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 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
38 [MOUNT_DEAD] = UNIT_INACTIVE,
39 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
40 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
41 [MOUNT_MOUNTED] = UNIT_ACTIVE,
42 [MOUNT_REMOUNTING] = UNIT_ACTIVE_RELOADING,
43 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
44 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
45 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
46 [MOUNT_REMOUNTING_SIGTERM] = UNIT_ACTIVE_RELOADING,
47 [MOUNT_REMOUNTING_SIGKILL] = UNIT_ACTIVE_RELOADING,
48 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
49 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
50 [MOUNT_MAINTAINANCE] = UNIT_INACTIVE,
53 static const char* const state_string_table[_MOUNT_STATE_MAX] = {
54 [MOUNT_DEAD] = "dead",
55 [MOUNT_MOUNTING] = "mounting",
56 [MOUNT_MOUNTING_DONE] = "mounting-done",
57 [MOUNT_MOUNTED] = "mounted",
58 [MOUNT_REMOUNTING] = "remounting",
59 [MOUNT_UNMOUNTING] = "unmounting",
60 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
61 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
62 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
63 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
64 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
65 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
66 [MOUNT_MAINTAINANCE] = "maintainance"
69 static char *mount_name_from_where(const char *where) {
72 if (streq(where, "/"))
73 return strdup("-.mount");
75 return unit_name_build_escape(where+1, NULL, ".mount");
78 static void service_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 service_unwatch_control_pid(m);
116 unit_unwatch_timer(u, &m->timer_watch);
119 static void mount_init(Unit *u) {
123 assert(u->meta.load_state == UNIT_STUB);
125 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
126 exec_context_init(&m->exec_context);
128 /* We need to make sure that /bin/mount is always called in
129 * the same process group as us, so that the autofs kernel
130 * side doesn't send us another mount request while we are
131 * already trying to comply its last one. */
132 m->exec_context.no_setsid = true;
134 m->timer_watch.type = WATCH_INVALID;
137 static int mount_notify_automount(Mount *m, int status) {
143 if (!(k = unit_name_change_suffix(UNIT(m)->meta.id, ".automount")))
146 p = manager_get_unit(UNIT(m)->meta.manager, k);
152 return automount_send_ready(AUTOMOUNT(p), status);
155 static int mount_add_node_links(Mount *m) {
163 /* Adds in links to the device that this node is based on */
165 if (m->parameters_fragment.what)
166 what = m->parameters_fragment.what;
167 else if (m->parameters_etc_fstab.what)
168 what = m->parameters_etc_fstab.what;
170 /* We observe kernel mounts only while they are live,
171 * hence don't create any links for them */
174 if (!path_startswith(what, "/dev/"))
177 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
180 r = manager_load_unit(UNIT(m)->meta.manager, e, NULL, &device);
186 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, device)) < 0)
189 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, device)) < 0)
192 if (UNIT(m)->meta.manager->running_as == MANAGER_INIT ||
193 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)
194 if ((r = unit_add_dependency(device, UNIT_WANTS, UNIT(m))) < 0)
200 static int mount_add_path_links(Mount *m) {
206 /* Adds in link to other mount points, that might lie below or
207 * above us in the hierarchy */
209 LIST_FOREACH(units_per_type, other, UNIT(m)->meta.manager->units_per_type[UNIT_MOUNT]) {
217 if (m->meta.load_state != UNIT_LOADED)
220 if (path_startswith(m->where, n->where)) {
222 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(other))) < 0)
225 if (n->from_etc_fstab || n->from_fragment)
226 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(other))) < 0)
229 } else if (path_startswith(n->where, m->where)) {
231 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(other))) < 0)
234 if (m->from_etc_fstab || m->from_fragment)
235 if ((r = unit_add_dependency(UNIT(other), UNIT_REQUIRES, UNIT(m))) < 0)
243 static bool mount_test_option(const char *haystack, const char *needle) {
248 /* Like glibc's hasmntopt(), but works on a string, not a
255 me.mnt_opts = (char*) haystack;
257 return !!hasmntopt(&me, needle);
260 static int mount_add_target_links(Mount *m) {
270 if (m->from_fragment)
271 p = &m->parameters_fragment;
272 else if (m->from_etc_fstab)
273 p = &m->parameters_etc_fstab;
277 noauto = mount_test_option(p->options, MNTOPT_NOAUTO);
278 handle = mount_test_option(p->options, "comment=systemd.mount");
280 if (noauto && !handle)
283 if (mount_test_option(p->options, "_netdev") ||
284 fstype_is_network(p->fstype))
285 target = SPECIAL_REMOTE_FS_TARGET;
287 target = SPECIAL_LOCAL_FS_TARGET;
289 if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &u)) < 0)
293 if ((r = unit_add_dependency(u, UNIT_WANTS, UNIT(m))) < 0)
296 return unit_add_dependency(UNIT(m), UNIT_BEFORE, u);
299 static int mount_verify(Mount *m) {
304 if (UNIT(m)->meta.load_state != UNIT_LOADED)
308 log_error("%s lacks Where setting. Refusing.", UNIT(m)->meta.id);
312 path_kill_slashes(m->where);
314 if (!(e = mount_name_from_where(m->where)))
317 b = unit_has_name(UNIT(m), e);
321 log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
328 static int mount_load(Unit *u) {
333 assert(u->meta.load_state == UNIT_STUB);
335 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
338 /* This is a new unit? Then let's add in some extras */
339 if (u->meta.load_state == UNIT_LOADED) {
341 /* Minor validity checking */
342 if ((m->parameters_fragment.options || m->parameters_fragment.fstype) && !m->parameters_fragment.what)
345 if (m->parameters_fragment.what)
346 m->from_fragment = true;
348 if ((r = mount_add_node_links(MOUNT(u))) < 0)
351 if ((r = mount_add_path_links(MOUNT(u))) < 0)
354 if ((r = mount_add_target_links(MOUNT(u))) < 0)
357 if ((r = unit_add_default_cgroup(u)) < 0)
361 return mount_verify(m);
364 static void mount_set_state(Mount *m, MountState state) {
365 MountState old_state;
368 old_state = m->state;
371 if (state != MOUNT_MOUNTING &&
372 state != MOUNT_MOUNTING_DONE &&
373 state != MOUNT_REMOUNTING &&
374 state != MOUNT_UNMOUNTING &&
375 state != MOUNT_MOUNTING_SIGTERM &&
376 state != MOUNT_MOUNTING_SIGKILL &&
377 state != MOUNT_UNMOUNTING_SIGTERM &&
378 state != MOUNT_UNMOUNTING_SIGKILL &&
379 state != MOUNT_REMOUNTING_SIGTERM &&
380 state != MOUNT_REMOUNTING_SIGKILL) {
381 unit_unwatch_timer(UNIT(m), &m->timer_watch);
382 service_unwatch_control_pid(m);
383 m->control_command = NULL;
386 if (state == MOUNT_MOUNTED ||
387 state == MOUNT_REMOUNTING)
388 mount_notify_automount(m, 0);
389 else if (state == MOUNT_DEAD ||
390 state == MOUNT_UNMOUNTING ||
391 state == MOUNT_MOUNTING_SIGTERM ||
392 state == MOUNT_MOUNTING_SIGKILL ||
393 state == MOUNT_REMOUNTING_SIGTERM ||
394 state == MOUNT_REMOUNTING_SIGKILL ||
395 state == MOUNT_UNMOUNTING_SIGTERM ||
396 state == MOUNT_UNMOUNTING_SIGKILL ||
397 state == MOUNT_MAINTAINANCE)
398 mount_notify_automount(m, -ENODEV);
400 if (state != old_state)
401 log_debug("%s changed %s → %s", UNIT(m)->meta.id, state_string_table[old_state], state_string_table[state]);
403 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
406 static int mount_coldplug(Unit *u) {
410 assert(m->state == MOUNT_DEAD);
412 if (m->from_proc_self_mountinfo)
413 mount_set_state(m, MOUNT_MOUNTED);
418 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
426 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
429 if ((r = exec_spawn(c,
435 UNIT(m)->meta.manager->confirm_spawn,
436 UNIT(m)->meta.cgroup_bondings,
440 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
441 /* FIXME: we need to do something here */
449 unit_unwatch_timer(UNIT(m), &m->timer_watch);
454 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
461 if (m->from_proc_self_mountinfo)
462 p = &m->parameters_proc_self_mountinfo;
463 else if (m->from_fragment)
464 p = &m->parameters_fragment;
466 p = &m->parameters_etc_fstab;
469 "%sMount State: %s\n"
472 "%sFile System Type: %s\n"
474 "%sFrom /etc/fstab: %s\n"
475 "%sFrom /proc/self/mountinfo: %s\n"
476 "%sFrom fragment: %s\n"
478 prefix, state_string_table[m->state],
480 prefix, strna(p->what),
481 prefix, strna(p->fstype),
482 prefix, strna(p->options),
483 prefix, yes_no(m->from_etc_fstab),
484 prefix, yes_no(m->from_proc_self_mountinfo),
485 prefix, yes_no(m->from_fragment),
486 prefix, kill_mode_to_string(m->kill_mode));
488 if (m->control_pid > 0)
490 "%sControl PID: %llu\n",
491 prefix, (unsigned long long) m->control_pid);
493 exec_context_dump(&m->exec_context, f, prefix);
496 static void mount_enter_dead(Mount *m, bool success) {
502 mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
505 static void mount_enter_mounted(Mount *m, bool success) {
511 mount_set_state(m, MOUNT_MOUNTED);
514 static void mount_enter_signal(Mount *m, MountState state, bool success) {
523 if (m->kill_mode != KILL_NONE) {
524 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
525 state == MOUNT_UNMOUNTING_SIGTERM ||
526 state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
528 if (m->kill_mode == KILL_CONTROL_GROUP) {
530 if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
531 if (r != -EAGAIN && r != -ESRCH)
537 if (!sent && m->control_pid > 0)
538 if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
545 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
548 mount_set_state(m, state);
549 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
550 mount_enter_mounted(m, true);
552 mount_enter_dead(m, true);
557 log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
559 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
560 mount_enter_mounted(m, false);
562 mount_enter_dead(m, false);
565 static void mount_enter_unmounting(Mount *m, bool success) {
574 m->control_command = c = m->exec_command + MOUNT_EXEC_UNMOUNT;
576 if ((r = exec_command_set(
583 service_unwatch_control_pid(m);
585 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
588 mount_set_state(m, MOUNT_UNMOUNTING);
593 log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
594 mount_enter_mounted(m, false);
597 static void mount_enter_mounting(Mount *m) {
603 m->control_command = c = m->exec_command + MOUNT_EXEC_MOUNT;
605 if (m->from_fragment)
606 r = exec_command_set(
609 m->parameters_fragment.what,
611 "-t", m->parameters_fragment.fstype,
612 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
614 else if (m->from_etc_fstab)
615 r = exec_command_set(
626 service_unwatch_control_pid(m);
628 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
631 mount_set_state(m, MOUNT_MOUNTING);
636 log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
637 mount_enter_dead(m, false);
640 static void mount_enter_mounting_done(Mount *m) {
643 mount_set_state(m, MOUNT_MOUNTING_DONE);
646 static void mount_enter_remounting(Mount *m, bool success) {
655 m->control_command = c = m->exec_command + MOUNT_EXEC_REMOUNT;
657 if (m->from_fragment) {
661 if (m->parameters_fragment.options) {
662 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
671 r = exec_command_set(
674 m->parameters_fragment.what,
676 "-t", m->parameters_fragment.fstype,
681 } else if (m->from_etc_fstab)
682 r = exec_command_set(
696 service_unwatch_control_pid(m);
698 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
701 mount_set_state(m, MOUNT_REMOUNTING);
706 mount_enter_mounted(m, false);
709 static int mount_start(Unit *u) {
714 /* We cannot fulfill this request right now, try again later
716 if (m->state == MOUNT_UNMOUNTING ||
717 m->state == MOUNT_UNMOUNTING_SIGTERM ||
718 m->state == MOUNT_UNMOUNTING_SIGKILL)
722 if (m->state == MOUNT_MOUNTING ||
723 m->state == MOUNT_MOUNTING_SIGTERM ||
724 m->state == MOUNT_MOUNTING_SIGKILL)
727 assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
731 mount_enter_mounting(m);
735 static int mount_stop(Unit *u) {
740 /* Cann't do this right now. */
741 if (m->state == MOUNT_MOUNTING ||
742 m->state == MOUNT_MOUNTING_DONE ||
743 m->state == MOUNT_MOUNTING_SIGTERM ||
744 m->state == MOUNT_MOUNTING_SIGKILL ||
745 m->state == MOUNT_REMOUNTING ||
746 m->state == MOUNT_REMOUNTING_SIGTERM ||
747 m->state == MOUNT_REMOUNTING_SIGKILL)
751 if (m->state == MOUNT_UNMOUNTING ||
752 m->state == MOUNT_UNMOUNTING_SIGKILL ||
753 m->state == MOUNT_UNMOUNTING_SIGTERM)
756 assert(m->state == MOUNT_MOUNTED);
758 mount_enter_unmounting(m, true);
762 static int mount_reload(Unit *u) {
767 if (m->state == MOUNT_MOUNTING_DONE)
770 assert(m->state == MOUNT_MOUNTED);
772 mount_enter_remounting(m, true);
776 static UnitActiveState mount_active_state(Unit *u) {
779 return state_translation_table[MOUNT(u)->state];
782 static const char *mount_sub_state_to_string(Unit *u) {
785 return state_string_table[MOUNT(u)->state];
788 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
795 success = code == CLD_EXITED && status == 0;
796 m->failure = m->failure || !success;
798 assert(m->control_pid == pid);
799 assert(m->control_command);
801 exec_status_fill(&m->control_command->exec_status, pid, code, status);
804 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
806 /* Note that mount(8) returning and the kernel sending us a
807 * mount table change event might happen out-of-order. If an
808 * operation succeed we assume the kernel will follow soon too
809 * and already change into the resulting state. If it fails
810 * we check if the kernel still knows about the mount. and
811 * change state accordingly. */
816 case MOUNT_MOUNTING_DONE:
817 case MOUNT_MOUNTING_SIGKILL:
818 case MOUNT_MOUNTING_SIGTERM:
819 case MOUNT_REMOUNTING:
820 case MOUNT_REMOUNTING_SIGKILL:
821 case MOUNT_REMOUNTING_SIGTERM:
823 if (success && m->from_proc_self_mountinfo)
824 mount_enter_mounted(m, true);
825 else if (m->from_proc_self_mountinfo)
826 mount_enter_mounted(m, false);
828 mount_enter_dead(m, false);
831 case MOUNT_UNMOUNTING:
832 case MOUNT_UNMOUNTING_SIGKILL:
833 case MOUNT_UNMOUNTING_SIGTERM:
836 mount_enter_dead(m, true);
837 else if (m->from_proc_self_mountinfo)
838 mount_enter_mounted(m, false);
840 mount_enter_dead(m, false);
844 assert_not_reached("Uh, control process died at wrong time.");
848 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
852 assert(elapsed == 1);
853 assert(w == &m->timer_watch);
858 case MOUNT_MOUNTING_DONE:
859 log_warning("%s mounting timed out. Stopping.", u->meta.id);
860 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
863 case MOUNT_REMOUNTING:
864 log_warning("%s remounting timed out. Stopping.", u->meta.id);
865 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
868 case MOUNT_UNMOUNTING:
869 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
870 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
873 case MOUNT_MOUNTING_SIGTERM:
874 log_warning("%s mounting timed out. Killing.", u->meta.id);
875 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
878 case MOUNT_REMOUNTING_SIGTERM:
879 log_warning("%s remounting timed out. Killing.", u->meta.id);
880 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
883 case MOUNT_UNMOUNTING_SIGTERM:
884 log_warning("%s unmounting timed out. Killing.", u->meta.id);
885 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
888 case MOUNT_MOUNTING_SIGKILL:
889 case MOUNT_REMOUNTING_SIGKILL:
890 case MOUNT_UNMOUNTING_SIGKILL:
891 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
893 if (m->from_proc_self_mountinfo)
894 mount_enter_mounted(m, false);
896 mount_enter_dead(m, false);
900 assert_not_reached("Timeout at wrong time.");
904 static int mount_add_one(
910 bool from_proc_self_mountinfo,
915 char *e, *w = NULL, *o = NULL, *f = NULL;
924 assert(!set_flags || from_proc_self_mountinfo);
926 /* Ignore API mount points. They should never be referenced in
927 * dependencies ever. */
928 if (mount_point_is_api(where))
931 if (streq(fstype, "autofs"))
934 /* probably some kind of swap, which we don't cover for now */
938 e = mount_name_from_where(where);
943 if (!(u = manager_get_unit(m, e))) {
946 if (!(u = unit_new(m))) {
951 r = unit_add_name(u, e);
957 if (!(MOUNT(u)->where = strdup(where))) {
962 if ((r = unit_set_description(u, where)) < 0)
965 unit_add_to_load_queue(u);
971 if (!(w = strdup(what)) ||
972 !(o = strdup(options)) ||
973 !(f = strdup(fstype))) {
978 if (from_proc_self_mountinfo) {
979 mp = &MOUNT(u)->parameters_proc_self_mountinfo;
982 MOUNT(u)->is_mounted = true;
983 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
984 MOUNT(u)->just_changed = !streq_ptr(MOUNT(u)->parameters_proc_self_mountinfo.options, o);
987 MOUNT(u)->from_proc_self_mountinfo = true;
990 mp = &MOUNT(u)->parameters_etc_fstab;
992 MOUNT(u)->from_etc_fstab = true;
1004 unit_add_to_dbus_queue(u);
1019 static char *fstab_node_to_udev_node(char *p) {
1023 /* FIXME: to follow udev's logic 100% we need to leave valid
1024 * UTF8 chars unescaped */
1026 if (startswith(p, "LABEL=")) {
1028 if (!(t = xescape(p+6, "/ ")))
1031 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1040 if (startswith(p, "UUID=")) {
1042 if (!(t = xescape(p+5, "/ ")))
1045 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1057 static int mount_load_etc_fstab(Manager *m) {
1065 if (!(f = setmntent("/etc/fstab", "r")))
1068 while ((me = getmntent(f))) {
1071 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1076 if (!(where = strdup(me->mnt_dir))) {
1083 path_kill_slashes(what);
1085 if (where[0] == '/')
1086 path_kill_slashes(where);
1088 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1103 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1105 char *device, *path, *options, *fstype, *d, *p;
1109 rewind(m->proc_self_mountinfo);
1114 device = path = options = fstype = d = p = NULL;
1116 if ((k = fscanf(m->proc_self_mountinfo,
1117 "%*s " /* (1) mount id */
1118 "%*s " /* (2) parent id */
1119 "%*s " /* (3) major:minor */
1120 "%*s " /* (4) root */
1121 "%ms " /* (5) mount point */
1122 "%ms" /* (6) mount options */
1123 "%*[^-]" /* (7) optional fields */
1124 "- " /* (8) seperator */
1125 "%ms " /* (9) file system type */
1126 "%ms" /* (10) mount source */
1127 "%*[^\n]", /* some rubbish at the end */
1140 if (!(d = cunescape(device)) ||
1141 !(p = cunescape(path))) {
1146 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1170 static void mount_shutdown(Manager *m) {
1173 if (m->proc_self_mountinfo)
1174 fclose(m->proc_self_mountinfo);
1177 static int mount_enumerate(Manager *m) {
1179 struct epoll_event ev;
1182 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "r")))
1185 m->mount_watch.type = WATCH_MOUNT;
1186 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1189 ev.events = EPOLLERR;
1190 ev.data.ptr = &m->mount_watch;
1192 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1195 if ((r = mount_load_etc_fstab(m)) < 0)
1198 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1208 void mount_fd_event(Manager *m, int events) {
1213 assert(events == EPOLLERR);
1215 /* The manager calls this for every fd event happening on the
1216 * /proc/self/mountinfo file, which informs us about mounting
1219 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1220 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno));
1222 /* Reset flags, just in case, for later calls */
1223 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1224 Mount *mount = (Mount*) meta;
1226 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1232 manager_dispatch_load_queue(m);
1234 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1235 Mount *mount = (Mount*) meta;
1237 if (!mount->is_mounted) {
1238 /* This has just been unmounted. */
1240 mount->from_proc_self_mountinfo = false;
1242 switch (mount->state) {
1245 mount_enter_dead(mount, true);
1249 mount_set_state(mount, mount->state);
1254 } else if (mount->just_mounted || mount->just_changed) {
1256 /* New or changed entrymount */
1258 switch (mount->state) {
1261 case MOUNT_MAINTAINANCE:
1262 mount_enter_mounted(mount, true);
1265 case MOUNT_MOUNTING:
1266 mount_enter_mounting_done(mount);
1270 /* Nothing really changed, but let's
1271 * issue an notification call
1272 * nonetheless, in case somebody is
1273 * waiting for this. (e.g. file system
1274 * ro/rw remounts.) */
1275 mount_set_state(mount, mount->state);
1280 /* Reset the flags for later calls */
1281 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1285 int mount_path_is_mounted(Manager *m, const char* path) {
1295 if (!(t = strdup(path)))
1298 path_kill_slashes(t);
1304 if (!(e = mount_name_from_where(t))) {
1309 u = manager_get_unit(m, e);
1313 (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1314 MOUNT(u)->state != MOUNT_MOUNTED) {
1319 assert_se(slash = strrchr(t, '/'));
1336 const UnitVTable mount_vtable = {
1340 .no_instances = true,
1346 .coldplug = mount_coldplug,
1350 .start = mount_start,
1352 .reload = mount_reload,
1354 .active_state = mount_active_state,
1355 .sub_state_to_string = mount_sub_state_to_string,
1357 .sigchld_event = mount_sigchld_event,
1358 .timer_event = mount_timer_event,
1360 .enumerate = mount_enumerate,
1361 .shutdown = mount_shutdown