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;
350 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
353 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
354 nofail = !!mount_test_option(p->options, "nofail");
356 if ((r = unit_add_node_link(UNIT(m), p->what,
358 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
363 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
364 !path_equal(m->where, "/")) {
367 /* Let's add in the fsck service */
369 /* aka SPECIAL_FSCK_SERVICE */
370 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
373 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
374 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
381 SERVICE(fsck)->fsck_passno = p->passno;
383 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
390 static int mount_add_default_dependencies(Mount *m) {
395 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
396 !path_equal(m->where, "/")) {
398 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, SPECIAL_QUOTACHECK_TARGET, NULL, true)) < 0)
401 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
408 static int mount_verify(Mount *m) {
413 if (m->meta.load_state != UNIT_LOADED)
416 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
419 if (!(e = unit_name_from_path(m->where, ".mount")))
422 b = unit_has_name(UNIT(m), e);
426 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
430 if (m->meta.fragment_path && !m->parameters_fragment.what) {
431 log_error("%s's What setting is missing. Refusing.", m->meta.id);
435 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
436 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
443 static int mount_load(Unit *u) {
448 assert(u->meta.load_state == UNIT_STUB);
450 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
453 /* This is a new unit? Then let's add in some extras */
454 if (u->meta.load_state == UNIT_LOADED) {
455 if (m->meta.fragment_path)
456 m->from_fragment = true;
459 if (!(m->where = unit_name_to_path(u->meta.id)))
462 path_kill_slashes(m->where);
464 if (!m->meta.description)
465 if ((r = unit_set_description(u, m->where)) < 0)
468 if ((r = mount_add_device_links(m)) < 0)
471 if ((r = mount_add_mount_links(m)) < 0)
474 if ((r = mount_add_socket_links(m)) < 0)
477 if ((r = mount_add_swap_links(m)) < 0)
480 if ((r = mount_add_path_links(m)) < 0)
483 if ((r = mount_add_automount_links(m)) < 0)
486 if ((r = mount_add_target_links(m)) < 0)
489 if ((r = unit_add_default_cgroup(u)) < 0)
492 if (m->meta.default_dependencies)
493 if ((r = mount_add_default_dependencies(m)) < 0)
497 return mount_verify(m);
500 static int mount_notify_automount(Mount *m, int status) {
506 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
507 return r == -ENOENT ? 0 : r;
509 return automount_send_ready(AUTOMOUNT(p), status);
512 static void mount_set_state(Mount *m, MountState state) {
513 MountState old_state;
516 old_state = m->state;
519 if (state != MOUNT_MOUNTING &&
520 state != MOUNT_MOUNTING_DONE &&
521 state != MOUNT_REMOUNTING &&
522 state != MOUNT_UNMOUNTING &&
523 state != MOUNT_MOUNTING_SIGTERM &&
524 state != MOUNT_MOUNTING_SIGKILL &&
525 state != MOUNT_UNMOUNTING_SIGTERM &&
526 state != MOUNT_UNMOUNTING_SIGKILL &&
527 state != MOUNT_REMOUNTING_SIGTERM &&
528 state != MOUNT_REMOUNTING_SIGKILL) {
529 unit_unwatch_timer(UNIT(m), &m->timer_watch);
530 mount_unwatch_control_pid(m);
531 m->control_command = NULL;
532 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
535 if (state == MOUNT_MOUNTED ||
536 state == MOUNT_REMOUNTING)
537 mount_notify_automount(m, 0);
538 else if (state == MOUNT_DEAD ||
539 state == MOUNT_UNMOUNTING ||
540 state == MOUNT_MOUNTING_SIGTERM ||
541 state == MOUNT_MOUNTING_SIGKILL ||
542 state == MOUNT_REMOUNTING_SIGTERM ||
543 state == MOUNT_REMOUNTING_SIGKILL ||
544 state == MOUNT_UNMOUNTING_SIGTERM ||
545 state == MOUNT_UNMOUNTING_SIGKILL ||
546 state == MOUNT_FAILED)
547 mount_notify_automount(m, -ENODEV);
549 if (state != old_state)
550 log_debug("%s changed %s -> %s",
552 mount_state_to_string(old_state),
553 mount_state_to_string(state));
555 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
558 static int mount_coldplug(Unit *u) {
560 MountState new_state = MOUNT_DEAD;
564 assert(m->state == MOUNT_DEAD);
566 if (m->deserialized_state != m->state)
567 new_state = m->deserialized_state;
568 else if (m->from_proc_self_mountinfo)
569 new_state = MOUNT_MOUNTED;
571 if (new_state != m->state) {
573 if (new_state == MOUNT_MOUNTING ||
574 new_state == MOUNT_MOUNTING_DONE ||
575 new_state == MOUNT_REMOUNTING ||
576 new_state == MOUNT_UNMOUNTING ||
577 new_state == MOUNT_MOUNTING_SIGTERM ||
578 new_state == MOUNT_MOUNTING_SIGKILL ||
579 new_state == MOUNT_UNMOUNTING_SIGTERM ||
580 new_state == MOUNT_UNMOUNTING_SIGKILL ||
581 new_state == MOUNT_REMOUNTING_SIGTERM ||
582 new_state == MOUNT_REMOUNTING_SIGKILL) {
584 if (m->control_pid <= 0)
587 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
590 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
594 mount_set_state(m, new_state);
600 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
607 if (m->from_proc_self_mountinfo)
608 p = &m->parameters_proc_self_mountinfo;
609 else if (m->from_fragment)
610 p = &m->parameters_fragment;
612 p = &m->parameters_etc_fstab;
615 "%sMount State: %s\n"
618 "%sFile System Type: %s\n"
620 "%sFrom /etc/fstab: %s\n"
621 "%sFrom /proc/self/mountinfo: %s\n"
622 "%sFrom fragment: %s\n"
623 "%sDirectoryMode: %04o\n",
624 prefix, mount_state_to_string(m->state),
626 prefix, strna(p->what),
627 prefix, strna(p->fstype),
628 prefix, strna(p->options),
629 prefix, yes_no(m->from_etc_fstab),
630 prefix, yes_no(m->from_proc_self_mountinfo),
631 prefix, yes_no(m->from_fragment),
632 prefix, m->directory_mode);
634 if (m->control_pid > 0)
636 "%sControl PID: %lu\n",
637 prefix, (unsigned long) m->control_pid);
639 exec_context_dump(&m->exec_context, f, prefix);
642 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
650 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
653 if ((r = exec_spawn(c,
657 m->meta.manager->environment,
661 m->meta.manager->confirm_spawn,
662 m->meta.cgroup_bondings,
666 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
667 /* FIXME: we need to do something here */
675 unit_unwatch_timer(UNIT(m), &m->timer_watch);
680 static void mount_enter_dead(Mount *m, bool success) {
686 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
689 static void mount_enter_mounted(Mount *m, bool success) {
695 mount_set_state(m, MOUNT_MOUNTED);
698 static void mount_enter_signal(Mount *m, MountState state, bool success) {
701 bool wait_for_exit = false;
708 if (m->exec_context.kill_mode != KILL_NONE) {
709 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
710 state == MOUNT_UNMOUNTING_SIGTERM ||
711 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
713 if (m->control_pid > 0) {
714 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
716 m->control_pid, sig) < 0 && errno != ESRCH)
718 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
720 wait_for_exit = true;
723 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
725 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
730 /* Exclude the control pid from being killed via the cgroup */
731 if (m->control_pid > 0)
732 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
735 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
736 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
737 log_warning("Failed to kill control group: %s", strerror(-r));
739 wait_for_exit = true;
746 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
749 mount_set_state(m, state);
750 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
751 mount_enter_mounted(m, true);
753 mount_enter_dead(m, true);
758 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
760 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
761 mount_enter_mounted(m, false);
763 mount_enter_dead(m, false);
769 static void mount_enter_unmounting(Mount *m, bool success) {
777 m->control_command_id = MOUNT_EXEC_UNMOUNT;
778 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
780 if ((r = exec_command_set(
787 mount_unwatch_control_pid(m);
789 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
792 mount_set_state(m, MOUNT_UNMOUNTING);
797 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
798 mount_enter_mounted(m, false);
801 static void mount_enter_mounting(Mount *m) {
806 m->control_command_id = MOUNT_EXEC_MOUNT;
807 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
809 mkdir_p(m->where, m->directory_mode);
811 if (m->from_fragment)
812 r = exec_command_set(
815 m->parameters_fragment.what,
817 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
818 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
820 else if (m->from_etc_fstab)
821 r = exec_command_set(
832 mount_unwatch_control_pid(m);
834 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
837 mount_set_state(m, MOUNT_MOUNTING);
842 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
843 mount_enter_dead(m, false);
846 static void mount_enter_mounting_done(Mount *m) {
849 mount_set_state(m, MOUNT_MOUNTING_DONE);
852 static void mount_enter_remounting(Mount *m, bool success) {
860 m->control_command_id = MOUNT_EXEC_REMOUNT;
861 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
863 if (m->from_fragment) {
867 if (m->parameters_fragment.options) {
868 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
877 r = exec_command_set(
880 m->parameters_fragment.what,
882 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
887 } else if (m->from_etc_fstab)
888 r = exec_command_set(
900 mount_unwatch_control_pid(m);
902 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
905 mount_set_state(m, MOUNT_REMOUNTING);
910 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
911 mount_enter_mounted(m, false);
914 static int mount_start(Unit *u) {
919 /* We cannot fulfill this request right now, try again later
921 if (m->state == MOUNT_UNMOUNTING ||
922 m->state == MOUNT_UNMOUNTING_SIGTERM ||
923 m->state == MOUNT_UNMOUNTING_SIGKILL ||
924 m->state == MOUNT_MOUNTING_SIGTERM ||
925 m->state == MOUNT_MOUNTING_SIGKILL)
929 if (m->state == MOUNT_MOUNTING)
932 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
935 mount_enter_mounting(m);
939 static int mount_stop(Unit *u) {
945 if (m->state == MOUNT_UNMOUNTING ||
946 m->state == MOUNT_UNMOUNTING_SIGKILL ||
947 m->state == MOUNT_UNMOUNTING_SIGTERM ||
948 m->state == MOUNT_MOUNTING_SIGTERM ||
949 m->state == MOUNT_MOUNTING_SIGKILL)
952 assert(m->state == MOUNT_MOUNTING ||
953 m->state == MOUNT_MOUNTING_DONE ||
954 m->state == MOUNT_MOUNTED ||
955 m->state == MOUNT_REMOUNTING ||
956 m->state == MOUNT_REMOUNTING_SIGTERM ||
957 m->state == MOUNT_REMOUNTING_SIGKILL);
959 mount_enter_unmounting(m, true);
963 static int mount_reload(Unit *u) {
968 if (m->state == MOUNT_MOUNTING_DONE)
971 assert(m->state == MOUNT_MOUNTED);
973 mount_enter_remounting(m, true);
977 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
984 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
985 unit_serialize_item(u, f, "failure", yes_no(m->failure));
987 if (m->control_pid > 0)
988 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
990 if (m->control_command_id >= 0)
991 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
996 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1004 if (streq(key, "state")) {
1007 if ((state = mount_state_from_string(value)) < 0)
1008 log_debug("Failed to parse state value %s", value);
1010 m->deserialized_state = state;
1011 } else if (streq(key, "failure")) {
1014 if ((b = parse_boolean(value)) < 0)
1015 log_debug("Failed to parse failure value %s", value);
1017 m->failure = b || m->failure;
1019 } else if (streq(key, "control-pid")) {
1022 if (parse_pid(value, &pid) < 0)
1023 log_debug("Failed to parse control-pid value %s", value);
1025 m->control_pid = pid;
1026 } else if (streq(key, "control-command")) {
1027 MountExecCommand id;
1029 if ((id = mount_exec_command_from_string(value)) < 0)
1030 log_debug("Failed to parse exec-command value %s", value);
1032 m->control_command_id = id;
1033 m->control_command = m->exec_command + id;
1037 log_debug("Unknown serialization key '%s'", key);
1042 static UnitActiveState mount_active_state(Unit *u) {
1045 return state_translation_table[MOUNT(u)->state];
1048 static const char *mount_sub_state_to_string(Unit *u) {
1051 return mount_state_to_string(MOUNT(u)->state);
1054 static bool mount_check_gc(Unit *u) {
1055 Mount *m = MOUNT(u);
1059 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1062 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1063 Mount *m = MOUNT(u);
1069 if (pid != m->control_pid)
1074 success = is_clean_exit(code, status);
1075 m->failure = m->failure || !success;
1077 if (m->control_command) {
1078 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1079 m->control_command = NULL;
1080 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1083 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1084 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1086 /* Note that mount(8) returning and the kernel sending us a
1087 * mount table change event might happen out-of-order. If an
1088 * operation succeed we assume the kernel will follow soon too
1089 * and already change into the resulting state. If it fails
1090 * we check if the kernel still knows about the mount. and
1091 * change state accordingly. */
1095 case MOUNT_MOUNTING:
1096 case MOUNT_MOUNTING_DONE:
1097 case MOUNT_MOUNTING_SIGKILL:
1098 case MOUNT_MOUNTING_SIGTERM:
1099 case MOUNT_REMOUNTING:
1100 case MOUNT_REMOUNTING_SIGKILL:
1101 case MOUNT_REMOUNTING_SIGTERM:
1104 mount_enter_mounted(m, true);
1105 else if (m->from_proc_self_mountinfo)
1106 mount_enter_mounted(m, false);
1108 mount_enter_dead(m, false);
1111 case MOUNT_UNMOUNTING:
1112 case MOUNT_UNMOUNTING_SIGKILL:
1113 case MOUNT_UNMOUNTING_SIGTERM:
1116 mount_enter_dead(m, true);
1117 else if (m->from_proc_self_mountinfo)
1118 mount_enter_mounted(m, false);
1120 mount_enter_dead(m, false);
1124 assert_not_reached("Uh, control process died at wrong time.");
1127 /* Notify clients about changed exit status */
1128 unit_add_to_dbus_queue(u);
1131 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1132 Mount *m = MOUNT(u);
1135 assert(elapsed == 1);
1136 assert(w == &m->timer_watch);
1140 case MOUNT_MOUNTING:
1141 case MOUNT_MOUNTING_DONE:
1142 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1143 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1146 case MOUNT_REMOUNTING:
1147 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1148 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1151 case MOUNT_UNMOUNTING:
1152 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1153 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1156 case MOUNT_MOUNTING_SIGTERM:
1157 log_warning("%s mounting timed out. Killing.", u->meta.id);
1158 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1161 case MOUNT_REMOUNTING_SIGTERM:
1162 log_warning("%s remounting timed out. Killing.", u->meta.id);
1163 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1166 case MOUNT_UNMOUNTING_SIGTERM:
1167 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1168 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1171 case MOUNT_MOUNTING_SIGKILL:
1172 case MOUNT_REMOUNTING_SIGKILL:
1173 case MOUNT_UNMOUNTING_SIGKILL:
1174 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1176 if (m->from_proc_self_mountinfo)
1177 mount_enter_mounted(m, false);
1179 mount_enter_dead(m, false);
1183 assert_not_reached("Timeout at wrong time.");
1187 static int mount_add_one(
1191 const char *options,
1194 bool from_proc_self_mountinfo,
1199 char *e, *w = NULL, *o = NULL, *f = NULL;
1208 assert(!set_flags || from_proc_self_mountinfo);
1210 /* Ignore API mount points. They should never be referenced in
1211 * dependencies ever. */
1212 if (mount_point_is_api(where))
1215 if (streq(fstype, "autofs"))
1218 /* probably some kind of swap, ignore */
1219 if (!is_path(where))
1222 if (!(e = unit_name_from_path(where, ".mount")))
1225 if (!(u = manager_get_unit(m, e))) {
1228 if (!(u = unit_new(m))) {
1233 r = unit_add_name(u, e);
1239 if (!(MOUNT(u)->where = strdup(where))) {
1244 unit_add_to_load_queue(u);
1250 if (!(w = strdup(what)) ||
1251 !(o = strdup(options)) ||
1252 !(f = strdup(fstype))) {
1257 if (from_proc_self_mountinfo) {
1258 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1261 MOUNT(u)->is_mounted = true;
1262 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1263 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1266 MOUNT(u)->from_proc_self_mountinfo = true;
1268 p = &MOUNT(u)->parameters_etc_fstab;
1269 MOUNT(u)->from_etc_fstab = true;
1283 unit_add_to_dbus_queue(u);
1298 static char *fstab_node_to_udev_node(char *p) {
1302 /* FIXME: to follow udev's logic 100% we need to leave valid
1303 * UTF8 chars unescaped */
1305 if (startswith(p, "LABEL=")) {
1307 if (!(u = unquote(p+6, "\"\'")))
1310 t = xescape(u, "/ ");
1316 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1325 if (startswith(p, "UUID=")) {
1327 if (!(u = unquote(p+5, "\"\'")))
1330 t = xescape(u, "/ ");
1336 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1348 static int mount_find_pri(char *options) {
1352 if (!(pri = mount_test_option(options, "pri=")))
1358 r = strtoul(pri, &end, 10);
1363 if (end == pri || (*end != ',' && *end != 0))
1369 static int mount_load_etc_fstab(Manager *m) {
1377 if (!(f = setmntent("/etc/fstab", "r")))
1380 while ((me = getmntent(f))) {
1384 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1389 if (!(where = strdup(me->mnt_dir))) {
1396 path_kill_slashes(what);
1398 if (where[0] == '/')
1399 path_kill_slashes(where);
1401 if (streq(me->mnt_type, "swap")) {
1404 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1411 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1412 !!mount_test_option(me->mnt_opts, "nofail"),
1413 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1416 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1431 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1434 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1438 rewind(m->proc_self_mountinfo);
1443 device = path = options = options2 = fstype = d = p = o = NULL;
1445 if ((k = fscanf(m->proc_self_mountinfo,
1446 "%*s " /* (1) mount id */
1447 "%*s " /* (2) parent id */
1448 "%*s " /* (3) major:minor */
1449 "%*s " /* (4) root */
1450 "%ms " /* (5) mount point */
1451 "%ms" /* (6) mount options */
1452 "%*[^-]" /* (7) optional fields */
1453 "- " /* (8) separator */
1454 "%ms " /* (9) file system type */
1455 "%ms" /* (10) mount source */
1456 "%ms" /* (11) mount options 2 */
1457 "%*[^\n]", /* some rubbish at the end */
1467 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1471 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1476 if (!(d = cunescape(device)) ||
1477 !(p = cunescape(path))) {
1482 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1509 static void mount_shutdown(Manager *m) {
1512 if (m->proc_self_mountinfo) {
1513 fclose(m->proc_self_mountinfo);
1514 m->proc_self_mountinfo = NULL;
1518 static int mount_enumerate(Manager *m) {
1520 struct epoll_event ev;
1523 if (!m->proc_self_mountinfo) {
1524 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1527 m->mount_watch.type = WATCH_MOUNT;
1528 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1531 ev.events = EPOLLPRI;
1532 ev.data.ptr = &m->mount_watch;
1534 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1538 if ((r = mount_load_etc_fstab(m)) < 0)
1541 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1551 void mount_fd_event(Manager *m, int events) {
1556 assert(events & EPOLLPRI);
1558 /* The manager calls this for every fd event happening on the
1559 * /proc/self/mountinfo file, which informs us about mounting
1562 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1563 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1565 /* Reset flags, just in case, for later calls */
1566 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1567 Mount *mount = (Mount*) meta;
1569 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1575 manager_dispatch_load_queue(m);
1577 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1578 Mount *mount = (Mount*) meta;
1580 if (!mount->is_mounted) {
1581 /* This has just been unmounted. */
1583 mount->from_proc_self_mountinfo = false;
1585 switch (mount->state) {
1588 mount_enter_dead(mount, true);
1592 mount_set_state(mount, mount->state);
1597 } else if (mount->just_mounted || mount->just_changed) {
1599 /* New or changed mount entry */
1601 switch (mount->state) {
1605 mount_enter_mounted(mount, true);
1608 case MOUNT_MOUNTING:
1609 mount_enter_mounting_done(mount);
1613 /* Nothing really changed, but let's
1614 * issue an notification call
1615 * nonetheless, in case somebody is
1616 * waiting for this. (e.g. file system
1617 * ro/rw remounts.) */
1618 mount_set_state(mount, mount->state);
1623 /* Reset the flags for later calls */
1624 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1628 static void mount_reset_failed(Unit *u) {
1629 Mount *m = MOUNT(u);
1633 if (m->state == MOUNT_FAILED)
1634 mount_set_state(m, MOUNT_DEAD);
1639 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1640 [MOUNT_DEAD] = "dead",
1641 [MOUNT_MOUNTING] = "mounting",
1642 [MOUNT_MOUNTING_DONE] = "mounting-done",
1643 [MOUNT_MOUNTED] = "mounted",
1644 [MOUNT_REMOUNTING] = "remounting",
1645 [MOUNT_UNMOUNTING] = "unmounting",
1646 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1647 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1648 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1649 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1650 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1651 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1652 [MOUNT_FAILED] = "failed"
1655 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1657 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1658 [MOUNT_EXEC_MOUNT] = "ExecMount",
1659 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1660 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1663 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1665 const UnitVTable mount_vtable = {
1669 .no_instances = true,
1671 .show_status = true,
1677 .coldplug = mount_coldplug,
1681 .start = mount_start,
1683 .reload = mount_reload,
1685 .serialize = mount_serialize,
1686 .deserialize_item = mount_deserialize_item,
1688 .active_state = mount_active_state,
1689 .sub_state_to_string = mount_sub_state_to_string,
1691 .check_gc = mount_check_gc,
1693 .sigchld_event = mount_sigchld_event,
1694 .timer_event = mount_timer_event,
1696 .reset_failed = mount_reset_failed,
1698 .bus_interface = "org.freedesktop.systemd1.Mount",
1699 .bus_message_handler = bus_mount_message_handler,
1700 .bus_invalidating_properties = bus_mount_invalidating_properties,
1702 .enumerate = mount_enumerate,
1703 .shutdown = mount_shutdown