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 void service_unwatch_control_pid(Mount *m) {
72 if (m->control_pid <= 0)
75 unit_unwatch_pid(UNIT(m), m->control_pid);
79 static void mount_parameters_done(MountParameters *p) {
86 p->what = p->options = p->fstype = NULL;
89 static void mount_done(Unit *u) {
97 mount_parameters_done(&m->parameters_etc_fstab);
98 mount_parameters_done(&m->parameters_proc_self_mountinfo);
99 mount_parameters_done(&m->parameters_fragment);
101 exec_context_done(&m->exec_context);
102 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
103 m->control_command = NULL;
105 service_unwatch_control_pid(m);
107 unit_unwatch_timer(u, &m->timer_watch);
110 static void mount_init(Unit *u) {
114 assert(u->meta.load_state == UNIT_STUB);
117 m->from_etc_fstab = false;
118 m->from_proc_self_mountinfo = false;
119 m->from_fragment = false;
121 m->is_mounted = false;
122 m->just_mounted = false;
123 m->just_changed = false;
125 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
127 zero(m->exec_command);
128 exec_context_init(&m->exec_context);
135 m->timer_watch.type = WATCH_INVALID;
138 static int mount_add_node_links(Mount *m) {
146 /* Adds in links to the device that this node is based on */
148 if (m->parameters_fragment.what)
149 what = m->parameters_fragment.what;
150 else if (m->parameters_etc_fstab.what)
151 what = m->parameters_etc_fstab.what;
153 /* We observe kernel mounts only while they are live,
154 * hence don't create any links for them */
157 if (!path_startswith(what, "/dev/"))
160 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
163 r = manager_load_unit(UNIT(m)->meta.manager, e, NULL, &device);
169 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, device)) < 0)
172 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, device)) < 0)
175 if (UNIT(m)->meta.manager->running_as == MANAGER_INIT ||
176 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)
177 if ((r = unit_add_dependency(device, UNIT_WANTS, UNIT(m))) < 0)
183 static int mount_add_path_links(Mount *m) {
189 /* Adds in link to other mount points, that might lie below or
190 * above us in the hierarchy */
192 LIST_FOREACH(units_per_type, other, UNIT(m)->meta.manager->units_per_type[UNIT_MOUNT]) {
200 if (m->meta.load_state != UNIT_LOADED)
203 if (path_startswith(m->where, n->where)) {
205 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(other))) < 0)
208 if (n->from_etc_fstab || n->from_fragment)
209 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(other))) < 0)
212 } else if (path_startswith(n->where, m->where)) {
214 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(other))) < 0)
217 if (m->from_etc_fstab || m->from_fragment)
218 if ((r = unit_add_dependency(UNIT(other), UNIT_REQUIRES, UNIT(m))) < 0)
226 static bool mount_test_option(const char *haystack, const char *needle) {
231 /* Like glibc's hasmntopt(), but works on a string, not a
238 me.mnt_opts = (char*) haystack;
240 return !!hasmntopt(&me, needle);
243 static int mount_add_target_links(Mount *m) {
253 if (m->from_fragment)
254 p = &m->parameters_fragment;
255 else if (m->from_etc_fstab)
256 p = &m->parameters_etc_fstab;
260 noauto = mount_test_option(p->options, MNTOPT_NOAUTO);
261 handle = mount_test_option(p->options, "comment=systemd.mount");
263 if (noauto && !handle)
266 if (mount_test_option(p->options, "_netdev") ||
267 fstype_is_network(p->fstype))
268 target = SPECIAL_REMOTE_FS_TARGET;
270 target = SPECIAL_LOCAL_FS_TARGET;
272 if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &u)) < 0)
276 if ((r = unit_add_dependency(u, UNIT_WANTS, UNIT(m))) < 0)
279 return unit_add_dependency(UNIT(m), UNIT_BEFORE, u);
282 static int mount_load(Unit *u) {
287 assert(u->meta.load_state == UNIT_STUB);
289 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
292 /* This is a new unit? Then let's add in some extras */
293 if (u->meta.load_state == UNIT_LOADED) {
295 /* Minor validity checking */
296 if ((m->parameters_fragment.options || m->parameters_fragment.fstype) && !m->parameters_fragment.what)
299 if (m->parameters_fragment.what)
300 m->from_fragment = true;
302 if ((r = mount_add_node_links(MOUNT(u))) < 0)
305 if ((r = mount_add_path_links(MOUNT(u))) < 0)
308 if ((r = mount_add_target_links(MOUNT(u))) < 0)
311 if ((r = unit_add_default_cgroup(u)) < 0)
318 static void mount_set_state(Mount *m, MountState state) {
319 MountState old_state;
322 old_state = m->state;
325 if (state != MOUNT_MOUNTING &&
326 state != MOUNT_MOUNTING_DONE &&
327 state != MOUNT_REMOUNTING &&
328 state != MOUNT_UNMOUNTING &&
329 state != MOUNT_MOUNTING_SIGTERM &&
330 state != MOUNT_MOUNTING_SIGKILL &&
331 state != MOUNT_UNMOUNTING_SIGTERM &&
332 state != MOUNT_UNMOUNTING_SIGKILL &&
333 state != MOUNT_REMOUNTING_SIGTERM &&
334 state != MOUNT_REMOUNTING_SIGKILL) {
335 unit_unwatch_timer(UNIT(m), &m->timer_watch);
336 service_unwatch_control_pid(m);
337 m->control_command = NULL;
340 if (state != old_state)
341 log_debug("%s changed %s → %s", UNIT(m)->meta.id, state_string_table[old_state], state_string_table[state]);
343 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
346 static int mount_coldplug(Unit *u) {
350 assert(m->state == MOUNT_DEAD);
352 if (m->from_proc_self_mountinfo)
353 mount_set_state(m, MOUNT_MOUNTED);
358 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
366 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
369 if ((r = exec_spawn(c,
375 UNIT(m)->meta.manager->confirm_spawn,
376 UNIT(m)->meta.cgroup_bondings,
380 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
381 /* FIXME: we need to do something here */
389 unit_unwatch_timer(UNIT(m), &m->timer_watch);
394 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
401 if (m->from_proc_self_mountinfo)
402 p = &m->parameters_proc_self_mountinfo;
403 else if (m->from_fragment)
404 p = &m->parameters_fragment;
406 p = &m->parameters_etc_fstab;
409 "%sMount State: %s\n"
412 "%sFile System Type: %s\n"
414 "%sFrom /etc/fstab: %s\n"
415 "%sFrom /proc/self/mountinfo: %s\n"
416 "%sFrom fragment: %s\n"
418 prefix, state_string_table[m->state],
420 prefix, strna(p->what),
421 prefix, strna(p->fstype),
422 prefix, strna(p->options),
423 prefix, yes_no(m->from_etc_fstab),
424 prefix, yes_no(m->from_proc_self_mountinfo),
425 prefix, yes_no(m->from_fragment),
426 prefix, kill_mode_to_string(m->kill_mode));
428 if (m->control_pid > 0)
430 "%sControl PID: %llu\n",
431 prefix, (unsigned long long) m->control_pid);
433 exec_context_dump(&m->exec_context, f, prefix);
436 static void mount_enter_dead(Mount *m, bool success) {
442 mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
445 static void mount_enter_mounted(Mount *m, bool success) {
451 mount_set_state(m, MOUNT_MOUNTED);
454 static void mount_enter_signal(Mount *m, MountState state, bool success) {
463 if (m->kill_mode != KILL_NONE) {
464 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
465 state == MOUNT_UNMOUNTING_SIGTERM ||
466 state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
468 if (m->kill_mode == KILL_CONTROL_GROUP) {
470 if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
471 if (r != -EAGAIN && r != -ESRCH)
477 if (!sent && m->control_pid > 0)
478 if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
485 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
488 mount_set_state(m, state);
489 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
490 mount_enter_mounted(m, true);
492 mount_enter_dead(m, true);
497 log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
499 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
500 mount_enter_mounted(m, false);
502 mount_enter_dead(m, false);
505 static void mount_enter_unmounting(Mount *m, bool success) {
514 m->control_command = c = m->exec_command + MOUNT_EXEC_UNMOUNT;
516 if ((r = exec_command_set(
523 service_unwatch_control_pid(m);
525 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
528 mount_set_state(m, MOUNT_UNMOUNTING);
533 log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
534 mount_enter_mounted(m, false);
537 static void mount_enter_mounting(Mount *m, bool success) {
546 m->control_command = c = m->exec_command + MOUNT_EXEC_MOUNT;
548 if (m->from_fragment)
549 r = exec_command_set(
552 m->parameters_fragment.what,
554 "-t", m->parameters_fragment.fstype,
555 "-o", m->parameters_fragment.options,
557 else if (m->from_etc_fstab)
558 r = exec_command_set(
569 service_unwatch_control_pid(m);
571 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
574 mount_set_state(m, MOUNT_MOUNTING);
579 log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
580 mount_enter_dead(m, false);
583 static void mount_enter_mounting_done(Mount *m, bool success) {
589 mount_set_state(m, MOUNT_MOUNTING_DONE);
592 static void mount_enter_remounting(Mount *m, bool success) {
601 m->control_command = c = m->exec_command + MOUNT_EXEC_REMOUNT;
603 if (m->from_fragment) {
607 if (m->parameters_fragment.options) {
608 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
617 r = exec_command_set(
620 m->parameters_fragment.what,
622 "-t", m->parameters_fragment.fstype,
627 } else if (m->from_etc_fstab)
628 r = exec_command_set(
642 service_unwatch_control_pid(m);
644 if ((r = mount_spawn(m, c, &m->control_pid)) < 0)
647 mount_set_state(m, MOUNT_REMOUNTING);
652 mount_enter_mounted(m, false);
655 static int mount_start(Unit *u) {
660 /* We cannot fulfill this request right now, try again later
662 if (m->state == MOUNT_UNMOUNTING ||
663 m->state == MOUNT_UNMOUNTING_SIGTERM ||
664 m->state == MOUNT_UNMOUNTING_SIGKILL)
668 if (m->state == MOUNT_MOUNTING ||
669 m->state == MOUNT_MOUNTING_SIGTERM ||
670 m->state == MOUNT_MOUNTING_SIGKILL)
673 assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
677 mount_enter_mounting(m, true);
681 static int mount_stop(Unit *u) {
686 /* Cann't do this right now. */
687 if (m->state == MOUNT_MOUNTING ||
688 m->state == MOUNT_MOUNTING_DONE ||
689 m->state == MOUNT_MOUNTING_SIGTERM ||
690 m->state == MOUNT_MOUNTING_SIGKILL ||
691 m->state == MOUNT_REMOUNTING ||
692 m->state == MOUNT_REMOUNTING_SIGTERM ||
693 m->state == MOUNT_REMOUNTING_SIGKILL)
697 if (m->state == MOUNT_UNMOUNTING ||
698 m->state == MOUNT_UNMOUNTING_SIGKILL ||
699 m->state == MOUNT_UNMOUNTING_SIGTERM)
702 assert(m->state == MOUNT_MOUNTED);
704 mount_enter_unmounting(m, true);
708 static int mount_reload(Unit *u) {
713 if (m->state == MOUNT_MOUNTING_DONE)
716 assert(m->state == MOUNT_MOUNTED);
718 mount_enter_remounting(m, true);
722 static UnitActiveState mount_active_state(Unit *u) {
725 return state_translation_table[MOUNT(u)->state];
728 static const char *mount_sub_state_to_string(Unit *u) {
731 return state_string_table[MOUNT(u)->state];
734 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
741 success = code == CLD_EXITED && status == 0;
742 m->failure = m->failure || !success;
744 assert(m->control_pid == pid);
745 assert(m->control_command);
747 exec_status_fill(&m->control_command->exec_status, pid, code, status);
750 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
752 /* Note that mount(8) returning and the kernel sending us a
753 * mount table change event might happen out-of-order. If an
754 * operation succeed we assume the kernel will follow soon too
755 * and already change into the resulting state. If it fails
756 * we check if the kernel still knows about the mount. and
757 * change state accordingly. */
762 case MOUNT_MOUNTING_DONE:
763 case MOUNT_MOUNTING_SIGKILL:
764 case MOUNT_MOUNTING_SIGTERM:
765 case MOUNT_REMOUNTING:
766 case MOUNT_REMOUNTING_SIGKILL:
767 case MOUNT_REMOUNTING_SIGTERM:
769 if (success && m->from_proc_self_mountinfo)
770 mount_enter_mounted(m, true);
771 else if (m->from_proc_self_mountinfo)
772 mount_enter_mounted(m, false);
774 mount_enter_dead(m, false);
777 case MOUNT_UNMOUNTING:
778 case MOUNT_UNMOUNTING_SIGKILL:
779 case MOUNT_UNMOUNTING_SIGTERM:
782 mount_enter_dead(m, true);
783 else if (m->from_proc_self_mountinfo)
784 mount_enter_mounted(m, false);
786 mount_enter_dead(m, false);
790 assert_not_reached("Uh, control process died at wrong time.");
794 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
798 assert(elapsed == 1);
799 assert(w == &m->timer_watch);
804 case MOUNT_MOUNTING_DONE:
805 log_warning("%s mounting timed out. Stopping.", u->meta.id);
806 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
809 case MOUNT_REMOUNTING:
810 log_warning("%s remounting timed out. Stopping.", u->meta.id);
811 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
814 case MOUNT_UNMOUNTING:
815 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
816 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
819 case MOUNT_MOUNTING_SIGTERM:
820 log_warning("%s mounting timed out. Killing.", u->meta.id);
821 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
824 case MOUNT_REMOUNTING_SIGTERM:
825 log_warning("%s remounting timed out. Killing.", u->meta.id);
826 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
829 case MOUNT_UNMOUNTING_SIGTERM:
830 log_warning("%s unmounting timed out. Killing.", u->meta.id);
831 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
834 case MOUNT_MOUNTING_SIGKILL:
835 case MOUNT_REMOUNTING_SIGKILL:
836 case MOUNT_UNMOUNTING_SIGKILL:
837 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
839 if (m->from_proc_self_mountinfo)
840 mount_enter_mounted(m, false);
842 mount_enter_dead(m, false);
846 assert_not_reached("Timeout at wrong time.");
850 static int mount_add_one(
856 bool from_proc_self_mountinfo,
861 char *e, *w = NULL, *o = NULL, *f = NULL;
870 assert(!set_flags || from_proc_self_mountinfo);
872 /* Ignore API mount points. They should never be referenced in
873 * dependencies ever. */
874 if (mount_point_is_api(where))
877 /* probably some kind of swap, which we don't cover for now */
881 if (streq(where, "/"))
882 e = strdup("-.mount");
884 e = unit_name_build_escape(where+1, NULL, ".mount");
889 if (!(u = manager_get_unit(m, e))) {
892 if (!(u = unit_new(m))) {
897 r = unit_add_name(u, e);
903 if (!(MOUNT(u)->where = strdup(where))) {
908 if ((r = unit_set_description(u, where)) < 0)
911 unit_add_to_load_queue(u);
917 if (!(w = strdup(what)) ||
918 !(o = strdup(options)) ||
919 !(f = strdup(fstype))) {
924 if (from_proc_self_mountinfo) {
925 mp = &MOUNT(u)->parameters_proc_self_mountinfo;
928 MOUNT(u)->is_mounted = true;
929 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
930 MOUNT(u)->just_changed = !streq_ptr(MOUNT(u)->parameters_proc_self_mountinfo.options, o);
933 MOUNT(u)->from_proc_self_mountinfo = true;
936 mp = &MOUNT(u)->parameters_etc_fstab;
938 MOUNT(u)->from_etc_fstab = true;
950 unit_add_to_dbus_queue(u);
965 static char *fstab_node_to_udev_node(char *p) {
969 /* FIXME: to follow udev's logic 100% we need to leave valid
970 * UTF8 chars unescaped */
972 if (startswith(p, "LABEL=")) {
974 if (!(t = xescape(p+6, "/ ")))
977 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
986 if (startswith(p, "UUID=")) {
988 if (!(t = xescape(p+5, "/ ")))
991 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1003 static int mount_load_etc_fstab(Manager *m) {
1011 if (!(f = setmntent("/etc/fstab", "r")))
1014 while ((me = getmntent(f))) {
1017 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1022 if (!(where = strdup(me->mnt_dir))) {
1029 path_kill_slashes(what);
1031 if (where[0] == '/')
1032 path_kill_slashes(where);
1034 r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
1049 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1051 char *device, *path, *options, *fstype, *d, *p;
1055 rewind(m->proc_self_mountinfo);
1060 device = path = options = fstype = d = p = NULL;
1062 if ((k = fscanf(m->proc_self_mountinfo,
1063 "%*s " /* (1) mount id */
1064 "%*s " /* (2) parent id */
1065 "%*s " /* (3) major:minor */
1066 "%*s " /* (4) root */
1067 "%ms " /* (5) mount point */
1068 "%ms" /* (6) mount options */
1069 "%*[^-]" /* (7) optional fields */
1070 "- " /* (8) seperator */
1071 "%ms " /* (9) file system type */
1072 "%ms" /* (10) mount source */
1073 "%*[^\n]", /* some rubbish at the end */
1086 if (!(d = cunescape(device)) ||
1087 !(p = cunescape(path))) {
1092 if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
1116 static void mount_shutdown(Manager *m) {
1119 if (m->proc_self_mountinfo)
1120 fclose(m->proc_self_mountinfo);
1123 static int mount_enumerate(Manager *m) {
1125 struct epoll_event ev;
1128 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "r")))
1131 m->mount_watch.type = WATCH_MOUNT;
1132 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1135 ev.events = EPOLLERR;
1136 ev.data.ptr = &m->mount_watch;
1138 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1141 if ((r = mount_load_etc_fstab(m)) < 0)
1144 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1154 void mount_fd_event(Manager *m, int events) {
1159 assert(events == EPOLLERR);
1161 /* The manager calls this for every fd event happening on the
1162 * /proc/self/mountinfo file, which informs us about mounting
1165 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1166 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno));
1168 /* Reset flags, just in case, for later calls */
1169 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1170 Mount *mount = (Mount*) meta;
1172 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1178 manager_dispatch_load_queue(m);
1180 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1181 Mount *mount = (Mount*) meta;
1183 if (!mount->is_mounted) {
1184 /* This has just been unmounted. */
1186 mount->from_proc_self_mountinfo = false;
1188 switch (mount->state) {
1191 mount_enter_dead(mount, true);
1195 mount_set_state(mount, mount->state);
1200 } else if (mount->just_mounted || mount->just_changed) {
1202 /* New or changed entrymount */
1204 switch (mount->state) {
1207 case MOUNT_MAINTAINANCE:
1208 mount_enter_mounted(mount, true);
1211 case MOUNT_MOUNTING:
1212 mount_enter_mounting_done(mount, true);
1216 /* Nothing really changed, but let's
1217 * issue an notification call
1218 * nonetheless, in case somebody is
1219 * waiting for this. (e.g. file system
1220 * ro/rw remounts.) */
1221 mount_set_state(mount, mount->state);
1226 /* Reset the flags for later calls */
1227 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1231 int mount_path_is_mounted(Manager *m, const char* path) {
1241 if (!(t = strdup(path)))
1244 path_kill_slashes(t);
1250 if (!(e = unit_name_build_escape(t+1, NULL, ".mount"))) {
1255 u = manager_get_unit(m, e);
1259 (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
1260 MOUNT(u)->state != MOUNT_MOUNTED) {
1265 assert_se(slash = strrchr(t, '/'));
1282 const UnitVTable mount_vtable = {
1286 .no_instances = true,
1292 .coldplug = mount_coldplug,
1296 .start = mount_start,
1298 .reload = mount_reload,
1300 .active_state = mount_active_state,
1301 .sub_state_to_string = mount_sub_state_to_string,
1303 .sigchld_event = mount_sigchld_event,
1304 .timer_event = mount_timer_event,
1306 .enumerate = mount_enumerate,
1307 .shutdown = mount_shutdown