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 279055 2015-02-20 17:09:49Z 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;
62static uint16_t last_portal_group_tag = 0;
63
64static void
65usage(void)
66{
67
68 fprintf(stderr, "usage: ctld [-d][-f config-file]\n");
69 exit(1);
70}
71
72char *
73checked_strdup(const char *s)
74{
75 char *c;
76
77 c = strdup(s);
78 if (c == NULL)
79 log_err(1, "strdup");
80 return (c);
81}
82
83struct conf *
84conf_new(void)
85{
86 struct conf *conf;
87
88 conf = calloc(1, sizeof(*conf));
89 if (conf == NULL)
90 log_err(1, "calloc");
91 TAILQ_INIT(&conf->conf_luns);
92 TAILQ_INIT(&conf->conf_targets);
93 TAILQ_INIT(&conf->conf_auth_groups);
94 TAILQ_INIT(&conf->conf_ports);
95 TAILQ_INIT(&conf->conf_portal_groups);
96 TAILQ_INIT(&conf->conf_pports);
97 TAILQ_INIT(&conf->conf_isns);
98
99 conf->conf_isns_period = 900;
100 conf->conf_isns_timeout = 5;
101 conf->conf_debug = 0;
102 conf->conf_timeout = 60;
103 conf->conf_maxproc = 30;
104
105 return (conf);
106}
107
108void
109conf_delete(struct conf *conf)
110{
111 struct lun *lun, *ltmp;
112 struct target *targ, *tmp;
113 struct auth_group *ag, *cagtmp;
114 struct portal_group *pg, *cpgtmp;
115 struct pport *pp, *pptmp;
116 struct isns *is, *istmp;
117
118 assert(conf->conf_pidfh == NULL);
119
120 TAILQ_FOREACH_SAFE(lun, &conf->conf_luns, l_next, ltmp)
121 lun_delete(lun);
122 TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp)
123 target_delete(targ);
124 TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp)
125 auth_group_delete(ag);
126 TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp)
127 portal_group_delete(pg);
128 TAILQ_FOREACH_SAFE(pp, &conf->conf_pports, pp_next, pptmp)
129 pport_delete(pp);
130 TAILQ_FOREACH_SAFE(is, &conf->conf_isns, i_next, istmp)
131 isns_delete(is);
132 assert(TAILQ_EMPTY(&conf->conf_ports));
133 free(conf->conf_pidfile_path);
134 free(conf);
135}
136
137static struct auth *
138auth_new(struct auth_group *ag)
139{
140 struct auth *auth;
141
142 auth = calloc(1, sizeof(*auth));
143 if (auth == NULL)
144 log_err(1, "calloc");
145 auth->a_auth_group = ag;
146 TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next);
147 return (auth);
148}
149
150static void
151auth_delete(struct auth *auth)
152{
153 TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next);
154
155 free(auth->a_user);
156 free(auth->a_secret);
157 free(auth->a_mutual_user);
158 free(auth->a_mutual_secret);
159 free(auth);
160}
161
162const struct auth *
163auth_find(const struct auth_group *ag, const char *user)
164{
165 const struct auth *auth;
166
167 TAILQ_FOREACH(auth, &ag->ag_auths, a_next) {
168 if (strcmp(auth->a_user, user) == 0)
169 return (auth);
170 }
171
172 return (NULL);
173}
174
175static void
176auth_check_secret_length(struct auth *auth)
177{
178 size_t len;
179
180 len = strlen(auth->a_secret);
181 if (len > 16) {
182 if (auth->a_auth_group->ag_name != NULL)
183 log_warnx("secret for user \"%s\", auth-group \"%s\", "
184 "is too long; it should be at most 16 characters "
185 "long", auth->a_user, auth->a_auth_group->ag_name);
186 else
187 log_warnx("secret for user \"%s\", target \"%s\", "
188 "is too long; it should be at most 16 characters "
189 "long", auth->a_user,
190 auth->a_auth_group->ag_target->t_name);
191 }
192 if (len < 12) {
193 if (auth->a_auth_group->ag_name != NULL)
194 log_warnx("secret for user \"%s\", auth-group \"%s\", "
195 "is too short; it should be at least 12 characters "
196 "long", auth->a_user,
197 auth->a_auth_group->ag_name);
198 else
199 log_warnx("secret for user \"%s\", target \"%s\", "
200 "is too short; it should be at least 16 characters "
201 "long", auth->a_user,
202 auth->a_auth_group->ag_target->t_name);
203 }
204
205 if (auth->a_mutual_secret != NULL) {
206 len = strlen(auth->a_secret);
207 if (len > 16) {
208 if (auth->a_auth_group->ag_name != NULL)
209 log_warnx("mutual secret for user \"%s\", "
210 "auth-group \"%s\", is too long; it should "
211 "be at most 16 characters long",
212 auth->a_user, auth->a_auth_group->ag_name);
213 else
214 log_warnx("mutual secret for user \"%s\", "
215 "target \"%s\", is too long; it should "
216 "be at most 16 characters long",
217 auth->a_user,
218 auth->a_auth_group->ag_target->t_name);
219 }
220 if (len < 12) {
221 if (auth->a_auth_group->ag_name != NULL)
222 log_warnx("mutual secret for user \"%s\", "
223 "auth-group \"%s\", is too short; it "
224 "should be at least 12 characters long",
225 auth->a_user, auth->a_auth_group->ag_name);
226 else
227 log_warnx("mutual secret for user \"%s\", "
228 "target \"%s\", is too short; it should be "
229 "at least 16 characters long",
230 auth->a_user,
231 auth->a_auth_group->ag_target->t_name);
232 }
233 }
234}
235
236const struct auth *
237auth_new_chap(struct auth_group *ag, const char *user,
238 const char *secret)
239{
240 struct auth *auth;
241
242 if (ag->ag_type == AG_TYPE_UNKNOWN)
243 ag->ag_type = AG_TYPE_CHAP;
244 if (ag->ag_type != AG_TYPE_CHAP) {
245 if (ag->ag_name != NULL)
246 log_warnx("cannot mix \"chap\" authentication with "
247 "other types for auth-group \"%s\"", ag->ag_name);
248 else
249 log_warnx("cannot mix \"chap\" authentication with "
250 "other types for target \"%s\"",
251 ag->ag_target->t_name);
252 return (NULL);
253 }
254
255 auth = auth_new(ag);
256 auth->a_user = checked_strdup(user);
257 auth->a_secret = checked_strdup(secret);
258
259 auth_check_secret_length(auth);
260
261 return (auth);
262}
263
264const struct auth *
265auth_new_chap_mutual(struct auth_group *ag, const char *user,
266 const char *secret, const char *user2, const char *secret2)
267{
268 struct auth *auth;
269
270 if (ag->ag_type == AG_TYPE_UNKNOWN)
271 ag->ag_type = AG_TYPE_CHAP_MUTUAL;
272 if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) {
273 if (ag->ag_name != NULL)
274 log_warnx("cannot mix \"chap-mutual\" authentication "
275 "with other types for auth-group \"%s\"",
276 ag->ag_name);
277 else
278 log_warnx("cannot mix \"chap-mutual\" authentication "
279 "with other types for target \"%s\"",
280 ag->ag_target->t_name);
281 return (NULL);
282 }
283
284 auth = auth_new(ag);
285 auth->a_user = checked_strdup(user);
286 auth->a_secret = checked_strdup(secret);
287 auth->a_mutual_user = checked_strdup(user2);
288 auth->a_mutual_secret = checked_strdup(secret2);
289
290 auth_check_secret_length(auth);
291
292 return (auth);
293}
294
295const struct auth_name *
296auth_name_new(struct auth_group *ag, const char *name)
297{
298 struct auth_name *an;
299
300 an = calloc(1, sizeof(*an));
301 if (an == NULL)
302 log_err(1, "calloc");
303 an->an_auth_group = ag;
304 an->an_initator_name = checked_strdup(name);
305 TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next);
306 return (an);
307}
308
309static void
310auth_name_delete(struct auth_name *an)
311{
312 TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next);
313
314 free(an->an_initator_name);
315 free(an);
316}
317
318bool
319auth_name_defined(const struct auth_group *ag)
320{
321 if (TAILQ_EMPTY(&ag->ag_names))
322 return (false);
323 return (true);
324}
325
326const struct auth_name *
327auth_name_find(const struct auth_group *ag, const char *name)
328{
329 const struct auth_name *auth_name;
330
331 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) {
332 if (strcmp(auth_name->an_initator_name, name) == 0)
333 return (auth_name);
334 }
335
336 return (NULL);
337}
338
339int
340auth_name_check(const struct auth_group *ag, const char *initiator_name)
341{
342 if (!auth_name_defined(ag))
343 return (0);
344
345 if (auth_name_find(ag, initiator_name) == NULL)
346 return (1);
347
348 return (0);
349}
350
351const struct auth_portal *
352auth_portal_new(struct auth_group *ag, const char *portal)
353{
354 struct auth_portal *ap;
355 char *net, *mask, *str, *tmp;
356 int len, dm, m;
357
358 ap = calloc(1, sizeof(*ap));
359 if (ap == NULL)
360 log_err(1, "calloc");
361 ap->ap_auth_group = ag;
362 ap->ap_initator_portal = checked_strdup(portal);
363 mask = str = checked_strdup(portal);
364 net = strsep(&mask, "/");
365 if (net[0] == '[')
366 net++;
367 len = strlen(net);
368 if (len == 0)
369 goto error;
370 if (net[len - 1] == ']')
371 net[len - 1] = 0;
372 if (strchr(net, ':') != NULL) {
373 struct sockaddr_in6 *sin6 =
374 (struct sockaddr_in6 *)&ap->ap_sa;
375
376 sin6->sin6_len = sizeof(*sin6);
377 sin6->sin6_family = AF_INET6;
378 if (inet_pton(AF_INET6, net, &sin6->sin6_addr) <= 0)
379 goto error;
380 dm = 128;
381 } else {
382 struct sockaddr_in *sin =
383 (struct sockaddr_in *)&ap->ap_sa;
384
385 sin->sin_len = sizeof(*sin);
386 sin->sin_family = AF_INET;
387 if (inet_pton(AF_INET, net, &sin->sin_addr) <= 0)
388 goto error;
389 dm = 32;
390 }
391 if (mask != NULL) {
392 m = strtol(mask, &tmp, 0);
393 if (m < 0 || m > dm || tmp[0] != 0)
394 goto error;
395 } else
396 m = dm;
397 ap->ap_mask = m;
398 free(str);
399 TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next);
400 return (ap);
401
402error:
403 log_errx(1, "Incorrect initiator portal '%s'", portal);
404 return (NULL);
405}
406
407static void
408auth_portal_delete(struct auth_portal *ap)
409{
410 TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next);
411
412 free(ap->ap_initator_portal);
413 free(ap);
414}
415
416bool
417auth_portal_defined(const struct auth_group *ag)
418{
419 if (TAILQ_EMPTY(&ag->ag_portals))
420 return (false);
421 return (true);
422}
423
424const struct auth_portal *
425auth_portal_find(const struct auth_group *ag, const struct sockaddr_storage *ss)
426{
427 const struct auth_portal *ap;
428 const uint8_t *a, *b;
429 int i;
430 uint8_t bmask;
431
432 TAILQ_FOREACH(ap, &ag->ag_portals, ap_next) {
433 if (ap->ap_sa.ss_family != ss->ss_family)
434 continue;
435 if (ss->ss_family == AF_INET) {
436 a = (const uint8_t *)
437 &((const struct sockaddr_in *)ss)->sin_addr;
438 b = (const uint8_t *)
439 &((const struct sockaddr_in *)&ap->ap_sa)->sin_addr;
440 } else {
441 a = (const uint8_t *)
442 &((const struct sockaddr_in6 *)ss)->sin6_addr;
443 b = (const uint8_t *)
444 &((const struct sockaddr_in6 *)&ap->ap_sa)->sin6_addr;
445 }
446 for (i = 0; i < ap->ap_mask / 8; i++) {
447 if (a[i] != b[i])
448 goto next;
449 }
450 if (ap->ap_mask % 8) {
451 bmask = 0xff << (8 - (ap->ap_mask % 8));
452 if ((a[i] & bmask) != (b[i] & bmask))
453 goto next;
454 }
455 return (ap);
456next:
457 ;
458 }
459
460 return (NULL);
461}
462
463int
464auth_portal_check(const struct auth_group *ag, const struct sockaddr_storage *sa)
465{
466
467 if (!auth_portal_defined(ag))
468 return (0);
469
470 if (auth_portal_find(ag, sa) == NULL)
471 return (1);
472
473 return (0);
474}
475
476struct auth_group *
477auth_group_new(struct conf *conf, const char *name)
478{
479 struct auth_group *ag;
480
481 if (name != NULL) {
482 ag = auth_group_find(conf, name);
483 if (ag != NULL) {
484 log_warnx("duplicated auth-group \"%s\"", name);
485 return (NULL);
486 }
487 }
488
489 ag = calloc(1, sizeof(*ag));
490 if (ag == NULL)
491 log_err(1, "calloc");
492 if (name != NULL)
493 ag->ag_name = checked_strdup(name);
494 TAILQ_INIT(&ag->ag_auths);
495 TAILQ_INIT(&ag->ag_names);
496 TAILQ_INIT(&ag->ag_portals);
497 ag->ag_conf = conf;
498 TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next);
499
500 return (ag);
501}
502
503void
504auth_group_delete(struct auth_group *ag)
505{
506 struct auth *auth, *auth_tmp;
507 struct auth_name *auth_name, *auth_name_tmp;
508 struct auth_portal *auth_portal, *auth_portal_tmp;
509
510 TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next);
511
512 TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp)
513 auth_delete(auth);
514 TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp)
515 auth_name_delete(auth_name);
516 TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next,
517 auth_portal_tmp)
518 auth_portal_delete(auth_portal);
519 free(ag->ag_name);
520 free(ag);
521}
522
523struct auth_group *
524auth_group_find(const struct conf *conf, const char *name)
525{
526 struct auth_group *ag;
527
528 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
529 if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0)
530 return (ag);
531 }
532
533 return (NULL);
534}
535
536int
537auth_group_set_type(struct auth_group *ag, const char *str)
538{
539 int type;
540
541 if (strcmp(str, "none") == 0) {
542 type = AG_TYPE_NO_AUTHENTICATION;
543 } else if (strcmp(str, "deny") == 0) {
544 type = AG_TYPE_DENY;
545 } else if (strcmp(str, "chap") == 0) {
546 type = AG_TYPE_CHAP;
547 } else if (strcmp(str, "chap-mutual") == 0) {
548 type = AG_TYPE_CHAP_MUTUAL;
549 } else {
550 if (ag->ag_name != NULL)
551 log_warnx("invalid auth-type \"%s\" for auth-group "
552 "\"%s\"", str, ag->ag_name);
553 else
554 log_warnx("invalid auth-type \"%s\" for target "
555 "\"%s\"", str, ag->ag_target->t_name);
556 return (1);
557 }
558
559 if (ag->ag_type != AG_TYPE_UNKNOWN && ag->ag_type != type) {
560 if (ag->ag_name != NULL) {
561 log_warnx("cannot set auth-type to \"%s\" for "
562 "auth-group \"%s\"; already has a different "
563 "type", str, ag->ag_name);
564 } else {
565 log_warnx("cannot set auth-type to \"%s\" for target "
566 "\"%s\"; already has a different type",
567 str, ag->ag_target->t_name);
568 }
569 return (1);
570 }
571
572 ag->ag_type = type;
573
574 return (0);
575}
576
577static struct portal *
578portal_new(struct portal_group *pg)
579{
580 struct portal *portal;
581
582 portal = calloc(1, sizeof(*portal));
583 if (portal == NULL)
584 log_err(1, "calloc");
585 TAILQ_INIT(&portal->p_targets);
586 portal->p_portal_group = pg;
587 TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next);
588 return (portal);
589}
590
591static void
592portal_delete(struct portal *portal)
593{
594
595 TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next);
596 if (portal->p_ai != NULL)
597 freeaddrinfo(portal->p_ai);
598 free(portal->p_listen);
599 free(portal);
600}
601
602struct portal_group *
603portal_group_new(struct conf *conf, const char *name)
604{
605 struct portal_group *pg;
606
607 pg = portal_group_find(conf, name);
608 if (pg != NULL) {
609 log_warnx("duplicated portal-group \"%s\"", name);
610 return (NULL);
611 }
612
613 pg = calloc(1, sizeof(*pg));
614 if (pg == NULL)
615 log_err(1, "calloc");
616 pg->pg_name = checked_strdup(name);
617 TAILQ_INIT(&pg->pg_portals);
618 TAILQ_INIT(&pg->pg_ports);
619 pg->pg_conf = conf;
620 pg->pg_tag = 0; /* Assigned later in conf_apply(). */
621 TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next);
622
623 return (pg);
624}
625
626void
627portal_group_delete(struct portal_group *pg)
628{
629 struct portal *portal, *tmp;
630 struct port *port, *tport;
631
632 TAILQ_FOREACH_SAFE(port, &pg->pg_ports, p_pgs, tport)
633 port_delete(port);
634 TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next);
635
636 TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp)
637 portal_delete(portal);
638 free(pg->pg_name);
639 free(pg->pg_redirection);
640 free(pg);
641}
642
643struct portal_group *
644portal_group_find(const struct conf *conf, const char *name)
645{
646 struct portal_group *pg;
647
648 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
649 if (strcmp(pg->pg_name, name) == 0)
650 return (pg);
651 }
652
653 return (NULL);
654}
655
656static int
657parse_addr_port(char *arg, const char *def_port, struct addrinfo **ai)
658{
659 struct addrinfo hints;
660 char *str, *addr, *ch;
661 const char *port;
662 int error, colons = 0;
663
664 str = arg = strdup(arg);
665 if (arg[0] == '[') {
666 /*
667 * IPv6 address in square brackets, perhaps with port.
668 */
669 arg++;
670 addr = strsep(&arg, "]");
671 if (arg == NULL)
672 return (1);
673 if (arg[0] == '\0') {
674 port = def_port;
675 } else if (arg[0] == ':') {
676 port = arg + 1;
677 } else {
678 free(str);
679 return (1);
680 }
681 } else {
682 /*
683 * Either IPv6 address without brackets - and without
684 * a port - or IPv4 address. Just count the colons.
685 */
686 for (ch = arg; *ch != '\0'; ch++) {
687 if (*ch == ':')
688 colons++;
689 }
690 if (colons > 1) {
691 addr = arg;
692 port = def_port;
693 } else {
694 addr = strsep(&arg, ":");
695 if (arg == NULL)
696 port = def_port;
697 else
698 port = arg;
699 }
700 }
701
702 memset(&hints, 0, sizeof(hints));
703 hints.ai_family = PF_UNSPEC;
704 hints.ai_socktype = SOCK_STREAM;
705 hints.ai_flags = AI_PASSIVE;
706 error = getaddrinfo(addr, port, &hints, ai);
707 free(str);
708 return ((error != 0) ? 1 : 0);
709}
710
711int
712portal_group_add_listen(struct portal_group *pg, const char *value, bool iser)
713{
714 struct portal *portal;
715
716 portal = portal_new(pg);
717 portal->p_listen = checked_strdup(value);
718 portal->p_iser = iser;
719
720 if (parse_addr_port(portal->p_listen, "3260", &portal->p_ai)) {
721 log_warnx("invalid listen address %s", portal->p_listen);
722 portal_delete(portal);
723 return (1);
724 }
725
726 /*
727 * XXX: getaddrinfo(3) may return multiple addresses; we should turn
728 * those into multiple portals.
729 */
730
731 return (0);
732}
733
734int
735isns_new(struct conf *conf, const char *addr)
736{
737 struct isns *isns;
738
739 isns = calloc(1, sizeof(*isns));
740 if (isns == NULL)
741 log_err(1, "calloc");
742 isns->i_conf = conf;
743 TAILQ_INSERT_TAIL(&conf->conf_isns, isns, i_next);
744 isns->i_addr = checked_strdup(addr);
745
746 if (parse_addr_port(isns->i_addr, "3205", &isns->i_ai)) {
747 log_warnx("invalid iSNS address %s", isns->i_addr);
748 isns_delete(isns);
749 return (1);
750 }
751
752 /*
753 * XXX: getaddrinfo(3) may return multiple addresses; we should turn
754 * those into multiple servers.
755 */
756
757 return (0);
758}
759
760void
761isns_delete(struct isns *isns)
762{
763
764 TAILQ_REMOVE(&isns->i_conf->conf_isns, isns, i_next);
765 free(isns->i_addr);
766 if (isns->i_ai != NULL)
767 freeaddrinfo(isns->i_ai);
768 free(isns);
769}
770
771static int
772isns_do_connect(struct isns *isns)
773{
774 int s;
775
776 s = socket(isns->i_ai->ai_family, isns->i_ai->ai_socktype,
777 isns->i_ai->ai_protocol);
778 if (s < 0) {
779 log_warn("socket(2) failed for %s", isns->i_addr);
780 return (-1);
781 }
782 if (connect(s, isns->i_ai->ai_addr, isns->i_ai->ai_addrlen)) {
783 log_warn("connect(2) failed for %s", isns->i_addr);
784 close(s);
785 return (-1);
786 }
787 return(s);
788}
789
790static int
791isns_do_register(struct isns *isns, int s, const char *hostname)
792{
793 struct conf *conf = isns->i_conf;
794 struct target *target;
795 struct portal *portal;
796 struct portal_group *pg;
797 struct port *port;
798 struct isns_req *req;
799 int res = 0;
800 uint32_t error;
801
802 req = isns_req_create(ISNS_FUNC_DEVATTRREG, ISNS_FLAG_CLIENT);
803 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
804 isns_req_add_delim(req);
805 isns_req_add_str(req, 1, hostname);
806 isns_req_add_32(req, 2, 2); /* 2 -- iSCSI */
807 isns_req_add_32(req, 6, conf->conf_isns_period);
808 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
809 if (pg->pg_unassigned)
810 continue;
811 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
812 isns_req_add_addr(req, 16, portal->p_ai);
813 isns_req_add_port(req, 17, portal->p_ai);
814 }
815 }
816 TAILQ_FOREACH(target, &conf->conf_targets, t_next) {
817 isns_req_add_str(req, 32, target->t_name);
818 isns_req_add_32(req, 33, 1); /* 1 -- Target*/
819 if (target->t_alias != NULL)
820 isns_req_add_str(req, 34, target->t_alias);
821 TAILQ_FOREACH(port, &target->t_ports, p_ts) {
822 if ((pg = port->p_portal_group) == NULL)
823 continue;
824 isns_req_add_32(req, 51, pg->pg_tag);
825 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
826 isns_req_add_addr(req, 49, portal->p_ai);
827 isns_req_add_port(req, 50, portal->p_ai);
828 }
829 }
830 }
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 register 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_check(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_DEVATTRQRY, ISNS_FLAG_CLIENT);
860 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
861 isns_req_add_str(req, 1, hostname);
862 isns_req_add_delim(req);
863 isns_req_add(req, 2, 0, NULL);
864 res = isns_req_send(s, req);
865 if (res < 0) {
866 log_warn("send(2) failed for %s", isns->i_addr);
867 goto quit;
868 }
869 res = isns_req_receive(s, req);
870 if (res < 0) {
871 log_warn("receive(2) failed for %s", isns->i_addr);
872 goto quit;
873 }
874 error = isns_req_get_status(req);
875 if (error != 0) {
876 log_warnx("iSNS check error %d for %s", error, isns->i_addr);
877 res = -1;
878 }
879quit:
880 isns_req_free(req);
881 return (res);
882}
883
884static int
885isns_do_deregister(struct isns *isns, int s, const char *hostname)
886{
887 struct conf *conf = isns->i_conf;
888 struct isns_req *req;
889 int res = 0;
890 uint32_t error;
891
892 req = isns_req_create(ISNS_FUNC_DEVDEREG, ISNS_FLAG_CLIENT);
893 isns_req_add_str(req, 32, TAILQ_FIRST(&conf->conf_targets)->t_name);
894 isns_req_add_delim(req);
895 isns_req_add_str(req, 1, hostname);
896 res = isns_req_send(s, req);
897 if (res < 0) {
898 log_warn("send(2) failed for %s", isns->i_addr);
899 goto quit;
900 }
901 res = isns_req_receive(s, req);
902 if (res < 0) {
903 log_warn("receive(2) failed for %s", isns->i_addr);
904 goto quit;
905 }
906 error = isns_req_get_status(req);
907 if (error != 0) {
908 log_warnx("iSNS deregister error %d for %s", error, isns->i_addr);
909 res = -1;
910 }
911quit:
912 isns_req_free(req);
913 return (res);
914}
915
916void
917isns_register(struct isns *isns, struct isns *oldisns)
918{
919 struct conf *conf = isns->i_conf;
920 int s;
921 char hostname[256];
922
923 if (TAILQ_EMPTY(&conf->conf_targets) ||
924 TAILQ_EMPTY(&conf->conf_portal_groups))
925 return;
926 set_timeout(conf->conf_isns_timeout, false);
927 s = isns_do_connect(isns);
928 if (s < 0) {
929 set_timeout(0, false);
930 return;
931 }
932 gethostname(hostname, sizeof(hostname));
933
934 if (oldisns == NULL || TAILQ_EMPTY(&oldisns->i_conf->conf_targets))
935 oldisns = isns;
936 isns_do_deregister(oldisns, s, hostname);
937 isns_do_register(isns, s, hostname);
938 close(s);
939 set_timeout(0, false);
940}
941
942void
943isns_check(struct isns *isns)
944{
945 struct conf *conf = isns->i_conf;
946 int s, res;
947 char hostname[256];
948
949 if (TAILQ_EMPTY(&conf->conf_targets) ||
950 TAILQ_EMPTY(&conf->conf_portal_groups))
951 return;
952 set_timeout(conf->conf_isns_timeout, false);
953 s = isns_do_connect(isns);
954 if (s < 0) {
955 set_timeout(0, false);
956 return;
957 }
958 gethostname(hostname, sizeof(hostname));
959
960 res = isns_do_check(isns, s, hostname);
961 if (res < 0) {
962 isns_do_deregister(isns, s, hostname);
963 isns_do_register(isns, s, hostname);
964 }
965 close(s);
966 set_timeout(0, false);
967}
968
969void
970isns_deregister(struct isns *isns)
971{
972 struct conf *conf = isns->i_conf;
973 int s;
974 char hostname[256];
975
976 if (TAILQ_EMPTY(&conf->conf_targets) ||
977 TAILQ_EMPTY(&conf->conf_portal_groups))
978 return;
979 set_timeout(conf->conf_isns_timeout, false);
980 s = isns_do_connect(isns);
981 if (s < 0)
982 return;
983 gethostname(hostname, sizeof(hostname));
984
985 isns_do_deregister(isns, s, hostname);
986 close(s);
987 set_timeout(0, false);
988}
989
990int
991portal_group_set_filter(struct portal_group *pg, const char *str)
992{
993 int filter;
994
995 if (strcmp(str, "none") == 0) {
996 filter = PG_FILTER_NONE;
997 } else if (strcmp(str, "portal") == 0) {
998 filter = PG_FILTER_PORTAL;
999 } else if (strcmp(str, "portal-name") == 0) {
1000 filter = PG_FILTER_PORTAL_NAME;
1001 } else if (strcmp(str, "portal-name-auth") == 0) {
1002 filter = PG_FILTER_PORTAL_NAME_AUTH;
1003 } else {
1004 log_warnx("invalid discovery-filter \"%s\" for portal-group "
1005 "\"%s\"; valid values are \"none\", \"portal\", "
1006 "\"portal-name\", and \"portal-name-auth\"",
1007 str, pg->pg_name);
1008 return (1);
1009 }
1010
1011 if (pg->pg_discovery_filter != PG_FILTER_UNKNOWN &&
1012 pg->pg_discovery_filter != filter) {
1013 log_warnx("cannot set discovery-filter to \"%s\" for "
1014 "portal-group \"%s\"; already has a different "
1015 "value", str, pg->pg_name);
1016 return (1);
1017 }
1018
1019 pg->pg_discovery_filter = filter;
1020
1021 return (0);
1022}
1023
1024int
1025portal_group_set_redirection(struct portal_group *pg, const char *addr)
1026{
1027
1028 if (pg->pg_redirection != NULL) {
1029 log_warnx("cannot set redirection to \"%s\" for "
1030 "portal-group \"%s\"; already defined",
1031 addr, pg->pg_name);
1032 return (1);
1033 }
1034
1035 pg->pg_redirection = checked_strdup(addr);
1036
1037 return (0);
1038}
1039
1040static bool
1041valid_hex(const char ch)
1042{
1043 switch (ch) {
1044 case '0':
1045 case '1':
1046 case '2':
1047 case '3':
1048 case '4':
1049 case '5':
1050 case '6':
1051 case '7':
1052 case '8':
1053 case '9':
1054 case 'a':
1055 case 'A':
1056 case 'b':
1057 case 'B':
1058 case 'c':
1059 case 'C':
1060 case 'd':
1061 case 'D':
1062 case 'e':
1063 case 'E':
1064 case 'f':
1065 case 'F':
1066 return (true);
1067 default:
1068 return (false);
1069 }
1070}
1071
1072bool
1073valid_iscsi_name(const char *name)
1074{
1075 int i;
1076
1077 if (strlen(name) >= MAX_NAME_LEN) {
1078 log_warnx("overlong name for target \"%s\"; max length allowed "
1079 "by iSCSI specification is %d characters",
1080 name, MAX_NAME_LEN);
1081 return (false);
1082 }
1083
1084 /*
1085 * In the cases below, we don't return an error, just in case the admin
1086 * was right, and we're wrong.
1087 */
1088 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) {
1089 for (i = strlen("iqn."); name[i] != '\0'; i++) {
1090 /*
1091 * XXX: We should verify UTF-8 normalisation, as defined
1092 * by 3.2.6.2: iSCSI Name Encoding.
1093 */
1094 if (isalnum(name[i]))
1095 continue;
1096 if (name[i] == '-' || name[i] == '.' || name[i] == ':')
1097 continue;
1098 log_warnx("invalid character \"%c\" in target name "
1099 "\"%s\"; allowed characters are letters, digits, "
1100 "'-', '.', and ':'", name[i], name);
1101 break;
1102 }
1103 /*
1104 * XXX: Check more stuff: valid date and a valid reversed domain.
1105 */
1106 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) {
1107 if (strlen(name) != strlen("eui.") + 16)
1108 log_warnx("invalid target name \"%s\"; the \"eui.\" "
1109 "should be followed by exactly 16 hexadecimal "
1110 "digits", name);
1111 for (i = strlen("eui."); name[i] != '\0'; i++) {
1112 if (!valid_hex(name[i])) {
1113 log_warnx("invalid character \"%c\" in target "
1114 "name \"%s\"; allowed characters are 1-9 "
1115 "and A-F", name[i], name);
1116 break;
1117 }
1118 }
1119 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) {
1120 if (strlen(name) > strlen("naa.") + 32)
1121 log_warnx("invalid target name \"%s\"; the \"naa.\" "
1122 "should be followed by at most 32 hexadecimal "
1123 "digits", name);
1124 for (i = strlen("naa."); name[i] != '\0'; i++) {
1125 if (!valid_hex(name[i])) {
1126 log_warnx("invalid character \"%c\" in target "
1127 "name \"%s\"; allowed characters are 1-9 "
1128 "and A-F", name[i], name);
1129 break;
1130 }
1131 }
1132 } else {
1133 log_warnx("invalid target name \"%s\"; should start with "
1134 "either \".iqn\", \"eui.\", or \"naa.\"",
1135 name);
1136 }
1137 return (true);
1138}
1139
1140struct pport *
1141pport_new(struct conf *conf, const char *name, uint32_t ctl_port)
1142{
1143 struct pport *pp;
1144
1145 pp = calloc(1, sizeof(*pp));
1146 if (pp == NULL)
1147 log_err(1, "calloc");
1148 pp->pp_conf = conf;
1149 pp->pp_name = checked_strdup(name);
1150 pp->pp_ctl_port = ctl_port;
1151 TAILQ_INIT(&pp->pp_ports);
1152 TAILQ_INSERT_TAIL(&conf->conf_pports, pp, pp_next);
1153 return (pp);
1154}
1155
1156struct pport *
1157pport_find(const struct conf *conf, const char *name)
1158{
1159 struct pport *pp;
1160
1161 TAILQ_FOREACH(pp, &conf->conf_pports, pp_next) {
1162 if (strcasecmp(pp->pp_name, name) == 0)
1163 return (pp);
1164 }
1165 return (NULL);
1166}
1167
1168struct pport *
1169pport_copy(struct pport *pp, struct conf *conf)
1170{
1171 struct pport *ppnew;
1172
1173 ppnew = pport_new(conf, pp->pp_name, pp->pp_ctl_port);
1174 return (ppnew);
1175}
1176
1177void
1178pport_delete(struct pport *pp)
1179{
1180 struct port *port, *tport;
1181
1182 TAILQ_FOREACH_SAFE(port, &pp->pp_ports, p_ts, tport)
1183 port_delete(port);
1184 TAILQ_REMOVE(&pp->pp_conf->conf_pports, pp, pp_next);
1185 free(pp->pp_name);
1186 free(pp);
1187}
1188
1189struct port *
1190port_new(struct conf *conf, struct target *target, struct portal_group *pg)
1191{
1192 struct port *port;
1193 char *name;
1194
1195 asprintf(&name, "%s-%s", pg->pg_name, target->t_name);
1196 if (port_find(conf, name) != NULL) {
1197 log_warnx("duplicate port \"%s\"", name);
1198 free(name);
1199 return (NULL);
1200 }
1201 port = calloc(1, sizeof(*port));
1202 if (port == NULL)
1203 log_err(1, "calloc");
1204 port->p_conf = conf;
1205 port->p_name = name;
1206 TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1207 TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1208 port->p_target = target;
1209 TAILQ_INSERT_TAIL(&pg->pg_ports, port, p_pgs);
1210 port->p_portal_group = pg;
1211 return (port);
1212}
1213
1214struct port *
1215port_new_pp(struct conf *conf, struct target *target, struct pport *pp)
1216{
1217 struct port *port;
1218 char *name;
1219
1220 asprintf(&name, "%s-%s", pp->pp_name, target->t_name);
1221 if (port_find(conf, name) != NULL) {
1222 log_warnx("duplicate port \"%s\"", name);
1223 free(name);
1224 return (NULL);
1225 }
1226 port = calloc(1, sizeof(*port));
1227 if (port == NULL)
1228 log_err(1, "calloc");
1229 port->p_conf = conf;
1230 port->p_name = name;
1231 TAILQ_INSERT_TAIL(&conf->conf_ports, port, p_next);
1232 TAILQ_INSERT_TAIL(&target->t_ports, port, p_ts);
1233 port->p_target = target;
1234 TAILQ_INSERT_TAIL(&pp->pp_ports, port, p_pps);
1235 port->p_pport = pp;
1236 return (port);
1237}
1238
1239struct port *
1240port_find(const struct conf *conf, const char *name)
1241{
1242 struct port *port;
1243
1244 TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1245 if (strcasecmp(port->p_name, name) == 0)
1246 return (port);
1247 }
1248
1249 return (NULL);
1250}
1251
1252struct port *
1253port_find_in_pg(const struct portal_group *pg, const char *target)
1254{
1255 struct port *port;
1256
1257 TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) {
1258 if (strcasecmp(port->p_target->t_name, target) == 0)
1259 return (port);
1260 }
1261
1262 return (NULL);
1263}
1264
1265void
1266port_delete(struct port *port)
1267{
1268
1269 if (port->p_portal_group)
1270 TAILQ_REMOVE(&port->p_portal_group->pg_ports, port, p_pgs);
1271 if (port->p_pport)
1272 TAILQ_REMOVE(&port->p_pport->pp_ports, port, p_pps);
1273 if (port->p_target)
1274 TAILQ_REMOVE(&port->p_target->t_ports, port, p_ts);
1275 TAILQ_REMOVE(&port->p_conf->conf_ports, port, p_next);
1276 free(port->p_name);
1277 free(port);
1278}
1279
1280struct target *
1281target_new(struct conf *conf, const char *name)
1282{
1283 struct target *targ;
1284 int i, len;
1285
1286 targ = target_find(conf, name);
1287 if (targ != NULL) {
1288 log_warnx("duplicated target \"%s\"", name);
1289 return (NULL);
1290 }
1291 if (valid_iscsi_name(name) == false) {
1292 log_warnx("target name \"%s\" is invalid", name);
1293 return (NULL);
1294 }
1295 targ = calloc(1, sizeof(*targ));
1296 if (targ == NULL)
1297 log_err(1, "calloc");
1298 targ->t_name = checked_strdup(name);
1299
1300 /*
1301 * RFC 3722 requires us to normalize the name to lowercase.
1302 */
1303 len = strlen(name);
1304 for (i = 0; i < len; i++)
1305 targ->t_name[i] = tolower(targ->t_name[i]);
1306
1307 targ->t_conf = conf;
1308 TAILQ_INIT(&targ->t_ports);
1309 TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next);
1310
1311 return (targ);
1312}
1313
1314void
1315target_delete(struct target *targ)
1316{
1317 struct port *port, *tport;
1318
1319 TAILQ_FOREACH_SAFE(port, &targ->t_ports, p_ts, tport)
1320 port_delete(port);
1321 TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next);
1322
1323 free(targ->t_name);
1324 free(targ->t_redirection);
1325 free(targ);
1326}
1327
1328struct target *
1329target_find(struct conf *conf, const char *name)
1330{
1331 struct target *targ;
1332
1333 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1334 if (strcasecmp(targ->t_name, name) == 0)
1335 return (targ);
1336 }
1337
1338 return (NULL);
1339}
1340
1341int
1342target_set_redirection(struct target *target, const char *addr)
1343{
1344
1345 if (target->t_redirection != NULL) {
1346 log_warnx("cannot set redirection to \"%s\" for "
1347 "target \"%s\"; already defined",
1348 addr, target->t_name);
1349 return (1);
1350 }
1351
1352 target->t_redirection = checked_strdup(addr);
1353
1354 return (0);
1355}
1356
1357struct lun *
1358lun_new(struct conf *conf, const char *name)
1359{
1360 struct lun *lun;
1361
1362 lun = lun_find(conf, name);
1363 if (lun != NULL) {
1364 log_warnx("duplicated lun \"%s\"", name);
1365 return (NULL);
1366 }
1367
1368 lun = calloc(1, sizeof(*lun));
1369 if (lun == NULL)
1370 log_err(1, "calloc");
1371 lun->l_conf = conf;
1372 lun->l_name = checked_strdup(name);
1373 TAILQ_INIT(&lun->l_options);
1374 TAILQ_INSERT_TAIL(&conf->conf_luns, lun, l_next);
1375
1376 return (lun);
1377}
1378
1379void
1380lun_delete(struct lun *lun)
1381{
1382 struct target *targ;
1383 struct lun_option *lo, *tmp;
1384 int i;
1385
1386 TAILQ_FOREACH(targ, &lun->l_conf->conf_targets, t_next) {
1387 for (i = 0; i < MAX_LUNS; i++) {
1388 if (targ->t_luns[i] == lun)
1389 targ->t_luns[i] = NULL;
1390 }
1391 }
1392 TAILQ_REMOVE(&lun->l_conf->conf_luns, lun, l_next);
1393
1394 TAILQ_FOREACH_SAFE(lo, &lun->l_options, lo_next, tmp)
1395 lun_option_delete(lo);
1396 free(lun->l_name);
1397 free(lun->l_backend);
1398 free(lun->l_device_id);
1399 free(lun->l_path);
1400 free(lun->l_scsiname);
1401 free(lun->l_serial);
1402 free(lun);
1403}
1404
1405struct lun *
1406lun_find(const struct conf *conf, const char *name)
1407{
1408 struct lun *lun;
1409
1410 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1411 if (strcmp(lun->l_name, name) == 0)
1412 return (lun);
1413 }
1414
1415 return (NULL);
1416}
1417
1418void
1419lun_set_backend(struct lun *lun, const char *value)
1420{
1421 free(lun->l_backend);
1422 lun->l_backend = checked_strdup(value);
1423}
1424
1425void
1426lun_set_blocksize(struct lun *lun, size_t value)
1427{
1428
1429 lun->l_blocksize = value;
1430}
1431
1432void
1433lun_set_device_id(struct lun *lun, const char *value)
1434{
1435 free(lun->l_device_id);
1436 lun->l_device_id = checked_strdup(value);
1437}
1438
1439void
1440lun_set_path(struct lun *lun, const char *value)
1441{
1442 free(lun->l_path);
1443 lun->l_path = checked_strdup(value);
1444}
1445
1446void
1447lun_set_scsiname(struct lun *lun, const char *value)
1448{
1449 free(lun->l_scsiname);
1450 lun->l_scsiname = checked_strdup(value);
1451}
1452
1453void
1454lun_set_serial(struct lun *lun, const char *value)
1455{
1456 free(lun->l_serial);
1457 lun->l_serial = checked_strdup(value);
1458}
1459
1460void
1461lun_set_size(struct lun *lun, size_t value)
1462{
1463
1464 lun->l_size = value;
1465}
1466
1467void
1468lun_set_ctl_lun(struct lun *lun, uint32_t value)
1469{
1470
1471 lun->l_ctl_lun = value;
1472}
1473
1474struct lun_option *
1475lun_option_new(struct lun *lun, const char *name, const char *value)
1476{
1477 struct lun_option *lo;
1478
1479 lo = lun_option_find(lun, name);
1480 if (lo != NULL) {
1481 log_warnx("duplicated lun option \"%s\" for lun \"%s\"",
1482 name, lun->l_name);
1483 return (NULL);
1484 }
1485
1486 lo = calloc(1, sizeof(*lo));
1487 if (lo == NULL)
1488 log_err(1, "calloc");
1489 lo->lo_name = checked_strdup(name);
1490 lo->lo_value = checked_strdup(value);
1491 lo->lo_lun = lun;
1492 TAILQ_INSERT_TAIL(&lun->l_options, lo, lo_next);
1493
1494 return (lo);
1495}
1496
1497void
1498lun_option_delete(struct lun_option *lo)
1499{
1500
1501 TAILQ_REMOVE(&lo->lo_lun->l_options, lo, lo_next);
1502
1503 free(lo->lo_name);
1504 free(lo->lo_value);
1505 free(lo);
1506}
1507
1508struct lun_option *
1509lun_option_find(const struct lun *lun, const char *name)
1510{
1511 struct lun_option *lo;
1512
1513 TAILQ_FOREACH(lo, &lun->l_options, lo_next) {
1514 if (strcmp(lo->lo_name, name) == 0)
1515 return (lo);
1516 }
1517
1518 return (NULL);
1519}
1520
1521void
1522lun_option_set(struct lun_option *lo, const char *value)
1523{
1524
1525 free(lo->lo_value);
1526 lo->lo_value = checked_strdup(value);
1527}
1528
1529static struct connection *
1530connection_new(struct portal *portal, int fd, const char *host,
1531 const struct sockaddr *client_sa)
1532{
1533 struct connection *conn;
1534
1535 conn = calloc(1, sizeof(*conn));
1536 if (conn == NULL)
1537 log_err(1, "calloc");
1538 conn->conn_portal = portal;
1539 conn->conn_socket = fd;
1540 conn->conn_initiator_addr = checked_strdup(host);
1541 memcpy(&conn->conn_initiator_sa, client_sa, client_sa->sa_len);
1542
1543 /*
1544 * Default values, from RFC 3720, section 12.
1545 */
1546 conn->conn_max_data_segment_length = 8192;
1547 conn->conn_max_burst_length = 262144;
1548 conn->conn_immediate_data = true;
1549
1550 return (conn);
1551}
1552
1553#if 0
1554static void
1555conf_print(struct conf *conf)
1556{
1557 struct auth_group *ag;
1558 struct auth *auth;
1559 struct auth_name *auth_name;
1560 struct auth_portal *auth_portal;
1561 struct portal_group *pg;
1562 struct portal *portal;
1563 struct target *targ;
1564 struct lun *lun;
1565 struct lun_option *lo;
1566
1567 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1568 fprintf(stderr, "auth-group %s {\n", ag->ag_name);
1569 TAILQ_FOREACH(auth, &ag->ag_auths, a_next)
1570 fprintf(stderr, "\t chap-mutual %s %s %s %s\n",
1571 auth->a_user, auth->a_secret,
1572 auth->a_mutual_user, auth->a_mutual_secret);
1573 TAILQ_FOREACH(auth_name, &ag->ag_names, an_next)
1574 fprintf(stderr, "\t initiator-name %s\n",
1575 auth_name->an_initator_name);
1576 TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next)
1577 fprintf(stderr, "\t initiator-portal %s\n",
1578 auth_portal->an_initator_portal);
1579 fprintf(stderr, "}\n");
1580 }
1581 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1582 fprintf(stderr, "portal-group %s {\n", pg->pg_name);
1583 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
1584 fprintf(stderr, "\t listen %s\n", portal->p_listen);
1585 fprintf(stderr, "}\n");
1586 }
1587 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1588 fprintf(stderr, "\tlun %s {\n", lun->l_name);
1589 fprintf(stderr, "\t\tpath %s\n", lun->l_path);
1590 TAILQ_FOREACH(lo, &lun->l_options, lo_next)
1591 fprintf(stderr, "\t\toption %s %s\n",
1592 lo->lo_name, lo->lo_value);
1593 fprintf(stderr, "\t}\n");
1594 }
1595 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1596 fprintf(stderr, "target %s {\n", targ->t_name);
1597 if (targ->t_alias != NULL)
1598 fprintf(stderr, "\t alias %s\n", targ->t_alias);
1599 fprintf(stderr, "}\n");
1600 }
1601}
1602#endif
1603
1604static int
1605conf_verify_lun(struct lun *lun)
1606{
1607 const struct lun *lun2;
1608
1609 if (lun->l_backend == NULL)
1610 lun_set_backend(lun, "block");
1611 if (strcmp(lun->l_backend, "block") == 0) {
1612 if (lun->l_path == NULL) {
1613 log_warnx("missing path for lun \"%s\"",
1614 lun->l_name);
1615 return (1);
1616 }
1617 } else if (strcmp(lun->l_backend, "ramdisk") == 0) {
1618 if (lun->l_size == 0) {
1619 log_warnx("missing size for ramdisk-backed lun \"%s\"",
1620 lun->l_name);
1621 return (1);
1622 }
1623 if (lun->l_path != NULL) {
1624 log_warnx("path must not be specified "
1625 "for ramdisk-backed lun \"%s\"",
1626 lun->l_name);
1627 return (1);
1628 }
1629 }
1630 if (lun->l_blocksize == 0) {
1631 lun_set_blocksize(lun, DEFAULT_BLOCKSIZE);
1632 } else if (lun->l_blocksize < 0) {
1633 log_warnx("invalid blocksize for lun \"%s\"; "
1634 "must be larger than 0", lun->l_name);
1635 return (1);
1636 }
1637 if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) {
1638 log_warnx("invalid size for lun \"%s\"; "
1639 "must be multiple of blocksize", lun->l_name);
1640 return (1);
1641 }
1642 TAILQ_FOREACH(lun2, &lun->l_conf->conf_luns, l_next) {
1643 if (lun == lun2)
1644 continue;
1645 if (lun->l_path != NULL && lun2->l_path != NULL &&
1646 strcmp(lun->l_path, lun2->l_path) == 0) {
1647 log_debugx("WARNING: path \"%s\" duplicated "
1648 "between lun \"%s\", and "
1649 "lun \"%s\"", lun->l_path,
1650 lun->l_name, lun2->l_name);
1651 }
1652 }
1653
1654 return (0);
1655}
1656
1657int
1658conf_verify(struct conf *conf)
1659{
1660 struct auth_group *ag;
1661 struct portal_group *pg;
1662 struct port *port;
1663 struct target *targ;
1664 struct lun *lun;
1665 bool found;
1666 int error, i;
1667
1668 if (conf->conf_pidfile_path == NULL)
1669 conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE);
1670
1671 TAILQ_FOREACH(lun, &conf->conf_luns, l_next) {
1672 error = conf_verify_lun(lun);
1673 if (error != 0)
1674 return (error);
1675 }
1676 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1677 if (targ->t_auth_group == NULL) {
1678 targ->t_auth_group = auth_group_find(conf,
1679 "default");
1680 assert(targ->t_auth_group != NULL);
1681 }
1682 if (TAILQ_EMPTY(&targ->t_ports)) {
1683 pg = portal_group_find(conf, "default");
1684 assert(pg != NULL);
1685 port_new(conf, targ, pg);
1686 }
1687 found = false;
1688 for (i = 0; i < MAX_LUNS; i++) {
1689 if (targ->t_luns[i] != NULL)
1690 found = true;
1691 }
1692 if (!found && targ->t_redirection == NULL) {
1693 log_warnx("no LUNs defined for target \"%s\"",
1694 targ->t_name);
1695 }
1696 if (found && targ->t_redirection != NULL) {
1697 log_debugx("target \"%s\" contains luns, "
1698 " but configured for redirection",
1699 targ->t_name);
1700 }
1701 }
1702 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1703 assert(pg->pg_name != NULL);
1704 if (pg->pg_discovery_auth_group == NULL) {
1705 pg->pg_discovery_auth_group =
1706 auth_group_find(conf, "default");
1707 assert(pg->pg_discovery_auth_group != NULL);
1708 }
1709
1710 if (pg->pg_discovery_filter == PG_FILTER_UNKNOWN)
1711 pg->pg_discovery_filter = PG_FILTER_NONE;
1712
1713 if (!TAILQ_EMPTY(&pg->pg_ports)) {
1714 if (pg->pg_redirection != NULL) {
1715 log_debugx("portal-group \"%s\" assigned "
1716 "to target, but configured "
1717 "for redirection",
1718 pg->pg_name);
1719 }
1720 pg->pg_unassigned = false;
1721 } else {
1722 if (strcmp(pg->pg_name, "default") != 0)
1723 log_warnx("portal-group \"%s\" not assigned "
1724 "to any target", pg->pg_name);
1725 pg->pg_unassigned = true;
1726 }
1727 }
1728 TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
1729 if (ag->ag_name == NULL)
1730 assert(ag->ag_target != NULL);
1731 else
1732 assert(ag->ag_target == NULL);
1733
1734 found = false;
1735 TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
1736 if (targ->t_auth_group == ag) {
1737 found = true;
1738 break;
1739 }
1740 }
1741 TAILQ_FOREACH(port, &conf->conf_ports, p_next) {
1742 if (port->p_auth_group == ag) {
1743 found = true;
1744 break;
1745 }
1746 }
1747 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
1748 if (pg->pg_discovery_auth_group == ag) {
1749 found = true;
1750 break;
1751 }
1752 }
1753 if (!found && ag->ag_name != NULL &&
1754 strcmp(ag->ag_name, "default") != 0 &&
1755 strcmp(ag->ag_name, "no-authentication") != 0 &&
1756 strcmp(ag->ag_name, "no-access") != 0) {
1757 log_warnx("auth-group \"%s\" not assigned "
1758 "to any target", ag->ag_name);
1759 }
1760 }
1761
1762 return (0);
1763}
1764
1765static int
1766conf_apply(struct conf *oldconf, struct conf *newconf)
1767{
1768 struct lun *oldlun, *newlun, *tmplun;
1769 struct portal_group *oldpg, *newpg;
1770 struct portal *oldp, *newp;
1771 struct port *oldport, *newport, *tmpport;
1772 struct isns *oldns, *newns;
1773 pid_t otherpid;
1774 int changed, cumulated_error = 0, error, sockbuf;
1775 int one = 1;
1776
1777 if (oldconf->conf_debug != newconf->conf_debug) {
1778 log_debugx("changing debug level to %d", newconf->conf_debug);
1779 log_init(newconf->conf_debug);
1780 }
1781
1782 if (oldconf->conf_pidfh != NULL) {
1783 assert(oldconf->conf_pidfile_path != NULL);
1784 if (newconf->conf_pidfile_path != NULL &&
1785 strcmp(oldconf->conf_pidfile_path,
1786 newconf->conf_pidfile_path) == 0) {
1787 newconf->conf_pidfh = oldconf->conf_pidfh;
1788 oldconf->conf_pidfh = NULL;
1789 } else {
1790 log_debugx("removing pidfile %s",
1791 oldconf->conf_pidfile_path);
1792 pidfile_remove(oldconf->conf_pidfh);
1793 oldconf->conf_pidfh = NULL;
1794 }
1795 }
1796
1797 if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) {
1798 log_debugx("opening pidfile %s", newconf->conf_pidfile_path);
1799 newconf->conf_pidfh =
1800 pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid);
1801 if (newconf->conf_pidfh == NULL) {
1802 if (errno == EEXIST)
1803 log_errx(1, "daemon already running, pid: %jd.",
1804 (intmax_t)otherpid);
1805 log_err(1, "cannot open or create pidfile \"%s\"",
1806 newconf->conf_pidfile_path);
1807 }
1808 }
1809
1810 /*
1811 * Go through the new portal groups, assigning tags or preserving old.
1812 */
1813 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
1814 oldpg = portal_group_find(oldconf, newpg->pg_name);
1815 if (oldpg != NULL)
1816 newpg->pg_tag = oldpg->pg_tag;
1817 else
1818 newpg->pg_tag = ++last_portal_group_tag;
1819 }
1820
1821 /* Deregister on removed iSNS servers. */
1822 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
1823 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
1824 if (strcmp(oldns->i_addr, newns->i_addr) == 0)
1825 break;
1826 }
1827 if (newns == NULL)
1828 isns_deregister(oldns);
1829 }
1830
1831 /*
1832 * XXX: If target or lun removal fails, we should somehow "move"
1833 * the old lun or target into newconf, so that subsequent
1834 * conf_apply() would try to remove them again. That would
1835 * be somewhat hairy, though, and lun deletion failures don't
1836 * really happen, so leave it as it is for now.
1837 */
1838 /*
1839 * First, remove any ports present in the old configuration
1840 * and missing in the new one.
1841 */
1842 TAILQ_FOREACH_SAFE(oldport, &oldconf->conf_ports, p_next, tmpport) {
1843 newport = port_find(newconf, oldport->p_name);
1844 if (newport != NULL)
1845 continue;
1846 log_debugx("removing port \"%s\"", oldport->p_name);
1847 error = kernel_port_remove(oldport);
1848 if (error != 0) {
1849 log_warnx("failed to remove port %s",
1850 oldport->p_name);
1851 /*
1852 * XXX: Uncomment after fixing the root cause.
1853 *
1854 * cumulated_error++;
1855 */
1856 }
1857 }
1858
1859 /*
1860 * Second, remove any LUNs present in the old configuration
1861 * and missing in the new one.
1862 */
1863 TAILQ_FOREACH_SAFE(oldlun, &oldconf->conf_luns, l_next, tmplun) {
1864 newlun = lun_find(newconf, oldlun->l_name);
1865 if (newlun == NULL) {
1866 log_debugx("lun \"%s\", CTL lun %d "
1867 "not found in new configuration; "
1868 "removing", oldlun->l_name, oldlun->l_ctl_lun);
1869 error = kernel_lun_remove(oldlun);
1870 if (error != 0) {
1871 log_warnx("failed to remove lun \"%s\", "
1872 "CTL lun %d",
1873 oldlun->l_name, oldlun->l_ctl_lun);
1874 cumulated_error++;
1875 }
1876 continue;
1877 }
1878
1879 /*
1880 * Also remove the LUNs changed by more than size.
1881 */
1882 changed = 0;
1883 assert(oldlun->l_backend != NULL);
1884 assert(newlun->l_backend != NULL);
1885 if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) {
1886 log_debugx("backend for lun \"%s\", "
1887 "CTL lun %d changed; removing",
1888 oldlun->l_name, oldlun->l_ctl_lun);
1889 changed = 1;
1890 }
1891 if (oldlun->l_blocksize != newlun->l_blocksize) {
1892 log_debugx("blocksize for lun \"%s\", "
1893 "CTL lun %d changed; removing",
1894 oldlun->l_name, oldlun->l_ctl_lun);
1895 changed = 1;
1896 }
1897 if (newlun->l_device_id != NULL &&
1898 (oldlun->l_device_id == NULL ||
1899 strcmp(oldlun->l_device_id, newlun->l_device_id) !=
1900 0)) {
1901 log_debugx("device-id for lun \"%s\", "
1902 "CTL lun %d changed; removing",
1903 oldlun->l_name, oldlun->l_ctl_lun);
1904 changed = 1;
1905 }
1906 if (newlun->l_path != NULL &&
1907 (oldlun->l_path == NULL ||
1908 strcmp(oldlun->l_path, newlun->l_path) != 0)) {
1909 log_debugx("path for lun \"%s\", "
1910 "CTL lun %d, changed; removing",
1911 oldlun->l_name, oldlun->l_ctl_lun);
1912 changed = 1;
1913 }
1914 if (newlun->l_serial != NULL &&
1915 (oldlun->l_serial == NULL ||
1916 strcmp(oldlun->l_serial, newlun->l_serial) != 0)) {
1917 log_debugx("serial for lun \"%s\", "
1918 "CTL lun %d changed; removing",
1919 oldlun->l_name, oldlun->l_ctl_lun);
1920 changed = 1;
1921 }
1922 if (changed) {
1923 error = kernel_lun_remove(oldlun);
1924 if (error != 0) {
1925 log_warnx("failed to remove lun \"%s\", "
1926 "CTL lun %d",
1927 oldlun->l_name, oldlun->l_ctl_lun);
1928 cumulated_error++;
1929 }
1930 lun_delete(oldlun);
1931 continue;
1932 }
1933
1934 lun_set_ctl_lun(newlun, oldlun->l_ctl_lun);
1935 }
1936
1937 TAILQ_FOREACH_SAFE(newlun, &newconf->conf_luns, l_next, tmplun) {
1938 oldlun = lun_find(oldconf, newlun->l_name);
1939 if (oldlun != NULL) {
1940 if (newlun->l_size != oldlun->l_size ||
1941 newlun->l_size == 0) {
1942 log_debugx("resizing lun \"%s\", CTL lun %d",
1943 newlun->l_name, newlun->l_ctl_lun);
1944 error = kernel_lun_resize(newlun);
1945 if (error != 0) {
1946 log_warnx("failed to "
1947 "resize lun \"%s\", CTL lun %d",
1948 newlun->l_name,
1949 newlun->l_ctl_lun);
1950 cumulated_error++;
1951 }
1952 }
1953 continue;
1954 }
1955 log_debugx("adding lun \"%s\"", newlun->l_name);
1956 error = kernel_lun_add(newlun);
1957 if (error != 0) {
1958 log_warnx("failed to add lun \"%s\"", newlun->l_name);
1959 lun_delete(newlun);
1960 cumulated_error++;
1961 }
1962 }
1963
1964 /*
1965 * Now add new ports or modify existing ones.
1966 */
1967 TAILQ_FOREACH(newport, &newconf->conf_ports, p_next) {
1968 oldport = port_find(oldconf, newport->p_name);
1969
1970 if (oldport == NULL) {
1971 log_debugx("adding port \"%s\"", newport->p_name);
1972 error = kernel_port_add(newport);
1973 } else {
1974 log_debugx("updating port \"%s\"", newport->p_name);
1975 newport->p_ctl_port = oldport->p_ctl_port;
1976 error = kernel_port_update(newport);
1977 }
1978 if (error != 0) {
1979 log_warnx("failed to %s port %s",
1980 (oldport == NULL) ? "add" : "update",
1981 newport->p_name);
1982 /*
1983 * XXX: Uncomment after fixing the root cause.
1984 *
1985 * cumulated_error++;
1986 */
1987 }
1988 }
1989
1990 /*
1991 * Go through the new portals, opening the sockets as neccessary.
1992 */
1993 TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
1994 if (newpg->pg_unassigned) {
1995 log_debugx("not listening on portal-group \"%s\", "
1996 "not assigned to any target",
1997 newpg->pg_name);
1998 continue;
1999 }
2000 TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) {
2001 /*
2002 * Try to find already open portal and reuse
2003 * the listening socket. We don't care about
2004 * what portal or portal group that was, what
2005 * matters is the listening address.
2006 */
2007 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups,
2008 pg_next) {
2009 TAILQ_FOREACH(oldp, &oldpg->pg_portals,
2010 p_next) {
2011 if (strcmp(newp->p_listen,
2012 oldp->p_listen) == 0 &&
2013 oldp->p_socket > 0) {
2014 newp->p_socket =
2015 oldp->p_socket;
2016 oldp->p_socket = 0;
2017 break;
2018 }
2019 }
2020 }
2021 if (newp->p_socket > 0) {
2022 /*
2023 * We're done with this portal.
2024 */
2025 continue;
2026 }
2027
2028#ifdef ICL_KERNEL_PROXY
2029 if (proxy_mode) {
2030 newpg->pg_conf->conf_portal_id++;
2031 newp->p_id = newpg->pg_conf->conf_portal_id;
2032 log_debugx("listening on %s, portal-group "
2033 "\"%s\", portal id %d, using ICL proxy",
2034 newp->p_listen, newpg->pg_name, newp->p_id);
2035 kernel_listen(newp->p_ai, newp->p_iser,
2036 newp->p_id);
2037 continue;
2038 }
2039#endif
2040 assert(proxy_mode == false);
2041 assert(newp->p_iser == false);
2042
2043 log_debugx("listening on %s, portal-group \"%s\"",
2044 newp->p_listen, newpg->pg_name);
2045 newp->p_socket = socket(newp->p_ai->ai_family,
2046 newp->p_ai->ai_socktype,
2047 newp->p_ai->ai_protocol);
2048 if (newp->p_socket < 0) {
2049 log_warn("socket(2) failed for %s",
2050 newp->p_listen);
2051 cumulated_error++;
2052 continue;
2053 }
2054 sockbuf = SOCKBUF_SIZE;
2055 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_RCVBUF,
2056 &sockbuf, sizeof(sockbuf)) == -1)
2057 log_warn("setsockopt(SO_RCVBUF) failed "
2058 "for %s", newp->p_listen);
2059 sockbuf = SOCKBUF_SIZE;
2060 if (setsockopt(newp->p_socket, SOL_SOCKET, SO_SNDBUF,
2061 &sockbuf, sizeof(sockbuf)) == -1)
2062 log_warn("setsockopt(SO_SNDBUF) failed "
2063 "for %s", newp->p_listen);
2064 error = setsockopt(newp->p_socket, SOL_SOCKET,
2065 SO_REUSEADDR, &one, sizeof(one));
2066 if (error != 0) {
2067 log_warn("setsockopt(SO_REUSEADDR) failed "
2068 "for %s", newp->p_listen);
2069 close(newp->p_socket);
2070 newp->p_socket = 0;
2071 cumulated_error++;
2072 continue;
2073 }
2074 error = bind(newp->p_socket, newp->p_ai->ai_addr,
2075 newp->p_ai->ai_addrlen);
2076 if (error != 0) {
2077 log_warn("bind(2) failed for %s",
2078 newp->p_listen);
2079 close(newp->p_socket);
2080 newp->p_socket = 0;
2081 cumulated_error++;
2082 continue;
2083 }
2084 error = listen(newp->p_socket, -1);
2085 if (error != 0) {
2086 log_warn("listen(2) failed for %s",
2087 newp->p_listen);
2088 close(newp->p_socket);
2089 newp->p_socket = 0;
2090 cumulated_error++;
2091 continue;
2092 }
2093 }
2094 }
2095
2096 /*
2097 * Go through the no longer used sockets, closing them.
2098 */
2099 TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) {
2100 TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) {
2101 if (oldp->p_socket <= 0)
2102 continue;
2103 log_debugx("closing socket for %s, portal-group \"%s\"",
2104 oldp->p_listen, oldpg->pg_name);
2105 close(oldp->p_socket);
2106 oldp->p_socket = 0;
2107 }
2108 }
2109
2110 /* (Re-)Register on remaining/new iSNS servers. */
2111 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next) {
2112 TAILQ_FOREACH(oldns, &oldconf->conf_isns, i_next) {
2113 if (strcmp(oldns->i_addr, newns->i_addr) == 0)
2114 break;
2115 }
2116 isns_register(newns, oldns);
2117 }
2118
2119 /* Schedule iSNS update */
2120 if (!TAILQ_EMPTY(&newconf->conf_isns))
2121 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2122
2123 return (cumulated_error);
2124}
2125
2126bool
2127timed_out(void)
2128{
2129
2130 return (sigalrm_received);
2131}
2132
2133static void
2134sigalrm_handler_fatal(int dummy __unused)
2135{
2136 /*
2137 * It would be easiest to just log an error and exit. We can't
2138 * do this, though, because log_errx() is not signal safe, since
2139 * it calls syslog(3). Instead, set a flag checked by pdu_send()
2140 * and pdu_receive(), to call log_errx() there. Should they fail
2141 * to notice, we'll exit here one second later.
2142 */
2143 if (sigalrm_received) {
2144 /*
2145 * Oh well. Just give up and quit.
2146 */
2147 _exit(2);
2148 }
2149
2150 sigalrm_received = true;
2151}
2152
2153static void
2154sigalrm_handler(int dummy __unused)
2155{
2156
2157 sigalrm_received = true;
2158}
2159
2160void
2161set_timeout(int timeout, int fatal)
2162{
2163 struct sigaction sa;
2164 struct itimerval itv;
2165 int error;
2166
2167 if (timeout <= 0) {
2168 log_debugx("session timeout disabled");
2169 bzero(&itv, sizeof(itv));
2170 error = setitimer(ITIMER_REAL, &itv, NULL);
2171 if (error != 0)
2172 log_err(1, "setitimer");
2173 sigalrm_received = false;
2174 return;
2175 }
2176
2177 sigalrm_received = false;
2178 bzero(&sa, sizeof(sa));
2179 if (fatal)
2180 sa.sa_handler = sigalrm_handler_fatal;
2181 else
2182 sa.sa_handler = sigalrm_handler;
2183 sigfillset(&sa.sa_mask);
2184 error = sigaction(SIGALRM, &sa, NULL);
2185 if (error != 0)
2186 log_err(1, "sigaction");
2187
2188 /*
2189 * First SIGALRM will arive after conf_timeout seconds.
2190 * If we do nothing, another one will arrive a second later.
2191 */
2192 log_debugx("setting session timeout to %d seconds", timeout);
2193 bzero(&itv, sizeof(itv));
2194 itv.it_interval.tv_sec = 1;
2195 itv.it_value.tv_sec = timeout;
2196 error = setitimer(ITIMER_REAL, &itv, NULL);
2197 if (error != 0)
2198 log_err(1, "setitimer");
2199}
2200
2201static int
2202wait_for_children(bool block)
2203{
2204 pid_t pid;
2205 int status;
2206 int num = 0;
2207
2208 for (;;) {
2209 /*
2210 * If "block" is true, wait for at least one process.
2211 */
2212 if (block && num == 0)
2213 pid = wait4(-1, &status, 0, NULL);
2214 else
2215 pid = wait4(-1, &status, WNOHANG, NULL);
2216 if (pid <= 0)
2217 break;
2218 if (WIFSIGNALED(status)) {
2219 log_warnx("child process %d terminated with signal %d",
2220 pid, WTERMSIG(status));
2221 } else if (WEXITSTATUS(status) != 0) {
2222 log_warnx("child process %d terminated with exit status %d",
2223 pid, WEXITSTATUS(status));
2224 } else {
2225 log_debugx("child process %d terminated gracefully", pid);
2226 }
2227 num++;
2228 }
2229
2230 return (num);
2231}
2232
2233static void
2234handle_connection(struct portal *portal, int fd,
2235 const struct sockaddr *client_sa, bool dont_fork)
2236{
2237 struct connection *conn;
2238 int error;
2239 pid_t pid;
2240 char host[NI_MAXHOST + 1];
2241 struct conf *conf;
2242
2243 conf = portal->p_portal_group->pg_conf;
2244
2245 if (dont_fork) {
2246 log_debugx("incoming connection; not forking due to -d flag");
2247 } else {
2248 nchildren -= wait_for_children(false);
2249 assert(nchildren >= 0);
2250
2251 while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) {
2252 log_debugx("maxproc limit of %d child processes hit; "
2253 "waiting for child process to exit", conf->conf_maxproc);
2254 nchildren -= wait_for_children(true);
2255 assert(nchildren >= 0);
2256 }
2257 log_debugx("incoming connection; forking child process #%d",
2258 nchildren);
2259 nchildren++;
2260 pid = fork();
2261 if (pid < 0)
2262 log_err(1, "fork");
2263 if (pid > 0) {
2264 close(fd);
2265 return;
2266 }
2267 }
2268 pidfile_close(conf->conf_pidfh);
2269
2270 error = getnameinfo(client_sa, client_sa->sa_len,
2271 host, sizeof(host), NULL, 0, NI_NUMERICHOST);
2272 if (error != 0)
2273 log_errx(1, "getnameinfo: %s", gai_strerror(error));
2274
2275 log_debugx("accepted connection from %s; portal group \"%s\"",
2276 host, portal->p_portal_group->pg_name);
2277 log_set_peer_addr(host);
2278 setproctitle("%s", host);
2279
2280 conn = connection_new(portal, fd, host, client_sa);
2281 set_timeout(conf->conf_timeout, true);
2282 kernel_capsicate();
2283 login(conn);
2284 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
2285 kernel_handoff(conn);
2286 log_debugx("connection handed off to the kernel");
2287 } else {
2288 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
2289 discovery(conn);
2290 }
2291 log_debugx("nothing more to do; exiting");
2292 exit(0);
2293}
2294
2295static int
2296fd_add(int fd, fd_set *fdset, int nfds)
2297{
2298
2299 /*
2300 * Skip sockets which we failed to bind.
2301 */
2302 if (fd <= 0)
2303 return (nfds);
2304
2305 FD_SET(fd, fdset);
2306 if (fd > nfds)
2307 nfds = fd;
2308 return (nfds);
2309}
2310
2311static void
2312main_loop(struct conf *conf, bool dont_fork)
2313{
2314 struct portal_group *pg;
2315 struct portal *portal;
2316 struct sockaddr_storage client_sa;
2317 socklen_t client_salen;
2318#ifdef ICL_KERNEL_PROXY
2319 int connection_id;
2320 int portal_id;
2321#endif
2322 fd_set fdset;
2323 int error, nfds, client_fd;
2324
2325 pidfile_write(conf->conf_pidfh);
2326
2327 for (;;) {
2328 if (sighup_received || sigterm_received || timed_out())
2329 return;
2330
2331#ifdef ICL_KERNEL_PROXY
2332 if (proxy_mode) {
2333 client_salen = sizeof(client_sa);
2334 kernel_accept(&connection_id, &portal_id,
2335 (struct sockaddr *)&client_sa, &client_salen);
2336 assert(client_salen >= client_sa.ss_len);
2337
2338 log_debugx("incoming connection, id %d, portal id %d",
2339 connection_id, portal_id);
2340 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2341 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2342 if (portal->p_id == portal_id) {
2343 goto found;
2344 }
2345 }
2346 }
2347
2348 log_errx(1, "kernel returned invalid portal_id %d",
2349 portal_id);
2350
2351found:
2352 handle_connection(portal, connection_id,
2353 (struct sockaddr *)&client_sa, dont_fork);
2354 } else {
2355#endif
2356 assert(proxy_mode == false);
2357
2358 FD_ZERO(&fdset);
2359 nfds = 0;
2360 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2361 TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
2362 nfds = fd_add(portal->p_socket, &fdset, nfds);
2363 }
2364 error = select(nfds + 1, &fdset, NULL, NULL, NULL);
2365 if (error <= 0) {
2366 if (errno == EINTR)
2367 return;
2368 log_err(1, "select");
2369 }
2370 TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
2371 TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
2372 if (!FD_ISSET(portal->p_socket, &fdset))
2373 continue;
2374 client_salen = sizeof(client_sa);
2375 client_fd = accept(portal->p_socket,
2376 (struct sockaddr *)&client_sa,
2377 &client_salen);
2378 if (client_fd < 0)
2379 log_err(1, "accept");
2380 assert(client_salen >= client_sa.ss_len);
2381
2382 handle_connection(portal, client_fd,
2383 (struct sockaddr *)&client_sa,
2384 dont_fork);
2385 break;
2386 }
2387 }
2388#ifdef ICL_KERNEL_PROXY
2389 }
2390#endif
2391 }
2392}
2393
2394static void
2395sighup_handler(int dummy __unused)
2396{
2397
2398 sighup_received = true;
2399}
2400
2401static void
2402sigterm_handler(int dummy __unused)
2403{
2404
2405 sigterm_received = true;
2406}
2407
2408static void
2409sigchld_handler(int dummy __unused)
2410{
2411
2412 /*
2413 * The only purpose of this handler is to make SIGCHLD
2414 * interrupt the ISCSIDWAIT ioctl(2), so we can call
2415 * wait_for_children().
2416 */
2417}
2418
2419static void
2420register_signals(void)
2421{
2422 struct sigaction sa;
2423 int error;
2424
2425 bzero(&sa, sizeof(sa));
2426 sa.sa_handler = sighup_handler;
2427 sigfillset(&sa.sa_mask);
2428 error = sigaction(SIGHUP, &sa, NULL);
2429 if (error != 0)
2430 log_err(1, "sigaction");
2431
2432 sa.sa_handler = sigterm_handler;
2433 error = sigaction(SIGTERM, &sa, NULL);
2434 if (error != 0)
2435 log_err(1, "sigaction");
2436
2437 sa.sa_handler = sigterm_handler;
2438 error = sigaction(SIGINT, &sa, NULL);
2439 if (error != 0)
2440 log_err(1, "sigaction");
2441
2442 sa.sa_handler = sigchld_handler;
2443 error = sigaction(SIGCHLD, &sa, NULL);
2444 if (error != 0)
2445 log_err(1, "sigaction");
2446}
2447
2448int
2449main(int argc, char **argv)
2450{
2451 struct conf *oldconf, *newconf, *tmpconf;
2452 struct isns *newns;
2453 const char *config_path = DEFAULT_CONFIG_PATH;
2454 int debug = 0, ch, error;
2455 bool dont_daemonize = false;
2456
2457 while ((ch = getopt(argc, argv, "df:R")) != -1) {
2458 switch (ch) {
2459 case 'd':
2460 dont_daemonize = true;
2461 debug++;
2462 break;
2463 case 'f':
2464 config_path = optarg;
2465 break;
2466 case 'R':
2467#ifndef ICL_KERNEL_PROXY
2468 log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY "
2469 "does not support iSER protocol");
2470#endif
2471 proxy_mode = true;
2472 break;
2473 case '?':
2474 default:
2475 usage();
2476 }
2477 }
2478 argc -= optind;
2479 if (argc != 0)
2480 usage();
2481
2482 log_init(debug);
2483 kernel_init();
2484
2485 oldconf = conf_new_from_kernel();
2486 newconf = conf_new_from_file(config_path, oldconf);
2487 if (newconf == NULL)
2488 log_errx(1, "configuration error; exiting");
2489 if (debug > 0) {
2490 oldconf->conf_debug = debug;
2491 newconf->conf_debug = debug;
2492 }
2493
2494 error = conf_apply(oldconf, newconf);
2495 if (error != 0)
2496 log_errx(1, "failed to apply configuration; exiting");
2497
2498 conf_delete(oldconf);
2499 oldconf = NULL;
2500
2501 register_signals();
2502
2503 if (dont_daemonize == false) {
2504 log_debugx("daemonizing");
2505 if (daemon(0, 0) == -1) {
2506 log_warn("cannot daemonize");
2507 pidfile_remove(newconf->conf_pidfh);
2508 exit(1);
2509 }
2510 }
2511
2512 /* Schedule iSNS update */
2513 if (!TAILQ_EMPTY(&newconf->conf_isns))
2514 set_timeout((newconf->conf_isns_period + 2) / 3, false);
2515
2516 for (;;) {
2517 main_loop(newconf, dont_daemonize);
2518 if (sighup_received) {
2519 sighup_received = false;
2520 log_debugx("received SIGHUP, reloading configuration");
2521 tmpconf = conf_new_from_file(config_path, newconf);
2522 if (tmpconf == NULL) {
2523 log_warnx("configuration error, "
2524 "continuing with old configuration");
2525 } else {
2526 if (debug > 0)
2527 tmpconf->conf_debug = debug;
2528 oldconf = newconf;
2529 newconf = tmpconf;
2530 error = conf_apply(oldconf, newconf);
2531 if (error != 0)
2532 log_warnx("failed to reload "
2533 "configuration");
2534 conf_delete(oldconf);
2535 oldconf = NULL;
2536 }
2537 } else if (sigterm_received) {
2538 log_debugx("exiting on signal; "
2539 "reloading empty configuration");
2540
2541 log_debugx("removing CTL iSCSI ports "
2542 "and terminating all connections");
2543
2544 oldconf = newconf;
2545 newconf = conf_new();
2546 if (debug > 0)
2547 newconf->conf_debug = debug;
2548 error = conf_apply(oldconf, newconf);
2549 if (error != 0)
2550 log_warnx("failed to apply configuration");
2551 conf_delete(oldconf);
2552 oldconf = NULL;
2553
2554 log_warnx("exiting on signal");
2555 exit(0);
2556 } else {
2557 nchildren -= wait_for_children(false);
2558 assert(nchildren >= 0);
2559 if (timed_out()) {
2560 set_timeout(0, false);
2561 TAILQ_FOREACH(newns, &newconf->conf_isns, i_next)
2562 isns_check(newns);
2563 /* Schedule iSNS update */
2564 if (!TAILQ_EMPTY(&newconf->conf_isns)) {
2565 set_timeout((newconf->conf_isns_period
2566 + 2) / 3,
2567 false);
2568 }
2569 }
2570 }
2571 }
2572 /* NOTREACHED */
2573}