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) {
822 r = dir_is_empty(where);
826 log_struct_unit(LOG_NOTICE,
828 "MESSAGE=%s: Directory %s to mount over is not empty, mounting anyway.",
831 MESSAGE_ID(SD_MESSAGE_OVERMOUNTING),
834 log_warning_unit(unit,
835 "MESSAGE=Failed to check directory %s: %s",
836 where, strerror(-r));
839 static int fail_if_symlink(const char *unit, const char* where) {
842 if (is_symlink(where) > 0) {
843 log_struct_unit(LOG_WARNING,
845 "MESSAGE=%s: Mount on symlink %s not allowed.",
848 MESSAGE_ID(SD_MESSAGE_OVERMOUNTING),
856 static void mount_enter_unmounting(Mount *m) {
861 m->control_command_id = MOUNT_EXEC_UNMOUNT;
862 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
864 if ((r = exec_command_set(
872 mount_unwatch_control_pid(m);
874 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
877 mount_set_state(m, MOUNT_UNMOUNTING);
882 log_warning_unit(UNIT(m)->id,
883 "%s failed to run 'umount' task: %s",
884 UNIT(m)->id, strerror(-r));
885 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
888 static void mount_enter_mounting(Mount *m) {
894 m->control_command_id = MOUNT_EXEC_MOUNT;
895 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
897 mkdir_p_label(m->where, m->directory_mode);
899 warn_if_dir_nonempty(m->meta.id, m->where);
901 /* Create the source directory for bind-mounts if needed */
902 p = get_mount_parameters_fragment(m);
903 if (p && mount_is_bind(p))
904 mkdir_p_label(p->what, m->directory_mode);
906 r = fail_if_symlink(m->meta.id, m->where);
910 if (m->from_fragment)
911 r = exec_command_set(
914 m->sloppy_options ? "-ns" : "-n",
915 m->parameters_fragment.what,
917 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
918 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
926 mount_unwatch_control_pid(m);
928 r = mount_spawn(m, m->control_command, &m->control_pid);
932 mount_set_state(m, MOUNT_MOUNTING);
937 log_warning_unit(UNIT(m)->id,
938 "%s failed to run 'mount' task: %s",
939 UNIT(m)->id, strerror(-r));
940 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
943 static void mount_enter_remounting(Mount *m) {
948 m->control_command_id = MOUNT_EXEC_REMOUNT;
949 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
951 if (m->from_fragment) {
954 if (m->parameters_fragment.options)
955 o = strappenda("remount,", m->parameters_fragment.options);
959 r = exec_command_set(
962 m->sloppy_options ? "-ns" : "-n",
963 m->parameters_fragment.what,
965 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
974 mount_unwatch_control_pid(m);
976 r = mount_spawn(m, m->control_command, &m->control_pid);
980 mount_set_state(m, MOUNT_REMOUNTING);
985 log_warning_unit(UNIT(m)->id,
986 "%s failed to run 'remount' task: %s",
987 UNIT(m)->id, strerror(-r));
988 m->reload_result = MOUNT_FAILURE_RESOURCES;
989 mount_enter_mounted(m, MOUNT_SUCCESS);
992 static int mount_start(Unit *u) {
997 /* We cannot fulfill this request right now, try again later
999 if (m->state == MOUNT_UNMOUNTING ||
1000 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1001 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1002 m->state == MOUNT_MOUNTING_SIGTERM ||
1003 m->state == MOUNT_MOUNTING_SIGKILL)
1006 /* Already on it! */
1007 if (m->state == MOUNT_MOUNTING)
1010 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1012 m->result = MOUNT_SUCCESS;
1013 m->reload_result = MOUNT_SUCCESS;
1015 mount_enter_mounting(m);
1019 static int mount_stop(Unit *u) {
1020 Mount *m = MOUNT(u);
1025 if (m->state == MOUNT_UNMOUNTING ||
1026 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1027 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1028 m->state == MOUNT_MOUNTING_SIGTERM ||
1029 m->state == MOUNT_MOUNTING_SIGKILL)
1032 assert(m->state == MOUNT_MOUNTING ||
1033 m->state == MOUNT_MOUNTING_DONE ||
1034 m->state == MOUNT_MOUNTED ||
1035 m->state == MOUNT_REMOUNTING ||
1036 m->state == MOUNT_REMOUNTING_SIGTERM ||
1037 m->state == MOUNT_REMOUNTING_SIGKILL);
1039 mount_enter_unmounting(m);
1043 static int mount_reload(Unit *u) {
1044 Mount *m = MOUNT(u);
1048 if (m->state == MOUNT_MOUNTING_DONE)
1051 assert(m->state == MOUNT_MOUNTED);
1053 mount_enter_remounting(m);
1057 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1058 Mount *m = MOUNT(u);
1064 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1065 unit_serialize_item(u, f, "result", mount_result_to_string(m->result));
1066 unit_serialize_item(u, f, "reload-result", mount_result_to_string(m->reload_result));
1068 if (m->control_pid > 0)
1069 unit_serialize_item_format(u, f, "control-pid", PID_FMT, m->control_pid);
1071 if (m->control_command_id >= 0)
1072 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1077 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1078 Mount *m = MOUNT(u);
1085 if (streq(key, "state")) {
1088 if ((state = mount_state_from_string(value)) < 0)
1089 log_debug_unit(u->id, "Failed to parse state value %s", value);
1091 m->deserialized_state = state;
1092 } else if (streq(key, "result")) {
1095 f = mount_result_from_string(value);
1097 log_debug_unit(UNIT(m)->id,
1098 "Failed to parse result value %s", value);
1099 else if (f != MOUNT_SUCCESS)
1102 } else if (streq(key, "reload-result")) {
1105 f = mount_result_from_string(value);
1107 log_debug_unit(UNIT(m)->id,
1108 "Failed to parse reload result value %s", value);
1109 else if (f != MOUNT_SUCCESS)
1110 m->reload_result = f;
1112 } else if (streq(key, "control-pid")) {
1115 if (parse_pid(value, &pid) < 0)
1116 log_debug_unit(UNIT(m)->id,
1117 "Failed to parse control-pid value %s", value);
1119 m->control_pid = pid;
1120 } else if (streq(key, "control-command")) {
1121 MountExecCommand id;
1123 if ((id = mount_exec_command_from_string(value)) < 0)
1124 log_debug_unit(UNIT(m)->id,
1125 "Failed to parse exec-command value %s", value);
1127 m->control_command_id = id;
1128 m->control_command = m->exec_command + id;
1131 log_debug_unit(UNIT(m)->id,
1132 "Unknown serialization key '%s'", key);
1137 _pure_ static UnitActiveState mount_active_state(Unit *u) {
1140 return state_translation_table[MOUNT(u)->state];
1143 _pure_ static const char *mount_sub_state_to_string(Unit *u) {
1146 return mount_state_to_string(MOUNT(u)->state);
1149 _pure_ static bool mount_check_gc(Unit *u) {
1150 Mount *m = MOUNT(u);
1154 return m->from_proc_self_mountinfo;
1157 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1158 Mount *m = MOUNT(u);
1164 if (pid != m->control_pid)
1169 if (is_clean_exit(code, status, NULL))
1171 else if (code == CLD_EXITED)
1172 f = MOUNT_FAILURE_EXIT_CODE;
1173 else if (code == CLD_KILLED)
1174 f = MOUNT_FAILURE_SIGNAL;
1175 else if (code == CLD_DUMPED)
1176 f = MOUNT_FAILURE_CORE_DUMP;
1178 assert_not_reached("Unknown code");
1180 if (f != MOUNT_SUCCESS)
1183 if (m->control_command) {
1184 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1186 m->control_command = NULL;
1187 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1190 log_full_unit(f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
1191 "%s mount process exited, code=%s status=%i",
1192 u->id, sigchld_code_to_string(code), status);
1194 /* Note that mount(8) returning and the kernel sending us a
1195 * mount table change event might happen out-of-order. If an
1196 * operation succeed we assume the kernel will follow soon too
1197 * and already change into the resulting state. If it fails
1198 * we check if the kernel still knows about the mount. and
1199 * change state accordingly. */
1203 case MOUNT_MOUNTING:
1204 case MOUNT_MOUNTING_DONE:
1205 case MOUNT_MOUNTING_SIGKILL:
1206 case MOUNT_MOUNTING_SIGTERM:
1208 if (f == MOUNT_SUCCESS)
1209 mount_enter_mounted(m, f);
1210 else if (m->from_proc_self_mountinfo)
1211 mount_enter_mounted(m, f);
1213 mount_enter_dead(m, f);
1216 case MOUNT_REMOUNTING:
1217 case MOUNT_REMOUNTING_SIGKILL:
1218 case MOUNT_REMOUNTING_SIGTERM:
1220 m->reload_result = f;
1221 if (m->from_proc_self_mountinfo)
1222 mount_enter_mounted(m, MOUNT_SUCCESS);
1224 mount_enter_dead(m, MOUNT_SUCCESS);
1228 case MOUNT_UNMOUNTING:
1229 case MOUNT_UNMOUNTING_SIGKILL:
1230 case MOUNT_UNMOUNTING_SIGTERM:
1232 if (f == MOUNT_SUCCESS)
1233 mount_enter_dead(m, f);
1234 else if (m->from_proc_self_mountinfo)
1235 mount_enter_mounted(m, f);
1237 mount_enter_dead(m, f);
1241 assert_not_reached("Uh, control process died at wrong time.");
1244 /* Notify clients about changed exit status */
1245 unit_add_to_dbus_queue(u);
1248 static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
1249 Mount *m = MOUNT(userdata);
1252 assert(m->timer_event_source == source);
1256 case MOUNT_MOUNTING:
1257 case MOUNT_MOUNTING_DONE:
1258 log_warning_unit(UNIT(m)->id,
1259 "%s mounting timed out. Stopping.", UNIT(m)->id);
1260 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1263 case MOUNT_REMOUNTING:
1264 log_warning_unit(UNIT(m)->id,
1265 "%s remounting timed out. Stopping.", UNIT(m)->id);
1266 m->reload_result = MOUNT_FAILURE_TIMEOUT;
1267 mount_enter_mounted(m, MOUNT_SUCCESS);
1270 case MOUNT_UNMOUNTING:
1271 log_warning_unit(UNIT(m)->id,
1272 "%s unmounting timed out. Stopping.", UNIT(m)->id);
1273 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1276 case MOUNT_MOUNTING_SIGTERM:
1277 if (m->kill_context.send_sigkill) {
1278 log_warning_unit(UNIT(m)->id,
1279 "%s mounting timed out. Killing.", UNIT(m)->id);
1280 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1282 log_warning_unit(UNIT(m)->id,
1283 "%s mounting timed out. Skipping SIGKILL. Ignoring.",
1286 if (m->from_proc_self_mountinfo)
1287 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1289 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1293 case MOUNT_REMOUNTING_SIGTERM:
1294 if (m->kill_context.send_sigkill) {
1295 log_warning_unit(UNIT(m)->id,
1296 "%s remounting timed out. Killing.", UNIT(m)->id);
1297 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1299 log_warning_unit(UNIT(m)->id,
1300 "%s remounting timed out. Skipping SIGKILL. Ignoring.",
1303 if (m->from_proc_self_mountinfo)
1304 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1306 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1310 case MOUNT_UNMOUNTING_SIGTERM:
1311 if (m->kill_context.send_sigkill) {
1312 log_warning_unit(UNIT(m)->id,
1313 "%s unmounting timed out. Killing.", UNIT(m)->id);
1314 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1316 log_warning_unit(UNIT(m)->id,
1317 "%s unmounting timed out. Skipping SIGKILL. Ignoring.",
1320 if (m->from_proc_self_mountinfo)
1321 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1323 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1327 case MOUNT_MOUNTING_SIGKILL:
1328 case MOUNT_REMOUNTING_SIGKILL:
1329 case MOUNT_UNMOUNTING_SIGKILL:
1330 log_warning_unit(UNIT(m)->id,
1331 "%s mount process still around after SIGKILL. Ignoring.",
1334 if (m->from_proc_self_mountinfo)
1335 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1337 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1341 assert_not_reached("Timeout at wrong time.");
1347 static int mount_add_one(
1351 const char *options,
1355 _cleanup_free_ char *e = NULL, *w = NULL, *o = NULL, *f = NULL;
1356 bool load_extras = false;
1358 bool delete, changed = false;
1368 /* Ignore API mount points. They should never be referenced in
1369 * dependencies ever. */
1370 if (mount_point_is_api(where) || mount_point_ignore(where))
1373 if (streq(fstype, "autofs"))
1376 /* probably some kind of swap, ignore */
1377 if (!is_path(where))
1380 e = unit_name_from_path(where, ".mount");
1384 u = manager_get_unit(m, e);
1388 u = unit_new(m, sizeof(Mount));
1392 r = unit_add_name(u, e);
1396 MOUNT(u)->where = strdup(where);
1397 if (!MOUNT(u)->where) {
1402 u->source_path = strdup("/proc/self/mountinfo");
1403 if (!u->source_path) {
1409 if (m->running_as == SYSTEMD_SYSTEM) {
1412 target = fstype_is_network(fstype) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET;
1414 r = unit_add_dependency_by_name(u, UNIT_BEFORE, target, NULL, true);
1418 if (should_umount(MOUNT(u))) {
1419 r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
1425 unit_add_to_load_queue(u);
1430 if (!MOUNT(u)->where) {
1431 MOUNT(u)->where = strdup(where);
1432 if (!MOUNT(u)->where) {
1438 if (u->load_state == UNIT_NOT_FOUND) {
1439 u->load_state = UNIT_LOADED;
1442 /* Load in the extras later on, after we
1443 * finished initialization of the unit */
1450 o = strdup(options);
1452 if (!w || !o || !f) {
1457 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1459 changed = changed ||
1460 !streq_ptr(p->options, options) ||
1461 !streq_ptr(p->what, what) ||
1462 !streq_ptr(p->fstype, fstype);
1465 MOUNT(u)->is_mounted = true;
1466 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1467 MOUNT(u)->just_changed = changed;
1470 MOUNT(u)->from_proc_self_mountinfo = true;
1485 r = mount_add_extras(MOUNT(u));
1491 unit_add_to_dbus_queue(u);
1502 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1508 rewind(m->proc_self_mountinfo);
1511 _cleanup_free_ char *device = NULL, *path = NULL, *options = NULL, *options2 = NULL, *fstype = NULL, *d = NULL, *p = NULL, *o = NULL;
1514 k = fscanf(m->proc_self_mountinfo,
1515 "%*s " /* (1) mount id */
1516 "%*s " /* (2) parent id */
1517 "%*s " /* (3) major:minor */
1518 "%*s " /* (4) root */
1519 "%ms " /* (5) mount point */
1520 "%ms" /* (6) mount options */
1521 "%*[^-]" /* (7) optional fields */
1522 "- " /* (8) separator */
1523 "%ms " /* (9) file system type */
1524 "%ms" /* (10) mount source */
1525 "%ms" /* (11) mount options 2 */
1526 "%*[^\n]", /* some rubbish at the end */
1537 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1541 o = strjoin(options, ",", options2, NULL);
1545 d = cunescape(device);
1546 p = cunescape(path);
1550 k = mount_add_one(m, d, p, o, fstype, set_flags);
1558 static void mount_shutdown(Manager *m) {
1561 m->mount_event_source = sd_event_source_unref(m->mount_event_source);
1563 if (m->proc_self_mountinfo) {
1564 fclose(m->proc_self_mountinfo);
1565 m->proc_self_mountinfo = NULL;
1569 static int mount_get_timeout(Unit *u, uint64_t *timeout) {
1570 Mount *m = MOUNT(u);
1573 if (!m->timer_event_source)
1576 r = sd_event_source_get_time(m->timer_event_source, timeout);
1583 static int mount_enumerate(Manager *m) {
1587 if (!m->proc_self_mountinfo) {
1588 m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re");
1589 if (!m->proc_self_mountinfo)
1592 r = sd_event_add_io(m->event, &m->mount_event_source, fileno(m->proc_self_mountinfo), EPOLLPRI, mount_dispatch_io, m);
1596 /* Dispatch this before we dispatch SIGCHLD, so that
1597 * we always get the events from /proc/self/mountinfo
1598 * before the SIGCHLD of /bin/mount. */
1599 r = sd_event_source_set_priority(m->mount_event_source, -10);
1604 r = mount_load_proc_self_mountinfo(m, false);
1615 static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1616 Manager *m = userdata;
1621 assert(revents & EPOLLPRI);
1623 /* The manager calls this for every fd event happening on the
1624 * /proc/self/mountinfo file, which informs us about mounting
1627 r = mount_load_proc_self_mountinfo(m, true);
1629 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1631 /* Reset flags, just in case, for later calls */
1632 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1633 Mount *mount = MOUNT(u);
1635 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1641 manager_dispatch_load_queue(m);
1643 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1644 Mount *mount = MOUNT(u);
1646 if (!mount->is_mounted) {
1648 mount->from_proc_self_mountinfo = false;
1650 switch (mount->state) {
1653 /* This has just been unmounted by
1654 * somebody else, follow the state
1656 mount_enter_dead(mount, MOUNT_SUCCESS);
1663 } else if (mount->just_mounted || mount->just_changed) {
1665 /* New or changed mount entry */
1667 switch (mount->state) {
1671 /* This has just been mounted by
1672 * somebody else, follow the 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_set_property = bus_mount_set_property,
1797 .bus_commit_properties = bus_mount_commit_properties,
1799 .get_timeout = mount_get_timeout,
1801 .can_transient = true,
1803 .enumerate = mount_enumerate,
1804 .shutdown = mount_shutdown,
1806 .status_message_formats = {
1807 .starting_stopping = {
1808 [0] = "Mounting %s...",
1809 [1] = "Unmounting %s...",
1811 .finished_start_job = {
1812 [JOB_DONE] = "Mounted %s.",
1813 [JOB_FAILED] = "Failed to mount %s.",
1814 [JOB_DEPENDENCY] = "Dependency failed for %s.",
1815 [JOB_TIMEOUT] = "Timed out mounting %s.",
1817 .finished_stop_job = {
1818 [JOB_DONE] = "Unmounted %s.",
1819 [JOB_FAILED] = "Failed unmounting %s.",
1820 [JOB_TIMEOUT] = "Timed out unmounting %s.",