1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
6 #include "alloc-util.h"
7 #include "bus-get-properties.h"
9 #include "bus-polkit.h"
11 #include "discover-image.h"
12 #include "dissect-image.h"
16 #include "image-dbus.h"
18 #include "loop-util.h"
19 #include "missing_capability.h"
20 #include "mount-util.h"
22 #include "process-util.h"
23 #include "raw-clone.h"
25 #include "user-util.h"
27 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type
, image_type
, ImageType
);
29 int bus_image_method_remove(
30 sd_bus_message
*message
,
32 sd_bus_error
*error
) {
34 _cleanup_close_pair_
int errno_pipe_fd
[2] = PIPE_EBADF
;
35 Image
*image
= ASSERT_PTR(userdata
);
36 Manager
*m
= image
->userdata
;
42 if (m
->n_operations
>= OPERATIONS_MAX
)
43 return sd_bus_error_set(error
, SD_BUS_ERROR_LIMITS_EXCEEDED
, "Too many ongoing operations.");
45 const char *details
[] = {
51 r
= bus_verify_polkit_async(
54 "org.freedesktop.machine1.manage-images",
63 return 1; /* Will call us back */
65 if (pipe2(errno_pipe_fd
, O_CLOEXEC
|O_NONBLOCK
) < 0)
66 return sd_bus_error_set_errnof(error
, errno
, "Failed to create pipe: %m");
68 r
= safe_fork("(sd-imgrm)", FORK_RESET_SIGNALS
, &child
);
70 return sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
72 errno_pipe_fd
[0] = safe_close(errno_pipe_fd
[0]);
74 r
= image_remove(image
);
76 (void) write(errno_pipe_fd
[1], &r
, sizeof(r
));
83 errno_pipe_fd
[1] = safe_close(errno_pipe_fd
[1]);
85 r
= operation_new(m
, NULL
, child
, message
, errno_pipe_fd
[0], NULL
);
87 (void) sigkill_wait(child
);
91 errno_pipe_fd
[0] = -EBADF
;
96 int bus_image_method_rename(
97 sd_bus_message
*message
,
99 sd_bus_error
*error
) {
101 Image
*image
= ASSERT_PTR(userdata
);
102 Manager
*m
= image
->userdata
;
103 const char *new_name
;
108 r
= sd_bus_message_read(message
, "s", &new_name
);
112 if (!image_name_is_valid(new_name
))
113 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Image name '%s' is invalid.", new_name
);
115 const char *details
[] = {
116 "image", image
->name
,
118 "new_name", new_name
,
122 r
= bus_verify_polkit_async(
125 "org.freedesktop.machine1.manage-images",
134 return 1; /* Will call us back */
136 r
= image_rename(image
, new_name
);
140 return sd_bus_reply_method_return(message
, NULL
);
143 int bus_image_method_clone(
144 sd_bus_message
*message
,
146 sd_bus_error
*error
) {
148 _cleanup_close_pair_
int errno_pipe_fd
[2] = PIPE_EBADF
;
149 Image
*image
= ASSERT_PTR(userdata
);
150 Manager
*m
= ASSERT_PTR(image
->userdata
);
151 const char *new_name
;
157 if (m
->n_operations
>= OPERATIONS_MAX
)
158 return sd_bus_error_set(error
, SD_BUS_ERROR_LIMITS_EXCEEDED
, "Too many ongoing operations.");
160 r
= sd_bus_message_read(message
, "sb", &new_name
, &read_only
);
164 if (!image_name_is_valid(new_name
))
165 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Image name '%s' is invalid.", new_name
);
167 const char *details
[] = {
168 "image", image
->name
,
170 "new_name", new_name
,
174 r
= bus_verify_polkit_async(
177 "org.freedesktop.machine1.manage-images",
186 return 1; /* Will call us back */
188 if (pipe2(errno_pipe_fd
, O_CLOEXEC
|O_NONBLOCK
) < 0)
189 return sd_bus_error_set_errnof(error
, errno
, "Failed to create pipe: %m");
191 r
= safe_fork("(sd-imgclone)", FORK_RESET_SIGNALS
, &child
);
193 return sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
195 errno_pipe_fd
[0] = safe_close(errno_pipe_fd
[0]);
197 r
= image_clone(image
, new_name
, read_only
);
199 (void) write(errno_pipe_fd
[1], &r
, sizeof(r
));
206 errno_pipe_fd
[1] = safe_close(errno_pipe_fd
[1]);
208 r
= operation_new(m
, NULL
, child
, message
, errno_pipe_fd
[0], NULL
);
210 (void) sigkill_wait(child
);
214 errno_pipe_fd
[0] = -EBADF
;
219 int bus_image_method_mark_read_only(
220 sd_bus_message
*message
,
222 sd_bus_error
*error
) {
224 Image
*image
= userdata
;
225 Manager
*m
= image
->userdata
;
230 r
= sd_bus_message_read(message
, "b", &read_only
);
234 const char *details
[] = {
235 "image", image
->name
,
236 "verb", "mark_read_only",
237 "read_only", one_zero(read_only
),
241 r
= bus_verify_polkit_async(
244 "org.freedesktop.machine1.manage-images",
253 return 1; /* Will call us back */
255 r
= image_read_only(image
, read_only
);
259 return sd_bus_reply_method_return(message
, NULL
);
262 int bus_image_method_set_limit(
263 sd_bus_message
*message
,
265 sd_bus_error
*error
) {
267 Image
*image
= userdata
;
268 Manager
*m
= image
->userdata
;
274 r
= sd_bus_message_read(message
, "t", &limit
);
277 if (!FILE_SIZE_VALID_OR_INFINITY(limit
))
278 return sd_bus_error_set(error
, SD_BUS_ERROR_INVALID_ARGS
, "New limit out of range");
280 const char *details
[] = {
281 "machine", image
->name
,
286 r
= bus_verify_polkit_async(
289 "org.freedesktop.machine1.manage-images",
298 return 1; /* Will call us back */
300 r
= image_set_limit(image
, limit
);
304 return sd_bus_reply_method_return(message
, NULL
);
307 int bus_image_method_get_hostname(
308 sd_bus_message
*message
,
310 sd_bus_error
*error
) {
312 Image
*image
= userdata
;
315 if (!image
->metadata_valid
) {
316 r
= image_read_metadata(image
, &image_policy_container
);
318 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
321 return sd_bus_reply_method_return(message
, "s", image
->hostname
);
324 int bus_image_method_get_machine_id(
325 sd_bus_message
*message
,
327 sd_bus_error
*error
) {
329 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
330 Image
*image
= userdata
;
333 if (!image
->metadata_valid
) {
334 r
= image_read_metadata(image
, &image_policy_container
);
336 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
339 r
= sd_bus_message_new_method_return(message
, &reply
);
343 if (sd_id128_is_null(image
->machine_id
)) /* Add an empty array if the ID is zero */
344 r
= sd_bus_message_append(reply
, "ay", 0);
346 r
= sd_bus_message_append_array(reply
, 'y', image
->machine_id
.bytes
, 16);
350 return sd_bus_send(NULL
, reply
, NULL
);
353 int bus_image_method_get_machine_info(
354 sd_bus_message
*message
,
356 sd_bus_error
*error
) {
358 Image
*image
= userdata
;
361 if (!image
->metadata_valid
) {
362 r
= image_read_metadata(image
, &image_policy_container
);
364 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
367 return bus_reply_pair_array(message
, image
->machine_info
);
370 int bus_image_method_get_os_release(
371 sd_bus_message
*message
,
373 sd_bus_error
*error
) {
375 Image
*image
= userdata
;
378 if (!image
->metadata_valid
) {
379 r
= image_read_metadata(image
, &image_policy_container
);
381 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
384 return bus_reply_pair_array(message
, image
->os_release
);
387 static int image_flush_cache(sd_event_source
*s
, void *userdata
) {
388 Manager
*m
= ASSERT_PTR(userdata
);
392 hashmap_clear(m
->image_cache
);
396 static int image_object_find(sd_bus
*bus
, const char *path
, const char *interface
, void *userdata
, void **found
, sd_bus_error
*error
) {
397 _cleanup_free_
char *e
= NULL
;
398 Manager
*m
= userdata
;
408 p
= startswith(path
, "/org/freedesktop/machine1/image/");
412 e
= bus_label_unescape(p
);
416 image
= hashmap_get(m
->image_cache
, e
);
422 if (!m
->image_cache_defer_event
) {
423 r
= sd_event_add_defer(m
->event
, &m
->image_cache_defer_event
, image_flush_cache
, m
);
427 r
= sd_event_source_set_priority(m
->image_cache_defer_event
, SD_EVENT_PRIORITY_IDLE
);
432 r
= sd_event_source_set_enabled(m
->image_cache_defer_event
, SD_EVENT_ONESHOT
);
436 r
= image_find(IMAGE_MACHINE
, e
, NULL
, &image
);
444 r
= hashmap_ensure_put(&m
->image_cache
, &image_hash_ops
, image
->name
, image
);
454 char *image_bus_path(const char *name
) {
455 _cleanup_free_
char *e
= NULL
;
459 e
= bus_label_escape(name
);
463 return strjoin("/org/freedesktop/machine1/image/", e
);
466 static int image_node_enumerator(sd_bus
*bus
, const char *path
, void *userdata
, char ***nodes
, sd_bus_error
*error
) {
467 _cleanup_hashmap_free_ Hashmap
*images
= NULL
;
468 _cleanup_strv_free_
char **l
= NULL
;
476 images
= hashmap_new(&image_hash_ops
);
480 r
= image_discover(IMAGE_MACHINE
, NULL
, images
);
484 HASHMAP_FOREACH(image
, images
) {
487 p
= image_bus_path(image
->name
);
491 r
= strv_consume(&l
, p
);
496 *nodes
= TAKE_PTR(l
);
501 const sd_bus_vtable image_vtable
[] = {
502 SD_BUS_VTABLE_START(0),
503 SD_BUS_PROPERTY("Name", "s", NULL
, offsetof(Image
, name
), 0),
504 SD_BUS_PROPERTY("Path", "s", NULL
, offsetof(Image
, path
), 0),
505 SD_BUS_PROPERTY("Type", "s", property_get_type
, offsetof(Image
, type
), 0),
506 SD_BUS_PROPERTY("ReadOnly", "b", bus_property_get_bool
, offsetof(Image
, read_only
), 0),
507 SD_BUS_PROPERTY("CreationTimestamp", "t", NULL
, offsetof(Image
, crtime
), 0),
508 SD_BUS_PROPERTY("ModificationTimestamp", "t", NULL
, offsetof(Image
, mtime
), 0),
509 SD_BUS_PROPERTY("Usage", "t", NULL
, offsetof(Image
, usage
), 0),
510 SD_BUS_PROPERTY("Limit", "t", NULL
, offsetof(Image
, limit
), 0),
511 SD_BUS_PROPERTY("UsageExclusive", "t", NULL
, offsetof(Image
, usage_exclusive
), 0),
512 SD_BUS_PROPERTY("LimitExclusive", "t", NULL
, offsetof(Image
, limit_exclusive
), 0),
513 SD_BUS_METHOD("Remove", NULL
, NULL
, bus_image_method_remove
, SD_BUS_VTABLE_UNPRIVILEGED
),
514 SD_BUS_METHOD("Rename", "s", NULL
, bus_image_method_rename
, SD_BUS_VTABLE_UNPRIVILEGED
),
515 SD_BUS_METHOD("Clone", "sb", NULL
, bus_image_method_clone
, SD_BUS_VTABLE_UNPRIVILEGED
),
516 SD_BUS_METHOD("MarkReadOnly", "b", NULL
, bus_image_method_mark_read_only
, SD_BUS_VTABLE_UNPRIVILEGED
),
517 SD_BUS_METHOD("SetLimit", "t", NULL
, bus_image_method_set_limit
, SD_BUS_VTABLE_UNPRIVILEGED
),
518 SD_BUS_METHOD("GetHostname", NULL
, "s", bus_image_method_get_hostname
, SD_BUS_VTABLE_UNPRIVILEGED
),
519 SD_BUS_METHOD("GetMachineID", NULL
, "ay", bus_image_method_get_machine_id
, SD_BUS_VTABLE_UNPRIVILEGED
),
520 SD_BUS_METHOD("GetMachineInfo", NULL
, "a{ss}", bus_image_method_get_machine_info
, SD_BUS_VTABLE_UNPRIVILEGED
),
521 SD_BUS_METHOD("GetOSRelease", NULL
, "a{ss}", bus_image_method_get_os_release
, SD_BUS_VTABLE_UNPRIVILEGED
),
525 const BusObjectImplementation image_object
= {
526 "/org/freedesktop/machine1/image",
527 "org.freedesktop.machine1.Image",
528 .fallback_vtables
= BUS_FALLBACK_VTABLES({image_vtable
, image_object_find
}),
529 .node_enumerator
= image_node_enumerator
,