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
,
495 UNIT(m
)->meta
.manager
->confirm_spawn
,
496 UNIT(m
)->meta
.cgroup_bondings
,
500 if ((r
= unit_watch_pid(UNIT(m
), pid
)) < 0)
501 /* FIXME: we need to do something here */
509 unit_unwatch_timer(UNIT(m
), &m
->timer_watch
);
514 static void mount_enter_dead(Mount
*m
, bool success
) {
520 mount_set_state(m
, m
->failure
? MOUNT_MAINTAINANCE
: MOUNT_DEAD
);
523 static void mount_enter_mounted(Mount
*m
, bool success
) {
529 mount_set_state(m
, MOUNT_MOUNTED
);
532 static void mount_enter_signal(Mount
*m
, MountState state
, bool success
) {
541 if (m
->kill_mode
!= KILL_NONE
) {
542 int sig
= (state
== MOUNT_MOUNTING_SIGTERM
||
543 state
== MOUNT_UNMOUNTING_SIGTERM
||
544 state
== MOUNT_REMOUNTING_SIGTERM
) ? SIGTERM
: SIGKILL
;
546 if (m
->kill_mode
== KILL_CONTROL_GROUP
) {
548 if ((r
= cgroup_bonding_kill_list(UNIT(m
)->meta
.cgroup_bondings
, sig
)) < 0) {
549 if (r
!= -EAGAIN
&& r
!= -ESRCH
)
555 if (!sent
&& m
->control_pid
> 0)
556 if (kill(m
->kill_mode
== KILL_PROCESS
? m
->control_pid
: -m
->control_pid
, sig
) < 0 && errno
!= ESRCH
) {
563 if ((r
= unit_watch_timer(UNIT(m
), m
->timeout_usec
, &m
->timer_watch
)) < 0)
566 mount_set_state(m
, state
);
567 } else if (state
== MOUNT_REMOUNTING_SIGTERM
|| state
== MOUNT_REMOUNTING_SIGKILL
)
568 mount_enter_mounted(m
, true);
570 mount_enter_dead(m
, true);
575 log_warning("%s failed to kill processes: %s", UNIT(m
)->meta
.id
, strerror(-r
));
577 if (state
== MOUNT_REMOUNTING_SIGTERM
|| state
== MOUNT_REMOUNTING_SIGKILL
)
578 mount_enter_mounted(m
, false);
580 mount_enter_dead(m
, false);
583 static void mount_enter_unmounting(Mount
*m
, bool success
) {
591 m
->control_command_id
= MOUNT_EXEC_UNMOUNT
;
592 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_UNMOUNT
;
594 if ((r
= exec_command_set(
601 mount_unwatch_control_pid(m
);
603 if ((r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
)) < 0)
606 mount_set_state(m
, MOUNT_UNMOUNTING
);
611 log_warning("%s failed to run umount exectuable: %s", UNIT(m
)->meta
.id
, strerror(-r
));
612 mount_enter_mounted(m
, false);
615 static void mount_enter_mounting(Mount
*m
) {
620 m
->control_command_id
= MOUNT_EXEC_MOUNT
;
621 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_MOUNT
;
623 if (m
->from_fragment
)
624 r
= exec_command_set(
627 m
->parameters_fragment
.what
,
629 "-t", m
->parameters_fragment
.fstype
,
630 m
->parameters_fragment
.options
? "-o" : NULL
, m
->parameters_fragment
.options
,
632 else if (m
->from_etc_fstab
)
633 r
= exec_command_set(
644 mount_unwatch_control_pid(m
);
646 if ((r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
)) < 0)
649 mount_set_state(m
, MOUNT_MOUNTING
);
654 log_warning("%s failed to run mount exectuable: %s", UNIT(m
)->meta
.id
, strerror(-r
));
655 mount_enter_dead(m
, false);
658 static void mount_enter_mounting_done(Mount
*m
) {
661 mount_set_state(m
, MOUNT_MOUNTING_DONE
);
664 static void mount_enter_remounting(Mount
*m
, bool success
) {
672 m
->control_command_id
= MOUNT_EXEC_REMOUNT
;
673 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_REMOUNT
;
675 if (m
->from_fragment
) {
679 if (m
->parameters_fragment
.options
) {
680 if (!(buf
= strappend("remount,", m
->parameters_fragment
.options
))) {
689 r
= exec_command_set(
692 m
->parameters_fragment
.what
,
694 "-t", m
->parameters_fragment
.fstype
,
699 } else if (m
->from_etc_fstab
)
700 r
= exec_command_set(
714 mount_unwatch_control_pid(m
);
716 if ((r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
)) < 0)
719 mount_set_state(m
, MOUNT_REMOUNTING
);
724 mount_enter_mounted(m
, false);
727 static int mount_start(Unit
*u
) {
732 /* We cannot fulfill this request right now, try again later
734 if (m
->state
== MOUNT_UNMOUNTING
||
735 m
->state
== MOUNT_UNMOUNTING_SIGTERM
||
736 m
->state
== MOUNT_UNMOUNTING_SIGKILL
)
740 if (m
->state
== MOUNT_MOUNTING
||
741 m
->state
== MOUNT_MOUNTING_SIGTERM
||
742 m
->state
== MOUNT_MOUNTING_SIGKILL
)
745 assert(m
->state
== MOUNT_DEAD
|| m
->state
== MOUNT_MAINTAINANCE
);
748 mount_enter_mounting(m
);
752 static int mount_stop(Unit
*u
) {
757 /* Cann't do this right now. */
758 if (m
->state
== MOUNT_MOUNTING
||
759 m
->state
== MOUNT_MOUNTING_DONE
||
760 m
->state
== MOUNT_MOUNTING_SIGTERM
||
761 m
->state
== MOUNT_MOUNTING_SIGKILL
||
762 m
->state
== MOUNT_REMOUNTING
||
763 m
->state
== MOUNT_REMOUNTING_SIGTERM
||
764 m
->state
== MOUNT_REMOUNTING_SIGKILL
)
768 if (m
->state
== MOUNT_UNMOUNTING
||
769 m
->state
== MOUNT_UNMOUNTING_SIGKILL
||
770 m
->state
== MOUNT_UNMOUNTING_SIGTERM
)
773 assert(m
->state
== MOUNT_MOUNTED
);
775 mount_enter_unmounting(m
, true);
779 static int mount_reload(Unit
*u
) {
784 if (m
->state
== MOUNT_MOUNTING_DONE
)
787 assert(m
->state
== MOUNT_MOUNTED
);
789 mount_enter_remounting(m
, true);
793 static int mount_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
800 unit_serialize_item(u
, f
, "state", mount_state_to_string(m
->state
));
801 unit_serialize_item(u
, f
, "failure", yes_no(m
->failure
));
803 if (m
->control_pid
> 0)
804 unit_serialize_item_format(u
, f
, "control-pid", "%u", (unsigned) m
->control_pid
);
806 if (m
->control_command_id
>= 0)
807 unit_serialize_item(u
, f
, "control-command", mount_exec_command_to_string(m
->control_command_id
));
812 static int mount_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
821 if (streq(key
, "state")) {
824 if ((state
= mount_state_from_string(value
)) < 0)
825 log_debug("Failed to parse state value %s", value
);
827 m
->deserialized_state
= state
;
828 } else if (streq(key
, "failure")) {
831 if ((b
= parse_boolean(value
)) < 0)
832 log_debug("Failed to parse failure value %s", value
);
834 m
->failure
= b
|| m
->failure
;
836 } else if (streq(key
, "control-pid")) {
839 if ((r
= safe_atou(value
, &pid
)) < 0 || pid
<= 0)
840 log_debug("Failed to parse control-pid value %s", value
);
842 m
->control_pid
= (pid_t
) pid
;
843 } else if (streq(key
, "control-command")) {
846 if ((id
= mount_exec_command_from_string(value
)) < 0)
847 log_debug("Failed to parse exec-command value %s", value
);
849 m
->control_command_id
= id
;
850 m
->control_command
= m
->exec_command
+ id
;
854 log_debug("Unknown serialization key '%s'", key
);
859 static UnitActiveState
mount_active_state(Unit
*u
) {
862 return state_translation_table
[MOUNT(u
)->state
];
865 static const char *mount_sub_state_to_string(Unit
*u
) {
868 return mount_state_to_string(MOUNT(u
)->state
);
871 static bool mount_check_gc(Unit
*u
) {
876 return m
->from_etc_fstab
|| m
->from_proc_self_mountinfo
;
879 static void mount_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
886 success
= code
== CLD_EXITED
&& status
== 0;
887 m
->failure
= m
->failure
|| !success
;
889 assert(m
->control_pid
== pid
);
892 if (m
->control_command
) {
893 exec_status_fill(&m
->control_command
->exec_status
, pid
, code
, status
);
894 m
->control_command
= NULL
;
895 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
898 log_debug("%s control process exited, code=%s status=%i", u
->meta
.id
, sigchld_code_to_string(code
), status
);
900 /* Note that mount(8) returning and the kernel sending us a
901 * mount table change event might happen out-of-order. If an
902 * operation succeed we assume the kernel will follow soon too
903 * and already change into the resulting state. If it fails
904 * we check if the kernel still knows about the mount. and
905 * change state accordingly. */
910 case MOUNT_MOUNTING_DONE
:
911 case MOUNT_MOUNTING_SIGKILL
:
912 case MOUNT_MOUNTING_SIGTERM
:
913 case MOUNT_REMOUNTING
:
914 case MOUNT_REMOUNTING_SIGKILL
:
915 case MOUNT_REMOUNTING_SIGTERM
:
917 if (success
&& m
->from_proc_self_mountinfo
)
918 mount_enter_mounted(m
, true);
919 else if (m
->from_proc_self_mountinfo
)
920 mount_enter_mounted(m
, false);
922 mount_enter_dead(m
, false);
925 case MOUNT_UNMOUNTING
:
926 case MOUNT_UNMOUNTING_SIGKILL
:
927 case MOUNT_UNMOUNTING_SIGTERM
:
930 mount_enter_dead(m
, true);
931 else if (m
->from_proc_self_mountinfo
)
932 mount_enter_mounted(m
, false);
934 mount_enter_dead(m
, false);
938 assert_not_reached("Uh, control process died at wrong time.");
942 static void mount_timer_event(Unit
*u
, uint64_t elapsed
, Watch
*w
) {
946 assert(elapsed
== 1);
947 assert(w
== &m
->timer_watch
);
952 case MOUNT_MOUNTING_DONE
:
953 log_warning("%s mounting timed out. Stopping.", u
->meta
.id
);
954 mount_enter_signal(m
, MOUNT_MOUNTING_SIGTERM
, false);
957 case MOUNT_REMOUNTING
:
958 log_warning("%s remounting timed out. Stopping.", u
->meta
.id
);
959 mount_enter_signal(m
, MOUNT_REMOUNTING_SIGTERM
, false);
962 case MOUNT_UNMOUNTING
:
963 log_warning("%s unmounting timed out. Stopping.", u
->meta
.id
);
964 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGTERM
, false);
967 case MOUNT_MOUNTING_SIGTERM
:
968 log_warning("%s mounting timed out. Killing.", u
->meta
.id
);
969 mount_enter_signal(m
, MOUNT_MOUNTING_SIGKILL
, false);
972 case MOUNT_REMOUNTING_SIGTERM
:
973 log_warning("%s remounting timed out. Killing.", u
->meta
.id
);
974 mount_enter_signal(m
, MOUNT_REMOUNTING_SIGKILL
, false);
977 case MOUNT_UNMOUNTING_SIGTERM
:
978 log_warning("%s unmounting timed out. Killing.", u
->meta
.id
);
979 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGKILL
, false);
982 case MOUNT_MOUNTING_SIGKILL
:
983 case MOUNT_REMOUNTING_SIGKILL
:
984 case MOUNT_UNMOUNTING_SIGKILL
:
985 log_warning("%s mount process still around after SIGKILL. Ignoring.", u
->meta
.id
);
987 if (m
->from_proc_self_mountinfo
)
988 mount_enter_mounted(m
, false);
990 mount_enter_dead(m
, false);
994 assert_not_reached("Timeout at wrong time.");
998 static int mount_add_one(
1002 const char *options
,
1004 bool from_proc_self_mountinfo
,
1009 char *e
, *w
= NULL
, *o
= NULL
, *f
= NULL
;
1010 MountParameters
*mp
;
1018 assert(!set_flags
|| from_proc_self_mountinfo
);
1020 /* Ignore API mount points. They should never be referenced in
1021 * dependencies ever. */
1022 if (mount_point_is_api(where
))
1025 if (streq(fstype
, "autofs"))
1028 /* probably some kind of swap, which we don't cover for now */
1029 if (where
[0] != '/')
1032 if (!(e
= unit_name_from_path(where
, ".mount")))
1035 if (!(u
= manager_get_unit(m
, e
))) {
1038 if (!(u
= unit_new(m
))) {
1043 r
= unit_add_name(u
, e
);
1049 if (!(MOUNT(u
)->where
= strdup(where
))) {
1054 if ((r
= unit_set_description(u
, where
)) < 0)
1057 unit_add_to_load_queue(u
);
1063 if (!(w
= strdup(what
)) ||
1064 !(o
= strdup(options
)) ||
1065 !(f
= strdup(fstype
))) {
1070 if (from_proc_self_mountinfo
) {
1071 mp
= &MOUNT(u
)->parameters_proc_self_mountinfo
;
1074 MOUNT(u
)->is_mounted
= true;
1075 MOUNT(u
)->just_mounted
= !MOUNT(u
)->from_proc_self_mountinfo
;
1076 MOUNT(u
)->just_changed
= !streq_ptr(MOUNT(u
)->parameters_proc_self_mountinfo
.options
, o
);
1079 MOUNT(u
)->from_proc_self_mountinfo
= true;
1082 mp
= &MOUNT(u
)->parameters_etc_fstab
;
1084 MOUNT(u
)->from_etc_fstab
= true;
1096 unit_add_to_dbus_queue(u
);
1111 static char *fstab_node_to_udev_node(char *p
) {
1115 /* FIXME: to follow udev's logic 100% we need to leave valid
1116 * UTF8 chars unescaped */
1118 if (startswith(p
, "LABEL=")) {
1120 if (!(t
= xescape(p
+6, "/ ")))
1123 r
= asprintf(&dn
, "/dev/disk/by-label/%s", t
);
1132 if (startswith(p
, "UUID=")) {
1134 if (!(t
= xescape(p
+5, "/ ")))
1137 r
= asprintf(&dn
, "/dev/disk/by-uuid/%s", ascii_strlower(t
));
1149 static int mount_find_pri(char *options
) {
1153 if (!(pri
= mount_test_option(options
, "pri=")))
1159 r
= strtoul(pri
, &end
, 10);
1164 if (end
== pri
|| (*end
!= ',' && *end
!= 0))
1170 static int mount_load_etc_fstab(Manager
*m
) {
1178 if (!(f
= setmntent("/etc/fstab", "r")))
1181 while ((me
= getmntent(f
))) {
1184 if (!(what
= fstab_node_to_udev_node(me
->mnt_fsname
))) {
1189 if (!(where
= strdup(me
->mnt_dir
))) {
1196 path_kill_slashes(what
);
1198 if (where
[0] == '/')
1199 path_kill_slashes(where
);
1201 if (streq(me
->mnt_type
, "swap")) {
1204 if ((pri
= mount_find_pri(me
->mnt_opts
)) < 0)
1209 !!mount_test_option(me
->mnt_opts
, MNTOPT_NOAUTO
),
1213 r
= mount_add_one(m
, what
, where
, me
->mnt_opts
, me
->mnt_type
, false, false);
1229 static int mount_load_proc_self_mountinfo(Manager
*m
, bool set_flags
) {
1231 char *device
, *path
, *options
, *fstype
, *d
, *p
;
1235 rewind(m
->proc_self_mountinfo
);
1240 device
= path
= options
= fstype
= d
= p
= NULL
;
1242 if ((k
= fscanf(m
->proc_self_mountinfo
,
1243 "%*s " /* (1) mount id */
1244 "%*s " /* (2) parent id */
1245 "%*s " /* (3) major:minor */
1246 "%*s " /* (4) root */
1247 "%ms " /* (5) mount point */
1248 "%ms" /* (6) mount options */
1249 "%*[^-]" /* (7) optional fields */
1250 "- " /* (8) seperator */
1251 "%ms " /* (9) file system type */
1252 "%ms" /* (10) mount source */
1253 "%*[^\n]", /* some rubbish at the end */
1266 if (!(d
= cunescape(device
)) ||
1267 !(p
= cunescape(path
))) {
1272 if ((r
= mount_add_one(m
, d
, p
, options
, fstype
, true, set_flags
)) < 0)
1296 static void mount_shutdown(Manager
*m
) {
1299 if (m
->proc_self_mountinfo
) {
1300 fclose(m
->proc_self_mountinfo
);
1301 m
->proc_self_mountinfo
= NULL
;
1305 static int mount_enumerate(Manager
*m
) {
1307 struct epoll_event ev
;
1310 if (!m
->proc_self_mountinfo
) {
1311 if (!(m
->proc_self_mountinfo
= fopen("/proc/self/mountinfo", "re")))
1314 m
->mount_watch
.type
= WATCH_MOUNT
;
1315 m
->mount_watch
.fd
= fileno(m
->proc_self_mountinfo
);
1318 ev
.events
= EPOLLERR
;
1319 ev
.data
.ptr
= &m
->mount_watch
;
1321 if (epoll_ctl(m
->epoll_fd
, EPOLL_CTL_ADD
, m
->mount_watch
.fd
, &ev
) < 0)
1325 if ((r
= mount_load_etc_fstab(m
)) < 0)
1328 if ((r
= mount_load_proc_self_mountinfo(m
, false)) < 0)
1338 void mount_fd_event(Manager
*m
, int events
) {
1343 assert(events
== EPOLLERR
);
1345 /* The manager calls this for every fd event happening on the
1346 * /proc/self/mountinfo file, which informs us about mounting
1349 if ((r
= mount_load_proc_self_mountinfo(m
, true)) < 0) {
1350 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno
));
1352 /* Reset flags, just in case, for later calls */
1353 LIST_FOREACH(units_per_type
, meta
, m
->units_per_type
[UNIT_MOUNT
]) {
1354 Mount
*mount
= (Mount
*) meta
;
1356 mount
->is_mounted
= mount
->just_mounted
= mount
->just_changed
= false;
1362 manager_dispatch_load_queue(m
);
1364 LIST_FOREACH(units_per_type
, meta
, m
->units_per_type
[UNIT_MOUNT
]) {
1365 Mount
*mount
= (Mount
*) meta
;
1367 if (!mount
->is_mounted
) {
1368 /* This has just been unmounted. */
1370 mount
->from_proc_self_mountinfo
= false;
1372 switch (mount
->state
) {
1375 mount_enter_dead(mount
, true);
1379 mount_set_state(mount
, mount
->state
);
1384 } else if (mount
->just_mounted
|| mount
->just_changed
) {
1386 /* New or changed entrymount */
1388 switch (mount
->state
) {
1391 case MOUNT_MAINTAINANCE
:
1392 mount_enter_mounted(mount
, true);
1395 case MOUNT_MOUNTING
:
1396 mount_enter_mounting_done(mount
);
1400 /* Nothing really changed, but let's
1401 * issue an notification call
1402 * nonetheless, in case somebody is
1403 * waiting for this. (e.g. file system
1404 * ro/rw remounts.) */
1405 mount_set_state(mount
, mount
->state
);
1410 /* Reset the flags for later calls */
1411 mount
->is_mounted
= mount
->just_mounted
= mount
->just_changed
= false;
1415 int mount_path_is_mounted(Manager
*m
, const char* path
) {
1425 if (!(t
= strdup(path
)))
1428 path_kill_slashes(t
);
1434 if (!(e
= unit_name_from_path(t
, ".mount"))) {
1439 u
= manager_get_unit(m
, e
);
1443 (MOUNT(u
)->from_etc_fstab
|| MOUNT(u
)->from_fragment
) &&
1444 MOUNT(u
)->state
!= MOUNT_MOUNTED
) {
1449 assert_se(slash
= strrchr(t
, '/'));
1466 static const char* const mount_state_table
[_MOUNT_STATE_MAX
] = {
1467 [MOUNT_DEAD
] = "dead",
1468 [MOUNT_MOUNTING
] = "mounting",
1469 [MOUNT_MOUNTING_DONE
] = "mounting-done",
1470 [MOUNT_MOUNTED
] = "mounted",
1471 [MOUNT_REMOUNTING
] = "remounting",
1472 [MOUNT_UNMOUNTING
] = "unmounting",
1473 [MOUNT_MOUNTING_SIGTERM
] = "mounting-sigterm",
1474 [MOUNT_MOUNTING_SIGKILL
] = "mounting-sigkill",
1475 [MOUNT_REMOUNTING_SIGTERM
] = "remounting-sigterm",
1476 [MOUNT_REMOUNTING_SIGKILL
] = "remounting-sigkill",
1477 [MOUNT_UNMOUNTING_SIGTERM
] = "unmounting-sigterm",
1478 [MOUNT_UNMOUNTING_SIGKILL
] = "unmounting-sigkill",
1479 [MOUNT_MAINTAINANCE
] = "maintainance"
1482 DEFINE_STRING_TABLE_LOOKUP(mount_state
, MountState
);
1484 static const char* const mount_exec_command_table
[_MOUNT_EXEC_COMMAND_MAX
] = {
1485 [MOUNT_EXEC_MOUNT
] = "ExecMount",
1486 [MOUNT_EXEC_UNMOUNT
] = "ExecUnmount",
1487 [MOUNT_EXEC_REMOUNT
] = "ExecRemount",
1490 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command
, MountExecCommand
);
1492 const UnitVTable mount_vtable
= {
1496 .no_instances
= true,
1503 .coldplug
= mount_coldplug
,
1507 .start
= mount_start
,
1509 .reload
= mount_reload
,
1511 .serialize
= mount_serialize
,
1512 .deserialize_item
= mount_deserialize_item
,
1514 .active_state
= mount_active_state
,
1515 .sub_state_to_string
= mount_sub_state_to_string
,
1517 .check_gc
= mount_check_gc
,
1519 .sigchld_event
= mount_sigchld_event
,
1520 .timer_event
= mount_timer_event
,
1522 .bus_message_handler
= bus_mount_message_handler
,
1524 .enumerate
= mount_enumerate
,
1525 .shutdown
= mount_shutdown