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"
42 static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
43 [MOUNT_DEAD] = UNIT_INACTIVE,
44 [MOUNT_MOUNTING] = UNIT_ACTIVATING,
45 [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
46 [MOUNT_MOUNTED] = UNIT_ACTIVE,
47 [MOUNT_REMOUNTING] = UNIT_RELOADING,
48 [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
49 [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
50 [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
51 [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
52 [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
53 [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
54 [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
55 [MOUNT_FAILED] = UNIT_FAILED
58 static void mount_init(Unit *u) {
62 assert(u->meta.load_state == UNIT_STUB);
64 m->timeout_usec = DEFAULT_TIMEOUT_USEC;
65 m->directory_mode = 0755;
67 exec_context_init(&m->exec_context);
69 /* The stdio/kmsg bridge socket is on /, in order to avoid a
70 * dep loop, don't use kmsg logging for -.mount */
71 if (!unit_has_name(u, "-.mount"))
72 m->exec_context.std_output = EXEC_OUTPUT_KMSG;
74 /* We need to make sure that /bin/mount is always called in
75 * the same process group as us, so that the autofs kernel
76 * side doesn't send us another mount request while we are
77 * already trying to comply its last one. */
78 m->exec_context.same_pgrp = true;
80 m->timer_watch.type = WATCH_INVALID;
82 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
84 m->meta.ignore_on_isolate = true;
87 static void mount_unwatch_control_pid(Mount *m) {
90 if (m->control_pid <= 0)
93 unit_unwatch_pid(UNIT(m), m->control_pid);
97 static void mount_parameters_done(MountParameters *p) {
104 p->what = p->options = p->fstype = NULL;
107 static void mount_done(Unit *u) {
116 /* Try to detach us from the automount unit if there is any */
117 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
118 Automount *a = (Automount*) other;
124 mount_parameters_done(&m->parameters_etc_fstab);
125 mount_parameters_done(&m->parameters_proc_self_mountinfo);
126 mount_parameters_done(&m->parameters_fragment);
128 exec_context_done(&m->exec_context);
129 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
130 m->control_command = NULL;
132 mount_unwatch_control_pid(m);
134 unit_unwatch_timer(u, &m->timer_watch);
137 static MountParameters* get_mount_parameters_configured(Mount *m) {
140 if (m->from_fragment)
141 return &m->parameters_fragment;
142 else if (m->from_etc_fstab)
143 return &m->parameters_etc_fstab;
148 static MountParameters* get_mount_parameters(Mount *m) {
151 if (m->from_proc_self_mountinfo)
152 return &m->parameters_proc_self_mountinfo;
154 return get_mount_parameters_configured(m);
157 static int mount_add_mount_links(Mount *m) {
164 pm = get_mount_parameters_configured(m);
166 /* Adds in links to other mount points that might lie below or
167 * above us in the hierarchy */
169 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
170 Mount *n = (Mount*) other;
176 if (n->meta.load_state != UNIT_LOADED)
179 pn = get_mount_parameters_configured(n);
181 if (path_startswith(m->where, n->where)) {
183 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
187 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
190 } else if (path_startswith(n->where, m->where)) {
192 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
196 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
199 } else if (pm && path_startswith(pm->what, n->where)) {
201 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
204 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
207 } else if (pn && path_startswith(pn->what, m->where)) {
209 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
212 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
220 static int mount_add_swap_links(Mount *m) {
226 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
227 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
233 static int mount_add_path_links(Mount *m) {
239 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
240 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
246 static int mount_add_automount_links(Mount *m) {
252 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
253 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
259 static int mount_add_socket_links(Mount *m) {
265 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
266 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
272 static char* mount_test_option(const char *haystack, const char *needle) {
277 /* Like glibc's hasmntopt(), but works on a string, not a
284 me.mnt_opts = (char*) haystack;
286 return hasmntopt(&me, needle);
289 static bool mount_is_network(MountParameters *p) {
292 if (mount_test_option(p->options, "_netdev"))
295 if (p->fstype && fstype_is_network(p->fstype))
301 static bool mount_is_bind(MountParameters *p) {
304 if (mount_test_option(p->options, "bind"))
307 if (p->fstype && streq(p->fstype, "bind"))
313 static bool needs_quota(MountParameters *p) {
316 if (mount_is_network(p))
319 if (mount_is_bind(p))
322 return mount_test_option(p->options, "usrquota") ||
323 mount_test_option(p->options, "grpquota");
326 static int mount_add_target_links(Mount *m) {
327 const char *target, *after = NULL;
331 bool noauto, nofail, handle, automount;
335 if (!(p = get_mount_parameters_configured(m)))
338 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
339 nofail = !!mount_test_option(p->options, "nofail");
341 mount_test_option(p->options, "comment=systemd.mount") ||
342 mount_test_option(p->options, "x-systemd-mount") ||
343 m->meta.manager->mount_auto;
345 mount_test_option(p->options, "comment=systemd.automount") ||
346 mount_test_option(p->options, "x-systemd-automount");
348 if (mount_is_network(p)) {
349 target = SPECIAL_REMOTE_FS_TARGET;
351 if (m->meta.manager->running_as == MANAGER_SYSTEM)
352 after = SPECIAL_NETWORK_TARGET;
354 target = SPECIAL_LOCAL_FS_TARGET;
356 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
360 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
363 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
366 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
369 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
372 /* Automatically add mount points that aren't natively
373 * configured to local-fs.target */
378 m->meta.manager->running_as == MANAGER_SYSTEM)
379 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
382 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
386 static int mount_add_device_links(Mount *m) {
392 if (!(p = get_mount_parameters_configured(m)))
398 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
401 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
402 nofail = !!mount_test_option(p->options, "nofail");
404 if ((r = unit_add_node_link(UNIT(m), p->what,
406 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
412 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
413 !path_equal(m->where, "/")) {
416 /* Let's add in the fsck service */
418 /* aka SPECIAL_FSCK_SERVICE */
419 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
422 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
423 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
430 SERVICE(fsck)->fsck_passno = p->passno;
432 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
439 static int mount_add_default_dependencies(Mount *m) {
444 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
445 !path_equal(m->where, "/")) {
448 p = get_mount_parameters_configured(m);
450 if (p && needs_quota(p)) {
451 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
452 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
456 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
463 static int mount_verify(Mount *m) {
468 if (m->meta.load_state != UNIT_LOADED)
471 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
474 if (!(e = unit_name_from_path(m->where, ".mount")))
477 b = unit_has_name(UNIT(m), e);
481 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
485 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
486 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
490 if (m->meta.fragment_path && !m->parameters_fragment.what) {
491 log_error("%s's What setting is missing. Refusing.", m->meta.id);
495 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
496 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
503 static int mount_load(Unit *u) {
508 assert(u->meta.load_state == UNIT_STUB);
510 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
513 /* This is a new unit? Then let's add in some extras */
514 if (u->meta.load_state == UNIT_LOADED) {
515 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
518 if (m->meta.fragment_path)
519 m->from_fragment = true;
522 if (!(m->where = unit_name_to_path(u->meta.id)))
525 path_kill_slashes(m->where);
527 if (!m->meta.description)
528 if ((r = unit_set_description(u, m->where)) < 0)
531 if ((r = mount_add_device_links(m)) < 0)
534 if ((r = mount_add_mount_links(m)) < 0)
537 if ((r = mount_add_socket_links(m)) < 0)
540 if ((r = mount_add_swap_links(m)) < 0)
543 if ((r = mount_add_path_links(m)) < 0)
546 if ((r = mount_add_automount_links(m)) < 0)
549 if ((r = mount_add_target_links(m)) < 0)
552 if ((r = unit_add_default_cgroups(u)) < 0)
555 if (m->meta.default_dependencies)
556 if ((r = mount_add_default_dependencies(m)) < 0)
560 return mount_verify(m);
563 static int mount_notify_automount(Mount *m, int status) {
569 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
570 return r == -ENOENT ? 0 : r;
572 return automount_send_ready(AUTOMOUNT(p), status);
575 static void mount_set_state(Mount *m, MountState state) {
576 MountState old_state;
579 old_state = m->state;
582 if (state != MOUNT_MOUNTING &&
583 state != MOUNT_MOUNTING_DONE &&
584 state != MOUNT_REMOUNTING &&
585 state != MOUNT_UNMOUNTING &&
586 state != MOUNT_MOUNTING_SIGTERM &&
587 state != MOUNT_MOUNTING_SIGKILL &&
588 state != MOUNT_UNMOUNTING_SIGTERM &&
589 state != MOUNT_UNMOUNTING_SIGKILL &&
590 state != MOUNT_REMOUNTING_SIGTERM &&
591 state != MOUNT_REMOUNTING_SIGKILL) {
592 unit_unwatch_timer(UNIT(m), &m->timer_watch);
593 mount_unwatch_control_pid(m);
594 m->control_command = NULL;
595 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
598 if (state == MOUNT_MOUNTED ||
599 state == MOUNT_REMOUNTING)
600 mount_notify_automount(m, 0);
601 else if (state == MOUNT_DEAD ||
602 state == MOUNT_UNMOUNTING ||
603 state == MOUNT_MOUNTING_SIGTERM ||
604 state == MOUNT_MOUNTING_SIGKILL ||
605 state == MOUNT_REMOUNTING_SIGTERM ||
606 state == MOUNT_REMOUNTING_SIGKILL ||
607 state == MOUNT_UNMOUNTING_SIGTERM ||
608 state == MOUNT_UNMOUNTING_SIGKILL ||
609 state == MOUNT_FAILED)
610 mount_notify_automount(m, -ENODEV);
612 if (state != old_state)
613 log_debug("%s changed %s -> %s",
615 mount_state_to_string(old_state),
616 mount_state_to_string(state));
618 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
619 m->reload_failure = false;
622 static int mount_coldplug(Unit *u) {
624 MountState new_state = MOUNT_DEAD;
628 assert(m->state == MOUNT_DEAD);
630 if (m->deserialized_state != m->state)
631 new_state = m->deserialized_state;
632 else if (m->from_proc_self_mountinfo)
633 new_state = MOUNT_MOUNTED;
635 if (new_state != m->state) {
637 if (new_state == MOUNT_MOUNTING ||
638 new_state == MOUNT_MOUNTING_DONE ||
639 new_state == MOUNT_REMOUNTING ||
640 new_state == MOUNT_UNMOUNTING ||
641 new_state == MOUNT_MOUNTING_SIGTERM ||
642 new_state == MOUNT_MOUNTING_SIGKILL ||
643 new_state == MOUNT_UNMOUNTING_SIGTERM ||
644 new_state == MOUNT_UNMOUNTING_SIGKILL ||
645 new_state == MOUNT_REMOUNTING_SIGTERM ||
646 new_state == MOUNT_REMOUNTING_SIGKILL) {
648 if (m->control_pid <= 0)
651 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
654 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
658 mount_set_state(m, new_state);
664 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
671 p = get_mount_parameters(m);
674 "%sMount State: %s\n"
677 "%sFile System Type: %s\n"
679 "%sFrom /etc/fstab: %s\n"
680 "%sFrom /proc/self/mountinfo: %s\n"
681 "%sFrom fragment: %s\n"
682 "%sDirectoryMode: %04o\n",
683 prefix, mount_state_to_string(m->state),
685 prefix, strna(p->what),
686 prefix, strna(p->fstype),
687 prefix, strna(p->options),
688 prefix, yes_no(m->from_etc_fstab),
689 prefix, yes_no(m->from_proc_self_mountinfo),
690 prefix, yes_no(m->from_fragment),
691 prefix, m->directory_mode);
693 if (m->control_pid > 0)
695 "%sControl PID: %lu\n",
696 prefix, (unsigned long) m->control_pid);
698 exec_context_dump(&m->exec_context, f, prefix);
701 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
709 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
712 if ((r = exec_spawn(c,
716 m->meta.manager->environment,
720 m->meta.manager->confirm_spawn,
721 m->meta.cgroup_bondings,
725 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
726 /* FIXME: we need to do something here */
734 unit_unwatch_timer(UNIT(m), &m->timer_watch);
739 static void mount_enter_dead(Mount *m, bool success) {
745 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
748 static void mount_enter_mounted(Mount *m, bool success) {
754 mount_set_state(m, MOUNT_MOUNTED);
757 static void mount_enter_signal(Mount *m, MountState state, bool success) {
760 bool wait_for_exit = false;
767 if (m->exec_context.kill_mode != KILL_NONE) {
768 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
769 state == MOUNT_UNMOUNTING_SIGTERM ||
770 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
772 if (m->control_pid > 0) {
773 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
775 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
777 wait_for_exit = true;
780 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
782 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
787 /* Exclude the control pid from being killed via the cgroup */
788 if (m->control_pid > 0)
789 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
792 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
793 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
794 log_warning("Failed to kill control group: %s", strerror(-r));
796 wait_for_exit = true;
804 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
807 mount_set_state(m, state);
808 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
809 mount_enter_mounted(m, true);
811 mount_enter_dead(m, true);
816 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
818 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
819 mount_enter_mounted(m, false);
821 mount_enter_dead(m, false);
827 static void mount_enter_unmounting(Mount *m, bool success) {
835 m->control_command_id = MOUNT_EXEC_UNMOUNT;
836 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
838 if ((r = exec_command_set(
845 mount_unwatch_control_pid(m);
847 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
850 mount_set_state(m, MOUNT_UNMOUNTING);
855 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
856 mount_enter_mounted(m, false);
859 static void mount_enter_mounting(Mount *m) {
865 m->control_command_id = MOUNT_EXEC_MOUNT;
866 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
868 mkdir_p(m->where, m->directory_mode);
870 /* Create the source directory for bind-mounts if needed */
871 p = get_mount_parameters_configured(m);
872 if (p && mount_is_bind(p))
873 mkdir_p(p->what, m->directory_mode);
875 if (m->from_fragment)
876 r = exec_command_set(
879 m->parameters_fragment.what,
881 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
882 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
884 else if (m->from_etc_fstab)
885 r = exec_command_set(
896 mount_unwatch_control_pid(m);
898 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
901 mount_set_state(m, MOUNT_MOUNTING);
906 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
907 mount_enter_dead(m, false);
910 static void mount_enter_mounting_done(Mount *m) {
913 mount_set_state(m, MOUNT_MOUNTING_DONE);
916 static void mount_enter_remounting(Mount *m, bool success) {
924 m->control_command_id = MOUNT_EXEC_REMOUNT;
925 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
927 if (m->from_fragment) {
931 if (m->parameters_fragment.options) {
932 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
941 r = exec_command_set(
944 m->parameters_fragment.what,
946 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
951 } else if (m->from_etc_fstab)
952 r = exec_command_set(
964 mount_unwatch_control_pid(m);
966 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
969 mount_set_state(m, MOUNT_REMOUNTING);
974 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
975 m->reload_failure = true;
976 mount_enter_mounted(m, true);
979 static int mount_start(Unit *u) {
984 /* We cannot fulfill this request right now, try again later
986 if (m->state == MOUNT_UNMOUNTING ||
987 m->state == MOUNT_UNMOUNTING_SIGTERM ||
988 m->state == MOUNT_UNMOUNTING_SIGKILL ||
989 m->state == MOUNT_MOUNTING_SIGTERM ||
990 m->state == MOUNT_MOUNTING_SIGKILL)
994 if (m->state == MOUNT_MOUNTING)
997 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
1000 mount_enter_mounting(m);
1004 static int mount_stop(Unit *u) {
1005 Mount *m = MOUNT(u);
1010 if (m->state == MOUNT_UNMOUNTING ||
1011 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1012 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1013 m->state == MOUNT_MOUNTING_SIGTERM ||
1014 m->state == MOUNT_MOUNTING_SIGKILL)
1017 assert(m->state == MOUNT_MOUNTING ||
1018 m->state == MOUNT_MOUNTING_DONE ||
1019 m->state == MOUNT_MOUNTED ||
1020 m->state == MOUNT_REMOUNTING ||
1021 m->state == MOUNT_REMOUNTING_SIGTERM ||
1022 m->state == MOUNT_REMOUNTING_SIGKILL);
1024 mount_enter_unmounting(m, true);
1028 static int mount_reload(Unit *u) {
1029 Mount *m = MOUNT(u);
1033 if (m->state == MOUNT_MOUNTING_DONE)
1036 assert(m->state == MOUNT_MOUNTED);
1038 mount_enter_remounting(m, true);
1042 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1043 Mount *m = MOUNT(u);
1049 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1050 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1052 if (m->control_pid > 0)
1053 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1055 if (m->control_command_id >= 0)
1056 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1061 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1062 Mount *m = MOUNT(u);
1069 if (streq(key, "state")) {
1072 if ((state = mount_state_from_string(value)) < 0)
1073 log_debug("Failed to parse state value %s", value);
1075 m->deserialized_state = state;
1076 } else if (streq(key, "failure")) {
1079 if ((b = parse_boolean(value)) < 0)
1080 log_debug("Failed to parse failure value %s", value);
1082 m->failure = b || m->failure;
1084 } else if (streq(key, "control-pid")) {
1087 if (parse_pid(value, &pid) < 0)
1088 log_debug("Failed to parse control-pid value %s", value);
1090 m->control_pid = pid;
1091 } else if (streq(key, "control-command")) {
1092 MountExecCommand id;
1094 if ((id = mount_exec_command_from_string(value)) < 0)
1095 log_debug("Failed to parse exec-command value %s", value);
1097 m->control_command_id = id;
1098 m->control_command = m->exec_command + id;
1102 log_debug("Unknown serialization key '%s'", key);
1107 static UnitActiveState mount_active_state(Unit *u) {
1110 return state_translation_table[MOUNT(u)->state];
1113 static const char *mount_sub_state_to_string(Unit *u) {
1116 return mount_state_to_string(MOUNT(u)->state);
1119 static bool mount_check_gc(Unit *u) {
1120 Mount *m = MOUNT(u);
1124 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1127 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1128 Mount *m = MOUNT(u);
1134 if (pid != m->control_pid)
1139 success = is_clean_exit(code, status);
1140 m->failure = m->failure || !success;
1142 if (m->control_command) {
1143 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1144 m->control_command = NULL;
1145 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1148 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1149 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1151 /* Note that mount(8) returning and the kernel sending us a
1152 * mount table change event might happen out-of-order. If an
1153 * operation succeed we assume the kernel will follow soon too
1154 * and already change into the resulting state. If it fails
1155 * we check if the kernel still knows about the mount. and
1156 * change state accordingly. */
1160 case MOUNT_MOUNTING:
1161 case MOUNT_MOUNTING_DONE:
1162 case MOUNT_MOUNTING_SIGKILL:
1163 case MOUNT_MOUNTING_SIGTERM:
1166 mount_enter_mounted(m, true);
1167 else if (m->from_proc_self_mountinfo)
1168 mount_enter_mounted(m, false);
1170 mount_enter_dead(m, false);
1173 case MOUNT_REMOUNTING:
1174 case MOUNT_REMOUNTING_SIGKILL:
1175 case MOUNT_REMOUNTING_SIGTERM:
1177 m->reload_failure = !success;
1178 if (m->from_proc_self_mountinfo)
1179 mount_enter_mounted(m, true);
1181 mount_enter_dead(m, true);
1185 case MOUNT_UNMOUNTING:
1186 case MOUNT_UNMOUNTING_SIGKILL:
1187 case MOUNT_UNMOUNTING_SIGTERM:
1190 mount_enter_dead(m, true);
1191 else if (m->from_proc_self_mountinfo)
1192 mount_enter_mounted(m, false);
1194 mount_enter_dead(m, false);
1198 assert_not_reached("Uh, control process died at wrong time.");
1201 /* Notify clients about changed exit status */
1202 unit_add_to_dbus_queue(u);
1205 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1206 Mount *m = MOUNT(u);
1209 assert(elapsed == 1);
1210 assert(w == &m->timer_watch);
1214 case MOUNT_MOUNTING:
1215 case MOUNT_MOUNTING_DONE:
1216 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1217 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1220 case MOUNT_REMOUNTING:
1221 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1222 m->reload_failure = true;
1223 mount_enter_mounted(m, true);
1226 case MOUNT_UNMOUNTING:
1227 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1228 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1231 case MOUNT_MOUNTING_SIGTERM:
1232 if (m->exec_context.send_sigkill) {
1233 log_warning("%s mounting timed out. Killing.", u->meta.id);
1234 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1236 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1238 if (m->from_proc_self_mountinfo)
1239 mount_enter_mounted(m, false);
1241 mount_enter_dead(m, false);
1245 case MOUNT_REMOUNTING_SIGTERM:
1246 if (m->exec_context.send_sigkill) {
1247 log_warning("%s remounting timed out. Killing.", u->meta.id);
1248 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1250 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1252 if (m->from_proc_self_mountinfo)
1253 mount_enter_mounted(m, false);
1255 mount_enter_dead(m, false);
1259 case MOUNT_UNMOUNTING_SIGTERM:
1260 if (m->exec_context.send_sigkill) {
1261 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1262 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1264 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1266 if (m->from_proc_self_mountinfo)
1267 mount_enter_mounted(m, false);
1269 mount_enter_dead(m, false);
1273 case MOUNT_MOUNTING_SIGKILL:
1274 case MOUNT_REMOUNTING_SIGKILL:
1275 case MOUNT_UNMOUNTING_SIGKILL:
1276 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1278 if (m->from_proc_self_mountinfo)
1279 mount_enter_mounted(m, false);
1281 mount_enter_dead(m, false);
1285 assert_not_reached("Timeout at wrong time.");
1289 static int mount_add_one(
1293 const char *options,
1296 bool from_proc_self_mountinfo,
1301 char *e, *w = NULL, *o = NULL, *f = NULL;
1310 assert(!set_flags || from_proc_self_mountinfo);
1312 /* Ignore API mount points. They should never be referenced in
1313 * dependencies ever. */
1314 if (mount_point_is_api(where) || mount_point_ignore(where))
1317 if (streq(fstype, "autofs"))
1320 /* probably some kind of swap, ignore */
1321 if (!is_path(where))
1324 if (!(e = unit_name_from_path(where, ".mount")))
1327 if (!(u = manager_get_unit(m, e))) {
1330 if (!(u = unit_new(m))) {
1335 r = unit_add_name(u, e);
1341 if (!(MOUNT(u)->where = strdup(where))) {
1346 unit_add_to_load_queue(u);
1352 if (!(w = strdup(what)) ||
1353 !(o = strdup(options)) ||
1354 !(f = strdup(fstype))) {
1359 if (from_proc_self_mountinfo) {
1360 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1363 MOUNT(u)->is_mounted = true;
1364 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1365 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1368 MOUNT(u)->from_proc_self_mountinfo = true;
1370 p = &MOUNT(u)->parameters_etc_fstab;
1371 MOUNT(u)->from_etc_fstab = true;
1385 unit_add_to_dbus_queue(u);
1400 static int mount_find_pri(char *options) {
1404 if (!(pri = mount_test_option(options, "pri=")))
1410 r = strtoul(pri, &end, 10);
1415 if (end == pri || (*end != ',' && *end != 0))
1421 static int mount_load_etc_fstab(Manager *m) {
1429 if (!(f = setmntent("/etc/fstab", "r")))
1432 while ((me = getmntent(f))) {
1436 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1441 if (!(where = strdup(me->mnt_dir))) {
1448 path_kill_slashes(what);
1450 if (where[0] == '/')
1451 path_kill_slashes(where);
1453 if (streq(me->mnt_type, "swap")) {
1456 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1463 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1464 !!mount_test_option(me->mnt_opts, "nofail"),
1465 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1468 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1483 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1486 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1490 rewind(m->proc_self_mountinfo);
1495 device = path = options = options2 = fstype = d = p = o = NULL;
1497 if ((k = fscanf(m->proc_self_mountinfo,
1498 "%*s " /* (1) mount id */
1499 "%*s " /* (2) parent id */
1500 "%*s " /* (3) major:minor */
1501 "%*s " /* (4) root */
1502 "%ms " /* (5) mount point */
1503 "%ms" /* (6) mount options */
1504 "%*[^-]" /* (7) optional fields */
1505 "- " /* (8) separator */
1506 "%ms " /* (9) file system type */
1507 "%ms" /* (10) mount source */
1508 "%ms" /* (11) mount options 2 */
1509 "%*[^\n]", /* some rubbish at the end */
1519 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1523 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1528 if (!(d = cunescape(device)) ||
1529 !(p = cunescape(path))) {
1534 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1561 static void mount_shutdown(Manager *m) {
1564 if (m->proc_self_mountinfo) {
1565 fclose(m->proc_self_mountinfo);
1566 m->proc_self_mountinfo = NULL;
1570 static int mount_enumerate(Manager *m) {
1572 struct epoll_event ev;
1575 if (!m->proc_self_mountinfo) {
1576 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1579 m->mount_watch.type = WATCH_MOUNT;
1580 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1583 ev.events = EPOLLPRI;
1584 ev.data.ptr = &m->mount_watch;
1586 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1590 if ((r = mount_load_etc_fstab(m)) < 0)
1593 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1603 void mount_fd_event(Manager *m, int events) {
1608 assert(events & EPOLLPRI);
1610 /* The manager calls this for every fd event happening on the
1611 * /proc/self/mountinfo file, which informs us about mounting
1614 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1615 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1617 /* Reset flags, just in case, for later calls */
1618 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1619 Mount *mount = (Mount*) meta;
1621 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1627 manager_dispatch_load_queue(m);
1629 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1630 Mount *mount = (Mount*) meta;
1632 if (!mount->is_mounted) {
1633 /* This has just been unmounted. */
1635 mount->from_proc_self_mountinfo = false;
1637 switch (mount->state) {
1640 mount_enter_dead(mount, true);
1644 mount_set_state(mount, mount->state);
1649 } else if (mount->just_mounted || mount->just_changed) {
1651 /* New or changed mount entry */
1653 switch (mount->state) {
1657 mount_enter_mounted(mount, true);
1660 case MOUNT_MOUNTING:
1661 mount_enter_mounting_done(mount);
1665 /* Nothing really changed, but let's
1666 * issue an notification call
1667 * nonetheless, in case somebody is
1668 * waiting for this. (e.g. file system
1669 * ro/rw remounts.) */
1670 mount_set_state(mount, mount->state);
1675 /* Reset the flags for later calls */
1676 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1680 static void mount_reset_failed(Unit *u) {
1681 Mount *m = MOUNT(u);
1685 if (m->state == MOUNT_FAILED)
1686 mount_set_state(m, MOUNT_DEAD);
1691 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1692 Mount *m = MOUNT(u);
1694 Set *pid_set = NULL;
1698 if (who == KILL_MAIN) {
1699 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1703 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1704 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1708 if (m->control_pid > 0)
1709 if (kill(m->control_pid, signo) < 0)
1712 if (mode == KILL_CONTROL_GROUP) {
1715 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1718 /* Exclude the control pid from being killed via the cgroup */
1719 if (m->control_pid > 0)
1720 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1725 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1726 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1737 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1738 [MOUNT_DEAD] = "dead",
1739 [MOUNT_MOUNTING] = "mounting",
1740 [MOUNT_MOUNTING_DONE] = "mounting-done",
1741 [MOUNT_MOUNTED] = "mounted",
1742 [MOUNT_REMOUNTING] = "remounting",
1743 [MOUNT_UNMOUNTING] = "unmounting",
1744 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1745 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1746 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1747 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1748 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1749 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1750 [MOUNT_FAILED] = "failed"
1753 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1755 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1756 [MOUNT_EXEC_MOUNT] = "ExecMount",
1757 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1758 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1761 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1763 const UnitVTable mount_vtable = {
1767 .no_instances = true,
1768 .show_status = true,
1774 .coldplug = mount_coldplug,
1778 .start = mount_start,
1780 .reload = mount_reload,
1784 .serialize = mount_serialize,
1785 .deserialize_item = mount_deserialize_item,
1787 .active_state = mount_active_state,
1788 .sub_state_to_string = mount_sub_state_to_string,
1790 .check_gc = mount_check_gc,
1792 .sigchld_event = mount_sigchld_event,
1793 .timer_event = mount_timer_event,
1795 .reset_failed = mount_reset_failed,
1797 .bus_interface = "org.freedesktop.systemd1.Mount",
1798 .bus_message_handler = bus_mount_message_handler,
1799 .bus_invalidating_properties = bus_mount_invalidating_properties,
1801 .enumerate = mount_enumerate,
1802 .shutdown = mount_shutdown