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, nofail, handle, automount;
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 nofail = !!mount_test_option(p->options, "nofail");
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 */
316 m->meta.manager->running_as == MANAGER_SYSTEM)
317 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
320 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
324 static bool mount_is_bind(MountParameters *p) {
327 if (p->fstype && streq(p->fstype, "bind"))
330 if (mount_test_option(p->options, "bind"))
336 static int mount_add_device_links(Mount *m) {
342 if (m->from_fragment)
343 p = &m->parameters_fragment;
344 else if (m->from_etc_fstab)
345 p = &m->parameters_etc_fstab;
352 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
355 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
356 nofail = !!mount_test_option(p->options, "nofail");
358 if ((r = unit_add_node_link(UNIT(m), p->what,
360 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
365 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
366 !path_equal(m->where, "/")) {
369 /* Let's add in the fsck service */
371 /* aka SPECIAL_FSCK_SERVICE */
372 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
375 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
376 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
383 SERVICE(fsck)->fsck_passno = p->passno;
385 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
392 static int mount_add_default_dependencies(Mount *m) {
397 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
398 !path_equal(m->where, "/")) {
400 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0)
403 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
410 static int mount_verify(Mount *m) {
415 if (m->meta.load_state != UNIT_LOADED)
418 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
421 if (!(e = unit_name_from_path(m->where, ".mount")))
424 b = unit_has_name(UNIT(m), e);
428 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
432 if (m->meta.fragment_path && !m->parameters_fragment.what) {
433 log_error("%s's What setting is missing. Refusing.", m->meta.id);
437 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
438 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
445 static int mount_load(Unit *u) {
450 assert(u->meta.load_state == UNIT_STUB);
452 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
455 /* This is a new unit? Then let's add in some extras */
456 if (u->meta.load_state == UNIT_LOADED) {
457 if (m->meta.fragment_path)
458 m->from_fragment = true;
461 if (!(m->where = unit_name_to_path(u->meta.id)))
464 path_kill_slashes(m->where);
466 if (!m->meta.description)
467 if ((r = unit_set_description(u, m->where)) < 0)
470 if ((r = mount_add_device_links(m)) < 0)
473 if ((r = mount_add_mount_links(m)) < 0)
476 if ((r = mount_add_socket_links(m)) < 0)
479 if ((r = mount_add_swap_links(m)) < 0)
482 if ((r = mount_add_path_links(m)) < 0)
485 if ((r = mount_add_automount_links(m)) < 0)
488 if ((r = mount_add_target_links(m)) < 0)
491 if ((r = unit_add_default_cgroups(u)) < 0)
494 if (m->meta.default_dependencies)
495 if ((r = mount_add_default_dependencies(m)) < 0)
499 return mount_verify(m);
502 static int mount_notify_automount(Mount *m, int status) {
508 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
509 return r == -ENOENT ? 0 : r;
511 return automount_send_ready(AUTOMOUNT(p), status);
514 static void mount_set_state(Mount *m, MountState state) {
515 MountState old_state;
518 old_state = m->state;
521 if (state != MOUNT_MOUNTING &&
522 state != MOUNT_MOUNTING_DONE &&
523 state != MOUNT_REMOUNTING &&
524 state != MOUNT_UNMOUNTING &&
525 state != MOUNT_MOUNTING_SIGTERM &&
526 state != MOUNT_MOUNTING_SIGKILL &&
527 state != MOUNT_UNMOUNTING_SIGTERM &&
528 state != MOUNT_UNMOUNTING_SIGKILL &&
529 state != MOUNT_REMOUNTING_SIGTERM &&
530 state != MOUNT_REMOUNTING_SIGKILL) {
531 unit_unwatch_timer(UNIT(m), &m->timer_watch);
532 mount_unwatch_control_pid(m);
533 m->control_command = NULL;
534 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
537 if (state == MOUNT_MOUNTED ||
538 state == MOUNT_REMOUNTING)
539 mount_notify_automount(m, 0);
540 else if (state == MOUNT_DEAD ||
541 state == MOUNT_UNMOUNTING ||
542 state == MOUNT_MOUNTING_SIGTERM ||
543 state == MOUNT_MOUNTING_SIGKILL ||
544 state == MOUNT_REMOUNTING_SIGTERM ||
545 state == MOUNT_REMOUNTING_SIGKILL ||
546 state == MOUNT_UNMOUNTING_SIGTERM ||
547 state == MOUNT_UNMOUNTING_SIGKILL ||
548 state == MOUNT_FAILED)
549 mount_notify_automount(m, -ENODEV);
551 if (state != old_state)
552 log_debug("%s changed %s -> %s",
554 mount_state_to_string(old_state),
555 mount_state_to_string(state));
557 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
560 static int mount_coldplug(Unit *u) {
562 MountState new_state = MOUNT_DEAD;
566 assert(m->state == MOUNT_DEAD);
568 if (m->deserialized_state != m->state)
569 new_state = m->deserialized_state;
570 else if (m->from_proc_self_mountinfo)
571 new_state = MOUNT_MOUNTED;
573 if (new_state != m->state) {
575 if (new_state == MOUNT_MOUNTING ||
576 new_state == MOUNT_MOUNTING_DONE ||
577 new_state == MOUNT_REMOUNTING ||
578 new_state == MOUNT_UNMOUNTING ||
579 new_state == MOUNT_MOUNTING_SIGTERM ||
580 new_state == MOUNT_MOUNTING_SIGKILL ||
581 new_state == MOUNT_UNMOUNTING_SIGTERM ||
582 new_state == MOUNT_UNMOUNTING_SIGKILL ||
583 new_state == MOUNT_REMOUNTING_SIGTERM ||
584 new_state == MOUNT_REMOUNTING_SIGKILL) {
586 if (m->control_pid <= 0)
589 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
592 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
596 mount_set_state(m, new_state);
602 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
609 if (m->from_proc_self_mountinfo)
610 p = &m->parameters_proc_self_mountinfo;
611 else if (m->from_fragment)
612 p = &m->parameters_fragment;
614 p = &m->parameters_etc_fstab;
617 "%sMount State: %s\n"
620 "%sFile System Type: %s\n"
622 "%sFrom /etc/fstab: %s\n"
623 "%sFrom /proc/self/mountinfo: %s\n"
624 "%sFrom fragment: %s\n"
625 "%sDirectoryMode: %04o\n",
626 prefix, mount_state_to_string(m->state),
628 prefix, strna(p->what),
629 prefix, strna(p->fstype),
630 prefix, strna(p->options),
631 prefix, yes_no(m->from_etc_fstab),
632 prefix, yes_no(m->from_proc_self_mountinfo),
633 prefix, yes_no(m->from_fragment),
634 prefix, m->directory_mode);
636 if (m->control_pid > 0)
638 "%sControl PID: %lu\n",
639 prefix, (unsigned long) m->control_pid);
641 exec_context_dump(&m->exec_context, f, prefix);
644 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
652 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
655 if ((r = exec_spawn(c,
659 m->meta.manager->environment,
663 m->meta.manager->confirm_spawn,
664 m->meta.cgroup_bondings,
668 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
669 /* FIXME: we need to do something here */
677 unit_unwatch_timer(UNIT(m), &m->timer_watch);
682 static void mount_enter_dead(Mount *m, bool success) {
688 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
691 static void mount_enter_mounted(Mount *m, bool success) {
697 mount_set_state(m, MOUNT_MOUNTED);
700 static void mount_enter_signal(Mount *m, MountState state, bool success) {
703 bool wait_for_exit = false;
710 if (m->exec_context.kill_mode != KILL_NONE) {
711 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
712 state == MOUNT_UNMOUNTING_SIGTERM ||
713 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
715 if (m->control_pid > 0) {
716 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
718 m->control_pid, sig) < 0 && errno != ESRCH)
720 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
722 wait_for_exit = true;
725 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
727 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
732 /* Exclude the control pid from being killed via the cgroup */
733 if (m->control_pid > 0)
734 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
737 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
738 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
739 log_warning("Failed to kill control group: %s", strerror(-r));
741 wait_for_exit = true;
748 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
751 mount_set_state(m, state);
752 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
753 mount_enter_mounted(m, true);
755 mount_enter_dead(m, true);
760 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
762 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
763 mount_enter_mounted(m, false);
765 mount_enter_dead(m, false);
771 static void mount_enter_unmounting(Mount *m, bool success) {
779 m->control_command_id = MOUNT_EXEC_UNMOUNT;
780 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
782 if ((r = exec_command_set(
789 mount_unwatch_control_pid(m);
791 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
794 mount_set_state(m, MOUNT_UNMOUNTING);
799 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
800 mount_enter_mounted(m, false);
803 static void mount_enter_mounting(Mount *m) {
808 m->control_command_id = MOUNT_EXEC_MOUNT;
809 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
811 mkdir_p(m->where, m->directory_mode);
813 if (m->from_fragment)
814 r = exec_command_set(
817 m->parameters_fragment.what,
819 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
820 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
822 else if (m->from_etc_fstab)
823 r = exec_command_set(
834 mount_unwatch_control_pid(m);
836 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
839 mount_set_state(m, MOUNT_MOUNTING);
844 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
845 mount_enter_dead(m, false);
848 static void mount_enter_mounting_done(Mount *m) {
851 mount_set_state(m, MOUNT_MOUNTING_DONE);
854 static void mount_enter_remounting(Mount *m, bool success) {
862 m->control_command_id = MOUNT_EXEC_REMOUNT;
863 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
865 if (m->from_fragment) {
869 if (m->parameters_fragment.options) {
870 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
879 r = exec_command_set(
882 m->parameters_fragment.what,
884 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
889 } else if (m->from_etc_fstab)
890 r = exec_command_set(
902 mount_unwatch_control_pid(m);
904 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
907 mount_set_state(m, MOUNT_REMOUNTING);
912 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
913 mount_enter_mounted(m, false);
916 static int mount_start(Unit *u) {
921 /* We cannot fulfill this request right now, try again later
923 if (m->state == MOUNT_UNMOUNTING ||
924 m->state == MOUNT_UNMOUNTING_SIGTERM ||
925 m->state == MOUNT_UNMOUNTING_SIGKILL ||
926 m->state == MOUNT_MOUNTING_SIGTERM ||
927 m->state == MOUNT_MOUNTING_SIGKILL)
931 if (m->state == MOUNT_MOUNTING)
934 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
937 mount_enter_mounting(m);
941 static int mount_stop(Unit *u) {
947 if (m->state == MOUNT_UNMOUNTING ||
948 m->state == MOUNT_UNMOUNTING_SIGKILL ||
949 m->state == MOUNT_UNMOUNTING_SIGTERM ||
950 m->state == MOUNT_MOUNTING_SIGTERM ||
951 m->state == MOUNT_MOUNTING_SIGKILL)
954 assert(m->state == MOUNT_MOUNTING ||
955 m->state == MOUNT_MOUNTING_DONE ||
956 m->state == MOUNT_MOUNTED ||
957 m->state == MOUNT_REMOUNTING ||
958 m->state == MOUNT_REMOUNTING_SIGTERM ||
959 m->state == MOUNT_REMOUNTING_SIGKILL);
961 mount_enter_unmounting(m, true);
965 static int mount_reload(Unit *u) {
970 if (m->state == MOUNT_MOUNTING_DONE)
973 assert(m->state == MOUNT_MOUNTED);
975 mount_enter_remounting(m, true);
979 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
986 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
987 unit_serialize_item(u, f, "failure", yes_no(m->failure));
989 if (m->control_pid > 0)
990 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
992 if (m->control_command_id >= 0)
993 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
998 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1006 if (streq(key, "state")) {
1009 if ((state = mount_state_from_string(value)) < 0)
1010 log_debug("Failed to parse state value %s", value);
1012 m->deserialized_state = state;
1013 } else if (streq(key, "failure")) {
1016 if ((b = parse_boolean(value)) < 0)
1017 log_debug("Failed to parse failure value %s", value);
1019 m->failure = b || m->failure;
1021 } else if (streq(key, "control-pid")) {
1024 if (parse_pid(value, &pid) < 0)
1025 log_debug("Failed to parse control-pid value %s", value);
1027 m->control_pid = pid;
1028 } else if (streq(key, "control-command")) {
1029 MountExecCommand id;
1031 if ((id = mount_exec_command_from_string(value)) < 0)
1032 log_debug("Failed to parse exec-command value %s", value);
1034 m->control_command_id = id;
1035 m->control_command = m->exec_command + id;
1039 log_debug("Unknown serialization key '%s'", key);
1044 static UnitActiveState mount_active_state(Unit *u) {
1047 return state_translation_table[MOUNT(u)->state];
1050 static const char *mount_sub_state_to_string(Unit *u) {
1053 return mount_state_to_string(MOUNT(u)->state);
1056 static bool mount_check_gc(Unit *u) {
1057 Mount *m = MOUNT(u);
1061 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1064 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1065 Mount *m = MOUNT(u);
1071 if (pid != m->control_pid)
1076 success = is_clean_exit(code, status);
1077 m->failure = m->failure || !success;
1079 if (m->control_command) {
1080 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1081 m->control_command = NULL;
1082 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1085 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1086 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1088 /* Note that mount(8) returning and the kernel sending us a
1089 * mount table change event might happen out-of-order. If an
1090 * operation succeed we assume the kernel will follow soon too
1091 * and already change into the resulting state. If it fails
1092 * we check if the kernel still knows about the mount. and
1093 * change state accordingly. */
1097 case MOUNT_MOUNTING:
1098 case MOUNT_MOUNTING_DONE:
1099 case MOUNT_MOUNTING_SIGKILL:
1100 case MOUNT_MOUNTING_SIGTERM:
1101 case MOUNT_REMOUNTING:
1102 case MOUNT_REMOUNTING_SIGKILL:
1103 case MOUNT_REMOUNTING_SIGTERM:
1106 mount_enter_mounted(m, true);
1107 else if (m->from_proc_self_mountinfo)
1108 mount_enter_mounted(m, false);
1110 mount_enter_dead(m, false);
1113 case MOUNT_UNMOUNTING:
1114 case MOUNT_UNMOUNTING_SIGKILL:
1115 case MOUNT_UNMOUNTING_SIGTERM:
1118 mount_enter_dead(m, true);
1119 else if (m->from_proc_self_mountinfo)
1120 mount_enter_mounted(m, false);
1122 mount_enter_dead(m, false);
1126 assert_not_reached("Uh, control process died at wrong time.");
1129 /* Notify clients about changed exit status */
1130 unit_add_to_dbus_queue(u);
1133 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1134 Mount *m = MOUNT(u);
1137 assert(elapsed == 1);
1138 assert(w == &m->timer_watch);
1142 case MOUNT_MOUNTING:
1143 case MOUNT_MOUNTING_DONE:
1144 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1145 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1148 case MOUNT_REMOUNTING:
1149 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1150 mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
1153 case MOUNT_UNMOUNTING:
1154 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1155 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1158 case MOUNT_MOUNTING_SIGTERM:
1159 log_warning("%s mounting timed out. Killing.", u->meta.id);
1160 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1163 case MOUNT_REMOUNTING_SIGTERM:
1164 log_warning("%s remounting timed out. Killing.", u->meta.id);
1165 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1168 case MOUNT_UNMOUNTING_SIGTERM:
1169 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1170 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1173 case MOUNT_MOUNTING_SIGKILL:
1174 case MOUNT_REMOUNTING_SIGKILL:
1175 case MOUNT_UNMOUNTING_SIGKILL:
1176 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1178 if (m->from_proc_self_mountinfo)
1179 mount_enter_mounted(m, false);
1181 mount_enter_dead(m, false);
1185 assert_not_reached("Timeout at wrong time.");
1189 static int mount_add_one(
1193 const char *options,
1196 bool from_proc_self_mountinfo,
1201 char *e, *w = NULL, *o = NULL, *f = NULL;
1210 assert(!set_flags || from_proc_self_mountinfo);
1212 /* Ignore API mount points. They should never be referenced in
1213 * dependencies ever. */
1214 if (mount_point_is_api(where))
1216 if (mount_point_ignore(where))
1219 if (streq(fstype, "autofs"))
1222 /* probably some kind of swap, ignore */
1223 if (!is_path(where))
1226 if (!(e = unit_name_from_path(where, ".mount")))
1229 if (!(u = manager_get_unit(m, e))) {
1232 if (!(u = unit_new(m))) {
1237 r = unit_add_name(u, e);
1243 if (!(MOUNT(u)->where = strdup(where))) {
1248 unit_add_to_load_queue(u);
1254 if (!(w = strdup(what)) ||
1255 !(o = strdup(options)) ||
1256 !(f = strdup(fstype))) {
1261 if (from_proc_self_mountinfo) {
1262 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1265 MOUNT(u)->is_mounted = true;
1266 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1267 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1270 MOUNT(u)->from_proc_self_mountinfo = true;
1272 p = &MOUNT(u)->parameters_etc_fstab;
1273 MOUNT(u)->from_etc_fstab = true;
1287 unit_add_to_dbus_queue(u);
1302 static int mount_find_pri(char *options) {
1306 if (!(pri = mount_test_option(options, "pri=")))
1312 r = strtoul(pri, &end, 10);
1317 if (end == pri || (*end != ',' && *end != 0))
1323 static int mount_load_etc_fstab(Manager *m) {
1331 if (!(f = setmntent("/etc/fstab", "r")))
1334 while ((me = getmntent(f))) {
1338 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1343 if (!(where = strdup(me->mnt_dir))) {
1350 path_kill_slashes(what);
1352 if (where[0] == '/')
1353 path_kill_slashes(where);
1355 if (streq(me->mnt_type, "swap")) {
1358 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1365 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1366 !!mount_test_option(me->mnt_opts, "nofail"),
1367 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1370 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1385 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1388 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1392 rewind(m->proc_self_mountinfo);
1397 device = path = options = options2 = fstype = d = p = o = NULL;
1399 if ((k = fscanf(m->proc_self_mountinfo,
1400 "%*s " /* (1) mount id */
1401 "%*s " /* (2) parent id */
1402 "%*s " /* (3) major:minor */
1403 "%*s " /* (4) root */
1404 "%ms " /* (5) mount point */
1405 "%ms" /* (6) mount options */
1406 "%*[^-]" /* (7) optional fields */
1407 "- " /* (8) separator */
1408 "%ms " /* (9) file system type */
1409 "%ms" /* (10) mount source */
1410 "%ms" /* (11) mount options 2 */
1411 "%*[^\n]", /* some rubbish at the end */
1421 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1425 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1430 if (!(d = cunescape(device)) ||
1431 !(p = cunescape(path))) {
1436 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1463 static void mount_shutdown(Manager *m) {
1466 if (m->proc_self_mountinfo) {
1467 fclose(m->proc_self_mountinfo);
1468 m->proc_self_mountinfo = NULL;
1472 static int mount_enumerate(Manager *m) {
1474 struct epoll_event ev;
1477 if (!m->proc_self_mountinfo) {
1478 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1481 m->mount_watch.type = WATCH_MOUNT;
1482 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1485 ev.events = EPOLLPRI;
1486 ev.data.ptr = &m->mount_watch;
1488 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1492 if ((r = mount_load_etc_fstab(m)) < 0)
1495 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1505 void mount_fd_event(Manager *m, int events) {
1510 assert(events & EPOLLPRI);
1512 /* The manager calls this for every fd event happening on the
1513 * /proc/self/mountinfo file, which informs us about mounting
1516 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1517 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1519 /* Reset flags, just in case, for later calls */
1520 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1521 Mount *mount = (Mount*) meta;
1523 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1529 manager_dispatch_load_queue(m);
1531 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1532 Mount *mount = (Mount*) meta;
1534 if (!mount->is_mounted) {
1535 /* This has just been unmounted. */
1537 mount->from_proc_self_mountinfo = false;
1539 switch (mount->state) {
1542 mount_enter_dead(mount, true);
1546 mount_set_state(mount, mount->state);
1551 } else if (mount->just_mounted || mount->just_changed) {
1553 /* New or changed mount entry */
1555 switch (mount->state) {
1559 mount_enter_mounted(mount, true);
1562 case MOUNT_MOUNTING:
1563 mount_enter_mounting_done(mount);
1567 /* Nothing really changed, but let's
1568 * issue an notification call
1569 * nonetheless, in case somebody is
1570 * waiting for this. (e.g. file system
1571 * ro/rw remounts.) */
1572 mount_set_state(mount, mount->state);
1577 /* Reset the flags for later calls */
1578 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1582 static void mount_reset_failed(Unit *u) {
1583 Mount *m = MOUNT(u);
1587 if (m->state == MOUNT_FAILED)
1588 mount_set_state(m, MOUNT_DEAD);
1593 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1594 Mount *m = MOUNT(u);
1596 Set *pid_set = NULL;
1600 if (who == KILL_MAIN) {
1601 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1605 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1606 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1610 if (m->control_pid > 0)
1611 if (kill(mode == KILL_PROCESS_GROUP ? -m->control_pid : m->control_pid, signo) < 0)
1614 if (mode == KILL_CONTROL_GROUP) {
1617 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1620 /* Exclude the control pid from being killed via the cgroup */
1621 if (m->control_pid > 0)
1622 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1627 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, pid_set)) < 0)
1628 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1639 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1640 [MOUNT_DEAD] = "dead",
1641 [MOUNT_MOUNTING] = "mounting",
1642 [MOUNT_MOUNTING_DONE] = "mounting-done",
1643 [MOUNT_MOUNTED] = "mounted",
1644 [MOUNT_REMOUNTING] = "remounting",
1645 [MOUNT_UNMOUNTING] = "unmounting",
1646 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1647 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1648 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1649 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1650 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1651 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1652 [MOUNT_FAILED] = "failed"
1655 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1657 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1658 [MOUNT_EXEC_MOUNT] = "ExecMount",
1659 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1660 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1663 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1665 const UnitVTable mount_vtable = {
1669 .no_instances = true,
1671 .show_status = true,
1677 .coldplug = mount_coldplug,
1681 .start = mount_start,
1683 .reload = mount_reload,
1687 .serialize = mount_serialize,
1688 .deserialize_item = mount_deserialize_item,
1690 .active_state = mount_active_state,
1691 .sub_state_to_string = mount_sub_state_to_string,
1693 .check_gc = mount_check_gc,
1695 .sigchld_event = mount_sigchld_event,
1696 .timer_event = mount_timer_event,
1698 .reset_failed = mount_reset_failed,
1700 .bus_interface = "org.freedesktop.systemd1.Mount",
1701 .bus_message_handler = bus_mount_message_handler,
1702 .bus_invalidating_properties = bus_mount_invalidating_properties,
1704 .enumerate = mount_enumerate,
1705 .shutdown = mount_shutdown