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 Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include <sys/mount.h>
27 #include <sys/epoll.h>
29 #include <linux/auto_fs4.h>
30 #include <linux/auto_dev-ioctl.h>
33 #include "automount.h"
35 #include "unit-name.h"
39 #include "path-util.h"
40 #include "dbus-automount.h"
42 #include "bus-error.h"
43 #include "formats-util.h"
44 #include "process-util.h"
47 static const UnitActiveState state_translation_table
[_AUTOMOUNT_STATE_MAX
] = {
48 [AUTOMOUNT_DEAD
] = UNIT_INACTIVE
,
49 [AUTOMOUNT_WAITING
] = UNIT_ACTIVE
,
50 [AUTOMOUNT_RUNNING
] = UNIT_ACTIVE
,
51 [AUTOMOUNT_FAILED
] = UNIT_FAILED
59 static inline void expire_data_free(struct expire_data
*data
) {
63 safe_close(data
->dev_autofs_fd
);
64 safe_close(data
->ioctl_fd
);
68 DEFINE_TRIVIAL_CLEANUP_FUNC(struct expire_data
*, expire_data_free
);
70 static int open_dev_autofs(Manager
*m
);
71 static int automount_dispatch_io(sd_event_source
*s
, int fd
, uint32_t events
, void *userdata
);
73 static void automount_init(Unit
*u
) {
74 Automount
*a
= AUTOMOUNT(u
);
77 assert(u
->load_state
== UNIT_STUB
);
80 a
->directory_mode
= 0755;
81 UNIT(a
)->ignore_on_isolate
= true;
84 static void repeat_unmount(const char *path
) {
88 /* If there are multiple mounts on a mount point, this
91 if (umount2(path
, MNT_DETACH
) >= 0)
95 log_error_errno(errno
, "Failed to unmount: %m");
101 static int automount_send_ready(Automount
*a
, Set
*tokens
, int status
);
103 static void unmount_autofs(Automount
*a
) {
109 automount_send_ready(a
, a
->tokens
, -EHOSTDOWN
);
110 automount_send_ready(a
, a
->expire_tokens
, -EHOSTDOWN
);
112 a
->pipe_event_source
= sd_event_source_unref(a
->pipe_event_source
);
113 a
->pipe_fd
= safe_close(a
->pipe_fd
);
115 /* If we reload/reexecute things we keep the mount point
118 (UNIT(a
)->manager
->exit_code
!= MANAGER_RELOAD
&&
119 UNIT(a
)->manager
->exit_code
!= MANAGER_REEXECUTE
))
120 repeat_unmount(a
->where
);
123 static void automount_done(Unit
*u
) {
124 Automount
*a
= AUTOMOUNT(u
);
135 set_free(a
->expire_tokens
);
136 a
->expire_tokens
= NULL
;
138 a
->expire_event_source
= sd_event_source_unref(a
->expire_event_source
);
141 static int automount_add_mount_links(Automount
*a
) {
142 _cleanup_free_
char *parent
= NULL
;
147 r
= path_get_parent(a
->where
, &parent
);
151 return unit_require_mounts_for(UNIT(a
), parent
);
154 static int automount_add_default_dependencies(Automount
*a
) {
159 if (UNIT(a
)->manager
->running_as
!= MANAGER_SYSTEM
)
162 r
= unit_add_two_dependencies_by_name(UNIT(a
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_UMOUNT_TARGET
, NULL
, true);
169 static int automount_verify(Automount
*a
) {
170 _cleanup_free_
char *e
= NULL
;
175 if (UNIT(a
)->load_state
!= UNIT_LOADED
)
178 if (path_equal(a
->where
, "/")) {
179 log_unit_error(UNIT(a
), "Cannot have an automount unit for the root directory. Refusing.");
183 r
= unit_name_from_path(a
->where
, ".automount", &e
);
185 return log_unit_error(UNIT(a
), "Failed to generate unit name from path: %m");
187 if (!unit_has_name(UNIT(a
), e
)) {
188 log_unit_error(UNIT(a
), "Where= setting doesn't match unit name. Refusing.");
195 static int automount_load(Unit
*u
) {
196 Automount
*a
= AUTOMOUNT(u
);
200 assert(u
->load_state
== UNIT_STUB
);
202 /* Load a .automount file */
203 r
= unit_load_fragment_and_dropin_optional(u
);
207 if (u
->load_state
== UNIT_LOADED
) {
211 r
= unit_name_to_path(u
->id
, &a
->where
);
216 path_kill_slashes(a
->where
);
218 r
= unit_load_related_unit(u
, ".mount", &x
);
222 r
= unit_add_two_dependencies(u
, UNIT_BEFORE
, UNIT_TRIGGERS
, x
, true);
226 r
= automount_add_mount_links(a
);
230 if (UNIT(a
)->default_dependencies
) {
231 r
= automount_add_default_dependencies(a
);
237 return automount_verify(a
);
240 static void automount_set_state(Automount
*a
, AutomountState state
) {
241 AutomountState old_state
;
244 old_state
= a
->state
;
247 if (state
!= AUTOMOUNT_WAITING
&&
248 state
!= AUTOMOUNT_RUNNING
)
251 if (state
!= old_state
)
252 log_unit_debug(UNIT(a
), "Changed %s -> %s", automount_state_to_string(old_state
), automount_state_to_string(state
));
254 unit_notify(UNIT(a
), state_translation_table
[old_state
], state_translation_table
[state
], true);
257 static int automount_coldplug(Unit
*u
) {
258 Automount
*a
= AUTOMOUNT(u
);
262 assert(a
->state
== AUTOMOUNT_DEAD
);
264 if (a
->deserialized_state
!= a
->state
) {
266 r
= open_dev_autofs(u
->manager
);
270 if (a
->deserialized_state
== AUTOMOUNT_WAITING
||
271 a
->deserialized_state
== AUTOMOUNT_RUNNING
) {
272 assert(a
->pipe_fd
>= 0);
274 r
= sd_event_add_io(u
->manager
->event
, &a
->pipe_event_source
, a
->pipe_fd
, EPOLLIN
, automount_dispatch_io
, u
);
278 (void) sd_event_source_set_description(a
->pipe_event_source
, "automount-io");
281 automount_set_state(a
, a
->deserialized_state
);
287 static void automount_dump(Unit
*u
, FILE *f
, const char *prefix
) {
288 char time_string
[FORMAT_TIMESPAN_MAX
];
289 Automount
*a
= AUTOMOUNT(u
);
294 "%sAutomount State: %s\n"
297 "%sDirectoryMode: %04o\n"
298 "%sTimeoutIdleUSec: %s\n",
299 prefix
, automount_state_to_string(a
->state
),
300 prefix
, automount_result_to_string(a
->result
),
302 prefix
, a
->directory_mode
,
303 prefix
, format_timespan(time_string
, FORMAT_TIMESPAN_MAX
, a
->timeout_idle_usec
, USEC_PER_SEC
));
306 static void automount_enter_dead(Automount
*a
, AutomountResult f
) {
309 if (f
!= AUTOMOUNT_SUCCESS
)
312 automount_set_state(a
, a
->result
!= AUTOMOUNT_SUCCESS
? AUTOMOUNT_FAILED
: AUTOMOUNT_DEAD
);
315 static int open_dev_autofs(Manager
*m
) {
316 struct autofs_dev_ioctl param
;
320 if (m
->dev_autofs_fd
>= 0)
321 return m
->dev_autofs_fd
;
323 label_fix("/dev/autofs", false, false);
325 m
->dev_autofs_fd
= open("/dev/autofs", O_CLOEXEC
|O_RDONLY
);
326 if (m
->dev_autofs_fd
< 0)
327 return log_error_errno(errno
, "Failed to open /dev/autofs: %m");
329 init_autofs_dev_ioctl(¶m
);
330 if (ioctl(m
->dev_autofs_fd
, AUTOFS_DEV_IOCTL_VERSION
, ¶m
) < 0) {
331 m
->dev_autofs_fd
= safe_close(m
->dev_autofs_fd
);
335 log_debug("Autofs kernel version %i.%i", param
.ver_major
, param
.ver_minor
);
337 return m
->dev_autofs_fd
;
340 static int open_ioctl_fd(int dev_autofs_fd
, const char *where
, dev_t devid
) {
341 struct autofs_dev_ioctl
*param
;
344 assert(dev_autofs_fd
>= 0);
347 l
= sizeof(struct autofs_dev_ioctl
) + strlen(where
) + 1;
350 init_autofs_dev_ioctl(param
);
353 param
->openmount
.devid
= devid
;
354 strcpy(param
->path
, where
);
356 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_OPENMOUNT
, param
) < 0)
359 if (param
->ioctlfd
< 0)
362 (void) fd_cloexec(param
->ioctlfd
, true);
363 return param
->ioctlfd
;
366 static int autofs_protocol(int dev_autofs_fd
, int ioctl_fd
) {
367 uint32_t major
, minor
;
368 struct autofs_dev_ioctl param
;
370 assert(dev_autofs_fd
>= 0);
371 assert(ioctl_fd
>= 0);
373 init_autofs_dev_ioctl(¶m
);
374 param
.ioctlfd
= ioctl_fd
;
376 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_PROTOVER
, ¶m
) < 0)
379 major
= param
.protover
.version
;
381 init_autofs_dev_ioctl(¶m
);
382 param
.ioctlfd
= ioctl_fd
;
384 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_PROTOSUBVER
, ¶m
) < 0)
387 minor
= param
.protosubver
.sub_version
;
389 log_debug("Autofs protocol version %i.%i", major
, minor
);
393 static int autofs_set_timeout(int dev_autofs_fd
, int ioctl_fd
, usec_t usec
) {
394 struct autofs_dev_ioctl param
;
396 assert(dev_autofs_fd
>= 0);
397 assert(ioctl_fd
>= 0);
399 init_autofs_dev_ioctl(¶m
);
400 param
.ioctlfd
= ioctl_fd
;
402 /* Convert to seconds, rounding up. */
403 param
.timeout
.timeout
= (usec
+ USEC_PER_SEC
- 1) / USEC_PER_SEC
;
405 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_TIMEOUT
, ¶m
) < 0)
411 static int autofs_send_ready(int dev_autofs_fd
, int ioctl_fd
, uint32_t token
, int status
) {
412 struct autofs_dev_ioctl param
;
414 assert(dev_autofs_fd
>= 0);
415 assert(ioctl_fd
>= 0);
417 init_autofs_dev_ioctl(¶m
);
418 param
.ioctlfd
= ioctl_fd
;
421 param
.fail
.token
= token
;
422 param
.fail
.status
= status
;
424 param
.ready
.token
= token
;
426 if (ioctl(dev_autofs_fd
, status
? AUTOFS_DEV_IOCTL_FAIL
: AUTOFS_DEV_IOCTL_READY
, ¶m
) < 0)
432 static int automount_send_ready(Automount
*a
, Set
*tokens
, int status
) {
433 _cleanup_close_
int ioctl_fd
= -1;
440 if (set_isempty(tokens
))
443 ioctl_fd
= open_ioctl_fd(UNIT(a
)->manager
->dev_autofs_fd
, a
->where
, a
->dev_id
);
448 log_unit_debug_errno(UNIT(a
), status
, "Sending failure: %m");
450 log_unit_debug(UNIT(a
), "Sending success.");
454 /* Autofs thankfully does not hand out 0 as a token */
455 while ((token
= PTR_TO_UINT(set_steal_first(tokens
)))) {
458 /* Autofs fun fact II:
460 * if you pass a positive status code here, the kernel will
463 k
= autofs_send_ready(UNIT(a
)->manager
->dev_autofs_fd
,
474 int automount_update_mount(Automount
*a
, MountState old_state
, MountState state
) {
479 case MOUNT_REMOUNTING
:
480 automount_send_ready(a
, a
->tokens
, 0);
483 case MOUNT_UNMOUNTING
:
484 case MOUNT_MOUNTING_SIGTERM
:
485 case MOUNT_MOUNTING_SIGKILL
:
486 case MOUNT_REMOUNTING_SIGTERM
:
487 case MOUNT_REMOUNTING_SIGKILL
:
488 case MOUNT_UNMOUNTING_SIGTERM
:
489 case MOUNT_UNMOUNTING_SIGKILL
:
491 if (old_state
!= state
)
492 automount_send_ready(a
, a
->tokens
, -ENODEV
);
500 automount_send_ready(a
, a
->expire_tokens
, 0);
503 case MOUNT_MOUNTING_DONE
:
504 case MOUNT_MOUNTING_SIGTERM
:
505 case MOUNT_MOUNTING_SIGKILL
:
506 case MOUNT_REMOUNTING_SIGTERM
:
507 case MOUNT_REMOUNTING_SIGKILL
:
508 case MOUNT_UNMOUNTING_SIGTERM
:
509 case MOUNT_UNMOUNTING_SIGKILL
:
511 if (old_state
!= state
)
512 automount_send_ready(a
, a
->expire_tokens
, -ENODEV
);
521 static void automount_enter_waiting(Automount
*a
) {
522 _cleanup_close_
int ioctl_fd
= -1;
523 int p
[2] = { -1, -1 };
524 char name
[sizeof("systemd-")-1 + DECIMAL_STR_MAX(pid_t
) + 1];
525 char options
[sizeof("fd=,pgrp=,minproto=5,maxproto=5,direct")-1
526 + DECIMAL_STR_MAX(int) + DECIMAL_STR_MAX(gid_t
) + 1];
527 bool mounted
= false;
528 int r
, dev_autofs_fd
;
532 assert(a
->pipe_fd
< 0);
535 set_clear(a
->tokens
);
537 r
= unit_fail_if_symlink(UNIT(a
), a
->where
);
541 (void) mkdir_p_label(a
->where
, 0555);
543 unit_warn_if_dir_nonempty(UNIT(a
), a
->where
);
545 dev_autofs_fd
= open_dev_autofs(UNIT(a
)->manager
);
546 if (dev_autofs_fd
< 0) {
551 if (pipe2(p
, O_NONBLOCK
|O_CLOEXEC
) < 0) {
556 xsprintf(options
, "fd=%i,pgrp="PID_FMT
",minproto=5,maxproto=5,direct", p
[1], getpgrp());
557 xsprintf(name
, "systemd-"PID_FMT
, getpid());
558 if (mount(name
, a
->where
, "autofs", 0, options
) < 0) {
565 p
[1] = safe_close(p
[1]);
567 if (stat(a
->where
, &st
) < 0) {
572 ioctl_fd
= open_ioctl_fd(dev_autofs_fd
, a
->where
, st
.st_dev
);
578 r
= autofs_protocol(dev_autofs_fd
, ioctl_fd
);
582 r
= autofs_set_timeout(dev_autofs_fd
, ioctl_fd
, a
->timeout_idle_usec
);
588 * Unless we close the ioctl fd here, for some weird reason
589 * the direct mount will not receive events from the
592 r
= sd_event_add_io(UNIT(a
)->manager
->event
, &a
->pipe_event_source
, p
[0], EPOLLIN
, automount_dispatch_io
, a
);
596 (void) sd_event_source_set_description(a
->pipe_event_source
, "automount-io");
599 a
->dev_id
= st
.st_dev
;
601 automount_set_state(a
, AUTOMOUNT_WAITING
);
609 repeat_unmount(a
->where
);
611 log_unit_error_errno(UNIT(a
), r
, "Failed to initialize automounter: %m");
612 automount_enter_dead(a
, AUTOMOUNT_FAILURE_RESOURCES
);
615 static void *expire_thread(void *p
) {
616 struct autofs_dev_ioctl param
;
617 _cleanup_(expire_data_freep
) struct expire_data
*data
= (struct expire_data
*)p
;
620 assert(data
->dev_autofs_fd
>= 0);
621 assert(data
->ioctl_fd
>= 0);
623 init_autofs_dev_ioctl(¶m
);
624 param
.ioctlfd
= data
->ioctl_fd
;
627 r
= ioctl(data
->dev_autofs_fd
, AUTOFS_DEV_IOCTL_EXPIRE
, ¶m
);
631 log_warning_errno(errno
, "Failed to expire automount, ignoring: %m");
636 static int automount_start_expire(Automount
*a
);
638 static int automount_dispatch_expire(sd_event_source
*source
, usec_t usec
, void *userdata
) {
639 Automount
*a
= AUTOMOUNT(userdata
);
640 _cleanup_(expire_data_freep
) struct expire_data
*data
= NULL
;
644 assert(source
== a
->expire_event_source
);
646 data
= new0(struct expire_data
, 1);
652 data
->dev_autofs_fd
= fcntl(UNIT(a
)->manager
->dev_autofs_fd
, F_DUPFD_CLOEXEC
, 3);
653 if (data
->dev_autofs_fd
< 0)
654 return log_unit_error_errno(UNIT(a
), errno
, "Failed to duplicate autofs fd: %m");
656 data
->ioctl_fd
= open_ioctl_fd(UNIT(a
)->manager
->dev_autofs_fd
, a
->where
, a
->dev_id
);
657 if (data
->ioctl_fd
< 0)
658 return log_unit_error_errno(UNIT(a
), data
->ioctl_fd
, "Couldn't open autofs ioctl fd: %m");
660 r
= asynchronous_job(expire_thread
, data
);
662 return log_unit_error_errno(UNIT(a
), r
, "Failed to start expire job: %m");
666 return automount_start_expire(a
);
669 static int automount_start_expire(Automount
*a
) {
675 if (a
->timeout_idle_usec
== 0)
678 timeout
= now(CLOCK_MONOTONIC
) + MAX(a
->timeout_idle_usec
/3, USEC_PER_SEC
);
680 if (a
->expire_event_source
) {
681 r
= sd_event_source_set_time(a
->expire_event_source
, timeout
);
685 return sd_event_source_set_enabled(a
->expire_event_source
, SD_EVENT_ONESHOT
);
688 r
= sd_event_add_time(
689 UNIT(a
)->manager
->event
,
690 &a
->expire_event_source
,
691 CLOCK_MONOTONIC
, timeout
, 0,
692 automount_dispatch_expire
, a
);
696 (void) sd_event_source_set_description(a
->expire_event_source
, "automount-expire");
701 static void automount_enter_runnning(Automount
*a
) {
702 _cleanup_bus_error_free_ sd_bus_error error
= SD_BUS_ERROR_NULL
;
708 /* We don't take mount requests anymore if we are supposed to
709 * shut down anyway */
710 if (unit_stop_pending(UNIT(a
))) {
711 log_unit_debug(UNIT(a
), "Suppressing automount request since unit stop is scheduled.");
712 automount_send_ready(a
, a
->tokens
, -EHOSTDOWN
);
713 automount_send_ready(a
, a
->expire_tokens
, -EHOSTDOWN
);
717 mkdir_p_label(a
->where
, a
->directory_mode
);
719 /* Before we do anything, let's see if somebody is playing games with us? */
720 if (lstat(a
->where
, &st
) < 0) {
721 log_unit_warning_errno(UNIT(a
), errno
, "Failed to stat automount point: %m");
725 if (!S_ISDIR(st
.st_mode
) || st
.st_dev
!= a
->dev_id
)
726 log_unit_info(UNIT(a
), "Automount point already active?");
728 r
= manager_add_job(UNIT(a
)->manager
, JOB_START
, UNIT_TRIGGER(UNIT(a
)),
729 JOB_REPLACE
, true, &error
, NULL
);
731 log_unit_warning(UNIT(a
), "Failed to queue mount startup job: %s", bus_error_message(&error
, r
));
736 r
= automount_start_expire(a
);
738 log_unit_warning_errno(UNIT(a
), r
, "Failed to start expiration timer, ignoring: %m");
740 automount_set_state(a
, AUTOMOUNT_RUNNING
);
744 automount_enter_dead(a
, AUTOMOUNT_FAILURE_RESOURCES
);
747 static int automount_start(Unit
*u
) {
748 Automount
*a
= AUTOMOUNT(u
);
751 assert(a
->state
== AUTOMOUNT_DEAD
|| a
->state
== AUTOMOUNT_FAILED
);
753 if (path_is_mount_point(a
->where
, 0) > 0) {
754 log_unit_error(u
, "Path %s is already a mount point, refusing start.", a
->where
);
758 if (UNIT_TRIGGER(u
)->load_state
!= UNIT_LOADED
)
761 a
->result
= AUTOMOUNT_SUCCESS
;
762 automount_enter_waiting(a
);
766 static int automount_stop(Unit
*u
) {
767 Automount
*a
= AUTOMOUNT(u
);
770 assert(a
->state
== AUTOMOUNT_WAITING
|| a
->state
== AUTOMOUNT_RUNNING
);
772 automount_enter_dead(a
, AUTOMOUNT_SUCCESS
);
776 static int automount_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
777 Automount
*a
= AUTOMOUNT(u
);
785 unit_serialize_item(u
, f
, "state", automount_state_to_string(a
->state
));
786 unit_serialize_item(u
, f
, "result", automount_result_to_string(a
->result
));
787 unit_serialize_item_format(u
, f
, "dev-id", "%u", (unsigned) a
->dev_id
);
789 SET_FOREACH(p
, a
->tokens
, i
)
790 unit_serialize_item_format(u
, f
, "token", "%u", PTR_TO_UINT(p
));
791 SET_FOREACH(p
, a
->expire_tokens
, i
)
792 unit_serialize_item_format(u
, f
, "expire-token", "%u", PTR_TO_UINT(p
));
794 if (a
->pipe_fd
>= 0) {
797 copy
= fdset_put_dup(fds
, a
->pipe_fd
);
801 unit_serialize_item_format(u
, f
, "pipe-fd", "%i", copy
);
807 static int automount_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
808 Automount
*a
= AUTOMOUNT(u
);
814 if (streq(key
, "state")) {
815 AutomountState state
;
817 state
= automount_state_from_string(value
);
819 log_unit_debug(u
, "Failed to parse state value: %s", value
);
821 a
->deserialized_state
= state
;
822 } else if (streq(key
, "result")) {
825 f
= automount_result_from_string(value
);
827 log_unit_debug(u
, "Failed to parse result value: %s", value
);
828 else if (f
!= AUTOMOUNT_SUCCESS
)
831 } else if (streq(key
, "dev-id")) {
834 if (safe_atou(value
, &d
) < 0)
835 log_unit_debug(u
, "Failed to parse dev-id value: %s", value
);
837 a
->dev_id
= (unsigned) d
;
838 } else if (streq(key
, "token")) {
841 if (safe_atou(value
, &token
) < 0)
842 log_unit_debug(u
, "Failed to parse token value: %s", value
);
844 r
= set_ensure_allocated(&a
->tokens
, NULL
);
850 r
= set_put(a
->tokens
, UINT_TO_PTR(token
));
852 log_unit_error_errno(u
, r
, "Failed to add token to set: %m");
854 } else if (streq(key
, "expire-token")) {
857 if (safe_atou(value
, &token
) < 0)
858 log_unit_debug(u
, "Failed to parse token value: %s", value
);
860 r
= set_ensure_allocated(&a
->expire_tokens
, NULL
);
866 r
= set_put(a
->expire_tokens
, UINT_TO_PTR(token
));
868 log_unit_error_errno(u
, r
, "Failed to add expire token to set: %m");
870 } else if (streq(key
, "pipe-fd")) {
873 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
874 log_unit_debug(u
, "Failed to parse pipe-fd value: %s", value
);
876 safe_close(a
->pipe_fd
);
877 a
->pipe_fd
= fdset_remove(fds
, fd
);
880 log_unit_debug(u
, "Unknown serialization key: %s", key
);
885 static UnitActiveState
automount_active_state(Unit
*u
) {
888 return state_translation_table
[AUTOMOUNT(u
)->state
];
891 static const char *automount_sub_state_to_string(Unit
*u
) {
894 return automount_state_to_string(AUTOMOUNT(u
)->state
);
897 static bool automount_check_gc(Unit
*u
) {
900 if (!UNIT_TRIGGER(u
))
903 return UNIT_VTABLE(UNIT_TRIGGER(u
))->check_gc(UNIT_TRIGGER(u
));
906 static int automount_dispatch_io(sd_event_source
*s
, int fd
, uint32_t events
, void *userdata
) {
907 _cleanup_bus_error_free_ sd_bus_error error
= SD_BUS_ERROR_NULL
;
908 union autofs_v5_packet_union packet
;
909 Automount
*a
= AUTOMOUNT(userdata
);
913 assert(fd
== a
->pipe_fd
);
915 if (events
!= EPOLLIN
) {
916 log_unit_error(UNIT(a
), "Got invalid poll event %"PRIu32
" on pipe (fd=%d)", events
, fd
);
920 r
= loop_read_exact(a
->pipe_fd
, &packet
, sizeof(packet
), true);
922 log_unit_error_errno(UNIT(a
), r
, "Invalid read from pipe: %m");
926 switch (packet
.hdr
.type
) {
928 case autofs_ptype_missing_direct
:
930 if (packet
.v5_packet
.pid
> 0) {
931 _cleanup_free_
char *p
= NULL
;
933 get_process_comm(packet
.v5_packet
.pid
, &p
);
934 log_unit_info(UNIT(a
), "Got automount request for %s, triggered by %"PRIu32
" (%s)", a
->where
, packet
.v5_packet
.pid
, strna(p
));
936 log_unit_debug(UNIT(a
), "Got direct mount request on %s", a
->where
);
938 r
= set_ensure_allocated(&a
->tokens
, NULL
);
940 log_unit_error(UNIT(a
), "Failed to allocate token set.");
944 r
= set_put(a
->tokens
, UINT_TO_PTR(packet
.v5_packet
.wait_queue_token
));
946 log_unit_error_errno(UNIT(a
), r
, "Failed to remember token: %m");
950 automount_enter_runnning(a
);
953 case autofs_ptype_expire_direct
:
954 log_unit_debug(UNIT(a
), "Got direct umount request on %s", a
->where
);
956 (void) sd_event_source_set_enabled(a
->expire_event_source
, SD_EVENT_OFF
);
958 r
= set_ensure_allocated(&a
->expire_tokens
, NULL
);
960 log_unit_error(UNIT(a
), "Failed to allocate token set.");
964 r
= set_put(a
->expire_tokens
, UINT_TO_PTR(packet
.v5_packet
.wait_queue_token
));
966 log_unit_error_errno(UNIT(a
), r
, "Failed to remember token: %m");
969 r
= manager_add_job(UNIT(a
)->manager
, JOB_STOP
, UNIT_TRIGGER(UNIT(a
)), JOB_REPLACE
, true, &error
, NULL
);
971 log_unit_warning(UNIT(a
), "Failed to queue umount startup job: %s", bus_error_message(&error
, r
));
977 log_unit_error(UNIT(a
), "Received unknown automount request %i", packet
.hdr
.type
);
984 automount_enter_dead(a
, AUTOMOUNT_FAILURE_RESOURCES
);
988 static void automount_shutdown(Manager
*m
) {
991 m
->dev_autofs_fd
= safe_close(m
->dev_autofs_fd
);
994 static void automount_reset_failed(Unit
*u
) {
995 Automount
*a
= AUTOMOUNT(u
);
999 if (a
->state
== AUTOMOUNT_FAILED
)
1000 automount_set_state(a
, AUTOMOUNT_DEAD
);
1002 a
->result
= AUTOMOUNT_SUCCESS
;
1005 static bool automount_supported(void) {
1006 static int supported
= -1;
1009 supported
= access("/dev/autofs", F_OK
) >= 0;
1014 static const char* const automount_state_table
[_AUTOMOUNT_STATE_MAX
] = {
1015 [AUTOMOUNT_DEAD
] = "dead",
1016 [AUTOMOUNT_WAITING
] = "waiting",
1017 [AUTOMOUNT_RUNNING
] = "running",
1018 [AUTOMOUNT_FAILED
] = "failed"
1021 DEFINE_STRING_TABLE_LOOKUP(automount_state
, AutomountState
);
1023 static const char* const automount_result_table
[_AUTOMOUNT_RESULT_MAX
] = {
1024 [AUTOMOUNT_SUCCESS
] = "success",
1025 [AUTOMOUNT_FAILURE_RESOURCES
] = "resources"
1028 DEFINE_STRING_TABLE_LOOKUP(automount_result
, AutomountResult
);
1030 const UnitVTable automount_vtable
= {
1031 .object_size
= sizeof(Automount
),
1039 .no_instances
= true,
1041 .init
= automount_init
,
1042 .load
= automount_load
,
1043 .done
= automount_done
,
1045 .coldplug
= automount_coldplug
,
1047 .dump
= automount_dump
,
1049 .start
= automount_start
,
1050 .stop
= automount_stop
,
1052 .serialize
= automount_serialize
,
1053 .deserialize_item
= automount_deserialize_item
,
1055 .active_state
= automount_active_state
,
1056 .sub_state_to_string
= automount_sub_state_to_string
,
1058 .check_gc
= automount_check_gc
,
1060 .reset_failed
= automount_reset_failed
,
1062 .bus_interface
= "org.freedesktop.systemd1.Automount",
1063 .bus_vtable
= bus_automount_vtable
,
1065 .shutdown
= automount_shutdown
,
1066 .supported
= automount_supported
,
1068 .status_message_formats
= {
1069 .finished_start_job
= {
1070 [JOB_DONE
] = "Set up automount %s.",
1071 [JOB_FAILED
] = "Failed to set up automount %s.",
1073 .finished_stop_job
= {
1074 [JOB_DONE
] = "Unset automount %s.",
1075 [JOB_FAILED
] = "Failed to unset automount %s.",