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"
36 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
37 [MOUNT_DEAD] = UNIT_INACTIVE,
38 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
39 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
40 [MOUNT_MOUNTED] = UNIT_ACTIVE,
41 [MOUNT_REMOUNTING] = UNIT_ACTIVE_RELOADING,
42 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
43 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
44 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
45 [MOUNT_REMOUNTING_SIGTERM] = UNIT_ACTIVE_RELOADING,
46 [MOUNT_REMOUNTING_SIGKILL] = UNIT_ACTIVE_RELOADING,
47 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
48 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
49 [MOUNT_MAINTAINANCE] = UNIT_INACTIVE,
52 static const char* const state_string_table[_MOUNT_STATE_MAX] = {
53 [MOUNT_DEAD] = "dead",
54 [MOUNT_MOUNTING] = "mounting",
55 [MOUNT_MOUNTING_DONE] = "mounting-done",
56 [MOUNT_MOUNTED] = "mounted",
57 [MOUNT_REMOUNTING] = "remounting",
58 [MOUNT_UNMOUNTING] = "unmounting",
59 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
60 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
61 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
62 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
63 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
64 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
65 [MOUNT_MAINTAINANCE] = "maintainance"
68 static void service_unwatch_control_pid(Mount *m) {
71 if (m->control_pid <= 0)
74 unit_unwatch_pid(UNIT(m), m->control_pid);
78 static void mount_parameters_done(MountParameters *p) {
85 p->what = p->options = p->fstype = NULL;
88 static void mount_done(Unit *u) {
96 mount_parameters_done(&m->parameters_etc_fstab);
97 mount_parameters_done(&m->parameters_proc_self_mountinfo);
98 mount_parameters_done(&m->parameters_fragment);
100 exec_context_done(&m->exec_context);
101 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
102 m->control_command = NULL;
104 service_unwatch_control_pid(m);
106 unit_unwatch_timer(u, &m->timer_watch);
109 static void mount_init(Unit *u) {
113 assert(u->meta.load_state == UNIT_STUB);
116 m->from_etc_fstab = false;
117 m->from_proc_self_mountinfo = false;
118 m->from_fragment = false;
120 m->is_mounted = false;
121 m->just_mounted = false;
122 m->just_changed = false;
124 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
126 zero(m->exec_command);
127 exec_context_init(&m->exec_context);
134 m->timer_watch.type = WATCH_INVALID;
137 static int mount_add_node_links(Mount *m) {
145 /* Adds in links to the device that this node is based on */
147 if (m->parameters_fragment.what)
148 what = m->parameters_fragment.what;
149 else if (m->parameters_etc_fstab.what)
150 what = m->parameters_etc_fstab.what;
152 /* We observe kernel mounts only while they are live,
153 * hence don't create any links for them */
156 if (!path_startswith(what, "/dev/"))
159 if (!(e = unit_name_escape_path(what+1, ".device")))
162 r = manager_load_unit(UNIT(m)->meta.manager, e, &device);
168 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, device)) < 0)
171 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, device)) < 0)
174 if (UNIT(m)->meta.manager->running_as == MANAGER_INIT ||
175 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)
176 if ((r = unit_add_dependency(device, UNIT_WANTS, UNIT(m))) < 0)
182 static int mount_add_path_links(Mount *m) {
188 /* Adds in link to other mount points, that might lie below or
189 * above us in the hierarchy */
191 LIST_FOREACH(units_per_type, other, UNIT(m)->meta.manager->units_per_type[UNIT_MOUNT]) {
199 if (m->meta.load_state != UNIT_LOADED)
202 if (path_startswith(m->where, n->where)) {
204 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(other))) < 0)
207 if (n->from_etc_fstab || n->from_fragment)
208 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(other))) < 0)
211 } else if (path_startswith(n->where, m->where)) {
213 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(other))) < 0)
216 if (m->from_etc_fstab || m->from_fragment)
217 if ((r = unit_add_dependency(UNIT(other), UNIT_REQUIRES, UNIT(m))) < 0)
225 static bool mount_test_option(const char *haystack, const char *needle) {
230 /* Like glibc's hasmntopt(), but works on a string, not a
237 me.mnt_opts = (char*) haystack;
239 return !!hasmntopt(&me, needle);
242 static int mount_add_target_links(Mount *m) {
250 if (m->from_fragment)
251 p = &m->parameters_fragment;
252 else if (m->from_etc_fstab)
253 p = &m->parameters_etc_fstab;
260 if (mount_test_option(p->options, MNTOPT_NOAUTO))
263 if (mount_test_option(p->options, "_netdev") ||
264 fstype_is_network(p->fstype))
265 target = SPECIAL_REMOTE_FS_TARGET;
267 target = SPECIAL_LOCAL_FS_TARGET;
269 if ((r = manager_load_unit(UNIT(m)->meta.manager, target, &u)) < 0)
272 if ((r = unit_add_dependency(u, UNIT_WANTS, UNIT(m))) < 0)
275 return unit_add_dependency(UNIT(m), UNIT_BEFORE, u);
278 static int mount_load(Unit *u) {
283 assert(u->meta.load_state == UNIT_STUB);
285 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
288 /* This is a new unit? Then let's add in some extras */
289 if (u->meta.load_state == UNIT_LOADED) {
291 /* Minor validity checking */
292 if ((m->parameters_fragment.options || m->parameters_fragment.fstype) && !m->parameters_fragment.what)
295 if (m->parameters_fragment.what)
296 m->from_fragment = true;
298 if ((r = mount_add_node_links(MOUNT(u))) < 0)
301 if ((r = mount_add_path_links(MOUNT(u))) < 0)
304 if ((r = mount_add_target_links(MOUNT(u))) < 0)
307 if ((r = unit_add_default_cgroup(u)) < 0)
314 static void mount_set_state(Mount *m, MountState state) {
315 MountState old_state;
318 old_state = m->state;
321 if (state != MOUNT_MOUNTING &&
322 state != MOUNT_MOUNTING_DONE &&
323 state != MOUNT_REMOUNTING &&
324 state != MOUNT_UNMOUNTING &&
325 state != MOUNT_MOUNTING_SIGTERM &&
326 state != MOUNT_MOUNTING_SIGKILL &&
327 state != MOUNT_UNMOUNTING_SIGTERM &&
328 state != MOUNT_UNMOUNTING_SIGKILL &&
329 state != MOUNT_REMOUNTING_SIGTERM &&
330 state != MOUNT_REMOUNTING_SIGKILL) {
331 unit_unwatch_timer(UNIT(m), &m->timer_watch);
332 service_unwatch_control_pid(m);
333 m->control_command = NULL;
336 if (state != old_state)
337 log_debug("%s changed %s → %s", unit_id(UNIT(m)), state_string_table[old_state], state_string_table[state]);
339 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
342 static int mount_coldplug(Unit *u) {
346 assert(m->state == MOUNT_DEAD);
348 if (m->from_proc_self_mountinfo)
349 mount_set_state(m, MOUNT_MOUNTED);
354 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
362 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
365 if ((r = exec_spawn(c,
370 UNIT(m)->meta.manager->confirm_spawn,
371 UNIT(m)->meta.cgroup_bondings,
375 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
376 /* FIXME: we need to do something here */
384 unit_unwatch_timer(UNIT(m), &m->timer_watch);
389 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
396 if (m->from_proc_self_mountinfo)
397 p = &m->parameters_proc_self_mountinfo;
398 else if (m->from_fragment)
399 p = &m->parameters_fragment;
401 p = &m->parameters_etc_fstab;
404 "%sMount State: %s\n"
407 "%sFile System Type: %s\n"
409 "%sFrom /etc/fstab: %s\n"
410 "%sFrom /proc/self/mountinfo: %s\n"
411 "%sFrom fragment: %s\n"
413 prefix, state_string_table[m->state],
415 prefix, strna(p->what),
416 prefix, strna(p->fstype),
417 prefix, strna(p->options),
418 prefix, yes_no(m->from_etc_fstab),
419 prefix, yes_no(m->from_proc_self_mountinfo),
420 prefix, yes_no(m->from_fragment),
421 prefix, kill_mode_to_string(m->kill_mode));
423 if (m->control_pid > 0)
425 "%sControl PID: %llu\n",
426 prefix, (unsigned long long) m->control_pid);
428 exec_context_dump(&m->exec_context, f, prefix);
431 static void mount_enter_dead(Mount *m, bool success) {
437 mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
440 static void mount_enter_mounted(Mount *m, bool success) {
446 mount_set_state(m, MOUNT_MOUNTED);
449 static void mount_enter_signal(Mount *m, MountState state, bool success) {
458 if (m->kill_mode != KILL_NONE) {
459 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
460 state == MOUNT_UNMOUNTING_SIGTERM ||
461 state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
463 if (m->kill_mode == KILL_CONTROL_GROUP) {
465 if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
466 if (r != -EAGAIN && r != -ESRCH)
472 if (!sent && m->control_pid > 0)
473 if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
480 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
483 mount_set_state(m, state);
484 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
485 mount_enter_mounted(m, true);
487 mount_enter_dead(m, true);
492 log_warning("%s failed to kill processes: %s", unit_id(UNIT(m)), strerror(-r));
494 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
495 mount_enter_mounted(m, false);
497 mount_enter_dead(m, false);
500 static void mount_enter_unmounting(Mount *m, bool success) {
509 m->control_command = c = m->exec_command + MOUNT_EXEC_UNMOUNT;
511 if ((r = exec_command_set(
518 service_unwatch_control_pid(m);
520 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
523 mount_set_state(m, MOUNT_UNMOUNTING);
528 log_warning("%s failed to run umount exectuable: %s", unit_id(UNIT(m)), strerror(-r));
529 mount_enter_mounted(m, false);
532 static void mount_enter_mounting(Mount *m, bool success) {
541 m->control_command = c = m->exec_command + MOUNT_EXEC_MOUNT;
543 if (m->from_fragment)
544 r = exec_command_set(
547 m->parameters_fragment.what,
549 "-t", m->parameters_fragment.fstype,
550 "-o", m->parameters_fragment.options,
552 else if (m->from_etc_fstab)
553 r = exec_command_set(
564 service_unwatch_control_pid(m);
566 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
569 mount_set_state(m, MOUNT_MOUNTING);
574 log_warning("%s failed to run mount exectuable: %s", unit_id(UNIT(m)), strerror(-r));
575 mount_enter_dead(m, false);
578 static void mount_enter_mounting_done(Mount *m, bool success) {
584 mount_set_state(m, MOUNT_MOUNTING_DONE);
587 static void mount_enter_remounting(Mount *m, bool success) {
596 m->control_command = c = m->exec_command + MOUNT_EXEC_REMOUNT;
598 if (m->from_fragment) {
602 if (m->parameters_fragment.options) {
603 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
612 r = exec_command_set(
615 m->parameters_fragment.what,
617 "-t", m->parameters_fragment.fstype,
622 } else if (m->from_etc_fstab)
623 r = exec_command_set(
637 service_unwatch_control_pid(m);
639 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
642 mount_set_state(m, MOUNT_REMOUNTING);
647 mount_enter_mounted(m, false);
650 static int mount_start(Unit *u) {
655 /* We cannot fulfill this request right now, try again later
657 if (m->state == MOUNT_UNMOUNTING ||
658 m->state == MOUNT_UNMOUNTING_SIGTERM ||
659 m->state == MOUNT_UNMOUNTING_SIGKILL)
663 if (m->state == MOUNT_MOUNTING ||
664 m->state == MOUNT_MOUNTING_SIGTERM ||
665 m->state == MOUNT_MOUNTING_SIGKILL)
668 assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
672 mount_enter_mounting(m, true);
676 static int mount_stop(Unit *u) {
681 /* Cann't do this right now. */
682 if (m->state == MOUNT_MOUNTING ||
683 m->state == MOUNT_MOUNTING_DONE ||
684 m->state == MOUNT_MOUNTING_SIGTERM ||
685 m->state == MOUNT_MOUNTING_SIGKILL ||
686 m->state == MOUNT_REMOUNTING ||
687 m->state == MOUNT_REMOUNTING_SIGTERM ||
688 m->state == MOUNT_REMOUNTING_SIGKILL)
692 if (m->state == MOUNT_UNMOUNTING ||
693 m->state == MOUNT_UNMOUNTING_SIGKILL ||
694 m->state == MOUNT_UNMOUNTING_SIGTERM)
697 assert(m->state == MOUNT_MOUNTED);
699 mount_enter_unmounting(m, true);
703 static int mount_reload(Unit *u) {
708 if (m->state == MOUNT_MOUNTING_DONE)
711 assert(m->state == MOUNT_MOUNTED);
713 mount_enter_remounting(m, true);
717 static UnitActiveState mount_active_state(Unit *u) {
720 return state_translation_table[MOUNT(u)->state];
723 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
730 success = code == CLD_EXITED && status == 0;
731 m->failure = m->failure || !success;
733 assert(m->control_pid == pid);
734 assert(m->control_command);
736 exec_status_fill(&m->control_command->exec_status, pid, code, status);
739 log_debug("%s control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
741 /* Note that mount(8) returning and the kernel sending us a
742 * mount table change event might happen out-of-order. If an
743 * operation succeed we assume the kernel will follow soon too
744 * and already change into the resulting state. If it fails
745 * we check if the kernel still knows about the mount. and
746 * change state accordingly. */
751 case MOUNT_MOUNTING_DONE:
752 case MOUNT_MOUNTING_SIGKILL:
753 case MOUNT_MOUNTING_SIGTERM:
754 case MOUNT_REMOUNTING:
755 case MOUNT_REMOUNTING_SIGKILL:
756 case MOUNT_REMOUNTING_SIGTERM:
758 if (success && m->from_proc_self_mountinfo)
759 mount_enter_mounted(m, true);
760 else if (m->from_proc_self_mountinfo)
761 mount_enter_mounted(m, false);
763 mount_enter_dead(m, false);
766 case MOUNT_UNMOUNTING:
767 case MOUNT_UNMOUNTING_SIGKILL:
768 case MOUNT_UNMOUNTING_SIGTERM:
771 mount_enter_dead(m, true);
772 else if (m->from_proc_self_mountinfo)
773 mount_enter_mounted(m, false);
775 mount_enter_dead(m, false);
779 assert_not_reached("Uh, control process died at wrong time.");
783 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
787 assert(elapsed == 1);
788 assert(w == &m->timer_watch);
793 case MOUNT_MOUNTING_DONE:
794 log_warning("%s mounting timed out. Stopping.", unit_id(u));
795 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
798 case MOUNT_REMOUNTING:
799 log_warning("%s remounting timed out. Stopping.", unit_id(u));
800 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
803 case MOUNT_UNMOUNTING:
804 log_warning("%s unmounting timed out. Stopping.", unit_id(u));
805 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
808 case MOUNT_MOUNTING_SIGTERM:
809 log_warning("%s mounting timed out. Killing.", unit_id(u));
810 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
813 case MOUNT_REMOUNTING_SIGTERM:
814 log_warning("%s remounting timed out. Killing.", unit_id(u));
815 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
818 case MOUNT_UNMOUNTING_SIGTERM:
819 log_warning("%s unmounting timed out. Killing.", unit_id(u));
820 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
823 case MOUNT_MOUNTING_SIGKILL:
824 case MOUNT_REMOUNTING_SIGKILL:
825 case MOUNT_UNMOUNTING_SIGKILL:
826 log_warning("%s mount process still around after SIGKILL. Ignoring.", unit_id(u));
828 if (m->from_proc_self_mountinfo)
829 mount_enter_mounted(m, false);
831 mount_enter_dead(m, false);
835 assert_not_reached("Timeout at wrong time.");
839 static int mount_add_one(
845 bool from_proc_self_mountinfo,
850 char *e, *w = NULL, *o = NULL, *f = NULL;
859 assert(!set_flags || from_proc_self_mountinfo);
861 /* Ignore API mount points. They should never be referenced in
862 * dependencies ever. */
863 if (mount_point_is_api(where))
866 /* probably some kind of swap, which we don't cover for now */
870 if (streq(where, "/"))
871 e = strdup("-.mount");
873 e = unit_name_escape_path(where+1, ".mount");
878 if (!(u = manager_get_unit(m, e))) {
881 if (!(u = unit_new(m))) {
886 r = unit_add_name(u, e);
892 if (!(MOUNT(u)->where = strdup(where))) {
897 if ((r = unit_set_description(u, where)) < 0)
900 unit_add_to_load_queue(u);
906 if (!(w = strdup(what)) ||
907 !(o = strdup(options)) ||
908 !(f = strdup(fstype))) {
913 if (from_proc_self_mountinfo) {
914 mp = &MOUNT(u)->parameters_proc_self_mountinfo;
917 MOUNT(u)->is_mounted = true;
918 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
919 MOUNT(u)->just_changed = !streq_ptr(MOUNT(u)->parameters_proc_self_mountinfo.options, o);
922 MOUNT(u)->from_proc_self_mountinfo = true;
925 mp = &MOUNT(u)->parameters_etc_fstab;
927 MOUNT(u)->from_etc_fstab = true;
939 unit_add_to_dbus_queue(u);
954 static char *fstab_node_to_udev_node(char *p) {
958 /* FIXME: to follow udev's logic 100% we need to leave valid
959 * UTF8 chars unescaped */
961 if (startswith(p, "LABEL=")) {
963 if (!(t = xescape(p+6, "/ ")))
966 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
975 if (startswith(p, "UUID=")) {
977 if (!(t = xescape(p+5, "/ ")))
980 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
992 static int mount_load_etc_fstab(Manager *m) {
1000 if (!(f = setmntent("/etc/fstab", "r")))
1003 while ((me = getmntent(f))) {
1006 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1011 if (!(where = strdup(me->mnt_dir))) {
1018 path_kill_slashes(what);
1020 if (where[0] == '/')
1021 path_kill_slashes(where);
1023 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1038 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1040 char *device, *path, *options, *fstype, *d, *p;
1044 rewind(m->proc_self_mountinfo);
1049 device = path = options = fstype = d = p = NULL;
1051 if ((k = fscanf(m->proc_self_mountinfo,
1052 "%*s " /* (1) mount id */
1053 "%*s " /* (2) parent id */
1054 "%*s " /* (3) major:minor */
1055 "%*s " /* (4) root */
1056 "%ms " /* (5) mount point */
1057 "%ms" /* (6) mount options */
1058 "%*[^-]" /* (7) optional fields */
1059 "- " /* (8) seperator */
1060 "%ms " /* (9) file system type */
1061 "%ms" /* (10) mount source */
1062 "%*[^\n]", /* some rubbish at the end */
1075 if (!(d = cunescape(device)) ||
1076 !(p = cunescape(path))) {
1081 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1105 static void mount_shutdown(Manager *m) {
1108 if (m->proc_self_mountinfo)
1109 fclose(m->proc_self_mountinfo);
1112 static int mount_enumerate(Manager *m) {
1114 struct epoll_event ev;
1117 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "r")))
1120 m->mount_watch.type = WATCH_MOUNT;
1121 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1124 ev.events = EPOLLERR;
1125 ev.data.ptr = &m->mount_watch;
1127 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1130 if ((r = mount_load_etc_fstab(m)) < 0)
1133 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1143 void mount_fd_event(Manager *m, int events) {
1148 assert(events == EPOLLERR);
1150 /* The manager calls this for every fd event happening on the
1151 * /proc/self/mountinfo file, which informs us about mounting
1154 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1155 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno));
1157 /* Reset flags, just in case, for later calls */
1158 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1159 Mount *mount = (Mount*) meta;
1161 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1167 manager_dispatch_load_queue(m);
1169 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1170 Mount *mount = (Mount*) meta;
1172 if (!mount->is_mounted) {
1173 /* This has just been unmounted. */
1175 mount->from_proc_self_mountinfo = false;
1177 switch (mount->state) {
1180 mount_enter_dead(mount, true);
1184 mount_set_state(mount, mount->state);
1189 } else if (mount->just_mounted || mount->just_changed) {
1191 /* New or changed entrymount */
1193 switch (mount->state) {
1196 case MOUNT_MAINTAINANCE:
1197 mount_enter_mounted(mount, true);
1200 case MOUNT_MOUNTING:
1201 mount_enter_mounting_done(mount, true);
1205 /* Nothing really changed, but let's
1206 * issue an notification call
1207 * nonetheless, in case somebody is
1208 * waiting for this. (e.g. file system
1209 * ro/rw remounts.) */
1210 mount_set_state(mount, mount->state);
1215 /* Reset the flags for later calls */
1216 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1220 int mount_path_is_mounted(Manager *m, const char* path) {
1230 if (!(t = strdup(path)))
1233 path_kill_slashes(t);
1239 if (!(e = unit_name_escape_path(t+1, ".mount"))) {
1244 u = manager_get_unit(m, e);
1248 (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1249 MOUNT(u)->state != MOUNT_MOUNTED) {
1254 assert_se(slash = strrchr(t, '/'));
1271 const UnitVTable mount_vtable = {
1280 .coldplug = mount_coldplug,
1284 .start = mount_start,
1286 .reload = mount_reload,
1288 .active_state = mount_active_state,
1290 .sigchld_event = mount_sigchld_event,
1291 .timer_event = mount_timer_event,
1293 .enumerate = mount_enumerate,
1294 .shutdown = mount_shutdown