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"
39 #include "exit-status.h"
41 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
42 [MOUNT_DEAD] = UNIT_INACTIVE,
43 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
44 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
45 [MOUNT_MOUNTED] = UNIT_ACTIVE,
46 [MOUNT_REMOUNTING] = UNIT_RELOADING,
47 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
48 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
49 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
50 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
51 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
52 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
53 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
54 [MOUNT_FAILED] = UNIT_FAILED
57 static void mount_init(Unit *u) {
61 assert(u->meta.load_state == UNIT_STUB);
63 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
64 m->directory_mode = 0755;
66 exec_context_init(&m->exec_context);
67 m->exec_context.std_output = EXEC_OUTPUT_KMSG;
69 /* We need to make sure that /bin/mount is always called in
70 * the same process group as us, so that the autofs kernel
71 * side doesn't send us another mount request while we are
72 * already trying to comply its last one. */
73 m->exec_context.same_pgrp = true;
75 m->timer_watch.type = WATCH_INVALID;
77 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
80 static void mount_unwatch_control_pid(Mount *m) {
83 if (m->control_pid <= 0)
86 unit_unwatch_pid(UNIT(m), m->control_pid);
90 static void mount_parameters_done(MountParameters *p) {
97 p->what = p->options = p->fstype = NULL;
100 static void mount_done(Unit *u) {
109 /* Try to detach us from the automount unit if there is any */
110 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
111 Automount *a = (Automount*) other;
117 mount_parameters_done(&m->parameters_etc_fstab);
118 mount_parameters_done(&m->parameters_proc_self_mountinfo);
119 mount_parameters_done(&m->parameters_fragment);
121 exec_context_done(&m->exec_context);
122 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
123 m->control_command = NULL;
125 mount_unwatch_control_pid(m);
127 unit_unwatch_timer(u, &m->timer_watch);
130 static int mount_add_mount_links(Mount *m) {
137 if (m->from_fragment)
138 pm = &m->parameters_fragment;
139 else if (m->from_etc_fstab)
140 pm = &m->parameters_etc_fstab;
144 /* Adds in links to other mount points that might lie below or
145 * above us in the hierarchy */
147 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
148 Mount *n = (Mount*) other;
154 if (n->meta.load_state != UNIT_LOADED)
157 if (n->from_fragment)
158 pn = &n->parameters_fragment;
159 else if (n->from_etc_fstab)
160 pn = &n->parameters_etc_fstab;
164 if (path_startswith(m->where, n->where)) {
166 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
169 if (n->from_etc_fstab || n->from_fragment)
170 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
173 } else if (path_startswith(n->where, m->where)) {
175 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
178 if (m->from_etc_fstab || m->from_fragment)
179 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
182 } else if (pm && path_startswith(pm->what, n->where)) {
184 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
187 if (m->from_etc_fstab || m->from_fragment)
188 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
191 } else if (pn && path_startswith(pn->what, m->where)) {
193 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
196 if (n->from_etc_fstab || n->from_fragment)
197 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
205 static int mount_add_swap_links(Mount *m) {
211 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
212 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
218 static int mount_add_path_links(Mount *m) {
224 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
225 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
231 static int mount_add_automount_links(Mount *m) {
237 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
238 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
244 static int mount_add_socket_links(Mount *m) {
250 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
251 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
257 static char* mount_test_option(const char *haystack, const char *needle) {
262 /* Like glibc's hasmntopt(), but works on a string, not a
269 me.mnt_opts = (char*) haystack;
271 return hasmntopt(&me, needle);
274 static int mount_add_target_links(Mount *m) {
275 const char *target, *after = NULL;
279 bool noauto, nofail, handle, automount;
283 if (m->from_fragment)
284 p = &m->parameters_fragment;
285 else if (m->from_etc_fstab)
286 p = &m->parameters_etc_fstab;
290 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
291 nofail = !!mount_test_option(p->options, "nofail");
293 mount_test_option(p->options, "comment=systemd.mount") ||
294 mount_test_option(p->options, "x-systemd-mount") ||
295 m->meta.manager->mount_auto;
297 mount_test_option(p->options, "comment=systemd.automount") ||
298 mount_test_option(p->options, "x-systemd-automount");
300 if (mount_test_option(p->options, "_netdev") ||
301 (p->fstype && fstype_is_network(p->fstype))) {
302 target = SPECIAL_REMOTE_FS_TARGET;
304 if (m->meta.manager->running_as == MANAGER_SYSTEM)
305 after = SPECIAL_NETWORK_TARGET;
307 target = SPECIAL_LOCAL_FS_TARGET;
309 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
313 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
316 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
319 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
322 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
325 /* Automatically add mount points that aren't natively
326 * configured to local-fs.target */
331 m->meta.manager->running_as == MANAGER_SYSTEM)
332 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
335 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
339 static bool mount_is_bind(MountParameters *p) {
342 if (p->fstype && streq(p->fstype, "bind"))
345 if (mount_test_option(p->options, "bind"))
351 static int mount_add_device_links(Mount *m) {
357 if (m->from_fragment)
358 p = &m->parameters_fragment;
359 else if (m->from_etc_fstab)
360 p = &m->parameters_etc_fstab;
367 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
370 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
371 nofail = !!mount_test_option(p->options, "nofail");
373 if ((r = unit_add_node_link(UNIT(m), p->what,
375 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
381 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
382 !path_equal(m->where, "/")) {
385 /* Let's add in the fsck service */
387 /* aka SPECIAL_FSCK_SERVICE */
388 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
391 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
392 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
399 SERVICE(fsck)->fsck_passno = p->passno;
401 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
408 static int mount_add_default_dependencies(Mount *m) {
413 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
414 !path_equal(m->where, "/")) {
416 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0)
419 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
426 static int mount_verify(Mount *m) {
431 if (m->meta.load_state != UNIT_LOADED)
434 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
437 if (!(e = unit_name_from_path(m->where, ".mount")))
440 b = unit_has_name(UNIT(m), e);
444 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
448 if (m->meta.fragment_path && !m->parameters_fragment.what) {
449 log_error("%s's What setting is missing. Refusing.", m->meta.id);
453 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
454 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
461 static int mount_load(Unit *u) {
466 assert(u->meta.load_state == UNIT_STUB);
468 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
471 /* This is a new unit? Then let's add in some extras */
472 if (u->meta.load_state == UNIT_LOADED) {
473 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
476 if (m->meta.fragment_path)
477 m->from_fragment = true;
480 if (!(m->where = unit_name_to_path(u->meta.id)))
483 path_kill_slashes(m->where);
485 if (!m->meta.description)
486 if ((r = unit_set_description(u, m->where)) < 0)
489 if ((r = mount_add_device_links(m)) < 0)
492 if ((r = mount_add_mount_links(m)) < 0)
495 if ((r = mount_add_socket_links(m)) < 0)
498 if ((r = mount_add_swap_links(m)) < 0)
501 if ((r = mount_add_path_links(m)) < 0)
504 if ((r = mount_add_automount_links(m)) < 0)
507 if ((r = mount_add_target_links(m)) < 0)
510 if ((r = unit_add_default_cgroups(u)) < 0)
513 if (m->meta.default_dependencies)
514 if ((r = mount_add_default_dependencies(m)) < 0)
518 return mount_verify(m);
521 static int mount_notify_automount(Mount *m, int status) {
527 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
528 return r == -ENOENT ? 0 : r;
530 return automount_send_ready(AUTOMOUNT(p), status);
533 static void mount_set_state(Mount *m, MountState state) {
534 MountState old_state;
537 old_state = m->state;
540 if (state != MOUNT_MOUNTING &&
541 state != MOUNT_MOUNTING_DONE &&
542 state != MOUNT_REMOUNTING &&
543 state != MOUNT_UNMOUNTING &&
544 state != MOUNT_MOUNTING_SIGTERM &&
545 state != MOUNT_MOUNTING_SIGKILL &&
546 state != MOUNT_UNMOUNTING_SIGTERM &&
547 state != MOUNT_UNMOUNTING_SIGKILL &&
548 state != MOUNT_REMOUNTING_SIGTERM &&
549 state != MOUNT_REMOUNTING_SIGKILL) {
550 unit_unwatch_timer(UNIT(m), &m->timer_watch);
551 mount_unwatch_control_pid(m);
552 m->control_command = NULL;
553 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
556 if (state == MOUNT_MOUNTED ||
557 state == MOUNT_REMOUNTING)
558 mount_notify_automount(m, 0);
559 else if (state == MOUNT_DEAD ||
560 state == MOUNT_UNMOUNTING ||
561 state == MOUNT_MOUNTING_SIGTERM ||
562 state == MOUNT_MOUNTING_SIGKILL ||
563 state == MOUNT_REMOUNTING_SIGTERM ||
564 state == MOUNT_REMOUNTING_SIGKILL ||
565 state == MOUNT_UNMOUNTING_SIGTERM ||
566 state == MOUNT_UNMOUNTING_SIGKILL ||
567 state == MOUNT_FAILED)
568 mount_notify_automount(m, -ENODEV);
570 if (state != old_state)
571 log_debug("%s changed %s -> %s",
573 mount_state_to_string(old_state),
574 mount_state_to_string(state));
576 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
577 m->reload_failure = false;
580 static int mount_coldplug(Unit *u) {
582 MountState new_state = MOUNT_DEAD;
586 assert(m->state == MOUNT_DEAD);
588 if (m->deserialized_state != m->state)
589 new_state = m->deserialized_state;
590 else if (m->from_proc_self_mountinfo)
591 new_state = MOUNT_MOUNTED;
593 if (new_state != m->state) {
595 if (new_state == MOUNT_MOUNTING ||
596 new_state == MOUNT_MOUNTING_DONE ||
597 new_state == MOUNT_REMOUNTING ||
598 new_state == MOUNT_UNMOUNTING ||
599 new_state == MOUNT_MOUNTING_SIGTERM ||
600 new_state == MOUNT_MOUNTING_SIGKILL ||
601 new_state == MOUNT_UNMOUNTING_SIGTERM ||
602 new_state == MOUNT_UNMOUNTING_SIGKILL ||
603 new_state == MOUNT_REMOUNTING_SIGTERM ||
604 new_state == MOUNT_REMOUNTING_SIGKILL) {
606 if (m->control_pid <= 0)
609 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
612 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
616 mount_set_state(m, new_state);
622 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
629 if (m->from_proc_self_mountinfo)
630 p = &m->parameters_proc_self_mountinfo;
631 else if (m->from_fragment)
632 p = &m->parameters_fragment;
634 p = &m->parameters_etc_fstab;
637 "%sMount State: %s\n"
640 "%sFile System Type: %s\n"
642 "%sFrom /etc/fstab: %s\n"
643 "%sFrom /proc/self/mountinfo: %s\n"
644 "%sFrom fragment: %s\n"
645 "%sDirectoryMode: %04o\n",
646 prefix, mount_state_to_string(m->state),
648 prefix, strna(p->what),
649 prefix, strna(p->fstype),
650 prefix, strna(p->options),
651 prefix, yes_no(m->from_etc_fstab),
652 prefix, yes_no(m->from_proc_self_mountinfo),
653 prefix, yes_no(m->from_fragment),
654 prefix, m->directory_mode);
656 if (m->control_pid > 0)
658 "%sControl PID: %lu\n",
659 prefix, (unsigned long) m->control_pid);
661 exec_context_dump(&m->exec_context, f, prefix);
664 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
672 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
675 if ((r = exec_spawn(c,
679 m->meta.manager->environment,
683 m->meta.manager->confirm_spawn,
684 m->meta.cgroup_bondings,
688 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
689 /* FIXME: we need to do something here */
697 unit_unwatch_timer(UNIT(m), &m->timer_watch);
702 static void mount_enter_dead(Mount *m, bool success) {
708 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
711 static void mount_enter_mounted(Mount *m, bool success) {
717 mount_set_state(m, MOUNT_MOUNTED);
720 static void mount_enter_signal(Mount *m, MountState state, bool success) {
723 bool wait_for_exit = false;
730 if (m->exec_context.kill_mode != KILL_NONE) {
731 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
732 state == MOUNT_UNMOUNTING_SIGTERM ||
733 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
735 if (m->control_pid > 0) {
736 if (kill_and_sigcont(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
738 m->control_pid, sig) < 0 && errno != ESRCH)
740 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
742 wait_for_exit = true;
745 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
747 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
752 /* Exclude the control pid from being killed via the cgroup */
753 if (m->control_pid > 0)
754 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
757 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
758 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
759 log_warning("Failed to kill control group: %s", strerror(-r));
761 wait_for_exit = true;
768 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
771 mount_set_state(m, state);
772 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
773 mount_enter_mounted(m, true);
775 mount_enter_dead(m, true);
780 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
782 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
783 mount_enter_mounted(m, false);
785 mount_enter_dead(m, false);
791 static void mount_enter_unmounting(Mount *m, bool success) {
799 m->control_command_id = MOUNT_EXEC_UNMOUNT;
800 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
802 if ((r = exec_command_set(
809 mount_unwatch_control_pid(m);
811 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
814 mount_set_state(m, MOUNT_UNMOUNTING);
819 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
820 mount_enter_mounted(m, false);
823 static void mount_enter_mounting(Mount *m) {
828 m->control_command_id = MOUNT_EXEC_MOUNT;
829 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
831 mkdir_p(m->where, m->directory_mode);
833 if (m->from_fragment)
834 r = exec_command_set(
837 m->parameters_fragment.what,
839 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
840 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
842 else if (m->from_etc_fstab)
843 r = exec_command_set(
854 mount_unwatch_control_pid(m);
856 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
859 mount_set_state(m, MOUNT_MOUNTING);
864 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
865 mount_enter_dead(m, false);
868 static void mount_enter_mounting_done(Mount *m) {
871 mount_set_state(m, MOUNT_MOUNTING_DONE);
874 static void mount_enter_remounting(Mount *m, bool success) {
882 m->control_command_id = MOUNT_EXEC_REMOUNT;
883 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
885 if (m->from_fragment) {
889 if (m->parameters_fragment.options) {
890 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
899 r = exec_command_set(
902 m->parameters_fragment.what,
904 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
909 } else if (m->from_etc_fstab)
910 r = exec_command_set(
922 mount_unwatch_control_pid(m);
924 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
927 mount_set_state(m, MOUNT_REMOUNTING);
932 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
933 m->reload_failure = true;
934 mount_enter_mounted(m, true);
937 static int mount_start(Unit *u) {
942 /* We cannot fulfill this request right now, try again later
944 if (m->state == MOUNT_UNMOUNTING ||
945 m->state == MOUNT_UNMOUNTING_SIGTERM ||
946 m->state == MOUNT_UNMOUNTING_SIGKILL ||
947 m->state == MOUNT_MOUNTING_SIGTERM ||
948 m->state == MOUNT_MOUNTING_SIGKILL)
952 if (m->state == MOUNT_MOUNTING)
955 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
958 mount_enter_mounting(m);
962 static int mount_stop(Unit *u) {
968 if (m->state == MOUNT_UNMOUNTING ||
969 m->state == MOUNT_UNMOUNTING_SIGKILL ||
970 m->state == MOUNT_UNMOUNTING_SIGTERM ||
971 m->state == MOUNT_MOUNTING_SIGTERM ||
972 m->state == MOUNT_MOUNTING_SIGKILL)
975 assert(m->state == MOUNT_MOUNTING ||
976 m->state == MOUNT_MOUNTING_DONE ||
977 m->state == MOUNT_MOUNTED ||
978 m->state == MOUNT_REMOUNTING ||
979 m->state == MOUNT_REMOUNTING_SIGTERM ||
980 m->state == MOUNT_REMOUNTING_SIGKILL);
982 mount_enter_unmounting(m, true);
986 static int mount_reload(Unit *u) {
991 if (m->state == MOUNT_MOUNTING_DONE)
994 assert(m->state == MOUNT_MOUNTED);
996 mount_enter_remounting(m, true);
1000 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1001 Mount *m = MOUNT(u);
1007 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1008 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1010 if (m->control_pid > 0)
1011 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1013 if (m->control_command_id >= 0)
1014 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1019 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1020 Mount *m = MOUNT(u);
1027 if (streq(key, "state")) {
1030 if ((state = mount_state_from_string(value)) < 0)
1031 log_debug("Failed to parse state value %s", value);
1033 m->deserialized_state = state;
1034 } else if (streq(key, "failure")) {
1037 if ((b = parse_boolean(value)) < 0)
1038 log_debug("Failed to parse failure value %s", value);
1040 m->failure = b || m->failure;
1042 } else if (streq(key, "control-pid")) {
1045 if (parse_pid(value, &pid) < 0)
1046 log_debug("Failed to parse control-pid value %s", value);
1048 m->control_pid = pid;
1049 } else if (streq(key, "control-command")) {
1050 MountExecCommand id;
1052 if ((id = mount_exec_command_from_string(value)) < 0)
1053 log_debug("Failed to parse exec-command value %s", value);
1055 m->control_command_id = id;
1056 m->control_command = m->exec_command + id;
1060 log_debug("Unknown serialization key '%s'", key);
1065 static UnitActiveState mount_active_state(Unit *u) {
1068 return state_translation_table[MOUNT(u)->state];
1071 static const char *mount_sub_state_to_string(Unit *u) {
1074 return mount_state_to_string(MOUNT(u)->state);
1077 static bool mount_check_gc(Unit *u) {
1078 Mount *m = MOUNT(u);
1082 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1085 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1086 Mount *m = MOUNT(u);
1092 if (pid != m->control_pid)
1097 success = is_clean_exit(code, status);
1098 m->failure = m->failure || !success;
1100 if (m->control_command) {
1101 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1102 m->control_command = NULL;
1103 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1106 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1107 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1109 /* Note that mount(8) returning and the kernel sending us a
1110 * mount table change event might happen out-of-order. If an
1111 * operation succeed we assume the kernel will follow soon too
1112 * and already change into the resulting state. If it fails
1113 * we check if the kernel still knows about the mount. and
1114 * change state accordingly. */
1118 case MOUNT_MOUNTING:
1119 case MOUNT_MOUNTING_DONE:
1120 case MOUNT_MOUNTING_SIGKILL:
1121 case MOUNT_MOUNTING_SIGTERM:
1124 mount_enter_mounted(m, true);
1125 else if (m->from_proc_self_mountinfo)
1126 mount_enter_mounted(m, false);
1128 mount_enter_dead(m, false);
1131 case MOUNT_REMOUNTING:
1132 case MOUNT_REMOUNTING_SIGKILL:
1133 case MOUNT_REMOUNTING_SIGTERM:
1135 m->reload_failure = !success;
1136 if (m->from_proc_self_mountinfo)
1137 mount_enter_mounted(m, true);
1139 mount_enter_dead(m, true);
1143 case MOUNT_UNMOUNTING:
1144 case MOUNT_UNMOUNTING_SIGKILL:
1145 case MOUNT_UNMOUNTING_SIGTERM:
1148 mount_enter_dead(m, true);
1149 else if (m->from_proc_self_mountinfo)
1150 mount_enter_mounted(m, false);
1152 mount_enter_dead(m, false);
1156 assert_not_reached("Uh, control process died at wrong time.");
1159 /* Notify clients about changed exit status */
1160 unit_add_to_dbus_queue(u);
1163 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1164 Mount *m = MOUNT(u);
1167 assert(elapsed == 1);
1168 assert(w == &m->timer_watch);
1172 case MOUNT_MOUNTING:
1173 case MOUNT_MOUNTING_DONE:
1174 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1175 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1178 case MOUNT_REMOUNTING:
1179 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1180 m->reload_failure = true;
1181 mount_enter_mounted(m, true);
1184 case MOUNT_UNMOUNTING:
1185 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1186 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1189 case MOUNT_MOUNTING_SIGTERM:
1190 if (m->exec_context.send_sigkill) {
1191 log_warning("%s mounting timed out. Killing.", u->meta.id);
1192 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1194 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1196 if (m->from_proc_self_mountinfo)
1197 mount_enter_mounted(m, false);
1199 mount_enter_dead(m, false);
1203 case MOUNT_REMOUNTING_SIGTERM:
1204 if (m->exec_context.send_sigkill) {
1205 log_warning("%s remounting timed out. Killing.", u->meta.id);
1206 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1208 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1210 if (m->from_proc_self_mountinfo)
1211 mount_enter_mounted(m, false);
1213 mount_enter_dead(m, false);
1217 case MOUNT_UNMOUNTING_SIGTERM:
1218 if (m->exec_context.send_sigkill) {
1219 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1220 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1222 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1224 if (m->from_proc_self_mountinfo)
1225 mount_enter_mounted(m, false);
1227 mount_enter_dead(m, false);
1231 case MOUNT_MOUNTING_SIGKILL:
1232 case MOUNT_REMOUNTING_SIGKILL:
1233 case MOUNT_UNMOUNTING_SIGKILL:
1234 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1236 if (m->from_proc_self_mountinfo)
1237 mount_enter_mounted(m, false);
1239 mount_enter_dead(m, false);
1243 assert_not_reached("Timeout at wrong time.");
1247 static int mount_add_one(
1251 const char *options,
1254 bool from_proc_self_mountinfo,
1259 char *e, *w = NULL, *o = NULL, *f = NULL;
1268 assert(!set_flags || from_proc_self_mountinfo);
1270 /* Ignore API mount points. They should never be referenced in
1271 * dependencies ever. */
1272 if (mount_point_is_api(where))
1274 if (mount_point_ignore(where))
1277 if (streq(fstype, "autofs"))
1280 /* probably some kind of swap, ignore */
1281 if (!is_path(where))
1284 if (!(e = unit_name_from_path(where, ".mount")))
1287 if (!(u = manager_get_unit(m, e))) {
1290 if (!(u = unit_new(m))) {
1295 r = unit_add_name(u, e);
1301 if (!(MOUNT(u)->where = strdup(where))) {
1306 unit_add_to_load_queue(u);
1312 if (!(w = strdup(what)) ||
1313 !(o = strdup(options)) ||
1314 !(f = strdup(fstype))) {
1319 if (from_proc_self_mountinfo) {
1320 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1323 MOUNT(u)->is_mounted = true;
1324 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1325 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1328 MOUNT(u)->from_proc_self_mountinfo = true;
1330 p = &MOUNT(u)->parameters_etc_fstab;
1331 MOUNT(u)->from_etc_fstab = true;
1345 unit_add_to_dbus_queue(u);
1360 static int mount_find_pri(char *options) {
1364 if (!(pri = mount_test_option(options, "pri=")))
1370 r = strtoul(pri, &end, 10);
1375 if (end == pri || (*end != ',' && *end != 0))
1381 static int mount_load_etc_fstab(Manager *m) {
1389 if (!(f = setmntent("/etc/fstab", "r")))
1392 while ((me = getmntent(f))) {
1396 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1401 if (!(where = strdup(me->mnt_dir))) {
1408 path_kill_slashes(what);
1410 if (where[0] == '/')
1411 path_kill_slashes(where);
1413 if (streq(me->mnt_type, "swap")) {
1416 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1423 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1424 !!mount_test_option(me->mnt_opts, "nofail"),
1425 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1428 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1443 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1446 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1450 rewind(m->proc_self_mountinfo);
1455 device = path = options = options2 = fstype = d = p = o = NULL;
1457 if ((k = fscanf(m->proc_self_mountinfo,
1458 "%*s " /* (1) mount id */
1459 "%*s " /* (2) parent id */
1460 "%*s " /* (3) major:minor */
1461 "%*s " /* (4) root */
1462 "%ms " /* (5) mount point */
1463 "%ms" /* (6) mount options */
1464 "%*[^-]" /* (7) optional fields */
1465 "- " /* (8) separator */
1466 "%ms " /* (9) file system type */
1467 "%ms" /* (10) mount source */
1468 "%ms" /* (11) mount options 2 */
1469 "%*[^\n]", /* some rubbish at the end */
1479 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1483 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1488 if (!(d = cunescape(device)) ||
1489 !(p = cunescape(path))) {
1494 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1521 static void mount_shutdown(Manager *m) {
1524 if (m->proc_self_mountinfo) {
1525 fclose(m->proc_self_mountinfo);
1526 m->proc_self_mountinfo = NULL;
1530 static int mount_enumerate(Manager *m) {
1532 struct epoll_event ev;
1535 if (!m->proc_self_mountinfo) {
1536 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1539 m->mount_watch.type = WATCH_MOUNT;
1540 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1543 ev.events = EPOLLPRI;
1544 ev.data.ptr = &m->mount_watch;
1546 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1550 if ((r = mount_load_etc_fstab(m)) < 0)
1553 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1563 void mount_fd_event(Manager *m, int events) {
1568 assert(events & EPOLLPRI);
1570 /* The manager calls this for every fd event happening on the
1571 * /proc/self/mountinfo file, which informs us about mounting
1574 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1575 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1577 /* Reset flags, just in case, for later calls */
1578 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1579 Mount *mount = (Mount*) meta;
1581 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1587 manager_dispatch_load_queue(m);
1589 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1590 Mount *mount = (Mount*) meta;
1592 if (!mount->is_mounted) {
1593 /* This has just been unmounted. */
1595 mount->from_proc_self_mountinfo = false;
1597 switch (mount->state) {
1600 mount_enter_dead(mount, true);
1604 mount_set_state(mount, mount->state);
1609 } else if (mount->just_mounted || mount->just_changed) {
1611 /* New or changed mount entry */
1613 switch (mount->state) {
1617 mount_enter_mounted(mount, true);
1620 case MOUNT_MOUNTING:
1621 mount_enter_mounting_done(mount);
1625 /* Nothing really changed, but let's
1626 * issue an notification call
1627 * nonetheless, in case somebody is
1628 * waiting for this. (e.g. file system
1629 * ro/rw remounts.) */
1630 mount_set_state(mount, mount->state);
1635 /* Reset the flags for later calls */
1636 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1640 static void mount_reset_failed(Unit *u) {
1641 Mount *m = MOUNT(u);
1645 if (m->state == MOUNT_FAILED)
1646 mount_set_state(m, MOUNT_DEAD);
1651 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1652 Mount *m = MOUNT(u);
1654 Set *pid_set = NULL;
1658 if (who == KILL_MAIN) {
1659 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1663 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1664 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1668 if (m->control_pid > 0)
1669 if (kill(mode == KILL_PROCESS_GROUP ? -m->control_pid : m->control_pid, signo) < 0)
1672 if (mode == KILL_CONTROL_GROUP) {
1675 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1678 /* Exclude the control pid from being killed via the cgroup */
1679 if (m->control_pid > 0)
1680 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1685 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1686 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1697 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1698 [MOUNT_DEAD] = "dead",
1699 [MOUNT_MOUNTING] = "mounting",
1700 [MOUNT_MOUNTING_DONE] = "mounting-done",
1701 [MOUNT_MOUNTED] = "mounted",
1702 [MOUNT_REMOUNTING] = "remounting",
1703 [MOUNT_UNMOUNTING] = "unmounting",
1704 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1705 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1706 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1707 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1708 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1709 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1710 [MOUNT_FAILED] = "failed"
1713 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1715 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1716 [MOUNT_EXEC_MOUNT] = "ExecMount",
1717 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1718 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1721 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1723 const UnitVTable mount_vtable = {
1727 .no_instances = true,
1729 .show_status = true,
1735 .coldplug = mount_coldplug,
1739 .start = mount_start,
1741 .reload = mount_reload,
1745 .serialize = mount_serialize,
1746 .deserialize_item = mount_deserialize_item,
1748 .active_state = mount_active_state,
1749 .sub_state_to_string = mount_sub_state_to_string,
1751 .check_gc = mount_check_gc,
1753 .sigchld_event = mount_sigchld_event,
1754 .timer_event = mount_timer_event,
1756 .reset_failed = mount_reset_failed,
1758 .bus_interface = "org.freedesktop.systemd1.Mount",
1759 .bus_message_handler = bus_mount_message_handler,
1760 .bus_invalidating_properties = bus_mount_invalidating_properties,
1762 .enumerate = mount_enumerate,
1763 .shutdown = mount_shutdown