1 /* SPDX-License-Identifier: LGPL-2.1+ */
6 #include <linux/auto_dev-ioctl.h>
7 #include <linux/auto_fs4.h>
13 #include "alloc-util.h"
15 #include "automount.h"
16 #include "bus-error.h"
18 #include "dbus-automount.h"
19 #include "dbus-unit.h"
21 #include "format-util.h"
25 #include "mount-util.h"
27 #include "mountpoint-util.h"
28 #include "parse-util.h"
29 #include "path-util.h"
30 #include "process-util.h"
31 #include "serialize.h"
33 #include "stdio-util.h"
34 #include "string-table.h"
35 #include "string-util.h"
36 #include "unit-name.h"
39 static const UnitActiveState state_translation_table
[_AUTOMOUNT_STATE_MAX
] = {
40 [AUTOMOUNT_DEAD
] = UNIT_INACTIVE
,
41 [AUTOMOUNT_WAITING
] = UNIT_ACTIVE
,
42 [AUTOMOUNT_RUNNING
] = UNIT_ACTIVE
,
43 [AUTOMOUNT_FAILED
] = UNIT_FAILED
51 static void expire_data_free(struct expire_data
*data
) {
55 safe_close(data
->dev_autofs_fd
);
56 safe_close(data
->ioctl_fd
);
60 DEFINE_TRIVIAL_CLEANUP_FUNC(struct expire_data
*, expire_data_free
);
62 static int open_dev_autofs(Manager
*m
);
63 static int automount_dispatch_io(sd_event_source
*s
, int fd
, uint32_t events
, void *userdata
);
64 static int automount_start_expire(Automount
*a
);
65 static void automount_stop_expire(Automount
*a
);
66 static int automount_send_ready(Automount
*a
, Set
*tokens
, int status
);
68 static void automount_init(Unit
*u
) {
69 Automount
*a
= AUTOMOUNT(u
);
72 assert(u
->load_state
== UNIT_STUB
);
75 a
->directory_mode
= 0755;
76 UNIT(a
)->ignore_on_isolate
= true;
79 static void unmount_autofs(Automount
*a
) {
87 a
->pipe_event_source
= sd_event_source_unref(a
->pipe_event_source
);
88 a
->pipe_fd
= safe_close(a
->pipe_fd
);
90 /* If we reload/reexecute things we keep the mount point around */
91 if (!IN_SET(UNIT(a
)->manager
->objective
, MANAGER_RELOAD
, MANAGER_REEXECUTE
)) {
93 automount_send_ready(a
, a
->tokens
, -EHOSTDOWN
);
94 automount_send_ready(a
, a
->expire_tokens
, -EHOSTDOWN
);
97 r
= repeat_unmount(a
->where
, MNT_DETACH
);
99 log_error_errno(r
, "Failed to unmount: %m");
104 static void automount_done(Unit
*u
) {
105 Automount
*a
= AUTOMOUNT(u
);
111 a
->where
= mfree(a
->where
);
113 a
->tokens
= set_free(a
->tokens
);
114 a
->expire_tokens
= set_free(a
->expire_tokens
);
116 a
->expire_event_source
= sd_event_source_unref(a
->expire_event_source
);
119 static int automount_add_trigger_dependencies(Automount
*a
) {
125 r
= unit_load_related_unit(UNIT(a
), ".mount", &x
);
129 return unit_add_two_dependencies(UNIT(a
), UNIT_BEFORE
, UNIT_TRIGGERS
, x
, true, UNIT_DEPENDENCY_IMPLICIT
);
132 static int automount_add_mount_dependencies(Automount
*a
) {
133 _cleanup_free_
char *parent
= NULL
;
137 parent
= dirname_malloc(a
->where
);
141 return unit_require_mounts_for(UNIT(a
), parent
, UNIT_DEPENDENCY_IMPLICIT
);
144 static int automount_add_default_dependencies(Automount
*a
) {
149 if (!UNIT(a
)->default_dependencies
)
152 if (!MANAGER_IS_SYSTEM(UNIT(a
)->manager
))
155 r
= unit_add_dependency_by_name(UNIT(a
), UNIT_AFTER
, SPECIAL_LOCAL_FS_PRE_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
159 r
= unit_add_two_dependencies_by_name(UNIT(a
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_UMOUNT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
166 static int automount_verify(Automount
*a
) {
167 _cleanup_free_
char *e
= NULL
;
171 assert(UNIT(a
)->load_state
== UNIT_LOADED
);
173 if (path_equal(a
->where
, "/")) {
174 log_unit_error(UNIT(a
), "Cannot have an automount unit for the root directory. Refusing.");
178 r
= unit_name_from_path(a
->where
, ".automount", &e
);
180 return log_unit_error_errno(UNIT(a
), r
, "Failed to generate unit name from path: %m");
182 if (!unit_has_name(UNIT(a
), e
)) {
183 log_unit_error(UNIT(a
), "Where= setting doesn't match unit name. Refusing.");
190 static int automount_set_where(Automount
*a
) {
198 r
= unit_name_to_path(UNIT(a
)->id
, &a
->where
);
202 path_simplify(a
->where
, false);
206 static int automount_add_extras(Automount
*a
) {
209 r
= automount_set_where(a
);
213 r
= automount_add_trigger_dependencies(a
);
217 r
= automount_add_mount_dependencies(a
);
221 return automount_add_default_dependencies(a
);
224 static int automount_load(Unit
*u
) {
225 Automount
*a
= AUTOMOUNT(u
);
229 assert(u
->load_state
== UNIT_STUB
);
231 /* Load a .automount file */
232 r
= unit_load_fragment_and_dropin(u
, true);
236 if (u
->load_state
!= UNIT_LOADED
)
239 r
= automount_add_extras(a
);
243 return automount_verify(a
);
246 static void automount_set_state(Automount
*a
, AutomountState state
) {
247 AutomountState old_state
;
250 if (a
->state
!= state
)
251 bus_unit_send_pending_change_signal(UNIT(a
), false);
253 old_state
= a
->state
;
256 if (state
!= AUTOMOUNT_RUNNING
)
257 automount_stop_expire(a
);
259 if (!IN_SET(state
, AUTOMOUNT_WAITING
, AUTOMOUNT_RUNNING
))
262 if (state
!= old_state
)
263 log_unit_debug(UNIT(a
), "Changed %s -> %s", automount_state_to_string(old_state
), automount_state_to_string(state
));
265 unit_notify(UNIT(a
), state_translation_table
[old_state
], state_translation_table
[state
], 0);
268 static int automount_coldplug(Unit
*u
) {
269 Automount
*a
= AUTOMOUNT(u
);
273 assert(a
->state
== AUTOMOUNT_DEAD
);
275 if (a
->deserialized_state
== a
->state
)
278 if (IN_SET(a
->deserialized_state
, AUTOMOUNT_WAITING
, AUTOMOUNT_RUNNING
)) {
280 r
= automount_set_where(a
);
284 r
= open_dev_autofs(u
->manager
);
288 assert(a
->pipe_fd
>= 0);
290 r
= sd_event_add_io(u
->manager
->event
, &a
->pipe_event_source
, a
->pipe_fd
, EPOLLIN
, automount_dispatch_io
, u
);
294 (void) sd_event_source_set_description(a
->pipe_event_source
, "automount-io");
295 if (a
->deserialized_state
== AUTOMOUNT_RUNNING
) {
296 r
= automount_start_expire(a
);
298 log_unit_warning_errno(UNIT(a
), r
, "Failed to start expiration timer, ignoring: %m");
301 automount_set_state(a
, a
->deserialized_state
);
307 static void automount_dump(Unit
*u
, FILE *f
, const char *prefix
) {
308 char time_string
[FORMAT_TIMESPAN_MAX
];
309 Automount
*a
= AUTOMOUNT(u
);
314 "%sAutomount State: %s\n"
317 "%sDirectoryMode: %04o\n"
318 "%sTimeoutIdleUSec: %s\n",
319 prefix
, automount_state_to_string(a
->state
),
320 prefix
, automount_result_to_string(a
->result
),
322 prefix
, a
->directory_mode
,
323 prefix
, format_timespan(time_string
, FORMAT_TIMESPAN_MAX
, a
->timeout_idle_usec
, USEC_PER_SEC
));
326 static void automount_enter_dead(Automount
*a
, AutomountResult f
) {
329 if (a
->result
== AUTOMOUNT_SUCCESS
)
332 unit_log_result(UNIT(a
), a
->result
== AUTOMOUNT_SUCCESS
, automount_result_to_string(a
->result
));
333 automount_set_state(a
, a
->result
!= AUTOMOUNT_SUCCESS
? AUTOMOUNT_FAILED
: AUTOMOUNT_DEAD
);
336 static int open_dev_autofs(Manager
*m
) {
337 struct autofs_dev_ioctl param
;
341 if (m
->dev_autofs_fd
>= 0)
342 return m
->dev_autofs_fd
;
344 (void) label_fix("/dev/autofs", 0);
346 m
->dev_autofs_fd
= open("/dev/autofs", O_CLOEXEC
|O_RDONLY
);
347 if (m
->dev_autofs_fd
< 0)
348 return log_error_errno(errno
, "Failed to open /dev/autofs: %m");
350 init_autofs_dev_ioctl(¶m
);
351 if (ioctl(m
->dev_autofs_fd
, AUTOFS_DEV_IOCTL_VERSION
, ¶m
) < 0) {
352 m
->dev_autofs_fd
= safe_close(m
->dev_autofs_fd
);
356 log_debug("Autofs kernel version %i.%i", param
.ver_major
, param
.ver_minor
);
358 return m
->dev_autofs_fd
;
361 static int open_ioctl_fd(int dev_autofs_fd
, const char *where
, dev_t devid
) {
362 struct autofs_dev_ioctl
*param
;
365 assert(dev_autofs_fd
>= 0);
368 l
= sizeof(struct autofs_dev_ioctl
) + strlen(where
) + 1;
371 init_autofs_dev_ioctl(param
);
374 param
->openmount
.devid
= devid
;
375 strcpy(param
->path
, where
);
377 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_OPENMOUNT
, param
) < 0)
380 if (param
->ioctlfd
< 0)
383 (void) fd_cloexec(param
->ioctlfd
, true);
384 return param
->ioctlfd
;
387 static int autofs_protocol(int dev_autofs_fd
, int ioctl_fd
) {
388 uint32_t major
, minor
;
389 struct autofs_dev_ioctl param
;
391 assert(dev_autofs_fd
>= 0);
392 assert(ioctl_fd
>= 0);
394 init_autofs_dev_ioctl(¶m
);
395 param
.ioctlfd
= ioctl_fd
;
397 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_PROTOVER
, ¶m
) < 0)
400 major
= param
.protover
.version
;
402 init_autofs_dev_ioctl(¶m
);
403 param
.ioctlfd
= ioctl_fd
;
405 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_PROTOSUBVER
, ¶m
) < 0)
408 minor
= param
.protosubver
.sub_version
;
410 log_debug("Autofs protocol version %i.%i", major
, minor
);
414 static int autofs_set_timeout(int dev_autofs_fd
, int ioctl_fd
, usec_t usec
) {
415 struct autofs_dev_ioctl param
;
417 assert(dev_autofs_fd
>= 0);
418 assert(ioctl_fd
>= 0);
420 init_autofs_dev_ioctl(¶m
);
421 param
.ioctlfd
= ioctl_fd
;
423 if (usec
== USEC_INFINITY
)
424 param
.timeout
.timeout
= 0;
426 /* Convert to seconds, rounding up. */
427 param
.timeout
.timeout
= DIV_ROUND_UP(usec
, USEC_PER_SEC
);
429 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_TIMEOUT
, ¶m
) < 0)
435 static int autofs_send_ready(int dev_autofs_fd
, int ioctl_fd
, uint32_t token
, int status
) {
436 struct autofs_dev_ioctl param
;
438 assert(dev_autofs_fd
>= 0);
439 assert(ioctl_fd
>= 0);
441 init_autofs_dev_ioctl(¶m
);
442 param
.ioctlfd
= ioctl_fd
;
445 param
.fail
.token
= token
;
446 param
.fail
.status
= status
;
448 param
.ready
.token
= token
;
450 if (ioctl(dev_autofs_fd
, status
? AUTOFS_DEV_IOCTL_FAIL
: AUTOFS_DEV_IOCTL_READY
, ¶m
) < 0)
456 static int automount_send_ready(Automount
*a
, Set
*tokens
, int status
) {
457 _cleanup_close_
int ioctl_fd
= -1;
464 if (set_isempty(tokens
))
467 ioctl_fd
= open_ioctl_fd(UNIT(a
)->manager
->dev_autofs_fd
, a
->where
, a
->dev_id
);
472 log_unit_debug_errno(UNIT(a
), status
, "Sending failure: %m");
474 log_unit_debug(UNIT(a
), "Sending success.");
478 /* Autofs thankfully does not hand out 0 as a token */
479 while ((token
= PTR_TO_UINT(set_steal_first(tokens
)))) {
484 * if you pass a positive status code here, kernels
485 * prior to 4.12 will freeze! Yay! */
487 k
= autofs_send_ready(UNIT(a
)->manager
->dev_autofs_fd
,
498 static void automount_trigger_notify(Unit
*u
, Unit
*other
) {
499 Automount
*a
= AUTOMOUNT(u
);
505 /* Filter out invocations with bogus state */
506 if (other
->load_state
!= UNIT_LOADED
|| other
->type
!= UNIT_MOUNT
)
509 /* Don't propagate state changes from the mount if we are already down */
510 if (!IN_SET(a
->state
, AUTOMOUNT_WAITING
, AUTOMOUNT_RUNNING
))
513 /* Propagate start limit hit state */
514 if (other
->start_limit_hit
) {
515 automount_enter_dead(a
, AUTOMOUNT_FAILURE_MOUNT_START_LIMIT_HIT
);
519 /* Don't propagate anything if there's still a job queued */
523 /* The mount is successfully established */
524 if (IN_SET(MOUNT(other
)->state
, MOUNT_MOUNTED
, MOUNT_REMOUNTING
)) {
525 (void) automount_send_ready(a
, a
->tokens
, 0);
527 r
= automount_start_expire(a
);
529 log_unit_warning_errno(UNIT(a
), r
, "Failed to start expiration timer, ignoring: %m");
531 automount_set_state(a
, AUTOMOUNT_RUNNING
);
534 if (IN_SET(MOUNT(other
)->state
,
535 MOUNT_MOUNTING
, MOUNT_MOUNTING_DONE
,
536 MOUNT_MOUNTED
, MOUNT_REMOUNTING
,
537 MOUNT_REMOUNTING_SIGTERM
, MOUNT_REMOUNTING_SIGKILL
,
538 MOUNT_UNMOUNTING_SIGTERM
, MOUNT_UNMOUNTING_SIGKILL
,
541 (void) automount_send_ready(a
, a
->expire_tokens
, -ENODEV
);
544 if (MOUNT(other
)->state
== MOUNT_DEAD
)
545 (void) automount_send_ready(a
, a
->expire_tokens
, 0);
547 /* The mount is in some unhappy state now, let's unfreeze any waiting clients */
548 if (IN_SET(MOUNT(other
)->state
,
549 MOUNT_DEAD
, MOUNT_UNMOUNTING
,
550 MOUNT_REMOUNTING_SIGTERM
, MOUNT_REMOUNTING_SIGKILL
,
551 MOUNT_UNMOUNTING_SIGTERM
, MOUNT_UNMOUNTING_SIGKILL
,
554 (void) automount_send_ready(a
, a
->tokens
, -ENODEV
);
556 automount_set_state(a
, AUTOMOUNT_WAITING
);
560 static void automount_enter_waiting(Automount
*a
) {
561 _cleanup_close_
int ioctl_fd
= -1;
562 int p
[2] = { -1, -1 };
563 char name
[STRLEN("systemd-") + DECIMAL_STR_MAX(pid_t
) + 1];
564 char options
[STRLEN("fd=,pgrp=,minproto=5,maxproto=5,direct")
565 + DECIMAL_STR_MAX(int) + DECIMAL_STR_MAX(gid_t
) + 1];
566 bool mounted
= false;
567 int r
, dev_autofs_fd
;
571 assert(a
->pipe_fd
< 0);
574 set_clear(a
->tokens
);
576 r
= unit_fail_if_noncanonical(UNIT(a
), a
->where
);
580 (void) mkdir_p_label(a
->where
, a
->directory_mode
);
582 unit_warn_if_dir_nonempty(UNIT(a
), a
->where
);
584 dev_autofs_fd
= open_dev_autofs(UNIT(a
)->manager
);
585 if (dev_autofs_fd
< 0) {
590 if (pipe2(p
, O_CLOEXEC
) < 0) {
594 r
= fd_nonblock(p
[0], true);
598 xsprintf(options
, "fd=%i,pgrp="PID_FMT
",minproto=5,maxproto=5,direct", p
[1], getpgrp());
599 xsprintf(name
, "systemd-"PID_FMT
, getpid_cached());
600 if (mount(name
, a
->where
, "autofs", 0, options
) < 0) {
607 p
[1] = safe_close(p
[1]);
609 if (stat(a
->where
, &st
) < 0) {
614 ioctl_fd
= open_ioctl_fd(dev_autofs_fd
, a
->where
, st
.st_dev
);
620 r
= autofs_protocol(dev_autofs_fd
, ioctl_fd
);
624 r
= autofs_set_timeout(dev_autofs_fd
, ioctl_fd
, a
->timeout_idle_usec
);
628 r
= sd_event_add_io(UNIT(a
)->manager
->event
, &a
->pipe_event_source
, p
[0], EPOLLIN
, automount_dispatch_io
, a
);
632 (void) sd_event_source_set_description(a
->pipe_event_source
, "automount-io");
635 a
->dev_id
= st
.st_dev
;
637 automount_set_state(a
, AUTOMOUNT_WAITING
);
642 log_unit_error_errno(UNIT(a
), r
, "Failed to initialize automounter: %m");
647 r
= repeat_unmount(a
->where
, MNT_DETACH
);
649 log_error_errno(r
, "Failed to unmount, ignoring: %m");
652 automount_enter_dead(a
, AUTOMOUNT_FAILURE_RESOURCES
);
655 static void *expire_thread(void *p
) {
656 struct autofs_dev_ioctl param
;
657 _cleanup_(expire_data_freep
) struct expire_data
*data
= (struct expire_data
*)p
;
660 assert(data
->dev_autofs_fd
>= 0);
661 assert(data
->ioctl_fd
>= 0);
663 init_autofs_dev_ioctl(¶m
);
664 param
.ioctlfd
= data
->ioctl_fd
;
667 r
= ioctl(data
->dev_autofs_fd
, AUTOFS_DEV_IOCTL_EXPIRE
, ¶m
);
671 log_warning_errno(errno
, "Failed to expire automount, ignoring: %m");
676 static int automount_dispatch_expire(sd_event_source
*source
, usec_t usec
, void *userdata
) {
677 Automount
*a
= AUTOMOUNT(userdata
);
678 _cleanup_(expire_data_freep
) struct expire_data
*data
= NULL
;
682 assert(source
== a
->expire_event_source
);
684 data
= new0(struct expire_data
, 1);
690 data
->dev_autofs_fd
= fcntl(UNIT(a
)->manager
->dev_autofs_fd
, F_DUPFD_CLOEXEC
, 3);
691 if (data
->dev_autofs_fd
< 0)
692 return log_unit_error_errno(UNIT(a
), errno
, "Failed to duplicate autofs fd: %m");
694 data
->ioctl_fd
= open_ioctl_fd(UNIT(a
)->manager
->dev_autofs_fd
, a
->where
, a
->dev_id
);
695 if (data
->ioctl_fd
< 0)
696 return log_unit_error_errno(UNIT(a
), data
->ioctl_fd
, "Couldn't open autofs ioctl fd: %m");
698 r
= asynchronous_job(expire_thread
, data
);
700 return log_unit_error_errno(UNIT(a
), r
, "Failed to start expire job: %m");
704 return automount_start_expire(a
);
707 static int automount_start_expire(Automount
*a
) {
713 if (a
->timeout_idle_usec
== 0)
716 timeout
= now(CLOCK_MONOTONIC
) + MAX(a
->timeout_idle_usec
/3, USEC_PER_SEC
);
718 if (a
->expire_event_source
) {
719 r
= sd_event_source_set_time(a
->expire_event_source
, timeout
);
723 return sd_event_source_set_enabled(a
->expire_event_source
, SD_EVENT_ONESHOT
);
726 r
= sd_event_add_time(
727 UNIT(a
)->manager
->event
,
728 &a
->expire_event_source
,
729 CLOCK_MONOTONIC
, timeout
, 0,
730 automount_dispatch_expire
, a
);
734 (void) sd_event_source_set_description(a
->expire_event_source
, "automount-expire");
739 static void automount_stop_expire(Automount
*a
) {
742 if (!a
->expire_event_source
)
745 (void) sd_event_source_set_enabled(a
->expire_event_source
, SD_EVENT_OFF
);
748 static void automount_enter_running(Automount
*a
) {
749 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
756 /* If the user masked our unit in the meantime, fail */
757 if (UNIT(a
)->load_state
!= UNIT_LOADED
) {
758 log_unit_error(UNIT(a
), "Suppressing automount event since unit is no longer loaded.");
762 /* We don't take mount requests anymore if we are supposed to
763 * shut down anyway */
764 if (unit_stop_pending(UNIT(a
))) {
765 log_unit_debug(UNIT(a
), "Suppressing automount request since unit stop is scheduled.");
766 automount_send_ready(a
, a
->tokens
, -EHOSTDOWN
);
767 automount_send_ready(a
, a
->expire_tokens
, -EHOSTDOWN
);
771 (void) mkdir_p_label(a
->where
, a
->directory_mode
);
773 /* Before we do anything, let's see if somebody is playing games with us? */
774 if (lstat(a
->where
, &st
) < 0) {
775 log_unit_warning_errno(UNIT(a
), errno
, "Failed to stat automount point: %m");
779 /* The mount unit may have been explicitly started before we got the
780 * autofs request. Ack it to unblock anything waiting on the mount point. */
781 if (!S_ISDIR(st
.st_mode
) || st
.st_dev
!= a
->dev_id
) {
782 log_unit_info(UNIT(a
), "Automount point already active?");
783 automount_send_ready(a
, a
->tokens
, 0);
787 trigger
= UNIT_TRIGGER(UNIT(a
));
789 log_unit_error(UNIT(a
), "Unit to trigger vanished.");
793 r
= manager_add_job(UNIT(a
)->manager
, JOB_START
, trigger
, JOB_REPLACE
, NULL
, &error
, NULL
);
795 log_unit_warning(UNIT(a
), "Failed to queue mount startup job: %s", bus_error_message(&error
, r
));
799 automount_set_state(a
, AUTOMOUNT_RUNNING
);
803 automount_enter_dead(a
, AUTOMOUNT_FAILURE_RESOURCES
);
806 static int automount_start(Unit
*u
) {
807 Automount
*a
= AUTOMOUNT(u
);
811 assert(IN_SET(a
->state
, AUTOMOUNT_DEAD
, AUTOMOUNT_FAILED
));
813 if (path_is_mount_point(a
->where
, NULL
, 0) > 0) {
814 log_unit_error(u
, "Path %s is already a mount point, refusing start.", a
->where
);
818 r
= unit_test_trigger_loaded(u
);
822 r
= unit_test_start_limit(u
);
824 automount_enter_dead(a
, AUTOMOUNT_FAILURE_START_LIMIT_HIT
);
828 r
= unit_acquire_invocation_id(u
);
832 a
->result
= AUTOMOUNT_SUCCESS
;
833 automount_enter_waiting(a
);
837 static int automount_stop(Unit
*u
) {
838 Automount
*a
= AUTOMOUNT(u
);
841 assert(IN_SET(a
->state
, AUTOMOUNT_WAITING
, AUTOMOUNT_RUNNING
));
843 automount_enter_dead(a
, AUTOMOUNT_SUCCESS
);
847 static int automount_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
848 Automount
*a
= AUTOMOUNT(u
);
857 (void) serialize_item(f
, "state", automount_state_to_string(a
->state
));
858 (void) serialize_item(f
, "result", automount_result_to_string(a
->result
));
859 (void) serialize_item_format(f
, "dev-id", "%lu", (unsigned long) a
->dev_id
);
861 SET_FOREACH(p
, a
->tokens
, i
)
862 (void) serialize_item_format(f
, "token", "%u", PTR_TO_UINT(p
));
863 SET_FOREACH(p
, a
->expire_tokens
, i
)
864 (void) serialize_item_format(f
, "expire-token", "%u", PTR_TO_UINT(p
));
866 r
= serialize_fd(f
, fds
, "pipe-fd", a
->pipe_fd
);
873 static int automount_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
874 Automount
*a
= AUTOMOUNT(u
);
880 if (streq(key
, "state")) {
881 AutomountState state
;
883 state
= automount_state_from_string(value
);
885 log_unit_debug(u
, "Failed to parse state value: %s", value
);
887 a
->deserialized_state
= state
;
888 } else if (streq(key
, "result")) {
891 f
= automount_result_from_string(value
);
893 log_unit_debug(u
, "Failed to parse result value: %s", value
);
894 else if (f
!= AUTOMOUNT_SUCCESS
)
897 } else if (streq(key
, "dev-id")) {
900 if (safe_atolu(value
, &d
) < 0)
901 log_unit_debug(u
, "Failed to parse dev-id value: %s", value
);
903 a
->dev_id
= (dev_t
) d
;
905 } else if (streq(key
, "token")) {
908 if (safe_atou(value
, &token
) < 0)
909 log_unit_debug(u
, "Failed to parse token value: %s", value
);
911 r
= set_ensure_allocated(&a
->tokens
, NULL
);
917 r
= set_put(a
->tokens
, UINT_TO_PTR(token
));
919 log_unit_error_errno(u
, r
, "Failed to add token to set: %m");
921 } else if (streq(key
, "expire-token")) {
924 if (safe_atou(value
, &token
) < 0)
925 log_unit_debug(u
, "Failed to parse token value: %s", value
);
927 r
= set_ensure_allocated(&a
->expire_tokens
, NULL
);
933 r
= set_put(a
->expire_tokens
, UINT_TO_PTR(token
));
935 log_unit_error_errno(u
, r
, "Failed to add expire token to set: %m");
937 } else if (streq(key
, "pipe-fd")) {
940 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
941 log_unit_debug(u
, "Failed to parse pipe-fd value: %s", value
);
943 safe_close(a
->pipe_fd
);
944 a
->pipe_fd
= fdset_remove(fds
, fd
);
947 log_unit_debug(u
, "Unknown serialization key: %s", key
);
952 static UnitActiveState
automount_active_state(Unit
*u
) {
955 return state_translation_table
[AUTOMOUNT(u
)->state
];
958 static const char *automount_sub_state_to_string(Unit
*u
) {
961 return automount_state_to_string(AUTOMOUNT(u
)->state
);
964 static bool automount_may_gc(Unit
*u
) {
973 return UNIT_VTABLE(t
)->may_gc(t
);
976 static int automount_dispatch_io(sd_event_source
*s
, int fd
, uint32_t events
, void *userdata
) {
977 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
978 union autofs_v5_packet_union packet
;
979 Automount
*a
= AUTOMOUNT(userdata
);
984 assert(fd
== a
->pipe_fd
);
986 if (events
!= EPOLLIN
) {
987 log_unit_error(UNIT(a
), "Got invalid poll event %"PRIu32
" on pipe (fd=%d)", events
, fd
);
991 r
= loop_read_exact(a
->pipe_fd
, &packet
, sizeof(packet
), true);
993 log_unit_error_errno(UNIT(a
), r
, "Invalid read from pipe: %m");
997 switch (packet
.hdr
.type
) {
999 case autofs_ptype_missing_direct
:
1001 if (packet
.v5_packet
.pid
> 0) {
1002 _cleanup_free_
char *p
= NULL
;
1004 get_process_comm(packet
.v5_packet
.pid
, &p
);
1005 log_unit_info(UNIT(a
), "Got automount request for %s, triggered by %"PRIu32
" (%s)", a
->where
, packet
.v5_packet
.pid
, strna(p
));
1007 log_unit_debug(UNIT(a
), "Got direct mount request on %s", a
->where
);
1009 r
= set_ensure_allocated(&a
->tokens
, NULL
);
1011 log_unit_error(UNIT(a
), "Failed to allocate token set.");
1015 r
= set_put(a
->tokens
, UINT_TO_PTR(packet
.v5_packet
.wait_queue_token
));
1017 log_unit_error_errno(UNIT(a
), r
, "Failed to remember token: %m");
1021 automount_enter_running(a
);
1024 case autofs_ptype_expire_direct
:
1025 log_unit_debug(UNIT(a
), "Got direct umount request on %s", a
->where
);
1027 automount_stop_expire(a
);
1029 r
= set_ensure_allocated(&a
->expire_tokens
, NULL
);
1031 log_unit_error(UNIT(a
), "Failed to allocate token set.");
1035 r
= set_put(a
->expire_tokens
, UINT_TO_PTR(packet
.v5_packet
.wait_queue_token
));
1037 log_unit_error_errno(UNIT(a
), r
, "Failed to remember token: %m");
1041 trigger
= UNIT_TRIGGER(UNIT(a
));
1043 log_unit_error(UNIT(a
), "Unit to trigger vanished.");
1047 r
= manager_add_job(UNIT(a
)->manager
, JOB_STOP
, trigger
, JOB_REPLACE
, NULL
, &error
, NULL
);
1049 log_unit_warning(UNIT(a
), "Failed to queue umount startup job: %s", bus_error_message(&error
, r
));
1055 log_unit_error(UNIT(a
), "Received unknown automount request %i", packet
.hdr
.type
);
1062 automount_enter_dead(a
, AUTOMOUNT_FAILURE_RESOURCES
);
1066 static void automount_shutdown(Manager
*m
) {
1069 m
->dev_autofs_fd
= safe_close(m
->dev_autofs_fd
);
1072 static void automount_reset_failed(Unit
*u
) {
1073 Automount
*a
= AUTOMOUNT(u
);
1077 if (a
->state
== AUTOMOUNT_FAILED
)
1078 automount_set_state(a
, AUTOMOUNT_DEAD
);
1080 a
->result
= AUTOMOUNT_SUCCESS
;
1083 static bool automount_supported(void) {
1084 static int supported
= -1;
1087 supported
= access("/dev/autofs", F_OK
) >= 0;
1092 static const char* const automount_result_table
[_AUTOMOUNT_RESULT_MAX
] = {
1093 [AUTOMOUNT_SUCCESS
] = "success",
1094 [AUTOMOUNT_FAILURE_RESOURCES
] = "resources",
1095 [AUTOMOUNT_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
1096 [AUTOMOUNT_FAILURE_MOUNT_START_LIMIT_HIT
] = "mount-start-limit-hit",
1099 DEFINE_STRING_TABLE_LOOKUP(automount_result
, AutomountResult
);
1101 const UnitVTable automount_vtable
= {
1102 .object_size
= sizeof(Automount
),
1109 .init
= automount_init
,
1110 .load
= automount_load
,
1111 .done
= automount_done
,
1113 .coldplug
= automount_coldplug
,
1115 .dump
= automount_dump
,
1117 .start
= automount_start
,
1118 .stop
= automount_stop
,
1120 .serialize
= automount_serialize
,
1121 .deserialize_item
= automount_deserialize_item
,
1123 .active_state
= automount_active_state
,
1124 .sub_state_to_string
= automount_sub_state_to_string
,
1126 .may_gc
= automount_may_gc
,
1128 .trigger_notify
= automount_trigger_notify
,
1130 .reset_failed
= automount_reset_failed
,
1132 .bus_vtable
= bus_automount_vtable
,
1133 .bus_set_property
= bus_automount_set_property
,
1135 .can_transient
= true,
1137 .shutdown
= automount_shutdown
,
1138 .supported
= automount_supported
,
1140 .status_message_formats
= {
1141 .finished_start_job
= {
1142 [JOB_DONE
] = "Set up automount %s.",
1143 [JOB_FAILED
] = "Failed to set up automount %s.",
1145 .finished_stop_job
= {
1146 [JOB_DONE
] = "Unset automount %s.",
1147 [JOB_FAILED
] = "Failed to unset automount %s.",