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->meta.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 = EXEC_OUTPUT_KMSG;
74 /* We need to make sure that /bin/mount is always called in
75 * the same process group as us, so that the autofs kernel
76 * side doesn't send us another mount request while we are
77 * already trying to comply its last one. */
78 m->exec_context.same_pgrp = true;
80 m->timer_watch.type = WATCH_INVALID;
82 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
84 m->meta.ignore_on_isolate = true;
87 static void mount_unwatch_control_pid(Mount *m) {
90 if (m->control_pid <= 0)
93 unit_unwatch_pid(UNIT(m), m->control_pid);
97 static void mount_parameters_done(MountParameters *p) {
104 p->what = p->options = p->fstype = NULL;
107 static void mount_done(Unit *u) {
116 /* Try to detach us from the automount unit if there is any */
117 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
118 Automount *a = (Automount*) other;
124 mount_parameters_done(&m->parameters_etc_fstab);
125 mount_parameters_done(&m->parameters_proc_self_mountinfo);
126 mount_parameters_done(&m->parameters_fragment);
128 exec_context_done(&m->exec_context);
129 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
130 m->control_command = NULL;
132 mount_unwatch_control_pid(m);
134 unit_unwatch_timer(u, &m->timer_watch);
137 static MountParameters* get_mount_parameters_configured(Mount *m) {
140 if (m->from_fragment)
141 return &m->parameters_fragment;
142 else if (m->from_etc_fstab)
143 return &m->parameters_etc_fstab;
148 static MountParameters* get_mount_parameters(Mount *m) {
151 if (m->from_proc_self_mountinfo)
152 return &m->parameters_proc_self_mountinfo;
154 return get_mount_parameters_configured(m);
157 static int mount_add_mount_links(Mount *m) {
164 pm = get_mount_parameters_configured(m);
166 /* Adds in links to other mount points that might lie below or
167 * above us in the hierarchy */
169 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
170 Mount *n = (Mount*) other;
176 if (n->meta.load_state != UNIT_LOADED)
179 pn = get_mount_parameters_configured(n);
181 if (path_startswith(m->where, n->where)) {
183 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
187 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
190 } else if (path_startswith(n->where, m->where)) {
192 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
196 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
199 } else if (pm && path_startswith(pm->what, n->where)) {
201 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
204 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
207 } else if (pn && path_startswith(pn->what, m->where)) {
209 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
212 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
220 static int mount_add_swap_links(Mount *m) {
226 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
227 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
233 static int mount_add_path_links(Mount *m) {
239 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
240 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
246 static int mount_add_automount_links(Mount *m) {
252 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
253 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
259 static int mount_add_socket_links(Mount *m) {
265 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
266 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
272 static char* mount_test_option(const char *haystack, const char *needle) {
277 /* Like glibc's hasmntopt(), but works on a string, not a
284 me.mnt_opts = (char*) haystack;
286 return hasmntopt(&me, needle);
289 static bool mount_is_network(MountParameters *p) {
292 if (mount_test_option(p->options, "_netdev"))
295 if (p->fstype && fstype_is_network(p->fstype))
301 static bool mount_is_bind(MountParameters *p) {
304 if (mount_test_option(p->options, "bind"))
307 if (p->fstype && streq(p->fstype, "bind"))
313 static bool needs_quota(MountParameters *p) {
316 if (mount_is_network(p))
319 if (mount_is_bind(p))
322 return mount_test_option(p->options, "usrquota") ||
323 mount_test_option(p->options, "grpquota");
326 static int mount_add_target_links(Mount *m) {
327 const char *target, *after = NULL;
331 bool noauto, nofail, handle, automount;
335 if (!(p = get_mount_parameters_configured(m)))
338 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
339 nofail = !!mount_test_option(p->options, "nofail");
341 mount_test_option(p->options, "comment=systemd.mount") ||
342 mount_test_option(p->options, "x-systemd-mount") ||
343 m->meta.manager->mount_auto;
345 mount_test_option(p->options, "comment=systemd.automount") ||
346 mount_test_option(p->options, "x-systemd-automount");
348 if (mount_is_network(p)) {
349 target = SPECIAL_REMOTE_FS_TARGET;
351 if (m->meta.manager->running_as == MANAGER_SYSTEM)
352 after = SPECIAL_NETWORK_TARGET;
354 target = SPECIAL_LOCAL_FS_TARGET;
356 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
360 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
363 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
366 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
369 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
372 /* Automatically add mount points that aren't natively
373 * configured to local-fs.target */
378 m->meta.manager->running_as == MANAGER_SYSTEM)
379 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
382 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
386 static int mount_add_device_links(Mount *m) {
392 if (!(p = get_mount_parameters_configured(m)))
398 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
401 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
402 nofail = !!mount_test_option(p->options, "nofail");
404 if ((r = unit_add_node_link(UNIT(m), p->what,
406 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
412 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
413 !path_equal(m->where, "/")) {
416 /* Let's add in the fsck service */
418 /* aka SPECIAL_FSCK_SERVICE */
419 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
422 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
423 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
430 SERVICE(fsck)->fsck_passno = p->passno;
432 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
439 static int mount_add_default_dependencies(Mount *m) {
444 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
445 !path_equal(m->where, "/")) {
448 p = get_mount_parameters_configured(m);
450 if (p && needs_quota(p)) {
451 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
452 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
456 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
463 static int mount_fix_timeouts(Mount *m) {
465 const char *timeout = NULL;
474 if (!(p = get_mount_parameters_configured(m)))
477 /* Allow configuration how long we wait for a device that
478 * backs a mount point to show up. This is useful to support
479 * endless device timeouts for devices that show up only after
480 * user input, like crypto devices. */
482 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
484 else if ((timeout = mount_test_option(p->options, "x-systemd-device-timeout")))
489 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
493 r = parse_usec(t, &u);
497 log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout);
501 SET_FOREACH(other, m->meta.dependencies[UNIT_AFTER], i) {
502 if (other->meta.type != UNIT_DEVICE)
505 other->meta.job_timeout = u;
511 static int mount_verify(Mount *m) {
516 if (m->meta.load_state != UNIT_LOADED)
519 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
522 if (!(e = unit_name_from_path(m->where, ".mount")))
525 b = unit_has_name(UNIT(m), e);
529 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
533 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
534 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
538 if (m->meta.fragment_path && !m->parameters_fragment.what) {
539 log_error("%s's What setting is missing. Refusing.", m->meta.id);
543 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
544 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
551 static int mount_load(Unit *u) {
556 assert(u->meta.load_state == UNIT_STUB);
558 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
561 /* This is a new unit? Then let's add in some extras */
562 if (u->meta.load_state == UNIT_LOADED) {
563 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
566 if (m->meta.fragment_path)
567 m->from_fragment = true;
570 if (!(m->where = unit_name_to_path(u->meta.id)))
573 path_kill_slashes(m->where);
575 if (!m->meta.description)
576 if ((r = unit_set_description(u, m->where)) < 0)
579 if ((r = mount_add_device_links(m)) < 0)
582 if ((r = mount_add_mount_links(m)) < 0)
585 if ((r = mount_add_socket_links(m)) < 0)
588 if ((r = mount_add_swap_links(m)) < 0)
591 if ((r = mount_add_path_links(m)) < 0)
594 if ((r = mount_add_automount_links(m)) < 0)
597 if ((r = mount_add_target_links(m)) < 0)
600 if ((r = unit_add_default_cgroups(u)) < 0)
603 if (m->meta.default_dependencies)
604 if ((r = mount_add_default_dependencies(m)) < 0)
607 mount_fix_timeouts(m);
610 return mount_verify(m);
613 static int mount_notify_automount(Mount *m, int status) {
619 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
620 return r == -ENOENT ? 0 : r;
622 return automount_send_ready(AUTOMOUNT(p), status);
625 static void mount_set_state(Mount *m, MountState state) {
626 MountState old_state;
629 old_state = m->state;
632 if (state != MOUNT_MOUNTING &&
633 state != MOUNT_MOUNTING_DONE &&
634 state != MOUNT_REMOUNTING &&
635 state != MOUNT_UNMOUNTING &&
636 state != MOUNT_MOUNTING_SIGTERM &&
637 state != MOUNT_MOUNTING_SIGKILL &&
638 state != MOUNT_UNMOUNTING_SIGTERM &&
639 state != MOUNT_UNMOUNTING_SIGKILL &&
640 state != MOUNT_REMOUNTING_SIGTERM &&
641 state != MOUNT_REMOUNTING_SIGKILL) {
642 unit_unwatch_timer(UNIT(m), &m->timer_watch);
643 mount_unwatch_control_pid(m);
644 m->control_command = NULL;
645 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
648 if (state == MOUNT_MOUNTED ||
649 state == MOUNT_REMOUNTING)
650 mount_notify_automount(m, 0);
651 else if (state == MOUNT_DEAD ||
652 state == MOUNT_UNMOUNTING ||
653 state == MOUNT_MOUNTING_SIGTERM ||
654 state == MOUNT_MOUNTING_SIGKILL ||
655 state == MOUNT_REMOUNTING_SIGTERM ||
656 state == MOUNT_REMOUNTING_SIGKILL ||
657 state == MOUNT_UNMOUNTING_SIGTERM ||
658 state == MOUNT_UNMOUNTING_SIGKILL ||
659 state == MOUNT_FAILED)
660 mount_notify_automount(m, -ENODEV);
662 if (state != old_state)
663 log_debug("%s changed %s -> %s",
665 mount_state_to_string(old_state),
666 mount_state_to_string(state));
668 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
669 m->reload_failure = false;
672 static int mount_coldplug(Unit *u) {
674 MountState new_state = MOUNT_DEAD;
678 assert(m->state == MOUNT_DEAD);
680 if (m->deserialized_state != m->state)
681 new_state = m->deserialized_state;
682 else if (m->from_proc_self_mountinfo)
683 new_state = MOUNT_MOUNTED;
685 if (new_state != m->state) {
687 if (new_state == MOUNT_MOUNTING ||
688 new_state == MOUNT_MOUNTING_DONE ||
689 new_state == MOUNT_REMOUNTING ||
690 new_state == MOUNT_UNMOUNTING ||
691 new_state == MOUNT_MOUNTING_SIGTERM ||
692 new_state == MOUNT_MOUNTING_SIGKILL ||
693 new_state == MOUNT_UNMOUNTING_SIGTERM ||
694 new_state == MOUNT_UNMOUNTING_SIGKILL ||
695 new_state == MOUNT_REMOUNTING_SIGTERM ||
696 new_state == MOUNT_REMOUNTING_SIGKILL) {
698 if (m->control_pid <= 0)
701 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
704 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
708 mount_set_state(m, new_state);
714 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
721 p = get_mount_parameters(m);
724 "%sMount State: %s\n"
727 "%sFile System Type: %s\n"
729 "%sFrom /etc/fstab: %s\n"
730 "%sFrom /proc/self/mountinfo: %s\n"
731 "%sFrom fragment: %s\n"
732 "%sDirectoryMode: %04o\n",
733 prefix, mount_state_to_string(m->state),
735 prefix, strna(p->what),
736 prefix, strna(p->fstype),
737 prefix, strna(p->options),
738 prefix, yes_no(m->from_etc_fstab),
739 prefix, yes_no(m->from_proc_self_mountinfo),
740 prefix, yes_no(m->from_fragment),
741 prefix, m->directory_mode);
743 if (m->control_pid > 0)
745 "%sControl PID: %lu\n",
746 prefix, (unsigned long) m->control_pid);
748 exec_context_dump(&m->exec_context, f, prefix);
751 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
759 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
762 if ((r = exec_spawn(c,
766 m->meta.manager->environment,
770 m->meta.manager->confirm_spawn,
771 m->meta.cgroup_bondings,
775 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
776 /* FIXME: we need to do something here */
784 unit_unwatch_timer(UNIT(m), &m->timer_watch);
789 static void mount_enter_dead(Mount *m, bool success) {
795 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
798 static void mount_enter_mounted(Mount *m, bool success) {
804 mount_set_state(m, MOUNT_MOUNTED);
807 static void mount_enter_signal(Mount *m, MountState state, bool success) {
810 bool wait_for_exit = false;
817 if (m->exec_context.kill_mode != KILL_NONE) {
818 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
819 state == MOUNT_UNMOUNTING_SIGTERM ||
820 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
822 if (m->control_pid > 0) {
823 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
825 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
827 wait_for_exit = true;
830 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
832 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
837 /* Exclude the control pid from being killed via the cgroup */
838 if (m->control_pid > 0)
839 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
842 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
843 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
844 log_warning("Failed to kill control group: %s", strerror(-r));
846 wait_for_exit = true;
854 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
857 mount_set_state(m, state);
858 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
859 mount_enter_mounted(m, true);
861 mount_enter_dead(m, true);
866 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
868 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
869 mount_enter_mounted(m, false);
871 mount_enter_dead(m, false);
877 static void mount_enter_unmounting(Mount *m, bool success) {
885 m->control_command_id = MOUNT_EXEC_UNMOUNT;
886 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
888 if ((r = exec_command_set(
895 mount_unwatch_control_pid(m);
897 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
900 mount_set_state(m, MOUNT_UNMOUNTING);
905 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
906 mount_enter_mounted(m, false);
909 static void mount_enter_mounting(Mount *m) {
915 m->control_command_id = MOUNT_EXEC_MOUNT;
916 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
918 mkdir_p(m->where, m->directory_mode);
920 /* Create the source directory for bind-mounts if needed */
921 p = get_mount_parameters_configured(m);
922 if (p && mount_is_bind(p))
923 mkdir_p(p->what, m->directory_mode);
925 if (m->from_fragment)
926 r = exec_command_set(
929 m->parameters_fragment.what,
931 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
932 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
934 else if (m->from_etc_fstab)
935 r = exec_command_set(
946 mount_unwatch_control_pid(m);
948 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
951 mount_set_state(m, MOUNT_MOUNTING);
956 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
957 mount_enter_dead(m, false);
960 static void mount_enter_mounting_done(Mount *m) {
963 mount_set_state(m, MOUNT_MOUNTING_DONE);
966 static void mount_enter_remounting(Mount *m, bool success) {
974 m->control_command_id = MOUNT_EXEC_REMOUNT;
975 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
977 if (m->from_fragment) {
981 if (m->parameters_fragment.options) {
982 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
991 r = exec_command_set(
994 m->parameters_fragment.what,
996 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1001 } else if (m->from_etc_fstab)
1002 r = exec_command_set(
1014 mount_unwatch_control_pid(m);
1016 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
1019 mount_set_state(m, MOUNT_REMOUNTING);
1024 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
1025 m->reload_failure = true;
1026 mount_enter_mounted(m, true);
1029 static int mount_start(Unit *u) {
1030 Mount *m = MOUNT(u);
1034 /* We cannot fulfill this request right now, try again later
1036 if (m->state == MOUNT_UNMOUNTING ||
1037 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1038 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1039 m->state == MOUNT_MOUNTING_SIGTERM ||
1040 m->state == MOUNT_MOUNTING_SIGKILL)
1043 /* Already on it! */
1044 if (m->state == MOUNT_MOUNTING)
1047 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1050 mount_enter_mounting(m);
1054 static int mount_stop(Unit *u) {
1055 Mount *m = MOUNT(u);
1060 if (m->state == MOUNT_UNMOUNTING ||
1061 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1062 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1063 m->state == MOUNT_MOUNTING_SIGTERM ||
1064 m->state == MOUNT_MOUNTING_SIGKILL)
1067 assert(m->state == MOUNT_MOUNTING ||
1068 m->state == MOUNT_MOUNTING_DONE ||
1069 m->state == MOUNT_MOUNTED ||
1070 m->state == MOUNT_REMOUNTING ||
1071 m->state == MOUNT_REMOUNTING_SIGTERM ||
1072 m->state == MOUNT_REMOUNTING_SIGKILL);
1074 mount_enter_unmounting(m, true);
1078 static int mount_reload(Unit *u) {
1079 Mount *m = MOUNT(u);
1083 if (m->state == MOUNT_MOUNTING_DONE)
1086 assert(m->state == MOUNT_MOUNTED);
1088 mount_enter_remounting(m, true);
1092 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1093 Mount *m = MOUNT(u);
1099 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1100 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1102 if (m->control_pid > 0)
1103 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1105 if (m->control_command_id >= 0)
1106 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1111 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1112 Mount *m = MOUNT(u);
1119 if (streq(key, "state")) {
1122 if ((state = mount_state_from_string(value)) < 0)
1123 log_debug("Failed to parse state value %s", value);
1125 m->deserialized_state = state;
1126 } else if (streq(key, "failure")) {
1129 if ((b = parse_boolean(value)) < 0)
1130 log_debug("Failed to parse failure value %s", value);
1132 m->failure = b || m->failure;
1134 } else if (streq(key, "control-pid")) {
1137 if (parse_pid(value, &pid) < 0)
1138 log_debug("Failed to parse control-pid value %s", value);
1140 m->control_pid = pid;
1141 } else if (streq(key, "control-command")) {
1142 MountExecCommand id;
1144 if ((id = mount_exec_command_from_string(value)) < 0)
1145 log_debug("Failed to parse exec-command value %s", value);
1147 m->control_command_id = id;
1148 m->control_command = m->exec_command + id;
1152 log_debug("Unknown serialization key '%s'", key);
1157 static UnitActiveState mount_active_state(Unit *u) {
1160 return state_translation_table[MOUNT(u)->state];
1163 static const char *mount_sub_state_to_string(Unit *u) {
1166 return mount_state_to_string(MOUNT(u)->state);
1169 static bool mount_check_gc(Unit *u) {
1170 Mount *m = MOUNT(u);
1174 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1177 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1178 Mount *m = MOUNT(u);
1184 if (pid != m->control_pid)
1189 success = is_clean_exit(code, status);
1190 m->failure = m->failure || !success;
1192 if (m->control_command) {
1193 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1194 m->control_command = NULL;
1195 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1198 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1199 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1201 /* Note that mount(8) returning and the kernel sending us a
1202 * mount table change event might happen out-of-order. If an
1203 * operation succeed we assume the kernel will follow soon too
1204 * and already change into the resulting state. If it fails
1205 * we check if the kernel still knows about the mount. and
1206 * change state accordingly. */
1210 case MOUNT_MOUNTING:
1211 case MOUNT_MOUNTING_DONE:
1212 case MOUNT_MOUNTING_SIGKILL:
1213 case MOUNT_MOUNTING_SIGTERM:
1216 mount_enter_mounted(m, true);
1217 else if (m->from_proc_self_mountinfo)
1218 mount_enter_mounted(m, false);
1220 mount_enter_dead(m, false);
1223 case MOUNT_REMOUNTING:
1224 case MOUNT_REMOUNTING_SIGKILL:
1225 case MOUNT_REMOUNTING_SIGTERM:
1227 m->reload_failure = !success;
1228 if (m->from_proc_self_mountinfo)
1229 mount_enter_mounted(m, true);
1231 mount_enter_dead(m, true);
1235 case MOUNT_UNMOUNTING:
1236 case MOUNT_UNMOUNTING_SIGKILL:
1237 case MOUNT_UNMOUNTING_SIGTERM:
1240 mount_enter_dead(m, true);
1241 else if (m->from_proc_self_mountinfo)
1242 mount_enter_mounted(m, false);
1244 mount_enter_dead(m, false);
1248 assert_not_reached("Uh, control process died at wrong time.");
1251 /* Notify clients about changed exit status */
1252 unit_add_to_dbus_queue(u);
1255 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1256 Mount *m = MOUNT(u);
1259 assert(elapsed == 1);
1260 assert(w == &m->timer_watch);
1264 case MOUNT_MOUNTING:
1265 case MOUNT_MOUNTING_DONE:
1266 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1267 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1270 case MOUNT_REMOUNTING:
1271 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1272 m->reload_failure = true;
1273 mount_enter_mounted(m, true);
1276 case MOUNT_UNMOUNTING:
1277 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1278 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1281 case MOUNT_MOUNTING_SIGTERM:
1282 if (m->exec_context.send_sigkill) {
1283 log_warning("%s mounting timed out. Killing.", u->meta.id);
1284 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1286 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1288 if (m->from_proc_self_mountinfo)
1289 mount_enter_mounted(m, false);
1291 mount_enter_dead(m, false);
1295 case MOUNT_REMOUNTING_SIGTERM:
1296 if (m->exec_context.send_sigkill) {
1297 log_warning("%s remounting timed out. Killing.", u->meta.id);
1298 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1300 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1302 if (m->from_proc_self_mountinfo)
1303 mount_enter_mounted(m, false);
1305 mount_enter_dead(m, false);
1309 case MOUNT_UNMOUNTING_SIGTERM:
1310 if (m->exec_context.send_sigkill) {
1311 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1312 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1314 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1316 if (m->from_proc_self_mountinfo)
1317 mount_enter_mounted(m, false);
1319 mount_enter_dead(m, false);
1323 case MOUNT_MOUNTING_SIGKILL:
1324 case MOUNT_REMOUNTING_SIGKILL:
1325 case MOUNT_UNMOUNTING_SIGKILL:
1326 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1328 if (m->from_proc_self_mountinfo)
1329 mount_enter_mounted(m, false);
1331 mount_enter_dead(m, false);
1335 assert_not_reached("Timeout at wrong time.");
1339 static int mount_add_one(
1343 const char *options,
1346 bool from_proc_self_mountinfo,
1351 char *e, *w = NULL, *o = NULL, *f = NULL;
1360 assert(!set_flags || from_proc_self_mountinfo);
1362 /* Ignore API mount points. They should never be referenced in
1363 * dependencies ever. */
1364 if (mount_point_is_api(where) || mount_point_ignore(where))
1367 if (streq(fstype, "autofs"))
1370 /* probably some kind of swap, ignore */
1371 if (!is_path(where))
1374 if (!(e = unit_name_from_path(where, ".mount")))
1377 if (!(u = manager_get_unit(m, e))) {
1380 if (!(u = unit_new(m))) {
1385 r = unit_add_name(u, e);
1391 if (!(MOUNT(u)->where = strdup(where))) {
1396 unit_add_to_load_queue(u);
1402 if (!(w = strdup(what)) ||
1403 !(o = strdup(options)) ||
1404 !(f = strdup(fstype))) {
1409 if (from_proc_self_mountinfo) {
1410 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1413 MOUNT(u)->is_mounted = true;
1414 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1415 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1418 MOUNT(u)->from_proc_self_mountinfo = true;
1420 p = &MOUNT(u)->parameters_etc_fstab;
1421 MOUNT(u)->from_etc_fstab = true;
1435 unit_add_to_dbus_queue(u);
1450 static int mount_find_pri(char *options) {
1454 if (!(pri = mount_test_option(options, "pri=")))
1460 r = strtoul(pri, &end, 10);
1465 if (end == pri || (*end != ',' && *end != 0))
1471 static int mount_load_etc_fstab(Manager *m) {
1479 if (!(f = setmntent("/etc/fstab", "r")))
1482 while ((me = getmntent(f))) {
1486 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1491 if (!(where = strdup(me->mnt_dir))) {
1498 path_kill_slashes(what);
1500 if (where[0] == '/')
1501 path_kill_slashes(where);
1503 if (streq(me->mnt_type, "swap")) {
1506 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1513 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1514 !!mount_test_option(me->mnt_opts, "nofail"),
1515 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1518 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1533 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1536 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1540 rewind(m->proc_self_mountinfo);
1545 device = path = options = options2 = fstype = d = p = o = NULL;
1547 if ((k = fscanf(m->proc_self_mountinfo,
1548 "%*s " /* (1) mount id */
1549 "%*s " /* (2) parent id */
1550 "%*s " /* (3) major:minor */
1551 "%*s " /* (4) root */
1552 "%ms " /* (5) mount point */
1553 "%ms" /* (6) mount options */
1554 "%*[^-]" /* (7) optional fields */
1555 "- " /* (8) separator */
1556 "%ms " /* (9) file system type */
1557 "%ms" /* (10) mount source */
1558 "%ms" /* (11) mount options 2 */
1559 "%*[^\n]", /* some rubbish at the end */
1569 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1573 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1578 if (!(d = cunescape(device)) ||
1579 !(p = cunescape(path))) {
1584 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1611 static void mount_shutdown(Manager *m) {
1614 if (m->proc_self_mountinfo) {
1615 fclose(m->proc_self_mountinfo);
1616 m->proc_self_mountinfo = NULL;
1620 static int mount_enumerate(Manager *m) {
1622 struct epoll_event ev;
1625 if (!m->proc_self_mountinfo) {
1626 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1629 m->mount_watch.type = WATCH_MOUNT;
1630 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1633 ev.events = EPOLLPRI;
1634 ev.data.ptr = &m->mount_watch;
1636 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1640 if ((r = mount_load_etc_fstab(m)) < 0)
1643 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1653 void mount_fd_event(Manager *m, int events) {
1658 assert(events & EPOLLPRI);
1660 /* The manager calls this for every fd event happening on the
1661 * /proc/self/mountinfo file, which informs us about mounting
1664 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1665 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1667 /* Reset flags, just in case, for later calls */
1668 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1669 Mount *mount = (Mount*) meta;
1671 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1677 manager_dispatch_load_queue(m);
1679 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1680 Mount *mount = (Mount*) meta;
1682 if (!mount->is_mounted) {
1683 /* This has just been unmounted. */
1685 mount->from_proc_self_mountinfo = false;
1687 switch (mount->state) {
1690 mount_enter_dead(mount, true);
1694 mount_set_state(mount, mount->state);
1699 } else if (mount->just_mounted || mount->just_changed) {
1701 /* New or changed mount entry */
1703 switch (mount->state) {
1707 mount_enter_mounted(mount, true);
1710 case MOUNT_MOUNTING:
1711 mount_enter_mounting_done(mount);
1715 /* Nothing really changed, but let's
1716 * issue an notification call
1717 * nonetheless, in case somebody is
1718 * waiting for this. (e.g. file system
1719 * ro/rw remounts.) */
1720 mount_set_state(mount, mount->state);
1725 /* Reset the flags for later calls */
1726 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1730 static void mount_reset_failed(Unit *u) {
1731 Mount *m = MOUNT(u);
1735 if (m->state == MOUNT_FAILED)
1736 mount_set_state(m, MOUNT_DEAD);
1741 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1742 Mount *m = MOUNT(u);
1744 Set *pid_set = NULL;
1748 if (who == KILL_MAIN) {
1749 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1753 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1754 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1758 if (m->control_pid > 0)
1759 if (kill(m->control_pid, signo) < 0)
1762 if (mode == KILL_CONTROL_GROUP) {
1765 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1768 /* Exclude the control pid from being killed via the cgroup */
1769 if (m->control_pid > 0)
1770 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1775 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1776 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1787 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1788 [MOUNT_DEAD] = "dead",
1789 [MOUNT_MOUNTING] = "mounting",
1790 [MOUNT_MOUNTING_DONE] = "mounting-done",
1791 [MOUNT_MOUNTED] = "mounted",
1792 [MOUNT_REMOUNTING] = "remounting",
1793 [MOUNT_UNMOUNTING] = "unmounting",
1794 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1795 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1796 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1797 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1798 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1799 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1800 [MOUNT_FAILED] = "failed"
1803 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1805 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1806 [MOUNT_EXEC_MOUNT] = "ExecMount",
1807 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1808 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1811 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1813 const UnitVTable mount_vtable = {
1817 .no_instances = true,
1818 .show_status = true,
1824 .coldplug = mount_coldplug,
1828 .start = mount_start,
1830 .reload = mount_reload,
1834 .serialize = mount_serialize,
1835 .deserialize_item = mount_deserialize_item,
1837 .active_state = mount_active_state,
1838 .sub_state_to_string = mount_sub_state_to_string,
1840 .check_gc = mount_check_gc,
1842 .sigchld_event = mount_sigchld_event,
1843 .timer_event = mount_timer_event,
1845 .reset_failed = mount_reset_failed,
1847 .bus_interface = "org.freedesktop.systemd1.Mount",
1848 .bus_message_handler = bus_mount_message_handler,
1849 .bus_invalidating_properties = bus_mount_invalidating_properties,
1851 .enumerate = mount_enumerate,
1852 .shutdown = mount_shutdown