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 m->timer_watch.type = WATCH_INVALID;
75 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
78 static void mount_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 mount_unwatch_control_pid(m);
116 unit_unwatch_timer(u, &m->timer_watch);
119 static int mount_add_mount_links(Mount *m) {
126 if (m->from_fragment)
127 pm = &m->parameters_fragment;
128 else if (m->from_etc_fstab)
129 pm = &m->parameters_etc_fstab;
133 /* Adds in links to other mount points that might lie below or
134 * above us in the hierarchy */
136 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
137 Mount *n = (Mount*) other;
143 if (n->meta.load_state != UNIT_LOADED)
146 if (n->from_fragment)
147 pn = &n->parameters_fragment;
148 else if (n->from_etc_fstab)
149 pn = &n->parameters_etc_fstab;
153 if (path_startswith(m->where, n->where)) {
155 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
158 if (n->from_etc_fstab || n->from_fragment)
159 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
162 } else if (path_startswith(n->where, m->where)) {
164 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
167 if (m->from_etc_fstab || m->from_fragment)
168 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
171 } else if (pm && path_startswith(pm->what, n->where)) {
173 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
176 if (m->from_etc_fstab || m->from_fragment)
177 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
180 } else if (pn && path_startswith(pn->what, m->where)) {
182 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
185 if (n->from_etc_fstab || n->from_fragment)
186 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
194 static int mount_add_swap_links(Mount *m) {
200 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
201 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
207 static int mount_add_path_links(Mount *m) {
213 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
214 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
220 static int mount_add_automount_links(Mount *m) {
226 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
227 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
233 static int mount_add_socket_links(Mount *m) {
239 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
240 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
246 static char* mount_test_option(const char *haystack, const char *needle) {
251 /* Like glibc's hasmntopt(), but works on a string, not a
258 me.mnt_opts = (char*) haystack;
260 return hasmntopt(&me, needle);
263 static int mount_add_target_links(Mount *m) {
264 const char *target, *after = NULL;
268 bool noauto, handle, automount, user;
272 if (m->from_fragment)
273 p = &m->parameters_fragment;
274 else if (m->from_etc_fstab)
275 p = &m->parameters_etc_fstab;
279 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
280 user = mount_test_option(p->options, "user") || mount_test_option(p->options, "users");
281 handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
282 m->meta.manager->mount_auto;
283 automount = !!mount_test_option(p->options, "comment=systemd.automount");
285 if (mount_test_option(p->options, "_netdev") ||
286 (p->fstype && fstype_is_network(p->fstype))) {
287 target = SPECIAL_REMOTE_FS_TARGET;
289 if (m->meta.manager->running_as == MANAGER_SYSTEM)
290 after = SPECIAL_NETWORK_TARGET;
292 target = SPECIAL_LOCAL_FS_TARGET;
294 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
298 if ((r = unit_add_dependency_by_name(tu, UNIT_AFTER, after, NULL, true)) < 0)
301 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
304 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
307 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
310 /* Automatically add mount points that aren't natively
311 * configured to local-fs.target */
315 if (user || m->meta.manager->running_as == MANAGER_SYSTEM)
316 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
319 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
323 static bool mount_is_bind(MountParameters *p) {
326 if (p->fstype && streq(p->fstype, "bind"))
329 if (mount_test_option(p->options, "bind"))
335 static int mount_add_device_links(Mount *m) {
341 if (m->from_fragment)
342 p = &m->parameters_fragment;
343 else if (m->from_etc_fstab)
344 p = &m->parameters_etc_fstab;
351 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
354 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
355 nofail = !!mount_test_option(p->options, "nofail");
357 if ((r = unit_add_node_link(UNIT(m), p->what,
359 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
364 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
365 !path_equal(m->where, "/")) {
368 /* Let's add in the fsck service */
370 /* aka SPECIAL_FSCK_SERVICE */
371 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
374 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
375 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
382 SERVICE(fsck)->fsck_passno = p->passno;
384 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
391 static int mount_add_default_dependencies(Mount *m) {
396 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
397 !path_equal(m->where, "/")) {
399 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0)
402 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
409 static int mount_verify(Mount *m) {
414 if (m->meta.load_state != UNIT_LOADED)
417 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
420 if (!(e = unit_name_from_path(m->where, ".mount")))
423 b = unit_has_name(UNIT(m), e);
427 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
431 if (m->meta.fragment_path && !m->parameters_fragment.what) {
432 log_error("%s's What setting is missing. Refusing.", m->meta.id);
436 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
437 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
444 static int mount_load(Unit *u) {
449 assert(u->meta.load_state == UNIT_STUB);
451 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
454 /* This is a new unit? Then let's add in some extras */
455 if (u->meta.load_state == UNIT_LOADED) {
456 if (m->meta.fragment_path)
457 m->from_fragment = true;
460 if (!(m->where = unit_name_to_path(u->meta.id)))
463 path_kill_slashes(m->where);
465 if (!m->meta.description)
466 if ((r = unit_set_description(u, m->where)) < 0)
469 if ((r = mount_add_device_links(m)) < 0)
472 if ((r = mount_add_mount_links(m)) < 0)
475 if ((r = mount_add_socket_links(m)) < 0)
478 if ((r = mount_add_swap_links(m)) < 0)
481 if ((r = mount_add_path_links(m)) < 0)
484 if ((r = mount_add_automount_links(m)) < 0)
487 if ((r = mount_add_target_links(m)) < 0)
490 if ((r = unit_add_default_cgroup(u)) < 0)
493 if (m->meta.default_dependencies)
494 if ((r = mount_add_default_dependencies(m)) < 0)
498 return mount_verify(m);
501 static int mount_notify_automount(Mount *m, int status) {
507 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
508 return r == -ENOENT ? 0 : r;
510 return automount_send_ready(AUTOMOUNT(p), status);
513 static void mount_set_state(Mount *m, MountState state) {
514 MountState old_state;
517 old_state = m->state;
520 if (state != MOUNT_MOUNTING &&
521 state != MOUNT_MOUNTING_DONE &&
522 state != MOUNT_REMOUNTING &&
523 state != MOUNT_UNMOUNTING &&
524 state != MOUNT_MOUNTING_SIGTERM &&
525 state != MOUNT_MOUNTING_SIGKILL &&
526 state != MOUNT_UNMOUNTING_SIGTERM &&
527 state != MOUNT_UNMOUNTING_SIGKILL &&
528 state != MOUNT_REMOUNTING_SIGTERM &&
529 state != MOUNT_REMOUNTING_SIGKILL) {
530 unit_unwatch_timer(UNIT(m), &m->timer_watch);
531 mount_unwatch_control_pid(m);
532 m->control_command = NULL;
533 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
536 if (state == MOUNT_MOUNTED ||
537 state == MOUNT_REMOUNTING)
538 mount_notify_automount(m, 0);
539 else if (state == MOUNT_DEAD ||
540 state == MOUNT_UNMOUNTING ||
541 state == MOUNT_MOUNTING_SIGTERM ||
542 state == MOUNT_MOUNTING_SIGKILL ||
543 state == MOUNT_REMOUNTING_SIGTERM ||
544 state == MOUNT_REMOUNTING_SIGKILL ||
545 state == MOUNT_UNMOUNTING_SIGTERM ||
546 state == MOUNT_UNMOUNTING_SIGKILL ||
547 state == MOUNT_FAILED)
548 mount_notify_automount(m, -ENODEV);
550 if (state != old_state)
551 log_debug("%s changed %s -> %s",
553 mount_state_to_string(old_state),
554 mount_state_to_string(state));
556 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
559 static int mount_coldplug(Unit *u) {
561 MountState new_state = MOUNT_DEAD;
565 assert(m->state == MOUNT_DEAD);
567 if (m->deserialized_state != m->state)
568 new_state = m->deserialized_state;
569 else if (m->from_proc_self_mountinfo)
570 new_state = MOUNT_MOUNTED;
572 if (new_state != m->state) {
574 if (new_state == MOUNT_MOUNTING ||
575 new_state == MOUNT_MOUNTING_DONE ||
576 new_state == MOUNT_REMOUNTING ||
577 new_state == MOUNT_UNMOUNTING ||
578 new_state == MOUNT_MOUNTING_SIGTERM ||
579 new_state == MOUNT_MOUNTING_SIGKILL ||
580 new_state == MOUNT_UNMOUNTING_SIGTERM ||
581 new_state == MOUNT_UNMOUNTING_SIGKILL ||
582 new_state == MOUNT_REMOUNTING_SIGTERM ||
583 new_state == MOUNT_REMOUNTING_SIGKILL) {
585 if (m->control_pid <= 0)
588 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
591 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
595 mount_set_state(m, new_state);
601 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
608 if (m->from_proc_self_mountinfo)
609 p = &m->parameters_proc_self_mountinfo;
610 else if (m->from_fragment)
611 p = &m->parameters_fragment;
613 p = &m->parameters_etc_fstab;
616 "%sMount State: %s\n"
619 "%sFile System Type: %s\n"
621 "%sFrom /etc/fstab: %s\n"
622 "%sFrom /proc/self/mountinfo: %s\n"
623 "%sFrom fragment: %s\n"
624 "%sDirectoryMode: %04o\n",
625 prefix, mount_state_to_string(m->state),
627 prefix, strna(p->what),
628 prefix, strna(p->fstype),
629 prefix, strna(p->options),
630 prefix, yes_no(m->from_etc_fstab),
631 prefix, yes_no(m->from_proc_self_mountinfo),
632 prefix, yes_no(m->from_fragment),
633 prefix, m->directory_mode);
635 if (m->control_pid > 0)
637 "%sControl PID: %lu\n",
638 prefix, (unsigned long) m->control_pid);
640 exec_context_dump(&m->exec_context, f, prefix);
643 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
651 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
654 if ((r = exec_spawn(c,
658 m->meta.manager->environment,
662 m->meta.manager->confirm_spawn,
663 m->meta.cgroup_bondings,
667 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
668 /* FIXME: we need to do something here */
676 unit_unwatch_timer(UNIT(m), &m->timer_watch);
681 static void mount_enter_dead(Mount *m, bool success) {
687 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
690 static void mount_enter_mounted(Mount *m, bool success) {
696 mount_set_state(m, MOUNT_MOUNTED);
699 static void mount_enter_signal(Mount *m, MountState state, bool success) {
702 bool wait_for_exit = false;
709 if (m->exec_context.kill_mode != KILL_NONE) {
710 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
711 state == MOUNT_UNMOUNTING_SIGTERM ||
712 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
714 if (m->control_pid > 0) {
715 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
717 m->control_pid, sig) < 0 && errno != ESRCH)
719 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
721 wait_for_exit = true;
724 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
726 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
731 /* Exclude the control pid from being killed via the cgroup */
732 if (m->control_pid > 0)
733 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
736 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
737 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
738 log_warning("Failed to kill control group: %s", strerror(-r));
740 wait_for_exit = true;
747 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
750 mount_set_state(m, state);
751 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
752 mount_enter_mounted(m, true);
754 mount_enter_dead(m, true);
759 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
761 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
762 mount_enter_mounted(m, false);
764 mount_enter_dead(m, false);
770 static void mount_enter_unmounting(Mount *m, bool success) {
778 m->control_command_id = MOUNT_EXEC_UNMOUNT;
779 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
781 if ((r = exec_command_set(
788 mount_unwatch_control_pid(m);
790 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
793 mount_set_state(m, MOUNT_UNMOUNTING);
798 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
799 mount_enter_mounted(m, false);
802 static void mount_enter_mounting(Mount *m) {
807 m->control_command_id = MOUNT_EXEC_MOUNT;
808 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
810 mkdir_p(m->where, m->directory_mode);
812 if (m->from_fragment)
813 r = exec_command_set(
816 m->parameters_fragment.what,
818 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
819 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
821 else if (m->from_etc_fstab)
822 r = exec_command_set(
833 mount_unwatch_control_pid(m);
835 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
838 mount_set_state(m, MOUNT_MOUNTING);
843 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
844 mount_enter_dead(m, false);
847 static void mount_enter_mounting_done(Mount *m) {
850 mount_set_state(m, MOUNT_MOUNTING_DONE);
853 static void mount_enter_remounting(Mount *m, bool success) {
861 m->control_command_id = MOUNT_EXEC_REMOUNT;
862 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
864 if (m->from_fragment) {
868 if (m->parameters_fragment.options) {
869 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
878 r = exec_command_set(
881 m->parameters_fragment.what,
883 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
888 } else if (m->from_etc_fstab)
889 r = exec_command_set(
901 mount_unwatch_control_pid(m);
903 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
906 mount_set_state(m, MOUNT_REMOUNTING);
911 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
912 mount_enter_mounted(m, false);
915 static int mount_start(Unit *u) {
920 /* We cannot fulfill this request right now, try again later
922 if (m->state == MOUNT_UNMOUNTING ||
923 m->state == MOUNT_UNMOUNTING_SIGTERM ||
924 m->state == MOUNT_UNMOUNTING_SIGKILL ||
925 m->state == MOUNT_MOUNTING_SIGTERM ||
926 m->state == MOUNT_MOUNTING_SIGKILL)
930 if (m->state == MOUNT_MOUNTING)
933 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
936 mount_enter_mounting(m);
940 static int mount_stop(Unit *u) {
946 if (m->state == MOUNT_UNMOUNTING ||
947 m->state == MOUNT_UNMOUNTING_SIGKILL ||
948 m->state == MOUNT_UNMOUNTING_SIGTERM ||
949 m->state == MOUNT_MOUNTING_SIGTERM ||
950 m->state == MOUNT_MOUNTING_SIGKILL)
953 assert(m->state == MOUNT_MOUNTING ||
954 m->state == MOUNT_MOUNTING_DONE ||
955 m->state == MOUNT_MOUNTED ||
956 m->state == MOUNT_REMOUNTING ||
957 m->state == MOUNT_REMOUNTING_SIGTERM ||
958 m->state == MOUNT_REMOUNTING_SIGKILL);
960 mount_enter_unmounting(m, true);
964 static int mount_reload(Unit *u) {
969 if (m->state == MOUNT_MOUNTING_DONE)
972 assert(m->state == MOUNT_MOUNTED);
974 mount_enter_remounting(m, true);
978 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
985 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
986 unit_serialize_item(u, f, "failure", yes_no(m->failure));
988 if (m->control_pid > 0)
989 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
991 if (m->control_command_id >= 0)
992 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
997 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1005 if (streq(key, "state")) {
1008 if ((state = mount_state_from_string(value)) < 0)
1009 log_debug("Failed to parse state value %s", value);
1011 m->deserialized_state = state;
1012 } else if (streq(key, "failure")) {
1015 if ((b = parse_boolean(value)) < 0)
1016 log_debug("Failed to parse failure value %s", value);
1018 m->failure = b || m->failure;
1020 } else if (streq(key, "control-pid")) {
1023 if (parse_pid(value, &pid) < 0)
1024 log_debug("Failed to parse control-pid value %s", value);
1026 m->control_pid = pid;
1027 } else if (streq(key, "control-command")) {
1028 MountExecCommand id;
1030 if ((id = mount_exec_command_from_string(value)) < 0)
1031 log_debug("Failed to parse exec-command value %s", value);
1033 m->control_command_id = id;
1034 m->control_command = m->exec_command + id;
1038 log_debug("Unknown serialization key '%s'", key);
1043 static UnitActiveState mount_active_state(Unit *u) {
1046 return state_translation_table[MOUNT(u)->state];
1049 static const char *mount_sub_state_to_string(Unit *u) {
1052 return mount_state_to_string(MOUNT(u)->state);
1055 static bool mount_check_gc(Unit *u) {
1056 Mount *m = MOUNT(u);
1060 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1063 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1064 Mount *m = MOUNT(u);
1070 if (pid != m->control_pid)
1075 success = is_clean_exit(code, status);
1076 m->failure = m->failure || !success;
1078 if (m->control_command) {
1079 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1080 m->control_command = NULL;
1081 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1084 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1085 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1087 /* Note that mount(8) returning and the kernel sending us a
1088 * mount table change event might happen out-of-order. If an
1089 * operation succeed we assume the kernel will follow soon too
1090 * and already change into the resulting state. If it fails
1091 * we check if the kernel still knows about the mount. and
1092 * change state accordingly. */
1096 case MOUNT_MOUNTING:
1097 case MOUNT_MOUNTING_DONE:
1098 case MOUNT_MOUNTING_SIGKILL:
1099 case MOUNT_MOUNTING_SIGTERM:
1100 case MOUNT_REMOUNTING:
1101 case MOUNT_REMOUNTING_SIGKILL:
1102 case MOUNT_REMOUNTING_SIGTERM:
1105 mount_enter_mounted(m, true);
1106 else if (m->from_proc_self_mountinfo)
1107 mount_enter_mounted(m, false);
1109 mount_enter_dead(m, false);
1112 case MOUNT_UNMOUNTING:
1113 case MOUNT_UNMOUNTING_SIGKILL:
1114 case MOUNT_UNMOUNTING_SIGTERM:
1117 mount_enter_dead(m, true);
1118 else if (m->from_proc_self_mountinfo)
1119 mount_enter_mounted(m, false);
1121 mount_enter_dead(m, false);
1125 assert_not_reached("Uh, control process died at wrong time.");
1128 /* Notify clients about changed exit status */
1129 unit_add_to_dbus_queue(u);
1132 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1133 Mount *m = MOUNT(u);
1136 assert(elapsed == 1);
1137 assert(w == &m->timer_watch);
1141 case MOUNT_MOUNTING:
1142 case MOUNT_MOUNTING_DONE:
1143 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1144 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1147 case MOUNT_REMOUNTING:
1148 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1149 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1152 case MOUNT_UNMOUNTING:
1153 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1154 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1157 case MOUNT_MOUNTING_SIGTERM:
1158 log_warning("%s mounting timed out. Killing.", u->meta.id);
1159 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1162 case MOUNT_REMOUNTING_SIGTERM:
1163 log_warning("%s remounting timed out. Killing.", u->meta.id);
1164 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1167 case MOUNT_UNMOUNTING_SIGTERM:
1168 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1169 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1172 case MOUNT_MOUNTING_SIGKILL:
1173 case MOUNT_REMOUNTING_SIGKILL:
1174 case MOUNT_UNMOUNTING_SIGKILL:
1175 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1177 if (m->from_proc_self_mountinfo)
1178 mount_enter_mounted(m, false);
1180 mount_enter_dead(m, false);
1184 assert_not_reached("Timeout at wrong time.");
1188 static int mount_add_one(
1192 const char *options,
1195 bool from_proc_self_mountinfo,
1200 char *e, *w = NULL, *o = NULL, *f = NULL;
1209 assert(!set_flags || from_proc_self_mountinfo);
1211 /* Ignore API mount points. They should never be referenced in
1212 * dependencies ever. */
1213 if (mount_point_is_api(where))
1216 if (streq(fstype, "autofs"))
1219 /* probably some kind of swap, ignore */
1220 if (!is_path(where))
1223 if (!(e = unit_name_from_path(where, ".mount")))
1226 if (!(u = manager_get_unit(m, e))) {
1229 if (!(u = unit_new(m))) {
1234 r = unit_add_name(u, e);
1240 if (!(MOUNT(u)->where = strdup(where))) {
1245 unit_add_to_load_queue(u);
1251 if (!(w = strdup(what)) ||
1252 !(o = strdup(options)) ||
1253 !(f = strdup(fstype))) {
1258 if (from_proc_self_mountinfo) {
1259 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1262 MOUNT(u)->is_mounted = true;
1263 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1264 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1267 MOUNT(u)->from_proc_self_mountinfo = true;
1269 p = &MOUNT(u)->parameters_etc_fstab;
1270 MOUNT(u)->from_etc_fstab = true;
1284 unit_add_to_dbus_queue(u);
1299 static char *fstab_node_to_udev_node(char *p) {
1303 /* FIXME: to follow udev's logic 100% we need to leave valid
1304 * UTF8 chars unescaped */
1306 if (startswith(p, "LABEL=")) {
1308 if (!(u = unquote(p+6, "\"\'")))
1311 t = xescape(u, "/ ");
1317 r = asprintf(&dn, "/dev/disk/by-label/%s", t);
1326 if (startswith(p, "UUID=")) {
1328 if (!(u = unquote(p+5, "\"\'")))
1331 t = xescape(u, "/ ");
1337 r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
1349 static int mount_find_pri(char *options) {
1353 if (!(pri = mount_test_option(options, "pri=")))
1359 r = strtoul(pri, &end, 10);
1364 if (end == pri || (*end != ',' && *end != 0))
1370 static int mount_load_etc_fstab(Manager *m) {
1378 if (!(f = setmntent("/etc/fstab", "r")))
1381 while ((me = getmntent(f))) {
1385 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1390 if (!(where = strdup(me->mnt_dir))) {
1397 path_kill_slashes(what);
1399 if (where[0] == '/')
1400 path_kill_slashes(where);
1402 if (streq(me->mnt_type, "swap")) {
1405 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1412 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1413 !!mount_test_option(me->mnt_opts, "nofail"),
1414 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1417 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1432 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1435 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1439 rewind(m->proc_self_mountinfo);
1444 device = path = options = options2 = fstype = d = p = o = NULL;
1446 if ((k = fscanf(m->proc_self_mountinfo,
1447 "%*s " /* (1) mount id */
1448 "%*s " /* (2) parent id */
1449 "%*s " /* (3) major:minor */
1450 "%*s " /* (4) root */
1451 "%ms " /* (5) mount point */
1452 "%ms" /* (6) mount options */
1453 "%*[^-]" /* (7) optional fields */
1454 "- " /* (8) separator */
1455 "%ms " /* (9) file system type */
1456 "%ms" /* (10) mount source */
1457 "%ms" /* (11) mount options 2 */
1458 "%*[^\n]", /* some rubbish at the end */
1468 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1472 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1477 if (!(d = cunescape(device)) ||
1478 !(p = cunescape(path))) {
1483 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1510 static void mount_shutdown(Manager *m) {
1513 if (m->proc_self_mountinfo) {
1514 fclose(m->proc_self_mountinfo);
1515 m->proc_self_mountinfo = NULL;
1519 static int mount_enumerate(Manager *m) {
1521 struct epoll_event ev;
1524 if (!m->proc_self_mountinfo) {
1525 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1528 m->mount_watch.type = WATCH_MOUNT;
1529 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1532 ev.events = EPOLLPRI;
1533 ev.data.ptr = &m->mount_watch;
1535 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1539 if ((r = mount_load_etc_fstab(m)) < 0)
1542 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1552 void mount_fd_event(Manager *m, int events) {
1557 assert(events & EPOLLPRI);
1559 /* The manager calls this for every fd event happening on the
1560 * /proc/self/mountinfo file, which informs us about mounting
1563 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1564 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1566 /* Reset flags, just in case, for later calls */
1567 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1568 Mount *mount = (Mount*) meta;
1570 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1576 manager_dispatch_load_queue(m);
1578 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1579 Mount *mount = (Mount*) meta;
1581 if (!mount->is_mounted) {
1582 /* This has just been unmounted. */
1584 mount->from_proc_self_mountinfo = false;
1586 switch (mount->state) {
1589 mount_enter_dead(mount, true);
1593 mount_set_state(mount, mount->state);
1598 } else if (mount->just_mounted || mount->just_changed) {
1600 /* New or changed mount entry */
1602 switch (mount->state) {
1606 mount_enter_mounted(mount, true);
1609 case MOUNT_MOUNTING:
1610 mount_enter_mounting_done(mount);
1614 /* Nothing really changed, but let's
1615 * issue an notification call
1616 * nonetheless, in case somebody is
1617 * waiting for this. (e.g. file system
1618 * ro/rw remounts.) */
1619 mount_set_state(mount, mount->state);
1624 /* Reset the flags for later calls */
1625 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1629 static void mount_reset_failed(Unit *u) {
1630 Mount *m = MOUNT(u);
1634 if (m->state == MOUNT_FAILED)
1635 mount_set_state(m, MOUNT_DEAD);
1640 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1641 Mount *m = MOUNT(u);
1643 Set *pid_set = NULL;
1647 if (who == KILL_MAIN) {
1648 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1652 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1653 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1657 if (m->control_pid > 0)
1658 if (kill(mode == KILL_PROCESS_GROUP ? -m->control_pid : m->control_pid, signo) < 0)
1661 if (mode == KILL_CONTROL_GROUP) {
1664 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1667 /* Exclude the control pid from being killed via the cgroup */
1668 if (m->control_pid > 0)
1669 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1674 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, pid_set)) < 0)
1675 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1686 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1687 [MOUNT_DEAD] = "dead",
1688 [MOUNT_MOUNTING] = "mounting",
1689 [MOUNT_MOUNTING_DONE] = "mounting-done",
1690 [MOUNT_MOUNTED] = "mounted",
1691 [MOUNT_REMOUNTING] = "remounting",
1692 [MOUNT_UNMOUNTING] = "unmounting",
1693 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1694 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1695 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1696 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1697 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1698 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1699 [MOUNT_FAILED] = "failed"
1702 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1704 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1705 [MOUNT_EXEC_MOUNT] = "ExecMount",
1706 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1707 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1710 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1712 const UnitVTable mount_vtable = {
1716 .no_instances = true,
1718 .show_status = true,
1724 .coldplug = mount_coldplug,
1728 .start = mount_start,
1730 .reload = mount_reload,
1734 .serialize = mount_serialize,
1735 .deserialize_item = mount_deserialize_item,
1737 .active_state = mount_active_state,
1738 .sub_state_to_string = mount_sub_state_to_string,
1740 .check_gc = mount_check_gc,
1742 .sigchld_event = mount_sigchld_event,
1743 .timer_event = mount_timer_event,
1745 .reset_failed = mount_reset_failed,
1747 .bus_interface = "org.freedesktop.systemd1.Mount",
1748 .bus_message_handler = bus_mount_message_handler,
1749 .bus_invalidating_properties = bus_mount_invalidating_properties,
1751 .enumerate = mount_enumerate,
1752 .shutdown = mount_shutdown