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 bool mount_is_network(MountParameters *p) {
68 if (mount_test_option(p->options, "_netdev"))
71 if (p->fstype && fstype_is_network(p->fstype))
77 static bool mount_is_bind(MountParameters *p) {
80 if (mount_test_option(p->options, "bind"))
83 if (p->fstype && streq(p->fstype, "bind"))
86 if (mount_test_option(p->options, "rbind"))
89 if (p->fstype && streq(p->fstype, "rbind"))
95 static bool mount_is_auto(MountParameters *p) {
98 return !mount_test_option(p->options, "noauto");
101 static bool needs_quota(MountParameters *p) {
104 if (mount_is_network(p))
107 if (mount_is_bind(p))
110 return mount_test_option(p->options, "usrquota") ||
111 mount_test_option(p->options, "grpquota") ||
112 mount_test_option(p->options, "quota") ||
113 mount_test_option(p->options, "usrjquota") ||
114 mount_test_option(p->options, "grpjquota");
117 static void mount_init(Unit *u) {
121 assert(u->load_state == UNIT_STUB);
123 m->timeout_usec = u->manager->default_timeout_start_usec;
124 m->directory_mode = 0755;
126 if (unit_has_name(u, "-.mount")) {
127 /* Don't allow start/stop for root directory */
128 u->refuse_manual_start = true;
129 u->refuse_manual_stop = true;
131 /* The stdio/kmsg bridge socket is on /, in order to avoid a
132 * dep loop, don't use kmsg logging for -.mount */
133 m->exec_context.std_output = u->manager->default_std_output;
134 m->exec_context.std_error = u->manager->default_std_error;
137 /* We need to make sure that /bin/mount is always called in
138 * the same process group as us, so that the autofs kernel
139 * side doesn't send us another mount request while we are
140 * already trying to comply its last one. */
141 m->exec_context.same_pgrp = true;
143 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
145 u->ignore_on_isolate = true;
148 static int mount_arm_timer(Mount *m) {
153 if (m->timeout_usec <= 0) {
154 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
158 if (m->timer_event_source) {
159 r = sd_event_source_set_time(m->timer_event_source, now(CLOCK_MONOTONIC) + m->timeout_usec);
163 return sd_event_source_set_enabled(m->timer_event_source, SD_EVENT_ONESHOT);
166 return sd_event_add_time(
167 UNIT(m)->manager->event,
168 &m->timer_event_source,
170 now(CLOCK_MONOTONIC) + m->timeout_usec, 0,
171 mount_dispatch_timer, m);
174 static void mount_unwatch_control_pid(Mount *m) {
177 if (m->control_pid <= 0)
180 unit_unwatch_pid(UNIT(m), m->control_pid);
184 static void mount_parameters_done(MountParameters *p) {
191 p->what = p->options = p->fstype = NULL;
194 static void mount_done(Unit *u) {
202 mount_parameters_done(&m->parameters_proc_self_mountinfo);
203 mount_parameters_done(&m->parameters_fragment);
205 m->exec_runtime = exec_runtime_unref(m->exec_runtime);
206 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
207 m->control_command = NULL;
209 mount_unwatch_control_pid(m);
211 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
214 _pure_ static MountParameters* get_mount_parameters_fragment(Mount *m) {
217 if (m->from_fragment)
218 return &m->parameters_fragment;
223 _pure_ static MountParameters* get_mount_parameters(Mount *m) {
226 if (m->from_proc_self_mountinfo)
227 return &m->parameters_proc_self_mountinfo;
229 return get_mount_parameters_fragment(m);
232 static int mount_add_mount_links(Mount *m) {
233 _cleanup_free_ char *parent = NULL;
242 if (!path_equal(m->where, "/")) {
243 /* Adds in links to other mount points that might lie further
244 * up in the hierarchy */
245 r = path_get_parent(m->where, &parent);
249 r = unit_require_mounts_for(UNIT(m), parent);
254 /* Adds in links to other mount points that might be needed
255 * for the source path (if this is a bind mount) to be
257 pm = get_mount_parameters_fragment(m);
258 if (pm && pm->what &&
259 path_is_absolute(pm->what) &&
260 !mount_is_network(pm)) {
262 r = unit_require_mounts_for(UNIT(m), pm->what);
267 /* Adds in links to other units that use this path or paths
268 * further down in the hierarchy */
269 s = manager_get_units_requiring_mounts_for(UNIT(m)->manager, m->where);
270 SET_FOREACH(other, s, i) {
272 if (other->load_state != UNIT_LOADED)
275 if (other == UNIT(m))
278 r = unit_add_dependency(other, UNIT_AFTER, UNIT(m), true);
282 if (UNIT(m)->fragment_path) {
283 /* If we have fragment configuration, then make this dependency required */
284 r = unit_add_dependency(other, UNIT_REQUIRES, UNIT(m), true);
293 static int mount_add_device_links(Mount *m) {
295 bool device_wants_mount = false;
300 p = get_mount_parameters_fragment(m);
307 if (mount_is_bind(p))
310 if (!is_device_path(p->what))
313 if (path_equal(m->where, "/"))
316 if (mount_is_auto(p) && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM)
317 device_wants_mount = true;
319 r = unit_add_node_link(UNIT(m), p->what, device_wants_mount);
326 static int mount_add_quota_links(Mount *m) {
332 if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM)
335 p = get_mount_parameters_fragment(m);
342 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true);
346 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true);
353 static bool should_umount(Mount *m) {
356 if (path_equal(m->where, "/") ||
357 path_equal(m->where, "/usr"))
360 p = get_mount_parameters(m);
361 if (p && mount_test_option(p->options, "x-initrd.mount") &&
368 static int mount_add_default_dependencies(Mount *m) {
369 const char *after, *after2, *online;
375 if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM)
378 p = get_mount_parameters(m);
383 if (path_equal(m->where, "/") ||
384 path_equal(m->where, "/usr"))
387 if (mount_is_network(p)) {
388 after = SPECIAL_REMOTE_FS_PRE_TARGET;
389 after2 = SPECIAL_NETWORK_TARGET;
390 online = SPECIAL_NETWORK_ONLINE_TARGET;
392 after = SPECIAL_LOCAL_FS_PRE_TARGET;
397 r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true);
402 r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true);
408 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, online, NULL, true);
413 if (should_umount(m)) {
414 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
422 static int mount_verify(Mount *m) {
423 _cleanup_free_ char *e = NULL;
428 if (UNIT(m)->load_state != UNIT_LOADED)
431 if (!m->from_fragment && !m->from_proc_self_mountinfo)
434 e = unit_name_from_path(m->where, ".mount");
438 b = unit_has_name(UNIT(m), e);
440 log_error_unit(UNIT(m)->id, "%s's Where= setting doesn't match unit name. Refusing.", UNIT(m)->id);
444 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
445 log_error_unit(UNIT(m)->id, "Cannot create mount unit for API file system %s. Refusing.", m->where);
449 if (UNIT(m)->fragment_path && !m->parameters_fragment.what) {
450 log_error_unit(UNIT(m)->id, "%s's What setting is missing. Refusing.", UNIT(m)->id);
454 if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) {
455 log_error_unit(UNIT(m)->id, "%s has PAM enabled. Kill mode must be set to control-group'. Refusing.",UNIT(m)->id);
462 static int mount_add_extras(Mount *m) {
468 if (u->fragment_path)
469 m->from_fragment = true;
472 m->where = unit_name_to_path(u->id);
477 path_kill_slashes(m->where);
479 if (!u->description) {
480 r = unit_set_description(u, m->where);
485 r = mount_add_device_links(m);
489 r = mount_add_mount_links(m);
493 r = mount_add_quota_links(m);
497 r = unit_patch_contexts(u);
501 r = unit_add_exec_dependencies(u, &m->exec_context);
505 r = unit_add_default_slice(u, &m->cgroup_context);
509 if (u->default_dependencies) {
510 r = mount_add_default_dependencies(m);
518 static int mount_load(Unit *u) {
523 assert(u->load_state == UNIT_STUB);
525 if (m->from_proc_self_mountinfo)
526 r = unit_load_fragment_and_dropin_optional(u);
528 r = unit_load_fragment_and_dropin(u);
533 /* This is a new unit? Then let's add in some extras */
534 if (u->load_state == UNIT_LOADED) {
535 r = mount_add_extras(m);
540 return mount_verify(m);
543 static int mount_notify_automount(Mount *m, int status) {
550 SET_FOREACH(p, UNIT(m)->dependencies[UNIT_TRIGGERED_BY], i)
551 if (p->type == UNIT_AUTOMOUNT) {
552 r = automount_send_ready(AUTOMOUNT(p), status);
560 static void mount_set_state(Mount *m, MountState state) {
561 MountState old_state;
564 old_state = m->state;
567 if (state != MOUNT_MOUNTING &&
568 state != MOUNT_MOUNTING_DONE &&
569 state != MOUNT_REMOUNTING &&
570 state != MOUNT_UNMOUNTING &&
571 state != MOUNT_MOUNTING_SIGTERM &&
572 state != MOUNT_MOUNTING_SIGKILL &&
573 state != MOUNT_UNMOUNTING_SIGTERM &&
574 state != MOUNT_UNMOUNTING_SIGKILL &&
575 state != MOUNT_REMOUNTING_SIGTERM &&
576 state != MOUNT_REMOUNTING_SIGKILL) {
577 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
578 mount_unwatch_control_pid(m);
579 m->control_command = NULL;
580 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
583 if (state == MOUNT_MOUNTED ||
584 state == MOUNT_REMOUNTING)
585 mount_notify_automount(m, 0);
586 else if (state == MOUNT_DEAD ||
587 state == MOUNT_UNMOUNTING ||
588 state == MOUNT_MOUNTING_SIGTERM ||
589 state == MOUNT_MOUNTING_SIGKILL ||
590 state == MOUNT_REMOUNTING_SIGTERM ||
591 state == MOUNT_REMOUNTING_SIGKILL ||
592 state == MOUNT_UNMOUNTING_SIGTERM ||
593 state == MOUNT_UNMOUNTING_SIGKILL ||
594 state == MOUNT_FAILED) {
595 if (state != old_state)
596 mount_notify_automount(m, -ENODEV);
599 if (state != old_state)
600 log_debug_unit(UNIT(m)->id,
601 "%s changed %s -> %s",
603 mount_state_to_string(old_state),
604 mount_state_to_string(state));
606 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], m->reload_result == MOUNT_SUCCESS);
607 m->reload_result = MOUNT_SUCCESS;
610 static int mount_coldplug(Unit *u) {
612 MountState new_state = MOUNT_DEAD;
616 assert(m->state == MOUNT_DEAD);
618 if (m->deserialized_state != m->state)
619 new_state = m->deserialized_state;
620 else if (m->from_proc_self_mountinfo)
621 new_state = MOUNT_MOUNTED;
623 if (new_state == m->state)
626 if (new_state == MOUNT_MOUNTING ||
627 new_state == MOUNT_MOUNTING_DONE ||
628 new_state == MOUNT_REMOUNTING ||
629 new_state == MOUNT_UNMOUNTING ||
630 new_state == MOUNT_MOUNTING_SIGTERM ||
631 new_state == MOUNT_MOUNTING_SIGKILL ||
632 new_state == MOUNT_UNMOUNTING_SIGTERM ||
633 new_state == MOUNT_UNMOUNTING_SIGKILL ||
634 new_state == MOUNT_REMOUNTING_SIGTERM ||
635 new_state == MOUNT_REMOUNTING_SIGKILL) {
637 if (m->control_pid <= 0)
640 r = unit_watch_pid(UNIT(m), m->control_pid);
644 r = mount_arm_timer(m);
649 mount_set_state(m, new_state);
653 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
660 p = get_mount_parameters(m);
663 "%sMount State: %s\n"
667 "%sFile System Type: %s\n"
669 "%sFrom /proc/self/mountinfo: %s\n"
670 "%sFrom fragment: %s\n"
671 "%sDirectoryMode: %04o\n",
672 prefix, mount_state_to_string(m->state),
673 prefix, mount_result_to_string(m->result),
675 prefix, p ? strna(p->what) : "n/a",
676 prefix, p ? strna(p->fstype) : "n/a",
677 prefix, p ? strna(p->options) : "n/a",
678 prefix, yes_no(m->from_proc_self_mountinfo),
679 prefix, yes_no(m->from_fragment),
680 prefix, m->directory_mode);
682 if (m->control_pid > 0)
684 "%sControl PID: "PID_FMT"\n",
685 prefix, m->control_pid);
687 exec_context_dump(&m->exec_context, f, prefix);
688 kill_context_dump(&m->kill_context, f, prefix);
691 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
699 unit_realize_cgroup(UNIT(m));
701 r = unit_setup_exec_runtime(UNIT(m));
705 r = mount_arm_timer(m);
713 UNIT(m)->manager->environment,
717 UNIT(m)->manager->confirm_spawn,
718 UNIT(m)->manager->cgroup_supported,
719 UNIT(m)->cgroup_path,
720 manager_get_runtime_prefix(UNIT(m)->manager),
729 r = unit_watch_pid(UNIT(m), pid);
731 /* FIXME: we need to do something here */
739 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
744 static void mount_enter_dead(Mount *m, MountResult f) {
747 if (f != MOUNT_SUCCESS)
750 exec_runtime_destroy(m->exec_runtime);
751 m->exec_runtime = exec_runtime_unref(m->exec_runtime);
753 exec_context_destroy_runtime_directory(&m->exec_context, manager_get_runtime_prefix(UNIT(m)->manager));
755 mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD);
758 static void mount_enter_mounted(Mount *m, MountResult f) {
761 if (f != MOUNT_SUCCESS)
764 mount_set_state(m, MOUNT_MOUNTED);
767 static void mount_enter_signal(Mount *m, MountState state, MountResult f) {
772 if (f != MOUNT_SUCCESS)
775 r = unit_kill_context(
778 state != MOUNT_MOUNTING_SIGTERM && state != MOUNT_UNMOUNTING_SIGTERM && state != MOUNT_REMOUNTING_SIGTERM,
786 r = mount_arm_timer(m);
790 mount_set_state(m, state);
791 } else if (state == MOUNT_REMOUNTING_SIGTERM)
792 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS);
793 else if (state == MOUNT_REMOUNTING_SIGKILL)
794 mount_enter_mounted(m, MOUNT_SUCCESS);
795 else if (state == MOUNT_MOUNTING_SIGTERM)
796 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_SUCCESS);
797 else if (state == MOUNT_UNMOUNTING_SIGTERM)
798 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS);
800 mount_enter_dead(m, MOUNT_SUCCESS);
805 log_warning_unit(UNIT(m)->id,
806 "%s failed to kill processes: %s", UNIT(m)->id, strerror(-r));
808 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
809 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
811 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
814 void warn_if_dir_nonempty(const char *unit, const char* where) {
818 if (dir_is_empty(where) > 0)
821 log_struct_unit(LOG_NOTICE,
823 "MESSAGE=%s: Directory %s to mount over is not empty, mounting anyway.",
826 MESSAGE_ID(SD_MESSAGE_OVERMOUNTING),
830 static void mount_enter_unmounting(Mount *m) {
835 m->control_command_id = MOUNT_EXEC_UNMOUNT;
836 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
838 if ((r = exec_command_set(
846 mount_unwatch_control_pid(m);
848 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
851 mount_set_state(m, MOUNT_UNMOUNTING);
856 log_warning_unit(UNIT(m)->id,
857 "%s failed to run 'umount' task: %s",
858 UNIT(m)->id, strerror(-r));
859 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
862 static void mount_enter_mounting(Mount *m) {
868 m->control_command_id = MOUNT_EXEC_MOUNT;
869 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
871 mkdir_p_label(m->where, m->directory_mode);
873 warn_if_dir_nonempty(m->meta.id, m->where);
875 /* Create the source directory for bind-mounts if needed */
876 p = get_mount_parameters_fragment(m);
877 if (p && mount_is_bind(p))
878 mkdir_p_label(p->what, m->directory_mode);
880 if (m->from_fragment)
881 r = exec_command_set(
884 m->sloppy_options ? "-ns" : "-n",
885 m->parameters_fragment.what,
887 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
888 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
896 mount_unwatch_control_pid(m);
898 r = mount_spawn(m, m->control_command, &m->control_pid);
902 mount_set_state(m, MOUNT_MOUNTING);
907 log_warning_unit(UNIT(m)->id,
908 "%s failed to run 'mount' task: %s",
909 UNIT(m)->id, strerror(-r));
910 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
913 static void mount_enter_remounting(Mount *m) {
918 m->control_command_id = MOUNT_EXEC_REMOUNT;
919 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
921 if (m->from_fragment) {
924 if (m->parameters_fragment.options)
925 o = strappenda("remount,", m->parameters_fragment.options);
929 r = exec_command_set(
932 m->sloppy_options ? "-ns" : "-n",
933 m->parameters_fragment.what,
935 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
944 mount_unwatch_control_pid(m);
946 r = mount_spawn(m, m->control_command, &m->control_pid);
950 mount_set_state(m, MOUNT_REMOUNTING);
955 log_warning_unit(UNIT(m)->id,
956 "%s failed to run 'remount' task: %s",
957 UNIT(m)->id, strerror(-r));
958 m->reload_result = MOUNT_FAILURE_RESOURCES;
959 mount_enter_mounted(m, MOUNT_SUCCESS);
962 static int mount_start(Unit *u) {
967 /* We cannot fulfill this request right now, try again later
969 if (m->state == MOUNT_UNMOUNTING ||
970 m->state == MOUNT_UNMOUNTING_SIGTERM ||
971 m->state == MOUNT_UNMOUNTING_SIGKILL ||
972 m->state == MOUNT_MOUNTING_SIGTERM ||
973 m->state == MOUNT_MOUNTING_SIGKILL)
977 if (m->state == MOUNT_MOUNTING)
980 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
982 m->result = MOUNT_SUCCESS;
983 m->reload_result = MOUNT_SUCCESS;
985 mount_enter_mounting(m);
989 static int mount_stop(Unit *u) {
995 if (m->state == MOUNT_UNMOUNTING ||
996 m->state == MOUNT_UNMOUNTING_SIGKILL ||
997 m->state == MOUNT_UNMOUNTING_SIGTERM ||
998 m->state == MOUNT_MOUNTING_SIGTERM ||
999 m->state == MOUNT_MOUNTING_SIGKILL)
1002 assert(m->state == MOUNT_MOUNTING ||
1003 m->state == MOUNT_MOUNTING_DONE ||
1004 m->state == MOUNT_MOUNTED ||
1005 m->state == MOUNT_REMOUNTING ||
1006 m->state == MOUNT_REMOUNTING_SIGTERM ||
1007 m->state == MOUNT_REMOUNTING_SIGKILL);
1009 mount_enter_unmounting(m);
1013 static int mount_reload(Unit *u) {
1014 Mount *m = MOUNT(u);
1018 if (m->state == MOUNT_MOUNTING_DONE)
1021 assert(m->state == MOUNT_MOUNTED);
1023 mount_enter_remounting(m);
1027 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1028 Mount *m = MOUNT(u);
1034 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1035 unit_serialize_item(u, f, "result", mount_result_to_string(m->result));
1036 unit_serialize_item(u, f, "reload-result", mount_result_to_string(m->reload_result));
1038 if (m->control_pid > 0)
1039 unit_serialize_item_format(u, f, "control-pid", PID_FMT, m->control_pid);
1041 if (m->control_command_id >= 0)
1042 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1047 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1048 Mount *m = MOUNT(u);
1055 if (streq(key, "state")) {
1058 if ((state = mount_state_from_string(value)) < 0)
1059 log_debug_unit(u->id, "Failed to parse state value %s", value);
1061 m->deserialized_state = state;
1062 } else if (streq(key, "result")) {
1065 f = mount_result_from_string(value);
1067 log_debug_unit(UNIT(m)->id,
1068 "Failed to parse result value %s", value);
1069 else if (f != MOUNT_SUCCESS)
1072 } else if (streq(key, "reload-result")) {
1075 f = mount_result_from_string(value);
1077 log_debug_unit(UNIT(m)->id,
1078 "Failed to parse reload result value %s", value);
1079 else if (f != MOUNT_SUCCESS)
1080 m->reload_result = f;
1082 } else if (streq(key, "control-pid")) {
1085 if (parse_pid(value, &pid) < 0)
1086 log_debug_unit(UNIT(m)->id,
1087 "Failed to parse control-pid value %s", value);
1089 m->control_pid = pid;
1090 } else if (streq(key, "control-command")) {
1091 MountExecCommand id;
1093 if ((id = mount_exec_command_from_string(value)) < 0)
1094 log_debug_unit(UNIT(m)->id,
1095 "Failed to parse exec-command value %s", value);
1097 m->control_command_id = id;
1098 m->control_command = m->exec_command + id;
1101 log_debug_unit(UNIT(m)->id,
1102 "Unknown serialization key '%s'", key);
1107 _pure_ static UnitActiveState mount_active_state(Unit *u) {
1110 return state_translation_table[MOUNT(u)->state];
1113 _pure_ static const char *mount_sub_state_to_string(Unit *u) {
1116 return mount_state_to_string(MOUNT(u)->state);
1119 _pure_ static bool mount_check_gc(Unit *u) {
1120 Mount *m = MOUNT(u);
1124 return m->from_proc_self_mountinfo;
1127 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1128 Mount *m = MOUNT(u);
1134 if (pid != m->control_pid)
1139 if (is_clean_exit(code, status, NULL))
1141 else if (code == CLD_EXITED)
1142 f = MOUNT_FAILURE_EXIT_CODE;
1143 else if (code == CLD_KILLED)
1144 f = MOUNT_FAILURE_SIGNAL;
1145 else if (code == CLD_DUMPED)
1146 f = MOUNT_FAILURE_CORE_DUMP;
1148 assert_not_reached("Unknown code");
1150 if (f != MOUNT_SUCCESS)
1153 if (m->control_command) {
1154 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1156 m->control_command = NULL;
1157 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1160 log_full_unit(f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
1161 "%s mount process exited, code=%s status=%i",
1162 u->id, sigchld_code_to_string(code), status);
1164 /* Note that mount(8) returning and the kernel sending us a
1165 * mount table change event might happen out-of-order. If an
1166 * operation succeed we assume the kernel will follow soon too
1167 * and already change into the resulting state. If it fails
1168 * we check if the kernel still knows about the mount. and
1169 * change state accordingly. */
1173 case MOUNT_MOUNTING:
1174 case MOUNT_MOUNTING_DONE:
1175 case MOUNT_MOUNTING_SIGKILL:
1176 case MOUNT_MOUNTING_SIGTERM:
1178 if (f == MOUNT_SUCCESS)
1179 mount_enter_mounted(m, f);
1180 else if (m->from_proc_self_mountinfo)
1181 mount_enter_mounted(m, f);
1183 mount_enter_dead(m, f);
1186 case MOUNT_REMOUNTING:
1187 case MOUNT_REMOUNTING_SIGKILL:
1188 case MOUNT_REMOUNTING_SIGTERM:
1190 m->reload_result = f;
1191 if (m->from_proc_self_mountinfo)
1192 mount_enter_mounted(m, MOUNT_SUCCESS);
1194 mount_enter_dead(m, MOUNT_SUCCESS);
1198 case MOUNT_UNMOUNTING:
1199 case MOUNT_UNMOUNTING_SIGKILL:
1200 case MOUNT_UNMOUNTING_SIGTERM:
1202 if (f == MOUNT_SUCCESS)
1203 mount_enter_dead(m, f);
1204 else if (m->from_proc_self_mountinfo)
1205 mount_enter_mounted(m, f);
1207 mount_enter_dead(m, f);
1211 assert_not_reached("Uh, control process died at wrong time.");
1214 /* Notify clients about changed exit status */
1215 unit_add_to_dbus_queue(u);
1218 static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
1219 Mount *m = MOUNT(userdata);
1222 assert(m->timer_event_source == source);
1226 case MOUNT_MOUNTING:
1227 case MOUNT_MOUNTING_DONE:
1228 log_warning_unit(UNIT(m)->id,
1229 "%s mounting timed out. Stopping.", UNIT(m)->id);
1230 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1233 case MOUNT_REMOUNTING:
1234 log_warning_unit(UNIT(m)->id,
1235 "%s remounting timed out. Stopping.", UNIT(m)->id);
1236 m->reload_result = MOUNT_FAILURE_TIMEOUT;
1237 mount_enter_mounted(m, MOUNT_SUCCESS);
1240 case MOUNT_UNMOUNTING:
1241 log_warning_unit(UNIT(m)->id,
1242 "%s unmounting timed out. Stopping.", UNIT(m)->id);
1243 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1246 case MOUNT_MOUNTING_SIGTERM:
1247 if (m->kill_context.send_sigkill) {
1248 log_warning_unit(UNIT(m)->id,
1249 "%s mounting timed out. Killing.", UNIT(m)->id);
1250 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1252 log_warning_unit(UNIT(m)->id,
1253 "%s mounting timed out. Skipping SIGKILL. Ignoring.",
1256 if (m->from_proc_self_mountinfo)
1257 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1259 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1263 case MOUNT_REMOUNTING_SIGTERM:
1264 if (m->kill_context.send_sigkill) {
1265 log_warning_unit(UNIT(m)->id,
1266 "%s remounting timed out. Killing.", UNIT(m)->id);
1267 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1269 log_warning_unit(UNIT(m)->id,
1270 "%s remounting timed out. Skipping SIGKILL. Ignoring.",
1273 if (m->from_proc_self_mountinfo)
1274 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1276 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1280 case MOUNT_UNMOUNTING_SIGTERM:
1281 if (m->kill_context.send_sigkill) {
1282 log_warning_unit(UNIT(m)->id,
1283 "%s unmounting timed out. Killing.", UNIT(m)->id);
1284 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1286 log_warning_unit(UNIT(m)->id,
1287 "%s unmounting timed out. Skipping SIGKILL. Ignoring.",
1290 if (m->from_proc_self_mountinfo)
1291 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1293 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1297 case MOUNT_MOUNTING_SIGKILL:
1298 case MOUNT_REMOUNTING_SIGKILL:
1299 case MOUNT_UNMOUNTING_SIGKILL:
1300 log_warning_unit(UNIT(m)->id,
1301 "%s mount process still around after SIGKILL. Ignoring.",
1304 if (m->from_proc_self_mountinfo)
1305 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1307 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1311 assert_not_reached("Timeout at wrong time.");
1317 static int mount_add_one(
1321 const char *options,
1325 _cleanup_free_ char *e = NULL, *w = NULL, *o = NULL, *f = NULL;
1326 bool load_extras = false;
1328 bool delete, changed = false;
1338 /* Ignore API mount points. They should never be referenced in
1339 * dependencies ever. */
1340 if (mount_point_is_api(where) || mount_point_ignore(where))
1343 if (streq(fstype, "autofs"))
1346 /* probably some kind of swap, ignore */
1347 if (!is_path(where))
1350 e = unit_name_from_path(where, ".mount");
1354 u = manager_get_unit(m, e);
1358 u = unit_new(m, sizeof(Mount));
1362 r = unit_add_name(u, e);
1366 MOUNT(u)->where = strdup(where);
1367 if (!MOUNT(u)->where) {
1372 u->source_path = strdup("/proc/self/mountinfo");
1373 if (!u->source_path) {
1379 if (m->running_as == SYSTEMD_SYSTEM) {
1382 target = fstype_is_network(fstype) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET;
1384 r = unit_add_dependency_by_name(u, UNIT_BEFORE, target, NULL, true);
1388 if (should_umount(MOUNT(u))) {
1389 r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
1395 unit_add_to_load_queue(u);
1400 if (!MOUNT(u)->where) {
1401 MOUNT(u)->where = strdup(where);
1402 if (!MOUNT(u)->where) {
1408 if (u->load_state == UNIT_NOT_FOUND) {
1409 u->load_state = UNIT_LOADED;
1412 /* Load in the extras later on, after we
1413 * finished initialization of the unit */
1420 o = strdup(options);
1422 if (!w || !o || !f) {
1427 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1429 changed = changed ||
1430 !streq_ptr(p->options, options) ||
1431 !streq_ptr(p->what, what) ||
1432 !streq_ptr(p->fstype, fstype);
1435 MOUNT(u)->is_mounted = true;
1436 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1437 MOUNT(u)->just_changed = changed;
1440 MOUNT(u)->from_proc_self_mountinfo = true;
1455 r = mount_add_extras(MOUNT(u));
1461 unit_add_to_dbus_queue(u);
1472 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1478 rewind(m->proc_self_mountinfo);
1481 _cleanup_free_ char *device = NULL, *path = NULL, *options = NULL, *options2 = NULL, *fstype = NULL, *d = NULL, *p = NULL, *o = NULL;
1484 k = fscanf(m->proc_self_mountinfo,
1485 "%*s " /* (1) mount id */
1486 "%*s " /* (2) parent id */
1487 "%*s " /* (3) major:minor */
1488 "%*s " /* (4) root */
1489 "%ms " /* (5) mount point */
1490 "%ms" /* (6) mount options */
1491 "%*[^-]" /* (7) optional fields */
1492 "- " /* (8) separator */
1493 "%ms " /* (9) file system type */
1494 "%ms" /* (10) mount source */
1495 "%ms" /* (11) mount options 2 */
1496 "%*[^\n]", /* some rubbish at the end */
1507 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1511 o = strjoin(options, ",", options2, NULL);
1515 d = cunescape(device);
1516 p = cunescape(path);
1520 k = mount_add_one(m, d, p, o, fstype, set_flags);
1528 static void mount_shutdown(Manager *m) {
1531 m->mount_event_source = sd_event_source_unref(m->mount_event_source);
1533 if (m->proc_self_mountinfo) {
1534 fclose(m->proc_self_mountinfo);
1535 m->proc_self_mountinfo = NULL;
1539 static int mount_get_timeout(Unit *u, uint64_t *timeout) {
1540 Mount *m = MOUNT(u);
1543 if (!m->timer_event_source)
1546 r = sd_event_source_get_time(m->timer_event_source, timeout);
1553 static int mount_enumerate(Manager *m) {
1557 if (!m->proc_self_mountinfo) {
1558 m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re");
1559 if (!m->proc_self_mountinfo)
1562 r = sd_event_add_io(m->event, &m->mount_event_source, fileno(m->proc_self_mountinfo), EPOLLPRI, mount_dispatch_io, m);
1566 /* Dispatch this before we dispatch SIGCHLD, so that
1567 * we always get the events from /proc/self/mountinfo
1568 * before the SIGCHLD of /bin/mount. */
1569 r = sd_event_source_set_priority(m->mount_event_source, -10);
1574 r = mount_load_proc_self_mountinfo(m, false);
1585 static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1586 Manager *m = userdata;
1591 assert(revents & EPOLLPRI);
1593 /* The manager calls this for every fd event happening on the
1594 * /proc/self/mountinfo file, which informs us about mounting
1597 r = mount_load_proc_self_mountinfo(m, true);
1599 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1601 /* Reset flags, just in case, for later calls */
1602 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1603 Mount *mount = MOUNT(u);
1605 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1611 manager_dispatch_load_queue(m);
1613 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1614 Mount *mount = MOUNT(u);
1616 if (!mount->is_mounted) {
1618 mount->from_proc_self_mountinfo = false;
1620 switch (mount->state) {
1623 /* This has just been unmounted by
1624 * somebody else, follow the state
1626 mount_enter_dead(mount, MOUNT_SUCCESS);
1633 } else if (mount->just_mounted || mount->just_changed) {
1635 /* New or changed mount entry */
1637 switch (mount->state) {
1641 /* This has just been mounted by
1642 * somebody else, follow the state
1644 mount_enter_mounted(mount, MOUNT_SUCCESS);
1647 case MOUNT_MOUNTING:
1648 mount_set_state(mount, MOUNT_MOUNTING_DONE);
1652 /* Nothing really changed, but let's
1653 * issue an notification call
1654 * nonetheless, in case somebody is
1655 * waiting for this. (e.g. file system
1656 * ro/rw remounts.) */
1657 mount_set_state(mount, mount->state);
1662 /* Reset the flags for later calls */
1663 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1669 static void mount_reset_failed(Unit *u) {
1670 Mount *m = MOUNT(u);
1674 if (m->state == MOUNT_FAILED)
1675 mount_set_state(m, MOUNT_DEAD);
1677 m->result = MOUNT_SUCCESS;
1678 m->reload_result = MOUNT_SUCCESS;
1681 static int mount_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
1682 return unit_kill_common(u, who, signo, -1, MOUNT(u)->control_pid, error);
1685 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1686 [MOUNT_DEAD] = "dead",
1687 [MOUNT_MOUNTING] = "mounting",
1688 [MOUNT_MOUNTING_DONE] = "mounting-done",
1689 [MOUNT_MOUNTED] = "mounted",
1690 [MOUNT_REMOUNTING] = "remounting",
1691 [MOUNT_UNMOUNTING] = "unmounting",
1692 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1693 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1694 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1695 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1696 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1697 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1698 [MOUNT_FAILED] = "failed"
1701 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1703 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1704 [MOUNT_EXEC_MOUNT] = "ExecMount",
1705 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1706 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1709 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1711 static const char* const mount_result_table[_MOUNT_RESULT_MAX] = {
1712 [MOUNT_SUCCESS] = "success",
1713 [MOUNT_FAILURE_RESOURCES] = "resources",
1714 [MOUNT_FAILURE_TIMEOUT] = "timeout",
1715 [MOUNT_FAILURE_EXIT_CODE] = "exit-code",
1716 [MOUNT_FAILURE_SIGNAL] = "signal",
1717 [MOUNT_FAILURE_CORE_DUMP] = "core-dump"
1720 DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult);
1722 const UnitVTable mount_vtable = {
1723 .object_size = sizeof(Mount),
1724 .exec_context_offset = offsetof(Mount, exec_context),
1725 .cgroup_context_offset = offsetof(Mount, cgroup_context),
1726 .kill_context_offset = offsetof(Mount, kill_context),
1727 .exec_runtime_offset = offsetof(Mount, exec_runtime),
1733 .private_section = "Mount",
1736 .no_instances = true,
1742 .coldplug = mount_coldplug,
1746 .start = mount_start,
1748 .reload = mount_reload,
1752 .serialize = mount_serialize,
1753 .deserialize_item = mount_deserialize_item,
1755 .active_state = mount_active_state,
1756 .sub_state_to_string = mount_sub_state_to_string,
1758 .check_gc = mount_check_gc,
1760 .sigchld_event = mount_sigchld_event,
1762 .reset_failed = mount_reset_failed,
1764 .bus_interface = "org.freedesktop.systemd1.Mount",
1765 .bus_vtable = bus_mount_vtable,
1766 .bus_set_property = bus_mount_set_property,
1767 .bus_commit_properties = bus_mount_commit_properties,
1769 .get_timeout = mount_get_timeout,
1771 .can_transient = true,
1773 .enumerate = mount_enumerate,
1774 .shutdown = mount_shutdown,
1776 .status_message_formats = {
1777 .starting_stopping = {
1778 [0] = "Mounting %s...",
1779 [1] = "Unmounting %s...",
1781 .finished_start_job = {
1782 [JOB_DONE] = "Mounted %s.",
1783 [JOB_FAILED] = "Failed to mount %s.",
1784 [JOB_DEPENDENCY] = "Dependency failed for %s.",
1785 [JOB_TIMEOUT] = "Timed out mounting %s.",
1787 .finished_stop_job = {
1788 [JOB_DONE] = "Unmounted %s.",
1789 [JOB_FAILED] = "Failed unmounting %s.",
1790 [JOB_TIMEOUT] = "Timed out unmounting %s.",