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) {
118 /* Try to detach us from the automount unit if there is any */
119 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_AUTOMOUNT]) {
120 Automount *a = (Automount*) other;
126 mount_parameters_done(&m->parameters_etc_fstab);
127 mount_parameters_done(&m->parameters_proc_self_mountinfo);
128 mount_parameters_done(&m->parameters_fragment);
130 exec_context_done(&m->exec_context);
131 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
132 m->control_command = NULL;
134 mount_unwatch_control_pid(m);
136 unit_unwatch_timer(u, &m->timer_watch);
139 static MountParameters* get_mount_parameters_configured(Mount *m) {
142 if (m->from_fragment)
143 return &m->parameters_fragment;
144 else if (m->from_etc_fstab)
145 return &m->parameters_etc_fstab;
150 static MountParameters* get_mount_parameters(Mount *m) {
153 if (m->from_proc_self_mountinfo)
154 return &m->parameters_proc_self_mountinfo;
156 return get_mount_parameters_configured(m);
159 static int mount_add_mount_links(Mount *m) {
166 pm = get_mount_parameters_configured(m);
168 /* Adds in links to other mount points that might lie below or
169 * above us in the hierarchy */
171 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_MOUNT]) {
172 Mount *n = (Mount*) other;
178 if (n->meta.load_state != UNIT_LOADED)
181 pn = get_mount_parameters_configured(n);
183 if (path_startswith(m->where, n->where)) {
185 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
189 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
192 } else if (path_startswith(n->where, m->where)) {
194 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
198 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
201 } else if (pm && path_startswith(pm->what, n->where)) {
203 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
206 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
209 } else if (pn && path_startswith(pn->what, m->where)) {
211 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
214 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
222 static int mount_add_swap_links(Mount *m) {
228 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_SWAP])
229 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
235 static int mount_add_path_links(Mount *m) {
241 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_PATH])
242 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
248 static int mount_add_automount_links(Mount *m) {
254 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_AUTOMOUNT])
255 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
261 static int mount_add_socket_links(Mount *m) {
267 LIST_FOREACH(units_by_type, other, m->meta.manager->units_by_type[UNIT_SOCKET])
268 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
274 static char* mount_test_option(const char *haystack, const char *needle) {
279 /* Like glibc's hasmntopt(), but works on a string, not a
286 me.mnt_opts = (char*) haystack;
288 return hasmntopt(&me, needle);
291 static bool mount_is_network(MountParameters *p) {
294 if (mount_test_option(p->options, "_netdev"))
297 if (p->fstype && fstype_is_network(p->fstype))
303 static bool mount_is_bind(MountParameters *p) {
306 if (mount_test_option(p->options, "bind"))
309 if (p->fstype && streq(p->fstype, "bind"))
315 static bool needs_quota(MountParameters *p) {
318 if (mount_is_network(p))
321 if (mount_is_bind(p))
324 return mount_test_option(p->options, "usrquota") ||
325 mount_test_option(p->options, "grpquota") ||
326 mount_test_option(p->options, "quota") ||
327 mount_test_option(p->options, "usrjquota") ||
328 mount_test_option(p->options, "grpjquota");
331 static int mount_add_fstab_links(Mount *m) {
332 const char *target, *after = NULL, *after2 = NULL;
336 bool noauto, nofail, handle, automount;
340 if (m->meta.manager->running_as != MANAGER_SYSTEM)
343 if (!(p = get_mount_parameters_configured(m)))
346 if (p != &m->parameters_etc_fstab)
349 noauto = !!mount_test_option(p->options, "noauto");
350 nofail = !!mount_test_option(p->options, "nofail");
352 mount_test_option(p->options, "comment=systemd.automount") ||
353 mount_test_option(p->options, "x-systemd-automount");
356 mount_test_option(p->options, "comment=systemd.mount") ||
357 mount_test_option(p->options, "x-systemd-mount") ||
358 m->meta.manager->mount_auto;
360 if (mount_is_network(p)) {
361 target = SPECIAL_REMOTE_FS_TARGET;
362 after = SPECIAL_REMOTE_FS_PRE_TARGET;
363 after2 = SPECIAL_NETWORK_TARGET;
365 target = SPECIAL_LOCAL_FS_TARGET;
366 after = SPECIAL_LOCAL_FS_PRE_TARGET;
369 if (!path_equal(m->where, "/"))
370 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
373 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
377 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
381 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true)) < 0)
387 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
390 /* If auto is configured as well also pull in the
391 * mount right-away, but don't rely on it. */
392 if (!noauto) /* automount + auto */
393 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
396 /* Install automount unit */
397 if (!nofail) /* automount + fail */
398 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(am), true);
399 else /* automount + nofail */
400 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
402 } else if (handle && !noauto) {
404 /* Automatically add mount points that aren't natively
405 * configured to local-fs.target */
407 if (!nofail) /* auto + fail */
408 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
409 else /* auto + nofail */
410 return unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true);
416 static int mount_add_device_links(Mount *m) {
422 if (!(p = get_mount_parameters_configured(m)))
428 if (!mount_is_bind(p) &&
429 !path_equal(m->where, "/") &&
430 p == &m->parameters_etc_fstab) {
433 noauto = !!mount_test_option(p->options, "noauto");
434 nofail = !!mount_test_option(p->options, "nofail");
436 if ((r = unit_add_node_link(UNIT(m), p->what,
438 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
444 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
445 !path_equal(m->where, "/")) {
448 /* Let's add in the fsck service */
450 /* aka SPECIAL_FSCK_SERVICE */
451 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
454 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
455 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
462 SERVICE(fsck)->fsck_passno = p->passno;
464 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
471 static int mount_add_default_dependencies(Mount *m) {
476 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
477 !path_equal(m->where, "/")) {
480 p = get_mount_parameters_configured(m);
482 if (p && needs_quota(p)) {
483 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
484 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
488 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
495 static int mount_fix_timeouts(Mount *m) {
497 const char *timeout = NULL;
506 if (!(p = get_mount_parameters_configured(m)))
509 /* Allow configuration how long we wait for a device that
510 * backs a mount point to show up. This is useful to support
511 * endless device timeouts for devices that show up only after
512 * user input, like crypto devices. */
514 if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
516 else if ((timeout = mount_test_option(p->options, "x-systemd-device-timeout")))
521 t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
525 r = parse_usec(t, &u);
529 log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout);
533 SET_FOREACH(other, m->meta.dependencies[UNIT_AFTER], i) {
534 if (other->meta.type != UNIT_DEVICE)
537 other->meta.job_timeout = u;
543 static int mount_verify(Mount *m) {
548 if (m->meta.load_state != UNIT_LOADED)
551 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
554 if (!(e = unit_name_from_path(m->where, ".mount")))
557 b = unit_has_name(UNIT(m), e);
561 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
565 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
566 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
570 if (m->meta.fragment_path && !m->parameters_fragment.what) {
571 log_error("%s's What setting is missing. Refusing.", m->meta.id);
575 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
576 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
583 static int mount_load(Unit *u) {
588 assert(u->meta.load_state == UNIT_STUB);
590 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
593 /* This is a new unit? Then let's add in some extras */
594 if (u->meta.load_state == UNIT_LOADED) {
595 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
598 if (m->meta.fragment_path)
599 m->from_fragment = true;
600 else if (m->from_etc_fstab)
601 m->meta.default_dependencies = false;
604 if (!(m->where = unit_name_to_path(u->meta.id)))
607 path_kill_slashes(m->where);
609 if (!m->meta.description)
610 if ((r = unit_set_description(u, m->where)) < 0)
613 if ((r = mount_add_device_links(m)) < 0)
616 if ((r = mount_add_mount_links(m)) < 0)
619 if ((r = mount_add_socket_links(m)) < 0)
622 if ((r = mount_add_swap_links(m)) < 0)
625 if ((r = mount_add_path_links(m)) < 0)
628 if ((r = mount_add_automount_links(m)) < 0)
631 if ((r = mount_add_fstab_links(m)) < 0)
634 if (m->meta.default_dependencies)
635 if ((r = mount_add_default_dependencies(m)) < 0)
638 if ((r = unit_add_default_cgroups(u)) < 0)
641 mount_fix_timeouts(m);
644 return mount_verify(m);
647 static int mount_notify_automount(Mount *m, int status) {
653 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
654 return r == -ENOENT ? 0 : r;
656 return automount_send_ready(AUTOMOUNT(p), status);
659 static void mount_set_state(Mount *m, MountState state) {
660 MountState old_state;
663 old_state = m->state;
666 if (state != MOUNT_MOUNTING &&
667 state != MOUNT_MOUNTING_DONE &&
668 state != MOUNT_REMOUNTING &&
669 state != MOUNT_UNMOUNTING &&
670 state != MOUNT_MOUNTING_SIGTERM &&
671 state != MOUNT_MOUNTING_SIGKILL &&
672 state != MOUNT_UNMOUNTING_SIGTERM &&
673 state != MOUNT_UNMOUNTING_SIGKILL &&
674 state != MOUNT_REMOUNTING_SIGTERM &&
675 state != MOUNT_REMOUNTING_SIGKILL) {
676 unit_unwatch_timer(UNIT(m), &m->timer_watch);
677 mount_unwatch_control_pid(m);
678 m->control_command = NULL;
679 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
682 if (state == MOUNT_MOUNTED ||
683 state == MOUNT_REMOUNTING)
684 mount_notify_automount(m, 0);
685 else if (state == MOUNT_DEAD ||
686 state == MOUNT_UNMOUNTING ||
687 state == MOUNT_MOUNTING_SIGTERM ||
688 state == MOUNT_MOUNTING_SIGKILL ||
689 state == MOUNT_REMOUNTING_SIGTERM ||
690 state == MOUNT_REMOUNTING_SIGKILL ||
691 state == MOUNT_UNMOUNTING_SIGTERM ||
692 state == MOUNT_UNMOUNTING_SIGKILL ||
693 state == MOUNT_FAILED)
694 mount_notify_automount(m, -ENODEV);
696 if (state != old_state)
697 log_debug("%s changed %s -> %s",
699 mount_state_to_string(old_state),
700 mount_state_to_string(state));
702 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
703 m->reload_failure = false;
706 static int mount_coldplug(Unit *u) {
708 MountState new_state = MOUNT_DEAD;
712 assert(m->state == MOUNT_DEAD);
714 if (m->deserialized_state != m->state)
715 new_state = m->deserialized_state;
716 else if (m->from_proc_self_mountinfo)
717 new_state = MOUNT_MOUNTED;
719 if (new_state != m->state) {
721 if (new_state == MOUNT_MOUNTING ||
722 new_state == MOUNT_MOUNTING_DONE ||
723 new_state == MOUNT_REMOUNTING ||
724 new_state == MOUNT_UNMOUNTING ||
725 new_state == MOUNT_MOUNTING_SIGTERM ||
726 new_state == MOUNT_MOUNTING_SIGKILL ||
727 new_state == MOUNT_UNMOUNTING_SIGTERM ||
728 new_state == MOUNT_UNMOUNTING_SIGKILL ||
729 new_state == MOUNT_REMOUNTING_SIGTERM ||
730 new_state == MOUNT_REMOUNTING_SIGKILL) {
732 if (m->control_pid <= 0)
735 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
738 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
742 mount_set_state(m, new_state);
748 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
755 p = get_mount_parameters(m);
758 "%sMount State: %s\n"
761 "%sFile System Type: %s\n"
763 "%sFrom /etc/fstab: %s\n"
764 "%sFrom /proc/self/mountinfo: %s\n"
765 "%sFrom fragment: %s\n"
766 "%sDirectoryMode: %04o\n",
767 prefix, mount_state_to_string(m->state),
769 prefix, strna(p->what),
770 prefix, strna(p->fstype),
771 prefix, strna(p->options),
772 prefix, yes_no(m->from_etc_fstab),
773 prefix, yes_no(m->from_proc_self_mountinfo),
774 prefix, yes_no(m->from_fragment),
775 prefix, m->directory_mode);
777 if (m->control_pid > 0)
779 "%sControl PID: %lu\n",
780 prefix, (unsigned long) m->control_pid);
782 exec_context_dump(&m->exec_context, f, prefix);
785 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
793 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
796 if ((r = exec_spawn(c,
800 m->meta.manager->environment,
804 m->meta.manager->confirm_spawn,
805 m->meta.cgroup_bondings,
806 m->meta.cgroup_attributes,
810 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
811 /* FIXME: we need to do something here */
819 unit_unwatch_timer(UNIT(m), &m->timer_watch);
824 static void mount_enter_dead(Mount *m, bool success) {
830 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
833 static void mount_enter_mounted(Mount *m, bool success) {
839 mount_set_state(m, MOUNT_MOUNTED);
842 static void mount_enter_signal(Mount *m, MountState state, bool success) {
845 bool wait_for_exit = false;
852 if (m->exec_context.kill_mode != KILL_NONE) {
853 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
854 state == MOUNT_UNMOUNTING_SIGTERM ||
855 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
857 if (m->control_pid > 0) {
858 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
860 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
862 wait_for_exit = true;
865 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
867 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
872 /* Exclude the control pid from being killed via the cgroup */
873 if (m->control_pid > 0)
874 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
877 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
878 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
879 log_warning("Failed to kill control group: %s", strerror(-r));
881 wait_for_exit = true;
889 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
892 mount_set_state(m, state);
893 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
894 mount_enter_mounted(m, true);
896 mount_enter_dead(m, true);
901 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
903 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
904 mount_enter_mounted(m, false);
906 mount_enter_dead(m, false);
912 static void mount_enter_unmounting(Mount *m, bool success) {
920 m->control_command_id = MOUNT_EXEC_UNMOUNT;
921 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
923 if ((r = exec_command_set(
930 mount_unwatch_control_pid(m);
932 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
935 mount_set_state(m, MOUNT_UNMOUNTING);
940 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
941 mount_enter_mounted(m, false);
944 static void mount_enter_mounting(Mount *m) {
950 m->control_command_id = MOUNT_EXEC_MOUNT;
951 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
953 mkdir_p(m->where, m->directory_mode);
955 /* Create the source directory for bind-mounts if needed */
956 p = get_mount_parameters_configured(m);
957 if (p && mount_is_bind(p))
958 mkdir_p(p->what, m->directory_mode);
960 if (m->from_fragment)
961 r = exec_command_set(
964 m->parameters_fragment.what,
966 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
967 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
969 else if (m->from_etc_fstab)
970 r = exec_command_set(
981 mount_unwatch_control_pid(m);
983 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
986 mount_set_state(m, MOUNT_MOUNTING);
991 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
992 mount_enter_dead(m, false);
995 static void mount_enter_mounting_done(Mount *m) {
998 mount_set_state(m, MOUNT_MOUNTING_DONE);
1001 static void mount_enter_remounting(Mount *m, bool success) {
1009 m->control_command_id = MOUNT_EXEC_REMOUNT;
1010 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
1012 if (m->from_fragment) {
1016 if (m->parameters_fragment.options) {
1017 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
1026 r = exec_command_set(
1029 m->parameters_fragment.what,
1031 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
1036 } else if (m->from_etc_fstab)
1037 r = exec_command_set(
1049 mount_unwatch_control_pid(m);
1051 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
1054 mount_set_state(m, MOUNT_REMOUNTING);
1059 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
1060 m->reload_failure = true;
1061 mount_enter_mounted(m, true);
1064 static int mount_start(Unit *u) {
1065 Mount *m = MOUNT(u);
1069 /* We cannot fulfill this request right now, try again later
1071 if (m->state == MOUNT_UNMOUNTING ||
1072 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1073 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1074 m->state == MOUNT_MOUNTING_SIGTERM ||
1075 m->state == MOUNT_MOUNTING_SIGKILL)
1078 /* Already on it! */
1079 if (m->state == MOUNT_MOUNTING)
1082 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1085 mount_enter_mounting(m);
1089 static int mount_stop(Unit *u) {
1090 Mount *m = MOUNT(u);
1095 if (m->state == MOUNT_UNMOUNTING ||
1096 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1097 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1098 m->state == MOUNT_MOUNTING_SIGTERM ||
1099 m->state == MOUNT_MOUNTING_SIGKILL)
1102 assert(m->state == MOUNT_MOUNTING ||
1103 m->state == MOUNT_MOUNTING_DONE ||
1104 m->state == MOUNT_MOUNTED ||
1105 m->state == MOUNT_REMOUNTING ||
1106 m->state == MOUNT_REMOUNTING_SIGTERM ||
1107 m->state == MOUNT_REMOUNTING_SIGKILL);
1109 mount_enter_unmounting(m, true);
1113 static int mount_reload(Unit *u) {
1114 Mount *m = MOUNT(u);
1118 if (m->state == MOUNT_MOUNTING_DONE)
1121 assert(m->state == MOUNT_MOUNTED);
1123 mount_enter_remounting(m, true);
1127 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1128 Mount *m = MOUNT(u);
1134 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1135 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1137 if (m->control_pid > 0)
1138 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1140 if (m->control_command_id >= 0)
1141 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1146 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1147 Mount *m = MOUNT(u);
1154 if (streq(key, "state")) {
1157 if ((state = mount_state_from_string(value)) < 0)
1158 log_debug("Failed to parse state value %s", value);
1160 m->deserialized_state = state;
1161 } else if (streq(key, "failure")) {
1164 if ((b = parse_boolean(value)) < 0)
1165 log_debug("Failed to parse failure value %s", value);
1167 m->failure = b || m->failure;
1169 } else if (streq(key, "control-pid")) {
1172 if (parse_pid(value, &pid) < 0)
1173 log_debug("Failed to parse control-pid value %s", value);
1175 m->control_pid = pid;
1176 } else if (streq(key, "control-command")) {
1177 MountExecCommand id;
1179 if ((id = mount_exec_command_from_string(value)) < 0)
1180 log_debug("Failed to parse exec-command value %s", value);
1182 m->control_command_id = id;
1183 m->control_command = m->exec_command + id;
1187 log_debug("Unknown serialization key '%s'", key);
1192 static UnitActiveState mount_active_state(Unit *u) {
1195 return state_translation_table[MOUNT(u)->state];
1198 static const char *mount_sub_state_to_string(Unit *u) {
1201 return mount_state_to_string(MOUNT(u)->state);
1204 static bool mount_check_gc(Unit *u) {
1205 Mount *m = MOUNT(u);
1209 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1212 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1213 Mount *m = MOUNT(u);
1219 if (pid != m->control_pid)
1224 success = is_clean_exit(code, status);
1225 m->failure = m->failure || !success;
1227 if (m->control_command) {
1228 exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
1229 m->control_command = NULL;
1230 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1233 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1234 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1236 /* Note that mount(8) returning and the kernel sending us a
1237 * mount table change event might happen out-of-order. If an
1238 * operation succeed we assume the kernel will follow soon too
1239 * and already change into the resulting state. If it fails
1240 * we check if the kernel still knows about the mount. and
1241 * change state accordingly. */
1245 case MOUNT_MOUNTING:
1246 case MOUNT_MOUNTING_DONE:
1247 case MOUNT_MOUNTING_SIGKILL:
1248 case MOUNT_MOUNTING_SIGTERM:
1251 mount_enter_mounted(m, true);
1252 else if (m->from_proc_self_mountinfo)
1253 mount_enter_mounted(m, false);
1255 mount_enter_dead(m, false);
1258 case MOUNT_REMOUNTING:
1259 case MOUNT_REMOUNTING_SIGKILL:
1260 case MOUNT_REMOUNTING_SIGTERM:
1262 m->reload_failure = !success;
1263 if (m->from_proc_self_mountinfo)
1264 mount_enter_mounted(m, true);
1266 mount_enter_dead(m, true);
1270 case MOUNT_UNMOUNTING:
1271 case MOUNT_UNMOUNTING_SIGKILL:
1272 case MOUNT_UNMOUNTING_SIGTERM:
1275 mount_enter_dead(m, true);
1276 else if (m->from_proc_self_mountinfo)
1277 mount_enter_mounted(m, false);
1279 mount_enter_dead(m, false);
1283 assert_not_reached("Uh, control process died at wrong time.");
1286 /* Notify clients about changed exit status */
1287 unit_add_to_dbus_queue(u);
1290 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1291 Mount *m = MOUNT(u);
1294 assert(elapsed == 1);
1295 assert(w == &m->timer_watch);
1299 case MOUNT_MOUNTING:
1300 case MOUNT_MOUNTING_DONE:
1301 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1302 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1305 case MOUNT_REMOUNTING:
1306 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1307 m->reload_failure = true;
1308 mount_enter_mounted(m, true);
1311 case MOUNT_UNMOUNTING:
1312 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1313 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1316 case MOUNT_MOUNTING_SIGTERM:
1317 if (m->exec_context.send_sigkill) {
1318 log_warning("%s mounting timed out. Killing.", u->meta.id);
1319 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1321 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1323 if (m->from_proc_self_mountinfo)
1324 mount_enter_mounted(m, false);
1326 mount_enter_dead(m, false);
1330 case MOUNT_REMOUNTING_SIGTERM:
1331 if (m->exec_context.send_sigkill) {
1332 log_warning("%s remounting timed out. Killing.", u->meta.id);
1333 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1335 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1337 if (m->from_proc_self_mountinfo)
1338 mount_enter_mounted(m, false);
1340 mount_enter_dead(m, false);
1344 case MOUNT_UNMOUNTING_SIGTERM:
1345 if (m->exec_context.send_sigkill) {
1346 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1347 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1349 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1351 if (m->from_proc_self_mountinfo)
1352 mount_enter_mounted(m, false);
1354 mount_enter_dead(m, false);
1358 case MOUNT_MOUNTING_SIGKILL:
1359 case MOUNT_REMOUNTING_SIGKILL:
1360 case MOUNT_UNMOUNTING_SIGKILL:
1361 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1363 if (m->from_proc_self_mountinfo)
1364 mount_enter_mounted(m, false);
1366 mount_enter_dead(m, false);
1370 assert_not_reached("Timeout at wrong time.");
1374 static int mount_add_one(
1378 const char *options,
1381 bool from_proc_self_mountinfo,
1386 char *e, *w = NULL, *o = NULL, *f = NULL;
1395 assert(!set_flags || from_proc_self_mountinfo);
1397 /* Ignore API mount points. They should never be referenced in
1398 * dependencies ever. */
1399 if (mount_point_is_api(where) || mount_point_ignore(where))
1402 if (streq(fstype, "autofs"))
1405 /* probably some kind of swap, ignore */
1406 if (!is_path(where))
1409 if (!(e = unit_name_from_path(where, ".mount")))
1412 if (!(u = manager_get_unit(m, e))) {
1415 if (!(u = unit_new(m))) {
1420 r = unit_add_name(u, e);
1426 if (!(MOUNT(u)->where = strdup(where))) {
1431 unit_add_to_load_queue(u);
1437 if (!(w = strdup(what)) ||
1438 !(o = strdup(options)) ||
1439 !(f = strdup(fstype))) {
1444 if (from_proc_self_mountinfo) {
1445 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1448 MOUNT(u)->is_mounted = true;
1449 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1450 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1453 MOUNT(u)->from_proc_self_mountinfo = true;
1455 p = &MOUNT(u)->parameters_etc_fstab;
1456 MOUNT(u)->from_etc_fstab = true;
1470 unit_add_to_dbus_queue(u);
1485 static int mount_find_pri(char *options) {
1489 if (!(pri = mount_test_option(options, "pri")))
1495 r = strtoul(pri, &end, 10);
1500 if (end == pri || (*end != ',' && *end != 0))
1506 static int mount_load_etc_fstab(Manager *m) {
1514 if (!(f = setmntent("/etc/fstab", "r")))
1517 while ((me = getmntent(f))) {
1521 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1526 if (!(where = strdup(me->mnt_dir))) {
1533 path_kill_slashes(what);
1535 if (where[0] == '/')
1536 path_kill_slashes(where);
1538 if (streq(me->mnt_type, "swap")) {
1541 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1548 !!mount_test_option(me->mnt_opts, "noauto"),
1549 !!mount_test_option(me->mnt_opts, "nofail"),
1550 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1553 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1568 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1571 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1575 rewind(m->proc_self_mountinfo);
1580 device = path = options = options2 = fstype = d = p = o = NULL;
1582 if ((k = fscanf(m->proc_self_mountinfo,
1583 "%*s " /* (1) mount id */
1584 "%*s " /* (2) parent id */
1585 "%*s " /* (3) major:minor */
1586 "%*s " /* (4) root */
1587 "%ms " /* (5) mount point */
1588 "%ms" /* (6) mount options */
1589 "%*[^-]" /* (7) optional fields */
1590 "- " /* (8) separator */
1591 "%ms " /* (9) file system type */
1592 "%ms" /* (10) mount source */
1593 "%ms" /* (11) mount options 2 */
1594 "%*[^\n]", /* some rubbish at the end */
1604 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1608 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1613 if (!(d = cunescape(device)) ||
1614 !(p = cunescape(path))) {
1619 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1646 static void mount_shutdown(Manager *m) {
1649 if (m->proc_self_mountinfo) {
1650 fclose(m->proc_self_mountinfo);
1651 m->proc_self_mountinfo = NULL;
1655 static int mount_enumerate(Manager *m) {
1657 struct epoll_event ev;
1660 if (!m->proc_self_mountinfo) {
1661 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1664 m->mount_watch.type = WATCH_MOUNT;
1665 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1668 ev.events = EPOLLPRI;
1669 ev.data.ptr = &m->mount_watch;
1671 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1675 if ((r = mount_load_etc_fstab(m)) < 0)
1678 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1688 void mount_fd_event(Manager *m, int events) {
1693 assert(events & EPOLLPRI);
1695 /* The manager calls this for every fd event happening on the
1696 * /proc/self/mountinfo file, which informs us about mounting
1699 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1700 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1702 /* Reset flags, just in case, for later calls */
1703 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1704 Mount *mount = (Mount*) meta;
1706 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1712 manager_dispatch_load_queue(m);
1714 LIST_FOREACH(units_by_type, meta, m->units_by_type[UNIT_MOUNT]) {
1715 Mount *mount = (Mount*) meta;
1717 if (!mount->is_mounted) {
1718 /* This has just been unmounted. */
1720 mount->from_proc_self_mountinfo = false;
1722 switch (mount->state) {
1725 mount_enter_dead(mount, true);
1729 mount_set_state(mount, mount->state);
1734 } else if (mount->just_mounted || mount->just_changed) {
1736 /* New or changed mount entry */
1738 switch (mount->state) {
1742 mount_enter_mounted(mount, true);
1745 case MOUNT_MOUNTING:
1746 mount_enter_mounting_done(mount);
1750 /* Nothing really changed, but let's
1751 * issue an notification call
1752 * nonetheless, in case somebody is
1753 * waiting for this. (e.g. file system
1754 * ro/rw remounts.) */
1755 mount_set_state(mount, mount->state);
1760 /* Reset the flags for later calls */
1761 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1765 static void mount_reset_failed(Unit *u) {
1766 Mount *m = MOUNT(u);
1770 if (m->state == MOUNT_FAILED)
1771 mount_set_state(m, MOUNT_DEAD);
1776 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1777 Mount *m = MOUNT(u);
1779 Set *pid_set = NULL;
1783 if (who == KILL_MAIN) {
1784 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1788 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1789 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1793 if (who == KILL_CONTROL || who == KILL_ALL)
1794 if (m->control_pid > 0)
1795 if (kill(m->control_pid, signo) < 0)
1798 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
1801 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1804 /* Exclude the control pid from being killed via the cgroup */
1805 if (m->control_pid > 0)
1806 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1811 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1812 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
1823 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1824 [MOUNT_DEAD] = "dead",
1825 [MOUNT_MOUNTING] = "mounting",
1826 [MOUNT_MOUNTING_DONE] = "mounting-done",
1827 [MOUNT_MOUNTED] = "mounted",
1828 [MOUNT_REMOUNTING] = "remounting",
1829 [MOUNT_UNMOUNTING] = "unmounting",
1830 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1831 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1832 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1833 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1834 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1835 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1836 [MOUNT_FAILED] = "failed"
1839 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1841 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1842 [MOUNT_EXEC_MOUNT] = "ExecMount",
1843 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1844 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1847 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1849 const UnitVTable mount_vtable = {
1857 .no_instances = true,
1858 .show_status = true,
1864 .coldplug = mount_coldplug,
1868 .start = mount_start,
1870 .reload = mount_reload,
1874 .serialize = mount_serialize,
1875 .deserialize_item = mount_deserialize_item,
1877 .active_state = mount_active_state,
1878 .sub_state_to_string = mount_sub_state_to_string,
1880 .check_gc = mount_check_gc,
1882 .sigchld_event = mount_sigchld_event,
1883 .timer_event = mount_timer_event,
1885 .reset_failed = mount_reset_failed,
1887 .bus_interface = "org.freedesktop.systemd1.Mount",
1888 .bus_message_handler = bus_mount_message_handler,
1889 .bus_invalidating_properties = bus_mount_invalidating_properties,
1891 .enumerate = mount_enumerate,
1892 .shutdown = mount_shutdown