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->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->manager->default_std_output;
73 m->exec_context.std_error = u->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 UNIT(m)->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, UNIT(m)->manager->units_by_type[UNIT_MOUNT]) {
163 Mount *n = MOUNT(other);
169 if (UNIT(n)->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, UNIT(m)->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, UNIT(m)->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, UNIT(m)->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, UNIT(m)->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 (UNIT(m)->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 UNIT(m)->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 ((r = manager_load_unit(UNIT(m)->manager, target, NULL, NULL, &tu)) < 0)
364 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
368 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true)) < 0)
374 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
377 /* If auto is configured as well also pull in the
378 * mount right-away, but don't rely on it. */
379 if (!noauto) /* automount + auto */
380 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
383 /* Install automount unit */
384 if (!nofail) /* automount + fail */
385 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, am, true);
386 else /* automount + nofail */
387 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, am, true);
389 } else if (handle && !noauto) {
391 /* Automatically add mount points that aren't natively
392 * configured to local-fs.target */
394 if (!nofail) /* auto + fail */
395 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
396 else /* auto + nofail */
397 return unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true);
403 static int mount_add_device_links(Mount *m) {
409 if (!(p = get_mount_parameters_configured(m)))
415 if (!mount_is_bind(p) &&
416 !path_equal(m->where, "/") &&
417 p == &m->parameters_etc_fstab) {
420 noauto = !!mount_test_option(p->options, "noauto");
421 nofail = !!mount_test_option(p->options, "nofail");
423 if ((r = unit_add_node_link(UNIT(m), p->what,
425 UNIT(m)->manager->running_as == MANAGER_SYSTEM)) < 0)
431 UNIT(m)->manager->running_as == MANAGER_SYSTEM &&
432 !path_equal(m->where, "/")) {
435 /* Let's add in the fsck service */
437 /* aka SPECIAL_FSCK_SERVICE */
438 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
441 if ((r = manager_load_unit_prepare(UNIT(m)->manager, name, NULL, NULL, &fsck)) < 0) {
442 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
449 SERVICE(fsck)->fsck_passno = p->passno;
451 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
458 static int mount_add_default_dependencies(Mount *m) {
464 if (UNIT(m)->manager->running_as != MANAGER_SYSTEM)
467 p = get_mount_parameters_configured(m);
468 if (p && needs_quota(p)) {
469 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
470 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
474 if (!path_equal(m->where, "/"))
475 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
481 static int mount_fix_timeouts(Mount *m) {
483 const char *timeout = NULL;
492 if (!(p = get_mount_parameters_configured(m)))
495 /* Allow configuration how long we wait for a device that
496 * backs a mount point to show up. This is useful to support
497 * endless device timeouts for devices that show up only after
498 * user input, like crypto devices. */
500 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
502 else if ((timeout = mount_test_option(p->options, "x-systemd-device-timeout")))
507 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
511 r = parse_usec(t, &u);
515 log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout);
519 SET_FOREACH(other, UNIT(m)->dependencies[UNIT_AFTER], i) {
520 if (other->type != UNIT_DEVICE)
523 other->job_timeout = u;
529 static int mount_verify(Mount *m) {
534 if (UNIT(m)->load_state != UNIT_LOADED)
537 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
540 if (!(e = unit_name_from_path(m->where, ".mount")))
543 b = unit_has_name(UNIT(m), e);
547 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->id);
551 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
552 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
556 if (UNIT(m)->fragment_path && !m->parameters_fragment.what) {
557 log_error("%s's What setting is missing. Refusing.", UNIT(m)->id);
561 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
562 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(m)->id);
569 static int mount_load(Unit *u) {
574 assert(u->load_state == UNIT_STUB);
576 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
579 /* This is a new unit? Then let's add in some extras */
580 if (u->load_state == UNIT_LOADED) {
581 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
584 if (UNIT(m)->fragment_path)
585 m->from_fragment = true;
586 else if (m->from_etc_fstab)
587 /* We always add several default dependencies to fstab mounts,
588 * but we do not want the implicit complementing of Wants= with After=
589 * in the target unit that this mount unit will be hooked into. */
590 UNIT(m)->default_dependencies = false;
593 if (!(m->where = unit_name_to_path(u->id)))
596 path_kill_slashes(m->where);
598 if (!UNIT(m)->description)
599 if ((r = unit_set_description(u, m->where)) < 0)
602 if ((r = mount_add_device_links(m)) < 0)
605 if ((r = mount_add_mount_links(m)) < 0)
608 if ((r = mount_add_socket_links(m)) < 0)
611 if ((r = mount_add_swap_links(m)) < 0)
614 if ((r = mount_add_path_links(m)) < 0)
617 if ((r = mount_add_automount_links(m)) < 0)
620 if ((r = mount_add_fstab_links(m)) < 0)
623 if (UNIT(m)->default_dependencies || m->from_etc_fstab)
624 if ((r = mount_add_default_dependencies(m)) < 0)
627 if ((r = unit_add_default_cgroups(u)) < 0)
630 mount_fix_timeouts(m);
633 return mount_verify(m);
636 static int mount_notify_automount(Mount *m, int status) {
643 SET_FOREACH(p, UNIT(m)->dependencies[UNIT_TRIGGERED_BY], i)
644 if (p->type == UNIT_AUTOMOUNT) {
645 r = automount_send_ready(AUTOMOUNT(p), status);
653 static void mount_set_state(Mount *m, MountState state) {
654 MountState old_state;
657 old_state = m->state;
660 if (state != MOUNT_MOUNTING &&
661 state != MOUNT_MOUNTING_DONE &&
662 state != MOUNT_REMOUNTING &&
663 state != MOUNT_UNMOUNTING &&
664 state != MOUNT_MOUNTING_SIGTERM &&
665 state != MOUNT_MOUNTING_SIGKILL &&
666 state != MOUNT_UNMOUNTING_SIGTERM &&
667 state != MOUNT_UNMOUNTING_SIGKILL &&
668 state != MOUNT_REMOUNTING_SIGTERM &&
669 state != MOUNT_REMOUNTING_SIGKILL) {
670 unit_unwatch_timer(UNIT(m), &m->timer_watch);
671 mount_unwatch_control_pid(m);
672 m->control_command = NULL;
673 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
676 if (state == MOUNT_MOUNTED ||
677 state == MOUNT_REMOUNTING)
678 mount_notify_automount(m, 0);
679 else if (state == MOUNT_DEAD ||
680 state == MOUNT_UNMOUNTING ||
681 state == MOUNT_MOUNTING_SIGTERM ||
682 state == MOUNT_MOUNTING_SIGKILL ||
683 state == MOUNT_REMOUNTING_SIGTERM ||
684 state == MOUNT_REMOUNTING_SIGKILL ||
685 state == MOUNT_UNMOUNTING_SIGTERM ||
686 state == MOUNT_UNMOUNTING_SIGKILL ||
687 state == MOUNT_FAILED)
688 mount_notify_automount(m, -ENODEV);
690 if (state != old_state)
691 log_debug("%s changed %s -> %s",
693 mount_state_to_string(old_state),
694 mount_state_to_string(state));
696 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], m->reload_result == MOUNT_SUCCESS);
697 m->reload_result = MOUNT_SUCCESS;
700 static int mount_coldplug(Unit *u) {
702 MountState new_state = MOUNT_DEAD;
706 assert(m->state == MOUNT_DEAD);
708 if (m->deserialized_state != m->state)
709 new_state = m->deserialized_state;
710 else if (m->from_proc_self_mountinfo)
711 new_state = MOUNT_MOUNTED;
713 if (new_state != m->state) {
715 if (new_state == MOUNT_MOUNTING ||
716 new_state == MOUNT_MOUNTING_DONE ||
717 new_state == MOUNT_REMOUNTING ||
718 new_state == MOUNT_UNMOUNTING ||
719 new_state == MOUNT_MOUNTING_SIGTERM ||
720 new_state == MOUNT_MOUNTING_SIGKILL ||
721 new_state == MOUNT_UNMOUNTING_SIGTERM ||
722 new_state == MOUNT_UNMOUNTING_SIGKILL ||
723 new_state == MOUNT_REMOUNTING_SIGTERM ||
724 new_state == MOUNT_REMOUNTING_SIGKILL) {
726 if (m->control_pid <= 0)
729 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
732 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
736 mount_set_state(m, new_state);
742 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
749 p = get_mount_parameters(m);
752 "%sMount State: %s\n"
756 "%sFile System Type: %s\n"
758 "%sFrom /etc/fstab: %s\n"
759 "%sFrom /proc/self/mountinfo: %s\n"
760 "%sFrom fragment: %s\n"
761 "%sDirectoryMode: %04o\n",
762 prefix, mount_state_to_string(m->state),
763 prefix, mount_result_to_string(m->result),
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 UNIT(m)->manager->environment,
800 UNIT(m)->manager->confirm_spawn,
801 UNIT(m)->cgroup_bondings,
802 UNIT(m)->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, MountResult f) {
823 if (f != MOUNT_SUCCESS)
826 mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD);
829 static void mount_enter_mounted(Mount *m, MountResult f) {
832 if (f != MOUNT_SUCCESS)
835 mount_set_state(m, MOUNT_MOUNTED);
838 static void mount_enter_signal(Mount *m, MountState state, MountResult f) {
841 bool wait_for_exit = false;
845 if (f != MOUNT_SUCCESS)
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(UNIT(m)->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, MOUNT_SUCCESS);
892 mount_enter_dead(m, MOUNT_SUCCESS);
897 log_warning("%s failed to kill processes: %s", UNIT(m)->id, strerror(-r));
899 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
900 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
902 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
908 static void mount_enter_unmounting(Mount *m) {
913 m->control_command_id = MOUNT_EXEC_UNMOUNT;
914 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
916 if ((r = exec_command_set(
923 mount_unwatch_control_pid(m);
925 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
928 mount_set_state(m, MOUNT_UNMOUNTING);
933 log_warning("%s failed to run 'umount' task: %s", UNIT(m)->id, strerror(-r));
934 mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
937 static void mount_enter_mounting(Mount *m) {
943 m->control_command_id = MOUNT_EXEC_MOUNT;
944 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
946 mkdir_p(m->where, m->directory_mode);
948 /* Create the source directory for bind-mounts if needed */
949 p = get_mount_parameters_configured(m);
950 if (p && mount_is_bind(p))
951 mkdir_p(p->what, m->directory_mode);
953 if (m->from_fragment)
954 r = exec_command_set(
957 m->parameters_fragment.what,
959 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
960 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
962 else if (m->from_etc_fstab)
963 r = exec_command_set(
974 mount_unwatch_control_pid(m);
976 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
979 mount_set_state(m, MOUNT_MOUNTING);
984 log_warning("%s failed to run 'mount' task: %s", UNIT(m)->id, strerror(-r));
985 mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
988 static void mount_enter_mounting_done(Mount *m) {
991 mount_set_state(m, MOUNT_MOUNTING_DONE);
994 static void mount_enter_remounting(Mount *m) {
999 m->control_command_id = MOUNT_EXEC_REMOUNT;
1000 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
1002 if (m->from_fragment) {
1006 if (m->parameters_fragment.options) {
1007 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
1016 r = exec_command_set(
1019 m->parameters_fragment.what,
1021 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1026 } else if (m->from_etc_fstab)
1027 r = exec_command_set(
1039 mount_unwatch_control_pid(m);
1041 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
1044 mount_set_state(m, MOUNT_REMOUNTING);
1049 log_warning("%s failed to run 'remount' task: %s", UNIT(m)->id, strerror(-r));
1050 m->reload_result = MOUNT_FAILURE_RESOURCES;
1051 mount_enter_mounted(m, MOUNT_SUCCESS);
1054 static int mount_start(Unit *u) {
1055 Mount *m = MOUNT(u);
1059 /* We cannot fulfill this request right now, try again later
1061 if (m->state == MOUNT_UNMOUNTING ||
1062 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1063 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1064 m->state == MOUNT_MOUNTING_SIGTERM ||
1065 m->state == MOUNT_MOUNTING_SIGKILL)
1068 /* Already on it! */
1069 if (m->state == MOUNT_MOUNTING)
1072 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1074 m->result = MOUNT_SUCCESS;
1075 m->reload_result = MOUNT_SUCCESS;
1077 mount_enter_mounting(m);
1081 static int mount_stop(Unit *u) {
1082 Mount *m = MOUNT(u);
1087 if (m->state == MOUNT_UNMOUNTING ||
1088 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1089 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1090 m->state == MOUNT_MOUNTING_SIGTERM ||
1091 m->state == MOUNT_MOUNTING_SIGKILL)
1094 assert(m->state == MOUNT_MOUNTING ||
1095 m->state == MOUNT_MOUNTING_DONE ||
1096 m->state == MOUNT_MOUNTED ||
1097 m->state == MOUNT_REMOUNTING ||
1098 m->state == MOUNT_REMOUNTING_SIGTERM ||
1099 m->state == MOUNT_REMOUNTING_SIGKILL);
1101 mount_enter_unmounting(m);
1105 static int mount_reload(Unit *u) {
1106 Mount *m = MOUNT(u);
1110 if (m->state == MOUNT_MOUNTING_DONE)
1113 assert(m->state == MOUNT_MOUNTED);
1115 mount_enter_remounting(m);
1119 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1120 Mount *m = MOUNT(u);
1126 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1127 unit_serialize_item(u, f, "result", mount_result_to_string(m->result));
1128 unit_serialize_item(u, f, "reload-result", mount_result_to_string(m->reload_result));
1130 if (m->control_pid > 0)
1131 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1133 if (m->control_command_id >= 0)
1134 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1139 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1140 Mount *m = MOUNT(u);
1147 if (streq(key, "state")) {
1150 if ((state = mount_state_from_string(value)) < 0)
1151 log_debug("Failed to parse state value %s", value);
1153 m->deserialized_state = state;
1154 } else if (streq(key, "result")) {
1157 f = mount_result_from_string(value);
1159 log_debug("Failed to parse result value %s", value);
1160 else if (f != MOUNT_SUCCESS)
1163 } else if (streq(key, "reload-result")) {
1166 f = mount_result_from_string(value);
1168 log_debug("Failed to parse reload result value %s", value);
1169 else if (f != MOUNT_SUCCESS)
1170 m->reload_result = f;
1172 } else if (streq(key, "control-pid")) {
1175 if (parse_pid(value, &pid) < 0)
1176 log_debug("Failed to parse control-pid value %s", value);
1178 m->control_pid = pid;
1179 } else if (streq(key, "control-command")) {
1180 MountExecCommand id;
1182 if ((id = mount_exec_command_from_string(value)) < 0)
1183 log_debug("Failed to parse exec-command value %s", value);
1185 m->control_command_id = id;
1186 m->control_command = m->exec_command + id;
1190 log_debug("Unknown serialization key '%s'", key);
1195 static UnitActiveState mount_active_state(Unit *u) {
1198 return state_translation_table[MOUNT(u)->state];
1201 static const char *mount_sub_state_to_string(Unit *u) {
1204 return mount_state_to_string(MOUNT(u)->state);
1207 static bool mount_check_gc(Unit *u) {
1208 Mount *m = MOUNT(u);
1212 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1215 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1216 Mount *m = MOUNT(u);
1222 if (pid != m->control_pid)
1227 if (is_clean_exit(code, status))
1229 else if (code == CLD_EXITED)
1230 f = MOUNT_FAILURE_EXIT_CODE;
1231 else if (code == CLD_KILLED)
1232 f = MOUNT_FAILURE_SIGNAL;
1233 else if (code == CLD_DUMPED)
1234 f = MOUNT_FAILURE_CORE_DUMP;
1236 assert_not_reached("Unknown code");
1238 if (f != MOUNT_SUCCESS)
1241 if (m->control_command) {
1242 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1244 m->control_command = NULL;
1245 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1248 log_full(f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
1249 "%s mount process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status);
1251 /* Note that mount(8) returning and the kernel sending us a
1252 * mount table change event might happen out-of-order. If an
1253 * operation succeed we assume the kernel will follow soon too
1254 * and already change into the resulting state. If it fails
1255 * we check if the kernel still knows about the mount. and
1256 * change state accordingly. */
1260 case MOUNT_MOUNTING:
1261 case MOUNT_MOUNTING_DONE:
1262 case MOUNT_MOUNTING_SIGKILL:
1263 case MOUNT_MOUNTING_SIGTERM:
1265 if (f == MOUNT_SUCCESS)
1266 mount_enter_mounted(m, f);
1267 else if (m->from_proc_self_mountinfo)
1268 mount_enter_mounted(m, f);
1270 mount_enter_dead(m, f);
1273 case MOUNT_REMOUNTING:
1274 case MOUNT_REMOUNTING_SIGKILL:
1275 case MOUNT_REMOUNTING_SIGTERM:
1277 m->reload_result = f;
1278 if (m->from_proc_self_mountinfo)
1279 mount_enter_mounted(m, MOUNT_SUCCESS);
1281 mount_enter_dead(m, MOUNT_SUCCESS);
1285 case MOUNT_UNMOUNTING:
1286 case MOUNT_UNMOUNTING_SIGKILL:
1287 case MOUNT_UNMOUNTING_SIGTERM:
1289 if (f == MOUNT_SUCCESS)
1290 mount_enter_dead(m, f);
1291 else if (m->from_proc_self_mountinfo)
1292 mount_enter_mounted(m, f);
1294 mount_enter_dead(m, f);
1298 assert_not_reached("Uh, control process died at wrong time.");
1301 /* Notify clients about changed exit status */
1302 unit_add_to_dbus_queue(u);
1305 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1306 Mount *m = MOUNT(u);
1309 assert(elapsed == 1);
1310 assert(w == &m->timer_watch);
1314 case MOUNT_MOUNTING:
1315 case MOUNT_MOUNTING_DONE:
1316 log_warning("%s mounting timed out. Stopping.", u->id);
1317 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1320 case MOUNT_REMOUNTING:
1321 log_warning("%s remounting timed out. Stopping.", u->id);
1322 m->reload_result = MOUNT_FAILURE_TIMEOUT;
1323 mount_enter_mounted(m, MOUNT_SUCCESS);
1326 case MOUNT_UNMOUNTING:
1327 log_warning("%s unmounting timed out. Stopping.", u->id);
1328 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
1331 case MOUNT_MOUNTING_SIGTERM:
1332 if (m->exec_context.send_sigkill) {
1333 log_warning("%s mounting timed out. Killing.", u->id);
1334 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1336 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->id);
1338 if (m->from_proc_self_mountinfo)
1339 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1341 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1345 case MOUNT_REMOUNTING_SIGTERM:
1346 if (m->exec_context.send_sigkill) {
1347 log_warning("%s remounting timed out. Killing.", u->id);
1348 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1350 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->id);
1352 if (m->from_proc_self_mountinfo)
1353 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1355 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1359 case MOUNT_UNMOUNTING_SIGTERM:
1360 if (m->exec_context.send_sigkill) {
1361 log_warning("%s unmounting timed out. Killing.", u->id);
1362 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
1364 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->id);
1366 if (m->from_proc_self_mountinfo)
1367 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1369 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1373 case MOUNT_MOUNTING_SIGKILL:
1374 case MOUNT_REMOUNTING_SIGKILL:
1375 case MOUNT_UNMOUNTING_SIGKILL:
1376 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->id);
1378 if (m->from_proc_self_mountinfo)
1379 mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
1381 mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
1385 assert_not_reached("Timeout at wrong time.");
1389 static int mount_add_one(
1393 const char *options,
1396 bool from_proc_self_mountinfo,
1401 char *e, *w = NULL, *o = NULL, *f = NULL;
1410 assert(!set_flags || from_proc_self_mountinfo);
1412 /* Ignore API mount points. They should never be referenced in
1413 * dependencies ever. */
1414 if (mount_point_is_api(where) || mount_point_ignore(where))
1417 if (streq(fstype, "autofs"))
1420 /* probably some kind of swap, ignore */
1421 if (!is_path(where))
1424 e = unit_name_from_path(where, ".mount");
1428 u = manager_get_unit(m, e);
1432 u = unit_new(m, sizeof(Mount));
1438 r = unit_add_name(u, e);
1444 MOUNT(u)->where = strdup(where);
1445 if (!MOUNT(u)->where) {
1450 unit_add_to_load_queue(u);
1456 if (!(w = strdup(what)) ||
1457 !(o = strdup(options)) ||
1458 !(f = strdup(fstype))) {
1463 if (from_proc_self_mountinfo) {
1464 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1467 MOUNT(u)->is_mounted = true;
1468 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1469 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1472 MOUNT(u)->from_proc_self_mountinfo = true;
1474 p = &MOUNT(u)->parameters_etc_fstab;
1475 MOUNT(u)->from_etc_fstab = true;
1489 unit_add_to_dbus_queue(u);
1504 static int mount_find_pri(char *options) {
1508 if (!(pri = mount_test_option(options, "pri")))
1514 r = strtoul(pri, &end, 10);
1519 if (end == pri || (*end != ',' && *end != 0))
1525 static int mount_load_etc_fstab(Manager *m) {
1533 if (!(f = setmntent("/etc/fstab", "r")))
1536 while ((me = getmntent(f))) {
1540 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1545 if (!(where = strdup(me->mnt_dir))) {
1552 path_kill_slashes(what);
1554 if (where[0] == '/')
1555 path_kill_slashes(where);
1557 if (streq(me->mnt_type, "swap")) {
1560 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1567 !!mount_test_option(me->mnt_opts, "noauto"),
1568 !!mount_test_option(me->mnt_opts, "nofail"),
1569 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1572 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1587 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1590 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1594 rewind(m->proc_self_mountinfo);
1599 device = path = options = options2 = fstype = d = p = o = NULL;
1601 if ((k = fscanf(m->proc_self_mountinfo,
1602 "%*s " /* (1) mount id */
1603 "%*s " /* (2) parent id */
1604 "%*s " /* (3) major:minor */
1605 "%*s " /* (4) root */
1606 "%ms " /* (5) mount point */
1607 "%ms" /* (6) mount options */
1608 "%*[^-]" /* (7) optional fields */
1609 "- " /* (8) separator */
1610 "%ms " /* (9) file system type */
1611 "%ms" /* (10) mount source */
1612 "%ms" /* (11) mount options 2 */
1613 "%*[^\n]", /* some rubbish at the end */
1623 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1627 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1632 if (!(d = cunescape(device)) ||
1633 !(p = cunescape(path))) {
1638 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1665 static void mount_shutdown(Manager *m) {
1668 if (m->proc_self_mountinfo) {
1669 fclose(m->proc_self_mountinfo);
1670 m->proc_self_mountinfo = NULL;
1674 static int mount_enumerate(Manager *m) {
1676 struct epoll_event ev;
1679 if (!m->proc_self_mountinfo) {
1680 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1683 m->mount_watch.type = WATCH_MOUNT;
1684 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1687 ev.events = EPOLLPRI;
1688 ev.data.ptr = &m->mount_watch;
1690 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1694 if ((r = mount_load_etc_fstab(m)) < 0)
1697 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1707 void mount_fd_event(Manager *m, int events) {
1712 assert(events & EPOLLPRI);
1714 /* The manager calls this for every fd event happening on the
1715 * /proc/self/mountinfo file, which informs us about mounting
1718 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1719 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1721 /* Reset flags, just in case, for later calls */
1722 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1723 Mount *mount = MOUNT(u);
1725 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1731 manager_dispatch_load_queue(m);
1733 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
1734 Mount *mount = MOUNT(u);
1736 if (!mount->is_mounted) {
1737 /* This has just been unmounted. */
1739 mount->from_proc_self_mountinfo = false;
1741 switch (mount->state) {
1744 mount_enter_dead(mount, MOUNT_SUCCESS);
1748 mount_set_state(mount, mount->state);
1753 } else if (mount->just_mounted || mount->just_changed) {
1755 /* New or changed mount entry */
1757 switch (mount->state) {
1761 mount_enter_mounted(mount, MOUNT_SUCCESS);
1764 case MOUNT_MOUNTING:
1765 mount_enter_mounting_done(mount);
1769 /* Nothing really changed, but let's
1770 * issue an notification call
1771 * nonetheless, in case somebody is
1772 * waiting for this. (e.g. file system
1773 * ro/rw remounts.) */
1774 mount_set_state(mount, mount->state);
1779 /* Reset the flags for later calls */
1780 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1784 static void mount_reset_failed(Unit *u) {
1785 Mount *m = MOUNT(u);
1789 if (m->state == MOUNT_FAILED)
1790 mount_set_state(m, MOUNT_DEAD);
1792 m->result = MOUNT_SUCCESS;
1793 m->reload_result = MOUNT_SUCCESS;
1796 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1797 Mount *m = MOUNT(u);
1799 Set *pid_set = NULL;
1803 if (who == KILL_MAIN) {
1804 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1808 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1809 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1813 if (who == KILL_CONTROL || who == KILL_ALL)
1814 if (m->control_pid > 0)
1815 if (kill(m->control_pid, signo) < 0)
1818 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
1821 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1824 /* Exclude the control pid from being killed via the cgroup */
1825 if (m->control_pid > 0)
1826 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1831 if ((q = cgroup_bonding_kill_list(UNIT(m)->cgroup_bondings, signo, false, pid_set)) < 0)
1832 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
1843 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1844 [MOUNT_DEAD] = "dead",
1845 [MOUNT_MOUNTING] = "mounting",
1846 [MOUNT_MOUNTING_DONE] = "mounting-done",
1847 [MOUNT_MOUNTED] = "mounted",
1848 [MOUNT_REMOUNTING] = "remounting",
1849 [MOUNT_UNMOUNTING] = "unmounting",
1850 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1851 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1852 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1853 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1854 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1855 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1856 [MOUNT_FAILED] = "failed"
1859 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1861 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1862 [MOUNT_EXEC_MOUNT] = "ExecMount",
1863 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1864 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1867 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1869 static const char* const mount_result_table[_MOUNT_RESULT_MAX] = {
1870 [MOUNT_SUCCESS] = "success",
1871 [MOUNT_FAILURE_RESOURCES] = "resources",
1872 [MOUNT_FAILURE_TIMEOUT] = "timeout",
1873 [MOUNT_FAILURE_EXIT_CODE] = "exit-code",
1874 [MOUNT_FAILURE_SIGNAL] = "signal",
1875 [MOUNT_FAILURE_CORE_DUMP] = "core-dump"
1878 DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult);
1880 const UnitVTable mount_vtable = {
1882 .object_size = sizeof(Mount),
1889 .no_instances = true,
1890 .show_status = true,
1896 .coldplug = mount_coldplug,
1900 .start = mount_start,
1902 .reload = mount_reload,
1906 .serialize = mount_serialize,
1907 .deserialize_item = mount_deserialize_item,
1909 .active_state = mount_active_state,
1910 .sub_state_to_string = mount_sub_state_to_string,
1912 .check_gc = mount_check_gc,
1914 .sigchld_event = mount_sigchld_event,
1915 .timer_event = mount_timer_event,
1917 .reset_failed = mount_reset_failed,
1919 .bus_interface = "org.freedesktop.systemd1.Mount",
1920 .bus_message_handler = bus_mount_message_handler,
1921 .bus_invalidating_properties = bus_mount_invalidating_properties,
1923 .enumerate = mount_enumerate,
1924 .shutdown = mount_shutdown