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"
39 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
40 [MOUNT_DEAD] = UNIT_INACTIVE,
41 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
42 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
43 [MOUNT_MOUNTED] = UNIT_ACTIVE,
44 [MOUNT_REMOUNTING] = UNIT_RELOADING,
45 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
46 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
47 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
48 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
49 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
50 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
51 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
52 [MOUNT_FAILED] = UNIT_FAILED
55 static void mount_init(Unit *u) {
59 assert(u->meta.load_state == UNIT_STUB);
61 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
62 m->directory_mode = 0755;
64 exec_context_init(&m->exec_context);
66 /* We need to make sure that /bin/mount is always called in
67 * the same process group as us, so that the autofs kernel
68 * side doesn't send us another mount request while we are
69 * already trying to comply its last one. */
70 m->exec_context.same_pgrp = true;
72 m->timer_watch.type = WATCH_INVALID;
74 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
77 static void mount_unwatch_control_pid(Mount *m) {
80 if (m->control_pid <= 0)
83 unit_unwatch_pid(UNIT(m), m->control_pid);
87 static void mount_parameters_done(MountParameters *p) {
94 p->what = p->options = p->fstype = NULL;
97 static void mount_done(Unit *u) {
105 mount_parameters_done(&m->parameters_etc_fstab);
106 mount_parameters_done(&m->parameters_proc_self_mountinfo);
107 mount_parameters_done(&m->parameters_fragment);
109 exec_context_done(&m->exec_context);
110 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
111 m->control_command = NULL;
113 mount_unwatch_control_pid(m);
115 unit_unwatch_timer(u, &m->timer_watch);
118 static int mount_add_mount_links(Mount *m) {
125 if (m->from_fragment)
126 pm = &m->parameters_fragment;
127 else if (m->from_etc_fstab)
128 pm = &m->parameters_etc_fstab;
132 /* Adds in links to other mount points that might lie below or
133 * above us in the hierarchy */
135 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
136 Mount *n = (Mount*) other;
142 if (n->meta.load_state != UNIT_LOADED)
145 if (n->from_fragment)
146 pn = &n->parameters_fragment;
147 else if (n->from_etc_fstab)
148 pn = &n->parameters_etc_fstab;
152 if (path_startswith(m->where, n->where)) {
154 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
157 if (n->from_etc_fstab || n->from_fragment)
158 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
161 } else if (path_startswith(n->where, m->where)) {
163 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
166 if (m->from_etc_fstab || m->from_fragment)
167 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
170 } else if (pm && path_startswith(pm->what, n->where)) {
172 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
175 if (m->from_etc_fstab || m->from_fragment)
176 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
179 } else if (pn && path_startswith(pn->what, m->where)) {
181 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
184 if (n->from_etc_fstab || n->from_fragment)
185 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
193 static int mount_add_swap_links(Mount *m) {
199 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
200 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
206 static int mount_add_path_links(Mount *m) {
212 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
213 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
219 static int mount_add_automount_links(Mount *m) {
225 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
226 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
232 static int mount_add_socket_links(Mount *m) {
238 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
239 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
245 static char* mount_test_option(const char *haystack, const char *needle) {
250 /* Like glibc's hasmntopt(), but works on a string, not a
257 me.mnt_opts = (char*) haystack;
259 return hasmntopt(&me, needle);
262 static int mount_add_target_links(Mount *m) {
267 bool noauto, handle, automount, user;
271 if (m->from_fragment)
272 p = &m->parameters_fragment;
273 else if (m->from_etc_fstab)
274 p = &m->parameters_etc_fstab;
278 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
279 user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
280 handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
281 m->meta.manager->mount_auto;
282 automount = !!mount_test_option(p->options, "comment=systemd.automount");
284 if (mount_test_option(p->options, "_netdev") ||
285 fstype_is_network(p->fstype))
286 target = SPECIAL_REMOTE_FS_TARGET;
288 target = SPECIAL_LOCAL_FS_TARGET;
290 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
293 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
296 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
299 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
302 /* Automatically add mount points that aren't natively
303 * configured to local-fs.target */
307 if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
308 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
311 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
315 static bool mount_is_bind(MountParameters *p) {
318 if (p->fstype && streq(p->fstype, "bind"))
321 if (mount_test_option(p->options, "bind"))
327 static int mount_add_device_links(Mount *m) {
333 if (m->from_fragment)
334 p = &m->parameters_fragment;
335 else if (m->from_etc_fstab)
336 p = &m->parameters_etc_fstab;
340 if (!p->what || path_equal(m->where, "/"))
343 if (mount_is_bind(p))
346 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
347 nofail = !!mount_test_option(p->options, "nofail");
349 return unit_add_node_link(UNIT(m), p->what,
351 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM);
354 static int mount_add_default_dependencies(Mount *m) {
359 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
360 !path_equal(m->where, "/")) {
362 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
365 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
372 static int mount_verify(Mount *m) {
377 if (m->meta.load_state != UNIT_LOADED)
380 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
383 if (!(e = unit_name_from_path(m->where, ".mount")))
386 b = unit_has_name(UNIT(m), e);
390 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
394 if (m->meta.fragment_path && !m->parameters_fragment.what) {
395 log_error("%s's What setting is missing. Refusing.", m->meta.id);
399 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
400 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
407 static int mount_load(Unit *u) {
412 assert(u->meta.load_state == UNIT_STUB);
414 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
417 /* This is a new unit? Then let's add in some extras */
418 if (u->meta.load_state == UNIT_LOADED) {
419 const char *what = NULL;
421 if (m->meta.fragment_path)
422 m->from_fragment = true;
425 if (!(m->where = unit_name_to_path(u->meta.id)))
428 path_kill_slashes(m->where);
430 if (!m->meta.description)
431 if ((r = unit_set_description(u, m->where)) < 0)
434 if (m->from_fragment && m->parameters_fragment.what)
435 what = m->parameters_fragment.what;
436 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
437 what = m->parameters_etc_fstab.what;
438 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
439 what = m->parameters_proc_self_mountinfo.what;
441 if ((r = mount_add_device_links(m)) < 0)
444 if ((r = mount_add_mount_links(m)) < 0)
447 if ((r = mount_add_socket_links(m)) < 0)
450 if ((r = mount_add_swap_links(m)) < 0)
453 if ((r = mount_add_path_links(m)) < 0)
456 if ((r = mount_add_automount_links(m)) < 0)
459 if ((r = mount_add_target_links(m)) < 0)
462 if ((r = unit_add_default_cgroup(u)) < 0)
465 if (m->meta.default_dependencies)
466 if ((r = mount_add_default_dependencies(m)) < 0)
470 return mount_verify(m);
473 static int mount_notify_automount(Mount *m, int status) {
479 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
480 return r == -ENOENT ? 0 : r;
482 return automount_send_ready(AUTOMOUNT(p), status);
485 static void mount_set_state(Mount *m, MountState state) {
486 MountState old_state;
489 old_state = m->state;
492 if (state != MOUNT_MOUNTING &&
493 state != MOUNT_MOUNTING_DONE &&
494 state != MOUNT_REMOUNTING &&
495 state != MOUNT_UNMOUNTING &&
496 state != MOUNT_MOUNTING_SIGTERM &&
497 state != MOUNT_MOUNTING_SIGKILL &&
498 state != MOUNT_UNMOUNTING_SIGTERM &&
499 state != MOUNT_UNMOUNTING_SIGKILL &&
500 state != MOUNT_REMOUNTING_SIGTERM &&
501 state != MOUNT_REMOUNTING_SIGKILL) {
502 unit_unwatch_timer(UNIT(m), &m->timer_watch);
503 mount_unwatch_control_pid(m);
504 m->control_command = NULL;
505 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
508 if (state == MOUNT_MOUNTED ||
509 state == MOUNT_REMOUNTING)
510 mount_notify_automount(m, 0);
511 else if (state == MOUNT_DEAD ||
512 state == MOUNT_UNMOUNTING ||
513 state == MOUNT_MOUNTING_SIGTERM ||
514 state == MOUNT_MOUNTING_SIGKILL ||
515 state == MOUNT_REMOUNTING_SIGTERM ||
516 state == MOUNT_REMOUNTING_SIGKILL ||
517 state == MOUNT_UNMOUNTING_SIGTERM ||
518 state == MOUNT_UNMOUNTING_SIGKILL ||
519 state == MOUNT_FAILED)
520 mount_notify_automount(m, -ENODEV);
522 if (state != old_state)
523 log_debug("%s changed %s -> %s",
525 mount_state_to_string(old_state),
526 mount_state_to_string(state));
528 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
531 static int mount_coldplug(Unit *u) {
533 MountState new_state = MOUNT_DEAD;
537 assert(m->state == MOUNT_DEAD);
539 if (m->deserialized_state != m->state)
540 new_state = m->deserialized_state;
541 else if (m->from_proc_self_mountinfo)
542 new_state = MOUNT_MOUNTED;
544 if (new_state != m->state) {
546 if (new_state == MOUNT_MOUNTING ||
547 new_state == MOUNT_MOUNTING_DONE ||
548 new_state == MOUNT_REMOUNTING ||
549 new_state == MOUNT_UNMOUNTING ||
550 new_state == MOUNT_MOUNTING_SIGTERM ||
551 new_state == MOUNT_MOUNTING_SIGKILL ||
552 new_state == MOUNT_UNMOUNTING_SIGTERM ||
553 new_state == MOUNT_UNMOUNTING_SIGKILL ||
554 new_state == MOUNT_REMOUNTING_SIGTERM ||
555 new_state == MOUNT_REMOUNTING_SIGKILL) {
557 if (m->control_pid <= 0)
560 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
563 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
567 mount_set_state(m, new_state);
573 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
580 if (m->from_proc_self_mountinfo)
581 p = &m->parameters_proc_self_mountinfo;
582 else if (m->from_fragment)
583 p = &m->parameters_fragment;
585 p = &m->parameters_etc_fstab;
588 "%sMount State: %s\n"
591 "%sFile System Type: %s\n"
593 "%sFrom /etc/fstab: %s\n"
594 "%sFrom /proc/self/mountinfo: %s\n"
595 "%sFrom fragment: %s\n"
596 "%sDirectoryMode: %04o\n",
597 prefix, mount_state_to_string(m->state),
599 prefix, strna(p->what),
600 prefix, strna(p->fstype),
601 prefix, strna(p->options),
602 prefix, yes_no(m->from_etc_fstab),
603 prefix, yes_no(m->from_proc_self_mountinfo),
604 prefix, yes_no(m->from_fragment),
605 prefix, m->directory_mode);
607 if (m->control_pid > 0)
609 "%sControl PID: %lu\n",
610 prefix, (unsigned long) m->control_pid);
612 exec_context_dump(&m->exec_context, f, prefix);
615 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
623 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
626 if ((r = exec_spawn(c,
630 m->meta.manager->environment,
634 m->meta.manager->confirm_spawn,
635 m->meta.cgroup_bondings,
639 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
640 /* FIXME: we need to do something here */
648 unit_unwatch_timer(UNIT(m), &m->timer_watch);
653 static void mount_enter_dead(Mount *m, bool success) {
659 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
662 static void mount_enter_mounted(Mount *m, bool success) {
668 mount_set_state(m, MOUNT_MOUNTED);
671 static void mount_enter_signal(Mount *m, MountState state, bool success) {
674 bool wait_for_exit = false;
681 if (m->exec_context.kill_mode != KILL_NONE) {
682 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
683 state == MOUNT_UNMOUNTING_SIGTERM ||
684 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
686 if (m->control_pid > 0) {
687 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
689 m->control_pid, sig) < 0 && errno != ESRCH)
691 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
693 wait_for_exit = true;
696 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
698 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
703 /* Exclude the control pid from being killed via the cgroup */
704 if (m->control_pid > 0)
705 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
708 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
709 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
710 log_warning("Failed to kill control group: %s", strerror(-r));
712 wait_for_exit = true;
719 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
722 mount_set_state(m, state);
723 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
724 mount_enter_mounted(m, true);
726 mount_enter_dead(m, true);
731 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
733 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
734 mount_enter_mounted(m, false);
736 mount_enter_dead(m, false);
742 static void mount_enter_unmounting(Mount *m, bool success) {
750 m->control_command_id = MOUNT_EXEC_UNMOUNT;
751 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
753 if ((r = exec_command_set(
760 mount_unwatch_control_pid(m);
762 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
765 mount_set_state(m, MOUNT_UNMOUNTING);
770 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
771 mount_enter_mounted(m, false);
774 static void mount_enter_mounting(Mount *m) {
779 m->control_command_id = MOUNT_EXEC_MOUNT;
780 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
782 mkdir_p(m->where, m->directory_mode);
784 if (m->from_fragment)
785 r = exec_command_set(
788 m->parameters_fragment.what,
790 "-t", m->parameters_fragment.fstype,
791 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
793 else if (m->from_etc_fstab)
794 r = exec_command_set(
805 mount_unwatch_control_pid(m);
807 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
810 mount_set_state(m, MOUNT_MOUNTING);
815 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
816 mount_enter_dead(m, false);
819 static void mount_enter_mounting_done(Mount *m) {
822 mount_set_state(m, MOUNT_MOUNTING_DONE);
825 static void mount_enter_remounting(Mount *m, bool success) {
833 m->control_command_id = MOUNT_EXEC_REMOUNT;
834 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
836 if (m->from_fragment) {
840 if (m->parameters_fragment.options) {
841 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
850 r = exec_command_set(
853 m->parameters_fragment.what,
855 "-t", m->parameters_fragment.fstype,
860 } else if (m->from_etc_fstab)
861 r = exec_command_set(
875 mount_unwatch_control_pid(m);
877 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
880 mount_set_state(m, MOUNT_REMOUNTING);
885 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
886 mount_enter_mounted(m, false);
889 static int mount_start(Unit *u) {
894 /* We cannot fulfill this request right now, try again later
896 if (m->state == MOUNT_UNMOUNTING ||
897 m->state == MOUNT_UNMOUNTING_SIGTERM ||
898 m->state == MOUNT_UNMOUNTING_SIGKILL)
902 if (m->state == MOUNT_MOUNTING ||
903 m->state == MOUNT_MOUNTING_SIGTERM ||
904 m->state == MOUNT_MOUNTING_SIGKILL)
907 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
910 mount_enter_mounting(m);
914 static int mount_stop(Unit *u) {
920 if (m->state == MOUNT_UNMOUNTING ||
921 m->state == MOUNT_UNMOUNTING_SIGKILL ||
922 m->state == MOUNT_UNMOUNTING_SIGTERM)
925 assert(m->state == MOUNT_MOUNTING ||
926 m->state == MOUNT_MOUNTING_DONE ||
927 m->state == MOUNT_MOUNTED ||
928 m->state == MOUNT_MOUNTING_SIGTERM ||
929 m->state == MOUNT_MOUNTING_SIGKILL ||
930 m->state == MOUNT_REMOUNTING ||
931 m->state == MOUNT_REMOUNTING_SIGTERM ||
932 m->state == MOUNT_REMOUNTING_SIGKILL);
934 mount_enter_unmounting(m, true);
938 static int mount_reload(Unit *u) {
943 if (m->state == MOUNT_MOUNTING_DONE)
946 assert(m->state == MOUNT_MOUNTED);
948 mount_enter_remounting(m, true);
952 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
959 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
960 unit_serialize_item(u, f, "failure", yes_no(m->failure));
962 if (m->control_pid > 0)
963 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
965 if (m->control_command_id >= 0)
966 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
971 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
979 if (streq(key, "state")) {
982 if ((state = mount_state_from_string(value)) < 0)
983 log_debug("Failed to parse state value %s", value);
985 m->deserialized_state = state;
986 } else if (streq(key, "failure")) {
989 if ((b = parse_boolean(value)) < 0)
990 log_debug("Failed to parse failure value %s", value);
992 m->failure = b || m->failure;
994 } else if (streq(key, "control-pid")) {
997 if (parse_pid(value, &pid) < 0)
998 log_debug("Failed to parse control-pid value %s", value);
1000 m->control_pid = pid;
1001 } else if (streq(key, "control-command")) {
1002 MountExecCommand id;
1004 if ((id = mount_exec_command_from_string(value)) < 0)
1005 log_debug("Failed to parse exec-command value %s", value);
1007 m->control_command_id = id;
1008 m->control_command = m->exec_command + id;
1012 log_debug("Unknown serialization key '%s'", key);
1017 static UnitActiveState mount_active_state(Unit *u) {
1020 return state_translation_table[MOUNT(u)->state];
1023 static const char *mount_sub_state_to_string(Unit *u) {
1026 return mount_state_to_string(MOUNT(u)->state);
1029 static bool mount_check_gc(Unit *u) {
1030 Mount *m = MOUNT(u);
1034 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1037 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1038 Mount *m = MOUNT(u);
1044 if (pid != m->control_pid)
1049 success = is_clean_exit(code, status);
1050 m->failure = m->failure || !success;
1052 if (m->control_command) {
1053 exec_status_exit(&m->control_command->exec_status, pid, code, status);
1054 m->control_command = NULL;
1055 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1058 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1059 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1061 /* Note that mount(8) returning and the kernel sending us a
1062 * mount table change event might happen out-of-order. If an
1063 * operation succeed we assume the kernel will follow soon too
1064 * and already change into the resulting state. If it fails
1065 * we check if the kernel still knows about the mount. and
1066 * change state accordingly. */
1070 case MOUNT_MOUNTING:
1071 case MOUNT_MOUNTING_DONE:
1072 case MOUNT_MOUNTING_SIGKILL:
1073 case MOUNT_MOUNTING_SIGTERM:
1074 case MOUNT_REMOUNTING:
1075 case MOUNT_REMOUNTING_SIGKILL:
1076 case MOUNT_REMOUNTING_SIGTERM:
1079 mount_enter_mounted(m, true);
1080 else if (m->from_proc_self_mountinfo)
1081 mount_enter_mounted(m, false);
1083 mount_enter_dead(m, false);
1086 case MOUNT_UNMOUNTING:
1087 case MOUNT_UNMOUNTING_SIGKILL:
1088 case MOUNT_UNMOUNTING_SIGTERM:
1091 mount_enter_dead(m, true);
1092 else if (m->from_proc_self_mountinfo)
1093 mount_enter_mounted(m, false);
1095 mount_enter_dead(m, false);
1099 assert_not_reached("Uh, control process died at wrong time.");
1102 /* Notify clients about changed exit status */
1103 unit_add_to_dbus_queue(u);
1106 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1107 Mount *m = MOUNT(u);
1110 assert(elapsed == 1);
1111 assert(w == &m->timer_watch);
1115 case MOUNT_MOUNTING:
1116 case MOUNT_MOUNTING_DONE:
1117 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1118 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1121 case MOUNT_REMOUNTING:
1122 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1123 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1126 case MOUNT_UNMOUNTING:
1127 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1128 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1131 case MOUNT_MOUNTING_SIGTERM:
1132 log_warning("%s mounting timed out. Killing.", u->meta.id);
1133 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1136 case MOUNT_REMOUNTING_SIGTERM:
1137 log_warning("%s remounting timed out. Killing.", u->meta.id);
1138 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1141 case MOUNT_UNMOUNTING_SIGTERM:
1142 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1143 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1146 case MOUNT_MOUNTING_SIGKILL:
1147 case MOUNT_REMOUNTING_SIGKILL:
1148 case MOUNT_UNMOUNTING_SIGKILL:
1149 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1151 if (m->from_proc_self_mountinfo)
1152 mount_enter_mounted(m, false);
1154 mount_enter_dead(m, false);
1158 assert_not_reached("Timeout at wrong time.");
1162 static int mount_add_one(
1166 const char *options,
1168 bool from_proc_self_mountinfo,
1173 char *e, *w = NULL, *o = NULL, *f = NULL;
1182 assert(!set_flags || from_proc_self_mountinfo);
1184 /* Ignore API mount points. They should never be referenced in
1185 * dependencies ever. */
1186 if (mount_point_is_api(where))
1189 if (streq(fstype, "autofs"))
1192 /* probably some kind of swap, ignore */
1193 if (!is_path(where))
1196 if (!(e = unit_name_from_path(where, ".mount")))
1199 if (!(u = manager_get_unit(m, e))) {
1202 if (!(u = unit_new(m))) {
1207 r = unit_add_name(u, e);
1213 if (!(MOUNT(u)->where = strdup(where))) {
1218 unit_add_to_load_queue(u);
1224 if (!(w = strdup(what)) ||
1225 !(o = strdup(options)) ||
1226 !(f = strdup(fstype))) {
1231 if (from_proc_self_mountinfo) {
1232 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1235 MOUNT(u)->is_mounted = true;
1236 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1237 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1240 MOUNT(u)->from_proc_self_mountinfo = true;
1242 p = &MOUNT(u)->parameters_etc_fstab;
1243 MOUNT(u)->from_etc_fstab = true;
1255 unit_add_to_dbus_queue(u);
1270 static char *fstab_node_to_udev_node(char *p) {
1274 /* FIXME: to follow udev's logic 100% we need to leave valid
1275 * UTF8 chars unescaped */
1277 if (startswith(p, "LABEL=")) {
1279 if (!(u = unquote(p+6, "\"\'")))
1282 t = xescape(u, "/ ");
1288 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1297 if (startswith(p, "UUID=")) {
1299 if (!(u = unquote(p+5, "\"\'")))
1302 t = xescape(u, "/ ");
1308 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1320 static int mount_find_pri(char *options) {
1324 if (!(pri = mount_test_option(options, "pri=")))
1330 r = strtoul(pri, &end, 10);
1335 if (end == pri || (*end != ',' && *end != 0))
1341 static int mount_load_etc_fstab(Manager *m) {
1349 if (!(f = setmntent("/etc/fstab", "r")))
1352 while ((me = getmntent(f))) {
1355 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1360 if (!(where = strdup(me->mnt_dir))) {
1367 path_kill_slashes(what);
1369 if (where[0] == '/')
1370 path_kill_slashes(where);
1372 if (streq(me->mnt_type, "swap")) {
1375 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1381 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1382 !!mount_test_option(me->mnt_opts, "nofail"),
1383 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1386 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1402 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1404 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1408 rewind(m->proc_self_mountinfo);
1413 device = path = options = options2 = fstype = d = p = o = NULL;
1415 if ((k = fscanf(m->proc_self_mountinfo,
1416 "%*s " /* (1) mount id */
1417 "%*s " /* (2) parent id */
1418 "%*s " /* (3) major:minor */
1419 "%*s " /* (4) root */
1420 "%ms " /* (5) mount point */
1421 "%ms" /* (6) mount options */
1422 "%*[^-]" /* (7) optional fields */
1423 "- " /* (8) seperator */
1424 "%ms " /* (9) file system type */
1425 "%ms" /* (10) mount source */
1426 "%ms" /* (11) mount options 2 */
1427 "%*[^\n]", /* some rubbish at the end */
1441 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1446 if (!(d = cunescape(device)) ||
1447 !(p = cunescape(path))) {
1452 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1480 static void mount_shutdown(Manager *m) {
1483 if (m->proc_self_mountinfo) {
1484 fclose(m->proc_self_mountinfo);
1485 m->proc_self_mountinfo = NULL;
1489 static int mount_enumerate(Manager *m) {
1491 struct epoll_event ev;
1494 if (!m->proc_self_mountinfo) {
1495 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1498 m->mount_watch.type = WATCH_MOUNT;
1499 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1502 ev.events = EPOLLERR;
1503 ev.data.ptr = &m->mount_watch;
1505 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1509 if ((r = mount_load_etc_fstab(m)) < 0)
1512 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1522 void mount_fd_event(Manager *m, int events) {
1527 assert(events == EPOLLERR);
1529 /* The manager calls this for every fd event happening on the
1530 * /proc/self/mountinfo file, which informs us about mounting
1533 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1534 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1536 /* Reset flags, just in case, for later calls */
1537 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1538 Mount *mount = (Mount*) meta;
1540 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1546 manager_dispatch_load_queue(m);
1548 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1549 Mount *mount = (Mount*) meta;
1551 if (!mount->is_mounted) {
1552 /* This has just been unmounted. */
1554 mount->from_proc_self_mountinfo = false;
1556 switch (mount->state) {
1559 mount_enter_dead(mount, true);
1563 mount_set_state(mount, mount->state);
1568 } else if (mount->just_mounted || mount->just_changed) {
1570 /* New or changed entrymount */
1572 switch (mount->state) {
1576 mount_enter_mounted(mount, true);
1579 case MOUNT_MOUNTING:
1580 mount_enter_mounting_done(mount);
1584 /* Nothing really changed, but let's
1585 * issue an notification call
1586 * nonetheless, in case somebody is
1587 * waiting for this. (e.g. file system
1588 * ro/rw remounts.) */
1589 mount_set_state(mount, mount->state);
1594 /* Reset the flags for later calls */
1595 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1599 static void mount_reset_failed(Unit *u) {
1600 Mount *m = MOUNT(u);
1604 if (m->state == MOUNT_FAILED)
1605 mount_set_state(m, MOUNT_DEAD);
1610 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1611 [MOUNT_DEAD] = "dead",
1612 [MOUNT_MOUNTING] = "mounting",
1613 [MOUNT_MOUNTING_DONE] = "mounting-done",
1614 [MOUNT_MOUNTED] = "mounted",
1615 [MOUNT_REMOUNTING] = "remounting",
1616 [MOUNT_UNMOUNTING] = "unmounting",
1617 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1618 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1619 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1620 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1621 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1622 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1623 [MOUNT_FAILED] = "failed"
1626 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1628 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1629 [MOUNT_EXEC_MOUNT] = "ExecMount",
1630 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1631 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1634 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1636 const UnitVTable mount_vtable = {
1640 .no_instances = true,
1642 .show_status = true,
1648 .coldplug = mount_coldplug,
1652 .start = mount_start,
1654 .reload = mount_reload,
1656 .serialize = mount_serialize,
1657 .deserialize_item = mount_deserialize_item,
1659 .active_state = mount_active_state,
1660 .sub_state_to_string = mount_sub_state_to_string,
1662 .check_gc = mount_check_gc,
1664 .sigchld_event = mount_sigchld_event,
1665 .timer_event = mount_timer_event,
1667 .reset_failed = mount_reset_failed,
1669 .bus_interface = "org.freedesktop.systemd1.Mount",
1670 .bus_message_handler = bus_mount_message_handler,
1671 .bus_invalidating_properties = bus_mount_invalidating_properties,
1673 .enumerate = mount_enumerate,
1674 .shutdown = mount_shutdown