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) {
694 ExecParameters exec_params = {
695 .apply_permissions = true,
696 .apply_chroot = true,
697 .apply_tty_stdin = true,
704 unit_realize_cgroup(UNIT(m));
706 r = unit_setup_exec_runtime(UNIT(m));
710 r = mount_arm_timer(m);
714 exec_params.environment = UNIT(m)->manager->environment;
715 exec_params.confirm_spawn = UNIT(m)->manager->confirm_spawn;
716 exec_params.cgroup_supported = UNIT(m)->manager->cgroup_supported;
717 exec_params.cgroup_path = UNIT(m)->cgroup_path;
718 exec_params.cgroup_delegate = m->cgroup_context.delegate;
719 exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(m)->manager);
720 exec_params.unit_id = UNIT(m)->id;
730 r = unit_watch_pid(UNIT(m), pid);
732 /* FIXME: we need to do something here */
740 m->timer_event_source = sd_event_source_unref(m->timer_event_source);
745 static void mount_enter_dead(Mount *m, MountResult f) {
748 if (f != MOUNT_SUCCESS)
751 exec_runtime_destroy(m->exec_runtime);
752 m->exec_runtime = exec_runtime_unref(m->exec_runtime);
754 exec_context_destroy_runtime_directory(&m->exec_context, manager_get_runtime_prefix(UNIT(m)->manager));
756 mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD);
759 static void mount_enter_mounted(Mount *m, MountResult f) {
762 if (f != MOUNT_SUCCESS)
765 mount_set_state(m, MOUNT_MOUNTED);
768 static void mount_enter_signal(Mount *m, MountState state, MountResult f) {
773 if (f != MOUNT_SUCCESS)
776 r = unit_kill_context(
779 (state != MOUNT_MOUNTING_SIGTERM && state != MOUNT_UNMOUNTING_SIGTERM && state != MOUNT_REMOUNTING_SIGTERM) ?
780 KILL_KILL : KILL_TERMINATE,
788 r = mount_arm_timer(m);
792 mount_set_state(m, state);
793 } else if (state == MOUNT_REMOUNTING_SIGTERM)
794 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS);
795 else if (state == MOUNT_REMOUNTING_SIGKILL)
796 mount_enter_mounted(m, MOUNT_SUCCESS);
797 else if (state == MOUNT_MOUNTING_SIGTERM)
798 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_SUCCESS);
799 else if (state == MOUNT_UNMOUNTING_SIGTERM)
800 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS);
802 mount_enter_dead(m, MOUNT_SUCCESS);
807 log_warning_unit(UNIT(m)->id,
808 "%s failed to kill processes: %s", UNIT(m)->id, strerror(-r));
810 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
811 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
813 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
816 void warn_if_dir_nonempty(const char *unit, const char* where) {
820 if (dir_is_empty(where) > 0)
823 log_struct_unit(LOG_NOTICE,
825 "MESSAGE=%s: Directory %s to mount over is not empty, mounting anyway.",
828 MESSAGE_ID(SD_MESSAGE_OVERMOUNTING),
832 static int fail_if_symlink(const char *unit, const char* where) {
835 if (is_symlink(where) > 0) {
836 log_struct_unit(LOG_WARNING,
838 "MESSAGE=%s: Mount on symlink %s not allowed.",
841 MESSAGE_ID(SD_MESSAGE_OVERMOUNTING),
849 static void mount_enter_unmounting(Mount *m) {
854 m->control_command_id = MOUNT_EXEC_UNMOUNT;
855 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
857 if ((r = exec_command_set(
865 mount_unwatch_control_pid(m);
867 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
870 mount_set_state(m, MOUNT_UNMOUNTING);
875 log_warning_unit(UNIT(m)->id,
876 "%s failed to run 'umount' task: %s",
877 UNIT(m)->id, strerror(-r));
878 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
881 static void mount_enter_mounting(Mount *m) {
887 m->control_command_id = MOUNT_EXEC_MOUNT;
888 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
890 mkdir_p_label(m->where, m->directory_mode);
892 warn_if_dir_nonempty(m->meta.id, m->where);
894 /* Create the source directory for bind-mounts if needed */
895 p = get_mount_parameters_fragment(m);
896 if (p && mount_is_bind(p))
897 mkdir_p_label(p->what, m->directory_mode);
899 r = fail_if_symlink(m->meta.id, m->where);
903 if (m->from_fragment)
904 r = exec_command_set(
907 m->sloppy_options ? "-ns" : "-n",
908 m->parameters_fragment.what,
910 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
911 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
919 mount_unwatch_control_pid(m);
921 r = mount_spawn(m, m->control_command, &m->control_pid);
925 mount_set_state(m, MOUNT_MOUNTING);
930 log_warning_unit(UNIT(m)->id,
931 "%s failed to run 'mount' task: %s",
932 UNIT(m)->id, strerror(-r));
933 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
936 static void mount_enter_remounting(Mount *m) {
941 m->control_command_id = MOUNT_EXEC_REMOUNT;
942 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
944 if (m->from_fragment) {
947 if (m->parameters_fragment.options)
948 o = strappenda("remount,", m->parameters_fragment.options);
952 r = exec_command_set(
955 m->sloppy_options ? "-ns" : "-n",
956 m->parameters_fragment.what,
958 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
967 mount_unwatch_control_pid(m);
969 r = mount_spawn(m, m->control_command, &m->control_pid);
973 mount_set_state(m, MOUNT_REMOUNTING);
978 log_warning_unit(UNIT(m)->id,
979 "%s failed to run 'remount' task: %s",
980 UNIT(m)->id, strerror(-r));
981 m->reload_result = MOUNT_FAILURE_RESOURCES;
982 mount_enter_mounted(m, MOUNT_SUCCESS);
985 static int mount_start(Unit *u) {
990 /* We cannot fulfill this request right now, try again later
992 if (m->state == MOUNT_UNMOUNTING ||
993 m->state == MOUNT_UNMOUNTING_SIGTERM ||
994 m->state == MOUNT_UNMOUNTING_SIGKILL ||
995 m->state == MOUNT_MOUNTING_SIGTERM ||
996 m->state == MOUNT_MOUNTING_SIGKILL)
1000 if (m->state == MOUNT_MOUNTING)
1003 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1005 m->result = MOUNT_SUCCESS;
1006 m->reload_result = MOUNT_SUCCESS;
1008 mount_enter_mounting(m);
1012 static int mount_stop(Unit *u) {
1013 Mount *m = MOUNT(u);
1018 if (m->state == MOUNT_UNMOUNTING ||
1019 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1020 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1021 m->state == MOUNT_MOUNTING_SIGTERM ||
1022 m->state == MOUNT_MOUNTING_SIGKILL)
1025 assert(m->state == MOUNT_MOUNTING ||
1026 m->state == MOUNT_MOUNTING_DONE ||
1027 m->state == MOUNT_MOUNTED ||
1028 m->state == MOUNT_REMOUNTING ||
1029 m->state == MOUNT_REMOUNTING_SIGTERM ||
1030 m->state == MOUNT_REMOUNTING_SIGKILL);
1032 mount_enter_unmounting(m);
1036 static int mount_reload(Unit *u) {
1037 Mount *m = MOUNT(u);
1041 if (m->state == MOUNT_MOUNTING_DONE)
1044 assert(m->state == MOUNT_MOUNTED);
1046 mount_enter_remounting(m);
1050 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1051 Mount *m = MOUNT(u);
1057 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1058 unit_serialize_item(u, f, "result", mount_result_to_string(m->result));
1059 unit_serialize_item(u, f, "reload-result", mount_result_to_string(m->reload_result));
1061 if (m->control_pid > 0)
1062 unit_serialize_item_format(u, f, "control-pid", PID_FMT, m->control_pid);
1064 if (m->control_command_id >= 0)
1065 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1070 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1071 Mount *m = MOUNT(u);
1078 if (streq(key, "state")) {
1081 if ((state = mount_state_from_string(value)) < 0)
1082 log_debug_unit(u->id, "Failed to parse state value %s", value);
1084 m->deserialized_state = state;
1085 } else if (streq(key, "result")) {
1088 f = mount_result_from_string(value);
1090 log_debug_unit(UNIT(m)->id,
1091 "Failed to parse result value %s", value);
1092 else if (f != MOUNT_SUCCESS)
1095 } else if (streq(key, "reload-result")) {
1098 f = mount_result_from_string(value);
1100 log_debug_unit(UNIT(m)->id,
1101 "Failed to parse reload result value %s", value);
1102 else if (f != MOUNT_SUCCESS)
1103 m->reload_result = f;
1105 } else if (streq(key, "control-pid")) {
1108 if (parse_pid(value, &pid) < 0)
1109 log_debug_unit(UNIT(m)->id,
1110 "Failed to parse control-pid value %s", value);
1112 m->control_pid = pid;
1113 } else if (streq(key, "control-command")) {
1114 MountExecCommand id;
1116 if ((id = mount_exec_command_from_string(value)) < 0)
1117 log_debug_unit(UNIT(m)->id,
1118 "Failed to parse exec-command value %s", value);
1120 m->control_command_id = id;
1121 m->control_command = m->exec_command + id;
1124 log_debug_unit(UNIT(m)->id,
1125 "Unknown serialization key '%s'", key);
1130 _pure_ static UnitActiveState mount_active_state(Unit *u) {
1133 return state_translation_table[MOUNT(u)->state];
1136 _pure_ static const char *mount_sub_state_to_string(Unit *u) {
1139 return mount_state_to_string(MOUNT(u)->state);
1142 _pure_ static bool mount_check_gc(Unit *u) {
1143 Mount *m = MOUNT(u);
1147 return m->from_proc_self_mountinfo;
1150 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1151 Mount *m = MOUNT(u);
1157 if (pid != m->control_pid)
1162 if (is_clean_exit(code, status, NULL))
1164 else if (code == CLD_EXITED)
1165 f = MOUNT_FAILURE_EXIT_CODE;
1166 else if (code == CLD_KILLED)
1167 f = MOUNT_FAILURE_SIGNAL;
1168 else if (code == CLD_DUMPED)
1169 f = MOUNT_FAILURE_CORE_DUMP;
1171 assert_not_reached("Unknown code");
1173 if (f != MOUNT_SUCCESS)
1176 if (m->control_command) {
1177 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1179 m->control_command = NULL;
1180 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1183 log_full_unit(f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
1184 "%s mount process exited, code=%s status=%i",
1185 u->id, sigchld_code_to_string(code), status);
1187 /* Note that mount(8) returning and the kernel sending us a
1188 * mount table change event might happen out-of-order. If an
1189 * operation succeed we assume the kernel will follow soon too
1190 * and already change into the resulting state. If it fails
1191 * we check if the kernel still knows about the mount. and
1192 * change state accordingly. */
1196 case MOUNT_MOUNTING:
1197 case MOUNT_MOUNTING_DONE:
1198 case MOUNT_MOUNTING_SIGKILL:
1199 case MOUNT_MOUNTING_SIGTERM:
1201 if (f == MOUNT_SUCCESS)
1202 mount_enter_mounted(m, f);
1203 else if (m->from_proc_self_mountinfo)
1204 mount_enter_mounted(m, f);
1206 mount_enter_dead(m, f);
1209 case MOUNT_REMOUNTING:
1210 case MOUNT_REMOUNTING_SIGKILL:
1211 case MOUNT_REMOUNTING_SIGTERM:
1213 m->reload_result = f;
1214 if (m->from_proc_self_mountinfo)
1215 mount_enter_mounted(m, MOUNT_SUCCESS);
1217 mount_enter_dead(m, MOUNT_SUCCESS);
1221 case MOUNT_UNMOUNTING:
1222 case MOUNT_UNMOUNTING_SIGKILL:
1223 case MOUNT_UNMOUNTING_SIGTERM:
1225 if (f == MOUNT_SUCCESS)
1226 mount_enter_dead(m, f);
1227 else if (m->from_proc_self_mountinfo)
1228 mount_enter_mounted(m, f);
1230 mount_enter_dead(m, f);
1234 assert_not_reached("Uh, control process died at wrong time.");
1237 /* Notify clients about changed exit status */
1238 unit_add_to_dbus_queue(u);
1241 static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
1242 Mount *m = MOUNT(userdata);
1245 assert(m->timer_event_source == source);
1249 case MOUNT_MOUNTING:
1250 case MOUNT_MOUNTING_DONE:
1251 log_warning_unit(UNIT(m)->id,
1252 "%s mounting timed out. Stopping.", UNIT(m)->id);
1253 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1256 case MOUNT_REMOUNTING:
1257 log_warning_unit(UNIT(m)->id,
1258 "%s remounting timed out. Stopping.", UNIT(m)->id);
1259 m->reload_result = MOUNT_FAILURE_TIMEOUT;
1260 mount_enter_mounted(m, MOUNT_SUCCESS);
1263 case MOUNT_UNMOUNTING:
1264 log_warning_unit(UNIT(m)->id,
1265 "%s unmounting timed out. Stopping.", UNIT(m)->id);
1266 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1269 case MOUNT_MOUNTING_SIGTERM:
1270 if (m->kill_context.send_sigkill) {
1271 log_warning_unit(UNIT(m)->id,
1272 "%s mounting timed out. Killing.", UNIT(m)->id);
1273 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1275 log_warning_unit(UNIT(m)->id,
1276 "%s mounting timed out. Skipping SIGKILL. Ignoring.",
1279 if (m->from_proc_self_mountinfo)
1280 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1282 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1286 case MOUNT_REMOUNTING_SIGTERM:
1287 if (m->kill_context.send_sigkill) {
1288 log_warning_unit(UNIT(m)->id,
1289 "%s remounting timed out. Killing.", UNIT(m)->id);
1290 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1292 log_warning_unit(UNIT(m)->id,
1293 "%s remounting timed out. Skipping SIGKILL. Ignoring.",
1296 if (m->from_proc_self_mountinfo)
1297 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1299 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1303 case MOUNT_UNMOUNTING_SIGTERM:
1304 if (m->kill_context.send_sigkill) {
1305 log_warning_unit(UNIT(m)->id,
1306 "%s unmounting timed out. Killing.", UNIT(m)->id);
1307 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1309 log_warning_unit(UNIT(m)->id,
1310 "%s unmounting timed out. Skipping SIGKILL. Ignoring.",
1313 if (m->from_proc_self_mountinfo)
1314 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1316 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1320 case MOUNT_MOUNTING_SIGKILL:
1321 case MOUNT_REMOUNTING_SIGKILL:
1322 case MOUNT_UNMOUNTING_SIGKILL:
1323 log_warning_unit(UNIT(m)->id,
1324 "%s mount process still around after SIGKILL. Ignoring.",
1327 if (m->from_proc_self_mountinfo)
1328 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1330 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1334 assert_not_reached("Timeout at wrong time.");
1340 static int mount_add_one(
1344 const char *options,
1348 _cleanup_free_ char *e = NULL, *w = NULL, *o = NULL, *f = NULL;
1349 bool load_extras = false;
1351 bool delete, changed = false;
1361 /* Ignore API mount points. They should never be referenced in
1362 * dependencies ever. */
1363 if (mount_point_is_api(where) || mount_point_ignore(where))
1366 if (streq(fstype, "autofs"))
1369 /* probably some kind of swap, ignore */
1370 if (!is_path(where))
1373 e = unit_name_from_path(where, ".mount");
1377 u = manager_get_unit(m, e);
1381 u = unit_new(m, sizeof(Mount));
1385 r = unit_add_name(u, e);
1389 MOUNT(u)->where = strdup(where);
1390 if (!MOUNT(u)->where) {
1395 u->source_path = strdup("/proc/self/mountinfo");
1396 if (!u->source_path) {
1402 if (m->running_as == SYSTEMD_SYSTEM) {
1405 target = fstype_is_network(fstype) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET;
1407 r = unit_add_dependency_by_name(u, UNIT_BEFORE, target, NULL, true);
1411 if (should_umount(MOUNT(u))) {
1412 r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
1418 unit_add_to_load_queue(u);
1423 if (!MOUNT(u)->where) {
1424 MOUNT(u)->where = strdup(where);
1425 if (!MOUNT(u)->where) {
1431 if (u->load_state == UNIT_NOT_FOUND) {
1432 u->load_state = UNIT_LOADED;
1435 /* Load in the extras later on, after we
1436 * finished initialization of the unit */
1443 o = strdup(options);
1445 if (!w || !o || !f) {
1450 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1452 changed = changed ||
1453 !streq_ptr(p->options, options) ||
1454 !streq_ptr(p->what, what) ||
1455 !streq_ptr(p->fstype, fstype);
1458 MOUNT(u)->is_mounted = true;
1459 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1460 MOUNT(u)->just_changed = changed;
1463 MOUNT(u)->from_proc_self_mountinfo = true;
1478 r = mount_add_extras(MOUNT(u));
1484 unit_add_to_dbus_queue(u);
1495 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1501 rewind(m->proc_self_mountinfo);
1504 _cleanup_free_ char *device = NULL, *path = NULL, *options = NULL, *options2 = NULL, *fstype = NULL, *d = NULL, *p = NULL, *o = NULL;
1507 k = fscanf(m->proc_self_mountinfo,
1508 "%*s " /* (1) mount id */
1509 "%*s " /* (2) parent id */
1510 "%*s " /* (3) major:minor */
1511 "%*s " /* (4) root */
1512 "%ms " /* (5) mount point */
1513 "%ms" /* (6) mount options */
1514 "%*[^-]" /* (7) optional fields */
1515 "- " /* (8) separator */
1516 "%ms " /* (9) file system type */
1517 "%ms" /* (10) mount source */
1518 "%ms" /* (11) mount options 2 */
1519 "%*[^\n]", /* some rubbish at the end */
1530 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1534 o = strjoin(options, ",", options2, NULL);
1538 d = cunescape(device);
1539 p = cunescape(path);
1543 k = mount_add_one(m, d, p, o, fstype, set_flags);
1551 static void mount_shutdown(Manager *m) {
1554 m->mount_event_source = sd_event_source_unref(m->mount_event_source);
1556 if (m->proc_self_mountinfo) {
1557 fclose(m->proc_self_mountinfo);
1558 m->proc_self_mountinfo = NULL;
1562 static int mount_get_timeout(Unit *u, uint64_t *timeout) {
1563 Mount *m = MOUNT(u);
1566 if (!m->timer_event_source)
1569 r = sd_event_source_get_time(m->timer_event_source, timeout);
1576 static int mount_enumerate(Manager *m) {
1580 if (!m->proc_self_mountinfo) {
1581 m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re");
1582 if (!m->proc_self_mountinfo)
1585 r = sd_event_add_io(m->event, &m->mount_event_source, fileno(m->proc_self_mountinfo), EPOLLPRI, mount_dispatch_io, m);
1589 /* Dispatch this before we dispatch SIGCHLD, so that
1590 * we always get the events from /proc/self/mountinfo
1591 * before the SIGCHLD of /bin/mount. */
1592 r = sd_event_source_set_priority(m->mount_event_source, -10);
1597 r = mount_load_proc_self_mountinfo(m, false);
1608 static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1609 Manager *m = userdata;
1614 assert(revents & EPOLLPRI);
1616 /* The manager calls this for every fd event happening on the
1617 * /proc/self/mountinfo file, which informs us about mounting
1620 r = mount_load_proc_self_mountinfo(m, true);
1622 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1624 /* Reset flags, just in case, for later calls */
1625 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1626 Mount *mount = MOUNT(u);
1628 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1634 manager_dispatch_load_queue(m);
1636 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1637 Mount *mount = MOUNT(u);
1639 if (!mount->is_mounted) {
1641 mount->from_proc_self_mountinfo = false;
1643 switch (mount->state) {
1646 /* This has just been unmounted by
1647 * somebody else, follow the state
1649 mount_enter_dead(mount, MOUNT_SUCCESS);
1656 } else if (mount->just_mounted || mount->just_changed) {
1658 /* New or changed mount entry */
1660 switch (mount->state) {
1664 /* This has just been mounted by
1665 * somebody else, follow the state
1667 mount_enter_mounted(mount, MOUNT_SUCCESS);
1670 case MOUNT_MOUNTING:
1671 mount_set_state(mount, MOUNT_MOUNTING_DONE);
1675 /* Nothing really changed, but let's
1676 * issue an notification call
1677 * nonetheless, in case somebody is
1678 * waiting for this. (e.g. file system
1679 * ro/rw remounts.) */
1680 mount_set_state(mount, mount->state);
1685 /* Reset the flags for later calls */
1686 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1692 static void mount_reset_failed(Unit *u) {
1693 Mount *m = MOUNT(u);
1697 if (m->state == MOUNT_FAILED)
1698 mount_set_state(m, MOUNT_DEAD);
1700 m->result = MOUNT_SUCCESS;
1701 m->reload_result = MOUNT_SUCCESS;
1704 static int mount_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
1705 return unit_kill_common(u, who, signo, -1, MOUNT(u)->control_pid, error);
1708 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1709 [MOUNT_DEAD] = "dead",
1710 [MOUNT_MOUNTING] = "mounting",
1711 [MOUNT_MOUNTING_DONE] = "mounting-done",
1712 [MOUNT_MOUNTED] = "mounted",
1713 [MOUNT_REMOUNTING] = "remounting",
1714 [MOUNT_UNMOUNTING] = "unmounting",
1715 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1716 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1717 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1718 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1719 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1720 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1721 [MOUNT_FAILED] = "failed"
1724 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1726 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1727 [MOUNT_EXEC_MOUNT] = "ExecMount",
1728 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1729 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1732 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1734 static const char* const mount_result_table[_MOUNT_RESULT_MAX] = {
1735 [MOUNT_SUCCESS] = "success",
1736 [MOUNT_FAILURE_RESOURCES] = "resources",
1737 [MOUNT_FAILURE_TIMEOUT] = "timeout",
1738 [MOUNT_FAILURE_EXIT_CODE] = "exit-code",
1739 [MOUNT_FAILURE_SIGNAL] = "signal",
1740 [MOUNT_FAILURE_CORE_DUMP] = "core-dump"
1743 DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult);
1745 const UnitVTable mount_vtable = {
1746 .object_size = sizeof(Mount),
1747 .exec_context_offset = offsetof(Mount, exec_context),
1748 .cgroup_context_offset = offsetof(Mount, cgroup_context),
1749 .kill_context_offset = offsetof(Mount, kill_context),
1750 .exec_runtime_offset = offsetof(Mount, exec_runtime),
1756 .private_section = "Mount",
1759 .no_instances = true,
1765 .coldplug = mount_coldplug,
1769 .start = mount_start,
1771 .reload = mount_reload,
1775 .serialize = mount_serialize,
1776 .deserialize_item = mount_deserialize_item,
1778 .active_state = mount_active_state,
1779 .sub_state_to_string = mount_sub_state_to_string,
1781 .check_gc = mount_check_gc,
1783 .sigchld_event = mount_sigchld_event,
1785 .reset_failed = mount_reset_failed,
1787 .bus_interface = "org.freedesktop.systemd1.Mount",
1788 .bus_vtable = bus_mount_vtable,
1789 .bus_set_property = bus_mount_set_property,
1790 .bus_commit_properties = bus_mount_commit_properties,
1792 .get_timeout = mount_get_timeout,
1794 .can_transient = true,
1796 .enumerate = mount_enumerate,
1797 .shutdown = mount_shutdown,
1799 .status_message_formats = {
1800 .starting_stopping = {
1801 [0] = "Mounting %s...",
1802 [1] = "Unmounting %s...",
1804 .finished_start_job = {
1805 [JOB_DONE] = "Mounted %s.",
1806 [JOB_FAILED] = "Failed to mount %s.",
1807 [JOB_DEPENDENCY] = "Dependency failed for %s.",
1808 [JOB_TIMEOUT] = "Timed out mounting %s.",
1810 .finished_stop_job = {
1811 [JOB_DONE] = "Unmounted %s.",
1812 [JOB_FAILED] = "Failed unmounting %s.",
1813 [JOB_TIMEOUT] = "Timed out unmounting %s.",