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,
797 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
798 /* FIXME: we need to do something here */
806 unit_unwatch_timer(UNIT(m), &m->timer_watch);
811 static void mount_enter_dead(Mount *m, bool success) {
817 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
820 static void mount_enter_mounted(Mount *m, bool success) {
826 mount_set_state(m, MOUNT_MOUNTED);
829 static void mount_enter_signal(Mount *m, MountState state, bool success) {
832 bool wait_for_exit = false;
839 if (m->exec_context.kill_mode != KILL_NONE) {
840 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
841 state == MOUNT_UNMOUNTING_SIGTERM ||
842 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
844 if (m->control_pid > 0) {
845 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
847 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
849 wait_for_exit = true;
852 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
854 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
859 /* Exclude the control pid from being killed via the cgroup */
860 if (m->control_pid > 0)
861 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
864 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
865 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
866 log_warning("Failed to kill control group: %s", strerror(-r));
868 wait_for_exit = true;
876 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
879 mount_set_state(m, state);
880 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
881 mount_enter_mounted(m, true);
883 mount_enter_dead(m, true);
888 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
890 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
891 mount_enter_mounted(m, false);
893 mount_enter_dead(m, false);
899 static void mount_enter_unmounting(Mount *m, bool success) {
907 m->control_command_id = MOUNT_EXEC_UNMOUNT;
908 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
910 if ((r = exec_command_set(
917 mount_unwatch_control_pid(m);
919 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
922 mount_set_state(m, MOUNT_UNMOUNTING);
927 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
928 mount_enter_mounted(m, false);
931 static void mount_enter_mounting(Mount *m) {
937 m->control_command_id = MOUNT_EXEC_MOUNT;
938 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
940 mkdir_p(m->where, m->directory_mode);
942 /* Create the source directory for bind-mounts if needed */
943 p = get_mount_parameters_configured(m);
944 if (p && mount_is_bind(p))
945 mkdir_p(p->what, m->directory_mode);
947 if (m->from_fragment)
948 r = exec_command_set(
951 m->parameters_fragment.what,
953 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
954 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
956 else if (m->from_etc_fstab)
957 r = exec_command_set(
968 mount_unwatch_control_pid(m);
970 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
973 mount_set_state(m, MOUNT_MOUNTING);
978 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
979 mount_enter_dead(m, false);
982 static void mount_enter_mounting_done(Mount *m) {
985 mount_set_state(m, MOUNT_MOUNTING_DONE);
988 static void mount_enter_remounting(Mount *m, bool success) {
996 m->control_command_id = MOUNT_EXEC_REMOUNT;
997 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
999 if (m->from_fragment) {
1003 if (m->parameters_fragment.options) {
1004 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
1013 r = exec_command_set(
1016 m->parameters_fragment.what,
1018 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1023 } else if (m->from_etc_fstab)
1024 r = exec_command_set(
1036 mount_unwatch_control_pid(m);
1038 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
1041 mount_set_state(m, MOUNT_REMOUNTING);
1046 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
1047 m->reload_failure = true;
1048 mount_enter_mounted(m, true);
1051 static int mount_start(Unit *u) {
1052 Mount *m = MOUNT(u);
1056 /* We cannot fulfill this request right now, try again later
1058 if (m->state == MOUNT_UNMOUNTING ||
1059 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1060 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1061 m->state == MOUNT_MOUNTING_SIGTERM ||
1062 m->state == MOUNT_MOUNTING_SIGKILL)
1065 /* Already on it! */
1066 if (m->state == MOUNT_MOUNTING)
1069 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1072 mount_enter_mounting(m);
1076 static int mount_stop(Unit *u) {
1077 Mount *m = MOUNT(u);
1082 if (m->state == MOUNT_UNMOUNTING ||
1083 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1084 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1085 m->state == MOUNT_MOUNTING_SIGTERM ||
1086 m->state == MOUNT_MOUNTING_SIGKILL)
1089 assert(m->state == MOUNT_MOUNTING ||
1090 m->state == MOUNT_MOUNTING_DONE ||
1091 m->state == MOUNT_MOUNTED ||
1092 m->state == MOUNT_REMOUNTING ||
1093 m->state == MOUNT_REMOUNTING_SIGTERM ||
1094 m->state == MOUNT_REMOUNTING_SIGKILL);
1096 mount_enter_unmounting(m, true);
1100 static int mount_reload(Unit *u) {
1101 Mount *m = MOUNT(u);
1105 if (m->state == MOUNT_MOUNTING_DONE)
1108 assert(m->state == MOUNT_MOUNTED);
1110 mount_enter_remounting(m, true);
1114 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1115 Mount *m = MOUNT(u);
1121 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1122 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1124 if (m->control_pid > 0)
1125 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1127 if (m->control_command_id >= 0)
1128 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1133 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1134 Mount *m = MOUNT(u);
1141 if (streq(key, "state")) {
1144 if ((state = mount_state_from_string(value)) < 0)
1145 log_debug("Failed to parse state value %s", value);
1147 m->deserialized_state = state;
1148 } else if (streq(key, "failure")) {
1151 if ((b = parse_boolean(value)) < 0)
1152 log_debug("Failed to parse failure value %s", value);
1154 m->failure = b || m->failure;
1156 } else if (streq(key, "control-pid")) {
1159 if (parse_pid(value, &pid) < 0)
1160 log_debug("Failed to parse control-pid value %s", value);
1162 m->control_pid = pid;
1163 } else if (streq(key, "control-command")) {
1164 MountExecCommand id;
1166 if ((id = mount_exec_command_from_string(value)) < 0)
1167 log_debug("Failed to parse exec-command value %s", value);
1169 m->control_command_id = id;
1170 m->control_command = m->exec_command + id;
1174 log_debug("Unknown serialization key '%s'", key);
1179 static UnitActiveState mount_active_state(Unit *u) {
1182 return state_translation_table[MOUNT(u)->state];
1185 static const char *mount_sub_state_to_string(Unit *u) {
1188 return mount_state_to_string(MOUNT(u)->state);
1191 static bool mount_check_gc(Unit *u) {
1192 Mount *m = MOUNT(u);
1196 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1199 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1200 Mount *m = MOUNT(u);
1206 if (pid != m->control_pid)
1211 success = is_clean_exit(code, status);
1212 m->failure = m->failure || !success;
1214 if (m->control_command) {
1215 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1216 m->control_command = NULL;
1217 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1220 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1221 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1223 /* Note that mount(8) returning and the kernel sending us a
1224 * mount table change event might happen out-of-order. If an
1225 * operation succeed we assume the kernel will follow soon too
1226 * and already change into the resulting state. If it fails
1227 * we check if the kernel still knows about the mount. and
1228 * change state accordingly. */
1232 case MOUNT_MOUNTING:
1233 case MOUNT_MOUNTING_DONE:
1234 case MOUNT_MOUNTING_SIGKILL:
1235 case MOUNT_MOUNTING_SIGTERM:
1238 mount_enter_mounted(m, true);
1239 else if (m->from_proc_self_mountinfo)
1240 mount_enter_mounted(m, false);
1242 mount_enter_dead(m, false);
1245 case MOUNT_REMOUNTING:
1246 case MOUNT_REMOUNTING_SIGKILL:
1247 case MOUNT_REMOUNTING_SIGTERM:
1249 m->reload_failure = !success;
1250 if (m->from_proc_self_mountinfo)
1251 mount_enter_mounted(m, true);
1253 mount_enter_dead(m, true);
1257 case MOUNT_UNMOUNTING:
1258 case MOUNT_UNMOUNTING_SIGKILL:
1259 case MOUNT_UNMOUNTING_SIGTERM:
1262 mount_enter_dead(m, true);
1263 else if (m->from_proc_self_mountinfo)
1264 mount_enter_mounted(m, false);
1266 mount_enter_dead(m, false);
1270 assert_not_reached("Uh, control process died at wrong time.");
1273 /* Notify clients about changed exit status */
1274 unit_add_to_dbus_queue(u);
1277 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1278 Mount *m = MOUNT(u);
1281 assert(elapsed == 1);
1282 assert(w == &m->timer_watch);
1286 case MOUNT_MOUNTING:
1287 case MOUNT_MOUNTING_DONE:
1288 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1289 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1292 case MOUNT_REMOUNTING:
1293 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1294 m->reload_failure = true;
1295 mount_enter_mounted(m, true);
1298 case MOUNT_UNMOUNTING:
1299 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1300 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1303 case MOUNT_MOUNTING_SIGTERM:
1304 if (m->exec_context.send_sigkill) {
1305 log_warning("%s mounting timed out. Killing.", u->meta.id);
1306 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1308 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1310 if (m->from_proc_self_mountinfo)
1311 mount_enter_mounted(m, false);
1313 mount_enter_dead(m, false);
1317 case MOUNT_REMOUNTING_SIGTERM:
1318 if (m->exec_context.send_sigkill) {
1319 log_warning("%s remounting timed out. Killing.", u->meta.id);
1320 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1322 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1324 if (m->from_proc_self_mountinfo)
1325 mount_enter_mounted(m, false);
1327 mount_enter_dead(m, false);
1331 case MOUNT_UNMOUNTING_SIGTERM:
1332 if (m->exec_context.send_sigkill) {
1333 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1334 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1336 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1338 if (m->from_proc_self_mountinfo)
1339 mount_enter_mounted(m, false);
1341 mount_enter_dead(m, false);
1345 case MOUNT_MOUNTING_SIGKILL:
1346 case MOUNT_REMOUNTING_SIGKILL:
1347 case MOUNT_UNMOUNTING_SIGKILL:
1348 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1350 if (m->from_proc_self_mountinfo)
1351 mount_enter_mounted(m, false);
1353 mount_enter_dead(m, false);
1357 assert_not_reached("Timeout at wrong time.");
1361 static int mount_add_one(
1365 const char *options,
1368 bool from_proc_self_mountinfo,
1373 char *e, *w = NULL, *o = NULL, *f = NULL;
1382 assert(!set_flags || from_proc_self_mountinfo);
1384 /* Ignore API mount points. They should never be referenced in
1385 * dependencies ever. */
1386 if (mount_point_is_api(where) || mount_point_ignore(where))
1389 if (streq(fstype, "autofs"))
1392 /* probably some kind of swap, ignore */
1393 if (!is_path(where))
1396 if (!(e = unit_name_from_path(where, ".mount")))
1399 if (!(u = manager_get_unit(m, e))) {
1402 if (!(u = unit_new(m))) {
1407 r = unit_add_name(u, e);
1413 if (!(MOUNT(u)->where = strdup(where))) {
1418 unit_add_to_load_queue(u);
1424 if (!(w = strdup(what)) ||
1425 !(o = strdup(options)) ||
1426 !(f = strdup(fstype))) {
1431 if (from_proc_self_mountinfo) {
1432 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1435 MOUNT(u)->is_mounted = true;
1436 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1437 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1440 MOUNT(u)->from_proc_self_mountinfo = true;
1442 p = &MOUNT(u)->parameters_etc_fstab;
1443 MOUNT(u)->from_etc_fstab = true;
1457 unit_add_to_dbus_queue(u);
1472 static int mount_find_pri(char *options) {
1476 if (!(pri = mount_test_option(options, "pri=")))
1482 r = strtoul(pri, &end, 10);
1487 if (end == pri || (*end != ',' && *end != 0))
1493 static int mount_load_etc_fstab(Manager *m) {
1501 if (!(f = setmntent("/etc/fstab", "r")))
1504 while ((me = getmntent(f))) {
1508 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1513 if (!(where = strdup(me->mnt_dir))) {
1520 path_kill_slashes(what);
1522 if (where[0] == '/')
1523 path_kill_slashes(where);
1525 if (streq(me->mnt_type, "swap")) {
1528 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1535 !!mount_test_option(me->mnt_opts, "noauto"),
1536 !!mount_test_option(me->mnt_opts, "nofail"),
1537 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1540 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1555 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1558 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1562 rewind(m->proc_self_mountinfo);
1567 device = path = options = options2 = fstype = d = p = o = NULL;
1569 if ((k = fscanf(m->proc_self_mountinfo,
1570 "%*s " /* (1) mount id */
1571 "%*s " /* (2) parent id */
1572 "%*s " /* (3) major:minor */
1573 "%*s " /* (4) root */
1574 "%ms " /* (5) mount point */
1575 "%ms" /* (6) mount options */
1576 "%*[^-]" /* (7) optional fields */
1577 "- " /* (8) separator */
1578 "%ms " /* (9) file system type */
1579 "%ms" /* (10) mount source */
1580 "%ms" /* (11) mount options 2 */
1581 "%*[^\n]", /* some rubbish at the end */
1591 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1595 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1600 if (!(d = cunescape(device)) ||
1601 !(p = cunescape(path))) {
1606 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1633 static void mount_shutdown(Manager *m) {
1636 if (m->proc_self_mountinfo) {
1637 fclose(m->proc_self_mountinfo);
1638 m->proc_self_mountinfo = NULL;
1642 static int mount_enumerate(Manager *m) {
1644 struct epoll_event ev;
1647 if (!m->proc_self_mountinfo) {
1648 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1651 m->mount_watch.type = WATCH_MOUNT;
1652 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1655 ev.events = EPOLLPRI;
1656 ev.data.ptr = &m->mount_watch;
1658 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1662 if ((r = mount_load_etc_fstab(m)) < 0)
1665 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1675 void mount_fd_event(Manager *m, int events) {
1680 assert(events & EPOLLPRI);
1682 /* The manager calls this for every fd event happening on the
1683 * /proc/self/mountinfo file, which informs us about mounting
1686 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1687 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1689 /* Reset flags, just in case, for later calls */
1690 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1691 Mount *mount = (Mount*) meta;
1693 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1699 manager_dispatch_load_queue(m);
1701 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1702 Mount *mount = (Mount*) meta;
1704 if (!mount->is_mounted) {
1705 /* This has just been unmounted. */
1707 mount->from_proc_self_mountinfo = false;
1709 switch (mount->state) {
1712 mount_enter_dead(mount, true);
1716 mount_set_state(mount, mount->state);
1721 } else if (mount->just_mounted || mount->just_changed) {
1723 /* New or changed mount entry */
1725 switch (mount->state) {
1729 mount_enter_mounted(mount, true);
1732 case MOUNT_MOUNTING:
1733 mount_enter_mounting_done(mount);
1737 /* Nothing really changed, but let's
1738 * issue an notification call
1739 * nonetheless, in case somebody is
1740 * waiting for this. (e.g. file system
1741 * ro/rw remounts.) */
1742 mount_set_state(mount, mount->state);
1747 /* Reset the flags for later calls */
1748 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1752 static void mount_reset_failed(Unit *u) {
1753 Mount *m = MOUNT(u);
1757 if (m->state == MOUNT_FAILED)
1758 mount_set_state(m, MOUNT_DEAD);
1763 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1764 Mount *m = MOUNT(u);
1766 Set *pid_set = NULL;
1770 if (who == KILL_MAIN) {
1771 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1775 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1776 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1780 if (who == KILL_CONTROL || who == KILL_ALL)
1781 if (m->control_pid > 0)
1782 if (kill(m->control_pid, signo) < 0)
1785 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
1788 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1791 /* Exclude the control pid from being killed via the cgroup */
1792 if (m->control_pid > 0)
1793 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1798 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1799 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
1810 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1811 [MOUNT_DEAD] = "dead",
1812 [MOUNT_MOUNTING] = "mounting",
1813 [MOUNT_MOUNTING_DONE] = "mounting-done",
1814 [MOUNT_MOUNTED] = "mounted",
1815 [MOUNT_REMOUNTING] = "remounting",
1816 [MOUNT_UNMOUNTING] = "unmounting",
1817 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1818 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1819 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1820 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1821 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1822 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1823 [MOUNT_FAILED] = "failed"
1826 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1828 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1829 [MOUNT_EXEC_MOUNT] = "ExecMount",
1830 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1831 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1834 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1836 const UnitVTable mount_vtable = {
1840 .no_instances = true,
1841 .show_status = true,
1847 .coldplug = mount_coldplug,
1851 .start = mount_start,
1853 .reload = mount_reload,
1857 .serialize = mount_serialize,
1858 .deserialize_item = mount_deserialize_item,
1860 .active_state = mount_active_state,
1861 .sub_state_to_string = mount_sub_state_to_string,
1863 .check_gc = mount_check_gc,
1865 .sigchld_event = mount_sigchld_event,
1866 .timer_event = mount_timer_event,
1868 .reset_failed = mount_reset_failed,
1870 .bus_interface = "org.freedesktop.systemd1.Mount",
1871 .bus_message_handler = bus_mount_message_handler,
1872 .bus_invalidating_properties = bus_mount_invalidating_properties,
1874 .enumerate = mount_enumerate,
1875 .shutdown = mount_shutdown