1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/epoll.h>
30 #include "load-fragment.h"
31 #include "load-dropin.h"
34 #include "mount-setup.h"
35 #include "unit-name.h"
37 #include "dbus-mount.h"
40 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
41 [MOUNT_DEAD] = UNIT_INACTIVE,
42 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
43 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
44 [MOUNT_MOUNTED] = UNIT_ACTIVE,
45 [MOUNT_REMOUNTING] = UNIT_RELOADING,
46 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
47 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
48 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
49 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
50 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
51 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
52 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
53 [MOUNT_MAINTENANCE] = UNIT_MAINTENANCE
56 static void mount_init(Unit *u) {
60 assert(u->meta.load_state == UNIT_STUB);
62 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
63 m->directory_mode = 0755;
65 exec_context_init(&m->exec_context);
67 /* We need to make sure that /bin/mount is always called in
68 * the same process group as us, so that the autofs kernel
69 * side doesn't send us another mount request while we are
70 * already trying to comply its last one. */
71 m->exec_context.same_pgrp = true;
73 m->timer_watch.type = WATCH_INVALID;
75 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
78 static void mount_unwatch_control_pid(Mount *m) {
81 if (m->control_pid <= 0)
84 unit_unwatch_pid(UNIT(m), m->control_pid);
88 static void mount_parameters_done(MountParameters *p) {
95 p->what = p->options = p->fstype = NULL;
98 static void mount_done(Unit *u) {
106 mount_parameters_done(&m->parameters_etc_fstab);
107 mount_parameters_done(&m->parameters_proc_self_mountinfo);
108 mount_parameters_done(&m->parameters_fragment);
110 exec_context_done(&m->exec_context);
111 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
112 m->control_command = NULL;
114 mount_unwatch_control_pid(m);
116 unit_unwatch_timer(u, &m->timer_watch);
119 static int mount_add_mount_links(Mount *m) {
125 /* Adds in links to other mount points that might lie below or
126 * above us in the hierarchy */
128 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
129 Mount *n = (Mount*) other;
134 if (n->meta.load_state != UNIT_LOADED)
137 if (path_startswith(m->where, n->where)) {
139 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
142 if (n->from_etc_fstab || n->from_fragment)
143 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
146 } else if (path_startswith(n->where, m->where)) {
148 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
151 if (m->from_etc_fstab || m->from_fragment)
152 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
160 static int mount_add_swap_links(Mount *m) {
166 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
167 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
173 static int mount_add_path_links(Mount *m) {
179 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
180 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
186 static int mount_add_automount_links(Mount *m) {
192 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
193 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
199 static int mount_add_socket_links(Mount *m) {
205 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
206 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
212 static char* mount_test_option(const char *haystack, const char *needle) {
217 /* Like glibc's hasmntopt(), but works on a string, not a
224 me.mnt_opts = (char*) haystack;
226 return hasmntopt(&me, needle);
229 static int mount_add_target_links(Mount *m) {
234 bool noauto, handle, automount, user;
238 if (m->from_fragment)
239 p = &m->parameters_fragment;
240 else if (m->from_etc_fstab)
241 p = &m->parameters_etc_fstab;
245 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
246 user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
247 handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
248 m->meta.manager->mount_auto;
249 automount = !!mount_test_option(p->options, "comment=systemd.automount");
251 if (mount_test_option(p->options, "_netdev") ||
252 fstype_is_network(p->fstype))
253 target = SPECIAL_REMOTE_FS_TARGET;
255 target = SPECIAL_LOCAL_FS_TARGET;
257 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
260 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
263 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
266 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
269 /* Automatically add mount points that aren't natively
270 * configured to local-fs.target */
274 if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
275 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
278 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
282 static int mount_add_device_links(Mount *m) {
288 if (m->from_fragment)
289 p = &m->parameters_fragment;
290 else if (m->from_etc_fstab)
291 p = &m->parameters_etc_fstab;
295 if (!p->what || path_equal(m->where, "/"))
298 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
299 nofail = !!mount_test_option(p->options, "nofail");
301 return unit_add_node_link(UNIT(m), p->what,
303 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM);
306 static int mount_add_default_dependencies(Mount *m) {
311 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
312 !path_equal(m->where, "/")) {
314 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0)
317 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
324 static int mount_verify(Mount *m) {
329 if (m->meta.load_state != UNIT_LOADED)
332 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
335 if (!(e = unit_name_from_path(m->where, ".mount")))
338 b = unit_has_name(UNIT(m), e);
342 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
346 if (m->meta.fragment_path && !m->parameters_fragment.what) {
347 log_error("%s's What setting is missing. Refusing.", m->meta.id);
351 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
352 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
359 static int mount_load(Unit *u) {
364 assert(u->meta.load_state == UNIT_STUB);
366 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
369 /* This is a new unit? Then let's add in some extras */
370 if (u->meta.load_state == UNIT_LOADED) {
371 const char *what = NULL;
373 if (m->meta.fragment_path)
374 m->from_fragment = true;
377 if (!(m->where = unit_name_to_path(u->meta.id)))
380 path_kill_slashes(m->where);
382 if (!m->meta.description)
383 if ((r = unit_set_description(u, m->where)) < 0)
386 if (m->from_fragment && m->parameters_fragment.what)
387 what = m->parameters_fragment.what;
388 else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
389 what = m->parameters_etc_fstab.what;
390 else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
391 what = m->parameters_proc_self_mountinfo.what;
393 if ((r = mount_add_device_links(m)) < 0)
396 if ((r = mount_add_mount_links(m)) < 0)
399 if ((r = mount_add_socket_links(m)) < 0)
402 if ((r = mount_add_swap_links(m)) < 0)
405 if ((r = mount_add_path_links(m)) < 0)
408 if ((r = mount_add_automount_links(m)) < 0)
411 if ((r = mount_add_target_links(m)) < 0)
414 if ((r = unit_add_default_cgroup(u)) < 0)
417 if (m->meta.default_dependencies)
418 if ((r = mount_add_default_dependencies(m)) < 0)
422 return mount_verify(m);
425 static int mount_notify_automount(Mount *m, int status) {
431 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
432 return r == -ENOENT ? 0 : r;
434 return automount_send_ready(AUTOMOUNT(p), status);
437 static void mount_set_state(Mount *m, MountState state) {
438 MountState old_state;
441 old_state = m->state;
444 if (state != MOUNT_MOUNTING &&
445 state != MOUNT_MOUNTING_DONE &&
446 state != MOUNT_REMOUNTING &&
447 state != MOUNT_UNMOUNTING &&
448 state != MOUNT_MOUNTING_SIGTERM &&
449 state != MOUNT_MOUNTING_SIGKILL &&
450 state != MOUNT_UNMOUNTING_SIGTERM &&
451 state != MOUNT_UNMOUNTING_SIGKILL &&
452 state != MOUNT_REMOUNTING_SIGTERM &&
453 state != MOUNT_REMOUNTING_SIGKILL) {
454 unit_unwatch_timer(UNIT(m), &m->timer_watch);
455 mount_unwatch_control_pid(m);
456 m->control_command = NULL;
457 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
460 if (state == MOUNT_MOUNTED ||
461 state == MOUNT_REMOUNTING)
462 mount_notify_automount(m, 0);
463 else if (state == MOUNT_DEAD ||
464 state == MOUNT_UNMOUNTING ||
465 state == MOUNT_MOUNTING_SIGTERM ||
466 state == MOUNT_MOUNTING_SIGKILL ||
467 state == MOUNT_REMOUNTING_SIGTERM ||
468 state == MOUNT_REMOUNTING_SIGKILL ||
469 state == MOUNT_UNMOUNTING_SIGTERM ||
470 state == MOUNT_UNMOUNTING_SIGKILL ||
471 state == MOUNT_MAINTENANCE)
472 mount_notify_automount(m, -ENODEV);
474 if (state != old_state)
475 log_debug("%s changed %s -> %s",
477 mount_state_to_string(old_state),
478 mount_state_to_string(state));
480 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
483 static int mount_coldplug(Unit *u) {
485 MountState new_state = MOUNT_DEAD;
489 assert(m->state == MOUNT_DEAD);
491 if (m->deserialized_state != m->state)
492 new_state = m->deserialized_state;
493 else if (m->from_proc_self_mountinfo)
494 new_state = MOUNT_MOUNTED;
496 if (new_state != m->state) {
498 if (new_state == MOUNT_MOUNTING ||
499 new_state == MOUNT_MOUNTING_DONE ||
500 new_state == MOUNT_REMOUNTING ||
501 new_state == MOUNT_UNMOUNTING ||
502 new_state == MOUNT_MOUNTING_SIGTERM ||
503 new_state == MOUNT_MOUNTING_SIGKILL ||
504 new_state == MOUNT_UNMOUNTING_SIGTERM ||
505 new_state == MOUNT_UNMOUNTING_SIGKILL ||
506 new_state == MOUNT_REMOUNTING_SIGTERM ||
507 new_state == MOUNT_REMOUNTING_SIGKILL) {
509 if (m->control_pid <= 0)
512 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
515 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
519 mount_set_state(m, new_state);
525 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
532 if (m->from_proc_self_mountinfo)
533 p = &m->parameters_proc_self_mountinfo;
534 else if (m->from_fragment)
535 p = &m->parameters_fragment;
537 p = &m->parameters_etc_fstab;
540 "%sMount State: %s\n"
543 "%sFile System Type: %s\n"
545 "%sFrom /etc/fstab: %s\n"
546 "%sFrom /proc/self/mountinfo: %s\n"
547 "%sFrom fragment: %s\n"
548 "%sDirectoryMode: %04o\n",
549 prefix, mount_state_to_string(m->state),
551 prefix, strna(p->what),
552 prefix, strna(p->fstype),
553 prefix, strna(p->options),
554 prefix, yes_no(m->from_etc_fstab),
555 prefix, yes_no(m->from_proc_self_mountinfo),
556 prefix, yes_no(m->from_fragment),
557 prefix, m->directory_mode);
559 if (m->control_pid > 0)
561 "%sControl PID: %lu\n",
562 prefix, (unsigned long) m->control_pid);
564 exec_context_dump(&m->exec_context, f, prefix);
567 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
575 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
578 if ((r = exec_spawn(c,
582 m->meta.manager->environment,
586 m->meta.manager->confirm_spawn,
587 m->meta.cgroup_bondings,
591 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
592 /* FIXME: we need to do something here */
600 unit_unwatch_timer(UNIT(m), &m->timer_watch);
605 static void mount_enter_dead(Mount *m, bool success) {
611 mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD);
614 static void mount_enter_mounted(Mount *m, bool success) {
620 mount_set_state(m, MOUNT_MOUNTED);
623 static void mount_enter_signal(Mount *m, MountState state, bool success) {
632 if (m->exec_context.kill_mode != KILL_NONE) {
633 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
634 state == MOUNT_UNMOUNTING_SIGTERM ||
635 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
637 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
639 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) {
640 if (r != -EAGAIN && r != -ESRCH)
646 if (!sent && m->control_pid > 0)
647 if (kill(m->exec_context.kill_mode == KILL_PROCESS ?
649 -m->control_pid, sig) < 0 && errno != ESRCH) {
657 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
660 mount_set_state(m, state);
661 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
662 mount_enter_mounted(m, true);
664 mount_enter_dead(m, true);
669 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
671 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
672 mount_enter_mounted(m, false);
674 mount_enter_dead(m, false);
677 static void mount_enter_unmounting(Mount *m, bool success) {
685 m->control_command_id = MOUNT_EXEC_UNMOUNT;
686 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
688 if ((r = exec_command_set(
695 mount_unwatch_control_pid(m);
697 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
700 mount_set_state(m, MOUNT_UNMOUNTING);
705 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
706 mount_enter_mounted(m, false);
709 static void mount_enter_mounting(Mount *m) {
714 m->control_command_id = MOUNT_EXEC_MOUNT;
715 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
717 mkdir_p(m->where, m->directory_mode);
719 if (m->from_fragment)
720 r = exec_command_set(
723 m->parameters_fragment.what,
725 "-t", m->parameters_fragment.fstype,
726 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
728 else if (m->from_etc_fstab)
729 r = exec_command_set(
740 mount_unwatch_control_pid(m);
742 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
745 mount_set_state(m, MOUNT_MOUNTING);
750 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
751 mount_enter_dead(m, false);
754 static void mount_enter_mounting_done(Mount *m) {
757 mount_set_state(m, MOUNT_MOUNTING_DONE);
760 static void mount_enter_remounting(Mount *m, bool success) {
768 m->control_command_id = MOUNT_EXEC_REMOUNT;
769 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
771 if (m->from_fragment) {
775 if (m->parameters_fragment.options) {
776 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
785 r = exec_command_set(
788 m->parameters_fragment.what,
790 "-t", m->parameters_fragment.fstype,
795 } else if (m->from_etc_fstab)
796 r = exec_command_set(
810 mount_unwatch_control_pid(m);
812 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
815 mount_set_state(m, MOUNT_REMOUNTING);
820 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
821 mount_enter_mounted(m, false);
824 static int mount_start(Unit *u) {
829 /* We cannot fulfill this request right now, try again later
831 if (m->state == MOUNT_UNMOUNTING ||
832 m->state == MOUNT_UNMOUNTING_SIGTERM ||
833 m->state == MOUNT_UNMOUNTING_SIGKILL)
837 if (m->state == MOUNT_MOUNTING ||
838 m->state == MOUNT_MOUNTING_SIGTERM ||
839 m->state == MOUNT_MOUNTING_SIGKILL)
842 assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE);
845 mount_enter_mounting(m);
849 static int mount_stop(Unit *u) {
855 if (m->state == MOUNT_UNMOUNTING ||
856 m->state == MOUNT_UNMOUNTING_SIGKILL ||
857 m->state == MOUNT_UNMOUNTING_SIGTERM)
860 assert(m->state == MOUNT_MOUNTING ||
861 m->state == MOUNT_MOUNTING_DONE ||
862 m->state == MOUNT_MOUNTED ||
863 m->state == MOUNT_MOUNTING_SIGTERM ||
864 m->state == MOUNT_MOUNTING_SIGKILL ||
865 m->state == MOUNT_REMOUNTING ||
866 m->state == MOUNT_REMOUNTING_SIGTERM ||
867 m->state == MOUNT_REMOUNTING_SIGKILL);
869 mount_enter_unmounting(m, true);
873 static int mount_reload(Unit *u) {
878 if (m->state == MOUNT_MOUNTING_DONE)
881 assert(m->state == MOUNT_MOUNTED);
883 mount_enter_remounting(m, true);
887 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
894 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
895 unit_serialize_item(u, f, "failure", yes_no(m->failure));
897 if (m->control_pid > 0)
898 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
900 if (m->control_command_id >= 0)
901 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
906 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
914 if (streq(key, "state")) {
917 if ((state = mount_state_from_string(value)) < 0)
918 log_debug("Failed to parse state value %s", value);
920 m->deserialized_state = state;
921 } else if (streq(key, "failure")) {
924 if ((b = parse_boolean(value)) < 0)
925 log_debug("Failed to parse failure value %s", value);
927 m->failure = b || m->failure;
929 } else if (streq(key, "control-pid")) {
932 if (parse_pid(value, &pid) < 0)
933 log_debug("Failed to parse control-pid value %s", value);
935 m->control_pid = pid;
936 } else if (streq(key, "control-command")) {
939 if ((id = mount_exec_command_from_string(value)) < 0)
940 log_debug("Failed to parse exec-command value %s", value);
942 m->control_command_id = id;
943 m->control_command = m->exec_command + id;
947 log_debug("Unknown serialization key '%s'", key);
952 static UnitActiveState mount_active_state(Unit *u) {
955 return state_translation_table[MOUNT(u)->state];
958 static const char *mount_sub_state_to_string(Unit *u) {
961 return mount_state_to_string(MOUNT(u)->state);
964 static bool mount_check_gc(Unit *u) {
969 return m->from_etc_fstab || m->from_proc_self_mountinfo;
972 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
979 if (pid != m->control_pid)
984 success = is_clean_exit(code, status);
985 m->failure = m->failure || !success;
987 if (m->control_command) {
988 exec_status_exit(&m->control_command->exec_status, pid, code, status);
989 m->control_command = NULL;
990 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
993 log_full(success ? LOG_DEBUG : LOG_NOTICE,
994 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
996 /* Note that mount(8) returning and the kernel sending us a
997 * mount table change event might happen out-of-order. If an
998 * operation succeed we assume the kernel will follow soon too
999 * and already change into the resulting state. If it fails
1000 * we check if the kernel still knows about the mount. and
1001 * change state accordingly. */
1005 case MOUNT_MOUNTING:
1006 case MOUNT_MOUNTING_DONE:
1007 case MOUNT_MOUNTING_SIGKILL:
1008 case MOUNT_MOUNTING_SIGTERM:
1009 case MOUNT_REMOUNTING:
1010 case MOUNT_REMOUNTING_SIGKILL:
1011 case MOUNT_REMOUNTING_SIGTERM:
1014 mount_enter_mounted(m, true);
1015 else if (m->from_proc_self_mountinfo)
1016 mount_enter_mounted(m, false);
1018 mount_enter_dead(m, false);
1021 case MOUNT_UNMOUNTING:
1022 case MOUNT_UNMOUNTING_SIGKILL:
1023 case MOUNT_UNMOUNTING_SIGTERM:
1026 mount_enter_dead(m, true);
1027 else if (m->from_proc_self_mountinfo)
1028 mount_enter_mounted(m, false);
1030 mount_enter_dead(m, false);
1034 assert_not_reached("Uh, control process died at wrong time.");
1037 /* Notify clients about changed exit status */
1038 unit_add_to_dbus_queue(u);
1041 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1042 Mount *m = MOUNT(u);
1045 assert(elapsed == 1);
1046 assert(w == &m->timer_watch);
1050 case MOUNT_MOUNTING:
1051 case MOUNT_MOUNTING_DONE:
1052 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1053 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1056 case MOUNT_REMOUNTING:
1057 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1058 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1061 case MOUNT_UNMOUNTING:
1062 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1063 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1066 case MOUNT_MOUNTING_SIGTERM:
1067 log_warning("%s mounting timed out. Killing.", u->meta.id);
1068 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1071 case MOUNT_REMOUNTING_SIGTERM:
1072 log_warning("%s remounting timed out. Killing.", u->meta.id);
1073 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1076 case MOUNT_UNMOUNTING_SIGTERM:
1077 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1078 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1081 case MOUNT_MOUNTING_SIGKILL:
1082 case MOUNT_REMOUNTING_SIGKILL:
1083 case MOUNT_UNMOUNTING_SIGKILL:
1084 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1086 if (m->from_proc_self_mountinfo)
1087 mount_enter_mounted(m, false);
1089 mount_enter_dead(m, false);
1093 assert_not_reached("Timeout at wrong time.");
1097 static int mount_add_one(
1101 const char *options,
1103 bool from_proc_self_mountinfo,
1108 char *e, *w = NULL, *o = NULL, *f = NULL;
1117 assert(!set_flags || from_proc_self_mountinfo);
1119 /* Ignore API mount points. They should never be referenced in
1120 * dependencies ever. */
1121 if (mount_point_is_api(where))
1124 if (streq(fstype, "autofs"))
1127 /* probably some kind of swap, ignore */
1128 if (!is_path(where))
1131 if (!(e = unit_name_from_path(where, ".mount")))
1134 if (!(u = manager_get_unit(m, e))) {
1137 if (!(u = unit_new(m))) {
1142 r = unit_add_name(u, e);
1148 if (!(MOUNT(u)->where = strdup(where))) {
1153 unit_add_to_load_queue(u);
1159 if (!(w = strdup(what)) ||
1160 !(o = strdup(options)) ||
1161 !(f = strdup(fstype))) {
1166 if (from_proc_self_mountinfo) {
1167 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1170 MOUNT(u)->is_mounted = true;
1171 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1172 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1175 MOUNT(u)->from_proc_self_mountinfo = true;
1177 p = &MOUNT(u)->parameters_etc_fstab;
1178 MOUNT(u)->from_etc_fstab = true;
1190 unit_add_to_dbus_queue(u);
1205 static char *fstab_node_to_udev_node(char *p) {
1209 /* FIXME: to follow udev's logic 100% we need to leave valid
1210 * UTF8 chars unescaped */
1212 if (startswith(p, "LABEL=")) {
1214 if (!(u = unquote(p+6, '"')))
1217 t = xescape(u, "/ ");
1223 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1232 if (startswith(p, "UUID=")) {
1234 if (!(u = unquote(p+5, '"')))
1237 t = xescape(u, "/ ");
1243 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1255 static int mount_find_pri(char *options) {
1259 if (!(pri = mount_test_option(options, "pri=")))
1265 r = strtoul(pri, &end, 10);
1270 if (end == pri || (*end != ',' && *end != 0))
1276 static int mount_load_etc_fstab(Manager *m) {
1284 if (!(f = setmntent("/etc/fstab", "r")))
1287 while ((me = getmntent(f))) {
1290 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1295 if (!(where = strdup(me->mnt_dir))) {
1302 path_kill_slashes(what);
1304 if (where[0] == '/')
1305 path_kill_slashes(where);
1307 if (streq(me->mnt_type, "swap")) {
1310 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1316 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1317 !!mount_test_option(me->mnt_opts, "nofail"),
1318 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1321 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1337 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1339 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1343 rewind(m->proc_self_mountinfo);
1348 device = path = options = options2 = fstype = d = p = o = NULL;
1350 if ((k = fscanf(m->proc_self_mountinfo,
1351 "%*s " /* (1) mount id */
1352 "%*s " /* (2) parent id */
1353 "%*s " /* (3) major:minor */
1354 "%*s " /* (4) root */
1355 "%ms " /* (5) mount point */
1356 "%ms" /* (6) mount options */
1357 "%*[^-]" /* (7) optional fields */
1358 "- " /* (8) seperator */
1359 "%ms " /* (9) file system type */
1360 "%ms" /* (10) mount source */
1361 "%ms" /* (11) mount options 2 */
1362 "%*[^\n]", /* some rubbish at the end */
1376 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1381 if (!(d = cunescape(device)) ||
1382 !(p = cunescape(path))) {
1387 if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0)
1415 static void mount_shutdown(Manager *m) {
1418 if (m->proc_self_mountinfo) {
1419 fclose(m->proc_self_mountinfo);
1420 m->proc_self_mountinfo = NULL;
1424 static int mount_enumerate(Manager *m) {
1426 struct epoll_event ev;
1429 if (!m->proc_self_mountinfo) {
1430 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1433 m->mount_watch.type = WATCH_MOUNT;
1434 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1437 ev.events = EPOLLERR;
1438 ev.data.ptr = &m->mount_watch;
1440 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1444 if ((r = mount_load_etc_fstab(m)) < 0)
1447 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1457 void mount_fd_event(Manager *m, int events) {
1462 assert(events == EPOLLERR);
1464 /* The manager calls this for every fd event happening on the
1465 * /proc/self/mountinfo file, which informs us about mounting
1468 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1469 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1471 /* Reset flags, just in case, for later calls */
1472 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1473 Mount *mount = (Mount*) meta;
1475 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1481 manager_dispatch_load_queue(m);
1483 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1484 Mount *mount = (Mount*) meta;
1486 if (!mount->is_mounted) {
1487 /* This has just been unmounted. */
1489 mount->from_proc_self_mountinfo = false;
1491 switch (mount->state) {
1494 mount_enter_dead(mount, true);
1498 mount_set_state(mount, mount->state);
1503 } else if (mount->just_mounted || mount->just_changed) {
1505 /* New or changed entrymount */
1507 switch (mount->state) {
1510 case MOUNT_MAINTENANCE:
1511 mount_enter_mounted(mount, true);
1514 case MOUNT_MOUNTING:
1515 mount_enter_mounting_done(mount);
1519 /* Nothing really changed, but let's
1520 * issue an notification call
1521 * nonetheless, in case somebody is
1522 * waiting for this. (e.g. file system
1523 * ro/rw remounts.) */
1524 mount_set_state(mount, mount->state);
1529 /* Reset the flags for later calls */
1530 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1534 static void mount_reset_maintenance(Unit *u) {
1535 Mount *m = MOUNT(u);
1539 if (m->state == MOUNT_MAINTENANCE)
1540 mount_set_state(m, MOUNT_DEAD);
1545 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1546 [MOUNT_DEAD] = "dead",
1547 [MOUNT_MOUNTING] = "mounting",
1548 [MOUNT_MOUNTING_DONE] = "mounting-done",
1549 [MOUNT_MOUNTED] = "mounted",
1550 [MOUNT_REMOUNTING] = "remounting",
1551 [MOUNT_UNMOUNTING] = "unmounting",
1552 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1553 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1554 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1555 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1556 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1557 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1558 [MOUNT_MAINTENANCE] = "maintenance"
1561 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1563 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1564 [MOUNT_EXEC_MOUNT] = "ExecMount",
1565 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1566 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1569 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1571 const UnitVTable mount_vtable = {
1575 .no_instances = true,
1577 .show_status = true,
1583 .coldplug = mount_coldplug,
1587 .start = mount_start,
1589 .reload = mount_reload,
1591 .serialize = mount_serialize,
1592 .deserialize_item = mount_deserialize_item,
1594 .active_state = mount_active_state,
1595 .sub_state_to_string = mount_sub_state_to_string,
1597 .check_gc = mount_check_gc,
1599 .sigchld_event = mount_sigchld_event,
1600 .timer_event = mount_timer_event,
1602 .reset_maintenance = mount_reset_maintenance,
1604 .bus_interface = "org.freedesktop.systemd1.Mount",
1605 .bus_message_handler = bus_mount_message_handler,
1606 .bus_invalidating_properties = bus_mount_invalidating_properties,
1608 .enumerate = mount_enumerate,
1609 .shutdown = mount_shutdown