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 = u->meta.manager->default_std_output;
73 m->exec_context.std_error = u->meta.manager->default_std_error;
76 /* We need to make sure that /bin/mount is always called in
77 * the same process group as us, so that the autofs kernel
78 * side doesn't send us another mount request while we are
79 * already trying to comply its last one. */
80 m->exec_context.same_pgrp = true;
82 m->timer_watch.type = WATCH_INVALID;
84 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
86 m->meta.ignore_on_isolate = true;
89 static void mount_unwatch_control_pid(Mount *m) {
92 if (m->control_pid <= 0)
95 unit_unwatch_pid(UNIT(m), m->control_pid);
99 static void mount_parameters_done(MountParameters *p) {
106 p->what = p->options = p->fstype = NULL;
109 static void mount_done(Unit *u) {
117 mount_parameters_done(&m->parameters_etc_fstab);
118 mount_parameters_done(&m->parameters_proc_self_mountinfo);
119 mount_parameters_done(&m->parameters_fragment);
121 exec_context_done(&m->exec_context);
122 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
123 m->control_command = NULL;
125 mount_unwatch_control_pid(m);
127 unit_unwatch_timer(u, &m->timer_watch);
130 static MountParameters* get_mount_parameters_configured(Mount *m) {
133 if (m->from_fragment)
134 return &m->parameters_fragment;
135 else if (m->from_etc_fstab)
136 return &m->parameters_etc_fstab;
141 static MountParameters* get_mount_parameters(Mount *m) {
144 if (m->from_proc_self_mountinfo)
145 return &m->parameters_proc_self_mountinfo;
147 return get_mount_parameters_configured(m);
150 static int mount_add_mount_links(Mount *m) {
157 pm = get_mount_parameters_configured(m);
159 /* Adds in links to other mount points that might lie below or
160 * above us in the hierarchy */
162 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_MOUNT]) {
163 Mount *n = (Mount*) other;
169 if (n->meta.load_state != UNIT_LOADED)
172 pn = get_mount_parameters_configured(n);
174 if (path_startswith(m->where, n->where)) {
176 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
180 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
183 } else if (path_startswith(n->where, m->where)) {
185 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
189 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
192 } else if (pm && path_startswith(pm->what, n->where)) {
194 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
197 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
200 } else if (pn && path_startswith(pn->what, m->where)) {
202 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
205 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
213 static int mount_add_swap_links(Mount *m) {
219 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_SWAP])
220 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
226 static int mount_add_path_links(Mount *m) {
232 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_PATH])
233 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
239 static int mount_add_automount_links(Mount *m) {
245 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_AUTOMOUNT])
246 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
252 static int mount_add_socket_links(Mount *m) {
258 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_SOCKET])
259 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
265 static char* mount_test_option(const char *haystack, const char *needle) {
270 /* Like glibc's hasmntopt(), but works on a string, not a
277 me.mnt_opts = (char*) haystack;
279 return hasmntopt(&me, needle);
282 static bool mount_is_network(MountParameters *p) {
285 if (mount_test_option(p->options, "_netdev"))
288 if (p->fstype && fstype_is_network(p->fstype))
294 static bool mount_is_bind(MountParameters *p) {
297 if (mount_test_option(p->options, "bind"))
300 if (p->fstype && streq(p->fstype, "bind"))
306 static bool needs_quota(MountParameters *p) {
309 if (mount_is_network(p))
312 if (mount_is_bind(p))
315 return mount_test_option(p->options, "usrquota") ||
316 mount_test_option(p->options, "grpquota") ||
317 mount_test_option(p->options, "quota") ||
318 mount_test_option(p->options, "usrjquota") ||
319 mount_test_option(p->options, "grpjquota");
322 static int mount_add_fstab_links(Mount *m) {
323 const char *target, *after = NULL, *after2 = NULL;
327 bool noauto, nofail, handle, automount;
331 if (m->meta.manager->running_as != MANAGER_SYSTEM)
334 if (!(p = get_mount_parameters_configured(m)))
337 if (p != &m->parameters_etc_fstab)
340 noauto = !!mount_test_option(p->options, "noauto");
341 nofail = !!mount_test_option(p->options, "nofail");
343 mount_test_option(p->options, "comment=systemd.automount") ||
344 mount_test_option(p->options, "x-systemd-automount");
347 mount_test_option(p->options, "comment=systemd.mount") ||
348 mount_test_option(p->options, "x-systemd-mount") ||
349 m->meta.manager->mount_auto;
351 if (mount_is_network(p)) {
352 target = SPECIAL_REMOTE_FS_TARGET;
353 after = SPECIAL_REMOTE_FS_PRE_TARGET;
354 after2 = SPECIAL_NETWORK_TARGET;
356 target = SPECIAL_LOCAL_FS_TARGET;
357 after = SPECIAL_LOCAL_FS_PRE_TARGET;
360 if (!path_equal(m->where, "/"))
361 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
364 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
368 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
372 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true)) < 0)
378 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
381 /* If auto is configured as well also pull in the
382 * mount right-away, but don't rely on it. */
383 if (!noauto) /* automount + auto */
384 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
387 /* Install automount unit */
388 if (!nofail) /* automount + fail */
389 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(am), true);
390 else /* automount + nofail */
391 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
393 } else if (handle && !noauto) {
395 /* Automatically add mount points that aren't natively
396 * configured to local-fs.target */
398 if (!nofail) /* auto + fail */
399 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
400 else /* auto + nofail */
401 return unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true);
407 static int mount_add_device_links(Mount *m) {
413 if (!(p = get_mount_parameters_configured(m)))
419 if (!mount_is_bind(p) &&
420 !path_equal(m->where, "/") &&
421 p == &m->parameters_etc_fstab) {
424 noauto = !!mount_test_option(p->options, "noauto");
425 nofail = !!mount_test_option(p->options, "nofail");
427 if ((r = unit_add_node_link(UNIT(m), p->what,
429 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
435 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
436 !path_equal(m->where, "/")) {
439 /* Let's add in the fsck service */
441 /* aka SPECIAL_FSCK_SERVICE */
442 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
445 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
446 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
453 SERVICE(fsck)->fsck_passno = p->passno;
455 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
462 static int mount_add_default_dependencies(Mount *m) {
467 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
468 !path_equal(m->where, "/")) {
471 p = get_mount_parameters_configured(m);
473 if (p && needs_quota(p)) {
474 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
475 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
479 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
486 static int mount_fix_timeouts(Mount *m) {
488 const char *timeout = NULL;
497 if (!(p = get_mount_parameters_configured(m)))
500 /* Allow configuration how long we wait for a device that
501 * backs a mount point to show up. This is useful to support
502 * endless device timeouts for devices that show up only after
503 * user input, like crypto devices. */
505 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
507 else if ((timeout = mount_test_option(p->options, "x-systemd-device-timeout")))
512 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
516 r = parse_usec(t, &u);
520 log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout);
524 SET_FOREACH(other, m->meta.dependencies[UNIT_AFTER], i) {
525 if (other->meta.type != UNIT_DEVICE)
528 other->meta.job_timeout = u;
534 static int mount_verify(Mount *m) {
539 if (m->meta.load_state != UNIT_LOADED)
542 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
545 if (!(e = unit_name_from_path(m->where, ".mount")))
548 b = unit_has_name(UNIT(m), e);
552 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
556 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
557 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
561 if (m->meta.fragment_path && !m->parameters_fragment.what) {
562 log_error("%s's What setting is missing. Refusing.", m->meta.id);
566 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
567 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
574 static int mount_load(Unit *u) {
579 assert(u->meta.load_state == UNIT_STUB);
581 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
584 /* This is a new unit? Then let's add in some extras */
585 if (u->meta.load_state == UNIT_LOADED) {
586 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
589 if (m->meta.fragment_path)
590 m->from_fragment = true;
591 else if (m->from_etc_fstab)
592 m->meta.default_dependencies = false;
595 if (!(m->where = unit_name_to_path(u->meta.id)))
598 path_kill_slashes(m->where);
600 if (!m->meta.description)
601 if ((r = unit_set_description(u, m->where)) < 0)
604 if ((r = mount_add_device_links(m)) < 0)
607 if ((r = mount_add_mount_links(m)) < 0)
610 if ((r = mount_add_socket_links(m)) < 0)
613 if ((r = mount_add_swap_links(m)) < 0)
616 if ((r = mount_add_path_links(m)) < 0)
619 if ((r = mount_add_automount_links(m)) < 0)
622 if ((r = mount_add_fstab_links(m)) < 0)
625 if (m->meta.default_dependencies)
626 if ((r = mount_add_default_dependencies(m)) < 0)
629 if ((r = unit_add_default_cgroups(u)) < 0)
632 mount_fix_timeouts(m);
635 return mount_verify(m);
638 static int mount_notify_automount(Mount *m, int status) {
645 SET_FOREACH(p, m->meta.dependencies[UNIT_TRIGGERED_BY], i)
646 if (p->meta.type == UNIT_AUTOMOUNT) {
647 r = automount_send_ready(AUTOMOUNT(p), status);
655 static void mount_set_state(Mount *m, MountState state) {
656 MountState old_state;
659 old_state = m->state;
662 if (state != MOUNT_MOUNTING &&
663 state != MOUNT_MOUNTING_DONE &&
664 state != MOUNT_REMOUNTING &&
665 state != MOUNT_UNMOUNTING &&
666 state != MOUNT_MOUNTING_SIGTERM &&
667 state != MOUNT_MOUNTING_SIGKILL &&
668 state != MOUNT_UNMOUNTING_SIGTERM &&
669 state != MOUNT_UNMOUNTING_SIGKILL &&
670 state != MOUNT_REMOUNTING_SIGTERM &&
671 state != MOUNT_REMOUNTING_SIGKILL) {
672 unit_unwatch_timer(UNIT(m), &m->timer_watch);
673 mount_unwatch_control_pid(m);
674 m->control_command = NULL;
675 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
678 if (state == MOUNT_MOUNTED ||
679 state == MOUNT_REMOUNTING)
680 mount_notify_automount(m, 0);
681 else if (state == MOUNT_DEAD ||
682 state == MOUNT_UNMOUNTING ||
683 state == MOUNT_MOUNTING_SIGTERM ||
684 state == MOUNT_MOUNTING_SIGKILL ||
685 state == MOUNT_REMOUNTING_SIGTERM ||
686 state == MOUNT_REMOUNTING_SIGKILL ||
687 state == MOUNT_UNMOUNTING_SIGTERM ||
688 state == MOUNT_UNMOUNTING_SIGKILL ||
689 state == MOUNT_FAILED)
690 mount_notify_automount(m, -ENODEV);
692 if (state != old_state)
693 log_debug("%s changed %s -> %s",
695 mount_state_to_string(old_state),
696 mount_state_to_string(state));
698 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
699 m->reload_failure = false;
702 static int mount_coldplug(Unit *u) {
704 MountState new_state = MOUNT_DEAD;
708 assert(m->state == MOUNT_DEAD);
710 if (m->deserialized_state != m->state)
711 new_state = m->deserialized_state;
712 else if (m->from_proc_self_mountinfo)
713 new_state = MOUNT_MOUNTED;
715 if (new_state != m->state) {
717 if (new_state == MOUNT_MOUNTING ||
718 new_state == MOUNT_MOUNTING_DONE ||
719 new_state == MOUNT_REMOUNTING ||
720 new_state == MOUNT_UNMOUNTING ||
721 new_state == MOUNT_MOUNTING_SIGTERM ||
722 new_state == MOUNT_MOUNTING_SIGKILL ||
723 new_state == MOUNT_UNMOUNTING_SIGTERM ||
724 new_state == MOUNT_UNMOUNTING_SIGKILL ||
725 new_state == MOUNT_REMOUNTING_SIGTERM ||
726 new_state == MOUNT_REMOUNTING_SIGKILL) {
728 if (m->control_pid <= 0)
731 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
734 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
738 mount_set_state(m, new_state);
744 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
751 p = get_mount_parameters(m);
754 "%sMount State: %s\n"
757 "%sFile System Type: %s\n"
759 "%sFrom /etc/fstab: %s\n"
760 "%sFrom /proc/self/mountinfo: %s\n"
761 "%sFrom fragment: %s\n"
762 "%sDirectoryMode: %04o\n",
763 prefix, mount_state_to_string(m->state),
765 prefix, strna(p->what),
766 prefix, strna(p->fstype),
767 prefix, strna(p->options),
768 prefix, yes_no(m->from_etc_fstab),
769 prefix, yes_no(m->from_proc_self_mountinfo),
770 prefix, yes_no(m->from_fragment),
771 prefix, m->directory_mode);
773 if (m->control_pid > 0)
775 "%sControl PID: %lu\n",
776 prefix, (unsigned long) m->control_pid);
778 exec_context_dump(&m->exec_context, f, prefix);
781 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
789 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
792 if ((r = exec_spawn(c,
796 m->meta.manager->environment,
800 m->meta.manager->confirm_spawn,
801 m->meta.cgroup_bondings,
802 m->meta.cgroup_attributes,
806 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
807 /* FIXME: we need to do something here */
815 unit_unwatch_timer(UNIT(m), &m->timer_watch);
820 static void mount_enter_dead(Mount *m, bool success) {
826 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
829 static void mount_enter_mounted(Mount *m, bool success) {
835 mount_set_state(m, MOUNT_MOUNTED);
838 static void mount_enter_signal(Mount *m, MountState state, bool success) {
841 bool wait_for_exit = false;
848 if (m->exec_context.kill_mode != KILL_NONE) {
849 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
850 state == MOUNT_UNMOUNTING_SIGTERM ||
851 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
853 if (m->control_pid > 0) {
854 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
856 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
858 wait_for_exit = true;
861 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
863 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
868 /* Exclude the control pid from being killed via the cgroup */
869 if (m->control_pid > 0)
870 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
873 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
874 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
875 log_warning("Failed to kill control group: %s", strerror(-r));
877 wait_for_exit = true;
885 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
888 mount_set_state(m, state);
889 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
890 mount_enter_mounted(m, true);
892 mount_enter_dead(m, true);
897 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
899 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
900 mount_enter_mounted(m, false);
902 mount_enter_dead(m, false);
908 static void mount_enter_unmounting(Mount *m, bool success) {
916 m->control_command_id = MOUNT_EXEC_UNMOUNT;
917 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
919 if ((r = exec_command_set(
926 mount_unwatch_control_pid(m);
928 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
931 mount_set_state(m, MOUNT_UNMOUNTING);
936 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
937 mount_enter_mounted(m, false);
940 static void mount_enter_mounting(Mount *m) {
946 m->control_command_id = MOUNT_EXEC_MOUNT;
947 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
949 mkdir_p(m->where, m->directory_mode);
951 /* Create the source directory for bind-mounts if needed */
952 p = get_mount_parameters_configured(m);
953 if (p && mount_is_bind(p))
954 mkdir_p(p->what, m->directory_mode);
956 if (m->from_fragment)
957 r = exec_command_set(
960 m->parameters_fragment.what,
962 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
963 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
965 else if (m->from_etc_fstab)
966 r = exec_command_set(
977 mount_unwatch_control_pid(m);
979 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
982 mount_set_state(m, MOUNT_MOUNTING);
987 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
988 mount_enter_dead(m, false);
991 static void mount_enter_mounting_done(Mount *m) {
994 mount_set_state(m, MOUNT_MOUNTING_DONE);
997 static void mount_enter_remounting(Mount *m, bool success) {
1005 m->control_command_id = MOUNT_EXEC_REMOUNT;
1006 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
1008 if (m->from_fragment) {
1012 if (m->parameters_fragment.options) {
1013 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
1022 r = exec_command_set(
1025 m->parameters_fragment.what,
1027 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1032 } else if (m->from_etc_fstab)
1033 r = exec_command_set(
1045 mount_unwatch_control_pid(m);
1047 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
1050 mount_set_state(m, MOUNT_REMOUNTING);
1055 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
1056 m->reload_failure = true;
1057 mount_enter_mounted(m, true);
1060 static int mount_start(Unit *u) {
1061 Mount *m = MOUNT(u);
1065 /* We cannot fulfill this request right now, try again later
1067 if (m->state == MOUNT_UNMOUNTING ||
1068 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1069 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1070 m->state == MOUNT_MOUNTING_SIGTERM ||
1071 m->state == MOUNT_MOUNTING_SIGKILL)
1074 /* Already on it! */
1075 if (m->state == MOUNT_MOUNTING)
1078 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1081 mount_enter_mounting(m);
1085 static int mount_stop(Unit *u) {
1086 Mount *m = MOUNT(u);
1091 if (m->state == MOUNT_UNMOUNTING ||
1092 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1093 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1094 m->state == MOUNT_MOUNTING_SIGTERM ||
1095 m->state == MOUNT_MOUNTING_SIGKILL)
1098 assert(m->state == MOUNT_MOUNTING ||
1099 m->state == MOUNT_MOUNTING_DONE ||
1100 m->state == MOUNT_MOUNTED ||
1101 m->state == MOUNT_REMOUNTING ||
1102 m->state == MOUNT_REMOUNTING_SIGTERM ||
1103 m->state == MOUNT_REMOUNTING_SIGKILL);
1105 mount_enter_unmounting(m, true);
1109 static int mount_reload(Unit *u) {
1110 Mount *m = MOUNT(u);
1114 if (m->state == MOUNT_MOUNTING_DONE)
1117 assert(m->state == MOUNT_MOUNTED);
1119 mount_enter_remounting(m, true);
1123 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1124 Mount *m = MOUNT(u);
1130 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1131 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1133 if (m->control_pid > 0)
1134 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1136 if (m->control_command_id >= 0)
1137 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1142 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1143 Mount *m = MOUNT(u);
1150 if (streq(key, "state")) {
1153 if ((state = mount_state_from_string(value)) < 0)
1154 log_debug("Failed to parse state value %s", value);
1156 m->deserialized_state = state;
1157 } else if (streq(key, "failure")) {
1160 if ((b = parse_boolean(value)) < 0)
1161 log_debug("Failed to parse failure value %s", value);
1163 m->failure = b || m->failure;
1165 } else if (streq(key, "control-pid")) {
1168 if (parse_pid(value, &pid) < 0)
1169 log_debug("Failed to parse control-pid value %s", value);
1171 m->control_pid = pid;
1172 } else if (streq(key, "control-command")) {
1173 MountExecCommand id;
1175 if ((id = mount_exec_command_from_string(value)) < 0)
1176 log_debug("Failed to parse exec-command value %s", value);
1178 m->control_command_id = id;
1179 m->control_command = m->exec_command + id;
1183 log_debug("Unknown serialization key '%s'", key);
1188 static UnitActiveState mount_active_state(Unit *u) {
1191 return state_translation_table[MOUNT(u)->state];
1194 static const char *mount_sub_state_to_string(Unit *u) {
1197 return mount_state_to_string(MOUNT(u)->state);
1200 static bool mount_check_gc(Unit *u) {
1201 Mount *m = MOUNT(u);
1205 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1208 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1209 Mount *m = MOUNT(u);
1215 if (pid != m->control_pid)
1220 success = is_clean_exit(code, status);
1221 m->failure = m->failure || !success;
1223 if (m->control_command) {
1224 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1225 m->control_command = NULL;
1226 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1229 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1230 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1232 /* Note that mount(8) returning and the kernel sending us a
1233 * mount table change event might happen out-of-order. If an
1234 * operation succeed we assume the kernel will follow soon too
1235 * and already change into the resulting state. If it fails
1236 * we check if the kernel still knows about the mount. and
1237 * change state accordingly. */
1241 case MOUNT_MOUNTING:
1242 case MOUNT_MOUNTING_DONE:
1243 case MOUNT_MOUNTING_SIGKILL:
1244 case MOUNT_MOUNTING_SIGTERM:
1247 mount_enter_mounted(m, true);
1248 else if (m->from_proc_self_mountinfo)
1249 mount_enter_mounted(m, false);
1251 mount_enter_dead(m, false);
1254 case MOUNT_REMOUNTING:
1255 case MOUNT_REMOUNTING_SIGKILL:
1256 case MOUNT_REMOUNTING_SIGTERM:
1258 m->reload_failure = !success;
1259 if (m->from_proc_self_mountinfo)
1260 mount_enter_mounted(m, true);
1262 mount_enter_dead(m, true);
1266 case MOUNT_UNMOUNTING:
1267 case MOUNT_UNMOUNTING_SIGKILL:
1268 case MOUNT_UNMOUNTING_SIGTERM:
1271 mount_enter_dead(m, true);
1272 else if (m->from_proc_self_mountinfo)
1273 mount_enter_mounted(m, false);
1275 mount_enter_dead(m, false);
1279 assert_not_reached("Uh, control process died at wrong time.");
1282 /* Notify clients about changed exit status */
1283 unit_add_to_dbus_queue(u);
1286 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1287 Mount *m = MOUNT(u);
1290 assert(elapsed == 1);
1291 assert(w == &m->timer_watch);
1295 case MOUNT_MOUNTING:
1296 case MOUNT_MOUNTING_DONE:
1297 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1298 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1301 case MOUNT_REMOUNTING:
1302 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1303 m->reload_failure = true;
1304 mount_enter_mounted(m, true);
1307 case MOUNT_UNMOUNTING:
1308 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1309 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1312 case MOUNT_MOUNTING_SIGTERM:
1313 if (m->exec_context.send_sigkill) {
1314 log_warning("%s mounting timed out. Killing.", u->meta.id);
1315 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1317 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1319 if (m->from_proc_self_mountinfo)
1320 mount_enter_mounted(m, false);
1322 mount_enter_dead(m, false);
1326 case MOUNT_REMOUNTING_SIGTERM:
1327 if (m->exec_context.send_sigkill) {
1328 log_warning("%s remounting timed out. Killing.", u->meta.id);
1329 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1331 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1333 if (m->from_proc_self_mountinfo)
1334 mount_enter_mounted(m, false);
1336 mount_enter_dead(m, false);
1340 case MOUNT_UNMOUNTING_SIGTERM:
1341 if (m->exec_context.send_sigkill) {
1342 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1343 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1345 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1347 if (m->from_proc_self_mountinfo)
1348 mount_enter_mounted(m, false);
1350 mount_enter_dead(m, false);
1354 case MOUNT_MOUNTING_SIGKILL:
1355 case MOUNT_REMOUNTING_SIGKILL:
1356 case MOUNT_UNMOUNTING_SIGKILL:
1357 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1359 if (m->from_proc_self_mountinfo)
1360 mount_enter_mounted(m, false);
1362 mount_enter_dead(m, false);
1366 assert_not_reached("Timeout at wrong time.");
1370 static int mount_add_one(
1374 const char *options,
1377 bool from_proc_self_mountinfo,
1382 char *e, *w = NULL, *o = NULL, *f = NULL;
1391 assert(!set_flags || from_proc_self_mountinfo);
1393 /* Ignore API mount points. They should never be referenced in
1394 * dependencies ever. */
1395 if (mount_point_is_api(where) || mount_point_ignore(where))
1398 if (streq(fstype, "autofs"))
1401 /* probably some kind of swap, ignore */
1402 if (!is_path(where))
1405 if (!(e = unit_name_from_path(where, ".mount")))
1408 if (!(u = manager_get_unit(m, e))) {
1411 if (!(u = unit_new(m))) {
1416 r = unit_add_name(u, e);
1422 if (!(MOUNT(u)->where = strdup(where))) {
1427 unit_add_to_load_queue(u);
1433 if (!(w = strdup(what)) ||
1434 !(o = strdup(options)) ||
1435 !(f = strdup(fstype))) {
1440 if (from_proc_self_mountinfo) {
1441 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1444 MOUNT(u)->is_mounted = true;
1445 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1446 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1449 MOUNT(u)->from_proc_self_mountinfo = true;
1451 p = &MOUNT(u)->parameters_etc_fstab;
1452 MOUNT(u)->from_etc_fstab = true;
1466 unit_add_to_dbus_queue(u);
1481 static int mount_find_pri(char *options) {
1485 if (!(pri = mount_test_option(options, "pri")))
1491 r = strtoul(pri, &end, 10);
1496 if (end == pri || (*end != ',' && *end != 0))
1502 static int mount_load_etc_fstab(Manager *m) {
1510 if (!(f = setmntent("/etc/fstab", "r")))
1513 while ((me = getmntent(f))) {
1517 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1522 if (!(where = strdup(me->mnt_dir))) {
1529 path_kill_slashes(what);
1531 if (where[0] == '/')
1532 path_kill_slashes(where);
1534 if (streq(me->mnt_type, "swap")) {
1537 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1544 !!mount_test_option(me->mnt_opts, "noauto"),
1545 !!mount_test_option(me->mnt_opts, "nofail"),
1546 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1549 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1564 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1567 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1571 rewind(m->proc_self_mountinfo);
1576 device = path = options = options2 = fstype = d = p = o = NULL;
1578 if ((k = fscanf(m->proc_self_mountinfo,
1579 "%*s " /* (1) mount id */
1580 "%*s " /* (2) parent id */
1581 "%*s " /* (3) major:minor */
1582 "%*s " /* (4) root */
1583 "%ms " /* (5) mount point */
1584 "%ms" /* (6) mount options */
1585 "%*[^-]" /* (7) optional fields */
1586 "- " /* (8) separator */
1587 "%ms " /* (9) file system type */
1588 "%ms" /* (10) mount source */
1589 "%ms" /* (11) mount options 2 */
1590 "%*[^\n]", /* some rubbish at the end */
1600 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1604 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1609 if (!(d = cunescape(device)) ||
1610 !(p = cunescape(path))) {
1615 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1642 static void mount_shutdown(Manager *m) {
1645 if (m->proc_self_mountinfo) {
1646 fclose(m->proc_self_mountinfo);
1647 m->proc_self_mountinfo = NULL;
1651 static int mount_enumerate(Manager *m) {
1653 struct epoll_event ev;
1656 if (!m->proc_self_mountinfo) {
1657 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1660 m->mount_watch.type = WATCH_MOUNT;
1661 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1664 ev.events = EPOLLPRI;
1665 ev.data.ptr = &m->mount_watch;
1667 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1671 if ((r = mount_load_etc_fstab(m)) < 0)
1674 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1684 void mount_fd_event(Manager *m, int events) {
1689 assert(events & EPOLLPRI);
1691 /* The manager calls this for every fd event happening on the
1692 * /proc/self/mountinfo file, which informs us about mounting
1695 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1696 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1698 /* Reset flags, just in case, for later calls */
1699 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1700 Mount *mount = (Mount*) meta;
1702 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1708 manager_dispatch_load_queue(m);
1710 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1711 Mount *mount = (Mount*) meta;
1713 if (!mount->is_mounted) {
1714 /* This has just been unmounted. */
1716 mount->from_proc_self_mountinfo = false;
1718 switch (mount->state) {
1721 mount_enter_dead(mount, true);
1725 mount_set_state(mount, mount->state);
1730 } else if (mount->just_mounted || mount->just_changed) {
1732 /* New or changed mount entry */
1734 switch (mount->state) {
1738 mount_enter_mounted(mount, true);
1741 case MOUNT_MOUNTING:
1742 mount_enter_mounting_done(mount);
1746 /* Nothing really changed, but let's
1747 * issue an notification call
1748 * nonetheless, in case somebody is
1749 * waiting for this. (e.g. file system
1750 * ro/rw remounts.) */
1751 mount_set_state(mount, mount->state);
1756 /* Reset the flags for later calls */
1757 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1761 static void mount_reset_failed(Unit *u) {
1762 Mount *m = MOUNT(u);
1766 if (m->state == MOUNT_FAILED)
1767 mount_set_state(m, MOUNT_DEAD);
1772 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1773 Mount *m = MOUNT(u);
1775 Set *pid_set = NULL;
1779 if (who == KILL_MAIN) {
1780 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1784 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1785 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1789 if (who == KILL_CONTROL || who == KILL_ALL)
1790 if (m->control_pid > 0)
1791 if (kill(m->control_pid, signo) < 0)
1794 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
1797 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1800 /* Exclude the control pid from being killed via the cgroup */
1801 if (m->control_pid > 0)
1802 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1807 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1808 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
1819 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1820 [MOUNT_DEAD] = "dead",
1821 [MOUNT_MOUNTING] = "mounting",
1822 [MOUNT_MOUNTING_DONE] = "mounting-done",
1823 [MOUNT_MOUNTED] = "mounted",
1824 [MOUNT_REMOUNTING] = "remounting",
1825 [MOUNT_UNMOUNTING] = "unmounting",
1826 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1827 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1828 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1829 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1830 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1831 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1832 [MOUNT_FAILED] = "failed"
1835 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1837 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1838 [MOUNT_EXEC_MOUNT] = "ExecMount",
1839 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1840 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1843 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1845 const UnitVTable mount_vtable = {
1853 .no_instances = true,
1854 .show_status = true,
1860 .coldplug = mount_coldplug,
1864 .start = mount_start,
1866 .reload = mount_reload,
1870 .serialize = mount_serialize,
1871 .deserialize_item = mount_deserialize_item,
1873 .active_state = mount_active_state,
1874 .sub_state_to_string = mount_sub_state_to_string,
1876 .check_gc = mount_check_gc,
1878 .sigchld_event = mount_sigchld_event,
1879 .timer_event = mount_timer_event,
1881 .reset_failed = mount_reset_failed,
1883 .bus_interface = "org.freedesktop.systemd1.Mount",
1884 .bus_message_handler = bus_mount_message_handler,
1885 .bus_invalidating_properties = bus_mount_invalidating_properties,
1887 .enumerate = mount_enumerate,
1888 .shutdown = mount_shutdown