1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
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"
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_ACTIVE_RELOADING,
45 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
46 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
47 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
48 [MOUNT_REMOUNTING_SIGTERM] = UNIT_ACTIVE_RELOADING,
49 [MOUNT_REMOUNTING_SIGKILL] = UNIT_ACTIVE_RELOADING,
50 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
51 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
52 [MOUNT_MAINTAINANCE] = UNIT_INACTIVE,
55 static void mount_init(Unit *u) {
59 assert(u->meta.load_state == UNIT_STUB);
61 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
62 exec_context_init(&m->exec_context);
64 /* We need to make sure that /bin/mount is always called in
65 * the same process group as us, so that the autofs kernel
66 * side doesn't send us another mount request while we are
67 * already trying to comply its last one. */
68 m->exec_context.no_setsid = true;
70 m->timer_watch.type = WATCH_INVALID;
72 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
75 static void mount_unwatch_control_pid(Mount *m) {
78 if (m->control_pid <= 0)
81 unit_unwatch_pid(UNIT(m), m->control_pid);
85 static void mount_parameters_done(MountParameters *p) {
92 p->what = p->options = p->fstype = NULL;
95 static void mount_done(Unit *u) {
103 mount_parameters_done(&m->parameters_etc_fstab);
104 mount_parameters_done(&m->parameters_proc_self_mountinfo);
105 mount_parameters_done(&m->parameters_fragment);
107 exec_context_done(&m->exec_context);
108 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
109 m->control_command = NULL;
111 mount_unwatch_control_pid(m);
113 unit_unwatch_timer(u, &m->timer_watch);
116 static int mount_add_node_links(Mount *m) {
124 /* Adds in links to the device that this node is based on */
126 if (m->parameters_fragment.what)
127 what = m->parameters_fragment.what;
128 else if (m->parameters_etc_fstab.what)
129 what = m->parameters_etc_fstab.what;
131 /* We observe kernel mounts only while they are live,
132 * hence don't create any links for them */
135 if (!path_startswith(what, "/dev/"))
138 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
141 r = manager_load_unit(UNIT(m)->meta.manager, e, NULL, &device);
147 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, device, true)) < 0)
150 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, device, true)) < 0)
153 if (UNIT(m)->meta.manager->running_as == MANAGER_INIT ||
154 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)
155 if ((r = unit_add_dependency(device, UNIT_WANTS, UNIT(m), false)) < 0)
161 static int mount_add_path_links(Mount *m) {
167 /* Adds in link to other mount points, that might lie below or
168 * above us in the hierarchy */
170 LIST_FOREACH(units_per_type, other, UNIT(m)->meta.manager->units_per_type[UNIT_MOUNT]) {
178 if (m->meta.load_state != UNIT_LOADED)
181 if (path_startswith(m->where, n->where)) {
183 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(other), true)) < 0)
186 if (n->from_etc_fstab || n->from_fragment)
187 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(other), true)) < 0)
190 } else if (path_startswith(n->where, m->where)) {
192 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(other), true)) < 0)
195 if (m->from_etc_fstab || m->from_fragment)
196 if ((r = unit_add_dependency(UNIT(other), UNIT_REQUIRES, UNIT(m), true)) < 0)
204 static bool mount_test_option(const char *haystack, const char *needle) {
209 /* Like glibc's hasmntopt(), but works on a string, not a
216 me.mnt_opts = (char*) haystack;
218 return !!hasmntopt(&me, needle);
221 static int mount_add_target_links(Mount *m) {
226 bool noauto, handle, automount;
230 if (m->from_fragment)
231 p = &m->parameters_fragment;
232 else if (m->from_etc_fstab)
233 p = &m->parameters_etc_fstab;
237 noauto = mount_test_option(p->options, MNTOPT_NOAUTO);
238 handle = mount_test_option(p->options, "comment=systemd.mount");
239 automount = mount_test_option(p->options, "comment=systemd.automount");
241 if (noauto && !handle && !automount)
244 if (mount_test_option(p->options, "_netdev") ||
245 fstype_is_network(p->fstype))
246 target = SPECIAL_REMOTE_FS_TARGET;
248 target = SPECIAL_LOCAL_FS_TARGET;
250 if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0)
256 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
259 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(am), true)) < 0)
262 return unit_add_dependency(UNIT(am), UNIT_BEFORE, tu, true);
267 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
270 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
274 static int mount_verify(Mount *m) {
279 if (UNIT(m)->meta.load_state != UNIT_LOADED)
282 if (!(e = unit_name_from_path(m->where, ".mount")))
285 b = unit_has_name(UNIT(m), e);
289 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
296 static int mount_load(Unit *u) {
301 assert(u->meta.load_state == UNIT_STUB);
303 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
306 /* This is a new unit? Then let's add in some extras */
307 if (u->meta.load_state == UNIT_LOADED) {
310 if (!(m->where = unit_name_to_path(u->meta.id)))
313 path_kill_slashes(m->where);
315 /* Minor validity checking */
316 if ((m->parameters_fragment.options || m->parameters_fragment.fstype) && !m->parameters_fragment.what)
319 if (m->parameters_fragment.what)
320 m->from_fragment = true;
322 if ((r = mount_add_node_links(MOUNT(u))) < 0)
325 if ((r = mount_add_path_links(MOUNT(u))) < 0)
328 if ((r = mount_add_target_links(MOUNT(u))) < 0)
331 if ((r = unit_add_default_cgroup(u)) < 0)
335 return mount_verify(m);
338 static int mount_notify_automount(Mount *m, int status) {
344 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
345 return r == -ENOENT ? 0 : r;
347 return automount_send_ready(AUTOMOUNT(p), status);
350 static void mount_set_state(Mount *m, MountState state) {
351 MountState old_state;
354 old_state = m->state;
357 if (state != MOUNT_MOUNTING &&
358 state != MOUNT_MOUNTING_DONE &&
359 state != MOUNT_REMOUNTING &&
360 state != MOUNT_UNMOUNTING &&
361 state != MOUNT_MOUNTING_SIGTERM &&
362 state != MOUNT_MOUNTING_SIGKILL &&
363 state != MOUNT_UNMOUNTING_SIGTERM &&
364 state != MOUNT_UNMOUNTING_SIGKILL &&
365 state != MOUNT_REMOUNTING_SIGTERM &&
366 state != MOUNT_REMOUNTING_SIGKILL) {
367 unit_unwatch_timer(UNIT(m), &m->timer_watch);
368 mount_unwatch_control_pid(m);
369 m->control_command = NULL;
370 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
373 if (state == MOUNT_MOUNTED ||
374 state == MOUNT_REMOUNTING)
375 mount_notify_automount(m, 0);
376 else if (state == MOUNT_DEAD ||
377 state == MOUNT_UNMOUNTING ||
378 state == MOUNT_MOUNTING_SIGTERM ||
379 state == MOUNT_MOUNTING_SIGKILL ||
380 state == MOUNT_REMOUNTING_SIGTERM ||
381 state == MOUNT_REMOUNTING_SIGKILL ||
382 state == MOUNT_UNMOUNTING_SIGTERM ||
383 state == MOUNT_UNMOUNTING_SIGKILL ||
384 state == MOUNT_MAINTAINANCE)
385 mount_notify_automount(m, -ENODEV);
387 if (state != old_state)
388 log_debug("%s changed %s -> %s",
390 mount_state_to_string(old_state),
391 mount_state_to_string(state));
393 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
396 static int mount_coldplug(Unit *u) {
398 MountState new_state = MOUNT_DEAD;
402 assert(m->state == MOUNT_DEAD);
404 if (m->deserialized_state != m->state)
405 new_state = m->deserialized_state;
406 else if (m->from_proc_self_mountinfo)
407 new_state = MOUNT_MOUNTED;
409 if (new_state != m->state) {
411 if (new_state == MOUNT_MOUNTING ||
412 new_state == MOUNT_MOUNTING_DONE ||
413 new_state == MOUNT_REMOUNTING ||
414 new_state == MOUNT_UNMOUNTING ||
415 new_state == MOUNT_MOUNTING_SIGTERM ||
416 new_state == MOUNT_MOUNTING_SIGKILL ||
417 new_state == MOUNT_UNMOUNTING_SIGTERM ||
418 new_state == MOUNT_UNMOUNTING_SIGKILL ||
419 new_state == MOUNT_REMOUNTING_SIGTERM ||
420 new_state == MOUNT_REMOUNTING_SIGKILL) {
422 if (m->control_pid <= 0)
425 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
428 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
432 mount_set_state(m, new_state);
438 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
445 if (m->from_proc_self_mountinfo)
446 p = &m->parameters_proc_self_mountinfo;
447 else if (m->from_fragment)
448 p = &m->parameters_fragment;
450 p = &m->parameters_etc_fstab;
453 "%sMount State: %s\n"
456 "%sFile System Type: %s\n"
458 "%sFrom /etc/fstab: %s\n"
459 "%sFrom /proc/self/mountinfo: %s\n"
460 "%sFrom fragment: %s\n"
462 prefix, mount_state_to_string(m->state),
464 prefix, strna(p->what),
465 prefix, strna(p->fstype),
466 prefix, strna(p->options),
467 prefix, yes_no(m->from_etc_fstab),
468 prefix, yes_no(m->from_proc_self_mountinfo),
469 prefix, yes_no(m->from_fragment),
470 prefix, kill_mode_to_string(m->kill_mode));
472 if (m->control_pid > 0)
474 "%sControl PID: %llu\n",
475 prefix, (unsigned long long) m->control_pid);
477 exec_context_dump(&m->exec_context, f, prefix);
480 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
488 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
491 if ((r = exec_spawn(c,
497 UNIT(m)->meta.manager->confirm_spawn,
498 UNIT(m)->meta.cgroup_bondings,
502 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
503 /* FIXME: we need to do something here */
511 unit_unwatch_timer(UNIT(m), &m->timer_watch);
516 static void mount_enter_dead(Mount *m, bool success) {
522 mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
525 static void mount_enter_mounted(Mount *m, bool success) {
531 mount_set_state(m, MOUNT_MOUNTED);
534 static void mount_enter_signal(Mount *m, MountState state, bool success) {
543 if (m->kill_mode != KILL_NONE) {
544 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
545 state == MOUNT_UNMOUNTING_SIGTERM ||
546 state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
548 if (m->kill_mode == KILL_CONTROL_GROUP) {
550 if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
551 if (r != -EAGAIN && r != -ESRCH)
557 if (!sent && m->control_pid > 0)
558 if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
565 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
568 mount_set_state(m, state);
569 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
570 mount_enter_mounted(m, true);
572 mount_enter_dead(m, true);
577 log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
579 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
580 mount_enter_mounted(m, false);
582 mount_enter_dead(m, false);
585 static void mount_enter_unmounting(Mount *m, bool success) {
593 m->control_command_id = MOUNT_EXEC_UNMOUNT;
594 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
596 if ((r = exec_command_set(
603 mount_unwatch_control_pid(m);
605 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
608 mount_set_state(m, MOUNT_UNMOUNTING);
613 log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
614 mount_enter_mounted(m, false);
617 static void mount_enter_mounting(Mount *m) {
622 m->control_command_id = MOUNT_EXEC_MOUNT;
623 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
625 if (m->from_fragment)
626 r = exec_command_set(
629 m->parameters_fragment.what,
631 "-t", m->parameters_fragment.fstype,
632 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
634 else if (m->from_etc_fstab)
635 r = exec_command_set(
646 mount_unwatch_control_pid(m);
648 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
651 mount_set_state(m, MOUNT_MOUNTING);
656 log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
657 mount_enter_dead(m, false);
660 static void mount_enter_mounting_done(Mount *m) {
663 mount_set_state(m, MOUNT_MOUNTING_DONE);
666 static void mount_enter_remounting(Mount *m, bool success) {
674 m->control_command_id = MOUNT_EXEC_REMOUNT;
675 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
677 if (m->from_fragment) {
681 if (m->parameters_fragment.options) {
682 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
691 r = exec_command_set(
694 m->parameters_fragment.what,
696 "-t", m->parameters_fragment.fstype,
701 } else if (m->from_etc_fstab)
702 r = exec_command_set(
716 mount_unwatch_control_pid(m);
718 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
721 mount_set_state(m, MOUNT_REMOUNTING);
726 mount_enter_mounted(m, false);
729 static int mount_start(Unit *u) {
734 /* We cannot fulfill this request right now, try again later
736 if (m->state == MOUNT_UNMOUNTING ||
737 m->state == MOUNT_UNMOUNTING_SIGTERM ||
738 m->state == MOUNT_UNMOUNTING_SIGKILL)
742 if (m->state == MOUNT_MOUNTING ||
743 m->state == MOUNT_MOUNTING_SIGTERM ||
744 m->state == MOUNT_MOUNTING_SIGKILL)
747 assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
750 mount_enter_mounting(m);
754 static int mount_stop(Unit *u) {
759 /* Cann't do this right now. */
760 if (m->state == MOUNT_MOUNTING ||
761 m->state == MOUNT_MOUNTING_DONE ||
762 m->state == MOUNT_MOUNTING_SIGTERM ||
763 m->state == MOUNT_MOUNTING_SIGKILL ||
764 m->state == MOUNT_REMOUNTING ||
765 m->state == MOUNT_REMOUNTING_SIGTERM ||
766 m->state == MOUNT_REMOUNTING_SIGKILL)
770 if (m->state == MOUNT_UNMOUNTING ||
771 m->state == MOUNT_UNMOUNTING_SIGKILL ||
772 m->state == MOUNT_UNMOUNTING_SIGTERM)
775 assert(m->state == MOUNT_MOUNTED);
777 mount_enter_unmounting(m, true);
781 static int mount_reload(Unit *u) {
786 if (m->state == MOUNT_MOUNTING_DONE)
789 assert(m->state == MOUNT_MOUNTED);
791 mount_enter_remounting(m, true);
795 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
802 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
803 unit_serialize_item(u, f, "failure", yes_no(m->failure));
805 if (m->control_pid > 0)
806 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) m->control_pid);
808 if (m->control_command_id >= 0)
809 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
814 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
823 if (streq(key, "state")) {
826 if ((state = mount_state_from_string(value)) < 0)
827 log_debug("Failed to parse state value %s", value);
829 m->deserialized_state = state;
830 } else if (streq(key, "failure")) {
833 if ((b = parse_boolean(value)) < 0)
834 log_debug("Failed to parse failure value %s", value);
836 m->failure = b || m->failure;
838 } else if (streq(key, "control-pid")) {
841 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
842 log_debug("Failed to parse control-pid value %s", value);
844 m->control_pid = (pid_t) pid;
845 } else if (streq(key, "control-command")) {
848 if ((id = mount_exec_command_from_string(value)) < 0)
849 log_debug("Failed to parse exec-command value %s", value);
851 m->control_command_id = id;
852 m->control_command = m->exec_command + id;
856 log_debug("Unknown serialization key '%s'", key);
861 static UnitActiveState mount_active_state(Unit *u) {
864 return state_translation_table[MOUNT(u)->state];
867 static const char *mount_sub_state_to_string(Unit *u) {
870 return mount_state_to_string(MOUNT(u)->state);
873 static bool mount_check_gc(Unit *u) {
878 return m->from_etc_fstab || m->from_proc_self_mountinfo;
881 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
888 success = code == CLD_EXITED && status == 0;
889 m->failure = m->failure || !success;
891 assert(m->control_pid == pid);
894 if (m->control_command) {
895 exec_status_fill(&m->control_command->exec_status, pid, code, status);
896 m->control_command = NULL;
897 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
900 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
902 /* Note that mount(8) returning and the kernel sending us a
903 * mount table change event might happen out-of-order. If an
904 * operation succeed we assume the kernel will follow soon too
905 * and already change into the resulting state. If it fails
906 * we check if the kernel still knows about the mount. and
907 * change state accordingly. */
912 case MOUNT_MOUNTING_DONE:
913 case MOUNT_MOUNTING_SIGKILL:
914 case MOUNT_MOUNTING_SIGTERM:
915 case MOUNT_REMOUNTING:
916 case MOUNT_REMOUNTING_SIGKILL:
917 case MOUNT_REMOUNTING_SIGTERM:
919 if (success && m->from_proc_self_mountinfo)
920 mount_enter_mounted(m, true);
921 else if (m->from_proc_self_mountinfo)
922 mount_enter_mounted(m, false);
924 mount_enter_dead(m, false);
927 case MOUNT_UNMOUNTING:
928 case MOUNT_UNMOUNTING_SIGKILL:
929 case MOUNT_UNMOUNTING_SIGTERM:
932 mount_enter_dead(m, true);
933 else if (m->from_proc_self_mountinfo)
934 mount_enter_mounted(m, false);
936 mount_enter_dead(m, false);
940 assert_not_reached("Uh, control process died at wrong time.");
944 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
948 assert(elapsed == 1);
949 assert(w == &m->timer_watch);
954 case MOUNT_MOUNTING_DONE:
955 log_warning("%s mounting timed out. Stopping.", u->meta.id);
956 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
959 case MOUNT_REMOUNTING:
960 log_warning("%s remounting timed out. Stopping.", u->meta.id);
961 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
964 case MOUNT_UNMOUNTING:
965 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
966 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
969 case MOUNT_MOUNTING_SIGTERM:
970 log_warning("%s mounting timed out. Killing.", u->meta.id);
971 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
974 case MOUNT_REMOUNTING_SIGTERM:
975 log_warning("%s remounting timed out. Killing.", u->meta.id);
976 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
979 case MOUNT_UNMOUNTING_SIGTERM:
980 log_warning("%s unmounting timed out. Killing.", u->meta.id);
981 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
984 case MOUNT_MOUNTING_SIGKILL:
985 case MOUNT_REMOUNTING_SIGKILL:
986 case MOUNT_UNMOUNTING_SIGKILL:
987 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
989 if (m->from_proc_self_mountinfo)
990 mount_enter_mounted(m, false);
992 mount_enter_dead(m, false);
996 assert_not_reached("Timeout at wrong time.");
1000 static int mount_add_one(
1004 const char *options,
1006 bool from_proc_self_mountinfo,
1011 char *e, *w = NULL, *o = NULL, *f = NULL;
1012 MountParameters *mp;
1020 assert(!set_flags || from_proc_self_mountinfo);
1022 /* Ignore API mount points. They should never be referenced in
1023 * dependencies ever. */
1024 if (mount_point_is_api(where))
1027 if (streq(fstype, "autofs"))
1030 /* probably some kind of swap, which we don't cover for now */
1031 if (where[0] != '/')
1034 if (!(e = unit_name_from_path(where, ".mount")))
1037 if (!(u = manager_get_unit(m, e))) {
1040 if (!(u = unit_new(m))) {
1045 r = unit_add_name(u, e);
1051 if (!(MOUNT(u)->where = strdup(where))) {
1056 if ((r = unit_set_description(u, where)) < 0)
1059 unit_add_to_load_queue(u);
1065 if (!(w = strdup(what)) ||
1066 !(o = strdup(options)) ||
1067 !(f = strdup(fstype))) {
1072 if (from_proc_self_mountinfo) {
1073 mp = &MOUNT(u)->parameters_proc_self_mountinfo;
1076 MOUNT(u)->is_mounted = true;
1077 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1078 MOUNT(u)->just_changed = !streq_ptr(MOUNT(u)->parameters_proc_self_mountinfo.options, o);
1081 MOUNT(u)->from_proc_self_mountinfo = true;
1084 mp = &MOUNT(u)->parameters_etc_fstab;
1086 MOUNT(u)->from_etc_fstab = true;
1098 unit_add_to_dbus_queue(u);
1113 static char *fstab_node_to_udev_node(char *p) {
1117 /* FIXME: to follow udev's logic 100% we need to leave valid
1118 * UTF8 chars unescaped */
1120 if (startswith(p, "LABEL=")) {
1122 if (!(t = xescape(p+6, "/ ")))
1125 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1134 if (startswith(p, "UUID=")) {
1136 if (!(t = xescape(p+5, "/ ")))
1139 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1151 static int mount_load_etc_fstab(Manager *m) {
1159 if (!(f = setmntent("/etc/fstab", "r")))
1162 while ((me = getmntent(f))) {
1165 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1170 if (!(where = strdup(me->mnt_dir))) {
1177 path_kill_slashes(what);
1179 if (where[0] == '/')
1180 path_kill_slashes(where);
1182 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1197 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1199 char *device, *path, *options, *fstype, *d, *p;
1203 rewind(m->proc_self_mountinfo);
1208 device = path = options = fstype = d = p = NULL;
1210 if ((k = fscanf(m->proc_self_mountinfo,
1211 "%*s " /* (1) mount id */
1212 "%*s " /* (2) parent id */
1213 "%*s " /* (3) major:minor */
1214 "%*s " /* (4) root */
1215 "%ms " /* (5) mount point */
1216 "%ms" /* (6) mount options */
1217 "%*[^-]" /* (7) optional fields */
1218 "- " /* (8) seperator */
1219 "%ms " /* (9) file system type */
1220 "%ms" /* (10) mount source */
1221 "%*[^\n]", /* some rubbish at the end */
1234 if (!(d = cunescape(device)) ||
1235 !(p = cunescape(path))) {
1240 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1264 static void mount_shutdown(Manager *m) {
1267 if (m->proc_self_mountinfo) {
1268 fclose(m->proc_self_mountinfo);
1269 m->proc_self_mountinfo = NULL;
1273 static int mount_enumerate(Manager *m) {
1275 struct epoll_event ev;
1278 if (!m->proc_self_mountinfo) {
1279 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1282 m->mount_watch.type = WATCH_MOUNT;
1283 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1286 ev.events = EPOLLERR;
1287 ev.data.ptr = &m->mount_watch;
1289 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1293 if ((r = mount_load_etc_fstab(m)) < 0)
1296 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1306 void mount_fd_event(Manager *m, int events) {
1311 assert(events == EPOLLERR);
1313 /* The manager calls this for every fd event happening on the
1314 * /proc/self/mountinfo file, which informs us about mounting
1317 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1318 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno));
1320 /* Reset flags, just in case, for later calls */
1321 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1322 Mount *mount = (Mount*) meta;
1324 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1330 manager_dispatch_load_queue(m);
1332 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1333 Mount *mount = (Mount*) meta;
1335 if (!mount->is_mounted) {
1336 /* This has just been unmounted. */
1338 mount->from_proc_self_mountinfo = false;
1340 switch (mount->state) {
1343 mount_enter_dead(mount, true);
1347 mount_set_state(mount, mount->state);
1352 } else if (mount->just_mounted || mount->just_changed) {
1354 /* New or changed entrymount */
1356 switch (mount->state) {
1359 case MOUNT_MAINTAINANCE:
1360 mount_enter_mounted(mount, true);
1363 case MOUNT_MOUNTING:
1364 mount_enter_mounting_done(mount);
1368 /* Nothing really changed, but let's
1369 * issue an notification call
1370 * nonetheless, in case somebody is
1371 * waiting for this. (e.g. file system
1372 * ro/rw remounts.) */
1373 mount_set_state(mount, mount->state);
1378 /* Reset the flags for later calls */
1379 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1383 int mount_path_is_mounted(Manager *m, const char* path) {
1393 if (!(t = strdup(path)))
1396 path_kill_slashes(t);
1402 if (!(e = unit_name_from_path(t, ".mount"))) {
1407 u = manager_get_unit(m, e);
1411 (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1412 MOUNT(u)->state != MOUNT_MOUNTED) {
1417 assert_se(slash = strrchr(t, '/'));
1434 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1435 [MOUNT_DEAD] = "dead",
1436 [MOUNT_MOUNTING] = "mounting",
1437 [MOUNT_MOUNTING_DONE] = "mounting-done",
1438 [MOUNT_MOUNTED] = "mounted",
1439 [MOUNT_REMOUNTING] = "remounting",
1440 [MOUNT_UNMOUNTING] = "unmounting",
1441 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1442 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1443 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1444 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1445 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1446 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1447 [MOUNT_MAINTAINANCE] = "maintainance"
1450 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1452 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1453 [MOUNT_EXEC_MOUNT] = "ExecMount",
1454 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1455 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1458 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1460 const UnitVTable mount_vtable = {
1464 .no_instances = true,
1471 .coldplug = mount_coldplug,
1475 .start = mount_start,
1477 .reload = mount_reload,
1479 .serialize = mount_serialize,
1480 .deserialize_item = mount_deserialize_item,
1482 .active_state = mount_active_state,
1483 .sub_state_to_string = mount_sub_state_to_string,
1485 .check_gc = mount_check_gc,
1487 .sigchld_event = mount_sigchld_event,
1488 .timer_event = mount_timer_event,
1490 .bus_message_handler = bus_mount_message_handler,
1492 .enumerate = mount_enumerate,
1493 .shutdown = mount_shutdown