2 This file is part of systemd.
4 Copyright 2010 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 #include <sys/epoll.h>
25 #include "sd-messages.h"
27 #include "alloc-util.h"
28 #include "dbus-mount.h"
30 #include "exit-status.h"
31 #include "formats-util.h"
32 #include "fstab-util.h"
36 #include "mount-setup.h"
37 #include "mount-util.h"
39 #include "parse-util.h"
40 #include "path-util.h"
41 #include "process-util.h"
43 #include "string-table.h"
44 #include "string-util.h"
46 #include "unit-name.h"
49 #define RETRY_UMOUNT_MAX 32
51 DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_table
*, mnt_free_table
);
52 DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_iter
*, mnt_free_iter
);
54 static const UnitActiveState state_translation_table
[_MOUNT_STATE_MAX
] = {
55 [MOUNT_DEAD
] = UNIT_INACTIVE
,
56 [MOUNT_MOUNTING
] = UNIT_ACTIVATING
,
57 [MOUNT_MOUNTING_DONE
] = UNIT_ACTIVE
,
58 [MOUNT_MOUNTED
] = UNIT_ACTIVE
,
59 [MOUNT_REMOUNTING
] = UNIT_RELOADING
,
60 [MOUNT_UNMOUNTING
] = UNIT_DEACTIVATING
,
61 [MOUNT_MOUNTING_SIGTERM
] = UNIT_DEACTIVATING
,
62 [MOUNT_MOUNTING_SIGKILL
] = UNIT_DEACTIVATING
,
63 [MOUNT_REMOUNTING_SIGTERM
] = UNIT_RELOADING
,
64 [MOUNT_REMOUNTING_SIGKILL
] = UNIT_RELOADING
,
65 [MOUNT_UNMOUNTING_SIGTERM
] = UNIT_DEACTIVATING
,
66 [MOUNT_UNMOUNTING_SIGKILL
] = UNIT_DEACTIVATING
,
67 [MOUNT_FAILED
] = UNIT_FAILED
70 static int mount_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
71 static int mount_dispatch_io(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
);
73 static bool mount_needs_network(const char *options
, const char *fstype
) {
74 if (fstab_test_option(options
, "_netdev\0"))
77 if (fstype
&& fstype_is_network(fstype
))
83 static bool mount_is_network(const MountParameters
*p
) {
86 return mount_needs_network(p
->options
, p
->fstype
);
89 static bool mount_is_loop(const MountParameters
*p
) {
92 if (fstab_test_option(p
->options
, "loop\0"))
98 static bool mount_is_bind(const MountParameters
*p
) {
101 if (fstab_test_option(p
->options
, "bind\0" "rbind\0"))
104 if (p
->fstype
&& STR_IN_SET(p
->fstype
, "bind", "rbind"))
110 static bool mount_is_auto(const MountParameters
*p
) {
113 return !fstab_test_option(p
->options
, "noauto\0");
116 static bool mount_is_automount(const MountParameters
*p
) {
119 return fstab_test_option(p
->options
,
120 "comment=systemd.automount\0"
121 "x-systemd.automount\0");
124 static bool mount_state_active(MountState state
) {
130 MOUNT_MOUNTING_SIGTERM
,
131 MOUNT_MOUNTING_SIGKILL
,
132 MOUNT_UNMOUNTING_SIGTERM
,
133 MOUNT_UNMOUNTING_SIGKILL
,
134 MOUNT_REMOUNTING_SIGTERM
,
135 MOUNT_REMOUNTING_SIGKILL
);
138 static bool needs_quota(const MountParameters
*p
) {
141 /* Quotas are not enabled on network filesystems,
142 * but we want them, for example, on storage connected via iscsi */
143 if (p
->fstype
&& fstype_is_network(p
->fstype
))
146 if (mount_is_bind(p
))
149 return fstab_test_option(p
->options
,
150 "usrquota\0" "grpquota\0" "quota\0" "usrjquota\0" "grpjquota\0");
153 static void mount_init(Unit
*u
) {
157 assert(u
->load_state
== UNIT_STUB
);
159 m
->timeout_usec
= u
->manager
->default_timeout_start_usec
;
160 m
->directory_mode
= 0755;
162 /* We need to make sure that /usr/bin/mount is always called
163 * in the same process group as us, so that the autofs kernel
164 * side doesn't send us another mount request while we are
165 * already trying to comply its last one. */
166 m
->exec_context
.same_pgrp
= true;
168 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
170 u
->ignore_on_isolate
= true;
173 static int mount_arm_timer(Mount
*m
, usec_t usec
) {
178 if (m
->timer_event_source
) {
179 r
= sd_event_source_set_time(m
->timer_event_source
, usec
);
183 return sd_event_source_set_enabled(m
->timer_event_source
, SD_EVENT_ONESHOT
);
186 if (usec
== USEC_INFINITY
)
189 r
= sd_event_add_time(
190 UNIT(m
)->manager
->event
,
191 &m
->timer_event_source
,
194 mount_dispatch_timer
, m
);
198 (void) sd_event_source_set_description(m
->timer_event_source
, "mount-timer");
203 static void mount_unwatch_control_pid(Mount
*m
) {
206 if (m
->control_pid
<= 0)
209 unit_unwatch_pid(UNIT(m
), m
->control_pid
);
213 static void mount_parameters_done(MountParameters
*p
) {
220 p
->what
= p
->options
= p
->fstype
= NULL
;
223 static void mount_done(Unit
*u
) {
228 m
->where
= mfree(m
->where
);
230 mount_parameters_done(&m
->parameters_proc_self_mountinfo
);
231 mount_parameters_done(&m
->parameters_fragment
);
233 m
->exec_runtime
= exec_runtime_unref(m
->exec_runtime
);
234 exec_command_done_array(m
->exec_command
, _MOUNT_EXEC_COMMAND_MAX
);
235 m
->control_command
= NULL
;
237 dynamic_creds_unref(&m
->dynamic_creds
);
239 mount_unwatch_control_pid(m
);
241 m
->timer_event_source
= sd_event_source_unref(m
->timer_event_source
);
244 _pure_
static MountParameters
* get_mount_parameters_fragment(Mount
*m
) {
247 if (m
->from_fragment
)
248 return &m
->parameters_fragment
;
253 _pure_
static MountParameters
* get_mount_parameters(Mount
*m
) {
256 if (m
->from_proc_self_mountinfo
)
257 return &m
->parameters_proc_self_mountinfo
;
259 return get_mount_parameters_fragment(m
);
262 static int mount_add_mount_links(Mount
*m
) {
263 _cleanup_free_
char *parent
= NULL
;
272 if (!path_equal(m
->where
, "/")) {
273 /* Adds in links to other mount points that might lie further
274 * up in the hierarchy */
276 parent
= dirname_malloc(m
->where
);
280 r
= unit_require_mounts_for(UNIT(m
), parent
);
285 /* Adds in links to other mount points that might be needed
286 * for the source path (if this is a bind mount or a loop mount) to be
288 pm
= get_mount_parameters_fragment(m
);
289 if (pm
&& pm
->what
&&
290 path_is_absolute(pm
->what
) &&
291 (mount_is_bind(pm
) || mount_is_loop(pm
) || !mount_is_network(pm
))) {
293 r
= unit_require_mounts_for(UNIT(m
), pm
->what
);
298 /* Adds in links to other units that use this path or paths
299 * further down in the hierarchy */
300 s
= manager_get_units_requiring_mounts_for(UNIT(m
)->manager
, m
->where
);
301 SET_FOREACH(other
, s
, i
) {
303 if (other
->load_state
!= UNIT_LOADED
)
306 if (other
== UNIT(m
))
309 r
= unit_add_dependency(other
, UNIT_AFTER
, UNIT(m
), true);
313 if (UNIT(m
)->fragment_path
) {
314 /* If we have fragment configuration, then make this dependency required */
315 r
= unit_add_dependency(other
, UNIT_REQUIRES
, UNIT(m
), true);
324 static int mount_add_device_links(Mount
*m
) {
326 bool device_wants_mount
= false;
331 p
= get_mount_parameters(m
);
338 if (mount_is_bind(p
))
341 if (!is_device_path(p
->what
))
344 /* /dev/root is a really weird thing, it's not a real device,
345 * but just a path the kernel exports for the root file system
346 * specified on the kernel command line. Ignore it here. */
347 if (path_equal(p
->what
, "/dev/root"))
350 if (path_equal(m
->where
, "/"))
353 if (mount_is_auto(p
) && !mount_is_automount(p
) && MANAGER_IS_SYSTEM(UNIT(m
)->manager
))
354 device_wants_mount
= true;
356 r
= unit_add_node_link(UNIT(m
), p
->what
, device_wants_mount
, m
->from_fragment
? UNIT_BINDS_TO
: UNIT_REQUIRES
);
363 static int mount_add_quota_links(Mount
*m
) {
369 if (!MANAGER_IS_SYSTEM(UNIT(m
)->manager
))
372 p
= get_mount_parameters_fragment(m
);
379 r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_BEFORE
, UNIT_WANTS
, SPECIAL_QUOTACHECK_SERVICE
, NULL
, true);
383 r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_BEFORE
, UNIT_WANTS
, SPECIAL_QUOTAON_SERVICE
, NULL
, true);
390 static bool should_umount(Mount
*m
) {
393 if (PATH_IN_SET(m
->where
, "/", "/usr") ||
394 path_startswith(m
->where
, "/run/initramfs"))
397 p
= get_mount_parameters(m
);
398 if (p
&& fstab_test_option(p
->options
, "x-initrd.mount\0") &&
405 static int mount_add_default_dependencies(Mount
*m
) {
412 if (!UNIT(m
)->default_dependencies
)
415 if (!MANAGER_IS_SYSTEM(UNIT(m
)->manager
))
418 /* We do not add any default dependencies to /, /usr or
419 * /run/initramfs/, since they are guaranteed to stay
420 * mounted the whole time, since our system is on it.
421 * Also, don't bother with anything mounted below virtual
422 * file systems, it's also going to be virtual, and hence
423 * not worth the effort. */
424 if (PATH_IN_SET(m
->where
, "/", "/usr") ||
425 path_startswith(m
->where
, "/run/initramfs") ||
426 path_startswith(m
->where
, "/proc") ||
427 path_startswith(m
->where
, "/sys") ||
428 path_startswith(m
->where
, "/dev"))
431 p
= get_mount_parameters(m
);
435 if (mount_is_network(p
)) {
436 /* We order ourselves after network.target. This is
437 * primarily useful at shutdown: services that take
438 * down the network should order themselves before
439 * network.target, so that they are shut down only
440 * after this mount unit is stopped. */
442 r
= unit_add_dependency_by_name(UNIT(m
), UNIT_AFTER
, SPECIAL_NETWORK_TARGET
, NULL
, true);
446 /* We pull in network-online.target, and order
447 * ourselves after it. This is useful at start-up to
448 * actively pull in tools that want to be started
449 * before we start mounting network file systems, and
450 * whose purpose it is to delay this until the network
453 r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_WANTS
, UNIT_AFTER
, SPECIAL_NETWORK_ONLINE_TARGET
, NULL
, true);
457 after
= SPECIAL_REMOTE_FS_PRE_TARGET
;
459 after
= SPECIAL_LOCAL_FS_PRE_TARGET
;
461 r
= unit_add_dependency_by_name(UNIT(m
), UNIT_AFTER
, after
, NULL
, true);
465 if (should_umount(m
)) {
466 r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_UMOUNT_TARGET
, NULL
, true);
474 static int mount_verify(Mount
*m
) {
475 _cleanup_free_
char *e
= NULL
;
481 if (UNIT(m
)->load_state
!= UNIT_LOADED
)
484 if (!m
->from_fragment
&& !m
->from_proc_self_mountinfo
)
487 r
= unit_name_from_path(m
->where
, ".mount", &e
);
489 return log_unit_error_errno(UNIT(m
), r
, "Failed to generate unit name from mount path: %m");
491 if (!unit_has_name(UNIT(m
), e
)) {
492 log_unit_error(UNIT(m
), "Where= setting doesn't match unit name. Refusing.");
496 if (mount_point_is_api(m
->where
) || mount_point_ignore(m
->where
)) {
497 log_unit_error(UNIT(m
), "Cannot create mount unit for API file system %s. Refusing.", m
->where
);
501 p
= get_mount_parameters_fragment(m
);
503 log_unit_error(UNIT(m
), "What= setting is missing. Refusing.");
507 if (m
->exec_context
.pam_name
&& m
->kill_context
.kill_mode
!= KILL_CONTROL_GROUP
) {
508 log_unit_error(UNIT(m
), "Unit has PAM enabled. Kill mode must be set to control-group'. Refusing.");
515 static int mount_add_extras(Mount
*m
) {
521 if (u
->fragment_path
)
522 m
->from_fragment
= true;
525 r
= unit_name_to_path(u
->id
, &m
->where
);
530 path_kill_slashes(m
->where
);
532 if (!u
->description
) {
533 r
= unit_set_description(u
, m
->where
);
538 r
= mount_add_device_links(m
);
542 r
= mount_add_mount_links(m
);
546 r
= mount_add_quota_links(m
);
550 r
= unit_patch_contexts(u
);
554 r
= unit_add_exec_dependencies(u
, &m
->exec_context
);
558 r
= unit_set_default_slice(u
);
562 r
= mount_add_default_dependencies(m
);
569 static int mount_load_root_mount(Unit
*u
) {
572 if (!unit_has_name(u
, SPECIAL_ROOT_MOUNT
))
576 u
->default_dependencies
= false;
578 /* The stdio/kmsg bridge socket is on /, in order to avoid a dep loop, don't use kmsg logging for -.mount */
579 MOUNT(u
)->exec_context
.std_output
= EXEC_OUTPUT_NULL
;
580 MOUNT(u
)->exec_context
.std_input
= EXEC_INPUT_NULL
;
583 u
->description
= strdup("Root Mount");
588 static int mount_load(Unit
*u
) {
593 assert(u
->load_state
== UNIT_STUB
);
595 r
= mount_load_root_mount(u
);
599 if (m
->from_proc_self_mountinfo
|| u
->perpetual
)
600 r
= unit_load_fragment_and_dropin_optional(u
);
602 r
= unit_load_fragment_and_dropin(u
);
606 /* This is a new unit? Then let's add in some extras */
607 if (u
->load_state
== UNIT_LOADED
) {
608 r
= mount_add_extras(m
);
613 return mount_verify(m
);
616 static void mount_set_state(Mount
*m
, MountState state
) {
617 MountState old_state
;
620 old_state
= m
->state
;
623 if (!mount_state_active(state
)) {
624 m
->timer_event_source
= sd_event_source_unref(m
->timer_event_source
);
625 mount_unwatch_control_pid(m
);
626 m
->control_command
= NULL
;
627 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
630 if (state
!= old_state
)
631 log_unit_debug(UNIT(m
), "Changed %s -> %s", mount_state_to_string(old_state
), mount_state_to_string(state
));
633 unit_notify(UNIT(m
), state_translation_table
[old_state
], state_translation_table
[state
], m
->reload_result
== MOUNT_SUCCESS
);
634 m
->reload_result
= MOUNT_SUCCESS
;
637 static int mount_coldplug(Unit
*u
) {
639 MountState new_state
= MOUNT_DEAD
;
643 assert(m
->state
== MOUNT_DEAD
);
645 if (m
->deserialized_state
!= m
->state
)
646 new_state
= m
->deserialized_state
;
647 else if (m
->from_proc_self_mountinfo
)
648 new_state
= MOUNT_MOUNTED
;
650 if (new_state
== m
->state
)
653 if (m
->control_pid
> 0 &&
654 pid_is_unwaited(m
->control_pid
) &&
655 mount_state_active(new_state
)) {
657 r
= unit_watch_pid(UNIT(m
), m
->control_pid
);
661 r
= mount_arm_timer(m
, usec_add(u
->state_change_timestamp
.monotonic
, m
->timeout_usec
));
666 if (!IN_SET(new_state
, MOUNT_DEAD
, MOUNT_FAILED
))
667 (void) unit_setup_dynamic_creds(u
);
669 mount_set_state(m
, new_state
);
673 static void mount_dump(Unit
*u
, FILE *f
, const char *prefix
) {
680 p
= get_mount_parameters(m
);
683 "%sMount State: %s\n"
687 "%sFile System Type: %s\n"
689 "%sFrom /proc/self/mountinfo: %s\n"
690 "%sFrom fragment: %s\n"
691 "%sDirectoryMode: %04o\n"
692 "%sSloppyOptions: %s\n"
693 "%sLazyUnmount: %s\n"
694 "%sForceUnmount: %s\n",
695 prefix
, mount_state_to_string(m
->state
),
696 prefix
, mount_result_to_string(m
->result
),
698 prefix
, p
? strna(p
->what
) : "n/a",
699 prefix
, p
? strna(p
->fstype
) : "n/a",
700 prefix
, p
? strna(p
->options
) : "n/a",
701 prefix
, yes_no(m
->from_proc_self_mountinfo
),
702 prefix
, yes_no(m
->from_fragment
),
703 prefix
, m
->directory_mode
,
704 prefix
, yes_no(m
->sloppy_options
),
705 prefix
, yes_no(m
->lazy_unmount
),
706 prefix
, yes_no(m
->force_unmount
));
708 if (m
->control_pid
> 0)
710 "%sControl PID: "PID_FMT
"\n",
711 prefix
, m
->control_pid
);
713 exec_context_dump(&m
->exec_context
, f
, prefix
);
714 kill_context_dump(&m
->kill_context
, f
, prefix
);
717 static int mount_spawn(Mount
*m
, ExecCommand
*c
, pid_t
*_pid
) {
720 ExecParameters exec_params
= {
721 .flags
= EXEC_APPLY_PERMISSIONS
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
,
731 (void) unit_realize_cgroup(UNIT(m
));
732 if (m
->reset_cpu_usage
) {
733 (void) unit_reset_cpu_usage(UNIT(m
));
734 m
->reset_cpu_usage
= false;
737 r
= unit_setup_exec_runtime(UNIT(m
));
741 r
= unit_setup_dynamic_creds(UNIT(m
));
745 r
= mount_arm_timer(m
, usec_add(now(CLOCK_MONOTONIC
), m
->timeout_usec
));
749 exec_params
.environment
= UNIT(m
)->manager
->environment
;
750 exec_params
.flags
|= UNIT(m
)->manager
->confirm_spawn
? EXEC_CONFIRM_SPAWN
: 0;
751 exec_params
.cgroup_supported
= UNIT(m
)->manager
->cgroup_supported
;
752 exec_params
.cgroup_path
= UNIT(m
)->cgroup_path
;
753 exec_params
.cgroup_delegate
= m
->cgroup_context
.delegate
;
754 exec_params
.runtime_prefix
= manager_get_runtime_prefix(UNIT(m
)->manager
);
756 r
= exec_spawn(UNIT(m
),
766 r
= unit_watch_pid(UNIT(m
), pid
);
768 /* FIXME: we need to do something here */
776 static void mount_enter_dead(Mount
*m
, MountResult f
) {
779 if (m
->result
== MOUNT_SUCCESS
)
782 mount_set_state(m
, m
->result
!= MOUNT_SUCCESS
? MOUNT_FAILED
: MOUNT_DEAD
);
784 exec_runtime_destroy(m
->exec_runtime
);
785 m
->exec_runtime
= exec_runtime_unref(m
->exec_runtime
);
787 exec_context_destroy_runtime_directory(&m
->exec_context
, manager_get_runtime_prefix(UNIT(m
)->manager
));
789 unit_unref_uid_gid(UNIT(m
), true);
791 dynamic_creds_destroy(&m
->dynamic_creds
);
794 static void mount_enter_mounted(Mount
*m
, MountResult f
) {
797 if (m
->result
== MOUNT_SUCCESS
)
800 mount_set_state(m
, MOUNT_MOUNTED
);
803 static void mount_enter_signal(Mount
*m
, MountState state
, MountResult f
) {
808 if (m
->result
== MOUNT_SUCCESS
)
811 r
= unit_kill_context(
814 (state
!= MOUNT_MOUNTING_SIGTERM
&& state
!= MOUNT_UNMOUNTING_SIGTERM
&& state
!= MOUNT_REMOUNTING_SIGTERM
) ?
815 KILL_KILL
: KILL_TERMINATE
,
823 r
= mount_arm_timer(m
, usec_add(now(CLOCK_MONOTONIC
), m
->timeout_usec
));
827 mount_set_state(m
, state
);
828 } else if (state
== MOUNT_REMOUNTING_SIGTERM
)
829 mount_enter_signal(m
, MOUNT_REMOUNTING_SIGKILL
, MOUNT_SUCCESS
);
830 else if (state
== MOUNT_REMOUNTING_SIGKILL
)
831 mount_enter_mounted(m
, MOUNT_SUCCESS
);
832 else if (state
== MOUNT_MOUNTING_SIGTERM
)
833 mount_enter_signal(m
, MOUNT_MOUNTING_SIGKILL
, MOUNT_SUCCESS
);
834 else if (state
== MOUNT_UNMOUNTING_SIGTERM
)
835 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGKILL
, MOUNT_SUCCESS
);
837 mount_enter_dead(m
, MOUNT_SUCCESS
);
842 log_unit_warning_errno(UNIT(m
), r
, "Failed to kill processes: %m");
844 if (IN_SET(state
, MOUNT_REMOUNTING_SIGTERM
, MOUNT_REMOUNTING_SIGKILL
))
845 mount_enter_mounted(m
, MOUNT_FAILURE_RESOURCES
);
847 mount_enter_dead(m
, MOUNT_FAILURE_RESOURCES
);
850 static void mount_enter_unmounting(Mount
*m
) {
855 /* Start counting our attempts */
856 if (!IN_SET(m
->state
,
858 MOUNT_UNMOUNTING_SIGTERM
,
859 MOUNT_UNMOUNTING_SIGKILL
))
860 m
->n_retry_umount
= 0;
862 m
->control_command_id
= MOUNT_EXEC_UNMOUNT
;
863 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_UNMOUNT
;
865 r
= exec_command_set(m
->control_command
, UMOUNT_PATH
, m
->where
, NULL
);
866 if (r
>= 0 && m
->lazy_unmount
)
867 r
= exec_command_append(m
->control_command
, "-l", NULL
);
868 if (r
>= 0 && m
->force_unmount
)
869 r
= exec_command_append(m
->control_command
, "-f", NULL
);
873 mount_unwatch_control_pid(m
);
875 r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
);
879 mount_set_state(m
, MOUNT_UNMOUNTING
);
884 log_unit_warning_errno(UNIT(m
), r
, "Failed to run 'umount' task: %m");
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 r
= unit_fail_if_symlink(UNIT(m
), m
->where
);
901 (void) mkdir_p_label(m
->where
, m
->directory_mode
);
903 unit_warn_if_dir_nonempty(UNIT(m
), m
->where
);
905 /* Create the source directory for bind-mounts if needed */
906 p
= get_mount_parameters_fragment(m
);
907 if (p
&& mount_is_bind(p
))
908 (void) mkdir_p_label(p
->what
, m
->directory_mode
);
911 _cleanup_free_
char *opts
= NULL
;
913 r
= fstab_filter_options(p
->options
, "nofail\0" "noauto\0" "auto\0", NULL
, NULL
, &opts
);
917 r
= exec_command_set(m
->control_command
, MOUNT_PATH
, p
->what
, m
->where
, NULL
);
918 if (r
>= 0 && m
->sloppy_options
)
919 r
= exec_command_append(m
->control_command
, "-s", NULL
);
920 if (r
>= 0 && p
->fstype
)
921 r
= exec_command_append(m
->control_command
, "-t", p
->fstype
, NULL
);
922 if (r
>= 0 && !isempty(opts
))
923 r
= exec_command_append(m
->control_command
, "-o", opts
, NULL
);
930 mount_unwatch_control_pid(m
);
932 r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
);
936 mount_set_state(m
, MOUNT_MOUNTING
);
941 log_unit_warning_errno(UNIT(m
), r
, "Failed to run 'mount' task: %m");
942 mount_enter_dead(m
, MOUNT_FAILURE_RESOURCES
);
945 static void mount_enter_remounting(Mount
*m
) {
951 m
->control_command_id
= MOUNT_EXEC_REMOUNT
;
952 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_REMOUNT
;
954 p
= get_mount_parameters_fragment(m
);
959 o
= strjoina("remount,", p
->options
);
963 r
= exec_command_set(m
->control_command
, MOUNT_PATH
,
966 if (r
>= 0 && m
->sloppy_options
)
967 r
= exec_command_append(m
->control_command
, "-s", NULL
);
968 if (r
>= 0 && p
->fstype
)
969 r
= exec_command_append(m
->control_command
, "-t", p
->fstype
, NULL
);
976 mount_unwatch_control_pid(m
);
978 r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
);
982 mount_set_state(m
, MOUNT_REMOUNTING
);
987 log_unit_warning_errno(UNIT(m
), r
, "Failed to run 'remount' task: %m");
988 m
->reload_result
= MOUNT_FAILURE_RESOURCES
;
989 mount_enter_mounted(m
, MOUNT_SUCCESS
);
992 static int mount_start(Unit
*u
) {
998 /* We cannot fulfill this request right now, try again later
1000 if (IN_SET(m
->state
,
1002 MOUNT_UNMOUNTING_SIGTERM
,
1003 MOUNT_UNMOUNTING_SIGKILL
,
1004 MOUNT_MOUNTING_SIGTERM
,
1005 MOUNT_MOUNTING_SIGKILL
))
1008 /* Already on it! */
1009 if (m
->state
== MOUNT_MOUNTING
)
1012 assert(IN_SET(m
->state
, MOUNT_DEAD
, MOUNT_FAILED
));
1014 r
= unit_start_limit_test(u
);
1016 mount_enter_dead(m
, MOUNT_FAILURE_START_LIMIT_HIT
);
1020 r
= unit_acquire_invocation_id(u
);
1024 m
->result
= MOUNT_SUCCESS
;
1025 m
->reload_result
= MOUNT_SUCCESS
;
1026 m
->reset_cpu_usage
= true;
1028 mount_enter_mounting(m
);
1032 static int mount_stop(Unit
*u
) {
1033 Mount
*m
= MOUNT(u
);
1038 if (IN_SET(m
->state
,
1040 MOUNT_UNMOUNTING_SIGKILL
,
1041 MOUNT_UNMOUNTING_SIGTERM
,
1042 MOUNT_MOUNTING_SIGTERM
,
1043 MOUNT_MOUNTING_SIGKILL
))
1046 assert(IN_SET(m
->state
,
1048 MOUNT_MOUNTING_DONE
,
1051 MOUNT_REMOUNTING_SIGTERM
,
1052 MOUNT_REMOUNTING_SIGKILL
));
1054 mount_enter_unmounting(m
);
1058 static int mount_reload(Unit
*u
) {
1059 Mount
*m
= MOUNT(u
);
1063 if (m
->state
== MOUNT_MOUNTING_DONE
)
1066 assert(m
->state
== MOUNT_MOUNTED
);
1068 mount_enter_remounting(m
);
1072 static int mount_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
1073 Mount
*m
= MOUNT(u
);
1079 unit_serialize_item(u
, f
, "state", mount_state_to_string(m
->state
));
1080 unit_serialize_item(u
, f
, "result", mount_result_to_string(m
->result
));
1081 unit_serialize_item(u
, f
, "reload-result", mount_result_to_string(m
->reload_result
));
1083 if (m
->control_pid
> 0)
1084 unit_serialize_item_format(u
, f
, "control-pid", PID_FMT
, m
->control_pid
);
1086 if (m
->control_command_id
>= 0)
1087 unit_serialize_item(u
, f
, "control-command", mount_exec_command_to_string(m
->control_command_id
));
1092 static int mount_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
1093 Mount
*m
= MOUNT(u
);
1100 if (streq(key
, "state")) {
1103 if ((state
= mount_state_from_string(value
)) < 0)
1104 log_unit_debug(u
, "Failed to parse state value: %s", value
);
1106 m
->deserialized_state
= state
;
1107 } else if (streq(key
, "result")) {
1110 f
= mount_result_from_string(value
);
1112 log_unit_debug(u
, "Failed to parse result value: %s", value
);
1113 else if (f
!= MOUNT_SUCCESS
)
1116 } else if (streq(key
, "reload-result")) {
1119 f
= mount_result_from_string(value
);
1121 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
1122 else if (f
!= MOUNT_SUCCESS
)
1123 m
->reload_result
= f
;
1125 } else if (streq(key
, "control-pid")) {
1128 if (parse_pid(value
, &pid
) < 0)
1129 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
1131 m
->control_pid
= pid
;
1132 } else if (streq(key
, "control-command")) {
1133 MountExecCommand id
;
1135 id
= mount_exec_command_from_string(value
);
1137 log_unit_debug(u
, "Failed to parse exec-command value: %s", value
);
1139 m
->control_command_id
= id
;
1140 m
->control_command
= m
->exec_command
+ id
;
1143 log_unit_debug(u
, "Unknown serialization key: %s", key
);
1148 _pure_
static UnitActiveState
mount_active_state(Unit
*u
) {
1151 return state_translation_table
[MOUNT(u
)->state
];
1154 _pure_
static const char *mount_sub_state_to_string(Unit
*u
) {
1157 return mount_state_to_string(MOUNT(u
)->state
);
1160 _pure_
static bool mount_check_gc(Unit
*u
) {
1161 Mount
*m
= MOUNT(u
);
1165 return m
->from_proc_self_mountinfo
;
1168 static void mount_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
1169 Mount
*m
= MOUNT(u
);
1175 if (pid
!= m
->control_pid
)
1180 if (is_clean_exit(code
, status
, EXIT_CLEAN_COMMAND
, NULL
))
1182 else if (code
== CLD_EXITED
)
1183 f
= MOUNT_FAILURE_EXIT_CODE
;
1184 else if (code
== CLD_KILLED
)
1185 f
= MOUNT_FAILURE_SIGNAL
;
1186 else if (code
== CLD_DUMPED
)
1187 f
= MOUNT_FAILURE_CORE_DUMP
;
1189 assert_not_reached("Unknown code");
1191 if (m
->result
== MOUNT_SUCCESS
)
1194 if (m
->control_command
) {
1195 exec_status_exit(&m
->control_command
->exec_status
, &m
->exec_context
, pid
, code
, status
);
1197 m
->control_command
= NULL
;
1198 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
1201 log_unit_full(u
, f
== MOUNT_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
, 0,
1202 "Mount process exited, code=%s status=%i", sigchld_code_to_string(code
), status
);
1204 /* Note that mount(8) returning and the kernel sending us a
1205 * mount table change event might happen out-of-order. If an
1206 * operation succeed we assume the kernel will follow soon too
1207 * and already change into the resulting state. If it fails
1208 * we check if the kernel still knows about the mount. and
1209 * change state accordingly. */
1213 case MOUNT_MOUNTING
:
1214 case MOUNT_MOUNTING_DONE
:
1215 case MOUNT_MOUNTING_SIGKILL
:
1216 case MOUNT_MOUNTING_SIGTERM
:
1218 if (f
== MOUNT_SUCCESS
|| m
->from_proc_self_mountinfo
)
1219 /* If /bin/mount returned success, or if we see the mount point in /proc/self/mountinfo we are
1220 * happy. If we see the first condition first, we should see the the second condition
1221 * immediately after – or /bin/mount lies to us and is broken. */
1222 mount_enter_mounted(m
, f
);
1224 mount_enter_dead(m
, f
);
1227 case MOUNT_REMOUNTING
:
1228 case MOUNT_REMOUNTING_SIGKILL
:
1229 case MOUNT_REMOUNTING_SIGTERM
:
1231 m
->reload_result
= f
;
1232 if (m
->from_proc_self_mountinfo
)
1233 mount_enter_mounted(m
, MOUNT_SUCCESS
);
1235 mount_enter_dead(m
, MOUNT_SUCCESS
);
1239 case MOUNT_UNMOUNTING
:
1240 case MOUNT_UNMOUNTING_SIGKILL
:
1241 case MOUNT_UNMOUNTING_SIGTERM
:
1243 if (f
== MOUNT_SUCCESS
) {
1245 if (m
->from_proc_self_mountinfo
) {
1247 /* Still a mount point? If so, let's
1248 * try again. Most likely there were
1249 * multiple mount points stacked on
1250 * top of each other. Note that due to
1251 * the io event priority logic we can
1252 * be sure the new mountinfo is loaded
1253 * before we process the SIGCHLD for
1254 * the mount command. */
1256 if (m
->n_retry_umount
< RETRY_UMOUNT_MAX
) {
1257 log_unit_debug(u
, "Mount still present, trying again.");
1258 m
->n_retry_umount
++;
1259 mount_enter_unmounting(m
);
1261 log_unit_debug(u
, "Mount still present after %u attempts to unmount, giving up.", m
->n_retry_umount
);
1262 mount_enter_mounted(m
, f
);
1265 mount_enter_dead(m
, f
);
1267 } else if (m
->from_proc_self_mountinfo
)
1268 mount_enter_mounted(m
, f
);
1270 mount_enter_dead(m
, f
);
1274 assert_not_reached("Uh, control process died at wrong time.");
1277 /* Notify clients about changed exit status */
1278 unit_add_to_dbus_queue(u
);
1281 static int mount_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
1282 Mount
*m
= MOUNT(userdata
);
1285 assert(m
->timer_event_source
== source
);
1289 case MOUNT_MOUNTING
:
1290 case MOUNT_MOUNTING_DONE
:
1291 log_unit_warning(UNIT(m
), "Mounting timed out. Stopping.");
1292 mount_enter_signal(m
, MOUNT_MOUNTING_SIGTERM
, MOUNT_FAILURE_TIMEOUT
);
1295 case MOUNT_REMOUNTING
:
1296 log_unit_warning(UNIT(m
), "Remounting timed out. Stopping.");
1297 m
->reload_result
= MOUNT_FAILURE_TIMEOUT
;
1298 mount_enter_mounted(m
, MOUNT_SUCCESS
);
1301 case MOUNT_UNMOUNTING
:
1302 log_unit_warning(UNIT(m
), "Unmounting timed out. Stopping.");
1303 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGTERM
, MOUNT_FAILURE_TIMEOUT
);
1306 case MOUNT_MOUNTING_SIGTERM
:
1307 if (m
->kill_context
.send_sigkill
) {
1308 log_unit_warning(UNIT(m
), "Mounting timed out. Killing.");
1309 mount_enter_signal(m
, MOUNT_MOUNTING_SIGKILL
, MOUNT_FAILURE_TIMEOUT
);
1311 log_unit_warning(UNIT(m
), "Mounting 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_REMOUNTING_SIGTERM
:
1321 if (m
->kill_context
.send_sigkill
) {
1322 log_unit_warning(UNIT(m
), "Remounting timed out. Killing.");
1323 mount_enter_signal(m
, MOUNT_REMOUNTING_SIGKILL
, MOUNT_FAILURE_TIMEOUT
);
1325 log_unit_warning(UNIT(m
), "Remounting timed out. Skipping 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 case MOUNT_UNMOUNTING_SIGTERM
:
1335 if (m
->kill_context
.send_sigkill
) {
1336 log_unit_warning(UNIT(m
), "Unmounting timed out. Killing.");
1337 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGKILL
, MOUNT_FAILURE_TIMEOUT
);
1339 log_unit_warning(UNIT(m
), "Unmounting timed out. Skipping SIGKILL. Ignoring.");
1341 if (m
->from_proc_self_mountinfo
)
1342 mount_enter_mounted(m
, MOUNT_FAILURE_TIMEOUT
);
1344 mount_enter_dead(m
, MOUNT_FAILURE_TIMEOUT
);
1348 case MOUNT_MOUNTING_SIGKILL
:
1349 case MOUNT_REMOUNTING_SIGKILL
:
1350 case MOUNT_UNMOUNTING_SIGKILL
:
1351 log_unit_warning(UNIT(m
),"Mount process still around after SIGKILL. Ignoring.");
1353 if (m
->from_proc_self_mountinfo
)
1354 mount_enter_mounted(m
, MOUNT_FAILURE_TIMEOUT
);
1356 mount_enter_dead(m
, MOUNT_FAILURE_TIMEOUT
);
1360 assert_not_reached("Timeout at wrong time.");
1366 static int mount_setup_unit(
1370 const char *options
,
1374 _cleanup_free_
char *e
= NULL
, *w
= NULL
, *o
= NULL
, *f
= NULL
;
1375 bool load_extras
= false;
1377 bool delete, changed
= false;
1387 /* Ignore API mount points. They should never be referenced in
1388 * dependencies ever. */
1389 if (mount_point_is_api(where
) || mount_point_ignore(where
))
1392 if (streq(fstype
, "autofs"))
1395 /* probably some kind of swap, ignore */
1396 if (!is_path(where
))
1399 r
= unit_name_from_path(where
, ".mount", &e
);
1403 u
= manager_get_unit(m
, e
);
1407 r
= unit_new_for_name(m
, sizeof(Mount
), e
, &u
);
1411 MOUNT(u
)->where
= strdup(where
);
1412 if (!MOUNT(u
)->where
) {
1417 u
->source_path
= strdup("/proc/self/mountinfo");
1418 if (!u
->source_path
) {
1423 if (MANAGER_IS_SYSTEM(m
)) {
1426 target
= mount_needs_network(options
, fstype
) ? SPECIAL_REMOTE_FS_TARGET
: SPECIAL_LOCAL_FS_TARGET
;
1427 r
= unit_add_dependency_by_name(u
, UNIT_BEFORE
, target
, NULL
, true);
1431 if (should_umount(MOUNT(u
))) {
1432 r
= unit_add_dependency_by_name(u
, UNIT_CONFLICTS
, SPECIAL_UMOUNT_TARGET
, NULL
, true);
1438 unit_add_to_load_queue(u
);
1443 if (!MOUNT(u
)->where
) {
1444 MOUNT(u
)->where
= strdup(where
);
1445 if (!MOUNT(u
)->where
) {
1451 if (MANAGER_IS_SYSTEM(m
) &&
1452 mount_needs_network(options
, fstype
)) {
1453 /* _netdev option may have shown up late, or on a
1454 * remount. Add remote-fs dependencies, even though
1455 * local-fs ones may already be there. */
1456 unit_add_dependency_by_name(u
, UNIT_BEFORE
, SPECIAL_REMOTE_FS_TARGET
, NULL
, true);
1460 if (u
->load_state
== UNIT_NOT_FOUND
) {
1461 u
->load_state
= UNIT_LOADED
;
1464 /* Load in the extras later on, after we
1465 * finished initialization of the unit */
1472 o
= strdup(options
);
1474 if (!w
|| !o
|| !f
) {
1479 p
= &MOUNT(u
)->parameters_proc_self_mountinfo
;
1481 changed
= changed
||
1482 !streq_ptr(p
->options
, options
) ||
1483 !streq_ptr(p
->what
, what
) ||
1484 !streq_ptr(p
->fstype
, fstype
);
1487 MOUNT(u
)->is_mounted
= true;
1488 MOUNT(u
)->just_mounted
= !MOUNT(u
)->from_proc_self_mountinfo
;
1489 MOUNT(u
)->just_changed
= changed
;
1492 MOUNT(u
)->from_proc_self_mountinfo
= true;
1494 free_and_replace(p
->what
, w
);
1495 free_and_replace(p
->options
, o
);
1496 free_and_replace(p
->fstype
, f
);
1499 r
= mount_add_extras(MOUNT(u
));
1505 unit_add_to_dbus_queue(u
);
1510 log_warning_errno(r
, "Failed to set up mount unit: %m");
1518 static int mount_load_proc_self_mountinfo(Manager
*m
, bool set_flags
) {
1519 _cleanup_(mnt_free_tablep
) struct libmnt_table
*t
= NULL
;
1520 _cleanup_(mnt_free_iterp
) struct libmnt_iter
*i
= NULL
;
1525 t
= mnt_new_table();
1529 i
= mnt_new_iter(MNT_ITER_FORWARD
);
1533 r
= mnt_table_parse_mtab(t
, NULL
);
1535 return log_error_errno(r
, "Failed to parse /proc/self/mountinfo: %m");
1539 const char *device
, *path
, *options
, *fstype
;
1540 _cleanup_free_
char *d
= NULL
, *p
= NULL
;
1541 struct libmnt_fs
*fs
;
1544 k
= mnt_table_next_fs(t
, i
, &fs
);
1548 return log_error_errno(k
, "Failed to get next entry from /proc/self/mountinfo: %m");
1550 device
= mnt_fs_get_source(fs
);
1551 path
= mnt_fs_get_target(fs
);
1552 options
= mnt_fs_get_options(fs
);
1553 fstype
= mnt_fs_get_fstype(fs
);
1555 if (!device
|| !path
)
1558 if (cunescape(device
, UNESCAPE_RELAX
, &d
) < 0)
1561 if (cunescape(path
, UNESCAPE_RELAX
, &p
) < 0)
1564 (void) device_found_node(m
, d
, true, DEVICE_FOUND_MOUNT
, set_flags
);
1566 k
= mount_setup_unit(m
, d
, p
, options
, fstype
, set_flags
);
1567 if (r
== 0 && k
< 0)
1574 static void mount_shutdown(Manager
*m
) {
1578 m
->mount_event_source
= sd_event_source_unref(m
->mount_event_source
);
1580 mnt_unref_monitor(m
->mount_monitor
);
1581 m
->mount_monitor
= NULL
;
1584 static int mount_get_timeout(Unit
*u
, usec_t
*timeout
) {
1585 Mount
*m
= MOUNT(u
);
1589 if (!m
->timer_event_source
)
1592 r
= sd_event_source_get_time(m
->timer_event_source
, &t
);
1595 if (t
== USEC_INFINITY
)
1602 static int synthesize_root_mount(Manager
*m
) {
1608 /* Whatever happens, we know for sure that the root directory is around, and cannot go away. Let's
1609 * unconditionally synthesize it here and mark it as perpetual. */
1611 u
= manager_get_unit(m
, SPECIAL_ROOT_MOUNT
);
1613 r
= unit_new_for_name(m
, sizeof(Mount
), SPECIAL_ROOT_MOUNT
, &u
);
1615 return log_error_errno(r
, "Failed to allocate the special " SPECIAL_ROOT_MOUNT
" unit: %m");
1618 u
->perpetual
= true;
1619 MOUNT(u
)->deserialized_state
= MOUNT_MOUNTED
;
1621 unit_add_to_load_queue(u
);
1622 unit_add_to_dbus_queue(u
);
1627 static bool mount_is_mounted(Mount
*m
) {
1630 return UNIT(m
)->perpetual
|| m
->is_mounted
;
1633 static void mount_enumerate(Manager
*m
) {
1638 r
= synthesize_root_mount(m
);
1644 if (!m
->mount_monitor
) {
1647 m
->mount_monitor
= mnt_new_monitor();
1648 if (!m
->mount_monitor
) {
1653 r
= mnt_monitor_enable_kernel(m
->mount_monitor
, 1);
1655 log_error_errno(r
, "Failed to enable watching of kernel mount events: %m");
1659 r
= mnt_monitor_enable_userspace(m
->mount_monitor
, 1, NULL
);
1661 log_error_errno(r
, "Failed to enable watching of userspace mount events: %m");
1665 /* mnt_unref_monitor() will close the fd */
1666 fd
= r
= mnt_monitor_get_fd(m
->mount_monitor
);
1668 log_error_errno(r
, "Failed to acquire watch file descriptor: %m");
1672 r
= sd_event_add_io(m
->event
, &m
->mount_event_source
, fd
, EPOLLIN
, mount_dispatch_io
, m
);
1674 log_error_errno(r
, "Failed to watch mount file descriptor: %m");
1678 r
= sd_event_source_set_priority(m
->mount_event_source
, -10);
1680 log_error_errno(r
, "Failed to adjust mount watch priority: %m");
1684 (void) sd_event_source_set_description(m
->mount_event_source
, "mount-monitor-dispatch");
1687 r
= mount_load_proc_self_mountinfo(m
, false);
1697 static int mount_dispatch_io(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
1698 _cleanup_set_free_ Set
*around
= NULL
, *gone
= NULL
;
1699 Manager
*m
= userdata
;
1706 assert(revents
& EPOLLIN
);
1708 if (fd
== mnt_monitor_get_fd(m
->mount_monitor
)) {
1709 bool rescan
= false;
1711 /* Drain all events and verify that the event is valid.
1713 * Note that libmount also monitors /run/mount mkdir if the
1714 * directory does not exist yet. The mkdir may generate event
1715 * which is irrelevant for us.
1717 * error: r < 0; valid: r == 0, false positive: rc == 1 */
1719 r
= mnt_monitor_next_change(m
->mount_monitor
, NULL
, NULL
);
1723 return log_error_errno(r
, "Failed to drain libmount events");
1726 log_debug("libmount event [rescan: %s]", yes_no(rescan
));
1731 r
= mount_load_proc_self_mountinfo(m
, true);
1733 /* Reset flags, just in case, for later calls */
1734 LIST_FOREACH(units_by_type
, u
, m
->units_by_type
[UNIT_MOUNT
]) {
1735 Mount
*mount
= MOUNT(u
);
1737 mount
->is_mounted
= mount
->just_mounted
= mount
->just_changed
= false;
1743 manager_dispatch_load_queue(m
);
1745 LIST_FOREACH(units_by_type
, u
, m
->units_by_type
[UNIT_MOUNT
]) {
1746 Mount
*mount
= MOUNT(u
);
1748 if (!mount_is_mounted(mount
)) {
1750 /* A mount point is not around right now. It
1751 * might be gone, or might never have
1754 if (mount
->from_proc_self_mountinfo
&&
1755 mount
->parameters_proc_self_mountinfo
.what
) {
1757 /* Remember that this device might just have disappeared */
1758 if (set_ensure_allocated(&gone
, &string_hash_ops
) < 0 ||
1759 set_put(gone
, mount
->parameters_proc_self_mountinfo
.what
) < 0)
1760 log_oom(); /* we don't care too much about OOM here... */
1763 mount
->from_proc_self_mountinfo
= false;
1765 switch (mount
->state
) {
1768 /* This has just been unmounted by
1769 * somebody else, follow the state
1771 mount
->result
= MOUNT_SUCCESS
; /* make sure we forget any earlier umount failures */
1772 mount_enter_dead(mount
, MOUNT_SUCCESS
);
1779 } else if (mount
->just_mounted
|| mount
->just_changed
) {
1781 /* A mount point was added or changed */
1783 switch (mount
->state
) {
1788 /* This has just been mounted by somebody else, follow the state change, but let's
1789 * generate a new invocation ID for this implicitly and automatically. */
1790 (void) unit_acquire_invocation_id(UNIT(mount
));
1791 mount_enter_mounted(mount
, MOUNT_SUCCESS
);
1794 case MOUNT_MOUNTING
:
1795 mount_set_state(mount
, MOUNT_MOUNTING_DONE
);
1799 /* Nothing really changed, but let's
1800 * issue an notification call
1801 * nonetheless, in case somebody is
1802 * waiting for this. (e.g. file system
1803 * ro/rw remounts.) */
1804 mount_set_state(mount
, mount
->state
);
1809 if (mount_is_mounted(mount
) &&
1810 mount
->from_proc_self_mountinfo
&&
1811 mount
->parameters_proc_self_mountinfo
.what
) {
1813 if (set_ensure_allocated(&around
, &string_hash_ops
) < 0 ||
1814 set_put(around
, mount
->parameters_proc_self_mountinfo
.what
) < 0)
1818 /* Reset the flags for later calls */
1819 mount
->is_mounted
= mount
->just_mounted
= mount
->just_changed
= false;
1822 SET_FOREACH(what
, gone
, i
) {
1823 if (set_contains(around
, what
))
1826 /* Let the device units know that the device is no longer mounted */
1827 (void) device_found_node(m
, what
, false, DEVICE_FOUND_MOUNT
, true);
1833 static void mount_reset_failed(Unit
*u
) {
1834 Mount
*m
= MOUNT(u
);
1838 if (m
->state
== MOUNT_FAILED
)
1839 mount_set_state(m
, MOUNT_DEAD
);
1841 m
->result
= MOUNT_SUCCESS
;
1842 m
->reload_result
= MOUNT_SUCCESS
;
1845 static int mount_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
1846 return unit_kill_common(u
, who
, signo
, -1, MOUNT(u
)->control_pid
, error
);
1849 static int mount_control_pid(Unit
*u
) {
1850 Mount
*m
= MOUNT(u
);
1854 return m
->control_pid
;
1857 static const char* const mount_exec_command_table
[_MOUNT_EXEC_COMMAND_MAX
] = {
1858 [MOUNT_EXEC_MOUNT
] = "ExecMount",
1859 [MOUNT_EXEC_UNMOUNT
] = "ExecUnmount",
1860 [MOUNT_EXEC_REMOUNT
] = "ExecRemount",
1863 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command
, MountExecCommand
);
1865 static const char* const mount_result_table
[_MOUNT_RESULT_MAX
] = {
1866 [MOUNT_SUCCESS
] = "success",
1867 [MOUNT_FAILURE_RESOURCES
] = "resources",
1868 [MOUNT_FAILURE_TIMEOUT
] = "timeout",
1869 [MOUNT_FAILURE_EXIT_CODE
] = "exit-code",
1870 [MOUNT_FAILURE_SIGNAL
] = "signal",
1871 [MOUNT_FAILURE_CORE_DUMP
] = "core-dump",
1872 [MOUNT_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
1875 DEFINE_STRING_TABLE_LOOKUP(mount_result
, MountResult
);
1877 const UnitVTable mount_vtable
= {
1878 .object_size
= sizeof(Mount
),
1879 .exec_context_offset
= offsetof(Mount
, exec_context
),
1880 .cgroup_context_offset
= offsetof(Mount
, cgroup_context
),
1881 .kill_context_offset
= offsetof(Mount
, kill_context
),
1882 .exec_runtime_offset
= offsetof(Mount
, exec_runtime
),
1883 .dynamic_creds_offset
= offsetof(Mount
, dynamic_creds
),
1889 .private_section
= "Mount",
1895 .coldplug
= mount_coldplug
,
1899 .start
= mount_start
,
1901 .reload
= mount_reload
,
1905 .serialize
= mount_serialize
,
1906 .deserialize_item
= mount_deserialize_item
,
1908 .active_state
= mount_active_state
,
1909 .sub_state_to_string
= mount_sub_state_to_string
,
1911 .check_gc
= mount_check_gc
,
1913 .sigchld_event
= mount_sigchld_event
,
1915 .reset_failed
= mount_reset_failed
,
1917 .control_pid
= mount_control_pid
,
1919 .bus_vtable
= bus_mount_vtable
,
1920 .bus_set_property
= bus_mount_set_property
,
1921 .bus_commit_properties
= bus_mount_commit_properties
,
1923 .get_timeout
= mount_get_timeout
,
1925 .can_transient
= true,
1927 .enumerate
= mount_enumerate
,
1928 .shutdown
= mount_shutdown
,
1930 .status_message_formats
= {
1931 .starting_stopping
= {
1932 [0] = "Mounting %s...",
1933 [1] = "Unmounting %s...",
1935 .finished_start_job
= {
1936 [JOB_DONE
] = "Mounted %s.",
1937 [JOB_FAILED
] = "Failed to mount %s.",
1938 [JOB_TIMEOUT
] = "Timed out mounting %s.",
1940 .finished_stop_job
= {
1941 [JOB_DONE
] = "Unmounted %s.",
1942 [JOB_FAILED
] = "Failed unmounting %s.",
1943 [JOB_TIMEOUT
] = "Timed out unmounting %s.",