1/*-
2 * Copyright (c) 2012 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Edward Tomasz Napierala under sponsorship
6 * from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: stable/10/usr.sbin/ctld/ctld.c 274939 2014-11-24 00:47:04Z mav $");
33
34#include <sys/types.h>
35#include <sys/time.h>
36#include <sys/socket.h>
37#include <sys/wait.h>
38#include <netinet/in.h>
39#include <arpa/inet.h>
40#include <assert.h>
41#include <ctype.h>
42#include <errno.h>
43#include <netdb.h>
44#include <signal.h>
45#include <stdbool.h>
46#include <stdio.h>
47#include <stdint.h>
48#include <stdlib.h>
49#include <string.h>
50#include <unistd.h>
51
52#include "ctld.h"
53#include "isns.h"
54
55bool proxy_mode = false;
56
57static volatile bool sighup_received = false;
58static volatile bool sigterm_received = false;
59static volatile bool sigalrm_received = false;
60
61static int nchildren = 0;
62
63static void
64usage(void)
65{
66
67 fprintf(stderr, "usage: ctld [-d][-f config-file]\n");
68 exit(1);
69}
70
71char *
72checked_strdup(const char *s)
73{
74 char *c;
75
76 c = strdup(s);
77 if (c == NULL)
78 log_err(1, "strdup");
79 return (c);
80}
81
82struct conf *
83conf_new(void)
84{
85 struct conf *conf;
86
87 conf = calloc(1, sizeof(*conf));
88 if (conf == NULL)
89 log_err(1, "calloc");
90 TAILQ_INIT(&conf->conf_targets);
91 TAILQ_INIT(&conf->conf_auth_groups);
92 TAILQ_INIT(&conf->conf_portal_groups);
93 TAILQ_INIT(&conf->conf_isns);
94
95 conf->conf_isns_period = 900;
96 conf->conf_isns_timeout = 5;
97 conf->conf_debug = 0;
98 conf->conf_timeout = 60;
99 conf->conf_maxproc = 30;
100
101 return (conf);
102}
103
104void
105conf_delete(struct conf *conf)
106{
107 struct target *targ, *tmp;
108 struct auth_group *ag, *cagtmp;
109 struct portal_group *pg, *cpgtmp;
110 struct isns *is, *istmp;
111
112 assert(conf->conf_pidfh == NULL);
113
114 TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp)
115 target_delete(targ);
116 TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp)
117 auth_group_delete(ag);
118 TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp)
119 portal_group_delete(pg);
120 TAILQ_FOREACH_SAFE(is, &conf->conf_isns, i_next, istmp)
121 isns_delete(is);
122 free(conf->conf_pidfile_path);
123 free(conf);
124}
125
126static struct auth *
127auth_new(struct auth_group *ag)
128{
129 struct auth *auth;
130
131 auth = calloc(1, sizeof(*auth));
132 if (auth == NULL)
133 log_err(1, "calloc");
134 auth->a_auth_group = ag;
135 TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next);
136 return (auth);
137}
138
139static void
140auth_delete(struct auth *auth)
141{
142 TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next);
143
144 free(auth->a_user);
145 free(auth->a_secret);
146 free(auth->a_mutual_user);
147 free(auth->a_mutual_secret);
148 free(auth);
149}
150
151const struct auth *
152auth_find(const struct auth_group *ag, const char *user)
153{
154 const struct auth *auth;
155
156 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) {
157 if (strcmp(auth->a_user, user) == 0)
158 return (auth);
159 }
160
161 return (NULL);
162}
163
164static void
165auth_check_secret_length(struct auth *auth)
166{
167 size_t len;
168
169 len = strlen(auth->a_secret);
170 if (len > 16) {
171 if (auth->a_auth_group->ag_name != NULL)
172 log_warnx("secret for user \"%s\", auth-group \"%s\", "
173 "is too long; it should be at most 16 characters "
174 "long", auth->a_user, auth->a_auth_group->ag_name);
175 else
176 log_warnx("secret for user \"%s\", target \"%s\", "
177 "is too long; it should be at most 16 characters "
178 "long", auth->a_user,
179 auth->a_auth_group->ag_target->t_name);
180 }
181 if (len < 12) {
182 if (auth->a_auth_group->ag_name != NULL)
183 log_warnx("secret for user \"%s\", auth-group \"%s\", "
184 "is too short; it should be at least 12 characters "
185 "long", auth->a_user,
186 auth->a_auth_group->ag_name);
187 else
188 log_warnx("secret for user \"%s\", target \"%s\", "
189 "is too short; it should be at least 16 characters "
190 "long", auth->a_user,
191 auth->a_auth_group->ag_target->t_name);
192 }
193
194 if (auth->a_mutual_secret != NULL) {
195 len = strlen(auth->a_secret);
196 if (len > 16) {
197 if (auth->a_auth_group->ag_name != NULL)
198 log_warnx("mutual secret for user \"%s\", "
199 "auth-group \"%s\", is too long; it should "
200 "be at most 16 characters long",
201 auth->a_user, auth->a_auth_group->ag_name);
202 else
203 log_warnx("mutual secret for user \"%s\", "
204 "target \"%s\", is too long; it should "
205 "be at most 16 characters long",
206 auth->a_user,
207 auth->a_auth_group->ag_target->t_name);
208 }
209 if (len < 12) {
210 if (auth->a_auth_group->ag_name != NULL)
211 log_warnx("mutual secret for user \"%s\", "
212 "auth-group \"%s\", is too short; it "
213 "should be at least 12 characters long",
214 auth->a_user, auth->a_auth_group->ag_name);
215 else
216 log_warnx("mutual secret for user \"%s\", "
217 "target \"%s\", is too short; it should be "
218 "at least 16 characters long",
219 auth->a_user,
220 auth->a_auth_group->ag_target->t_name);
221 }
222 }
223}
224
225const struct auth *
226auth_new_chap(struct auth_group *ag, const char *user,
227 const char *secret)
228{
229 struct auth *auth;
230
231 if (ag->ag_type == AG_TYPE_UNKNOWN)
232 ag->ag_type = AG_TYPE_CHAP;
233 if (ag->ag_type != AG_TYPE_CHAP) {
234 if (ag->ag_name != NULL)
235 log_warnx("cannot mix \"chap\" authentication with "
236 "other types for auth-group \"%s\"", ag->ag_name);
237 else
238 log_warnx("cannot mix \"chap\" authentication with "
239 "other types for target \"%s\"",
240 ag->ag_target->t_name);
241 return (NULL);
242 }
243
244 auth = auth_new(ag);
245 auth->a_user = checked_strdup(user);
246 auth->a_secret = checked_strdup(secret);
247
248 auth_check_secret_length(auth);
249
250 return (auth);
251}
252
253const struct auth *
254auth_new_chap_mutual(struct auth_group *ag, const char *user,
255 const char *secret, const char *user2, const char *secret2)
256{
257 struct auth *auth;
258
259 if (ag->ag_type == AG_TYPE_UNKNOWN)
260 ag->ag_type = AG_TYPE_CHAP_MUTUAL;
261 if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) {
262 if (ag->ag_name != NULL)
263 log_warnx("cannot mix \"chap-mutual\" authentication "
264 "with other types for auth-group \"%s\"",
265 ag->ag_name);
266 else
267 log_warnx("cannot mix \"chap-mutual\" authentication "
268 "with other types for target \"%s\"",
269 ag->ag_target->t_name);
270 return (NULL);
271 }
272
273 auth = auth_new(ag);
274 auth->a_user = checked_strdup(user);
275 auth->a_secret = checked_strdup(secret);
276 auth->a_mutual_user = checked_strdup(user2);
277 auth->a_mutual_secret = checked_strdup(secret2);
278
279 auth_check_secret_length(auth);
280
281 return (auth);
282}
283
284const struct auth_name *
285auth_name_new(struct auth_group *ag, const char *name)
286{
287 struct auth_name *an;
288
289 an = calloc(1, sizeof(*an));
290 if (an == NULL)
291 log_err(1, "calloc");
292 an->an_auth_group = ag;
293 an->an_initator_name = checked_strdup(name);
294 TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next);
295 return (an);
296}
297
298static void
299auth_name_delete(struct auth_name *an)
300{
301 TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next);
302
303 free(an->an_initator_name);
304 free(an);
305}
306
307bool
308auth_name_defined(const struct auth_group *ag)
309{
310 if (TAILQ_EMPTY(&ag->ag_names))
311 return (false);
312 return (true);
313}
314
315const struct auth_name *
316auth_name_find(const struct auth_group *ag, const char *name)
317{
318 const struct auth_name *auth_name;
319
320 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) {
321 if (strcmp(auth_name->an_initator_name, name) == 0)
322 return (auth_name);
323 }
324
325 return (NULL);
326}
327
328const struct auth_portal *
329auth_portal_new(struct auth_group *ag, const char *portal)
330{
331 struct auth_portal *ap;
332 char *net, *mask, *str, *tmp;
333 int len, dm, m;
334
335 ap = calloc(1, sizeof(*ap));
336 if (ap == NULL)
337 log_err(1, "calloc");
338 ap->ap_auth_group = ag;
339 ap->ap_initator_portal = checked_strdup(portal);
340 mask = str = checked_strdup(portal);
341 net = strsep(&mask, "/");
342 if (net[0] == '[')
343 net++;
344 len = strlen(net);
345 if (len == 0)
346 goto error;
347 if (net[len - 1] == ']')
348 net[len - 1] = 0;
349 if (strchr(net, ':') != NULL) {
350 struct sockaddr_in6 *sin6 =
351 (struct sockaddr_in6 *)&ap->ap_sa;
352
353 sin6->sin6_len = sizeof(*sin6);
354 sin6->sin6_family = AF_INET6;
355 if (inet_pton(AF_INET6, net, &sin6->sin6_addr) <= 0)
356 goto error;
357 dm = 128;
358 } else {
359 struct sockaddr_in *sin =
360 (struct sockaddr_in *)&ap->ap_sa;
361
362 sin->sin_len = sizeof(*sin);
363 sin->sin_family = AF_INET;
364 if (inet_pton(AF_INET, net, &sin->sin_addr) <= 0)
365 goto error;
366 dm = 32;
367 }
368 if (mask != NULL) {
369 m = strtol(mask, &tmp, 0);
370 if (m < 0 || m > dm || tmp[0] != 0)
371 goto error;
372 } else
373 m = dm;
374 ap->ap_mask = m;
375 free(str);
376 TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next);
377 return (ap);
378
379error:
380 log_errx(1, "Incorrect initiator portal '%s'", portal);
381 return (NULL);
382}
383
384static void
385auth_portal_delete(struct auth_portal *ap)
386{
387 TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next);
388
389 free(ap->ap_initator_portal);
390 free(ap);
391}
392
393bool
394auth_portal_defined(const struct auth_group *ag)
395{
396 if (TAILQ_EMPTY(&ag->ag_portals))
397 return (false);
398 return (true);
399}
400
401const struct auth_portal *
402auth_portal_find(const struct auth_group *ag, const struct sockaddr_storage *ss)
403{
404 const struct auth_portal *ap;
405 const uint8_t *a, *b;
406 int i;
407 uint8_t bmask;
408
409 TAILQ_FOREACH(ap, &ag->ag_portals, ap_next) {
410 if (ap->ap_sa.ss_family != ss->ss_family)
411 continue;
412 if (ss->ss_family == AF_INET) {
413 a = (const uint8_t *)
414 &((const struct sockaddr_in *)ss)->sin_addr;
415 b = (const uint8_t *)
416 &((const struct sockaddr_in *)&ap->ap_sa)->sin_addr;
417 } else {
418 a = (const uint8_t *)
419 &((const struct sockaddr_in6 *)ss)->sin6_addr;
420 b = (const uint8_t *)
421 &((const struct sockaddr_in6 *)&ap->ap_sa)->sin6_addr;
422 }
423 for (i = 0; i < ap->ap_mask / 8; i++) {
424 if (a[i] != b[i])
425 goto next;
426 }
427 if (ap->ap_mask % 8) {
428 bmask = 0xff << (8 - (ap->ap_mask % 8));
429 if ((a[i] & bmask) != (b[i] & bmask))
430 goto next;
431 }
432 return (ap);
433next:
434 ;
435 }
436
437 return (NULL);
438}
439
440struct auth_group *
441auth_group_new(struct conf *conf, const char *name)
442{
443 struct auth_group *ag;
444
445 if (name != NULL) {
446 ag = auth_group_find(conf, name);
447 if (ag != NULL) {
448 log_warnx("duplicated auth-group \"%s\"", name);
449 return (NULL);
450 }
451 }
452
453 ag = calloc(1, sizeof(*ag));
454 if (ag == NULL)
455 log_err(1, "calloc");
456 if (name != NULL)
457 ag->ag_name = checked_strdup(name);
458 TAILQ_INIT(&ag->ag_auths);
459 TAILQ_INIT(&ag->ag_names);
460 TAILQ_INIT(&ag->ag_portals);
461 ag->ag_conf = conf;
462 TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next);
463
464 return (ag);
465}
466
467void
468auth_group_delete(struct auth_group *ag)
469{
470 struct auth *auth, *auth_tmp;
471 struct auth_name *auth_name, *auth_name_tmp;
472 struct auth_portal *auth_portal, *auth_portal_tmp;
473
474 TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next);
475
476 TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp)
477 auth_delete(auth);
478 TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp)
479 auth_name_delete(auth_name);
480 TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next,
481 auth_portal_tmp)
482 auth_portal_delete(auth_portal);
483 free(ag->ag_name);
484 free(ag);
485}
486
487struct auth_group *
488auth_group_find(const struct conf *conf, const char *name)
489{
490 struct auth_group *ag;
491
492 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
493 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0)
494 return (ag);
495 }
496
497 return (NULL);
498}
499
500static int
501auth_group_set_type(struct auth_group *ag, int type)
502{
503
504 if (ag->ag_type == AG_TYPE_UNKNOWN) {
505 ag->ag_type = type;
506 return (0);
507 }
508
509 if (ag->ag_type == type)
510 return (0);
511
512 return (1);
513}
514
515int
516auth_group_set_type_str(struct auth_group *ag, const char *str)
517{
518 int error, type;
519
520 if (strcmp(str, "none") == 0) {
521 type = AG_TYPE_NO_AUTHENTICATION;
522 } else if (strcmp(str, "deny") == 0) {
523 type = AG_TYPE_DENY;
524 } else if (strcmp(str, "chap") == 0) {
525 type = AG_TYPE_CHAP;
526 } else if (strcmp(str, "chap-mutual") == 0) {
527 type = AG_TYPE_CHAP_MUTUAL;
528 } else {
529 if (ag->ag_name != NULL)
530 log_warnx("invalid auth-type \"%s\" for auth-group "
531 "\"%s\"", str, ag->ag_name);
532 else
533 log_warnx("invalid auth-type \"%s\" for target "
534 "\"%s\"", str, ag->ag_target->t_name);
535 return (1);
536 }
537
538 error = auth_group_set_type(ag, type);
539 if (error != 0) {
540 if (ag->ag_name != NULL)
541 log_warnx("cannot set auth-type to \"%s\" for "
542 "auth-group \"%s\"; already has a different "
543 "type", str, ag->ag_name);
544 else
545 log_warnx("cannot set auth-type to \"%s\" for target "
546 "\"%s\"; already has a different type",
547 str, ag->ag_target->t_name);
548 return (1);
549 }
550
551 return (error);
552}
553
554static struct portal *
555portal_new(struct portal_group *pg)
556{
557 struct portal *portal;
558
559 portal = calloc(1, sizeof(*portal));
560 if (portal == NULL)
561 log_err(1, "calloc");
562 TAILQ_INIT(&portal->p_targets);
563 portal->p_portal_group = pg;
564 TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next);
565 return (portal);
566}
567
568static void
569portal_delete(struct portal *portal)
570{
571
572 TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next);
573 if (portal->p_ai != NULL)
574 freeaddrinfo(portal->p_ai);
575 free(portal->p_listen);
576 free(portal);
577}
578
579struct portal_group *
580portal_group_new(struct conf *conf, const char *name)
581{
582 struct portal_group *pg;
583
584 pg = portal_group_find(conf, name);
585 if (pg != NULL) {
586 log_warnx("duplicated portal-group \"%s\"", name);
587 return (NULL);
588 }
589
590 pg = calloc(1, sizeof(*pg));
591 if (pg == NULL)
592 log_err(1, "calloc");
593 pg->pg_name = checked_strdup(name);
594 TAILQ_INIT(&pg->pg_portals);
595 pg->pg_conf = conf;
596 conf->conf_last_portal_group_tag++;
597 pg->pg_tag = conf->conf_last_portal_group_tag;
598 TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next);
599
600 return (pg);
601}
602
603void
604portal_group_delete(struct portal_group *pg)
605{
606 struct portal *portal, *tmp;
607
608 TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next);
609
610 TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp)
611 portal_delete(portal);
612 free(pg->pg_name);
613 free(pg);
614}
615
616struct portal_group *
617portal_group_find(const struct conf *conf, const char *name)
618{
619 struct portal_group *pg;
620
621 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
622 if (strcmp(pg->pg_name, name) == 0)
623 return (pg);
624 }
625
626 return (NULL);
627}
628
629static int
630parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai)
631{
632 struct addrinfo hints;
633 char *addr, *ch;
634 const char *port;
635 int error, colons = 0;
636
637 if (arg[0] == '[') {
638 /*
639 * IPv6 address in square brackets, perhaps with port.
640 */
641 arg++;
642 addr = strsep(&arg, "]");
643 if (arg == NULL)
644 return (1);
645 if (arg[0] == '\0') {
646 port = def_port;
647 } else if (arg[0] == ':') {
648 port = arg + 1;
649 } else
650 return (1);
651 } else {
652 /*
653 * Either IPv6 address without brackets - and without
654 * a port - or IPv4 address. Just count the colons.
655 */
656 for (ch = arg; *ch != '\0'; ch++) {
657 if (*ch == ':')
658 colons++;
659 }
660 if (colons > 1) {
661 addr = arg;
662 port = def_port;
663 } else {
664 addr = strsep(&arg, ":");
665 if (arg == NULL)
666 port = def_port;
667 else
668 port = arg;
669 }
670 }
671
672 memset(&hints, 0, sizeof(hints));
673 hints.ai_family = PF_UNSPEC;
674 hints.ai_socktype = SOCK_STREAM;
675 hints.ai_flags = AI_PASSIVE;
676 error = getaddrinfo(addr, port, &hints, ai);
677 if (error != 0)
678 return (1);
679 return (0);
680}
681
682int
683portal_group_add_listen(struct portal_group *pg, const char *value, bool iser)
684{
685 struct portal *portal;
686
687 portal = portal_new(pg);
688 portal->p_listen = checked_strdup(value);
689 portal->p_iser = iser;
690
691 if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) {
692 log_warnx("invalid listen address %s", portal->p_listen);
693 portal_delete(portal);
694 return (1);
695 }
696
697 /*
698 * XXX: getaddrinfo(3) may return multiple addresses; we should turn
699 * those into multiple portals.
700 */
701
702 return (0);
703}
704
705int
706isns_new(struct conf *conf, const char *addr)
707{
708 struct isns *isns;
709
710 isns = calloc(1, sizeof(*isns));
711 if (isns == NULL)
712 log_err(1, "calloc");
713 isns->i_conf = conf;
714 TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next);
715 isns->i_addr = checked_strdup(addr);
716
717 if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) {
718 log_warnx("invalid iSNS address %s", isns->i_addr);
719 isns_delete(isns);
720 return (1);
721 }
722
723 /*
724 * XXX: getaddrinfo(3) may return multiple addresses; we should turn
725 * those into multiple servers.
726 */
727
728 return (0);
729}
730
731void
732isns_delete(struct isns *isns)
733{
734
735 TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next);
736 free(isns->i_addr);
737 if (isns->i_ai != NULL)
738 freeaddrinfo(isns->i_ai);
739 free(isns);
740}
741
742static int
743isns_do_connect(struct isns *isns)
744{
745 int s;
746
747 s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype,
748 isns->i_ai->ai_protocol);
749 if (s < 0) {
750 log_warn("socket(2) failed for %s", isns->i_addr);
751 return (-1);
752 }
753 if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) {
754 log_warn("connect(2) failed for %s", isns->i_addr);
755 close(s);
756 return (-1);
757 }
758 return(s);
759}
760
761static int
762isns_do_register(struct isns *isns, int s, const char *hostname)
763{
764 struct conf *conf = isns->i_conf;
765 struct target *target;
766 struct portal *portal;
767 struct portal_group *pg;
768 struct isns_req *req;
769 int res = 0;
770 uint32_t error;
771
772 req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT);
773 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
774 isns_req_add_delim(req);
775 isns_req_add_str(req, 1, hostname);
776 isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */
777 isns_req_add_32(req, 6, conf->conf_isns_period);
778 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
779 if (pg->pg_unassigned)
780 continue;
781 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
782 isns_req_add_addr(req, 16, portal->p_ai);
783 isns_req_add_port(req, 17, portal->p_ai);
784 }
785 }
786 TAILQ_FOREACH(target, &conf->conf_targets, t_next) {
787 isns_req_add_str(req, 32, target->t_name);
788 isns_req_add_32(req, 33, 1); /* 1 -- Target*/
789 if (target->t_alias != NULL)
790 isns_req_add_str(req, 34, target->t_alias);
791 pg = target->t_portal_group;
792 isns_req_add_32(req, 51, pg->pg_tag);
793 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
794 isns_req_add_addr(req, 49, portal->p_ai);
795 isns_req_add_port(req, 50, portal->p_ai);
796 }
797 }
798 res = isns_req_send(s, req);
799 if (res < 0) {
800 log_warn("send(2) failed for %s", isns->i_addr);
801 goto quit;
802 }
803 res = isns_req_receive(s, req);
804 if (res < 0) {
805 log_warn("receive(2) failed for %s", isns->i_addr);
806 goto quit;
807 }
808 error = isns_req_get_status(req);
809 if (error != 0) {
810 log_warnx("iSNS register error %d for %s", error, isns->i_addr);
811 res = -1;
812 }
813quit:
814 isns_req_free(req);
815 return (res);
816}
817
818static int
819isns_do_check(struct isns *isns, int s, const char *hostname)
820{
821 struct conf *conf = isns->i_conf;
822 struct isns_req *req;
823 int res = 0;
824 uint32_t error;
825
826 req = isns_req_create(ISNS_FUNC_DEVATTRQRY, ISNS_FLAG_CLIENT);
827 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
828 isns_req_add_str(req, 1, hostname);
829 isns_req_add_delim(req);
830 isns_req_add(req, 2, 0, NULL);
831 res = isns_req_send(s, req);
832 if (res < 0) {
833 log_warn("send(2) failed for %s", isns->i_addr);
834 goto quit;
835 }
836 res = isns_req_receive(s, req);
837 if (res < 0) {
838 log_warn("receive(2) failed for %s", isns->i_addr);
839 goto quit;
840 }
841 error = isns_req_get_status(req);
842 if (error != 0) {
843 log_warnx("iSNS check error %d for %s", error, isns->i_addr);
844 res = -1;
845 }
846quit:
847 isns_req_free(req);
848 return (res);
849}
850
851static int
852isns_do_deregister(struct isns *isns, int s, const char *hostname)
853{
854 struct conf *conf = isns->i_conf;
855 struct isns_req *req;
856 int res = 0;
857 uint32_t error;
858
859 req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT);
860 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
861 isns_req_add_delim(req);
862 isns_req_add_str(req, 1, hostname);
863 res = isns_req_send(s, req);
864 if (res < 0) {
865 log_warn("send(2) failed for %s", isns->i_addr);
866 goto quit;
867 }
868 res = isns_req_receive(s, req);
869 if (res < 0) {
870 log_warn("receive(2) failed for %s", isns->i_addr);
871 goto quit;
872 }
873 error = isns_req_get_status(req);
874 if (error != 0) {
875 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr);
876 res = -1;
877 }
878quit:
879 isns_req_free(req);
880 return (res);
881}
882
883void
884isns_register(struct isns *isns, struct isns *oldisns)
885{
886 struct conf *conf = isns->i_conf;
887 int s, res;
888 char hostname[256];
889
890 if (TAILQ_EMPTY(&conf->conf_targets) ||
891 TAILQ_EMPTY(&conf->conf_portal_groups))
892 return;
893 set_timeout(conf->conf_isns_timeout, false);
894 s = isns_do_connect(isns);
895 if (s < 0) {
896 set_timeout(0, false);
897 return;
898 }
899 gethostname(hostname, sizeof(hostname));
900
901 if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets))
902 oldisns = isns;
903 res = isns_do_deregister(oldisns, s, hostname);
904 res = isns_do_register(isns, s, hostname);
905 close(s);
906 set_timeout(0, false);
907}
908
909void
910isns_check(struct isns *isns)
911{
912 struct conf *conf = isns->i_conf;
913 int s, res;
914 char hostname[256];
915
916 if (TAILQ_EMPTY(&conf->conf_targets) ||
917 TAILQ_EMPTY(&conf->conf_portal_groups))
918 return;
919 set_timeout(conf->conf_isns_timeout, false);
920 s = isns_do_connect(isns);
921 if (s < 0) {
922 set_timeout(0, false);
923 return;
924 }
925 gethostname(hostname, sizeof(hostname));
926
927 res = isns_do_check(isns, s, hostname);
928 if (res < 0) {
929 res = isns_do_deregister(isns, s, hostname);
930 res = isns_do_register(isns, s, hostname);
931 }
932 close(s);
933 set_timeout(0, false);
934}
935
936void
937isns_deregister(struct isns *isns)
938{
939 struct conf *conf = isns->i_conf;
940 int s, res;
941 char hostname[256];
942
943 if (TAILQ_EMPTY(&conf->conf_targets) ||
944 TAILQ_EMPTY(&conf->conf_portal_groups))
945 return;
946 set_timeout(conf->conf_isns_timeout, false);
947 s = isns_do_connect(isns);
948 if (s < 0)
949 return;
950 gethostname(hostname, sizeof(hostname));
951
952 res = isns_do_deregister(isns, s, hostname);
953 close(s);
954 set_timeout(0, false);
955}
956
957static bool
958valid_hex(const char ch)
959{
960 switch (ch) {
961 case '0':
962 case '1':
963 case '2':
964 case '3':
965 case '4':
966 case '5':
967 case '6':
968 case '7':
969 case '8':
970 case '9':
971 case 'a':
972 case 'A':
973 case 'b':
974 case 'B':
975 case 'c':
976 case 'C':
977 case 'd':
978 case 'D':
979 case 'e':
980 case 'E':
981 case 'f':
982 case 'F':
983 return (true);
984 default:
985 return (false);
986 }
987}
988
989bool
990valid_iscsi_name(const char *name)
991{
992 int i;
993
994 if (strlen(name) >= MAX_NAME_LEN) {
995 log_warnx("overlong name for target \"%s\"; max length allowed "
996 "by iSCSI specification is %d characters",
997 name, MAX_NAME_LEN);
998 return (false);
999 }
1000
1001 /*
1002 * In the cases below, we don't return an error, just in case the admin
1003 * was right, and we're wrong.
1004 */
1005 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) {
1006 for (i = strlen("iqn."); name[i] != '\0'; i++) {
1007 /*
1008 * XXX: We should verify UTF-8 normalisation, as defined
1009 * by 3.2.6.2: iSCSI Name Encoding.
1010 */
1011 if (isalnum(name[i]))
1012 continue;
1013 if (name[i] == '-' || name[i] == '.' || name[i] == ':')
1014 continue;
1015 log_warnx("invalid character \"%c\" in target name "
1016 "\"%s\"; allowed characters are letters, digits, "
1017 "'-', '.', and ':'", name[i], name);
1018 break;
1019 }
1020 /*
1021 * XXX: Check more stuff: valid date and a valid reversed domain.
1022 */
1023 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) {
1024 if (strlen(name) != strlen("eui.") + 16)
1025 log_warnx("invalid target name \"%s\"; the \"eui.\" "
1026 "should be followed by exactly 16 hexadecimal "
1027 "digits", name);
1028 for (i = strlen("eui."); name[i] != '\0'; i++) {
1029 if (!valid_hex(name[i])) {
1030 log_warnx("invalid character \"%c\" in target "
1031 "name \"%s\"; allowed characters are 1-9 "
1032 "and A-F", name[i], name);
1033 break;
1034 }
1035 }
1036 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) {
1037 if (strlen(name) > strlen("naa.") + 32)
1038 log_warnx("invalid target name \"%s\"; the \"naa.\" "
1039 "should be followed by at most 32 hexadecimal "
1040 "digits", name);
1041 for (i = strlen("naa."); name[i] != '\0'; i++) {
1042 if (!valid_hex(name[i])) {
1043 log_warnx("invalid character \"%c\" in target "
1044 "name \"%s\"; allowed characters are 1-9 "
1045 "and A-F", name[i], name);
1046 break;
1047 }
1048 }
1049 } else {
1050 log_warnx("invalid target name \"%s\"; should start with "
1051 "either \".iqn\", \"eui.\", or \"naa.\"",
1052 name);
1053 }
1054 return (true);
1055}
1056
1057struct target *
1058target_new(struct conf *conf, const char *name)
1059{
1060 struct target *targ;
1061 int i, len;
1062
1063 targ = target_find(conf, name);
1064 if (targ != NULL) {
1065 log_warnx("duplicated target \"%s\"", name);
1066 return (NULL);
1067 }
1068 if (valid_iscsi_name(name) == false) {
1069 log_warnx("target name \"%s\" is invalid", name);
1070 return (NULL);
1071 }
1072 targ = calloc(1, sizeof(*targ));
1073 if (targ == NULL)
1074 log_err(1, "calloc");
1075 targ->t_name = checked_strdup(name);
1076
1077 /*
1078 * RFC 3722 requires us to normalize the name to lowercase.
1079 */
1080 len = strlen(name);
1081 for (i = 0; i < len; i++)
1082 targ->t_name[i] = tolower(targ->t_name[i]);
1083
1084 TAILQ_INIT(&targ->t_luns);
1085 targ->t_conf = conf;
1086 TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next);
1087
1088 return (targ);
1089}
1090
1091void
1092target_delete(struct target *targ)
1093{
1094 struct lun *lun, *tmp;
1095
1096 TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next);
1097
1098 TAILQ_FOREACH_SAFE(lun, &targ->t_luns, l_next, tmp)
1099 lun_delete(lun);
1100 free(targ->t_name);
1101 free(targ);
1102}
1103
1104struct target *
1105target_find(struct conf *conf, const char *name)
1106{
1107 struct target *targ;
1108
1109 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1110 if (strcasecmp(targ->t_name, name) == 0)
1111 return (targ);
1112 }
1113
1114 return (NULL);
1115}
1116
1117struct lun *
1118lun_new(struct target *targ, int lun_id)
1119{
1120 struct lun *lun;
1121
1122 lun = lun_find(targ, lun_id);
1123 if (lun != NULL) {
1124 log_warnx("duplicated lun %d for target \"%s\"",
1125 lun_id, targ->t_name);
1126 return (NULL);
1127 }
1128
1129 lun = calloc(1, sizeof(*lun));
1130 if (lun == NULL)
1131 log_err(1, "calloc");
1132 lun->l_lun = lun_id;
1133 TAILQ_INIT(&lun->l_options);
1134 lun->l_target = targ;
1135 TAILQ_INSERT_TAIL(&targ->t_luns, lun, l_next);
1136
1137 return (lun);
1138}
1139
1140void
1141lun_delete(struct lun *lun)
1142{
1143 struct lun_option *lo, *tmp;
1144
1145 TAILQ_REMOVE(&lun->l_target->t_luns, lun, l_next);
1146
1147 TAILQ_FOREACH_SAFE(lo, &lun->l_options, lo_next, tmp)
1148 lun_option_delete(lo);
1149 free(lun->l_backend);
1150 free(lun->l_device_id);
1151 free(lun->l_path);
1152 free(lun->l_serial);
1153 free(lun);
1154}
1155
1156struct lun *
1157lun_find(const struct target *targ, int lun_id)
1158{
1159 struct lun *lun;
1160
1161 TAILQ_FOREACH(lun, &targ->t_luns, l_next) {
1162 if (lun->l_lun == lun_id)
1163 return (lun);
1164 }
1165
1166 return (NULL);
1167}
1168
1169void
1170lun_set_backend(struct lun *lun, const char *value)
1171{
1172 free(lun->l_backend);
1173 lun->l_backend = checked_strdup(value);
1174}
1175
1176void
1177lun_set_blocksize(struct lun *lun, size_t value)
1178{
1179
1180 lun->l_blocksize = value;
1181}
1182
1183void
1184lun_set_device_id(struct lun *lun, const char *value)
1185{
1186 free(lun->l_device_id);
1187 lun->l_device_id = checked_strdup(value);
1188}
1189
1190void
1191lun_set_path(struct lun *lun, const char *value)
1192{
1193 free(lun->l_path);
1194 lun->l_path = checked_strdup(value);
1195}
1196
1197void
1198lun_set_serial(struct lun *lun, const char *value)
1199{
1200 free(lun->l_serial);
1201 lun->l_serial = checked_strdup(value);
1202}
1203
1204void
1205lun_set_size(struct lun *lun, size_t value)
1206{
1207
1208 lun->l_size = value;
1209}
1210
1211void
1212lun_set_ctl_lun(struct lun *lun, uint32_t value)
1213{
1214
1215 lun->l_ctl_lun = value;
1216}
1217
1218struct lun_option *
1219lun_option_new(struct lun *lun, const char *name, const char *value)
1220{
1221 struct lun_option *lo;
1222
1223 lo = lun_option_find(lun, name);
1224 if (lo != NULL) {
1225 log_warnx("duplicated lun option %s for lun %d, target \"%s\"",
1226 name, lun->l_lun, lun->l_target->t_name);
1227 return (NULL);
1228 }
1229
1230 lo = calloc(1, sizeof(*lo));
1231 if (lo == NULL)
1232 log_err(1, "calloc");
1233 lo->lo_name = checked_strdup(name);
1234 lo->lo_value = checked_strdup(value);
1235 lo->lo_lun = lun;
1236 TAILQ_INSERT_TAIL(&lun->l_options, lo, lo_next);
1237
1238 return (lo);
1239}
1240
1241void
1242lun_option_delete(struct lun_option *lo)
1243{
1244
1245 TAILQ_REMOVE(&lo->lo_lun->l_options, lo, lo_next);
1246
1247 free(lo->lo_name);
1248 free(lo->lo_value);
1249 free(lo);
1250}
1251
1252struct lun_option *
1253lun_option_find(const struct lun *lun, const char *name)
1254{
1255 struct lun_option *lo;
1256
1257 TAILQ_FOREACH(lo, &lun->l_options, lo_next) {
1258 if (strcmp(lo->lo_name, name) == 0)
1259 return (lo);
1260 }
1261
1262 return (NULL);
1263}
1264
1265void
1266lun_option_set(struct lun_option *lo, const char *value)
1267{
1268
1269 free(lo->lo_value);
1270 lo->lo_value = checked_strdup(value);
1271}
1272
1273static struct connection *
1274connection_new(struct portal *portal, int fd, const char *host,
1275 const struct sockaddr *client_sa)
1276{
1277 struct connection *conn;
1278
1279 conn = calloc(1, sizeof(*conn));
1280 if (conn == NULL)
1281 log_err(1, "calloc");
1282 conn->conn_portal = portal;
1283 conn->conn_socket = fd;
1284 conn->conn_initiator_addr = checked_strdup(host);
1285 memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len);
1286
1287 /*
1288 * Default values, from RFC 3720, section 12.
1289 */
1290 conn->conn_max_data_segment_length = 8192;
1291 conn->conn_max_burst_length = 262144;
1292 conn->conn_immediate_data = true;
1293
1294 return (conn);
1295}
1296
1297#if 0
1298static void
1299conf_print(struct conf *conf)
1300{
1301 struct auth_group *ag;
1302 struct auth *auth;
1303 struct auth_name *auth_name;
1304 struct auth_portal *auth_portal;
1305 struct portal_group *pg;
1306 struct portal *portal;
1307 struct target *targ;
1308 struct lun *lun;
1309 struct lun_option *lo;
1310
1311 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1312 fprintf(stderr, "auth-group %s {\n", ag->ag_name);
1313 TAILQ_FOREACH(auth, &ag->ag_auths, a_next)
1314 fprintf(stderr, "\t chap-mutual %s %s %s %s\n",
1315 auth->a_user, auth->a_secret,
1316 auth->a_mutual_user, auth->a_mutual_secret);
1317 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next)
1318 fprintf(stderr, "\t initiator-name %s\n",
1319 auth_name->an_initator_name);
1320 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next)
1321 fprintf(stderr, "\t initiator-portal %s\n",
1322 auth_portal->an_initator_portal);
1323 fprintf(stderr, "}\n");
1324 }
1325 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1326 fprintf(stderr, "portal-group %s {\n", pg->pg_name);
1327 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
1328 fprintf(stderr, "\t listen %s\n", portal->p_listen);
1329 fprintf(stderr, "}\n");
1330 }
1331 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1332 fprintf(stderr, "target %s {\n", targ->t_name);
1333 if (targ->t_alias != NULL)
1334 fprintf(stderr, "\t alias %s\n", targ->t_alias);
1335 TAILQ_FOREACH(lun, &targ->t_luns, l_next) {
1336 fprintf(stderr, "\tlun %d {\n", lun->l_lun);
1337 fprintf(stderr, "\t\tpath %s\n", lun->l_path);
1338 TAILQ_FOREACH(lo, &lun->l_options, lo_next)
1339 fprintf(stderr, "\t\toption %s %s\n",
1340 lo->lo_name, lo->lo_value);
1341 fprintf(stderr, "\t}\n");
1342 }
1343 fprintf(stderr, "}\n");
1344 }
1345}
1346#endif
1347
1348static int
1349conf_verify_lun(struct lun *lun)
1350{
1351 const struct lun *lun2;
1352 const struct target *targ2;
1353
1354 if (lun->l_backend == NULL)
1355 lun_set_backend(lun, "block");
1356 if (strcmp(lun->l_backend, "block") == 0) {
1357 if (lun->l_path == NULL) {
1358 log_warnx("missing path for lun %d, target \"%s\"",
1359 lun->l_lun, lun->l_target->t_name);
1360 return (1);
1361 }
1362 } else if (strcmp(lun->l_backend, "ramdisk") == 0) {
1363 if (lun->l_size == 0) {
1364 log_warnx("missing size for ramdisk-backed lun %d, "
1365 "target \"%s\"", lun->l_lun, lun->l_target->t_name);
1366 return (1);
1367 }
1368 if (lun->l_path != NULL) {
1369 log_warnx("path must not be specified "
1370 "for ramdisk-backed lun %d, target \"%s\"",
1371 lun->l_lun, lun->l_target->t_name);
1372 return (1);
1373 }
1374 }
1375 if (lun->l_lun < 0 || lun->l_lun > 255) {
1376 log_warnx("invalid lun number for lun %d, target \"%s\"; "
1377 "must be between 0 and 255", lun->l_lun,
1378 lun->l_target->t_name);
1379 return (1);
1380 }
1381 if (lun->l_blocksize == 0) {
1382 lun_set_blocksize(lun, DEFAULT_BLOCKSIZE);
1383 } else if (lun->l_blocksize < 0) {
1384 log_warnx("invalid blocksize for lun %d, target \"%s\"; "
1385 "must be larger than 0", lun->l_lun, lun->l_target->t_name);
1386 return (1);
1387 }
1388 if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) {
1389 log_warnx("invalid size for lun %d, target \"%s\"; "
1390 "must be multiple of blocksize", lun->l_lun,
1391 lun->l_target->t_name);
1392 return (1);
1393 }
1394 TAILQ_FOREACH(targ2, &lun->l_target->t_conf->conf_targets, t_next) {
1395 TAILQ_FOREACH(lun2, &targ2->t_luns, l_next) {
1396 if (lun == lun2)
1397 continue;
1398 if (lun->l_path != NULL && lun2->l_path != NULL &&
1399 strcmp(lun->l_path, lun2->l_path) == 0) {
1400 log_debugx("WARNING: path \"%s\" duplicated "
1401 "between lun %d, target \"%s\", and "
1402 "lun %d, target \"%s\"", lun->l_path,
1403 lun->l_lun, lun->l_target->t_name,
1404 lun2->l_lun, lun2->l_target->t_name);
1405 }
1406 }
1407 }
1408
1409 return (0);
1410}
1411
1412int
1413conf_verify(struct conf *conf)
1414{
1415 struct auth_group *ag;
1416 struct portal_group *pg;
1417 struct target *targ;
1418 struct lun *lun;
1419 bool found;
1420 int error;
1421
1422 if (conf->conf_pidfile_path == NULL)
1423 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE);
1424
1425 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1426 if (targ->t_auth_group == NULL) {
1427 targ->t_auth_group = auth_group_find(conf,
1428 "default");
1429 assert(targ->t_auth_group != NULL);
1430 }
1431 if (targ->t_portal_group == NULL) {
1432 targ->t_portal_group = portal_group_find(conf,
1433 "default");
1434 assert(targ->t_portal_group != NULL);
1435 }
1436 found = false;
1437 TAILQ_FOREACH(lun, &targ->t_luns, l_next) {
1438 error = conf_verify_lun(lun);
1439 if (error != 0)
1440 return (error);
1441 found = true;
1442 }
1443 if (!found) {
1444 log_warnx("no LUNs defined for target \"%s\"",
1445 targ->t_name);
1446 }
1447 }
1448 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1449 assert(pg->pg_name != NULL);
1450 if (pg->pg_discovery_auth_group == NULL) {
1451 pg->pg_discovery_auth_group =
1452 auth_group_find(conf, "default");
1453 assert(pg->pg_discovery_auth_group != NULL);
1454 }
1455
1456 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1457 if (targ->t_portal_group == pg)
1458 break;
1459 }
1460 if (targ == NULL) {
1461 if (strcmp(pg->pg_name, "default") != 0)
1462 log_warnx("portal-group \"%s\" not assigned "
1463 "to any target", pg->pg_name);
1464 pg->pg_unassigned = true;
1465 } else
1466 pg->pg_unassigned = false;
1467 }
1468 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1469 if (ag->ag_name == NULL)
1470 assert(ag->ag_target != NULL);
1471 else
1472 assert(ag->ag_target == NULL);
1473
1474 found = false;
1475 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1476 if (targ->t_auth_group == ag) {
1477 found = true;
1478 break;
1479 }
1480 }
1481 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1482 if (pg->pg_discovery_auth_group == ag) {
1483 found = true;
1484 break;
1485 }
1486 }
1487 if (!found && ag->ag_name != NULL &&
1488 strcmp(ag->ag_name, "default") != 0 &&
1489 strcmp(ag->ag_name, "no-authentication") != 0 &&
1490 strcmp(ag->ag_name, "no-access") != 0) {
1491 log_warnx("auth-group \"%s\" not assigned "
1492 "to any target", ag->ag_name);
1493 }
1494 }
1495
1496 return (0);
1497}
1498
1499static int
1500conf_apply(struct conf *oldconf, struct conf *newconf)
1501{
1502 struct target *oldtarg, *newtarg, *tmptarg;
1503 struct lun *oldlun, *newlun, *tmplun;
1504 struct portal_group *oldpg, *newpg;
1505 struct portal *oldp, *newp;
1506 struct isns *oldns, *newns;
1507 pid_t otherpid;
1508 int changed, cumulated_error = 0, error;
1509 int one = 1;
1510
1511 if (oldconf->conf_debug != newconf->conf_debug) {
1512 log_debugx("changing debug level to %d", newconf->conf_debug);
1513 log_init(newconf->conf_debug);
1514 }
1515
1516 if (oldconf->conf_pidfh != NULL) {
1517 assert(oldconf->conf_pidfile_path != NULL);
1518 if (newconf->conf_pidfile_path != NULL &&
1519 strcmp(oldconf->conf_pidfile_path,
1520 newconf->conf_pidfile_path) == 0) {
1521 newconf->conf_pidfh = oldconf->conf_pidfh;
1522 oldconf->conf_pidfh = NULL;
1523 } else {
1524 log_debugx("removing pidfile %s",
1525 oldconf->conf_pidfile_path);
1526 pidfile_remove(oldconf->conf_pidfh);
1527 oldconf->conf_pidfh = NULL;
1528 }
1529 }
1530
1531 if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) {
1532 log_debugx("opening pidfile %s", newconf->conf_pidfile_path);
1533 newconf->conf_pidfh =
1534 pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid);
1535 if (newconf->conf_pidfh == NULL) {
1536 if (errno == EEXIST)
1537 log_errx(1, "daemon already running, pid: %jd.",
1538 (intmax_t)otherpid);
1539 log_err(1, "cannot open or create pidfile \"%s\"",
1540 newconf->conf_pidfile_path);
1541 }
1542 }
1543
1544 /* Deregister on removed iSNS servers. */
1545 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
1546 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
1547 if (strcmp(oldns->i_addr, newns->i_addr) == 0)
1548 break;
1549 }
1550 if (newns == NULL)
1551 isns_deregister(oldns);
1552 }
1553
1554 /*
1555 * XXX: If target or lun removal fails, we should somehow "move"
1556 * the old lun or target into newconf, so that subsequent
1557 * conf_apply() would try to remove them again. That would
1558 * be somewhat hairy, though, and lun deletion failures don't
1559 * really happen, so leave it as it is for now.
1560 */
1561 TAILQ_FOREACH_SAFE(oldtarg, &oldconf->conf_targets, t_next, tmptarg) {
1562 /*
1563 * First, remove any targets present in the old configuration
1564 * and missing in the new one.
1565 */
1566 newtarg = target_find(newconf, oldtarg->t_name);
1567 if (newtarg == NULL) {
1568 TAILQ_FOREACH_SAFE(oldlun, &oldtarg->t_luns, l_next,
1569 tmplun) {
1570 log_debugx("target %s not found in new "
1571 "configuration; removing its lun %d, "
1572 "backed by CTL lun %d",
1573 oldtarg->t_name, oldlun->l_lun,
1574 oldlun->l_ctl_lun);
1575 error = kernel_lun_remove(oldlun);
1576 if (error != 0) {
1577 log_warnx("failed to remove lun %d, "
1578 "target %s, CTL lun %d",
1579 oldlun->l_lun, oldtarg->t_name,
1580 oldlun->l_ctl_lun);
1581 cumulated_error++;
1582 }
1583 }
1584 kernel_port_remove(oldtarg);
1585 continue;
1586 }
1587
1588 /*
1589 * Second, remove any LUNs present in the old target
1590 * and missing in the new one.
1591 */
1592 TAILQ_FOREACH_SAFE(oldlun, &oldtarg->t_luns, l_next, tmplun) {
1593 newlun = lun_find(newtarg, oldlun->l_lun);
1594 if (newlun == NULL) {
1595 log_debugx("lun %d, target %s, CTL lun %d "
1596 "not found in new configuration; "
1597 "removing", oldlun->l_lun, oldtarg->t_name,
1598 oldlun->l_ctl_lun);
1599 error = kernel_lun_remove(oldlun);
1600 if (error != 0) {
1601 log_warnx("failed to remove lun %d, "
1602 "target %s, CTL lun %d",
1603 oldlun->l_lun, oldtarg->t_name,
1604 oldlun->l_ctl_lun);
1605 cumulated_error++;
1606 }
1607 continue;
1608 }
1609
1610 /*
1611 * Also remove the LUNs changed by more than size.
1612 */
1613 changed = 0;
1614 assert(oldlun->l_backend != NULL);
1615 assert(newlun->l_backend != NULL);
1616 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) {
1617 log_debugx("backend for lun %d, target %s, "
1618 "CTL lun %d changed; removing",
1619 oldlun->l_lun, oldtarg->t_name,
1620 oldlun->l_ctl_lun);
1621 changed = 1;
1622 }
1623 if (oldlun->l_blocksize != newlun->l_blocksize) {
1624 log_debugx("blocksize for lun %d, target %s, "
1625 "CTL lun %d changed; removing",
1626 oldlun->l_lun, oldtarg->t_name,
1627 oldlun->l_ctl_lun);
1628 changed = 1;
1629 }
1630 if (newlun->l_device_id != NULL &&
1631 (oldlun->l_device_id == NULL ||
1632 strcmp(oldlun->l_device_id, newlun->l_device_id) !=
1633 0)) {
1634 log_debugx("device-id for lun %d, target %s, "
1635 "CTL lun %d changed; removing",
1636 oldlun->l_lun, oldtarg->t_name,
1637 oldlun->l_ctl_lun);
1638 changed = 1;
1639 }
1640 if (newlun->l_path != NULL &&
1641 (oldlun->l_path == NULL ||
1642 strcmp(oldlun->l_path, newlun->l_path) != 0)) {
1643 log_debugx("path for lun %d, target %s, "
1644 "CTL lun %d, changed; removing",
1645 oldlun->l_lun, oldtarg->t_name,
1646 oldlun->l_ctl_lun);
1647 changed = 1;
1648 }
1649 if (newlun->l_serial != NULL &&
1650 (oldlun->l_serial == NULL ||
1651 strcmp(oldlun->l_serial, newlun->l_serial) != 0)) {
1652 log_debugx("serial for lun %d, target %s, "
1653 "CTL lun %d changed; removing",
1654 oldlun->l_lun, oldtarg->t_name,
1655 oldlun->l_ctl_lun);
1656 changed = 1;
1657 }
1658 if (changed) {
1659 error = kernel_lun_remove(oldlun);
1660 if (error != 0) {
1661 log_warnx("failed to remove lun %d, "
1662 "target %s, CTL lun %d",
1663 oldlun->l_lun, oldtarg->t_name,
1664 oldlun->l_ctl_lun);
1665 cumulated_error++;
1666 }
1667 lun_delete(oldlun);
1668 continue;
1669 }
1670
1671 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun);
1672 }
1673 }
1674
1675 /*
1676 * Now add new targets or modify existing ones.
1677 */
1678 TAILQ_FOREACH(newtarg, &newconf->conf_targets, t_next) {
1679 oldtarg = target_find(oldconf, newtarg->t_name);
1680
1681 TAILQ_FOREACH_SAFE(newlun, &newtarg->t_luns, l_next, tmplun) {
1682 if (oldtarg != NULL) {
1683 oldlun = lun_find(oldtarg, newlun->l_lun);
1684 if (oldlun != NULL) {
1685 if (newlun->l_size != oldlun->l_size ||
1686 newlun->l_size == 0) {
1687 log_debugx("resizing lun %d, "
1688 "target %s, CTL lun %d",
1689 newlun->l_lun,
1690 newtarg->t_name,
1691 newlun->l_ctl_lun);
1692 error =
1693 kernel_lun_resize(newlun);
1694 if (error != 0) {
1695 log_warnx("failed to "
1696 "resize lun %d, "
1697 "target %s, "
1698 "CTL lun %d",
1699 newlun->l_lun,
1700 newtarg->t_name,
1701 newlun->l_lun);
1702 cumulated_error++;
1703 }
1704 }
1705 continue;
1706 }
1707 }
1708 log_debugx("adding lun %d, target %s",
1709 newlun->l_lun, newtarg->t_name);
1710 error = kernel_lun_add(newlun);
1711 if (error != 0) {
1712 log_warnx("failed to add lun %d, target %s",
1713 newlun->l_lun, newtarg->t_name);
1714 lun_delete(newlun);
1715 cumulated_error++;
1716 }
1717 }
1718 if (oldtarg == NULL)
1719 kernel_port_add(newtarg);
1720 }
1721
1722 /*
1723 * Go through the new portals, opening the sockets as neccessary.
1724 */
1725 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
1726 if (newpg->pg_unassigned) {
1727 log_debugx("not listening on portal-group \"%s\", "
1728 "not assigned to any target",
1729 newpg->pg_name);
1730 continue;
1731 }
1732 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) {
1733 /*
1734 * Try to find already open portal and reuse
1735 * the listening socket. We don't care about
1736 * what portal or portal group that was, what
1737 * matters is the listening address.
1738 */
1739 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups,
1740 pg_next) {
1741 TAILQ_FOREACH(oldp, &oldpg->pg_portals,
1742 p_next) {
1743 if (strcmp(newp->p_listen,
1744 oldp->p_listen) == 0 &&
1745 oldp->p_socket > 0) {
1746 newp->p_socket =
1747 oldp->p_socket;
1748 oldp->p_socket = 0;
1749 break;
1750 }
1751 }
1752 }
1753 if (newp->p_socket > 0) {
1754 /*
1755 * We're done with this portal.
1756 */
1757 continue;
1758 }
1759
1760#ifdef ICL_KERNEL_PROXY
1761 if (proxy_mode) {
1762 newpg->pg_conf->conf_portal_id++;
1763 newp->p_id = newpg->pg_conf->conf_portal_id;
1764 log_debugx("listening on %s, portal-group "
1765 "\"%s\", portal id %d, using ICL proxy",
1766 newp->p_listen, newpg->pg_name, newp->p_id);
1767 kernel_listen(newp->p_ai, newp->p_iser,
1768 newp->p_id);
1769 continue;
1770 }
1771#endif
1772 assert(proxy_mode == false);
1773 assert(newp->p_iser == false);
1774
1775 log_debugx("listening on %s, portal-group \"%s\"",
1776 newp->p_listen, newpg->pg_name);
1777 newp->p_socket = socket(newp->p_ai->ai_family,
1778 newp->p_ai->ai_socktype,
1779 newp->p_ai->ai_protocol);
1780 if (newp->p_socket < 0) {
1781 log_warn("socket(2) failed for %s",
1782 newp->p_listen);
1783 cumulated_error++;
1784 continue;
1785 }
1786 error = setsockopt(newp->p_socket, SOL_SOCKET,
1787 SO_REUSEADDR, &one, sizeof(one));
1788 if (error != 0) {
1789 log_warn("setsockopt(SO_REUSEADDR) failed "
1790 "for %s", newp->p_listen);
1791 close(newp->p_socket);
1792 newp->p_socket = 0;
1793 cumulated_error++;
1794 continue;
1795 }
1796 error = bind(newp->p_socket, newp->p_ai->ai_addr,
1797 newp->p_ai->ai_addrlen);
1798 if (error != 0) {
1799 log_warn("bind(2) failed for %s",
1800 newp->p_listen);
1801 close(newp->p_socket);
1802 newp->p_socket = 0;
1803 cumulated_error++;
1804 continue;
1805 }
1806 error = listen(newp->p_socket, -1);
1807 if (error != 0) {
1808 log_warn("listen(2) failed for %s",
1809 newp->p_listen);
1810 close(newp->p_socket);
1811 newp->p_socket = 0;
1812 cumulated_error++;
1813 continue;
1814 }
1815 }
1816 }
1817
1818 /*
1819 * Go through the no longer used sockets, closing them.
1820 */
1821 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) {
1822 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) {
1823 if (oldp->p_socket <= 0)
1824 continue;
1825 log_debugx("closing socket for %s, portal-group \"%s\"",
1826 oldp->p_listen, oldpg->pg_name);
1827 close(oldp->p_socket);
1828 oldp->p_socket = 0;
1829 }
1830 }
1831
1832 /* (Re-)Register on remaining/new iSNS servers. */
1833 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
1834 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
1835 if (strcmp(oldns->i_addr, newns->i_addr) == 0)
1836 break;
1837 }
1838 isns_register(newns, oldns);
1839 }
1840
1841 /* Schedule iSNS update */
1842 if (!TAILQ_EMPTY(&newconf->conf_isns))
1843 set_timeout((newconf->conf_isns_period + 2) / 3, false);
1844
1845 return (cumulated_error);
1846}
1847
1848bool
1849timed_out(void)
1850{
1851
1852 return (sigalrm_received);
1853}
1854
1855static void
1856sigalrm_handler_fatal(int dummy __unused)
1857{
1858 /*
1859 * It would be easiest to just log an error and exit. We can't
1860 * do this, though, because log_errx() is not signal safe, since
1861 * it calls syslog(3). Instead, set a flag checked by pdu_send()
1862 * and pdu_receive(), to call log_errx() there. Should they fail
1863 * to notice, we'll exit here one second later.
1864 */
1865 if (sigalrm_received) {
1866 /*
1867 * Oh well. Just give up and quit.
1868 */
1869 _exit(2);
1870 }
1871
1872 sigalrm_received = true;
1873}
1874
1875static void
1876sigalrm_handler(int dummy __unused)
1877{
1878
1879 sigalrm_received = true;
1880}
1881
1882void
1883set_timeout(int timeout, int fatal)
1884{
1885 struct sigaction sa;
1886 struct itimerval itv;
1887 int error;
1888
1889 if (timeout <= 0) {
1890 log_debugx("session timeout disabled");
1891 bzero(&itv, sizeof(itv));
1892 error = setitimer(ITIMER_REAL, &itv, NULL);
1893 if (error != 0)
1894 log_err(1, "setitimer");
1895 sigalrm_received = false;
1896 return;
1897 }
1898
1899 sigalrm_received = false;
1900 bzero(&sa, sizeof(sa));
1901 if (fatal)
1902 sa.sa_handler = sigalrm_handler_fatal;
1903 else
1904 sa.sa_handler = sigalrm_handler;
1905 sigfillset(&sa.sa_mask);
1906 error = sigaction(SIGALRM, &sa, NULL);
1907 if (error != 0)
1908 log_err(1, "sigaction");
1909
1910 /*
1911 * First SIGALRM will arive after conf_timeout seconds.
1912 * If we do nothing, another one will arrive a second later.
1913 */
1914 log_debugx("setting session timeout to %d seconds", timeout);
1915 bzero(&itv, sizeof(itv));
1916 itv.it_interval.tv_sec = 1;
1917 itv.it_value.tv_sec = timeout;
1918 error = setitimer(ITIMER_REAL, &itv, NULL);
1919 if (error != 0)
1920 log_err(1, "setitimer");
1921}
1922
1923static int
1924wait_for_children(bool block)
1925{
1926 pid_t pid;
1927 int status;
1928 int num = 0;
1929
1930 for (;;) {
1931 /*
1932 * If "block" is true, wait for at least one process.
1933 */
1934 if (block && num == 0)
1935 pid = wait4(-1, &status, 0, NULL);
1936 else
1937 pid = wait4(-1, &status, WNOHANG, NULL);
1938 if (pid <= 0)
1939 break;
1940 if (WIFSIGNALED(status)) {
1941 log_warnx("child process %d terminated with signal %d",
1942 pid, WTERMSIG(status));
1943 } else if (WEXITSTATUS(status) != 0) {
1944 log_warnx("child process %d terminated with exit status %d",
1945 pid, WEXITSTATUS(status));
1946 } else {
1947 log_debugx("child process %d terminated gracefully", pid);
1948 }
1949 num++;
1950 }
1951
1952 return (num);
1953}
1954
1955static void
1956handle_connection(struct portal *portal, int fd,
1957 const struct sockaddr *client_sa, bool dont_fork)
1958{
1959 struct connection *conn;
1960 int error;
1961 pid_t pid;
1962 char host[NI_MAXHOST + 1];
1963 struct conf *conf;
1964
1965 conf = portal->p_portal_group->pg_conf;
1966
1967 if (dont_fork) {
1968 log_debugx("incoming connection; not forking due to -d flag");
1969 } else {
1970 nchildren -= wait_for_children(false);
1971 assert(nchildren >= 0);
1972
1973 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) {
1974 log_debugx("maxproc limit of %d child processes hit; "
1975 "waiting for child process to exit", conf->conf_maxproc);
1976 nchildren -= wait_for_children(true);
1977 assert(nchildren >= 0);
1978 }
1979 log_debugx("incoming connection; forking child process #%d",
1980 nchildren);
1981 nchildren++;
1982 pid = fork();
1983 if (pid < 0)
1984 log_err(1, "fork");
1985 if (pid > 0) {
1986 close(fd);
1987 return;
1988 }
1989 }
1990 pidfile_close(conf->conf_pidfh);
1991
1992 error = getnameinfo(client_sa, client_sa->sa_len,
1993 host, sizeof(host), NULL, 0, NI_NUMERICHOST);
1994 if (error != 0)
1995 log_errx(1, "getnameinfo: %s", gai_strerror(error));
1996
1997 log_debugx("accepted connection from %s; portal group \"%s\"",
1998 host, portal->p_portal_group->pg_name);
1999 log_set_peer_addr(host);
2000 setproctitle("%s", host);
2001
2002 conn = connection_new(portal, fd, host, client_sa);
2003 set_timeout(conf->conf_timeout, true);
2004 kernel_capsicate();
2005 login(conn);
2006 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
2007 kernel_handoff(conn);
2008 log_debugx("connection handed off to the kernel");
2009 } else {
2010 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
2011 discovery(conn);
2012 }
2013 log_debugx("nothing more to do; exiting");
2014 exit(0);
2015}
2016
2017static int
2018fd_add(int fd, fd_set *fdset, int nfds)
2019{
2020
2021 /*
2022 * Skip sockets which we failed to bind.
2023 */
2024 if (fd <= 0)
2025 return (nfds);
2026
2027 FD_SET(fd, fdset);
2028 if (fd > nfds)
2029 nfds = fd;
2030 return (nfds);
2031}
2032
2033static void
2034main_loop(struct conf *conf, bool dont_fork)
2035{
2036 struct portal_group *pg;
2037 struct portal *portal;
2038 struct sockaddr_storage client_sa;
2039 socklen_t client_salen;
2040#ifdef ICL_KERNEL_PROXY
2041 int connection_id;
2042 int portal_id;
2043#endif
2044 fd_set fdset;
2045 int error, nfds, client_fd;
2046
2047 pidfile_write(conf->conf_pidfh);
2048
2049 for (;;) {
2050 if (sighup_received || sigterm_received || timed_out())
2051 return;
2052
2053#ifdef ICL_KERNEL_PROXY
2054 if (proxy_mode) {
2055 client_salen = sizeof(client_sa);
2056 kernel_accept(&connection_id, &portal_id,
2057 (struct sockaddr *)&client_sa, &client_salen);
2058 assert(client_salen >= client_sa.ss_len);
2059
2060 log_debugx("incoming connection, id %d, portal id %d",
2061 connection_id, portal_id);
2062 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2063 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2064 if (portal->p_id == portal_id) {
2065 goto found;
2066 }
2067 }
2068 }
2069
2070 log_errx(1, "kernel returned invalid portal_id %d",
2071 portal_id);
2072
2073found:
2074 handle_connection(portal, connection_id,
2075 (struct sockaddr *)&client_sa, dont_fork);
2076 } else {
2077#endif
2078 assert(proxy_mode == false);
2079
2080 FD_ZERO(&fdset);
2081 nfds = 0;
2082 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2083 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
2084 nfds = fd_add(portal->p_socket, &fdset, nfds);
2085 }
2086 error = select(nfds + 1, &fdset, NULL, NULL, NULL);
2087 if (error <= 0) {
2088 if (errno == EINTR)
2089 return;
2090 log_err(1, "select");
2091 }
2092 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2093 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2094 if (!FD_ISSET(portal->p_socket, &fdset))
2095 continue;
2096 client_salen = sizeof(client_sa);
2097 client_fd = accept(portal->p_socket,
2098 (struct sockaddr *)&client_sa,
2099 &client_salen);
2100 if (client_fd < 0)
2101 log_err(1, "accept");
2102 assert(client_salen >= client_sa.ss_len);
2103
2104 handle_connection(portal, client_fd,
2105 (struct sockaddr *)&client_sa,
2106 dont_fork);
2107 break;
2108 }
2109 }
2110#ifdef ICL_KERNEL_PROXY
2111 }
2112#endif
2113 }
2114}
2115
2116static void
2117sighup_handler(int dummy __unused)
2118{
2119
2120 sighup_received = true;
2121}
2122
2123static void
2124sigterm_handler(int dummy __unused)
2125{
2126
2127 sigterm_received = true;
2128}
2129
2130static void
2131sigchld_handler(int dummy __unused)
2132{
2133
2134 /*
2135 * The only purpose of this handler is to make SIGCHLD
2136 * interrupt the ISCSIDWAIT ioctl(2), so we can call
2137 * wait_for_children().
2138 */
2139}
2140
2141static void
2142register_signals(void)
2143{
2144 struct sigaction sa;
2145 int error;
2146
2147 bzero(&sa, sizeof(sa));
2148 sa.sa_handler = sighup_handler;
2149 sigfillset(&sa.sa_mask);
2150 error = sigaction(SIGHUP, &sa, NULL);
2151 if (error != 0)
2152 log_err(1, "sigaction");
2153
2154 sa.sa_handler = sigterm_handler;
2155 error = sigaction(SIGTERM, &sa, NULL);
2156 if (error != 0)
2157 log_err(1, "sigaction");
2158
2159 sa.sa_handler = sigterm_handler;
2160 error = sigaction(SIGINT, &sa, NULL);
2161 if (error != 0)
2162 log_err(1, "sigaction");
2163
2164 sa.sa_handler = sigchld_handler;
2165 error = sigaction(SIGCHLD, &sa, NULL);
2166 if (error != 0)
2167 log_err(1, "sigaction");
2168}
2169
2170int
2171main(int argc, char **argv)
2172{
2173 struct conf *oldconf, *newconf, *tmpconf;
2174 struct isns *newns;
2175 const char *config_path = DEFAULT_CONFIG_PATH;
2176 int debug = 0, ch, error;
2177 bool dont_daemonize = false;
2178
2179 while ((ch = getopt(argc, argv, "df:R")) != -1) {
2180 switch (ch) {
2181 case 'd':
2182 dont_daemonize = true;
2183 debug++;
2184 break;
2185 case 'f':
2186 config_path = optarg;
2187 break;
2188 case 'R':
2189#ifndef ICL_KERNEL_PROXY
2190 log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY "
2191 "does not support iSER protocol");
2192#endif
2193 proxy_mode = true;
2194 break;
2195 case '?':
2196 default:
2197 usage();
2198 }
2199 }
2200 argc -= optind;
2201 if (argc != 0)
2202 usage();
2203
2204 log_init(debug);
2205 kernel_init();
2206
2207 oldconf = conf_new_from_kernel();
2208 newconf = conf_new_from_file(config_path);
2209 if (newconf == NULL)
2210 log_errx(1, "configuration error; exiting");
2211 if (debug > 0) {
2212 oldconf->conf_debug = debug;
2213 newconf->conf_debug = debug;
2214 }
2215
2216 error = conf_apply(oldconf, newconf);
2217 if (error != 0)
2218 log_errx(1, "failed to apply configuration; exiting");
2219
2220 conf_delete(oldconf);
2221 oldconf = NULL;
2222
2223 register_signals();
2224
2225 if (dont_daemonize == false) {
2226 log_debugx("daemonizing");
2227 if (daemon(0, 0) == -1) {
2228 log_warn("cannot daemonize");
2229 pidfile_remove(newconf->conf_pidfh);
2230 exit(1);
2231 }
2232 }
2233
2234 /* Schedule iSNS update */
2235 if (!TAILQ_EMPTY(&newconf->conf_isns))
2236 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2237
2238 for (;;) {
2239 main_loop(newconf, dont_daemonize);
2240 if (sighup_received) {
2241 sighup_received = false;
2242 log_debugx("received SIGHUP, reloading configuration");
2243 tmpconf = conf_new_from_file(config_path);
2244 if (tmpconf == NULL) {
2245 log_warnx("configuration error, "
2246 "continuing with old configuration");
2247 } else {
2248 if (debug > 0)
2249 tmpconf->conf_debug = debug;
2250 oldconf = newconf;
2251 newconf = tmpconf;
2252 error = conf_apply(oldconf, newconf);
2253 if (error != 0)
2254 log_warnx("failed to reload "
2255 "configuration");
2256 conf_delete(oldconf);
2257 oldconf = NULL;
2258 }
2259 } else if (sigterm_received) {
2260 log_debugx("exiting on signal; "
2261 "reloading empty configuration");
2262
2263 log_debugx("disabling CTL iSCSI port "
2264 "and terminating all connections");
2265
2266 oldconf = newconf;
2267 newconf = conf_new();
2268 if (debug > 0)
2269 newconf->conf_debug = debug;
2270 error = conf_apply(oldconf, newconf);
2271 if (error != 0)
2272 log_warnx("failed to apply configuration");
2273 conf_delete(oldconf);
2274 oldconf = NULL;
2275
2276 log_warnx("exiting on signal");
2277 exit(0);
2278 } else {
2279 nchildren -= wait_for_children(false);
2280 assert(nchildren >= 0);
2281 if (timed_out()) {
2282 set_timeout(0, false);
2283 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next)
2284 isns_check(newns);
2285 /* Schedule iSNS update */
2286 if (!TAILQ_EMPTY(&newconf->conf_isns)) {
2287 set_timeout((newconf->conf_isns_period
2288 + 2) / 3,
2289 false);
2290 }
2291 }
2292 }
2293 }
2294 /* NOTREACHED */
2295}