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"
37 #include "dbus-mount.h"
40 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
41 [MOUNT_DEAD] = UNIT_INACTIVE,
42 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
43 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
44 [MOUNT_MOUNTED] = UNIT_ACTIVE,
45 [MOUNT_REMOUNTING] = UNIT_RELOADING,
46 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
47 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
48 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
49 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
50 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
51 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
52 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
53 [MOUNT_FAILED] = UNIT_FAILED
56 static void mount_init(Unit *u) {
60 assert(u->meta.load_state == UNIT_STUB);
62 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
63 m->directory_mode = 0755;
65 exec_context_init(&m->exec_context);
67 /* We need to make sure that /bin/mount is always called in
68 * the same process group as us, so that the autofs kernel
69 * side doesn't send us another mount request while we are
70 * already trying to comply its last one. */
71 m->exec_context.same_pgrp = true;
73 m->timer_watch.type = WATCH_INVALID;
75 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
78 static void mount_unwatch_control_pid(Mount *m) {
81 if (m->control_pid <= 0)
84 unit_unwatch_pid(UNIT(m), m->control_pid);
88 static void mount_parameters_done(MountParameters *p) {
95 p->what = p->options = p->fstype = NULL;
98 static void mount_done(Unit *u) {
106 mount_parameters_done(&m->parameters_etc_fstab);
107 mount_parameters_done(&m->parameters_proc_self_mountinfo);
108 mount_parameters_done(&m->parameters_fragment);
110 exec_context_done(&m->exec_context);
111 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
112 m->control_command = NULL;
114 mount_unwatch_control_pid(m);
116 unit_unwatch_timer(u, &m->timer_watch);
119 static int mount_add_mount_links(Mount *m) {
125 /* Adds in links to other mount points that might lie below or
126 * above us in the hierarchy */
128 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
129 Mount *n = (Mount*) other;
134 if (n->meta.load_state != UNIT_LOADED)
137 if (path_startswith(m->where, n->where)) {
139 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
142 if (n->from_etc_fstab || n->from_fragment)
143 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
146 } else if (path_startswith(n->where, m->where)) {
148 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
151 if (m->from_etc_fstab || m->from_fragment)
152 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
160 static int mount_add_swap_links(Mount *m) {
166 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
167 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
173 static int mount_add_path_links(Mount *m) {
179 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
180 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
186 static int mount_add_automount_links(Mount *m) {
192 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
193 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
199 static int mount_add_socket_links(Mount *m) {
205 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
206 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
212 static char* mount_test_option(const char *haystack, const char *needle) {
217 /* Like glibc's hasmntopt(), but works on a string, not a
224 me.mnt_opts = (char*) haystack;
226 return hasmntopt(&me, needle);
229 static int mount_add_target_links(Mount *m) {
234 bool noauto, handle, automount, user;
238 if (m->from_fragment)
239 p = &m->parameters_fragment;
240 else if (m->from_etc_fstab)
241 p = &m->parameters_etc_fstab;
245 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
246 user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
247 handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
248 m->meta.manager->mount_auto;
249 automount = !!mount_test_option(p->options, "comment=systemd.automount");
251 if (mount_test_option(p->options, "_netdev") ||
252 fstype_is_network(p->fstype))
253 target = SPECIAL_REMOTE_FS_TARGET;
255 target = SPECIAL_LOCAL_FS_TARGET;
257 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
260 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
263 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
266 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
269 /* Automatically add mount points that aren't natively
270 * configured to local-fs.target */
274 if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
275 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
278 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
282 static int mount_add_device_links(Mount *m) {
288 if (m->from_fragment)
289 p = &m->parameters_fragment;
290 else if (m->from_etc_fstab)
291 p = &m->parameters_etc_fstab;
295 if (!p->what || path_equal(m->where, "/"))
298 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
299 nofail = !!mount_test_option(p->options, "nofail");
301 return unit_add_node_link(UNIT(m), p->what,
303 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM);
306 static int mount_add_default_dependencies(Mount *m) {
311 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
312 !path_equal(m->where, "/")) {
314 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
317 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
324 static int mount_verify(Mount *m) {
329 if (m->meta.load_state != UNIT_LOADED)
332 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
335 if (!(e = unit_name_from_path(m->where, ".mount")))
338 b = unit_has_name(UNIT(m), e);
342 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
346 if (m->meta.fragment_path && !m->parameters_fragment.what) {
347 log_error("%s's What setting is missing. Refusing.", m->meta.id);
351 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
352 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
359 static int mount_load(Unit *u) {
364 assert(u->meta.load_state == UNIT_STUB);
366 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
369 /* This is a new unit? Then let's add in some extras */
370 if (u->meta.load_state == UNIT_LOADED) {
371 const char *what = NULL;
373 if (m->meta.fragment_path)
374 m->from_fragment = true;
377 if (!(m->where = unit_name_to_path(u->meta.id)))
380 path_kill_slashes(m->where);
382 if (!m->meta.description)
383 if ((r = unit_set_description(u, m->where)) < 0)
386 if (m->from_fragment && m->parameters_fragment.what)
387 what = m->parameters_fragment.what;
388 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
389 what = m->parameters_etc_fstab.what;
390 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
391 what = m->parameters_proc_self_mountinfo.what;
393 if ((r = mount_add_device_links(m)) < 0)
396 if ((r = mount_add_mount_links(m)) < 0)
399 if ((r = mount_add_socket_links(m)) < 0)
402 if ((r = mount_add_swap_links(m)) < 0)
405 if ((r = mount_add_path_links(m)) < 0)
408 if ((r = mount_add_automount_links(m)) < 0)
411 if ((r = mount_add_target_links(m)) < 0)
414 if ((r = unit_add_default_cgroup(u)) < 0)
417 if (m->meta.default_dependencies)
418 if ((r = mount_add_default_dependencies(m)) < 0)
422 return mount_verify(m);
425 static int mount_notify_automount(Mount *m, int status) {
431 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
432 return r == -ENOENT ? 0 : r;
434 return automount_send_ready(AUTOMOUNT(p), status);
437 static void mount_set_state(Mount *m, MountState state) {
438 MountState old_state;
441 old_state = m->state;
444 if (state != MOUNT_MOUNTING &&
445 state != MOUNT_MOUNTING_DONE &&
446 state != MOUNT_REMOUNTING &&
447 state != MOUNT_UNMOUNTING &&
448 state != MOUNT_MOUNTING_SIGTERM &&
449 state != MOUNT_MOUNTING_SIGKILL &&
450 state != MOUNT_UNMOUNTING_SIGTERM &&
451 state != MOUNT_UNMOUNTING_SIGKILL &&
452 state != MOUNT_REMOUNTING_SIGTERM &&
453 state != MOUNT_REMOUNTING_SIGKILL) {
454 unit_unwatch_timer(UNIT(m), &m->timer_watch);
455 mount_unwatch_control_pid(m);
456 m->control_command = NULL;
457 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
460 if (state == MOUNT_MOUNTED ||
461 state == MOUNT_REMOUNTING)
462 mount_notify_automount(m, 0);
463 else if (state == MOUNT_DEAD ||
464 state == MOUNT_UNMOUNTING ||
465 state == MOUNT_MOUNTING_SIGTERM ||
466 state == MOUNT_MOUNTING_SIGKILL ||
467 state == MOUNT_REMOUNTING_SIGTERM ||
468 state == MOUNT_REMOUNTING_SIGKILL ||
469 state == MOUNT_UNMOUNTING_SIGTERM ||
470 state == MOUNT_UNMOUNTING_SIGKILL ||
471 state == MOUNT_FAILED)
472 mount_notify_automount(m, -ENODEV);
474 if (state != old_state)
475 log_debug("%s changed %s -> %s",
477 mount_state_to_string(old_state),
478 mount_state_to_string(state));
480 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
483 static int mount_coldplug(Unit *u) {
485 MountState new_state = MOUNT_DEAD;
489 assert(m->state == MOUNT_DEAD);
491 if (m->deserialized_state != m->state)
492 new_state = m->deserialized_state;
493 else if (m->from_proc_self_mountinfo)
494 new_state = MOUNT_MOUNTED;
496 if (new_state != m->state) {
498 if (new_state == MOUNT_MOUNTING ||
499 new_state == MOUNT_MOUNTING_DONE ||
500 new_state == MOUNT_REMOUNTING ||
501 new_state == MOUNT_UNMOUNTING ||
502 new_state == MOUNT_MOUNTING_SIGTERM ||
503 new_state == MOUNT_MOUNTING_SIGKILL ||
504 new_state == MOUNT_UNMOUNTING_SIGTERM ||
505 new_state == MOUNT_UNMOUNTING_SIGKILL ||
506 new_state == MOUNT_REMOUNTING_SIGTERM ||
507 new_state == MOUNT_REMOUNTING_SIGKILL) {
509 if (m->control_pid <= 0)
512 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
515 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
519 mount_set_state(m, new_state);
525 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
532 if (m->from_proc_self_mountinfo)
533 p = &m->parameters_proc_self_mountinfo;
534 else if (m->from_fragment)
535 p = &m->parameters_fragment;
537 p = &m->parameters_etc_fstab;
540 "%sMount State: %s\n"
543 "%sFile System Type: %s\n"
545 "%sFrom /etc/fstab: %s\n"
546 "%sFrom /proc/self/mountinfo: %s\n"
547 "%sFrom fragment: %s\n"
548 "%sDirectoryMode: %04o\n",
549 prefix, mount_state_to_string(m->state),
551 prefix, strna(p->what),
552 prefix, strna(p->fstype),
553 prefix, strna(p->options),
554 prefix, yes_no(m->from_etc_fstab),
555 prefix, yes_no(m->from_proc_self_mountinfo),
556 prefix, yes_no(m->from_fragment),
557 prefix, m->directory_mode);
559 if (m->control_pid > 0)
561 "%sControl PID: %lu\n",
562 prefix, (unsigned long) m->control_pid);
564 exec_context_dump(&m->exec_context, f, prefix);
567 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
575 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
578 if ((r = exec_spawn(c,
582 m->meta.manager->environment,
586 m->meta.manager->confirm_spawn,
587 m->meta.cgroup_bondings,
591 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
592 /* FIXME: we need to do something here */
600 unit_unwatch_timer(UNIT(m), &m->timer_watch);
605 static void mount_enter_dead(Mount *m, bool success) {
611 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
614 static void mount_enter_mounted(Mount *m, bool success) {
620 mount_set_state(m, MOUNT_MOUNTED);
623 static void mount_enter_signal(Mount *m, MountState state, bool success) {
626 bool wait_for_exit = false;
633 if (m->exec_context.kill_mode != KILL_NONE) {
634 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
635 state == MOUNT_UNMOUNTING_SIGTERM ||
636 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
638 if (m->control_pid > 0) {
639 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
641 m->control_pid, sig) < 0 && errno != ESRCH)
643 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
645 wait_for_exit = true;
648 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
650 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
655 /* Exclude the control pid from being killed via the cgroup */
656 if (m->control_pid > 0)
657 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
660 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
661 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
662 log_warning("Failed to kill control group: %s", strerror(-r));
664 wait_for_exit = true;
671 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
674 mount_set_state(m, state);
675 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
676 mount_enter_mounted(m, true);
678 mount_enter_dead(m, true);
683 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
685 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
686 mount_enter_mounted(m, false);
688 mount_enter_dead(m, false);
694 static void mount_enter_unmounting(Mount *m, bool success) {
702 m->control_command_id = MOUNT_EXEC_UNMOUNT;
703 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
705 if ((r = exec_command_set(
712 mount_unwatch_control_pid(m);
714 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
717 mount_set_state(m, MOUNT_UNMOUNTING);
722 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
723 mount_enter_mounted(m, false);
726 static void mount_enter_mounting(Mount *m) {
731 m->control_command_id = MOUNT_EXEC_MOUNT;
732 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
734 mkdir_p(m->where, m->directory_mode);
736 if (m->from_fragment)
737 r = exec_command_set(
740 m->parameters_fragment.what,
742 "-t", m->parameters_fragment.fstype,
743 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
745 else if (m->from_etc_fstab)
746 r = exec_command_set(
757 mount_unwatch_control_pid(m);
759 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
762 mount_set_state(m, MOUNT_MOUNTING);
767 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
768 mount_enter_dead(m, false);
771 static void mount_enter_mounting_done(Mount *m) {
774 mount_set_state(m, MOUNT_MOUNTING_DONE);
777 static void mount_enter_remounting(Mount *m, bool success) {
785 m->control_command_id = MOUNT_EXEC_REMOUNT;
786 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
788 if (m->from_fragment) {
792 if (m->parameters_fragment.options) {
793 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
802 r = exec_command_set(
805 m->parameters_fragment.what,
807 "-t", m->parameters_fragment.fstype,
812 } else if (m->from_etc_fstab)
813 r = exec_command_set(
827 mount_unwatch_control_pid(m);
829 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
832 mount_set_state(m, MOUNT_REMOUNTING);
837 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
838 mount_enter_mounted(m, false);
841 static int mount_start(Unit *u) {
846 /* We cannot fulfill this request right now, try again later
848 if (m->state == MOUNT_UNMOUNTING ||
849 m->state == MOUNT_UNMOUNTING_SIGTERM ||
850 m->state == MOUNT_UNMOUNTING_SIGKILL)
854 if (m->state == MOUNT_MOUNTING ||
855 m->state == MOUNT_MOUNTING_SIGTERM ||
856 m->state == MOUNT_MOUNTING_SIGKILL)
859 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
862 mount_enter_mounting(m);
866 static int mount_stop(Unit *u) {
872 if (m->state == MOUNT_UNMOUNTING ||
873 m->state == MOUNT_UNMOUNTING_SIGKILL ||
874 m->state == MOUNT_UNMOUNTING_SIGTERM)
877 assert(m->state == MOUNT_MOUNTING ||
878 m->state == MOUNT_MOUNTING_DONE ||
879 m->state == MOUNT_MOUNTED ||
880 m->state == MOUNT_MOUNTING_SIGTERM ||
881 m->state == MOUNT_MOUNTING_SIGKILL ||
882 m->state == MOUNT_REMOUNTING ||
883 m->state == MOUNT_REMOUNTING_SIGTERM ||
884 m->state == MOUNT_REMOUNTING_SIGKILL);
886 mount_enter_unmounting(m, true);
890 static int mount_reload(Unit *u) {
895 if (m->state == MOUNT_MOUNTING_DONE)
898 assert(m->state == MOUNT_MOUNTED);
900 mount_enter_remounting(m, true);
904 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
911 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
912 unit_serialize_item(u, f, "failure", yes_no(m->failure));
914 if (m->control_pid > 0)
915 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
917 if (m->control_command_id >= 0)
918 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
923 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
931 if (streq(key, "state")) {
934 if ((state = mount_state_from_string(value)) < 0)
935 log_debug("Failed to parse state value %s", value);
937 m->deserialized_state = state;
938 } else if (streq(key, "failure")) {
941 if ((b = parse_boolean(value)) < 0)
942 log_debug("Failed to parse failure value %s", value);
944 m->failure = b || m->failure;
946 } else if (streq(key, "control-pid")) {
949 if (parse_pid(value, &pid) < 0)
950 log_debug("Failed to parse control-pid value %s", value);
952 m->control_pid = pid;
953 } else if (streq(key, "control-command")) {
956 if ((id = mount_exec_command_from_string(value)) < 0)
957 log_debug("Failed to parse exec-command value %s", value);
959 m->control_command_id = id;
960 m->control_command = m->exec_command + id;
964 log_debug("Unknown serialization key '%s'", key);
969 static UnitActiveState mount_active_state(Unit *u) {
972 return state_translation_table[MOUNT(u)->state];
975 static const char *mount_sub_state_to_string(Unit *u) {
978 return mount_state_to_string(MOUNT(u)->state);
981 static bool mount_check_gc(Unit *u) {
986 return m->from_etc_fstab || m->from_proc_self_mountinfo;
989 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
996 if (pid != m->control_pid)
1001 success = is_clean_exit(code, status);
1002 m->failure = m->failure || !success;
1004 if (m->control_command) {
1005 exec_status_exit(&m->control_command->exec_status, pid, code, status);
1006 m->control_command = NULL;
1007 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1010 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1011 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1013 /* Note that mount(8) returning and the kernel sending us a
1014 * mount table change event might happen out-of-order. If an
1015 * operation succeed we assume the kernel will follow soon too
1016 * and already change into the resulting state. If it fails
1017 * we check if the kernel still knows about the mount. and
1018 * change state accordingly. */
1022 case MOUNT_MOUNTING:
1023 case MOUNT_MOUNTING_DONE:
1024 case MOUNT_MOUNTING_SIGKILL:
1025 case MOUNT_MOUNTING_SIGTERM:
1026 case MOUNT_REMOUNTING:
1027 case MOUNT_REMOUNTING_SIGKILL:
1028 case MOUNT_REMOUNTING_SIGTERM:
1031 mount_enter_mounted(m, true);
1032 else if (m->from_proc_self_mountinfo)
1033 mount_enter_mounted(m, false);
1035 mount_enter_dead(m, false);
1038 case MOUNT_UNMOUNTING:
1039 case MOUNT_UNMOUNTING_SIGKILL:
1040 case MOUNT_UNMOUNTING_SIGTERM:
1043 mount_enter_dead(m, true);
1044 else if (m->from_proc_self_mountinfo)
1045 mount_enter_mounted(m, false);
1047 mount_enter_dead(m, false);
1051 assert_not_reached("Uh, control process died at wrong time.");
1054 /* Notify clients about changed exit status */
1055 unit_add_to_dbus_queue(u);
1058 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1059 Mount *m = MOUNT(u);
1062 assert(elapsed == 1);
1063 assert(w == &m->timer_watch);
1067 case MOUNT_MOUNTING:
1068 case MOUNT_MOUNTING_DONE:
1069 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1070 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1073 case MOUNT_REMOUNTING:
1074 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1075 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1078 case MOUNT_UNMOUNTING:
1079 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1080 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1083 case MOUNT_MOUNTING_SIGTERM:
1084 log_warning("%s mounting timed out. Killing.", u->meta.id);
1085 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1088 case MOUNT_REMOUNTING_SIGTERM:
1089 log_warning("%s remounting timed out. Killing.", u->meta.id);
1090 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1093 case MOUNT_UNMOUNTING_SIGTERM:
1094 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1095 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1098 case MOUNT_MOUNTING_SIGKILL:
1099 case MOUNT_REMOUNTING_SIGKILL:
1100 case MOUNT_UNMOUNTING_SIGKILL:
1101 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1103 if (m->from_proc_self_mountinfo)
1104 mount_enter_mounted(m, false);
1106 mount_enter_dead(m, false);
1110 assert_not_reached("Timeout at wrong time.");
1114 static int mount_add_one(
1118 const char *options,
1120 bool from_proc_self_mountinfo,
1125 char *e, *w = NULL, *o = NULL, *f = NULL;
1134 assert(!set_flags || from_proc_self_mountinfo);
1136 /* Ignore API mount points. They should never be referenced in
1137 * dependencies ever. */
1138 if (mount_point_is_api(where))
1141 if (streq(fstype, "autofs"))
1144 /* probably some kind of swap, ignore */
1145 if (!is_path(where))
1148 if (!(e = unit_name_from_path(where, ".mount")))
1151 if (!(u = manager_get_unit(m, e))) {
1154 if (!(u = unit_new(m))) {
1159 r = unit_add_name(u, e);
1165 if (!(MOUNT(u)->where = strdup(where))) {
1170 unit_add_to_load_queue(u);
1176 if (!(w = strdup(what)) ||
1177 !(o = strdup(options)) ||
1178 !(f = strdup(fstype))) {
1183 if (from_proc_self_mountinfo) {
1184 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1187 MOUNT(u)->is_mounted = true;
1188 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1189 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1192 MOUNT(u)->from_proc_self_mountinfo = true;
1194 p = &MOUNT(u)->parameters_etc_fstab;
1195 MOUNT(u)->from_etc_fstab = true;
1207 unit_add_to_dbus_queue(u);
1222 static char *fstab_node_to_udev_node(char *p) {
1226 /* FIXME: to follow udev's logic 100% we need to leave valid
1227 * UTF8 chars unescaped */
1229 if (startswith(p, "LABEL=")) {
1231 if (!(u = unquote(p+6, "\"\'")))
1234 t = xescape(u, "/ ");
1240 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1249 if (startswith(p, "UUID=")) {
1251 if (!(u = unquote(p+5, "\"\'")))
1254 t = xescape(u, "/ ");
1260 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1272 static int mount_find_pri(char *options) {
1276 if (!(pri = mount_test_option(options, "pri=")))
1282 r = strtoul(pri, &end, 10);
1287 if (end == pri || (*end != ',' && *end != 0))
1293 static int mount_load_etc_fstab(Manager *m) {
1301 if (!(f = setmntent("/etc/fstab", "r")))
1304 while ((me = getmntent(f))) {
1307 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1312 if (!(where = strdup(me->mnt_dir))) {
1319 path_kill_slashes(what);
1321 if (where[0] == '/')
1322 path_kill_slashes(where);
1324 if (streq(me->mnt_type, "swap")) {
1327 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1333 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1334 !!mount_test_option(me->mnt_opts, "nofail"),
1335 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1338 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1354 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1356 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1360 rewind(m->proc_self_mountinfo);
1365 device = path = options = options2 = fstype = d = p = o = NULL;
1367 if ((k = fscanf(m->proc_self_mountinfo,
1368 "%*s " /* (1) mount id */
1369 "%*s " /* (2) parent id */
1370 "%*s " /* (3) major:minor */
1371 "%*s " /* (4) root */
1372 "%ms " /* (5) mount point */
1373 "%ms" /* (6) mount options */
1374 "%*[^-]" /* (7) optional fields */
1375 "- " /* (8) seperator */
1376 "%ms " /* (9) file system type */
1377 "%ms" /* (10) mount source */
1378 "%ms" /* (11) mount options 2 */
1379 "%*[^\n]", /* some rubbish at the end */
1393 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1398 if (!(d = cunescape(device)) ||
1399 !(p = cunescape(path))) {
1404 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1432 static void mount_shutdown(Manager *m) {
1435 if (m->proc_self_mountinfo) {
1436 fclose(m->proc_self_mountinfo);
1437 m->proc_self_mountinfo = NULL;
1441 static int mount_enumerate(Manager *m) {
1443 struct epoll_event ev;
1446 if (!m->proc_self_mountinfo) {
1447 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1450 m->mount_watch.type = WATCH_MOUNT;
1451 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1454 ev.events = EPOLLERR;
1455 ev.data.ptr = &m->mount_watch;
1457 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1461 if ((r = mount_load_etc_fstab(m)) < 0)
1464 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1474 void mount_fd_event(Manager *m, int events) {
1479 assert(events == EPOLLERR);
1481 /* The manager calls this for every fd event happening on the
1482 * /proc/self/mountinfo file, which informs us about mounting
1485 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1486 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1488 /* Reset flags, just in case, for later calls */
1489 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1490 Mount *mount = (Mount*) meta;
1492 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1498 manager_dispatch_load_queue(m);
1500 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1501 Mount *mount = (Mount*) meta;
1503 if (!mount->is_mounted) {
1504 /* This has just been unmounted. */
1506 mount->from_proc_self_mountinfo = false;
1508 switch (mount->state) {
1511 mount_enter_dead(mount, true);
1515 mount_set_state(mount, mount->state);
1520 } else if (mount->just_mounted || mount->just_changed) {
1522 /* New or changed entrymount */
1524 switch (mount->state) {
1528 mount_enter_mounted(mount, true);
1531 case MOUNT_MOUNTING:
1532 mount_enter_mounting_done(mount);
1536 /* Nothing really changed, but let's
1537 * issue an notification call
1538 * nonetheless, in case somebody is
1539 * waiting for this. (e.g. file system
1540 * ro/rw remounts.) */
1541 mount_set_state(mount, mount->state);
1546 /* Reset the flags for later calls */
1547 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1551 static void mount_reset_failed(Unit *u) {
1552 Mount *m = MOUNT(u);
1556 if (m->state == MOUNT_FAILED)
1557 mount_set_state(m, MOUNT_DEAD);
1562 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1563 [MOUNT_DEAD] = "dead",
1564 [MOUNT_MOUNTING] = "mounting",
1565 [MOUNT_MOUNTING_DONE] = "mounting-done",
1566 [MOUNT_MOUNTED] = "mounted",
1567 [MOUNT_REMOUNTING] = "remounting",
1568 [MOUNT_UNMOUNTING] = "unmounting",
1569 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1570 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1571 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1572 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1573 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1574 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1575 [MOUNT_FAILED] = "failed"
1578 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1580 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1581 [MOUNT_EXEC_MOUNT] = "ExecMount",
1582 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1583 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1586 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1588 const UnitVTable mount_vtable = {
1592 .no_instances = true,
1594 .show_status = true,
1600 .coldplug = mount_coldplug,
1604 .start = mount_start,
1606 .reload = mount_reload,
1608 .serialize = mount_serialize,
1609 .deserialize_item = mount_deserialize_item,
1611 .active_state = mount_active_state,
1612 .sub_state_to_string = mount_sub_state_to_string,
1614 .check_gc = mount_check_gc,
1616 .sigchld_event = mount_sigchld_event,
1617 .timer_event = mount_timer_event,
1619 .reset_failed = mount_reset_failed,
1621 .bus_interface = "org.freedesktop.systemd1.Mount",
1622 .bus_message_handler = bus_mount_message_handler,
1623 .bus_invalidating_properties = bus_mount_invalidating_properties,
1625 .enumerate = mount_enumerate,
1626 .shutdown = mount_shutdown