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);
68 m->exec_context.std_output = EXEC_OUTPUT_KMSG;
70 /* We need to make sure that /bin/mount is always called in
71 * the same process group as us, so that the autofs kernel
72 * side doesn't send us another mount request while we are
73 * already trying to comply its last one. */
74 m->exec_context.same_pgrp = true;
76 m->timer_watch.type = WATCH_INVALID;
78 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
81 static void mount_unwatch_control_pid(Mount *m) {
84 if (m->control_pid <= 0)
87 unit_unwatch_pid(UNIT(m), m->control_pid);
91 static void mount_parameters_done(MountParameters *p) {
98 p->what = p->options = p->fstype = NULL;
101 static void mount_done(Unit *u) {
110 /* Try to detach us from the automount unit if there is any */
111 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT]) {
112 Automount *a = (Automount*) other;
118 mount_parameters_done(&m->parameters_etc_fstab);
119 mount_parameters_done(&m->parameters_proc_self_mountinfo);
120 mount_parameters_done(&m->parameters_fragment);
122 exec_context_done(&m->exec_context);
123 exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
124 m->control_command = NULL;
126 mount_unwatch_control_pid(m);
128 unit_unwatch_timer(u, &m->timer_watch);
131 static MountParameters* get_mount_parameters_configured(Mount *m) {
134 if (m->from_fragment)
135 return &m->parameters_fragment;
136 else if (m->from_etc_fstab)
137 return &m->parameters_etc_fstab;
142 static MountParameters* get_mount_parameters(Mount *m) {
145 if (m->from_proc_self_mountinfo)
146 return &m->parameters_proc_self_mountinfo;
148 return get_mount_parameters_configured(m);
151 static int mount_add_mount_links(Mount *m) {
158 pm = get_mount_parameters_configured(m);
160 /* Adds in links to other mount points that might lie below or
161 * above us in the hierarchy */
163 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
164 Mount *n = (Mount*) other;
170 if (n->meta.load_state != UNIT_LOADED)
173 pn = get_mount_parameters_configured(n);
175 if (path_startswith(m->where, n->where)) {
177 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
181 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
184 } else if (path_startswith(n->where, m->where)) {
186 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
190 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
193 } else if (pm && path_startswith(pm->what, n->where)) {
195 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
198 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
201 } else if (pn && path_startswith(pn->what, m->where)) {
203 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
206 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
214 static int mount_add_swap_links(Mount *m) {
220 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
221 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
227 static int mount_add_path_links(Mount *m) {
233 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
234 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
240 static int mount_add_automount_links(Mount *m) {
246 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
247 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
253 static int mount_add_socket_links(Mount *m) {
259 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
260 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
266 static char* mount_test_option(const char *haystack, const char *needle) {
271 /* Like glibc's hasmntopt(), but works on a string, not a
278 me.mnt_opts = (char*) haystack;
280 return hasmntopt(&me, needle);
283 static bool mount_is_network(MountParameters *p) {
286 if (mount_test_option(p->options, "_netdev"))
289 if (p->fstype && fstype_is_network(p->fstype))
295 static bool mount_is_bind(MountParameters *p) {
298 if (mount_test_option(p->options, "bind"))
301 if (p->fstype && streq(p->fstype, "bind"))
307 static bool needs_quota(MountParameters *p) {
310 if (mount_is_network(p))
313 if (mount_is_bind(p))
316 return mount_test_option(p->options, "usrquota") ||
317 mount_test_option(p->options, "grpquota");
320 static int mount_add_target_links(Mount *m) {
321 const char *target, *after = NULL;
325 bool noauto, nofail, handle, automount;
329 if (!(p = get_mount_parameters_configured(m)))
332 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
333 nofail = !!mount_test_option(p->options, "nofail");
335 mount_test_option(p->options, "comment=systemd.mount") ||
336 mount_test_option(p->options, "x-systemd-mount") ||
337 m->meta.manager->mount_auto;
339 mount_test_option(p->options, "comment=systemd.automount") ||
340 mount_test_option(p->options, "x-systemd-automount");
342 if (mount_is_network(p)) {
343 target = SPECIAL_REMOTE_FS_TARGET;
345 if (m->meta.manager->running_as == MANAGER_SYSTEM)
346 after = SPECIAL_NETWORK_TARGET;
348 target = SPECIAL_LOCAL_FS_TARGET;
350 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
354 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
357 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
360 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
363 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
366 /* Automatically add mount points that aren't natively
367 * configured to local-fs.target */
372 m->meta.manager->running_as == MANAGER_SYSTEM)
373 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
376 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
380 static int mount_add_device_links(Mount *m) {
386 if (!(p = get_mount_parameters_configured(m)))
392 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
395 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
396 nofail = !!mount_test_option(p->options, "nofail");
398 if ((r = unit_add_node_link(UNIT(m), p->what,
400 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
406 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
407 !path_equal(m->where, "/")) {
410 /* Let's add in the fsck service */
412 /* aka SPECIAL_FSCK_SERVICE */
413 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
416 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
417 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
424 SERVICE(fsck)->fsck_passno = p->passno;
426 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
433 static int mount_add_default_dependencies(Mount *m) {
438 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
439 !path_equal(m->where, "/")) {
442 p = get_mount_parameters_configured(m);
444 if (p && needs_quota(p)) {
445 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
446 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
450 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
457 static int mount_verify(Mount *m) {
462 if (m->meta.load_state != UNIT_LOADED)
465 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
468 if (!(e = unit_name_from_path(m->where, ".mount")))
471 b = unit_has_name(UNIT(m), e);
475 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
479 if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
480 log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
484 if (m->meta.fragment_path && !m->parameters_fragment.what) {
485 log_error("%s's What setting is missing. Refusing.", m->meta.id);
489 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
490 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
497 static int mount_load(Unit *u) {
502 assert(u->meta.load_state == UNIT_STUB);
504 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
507 /* This is a new unit? Then let's add in some extras */
508 if (u->meta.load_state == UNIT_LOADED) {
509 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
512 if (m->meta.fragment_path)
513 m->from_fragment = true;
516 if (!(m->where = unit_name_to_path(u->meta.id)))
519 path_kill_slashes(m->where);
521 if (!m->meta.description)
522 if ((r = unit_set_description(u, m->where)) < 0)
525 if ((r = mount_add_device_links(m)) < 0)
528 if ((r = mount_add_mount_links(m)) < 0)
531 if ((r = mount_add_socket_links(m)) < 0)
534 if ((r = mount_add_swap_links(m)) < 0)
537 if ((r = mount_add_path_links(m)) < 0)
540 if ((r = mount_add_automount_links(m)) < 0)
543 if ((r = mount_add_target_links(m)) < 0)
546 if ((r = unit_add_default_cgroups(u)) < 0)
549 if (m->meta.default_dependencies)
550 if ((r = mount_add_default_dependencies(m)) < 0)
554 return mount_verify(m);
557 static int mount_notify_automount(Mount *m, int status) {
563 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
564 return r == -ENOENT ? 0 : r;
566 return automount_send_ready(AUTOMOUNT(p), status);
569 static void mount_set_state(Mount *m, MountState state) {
570 MountState old_state;
573 old_state = m->state;
576 if (state != MOUNT_MOUNTING &&
577 state != MOUNT_MOUNTING_DONE &&
578 state != MOUNT_REMOUNTING &&
579 state != MOUNT_UNMOUNTING &&
580 state != MOUNT_MOUNTING_SIGTERM &&
581 state != MOUNT_MOUNTING_SIGKILL &&
582 state != MOUNT_UNMOUNTING_SIGTERM &&
583 state != MOUNT_UNMOUNTING_SIGKILL &&
584 state != MOUNT_REMOUNTING_SIGTERM &&
585 state != MOUNT_REMOUNTING_SIGKILL) {
586 unit_unwatch_timer(UNIT(m), &m->timer_watch);
587 mount_unwatch_control_pid(m);
588 m->control_command = NULL;
589 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
592 if (state == MOUNT_MOUNTED ||
593 state == MOUNT_REMOUNTING)
594 mount_notify_automount(m, 0);
595 else if (state == MOUNT_DEAD ||
596 state == MOUNT_UNMOUNTING ||
597 state == MOUNT_MOUNTING_SIGTERM ||
598 state == MOUNT_MOUNTING_SIGKILL ||
599 state == MOUNT_REMOUNTING_SIGTERM ||
600 state == MOUNT_REMOUNTING_SIGKILL ||
601 state == MOUNT_UNMOUNTING_SIGTERM ||
602 state == MOUNT_UNMOUNTING_SIGKILL ||
603 state == MOUNT_FAILED)
604 mount_notify_automount(m, -ENODEV);
606 if (state != old_state)
607 log_debug("%s changed %s -> %s",
609 mount_state_to_string(old_state),
610 mount_state_to_string(state));
612 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
613 m->reload_failure = false;
616 static int mount_coldplug(Unit *u) {
618 MountState new_state = MOUNT_DEAD;
622 assert(m->state == MOUNT_DEAD);
624 if (m->deserialized_state != m->state)
625 new_state = m->deserialized_state;
626 else if (m->from_proc_self_mountinfo)
627 new_state = MOUNT_MOUNTED;
629 if (new_state != m->state) {
631 if (new_state == MOUNT_MOUNTING ||
632 new_state == MOUNT_MOUNTING_DONE ||
633 new_state == MOUNT_REMOUNTING ||
634 new_state == MOUNT_UNMOUNTING ||
635 new_state == MOUNT_MOUNTING_SIGTERM ||
636 new_state == MOUNT_MOUNTING_SIGKILL ||
637 new_state == MOUNT_UNMOUNTING_SIGTERM ||
638 new_state == MOUNT_UNMOUNTING_SIGKILL ||
639 new_state == MOUNT_REMOUNTING_SIGTERM ||
640 new_state == MOUNT_REMOUNTING_SIGKILL) {
642 if (m->control_pid <= 0)
645 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
648 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
652 mount_set_state(m, new_state);
658 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
665 p = get_mount_parameters(m);
668 "%sMount State: %s\n"
671 "%sFile System Type: %s\n"
673 "%sFrom /etc/fstab: %s\n"
674 "%sFrom /proc/self/mountinfo: %s\n"
675 "%sFrom fragment: %s\n"
676 "%sDirectoryMode: %04o\n",
677 prefix, mount_state_to_string(m->state),
679 prefix, strna(p->what),
680 prefix, strna(p->fstype),
681 prefix, strna(p->options),
682 prefix, yes_no(m->from_etc_fstab),
683 prefix, yes_no(m->from_proc_self_mountinfo),
684 prefix, yes_no(m->from_fragment),
685 prefix, m->directory_mode);
687 if (m->control_pid > 0)
689 "%sControl PID: %lu\n",
690 prefix, (unsigned long) m->control_pid);
692 exec_context_dump(&m->exec_context, f, prefix);
695 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
703 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
706 if ((r = exec_spawn(c,
710 m->meta.manager->environment,
714 m->meta.manager->confirm_spawn,
715 m->meta.cgroup_bondings,
719 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
720 /* FIXME: we need to do something here */
728 unit_unwatch_timer(UNIT(m), &m->timer_watch);
733 static void mount_enter_dead(Mount *m, bool success) {
739 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
742 static void mount_enter_mounted(Mount *m, bool success) {
748 mount_set_state(m, MOUNT_MOUNTED);
751 static void mount_enter_signal(Mount *m, MountState state, bool success) {
754 bool wait_for_exit = false;
761 if (m->exec_context.kill_mode != KILL_NONE) {
762 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
763 state == MOUNT_UNMOUNTING_SIGTERM ||
764 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
766 if (m->control_pid > 0) {
767 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
769 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
771 wait_for_exit = true;
774 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
776 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
781 /* Exclude the control pid from being killed via the cgroup */
782 if (m->control_pid > 0)
783 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
786 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
787 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
788 log_warning("Failed to kill control group: %s", strerror(-r));
790 wait_for_exit = true;
798 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
801 mount_set_state(m, state);
802 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
803 mount_enter_mounted(m, true);
805 mount_enter_dead(m, true);
810 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
812 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
813 mount_enter_mounted(m, false);
815 mount_enter_dead(m, false);
821 static void mount_enter_unmounting(Mount *m, bool success) {
829 m->control_command_id = MOUNT_EXEC_UNMOUNT;
830 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
832 if ((r = exec_command_set(
839 mount_unwatch_control_pid(m);
841 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
844 mount_set_state(m, MOUNT_UNMOUNTING);
849 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
850 mount_enter_mounted(m, false);
853 static void mount_enter_mounting(Mount *m) {
859 m->control_command_id = MOUNT_EXEC_MOUNT;
860 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
862 mkdir_p(m->where, m->directory_mode);
864 /* Create the source directory for bind-mounts if needed */
865 p = get_mount_parameters_configured(m);
866 if (p && mount_is_bind(p))
867 mkdir_p(p->what, m->directory_mode);
869 if (m->from_fragment)
870 r = exec_command_set(
873 m->parameters_fragment.what,
875 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
876 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
878 else if (m->from_etc_fstab)
879 r = exec_command_set(
890 mount_unwatch_control_pid(m);
892 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
895 mount_set_state(m, MOUNT_MOUNTING);
900 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
901 mount_enter_dead(m, false);
904 static void mount_enter_mounting_done(Mount *m) {
907 mount_set_state(m, MOUNT_MOUNTING_DONE);
910 static void mount_enter_remounting(Mount *m, bool success) {
918 m->control_command_id = MOUNT_EXEC_REMOUNT;
919 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
921 if (m->from_fragment) {
925 if (m->parameters_fragment.options) {
926 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
935 r = exec_command_set(
938 m->parameters_fragment.what,
940 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
945 } else if (m->from_etc_fstab)
946 r = exec_command_set(
958 mount_unwatch_control_pid(m);
960 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
963 mount_set_state(m, MOUNT_REMOUNTING);
968 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
969 m->reload_failure = true;
970 mount_enter_mounted(m, true);
973 static int mount_start(Unit *u) {
978 /* We cannot fulfill this request right now, try again later
980 if (m->state == MOUNT_UNMOUNTING ||
981 m->state == MOUNT_UNMOUNTING_SIGTERM ||
982 m->state == MOUNT_UNMOUNTING_SIGKILL ||
983 m->state == MOUNT_MOUNTING_SIGTERM ||
984 m->state == MOUNT_MOUNTING_SIGKILL)
988 if (m->state == MOUNT_MOUNTING)
991 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
994 mount_enter_mounting(m);
998 static int mount_stop(Unit *u) {
1004 if (m->state == MOUNT_UNMOUNTING ||
1005 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1006 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1007 m->state == MOUNT_MOUNTING_SIGTERM ||
1008 m->state == MOUNT_MOUNTING_SIGKILL)
1011 assert(m->state == MOUNT_MOUNTING ||
1012 m->state == MOUNT_MOUNTING_DONE ||
1013 m->state == MOUNT_MOUNTED ||
1014 m->state == MOUNT_REMOUNTING ||
1015 m->state == MOUNT_REMOUNTING_SIGTERM ||
1016 m->state == MOUNT_REMOUNTING_SIGKILL);
1018 mount_enter_unmounting(m, true);
1022 static int mount_reload(Unit *u) {
1023 Mount *m = MOUNT(u);
1027 if (m->state == MOUNT_MOUNTING_DONE)
1030 assert(m->state == MOUNT_MOUNTED);
1032 mount_enter_remounting(m, true);
1036 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1037 Mount *m = MOUNT(u);
1043 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1044 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1046 if (m->control_pid > 0)
1047 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1049 if (m->control_command_id >= 0)
1050 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1055 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1056 Mount *m = MOUNT(u);
1063 if (streq(key, "state")) {
1066 if ((state = mount_state_from_string(value)) < 0)
1067 log_debug("Failed to parse state value %s", value);
1069 m->deserialized_state = state;
1070 } else if (streq(key, "failure")) {
1073 if ((b = parse_boolean(value)) < 0)
1074 log_debug("Failed to parse failure value %s", value);
1076 m->failure = b || m->failure;
1078 } else if (streq(key, "control-pid")) {
1081 if (parse_pid(value, &pid) < 0)
1082 log_debug("Failed to parse control-pid value %s", value);
1084 m->control_pid = pid;
1085 } else if (streq(key, "control-command")) {
1086 MountExecCommand id;
1088 if ((id = mount_exec_command_from_string(value)) < 0)
1089 log_debug("Failed to parse exec-command value %s", value);
1091 m->control_command_id = id;
1092 m->control_command = m->exec_command + id;
1096 log_debug("Unknown serialization key '%s'", key);
1101 static UnitActiveState mount_active_state(Unit *u) {
1104 return state_translation_table[MOUNT(u)->state];
1107 static const char *mount_sub_state_to_string(Unit *u) {
1110 return mount_state_to_string(MOUNT(u)->state);
1113 static bool mount_check_gc(Unit *u) {
1114 Mount *m = MOUNT(u);
1118 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1121 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1122 Mount *m = MOUNT(u);
1128 if (pid != m->control_pid)
1133 success = is_clean_exit(code, status);
1134 m->failure = m->failure || !success;
1136 if (m->control_command) {
1137 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1138 m->control_command = NULL;
1139 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1142 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1143 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1145 /* Note that mount(8) returning and the kernel sending us a
1146 * mount table change event might happen out-of-order. If an
1147 * operation succeed we assume the kernel will follow soon too
1148 * and already change into the resulting state. If it fails
1149 * we check if the kernel still knows about the mount. and
1150 * change state accordingly. */
1154 case MOUNT_MOUNTING:
1155 case MOUNT_MOUNTING_DONE:
1156 case MOUNT_MOUNTING_SIGKILL:
1157 case MOUNT_MOUNTING_SIGTERM:
1160 mount_enter_mounted(m, true);
1161 else if (m->from_proc_self_mountinfo)
1162 mount_enter_mounted(m, false);
1164 mount_enter_dead(m, false);
1167 case MOUNT_REMOUNTING:
1168 case MOUNT_REMOUNTING_SIGKILL:
1169 case MOUNT_REMOUNTING_SIGTERM:
1171 m->reload_failure = !success;
1172 if (m->from_proc_self_mountinfo)
1173 mount_enter_mounted(m, true);
1175 mount_enter_dead(m, true);
1179 case MOUNT_UNMOUNTING:
1180 case MOUNT_UNMOUNTING_SIGKILL:
1181 case MOUNT_UNMOUNTING_SIGTERM:
1184 mount_enter_dead(m, true);
1185 else if (m->from_proc_self_mountinfo)
1186 mount_enter_mounted(m, false);
1188 mount_enter_dead(m, false);
1192 assert_not_reached("Uh, control process died at wrong time.");
1195 /* Notify clients about changed exit status */
1196 unit_add_to_dbus_queue(u);
1199 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1200 Mount *m = MOUNT(u);
1203 assert(elapsed == 1);
1204 assert(w == &m->timer_watch);
1208 case MOUNT_MOUNTING:
1209 case MOUNT_MOUNTING_DONE:
1210 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1211 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1214 case MOUNT_REMOUNTING:
1215 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1216 m->reload_failure = true;
1217 mount_enter_mounted(m, true);
1220 case MOUNT_UNMOUNTING:
1221 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1222 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1225 case MOUNT_MOUNTING_SIGTERM:
1226 if (m->exec_context.send_sigkill) {
1227 log_warning("%s mounting timed out. Killing.", u->meta.id);
1228 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1230 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1232 if (m->from_proc_self_mountinfo)
1233 mount_enter_mounted(m, false);
1235 mount_enter_dead(m, false);
1239 case MOUNT_REMOUNTING_SIGTERM:
1240 if (m->exec_context.send_sigkill) {
1241 log_warning("%s remounting timed out. Killing.", u->meta.id);
1242 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1244 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1246 if (m->from_proc_self_mountinfo)
1247 mount_enter_mounted(m, false);
1249 mount_enter_dead(m, false);
1253 case MOUNT_UNMOUNTING_SIGTERM:
1254 if (m->exec_context.send_sigkill) {
1255 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1256 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1258 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1260 if (m->from_proc_self_mountinfo)
1261 mount_enter_mounted(m, false);
1263 mount_enter_dead(m, false);
1267 case MOUNT_MOUNTING_SIGKILL:
1268 case MOUNT_REMOUNTING_SIGKILL:
1269 case MOUNT_UNMOUNTING_SIGKILL:
1270 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1272 if (m->from_proc_self_mountinfo)
1273 mount_enter_mounted(m, false);
1275 mount_enter_dead(m, false);
1279 assert_not_reached("Timeout at wrong time.");
1283 static int mount_add_one(
1287 const char *options,
1290 bool from_proc_self_mountinfo,
1295 char *e, *w = NULL, *o = NULL, *f = NULL;
1304 assert(!set_flags || from_proc_self_mountinfo);
1306 /* Ignore API mount points. They should never be referenced in
1307 * dependencies ever. */
1308 if (mount_point_is_api(where) || mount_point_ignore(where))
1311 if (streq(fstype, "autofs"))
1314 /* probably some kind of swap, ignore */
1315 if (!is_path(where))
1318 if (!(e = unit_name_from_path(where, ".mount")))
1321 if (!(u = manager_get_unit(m, e))) {
1324 if (!(u = unit_new(m))) {
1329 r = unit_add_name(u, e);
1335 if (!(MOUNT(u)->where = strdup(where))) {
1340 unit_add_to_load_queue(u);
1346 if (!(w = strdup(what)) ||
1347 !(o = strdup(options)) ||
1348 !(f = strdup(fstype))) {
1353 if (from_proc_self_mountinfo) {
1354 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1357 MOUNT(u)->is_mounted = true;
1358 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1359 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1362 MOUNT(u)->from_proc_self_mountinfo = true;
1364 p = &MOUNT(u)->parameters_etc_fstab;
1365 MOUNT(u)->from_etc_fstab = true;
1379 unit_add_to_dbus_queue(u);
1394 static int mount_find_pri(char *options) {
1398 if (!(pri = mount_test_option(options, "pri=")))
1404 r = strtoul(pri, &end, 10);
1409 if (end == pri || (*end != ',' && *end != 0))
1415 static int mount_load_etc_fstab(Manager *m) {
1423 if (!(f = setmntent("/etc/fstab", "r")))
1426 while ((me = getmntent(f))) {
1430 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1435 if (!(where = strdup(me->mnt_dir))) {
1442 path_kill_slashes(what);
1444 if (where[0] == '/')
1445 path_kill_slashes(where);
1447 if (streq(me->mnt_type, "swap")) {
1450 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1457 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1458 !!mount_test_option(me->mnt_opts, "nofail"),
1459 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1462 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1477 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1480 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1484 rewind(m->proc_self_mountinfo);
1489 device = path = options = options2 = fstype = d = p = o = NULL;
1491 if ((k = fscanf(m->proc_self_mountinfo,
1492 "%*s " /* (1) mount id */
1493 "%*s " /* (2) parent id */
1494 "%*s " /* (3) major:minor */
1495 "%*s " /* (4) root */
1496 "%ms " /* (5) mount point */
1497 "%ms" /* (6) mount options */
1498 "%*[^-]" /* (7) optional fields */
1499 "- " /* (8) separator */
1500 "%ms " /* (9) file system type */
1501 "%ms" /* (10) mount source */
1502 "%ms" /* (11) mount options 2 */
1503 "%*[^\n]", /* some rubbish at the end */
1513 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1517 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1522 if (!(d = cunescape(device)) ||
1523 !(p = cunescape(path))) {
1528 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1555 static void mount_shutdown(Manager *m) {
1558 if (m->proc_self_mountinfo) {
1559 fclose(m->proc_self_mountinfo);
1560 m->proc_self_mountinfo = NULL;
1564 static int mount_enumerate(Manager *m) {
1566 struct epoll_event ev;
1569 if (!m->proc_self_mountinfo) {
1570 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1573 m->mount_watch.type = WATCH_MOUNT;
1574 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1577 ev.events = EPOLLPRI;
1578 ev.data.ptr = &m->mount_watch;
1580 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1584 if ((r = mount_load_etc_fstab(m)) < 0)
1587 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1597 void mount_fd_event(Manager *m, int events) {
1602 assert(events & EPOLLPRI);
1604 /* The manager calls this for every fd event happening on the
1605 * /proc/self/mountinfo file, which informs us about mounting
1608 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1609 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1611 /* Reset flags, just in case, for later calls */
1612 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1613 Mount *mount = (Mount*) meta;
1615 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1621 manager_dispatch_load_queue(m);
1623 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1624 Mount *mount = (Mount*) meta;
1626 if (!mount->is_mounted) {
1627 /* This has just been unmounted. */
1629 mount->from_proc_self_mountinfo = false;
1631 switch (mount->state) {
1634 mount_enter_dead(mount, true);
1638 mount_set_state(mount, mount->state);
1643 } else if (mount->just_mounted || mount->just_changed) {
1645 /* New or changed mount entry */
1647 switch (mount->state) {
1651 mount_enter_mounted(mount, true);
1654 case MOUNT_MOUNTING:
1655 mount_enter_mounting_done(mount);
1659 /* Nothing really changed, but let's
1660 * issue an notification call
1661 * nonetheless, in case somebody is
1662 * waiting for this. (e.g. file system
1663 * ro/rw remounts.) */
1664 mount_set_state(mount, mount->state);
1669 /* Reset the flags for later calls */
1670 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1674 static void mount_reset_failed(Unit *u) {
1675 Mount *m = MOUNT(u);
1679 if (m->state == MOUNT_FAILED)
1680 mount_set_state(m, MOUNT_DEAD);
1685 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1686 Mount *m = MOUNT(u);
1688 Set *pid_set = NULL;
1692 if (who == KILL_MAIN) {
1693 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1697 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1698 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1702 if (m->control_pid > 0)
1703 if (kill(m->control_pid, signo) < 0)
1706 if (mode == KILL_CONTROL_GROUP) {
1709 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1712 /* Exclude the control pid from being killed via the cgroup */
1713 if (m->control_pid > 0)
1714 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1719 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1720 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1731 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1732 [MOUNT_DEAD] = "dead",
1733 [MOUNT_MOUNTING] = "mounting",
1734 [MOUNT_MOUNTING_DONE] = "mounting-done",
1735 [MOUNT_MOUNTED] = "mounted",
1736 [MOUNT_REMOUNTING] = "remounting",
1737 [MOUNT_UNMOUNTING] = "unmounting",
1738 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1739 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1740 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1741 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1742 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1743 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1744 [MOUNT_FAILED] = "failed"
1747 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1749 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1750 [MOUNT_EXEC_MOUNT] = "ExecMount",
1751 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1752 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1755 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1757 const UnitVTable mount_vtable = {
1761 .no_instances = true,
1763 .show_status = true,
1769 .coldplug = mount_coldplug,
1773 .start = mount_start,
1775 .reload = mount_reload,
1779 .serialize = mount_serialize,
1780 .deserialize_item = mount_deserialize_item,
1782 .active_state = mount_active_state,
1783 .sub_state_to_string = mount_sub_state_to_string,
1785 .check_gc = mount_check_gc,
1787 .sigchld_event = mount_sigchld_event,
1788 .timer_event = mount_timer_event,
1790 .reset_failed = mount_reset_failed,
1792 .bus_interface = "org.freedesktop.systemd1.Mount",
1793 .bus_message_handler = bus_mount_message_handler,
1794 .bus_invalidating_properties = bus_mount_invalidating_properties,
1796 .enumerate = mount_enumerate,
1797 .shutdown = mount_shutdown