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         pg->pg_dscp = -1;
 629         TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next);
 630
 631         return (pg);
 632 }
 633
 634 void
 635 portal_group_delete(struct portal_group *pg)
 636 {
 637         struct portal *portal, *tmp;
 638         struct port *port, *tport;
 639         struct option *o, *otmp;
 640
 641         TAILQ_FOREACH_SAFE(port, &pg->pg_ports, p_pgs, tport)
 642                 port_delete(port);
 643         TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next);
 644
 645         TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp)
 646                 portal_delete(portal);
 647         TAILQ_FOREACH_SAFE(o, &pg->pg_options, o_next, otmp)
 648                 option_delete(&pg->pg_options, o);
 649         free(pg->pg_name);
 650         free(pg->pg_offload);
 651         free(pg->pg_redirection);
 652         free(pg);
 653 }
 654
 655 struct portal_group *
 656 portal_group_find(const struct conf *conf, const char *name)
 657 {
 658         struct portal_group *pg;
 659
 660         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
 661                 if (strcmp(pg->pg_name, name) == 0)
 662                         return (pg);
 663         }
 664
 665         return (NULL);
 666 }
 667
 668 static int
 669 parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai)
 670 {
 671         struct addrinfo hints;
 672         char *str, *addr, *ch;
 673         const char *port;
 674         int error, colons = 0;
 675
 676         str = arg = strdup(arg);
 677         if (arg[0] == '[') {
 678                 /*
 679                  * IPv6 address in square brackets, perhaps with port.
 680                  */
 681                 arg++;
 682                 addr = strsep(&arg, "]");
 683                 if (arg == NULL) {
 684                         free(str);
 685                         return (1);
 686                 }
 687                 if (arg[0] == '\0') {
 688                         port = def_port;
 689                 } else if (arg[0] == ':') {
 690                         port = arg + 1;
 691                 } else {
 692                         free(str);
 693                         return (1);
 694                 }
 695         } else {
 696                 /*
 697                  * Either IPv6 address without brackets - and without
 698                  * a port - or IPv4 address.  Just count the colons.
 699                  */
 700                 for (ch = arg; *ch != '\0'; ch++) {
 701                         if (*ch == ':')
 702                                 colons++;
 703                 }
 704                 if (colons > 1) {
 705                         addr = arg;
 706                         port = def_port;
 707                 } else {
 708                         addr = strsep(&arg, ":");
 709                         if (arg == NULL)
 710                                 port = def_port;
 711                         else
 712                                 port = arg;
 713                 }
 714         }
 715
 716         memset(&hints, 0, sizeof(hints));
 717         hints.ai_family = PF_UNSPEC;
 718         hints.ai_socktype = SOCK_STREAM;
 719         hints.ai_flags = AI_PASSIVE;
 720         error = getaddrinfo(addr, port, &hints, ai);
 721         free(str);
 722         return ((error != 0) ? 1 : 0);
 723 }
 724
 725 int
 726 portal_group_add_listen(struct portal_group *pg, const char *value, bool iser)
 727 {
 728         struct portal *portal;
 729
 730         portal = portal_new(pg);
 731         portal->p_listen = checked_strdup(value);
 732         portal->p_iser = iser;
 733
 734         if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) {
 735                 log_warnx("invalid listen address %s", portal->p_listen);
 736                 portal_delete(portal);
 737                 return (1);
 738         }
 739
 740         /*
 741          * XXX: getaddrinfo(3) may return multiple addresses; we should turn
 742          *      those into multiple portals.
 743          */
 744
 745         return (0);
 746 }
 747
 748 int
 749 isns_new(struct conf *conf, const char *addr)
 750 {
 751         struct isns *isns;
 752
 753         isns = calloc(1, sizeof(*isns));
 754         if (isns == NULL)
 755                 log_err(1, "calloc");
 756         isns->i_conf = conf;
 757         TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next);
 758         isns->i_addr = checked_strdup(addr);
 759
 760         if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) {
 761                 log_warnx("invalid iSNS address %s", isns->i_addr);
 762                 isns_delete(isns);
 763                 return (1);
 764         }
 765
 766         /*
 767          * XXX: getaddrinfo(3) may return multiple addresses; we should turn
 768          *      those into multiple servers.
 769          */
 770
 771         return (0);
 772 }
 773
 774 void
 775 isns_delete(struct isns *isns)
 776 {
 777
 778         TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next);
 779         free(isns->i_addr);
 780         if (isns->i_ai != NULL)
 781                 freeaddrinfo(isns->i_ai);
 782         free(isns);
 783 }
 784
 785 static int
 786 isns_do_connect(struct isns *isns)
 787 {
 788         int s;
 789
 790         s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype,
 791             isns->i_ai->ai_protocol);
 792         if (s < 0) {
 793                 log_warn("socket(2) failed for %s", isns->i_addr);
 794                 return (-1);
 795         }
 796         if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) {
 797                 log_warn("connect(2) failed for %s", isns->i_addr);
 798                 close(s);
 799                 return (-1);
 800         }
 801         return(s);
 802 }
 803
 804 static int
 805 isns_do_register(struct isns *isns, int s, const char *hostname)
 806 {
 807         struct conf *conf = isns->i_conf;
 808         struct target *target;
 809         struct portal *portal;
 810         struct portal_group *pg;
 811         struct port *port;
 812         struct isns_req *req;
 813         int res = 0;
 814         uint32_t error;
 815
 816         req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT);
 817         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 818         isns_req_add_delim(req);
 819         isns_req_add_str(req, 1, hostname);
 820         isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */
 821         isns_req_add_32(req, 6, conf->conf_isns_period);
 822         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
 823                 if (pg->pg_unassigned)
 824                         continue;
 825                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
 826                         isns_req_add_addr(req, 16, portal->p_ai);
 827                         isns_req_add_port(req, 17, portal->p_ai);
 828                 }
 829         }
 830         TAILQ_FOREACH(target, &conf->conf_targets, t_next) {
 831                 isns_req_add_str(req, 32, target->t_name);
 832                 isns_req_add_32(req, 33, 1); /* 1 -- Target*/
 833                 if (target->t_alias != NULL)
 834                         isns_req_add_str(req, 34, target->t_alias);
 835                 TAILQ_FOREACH(port, &target->t_ports, p_ts) {
 836                         if ((pg = port->p_portal_group) == NULL)
 837                                 continue;
 838                         isns_req_add_32(req, 51, pg->pg_tag);
 839                         TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
 840                                 isns_req_add_addr(req, 49, portal->p_ai);
 841                                 isns_req_add_port(req, 50, portal->p_ai);
 842                         }
 843                 }
 844         }
 845         res = isns_req_send(s, req);
 846         if (res < 0) {
 847                 log_warn("send(2) failed for %s", isns->i_addr);
 848                 goto quit;
 849         }
 850         res = isns_req_receive(s, req);
 851         if (res < 0) {
 852                 log_warn("receive(2) failed for %s", isns->i_addr);
 853                 goto quit;
 854         }
 855         error = isns_req_get_status(req);
 856         if (error != 0) {
 857                 log_warnx("iSNS register error %d for %s", error, isns->i_addr);
 858                 res = -1;
 859         }
 860 quit:
 861         isns_req_free(req);
 862         return (res);
 863 }
 864
 865 static int
 866 isns_do_check(struct isns *isns, int s, const char *hostname)
 867 {
 868         struct conf *conf = isns->i_conf;
 869         struct isns_req *req;
 870         int res = 0;
 871         uint32_t error;
 872
 873         req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT);
 874         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 875         isns_req_add_str(req, 1, hostname);
 876         isns_req_add_delim(req);
 877         isns_req_add(req, 2, 0, NULL);
 878         res = isns_req_send(s, req);
 879         if (res < 0) {
 880                 log_warn("send(2) failed for %s", isns->i_addr);
 881                 goto quit;
 882         }
 883         res = isns_req_receive(s, req);
 884         if (res < 0) {
 885                 log_warn("receive(2) failed for %s", isns->i_addr);
 886                 goto quit;
 887         }
 888         error = isns_req_get_status(req);
 889         if (error != 0) {
 890                 log_warnx("iSNS check error %d for %s", error, isns->i_addr);
 891                 res = -1;
 892         }
 893 quit:
 894         isns_req_free(req);
 895         return (res);
 896 }
 897
 898 static int
 899 isns_do_deregister(struct isns *isns, int s, const char *hostname)
 900 {
 901         struct conf *conf = isns->i_conf;
 902         struct isns_req *req;
 903         int res = 0;
 904         uint32_t error;
 905
 906         req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT);
 907         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 908         isns_req_add_delim(req);
 909         isns_req_add_str(req, 1, hostname);
 910         res = isns_req_send(s, req);
 911         if (res < 0) {
 912                 log_warn("send(2) failed for %s", isns->i_addr);
 913                 goto quit;
 914         }
 915         res = isns_req_receive(s, req);
 916         if (res < 0) {
 917                 log_warn("receive(2) failed for %s", isns->i_addr);
 918                 goto quit;
 919         }
 920         error = isns_req_get_status(req);
 921         if (error != 0) {
 922                 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr);
 923                 res = -1;
 924         }
 925 quit:
 926         isns_req_free(req);
 927         return (res);
 928 }
 929
 930 void
 931 isns_register(struct isns *isns, struct isns *oldisns)
 932 {
 933         struct conf *conf = isns->i_conf;
 934         int error, s;
 935         char hostname[256];
 936
 937         if (TAILQ_EMPTY(&conf->conf_targets) ||
 938             TAILQ_EMPTY(&conf->conf_portal_groups))
 939                 return;
 940         set_timeout(conf->conf_isns_timeout, false);
 941         s = isns_do_connect(isns);
 942         if (s < 0) {
 943                 set_timeout(0, false);
 944                 return;
 945         }
 946         error = gethostname(hostname, sizeof(hostname));
 947         if (error != 0)
 948                 log_err(1, "gethostname");
 949
 950         if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets))
 951                 oldisns = isns;
 952         isns_do_deregister(oldisns, s, hostname);
 953         isns_do_register(isns, s, hostname);
 954         close(s);
 955         set_timeout(0, false);
 956 }
 957
 958 void
 959 isns_check(struct isns *isns)
 960 {
 961         struct conf *conf = isns->i_conf;
 962         int error, s, res;
 963         char hostname[256];
 964
 965         if (TAILQ_EMPTY(&conf->conf_targets) ||
 966             TAILQ_EMPTY(&conf->conf_portal_groups))
 967                 return;
 968         set_timeout(conf->conf_isns_timeout, false);
 969         s = isns_do_connect(isns);
 970         if (s < 0) {
 971                 set_timeout(0, false);
 972                 return;
 973         }
 974         error = gethostname(hostname, sizeof(hostname));
 975         if (error != 0)
 976                 log_err(1, "gethostname");
 977
 978         res = isns_do_check(isns, s, hostname);
 979         if (res < 0) {
 980                 isns_do_deregister(isns, s, hostname);
 981                 isns_do_register(isns, s, hostname);
 982         }
 983         close(s);
 984         set_timeout(0, false);
 985 }
 986
 987 void
 988 isns_deregister(struct isns *isns)
 989 {
 990         struct conf *conf = isns->i_conf;
 991         int error, s;
 992         char hostname[256];
 993
 994         if (TAILQ_EMPTY(&conf->conf_targets) ||
 995             TAILQ_EMPTY(&conf->conf_portal_groups))
 996                 return;
 997         set_timeout(conf->conf_isns_timeout, false);
 998         s = isns_do_connect(isns);
 999         if (s < 0)
1000                 return;
1001         error = gethostname(hostname, sizeof(hostname));
1002         if (error != 0)
1003                 log_err(1, "gethostname");
1004
1005         isns_do_deregister(isns, s, hostname);
1006         close(s);
1007         set_timeout(0, false);
1008 }
1009
1010 int
1011 portal_group_set_filter(struct portal_group *pg, const char *str)
1012 {
1013         int filter;
1014
1015         if (strcmp(str, "none") == 0) {
1016                 filter = PG_FILTER_NONE;
1017         } else if (strcmp(str, "portal") == 0) {
1018                 filter = PG_FILTER_PORTAL;
1019         } else if (strcmp(str, "portal-name") == 0) {
1020                 filter = PG_FILTER_PORTAL_NAME;
1021         } else if (strcmp(str, "portal-name-auth") == 0) {
1022                 filter = PG_FILTER_PORTAL_NAME_AUTH;
1023         } else {
1024                 log_warnx("invalid discovery-filter \"%s\" for portal-group "
1025                     "\"%s\"; valid values are \"none\", \"portal\", "
1026                     "\"portal-name\", and \"portal-name-auth\"",
1027                     str, pg->pg_name);
1028                 return (1);
1029         }
1030
1031         if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN &&
1032             pg->pg_discovery_filter != filter) {
1033                 log_warnx("cannot set discovery-filter to \"%s\" for "
1034                     "portal-group \"%s\"; already has a different "
1035                     "value", str, pg->pg_name);
1036                 return (1);
1037         }
1038
1039         pg->pg_discovery_filter = filter;
1040
1041         return (0);
1042 }
1043
1044 int
1045 portal_group_set_offload(struct portal_group *pg, const char *offload)
1046 {
1047
1048         if (pg->pg_offload != NULL) {
1049                 log_warnx("cannot set offload to \"%s\" for "
1050                     "portal-group \"%s\"; already defined",
1051                     offload, pg->pg_name);
1052                 return (1);
1053         }
1054
1055         pg->pg_offload = checked_strdup(offload);
1056
1057         return (0);
1058 }
1059
1060 int
1061 portal_group_set_redirection(struct portal_group *pg, const char *addr)
1062 {
1063
1064         if (pg->pg_redirection != NULL) {
1065                 log_warnx("cannot set redirection to \"%s\" for "
1066                     "portal-group \"%s\"; already defined",
1067                     addr, pg->pg_name);
1068                 return (1);
1069         }
1070
1071         pg->pg_redirection = checked_strdup(addr);
1072
1073         return (0);
1074 }
1075
1076 static bool
1077 valid_hex(const char ch)
1078 {
1079         switch (ch) {
1080         case '0':
1081         case '1':
1082         case '2':
1083         case '3':
1084         case '4':
1085         case '5':
1086         case '6':
1087         case '7':
1088         case '8':
1089         case '9':
1090         case 'a':
1091         case 'A':
1092         case 'b':
1093         case 'B':
1094         case 'c':
1095         case 'C':
1096         case 'd':
1097         case 'D':
1098         case 'e':
1099         case 'E':
1100         case 'f':
1101         case 'F':
1102                 return (true);
1103         default:
1104                 return (false);
1105         }
1106 }
1107
1108 bool
1109 valid_iscsi_name(const char *name)
1110 {
1111         int i;
1112
1113         if (strlen(name) >= MAX_NAME_LEN) {
1114                 log_warnx("overlong name for target \"%s\"; max length allowed "
1115                     "by iSCSI specification is %d characters",
1116                     name, MAX_NAME_LEN);
1117                 return (false);
1118         }
1119
1120         /*
1121          * In the cases below, we don't return an error, just in case the admin
1122          * was right, and we're wrong.
1123          */
1124         if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) {
1125                 for (i = strlen("iqn."); name[i] != '\0'; i++) {
1126                         /*
1127                          * XXX: We should verify UTF-8 normalisation, as defined
1128                          *      by 3.2.6.2: iSCSI Name Encoding.
1129                          */
1130                         if (isalnum(name[i]))
1131                                 continue;
1132                         if (name[i] == '-' || name[i] == '.' || name[i] == ':')
1133                                 continue;
1134                         log_warnx("invalid character \"%c\" in target name "
1135                             "\"%s\"; allowed characters are letters, digits, "
1136                             "'-', '.', and ':'", name[i], name);
1137                         break;
1138                 }
1139                 /*
1140                  * XXX: Check more stuff: valid date and a valid reversed domain.
1141                  */
1142         } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) {
1143                 if (strlen(name) != strlen("eui.") + 16)
1144                         log_warnx("invalid target name \"%s\"; the \"eui.\" "
1145                             "should be followed by exactly 16 hexadecimal "
1146                             "digits", name);
1147                 for (i = strlen("eui."); name[i] != '\0'; i++) {
1148                         if (!valid_hex(name[i])) {
1149                                 log_warnx("invalid character \"%c\" in target "
1150                                     "name \"%s\"; allowed characters are 1-9 "
1151                                     "and A-F", name[i], name);
1152                                 break;
1153                         }
1154                 }
1155         } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) {
1156                 if (strlen(name) > strlen("naa.") + 32)
1157                         log_warnx("invalid target name \"%s\"; the \"naa.\" "
1158                             "should be followed by at most 32 hexadecimal "
1159                             "digits", name);
1160                 for (i = strlen("naa."); name[i] != '\0'; i++) {
1161                         if (!valid_hex(name[i])) {
1162                                 log_warnx("invalid character \"%c\" in target "
1163                                     "name \"%s\"; allowed characters are 1-9 "
1164                                     "and A-F", name[i], name);
1165                                 break;
1166                         }
1167                 }
1168         } else {
1169                 log_warnx("invalid target name \"%s\"; should start with "
1170                     "either \"iqn.\", \"eui.\", or \"naa.\"",
1171                     name);
1172         }
1173         return (true);
1174 }
1175
1176 struct pport *
1177 pport_new(struct conf *conf, const char *name, uint32_t ctl_port)
1178 {
1179         struct pport *pp;
1180
1181         pp = calloc(1, sizeof(*pp));
1182         if (pp == NULL)
1183                 log_err(1, "calloc");
1184         pp->pp_conf = conf;
1185         pp->pp_name = checked_strdup(name);
1186         pp->pp_ctl_port = ctl_port;
1187         TAILQ_INIT(&pp->pp_ports);
1188         TAILQ_INSERT_TAIL(&conf->conf_pports, pp, pp_next);
1189         return (pp);
1190 }
1191
1192 struct pport *
1193 pport_find(const struct conf *conf, const char *name)
1194 {
1195         struct pport *pp;
1196
1197         TAILQ_FOREACH(pp, &conf->conf_pports, pp_next) {
1198                 if (strcasecmp(pp->pp_name, name) == 0)
1199                         return (pp);
1200         }
1201         return (NULL);
1202 }
1203
1204 struct pport *
1205 pport_copy(struct pport *pp, struct conf *conf)
1206 {
1207         struct pport *ppnew;
1208
1209         ppnew = pport_new(conf, pp->pp_name, pp->pp_ctl_port);
1210         return (ppnew);
1211 }
1212
1213 void
1214 pport_delete(struct pport *pp)
1215 {
1216         struct port *port, *tport;
1217
1218         TAILQ_FOREACH_SAFE(port, &pp->pp_ports, p_ts, tport)
1219                 port_delete(port);
1220         TAILQ_REMOVE(&pp->pp_conf->conf_pports, pp, pp_next);
1221         free(pp->pp_name);
1222         free(pp);
1223 }
1224
1225 struct port *
1226 port_new(struct conf *conf, struct target *target, struct portal_group *pg)
1227 {
1228         struct port *port;
1229         char *name;
1230         int ret;
1231
1232         ret = asprintf(&name, "%s-%s", pg->pg_name, target->t_name);
1233         if (ret <= 0)
1234                 log_err(1, "asprintf");
1235         if (port_find(conf, name) != NULL) {
1236                 log_warnx("duplicate port \"%s\"", name);
1237                 free(name);
1238                 return (NULL);
1239         }
1240         port = calloc(1, sizeof(*port));
1241         if (port == NULL)
1242                 log_err(1, "calloc");
1243         port->p_conf = conf;
1244         port->p_name = name;
1245         port->p_ioctl_port = 0;
1246         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1247         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1248         port->p_target = target;
1249         TAILQ_INSERT_TAIL(&pg->pg_ports, port, p_pgs);
1250         port->p_portal_group = pg;
1251         return (port);
1252 }
1253
1254 struct port *
1255 port_new_ioctl(struct conf *conf, struct target *target, int pp, int vp)
1256 {
1257         struct pport *pport;
1258         struct port *port;
1259         char *pname;
1260         char *name;
1261         int ret;
1262
1263         ret = asprintf(&pname, "ioctl/%d/%d", pp, vp);
1264         if (ret <= 0) {
1265                 log_err(1, "asprintf");
1266                 return (NULL);
1267         }
1268
1269         pport = pport_find(conf, pname);
1270         if (pport != NULL) {
1271                 free(pname);
1272                 return (port_new_pp(conf, target, pport));
1273         }
1274
1275         ret = asprintf(&name, "%s-%s", pname, target->t_name);
1276         free(pname);
1277
1278         if (ret <= 0)
1279                 log_err(1, "asprintf");
1280         if (port_find(conf, name) != NULL) {
1281                 log_warnx("duplicate port \"%s\"", name);
1282                 free(name);
1283                 return (NULL);
1284         }
1285         port = calloc(1, sizeof(*port));
1286         if (port == NULL)
1287                 log_err(1, "calloc");
1288         port->p_conf = conf;
1289         port->p_name = name;
1290         port->p_ioctl_port = 1;
1291         port->p_ioctl_pp = pp;
1292         port->p_ioctl_vp = vp;
1293         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1294         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1295         port->p_target = target;
1296         return (port);
1297 }
1298
1299 struct port *
1300 port_new_pp(struct conf *conf, struct target *target, struct pport *pp)
1301 {
1302         struct port *port;
1303         char *name;
1304         int ret;
1305
1306         ret = asprintf(&name, "%s-%s", pp->pp_name, target->t_name);
1307         if (ret <= 0)
1308                 log_err(1, "asprintf");
1309         if (port_find(conf, name) != NULL) {
1310                 log_warnx("duplicate port \"%s\"", name);
1311                 free(name);
1312                 return (NULL);
1313         }
1314         port = calloc(1, sizeof(*port));
1315         if (port == NULL)
1316                 log_err(1, "calloc");
1317         port->p_conf = conf;
1318         port->p_name = name;
1319         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1320         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1321         port->p_target = target;
1322         TAILQ_INSERT_TAIL(&pp->pp_ports, port, p_pps);
1323         port->p_pport = pp;
1324         return (port);
1325 }
1326
1327 struct port *
1328 port_find(const struct conf *conf, const char *name)
1329 {
1330         struct port *port;
1331
1332         TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1333                 if (strcasecmp(port->p_name, name) == 0)
1334                         return (port);
1335         }
1336
1337         return (NULL);
1338 }
1339
1340 struct port *
1341 port_find_in_pg(const struct portal_group *pg, const char *target)
1342 {
1343         struct port *port;
1344
1345         TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) {
1346                 if (strcasecmp(port->p_target->t_name, target) == 0)
1347                         return (port);
1348         }
1349
1350         return (NULL);
1351 }
1352
1353 void
1354 port_delete(struct port *port)
1355 {
1356
1357         if (port->p_portal_group)
1358                 TAILQ_REMOVE(&port->p_portal_group->pg_ports, port, p_pgs);
1359         if (port->p_pport)
1360                 TAILQ_REMOVE(&port->p_pport->pp_ports, port, p_pps);
1361         if (port->p_target)
1362                 TAILQ_REMOVE(&port->p_target->t_ports, port, p_ts);
1363         TAILQ_REMOVE(&port->p_conf->conf_ports, port, p_next);
1364         free(port->p_name);
1365         free(port);
1366 }
1367
1368 int
1369 port_is_dummy(struct port *port)
1370 {
1371
1372         if (port->p_portal_group) {
1373                 if (port->p_portal_group->pg_foreign)
1374                         return (1);
1375                 if (TAILQ_EMPTY(&port->p_portal_group->pg_portals))
1376                         return (1);
1377         }
1378         return (0);
1379 }
1380
1381 struct target *
1382 target_new(struct conf *conf, const char *name)
1383 {
1384         struct target *targ;
1385         int i, len;
1386
1387         targ = target_find(conf, name);
1388         if (targ != NULL) {
1389                 log_warnx("duplicated target \"%s\"", name);
1390                 return (NULL);
1391         }
1392         if (valid_iscsi_name(name) == false) {
1393                 log_warnx("target name \"%s\" is invalid", name);
1394                 return (NULL);
1395         }
1396         targ = calloc(1, sizeof(*targ));
1397         if (targ == NULL)
1398                 log_err(1, "calloc");
1399         targ->t_name = checked_strdup(name);
1400
1401         /*
1402          * RFC 3722 requires us to normalize the name to lowercase.
1403          */
1404         len = strlen(name);
1405         for (i = 0; i < len; i++)
1406                 targ->t_name[i] = tolower(targ->t_name[i]);
1407
1408         targ->t_conf = conf;
1409         TAILQ_INIT(&targ->t_ports);
1410         TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next);
1411
1412         return (targ);
1413 }
1414
1415 void
1416 target_delete(struct target *targ)
1417 {
1418         struct port *port, *tport;
1419
1420         TAILQ_FOREACH_SAFE(port, &targ->t_ports, p_ts, tport)
1421                 port_delete(port);
1422         TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next);
1423
1424         free(targ->t_name);
1425         free(targ->t_redirection);
1426         free(targ);
1427 }
1428
1429 struct target *
1430 target_find(struct conf *conf, const char *name)
1431 {
1432         struct target *targ;
1433
1434         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1435                 if (strcasecmp(targ->t_name, name) == 0)
1436                         return (targ);
1437         }
1438
1439         return (NULL);
1440 }
1441
1442 int
1443 target_set_redirection(struct target *target, const char *addr)
1444 {
1445
1446         if (target->t_redirection != NULL) {
1447                 log_warnx("cannot set redirection to \"%s\" for "
1448                     "target \"%s\"; already defined",
1449                     addr, target->t_name);
1450                 return (1);
1451         }
1452
1453         target->t_redirection = checked_strdup(addr);
1454
1455         return (0);
1456 }
1457
1458 struct lun *
1459 lun_new(struct conf *conf, const char *name)
1460 {
1461         struct lun *lun;
1462
1463         lun = lun_find(conf, name);
1464         if (lun != NULL) {
1465                 log_warnx("duplicated lun \"%s\"", name);
1466                 return (NULL);
1467         }
1468
1469         lun = calloc(1, sizeof(*lun));
1470         if (lun == NULL)
1471                 log_err(1, "calloc");
1472         lun->l_conf = conf;
1473         lun->l_name = checked_strdup(name);
1474         TAILQ_INIT(&lun->l_options);
1475         TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next);
1476         lun->l_ctl_lun = -1;
1477
1478         return (lun);
1479 }
1480
1481 void
1482 lun_delete(struct lun *lun)
1483 {
1484         struct target *targ;
1485         struct option *o, *tmp;
1486         int i;
1487
1488         TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) {
1489                 for (i = 0; i < MAX_LUNS; i++) {
1490                         if (targ->t_luns[i] == lun)
1491                                 targ->t_luns[i] = NULL;
1492                 }
1493         }
1494         TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next);
1495
1496         TAILQ_FOREACH_SAFE(o, &lun->l_options, o_next, tmp)
1497                 option_delete(&lun->l_options, o);
1498         free(lun->l_name);
1499         free(lun->l_backend);
1500         free(lun->l_device_id);
1501         free(lun->l_path);
1502         free(lun->l_scsiname);
1503         free(lun->l_serial);
1504         free(lun);
1505 }
1506
1507 struct lun *
1508 lun_find(const struct conf *conf, const char *name)
1509 {
1510         struct lun *lun;
1511
1512         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1513                 if (strcmp(lun->l_name, name) == 0)
1514                         return (lun);
1515         }
1516
1517         return (NULL);
1518 }
1519
1520 void
1521 lun_set_backend(struct lun *lun, const char *value)
1522 {
1523         free(lun->l_backend);
1524         lun->l_backend = checked_strdup(value);
1525 }
1526
1527 void
1528 lun_set_blocksize(struct lun *lun, size_t value)
1529 {
1530
1531         lun->l_blocksize = value;
1532 }
1533
1534 void
1535 lun_set_device_type(struct lun *lun, uint8_t value)
1536 {
1537
1538         lun->l_device_type = value;
1539 }
1540
1541 void
1542 lun_set_device_id(struct lun *lun, const char *value)
1543 {
1544         free(lun->l_device_id);
1545         lun->l_device_id = checked_strdup(value);
1546 }
1547
1548 void
1549 lun_set_path(struct lun *lun, const char *value)
1550 {
1551         free(lun->l_path);
1552         lun->l_path = checked_strdup(value);
1553 }
1554
1555 void
1556 lun_set_scsiname(struct lun *lun, const char *value)
1557 {
1558         free(lun->l_scsiname);
1559         lun->l_scsiname = checked_strdup(value);
1560 }
1561
1562 void
1563 lun_set_serial(struct lun *lun, const char *value)
1564 {
1565         free(lun->l_serial);
1566         lun->l_serial = checked_strdup(value);
1567 }
1568
1569 void
1570 lun_set_size(struct lun *lun, size_t value)
1571 {
1572
1573         lun->l_size = value;
1574 }
1575
1576 void
1577 lun_set_ctl_lun(struct lun *lun, uint32_t value)
1578 {
1579
1580         lun->l_ctl_lun = value;
1581 }
1582
1583 struct option *
1584 option_new(struct options *options, const char *name, const char *value)
1585 {
1586         struct option *o;
1587
1588         o = option_find(options, name);
1589         if (o != NULL) {
1590                 log_warnx("duplicated option \"%s\"", name);
1591                 return (NULL);
1592         }
1593
1594         o = calloc(1, sizeof(*o));
1595         if (o == NULL)
1596                 log_err(1, "calloc");
1597         o->o_name = checked_strdup(name);
1598         o->o_value = checked_strdup(value);
1599         TAILQ_INSERT_TAIL(options, o, o_next);
1600
1601         return (o);
1602 }
1603
1604 void
1605 option_delete(struct options *options, struct option *o)
1606 {
1607
1608         TAILQ_REMOVE(options, o, o_next);
1609         free(o->o_name);
1610         free(o->o_value);
1611         free(o);
1612 }
1613
1614 struct option *
1615 option_find(const struct options *options, const char *name)
1616 {
1617         struct option *o;
1618
1619         TAILQ_FOREACH(o, options, o_next) {
1620                 if (strcmp(o->o_name, name) == 0)
1621                         return (o);
1622         }
1623
1624         return (NULL);
1625 }
1626
1627 void
1628 option_set(struct option *o, const char *value)
1629 {
1630
1631         free(o->o_value);
1632         o->o_value = checked_strdup(value);
1633 }
1634
1635 static struct connection *
1636 connection_new(struct portal *portal, int fd, const char *host,
1637     const struct sockaddr *client_sa)
1638 {
1639         struct connection *conn;
1640
1641         conn = calloc(1, sizeof(*conn));
1642         if (conn == NULL)
1643                 log_err(1, "calloc");
1644         conn->conn_portal = portal;
1645         conn->conn_socket = fd;
1646         conn->conn_initiator_addr = checked_strdup(host);
1647         memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len);
1648
1649         /*
1650          * Default values, from RFC 3720, section 12.
1651          */
1652         conn->conn_max_recv_data_segment_length = 8192;
1653         conn->conn_max_send_data_segment_length = 8192;
1654         conn->conn_max_burst_length = 262144;
1655         conn->conn_first_burst_length = 65536;
1656         conn->conn_immediate_data = true;
1657
1658         return (conn);
1659 }
1660
1661 #if 0
1662 static void
1663 conf_print(struct conf *conf)
1664 {
1665         struct auth_group *ag;
1666         struct auth *auth;
1667         struct auth_name *auth_name;
1668         struct auth_portal *auth_portal;
1669         struct portal_group *pg;
1670         struct portal *portal;
1671         struct target *targ;
1672         struct lun *lun;
1673         struct option *o;
1674
1675         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1676                 fprintf(stderr, "auth-group %s {\n", ag->ag_name);
1677                 TAILQ_FOREACH(auth, &ag->ag_auths, a_next)
1678                         fprintf(stderr, "\t chap-mutual %s %s %s %s\n",
1679                             auth->a_user, auth->a_secret,
1680                             auth->a_mutual_user, auth->a_mutual_secret);
1681                 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next)
1682                         fprintf(stderr, "\t initiator-name %s\n",
1683                             auth_name->an_initator_name);
1684                 TAILQ_FOREACH(auth_portal, &ag->ag_portals, ap_next)
1685                         fprintf(stderr, "\t initiator-portal %s\n",
1686                             auth_portal->ap_initator_portal);
1687                 fprintf(stderr, "}\n");
1688         }
1689         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1690                 fprintf(stderr, "portal-group %s {\n", pg->pg_name);
1691                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
1692                         fprintf(stderr, "\t listen %s\n", portal->p_listen);
1693                 fprintf(stderr, "}\n");
1694         }
1695         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1696                 fprintf(stderr, "\tlun %s {\n", lun->l_name);
1697                 fprintf(stderr, "\t\tpath %s\n", lun->l_path);
1698                 TAILQ_FOREACH(o, &lun->l_options, o_next)
1699                         fprintf(stderr, "\t\toption %s %s\n",
1700                             o->o_name, o->o_value);
1701                 fprintf(stderr, "\t}\n");
1702         }
1703         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1704                 fprintf(stderr, "target %s {\n", targ->t_name);
1705                 if (targ->t_alias != NULL)
1706                         fprintf(stderr, "\t alias %s\n", targ->t_alias);
1707                 fprintf(stderr, "}\n");
1708         }
1709 }
1710 #endif
1711
1712 static int
1713 conf_verify_lun(struct lun *lun)
1714 {
1715         const struct lun *lun2;
1716
1717         if (lun->l_backend == NULL)
1718                 lun_set_backend(lun, "block");
1719         if (strcmp(lun->l_backend, "block") == 0) {
1720                 if (lun->l_path == NULL) {
1721                         log_warnx("missing path for lun \"%s\"",
1722                             lun->l_name);
1723                         return (1);
1724                 }
1725         } else if (strcmp(lun->l_backend, "ramdisk") == 0) {
1726                 if (lun->l_size == 0) {
1727                         log_warnx("missing size for ramdisk-backed lun \"%s\"",
1728                             lun->l_name);
1729                         return (1);
1730                 }
1731                 if (lun->l_path != NULL) {
1732                         log_warnx("path must not be specified "
1733                             "for ramdisk-backed lun \"%s\"",
1734                             lun->l_name);
1735                         return (1);
1736                 }
1737         }
1738         if (lun->l_blocksize == 0) {
1739                 if (lun->l_device_type == 5)
1740                         lun_set_blocksize(lun, DEFAULT_CD_BLOCKSIZE);
1741                 else
1742                         lun_set_blocksize(lun, DEFAULT_BLOCKSIZE);
1743         } else if (lun->l_blocksize < 0) {
1744                 log_warnx("invalid blocksize for lun \"%s\"; "
1745                     "must be larger than 0", lun->l_name);
1746                 return (1);
1747         }
1748         if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) {
1749                 log_warnx("invalid size for lun \"%s\"; "
1750                     "must be multiple of blocksize", lun->l_name);
1751                 return (1);
1752         }
1753         TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) {
1754                 if (lun == lun2)
1755                         continue;
1756                 if (lun->l_path != NULL && lun2->l_path != NULL &&
1757                     strcmp(lun->l_path, lun2->l_path) == 0) {
1758                         log_debugx("WARNING: path \"%s\" duplicated "
1759                             "between lun \"%s\", and "
1760                             "lun \"%s\"", lun->l_path,
1761                             lun->l_name, lun2->l_name);
1762                 }
1763         }
1764
1765         return (0);
1766 }
1767
1768 int
1769 conf_verify(struct conf *conf)
1770 {
1771         struct auth_group *ag;
1772         struct portal_group *pg;
1773         struct port *port;
1774         struct target *targ;
1775         struct lun *lun;
1776         bool found;
1777         int error, i;
1778
1779         if (conf->conf_pidfile_path == NULL)
1780                 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE);
1781
1782         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1783                 error = conf_verify_lun(lun);
1784                 if (error != 0)
1785                         return (error);
1786         }
1787         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1788                 if (targ->t_auth_group == NULL) {
1789                         targ->t_auth_group = auth_group_find(conf,
1790                             "default");
1791                         assert(targ->t_auth_group != NULL);
1792                 }
1793                 if (TAILQ_EMPTY(&targ->t_ports)) {
1794                         pg = portal_group_find(conf, "default");
1795                         assert(pg != NULL);
1796                         port_new(conf, targ, pg);
1797                 }
1798                 found = false;
1799                 for (i = 0; i < MAX_LUNS; i++) {
1800                         if (targ->t_luns[i] != NULL)
1801                                 found = true;
1802                 }
1803                 if (!found && targ->t_redirection == NULL) {
1804                         log_warnx("no LUNs defined for target \"%s\"",
1805                             targ->t_name);
1806                 }
1807                 if (found && targ->t_redirection != NULL) {
1808                         log_debugx("target \"%s\" contains luns, "
1809                             " but configured for redirection",
1810                             targ->t_name);
1811                 }
1812         }
1813         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1814                 assert(pg->pg_name != NULL);
1815                 if (pg->pg_discovery_auth_group == NULL) {
1816                         pg->pg_discovery_auth_group =
1817                             auth_group_find(conf, "default");
1818                         assert(pg->pg_discovery_auth_group != NULL);
1819                 }
1820
1821                 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN)
1822                         pg->pg_discovery_filter = PG_FILTER_NONE;
1823
1824                 if (pg->pg_redirection != NULL) {
1825                         if (!TAILQ_EMPTY(&pg->pg_ports)) {
1826                                 log_debugx("portal-group \"%s\" assigned "
1827                                     "to target, but configured "
1828                                     "for redirection",
1829                                     pg->pg_name);
1830                         }
1831                         pg->pg_unassigned = false;
1832                 } else if (!TAILQ_EMPTY(&pg->pg_ports)) {
1833                         pg->pg_unassigned = false;
1834                 } else {
1835                         if (strcmp(pg->pg_name, "default") != 0)
1836                                 log_warnx("portal-group \"%s\" not assigned "
1837                                     "to any target", pg->pg_name);
1838                         pg->pg_unassigned = true;
1839                 }
1840         }
1841         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1842                 if (ag->ag_name == NULL)
1843                         assert(ag->ag_target != NULL);
1844                 else
1845                         assert(ag->ag_target == NULL);
1846
1847                 found = false;
1848                 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1849                         if (targ->t_auth_group == ag) {
1850                                 found = true;
1851                                 break;
1852                         }
1853                 }
1854                 TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1855                         if (port->p_auth_group == ag) {
1856                                 found = true;
1857                                 break;
1858                         }
1859                 }
1860                 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1861                         if (pg->pg_discovery_auth_group == ag) {
1862                                 found = true;
1863                                 break;
1864                         }
1865                 }
1866                 if (!found && ag->ag_name != NULL &&
1867                     strcmp(ag->ag_name, "default") != 0 &&
1868                     strcmp(ag->ag_name, "no-authentication") != 0 &&
1869                     strcmp(ag->ag_name, "no-access") != 0) {
1870                         log_warnx("auth-group \"%s\" not assigned "
1871                             "to any target", ag->ag_name);
1872                 }
1873         }
1874
1875         return (0);
1876 }
1877
1878 static int
1879 conf_apply(struct conf *oldconf, struct conf *newconf)
1880 {
1881         struct lun *oldlun, *newlun, *tmplun;
1882         struct portal_group *oldpg, *newpg;
1883         struct portal *oldp, *newp;
1884         struct port *oldport, *newport, *tmpport;
1885         struct isns *oldns, *newns;
1886         pid_t otherpid;
1887         int changed, cumulated_error = 0, error, sockbuf;
1888         int one = 1;
1889
1890         if (oldconf->conf_debug != newconf->conf_debug) {
1891                 log_debugx("changing debug level to %d", newconf->conf_debug);
1892                 log_init(newconf->conf_debug);
1893         }
1894
1895         if (oldconf->conf_pidfh != NULL) {
1896                 assert(oldconf->conf_pidfile_path != NULL);
1897                 if (newconf->conf_pidfile_path != NULL &&
1898                     strcmp(oldconf->conf_pidfile_path,
1899                     newconf->conf_pidfile_path) == 0) {
1900                         newconf->conf_pidfh = oldconf->conf_pidfh;
1901                         oldconf->conf_pidfh = NULL;
1902                 } else {
1903                         log_debugx("removing pidfile %s",
1904                             oldconf->conf_pidfile_path);
1905                         pidfile_remove(oldconf->conf_pidfh);
1906                         oldconf->conf_pidfh = NULL;
1907                 }
1908         }
1909
1910         if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) {
1911                 log_debugx("opening pidfile %s", newconf->conf_pidfile_path);
1912                 newconf->conf_pidfh =
1913                     pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid);
1914                 if (newconf->conf_pidfh == NULL) {
1915                         if (errno == EEXIST)
1916                                 log_errx(1, "daemon already running, pid: %jd.",
1917                                     (intmax_t)otherpid);
1918                         log_err(1, "cannot open or create pidfile \"%s\"",
1919                             newconf->conf_pidfile_path);
1920                 }
1921         }
1922
1923         /*
1924          * Go through the new portal groups, assigning tags or preserving old.
1925          */
1926         TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
1927                 if (newpg->pg_tag != 0)
1928                         continue;
1929                 oldpg = portal_group_find(oldconf, newpg->pg_name);
1930                 if (oldpg != NULL)
1931                         newpg->pg_tag = oldpg->pg_tag;
1932                 else
1933                         newpg->pg_tag = ++last_portal_group_tag;
1934         }
1935
1936         /* Deregister on removed iSNS servers. */
1937         TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
1938                 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
1939                         if (strcmp(oldns->i_addr, newns->i_addr) == 0)
1940                                 break;
1941                 }
1942                 if (newns == NULL)
1943                         isns_deregister(oldns);
1944         }
1945
1946         /*
1947          * XXX: If target or lun removal fails, we should somehow "move"
1948          *      the old lun or target into newconf, so that subsequent
1949          *      conf_apply() would try to remove them again.  That would
1950          *      be somewhat hairy, though, and lun deletion failures don't
1951          *      really happen, so leave it as it is for now.
1952          */
1953         /*
1954          * First, remove any ports present in the old configuration
1955          * and missing in the new one.
1956          */
1957         TAILQ_FOREACH_SAFE(oldport, &oldconf->conf_ports, p_next, tmpport) {
1958                 if (port_is_dummy(oldport))
1959                         continue;
1960                 newport = port_find(newconf, oldport->p_name);
1961                 if (newport != NULL && !port_is_dummy(newport))
1962                         continue;
1963                 log_debugx("removing port \"%s\"", oldport->p_name);
1964                 error = kernel_port_remove(oldport);
1965                 if (error != 0) {
1966                         log_warnx("failed to remove port %s",
1967                             oldport->p_name);
1968                         /*
1969                          * XXX: Uncomment after fixing the root cause.
1970                          *
1971                          * cumulated_error++;
1972                          */
1973                 }
1974         }
1975
1976         /*
1977          * Second, remove any LUNs present in the old configuration
1978          * and missing in the new one.
1979          */
1980         TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) {
1981                 newlun = lun_find(newconf, oldlun->l_name);
1982                 if (newlun == NULL) {
1983                         log_debugx("lun \"%s\", CTL lun %d "
1984                             "not found in new configuration; "
1985                             "removing", oldlun->l_name, oldlun->l_ctl_lun);
1986                         error = kernel_lun_remove(oldlun);
1987                         if (error != 0) {
1988                                 log_warnx("failed to remove lun \"%s\", "
1989                                     "CTL lun %d",
1990                                     oldlun->l_name, oldlun->l_ctl_lun);
1991                                 cumulated_error++;
1992                         }
1993                         continue;
1994                 }
1995
1996                 /*
1997                  * Also remove the LUNs changed by more than size.
1998                  */
1999                 changed = 0;
2000                 assert(oldlun->l_backend != NULL);
2001                 assert(newlun->l_backend != NULL);
2002                 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) {
2003                         log_debugx("backend for lun \"%s\", "
2004                             "CTL lun %d changed; removing",
2005                             oldlun->l_name, oldlun->l_ctl_lun);
2006                         changed = 1;
2007                 }
2008                 if (oldlun->l_blocksize != newlun->l_blocksize) {
2009                         log_debugx("blocksize for lun \"%s\", "
2010                             "CTL lun %d changed; removing",
2011                             oldlun->l_name, oldlun->l_ctl_lun);
2012                         changed = 1;
2013                 }
2014                 if (newlun->l_device_id != NULL &&
2015                     (oldlun->l_device_id == NULL ||
2016                      strcmp(oldlun->l_device_id, newlun->l_device_id) !=
2017                      0)) {
2018                         log_debugx("device-id for lun \"%s\", "
2019                             "CTL lun %d changed; removing",
2020                             oldlun->l_name, oldlun->l_ctl_lun);
2021                         changed = 1;
2022                 }
2023                 if (newlun->l_path != NULL &&
2024                     (oldlun->l_path == NULL ||
2025                      strcmp(oldlun->l_path, newlun->l_path) != 0)) {
2026                         log_debugx("path for lun \"%s\", "
2027                             "CTL lun %d, changed; removing",
2028                             oldlun->l_name, oldlun->l_ctl_lun);
2029                         changed = 1;
2030                 }
2031                 if (newlun->l_serial != NULL &&
2032                     (oldlun->l_serial == NULL ||
2033                      strcmp(oldlun->l_serial, newlun->l_serial) != 0)) {
2034                         log_debugx("serial for lun \"%s\", "
2035                             "CTL lun %d changed; removing",
2036                             oldlun->l_name, oldlun->l_ctl_lun);
2037                         changed = 1;
2038                 }
2039                 if (changed) {
2040                         error = kernel_lun_remove(oldlun);
2041                         if (error != 0) {
2042                                 log_warnx("failed to remove lun \"%s\", "
2043                                     "CTL lun %d",
2044                                     oldlun->l_name, oldlun->l_ctl_lun);
2045                                 cumulated_error++;
2046                         }
2047                         lun_delete(oldlun);
2048                         continue;
2049                 }
2050
2051                 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun);
2052         }
2053
2054         TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) {
2055                 oldlun = lun_find(oldconf, newlun->l_name);
2056                 if (oldlun != NULL) {
2057                         log_debugx("modifying lun \"%s\", CTL lun %d",
2058                             newlun->l_name, newlun->l_ctl_lun);
2059                         error = kernel_lun_modify(newlun);
2060                         if (error != 0) {
2061                                 log_warnx("failed to "
2062                                     "modify lun \"%s\", CTL lun %d",
2063                                     newlun->l_name, newlun->l_ctl_lun);
2064                                 cumulated_error++;
2065                         }
2066                         continue;
2067                 }
2068                 log_debugx("adding lun \"%s\"", newlun->l_name);
2069                 error = kernel_lun_add(newlun);
2070                 if (error != 0) {
2071                         log_warnx("failed to add lun \"%s\"", newlun->l_name);
2072                         lun_delete(newlun);
2073                         cumulated_error++;
2074                 }
2075         }
2076
2077         /*
2078          * Now add new ports or modify existing ones.
2079          */
2080         TAILQ_FOREACH(newport, &newconf->conf_ports, p_next) {
2081                 if (port_is_dummy(newport))
2082                         continue;
2083                 oldport = port_find(oldconf, newport->p_name);
2084
2085                 if (oldport == NULL || port_is_dummy(oldport)) {
2086                         log_debugx("adding port \"%s\"", newport->p_name);
2087                         error = kernel_port_add(newport);
2088                 } else {
2089                         log_debugx("updating port \"%s\"", newport->p_name);
2090                         newport->p_ctl_port = oldport->p_ctl_port;
2091                         error = kernel_port_update(newport, oldport);
2092                 }
2093                 if (error != 0) {
2094                         log_warnx("failed to %s port %s",
2095                             (oldport == NULL) ? "add" : "update",
2096                             newport->p_name);
2097                         /*
2098                          * XXX: Uncomment after fixing the root cause.
2099                          *
2100                          * cumulated_error++;
2101                          */
2102                 }
2103         }
2104
2105         /*
2106          * Go through the new portals, opening the sockets as necessary.
2107          */
2108         TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
2109                 if (newpg->pg_foreign)
2110                         continue;
2111                 if (newpg->pg_unassigned) {
2112                         log_debugx("not listening on portal-group \"%s\", "
2113                             "not assigned to any target",
2114                             newpg->pg_name);
2115                         continue;
2116                 }
2117                 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) {
2118                         /*
2119                          * Try to find already open portal and reuse
2120                          * the listening socket.  We don't care about
2121                          * what portal or portal group that was, what
2122                          * matters is the listening address.
2123                          */
2124                         TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups,
2125                             pg_next) {
2126                                 TAILQ_FOREACH(oldp, &oldpg->pg_portals,
2127                                     p_next) {
2128                                         if (strcmp(newp->p_listen,
2129                                             oldp->p_listen) == 0 &&
2130                                             oldp->p_socket > 0) {
2131                                                 newp->p_socket =
2132                                                     oldp->p_socket;
2133                                                 oldp->p_socket = 0;
2134                                                 break;
2135                                         }
2136                                 }
2137                         }
2138                         if (newp->p_socket > 0) {
2139                                 /*
2140                                  * We're done with this portal.
2141                                  */
2142                                 continue;
2143                         }
2144
2145 #ifdef ICL_KERNEL_PROXY
2146                         if (proxy_mode) {
2147                                 newpg->pg_conf->conf_portal_id++;
2148                                 newp->p_id = newpg->pg_conf->conf_portal_id;
2149                                 log_debugx("listening on %s, portal-group "
2150                                     "\"%s\", portal id %d, using ICL proxy",
2151                                     newp->p_listen, newpg->pg_name, newp->p_id);
2152                                 kernel_listen(newp->p_ai, newp->p_iser,
2153                                     newp->p_id);
2154                                 continue;
2155                         }
2156 #endif
2157                         assert(proxy_mode == false);
2158                         assert(newp->p_iser == false);
2159
2160                         log_debugx("listening on %s, portal-group \"%s\"",
2161                             newp->p_listen, newpg->pg_name);
2162                         newp->p_socket = socket(newp->p_ai->ai_family,
2163                             newp->p_ai->ai_socktype,
2164                             newp->p_ai->ai_protocol);
2165                         if (newp->p_socket < 0) {
2166                                 log_warn("socket(2) failed for %s",
2167                                     newp->p_listen);
2168                                 cumulated_error++;
2169                                 continue;
2170                         }
2171                         sockbuf = SOCKBUF_SIZE;
2172                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF,
2173                             &sockbuf, sizeof(sockbuf)) == -1)
2174                                 log_warn("setsockopt(SO_RCVBUF) failed "
2175                                     "for %s", newp->p_listen);
2176                         sockbuf = SOCKBUF_SIZE;
2177                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF,
2178                             &sockbuf, sizeof(sockbuf)) == -1)
2179                                 log_warn("setsockopt(SO_SNDBUF) failed "
2180                                     "for %s", newp->p_listen);
2181                         error = setsockopt(newp->p_socket, SOL_SOCKET,
2182                             SO_REUSEADDR, &one, sizeof(one));
2183                         if (error != 0) {
2184                                 log_warn("setsockopt(SO_REUSEADDR) failed "
2185                                     "for %s", newp->p_listen);
2186                                 close(newp->p_socket);
2187                                 newp->p_socket = 0;
2188                                 cumulated_error++;
2189                                 continue;
2190                         }
2191                         if (newpg->pg_dscp != -1) {
2192                                 struct sockaddr sa;
2193                                 int len = sizeof(sa);
2194                                 getsockname(newp->p_socket, &sa, &len);
2195                                 /*
2196                                  * Only allow the 6-bit DSCP
2197                                  * field to be modified
2198                                  */
2199                                 int tos = newpg->pg_dscp << 2;
2200                                 if (sa.sa_family == AF_INET) {
2201                                         if (setsockopt(newp->p_socket,
2202                                             IPPROTO_IP, IP_TOS,
2203                                             &tos, sizeof(tos)) == -1)
2204                                                 log_warn("setsockopt(IP_TOS) "
2205                                                     "failed for %s",
2206                                                     newp->p_listen);
2207                                 } else
2208                                 if (sa.sa_family == AF_INET6) {
2209                                         if (setsockopt(newp->p_socket,
2210                                             IPPROTO_IPV6, IPV6_TCLASS,
2211                                             &tos, sizeof(tos)) == -1)
2212                                                 log_warn("setsockopt(IPV6_TCLASS) "
2213                                                     "failed for %s",
2214                                                     newp->p_listen);
2215                                 }
2216                         }
2217                         error = bind(newp->p_socket, newp->p_ai->ai_addr,
2218                             newp->p_ai->ai_addrlen);
2219                         if (error != 0) {
2220                                 log_warn("bind(2) failed for %s",
2221                                     newp->p_listen);
2222                                 close(newp->p_socket);
2223                                 newp->p_socket = 0;
2224                                 cumulated_error++;
2225                                 continue;
2226                         }
2227                         error = listen(newp->p_socket, -1);
2228                         if (error != 0) {
2229                                 log_warn("listen(2) failed for %s",
2230                                     newp->p_listen);
2231                                 close(newp->p_socket);
2232                                 newp->p_socket = 0;
2233                                 cumulated_error++;
2234                                 continue;
2235                         }
2236                 }
2237         }
2238
2239         /*
2240          * Go through the no longer used sockets, closing them.
2241          */
2242         TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) {
2243                 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) {
2244                         if (oldp->p_socket <= 0)
2245                                 continue;
2246                         log_debugx("closing socket for %s, portal-group \"%s\"",
2247                             oldp->p_listen, oldpg->pg_name);
2248                         close(oldp->p_socket);
2249                         oldp->p_socket = 0;
2250                 }
2251         }
2252
2253         /* (Re-)Register on remaining/new iSNS servers. */
2254         TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
2255                 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
2256                         if (strcmp(oldns->i_addr, newns->i_addr) == 0)
2257                                 break;
2258                 }
2259                 isns_register(newns, oldns);
2260         }
2261
2262         /* Schedule iSNS update */
2263         if (!TAILQ_EMPTY(&newconf->conf_isns))
2264                 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2265
2266         return (cumulated_error);
2267 }
2268
2269 bool
2270 timed_out(void)
2271 {
2272
2273         return (sigalrm_received);
2274 }
2275
2276 static void
2277 sigalrm_handler_fatal(int dummy __unused)
2278 {
2279         /*
2280          * It would be easiest to just log an error and exit.  We can't
2281          * do this, though, because log_errx() is not signal safe, since
2282          * it calls syslog(3).  Instead, set a flag checked by pdu_send()
2283          * and pdu_receive(), to call log_errx() there.  Should they fail
2284          * to notice, we'll exit here one second later.
2285          */
2286         if (sigalrm_received) {
2287                 /*
2288                  * Oh well.  Just give up and quit.
2289                  */
2290                 _exit(2);
2291         }
2292
2293         sigalrm_received = true;
2294 }
2295
2296 static void
2297 sigalrm_handler(int dummy __unused)
2298 {
2299
2300         sigalrm_received = true;
2301 }
2302
2303 void
2304 set_timeout(int timeout, int fatal)
2305 {
2306         struct sigaction sa;
2307         struct itimerval itv;
2308         int error;
2309
2310         if (timeout <= 0) {
2311                 log_debugx("session timeout disabled");
2312                 bzero(&itv, sizeof(itv));
2313                 error = setitimer(ITIMER_REAL, &itv, NULL);
2314                 if (error != 0)
2315                         log_err(1, "setitimer");
2316                 sigalrm_received = false;
2317                 return;
2318         }
2319
2320         sigalrm_received = false;
2321         bzero(&sa, sizeof(sa));
2322         if (fatal)
2323                 sa.sa_handler = sigalrm_handler_fatal;
2324         else
2325                 sa.sa_handler = sigalrm_handler;
2326         sigfillset(&sa.sa_mask);
2327         error = sigaction(SIGALRM, &sa, NULL);
2328         if (error != 0)
2329                 log_err(1, "sigaction");
2330
2331         /*
2332          * First SIGALRM will arive after conf_timeout seconds.
2333          * If we do nothing, another one will arrive a second later.
2334          */
2335         log_debugx("setting session timeout to %d seconds", timeout);
2336         bzero(&itv, sizeof(itv));
2337         itv.it_interval.tv_sec = 1;
2338         itv.it_value.tv_sec = timeout;
2339         error = setitimer(ITIMER_REAL, &itv, NULL);
2340         if (error != 0)
2341                 log_err(1, "setitimer");
2342 }
2343
2344 static int
2345 wait_for_children(bool block)
2346 {
2347         pid_t pid;
2348         int status;
2349         int num = 0;
2350
2351         for (;;) {
2352                 /*
2353                  * If "block" is true, wait for at least one process.
2354                  */
2355                 if (block && num == 0)
2356                         pid = wait4(-1, &status, 0, NULL);
2357                 else
2358                         pid = wait4(-1, &status, WNOHANG, NULL);
2359                 if (pid <= 0)
2360                         break;
2361                 if (WIFSIGNALED(status)) {
2362                         log_warnx("child process %d terminated with signal %d",
2363                             pid, WTERMSIG(status));
2364                 } else if (WEXITSTATUS(status) != 0) {
2365                         log_warnx("child process %d terminated with exit status %d",
2366                             pid, WEXITSTATUS(status));
2367                 } else {
2368                         log_debugx("child process %d terminated gracefully", pid);
2369                 }
2370                 num++;
2371         }
2372
2373         return (num);
2374 }
2375
2376 static void
2377 handle_connection(struct portal *portal, int fd,
2378     const struct sockaddr *client_sa, bool dont_fork)
2379 {
2380         struct connection *conn;
2381         int error;
2382         pid_t pid;
2383         char host[NI_MAXHOST + 1];
2384         struct conf *conf;
2385
2386         conf = portal->p_portal_group->pg_conf;
2387
2388         if (dont_fork) {
2389                 log_debugx("incoming connection; not forking due to -d flag");
2390         } else {
2391                 nchildren -= wait_for_children(false);
2392                 assert(nchildren >= 0);
2393
2394                 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) {
2395                         log_debugx("maxproc limit of %d child processes hit; "
2396                             "waiting for child process to exit", conf->conf_maxproc);
2397                         nchildren -= wait_for_children(true);
2398                         assert(nchildren >= 0);
2399                 }
2400                 log_debugx("incoming connection; forking child process #%d",
2401                     nchildren);
2402                 nchildren++;
2403                 pid = fork();
2404                 if (pid < 0)
2405                         log_err(1, "fork");
2406                 if (pid > 0) {
2407                         close(fd);
2408                         return;
2409                 }
2410         }
2411         pidfile_close(conf->conf_pidfh);
2412
2413         error = getnameinfo(client_sa, client_sa->sa_len,
2414             host, sizeof(host), NULL, 0, NI_NUMERICHOST);
2415         if (error != 0)
2416                 log_errx(1, "getnameinfo: %s", gai_strerror(error));
2417
2418         log_debugx("accepted connection from %s; portal group \"%s\"",
2419             host, portal->p_portal_group->pg_name);
2420         log_set_peer_addr(host);
2421         setproctitle("%s", host);
2422
2423         conn = connection_new(portal, fd, host, client_sa);
2424         set_timeout(conf->conf_timeout, true);
2425         kernel_capsicate();
2426         login(conn);
2427         if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
2428                 kernel_handoff(conn);
2429                 log_debugx("connection handed off to the kernel");
2430         } else {
2431                 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
2432                 discovery(conn);
2433         }
2434         log_debugx("nothing more to do; exiting");
2435         exit(0);
2436 }
2437
2438 static int
2439 fd_add(int fd, fd_set *fdset, int nfds)
2440 {
2441
2442         /*
2443          * Skip sockets which we failed to bind.
2444          */
2445         if (fd <= 0)
2446                 return (nfds);
2447
2448         FD_SET(fd, fdset);
2449         if (fd > nfds)
2450                 nfds = fd;
2451         return (nfds);
2452 }
2453
2454 static void
2455 main_loop(struct conf *conf, bool dont_fork)
2456 {
2457         struct portal_group *pg;
2458         struct portal *portal;
2459         struct sockaddr_storage client_sa;
2460         socklen_t client_salen;
2461 #ifdef ICL_KERNEL_PROXY
2462         int connection_id;
2463         int portal_id;
2464 #endif
2465         fd_set fdset;
2466         int error, nfds, client_fd;
2467
2468         pidfile_write(conf->conf_pidfh);
2469
2470         for (;;) {
2471                 if (sighup_received || sigterm_received || timed_out())
2472                         return;
2473
2474 #ifdef ICL_KERNEL_PROXY
2475                 if (proxy_mode) {
2476                         client_salen = sizeof(client_sa);
2477                         kernel_accept(&connection_id, &portal_id,
2478                             (struct sockaddr *)&client_sa, &client_salen);
2479                         assert(client_salen >= client_sa.ss_len);
2480
2481                         log_debugx("incoming connection, id %d, portal id %d",
2482                             connection_id, portal_id);
2483                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2484                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2485                                         if (portal->p_id == portal_id) {
2486                                                 goto found;
2487                                         }
2488                                 }
2489                         }
2490
2491                         log_errx(1, "kernel returned invalid portal_id %d",
2492                             portal_id);
2493
2494 found:
2495                         handle_connection(portal, connection_id,
2496                             (struct sockaddr *)&client_sa, dont_fork);
2497                 } else {
2498 #endif
2499                         assert(proxy_mode == false);
2500
2501                         FD_ZERO(&fdset);
2502                         nfds = 0;
2503                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2504                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
2505                                         nfds = fd_add(portal->p_socket, &fdset, nfds);
2506                         }
2507                         error = select(nfds + 1, &fdset, NULL, NULL, NULL);
2508                         if (error <= 0) {
2509                                 if (errno == EINTR)
2510                                         return;
2511                                 log_err(1, "select");
2512                         }
2513                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2514                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2515                                         if (!FD_ISSET(portal->p_socket, &fdset))
2516                                                 continue;
2517                                         client_salen = sizeof(client_sa);
2518                                         client_fd = accept(portal->p_socket,
2519                                             (struct sockaddr *)&client_sa,
2520                                             &client_salen);
2521                                         if (client_fd < 0) {
2522                                                 if (errno == ECONNABORTED)
2523                                                         continue;
2524                                                 log_err(1, "accept");
2525                                         }
2526                                         assert(client_salen >= client_sa.ss_len);
2527
2528                                         handle_connection(portal, client_fd,
2529                                             (struct sockaddr *)&client_sa,
2530                                             dont_fork);
2531                                         break;
2532                                 }
2533                         }
2534 #ifdef ICL_KERNEL_PROXY
2535                 }
2536 #endif
2537         }
2538 }
2539
2540 static void
2541 sighup_handler(int dummy __unused)
2542 {
2543
2544         sighup_received = true;
2545 }
2546
2547 static void
2548 sigterm_handler(int dummy __unused)
2549 {
2550
2551         sigterm_received = true;
2552 }
2553
2554 static void
2555 sigchld_handler(int dummy __unused)
2556 {
2557
2558         /*
2559          * The only purpose of this handler is to make SIGCHLD
2560          * interrupt the ISCSIDWAIT ioctl(2), so we can call
2561          * wait_for_children().
2562          */
2563 }
2564
2565 static void
2566 register_signals(void)
2567 {
2568         struct sigaction sa;
2569         int error;
2570
2571         bzero(&sa, sizeof(sa));
2572         sa.sa_handler = sighup_handler;
2573         sigfillset(&sa.sa_mask);
2574         error = sigaction(SIGHUP, &sa, NULL);
2575         if (error != 0)
2576                 log_err(1, "sigaction");
2577
2578         sa.sa_handler = sigterm_handler;
2579         error = sigaction(SIGTERM, &sa, NULL);
2580         if (error != 0)
2581                 log_err(1, "sigaction");
2582
2583         sa.sa_handler = sigterm_handler;
2584         error = sigaction(SIGINT, &sa, NULL);
2585         if (error != 0)
2586                 log_err(1, "sigaction");
2587
2588         sa.sa_handler = sigchld_handler;
2589         error = sigaction(SIGCHLD, &sa, NULL);
2590         if (error != 0)
2591                 log_err(1, "sigaction");
2592 }
2593
2594 static void
2595 check_perms(const char *path)
2596 {
2597         struct stat sb;
2598         int error;
2599
2600         error = stat(path, &sb);
2601         if (error != 0) {
2602                 log_warn("stat");
2603                 return;
2604         }
2605         if (sb.st_mode & S_IWOTH) {
2606                 log_warnx("%s is world-writable", path);
2607         } else if (sb.st_mode & S_IROTH) {
2608                 log_warnx("%s is world-readable", path);
2609         } else if (sb.st_mode & S_IXOTH) {
2610                 /*
2611                  * Ok, this one doesn't matter, but still do it,
2612                  * just for consistency.
2613                  */
2614                 log_warnx("%s is world-executable", path);
2615         }
2616
2617         /*
2618          * XXX: Should we also check for owner != 0?
2619          */
2620 }
2621
2622 static struct conf *
2623 conf_new_from_file(const char *path, struct conf *oldconf, bool ucl)
2624 {
2625         struct conf *conf;
2626         struct auth_group *ag;
2627         struct portal_group *pg;
2628         struct pport *pp;
2629         int error;
2630
2631         log_debugx("obtaining configuration from %s", path);
2632
2633         conf = conf_new();
2634
2635         TAILQ_FOREACH(pp, &oldconf->conf_pports, pp_next)
2636                 pport_copy(pp, conf);
2637
2638         ag = auth_group_new(conf, "default");
2639         assert(ag != NULL);
2640
2641         ag = auth_group_new(conf, "no-authentication");
2642         assert(ag != NULL);
2643         ag->ag_type = AG_TYPE_NO_AUTHENTICATION;
2644
2645         ag = auth_group_new(conf, "no-access");
2646         assert(ag != NULL);
2647         ag->ag_type = AG_TYPE_DENY;
2648
2649         pg = portal_group_new(conf, "default");
2650         assert(pg != NULL);
2651
2652         if (ucl)
2653                 error = uclparse_conf(conf, path);
2654         else
2655                 error = parse_conf(conf, path);
2656
2657         if (error != 0) {
2658                 conf_delete(conf);
2659                 return (NULL);
2660         }
2661
2662         check_perms(path);
2663
2664         if (conf->conf_default_ag_defined == false) {
2665                 log_debugx("auth-group \"default\" not defined; "
2666                     "going with defaults");
2667                 ag = auth_group_find(conf, "default");
2668                 assert(ag != NULL);
2669                 ag->ag_type = AG_TYPE_DENY;
2670         }
2671
2672         if (conf->conf_default_pg_defined == false) {
2673                 log_debugx("portal-group \"default\" not defined; "
2674                     "going with defaults");
2675                 pg = portal_group_find(conf, "default");
2676                 assert(pg != NULL);
2677                 portal_group_add_listen(pg, "0.0.0.0:3260", false);
2678                 portal_group_add_listen(pg, "[::]:3260", false);
2679         }
2680
2681         conf->conf_kernel_port_on = true;
2682
2683         error = conf_verify(conf);
2684         if (error != 0) {
2685                 conf_delete(conf);
2686                 return (NULL);
2687         }
2688
2689         return (conf);
2690 }
2691
2692 int
2693 main(int argc, char **argv)
2694 {
2695         struct conf *oldconf, *newconf, *tmpconf;
2696         struct isns *newns;
2697         const char *config_path = DEFAULT_CONFIG_PATH;
2698         int debug = 0, ch, error;
2699         bool dont_daemonize = false;
2700         bool test_config = false;
2701         bool use_ucl = false;
2702
2703         while ((ch = getopt(argc, argv, "dtuf:R")) != -1) {
2704                 switch (ch) {
2705                 case 'd':
2706                         dont_daemonize = true;
2707                         debug++;
2708                         break;
2709                 case 't':
2710                         test_config = true;
2711                         break;
2712                 case 'u':
2713                         use_ucl = true;
2714                         break;
2715                 case 'f':
2716                         config_path = optarg;
2717                         break;
2718                 case 'R':
2719 #ifndef ICL_KERNEL_PROXY
2720                         log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY "
2721                             "does not support iSER protocol");
2722 #endif
2723                         proxy_mode = true;
2724                         break;
2725                 case '?':
2726                 default:
2727                         usage();
2728                 }
2729         }
2730         argc -= optind;
2731         if (argc != 0)
2732                 usage();
2733
2734         log_init(debug);
2735         kernel_init();
2736
2737         oldconf = conf_new_from_kernel();
2738         newconf = conf_new_from_file(config_path, oldconf, use_ucl);
2739
2740         if (newconf == NULL)
2741                 log_errx(1, "configuration error; exiting");
2742
2743         if (test_config)
2744                 return (0);
2745
2746         if (debug > 0) {
2747                 oldconf->conf_debug = debug;
2748                 newconf->conf_debug = debug;
2749         }
2750
2751         error = conf_apply(oldconf, newconf);
2752         if (error != 0)
2753                 log_errx(1, "failed to apply configuration; exiting");
2754
2755         conf_delete(oldconf);
2756         oldconf = NULL;
2757
2758         register_signals();
2759
2760         if (dont_daemonize == false) {
2761                 log_debugx("daemonizing");
2762                 if (daemon(0, 0) == -1) {
2763                         log_warn("cannot daemonize");
2764                         pidfile_remove(newconf->conf_pidfh);
2765                         exit(1);
2766                 }
2767         }
2768
2769         /* Schedule iSNS update */
2770         if (!TAILQ_EMPTY(&newconf->conf_isns))
2771                 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2772
2773         for (;;) {
2774                 main_loop(newconf, dont_daemonize);
2775                 if (sighup_received) {
2776                         sighup_received = false;
2777                         log_debugx("received SIGHUP, reloading configuration");
2778                         tmpconf = conf_new_from_file(config_path, newconf,
2779                             use_ucl);
2780
2781                         if (tmpconf == NULL) {
2782                                 log_warnx("configuration error, "
2783                                     "continuing with old configuration");
2784                         } else {
2785                                 if (debug > 0)
2786                                         tmpconf->conf_debug = debug;
2787                                 oldconf = newconf;
2788                                 newconf = tmpconf;
2789                                 error = conf_apply(oldconf, newconf);
2790                                 if (error != 0)
2791                                         log_warnx("failed to reload "
2792                                             "configuration");
2793                                 conf_delete(oldconf);
2794                                 oldconf = NULL;
2795                         }
2796                 } else if (sigterm_received) {
2797                         log_debugx("exiting on signal; "
2798                             "reloading empty configuration");
2799
2800                         log_debugx("removing CTL iSCSI ports "
2801                             "and terminating all connections");
2802
2803                         oldconf = newconf;
2804                         newconf = conf_new();
2805                         if (debug > 0)
2806                                 newconf->conf_debug = debug;
2807                         error = conf_apply(oldconf, newconf);
2808                         if (error != 0)
2809                                 log_warnx("failed to apply configuration");
2810                         conf_delete(oldconf);
2811                         oldconf = NULL;
2812
2813                         log_warnx("exiting on signal");
2814                         exit(0);
2815                 } else {
2816                         nchildren -= wait_for_children(false);
2817                         assert(nchildren >= 0);
2818                         if (timed_out()) {
2819                                 set_timeout(0, false);
2820                                 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next)
2821                                         isns_check(newns);
2822                                 /* Schedule iSNS update */
2823                                 if (!TAILQ_EMPTY(&newconf->conf_isns)) {
2824                                         set_timeout((newconf->conf_isns_period
2825                                             + 2) / 3,
2826                                             false);
2827                                 }
2828                         }
2829                 }
2830         }
2831         /* NOTREACHED */
2832 }