(1, "calloc");
 755         isns->i_conf = conf;
 756         TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next);
 757         isns->i_addr = checked_strdup(addr);
 758
 759         if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) {
 760                 log_warnx("invalid iSNS address %s", isns->i_addr);
 761                 isns_delete(isns);
 762                 return (1);
 763         }
 764
 765         /*
 766          * XXX: getaddrinfo(3) may return multiple addresses; we should turn
 767          *      those into multiple servers.
 768          */
 769
 770         return (0);
 771 }
 772
 773 void
 774 isns_delete(struct isns *isns)
 775 {
 776
 777         TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next);
 778         free(isns->i_addr);
 779         if (isns->i_ai != NULL)
 780                 freeaddrinfo(isns->i_ai);
 781         free(isns);
 782 }
 783
 784 static int
 785 isns_do_connect(struct isns *isns)
 786 {
 787         int s;
 788
 789         s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype,
 790             isns->i_ai->ai_protocol);
 791         if (s < 0) {
 792                 log_warn("socket(2) failed for %s", isns->i_addr);
 793                 return (-1);
 794         }
 795         if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) {
 796                 log_warn("connect(2) failed for %s", isns->i_addr);
 797                 close(s);
 798                 return (-1);
 799         }
 800         return(s);
 801 }
 802
 803 static int
 804 isns_do_register(struct isns *isns, int s, const char *hostname)
 805 {
 806         struct conf *conf = isns->i_conf;
 807         struct target *target;
 808         struct portal *portal;
 809         struct portal_group *pg;
 810         struct port *port;
 811         struct isns_req *req;
 812         int res = 0;
 813         uint32_t error;
 814
 815         req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT);
 816         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 817         isns_req_add_delim(req);
 818         isns_req_add_str(req, 1, hostname);
 819         isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */
 820         isns_req_add_32(req, 6, conf->conf_isns_period);
 821         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
 822                 if (pg->pg_unassigned)
 823                         continue;
 824                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
 825                         isns_req_add_addr(req, 16, portal->p_ai);
 826                         isns_req_add_port(req, 17, portal->p_ai);
 827                 }
 828         }
 829         TAILQ_FOREACH(target, &conf->conf_targets, t_next) {
 830                 isns_req_add_str(req, 32, target->t_name);
 831                 isns_req_add_32(req, 33, 1); /* 1 -- Target*/
 832                 if (target->t_alias != NULL)
 833                         isns_req_add_str(req, 34, target->t_alias);
 834                 TAILQ_FOREACH(port, &target->t_ports, p_ts) {
 835                         if ((pg = port->p_portal_group) == NULL)
 836                                 continue;
 837                         isns_req_add_32(req, 51, pg->pg_tag);
 838                         TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
 839                                 isns_req_add_addr(req, 49, portal->p_ai);
 840                                 isns_req_add_port(req, 50, portal->p_ai);
 841                         }
 842                 }
 843         }
 844         res = isns_req_send(s, req);
 845         if (res < 0) {
 846                 log_warn("send(2) failed for %s", isns->i_addr);
 847                 goto quit;
 848         }
 849         res = isns_req_receive(s, req);
 850         if (res < 0) {
 851                 log_warn("receive(2) failed for %s", isns->i_addr);
 852                 goto quit;
 853         }
 854         error = isns_req_get_status(req);
 855         if (error != 0) {
 856                 log_warnx("iSNS register error %d for %s", error, isns->i_addr);
 857                 res = -1;
 858         }
 859 quit:
 860         isns_req_free(req);
 861         return (res);
 862 }
 863
 864 static int
 865 isns_do_check(struct isns *isns, int s, const char *hostname)
 866 {
 867         struct conf *conf = isns->i_conf;
 868         struct isns_req *req;
 869         int res = 0;
 870         uint32_t error;
 871
 872         req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT);
 873         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 874         isns_req_add_str(req, 1, hostname);
 875         isns_req_add_delim(req);
 876         isns_req_add(req, 2, 0, NULL);
 877         res = isns_req_send(s, req);
 878         if (res < 0) {
 879                 log_warn("send(2) failed for %s", isns->i_addr);
 880                 goto quit;
 881         }
 882         res = isns_req_receive(s, req);
 883         if (res < 0) {
 884                 log_warn("receive(2) failed for %s", isns->i_addr);
 885                 goto quit;
 886         }
 887         error = isns_req_get_status(req);
 888         if (error != 0) {
 889                 log_warnx("iSNS check error %d for %s", error, isns->i_addr);
 890                 res = -1;
 891         }
 892 quit:
 893         isns_req_free(req);
 894         return (res);
 895 }
 896
 897 static int
 898 isns_do_deregister(struct isns *isns, int s, const char *hostname)
 899 {
 900         struct conf *conf = isns->i_conf;
 901         struct isns_req *req;
 902         int res = 0;
 903         uint32_t error;
 904
 905         req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT);
 906         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 907         isns_req_add_delim(req);
 908         isns_req_add_str(req, 1, hostname);
 909         res = isns_req_send(s, req);
 910         if (res < 0) {
 911                 log_warn("send(2) failed for %s", isns->i_addr);
 912                 goto quit;
 913         }
 914         res = isns_req_receive(s, req);
 915         if (res < 0) {
 916                 log_warn("receive(2) failed for %s", isns->i_addr);
 917                 goto quit;
 918         }
 919         error = isns_req_get_status(req);
 920         if (error != 0) {
 921                 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr);
 922                 res = -1;
 923         }
 924 quit:
 925         isns_req_free(req);
 926         return (res);
 927 }
 928
 929 void
 930 isns_register(struct isns *isns, struct isns *oldisns)
 931 {
 932         struct conf *conf = isns->i_conf;
 933         int s;
 934         char hostname[256];
 935
 936         if (TAILQ_EMPTY(&conf->conf_targets) ||
 937             TAILQ_EMPTY(&conf->conf_portal_groups))
 938                 return;
 939         set_timeout(conf->conf_isns_timeout, false);
 940         s = isns_do_connect(isns);
 941         if (s < 0) {
 942                 set_timeout(0, false);
 943                 return;
 944         }
 945         gethostname(hostname, sizeof(hostname));
 946
 947         if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets))
 948                 oldisns = isns;
 949         isns_do_deregister(oldisns, s, hostname);
 950         isns_do_register(isns, s, hostname);
 951         close(s);
 952         set_timeout(0, false);
 953 }
 954
 955 void
 956 isns_check(struct isns *isns)
 957 {
 958         struct conf *conf = isns->i_conf;
 959         int s, res;
 960         char hostname[256];
 961
 962         if (TAILQ_EMPTY(&conf->conf_targets) ||
 963             TAILQ_EMPTY(&conf->conf_portal_groups))
 964                 return;
 965         set_timeout(conf->conf_isns_timeout, false);
 966         s = isns_do_connect(isns);
 967         if (s < 0) {
 968                 set_timeout(0, false);
 969                 return;
 970         }
 971         gethostname(hostname, sizeof(hostname));
 972
 973         res = isns_do_check(isns, s, hostname);
 974         if (res < 0) {
 975                 isns_do_deregister(isns, s, hostname);
 976                 isns_do_register(isns, s, hostname);
 977         }
 978         close(s);
 979         set_timeout(0, false);
 980 }
 981
 982 void
 983 isns_deregister(struct isns *isns)
 984 {
 985         struct conf *conf = isns->i_conf;
 986         int s;
 987         char hostname[256];
 988
 989         if (TAILQ_EMPTY(&conf->conf_targets) ||
 990             TAILQ_EMPTY(&conf->conf_portal_groups))
 991                 return;
 992         set_timeout(conf->conf_isns_timeout, false);
 993         s = isns_do_connect(isns);
 994         if (s < 0)
 995                 return;
 996         gethostname(hostname, sizeof(hostname));
 997
 998         isns_do_deregister(isns, s, hostname);
 999         close(s);
1000         set_timeout(0, false);
1001 }
1002
1003 int
1004 portal_group_set_filter(struct portal_group *pg, const char *str)
1005 {
1006         int filter;
1007
1008         if (strcmp(str, "none") == 0) {
1009                 filter = PG_FILTER_NONE;
1010         } else if (strcmp(str, "portal") == 0) {
1011                 filter = PG_FILTER_PORTAL;
1012         } else if (strcmp(str, "portal-name") == 0) {
1013                 filter = PG_FILTER_PORTAL_NAME;
1014         } else if (strcmp(str, "portal-name-auth") == 0) {
1015                 filter = PG_FILTER_PORTAL_NAME_AUTH;
1016         } else {
1017                 log_warnx("invalid discovery-filter \"%s\" for portal-group "
1018                     "\"%s\"; valid values are \"none\", \"portal\", "
1019                     "\"portal-name\", and \"portal-name-auth\"",
1020                     str, pg->pg_name);
1021                 return (1);
1022         }
1023
1024         if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN &&
1025             pg->pg_discovery_filter != filter) {
1026                 log_warnx("cannot set discovery-filter to \"%s\" for "
1027                     "portal-group \"%s\"; already has a different "
1028                     "value", str, pg->pg_name);
1029                 return (1);
1030         }
1031
1032         pg->pg_discovery_filter = filter;
1033
1034         return (0);
1035 }
1036
1037 int
1038 portal_group_set_offload(struct portal_group *pg, const char *offload)
1039 {
1040
1041         if (pg->pg_offload != NULL) {
1042                 log_warnx("cannot set offload to \"%s\" for "
1043                     "portal-group \"%s\"; already defined",
1044                     offload, pg->pg_name);
1045                 return (1);
1046         }
1047
1048         pg->pg_offload = checked_strdup(offload);
1049
1050         return (0);
1051 }
1052
1053 int
1054 portal_group_set_redirection(struct portal_group *pg, const char *addr)
1055 {
1056
1057         if (pg->pg_redirection != NULL) {
1058                 log_warnx("cannot set redirection to \"%s\" for "
1059                     "portal-group \"%s\"; already defined",
1060                     addr, pg->pg_name);
1061                 return (1);
1062         }
1063
1064         pg->pg_redirection = checked_strdup(addr);
1065
1066         return (0);
1067 }
1068
1069 static bool
1070 valid_hex(const char ch)
1071 {
1072         switch (ch) {
1073         case '0':
1074         case '1':
1075         case '2':
1076         case '3':
1077         case '4':
1078         case '5':
1079         case '6':
1080         case '7':
1081         case '8':
1082         case '9':
1083         case 'a':
1084         case 'A':
1085         case 'b':
1086         case 'B':
1087         case 'c':
1088         case 'C':
1089         case 'd':
1090         case 'D':
1091         case 'e':
1092         case 'E':
1093         case 'f':
1094         case 'F':
1095                 return (true);
1096         default:
1097                 return (false);
1098         }
1099 }
1100
1101 bool
1102 valid_iscsi_name(const char *name)
1103 {
1104         int i;
1105
1106         if (strlen(name) >= MAX_NAME_LEN) {
1107                 log_warnx("overlong name for target \"%s\"; max length allowed "
1108                     "by iSCSI specification is %d characters",
1109                     name, MAX_NAME_LEN);
1110                 return (false);
1111         }
1112
1113         /*
1114          * In the cases below, we don't return an error, just in case the admin
1115          * was right, and we're wrong.
1116          */
1117         if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) {
1118                 for (i = strlen("iqn."); name[i] != '\0'; i++) {
1119                         /*
1120                          * XXX: We should verify UTF-8 normalisation, as defined
1121                          *      by 3.2.6.2: iSCSI Name Encoding.
1122                          */
1123                         if (isalnum(name[i]))
1124                                 continue;
1125                         if (name[i] == '-' || name[i] == '.' || name[i] == ':')
1126                                 continue;
1127                         log_warnx("invalid character \"%c\" in target name "
1128                             "\"%s\"; allowed characters are letters, digits, "
1129                             "'-', '.', and ':'", name[i], name);
1130                         break;
1131                 }
1132                 /*
1133                  * XXX: Check more stuff: valid date and a valid reversed domain.
1134                  */
1135         } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) {
1136                 if (strlen(name) != strlen("eui.") + 16)
1137                         log_warnx("invalid target name \"%s\"; the \"eui.\" "
1138                             "should be followed by exactly 16 hexadecimal "
1139                             "digits", name);
1140                 for (i = strlen("eui."); name[i] != '\0'; i++) {
1141                         if (!valid_hex(name[i])) {
1142                                 log_warnx("invalid character \"%c\" in target "
1143                                     "name \"%s\"; allowed characters are 1-9 "
1144                                     "and A-F", name[i], name);
1145                                 break;
1146                         }
1147                 }
1148         } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) {
1149                 if (strlen(name) > strlen("naa.") + 32)
1150                         log_warnx("invalid target name \"%s\"; the \"naa.\" "
1151                             "should be followed by at most 32 hexadecimal "
1152                             "digits", name);
1153                 for (i = strlen("naa."); name[i] != '\0'; i++) {
1154                         if (!valid_hex(name[i])) {
1155                                 log_warnx("invalid character \"%c\" in target "
1156                                     "name \"%s\"; allowed characters are 1-9 "
1157                                     "and A-F", name[i], name);
1158                                 break;
1159                         }
1160                 }
1161         } else {
1162                 log_warnx("invalid target name \"%s\"; should start with "
1163                     "either \"iqn.\", \"eui.\", or \"naa.\"",
1164                     name);
1165         }
1166         return (true);
1167 }
1168
1169 struct pport *
1170 pport_new(struct conf *conf, const char *name, uint32_t ctl_port)
1171 {
1172         struct pport *pp;
1173
1174         pp = calloc(1, sizeof(*pp));
1175         if (pp == NULL)
1176                 log_err(1, "calloc");
1177         pp->pp_conf = conf;
1178         pp->pp_name = checked_strdup(name);
1179         pp->pp_ctl_port = ctl_port;
1180         TAILQ_INIT(&pp->pp_ports);
1181         TAILQ_INSERT_TAIL(&conf->conf_pports, pp, pp_next);
1182         return (pp);
1183 }
1184
1185 struct pport *
1186 pport_find(const struct conf *conf, const char *name)
1187 {
1188         struct pport *pp;
1189
1190         TAILQ_FOREACH(pp, &conf->conf_pports, pp_next) {
1191                 if (strcasecmp(pp->pp_name, name) == 0)
1192                         return (pp);
1193         }
1194         return (NULL);
1195 }
1196
1197 struct pport *
1198 pport_copy(struct pport *pp, struct conf *conf)
1199 {
1200         struct pport *ppnew;
1201
1202         ppnew = pport_new(conf, pp->pp_name, pp->pp_ctl_port);
1203         return (ppnew);
1204 }
1205
1206 void
1207 pport_delete(struct pport *pp)
1208 {
1209         struct port *port, *tport;
1210
1211         TAILQ_FOREACH_SAFE(port, &pp->pp_ports, p_ts, tport)
1212                 port_delete(port);
1213         TAILQ_REMOVE(&pp->pp_conf->conf_pports, pp, pp_next);
1214         free(pp->pp_name);
1215         free(pp);
1216 }
1217
1218 struct port *
1219 port_new(struct conf *conf, struct target *target, struct portal_group *pg)
1220 {
1221         struct port *port;
1222         char *name;
1223         int ret;
1224
1225         ret = asprintf(&name, "%s-%s", pg->pg_name, target->t_name);
1226         if (ret <= 0)
1227                 log_err(1, "asprintf");
1228         if (port_find(conf, name) != NULL) {
1229                 log_warnx("duplicate port \"%s\"", name);
1230                 free(name);
1231                 return (NULL);
1232         }
1233         port = calloc(1, sizeof(*port));
1234         if (port == NULL)
1235                 log_err(1, "calloc");
1236         port->p_conf = conf;
1237         port->p_name = name;
1238         port->p_ioctl_port = 0;
1239         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1240         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1241         port->p_target = target;
1242         TAILQ_INSERT_TAIL(&pg->pg_ports, port, p_pgs);
1243         port->p_portal_group = pg;
1244         return (port);
1245 }
1246
1247 struct port *
1248 port_new_ioctl(struct conf *conf, struct target *target, int pp, int vp)
1249 {
1250         struct pport *pport;
1251         struct port *port;
1252         char *pname;
1253         char *name;
1254         int ret;
1255
1256         ret = asprintf(&pname, "ioctl/%d/%d", pp, vp);
1257         if (ret <= 0) {
1258                 log_err(1, "asprintf");
1259                 return (NULL);
1260         }
1261
1262         pport = pport_find(conf, pname);
1263         if (pport != NULL) {
1264                 free(pname);
1265                 return (port_new_pp(conf, target, pport));
1266         }
1267
1268         ret = asprintf(&name, "%s-%s", pname, target->t_name);
1269         free(pname);
1270
1271         if (ret <= 0)
1272                 log_err(1, "asprintf");
1273         if (port_find(conf, name) != NULL) {
1274                 log_warnx("duplicate port \"%s\"", name);
1275                 free(name);
1276                 return (NULL);
1277         }
1278         port = calloc(1, sizeof(*port));
1279         if (port == NULL)
1280                 log_err(1, "calloc");
1281         port->p_conf = conf;
1282         port->p_name = name;
1283         port->p_ioctl_port = 1;
1284         port->p_ioctl_pp = pp;
1285         port->p_ioctl_vp = vp;
1286         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1287         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1288         port->p_target = target;
1289         return (port);
1290 }
1291
1292 struct port *
1293 port_new_pp(struct conf *conf, struct target *target, struct pport *pp)
1294 {
1295         struct port *port;
1296         char *name;
1297         int ret;
1298
1299         ret = asprintf(&name, "%s-%s", pp->pp_name, target->t_name);
1300         if (ret <= 0)
1301                 log_err(1, "asprintf");
1302         if (port_find(conf, name) != NULL) {
1303                 log_warnx("duplicate port \"%s\"", name);
1304                 free(name);
1305                 return (NULL);
1306         }
1307         port = calloc(1, sizeof(*port));
1308         if (port == NULL)
1309                 log_err(1, "calloc");
1310         port->p_conf = conf;
1311         port->p_name = name;
1312         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1313         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1314         port->p_target = target;
1315         TAILQ_INSERT_TAIL(&pp->pp_ports, port, p_pps);
1316         port->p_pport = pp;
1317         return (port);
1318 }
1319
1320 struct port *
1321 port_find(const struct conf *conf, const char *name)
1322 {
1323         struct port *port;
1324
1325         TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1326                 if (strcasecmp(port->p_name, name) == 0)
1327                         return (port);
1328         }
1329
1330         return (NULL);
1331 }
1332
1333 struct port *
1334 port_find_in_pg(const struct portal_group *pg, const char *target)
1335 {
1336         struct port *port;
1337
1338         TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) {
1339                 if (strcasecmp(port->p_target->t_name, target) == 0)
1340                         return (port);
1341         }
1342
1343         return (NULL);
1344 }
1345
1346 void
1347 port_delete(struct port *port)
1348 {
1349
1350         if (port->p_portal_group)
1351                 TAILQ_REMOVE(&port->p_portal_group->pg_ports, port, p_pgs);
1352         if (port->p_pport)
1353                 TAILQ_REMOVE(&port->p_pport->pp_ports, port, p_pps);
1354         if (port->p_target)
1355                 TAILQ_REMOVE(&port->p_target->t_ports, port, p_ts);
1356         TAILQ_REMOVE(&port->p_conf->conf_ports, port, p_next);
1357         free(port->p_name);
1358         free(port);
1359 }
1360
1361 int
1362 port_is_dummy(struct port *port)
1363 {
1364
1365         if (port->p_portal_group) {
1366                 if (port->p_portal_group->pg_foreign)
1367                         return (1);
1368                 if (TAILQ_EMPTY(&port->p_portal_group->pg_portals))
1369                         return (1);
1370         }
1371         return (0);
1372 }
1373
1374 struct target *
1375 target_new(struct conf *conf, const char *name)
1376 {
1377         struct target *targ;
1378         int i, len;
1379
1380         targ = target_find(conf, name);
1381         if (targ != NULL) {
1382                 log_warnx("duplicated target \"%s\"", name);
1383                 return (NULL);
1384         }
1385         if (valid_iscsi_name(name) == false) {
1386                 log_warnx("target name \"%s\" is invalid", name);
1387                 return (NULL);
1388         }
1389         targ = calloc(1, sizeof(*targ));
1390         if (targ == NULL)
1391                 log_err(1, "calloc");
1392         targ->t_name = checked_strdup(name);
1393
1394         /*
1395          * RFC 3722 requires us to normalize the name to lowercase.
1396          */
1397         len = strlen(name);
1398         for (i = 0; i < len; i++)
1399                 targ->t_name[i] = tolower(targ->t_name[i]);
1400
1401         targ->t_conf = conf;
1402         TAILQ_INIT(&targ->t_ports);
1403         TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next);
1404
1405         return (targ);
1406 }
1407
1408 void
1409 target_delete(struct target *targ)
1410 {
1411         struct port *port, *tport;
1412
1413         TAILQ_FOREACH_SAFE(port, &targ->t_ports, p_ts, tport)
1414                 port_delete(port);
1415         TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next);
1416
1417         free(targ->t_name);
1418         free(targ->t_redirection);
1419         free(targ);
1420 }
1421
1422 struct target *
1423 target_find(struct conf *conf, const char *name)
1424 {
1425         struct target *targ;
1426
1427         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1428                 if (strcasecmp(targ->t_name, name) == 0)
1429                         return (targ);
1430         }
1431
1432         return (NULL);
1433 }
1434
1435 int
1436 target_set_redirection(struct target *target, const char *addr)
1437 {
1438
1439         if (target->t_redirection != NULL) {
1440                 log_warnx("cannot set redirection to \"%s\" for "
1441                     "target \"%s\"; already defined",
1442                     addr, target->t_name);
1443                 return (1);
1444         }
1445
1446         target->t_redirection = checked_strdup(addr);
1447
1448         return (0);
1449 }
1450
1451 struct lun *
1452 lun_new(struct conf *conf, const char *name)
1453 {
1454         struct lun *lun;
1455
1456         lun = lun_find(conf, name);
1457         if (lun != NULL) {
1458                 log_warnx("duplicated lun \"%s\"", name);
1459                 return (NULL);
1460         }
1461
1462         lun = calloc(1, sizeof(*lun));
1463         if (lun == NULL)
1464                 log_err(1, "calloc");
1465         lun->l_conf = conf;
1466         lun->l_name = checked_strdup(name);
1467         TAILQ_INIT(&lun->l_options);
1468         TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next);
1469         lun->l_ctl_lun = -1;
1470
1471         return (lun);
1472 }
1473
1474 void
1475 lun_delete(struct lun *lun)
1476 {
1477         struct target *targ;
1478         struct option *o, *tmp;
1479         int i;
1480
1481         TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) {
1482                 for (i = 0; i < MAX_LUNS; i++) {
1483                         if (targ->t_luns[i] == lun)
1484                                 targ->t_luns[i] = NULL;
1485                 }
1486         }
1487         TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next);
1488
1489         TAILQ_FOREACH_SAFE(o, &lun->l_options, o_next, tmp)
1490                 option_delete(&lun->l_options, o);
1491         free(lun->l_name);
1492         free(lun->l_backend);
1493         free(lun->l_device_id);
1494         free(lun->l_path);
1495         free(lun->l_scsiname);
1496         free(lun->l_serial);
1497         free(lun);
1498 }
1499
1500 struct lun *
1501 lun_find(const struct conf *conf, const char *name)
1502 {
1503         struct lun *lun;
1504
1505         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1506                 if (strcmp(lun->l_name, name) == 0)
1507                         return (lun);
1508         }
1509
1510         return (NULL);
1511 }
1512
1513 void
1514 lun_set_backend(struct lun *lun, const char *value)
1515 {
1516         free(lun->l_backend);
1517         lun->l_backend = checked_strdup(value);
1518 }
1519
1520 void
1521 lun_set_blocksize(struct lun *lun, size_t value)
1522 {
1523
1524         lun->l_blocksize = value;
1525 }
1526
1527 void
1528 lun_set_device_type(struct lun *lun, uint8_t value)
1529 {
1530
1531         lun->l_device_type = value;
1532 }
1533
1534 void
1535 lun_set_device_id(struct lun *lun, const char *value)
1536 {
1537         free(lun->l_device_id);
1538         lun->l_device_id = checked_strdup(value);
1539 }
1540
1541 void
1542 lun_set_path(struct lun *lun, const char *value)
1543 {
1544         free(lun->l_path);
1545         lun->l_path = checked_strdup(value);
1546 }
1547
1548 void
1549 lun_set_scsiname(struct lun *lun, const char *value)
1550 {
1551         free(lun->l_scsiname);
1552         lun->l_scsiname = checked_strdup(value);
1553 }
1554
1555 void
1556 lun_set_serial(struct lun *lun, const char *value)
1557 {
1558         free(lun->l_serial);
1559         lun->l_serial = checked_strdup(value);
1560 }
1561
1562 void
1563 lun_set_size(struct lun *lun, size_t value)
1564 {
1565
1566         lun->l_size = value;
1567 }
1568
1569 void
1570 lun_set_ctl_lun(struct lun *lun, uint32_t value)
1571 {
1572
1573         lun->l_ctl_lun = value;
1574 }
1575
1576 struct option *
1577 option_new(struct options *options, const char *name, const char *value)
1578 {
1579         struct option *o;
1580
1581         o = option_find(options, name);
1582         if (o != NULL) {
1583                 log_warnx("duplicated option \"%s\"", name);
1584                 return (NULL);
1585         }
1586
1587         o = calloc(1, sizeof(*o));
1588         if (o == NULL)
1589                 log_err(1, "calloc");
1590         o->o_name = checked_strdup(name);
1591         o->o_value = checked_strdup(value);
1592         TAILQ_INSERT_TAIL(options, o, o_next);
1593
1594         return (o);
1595 }
1596
1597 void
1598 option_delete(struct options *options, struct option *o)
1599 {
1600
1601         TAILQ_REMOVE(options, o, o_next);
1602         free(o->o_name);
1603         free(o->o_value);
1604         free(o);
1605 }
1606
1607 struct option *
1608 option_find(const struct options *options, const char *name)
1609 {
1610         struct option *o;
1611
1612         TAILQ_FOREACH(o, options, o_next) {
1613                 if (strcmp(o->o_name, name) == 0)
1614                         return (o);
1615         }
1616
1617         return (NULL);
1618 }
1619
1620 void
1621 option_set(struct option *o, const char *value)
1622 {
1623
1624         free(o->o_value);
1625         o->o_value = checked_strdup(value);
1626 }
1627
1628 static struct connection *
1629 connection_new(struct portal *portal, int fd, const char *host,
1630     const struct sockaddr *client_sa)
1631 {
1632         struct connection *conn;
1633
1634         conn = calloc(1, sizeof(*conn));
1635         if (conn == NULL)
1636                 log_err(1, "calloc");
1637         conn->conn_portal = portal;
1638         conn->conn_socket = fd;
1639         conn->conn_initiator_addr = checked_strdup(host);
1640         memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len);
1641
1642         /*
1643          * Default values, from RFC 3720, section 12.
1644          */
1645         conn->conn_max_recv_data_segment_length = 8192;
1646         conn->conn_max_send_data_segment_length = 8192;
1647         conn->conn_max_burst_length = 262144;
1648         conn->conn_first_burst_length = 65536;
1649         conn->conn_immediate_data = true;
1650
1651         return (conn);
1652 }
1653
1654 #if 0
1655 static void
1656 conf_print(struct conf *conf)
1657 {
1658         struct auth_group *ag;
1659         struct auth *auth;
1660         struct auth_name *auth_name;
1661         struct auth_portal *auth_portal;
1662         struct portal_group *pg;
1663         struct portal *portal;
1664         struct target *targ;
1665         struct lun *lun;
1666         struct option *o;
1667
1668         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1669                 fprintf(stderr, "auth-group %s {\n", ag->ag_name);
1670                 TAILQ_FOREACH(auth, &ag->ag_auths, a_next)
1671                         fprintf(stderr, "\t chap-mutual %s %s %s %s\n",
1672                             auth->a_user, auth->a_secret,
1673                             auth->a_mutual_user, auth->a_mutual_secret);
1674                 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next)
1675                         fprintf(stderr, "\t initiator-name %s\n",
1676                             auth_name->an_initator_name);
1677                 TAILQ_FOREACH(auth_portal, &ag->ag_portals, ap_next)
1678                         fprintf(stderr, "\t initiator-portal %s\n",
1679                             auth_portal->ap_initator_portal);
1680                 fprintf(stderr, "}\n");
1681         }
1682         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1683                 fprintf(stderr, "portal-group %s {\n", pg->pg_name);
1684                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
1685                         fprintf(stderr, "\t listen %s\n", portal->p_listen);
1686                 fprintf(stderr, "}\n");
1687         }
1688         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1689                 fprintf(stderr, "\tlun %s {\n", lun->l_name);
1690                 fprintf(stderr, "\t\tpath %s\n", lun->l_path);
1691                 TAILQ_FOREACH(o, &lun->l_options, o_next)
1692                         fprintf(stderr, "\t\toption %s %s\n",
1693                             o->o_name, o->o_value);
1694                 fprintf(stderr, "\t}\n");
1695         }
1696         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1697                 fprintf(stderr, "target %s {\n", targ->t_name);
1698                 if (targ->t_alias != NULL)
1699                         fprintf(stderr, "\t alias %s\n", targ->t_alias);
1700                 fprintf(stderr, "}\n");
1701         }
1702 }
1703 #endif
1704
1705 static int
1706 conf_verify_lun(struct lun *lun)
1707 {
1708         const struct lun *lun2;
1709
1710         if (lun->l_backend == NULL)
1711                 lun_set_backend(lun, "block");
1712         if (strcmp(lun->l_backend, "block") == 0) {
1713                 if (lun->l_path == NULL) {
1714                         log_warnx("missing path for lun \"%s\"",
1715                             lun->l_name);
1716                         return (1);
1717                 }
1718         } else if (strcmp(lun->l_backend, "ramdisk") == 0) {
1719                 if (lun->l_size == 0) {
1720                         log_warnx("missing size for ramdisk-backed lun \"%s\"",
1721                             lun->l_name);
1722                         return (1);
1723                 }
1724                 if (lun->l_path != NULL) {
1725                         log_warnx("path must not be specified "
1726                             "for ramdisk-backed lun \"%s\"",
1727                             lun->l_name);
1728                         return (1);
1729                 }
1730         }
1731         if (lun->l_blocksize == 0) {
1732                 if (lun->l_device_type == 5)
1733                         lun_set_blocksize(lun, DEFAULT_CD_BLOCKSIZE);
1734                 else
1735                         lun_set_blocksize(lun, DEFAULT_BLOCKSIZE);
1736         } else if (lun->l_blocksize < 0) {
1737                 log_warnx("invalid blocksize for lun \"%s\"; "
1738                     "must be larger than 0", lun->l_name);
1739                 return (1);
1740         }
1741         if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) {
1742                 log_warnx("invalid size for lun \"%s\"; "
1743                     "must be multiple of blocksize", lun->l_name);
1744                 return (1);
1745         }
1746         TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) {
1747                 if (lun == lun2)
1748                         continue;
1749                 if (lun->l_path != NULL && lun2->l_path != NULL &&
1750                     strcmp(lun->l_path, lun2->l_path) == 0) {
1751                         log_debugx("WARNING: path \"%s\" duplicated "
1752                             "between lun \"%s\", and "
1753                             "lun \"%s\"", lun->l_path,
1754                             lun->l_name, lun2->l_name);
1755                 }
1756         }
1757
1758         return (0);
1759 }
1760
1761 int
1762 conf_verify(struct conf *conf)
1763 {
1764         struct auth_group *ag;
1765         struct portal_group *pg;
1766         struct port *port;
1767         struct target *targ;
1768         struct lun *lun;
1769         bool found;
1770         int error, i;
1771
1772         if (conf->conf_pidfile_path == NULL)
1773                 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE);
1774
1775         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1776                 error = conf_verify_lun(lun);
1777                 if (error != 0)
1778                         return (error);
1779         }
1780         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1781                 if (targ->t_auth_group == NULL) {
1782                         targ->t_auth_group = auth_group_find(conf,
1783                             "default");
1784                         assert(targ->t_auth_group != NULL);
1785                 }
1786                 if (TAILQ_EMPTY(&targ->t_ports)) {
1787                         pg = portal_group_find(conf, "default");
1788                         assert(pg != NULL);
1789                         port_new(conf, targ, pg);
1790                 }
1791                 found = false;
1792                 for (i = 0; i < MAX_LUNS; i++) {
1793                         if (targ->t_luns[i] != NULL)
1794                                 found = true;
1795                 }
1796                 if (!found && targ->t_redirection == NULL) {
1797                         log_warnx("no LUNs defined for target \"%s\"",
1798                             targ->t_name);
1799                 }
1800                 if (found && targ->t_redirection != NULL) {
1801                         log_debugx("target \"%s\" contains luns, "
1802                             " but configured for redirection",
1803                             targ->t_name);
1804                 }
1805         }
1806         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1807                 assert(pg->pg_name != NULL);
1808                 if (pg->pg_discovery_auth_group == NULL) {
1809                         pg->pg_discovery_auth_group =
1810                             auth_group_find(conf, "default");
1811                         assert(pg->pg_discovery_auth_group != NULL);
1812                 }
1813
1814                 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN)
1815                         pg->pg_discovery_filter = PG_FILTER_NONE;
1816
1817                 if (pg->pg_redirection != NULL) {
1818                         if (!TAILQ_EMPTY(&pg->pg_ports)) {
1819                                 log_debugx("portal-group \"%s\" assigned "
1820                                     "to target, but configured "
1821                                     "for redirection",
1822                                     pg->pg_name);
1823                         }
1824                         pg->pg_unassigned = false;
1825                 } else if (!TAILQ_EMPTY(&pg->pg_ports)) {
1826                         pg->pg_unassigned = false;
1827                 } else {
1828                         if (strcmp(pg->pg_name, "default") != 0)
1829                                 log_warnx("portal-group \"%s\" not assigned "
1830                                     "to any target", pg->pg_name);
1831                         pg->pg_unassigned = true;
1832                 }
1833         }
1834         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1835                 if (ag->ag_name == NULL)
1836                         assert(ag->ag_target != NULL);
1837                 else
1838                         assert(ag->ag_target == NULL);
1839
1840                 found = false;
1841                 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1842                         if (targ->t_auth_group == ag) {
1843                                 found = true;
1844                                 break;
1845                         }
1846                 }
1847                 TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1848                         if (port->p_auth_group == ag) {
1849                                 found = true;
1850                                 break;
1851                         }
1852                 }
1853                 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1854                         if (pg->pg_discovery_auth_group == ag) {
1855                                 found = true;
1856                                 break;
1857                         }
1858                 }
1859                 if (!found && ag->ag_name != NULL &&
1860                     strcmp(ag->ag_name, "default") != 0 &&
1861                     strcmp(ag->ag_name, "no-authentication") != 0 &&
1862                     strcmp(ag->ag_name, "no-access") != 0) {
1863                         log_warnx("auth-group \"%s\" not assigned "
1864                             "to any target", ag->ag_name);
1865                 }
1866         }
1867
1868         return (0);
1869 }
1870
1871 static int
1872 conf_apply(struct conf *oldconf, struct conf *newconf)
1873 {
1874         struct lun *oldlun, *newlun, *tmplun;
1875         struct portal_group *oldpg, *newpg;
1876         struct portal *oldp, *newp;
1877         struct port *oldport, *newport, *tmpport;
1878         struct isns *oldns, *newns;
1879         pid_t otherpid;
1880         int changed, cumulated_error = 0, error, sockbuf;
1881         int one = 1;
1882
1883         if (oldconf->conf_debug != newconf->conf_debug) {
1884                 log_debugx("changing debug level to %d", newconf->conf_debug);
1885                 log_init(newconf->conf_debug);
1886         }
1887
1888         if (oldconf->conf_pidfh != NULL) {
1889                 assert(oldconf->conf_pidfile_path != NULL);
1890                 if (newconf->conf_pidfile_path != NULL &&
1891                     strcmp(oldconf->conf_pidfile_path,
1892                     newconf->conf_pidfile_path) == 0) {
1893                         newconf->conf_pidfh = oldconf->conf_pidfh;
1894                         oldconf->conf_pidfh = NULL;
1895                 } else {
1896                         log_debugx("removing pidfile %s",
1897                             oldconf->conf_pidfile_path);
1898                         pidfile_remove(oldconf->conf_pidfh);
1899                         oldconf->conf_pidfh = NULL;
1900                 }
1901         }
1902
1903         if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) {
1904                 log_debugx("opening pidfile %s", newconf->conf_pidfile_path);
1905                 newconf->conf_pidfh =
1906                     pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid);
1907                 if (newconf->conf_pidfh == NULL) {
1908                         if (errno == EEXIST)
1909                                 log_errx(1, "daemon already running, pid: %jd.",
1910                                     (intmax_t)otherpid);
1911                         log_err(1, "cannot open or create pidfile \"%s\"",
1912                             newconf->conf_pidfile_path);
1913                 }
1914         }
1915
1916         /*
1917          * Go through the new portal groups, assigning tags or preserving old.
1918          */
1919         TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
1920                 if (newpg->pg_tag != 0)
1921                         continue;
1922                 oldpg = portal_group_find(oldconf, newpg->pg_name);
1923                 if (oldpg != NULL)
1924                         newpg->pg_tag = oldpg->pg_tag;
1925                 else
1926                         newpg->pg_tag = ++last_portal_group_tag;
1927         }
1928
1929         /* Deregister on removed iSNS servers. */
1930         TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
1931                 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
1932                         if (strcmp(oldns->i_addr, newns->i_addr) == 0)
1933                                 break;
1934                 }
1935                 if (newns == NULL)
1936                         isns_deregister(oldns);
1937         }
1938
1939         /*
1940          * XXX: If target or lun removal fails, we should somehow "move"
1941          *      the old lun or target into newconf, so that subsequent
1942          *      conf_apply() would try to remove them again.  That would
1943          *      be somewhat hairy, though, and lun deletion failures don't
1944          *      really happen, so leave it as it is for now.
1945          */
1946         /*
1947          * First, remove any ports present in the old configuration
1948          * and missing in the new one.
1949          */
1950         TAILQ_FOREACH_SAFE(oldport, &oldconf->conf_ports, p_next, tmpport) {
1951                 if (port_is_dummy(oldport))
1952                         continue;
1953                 newport = port_find(newconf, oldport->p_name);
1954                 if (newport != NULL && !port_is_dummy(newport))
1955                         continue;
1956                 log_debugx("removing port \"%s\"", oldport->p_name);
1957                 error = kernel_port_remove(oldport);
1958                 if (error != 0) {
1959                         log_warnx("failed to remove port %s",
1960                             oldport->p_name);
1961                         /*
1962                          * XXX: Uncomment after fixing the root cause.
1963                          *
1964                          * cumulated_error++;
1965                          */
1966                 }
1967         }
1968
1969         /*
1970          * Second, remove any LUNs present in the old configuration
1971          * and missing in the new one.
1972          */
1973         TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) {
1974                 newlun = lun_find(newconf, oldlun->l_name);
1975                 if (newlun == NULL) {
1976                         log_debugx("lun \"%s\", CTL lun %d "
1977                             "not found in new configuration; "
1978                             "removing", oldlun->l_name, oldlun->l_ctl_lun);
1979                         error = kernel_lun_remove(oldlun);
1980                         if (error != 0) {
1981                                 log_warnx("failed to remove lun \"%s\", "
1982                                     "CTL lun %d",
1983                                     oldlun->l_name, oldlun->l_ctl_lun);
1984                                 cumulated_error++;
1985                         }
1986                         continue;
1987                 }
1988
1989                 /*
1990                  * Also remove the LUNs changed by more than size.
1991                  */
1992                 changed = 0;
1993                 assert(oldlun->l_backend != NULL);
1994                 assert(newlun->l_backend != NULL);
1995                 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) {
1996                         log_debugx("backend for lun \"%s\", "
1997                             "CTL lun %d changed; removing",
1998                             oldlun->l_name, oldlun->l_ctl_lun);
1999                         changed = 1;
2000                 }
2001                 if (oldlun->l_blocksize != newlun->l_blocksize) {
2002                         log_debugx("blocksize for lun \"%s\", "
2003                             "CTL lun %d changed; removing",
2004                             oldlun->l_name, oldlun->l_ctl_lun);
2005                         changed = 1;
2006                 }
2007                 if (newlun->l_device_id != NULL &&
2008                     (oldlun->l_device_id == NULL ||
2009                      strcmp(oldlun->l_device_id, newlun->l_device_id) !=
2010                      0)) {
2011                         log_debugx("device-id for lun \"%s\", "
2012                             "CTL lun %d changed; removing",
2013                             oldlun->l_name, oldlun->l_ctl_lun);
2014                         changed = 1;
2015                 }
2016                 if (newlun->l_path != NULL &&
2017                     (oldlun->l_path == NULL ||
2018                      strcmp(oldlun->l_path, newlun->l_path) != 0)) {
2019                         log_debugx("path for lun \"%s\", "
2020                             "CTL lun %d, changed; removing",
2021                             oldlun->l_name, oldlun->l_ctl_lun);
2022                         changed = 1;
2023                 }
2024                 if (newlun->l_serial != NULL &&
2025                     (oldlun->l_serial == NULL ||
2026                      strcmp(oldlun->l_serial, newlun->l_serial) != 0)) {
2027                         log_debugx("serial for lun \"%s\", "
2028                             "CTL lun %d changed; removing",
2029                             oldlun->l_name, oldlun->l_ctl_lun);
2030                         changed = 1;
2031                 }
2032                 if (changed) {
2033                         error = kernel_lun_remove(oldlun);
2034                         if (error != 0) {
2035                                 log_warnx("failed to remove lun \"%s\", "
2036                                     "CTL lun %d",
2037                                     oldlun->l_name, oldlun->l_ctl_lun);
2038                                 cumulated_error++;
2039                         }
2040                         lun_delete(oldlun);
2041                         continue;
2042                 }
2043
2044                 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun);
2045         }
2046
2047         TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) {
2048                 oldlun = lun_find(oldconf, newlun->l_name);
2049                 if (oldlun != NULL) {
2050                         log_debugx("modifying lun \"%s\", CTL lun %d",
2051                             newlun->l_name, newlun->l_ctl_lun);
2052                         error = kernel_lun_modify(newlun);
2053                         if (error != 0) {
2054                                 log_warnx("failed to "
2055                                     "modify lun \"%s\", CTL lun %d",
2056                                     newlun->l_name, newlun->l_ctl_lun);
2057                                 cumulated_error++;
2058                         }
2059                         continue;
2060                 }
2061                 log_debugx("adding lun \"%s\"", newlun->l_name);
2062                 error = kernel_lun_add(newlun);
2063                 if (error != 0) {
2064                         log_warnx("failed to add lun \"%s\"", newlun->l_name);
2065                         lun_delete(newlun);
2066                         cumulated_error++;
2067                 }
2068         }
2069
2070         /*
2071          * Now add new ports or modify existing ones.
2072          */
2073         TAILQ_FOREACH(newport, &newconf->conf_ports, p_next) {
2074                 if (port_is_dummy(newport))
2075                         continue;
2076                 oldport = port_find(oldconf, newport->p_name);
2077
2078                 if (oldport == NULL || port_is_dummy(oldport)) {
2079                         log_debugx("adding port \"%s\"", newport->p_name);
2080                         error = kernel_port_add(newport);
2081                 } else {
2082                         log_debugx("updating port \"%s\"", newport->p_name);
2083                         newport->p_ctl_port = oldport->p_ctl_port;
2084                         error = kernel_port_update(newport, oldport);
2085                 }
2086                 if (error != 0) {
2087                         log_warnx("failed to %s port %s",
2088                             (oldport == NULL) ? "add" : "update",
2089                             newport->p_name);
2090                         /*
2091                          * XXX: Uncomment after fixing the root cause.
2092                          *
2093                          * cumulated_error++;
2094                          */
2095                 }
2096         }
2097
2098         /*
2099          * Go through the new portals, opening the sockets as necessary.
2100          */
2101         TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
2102                 if (newpg->pg_foreign)
2103                         continue;
2104                 if (newpg->pg_unassigned) {
2105                         log_debugx("not listening on portal-group \"%s\", "
2106                             "not assigned to any target",
2107                             newpg->pg_name);
2108                         continue;
2109                 }
2110                 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) {
2111                         /*
2112                          * Try to find already open portal and reuse
2113                          * the listening socket.  We don't care about
2114                          * what portal or portal group that was, what
2115                          * matters is the listening address.
2116                          */
2117                         TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups,
2118                             pg_next) {
2119                                 TAILQ_FOREACH(oldp, &oldpg->pg_portals,
2120                                     p_next) {
2121                                         if (strcmp(newp->p_listen,
2122                                             oldp->p_listen) == 0 &&
2123                                             oldp->p_socket > 0) {
2124                                                 newp->p_socket =
2125                                                     oldp->p_socket;
2126                                                 oldp->p_socket = 0;
2127                                                 break;
2128                                         }
2129                                 }
2130                         }
2131                         if (newp->p_socket > 0) {
2132                                 /*
2133                                  * We're done with this portal.
2134                                  */
2135                                 continue;
2136                         }
2137
2138 #ifdef ICL_KERNEL_PROXY
2139                         if (proxy_mode) {
2140                                 newpg->pg_conf->conf_portal_id++;
2141                                 newp->p_id = newpg->pg_conf->conf_portal_id;
2142                                 log_debugx("listening on %s, portal-group "
2143                                     "\"%s\", portal id %d, using ICL proxy",
2144                                     newp->p_listen, newpg->pg_name, newp->p_id);
2145                                 kernel_listen(newp->p_ai, newp->p_iser,
2146                                     newp->p_id);
2147                                 continue;
2148                         }
2149 #endif
2150                         assert(proxy_mode == false);
2151                         assert(newp->p_iser == false);
2152
2153                         log_debugx("listening on %s, portal-group \"%s\"",
2154                             newp->p_listen, newpg->pg_name);
2155                         newp->p_socket = socket(newp->p_ai->ai_family,
2156                             newp->p_ai->ai_socktype,
2157                             newp->p_ai->ai_protocol);
2158                         if (newp->p_socket < 0) {
2159                                 log_warn("socket(2) failed for %s",
2160                                     newp->p_listen);
2161                                 cumulated_error++;
2162                                 continue;
2163                         }
2164                         sockbuf = SOCKBUF_SIZE;
2165                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF,
2166                             &sockbuf, sizeof(sockbuf)) == -1)
2167                                 log_warn("setsockopt(SO_RCVBUF) failed "
2168                                     "for %s", newp->p_listen);
2169                         sockbuf = SOCKBUF_SIZE;
2170                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF,
2171                             &sockbuf, sizeof(sockbuf)) == -1)
2172                                 log_warn("setsockopt(SO_SNDBUF) failed "
2173                                     "for %s", newp->p_listen);
2174                         error = setsockopt(newp->p_socket, SOL_SOCKET,
2175                             SO_REUSEADDR, &one, sizeof(one));
2176                         if (error != 0) {
2177                                 log_warn("setsockopt(SO_REUSEADDR) failed "
2178                                     "for %s", newp->p_listen);
2179                                 close(newp->p_socket);
2180                                 newp->p_socket = 0;
2181                                 cumulated_error++;
2182                                 continue;
2183                         }
2184                         error = bind(newp->p_socket, newp->p_ai->ai_addr,
2185                             newp->p_ai->ai_addrlen);
2186                         if (error != 0) {
2187                                 log_warn("bind(2) failed for %s",
2188                                     newp->p_listen);
2189                                 close(newp->p_socket);
2190                                 newp->p_socket = 0;
2191                                 cumulated_error++;
2192                                 continue;
2193                         }
2194                         error = listen(newp->p_socket, -1);
2195                         if (error != 0) {
2196                                 log_warn("listen(2) failed for %s",
2197                                     newp->p_listen);
2198                                 close(newp->p_socket);
2199                                 newp->p_socket = 0;
2200                                 cumulated_error++;
2201                                 continue;
2202                         }
2203                 }
2204         }
2205
2206         /*
2207          * Go through the no longer used sockets, closing them.
2208          */
2209         TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) {
2210                 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) {
2211                         if (oldp->p_socket <= 0)
2212                                 continue;
2213                         log_debugx("closing socket for %s, portal-group \"%s\"",
2214                             oldp->p_listen, oldpg->pg_name);
2215                         close(oldp->p_socket);
2216                         oldp->p_socket = 0;
2217                 }
2218         }
2219
2220         /* (Re-)Register on remaining/new iSNS servers. */
2221         TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
2222                 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
2223                         if (strcmp(oldns->i_addr, newns->i_addr) == 0)
2224                                 break;
2225                 }
2226                 isns_register(newns, oldns);
2227         }
2228
2229         /* Schedule iSNS update */
2230         if (!TAILQ_EMPTY(&newconf->conf_isns))
2231                 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2232
2233         return (cumulated_error);
2234 }
2235
2236 bool
2237 timed_out(void)
2238 {
2239
2240         return (sigalrm_received);
2241 }
2242
2243 static void
2244 sigalrm_handler_fatal(int dummy __unused)
2245 {
2246         /*
2247          * It would be easiest to just log an error and exit.  We can't
2248          * do this, though, because log_errx() is not signal safe, since
2249          * it calls syslog(3).  Instead, set a flag checked by pdu_send()
2250          * and pdu_receive(), to call log_errx() there.  Should they fail
2251          * to notice, we'll exit here one second later.
2252          */
2253         if (sigalrm_received) {
2254                 /*
2255                  * Oh well.  Just give up and quit.
2256                  */
2257                 _exit(2);
2258         }
2259
2260         sigalrm_received = true;
2261 }
2262
2263 static void
2264 sigalrm_handler(int dummy __unused)
2265 {
2266
2267         sigalrm_received = true;
2268 }
2269
2270 void
2271 set_timeout(int timeout, int fatal)
2272 {
2273         struct sigaction sa;
2274         struct itimerval itv;
2275         int error;
2276
2277         if (timeout <= 0) {
2278                 log_debugx("session timeout disabled");
2279                 bzero(&itv, sizeof(itv));
2280                 error = setitimer(ITIMER_REAL, &itv, NULL);
2281                 if (error != 0)
2282                         log_err(1, "setitimer");
2283                 sigalrm_received = false;
2284                 return;
2285         }
2286
2287         sigalrm_received = false;
2288         bzero(&sa, sizeof(sa));
2289         if (fatal)
2290                 sa.sa_handler = sigalrm_handler_fatal;
2291         else
2292                 sa.sa_handler = sigalrm_handler;
2293         sigfillset(&sa.sa_mask);
2294         error = sigaction(SIGALRM, &sa, NULL);
2295         if (error != 0)
2296                 log_err(1, "sigaction");
2297
2298         /*
2299          * First SIGALRM will arive after conf_timeout seconds.
2300          * If we do nothing, another one will arrive a second later.
2301          */
2302         log_debugx("setting session timeout to %d seconds", timeout);
2303         bzero(&itv, sizeof(itv));
2304         itv.it_interval.tv_sec = 1;
2305         itv.it_value.tv_sec = timeout;
2306         error = setitimer(ITIMER_REAL, &itv, NULL);
2307         if (error != 0)
2308                 log_err(1, "setitimer");
2309 }
2310
2311 static int
2312 wait_for_children(bool block)
2313 {
2314         pid_t pid;
2315         int status;
2316         int num = 0;
2317
2318         for (;;) {
2319                 /*
2320                  * If "block" is true, wait for at least one process.
2321                  */
2322                 if (block && num == 0)
2323                         pid = wait4(-1, &status, 0, NULL);
2324                 else
2325                         pid = wait4(-1, &status, WNOHANG, NULL);
2326                 if (pid <= 0)
2327                         break;
2328                 if (WIFSIGNALED(status)) {
2329                         log_warnx("child process %d terminated with signal %d",
2330                             pid, WTERMSIG(status));
2331                 } else if (WEXITSTATUS(status) != 0) {
2332                         log_warnx("child process %d terminated with exit status %d",
2333                             pid, WEXITSTATUS(status));
2334                 } else {
2335                         log_debugx("child process %d terminated gracefully", pid);
2336                 }
2337                 num++;
2338         }
2339
2340         return (num);
2341 }
2342
2343 static void
2344 handle_connection(struct portal *portal, int fd,
2345     const struct sockaddr *client_sa, bool dont_fork)
2346 {
2347         struct connection *conn;
2348         int error;
2349         pid_t pid;
2350         char host[NI_MAXHOST + 1];
2351         struct conf *conf;
2352
2353         conf = portal->p_portal_group->pg_conf;
2354
2355         if (dont_fork) {
2356                 log_debugx("incoming connection; not forking due to -d flag");
2357         } else {
2358                 nchildren -= wait_for_children(false);
2359                 assert(nchildren >= 0);
2360
2361                 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) {
2362                         log_debugx("maxproc limit of %d child processes hit; "
2363                             "waiting for child process to exit", conf->conf_maxproc);
2364                         nchildren -= wait_for_children(true);
2365                         assert(nchildren >= 0);
2366                 }
2367                 log_debugx("incoming connection; forking child process #%d",
2368                     nchildren);
2369                 nchildren++;
2370                 pid = fork();
2371                 if (pid < 0)
2372                         log_err(1, "fork");
2373                 if (pid > 0) {
2374                         close(fd);
2375                         return;
2376                 }
2377         }
2378         pidfile_close(conf->conf_pidfh);
2379
2380         error = getnameinfo(client_sa, client_sa->sa_len,
2381             host, sizeof(host), NULL, 0, NI_NUMERICHOST);
2382         if (error != 0)
2383                 log_errx(1, "getnameinfo: %s", gai_strerror(error));
2384
2385         log_debugx("accepted connection from %s; portal group \"%s\"",
2386             host, portal->p_portal_group->pg_name);
2387         log_set_peer_addr(host);
2388         setproctitle("%s", host);
2389
2390         conn = connection_new(portal, fd, host, client_sa);
2391         set_timeout(conf->conf_timeout, true);
2392         kernel_capsicate();
2393         login(conn);
2394         if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
2395                 kernel_handoff(conn);
2396                 log_debugx("connection handed off to the kernel");
2397         } else {
2398                 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
2399                 discovery(conn);
2400         }
2401         log_debugx("nothing more to do; exiting");
2402         exit(0);
2403 }
2404
2405 static int
2406 fd_add(int fd, fd_set *fdset, int nfds)
2407 {
2408
2409         /*
2410          * Skip sockets which we failed to bind.
2411          */
2412         if (fd <= 0)
2413                 return (nfds);
2414
2415         FD_SET(fd, fdset);
2416         if (fd > nfds)
2417                 nfds = fd;
2418         return (nfds);
2419 }
2420
2421 static void
2422 main_loop(struct conf *conf, bool dont_fork)
2423 {
2424         struct portal_group *pg;
2425         struct portal *portal;
2426         struct sockaddr_storage client_sa;
2427         socklen_t client_salen;
2428 #ifdef ICL_KERNEL_PROXY
2429         int connection_id;
2430         int portal_id;
2431 #endif
2432         fd_set fdset;
2433         int error, nfds, client_fd;
2434
2435         pidfile_write(conf->conf_pidfh);
2436
2437         for (;;) {
2438                 if (sighup_received || sigterm_received || timed_out())
2439                         return;
2440
2441 #ifdef ICL_KERNEL_PROXY
2442                 if (proxy_mode) {
2443                         client_salen = sizeof(client_sa);
2444                         kernel_accept(&connection_id, &portal_id,
2445                             (struct sockaddr *)&client_sa, &client_salen);
2446                         assert(client_salen >= client_sa.ss_len);
2447
2448                         log_debugx("incoming connection, id %d, portal id %d",
2449                             connection_id, portal_id);
2450                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2451                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2452                                         if (portal->p_id == portal_id) {
2453                                                 goto found;
2454                                         }
2455                                 }
2456                         }
2457
2458                         log_errx(1, "kernel returned invalid portal_id %d",
2459                             portal_id);
2460
2461 found:
2462                         handle_connection(portal, connection_id,
2463                             (struct sockaddr *)&client_sa, dont_fork);
2464                 } else {
2465 #endif
2466                         assert(proxy_mode == false);
2467
2468                         FD_ZERO(&fdset);
2469                         nfds = 0;
2470                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2471                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
2472                                         nfds = fd_add(portal->p_socket, &fdset, nfds);
2473                         }
2474                         error = select(nfds + 1, &fdset, NULL, NULL, NULL);
2475                         if (error <= 0) {
2476                                 if (errno == EINTR)
2477                                         return;
2478                                 log_err(1, "select");
2479                         }
2480                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2481                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2482                                         if (!FD_ISSET(portal->p_socket, &fdset))
2483                                                 continue;
2484                                         client_salen = sizeof(client_sa);
2485                                         client_fd = accept(portal->p_socket,
2486                                             (struct sockaddr *)&client_sa,
2487                                             &client_salen);
2488                                         if (client_fd < 0) {
2489                                                 if (errno == ECONNABORTED)
2490                                                         continue;
2491                                                 log_err(1, "accept");
2492                                         }
2493                                         assert(client_salen >= client_sa.ss_len);
2494
2495                                         handle_connection(portal, client_fd,
2496                                             (struct sockaddr *)&client_sa,
2497                                             dont_fork);
2498                                         break;
2499                                 }
2500                         }
2501 #ifdef ICL_KERNEL_PROXY
2502                 }
2503 #endif
2504         }
2505 }
2506
2507 static void
2508 sighup_handler(int dummy __unused)
2509 {
2510
2511         sighup_received = true;
2512 }
2513
2514 static void
2515 sigterm_handler(int dummy __unused)
2516 {
2517
2518         sigterm_received = true;
2519 }
2520
2521 static void
2522 sigchld_handler(int dummy __unused)
2523 {
2524
2525         /*
2526          * The only purpose of this handler is to make SIGCHLD
2527          * interrupt the ISCSIDWAIT ioctl(2), so we can call
2528          * wait_for_children().
2529          */
2530 }
2531
2532 static void
2533 register_signals(void)
2534 {
2535         struct sigaction sa;
2536         int error;
2537
2538         bzero(&sa, sizeof(sa));
2539         sa.sa_handler = sighup_handler;
2540         sigfillset(&sa.sa_mask);
2541         error = sigaction(SIGHUP, &sa, NULL);
2542         if (error != 0)
2543                 log_err(1, "sigaction");
2544
2545         sa.sa_handler = sigterm_handler;
2546         error = sigaction(SIGTERM, &sa, NULL);
2547         if (error != 0)
2548                 log_err(1, "sigaction");
2549
2550         sa.sa_handler = sigterm_handler;
2551         error = sigaction(SIGINT, &sa, NULL);
2552         if (error != 0)
2553                 log_err(1, "sigaction");
2554
2555         sa.sa_handler = sigchld_handler;
2556         error = sigaction(SIGCHLD, &sa, NULL);
2557         if (error != 0)
2558                 log_err(1, "sigaction");
2559 }
2560
2561 static void
2562 check_perms(const char *path)
2563 {
2564         struct stat sb;
2565         int error;
2566
2567         error = stat(path, &sb);
2568         if (error != 0) {
2569                 log_warn("stat");
2570                 return;
2571         }
2572         if (sb.st_mode & S_IWOTH) {
2573                 log_warnx("%s is world-writable", path);
2574         } else if (sb.st_mode & S_IROTH) {
2575                 log_warnx("%s is world-readable", path);
2576         } else if (sb.st_mode & S_IXOTH) {
2577                 /*
2578                  * Ok, this one doesn't matter, but still do it,
2579                  * just for consistency.
2580                  */
2581                 log_warnx("%s is world-executable", path);
2582         }
2583
2584         /*
2585          * XXX: Should we also check for owner != 0?
2586          */
2587 }
2588
2589 static struct conf *
2590 conf_new_from_file(const char *path, struct conf *oldconf, bool ucl)
2591 {
2592         struct conf *conf;
2593         struct auth_group *ag;
2594         struct portal_group *pg;
2595         struct pport *pp;
2596         int error;
2597
2598         log_debugx("obtaining configuration from %s", path);
2599
2600         conf = conf_new();
2601
2602         TAILQ_FOREACH(pp, &oldconf->conf_pports, pp_next)
2603                 pport_copy(pp, conf);
2604
2605         ag = auth_group_new(conf, "default");
2606         assert(ag != NULL);
2607
2608         ag = auth_group_new(conf, "no-authentication");
2609         assert(ag != NULL);
2610         ag->ag_type = AG_TYPE_NO_AUTHENTICATION;
2611
2612         ag = auth_group_new(conf, "no-access");
2613         assert(ag != NULL);
2614         ag->ag_type = AG_TYPE_DENY;
2615
2616         pg = portal_group_new(conf, "default");
2617         assert(pg != NULL);
2618
2619         if (ucl)
2620                 error = uclparse_conf(conf, path);
2621         else
2622                 error = parse_conf(conf, path);
2623
2624         if (error != 0) {
2625                 conf_delete(conf);
2626                 return (NULL);
2627         }
2628
2629         check_perms(path);
2630
2631         if (conf->conf_default_ag_defined == false) {
2632                 log_debugx("auth-group \"default\" not defined; "
2633                     "going with defaults");
2634                 ag = auth_group_find(conf, "default");
2635                 assert(ag != NULL);
2636                 ag->ag_type = AG_TYPE_DENY;
2637         }
2638
2639         if (conf->conf_default_pg_defined == false) {
2640                 log_debugx("portal-group \"default\" not defined; "
2641                     "going with defaults");
2642                 pg = portal_group_find(conf, "default");
2643                 assert(pg != NULL);
2644                 portal_group_add_listen(pg, "0.0.0.0:3260", false);
2645                 portal_group_add_listen(pg, "[::]:3260", false);
2646         }
2647
2648         conf->conf_kernel_port_on = true;
2649
2650         error = conf_verify(conf);
2651         if (error != 0) {
2652                 conf_delete(conf);
2653                 return (NULL);
2654         }
2655
2656         return (conf);
2657 }
2658
2659 int
2660 main(int argc, char **argv)
2661 {
2662         struct conf *oldconf, *newconf, *tmpconf;
2663         struct isns *newns;
2664         const char *config_path = DEFAULT_CONFIG_PATH;
2665         int debug = 0, ch, error;
2666         bool dont_daemonize = false;
2667         bool test_config = false;
2668         bool use_ucl = false;
2669
2670         while ((ch = getopt(argc, argv, "dtuf:R")) != -1) {
2671                 switch (ch) {
2672                 case 'd':
2673                         dont_daemonize = true;
2674                         debug++;
2675                         break;
2676                 case 't':
2677                         test_config = true;
2678                         break;
2679                 case 'u':
2680                         use_ucl = true;
2681                         break;
2682                 case 'f':
2683                         config_path = optarg;
2684                         break;
2685                 case 'R':
2686 #ifndef ICL_KERNEL_PROXY
2687                         log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY "
2688                             "does not support iSER protocol");
2689 #endif
2690                         proxy_mode = true;
2691                         break;
2692                 case '?':
2693                 default:
2694                         usage();
2695                 }
2696         }
2697         argc -= optind;
2698         if (argc != 0)
2699                 usage();
2700
2701         log_init(debug);
2702         kernel_init();
2703
2704         oldconf = conf_new_from_kernel();
2705         newconf = conf_new_from_file(config_path, oldconf, use_ucl);
2706
2707         if (newconf == NULL)
2708                 log_errx(1, "configuration error; exiting");
2709
2710         if (test_config)
2711                 return (0);
2712
2713         if (debug > 0) {
2714                 oldconf->conf_debug = debug;
2715                 newconf->conf_debug = debug;
2716         }
2717
2718         error = conf_apply(oldconf, newconf);
2719         if (error != 0)
2720                 log_errx(1, "failed to apply configuration; exiting");
2721
2722         conf_delete(oldconf);
2723         oldconf = NULL;
2724
2725         register_signals();
2726
2727         if (dont_daemonize == false) {
2728                 log_debugx("daemonizing");
2729                 if (daemon(0, 0) == -1) {
2730                         log_warn("cannot daemonize");
2731                         pidfile_remove(newconf->conf_pidfh);
2732                         exit(1);
2733                 }
2734         }
2735
2736         /* Schedule iSNS update */
2737         if (!TAILQ_EMPTY(&newconf->conf_isns))
2738                 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2739
2740         for (;;) {
2741                 main_loop(newconf, dont_daemonize);
2742                 if (sighup_received) {
2743                         sighup_received = false;
2744                         log_debugx("received SIGHUP, reloading configuration");
2745                         tmpconf = conf_new_from_file(config_path, newconf,
2746                             use_ucl);
2747
2748                         if (tmpconf == NULL) {
2749                                 log_warnx("configuration error, "
2750                                     "continuing with old configuration");
2751                         } else {
2752                                 if (debug > 0)
2753                                         tmpconf->conf_debug = debug;
2754                                 oldconf = newconf;
2755                                 newconf = tmpconf;
2756                                 error = conf_apply(oldconf, newconf);
2757                                 if (error != 0)
2758                                         log_warnx("failed to reload "
2759                                             "configuration");
2760                                 conf_delete(oldconf);
2761                                 oldconf = NULL;
2762                         }
2763                 } else if (sigterm_received) {
2764                         log_debugx("exiting on signal; "
2765                             "reloading empty configuration");
2766
2767                         log_debugx("removing CTL iSCSI ports "
2768                             "and terminating all connections");
2769
2770                         oldconf = newconf;
2771                         newconf = conf_new();
2772                         if (debug > 0)
2773                                 newconf->conf_debug = debug;
2774                         error = conf_apply(oldconf, newconf);
2775                         if (error != 0)
2776                                 log_warnx("failed to apply configuration");
2777                         conf_delete(oldconf);
2778                         oldconf = NULL;
2779
2780                         log_warnx("exiting on signal");
2781                         exit(0);
2782                 } else {
2783                         nchildren -= wait_for_children(false);
2784                         assert(nchildren >= 0);
2785                         if (timed_out()) {
2786                                 set_timeout(0, false);
2787                                 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next)
2788                                         isns_check(newns);
2789                                 /* Schedule iSNS update */
2790                                 if (!TAILQ_EMPTY(&newconf->conf_isns)) {
2791                                         set_timeout((newconf->conf_isns_period
2792                                             + 2) / 3,
2793                                             false);
2794                                 }
2795                         }
2796                 }
2797         }
2798         /* NOTREACHED */
2799 }