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->control_pid, sig) < 0 && errno != ESRCH)
752 log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
754 wait_for_exit = true;
757 if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
759 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
764 /* Exclude the control pid from being killed via the cgroup */
765 if (m->control_pid > 0)
766 if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
769 if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
770 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
771 log_warning("Failed to kill control group: %s", strerror(-r));
773 wait_for_exit = true;
780 if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
783 mount_set_state(m, state);
784 } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
785 mount_enter_mounted(m, true);
787 mount_enter_dead(m, true);
792 log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r));
794 if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
795 mount_enter_mounted(m, false);
797 mount_enter_dead(m, false);
803 static void mount_enter_unmounting(Mount *m, bool success) {
811 m->control_command_id = MOUNT_EXEC_UNMOUNT;
812 m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
814 if ((r = exec_command_set(
821 mount_unwatch_control_pid(m);
823 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
826 mount_set_state(m, MOUNT_UNMOUNTING);
831 log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r));
832 mount_enter_mounted(m, false);
835 static void mount_enter_mounting(Mount *m) {
840 m->control_command_id = MOUNT_EXEC_MOUNT;
841 m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
843 mkdir_p(m->where, m->directory_mode);
845 /* create the source directory for bind-mounts if needed */
846 if (m->parameters_fragment.fstype && strcmp(m->parameters_fragment.fstype, "bind") == 0)
847 mkdir_p(m->parameters_fragment.what, m->directory_mode);
849 if (m->from_fragment)
850 r = exec_command_set(
853 m->parameters_fragment.what,
855 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
856 m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
858 else if (m->from_etc_fstab)
859 r = exec_command_set(
870 mount_unwatch_control_pid(m);
872 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
875 mount_set_state(m, MOUNT_MOUNTING);
880 log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r));
881 mount_enter_dead(m, false);
884 static void mount_enter_mounting_done(Mount *m) {
887 mount_set_state(m, MOUNT_MOUNTING_DONE);
890 static void mount_enter_remounting(Mount *m, bool success) {
898 m->control_command_id = MOUNT_EXEC_REMOUNT;
899 m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
901 if (m->from_fragment) {
905 if (m->parameters_fragment.options) {
906 if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
915 r = exec_command_set(
918 m->parameters_fragment.what,
920 "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto",
925 } else if (m->from_etc_fstab)
926 r = exec_command_set(
938 mount_unwatch_control_pid(m);
940 if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
943 mount_set_state(m, MOUNT_REMOUNTING);
948 log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r));
949 m->reload_failure = true;
950 mount_enter_mounted(m, true);
953 static int mount_start(Unit *u) {
958 /* We cannot fulfill this request right now, try again later
960 if (m->state == MOUNT_UNMOUNTING ||
961 m->state == MOUNT_UNMOUNTING_SIGTERM ||
962 m->state == MOUNT_UNMOUNTING_SIGKILL ||
963 m->state == MOUNT_MOUNTING_SIGTERM ||
964 m->state == MOUNT_MOUNTING_SIGKILL)
968 if (m->state == MOUNT_MOUNTING)
971 assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
974 mount_enter_mounting(m);
978 static int mount_stop(Unit *u) {
984 if (m->state == MOUNT_UNMOUNTING ||
985 m->state == MOUNT_UNMOUNTING_SIGKILL ||
986 m->state == MOUNT_UNMOUNTING_SIGTERM ||
987 m->state == MOUNT_MOUNTING_SIGTERM ||
988 m->state == MOUNT_MOUNTING_SIGKILL)
991 assert(m->state == MOUNT_MOUNTING ||
992 m->state == MOUNT_MOUNTING_DONE ||
993 m->state == MOUNT_MOUNTED ||
994 m->state == MOUNT_REMOUNTING ||
995 m->state == MOUNT_REMOUNTING_SIGTERM ||
996 m->state == MOUNT_REMOUNTING_SIGKILL);
998 mount_enter_unmounting(m, true);
1002 static int mount_reload(Unit *u) {
1003 Mount *m = MOUNT(u);
1007 if (m->state == MOUNT_MOUNTING_DONE)
1010 assert(m->state == MOUNT_MOUNTED);
1012 mount_enter_remounting(m, true);
1016 static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
1017 Mount *m = MOUNT(u);
1023 unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
1024 unit_serialize_item(u, f, "failure", yes_no(m->failure));
1026 if (m->control_pid > 0)
1027 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid);
1029 if (m->control_command_id >= 0)
1030 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
1035 static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1036 Mount *m = MOUNT(u);
1043 if (streq(key, "state")) {
1046 if ((state = mount_state_from_string(value)) < 0)
1047 log_debug("Failed to parse state value %s", value);
1049 m->deserialized_state = state;
1050 } else if (streq(key, "failure")) {
1053 if ((b = parse_boolean(value)) < 0)
1054 log_debug("Failed to parse failure value %s", value);
1056 m->failure = b || m->failure;
1058 } else if (streq(key, "control-pid")) {
1061 if (parse_pid(value, &pid) < 0)
1062 log_debug("Failed to parse control-pid value %s", value);
1064 m->control_pid = pid;
1065 } else if (streq(key, "control-command")) {
1066 MountExecCommand id;
1068 if ((id = mount_exec_command_from_string(value)) < 0)
1069 log_debug("Failed to parse exec-command value %s", value);
1071 m->control_command_id = id;
1072 m->control_command = m->exec_command + id;
1076 log_debug("Unknown serialization key '%s'", key);
1081 static UnitActiveState mount_active_state(Unit *u) {
1084 return state_translation_table[MOUNT(u)->state];
1087 static const char *mount_sub_state_to_string(Unit *u) {
1090 return mount_state_to_string(MOUNT(u)->state);
1093 static bool mount_check_gc(Unit *u) {
1094 Mount *m = MOUNT(u);
1098 return m->from_etc_fstab || m->from_proc_self_mountinfo;
1101 static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1102 Mount *m = MOUNT(u);
1108 if (pid != m->control_pid)
1113 success = is_clean_exit(code, status);
1114 m->failure = m->failure || !success;
1116 if (m->control_command) {
1117 exec_status_exit(&m->control_command->exec_status, pid, code, status, m->exec_context.utmp_id);
1118 m->control_command = NULL;
1119 m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
1122 log_full(success ? LOG_DEBUG : LOG_NOTICE,
1123 "%s mount process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1125 /* Note that mount(8) returning and the kernel sending us a
1126 * mount table change event might happen out-of-order. If an
1127 * operation succeed we assume the kernel will follow soon too
1128 * and already change into the resulting state. If it fails
1129 * we check if the kernel still knows about the mount. and
1130 * change state accordingly. */
1134 case MOUNT_MOUNTING:
1135 case MOUNT_MOUNTING_DONE:
1136 case MOUNT_MOUNTING_SIGKILL:
1137 case MOUNT_MOUNTING_SIGTERM:
1140 mount_enter_mounted(m, true);
1141 else if (m->from_proc_self_mountinfo)
1142 mount_enter_mounted(m, false);
1144 mount_enter_dead(m, false);
1147 case MOUNT_REMOUNTING:
1148 case MOUNT_REMOUNTING_SIGKILL:
1149 case MOUNT_REMOUNTING_SIGTERM:
1151 m->reload_failure = !success;
1152 if (m->from_proc_self_mountinfo)
1153 mount_enter_mounted(m, true);
1155 mount_enter_dead(m, true);
1159 case MOUNT_UNMOUNTING:
1160 case MOUNT_UNMOUNTING_SIGKILL:
1161 case MOUNT_UNMOUNTING_SIGTERM:
1164 mount_enter_dead(m, true);
1165 else if (m->from_proc_self_mountinfo)
1166 mount_enter_mounted(m, false);
1168 mount_enter_dead(m, false);
1172 assert_not_reached("Uh, control process died at wrong time.");
1175 /* Notify clients about changed exit status */
1176 unit_add_to_dbus_queue(u);
1179 static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1180 Mount *m = MOUNT(u);
1183 assert(elapsed == 1);
1184 assert(w == &m->timer_watch);
1188 case MOUNT_MOUNTING:
1189 case MOUNT_MOUNTING_DONE:
1190 log_warning("%s mounting timed out. Stopping.", u->meta.id);
1191 mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
1194 case MOUNT_REMOUNTING:
1195 log_warning("%s remounting timed out. Stopping.", u->meta.id);
1196 m->reload_failure = true;
1197 mount_enter_mounted(m, true);
1200 case MOUNT_UNMOUNTING:
1201 log_warning("%s unmounting timed out. Stopping.", u->meta.id);
1202 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
1205 case MOUNT_MOUNTING_SIGTERM:
1206 if (m->exec_context.send_sigkill) {
1207 log_warning("%s mounting timed out. Killing.", u->meta.id);
1208 mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
1210 log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
1212 if (m->from_proc_self_mountinfo)
1213 mount_enter_mounted(m, false);
1215 mount_enter_dead(m, false);
1219 case MOUNT_REMOUNTING_SIGTERM:
1220 if (m->exec_context.send_sigkill) {
1221 log_warning("%s remounting timed out. Killing.", u->meta.id);
1222 mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
1224 log_warning("%s remounting 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_UNMOUNTING_SIGTERM:
1234 if (m->exec_context.send_sigkill) {
1235 log_warning("%s unmounting timed out. Killing.", u->meta.id);
1236 mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
1238 log_warning("%s unmounting 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_MOUNTING_SIGKILL:
1248 case MOUNT_REMOUNTING_SIGKILL:
1249 case MOUNT_UNMOUNTING_SIGKILL:
1250 log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
1252 if (m->from_proc_self_mountinfo)
1253 mount_enter_mounted(m, false);
1255 mount_enter_dead(m, false);
1259 assert_not_reached("Timeout at wrong time.");
1263 static int mount_add_one(
1267 const char *options,
1270 bool from_proc_self_mountinfo,
1275 char *e, *w = NULL, *o = NULL, *f = NULL;
1284 assert(!set_flags || from_proc_self_mountinfo);
1286 /* Ignore API mount points. They should never be referenced in
1287 * dependencies ever. */
1288 if (mount_point_is_api(where))
1290 if (mount_point_ignore(where))
1293 if (streq(fstype, "autofs"))
1296 /* probably some kind of swap, ignore */
1297 if (!is_path(where))
1300 if (!(e = unit_name_from_path(where, ".mount")))
1303 if (!(u = manager_get_unit(m, e))) {
1306 if (!(u = unit_new(m))) {
1311 r = unit_add_name(u, e);
1317 if (!(MOUNT(u)->where = strdup(where))) {
1322 unit_add_to_load_queue(u);
1328 if (!(w = strdup(what)) ||
1329 !(o = strdup(options)) ||
1330 !(f = strdup(fstype))) {
1335 if (from_proc_self_mountinfo) {
1336 p = &MOUNT(u)->parameters_proc_self_mountinfo;
1339 MOUNT(u)->is_mounted = true;
1340 MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
1341 MOUNT(u)->just_changed = !streq_ptr(p->options, o);
1344 MOUNT(u)->from_proc_self_mountinfo = true;
1346 p = &MOUNT(u)->parameters_etc_fstab;
1347 MOUNT(u)->from_etc_fstab = true;
1361 unit_add_to_dbus_queue(u);
1376 static int mount_find_pri(char *options) {
1380 if (!(pri = mount_test_option(options, "pri=")))
1386 r = strtoul(pri, &end, 10);
1391 if (end == pri || (*end != ',' && *end != 0))
1397 static int mount_load_etc_fstab(Manager *m) {
1405 if (!(f = setmntent("/etc/fstab", "r")))
1408 while ((me = getmntent(f))) {
1412 if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
1417 if (!(where = strdup(me->mnt_dir))) {
1424 path_kill_slashes(what);
1426 if (where[0] == '/')
1427 path_kill_slashes(where);
1429 if (streq(me->mnt_type, "swap")) {
1432 if ((pri = mount_find_pri(me->mnt_opts)) < 0)
1439 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
1440 !!mount_test_option(me->mnt_opts, "nofail"),
1441 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
1444 k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
1459 static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
1462 char *device, *path, *options, *options2, *fstype, *d, *p, *o;
1466 rewind(m->proc_self_mountinfo);
1471 device = path = options = options2 = fstype = d = p = o = NULL;
1473 if ((k = fscanf(m->proc_self_mountinfo,
1474 "%*s " /* (1) mount id */
1475 "%*s " /* (2) parent id */
1476 "%*s " /* (3) major:minor */
1477 "%*s " /* (4) root */
1478 "%ms " /* (5) mount point */
1479 "%ms" /* (6) mount options */
1480 "%*[^-]" /* (7) optional fields */
1481 "- " /* (8) separator */
1482 "%ms " /* (9) file system type */
1483 "%ms" /* (10) mount source */
1484 "%ms" /* (11) mount options 2 */
1485 "%*[^\n]", /* some rubbish at the end */
1495 log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
1499 if (asprintf(&o, "%s,%s", options, options2) < 0) {
1504 if (!(d = cunescape(device)) ||
1505 !(p = cunescape(path))) {
1510 if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
1537 static void mount_shutdown(Manager *m) {
1540 if (m->proc_self_mountinfo) {
1541 fclose(m->proc_self_mountinfo);
1542 m->proc_self_mountinfo = NULL;
1546 static int mount_enumerate(Manager *m) {
1548 struct epoll_event ev;
1551 if (!m->proc_self_mountinfo) {
1552 if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
1555 m->mount_watch.type = WATCH_MOUNT;
1556 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
1559 ev.events = EPOLLPRI;
1560 ev.data.ptr = &m->mount_watch;
1562 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
1566 if ((r = mount_load_etc_fstab(m)) < 0)
1569 if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
1579 void mount_fd_event(Manager *m, int events) {
1584 assert(events & EPOLLPRI);
1586 /* The manager calls this for every fd event happening on the
1587 * /proc/self/mountinfo file, which informs us about mounting
1590 if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
1591 log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-r));
1593 /* Reset flags, just in case, for later calls */
1594 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1595 Mount *mount = (Mount*) meta;
1597 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1603 manager_dispatch_load_queue(m);
1605 LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
1606 Mount *mount = (Mount*) meta;
1608 if (!mount->is_mounted) {
1609 /* This has just been unmounted. */
1611 mount->from_proc_self_mountinfo = false;
1613 switch (mount->state) {
1616 mount_enter_dead(mount, true);
1620 mount_set_state(mount, mount->state);
1625 } else if (mount->just_mounted || mount->just_changed) {
1627 /* New or changed mount entry */
1629 switch (mount->state) {
1633 mount_enter_mounted(mount, true);
1636 case MOUNT_MOUNTING:
1637 mount_enter_mounting_done(mount);
1641 /* Nothing really changed, but let's
1642 * issue an notification call
1643 * nonetheless, in case somebody is
1644 * waiting for this. (e.g. file system
1645 * ro/rw remounts.) */
1646 mount_set_state(mount, mount->state);
1651 /* Reset the flags for later calls */
1652 mount->is_mounted = mount->just_mounted = mount->just_changed = false;
1656 static void mount_reset_failed(Unit *u) {
1657 Mount *m = MOUNT(u);
1661 if (m->state == MOUNT_FAILED)
1662 mount_set_state(m, MOUNT_DEAD);
1667 static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
1668 Mount *m = MOUNT(u);
1670 Set *pid_set = NULL;
1674 if (who == KILL_MAIN) {
1675 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
1679 if (m->control_pid <= 0 && who == KILL_CONTROL) {
1680 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
1684 if (m->control_pid > 0)
1685 if (kill(m->control_pid, signo) < 0)
1688 if (mode == KILL_CONTROL_GROUP) {
1691 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
1694 /* Exclude the control pid from being killed via the cgroup */
1695 if (m->control_pid > 0)
1696 if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
1701 if ((q = cgroup_bonding_kill_list(m->meta.cgroup_bondings, signo, false, pid_set)) < 0)
1702 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1713 static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
1714 [MOUNT_DEAD] = "dead",
1715 [MOUNT_MOUNTING] = "mounting",
1716 [MOUNT_MOUNTING_DONE] = "mounting-done",
1717 [MOUNT_MOUNTED] = "mounted",
1718 [MOUNT_REMOUNTING] = "remounting",
1719 [MOUNT_UNMOUNTING] = "unmounting",
1720 [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
1721 [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
1722 [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
1723 [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
1724 [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
1725 [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
1726 [MOUNT_FAILED] = "failed"
1729 DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
1731 static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
1732 [MOUNT_EXEC_MOUNT] = "ExecMount",
1733 [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
1734 [MOUNT_EXEC_REMOUNT] = "ExecRemount",
1737 DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
1739 const UnitVTable mount_vtable = {
1743 .no_instances = true,
1745 .show_status = true,
1751 .coldplug = mount_coldplug,
1755 .start = mount_start,
1757 .reload = mount_reload,
1761 .serialize = mount_serialize,
1762 .deserialize_item = mount_deserialize_item,
1764 .active_state = mount_active_state,
1765 .sub_state_to_string = mount_sub_state_to_string,
1767 .check_gc = mount_check_gc,
1769 .sigchld_event = mount_sigchld_event,
1770 .timer_event = mount_timer_event,
1772 .reset_failed = mount_reset_failed,
1774 .bus_interface = "org.freedesktop.systemd1.Mount",
1775 .bus_message_handler = bus_mount_message_handler,
1776 .bus_invalidating_properties = bus_mount_invalidating_properties,
1778 .enumerate = mount_enumerate,
1779 .shutdown = mount_shutdown