1 /* SPDX-License-Identifier: LGPL-2.1+ */
10 #include "sd-messages.h"
12 #include "alloc-util.h"
13 #include "dbus-mount.h"
16 #include "exit-status.h"
17 #include "format-util.h"
18 #include "fstab-util.h"
22 #include "mount-setup.h"
23 #include "mount-util.h"
25 #include "parse-util.h"
26 #include "path-util.h"
27 #include "process-util.h"
28 #include "serialize.h"
30 #include "string-table.h"
31 #include "string-util.h"
33 #include "unit-name.h"
36 #define RETRY_UMOUNT_MAX 32
38 DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_table
*, mnt_free_table
);
39 DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_iter
*, mnt_free_iter
);
41 static const UnitActiveState state_translation_table
[_MOUNT_STATE_MAX
] = {
42 [MOUNT_DEAD
] = UNIT_INACTIVE
,
43 [MOUNT_MOUNTING
] = UNIT_ACTIVATING
,
44 [MOUNT_MOUNTING_DONE
] = UNIT_ACTIVATING
,
45 [MOUNT_MOUNTED
] = UNIT_ACTIVE
,
46 [MOUNT_REMOUNTING
] = UNIT_RELOADING
,
47 [MOUNT_UNMOUNTING
] = UNIT_DEACTIVATING
,
48 [MOUNT_REMOUNTING_SIGTERM
] = UNIT_RELOADING
,
49 [MOUNT_REMOUNTING_SIGKILL
] = UNIT_RELOADING
,
50 [MOUNT_UNMOUNTING_SIGTERM
] = UNIT_DEACTIVATING
,
51 [MOUNT_UNMOUNTING_SIGKILL
] = UNIT_DEACTIVATING
,
52 [MOUNT_FAILED
] = UNIT_FAILED
55 static int mount_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
56 static int mount_dispatch_io(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
);
58 static bool MOUNT_STATE_WITH_PROCESS(MountState state
) {
63 MOUNT_REMOUNTING_SIGTERM
,
64 MOUNT_REMOUNTING_SIGKILL
,
66 MOUNT_UNMOUNTING_SIGTERM
,
67 MOUNT_UNMOUNTING_SIGKILL
);
70 static bool mount_needs_network(const char *options
, const char *fstype
) {
71 if (fstab_test_option(options
, "_netdev\0"))
74 if (fstype
&& fstype_is_network(fstype
))
80 static bool mount_is_network(const MountParameters
*p
) {
83 return mount_needs_network(p
->options
, p
->fstype
);
86 static bool mount_is_loop(const MountParameters
*p
) {
89 if (fstab_test_option(p
->options
, "loop\0"))
95 static bool mount_is_bind(const MountParameters
*p
) {
98 if (fstab_test_option(p
->options
, "bind\0" "rbind\0"))
101 if (p
->fstype
&& STR_IN_SET(p
->fstype
, "bind", "rbind"))
107 static bool mount_is_auto(const MountParameters
*p
) {
110 return !fstab_test_option(p
->options
, "noauto\0");
113 static bool mount_is_automount(const MountParameters
*p
) {
116 return fstab_test_option(p
->options
,
117 "comment=systemd.automount\0"
118 "x-systemd.automount\0");
121 static bool mount_is_bound_to_device(const Mount
*m
) {
122 const MountParameters
*p
;
124 if (m
->from_fragment
)
127 p
= &m
->parameters_proc_self_mountinfo
;
128 return fstab_test_option(p
->options
, "x-systemd.device-bound\0");
131 static bool needs_quota(const MountParameters
*p
) {
134 /* Quotas are not enabled on network filesystems,
135 * but we want them, for example, on storage connected via iscsi */
136 if (p
->fstype
&& fstype_is_network(p
->fstype
))
139 if (mount_is_bind(p
))
142 return fstab_test_option(p
->options
,
143 "usrquota\0" "grpquota\0" "quota\0" "usrjquota\0" "grpjquota\0");
146 static void mount_init(Unit
*u
) {
150 assert(u
->load_state
== UNIT_STUB
);
152 m
->timeout_usec
= u
->manager
->default_timeout_start_usec
;
154 m
->exec_context
.std_output
= u
->manager
->default_std_output
;
155 m
->exec_context
.std_error
= u
->manager
->default_std_error
;
157 m
->directory_mode
= 0755;
159 /* We need to make sure that /usr/bin/mount is always called
160 * in the same process group as us, so that the autofs kernel
161 * side doesn't send us another mount request while we are
162 * already trying to comply its last one. */
163 m
->exec_context
.same_pgrp
= true;
165 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
167 u
->ignore_on_isolate
= true;
170 static int mount_arm_timer(Mount
*m
, usec_t usec
) {
175 if (m
->timer_event_source
) {
176 r
= sd_event_source_set_time(m
->timer_event_source
, usec
);
180 return sd_event_source_set_enabled(m
->timer_event_source
, SD_EVENT_ONESHOT
);
183 if (usec
== USEC_INFINITY
)
186 r
= sd_event_add_time(
187 UNIT(m
)->manager
->event
,
188 &m
->timer_event_source
,
191 mount_dispatch_timer
, m
);
195 (void) sd_event_source_set_description(m
->timer_event_source
, "mount-timer");
200 static void mount_unwatch_control_pid(Mount
*m
) {
203 if (m
->control_pid
<= 0)
206 unit_unwatch_pid(UNIT(m
), m
->control_pid
);
210 static void mount_parameters_done(MountParameters
*p
) {
217 p
->what
= p
->options
= p
->fstype
= NULL
;
220 static void mount_done(Unit
*u
) {
225 m
->where
= mfree(m
->where
);
227 mount_parameters_done(&m
->parameters_proc_self_mountinfo
);
228 mount_parameters_done(&m
->parameters_fragment
);
230 m
->exec_runtime
= exec_runtime_unref(m
->exec_runtime
, false);
231 exec_command_done_array(m
->exec_command
, _MOUNT_EXEC_COMMAND_MAX
);
232 m
->control_command
= NULL
;
234 dynamic_creds_unref(&m
->dynamic_creds
);
236 mount_unwatch_control_pid(m
);
238 m
->timer_event_source
= sd_event_source_unref(m
->timer_event_source
);
241 _pure_
static MountParameters
* get_mount_parameters_fragment(Mount
*m
) {
244 if (m
->from_fragment
)
245 return &m
->parameters_fragment
;
250 _pure_
static MountParameters
* get_mount_parameters(Mount
*m
) {
253 if (m
->from_proc_self_mountinfo
)
254 return &m
->parameters_proc_self_mountinfo
;
256 return get_mount_parameters_fragment(m
);
259 static int mount_add_mount_dependencies(Mount
*m
) {
268 if (!path_equal(m
->where
, "/")) {
269 _cleanup_free_
char *parent
= NULL
;
271 /* Adds in links to other mount points that might lie further up in the hierarchy */
273 parent
= dirname_malloc(m
->where
);
277 r
= unit_require_mounts_for(UNIT(m
), parent
, UNIT_DEPENDENCY_IMPLICIT
);
282 /* Adds in dependencies to other mount points that might be needed for the source path (if this is a bind mount
283 * or a loop mount) to be available. */
284 pm
= get_mount_parameters_fragment(m
);
285 if (pm
&& pm
->what
&&
286 path_is_absolute(pm
->what
) &&
287 (mount_is_bind(pm
) || mount_is_loop(pm
) || !mount_is_network(pm
))) {
289 r
= unit_require_mounts_for(UNIT(m
), pm
->what
, UNIT_DEPENDENCY_FILE
);
294 /* Adds in dependencies to other units that use this path or paths further down in the hierarchy */
295 s
= manager_get_units_requiring_mounts_for(UNIT(m
)->manager
, m
->where
);
296 SET_FOREACH(other
, s
, i
) {
298 if (other
->load_state
!= UNIT_LOADED
)
301 if (other
== UNIT(m
))
304 r
= unit_add_dependency(other
, UNIT_AFTER
, UNIT(m
), true, UNIT_DEPENDENCY_PATH
);
308 if (UNIT(m
)->fragment_path
) {
309 /* If we have fragment configuration, then make this dependency required */
310 r
= unit_add_dependency(other
, UNIT_REQUIRES
, UNIT(m
), true, UNIT_DEPENDENCY_PATH
);
319 static int mount_add_device_dependencies(Mount
*m
) {
320 bool device_wants_mount
= false;
321 UnitDependencyMask mask
;
328 p
= get_mount_parameters(m
);
335 if (mount_is_bind(p
))
338 if (!is_device_path(p
->what
))
341 /* /dev/root is a really weird thing, it's not a real device,
342 * but just a path the kernel exports for the root file system
343 * specified on the kernel command line. Ignore it here. */
344 if (path_equal(p
->what
, "/dev/root"))
347 if (path_equal(m
->where
, "/"))
350 if (mount_is_auto(p
) && !mount_is_automount(p
) && MANAGER_IS_SYSTEM(UNIT(m
)->manager
))
351 device_wants_mount
= true;
353 /* Mount units from /proc/self/mountinfo are not bound to devices
354 * by default since they're subject to races when devices are
355 * unplugged. But the user can still force this dep with an
356 * appropriate option (or udev property) so the mount units are
357 * automatically stopped when the device disappears suddenly. */
358 dep
= mount_is_bound_to_device(m
) ? UNIT_BINDS_TO
: UNIT_REQUIRES
;
360 mask
= m
->from_fragment
? UNIT_DEPENDENCY_FILE
: UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT
;
362 r
= unit_add_node_dependency(UNIT(m
), p
->what
, device_wants_mount
, dep
, mask
);
369 static int mount_add_quota_dependencies(Mount
*m
) {
370 UnitDependencyMask mask
;
376 if (!MANAGER_IS_SYSTEM(UNIT(m
)->manager
))
379 p
= get_mount_parameters_fragment(m
);
386 mask
= m
->from_fragment
? UNIT_DEPENDENCY_FILE
: UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT
;
388 r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_BEFORE
, UNIT_WANTS
, SPECIAL_QUOTACHECK_SERVICE
, true, mask
);
392 r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_BEFORE
, UNIT_WANTS
, SPECIAL_QUOTAON_SERVICE
, true, mask
);
399 static bool mount_is_extrinsic(Mount
*m
) {
403 /* Returns true for all units that are "magic" and should be excluded from the usual start-up and shutdown
404 * dependencies. We call them "extrinsic" here, as they are generally mounted outside of the systemd dependency
405 * logic. We shouldn't attempt to manage them ourselves but it's fine if the user operates on them with us. */
407 if (!MANAGER_IS_SYSTEM(UNIT(m
)->manager
)) /* We only automatically manage mounts if we are in system mode */
410 if (PATH_IN_SET(m
->where
, /* Don't bother with the OS data itself */
415 if (PATH_STARTSWITH_SET(m
->where
,
416 "/run/initramfs", /* This should stay around from before we boot until after we shutdown */
417 "/proc", /* All of this is API VFS */
418 "/sys", /* … dito … */
419 "/dev")) /* … dito … */
422 /* If this is an initrd mount, and we are not in the initrd, then leave this around forever, too. */
423 p
= get_mount_parameters(m
);
424 if (p
&& fstab_test_option(p
->options
, "x-initrd.mount\0") && !in_initrd())
430 static int mount_add_default_dependencies(Mount
*m
) {
431 UnitDependencyMask mask
;
438 if (!UNIT(m
)->default_dependencies
)
441 /* We do not add any default dependencies to /, /usr or /run/initramfs/, since they are guaranteed to stay
442 * mounted the whole time, since our system is on it. Also, don't bother with anything mounted below virtual
443 * file systems, it's also going to be virtual, and hence not worth the effort. */
444 if (mount_is_extrinsic(m
))
447 p
= get_mount_parameters(m
);
451 mask
= m
->from_fragment
? UNIT_DEPENDENCY_FILE
: UNIT_DEPENDENCY_MOUNTINFO_DEFAULT
;
453 if (mount_is_network(p
)) {
454 /* We order ourselves after network.target. This is
455 * primarily useful at shutdown: services that take
456 * down the network should order themselves before
457 * network.target, so that they are shut down only
458 * after this mount unit is stopped. */
460 r
= unit_add_dependency_by_name(UNIT(m
), UNIT_AFTER
, SPECIAL_NETWORK_TARGET
, true, mask
);
464 /* We pull in network-online.target, and order
465 * ourselves after it. This is useful at start-up to
466 * actively pull in tools that want to be started
467 * before we start mounting network file systems, and
468 * whose purpose it is to delay this until the network
471 r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_WANTS
, UNIT_AFTER
, SPECIAL_NETWORK_ONLINE_TARGET
, true, mask
);
475 after
= SPECIAL_REMOTE_FS_PRE_TARGET
;
477 after
= SPECIAL_LOCAL_FS_PRE_TARGET
;
479 r
= unit_add_dependency_by_name(UNIT(m
), UNIT_AFTER
, after
, true, mask
);
483 r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_UMOUNT_TARGET
, true, mask
);
487 /* If this is a tmpfs mount then we have to unmount it before we try to deactivate swaps */
488 if (streq_ptr(p
->fstype
, "tmpfs")) {
489 r
= unit_add_dependency_by_name(UNIT(m
), UNIT_AFTER
, SPECIAL_SWAP_TARGET
, true, mask
);
497 static int mount_verify(Mount
*m
) {
498 _cleanup_free_
char *e
= NULL
;
504 if (UNIT(m
)->load_state
!= UNIT_LOADED
)
507 if (!m
->from_fragment
&& !m
->from_proc_self_mountinfo
&& !UNIT(m
)->perpetual
)
510 r
= unit_name_from_path(m
->where
, ".mount", &e
);
512 return log_unit_error_errno(UNIT(m
), r
, "Failed to generate unit name from mount path: %m");
514 if (!unit_has_name(UNIT(m
), e
)) {
515 log_unit_error(UNIT(m
), "Where= setting doesn't match unit name. Refusing.");
519 if (mount_point_is_api(m
->where
) || mount_point_ignore(m
->where
)) {
520 log_unit_error(UNIT(m
), "Cannot create mount unit for API file system %s. Refusing.", m
->where
);
524 p
= get_mount_parameters_fragment(m
);
526 log_unit_error(UNIT(m
), "What= setting is missing. Refusing.");
530 if (m
->exec_context
.pam_name
&& m
->kill_context
.kill_mode
!= KILL_CONTROL_GROUP
) {
531 log_unit_error(UNIT(m
), "Unit has PAM enabled. Kill mode must be set to control-group'. Refusing.");
538 static int mount_add_extras(Mount
*m
) {
544 if (u
->fragment_path
)
545 m
->from_fragment
= true;
548 r
= unit_name_to_path(u
->id
, &m
->where
);
553 path_simplify(m
->where
, false);
555 if (!u
->description
) {
556 r
= unit_set_description(u
, m
->where
);
561 r
= mount_add_device_dependencies(m
);
565 r
= mount_add_mount_dependencies(m
);
569 r
= mount_add_quota_dependencies(m
);
573 r
= unit_patch_contexts(u
);
577 r
= unit_add_exec_dependencies(u
, &m
->exec_context
);
581 r
= unit_set_default_slice(u
);
585 r
= mount_add_default_dependencies(m
);
592 static int mount_load_root_mount(Unit
*u
) {
595 if (!unit_has_name(u
, SPECIAL_ROOT_MOUNT
))
599 u
->default_dependencies
= false;
601 /* The stdio/kmsg bridge socket is on /, in order to avoid a dep loop, don't use kmsg logging for -.mount */
602 MOUNT(u
)->exec_context
.std_output
= EXEC_OUTPUT_NULL
;
603 MOUNT(u
)->exec_context
.std_input
= EXEC_INPUT_NULL
;
606 u
->description
= strdup("Root Mount");
611 static int mount_load(Unit
*u
) {
616 assert(u
->load_state
== UNIT_STUB
);
618 r
= mount_load_root_mount(u
);
622 if (m
->from_proc_self_mountinfo
|| u
->perpetual
)
623 r
= unit_load_fragment_and_dropin_optional(u
);
625 r
= unit_load_fragment_and_dropin(u
);
629 /* This is a new unit? Then let's add in some extras */
630 if (u
->load_state
== UNIT_LOADED
) {
631 r
= mount_add_extras(m
);
636 return mount_verify(m
);
639 static void mount_set_state(Mount
*m
, MountState state
) {
640 MountState old_state
;
643 old_state
= m
->state
;
646 if (!MOUNT_STATE_WITH_PROCESS(state
)) {
647 m
->timer_event_source
= sd_event_source_unref(m
->timer_event_source
);
648 mount_unwatch_control_pid(m
);
649 m
->control_command
= NULL
;
650 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
653 if (state
!= old_state
)
654 log_unit_debug(UNIT(m
), "Changed %s -> %s", mount_state_to_string(old_state
), mount_state_to_string(state
));
656 unit_notify(UNIT(m
), state_translation_table
[old_state
], state_translation_table
[state
],
657 m
->reload_result
== MOUNT_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
);
660 static int mount_coldplug(Unit
*u
) {
662 MountState new_state
= MOUNT_DEAD
;
666 assert(m
->state
== MOUNT_DEAD
);
668 if (m
->deserialized_state
!= m
->state
)
669 new_state
= m
->deserialized_state
;
670 else if (m
->from_proc_self_mountinfo
)
671 new_state
= MOUNT_MOUNTED
;
673 if (new_state
== m
->state
)
676 if (m
->control_pid
> 0 &&
677 pid_is_unwaited(m
->control_pid
) &&
678 MOUNT_STATE_WITH_PROCESS(new_state
)) {
680 r
= unit_watch_pid(UNIT(m
), m
->control_pid
);
684 r
= mount_arm_timer(m
, usec_add(u
->state_change_timestamp
.monotonic
, m
->timeout_usec
));
689 if (!IN_SET(new_state
, MOUNT_DEAD
, MOUNT_FAILED
)) {
690 (void) unit_setup_dynamic_creds(u
);
691 (void) unit_setup_exec_runtime(u
);
694 mount_set_state(m
, new_state
);
698 static void mount_dump(Unit
*u
, FILE *f
, const char *prefix
) {
699 char buf
[FORMAT_TIMESPAN_MAX
];
706 p
= get_mount_parameters(m
);
709 "%sMount State: %s\n"
713 "%sFile System Type: %s\n"
715 "%sFrom /proc/self/mountinfo: %s\n"
716 "%sFrom fragment: %s\n"
718 "%sDirectoryMode: %04o\n"
719 "%sSloppyOptions: %s\n"
720 "%sLazyUnmount: %s\n"
721 "%sForceUnmount: %s\n"
723 prefix
, mount_state_to_string(m
->state
),
724 prefix
, mount_result_to_string(m
->result
),
726 prefix
, p
? strna(p
->what
) : "n/a",
727 prefix
, p
? strna(p
->fstype
) : "n/a",
728 prefix
, p
? strna(p
->options
) : "n/a",
729 prefix
, yes_no(m
->from_proc_self_mountinfo
),
730 prefix
, yes_no(m
->from_fragment
),
731 prefix
, yes_no(mount_is_extrinsic(m
)),
732 prefix
, m
->directory_mode
,
733 prefix
, yes_no(m
->sloppy_options
),
734 prefix
, yes_no(m
->lazy_unmount
),
735 prefix
, yes_no(m
->force_unmount
),
736 prefix
, format_timespan(buf
, sizeof(buf
), m
->timeout_usec
, USEC_PER_SEC
));
738 if (m
->control_pid
> 0)
740 "%sControl PID: "PID_FMT
"\n",
741 prefix
, m
->control_pid
);
743 exec_context_dump(&m
->exec_context
, f
, prefix
);
744 kill_context_dump(&m
->kill_context
, f
, prefix
);
745 cgroup_context_dump(&m
->cgroup_context
, f
, prefix
);
748 static int mount_spawn(Mount
*m
, ExecCommand
*c
, pid_t
*_pid
) {
750 ExecParameters exec_params
= {
751 .flags
= EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
,
764 r
= unit_prepare_exec(UNIT(m
));
768 r
= mount_arm_timer(m
, usec_add(now(CLOCK_MONOTONIC
), m
->timeout_usec
));
772 unit_set_exec_params(UNIT(m
), &exec_params
);
774 r
= exec_spawn(UNIT(m
),
784 r
= unit_watch_pid(UNIT(m
), pid
);
786 /* FIXME: we need to do something here */
794 static void mount_enter_dead(Mount
*m
, MountResult f
) {
797 if (m
->result
== MOUNT_SUCCESS
)
800 if (m
->result
!= MOUNT_SUCCESS
)
801 log_unit_warning(UNIT(m
), "Failed with result '%s'.", mount_result_to_string(m
->result
));
803 mount_set_state(m
, m
->result
!= MOUNT_SUCCESS
? MOUNT_FAILED
: MOUNT_DEAD
);
805 m
->exec_runtime
= exec_runtime_unref(m
->exec_runtime
, true);
807 exec_context_destroy_runtime_directory(&m
->exec_context
, UNIT(m
)->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
809 unit_unref_uid_gid(UNIT(m
), true);
811 dynamic_creds_destroy(&m
->dynamic_creds
);
814 static void mount_enter_mounted(Mount
*m
, MountResult f
) {
817 if (m
->result
== MOUNT_SUCCESS
)
820 mount_set_state(m
, MOUNT_MOUNTED
);
823 static void mount_enter_dead_or_mounted(Mount
*m
, MountResult f
) {
826 /* Enter DEAD or MOUNTED state, depending on what the kernel currently says about the mount point. We use this
827 * whenever we executed an operation, so that our internal state reflects what the kernel says again, after all
828 * ultimately we just mirror the kernel's internal state on this. */
830 if (m
->from_proc_self_mountinfo
)
831 mount_enter_mounted(m
, f
);
833 mount_enter_dead(m
, f
);
836 static int state_to_kill_operation(MountState state
) {
839 case MOUNT_REMOUNTING_SIGTERM
:
840 case MOUNT_UNMOUNTING_SIGTERM
:
841 return KILL_TERMINATE
;
843 case MOUNT_REMOUNTING_SIGKILL
:
844 case MOUNT_UNMOUNTING_SIGKILL
:
848 return _KILL_OPERATION_INVALID
;
852 static void mount_enter_signal(Mount
*m
, MountState state
, MountResult f
) {
857 if (m
->result
== MOUNT_SUCCESS
)
860 r
= unit_kill_context(
863 state_to_kill_operation(state
),
871 r
= mount_arm_timer(m
, usec_add(now(CLOCK_MONOTONIC
), m
->timeout_usec
));
875 mount_set_state(m
, state
);
876 } else if (state
== MOUNT_REMOUNTING_SIGTERM
&& m
->kill_context
.send_sigkill
)
877 mount_enter_signal(m
, MOUNT_REMOUNTING_SIGKILL
, MOUNT_SUCCESS
);
878 else if (IN_SET(state
, MOUNT_REMOUNTING_SIGTERM
, MOUNT_REMOUNTING_SIGKILL
))
879 mount_enter_mounted(m
, MOUNT_SUCCESS
);
880 else if (state
== MOUNT_UNMOUNTING_SIGTERM
&& m
->kill_context
.send_sigkill
)
881 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGKILL
, MOUNT_SUCCESS
);
883 mount_enter_dead_or_mounted(m
, MOUNT_SUCCESS
);
888 log_unit_warning_errno(UNIT(m
), r
, "Failed to kill processes: %m");
889 mount_enter_dead_or_mounted(m
, MOUNT_FAILURE_RESOURCES
);
892 static void mount_enter_unmounting(Mount
*m
) {
897 /* Start counting our attempts */
898 if (!IN_SET(m
->state
,
900 MOUNT_UNMOUNTING_SIGTERM
,
901 MOUNT_UNMOUNTING_SIGKILL
))
902 m
->n_retry_umount
= 0;
904 m
->control_command_id
= MOUNT_EXEC_UNMOUNT
;
905 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_UNMOUNT
;
907 r
= exec_command_set(m
->control_command
, UMOUNT_PATH
, m
->where
, "-c", NULL
);
908 if (r
>= 0 && m
->lazy_unmount
)
909 r
= exec_command_append(m
->control_command
, "-l", NULL
);
910 if (r
>= 0 && m
->force_unmount
)
911 r
= exec_command_append(m
->control_command
, "-f", NULL
);
915 mount_unwatch_control_pid(m
);
917 r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
);
921 mount_set_state(m
, MOUNT_UNMOUNTING
);
926 log_unit_warning_errno(UNIT(m
), r
, "Failed to run 'umount' task: %m");
927 mount_enter_dead_or_mounted(m
, MOUNT_FAILURE_RESOURCES
);
930 static void mount_enter_mounting(Mount
*m
) {
936 r
= unit_fail_if_noncanonical(UNIT(m
), m
->where
);
940 (void) mkdir_p_label(m
->where
, m
->directory_mode
);
942 unit_warn_if_dir_nonempty(UNIT(m
), m
->where
);
944 unit_warn_leftover_processes(UNIT(m
));
946 m
->control_command_id
= MOUNT_EXEC_MOUNT
;
947 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_MOUNT
;
949 /* Create the source directory for bind-mounts if needed */
950 p
= get_mount_parameters_fragment(m
);
951 if (p
&& mount_is_bind(p
))
952 (void) mkdir_p_label(p
->what
, m
->directory_mode
);
955 _cleanup_free_
char *opts
= NULL
;
957 r
= fstab_filter_options(p
->options
, "nofail\0" "noauto\0" "auto\0", NULL
, NULL
, &opts
);
961 r
= exec_command_set(m
->control_command
, MOUNT_PATH
, p
->what
, m
->where
, NULL
);
962 if (r
>= 0 && m
->sloppy_options
)
963 r
= exec_command_append(m
->control_command
, "-s", NULL
);
964 if (r
>= 0 && p
->fstype
)
965 r
= exec_command_append(m
->control_command
, "-t", p
->fstype
, NULL
);
966 if (r
>= 0 && !isempty(opts
))
967 r
= exec_command_append(m
->control_command
, "-o", opts
, NULL
);
973 mount_unwatch_control_pid(m
);
975 r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
);
979 mount_set_state(m
, MOUNT_MOUNTING
);
984 log_unit_warning_errno(UNIT(m
), r
, "Failed to run 'mount' task: %m");
985 mount_enter_dead_or_mounted(m
, MOUNT_FAILURE_RESOURCES
);
988 static void mount_set_reload_result(Mount
*m
, MountResult result
) {
991 /* Only store the first error we encounter */
992 if (m
->reload_result
!= MOUNT_SUCCESS
)
995 m
->reload_result
= result
;
998 static void mount_enter_remounting(Mount
*m
) {
1004 /* Reset reload result when we are about to start a new remount operation */
1005 m
->reload_result
= MOUNT_SUCCESS
;
1007 m
->control_command_id
= MOUNT_EXEC_REMOUNT
;
1008 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_REMOUNT
;
1010 p
= get_mount_parameters_fragment(m
);
1015 o
= strjoina("remount,", p
->options
);
1019 r
= exec_command_set(m
->control_command
, MOUNT_PATH
,
1022 if (r
>= 0 && m
->sloppy_options
)
1023 r
= exec_command_append(m
->control_command
, "-s", NULL
);
1024 if (r
>= 0 && p
->fstype
)
1025 r
= exec_command_append(m
->control_command
, "-t", p
->fstype
, NULL
);
1031 mount_unwatch_control_pid(m
);
1033 r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
);
1037 mount_set_state(m
, MOUNT_REMOUNTING
);
1042 log_unit_warning_errno(UNIT(m
), r
, "Failed to run 'remount' task: %m");
1043 mount_set_reload_result(m
, MOUNT_FAILURE_RESOURCES
);
1044 mount_enter_dead_or_mounted(m
, MOUNT_SUCCESS
);
1047 static int mount_start(Unit
*u
) {
1048 Mount
*m
= MOUNT(u
);
1053 /* We cannot fulfill this request right now, try again later
1055 if (IN_SET(m
->state
,
1057 MOUNT_UNMOUNTING_SIGTERM
,
1058 MOUNT_UNMOUNTING_SIGKILL
))
1061 /* Already on it! */
1062 if (m
->state
== MOUNT_MOUNTING
)
1065 assert(IN_SET(m
->state
, MOUNT_DEAD
, MOUNT_FAILED
));
1067 r
= unit_start_limit_test(u
);
1069 mount_enter_dead(m
, MOUNT_FAILURE_START_LIMIT_HIT
);
1073 r
= unit_acquire_invocation_id(u
);
1077 m
->result
= MOUNT_SUCCESS
;
1078 m
->reload_result
= MOUNT_SUCCESS
;
1079 exec_command_reset_status_array(m
->exec_command
, _MOUNT_EXEC_COMMAND_MAX
);
1081 u
->reset_accounting
= true;
1083 mount_enter_mounting(m
);
1087 static int mount_stop(Unit
*u
) {
1088 Mount
*m
= MOUNT(u
);
1094 case MOUNT_UNMOUNTING
:
1095 case MOUNT_UNMOUNTING_SIGKILL
:
1096 case MOUNT_UNMOUNTING_SIGTERM
:
1100 case MOUNT_MOUNTING
:
1101 case MOUNT_MOUNTING_DONE
:
1102 case MOUNT_REMOUNTING
:
1103 /* If we are still waiting for /bin/mount, we go directly into kill mode. */
1104 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGTERM
, MOUNT_SUCCESS
);
1107 case MOUNT_REMOUNTING_SIGTERM
:
1108 /* If we are already waiting for a hung remount, convert this to the matching unmounting state */
1109 mount_set_state(m
, MOUNT_UNMOUNTING_SIGTERM
);
1112 case MOUNT_REMOUNTING_SIGKILL
:
1114 mount_set_state(m
, MOUNT_UNMOUNTING_SIGKILL
);
1118 mount_enter_unmounting(m
);
1122 assert_not_reached("Unexpected state.");
1126 static int mount_reload(Unit
*u
) {
1127 Mount
*m
= MOUNT(u
);
1130 assert(m
->state
== MOUNT_MOUNTED
);
1132 mount_enter_remounting(m
);
1137 static int mount_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
1138 Mount
*m
= MOUNT(u
);
1144 (void) serialize_item(f
, "state", mount_state_to_string(m
->state
));
1145 (void) serialize_item(f
, "result", mount_result_to_string(m
->result
));
1146 (void) serialize_item(f
, "reload-result", mount_result_to_string(m
->reload_result
));
1148 if (m
->control_pid
> 0)
1149 (void) serialize_item_format(f
, "control-pid", PID_FMT
, m
->control_pid
);
1151 if (m
->control_command_id
>= 0)
1152 (void) serialize_item(f
, "control-command", mount_exec_command_to_string(m
->control_command_id
));
1157 static int mount_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
1158 Mount
*m
= MOUNT(u
);
1165 if (streq(key
, "state")) {
1168 if ((state
= mount_state_from_string(value
)) < 0)
1169 log_unit_debug(u
, "Failed to parse state value: %s", value
);
1171 m
->deserialized_state
= state
;
1172 } else if (streq(key
, "result")) {
1175 f
= mount_result_from_string(value
);
1177 log_unit_debug(u
, "Failed to parse result value: %s", value
);
1178 else if (f
!= MOUNT_SUCCESS
)
1181 } else if (streq(key
, "reload-result")) {
1184 f
= mount_result_from_string(value
);
1186 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
1187 else if (f
!= MOUNT_SUCCESS
)
1188 m
->reload_result
= f
;
1190 } else if (streq(key
, "control-pid")) {
1193 if (parse_pid(value
, &pid
) < 0)
1194 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
1196 m
->control_pid
= pid
;
1197 } else if (streq(key
, "control-command")) {
1198 MountExecCommand id
;
1200 id
= mount_exec_command_from_string(value
);
1202 log_unit_debug(u
, "Failed to parse exec-command value: %s", value
);
1204 m
->control_command_id
= id
;
1205 m
->control_command
= m
->exec_command
+ id
;
1208 log_unit_debug(u
, "Unknown serialization key: %s", key
);
1213 _pure_
static UnitActiveState
mount_active_state(Unit
*u
) {
1216 return state_translation_table
[MOUNT(u
)->state
];
1219 _pure_
static const char *mount_sub_state_to_string(Unit
*u
) {
1222 return mount_state_to_string(MOUNT(u
)->state
);
1225 _pure_
static bool mount_may_gc(Unit
*u
) {
1226 Mount
*m
= MOUNT(u
);
1230 if (m
->from_proc_self_mountinfo
)
1236 static void mount_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
1237 Mount
*m
= MOUNT(u
);
1243 if (pid
!= m
->control_pid
)
1248 if (is_clean_exit(code
, status
, EXIT_CLEAN_COMMAND
, NULL
))
1250 else if (code
== CLD_EXITED
)
1251 f
= MOUNT_FAILURE_EXIT_CODE
;
1252 else if (code
== CLD_KILLED
)
1253 f
= MOUNT_FAILURE_SIGNAL
;
1254 else if (code
== CLD_DUMPED
)
1255 f
= MOUNT_FAILURE_CORE_DUMP
;
1257 assert_not_reached("Unknown code");
1259 if (IN_SET(m
->state
, MOUNT_REMOUNTING
, MOUNT_REMOUNTING_SIGKILL
, MOUNT_REMOUNTING_SIGTERM
))
1260 mount_set_reload_result(m
, f
);
1261 else if (m
->result
== MOUNT_SUCCESS
)
1264 if (m
->control_command
) {
1265 exec_status_exit(&m
->control_command
->exec_status
, &m
->exec_context
, pid
, code
, status
);
1267 m
->control_command
= NULL
;
1268 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
1271 log_unit_full(u
, f
== MOUNT_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
, 0,
1272 "Mount process exited, code=%s status=%i", sigchld_code_to_string(code
), status
);
1274 /* Note that due to the io event priority logic, we can be sure the new mountinfo is loaded
1275 * before we process the SIGCHLD for the mount command. */
1279 case MOUNT_MOUNTING
:
1280 /* Our mount point has not appeared in mountinfo. Something went wrong. */
1282 if (f
== MOUNT_SUCCESS
) {
1283 /* Either /bin/mount has an unexpected definition of success,
1284 * or someone raced us and we lost. */
1285 log_unit_warning(UNIT(m
), "Mount process finished, but there is no mount.");
1286 f
= MOUNT_FAILURE_PROTOCOL
;
1288 mount_enter_dead(m
, f
);
1291 case MOUNT_MOUNTING_DONE
:
1292 mount_enter_mounted(m
, f
);
1295 case MOUNT_REMOUNTING
:
1296 case MOUNT_REMOUNTING_SIGTERM
:
1297 case MOUNT_REMOUNTING_SIGKILL
:
1298 mount_enter_dead_or_mounted(m
, MOUNT_SUCCESS
);
1301 case MOUNT_UNMOUNTING
:
1303 if (f
== MOUNT_SUCCESS
&& m
->from_proc_self_mountinfo
) {
1305 /* Still a mount point? If so, let's try again. Most likely there were multiple mount points
1306 * stacked on top of each other. We might exceed the timeout specified by the user overall,
1307 * but we will stop as soon as any one umount times out. */
1309 if (m
->n_retry_umount
< RETRY_UMOUNT_MAX
) {
1310 log_unit_debug(u
, "Mount still present, trying again.");
1311 m
->n_retry_umount
++;
1312 mount_enter_unmounting(m
);
1314 log_unit_warning(u
, "Mount still present after %u attempts to unmount, giving up.", m
->n_retry_umount
);
1315 mount_enter_mounted(m
, f
);
1318 mount_enter_dead_or_mounted(m
, f
);
1322 case MOUNT_UNMOUNTING_SIGKILL
:
1323 case MOUNT_UNMOUNTING_SIGTERM
:
1324 mount_enter_dead_or_mounted(m
, f
);
1328 assert_not_reached("Uh, control process died at wrong time.");
1331 /* Notify clients about changed exit status */
1332 unit_add_to_dbus_queue(u
);
1335 static int mount_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
1336 Mount
*m
= MOUNT(userdata
);
1339 assert(m
->timer_event_source
== source
);
1343 case MOUNT_MOUNTING
:
1344 case MOUNT_MOUNTING_DONE
:
1345 log_unit_warning(UNIT(m
), "Mounting timed out. Terminating.");
1346 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGTERM
, MOUNT_FAILURE_TIMEOUT
);
1349 case MOUNT_REMOUNTING
:
1350 log_unit_warning(UNIT(m
), "Remounting timed out. Terminating remount process.");
1351 mount_set_reload_result(m
, MOUNT_FAILURE_TIMEOUT
);
1352 mount_enter_signal(m
, MOUNT_REMOUNTING_SIGTERM
, MOUNT_SUCCESS
);
1355 case MOUNT_REMOUNTING_SIGTERM
:
1356 mount_set_reload_result(m
, MOUNT_FAILURE_TIMEOUT
);
1358 if (m
->kill_context
.send_sigkill
) {
1359 log_unit_warning(UNIT(m
), "Remounting timed out. Killing.");
1360 mount_enter_signal(m
, MOUNT_REMOUNTING_SIGKILL
, MOUNT_SUCCESS
);
1362 log_unit_warning(UNIT(m
), "Remounting timed out. Skipping SIGKILL. Ignoring.");
1363 mount_enter_dead_or_mounted(m
, MOUNT_SUCCESS
);
1367 case MOUNT_REMOUNTING_SIGKILL
:
1368 mount_set_reload_result(m
, MOUNT_FAILURE_TIMEOUT
);
1370 log_unit_warning(UNIT(m
), "Mount process still around after SIGKILL. Ignoring.");
1371 mount_enter_dead_or_mounted(m
, MOUNT_SUCCESS
);
1374 case MOUNT_UNMOUNTING
:
1375 log_unit_warning(UNIT(m
), "Unmounting timed out. Terminating.");
1376 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGTERM
, MOUNT_FAILURE_TIMEOUT
);
1379 case MOUNT_UNMOUNTING_SIGTERM
:
1380 if (m
->kill_context
.send_sigkill
) {
1381 log_unit_warning(UNIT(m
), "Mount process timed out. Killing.");
1382 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGKILL
, MOUNT_FAILURE_TIMEOUT
);
1384 log_unit_warning(UNIT(m
), "Mount process timed out. Skipping SIGKILL. Ignoring.");
1385 mount_enter_dead_or_mounted(m
, MOUNT_FAILURE_TIMEOUT
);
1389 case MOUNT_UNMOUNTING_SIGKILL
:
1390 log_unit_warning(UNIT(m
), "Mount process still around after SIGKILL. Ignoring.");
1391 mount_enter_dead_or_mounted(m
, MOUNT_FAILURE_TIMEOUT
);
1395 assert_not_reached("Timeout at wrong time.");
1407 static int mount_setup_new_unit(
1411 const char *options
,
1413 MountSetupFlags
*flags
) {
1420 u
->source_path
= strdup("/proc/self/mountinfo");
1421 MOUNT(u
)->where
= strdup(where
);
1422 if (!u
->source_path
|| !MOUNT(u
)->where
)
1425 /* Make sure to initialize those fields before mount_is_extrinsic(). */
1426 MOUNT(u
)->from_proc_self_mountinfo
= true;
1427 p
= &MOUNT(u
)->parameters_proc_self_mountinfo
;
1429 p
->what
= strdup(what
);
1430 p
->options
= strdup(options
);
1431 p
->fstype
= strdup(fstype
);
1432 if (!p
->what
|| !p
->options
|| !p
->fstype
)
1435 if (!mount_is_extrinsic(MOUNT(u
))) {
1439 target
= mount_is_network(p
) ? SPECIAL_REMOTE_FS_TARGET
: SPECIAL_LOCAL_FS_TARGET
;
1440 r
= unit_add_dependency_by_name(u
, UNIT_BEFORE
, target
, true, UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT
);
1444 r
= unit_add_dependency_by_name(u
, UNIT_CONFLICTS
, SPECIAL_UMOUNT_TARGET
, true, UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT
);
1449 unit_add_to_load_queue(u
);
1450 flags
->is_mounted
= true;
1451 flags
->just_mounted
= true;
1452 flags
->just_changed
= true;
1457 static int mount_setup_existing_unit(
1461 const char *options
,
1463 MountSetupFlags
*flags
) {
1466 bool load_extras
= false;
1472 if (!MOUNT(u
)->where
) {
1473 MOUNT(u
)->where
= strdup(where
);
1474 if (!MOUNT(u
)->where
)
1478 /* Make sure to initialize those fields before mount_is_extrinsic(). */
1479 p
= &MOUNT(u
)->parameters_proc_self_mountinfo
;
1481 r1
= free_and_strdup(&p
->what
, what
);
1482 r2
= free_and_strdup(&p
->options
, options
);
1483 r3
= free_and_strdup(&p
->fstype
, fstype
);
1484 if (r1
< 0 || r2
< 0 || r3
< 0)
1487 flags
->just_changed
= r1
> 0 || r2
> 0 || r3
> 0;
1488 flags
->is_mounted
= true;
1489 flags
->just_mounted
= !MOUNT(u
)->from_proc_self_mountinfo
|| MOUNT(u
)->just_mounted
;
1491 MOUNT(u
)->from_proc_self_mountinfo
= true;
1493 if (!mount_is_extrinsic(MOUNT(u
)) && mount_is_network(p
)) {
1494 /* _netdev option may have shown up late, or on a
1495 * remount. Add remote-fs dependencies, even though
1496 * local-fs ones may already be there.
1498 * Note: due to a current limitation (we don't track
1499 * in the dependency "Set*" objects who created a
1500 * dependency), we can only add deps, never lose them,
1501 * until the next full daemon-reload. */
1502 unit_add_dependency_by_name(u
, UNIT_BEFORE
, SPECIAL_REMOTE_FS_TARGET
, true, UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT
);
1506 if (u
->load_state
== UNIT_NOT_FOUND
) {
1507 u
->load_state
= UNIT_LOADED
;
1510 /* Load in the extras later on, after we
1511 * finished initialization of the unit */
1513 /* FIXME: since we're going to load the unit later on, why setting load_extras=true ? */
1515 flags
->just_changed
= true;
1519 return mount_add_extras(MOUNT(u
));
1524 static int mount_setup_unit(
1528 const char *options
,
1532 _cleanup_free_
char *e
= NULL
;
1533 MountSetupFlags flags
;
1543 /* Ignore API mount points. They should never be referenced in
1544 * dependencies ever. */
1545 if (mount_point_is_api(where
) || mount_point_ignore(where
))
1548 if (streq(fstype
, "autofs"))
1551 /* probably some kind of swap, ignore */
1552 if (!is_path(where
))
1555 r
= unit_name_from_path(where
, ".mount", &e
);
1559 u
= manager_get_unit(m
, e
);
1561 /* First time we see this mount point meaning that it's
1562 * not been initiated by a mount unit but rather by the
1563 * sysadmin having called mount(8) directly. */
1564 r
= unit_new_for_name(m
, sizeof(Mount
), e
, &u
);
1568 r
= mount_setup_new_unit(u
, what
, where
, options
, fstype
, &flags
);
1572 r
= mount_setup_existing_unit(u
, what
, where
, options
, fstype
, &flags
);
1578 MOUNT(u
)->is_mounted
= flags
.is_mounted
;
1579 MOUNT(u
)->just_mounted
= flags
.just_mounted
;
1580 MOUNT(u
)->just_changed
= flags
.just_changed
;
1583 if (flags
.just_changed
)
1584 unit_add_to_dbus_queue(u
);
1588 return log_warning_errno(r
, "Failed to set up mount unit: %m");
1591 static int mount_load_proc_self_mountinfo(Manager
*m
, bool set_flags
) {
1592 _cleanup_(mnt_free_tablep
) struct libmnt_table
*t
= NULL
;
1593 _cleanup_(mnt_free_iterp
) struct libmnt_iter
*i
= NULL
;
1598 t
= mnt_new_table();
1599 i
= mnt_new_iter(MNT_ITER_FORWARD
);
1603 r
= mnt_table_parse_mtab(t
, NULL
);
1605 return log_error_errno(r
, "Failed to parse /proc/self/mountinfo: %m");
1609 struct libmnt_fs
*fs
;
1610 const char *device
, *path
, *options
, *fstype
;
1611 _cleanup_free_
char *d
= NULL
, *p
= NULL
;
1614 k
= mnt_table_next_fs(t
, i
, &fs
);
1618 return log_error_errno(k
, "Failed to get next entry from /proc/self/mountinfo: %m");
1620 device
= mnt_fs_get_source(fs
);
1621 path
= mnt_fs_get_target(fs
);
1622 options
= mnt_fs_get_options(fs
);
1623 fstype
= mnt_fs_get_fstype(fs
);
1625 if (!device
|| !path
)
1628 if (cunescape(device
, UNESCAPE_RELAX
, &d
) < 0)
1631 if (cunescape(path
, UNESCAPE_RELAX
, &p
) < 0)
1634 device_found_node(m
, d
, DEVICE_FOUND_MOUNT
, DEVICE_FOUND_MOUNT
);
1636 k
= mount_setup_unit(m
, d
, p
, options
, fstype
, set_flags
);
1637 if (r
== 0 && k
< 0)
1644 static void mount_shutdown(Manager
*m
) {
1647 m
->mount_event_source
= sd_event_source_unref(m
->mount_event_source
);
1649 mnt_unref_monitor(m
->mount_monitor
);
1650 m
->mount_monitor
= NULL
;
1653 static int mount_get_timeout(Unit
*u
, usec_t
*timeout
) {
1654 Mount
*m
= MOUNT(u
);
1658 if (!m
->timer_event_source
)
1661 r
= sd_event_source_get_time(m
->timer_event_source
, &t
);
1664 if (t
== USEC_INFINITY
)
1671 static void mount_enumerate_perpetual(Manager
*m
) {
1677 /* Whatever happens, we know for sure that the root directory is around, and cannot go away. Let's
1678 * unconditionally synthesize it here and mark it as perpetual. */
1680 u
= manager_get_unit(m
, SPECIAL_ROOT_MOUNT
);
1682 r
= unit_new_for_name(m
, sizeof(Mount
), SPECIAL_ROOT_MOUNT
, &u
);
1684 log_error_errno(r
, "Failed to allocate the special " SPECIAL_ROOT_MOUNT
" unit: %m");
1689 u
->perpetual
= true;
1690 MOUNT(u
)->deserialized_state
= MOUNT_MOUNTED
;
1692 unit_add_to_load_queue(u
);
1693 unit_add_to_dbus_queue(u
);
1696 static bool mount_is_mounted(Mount
*m
) {
1699 return UNIT(m
)->perpetual
|| m
->is_mounted
;
1702 static void mount_enumerate(Manager
*m
) {
1709 if (!m
->mount_monitor
) {
1712 m
->mount_monitor
= mnt_new_monitor();
1713 if (!m
->mount_monitor
) {
1718 r
= mnt_monitor_enable_kernel(m
->mount_monitor
, 1);
1720 log_error_errno(r
, "Failed to enable watching of kernel mount events: %m");
1724 r
= mnt_monitor_enable_userspace(m
->mount_monitor
, 1, NULL
);
1726 log_error_errno(r
, "Failed to enable watching of userspace mount events: %m");
1730 /* mnt_unref_monitor() will close the fd */
1731 fd
= r
= mnt_monitor_get_fd(m
->mount_monitor
);
1733 log_error_errno(r
, "Failed to acquire watch file descriptor: %m");
1737 r
= sd_event_add_io(m
->event
, &m
->mount_event_source
, fd
, EPOLLIN
, mount_dispatch_io
, m
);
1739 log_error_errno(r
, "Failed to watch mount file descriptor: %m");
1743 r
= sd_event_source_set_priority(m
->mount_event_source
, SD_EVENT_PRIORITY_NORMAL
-10);
1745 log_error_errno(r
, "Failed to adjust mount watch priority: %m");
1749 (void) sd_event_source_set_description(m
->mount_event_source
, "mount-monitor-dispatch");
1752 r
= mount_load_proc_self_mountinfo(m
, false);
1762 static int mount_dispatch_io(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
1763 _cleanup_set_free_ Set
*around
= NULL
, *gone
= NULL
;
1764 Manager
*m
= userdata
;
1771 assert(revents
& EPOLLIN
);
1773 if (fd
== mnt_monitor_get_fd(m
->mount_monitor
)) {
1774 bool rescan
= false;
1776 /* Drain all events and verify that the event is valid.
1778 * Note that libmount also monitors /run/mount mkdir if the
1779 * directory does not exist yet. The mkdir may generate event
1780 * which is irrelevant for us.
1782 * error: r < 0; valid: r == 0, false positive: rc == 1 */
1784 r
= mnt_monitor_next_change(m
->mount_monitor
, NULL
, NULL
);
1788 return log_error_errno(r
, "Failed to drain libmount events: %m");
1791 log_debug("libmount event [rescan: %s]", yes_no(rescan
));
1796 r
= mount_load_proc_self_mountinfo(m
, true);
1798 /* Reset flags, just in case, for later calls */
1799 LIST_FOREACH(units_by_type
, u
, m
->units_by_type
[UNIT_MOUNT
]) {
1800 Mount
*mount
= MOUNT(u
);
1802 mount
->is_mounted
= mount
->just_mounted
= mount
->just_changed
= false;
1808 manager_dispatch_load_queue(m
);
1810 LIST_FOREACH(units_by_type
, u
, m
->units_by_type
[UNIT_MOUNT
]) {
1811 Mount
*mount
= MOUNT(u
);
1813 if (!mount_is_mounted(mount
)) {
1815 /* A mount point is not around right now. It
1816 * might be gone, or might never have
1819 if (mount
->from_proc_self_mountinfo
&&
1820 mount
->parameters_proc_self_mountinfo
.what
) {
1822 /* Remember that this device might just have disappeared */
1823 if (set_ensure_allocated(&gone
, &path_hash_ops
) < 0 ||
1824 set_put(gone
, mount
->parameters_proc_self_mountinfo
.what
) < 0)
1825 log_oom(); /* we don't care too much about OOM here... */
1828 mount
->from_proc_self_mountinfo
= false;
1830 switch (mount
->state
) {
1833 /* This has just been unmounted by
1834 * somebody else, follow the state
1836 mount
->result
= MOUNT_SUCCESS
; /* make sure we forget any earlier umount failures */
1837 mount_enter_dead(mount
, MOUNT_SUCCESS
);
1844 } else if (mount
->just_mounted
|| mount
->just_changed
) {
1846 /* A mount point was added or changed */
1848 switch (mount
->state
) {
1853 /* This has just been mounted by somebody else, follow the state change, but let's
1854 * generate a new invocation ID for this implicitly and automatically. */
1855 (void) unit_acquire_invocation_id(UNIT(mount
));
1856 mount_enter_mounted(mount
, MOUNT_SUCCESS
);
1859 case MOUNT_MOUNTING
:
1860 mount_set_state(mount
, MOUNT_MOUNTING_DONE
);
1864 /* Nothing really changed, but let's
1865 * issue an notification call
1866 * nonetheless, in case somebody is
1867 * waiting for this. (e.g. file system
1868 * ro/rw remounts.) */
1869 mount_set_state(mount
, mount
->state
);
1874 if (mount_is_mounted(mount
) &&
1875 mount
->from_proc_self_mountinfo
&&
1876 mount
->parameters_proc_self_mountinfo
.what
) {
1878 if (set_ensure_allocated(&around
, &path_hash_ops
) < 0 ||
1879 set_put(around
, mount
->parameters_proc_self_mountinfo
.what
) < 0)
1883 /* Reset the flags for later calls */
1884 mount
->is_mounted
= mount
->just_mounted
= mount
->just_changed
= false;
1887 SET_FOREACH(what
, gone
, i
) {
1888 if (set_contains(around
, what
))
1891 /* Let the device units know that the device is no longer mounted */
1892 device_found_node(m
, what
, 0, DEVICE_FOUND_MOUNT
);
1898 static void mount_reset_failed(Unit
*u
) {
1899 Mount
*m
= MOUNT(u
);
1903 if (m
->state
== MOUNT_FAILED
)
1904 mount_set_state(m
, MOUNT_DEAD
);
1906 m
->result
= MOUNT_SUCCESS
;
1907 m
->reload_result
= MOUNT_SUCCESS
;
1910 static int mount_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
1911 Mount
*m
= MOUNT(u
);
1915 return unit_kill_common(u
, who
, signo
, -1, MOUNT(u
)->control_pid
, error
);
1918 static int mount_control_pid(Unit
*u
) {
1919 Mount
*m
= MOUNT(u
);
1923 return m
->control_pid
;
1926 static const char* const mount_exec_command_table
[_MOUNT_EXEC_COMMAND_MAX
] = {
1927 [MOUNT_EXEC_MOUNT
] = "ExecMount",
1928 [MOUNT_EXEC_UNMOUNT
] = "ExecUnmount",
1929 [MOUNT_EXEC_REMOUNT
] = "ExecRemount",
1932 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command
, MountExecCommand
);
1934 static const char* const mount_result_table
[_MOUNT_RESULT_MAX
] = {
1935 [MOUNT_SUCCESS
] = "success",
1936 [MOUNT_FAILURE_RESOURCES
] = "resources",
1937 [MOUNT_FAILURE_TIMEOUT
] = "timeout",
1938 [MOUNT_FAILURE_EXIT_CODE
] = "exit-code",
1939 [MOUNT_FAILURE_SIGNAL
] = "signal",
1940 [MOUNT_FAILURE_CORE_DUMP
] = "core-dump",
1941 [MOUNT_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
1942 [MOUNT_FAILURE_PROTOCOL
] = "protocol",
1945 DEFINE_STRING_TABLE_LOOKUP(mount_result
, MountResult
);
1947 const UnitVTable mount_vtable
= {
1948 .object_size
= sizeof(Mount
),
1949 .exec_context_offset
= offsetof(Mount
, exec_context
),
1950 .cgroup_context_offset
= offsetof(Mount
, cgroup_context
),
1951 .kill_context_offset
= offsetof(Mount
, kill_context
),
1952 .exec_runtime_offset
= offsetof(Mount
, exec_runtime
),
1953 .dynamic_creds_offset
= offsetof(Mount
, dynamic_creds
),
1959 .private_section
= "Mount",
1965 .coldplug
= mount_coldplug
,
1969 .start
= mount_start
,
1971 .reload
= mount_reload
,
1975 .serialize
= mount_serialize
,
1976 .deserialize_item
= mount_deserialize_item
,
1978 .active_state
= mount_active_state
,
1979 .sub_state_to_string
= mount_sub_state_to_string
,
1981 .may_gc
= mount_may_gc
,
1983 .sigchld_event
= mount_sigchld_event
,
1985 .reset_failed
= mount_reset_failed
,
1987 .control_pid
= mount_control_pid
,
1989 .bus_vtable
= bus_mount_vtable
,
1990 .bus_set_property
= bus_mount_set_property
,
1991 .bus_commit_properties
= bus_mount_commit_properties
,
1993 .get_timeout
= mount_get_timeout
,
1995 .can_transient
= true,
1997 .enumerate_perpetual
= mount_enumerate_perpetual
,
1998 .enumerate
= mount_enumerate
,
1999 .shutdown
= mount_shutdown
,
2001 .status_message_formats
= {
2002 .starting_stopping
= {
2003 [0] = "Mounting %s...",
2004 [1] = "Unmounting %s...",
2006 .finished_start_job
= {
2007 [JOB_DONE
] = "Mounted %s.",
2008 [JOB_FAILED
] = "Failed to mount %s.",
2009 [JOB_TIMEOUT
] = "Timed out mounting %s.",
2011 .finished_stop_job
= {
2012 [JOB_DONE
] = "Unmounted %s.",
2013 [JOB_FAILED
] = "Failed unmounting %s.",
2014 [JOB_TIMEOUT
] = "Timed out unmounting %s.",