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 (m->meta.fragment_path && !m->parameters_fragment.what) {
480 log_error("%s's What setting is missing. Refusing.", m->meta.id);
484 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
485 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
492 static int mount_load(Unit *u) {
497 assert(u->meta.load_state == UNIT_STUB);
499 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
502 /* This is a new unit? Then let's add in some extras */
503 if (u->meta.load_state == UNIT_LOADED) {
504 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
507 if (m->meta.fragment_path)
508 m->from_fragment = true;
511 if (!(m->where = unit_name_to_path(u->meta.id)))
514 path_kill_slashes(m->where);
516 if (!m->meta.description)
517 if ((r = unit_set_description(u, m->where)) < 0)
520 if ((r = mount_add_device_links(m)) < 0)
523 if ((r = mount_add_mount_links(m)) < 0)
526 if ((r = mount_add_socket_links(m)) < 0)
529 if ((r = mount_add_swap_links(m)) < 0)
532 if ((r = mount_add_path_links(m)) < 0)
535 if ((r = mount_add_automount_links(m)) < 0)
538 if ((r = mount_add_target_links(m)) < 0)
541 if ((r = unit_add_default_cgroups(u)) < 0)
544 if (m->meta.default_dependencies)
545 if ((r = mount_add_default_dependencies(m)) < 0)
549 return mount_verify(m);
552 static int mount_notify_automount(Mount *m, int status) {
558 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
559 return r == -ENOENT ? 0 : r;
561 return automount_send_ready(AUTOMOUNT(p), status);
564 static void mount_set_state(Mount *m, MountState state) {
565 MountState old_state;
568 old_state = m->state;
571 if (state != MOUNT_MOUNTING &&
572 state != MOUNT_MOUNTING_DONE &&
573 state != MOUNT_REMOUNTING &&
574 state != MOUNT_UNMOUNTING &&
575 state != MOUNT_MOUNTING_SIGTERM &&
576 state != MOUNT_MOUNTING_SIGKILL &&
577 state != MOUNT_UNMOUNTING_SIGTERM &&
578 state != MOUNT_UNMOUNTING_SIGKILL &&
579 state != MOUNT_REMOUNTING_SIGTERM &&
580 state != MOUNT_REMOUNTING_SIGKILL) {
581 unit_unwatch_timer(UNIT(m), &m->timer_watch);
582 mount_unwatch_control_pid(m);
583 m->control_command = NULL;
584 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
587 if (state == MOUNT_MOUNTED ||
588 state == MOUNT_REMOUNTING)
589 mount_notify_automount(m, 0);
590 else if (state == MOUNT_DEAD ||
591 state == MOUNT_UNMOUNTING ||
592 state == MOUNT_MOUNTING_SIGTERM ||
593 state == MOUNT_MOUNTING_SIGKILL ||
594 state == MOUNT_REMOUNTING_SIGTERM ||
595 state == MOUNT_REMOUNTING_SIGKILL ||
596 state == MOUNT_UNMOUNTING_SIGTERM ||
597 state == MOUNT_UNMOUNTING_SIGKILL ||
598 state == MOUNT_FAILED)
599 mount_notify_automount(m, -ENODEV);
601 if (state != old_state)
602 log_debug("%s changed %s -> %s",
604 mount_state_to_string(old_state),
605 mount_state_to_string(state));
607 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
608 m->reload_failure = false;
611 static int mount_coldplug(Unit *u) {
613 MountState new_state = MOUNT_DEAD;
617 assert(m->state == MOUNT_DEAD);
619 if (m->deserialized_state != m->state)
620 new_state = m->deserialized_state;
621 else if (m->from_proc_self_mountinfo)
622 new_state = MOUNT_MOUNTED;
624 if (new_state != m->state) {
626 if (new_state == MOUNT_MOUNTING ||
627 new_state == MOUNT_MOUNTING_DONE ||
628 new_state == MOUNT_REMOUNTING ||
629 new_state == MOUNT_UNMOUNTING ||
630 new_state == MOUNT_MOUNTING_SIGTERM ||
631 new_state == MOUNT_MOUNTING_SIGKILL ||
632 new_state == MOUNT_UNMOUNTING_SIGTERM ||
633 new_state == MOUNT_UNMOUNTING_SIGKILL ||
634 new_state == MOUNT_REMOUNTING_SIGTERM ||
635 new_state == MOUNT_REMOUNTING_SIGKILL) {
637 if (m->control_pid <= 0)
640 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
643 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
647 mount_set_state(m, new_state);
653 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
660 p = get_mount_parameters(m);
663 "%sMount State: %s\n"
666 "%sFile System Type: %s\n"
668 "%sFrom /etc/fstab: %s\n"
669 "%sFrom /proc/self/mountinfo: %s\n"
670 "%sFrom fragment: %s\n"
671 "%sDirectoryMode: %04o\n",
672 prefix, mount_state_to_string(m->state),
674 prefix, strna(p->what),
675 prefix, strna(p->fstype),
676 prefix, strna(p->options),
677 prefix, yes_no(m->from_etc_fstab),
678 prefix, yes_no(m->from_proc_self_mountinfo),
679 prefix, yes_no(m->from_fragment),
680 prefix, m->directory_mode);
682 if (m->control_pid > 0)
684 "%sControl PID: %lu\n",
685 prefix, (unsigned long) m->control_pid);
687 exec_context_dump(&m->exec_context, f, prefix);
690 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
698 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
701 if ((r = exec_spawn(c,
705 m->meta.manager->environment,
709 m->meta.manager->confirm_spawn,
710 m->meta.cgroup_bondings,
714 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
715 /* FIXME: we need to do something here */
723 unit_unwatch_timer(UNIT(m), &m->timer_watch);
728 static void mount_enter_dead(Mount *m, bool success) {
734 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
737 static void mount_enter_mounted(Mount *m, bool success) {
743 mount_set_state(m, MOUNT_MOUNTED);
746 static void mount_enter_signal(Mount *m, MountState state, bool success) {
749 bool wait_for_exit = false;
756 if (m->exec_context.kill_mode != KILL_NONE) {
757 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
758 state == MOUNT_UNMOUNTING_SIGTERM ||
759 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
761 if (m->control_pid > 0) {
762 if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
764 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
766 wait_for_exit = true;
769 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
771 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
776 /* Exclude the control pid from being killed via the cgroup */
777 if (m->control_pid > 0)
778 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
781 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
782 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
783 log_warning("Failed to kill control group: %s", strerror(-r));
785 wait_for_exit = true;
792 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
795 mount_set_state(m, state);
796 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
797 mount_enter_mounted(m, true);
799 mount_enter_dead(m, true);
804 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
806 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
807 mount_enter_mounted(m, false);
809 mount_enter_dead(m, false);
815 static void mount_enter_unmounting(Mount *m, bool success) {
823 m->control_command_id = MOUNT_EXEC_UNMOUNT;
824 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
826 if ((r = exec_command_set(
833 mount_unwatch_control_pid(m);
835 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
838 mount_set_state(m, MOUNT_UNMOUNTING);
843 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
844 mount_enter_mounted(m, false);
847 static void mount_enter_mounting(Mount *m) {
853 m->control_command_id = MOUNT_EXEC_MOUNT;
854 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
856 mkdir_p(m->where, m->directory_mode);
858 /* Create the source directory for bind-mounts if needed */
859 p = get_mount_parameters_configured(m);
860 if (p && mount_is_bind(p))
861 mkdir_p(p->what, m->directory_mode);
863 if (m->from_fragment)
864 r = exec_command_set(
867 m->parameters_fragment.what,
869 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
870 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
872 else if (m->from_etc_fstab)
873 r = exec_command_set(
884 mount_unwatch_control_pid(m);
886 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
889 mount_set_state(m, MOUNT_MOUNTING);
894 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
895 mount_enter_dead(m, false);
898 static void mount_enter_mounting_done(Mount *m) {
901 mount_set_state(m, MOUNT_MOUNTING_DONE);
904 static void mount_enter_remounting(Mount *m, bool success) {
912 m->control_command_id = MOUNT_EXEC_REMOUNT;
913 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
915 if (m->from_fragment) {
919 if (m->parameters_fragment.options) {
920 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
929 r = exec_command_set(
932 m->parameters_fragment.what,
934 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
939 } else if (m->from_etc_fstab)
940 r = exec_command_set(
952 mount_unwatch_control_pid(m);
954 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
957 mount_set_state(m, MOUNT_REMOUNTING);
962 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
963 m->reload_failure = true;
964 mount_enter_mounted(m, true);
967 static int mount_start(Unit *u) {
972 /* We cannot fulfill this request right now, try again later
974 if (m->state == MOUNT_UNMOUNTING ||
975 m->state == MOUNT_UNMOUNTING_SIGTERM ||
976 m->state == MOUNT_UNMOUNTING_SIGKILL ||
977 m->state == MOUNT_MOUNTING_SIGTERM ||
978 m->state == MOUNT_MOUNTING_SIGKILL)
982 if (m->state == MOUNT_MOUNTING)
985 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
988 mount_enter_mounting(m);
992 static int mount_stop(Unit *u) {
998 if (m->state == MOUNT_UNMOUNTING ||
999 m->state == MOUNT_UNMOUNTING_SIGKILL ||
1000 m->state == MOUNT_UNMOUNTING_SIGTERM ||
1001 m->state == MOUNT_MOUNTING_SIGTERM ||
1002 m->state == MOUNT_MOUNTING_SIGKILL)
1005 assert(m->state == MOUNT_MOUNTING ||
1006 m->state == MOUNT_MOUNTING_DONE ||
1007 m->state == MOUNT_MOUNTED ||
1008 m->state == MOUNT_REMOUNTING ||
1009 m->state == MOUNT_REMOUNTING_SIGTERM ||
1010 m->state == MOUNT_REMOUNTING_SIGKILL);
1012 mount_enter_unmounting(m, true);
1016 static int mount_reload(Unit *u) {
1017 Mount *m = MOUNT(u);
1021 if (m->state == MOUNT_MOUNTING_DONE)
1024 assert(m->state == MOUNT_MOUNTED);
1026 mount_enter_remounting(m, true);
1030 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1031 Mount *m = MOUNT(u);
1037 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1038 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1040 if (m->control_pid > 0)
1041 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1043 if (m->control_command_id >= 0)
1044 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1049 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1050 Mount *m = MOUNT(u);
1057 if (streq(key, "state")) {
1060 if ((state = mount_state_from_string(value)) < 0)
1061 log_debug("Failed to parse state value %s", value);
1063 m->deserialized_state = state;
1064 } else if (streq(key, "failure")) {
1067 if ((b = parse_boolean(value)) < 0)
1068 log_debug("Failed to parse failure value %s", value);
1070 m->failure = b || m->failure;
1072 } else if (streq(key, "control-pid")) {
1075 if (parse_pid(value, &pid) < 0)
1076 log_debug("Failed to parse control-pid value %s", value);
1078 m->control_pid = pid;
1079 } else if (streq(key, "control-command")) {
1080 MountExecCommand id;
1082 if ((id = mount_exec_command_from_string(value)) < 0)
1083 log_debug("Failed to parse exec-command value %s", value);
1085 m->control_command_id = id;
1086 m->control_command = m->exec_command + id;
1090 log_debug("Unknown serialization key '%s'", key);
1095 static UnitActiveState mount_active_state(Unit *u) {
1098 return state_translation_table[MOUNT(u)->state];
1101 static const char *mount_sub_state_to_string(Unit *u) {
1104 return mount_state_to_string(MOUNT(u)->state);
1107 static bool mount_check_gc(Unit *u) {
1108 Mount *m = MOUNT(u);
1112 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1115 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1116 Mount *m = MOUNT(u);
1122 if (pid != m->control_pid)
1127 success = is_clean_exit(code, status);
1128 m->failure = m->failure || !success;
1130 if (m->control_command) {
1131 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1132 m->control_command = NULL;
1133 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1136 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1137 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1139 /* Note that mount(8) returning and the kernel sending us a
1140 * mount table change event might happen out-of-order. If an
1141 * operation succeed we assume the kernel will follow soon too
1142 * and already change into the resulting state. If it fails
1143 * we check if the kernel still knows about the mount. and
1144 * change state accordingly. */
1148 case MOUNT_MOUNTING:
1149 case MOUNT_MOUNTING_DONE:
1150 case MOUNT_MOUNTING_SIGKILL:
1151 case MOUNT_MOUNTING_SIGTERM:
1154 mount_enter_mounted(m, true);
1155 else if (m->from_proc_self_mountinfo)
1156 mount_enter_mounted(m, false);
1158 mount_enter_dead(m, false);
1161 case MOUNT_REMOUNTING:
1162 case MOUNT_REMOUNTING_SIGKILL:
1163 case MOUNT_REMOUNTING_SIGTERM:
1165 m->reload_failure = !success;
1166 if (m->from_proc_self_mountinfo)
1167 mount_enter_mounted(m, true);
1169 mount_enter_dead(m, true);
1173 case MOUNT_UNMOUNTING:
1174 case MOUNT_UNMOUNTING_SIGKILL:
1175 case MOUNT_UNMOUNTING_SIGTERM:
1178 mount_enter_dead(m, true);
1179 else if (m->from_proc_self_mountinfo)
1180 mount_enter_mounted(m, false);
1182 mount_enter_dead(m, false);
1186 assert_not_reached("Uh, control process died at wrong time.");
1189 /* Notify clients about changed exit status */
1190 unit_add_to_dbus_queue(u);
1193 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1194 Mount *m = MOUNT(u);
1197 assert(elapsed == 1);
1198 assert(w == &m->timer_watch);
1202 case MOUNT_MOUNTING:
1203 case MOUNT_MOUNTING_DONE:
1204 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1205 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1208 case MOUNT_REMOUNTING:
1209 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1210 m->reload_failure = true;
1211 mount_enter_mounted(m, true);
1214 case MOUNT_UNMOUNTING:
1215 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1216 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1219 case MOUNT_MOUNTING_SIGTERM:
1220 if (m->exec_context.send_sigkill) {
1221 log_warning("%s mounting timed out. Killing.", u->meta.id);
1222 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1224 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1226 if (m->from_proc_self_mountinfo)
1227 mount_enter_mounted(m, false);
1229 mount_enter_dead(m, false);
1233 case MOUNT_REMOUNTING_SIGTERM:
1234 if (m->exec_context.send_sigkill) {
1235 log_warning("%s remounting timed out. Killing.", u->meta.id);
1236 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1238 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1240 if (m->from_proc_self_mountinfo)
1241 mount_enter_mounted(m, false);
1243 mount_enter_dead(m, false);
1247 case MOUNT_UNMOUNTING_SIGTERM:
1248 if (m->exec_context.send_sigkill) {
1249 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1250 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1252 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1254 if (m->from_proc_self_mountinfo)
1255 mount_enter_mounted(m, false);
1257 mount_enter_dead(m, false);
1261 case MOUNT_MOUNTING_SIGKILL:
1262 case MOUNT_REMOUNTING_SIGKILL:
1263 case MOUNT_UNMOUNTING_SIGKILL:
1264 log_warning("%s mount process still around after 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 assert_not_reached("Timeout at wrong time.");
1277 static int mount_add_one(
1281 const char *options,
1284 bool from_proc_self_mountinfo,
1289 char *e, *w = NULL, *o = NULL, *f = NULL;
1298 assert(!set_flags || from_proc_self_mountinfo);
1300 /* Ignore API mount points. They should never be referenced in
1301 * dependencies ever. */
1302 if (mount_point_is_api(where))
1304 if (mount_point_ignore(where))
1307 if (streq(fstype, "autofs"))
1310 /* probably some kind of swap, ignore */
1311 if (!is_path(where))
1314 if (!(e = unit_name_from_path(where, ".mount")))
1317 if (!(u = manager_get_unit(m, e))) {
1320 if (!(u = unit_new(m))) {
1325 r = unit_add_name(u, e);
1331 if (!(MOUNT(u)->where = strdup(where))) {
1336 unit_add_to_load_queue(u);
1342 if (!(w = strdup(what)) ||
1343 !(o = strdup(options)) ||
1344 !(f = strdup(fstype))) {
1349 if (from_proc_self_mountinfo) {
1350 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1353 MOUNT(u)->is_mounted = true;
1354 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1355 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1358 MOUNT(u)->from_proc_self_mountinfo = true;
1360 p = &MOUNT(u)->parameters_etc_fstab;
1361 MOUNT(u)->from_etc_fstab = true;
1375 unit_add_to_dbus_queue(u);
1390 static int mount_find_pri(char *options) {
1394 if (!(pri = mount_test_option(options, "pri=")))
1400 r = strtoul(pri, &end, 10);
1405 if (end == pri || (*end != ',' && *end != 0))
1411 static int mount_load_etc_fstab(Manager *m) {
1419 if (!(f = setmntent("/etc/fstab", "r")))
1422 while ((me = getmntent(f))) {
1426 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1431 if (!(where = strdup(me->mnt_dir))) {
1438 path_kill_slashes(what);
1440 if (where[0] == '/')
1441 path_kill_slashes(where);
1443 if (streq(me->mnt_type, "swap")) {
1446 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1453 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1454 !!mount_test_option(me->mnt_opts, "nofail"),
1455 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1458 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1473 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1476 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1480 rewind(m->proc_self_mountinfo);
1485 device = path = options = options2 = fstype = d = p = o = NULL;
1487 if ((k = fscanf(m->proc_self_mountinfo,
1488 "%*s " /* (1) mount id */
1489 "%*s " /* (2) parent id */
1490 "%*s " /* (3) major:minor */
1491 "%*s " /* (4) root */
1492 "%ms " /* (5) mount point */
1493 "%ms" /* (6) mount options */
1494 "%*[^-]" /* (7) optional fields */
1495 "- " /* (8) separator */
1496 "%ms " /* (9) file system type */
1497 "%ms" /* (10) mount source */
1498 "%ms" /* (11) mount options 2 */
1499 "%*[^\n]", /* some rubbish at the end */
1509 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1513 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1518 if (!(d = cunescape(device)) ||
1519 !(p = cunescape(path))) {
1524 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1551 static void mount_shutdown(Manager *m) {
1554 if (m->proc_self_mountinfo) {
1555 fclose(m->proc_self_mountinfo);
1556 m->proc_self_mountinfo = NULL;
1560 static int mount_enumerate(Manager *m) {
1562 struct epoll_event ev;
1565 if (!m->proc_self_mountinfo) {
1566 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1569 m->mount_watch.type = WATCH_MOUNT;
1570 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1573 ev.events = EPOLLPRI;
1574 ev.data.ptr = &m->mount_watch;
1576 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1580 if ((r = mount_load_etc_fstab(m)) < 0)
1583 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1593 void mount_fd_event(Manager *m, int events) {
1598 assert(events & EPOLLPRI);
1600 /* The manager calls this for every fd event happening on the
1601 * /proc/self/mountinfo file, which informs us about mounting
1604 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1605 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1607 /* Reset flags, just in case, for later calls */
1608 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1609 Mount *mount = (Mount*) meta;
1611 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1617 manager_dispatch_load_queue(m);
1619 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1620 Mount *mount = (Mount*) meta;
1622 if (!mount->is_mounted) {
1623 /* This has just been unmounted. */
1625 mount->from_proc_self_mountinfo = false;
1627 switch (mount->state) {
1630 mount_enter_dead(mount, true);
1634 mount_set_state(mount, mount->state);
1639 } else if (mount->just_mounted || mount->just_changed) {
1641 /* New or changed mount entry */
1643 switch (mount->state) {
1647 mount_enter_mounted(mount, true);
1650 case MOUNT_MOUNTING:
1651 mount_enter_mounting_done(mount);
1655 /* Nothing really changed, but let's
1656 * issue an notification call
1657 * nonetheless, in case somebody is
1658 * waiting for this. (e.g. file system
1659 * ro/rw remounts.) */
1660 mount_set_state(mount, mount->state);
1665 /* Reset the flags for later calls */
1666 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1670 static void mount_reset_failed(Unit *u) {
1671 Mount *m = MOUNT(u);
1675 if (m->state == MOUNT_FAILED)
1676 mount_set_state(m, MOUNT_DEAD);
1681 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1682 Mount *m = MOUNT(u);
1684 Set *pid_set = NULL;
1688 if (who == KILL_MAIN) {
1689 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1693 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1694 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1698 if (m->control_pid > 0)
1699 if (kill(m->control_pid, signo) < 0)
1702 if (mode == KILL_CONTROL_GROUP) {
1705 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1708 /* Exclude the control pid from being killed via the cgroup */
1709 if (m->control_pid > 0)
1710 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1715 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1716 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1727 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1728 [MOUNT_DEAD] = "dead",
1729 [MOUNT_MOUNTING] = "mounting",
1730 [MOUNT_MOUNTING_DONE] = "mounting-done",
1731 [MOUNT_MOUNTED] = "mounted",
1732 [MOUNT_REMOUNTING] = "remounting",
1733 [MOUNT_UNMOUNTING] = "unmounting",
1734 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1735 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1736 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1737 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1738 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1739 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1740 [MOUNT_FAILED] = "failed"
1743 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1745 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1746 [MOUNT_EXEC_MOUNT] = "ExecMount",
1747 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1748 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1751 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1753 const UnitVTable mount_vtable = {
1757 .no_instances = true,
1759 .show_status = true,
1765 .coldplug = mount_coldplug,
1769 .start = mount_start,
1771 .reload = mount_reload,
1775 .serialize = mount_serialize,
1776 .deserialize_item = mount_deserialize_item,
1778 .active_state = mount_active_state,
1779 .sub_state_to_string = mount_sub_state_to_string,
1781 .check_gc = mount_check_gc,
1783 .sigchld_event = mount_sigchld_event,
1784 .timer_event = mount_timer_event,
1786 .reset_failed = mount_reset_failed,
1788 .bus_interface = "org.freedesktop.systemd1.Mount",
1789 .bus_message_handler = bus_mount_message_handler,
1790 .bus_invalidating_properties = bus_mount_invalidating_properties,
1792 .enumerate = mount_enumerate,
1793 .shutdown = mount_shutdown