1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
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 General Public License as published by
10 the Free Software Foundation; either version 2 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 General Public License for more details.
18 You should have received a copy of the GNU 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"
34 #include "mount-setup.h"
35 #include "unit-name.h"
37 #include "dbus-mount.h"
39 static const UnitActiveState state_translation_table
[_MOUNT_STATE_MAX
] = {
40 [MOUNT_DEAD
] = UNIT_INACTIVE
,
41 [MOUNT_MOUNTING
] = UNIT_ACTIVATING
,
42 [MOUNT_MOUNTING_DONE
] = UNIT_ACTIVE
,
43 [MOUNT_MOUNTED
] = UNIT_ACTIVE
,
44 [MOUNT_REMOUNTING
] = UNIT_ACTIVE_RELOADING
,
45 [MOUNT_UNMOUNTING
] = UNIT_DEACTIVATING
,
46 [MOUNT_MOUNTING_SIGTERM
] = UNIT_DEACTIVATING
,
47 [MOUNT_MOUNTING_SIGKILL
] = UNIT_DEACTIVATING
,
48 [MOUNT_REMOUNTING_SIGTERM
] = UNIT_ACTIVE_RELOADING
,
49 [MOUNT_REMOUNTING_SIGKILL
] = UNIT_ACTIVE_RELOADING
,
50 [MOUNT_UNMOUNTING_SIGTERM
] = UNIT_DEACTIVATING
,
51 [MOUNT_UNMOUNTING_SIGKILL
] = UNIT_DEACTIVATING
,
52 [MOUNT_MAINTAINANCE
] = UNIT_INACTIVE
,
55 static void mount_init(Unit
*u
) {
59 assert(u
->meta
.load_state
== UNIT_STUB
);
61 m
->timeout_usec
= DEFAULT_TIMEOUT_USEC
;
62 exec_context_init(&m
->exec_context
);
64 /* We need to make sure that /bin/mount is always called in
65 * the same process group as us, so that the autofs kernel
66 * side doesn't send us another mount request while we are
67 * already trying to comply its last one. */
68 m
->exec_context
.no_setsid
= true;
70 m
->timer_watch
.type
= WATCH_INVALID
;
72 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
75 static void mount_unwatch_control_pid(Mount
*m
) {
78 if (m
->control_pid
<= 0)
81 unit_unwatch_pid(UNIT(m
), m
->control_pid
);
85 static void mount_parameters_done(MountParameters
*p
) {
92 p
->what
= p
->options
= p
->fstype
= NULL
;
95 static void mount_done(Unit
*u
) {
103 mount_parameters_done(&m
->parameters_etc_fstab
);
104 mount_parameters_done(&m
->parameters_proc_self_mountinfo
);
105 mount_parameters_done(&m
->parameters_fragment
);
107 exec_context_done(&m
->exec_context
);
108 exec_command_done_array(m
->exec_command
, _MOUNT_EXEC_COMMAND_MAX
);
109 m
->control_command
= NULL
;
111 mount_unwatch_control_pid(m
);
113 unit_unwatch_timer(u
, &m
->timer_watch
);
116 int mount_add_node_links(Unit
*u
, const char *what
) {
124 /* We observe kernel mounts only while they are live,
125 * hence don't create any links for them */
128 /* Adds in links to the device that this node is based on */
130 if (!path_startswith(what
, "/dev/"))
133 if (!(e
= unit_name_build_escape(what
+1, NULL
, ".device")))
136 r
= manager_load_unit(u
->meta
.manager
, e
, NULL
, &device
);
142 if ((r
= unit_add_dependency(u
, UNIT_AFTER
, device
, true)) < 0)
145 if ((r
= unit_add_dependency(u
, UNIT_REQUIRES
, device
, true)) < 0)
148 if (u
->meta
.manager
->running_as
== MANAGER_INIT
||
149 u
->meta
.manager
->running_as
== MANAGER_SYSTEM
)
150 if ((r
= unit_add_dependency(device
, UNIT_WANTS
, u
, false)) < 0)
156 int mount_add_path_links(Unit
*u
, const char *where
, bool requires
) {
162 /* Adds in link to other mount points, that might lie below or
163 * above us in the hierarchy */
165 LIST_FOREACH(units_per_type
, other
, u
->meta
.manager
->units_per_type
[UNIT_MOUNT
]) {
173 if (u
->meta
.load_state
!= UNIT_LOADED
)
176 if (path_startswith(where
, n
->where
)) {
178 if ((r
= unit_add_dependency(u
, UNIT_AFTER
, UNIT(other
), true)) < 0)
182 if ((r
= unit_add_dependency(u
, UNIT_REQUIRES
, UNIT(other
), true)) < 0)
185 } else if (path_startswith(n
->where
, where
)) {
187 if ((r
= unit_add_dependency(u
, UNIT_BEFORE
, UNIT(other
), true)) < 0)
191 if ((r
= unit_add_dependency(UNIT(other
), UNIT_REQUIRES
, u
, true)) < 0)
199 static char* mount_test_option(const char *haystack
, const char *needle
) {
204 /* Like glibc's hasmntopt(), but works on a string, not a
211 me
.mnt_opts
= (char*) haystack
;
213 return hasmntopt(&me
, needle
);
216 static int mount_add_target_links(Mount
*m
) {
221 bool noauto
, handle
, automount
;
225 if (m
->from_fragment
)
226 p
= &m
->parameters_fragment
;
227 else if (m
->from_etc_fstab
)
228 p
= &m
->parameters_etc_fstab
;
232 noauto
= !!mount_test_option(p
->options
, MNTOPT_NOAUTO
);
233 handle
= !!mount_test_option(p
->options
, "comment=systemd.mount");
234 automount
= !!mount_test_option(p
->options
, "comment=systemd.automount");
236 if (noauto
&& !handle
&& !automount
)
239 if (mount_test_option(p
->options
, "_netdev") ||
240 fstype_is_network(p
->fstype
))
241 target
= SPECIAL_REMOTE_FS_TARGET
;
243 target
= SPECIAL_LOCAL_FS_TARGET
;
245 if ((r
= manager_load_unit(UNIT(m
)->meta
.manager
, target
, NULL
, &tu
)) < 0)
251 if ((r
= unit_load_related_unit(UNIT(m
), ".automount", &am
)) < 0)
254 if ((r
= unit_add_dependency(tu
, UNIT_WANTS
, UNIT(am
), true)) < 0)
257 return unit_add_dependency(UNIT(am
), UNIT_BEFORE
, tu
, true);
262 if ((r
= unit_add_dependency(tu
, UNIT_WANTS
, UNIT(m
), true)) < 0)
265 return unit_add_dependency(UNIT(m
), UNIT_BEFORE
, tu
, true);
269 static int mount_verify(Mount
*m
) {
274 if (UNIT(m
)->meta
.load_state
!= UNIT_LOADED
)
277 if (!(e
= unit_name_from_path(m
->where
, ".mount")))
280 b
= unit_has_name(UNIT(m
), e
);
284 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m
)->meta
.id
);
291 static int mount_load(Unit
*u
) {
296 assert(u
->meta
.load_state
== UNIT_STUB
);
298 if ((r
= unit_load_fragment_and_dropin_optional(u
)) < 0)
301 /* This is a new unit? Then let's add in some extras */
302 if (u
->meta
.load_state
== UNIT_LOADED
) {
303 const char *what
= m
->parameters_fragment
.what
;
305 what
= m
->parameters_etc_fstab
.what
;
308 if (!(m
->where
= unit_name_to_path(u
->meta
.id
)))
311 path_kill_slashes(m
->where
);
313 /* Minor validity checking */
314 if ((m
->parameters_fragment
.options
|| m
->parameters_fragment
.fstype
) && !m
->parameters_fragment
.what
)
317 if (m
->parameters_fragment
.what
)
318 m
->from_fragment
= true;
320 if ((r
= mount_add_node_links(u
, what
)) < 0)
323 if ((r
= mount_add_path_links(u
, m
->where
, m
->from_etc_fstab
|| m
->from_fragment
)) < 0)
326 if ((r
= mount_add_target_links(MOUNT(u
))) < 0)
329 if ((r
= unit_add_default_cgroup(u
)) < 0)
333 return mount_verify(m
);
336 static int mount_notify_automount(Mount
*m
, int status
) {
342 if ((r
= unit_get_related_unit(UNIT(m
), ".automount", &p
)) < 0)
343 return r
== -ENOENT
? 0 : r
;
345 return automount_send_ready(AUTOMOUNT(p
), status
);
348 static void mount_set_state(Mount
*m
, MountState state
) {
349 MountState old_state
;
352 old_state
= m
->state
;
355 if (state
!= MOUNT_MOUNTING
&&
356 state
!= MOUNT_MOUNTING_DONE
&&
357 state
!= MOUNT_REMOUNTING
&&
358 state
!= MOUNT_UNMOUNTING
&&
359 state
!= MOUNT_MOUNTING_SIGTERM
&&
360 state
!= MOUNT_MOUNTING_SIGKILL
&&
361 state
!= MOUNT_UNMOUNTING_SIGTERM
&&
362 state
!= MOUNT_UNMOUNTING_SIGKILL
&&
363 state
!= MOUNT_REMOUNTING_SIGTERM
&&
364 state
!= MOUNT_REMOUNTING_SIGKILL
) {
365 unit_unwatch_timer(UNIT(m
), &m
->timer_watch
);
366 mount_unwatch_control_pid(m
);
367 m
->control_command
= NULL
;
368 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
371 if (state
== MOUNT_MOUNTED
||
372 state
== MOUNT_REMOUNTING
)
373 mount_notify_automount(m
, 0);
374 else if (state
== MOUNT_DEAD
||
375 state
== MOUNT_UNMOUNTING
||
376 state
== MOUNT_MOUNTING_SIGTERM
||
377 state
== MOUNT_MOUNTING_SIGKILL
||
378 state
== MOUNT_REMOUNTING_SIGTERM
||
379 state
== MOUNT_REMOUNTING_SIGKILL
||
380 state
== MOUNT_UNMOUNTING_SIGTERM
||
381 state
== MOUNT_UNMOUNTING_SIGKILL
||
382 state
== MOUNT_MAINTAINANCE
)
383 mount_notify_automount(m
, -ENODEV
);
385 if (state
!= old_state
)
386 log_debug("%s changed %s -> %s",
388 mount_state_to_string(old_state
),
389 mount_state_to_string(state
));
391 unit_notify(UNIT(m
), state_translation_table
[old_state
], state_translation_table
[state
]);
394 static int mount_coldplug(Unit
*u
) {
396 MountState new_state
= MOUNT_DEAD
;
400 assert(m
->state
== MOUNT_DEAD
);
402 if (m
->deserialized_state
!= m
->state
)
403 new_state
= m
->deserialized_state
;
404 else if (m
->from_proc_self_mountinfo
)
405 new_state
= MOUNT_MOUNTED
;
407 if (new_state
!= m
->state
) {
409 if (new_state
== MOUNT_MOUNTING
||
410 new_state
== MOUNT_MOUNTING_DONE
||
411 new_state
== MOUNT_REMOUNTING
||
412 new_state
== MOUNT_UNMOUNTING
||
413 new_state
== MOUNT_MOUNTING_SIGTERM
||
414 new_state
== MOUNT_MOUNTING_SIGKILL
||
415 new_state
== MOUNT_UNMOUNTING_SIGTERM
||
416 new_state
== MOUNT_UNMOUNTING_SIGKILL
||
417 new_state
== MOUNT_REMOUNTING_SIGTERM
||
418 new_state
== MOUNT_REMOUNTING_SIGKILL
) {
420 if (m
->control_pid
<= 0)
423 if ((r
= unit_watch_pid(UNIT(m
), m
->control_pid
)) < 0)
426 if ((r
= unit_watch_timer(UNIT(m
), m
->timeout_usec
, &m
->timer_watch
)) < 0)
430 mount_set_state(m
, new_state
);
436 static void mount_dump(Unit
*u
, FILE *f
, const char *prefix
) {
443 if (m
->from_proc_self_mountinfo
)
444 p
= &m
->parameters_proc_self_mountinfo
;
445 else if (m
->from_fragment
)
446 p
= &m
->parameters_fragment
;
448 p
= &m
->parameters_etc_fstab
;
451 "%sMount State: %s\n"
454 "%sFile System Type: %s\n"
456 "%sFrom /etc/fstab: %s\n"
457 "%sFrom /proc/self/mountinfo: %s\n"
458 "%sFrom fragment: %s\n"
460 prefix
, mount_state_to_string(m
->state
),
462 prefix
, strna(p
->what
),
463 prefix
, strna(p
->fstype
),
464 prefix
, strna(p
->options
),
465 prefix
, yes_no(m
->from_etc_fstab
),
466 prefix
, yes_no(m
->from_proc_self_mountinfo
),
467 prefix
, yes_no(m
->from_fragment
),
468 prefix
, kill_mode_to_string(m
->kill_mode
));
470 if (m
->control_pid
> 0)
472 "%sControl PID: %llu\n",
473 prefix
, (unsigned long long) m
->control_pid
);
475 exec_context_dump(&m
->exec_context
, f
, prefix
);
478 static int mount_spawn(Mount
*m
, ExecCommand
*c
, pid_t
*_pid
) {
486 if ((r
= unit_watch_timer(UNIT(m
), m
->timeout_usec
, &m
->timer_watch
)) < 0)
489 if ((r
= exec_spawn(c
,
493 m
->meta
.manager
->environment
,
496 UNIT(m
)->meta
.manager
->confirm_spawn
,
497 UNIT(m
)->meta
.cgroup_bondings
,
501 if ((r
= unit_watch_pid(UNIT(m
), pid
)) < 0)
502 /* FIXME: we need to do something here */
510 unit_unwatch_timer(UNIT(m
), &m
->timer_watch
);
515 static void mount_enter_dead(Mount
*m
, bool success
) {
521 mount_set_state(m
, m
->failure
? MOUNT_MAINTAINANCE
: MOUNT_DEAD
);
524 static void mount_enter_mounted(Mount
*m
, bool success
) {
530 mount_set_state(m
, MOUNT_MOUNTED
);
533 static void mount_enter_signal(Mount
*m
, MountState state
, bool success
) {
542 if (m
->kill_mode
!= KILL_NONE
) {
543 int sig
= (state
== MOUNT_MOUNTING_SIGTERM
||
544 state
== MOUNT_UNMOUNTING_SIGTERM
||
545 state
== MOUNT_REMOUNTING_SIGTERM
) ? SIGTERM
: SIGKILL
;
547 if (m
->kill_mode
== KILL_CONTROL_GROUP
) {
549 if ((r
= cgroup_bonding_kill_list(UNIT(m
)->meta
.cgroup_bondings
, sig
)) < 0) {
550 if (r
!= -EAGAIN
&& r
!= -ESRCH
)
556 if (!sent
&& m
->control_pid
> 0)
557 if (kill(m
->kill_mode
== KILL_PROCESS
? m
->control_pid
: -m
->control_pid
, sig
) < 0 && errno
!= ESRCH
) {
564 if ((r
= unit_watch_timer(UNIT(m
), m
->timeout_usec
, &m
->timer_watch
)) < 0)
567 mount_set_state(m
, state
);
568 } else if (state
== MOUNT_REMOUNTING_SIGTERM
|| state
== MOUNT_REMOUNTING_SIGKILL
)
569 mount_enter_mounted(m
, true);
571 mount_enter_dead(m
, true);
576 log_warning("%s failed to kill processes: %s", UNIT(m
)->meta
.id
, strerror(-r
));
578 if (state
== MOUNT_REMOUNTING_SIGTERM
|| state
== MOUNT_REMOUNTING_SIGKILL
)
579 mount_enter_mounted(m
, false);
581 mount_enter_dead(m
, false);
584 static void mount_enter_unmounting(Mount
*m
, bool success
) {
592 m
->control_command_id
= MOUNT_EXEC_UNMOUNT
;
593 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_UNMOUNT
;
595 if ((r
= exec_command_set(
602 mount_unwatch_control_pid(m
);
604 if ((r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
)) < 0)
607 mount_set_state(m
, MOUNT_UNMOUNTING
);
612 log_warning("%s failed to run umount exectuable: %s", UNIT(m
)->meta
.id
, strerror(-r
));
613 mount_enter_mounted(m
, false);
616 static void mount_enter_mounting(Mount
*m
) {
621 m
->control_command_id
= MOUNT_EXEC_MOUNT
;
622 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_MOUNT
;
624 if (m
->from_fragment
)
625 r
= exec_command_set(
628 m
->parameters_fragment
.what
,
630 "-t", m
->parameters_fragment
.fstype
,
631 m
->parameters_fragment
.options
? "-o" : NULL
, m
->parameters_fragment
.options
,
633 else if (m
->from_etc_fstab
)
634 r
= exec_command_set(
645 mount_unwatch_control_pid(m
);
647 if ((r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
)) < 0)
650 mount_set_state(m
, MOUNT_MOUNTING
);
655 log_warning("%s failed to run mount exectuable: %s", UNIT(m
)->meta
.id
, strerror(-r
));
656 mount_enter_dead(m
, false);
659 static void mount_enter_mounting_done(Mount
*m
) {
662 mount_set_state(m
, MOUNT_MOUNTING_DONE
);
665 static void mount_enter_remounting(Mount
*m
, bool success
) {
673 m
->control_command_id
= MOUNT_EXEC_REMOUNT
;
674 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_REMOUNT
;
676 if (m
->from_fragment
) {
680 if (m
->parameters_fragment
.options
) {
681 if (!(buf
= strappend("remount,", m
->parameters_fragment
.options
))) {
690 r
= exec_command_set(
693 m
->parameters_fragment
.what
,
695 "-t", m
->parameters_fragment
.fstype
,
700 } else if (m
->from_etc_fstab
)
701 r
= exec_command_set(
715 mount_unwatch_control_pid(m
);
717 if ((r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
)) < 0)
720 mount_set_state(m
, MOUNT_REMOUNTING
);
725 mount_enter_mounted(m
, false);
728 static int mount_start(Unit
*u
) {
733 /* We cannot fulfill this request right now, try again later
735 if (m
->state
== MOUNT_UNMOUNTING
||
736 m
->state
== MOUNT_UNMOUNTING_SIGTERM
||
737 m
->state
== MOUNT_UNMOUNTING_SIGKILL
)
741 if (m
->state
== MOUNT_MOUNTING
||
742 m
->state
== MOUNT_MOUNTING_SIGTERM
||
743 m
->state
== MOUNT_MOUNTING_SIGKILL
)
746 assert(m
->state
== MOUNT_DEAD
|| m
->state
== MOUNT_MAINTAINANCE
);
749 mount_enter_mounting(m
);
753 static int mount_stop(Unit
*u
) {
758 /* Cann't do this right now. */
759 if (m
->state
== MOUNT_MOUNTING
||
760 m
->state
== MOUNT_MOUNTING_DONE
||
761 m
->state
== MOUNT_MOUNTING_SIGTERM
||
762 m
->state
== MOUNT_MOUNTING_SIGKILL
||
763 m
->state
== MOUNT_REMOUNTING
||
764 m
->state
== MOUNT_REMOUNTING_SIGTERM
||
765 m
->state
== MOUNT_REMOUNTING_SIGKILL
)
769 if (m
->state
== MOUNT_UNMOUNTING
||
770 m
->state
== MOUNT_UNMOUNTING_SIGKILL
||
771 m
->state
== MOUNT_UNMOUNTING_SIGTERM
)
774 assert(m
->state
== MOUNT_MOUNTED
);
776 mount_enter_unmounting(m
, true);
780 static int mount_reload(Unit
*u
) {
785 if (m
->state
== MOUNT_MOUNTING_DONE
)
788 assert(m
->state
== MOUNT_MOUNTED
);
790 mount_enter_remounting(m
, true);
794 static int mount_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
801 unit_serialize_item(u
, f
, "state", mount_state_to_string(m
->state
));
802 unit_serialize_item(u
, f
, "failure", yes_no(m
->failure
));
804 if (m
->control_pid
> 0)
805 unit_serialize_item_format(u
, f
, "control-pid", "%u", (unsigned) m
->control_pid
);
807 if (m
->control_command_id
>= 0)
808 unit_serialize_item(u
, f
, "control-command", mount_exec_command_to_string(m
->control_command_id
));
813 static int mount_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
822 if (streq(key
, "state")) {
825 if ((state
= mount_state_from_string(value
)) < 0)
826 log_debug("Failed to parse state value %s", value
);
828 m
->deserialized_state
= state
;
829 } else if (streq(key
, "failure")) {
832 if ((b
= parse_boolean(value
)) < 0)
833 log_debug("Failed to parse failure value %s", value
);
835 m
->failure
= b
|| m
->failure
;
837 } else if (streq(key
, "control-pid")) {
840 if ((r
= safe_atou(value
, &pid
)) < 0 || pid
<= 0)
841 log_debug("Failed to parse control-pid value %s", value
);
843 m
->control_pid
= (pid_t
) pid
;
844 } else if (streq(key
, "control-command")) {
847 if ((id
= mount_exec_command_from_string(value
)) < 0)
848 log_debug("Failed to parse exec-command value %s", value
);
850 m
->control_command_id
= id
;
851 m
->control_command
= m
->exec_command
+ id
;
855 log_debug("Unknown serialization key '%s'", key
);
860 static UnitActiveState
mount_active_state(Unit
*u
) {
863 return state_translation_table
[MOUNT(u
)->state
];
866 static const char *mount_sub_state_to_string(Unit
*u
) {
869 return mount_state_to_string(MOUNT(u
)->state
);
872 static bool mount_check_gc(Unit
*u
) {
877 return m
->from_etc_fstab
|| m
->from_proc_self_mountinfo
;
880 static void mount_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
887 success
= code
== CLD_EXITED
&& status
== 0;
888 m
->failure
= m
->failure
|| !success
;
890 assert(m
->control_pid
== pid
);
893 if (m
->control_command
) {
894 exec_status_fill(&m
->control_command
->exec_status
, pid
, code
, status
);
895 m
->control_command
= NULL
;
896 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
899 log_debug("%s control process exited, code=%s status=%i", u
->meta
.id
, sigchld_code_to_string(code
), status
);
901 /* Note that mount(8) returning and the kernel sending us a
902 * mount table change event might happen out-of-order. If an
903 * operation succeed we assume the kernel will follow soon too
904 * and already change into the resulting state. If it fails
905 * we check if the kernel still knows about the mount. and
906 * change state accordingly. */
911 case MOUNT_MOUNTING_DONE
:
912 case MOUNT_MOUNTING_SIGKILL
:
913 case MOUNT_MOUNTING_SIGTERM
:
914 case MOUNT_REMOUNTING
:
915 case MOUNT_REMOUNTING_SIGKILL
:
916 case MOUNT_REMOUNTING_SIGTERM
:
918 if (success
&& m
->from_proc_self_mountinfo
)
919 mount_enter_mounted(m
, true);
920 else if (m
->from_proc_self_mountinfo
)
921 mount_enter_mounted(m
, false);
923 mount_enter_dead(m
, false);
926 case MOUNT_UNMOUNTING
:
927 case MOUNT_UNMOUNTING_SIGKILL
:
928 case MOUNT_UNMOUNTING_SIGTERM
:
931 mount_enter_dead(m
, true);
932 else if (m
->from_proc_self_mountinfo
)
933 mount_enter_mounted(m
, false);
935 mount_enter_dead(m
, false);
939 assert_not_reached("Uh, control process died at wrong time.");
943 static void mount_timer_event(Unit
*u
, uint64_t elapsed
, Watch
*w
) {
947 assert(elapsed
== 1);
948 assert(w
== &m
->timer_watch
);
953 case MOUNT_MOUNTING_DONE
:
954 log_warning("%s mounting timed out. Stopping.", u
->meta
.id
);
955 mount_enter_signal(m
, MOUNT_MOUNTING_SIGTERM
, false);
958 case MOUNT_REMOUNTING
:
959 log_warning("%s remounting timed out. Stopping.", u
->meta
.id
);
960 mount_enter_signal(m
, MOUNT_REMOUNTING_SIGTERM
, false);
963 case MOUNT_UNMOUNTING
:
964 log_warning("%s unmounting timed out. Stopping.", u
->meta
.id
);
965 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGTERM
, false);
968 case MOUNT_MOUNTING_SIGTERM
:
969 log_warning("%s mounting timed out. Killing.", u
->meta
.id
);
970 mount_enter_signal(m
, MOUNT_MOUNTING_SIGKILL
, false);
973 case MOUNT_REMOUNTING_SIGTERM
:
974 log_warning("%s remounting timed out. Killing.", u
->meta
.id
);
975 mount_enter_signal(m
, MOUNT_REMOUNTING_SIGKILL
, false);
978 case MOUNT_UNMOUNTING_SIGTERM
:
979 log_warning("%s unmounting timed out. Killing.", u
->meta
.id
);
980 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGKILL
, false);
983 case MOUNT_MOUNTING_SIGKILL
:
984 case MOUNT_REMOUNTING_SIGKILL
:
985 case MOUNT_UNMOUNTING_SIGKILL
:
986 log_warning("%s mount process still around after SIGKILL. Ignoring.", u
->meta
.id
);
988 if (m
->from_proc_self_mountinfo
)
989 mount_enter_mounted(m
, false);
991 mount_enter_dead(m
, false);
995 assert_not_reached("Timeout at wrong time.");
999 static int mount_add_one(
1003 const char *options
,
1005 bool from_proc_self_mountinfo
,
1010 char *e
, *w
= NULL
, *o
= NULL
, *f
= NULL
;
1011 MountParameters
*mp
;
1019 assert(!set_flags
|| from_proc_self_mountinfo
);
1021 /* Ignore API mount points. They should never be referenced in
1022 * dependencies ever. */
1023 if (mount_point_is_api(where
))
1026 if (streq(fstype
, "autofs"))
1029 /* probably some kind of swap, which we don't cover for now */
1030 if (where
[0] != '/')
1033 if (!(e
= unit_name_from_path(where
, ".mount")))
1036 if (!(u
= manager_get_unit(m
, e
))) {
1039 if (!(u
= unit_new(m
))) {
1044 r
= unit_add_name(u
, e
);
1050 if (!(MOUNT(u
)->where
= strdup(where
))) {
1055 if ((r
= unit_set_description(u
, where
)) < 0)
1058 unit_add_to_load_queue(u
);
1064 if (!(w
= strdup(what
)) ||
1065 !(o
= strdup(options
)) ||
1066 !(f
= strdup(fstype
))) {
1071 if (from_proc_self_mountinfo
) {
1072 mp
= &MOUNT(u
)->parameters_proc_self_mountinfo
;
1075 MOUNT(u
)->is_mounted
= true;
1076 MOUNT(u
)->just_mounted
= !MOUNT(u
)->from_proc_self_mountinfo
;
1077 MOUNT(u
)->just_changed
= !streq_ptr(MOUNT(u
)->parameters_proc_self_mountinfo
.options
, o
);
1080 MOUNT(u
)->from_proc_self_mountinfo
= true;
1083 mp
= &MOUNT(u
)->parameters_etc_fstab
;
1085 MOUNT(u
)->from_etc_fstab
= true;
1097 unit_add_to_dbus_queue(u
);
1112 static char *fstab_node_to_udev_node(char *p
) {
1116 /* FIXME: to follow udev's logic 100% we need to leave valid
1117 * UTF8 chars unescaped */
1119 if (startswith(p
, "LABEL=")) {
1121 if (!(t
= xescape(p
+6, "/ ")))
1124 r
= asprintf(&dn
, "/dev/disk/by-label/%s", t
);
1133 if (startswith(p
, "UUID=")) {
1135 if (!(t
= xescape(p
+5, "/ ")))
1138 r
= asprintf(&dn
, "/dev/disk/by-uuid/%s", ascii_strlower(t
));
1150 static int mount_find_pri(char *options
) {
1154 if (!(pri
= mount_test_option(options
, "pri=")))
1160 r
= strtoul(pri
, &end
, 10);
1165 if (end
== pri
|| (*end
!= ',' && *end
!= 0))
1171 static int mount_load_etc_fstab(Manager
*m
) {
1179 if (!(f
= setmntent("/etc/fstab", "r")))
1182 while ((me
= getmntent(f
))) {
1185 if (!(what
= fstab_node_to_udev_node(me
->mnt_fsname
))) {
1190 if (!(where
= strdup(me
->mnt_dir
))) {
1197 path_kill_slashes(what
);
1199 if (where
[0] == '/')
1200 path_kill_slashes(where
);
1202 if (streq(me
->mnt_type
, "swap")) {
1205 if ((pri
= mount_find_pri(me
->mnt_opts
)) < 0)
1210 !!mount_test_option(me
->mnt_opts
, MNTOPT_NOAUTO
),
1214 r
= mount_add_one(m
, what
, where
, me
->mnt_opts
, me
->mnt_type
, false, false);
1230 static int mount_load_proc_self_mountinfo(Manager
*m
, bool set_flags
) {
1232 char *device
, *path
, *options
, *fstype
, *d
, *p
;
1236 rewind(m
->proc_self_mountinfo
);
1241 device
= path
= options
= fstype
= d
= p
= NULL
;
1243 if ((k
= fscanf(m
->proc_self_mountinfo
,
1244 "%*s " /* (1) mount id */
1245 "%*s " /* (2) parent id */
1246 "%*s " /* (3) major:minor */
1247 "%*s " /* (4) root */
1248 "%ms " /* (5) mount point */
1249 "%ms" /* (6) mount options */
1250 "%*[^-]" /* (7) optional fields */
1251 "- " /* (8) seperator */
1252 "%ms " /* (9) file system type */
1253 "%ms" /* (10) mount source */
1254 "%*[^\n]", /* some rubbish at the end */
1267 if (!(d
= cunescape(device
)) ||
1268 !(p
= cunescape(path
))) {
1273 if ((r
= mount_add_one(m
, d
, p
, options
, fstype
, true, set_flags
)) < 0)
1297 static void mount_shutdown(Manager
*m
) {
1300 if (m
->proc_self_mountinfo
) {
1301 fclose(m
->proc_self_mountinfo
);
1302 m
->proc_self_mountinfo
= NULL
;
1306 static int mount_enumerate(Manager
*m
) {
1308 struct epoll_event ev
;
1311 if (!m
->proc_self_mountinfo
) {
1312 if (!(m
->proc_self_mountinfo
= fopen("/proc/self/mountinfo", "re")))
1315 m
->mount_watch
.type
= WATCH_MOUNT
;
1316 m
->mount_watch
.fd
= fileno(m
->proc_self_mountinfo
);
1319 ev
.events
= EPOLLERR
;
1320 ev
.data
.ptr
= &m
->mount_watch
;
1322 if (epoll_ctl(m
->epoll_fd
, EPOLL_CTL_ADD
, m
->mount_watch
.fd
, &ev
) < 0)
1326 if ((r
= mount_load_etc_fstab(m
)) < 0)
1329 if ((r
= mount_load_proc_self_mountinfo(m
, false)) < 0)
1339 void mount_fd_event(Manager
*m
, int events
) {
1344 assert(events
== EPOLLERR
);
1346 /* The manager calls this for every fd event happening on the
1347 * /proc/self/mountinfo file, which informs us about mounting
1350 if ((r
= mount_load_proc_self_mountinfo(m
, true)) < 0) {
1351 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno
));
1353 /* Reset flags, just in case, for later calls */
1354 LIST_FOREACH(units_per_type
, meta
, m
->units_per_type
[UNIT_MOUNT
]) {
1355 Mount
*mount
= (Mount
*) meta
;
1357 mount
->is_mounted
= mount
->just_mounted
= mount
->just_changed
= false;
1363 manager_dispatch_load_queue(m
);
1365 LIST_FOREACH(units_per_type
, meta
, m
->units_per_type
[UNIT_MOUNT
]) {
1366 Mount
*mount
= (Mount
*) meta
;
1368 if (!mount
->is_mounted
) {
1369 /* This has just been unmounted. */
1371 mount
->from_proc_self_mountinfo
= false;
1373 switch (mount
->state
) {
1376 mount_enter_dead(mount
, true);
1380 mount_set_state(mount
, mount
->state
);
1385 } else if (mount
->just_mounted
|| mount
->just_changed
) {
1387 /* New or changed entrymount */
1389 switch (mount
->state
) {
1392 case MOUNT_MAINTAINANCE
:
1393 mount_enter_mounted(mount
, true);
1396 case MOUNT_MOUNTING
:
1397 mount_enter_mounting_done(mount
);
1401 /* Nothing really changed, but let's
1402 * issue an notification call
1403 * nonetheless, in case somebody is
1404 * waiting for this. (e.g. file system
1405 * ro/rw remounts.) */
1406 mount_set_state(mount
, mount
->state
);
1411 /* Reset the flags for later calls */
1412 mount
->is_mounted
= mount
->just_mounted
= mount
->just_changed
= false;
1416 int mount_path_is_mounted(Manager
*m
, const char* path
) {
1426 if (!(t
= strdup(path
)))
1429 path_kill_slashes(t
);
1435 if (!(e
= unit_name_from_path(t
, ".mount"))) {
1440 u
= manager_get_unit(m
, e
);
1444 (MOUNT(u
)->from_etc_fstab
|| MOUNT(u
)->from_fragment
) &&
1445 MOUNT(u
)->state
!= MOUNT_MOUNTED
) {
1450 assert_se(slash
= strrchr(t
, '/'));
1467 static const char* const mount_state_table
[_MOUNT_STATE_MAX
] = {
1468 [MOUNT_DEAD
] = "dead",
1469 [MOUNT_MOUNTING
] = "mounting",
1470 [MOUNT_MOUNTING_DONE
] = "mounting-done",
1471 [MOUNT_MOUNTED
] = "mounted",
1472 [MOUNT_REMOUNTING
] = "remounting",
1473 [MOUNT_UNMOUNTING
] = "unmounting",
1474 [MOUNT_MOUNTING_SIGTERM
] = "mounting-sigterm",
1475 [MOUNT_MOUNTING_SIGKILL
] = "mounting-sigkill",
1476 [MOUNT_REMOUNTING_SIGTERM
] = "remounting-sigterm",
1477 [MOUNT_REMOUNTING_SIGKILL
] = "remounting-sigkill",
1478 [MOUNT_UNMOUNTING_SIGTERM
] = "unmounting-sigterm",
1479 [MOUNT_UNMOUNTING_SIGKILL
] = "unmounting-sigkill",
1480 [MOUNT_MAINTAINANCE
] = "maintainance"
1483 DEFINE_STRING_TABLE_LOOKUP(mount_state
, MountState
);
1485 static const char* const mount_exec_command_table
[_MOUNT_EXEC_COMMAND_MAX
] = {
1486 [MOUNT_EXEC_MOUNT
] = "ExecMount",
1487 [MOUNT_EXEC_UNMOUNT
] = "ExecUnmount",
1488 [MOUNT_EXEC_REMOUNT
] = "ExecRemount",
1491 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command
, MountExecCommand
);
1493 const UnitVTable mount_vtable
= {
1497 .no_instances
= true,
1504 .coldplug
= mount_coldplug
,
1508 .start
= mount_start
,
1510 .reload
= mount_reload
,
1512 .serialize
= mount_serialize
,
1513 .deserialize_item
= mount_deserialize_item
,
1515 .active_state
= mount_active_state
,
1516 .sub_state_to_string
= mount_sub_state_to_string
,
1518 .check_gc
= mount_check_gc
,
1520 .sigchld_event
= mount_sigchld_event
,
1521 .timer_event
= mount_timer_event
,
1523 .bus_message_handler
= bus_mount_message_handler
,
1525 .enumerate
= mount_enumerate
,
1526 .shutdown
= mount_shutdown