usr.sbin/ctld/ctld.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2012 The FreeBSD Foundation
   5  *
   6  * This software was developed by Edward Tomasz Napierala under sponsorship
   7  * from the FreeBSD Foundation.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #include <sys/types.h>
  34 #include <sys/time.h>
  35 #include <sys/socket.h>
  36 #include <sys/stat.h>
  37 #include <sys/wait.h>
  38 #include <netinet/in.h>
  39 #include <arpa/inet.h>
  40 #include <assert.h>
  41 #include <ctype.h>
  42 #include <errno.h>
  43 #include <netdb.h>
  44 #include <signal.h>
  45 #include <stdbool.h>
  46 #include <stdio.h>
  47 #include <stdint.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <unistd.h>
  51
  52 #include "ctld.h"
  53 #include "isns.h"
  54
  55 static bool     timed_out(void);
  56 #ifdef ICL_KERNEL_PROXY
  57 static void     pdu_receive_proxy(struct pdu *pdu);
  58 static void     pdu_send_proxy(struct pdu *pdu);
  59 #endif /* ICL_KERNEL_PROXY */
  60 static void     pdu_fail(const struct connection *conn, const char *reason);
  61
  62 bool proxy_mode = false;
  63
  64 static volatile bool sighup_received = false;
  65 static volatile bool sigterm_received = false;
  66 static volatile bool sigalrm_received = false;
  67
  68 static int nchildren = 0;
  69 static uint16_t last_portal_group_tag = 0xff;
  70
  71 static struct connection_ops conn_ops = {
  72         .timed_out = timed_out,
  73 #ifdef ICL_KERNEL_PROXY
  74         .pdu_receive_proxy = pdu_receive_proxy,
  75         .pdu_send_proxy = pdu_send_proxy,
  76 #endif
  77         .fail = pdu_fail,
  78 };
  79
  80 static void
  81 usage(void)
  82 {
  83
  84         fprintf(stderr, "usage: ctld [-d][-u][-f config-file]\n");
  85         fprintf(stderr, "       ctld -t [-u][-f config-file]\n");
  86         exit(1);
  87 }
  88
  89 struct conf *
  90 conf_new(void)
  91 {
  92         struct conf *conf;
  93
  94         conf = calloc(1, sizeof(*conf));
  95         if (conf == NULL)
  96                 log_err(1, "calloc");
  97         TAILQ_INIT(&conf->conf_luns);
  98         TAILQ_INIT(&conf->conf_targets);
  99         TAILQ_INIT(&conf->conf_auth_groups);
 100         TAILQ_INIT(&conf->conf_ports);
 101         TAILQ_INIT(&conf->conf_portal_groups);
 102         TAILQ_INIT(&conf->conf_pports);
 103         TAILQ_INIT(&conf->conf_isns);
 104
 105         conf->conf_isns_period = 900;
 106         conf->conf_isns_timeout = 5;
 107         conf->conf_debug = 0;
 108         conf->conf_timeout = 60;
 109         conf->conf_maxproc = 30;
 110
 111         return (conf);
 112 }
 113
 114 void
 115 conf_delete(struct conf *conf)
 116 {
 117         struct lun *lun, *ltmp;
 118         struct target *targ, *tmp;
 119         struct auth_group *ag, *cagtmp;
 120         struct portal_group *pg, *cpgtmp;
 121         struct pport *pp, *pptmp;
 122         struct isns *is, *istmp;
 123
 124         assert(conf->conf_pidfh == NULL);
 125
 126         TAILQ_FOREACH_SAFE(lun, &conf->conf_luns, l_next, ltmp)
 127                 lun_delete(lun);
 128         TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp)
 129                 target_delete(targ);
 130         TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp)
 131                 auth_group_delete(ag);
 132         TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp)
 133                 portal_group_delete(pg);
 134         TAILQ_FOREACH_SAFE(pp, &conf->conf_pports, pp_next, pptmp)
 135                 pport_delete(pp);
 136         TAILQ_FOREACH_SAFE(is, &conf->conf_isns, i_next, istmp)
 137                 isns_delete(is);
 138         assert(TAILQ_EMPTY(&conf->conf_ports));
 139         free(conf->conf_pidfile_path);
 140         free(conf);
 141 }
 142
 143 static struct auth *
 144 auth_new(struct auth_group *ag)
 145 {
 146         struct auth *auth;
 147
 148         auth = calloc(1, sizeof(*auth));
 149         if (auth == NULL)
 150                 log_err(1, "calloc");
 151         auth->a_auth_group = ag;
 152         TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next);
 153         return (auth);
 154 }
 155
 156 static void
 157 auth_delete(struct auth *auth)
 158 {
 159         TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next);
 160
 161         free(auth->a_user);
 162         free(auth->a_secret);
 163         free(auth->a_mutual_user);
 164         free(auth->a_mutual_secret);
 165         free(auth);
 166 }
 167
 168 const struct auth *
 169 auth_find(const struct auth_group *ag, const char *user)
 170 {
 171         const struct auth *auth;
 172
 173         TAILQ_FOREACH(auth, &ag->ag_auths, a_next) {
 174                 if (strcmp(auth->a_user, user) == 0)
 175                         return (auth);
 176         }
 177
 178         return (NULL);
 179 }
 180
 181 static void
 182 auth_check_secret_length(struct auth *auth)
 183 {
 184         size_t len;
 185
 186         len = strlen(auth->a_secret);
 187         if (len > 16) {
 188                 if (auth->a_auth_group->ag_name != NULL)
 189                         log_warnx("secret for user \"%s\", auth-group \"%s\", "
 190                             "is too long; it should be at most 16 characters "
 191                             "long", auth->a_user, auth->a_auth_group->ag_name);
 192                 else
 193                         log_warnx("secret for user \"%s\", target \"%s\", "
 194                             "is too long; it should be at most 16 characters "
 195                             "long", auth->a_user,
 196                             auth->a_auth_group->ag_target->t_name);
 197         }
 198         if (len < 12) {
 199                 if (auth->a_auth_group->ag_name != NULL)
 200                         log_warnx("secret for user \"%s\", auth-group \"%s\", "
 201                             "is too short; it should be at least 12 characters "
 202                             "long", auth->a_user,
 203                             auth->a_auth_group->ag_name);
 204                 else
 205                         log_warnx("secret for user \"%s\", target \"%s\", "
 206                             "is too short; it should be at least 12 characters "
 207                             "long", auth->a_user,
 208                             auth->a_auth_group->ag_target->t_name);
 209         }
 210
 211         if (auth->a_mutual_secret != NULL) {
 212                 len = strlen(auth->a_mutual_secret);
 213                 if (len > 16) {
 214                         if (auth->a_auth_group->ag_name != NULL)
 215                                 log_warnx("mutual secret for user \"%s\", "
 216                                     "auth-group \"%s\", is too long; it should "
 217                                     "be at most 16 characters long",
 218                                     auth->a_user, auth->a_auth_group->ag_name);
 219                         else
 220                                 log_warnx("mutual secret for user \"%s\", "
 221                                     "target \"%s\", is too long; it should "
 222                                     "be at most 16 characters long",
 223                                     auth->a_user,
 224                                     auth->a_auth_group->ag_target->t_name);
 225                 }
 226                 if (len < 12) {
 227                         if (auth->a_auth_group->ag_name != NULL)
 228                                 log_warnx("mutual secret for user \"%s\", "
 229                                     "auth-group \"%s\", is too short; it "
 230                                     "should be at least 12 characters long",
 231                                     auth->a_user, auth->a_auth_group->ag_name);
 232                         else
 233                                 log_warnx("mutual secret for user \"%s\", "
 234                                     "target \"%s\", is too short; it should be "
 235                                     "at least 12 characters long",
 236                                     auth->a_user,
 237                                     auth->a_auth_group->ag_target->t_name);
 238                 }
 239         }
 240 }
 241
 242 const struct auth *
 243 auth_new_chap(struct auth_group *ag, const char *user,
 244     const char *secret)
 245 {
 246         struct auth *auth;
 247
 248         if (ag->ag_type == AG_TYPE_UNKNOWN)
 249                 ag->ag_type = AG_TYPE_CHAP;
 250         if (ag->ag_type != AG_TYPE_CHAP) {
 251                 if (ag->ag_name != NULL)
 252                         log_warnx("cannot mix \"chap\" authentication with "
 253                             "other types for auth-group \"%s\"", ag->ag_name);
 254                 else
 255                         log_warnx("cannot mix \"chap\" authentication with "
 256                             "other types for target \"%s\"",
 257                             ag->ag_target->t_name);
 258                 return (NULL);
 259         }
 260
 261         auth = auth_new(ag);
 262         auth->a_user = checked_strdup(user);
 263         auth->a_secret = checked_strdup(secret);
 264
 265         auth_check_secret_length(auth);
 266
 267         return (auth);
 268 }
 269
 270 const struct auth *
 271 auth_new_chap_mutual(struct auth_group *ag, const char *user,
 272     const char *secret, const char *user2, const char *secret2)
 273 {
 274         struct auth *auth;
 275
 276         if (ag->ag_type == AG_TYPE_UNKNOWN)
 277                 ag->ag_type = AG_TYPE_CHAP_MUTUAL;
 278         if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) {
 279                 if (ag->ag_name != NULL)
 280                         log_warnx("cannot mix \"chap-mutual\" authentication "
 281                             "with other types for auth-group \"%s\"",
 282                             ag->ag_name);
 283                 else
 284                         log_warnx("cannot mix \"chap-mutual\" authentication "
 285                             "with other types for target \"%s\"",
 286                             ag->ag_target->t_name);
 287                 return (NULL);
 288         }
 289
 290         auth = auth_new(ag);
 291         auth->a_user = checked_strdup(user);
 292         auth->a_secret = checked_strdup(secret);
 293         auth->a_mutual_user = checked_strdup(user2);
 294         auth->a_mutual_secret = checked_strdup(secret2);
 295
 296         auth_check_secret_length(auth);
 297
 298         return (auth);
 299 }
 300
 301 const struct auth_name *
 302 auth_name_new(struct auth_group *ag, const char *name)
 303 {
 304         struct auth_name *an;
 305
 306         an = calloc(1, sizeof(*an));
 307         if (an == NULL)
 308                 log_err(1, "calloc");
 309         an->an_auth_group = ag;
 310         an->an_initiator_name = checked_strdup(name);
 311         TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next);
 312         return (an);
 313 }
 314
 315 static void
 316 auth_name_delete(struct auth_name *an)
 317 {
 318         TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next);
 319
 320         free(an->an_initiator_name);
 321         free(an);
 322 }
 323
 324 bool
 325 auth_name_defined(const struct auth_group *ag)
 326 {
 327         if (TAILQ_EMPTY(&ag->ag_names))
 328                 return (false);
 329         return (true);
 330 }
 331
 332 const struct auth_name *
 333 auth_name_find(const struct auth_group *ag, const char *name)
 334 {
 335         const struct auth_name *auth_name;
 336
 337         TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) {
 338                 if (strcmp(auth_name->an_initiator_name, name) == 0)
 339                         return (auth_name);
 340         }
 341
 342         return (NULL);
 343 }
 344
 345 int
 346 auth_name_check(const struct auth_group *ag, const char *initiator_name)
 347 {
 348         if (!auth_name_defined(ag))
 349                 return (0);
 350
 351         if (auth_name_find(ag, initiator_name) == NULL)
 352                 return (1);
 353
 354         return (0);
 355 }
 356
 357 const struct auth_portal *
 358 auth_portal_new(struct auth_group *ag, const char *portal)
 359 {
 360         struct auth_portal *ap;
 361         char *net, *mask, *str, *tmp;
 362         int len, dm, m;
 363
 364         ap = calloc(1, sizeof(*ap));
 365         if (ap == NULL)
 366                 log_err(1, "calloc");
 367         ap->ap_auth_group = ag;
 368         ap->ap_initiator_portal = checked_strdup(portal);
 369         mask = str = checked_strdup(portal);
 370         net = strsep(&mask, "/");
 371         if (net[0] == '[')
 372                 net++;
 373         len = strlen(net);
 374         if (len == 0)
 375                 goto error;
 376         if (net[len - 1] == ']')
 377                 net[len - 1] = 0;
 378         if (strchr(net, ':') != NULL) {
 379                 struct sockaddr_in6 *sin6 =
 380                     (struct sockaddr_in6 *)&ap->ap_sa;
 381
 382                 sin6->sin6_len = sizeof(*sin6);
 383                 sin6->sin6_family = AF_INET6;
 384                 if (inet_pton(AF_INET6, net, &sin6->sin6_addr) <= 0)
 385                         goto error;
 386                 dm = 128;
 387         } else {
 388                 struct sockaddr_in *sin =
 389                     (struct sockaddr_in *)&ap->ap_sa;
 390
 391                 sin->sin_len = sizeof(*sin);
 392                 sin->sin_family = AF_INET;
 393                 if (inet_pton(AF_INET, net, &sin->sin_addr) <= 0)
 394                         goto error;
 395                 dm = 32;
 396         }
 397         if (mask != NULL) {
 398                 m = strtol(mask, &tmp, 0);
 399                 if (m < 0 || m > dm || tmp[0] != 0)
 400                         goto error;
 401         } else
 402                 m = dm;
 403         ap->ap_mask = m;
 404         free(str);
 405         TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next);
 406         return (ap);
 407
 408 error:
 409         free(str);
 410         free(ap);
 411         log_warnx("incorrect initiator portal \"%s\"", portal);
 412         return (NULL);
 413 }
 414
 415 static void
 416 auth_portal_delete(struct auth_portal *ap)
 417 {
 418         TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next);
 419
 420         free(ap->ap_initiator_portal);
 421         free(ap);
 422 }
 423
 424 bool
 425 auth_portal_defined(const struct auth_group *ag)
 426 {
 427         if (TAILQ_EMPTY(&ag->ag_portals))
 428                 return (false);
 429         return (true);
 430 }
 431
 432 const struct auth_portal *
 433 auth_portal_find(const struct auth_group *ag, const struct sockaddr_storage *ss)
 434 {
 435         const struct auth_portal *ap;
 436         const uint8_t *a, *b;
 437         int i;
 438         uint8_t bmask;
 439
 440         TAILQ_FOREACH(ap, &ag->ag_portals, ap_next) {
 441                 if (ap->ap_sa.ss_family != ss->ss_family)
 442                         continue;
 443                 if (ss->ss_family == AF_INET) {
 444                         a = (const uint8_t *)
 445                             &((const struct sockaddr_in *)ss)->sin_addr;
 446                         b = (const uint8_t *)
 447                             &((const struct sockaddr_in *)&ap->ap_sa)->sin_addr;
 448                 } else {
 449                         a = (const uint8_t *)
 450                             &((const struct sockaddr_in6 *)ss)->sin6_addr;
 451                         b = (const uint8_t *)
 452                             &((const struct sockaddr_in6 *)&ap->ap_sa)->sin6_addr;
 453                 }
 454                 for (i = 0; i < ap->ap_mask / 8; i++) {
 455                         if (a[i] != b[i])
 456                                 goto next;
 457                 }
 458                 if (ap->ap_mask % 8) {
 459                         bmask = 0xff << (8 - (ap->ap_mask % 8));
 460                         if ((a[i] & bmask) != (b[i] & bmask))
 461                                 goto next;
 462                 }
 463                 return (ap);
 464 next:
 465                 ;
 466         }
 467
 468         return (NULL);
 469 }
 470
 471 int
 472 auth_portal_check(const struct auth_group *ag, const struct sockaddr_storage *sa)
 473 {
 474
 475         if (!auth_portal_defined(ag))
 476                 return (0);
 477
 478         if (auth_portal_find(ag, sa) == NULL)
 479                 return (1);
 480
 481         return (0);
 482 }
 483
 484 struct auth_group *
 485 auth_group_new(struct conf *conf, const char *name)
 486 {
 487         struct auth_group *ag;
 488
 489         if (name != NULL) {
 490                 ag = auth_group_find(conf, name);
 491                 if (ag != NULL) {
 492                         log_warnx("duplicated auth-group \"%s\"", name);
 493                         return (NULL);
 494                 }
 495         }
 496
 497         ag = calloc(1, sizeof(*ag));
 498         if (ag == NULL)
 499                 log_err(1, "calloc");
 500         if (name != NULL)
 501                 ag->ag_name = checked_strdup(name);
 502         TAILQ_INIT(&ag->ag_auths);
 503         TAILQ_INIT(&ag->ag_names);
 504         TAILQ_INIT(&ag->ag_portals);
 505         ag->ag_conf = conf;
 506         TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next);
 507
 508         return (ag);
 509 }
 510
 511 void
 512 auth_group_delete(struct auth_group *ag)
 513 {
 514         struct auth *auth, *auth_tmp;
 515         struct auth_name *auth_name, *auth_name_tmp;
 516         struct auth_portal *auth_portal, *auth_portal_tmp;
 517
 518         TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next);
 519
 520         TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp)
 521                 auth_delete(auth);
 522         TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp)
 523                 auth_name_delete(auth_name);
 524         TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next,
 525             auth_portal_tmp)
 526                 auth_portal_delete(auth_portal);
 527         free(ag->ag_name);
 528         free(ag);
 529 }
 530
 531 struct auth_group *
 532 auth_group_find(const struct conf *conf, const char *name)
 533 {
 534         struct auth_group *ag;
 535
 536         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
 537                 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0)
 538                         return (ag);
 539         }
 540
 541         return (NULL);
 542 }
 543
 544 int
 545 auth_group_set_type(struct auth_group *ag, const char *str)
 546 {
 547         int type;
 548
 549         if (strcmp(str, "none") == 0) {
 550                 type = AG_TYPE_NO_AUTHENTICATION;
 551         } else if (strcmp(str, "deny") == 0) {
 552                 type = AG_TYPE_DENY;
 553         } else if (strcmp(str, "chap") == 0) {
 554                 type = AG_TYPE_CHAP;
 555         } else if (strcmp(str, "chap-mutual") == 0) {
 556                 type = AG_TYPE_CHAP_MUTUAL;
 557         } else {
 558                 if (ag->ag_name != NULL)
 559                         log_warnx("invalid auth-type \"%s\" for auth-group "
 560                             "\"%s\"", str, ag->ag_name);
 561                 else
 562                         log_warnx("invalid auth-type \"%s\" for target "
 563                             "\"%s\"", str, ag->ag_target->t_name);
 564                 return (1);
 565         }
 566
 567         if (ag->ag_type != AG_TYPE_UNKNOWN && ag->ag_type != type) {
 568                 if (ag->ag_name != NULL) {
 569                         log_warnx("cannot set auth-type to \"%s\" for "
 570                             "auth-group \"%s\"; already has a different "
 571                             "type", str, ag->ag_name);
 572                 } else {
 573                         log_warnx("cannot set auth-type to \"%s\" for target "
 574                             "\"%s\"; already has a different type",
 575                             str, ag->ag_target->t_name);
 576                 }
 577                 return (1);
 578         }
 579
 580         ag->ag_type = type;
 581
 582         return (0);
 583 }
 584
 585 static struct portal *
 586 portal_new(struct portal_group *pg)
 587 {
 588         struct portal *portal;
 589
 590         portal = calloc(1, sizeof(*portal));
 591         if (portal == NULL)
 592                 log_err(1, "calloc");
 593         TAILQ_INIT(&portal->p_targets);
 594         portal->p_portal_group = pg;
 595         TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next);
 596         return (portal);
 597 }
 598
 599 static void
 600 portal_delete(struct portal *portal)
 601 {
 602
 603         TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next);
 604         if (portal->p_ai != NULL)
 605                 freeaddrinfo(portal->p_ai);
 606         free(portal->p_listen);
 607         free(portal);
 608 }
 609
 610 struct portal_group *
 611 portal_group_new(struct conf *conf, const char *name)
 612 {
 613         struct portal_group *pg;
 614
 615         pg = portal_group_find(conf, name);
 616         if (pg != NULL) {
 617                 log_warnx("duplicated portal-group \"%s\"", name);
 618                 return (NULL);
 619         }
 620
 621         pg = calloc(1, sizeof(*pg));
 622         if (pg == NULL)
 623                 log_err(1, "calloc");
 624         pg->pg_name = checked_strdup(name);
 625         TAILQ_INIT(&pg->pg_options);
 626         TAILQ_INIT(&pg->pg_portals);
 627         TAILQ_INIT(&pg->pg_ports);
 628         pg->pg_conf = conf;
 629         pg->pg_tag = 0;         /* Assigned later in conf_apply(). */
 630         pg->pg_dscp = -1;
 631         pg->pg_pcp = -1;
 632         TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next);
 633
 634         return (pg);
 635 }
 636
 637 void
 638 portal_group_delete(struct portal_group *pg)
 639 {
 640         struct portal *portal, *tmp;
 641         struct port *port, *tport;
 642         struct option *o, *otmp;
 643
 644         TAILQ_FOREACH_SAFE(port, &pg->pg_ports, p_pgs, tport)
 645                 port_delete(port);
 646         TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next);
 647
 648         TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp)
 649                 portal_delete(portal);
 650         TAILQ_FOREACH_SAFE(o, &pg->pg_options, o_next, otmp)
 651                 option_delete(&pg->pg_options, o);
 652         free(pg->pg_name);
 653         free(pg->pg_offload);
 654         free(pg->pg_redirection);
 655         free(pg);
 656 }
 657
 658 struct portal_group *
 659 portal_group_find(const struct conf *conf, const char *name)
 660 {
 661         struct portal_group *pg;
 662
 663         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
 664                 if (strcmp(pg->pg_name, name) == 0)
 665                         return (pg);
 666         }
 667
 668         return (NULL);
 669 }
 670
 671 static int
 672 parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai)
 673 {
 674         struct addrinfo hints;
 675         char *str, *addr, *ch;
 676         const char *port;
 677         int error, colons = 0;
 678
 679         str = arg = strdup(arg);
 680         if (arg[0] == '[') {
 681                 /*
 682                  * IPv6 address in square brackets, perhaps with port.
 683                  */
 684                 arg++;
 685                 addr = strsep(&arg, "]");
 686                 if (arg == NULL) {
 687                         free(str);
 688                         return (1);
 689                 }
 690                 if (arg[0] == '\0') {
 691                         port = def_port;
 692                 } else if (arg[0] == ':') {
 693                         port = arg + 1;
 694                 } else {
 695                         free(str);
 696                         return (1);
 697                 }
 698         } else {
 699                 /*
 700                  * Either IPv6 address without brackets - and without
 701                  * a port - or IPv4 address.  Just count the colons.
 702                  */
 703                 for (ch = arg; *ch != '\0'; ch++) {
 704                         if (*ch == ':')
 705                                 colons++;
 706                 }
 707                 if (colons > 1) {
 708                         addr = arg;
 709                         port = def_port;
 710                 } else {
 711                         addr = strsep(&arg, ":");
 712                         if (arg == NULL)
 713                                 port = def_port;
 714                         else
 715                                 port = arg;
 716                 }
 717         }
 718
 719         memset(&hints, 0, sizeof(hints));
 720         hints.ai_family = PF_UNSPEC;
 721         hints.ai_socktype = SOCK_STREAM;
 722         hints.ai_flags = AI_PASSIVE;
 723         error = getaddrinfo(addr, port, &hints, ai);
 724         free(str);
 725         return ((error != 0) ? 1 : 0);
 726 }
 727
 728 int
 729 portal_group_add_listen(struct portal_group *pg, const char *value, bool iser)
 730 {
 731         struct portal *portal;
 732
 733         portal = portal_new(pg);
 734         portal->p_listen = checked_strdup(value);
 735         portal->p_iser = iser;
 736
 737         if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) {
 738                 log_warnx("invalid listen address %s", portal->p_listen);
 739                 portal_delete(portal);
 740                 return (1);
 741         }
 742
 743         /*
 744          * XXX: getaddrinfo(3) may return multiple addresses; we should turn
 745          *      those into multiple portals.
 746          */
 747
 748         return (0);
 749 }
 750
 751 int
 752 isns_new(struct conf *conf, const char *addr)
 753 {
 754         struct isns *isns;
 755
 756         isns = calloc(1, sizeof(*isns));
 757         if (isns == NULL)
 758                 log_err(1, "calloc");
 759         isns->i_conf = conf;
 760         TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next);
 761         isns->i_addr = checked_strdup(addr);
 762
 763         if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) {
 764                 log_warnx("invalid iSNS address %s", isns->i_addr);
 765                 isns_delete(isns);
 766                 return (1);
 767         }
 768
 769         /*
 770          * XXX: getaddrinfo(3) may return multiple addresses; we should turn
 771          *      those into multiple servers.
 772          */
 773
 774         return (0);
 775 }
 776
 777 void
 778 isns_delete(struct isns *isns)
 779 {
 780
 781         TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next);
 782         free(isns->i_addr);
 783         if (isns->i_ai != NULL)
 784                 freeaddrinfo(isns->i_ai);
 785         free(isns);
 786 }
 787
 788 static int
 789 isns_do_connect(struct isns *isns)
 790 {
 791         int s;
 792
 793         s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype,
 794             isns->i_ai->ai_protocol);
 795         if (s < 0) {
 796                 log_warn("socket(2) failed for %s", isns->i_addr);
 797                 return (-1);
 798         }
 799         if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) {
 800                 log_warn("connect(2) failed for %s", isns->i_addr);
 801                 close(s);
 802                 return (-1);
 803         }
 804         return(s);
 805 }
 806
 807 static int
 808 isns_do_register(struct isns *isns, int s, const char *hostname)
 809 {
 810         struct conf *conf = isns->i_conf;
 811         struct target *target;
 812         struct portal *portal;
 813         struct portal_group *pg;
 814         struct port *port;
 815         struct isns_req *req;
 816         int res = 0;
 817         uint32_t error;
 818
 819         req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT);
 820         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 821         isns_req_add_delim(req);
 822         isns_req_add_str(req, 1, hostname);
 823         isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */
 824         isns_req_add_32(req, 6, conf->conf_isns_period);
 825         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
 826                 if (pg->pg_unassigned)
 827                         continue;
 828                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
 829                         isns_req_add_addr(req, 16, portal->p_ai);
 830                         isns_req_add_port(req, 17, portal->p_ai);
 831                 }
 832         }
 833         TAILQ_FOREACH(target, &conf->conf_targets, t_next) {
 834                 isns_req_add_str(req, 32, target->t_name);
 835                 isns_req_add_32(req, 33, 1); /* 1 -- Target*/
 836                 if (target->t_alias != NULL)
 837                         isns_req_add_str(req, 34, target->t_alias);
 838                 TAILQ_FOREACH(port, &target->t_ports, p_ts) {
 839                         if ((pg = port->p_portal_group) == NULL)
 840                                 continue;
 841                         isns_req_add_32(req, 51, pg->pg_tag);
 842                         TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
 843                                 isns_req_add_addr(req, 49, portal->p_ai);
 844                                 isns_req_add_port(req, 50, portal->p_ai);
 845                         }
 846                 }
 847         }
 848         res = isns_req_send(s, req);
 849         if (res < 0) {
 850                 log_warn("send(2) failed for %s", isns->i_addr);
 851                 goto quit;
 852         }
 853         res = isns_req_receive(s, req);
 854         if (res < 0) {
 855                 log_warn("receive(2) failed for %s", isns->i_addr);
 856                 goto quit;
 857         }
 858         error = isns_req_get_status(req);
 859         if (error != 0) {
 860                 log_warnx("iSNS register error %d for %s", error, isns->i_addr);
 861                 res = -1;
 862         }
 863 quit:
 864         isns_req_free(req);
 865         return (res);
 866 }
 867
 868 static int
 869 isns_do_check(struct isns *isns, int s, const char *hostname)
 870 {
 871         struct conf *conf = isns->i_conf;
 872         struct isns_req *req;
 873         int res = 0;
 874         uint32_t error;
 875
 876         req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT);
 877         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 878         isns_req_add_str(req, 1, hostname);
 879         isns_req_add_delim(req);
 880         isns_req_add(req, 2, 0, NULL);
 881         res = isns_req_send(s, req);
 882         if (res < 0) {
 883                 log_warn("send(2) failed for %s", isns->i_addr);
 884                 goto quit;
 885         }
 886         res = isns_req_receive(s, req);
 887         if (res < 0) {
 888                 log_warn("receive(2) failed for %s", isns->i_addr);
 889                 goto quit;
 890         }
 891         error = isns_req_get_status(req);
 892         if (error != 0) {
 893                 log_warnx("iSNS check error %d for %s", error, isns->i_addr);
 894                 res = -1;
 895         }
 896 quit:
 897         isns_req_free(req);
 898         return (res);
 899 }
 900
 901 static int
 902 isns_do_deregister(struct isns *isns, int s, const char *hostname)
 903 {
 904         struct conf *conf = isns->i_conf;
 905         struct isns_req *req;
 906         int res = 0;
 907         uint32_t error;
 908
 909         req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT);
 910         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 911         isns_req_add_delim(req);
 912         isns_req_add_str(req, 1, hostname);
 913         res = isns_req_send(s, req);
 914         if (res < 0) {
 915                 log_warn("send(2) failed for %s", isns->i_addr);
 916                 goto quit;
 917         }
 918         res = isns_req_receive(s, req);
 919         if (res < 0) {
 920                 log_warn("receive(2) failed for %s", isns->i_addr);
 921                 goto quit;
 922         }
 923         error = isns_req_get_status(req);
 924         if (error != 0) {
 925                 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr);
 926                 res = -1;
 927         }
 928 quit:
 929         isns_req_free(req);
 930         return (res);
 931 }
 932
 933 void
 934 isns_register(struct isns *isns, struct isns *oldisns)
 935 {
 936         struct conf *conf = isns->i_conf;
 937         int error, s;
 938         char hostname[256];
 939
 940         if (TAILQ_EMPTY(&conf->conf_targets) ||
 941             TAILQ_EMPTY(&conf->conf_portal_groups))
 942                 return;
 943         set_timeout(conf->conf_isns_timeout, false);
 944         s = isns_do_connect(isns);
 945         if (s < 0) {
 946                 set_timeout(0, false);
 947                 return;
 948         }
 949         error = gethostname(hostname, sizeof(hostname));
 950         if (error != 0)
 951                 log_err(1, "gethostname");
 952
 953         if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets))
 954                 oldisns = isns;
 955         isns_do_deregister(oldisns, s, hostname);
 956         isns_do_register(isns, s, hostname);
 957         close(s);
 958         set_timeout(0, false);
 959 }
 960
 961 void
 962 isns_check(struct isns *isns)
 963 {
 964         struct conf *conf = isns->i_conf;
 965         int error, s, res;
 966         char hostname[256];
 967
 968         if (TAILQ_EMPTY(&conf->conf_targets) ||
 969             TAILQ_EMPTY(&conf->conf_portal_groups))
 970                 return;
 971         set_timeout(conf->conf_isns_timeout, false);
 972         s = isns_do_connect(isns);
 973         if (s < 0) {
 974                 set_timeout(0, false);
 975                 return;
 976         }
 977         error = gethostname(hostname, sizeof(hostname));
 978         if (error != 0)
 979                 log_err(1, "gethostname");
 980
 981         res = isns_do_check(isns, s, hostname);
 982         if (res < 0) {
 983                 isns_do_deregister(isns, s, hostname);
 984                 isns_do_register(isns, s, hostname);
 985         }
 986         close(s);
 987         set_timeout(0, false);
 988 }
 989
 990 void
 991 isns_deregister(struct isns *isns)
 992 {
 993         struct conf *conf = isns->i_conf;
 994         int error, s;
 995         char hostname[256];
 996
 997         if (TAILQ_EMPTY(&conf->conf_targets) ||
 998             TAILQ_EMPTY(&conf->conf_portal_groups))
 999                 return;
1000         set_timeout(conf->conf_isns_timeout, false);
1001         s = isns_do_connect(isns);
1002         if (s < 0)
1003                 return;
1004         error = gethostname(hostname, sizeof(hostname));
1005         if (error != 0)
1006                 log_err(1, "gethostname");
1007
1008         isns_do_deregister(isns, s, hostname);
1009         close(s);
1010         set_timeout(0, false);
1011 }
1012
1013 int
1014 portal_group_set_filter(struct portal_group *pg, const char *str)
1015 {
1016         int filter;
1017
1018         if (strcmp(str, "none") == 0) {
1019                 filter = PG_FILTER_NONE;
1020         } else if (strcmp(str, "portal") == 0) {
1021                 filter = PG_FILTER_PORTAL;
1022         } else if (strcmp(str, "portal-name") == 0) {
1023                 filter = PG_FILTER_PORTAL_NAME;
1024         } else if (strcmp(str, "portal-name-auth") == 0) {
1025                 filter = PG_FILTER_PORTAL_NAME_AUTH;
1026         } else {
1027                 log_warnx("invalid discovery-filter \"%s\" for portal-group "
1028                     "\"%s\"; valid values are \"none\", \"portal\", "
1029                     "\"portal-name\", and \"portal-name-auth\"",
1030                     str, pg->pg_name);
1031                 return (1);
1032         }
1033
1034         if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN &&
1035             pg->pg_discovery_filter != filter) {
1036                 log_warnx("cannot set discovery-filter to \"%s\" for "
1037                     "portal-group \"%s\"; already has a different "
1038                     "value", str, pg->pg_name);
1039                 return (1);
1040         }
1041
1042         pg->pg_discovery_filter = filter;
1043
1044         return (0);
1045 }
1046
1047 int
1048 portal_group_set_offload(struct portal_group *pg, const char *offload)
1049 {
1050
1051         if (pg->pg_offload != NULL) {
1052                 log_warnx("cannot set offload to \"%s\" for "
1053                     "portal-group \"%s\"; already defined",
1054                     offload, pg->pg_name);
1055                 return (1);
1056         }
1057
1058         pg->pg_offload = checked_strdup(offload);
1059
1060         return (0);
1061 }
1062
1063 int
1064 portal_group_set_redirection(struct portal_group *pg, const char *addr)
1065 {
1066
1067         if (pg->pg_redirection != NULL) {
1068                 log_warnx("cannot set redirection to \"%s\" for "
1069                     "portal-group \"%s\"; already defined",
1070                     addr, pg->pg_name);
1071                 return (1);
1072         }
1073
1074         pg->pg_redirection = checked_strdup(addr);
1075
1076         return (0);
1077 }
1078
1079 static bool
1080 valid_hex(const char ch)
1081 {
1082         switch (ch) {
1083         case '0':
1084         case '1':
1085         case '2':
1086         case '3':
1087         case '4':
1088         case '5':
1089         case '6':
1090         case '7':
1091         case '8':
1092         case '9':
1093         case 'a':
1094         case 'A':
1095         case 'b':
1096         case 'B':
1097         case 'c':
1098         case 'C':
1099         case 'd':
1100         case 'D':
1101         case 'e':
1102         case 'E':
1103         case 'f':
1104         case 'F':
1105                 return (true);
1106         default:
1107                 return (false);
1108         }
1109 }
1110
1111 bool
1112 valid_iscsi_name(const char *name)
1113 {
1114         int i;
1115
1116         if (strlen(name) >= MAX_NAME_LEN) {
1117                 log_warnx("overlong name for target \"%s\"; max length allowed "
1118                     "by iSCSI specification is %d characters",
1119                     name, MAX_NAME_LEN);
1120                 return (false);
1121         }
1122
1123         /*
1124          * In the cases below, we don't return an error, just in case the admin
1125          * was right, and we're wrong.
1126          */
1127         if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) {
1128                 for (i = strlen("iqn."); name[i] != '\0'; i++) {
1129                         /*
1130                          * XXX: We should verify UTF-8 normalisation, as defined
1131                          *      by 3.2.6.2: iSCSI Name Encoding.
1132                          */
1133                         if (isalnum(name[i]))
1134                                 continue;
1135                         if (name[i] == '-' || name[i] == '.' || name[i] == ':')
1136                                 continue;
1137                         log_warnx("invalid character \"%c\" in target name "
1138                             "\"%s\"; allowed characters are letters, digits, "
1139                             "'-', '.', and ':'", name[i], name);
1140                         break;
1141                 }
1142                 /*
1143                  * XXX: Check more stuff: valid date and a valid reversed domain.
1144                  */
1145         } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) {
1146                 if (strlen(name) != strlen("eui.") + 16)
1147                         log_warnx("invalid target name \"%s\"; the \"eui.\" "
1148                             "should be followed by exactly 16 hexadecimal "
1149                             "digits", name);
1150                 for (i = strlen("eui."); name[i] != '\0'; i++) {
1151                         if (!valid_hex(name[i])) {
1152                                 log_warnx("invalid character \"%c\" in target "
1153                                     "name \"%s\"; allowed characters are 1-9 "
1154                                     "and A-F", name[i], name);
1155                                 break;
1156                         }
1157                 }
1158         } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) {
1159                 if (strlen(name) > strlen("naa.") + 32)
1160                         log_warnx("invalid target name \"%s\"; the \"naa.\" "
1161                             "should be followed by at most 32 hexadecimal "
1162                             "digits", name);
1163                 for (i = strlen("naa."); name[i] != '\0'; i++) {
1164                         if (!valid_hex(name[i])) {
1165                                 log_warnx("invalid character \"%c\" in target "
1166                                     "name \"%s\"; allowed characters are 1-9 "
1167                                     "and A-F", name[i], name);
1168                                 break;
1169                         }
1170                 }
1171         } else {
1172                 log_warnx("invalid target name \"%s\"; should start with "
1173                     "either \"iqn.\", \"eui.\", or \"naa.\"",
1174                     name);
1175         }
1176         return (true);
1177 }
1178
1179 struct pport *
1180 pport_new(struct conf *conf, const char *name, uint32_t ctl_port)
1181 {
1182         struct pport *pp;
1183
1184         pp = calloc(1, sizeof(*pp));
1185         if (pp == NULL)
1186                 log_err(1, "calloc");
1187         pp->pp_conf = conf;
1188         pp->pp_name = checked_strdup(name);
1189         pp->pp_ctl_port = ctl_port;
1190         TAILQ_INIT(&pp->pp_ports);
1191         TAILQ_INSERT_TAIL(&conf->conf_pports, pp, pp_next);
1192         return (pp);
1193 }
1194
1195 struct pport *
1196 pport_find(const struct conf *conf, const char *name)
1197 {
1198         struct pport *pp;
1199
1200         TAILQ_FOREACH(pp, &conf->conf_pports, pp_next) {
1201                 if (strcasecmp(pp->pp_name, name) == 0)
1202                         return (pp);
1203         }
1204         return (NULL);
1205 }
1206
1207 struct pport *
1208 pport_copy(struct pport *pp, struct conf *conf)
1209 {
1210         struct pport *ppnew;
1211
1212         ppnew = pport_new(conf, pp->pp_name, pp->pp_ctl_port);
1213         return (ppnew);
1214 }
1215
1216 void
1217 pport_delete(struct pport *pp)
1218 {
1219         struct port *port, *tport;
1220
1221         TAILQ_FOREACH_SAFE(port, &pp->pp_ports, p_ts, tport)
1222                 port_delete(port);
1223         TAILQ_REMOVE(&pp->pp_conf->conf_pports, pp, pp_next);
1224         free(pp->pp_name);
1225         free(pp);
1226 }
1227
1228 struct port *
1229 port_new(struct conf *conf, struct target *target, struct portal_group *pg)
1230 {
1231         struct port *port;
1232         char *name;
1233         int ret;
1234
1235         ret = asprintf(&name, "%s-%s", pg->pg_name, target->t_name);
1236         if (ret <= 0)
1237                 log_err(1, "asprintf");
1238         if (port_find(conf, name) != NULL) {
1239                 log_warnx("duplicate port \"%s\"", name);
1240                 free(name);
1241                 return (NULL);
1242         }
1243         port = calloc(1, sizeof(*port));
1244         if (port == NULL)
1245                 log_err(1, "calloc");
1246         port->p_conf = conf;
1247         port->p_name = name;
1248         port->p_ioctl_port = 0;
1249         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1250         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1251         port->p_target = target;
1252         TAILQ_INSERT_TAIL(&pg->pg_ports, port, p_pgs);
1253         port->p_portal_group = pg;
1254         return (port);
1255 }
1256
1257 struct port *
1258 port_new_ioctl(struct conf *conf, struct target *target, int pp, int vp)
1259 {
1260         struct pport *pport;
1261         struct port *port;
1262         char *pname;
1263         char *name;
1264         int ret;
1265
1266         ret = asprintf(&pname, "ioctl/%d/%d", pp, vp);
1267         if (ret <= 0) {
1268                 log_err(1, "asprintf");
1269                 return (NULL);
1270         }
1271
1272         pport = pport_find(conf, pname);
1273         if (pport != NULL) {
1274                 free(pname);
1275                 return (port_new_pp(conf, target, pport));
1276         }
1277
1278         ret = asprintf(&name, "%s-%s", pname, target->t_name);
1279         free(pname);
1280
1281         if (ret <= 0)
1282                 log_err(1, "asprintf");
1283         if (port_find(conf, name) != NULL) {
1284                 log_warnx("duplicate port \"%s\"", name);
1285                 free(name);
1286                 return (NULL);
1287         }
1288         port = calloc(1, sizeof(*port));
1289         if (port == NULL)
1290                 log_err(1, "calloc");
1291         port->p_conf = conf;
1292         port->p_name = name;
1293         port->p_ioctl_port = 1;
1294         port->p_ioctl_pp = pp;
1295         port->p_ioctl_vp = vp;
1296         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1297         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1298         port->p_target = target;
1299         return (port);
1300 }
1301
1302 struct port *
1303 port_new_pp(struct conf *conf, struct target *target, struct pport *pp)
1304 {
1305         struct port *port;
1306         char *name;
1307         int ret;
1308
1309         ret = asprintf(&name, "%s-%s", pp->pp_name, target->t_name);
1310         if (ret <= 0)
1311                 log_err(1, "asprintf");
1312         if (port_find(conf, name) != NULL) {
1313                 log_warnx("duplicate port \"%s\"", name);
1314                 free(name);
1315                 return (NULL);
1316         }
1317         port = calloc(1, sizeof(*port));
1318         if (port == NULL)
1319                 log_err(1, "calloc");
1320         port->p_conf = conf;
1321         port->p_name = name;
1322         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1323         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1324         port->p_target = target;
1325         TAILQ_INSERT_TAIL(&pp->pp_ports, port, p_pps);
1326         port->p_pport = pp;
1327         return (port);
1328 }
1329
1330 struct port *
1331 port_find(const struct conf *conf, const char *name)
1332 {
1333         struct port *port;
1334
1335         TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1336                 if (strcasecmp(port->p_name, name) == 0)
1337                         return (port);
1338         }
1339
1340         return (NULL);
1341 }
1342
1343 struct port *
1344 port_find_in_pg(const struct portal_group *pg, const char *target)
1345 {
1346         struct port *port;
1347
1348         TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) {
1349                 if (strcasecmp(port->p_target->t_name, target) == 0)
1350                         return (port);
1351         }
1352
1353         return (NULL);
1354 }
1355
1356 void
1357 port_delete(struct port *port)
1358 {
1359
1360         if (port->p_portal_group)
1361                 TAILQ_REMOVE(&port->p_portal_group->pg_ports, port, p_pgs);
1362         if (port->p_pport)
1363                 TAILQ_REMOVE(&port->p_pport->pp_ports, port, p_pps);
1364         if (port->p_target)
1365                 TAILQ_REMOVE(&port->p_target->t_ports, port, p_ts);
1366         TAILQ_REMOVE(&port->p_conf->conf_ports, port, p_next);
1367         free(port->p_name);
1368         free(port);
1369 }
1370
1371 int
1372 port_is_dummy(struct port *port)
1373 {
1374
1375         if (port->p_portal_group) {
1376                 if (port->p_portal_group->pg_foreign)
1377                         return (1);
1378                 if (TAILQ_EMPTY(&port->p_portal_group->pg_portals))
1379                         return (1);
1380         }
1381         return (0);
1382 }
1383
1384 struct target *
1385 target_new(struct conf *conf, const char *name)
1386 {
1387         struct target *targ;
1388         int i, len;
1389
1390         targ = target_find(conf, name);
1391         if (targ != NULL) {
1392                 log_warnx("duplicated target \"%s\"", name);
1393                 return (NULL);
1394         }
1395         if (valid_iscsi_name(name) == false) {
1396                 log_warnx("target name \"%s\" is invalid", name);
1397                 return (NULL);
1398         }
1399         targ = calloc(1, sizeof(*targ));
1400         if (targ == NULL)
1401                 log_err(1, "calloc");
1402         targ->t_name = checked_strdup(name);
1403
1404         /*
1405          * RFC 3722 requires us to normalize the name to lowercase.
1406          */
1407         len = strlen(name);
1408         for (i = 0; i < len; i++)
1409                 targ->t_name[i] = tolower(targ->t_name[i]);
1410
1411         targ->t_conf = conf;
1412         TAILQ_INIT(&targ->t_ports);
1413         TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next);
1414
1415         return (targ);
1416 }
1417
1418 void
1419 target_delete(struct target *targ)
1420 {
1421         struct port *port, *tport;
1422
1423         TAILQ_FOREACH_SAFE(port, &targ->t_ports, p_ts, tport)
1424                 port_delete(port);
1425         TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next);
1426
1427         free(targ->t_name);
1428         free(targ->t_redirection);
1429         free(targ);
1430 }
1431
1432 struct target *
1433 target_find(struct conf *conf, const char *name)
1434 {
1435         struct target *targ;
1436
1437         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1438                 if (strcasecmp(targ->t_name, name) == 0)
1439                         return (targ);
1440         }
1441
1442         return (NULL);
1443 }
1444
1445 int
1446 target_set_redirection(struct target *target, const char *addr)
1447 {
1448
1449         if (target->t_redirection != NULL) {
1450                 log_warnx("cannot set redirection to \"%s\" for "
1451                     "target \"%s\"; already defined",
1452                     addr, target->t_name);
1453                 return (1);
1454         }
1455
1456         target->t_redirection = checked_strdup(addr);
1457
1458         return (0);
1459 }
1460
1461 struct lun *
1462 lun_new(struct conf *conf, const char *name)
1463 {
1464         struct lun *lun;
1465
1466         lun = lun_find(conf, name);
1467         if (lun != NULL) {
1468                 log_warnx("duplicated lun \"%s\"", name);
1469                 return (NULL);
1470         }
1471
1472         lun = calloc(1, sizeof(*lun));
1473         if (lun == NULL)
1474                 log_err(1, "calloc");
1475         lun->l_conf = conf;
1476         lun->l_name = checked_strdup(name);
1477         TAILQ_INIT(&lun->l_options);
1478         TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next);
1479         lun->l_ctl_lun = -1;
1480
1481         return (lun);
1482 }
1483
1484 void
1485 lun_delete(struct lun *lun)
1486 {
1487         struct target *targ;
1488         struct option *o, *tmp;
1489         int i;
1490
1491         TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) {
1492                 for (i = 0; i < MAX_LUNS; i++) {
1493                         if (targ->t_luns[i] == lun)
1494                                 targ->t_luns[i] = NULL;
1495                 }
1496         }
1497         TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next);
1498
1499         TAILQ_FOREACH_SAFE(o, &lun->l_options, o_next, tmp)
1500                 option_delete(&lun->l_options, o);
1501         free(lun->l_name);
1502         free(lun->l_backend);
1503         free(lun->l_device_id);
1504         free(lun->l_path);
1505         free(lun->l_scsiname);
1506         free(lun->l_serial);
1507         free(lun);
1508 }
1509
1510 struct lun *
1511 lun_find(const struct conf *conf, const char *name)
1512 {
1513         struct lun *lun;
1514
1515         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1516                 if (strcmp(lun->l_name, name) == 0)
1517                         return (lun);
1518         }
1519
1520         return (NULL);
1521 }
1522
1523 void
1524 lun_set_backend(struct lun *lun, const char *value)
1525 {
1526         free(lun->l_backend);
1527         lun->l_backend = checked_strdup(value);
1528 }
1529
1530 void
1531 lun_set_blocksize(struct lun *lun, size_t value)
1532 {
1533
1534         lun->l_blocksize = value;
1535 }
1536
1537 void
1538 lun_set_device_type(struct lun *lun, uint8_t value)
1539 {
1540
1541         lun->l_device_type = value;
1542 }
1543
1544 void
1545 lun_set_device_id(struct lun *lun, const char *value)
1546 {
1547         free(lun->l_device_id);
1548         lun->l_device_id = checked_strdup(value);
1549 }
1550
1551 void
1552 lun_set_path(struct lun *lun, const char *value)
1553 {
1554         free(lun->l_path);
1555         lun->l_path = checked_strdup(value);
1556 }
1557
1558 void
1559 lun_set_scsiname(struct lun *lun, const char *value)
1560 {
1561         free(lun->l_scsiname);
1562         lun->l_scsiname = checked_strdup(value);
1563 }
1564
1565 void
1566 lun_set_serial(struct lun *lun, const char *value)
1567 {
1568         free(lun->l_serial);
1569         lun->l_serial = checked_strdup(value);
1570 }
1571
1572 void
1573 lun_set_size(struct lun *lun, size_t value)
1574 {
1575
1576         lun->l_size = value;
1577 }
1578
1579 void
1580 lun_set_ctl_lun(struct lun *lun, uint32_t value)
1581 {
1582
1583         lun->l_ctl_lun = value;
1584 }
1585
1586 struct option *
1587 option_new(struct options *options, const char *name, const char *value)
1588 {
1589         struct option *o;
1590
1591         o = option_find(options, name);
1592         if (o != NULL) {
1593                 log_warnx("duplicated option \"%s\"", name);
1594                 return (NULL);
1595         }
1596
1597         o = calloc(1, sizeof(*o));
1598         if (o == NULL)
1599                 log_err(1, "calloc");
1600         o->o_name = checked_strdup(name);
1601         o->o_value = checked_strdup(value);
1602         TAILQ_INSERT_TAIL(options, o, o_next);
1603
1604         return (o);
1605 }
1606
1607 void
1608 option_delete(struct options *options, struct option *o)
1609 {
1610
1611         TAILQ_REMOVE(options, o, o_next);
1612         free(o->o_name);
1613         free(o->o_value);
1614         free(o);
1615 }
1616
1617 struct option *
1618 option_find(const struct options *options, const char *name)
1619 {
1620         struct option *o;
1621
1622         TAILQ_FOREACH(o, options, o_next) {
1623                 if (strcmp(o->o_name, name) == 0)
1624                         return (o);
1625         }
1626
1627         return (NULL);
1628 }
1629
1630 void
1631 option_set(struct option *o, const char *value)
1632 {
1633
1634         free(o->o_value);
1635         o->o_value = checked_strdup(value);
1636 }
1637
1638 #ifdef ICL_KERNEL_PROXY
1639
1640 static void
1641 pdu_receive_proxy(struct pdu *pdu)
1642 {
1643         struct connection *conn;
1644         size_t len;
1645
1646         assert(proxy_mode);
1647         conn = pdu->pdu_connection;
1648
1649         kernel_receive(pdu);
1650
1651         len = pdu_ahs_length(pdu);
1652         if (len > 0)
1653                 log_errx(1, "protocol error: non-empty AHS");
1654
1655         len = pdu_data_segment_length(pdu);
1656         assert(len <= (size_t)conn->conn_max_recv_data_segment_length);
1657         pdu->pdu_data_len = len;
1658 }
1659
1660 static void
1661 pdu_send_proxy(struct pdu *pdu)
1662 {
1663
1664         assert(proxy_mode);
1665
1666         pdu_set_data_segment_length(pdu, pdu->pdu_data_len);
1667         kernel_send(pdu);
1668 }
1669
1670 #endif /* ICL_KERNEL_PROXY */
1671
1672 static void
1673 pdu_fail(const struct connection *conn __unused, const char *reason __unused)
1674 {
1675 }
1676
1677 static struct ctld_connection *
1678 connection_new(struct portal *portal, int fd, const char *host,
1679     const struct sockaddr *client_sa)
1680 {
1681         struct ctld_connection *conn;
1682
1683         conn = calloc(1, sizeof(*conn));
1684         if (conn == NULL)
1685                 log_err(1, "calloc");
1686         connection_init(&conn->conn, &conn_ops, proxy_mode);
1687         conn->conn.conn_socket = fd;
1688         conn->conn_portal = portal;
1689         conn->conn_initiator_addr = checked_strdup(host);
1690         memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len);
1691
1692         return (conn);
1693 }
1694
1695 #if 0
1696 static void
1697 conf_print(struct conf *conf)
1698 {
1699         struct auth_group *ag;
1700         struct auth *auth;
1701         struct auth_name *auth_name;
1702         struct auth_portal *auth_portal;
1703         struct portal_group *pg;
1704         struct portal *portal;
1705         struct target *targ;
1706         struct lun *lun;
1707         struct option *o;
1708
1709         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1710                 fprintf(stderr, "auth-group %s {\n", ag->ag_name);
1711                 TAILQ_FOREACH(auth, &ag->ag_auths, a_next)
1712                         fprintf(stderr, "\t chap-mutual %s %s %s %s\n",
1713                             auth->a_user, auth->a_secret,
1714                             auth->a_mutual_user, auth->a_mutual_secret);
1715                 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next)
1716                         fprintf(stderr, "\t initiator-name %s\n",
1717                             auth_name->an_initiator_name);
1718                 TAILQ_FOREACH(auth_portal, &ag->ag_portals, ap_next)
1719                         fprintf(stderr, "\t initiator-portal %s\n",
1720                             auth_portal->ap_initiator_portal);
1721                 fprintf(stderr, "}\n");
1722         }
1723         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1724                 fprintf(stderr, "portal-group %s {\n", pg->pg_name);
1725                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
1726                         fprintf(stderr, "\t listen %s\n", portal->p_listen);
1727                 fprintf(stderr, "}\n");
1728         }
1729         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1730                 fprintf(stderr, "\tlun %s {\n", lun->l_name);
1731                 fprintf(stderr, "\t\tpath %s\n", lun->l_path);
1732                 TAILQ_FOREACH(o, &lun->l_options, o_next)
1733                         fprintf(stderr, "\t\toption %s %s\n",
1734                             o->o_name, o->o_value);
1735                 fprintf(stderr, "\t}\n");
1736         }
1737         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1738                 fprintf(stderr, "target %s {\n", targ->t_name);
1739                 if (targ->t_alias != NULL)
1740                         fprintf(stderr, "\t alias %s\n", targ->t_alias);
1741                 fprintf(stderr, "}\n");
1742         }
1743 }
1744 #endif
1745
1746 static int
1747 conf_verify_lun(struct lun *lun)
1748 {
1749         const struct lun *lun2;
1750
1751         if (lun->l_backend == NULL)
1752                 lun_set_backend(lun, "block");
1753         if (strcmp(lun->l_backend, "block") == 0) {
1754                 if (lun->l_path == NULL) {
1755                         log_warnx("missing path for lun \"%s\"",
1756                             lun->l_name);
1757                         return (1);
1758                 }
1759         } else if (strcmp(lun->l_backend, "ramdisk") == 0) {
1760                 if (lun->l_size == 0) {
1761                         log_warnx("missing size for ramdisk-backed lun \"%s\"",
1762                             lun->l_name);
1763                         return (1);
1764                 }
1765                 if (lun->l_path != NULL) {
1766                         log_warnx("path must not be specified "
1767                             "for ramdisk-backed lun \"%s\"",
1768                             lun->l_name);
1769                         return (1);
1770                 }
1771         }
1772         if (lun->l_blocksize == 0) {
1773                 if (lun->l_device_type == 5)
1774                         lun_set_blocksize(lun, DEFAULT_CD_BLOCKSIZE);
1775                 else
1776                         lun_set_blocksize(lun, DEFAULT_BLOCKSIZE);
1777         } else if (lun->l_blocksize < 0) {
1778                 log_warnx("invalid blocksize for lun \"%s\"; "
1779                     "must be larger than 0", lun->l_name);
1780                 return (1);
1781         }
1782         if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) {
1783                 log_warnx("invalid size for lun \"%s\"; "
1784                     "must be multiple of blocksize", lun->l_name);
1785                 return (1);
1786         }
1787         TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) {
1788                 if (lun == lun2)
1789                         continue;
1790                 if (lun->l_path != NULL && lun2->l_path != NULL &&
1791                     strcmp(lun->l_path, lun2->l_path) == 0) {
1792                         log_debugx("WARNING: path \"%s\" duplicated "
1793                             "between lun \"%s\", and "
1794                             "lun \"%s\"", lun->l_path,
1795                             lun->l_name, lun2->l_name);
1796                 }
1797         }
1798
1799         return (0);
1800 }
1801
1802 int
1803 conf_verify(struct conf *conf)
1804 {
1805         struct auth_group *ag;
1806         struct portal_group *pg;
1807         struct port *port;
1808         struct target *targ;
1809         struct lun *lun;
1810         bool found;
1811         int error, i;
1812
1813         if (conf->conf_pidfile_path == NULL)
1814                 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE);
1815
1816         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1817                 error = conf_verify_lun(lun);
1818                 if (error != 0)
1819                         return (error);
1820         }
1821         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1822                 if (targ->t_auth_group == NULL) {
1823                         targ->t_auth_group = auth_group_find(conf,
1824                             "default");
1825                         assert(targ->t_auth_group != NULL);
1826                 }
1827                 if (TAILQ_EMPTY(&targ->t_ports)) {
1828                         pg = portal_group_find(conf, "default");
1829                         assert(pg != NULL);
1830                         port_new(conf, targ, pg);
1831                 }
1832                 found = false;
1833                 for (i = 0; i < MAX_LUNS; i++) {
1834                         if (targ->t_luns[i] != NULL)
1835                                 found = true;
1836                 }
1837                 if (!found && targ->t_redirection == NULL) {
1838                         log_warnx("no LUNs defined for target \"%s\"",
1839                             targ->t_name);
1840                 }
1841                 if (found && targ->t_redirection != NULL) {
1842                         log_debugx("target \"%s\" contains luns, "
1843                             " but configured for redirection",
1844                             targ->t_name);
1845                 }
1846         }
1847         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1848                 assert(pg->pg_name != NULL);
1849                 if (pg->pg_discovery_auth_group == NULL) {
1850                         pg->pg_discovery_auth_group =
1851                             auth_group_find(conf, "default");
1852                         assert(pg->pg_discovery_auth_group != NULL);
1853                 }
1854
1855                 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN)
1856                         pg->pg_discovery_filter = PG_FILTER_NONE;
1857
1858                 if (pg->pg_redirection != NULL) {
1859                         if (!TAILQ_EMPTY(&pg->pg_ports)) {
1860                                 log_debugx("portal-group \"%s\" assigned "
1861                                     "to target, but configured "
1862                                     "for redirection",
1863                                     pg->pg_name);
1864                         }
1865                         pg->pg_unassigned = false;
1866                 } else if (!TAILQ_EMPTY(&pg->pg_ports)) {
1867                         pg->pg_unassigned = false;
1868                 } else {
1869                         if (strcmp(pg->pg_name, "default") != 0)
1870                                 log_warnx("portal-group \"%s\" not assigned "
1871                                     "to any target", pg->pg_name);
1872                         pg->pg_unassigned = true;
1873                 }
1874         }
1875         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1876                 if (ag->ag_name == NULL)
1877                         assert(ag->ag_target != NULL);
1878                 else
1879                         assert(ag->ag_target == NULL);
1880
1881                 found = false;
1882                 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1883                         if (targ->t_auth_group == ag) {
1884                                 found = true;
1885                                 break;
1886                         }
1887                 }
1888                 TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1889                         if (port->p_auth_group == ag) {
1890                                 found = true;
1891                                 break;
1892                         }
1893                 }
1894                 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1895                         if (pg->pg_discovery_auth_group == ag) {
1896                                 found = true;
1897                                 break;
1898                         }
1899                 }
1900                 if (!found && ag->ag_name != NULL &&
1901                     strcmp(ag->ag_name, "default") != 0 &&
1902                     strcmp(ag->ag_name, "no-authentication") != 0 &&
1903                     strcmp(ag->ag_name, "no-access") != 0) {
1904                         log_warnx("auth-group \"%s\" not assigned "
1905                             "to any target", ag->ag_name);
1906                 }
1907         }
1908
1909         return (0);
1910 }
1911
1912 static int
1913 conf_apply(struct conf *oldconf, struct conf *newconf)
1914 {
1915         struct lun *oldlun, *newlun, *tmplun;
1916         struct portal_group *oldpg, *newpg;
1917         struct portal *oldp, *newp;
1918         struct port *oldport, *newport, *tmpport;
1919         struct isns *oldns, *newns;
1920         pid_t otherpid;
1921         int changed, cumulated_error = 0, error, sockbuf;
1922         int one = 1;
1923
1924         if (oldconf->conf_debug != newconf->conf_debug) {
1925                 log_debugx("changing debug level to %d", newconf->conf_debug);
1926                 log_init(newconf->conf_debug);
1927         }
1928
1929         if (oldconf->conf_pidfh != NULL) {
1930                 assert(oldconf->conf_pidfile_path != NULL);
1931                 if (newconf->conf_pidfile_path != NULL &&
1932                     strcmp(oldconf->conf_pidfile_path,
1933                     newconf->conf_pidfile_path) == 0) {
1934                         newconf->conf_pidfh = oldconf->conf_pidfh;
1935                         oldconf->conf_pidfh = NULL;
1936                 } else {
1937                         log_debugx("removing pidfile %s",
1938                             oldconf->conf_pidfile_path);
1939                         pidfile_remove(oldconf->conf_pidfh);
1940                         oldconf->conf_pidfh = NULL;
1941                 }
1942         }
1943
1944         if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) {
1945                 log_debugx("opening pidfile %s", newconf->conf_pidfile_path);
1946                 newconf->conf_pidfh =
1947                     pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid);
1948                 if (newconf->conf_pidfh == NULL) {
1949                         if (errno == EEXIST)
1950                                 log_errx(1, "daemon already running, pid: %jd.",
1951                                     (intmax_t)otherpid);
1952                         log_err(1, "cannot open or create pidfile \"%s\"",
1953                             newconf->conf_pidfile_path);
1954                 }
1955         }
1956
1957         /*
1958          * Go through the new portal groups, assigning tags or preserving old.
1959          */
1960         TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
1961                 if (newpg->pg_tag != 0)
1962                         continue;
1963                 oldpg = portal_group_find(oldconf, newpg->pg_name);
1964                 if (oldpg != NULL)
1965                         newpg->pg_tag = oldpg->pg_tag;
1966                 else
1967                         newpg->pg_tag = ++last_portal_group_tag;
1968         }
1969
1970         /* Deregister on removed iSNS servers. */
1971         TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
1972                 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
1973                         if (strcmp(oldns->i_addr, newns->i_addr) == 0)
1974                                 break;
1975                 }
1976                 if (newns == NULL)
1977                         isns_deregister(oldns);
1978         }
1979
1980         /*
1981          * XXX: If target or lun removal fails, we should somehow "move"
1982          *      the old lun or target into newconf, so that subsequent
1983          *      conf_apply() would try to remove them again.  That would
1984          *      be somewhat hairy, though, and lun deletion failures don't
1985          *      really happen, so leave it as it is for now.
1986          */
1987         /*
1988          * First, remove any ports present in the old configuration
1989          * and missing in the new one.
1990          */
1991         TAILQ_FOREACH_SAFE(oldport, &oldconf->conf_ports, p_next, tmpport) {
1992                 if (port_is_dummy(oldport))
1993                         continue;
1994                 newport = port_find(newconf, oldport->p_name);
1995                 if (newport != NULL && !port_is_dummy(newport))
1996                         continue;
1997                 log_debugx("removing port \"%s\"", oldport->p_name);
1998                 error = kernel_port_remove(oldport);
1999                 if (error != 0) {
2000                         log_warnx("failed to remove port %s",
2001                             oldport->p_name);
2002                         /*
2003                          * XXX: Uncomment after fixing the root cause.
2004                          *
2005                          * cumulated_error++;
2006                          */
2007                 }
2008         }
2009
2010         /*
2011          * Second, remove any LUNs present in the old configuration
2012          * and missing in the new one.
2013          */
2014         TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) {
2015                 newlun = lun_find(newconf, oldlun->l_name);
2016                 if (newlun == NULL) {
2017                         log_debugx("lun \"%s\", CTL lun %d "
2018                             "not found in new configuration; "
2019                             "removing", oldlun->l_name, oldlun->l_ctl_lun);
2020                         error = kernel_lun_remove(oldlun);
2021                         if (error != 0) {
2022                                 log_warnx("failed to remove lun \"%s\", "
2023                                     "CTL lun %d",
2024                                     oldlun->l_name, oldlun->l_ctl_lun);
2025                                 cumulated_error++;
2026                         }
2027                         continue;
2028                 }
2029
2030                 /*
2031                  * Also remove the LUNs changed by more than size.
2032                  */
2033                 changed = 0;
2034                 assert(oldlun->l_backend != NULL);
2035                 assert(newlun->l_backend != NULL);
2036                 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) {
2037                         log_debugx("backend for lun \"%s\", "
2038                             "CTL lun %d changed; removing",
2039                             oldlun->l_name, oldlun->l_ctl_lun);
2040                         changed = 1;
2041                 }
2042                 if (oldlun->l_blocksize != newlun->l_blocksize) {
2043                         log_debugx("blocksize for lun \"%s\", "
2044                             "CTL lun %d changed; removing",
2045                             oldlun->l_name, oldlun->l_ctl_lun);
2046                         changed = 1;
2047                 }
2048                 if (newlun->l_device_id != NULL &&
2049                     (oldlun->l_device_id == NULL ||
2050                      strcmp(oldlun->l_device_id, newlun->l_device_id) !=
2051                      0)) {
2052                         log_debugx("device-id for lun \"%s\", "
2053                             "CTL lun %d changed; removing",
2054                             oldlun->l_name, oldlun->l_ctl_lun);
2055                         changed = 1;
2056                 }
2057                 if (newlun->l_path != NULL &&
2058                     (oldlun->l_path == NULL ||
2059                      strcmp(oldlun->l_path, newlun->l_path) != 0)) {
2060                         log_debugx("path for lun \"%s\", "
2061                             "CTL lun %d, changed; removing",
2062                             oldlun->l_name, oldlun->l_ctl_lun);
2063                         changed = 1;
2064                 }
2065                 if (newlun->l_serial != NULL &&
2066                     (oldlun->l_serial == NULL ||
2067                      strcmp(oldlun->l_serial, newlun->l_serial) != 0)) {
2068                         log_debugx("serial for lun \"%s\", "
2069                             "CTL lun %d changed; removing",
2070                             oldlun->l_name, oldlun->l_ctl_lun);
2071                         changed = 1;
2072                 }
2073                 if (changed) {
2074                         error = kernel_lun_remove(oldlun);
2075                         if (error != 0) {
2076                                 log_warnx("failed to remove lun \"%s\", "
2077                                     "CTL lun %d",
2078                                     oldlun->l_name, oldlun->l_ctl_lun);
2079                                 cumulated_error++;
2080                         }
2081                         lun_delete(oldlun);
2082                         continue;
2083                 }
2084
2085                 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun);
2086         }
2087
2088         TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) {
2089                 oldlun = lun_find(oldconf, newlun->l_name);
2090                 if (oldlun != NULL) {
2091                         log_debugx("modifying lun \"%s\", CTL lun %d",
2092                             newlun->l_name, newlun->l_ctl_lun);
2093                         error = kernel_lun_modify(newlun);
2094                         if (error != 0) {
2095                                 log_warnx("failed to "
2096                                     "modify lun \"%s\", CTL lun %d",
2097                                     newlun->l_name, newlun->l_ctl_lun);
2098                                 cumulated_error++;
2099                         }
2100                         continue;
2101                 }
2102                 log_debugx("adding lun \"%s\"", newlun->l_name);
2103                 error = kernel_lun_add(newlun);
2104                 if (error != 0) {
2105                         log_warnx("failed to add lun \"%s\"", newlun->l_name);
2106                         lun_delete(newlun);
2107                         cumulated_error++;
2108                 }
2109         }
2110
2111         /*
2112          * Now add new ports or modify existing ones.
2113          */
2114         TAILQ_FOREACH_SAFE(newport, &newconf->conf_ports, p_next, tmpport) {
2115                 if (port_is_dummy(newport))
2116                         continue;
2117                 oldport = port_find(oldconf, newport->p_name);
2118
2119                 if (oldport == NULL || port_is_dummy(oldport)) {
2120                         log_debugx("adding port \"%s\"", newport->p_name);
2121                         error = kernel_port_add(newport);
2122                 } else {
2123                         log_debugx("updating port \"%s\"", newport->p_name);
2124                         newport->p_ctl_port = oldport->p_ctl_port;
2125                         error = kernel_port_update(newport, oldport);
2126                 }
2127                 if (error != 0) {
2128                         log_warnx("failed to %s port %s",
2129                             (oldport == NULL) ? "add" : "update",
2130                             newport->p_name);
2131                         if (oldport == NULL || port_is_dummy(oldport))
2132                                 port_delete(newport);
2133                         /*
2134                          * XXX: Uncomment after fixing the root cause.
2135                          *
2136                          * cumulated_error++;
2137                          */
2138                 }
2139         }
2140
2141         /*
2142          * Go through the new portals, opening the sockets as necessary.
2143          */
2144         TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
2145                 if (newpg->pg_foreign)
2146                         continue;
2147                 if (newpg->pg_unassigned) {
2148                         log_debugx("not listening on portal-group \"%s\", "
2149                             "not assigned to any target",
2150                             newpg->pg_name);
2151                         continue;
2152                 }
2153                 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) {
2154                         /*
2155                          * Try to find already open portal and reuse
2156                          * the listening socket.  We don't care about
2157                          * what portal or portal group that was, what
2158                          * matters is the listening address.
2159                          */
2160                         TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups,
2161                             pg_next) {
2162                                 TAILQ_FOREACH(oldp, &oldpg->pg_portals,
2163                                     p_next) {
2164                                         if (strcmp(newp->p_listen,
2165                                             oldp->p_listen) == 0 &&
2166                                             oldp->p_socket > 0) {
2167                                                 newp->p_socket =
2168                                                     oldp->p_socket;
2169                                                 oldp->p_socket = 0;
2170                                                 break;
2171                                         }
2172                                 }
2173                         }
2174                         if (newp->p_socket > 0) {
2175                                 /*
2176                                  * We're done with this portal.
2177                                  */
2178                                 continue;
2179                         }
2180
2181 #ifdef ICL_KERNEL_PROXY
2182                         if (proxy_mode) {
2183                                 newpg->pg_conf->conf_portal_id++;
2184                                 newp->p_id = newpg->pg_conf->conf_portal_id;
2185                                 log_debugx("listening on %s, portal-group "
2186                                     "\"%s\", portal id %d, using ICL proxy",
2187                                     newp->p_listen, newpg->pg_name, newp->p_id);
2188                                 kernel_listen(newp->p_ai, newp->p_iser,
2189                                     newp->p_id);
2190                                 continue;
2191                         }
2192 #endif
2193                         assert(proxy_mode == false);
2194                         assert(newp->p_iser == false);
2195
2196                         log_debugx("listening on %s, portal-group \"%s\"",
2197                             newp->p_listen, newpg->pg_name);
2198                         newp->p_socket = socket(newp->p_ai->ai_family,
2199                             newp->p_ai->ai_socktype,
2200                             newp->p_ai->ai_protocol);
2201                         if (newp->p_socket < 0) {
2202                                 log_warn("socket(2) failed for %s",
2203                                     newp->p_listen);
2204                                 cumulated_error++;
2205                                 continue;
2206                         }
2207                         sockbuf = SOCKBUF_SIZE;
2208                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF,
2209                             &sockbuf, sizeof(sockbuf)) == -1)
2210                                 log_warn("setsockopt(SO_RCVBUF) failed "
2211                                     "for %s", newp->p_listen);
2212                         sockbuf = SOCKBUF_SIZE;
2213                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF,
2214                             &sockbuf, sizeof(sockbuf)) == -1)
2215                                 log_warn("setsockopt(SO_SNDBUF) failed "
2216                                     "for %s", newp->p_listen);
2217                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_NO_DDP,
2218                             &one, sizeof(one)) == -1)
2219                                 log_warn("setsockopt(SO_NO_DDP) failed "
2220                                     "for %s", newp->p_listen);
2221                         error = setsockopt(newp->p_socket, SOL_SOCKET,
2222                             SO_REUSEADDR, &one, sizeof(one));
2223                         if (error != 0) {
2224                                 log_warn("setsockopt(SO_REUSEADDR) failed "
2225                                     "for %s", newp->p_listen);
2226                                 close(newp->p_socket);
2227                                 newp->p_socket = 0;
2228                                 cumulated_error++;
2229                                 continue;
2230                         }
2231                         if (newpg->pg_dscp != -1) {
2232                                 struct sockaddr sa;
2233                                 int len = sizeof(sa);
2234                                 getsockname(newp->p_socket, &sa, &len);
2235                                 /*
2236                                  * Only allow the 6-bit DSCP
2237                                  * field to be modified
2238                                  */
2239                                 int tos = newpg->pg_dscp << 2;
2240                                 if (sa.sa_family == AF_INET) {
2241                                         if (setsockopt(newp->p_socket,
2242                                             IPPROTO_IP, IP_TOS,
2243                                             &tos, sizeof(tos)) == -1)
2244                                                 log_warn("setsockopt(IP_TOS) "
2245                                                     "failed for %s",
2246                                                     newp->p_listen);
2247                                 } else
2248                                 if (sa.sa_family == AF_INET6) {
2249                                         if (setsockopt(newp->p_socket,
2250                                             IPPROTO_IPV6, IPV6_TCLASS,
2251                                             &tos, sizeof(tos)) == -1)
2252                                                 log_warn("setsockopt(IPV6_TCLASS) "
2253                                                     "failed for %s",
2254                                                     newp->p_listen);
2255                                 }
2256                         }
2257                         if (newpg->pg_pcp != -1) {
2258                                 struct sockaddr sa;
2259                                 int len = sizeof(sa);
2260                                 getsockname(newp->p_socket, &sa, &len);
2261                                 /*
2262                                  * Only allow the 6-bit DSCP
2263                                  * field to be modified
2264                                  */
2265                                 int pcp = newpg->pg_pcp;
2266                                 if (sa.sa_family == AF_INET) {
2267                                         if (setsockopt(newp->p_socket,
2268                                             IPPROTO_IP, IP_VLAN_PCP,
2269                                             &pcp, sizeof(pcp)) == -1)
2270                                                 log_warn("setsockopt(IP_VLAN_PCP) "
2271                                                     "failed for %s",
2272                                                     newp->p_listen);
2273                                 } else
2274                                 if (sa.sa_family == AF_INET6) {
2275                                         if (setsockopt(newp->p_socket,
2276                                             IPPROTO_IPV6, IPV6_VLAN_PCP,
2277                                             &pcp, sizeof(pcp)) == -1)
2278                                                 log_warn("setsockopt(IPV6_VLAN_PCP) "
2279                                                     "failed for %s",
2280                                                     newp->p_listen);
2281                                 }
2282                         }
2283                         error = bind(newp->p_socket, newp->p_ai->ai_addr,
2284                             newp->p_ai->ai_addrlen);
2285                         if (error != 0) {
2286                                 log_warn("bind(2) failed for %s",
2287                                     newp->p_listen);
2288                                 close(newp->p_socket);
2289                                 newp->p_socket = 0;
2290                                 cumulated_error++;
2291                                 continue;
2292                         }
2293                         error = listen(newp->p_socket, -1);
2294                         if (error != 0) {
2295                                 log_warn("listen(2) failed for %s",
2296                                     newp->p_listen);
2297                                 close(newp->p_socket);
2298                                 newp->p_socket = 0;
2299                                 cumulated_error++;
2300                                 continue;
2301                         }
2302                 }
2303         }
2304
2305         /*
2306          * Go through the no longer used sockets, closing them.
2307          */
2308         TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) {
2309                 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) {
2310                         if (oldp->p_socket <= 0)
2311                                 continue;
2312                         log_debugx("closing socket for %s, portal-group \"%s\"",
2313                             oldp->p_listen, oldpg->pg_name);
2314                         close(oldp->p_socket);
2315                         oldp->p_socket = 0;
2316                 }
2317         }
2318
2319         /* (Re-)Register on remaining/new iSNS servers. */
2320         TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
2321                 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
2322                         if (strcmp(oldns->i_addr, newns->i_addr) == 0)
2323                                 break;
2324                 }
2325                 isns_register(newns, oldns);
2326         }
2327
2328         /* Schedule iSNS update */
2329         if (!TAILQ_EMPTY(&newconf->conf_isns))
2330                 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2331
2332         return (cumulated_error);
2333 }
2334
2335 static bool
2336 timed_out(void)
2337 {
2338
2339         return (sigalrm_received);
2340 }
2341
2342 static void
2343 sigalrm_handler_fatal(int dummy __unused)
2344 {
2345         /*
2346          * It would be easiest to just log an error and exit.  We can't
2347          * do this, though, because log_errx() is not signal safe, since
2348          * it calls syslog(3).  Instead, set a flag checked by pdu_send()
2349          * and pdu_receive(), to call log_errx() there.  Should they fail
2350          * to notice, we'll exit here one second later.
2351          */
2352         if (sigalrm_received) {
2353                 /*
2354                  * Oh well.  Just give up and quit.
2355                  */
2356                 _exit(2);
2357         }
2358
2359         sigalrm_received = true;
2360 }
2361
2362 static void
2363 sigalrm_handler(int dummy __unused)
2364 {
2365
2366         sigalrm_received = true;
2367 }
2368
2369 void
2370 set_timeout(int timeout, int fatal)
2371 {
2372         struct sigaction sa;
2373         struct itimerval itv;
2374         int error;
2375
2376         if (timeout <= 0) {
2377                 log_debugx("session timeout disabled");
2378                 bzero(&itv, sizeof(itv));
2379                 error = setitimer(ITIMER_REAL, &itv, NULL);
2380                 if (error != 0)
2381                         log_err(1, "setitimer");
2382                 sigalrm_received = false;
2383                 return;
2384         }
2385
2386         sigalrm_received = false;
2387         bzero(&sa, sizeof(sa));
2388         if (fatal)
2389                 sa.sa_handler = sigalrm_handler_fatal;
2390         else
2391                 sa.sa_handler = sigalrm_handler;
2392         sigfillset(&sa.sa_mask);
2393         error = sigaction(SIGALRM, &sa, NULL);
2394         if (error != 0)
2395                 log_err(1, "sigaction");
2396
2397         /*
2398          * First SIGALRM will arive after conf_timeout seconds.
2399          * If we do nothing, another one will arrive a second later.
2400          */
2401         log_debugx("setting session timeout to %d seconds", timeout);
2402         bzero(&itv, sizeof(itv));
2403         itv.it_interval.tv_sec = 1;
2404         itv.it_value.tv_sec = timeout;
2405         error = setitimer(ITIMER_REAL, &itv, NULL);
2406         if (error != 0)
2407                 log_err(1, "setitimer");
2408 }
2409
2410 static int
2411 wait_for_children(bool block)
2412 {
2413         pid_t pid;
2414         int status;
2415         int num = 0;
2416
2417         for (;;) {
2418                 /*
2419                  * If "block" is true, wait for at least one process.
2420                  */
2421                 if (block && num == 0)
2422                         pid = wait4(-1, &status, 0, NULL);
2423                 else
2424                         pid = wait4(-1, &status, WNOHANG, NULL);
2425                 if (pid <= 0)
2426                         break;
2427                 if (WIFSIGNALED(status)) {
2428                         log_warnx("child process %d terminated with signal %d",
2429                             pid, WTERMSIG(status));
2430                 } else if (WEXITSTATUS(status) != 0) {
2431                         log_warnx("child process %d terminated with exit status %d",
2432                             pid, WEXITSTATUS(status));
2433                 } else {
2434                         log_debugx("child process %d terminated gracefully", pid);
2435                 }
2436                 num++;
2437         }
2438
2439         return (num);
2440 }
2441
2442 static void
2443 handle_connection(struct portal *portal, int fd,
2444     const struct sockaddr *client_sa, bool dont_fork)
2445 {
2446         struct ctld_connection *conn;
2447         int error;
2448         pid_t pid;
2449         char host[NI_MAXHOST + 1];
2450         struct conf *conf;
2451
2452         conf = portal->p_portal_group->pg_conf;
2453
2454         if (dont_fork) {
2455                 log_debugx("incoming connection; not forking due to -d flag");
2456         } else {
2457                 nchildren -= wait_for_children(false);
2458                 assert(nchildren >= 0);
2459
2460                 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) {
2461                         log_debugx("maxproc limit of %d child processes hit; "
2462                             "waiting for child process to exit", conf->conf_maxproc);
2463                         nchildren -= wait_for_children(true);
2464                         assert(nchildren >= 0);
2465                 }
2466                 log_debugx("incoming connection; forking child process #%d",
2467                     nchildren);
2468                 nchildren++;
2469                 pid = fork();
2470                 if (pid < 0)
2471                         log_err(1, "fork");
2472                 if (pid > 0) {
2473                         close(fd);
2474                         return;
2475                 }
2476         }
2477         pidfile_close(conf->conf_pidfh);
2478
2479         error = getnameinfo(client_sa, client_sa->sa_len,
2480             host, sizeof(host), NULL, 0, NI_NUMERICHOST);
2481         if (error != 0)
2482                 log_errx(1, "getnameinfo: %s", gai_strerror(error));
2483
2484         log_debugx("accepted connection from %s; portal group \"%s\"",
2485             host, portal->p_portal_group->pg_name);
2486         log_set_peer_addr(host);
2487         setproctitle("%s", host);
2488
2489         conn = connection_new(portal, fd, host, client_sa);
2490         set_timeout(conf->conf_timeout, true);
2491         kernel_capsicate();
2492         login(conn);
2493         if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
2494                 kernel_handoff(conn);
2495                 log_debugx("connection handed off to the kernel");
2496         } else {
2497                 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
2498                 discovery(conn);
2499         }
2500         log_debugx("nothing more to do; exiting");
2501         exit(0);
2502 }
2503
2504 static int
2505 fd_add(int fd, fd_set *fdset, int nfds)
2506 {
2507
2508         /*
2509          * Skip sockets which we failed to bind.
2510          */
2511         if (fd <= 0)
2512                 return (nfds);
2513
2514         FD_SET(fd, fdset);
2515         if (fd > nfds)
2516                 nfds = fd;
2517         return (nfds);
2518 }
2519
2520 static void
2521 main_loop(struct conf *conf, bool dont_fork)
2522 {
2523         struct portal_group *pg;
2524         struct portal *portal;
2525         struct sockaddr_storage client_sa;
2526         socklen_t client_salen;
2527 #ifdef ICL_KERNEL_PROXY
2528         int connection_id;
2529         int portal_id;
2530 #endif
2531         fd_set fdset;
2532         int error, nfds, client_fd;
2533
2534         pidfile_write(conf->conf_pidfh);
2535
2536         for (;;) {
2537                 if (sighup_received || sigterm_received || timed_out())
2538                         return;
2539
2540 #ifdef ICL_KERNEL_PROXY
2541                 if (proxy_mode) {
2542                         client_salen = sizeof(client_sa);
2543                         kernel_accept(&connection_id, &portal_id,
2544                             (struct sockaddr *)&client_sa, &client_salen);
2545                         assert(client_salen >= client_sa.ss_len);
2546
2547                         log_debugx("incoming connection, id %d, portal id %d",
2548                             connection_id, portal_id);
2549                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2550                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2551                                         if (portal->p_id == portal_id) {
2552                                                 goto found;
2553                                         }
2554                                 }
2555                         }
2556
2557                         log_errx(1, "kernel returned invalid portal_id %d",
2558                             portal_id);
2559
2560 found:
2561                         handle_connection(portal, connection_id,
2562                             (struct sockaddr *)&client_sa, dont_fork);
2563                 } else {
2564 #endif
2565                         assert(proxy_mode == false);
2566
2567                         FD_ZERO(&fdset);
2568                         nfds = 0;
2569                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2570                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
2571                                         nfds = fd_add(portal->p_socket, &fdset, nfds);
2572                         }
2573                         error = select(nfds + 1, &fdset, NULL, NULL, NULL);
2574                         if (error <= 0) {
2575                                 if (errno == EINTR)
2576                                         return;
2577                                 log_err(1, "select");
2578                         }
2579                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2580                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2581                                         if (!FD_ISSET(portal->p_socket, &fdset))
2582                                                 continue;
2583                                         client_salen = sizeof(client_sa);
2584                                         client_fd = accept(portal->p_socket,
2585                                             (struct sockaddr *)&client_sa,
2586                                             &client_salen);
2587                                         if (client_fd < 0) {
2588                                                 if (errno == ECONNABORTED)
2589                                                         continue;
2590                                                 log_err(1, "accept");
2591                                         }
2592                                         assert(client_salen >= client_sa.ss_len);
2593
2594                                         handle_connection(portal, client_fd,
2595                                             (struct sockaddr *)&client_sa,
2596                                             dont_fork);
2597                                         break;
2598                                 }
2599                         }
2600 #ifdef ICL_KERNEL_PROXY
2601                 }
2602 #endif
2603         }
2604 }
2605
2606 static void
2607 sighup_handler(int dummy __unused)
2608 {
2609
2610         sighup_received = true;
2611 }
2612
2613 static void
2614 sigterm_handler(int dummy __unused)
2615 {
2616
2617         sigterm_received = true;
2618 }
2619
2620 static void
2621 sigchld_handler(int dummy __unused)
2622 {
2623
2624         /*
2625          * The only purpose of this handler is to make SIGCHLD
2626          * interrupt the ISCSIDWAIT ioctl(2), so we can call
2627          * wait_for_children().
2628          */
2629 }
2630
2631 static void
2632 register_signals(void)
2633 {
2634         struct sigaction sa;
2635         int error;
2636
2637         bzero(&sa, sizeof(sa));
2638         sa.sa_handler = sighup_handler;
2639         sigfillset(&sa.sa_mask);
2640         error = sigaction(SIGHUP, &sa, NULL);
2641         if (error != 0)
2642                 log_err(1, "sigaction");
2643
2644         sa.sa_handler = sigterm_handler;
2645         error = sigaction(SIGTERM, &sa, NULL);
2646         if (error != 0)
2647                 log_err(1, "sigaction");
2648
2649         sa.sa_handler = sigterm_handler;
2650         error = sigaction(SIGINT, &sa, NULL);
2651         if (error != 0)
2652                 log_err(1, "sigaction");
2653
2654         sa.sa_handler = sigchld_handler;
2655         error = sigaction(SIGCHLD, &sa, NULL);
2656         if (error != 0)
2657                 log_err(1, "sigaction");
2658 }
2659
2660 static void
2661 check_perms(const char *path)
2662 {
2663         struct stat sb;
2664         int error;
2665
2666         error = stat(path, &sb);
2667         if (error != 0) {
2668                 log_warn("stat");
2669                 return;
2670         }
2671         if (sb.st_mode & S_IWOTH) {
2672                 log_warnx("%s is world-writable", path);
2673         } else if (sb.st_mode & S_IROTH) {
2674                 log_warnx("%s is world-readable", path);
2675         } else if (sb.st_mode & S_IXOTH) {
2676                 /*
2677                  * Ok, this one doesn't matter, but still do it,
2678                  * just for consistency.
2679                  */
2680                 log_warnx("%s is world-executable", path);
2681         }
2682
2683         /*
2684          * XXX: Should we also check for owner != 0?
2685          */
2686 }
2687
2688 static struct conf *
2689 conf_new_from_file(const char *path, struct conf *oldconf, bool ucl)
2690 {
2691         struct conf *conf;
2692         struct auth_group *ag;
2693         struct portal_group *pg;
2694         struct pport *pp;
2695         int error;
2696
2697         log_debugx("obtaining configuration from %s", path);
2698
2699         conf = conf_new();
2700
2701         TAILQ_FOREACH(pp, &oldconf->conf_pports, pp_next)
2702                 pport_copy(pp, conf);
2703
2704         ag = auth_group_new(conf, "default");
2705         assert(ag != NULL);
2706
2707         ag = auth_group_new(conf, "no-authentication");
2708         assert(ag != NULL);
2709         ag->ag_type = AG_TYPE_NO_AUTHENTICATION;
2710
2711         ag = auth_group_new(conf, "no-access");
2712         assert(ag != NULL);
2713         ag->ag_type = AG_TYPE_DENY;
2714
2715         pg = portal_group_new(conf, "default");
2716         assert(pg != NULL);
2717
2718         if (ucl)
2719                 error = uclparse_conf(conf, path);
2720         else
2721                 error = parse_conf(conf, path);
2722
2723         if (error != 0) {
2724                 conf_delete(conf);
2725                 return (NULL);
2726         }
2727
2728         check_perms(path);
2729
2730         if (conf->conf_default_ag_defined == false) {
2731                 log_debugx("auth-group \"default\" not defined; "
2732                     "going with defaults");
2733                 ag = auth_group_find(conf, "default");
2734                 assert(ag != NULL);
2735                 ag->ag_type = AG_TYPE_DENY;
2736         }
2737
2738         if (conf->conf_default_pg_defined == false) {
2739                 log_debugx("portal-group \"default\" not defined; "
2740                     "going with defaults");
2741                 pg = portal_group_find(conf, "default");
2742                 assert(pg != NULL);
2743                 portal_group_add_listen(pg, "0.0.0.0:3260", false);
2744                 portal_group_add_listen(pg, "[::]:3260", false);
2745         }
2746
2747         conf->conf_kernel_port_on = true;
2748
2749         error = conf_verify(conf);
2750         if (error != 0) {
2751                 conf_delete(conf);
2752                 return (NULL);
2753         }
2754
2755         return (conf);
2756 }
2757
2758 int
2759 main(int argc, char **argv)
2760 {
2761         struct conf *oldconf, *newconf, *tmpconf;
2762         struct isns *newns;
2763         const char *config_path = DEFAULT_CONFIG_PATH;
2764         int debug = 0, ch, error;
2765         bool dont_daemonize = false;
2766         bool test_config = false;
2767         bool use_ucl = false;
2768
2769         while ((ch = getopt(argc, argv, "dtuf:R")) != -1) {
2770                 switch (ch) {
2771                 case 'd':
2772                         dont_daemonize = true;
2773                         debug++;
2774                         break;
2775                 case 't':
2776                         test_config = true;
2777                         break;
2778                 case 'u':
2779                         use_ucl = true;
2780                         break;
2781                 case 'f':
2782                         config_path = optarg;
2783                         break;
2784                 case 'R':
2785 #ifndef ICL_KERNEL_PROXY
2786                         log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY "
2787                             "does not support iSER protocol");
2788 #endif
2789                         proxy_mode = true;
2790                         break;
2791                 case '?':
2792                 default:
2793                         usage();
2794                 }
2795         }
2796         argc -= optind;
2797         if (argc != 0)
2798                 usage();
2799
2800         log_init(debug);
2801         kernel_init();
2802
2803         oldconf = conf_new_from_kernel();
2804         newconf = conf_new_from_file(config_path, oldconf, use_ucl);
2805
2806         if (newconf == NULL)
2807                 log_errx(1, "configuration error; exiting");
2808
2809         if (test_config)
2810                 return (0);
2811
2812         if (debug > 0) {
2813                 oldconf->conf_debug = debug;
2814                 newconf->conf_debug = debug;
2815         }
2816
2817         error = conf_apply(oldconf, newconf);
2818         if (error != 0)
2819                 log_errx(1, "failed to apply configuration; exiting");
2820
2821         conf_delete(oldconf);
2822         oldconf = NULL;
2823
2824         register_signals();
2825
2826         if (dont_daemonize == false) {
2827                 log_debugx("daemonizing");
2828                 if (daemon(0, 0) == -1) {
2829                         log_warn("cannot daemonize");
2830                         pidfile_remove(newconf->conf_pidfh);
2831                         exit(1);
2832                 }
2833         }
2834
2835         /* Schedule iSNS update */
2836         if (!TAILQ_EMPTY(&newconf->conf_isns))
2837                 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2838
2839         for (;;) {
2840                 main_loop(newconf, dont_daemonize);
2841                 if (sighup_received) {
2842                         sighup_received = false;
2843                         log_debugx("received SIGHUP, reloading configuration");
2844                         tmpconf = conf_new_from_file(config_path, newconf,
2845                             use_ucl);
2846
2847                         if (tmpconf == NULL) {
2848                                 log_warnx("configuration error, "
2849                                     "continuing with old configuration");
2850                         } else {
2851                                 if (debug > 0)
2852                                         tmpconf->conf_debug = debug;
2853                                 oldconf = newconf;
2854                                 newconf = tmpconf;
2855                                 error = conf_apply(oldconf, newconf);
2856                                 if (error != 0)
2857                                         log_warnx("failed to reload "
2858                                             "configuration");
2859                                 conf_delete(oldconf);
2860                                 oldconf = NULL;
2861                         }
2862                 } else if (sigterm_received) {
2863                         log_debugx("exiting on signal; "
2864                             "reloading empty configuration");
2865
2866                         log_debugx("removing CTL iSCSI ports "
2867                             "and terminating all connections");
2868
2869                         oldconf = newconf;
2870                         newconf = conf_new();
2871                         if (debug > 0)
2872                                 newconf->conf_debug = debug;
2873                         error = conf_apply(oldconf, newconf);
2874                         if (error != 0)
2875                                 log_warnx("failed to apply configuration");
2876                         conf_delete(oldconf);
2877                         oldconf = NULL;
2878
2879                         log_warnx("exiting on signal");
2880                         exit(0);
2881                 } else {
2882                         nchildren -= wait_for_children(false);
2883                         assert(nchildren >= 0);
2884                         if (timed_out()) {
2885                                 set_timeout(0, false);
2886                                 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next)
2887                                         isns_check(newns);
2888                                 /* Schedule iSNS update */
2889                                 if (!TAILQ_EMPTY(&newconf->conf_isns)) {
2890                                         set_timeout((newconf->conf_isns_period
2891                                             + 2) / 3,
2892                                             false);
2893                                 }
2894                         }
2895                 }
2896         }
2897         /* NOTREACHED */
2898 }