1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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"
36 #include "dbus-mount.h"
38 #include "bus-errors.h"
39 #include "exit-status.h"
42 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
43 [MOUNT_DEAD] = UNIT_INACTIVE,
44 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
45 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
46 [MOUNT_MOUNTED] = UNIT_ACTIVE,
47 [MOUNT_REMOUNTING] = UNIT_RELOADING,
48 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
49 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
50 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
51 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
52 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
53 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
54 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
55 [MOUNT_FAILED] = UNIT_FAILED
58 static void mount_init(Unit *u) {
62 assert(u->load_state == UNIT_STUB);
64 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
65 m->directory_mode = 0755;
67 exec_context_init(&m->exec_context);
69 /* The stdio/kmsg bridge socket is on /, in order to avoid a
70 * dep loop, don't use kmsg logging for -.mount */
71 if (!unit_has_name(u, "-.mount")) {
72 m->exec_context.std_output = u->manager->default_std_output;
73 m->exec_context.std_error = u->manager->default_std_error;
76 /* We need to make sure that /bin/mount is always called in
77 * the same process group as us, so that the autofs kernel
78 * side doesn't send us another mount request while we are
79 * already trying to comply its last one. */
80 m->exec_context.same_pgrp = true;
82 m->timer_watch.type = WATCH_INVALID;
84 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
86 UNIT(m)->ignore_on_isolate = true;
89 static void mount_unwatch_control_pid(Mount *m) {
92 if (m->control_pid <= 0)
95 unit_unwatch_pid(UNIT(m), m->control_pid);
99 static void mount_parameters_done(MountParameters *p) {
106 p->what = p->options = p->fstype = NULL;
109 static void mount_done(Unit *u) {
117 mount_parameters_done(&m->parameters_etc_fstab);
118 mount_parameters_done(&m->parameters_proc_self_mountinfo);
119 mount_parameters_done(&m->parameters_fragment);
121 exec_context_done(&m->exec_context);
122 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
123 m->control_command = NULL;
125 mount_unwatch_control_pid(m);
127 unit_unwatch_timer(u, &m->timer_watch);
130 static MountParameters* get_mount_parameters_configured(Mount *m) {
133 if (m->from_fragment)
134 return &m->parameters_fragment;
135 else if (m->from_etc_fstab)
136 return &m->parameters_etc_fstab;
141 static MountParameters* get_mount_parameters(Mount *m) {
144 if (m->from_proc_self_mountinfo)
145 return &m->parameters_proc_self_mountinfo;
147 return get_mount_parameters_configured(m);
150 static int mount_add_mount_links(Mount *m) {
157 pm = get_mount_parameters_configured(m);
159 /* Adds in links to other mount points that might lie below or
160 * above us in the hierarchy */
162 LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_MOUNT]) {
163 Mount *n = MOUNT(other);
169 if (UNIT(n)->load_state != UNIT_LOADED)
172 pn = get_mount_parameters_configured(n);
174 if (path_startswith(m->where, n->where)) {
176 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
180 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
183 } else if (path_startswith(n->where, m->where)) {
185 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
189 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
192 } else if (pm && path_startswith(pm->what, n->where)) {
194 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
197 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
200 } else if (pn && path_startswith(pn->what, m->where)) {
202 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
205 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
213 static int mount_add_swap_links(Mount *m) {
219 LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_SWAP])
220 if ((r = swap_add_one_mount_link(SWAP(other), m)) < 0)
226 static int mount_add_path_links(Mount *m) {
232 LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_PATH])
233 if ((r = path_add_one_mount_link(PATH(other), m)) < 0)
239 static int mount_add_automount_links(Mount *m) {
245 LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_AUTOMOUNT])
246 if ((r = automount_add_one_mount_link(AUTOMOUNT(other), m)) < 0)
252 static int mount_add_socket_links(Mount *m) {
258 LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_SOCKET])
259 if ((r = socket_add_one_mount_link(SOCKET(other), m)) < 0)
265 static char* mount_test_option(const char *haystack, const char *needle) {
270 /* Like glibc's hasmntopt(), but works on a string, not a
277 me.mnt_opts = (char*) haystack;
279 return hasmntopt(&me, needle);
282 static bool mount_is_network(MountParameters *p) {
285 if (mount_test_option(p->options, "_netdev"))
288 if (p->fstype && fstype_is_network(p->fstype))
294 static bool mount_is_bind(MountParameters *p) {
297 if (mount_test_option(p->options, "bind"))
300 if (p->fstype && streq(p->fstype, "bind"))
306 static bool needs_quota(MountParameters *p) {
309 if (mount_is_network(p))
312 if (mount_is_bind(p))
315 return mount_test_option(p->options, "usrquota") ||
316 mount_test_option(p->options, "grpquota") ||
317 mount_test_option(p->options, "quota") ||
318 mount_test_option(p->options, "usrjquota") ||
319 mount_test_option(p->options, "grpjquota");
322 static int mount_add_fstab_links(Mount *m) {
323 const char *target, *after = NULL, *after2 = NULL;
327 bool noauto, nofail, handle, automount;
331 if (UNIT(m)->manager->running_as != MANAGER_SYSTEM)
334 if (!(p = get_mount_parameters_configured(m)))
337 if (p != &m->parameters_etc_fstab)
340 noauto = !!mount_test_option(p->options, "noauto");
341 nofail = !!mount_test_option(p->options, "nofail");
343 mount_test_option(p->options, "comment=systemd.automount") ||
344 mount_test_option(p->options, "x-systemd-automount");
347 mount_test_option(p->options, "comment=systemd.mount") ||
348 mount_test_option(p->options, "x-systemd-mount") ||
349 UNIT(m)->manager->mount_auto;
351 if (mount_is_network(p)) {
352 target = SPECIAL_REMOTE_FS_TARGET;
353 after = SPECIAL_REMOTE_FS_PRE_TARGET;
354 after2 = SPECIAL_NETWORK_TARGET;
356 target = SPECIAL_LOCAL_FS_TARGET;
357 after = SPECIAL_LOCAL_FS_PRE_TARGET;
360 if ((r = manager_load_unit(UNIT(m)->manager, target, NULL, NULL, &tu)) < 0)
364 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
368 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true)) < 0)
374 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
377 /* If auto is configured as well also pull in the
378 * mount right-away, but don't rely on it. */
379 if (!noauto) /* automount + auto */
380 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
383 /* Install automount unit */
384 if (!nofail) /* automount + fail */
385 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, am, true);
386 else /* automount + nofail */
387 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, am, true);
389 } else if (handle && !noauto) {
391 /* Automatically add mount points that aren't natively
392 * configured to local-fs.target */
394 if (!nofail) /* auto + fail */
395 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
396 else /* auto + nofail */
397 return unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true);
403 static int mount_add_device_links(Mount *m) {
409 if (!(p = get_mount_parameters_configured(m)))
415 if (!mount_is_bind(p) &&
416 !path_equal(m->where, "/") &&
417 p == &m->parameters_etc_fstab) {
420 noauto = !!mount_test_option(p->options, "noauto");
421 nofail = !!mount_test_option(p->options, "nofail");
423 if ((r = unit_add_node_link(UNIT(m), p->what,
425 UNIT(m)->manager->running_as == MANAGER_SYSTEM)) < 0)
431 UNIT(m)->manager->running_as == MANAGER_SYSTEM &&
432 !path_equal(m->where, "/")) {
435 /* Let's add in the fsck service */
437 /* aka SPECIAL_FSCK_SERVICE */
438 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
441 if ((r = manager_load_unit_prepare(UNIT(m)->manager, name, NULL, NULL, &fsck)) < 0) {
442 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
449 SERVICE(fsck)->fsck_passno = p->passno;
451 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
458 static int mount_add_default_dependencies(Mount *m) {
464 if (UNIT(m)->manager->running_as != MANAGER_SYSTEM)
467 p = get_mount_parameters_configured(m);
468 if (p && needs_quota(p)) {
469 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
470 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
474 if (!path_equal(m->where, "/"))
475 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
481 static int mount_fix_timeouts(Mount *m) {
483 const char *timeout = NULL;
492 if (!(p = get_mount_parameters_configured(m)))
495 /* Allow configuration how long we wait for a device that
496 * backs a mount point to show up. This is useful to support
497 * endless device timeouts for devices that show up only after
498 * user input, like crypto devices. */
500 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
502 else if ((timeout = mount_test_option(p->options, "x-systemd-device-timeout")))
507 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
511 r = parse_usec(t, &u);
515 log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout);
519 SET_FOREACH(other, UNIT(m)->dependencies[UNIT_AFTER], i) {
520 if (other->type != UNIT_DEVICE)
523 other->job_timeout = u;
529 static int mount_verify(Mount *m) {
534 if (UNIT(m)->load_state != UNIT_LOADED)
537 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
540 if (!(e = unit_name_from_path(m->where, ".mount")))
543 b = unit_has_name(UNIT(m), e);
547 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->id);
551 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
552 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
556 if (UNIT(m)->fragment_path && !m->parameters_fragment.what) {
557 log_error("%s's What setting is missing. Refusing.", UNIT(m)->id);
561 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
562 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(m)->id);
569 static int mount_load(Unit *u) {
574 assert(u->load_state == UNIT_STUB);
576 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
579 /* This is a new unit? Then let's add in some extras */
580 if (u->load_state == UNIT_LOADED) {
581 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
584 if (UNIT(m)->fragment_path)
585 m->from_fragment = true;
588 if (!(m->where = unit_name_to_path(u->id)))
591 path_kill_slashes(m->where);
593 if (!UNIT(m)->description)
594 if ((r = unit_set_description(u, m->where)) < 0)
597 if ((r = mount_add_device_links(m)) < 0)
600 if ((r = mount_add_mount_links(m)) < 0)
603 if ((r = mount_add_socket_links(m)) < 0)
606 if ((r = mount_add_swap_links(m)) < 0)
609 if ((r = mount_add_path_links(m)) < 0)
612 if ((r = mount_add_automount_links(m)) < 0)
615 if ((r = mount_add_fstab_links(m)) < 0)
618 if (UNIT(m)->default_dependencies)
619 if ((r = mount_add_default_dependencies(m)) < 0)
622 if ((r = unit_add_default_cgroups(u)) < 0)
625 mount_fix_timeouts(m);
628 return mount_verify(m);
631 static int mount_notify_automount(Mount *m, int status) {
638 SET_FOREACH(p, UNIT(m)->dependencies[UNIT_TRIGGERED_BY], i)
639 if (p->type == UNIT_AUTOMOUNT) {
640 r = automount_send_ready(AUTOMOUNT(p), status);
648 static void mount_set_state(Mount *m, MountState state) {
649 MountState old_state;
652 old_state = m->state;
655 if (state != MOUNT_MOUNTING &&
656 state != MOUNT_MOUNTING_DONE &&
657 state != MOUNT_REMOUNTING &&
658 state != MOUNT_UNMOUNTING &&
659 state != MOUNT_MOUNTING_SIGTERM &&
660 state != MOUNT_MOUNTING_SIGKILL &&
661 state != MOUNT_UNMOUNTING_SIGTERM &&
662 state != MOUNT_UNMOUNTING_SIGKILL &&
663 state != MOUNT_REMOUNTING_SIGTERM &&
664 state != MOUNT_REMOUNTING_SIGKILL) {
665 unit_unwatch_timer(UNIT(m), &m->timer_watch);
666 mount_unwatch_control_pid(m);
667 m->control_command = NULL;
668 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
671 if (state == MOUNT_MOUNTED ||
672 state == MOUNT_REMOUNTING)
673 mount_notify_automount(m, 0);
674 else if (state == MOUNT_DEAD ||
675 state == MOUNT_UNMOUNTING ||
676 state == MOUNT_MOUNTING_SIGTERM ||
677 state == MOUNT_MOUNTING_SIGKILL ||
678 state == MOUNT_REMOUNTING_SIGTERM ||
679 state == MOUNT_REMOUNTING_SIGKILL ||
680 state == MOUNT_UNMOUNTING_SIGTERM ||
681 state == MOUNT_UNMOUNTING_SIGKILL ||
682 state == MOUNT_FAILED)
683 mount_notify_automount(m, -ENODEV);
685 if (state != old_state)
686 log_debug("%s changed %s -> %s",
688 mount_state_to_string(old_state),
689 mount_state_to_string(state));
691 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
692 m->reload_failure = false;
695 static int mount_coldplug(Unit *u) {
697 MountState new_state = MOUNT_DEAD;
701 assert(m->state == MOUNT_DEAD);
703 if (m->deserialized_state != m->state)
704 new_state = m->deserialized_state;
705 else if (m->from_proc_self_mountinfo)
706 new_state = MOUNT_MOUNTED;
708 if (new_state != m->state) {
710 if (new_state == MOUNT_MOUNTING ||
711 new_state == MOUNT_MOUNTING_DONE ||
712 new_state == MOUNT_REMOUNTING ||
713 new_state == MOUNT_UNMOUNTING ||
714 new_state == MOUNT_MOUNTING_SIGTERM ||
715 new_state == MOUNT_MOUNTING_SIGKILL ||
716 new_state == MOUNT_UNMOUNTING_SIGTERM ||
717 new_state == MOUNT_UNMOUNTING_SIGKILL ||
718 new_state == MOUNT_REMOUNTING_SIGTERM ||
719 new_state == MOUNT_REMOUNTING_SIGKILL) {
721 if (m->control_pid <= 0)
724 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
727 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
731 mount_set_state(m, new_state);
737 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
744 p = get_mount_parameters(m);
747 "%sMount State: %s\n"
750 "%sFile System Type: %s\n"
752 "%sFrom /etc/fstab: %s\n"
753 "%sFrom /proc/self/mountinfo: %s\n"
754 "%sFrom fragment: %s\n"
755 "%sDirectoryMode: %04o\n",
756 prefix, mount_state_to_string(m->state),
758 prefix, strna(p->what),
759 prefix, strna(p->fstype),
760 prefix, strna(p->options),
761 prefix, yes_no(m->from_etc_fstab),
762 prefix, yes_no(m->from_proc_self_mountinfo),
763 prefix, yes_no(m->from_fragment),
764 prefix, m->directory_mode);
766 if (m->control_pid > 0)
768 "%sControl PID: %lu\n",
769 prefix, (unsigned long) m->control_pid);
771 exec_context_dump(&m->exec_context, f, prefix);
774 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
782 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
785 if ((r = exec_spawn(c,
789 UNIT(m)->manager->environment,
793 UNIT(m)->manager->confirm_spawn,
794 UNIT(m)->cgroup_bondings,
795 UNIT(m)->cgroup_attributes,
799 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
800 /* FIXME: we need to do something here */
808 unit_unwatch_timer(UNIT(m), &m->timer_watch);
813 static void mount_enter_dead(Mount *m, bool success) {
819 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
822 static void mount_enter_mounted(Mount *m, bool success) {
828 mount_set_state(m, MOUNT_MOUNTED);
831 static void mount_enter_signal(Mount *m, MountState state, bool success) {
834 bool wait_for_exit = false;
841 if (m->exec_context.kill_mode != KILL_NONE) {
842 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
843 state == MOUNT_UNMOUNTING_SIGTERM ||
844 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
846 if (m->control_pid > 0) {
847 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
849 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
851 wait_for_exit = true;
854 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
856 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
861 /* Exclude the control pid from being killed via the cgroup */
862 if (m->control_pid > 0)
863 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
866 if ((r = cgroup_bonding_kill_list(UNIT(m)->cgroup_bondings, sig, true, pid_set)) < 0) {
867 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
868 log_warning("Failed to kill control group: %s", strerror(-r));
870 wait_for_exit = true;
878 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
881 mount_set_state(m, state);
882 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
883 mount_enter_mounted(m, true);
885 mount_enter_dead(m, true);
890 log_warning("%s failed to kill processes: %s", UNIT(m)->id, strerror(-r));
892 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
893 mount_enter_mounted(m, false);
895 mount_enter_dead(m, false);
901 static void mount_enter_unmounting(Mount *m, bool success) {
909 m->control_command_id = MOUNT_EXEC_UNMOUNT;
910 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
912 if ((r = exec_command_set(
919 mount_unwatch_control_pid(m);
921 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
924 mount_set_state(m, MOUNT_UNMOUNTING);
929 log_warning("%s failed to run 'umount' task: %s", UNIT(m)->id, strerror(-r));
930 mount_enter_mounted(m, false);
933 static void mount_enter_mounting(Mount *m) {
939 m->control_command_id = MOUNT_EXEC_MOUNT;
940 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
942 mkdir_p(m->where, m->directory_mode);
944 /* Create the source directory for bind-mounts if needed */
945 p = get_mount_parameters_configured(m);
946 if (p && mount_is_bind(p))
947 mkdir_p(p->what, m->directory_mode);
949 if (m->from_fragment)
950 r = exec_command_set(
953 m->parameters_fragment.what,
955 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
956 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
958 else if (m->from_etc_fstab)
959 r = exec_command_set(
970 mount_unwatch_control_pid(m);
972 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
975 mount_set_state(m, MOUNT_MOUNTING);
980 log_warning("%s failed to run 'mount' task: %s", UNIT(m)->id, strerror(-r));
981 mount_enter_dead(m, false);
984 static void mount_enter_mounting_done(Mount *m) {
987 mount_set_state(m, MOUNT_MOUNTING_DONE);
990 static void mount_enter_remounting(Mount *m, bool success) {
998 m->control_command_id = MOUNT_EXEC_REMOUNT;
999 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
1001 if (m->from_fragment) {
1005 if (m->parameters_fragment.options) {
1006 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
1015 r = exec_command_set(
1018 m->parameters_fragment.what,
1020 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1025 } else if (m->from_etc_fstab)
1026 r = exec_command_set(
1038 mount_unwatch_control_pid(m);
1040 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
1043 mount_set_state(m, MOUNT_REMOUNTING);
1048 log_warning("%s failed to run 'remount' task: %s", UNIT(m)->id, strerror(-r));
1049 m->reload_failure = true;
1050 mount_enter_mounted(m, true);
1053 static int mount_start(Unit *u) {
1054 Mount *m = MOUNT(u);
1058 /* We cannot fulfill this request right now, try again later
1060 if (m->state == MOUNT_UNMOUNTING ||
1061 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1062 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1063 m->state == MOUNT_MOUNTING_SIGTERM ||
1064 m->state == MOUNT_MOUNTING_SIGKILL)
1067 /* Already on it! */
1068 if (m->state == MOUNT_MOUNTING)
1071 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1074 mount_enter_mounting(m);
1078 static int mount_stop(Unit *u) {
1079 Mount *m = MOUNT(u);
1084 if (m->state == MOUNT_UNMOUNTING ||
1085 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1086 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1087 m->state == MOUNT_MOUNTING_SIGTERM ||
1088 m->state == MOUNT_MOUNTING_SIGKILL)
1091 assert(m->state == MOUNT_MOUNTING ||
1092 m->state == MOUNT_MOUNTING_DONE ||
1093 m->state == MOUNT_MOUNTED ||
1094 m->state == MOUNT_REMOUNTING ||
1095 m->state == MOUNT_REMOUNTING_SIGTERM ||
1096 m->state == MOUNT_REMOUNTING_SIGKILL);
1098 mount_enter_unmounting(m, true);
1102 static int mount_reload(Unit *u) {
1103 Mount *m = MOUNT(u);
1107 if (m->state == MOUNT_MOUNTING_DONE)
1110 assert(m->state == MOUNT_MOUNTED);
1112 mount_enter_remounting(m, true);
1116 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1117 Mount *m = MOUNT(u);
1123 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1124 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1126 if (m->control_pid > 0)
1127 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1129 if (m->control_command_id >= 0)
1130 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1135 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1136 Mount *m = MOUNT(u);
1143 if (streq(key, "state")) {
1146 if ((state = mount_state_from_string(value)) < 0)
1147 log_debug("Failed to parse state value %s", value);
1149 m->deserialized_state = state;
1150 } else if (streq(key, "failure")) {
1153 if ((b = parse_boolean(value)) < 0)
1154 log_debug("Failed to parse failure value %s", value);
1156 m->failure = b || m->failure;
1158 } else if (streq(key, "control-pid")) {
1161 if (parse_pid(value, &pid) < 0)
1162 log_debug("Failed to parse control-pid value %s", value);
1164 m->control_pid = pid;
1165 } else if (streq(key, "control-command")) {
1166 MountExecCommand id;
1168 if ((id = mount_exec_command_from_string(value)) < 0)
1169 log_debug("Failed to parse exec-command value %s", value);
1171 m->control_command_id = id;
1172 m->control_command = m->exec_command + id;
1176 log_debug("Unknown serialization key '%s'", key);
1181 static UnitActiveState mount_active_state(Unit *u) {
1184 return state_translation_table[MOUNT(u)->state];
1187 static const char *mount_sub_state_to_string(Unit *u) {
1190 return mount_state_to_string(MOUNT(u)->state);
1193 static bool mount_check_gc(Unit *u) {
1194 Mount *m = MOUNT(u);
1198 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1201 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1202 Mount *m = MOUNT(u);
1208 if (pid != m->control_pid)
1213 success = is_clean_exit(code, status);
1214 m->failure = m->failure || !success;
1216 if (m->control_command) {
1217 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1218 m->control_command = NULL;
1219 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1222 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1223 "%s mount process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status);
1225 /* Note that mount(8) returning and the kernel sending us a
1226 * mount table change event might happen out-of-order. If an
1227 * operation succeed we assume the kernel will follow soon too
1228 * and already change into the resulting state. If it fails
1229 * we check if the kernel still knows about the mount. and
1230 * change state accordingly. */
1234 case MOUNT_MOUNTING:
1235 case MOUNT_MOUNTING_DONE:
1236 case MOUNT_MOUNTING_SIGKILL:
1237 case MOUNT_MOUNTING_SIGTERM:
1240 mount_enter_mounted(m, true);
1241 else if (m->from_proc_self_mountinfo)
1242 mount_enter_mounted(m, false);
1244 mount_enter_dead(m, false);
1247 case MOUNT_REMOUNTING:
1248 case MOUNT_REMOUNTING_SIGKILL:
1249 case MOUNT_REMOUNTING_SIGTERM:
1251 m->reload_failure = !success;
1252 if (m->from_proc_self_mountinfo)
1253 mount_enter_mounted(m, true);
1255 mount_enter_dead(m, true);
1259 case MOUNT_UNMOUNTING:
1260 case MOUNT_UNMOUNTING_SIGKILL:
1261 case MOUNT_UNMOUNTING_SIGTERM:
1264 mount_enter_dead(m, true);
1265 else if (m->from_proc_self_mountinfo)
1266 mount_enter_mounted(m, false);
1268 mount_enter_dead(m, false);
1272 assert_not_reached("Uh, control process died at wrong time.");
1275 /* Notify clients about changed exit status */
1276 unit_add_to_dbus_queue(u);
1279 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1280 Mount *m = MOUNT(u);
1283 assert(elapsed == 1);
1284 assert(w == &m->timer_watch);
1288 case MOUNT_MOUNTING:
1289 case MOUNT_MOUNTING_DONE:
1290 log_warning("%s mounting timed out. Stopping.", u->id);
1291 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1294 case MOUNT_REMOUNTING:
1295 log_warning("%s remounting timed out. Stopping.", u->id);
1296 m->reload_failure = true;
1297 mount_enter_mounted(m, true);
1300 case MOUNT_UNMOUNTING:
1301 log_warning("%s unmounting timed out. Stopping.", u->id);
1302 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1305 case MOUNT_MOUNTING_SIGTERM:
1306 if (m->exec_context.send_sigkill) {
1307 log_warning("%s mounting timed out. Killing.", u->id);
1308 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1310 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->id);
1312 if (m->from_proc_self_mountinfo)
1313 mount_enter_mounted(m, false);
1315 mount_enter_dead(m, false);
1319 case MOUNT_REMOUNTING_SIGTERM:
1320 if (m->exec_context.send_sigkill) {
1321 log_warning("%s remounting timed out. Killing.", u->id);
1322 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1324 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->id);
1326 if (m->from_proc_self_mountinfo)
1327 mount_enter_mounted(m, false);
1329 mount_enter_dead(m, false);
1333 case MOUNT_UNMOUNTING_SIGTERM:
1334 if (m->exec_context.send_sigkill) {
1335 log_warning("%s unmounting timed out. Killing.", u->id);
1336 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1338 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->id);
1340 if (m->from_proc_self_mountinfo)
1341 mount_enter_mounted(m, false);
1343 mount_enter_dead(m, false);
1347 case MOUNT_MOUNTING_SIGKILL:
1348 case MOUNT_REMOUNTING_SIGKILL:
1349 case MOUNT_UNMOUNTING_SIGKILL:
1350 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->id);
1352 if (m->from_proc_self_mountinfo)
1353 mount_enter_mounted(m, false);
1355 mount_enter_dead(m, false);
1359 assert_not_reached("Timeout at wrong time.");
1363 static int mount_add_one(
1367 const char *options,
1370 bool from_proc_self_mountinfo,
1375 char *e, *w = NULL, *o = NULL, *f = NULL;
1384 assert(!set_flags || from_proc_self_mountinfo);
1386 /* Ignore API mount points. They should never be referenced in
1387 * dependencies ever. */
1388 if (mount_point_is_api(where) || mount_point_ignore(where))
1391 if (streq(fstype, "autofs"))
1394 /* probably some kind of swap, ignore */
1395 if (!is_path(where))
1398 e = unit_name_from_path(where, ".mount");
1402 u = manager_get_unit(m, e);
1406 u = unit_new(m, sizeof(Mount));
1412 r = unit_add_name(u, e);
1418 MOUNT(u)->where = strdup(where);
1419 if (!MOUNT(u)->where) {
1424 unit_add_to_load_queue(u);
1430 if (!(w = strdup(what)) ||
1431 !(o = strdup(options)) ||
1432 !(f = strdup(fstype))) {
1437 if (from_proc_self_mountinfo) {
1438 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1441 MOUNT(u)->is_mounted = true;
1442 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1443 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1446 MOUNT(u)->from_proc_self_mountinfo = true;
1448 p = &MOUNT(u)->parameters_etc_fstab;
1449 MOUNT(u)->from_etc_fstab = true;
1463 unit_add_to_dbus_queue(u);
1478 static int mount_find_pri(char *options) {
1482 if (!(pri = mount_test_option(options, "pri")))
1488 r = strtoul(pri, &end, 10);
1493 if (end == pri || (*end != ',' && *end != 0))
1499 static int mount_load_etc_fstab(Manager *m) {
1507 if (!(f = setmntent("/etc/fstab", "r")))
1510 while ((me = getmntent(f))) {
1514 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1519 if (!(where = strdup(me->mnt_dir))) {
1526 path_kill_slashes(what);
1528 if (where[0] == '/')
1529 path_kill_slashes(where);
1531 if (streq(me->mnt_type, "swap")) {
1534 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1541 !!mount_test_option(me->mnt_opts, "noauto"),
1542 !!mount_test_option(me->mnt_opts, "nofail"),
1543 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1546 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1561 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1564 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1568 rewind(m->proc_self_mountinfo);
1573 device = path = options = options2 = fstype = d = p = o = NULL;
1575 if ((k = fscanf(m->proc_self_mountinfo,
1576 "%*s " /* (1) mount id */
1577 "%*s " /* (2) parent id */
1578 "%*s " /* (3) major:minor */
1579 "%*s " /* (4) root */
1580 "%ms " /* (5) mount point */
1581 "%ms" /* (6) mount options */
1582 "%*[^-]" /* (7) optional fields */
1583 "- " /* (8) separator */
1584 "%ms " /* (9) file system type */
1585 "%ms" /* (10) mount source */
1586 "%ms" /* (11) mount options 2 */
1587 "%*[^\n]", /* some rubbish at the end */
1597 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1601 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1606 if (!(d = cunescape(device)) ||
1607 !(p = cunescape(path))) {
1612 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1639 static void mount_shutdown(Manager *m) {
1642 if (m->proc_self_mountinfo) {
1643 fclose(m->proc_self_mountinfo);
1644 m->proc_self_mountinfo = NULL;
1648 static int mount_enumerate(Manager *m) {
1650 struct epoll_event ev;
1653 if (!m->proc_self_mountinfo) {
1654 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1657 m->mount_watch.type = WATCH_MOUNT;
1658 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1661 ev.events = EPOLLPRI;
1662 ev.data.ptr = &m->mount_watch;
1664 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1668 if ((r = mount_load_etc_fstab(m)) < 0)
1671 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1681 void mount_fd_event(Manager *m, int events) {
1686 assert(events & EPOLLPRI);
1688 /* The manager calls this for every fd event happening on the
1689 * /proc/self/mountinfo file, which informs us about mounting
1692 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1693 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1695 /* Reset flags, just in case, for later calls */
1696 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1697 Mount *mount = MOUNT(u);
1699 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1705 manager_dispatch_load_queue(m);
1707 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1708 Mount *mount = MOUNT(u);
1710 if (!mount->is_mounted) {
1711 /* This has just been unmounted. */
1713 mount->from_proc_self_mountinfo = false;
1715 switch (mount->state) {
1718 mount_enter_dead(mount, true);
1722 mount_set_state(mount, mount->state);
1727 } else if (mount->just_mounted || mount->just_changed) {
1729 /* New or changed mount entry */
1731 switch (mount->state) {
1735 mount_enter_mounted(mount, true);
1738 case MOUNT_MOUNTING:
1739 mount_enter_mounting_done(mount);
1743 /* Nothing really changed, but let's
1744 * issue an notification call
1745 * nonetheless, in case somebody is
1746 * waiting for this. (e.g. file system
1747 * ro/rw remounts.) */
1748 mount_set_state(mount, mount->state);
1753 /* Reset the flags for later calls */
1754 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1758 static void mount_reset_failed(Unit *u) {
1759 Mount *m = MOUNT(u);
1763 if (m->state == MOUNT_FAILED)
1764 mount_set_state(m, MOUNT_DEAD);
1769 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1770 Mount *m = MOUNT(u);
1772 Set *pid_set = NULL;
1776 if (who == KILL_MAIN) {
1777 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1781 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1782 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1786 if (who == KILL_CONTROL || who == KILL_ALL)
1787 if (m->control_pid > 0)
1788 if (kill(m->control_pid, signo) < 0)
1791 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
1794 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1797 /* Exclude the control pid from being killed via the cgroup */
1798 if (m->control_pid > 0)
1799 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1804 if ((q = cgroup_bonding_kill_list(UNIT(m)->cgroup_bondings, signo, false, pid_set)) < 0)
1805 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
1816 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1817 [MOUNT_DEAD] = "dead",
1818 [MOUNT_MOUNTING] = "mounting",
1819 [MOUNT_MOUNTING_DONE] = "mounting-done",
1820 [MOUNT_MOUNTED] = "mounted",
1821 [MOUNT_REMOUNTING] = "remounting",
1822 [MOUNT_UNMOUNTING] = "unmounting",
1823 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1824 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1825 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1826 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1827 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1828 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1829 [MOUNT_FAILED] = "failed"
1832 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1834 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1835 [MOUNT_EXEC_MOUNT] = "ExecMount",
1836 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1837 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1840 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1842 const UnitVTable mount_vtable = {
1844 .object_size = sizeof(Mount),
1851 .no_instances = true,
1852 .show_status = true,
1858 .coldplug = mount_coldplug,
1862 .start = mount_start,
1864 .reload = mount_reload,
1868 .serialize = mount_serialize,
1869 .deserialize_item = mount_deserialize_item,
1871 .active_state = mount_active_state,
1872 .sub_state_to_string = mount_sub_state_to_string,
1874 .check_gc = mount_check_gc,
1876 .sigchld_event = mount_sigchld_event,
1877 .timer_event = mount_timer_event,
1879 .reset_failed = mount_reset_failed,
1881 .bus_interface = "org.freedesktop.systemd1.Mount",
1882 .bus_message_handler = bus_mount_message_handler,
1883 .bus_invalidating_properties = bus_mount_invalidating_properties,
1885 .enumerate = mount_enumerate,
1886 .shutdown = mount_shutdown