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 int mount_add_mount_links(Mount *m) {
138 if (m->from_fragment)
139 pm = &m->parameters_fragment;
140 else if (m->from_etc_fstab)
141 pm = &m->parameters_etc_fstab;
145 /* Adds in links to other mount points that might lie below or
146 * above us in the hierarchy */
148 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
149 Mount *n = (Mount*) other;
155 if (n->meta.load_state != UNIT_LOADED)
158 if (n->from_fragment)
159 pn = &n->parameters_fragment;
160 else if (n->from_etc_fstab)
161 pn = &n->parameters_etc_fstab;
165 if (path_startswith(m->where, n->where)) {
167 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
170 if (n->from_etc_fstab || n->from_fragment)
171 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
174 } else if (path_startswith(n->where, m->where)) {
176 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
179 if (m->from_etc_fstab || m->from_fragment)
180 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
183 } else if (pm && path_startswith(pm->what, n->where)) {
185 if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
188 if (m->from_etc_fstab || m->from_fragment)
189 if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
192 } else if (pn && path_startswith(pn->what, m->where)) {
194 if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
197 if (n->from_etc_fstab || n->from_fragment)
198 if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
206 static int mount_add_swap_links(Mount *m) {
212 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
213 if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
219 static int mount_add_path_links(Mount *m) {
225 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH])
226 if ((r = path_add_one_mount_link((Path*) other, m)) < 0)
232 static int mount_add_automount_links(Mount *m) {
238 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
239 if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
245 static int mount_add_socket_links(Mount *m) {
251 LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
252 if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
258 static char* mount_test_option(const char *haystack, const char *needle) {
263 /* Like glibc's hasmntopt(), but works on a string, not a
270 me.mnt_opts = (char*) haystack;
272 return hasmntopt(&me, needle);
275 static int mount_add_target_links(Mount *m) {
276 const char *target, *after = NULL;
280 bool noauto, nofail, handle, automount;
284 if (m->from_fragment)
285 p = &m->parameters_fragment;
286 else if (m->from_etc_fstab)
287 p = &m->parameters_etc_fstab;
291 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
292 nofail = !!mount_test_option(p->options, "nofail");
294 mount_test_option(p->options, "comment=systemd.mount") ||
295 mount_test_option(p->options, "x-systemd-mount") ||
296 m->meta.manager->mount_auto;
298 mount_test_option(p->options, "comment=systemd.automount") ||
299 mount_test_option(p->options, "x-systemd-automount");
301 if (mount_test_option(p->options, "_netdev") ||
302 (p->fstype && fstype_is_network(p->fstype))) {
303 target = SPECIAL_REMOTE_FS_TARGET;
305 if (m->meta.manager->running_as == MANAGER_SYSTEM)
306 after = SPECIAL_NETWORK_TARGET;
308 target = SPECIAL_LOCAL_FS_TARGET;
310 if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0)
314 if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true)) < 0)
317 if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) {
320 if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
323 return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true);
326 /* Automatically add mount points that aren't natively
327 * configured to local-fs.target */
332 m->meta.manager->running_as == MANAGER_SYSTEM)
333 if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
336 return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
340 static bool mount_is_bind(MountParameters *p) {
343 if (p->fstype && streq(p->fstype, "bind"))
346 if (mount_test_option(p->options, "bind"))
352 static int mount_add_device_links(Mount *m) {
358 if (m->from_fragment)
359 p = &m->parameters_fragment;
360 else if (m->from_etc_fstab)
361 p = &m->parameters_etc_fstab;
368 if (!mount_is_bind(p) && !path_equal(m->where, "/")) {
371 noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
372 nofail = !!mount_test_option(p->options, "nofail");
374 if ((r = unit_add_node_link(UNIT(m), p->what,
376 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM)) < 0)
382 UNIT(m)->meta.manager->running_as == MANAGER_SYSTEM &&
383 !path_equal(m->where, "/")) {
386 /* Let's add in the fsck service */
388 /* aka SPECIAL_FSCK_SERVICE */
389 if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
392 if ((r = manager_load_unit_prepare(m->meta.manager, name, NULL, NULL, &fsck)) < 0) {
393 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
400 SERVICE(fsck)->fsck_passno = p->passno;
402 if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
409 static int mount_add_default_dependencies(Mount *m) {
414 if (m->meta.manager->running_as == MANAGER_SYSTEM &&
415 !path_equal(m->where, "/")) {
418 if (m->from_fragment)
419 p = &m->parameters_fragment;
420 else if (m->from_etc_fstab)
421 p = &m->parameters_etc_fstab;
426 (!mount_test_option(p->options, "_netdev") &&
427 !(p->fstype && fstype_is_network(p->fstype)) &&
428 (mount_test_option(p->options, "usrquota") || mount_test_option(p->options, "grpquota"))))
429 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
430 (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
433 if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
440 static int mount_verify(Mount *m) {
445 if (m->meta.load_state != UNIT_LOADED)
448 if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
451 if (!(e = unit_name_from_path(m->where, ".mount")))
454 b = unit_has_name(UNIT(m), e);
458 log_error("%s's Where setting doesn't match unit name. Refusing.", m->meta.id);
462 if (m->meta.fragment_path && !m->parameters_fragment.what) {
463 log_error("%s's What setting is missing. Refusing.", m->meta.id);
467 if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
468 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id);
475 static int mount_load(Unit *u) {
480 assert(u->meta.load_state == UNIT_STUB);
482 if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
485 /* This is a new unit? Then let's add in some extras */
486 if (u->meta.load_state == UNIT_LOADED) {
487 if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
490 if (m->meta.fragment_path)
491 m->from_fragment = true;
494 if (!(m->where = unit_name_to_path(u->meta.id)))
497 path_kill_slashes(m->where);
499 if (!m->meta.description)
500 if ((r = unit_set_description(u, m->where)) < 0)
503 if ((r = mount_add_device_links(m)) < 0)
506 if ((r = mount_add_mount_links(m)) < 0)
509 if ((r = mount_add_socket_links(m)) < 0)
512 if ((r = mount_add_swap_links(m)) < 0)
515 if ((r = mount_add_path_links(m)) < 0)
518 if ((r = mount_add_automount_links(m)) < 0)
521 if ((r = mount_add_target_links(m)) < 0)
524 if ((r = unit_add_default_cgroups(u)) < 0)
527 if (m->meta.default_dependencies)
528 if ((r = mount_add_default_dependencies(m)) < 0)
532 return mount_verify(m);
535 static int mount_notify_automount(Mount *m, int status) {
541 if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
542 return r == -ENOENT ? 0 : r;
544 return automount_send_ready(AUTOMOUNT(p), status);
547 static void mount_set_state(Mount *m, MountState state) {
548 MountState old_state;
551 old_state = m->state;
554 if (state != MOUNT_MOUNTING &&
555 state != MOUNT_MOUNTING_DONE &&
556 state != MOUNT_REMOUNTING &&
557 state != MOUNT_UNMOUNTING &&
558 state != MOUNT_MOUNTING_SIGTERM &&
559 state != MOUNT_MOUNTING_SIGKILL &&
560 state != MOUNT_UNMOUNTING_SIGTERM &&
561 state != MOUNT_UNMOUNTING_SIGKILL &&
562 state != MOUNT_REMOUNTING_SIGTERM &&
563 state != MOUNT_REMOUNTING_SIGKILL) {
564 unit_unwatch_timer(UNIT(m), &m->timer_watch);
565 mount_unwatch_control_pid(m);
566 m->control_command = NULL;
567 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
570 if (state == MOUNT_MOUNTED ||
571 state == MOUNT_REMOUNTING)
572 mount_notify_automount(m, 0);
573 else if (state == MOUNT_DEAD ||
574 state == MOUNT_UNMOUNTING ||
575 state == MOUNT_MOUNTING_SIGTERM ||
576 state == MOUNT_MOUNTING_SIGKILL ||
577 state == MOUNT_REMOUNTING_SIGTERM ||
578 state == MOUNT_REMOUNTING_SIGKILL ||
579 state == MOUNT_UNMOUNTING_SIGTERM ||
580 state == MOUNT_UNMOUNTING_SIGKILL ||
581 state == MOUNT_FAILED)
582 mount_notify_automount(m, -ENODEV);
584 if (state != old_state)
585 log_debug("%s changed %s -> %s",
587 mount_state_to_string(old_state),
588 mount_state_to_string(state));
590 unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state], !m->reload_failure);
591 m->reload_failure = false;
594 static int mount_coldplug(Unit *u) {
596 MountState new_state = MOUNT_DEAD;
600 assert(m->state == MOUNT_DEAD);
602 if (m->deserialized_state != m->state)
603 new_state = m->deserialized_state;
604 else if (m->from_proc_self_mountinfo)
605 new_state = MOUNT_MOUNTED;
607 if (new_state != m->state) {
609 if (new_state == MOUNT_MOUNTING ||
610 new_state == MOUNT_MOUNTING_DONE ||
611 new_state == MOUNT_REMOUNTING ||
612 new_state == MOUNT_UNMOUNTING ||
613 new_state == MOUNT_MOUNTING_SIGTERM ||
614 new_state == MOUNT_MOUNTING_SIGKILL ||
615 new_state == MOUNT_UNMOUNTING_SIGTERM ||
616 new_state == MOUNT_UNMOUNTING_SIGKILL ||
617 new_state == MOUNT_REMOUNTING_SIGTERM ||
618 new_state == MOUNT_REMOUNTING_SIGKILL) {
620 if (m->control_pid <= 0)
623 if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
626 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
630 mount_set_state(m, new_state);
636 static void mount_dump(Unit *u, FILE *f, const char *prefix) {
643 if (m->from_proc_self_mountinfo)
644 p = &m->parameters_proc_self_mountinfo;
645 else if (m->from_fragment)
646 p = &m->parameters_fragment;
648 p = &m->parameters_etc_fstab;
651 "%sMount State: %s\n"
654 "%sFile System Type: %s\n"
656 "%sFrom /etc/fstab: %s\n"
657 "%sFrom /proc/self/mountinfo: %s\n"
658 "%sFrom fragment: %s\n"
659 "%sDirectoryMode: %04o\n",
660 prefix, mount_state_to_string(m->state),
662 prefix, strna(p->what),
663 prefix, strna(p->fstype),
664 prefix, strna(p->options),
665 prefix, yes_no(m->from_etc_fstab),
666 prefix, yes_no(m->from_proc_self_mountinfo),
667 prefix, yes_no(m->from_fragment),
668 prefix, m->directory_mode);
670 if (m->control_pid > 0)
672 "%sControl PID: %lu\n",
673 prefix, (unsigned long) m->control_pid);
675 exec_context_dump(&m->exec_context, f, prefix);
678 static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
686 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
689 if ((r = exec_spawn(c,
693 m->meta.manager->environment,
697 m->meta.manager->confirm_spawn,
698 m->meta.cgroup_bondings,
702 if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
703 /* FIXME: we need to do something here */
711 unit_unwatch_timer(UNIT(m), &m->timer_watch);
716 static void mount_enter_dead(Mount *m, bool success) {
722 mount_set_state(m, m->failure ? MOUNT_FAILED : MOUNT_DEAD);
725 static void mount_enter_mounted(Mount *m, bool success) {
731 mount_set_state(m, MOUNT_MOUNTED);
734 static void mount_enter_signal(Mount *m, MountState state, bool success) {
737 bool wait_for_exit = false;
744 if (m->exec_context.kill_mode != KILL_NONE) {
745 int sig = (state == MOUNT_MOUNTING_SIGTERM ||
746 state == MOUNT_UNMOUNTING_SIGTERM ||
747 state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
749 if (m->control_pid > 0) {
750 if (kill_and_sigcont(m->exec_context.kill_mode == KILL_PROCESS_GROUP ?
752 m->control_pid, sig) < 0 && errno != ESRCH)
754 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
756 wait_for_exit = true;
759 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
761 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
766 /* Exclude the control pid from being killed via the cgroup */
767 if (m->control_pid > 0)
768 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
771 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
772 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
773 log_warning("Failed to kill control group: %s", strerror(-r));
775 wait_for_exit = true;
782 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
785 mount_set_state(m, state);
786 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
787 mount_enter_mounted(m, true);
789 mount_enter_dead(m, true);
794 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
796 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
797 mount_enter_mounted(m, false);
799 mount_enter_dead(m, false);
805 static void mount_enter_unmounting(Mount *m, bool success) {
813 m->control_command_id = MOUNT_EXEC_UNMOUNT;
814 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
816 if ((r = exec_command_set(
823 mount_unwatch_control_pid(m);
825 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
828 mount_set_state(m, MOUNT_UNMOUNTING);
833 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
834 mount_enter_mounted(m, false);
837 static void mount_enter_mounting(Mount *m) {
842 m->control_command_id = MOUNT_EXEC_MOUNT;
843 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
845 mkdir_p(m->where, m->directory_mode);
847 /* create the source directory for bind-mounts if needed */
848 if (m->parameters_fragment.fstype && strcmp(m->parameters_fragment.fstype, "bind") == 0)
849 mkdir_p(m->parameters_fragment.what, m->directory_mode);
851 if (m->from_fragment)
852 r = exec_command_set(
855 m->parameters_fragment.what,
857 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
858 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
860 else if (m->from_etc_fstab)
861 r = exec_command_set(
872 mount_unwatch_control_pid(m);
874 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
877 mount_set_state(m, MOUNT_MOUNTING);
882 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
883 mount_enter_dead(m, false);
886 static void mount_enter_mounting_done(Mount *m) {
889 mount_set_state(m, MOUNT_MOUNTING_DONE);
892 static void mount_enter_remounting(Mount *m, bool success) {
900 m->control_command_id = MOUNT_EXEC_REMOUNT;
901 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
903 if (m->from_fragment) {
907 if (m->parameters_fragment.options) {
908 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
917 r = exec_command_set(
920 m->parameters_fragment.what,
922 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
927 } else if (m->from_etc_fstab)
928 r = exec_command_set(
940 mount_unwatch_control_pid(m);
942 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
945 mount_set_state(m, MOUNT_REMOUNTING);
950 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
951 m->reload_failure = true;
952 mount_enter_mounted(m, true);
955 static int mount_start(Unit *u) {
960 /* We cannot fulfill this request right now, try again later
962 if (m->state == MOUNT_UNMOUNTING ||
963 m->state == MOUNT_UNMOUNTING_SIGTERM ||
964 m->state == MOUNT_UNMOUNTING_SIGKILL ||
965 m->state == MOUNT_MOUNTING_SIGTERM ||
966 m->state == MOUNT_MOUNTING_SIGKILL)
970 if (m->state == MOUNT_MOUNTING)
973 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
976 mount_enter_mounting(m);
980 static int mount_stop(Unit *u) {
986 if (m->state == MOUNT_UNMOUNTING ||
987 m->state == MOUNT_UNMOUNTING_SIGKILL ||
988 m->state == MOUNT_UNMOUNTING_SIGTERM ||
989 m->state == MOUNT_MOUNTING_SIGTERM ||
990 m->state == MOUNT_MOUNTING_SIGKILL)
993 assert(m->state == MOUNT_MOUNTING ||
994 m->state == MOUNT_MOUNTING_DONE ||
995 m->state == MOUNT_MOUNTED ||
996 m->state == MOUNT_REMOUNTING ||
997 m->state == MOUNT_REMOUNTING_SIGTERM ||
998 m->state == MOUNT_REMOUNTING_SIGKILL);
1000 mount_enter_unmounting(m, true);
1004 static int mount_reload(Unit *u) {
1005 Mount *m = MOUNT(u);
1009 if (m->state == MOUNT_MOUNTING_DONE)
1012 assert(m->state == MOUNT_MOUNTED);
1014 mount_enter_remounting(m, true);
1018 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1019 Mount *m = MOUNT(u);
1025 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1026 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1028 if (m->control_pid > 0)
1029 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1031 if (m->control_command_id >= 0)
1032 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1037 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1038 Mount *m = MOUNT(u);
1045 if (streq(key, "state")) {
1048 if ((state = mount_state_from_string(value)) < 0)
1049 log_debug("Failed to parse state value %s", value);
1051 m->deserialized_state = state;
1052 } else if (streq(key, "failure")) {
1055 if ((b = parse_boolean(value)) < 0)
1056 log_debug("Failed to parse failure value %s", value);
1058 m->failure = b || m->failure;
1060 } else if (streq(key, "control-pid")) {
1063 if (parse_pid(value, &pid) < 0)
1064 log_debug("Failed to parse control-pid value %s", value);
1066 m->control_pid = pid;
1067 } else if (streq(key, "control-command")) {
1068 MountExecCommand id;
1070 if ((id = mount_exec_command_from_string(value)) < 0)
1071 log_debug("Failed to parse exec-command value %s", value);
1073 m->control_command_id = id;
1074 m->control_command = m->exec_command + id;
1078 log_debug("Unknown serialization key '%s'", key);
1083 static UnitActiveState mount_active_state(Unit *u) {
1086 return state_translation_table[MOUNT(u)->state];
1089 static const char *mount_sub_state_to_string(Unit *u) {
1092 return mount_state_to_string(MOUNT(u)->state);
1095 static bool mount_check_gc(Unit *u) {
1096 Mount *m = MOUNT(u);
1100 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1103 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1104 Mount *m = MOUNT(u);
1110 if (pid != m->control_pid)
1115 success = is_clean_exit(code, status);
1116 m->failure = m->failure || !success;
1118 if (m->control_command) {
1119 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1120 m->control_command = NULL;
1121 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1124 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1125 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1127 /* Note that mount(8) returning and the kernel sending us a
1128 * mount table change event might happen out-of-order. If an
1129 * operation succeed we assume the kernel will follow soon too
1130 * and already change into the resulting state. If it fails
1131 * we check if the kernel still knows about the mount. and
1132 * change state accordingly. */
1136 case MOUNT_MOUNTING:
1137 case MOUNT_MOUNTING_DONE:
1138 case MOUNT_MOUNTING_SIGKILL:
1139 case MOUNT_MOUNTING_SIGTERM:
1142 mount_enter_mounted(m, true);
1143 else if (m->from_proc_self_mountinfo)
1144 mount_enter_mounted(m, false);
1146 mount_enter_dead(m, false);
1149 case MOUNT_REMOUNTING:
1150 case MOUNT_REMOUNTING_SIGKILL:
1151 case MOUNT_REMOUNTING_SIGTERM:
1153 m->reload_failure = !success;
1154 if (m->from_proc_self_mountinfo)
1155 mount_enter_mounted(m, true);
1157 mount_enter_dead(m, true);
1161 case MOUNT_UNMOUNTING:
1162 case MOUNT_UNMOUNTING_SIGKILL:
1163 case MOUNT_UNMOUNTING_SIGTERM:
1166 mount_enter_dead(m, true);
1167 else if (m->from_proc_self_mountinfo)
1168 mount_enter_mounted(m, false);
1170 mount_enter_dead(m, false);
1174 assert_not_reached("Uh, control process died at wrong time.");
1177 /* Notify clients about changed exit status */
1178 unit_add_to_dbus_queue(u);
1181 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1182 Mount *m = MOUNT(u);
1185 assert(elapsed == 1);
1186 assert(w == &m->timer_watch);
1190 case MOUNT_MOUNTING:
1191 case MOUNT_MOUNTING_DONE:
1192 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1193 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1196 case MOUNT_REMOUNTING:
1197 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1198 m->reload_failure = true;
1199 mount_enter_mounted(m, true);
1202 case MOUNT_UNMOUNTING:
1203 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1204 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1207 case MOUNT_MOUNTING_SIGTERM:
1208 if (m->exec_context.send_sigkill) {
1209 log_warning("%s mounting timed out. Killing.", u->meta.id);
1210 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1212 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1214 if (m->from_proc_self_mountinfo)
1215 mount_enter_mounted(m, false);
1217 mount_enter_dead(m, false);
1221 case MOUNT_REMOUNTING_SIGTERM:
1222 if (m->exec_context.send_sigkill) {
1223 log_warning("%s remounting timed out. Killing.", u->meta.id);
1224 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1226 log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1228 if (m->from_proc_self_mountinfo)
1229 mount_enter_mounted(m, false);
1231 mount_enter_dead(m, false);
1235 case MOUNT_UNMOUNTING_SIGTERM:
1236 if (m->exec_context.send_sigkill) {
1237 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1238 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1240 log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1242 if (m->from_proc_self_mountinfo)
1243 mount_enter_mounted(m, false);
1245 mount_enter_dead(m, false);
1249 case MOUNT_MOUNTING_SIGKILL:
1250 case MOUNT_REMOUNTING_SIGKILL:
1251 case MOUNT_UNMOUNTING_SIGKILL:
1252 log_warning("%s mount process still around after 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 assert_not_reached("Timeout at wrong time.");
1265 static int mount_add_one(
1269 const char *options,
1272 bool from_proc_self_mountinfo,
1277 char *e, *w = NULL, *o = NULL, *f = NULL;
1286 assert(!set_flags || from_proc_self_mountinfo);
1288 /* Ignore API mount points. They should never be referenced in
1289 * dependencies ever. */
1290 if (mount_point_is_api(where))
1292 if (mount_point_ignore(where))
1295 if (streq(fstype, "autofs"))
1298 /* probably some kind of swap, ignore */
1299 if (!is_path(where))
1302 if (!(e = unit_name_from_path(where, ".mount")))
1305 if (!(u = manager_get_unit(m, e))) {
1308 if (!(u = unit_new(m))) {
1313 r = unit_add_name(u, e);
1319 if (!(MOUNT(u)->where = strdup(where))) {
1324 unit_add_to_load_queue(u);
1330 if (!(w = strdup(what)) ||
1331 !(o = strdup(options)) ||
1332 !(f = strdup(fstype))) {
1337 if (from_proc_self_mountinfo) {
1338 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1341 MOUNT(u)->is_mounted = true;
1342 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1343 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1346 MOUNT(u)->from_proc_self_mountinfo = true;
1348 p = &MOUNT(u)->parameters_etc_fstab;
1349 MOUNT(u)->from_etc_fstab = true;
1363 unit_add_to_dbus_queue(u);
1378 static int mount_find_pri(char *options) {
1382 if (!(pri = mount_test_option(options, "pri=")))
1388 r = strtoul(pri, &end, 10);
1393 if (end == pri || (*end != ',' && *end != 0))
1399 static int mount_load_etc_fstab(Manager *m) {
1407 if (!(f = setmntent("/etc/fstab", "r")))
1410 while ((me = getmntent(f))) {
1414 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1419 if (!(where = strdup(me->mnt_dir))) {
1426 path_kill_slashes(what);
1428 if (where[0] == '/')
1429 path_kill_slashes(where);
1431 if (streq(me->mnt_type, "swap")) {
1434 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1441 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1442 !!mount_test_option(me->mnt_opts, "nofail"),
1443 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1446 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1461 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1464 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1468 rewind(m->proc_self_mountinfo);
1473 device = path = options = options2 = fstype = d = p = o = NULL;
1475 if ((k = fscanf(m->proc_self_mountinfo,
1476 "%*s " /* (1) mount id */
1477 "%*s " /* (2) parent id */
1478 "%*s " /* (3) major:minor */
1479 "%*s " /* (4) root */
1480 "%ms " /* (5) mount point */
1481 "%ms" /* (6) mount options */
1482 "%*[^-]" /* (7) optional fields */
1483 "- " /* (8) separator */
1484 "%ms " /* (9) file system type */
1485 "%ms" /* (10) mount source */
1486 "%ms" /* (11) mount options 2 */
1487 "%*[^\n]", /* some rubbish at the end */
1497 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1501 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1506 if (!(d = cunescape(device)) ||
1507 !(p = cunescape(path))) {
1512 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1539 static void mount_shutdown(Manager *m) {
1542 if (m->proc_self_mountinfo) {
1543 fclose(m->proc_self_mountinfo);
1544 m->proc_self_mountinfo = NULL;
1548 static int mount_enumerate(Manager *m) {
1550 struct epoll_event ev;
1553 if (!m->proc_self_mountinfo) {
1554 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1557 m->mount_watch.type = WATCH_MOUNT;
1558 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1561 ev.events = EPOLLPRI;
1562 ev.data.ptr = &m->mount_watch;
1564 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1568 if ((r = mount_load_etc_fstab(m)) < 0)
1571 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1581 void mount_fd_event(Manager *m, int events) {
1586 assert(events & EPOLLPRI);
1588 /* The manager calls this for every fd event happening on the
1589 * /proc/self/mountinfo file, which informs us about mounting
1592 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1593 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1595 /* Reset flags, just in case, for later calls */
1596 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1597 Mount *mount = (Mount*) meta;
1599 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1605 manager_dispatch_load_queue(m);
1607 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1608 Mount *mount = (Mount*) meta;
1610 if (!mount->is_mounted) {
1611 /* This has just been unmounted. */
1613 mount->from_proc_self_mountinfo = false;
1615 switch (mount->state) {
1618 mount_enter_dead(mount, true);
1622 mount_set_state(mount, mount->state);
1627 } else if (mount->just_mounted || mount->just_changed) {
1629 /* New or changed mount entry */
1631 switch (mount->state) {
1635 mount_enter_mounted(mount, true);
1638 case MOUNT_MOUNTING:
1639 mount_enter_mounting_done(mount);
1643 /* Nothing really changed, but let's
1644 * issue an notification call
1645 * nonetheless, in case somebody is
1646 * waiting for this. (e.g. file system
1647 * ro/rw remounts.) */
1648 mount_set_state(mount, mount->state);
1653 /* Reset the flags for later calls */
1654 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1658 static void mount_reset_failed(Unit *u) {
1659 Mount *m = MOUNT(u);
1663 if (m->state == MOUNT_FAILED)
1664 mount_set_state(m, MOUNT_DEAD);
1669 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1670 Mount *m = MOUNT(u);
1672 Set *pid_set = NULL;
1676 if (who == KILL_MAIN) {
1677 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1681 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1682 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1686 if (m->control_pid > 0)
1687 if (kill(mode == KILL_PROCESS_GROUP ? -m->control_pid : m->control_pid, signo) < 0)
1690 if (mode == KILL_CONTROL_GROUP) {
1693 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1696 /* Exclude the control pid from being killed via the cgroup */
1697 if (m->control_pid > 0)
1698 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1703 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1704 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1715 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1716 [MOUNT_DEAD] = "dead",
1717 [MOUNT_MOUNTING] = "mounting",
1718 [MOUNT_MOUNTING_DONE] = "mounting-done",
1719 [MOUNT_MOUNTED] = "mounted",
1720 [MOUNT_REMOUNTING] = "remounting",
1721 [MOUNT_UNMOUNTING] = "unmounting",
1722 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1723 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1724 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1725 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1726 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1727 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1728 [MOUNT_FAILED] = "failed"
1731 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1733 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1734 [MOUNT_EXEC_MOUNT] = "ExecMount",
1735 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1736 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1739 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1741 const UnitVTable mount_vtable = {
1745 .no_instances = true,
1747 .show_status = true,
1753 .coldplug = mount_coldplug,
1757 .start = mount_start,
1759 .reload = mount_reload,
1763 .serialize = mount_serialize,
1764 .deserialize_item = mount_deserialize_item,
1766 .active_state = mount_active_state,
1767 .sub_state_to_string = mount_sub_state_to_string,
1769 .check_gc = mount_check_gc,
1771 .sigchld_event = mount_sigchld_event,
1772 .timer_event = mount_timer_event,
1774 .reset_failed = mount_reset_failed,
1776 .bus_interface = "org.freedesktop.systemd1.Mount",
1777 .bus_message_handler = bus_mount_message_handler,
1778 .bus_invalidating_properties = bus_mount_invalidating_properties,
1780 .enumerate = mount_enumerate,
1781 .shutdown = mount_shutdown