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) {
124 /* Adds in links to other mount points that might lie below or
125 * above us in the hierarchy */
127 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
128 Mount *n = (Mount*) other;
133 if (n->meta.load_state != UNIT_LOADED)
136 if (path_startswith(m->where, n->where)) {
138 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
141 if (n->from_etc_fstab || n->from_fragment)
142 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
145 } else if (path_startswith(n->where, m->where)) {
147 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
150 if (m->from_etc_fstab || m->from_fragment)
151 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
159 static int mount_add_swap_links(Mount *m) {
165 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
166 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
172 static int mount_add_path_links(Mount *m) {
178 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
179 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
185 static int mount_add_automount_links(Mount *m) {
191 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
192 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
198 static int mount_add_socket_links(Mount *m) {
204 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
205 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
211 static char* mount_test_option(const char *haystack, const char *needle) {
216 /* Like glibc's hasmntopt(), but works on a string, not a
223 me.mnt_opts = (char*) haystack;
225 return hasmntopt(&me, needle);
228 static int mount_add_target_links(Mount *m) {
233 bool noauto, handle, automount, user;
237 if (m->from_fragment)
238 p = &m->parameters_fragment;
239 else if (m->from_etc_fstab)
240 p = &m->parameters_etc_fstab;
244 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
245 user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
246 handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
247 m->meta.manager->mount_auto;
248 automount = !!mount_test_option(p->options, "comment=systemd.automount");
250 if (mount_test_option(p->options, "_netdev") ||
251 fstype_is_network(p->fstype))
252 target = SPECIAL_REMOTE_FS_TARGET;
254 target = SPECIAL_LOCAL_FS_TARGET;
256 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
259 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
262 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
265 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
268 /* Automatically add mount points that aren't natively
269 * configured to local-fs.target */
273 if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
274 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
277 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
281 static int mount_add_device_links(Mount *m) {
287 if (m->from_fragment)
288 p = &m->parameters_fragment;
289 else if (m->from_etc_fstab)
290 p = &m->parameters_etc_fstab;
294 if (!p->what || path_equal(m->where, "/"))
297 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
298 nofail = !!mount_test_option(p->options, "nofail");
300 return unit_add_node_link(UNIT(m), p->what,
302 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM);
305 static int mount_add_default_dependencies(Mount *m) {
310 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
311 !path_equal(m->where, "/")) {
313 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
316 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
323 static int mount_verify(Mount *m) {
328 if (m->meta.load_state != UNIT_LOADED)
331 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
334 if (!(e = unit_name_from_path(m->where, ".mount")))
337 b = unit_has_name(UNIT(m), e);
341 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
345 if (m->meta.fragment_path && !m->parameters_fragment.what) {
346 log_error("%s's What setting is missing. Refusing.", m->meta.id);
350 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
351 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
358 static int mount_load(Unit *u) {
363 assert(u->meta.load_state == UNIT_STUB);
365 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
368 /* This is a new unit? Then let's add in some extras */
369 if (u->meta.load_state == UNIT_LOADED) {
370 const char *what = NULL;
372 if (m->meta.fragment_path)
373 m->from_fragment = true;
376 if (!(m->where = unit_name_to_path(u->meta.id)))
379 path_kill_slashes(m->where);
381 if (!m->meta.description)
382 if ((r = unit_set_description(u, m->where)) < 0)
385 if (m->from_fragment && m->parameters_fragment.what)
386 what = m->parameters_fragment.what;
387 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
388 what = m->parameters_etc_fstab.what;
389 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
390 what = m->parameters_proc_self_mountinfo.what;
392 if ((r = mount_add_device_links(m)) < 0)
395 if ((r = mount_add_mount_links(m)) < 0)
398 if ((r = mount_add_socket_links(m)) < 0)
401 if ((r = mount_add_swap_links(m)) < 0)
404 if ((r = mount_add_path_links(m)) < 0)
407 if ((r = mount_add_automount_links(m)) < 0)
410 if ((r = mount_add_target_links(m)) < 0)
413 if ((r = unit_add_default_cgroup(u)) < 0)
416 if (m->meta.default_dependencies)
417 if ((r = mount_add_default_dependencies(m)) < 0)
421 return mount_verify(m);
424 static int mount_notify_automount(Mount *m, int status) {
430 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
431 return r == -ENOENT ? 0 : r;
433 return automount_send_ready(AUTOMOUNT(p), status);
436 static void mount_set_state(Mount *m, MountState state) {
437 MountState old_state;
440 old_state = m->state;
443 if (state != MOUNT_MOUNTING &&
444 state != MOUNT_MOUNTING_DONE &&
445 state != MOUNT_REMOUNTING &&
446 state != MOUNT_UNMOUNTING &&
447 state != MOUNT_MOUNTING_SIGTERM &&
448 state != MOUNT_MOUNTING_SIGKILL &&
449 state != MOUNT_UNMOUNTING_SIGTERM &&
450 state != MOUNT_UNMOUNTING_SIGKILL &&
451 state != MOUNT_REMOUNTING_SIGTERM &&
452 state != MOUNT_REMOUNTING_SIGKILL) {
453 unit_unwatch_timer(UNIT(m), &m->timer_watch);
454 mount_unwatch_control_pid(m);
455 m->control_command = NULL;
456 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
459 if (state == MOUNT_MOUNTED ||
460 state == MOUNT_REMOUNTING)
461 mount_notify_automount(m, 0);
462 else if (state == MOUNT_DEAD ||
463 state == MOUNT_UNMOUNTING ||
464 state == MOUNT_MOUNTING_SIGTERM ||
465 state == MOUNT_MOUNTING_SIGKILL ||
466 state == MOUNT_REMOUNTING_SIGTERM ||
467 state == MOUNT_REMOUNTING_SIGKILL ||
468 state == MOUNT_UNMOUNTING_SIGTERM ||
469 state == MOUNT_UNMOUNTING_SIGKILL ||
470 state == MOUNT_FAILED)
471 mount_notify_automount(m, -ENODEV);
473 if (state != old_state)
474 log_debug("%s changed %s -> %s",
476 mount_state_to_string(old_state),
477 mount_state_to_string(state));
479 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
482 static int mount_coldplug(Unit *u) {
484 MountState new_state = MOUNT_DEAD;
488 assert(m->state == MOUNT_DEAD);
490 if (m->deserialized_state != m->state)
491 new_state = m->deserialized_state;
492 else if (m->from_proc_self_mountinfo)
493 new_state = MOUNT_MOUNTED;
495 if (new_state != m->state) {
497 if (new_state == MOUNT_MOUNTING ||
498 new_state == MOUNT_MOUNTING_DONE ||
499 new_state == MOUNT_REMOUNTING ||
500 new_state == MOUNT_UNMOUNTING ||
501 new_state == MOUNT_MOUNTING_SIGTERM ||
502 new_state == MOUNT_MOUNTING_SIGKILL ||
503 new_state == MOUNT_UNMOUNTING_SIGTERM ||
504 new_state == MOUNT_UNMOUNTING_SIGKILL ||
505 new_state == MOUNT_REMOUNTING_SIGTERM ||
506 new_state == MOUNT_REMOUNTING_SIGKILL) {
508 if (m->control_pid <= 0)
511 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
514 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
518 mount_set_state(m, new_state);
524 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
531 if (m->from_proc_self_mountinfo)
532 p = &m->parameters_proc_self_mountinfo;
533 else if (m->from_fragment)
534 p = &m->parameters_fragment;
536 p = &m->parameters_etc_fstab;
539 "%sMount State: %s\n"
542 "%sFile System Type: %s\n"
544 "%sFrom /etc/fstab: %s\n"
545 "%sFrom /proc/self/mountinfo: %s\n"
546 "%sFrom fragment: %s\n"
547 "%sDirectoryMode: %04o\n",
548 prefix, mount_state_to_string(m->state),
550 prefix, strna(p->what),
551 prefix, strna(p->fstype),
552 prefix, strna(p->options),
553 prefix, yes_no(m->from_etc_fstab),
554 prefix, yes_no(m->from_proc_self_mountinfo),
555 prefix, yes_no(m->from_fragment),
556 prefix, m->directory_mode);
558 if (m->control_pid > 0)
560 "%sControl PID: %lu\n",
561 prefix, (unsigned long) m->control_pid);
563 exec_context_dump(&m->exec_context, f, prefix);
566 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
574 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
577 if ((r = exec_spawn(c,
581 m->meta.manager->environment,
585 m->meta.manager->confirm_spawn,
586 m->meta.cgroup_bondings,
590 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
591 /* FIXME: we need to do something here */
599 unit_unwatch_timer(UNIT(m), &m->timer_watch);
604 static void mount_enter_dead(Mount *m, bool success) {
610 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
613 static void mount_enter_mounted(Mount *m, bool success) {
619 mount_set_state(m, MOUNT_MOUNTED);
622 static void mount_enter_signal(Mount *m, MountState state, bool success) {
625 bool wait_for_exit = false;
632 if (m->exec_context.kill_mode != KILL_NONE) {
633 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
634 state == MOUNT_UNMOUNTING_SIGTERM ||
635 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
637 if (m->control_pid > 0) {
638 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
640 m->control_pid, sig) < 0 && errno != ESRCH)
642 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
644 wait_for_exit = true;
647 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
649 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
654 /* Exclude the control pid from being killed via the cgroup */
655 if (m->control_pid > 0)
656 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
659 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
660 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
661 log_warning("Failed to kill control group: %s", strerror(-r));
663 wait_for_exit = true;
670 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
673 mount_set_state(m, state);
674 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
675 mount_enter_mounted(m, true);
677 mount_enter_dead(m, true);
682 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
684 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
685 mount_enter_mounted(m, false);
687 mount_enter_dead(m, false);
693 static void mount_enter_unmounting(Mount *m, bool success) {
701 m->control_command_id = MOUNT_EXEC_UNMOUNT;
702 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
704 if ((r = exec_command_set(
711 mount_unwatch_control_pid(m);
713 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
716 mount_set_state(m, MOUNT_UNMOUNTING);
721 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
722 mount_enter_mounted(m, false);
725 static void mount_enter_mounting(Mount *m) {
730 m->control_command_id = MOUNT_EXEC_MOUNT;
731 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
733 mkdir_p(m->where, m->directory_mode);
735 if (m->from_fragment)
736 r = exec_command_set(
739 m->parameters_fragment.what,
741 "-t", m->parameters_fragment.fstype,
742 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
744 else if (m->from_etc_fstab)
745 r = exec_command_set(
756 mount_unwatch_control_pid(m);
758 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
761 mount_set_state(m, MOUNT_MOUNTING);
766 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
767 mount_enter_dead(m, false);
770 static void mount_enter_mounting_done(Mount *m) {
773 mount_set_state(m, MOUNT_MOUNTING_DONE);
776 static void mount_enter_remounting(Mount *m, bool success) {
784 m->control_command_id = MOUNT_EXEC_REMOUNT;
785 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
787 if (m->from_fragment) {
791 if (m->parameters_fragment.options) {
792 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
801 r = exec_command_set(
804 m->parameters_fragment.what,
806 "-t", m->parameters_fragment.fstype,
811 } else if (m->from_etc_fstab)
812 r = exec_command_set(
826 mount_unwatch_control_pid(m);
828 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
831 mount_set_state(m, MOUNT_REMOUNTING);
836 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
837 mount_enter_mounted(m, false);
840 static int mount_start(Unit *u) {
845 /* We cannot fulfill this request right now, try again later
847 if (m->state == MOUNT_UNMOUNTING ||
848 m->state == MOUNT_UNMOUNTING_SIGTERM ||
849 m->state == MOUNT_UNMOUNTING_SIGKILL)
853 if (m->state == MOUNT_MOUNTING ||
854 m->state == MOUNT_MOUNTING_SIGTERM ||
855 m->state == MOUNT_MOUNTING_SIGKILL)
858 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
861 mount_enter_mounting(m);
865 static int mount_stop(Unit *u) {
871 if (m->state == MOUNT_UNMOUNTING ||
872 m->state == MOUNT_UNMOUNTING_SIGKILL ||
873 m->state == MOUNT_UNMOUNTING_SIGTERM)
876 assert(m->state == MOUNT_MOUNTING ||
877 m->state == MOUNT_MOUNTING_DONE ||
878 m->state == MOUNT_MOUNTED ||
879 m->state == MOUNT_MOUNTING_SIGTERM ||
880 m->state == MOUNT_MOUNTING_SIGKILL ||
881 m->state == MOUNT_REMOUNTING ||
882 m->state == MOUNT_REMOUNTING_SIGTERM ||
883 m->state == MOUNT_REMOUNTING_SIGKILL);
885 mount_enter_unmounting(m, true);
889 static int mount_reload(Unit *u) {
894 if (m->state == MOUNT_MOUNTING_DONE)
897 assert(m->state == MOUNT_MOUNTED);
899 mount_enter_remounting(m, true);
903 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
910 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
911 unit_serialize_item(u, f, "failure", yes_no(m->failure));
913 if (m->control_pid > 0)
914 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
916 if (m->control_command_id >= 0)
917 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
922 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
930 if (streq(key, "state")) {
933 if ((state = mount_state_from_string(value)) < 0)
934 log_debug("Failed to parse state value %s", value);
936 m->deserialized_state = state;
937 } else if (streq(key, "failure")) {
940 if ((b = parse_boolean(value)) < 0)
941 log_debug("Failed to parse failure value %s", value);
943 m->failure = b || m->failure;
945 } else if (streq(key, "control-pid")) {
948 if (parse_pid(value, &pid) < 0)
949 log_debug("Failed to parse control-pid value %s", value);
951 m->control_pid = pid;
952 } else if (streq(key, "control-command")) {
955 if ((id = mount_exec_command_from_string(value)) < 0)
956 log_debug("Failed to parse exec-command value %s", value);
958 m->control_command_id = id;
959 m->control_command = m->exec_command + id;
963 log_debug("Unknown serialization key '%s'", key);
968 static UnitActiveState mount_active_state(Unit *u) {
971 return state_translation_table[MOUNT(u)->state];
974 static const char *mount_sub_state_to_string(Unit *u) {
977 return mount_state_to_string(MOUNT(u)->state);
980 static bool mount_check_gc(Unit *u) {
985 return m->from_etc_fstab || m->from_proc_self_mountinfo;
988 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
995 if (pid != m->control_pid)
1000 success = is_clean_exit(code, status);
1001 m->failure = m->failure || !success;
1003 if (m->control_command) {
1004 exec_status_exit(&m->control_command->exec_status, pid, code, status);
1005 m->control_command = NULL;
1006 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1009 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1010 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1012 /* Note that mount(8) returning and the kernel sending us a
1013 * mount table change event might happen out-of-order. If an
1014 * operation succeed we assume the kernel will follow soon too
1015 * and already change into the resulting state. If it fails
1016 * we check if the kernel still knows about the mount. and
1017 * change state accordingly. */
1021 case MOUNT_MOUNTING:
1022 case MOUNT_MOUNTING_DONE:
1023 case MOUNT_MOUNTING_SIGKILL:
1024 case MOUNT_MOUNTING_SIGTERM:
1025 case MOUNT_REMOUNTING:
1026 case MOUNT_REMOUNTING_SIGKILL:
1027 case MOUNT_REMOUNTING_SIGTERM:
1030 mount_enter_mounted(m, true);
1031 else if (m->from_proc_self_mountinfo)
1032 mount_enter_mounted(m, false);
1034 mount_enter_dead(m, false);
1037 case MOUNT_UNMOUNTING:
1038 case MOUNT_UNMOUNTING_SIGKILL:
1039 case MOUNT_UNMOUNTING_SIGTERM:
1042 mount_enter_dead(m, true);
1043 else if (m->from_proc_self_mountinfo)
1044 mount_enter_mounted(m, false);
1046 mount_enter_dead(m, false);
1050 assert_not_reached("Uh, control process died at wrong time.");
1053 /* Notify clients about changed exit status */
1054 unit_add_to_dbus_queue(u);
1057 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1058 Mount *m = MOUNT(u);
1061 assert(elapsed == 1);
1062 assert(w == &m->timer_watch);
1066 case MOUNT_MOUNTING:
1067 case MOUNT_MOUNTING_DONE:
1068 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1069 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1072 case MOUNT_REMOUNTING:
1073 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1074 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1077 case MOUNT_UNMOUNTING:
1078 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1079 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1082 case MOUNT_MOUNTING_SIGTERM:
1083 log_warning("%s mounting timed out. Killing.", u->meta.id);
1084 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1087 case MOUNT_REMOUNTING_SIGTERM:
1088 log_warning("%s remounting timed out. Killing.", u->meta.id);
1089 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1092 case MOUNT_UNMOUNTING_SIGTERM:
1093 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1094 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1097 case MOUNT_MOUNTING_SIGKILL:
1098 case MOUNT_REMOUNTING_SIGKILL:
1099 case MOUNT_UNMOUNTING_SIGKILL:
1100 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1102 if (m->from_proc_self_mountinfo)
1103 mount_enter_mounted(m, false);
1105 mount_enter_dead(m, false);
1109 assert_not_reached("Timeout at wrong time.");
1113 static int mount_add_one(
1117 const char *options,
1119 bool from_proc_self_mountinfo,
1124 char *e, *w = NULL, *o = NULL, *f = NULL;
1133 assert(!set_flags || from_proc_self_mountinfo);
1135 /* Ignore API mount points. They should never be referenced in
1136 * dependencies ever. */
1137 if (mount_point_is_api(where))
1140 if (streq(fstype, "autofs"))
1143 /* probably some kind of swap, ignore */
1144 if (!is_path(where))
1147 if (!(e = unit_name_from_path(where, ".mount")))
1150 if (!(u = manager_get_unit(m, e))) {
1153 if (!(u = unit_new(m))) {
1158 r = unit_add_name(u, e);
1164 if (!(MOUNT(u)->where = strdup(where))) {
1169 unit_add_to_load_queue(u);
1175 if (!(w = strdup(what)) ||
1176 !(o = strdup(options)) ||
1177 !(f = strdup(fstype))) {
1182 if (from_proc_self_mountinfo) {
1183 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1186 MOUNT(u)->is_mounted = true;
1187 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1188 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1191 MOUNT(u)->from_proc_self_mountinfo = true;
1193 p = &MOUNT(u)->parameters_etc_fstab;
1194 MOUNT(u)->from_etc_fstab = true;
1206 unit_add_to_dbus_queue(u);
1221 static char *fstab_node_to_udev_node(char *p) {
1225 /* FIXME: to follow udev's logic 100% we need to leave valid
1226 * UTF8 chars unescaped */
1228 if (startswith(p, "LABEL=")) {
1230 if (!(u = unquote(p+6, "\"\'")))
1233 t = xescape(u, "/ ");
1239 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1248 if (startswith(p, "UUID=")) {
1250 if (!(u = unquote(p+5, "\"\'")))
1253 t = xescape(u, "/ ");
1259 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1271 static int mount_find_pri(char *options) {
1275 if (!(pri = mount_test_option(options, "pri=")))
1281 r = strtoul(pri, &end, 10);
1286 if (end == pri || (*end != ',' && *end != 0))
1292 static int mount_load_etc_fstab(Manager *m) {
1300 if (!(f = setmntent("/etc/fstab", "r")))
1303 while ((me = getmntent(f))) {
1306 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1311 if (!(where = strdup(me->mnt_dir))) {
1318 path_kill_slashes(what);
1320 if (where[0] == '/')
1321 path_kill_slashes(where);
1323 if (streq(me->mnt_type, "swap")) {
1326 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1332 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1333 !!mount_test_option(me->mnt_opts, "nofail"),
1334 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1337 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1353 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1355 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1359 rewind(m->proc_self_mountinfo);
1364 device = path = options = options2 = fstype = d = p = o = NULL;
1366 if ((k = fscanf(m->proc_self_mountinfo,
1367 "%*s " /* (1) mount id */
1368 "%*s " /* (2) parent id */
1369 "%*s " /* (3) major:minor */
1370 "%*s " /* (4) root */
1371 "%ms " /* (5) mount point */
1372 "%ms" /* (6) mount options */
1373 "%*[^-]" /* (7) optional fields */
1374 "- " /* (8) seperator */
1375 "%ms " /* (9) file system type */
1376 "%ms" /* (10) mount source */
1377 "%ms" /* (11) mount options 2 */
1378 "%*[^\n]", /* some rubbish at the end */
1392 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1397 if (!(d = cunescape(device)) ||
1398 !(p = cunescape(path))) {
1403 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1431 static void mount_shutdown(Manager *m) {
1434 if (m->proc_self_mountinfo) {
1435 fclose(m->proc_self_mountinfo);
1436 m->proc_self_mountinfo = NULL;
1440 static int mount_enumerate(Manager *m) {
1442 struct epoll_event ev;
1445 if (!m->proc_self_mountinfo) {
1446 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1449 m->mount_watch.type = WATCH_MOUNT;
1450 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1453 ev.events = EPOLLERR;
1454 ev.data.ptr = &m->mount_watch;
1456 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1460 if ((r = mount_load_etc_fstab(m)) < 0)
1463 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1473 void mount_fd_event(Manager *m, int events) {
1478 assert(events == EPOLLERR);
1480 /* The manager calls this for every fd event happening on the
1481 * /proc/self/mountinfo file, which informs us about mounting
1484 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1485 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1487 /* Reset flags, just in case, for later calls */
1488 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1489 Mount *mount = (Mount*) meta;
1491 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1497 manager_dispatch_load_queue(m);
1499 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1500 Mount *mount = (Mount*) meta;
1502 if (!mount->is_mounted) {
1503 /* This has just been unmounted. */
1505 mount->from_proc_self_mountinfo = false;
1507 switch (mount->state) {
1510 mount_enter_dead(mount, true);
1514 mount_set_state(mount, mount->state);
1519 } else if (mount->just_mounted || mount->just_changed) {
1521 /* New or changed entrymount */
1523 switch (mount->state) {
1527 mount_enter_mounted(mount, true);
1530 case MOUNT_MOUNTING:
1531 mount_enter_mounting_done(mount);
1535 /* Nothing really changed, but let's
1536 * issue an notification call
1537 * nonetheless, in case somebody is
1538 * waiting for this. (e.g. file system
1539 * ro/rw remounts.) */
1540 mount_set_state(mount, mount->state);
1545 /* Reset the flags for later calls */
1546 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1550 static void mount_reset_failed(Unit *u) {
1551 Mount *m = MOUNT(u);
1555 if (m->state == MOUNT_FAILED)
1556 mount_set_state(m, MOUNT_DEAD);
1561 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1562 [MOUNT_DEAD] = "dead",
1563 [MOUNT_MOUNTING] = "mounting",
1564 [MOUNT_MOUNTING_DONE] = "mounting-done",
1565 [MOUNT_MOUNTED] = "mounted",
1566 [MOUNT_REMOUNTING] = "remounting",
1567 [MOUNT_UNMOUNTING] = "unmounting",
1568 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1569 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1570 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1571 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1572 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1573 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1574 [MOUNT_FAILED] = "failed"
1577 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1579 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1580 [MOUNT_EXEC_MOUNT] = "ExecMount",
1581 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1582 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1585 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1587 const UnitVTable mount_vtable = {
1591 .no_instances = true,
1593 .show_status = true,
1599 .coldplug = mount_coldplug,
1603 .start = mount_start,
1605 .reload = mount_reload,
1607 .serialize = mount_serialize,
1608 .deserialize_item = mount_deserialize_item,
1610 .active_state = mount_active_state,
1611 .sub_state_to_string = mount_sub_state_to_string,
1613 .check_gc = mount_check_gc,
1615 .sigchld_event = mount_sigchld_event,
1616 .timer_event = mount_timer_event,
1618 .reset_failed = mount_reset_failed,
1620 .bus_interface = "org.freedesktop.systemd1.Mount",
1621 .bus_message_handler = bus_mount_message_handler,
1622 .bus_invalidating_properties = bus_mount_invalidating_properties,
1624 .enumerate = mount_enumerate,
1625 .shutdown = mount_shutdown