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);
69 /* The stdio/kmsg bridge socket is on /, in order to avoid a
70 * dep loop, don't use kmsg logging for -.mount */
71 if (!unit_has_name(u, "-.mount"))
72 m->exec_context.std_output = EXEC_OUTPUT_KMSG;
74 /* We need to make sure that /bin/mount is always called in
75 * the same process group as us, so that the autofs kernel
76 * side doesn't send us another mount request while we are
77 * already trying to comply its last one. */
78 m->exec_context.same_pgrp = true;
80 m->timer_watch.type = WATCH_INVALID;
82 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
85 static void mount_unwatch_control_pid(Mount *m) {
88 if (m->control_pid <= 0)
91 unit_unwatch_pid(UNIT(m), m->control_pid);
95 static void mount_parameters_done(MountParameters *p) {
102 p->what = p->options = p->fstype = NULL;
105 static void mount_done(Unit *u) {
114 /* Try to detach us from the automount unit if there is any */
115 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
116 Automount *a = (Automount*) other;
122 mount_parameters_done(&m->parameters_etc_fstab);
123 mount_parameters_done(&m->parameters_proc_self_mountinfo);
124 mount_parameters_done(&m->parameters_fragment);
126 exec_context_done(&m->exec_context);
127 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
128 m->control_command = NULL;
130 mount_unwatch_control_pid(m);
132 unit_unwatch_timer(u, &m->timer_watch);
135 static MountParameters* get_mount_parameters_configured(Mount *m) {
138 if (m->from_fragment)
139 return &m->parameters_fragment;
140 else if (m->from_etc_fstab)
141 return &m->parameters_etc_fstab;
146 static MountParameters* get_mount_parameters(Mount *m) {
149 if (m->from_proc_self_mountinfo)
150 return &m->parameters_proc_self_mountinfo;
152 return get_mount_parameters_configured(m);
155 static int mount_add_mount_links(Mount *m) {
162 pm = get_mount_parameters_configured(m);
164 /* Adds in links to other mount points that might lie below or
165 * above us in the hierarchy */
167 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
168 Mount *n = (Mount*) other;
174 if (n->meta.load_state != UNIT_LOADED)
177 pn = get_mount_parameters_configured(n);
179 if (path_startswith(m->where, n->where)) {
181 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
185 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
188 } else if (path_startswith(n->where, m->where)) {
190 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
194 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
197 } else if (pm && path_startswith(pm->what, n->where)) {
199 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
202 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
205 } else if (pn && path_startswith(pn->what, m->where)) {
207 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
210 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
218 static int mount_add_swap_links(Mount *m) {
224 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
225 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
231 static int mount_add_path_links(Mount *m) {
237 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
238 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
244 static int mount_add_automount_links(Mount *m) {
250 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
251 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
257 static int mount_add_socket_links(Mount *m) {
263 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
264 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
270 static char* mount_test_option(const char *haystack, const char *needle) {
275 /* Like glibc's hasmntopt(), but works on a string, not a
282 me.mnt_opts = (char*) haystack;
284 return hasmntopt(&me, needle);
287 static bool mount_is_network(MountParameters *p) {
290 if (mount_test_option(p->options, "_netdev"))
293 if (p->fstype && fstype_is_network(p->fstype))
299 static bool mount_is_bind(MountParameters *p) {
302 if (mount_test_option(p->options, "bind"))
305 if (p->fstype && streq(p->fstype, "bind"))
311 static bool needs_quota(MountParameters *p) {
314 if (mount_is_network(p))
317 if (mount_is_bind(p))
320 return mount_test_option(p->options, "usrquota") ||
321 mount_test_option(p->options, "grpquota");
324 static int mount_add_target_links(Mount *m) {
325 const char *target, *after = NULL;
329 bool noauto, nofail, handle, automount;
333 if (!(p = get_mount_parameters_configured(m)))
336 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
337 nofail = !!mount_test_option(p->options, "nofail");
339 mount_test_option(p->options, "comment=systemd.mount") ||
340 mount_test_option(p->options, "x-systemd-mount") ||
341 m->meta.manager->mount_auto;
343 mount_test_option(p->options, "comment=systemd.automount") ||
344 mount_test_option(p->options, "x-systemd-automount");
346 if (mount_is_network(p)) {
347 target = SPECIAL_REMOTE_FS_TARGET;
349 if (m->meta.manager->running_as == MANAGER_SYSTEM)
350 after = SPECIAL_NETWORK_TARGET;
352 target = SPECIAL_LOCAL_FS_TARGET;
354 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
358 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
361 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
364 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
367 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
370 /* Automatically add mount points that aren't natively
371 * configured to local-fs.target */
376 m->meta.manager->running_as == MANAGER_SYSTEM)
377 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
380 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
384 static int mount_add_device_links(Mount *m) {
390 if (!(p = get_mount_parameters_configured(m)))
396 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
399 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
400 nofail = !!mount_test_option(p->options, "nofail");
402 if ((r = unit_add_node_link(UNIT(m), p->what,
404 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
410 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
411 !path_equal(m->where, "/")) {
414 /* Let's add in the fsck service */
416 /* aka SPECIAL_FSCK_SERVICE */
417 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
420 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
421 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
428 SERVICE(fsck)->fsck_passno = p->passno;
430 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
437 static int mount_add_default_dependencies(Mount *m) {
442 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
443 !path_equal(m->where, "/")) {
446 p = get_mount_parameters_configured(m);
448 if (p && needs_quota(p)) {
449 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
450 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
454 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
461 static int mount_verify(Mount *m) {
466 if (m->meta.load_state != UNIT_LOADED)
469 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
472 if (!(e = unit_name_from_path(m->where, ".mount")))
475 b = unit_has_name(UNIT(m), e);
479 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
483 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
484 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
488 if (m->meta.fragment_path && !m->parameters_fragment.what) {
489 log_error("%s's What setting is missing. Refusing.", m->meta.id);
493 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
494 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
501 static int mount_load(Unit *u) {
506 assert(u->meta.load_state == UNIT_STUB);
508 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
511 /* This is a new unit? Then let's add in some extras */
512 if (u->meta.load_state == UNIT_LOADED) {
513 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
516 if (m->meta.fragment_path)
517 m->from_fragment = true;
520 if (!(m->where = unit_name_to_path(u->meta.id)))
523 path_kill_slashes(m->where);
525 if (!m->meta.description)
526 if ((r = unit_set_description(u, m->where)) < 0)
529 if ((r = mount_add_device_links(m)) < 0)
532 if ((r = mount_add_mount_links(m)) < 0)
535 if ((r = mount_add_socket_links(m)) < 0)
538 if ((r = mount_add_swap_links(m)) < 0)
541 if ((r = mount_add_path_links(m)) < 0)
544 if ((r = mount_add_automount_links(m)) < 0)
547 if ((r = mount_add_target_links(m)) < 0)
550 if ((r = unit_add_default_cgroups(u)) < 0)
553 if (m->meta.default_dependencies)
554 if ((r = mount_add_default_dependencies(m)) < 0)
558 return mount_verify(m);
561 static int mount_notify_automount(Mount *m, int status) {
567 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
568 return r == -ENOENT ? 0 : r;
570 return automount_send_ready(AUTOMOUNT(p), status);
573 static void mount_set_state(Mount *m, MountState state) {
574 MountState old_state;
577 old_state = m->state;
580 if (state != MOUNT_MOUNTING &&
581 state != MOUNT_MOUNTING_DONE &&
582 state != MOUNT_REMOUNTING &&
583 state != MOUNT_UNMOUNTING &&
584 state != MOUNT_MOUNTING_SIGTERM &&
585 state != MOUNT_MOUNTING_SIGKILL &&
586 state != MOUNT_UNMOUNTING_SIGTERM &&
587 state != MOUNT_UNMOUNTING_SIGKILL &&
588 state != MOUNT_REMOUNTING_SIGTERM &&
589 state != MOUNT_REMOUNTING_SIGKILL) {
590 unit_unwatch_timer(UNIT(m), &m->timer_watch);
591 mount_unwatch_control_pid(m);
592 m->control_command = NULL;
593 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
596 if (state == MOUNT_MOUNTED ||
597 state == MOUNT_REMOUNTING)
598 mount_notify_automount(m, 0);
599 else if (state == MOUNT_DEAD ||
600 state == MOUNT_UNMOUNTING ||
601 state == MOUNT_MOUNTING_SIGTERM ||
602 state == MOUNT_MOUNTING_SIGKILL ||
603 state == MOUNT_REMOUNTING_SIGTERM ||
604 state == MOUNT_REMOUNTING_SIGKILL ||
605 state == MOUNT_UNMOUNTING_SIGTERM ||
606 state == MOUNT_UNMOUNTING_SIGKILL ||
607 state == MOUNT_FAILED)
608 mount_notify_automount(m, -ENODEV);
610 if (state != old_state)
611 log_debug("%s changed %s -> %s",
613 mount_state_to_string(old_state),
614 mount_state_to_string(state));
616 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
617 m->reload_failure = false;
620 static int mount_coldplug(Unit *u) {
622 MountState new_state = MOUNT_DEAD;
626 assert(m->state == MOUNT_DEAD);
628 if (m->deserialized_state != m->state)
629 new_state = m->deserialized_state;
630 else if (m->from_proc_self_mountinfo)
631 new_state = MOUNT_MOUNTED;
633 if (new_state != m->state) {
635 if (new_state == MOUNT_MOUNTING ||
636 new_state == MOUNT_MOUNTING_DONE ||
637 new_state == MOUNT_REMOUNTING ||
638 new_state == MOUNT_UNMOUNTING ||
639 new_state == MOUNT_MOUNTING_SIGTERM ||
640 new_state == MOUNT_MOUNTING_SIGKILL ||
641 new_state == MOUNT_UNMOUNTING_SIGTERM ||
642 new_state == MOUNT_UNMOUNTING_SIGKILL ||
643 new_state == MOUNT_REMOUNTING_SIGTERM ||
644 new_state == MOUNT_REMOUNTING_SIGKILL) {
646 if (m->control_pid <= 0)
649 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
652 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
656 mount_set_state(m, new_state);
662 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
669 p = get_mount_parameters(m);
672 "%sMount State: %s\n"
675 "%sFile System Type: %s\n"
677 "%sFrom /etc/fstab: %s\n"
678 "%sFrom /proc/self/mountinfo: %s\n"
679 "%sFrom fragment: %s\n"
680 "%sDirectoryMode: %04o\n",
681 prefix, mount_state_to_string(m->state),
683 prefix, strna(p->what),
684 prefix, strna(p->fstype),
685 prefix, strna(p->options),
686 prefix, yes_no(m->from_etc_fstab),
687 prefix, yes_no(m->from_proc_self_mountinfo),
688 prefix, yes_no(m->from_fragment),
689 prefix, m->directory_mode);
691 if (m->control_pid > 0)
693 "%sControl PID: %lu\n",
694 prefix, (unsigned long) m->control_pid);
696 exec_context_dump(&m->exec_context, f, prefix);
699 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
707 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
710 if ((r = exec_spawn(c,
714 m->meta.manager->environment,
718 m->meta.manager->confirm_spawn,
719 m->meta.cgroup_bondings,
723 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
724 /* FIXME: we need to do something here */
732 unit_unwatch_timer(UNIT(m), &m->timer_watch);
737 static void mount_enter_dead(Mount *m, bool success) {
743 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
746 static void mount_enter_mounted(Mount *m, bool success) {
752 mount_set_state(m, MOUNT_MOUNTED);
755 static void mount_enter_signal(Mount *m, MountState state, bool success) {
758 bool wait_for_exit = false;
765 if (m->exec_context.kill_mode != KILL_NONE) {
766 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
767 state == MOUNT_UNMOUNTING_SIGTERM ||
768 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
770 if (m->control_pid > 0) {
771 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
773 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
775 wait_for_exit = true;
778 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
780 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
785 /* Exclude the control pid from being killed via the cgroup */
786 if (m->control_pid > 0)
787 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
790 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
791 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
792 log_warning("Failed to kill control group: %s", strerror(-r));
794 wait_for_exit = true;
802 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
805 mount_set_state(m, state);
806 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
807 mount_enter_mounted(m, true);
809 mount_enter_dead(m, true);
814 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
816 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
817 mount_enter_mounted(m, false);
819 mount_enter_dead(m, false);
825 static void mount_enter_unmounting(Mount *m, bool success) {
833 m->control_command_id = MOUNT_EXEC_UNMOUNT;
834 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
836 if ((r = exec_command_set(
843 mount_unwatch_control_pid(m);
845 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
848 mount_set_state(m, MOUNT_UNMOUNTING);
853 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
854 mount_enter_mounted(m, false);
857 static void mount_enter_mounting(Mount *m) {
863 m->control_command_id = MOUNT_EXEC_MOUNT;
864 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
866 mkdir_p(m->where, m->directory_mode);
868 /* Create the source directory for bind-mounts if needed */
869 p = get_mount_parameters_configured(m);
870 if (p && mount_is_bind(p))
871 mkdir_p(p->what, m->directory_mode);
873 if (m->from_fragment)
874 r = exec_command_set(
877 m->parameters_fragment.what,
879 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
880 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
882 else if (m->from_etc_fstab)
883 r = exec_command_set(
894 mount_unwatch_control_pid(m);
896 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
899 mount_set_state(m, MOUNT_MOUNTING);
904 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
905 mount_enter_dead(m, false);
908 static void mount_enter_mounting_done(Mount *m) {
911 mount_set_state(m, MOUNT_MOUNTING_DONE);
914 static void mount_enter_remounting(Mount *m, bool success) {
922 m->control_command_id = MOUNT_EXEC_REMOUNT;
923 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
925 if (m->from_fragment) {
929 if (m->parameters_fragment.options) {
930 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
939 r = exec_command_set(
942 m->parameters_fragment.what,
944 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
949 } else if (m->from_etc_fstab)
950 r = exec_command_set(
962 mount_unwatch_control_pid(m);
964 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
967 mount_set_state(m, MOUNT_REMOUNTING);
972 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
973 m->reload_failure = true;
974 mount_enter_mounted(m, true);
977 static int mount_start(Unit *u) {
982 /* We cannot fulfill this request right now, try again later
984 if (m->state == MOUNT_UNMOUNTING ||
985 m->state == MOUNT_UNMOUNTING_SIGTERM ||
986 m->state == MOUNT_UNMOUNTING_SIGKILL ||
987 m->state == MOUNT_MOUNTING_SIGTERM ||
988 m->state == MOUNT_MOUNTING_SIGKILL)
992 if (m->state == MOUNT_MOUNTING)
995 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
998 mount_enter_mounting(m);
1002 static int mount_stop(Unit *u) {
1003 Mount *m = MOUNT(u);
1008 if (m->state == MOUNT_UNMOUNTING ||
1009 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1010 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1011 m->state == MOUNT_MOUNTING_SIGTERM ||
1012 m->state == MOUNT_MOUNTING_SIGKILL)
1015 assert(m->state == MOUNT_MOUNTING ||
1016 m->state == MOUNT_MOUNTING_DONE ||
1017 m->state == MOUNT_MOUNTED ||
1018 m->state == MOUNT_REMOUNTING ||
1019 m->state == MOUNT_REMOUNTING_SIGTERM ||
1020 m->state == MOUNT_REMOUNTING_SIGKILL);
1022 mount_enter_unmounting(m, true);
1026 static int mount_reload(Unit *u) {
1027 Mount *m = MOUNT(u);
1031 if (m->state == MOUNT_MOUNTING_DONE)
1034 assert(m->state == MOUNT_MOUNTED);
1036 mount_enter_remounting(m, true);
1040 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1041 Mount *m = MOUNT(u);
1047 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1048 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1050 if (m->control_pid > 0)
1051 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1053 if (m->control_command_id >= 0)
1054 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1059 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1060 Mount *m = MOUNT(u);
1067 if (streq(key, "state")) {
1070 if ((state = mount_state_from_string(value)) < 0)
1071 log_debug("Failed to parse state value %s", value);
1073 m->deserialized_state = state;
1074 } else if (streq(key, "failure")) {
1077 if ((b = parse_boolean(value)) < 0)
1078 log_debug("Failed to parse failure value %s", value);
1080 m->failure = b || m->failure;
1082 } else if (streq(key, "control-pid")) {
1085 if (parse_pid(value, &pid) < 0)
1086 log_debug("Failed to parse control-pid value %s", value);
1088 m->control_pid = pid;
1089 } else if (streq(key, "control-command")) {
1090 MountExecCommand id;
1092 if ((id = mount_exec_command_from_string(value)) < 0)
1093 log_debug("Failed to parse exec-command value %s", value);
1095 m->control_command_id = id;
1096 m->control_command = m->exec_command + id;
1100 log_debug("Unknown serialization key '%s'", key);
1105 static UnitActiveState mount_active_state(Unit *u) {
1108 return state_translation_table[MOUNT(u)->state];
1111 static const char *mount_sub_state_to_string(Unit *u) {
1114 return mount_state_to_string(MOUNT(u)->state);
1117 static bool mount_check_gc(Unit *u) {
1118 Mount *m = MOUNT(u);
1122 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1125 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1126 Mount *m = MOUNT(u);
1132 if (pid != m->control_pid)
1137 success = is_clean_exit(code, status);
1138 m->failure = m->failure || !success;
1140 if (m->control_command) {
1141 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1142 m->control_command = NULL;
1143 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1146 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1147 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1149 /* Note that mount(8) returning and the kernel sending us a
1150 * mount table change event might happen out-of-order. If an
1151 * operation succeed we assume the kernel will follow soon too
1152 * and already change into the resulting state. If it fails
1153 * we check if the kernel still knows about the mount. and
1154 * change state accordingly. */
1158 case MOUNT_MOUNTING:
1159 case MOUNT_MOUNTING_DONE:
1160 case MOUNT_MOUNTING_SIGKILL:
1161 case MOUNT_MOUNTING_SIGTERM:
1164 mount_enter_mounted(m, true);
1165 else if (m->from_proc_self_mountinfo)
1166 mount_enter_mounted(m, false);
1168 mount_enter_dead(m, false);
1171 case MOUNT_REMOUNTING:
1172 case MOUNT_REMOUNTING_SIGKILL:
1173 case MOUNT_REMOUNTING_SIGTERM:
1175 m->reload_failure = !success;
1176 if (m->from_proc_self_mountinfo)
1177 mount_enter_mounted(m, true);
1179 mount_enter_dead(m, true);
1183 case MOUNT_UNMOUNTING:
1184 case MOUNT_UNMOUNTING_SIGKILL:
1185 case MOUNT_UNMOUNTING_SIGTERM:
1188 mount_enter_dead(m, true);
1189 else if (m->from_proc_self_mountinfo)
1190 mount_enter_mounted(m, false);
1192 mount_enter_dead(m, false);
1196 assert_not_reached("Uh, control process died at wrong time.");
1199 /* Notify clients about changed exit status */
1200 unit_add_to_dbus_queue(u);
1203 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1204 Mount *m = MOUNT(u);
1207 assert(elapsed == 1);
1208 assert(w == &m->timer_watch);
1212 case MOUNT_MOUNTING:
1213 case MOUNT_MOUNTING_DONE:
1214 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1215 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1218 case MOUNT_REMOUNTING:
1219 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1220 m->reload_failure = true;
1221 mount_enter_mounted(m, true);
1224 case MOUNT_UNMOUNTING:
1225 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1226 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1229 case MOUNT_MOUNTING_SIGTERM:
1230 if (m->exec_context.send_sigkill) {
1231 log_warning("%s mounting timed out. Killing.", u->meta.id);
1232 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1234 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1236 if (m->from_proc_self_mountinfo)
1237 mount_enter_mounted(m, false);
1239 mount_enter_dead(m, false);
1243 case MOUNT_REMOUNTING_SIGTERM:
1244 if (m->exec_context.send_sigkill) {
1245 log_warning("%s remounting timed out. Killing.", u->meta.id);
1246 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1248 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1250 if (m->from_proc_self_mountinfo)
1251 mount_enter_mounted(m, false);
1253 mount_enter_dead(m, false);
1257 case MOUNT_UNMOUNTING_SIGTERM:
1258 if (m->exec_context.send_sigkill) {
1259 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1260 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1262 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1264 if (m->from_proc_self_mountinfo)
1265 mount_enter_mounted(m, false);
1267 mount_enter_dead(m, false);
1271 case MOUNT_MOUNTING_SIGKILL:
1272 case MOUNT_REMOUNTING_SIGKILL:
1273 case MOUNT_UNMOUNTING_SIGKILL:
1274 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1276 if (m->from_proc_self_mountinfo)
1277 mount_enter_mounted(m, false);
1279 mount_enter_dead(m, false);
1283 assert_not_reached("Timeout at wrong time.");
1287 static int mount_add_one(
1291 const char *options,
1294 bool from_proc_self_mountinfo,
1299 char *e, *w = NULL, *o = NULL, *f = NULL;
1308 assert(!set_flags || from_proc_self_mountinfo);
1310 /* Ignore API mount points. They should never be referenced in
1311 * dependencies ever. */
1312 if (mount_point_is_api(where) || mount_point_ignore(where))
1315 if (streq(fstype, "autofs"))
1318 /* probably some kind of swap, ignore */
1319 if (!is_path(where))
1322 if (!(e = unit_name_from_path(where, ".mount")))
1325 if (!(u = manager_get_unit(m, e))) {
1328 if (!(u = unit_new(m))) {
1333 r = unit_add_name(u, e);
1339 if (!(MOUNT(u)->where = strdup(where))) {
1344 unit_add_to_load_queue(u);
1350 if (!(w = strdup(what)) ||
1351 !(o = strdup(options)) ||
1352 !(f = strdup(fstype))) {
1357 if (from_proc_self_mountinfo) {
1358 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1361 MOUNT(u)->is_mounted = true;
1362 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1363 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1366 MOUNT(u)->from_proc_self_mountinfo = true;
1368 p = &MOUNT(u)->parameters_etc_fstab;
1369 MOUNT(u)->from_etc_fstab = true;
1383 unit_add_to_dbus_queue(u);
1398 static int mount_find_pri(char *options) {
1402 if (!(pri = mount_test_option(options, "pri=")))
1408 r = strtoul(pri, &end, 10);
1413 if (end == pri || (*end != ',' && *end != 0))
1419 static int mount_load_etc_fstab(Manager *m) {
1427 if (!(f = setmntent("/etc/fstab", "r")))
1430 while ((me = getmntent(f))) {
1434 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1439 if (!(where = strdup(me->mnt_dir))) {
1446 path_kill_slashes(what);
1448 if (where[0] == '/')
1449 path_kill_slashes(where);
1451 if (streq(me->mnt_type, "swap")) {
1454 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1461 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1462 !!mount_test_option(me->mnt_opts, "nofail"),
1463 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1466 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1481 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1484 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1488 rewind(m->proc_self_mountinfo);
1493 device = path = options = options2 = fstype = d = p = o = NULL;
1495 if ((k = fscanf(m->proc_self_mountinfo,
1496 "%*s " /* (1) mount id */
1497 "%*s " /* (2) parent id */
1498 "%*s " /* (3) major:minor */
1499 "%*s " /* (4) root */
1500 "%ms " /* (5) mount point */
1501 "%ms" /* (6) mount options */
1502 "%*[^-]" /* (7) optional fields */
1503 "- " /* (8) separator */
1504 "%ms " /* (9) file system type */
1505 "%ms" /* (10) mount source */
1506 "%ms" /* (11) mount options 2 */
1507 "%*[^\n]", /* some rubbish at the end */
1517 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1521 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1526 if (!(d = cunescape(device)) ||
1527 !(p = cunescape(path))) {
1532 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1559 static void mount_shutdown(Manager *m) {
1562 if (m->proc_self_mountinfo) {
1563 fclose(m->proc_self_mountinfo);
1564 m->proc_self_mountinfo = NULL;
1568 static int mount_enumerate(Manager *m) {
1570 struct epoll_event ev;
1573 if (!m->proc_self_mountinfo) {
1574 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1577 m->mount_watch.type = WATCH_MOUNT;
1578 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1581 ev.events = EPOLLPRI;
1582 ev.data.ptr = &m->mount_watch;
1584 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1588 if ((r = mount_load_etc_fstab(m)) < 0)
1591 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1601 void mount_fd_event(Manager *m, int events) {
1606 assert(events & EPOLLPRI);
1608 /* The manager calls this for every fd event happening on the
1609 * /proc/self/mountinfo file, which informs us about mounting
1612 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1613 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1615 /* Reset flags, just in case, for later calls */
1616 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1617 Mount *mount = (Mount*) meta;
1619 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1625 manager_dispatch_load_queue(m);
1627 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1628 Mount *mount = (Mount*) meta;
1630 if (!mount->is_mounted) {
1631 /* This has just been unmounted. */
1633 mount->from_proc_self_mountinfo = false;
1635 switch (mount->state) {
1638 mount_enter_dead(mount, true);
1642 mount_set_state(mount, mount->state);
1647 } else if (mount->just_mounted || mount->just_changed) {
1649 /* New or changed mount entry */
1651 switch (mount->state) {
1655 mount_enter_mounted(mount, true);
1658 case MOUNT_MOUNTING:
1659 mount_enter_mounting_done(mount);
1663 /* Nothing really changed, but let's
1664 * issue an notification call
1665 * nonetheless, in case somebody is
1666 * waiting for this. (e.g. file system
1667 * ro/rw remounts.) */
1668 mount_set_state(mount, mount->state);
1673 /* Reset the flags for later calls */
1674 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1678 static void mount_reset_failed(Unit *u) {
1679 Mount *m = MOUNT(u);
1683 if (m->state == MOUNT_FAILED)
1684 mount_set_state(m, MOUNT_DEAD);
1689 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1690 Mount *m = MOUNT(u);
1692 Set *pid_set = NULL;
1696 if (who == KILL_MAIN) {
1697 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1701 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1702 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1706 if (m->control_pid > 0)
1707 if (kill(m->control_pid, signo) < 0)
1710 if (mode == KILL_CONTROL_GROUP) {
1713 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1716 /* Exclude the control pid from being killed via the cgroup */
1717 if (m->control_pid > 0)
1718 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1723 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1724 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1735 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1736 [MOUNT_DEAD] = "dead",
1737 [MOUNT_MOUNTING] = "mounting",
1738 [MOUNT_MOUNTING_DONE] = "mounting-done",
1739 [MOUNT_MOUNTED] = "mounted",
1740 [MOUNT_REMOUNTING] = "remounting",
1741 [MOUNT_UNMOUNTING] = "unmounting",
1742 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1743 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1744 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1745 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1746 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1747 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1748 [MOUNT_FAILED] = "failed"
1751 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1753 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1754 [MOUNT_EXEC_MOUNT] = "ExecMount",
1755 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1756 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1759 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1761 const UnitVTable mount_vtable = {
1765 .no_instances = true,
1767 .show_status = true,
1773 .coldplug = mount_coldplug,
1777 .start = mount_start,
1779 .reload = mount_reload,
1783 .serialize = mount_serialize,
1784 .deserialize_item = mount_deserialize_item,
1786 .active_state = mount_active_state,
1787 .sub_state_to_string = mount_sub_state_to_string,
1789 .check_gc = mount_check_gc,
1791 .sigchld_event = mount_sigchld_event,
1792 .timer_event = mount_timer_event,
1794 .reset_failed = mount_reset_failed,
1796 .bus_interface = "org.freedesktop.systemd1.Mount",
1797 .bus_message_handler = bus_mount_message_handler,
1798 .bus_invalidating_properties = bus_mount_invalidating_properties,
1800 .enumerate = mount_enumerate,
1801 .shutdown = mount_shutdown