1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU 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"
36 #include "dbus-mount.h"
38 #include "bus-errors.h"
39 #include "exit-status.h"
42 static const UnitActiveState state_translation_table
[_MOUNT_STATE_MAX
] = {
43 [MOUNT_DEAD
] = UNIT_INACTIVE
,
44 [MOUNT_MOUNTING
] = UNIT_ACTIVATING
,
45 [MOUNT_MOUNTING_DONE
] = UNIT_ACTIVE
,
46 [MOUNT_MOUNTED
] = UNIT_ACTIVE
,
47 [MOUNT_REMOUNTING
] = UNIT_RELOADING
,
48 [MOUNT_UNMOUNTING
] = UNIT_DEACTIVATING
,
49 [MOUNT_MOUNTING_SIGTERM
] = UNIT_DEACTIVATING
,
50 [MOUNT_MOUNTING_SIGKILL
] = UNIT_DEACTIVATING
,
51 [MOUNT_REMOUNTING_SIGTERM
] = UNIT_RELOADING
,
52 [MOUNT_REMOUNTING_SIGKILL
] = UNIT_RELOADING
,
53 [MOUNT_UNMOUNTING_SIGTERM
] = UNIT_DEACTIVATING
,
54 [MOUNT_UNMOUNTING_SIGKILL
] = UNIT_DEACTIVATING
,
55 [MOUNT_FAILED
] = UNIT_FAILED
58 static void mount_init(Unit
*u
) {
62 assert(u
->meta
.load_state
== UNIT_STUB
);
64 m
->timeout_usec
= DEFAULT_TIMEOUT_USEC
;
65 m
->directory_mode
= 0755;
67 exec_context_init(&m
->exec_context
);
68 m
->exec_context
.std_output
= EXEC_OUTPUT_KMSG
;
70 /* We need to make sure that /bin/mount is always called in
71 * the same process group as us, so that the autofs kernel
72 * side doesn't send us another mount request while we are
73 * already trying to comply its last one. */
74 m
->exec_context
.same_pgrp
= true;
76 m
->timer_watch
.type
= WATCH_INVALID
;
78 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
81 static void mount_unwatch_control_pid(Mount
*m
) {
84 if (m
->control_pid
<= 0)
87 unit_unwatch_pid(UNIT(m
), m
->control_pid
);
91 static void mount_parameters_done(MountParameters
*p
) {
98 p
->what
= p
->options
= p
->fstype
= NULL
;
101 static void mount_done(Unit
*u
) {
110 /* Try to detach us from the automount unit if there is any */
111 LIST_FOREACH(units_per_type
, other
, m
->meta
.manager
->units_per_type
[UNIT_AUTOMOUNT
]) {
112 Automount
*a
= (Automount
*) other
;
118 mount_parameters_done(&m
->parameters_etc_fstab
);
119 mount_parameters_done(&m
->parameters_proc_self_mountinfo
);
120 mount_parameters_done(&m
->parameters_fragment
);
122 exec_context_done(&m
->exec_context
);
123 exec_command_done_array(m
->exec_command
, _MOUNT_EXEC_COMMAND_MAX
);
124 m
->control_command
= NULL
;
126 mount_unwatch_control_pid(m
);
128 unit_unwatch_timer(u
, &m
->timer_watch
);
131 static int mount_add_mount_links(Mount
*m
) {
138 if (m
->from_fragment
)
139 pm
= &m
->parameters_fragment
;
140 else if (m
->from_etc_fstab
)
141 pm
= &m
->parameters_etc_fstab
;
145 /* Adds in links to other mount points that might lie below or
146 * above us in the hierarchy */
148 LIST_FOREACH(units_per_type
, other
, m
->meta
.manager
->units_per_type
[UNIT_MOUNT
]) {
149 Mount
*n
= (Mount
*) other
;
155 if (n
->meta
.load_state
!= UNIT_LOADED
)
158 if (n
->from_fragment
)
159 pn
= &n
->parameters_fragment
;
160 else if (n
->from_etc_fstab
)
161 pn
= &n
->parameters_etc_fstab
;
165 if (path_startswith(m
->where
, n
->where
)) {
167 if ((r
= unit_add_dependency(UNIT(m
), UNIT_AFTER
, UNIT(n
), true)) < 0)
170 if (n
->from_etc_fstab
|| n
->from_fragment
)
171 if ((r
= unit_add_dependency(UNIT(m
), UNIT_REQUIRES
, UNIT(n
), true)) < 0)
174 } else if (path_startswith(n
->where
, m
->where
)) {
176 if ((r
= unit_add_dependency(UNIT(n
), UNIT_AFTER
, UNIT(m
), true)) < 0)
179 if (m
->from_etc_fstab
|| m
->from_fragment
)
180 if ((r
= unit_add_dependency(UNIT(n
), UNIT_REQUIRES
, UNIT(m
), true)) < 0)
183 } else if (pm
&& path_startswith(pm
->what
, n
->where
)) {
185 if ((r
= unit_add_dependency(UNIT(m
), UNIT_AFTER
, UNIT(n
), true)) < 0)
188 if (m
->from_etc_fstab
|| m
->from_fragment
)
189 if ((r
= unit_add_dependency(UNIT(m
), UNIT_REQUIRES
, UNIT(n
), true)) < 0)
192 } else if (pn
&& path_startswith(pn
->what
, m
->where
)) {
194 if ((r
= unit_add_dependency(UNIT(n
), UNIT_AFTER
, UNIT(m
), true)) < 0)
197 if (n
->from_etc_fstab
|| n
->from_fragment
)
198 if ((r
= unit_add_dependency(UNIT(n
), UNIT_REQUIRES
, UNIT(m
), true)) < 0)
206 static int mount_add_swap_links(Mount
*m
) {
212 LIST_FOREACH(units_per_type
, other
, m
->meta
.manager
->units_per_type
[UNIT_SWAP
])
213 if ((r
= swap_add_one_mount_link((Swap
*) other
, m
)) < 0)
219 static int mount_add_path_links(Mount
*m
) {
225 LIST_FOREACH(units_per_type
, other
, m
->meta
.manager
->units_per_type
[UNIT_PATH
])
226 if ((r
= path_add_one_mount_link((Path
*) other
, m
)) < 0)
232 static int mount_add_automount_links(Mount
*m
) {
238 LIST_FOREACH(units_per_type
, other
, m
->meta
.manager
->units_per_type
[UNIT_AUTOMOUNT
])
239 if ((r
= automount_add_one_mount_link((Automount
*) other
, m
)) < 0)
245 static int mount_add_socket_links(Mount
*m
) {
251 LIST_FOREACH(units_per_type
, other
, m
->meta
.manager
->units_per_type
[UNIT_SOCKET
])
252 if ((r
= socket_add_one_mount_link((Socket
*) other
, m
)) < 0)
258 static char* mount_test_option(const char *haystack
, const char *needle
) {
263 /* Like glibc's hasmntopt(), but works on a string, not a
270 me
.mnt_opts
= (char*) haystack
;
272 return hasmntopt(&me
, needle
);
275 static int mount_add_target_links(Mount
*m
) {
276 const char *target
, *after
= NULL
;
280 bool noauto
, nofail
, handle
, automount
;
284 if (m
->from_fragment
)
285 p
= &m
->parameters_fragment
;
286 else if (m
->from_etc_fstab
)
287 p
= &m
->parameters_etc_fstab
;
291 noauto
= !!mount_test_option(p
->options
, MNTOPT_NOAUTO
);
292 nofail
= !!mount_test_option(p
->options
, "nofail");
294 mount_test_option(p
->options
, "comment=systemd.mount") ||
295 mount_test_option(p
->options
, "x-systemd-mount") ||
296 m
->meta
.manager
->mount_auto
;
298 mount_test_option(p
->options
, "comment=systemd.automount") ||
299 mount_test_option(p
->options
, "x-systemd-automount");
301 if (mount_test_option(p
->options
, "_netdev") ||
302 (p
->fstype
&& fstype_is_network(p
->fstype
))) {
303 target
= SPECIAL_REMOTE_FS_TARGET
;
305 if (m
->meta
.manager
->running_as
== MANAGER_SYSTEM
)
306 after
= SPECIAL_NETWORK_TARGET
;
308 target
= SPECIAL_LOCAL_FS_TARGET
;
310 if ((r
= manager_load_unit(m
->meta
.manager
, target
, NULL
, NULL
, &tu
)) < 0)
314 if ((r
= unit_add_dependency_by_name(UNIT(m
), UNIT_AFTER
, after
, NULL
, true)) < 0)
317 if (automount
&& m
->meta
.manager
->running_as
== MANAGER_SYSTEM
) {
320 if ((r
= unit_load_related_unit(UNIT(m
), ".automount", &am
)) < 0)
323 return unit_add_two_dependencies(tu
, UNIT_AFTER
, UNIT_WANTS
, UNIT(am
), true);
326 /* Automatically add mount points that aren't natively
327 * configured to local-fs.target */
332 m
->meta
.manager
->running_as
== MANAGER_SYSTEM
)
333 if ((r
= unit_add_dependency(tu
, UNIT_WANTS
, UNIT(m
), true)) < 0)
336 return unit_add_dependency(UNIT(m
), UNIT_BEFORE
, tu
, true);
340 static bool mount_is_bind(MountParameters
*p
) {
343 if (p
->fstype
&& streq(p
->fstype
, "bind"))
346 if (mount_test_option(p
->options
, "bind"))
352 static int mount_add_device_links(Mount
*m
) {
358 if (m
->from_fragment
)
359 p
= &m
->parameters_fragment
;
360 else if (m
->from_etc_fstab
)
361 p
= &m
->parameters_etc_fstab
;
368 if (!mount_is_bind(p
) && !path_equal(m
->where
, "/")) {
371 noauto
= !!mount_test_option(p
->options
, MNTOPT_NOAUTO
);
372 nofail
= !!mount_test_option(p
->options
, "nofail");
374 if ((r
= unit_add_node_link(UNIT(m
), p
->what
,
376 UNIT(m
)->meta
.manager
->running_as
== MANAGER_SYSTEM
)) < 0)
382 UNIT(m
)->meta
.manager
->running_as
== MANAGER_SYSTEM
&&
383 !path_equal(m
->where
, "/")) {
386 /* Let's add in the fsck service */
388 /* aka SPECIAL_FSCK_SERVICE */
389 if (!(name
= unit_name_from_path_instance("fsck", p
->what
, ".service")))
392 if ((r
= manager_load_unit_prepare(m
->meta
.manager
, name
, NULL
, NULL
, &fsck
)) < 0) {
393 log_warning("Failed to prepare unit %s: %s", name
, strerror(-r
));
400 SERVICE(fsck
)->fsck_passno
= p
->passno
;
402 if ((r
= unit_add_two_dependencies(UNIT(m
), UNIT_AFTER
, UNIT_REQUIRES
, fsck
, true)) < 0)
409 static int mount_add_default_dependencies(Mount
*m
) {
414 if (m
->meta
.manager
->running_as
== MANAGER_SYSTEM
&&
415 !path_equal(m
->where
, "/")) {
418 if (m
->from_fragment
)
419 p
= &m
->parameters_fragment
;
420 else if (m
->from_etc_fstab
)
421 p
= &m
->parameters_etc_fstab
;
426 (!mount_test_option(p
->options
, "_netdev") &&
427 !(p
->fstype
&& fstype_is_network(p
->fstype
)) &&
428 (mount_test_option(p
->options
, "usrquota") || mount_test_option(p
->options
, "grpquota"))))
429 if ((r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_BEFORE
, UNIT_WANTS
, SPECIAL_QUOTACHECK_SERVICE
, NULL
, true)) < 0 ||
430 (r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_BEFORE
, UNIT_WANTS
, SPECIAL_QUOTAON_SERVICE
, NULL
, true)) < 0)
433 if ((r
= unit_add_two_dependencies_by_name(UNIT(m
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_UMOUNT_TARGET
, NULL
, true)) < 0)
440 static int mount_verify(Mount
*m
) {
445 if (m
->meta
.load_state
!= UNIT_LOADED
)
448 if (!m
->from_etc_fstab
&& !m
->from_fragment
&& !m
->from_proc_self_mountinfo
)
451 if (!(e
= unit_name_from_path(m
->where
, ".mount")))
454 b
= unit_has_name(UNIT(m
), e
);
458 log_error("%s's Where setting doesn't match unit name. Refusing.", m
->meta
.id
);
462 if (m
->meta
.fragment_path
&& !m
->parameters_fragment
.what
) {
463 log_error("%s's What setting is missing. Refusing.", m
->meta
.id
);
467 if (m
->exec_context
.pam_name
&& m
->exec_context
.kill_mode
!= KILL_CONTROL_GROUP
) {
468 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m
->meta
.id
);
475 static int mount_load(Unit
*u
) {
480 assert(u
->meta
.load_state
== UNIT_STUB
);
482 if ((r
= unit_load_fragment_and_dropin_optional(u
)) < 0)
485 /* This is a new unit? Then let's add in some extras */
486 if (u
->meta
.load_state
== UNIT_LOADED
) {
487 if ((r
= unit_add_exec_dependencies(u
, &m
->exec_context
)) < 0)
490 if (m
->meta
.fragment_path
)
491 m
->from_fragment
= true;
494 if (!(m
->where
= unit_name_to_path(u
->meta
.id
)))
497 path_kill_slashes(m
->where
);
499 if (!m
->meta
.description
)
500 if ((r
= unit_set_description(u
, m
->where
)) < 0)
503 if ((r
= mount_add_device_links(m
)) < 0)
506 if ((r
= mount_add_mount_links(m
)) < 0)
509 if ((r
= mount_add_socket_links(m
)) < 0)
512 if ((r
= mount_add_swap_links(m
)) < 0)
515 if ((r
= mount_add_path_links(m
)) < 0)
518 if ((r
= mount_add_automount_links(m
)) < 0)
521 if ((r
= mount_add_target_links(m
)) < 0)
524 if ((r
= unit_add_default_cgroups(u
)) < 0)
527 if (m
->meta
.default_dependencies
)
528 if ((r
= mount_add_default_dependencies(m
)) < 0)
532 return mount_verify(m
);
535 static int mount_notify_automount(Mount
*m
, int status
) {
541 if ((r
= unit_get_related_unit(UNIT(m
), ".automount", &p
)) < 0)
542 return r
== -ENOENT
? 0 : r
;
544 return automount_send_ready(AUTOMOUNT(p
), status
);
547 static void mount_set_state(Mount
*m
, MountState state
) {
548 MountState old_state
;
551 old_state
= m
->state
;
554 if (state
!= MOUNT_MOUNTING
&&
555 state
!= MOUNT_MOUNTING_DONE
&&
556 state
!= MOUNT_REMOUNTING
&&
557 state
!= MOUNT_UNMOUNTING
&&
558 state
!= MOUNT_MOUNTING_SIGTERM
&&
559 state
!= MOUNT_MOUNTING_SIGKILL
&&
560 state
!= MOUNT_UNMOUNTING_SIGTERM
&&
561 state
!= MOUNT_UNMOUNTING_SIGKILL
&&
562 state
!= MOUNT_REMOUNTING_SIGTERM
&&
563 state
!= MOUNT_REMOUNTING_SIGKILL
) {
564 unit_unwatch_timer(UNIT(m
), &m
->timer_watch
);
565 mount_unwatch_control_pid(m
);
566 m
->control_command
= NULL
;
567 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
570 if (state
== MOUNT_MOUNTED
||
571 state
== MOUNT_REMOUNTING
)
572 mount_notify_automount(m
, 0);
573 else if (state
== MOUNT_DEAD
||
574 state
== MOUNT_UNMOUNTING
||
575 state
== MOUNT_MOUNTING_SIGTERM
||
576 state
== MOUNT_MOUNTING_SIGKILL
||
577 state
== MOUNT_REMOUNTING_SIGTERM
||
578 state
== MOUNT_REMOUNTING_SIGKILL
||
579 state
== MOUNT_UNMOUNTING_SIGTERM
||
580 state
== MOUNT_UNMOUNTING_SIGKILL
||
581 state
== MOUNT_FAILED
)
582 mount_notify_automount(m
, -ENODEV
);
584 if (state
!= old_state
)
585 log_debug("%s changed %s -> %s",
587 mount_state_to_string(old_state
),
588 mount_state_to_string(state
));
590 unit_notify(UNIT(m
), state_translation_table
[old_state
], state_translation_table
[state
], !m
->reload_failure
);
591 m
->reload_failure
= false;
594 static int mount_coldplug(Unit
*u
) {
596 MountState new_state
= MOUNT_DEAD
;
600 assert(m
->state
== MOUNT_DEAD
);
602 if (m
->deserialized_state
!= m
->state
)
603 new_state
= m
->deserialized_state
;
604 else if (m
->from_proc_self_mountinfo
)
605 new_state
= MOUNT_MOUNTED
;
607 if (new_state
!= m
->state
) {
609 if (new_state
== MOUNT_MOUNTING
||
610 new_state
== MOUNT_MOUNTING_DONE
||
611 new_state
== MOUNT_REMOUNTING
||
612 new_state
== MOUNT_UNMOUNTING
||
613 new_state
== MOUNT_MOUNTING_SIGTERM
||
614 new_state
== MOUNT_MOUNTING_SIGKILL
||
615 new_state
== MOUNT_UNMOUNTING_SIGTERM
||
616 new_state
== MOUNT_UNMOUNTING_SIGKILL
||
617 new_state
== MOUNT_REMOUNTING_SIGTERM
||
618 new_state
== MOUNT_REMOUNTING_SIGKILL
) {
620 if (m
->control_pid
<= 0)
623 if ((r
= unit_watch_pid(UNIT(m
), m
->control_pid
)) < 0)
626 if ((r
= unit_watch_timer(UNIT(m
), m
->timeout_usec
, &m
->timer_watch
)) < 0)
630 mount_set_state(m
, new_state
);
636 static void mount_dump(Unit
*u
, FILE *f
, const char *prefix
) {
643 if (m
->from_proc_self_mountinfo
)
644 p
= &m
->parameters_proc_self_mountinfo
;
645 else if (m
->from_fragment
)
646 p
= &m
->parameters_fragment
;
648 p
= &m
->parameters_etc_fstab
;
651 "%sMount State: %s\n"
654 "%sFile System Type: %s\n"
656 "%sFrom /etc/fstab: %s\n"
657 "%sFrom /proc/self/mountinfo: %s\n"
658 "%sFrom fragment: %s\n"
659 "%sDirectoryMode: %04o\n",
660 prefix
, mount_state_to_string(m
->state
),
662 prefix
, strna(p
->what
),
663 prefix
, strna(p
->fstype
),
664 prefix
, strna(p
->options
),
665 prefix
, yes_no(m
->from_etc_fstab
),
666 prefix
, yes_no(m
->from_proc_self_mountinfo
),
667 prefix
, yes_no(m
->from_fragment
),
668 prefix
, m
->directory_mode
);
670 if (m
->control_pid
> 0)
672 "%sControl PID: %lu\n",
673 prefix
, (unsigned long) m
->control_pid
);
675 exec_context_dump(&m
->exec_context
, f
, prefix
);
678 static int mount_spawn(Mount
*m
, ExecCommand
*c
, pid_t
*_pid
) {
686 if ((r
= unit_watch_timer(UNIT(m
), m
->timeout_usec
, &m
->timer_watch
)) < 0)
689 if ((r
= exec_spawn(c
,
693 m
->meta
.manager
->environment
,
697 m
->meta
.manager
->confirm_spawn
,
698 m
->meta
.cgroup_bondings
,
702 if ((r
= unit_watch_pid(UNIT(m
), pid
)) < 0)
703 /* FIXME: we need to do something here */
711 unit_unwatch_timer(UNIT(m
), &m
->timer_watch
);
716 static void mount_enter_dead(Mount
*m
, bool success
) {
722 mount_set_state(m
, m
->failure
? MOUNT_FAILED
: MOUNT_DEAD
);
725 static void mount_enter_mounted(Mount
*m
, bool success
) {
731 mount_set_state(m
, MOUNT_MOUNTED
);
734 static void mount_enter_signal(Mount
*m
, MountState state
, bool success
) {
737 bool wait_for_exit
= false;
744 if (m
->exec_context
.kill_mode
!= KILL_NONE
) {
745 int sig
= (state
== MOUNT_MOUNTING_SIGTERM
||
746 state
== MOUNT_UNMOUNTING_SIGTERM
||
747 state
== MOUNT_REMOUNTING_SIGTERM
) ? m
->exec_context
.kill_signal
: SIGKILL
;
749 if (m
->control_pid
> 0) {
750 if (kill_and_sigcont(m
->control_pid
, sig
) < 0 && errno
!= ESRCH
)
752 log_warning("Failed to kill control process %li: %m", (long) m
->control_pid
);
754 wait_for_exit
= true;
757 if (m
->exec_context
.kill_mode
== KILL_CONTROL_GROUP
) {
759 if (!(pid_set
= set_new(trivial_hash_func
, trivial_compare_func
))) {
764 /* Exclude the control pid from being killed via the cgroup */
765 if (m
->control_pid
> 0)
766 if ((r
= set_put(pid_set
, LONG_TO_PTR(m
->control_pid
))) < 0)
769 if ((r
= cgroup_bonding_kill_list(m
->meta
.cgroup_bondings
, sig
, true, pid_set
)) < 0) {
770 if (r
!= -EAGAIN
&& r
!= -ESRCH
&& r
!= -ENOENT
)
771 log_warning("Failed to kill control group: %s", strerror(-r
));
773 wait_for_exit
= true;
780 if ((r
= unit_watch_timer(UNIT(m
), m
->timeout_usec
, &m
->timer_watch
)) < 0)
783 mount_set_state(m
, state
);
784 } else if (state
== MOUNT_REMOUNTING_SIGTERM
|| state
== MOUNT_REMOUNTING_SIGKILL
)
785 mount_enter_mounted(m
, true);
787 mount_enter_dead(m
, true);
792 log_warning("%s failed to kill processes: %s", m
->meta
.id
, strerror(-r
));
794 if (state
== MOUNT_REMOUNTING_SIGTERM
|| state
== MOUNT_REMOUNTING_SIGKILL
)
795 mount_enter_mounted(m
, false);
797 mount_enter_dead(m
, false);
803 static void mount_enter_unmounting(Mount
*m
, bool success
) {
811 m
->control_command_id
= MOUNT_EXEC_UNMOUNT
;
812 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_UNMOUNT
;
814 if ((r
= exec_command_set(
821 mount_unwatch_control_pid(m
);
823 if ((r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
)) < 0)
826 mount_set_state(m
, MOUNT_UNMOUNTING
);
831 log_warning("%s failed to run 'umount' task: %s", m
->meta
.id
, strerror(-r
));
832 mount_enter_mounted(m
, false);
835 static void mount_enter_mounting(Mount
*m
) {
840 m
->control_command_id
= MOUNT_EXEC_MOUNT
;
841 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_MOUNT
;
843 mkdir_p(m
->where
, m
->directory_mode
);
845 /* create the source directory for bind-mounts if needed */
846 if (m
->parameters_fragment
.fstype
&& strcmp(m
->parameters_fragment
.fstype
, "bind") == 0)
847 mkdir_p(m
->parameters_fragment
.what
, m
->directory_mode
);
849 if (m
->from_fragment
)
850 r
= exec_command_set(
853 m
->parameters_fragment
.what
,
855 "-t", m
->parameters_fragment
.fstype
? m
->parameters_fragment
.fstype
: "auto",
856 m
->parameters_fragment
.options
? "-o" : NULL
, m
->parameters_fragment
.options
,
858 else if (m
->from_etc_fstab
)
859 r
= exec_command_set(
870 mount_unwatch_control_pid(m
);
872 if ((r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
)) < 0)
875 mount_set_state(m
, MOUNT_MOUNTING
);
880 log_warning("%s failed to run 'mount' task: %s", m
->meta
.id
, strerror(-r
));
881 mount_enter_dead(m
, false);
884 static void mount_enter_mounting_done(Mount
*m
) {
887 mount_set_state(m
, MOUNT_MOUNTING_DONE
);
890 static void mount_enter_remounting(Mount
*m
, bool success
) {
898 m
->control_command_id
= MOUNT_EXEC_REMOUNT
;
899 m
->control_command
= m
->exec_command
+ MOUNT_EXEC_REMOUNT
;
901 if (m
->from_fragment
) {
905 if (m
->parameters_fragment
.options
) {
906 if (!(buf
= strappend("remount,", m
->parameters_fragment
.options
))) {
915 r
= exec_command_set(
918 m
->parameters_fragment
.what
,
920 "-t", m
->parameters_fragment
.fstype
? m
->parameters_fragment
.fstype
: "auto",
925 } else if (m
->from_etc_fstab
)
926 r
= exec_command_set(
938 mount_unwatch_control_pid(m
);
940 if ((r
= mount_spawn(m
, m
->control_command
, &m
->control_pid
)) < 0)
943 mount_set_state(m
, MOUNT_REMOUNTING
);
948 log_warning("%s failed to run 'remount' task: %s", m
->meta
.id
, strerror(-r
));
949 m
->reload_failure
= true;
950 mount_enter_mounted(m
, true);
953 static int mount_start(Unit
*u
) {
958 /* We cannot fulfill this request right now, try again later
960 if (m
->state
== MOUNT_UNMOUNTING
||
961 m
->state
== MOUNT_UNMOUNTING_SIGTERM
||
962 m
->state
== MOUNT_UNMOUNTING_SIGKILL
||
963 m
->state
== MOUNT_MOUNTING_SIGTERM
||
964 m
->state
== MOUNT_MOUNTING_SIGKILL
)
968 if (m
->state
== MOUNT_MOUNTING
)
971 assert(m
->state
== MOUNT_DEAD
|| m
->state
== MOUNT_FAILED
);
974 mount_enter_mounting(m
);
978 static int mount_stop(Unit
*u
) {
984 if (m
->state
== MOUNT_UNMOUNTING
||
985 m
->state
== MOUNT_UNMOUNTING_SIGKILL
||
986 m
->state
== MOUNT_UNMOUNTING_SIGTERM
||
987 m
->state
== MOUNT_MOUNTING_SIGTERM
||
988 m
->state
== MOUNT_MOUNTING_SIGKILL
)
991 assert(m
->state
== MOUNT_MOUNTING
||
992 m
->state
== MOUNT_MOUNTING_DONE
||
993 m
->state
== MOUNT_MOUNTED
||
994 m
->state
== MOUNT_REMOUNTING
||
995 m
->state
== MOUNT_REMOUNTING_SIGTERM
||
996 m
->state
== MOUNT_REMOUNTING_SIGKILL
);
998 mount_enter_unmounting(m
, true);
1002 static int mount_reload(Unit
*u
) {
1003 Mount
*m
= MOUNT(u
);
1007 if (m
->state
== MOUNT_MOUNTING_DONE
)
1010 assert(m
->state
== MOUNT_MOUNTED
);
1012 mount_enter_remounting(m
, true);
1016 static int mount_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
1017 Mount
*m
= MOUNT(u
);
1023 unit_serialize_item(u
, f
, "state", mount_state_to_string(m
->state
));
1024 unit_serialize_item(u
, f
, "failure", yes_no(m
->failure
));
1026 if (m
->control_pid
> 0)
1027 unit_serialize_item_format(u
, f
, "control-pid", "%lu", (unsigned long) m
->control_pid
);
1029 if (m
->control_command_id
>= 0)
1030 unit_serialize_item(u
, f
, "control-command", mount_exec_command_to_string(m
->control_command_id
));
1035 static int mount_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
1036 Mount
*m
= MOUNT(u
);
1043 if (streq(key
, "state")) {
1046 if ((state
= mount_state_from_string(value
)) < 0)
1047 log_debug("Failed to parse state value %s", value
);
1049 m
->deserialized_state
= state
;
1050 } else if (streq(key
, "failure")) {
1053 if ((b
= parse_boolean(value
)) < 0)
1054 log_debug("Failed to parse failure value %s", value
);
1056 m
->failure
= b
|| m
->failure
;
1058 } else if (streq(key
, "control-pid")) {
1061 if (parse_pid(value
, &pid
) < 0)
1062 log_debug("Failed to parse control-pid value %s", value
);
1064 m
->control_pid
= pid
;
1065 } else if (streq(key
, "control-command")) {
1066 MountExecCommand id
;
1068 if ((id
= mount_exec_command_from_string(value
)) < 0)
1069 log_debug("Failed to parse exec-command value %s", value
);
1071 m
->control_command_id
= id
;
1072 m
->control_command
= m
->exec_command
+ id
;
1076 log_debug("Unknown serialization key '%s'", key
);
1081 static UnitActiveState
mount_active_state(Unit
*u
) {
1084 return state_translation_table
[MOUNT(u
)->state
];
1087 static const char *mount_sub_state_to_string(Unit
*u
) {
1090 return mount_state_to_string(MOUNT(u
)->state
);
1093 static bool mount_check_gc(Unit
*u
) {
1094 Mount
*m
= MOUNT(u
);
1098 return m
->from_etc_fstab
|| m
->from_proc_self_mountinfo
;
1101 static void mount_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
1102 Mount
*m
= MOUNT(u
);
1108 if (pid
!= m
->control_pid
)
1113 success
= is_clean_exit(code
, status
);
1114 m
->failure
= m
->failure
|| !success
;
1116 if (m
->control_command
) {
1117 exec_status_exit(&m
->control_command
->exec_status
, pid
, code
, status
, m
->exec_context
.utmp_id
);
1118 m
->control_command
= NULL
;
1119 m
->control_command_id
= _MOUNT_EXEC_COMMAND_INVALID
;
1122 log_full(success
? LOG_DEBUG
: LOG_NOTICE
,
1123 "%s mount process exited, code=%s status=%i", u
->meta
.id
, sigchld_code_to_string(code
), status
);
1125 /* Note that mount(8) returning and the kernel sending us a
1126 * mount table change event might happen out-of-order. If an
1127 * operation succeed we assume the kernel will follow soon too
1128 * and already change into the resulting state. If it fails
1129 * we check if the kernel still knows about the mount. and
1130 * change state accordingly. */
1134 case MOUNT_MOUNTING
:
1135 case MOUNT_MOUNTING_DONE
:
1136 case MOUNT_MOUNTING_SIGKILL
:
1137 case MOUNT_MOUNTING_SIGTERM
:
1140 mount_enter_mounted(m
, true);
1141 else if (m
->from_proc_self_mountinfo
)
1142 mount_enter_mounted(m
, false);
1144 mount_enter_dead(m
, false);
1147 case MOUNT_REMOUNTING
:
1148 case MOUNT_REMOUNTING_SIGKILL
:
1149 case MOUNT_REMOUNTING_SIGTERM
:
1151 m
->reload_failure
= !success
;
1152 if (m
->from_proc_self_mountinfo
)
1153 mount_enter_mounted(m
, true);
1155 mount_enter_dead(m
, true);
1159 case MOUNT_UNMOUNTING
:
1160 case MOUNT_UNMOUNTING_SIGKILL
:
1161 case MOUNT_UNMOUNTING_SIGTERM
:
1164 mount_enter_dead(m
, true);
1165 else if (m
->from_proc_self_mountinfo
)
1166 mount_enter_mounted(m
, false);
1168 mount_enter_dead(m
, false);
1172 assert_not_reached("Uh, control process died at wrong time.");
1175 /* Notify clients about changed exit status */
1176 unit_add_to_dbus_queue(u
);
1179 static void mount_timer_event(Unit
*u
, uint64_t elapsed
, Watch
*w
) {
1180 Mount
*m
= MOUNT(u
);
1183 assert(elapsed
== 1);
1184 assert(w
== &m
->timer_watch
);
1188 case MOUNT_MOUNTING
:
1189 case MOUNT_MOUNTING_DONE
:
1190 log_warning("%s mounting timed out. Stopping.", u
->meta
.id
);
1191 mount_enter_signal(m
, MOUNT_MOUNTING_SIGTERM
, false);
1194 case MOUNT_REMOUNTING
:
1195 log_warning("%s remounting timed out. Stopping.", u
->meta
.id
);
1196 m
->reload_failure
= true;
1197 mount_enter_mounted(m
, true);
1200 case MOUNT_UNMOUNTING
:
1201 log_warning("%s unmounting timed out. Stopping.", u
->meta
.id
);
1202 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGTERM
, false);
1205 case MOUNT_MOUNTING_SIGTERM
:
1206 if (m
->exec_context
.send_sigkill
) {
1207 log_warning("%s mounting timed out. Killing.", u
->meta
.id
);
1208 mount_enter_signal(m
, MOUNT_MOUNTING_SIGKILL
, false);
1210 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u
->meta
.id
);
1212 if (m
->from_proc_self_mountinfo
)
1213 mount_enter_mounted(m
, false);
1215 mount_enter_dead(m
, false);
1219 case MOUNT_REMOUNTING_SIGTERM
:
1220 if (m
->exec_context
.send_sigkill
) {
1221 log_warning("%s remounting timed out. Killing.", u
->meta
.id
);
1222 mount_enter_signal(m
, MOUNT_REMOUNTING_SIGKILL
, false);
1224 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u
->meta
.id
);
1226 if (m
->from_proc_self_mountinfo
)
1227 mount_enter_mounted(m
, false);
1229 mount_enter_dead(m
, false);
1233 case MOUNT_UNMOUNTING_SIGTERM
:
1234 if (m
->exec_context
.send_sigkill
) {
1235 log_warning("%s unmounting timed out. Killing.", u
->meta
.id
);
1236 mount_enter_signal(m
, MOUNT_UNMOUNTING_SIGKILL
, false);
1238 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u
->meta
.id
);
1240 if (m
->from_proc_self_mountinfo
)
1241 mount_enter_mounted(m
, false);
1243 mount_enter_dead(m
, false);
1247 case MOUNT_MOUNTING_SIGKILL
:
1248 case MOUNT_REMOUNTING_SIGKILL
:
1249 case MOUNT_UNMOUNTING_SIGKILL
:
1250 log_warning("%s mount process still around after SIGKILL. Ignoring.", u
->meta
.id
);
1252 if (m
->from_proc_self_mountinfo
)
1253 mount_enter_mounted(m
, false);
1255 mount_enter_dead(m
, false);
1259 assert_not_reached("Timeout at wrong time.");
1263 static int mount_add_one(
1267 const char *options
,
1270 bool from_proc_self_mountinfo
,
1275 char *e
, *w
= NULL
, *o
= NULL
, *f
= NULL
;
1284 assert(!set_flags
|| from_proc_self_mountinfo
);
1286 /* Ignore API mount points. They should never be referenced in
1287 * dependencies ever. */
1288 if (mount_point_is_api(where
))
1290 if (mount_point_ignore(where
))
1293 if (streq(fstype
, "autofs"))
1296 /* probably some kind of swap, ignore */
1297 if (!is_path(where
))
1300 if (!(e
= unit_name_from_path(where
, ".mount")))
1303 if (!(u
= manager_get_unit(m
, e
))) {
1306 if (!(u
= unit_new(m
))) {
1311 r
= unit_add_name(u
, e
);
1317 if (!(MOUNT(u
)->where
= strdup(where
))) {
1322 unit_add_to_load_queue(u
);
1328 if (!(w
= strdup(what
)) ||
1329 !(o
= strdup(options
)) ||
1330 !(f
= strdup(fstype
))) {
1335 if (from_proc_self_mountinfo
) {
1336 p
= &MOUNT(u
)->parameters_proc_self_mountinfo
;
1339 MOUNT(u
)->is_mounted
= true;
1340 MOUNT(u
)->just_mounted
= !MOUNT(u
)->from_proc_self_mountinfo
;
1341 MOUNT(u
)->just_changed
= !streq_ptr(p
->options
, o
);
1344 MOUNT(u
)->from_proc_self_mountinfo
= true;
1346 p
= &MOUNT(u
)->parameters_etc_fstab
;
1347 MOUNT(u
)->from_etc_fstab
= true;
1361 unit_add_to_dbus_queue(u
);
1376 static int mount_find_pri(char *options
) {
1380 if (!(pri
= mount_test_option(options
, "pri=")))
1386 r
= strtoul(pri
, &end
, 10);
1391 if (end
== pri
|| (*end
!= ',' && *end
!= 0))
1397 static int mount_load_etc_fstab(Manager
*m
) {
1405 if (!(f
= setmntent("/etc/fstab", "r")))
1408 while ((me
= getmntent(f
))) {
1412 if (!(what
= fstab_node_to_udev_node(me
->mnt_fsname
))) {
1417 if (!(where
= strdup(me
->mnt_dir
))) {
1424 path_kill_slashes(what
);
1426 if (where
[0] == '/')
1427 path_kill_slashes(where
);
1429 if (streq(me
->mnt_type
, "swap")) {
1432 if ((pri
= mount_find_pri(me
->mnt_opts
)) < 0)
1439 !!mount_test_option(me
->mnt_opts
, MNTOPT_NOAUTO
),
1440 !!mount_test_option(me
->mnt_opts
, "nofail"),
1441 !!mount_test_option(me
->mnt_opts
, "comment=systemd.swapon"),
1444 k
= mount_add_one(m
, what
, where
, me
->mnt_opts
, me
->mnt_type
, me
->mnt_passno
, false, false);
1459 static int mount_load_proc_self_mountinfo(Manager
*m
, bool set_flags
) {
1462 char *device
, *path
, *options
, *options2
, *fstype
, *d
, *p
, *o
;
1466 rewind(m
->proc_self_mountinfo
);
1471 device
= path
= options
= options2
= fstype
= d
= p
= o
= NULL
;
1473 if ((k
= fscanf(m
->proc_self_mountinfo
,
1474 "%*s " /* (1) mount id */
1475 "%*s " /* (2) parent id */
1476 "%*s " /* (3) major:minor */
1477 "%*s " /* (4) root */
1478 "%ms " /* (5) mount point */
1479 "%ms" /* (6) mount options */
1480 "%*[^-]" /* (7) optional fields */
1481 "- " /* (8) separator */
1482 "%ms " /* (9) file system type */
1483 "%ms" /* (10) mount source */
1484 "%ms" /* (11) mount options 2 */
1485 "%*[^\n]", /* some rubbish at the end */
1495 log_warning("Failed to parse /proc/self/mountinfo:%u.", i
);
1499 if (asprintf(&o
, "%s,%s", options
, options2
) < 0) {
1504 if (!(d
= cunescape(device
)) ||
1505 !(p
= cunescape(path
))) {
1510 if ((k
= mount_add_one(m
, d
, p
, o
, fstype
, 0, true, set_flags
)) < 0)
1537 static void mount_shutdown(Manager
*m
) {
1540 if (m
->proc_self_mountinfo
) {
1541 fclose(m
->proc_self_mountinfo
);
1542 m
->proc_self_mountinfo
= NULL
;
1546 static int mount_enumerate(Manager
*m
) {
1548 struct epoll_event ev
;
1551 if (!m
->proc_self_mountinfo
) {
1552 if (!(m
->proc_self_mountinfo
= fopen("/proc/self/mountinfo", "re")))
1555 m
->mount_watch
.type
= WATCH_MOUNT
;
1556 m
->mount_watch
.fd
= fileno(m
->proc_self_mountinfo
);
1559 ev
.events
= EPOLLPRI
;
1560 ev
.data
.ptr
= &m
->mount_watch
;
1562 if (epoll_ctl(m
->epoll_fd
, EPOLL_CTL_ADD
, m
->mount_watch
.fd
, &ev
) < 0)
1566 if ((r
= mount_load_etc_fstab(m
)) < 0)
1569 if ((r
= mount_load_proc_self_mountinfo(m
, false)) < 0)
1579 void mount_fd_event(Manager
*m
, int events
) {
1584 assert(events
& EPOLLPRI
);
1586 /* The manager calls this for every fd event happening on the
1587 * /proc/self/mountinfo file, which informs us about mounting
1590 if ((r
= mount_load_proc_self_mountinfo(m
, true)) < 0) {
1591 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r
));
1593 /* Reset flags, just in case, for later calls */
1594 LIST_FOREACH(units_per_type
, meta
, m
->units_per_type
[UNIT_MOUNT
]) {
1595 Mount
*mount
= (Mount
*) meta
;
1597 mount
->is_mounted
= mount
->just_mounted
= mount
->just_changed
= false;
1603 manager_dispatch_load_queue(m
);
1605 LIST_FOREACH(units_per_type
, meta
, m
->units_per_type
[UNIT_MOUNT
]) {
1606 Mount
*mount
= (Mount
*) meta
;
1608 if (!mount
->is_mounted
) {
1609 /* This has just been unmounted. */
1611 mount
->from_proc_self_mountinfo
= false;
1613 switch (mount
->state
) {
1616 mount_enter_dead(mount
, true);
1620 mount_set_state(mount
, mount
->state
);
1625 } else if (mount
->just_mounted
|| mount
->just_changed
) {
1627 /* New or changed mount entry */
1629 switch (mount
->state
) {
1633 mount_enter_mounted(mount
, true);
1636 case MOUNT_MOUNTING
:
1637 mount_enter_mounting_done(mount
);
1641 /* Nothing really changed, but let's
1642 * issue an notification call
1643 * nonetheless, in case somebody is
1644 * waiting for this. (e.g. file system
1645 * ro/rw remounts.) */
1646 mount_set_state(mount
, mount
->state
);
1651 /* Reset the flags for later calls */
1652 mount
->is_mounted
= mount
->just_mounted
= mount
->just_changed
= false;
1656 static void mount_reset_failed(Unit
*u
) {
1657 Mount
*m
= MOUNT(u
);
1661 if (m
->state
== MOUNT_FAILED
)
1662 mount_set_state(m
, MOUNT_DEAD
);
1667 static int mount_kill(Unit
*u
, KillWho who
, KillMode mode
, int signo
, DBusError
*error
) {
1668 Mount
*m
= MOUNT(u
);
1670 Set
*pid_set
= NULL
;
1674 if (who
== KILL_MAIN
) {
1675 dbus_set_error(error
, BUS_ERROR_NO_SUCH_PROCESS
, "Mount units have no main processes");
1679 if (m
->control_pid
<= 0 && who
== KILL_CONTROL
) {
1680 dbus_set_error(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No control process to kill");
1684 if (m
->control_pid
> 0)
1685 if (kill(m
->control_pid
, signo
) < 0)
1688 if (mode
== KILL_CONTROL_GROUP
) {
1691 if (!(pid_set
= set_new(trivial_hash_func
, trivial_compare_func
)))
1694 /* Exclude the control pid from being killed via the cgroup */
1695 if (m
->control_pid
> 0)
1696 if ((q
= set_put(pid_set
, LONG_TO_PTR(m
->control_pid
))) < 0) {
1701 if ((q
= cgroup_bonding_kill_list(m
->meta
.cgroup_bondings
, signo
, false, pid_set
)) < 0)
1702 if (r
!= -EAGAIN
&& r
!= -ESRCH
&& r
!= -ENOENT
)
1713 static const char* const mount_state_table
[_MOUNT_STATE_MAX
] = {
1714 [MOUNT_DEAD
] = "dead",
1715 [MOUNT_MOUNTING
] = "mounting",
1716 [MOUNT_MOUNTING_DONE
] = "mounting-done",
1717 [MOUNT_MOUNTED
] = "mounted",
1718 [MOUNT_REMOUNTING
] = "remounting",
1719 [MOUNT_UNMOUNTING
] = "unmounting",
1720 [MOUNT_MOUNTING_SIGTERM
] = "mounting-sigterm",
1721 [MOUNT_MOUNTING_SIGKILL
] = "mounting-sigkill",
1722 [MOUNT_REMOUNTING_SIGTERM
] = "remounting-sigterm",
1723 [MOUNT_REMOUNTING_SIGKILL
] = "remounting-sigkill",
1724 [MOUNT_UNMOUNTING_SIGTERM
] = "unmounting-sigterm",
1725 [MOUNT_UNMOUNTING_SIGKILL
] = "unmounting-sigkill",
1726 [MOUNT_FAILED
] = "failed"
1729 DEFINE_STRING_TABLE_LOOKUP(mount_state
, MountState
);
1731 static const char* const mount_exec_command_table
[_MOUNT_EXEC_COMMAND_MAX
] = {
1732 [MOUNT_EXEC_MOUNT
] = "ExecMount",
1733 [MOUNT_EXEC_UNMOUNT
] = "ExecUnmount",
1734 [MOUNT_EXEC_REMOUNT
] = "ExecRemount",
1737 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command
, MountExecCommand
);
1739 const UnitVTable mount_vtable
= {
1743 .no_instances
= true,
1745 .show_status
= true,
1751 .coldplug
= mount_coldplug
,
1755 .start
= mount_start
,
1757 .reload
= mount_reload
,
1761 .serialize
= mount_serialize
,
1762 .deserialize_item
= mount_deserialize_item
,
1764 .active_state
= mount_active_state
,
1765 .sub_state_to_string
= mount_sub_state_to_string
,
1767 .check_gc
= mount_check_gc
,
1769 .sigchld_event
= mount_sigchld_event
,
1770 .timer_event
= mount_timer_event
,
1772 .reset_failed
= mount_reset_failed
,
1774 .bus_interface
= "org.freedesktop.systemd1.Mount",
1775 .bus_message_handler
= bus_mount_message_handler
,
1776 .bus_invalidating_properties
= bus_mount_invalidating_properties
,
1778 .enumerate
= mount_enumerate
,
1779 .shutdown
= mount_shutdown