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);
68 /* We need to make sure that /bin/mount is always called in
69 * the same process group as us, so that the autofs kernel
70 * side doesn't send us another mount request while we are
71 * already trying to comply its last one. */
72 m->exec_context.same_pgrp = true;
74 m->timer_watch.type = WATCH_INVALID;
76 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
79 static void mount_unwatch_control_pid(Mount *m) {
82 if (m->control_pid <= 0)
85 unit_unwatch_pid(UNIT(m), m->control_pid);
89 static void mount_parameters_done(MountParameters *p) {
96 p->what = p->options = p->fstype = NULL;
99 static void mount_done(Unit *u) {
107 mount_parameters_done(&m->parameters_etc_fstab);
108 mount_parameters_done(&m->parameters_proc_self_mountinfo);
109 mount_parameters_done(&m->parameters_fragment);
111 exec_context_done(&m->exec_context);
112 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
113 m->control_command = NULL;
115 mount_unwatch_control_pid(m);
117 unit_unwatch_timer(u, &m->timer_watch);
120 static int mount_add_mount_links(Mount *m) {
127 if (m->from_fragment)
128 pm = &m->parameters_fragment;
129 else if (m->from_etc_fstab)
130 pm = &m->parameters_etc_fstab;
134 /* Adds in links to other mount points that might lie below or
135 * above us in the hierarchy */
137 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
138 Mount *n = (Mount*) other;
144 if (n->meta.load_state != UNIT_LOADED)
147 if (n->from_fragment)
148 pn = &n->parameters_fragment;
149 else if (n->from_etc_fstab)
150 pn = &n->parameters_etc_fstab;
154 if (path_startswith(m->where, n->where)) {
156 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
159 if (n->from_etc_fstab || n->from_fragment)
160 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
163 } else if (path_startswith(n->where, m->where)) {
165 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
168 if (m->from_etc_fstab || m->from_fragment)
169 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
172 } else if (pm && path_startswith(pm->what, n->where)) {
174 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
177 if (m->from_etc_fstab || m->from_fragment)
178 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
181 } else if (pn && path_startswith(pn->what, m->where)) {
183 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
186 if (n->from_etc_fstab || n->from_fragment)
187 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
195 static int mount_add_swap_links(Mount *m) {
201 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
202 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
208 static int mount_add_path_links(Mount *m) {
214 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
215 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
221 static int mount_add_automount_links(Mount *m) {
227 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
228 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
234 static int mount_add_socket_links(Mount *m) {
240 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
241 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
247 static char* mount_test_option(const char *haystack, const char *needle) {
252 /* Like glibc's hasmntopt(), but works on a string, not a
259 me.mnt_opts = (char*) haystack;
261 return hasmntopt(&me, needle);
264 static int mount_add_target_links(Mount *m) {
265 const char *target, *after = NULL;
269 bool noauto, nofail, handle, automount;
273 if (m->from_fragment)
274 p = &m->parameters_fragment;
275 else if (m->from_etc_fstab)
276 p = &m->parameters_etc_fstab;
280 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
281 nofail = !!mount_test_option(p->options, "nofail");
282 handle = !!mount_test_option(p->options, "comment=systemd.mount") ||
283 m->meta.manager->mount_auto;
284 automount = !!mount_test_option(p->options, "comment=systemd.automount");
286 if (mount_test_option(p->options, "_netdev") ||
287 (p->fstype && fstype_is_network(p->fstype))) {
288 target = SPECIAL_REMOTE_FS_TARGET;
290 if (m->meta.manager->running_as == MANAGER_SYSTEM)
291 after = SPECIAL_NETWORK_TARGET;
293 target = SPECIAL_LOCAL_FS_TARGET;
295 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
299 if ((r = unit_add_dependency_by_name(tu, UNIT_AFTER, after, NULL, true)) < 0)
302 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
305 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
308 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
311 /* Automatically add mount points that aren't natively
312 * configured to local-fs.target */
317 m->meta.manager->running_as == MANAGER_SYSTEM)
318 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
321 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
325 static bool mount_is_bind(MountParameters *p) {
328 if (p->fstype && streq(p->fstype, "bind"))
331 if (mount_test_option(p->options, "bind"))
337 static int mount_add_device_links(Mount *m) {
343 if (m->from_fragment)
344 p = &m->parameters_fragment;
345 else if (m->from_etc_fstab)
346 p = &m->parameters_etc_fstab;
353 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
356 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
357 nofail = !!mount_test_option(p->options, "nofail");
359 if ((r = unit_add_node_link(UNIT(m), p->what,
361 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
366 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
367 !path_equal(m->where, "/")) {
370 /* Let's add in the fsck service */
372 /* aka SPECIAL_FSCK_SERVICE */
373 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
376 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
377 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
384 SERVICE(fsck)->fsck_passno = p->passno;
386 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
393 static int mount_add_default_dependencies(Mount *m) {
398 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
399 !path_equal(m->where, "/")) {
401 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_BEFORE, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0)
404 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
411 static int mount_verify(Mount *m) {
416 if (m->meta.load_state != UNIT_LOADED)
419 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
422 if (!(e = unit_name_from_path(m->where, ".mount")))
425 b = unit_has_name(UNIT(m), e);
429 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
433 if (m->meta.fragment_path && !m->parameters_fragment.what) {
434 log_error("%s's What setting is missing. Refusing.", m->meta.id);
438 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
439 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
446 static int mount_load(Unit *u) {
451 assert(u->meta.load_state == UNIT_STUB);
453 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
456 /* This is a new unit? Then let's add in some extras */
457 if (u->meta.load_state == UNIT_LOADED) {
458 if (m->meta.fragment_path)
459 m->from_fragment = true;
462 if (!(m->where = unit_name_to_path(u->meta.id)))
465 path_kill_slashes(m->where);
467 if (!m->meta.description)
468 if ((r = unit_set_description(u, m->where)) < 0)
471 if ((r = mount_add_device_links(m)) < 0)
474 if ((r = mount_add_mount_links(m)) < 0)
477 if ((r = mount_add_socket_links(m)) < 0)
480 if ((r = mount_add_swap_links(m)) < 0)
483 if ((r = mount_add_path_links(m)) < 0)
486 if ((r = mount_add_automount_links(m)) < 0)
489 if ((r = mount_add_target_links(m)) < 0)
492 if ((r = unit_add_default_cgroups(u)) < 0)
495 if (m->meta.default_dependencies)
496 if ((r = mount_add_default_dependencies(m)) < 0)
500 return mount_verify(m);
503 static int mount_notify_automount(Mount *m, int status) {
509 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
510 return r == -ENOENT ? 0 : r;
512 return automount_send_ready(AUTOMOUNT(p), status);
515 static void mount_set_state(Mount *m, MountState state) {
516 MountState old_state;
519 old_state = m->state;
522 if (state != MOUNT_MOUNTING &&
523 state != MOUNT_MOUNTING_DONE &&
524 state != MOUNT_REMOUNTING &&
525 state != MOUNT_UNMOUNTING &&
526 state != MOUNT_MOUNTING_SIGTERM &&
527 state != MOUNT_MOUNTING_SIGKILL &&
528 state != MOUNT_UNMOUNTING_SIGTERM &&
529 state != MOUNT_UNMOUNTING_SIGKILL &&
530 state != MOUNT_REMOUNTING_SIGTERM &&
531 state != MOUNT_REMOUNTING_SIGKILL) {
532 unit_unwatch_timer(UNIT(m), &m->timer_watch);
533 mount_unwatch_control_pid(m);
534 m->control_command = NULL;
535 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
538 if (state == MOUNT_MOUNTED ||
539 state == MOUNT_REMOUNTING)
540 mount_notify_automount(m, 0);
541 else if (state == MOUNT_DEAD ||
542 state == MOUNT_UNMOUNTING ||
543 state == MOUNT_MOUNTING_SIGTERM ||
544 state == MOUNT_MOUNTING_SIGKILL ||
545 state == MOUNT_REMOUNTING_SIGTERM ||
546 state == MOUNT_REMOUNTING_SIGKILL ||
547 state == MOUNT_UNMOUNTING_SIGTERM ||
548 state == MOUNT_UNMOUNTING_SIGKILL ||
549 state == MOUNT_FAILED)
550 mount_notify_automount(m, -ENODEV);
552 if (state != old_state)
553 log_debug("%s changed %s -> %s",
555 mount_state_to_string(old_state),
556 mount_state_to_string(state));
558 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
559 m->reload_failure = false;
562 static int mount_coldplug(Unit *u) {
564 MountState new_state = MOUNT_DEAD;
568 assert(m->state == MOUNT_DEAD);
570 if (m->deserialized_state != m->state)
571 new_state = m->deserialized_state;
572 else if (m->from_proc_self_mountinfo)
573 new_state = MOUNT_MOUNTED;
575 if (new_state != m->state) {
577 if (new_state == MOUNT_MOUNTING ||
578 new_state == MOUNT_MOUNTING_DONE ||
579 new_state == MOUNT_REMOUNTING ||
580 new_state == MOUNT_UNMOUNTING ||
581 new_state == MOUNT_MOUNTING_SIGTERM ||
582 new_state == MOUNT_MOUNTING_SIGKILL ||
583 new_state == MOUNT_UNMOUNTING_SIGTERM ||
584 new_state == MOUNT_UNMOUNTING_SIGKILL ||
585 new_state == MOUNT_REMOUNTING_SIGTERM ||
586 new_state == MOUNT_REMOUNTING_SIGKILL) {
588 if (m->control_pid <= 0)
591 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
594 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
598 mount_set_state(m, new_state);
604 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
611 if (m->from_proc_self_mountinfo)
612 p = &m->parameters_proc_self_mountinfo;
613 else if (m->from_fragment)
614 p = &m->parameters_fragment;
616 p = &m->parameters_etc_fstab;
619 "%sMount State: %s\n"
622 "%sFile System Type: %s\n"
624 "%sFrom /etc/fstab: %s\n"
625 "%sFrom /proc/self/mountinfo: %s\n"
626 "%sFrom fragment: %s\n"
627 "%sDirectoryMode: %04o\n",
628 prefix, mount_state_to_string(m->state),
630 prefix, strna(p->what),
631 prefix, strna(p->fstype),
632 prefix, strna(p->options),
633 prefix, yes_no(m->from_etc_fstab),
634 prefix, yes_no(m->from_proc_self_mountinfo),
635 prefix, yes_no(m->from_fragment),
636 prefix, m->directory_mode);
638 if (m->control_pid > 0)
640 "%sControl PID: %lu\n",
641 prefix, (unsigned long) m->control_pid);
643 exec_context_dump(&m->exec_context, f, prefix);
646 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
654 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
657 if ((r = exec_spawn(c,
661 m->meta.manager->environment,
665 m->meta.manager->confirm_spawn,
666 m->meta.cgroup_bondings,
670 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
671 /* FIXME: we need to do something here */
679 unit_unwatch_timer(UNIT(m), &m->timer_watch);
684 static void mount_enter_dead(Mount *m, bool success) {
690 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
693 static void mount_enter_mounted(Mount *m, bool success) {
699 mount_set_state(m, MOUNT_MOUNTED);
702 static void mount_enter_signal(Mount *m, MountState state, bool success) {
705 bool wait_for_exit = false;
712 if (m->exec_context.kill_mode != KILL_NONE) {
713 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
714 state == MOUNT_UNMOUNTING_SIGTERM ||
715 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
717 if (m->control_pid > 0) {
718 if (kill(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
720 m->control_pid, sig) < 0 && errno != ESRCH)
722 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
724 wait_for_exit = true;
727 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
729 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
734 /* Exclude the control pid from being killed via the cgroup */
735 if (m->control_pid > 0)
736 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
739 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, pid_set)) < 0) {
740 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
741 log_warning("Failed to kill control group: %s", strerror(-r));
743 wait_for_exit = true;
750 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
753 mount_set_state(m, state);
754 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
755 mount_enter_mounted(m, true);
757 mount_enter_dead(m, true);
762 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
764 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
765 mount_enter_mounted(m, false);
767 mount_enter_dead(m, false);
773 static void mount_enter_unmounting(Mount *m, bool success) {
781 m->control_command_id = MOUNT_EXEC_UNMOUNT;
782 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
784 if ((r = exec_command_set(
791 mount_unwatch_control_pid(m);
793 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
796 mount_set_state(m, MOUNT_UNMOUNTING);
801 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
802 mount_enter_mounted(m, false);
805 static void mount_enter_mounting(Mount *m) {
810 m->control_command_id = MOUNT_EXEC_MOUNT;
811 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
813 mkdir_p(m->where, m->directory_mode);
815 if (m->from_fragment)
816 r = exec_command_set(
819 m->parameters_fragment.what,
821 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
822 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
824 else if (m->from_etc_fstab)
825 r = exec_command_set(
836 mount_unwatch_control_pid(m);
838 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
841 mount_set_state(m, MOUNT_MOUNTING);
846 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
847 mount_enter_dead(m, false);
850 static void mount_enter_mounting_done(Mount *m) {
853 mount_set_state(m, MOUNT_MOUNTING_DONE);
856 static void mount_enter_remounting(Mount *m, bool success) {
864 m->control_command_id = MOUNT_EXEC_REMOUNT;
865 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
867 if (m->from_fragment) {
871 if (m->parameters_fragment.options) {
872 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
881 r = exec_command_set(
884 m->parameters_fragment.what,
886 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
891 } else if (m->from_etc_fstab)
892 r = exec_command_set(
904 mount_unwatch_control_pid(m);
906 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
909 mount_set_state(m, MOUNT_REMOUNTING);
914 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
915 m->reload_failure = true;
916 mount_enter_mounted(m, true);
919 static int mount_start(Unit *u) {
924 /* We cannot fulfill this request right now, try again later
926 if (m->state == MOUNT_UNMOUNTING ||
927 m->state == MOUNT_UNMOUNTING_SIGTERM ||
928 m->state == MOUNT_UNMOUNTING_SIGKILL ||
929 m->state == MOUNT_MOUNTING_SIGTERM ||
930 m->state == MOUNT_MOUNTING_SIGKILL)
934 if (m->state == MOUNT_MOUNTING)
937 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
940 mount_enter_mounting(m);
944 static int mount_stop(Unit *u) {
950 if (m->state == MOUNT_UNMOUNTING ||
951 m->state == MOUNT_UNMOUNTING_SIGKILL ||
952 m->state == MOUNT_UNMOUNTING_SIGTERM ||
953 m->state == MOUNT_MOUNTING_SIGTERM ||
954 m->state == MOUNT_MOUNTING_SIGKILL)
957 assert(m->state == MOUNT_MOUNTING ||
958 m->state == MOUNT_MOUNTING_DONE ||
959 m->state == MOUNT_MOUNTED ||
960 m->state == MOUNT_REMOUNTING ||
961 m->state == MOUNT_REMOUNTING_SIGTERM ||
962 m->state == MOUNT_REMOUNTING_SIGKILL);
964 mount_enter_unmounting(m, true);
968 static int mount_reload(Unit *u) {
973 if (m->state == MOUNT_MOUNTING_DONE)
976 assert(m->state == MOUNT_MOUNTED);
978 mount_enter_remounting(m, true);
982 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
989 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
990 unit_serialize_item(u, f, "failure", yes_no(m->failure));
992 if (m->control_pid > 0)
993 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
995 if (m->control_command_id >= 0)
996 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1001 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1002 Mount *m = MOUNT(u);
1009 if (streq(key, "state")) {
1012 if ((state = mount_state_from_string(value)) < 0)
1013 log_debug("Failed to parse state value %s", value);
1015 m->deserialized_state = state;
1016 } else if (streq(key, "failure")) {
1019 if ((b = parse_boolean(value)) < 0)
1020 log_debug("Failed to parse failure value %s", value);
1022 m->failure = b || m->failure;
1024 } else if (streq(key, "control-pid")) {
1027 if (parse_pid(value, &pid) < 0)
1028 log_debug("Failed to parse control-pid value %s", value);
1030 m->control_pid = pid;
1031 } else if (streq(key, "control-command")) {
1032 MountExecCommand id;
1034 if ((id = mount_exec_command_from_string(value)) < 0)
1035 log_debug("Failed to parse exec-command value %s", value);
1037 m->control_command_id = id;
1038 m->control_command = m->exec_command + id;
1042 log_debug("Unknown serialization key '%s'", key);
1047 static UnitActiveState mount_active_state(Unit *u) {
1050 return state_translation_table[MOUNT(u)->state];
1053 static const char *mount_sub_state_to_string(Unit *u) {
1056 return mount_state_to_string(MOUNT(u)->state);
1059 static bool mount_check_gc(Unit *u) {
1060 Mount *m = MOUNT(u);
1064 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1067 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1068 Mount *m = MOUNT(u);
1074 if (pid != m->control_pid)
1079 success = is_clean_exit(code, status);
1080 m->failure = m->failure || !success;
1082 if (m->control_command) {
1083 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1084 m->control_command = NULL;
1085 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1088 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1089 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1091 /* Note that mount(8) returning and the kernel sending us a
1092 * mount table change event might happen out-of-order. If an
1093 * operation succeed we assume the kernel will follow soon too
1094 * and already change into the resulting state. If it fails
1095 * we check if the kernel still knows about the mount. and
1096 * change state accordingly. */
1100 case MOUNT_MOUNTING:
1101 case MOUNT_MOUNTING_DONE:
1102 case MOUNT_MOUNTING_SIGKILL:
1103 case MOUNT_MOUNTING_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_REMOUNTING:
1114 case MOUNT_REMOUNTING_SIGKILL:
1115 case MOUNT_REMOUNTING_SIGTERM:
1117 m->reload_failure = !success;
1118 if (m->from_proc_self_mountinfo)
1119 mount_enter_mounted(m, true);
1121 mount_enter_dead(m, true);
1125 case MOUNT_UNMOUNTING:
1126 case MOUNT_UNMOUNTING_SIGKILL:
1127 case MOUNT_UNMOUNTING_SIGTERM:
1130 mount_enter_dead(m, true);
1131 else if (m->from_proc_self_mountinfo)
1132 mount_enter_mounted(m, false);
1134 mount_enter_dead(m, false);
1138 assert_not_reached("Uh, control process died at wrong time.");
1141 /* Notify clients about changed exit status */
1142 unit_add_to_dbus_queue(u);
1145 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1146 Mount *m = MOUNT(u);
1149 assert(elapsed == 1);
1150 assert(w == &m->timer_watch);
1154 case MOUNT_MOUNTING:
1155 case MOUNT_MOUNTING_DONE:
1156 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1157 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1160 case MOUNT_REMOUNTING:
1161 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1162 m->reload_failure = true;
1163 mount_enter_mounted(m, true);
1166 case MOUNT_UNMOUNTING:
1167 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1168 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1171 case MOUNT_MOUNTING_SIGTERM:
1172 if (m->exec_context.send_sigkill) {
1173 log_warning("%s mounting timed out. Killing.", u->meta.id);
1174 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1176 log_warning("%s mounting timed out. Skipping 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 case MOUNT_REMOUNTING_SIGTERM:
1186 if (m->exec_context.send_sigkill) {
1187 log_warning("%s remounting timed out. Killing.", u->meta.id);
1188 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1190 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1192 if (m->from_proc_self_mountinfo)
1193 mount_enter_mounted(m, false);
1195 mount_enter_dead(m, false);
1199 case MOUNT_UNMOUNTING_SIGTERM:
1200 if (m->exec_context.send_sigkill) {
1201 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1202 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1204 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1206 if (m->from_proc_self_mountinfo)
1207 mount_enter_mounted(m, false);
1209 mount_enter_dead(m, false);
1213 case MOUNT_MOUNTING_SIGKILL:
1214 case MOUNT_REMOUNTING_SIGKILL:
1215 case MOUNT_UNMOUNTING_SIGKILL:
1216 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1218 if (m->from_proc_self_mountinfo)
1219 mount_enter_mounted(m, false);
1221 mount_enter_dead(m, false);
1225 assert_not_reached("Timeout at wrong time.");
1229 static int mount_add_one(
1233 const char *options,
1236 bool from_proc_self_mountinfo,
1241 char *e, *w = NULL, *o = NULL, *f = NULL;
1250 assert(!set_flags || from_proc_self_mountinfo);
1252 /* Ignore API mount points. They should never be referenced in
1253 * dependencies ever. */
1254 if (mount_point_is_api(where))
1256 if (mount_point_ignore(where))
1259 if (streq(fstype, "autofs"))
1262 /* probably some kind of swap, ignore */
1263 if (!is_path(where))
1266 if (!(e = unit_name_from_path(where, ".mount")))
1269 if (!(u = manager_get_unit(m, e))) {
1272 if (!(u = unit_new(m))) {
1277 r = unit_add_name(u, e);
1283 if (!(MOUNT(u)->where = strdup(where))) {
1288 unit_add_to_load_queue(u);
1294 if (!(w = strdup(what)) ||
1295 !(o = strdup(options)) ||
1296 !(f = strdup(fstype))) {
1301 if (from_proc_self_mountinfo) {
1302 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1305 MOUNT(u)->is_mounted = true;
1306 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1307 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1310 MOUNT(u)->from_proc_self_mountinfo = true;
1312 p = &MOUNT(u)->parameters_etc_fstab;
1313 MOUNT(u)->from_etc_fstab = true;
1327 unit_add_to_dbus_queue(u);
1342 static int mount_find_pri(char *options) {
1346 if (!(pri = mount_test_option(options, "pri=")))
1352 r = strtoul(pri, &end, 10);
1357 if (end == pri || (*end != ',' && *end != 0))
1363 static int mount_load_etc_fstab(Manager *m) {
1371 if (!(f = setmntent("/etc/fstab", "r")))
1374 while ((me = getmntent(f))) {
1378 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1383 if (!(where = strdup(me->mnt_dir))) {
1390 path_kill_slashes(what);
1392 if (where[0] == '/')
1393 path_kill_slashes(where);
1395 if (streq(me->mnt_type, "swap")) {
1398 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1405 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1406 !!mount_test_option(me->mnt_opts, "nofail"),
1407 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1410 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1425 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1428 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1432 rewind(m->proc_self_mountinfo);
1437 device = path = options = options2 = fstype = d = p = o = NULL;
1439 if ((k = fscanf(m->proc_self_mountinfo,
1440 "%*s " /* (1) mount id */
1441 "%*s " /* (2) parent id */
1442 "%*s " /* (3) major:minor */
1443 "%*s " /* (4) root */
1444 "%ms " /* (5) mount point */
1445 "%ms" /* (6) mount options */
1446 "%*[^-]" /* (7) optional fields */
1447 "- " /* (8) separator */
1448 "%ms " /* (9) file system type */
1449 "%ms" /* (10) mount source */
1450 "%ms" /* (11) mount options 2 */
1451 "%*[^\n]", /* some rubbish at the end */
1461 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1465 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1470 if (!(d = cunescape(device)) ||
1471 !(p = cunescape(path))) {
1476 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1503 static void mount_shutdown(Manager *m) {
1506 if (m->proc_self_mountinfo) {
1507 fclose(m->proc_self_mountinfo);
1508 m->proc_self_mountinfo = NULL;
1512 static int mount_enumerate(Manager *m) {
1514 struct epoll_event ev;
1517 if (!m->proc_self_mountinfo) {
1518 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1521 m->mount_watch.type = WATCH_MOUNT;
1522 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1525 ev.events = EPOLLPRI;
1526 ev.data.ptr = &m->mount_watch;
1528 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1532 if ((r = mount_load_etc_fstab(m)) < 0)
1535 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1545 void mount_fd_event(Manager *m, int events) {
1550 assert(events & EPOLLPRI);
1552 /* The manager calls this for every fd event happening on the
1553 * /proc/self/mountinfo file, which informs us about mounting
1556 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1557 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1559 /* Reset flags, just in case, for later calls */
1560 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1561 Mount *mount = (Mount*) meta;
1563 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1569 manager_dispatch_load_queue(m);
1571 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1572 Mount *mount = (Mount*) meta;
1574 if (!mount->is_mounted) {
1575 /* This has just been unmounted. */
1577 mount->from_proc_self_mountinfo = false;
1579 switch (mount->state) {
1582 mount_enter_dead(mount, true);
1586 mount_set_state(mount, mount->state);
1591 } else if (mount->just_mounted || mount->just_changed) {
1593 /* New or changed mount entry */
1595 switch (mount->state) {
1599 mount_enter_mounted(mount, true);
1602 case MOUNT_MOUNTING:
1603 mount_enter_mounting_done(mount);
1607 /* Nothing really changed, but let's
1608 * issue an notification call
1609 * nonetheless, in case somebody is
1610 * waiting for this. (e.g. file system
1611 * ro/rw remounts.) */
1612 mount_set_state(mount, mount->state);
1617 /* Reset the flags for later calls */
1618 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1622 static void mount_reset_failed(Unit *u) {
1623 Mount *m = MOUNT(u);
1627 if (m->state == MOUNT_FAILED)
1628 mount_set_state(m, MOUNT_DEAD);
1633 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1634 Mount *m = MOUNT(u);
1636 Set *pid_set = NULL;
1640 if (who == KILL_MAIN) {
1641 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1645 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1646 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1650 if (m->control_pid > 0)
1651 if (kill(mode == KILL_PROCESS_GROUP ? -m->control_pid : m->control_pid, signo) < 0)
1654 if (mode == KILL_CONTROL_GROUP) {
1657 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1660 /* Exclude the control pid from being killed via the cgroup */
1661 if (m->control_pid > 0)
1662 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1667 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, pid_set)) < 0)
1668 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1679 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1680 [MOUNT_DEAD] = "dead",
1681 [MOUNT_MOUNTING] = "mounting",
1682 [MOUNT_MOUNTING_DONE] = "mounting-done",
1683 [MOUNT_MOUNTED] = "mounted",
1684 [MOUNT_REMOUNTING] = "remounting",
1685 [MOUNT_UNMOUNTING] = "unmounting",
1686 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1687 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1688 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1689 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1690 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1691 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1692 [MOUNT_FAILED] = "failed"
1695 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1697 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1698 [MOUNT_EXEC_MOUNT] = "ExecMount",
1699 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1700 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1703 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1705 const UnitVTable mount_vtable = {
1709 .no_instances = true,
1711 .show_status = true,
1717 .coldplug = mount_coldplug,
1721 .start = mount_start,
1723 .reload = mount_reload,
1727 .serialize = mount_serialize,
1728 .deserialize_item = mount_deserialize_item,
1730 .active_state = mount_active_state,
1731 .sub_state_to_string = mount_sub_state_to_string,
1733 .check_gc = mount_check_gc,
1735 .sigchld_event = mount_sigchld_event,
1736 .timer_event = mount_timer_event,
1738 .reset_failed = mount_reset_failed,
1740 .bus_interface = "org.freedesktop.systemd1.Mount",
1741 .bus_message_handler = bus_mount_message_handler,
1742 .bus_invalidating_properties = bus_mount_invalidating_properties,
1744 .enumerate = mount_enumerate,
1745 .shutdown = mount_shutdown