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 * $FreeBSD: stable/10/usr.sbin/ctld/ctld.c 265509 2014-05-07 07:32:45Z trasz $
30 */
31
32#include <sys/types.h>
33#include <sys/time.h>
34#include <sys/socket.h>
35#include <sys/wait.h>
36#include <netinet/in.h>
37#include <assert.h>
38#include <ctype.h>
39#include <errno.h>
40#include <netdb.h>
41#include <signal.h>
42#include <stdbool.h>
43#include <stdio.h>
44#include <stdint.h>
45#include <stdlib.h>
46#include <string.h>
47#include <unistd.h>
48
49#include "ctld.h"
50
51bool proxy_mode = false;
52
53static volatile bool sighup_received = false;
54static volatile bool sigterm_received = false;
55static volatile bool sigalrm_received = false;
56
57static int nchildren = 0;
58
59static void
60usage(void)
61{
62
63 fprintf(stderr, "usage: ctld [-d][-f config-file]\n");
64 exit(1);
65}
66
67char *
68checked_strdup(const char *s)
69{
70 char *c;
71
72 c = strdup(s);
73 if (c == NULL)
74 log_err(1, "strdup");
75 return (c);
76}
77
78struct conf *
79conf_new(void)
80{
81 struct conf *conf;
82
83 conf = calloc(1, sizeof(*conf));
84 if (conf == NULL)
85 log_err(1, "calloc");
86 TAILQ_INIT(&conf->conf_targets);
87 TAILQ_INIT(&conf->conf_auth_groups);
88 TAILQ_INIT(&conf->conf_portal_groups);
89
90 conf->conf_debug = 0;
91 conf->conf_timeout = 60;
92 conf->conf_maxproc = 30;
93
94 return (conf);
95}
96
97void
98conf_delete(struct conf *conf)
99{
100 struct target *targ, *tmp;
101 struct auth_group *ag, *cagtmp;
102 struct portal_group *pg, *cpgtmp;
103
104 assert(conf->conf_pidfh == NULL);
105
106 TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp)
107 target_delete(targ);
108 TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp)
109 auth_group_delete(ag);
110 TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp)
111 portal_group_delete(pg);
112 free(conf->conf_pidfile_path);
113 free(conf);
114}
115
116static struct auth *
117auth_new(struct auth_group *ag)
118{
119 struct auth *auth;
120
121 auth = calloc(1, sizeof(*auth));
122 if (auth == NULL)
123 log_err(1, "calloc");
124 auth->a_auth_group = ag;
125 TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next);
126 return (auth);
127}
128
129static void
130auth_delete(struct auth *auth)
131{
132 TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next);
133
134 free(auth->a_user);
135 free(auth->a_secret);
136 free(auth->a_mutual_user);
137 free(auth->a_mutual_secret);
138 free(auth);
139}
140
141const struct auth *
142auth_find(struct auth_group *ag, const char *user)
143{
144 const struct auth *auth;
145
146 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) {
147 if (strcmp(auth->a_user, user) == 0)
148 return (auth);
149 }
150
151 return (NULL);
152}
153
154static void
155auth_check_secret_length(struct auth *auth)
156{
157 size_t len;
158
159 len = strlen(auth->a_secret);
160 if (len > 16) {
161 if (auth->a_auth_group->ag_name != NULL)
162 log_warnx("secret for user \"%s\", auth-group \"%s\", "
163 "is too long; it should be at most 16 characters "
164 "long", auth->a_user, auth->a_auth_group->ag_name);
165 else
166 log_warnx("secret for user \"%s\", target \"%s\", "
167 "is too long; it should be at most 16 characters "
168 "long", auth->a_user,
169 auth->a_auth_group->ag_target->t_name);
170 }
171 if (len < 12) {
172 if (auth->a_auth_group->ag_name != NULL)
173 log_warnx("secret for user \"%s\", auth-group \"%s\", "
174 "is too short; it should be at least 12 characters "
175 "long", auth->a_user,
176 auth->a_auth_group->ag_name);
177 else
178 log_warnx("secret for user \"%s\", target \"%s\", "
179 "is too short; it should be at least 16 characters "
180 "long", auth->a_user,
181 auth->a_auth_group->ag_target->t_name);
182 }
183
184 if (auth->a_mutual_secret != NULL) {
185 len = strlen(auth->a_secret);
186 if (len > 16) {
187 if (auth->a_auth_group->ag_name != NULL)
188 log_warnx("mutual secret for user \"%s\", "
189 "auth-group \"%s\", is too long; it should "
190 "be at most 16 characters long",
191 auth->a_user, auth->a_auth_group->ag_name);
192 else
193 log_warnx("mutual secret for user \"%s\", "
194 "target \"%s\", is too long; it should "
195 "be at most 16 characters long",
196 auth->a_user,
197 auth->a_auth_group->ag_target->t_name);
198 }
199 if (len < 12) {
200 if (auth->a_auth_group->ag_name != NULL)
201 log_warnx("mutual secret for user \"%s\", "
202 "auth-group \"%s\", is too short; it "
203 "should be at least 12 characters long",
204 auth->a_user, auth->a_auth_group->ag_name);
205 else
206 log_warnx("mutual secret for user \"%s\", "
207 "target \"%s\", is too short; it should be "
208 "at least 16 characters long",
209 auth->a_user,
210 auth->a_auth_group->ag_target->t_name);
211 }
212 }
213}
214
215const struct auth *
216auth_new_chap(struct auth_group *ag, const char *user,
217 const char *secret)
218{
219 struct auth *auth;
220
221 if (ag->ag_type == AG_TYPE_UNKNOWN)
222 ag->ag_type = AG_TYPE_CHAP;
223 if (ag->ag_type != AG_TYPE_CHAP) {
224 if (ag->ag_name != NULL)
225 log_warnx("cannot mix \"chap\" authentication with "
226 "other types for auth-group \"%s\"", ag->ag_name);
227 else
228 log_warnx("cannot mix \"chap\" authentication with "
229 "other types for target \"%s\"",
230 ag->ag_target->t_name);
231 return (NULL);
232 }
233
234 auth = auth_new(ag);
235 auth->a_user = checked_strdup(user);
236 auth->a_secret = checked_strdup(secret);
237
238 auth_check_secret_length(auth);
239
240 return (auth);
241}
242
243const struct auth *
244auth_new_chap_mutual(struct auth_group *ag, const char *user,
245 const char *secret, const char *user2, const char *secret2)
246{
247 struct auth *auth;
248
249 if (ag->ag_type == AG_TYPE_UNKNOWN)
250 ag->ag_type = AG_TYPE_CHAP_MUTUAL;
251 if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) {
252 if (ag->ag_name != NULL)
253 log_warnx("cannot mix \"chap-mutual\" authentication "
254 "with other types for auth-group \"%s\"",
255 ag->ag_name);
256 else
257 log_warnx("cannot mix \"chap-mutual\" authentication "
258 "with other types for target \"%s\"",
259 ag->ag_target->t_name);
260 return (NULL);
261 }
262
263 auth = auth_new(ag);
264 auth->a_user = checked_strdup(user);
265 auth->a_secret = checked_strdup(secret);
266 auth->a_mutual_user = checked_strdup(user2);
267 auth->a_mutual_secret = checked_strdup(secret2);
268
269 auth_check_secret_length(auth);
270
271 return (auth);
272}
273
274const struct auth_name *
275auth_name_new(struct auth_group *ag, const char *name)
276{
277 struct auth_name *an;
278
279 an = calloc(1, sizeof(*an));
280 if (an == NULL)
281 log_err(1, "calloc");
282 an->an_auth_group = ag;
283 an->an_initator_name = checked_strdup(name);
284 TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next);
285 return (an);
286}
287
288static void
289auth_name_delete(struct auth_name *an)
290{
291 TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next);
292
293 free(an->an_initator_name);
294 free(an);
295}
296
297bool
298auth_name_defined(const struct auth_group *ag)
299{
300 if (TAILQ_EMPTY(&ag->ag_names))
301 return (false);
302 return (true);
303}
304
305const struct auth_name *
306auth_name_find(const struct auth_group *ag, const char *name)
307{
308 const struct auth_name *auth_name;
309
310 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) {
311 if (strcmp(auth_name->an_initator_name, name) == 0)
312 return (auth_name);
313 }
314
315 return (NULL);
316}
317
318const struct auth_portal *
319auth_portal_new(struct auth_group *ag, const char *portal)
320{
321 struct auth_portal *ap;
322
323 ap = calloc(1, sizeof(*ap));
324 if (ap == NULL)
325 log_err(1, "calloc");
326 ap->ap_auth_group = ag;
327 ap->ap_initator_portal = checked_strdup(portal);
328 TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next);
329 return (ap);
330}
331
332static void
333auth_portal_delete(struct auth_portal *ap)
334{
335 TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next);
336
337 free(ap->ap_initator_portal);
338 free(ap);
339}
340
341bool
342auth_portal_defined(const struct auth_group *ag)
343{
344 if (TAILQ_EMPTY(&ag->ag_portals))
345 return (false);
346 return (true);
347}
348
349const struct auth_portal *
350auth_portal_find(const struct auth_group *ag, const char *portal)
351{
352 const struct auth_portal *auth_portal;
353
354 TAILQ_FOREACH(auth_portal, &ag->ag_portals, ap_next) {
355 if (strcmp(auth_portal->ap_initator_portal, portal) == 0)
356 return (auth_portal);
357 }
358
359 return (NULL);
360}
361
362struct auth_group *
363auth_group_new(struct conf *conf, const char *name)
364{
365 struct auth_group *ag;
366
367 if (name != NULL) {
368 ag = auth_group_find(conf, name);
369 if (ag != NULL) {
370 log_warnx("duplicated auth-group \"%s\"", name);
371 return (NULL);
372 }
373 }
374
375 ag = calloc(1, sizeof(*ag));
376 if (ag == NULL)
377 log_err(1, "calloc");
378 if (name != NULL)
379 ag->ag_name = checked_strdup(name);
380 TAILQ_INIT(&ag->ag_auths);
381 TAILQ_INIT(&ag->ag_names);
382 TAILQ_INIT(&ag->ag_portals);
383 ag->ag_conf = conf;
384 TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next);
385
386 return (ag);
387}
388
389void
390auth_group_delete(struct auth_group *ag)
391{
392 struct auth *auth, *auth_tmp;
393 struct auth_name *auth_name, *auth_name_tmp;
394 struct auth_portal *auth_portal, *auth_portal_tmp;
395
396 TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next);
397
398 TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp)
399 auth_delete(auth);
400 TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp)
401 auth_name_delete(auth_name);
402 TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next,
403 auth_portal_tmp)
404 auth_portal_delete(auth_portal);
405 free(ag->ag_name);
406 free(ag);
407}
408
409struct auth_group *
410auth_group_find(struct conf *conf, const char *name)
411{
412 struct auth_group *ag;
413
414 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
415 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0)
416 return (ag);
417 }
418
419 return (NULL);
420}
421
422static int
423auth_group_set_type(struct auth_group *ag, int type)
424{
425
426 if (ag->ag_type == AG_TYPE_UNKNOWN) {
427 ag->ag_type = type;
428 return (0);
429 }
430
431 if (ag->ag_type == type)
432 return (0);
433
434 return (1);
435}
436
437int
438auth_group_set_type_str(struct auth_group *ag, const char *str)
439{
440 int error, type;
441
442 if (strcmp(str, "none") == 0) {
443 type = AG_TYPE_NO_AUTHENTICATION;
444 } else if (strcmp(str, "deny") == 0) {
445 type = AG_TYPE_DENY;
446 } else if (strcmp(str, "chap") == 0) {
447 type = AG_TYPE_CHAP;
448 } else if (strcmp(str, "chap-mutual") == 0) {
449 type = AG_TYPE_CHAP_MUTUAL;
450 } else {
451 if (ag->ag_name != NULL)
452 log_warnx("invalid auth-type \"%s\" for auth-group "
453 "\"%s\"", str, ag->ag_name);
454 else
455 log_warnx("invalid auth-type \"%s\" for target "
456 "\"%s\"", str, ag->ag_target->t_name);
457 return (1);
458 }
459
460 error = auth_group_set_type(ag, type);
461 if (error != 0) {
462 if (ag->ag_name != NULL)
463 log_warnx("cannot set auth-type to \"%s\" for "
464 "auth-group \"%s\"; already has a different "
465 "type", str, ag->ag_name);
466 else
467 log_warnx("cannot set auth-type to \"%s\" for target "
468 "\"%s\"; already has a different type",
469 str, ag->ag_target->t_name);
470 return (1);
471 }
472
473 return (error);
474}
475
476static struct portal *
477portal_new(struct portal_group *pg)
478{
479 struct portal *portal;
480
481 portal = calloc(1, sizeof(*portal));
482 if (portal == NULL)
483 log_err(1, "calloc");
484 TAILQ_INIT(&portal->p_targets);
485 portal->p_portal_group = pg;
486 TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next);
487 return (portal);
488}
489
490static void
491portal_delete(struct portal *portal)
492{
493 TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next);
494 freeaddrinfo(portal->p_ai);
495 free(portal->p_listen);
496 free(portal);
497}
498
499struct portal_group *
500portal_group_new(struct conf *conf, const char *name)
501{
502 struct portal_group *pg;
503
504 pg = portal_group_find(conf, name);
505 if (pg != NULL) {
506 log_warnx("duplicated portal-group \"%s\"", name);
507 return (NULL);
508 }
509
510 pg = calloc(1, sizeof(*pg));
511 if (pg == NULL)
512 log_err(1, "calloc");
513 pg->pg_name = checked_strdup(name);
514 TAILQ_INIT(&pg->pg_portals);
515 pg->pg_conf = conf;
516 conf->conf_last_portal_group_tag++;
517 pg->pg_tag = conf->conf_last_portal_group_tag;
518 TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next);
519
520 return (pg);
521}
522
523void
524portal_group_delete(struct portal_group *pg)
525{
526 struct portal *portal, *tmp;
527
528 TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next);
529
530 TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp)
531 portal_delete(portal);
532 free(pg->pg_name);
533 free(pg);
534}
535
536struct portal_group *
537portal_group_find(struct conf *conf, const char *name)
538{
539 struct portal_group *pg;
540
541 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
542 if (strcmp(pg->pg_name, name) == 0)
543 return (pg);
544 }
545
546 return (NULL);
547}
548
549int
550portal_group_add_listen(struct portal_group *pg, const char *value, bool iser)
551{
552 struct addrinfo hints;
553 struct portal *portal;
554 char *addr, *ch, *arg;
555 const char *port;
556 int error, colons = 0;
557
558 portal = portal_new(pg);
559 portal->p_listen = checked_strdup(value);
560 portal->p_iser = iser;
561
562 arg = portal->p_listen;
563 if (arg[0] == '\0') {
564 log_warnx("empty listen address");
565 free(portal->p_listen);
566 free(portal);
567 return (1);
568 }
569 if (arg[0] == '[') {
570 /*
571 * IPv6 address in square brackets, perhaps with port.
572 */
573 arg++;
574 addr = strsep(&arg, "]");
575 if (arg == NULL) {
576 log_warnx("invalid listen address %s",
577 portal->p_listen);
578 free(portal->p_listen);
579 free(portal);
580 return (1);
581 }
582 if (arg[0] == '\0') {
583 port = "3260";
584 } else if (arg[0] == ':') {
585 port = arg + 1;
586 } else {
587 log_warnx("invalid listen address %s",
588 portal->p_listen);
589 free(portal->p_listen);
590 free(portal);
591 return (1);
592 }
593 } else {
594 /*
595 * Either IPv6 address without brackets - and without
596 * a port - or IPv4 address. Just count the colons.
597 */
598 for (ch = arg; *ch != '\0'; ch++) {
599 if (*ch == ':')
600 colons++;
601 }
602 if (colons > 1) {
603 addr = arg;
604 port = "3260";
605 } else {
606 addr = strsep(&arg, ":");
607 if (arg == NULL)
608 port = "3260";
609 else
610 port = arg;
611 }
612 }
613
614 memset(&hints, 0, sizeof(hints));
615 hints.ai_family = PF_UNSPEC;
616 hints.ai_socktype = SOCK_STREAM;
617 hints.ai_flags = AI_PASSIVE;
618
619 error = getaddrinfo(addr, port, &hints, &portal->p_ai);
620 if (error != 0) {
621 log_warnx("getaddrinfo for %s failed: %s",
622 portal->p_listen, gai_strerror(error));
623 free(portal->p_listen);
624 free(portal);
625 return (1);
626 }
627
628 /*
629 * XXX: getaddrinfo(3) may return multiple addresses; we should turn
630 * those into multiple portals.
631 */
632
633 return (0);
634}
635
636static bool
637valid_hex(const char ch)
638{
639 switch (ch) {
640 case '0':
641 case '1':
642 case '2':
643 case '3':
644 case '4':
645 case '5':
646 case '6':
647 case '7':
648 case '8':
649 case '9':
650 case 'a':
651 case 'A':
652 case 'b':
653 case 'B':
654 case 'c':
655 case 'C':
656 case 'd':
657 case 'D':
658 case 'e':
659 case 'E':
660 case 'f':
661 case 'F':
662 return (true);
663 default:
664 return (false);
665 }
666}
667
668bool
669valid_iscsi_name(const char *name)
670{
671 int i;
672
673 if (strlen(name) >= MAX_NAME_LEN) {
674 log_warnx("overlong name for target \"%s\"; max length allowed "
675 "by iSCSI specification is %d characters",
676 name, MAX_NAME_LEN);
677 return (false);
678 }
679
680 /*
681 * In the cases below, we don't return an error, just in case the admin
682 * was right, and we're wrong.
683 */
684 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) {
685 for (i = strlen("iqn."); name[i] != '\0'; i++) {
686 /*
687 * XXX: We should verify UTF-8 normalisation, as defined
688 * by 3.2.6.2: iSCSI Name Encoding.
689 */
690 if (isalnum(name[i]))
691 continue;
692 if (name[i] == '-' || name[i] == '.' || name[i] == ':')
693 continue;
694 log_warnx("invalid character \"%c\" in target name "
695 "\"%s\"; allowed characters are letters, digits, "
696 "'-', '.', and ':'", name[i], name);
697 break;
698 }
699 /*
700 * XXX: Check more stuff: valid date and a valid reversed domain.
701 */
702 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) {
703 if (strlen(name) != strlen("eui.") + 16)
704 log_warnx("invalid target name \"%s\"; the \"eui.\" "
705 "should be followed by exactly 16 hexadecimal "
706 "digits", name);
707 for (i = strlen("eui."); name[i] != '\0'; i++) {
708 if (!valid_hex(name[i])) {
709 log_warnx("invalid character \"%c\" in target "
710 "name \"%s\"; allowed characters are 1-9 "
711 "and A-F", name[i], name);
712 break;
713 }
714 }
715 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) {
716 if (strlen(name) > strlen("naa.") + 32)
717 log_warnx("invalid target name \"%s\"; the \"naa.\" "
718 "should be followed by at most 32 hexadecimal "
719 "digits", name);
720 for (i = strlen("naa."); name[i] != '\0'; i++) {
721 if (!valid_hex(name[i])) {
722 log_warnx("invalid character \"%c\" in target "
723 "name \"%s\"; allowed characters are 1-9 "
724 "and A-F", name[i], name);
725 break;
726 }
727 }
728 } else {
729 log_warnx("invalid target name \"%s\"; should start with "
730 "either \".iqn\", \"eui.\", or \"naa.\"",
731 name);
732 }
733 return (true);
734}
735
736struct target *
737target_new(struct conf *conf, const char *name)
738{
739 struct target *targ;
740 int i, len;
741
742 targ = target_find(conf, name);
743 if (targ != NULL) {
744 log_warnx("duplicated target \"%s\"", name);
745 return (NULL);
746 }
747 if (valid_iscsi_name(name) == false) {
748 log_warnx("target name \"%s\" is invalid", name);
749 return (NULL);
750 }
751 targ = calloc(1, sizeof(*targ));
752 if (targ == NULL)
753 log_err(1, "calloc");
754 targ->t_name = checked_strdup(name);
755
756 /*
757 * RFC 3722 requires us to normalize the name to lowercase.
758 */
759 len = strlen(name);
760 for (i = 0; i < len; i++)
761 targ->t_name[i] = tolower(targ->t_name[i]);
762
763 TAILQ_INIT(&targ->t_luns);
764 targ->t_conf = conf;
765 TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next);
766
767 return (targ);
768}
769
770void
771target_delete(struct target *targ)
772{
773 struct lun *lun, *tmp;
774
775 TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next);
776
777 TAILQ_FOREACH_SAFE(lun, &targ->t_luns, l_next, tmp)
778 lun_delete(lun);
779 free(targ->t_name);
780 free(targ);
781}
782
783struct target *
784target_find(struct conf *conf, const char *name)
785{
786 struct target *targ;
787
788 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
789 if (strcasecmp(targ->t_name, name) == 0)
790 return (targ);
791 }
792
793 return (NULL);
794}
795
796struct lun *
797lun_new(struct target *targ, int lun_id)
798{
799 struct lun *lun;
800
801 lun = lun_find(targ, lun_id);
802 if (lun != NULL) {
803 log_warnx("duplicated lun %d for target \"%s\"",
804 lun_id, targ->t_name);
805 return (NULL);
806 }
807
808 lun = calloc(1, sizeof(*lun));
809 if (lun == NULL)
810 log_err(1, "calloc");
811 lun->l_lun = lun_id;
812 TAILQ_INIT(&lun->l_options);
813 lun->l_target = targ;
814 TAILQ_INSERT_TAIL(&targ->t_luns, lun, l_next);
815
816 return (lun);
817}
818
819void
820lun_delete(struct lun *lun)
821{
822 struct lun_option *lo, *tmp;
823
824 TAILQ_REMOVE(&lun->l_target->t_luns, lun, l_next);
825
826 TAILQ_FOREACH_SAFE(lo, &lun->l_options, lo_next, tmp)
827 lun_option_delete(lo);
828 free(lun->l_backend);
829 free(lun->l_device_id);
830 free(lun->l_path);
831 free(lun->l_serial);
832 free(lun);
833}
834
835struct lun *
836lun_find(struct target *targ, int lun_id)
837{
838 struct lun *lun;
839
840 TAILQ_FOREACH(lun, &targ->t_luns, l_next) {
841 if (lun->l_lun == lun_id)
842 return (lun);
843 }
844
845 return (NULL);
846}
847
848void
849lun_set_backend(struct lun *lun, const char *value)
850{
851 free(lun->l_backend);
852 lun->l_backend = checked_strdup(value);
853}
854
855void
856lun_set_blocksize(struct lun *lun, size_t value)
857{
858
859 lun->l_blocksize = value;
860}
861
862void
863lun_set_device_id(struct lun *lun, const char *value)
864{
865 free(lun->l_device_id);
866 lun->l_device_id = checked_strdup(value);
867}
868
869void
870lun_set_path(struct lun *lun, const char *value)
871{
872 free(lun->l_path);
873 lun->l_path = checked_strdup(value);
874}
875
876void
877lun_set_serial(struct lun *lun, const char *value)
878{
879 free(lun->l_serial);
880 lun->l_serial = checked_strdup(value);
881}
882
883void
884lun_set_size(struct lun *lun, size_t value)
885{
886
887 lun->l_size = value;
888}
889
890void
891lun_set_ctl_lun(struct lun *lun, uint32_t value)
892{
893
894 lun->l_ctl_lun = value;
895}
896
897struct lun_option *
898lun_option_new(struct lun *lun, const char *name, const char *value)
899{
900 struct lun_option *lo;
901
902 lo = lun_option_find(lun, name);
903 if (lo != NULL) {
904 log_warnx("duplicated lun option %s for lun %d, target \"%s\"",
905 name, lun->l_lun, lun->l_target->t_name);
906 return (NULL);
907 }
908
909 lo = calloc(1, sizeof(*lo));
910 if (lo == NULL)
911 log_err(1, "calloc");
912 lo->lo_name = checked_strdup(name);
913 lo->lo_value = checked_strdup(value);
914 lo->lo_lun = lun;
915 TAILQ_INSERT_TAIL(&lun->l_options, lo, lo_next);
916
917 return (lo);
918}
919
920void
921lun_option_delete(struct lun_option *lo)
922{
923
924 TAILQ_REMOVE(&lo->lo_lun->l_options, lo, lo_next);
925
926 free(lo->lo_name);
927 free(lo->lo_value);
928 free(lo);
929}
930
931struct lun_option *
932lun_option_find(struct lun *lun, const char *name)
933{
934 struct lun_option *lo;
935
936 TAILQ_FOREACH(lo, &lun->l_options, lo_next) {
937 if (strcmp(lo->lo_name, name) == 0)
938 return (lo);
939 }
940
941 return (NULL);
942}
943
944void
945lun_option_set(struct lun_option *lo, const char *value)
946{
947
948 free(lo->lo_value);
949 lo->lo_value = checked_strdup(value);
950}
951
952static struct connection *
953connection_new(struct portal *portal, int fd, const char *host)
954{
955 struct connection *conn;
956
957 conn = calloc(1, sizeof(*conn));
958 if (conn == NULL)
959 log_err(1, "calloc");
960 conn->conn_portal = portal;
961 conn->conn_socket = fd;
962 conn->conn_initiator_addr = checked_strdup(host);
963
964 /*
965 * Default values, from RFC 3720, section 12.
966 */
967 conn->conn_max_data_segment_length = 8192;
968 conn->conn_max_burst_length = 262144;
969 conn->conn_immediate_data = true;
970
971 return (conn);
972}
973
974#if 0
975static void
976conf_print(struct conf *conf)
977{
978 struct auth_group *ag;
979 struct auth *auth;
980 struct auth_name *auth_name;
981 struct auth_portal *auth_portal;
982 struct portal_group *pg;
983 struct portal *portal;
984 struct target *targ;
985 struct lun *lun;
986 struct lun_option *lo;
987
988 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
989 fprintf(stderr, "auth-group %s {\n", ag->ag_name);
990 TAILQ_FOREACH(auth, &ag->ag_auths, a_next)
991 fprintf(stderr, "\t chap-mutual %s %s %s %s\n",
992 auth->a_user, auth->a_secret,
993 auth->a_mutual_user, auth->a_mutual_secret);
994 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next)
995 fprintf(stderr, "\t initiator-name %s\n",
996 auth_name->an_initator_name);
997 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next)
998 fprintf(stderr, "\t initiator-portal %s\n",
999 auth_portal->an_initator_portal);
1000 fprintf(stderr, "}\n");
1001 }
1002 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1003 fprintf(stderr, "portal-group %s {\n", pg->pg_name);
1004 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
1005 fprintf(stderr, "\t listen %s\n", portal->p_listen);
1006 fprintf(stderr, "}\n");
1007 }
1008 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1009 fprintf(stderr, "target %s {\n", targ->t_name);
1010 if (targ->t_alias != NULL)
1011 fprintf(stderr, "\t alias %s\n", targ->t_alias);
1012 TAILQ_FOREACH(lun, &targ->t_luns, l_next) {
1013 fprintf(stderr, "\tlun %d {\n", lun->l_lun);
1014 fprintf(stderr, "\t\tpath %s\n", lun->l_path);
1015 TAILQ_FOREACH(lo, &lun->l_options, lo_next)
1016 fprintf(stderr, "\t\toption %s %s\n",
1017 lo->lo_name, lo->lo_value);
1018 fprintf(stderr, "\t}\n");
1019 }
1020 fprintf(stderr, "}\n");
1021 }
1022}
1023#endif
1024
1025static int
1026conf_verify_lun(struct lun *lun)
1027{
1028 const struct lun *lun2;
1029 const struct target *targ2;
1030
1031 if (lun->l_backend == NULL)
1032 lun_set_backend(lun, "block");
1033 if (strcmp(lun->l_backend, "block") == 0) {
1034 if (lun->l_path == NULL) {
1035 log_warnx("missing path for lun %d, target \"%s\"",
1036 lun->l_lun, lun->l_target->t_name);
1037 return (1);
1038 }
1039 } else if (strcmp(lun->l_backend, "ramdisk") == 0) {
1040 if (lun->l_size == 0) {
1041 log_warnx("missing size for ramdisk-backed lun %d, "
1042 "target \"%s\"", lun->l_lun, lun->l_target->t_name);
1043 return (1);
1044 }
1045 if (lun->l_path != NULL) {
1046 log_warnx("path must not be specified "
1047 "for ramdisk-backed lun %d, target \"%s\"",
1048 lun->l_lun, lun->l_target->t_name);
1049 return (1);
1050 }
1051 }
1052 if (lun->l_lun < 0 || lun->l_lun > 255) {
1053 log_warnx("invalid lun number for lun %d, target \"%s\"; "
1054 "must be between 0 and 255", lun->l_lun,
1055 lun->l_target->t_name);
1056 return (1);
1057 }
1058 if (lun->l_blocksize == 0) {
1059 lun_set_blocksize(lun, DEFAULT_BLOCKSIZE);
1060 } else if (lun->l_blocksize < 0) {
1061 log_warnx("invalid blocksize for lun %d, target \"%s\"; "
1062 "must be larger than 0", lun->l_lun, lun->l_target->t_name);
1063 return (1);
1064 }
1065 if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) {
1066 log_warnx("invalid size for lun %d, target \"%s\"; "
1067 "must be multiple of blocksize", lun->l_lun,
1068 lun->l_target->t_name);
1069 return (1);
1070 }
1071 TAILQ_FOREACH(targ2, &lun->l_target->t_conf->conf_targets, t_next) {
1072 TAILQ_FOREACH(lun2, &targ2->t_luns, l_next) {
1073 if (lun == lun2)
1074 continue;
1075 if (lun->l_path != NULL && lun2->l_path != NULL &&
1076 strcmp(lun->l_path, lun2->l_path) == 0) {
1077 log_debugx("WARNING: path \"%s\" duplicated "
1078 "between lun %d, target \"%s\", and "
1079 "lun %d, target \"%s\"", lun->l_path,
1080 lun->l_lun, lun->l_target->t_name,
1081 lun2->l_lun, lun2->l_target->t_name);
1082 }
1083 }
1084 }
1085
1086 return (0);
1087}
1088
1089int
1090conf_verify(struct conf *conf)
1091{
1092 struct auth_group *ag;
1093 struct portal_group *pg;
1094 struct target *targ;
1095 struct lun *lun;
1096 bool found_lun;
1097 int error;
1098
1099 if (conf->conf_pidfile_path == NULL)
1100 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE);
1101
1102 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1103 if (targ->t_auth_group == NULL) {
1104 targ->t_auth_group = auth_group_find(conf,
1105 "default");
1106 assert(targ->t_auth_group != NULL);
1107 }
1108 if (targ->t_portal_group == NULL) {
1109 targ->t_portal_group = portal_group_find(conf,
1110 "default");
1111 assert(targ->t_portal_group != NULL);
1112 }
1113 found_lun = false;
1114 TAILQ_FOREACH(lun, &targ->t_luns, l_next) {
1115 error = conf_verify_lun(lun);
1116 if (error != 0)
1117 return (error);
1118 found_lun = true;
1119 }
1120 if (!found_lun) {
1121 log_warnx("no LUNs defined for target \"%s\"",
1122 targ->t_name);
1123 return (1);
1124 }
1125 }
1126 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1127 assert(pg->pg_name != NULL);
1128 if (pg->pg_discovery_auth_group == NULL) {
1129 pg->pg_discovery_auth_group =
1130 auth_group_find(conf, "default");
1131 assert(pg->pg_discovery_auth_group != NULL);
1132 }
1133
1134 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1135 if (targ->t_portal_group == pg)
1136 break;
1137 }
1138 if (targ == NULL) {
1139 if (strcmp(pg->pg_name, "default") != 0)
1140 log_warnx("portal-group \"%s\" not assigned "
1141 "to any target", pg->pg_name);
1142 pg->pg_unassigned = true;
1143 } else
1144 pg->pg_unassigned = false;
1145 }
1146 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1147 if (ag->ag_name == NULL)
1148 assert(ag->ag_target != NULL);
1149 else
1150 assert(ag->ag_target == NULL);
1151
1152 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1153 if (targ->t_auth_group == ag)
1154 break;
1155 }
1156 if (targ == NULL && ag->ag_name != NULL &&
1157 strcmp(ag->ag_name, "default") != 0 &&
1158 strcmp(ag->ag_name, "no-authentication") != 0 &&
1159 strcmp(ag->ag_name, "no-access") != 0) {
1160 log_warnx("auth-group \"%s\" not assigned "
1161 "to any target", ag->ag_name);
1162 }
1163 }
1164
1165 return (0);
1166}
1167
1168static int
1169conf_apply(struct conf *oldconf, struct conf *newconf)
1170{
1171 struct target *oldtarg, *newtarg, *tmptarg;
1172 struct lun *oldlun, *newlun, *tmplun;
1173 struct portal_group *oldpg, *newpg;
1174 struct portal *oldp, *newp;
1175 pid_t otherpid;
1176 int changed, cumulated_error = 0, error;
1177 int one = 1;
1178
1179 if (oldconf->conf_debug != newconf->conf_debug) {
1180 log_debugx("changing debug level to %d", newconf->conf_debug);
1181 log_init(newconf->conf_debug);
1182 }
1183
1184 if (oldconf->conf_pidfh != NULL) {
1185 assert(oldconf->conf_pidfile_path != NULL);
1186 if (newconf->conf_pidfile_path != NULL &&
1187 strcmp(oldconf->conf_pidfile_path,
1188 newconf->conf_pidfile_path) == 0) {
1189 newconf->conf_pidfh = oldconf->conf_pidfh;
1190 oldconf->conf_pidfh = NULL;
1191 } else {
1192 log_debugx("removing pidfile %s",
1193 oldconf->conf_pidfile_path);
1194 pidfile_remove(oldconf->conf_pidfh);
1195 oldconf->conf_pidfh = NULL;
1196 }
1197 }
1198
1199 if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) {
1200 log_debugx("opening pidfile %s", newconf->conf_pidfile_path);
1201 newconf->conf_pidfh =
1202 pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid);
1203 if (newconf->conf_pidfh == NULL) {
1204 if (errno == EEXIST)
1205 log_errx(1, "daemon already running, pid: %jd.",
1206 (intmax_t)otherpid);
1207 log_err(1, "cannot open or create pidfile \"%s\"",
1208 newconf->conf_pidfile_path);
1209 }
1210 }
1211
1212 TAILQ_FOREACH_SAFE(oldtarg, &oldconf->conf_targets, t_next, tmptarg) {
1213 /*
1214 * First, remove any targets present in the old configuration
1215 * and missing in the new one.
1216 */
1217 newtarg = target_find(newconf, oldtarg->t_name);
1218 if (newtarg == NULL) {
1219 TAILQ_FOREACH_SAFE(oldlun, &oldtarg->t_luns, l_next,
1220 tmplun) {
1221 log_debugx("target %s not found in new "
1222 "configuration; removing its lun %d, "
1223 "backed by CTL lun %d",
1224 oldtarg->t_name, oldlun->l_lun,
1225 oldlun->l_ctl_lun);
1226 error = kernel_lun_remove(oldlun);
1227 if (error != 0) {
1228 log_warnx("failed to remove lun %d, "
1229 "target %s, CTL lun %d",
1230 oldlun->l_lun, oldtarg->t_name,
1231 oldlun->l_ctl_lun);
1232 cumulated_error++;
1233 }
1234 lun_delete(oldlun);
1235 }
1236 target_delete(oldtarg);
1237 continue;
1238 }
1239
1240 /*
1241 * Second, remove any LUNs present in the old target
1242 * and missing in the new one.
1243 */
1244 TAILQ_FOREACH_SAFE(oldlun, &oldtarg->t_luns, l_next, tmplun) {
1245 newlun = lun_find(newtarg, oldlun->l_lun);
1246 if (newlun == NULL) {
1247 log_debugx("lun %d, target %s, CTL lun %d "
1248 "not found in new configuration; "
1249 "removing", oldlun->l_lun, oldtarg->t_name,
1250 oldlun->l_ctl_lun);
1251 error = kernel_lun_remove(oldlun);
1252 if (error != 0) {
1253 log_warnx("failed to remove lun %d, "
1254 "target %s, CTL lun %d",
1255 oldlun->l_lun, oldtarg->t_name,
1256 oldlun->l_ctl_lun);
1257 cumulated_error++;
1258 }
1259 lun_delete(oldlun);
1260 continue;
1261 }
1262
1263 /*
1264 * Also remove the LUNs changed by more than size.
1265 */
1266 changed = 0;
1267 assert(oldlun->l_backend != NULL);
1268 assert(newlun->l_backend != NULL);
1269 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) {
1270 log_debugx("backend for lun %d, target %s, "
1271 "CTL lun %d changed; removing",
1272 oldlun->l_lun, oldtarg->t_name,
1273 oldlun->l_ctl_lun);
1274 changed = 1;
1275 }
1276 if (oldlun->l_blocksize != newlun->l_blocksize) {
1277 log_debugx("blocksize for lun %d, target %s, "
1278 "CTL lun %d changed; removing",
1279 oldlun->l_lun, oldtarg->t_name,
1280 oldlun->l_ctl_lun);
1281 changed = 1;
1282 }
1283 if (newlun->l_device_id != NULL &&
1284 (oldlun->l_device_id == NULL ||
1285 strcmp(oldlun->l_device_id, newlun->l_device_id) !=
1286 0)) {
1287 log_debugx("device-id for lun %d, target %s, "
1288 "CTL lun %d changed; removing",
1289 oldlun->l_lun, oldtarg->t_name,
1290 oldlun->l_ctl_lun);
1291 changed = 1;
1292 }
1293 if (newlun->l_path != NULL &&
1294 (oldlun->l_path == NULL ||
1295 strcmp(oldlun->l_path, newlun->l_path) != 0)) {
1296 log_debugx("path for lun %d, target %s, "
1297 "CTL lun %d, changed; removing",
1298 oldlun->l_lun, oldtarg->t_name,
1299 oldlun->l_ctl_lun);
1300 changed = 1;
1301 }
1302 if (newlun->l_serial != NULL &&
1303 (oldlun->l_serial == NULL ||
1304 strcmp(oldlun->l_serial, newlun->l_serial) != 0)) {
1305 log_debugx("serial for lun %d, target %s, "
1306 "CTL lun %d changed; removing",
1307 oldlun->l_lun, oldtarg->t_name,
1308 oldlun->l_ctl_lun);
1309 changed = 1;
1310 }
1311 if (changed) {
1312 error = kernel_lun_remove(oldlun);
1313 if (error != 0) {
1314 log_warnx("failed to remove lun %d, "
1315 "target %s, CTL lun %d",
1316 oldlun->l_lun, oldtarg->t_name,
1317 oldlun->l_ctl_lun);
1318 cumulated_error++;
1319 }
1320 lun_delete(oldlun);
1321 continue;
1322 }
1323
1324 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun);
1325 }
1326 }
1327
1328 /*
1329 * Now add new targets or modify existing ones.
1330 */
1331 TAILQ_FOREACH(newtarg, &newconf->conf_targets, t_next) {
1332 oldtarg = target_find(oldconf, newtarg->t_name);
1333
1334 TAILQ_FOREACH(newlun, &newtarg->t_luns, l_next) {
1335 if (oldtarg != NULL) {
1336 oldlun = lun_find(oldtarg, newlun->l_lun);
1337 if (oldlun != NULL) {
1338 if (newlun->l_size != oldlun->l_size) {
1339 log_debugx("resizing lun %d, "
1340 "target %s, CTL lun %d",
1341 newlun->l_lun,
1342 newtarg->t_name,
1343 newlun->l_ctl_lun);
1344 error =
1345 kernel_lun_resize(newlun);
1346 if (error != 0) {
1347 log_warnx("failed to "
1348 "resize lun %d, "
1349 "target %s, "
1350 "CTL lun %d",
1351 newlun->l_lun,
1352 newtarg->t_name,
1353 newlun->l_lun);
1354 cumulated_error++;
1355 }
1356 }
1357 continue;
1358 }
1359 }
1360 log_debugx("adding lun %d, target %s",
1361 newlun->l_lun, newtarg->t_name);
1362 error = kernel_lun_add(newlun);
1363 if (error != 0) {
1364 log_warnx("failed to add lun %d, target %s",
1365 newlun->l_lun, newtarg->t_name);
1366 cumulated_error++;
1367 }
1368 }
1369 }
1370
1371 /*
1372 * Go through the new portals, opening the sockets as neccessary.
1373 */
1374 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
1375 if (newpg->pg_unassigned) {
1376 log_debugx("not listening on portal-group \"%s\", "
1377 "not assigned to any target",
1378 newpg->pg_name);
1379 continue;
1380 }
1381 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) {
1382 /*
1383 * Try to find already open portal and reuse
1384 * the listening socket. We don't care about
1385 * what portal or portal group that was, what
1386 * matters is the listening address.
1387 */
1388 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups,
1389 pg_next) {
1390 TAILQ_FOREACH(oldp, &oldpg->pg_portals,
1391 p_next) {
1392 if (strcmp(newp->p_listen,
1393 oldp->p_listen) == 0 &&
1394 oldp->p_socket > 0) {
1395 newp->p_socket =
1396 oldp->p_socket;
1397 oldp->p_socket = 0;
1398 break;
1399 }
1400 }
1401 }
1402 if (newp->p_socket > 0) {
1403 /*
1404 * We're done with this portal.
1405 */
1406 continue;
1407 }
1408
1409#ifdef ICL_KERNEL_PROXY
1410 if (proxy_mode) {
1411 newpg->pg_conf->conf_portal_id++;
1412 newp->p_id = newpg->pg_conf->conf_portal_id;
1413 log_debugx("listening on %s, portal-group "
1414 "\"%s\", portal id %d, using ICL proxy",
1415 newp->p_listen, newpg->pg_name, newp->p_id);
1416 kernel_listen(newp->p_ai, newp->p_iser,
1417 newp->p_id);
1418 continue;
1419 }
1420#endif
1421 assert(proxy_mode == false);
1422 assert(newp->p_iser == false);
1423
1424 log_debugx("listening on %s, portal-group \"%s\"",
1425 newp->p_listen, newpg->pg_name);
1426 newp->p_socket = socket(newp->p_ai->ai_family,
1427 newp->p_ai->ai_socktype,
1428 newp->p_ai->ai_protocol);
1429 if (newp->p_socket < 0) {
1430 log_warn("socket(2) failed for %s",
1431 newp->p_listen);
1432 cumulated_error++;
1433 continue;
1434 }
1435 error = setsockopt(newp->p_socket, SOL_SOCKET,
1436 SO_REUSEADDR, &one, sizeof(one));
1437 if (error != 0) {
1438 log_warn("setsockopt(SO_REUSEADDR) failed "
1439 "for %s", newp->p_listen);
1440 close(newp->p_socket);
1441 newp->p_socket = 0;
1442 cumulated_error++;
1443 continue;
1444 }
1445 error = bind(newp->p_socket, newp->p_ai->ai_addr,
1446 newp->p_ai->ai_addrlen);
1447 if (error != 0) {
1448 log_warn("bind(2) failed for %s",
1449 newp->p_listen);
1450 close(newp->p_socket);
1451 newp->p_socket = 0;
1452 cumulated_error++;
1453 continue;
1454 }
1455 error = listen(newp->p_socket, -1);
1456 if (error != 0) {
1457 log_warn("listen(2) failed for %s",
1458 newp->p_listen);
1459 close(newp->p_socket);
1460 newp->p_socket = 0;
1461 cumulated_error++;
1462 continue;
1463 }
1464 }
1465 }
1466
1467 /*
1468 * Go through the no longer used sockets, closing them.
1469 */
1470 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) {
1471 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) {
1472 if (oldp->p_socket <= 0)
1473 continue;
1474 log_debugx("closing socket for %s, portal-group \"%s\"",
1475 oldp->p_listen, oldpg->pg_name);
1476 close(oldp->p_socket);
1477 oldp->p_socket = 0;
1478 }
1479 }
1480
1481 return (cumulated_error);
1482}
1483
1484bool
1485timed_out(void)
1486{
1487
1488 return (sigalrm_received);
1489}
1490
1491static void
1492sigalrm_handler(int dummy __unused)
1493{
1494 /*
1495 * It would be easiest to just log an error and exit. We can't
1496 * do this, though, because log_errx() is not signal safe, since
1497 * it calls syslog(3). Instead, set a flag checked by pdu_send()
1498 * and pdu_receive(), to call log_errx() there. Should they fail
1499 * to notice, we'll exit here one second later.
1500 */
1501 if (sigalrm_received) {
1502 /*
1503 * Oh well. Just give up and quit.
1504 */
1505 _exit(2);
1506 }
1507
1508 sigalrm_received = true;
1509}
1510
1511static void
1512set_timeout(const struct conf *conf)
1513{
1514 struct sigaction sa;
1515 struct itimerval itv;
1516 int error;
1517
1518 if (conf->conf_timeout <= 0) {
1519 log_debugx("session timeout disabled");
1520 return;
1521 }
1522
1523 bzero(&sa, sizeof(sa));
1524 sa.sa_handler = sigalrm_handler;
1525 sigfillset(&sa.sa_mask);
1526 error = sigaction(SIGALRM, &sa, NULL);
1527 if (error != 0)
1528 log_err(1, "sigaction");
1529
1530 /*
1531 * First SIGALRM will arive after conf_timeout seconds.
1532 * If we do nothing, another one will arrive a second later.
1533 */
1534 bzero(&itv, sizeof(itv));
1535 itv.it_interval.tv_sec = 1;
1536 itv.it_value.tv_sec = conf->conf_timeout;
1537
1538 log_debugx("setting session timeout to %d seconds",
1539 conf->conf_timeout);
1540 error = setitimer(ITIMER_REAL, &itv, NULL);
1541 if (error != 0)
1542 log_err(1, "setitimer");
1543}
1544
1545static int
1546wait_for_children(bool block)
1547{
1548 pid_t pid;
1549 int status;
1550 int num = 0;
1551
1552 for (;;) {
1553 /*
1554 * If "block" is true, wait for at least one process.
1555 */
1556 if (block && num == 0)
1557 pid = wait4(-1, &status, 0, NULL);
1558 else
1559 pid = wait4(-1, &status, WNOHANG, NULL);
1560 if (pid <= 0)
1561 break;
1562 if (WIFSIGNALED(status)) {
1563 log_warnx("child process %d terminated with signal %d",
1564 pid, WTERMSIG(status));
1565 } else if (WEXITSTATUS(status) != 0) {
1566 log_warnx("child process %d terminated with exit status %d",
1567 pid, WEXITSTATUS(status));
1568 } else {
1569 log_debugx("child process %d terminated gracefully", pid);
1570 }
1571 num++;
1572 }
1573
1574 return (num);
1575}
1576
1577static void
1578handle_connection(struct portal *portal, int fd, bool dont_fork)
1579{
1580 struct connection *conn;
1581 struct sockaddr_storage ss;
1582 socklen_t sslen = sizeof(ss);
1583 int error;
1584 pid_t pid;
1585 char host[NI_MAXHOST + 1];
1586 struct conf *conf;
1587
1588 conf = portal->p_portal_group->pg_conf;
1589
1590 if (dont_fork) {
1591 log_debugx("incoming connection; not forking due to -d flag");
1592 } else {
1593 nchildren -= wait_for_children(false);
1594 assert(nchildren >= 0);
1595
1596 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) {
1597 log_debugx("maxproc limit of %d child processes hit; "
1598 "waiting for child process to exit", conf->conf_maxproc);
1599 nchildren -= wait_for_children(true);
1600 assert(nchildren >= 0);
1601 }
1602 log_debugx("incoming connection; forking child process #%d",
1603 nchildren);
1604 nchildren++;
1605 pid = fork();
1606 if (pid < 0)
1607 log_err(1, "fork");
1608 if (pid > 0) {
1609 close(fd);
1610 return;
1611 }
1612 }
1613 pidfile_close(conf->conf_pidfh);
1614
1615#ifdef ICL_KERNEL_PROXY
1616 /*
1617 * XXX
1618 */
1619 if (proxy_mode) {
1620 log_set_peer_addr("XXX");
1621 } else {
1622#endif
1623 assert(proxy_mode == false);
1624 error = getpeername(fd, (struct sockaddr *)&ss, &sslen);
1625 if (error != 0)
1626 log_err(1, "getpeername");
1627 error = getnameinfo((struct sockaddr *)&ss, sslen,
1628 host, sizeof(host), NULL, 0, NI_NUMERICHOST);
1629 if (error != 0)
1630 log_errx(1, "getaddrinfo: %s", gai_strerror(error));
1631
1632 log_debugx("accepted connection from %s; portal group \"%s\"",
1633 host, portal->p_portal_group->pg_name);
1634 log_set_peer_addr(host);
1635 setproctitle("%s", host);
1636#ifdef ICL_KERNEL_PROXY
1637 }
1638#endif
1639
1640 conn = connection_new(portal, fd, host);
1641 set_timeout(conf);
1642 kernel_capsicate();
1643 login(conn);
1644 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
1645 kernel_handoff(conn);
1646 log_debugx("connection handed off to the kernel");
1647 } else {
1648 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
1649 discovery(conn);
1650 }
1651 log_debugx("nothing more to do; exiting");
1652 exit(0);
1653}
1654
1655static int
1656fd_add(int fd, fd_set *fdset, int nfds)
1657{
1658
1659 /*
1660 * Skip sockets which we failed to bind.
1661 */
1662 if (fd <= 0)
1663 return (nfds);
1664
1665 FD_SET(fd, fdset);
1666 if (fd > nfds)
1667 nfds = fd;
1668 return (nfds);
1669}
1670
1671static void
1672main_loop(struct conf *conf, bool dont_fork)
1673{
1674 struct portal_group *pg;
1675 struct portal *portal;
1676#ifdef ICL_KERNEL_PROXY
1677 int connection_id;
1678 int portal_id;
1679#endif
1680 fd_set fdset;
1681 int error, nfds, client_fd;
1682
1683 pidfile_write(conf->conf_pidfh);
1684
1685 for (;;) {
1686 if (sighup_received || sigterm_received)
1687 return;
1688
1689#ifdef ICL_KERNEL_PROXY
1690 if (proxy_mode) {
1691 kernel_accept(&connection_id, &portal_id);
1692
1693 log_debugx("incoming connection, id %d, portal id %d",
1694 connection_id, portal_id);
1695 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1696 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
1697 if (portal->p_id == portal_id) {
1698 goto found;
1699 }
1700 }
1701 }
1702
1703 log_errx(1, "kernel returned invalid portal_id %d",
1704 portal_id);
1705
1706found:
1707 handle_connection(portal, connection_id, dont_fork);
1708 } else {
1709#endif
1710 assert(proxy_mode == false);
1711
1712 FD_ZERO(&fdset);
1713 nfds = 0;
1714 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1715 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
1716 nfds = fd_add(portal->p_socket, &fdset, nfds);
1717 }
1718 error = select(nfds + 1, &fdset, NULL, NULL, NULL);
1719 if (error <= 0) {
1720 if (errno == EINTR)
1721 return;
1722 log_err(1, "select");
1723 }
1724 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1725 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
1726 if (!FD_ISSET(portal->p_socket, &fdset))
1727 continue;
1728 client_fd = accept(portal->p_socket, NULL, 0);
1729 if (client_fd < 0)
1730 log_err(1, "accept");
1731 handle_connection(portal, client_fd, dont_fork);
1732 break;
1733 }
1734 }
1735#ifdef ICL_KERNEL_PROXY
1736 }
1737#endif
1738 }
1739}
1740
1741static void
1742sighup_handler(int dummy __unused)
1743{
1744
1745 sighup_received = true;
1746}
1747
1748static void
1749sigterm_handler(int dummy __unused)
1750{
1751
1752 sigterm_received = true;
1753}
1754
1755static void
1756sigchld_handler(int dummy __unused)
1757{
1758
1759 /*
1760 * The only purpose of this handler is to make SIGCHLD
1761 * interrupt the ISCSIDWAIT ioctl(2), so we can call
1762 * wait_for_children().
1763 */
1764}
1765
1766static void
1767register_signals(void)
1768{
1769 struct sigaction sa;
1770 int error;
1771
1772 bzero(&sa, sizeof(sa));
1773 sa.sa_handler = sighup_handler;
1774 sigfillset(&sa.sa_mask);
1775 error = sigaction(SIGHUP, &sa, NULL);
1776 if (error != 0)
1777 log_err(1, "sigaction");
1778
1779 sa.sa_handler = sigterm_handler;
1780 error = sigaction(SIGTERM, &sa, NULL);
1781 if (error != 0)
1782 log_err(1, "sigaction");
1783
1784 sa.sa_handler = sigterm_handler;
1785 error = sigaction(SIGINT, &sa, NULL);
1786 if (error != 0)
1787 log_err(1, "sigaction");
1788
1789 sa.sa_handler = sigchld_handler;
1790 error = sigaction(SIGCHLD, &sa, NULL);
1791 if (error != 0)
1792 log_err(1, "sigaction");
1793}
1794
1795int
1796main(int argc, char **argv)
1797{
1798 struct conf *oldconf, *newconf, *tmpconf;
1799 const char *config_path = DEFAULT_CONFIG_PATH;
1800 int debug = 0, ch, error;
1801 bool dont_daemonize = false;
1802
1803 while ((ch = getopt(argc, argv, "df:R")) != -1) {
1804 switch (ch) {
1805 case 'd':
1806 dont_daemonize = true;
1807 debug++;
1808 break;
1809 case 'f':
1810 config_path = optarg;
1811 break;
1812 case 'R':
1813#ifndef ICL_KERNEL_PROXY
1814 log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY "
1815 "does not support iSER protocol");
1816#endif
1817 proxy_mode = true;
1818 break;
1819 case '?':
1820 default:
1821 usage();
1822 }
1823 }
1824 argc -= optind;
1825 if (argc != 0)
1826 usage();
1827
1828 log_init(debug);
1829 kernel_init();
1830
1831 oldconf = conf_new_from_kernel();
1832 newconf = conf_new_from_file(config_path);
1833 if (newconf == NULL)
1834 log_errx(1, "configuration error, exiting");
1835 if (debug > 0) {
1836 oldconf->conf_debug = debug;
1837 newconf->conf_debug = debug;
1838 }
1839
1840 log_debugx("enabling CTL iSCSI port");
1841 error = kernel_port_on();
1842 if (error != 0)
1843 log_errx(1, "failed to enable CTL iSCSI port, exiting");
1844
1845 error = conf_apply(oldconf, newconf);
1846 if (error != 0)
1847 log_errx(1, "failed to apply configuration, exiting");
1848 conf_delete(oldconf);
1849 oldconf = NULL;
1850
1851 register_signals();
1852
1853 if (dont_daemonize == false) {
1854 log_debugx("daemonizing");
1855 if (daemon(0, 0) == -1) {
1856 log_warn("cannot daemonize");
1857 pidfile_remove(newconf->conf_pidfh);
1858 exit(1);
1859 }
1860 }
1861
1862 for (;;) {
1863 main_loop(newconf, dont_daemonize);
1864 if (sighup_received) {
1865 sighup_received = false;
1866 log_debugx("received SIGHUP, reloading configuration");
1867 tmpconf = conf_new_from_file(config_path);
1868 if (tmpconf == NULL) {
1869 log_warnx("configuration error, "
1870 "continuing with old configuration");
1871 } else {
1872 if (debug > 0)
1873 tmpconf->conf_debug = debug;
1874 oldconf = newconf;
1875 newconf = tmpconf;
1876 error = conf_apply(oldconf, newconf);
1877 if (error != 0)
1878 log_warnx("failed to reload "
1879 "configuration");
1880 conf_delete(oldconf);
1881 oldconf = NULL;
1882 }
1883 } else if (sigterm_received) {
1884 log_debugx("exiting on signal; "
1885 "reloading empty configuration");
1886
1887 log_debugx("disabling CTL iSCSI port "
1888 "and terminating all connections");
1889 error = kernel_port_off();
1890 if (error != 0)
1891 log_warnx("failed to disable CTL iSCSI port");
1892
1893 oldconf = newconf;
1894 newconf = conf_new();
1895 if (debug > 0)
1896 newconf->conf_debug = debug;
1897 error = conf_apply(oldconf, newconf);
1898 if (error != 0)
1899 log_warnx("failed to apply configuration");
1900
1901 log_warnx("exiting on signal");
1902 exit(0);
1903 } else {
1904 nchildren -= wait_for_children(false);
1905 assert(nchildren >= 0);
1906 }
1907 }
1908 /* NOTREACHED */
1909}