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>
30 #include "load-fragment.h"
31 #include "load-dropin.h"
33 #include "sd-messages.h"
36 #include "path-util.h"
37 #include "mount-setup.h"
38 #include "unit-name.h"
39 #include "dbus-mount.h"
41 #include "bus-errors.h"
42 #include "exit-status.h"
45 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
46 [MOUNT_DEAD] = UNIT_INACTIVE,
47 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
48 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
49 [MOUNT_MOUNTED] = UNIT_ACTIVE,
50 [MOUNT_REMOUNTING] = UNIT_RELOADING,
51 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
52 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
53 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
54 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
55 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
56 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
57 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
58 [MOUNT_FAILED] = UNIT_FAILED
61 static void mount_init(Unit *u) {
65 assert(u->load_state == UNIT_STUB);
67 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
68 m->directory_mode = 0755;
70 exec_context_init(&m->exec_context);
72 if (unit_has_name(u, "-.mount")) {
73 /* Don't allow start/stop for root directory */
74 UNIT(m)->refuse_manual_start = true;
75 UNIT(m)->refuse_manual_stop = true;
77 /* The stdio/kmsg bridge socket is on /, in order to avoid a
78 * dep loop, don't use kmsg logging for -.mount */
79 m->exec_context.std_output = u->manager->default_std_output;
80 m->exec_context.std_error = u->manager->default_std_error;
83 kill_context_init(&m->kill_context);
85 /* We need to make sure that /bin/mount is always called in
86 * the same process group as us, so that the autofs kernel
87 * side doesn't send us another mount request while we are
88 * already trying to comply its last one. */
89 m->exec_context.same_pgrp = true;
91 m->timer_watch.type = WATCH_INVALID;
93 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
95 UNIT(m)->ignore_on_isolate = true;
98 static void mount_unwatch_control_pid(Mount *m) {
101 if (m->control_pid <= 0)
104 unit_unwatch_pid(UNIT(m), m->control_pid);
108 static void mount_parameters_done(MountParameters *p) {
115 p->what = p->options = p->fstype = NULL;
118 static void mount_done(Unit *u) {
126 mount_parameters_done(&m->parameters_proc_self_mountinfo);
127 mount_parameters_done(&m->parameters_fragment);
129 exec_context_done(&m->exec_context);
130 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
131 m->control_command = NULL;
133 mount_unwatch_control_pid(m);
135 unit_unwatch_timer(u, &m->timer_watch);
138 static MountParameters* get_mount_parameters_fragment(Mount *m) {
141 if (m->from_fragment)
142 return &m->parameters_fragment;
147 static MountParameters* get_mount_parameters(Mount *m) {
150 if (m->from_proc_self_mountinfo)
151 return &m->parameters_proc_self_mountinfo;
153 return get_mount_parameters_fragment(m);
156 static int mount_add_mount_links(Mount *m) {
163 pm = get_mount_parameters_fragment(m);
165 /* Adds in links to other mount points that might lie below or
166 * above us in the hierarchy */
168 LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_MOUNT]) {
169 Mount *n = MOUNT(other);
175 if (UNIT(n)->load_state != UNIT_LOADED)
178 pn = get_mount_parameters_fragment(n);
180 if (path_startswith(m->where, n->where)) {
182 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
186 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
189 } else if (path_startswith(n->where, m->where)) {
191 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
195 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
198 } else if (pm && pm->what && path_startswith(pm->what, n->where)) {
200 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
203 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
206 } else if (pn && pn->what && path_startswith(pn->what, m->where)) {
208 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
211 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
219 static int mount_add_swap_links(Mount *m) {
225 LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_SWAP]) {
226 r = swap_add_one_mount_link(SWAP(other), m);
234 static int mount_add_path_links(Mount *m) {
240 LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_PATH]) {
241 r = path_add_one_mount_link(PATH(other), m);
249 static int mount_add_automount_links(Mount *m) {
255 LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_AUTOMOUNT]) {
256 r = automount_add_one_mount_link(AUTOMOUNT(other), m);
264 static int mount_add_socket_links(Mount *m) {
270 LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_SOCKET]) {
271 r = socket_add_one_mount_link(SOCKET(other), m);
279 static int mount_add_requires_mounts_links(Mount *m) {
285 LIST_FOREACH(has_requires_mounts_for, other, UNIT(m)->manager->has_requires_mounts_for) {
286 r = unit_add_one_mount_link(other, m);
294 static char* mount_test_option(const char *haystack, const char *needle) {
299 /* Like glibc's hasmntopt(), but works on a string, not a
306 me.mnt_opts = (char*) haystack;
308 return hasmntopt(&me, needle);
311 static bool mount_is_network(MountParameters *p) {
314 if (mount_test_option(p->options, "_netdev"))
317 if (p->fstype && fstype_is_network(p->fstype))
323 static bool mount_is_bind(MountParameters *p) {
326 if (mount_test_option(p->options, "bind"))
329 if (p->fstype && streq(p->fstype, "bind"))
335 static bool needs_quota(MountParameters *p) {
338 if (mount_is_network(p))
341 if (mount_is_bind(p))
344 return mount_test_option(p->options, "usrquota") ||
345 mount_test_option(p->options, "grpquota") ||
346 mount_test_option(p->options, "quota") ||
347 mount_test_option(p->options, "usrjquota") ||
348 mount_test_option(p->options, "grpjquota");
351 static int mount_add_device_links(Mount *m) {
357 p = get_mount_parameters_fragment(m);
364 if (mount_is_bind(p))
367 if (!is_device_path(p->what))
370 if (path_equal(m->where, "/"))
373 r = unit_add_node_link(UNIT(m), p->what, false);
378 UNIT(m)->manager->running_as == SYSTEMD_SYSTEM) {
381 /* Let's add in the fsck service */
383 /* aka SPECIAL_FSCK_SERVICE */
384 name = unit_name_from_path_instance("systemd-fsck", p->what, ".service");
388 r = manager_load_unit_prepare(UNIT(m)->manager, name, NULL, NULL, &fsck);
390 log_warning_unit(name,
391 "Failed to prepare unit %s: %s", name, strerror(-r));
397 SERVICE(fsck)->fsck_passno = p->passno;
399 r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true);
407 static int mount_add_quota_links(Mount *m) {
413 if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM)
416 p = get_mount_parameters_fragment(m);
423 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true);
427 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true);
434 static int mount_add_default_dependencies(Mount *m) {
441 if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM)
444 p = get_mount_parameters_fragment(m);
448 if (path_equal(m->where, "/"))
451 if (mount_is_network(p))
452 after = SPECIAL_REMOTE_FS_PRE_TARGET;
454 after = SPECIAL_LOCAL_FS_PRE_TARGET;
456 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, after, NULL, true);
460 r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
467 static int mount_fix_timeouts(Mount *m) {
469 const char *timeout = NULL;
478 p = get_mount_parameters_fragment(m);
482 /* Allow configuration how long we wait for a device that
483 * backs a mount point to show up. This is useful to support
484 * endless device timeouts for devices that show up only after
485 * user input, like crypto devices. */
487 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
489 else if ((timeout = mount_test_option(p->options, "x-systemd.device-timeout")))
494 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
498 r = parse_usec(t, &u);
502 log_warning_unit(UNIT(m)->id,
503 "Failed to parse timeout for %s, ignoring: %s",
508 SET_FOREACH(other, UNIT(m)->dependencies[UNIT_AFTER], i) {
509 if (other->type != UNIT_DEVICE)
512 other->job_timeout = u;
518 static int mount_verify(Mount *m) {
523 if (UNIT(m)->load_state != UNIT_LOADED)
526 if (!m->from_fragment && !m->from_proc_self_mountinfo)
529 if (!(e = unit_name_from_path(m->where, ".mount")))
532 b = unit_has_name(UNIT(m), e);
536 log_error_unit(UNIT(m)->id,
537 "%s's Where setting doesn't match unit name. Refusing.",
542 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
543 log_error_unit(UNIT(m)->id,
544 "Cannot create mount unit for API file system %s. Refusing.",
549 if (UNIT(m)->fragment_path && !m->parameters_fragment.what) {
550 log_error_unit(UNIT(m)->id,
551 "%s's What setting is missing. Refusing.", UNIT(m)->id);
555 if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) {
556 log_error_unit(UNIT(m)->id,
557 "%s has PAM enabled. Kill mode must be set to control-group'. Refusing.",
565 static int mount_add_extras(Mount *m) {
569 if (UNIT(m)->fragment_path)
570 m->from_fragment = true;
573 m->where = unit_name_to_path(u->id);
578 path_kill_slashes(m->where);
580 r = unit_add_exec_dependencies(u, &m->exec_context);
584 if (!UNIT(m)->description) {
585 r = unit_set_description(u, m->where);
590 r = mount_add_device_links(m);
594 r = mount_add_mount_links(m);
598 r = mount_add_socket_links(m);
602 r = mount_add_swap_links(m);
606 r = mount_add_path_links(m);
610 r = mount_add_requires_mounts_links(m);
614 r = mount_add_automount_links(m);
618 r = mount_add_quota_links(m);
622 if (UNIT(m)->default_dependencies) {
623 r = mount_add_default_dependencies(m);
628 r = unit_add_default_cgroups(u);
632 r = mount_fix_timeouts(m);
639 static int mount_load(Unit *u) {
644 assert(u->load_state == UNIT_STUB);
646 if (m->from_proc_self_mountinfo)
647 r = unit_load_fragment_and_dropin_optional(u);
649 r = unit_load_fragment_and_dropin(u);
654 /* This is a new unit? Then let's add in some extras */
655 if (u->load_state == UNIT_LOADED) {
656 r = mount_add_extras(m);
660 r = unit_exec_context_defaults(u, &m->exec_context);
665 return mount_verify(m);
668 static int mount_notify_automount(Mount *m, int status) {
675 SET_FOREACH(p, UNIT(m)->dependencies[UNIT_TRIGGERED_BY], i)
676 if (p->type == UNIT_AUTOMOUNT) {
677 r = automount_send_ready(AUTOMOUNT(p), status);
685 static void mount_set_state(Mount *m, MountState state) {
686 MountState old_state;
689 old_state = m->state;
692 if (state != MOUNT_MOUNTING &&
693 state != MOUNT_MOUNTING_DONE &&
694 state != MOUNT_REMOUNTING &&
695 state != MOUNT_UNMOUNTING &&
696 state != MOUNT_MOUNTING_SIGTERM &&
697 state != MOUNT_MOUNTING_SIGKILL &&
698 state != MOUNT_UNMOUNTING_SIGTERM &&
699 state != MOUNT_UNMOUNTING_SIGKILL &&
700 state != MOUNT_REMOUNTING_SIGTERM &&
701 state != MOUNT_REMOUNTING_SIGKILL) {
702 unit_unwatch_timer(UNIT(m), &m->timer_watch);
703 mount_unwatch_control_pid(m);
704 m->control_command = NULL;
705 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
708 if (state == MOUNT_MOUNTED ||
709 state == MOUNT_REMOUNTING)
710 mount_notify_automount(m, 0);
711 else if (state == MOUNT_DEAD ||
712 state == MOUNT_UNMOUNTING ||
713 state == MOUNT_MOUNTING_SIGTERM ||
714 state == MOUNT_MOUNTING_SIGKILL ||
715 state == MOUNT_REMOUNTING_SIGTERM ||
716 state == MOUNT_REMOUNTING_SIGKILL ||
717 state == MOUNT_UNMOUNTING_SIGTERM ||
718 state == MOUNT_UNMOUNTING_SIGKILL ||
719 state == MOUNT_FAILED) {
720 if (state != old_state)
721 mount_notify_automount(m, -ENODEV);
724 if (state != old_state)
725 log_debug_unit(UNIT(m)->id,
726 "%s changed %s -> %s",
728 mount_state_to_string(old_state),
729 mount_state_to_string(state));
731 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], m->reload_result == MOUNT_SUCCESS);
732 m->reload_result = MOUNT_SUCCESS;
735 static int mount_coldplug(Unit *u) {
737 MountState new_state = MOUNT_DEAD;
741 assert(m->state == MOUNT_DEAD);
743 if (m->deserialized_state != m->state)
744 new_state = m->deserialized_state;
745 else if (m->from_proc_self_mountinfo)
746 new_state = MOUNT_MOUNTED;
748 if (new_state != m->state) {
750 if (new_state == MOUNT_MOUNTING ||
751 new_state == MOUNT_MOUNTING_DONE ||
752 new_state == MOUNT_REMOUNTING ||
753 new_state == MOUNT_UNMOUNTING ||
754 new_state == MOUNT_MOUNTING_SIGTERM ||
755 new_state == MOUNT_MOUNTING_SIGKILL ||
756 new_state == MOUNT_UNMOUNTING_SIGTERM ||
757 new_state == MOUNT_UNMOUNTING_SIGKILL ||
758 new_state == MOUNT_REMOUNTING_SIGTERM ||
759 new_state == MOUNT_REMOUNTING_SIGKILL) {
761 if (m->control_pid <= 0)
764 r = unit_watch_pid(UNIT(m), m->control_pid);
768 r = unit_watch_timer(UNIT(m), CLOCK_MONOTONIC, true, m->timeout_usec, &m->timer_watch);
773 mount_set_state(m, new_state);
779 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
786 p = get_mount_parameters(m);
789 "%sMount State: %s\n"
793 "%sFile System Type: %s\n"
795 "%sFrom /proc/self/mountinfo: %s\n"
796 "%sFrom fragment: %s\n"
797 "%sDirectoryMode: %04o\n",
798 prefix, mount_state_to_string(m->state),
799 prefix, mount_result_to_string(m->result),
801 prefix, strna(p->what),
802 prefix, strna(p->fstype),
803 prefix, strna(p->options),
804 prefix, yes_no(m->from_proc_self_mountinfo),
805 prefix, yes_no(m->from_fragment),
806 prefix, m->directory_mode);
808 if (m->control_pid > 0)
810 "%sControl PID: %lu\n",
811 prefix, (unsigned long) m->control_pid);
813 exec_context_dump(&m->exec_context, f, prefix);
814 kill_context_dump(&m->kill_context, f, prefix);
817 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
825 r = unit_watch_timer(UNIT(m), CLOCK_MONOTONIC, true, m->timeout_usec, &m->timer_watch);
829 if ((r = exec_spawn(c,
833 UNIT(m)->manager->environment,
837 UNIT(m)->manager->confirm_spawn,
838 UNIT(m)->cgroup_bondings,
839 UNIT(m)->cgroup_attributes,
846 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
847 /* FIXME: we need to do something here */
855 unit_unwatch_timer(UNIT(m), &m->timer_watch);
860 static void mount_enter_dead(Mount *m, MountResult f) {
863 if (f != MOUNT_SUCCESS)
866 mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD);
869 static void mount_enter_mounted(Mount *m, MountResult f) {
872 if (f != MOUNT_SUCCESS)
875 mount_set_state(m, MOUNT_MOUNTED);
878 static void mount_enter_signal(Mount *m, MountState state, MountResult f) {
883 if (f != MOUNT_SUCCESS)
886 r = unit_kill_context(
889 state != MOUNT_MOUNTING_SIGTERM && state != MOUNT_UNMOUNTING_SIGTERM && state != MOUNT_REMOUNTING_SIGTERM,
897 r = unit_watch_timer(UNIT(m), CLOCK_MONOTONIC, true, m->timeout_usec, &m->timer_watch);
901 mount_set_state(m, state);
902 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
903 mount_enter_mounted(m, MOUNT_SUCCESS);
905 mount_enter_dead(m, MOUNT_SUCCESS);
910 log_warning_unit(UNIT(m)->id,
911 "%s failed to kill processes: %s", UNIT(m)->id, strerror(-r));
913 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
914 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
916 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
919 void warn_if_dir_nonempty(const char *unit, const char* where) {
923 if (dir_is_empty(where) > 0)
926 log_struct_unit(LOG_NOTICE,
928 "MESSAGE=%s: Directory %s to mount over is not empty, mounting anyway.",
931 MESSAGE_ID(SD_MESSAGE_OVERMOUNTING),
935 static void mount_enter_unmounting(Mount *m) {
940 m->control_command_id = MOUNT_EXEC_UNMOUNT;
941 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
943 if ((r = exec_command_set(
950 mount_unwatch_control_pid(m);
952 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
955 mount_set_state(m, MOUNT_UNMOUNTING);
960 log_warning_unit(UNIT(m)->id,
961 "%s failed to run 'umount' task: %s",
962 UNIT(m)->id, strerror(-r));
963 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
966 static void mount_enter_mounting(Mount *m) {
972 m->control_command_id = MOUNT_EXEC_MOUNT;
973 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
975 mkdir_p_label(m->where, m->directory_mode);
977 warn_if_dir_nonempty(m->meta.id, m->where);
979 /* Create the source directory for bind-mounts if needed */
980 p = get_mount_parameters_fragment(m);
981 if (p && mount_is_bind(p))
982 mkdir_p_label(p->what, m->directory_mode);
984 if (m->from_fragment)
985 r = exec_command_set(
988 m->parameters_fragment.what,
990 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
991 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
999 mount_unwatch_control_pid(m);
1001 r = mount_spawn(m, m->control_command, &m->control_pid);
1005 mount_set_state(m, MOUNT_MOUNTING);
1010 log_warning_unit(UNIT(m)->id,
1011 "%s failed to run 'mount' task: %s",
1012 UNIT(m)->id, strerror(-r));
1013 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
1016 static void mount_enter_mounting_done(Mount *m) {
1019 mount_set_state(m, MOUNT_MOUNTING_DONE);
1022 static void mount_enter_remounting(Mount *m) {
1027 m->control_command_id = MOUNT_EXEC_REMOUNT;
1028 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
1030 if (m->from_fragment) {
1034 if (m->parameters_fragment.options) {
1035 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
1044 r = exec_command_set(
1047 m->parameters_fragment.what,
1049 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1060 mount_unwatch_control_pid(m);
1062 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
1065 mount_set_state(m, MOUNT_REMOUNTING);
1070 log_warning_unit(UNIT(m)->id,
1071 "%s failed to run 'remount' task: %s",
1072 UNIT(m)->id, strerror(-r));
1073 m->reload_result = MOUNT_FAILURE_RESOURCES;
1074 mount_enter_mounted(m, MOUNT_SUCCESS);
1077 static int mount_start(Unit *u) {
1078 Mount *m = MOUNT(u);
1082 /* We cannot fulfill this request right now, try again later
1084 if (m->state == MOUNT_UNMOUNTING ||
1085 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1086 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1087 m->state == MOUNT_MOUNTING_SIGTERM ||
1088 m->state == MOUNT_MOUNTING_SIGKILL)
1091 /* Already on it! */
1092 if (m->state == MOUNT_MOUNTING)
1095 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1097 m->result = MOUNT_SUCCESS;
1098 m->reload_result = MOUNT_SUCCESS;
1100 mount_enter_mounting(m);
1104 static int mount_stop(Unit *u) {
1105 Mount *m = MOUNT(u);
1110 if (m->state == MOUNT_UNMOUNTING ||
1111 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1112 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1113 m->state == MOUNT_MOUNTING_SIGTERM ||
1114 m->state == MOUNT_MOUNTING_SIGKILL)
1117 assert(m->state == MOUNT_MOUNTING ||
1118 m->state == MOUNT_MOUNTING_DONE ||
1119 m->state == MOUNT_MOUNTED ||
1120 m->state == MOUNT_REMOUNTING ||
1121 m->state == MOUNT_REMOUNTING_SIGTERM ||
1122 m->state == MOUNT_REMOUNTING_SIGKILL);
1124 mount_enter_unmounting(m);
1128 static int mount_reload(Unit *u) {
1129 Mount *m = MOUNT(u);
1133 if (m->state == MOUNT_MOUNTING_DONE)
1136 assert(m->state == MOUNT_MOUNTED);
1138 mount_enter_remounting(m);
1142 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1143 Mount *m = MOUNT(u);
1149 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1150 unit_serialize_item(u, f, "result", mount_result_to_string(m->result));
1151 unit_serialize_item(u, f, "reload-result", mount_result_to_string(m->reload_result));
1153 if (m->control_pid > 0)
1154 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1156 if (m->control_command_id >= 0)
1157 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1162 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1163 Mount *m = MOUNT(u);
1170 if (streq(key, "state")) {
1173 if ((state = mount_state_from_string(value)) < 0)
1174 log_debug_unit(u->id, "Failed to parse state value %s", value);
1176 m->deserialized_state = state;
1177 } else if (streq(key, "result")) {
1180 f = mount_result_from_string(value);
1182 log_debug_unit(UNIT(m)->id,
1183 "Failed to parse result value %s", value);
1184 else if (f != MOUNT_SUCCESS)
1187 } else if (streq(key, "reload-result")) {
1190 f = mount_result_from_string(value);
1192 log_debug_unit(UNIT(m)->id,
1193 "Failed to parse reload result value %s", value);
1194 else if (f != MOUNT_SUCCESS)
1195 m->reload_result = f;
1197 } else if (streq(key, "control-pid")) {
1200 if (parse_pid(value, &pid) < 0)
1201 log_debug_unit(UNIT(m)->id,
1202 "Failed to parse control-pid value %s", value);
1204 m->control_pid = pid;
1205 } else if (streq(key, "control-command")) {
1206 MountExecCommand id;
1208 if ((id = mount_exec_command_from_string(value)) < 0)
1209 log_debug_unit(UNIT(m)->id,
1210 "Failed to parse exec-command value %s", value);
1212 m->control_command_id = id;
1213 m->control_command = m->exec_command + id;
1217 log_debug_unit(UNIT(m)->id,
1218 "Unknown serialization key '%s'", key);
1223 static UnitActiveState mount_active_state(Unit *u) {
1226 return state_translation_table[MOUNT(u)->state];
1229 static const char *mount_sub_state_to_string(Unit *u) {
1232 return mount_state_to_string(MOUNT(u)->state);
1235 static bool mount_check_gc(Unit *u) {
1236 Mount *m = MOUNT(u);
1240 return m->from_proc_self_mountinfo;
1243 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1244 Mount *m = MOUNT(u);
1250 if (pid != m->control_pid)
1255 if (is_clean_exit(code, status, NULL))
1257 else if (code == CLD_EXITED)
1258 f = MOUNT_FAILURE_EXIT_CODE;
1259 else if (code == CLD_KILLED)
1260 f = MOUNT_FAILURE_SIGNAL;
1261 else if (code == CLD_DUMPED)
1262 f = MOUNT_FAILURE_CORE_DUMP;
1264 assert_not_reached("Unknown code");
1266 if (f != MOUNT_SUCCESS)
1269 if (m->control_command) {
1270 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1272 m->control_command = NULL;
1273 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1276 log_full_unit(f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
1277 "%s mount process exited, code=%s status=%i",
1278 u->id, sigchld_code_to_string(code), status);
1280 /* Note that mount(8) returning and the kernel sending us a
1281 * mount table change event might happen out-of-order. If an
1282 * operation succeed we assume the kernel will follow soon too
1283 * and already change into the resulting state. If it fails
1284 * we check if the kernel still knows about the mount. and
1285 * change state accordingly. */
1289 case MOUNT_MOUNTING:
1290 case MOUNT_MOUNTING_DONE:
1291 case MOUNT_MOUNTING_SIGKILL:
1292 case MOUNT_MOUNTING_SIGTERM:
1294 if (f == MOUNT_SUCCESS)
1295 mount_enter_mounted(m, f);
1296 else if (m->from_proc_self_mountinfo)
1297 mount_enter_mounted(m, f);
1299 mount_enter_dead(m, f);
1302 case MOUNT_REMOUNTING:
1303 case MOUNT_REMOUNTING_SIGKILL:
1304 case MOUNT_REMOUNTING_SIGTERM:
1306 m->reload_result = f;
1307 if (m->from_proc_self_mountinfo)
1308 mount_enter_mounted(m, MOUNT_SUCCESS);
1310 mount_enter_dead(m, MOUNT_SUCCESS);
1314 case MOUNT_UNMOUNTING:
1315 case MOUNT_UNMOUNTING_SIGKILL:
1316 case MOUNT_UNMOUNTING_SIGTERM:
1318 if (f == MOUNT_SUCCESS)
1319 mount_enter_dead(m, f);
1320 else if (m->from_proc_self_mountinfo)
1321 mount_enter_mounted(m, f);
1323 mount_enter_dead(m, f);
1327 assert_not_reached("Uh, control process died at wrong time.");
1330 /* Notify clients about changed exit status */
1331 unit_add_to_dbus_queue(u);
1334 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1335 Mount *m = MOUNT(u);
1338 assert(elapsed == 1);
1339 assert(w == &m->timer_watch);
1343 case MOUNT_MOUNTING:
1344 case MOUNT_MOUNTING_DONE:
1345 log_warning_unit(u->id,
1346 "%s mounting timed out. Stopping.", u->id);
1347 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1350 case MOUNT_REMOUNTING:
1351 log_warning_unit(u->id,
1352 "%s remounting timed out. Stopping.", u->id);
1353 m->reload_result = MOUNT_FAILURE_TIMEOUT;
1354 mount_enter_mounted(m, MOUNT_SUCCESS);
1357 case MOUNT_UNMOUNTING:
1358 log_warning_unit(u->id,
1359 "%s unmounting timed out. Stopping.", u->id);
1360 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1363 case MOUNT_MOUNTING_SIGTERM:
1364 if (m->kill_context.send_sigkill) {
1365 log_warning_unit(u->id,
1366 "%s mounting timed out. Killing.", u->id);
1367 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1369 log_warning_unit(u->id,
1370 "%s mounting timed out. Skipping SIGKILL. Ignoring.",
1373 if (m->from_proc_self_mountinfo)
1374 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1376 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1380 case MOUNT_REMOUNTING_SIGTERM:
1381 if (m->kill_context.send_sigkill) {
1382 log_warning_unit(u->id,
1383 "%s remounting timed out. Killing.", u->id);
1384 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1386 log_warning_unit(u->id,
1387 "%s remounting timed out. Skipping SIGKILL. Ignoring.",
1390 if (m->from_proc_self_mountinfo)
1391 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1393 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1397 case MOUNT_UNMOUNTING_SIGTERM:
1398 if (m->kill_context.send_sigkill) {
1399 log_warning_unit(u->id,
1400 "%s unmounting timed out. Killing.", u->id);
1401 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1403 log_warning_unit(u->id,
1404 "%s unmounting timed out. Skipping SIGKILL. Ignoring.",
1407 if (m->from_proc_self_mountinfo)
1408 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1410 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1414 case MOUNT_MOUNTING_SIGKILL:
1415 case MOUNT_REMOUNTING_SIGKILL:
1416 case MOUNT_UNMOUNTING_SIGKILL:
1417 log_warning_unit(u->id,
1418 "%s mount process still around after SIGKILL. Ignoring.",
1421 if (m->from_proc_self_mountinfo)
1422 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1424 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1428 assert_not_reached("Timeout at wrong time.");
1432 static int mount_add_one(
1436 const char *options,
1443 char *e, *w = NULL, *o = NULL, *s = NULL, *f = NULL;
1445 bool load_extras = false;
1453 /* Ignore API mount points. They should never be referenced in
1454 * dependencies ever. */
1455 if (mount_point_is_api(where) || mount_point_ignore(where))
1458 if (streq(fstype, "autofs"))
1461 /* probably some kind of swap, ignore */
1462 if (!is_path(where))
1465 e = unit_name_from_path(where, ".mount");
1469 u = manager_get_unit(m, e);
1473 u = unit_new(m, sizeof(Mount));
1479 r = unit_add_name(u, e);
1485 MOUNT(u)->where = strdup(where);
1486 if (!MOUNT(u)->where) {
1491 unit_add_to_load_queue(u);
1496 if (!MOUNT(u)->where) {
1497 MOUNT(u)->where = strdup(where);
1498 if (!MOUNT(u)->where) {
1504 if (u->load_state == UNIT_ERROR) {
1505 u->load_state = UNIT_LOADED;
1508 /* Load in the extras later on, after we
1509 * finished initialization of the unit */
1514 if (!(w = strdup(what)) ||
1515 !(o = strdup(options)) ||
1516 !(s = strdup("/proc/self/mountinfo")) ||
1517 !(f = strdup(fstype))) {
1522 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1524 MOUNT(u)->is_mounted = true;
1525 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1526 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1529 MOUNT(u)->from_proc_self_mountinfo = true;
1530 free(u->source_path);
1545 r = mount_add_extras(MOUNT(u));
1550 unit_add_to_dbus_queue(u);
1566 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1569 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1573 rewind(m->proc_self_mountinfo);
1578 device = path = options = options2 = fstype = d = p = o = NULL;
1580 if ((k = fscanf(m->proc_self_mountinfo,
1581 "%*s " /* (1) mount id */
1582 "%*s " /* (2) parent id */
1583 "%*s " /* (3) major:minor */
1584 "%*s " /* (4) root */
1585 "%ms " /* (5) mount point */
1586 "%ms" /* (6) mount options */
1587 "%*[^-]" /* (7) optional fields */
1588 "- " /* (8) separator */
1589 "%ms " /* (9) file system type */
1590 "%ms" /* (10) mount source */
1591 "%ms" /* (11) mount options 2 */
1592 "%*[^\n]", /* some rubbish at the end */
1602 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1606 o = strjoin(options, ",", options2, NULL);
1612 if (!(d = cunescape(device)) ||
1613 !(p = cunescape(path))) {
1618 if ((k = mount_add_one(m, d, p, o, fstype, 0, set_flags)) < 0)
1645 static void mount_shutdown(Manager *m) {
1648 if (m->proc_self_mountinfo) {
1649 fclose(m->proc_self_mountinfo);
1650 m->proc_self_mountinfo = NULL;
1654 static int mount_enumerate(Manager *m) {
1656 struct epoll_event ev;
1659 if (!m->proc_self_mountinfo) {
1660 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1663 m->mount_watch.type = WATCH_MOUNT;
1664 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1667 ev.events = EPOLLPRI;
1668 ev.data.ptr = &m->mount_watch;
1670 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1674 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1684 void mount_fd_event(Manager *m, int events) {
1689 assert(events & EPOLLPRI);
1691 /* The manager calls this for every fd event happening on the
1692 * /proc/self/mountinfo file, which informs us about mounting
1695 r = mount_load_proc_self_mountinfo(m, true);
1697 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1699 /* Reset flags, just in case, for later calls */
1700 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1701 Mount *mount = MOUNT(u);
1703 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1709 manager_dispatch_load_queue(m);
1711 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1712 Mount *mount = MOUNT(u);
1714 if (!mount->is_mounted) {
1715 /* This has just been unmounted. */
1717 mount->from_proc_self_mountinfo = false;
1719 switch (mount->state) {
1722 mount_enter_dead(mount, MOUNT_SUCCESS);
1726 mount_set_state(mount, mount->state);
1731 } else if (mount->just_mounted || mount->just_changed) {
1733 /* New or changed mount entry */
1735 switch (mount->state) {
1739 mount_enter_mounted(mount, MOUNT_SUCCESS);
1742 case MOUNT_MOUNTING:
1743 mount_enter_mounting_done(mount);
1747 /* Nothing really changed, but let's
1748 * issue an notification call
1749 * nonetheless, in case somebody is
1750 * waiting for this. (e.g. file system
1751 * ro/rw remounts.) */
1752 mount_set_state(mount, mount->state);
1757 /* Reset the flags for later calls */
1758 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1762 static void mount_reset_failed(Unit *u) {
1763 Mount *m = MOUNT(u);
1767 if (m->state == MOUNT_FAILED)
1768 mount_set_state(m, MOUNT_DEAD);
1770 m->result = MOUNT_SUCCESS;
1771 m->reload_result = MOUNT_SUCCESS;
1774 static int mount_kill(Unit *u, KillWho who, int signo, DBusError *error) {
1775 Mount *m = MOUNT(u);
1777 Set *pid_set = NULL;
1781 if (who == KILL_MAIN) {
1782 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1786 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1787 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1791 if (who == KILL_CONTROL || who == KILL_ALL)
1792 if (m->control_pid > 0)
1793 if (kill(m->control_pid, signo) < 0)
1796 if (who == KILL_ALL) {
1799 pid_set = set_new(trivial_hash_func, trivial_compare_func);
1803 /* Exclude the control pid from being killed via the cgroup */
1804 if (m->control_pid > 0) {
1805 q = set_put(pid_set, LONG_TO_PTR(m->control_pid));
1812 q = cgroup_bonding_kill_list(UNIT(m)->cgroup_bondings, signo, false, false, pid_set, NULL);
1813 if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT)
1824 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1825 [MOUNT_DEAD] = "dead",
1826 [MOUNT_MOUNTING] = "mounting",
1827 [MOUNT_MOUNTING_DONE] = "mounting-done",
1828 [MOUNT_MOUNTED] = "mounted",
1829 [MOUNT_REMOUNTING] = "remounting",
1830 [MOUNT_UNMOUNTING] = "unmounting",
1831 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1832 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1833 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1834 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1835 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1836 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1837 [MOUNT_FAILED] = "failed"
1840 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1842 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1843 [MOUNT_EXEC_MOUNT] = "ExecMount",
1844 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1845 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1848 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1850 static const char* const mount_result_table[_MOUNT_RESULT_MAX] = {
1851 [MOUNT_SUCCESS] = "success",
1852 [MOUNT_FAILURE_RESOURCES] = "resources",
1853 [MOUNT_FAILURE_TIMEOUT] = "timeout",
1854 [MOUNT_FAILURE_EXIT_CODE] = "exit-code",
1855 [MOUNT_FAILURE_SIGNAL] = "signal",
1856 [MOUNT_FAILURE_CORE_DUMP] = "core-dump"
1859 DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult);
1861 const UnitVTable mount_vtable = {
1862 .object_size = sizeof(Mount),
1869 .exec_context_offset = offsetof(Mount, exec_context),
1870 .exec_section = "Mount",
1873 .no_instances = true,
1879 .coldplug = mount_coldplug,
1883 .start = mount_start,
1885 .reload = mount_reload,
1889 .serialize = mount_serialize,
1890 .deserialize_item = mount_deserialize_item,
1892 .active_state = mount_active_state,
1893 .sub_state_to_string = mount_sub_state_to_string,
1895 .check_gc = mount_check_gc,
1897 .sigchld_event = mount_sigchld_event,
1898 .timer_event = mount_timer_event,
1900 .reset_failed = mount_reset_failed,
1902 .bus_interface = "org.freedesktop.systemd1.Mount",
1903 .bus_message_handler = bus_mount_message_handler,
1904 .bus_invalidating_properties = bus_mount_invalidating_properties,
1906 .enumerate = mount_enumerate,
1907 .shutdown = mount_shutdown,
1909 .status_message_formats = {
1910 .starting_stopping = {
1911 [0] = "Mounting %s...",
1912 [1] = "Unmounting %s...",
1914 .finished_start_job = {
1915 [JOB_DONE] = "Mounted %s.",
1916 [JOB_FAILED] = "Failed to mount %s.",
1917 [JOB_DEPENDENCY] = "Dependency failed for %s.",
1918 [JOB_TIMEOUT] = "Timed out mounting %s.",
1920 .finished_stop_job = {
1921 [JOB_DONE] = "Unmounted %s.",
1922 [JOB_FAILED] = "Failed unmounting %s.",
1923 [JOB_TIMEOUT] = "Timed out unmounting %s.",