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 int mount_add_node_links(Unit *u, const char *what) {
124 /* We observe kernel mounts only while they are live,
125 * hence don't create any links for them */
128 /* Adds in links to the device that this node is based on */
130 if (!path_startswith(what, "/dev/"))
133 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
136 r = manager_load_unit(u->meta.manager, e, NULL, &device);
142 if ((r = unit_add_dependency(u, UNIT_AFTER, device, true)) < 0)
145 if ((r = unit_add_dependency(u, UNIT_REQUIRES, device, true)) < 0)
148 if (u->meta.manager->running_as == MANAGER_INIT ||
149 u->meta.manager->running_as == MANAGER_SYSTEM)
150 if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0)
156 int mount_add_path_links(Unit *u, const char *where, bool requires) {
162 /* Adds in link to other mount points, that might lie below or
163 * above us in the hierarchy */
165 LIST_FOREACH(units_per_type, other, u->meta.manager->units_per_type[UNIT_MOUNT]) {
173 if (u->meta.load_state != UNIT_LOADED)
176 if (path_startswith(where, n->where)) {
178 if ((r = unit_add_dependency(u, UNIT_AFTER, UNIT(other), true)) < 0)
182 if ((r = unit_add_dependency(u, UNIT_REQUIRES, UNIT(other), true)) < 0)
185 } else if (path_startswith(n->where, where)) {
187 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(other), true)) < 0)
191 if ((r = unit_add_dependency(UNIT(other), UNIT_REQUIRES, u, true)) < 0)
199 static char* mount_test_option(const char *haystack, const char *needle) {
204 /* Like glibc's hasmntopt(), but works on a string, not a
211 me.mnt_opts = (char*) haystack;
213 return hasmntopt(&me, needle);
216 static int mount_add_target_links(Mount *m) {
221 bool noauto, handle, automount;
225 if (m->from_fragment)
226 p = &m->parameters_fragment;
227 else if (m->from_etc_fstab)
228 p = &m->parameters_etc_fstab;
232 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
233 handle = !!mount_test_option(p->options, "comment=systemd.mount");
234 automount = !!mount_test_option(p->options, "comment=systemd.automount");
236 if (noauto && !handle && !automount)
239 if (mount_test_option(p->options, "_netdev") ||
240 fstype_is_network(p->fstype))
241 target = SPECIAL_REMOTE_FS_TARGET;
243 target = SPECIAL_LOCAL_FS_TARGET;
245 if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0)
251 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
254 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(am), true)) < 0)
257 return unit_add_dependency(UNIT(am), UNIT_BEFORE, tu, true);
262 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
265 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
269 static int mount_verify(Mount *m) {
274 if (UNIT(m)->meta.load_state != UNIT_LOADED)
277 if (!(e = unit_name_from_path(m->where, ".mount")))
280 b = unit_has_name(UNIT(m), e);
284 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
291 static int mount_load(Unit *u) {
296 assert(u->meta.load_state == UNIT_STUB);
298 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
301 /* This is a new unit? Then let's add in some extras */
302 if (u->meta.load_state == UNIT_LOADED) {
303 const char *what = m->parameters_fragment.what;
305 what = m->parameters_etc_fstab.what;
308 if (!(m->where = unit_name_to_path(u->meta.id)))
311 path_kill_slashes(m->where);
313 /* Minor validity checking */
314 if ((m->parameters_fragment.options || m->parameters_fragment.fstype) && !m->parameters_fragment.what)
317 if (m->parameters_fragment.what)
318 m->from_fragment = true;
320 if ((r = mount_add_node_links(u, what)) < 0)
323 if ((r = mount_add_path_links(u, m->where, m->from_etc_fstab || m->from_fragment)) < 0)
326 if ((r = mount_add_target_links(MOUNT(u))) < 0)
329 if ((r = unit_add_default_cgroup(u)) < 0)
333 return mount_verify(m);
336 static int mount_notify_automount(Mount *m, int status) {
342 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
343 return r == -ENOENT ? 0 : r;
345 return automount_send_ready(AUTOMOUNT(p), status);
348 static void mount_set_state(Mount *m, MountState state) {
349 MountState old_state;
352 old_state = m->state;
355 if (state != MOUNT_MOUNTING &&
356 state != MOUNT_MOUNTING_DONE &&
357 state != MOUNT_REMOUNTING &&
358 state != MOUNT_UNMOUNTING &&
359 state != MOUNT_MOUNTING_SIGTERM &&
360 state != MOUNT_MOUNTING_SIGKILL &&
361 state != MOUNT_UNMOUNTING_SIGTERM &&
362 state != MOUNT_UNMOUNTING_SIGKILL &&
363 state != MOUNT_REMOUNTING_SIGTERM &&
364 state != MOUNT_REMOUNTING_SIGKILL) {
365 unit_unwatch_timer(UNIT(m), &m->timer_watch);
366 mount_unwatch_control_pid(m);
367 m->control_command = NULL;
368 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
371 if (state == MOUNT_MOUNTED ||
372 state == MOUNT_REMOUNTING)
373 mount_notify_automount(m, 0);
374 else if (state == MOUNT_DEAD ||
375 state == MOUNT_UNMOUNTING ||
376 state == MOUNT_MOUNTING_SIGTERM ||
377 state == MOUNT_MOUNTING_SIGKILL ||
378 state == MOUNT_REMOUNTING_SIGTERM ||
379 state == MOUNT_REMOUNTING_SIGKILL ||
380 state == MOUNT_UNMOUNTING_SIGTERM ||
381 state == MOUNT_UNMOUNTING_SIGKILL ||
382 state == MOUNT_MAINTAINANCE)
383 mount_notify_automount(m, -ENODEV);
385 if (state != old_state)
386 log_debug("%s changed %s -> %s",
388 mount_state_to_string(old_state),
389 mount_state_to_string(state));
391 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
394 static int mount_coldplug(Unit *u) {
396 MountState new_state = MOUNT_DEAD;
400 assert(m->state == MOUNT_DEAD);
402 if (m->deserialized_state != m->state)
403 new_state = m->deserialized_state;
404 else if (m->from_proc_self_mountinfo)
405 new_state = MOUNT_MOUNTED;
407 if (new_state != m->state) {
409 if (new_state == MOUNT_MOUNTING ||
410 new_state == MOUNT_MOUNTING_DONE ||
411 new_state == MOUNT_REMOUNTING ||
412 new_state == MOUNT_UNMOUNTING ||
413 new_state == MOUNT_MOUNTING_SIGTERM ||
414 new_state == MOUNT_MOUNTING_SIGKILL ||
415 new_state == MOUNT_UNMOUNTING_SIGTERM ||
416 new_state == MOUNT_UNMOUNTING_SIGKILL ||
417 new_state == MOUNT_REMOUNTING_SIGTERM ||
418 new_state == MOUNT_REMOUNTING_SIGKILL) {
420 if (m->control_pid <= 0)
423 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
426 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
430 mount_set_state(m, new_state);
436 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
443 if (m->from_proc_self_mountinfo)
444 p = &m->parameters_proc_self_mountinfo;
445 else if (m->from_fragment)
446 p = &m->parameters_fragment;
448 p = &m->parameters_etc_fstab;
451 "%sMount State: %s\n"
454 "%sFile System Type: %s\n"
456 "%sFrom /etc/fstab: %s\n"
457 "%sFrom /proc/self/mountinfo: %s\n"
458 "%sFrom fragment: %s\n"
460 prefix, mount_state_to_string(m->state),
462 prefix, strna(p->what),
463 prefix, strna(p->fstype),
464 prefix, strna(p->options),
465 prefix, yes_no(m->from_etc_fstab),
466 prefix, yes_no(m->from_proc_self_mountinfo),
467 prefix, yes_no(m->from_fragment),
468 prefix, kill_mode_to_string(m->kill_mode));
470 if (m->control_pid > 0)
472 "%sControl PID: %llu\n",
473 prefix, (unsigned long long) m->control_pid);
475 exec_context_dump(&m->exec_context, f, prefix);
478 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
486 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
489 if ((r = exec_spawn(c,
495 UNIT(m)->meta.manager->confirm_spawn,
496 UNIT(m)->meta.cgroup_bondings,
500 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
501 /* FIXME: we need to do something here */
509 unit_unwatch_timer(UNIT(m), &m->timer_watch);
514 static void mount_enter_dead(Mount *m, bool success) {
520 mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
523 static void mount_enter_mounted(Mount *m, bool success) {
529 mount_set_state(m, MOUNT_MOUNTED);
532 static void mount_enter_signal(Mount *m, MountState state, bool success) {
541 if (m->kill_mode != KILL_NONE) {
542 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
543 state == MOUNT_UNMOUNTING_SIGTERM ||
544 state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
546 if (m->kill_mode == KILL_CONTROL_GROUP) {
548 if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
549 if (r != -EAGAIN && r != -ESRCH)
555 if (!sent && m->control_pid > 0)
556 if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
563 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
566 mount_set_state(m, state);
567 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
568 mount_enter_mounted(m, true);
570 mount_enter_dead(m, true);
575 log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
577 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
578 mount_enter_mounted(m, false);
580 mount_enter_dead(m, false);
583 static void mount_enter_unmounting(Mount *m, bool success) {
591 m->control_command_id = MOUNT_EXEC_UNMOUNT;
592 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
594 if ((r = exec_command_set(
601 mount_unwatch_control_pid(m);
603 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
606 mount_set_state(m, MOUNT_UNMOUNTING);
611 log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
612 mount_enter_mounted(m, false);
615 static void mount_enter_mounting(Mount *m) {
620 m->control_command_id = MOUNT_EXEC_MOUNT;
621 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
623 if (m->from_fragment)
624 r = exec_command_set(
627 m->parameters_fragment.what,
629 "-t", m->parameters_fragment.fstype,
630 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
632 else if (m->from_etc_fstab)
633 r = exec_command_set(
644 mount_unwatch_control_pid(m);
646 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
649 mount_set_state(m, MOUNT_MOUNTING);
654 log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
655 mount_enter_dead(m, false);
658 static void mount_enter_mounting_done(Mount *m) {
661 mount_set_state(m, MOUNT_MOUNTING_DONE);
664 static void mount_enter_remounting(Mount *m, bool success) {
672 m->control_command_id = MOUNT_EXEC_REMOUNT;
673 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
675 if (m->from_fragment) {
679 if (m->parameters_fragment.options) {
680 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
689 r = exec_command_set(
692 m->parameters_fragment.what,
694 "-t", m->parameters_fragment.fstype,
699 } else if (m->from_etc_fstab)
700 r = exec_command_set(
714 mount_unwatch_control_pid(m);
716 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
719 mount_set_state(m, MOUNT_REMOUNTING);
724 mount_enter_mounted(m, false);
727 static int mount_start(Unit *u) {
732 /* We cannot fulfill this request right now, try again later
734 if (m->state == MOUNT_UNMOUNTING ||
735 m->state == MOUNT_UNMOUNTING_SIGTERM ||
736 m->state == MOUNT_UNMOUNTING_SIGKILL)
740 if (m->state == MOUNT_MOUNTING ||
741 m->state == MOUNT_MOUNTING_SIGTERM ||
742 m->state == MOUNT_MOUNTING_SIGKILL)
745 assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
748 mount_enter_mounting(m);
752 static int mount_stop(Unit *u) {
757 /* Cann't do this right now. */
758 if (m->state == MOUNT_MOUNTING ||
759 m->state == MOUNT_MOUNTING_DONE ||
760 m->state == MOUNT_MOUNTING_SIGTERM ||
761 m->state == MOUNT_MOUNTING_SIGKILL ||
762 m->state == MOUNT_REMOUNTING ||
763 m->state == MOUNT_REMOUNTING_SIGTERM ||
764 m->state == MOUNT_REMOUNTING_SIGKILL)
768 if (m->state == MOUNT_UNMOUNTING ||
769 m->state == MOUNT_UNMOUNTING_SIGKILL ||
770 m->state == MOUNT_UNMOUNTING_SIGTERM)
773 assert(m->state == MOUNT_MOUNTED);
775 mount_enter_unmounting(m, true);
779 static int mount_reload(Unit *u) {
784 if (m->state == MOUNT_MOUNTING_DONE)
787 assert(m->state == MOUNT_MOUNTED);
789 mount_enter_remounting(m, true);
793 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
800 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
801 unit_serialize_item(u, f, "failure", yes_no(m->failure));
803 if (m->control_pid > 0)
804 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) m->control_pid);
806 if (m->control_command_id >= 0)
807 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
812 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
821 if (streq(key, "state")) {
824 if ((state = mount_state_from_string(value)) < 0)
825 log_debug("Failed to parse state value %s", value);
827 m->deserialized_state = state;
828 } else if (streq(key, "failure")) {
831 if ((b = parse_boolean(value)) < 0)
832 log_debug("Failed to parse failure value %s", value);
834 m->failure = b || m->failure;
836 } else if (streq(key, "control-pid")) {
839 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
840 log_debug("Failed to parse control-pid value %s", value);
842 m->control_pid = (pid_t) pid;
843 } else if (streq(key, "control-command")) {
846 if ((id = mount_exec_command_from_string(value)) < 0)
847 log_debug("Failed to parse exec-command value %s", value);
849 m->control_command_id = id;
850 m->control_command = m->exec_command + id;
854 log_debug("Unknown serialization key '%s'", key);
859 static UnitActiveState mount_active_state(Unit *u) {
862 return state_translation_table[MOUNT(u)->state];
865 static const char *mount_sub_state_to_string(Unit *u) {
868 return mount_state_to_string(MOUNT(u)->state);
871 static bool mount_check_gc(Unit *u) {
876 return m->from_etc_fstab || m->from_proc_self_mountinfo;
879 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
886 success = code == CLD_EXITED && status == 0;
887 m->failure = m->failure || !success;
889 assert(m->control_pid == pid);
892 if (m->control_command) {
893 exec_status_fill(&m->control_command->exec_status, pid, code, status);
894 m->control_command = NULL;
895 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
898 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
900 /* Note that mount(8) returning and the kernel sending us a
901 * mount table change event might happen out-of-order. If an
902 * operation succeed we assume the kernel will follow soon too
903 * and already change into the resulting state. If it fails
904 * we check if the kernel still knows about the mount. and
905 * change state accordingly. */
910 case MOUNT_MOUNTING_DONE:
911 case MOUNT_MOUNTING_SIGKILL:
912 case MOUNT_MOUNTING_SIGTERM:
913 case MOUNT_REMOUNTING:
914 case MOUNT_REMOUNTING_SIGKILL:
915 case MOUNT_REMOUNTING_SIGTERM:
917 if (success && m->from_proc_self_mountinfo)
918 mount_enter_mounted(m, true);
919 else if (m->from_proc_self_mountinfo)
920 mount_enter_mounted(m, false);
922 mount_enter_dead(m, false);
925 case MOUNT_UNMOUNTING:
926 case MOUNT_UNMOUNTING_SIGKILL:
927 case MOUNT_UNMOUNTING_SIGTERM:
930 mount_enter_dead(m, true);
931 else if (m->from_proc_self_mountinfo)
932 mount_enter_mounted(m, false);
934 mount_enter_dead(m, false);
938 assert_not_reached("Uh, control process died at wrong time.");
942 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
946 assert(elapsed == 1);
947 assert(w == &m->timer_watch);
952 case MOUNT_MOUNTING_DONE:
953 log_warning("%s mounting timed out. Stopping.", u->meta.id);
954 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
957 case MOUNT_REMOUNTING:
958 log_warning("%s remounting timed out. Stopping.", u->meta.id);
959 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
962 case MOUNT_UNMOUNTING:
963 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
964 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
967 case MOUNT_MOUNTING_SIGTERM:
968 log_warning("%s mounting timed out. Killing.", u->meta.id);
969 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
972 case MOUNT_REMOUNTING_SIGTERM:
973 log_warning("%s remounting timed out. Killing.", u->meta.id);
974 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
977 case MOUNT_UNMOUNTING_SIGTERM:
978 log_warning("%s unmounting timed out. Killing.", u->meta.id);
979 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
982 case MOUNT_MOUNTING_SIGKILL:
983 case MOUNT_REMOUNTING_SIGKILL:
984 case MOUNT_UNMOUNTING_SIGKILL:
985 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
987 if (m->from_proc_self_mountinfo)
988 mount_enter_mounted(m, false);
990 mount_enter_dead(m, false);
994 assert_not_reached("Timeout at wrong time.");
998 static int mount_add_one(
1002 const char *options,
1004 bool from_proc_self_mountinfo,
1009 char *e, *w = NULL, *o = NULL, *f = NULL;
1010 MountParameters *mp;
1018 assert(!set_flags || from_proc_self_mountinfo);
1020 /* Ignore API mount points. They should never be referenced in
1021 * dependencies ever. */
1022 if (mount_point_is_api(where))
1025 if (streq(fstype, "autofs"))
1028 /* probably some kind of swap, which we don't cover for now */
1029 if (where[0] != '/')
1032 if (!(e = unit_name_from_path(where, ".mount")))
1035 if (!(u = manager_get_unit(m, e))) {
1038 if (!(u = unit_new(m))) {
1043 r = unit_add_name(u, e);
1049 if (!(MOUNT(u)->where = strdup(where))) {
1054 if ((r = unit_set_description(u, where)) < 0)
1057 unit_add_to_load_queue(u);
1063 if (!(w = strdup(what)) ||
1064 !(o = strdup(options)) ||
1065 !(f = strdup(fstype))) {
1070 if (from_proc_self_mountinfo) {
1071 mp = &MOUNT(u)->parameters_proc_self_mountinfo;
1074 MOUNT(u)->is_mounted = true;
1075 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1076 MOUNT(u)->just_changed = !streq_ptr(MOUNT(u)->parameters_proc_self_mountinfo.options, o);
1079 MOUNT(u)->from_proc_self_mountinfo = true;
1082 mp = &MOUNT(u)->parameters_etc_fstab;
1084 MOUNT(u)->from_etc_fstab = true;
1096 unit_add_to_dbus_queue(u);
1111 static char *fstab_node_to_udev_node(char *p) {
1115 /* FIXME: to follow udev's logic 100% we need to leave valid
1116 * UTF8 chars unescaped */
1118 if (startswith(p, "LABEL=")) {
1120 if (!(t = xescape(p+6, "/ ")))
1123 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1132 if (startswith(p, "UUID=")) {
1134 if (!(t = xescape(p+5, "/ ")))
1137 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1149 static int mount_find_pri(char *options) {
1153 if (!(pri = mount_test_option(options, "pri=")))
1159 r = strtoul(pri, &end, 10);
1164 if (end == pri || (*end != ',' && *end != 0))
1170 static int mount_load_etc_fstab(Manager *m) {
1178 if (!(f = setmntent("/etc/fstab", "r")))
1181 while ((me = getmntent(f))) {
1184 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1189 if (!(where = strdup(me->mnt_dir))) {
1196 path_kill_slashes(what);
1198 if (where[0] == '/')
1199 path_kill_slashes(where);
1201 if (streq(me->mnt_type, "swap")) {
1204 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1209 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1213 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1229 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1231 char *device, *path, *options, *fstype, *d, *p;
1235 rewind(m->proc_self_mountinfo);
1240 device = path = options = fstype = d = p = NULL;
1242 if ((k = fscanf(m->proc_self_mountinfo,
1243 "%*s " /* (1) mount id */
1244 "%*s " /* (2) parent id */
1245 "%*s " /* (3) major:minor */
1246 "%*s " /* (4) root */
1247 "%ms " /* (5) mount point */
1248 "%ms" /* (6) mount options */
1249 "%*[^-]" /* (7) optional fields */
1250 "- " /* (8) seperator */
1251 "%ms " /* (9) file system type */
1252 "%ms" /* (10) mount source */
1253 "%*[^\n]", /* some rubbish at the end */
1266 if (!(d = cunescape(device)) ||
1267 !(p = cunescape(path))) {
1272 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1296 static void mount_shutdown(Manager *m) {
1299 if (m->proc_self_mountinfo) {
1300 fclose(m->proc_self_mountinfo);
1301 m->proc_self_mountinfo = NULL;
1305 static int mount_enumerate(Manager *m) {
1307 struct epoll_event ev;
1310 if (!m->proc_self_mountinfo) {
1311 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1314 m->mount_watch.type = WATCH_MOUNT;
1315 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1318 ev.events = EPOLLERR;
1319 ev.data.ptr = &m->mount_watch;
1321 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1325 if ((r = mount_load_etc_fstab(m)) < 0)
1328 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1338 void mount_fd_event(Manager *m, int events) {
1343 assert(events == EPOLLERR);
1345 /* The manager calls this for every fd event happening on the
1346 * /proc/self/mountinfo file, which informs us about mounting
1349 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1350 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno));
1352 /* Reset flags, just in case, for later calls */
1353 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1354 Mount *mount = (Mount*) meta;
1356 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1362 manager_dispatch_load_queue(m);
1364 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1365 Mount *mount = (Mount*) meta;
1367 if (!mount->is_mounted) {
1368 /* This has just been unmounted. */
1370 mount->from_proc_self_mountinfo = false;
1372 switch (mount->state) {
1375 mount_enter_dead(mount, true);
1379 mount_set_state(mount, mount->state);
1384 } else if (mount->just_mounted || mount->just_changed) {
1386 /* New or changed entrymount */
1388 switch (mount->state) {
1391 case MOUNT_MAINTAINANCE:
1392 mount_enter_mounted(mount, true);
1395 case MOUNT_MOUNTING:
1396 mount_enter_mounting_done(mount);
1400 /* Nothing really changed, but let's
1401 * issue an notification call
1402 * nonetheless, in case somebody is
1403 * waiting for this. (e.g. file system
1404 * ro/rw remounts.) */
1405 mount_set_state(mount, mount->state);
1410 /* Reset the flags for later calls */
1411 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1415 int mount_path_is_mounted(Manager *m, const char* path) {
1425 if (!(t = strdup(path)))
1428 path_kill_slashes(t);
1434 if (!(e = unit_name_from_path(t, ".mount"))) {
1439 u = manager_get_unit(m, e);
1443 (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1444 MOUNT(u)->state != MOUNT_MOUNTED) {
1449 assert_se(slash = strrchr(t, '/'));
1466 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1467 [MOUNT_DEAD] = "dead",
1468 [MOUNT_MOUNTING] = "mounting",
1469 [MOUNT_MOUNTING_DONE] = "mounting-done",
1470 [MOUNT_MOUNTED] = "mounted",
1471 [MOUNT_REMOUNTING] = "remounting",
1472 [MOUNT_UNMOUNTING] = "unmounting",
1473 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1474 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1475 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1476 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1477 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1478 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1479 [MOUNT_MAINTAINANCE] = "maintainance"
1482 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1484 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1485 [MOUNT_EXEC_MOUNT] = "ExecMount",
1486 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1487 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1490 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1492 const UnitVTable mount_vtable = {
1496 .no_instances = true,
1503 .coldplug = mount_coldplug,
1507 .start = mount_start,
1509 .reload = mount_reload,
1511 .serialize = mount_serialize,
1512 .deserialize_item = mount_deserialize_item,
1514 .active_state = mount_active_state,
1515 .sub_state_to_string = mount_sub_state_to_string,
1517 .check_gc = mount_check_gc,
1519 .sigchld_event = mount_sigchld_event,
1520 .timer_event = mount_timer_event,
1522 .bus_message_handler = bus_mount_message_handler,
1524 .enumerate = mount_enumerate,
1525 .shutdown = mount_shutdown