usr.sbin/ctld/ctld.c

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