2 This file is part of systemd.
4 Copyright 2010 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 #include <linux/auto_dev-ioctl.h>
24 #include <linux/auto_fs4.h>
25 #include <sys/epoll.h>
26 #include <sys/mount.h>
30 #include "alloc-util.h"
32 #include "automount.h"
33 #include "bus-error.h"
35 #include "dbus-automount.h"
37 #include "format-util.h"
41 #include "mount-util.h"
43 #include "parse-util.h"
44 #include "path-util.h"
45 #include "process-util.h"
47 #include "stdio-util.h"
48 #include "string-table.h"
49 #include "string-util.h"
50 #include "unit-name.h"
53 static const UnitActiveState state_translation_table
[_AUTOMOUNT_STATE_MAX
] = {
54 [AUTOMOUNT_DEAD
] = UNIT_INACTIVE
,
55 [AUTOMOUNT_WAITING
] = UNIT_ACTIVE
,
56 [AUTOMOUNT_RUNNING
] = UNIT_ACTIVE
,
57 [AUTOMOUNT_FAILED
] = UNIT_FAILED
65 static inline void expire_data_free(struct expire_data
*data
) {
69 safe_close(data
->dev_autofs_fd
);
70 safe_close(data
->ioctl_fd
);
74 DEFINE_TRIVIAL_CLEANUP_FUNC(struct expire_data
*, expire_data_free
);
76 static int open_dev_autofs(Manager
*m
);
77 static int automount_dispatch_io(sd_event_source
*s
, int fd
, uint32_t events
, void *userdata
);
78 static int automount_start_expire(Automount
*a
);
79 static void automount_stop_expire(Automount
*a
);
80 static int automount_send_ready(Automount
*a
, Set
*tokens
, int status
);
82 static void automount_init(Unit
*u
) {
83 Automount
*a
= AUTOMOUNT(u
);
86 assert(u
->load_state
== UNIT_STUB
);
89 a
->directory_mode
= 0755;
90 UNIT(a
)->ignore_on_isolate
= true;
93 static void unmount_autofs(Automount
*a
) {
101 a
->pipe_event_source
= sd_event_source_unref(a
->pipe_event_source
);
102 a
->pipe_fd
= safe_close(a
->pipe_fd
);
104 /* If we reload/reexecute things we keep the mount point around */
105 if (!IN_SET(UNIT(a
)->manager
->exit_code
, MANAGER_RELOAD
, MANAGER_REEXECUTE
)) {
107 automount_send_ready(a
, a
->tokens
, -EHOSTDOWN
);
108 automount_send_ready(a
, a
->expire_tokens
, -EHOSTDOWN
);
111 r
= repeat_unmount(a
->where
, MNT_DETACH
);
113 log_error_errno(r
, "Failed to unmount: %m");
118 static void automount_done(Unit
*u
) {
119 Automount
*a
= AUTOMOUNT(u
);
125 a
->where
= mfree(a
->where
);
127 a
->tokens
= set_free(a
->tokens
);
128 a
->expire_tokens
= set_free(a
->expire_tokens
);
130 a
->expire_event_source
= sd_event_source_unref(a
->expire_event_source
);
133 static int automount_add_mount_links(Automount
*a
) {
134 _cleanup_free_
char *parent
= NULL
;
138 parent
= dirname_malloc(a
->where
);
142 return unit_require_mounts_for(UNIT(a
), parent
);
145 static int automount_add_default_dependencies(Automount
*a
) {
150 if (!UNIT(a
)->default_dependencies
)
153 if (!MANAGER_IS_SYSTEM(UNIT(a
)->manager
))
156 r
= unit_add_two_dependencies_by_name(UNIT(a
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_UMOUNT_TARGET
, NULL
, true);
163 static int automount_verify(Automount
*a
) {
164 _cleanup_free_
char *e
= NULL
;
169 if (UNIT(a
)->load_state
!= UNIT_LOADED
)
172 if (path_equal(a
->where
, "/")) {
173 log_unit_error(UNIT(a
), "Cannot have an automount unit for the root directory. Refusing.");
177 r
= unit_name_from_path(a
->where
, ".automount", &e
);
179 return log_unit_error(UNIT(a
), "Failed to generate unit name from path: %m");
181 if (!unit_has_name(UNIT(a
), e
)) {
182 log_unit_error(UNIT(a
), "Where= setting doesn't match unit name. Refusing.");
189 static int automount_set_where(Automount
*a
) {
197 r
= unit_name_to_path(UNIT(a
)->id
, &a
->where
);
201 path_kill_slashes(a
->where
);
205 static int automount_load(Unit
*u
) {
206 Automount
*a
= AUTOMOUNT(u
);
210 assert(u
->load_state
== UNIT_STUB
);
212 /* Load a .automount file */
213 r
= unit_load_fragment_and_dropin_optional(u
);
217 if (u
->load_state
== UNIT_LOADED
) {
220 r
= automount_set_where(a
);
224 r
= unit_load_related_unit(u
, ".mount", &x
);
228 r
= unit_add_two_dependencies(u
, UNIT_BEFORE
, UNIT_TRIGGERS
, x
, true);
232 r
= automount_add_mount_links(a
);
236 r
= automount_add_default_dependencies(a
);
241 return automount_verify(a
);
244 static void automount_set_state(Automount
*a
, AutomountState state
) {
245 AutomountState old_state
;
248 old_state
= a
->state
;
251 if (state
!= AUTOMOUNT_RUNNING
)
252 automount_stop_expire(a
);
254 if (state
!= AUTOMOUNT_WAITING
&&
255 state
!= AUTOMOUNT_RUNNING
)
258 if (state
!= old_state
)
259 log_unit_debug(UNIT(a
), "Changed %s -> %s", automount_state_to_string(old_state
), automount_state_to_string(state
));
261 unit_notify(UNIT(a
), state_translation_table
[old_state
], state_translation_table
[state
], true);
264 static int automount_coldplug(Unit
*u
) {
265 Automount
*a
= AUTOMOUNT(u
);
269 assert(a
->state
== AUTOMOUNT_DEAD
);
271 if (a
->deserialized_state
== a
->state
)
274 if (IN_SET(a
->deserialized_state
, AUTOMOUNT_WAITING
, AUTOMOUNT_RUNNING
)) {
276 r
= automount_set_where(a
);
280 r
= open_dev_autofs(u
->manager
);
284 assert(a
->pipe_fd
>= 0);
286 r
= sd_event_add_io(u
->manager
->event
, &a
->pipe_event_source
, a
->pipe_fd
, EPOLLIN
, automount_dispatch_io
, u
);
290 (void) sd_event_source_set_description(a
->pipe_event_source
, "automount-io");
291 if (a
->deserialized_state
== AUTOMOUNT_RUNNING
) {
292 r
= automount_start_expire(a
);
294 log_unit_warning_errno(UNIT(a
), r
, "Failed to start expiration timer, ignoring: %m");
297 automount_set_state(a
, a
->deserialized_state
);
303 static void automount_dump(Unit
*u
, FILE *f
, const char *prefix
) {
304 char time_string
[FORMAT_TIMESPAN_MAX
];
305 Automount
*a
= AUTOMOUNT(u
);
310 "%sAutomount State: %s\n"
313 "%sDirectoryMode: %04o\n"
314 "%sTimeoutIdleUSec: %s\n",
315 prefix
, automount_state_to_string(a
->state
),
316 prefix
, automount_result_to_string(a
->result
),
318 prefix
, a
->directory_mode
,
319 prefix
, format_timespan(time_string
, FORMAT_TIMESPAN_MAX
, a
->timeout_idle_usec
, USEC_PER_SEC
));
322 static void automount_enter_dead(Automount
*a
, AutomountResult f
) {
325 if (a
->result
== AUTOMOUNT_SUCCESS
)
328 automount_set_state(a
, a
->result
!= AUTOMOUNT_SUCCESS
? AUTOMOUNT_FAILED
: AUTOMOUNT_DEAD
);
331 static int open_dev_autofs(Manager
*m
) {
332 struct autofs_dev_ioctl param
;
336 if (m
->dev_autofs_fd
>= 0)
337 return m
->dev_autofs_fd
;
339 label_fix("/dev/autofs", false, false);
341 m
->dev_autofs_fd
= open("/dev/autofs", O_CLOEXEC
|O_RDONLY
);
342 if (m
->dev_autofs_fd
< 0)
343 return log_error_errno(errno
, "Failed to open /dev/autofs: %m");
345 init_autofs_dev_ioctl(¶m
);
346 if (ioctl(m
->dev_autofs_fd
, AUTOFS_DEV_IOCTL_VERSION
, ¶m
) < 0) {
347 m
->dev_autofs_fd
= safe_close(m
->dev_autofs_fd
);
351 log_debug("Autofs kernel version %i.%i", param
.ver_major
, param
.ver_minor
);
353 return m
->dev_autofs_fd
;
356 static int open_ioctl_fd(int dev_autofs_fd
, const char *where
, dev_t devid
) {
357 struct autofs_dev_ioctl
*param
;
360 assert(dev_autofs_fd
>= 0);
363 l
= sizeof(struct autofs_dev_ioctl
) + strlen(where
) + 1;
366 init_autofs_dev_ioctl(param
);
369 param
->openmount
.devid
= devid
;
370 strcpy(param
->path
, where
);
372 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_OPENMOUNT
, param
) < 0)
375 if (param
->ioctlfd
< 0)
378 (void) fd_cloexec(param
->ioctlfd
, true);
379 return param
->ioctlfd
;
382 static int autofs_protocol(int dev_autofs_fd
, int ioctl_fd
) {
383 uint32_t major
, minor
;
384 struct autofs_dev_ioctl param
;
386 assert(dev_autofs_fd
>= 0);
387 assert(ioctl_fd
>= 0);
389 init_autofs_dev_ioctl(¶m
);
390 param
.ioctlfd
= ioctl_fd
;
392 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_PROTOVER
, ¶m
) < 0)
395 major
= param
.protover
.version
;
397 init_autofs_dev_ioctl(¶m
);
398 param
.ioctlfd
= ioctl_fd
;
400 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_PROTOSUBVER
, ¶m
) < 0)
403 minor
= param
.protosubver
.sub_version
;
405 log_debug("Autofs protocol version %i.%i", major
, minor
);
409 static int autofs_set_timeout(int dev_autofs_fd
, int ioctl_fd
, usec_t usec
) {
410 struct autofs_dev_ioctl param
;
412 assert(dev_autofs_fd
>= 0);
413 assert(ioctl_fd
>= 0);
415 init_autofs_dev_ioctl(¶m
);
416 param
.ioctlfd
= ioctl_fd
;
418 /* Convert to seconds, rounding up. */
419 param
.timeout
.timeout
= (usec
+ USEC_PER_SEC
- 1) / USEC_PER_SEC
;
421 if (ioctl(dev_autofs_fd
, AUTOFS_DEV_IOCTL_TIMEOUT
, ¶m
) < 0)
427 static int autofs_send_ready(int dev_autofs_fd
, int ioctl_fd
, uint32_t token
, int status
) {
428 struct autofs_dev_ioctl param
;
430 assert(dev_autofs_fd
>= 0);
431 assert(ioctl_fd
>= 0);
433 init_autofs_dev_ioctl(¶m
);
434 param
.ioctlfd
= ioctl_fd
;
437 param
.fail
.token
= token
;
438 param
.fail
.status
= status
;
440 param
.ready
.token
= token
;
442 if (ioctl(dev_autofs_fd
, status
? AUTOFS_DEV_IOCTL_FAIL
: AUTOFS_DEV_IOCTL_READY
, ¶m
) < 0)
448 static int automount_send_ready(Automount
*a
, Set
*tokens
, int status
) {
449 _cleanup_close_
int ioctl_fd
= -1;
456 if (set_isempty(tokens
))
459 ioctl_fd
= open_ioctl_fd(UNIT(a
)->manager
->dev_autofs_fd
, a
->where
, a
->dev_id
);
464 log_unit_debug_errno(UNIT(a
), status
, "Sending failure: %m");
466 log_unit_debug(UNIT(a
), "Sending success.");
470 /* Autofs thankfully does not hand out 0 as a token */
471 while ((token
= PTR_TO_UINT(set_steal_first(tokens
)))) {
474 /* Autofs fun fact II:
476 * if you pass a positive status code here, the kernel will
479 k
= autofs_send_ready(UNIT(a
)->manager
->dev_autofs_fd
,
490 static void automount_trigger_notify(Unit
*u
, Unit
*other
) {
491 Automount
*a
= AUTOMOUNT(u
);
497 /* Filter out invocations with bogus state */
498 if (other
->load_state
!= UNIT_LOADED
|| other
->type
!= UNIT_MOUNT
)
501 /* Don't propagate state changes from the mount if we are already down */
502 if (!IN_SET(a
->state
, AUTOMOUNT_WAITING
, AUTOMOUNT_RUNNING
))
505 /* Propagate start limit hit state */
506 if (other
->start_limit_hit
) {
507 automount_enter_dead(a
, AUTOMOUNT_FAILURE_MOUNT_START_LIMIT_HIT
);
511 /* Don't propagate anything if there's still a job queued */
515 /* The mount is successfully established */
516 if (IN_SET(MOUNT(other
)->state
, MOUNT_MOUNTED
, MOUNT_REMOUNTING
)) {
517 (void) automount_send_ready(a
, a
->tokens
, 0);
519 r
= automount_start_expire(a
);
521 log_unit_warning_errno(UNIT(a
), r
, "Failed to start expiration timer, ignoring: %m");
523 automount_set_state(a
, AUTOMOUNT_RUNNING
);
526 if (IN_SET(MOUNT(other
)->state
,
527 MOUNT_MOUNTING
, MOUNT_MOUNTING_DONE
,
528 MOUNT_MOUNTED
, MOUNT_REMOUNTING
,
529 MOUNT_MOUNTING_SIGTERM
, MOUNT_MOUNTING_SIGKILL
,
530 MOUNT_REMOUNTING_SIGTERM
, MOUNT_REMOUNTING_SIGKILL
,
531 MOUNT_UNMOUNTING_SIGTERM
, MOUNT_UNMOUNTING_SIGKILL
,
534 (void) automount_send_ready(a
, a
->expire_tokens
, -ENODEV
);
537 if (MOUNT(other
)->state
== MOUNT_DEAD
)
538 (void) automount_send_ready(a
, a
->expire_tokens
, 0);
540 /* The mount is in some unhappy state now, let's unfreeze any waiting clients */
541 if (IN_SET(MOUNT(other
)->state
,
542 MOUNT_DEAD
, MOUNT_UNMOUNTING
,
543 MOUNT_MOUNTING_SIGTERM
, MOUNT_MOUNTING_SIGKILL
,
544 MOUNT_REMOUNTING_SIGTERM
, MOUNT_REMOUNTING_SIGKILL
,
545 MOUNT_UNMOUNTING_SIGTERM
, MOUNT_UNMOUNTING_SIGKILL
,
548 (void) automount_send_ready(a
, a
->tokens
, -ENODEV
);
550 automount_set_state(a
, AUTOMOUNT_WAITING
);
554 static void automount_enter_waiting(Automount
*a
) {
555 _cleanup_close_
int ioctl_fd
= -1;
556 int p
[2] = { -1, -1 };
557 char name
[sizeof("systemd-")-1 + DECIMAL_STR_MAX(pid_t
) + 1];
558 char options
[sizeof("fd=,pgrp=,minproto=5,maxproto=5,direct")-1
559 + DECIMAL_STR_MAX(int) + DECIMAL_STR_MAX(gid_t
) + 1];
560 bool mounted
= false;
561 int r
, dev_autofs_fd
;
565 assert(a
->pipe_fd
< 0);
568 set_clear(a
->tokens
);
570 r
= unit_fail_if_symlink(UNIT(a
), a
->where
);
574 (void) mkdir_p_label(a
->where
, 0555);
576 unit_warn_if_dir_nonempty(UNIT(a
), a
->where
);
578 dev_autofs_fd
= open_dev_autofs(UNIT(a
)->manager
);
579 if (dev_autofs_fd
< 0) {
584 if (pipe2(p
, O_NONBLOCK
|O_CLOEXEC
) < 0) {
589 xsprintf(options
, "fd=%i,pgrp="PID_FMT
",minproto=5,maxproto=5,direct", p
[1], getpgrp());
590 xsprintf(name
, "systemd-"PID_FMT
, getpid());
591 if (mount(name
, a
->where
, "autofs", 0, options
) < 0) {
598 p
[1] = safe_close(p
[1]);
600 if (stat(a
->where
, &st
) < 0) {
605 ioctl_fd
= open_ioctl_fd(dev_autofs_fd
, a
->where
, st
.st_dev
);
611 r
= autofs_protocol(dev_autofs_fd
, ioctl_fd
);
615 r
= autofs_set_timeout(dev_autofs_fd
, ioctl_fd
, a
->timeout_idle_usec
);
621 * Unless we close the ioctl fd here, for some weird reason
622 * the direct mount will not receive events from the
625 r
= sd_event_add_io(UNIT(a
)->manager
->event
, &a
->pipe_event_source
, p
[0], EPOLLIN
, automount_dispatch_io
, a
);
629 (void) sd_event_source_set_description(a
->pipe_event_source
, "automount-io");
632 a
->dev_id
= st
.st_dev
;
634 automount_set_state(a
, AUTOMOUNT_WAITING
);
639 log_unit_error_errno(UNIT(a
), r
, "Failed to initialize automounter: %m");
644 r
= repeat_unmount(a
->where
, MNT_DETACH
);
646 log_error_errno(r
, "Failed to unmount, ignoring: %m");
649 automount_enter_dead(a
, AUTOMOUNT_FAILURE_RESOURCES
);
652 static void *expire_thread(void *p
) {
653 struct autofs_dev_ioctl param
;
654 _cleanup_(expire_data_freep
) struct expire_data
*data
= (struct expire_data
*)p
;
657 assert(data
->dev_autofs_fd
>= 0);
658 assert(data
->ioctl_fd
>= 0);
660 init_autofs_dev_ioctl(¶m
);
661 param
.ioctlfd
= data
->ioctl_fd
;
664 r
= ioctl(data
->dev_autofs_fd
, AUTOFS_DEV_IOCTL_EXPIRE
, ¶m
);
668 log_warning_errno(errno
, "Failed to expire automount, ignoring: %m");
673 static int automount_dispatch_expire(sd_event_source
*source
, usec_t usec
, void *userdata
) {
674 Automount
*a
= AUTOMOUNT(userdata
);
675 _cleanup_(expire_data_freep
) struct expire_data
*data
= NULL
;
679 assert(source
== a
->expire_event_source
);
681 data
= new0(struct expire_data
, 1);
687 data
->dev_autofs_fd
= fcntl(UNIT(a
)->manager
->dev_autofs_fd
, F_DUPFD_CLOEXEC
, 3);
688 if (data
->dev_autofs_fd
< 0)
689 return log_unit_error_errno(UNIT(a
), errno
, "Failed to duplicate autofs fd: %m");
691 data
->ioctl_fd
= open_ioctl_fd(UNIT(a
)->manager
->dev_autofs_fd
, a
->where
, a
->dev_id
);
692 if (data
->ioctl_fd
< 0)
693 return log_unit_error_errno(UNIT(a
), data
->ioctl_fd
, "Couldn't open autofs ioctl fd: %m");
695 r
= asynchronous_job(expire_thread
, data
);
697 return log_unit_error_errno(UNIT(a
), r
, "Failed to start expire job: %m");
701 return automount_start_expire(a
);
704 static int automount_start_expire(Automount
*a
) {
710 if (a
->timeout_idle_usec
== 0)
713 timeout
= now(CLOCK_MONOTONIC
) + MAX(a
->timeout_idle_usec
/3, USEC_PER_SEC
);
715 if (a
->expire_event_source
) {
716 r
= sd_event_source_set_time(a
->expire_event_source
, timeout
);
720 return sd_event_source_set_enabled(a
->expire_event_source
, SD_EVENT_ONESHOT
);
723 r
= sd_event_add_time(
724 UNIT(a
)->manager
->event
,
725 &a
->expire_event_source
,
726 CLOCK_MONOTONIC
, timeout
, 0,
727 automount_dispatch_expire
, a
);
731 (void) sd_event_source_set_description(a
->expire_event_source
, "automount-expire");
736 static void automount_stop_expire(Automount
*a
) {
739 if (!a
->expire_event_source
)
742 (void) sd_event_source_set_enabled(a
->expire_event_source
, SD_EVENT_OFF
);
745 static void automount_enter_running(Automount
*a
) {
746 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
753 /* If the user masked our unit in the meantime, fail */
754 if (UNIT(a
)->load_state
!= UNIT_LOADED
) {
755 log_unit_error(UNIT(a
), "Suppressing automount event since unit is no longer loaded.");
759 /* We don't take mount requests anymore if we are supposed to
760 * shut down anyway */
761 if (unit_stop_pending(UNIT(a
))) {
762 log_unit_debug(UNIT(a
), "Suppressing automount request since unit stop is scheduled.");
763 automount_send_ready(a
, a
->tokens
, -EHOSTDOWN
);
764 automount_send_ready(a
, a
->expire_tokens
, -EHOSTDOWN
);
768 mkdir_p_label(a
->where
, a
->directory_mode
);
770 /* Before we do anything, let's see if somebody is playing games with us? */
771 if (lstat(a
->where
, &st
) < 0) {
772 log_unit_warning_errno(UNIT(a
), errno
, "Failed to stat automount point: %m");
776 /* The mount unit may have been explicitly started before we got the
777 * autofs request. Ack it to unblock anything waiting on the mount point. */
778 if (!S_ISDIR(st
.st_mode
) || st
.st_dev
!= a
->dev_id
) {
779 log_unit_info(UNIT(a
), "Automount point already active?");
780 automount_send_ready(a
, a
->tokens
, 0);
784 trigger
= UNIT_TRIGGER(UNIT(a
));
786 log_unit_error(UNIT(a
), "Unit to trigger vanished.");
790 r
= manager_add_job(UNIT(a
)->manager
, JOB_START
, trigger
, JOB_REPLACE
, &error
, NULL
);
792 log_unit_warning(UNIT(a
), "Failed to queue mount startup job: %s", bus_error_message(&error
, r
));
796 automount_set_state(a
, AUTOMOUNT_RUNNING
);
800 automount_enter_dead(a
, AUTOMOUNT_FAILURE_RESOURCES
);
803 static int automount_start(Unit
*u
) {
804 Automount
*a
= AUTOMOUNT(u
);
809 assert(a
->state
== AUTOMOUNT_DEAD
|| a
->state
== AUTOMOUNT_FAILED
);
811 if (path_is_mount_point(a
->where
, NULL
, 0) > 0) {
812 log_unit_error(u
, "Path %s is already a mount point, refusing start.", a
->where
);
816 trigger
= UNIT_TRIGGER(u
);
817 if (!trigger
|| trigger
->load_state
!= UNIT_LOADED
) {
818 log_unit_error(u
, "Refusing to start, unit to trigger not loaded.");
822 r
= unit_start_limit_test(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(a
->state
== AUTOMOUNT_WAITING
|| a
->state
== 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 unit_serialize_item(u
, f
, "state", automount_state_to_string(a
->state
));
858 unit_serialize_item(u
, f
, "result", automount_result_to_string(a
->result
));
859 unit_serialize_item_format(u
, f
, "dev-id", "%u", (unsigned) a
->dev_id
);
861 SET_FOREACH(p
, a
->tokens
, i
)
862 unit_serialize_item_format(u
, f
, "token", "%u", PTR_TO_UINT(p
));
863 SET_FOREACH(p
, a
->expire_tokens
, i
)
864 unit_serialize_item_format(u
, f
, "expire-token", "%u", PTR_TO_UINT(p
));
866 r
= unit_serialize_item_fd(u
, 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_atou(value
, &d
) < 0)
901 log_unit_debug(u
, "Failed to parse dev-id value: %s", value
);
903 a
->dev_id
= (unsigned) d
;
904 } else if (streq(key
, "token")) {
907 if (safe_atou(value
, &token
) < 0)
908 log_unit_debug(u
, "Failed to parse token value: %s", value
);
910 r
= set_ensure_allocated(&a
->tokens
, NULL
);
916 r
= set_put(a
->tokens
, UINT_TO_PTR(token
));
918 log_unit_error_errno(u
, r
, "Failed to add token to set: %m");
920 } else if (streq(key
, "expire-token")) {
923 if (safe_atou(value
, &token
) < 0)
924 log_unit_debug(u
, "Failed to parse token value: %s", value
);
926 r
= set_ensure_allocated(&a
->expire_tokens
, NULL
);
932 r
= set_put(a
->expire_tokens
, UINT_TO_PTR(token
));
934 log_unit_error_errno(u
, r
, "Failed to add expire token to set: %m");
936 } else if (streq(key
, "pipe-fd")) {
939 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
940 log_unit_debug(u
, "Failed to parse pipe-fd value: %s", value
);
942 safe_close(a
->pipe_fd
);
943 a
->pipe_fd
= fdset_remove(fds
, fd
);
946 log_unit_debug(u
, "Unknown serialization key: %s", key
);
951 static UnitActiveState
automount_active_state(Unit
*u
) {
954 return state_translation_table
[AUTOMOUNT(u
)->state
];
957 static const char *automount_sub_state_to_string(Unit
*u
) {
960 return automount_state_to_string(AUTOMOUNT(u
)->state
);
963 static bool automount_check_gc(Unit
*u
) {
966 if (!UNIT_TRIGGER(u
))
969 return UNIT_VTABLE(UNIT_TRIGGER(u
))->check_gc(UNIT_TRIGGER(u
));
972 static int automount_dispatch_io(sd_event_source
*s
, int fd
, uint32_t events
, void *userdata
) {
973 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
974 union autofs_v5_packet_union packet
;
975 Automount
*a
= AUTOMOUNT(userdata
);
981 assert(fd
== a
->pipe_fd
);
983 if (events
!= EPOLLIN
) {
984 log_unit_error(UNIT(a
), "Got invalid poll event %"PRIu32
" on pipe (fd=%d)", events
, fd
);
988 r
= loop_read_exact(a
->pipe_fd
, &packet
, sizeof(packet
), true);
990 log_unit_error_errno(UNIT(a
), r
, "Invalid read from pipe: %m");
994 switch (packet
.hdr
.type
) {
996 case autofs_ptype_missing_direct
:
998 if (packet
.v5_packet
.pid
> 0) {
999 _cleanup_free_
char *p
= NULL
;
1001 get_process_comm(packet
.v5_packet
.pid
, &p
);
1002 log_unit_info(UNIT(a
), "Got automount request for %s, triggered by %"PRIu32
" (%s)", a
->where
, packet
.v5_packet
.pid
, strna(p
));
1004 log_unit_debug(UNIT(a
), "Got direct mount request on %s", a
->where
);
1006 r
= set_ensure_allocated(&a
->tokens
, NULL
);
1008 log_unit_error(UNIT(a
), "Failed to allocate token set.");
1012 r
= set_put(a
->tokens
, UINT_TO_PTR(packet
.v5_packet
.wait_queue_token
));
1014 log_unit_error_errno(UNIT(a
), r
, "Failed to remember token: %m");
1018 automount_enter_running(a
);
1021 case autofs_ptype_expire_direct
:
1022 log_unit_debug(UNIT(a
), "Got direct umount request on %s", a
->where
);
1024 automount_stop_expire(a
);
1026 r
= set_ensure_allocated(&a
->expire_tokens
, NULL
);
1028 log_unit_error(UNIT(a
), "Failed to allocate token set.");
1032 r
= set_put(a
->expire_tokens
, UINT_TO_PTR(packet
.v5_packet
.wait_queue_token
));
1034 log_unit_error_errno(UNIT(a
), r
, "Failed to remember token: %m");
1038 /* Before we do anything, let's see if somebody is playing games with us? */
1039 if (lstat(a
->where
, &st
) < 0) {
1040 log_unit_warning_errno(UNIT(a
), errno
, "Failed to stat automount point: %m");
1044 if (!S_ISDIR(st
.st_mode
) || st
.st_dev
== a
->dev_id
) {
1045 log_unit_info(UNIT(a
), "Automount point already unmounted?");
1046 automount_send_ready(a
, a
->expire_tokens
, 0);
1050 trigger
= UNIT_TRIGGER(UNIT(a
));
1052 log_unit_error(UNIT(a
), "Unit to trigger vanished.");
1056 r
= manager_add_job(UNIT(a
)->manager
, JOB_STOP
, trigger
, JOB_REPLACE
, &error
, NULL
);
1058 log_unit_warning(UNIT(a
), "Failed to queue umount startup job: %s", bus_error_message(&error
, r
));
1064 log_unit_error(UNIT(a
), "Received unknown automount request %i", packet
.hdr
.type
);
1071 automount_enter_dead(a
, AUTOMOUNT_FAILURE_RESOURCES
);
1075 static void automount_shutdown(Manager
*m
) {
1078 m
->dev_autofs_fd
= safe_close(m
->dev_autofs_fd
);
1081 static void automount_reset_failed(Unit
*u
) {
1082 Automount
*a
= AUTOMOUNT(u
);
1086 if (a
->state
== AUTOMOUNT_FAILED
)
1087 automount_set_state(a
, AUTOMOUNT_DEAD
);
1089 a
->result
= AUTOMOUNT_SUCCESS
;
1092 static bool automount_supported(void) {
1093 static int supported
= -1;
1096 supported
= access("/dev/autofs", F_OK
) >= 0;
1101 static const char* const automount_result_table
[_AUTOMOUNT_RESULT_MAX
] = {
1102 [AUTOMOUNT_SUCCESS
] = "success",
1103 [AUTOMOUNT_FAILURE_RESOURCES
] = "resources",
1104 [AUTOMOUNT_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
1105 [AUTOMOUNT_FAILURE_MOUNT_START_LIMIT_HIT
] = "mount-start-limit-hit",
1108 DEFINE_STRING_TABLE_LOOKUP(automount_result
, AutomountResult
);
1110 const UnitVTable automount_vtable
= {
1111 .object_size
= sizeof(Automount
),
1118 .init
= automount_init
,
1119 .load
= automount_load
,
1120 .done
= automount_done
,
1122 .coldplug
= automount_coldplug
,
1124 .dump
= automount_dump
,
1126 .start
= automount_start
,
1127 .stop
= automount_stop
,
1129 .serialize
= automount_serialize
,
1130 .deserialize_item
= automount_deserialize_item
,
1132 .active_state
= automount_active_state
,
1133 .sub_state_to_string
= automount_sub_state_to_string
,
1135 .check_gc
= automount_check_gc
,
1137 .trigger_notify
= automount_trigger_notify
,
1139 .reset_failed
= automount_reset_failed
,
1141 .bus_vtable
= bus_automount_vtable
,
1142 .bus_set_property
= bus_automount_set_property
,
1144 .can_transient
= true,
1146 .shutdown
= automount_shutdown
,
1147 .supported
= automount_supported
,
1149 .status_message_formats
= {
1150 .finished_start_job
= {
1151 [JOB_DONE
] = "Set up automount %s.",
1152 [JOB_FAILED
] = "Failed to set up automount %s.",
1154 .finished_stop_job
= {
1155 [JOB_DONE
] = "Unset automount %s.",
1156 [JOB_FAILED
] = "Failed to unset automount %s.",