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 Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/epoll.h>
31 #include "load-fragment.h"
32 #include "load-dropin.h"
34 #include "sd-messages.h"
37 #include "path-util.h"
38 #include "mount-setup.h"
39 #include "unit-name.h"
40 #include "dbus-mount.h"
42 #include "bus-errors.h"
43 #include "exit-status.h"
46 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
47 [MOUNT_DEAD] = UNIT_INACTIVE,
48 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
49 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
50 [MOUNT_MOUNTED] = UNIT_ACTIVE,
51 [MOUNT_REMOUNTING] = UNIT_RELOADING,
52 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
53 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
54 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
55 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
56 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
57 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
58 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
59 [MOUNT_FAILED] = UNIT_FAILED
62 static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
63 static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
65 static char* mount_test_option(const char *haystack, const char *needle) {
66 struct mntent me = { .mnt_opts = (char*) haystack };
70 /* Like glibc's hasmntopt(), but works on a string, not a
76 return hasmntopt(&me, needle);
79 static bool mount_is_network(MountParameters *p) {
82 if (mount_test_option(p->options, "_netdev"))
85 if (p->fstype && fstype_is_network(p->fstype))
91 static bool mount_is_bind(MountParameters *p) {
94 if (mount_test_option(p->options, "bind"))
97 if (p->fstype && streq(p->fstype, "bind"))
100 if (mount_test_option(p->options, "rbind"))
103 if (p->fstype && streq(p->fstype, "rbind"))
109 static bool mount_is_auto(MountParameters *p) {
112 return !mount_test_option(p->options, "noauto");
115 static bool needs_quota(MountParameters *p) {
118 if (mount_is_network(p))
121 if (mount_is_bind(p))
124 return mount_test_option(p->options, "usrquota") ||
125 mount_test_option(p->options, "grpquota") ||
126 mount_test_option(p->options, "quota") ||
127 mount_test_option(p->options, "usrjquota") ||
128 mount_test_option(p->options, "grpjquota");
131 static void mount_init(Unit *u) {
135 assert(u->load_state == UNIT_STUB);
137 m->timeout_usec = u->manager->default_timeout_start_usec;
138 m->directory_mode = 0755;
140 exec_context_init(&m->exec_context);
141 kill_context_init(&m->kill_context);
142 cgroup_context_init(&m->cgroup_context);
144 if (unit_has_name(u, "-.mount")) {
145 /* Don't allow start/stop for root directory */
146 u->refuse_manual_start = true;
147 u->refuse_manual_stop = true;
149 /* The stdio/kmsg bridge socket is on /, in order to avoid a
150 * dep loop, don't use kmsg logging for -.mount */
151 m->exec_context.std_output = u->manager->default_std_output;
152 m->exec_context.std_error = u->manager->default_std_error;
155 /* We need to make sure that /bin/mount is always called in
156 * the same process group as us, so that the autofs kernel
157 * side doesn't send us another mount request while we are
158 * already trying to comply its last one. */
159 m->exec_context.same_pgrp = true;
161 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
163 u->ignore_on_isolate = true;
166 static int mount_arm_timer(Mount *m) {
171 if (m->timeout_usec <= 0) {
172 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
176 if (m->timer_event_source) {
177 r = sd_event_source_set_time(m->timer_event_source, now(CLOCK_MONOTONIC) + m->timeout_usec);
181 return sd_event_source_set_enabled(m->timer_event_source, SD_EVENT_ONESHOT);
184 return sd_event_add_monotonic(UNIT(m)->manager->event, now(CLOCK_MONOTONIC) + m->timeout_usec, 0, mount_dispatch_timer, m, &m->timer_event_source);
187 static void mount_unwatch_control_pid(Mount *m) {
190 if (m->control_pid <= 0)
193 unit_unwatch_pid(UNIT(m), m->control_pid);
197 static void mount_parameters_done(MountParameters *p) {
204 p->what = p->options = p->fstype = NULL;
207 static void mount_done(Unit *u) {
215 mount_parameters_done(&m->parameters_proc_self_mountinfo);
216 mount_parameters_done(&m->parameters_fragment);
218 cgroup_context_done(&m->cgroup_context);
219 exec_context_done(&m->exec_context);
220 m->exec_runtime = exec_runtime_unref(m->exec_runtime);
221 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
222 m->control_command = NULL;
224 mount_unwatch_control_pid(m);
226 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
229 _pure_ static MountParameters* get_mount_parameters_fragment(Mount *m) {
232 if (m->from_fragment)
233 return &m->parameters_fragment;
238 _pure_ static MountParameters* get_mount_parameters(Mount *m) {
241 if (m->from_proc_self_mountinfo)
242 return &m->parameters_proc_self_mountinfo;
244 return get_mount_parameters_fragment(m);
247 static int mount_add_mount_links(Mount *m) {
248 _cleanup_free_ char *parent = NULL;
257 if (!path_equal(m->where, "/")) {
258 /* Adds in links to other mount points that might lie further
259 * up in the hierarchy */
260 r = path_get_parent(m->where, &parent);
264 r = unit_require_mounts_for(UNIT(m), parent);
269 /* Adds in links to other mount points that might be needed
270 * for the source path (if this is a bind mount) to be
272 pm = get_mount_parameters_fragment(m);
273 if (pm && pm->what &&
274 path_is_absolute(pm->what) &&
275 !mount_is_network(pm)) {
277 r = unit_require_mounts_for(UNIT(m), pm->what);
282 /* Adds in links to other units that use this path or paths
283 * further down in the hierarchy */
284 s = manager_get_units_requiring_mounts_for(UNIT(m)->manager, m->where);
285 SET_FOREACH(other, s, i) {
287 if (other->load_state != UNIT_LOADED)
290 if (other == UNIT(m))
293 r = unit_add_dependency(other, UNIT_AFTER, UNIT(m), true);
297 if (UNIT(m)->fragment_path) {
298 /* If we have fragment configuration, then make this dependency required */
299 r = unit_add_dependency(other, UNIT_REQUIRES, UNIT(m), true);
308 static int mount_add_device_links(Mount *m) {
310 bool device_wants_mount = false;
315 p = get_mount_parameters_fragment(m);
322 if (mount_is_bind(p))
325 if (!is_device_path(p->what))
328 if (path_equal(m->where, "/"))
331 if (mount_is_auto(p) && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM)
332 device_wants_mount = true;
334 r = unit_add_node_link(UNIT(m), p->what, device_wants_mount);
341 static int mount_add_quota_links(Mount *m) {
347 if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM)
350 p = get_mount_parameters_fragment(m);
357 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true);
361 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true);
368 static bool should_umount(Mount *m) {
371 if (path_equal(m->where, "/") ||
372 path_equal(m->where, "/usr"))
375 p = get_mount_parameters(m);
376 if (p && mount_test_option(p->options, "x-initrd.mount") &&
383 static int mount_add_default_dependencies(Mount *m) {
384 const char *after, *after2, *online;
390 if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM)
393 p = get_mount_parameters(m);
398 if (path_equal(m->where, "/"))
401 if (mount_is_network(p)) {
402 after = SPECIAL_REMOTE_FS_PRE_TARGET;
403 after2 = SPECIAL_NETWORK_TARGET;
404 online = SPECIAL_NETWORK_ONLINE_TARGET;
406 after = SPECIAL_LOCAL_FS_PRE_TARGET;
411 r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true);
416 r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true);
422 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, online, NULL, true);
427 if (should_umount(m)) {
428 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
436 static int mount_fix_timeouts(Mount *m) {
438 const char *timeout = NULL;
447 p = get_mount_parameters_fragment(m);
451 /* Allow configuration how long we wait for a device that
452 * backs a mount point to show up. This is useful to support
453 * endless device timeouts for devices that show up only after
454 * user input, like crypto devices. */
456 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
458 else if ((timeout = mount_test_option(p->options, "x-systemd.device-timeout")))
463 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
467 r = parse_sec(t, &u);
471 log_warning_unit(UNIT(m)->id,
472 "Failed to parse timeout for %s, ignoring: %s",
477 SET_FOREACH(other, UNIT(m)->dependencies[UNIT_AFTER], i) {
478 if (other->type != UNIT_DEVICE)
481 other->job_timeout = u;
487 static int mount_verify(Mount *m) {
488 _cleanup_free_ char *e = NULL;
493 if (UNIT(m)->load_state != UNIT_LOADED)
496 if (!m->from_fragment && !m->from_proc_self_mountinfo)
499 e = unit_name_from_path(m->where, ".mount");
503 b = unit_has_name(UNIT(m), e);
505 log_error_unit(UNIT(m)->id, "%s's Where= setting doesn't match unit name. Refusing.", UNIT(m)->id);
509 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
510 log_error_unit(UNIT(m)->id, "Cannot create mount unit for API file system %s. Refusing.", m->where);
514 if (UNIT(m)->fragment_path && !m->parameters_fragment.what) {
515 log_error_unit(UNIT(m)->id, "%s's What setting is missing. Refusing.", UNIT(m)->id);
519 if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) {
520 log_error_unit(UNIT(m)->id, "%s has PAM enabled. Kill mode must be set to control-group'. Refusing.",UNIT(m)->id);
527 static int mount_add_extras(Mount *m) {
533 if (u->fragment_path)
534 m->from_fragment = true;
537 m->where = unit_name_to_path(u->id);
542 path_kill_slashes(m->where);
544 r = unit_add_exec_dependencies(u, &m->exec_context);
548 if (!u->description) {
549 r = unit_set_description(u, m->where);
554 r = mount_add_device_links(m);
558 r = mount_add_mount_links(m);
562 r = mount_add_quota_links(m);
566 if (u->default_dependencies) {
567 r = mount_add_default_dependencies(m);
572 r = unit_add_default_slice(u);
576 r = mount_fix_timeouts(m);
580 r = unit_exec_context_defaults(u, &m->exec_context);
587 static int mount_load(Unit *u) {
592 assert(u->load_state == UNIT_STUB);
594 if (m->from_proc_self_mountinfo)
595 r = unit_load_fragment_and_dropin_optional(u);
597 r = unit_load_fragment_and_dropin(u);
602 /* This is a new unit? Then let's add in some extras */
603 if (u->load_state == UNIT_LOADED) {
604 r = mount_add_extras(m);
609 return mount_verify(m);
612 static int mount_notify_automount(Mount *m, int status) {
619 SET_FOREACH(p, UNIT(m)->dependencies[UNIT_TRIGGERED_BY], i)
620 if (p->type == UNIT_AUTOMOUNT) {
621 r = automount_send_ready(AUTOMOUNT(p), status);
629 static void mount_set_state(Mount *m, MountState state) {
630 MountState old_state;
633 old_state = m->state;
636 if (state != MOUNT_MOUNTING &&
637 state != MOUNT_MOUNTING_DONE &&
638 state != MOUNT_REMOUNTING &&
639 state != MOUNT_UNMOUNTING &&
640 state != MOUNT_MOUNTING_SIGTERM &&
641 state != MOUNT_MOUNTING_SIGKILL &&
642 state != MOUNT_UNMOUNTING_SIGTERM &&
643 state != MOUNT_UNMOUNTING_SIGKILL &&
644 state != MOUNT_REMOUNTING_SIGTERM &&
645 state != MOUNT_REMOUNTING_SIGKILL) {
646 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
647 mount_unwatch_control_pid(m);
648 m->control_command = NULL;
649 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
652 if (state == MOUNT_MOUNTED ||
653 state == MOUNT_REMOUNTING)
654 mount_notify_automount(m, 0);
655 else if (state == MOUNT_DEAD ||
656 state == MOUNT_UNMOUNTING ||
657 state == MOUNT_MOUNTING_SIGTERM ||
658 state == MOUNT_MOUNTING_SIGKILL ||
659 state == MOUNT_REMOUNTING_SIGTERM ||
660 state == MOUNT_REMOUNTING_SIGKILL ||
661 state == MOUNT_UNMOUNTING_SIGTERM ||
662 state == MOUNT_UNMOUNTING_SIGKILL ||
663 state == MOUNT_FAILED) {
664 if (state != old_state)
665 mount_notify_automount(m, -ENODEV);
668 if (state != old_state)
669 log_debug_unit(UNIT(m)->id,
670 "%s changed %s -> %s",
672 mount_state_to_string(old_state),
673 mount_state_to_string(state));
675 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], m->reload_result == MOUNT_SUCCESS);
676 m->reload_result = MOUNT_SUCCESS;
679 static int mount_coldplug(Unit *u) {
681 MountState new_state = MOUNT_DEAD;
685 assert(m->state == MOUNT_DEAD);
687 if (m->deserialized_state != m->state)
688 new_state = m->deserialized_state;
689 else if (m->from_proc_self_mountinfo)
690 new_state = MOUNT_MOUNTED;
692 if (new_state == m->state)
695 if (new_state == MOUNT_MOUNTING ||
696 new_state == MOUNT_MOUNTING_DONE ||
697 new_state == MOUNT_REMOUNTING ||
698 new_state == MOUNT_UNMOUNTING ||
699 new_state == MOUNT_MOUNTING_SIGTERM ||
700 new_state == MOUNT_MOUNTING_SIGKILL ||
701 new_state == MOUNT_UNMOUNTING_SIGTERM ||
702 new_state == MOUNT_UNMOUNTING_SIGKILL ||
703 new_state == MOUNT_REMOUNTING_SIGTERM ||
704 new_state == MOUNT_REMOUNTING_SIGKILL) {
706 if (m->control_pid <= 0)
709 r = unit_watch_pid(UNIT(m), m->control_pid);
713 r = mount_arm_timer(m);
718 mount_set_state(m, new_state);
722 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
729 p = get_mount_parameters(m);
732 "%sMount State: %s\n"
736 "%sFile System Type: %s\n"
738 "%sFrom /proc/self/mountinfo: %s\n"
739 "%sFrom fragment: %s\n"
740 "%sDirectoryMode: %04o\n",
741 prefix, mount_state_to_string(m->state),
742 prefix, mount_result_to_string(m->result),
744 prefix, p ? strna(p->what) : "n/a",
745 prefix, p ? strna(p->fstype) : "n/a",
746 prefix, p ? strna(p->options) : "n/a",
747 prefix, yes_no(m->from_proc_self_mountinfo),
748 prefix, yes_no(m->from_fragment),
749 prefix, m->directory_mode);
751 if (m->control_pid > 0)
753 "%sControl PID: %lu\n",
754 prefix, (unsigned long) m->control_pid);
756 exec_context_dump(&m->exec_context, f, prefix);
757 kill_context_dump(&m->kill_context, f, prefix);
760 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
768 unit_realize_cgroup(UNIT(m));
770 r = unit_setup_exec_runtime(UNIT(m));
774 r = mount_arm_timer(m);
782 UNIT(m)->manager->environment,
786 UNIT(m)->manager->confirm_spawn,
787 UNIT(m)->manager->cgroup_supported,
788 UNIT(m)->cgroup_path,
796 r = unit_watch_pid(UNIT(m), pid);
798 /* FIXME: we need to do something here */
806 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
811 static void mount_enter_dead(Mount *m, MountResult f) {
814 if (f != MOUNT_SUCCESS)
817 exec_runtime_destroy(m->exec_runtime);
818 m->exec_runtime = exec_runtime_unref(m->exec_runtime);
820 mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD);
823 static void mount_enter_mounted(Mount *m, MountResult f) {
826 if (f != MOUNT_SUCCESS)
829 mount_set_state(m, MOUNT_MOUNTED);
832 static void mount_enter_signal(Mount *m, MountState state, MountResult f) {
837 if (f != MOUNT_SUCCESS)
840 r = unit_kill_context(
843 state != MOUNT_MOUNTING_SIGTERM && state != MOUNT_UNMOUNTING_SIGTERM && state != MOUNT_REMOUNTING_SIGTERM,
851 r = mount_arm_timer(m);
855 mount_set_state(m, state);
856 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
857 mount_enter_mounted(m, MOUNT_SUCCESS);
859 mount_enter_dead(m, MOUNT_SUCCESS);
864 log_warning_unit(UNIT(m)->id,
865 "%s failed to kill processes: %s", UNIT(m)->id, strerror(-r));
867 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
868 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
870 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
873 void warn_if_dir_nonempty(const char *unit, const char* where) {
877 if (dir_is_empty(where) > 0)
880 log_struct_unit(LOG_NOTICE,
882 "MESSAGE=%s: Directory %s to mount over is not empty, mounting anyway.",
885 MESSAGE_ID(SD_MESSAGE_OVERMOUNTING),
889 static void mount_enter_unmounting(Mount *m) {
894 m->control_command_id = MOUNT_EXEC_UNMOUNT;
895 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
897 if ((r = exec_command_set(
904 mount_unwatch_control_pid(m);
906 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
909 mount_set_state(m, MOUNT_UNMOUNTING);
914 log_warning_unit(UNIT(m)->id,
915 "%s failed to run 'umount' task: %s",
916 UNIT(m)->id, strerror(-r));
917 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
920 static void mount_enter_mounting(Mount *m) {
926 m->control_command_id = MOUNT_EXEC_MOUNT;
927 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
929 mkdir_p_label(m->where, m->directory_mode);
931 warn_if_dir_nonempty(m->meta.id, m->where);
933 /* Create the source directory for bind-mounts if needed */
934 p = get_mount_parameters_fragment(m);
935 if (p && mount_is_bind(p))
936 mkdir_p_label(p->what, m->directory_mode);
938 if (m->from_fragment)
939 r = exec_command_set(
942 m->parameters_fragment.what,
944 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
945 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
953 mount_unwatch_control_pid(m);
955 r = mount_spawn(m, m->control_command, &m->control_pid);
959 mount_set_state(m, MOUNT_MOUNTING);
964 log_warning_unit(UNIT(m)->id,
965 "%s failed to run 'mount' task: %s",
966 UNIT(m)->id, strerror(-r));
967 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
970 static void mount_enter_remounting(Mount *m) {
975 m->control_command_id = MOUNT_EXEC_REMOUNT;
976 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
978 if (m->from_fragment) {
981 if (m->parameters_fragment.options)
982 o = strappenda("remount,", m->parameters_fragment.options);
986 r = exec_command_set(
989 m->parameters_fragment.what,
991 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1000 mount_unwatch_control_pid(m);
1002 r = mount_spawn(m, m->control_command, &m->control_pid);
1006 mount_set_state(m, MOUNT_REMOUNTING);
1011 log_warning_unit(UNIT(m)->id,
1012 "%s failed to run 'remount' task: %s",
1013 UNIT(m)->id, strerror(-r));
1014 m->reload_result = MOUNT_FAILURE_RESOURCES;
1015 mount_enter_mounted(m, MOUNT_SUCCESS);
1018 static int mount_start(Unit *u) {
1019 Mount *m = MOUNT(u);
1023 /* We cannot fulfill this request right now, try again later
1025 if (m->state == MOUNT_UNMOUNTING ||
1026 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1027 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1028 m->state == MOUNT_MOUNTING_SIGTERM ||
1029 m->state == MOUNT_MOUNTING_SIGKILL)
1032 /* Already on it! */
1033 if (m->state == MOUNT_MOUNTING)
1036 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1038 m->result = MOUNT_SUCCESS;
1039 m->reload_result = MOUNT_SUCCESS;
1041 mount_enter_mounting(m);
1045 static int mount_stop(Unit *u) {
1046 Mount *m = MOUNT(u);
1051 if (m->state == MOUNT_UNMOUNTING ||
1052 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1053 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1054 m->state == MOUNT_MOUNTING_SIGTERM ||
1055 m->state == MOUNT_MOUNTING_SIGKILL)
1058 assert(m->state == MOUNT_MOUNTING ||
1059 m->state == MOUNT_MOUNTING_DONE ||
1060 m->state == MOUNT_MOUNTED ||
1061 m->state == MOUNT_REMOUNTING ||
1062 m->state == MOUNT_REMOUNTING_SIGTERM ||
1063 m->state == MOUNT_REMOUNTING_SIGKILL);
1065 mount_enter_unmounting(m);
1069 static int mount_reload(Unit *u) {
1070 Mount *m = MOUNT(u);
1074 if (m->state == MOUNT_MOUNTING_DONE)
1077 assert(m->state == MOUNT_MOUNTED);
1079 mount_enter_remounting(m);
1083 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1084 Mount *m = MOUNT(u);
1090 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1091 unit_serialize_item(u, f, "result", mount_result_to_string(m->result));
1092 unit_serialize_item(u, f, "reload-result", mount_result_to_string(m->reload_result));
1094 if (m->control_pid > 0)
1095 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1097 if (m->control_command_id >= 0)
1098 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1103 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1104 Mount *m = MOUNT(u);
1111 if (streq(key, "state")) {
1114 if ((state = mount_state_from_string(value)) < 0)
1115 log_debug_unit(u->id, "Failed to parse state value %s", value);
1117 m->deserialized_state = state;
1118 } else if (streq(key, "result")) {
1121 f = mount_result_from_string(value);
1123 log_debug_unit(UNIT(m)->id,
1124 "Failed to parse result value %s", value);
1125 else if (f != MOUNT_SUCCESS)
1128 } else if (streq(key, "reload-result")) {
1131 f = mount_result_from_string(value);
1133 log_debug_unit(UNIT(m)->id,
1134 "Failed to parse reload result value %s", value);
1135 else if (f != MOUNT_SUCCESS)
1136 m->reload_result = f;
1138 } else if (streq(key, "control-pid")) {
1141 if (parse_pid(value, &pid) < 0)
1142 log_debug_unit(UNIT(m)->id,
1143 "Failed to parse control-pid value %s", value);
1145 m->control_pid = pid;
1146 } else if (streq(key, "control-command")) {
1147 MountExecCommand id;
1149 if ((id = mount_exec_command_from_string(value)) < 0)
1150 log_debug_unit(UNIT(m)->id,
1151 "Failed to parse exec-command value %s", value);
1153 m->control_command_id = id;
1154 m->control_command = m->exec_command + id;
1157 log_debug_unit(UNIT(m)->id,
1158 "Unknown serialization key '%s'", key);
1163 _pure_ static UnitActiveState mount_active_state(Unit *u) {
1166 return state_translation_table[MOUNT(u)->state];
1169 _pure_ static const char *mount_sub_state_to_string(Unit *u) {
1172 return mount_state_to_string(MOUNT(u)->state);
1175 _pure_ static bool mount_check_gc(Unit *u) {
1176 Mount *m = MOUNT(u);
1180 return m->from_proc_self_mountinfo;
1183 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1184 Mount *m = MOUNT(u);
1190 if (pid != m->control_pid)
1195 if (is_clean_exit(code, status, NULL))
1197 else if (code == CLD_EXITED)
1198 f = MOUNT_FAILURE_EXIT_CODE;
1199 else if (code == CLD_KILLED)
1200 f = MOUNT_FAILURE_SIGNAL;
1201 else if (code == CLD_DUMPED)
1202 f = MOUNT_FAILURE_CORE_DUMP;
1204 assert_not_reached("Unknown code");
1206 if (f != MOUNT_SUCCESS)
1209 if (m->control_command) {
1210 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1212 m->control_command = NULL;
1213 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1216 log_full_unit(f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
1217 "%s mount process exited, code=%s status=%i",
1218 u->id, sigchld_code_to_string(code), status);
1220 /* Note that mount(8) returning and the kernel sending us a
1221 * mount table change event might happen out-of-order. If an
1222 * operation succeed we assume the kernel will follow soon too
1223 * and already change into the resulting state. If it fails
1224 * we check if the kernel still knows about the mount. and
1225 * change state accordingly. */
1229 case MOUNT_MOUNTING:
1230 case MOUNT_MOUNTING_DONE:
1231 case MOUNT_MOUNTING_SIGKILL:
1232 case MOUNT_MOUNTING_SIGTERM:
1234 if (f == MOUNT_SUCCESS)
1235 mount_enter_mounted(m, f);
1236 else if (m->from_proc_self_mountinfo)
1237 mount_enter_mounted(m, f);
1239 mount_enter_dead(m, f);
1242 case MOUNT_REMOUNTING:
1243 case MOUNT_REMOUNTING_SIGKILL:
1244 case MOUNT_REMOUNTING_SIGTERM:
1246 m->reload_result = f;
1247 if (m->from_proc_self_mountinfo)
1248 mount_enter_mounted(m, MOUNT_SUCCESS);
1250 mount_enter_dead(m, MOUNT_SUCCESS);
1254 case MOUNT_UNMOUNTING:
1255 case MOUNT_UNMOUNTING_SIGKILL:
1256 case MOUNT_UNMOUNTING_SIGTERM:
1258 if (f == MOUNT_SUCCESS)
1259 mount_enter_dead(m, f);
1260 else if (m->from_proc_self_mountinfo)
1261 mount_enter_mounted(m, f);
1263 mount_enter_dead(m, f);
1267 assert_not_reached("Uh, control process died at wrong time.");
1270 /* Notify clients about changed exit status */
1271 unit_add_to_dbus_queue(u);
1274 static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
1275 Mount *m = MOUNT(userdata);
1278 assert(m->timer_event_source == source);
1282 case MOUNT_MOUNTING:
1283 case MOUNT_MOUNTING_DONE:
1284 log_warning_unit(UNIT(m)->id,
1285 "%s mounting timed out. Stopping.", UNIT(m)->id);
1286 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1289 case MOUNT_REMOUNTING:
1290 log_warning_unit(UNIT(m)->id,
1291 "%s remounting timed out. Stopping.", UNIT(m)->id);
1292 m->reload_result = MOUNT_FAILURE_TIMEOUT;
1293 mount_enter_mounted(m, MOUNT_SUCCESS);
1296 case MOUNT_UNMOUNTING:
1297 log_warning_unit(UNIT(m)->id,
1298 "%s unmounting timed out. Stopping.", UNIT(m)->id);
1299 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1302 case MOUNT_MOUNTING_SIGTERM:
1303 if (m->kill_context.send_sigkill) {
1304 log_warning_unit(UNIT(m)->id,
1305 "%s mounting timed out. Killing.", UNIT(m)->id);
1306 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1308 log_warning_unit(UNIT(m)->id,
1309 "%s mounting timed out. Skipping SIGKILL. Ignoring.",
1312 if (m->from_proc_self_mountinfo)
1313 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1315 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1319 case MOUNT_REMOUNTING_SIGTERM:
1320 if (m->kill_context.send_sigkill) {
1321 log_warning_unit(UNIT(m)->id,
1322 "%s remounting timed out. Killing.", UNIT(m)->id);
1323 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1325 log_warning_unit(UNIT(m)->id,
1326 "%s remounting timed out. Skipping SIGKILL. Ignoring.",
1329 if (m->from_proc_self_mountinfo)
1330 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1332 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1336 case MOUNT_UNMOUNTING_SIGTERM:
1337 if (m->kill_context.send_sigkill) {
1338 log_warning_unit(UNIT(m)->id,
1339 "%s unmounting timed out. Killing.", UNIT(m)->id);
1340 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1342 log_warning_unit(UNIT(m)->id,
1343 "%s unmounting timed out. Skipping SIGKILL. Ignoring.",
1346 if (m->from_proc_self_mountinfo)
1347 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1349 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1353 case MOUNT_MOUNTING_SIGKILL:
1354 case MOUNT_REMOUNTING_SIGKILL:
1355 case MOUNT_UNMOUNTING_SIGKILL:
1356 log_warning_unit(UNIT(m)->id,
1357 "%s mount process still around after SIGKILL. Ignoring.",
1360 if (m->from_proc_self_mountinfo)
1361 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1363 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1367 assert_not_reached("Timeout at wrong time.");
1373 static int mount_add_one(
1377 const char *options,
1383 char *e, *w = NULL, *o = NULL, *f = NULL;
1385 bool load_extras = false;
1393 /* Ignore API mount points. They should never be referenced in
1394 * dependencies ever. */
1395 if (mount_point_is_api(where) || mount_point_ignore(where))
1398 if (streq(fstype, "autofs"))
1401 /* probably some kind of swap, ignore */
1402 if (!is_path(where))
1405 e = unit_name_from_path(where, ".mount");
1409 u = manager_get_unit(m, e);
1411 const char* const target =
1412 fstype_is_network(fstype) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET;
1416 u = unit_new(m, sizeof(Mount));
1422 r = unit_add_name(u, e);
1428 MOUNT(u)->where = strdup(where);
1429 if (!MOUNT(u)->where) {
1434 u->source_path = strdup("/proc/self/mountinfo");
1435 if (!u->source_path) {
1440 r = unit_add_dependency_by_name(u, UNIT_BEFORE, target, NULL, true);
1444 if (should_umount(MOUNT(u))) {
1445 r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
1450 unit_add_to_load_queue(u);
1455 if (!MOUNT(u)->where) {
1456 MOUNT(u)->where = strdup(where);
1457 if (!MOUNT(u)->where) {
1463 if (u->load_state == UNIT_NOT_FOUND) {
1464 u->load_state = UNIT_LOADED;
1467 /* Load in the extras later on, after we
1468 * finished initialization of the unit */
1473 if (!(w = strdup(what)) ||
1474 !(o = strdup(options)) ||
1475 !(f = strdup(fstype))) {
1480 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1482 MOUNT(u)->is_mounted = true;
1483 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1484 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1487 MOUNT(u)->from_proc_self_mountinfo = true;
1499 r = mount_add_extras(MOUNT(u));
1504 unit_add_to_dbus_queue(u);
1519 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1525 rewind(m->proc_self_mountinfo);
1528 _cleanup_free_ char *device = NULL, *path = NULL, *options = NULL, *options2 = NULL, *fstype = NULL, *d = NULL, *p = NULL, *o = NULL;
1531 k = fscanf(m->proc_self_mountinfo,
1532 "%*s " /* (1) mount id */
1533 "%*s " /* (2) parent id */
1534 "%*s " /* (3) major:minor */
1535 "%*s " /* (4) root */
1536 "%ms " /* (5) mount point */
1537 "%ms" /* (6) mount options */
1538 "%*[^-]" /* (7) optional fields */
1539 "- " /* (8) separator */
1540 "%ms " /* (9) file system type */
1541 "%ms" /* (10) mount source */
1542 "%ms" /* (11) mount options 2 */
1543 "%*[^\n]", /* some rubbish at the end */
1554 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1558 o = strjoin(options, ",", options2, NULL);
1562 d = cunescape(device);
1563 p = cunescape(path);
1567 k = mount_add_one(m, d, p, o, fstype, set_flags);
1575 static void mount_shutdown(Manager *m) {
1578 m->mount_event_source = sd_event_source_unref(m->mount_event_source);
1580 if (m->proc_self_mountinfo) {
1581 fclose(m->proc_self_mountinfo);
1582 m->proc_self_mountinfo = NULL;
1586 static int mount_enumerate(Manager *m) {
1590 if (!m->proc_self_mountinfo) {
1591 m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re");
1592 if (!m->proc_self_mountinfo)
1595 r = sd_event_add_io(m->event, fileno(m->proc_self_mountinfo), EPOLLPRI, mount_dispatch_io, m, &m->mount_event_source);
1599 /* Dispatch this before we dispatch SIGCHLD, so that
1600 * we always get the events from /proc/self/mountinfo
1601 * before the SIGCHLD of /bin/mount. */
1602 r = sd_event_source_set_priority(m->mount_event_source, -10);
1607 r = mount_load_proc_self_mountinfo(m, false);
1618 static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1619 Manager *m = userdata;
1624 assert(revents & EPOLLPRI);
1626 /* The manager calls this for every fd event happening on the
1627 * /proc/self/mountinfo file, which informs us about mounting
1630 r = mount_load_proc_self_mountinfo(m, true);
1632 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1634 /* Reset flags, just in case, for later calls */
1635 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1636 Mount *mount = MOUNT(u);
1638 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1644 manager_dispatch_load_queue(m);
1646 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1647 Mount *mount = MOUNT(u);
1649 if (!mount->is_mounted) {
1650 /* This has just been unmounted. */
1652 mount->from_proc_self_mountinfo = false;
1654 switch (mount->state) {
1657 mount_enter_dead(mount, MOUNT_SUCCESS);
1661 mount_set_state(mount, mount->state);
1666 } else if (mount->just_mounted || mount->just_changed) {
1668 /* New or changed mount entry */
1670 switch (mount->state) {
1674 mount_enter_mounted(mount, MOUNT_SUCCESS);
1677 case MOUNT_MOUNTING:
1678 mount_set_state(mount, MOUNT_MOUNTING_DONE);
1682 /* Nothing really changed, but let's
1683 * issue an notification call
1684 * nonetheless, in case somebody is
1685 * waiting for this. (e.g. file system
1686 * ro/rw remounts.) */
1687 mount_set_state(mount, mount->state);
1692 /* Reset the flags for later calls */
1693 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1699 static void mount_reset_failed(Unit *u) {
1700 Mount *m = MOUNT(u);
1704 if (m->state == MOUNT_FAILED)
1705 mount_set_state(m, MOUNT_DEAD);
1707 m->result = MOUNT_SUCCESS;
1708 m->reload_result = MOUNT_SUCCESS;
1711 static int mount_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
1712 return unit_kill_common(u, who, signo, -1, MOUNT(u)->control_pid, error);
1715 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1716 [MOUNT_DEAD] = "dead",
1717 [MOUNT_MOUNTING] = "mounting",
1718 [MOUNT_MOUNTING_DONE] = "mounting-done",
1719 [MOUNT_MOUNTED] = "mounted",
1720 [MOUNT_REMOUNTING] = "remounting",
1721 [MOUNT_UNMOUNTING] = "unmounting",
1722 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1723 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1724 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1725 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1726 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1727 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1728 [MOUNT_FAILED] = "failed"
1731 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1733 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1734 [MOUNT_EXEC_MOUNT] = "ExecMount",
1735 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1736 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1739 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1741 static const char* const mount_result_table[_MOUNT_RESULT_MAX] = {
1742 [MOUNT_SUCCESS] = "success",
1743 [MOUNT_FAILURE_RESOURCES] = "resources",
1744 [MOUNT_FAILURE_TIMEOUT] = "timeout",
1745 [MOUNT_FAILURE_EXIT_CODE] = "exit-code",
1746 [MOUNT_FAILURE_SIGNAL] = "signal",
1747 [MOUNT_FAILURE_CORE_DUMP] = "core-dump"
1750 DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult);
1752 const UnitVTable mount_vtable = {
1753 .object_size = sizeof(Mount),
1754 .exec_context_offset = offsetof(Mount, exec_context),
1755 .cgroup_context_offset = offsetof(Mount, cgroup_context),
1756 .kill_context_offset = offsetof(Mount, kill_context),
1757 .exec_runtime_offset = offsetof(Mount, exec_runtime),
1763 .private_section = "Mount",
1766 .no_instances = true,
1772 .coldplug = mount_coldplug,
1776 .start = mount_start,
1778 .reload = mount_reload,
1782 .serialize = mount_serialize,
1783 .deserialize_item = mount_deserialize_item,
1785 .active_state = mount_active_state,
1786 .sub_state_to_string = mount_sub_state_to_string,
1788 .check_gc = mount_check_gc,
1790 .sigchld_event = mount_sigchld_event,
1792 .reset_failed = mount_reset_failed,
1794 .bus_interface = "org.freedesktop.systemd1.Mount",
1795 .bus_vtable = bus_mount_vtable,
1796 .bus_changing_properties = bus_mount_changing_properties,
1797 .bus_set_property = bus_mount_set_property,
1798 .bus_commit_properties = bus_mount_commit_properties,
1800 .enumerate = mount_enumerate,
1801 .shutdown = mount_shutdown,
1803 .status_message_formats = {
1804 .starting_stopping = {
1805 [0] = "Mounting %s...",
1806 [1] = "Unmounting %s...",
1808 .finished_start_job = {
1809 [JOB_DONE] = "Mounted %s.",
1810 [JOB_FAILED] = "Failed to mount %s.",
1811 [JOB_DEPENDENCY] = "Dependency failed for %s.",
1812 [JOB_TIMEOUT] = "Timed out mounting %s.",
1814 .finished_stop_job = {
1815 [JOB_DONE] = "Unmounted %s.",
1816 [JOB_FAILED] = "Failed unmounting %s.",
1817 [JOB_TIMEOUT] = "Timed out unmounting %s.",