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;
84 m->meta.ignore_on_isolate = true;
87 static void mount_unwatch_control_pid(Mount *m) {
90 if (m->control_pid <= 0)
93 unit_unwatch_pid(UNIT(m), m->control_pid);
97 static void mount_parameters_done(MountParameters *p) {
104 p->what = p->options = p->fstype = NULL;
107 static void mount_done(Unit *u) {
116 /* Try to detach us from the automount unit if there is any */
117 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_AUTOMOUNT]) {
118 Automount *a = (Automount*) other;
124 mount_parameters_done(&m->parameters_etc_fstab);
125 mount_parameters_done(&m->parameters_proc_self_mountinfo);
126 mount_parameters_done(&m->parameters_fragment);
128 exec_context_done(&m->exec_context);
129 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
130 m->control_command = NULL;
132 mount_unwatch_control_pid(m);
134 unit_unwatch_timer(u, &m->timer_watch);
137 static MountParameters* get_mount_parameters_configured(Mount *m) {
140 if (m->from_fragment)
141 return &m->parameters_fragment;
142 else if (m->from_etc_fstab)
143 return &m->parameters_etc_fstab;
148 static MountParameters* get_mount_parameters(Mount *m) {
151 if (m->from_proc_self_mountinfo)
152 return &m->parameters_proc_self_mountinfo;
154 return get_mount_parameters_configured(m);
157 static int mount_add_mount_links(Mount *m) {
164 pm = get_mount_parameters_configured(m);
166 /* Adds in links to other mount points that might lie below or
167 * above us in the hierarchy */
169 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_MOUNT]) {
170 Mount *n = (Mount*) other;
176 if (n->meta.load_state != UNIT_LOADED)
179 pn = get_mount_parameters_configured(n);
181 if (path_startswith(m->where, n->where)) {
183 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
187 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
190 } else if (path_startswith(n->where, m->where)) {
192 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
196 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
199 } else if (pm && path_startswith(pm->what, n->where)) {
201 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
204 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
207 } else if (pn && path_startswith(pn->what, m->where)) {
209 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
212 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
220 static int mount_add_swap_links(Mount *m) {
226 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_SWAP])
227 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
233 static int mount_add_path_links(Mount *m) {
239 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_PATH])
240 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
246 static int mount_add_automount_links(Mount *m) {
252 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_AUTOMOUNT])
253 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
259 static int mount_add_socket_links(Mount *m) {
265 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_SOCKET])
266 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
272 static char* mount_test_option(const char *haystack, const char *needle) {
277 /* Like glibc's hasmntopt(), but works on a string, not a
284 me.mnt_opts = (char*) haystack;
286 return hasmntopt(&me, needle);
289 static bool mount_is_network(MountParameters *p) {
292 if (mount_test_option(p->options, "_netdev"))
295 if (p->fstype && fstype_is_network(p->fstype))
301 static bool mount_is_bind(MountParameters *p) {
304 if (mount_test_option(p->options, "bind"))
307 if (p->fstype && streq(p->fstype, "bind"))
313 static bool needs_quota(MountParameters *p) {
316 if (mount_is_network(p))
319 if (mount_is_bind(p))
322 return mount_test_option(p->options, "usrquota") ||
323 mount_test_option(p->options, "grpquota");
326 static int mount_add_fstab_links(Mount *m) {
327 const char *target, *after = NULL;
331 bool noauto, nofail, handle, automount;
335 if (m->meta.manager->running_as != MANAGER_SYSTEM)
338 if (!(p = get_mount_parameters_configured(m)))
341 if (p != &m->parameters_etc_fstab)
344 noauto = !!mount_test_option(p->options, "noauto");
345 nofail = !!mount_test_option(p->options, "nofail");
347 mount_test_option(p->options, "comment=systemd.automount") ||
348 mount_test_option(p->options, "x-systemd-automount");
351 mount_test_option(p->options, "comment=systemd.mount") ||
352 mount_test_option(p->options, "x-systemd-mount") ||
353 m->meta.manager->mount_auto;
355 if (mount_is_network(p)) {
356 target = SPECIAL_REMOTE_FS_TARGET;
357 after = SPECIAL_NETWORK_TARGET;
359 target = SPECIAL_LOCAL_FS_TARGET;
361 if (!path_equal(m->where, "/"))
362 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
365 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
369 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
375 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
378 /* If auto is configured as well also pull in the
379 * mount right-away, but don't rely on it. */
380 if (!noauto) /* automount + auto */
381 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
384 /* Install automount unit */
385 if (!nofail) /* automount + fail */
386 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(am), true);
387 else /* automount + nofail */
388 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
390 } else if (handle && !noauto) {
392 /* Automatically add mount points that aren't natively
393 * configured to local-fs.target */
395 if (!nofail) /* auto + fail */
396 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
397 else /* auto + nofail */
398 return unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true);
404 static int mount_add_device_links(Mount *m) {
410 if (!(p = get_mount_parameters_configured(m)))
416 if (!mount_is_bind(p) &&
417 !path_equal(m->where, "/") &&
418 p == &m->parameters_etc_fstab) {
421 noauto = !!mount_test_option(p->options, "noauto");
422 nofail = !!mount_test_option(p->options, "nofail");
424 if ((r = unit_add_node_link(UNIT(m), p->what,
426 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
432 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
433 !path_equal(m->where, "/")) {
436 /* Let's add in the fsck service */
438 /* aka SPECIAL_FSCK_SERVICE */
439 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
442 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
443 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
450 SERVICE(fsck)->fsck_passno = p->passno;
452 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
459 static int mount_add_default_dependencies(Mount *m) {
464 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
465 !path_equal(m->where, "/")) {
468 p = get_mount_parameters_configured(m);
470 if (p && needs_quota(p)) {
471 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
472 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
476 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
483 static int mount_fix_timeouts(Mount *m) {
485 const char *timeout = NULL;
494 if (!(p = get_mount_parameters_configured(m)))
497 /* Allow configuration how long we wait for a device that
498 * backs a mount point to show up. This is useful to support
499 * endless device timeouts for devices that show up only after
500 * user input, like crypto devices. */
502 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
504 else if ((timeout = mount_test_option(p->options, "x-systemd-device-timeout")))
509 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
513 r = parse_usec(t, &u);
517 log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout);
521 SET_FOREACH(other, m->meta.dependencies[UNIT_AFTER], i) {
522 if (other->meta.type != UNIT_DEVICE)
525 other->meta.job_timeout = u;
531 static int mount_verify(Mount *m) {
536 if (m->meta.load_state != UNIT_LOADED)
539 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
542 if (!(e = unit_name_from_path(m->where, ".mount")))
545 b = unit_has_name(UNIT(m), e);
549 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
553 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
554 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
558 if (m->meta.fragment_path && !m->parameters_fragment.what) {
559 log_error("%s's What setting is missing. Refusing.", m->meta.id);
563 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
564 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
571 static int mount_load(Unit *u) {
576 assert(u->meta.load_state == UNIT_STUB);
578 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
581 /* This is a new unit? Then let's add in some extras */
582 if (u->meta.load_state == UNIT_LOADED) {
583 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
586 if (m->meta.fragment_path)
587 m->from_fragment = true;
588 else if (m->from_etc_fstab)
589 m->meta.default_dependencies = false;
592 if (!(m->where = unit_name_to_path(u->meta.id)))
595 path_kill_slashes(m->where);
597 if (!m->meta.description)
598 if ((r = unit_set_description(u, m->where)) < 0)
601 if ((r = mount_add_device_links(m)) < 0)
604 if ((r = mount_add_mount_links(m)) < 0)
607 if ((r = mount_add_socket_links(m)) < 0)
610 if ((r = mount_add_swap_links(m)) < 0)
613 if ((r = mount_add_path_links(m)) < 0)
616 if ((r = mount_add_automount_links(m)) < 0)
619 if ((r = mount_add_fstab_links(m)) < 0)
622 if (m->meta.default_dependencies)
623 if ((r = mount_add_default_dependencies(m)) < 0)
626 if ((r = unit_add_default_cgroups(u)) < 0)
629 mount_fix_timeouts(m);
632 return mount_verify(m);
635 static int mount_notify_automount(Mount *m, int status) {
641 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
642 return r == -ENOENT ? 0 : r;
644 return automount_send_ready(AUTOMOUNT(p), status);
647 static void mount_set_state(Mount *m, MountState state) {
648 MountState old_state;
651 old_state = m->state;
654 if (state != MOUNT_MOUNTING &&
655 state != MOUNT_MOUNTING_DONE &&
656 state != MOUNT_REMOUNTING &&
657 state != MOUNT_UNMOUNTING &&
658 state != MOUNT_MOUNTING_SIGTERM &&
659 state != MOUNT_MOUNTING_SIGKILL &&
660 state != MOUNT_UNMOUNTING_SIGTERM &&
661 state != MOUNT_UNMOUNTING_SIGKILL &&
662 state != MOUNT_REMOUNTING_SIGTERM &&
663 state != MOUNT_REMOUNTING_SIGKILL) {
664 unit_unwatch_timer(UNIT(m), &m->timer_watch);
665 mount_unwatch_control_pid(m);
666 m->control_command = NULL;
667 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
670 if (state == MOUNT_MOUNTED ||
671 state == MOUNT_REMOUNTING)
672 mount_notify_automount(m, 0);
673 else if (state == MOUNT_DEAD ||
674 state == MOUNT_UNMOUNTING ||
675 state == MOUNT_MOUNTING_SIGTERM ||
676 state == MOUNT_MOUNTING_SIGKILL ||
677 state == MOUNT_REMOUNTING_SIGTERM ||
678 state == MOUNT_REMOUNTING_SIGKILL ||
679 state == MOUNT_UNMOUNTING_SIGTERM ||
680 state == MOUNT_UNMOUNTING_SIGKILL ||
681 state == MOUNT_FAILED)
682 mount_notify_automount(m, -ENODEV);
684 if (state != old_state)
685 log_debug("%s changed %s -> %s",
687 mount_state_to_string(old_state),
688 mount_state_to_string(state));
690 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
691 m->reload_failure = false;
694 static int mount_coldplug(Unit *u) {
696 MountState new_state = MOUNT_DEAD;
700 assert(m->state == MOUNT_DEAD);
702 if (m->deserialized_state != m->state)
703 new_state = m->deserialized_state;
704 else if (m->from_proc_self_mountinfo)
705 new_state = MOUNT_MOUNTED;
707 if (new_state != m->state) {
709 if (new_state == MOUNT_MOUNTING ||
710 new_state == MOUNT_MOUNTING_DONE ||
711 new_state == MOUNT_REMOUNTING ||
712 new_state == MOUNT_UNMOUNTING ||
713 new_state == MOUNT_MOUNTING_SIGTERM ||
714 new_state == MOUNT_MOUNTING_SIGKILL ||
715 new_state == MOUNT_UNMOUNTING_SIGTERM ||
716 new_state == MOUNT_UNMOUNTING_SIGKILL ||
717 new_state == MOUNT_REMOUNTING_SIGTERM ||
718 new_state == MOUNT_REMOUNTING_SIGKILL) {
720 if (m->control_pid <= 0)
723 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
726 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
730 mount_set_state(m, new_state);
736 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
743 p = get_mount_parameters(m);
746 "%sMount State: %s\n"
749 "%sFile System Type: %s\n"
751 "%sFrom /etc/fstab: %s\n"
752 "%sFrom /proc/self/mountinfo: %s\n"
753 "%sFrom fragment: %s\n"
754 "%sDirectoryMode: %04o\n",
755 prefix, mount_state_to_string(m->state),
757 prefix, strna(p->what),
758 prefix, strna(p->fstype),
759 prefix, strna(p->options),
760 prefix, yes_no(m->from_etc_fstab),
761 prefix, yes_no(m->from_proc_self_mountinfo),
762 prefix, yes_no(m->from_fragment),
763 prefix, m->directory_mode);
765 if (m->control_pid > 0)
767 "%sControl PID: %lu\n",
768 prefix, (unsigned long) m->control_pid);
770 exec_context_dump(&m->exec_context, f, prefix);
773 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
781 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
784 if ((r = exec_spawn(c,
788 m->meta.manager->environment,
792 m->meta.manager->confirm_spawn,
793 m->meta.cgroup_bondings,
794 m->meta.cgroup_attributes,
798 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
799 /* FIXME: we need to do something here */
807 unit_unwatch_timer(UNIT(m), &m->timer_watch);
812 static void mount_enter_dead(Mount *m, bool success) {
818 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
821 static void mount_enter_mounted(Mount *m, bool success) {
827 mount_set_state(m, MOUNT_MOUNTED);
830 static void mount_enter_signal(Mount *m, MountState state, bool success) {
833 bool wait_for_exit = false;
840 if (m->exec_context.kill_mode != KILL_NONE) {
841 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
842 state == MOUNT_UNMOUNTING_SIGTERM ||
843 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
845 if (m->control_pid > 0) {
846 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
848 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
850 wait_for_exit = true;
853 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
855 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
860 /* Exclude the control pid from being killed via the cgroup */
861 if (m->control_pid > 0)
862 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
865 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
866 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
867 log_warning("Failed to kill control group: %s", strerror(-r));
869 wait_for_exit = true;
877 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
880 mount_set_state(m, state);
881 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
882 mount_enter_mounted(m, true);
884 mount_enter_dead(m, true);
889 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
891 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
892 mount_enter_mounted(m, false);
894 mount_enter_dead(m, false);
900 static void mount_enter_unmounting(Mount *m, bool success) {
908 m->control_command_id = MOUNT_EXEC_UNMOUNT;
909 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
911 if ((r = exec_command_set(
918 mount_unwatch_control_pid(m);
920 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
923 mount_set_state(m, MOUNT_UNMOUNTING);
928 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
929 mount_enter_mounted(m, false);
932 static void mount_enter_mounting(Mount *m) {
938 m->control_command_id = MOUNT_EXEC_MOUNT;
939 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
941 mkdir_p(m->where, m->directory_mode);
943 /* Create the source directory for bind-mounts if needed */
944 p = get_mount_parameters_configured(m);
945 if (p && mount_is_bind(p))
946 mkdir_p(p->what, m->directory_mode);
948 if (m->from_fragment)
949 r = exec_command_set(
952 m->parameters_fragment.what,
954 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
955 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
957 else if (m->from_etc_fstab)
958 r = exec_command_set(
969 mount_unwatch_control_pid(m);
971 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
974 mount_set_state(m, MOUNT_MOUNTING);
979 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
980 mount_enter_dead(m, false);
983 static void mount_enter_mounting_done(Mount *m) {
986 mount_set_state(m, MOUNT_MOUNTING_DONE);
989 static void mount_enter_remounting(Mount *m, bool success) {
997 m->control_command_id = MOUNT_EXEC_REMOUNT;
998 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
1000 if (m->from_fragment) {
1004 if (m->parameters_fragment.options) {
1005 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
1014 r = exec_command_set(
1017 m->parameters_fragment.what,
1019 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1024 } else if (m->from_etc_fstab)
1025 r = exec_command_set(
1037 mount_unwatch_control_pid(m);
1039 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
1042 mount_set_state(m, MOUNT_REMOUNTING);
1047 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
1048 m->reload_failure = true;
1049 mount_enter_mounted(m, true);
1052 static int mount_start(Unit *u) {
1053 Mount *m = MOUNT(u);
1057 /* We cannot fulfill this request right now, try again later
1059 if (m->state == MOUNT_UNMOUNTING ||
1060 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1061 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1062 m->state == MOUNT_MOUNTING_SIGTERM ||
1063 m->state == MOUNT_MOUNTING_SIGKILL)
1066 /* Already on it! */
1067 if (m->state == MOUNT_MOUNTING)
1070 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1073 mount_enter_mounting(m);
1077 static int mount_stop(Unit *u) {
1078 Mount *m = MOUNT(u);
1083 if (m->state == MOUNT_UNMOUNTING ||
1084 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1085 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1086 m->state == MOUNT_MOUNTING_SIGTERM ||
1087 m->state == MOUNT_MOUNTING_SIGKILL)
1090 assert(m->state == MOUNT_MOUNTING ||
1091 m->state == MOUNT_MOUNTING_DONE ||
1092 m->state == MOUNT_MOUNTED ||
1093 m->state == MOUNT_REMOUNTING ||
1094 m->state == MOUNT_REMOUNTING_SIGTERM ||
1095 m->state == MOUNT_REMOUNTING_SIGKILL);
1097 mount_enter_unmounting(m, true);
1101 static int mount_reload(Unit *u) {
1102 Mount *m = MOUNT(u);
1106 if (m->state == MOUNT_MOUNTING_DONE)
1109 assert(m->state == MOUNT_MOUNTED);
1111 mount_enter_remounting(m, true);
1115 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1116 Mount *m = MOUNT(u);
1122 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1123 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1125 if (m->control_pid > 0)
1126 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1128 if (m->control_command_id >= 0)
1129 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1134 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1135 Mount *m = MOUNT(u);
1142 if (streq(key, "state")) {
1145 if ((state = mount_state_from_string(value)) < 0)
1146 log_debug("Failed to parse state value %s", value);
1148 m->deserialized_state = state;
1149 } else if (streq(key, "failure")) {
1152 if ((b = parse_boolean(value)) < 0)
1153 log_debug("Failed to parse failure value %s", value);
1155 m->failure = b || m->failure;
1157 } else if (streq(key, "control-pid")) {
1160 if (parse_pid(value, &pid) < 0)
1161 log_debug("Failed to parse control-pid value %s", value);
1163 m->control_pid = pid;
1164 } else if (streq(key, "control-command")) {
1165 MountExecCommand id;
1167 if ((id = mount_exec_command_from_string(value)) < 0)
1168 log_debug("Failed to parse exec-command value %s", value);
1170 m->control_command_id = id;
1171 m->control_command = m->exec_command + id;
1175 log_debug("Unknown serialization key '%s'", key);
1180 static UnitActiveState mount_active_state(Unit *u) {
1183 return state_translation_table[MOUNT(u)->state];
1186 static const char *mount_sub_state_to_string(Unit *u) {
1189 return mount_state_to_string(MOUNT(u)->state);
1192 static bool mount_check_gc(Unit *u) {
1193 Mount *m = MOUNT(u);
1197 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1200 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1201 Mount *m = MOUNT(u);
1207 if (pid != m->control_pid)
1212 success = is_clean_exit(code, status);
1213 m->failure = m->failure || !success;
1215 if (m->control_command) {
1216 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1217 m->control_command = NULL;
1218 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1221 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1222 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1224 /* Note that mount(8) returning and the kernel sending us a
1225 * mount table change event might happen out-of-order. If an
1226 * operation succeed we assume the kernel will follow soon too
1227 * and already change into the resulting state. If it fails
1228 * we check if the kernel still knows about the mount. and
1229 * change state accordingly. */
1233 case MOUNT_MOUNTING:
1234 case MOUNT_MOUNTING_DONE:
1235 case MOUNT_MOUNTING_SIGKILL:
1236 case MOUNT_MOUNTING_SIGTERM:
1239 mount_enter_mounted(m, true);
1240 else if (m->from_proc_self_mountinfo)
1241 mount_enter_mounted(m, false);
1243 mount_enter_dead(m, false);
1246 case MOUNT_REMOUNTING:
1247 case MOUNT_REMOUNTING_SIGKILL:
1248 case MOUNT_REMOUNTING_SIGTERM:
1250 m->reload_failure = !success;
1251 if (m->from_proc_self_mountinfo)
1252 mount_enter_mounted(m, true);
1254 mount_enter_dead(m, true);
1258 case MOUNT_UNMOUNTING:
1259 case MOUNT_UNMOUNTING_SIGKILL:
1260 case MOUNT_UNMOUNTING_SIGTERM:
1263 mount_enter_dead(m, true);
1264 else if (m->from_proc_self_mountinfo)
1265 mount_enter_mounted(m, false);
1267 mount_enter_dead(m, false);
1271 assert_not_reached("Uh, control process died at wrong time.");
1274 /* Notify clients about changed exit status */
1275 unit_add_to_dbus_queue(u);
1278 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1279 Mount *m = MOUNT(u);
1282 assert(elapsed == 1);
1283 assert(w == &m->timer_watch);
1287 case MOUNT_MOUNTING:
1288 case MOUNT_MOUNTING_DONE:
1289 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1290 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1293 case MOUNT_REMOUNTING:
1294 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1295 m->reload_failure = true;
1296 mount_enter_mounted(m, true);
1299 case MOUNT_UNMOUNTING:
1300 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1301 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1304 case MOUNT_MOUNTING_SIGTERM:
1305 if (m->exec_context.send_sigkill) {
1306 log_warning("%s mounting timed out. Killing.", u->meta.id);
1307 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1309 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1311 if (m->from_proc_self_mountinfo)
1312 mount_enter_mounted(m, false);
1314 mount_enter_dead(m, false);
1318 case MOUNT_REMOUNTING_SIGTERM:
1319 if (m->exec_context.send_sigkill) {
1320 log_warning("%s remounting timed out. Killing.", u->meta.id);
1321 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1323 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1325 if (m->from_proc_self_mountinfo)
1326 mount_enter_mounted(m, false);
1328 mount_enter_dead(m, false);
1332 case MOUNT_UNMOUNTING_SIGTERM:
1333 if (m->exec_context.send_sigkill) {
1334 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1335 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1337 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1339 if (m->from_proc_self_mountinfo)
1340 mount_enter_mounted(m, false);
1342 mount_enter_dead(m, false);
1346 case MOUNT_MOUNTING_SIGKILL:
1347 case MOUNT_REMOUNTING_SIGKILL:
1348 case MOUNT_UNMOUNTING_SIGKILL:
1349 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1351 if (m->from_proc_self_mountinfo)
1352 mount_enter_mounted(m, false);
1354 mount_enter_dead(m, false);
1358 assert_not_reached("Timeout at wrong time.");
1362 static int mount_add_one(
1366 const char *options,
1369 bool from_proc_self_mountinfo,
1374 char *e, *w = NULL, *o = NULL, *f = NULL;
1383 assert(!set_flags || from_proc_self_mountinfo);
1385 /* Ignore API mount points. They should never be referenced in
1386 * dependencies ever. */
1387 if (mount_point_is_api(where) || mount_point_ignore(where))
1390 if (streq(fstype, "autofs"))
1393 /* probably some kind of swap, ignore */
1394 if (!is_path(where))
1397 if (!(e = unit_name_from_path(where, ".mount")))
1400 if (!(u = manager_get_unit(m, e))) {
1403 if (!(u = unit_new(m))) {
1408 r = unit_add_name(u, e);
1414 if (!(MOUNT(u)->where = strdup(where))) {
1419 unit_add_to_load_queue(u);
1425 if (!(w = strdup(what)) ||
1426 !(o = strdup(options)) ||
1427 !(f = strdup(fstype))) {
1432 if (from_proc_self_mountinfo) {
1433 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1436 MOUNT(u)->is_mounted = true;
1437 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1438 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1441 MOUNT(u)->from_proc_self_mountinfo = true;
1443 p = &MOUNT(u)->parameters_etc_fstab;
1444 MOUNT(u)->from_etc_fstab = true;
1458 unit_add_to_dbus_queue(u);
1473 static int mount_find_pri(char *options) {
1477 if (!(pri = mount_test_option(options, "pri")))
1483 r = strtoul(pri, &end, 10);
1488 if (end == pri || (*end != ',' && *end != 0))
1494 static int mount_load_etc_fstab(Manager *m) {
1502 if (!(f = setmntent("/etc/fstab", "r")))
1505 while ((me = getmntent(f))) {
1509 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1514 if (!(where = strdup(me->mnt_dir))) {
1521 path_kill_slashes(what);
1523 if (where[0] == '/')
1524 path_kill_slashes(where);
1526 if (streq(me->mnt_type, "swap")) {
1529 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1536 !!mount_test_option(me->mnt_opts, "noauto"),
1537 !!mount_test_option(me->mnt_opts, "nofail"),
1538 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1541 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1556 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1559 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1563 rewind(m->proc_self_mountinfo);
1568 device = path = options = options2 = fstype = d = p = o = NULL;
1570 if ((k = fscanf(m->proc_self_mountinfo,
1571 "%*s " /* (1) mount id */
1572 "%*s " /* (2) parent id */
1573 "%*s " /* (3) major:minor */
1574 "%*s " /* (4) root */
1575 "%ms " /* (5) mount point */
1576 "%ms" /* (6) mount options */
1577 "%*[^-]" /* (7) optional fields */
1578 "- " /* (8) separator */
1579 "%ms " /* (9) file system type */
1580 "%ms" /* (10) mount source */
1581 "%ms" /* (11) mount options 2 */
1582 "%*[^\n]", /* some rubbish at the end */
1592 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1596 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1601 if (!(d = cunescape(device)) ||
1602 !(p = cunescape(path))) {
1607 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1634 static void mount_shutdown(Manager *m) {
1637 if (m->proc_self_mountinfo) {
1638 fclose(m->proc_self_mountinfo);
1639 m->proc_self_mountinfo = NULL;
1643 static int mount_enumerate(Manager *m) {
1645 struct epoll_event ev;
1648 if (!m->proc_self_mountinfo) {
1649 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1652 m->mount_watch.type = WATCH_MOUNT;
1653 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1656 ev.events = EPOLLPRI;
1657 ev.data.ptr = &m->mount_watch;
1659 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1663 if ((r = mount_load_etc_fstab(m)) < 0)
1666 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1676 void mount_fd_event(Manager *m, int events) {
1681 assert(events & EPOLLPRI);
1683 /* The manager calls this for every fd event happening on the
1684 * /proc/self/mountinfo file, which informs us about mounting
1687 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1688 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1690 /* Reset flags, just in case, for later calls */
1691 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1692 Mount *mount = (Mount*) meta;
1694 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1700 manager_dispatch_load_queue(m);
1702 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1703 Mount *mount = (Mount*) meta;
1705 if (!mount->is_mounted) {
1706 /* This has just been unmounted. */
1708 mount->from_proc_self_mountinfo = false;
1710 switch (mount->state) {
1713 mount_enter_dead(mount, true);
1717 mount_set_state(mount, mount->state);
1722 } else if (mount->just_mounted || mount->just_changed) {
1724 /* New or changed mount entry */
1726 switch (mount->state) {
1730 mount_enter_mounted(mount, true);
1733 case MOUNT_MOUNTING:
1734 mount_enter_mounting_done(mount);
1738 /* Nothing really changed, but let's
1739 * issue an notification call
1740 * nonetheless, in case somebody is
1741 * waiting for this. (e.g. file system
1742 * ro/rw remounts.) */
1743 mount_set_state(mount, mount->state);
1748 /* Reset the flags for later calls */
1749 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1753 static void mount_reset_failed(Unit *u) {
1754 Mount *m = MOUNT(u);
1758 if (m->state == MOUNT_FAILED)
1759 mount_set_state(m, MOUNT_DEAD);
1764 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1765 Mount *m = MOUNT(u);
1767 Set *pid_set = NULL;
1771 if (who == KILL_MAIN) {
1772 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1776 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1777 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1781 if (who == KILL_CONTROL || who == KILL_ALL)
1782 if (m->control_pid > 0)
1783 if (kill(m->control_pid, signo) < 0)
1786 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
1789 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1792 /* Exclude the control pid from being killed via the cgroup */
1793 if (m->control_pid > 0)
1794 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1799 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1800 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
1811 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1812 [MOUNT_DEAD] = "dead",
1813 [MOUNT_MOUNTING] = "mounting",
1814 [MOUNT_MOUNTING_DONE] = "mounting-done",
1815 [MOUNT_MOUNTED] = "mounted",
1816 [MOUNT_REMOUNTING] = "remounting",
1817 [MOUNT_UNMOUNTING] = "unmounting",
1818 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1819 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1820 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1821 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1822 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1823 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1824 [MOUNT_FAILED] = "failed"
1827 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1829 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1830 [MOUNT_EXEC_MOUNT] = "ExecMount",
1831 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1832 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1835 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1837 const UnitVTable mount_vtable = {
1845 .no_instances = true,
1846 .show_status = true,
1852 .coldplug = mount_coldplug,
1856 .start = mount_start,
1858 .reload = mount_reload,
1862 .serialize = mount_serialize,
1863 .deserialize_item = mount_deserialize_item,
1865 .active_state = mount_active_state,
1866 .sub_state_to_string = mount_sub_state_to_string,
1868 .check_gc = mount_check_gc,
1870 .sigchld_event = mount_sigchld_event,
1871 .timer_event = mount_timer_event,
1873 .reset_failed = mount_reset_failed,
1875 .bus_interface = "org.freedesktop.systemd1.Mount",
1876 .bus_message_handler = bus_mount_message_handler,
1877 .bus_invalidating_properties = bus_mount_invalidating_properties,
1879 .enumerate = mount_enumerate,
1880 .shutdown = mount_shutdown