usr.sbin/ctld/ctld.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   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 __FBSDID("$FreeBSD$");
  34
  35 #include <sys/types.h>
  36 #include <sys/time.h>
  37 #include <sys/socket.h>
  38 #include <sys/stat.h>
  39 #include <sys/wait.h>
  40 #include <netinet/in.h>
  41 #include <arpa/inet.h>
  42 #include <assert.h>
  43 #include <ctype.h>
  44 #include <errno.h>
  45 #include <netdb.h>
  46 #include <signal.h>
  47 #include <stdbool.h>
  48 #include <stdio.h>
  49 #include <stdint.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <unistd.h>
  53
  54 #include "ctld.h"
  55 #include "isns.h"
  56
  57 bool proxy_mode = false;
  58
  59 static volatile bool sighup_received = false;
  60 static volatile bool sigterm_received = false;
  61 static volatile bool sigalrm_received = false;
  62
  63 static int nchildren = 0;
  64 static uint16_t last_portal_group_tag = 0xff;
  65
  66 static void
  67 usage(void)
  68 {
  69
  70         fprintf(stderr, "usage: ctld [-d][-u][-f config-file]\n");
  71         fprintf(stderr, "       ctld -t [-u][-f config-file]\n");
  72         exit(1);
  73 }
  74
  75 char *
  76 checked_strdup(const char *s)
  77 {
  78         char *c;
  79
  80         c = strdup(s);
  81         if (c == NULL)
  82                 log_err(1, "strdup");
  83         return (c);
  84 }
  85
  86 struct conf *
  87 conf_new(void)
  88 {
  89         struct conf *conf;
  90
  91         conf = calloc(1, sizeof(*conf));
  92         if (conf == NULL)
  93                 log_err(1, "calloc");
  94         TAILQ_INIT(&conf->conf_luns);
  95         TAILQ_INIT(&conf->conf_targets);
  96         TAILQ_INIT(&conf->conf_auth_groups);
  97         TAILQ_INIT(&conf->conf_ports);
  98         TAILQ_INIT(&conf->conf_portal_groups);
  99         TAILQ_INIT(&conf->conf_pports);
 100         TAILQ_INIT(&conf->conf_isns);
 101
 102         conf->conf_isns_period = 900;
 103         conf->conf_isns_timeout = 5;
 104         conf->conf_debug = 0;
 105         conf->conf_timeout = 60;
 106         conf->conf_maxproc = 30;
 107
 108         return (conf);
 109 }
 110
 111 void
 112 conf_delete(struct conf *conf)
 113 {
 114         struct lun *lun, *ltmp;
 115         struct target *targ, *tmp;
 116         struct auth_group *ag, *cagtmp;
 117         struct portal_group *pg, *cpgtmp;
 118         struct pport *pp, *pptmp;
 119         struct isns *is, *istmp;
 120
 121         assert(conf->conf_pidfh == NULL);
 122
 123         TAILQ_FOREACH_SAFE(lun, &conf->conf_luns, l_next, ltmp)
 124                 lun_delete(lun);
 125         TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp)
 126                 target_delete(targ);
 127         TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp)
 128                 auth_group_delete(ag);
 129         TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp)
 130                 portal_group_delete(pg);
 131         TAILQ_FOREACH_SAFE(pp, &conf->conf_pports, pp_next, pptmp)
 132                 pport_delete(pp);
 133         TAILQ_FOREACH_SAFE(is, &conf->conf_isns, i_next, istmp)
 134                 isns_delete(is);
 135         assert(TAILQ_EMPTY(&conf->conf_ports));
 136         free(conf->conf_pidfile_path);
 137         free(conf);
 138 }
 139
 140 static struct auth *
 141 auth_new(struct auth_group *ag)
 142 {
 143         struct auth *auth;
 144
 145         auth = calloc(1, sizeof(*auth));
 146         if (auth == NULL)
 147                 log_err(1, "calloc");
 148         auth->a_auth_group = ag;
 149         TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next);
 150         return (auth);
 151 }
 152
 153 static void
 154 auth_delete(struct auth *auth)
 155 {
 156         TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next);
 157
 158         free(auth->a_user);
 159         free(auth->a_secret);
 160         free(auth->a_mutual_user);
 161         free(auth->a_mutual_secret);
 162         free(auth);
 163 }
 164
 165 const struct auth *
 166 auth_find(const struct auth_group *ag, const char *user)
 167 {
 168         const struct auth *auth;
 169
 170         TAILQ_FOREACH(auth, &ag->ag_auths, a_next) {
 171                 if (strcmp(auth->a_user, user) == 0)
 172                         return (auth);
 173         }
 174
 175         return (NULL);
 176 }
 177
 178 static void
 179 auth_check_secret_length(struct auth *auth)
 180 {
 181         size_t len;
 182
 183         len = strlen(auth->a_secret);
 184         if (len > 16) {
 185                 if (auth->a_auth_group->ag_name != NULL)
 186                         log_warnx("secret for user \"%s\", auth-group \"%s\", "
 187                             "is too long; it should be at most 16 characters "
 188                             "long", auth->a_user, auth->a_auth_group->ag_name);
 189                 else
 190                         log_warnx("secret for user \"%s\", target \"%s\", "
 191                             "is too long; it should be at most 16 characters "
 192                             "long", auth->a_user,
 193                             auth->a_auth_group->ag_target->t_name);
 194         }
 195         if (len < 12) {
 196                 if (auth->a_auth_group->ag_name != NULL)
 197                         log_warnx("secret for user \"%s\", auth-group \"%s\", "
 198                             "is too short; it should be at least 12 characters "
 199                             "long", auth->a_user,
 200                             auth->a_auth_group->ag_name);
 201                 else
 202                         log_warnx("secret for user \"%s\", target \"%s\", "
 203                             "is too short; it should be at least 12 characters "
 204                             "long", auth->a_user,
 205                             auth->a_auth_group->ag_target->t_name);
 206         }
 207
 208         if (auth->a_mutual_secret != NULL) {
 209                 len = strlen(auth->a_mutual_secret);
 210                 if (len > 16) {
 211                         if (auth->a_auth_group->ag_name != NULL)
 212                                 log_warnx("mutual secret for user \"%s\", "
 213                                     "auth-group \"%s\", is too long; it should "
 214                                     "be at most 16 characters long",
 215                                     auth->a_user, auth->a_auth_group->ag_name);
 216                         else
 217                                 log_warnx("mutual secret for user \"%s\", "
 218                                     "target \"%s\", is too long; it should "
 219                                     "be at most 16 characters long",
 220                                     auth->a_user,
 221                                     auth->a_auth_group->ag_target->t_name);
 222                 }
 223                 if (len < 12) {
 224                         if (auth->a_auth_group->ag_name != NULL)
 225                                 log_warnx("mutual secret for user \"%s\", "
 226                                     "auth-group \"%s\", is too short; it "
 227                                     "should be at least 12 characters long",
 228                                     auth->a_user, auth->a_auth_group->ag_name);
 229                         else
 230                                 log_warnx("mutual secret for user \"%s\", "
 231                                     "target \"%s\", is too short; it should be "
 232                                     "at least 12 characters long",
 233                                     auth->a_user,
 234                                     auth->a_auth_group->ag_target->t_name);
 235                 }
 236         }
 237 }
 238
 239 const struct auth *
 240 auth_new_chap(struct auth_group *ag, const char *user,
 241     const char *secret)
 242 {
 243         struct auth *auth;
 244
 245         if (ag->ag_type == AG_TYPE_UNKNOWN)
 246                 ag->ag_type = AG_TYPE_CHAP;
 247         if (ag->ag_type != AG_TYPE_CHAP) {
 248                 if (ag->ag_name != NULL)
 249                         log_warnx("cannot mix \"chap\" authentication with "
 250                             "other types for auth-group \"%s\"", ag->ag_name);
 251                 else
 252                         log_warnx("cannot mix \"chap\" authentication with "
 253                             "other types for target \"%s\"",
 254                             ag->ag_target->t_name);
 255                 return (NULL);
 256         }
 257
 258         auth = auth_new(ag);
 259         auth->a_user = checked_strdup(user);
 260         auth->a_secret = checked_strdup(secret);
 261
 262         auth_check_secret_length(auth);
 263
 264         return (auth);
 265 }
 266
 267 const struct auth *
 268 auth_new_chap_mutual(struct auth_group *ag, const char *user,
 269     const char *secret, const char *user2, const char *secret2)
 270 {
 271         struct auth *auth;
 272
 273         if (ag->ag_type == AG_TYPE_UNKNOWN)
 274                 ag->ag_type = AG_TYPE_CHAP_MUTUAL;
 275         if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) {
 276                 if (ag->ag_name != NULL)
 277                         log_warnx("cannot mix \"chap-mutual\" authentication "
 278                             "with other types for auth-group \"%s\"",
 279                             ag->ag_name);
 280                 else
 281                         log_warnx("cannot mix \"chap-mutual\" authentication "
 282                             "with other types for target \"%s\"",
 283                             ag->ag_target->t_name);
 284                 return (NULL);
 285         }
 286
 287         auth = auth_new(ag);
 288         auth->a_user = checked_strdup(user);
 289         auth->a_secret = checked_strdup(secret);
 290         auth->a_mutual_user = checked_strdup(user2);
 291         auth->a_mutual_secret = checked_strdup(secret2);
 292
 293         auth_check_secret_length(auth);
 294
 295         return (auth);
 296 }
 297
 298 const struct auth_name *
 299 auth_name_new(struct auth_group *ag, const char *name)
 300 {
 301         struct auth_name *an;
 302
 303         an = calloc(1, sizeof(*an));
 304         if (an == NULL)
 305                 log_err(1, "calloc");
 306         an->an_auth_group = ag;
 307         an->an_initator_name = checked_strdup(name);
 308         TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next);
 309         return (an);
 310 }
 311
 312 static void
 313 auth_name_delete(struct auth_name *an)
 314 {
 315         TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next);
 316
 317         free(an->an_initator_name);
 318         free(an);
 319 }
 320
 321 bool
 322 auth_name_defined(const struct auth_group *ag)
 323 {
 324         if (TAILQ_EMPTY(&ag->ag_names))
 325                 return (false);
 326         return (true);
 327 }
 328
 329 const struct auth_name *
 330 auth_name_find(const struct auth_group *ag, const char *name)
 331 {
 332         const struct auth_name *auth_name;
 333
 334         TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) {
 335                 if (strcmp(auth_name->an_initator_name, name) == 0)
 336                         return (auth_name);
 337         }
 338
 339         return (NULL);
 340 }
 341
 342 int
 343 auth_name_check(const struct auth_group *ag, const char *initiator_name)
 344 {
 345         if (!auth_name_defined(ag))
 346                 return (0);
 347
 348         if (auth_name_find(ag, initiator_name) == NULL)
 349                 return (1);
 350
 351         return (0);
 352 }
 353
 354 const struct auth_portal *
 355 auth_portal_new(struct auth_group *ag, const char *portal)
 356 {
 357         struct auth_portal *ap;
 358         char *net, *mask, *str, *tmp;
 359         int len, dm, m;
 360
 361         ap = calloc(1, sizeof(*ap));
 362         if (ap == NULL)
 363                 log_err(1, "calloc");
 364         ap->ap_auth_group = ag;
 365         ap->ap_initator_portal = checked_strdup(portal);
 366         mask = str = checked_strdup(portal);
 367         net = strsep(&mask, "/");
 368         if (net[0] == '[')
 369                 net++;
 370         len = strlen(net);
 371         if (len == 0)
 372                 goto error;
 373         if (net[len - 1] == ']')
 374                 net[len - 1] = 0;
 375         if (strchr(net, ':') != NULL) {
 376                 struct sockaddr_in6 *sin6 =
 377                     (struct sockaddr_in6 *)&ap->ap_sa;
 378
 379                 sin6->sin6_len = sizeof(*sin6);
 380                 sin6->sin6_family = AF_INET6;
 381                 if (inet_pton(AF_INET6, net, &sin6->sin6_addr) <= 0)
 382                         goto error;
 383                 dm = 128;
 384         } else {
 385                 struct sockaddr_in *sin =
 386                     (struct sockaddr_in *)&ap->ap_sa;
 387
 388                 sin->sin_len = sizeof(*sin);
 389                 sin->sin_family = AF_INET;
 390                 if (inet_pton(AF_INET, net, &sin->sin_addr) <= 0)
 391                         goto error;
 392                 dm = 32;
 393         }
 394         if (mask != NULL) {
 395                 m = strtol(mask, &tmp, 0);
 396                 if (m < 0 || m > dm || tmp[0] != 0)
 397                         goto error;
 398         } else
 399                 m = dm;
 400         ap->ap_mask = m;
 401         free(str);
 402         TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next);
 403         return (ap);
 404
 405 error:
 406         free(str);
 407         free(ap);
 408         log_warnx("incorrect initiator portal \"%s\"", portal);
 409         return (NULL);
 410 }
 411
 412 static void
 413 auth_portal_delete(struct auth_portal *ap)
 414 {
 415         TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next);
 416
 417         free(ap->ap_initator_portal);
 418         free(ap);
 419 }
 420
 421 bool
 422 auth_portal_defined(const struct auth_group *ag)
 423 {
 424         if (TAILQ_EMPTY(&ag->ag_portals))
 425                 return (false);
 426         return (true);
 427 }
 428
 429 const struct auth_portal *
 430 auth_portal_find(const struct auth_group *ag, const struct sockaddr_storage *ss)
 431 {
 432         const struct auth_portal *ap;
 433         const uint8_t *a, *b;
 434         int i;
 435         uint8_t bmask;
 436
 437         TAILQ_FOREACH(ap, &ag->ag_portals, ap_next) {
 438                 if (ap->ap_sa.ss_family != ss->ss_family)
 439                         continue;
 440                 if (ss->ss_family == AF_INET) {
 441                         a = (const uint8_t *)
 442                             &((const struct sockaddr_in *)ss)->sin_addr;
 443                         b = (const uint8_t *)
 444                             &((const struct sockaddr_in *)&ap->ap_sa)->sin_addr;
 445                 } else {
 446                         a = (const uint8_t *)
 447                             &((const struct sockaddr_in6 *)ss)->sin6_addr;
 448                         b = (const uint8_t *)
 449                             &((const struct sockaddr_in6 *)&ap->ap_sa)->sin6_addr;
 450                 }
 451                 for (i = 0; i < ap->ap_mask / 8; i++) {
 452                         if (a[i] != b[i])
 453                                 goto next;
 454                 }
 455                 if (ap->ap_mask % 8) {
 456                         bmask = 0xff << (8 - (ap->ap_mask % 8));
 457                         if ((a[i] & bmask) != (b[i] & bmask))
 458                                 goto next;
 459                 }
 460                 return (ap);
 461 next:
 462                 ;
 463         }
 464
 465         return (NULL);
 466 }
 467
 468 int
 469 auth_portal_check(const struct auth_group *ag, const struct sockaddr_storage *sa)
 470 {
 471
 472         if (!auth_portal_defined(ag))
 473                 return (0);
 474
 475         if (auth_portal_find(ag, sa) == NULL)
 476                 return (1);
 477
 478         return (0);
 479 }
 480
 481 struct auth_group *
 482 auth_group_new(struct conf *conf, const char *name)
 483 {
 484         struct auth_group *ag;
 485
 486         if (name != NULL) {
 487                 ag = auth_group_find(conf, name);
 488                 if (ag != NULL) {
 489                         log_warnx("duplicated auth-group \"%s\"", name);
 490                         return (NULL);
 491                 }
 492         }
 493
 494         ag = calloc(1, sizeof(*ag));
 495         if (ag == NULL)
 496                 log_err(1, "calloc");
 497         if (name != NULL)
 498                 ag->ag_name = checked_strdup(name);
 499         TAILQ_INIT(&ag->ag_auths);
 500         TAILQ_INIT(&ag->ag_names);
 501         TAILQ_INIT(&ag->ag_portals);
 502         ag->ag_conf = conf;
 503         TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next);
 504
 505         return (ag);
 506 }
 507
 508 void
 509 auth_group_delete(struct auth_group *ag)
 510 {
 511         struct auth *auth, *auth_tmp;
 512         struct auth_name *auth_name, *auth_name_tmp;
 513         struct auth_portal *auth_portal, *auth_portal_tmp;
 514
 515         TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next);
 516
 517         TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp)
 518                 auth_delete(auth);
 519         TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp)
 520                 auth_name_delete(auth_name);
 521         TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next,
 522             auth_portal_tmp)
 523                 auth_portal_delete(auth_portal);
 524         free(ag->ag_name);
 525         free(ag);
 526 }
 527
 528 struct auth_group *
 529 auth_group_find(const struct conf *conf, const char *name)
 530 {
 531         struct auth_group *ag;
 532
 533         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
 534                 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0)
 535                         return (ag);
 536         }
 537
 538         return (NULL);
 539 }
 540
 541 int
 542 auth_group_set_type(struct auth_group *ag, const char *str)
 543 {
 544         int type;
 545
 546         if (strcmp(str, "none") == 0) {
 547                 type = AG_TYPE_NO_AUTHENTICATION;
 548         } else if (strcmp(str, "deny") == 0) {
 549                 type = AG_TYPE_DENY;
 550         } else if (strcmp(str, "chap") == 0) {
 551                 type = AG_TYPE_CHAP;
 552         } else if (strcmp(str, "chap-mutual") == 0) {
 553                 type = AG_TYPE_CHAP_MUTUAL;
 554         } else {
 555                 if (ag->ag_name != NULL)
 556                         log_warnx("invalid auth-type \"%s\" for auth-group "
 557                             "\"%s\"", str, ag->ag_name);
 558                 else
 559                         log_warnx("invalid auth-type \"%s\" for target "
 560                             "\"%s\"", str, ag->ag_target->t_name);
 561                 return (1);
 562         }
 563
 564         if (ag->ag_type != AG_TYPE_UNKNOWN && ag->ag_type != type) {
 565                 if (ag->ag_name != NULL) {
 566                         log_warnx("cannot set auth-type to \"%s\" for "
 567                             "auth-group \"%s\"; already has a different "
 568                             "type", str, ag->ag_name);
 569                 } else {
 570                         log_warnx("cannot set auth-type to \"%s\" for target "
 571                             "\"%s\"; already has a different type",
 572                             str, ag->ag_target->t_name);
 573                 }
 574                 return (1);
 575         }
 576
 577         ag->ag_type = type;
 578
 579         return (0);
 580 }
 581
 582 static struct portal *
 583 portal_new(struct portal_group *pg)
 584 {
 585         struct portal *portal;
 586
 587         portal = calloc(1, sizeof(*portal));
 588         if (portal == NULL)
 589                 log_err(1, "calloc");
 590         TAILQ_INIT(&portal->p_targets);
 591         portal->p_portal_group = pg;
 592         TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next);
 593         return (portal);
 594 }
 595
 596 static void
 597 portal_delete(struct portal *portal)
 598 {
 599
 600         TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next);
 601         if (portal->p_ai != NULL)
 602                 freeaddrinfo(portal->p_ai);
 603         free(portal->p_listen);
 604         free(portal);
 605 }
 606
 607 struct portal_group *
 608 portal_group_new(struct conf *conf, const char *name)
 609 {
 610         struct portal_group *pg;
 611
 612         pg = portal_group_find(conf, name);
 613         if (pg != NULL) {
 614                 log_warnx("duplicated portal-group \"%s\"", name);
 615                 return (NULL);
 616         }
 617
 618         pg = calloc(1, sizeof(*pg));
 619         if (pg == NULL)
 620                 log_err(1, "calloc");
 621         pg->pg_name = checked_strdup(name);
 622         TAILQ_INIT(&pg->pg_options);
 623         TAILQ_INIT(&pg->pg_portals);
 624         TAILQ_INIT(&pg->pg_ports);
 625         pg->pg_conf = conf;
 626         pg->pg_tag = 0;         /* Assigned later in conf_apply(). */
 627         pg->pg_dscp = -1;
 628         pg->pg_pcp = -1;
 629         TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next);
 630
 631         return (pg);
 632 }
 633
 634 void
 635 portal_group_delete(struct portal_group *pg)
 636 {
 637         struct portal *portal, *tmp;
 638         struct port *port, *tport;
 639         struct option *o, *otmp;
 640
 641         TAILQ_FOREACH_SAFE(port, &pg->pg_ports, p_pgs, tport)
 642                 port_delete(port);
 643         TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next);
 644
 645         TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp)
 646                 portal_delete(portal);
 647         TAILQ_FOREACH_SAFE(o, &pg->pg_options, o_next, otmp)
 648                 option_delete(&pg->pg_options, o);
 649         free(pg->pg_name);
 650         free(pg->pg_offload);
 651         free(pg->pg_redirection);
 652         free(pg);
 653 }
 654
 655 struct portal_group *
 656 portal_group_find(const struct conf *conf, const char *name)
 657 {
 658         struct portal_group *pg;
 659
 660         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
 661                 if (strcmp(pg->pg_name, name) == 0)
 662                         return (pg);
 663         }
 664
 665         return (NULL);
 666 }
 667
 668 static int
 669 parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai)
 670 {
 671         struct addrinfo hints;
 672         char *str, *addr, *ch;
 673         const char *port;
 674         int error, colons = 0;
 675
 676         str = arg = strdup(arg);
 677         if (arg[0] == '[') {
 678                 /*
 679                  * IPv6 address in square brackets, perhaps with port.
 680                  */
 681                 arg++;
 682                 addr = strsep(&arg, "]");
 683                 if (arg == NULL) {
 684                         free(str);
 685                         return (1);
 686                 }
 687                 if (arg[0] == '\0') {
 688                         port = def_port;
 689                 } else if (arg[0] == ':') {
 690                         port = arg + 1;
 691                 } else {
 692                         free(str);
 693                         return (1);
 694                 }
 695         } else {
 696                 /*
 697                  * Either IPv6 address without brackets - and without
 698                  * a port - or IPv4 address.  Just count the colons.
 699                  */
 700                 for (ch = arg; *ch != '\0'; ch++) {
 701                         if (*ch == ':')
 702                                 colons++;
 703                 }
 704                 if (colons > 1) {
 705                         addr = arg;
 706                         port = def_port;
 707                 } else {
 708                         addr = strsep(&arg, ":");
 709                         if (arg == NULL)
 710                                 port = def_port;
 711                         else
 712                                 port = arg;
 713                 }
 714         }
 715
 716         memset(&hints, 0, sizeof(hints));
 717         hints.ai_family = PF_UNSPEC;
 718         hints.ai_socktype = SOCK_STREAM;
 719         hints.ai_flags = AI_PASSIVE;
 720         error = getaddrinfo(addr, port, &hints, ai);
 721         free(str);
 722         return ((error != 0) ? 1 : 0);
 723 }
 724
 725 int
 726 portal_group_add_listen(struct portal_group *pg, const char *value, bool iser)
 727 {
 728         struct portal *portal;
 729
 730         portal = portal_new(pg);
 731         portal->p_listen = checked_strdup(value);
 732         portal->p_iser = iser;
 733
 734         if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) {
 735                 log_warnx("invalid listen address %s", portal->p_listen);
 736                 portal_delete(portal);
 737                 return (1);
 738         }
 739
 740         /*
 741          * XXX: getaddrinfo(3) may return multiple addresses; we should turn
 742          *      those into multiple portals.
 743          */
 744
 745         return (0);
 746 }
 747
 748 int
 749 isns_new(struct conf *conf, const char *addr)
 750 {
 751         struct isns *isns;
 752
 753         isns = calloc(1, sizeof(*isns));
 754         if (isns == NULL)
 755                 log_err(1, "calloc");
 756         isns->i_conf = conf;
 757         TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next);
 758         isns->i_addr = checked_strdup(addr);
 759
 760         if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) {
 761                 log_warnx("invalid iSNS address %s", isns->i_addr);
 762                 isns_delete(isns);
 763                 return (1);
 764         }
 765
 766         /*
 767          * XXX: getaddrinfo(3) may return multiple addresses; we should turn
 768          *      those into multiple servers.
 769          */
 770
 771         return (0);
 772 }
 773
 774 void
 775 isns_delete(struct isns *isns)
 776 {
 777
 778         TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next);
 779         free(isns->i_addr);
 780         if (isns->i_ai != NULL)
 781                 freeaddrinfo(isns->i_ai);
 782         free(isns);
 783 }
 784
 785 static int
 786 isns_do_connect(struct isns *isns)
 787 {
 788         int s;
 789
 790         s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype,
 791             isns->i_ai->ai_protocol);
 792         if (s < 0) {
 793                 log_warn("socket(2) failed for %s", isns->i_addr);
 794                 return (-1);
 795         }
 796         if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) {
 797                 log_warn("connect(2) failed for %s", isns->i_addr);
 798                 close(s);
 799                 return (-1);
 800         }
 801         return(s);
 802 }
 803
 804 static int
 805 isns_do_register(struct isns *isns, int s, const char *hostname)
 806 {
 807         struct conf *conf = isns->i_conf;
 808         struct target *target;
 809         struct portal *portal;
 810         struct portal_group *pg;
 811         struct port *port;
 812         struct isns_req *req;
 813         int res = 0;
 814         uint32_t error;
 815
 816         req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT);
 817         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 818         isns_req_add_delim(req);
 819         isns_req_add_str(req, 1, hostname);
 820         isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */
 821         isns_req_add_32(req, 6, conf->conf_isns_period);
 822         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
 823                 if (pg->pg_unassigned)
 824                         continue;
 825                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
 826                         isns_req_add_addr(req, 16, portal->p_ai);
 827                         isns_req_add_port(req, 17, portal->p_ai);
 828                 }
 829         }
 830         TAILQ_FOREACH(target, &conf->conf_targets, t_next) {
 831                 isns_req_add_str(req, 32, target->t_name);
 832                 isns_req_add_32(req, 33, 1); /* 1 -- Target*/
 833                 if (target->t_alias != NULL)
 834                         isns_req_add_str(req, 34, target->t_alias);
 835                 TAILQ_FOREACH(port, &target->t_ports, p_ts) {
 836                         if ((pg = port->p_portal_group) == NULL)
 837                                 continue;
 838                         isns_req_add_32(req, 51, pg->pg_tag);
 839                         TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
 840                                 isns_req_add_addr(req, 49, portal->p_ai);
 841                                 isns_req_add_port(req, 50, portal->p_ai);
 842                         }
 843                 }
 844         }
 845         res = isns_req_send(s, req);
 846         if (res < 0) {
 847                 log_warn("send(2) failed for %s", isns->i_addr);
 848                 goto quit;
 849         }
 850         res = isns_req_receive(s, req);
 851         if (res < 0) {
 852                 log_warn("receive(2) failed for %s", isns->i_addr);
 853                 goto quit;
 854         }
 855         error = isns_req_get_status(req);
 856         if (error != 0) {
 857                 log_warnx("iSNS register error %d for %s", error, isns->i_addr);
 858                 res = -1;
 859         }
 860 quit:
 861         isns_req_free(req);
 862         return (res);
 863 }
 864
 865 static int
 866 isns_do_check(struct isns *isns, int s, const char *hostname)
 867 {
 868         struct conf *conf = isns->i_conf;
 869         struct isns_req *req;
 870         int res = 0;
 871         uint32_t error;
 872
 873         req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT);
 874         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 875         isns_req_add_str(req, 1, hostname);
 876         isns_req_add_delim(req);
 877         isns_req_add(req, 2, 0, NULL);
 878         res = isns_req_send(s, req);
 879         if (res < 0) {
 880                 log_warn("send(2) failed for %s", isns->i_addr);
 881                 goto quit;
 882         }
 883         res = isns_req_receive(s, req);
 884         if (res < 0) {
 885                 log_warn("receive(2) failed for %s", isns->i_addr);
 886                 goto quit;
 887         }
 888         error = isns_req_get_status(req);
 889         if (error != 0) {
 890                 log_warnx("iSNS check error %d for %s", error, isns->i_addr);
 891                 res = -1;
 892         }
 893 quit:
 894         isns_req_free(req);
 895         return (res);
 896 }
 897
 898 static int
 899 isns_do_deregister(struct isns *isns, int s, const char *hostname)
 900 {
 901         struct conf *conf = isns->i_conf;
 902         struct isns_req *req;
 903         int res = 0;
 904         uint32_t error;
 905
 906         req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT);
 907         isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
 908         isns_req_add_delim(req);
 909         isns_req_add_str(req, 1, hostname);
 910         res = isns_req_send(s, req);
 911         if (res < 0) {
 912                 log_warn("send(2) failed for %s", isns->i_addr);
 913                 goto quit;
 914         }
 915         res = isns_req_receive(s, req);
 916         if (res < 0) {
 917                 log_warn("receive(2) failed for %s", isns->i_addr);
 918                 goto quit;
 919         }
 920         error = isns_req_get_status(req);
 921         if (error != 0) {
 922                 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr);
 923                 res = -1;
 924         }
 925 quit:
 926         isns_req_free(req);
 927         return (res);
 928 }
 929
 930 void
 931 isns_register(struct isns *isns, struct isns *oldisns)
 932 {
 933         struct conf *conf = isns->i_conf;
 934         int error, s;
 935         char hostname[256];
 936
 937         if (TAILQ_EMPTY(&conf->conf_targets) ||
 938             TAILQ_EMPTY(&conf->conf_portal_groups))
 939                 return;
 940         set_timeout(conf->conf_isns_timeout, false);
 941         s = isns_do_connect(isns);
 942         if (s < 0) {
 943                 set_timeout(0, false);
 944                 return;
 945         }
 946         error = gethostname(hostname, sizeof(hostname));
 947         if (error != 0)
 948                 log_err(1, "gethostname");
 949
 950         if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets))
 951                 oldisns = isns;
 952         isns_do_deregister(oldisns, s, hostname);
 953         isns_do_register(isns, s, hostname);
 954         close(s);
 955         set_timeout(0, false);
 956 }
 957
 958 void
 959 isns_check(struct isns *isns)
 960 {
 961         struct conf *conf = isns->i_conf;
 962         int error, s, res;
 963         char hostname[256];
 964
 965         if (TAILQ_EMPTY(&conf->conf_targets) ||
 966             TAILQ_EMPTY(&conf->conf_portal_groups))
 967                 return;
 968         set_timeout(conf->conf_isns_timeout, false);
 969         s = isns_do_connect(isns);
 970         if (s < 0) {
 971                 set_timeout(0, false);
 972                 return;
 973         }
 974         error = gethostname(hostname, sizeof(hostname));
 975         if (error != 0)
 976                 log_err(1, "gethostname");
 977
 978         res = isns_do_check(isns, s, hostname);
 979         if (res < 0) {
 980                 isns_do_deregister(isns, s, hostname);
 981                 isns_do_register(isns, s, hostname);
 982         }
 983         close(s);
 984         set_timeout(0, false);
 985 }
 986
 987 void
 988 isns_deregister(struct isns *isns)
 989 {
 990         struct conf *conf = isns->i_conf;
 991         int error, s;
 992         char hostname[256];
 993
 994         if (TAILQ_EMPTY(&conf->conf_targets) ||
 995             TAILQ_EMPTY(&conf->conf_portal_groups))
 996                 return;
 997         set_timeout(conf->conf_isns_timeout, false);
 998         s = isns_do_connect(isns);
 999         if (s < 0)
1000                 return;
1001         error = gethostname(hostname, sizeof(hostname));
1002         if (error != 0)
1003                 log_err(1, "gethostname");
1004
1005         isns_do_deregister(isns, s, hostname);
1006         close(s);
1007         set_timeout(0, false);
1008 }
1009
1010 int
1011 portal_group_set_filter(struct portal_group *pg, const char *str)
1012 {
1013         int filter;
1014
1015         if (strcmp(str, "none") == 0) {
1016                 filter = PG_FILTER_NONE;
1017         } else if (strcmp(str, "portal") == 0) {
1018                 filter = PG_FILTER_PORTAL;
1019         } else if (strcmp(str, "portal-name") == 0) {
1020                 filter = PG_FILTER_PORTAL_NAME;
1021         } else if (strcmp(str, "portal-name-auth") == 0) {
1022                 filter = PG_FILTER_PORTAL_NAME_AUTH;
1023         } else {
1024                 log_warnx("invalid discovery-filter \"%s\" for portal-group "
1025                     "\"%s\"; valid values are \"none\", \"portal\", "
1026                     "\"portal-name\", and \"portal-name-auth\"",
1027                     str, pg->pg_name);
1028                 return (1);
1029         }
1030
1031         if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN &&
1032             pg->pg_discovery_filter != filter) {
1033                 log_warnx("cannot set discovery-filter to \"%s\" for "
1034                     "portal-group \"%s\"; already has a different "
1035                     "value", str, pg->pg_name);
1036                 return (1);
1037         }
1038
1039         pg->pg_discovery_filter = filter;
1040
1041         return (0);
1042 }
1043
1044 int
1045 portal_group_set_offload(struct portal_group *pg, const char *offload)
1046 {
1047
1048         if (pg->pg_offload != NULL) {
1049                 log_warnx("cannot set offload to \"%s\" for "
1050                     "portal-group \"%s\"; already defined",
1051                     offload, pg->pg_name);
1052                 return (1);
1053         }
1054
1055         pg->pg_offload = checked_strdup(offload);
1056
1057         return (0);
1058 }
1059
1060 int
1061 portal_group_set_redirection(struct portal_group *pg, const char *addr)
1062 {
1063
1064         if (pg->pg_redirection != NULL) {
1065                 log_warnx("cannot set redirection to \"%s\" for "
1066                     "portal-group \"%s\"; already defined",
1067                     addr, pg->pg_name);
1068                 return (1);
1069         }
1070
1071         pg->pg_redirection = checked_strdup(addr);
1072
1073         return (0);
1074 }
1075
1076 static bool
1077 valid_hex(const char ch)
1078 {
1079         switch (ch) {
1080         case '0':
1081         case '1':
1082         case '2':
1083         case '3':
1084         case '4':
1085         case '5':
1086         case '6':
1087         case '7':
1088         case '8':
1089         case '9':
1090         case 'a':
1091         case 'A':
1092         case 'b':
1093         case 'B':
1094         case 'c':
1095         case 'C':
1096         case 'd':
1097         case 'D':
1098         case 'e':
1099         case 'E':
1100         case 'f':
1101         case 'F':
1102                 return (true);
1103         default:
1104                 return (false);
1105         }
1106 }
1107
1108 bool
1109 valid_iscsi_name(const char *name)
1110 {
1111         int i;
1112
1113         if (strlen(name) >= MAX_NAME_LEN) {
1114                 log_warnx("overlong name for target \"%s\"; max length allowed "
1115                     "by iSCSI specification is %d characters",
1116                     name, MAX_NAME_LEN);
1117                 return (false);
1118         }
1119
1120         /*
1121          * In the cases below, we don't return an error, just in case the admin
1122          * was right, and we're wrong.
1123          */
1124         if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) {
1125                 for (i = strlen("iqn."); name[i] != '\0'; i++) {
1126                         /*
1127                          * XXX: We should verify UTF-8 normalisation, as defined
1128                          *      by 3.2.6.2: iSCSI Name Encoding.
1129                          */
1130                         if (isalnum(name[i]))
1131                                 continue;
1132                         if (name[i] == '-' || name[i] == '.' || name[i] == ':')
1133                                 continue;
1134                         log_warnx("invalid character \"%c\" in target name "
1135                             "\"%s\"; allowed characters are letters, digits, "
1136                             "'-', '.', and ':'", name[i], name);
1137                         break;
1138                 }
1139                 /*
1140                  * XXX: Check more stuff: valid date and a valid reversed domain.
1141                  */
1142         } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) {
1143                 if (strlen(name) != strlen("eui.") + 16)
1144                         log_warnx("invalid target name \"%s\"; the \"eui.\" "
1145                             "should be followed by exactly 16 hexadecimal "
1146                             "digits", name);
1147                 for (i = strlen("eui."); name[i] != '\0'; i++) {
1148                         if (!valid_hex(name[i])) {
1149                                 log_warnx("invalid character \"%c\" in target "
1150                                     "name \"%s\"; allowed characters are 1-9 "
1151                                     "and A-F", name[i], name);
1152                                 break;
1153                         }
1154                 }
1155         } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) {
1156                 if (strlen(name) > strlen("naa.") + 32)
1157                         log_warnx("invalid target name \"%s\"; the \"naa.\" "
1158                             "should be followed by at most 32 hexadecimal "
1159                             "digits", name);
1160                 for (i = strlen("naa."); name[i] != '\0'; i++) {
1161                         if (!valid_hex(name[i])) {
1162                                 log_warnx("invalid character \"%c\" in target "
1163                                     "name \"%s\"; allowed characters are 1-9 "
1164                                     "and A-F", name[i], name);
1165                                 break;
1166                         }
1167                 }
1168         } else {
1169                 log_warnx("invalid target name \"%s\"; should start with "
1170                     "either \"iqn.\", \"eui.\", or \"naa.\"",
1171                     name);
1172         }
1173         return (true);
1174 }
1175
1176 struct pport *
1177 pport_new(struct conf *conf, const char *name, uint32_t ctl_port)
1178 {
1179         struct pport *pp;
1180
1181         pp = calloc(1, sizeof(*pp));
1182         if (pp == NULL)
1183                 log_err(1, "calloc");
1184         pp->pp_conf = conf;
1185         pp->pp_name = checked_strdup(name);
1186         pp->pp_ctl_port = ctl_port;
1187         TAILQ_INIT(&pp->pp_ports);
1188         TAILQ_INSERT_TAIL(&conf->conf_pports, pp, pp_next);
1189         return (pp);
1190 }
1191
1192 struct pport *
1193 pport_find(const struct conf *conf, const char *name)
1194 {
1195         struct pport *pp;
1196
1197         TAILQ_FOREACH(pp, &conf->conf_pports, pp_next) {
1198                 if (strcasecmp(pp->pp_name, name) == 0)
1199                         return (pp);
1200         }
1201         return (NULL);
1202 }
1203
1204 struct pport *
1205 pport_copy(struct pport *pp, struct conf *conf)
1206 {
1207         struct pport *ppnew;
1208
1209         ppnew = pport_new(conf, pp->pp_name, pp->pp_ctl_port);
1210         return (ppnew);
1211 }
1212
1213 void
1214 pport_delete(struct pport *pp)
1215 {
1216         struct port *port, *tport;
1217
1218         TAILQ_FOREACH_SAFE(port, &pp->pp_ports, p_ts, tport)
1219                 port_delete(port);
1220         TAILQ_REMOVE(&pp->pp_conf->conf_pports, pp, pp_next);
1221         free(pp->pp_name);
1222         free(pp);
1223 }
1224
1225 struct port *
1226 port_new(struct conf *conf, struct target *target, struct portal_group *pg)
1227 {
1228         struct port *port;
1229         char *name;
1230         int ret;
1231
1232         ret = asprintf(&name, "%s-%s", pg->pg_name, target->t_name);
1233         if (ret <= 0)
1234                 log_err(1, "asprintf");
1235         if (port_find(conf, name) != NULL) {
1236                 log_warnx("duplicate port \"%s\"", name);
1237                 free(name);
1238                 return (NULL);
1239         }
1240         port = calloc(1, sizeof(*port));
1241         if (port == NULL)
1242                 log_err(1, "calloc");
1243         port->p_conf = conf;
1244         port->p_name = name;
1245         port->p_ioctl_port = 0;
1246         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1247         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1248         port->p_target = target;
1249         TAILQ_INSERT_TAIL(&pg->pg_ports, port, p_pgs);
1250         port->p_portal_group = pg;
1251         return (port);
1252 }
1253
1254 struct port *
1255 port_new_ioctl(struct conf *conf, struct target *target, int pp, int vp)
1256 {
1257         struct pport *pport;
1258         struct port *port;
1259         char *pname;
1260         char *name;
1261         int ret;
1262
1263         ret = asprintf(&pname, "ioctl/%d/%d", pp, vp);
1264         if (ret <= 0) {
1265                 log_err(1, "asprintf");
1266                 return (NULL);
1267         }
1268
1269         pport = pport_find(conf, pname);
1270         if (pport != NULL) {
1271                 free(pname);
1272                 return (port_new_pp(conf, target, pport));
1273         }
1274
1275         ret = asprintf(&name, "%s-%s", pname, target->t_name);
1276         free(pname);
1277
1278         if (ret <= 0)
1279                 log_err(1, "asprintf");
1280         if (port_find(conf, name) != NULL) {
1281                 log_warnx("duplicate port \"%s\"", name);
1282                 free(name);
1283                 return (NULL);
1284         }
1285         port = calloc(1, sizeof(*port));
1286         if (port == NULL)
1287                 log_err(1, "calloc");
1288         port->p_conf = conf;
1289         port->p_name = name;
1290         port->p_ioctl_port = 1;
1291         port->p_ioctl_pp = pp;
1292         port->p_ioctl_vp = vp;
1293         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1294         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1295         port->p_target = target;
1296         return (port);
1297 }
1298
1299 struct port *
1300 port_new_pp(struct conf *conf, struct target *target, struct pport *pp)
1301 {
1302         struct port *port;
1303         char *name;
1304         int ret;
1305
1306         ret = asprintf(&name, "%s-%s", pp->pp_name, target->t_name);
1307         if (ret <= 0)
1308                 log_err(1, "asprintf");
1309         if (port_find(conf, name) != NULL) {
1310                 log_warnx("duplicate port \"%s\"", name);
1311                 free(name);
1312                 return (NULL);
1313         }
1314         port = calloc(1, sizeof(*port));
1315         if (port == NULL)
1316                 log_err(1, "calloc");
1317         port->p_conf = conf;
1318         port->p_name = name;
1319         TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1320         TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1321         port->p_target = target;
1322         TAILQ_INSERT_TAIL(&pp->pp_ports, port, p_pps);
1323         port->p_pport = pp;
1324         return (port);
1325 }
1326
1327 struct port *
1328 port_find(const struct conf *conf, const char *name)
1329 {
1330         struct port *port;
1331
1332         TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1333                 if (strcasecmp(port->p_name, name) == 0)
1334                         return (port);
1335         }
1336
1337         return (NULL);
1338 }
1339
1340 struct port *
1341 port_find_in_pg(const struct portal_group *pg, const char *target)
1342 {
1343         struct port *port;
1344
1345         TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) {
1346                 if (strcasecmp(port->p_target->t_name, target) == 0)
1347                         return (port);
1348         }
1349
1350         return (NULL);
1351 }
1352
1353 void
1354 port_delete(struct port *port)
1355 {
1356
1357         if (port->p_portal_group)
1358                 TAILQ_REMOVE(&port->p_portal_group->pg_ports, port, p_pgs);
1359         if (port->p_pport)
1360                 TAILQ_REMOVE(&port->p_pport->pp_ports, port, p_pps);
1361         if (port->p_target)
1362                 TAILQ_REMOVE(&port->p_target->t_ports, port, p_ts);
1363         TAILQ_REMOVE(&port->p_conf->conf_ports, port, p_next);
1364         free(port->p_name);
1365         free(port);
1366 }
1367
1368 int
1369 port_is_dummy(struct port *port)
1370 {
1371
1372         if (port->p_portal_group) {
1373                 if (port->p_portal_group->pg_foreign)
1374                         return (1);
1375                 if (TAILQ_EMPTY(&port->p_portal_group->pg_portals))
1376                         return (1);
1377         }
1378         return (0);
1379 }
1380
1381 struct target *
1382 target_new(struct conf *conf, const char *name)
1383 {
1384         struct target *targ;
1385         int i, len;
1386
1387         targ = target_find(conf, name);
1388         if (targ != NULL) {
1389                 log_warnx("duplicated target \"%s\"", name);
1390                 return (NULL);
1391         }
1392         if (valid_iscsi_name(name) == false) {
1393                 log_warnx("target name \"%s\" is invalid", name);
1394                 return (NULL);
1395         }
1396         targ = calloc(1, sizeof(*targ));
1397         if (targ == NULL)
1398                 log_err(1, "calloc");
1399         targ->t_name = checked_strdup(name);
1400
1401         /*
1402          * RFC 3722 requires us to normalize the name to lowercase.
1403          */
1404         len = strlen(name);
1405         for (i = 0; i < len; i++)
1406                 targ->t_name[i] = tolower(targ->t_name[i]);
1407
1408         targ->t_conf = conf;
1409         TAILQ_INIT(&targ->t_ports);
1410         TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next);
1411
1412         return (targ);
1413 }
1414
1415 void
1416 target_delete(struct target *targ)
1417 {
1418         struct port *port, *tport;
1419
1420         TAILQ_FOREACH_SAFE(port, &targ->t_ports, p_ts, tport)
1421                 port_delete(port);
1422         TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next);
1423
1424         free(targ->t_name);
1425         free(targ->t_redirection);
1426         free(targ);
1427 }
1428
1429 struct target *
1430 target_find(struct conf *conf, const char *name)
1431 {
1432         struct target *targ;
1433
1434         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1435                 if (strcasecmp(targ->t_name, name) == 0)
1436                         return (targ);
1437         }
1438
1439         return (NULL);
1440 }
1441
1442 int
1443 target_set_redirection(struct target *target, const char *addr)
1444 {
1445
1446         if (target->t_redirection != NULL) {
1447                 log_warnx("cannot set redirection to \"%s\" for "
1448                     "target \"%s\"; already defined",
1449                     addr, target->t_name);
1450                 return (1);
1451         }
1452
1453         target->t_redirection = checked_strdup(addr);
1454
1455         return (0);
1456 }
1457
1458 struct lun *
1459 lun_new(struct conf *conf, const char *name)
1460 {
1461         struct lun *lun;
1462
1463         lun = lun_find(conf, name);
1464         if (lun != NULL) {
1465                 log_warnx("duplicated lun \"%s\"", name);
1466                 return (NULL);
1467         }
1468
1469         lun = calloc(1, sizeof(*lun));
1470         if (lun == NULL)
1471                 log_err(1, "calloc");
1472         lun->l_conf = conf;
1473         lun->l_name = checked_strdup(name);
1474         TAILQ_INIT(&lun->l_options);
1475         TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next);
1476         lun->l_ctl_lun = -1;
1477
1478         return (lun);
1479 }
1480
1481 void
1482 lun_delete(struct lun *lun)
1483 {
1484         struct target *targ;
1485         struct option *o, *tmp;
1486         int i;
1487
1488         TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) {
1489                 for (i = 0; i < MAX_LUNS; i++) {
1490                         if (targ->t_luns[i] == lun)
1491                                 targ->t_luns[i] = NULL;
1492                 }
1493         }
1494         TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next);
1495
1496         TAILQ_FOREACH_SAFE(o, &lun->l_options, o_next, tmp)
1497                 option_delete(&lun->l_options, o);
1498         free(lun->l_name);
1499         free(lun->l_backend);
1500         free(lun->l_device_id);
1501         free(lun->l_path);
1502         free(lun->l_scsiname);
1503         free(lun->l_serial);
1504         free(lun);
1505 }
1506
1507 struct lun *
1508 lun_find(const struct conf *conf, const char *name)
1509 {
1510         struct lun *lun;
1511
1512         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1513                 if (strcmp(lun->l_name, name) == 0)
1514                         return (lun);
1515         }
1516
1517         return (NULL);
1518 }
1519
1520 void
1521 lun_set_backend(struct lun *lun, const char *value)
1522 {
1523         free(lun->l_backend);
1524         lun->l_backend = checked_strdup(value);
1525 }
1526
1527 void
1528 lun_set_blocksize(struct lun *lun, size_t value)
1529 {
1530
1531         lun->l_blocksize = value;
1532 }
1533
1534 void
1535 lun_set_device_type(struct lun *lun, uint8_t value)
1536 {
1537
1538         lun->l_device_type = value;
1539 }
1540
1541 void
1542 lun_set_device_id(struct lun *lun, const char *value)
1543 {
1544         free(lun->l_device_id);
1545         lun->l_device_id = checked_strdup(value);
1546 }
1547
1548 void
1549 lun_set_path(struct lun *lun, const char *value)
1550 {
1551         free(lun->l_path);
1552         lun->l_path = checked_strdup(value);
1553 }
1554
1555 void
1556 lun_set_scsiname(struct lun *lun, const char *value)
1557 {
1558         free(lun->l_scsiname);
1559         lun->l_scsiname = checked_strdup(value);
1560 }
1561
1562 void
1563 lun_set_serial(struct lun *lun, const char *value)
1564 {
1565         free(lun->l_serial);
1566         lun->l_serial = checked_strdup(value);
1567 }
1568
1569 void
1570 lun_set_size(struct lun *lun, size_t value)
1571 {
1572
1573         lun->l_size = value;
1574 }
1575
1576 void
1577 lun_set_ctl_lun(struct lun *lun, uint32_t value)
1578 {
1579
1580         lun->l_ctl_lun = value;
1581 }
1582
1583 struct option *
1584 option_new(struct options *options, const char *name, const char *value)
1585 {
1586         struct option *o;
1587
1588         o = option_find(options, name);
1589         if (o != NULL) {
1590                 log_warnx("duplicated option \"%s\"", name);
1591                 return (NULL);
1592         }
1593
1594         o = calloc(1, sizeof(*o));
1595         if (o == NULL)
1596                 log_err(1, "calloc");
1597         o->o_name = checked_strdup(name);
1598         o->o_value = checked_strdup(value);
1599         TAILQ_INSERT_TAIL(options, o, o_next);
1600
1601         return (o);
1602 }
1603
1604 void
1605 option_delete(struct options *options, struct option *o)
1606 {
1607
1608         TAILQ_REMOVE(options, o, o_next);
1609         free(o->o_name);
1610         free(o->o_value);
1611         free(o);
1612 }
1613
1614 struct option *
1615 option_find(const struct options *options, const char *name)
1616 {
1617         struct option *o;
1618
1619         TAILQ_FOREACH(o, options, o_next) {
1620                 if (strcmp(o->o_name, name) == 0)
1621                         return (o);
1622         }
1623
1624         return (NULL);
1625 }
1626
1627 void
1628 option_set(struct option *o, const char *value)
1629 {
1630
1631         free(o->o_value);
1632         o->o_value = checked_strdup(value);
1633 }
1634
1635 static struct connection *
1636 connection_new(struct portal *portal, int fd, const char *host,
1637     const struct sockaddr *client_sa)
1638 {
1639         struct connection *conn;
1640
1641         conn = calloc(1, sizeof(*conn));
1642         if (conn == NULL)
1643                 log_err(1, "calloc");
1644         conn->conn_portal = portal;
1645         conn->conn_socket = fd;
1646         conn->conn_initiator_addr = checked_strdup(host);
1647         memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len);
1648
1649         /*
1650          * Default values, from RFC 3720, section 12.
1651          */
1652         conn->conn_max_recv_data_segment_length = 8192;
1653         conn->conn_max_send_data_segment_length = 8192;
1654         conn->conn_max_burst_length = 262144;
1655         conn->conn_first_burst_length = 65536;
1656         conn->conn_immediate_data = true;
1657
1658         return (conn);
1659 }
1660
1661 #if 0
1662 static void
1663 conf_print(struct conf *conf)
1664 {
1665         struct auth_group *ag;
1666         struct auth *auth;
1667         struct auth_name *auth_name;
1668         struct auth_portal *auth_portal;
1669         struct portal_group *pg;
1670         struct portal *portal;
1671         struct target *targ;
1672         struct lun *lun;
1673         struct option *o;
1674
1675         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1676                 fprintf(stderr, "auth-group %s {\n", ag->ag_name);
1677                 TAILQ_FOREACH(auth, &ag->ag_auths, a_next)
1678                         fprintf(stderr, "\t chap-mutual %s %s %s %s\n",
1679                             auth->a_user, auth->a_secret,
1680                             auth->a_mutual_user, auth->a_mutual_secret);
1681                 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next)
1682                         fprintf(stderr, "\t initiator-name %s\n",
1683                             auth_name->an_initator_name);
1684                 TAILQ_FOREACH(auth_portal, &ag->ag_portals, ap_next)
1685                         fprintf(stderr, "\t initiator-portal %s\n",
1686                             auth_portal->ap_initator_portal);
1687                 fprintf(stderr, "}\n");
1688         }
1689         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1690                 fprintf(stderr, "portal-group %s {\n", pg->pg_name);
1691                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
1692                         fprintf(stderr, "\t listen %s\n", portal->p_listen);
1693                 fprintf(stderr, "}\n");
1694         }
1695         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1696                 fprintf(stderr, "\tlun %s {\n", lun->l_name);
1697                 fprintf(stderr, "\t\tpath %s\n", lun->l_path);
1698                 TAILQ_FOREACH(o, &lun->l_options, o_next)
1699                         fprintf(stderr, "\t\toption %s %s\n",
1700                             o->o_name, o->o_value);
1701                 fprintf(stderr, "\t}\n");
1702         }
1703         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1704                 fprintf(stderr, "target %s {\n", targ->t_name);
1705                 if (targ->t_alias != NULL)
1706                         fprintf(stderr, "\t alias %s\n", targ->t_alias);
1707                 fprintf(stderr, "}\n");
1708         }
1709 }
1710 #endif
1711
1712 static int
1713 conf_verify_lun(struct lun *lun)
1714 {
1715         const struct lun *lun2;
1716
1717         if (lun->l_backend == NULL)
1718                 lun_set_backend(lun, "block");
1719         if (strcmp(lun->l_backend, "block") == 0) {
1720                 if (lun->l_path == NULL) {
1721                         log_warnx("missing path for lun \"%s\"",
1722                             lun->l_name);
1723                         return (1);
1724                 }
1725         } else if (strcmp(lun->l_backend, "ramdisk") == 0) {
1726                 if (lun->l_size == 0) {
1727                         log_warnx("missing size for ramdisk-backed lun \"%s\"",
1728                             lun->l_name);
1729                         return (1);
1730                 }
1731                 if (lun->l_path != NULL) {
1732                         log_warnx("path must not be specified "
1733                             "for ramdisk-backed lun \"%s\"",
1734                             lun->l_name);
1735                         return (1);
1736                 }
1737         }
1738         if (lun->l_blocksize == 0) {
1739                 if (lun->l_device_type == 5)
1740                         lun_set_blocksize(lun, DEFAULT_CD_BLOCKSIZE);
1741                 else
1742                         lun_set_blocksize(lun, DEFAULT_BLOCKSIZE);
1743         } else if (lun->l_blocksize < 0) {
1744                 log_warnx("invalid blocksize for lun \"%s\"; "
1745                     "must be larger than 0", lun->l_name);
1746                 return (1);
1747         }
1748         if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) {
1749                 log_warnx("invalid size for lun \"%s\"; "
1750                     "must be multiple of blocksize", lun->l_name);
1751                 return (1);
1752         }
1753         TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) {
1754                 if (lun == lun2)
1755                         continue;
1756                 if (lun->l_path != NULL && lun2->l_path != NULL &&
1757                     strcmp(lun->l_path, lun2->l_path) == 0) {
1758                         log_debugx("WARNING: path \"%s\" duplicated "
1759                             "between lun \"%s\", and "
1760                             "lun \"%s\"", lun->l_path,
1761                             lun->l_name, lun2->l_name);
1762                 }
1763         }
1764
1765         return (0);
1766 }
1767
1768 int
1769 conf_verify(struct conf *conf)
1770 {
1771         struct auth_group *ag;
1772         struct portal_group *pg;
1773         struct port *port;
1774         struct target *targ;
1775         struct lun *lun;
1776         bool found;
1777         int error, i;
1778
1779         if (conf->conf_pidfile_path == NULL)
1780                 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE);
1781
1782         TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1783                 error = conf_verify_lun(lun);
1784                 if (error != 0)
1785                         return (error);
1786         }
1787         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1788                 if (targ->t_auth_group == NULL) {
1789                         targ->t_auth_group = auth_group_find(conf,
1790                             "default");
1791                         assert(targ->t_auth_group != NULL);
1792                 }
1793                 if (TAILQ_EMPTY(&targ->t_ports)) {
1794                         pg = portal_group_find(conf, "default");
1795                         assert(pg != NULL);
1796                         port_new(conf, targ, pg);
1797                 }
1798                 found = false;
1799                 for (i = 0; i < MAX_LUNS; i++) {
1800                         if (targ->t_luns[i] != NULL)
1801                                 found = true;
1802                 }
1803                 if (!found && targ->t_redirection == NULL) {
1804                         log_warnx("no LUNs defined for target \"%s\"",
1805                             targ->t_name);
1806                 }
1807                 if (found && targ->t_redirection != NULL) {
1808                         log_debugx("target \"%s\" contains luns, "
1809                             " but configured for redirection",
1810                             targ->t_name);
1811                 }
1812         }
1813         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1814                 assert(pg->pg_name != NULL);
1815                 if (pg->pg_discovery_auth_group == NULL) {
1816                         pg->pg_discovery_auth_group =
1817                             auth_group_find(conf, "default");
1818                         assert(pg->pg_discovery_auth_group != NULL);
1819                 }
1820
1821                 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN)
1822                         pg->pg_discovery_filter = PG_FILTER_NONE;
1823
1824                 if (pg->pg_redirection != NULL) {
1825                         if (!TAILQ_EMPTY(&pg->pg_ports)) {
1826                                 log_debugx("portal-group \"%s\" assigned "
1827                                     "to target, but configured "
1828                                     "for redirection",
1829                                     pg->pg_name);
1830                         }
1831                         pg->pg_unassigned = false;
1832                 } else if (!TAILQ_EMPTY(&pg->pg_ports)) {
1833                         pg->pg_unassigned = false;
1834                 } else {
1835                         if (strcmp(pg->pg_name, "default") != 0)
1836                                 log_warnx("portal-group \"%s\" not assigned "
1837                                     "to any target", pg->pg_name);
1838                         pg->pg_unassigned = true;
1839                 }
1840         }
1841         TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1842                 if (ag->ag_name == NULL)
1843                         assert(ag->ag_target != NULL);
1844                 else
1845                         assert(ag->ag_target == NULL);
1846
1847                 found = false;
1848                 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1849                         if (targ->t_auth_group == ag) {
1850                                 found = true;
1851                                 break;
1852                         }
1853                 }
1854                 TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1855                         if (port->p_auth_group == ag) {
1856                                 found = true;
1857                                 break;
1858                         }
1859                 }
1860                 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1861                         if (pg->pg_discovery_auth_group == ag) {
1862                                 found = true;
1863                                 break;
1864                         }
1865                 }
1866                 if (!found && ag->ag_name != NULL &&
1867                     strcmp(ag->ag_name, "default") != 0 &&
1868                     strcmp(ag->ag_name, "no-authentication") != 0 &&
1869                     strcmp(ag->ag_name, "no-access") != 0) {
1870                         log_warnx("auth-group \"%s\" not assigned "
1871                             "to any target", ag->ag_name);
1872                 }
1873         }
1874
1875         return (0);
1876 }
1877
1878 static int
1879 conf_apply(struct conf *oldconf, struct conf *newconf)
1880 {
1881         struct lun *oldlun, *newlun, *tmplun;
1882         struct portal_group *oldpg, *newpg;
1883         struct portal *oldp, *newp;
1884         struct port *oldport, *newport, *tmpport;
1885         struct isns *oldns, *newns;
1886         pid_t otherpid;
1887         int changed, cumulated_error = 0, error, sockbuf;
1888         int one = 1;
1889
1890         if (oldconf->conf_debug != newconf->conf_debug) {
1891                 log_debugx("changing debug level to %d", newconf->conf_debug);
1892                 log_init(newconf->conf_debug);
1893         }
1894
1895         if (oldconf->conf_pidfh != NULL) {
1896                 assert(oldconf->conf_pidfile_path != NULL);
1897                 if (newconf->conf_pidfile_path != NULL &&
1898                     strcmp(oldconf->conf_pidfile_path,
1899                     newconf->conf_pidfile_path) == 0) {
1900                         newconf->conf_pidfh = oldconf->conf_pidfh;
1901                         oldconf->conf_pidfh = NULL;
1902                 } else {
1903                         log_debugx("removing pidfile %s",
1904                             oldconf->conf_pidfile_path);
1905                         pidfile_remove(oldconf->conf_pidfh);
1906                         oldconf->conf_pidfh = NULL;
1907                 }
1908         }
1909
1910         if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) {
1911                 log_debugx("opening pidfile %s", newconf->conf_pidfile_path);
1912                 newconf->conf_pidfh =
1913                     pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid);
1914                 if (newconf->conf_pidfh == NULL) {
1915                         if (errno == EEXIST)
1916                                 log_errx(1, "daemon already running, pid: %jd.",
1917                                     (intmax_t)otherpid);
1918                         log_err(1, "cannot open or create pidfile \"%s\"",
1919                             newconf->conf_pidfile_path);
1920                 }
1921         }
1922
1923         /*
1924          * Go through the new portal groups, assigning tags or preserving old.
1925          */
1926         TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
1927                 if (newpg->pg_tag != 0)
1928                         continue;
1929                 oldpg = portal_group_find(oldconf, newpg->pg_name);
1930                 if (oldpg != NULL)
1931                         newpg->pg_tag = oldpg->pg_tag;
1932                 else
1933                         newpg->pg_tag = ++last_portal_group_tag;
1934         }
1935
1936         /* Deregister on removed iSNS servers. */
1937         TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
1938                 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
1939                         if (strcmp(oldns->i_addr, newns->i_addr) == 0)
1940                                 break;
1941                 }
1942                 if (newns == NULL)
1943                         isns_deregister(oldns);
1944         }
1945
1946         /*
1947          * XXX: If target or lun removal fails, we should somehow "move"
1948          *      the old lun or target into newconf, so that subsequent
1949          *      conf_apply() would try to remove them again.  That would
1950          *      be somewhat hairy, though, and lun deletion failures don't
1951          *      really happen, so leave it as it is for now.
1952          */
1953         /*
1954          * First, remove any ports present in the old configuration
1955          * and missing in the new one.
1956          */
1957         TAILQ_FOREACH_SAFE(oldport, &oldconf->conf_ports, p_next, tmpport) {
1958                 if (port_is_dummy(oldport))
1959                         continue;
1960                 newport = port_find(newconf, oldport->p_name);
1961                 if (newport != NULL && !port_is_dummy(newport))
1962                         continue;
1963                 log_debugx("removing port \"%s\"", oldport->p_name);
1964                 error = kernel_port_remove(oldport);
1965                 if (error != 0) {
1966                         log_warnx("failed to remove port %s",
1967                             oldport->p_name);
1968                         /*
1969                          * XXX: Uncomment after fixing the root cause.
1970                          *
1971                          * cumulated_error++;
1972                          */
1973                 }
1974         }
1975
1976         /*
1977          * Second, remove any LUNs present in the old configuration
1978          * and missing in the new one.
1979          */
1980         TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) {
1981                 newlun = lun_find(newconf, oldlun->l_name);
1982                 if (newlun == NULL) {
1983                         log_debugx("lun \"%s\", CTL lun %d "
1984                             "not found in new configuration; "
1985                             "removing", oldlun->l_name, oldlun->l_ctl_lun);
1986                         error = kernel_lun_remove(oldlun);
1987                         if (error != 0) {
1988                                 log_warnx("failed to remove lun \"%s\", "
1989                                     "CTL lun %d",
1990                                     oldlun->l_name, oldlun->l_ctl_lun);
1991                                 cumulated_error++;
1992                         }
1993                         continue;
1994                 }
1995
1996                 /*
1997                  * Also remove the LUNs changed by more than size.
1998                  */
1999                 changed = 0;
2000                 assert(oldlun->l_backend != NULL);
2001                 assert(newlun->l_backend != NULL);
2002                 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) {
2003                         log_debugx("backend for lun \"%s\", "
2004                             "CTL lun %d changed; removing",
2005                             oldlun->l_name, oldlun->l_ctl_lun);
2006                         changed = 1;
2007                 }
2008                 if (oldlun->l_blocksize != newlun->l_blocksize) {
2009                         log_debugx("blocksize for lun \"%s\", "
2010                             "CTL lun %d changed; removing",
2011                             oldlun->l_name, oldlun->l_ctl_lun);
2012                         changed = 1;
2013                 }
2014                 if (newlun->l_device_id != NULL &&
2015                     (oldlun->l_device_id == NULL ||
2016                      strcmp(oldlun->l_device_id, newlun->l_device_id) !=
2017                      0)) {
2018                         log_debugx("device-id for lun \"%s\", "
2019                             "CTL lun %d changed; removing",
2020                             oldlun->l_name, oldlun->l_ctl_lun);
2021                         changed = 1;
2022                 }
2023                 if (newlun->l_path != NULL &&
2024                     (oldlun->l_path == NULL ||
2025                      strcmp(oldlun->l_path, newlun->l_path) != 0)) {
2026                         log_debugx("path for lun \"%s\", "
2027                             "CTL lun %d, changed; removing",
2028                             oldlun->l_name, oldlun->l_ctl_lun);
2029                         changed = 1;
2030                 }
2031                 if (newlun->l_serial != NULL &&
2032                     (oldlun->l_serial == NULL ||
2033                      strcmp(oldlun->l_serial, newlun->l_serial) != 0)) {
2034                         log_debugx("serial for lun \"%s\", "
2035                             "CTL lun %d changed; removing",
2036                             oldlun->l_name, oldlun->l_ctl_lun);
2037                         changed = 1;
2038                 }
2039                 if (changed) {
2040                         error = kernel_lun_remove(oldlun);
2041                         if (error != 0) {
2042                                 log_warnx("failed to remove lun \"%s\", "
2043                                     "CTL lun %d",
2044                                     oldlun->l_name, oldlun->l_ctl_lun);
2045                                 cumulated_error++;
2046                         }
2047                         lun_delete(oldlun);
2048                         continue;
2049                 }
2050
2051                 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun);
2052         }
2053
2054         TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) {
2055                 oldlun = lun_find(oldconf, newlun->l_name);
2056                 if (oldlun != NULL) {
2057                         log_debugx("modifying lun \"%s\", CTL lun %d",
2058                             newlun->l_name, newlun->l_ctl_lun);
2059                         error = kernel_lun_modify(newlun);
2060                         if (error != 0) {
2061                                 log_warnx("failed to "
2062                                     "modify lun \"%s\", CTL lun %d",
2063                                     newlun->l_name, newlun->l_ctl_lun);
2064                                 cumulated_error++;
2065                         }
2066                         continue;
2067                 }
2068                 log_debugx("adding lun \"%s\"", newlun->l_name);
2069                 error = kernel_lun_add(newlun);
2070                 if (error != 0) {
2071                         log_warnx("failed to add lun \"%s\"", newlun->l_name);
2072                         lun_delete(newlun);
2073                         cumulated_error++;
2074                 }
2075         }
2076
2077         /*
2078          * Now add new ports or modify existing ones.
2079          */
2080         TAILQ_FOREACH(newport, &newconf->conf_ports, p_next) {
2081                 if (port_is_dummy(newport))
2082                         continue;
2083                 oldport = port_find(oldconf, newport->p_name);
2084
2085                 if (oldport == NULL || port_is_dummy(oldport)) {
2086                         log_debugx("adding port \"%s\"", newport->p_name);
2087                         error = kernel_port_add(newport);
2088                 } else {
2089                         log_debugx("updating port \"%s\"", newport->p_name);
2090                         newport->p_ctl_port = oldport->p_ctl_port;
2091                         error = kernel_port_update(newport, oldport);
2092                 }
2093                 if (error != 0) {
2094                         log_warnx("failed to %s port %s",
2095                             (oldport == NULL) ? "add" : "update",
2096                             newport->p_name);
2097                         /*
2098                          * XXX: Uncomment after fixing the root cause.
2099                          *
2100                          * cumulated_error++;
2101                          */
2102                 }
2103         }
2104
2105         /*
2106          * Go through the new portals, opening the sockets as necessary.
2107          */
2108         TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
2109                 if (newpg->pg_foreign)
2110                         continue;
2111                 if (newpg->pg_unassigned) {
2112                         log_debugx("not listening on portal-group \"%s\", "
2113                             "not assigned to any target",
2114                             newpg->pg_name);
2115                         continue;
2116                 }
2117                 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) {
2118                         /*
2119                          * Try to find already open portal and reuse
2120                          * the listening socket.  We don't care about
2121                          * what portal or portal group that was, what
2122                          * matters is the listening address.
2123                          */
2124                         TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups,
2125                             pg_next) {
2126                                 TAILQ_FOREACH(oldp, &oldpg->pg_portals,
2127                                     p_next) {
2128                                         if (strcmp(newp->p_listen,
2129                                             oldp->p_listen) == 0 &&
2130                                             oldp->p_socket > 0) {
2131                                                 newp->p_socket =
2132                                                     oldp->p_socket;
2133                                                 oldp->p_socket = 0;
2134                                                 break;
2135                                         }
2136                                 }
2137                         }
2138                         if (newp->p_socket > 0) {
2139                                 /*
2140                                  * We're done with this portal.
2141                                  */
2142                                 continue;
2143                         }
2144
2145 #ifdef ICL_KERNEL_PROXY
2146                         if (proxy_mode) {
2147                                 newpg->pg_conf->conf_portal_id++;
2148                                 newp->p_id = newpg->pg_conf->conf_portal_id;
2149                                 log_debugx("listening on %s, portal-group "
2150                                     "\"%s\", portal id %d, using ICL proxy",
2151                                     newp->p_listen, newpg->pg_name, newp->p_id);
2152                                 kernel_listen(newp->p_ai, newp->p_iser,
2153                                     newp->p_id);
2154                                 continue;
2155                         }
2156 #endif
2157                         assert(proxy_mode == false);
2158                         assert(newp->p_iser == false);
2159
2160                         log_debugx("listening on %s, portal-group \"%s\"",
2161                             newp->p_listen, newpg->pg_name);
2162                         newp->p_socket = socket(newp->p_ai->ai_family,
2163                             newp->p_ai->ai_socktype,
2164                             newp->p_ai->ai_protocol);
2165                         if (newp->p_socket < 0) {
2166                                 log_warn("socket(2) failed for %s",
2167                                     newp->p_listen);
2168                                 cumulated_error++;
2169                                 continue;
2170                         }
2171                         sockbuf = SOCKBUF_SIZE;
2172                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF,
2173                             &sockbuf, sizeof(sockbuf)) == -1)
2174                                 log_warn("setsockopt(SO_RCVBUF) failed "
2175                                     "for %s", newp->p_listen);
2176                         sockbuf = SOCKBUF_SIZE;
2177                         if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF,
2178                             &sockbuf, sizeof(sockbuf)) == -1)
2179                                 log_warn("setsockopt(SO_SNDBUF) failed "
2180                                     "for %s", newp->p_listen);
2181                         error = setsockopt(newp->p_socket, SOL_SOCKET,
2182                             SO_REUSEADDR, &one, sizeof(one));
2183                         if (error != 0) {
2184                                 log_warn("setsockopt(SO_REUSEADDR) failed "
2185                                     "for %s", newp->p_listen);
2186                                 close(newp->p_socket);
2187                                 newp->p_socket = 0;
2188                                 cumulated_error++;
2189                                 continue;
2190                         }
2191                         if (newpg->pg_dscp != -1) {
2192                                 struct sockaddr sa;
2193                                 int len = sizeof(sa);
2194                                 getsockname(newp->p_socket, &sa, &len);
2195                                 /*
2196                                  * Only allow the 6-bit DSCP
2197                                  * field to be modified
2198                                  */
2199                                 int tos = newpg->pg_dscp << 2;
2200                                 if (sa.sa_family == AF_INET) {
2201                                         if (setsockopt(newp->p_socket,
2202                                             IPPROTO_IP, IP_TOS,
2203                                             &tos, sizeof(tos)) == -1)
2204                                                 log_warn("setsockopt(IP_TOS) "
2205                                                     "failed for %s",
2206                                                     newp->p_listen);
2207                                 } else
2208                                 if (sa.sa_family == AF_INET6) {
2209                                         if (setsockopt(newp->p_socket,
2210                                             IPPROTO_IPV6, IPV6_TCLASS,
2211                                             &tos, sizeof(tos)) == -1)
2212                                                 log_warn("setsockopt(IPV6_TCLASS) "
2213                                                     "failed for %s",
2214                                                     newp->p_listen);
2215                                 }
2216                         }
2217                         if (newpg->pg_pcp != -1) {
2218                                 struct sockaddr sa;
2219                                 int len = sizeof(sa);
2220                                 getsockname(newp->p_socket, &sa, &len);
2221                                 /*
2222                                  * Only allow the 6-bit DSCP
2223                                  * field to be modified
2224                                  */
2225                                 int pcp = newpg->pg_pcp;
2226                                 if (sa.sa_family == AF_INET) {
2227                                         if (setsockopt(newp->p_socket,
2228                                             IPPROTO_IP, IP_VLAN_PCP,
2229                                             &pcp, sizeof(pcp)) == -1)
2230                                                 log_warn("setsockopt(IP_VLAN_PCP) "
2231                                                     "failed for %s",
2232                                                     newp->p_listen);
2233                                 } else
2234                                 if (sa.sa_family == AF_INET6) {
2235                                         if (setsockopt(newp->p_socket,
2236                                             IPPROTO_IPV6, IPV6_VLAN_PCP,
2237                                             &pcp, sizeof(pcp)) == -1)
2238                                                 log_warn("setsockopt(IPV6_VLAN_PCP) "
2239                                                     "failed for %s",
2240                                                     newp->p_listen);
2241                                 }
2242                         }
2243                         error = bind(newp->p_socket, newp->p_ai->ai_addr,
2244                             newp->p_ai->ai_addrlen);
2245                         if (error != 0) {
2246                                 log_warn("bind(2) failed for %s",
2247                                     newp->p_listen);
2248                                 close(newp->p_socket);
2249                                 newp->p_socket = 0;
2250                                 cumulated_error++;
2251                                 continue;
2252                         }
2253                         error = listen(newp->p_socket, -1);
2254                         if (error != 0) {
2255                                 log_warn("listen(2) failed for %s",
2256                                     newp->p_listen);
2257                                 close(newp->p_socket);
2258                                 newp->p_socket = 0;
2259                                 cumulated_error++;
2260                                 continue;
2261                         }
2262                 }
2263         }
2264
2265         /*
2266          * Go through the no longer used sockets, closing them.
2267          */
2268         TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) {
2269                 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) {
2270                         if (oldp->p_socket <= 0)
2271                                 continue;
2272                         log_debugx("closing socket for %s, portal-group \"%s\"",
2273                             oldp->p_listen, oldpg->pg_name);
2274                         close(oldp->p_socket);
2275                         oldp->p_socket = 0;
2276                 }
2277         }
2278
2279         /* (Re-)Register on remaining/new iSNS servers. */
2280         TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
2281                 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
2282                         if (strcmp(oldns->i_addr, newns->i_addr) == 0)
2283                                 break;
2284                 }
2285                 isns_register(newns, oldns);
2286         }
2287
2288         /* Schedule iSNS update */
2289         if (!TAILQ_EMPTY(&newconf->conf_isns))
2290                 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2291
2292         return (cumulated_error);
2293 }
2294
2295 bool
2296 timed_out(void)
2297 {
2298
2299         return (sigalrm_received);
2300 }
2301
2302 static void
2303 sigalrm_handler_fatal(int dummy __unused)
2304 {
2305         /*
2306          * It would be easiest to just log an error and exit.  We can't
2307          * do this, though, because log_errx() is not signal safe, since
2308          * it calls syslog(3).  Instead, set a flag checked by pdu_send()
2309          * and pdu_receive(), to call log_errx() there.  Should they fail
2310          * to notice, we'll exit here one second later.
2311          */
2312         if (sigalrm_received) {
2313                 /*
2314                  * Oh well.  Just give up and quit.
2315                  */
2316                 _exit(2);
2317         }
2318
2319         sigalrm_received = true;
2320 }
2321
2322 static void
2323 sigalrm_handler(int dummy __unused)
2324 {
2325
2326         sigalrm_received = true;
2327 }
2328
2329 void
2330 set_timeout(int timeout, int fatal)
2331 {
2332         struct sigaction sa;
2333         struct itimerval itv;
2334         int error;
2335
2336         if (timeout <= 0) {
2337                 log_debugx("session timeout disabled");
2338                 bzero(&itv, sizeof(itv));
2339                 error = setitimer(ITIMER_REAL, &itv, NULL);
2340                 if (error != 0)
2341                         log_err(1, "setitimer");
2342                 sigalrm_received = false;
2343                 return;
2344         }
2345
2346         sigalrm_received = false;
2347         bzero(&sa, sizeof(sa));
2348         if (fatal)
2349                 sa.sa_handler = sigalrm_handler_fatal;
2350         else
2351                 sa.sa_handler = sigalrm_handler;
2352         sigfillset(&sa.sa_mask);
2353         error = sigaction(SIGALRM, &sa, NULL);
2354         if (error != 0)
2355                 log_err(1, "sigaction");
2356
2357         /*
2358          * First SIGALRM will arive after conf_timeout seconds.
2359          * If we do nothing, another one will arrive a second later.
2360          */
2361         log_debugx("setting session timeout to %d seconds", timeout);
2362         bzero(&itv, sizeof(itv));
2363         itv.it_interval.tv_sec = 1;
2364         itv.it_value.tv_sec = timeout;
2365         error = setitimer(ITIMER_REAL, &itv, NULL);
2366         if (error != 0)
2367                 log_err(1, "setitimer");
2368 }
2369
2370 static int
2371 wait_for_children(bool block)
2372 {
2373         pid_t pid;
2374         int status;
2375         int num = 0;
2376
2377         for (;;) {
2378                 /*
2379                  * If "block" is true, wait for at least one process.
2380                  */
2381                 if (block && num == 0)
2382                         pid = wait4(-1, &status, 0, NULL);
2383                 else
2384                         pid = wait4(-1, &status, WNOHANG, NULL);
2385                 if (pid <= 0)
2386                         break;
2387                 if (WIFSIGNALED(status)) {
2388                         log_warnx("child process %d terminated with signal %d",
2389                             pid, WTERMSIG(status));
2390                 } else if (WEXITSTATUS(status) != 0) {
2391                         log_warnx("child process %d terminated with exit status %d",
2392                             pid, WEXITSTATUS(status));
2393                 } else {
2394                         log_debugx("child process %d terminated gracefully", pid);
2395                 }
2396                 num++;
2397         }
2398
2399         return (num);
2400 }
2401
2402 static void
2403 handle_connection(struct portal *portal, int fd,
2404     const struct sockaddr *client_sa, bool dont_fork)
2405 {
2406         struct connection *conn;
2407         int error;
2408         pid_t pid;
2409         char host[NI_MAXHOST + 1];
2410         struct conf *conf;
2411
2412         conf = portal->p_portal_group->pg_conf;
2413
2414         if (dont_fork) {
2415                 log_debugx("incoming connection; not forking due to -d flag");
2416         } else {
2417                 nchildren -= wait_for_children(false);
2418                 assert(nchildren >= 0);
2419
2420                 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) {
2421                         log_debugx("maxproc limit of %d child processes hit; "
2422                             "waiting for child process to exit", conf->conf_maxproc);
2423                         nchildren -= wait_for_children(true);
2424                         assert(nchildren >= 0);
2425                 }
2426                 log_debugx("incoming connection; forking child process #%d",
2427                     nchildren);
2428                 nchildren++;
2429                 pid = fork();
2430                 if (pid < 0)
2431                         log_err(1, "fork");
2432                 if (pid > 0) {
2433                         close(fd);
2434                         return;
2435                 }
2436         }
2437         pidfile_close(conf->conf_pidfh);
2438
2439         error = getnameinfo(client_sa, client_sa->sa_len,
2440             host, sizeof(host), NULL, 0, NI_NUMERICHOST);
2441         if (error != 0)
2442                 log_errx(1, "getnameinfo: %s", gai_strerror(error));
2443
2444         log_debugx("accepted connection from %s; portal group \"%s\"",
2445             host, portal->p_portal_group->pg_name);
2446         log_set_peer_addr(host);
2447         setproctitle("%s", host);
2448
2449         conn = connection_new(portal, fd, host, client_sa);
2450         set_timeout(conf->conf_timeout, true);
2451         kernel_capsicate();
2452         login(conn);
2453         if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
2454                 kernel_handoff(conn);
2455                 log_debugx("connection handed off to the kernel");
2456         } else {
2457                 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
2458                 discovery(conn);
2459         }
2460         log_debugx("nothing more to do; exiting");
2461         exit(0);
2462 }
2463
2464 static int
2465 fd_add(int fd, fd_set *fdset, int nfds)
2466 {
2467
2468         /*
2469          * Skip sockets which we failed to bind.
2470          */
2471         if (fd <= 0)
2472                 return (nfds);
2473
2474         FD_SET(fd, fdset);
2475         if (fd > nfds)
2476                 nfds = fd;
2477         return (nfds);
2478 }
2479
2480 static void
2481 main_loop(struct conf *conf, bool dont_fork)
2482 {
2483         struct portal_group *pg;
2484         struct portal *portal;
2485         struct sockaddr_storage client_sa;
2486         socklen_t client_salen;
2487 #ifdef ICL_KERNEL_PROXY
2488         int connection_id;
2489         int portal_id;
2490 #endif
2491         fd_set fdset;
2492         int error, nfds, client_fd;
2493
2494         pidfile_write(conf->conf_pidfh);
2495
2496         for (;;) {
2497                 if (sighup_received || sigterm_received || timed_out())
2498                         return;
2499
2500 #ifdef ICL_KERNEL_PROXY
2501                 if (proxy_mode) {
2502                         client_salen = sizeof(client_sa);
2503                         kernel_accept(&connection_id, &portal_id,
2504                             (struct sockaddr *)&client_sa, &client_salen);
2505                         assert(client_salen >= client_sa.ss_len);
2506
2507                         log_debugx("incoming connection, id %d, portal id %d",
2508                             connection_id, portal_id);
2509                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2510                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2511                                         if (portal->p_id == portal_id) {
2512                                                 goto found;
2513                                         }
2514                                 }
2515                         }
2516
2517                         log_errx(1, "kernel returned invalid portal_id %d",
2518                             portal_id);
2519
2520 found:
2521                         handle_connection(portal, connection_id,
2522                             (struct sockaddr *)&client_sa, dont_fork);
2523                 } else {
2524 #endif
2525                         assert(proxy_mode == false);
2526
2527                         FD_ZERO(&fdset);
2528                         nfds = 0;
2529                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2530                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
2531                                         nfds = fd_add(portal->p_socket, &fdset, nfds);
2532                         }
2533                         error = select(nfds + 1, &fdset, NULL, NULL, NULL);
2534                         if (error <= 0) {
2535                                 if (errno == EINTR)
2536                                         return;
2537                                 log_err(1, "select");
2538                         }
2539                         TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2540                                 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2541                                         if (!FD_ISSET(portal->p_socket, &fdset))
2542                                                 continue;
2543                                         client_salen = sizeof(client_sa);
2544                                         client_fd = accept(portal->p_socket,
2545                                             (struct sockaddr *)&client_sa,
2546                                             &client_salen);
2547                                         if (client_fd < 0) {
2548                                                 if (errno == ECONNABORTED)
2549                                                         continue;
2550                                                 log_err(1, "accept");
2551                                         }
2552                                         assert(client_salen >= client_sa.ss_len);
2553
2554                                         handle_connection(portal, client_fd,
2555                                             (struct sockaddr *)&client_sa,
2556                                             dont_fork);
2557                                         break;
2558                                 }
2559                         }
2560 #ifdef ICL_KERNEL_PROXY
2561                 }
2562 #endif
2563         }
2564 }
2565
2566 static void
2567 sighup_handler(int dummy __unused)
2568 {
2569
2570         sighup_received = true;
2571 }
2572
2573 static void
2574 sigterm_handler(int dummy __unused)
2575 {
2576
2577         sigterm_received = true;
2578 }
2579
2580 static void
2581 sigchld_handler(int dummy __unused)
2582 {
2583
2584         /*
2585          * The only purpose of this handler is to make SIGCHLD
2586          * interrupt the ISCSIDWAIT ioctl(2), so we can call
2587          * wait_for_children().
2588          */
2589 }
2590
2591 static void
2592 register_signals(void)
2593 {
2594         struct sigaction sa;
2595         int error;
2596
2597         bzero(&sa, sizeof(sa));
2598         sa.sa_handler = sighup_handler;
2599         sigfillset(&sa.sa_mask);
2600         error = sigaction(SIGHUP, &sa, NULL);
2601         if (error != 0)
2602                 log_err(1, "sigaction");
2603
2604         sa.sa_handler = sigterm_handler;
2605         error = sigaction(SIGTERM, &sa, NULL);
2606         if (error != 0)
2607                 log_err(1, "sigaction");
2608
2609         sa.sa_handler = sigterm_handler;
2610         error = sigaction(SIGINT, &sa, NULL);
2611         if (error != 0)
2612                 log_err(1, "sigaction");
2613
2614         sa.sa_handler = sigchld_handler;
2615         error = sigaction(SIGCHLD, &sa, NULL);
2616         if (error != 0)
2617                 log_err(1, "sigaction");
2618 }
2619
2620 static void
2621 check_perms(const char *path)
2622 {
2623         struct stat sb;
2624         int error;
2625
2626         error = stat(path, &sb);
2627         if (error != 0) {
2628                 log_warn("stat");
2629                 return;
2630         }
2631         if (sb.st_mode & S_IWOTH) {
2632                 log_warnx("%s is world-writable", path);
2633         } else if (sb.st_mode & S_IROTH) {
2634                 log_warnx("%s is world-readable", path);
2635         } else if (sb.st_mode & S_IXOTH) {
2636                 /*
2637                  * Ok, this one doesn't matter, but still do it,
2638                  * just for consistency.
2639                  */
2640                 log_warnx("%s is world-executable", path);
2641         }
2642
2643         /*
2644          * XXX: Should we also check for owner != 0?
2645          */
2646 }
2647
2648 static struct conf *
2649 conf_new_from_file(const char *path, struct conf *oldconf, bool ucl)
2650 {
2651         struct conf *conf;
2652         struct auth_group *ag;
2653         struct portal_group *pg;
2654         struct pport *pp;
2655         int error;
2656
2657         log_debugx("obtaining configuration from %s", path);
2658
2659         conf = conf_new();
2660
2661         TAILQ_FOREACH(pp, &oldconf->conf_pports, pp_next)
2662                 pport_copy(pp, conf);
2663
2664         ag = auth_group_new(conf, "default");
2665         assert(ag != NULL);
2666
2667         ag = auth_group_new(conf, "no-authentication");
2668         assert(ag != NULL);
2669         ag->ag_type = AG_TYPE_NO_AUTHENTICATION;
2670
2671         ag = auth_group_new(conf, "no-access");
2672         assert(ag != NULL);
2673         ag->ag_type = AG_TYPE_DENY;
2674
2675         pg = portal_group_new(conf, "default");
2676         assert(pg != NULL);
2677
2678         if (ucl)
2679                 error = uclparse_conf(conf, path);
2680         else
2681                 error = parse_conf(conf, path);
2682
2683         if (error != 0) {
2684                 conf_delete(conf);
2685                 return (NULL);
2686         }
2687
2688         check_perms(path);
2689
2690         if (conf->conf_default_ag_defined == false) {
2691                 log_debugx("auth-group \"default\" not defined; "
2692                     "going with defaults");
2693                 ag = auth_group_find(conf, "default");
2694                 assert(ag != NULL);
2695                 ag->ag_type = AG_TYPE_DENY;
2696         }
2697
2698         if (conf->conf_default_pg_defined == false) {
2699                 log_debugx("portal-group \"default\" not defined; "
2700                     "going with defaults");
2701                 pg = portal_group_find(conf, "default");
2702                 assert(pg != NULL);
2703                 portal_group_add_listen(pg, "0.0.0.0:3260", false);
2704                 portal_group_add_listen(pg, "[::]:3260", false);
2705         }
2706
2707         conf->conf_kernel_port_on = true;
2708
2709         error = conf_verify(conf);
2710         if (error != 0) {
2711                 conf_delete(conf);
2712                 return (NULL);
2713         }
2714
2715         return (conf);
2716 }
2717
2718 int
2719 main(int argc, char **argv)
2720 {
2721         struct conf *oldconf, *newconf, *tmpconf;
2722         struct isns *newns;
2723         const char *config_path = DEFAULT_CONFIG_PATH;
2724         int debug = 0, ch, error;
2725         bool dont_daemonize = false;
2726         bool test_config = false;
2727         bool use_ucl = false;
2728
2729         while ((ch = getopt(argc, argv, "dtuf:R")) != -1) {
2730                 switch (ch) {
2731                 case 'd':
2732                         dont_daemonize = true;
2733                         debug++;
2734                         break;
2735                 case 't':
2736                         test_config = true;
2737                         break;
2738                 case 'u':
2739                         use_ucl = true;
2740                         break;
2741                 case 'f':
2742                         config_path = optarg;
2743                         break;
2744                 case 'R':
2745 #ifndef ICL_KERNEL_PROXY
2746                         log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY "
2747                             "does not support iSER protocol");
2748 #endif
2749                         proxy_mode = true;
2750                         break;
2751                 case '?':
2752                 default:
2753                         usage();
2754                 }
2755         }
2756         argc -= optind;
2757         if (argc != 0)
2758                 usage();
2759
2760         log_init(debug);
2761         kernel_init();
2762
2763         oldconf = conf_new_from_kernel();
2764         newconf = conf_new_from_file(config_path, oldconf, use_ucl);
2765
2766         if (newconf == NULL)
2767                 log_errx(1, "configuration error; exiting");
2768
2769         if (test_config)
2770                 return (0);
2771
2772         if (debug > 0) {
2773                 oldconf->conf_debug = debug;
2774                 newconf->conf_debug = debug;
2775         }
2776
2777         error = conf_apply(oldconf, newconf);
2778         if (error != 0)
2779                 log_errx(1, "failed to apply configuration; exiting");
2780
2781         conf_delete(oldconf);
2782         oldconf = NULL;
2783
2784         register_signals();
2785
2786         if (dont_daemonize == false) {
2787                 log_debugx("daemonizing");
2788                 if (daemon(0, 0) == -1) {
2789                         log_warn("cannot daemonize");
2790                         pidfile_remove(newconf->conf_pidfh);
2791                         exit(1);
2792                 }
2793         }
2794
2795         /* Schedule iSNS update */
2796         if (!TAILQ_EMPTY(&newconf->conf_isns))
2797                 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2798
2799         for (;;) {
2800                 main_loop(newconf, dont_daemonize);
2801                 if (sighup_received) {
2802                         sighup_received = false;
2803                         log_debugx("received SIGHUP, reloading configuration");
2804                         tmpconf = conf_new_from_file(config_path, newconf,
2805                             use_ucl);
2806
2807                         if (tmpconf == NULL) {
2808                                 log_warnx("configuration error, "
2809                                     "continuing with old configuration");
2810                         } else {
2811                                 if (debug > 0)
2812                                         tmpconf->conf_debug = debug;
2813                                 oldconf = newconf;
2814                                 newconf = tmpconf;
2815                                 error = conf_apply(oldconf, newconf);
2816                                 if (error != 0)
2817                                         log_warnx("failed to reload "
2818                                             "configuration");
2819                                 conf_delete(oldconf);
2820                                 oldconf = NULL;
2821                         }
2822                 } else if (sigterm_received) {
2823                         log_debugx("exiting on signal; "
2824                             "reloading empty configuration");
2825
2826                         log_debugx("removing CTL iSCSI ports "
2827                             "and terminating all connections");
2828
2829                         oldconf = newconf;
2830                         newconf = conf_new();
2831                         if (debug > 0)
2832                                 newconf->conf_debug = debug;
2833                         error = conf_apply(oldconf, newconf);
2834                         if (error != 0)
2835                                 log_warnx("failed to apply configuration");
2836                         conf_delete(oldconf);
2837                         oldconf = NULL;
2838
2839                         log_warnx("exiting on signal");
2840                         exit(0);
2841                 } else {
2842                         nchildren -= wait_for_children(false);
2843                         assert(nchildren >= 0);
2844                         if (timed_out()) {
2845                                 set_timeout(0, false);
2846                                 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next)
2847                                         isns_check(newns);
2848                                 /* Schedule iSNS update */
2849                                 if (!TAILQ_EMPTY(&newconf->conf_isns)) {
2850                                         set_timeout((newconf->conf_isns_period
2851                                             + 2) / 3,
2852                                             false);
2853                                 }
2854                         }
2855                 }
2856         }
2857         /* NOTREACHED */
2858 }