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_mount_links(Mount *m) {
122 /* Adds in links to other mount points that might lie below or
123 * above us in the hierarchy */
125 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
126 Mount *n = (Mount*) other;
131 if (n->meta.load_state != UNIT_LOADED)
134 if (path_startswith(m->where, n->where)) {
136 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
139 if (n->from_etc_fstab || n->from_fragment)
140 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
143 } else if (path_startswith(n->where, m->where)) {
145 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
148 if (m->from_etc_fstab || m->from_fragment)
149 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
157 static int mount_add_swap_links(Mount *m) {
163 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
164 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
170 static int mount_add_automount_links(Mount *m) {
176 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
177 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
183 static int mount_add_socket_links(Mount *m) {
189 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
190 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
196 static char* mount_test_option(const char *haystack, const char *needle) {
201 /* Like glibc's hasmntopt(), but works on a string, not a
208 me.mnt_opts = (char*) haystack;
210 return hasmntopt(&me, needle);
213 static int mount_add_target_links(Mount *m) {
218 bool noauto, handle, automount;
222 if (m->from_fragment)
223 p = &m->parameters_fragment;
224 else if (m->from_etc_fstab)
225 p = &m->parameters_etc_fstab;
229 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
230 handle = !!mount_test_option(p->options, "comment=systemd.mount");
231 automount = !!mount_test_option(p->options, "comment=systemd.automount");
233 if (noauto && !handle && !automount)
236 if (mount_test_option(p->options, "_netdev") ||
237 fstype_is_network(p->fstype))
238 target = SPECIAL_REMOTE_FS_TARGET;
240 target = SPECIAL_LOCAL_FS_TARGET;
242 if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0)
248 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
251 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(am), true)) < 0)
254 return unit_add_dependency(UNIT(am), UNIT_BEFORE, tu, true);
259 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
262 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
266 static int mount_verify(Mount *m) {
271 if (UNIT(m)->meta.load_state != UNIT_LOADED)
274 if (!(e = unit_name_from_path(m->where, ".mount")))
277 b = unit_has_name(UNIT(m), e);
281 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
288 static int mount_load(Unit *u) {
293 assert(u->meta.load_state == UNIT_STUB);
295 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
298 /* This is a new unit? Then let's add in some extras */
299 if (u->meta.load_state == UNIT_LOADED) {
300 const char *what = m->parameters_fragment.what;
303 what = m->parameters_etc_fstab.what;
306 if (!(m->where = unit_name_to_path(u->meta.id)))
309 path_kill_slashes(m->where);
311 /* Minor validity checking */
312 if ((m->parameters_fragment.options || m->parameters_fragment.fstype) && !m->parameters_fragment.what)
315 if (m->parameters_fragment.what)
316 m->from_fragment = true;
318 if ((r = unit_add_node_link(u, what,
319 (u->meta.manager->running_as == MANAGER_INIT ||
320 u->meta.manager->running_as == MANAGER_SYSTEM))) < 0)
323 if ((r = mount_add_mount_links(m)) < 0)
326 if ((r = mount_add_socket_links(m)) < 0)
329 if ((r = mount_add_swap_links(m)) < 0)
332 if ((r = mount_add_automount_links(m)) < 0)
335 if ((r = mount_add_target_links(m)) < 0)
338 if ((r = unit_add_default_cgroup(u)) < 0)
342 return mount_verify(m);
345 static int mount_notify_automount(Mount *m, int status) {
351 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
352 return r == -ENOENT ? 0 : r;
354 return automount_send_ready(AUTOMOUNT(p), status);
357 static void mount_set_state(Mount *m, MountState state) {
358 MountState old_state;
361 old_state = m->state;
364 if (state != MOUNT_MOUNTING &&
365 state != MOUNT_MOUNTING_DONE &&
366 state != MOUNT_REMOUNTING &&
367 state != MOUNT_UNMOUNTING &&
368 state != MOUNT_MOUNTING_SIGTERM &&
369 state != MOUNT_MOUNTING_SIGKILL &&
370 state != MOUNT_UNMOUNTING_SIGTERM &&
371 state != MOUNT_UNMOUNTING_SIGKILL &&
372 state != MOUNT_REMOUNTING_SIGTERM &&
373 state != MOUNT_REMOUNTING_SIGKILL) {
374 unit_unwatch_timer(UNIT(m), &m->timer_watch);
375 mount_unwatch_control_pid(m);
376 m->control_command = NULL;
377 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
380 if (state == MOUNT_MOUNTED ||
381 state == MOUNT_REMOUNTING)
382 mount_notify_automount(m, 0);
383 else if (state == MOUNT_DEAD ||
384 state == MOUNT_UNMOUNTING ||
385 state == MOUNT_MOUNTING_SIGTERM ||
386 state == MOUNT_MOUNTING_SIGKILL ||
387 state == MOUNT_REMOUNTING_SIGTERM ||
388 state == MOUNT_REMOUNTING_SIGKILL ||
389 state == MOUNT_UNMOUNTING_SIGTERM ||
390 state == MOUNT_UNMOUNTING_SIGKILL ||
391 state == MOUNT_MAINTAINANCE)
392 mount_notify_automount(m, -ENODEV);
394 if (state != old_state)
395 log_debug("%s changed %s -> %s",
397 mount_state_to_string(old_state),
398 mount_state_to_string(state));
400 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
403 static int mount_coldplug(Unit *u) {
405 MountState new_state = MOUNT_DEAD;
409 assert(m->state == MOUNT_DEAD);
411 if (m->deserialized_state != m->state)
412 new_state = m->deserialized_state;
413 else if (m->from_proc_self_mountinfo)
414 new_state = MOUNT_MOUNTED;
416 if (new_state != m->state) {
418 if (new_state == MOUNT_MOUNTING ||
419 new_state == MOUNT_MOUNTING_DONE ||
420 new_state == MOUNT_REMOUNTING ||
421 new_state == MOUNT_UNMOUNTING ||
422 new_state == MOUNT_MOUNTING_SIGTERM ||
423 new_state == MOUNT_MOUNTING_SIGKILL ||
424 new_state == MOUNT_UNMOUNTING_SIGTERM ||
425 new_state == MOUNT_UNMOUNTING_SIGKILL ||
426 new_state == MOUNT_REMOUNTING_SIGTERM ||
427 new_state == MOUNT_REMOUNTING_SIGKILL) {
429 if (m->control_pid <= 0)
432 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
435 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
439 mount_set_state(m, new_state);
445 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
452 if (m->from_proc_self_mountinfo)
453 p = &m->parameters_proc_self_mountinfo;
454 else if (m->from_fragment)
455 p = &m->parameters_fragment;
457 p = &m->parameters_etc_fstab;
460 "%sMount State: %s\n"
463 "%sFile System Type: %s\n"
465 "%sFrom /etc/fstab: %s\n"
466 "%sFrom /proc/self/mountinfo: %s\n"
467 "%sFrom fragment: %s\n"
469 prefix, mount_state_to_string(m->state),
471 prefix, strna(p->what),
472 prefix, strna(p->fstype),
473 prefix, strna(p->options),
474 prefix, yes_no(m->from_etc_fstab),
475 prefix, yes_no(m->from_proc_self_mountinfo),
476 prefix, yes_no(m->from_fragment),
477 prefix, kill_mode_to_string(m->kill_mode));
479 if (m->control_pid > 0)
481 "%sControl PID: %llu\n",
482 prefix, (unsigned long long) m->control_pid);
484 exec_context_dump(&m->exec_context, f, prefix);
487 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
495 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
498 if ((r = exec_spawn(c,
502 m->meta.manager->environment,
505 UNIT(m)->meta.manager->confirm_spawn,
506 UNIT(m)->meta.cgroup_bondings,
510 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
511 /* FIXME: we need to do something here */
519 unit_unwatch_timer(UNIT(m), &m->timer_watch);
524 static void mount_enter_dead(Mount *m, bool success) {
530 mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
533 static void mount_enter_mounted(Mount *m, bool success) {
539 mount_set_state(m, MOUNT_MOUNTED);
542 static void mount_enter_signal(Mount *m, MountState state, bool success) {
551 if (m->kill_mode != KILL_NONE) {
552 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
553 state == MOUNT_UNMOUNTING_SIGTERM ||
554 state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
556 if (m->kill_mode == KILL_CONTROL_GROUP) {
558 if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
559 if (r != -EAGAIN && r != -ESRCH)
565 if (!sent && m->control_pid > 0)
566 if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
573 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
576 mount_set_state(m, state);
577 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
578 mount_enter_mounted(m, true);
580 mount_enter_dead(m, true);
585 log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
587 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
588 mount_enter_mounted(m, false);
590 mount_enter_dead(m, false);
593 static void mount_enter_unmounting(Mount *m, bool success) {
601 m->control_command_id = MOUNT_EXEC_UNMOUNT;
602 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
604 if ((r = exec_command_set(
611 mount_unwatch_control_pid(m);
613 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
616 mount_set_state(m, MOUNT_UNMOUNTING);
621 log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
622 mount_enter_mounted(m, false);
625 static void mount_enter_mounting(Mount *m) {
630 m->control_command_id = MOUNT_EXEC_MOUNT;
631 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
633 if (m->from_fragment)
634 r = exec_command_set(
637 m->parameters_fragment.what,
639 "-t", m->parameters_fragment.fstype,
640 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
642 else if (m->from_etc_fstab)
643 r = exec_command_set(
654 mount_unwatch_control_pid(m);
656 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
659 mount_set_state(m, MOUNT_MOUNTING);
664 log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
665 mount_enter_dead(m, false);
668 static void mount_enter_mounting_done(Mount *m) {
671 mount_set_state(m, MOUNT_MOUNTING_DONE);
674 static void mount_enter_remounting(Mount *m, bool success) {
682 m->control_command_id = MOUNT_EXEC_REMOUNT;
683 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
685 if (m->from_fragment) {
689 if (m->parameters_fragment.options) {
690 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
699 r = exec_command_set(
702 m->parameters_fragment.what,
704 "-t", m->parameters_fragment.fstype,
709 } else if (m->from_etc_fstab)
710 r = exec_command_set(
724 mount_unwatch_control_pid(m);
726 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
729 mount_set_state(m, MOUNT_REMOUNTING);
734 mount_enter_mounted(m, false);
737 static int mount_start(Unit *u) {
742 /* We cannot fulfill this request right now, try again later
744 if (m->state == MOUNT_UNMOUNTING ||
745 m->state == MOUNT_UNMOUNTING_SIGTERM ||
746 m->state == MOUNT_UNMOUNTING_SIGKILL)
750 if (m->state == MOUNT_MOUNTING ||
751 m->state == MOUNT_MOUNTING_SIGTERM ||
752 m->state == MOUNT_MOUNTING_SIGKILL)
755 assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
758 mount_enter_mounting(m);
762 static int mount_stop(Unit *u) {
767 /* Cann't do this right now. */
768 if (m->state == MOUNT_MOUNTING ||
769 m->state == MOUNT_MOUNTING_DONE ||
770 m->state == MOUNT_MOUNTING_SIGTERM ||
771 m->state == MOUNT_MOUNTING_SIGKILL ||
772 m->state == MOUNT_REMOUNTING ||
773 m->state == MOUNT_REMOUNTING_SIGTERM ||
774 m->state == MOUNT_REMOUNTING_SIGKILL)
778 if (m->state == MOUNT_UNMOUNTING ||
779 m->state == MOUNT_UNMOUNTING_SIGKILL ||
780 m->state == MOUNT_UNMOUNTING_SIGTERM)
783 assert(m->state == MOUNT_MOUNTED);
785 mount_enter_unmounting(m, true);
789 static int mount_reload(Unit *u) {
794 if (m->state == MOUNT_MOUNTING_DONE)
797 assert(m->state == MOUNT_MOUNTED);
799 mount_enter_remounting(m, true);
803 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
810 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
811 unit_serialize_item(u, f, "failure", yes_no(m->failure));
813 if (m->control_pid > 0)
814 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) m->control_pid);
816 if (m->control_command_id >= 0)
817 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
822 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
831 if (streq(key, "state")) {
834 if ((state = mount_state_from_string(value)) < 0)
835 log_debug("Failed to parse state value %s", value);
837 m->deserialized_state = state;
838 } else if (streq(key, "failure")) {
841 if ((b = parse_boolean(value)) < 0)
842 log_debug("Failed to parse failure value %s", value);
844 m->failure = b || m->failure;
846 } else if (streq(key, "control-pid")) {
849 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
850 log_debug("Failed to parse control-pid value %s", value);
852 m->control_pid = (pid_t) pid;
853 } else if (streq(key, "control-command")) {
856 if ((id = mount_exec_command_from_string(value)) < 0)
857 log_debug("Failed to parse exec-command value %s", value);
859 m->control_command_id = id;
860 m->control_command = m->exec_command + id;
864 log_debug("Unknown serialization key '%s'", key);
869 static UnitActiveState mount_active_state(Unit *u) {
872 return state_translation_table[MOUNT(u)->state];
875 static const char *mount_sub_state_to_string(Unit *u) {
878 return mount_state_to_string(MOUNT(u)->state);
881 static bool mount_check_gc(Unit *u) {
886 return m->from_etc_fstab || m->from_proc_self_mountinfo;
889 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
896 success = code == CLD_EXITED && status == 0;
897 m->failure = m->failure || !success;
899 assert(m->control_pid == pid);
902 if (m->control_command) {
903 exec_status_fill(&m->control_command->exec_status, pid, code, status);
904 m->control_command = NULL;
905 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
908 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
910 /* Note that mount(8) returning and the kernel sending us a
911 * mount table change event might happen out-of-order. If an
912 * operation succeed we assume the kernel will follow soon too
913 * and already change into the resulting state. If it fails
914 * we check if the kernel still knows about the mount. and
915 * change state accordingly. */
920 case MOUNT_MOUNTING_DONE:
921 case MOUNT_MOUNTING_SIGKILL:
922 case MOUNT_MOUNTING_SIGTERM:
923 case MOUNT_REMOUNTING:
924 case MOUNT_REMOUNTING_SIGKILL:
925 case MOUNT_REMOUNTING_SIGTERM:
927 if (success && m->from_proc_self_mountinfo)
928 mount_enter_mounted(m, true);
929 else if (m->from_proc_self_mountinfo)
930 mount_enter_mounted(m, false);
932 mount_enter_dead(m, false);
935 case MOUNT_UNMOUNTING:
936 case MOUNT_UNMOUNTING_SIGKILL:
937 case MOUNT_UNMOUNTING_SIGTERM:
940 mount_enter_dead(m, true);
941 else if (m->from_proc_self_mountinfo)
942 mount_enter_mounted(m, false);
944 mount_enter_dead(m, false);
948 assert_not_reached("Uh, control process died at wrong time.");
952 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
956 assert(elapsed == 1);
957 assert(w == &m->timer_watch);
962 case MOUNT_MOUNTING_DONE:
963 log_warning("%s mounting timed out. Stopping.", u->meta.id);
964 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
967 case MOUNT_REMOUNTING:
968 log_warning("%s remounting timed out. Stopping.", u->meta.id);
969 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
972 case MOUNT_UNMOUNTING:
973 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
974 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
977 case MOUNT_MOUNTING_SIGTERM:
978 log_warning("%s mounting timed out. Killing.", u->meta.id);
979 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
982 case MOUNT_REMOUNTING_SIGTERM:
983 log_warning("%s remounting timed out. Killing.", u->meta.id);
984 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
987 case MOUNT_UNMOUNTING_SIGTERM:
988 log_warning("%s unmounting timed out. Killing.", u->meta.id);
989 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
992 case MOUNT_MOUNTING_SIGKILL:
993 case MOUNT_REMOUNTING_SIGKILL:
994 case MOUNT_UNMOUNTING_SIGKILL:
995 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
997 if (m->from_proc_self_mountinfo)
998 mount_enter_mounted(m, false);
1000 mount_enter_dead(m, false);
1004 assert_not_reached("Timeout at wrong time.");
1008 static int mount_add_one(
1012 const char *options,
1014 bool from_proc_self_mountinfo,
1019 char *e, *w = NULL, *o = NULL, *f = NULL;
1020 MountParameters *mp;
1028 assert(!set_flags || from_proc_self_mountinfo);
1030 /* Ignore API mount points. They should never be referenced in
1031 * dependencies ever. */
1032 if (mount_point_is_api(where))
1035 if (streq(fstype, "autofs"))
1038 /* probably some kind of swap, which we don't cover for now */
1039 if (where[0] != '/')
1042 if (!(e = unit_name_from_path(where, ".mount")))
1045 if (!(u = manager_get_unit(m, e))) {
1048 if (!(u = unit_new(m))) {
1053 r = unit_add_name(u, e);
1059 if (!(MOUNT(u)->where = strdup(where))) {
1064 if ((r = unit_set_description(u, where)) < 0)
1067 unit_add_to_load_queue(u);
1073 if (!(w = strdup(what)) ||
1074 !(o = strdup(options)) ||
1075 !(f = strdup(fstype))) {
1080 if (from_proc_self_mountinfo) {
1081 mp = &MOUNT(u)->parameters_proc_self_mountinfo;
1084 MOUNT(u)->is_mounted = true;
1085 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1086 MOUNT(u)->just_changed = !streq_ptr(MOUNT(u)->parameters_proc_self_mountinfo.options, o);
1089 MOUNT(u)->from_proc_self_mountinfo = true;
1092 mp = &MOUNT(u)->parameters_etc_fstab;
1094 MOUNT(u)->from_etc_fstab = true;
1106 unit_add_to_dbus_queue(u);
1121 static char *fstab_node_to_udev_node(char *p) {
1125 /* FIXME: to follow udev's logic 100% we need to leave valid
1126 * UTF8 chars unescaped */
1128 if (startswith(p, "LABEL=")) {
1130 if (!(t = xescape(p+6, "/ ")))
1133 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1142 if (startswith(p, "UUID=")) {
1144 if (!(t = xescape(p+5, "/ ")))
1147 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1159 static int mount_find_pri(char *options) {
1163 if (!(pri = mount_test_option(options, "pri=")))
1169 r = strtoul(pri, &end, 10);
1174 if (end == pri || (*end != ',' && *end != 0))
1180 static int mount_load_etc_fstab(Manager *m) {
1188 if (!(f = setmntent("/etc/fstab", "r")))
1191 while ((me = getmntent(f))) {
1194 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1199 if (!(where = strdup(me->mnt_dir))) {
1206 path_kill_slashes(what);
1208 if (where[0] == '/')
1209 path_kill_slashes(where);
1211 if (streq(me->mnt_type, "swap")) {
1214 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1219 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1223 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1239 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1241 char *device, *path, *options, *fstype, *d, *p;
1245 rewind(m->proc_self_mountinfo);
1250 device = path = options = fstype = d = p = NULL;
1252 if ((k = fscanf(m->proc_self_mountinfo,
1253 "%*s " /* (1) mount id */
1254 "%*s " /* (2) parent id */
1255 "%*s " /* (3) major:minor */
1256 "%*s " /* (4) root */
1257 "%ms " /* (5) mount point */
1258 "%ms" /* (6) mount options */
1259 "%*[^-]" /* (7) optional fields */
1260 "- " /* (8) seperator */
1261 "%ms " /* (9) file system type */
1262 "%ms" /* (10) mount source */
1263 "%*[^\n]", /* some rubbish at the end */
1276 if (!(d = cunescape(device)) ||
1277 !(p = cunescape(path))) {
1282 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1306 static void mount_shutdown(Manager *m) {
1309 if (m->proc_self_mountinfo) {
1310 fclose(m->proc_self_mountinfo);
1311 m->proc_self_mountinfo = NULL;
1315 static int mount_enumerate(Manager *m) {
1317 struct epoll_event ev;
1320 if (!m->proc_self_mountinfo) {
1321 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1324 m->mount_watch.type = WATCH_MOUNT;
1325 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1328 ev.events = EPOLLERR;
1329 ev.data.ptr = &m->mount_watch;
1331 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1335 if ((r = mount_load_etc_fstab(m)) < 0)
1338 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1348 void mount_fd_event(Manager *m, int events) {
1353 assert(events == EPOLLERR);
1355 /* The manager calls this for every fd event happening on the
1356 * /proc/self/mountinfo file, which informs us about mounting
1359 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1360 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno));
1362 /* Reset flags, just in case, for later calls */
1363 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1364 Mount *mount = (Mount*) meta;
1366 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1372 manager_dispatch_load_queue(m);
1374 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1375 Mount *mount = (Mount*) meta;
1377 if (!mount->is_mounted) {
1378 /* This has just been unmounted. */
1380 mount->from_proc_self_mountinfo = false;
1382 switch (mount->state) {
1385 mount_enter_dead(mount, true);
1389 mount_set_state(mount, mount->state);
1394 } else if (mount->just_mounted || mount->just_changed) {
1396 /* New or changed entrymount */
1398 switch (mount->state) {
1401 case MOUNT_MAINTAINANCE:
1402 mount_enter_mounted(mount, true);
1405 case MOUNT_MOUNTING:
1406 mount_enter_mounting_done(mount);
1410 /* Nothing really changed, but let's
1411 * issue an notification call
1412 * nonetheless, in case somebody is
1413 * waiting for this. (e.g. file system
1414 * ro/rw remounts.) */
1415 mount_set_state(mount, mount->state);
1420 /* Reset the flags for later calls */
1421 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1425 int mount_path_is_mounted(Manager *m, const char* path) {
1435 if (!(t = strdup(path)))
1438 path_kill_slashes(t);
1444 if (!(e = unit_name_from_path(t, ".mount"))) {
1449 u = manager_get_unit(m, e);
1453 (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1454 MOUNT(u)->state != MOUNT_MOUNTED) {
1459 assert_se(slash = strrchr(t, '/'));
1476 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1477 [MOUNT_DEAD] = "dead",
1478 [MOUNT_MOUNTING] = "mounting",
1479 [MOUNT_MOUNTING_DONE] = "mounting-done",
1480 [MOUNT_MOUNTED] = "mounted",
1481 [MOUNT_REMOUNTING] = "remounting",
1482 [MOUNT_UNMOUNTING] = "unmounting",
1483 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1484 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1485 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1486 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1487 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1488 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1489 [MOUNT_MAINTAINANCE] = "maintainance"
1492 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1494 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1495 [MOUNT_EXEC_MOUNT] = "ExecMount",
1496 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1497 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1500 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1502 const UnitVTable mount_vtable = {
1506 .no_instances = true,
1513 .coldplug = mount_coldplug,
1517 .start = mount_start,
1519 .reload = mount_reload,
1521 .serialize = mount_serialize,
1522 .deserialize_item = mount_deserialize_item,
1524 .active_state = mount_active_state,
1525 .sub_state_to_string = mount_sub_state_to_string,
1527 .check_gc = mount_check_gc,
1529 .sigchld_event = mount_sigchld_event,
1530 .timer_event = mount_timer_event,
1532 .bus_message_handler = bus_mount_message_handler,
1534 .enumerate = mount_enumerate,
1535 .shutdown = mount_shutdown