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") ||
324 mount_test_option(p->options, "quota") ||
325 mount_test_option(p->options, "usrjquota") ||
326 mount_test_option(p->options, "grpjquota");
329 static int mount_add_fstab_links(Mount *m) {
330 const char *target, *after = NULL;
334 bool noauto, nofail, handle, automount;
338 if (m->meta.manager->running_as != MANAGER_SYSTEM)
341 if (!(p = get_mount_parameters_configured(m)))
344 if (p != &m->parameters_etc_fstab)
347 noauto = !!mount_test_option(p->options, "noauto");
348 nofail = !!mount_test_option(p->options, "nofail");
350 mount_test_option(p->options, "comment=systemd.automount") ||
351 mount_test_option(p->options, "x-systemd-automount");
354 mount_test_option(p->options, "comment=systemd.mount") ||
355 mount_test_option(p->options, "x-systemd-mount") ||
356 m->meta.manager->mount_auto;
358 if (mount_is_network(p)) {
359 target = SPECIAL_REMOTE_FS_TARGET;
360 after = SPECIAL_REMOTE_FS_PRE_TARGET;
362 target = SPECIAL_LOCAL_FS_TARGET;
363 after = SPECIAL_LOCAL_FS_PRE_TARGET;
366 if (!path_equal(m->where, "/"))
367 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
370 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
374 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
380 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
383 /* If auto is configured as well also pull in the
384 * mount right-away, but don't rely on it. */
385 if (!noauto) /* automount + auto */
386 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
389 /* Install automount unit */
390 if (!nofail) /* automount + fail */
391 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(am), true);
392 else /* automount + nofail */
393 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
395 } else if (handle && !noauto) {
397 /* Automatically add mount points that aren't natively
398 * configured to local-fs.target */
400 if (!nofail) /* auto + fail */
401 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
402 else /* auto + nofail */
403 return unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true);
409 static int mount_add_device_links(Mount *m) {
415 if (!(p = get_mount_parameters_configured(m)))
421 if (!mount_is_bind(p) &&
422 !path_equal(m->where, "/") &&
423 p == &m->parameters_etc_fstab) {
426 noauto = !!mount_test_option(p->options, "noauto");
427 nofail = !!mount_test_option(p->options, "nofail");
429 if ((r = unit_add_node_link(UNIT(m), p->what,
431 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
437 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
438 !path_equal(m->where, "/")) {
441 /* Let's add in the fsck service */
443 /* aka SPECIAL_FSCK_SERVICE */
444 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
447 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
448 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
455 SERVICE(fsck)->fsck_passno = p->passno;
457 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
464 static int mount_add_default_dependencies(Mount *m) {
469 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
470 !path_equal(m->where, "/")) {
473 p = get_mount_parameters_configured(m);
475 if (p && needs_quota(p)) {
476 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
477 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
481 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
488 static int mount_fix_timeouts(Mount *m) {
490 const char *timeout = NULL;
499 if (!(p = get_mount_parameters_configured(m)))
502 /* Allow configuration how long we wait for a device that
503 * backs a mount point to show up. This is useful to support
504 * endless device timeouts for devices that show up only after
505 * user input, like crypto devices. */
507 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
509 else if ((timeout = mount_test_option(p->options, "x-systemd-device-timeout")))
514 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
518 r = parse_usec(t, &u);
522 log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout);
526 SET_FOREACH(other, m->meta.dependencies[UNIT_AFTER], i) {
527 if (other->meta.type != UNIT_DEVICE)
530 other->meta.job_timeout = u;
536 static int mount_verify(Mount *m) {
541 if (m->meta.load_state != UNIT_LOADED)
544 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
547 if (!(e = unit_name_from_path(m->where, ".mount")))
550 b = unit_has_name(UNIT(m), e);
554 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
558 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
559 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
563 if (m->meta.fragment_path && !m->parameters_fragment.what) {
564 log_error("%s's What setting is missing. Refusing.", m->meta.id);
568 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
569 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
576 static int mount_load(Unit *u) {
581 assert(u->meta.load_state == UNIT_STUB);
583 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
586 /* This is a new unit? Then let's add in some extras */
587 if (u->meta.load_state == UNIT_LOADED) {
588 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
591 if (m->meta.fragment_path)
592 m->from_fragment = true;
593 else if (m->from_etc_fstab)
594 m->meta.default_dependencies = false;
597 if (!(m->where = unit_name_to_path(u->meta.id)))
600 path_kill_slashes(m->where);
602 if (!m->meta.description)
603 if ((r = unit_set_description(u, m->where)) < 0)
606 if ((r = mount_add_device_links(m)) < 0)
609 if ((r = mount_add_mount_links(m)) < 0)
612 if ((r = mount_add_socket_links(m)) < 0)
615 if ((r = mount_add_swap_links(m)) < 0)
618 if ((r = mount_add_path_links(m)) < 0)
621 if ((r = mount_add_automount_links(m)) < 0)
624 if ((r = mount_add_fstab_links(m)) < 0)
627 if (m->meta.default_dependencies)
628 if ((r = mount_add_default_dependencies(m)) < 0)
631 if ((r = unit_add_default_cgroups(u)) < 0)
634 mount_fix_timeouts(m);
637 return mount_verify(m);
640 static int mount_notify_automount(Mount *m, int status) {
646 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
647 return r == -ENOENT ? 0 : r;
649 return automount_send_ready(AUTOMOUNT(p), status);
652 static void mount_set_state(Mount *m, MountState state) {
653 MountState old_state;
656 old_state = m->state;
659 if (state != MOUNT_MOUNTING &&
660 state != MOUNT_MOUNTING_DONE &&
661 state != MOUNT_REMOUNTING &&
662 state != MOUNT_UNMOUNTING &&
663 state != MOUNT_MOUNTING_SIGTERM &&
664 state != MOUNT_MOUNTING_SIGKILL &&
665 state != MOUNT_UNMOUNTING_SIGTERM &&
666 state != MOUNT_UNMOUNTING_SIGKILL &&
667 state != MOUNT_REMOUNTING_SIGTERM &&
668 state != MOUNT_REMOUNTING_SIGKILL) {
669 unit_unwatch_timer(UNIT(m), &m->timer_watch);
670 mount_unwatch_control_pid(m);
671 m->control_command = NULL;
672 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
675 if (state == MOUNT_MOUNTED ||
676 state == MOUNT_REMOUNTING)
677 mount_notify_automount(m, 0);
678 else if (state == MOUNT_DEAD ||
679 state == MOUNT_UNMOUNTING ||
680 state == MOUNT_MOUNTING_SIGTERM ||
681 state == MOUNT_MOUNTING_SIGKILL ||
682 state == MOUNT_REMOUNTING_SIGTERM ||
683 state == MOUNT_REMOUNTING_SIGKILL ||
684 state == MOUNT_UNMOUNTING_SIGTERM ||
685 state == MOUNT_UNMOUNTING_SIGKILL ||
686 state == MOUNT_FAILED)
687 mount_notify_automount(m, -ENODEV);
689 if (state != old_state)
690 log_debug("%s changed %s -> %s",
692 mount_state_to_string(old_state),
693 mount_state_to_string(state));
695 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
696 m->reload_failure = false;
699 static int mount_coldplug(Unit *u) {
701 MountState new_state = MOUNT_DEAD;
705 assert(m->state == MOUNT_DEAD);
707 if (m->deserialized_state != m->state)
708 new_state = m->deserialized_state;
709 else if (m->from_proc_self_mountinfo)
710 new_state = MOUNT_MOUNTED;
712 if (new_state != m->state) {
714 if (new_state == MOUNT_MOUNTING ||
715 new_state == MOUNT_MOUNTING_DONE ||
716 new_state == MOUNT_REMOUNTING ||
717 new_state == MOUNT_UNMOUNTING ||
718 new_state == MOUNT_MOUNTING_SIGTERM ||
719 new_state == MOUNT_MOUNTING_SIGKILL ||
720 new_state == MOUNT_UNMOUNTING_SIGTERM ||
721 new_state == MOUNT_UNMOUNTING_SIGKILL ||
722 new_state == MOUNT_REMOUNTING_SIGTERM ||
723 new_state == MOUNT_REMOUNTING_SIGKILL) {
725 if (m->control_pid <= 0)
728 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
731 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
735 mount_set_state(m, new_state);
741 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
748 p = get_mount_parameters(m);
751 "%sMount State: %s\n"
754 "%sFile System Type: %s\n"
756 "%sFrom /etc/fstab: %s\n"
757 "%sFrom /proc/self/mountinfo: %s\n"
758 "%sFrom fragment: %s\n"
759 "%sDirectoryMode: %04o\n",
760 prefix, mount_state_to_string(m->state),
762 prefix, strna(p->what),
763 prefix, strna(p->fstype),
764 prefix, strna(p->options),
765 prefix, yes_no(m->from_etc_fstab),
766 prefix, yes_no(m->from_proc_self_mountinfo),
767 prefix, yes_no(m->from_fragment),
768 prefix, m->directory_mode);
770 if (m->control_pid > 0)
772 "%sControl PID: %lu\n",
773 prefix, (unsigned long) m->control_pid);
775 exec_context_dump(&m->exec_context, f, prefix);
778 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
786 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
789 if ((r = exec_spawn(c,
793 m->meta.manager->environment,
797 m->meta.manager->confirm_spawn,
798 m->meta.cgroup_bondings,
799 m->meta.cgroup_attributes,
803 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
804 /* FIXME: we need to do something here */
812 unit_unwatch_timer(UNIT(m), &m->timer_watch);
817 static void mount_enter_dead(Mount *m, bool success) {
823 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
826 static void mount_enter_mounted(Mount *m, bool success) {
832 mount_set_state(m, MOUNT_MOUNTED);
835 static void mount_enter_signal(Mount *m, MountState state, bool success) {
838 bool wait_for_exit = false;
845 if (m->exec_context.kill_mode != KILL_NONE) {
846 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
847 state == MOUNT_UNMOUNTING_SIGTERM ||
848 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
850 if (m->control_pid > 0) {
851 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
853 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
855 wait_for_exit = true;
858 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
860 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
865 /* Exclude the control pid from being killed via the cgroup */
866 if (m->control_pid > 0)
867 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
870 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
871 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
872 log_warning("Failed to kill control group: %s", strerror(-r));
874 wait_for_exit = true;
882 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
885 mount_set_state(m, state);
886 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
887 mount_enter_mounted(m, true);
889 mount_enter_dead(m, true);
894 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
896 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
897 mount_enter_mounted(m, false);
899 mount_enter_dead(m, false);
905 static void mount_enter_unmounting(Mount *m, bool success) {
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", m->meta.id, strerror(-r));
934 mount_enter_mounted(m, false);
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", m->meta.id, strerror(-r));
985 mount_enter_dead(m, false);
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, bool success) {
1002 m->control_command_id = MOUNT_EXEC_REMOUNT;
1003 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
1005 if (m->from_fragment) {
1009 if (m->parameters_fragment.options) {
1010 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
1019 r = exec_command_set(
1022 m->parameters_fragment.what,
1024 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1029 } else if (m->from_etc_fstab)
1030 r = exec_command_set(
1042 mount_unwatch_control_pid(m);
1044 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
1047 mount_set_state(m, MOUNT_REMOUNTING);
1052 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
1053 m->reload_failure = true;
1054 mount_enter_mounted(m, true);
1057 static int mount_start(Unit *u) {
1058 Mount *m = MOUNT(u);
1062 /* We cannot fulfill this request right now, try again later
1064 if (m->state == MOUNT_UNMOUNTING ||
1065 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1066 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1067 m->state == MOUNT_MOUNTING_SIGTERM ||
1068 m->state == MOUNT_MOUNTING_SIGKILL)
1071 /* Already on it! */
1072 if (m->state == MOUNT_MOUNTING)
1075 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1078 mount_enter_mounting(m);
1082 static int mount_stop(Unit *u) {
1083 Mount *m = MOUNT(u);
1088 if (m->state == MOUNT_UNMOUNTING ||
1089 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1090 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1091 m->state == MOUNT_MOUNTING_SIGTERM ||
1092 m->state == MOUNT_MOUNTING_SIGKILL)
1095 assert(m->state == MOUNT_MOUNTING ||
1096 m->state == MOUNT_MOUNTING_DONE ||
1097 m->state == MOUNT_MOUNTED ||
1098 m->state == MOUNT_REMOUNTING ||
1099 m->state == MOUNT_REMOUNTING_SIGTERM ||
1100 m->state == MOUNT_REMOUNTING_SIGKILL);
1102 mount_enter_unmounting(m, true);
1106 static int mount_reload(Unit *u) {
1107 Mount *m = MOUNT(u);
1111 if (m->state == MOUNT_MOUNTING_DONE)
1114 assert(m->state == MOUNT_MOUNTED);
1116 mount_enter_remounting(m, true);
1120 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1121 Mount *m = MOUNT(u);
1127 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1128 unit_serialize_item(u, f, "failure", yes_no(m->failure));
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, "failure")) {
1157 if ((b = parse_boolean(value)) < 0)
1158 log_debug("Failed to parse failure value %s", value);
1160 m->failure = b || m->failure;
1162 } else if (streq(key, "control-pid")) {
1165 if (parse_pid(value, &pid) < 0)
1166 log_debug("Failed to parse control-pid value %s", value);
1168 m->control_pid = pid;
1169 } else if (streq(key, "control-command")) {
1170 MountExecCommand id;
1172 if ((id = mount_exec_command_from_string(value)) < 0)
1173 log_debug("Failed to parse exec-command value %s", value);
1175 m->control_command_id = id;
1176 m->control_command = m->exec_command + id;
1180 log_debug("Unknown serialization key '%s'", key);
1185 static UnitActiveState mount_active_state(Unit *u) {
1188 return state_translation_table[MOUNT(u)->state];
1191 static const char *mount_sub_state_to_string(Unit *u) {
1194 return mount_state_to_string(MOUNT(u)->state);
1197 static bool mount_check_gc(Unit *u) {
1198 Mount *m = MOUNT(u);
1202 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1205 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1206 Mount *m = MOUNT(u);
1212 if (pid != m->control_pid)
1217 success = is_clean_exit(code, status);
1218 m->failure = m->failure || !success;
1220 if (m->control_command) {
1221 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1222 m->control_command = NULL;
1223 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1226 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1227 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1229 /* Note that mount(8) returning and the kernel sending us a
1230 * mount table change event might happen out-of-order. If an
1231 * operation succeed we assume the kernel will follow soon too
1232 * and already change into the resulting state. If it fails
1233 * we check if the kernel still knows about the mount. and
1234 * change state accordingly. */
1238 case MOUNT_MOUNTING:
1239 case MOUNT_MOUNTING_DONE:
1240 case MOUNT_MOUNTING_SIGKILL:
1241 case MOUNT_MOUNTING_SIGTERM:
1244 mount_enter_mounted(m, true);
1245 else if (m->from_proc_self_mountinfo)
1246 mount_enter_mounted(m, false);
1248 mount_enter_dead(m, false);
1251 case MOUNT_REMOUNTING:
1252 case MOUNT_REMOUNTING_SIGKILL:
1253 case MOUNT_REMOUNTING_SIGTERM:
1255 m->reload_failure = !success;
1256 if (m->from_proc_self_mountinfo)
1257 mount_enter_mounted(m, true);
1259 mount_enter_dead(m, true);
1263 case MOUNT_UNMOUNTING:
1264 case MOUNT_UNMOUNTING_SIGKILL:
1265 case MOUNT_UNMOUNTING_SIGTERM:
1268 mount_enter_dead(m, true);
1269 else if (m->from_proc_self_mountinfo)
1270 mount_enter_mounted(m, false);
1272 mount_enter_dead(m, false);
1276 assert_not_reached("Uh, control process died at wrong time.");
1279 /* Notify clients about changed exit status */
1280 unit_add_to_dbus_queue(u);
1283 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1284 Mount *m = MOUNT(u);
1287 assert(elapsed == 1);
1288 assert(w == &m->timer_watch);
1292 case MOUNT_MOUNTING:
1293 case MOUNT_MOUNTING_DONE:
1294 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1295 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1298 case MOUNT_REMOUNTING:
1299 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1300 m->reload_failure = true;
1301 mount_enter_mounted(m, true);
1304 case MOUNT_UNMOUNTING:
1305 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1306 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1309 case MOUNT_MOUNTING_SIGTERM:
1310 if (m->exec_context.send_sigkill) {
1311 log_warning("%s mounting timed out. Killing.", u->meta.id);
1312 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1314 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1316 if (m->from_proc_self_mountinfo)
1317 mount_enter_mounted(m, false);
1319 mount_enter_dead(m, false);
1323 case MOUNT_REMOUNTING_SIGTERM:
1324 if (m->exec_context.send_sigkill) {
1325 log_warning("%s remounting timed out. Killing.", u->meta.id);
1326 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1328 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1330 if (m->from_proc_self_mountinfo)
1331 mount_enter_mounted(m, false);
1333 mount_enter_dead(m, false);
1337 case MOUNT_UNMOUNTING_SIGTERM:
1338 if (m->exec_context.send_sigkill) {
1339 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1340 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1342 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1344 if (m->from_proc_self_mountinfo)
1345 mount_enter_mounted(m, false);
1347 mount_enter_dead(m, false);
1351 case MOUNT_MOUNTING_SIGKILL:
1352 case MOUNT_REMOUNTING_SIGKILL:
1353 case MOUNT_UNMOUNTING_SIGKILL:
1354 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1356 if (m->from_proc_self_mountinfo)
1357 mount_enter_mounted(m, false);
1359 mount_enter_dead(m, false);
1363 assert_not_reached("Timeout at wrong time.");
1367 static int mount_add_one(
1371 const char *options,
1374 bool from_proc_self_mountinfo,
1379 char *e, *w = NULL, *o = NULL, *f = NULL;
1388 assert(!set_flags || from_proc_self_mountinfo);
1390 /* Ignore API mount points. They should never be referenced in
1391 * dependencies ever. */
1392 if (mount_point_is_api(where) || mount_point_ignore(where))
1395 if (streq(fstype, "autofs"))
1398 /* probably some kind of swap, ignore */
1399 if (!is_path(where))
1402 if (!(e = unit_name_from_path(where, ".mount")))
1405 if (!(u = manager_get_unit(m, e))) {
1408 if (!(u = unit_new(m))) {
1413 r = unit_add_name(u, e);
1419 if (!(MOUNT(u)->where = strdup(where))) {
1424 unit_add_to_load_queue(u);
1430 if (!(w = strdup(what)) ||
1431 !(o = strdup(options)) ||
1432 !(f = strdup(fstype))) {
1437 if (from_proc_self_mountinfo) {
1438 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1441 MOUNT(u)->is_mounted = true;
1442 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1443 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1446 MOUNT(u)->from_proc_self_mountinfo = true;
1448 p = &MOUNT(u)->parameters_etc_fstab;
1449 MOUNT(u)->from_etc_fstab = true;
1463 unit_add_to_dbus_queue(u);
1478 static int mount_find_pri(char *options) {
1482 if (!(pri = mount_test_option(options, "pri")))
1488 r = strtoul(pri, &end, 10);
1493 if (end == pri || (*end != ',' && *end != 0))
1499 static int mount_load_etc_fstab(Manager *m) {
1507 if (!(f = setmntent("/etc/fstab", "r")))
1510 while ((me = getmntent(f))) {
1514 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1519 if (!(where = strdup(me->mnt_dir))) {
1526 path_kill_slashes(what);
1528 if (where[0] == '/')
1529 path_kill_slashes(where);
1531 if (streq(me->mnt_type, "swap")) {
1534 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1541 !!mount_test_option(me->mnt_opts, "noauto"),
1542 !!mount_test_option(me->mnt_opts, "nofail"),
1543 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1546 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1561 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1564 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1568 rewind(m->proc_self_mountinfo);
1573 device = path = options = options2 = fstype = d = p = o = NULL;
1575 if ((k = fscanf(m->proc_self_mountinfo,
1576 "%*s " /* (1) mount id */
1577 "%*s " /* (2) parent id */
1578 "%*s " /* (3) major:minor */
1579 "%*s " /* (4) root */
1580 "%ms " /* (5) mount point */
1581 "%ms" /* (6) mount options */
1582 "%*[^-]" /* (7) optional fields */
1583 "- " /* (8) separator */
1584 "%ms " /* (9) file system type */
1585 "%ms" /* (10) mount source */
1586 "%ms" /* (11) mount options 2 */
1587 "%*[^\n]", /* some rubbish at the end */
1597 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1601 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1606 if (!(d = cunescape(device)) ||
1607 !(p = cunescape(path))) {
1612 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1639 static void mount_shutdown(Manager *m) {
1642 if (m->proc_self_mountinfo) {
1643 fclose(m->proc_self_mountinfo);
1644 m->proc_self_mountinfo = NULL;
1648 static int mount_enumerate(Manager *m) {
1650 struct epoll_event ev;
1653 if (!m->proc_self_mountinfo) {
1654 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1657 m->mount_watch.type = WATCH_MOUNT;
1658 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1661 ev.events = EPOLLPRI;
1662 ev.data.ptr = &m->mount_watch;
1664 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1668 if ((r = mount_load_etc_fstab(m)) < 0)
1671 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1681 void mount_fd_event(Manager *m, int events) {
1686 assert(events & EPOLLPRI);
1688 /* The manager calls this for every fd event happening on the
1689 * /proc/self/mountinfo file, which informs us about mounting
1692 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1693 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1695 /* Reset flags, just in case, for later calls */
1696 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1697 Mount *mount = (Mount*) meta;
1699 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1705 manager_dispatch_load_queue(m);
1707 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1708 Mount *mount = (Mount*) meta;
1710 if (!mount->is_mounted) {
1711 /* This has just been unmounted. */
1713 mount->from_proc_self_mountinfo = false;
1715 switch (mount->state) {
1718 mount_enter_dead(mount, true);
1722 mount_set_state(mount, mount->state);
1727 } else if (mount->just_mounted || mount->just_changed) {
1729 /* New or changed mount entry */
1731 switch (mount->state) {
1735 mount_enter_mounted(mount, true);
1738 case MOUNT_MOUNTING:
1739 mount_enter_mounting_done(mount);
1743 /* Nothing really changed, but let's
1744 * issue an notification call
1745 * nonetheless, in case somebody is
1746 * waiting for this. (e.g. file system
1747 * ro/rw remounts.) */
1748 mount_set_state(mount, mount->state);
1753 /* Reset the flags for later calls */
1754 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1758 static void mount_reset_failed(Unit *u) {
1759 Mount *m = MOUNT(u);
1763 if (m->state == MOUNT_FAILED)
1764 mount_set_state(m, MOUNT_DEAD);
1769 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1770 Mount *m = MOUNT(u);
1772 Set *pid_set = NULL;
1776 if (who == KILL_MAIN) {
1777 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1781 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1782 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1786 if (who == KILL_CONTROL || who == KILL_ALL)
1787 if (m->control_pid > 0)
1788 if (kill(m->control_pid, signo) < 0)
1791 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
1794 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1797 /* Exclude the control pid from being killed via the cgroup */
1798 if (m->control_pid > 0)
1799 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1804 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1805 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
1816 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1817 [MOUNT_DEAD] = "dead",
1818 [MOUNT_MOUNTING] = "mounting",
1819 [MOUNT_MOUNTING_DONE] = "mounting-done",
1820 [MOUNT_MOUNTED] = "mounted",
1821 [MOUNT_REMOUNTING] = "remounting",
1822 [MOUNT_UNMOUNTING] = "unmounting",
1823 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1824 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1825 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1826 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1827 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1828 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1829 [MOUNT_FAILED] = "failed"
1832 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1834 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1835 [MOUNT_EXEC_MOUNT] = "ExecMount",
1836 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1837 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1840 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1842 const UnitVTable mount_vtable = {
1850 .no_instances = true,
1851 .show_status = true,
1857 .coldplug = mount_coldplug,
1861 .start = mount_start,
1863 .reload = mount_reload,
1867 .serialize = mount_serialize,
1868 .deserialize_item = mount_deserialize_item,
1870 .active_state = mount_active_state,
1871 .sub_state_to_string = mount_sub_state_to_string,
1873 .check_gc = mount_check_gc,
1875 .sigchld_event = mount_sigchld_event,
1876 .timer_event = mount_timer_event,
1878 .reset_failed = mount_reset_failed,
1880 .bus_interface = "org.freedesktop.systemd1.Mount",
1881 .bus_message_handler = bus_mount_message_handler,
1882 .bus_invalidating_properties = bus_mount_invalidating_properties,
1884 .enumerate = mount_enumerate,
1885 .shutdown = mount_shutdown