1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/epoll.h>
30 #include "load-fragment.h"
31 #include "load-dropin.h"
34 #include "mount-setup.h"
35 #include "unit-name.h"
37 #include "dbus-mount.h"
39 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
40 [MOUNT_DEAD] = UNIT_INACTIVE,
41 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
42 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
43 [MOUNT_MOUNTED] = UNIT_ACTIVE,
44 [MOUNT_REMOUNTING] = UNIT_ACTIVE_RELOADING,
45 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
46 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
47 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
48 [MOUNT_REMOUNTING_SIGTERM] = UNIT_ACTIVE_RELOADING,
49 [MOUNT_REMOUNTING_SIGKILL] = UNIT_ACTIVE_RELOADING,
50 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
51 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
52 [MOUNT_MAINTAINANCE] = UNIT_INACTIVE,
55 static void mount_init(Unit *u) {
59 assert(u->meta.load_state == UNIT_STUB);
61 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
62 exec_context_init(&m->exec_context);
64 /* We need to make sure that /bin/mount is always called in
65 * the same process group as us, so that the autofs kernel
66 * side doesn't send us another mount request while we are
67 * already trying to comply its last one. */
68 m->exec_context.no_setsid = true;
70 m->timer_watch.type = WATCH_INVALID;
72 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
75 static void mount_unwatch_control_pid(Mount *m) {
78 if (m->control_pid <= 0)
81 unit_unwatch_pid(UNIT(m), m->control_pid);
85 static void mount_parameters_done(MountParameters *p) {
92 p->what = p->options = p->fstype = NULL;
95 static void mount_done(Unit *u) {
103 mount_parameters_done(&m->parameters_etc_fstab);
104 mount_parameters_done(&m->parameters_proc_self_mountinfo);
105 mount_parameters_done(&m->parameters_fragment);
107 exec_context_done(&m->exec_context);
108 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
109 m->control_command = NULL;
111 mount_unwatch_control_pid(m);
113 unit_unwatch_timer(u, &m->timer_watch);
116 static int mount_add_mount_links(Mount *m) {
122 /* Adds in links to other mount points that might lie below or
123 * above us in the hierarchy */
125 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
126 Mount *n = (Mount*) other;
131 if (n->meta.load_state != UNIT_LOADED)
134 if (path_startswith(m->where, n->where)) {
136 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
139 if (n->from_etc_fstab || n->from_fragment)
140 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
143 } else if (path_startswith(n->where, m->where)) {
145 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
148 if (m->from_etc_fstab || m->from_fragment)
149 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
157 static int mount_add_swap_links(Mount *m) {
163 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
164 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
170 static int mount_add_automount_links(Mount *m) {
176 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
177 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
183 static int mount_add_socket_links(Mount *m) {
189 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
190 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
196 static char* mount_test_option(const char *haystack, const char *needle) {
201 /* Like glibc's hasmntopt(), but works on a string, not a
208 me.mnt_opts = (char*) haystack;
210 return hasmntopt(&me, needle);
213 static int mount_add_target_links(Mount *m) {
218 bool noauto, handle, automount, user;
222 if (m->from_fragment)
223 p = &m->parameters_fragment;
224 else if (m->from_etc_fstab)
225 p = &m->parameters_etc_fstab;
229 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
230 user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
231 handle = !!mount_test_option(p->options, "comment=systemd.mount");
232 automount = !!mount_test_option(p->options, "comment=systemd.automount");
234 if (mount_test_option(p->options, "_netdev") ||
235 fstype_is_network(p->fstype))
236 target = SPECIAL_REMOTE_FS_TARGET;
238 target = SPECIAL_LOCAL_FS_TARGET;
240 if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0)
243 if (automount && m->meta.manager->running_as != MANAGER_SESSION) {
246 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
249 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(am), true)) < 0)
252 return unit_add_dependency(UNIT(am), UNIT_BEFORE, tu, true);
256 if (!noauto && handle)
257 if (user || m->meta.manager->running_as != MANAGER_SESSION)
258 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
261 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
265 static int mount_verify(Mount *m) {
270 if (UNIT(m)->meta.load_state != UNIT_LOADED)
273 if (!(e = unit_name_from_path(m->where, ".mount")))
276 b = unit_has_name(UNIT(m), e);
280 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
284 if (m->meta.fragment_path && !m->parameters_fragment.what) {
285 log_error("%s's What setting is missing. Refusing.", UNIT(m)->meta.id);
292 static int mount_load(Unit *u) {
297 assert(u->meta.load_state == UNIT_STUB);
299 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
302 /* This is a new unit? Then let's add in some extras */
303 if (u->meta.load_state == UNIT_LOADED) {
304 const char *what = NULL;
306 if (m->meta.fragment_path)
307 m->from_fragment = true;
310 if (!(m->where = unit_name_to_path(u->meta.id)))
313 path_kill_slashes(m->where);
315 if (!m->meta.description)
316 if ((r = unit_set_description(u, m->where)) < 0)
319 if (m->from_fragment && m->parameters_fragment.what)
320 what = m->parameters_fragment.what;
321 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
322 what = m->parameters_etc_fstab.what;
323 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
324 what = m->parameters_proc_self_mountinfo.what;
327 if ((r = unit_add_node_link(u, what,
328 (u->meta.manager->running_as == MANAGER_INIT ||
329 u->meta.manager->running_as == MANAGER_SYSTEM))) < 0)
332 if ((r = mount_add_mount_links(m)) < 0)
335 if ((r = mount_add_socket_links(m)) < 0)
338 if ((r = mount_add_swap_links(m)) < 0)
341 if ((r = mount_add_automount_links(m)) < 0)
344 if ((r = mount_add_target_links(m)) < 0)
347 if ((r = unit_add_default_cgroup(u)) < 0)
351 return mount_verify(m);
354 static int mount_notify_automount(Mount *m, int status) {
360 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
361 return r == -ENOENT ? 0 : r;
363 return automount_send_ready(AUTOMOUNT(p), status);
366 static void mount_set_state(Mount *m, MountState state) {
367 MountState old_state;
370 old_state = m->state;
373 if (state != MOUNT_MOUNTING &&
374 state != MOUNT_MOUNTING_DONE &&
375 state != MOUNT_REMOUNTING &&
376 state != MOUNT_UNMOUNTING &&
377 state != MOUNT_MOUNTING_SIGTERM &&
378 state != MOUNT_MOUNTING_SIGKILL &&
379 state != MOUNT_UNMOUNTING_SIGTERM &&
380 state != MOUNT_UNMOUNTING_SIGKILL &&
381 state != MOUNT_REMOUNTING_SIGTERM &&
382 state != MOUNT_REMOUNTING_SIGKILL) {
383 unit_unwatch_timer(UNIT(m), &m->timer_watch);
384 mount_unwatch_control_pid(m);
385 m->control_command = NULL;
386 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
389 if (state == MOUNT_MOUNTED ||
390 state == MOUNT_REMOUNTING)
391 mount_notify_automount(m, 0);
392 else if (state == MOUNT_DEAD ||
393 state == MOUNT_UNMOUNTING ||
394 state == MOUNT_MOUNTING_SIGTERM ||
395 state == MOUNT_MOUNTING_SIGKILL ||
396 state == MOUNT_REMOUNTING_SIGTERM ||
397 state == MOUNT_REMOUNTING_SIGKILL ||
398 state == MOUNT_UNMOUNTING_SIGTERM ||
399 state == MOUNT_UNMOUNTING_SIGKILL ||
400 state == MOUNT_MAINTAINANCE)
401 mount_notify_automount(m, -ENODEV);
403 if (state != old_state)
404 log_debug("%s changed %s -> %s",
406 mount_state_to_string(old_state),
407 mount_state_to_string(state));
409 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
412 static int mount_coldplug(Unit *u) {
414 MountState new_state = MOUNT_DEAD;
418 assert(m->state == MOUNT_DEAD);
420 if (m->deserialized_state != m->state)
421 new_state = m->deserialized_state;
422 else if (m->from_proc_self_mountinfo)
423 new_state = MOUNT_MOUNTED;
425 if (new_state != m->state) {
427 if (new_state == MOUNT_MOUNTING ||
428 new_state == MOUNT_MOUNTING_DONE ||
429 new_state == MOUNT_REMOUNTING ||
430 new_state == MOUNT_UNMOUNTING ||
431 new_state == MOUNT_MOUNTING_SIGTERM ||
432 new_state == MOUNT_MOUNTING_SIGKILL ||
433 new_state == MOUNT_UNMOUNTING_SIGTERM ||
434 new_state == MOUNT_UNMOUNTING_SIGKILL ||
435 new_state == MOUNT_REMOUNTING_SIGTERM ||
436 new_state == MOUNT_REMOUNTING_SIGKILL) {
438 if (m->control_pid <= 0)
441 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
444 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
448 mount_set_state(m, new_state);
454 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
461 if (m->from_proc_self_mountinfo)
462 p = &m->parameters_proc_self_mountinfo;
463 else if (m->from_fragment)
464 p = &m->parameters_fragment;
466 p = &m->parameters_etc_fstab;
469 "%sMount State: %s\n"
472 "%sFile System Type: %s\n"
474 "%sFrom /etc/fstab: %s\n"
475 "%sFrom /proc/self/mountinfo: %s\n"
476 "%sFrom fragment: %s\n"
478 prefix, mount_state_to_string(m->state),
480 prefix, strna(p->what),
481 prefix, strna(p->fstype),
482 prefix, strna(p->options),
483 prefix, yes_no(m->from_etc_fstab),
484 prefix, yes_no(m->from_proc_self_mountinfo),
485 prefix, yes_no(m->from_fragment),
486 prefix, kill_mode_to_string(m->kill_mode));
488 if (m->control_pid > 0)
490 "%sControl PID: %llu\n",
491 prefix, (unsigned long long) m->control_pid);
493 exec_context_dump(&m->exec_context, f, prefix);
496 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
504 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
507 if ((r = exec_spawn(c,
511 m->meta.manager->environment,
514 UNIT(m)->meta.manager->confirm_spawn,
515 UNIT(m)->meta.cgroup_bondings,
519 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
520 /* FIXME: we need to do something here */
528 unit_unwatch_timer(UNIT(m), &m->timer_watch);
533 static void mount_enter_dead(Mount *m, bool success) {
539 mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
542 static void mount_enter_mounted(Mount *m, bool success) {
548 mount_set_state(m, MOUNT_MOUNTED);
551 static void mount_enter_signal(Mount *m, MountState state, bool success) {
560 if (m->kill_mode != KILL_NONE) {
561 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
562 state == MOUNT_UNMOUNTING_SIGTERM ||
563 state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
565 if (m->kill_mode == KILL_CONTROL_GROUP) {
567 if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
568 if (r != -EAGAIN && r != -ESRCH)
574 if (!sent && m->control_pid > 0)
575 if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
582 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
585 mount_set_state(m, state);
586 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
587 mount_enter_mounted(m, true);
589 mount_enter_dead(m, true);
594 log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
596 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
597 mount_enter_mounted(m, false);
599 mount_enter_dead(m, false);
602 static void mount_enter_unmounting(Mount *m, bool success) {
610 m->control_command_id = MOUNT_EXEC_UNMOUNT;
611 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
613 if ((r = exec_command_set(
620 mount_unwatch_control_pid(m);
622 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
625 mount_set_state(m, MOUNT_UNMOUNTING);
630 log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
631 mount_enter_mounted(m, false);
634 static void mount_enter_mounting(Mount *m) {
639 m->control_command_id = MOUNT_EXEC_MOUNT;
640 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
642 if (m->from_fragment)
643 r = exec_command_set(
646 m->parameters_fragment.what,
648 "-t", m->parameters_fragment.fstype,
649 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
651 else if (m->from_etc_fstab)
652 r = exec_command_set(
663 mount_unwatch_control_pid(m);
665 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
668 mount_set_state(m, MOUNT_MOUNTING);
673 log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
674 mount_enter_dead(m, false);
677 static void mount_enter_mounting_done(Mount *m) {
680 mount_set_state(m, MOUNT_MOUNTING_DONE);
683 static void mount_enter_remounting(Mount *m, bool success) {
691 m->control_command_id = MOUNT_EXEC_REMOUNT;
692 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
694 if (m->from_fragment) {
698 if (m->parameters_fragment.options) {
699 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
708 r = exec_command_set(
711 m->parameters_fragment.what,
713 "-t", m->parameters_fragment.fstype,
718 } else if (m->from_etc_fstab)
719 r = exec_command_set(
733 mount_unwatch_control_pid(m);
735 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
738 mount_set_state(m, MOUNT_REMOUNTING);
743 mount_enter_mounted(m, false);
746 static int mount_start(Unit *u) {
751 /* We cannot fulfill this request right now, try again later
753 if (m->state == MOUNT_UNMOUNTING ||
754 m->state == MOUNT_UNMOUNTING_SIGTERM ||
755 m->state == MOUNT_UNMOUNTING_SIGKILL)
759 if (m->state == MOUNT_MOUNTING ||
760 m->state == MOUNT_MOUNTING_SIGTERM ||
761 m->state == MOUNT_MOUNTING_SIGKILL)
764 assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
767 mount_enter_mounting(m);
771 static int mount_stop(Unit *u) {
776 /* Cann't do this right now. */
777 if (m->state == MOUNT_MOUNTING ||
778 m->state == MOUNT_MOUNTING_DONE ||
779 m->state == MOUNT_MOUNTING_SIGTERM ||
780 m->state == MOUNT_MOUNTING_SIGKILL ||
781 m->state == MOUNT_REMOUNTING ||
782 m->state == MOUNT_REMOUNTING_SIGTERM ||
783 m->state == MOUNT_REMOUNTING_SIGKILL)
787 if (m->state == MOUNT_UNMOUNTING ||
788 m->state == MOUNT_UNMOUNTING_SIGKILL ||
789 m->state == MOUNT_UNMOUNTING_SIGTERM)
792 assert(m->state == MOUNT_MOUNTED);
794 mount_enter_unmounting(m, true);
798 static int mount_reload(Unit *u) {
803 if (m->state == MOUNT_MOUNTING_DONE)
806 assert(m->state == MOUNT_MOUNTED);
808 mount_enter_remounting(m, true);
812 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
819 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
820 unit_serialize_item(u, f, "failure", yes_no(m->failure));
822 if (m->control_pid > 0)
823 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) m->control_pid);
825 if (m->control_command_id >= 0)
826 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
831 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
840 if (streq(key, "state")) {
843 if ((state = mount_state_from_string(value)) < 0)
844 log_debug("Failed to parse state value %s", value);
846 m->deserialized_state = state;
847 } else if (streq(key, "failure")) {
850 if ((b = parse_boolean(value)) < 0)
851 log_debug("Failed to parse failure value %s", value);
853 m->failure = b || m->failure;
855 } else if (streq(key, "control-pid")) {
858 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
859 log_debug("Failed to parse control-pid value %s", value);
861 m->control_pid = (pid_t) pid;
862 } else if (streq(key, "control-command")) {
865 if ((id = mount_exec_command_from_string(value)) < 0)
866 log_debug("Failed to parse exec-command value %s", value);
868 m->control_command_id = id;
869 m->control_command = m->exec_command + id;
873 log_debug("Unknown serialization key '%s'", key);
878 static UnitActiveState mount_active_state(Unit *u) {
881 return state_translation_table[MOUNT(u)->state];
884 static const char *mount_sub_state_to_string(Unit *u) {
887 return mount_state_to_string(MOUNT(u)->state);
890 static bool mount_check_gc(Unit *u) {
895 return m->from_etc_fstab || m->from_proc_self_mountinfo;
898 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
905 success = is_clean_exit(code, status);
906 m->failure = m->failure || !success;
908 assert(m->control_pid == pid);
911 if (m->control_command) {
912 exec_status_fill(&m->control_command->exec_status, pid, code, status);
913 m->control_command = NULL;
914 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
917 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
919 /* Note that mount(8) returning and the kernel sending us a
920 * mount table change event might happen out-of-order. If an
921 * operation succeed we assume the kernel will follow soon too
922 * and already change into the resulting state. If it fails
923 * we check if the kernel still knows about the mount. and
924 * change state accordingly. */
929 case MOUNT_MOUNTING_DONE:
930 case MOUNT_MOUNTING_SIGKILL:
931 case MOUNT_MOUNTING_SIGTERM:
932 case MOUNT_REMOUNTING:
933 case MOUNT_REMOUNTING_SIGKILL:
934 case MOUNT_REMOUNTING_SIGTERM:
936 if (success && m->from_proc_self_mountinfo)
937 mount_enter_mounted(m, true);
938 else if (m->from_proc_self_mountinfo)
939 mount_enter_mounted(m, false);
941 mount_enter_dead(m, false);
944 case MOUNT_UNMOUNTING:
945 case MOUNT_UNMOUNTING_SIGKILL:
946 case MOUNT_UNMOUNTING_SIGTERM:
949 mount_enter_dead(m, true);
950 else if (m->from_proc_self_mountinfo)
951 mount_enter_mounted(m, false);
953 mount_enter_dead(m, false);
957 assert_not_reached("Uh, control process died at wrong time.");
961 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
965 assert(elapsed == 1);
966 assert(w == &m->timer_watch);
971 case MOUNT_MOUNTING_DONE:
972 log_warning("%s mounting timed out. Stopping.", u->meta.id);
973 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
976 case MOUNT_REMOUNTING:
977 log_warning("%s remounting timed out. Stopping.", u->meta.id);
978 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
981 case MOUNT_UNMOUNTING:
982 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
983 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
986 case MOUNT_MOUNTING_SIGTERM:
987 log_warning("%s mounting timed out. Killing.", u->meta.id);
988 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
991 case MOUNT_REMOUNTING_SIGTERM:
992 log_warning("%s remounting timed out. Killing.", u->meta.id);
993 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
996 case MOUNT_UNMOUNTING_SIGTERM:
997 log_warning("%s unmounting timed out. Killing.", u->meta.id);
998 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1001 case MOUNT_MOUNTING_SIGKILL:
1002 case MOUNT_REMOUNTING_SIGKILL:
1003 case MOUNT_UNMOUNTING_SIGKILL:
1004 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1006 if (m->from_proc_self_mountinfo)
1007 mount_enter_mounted(m, false);
1009 mount_enter_dead(m, false);
1013 assert_not_reached("Timeout at wrong time.");
1017 static int mount_add_one(
1021 const char *options,
1023 bool from_proc_self_mountinfo,
1028 char *e, *w = NULL, *o = NULL, *f = NULL;
1037 assert(!set_flags || from_proc_self_mountinfo);
1039 /* Ignore API mount points. They should never be referenced in
1040 * dependencies ever. */
1041 if (mount_point_is_api(where))
1044 if (streq(fstype, "autofs"))
1047 /* probably some kind of swap, ignore */
1048 if (!is_path(where))
1051 if (!(e = unit_name_from_path(where, ".mount")))
1054 if (!(u = manager_get_unit(m, e))) {
1057 if (!(u = unit_new(m))) {
1062 r = unit_add_name(u, e);
1068 if (!(MOUNT(u)->where = strdup(where))) {
1073 unit_add_to_load_queue(u);
1079 if (!(w = strdup(what)) ||
1080 !(o = strdup(options)) ||
1081 !(f = strdup(fstype))) {
1086 if (from_proc_self_mountinfo) {
1087 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1090 MOUNT(u)->is_mounted = true;
1091 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1092 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1095 MOUNT(u)->from_proc_self_mountinfo = true;
1097 p = &MOUNT(u)->parameters_etc_fstab;
1098 MOUNT(u)->from_etc_fstab = true;
1110 unit_add_to_dbus_queue(u);
1125 static char *fstab_node_to_udev_node(char *p) {
1129 /* FIXME: to follow udev's logic 100% we need to leave valid
1130 * UTF8 chars unescaped */
1132 if (startswith(p, "LABEL=")) {
1134 if (!(t = xescape(p+6, "/ ")))
1137 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1146 if (startswith(p, "UUID=")) {
1148 if (!(t = xescape(p+5, "/ ")))
1151 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1163 static int mount_find_pri(char *options) {
1167 if (!(pri = mount_test_option(options, "pri=")))
1173 r = strtoul(pri, &end, 10);
1178 if (end == pri || (*end != ',' && *end != 0))
1184 static int mount_load_etc_fstab(Manager *m) {
1192 if (!(f = setmntent("/etc/fstab", "r")))
1195 while ((me = getmntent(f))) {
1198 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1203 if (!(where = strdup(me->mnt_dir))) {
1210 path_kill_slashes(what);
1212 if (where[0] == '/')
1213 path_kill_slashes(where);
1215 if (streq(me->mnt_type, "swap")) {
1218 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1224 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1225 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1228 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1244 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1246 char *device, *path, *options, *fstype, *d, *p;
1250 rewind(m->proc_self_mountinfo);
1255 device = path = options = fstype = d = p = NULL;
1257 if ((k = fscanf(m->proc_self_mountinfo,
1258 "%*s " /* (1) mount id */
1259 "%*s " /* (2) parent id */
1260 "%*s " /* (3) major:minor */
1261 "%*s " /* (4) root */
1262 "%ms " /* (5) mount point */
1263 "%ms" /* (6) mount options */
1264 "%*[^-]" /* (7) optional fields */
1265 "- " /* (8) seperator */
1266 "%ms " /* (9) file system type */
1267 "%ms" /* (10) mount source */
1268 "%*[^\n]", /* some rubbish at the end */
1281 if (!(d = cunescape(device)) ||
1282 !(p = cunescape(path))) {
1287 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1311 static void mount_shutdown(Manager *m) {
1314 if (m->proc_self_mountinfo) {
1315 fclose(m->proc_self_mountinfo);
1316 m->proc_self_mountinfo = NULL;
1320 static int mount_enumerate(Manager *m) {
1322 struct epoll_event ev;
1325 if (!m->proc_self_mountinfo) {
1326 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1329 m->mount_watch.type = WATCH_MOUNT;
1330 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1333 ev.events = EPOLLERR;
1334 ev.data.ptr = &m->mount_watch;
1336 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1340 if ((r = mount_load_etc_fstab(m)) < 0)
1343 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1353 void mount_fd_event(Manager *m, int events) {
1358 assert(events == EPOLLERR);
1360 /* The manager calls this for every fd event happening on the
1361 * /proc/self/mountinfo file, which informs us about mounting
1364 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1365 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
1367 /* Reset flags, just in case, for later calls */
1368 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1369 Mount *mount = (Mount*) meta;
1371 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1377 manager_dispatch_load_queue(m);
1379 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1380 Mount *mount = (Mount*) meta;
1382 if (!mount->is_mounted) {
1383 /* This has just been unmounted. */
1385 mount->from_proc_self_mountinfo = false;
1387 switch (mount->state) {
1390 mount_enter_dead(mount, true);
1394 mount_set_state(mount, mount->state);
1399 } else if (mount->just_mounted || mount->just_changed) {
1401 /* New or changed entrymount */
1403 switch (mount->state) {
1406 case MOUNT_MAINTAINANCE:
1407 mount_enter_mounted(mount, true);
1410 case MOUNT_MOUNTING:
1411 mount_enter_mounting_done(mount);
1415 /* Nothing really changed, but let's
1416 * issue an notification call
1417 * nonetheless, in case somebody is
1418 * waiting for this. (e.g. file system
1419 * ro/rw remounts.) */
1420 mount_set_state(mount, mount->state);
1425 /* Reset the flags for later calls */
1426 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1430 int mount_path_is_mounted(Manager *m, const char* path) {
1440 if (!(t = strdup(path)))
1443 path_kill_slashes(t);
1449 if (!(e = unit_name_from_path(t, ".mount"))) {
1454 u = manager_get_unit(m, e);
1458 (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1459 MOUNT(u)->state != MOUNT_MOUNTED) {
1464 assert_se(slash = strrchr(t, '/'));
1481 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1482 [MOUNT_DEAD] = "dead",
1483 [MOUNT_MOUNTING] = "mounting",
1484 [MOUNT_MOUNTING_DONE] = "mounting-done",
1485 [MOUNT_MOUNTED] = "mounted",
1486 [MOUNT_REMOUNTING] = "remounting",
1487 [MOUNT_UNMOUNTING] = "unmounting",
1488 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1489 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1490 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1491 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1492 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1493 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1494 [MOUNT_MAINTAINANCE] = "maintainance"
1497 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1499 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1500 [MOUNT_EXEC_MOUNT] = "ExecMount",
1501 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1502 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1505 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1507 const UnitVTable mount_vtable = {
1511 .no_instances = true,
1518 .coldplug = mount_coldplug,
1522 .start = mount_start,
1524 .reload = mount_reload,
1526 .serialize = mount_serialize,
1527 .deserialize_item = mount_deserialize_item,
1529 .active_state = mount_active_state,
1530 .sub_state_to_string = mount_sub_state_to_string,
1532 .check_gc = mount_check_gc,
1534 .sigchld_event = mount_sigchld_event,
1535 .timer_event = mount_timer_event,
1537 .bus_message_handler = bus_mount_message_handler,
1539 .enumerate = mount_enumerate,
1540 .shutdown = mount_shutdown