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) {
263 const char *target, *after = NULL;
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 (p->fstype && fstype_is_network(p->fstype))) {
286 target = SPECIAL_REMOTE_FS_TARGET;
288 if (m->meta.manager->running_as == MANAGER_SYSTEM)
289 after = SPECIAL_NETWORK_TARGET;
291 target = SPECIAL_LOCAL_FS_TARGET;
293 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
297 if ((r = unit_add_dependency_by_name(tu, UNIT_AFTER, after, NULL, true)) < 0)
300 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
303 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
306 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
309 /* Automatically add mount points that aren't natively
310 * configured to local-fs.target */
314 if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
315 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
318 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
322 static bool mount_is_bind(MountParameters *p) {
325 if (p->fstype && streq(p->fstype, "bind"))
328 if (mount_test_option(p->options, "bind"))
334 static int mount_add_device_links(Mount *m) {
340 if (m->from_fragment)
341 p = &m->parameters_fragment;
342 else if (m->from_etc_fstab)
343 p = &m->parameters_etc_fstab;
347 if (!p->what || path_equal(m->where, "/"))
350 if (mount_is_bind(p))
353 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
354 nofail = !!mount_test_option(p->options, "nofail");
356 return unit_add_node_link(UNIT(m), p->what,
358 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM);
361 static int mount_add_default_dependencies(Mount *m) {
366 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
367 !path_equal(m->where, "/")) {
369 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
372 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
379 static int mount_verify(Mount *m) {
384 if (m->meta.load_state != UNIT_LOADED)
387 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
390 if (!(e = unit_name_from_path(m->where, ".mount")))
393 b = unit_has_name(UNIT(m), e);
397 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
401 if (m->meta.fragment_path && !m->parameters_fragment.what) {
402 log_error("%s's What setting is missing. Refusing.", m->meta.id);
406 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
407 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
414 static int mount_load(Unit *u) {
419 assert(u->meta.load_state == UNIT_STUB);
421 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
424 /* This is a new unit? Then let's add in some extras */
425 if (u->meta.load_state == UNIT_LOADED) {
426 if (m->meta.fragment_path)
427 m->from_fragment = true;
430 if (!(m->where = unit_name_to_path(u->meta.id)))
433 path_kill_slashes(m->where);
435 if (!m->meta.description)
436 if ((r = unit_set_description(u, m->where)) < 0)
439 if ((r = mount_add_device_links(m)) < 0)
442 if ((r = mount_add_mount_links(m)) < 0)
445 if ((r = mount_add_socket_links(m)) < 0)
448 if ((r = mount_add_swap_links(m)) < 0)
451 if ((r = mount_add_path_links(m)) < 0)
454 if ((r = mount_add_automount_links(m)) < 0)
457 if ((r = mount_add_target_links(m)) < 0)
460 if ((r = unit_add_default_cgroup(u)) < 0)
463 if (m->meta.default_dependencies)
464 if ((r = mount_add_default_dependencies(m)) < 0)
468 return mount_verify(m);
471 static int mount_notify_automount(Mount *m, int status) {
477 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
478 return r == -ENOENT ? 0 : r;
480 return automount_send_ready(AUTOMOUNT(p), status);
483 static void mount_set_state(Mount *m, MountState state) {
484 MountState old_state;
487 old_state = m->state;
490 if (state != MOUNT_MOUNTING &&
491 state != MOUNT_MOUNTING_DONE &&
492 state != MOUNT_REMOUNTING &&
493 state != MOUNT_UNMOUNTING &&
494 state != MOUNT_MOUNTING_SIGTERM &&
495 state != MOUNT_MOUNTING_SIGKILL &&
496 state != MOUNT_UNMOUNTING_SIGTERM &&
497 state != MOUNT_UNMOUNTING_SIGKILL &&
498 state != MOUNT_REMOUNTING_SIGTERM &&
499 state != MOUNT_REMOUNTING_SIGKILL) {
500 unit_unwatch_timer(UNIT(m), &m->timer_watch);
501 mount_unwatch_control_pid(m);
502 m->control_command = NULL;
503 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
506 if (state == MOUNT_MOUNTED ||
507 state == MOUNT_REMOUNTING)
508 mount_notify_automount(m, 0);
509 else if (state == MOUNT_DEAD ||
510 state == MOUNT_UNMOUNTING ||
511 state == MOUNT_MOUNTING_SIGTERM ||
512 state == MOUNT_MOUNTING_SIGKILL ||
513 state == MOUNT_REMOUNTING_SIGTERM ||
514 state == MOUNT_REMOUNTING_SIGKILL ||
515 state == MOUNT_UNMOUNTING_SIGTERM ||
516 state == MOUNT_UNMOUNTING_SIGKILL ||
517 state == MOUNT_FAILED)
518 mount_notify_automount(m, -ENODEV);
520 if (state != old_state)
521 log_debug("%s changed %s -> %s",
523 mount_state_to_string(old_state),
524 mount_state_to_string(state));
526 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
529 static int mount_coldplug(Unit *u) {
531 MountState new_state = MOUNT_DEAD;
535 assert(m->state == MOUNT_DEAD);
537 if (m->deserialized_state != m->state)
538 new_state = m->deserialized_state;
539 else if (m->from_proc_self_mountinfo)
540 new_state = MOUNT_MOUNTED;
542 if (new_state != m->state) {
544 if (new_state == MOUNT_MOUNTING ||
545 new_state == MOUNT_MOUNTING_DONE ||
546 new_state == MOUNT_REMOUNTING ||
547 new_state == MOUNT_UNMOUNTING ||
548 new_state == MOUNT_MOUNTING_SIGTERM ||
549 new_state == MOUNT_MOUNTING_SIGKILL ||
550 new_state == MOUNT_UNMOUNTING_SIGTERM ||
551 new_state == MOUNT_UNMOUNTING_SIGKILL ||
552 new_state == MOUNT_REMOUNTING_SIGTERM ||
553 new_state == MOUNT_REMOUNTING_SIGKILL) {
555 if (m->control_pid <= 0)
558 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
561 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
565 mount_set_state(m, new_state);
571 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
578 if (m->from_proc_self_mountinfo)
579 p = &m->parameters_proc_self_mountinfo;
580 else if (m->from_fragment)
581 p = &m->parameters_fragment;
583 p = &m->parameters_etc_fstab;
586 "%sMount State: %s\n"
589 "%sFile System Type: %s\n"
591 "%sFrom /etc/fstab: %s\n"
592 "%sFrom /proc/self/mountinfo: %s\n"
593 "%sFrom fragment: %s\n"
594 "%sDirectoryMode: %04o\n",
595 prefix, mount_state_to_string(m->state),
597 prefix, strna(p->what),
598 prefix, strna(p->fstype),
599 prefix, strna(p->options),
600 prefix, yes_no(m->from_etc_fstab),
601 prefix, yes_no(m->from_proc_self_mountinfo),
602 prefix, yes_no(m->from_fragment),
603 prefix, m->directory_mode);
605 if (m->control_pid > 0)
607 "%sControl PID: %lu\n",
608 prefix, (unsigned long) m->control_pid);
610 exec_context_dump(&m->exec_context, f, prefix);
613 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
621 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
624 if ((r = exec_spawn(c,
628 m->meta.manager->environment,
632 m->meta.manager->confirm_spawn,
633 m->meta.cgroup_bondings,
637 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
638 /* FIXME: we need to do something here */
646 unit_unwatch_timer(UNIT(m), &m->timer_watch);
651 static void mount_enter_dead(Mount *m, bool success) {
657 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
660 static void mount_enter_mounted(Mount *m, bool success) {
666 mount_set_state(m, MOUNT_MOUNTED);
669 static void mount_enter_signal(Mount *m, MountState state, bool success) {
672 bool wait_for_exit = false;
679 if (m->exec_context.kill_mode != KILL_NONE) {
680 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
681 state == MOUNT_UNMOUNTING_SIGTERM ||
682 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
684 if (m->control_pid > 0) {
685 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
687 m->control_pid, sig) < 0 && errno != ESRCH)
689 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
691 wait_for_exit = true;
694 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
696 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
701 /* Exclude the control pid from being killed via the cgroup */
702 if (m->control_pid > 0)
703 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
706 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
707 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
708 log_warning("Failed to kill control group: %s", strerror(-r));
710 wait_for_exit = true;
717 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
720 mount_set_state(m, state);
721 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
722 mount_enter_mounted(m, true);
724 mount_enter_dead(m, true);
729 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
731 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
732 mount_enter_mounted(m, false);
734 mount_enter_dead(m, false);
740 static void mount_enter_unmounting(Mount *m, bool success) {
748 m->control_command_id = MOUNT_EXEC_UNMOUNT;
749 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
751 if ((r = exec_command_set(
758 mount_unwatch_control_pid(m);
760 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
763 mount_set_state(m, MOUNT_UNMOUNTING);
768 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
769 mount_enter_mounted(m, false);
772 static void mount_enter_mounting(Mount *m) {
777 m->control_command_id = MOUNT_EXEC_MOUNT;
778 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
780 mkdir_p(m->where, m->directory_mode);
782 if (m->from_fragment)
783 r = exec_command_set(
786 m->parameters_fragment.what,
788 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
789 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
791 else if (m->from_etc_fstab)
792 r = exec_command_set(
803 mount_unwatch_control_pid(m);
805 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
808 mount_set_state(m, MOUNT_MOUNTING);
813 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
814 mount_enter_dead(m, false);
817 static void mount_enter_mounting_done(Mount *m) {
820 mount_set_state(m, MOUNT_MOUNTING_DONE);
823 static void mount_enter_remounting(Mount *m, bool success) {
831 m->control_command_id = MOUNT_EXEC_REMOUNT;
832 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
834 if (m->from_fragment) {
838 if (m->parameters_fragment.options) {
839 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
848 r = exec_command_set(
851 m->parameters_fragment.what,
853 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
858 } else if (m->from_etc_fstab)
859 r = exec_command_set(
871 mount_unwatch_control_pid(m);
873 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
876 mount_set_state(m, MOUNT_REMOUNTING);
881 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
882 mount_enter_mounted(m, false);
885 static int mount_start(Unit *u) {
890 /* We cannot fulfill this request right now, try again later
892 if (m->state == MOUNT_UNMOUNTING ||
893 m->state == MOUNT_UNMOUNTING_SIGTERM ||
894 m->state == MOUNT_UNMOUNTING_SIGKILL ||
895 m->state == MOUNT_MOUNTING_SIGTERM ||
896 m->state == MOUNT_MOUNTING_SIGKILL)
900 if (m->state == MOUNT_MOUNTING)
903 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
906 mount_enter_mounting(m);
910 static int mount_stop(Unit *u) {
916 if (m->state == MOUNT_UNMOUNTING ||
917 m->state == MOUNT_UNMOUNTING_SIGKILL ||
918 m->state == MOUNT_UNMOUNTING_SIGTERM ||
919 m->state == MOUNT_MOUNTING_SIGTERM ||
920 m->state == MOUNT_MOUNTING_SIGKILL)
923 assert(m->state == MOUNT_MOUNTING ||
924 m->state == MOUNT_MOUNTING_DONE ||
925 m->state == MOUNT_MOUNTED ||
926 m->state == MOUNT_REMOUNTING ||
927 m->state == MOUNT_REMOUNTING_SIGTERM ||
928 m->state == MOUNT_REMOUNTING_SIGKILL);
930 mount_enter_unmounting(m, true);
934 static int mount_reload(Unit *u) {
939 if (m->state == MOUNT_MOUNTING_DONE)
942 assert(m->state == MOUNT_MOUNTED);
944 mount_enter_remounting(m, true);
948 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
955 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
956 unit_serialize_item(u, f, "failure", yes_no(m->failure));
958 if (m->control_pid > 0)
959 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
961 if (m->control_command_id >= 0)
962 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
967 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
975 if (streq(key, "state")) {
978 if ((state = mount_state_from_string(value)) < 0)
979 log_debug("Failed to parse state value %s", value);
981 m->deserialized_state = state;
982 } else if (streq(key, "failure")) {
985 if ((b = parse_boolean(value)) < 0)
986 log_debug("Failed to parse failure value %s", value);
988 m->failure = b || m->failure;
990 } else if (streq(key, "control-pid")) {
993 if (parse_pid(value, &pid) < 0)
994 log_debug("Failed to parse control-pid value %s", value);
996 m->control_pid = pid;
997 } else if (streq(key, "control-command")) {
1000 if ((id = mount_exec_command_from_string(value)) < 0)
1001 log_debug("Failed to parse exec-command value %s", value);
1003 m->control_command_id = id;
1004 m->control_command = m->exec_command + id;
1008 log_debug("Unknown serialization key '%s'", key);
1013 static UnitActiveState mount_active_state(Unit *u) {
1016 return state_translation_table[MOUNT(u)->state];
1019 static const char *mount_sub_state_to_string(Unit *u) {
1022 return mount_state_to_string(MOUNT(u)->state);
1025 static bool mount_check_gc(Unit *u) {
1026 Mount *m = MOUNT(u);
1030 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1033 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1034 Mount *m = MOUNT(u);
1040 if (pid != m->control_pid)
1045 success = is_clean_exit(code, status);
1046 m->failure = m->failure || !success;
1048 if (m->control_command) {
1049 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1050 m->control_command = NULL;
1051 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1054 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1055 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1057 /* Note that mount(8) returning and the kernel sending us a
1058 * mount table change event might happen out-of-order. If an
1059 * operation succeed we assume the kernel will follow soon too
1060 * and already change into the resulting state. If it fails
1061 * we check if the kernel still knows about the mount. and
1062 * change state accordingly. */
1066 case MOUNT_MOUNTING:
1067 case MOUNT_MOUNTING_DONE:
1068 case MOUNT_MOUNTING_SIGKILL:
1069 case MOUNT_MOUNTING_SIGTERM:
1070 case MOUNT_REMOUNTING:
1071 case MOUNT_REMOUNTING_SIGKILL:
1072 case MOUNT_REMOUNTING_SIGTERM:
1075 mount_enter_mounted(m, true);
1076 else if (m->from_proc_self_mountinfo)
1077 mount_enter_mounted(m, false);
1079 mount_enter_dead(m, false);
1082 case MOUNT_UNMOUNTING:
1083 case MOUNT_UNMOUNTING_SIGKILL:
1084 case MOUNT_UNMOUNTING_SIGTERM:
1087 mount_enter_dead(m, true);
1088 else if (m->from_proc_self_mountinfo)
1089 mount_enter_mounted(m, false);
1091 mount_enter_dead(m, false);
1095 assert_not_reached("Uh, control process died at wrong time.");
1098 /* Notify clients about changed exit status */
1099 unit_add_to_dbus_queue(u);
1102 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1103 Mount *m = MOUNT(u);
1106 assert(elapsed == 1);
1107 assert(w == &m->timer_watch);
1111 case MOUNT_MOUNTING:
1112 case MOUNT_MOUNTING_DONE:
1113 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1114 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1117 case MOUNT_REMOUNTING:
1118 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1119 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1122 case MOUNT_UNMOUNTING:
1123 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1124 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1127 case MOUNT_MOUNTING_SIGTERM:
1128 log_warning("%s mounting timed out. Killing.", u->meta.id);
1129 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1132 case MOUNT_REMOUNTING_SIGTERM:
1133 log_warning("%s remounting timed out. Killing.", u->meta.id);
1134 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1137 case MOUNT_UNMOUNTING_SIGTERM:
1138 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1139 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1142 case MOUNT_MOUNTING_SIGKILL:
1143 case MOUNT_REMOUNTING_SIGKILL:
1144 case MOUNT_UNMOUNTING_SIGKILL:
1145 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1147 if (m->from_proc_self_mountinfo)
1148 mount_enter_mounted(m, false);
1150 mount_enter_dead(m, false);
1154 assert_not_reached("Timeout at wrong time.");
1158 static int mount_add_one(
1162 const char *options,
1164 bool from_proc_self_mountinfo,
1169 char *e, *w = NULL, *o = NULL, *f = NULL;
1178 assert(!set_flags || from_proc_self_mountinfo);
1180 /* Ignore API mount points. They should never be referenced in
1181 * dependencies ever. */
1182 if (mount_point_is_api(where))
1185 if (streq(fstype, "autofs"))
1188 /* probably some kind of swap, ignore */
1189 if (!is_path(where))
1192 if (!(e = unit_name_from_path(where, ".mount")))
1195 if (!(u = manager_get_unit(m, e))) {
1198 if (!(u = unit_new(m))) {
1203 r = unit_add_name(u, e);
1209 if (!(MOUNT(u)->where = strdup(where))) {
1214 unit_add_to_load_queue(u);
1220 if (!(w = strdup(what)) ||
1221 !(o = strdup(options)) ||
1222 !(f = strdup(fstype))) {
1227 if (from_proc_self_mountinfo) {
1228 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1231 MOUNT(u)->is_mounted = true;
1232 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1233 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1236 MOUNT(u)->from_proc_self_mountinfo = true;
1238 p = &MOUNT(u)->parameters_etc_fstab;
1239 MOUNT(u)->from_etc_fstab = true;
1251 unit_add_to_dbus_queue(u);
1266 static char *fstab_node_to_udev_node(char *p) {
1270 /* FIXME: to follow udev's logic 100% we need to leave valid
1271 * UTF8 chars unescaped */
1273 if (startswith(p, "LABEL=")) {
1275 if (!(u = unquote(p+6, "\"\'")))
1278 t = xescape(u, "/ ");
1284 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1293 if (startswith(p, "UUID=")) {
1295 if (!(u = unquote(p+5, "\"\'")))
1298 t = xescape(u, "/ ");
1304 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1316 static int mount_find_pri(char *options) {
1320 if (!(pri = mount_test_option(options, "pri=")))
1326 r = strtoul(pri, &end, 10);
1331 if (end == pri || (*end != ',' && *end != 0))
1337 static int mount_load_etc_fstab(Manager *m) {
1345 if (!(f = setmntent("/etc/fstab", "r")))
1348 while ((me = getmntent(f))) {
1352 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1357 if (!(where = strdup(me->mnt_dir))) {
1364 path_kill_slashes(what);
1366 if (where[0] == '/')
1367 path_kill_slashes(where);
1369 if (streq(me->mnt_type, "swap")) {
1372 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1379 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1380 !!mount_test_option(me->mnt_opts, "nofail"),
1381 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1384 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1399 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1402 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1406 rewind(m->proc_self_mountinfo);
1411 device = path = options = options2 = fstype = d = p = o = NULL;
1413 if ((k = fscanf(m->proc_self_mountinfo,
1414 "%*s " /* (1) mount id */
1415 "%*s " /* (2) parent id */
1416 "%*s " /* (3) major:minor */
1417 "%*s " /* (4) root */
1418 "%ms " /* (5) mount point */
1419 "%ms" /* (6) mount options */
1420 "%*[^-]" /* (7) optional fields */
1421 "- " /* (8) separator */
1422 "%ms " /* (9) file system type */
1423 "%ms" /* (10) mount source */
1424 "%ms" /* (11) mount options 2 */
1425 "%*[^\n]", /* some rubbish at the end */
1435 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1439 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1444 if (!(d = cunescape(device)) ||
1445 !(p = cunescape(path))) {
1450 if ((k = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1477 static void mount_shutdown(Manager *m) {
1480 if (m->proc_self_mountinfo) {
1481 fclose(m->proc_self_mountinfo);
1482 m->proc_self_mountinfo = NULL;
1486 static int mount_enumerate(Manager *m) {
1488 struct epoll_event ev;
1491 if (!m->proc_self_mountinfo) {
1492 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1495 m->mount_watch.type = WATCH_MOUNT;
1496 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1499 ev.events = EPOLLERR;
1500 ev.data.ptr = &m->mount_watch;
1502 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1506 if ((r = mount_load_etc_fstab(m)) < 0)
1509 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1519 void mount_fd_event(Manager *m, int events) {
1524 assert(events == EPOLLERR);
1526 /* The manager calls this for every fd event happening on the
1527 * /proc/self/mountinfo file, which informs us about mounting
1530 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1531 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1533 /* Reset flags, just in case, for later calls */
1534 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1535 Mount *mount = (Mount*) meta;
1537 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1543 manager_dispatch_load_queue(m);
1545 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1546 Mount *mount = (Mount*) meta;
1548 if (!mount->is_mounted) {
1549 /* This has just been unmounted. */
1551 mount->from_proc_self_mountinfo = false;
1553 switch (mount->state) {
1556 mount_enter_dead(mount, true);
1560 mount_set_state(mount, mount->state);
1565 } else if (mount->just_mounted || mount->just_changed) {
1567 /* New or changed mount entry */
1569 switch (mount->state) {
1573 mount_enter_mounted(mount, true);
1576 case MOUNT_MOUNTING:
1577 mount_enter_mounting_done(mount);
1581 /* Nothing really changed, but let's
1582 * issue an notification call
1583 * nonetheless, in case somebody is
1584 * waiting for this. (e.g. file system
1585 * ro/rw remounts.) */
1586 mount_set_state(mount, mount->state);
1591 /* Reset the flags for later calls */
1592 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1596 static void mount_reset_failed(Unit *u) {
1597 Mount *m = MOUNT(u);
1601 if (m->state == MOUNT_FAILED)
1602 mount_set_state(m, MOUNT_DEAD);
1607 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1608 [MOUNT_DEAD] = "dead",
1609 [MOUNT_MOUNTING] = "mounting",
1610 [MOUNT_MOUNTING_DONE] = "mounting-done",
1611 [MOUNT_MOUNTED] = "mounted",
1612 [MOUNT_REMOUNTING] = "remounting",
1613 [MOUNT_UNMOUNTING] = "unmounting",
1614 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1615 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1616 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1617 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1618 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1619 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1620 [MOUNT_FAILED] = "failed"
1623 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1625 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1626 [MOUNT_EXEC_MOUNT] = "ExecMount",
1627 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1628 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1631 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1633 const UnitVTable mount_vtable = {
1637 .no_instances = true,
1639 .show_status = true,
1645 .coldplug = mount_coldplug,
1649 .start = mount_start,
1651 .reload = mount_reload,
1653 .serialize = mount_serialize,
1654 .deserialize_item = mount_deserialize_item,
1656 .active_state = mount_active_state,
1657 .sub_state_to_string = mount_sub_state_to_string,
1659 .check_gc = mount_check_gc,
1661 .sigchld_event = mount_sigchld_event,
1662 .timer_event = mount_timer_event,
1664 .reset_failed = mount_reset_failed,
1666 .bus_interface = "org.freedesktop.systemd1.Mount",
1667 .bus_message_handler = bus_mount_message_handler,
1668 .bus_invalidating_properties = bus_mount_invalidating_properties,
1670 .enumerate = mount_enumerate,
1671 .shutdown = mount_shutdown