1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/epoll.h>
30 #include "load-fragment.h"
31 #include "load-dropin.h"
34 #include "mount-setup.h"
35 #include "unit-name.h"
36 #include "dbus-mount.h"
38 #include "bus-errors.h"
40 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
41 [MOUNT_DEAD] = UNIT_INACTIVE,
42 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
43 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
44 [MOUNT_MOUNTED] = UNIT_ACTIVE,
45 [MOUNT_REMOUNTING] = UNIT_RELOADING,
46 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
47 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
48 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
49 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
50 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
51 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
52 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
53 [MOUNT_FAILED] = UNIT_FAILED
56 static void mount_init(Unit *u) {
60 assert(u->meta.load_state == UNIT_STUB);
62 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
63 m->directory_mode = 0755;
65 exec_context_init(&m->exec_context);
67 /* We need to make sure that /bin/mount is always called in
68 * the same process group as us, so that the autofs kernel
69 * side doesn't send us another mount request while we are
70 * already trying to comply its last one. */
71 m->exec_context.same_pgrp = true;
73 /* Make sure we unmount when the devices we require go away */
74 m->meta.stop_retroactively = true;
76 m->timer_watch.type = WATCH_INVALID;
78 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
81 static void mount_unwatch_control_pid(Mount *m) {
84 if (m->control_pid <= 0)
87 unit_unwatch_pid(UNIT(m), m->control_pid);
91 static void mount_parameters_done(MountParameters *p) {
98 p->what = p->options = p->fstype = NULL;
101 static void mount_done(Unit *u) {
109 mount_parameters_done(&m->parameters_etc_fstab);
110 mount_parameters_done(&m->parameters_proc_self_mountinfo);
111 mount_parameters_done(&m->parameters_fragment);
113 exec_context_done(&m->exec_context);
114 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
115 m->control_command = NULL;
117 mount_unwatch_control_pid(m);
119 unit_unwatch_timer(u, &m->timer_watch);
122 static int mount_add_mount_links(Mount *m) {
129 if (m->from_fragment)
130 pm = &m->parameters_fragment;
131 else if (m->from_etc_fstab)
132 pm = &m->parameters_etc_fstab;
136 /* Adds in links to other mount points that might lie below or
137 * above us in the hierarchy */
139 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
140 Mount *n = (Mount*) other;
146 if (n->meta.load_state != UNIT_LOADED)
149 if (n->from_fragment)
150 pn = &n->parameters_fragment;
151 else if (n->from_etc_fstab)
152 pn = &n->parameters_etc_fstab;
156 if (path_startswith(m->where, n->where)) {
158 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
161 if (n->from_etc_fstab || n->from_fragment)
162 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
165 } else if (path_startswith(n->where, m->where)) {
167 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
170 if (m->from_etc_fstab || m->from_fragment)
171 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
174 } else if (pm && path_startswith(pm->what, n->where)) {
176 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
179 if (m->from_etc_fstab || m->from_fragment)
180 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
183 } else if (pn && path_startswith(pn->what, m->where)) {
185 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
188 if (n->from_etc_fstab || n->from_fragment)
189 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
197 static int mount_add_swap_links(Mount *m) {
203 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
204 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
210 static int mount_add_path_links(Mount *m) {
216 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
217 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
223 static int mount_add_automount_links(Mount *m) {
229 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
230 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
236 static int mount_add_socket_links(Mount *m) {
242 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
243 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
249 static char* mount_test_option(const char *haystack, const char *needle) {
254 /* Like glibc's hasmntopt(), but works on a string, not a
261 me.mnt_opts = (char*) haystack;
263 return hasmntopt(&me, needle);
266 static int mount_add_target_links(Mount *m) {
267 const char *target, *after = NULL;
271 bool noauto, handle, automount;
275 if (m->from_fragment)
276 p = &m->parameters_fragment;
277 else if (m->from_etc_fstab)
278 p = &m->parameters_etc_fstab;
282 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
283 handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
284 m->meta.manager->mount_auto;
285 automount = !!mount_test_option(p->options, "comment=systemd.automount");
287 if (mount_test_option(p->options, "_netdev") ||
288 (p->fstype && fstype_is_network(p->fstype))) {
289 target = SPECIAL_REMOTE_FS_TARGET;
291 if (m->meta.manager->running_as == MANAGER_SYSTEM)
292 after = SPECIAL_NETWORK_TARGET;
294 target = SPECIAL_LOCAL_FS_TARGET;
296 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
300 if ((r = unit_add_dependency_by_name(tu, UNIT_AFTER, after, NULL, true)) < 0)
303 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
306 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
309 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
312 /* Automatically add mount points that aren't natively
313 * configured to local-fs.target */
317 m->meta.manager->running_as == MANAGER_SYSTEM)
318 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
321 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
325 static bool mount_is_bind(MountParameters *p) {
328 if (p->fstype && streq(p->fstype, "bind"))
331 if (mount_test_option(p->options, "bind"))
337 static int mount_add_device_links(Mount *m) {
343 if (m->from_fragment)
344 p = &m->parameters_fragment;
345 else if (m->from_etc_fstab)
346 p = &m->parameters_etc_fstab;
353 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
356 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
357 nofail = !!mount_test_option(p->options, "nofail");
359 if ((r = unit_add_node_link(UNIT(m), p->what,
361 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
366 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
367 !path_equal(m->where, "/")) {
370 /* Let's add in the fsck service */
372 /* aka SPECIAL_FSCK_SERVICE */
373 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
376 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
377 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
384 SERVICE(fsck)->fsck_passno = p->passno;
386 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
393 static int mount_add_default_dependencies(Mount *m) {
398 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
399 !path_equal(m->where, "/")) {
401 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0)
404 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
411 static int mount_verify(Mount *m) {
416 if (m->meta.load_state != UNIT_LOADED)
419 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
422 if (!(e = unit_name_from_path(m->where, ".mount")))
425 b = unit_has_name(UNIT(m), e);
429 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
433 if (m->meta.fragment_path && !m->parameters_fragment.what) {
434 log_error("%s's What setting is missing. Refusing.", m->meta.id);
438 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
439 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
446 static int mount_load(Unit *u) {
451 assert(u->meta.load_state == UNIT_STUB);
453 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
456 /* This is a new unit? Then let's add in some extras */
457 if (u->meta.load_state == UNIT_LOADED) {
458 if (m->meta.fragment_path)
459 m->from_fragment = true;
462 if (!(m->where = unit_name_to_path(u->meta.id)))
465 path_kill_slashes(m->where);
467 if (!m->meta.description)
468 if ((r = unit_set_description(u, m->where)) < 0)
471 if ((r = mount_add_device_links(m)) < 0)
474 if ((r = mount_add_mount_links(m)) < 0)
477 if ((r = mount_add_socket_links(m)) < 0)
480 if ((r = mount_add_swap_links(m)) < 0)
483 if ((r = mount_add_path_links(m)) < 0)
486 if ((r = mount_add_automount_links(m)) < 0)
489 if ((r = mount_add_target_links(m)) < 0)
492 if ((r = unit_add_default_cgroup(u)) < 0)
495 if (m->meta.default_dependencies)
496 if ((r = mount_add_default_dependencies(m)) < 0)
500 return mount_verify(m);
503 static int mount_notify_automount(Mount *m, int status) {
509 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
510 return r == -ENOENT ? 0 : r;
512 return automount_send_ready(AUTOMOUNT(p), status);
515 static void mount_set_state(Mount *m, MountState state) {
516 MountState old_state;
519 old_state = m->state;
522 if (state != MOUNT_MOUNTING &&
523 state != MOUNT_MOUNTING_DONE &&
524 state != MOUNT_REMOUNTING &&
525 state != MOUNT_UNMOUNTING &&
526 state != MOUNT_MOUNTING_SIGTERM &&
527 state != MOUNT_MOUNTING_SIGKILL &&
528 state != MOUNT_UNMOUNTING_SIGTERM &&
529 state != MOUNT_UNMOUNTING_SIGKILL &&
530 state != MOUNT_REMOUNTING_SIGTERM &&
531 state != MOUNT_REMOUNTING_SIGKILL) {
532 unit_unwatch_timer(UNIT(m), &m->timer_watch);
533 mount_unwatch_control_pid(m);
534 m->control_command = NULL;
535 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
538 if (state == MOUNT_MOUNTED ||
539 state == MOUNT_REMOUNTING)
540 mount_notify_automount(m, 0);
541 else if (state == MOUNT_DEAD ||
542 state == MOUNT_UNMOUNTING ||
543 state == MOUNT_MOUNTING_SIGTERM ||
544 state == MOUNT_MOUNTING_SIGKILL ||
545 state == MOUNT_REMOUNTING_SIGTERM ||
546 state == MOUNT_REMOUNTING_SIGKILL ||
547 state == MOUNT_UNMOUNTING_SIGTERM ||
548 state == MOUNT_UNMOUNTING_SIGKILL ||
549 state == MOUNT_FAILED)
550 mount_notify_automount(m, -ENODEV);
552 if (state != old_state)
553 log_debug("%s changed %s -> %s",
555 mount_state_to_string(old_state),
556 mount_state_to_string(state));
558 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
561 static int mount_coldplug(Unit *u) {
563 MountState new_state = MOUNT_DEAD;
567 assert(m->state == MOUNT_DEAD);
569 if (m->deserialized_state != m->state)
570 new_state = m->deserialized_state;
571 else if (m->from_proc_self_mountinfo)
572 new_state = MOUNT_MOUNTED;
574 if (new_state != m->state) {
576 if (new_state == MOUNT_MOUNTING ||
577 new_state == MOUNT_MOUNTING_DONE ||
578 new_state == MOUNT_REMOUNTING ||
579 new_state == MOUNT_UNMOUNTING ||
580 new_state == MOUNT_MOUNTING_SIGTERM ||
581 new_state == MOUNT_MOUNTING_SIGKILL ||
582 new_state == MOUNT_UNMOUNTING_SIGTERM ||
583 new_state == MOUNT_UNMOUNTING_SIGKILL ||
584 new_state == MOUNT_REMOUNTING_SIGTERM ||
585 new_state == MOUNT_REMOUNTING_SIGKILL) {
587 if (m->control_pid <= 0)
590 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
593 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
597 mount_set_state(m, new_state);
603 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
610 if (m->from_proc_self_mountinfo)
611 p = &m->parameters_proc_self_mountinfo;
612 else if (m->from_fragment)
613 p = &m->parameters_fragment;
615 p = &m->parameters_etc_fstab;
618 "%sMount State: %s\n"
621 "%sFile System Type: %s\n"
623 "%sFrom /etc/fstab: %s\n"
624 "%sFrom /proc/self/mountinfo: %s\n"
625 "%sFrom fragment: %s\n"
626 "%sDirectoryMode: %04o\n",
627 prefix, mount_state_to_string(m->state),
629 prefix, strna(p->what),
630 prefix, strna(p->fstype),
631 prefix, strna(p->options),
632 prefix, yes_no(m->from_etc_fstab),
633 prefix, yes_no(m->from_proc_self_mountinfo),
634 prefix, yes_no(m->from_fragment),
635 prefix, m->directory_mode);
637 if (m->control_pid > 0)
639 "%sControl PID: %lu\n",
640 prefix, (unsigned long) m->control_pid);
642 exec_context_dump(&m->exec_context, f, prefix);
645 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
653 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
656 if ((r = exec_spawn(c,
660 m->meta.manager->environment,
664 m->meta.manager->confirm_spawn,
665 m->meta.cgroup_bondings,
669 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
670 /* FIXME: we need to do something here */
678 unit_unwatch_timer(UNIT(m), &m->timer_watch);
683 static void mount_enter_dead(Mount *m, bool success) {
689 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
692 static void mount_enter_mounted(Mount *m, bool success) {
698 mount_set_state(m, MOUNT_MOUNTED);
701 static void mount_enter_signal(Mount *m, MountState state, bool success) {
704 bool wait_for_exit = false;
711 if (m->exec_context.kill_mode != KILL_NONE) {
712 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
713 state == MOUNT_UNMOUNTING_SIGTERM ||
714 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
716 if (m->control_pid > 0) {
717 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
719 m->control_pid, sig) < 0 && errno != ESRCH)
721 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
723 wait_for_exit = true;
726 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
728 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
733 /* Exclude the control pid from being killed via the cgroup */
734 if (m->control_pid > 0)
735 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
738 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
739 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
740 log_warning("Failed to kill control group: %s", strerror(-r));
742 wait_for_exit = true;
749 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
752 mount_set_state(m, state);
753 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
754 mount_enter_mounted(m, true);
756 mount_enter_dead(m, true);
761 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
763 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
764 mount_enter_mounted(m, false);
766 mount_enter_dead(m, false);
772 static void mount_enter_unmounting(Mount *m, bool success) {
780 m->control_command_id = MOUNT_EXEC_UNMOUNT;
781 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
783 if ((r = exec_command_set(
790 mount_unwatch_control_pid(m);
792 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
795 mount_set_state(m, MOUNT_UNMOUNTING);
800 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
801 mount_enter_mounted(m, false);
804 static void mount_enter_mounting(Mount *m) {
809 m->control_command_id = MOUNT_EXEC_MOUNT;
810 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
812 mkdir_p(m->where, m->directory_mode);
814 if (m->from_fragment)
815 r = exec_command_set(
818 m->parameters_fragment.what,
820 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
821 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
823 else if (m->from_etc_fstab)
824 r = exec_command_set(
835 mount_unwatch_control_pid(m);
837 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
840 mount_set_state(m, MOUNT_MOUNTING);
845 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
846 mount_enter_dead(m, false);
849 static void mount_enter_mounting_done(Mount *m) {
852 mount_set_state(m, MOUNT_MOUNTING_DONE);
855 static void mount_enter_remounting(Mount *m, bool success) {
863 m->control_command_id = MOUNT_EXEC_REMOUNT;
864 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
866 if (m->from_fragment) {
870 if (m->parameters_fragment.options) {
871 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
880 r = exec_command_set(
883 m->parameters_fragment.what,
885 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
890 } else if (m->from_etc_fstab)
891 r = exec_command_set(
903 mount_unwatch_control_pid(m);
905 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
908 mount_set_state(m, MOUNT_REMOUNTING);
913 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
914 mount_enter_mounted(m, false);
917 static int mount_start(Unit *u) {
922 /* We cannot fulfill this request right now, try again later
924 if (m->state == MOUNT_UNMOUNTING ||
925 m->state == MOUNT_UNMOUNTING_SIGTERM ||
926 m->state == MOUNT_UNMOUNTING_SIGKILL ||
927 m->state == MOUNT_MOUNTING_SIGTERM ||
928 m->state == MOUNT_MOUNTING_SIGKILL)
932 if (m->state == MOUNT_MOUNTING)
935 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
938 mount_enter_mounting(m);
942 static int mount_stop(Unit *u) {
948 if (m->state == MOUNT_UNMOUNTING ||
949 m->state == MOUNT_UNMOUNTING_SIGKILL ||
950 m->state == MOUNT_UNMOUNTING_SIGTERM ||
951 m->state == MOUNT_MOUNTING_SIGTERM ||
952 m->state == MOUNT_MOUNTING_SIGKILL)
955 assert(m->state == MOUNT_MOUNTING ||
956 m->state == MOUNT_MOUNTING_DONE ||
957 m->state == MOUNT_MOUNTED ||
958 m->state == MOUNT_REMOUNTING ||
959 m->state == MOUNT_REMOUNTING_SIGTERM ||
960 m->state == MOUNT_REMOUNTING_SIGKILL);
962 mount_enter_unmounting(m, true);
966 static int mount_reload(Unit *u) {
971 if (m->state == MOUNT_MOUNTING_DONE)
974 assert(m->state == MOUNT_MOUNTED);
976 mount_enter_remounting(m, true);
980 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
987 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
988 unit_serialize_item(u, f, "failure", yes_no(m->failure));
990 if (m->control_pid > 0)
991 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
993 if (m->control_command_id >= 0)
994 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
999 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1000 Mount *m = MOUNT(u);
1007 if (streq(key, "state")) {
1010 if ((state = mount_state_from_string(value)) < 0)
1011 log_debug("Failed to parse state value %s", value);
1013 m->deserialized_state = state;
1014 } else if (streq(key, "failure")) {
1017 if ((b = parse_boolean(value)) < 0)
1018 log_debug("Failed to parse failure value %s", value);
1020 m->failure = b || m->failure;
1022 } else if (streq(key, "control-pid")) {
1025 if (parse_pid(value, &pid) < 0)
1026 log_debug("Failed to parse control-pid value %s", value);
1028 m->control_pid = pid;
1029 } else if (streq(key, "control-command")) {
1030 MountExecCommand id;
1032 if ((id = mount_exec_command_from_string(value)) < 0)
1033 log_debug("Failed to parse exec-command value %s", value);
1035 m->control_command_id = id;
1036 m->control_command = m->exec_command + id;
1040 log_debug("Unknown serialization key '%s'", key);
1045 static UnitActiveState mount_active_state(Unit *u) {
1048 return state_translation_table[MOUNT(u)->state];
1051 static const char *mount_sub_state_to_string(Unit *u) {
1054 return mount_state_to_string(MOUNT(u)->state);
1057 static bool mount_check_gc(Unit *u) {
1058 Mount *m = MOUNT(u);
1062 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1065 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1066 Mount *m = MOUNT(u);
1072 if (pid != m->control_pid)
1077 success = is_clean_exit(code, status);
1078 m->failure = m->failure || !success;
1080 if (m->control_command) {
1081 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1082 m->control_command = NULL;
1083 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1086 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1087 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1089 /* Note that mount(8) returning and the kernel sending us a
1090 * mount table change event might happen out-of-order. If an
1091 * operation succeed we assume the kernel will follow soon too
1092 * and already change into the resulting state. If it fails
1093 * we check if the kernel still knows about the mount. and
1094 * change state accordingly. */
1098 case MOUNT_MOUNTING:
1099 case MOUNT_MOUNTING_DONE:
1100 case MOUNT_MOUNTING_SIGKILL:
1101 case MOUNT_MOUNTING_SIGTERM:
1102 case MOUNT_REMOUNTING:
1103 case MOUNT_REMOUNTING_SIGKILL:
1104 case MOUNT_REMOUNTING_SIGTERM:
1107 mount_enter_mounted(m, true);
1108 else if (m->from_proc_self_mountinfo)
1109 mount_enter_mounted(m, false);
1111 mount_enter_dead(m, false);
1114 case MOUNT_UNMOUNTING:
1115 case MOUNT_UNMOUNTING_SIGKILL:
1116 case MOUNT_UNMOUNTING_SIGTERM:
1119 mount_enter_dead(m, true);
1120 else if (m->from_proc_self_mountinfo)
1121 mount_enter_mounted(m, false);
1123 mount_enter_dead(m, false);
1127 assert_not_reached("Uh, control process died at wrong time.");
1130 /* Notify clients about changed exit status */
1131 unit_add_to_dbus_queue(u);
1134 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1135 Mount *m = MOUNT(u);
1138 assert(elapsed == 1);
1139 assert(w == &m->timer_watch);
1143 case MOUNT_MOUNTING:
1144 case MOUNT_MOUNTING_DONE:
1145 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1146 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1149 case MOUNT_REMOUNTING:
1150 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1151 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1154 case MOUNT_UNMOUNTING:
1155 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1156 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1159 case MOUNT_MOUNTING_SIGTERM:
1160 log_warning("%s mounting timed out. Killing.", u->meta.id);
1161 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1164 case MOUNT_REMOUNTING_SIGTERM:
1165 log_warning("%s remounting timed out. Killing.", u->meta.id);
1166 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1169 case MOUNT_UNMOUNTING_SIGTERM:
1170 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1171 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1174 case MOUNT_MOUNTING_SIGKILL:
1175 case MOUNT_REMOUNTING_SIGKILL:
1176 case MOUNT_UNMOUNTING_SIGKILL:
1177 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1179 if (m->from_proc_self_mountinfo)
1180 mount_enter_mounted(m, false);
1182 mount_enter_dead(m, false);
1186 assert_not_reached("Timeout at wrong time.");
1190 static int mount_add_one(
1194 const char *options,
1197 bool from_proc_self_mountinfo,
1202 char *e, *w = NULL, *o = NULL, *f = NULL;
1211 assert(!set_flags || from_proc_self_mountinfo);
1213 /* Ignore API mount points. They should never be referenced in
1214 * dependencies ever. */
1215 if (mount_point_is_api(where))
1218 if (streq(fstype, "autofs"))
1221 /* probably some kind of swap, ignore */
1222 if (!is_path(where))
1225 if (!(e = unit_name_from_path(where, ".mount")))
1228 if (!(u = manager_get_unit(m, e))) {
1231 if (!(u = unit_new(m))) {
1236 r = unit_add_name(u, e);
1242 if (!(MOUNT(u)->where = strdup(where))) {
1247 unit_add_to_load_queue(u);
1253 if (!(w = strdup(what)) ||
1254 !(o = strdup(options)) ||
1255 !(f = strdup(fstype))) {
1260 if (from_proc_self_mountinfo) {
1261 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1264 MOUNT(u)->is_mounted = true;
1265 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1266 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1269 MOUNT(u)->from_proc_self_mountinfo = true;
1271 p = &MOUNT(u)->parameters_etc_fstab;
1272 MOUNT(u)->from_etc_fstab = true;
1286 unit_add_to_dbus_queue(u);
1301 static char *fstab_node_to_udev_node(char *p) {
1305 /* FIXME: to follow udev's logic 100% we need to leave valid
1306 * UTF8 chars unescaped */
1308 if (startswith(p, "LABEL=")) {
1310 if (!(u = unquote(p+6, "\"\'")))
1313 t = xescape(u, "/ ");
1319 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1328 if (startswith(p, "UUID=")) {
1330 if (!(u = unquote(p+5, "\"\'")))
1333 t = xescape(u, "/ ");
1339 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1351 static int mount_find_pri(char *options) {
1355 if (!(pri = mount_test_option(options, "pri=")))
1361 r = strtoul(pri, &end, 10);
1366 if (end == pri || (*end != ',' && *end != 0))
1372 static int mount_load_etc_fstab(Manager *m) {
1380 if (!(f = setmntent("/etc/fstab", "r")))
1383 while ((me = getmntent(f))) {
1387 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1392 if (!(where = strdup(me->mnt_dir))) {
1399 path_kill_slashes(what);
1401 if (where[0] == '/')
1402 path_kill_slashes(where);
1404 if (streq(me->mnt_type, "swap")) {
1407 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1414 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1415 !!mount_test_option(me->mnt_opts, "nofail"),
1416 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1419 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1434 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1437 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1441 rewind(m->proc_self_mountinfo);
1446 device = path = options = options2 = fstype = d = p = o = NULL;
1448 if ((k = fscanf(m->proc_self_mountinfo,
1449 "%*s " /* (1) mount id */
1450 "%*s " /* (2) parent id */
1451 "%*s " /* (3) major:minor */
1452 "%*s " /* (4) root */
1453 "%ms " /* (5) mount point */
1454 "%ms" /* (6) mount options */
1455 "%*[^-]" /* (7) optional fields */
1456 "- " /* (8) separator */
1457 "%ms " /* (9) file system type */
1458 "%ms" /* (10) mount source */
1459 "%ms" /* (11) mount options 2 */
1460 "%*[^\n]", /* some rubbish at the end */
1470 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1474 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1479 if (!(d = cunescape(device)) ||
1480 !(p = cunescape(path))) {
1485 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1512 static void mount_shutdown(Manager *m) {
1515 if (m->proc_self_mountinfo) {
1516 fclose(m->proc_self_mountinfo);
1517 m->proc_self_mountinfo = NULL;
1521 static int mount_enumerate(Manager *m) {
1523 struct epoll_event ev;
1526 if (!m->proc_self_mountinfo) {
1527 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1530 m->mount_watch.type = WATCH_MOUNT;
1531 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1534 ev.events = EPOLLPRI;
1535 ev.data.ptr = &m->mount_watch;
1537 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1541 if ((r = mount_load_etc_fstab(m)) < 0)
1544 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1554 void mount_fd_event(Manager *m, int events) {
1559 assert(events & EPOLLPRI);
1561 /* The manager calls this for every fd event happening on the
1562 * /proc/self/mountinfo file, which informs us about mounting
1565 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1566 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1568 /* Reset flags, just in case, for later calls */
1569 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1570 Mount *mount = (Mount*) meta;
1572 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1578 manager_dispatch_load_queue(m);
1580 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1581 Mount *mount = (Mount*) meta;
1583 if (!mount->is_mounted) {
1584 /* This has just been unmounted. */
1586 mount->from_proc_self_mountinfo = false;
1588 switch (mount->state) {
1591 mount_enter_dead(mount, true);
1595 mount_set_state(mount, mount->state);
1600 } else if (mount->just_mounted || mount->just_changed) {
1602 /* New or changed mount entry */
1604 switch (mount->state) {
1608 mount_enter_mounted(mount, true);
1611 case MOUNT_MOUNTING:
1612 mount_enter_mounting_done(mount);
1616 /* Nothing really changed, but let's
1617 * issue an notification call
1618 * nonetheless, in case somebody is
1619 * waiting for this. (e.g. file system
1620 * ro/rw remounts.) */
1621 mount_set_state(mount, mount->state);
1626 /* Reset the flags for later calls */
1627 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1631 static void mount_reset_failed(Unit *u) {
1632 Mount *m = MOUNT(u);
1636 if (m->state == MOUNT_FAILED)
1637 mount_set_state(m, MOUNT_DEAD);
1642 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1643 Mount *m = MOUNT(u);
1645 Set *pid_set = NULL;
1649 if (who == KILL_MAIN) {
1650 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1654 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1655 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1659 if (m->control_pid > 0)
1660 if (kill(mode == KILL_PROCESS_GROUP ? -m->control_pid : m->control_pid, signo) < 0)
1663 if (mode == KILL_CONTROL_GROUP) {
1666 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1669 /* Exclude the control pid from being killed via the cgroup */
1670 if (m->control_pid > 0)
1671 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1676 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, pid_set)) < 0)
1677 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1688 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1689 [MOUNT_DEAD] = "dead",
1690 [MOUNT_MOUNTING] = "mounting",
1691 [MOUNT_MOUNTING_DONE] = "mounting-done",
1692 [MOUNT_MOUNTED] = "mounted",
1693 [MOUNT_REMOUNTING] = "remounting",
1694 [MOUNT_UNMOUNTING] = "unmounting",
1695 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1696 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1697 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1698 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1699 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1700 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1701 [MOUNT_FAILED] = "failed"
1704 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1706 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1707 [MOUNT_EXEC_MOUNT] = "ExecMount",
1708 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1709 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1712 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1714 const UnitVTable mount_vtable = {
1718 .no_instances = true,
1720 .show_status = true,
1726 .coldplug = mount_coldplug,
1730 .start = mount_start,
1732 .reload = mount_reload,
1736 .serialize = mount_serialize,
1737 .deserialize_item = mount_deserialize_item,
1739 .active_state = mount_active_state,
1740 .sub_state_to_string = mount_sub_state_to_string,
1742 .check_gc = mount_check_gc,
1744 .sigchld_event = mount_sigchld_event,
1745 .timer_event = mount_timer_event,
1747 .reset_failed = mount_reset_failed,
1749 .bus_interface = "org.freedesktop.systemd1.Mount",
1750 .bus_message_handler = bus_mount_message_handler,
1751 .bus_invalidating_properties = bus_mount_invalidating_properties,
1753 .enumerate = mount_enumerate,
1754 .shutdown = mount_shutdown