1 /* SPDX-License-Identifier: LGPL-2.1+ */
6 #include "alloc-util.h"
7 #include "bus-get-properties.h"
9 #include "bus-polkit.h"
11 #include "dissect-image.h"
15 #include "image-dbus.h"
17 #include "loop-util.h"
18 #include "machine-image.h"
19 #include "missing_capability.h"
20 #include "mount-util.h"
21 #include "process-util.h"
22 #include "raw-clone.h"
24 #include "user-util.h"
26 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type
, image_type
, ImageType
);
28 int bus_image_method_remove(
29 sd_bus_message
*message
,
31 sd_bus_error
*error
) {
33 _cleanup_close_pair_
int errno_pipe_fd
[2] = { -1, -1 };
34 Image
*image
= userdata
;
35 Manager
*m
= image
->userdata
;
42 if (m
->n_operations
>= OPERATIONS_MAX
)
43 return sd_bus_error_setf(error
, SD_BUS_ERROR_LIMITS_EXCEEDED
, "Too many ongoing operations.");
45 r
= bus_verify_polkit_async(
48 "org.freedesktop.machine1.manage-images",
57 return 1; /* Will call us back */
59 if (pipe2(errno_pipe_fd
, O_CLOEXEC
|O_NONBLOCK
) < 0)
60 return sd_bus_error_set_errnof(error
, errno
, "Failed to create pipe: %m");
62 r
= safe_fork("(sd-imgrm)", FORK_RESET_SIGNALS
, &child
);
64 return sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
66 errno_pipe_fd
[0] = safe_close(errno_pipe_fd
[0]);
68 r
= image_remove(image
);
70 (void) write(errno_pipe_fd
[1], &r
, sizeof(r
));
77 errno_pipe_fd
[1] = safe_close(errno_pipe_fd
[1]);
79 r
= operation_new(m
, NULL
, child
, message
, errno_pipe_fd
[0], NULL
);
81 (void) sigkill_wait(child
);
85 errno_pipe_fd
[0] = -1;
90 int bus_image_method_rename(
91 sd_bus_message
*message
,
93 sd_bus_error
*error
) {
95 Image
*image
= userdata
;
96 Manager
*m
= image
->userdata
;
103 r
= sd_bus_message_read(message
, "s", &new_name
);
107 if (!image_name_is_valid(new_name
))
108 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Image name '%s' is invalid.", new_name
);
110 r
= bus_verify_polkit_async(
113 "org.freedesktop.machine1.manage-images",
122 return 1; /* Will call us back */
124 r
= image_rename(image
, new_name
);
128 return sd_bus_reply_method_return(message
, NULL
);
131 int bus_image_method_clone(
132 sd_bus_message
*message
,
134 sd_bus_error
*error
) {
136 _cleanup_close_pair_
int errno_pipe_fd
[2] = { -1, -1 };
137 Image
*image
= userdata
;
138 Manager
*m
= image
->userdata
;
139 const char *new_name
;
147 if (m
->n_operations
>= OPERATIONS_MAX
)
148 return sd_bus_error_setf(error
, SD_BUS_ERROR_LIMITS_EXCEEDED
, "Too many ongoing operations.");
150 r
= sd_bus_message_read(message
, "sb", &new_name
, &read_only
);
154 if (!image_name_is_valid(new_name
))
155 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Image name '%s' is invalid.", new_name
);
157 r
= bus_verify_polkit_async(
160 "org.freedesktop.machine1.manage-images",
169 return 1; /* Will call us back */
171 if (pipe2(errno_pipe_fd
, O_CLOEXEC
|O_NONBLOCK
) < 0)
172 return sd_bus_error_set_errnof(error
, errno
, "Failed to create pipe: %m");
174 r
= safe_fork("(sd-imgclone)", FORK_RESET_SIGNALS
, &child
);
176 return sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
178 errno_pipe_fd
[0] = safe_close(errno_pipe_fd
[0]);
180 r
= image_clone(image
, new_name
, read_only
);
182 (void) write(errno_pipe_fd
[1], &r
, sizeof(r
));
189 errno_pipe_fd
[1] = safe_close(errno_pipe_fd
[1]);
191 r
= operation_new(m
, NULL
, child
, message
, errno_pipe_fd
[0], NULL
);
193 (void) sigkill_wait(child
);
197 errno_pipe_fd
[0] = -1;
202 int bus_image_method_mark_read_only(
203 sd_bus_message
*message
,
205 sd_bus_error
*error
) {
207 Image
*image
= userdata
;
208 Manager
*m
= image
->userdata
;
213 r
= sd_bus_message_read(message
, "b", &read_only
);
217 r
= bus_verify_polkit_async(
220 "org.freedesktop.machine1.manage-images",
229 return 1; /* Will call us back */
231 r
= image_read_only(image
, read_only
);
235 return sd_bus_reply_method_return(message
, NULL
);
238 int bus_image_method_set_limit(
239 sd_bus_message
*message
,
241 sd_bus_error
*error
) {
243 Image
*image
= userdata
;
244 Manager
*m
= image
->userdata
;
250 r
= sd_bus_message_read(message
, "t", &limit
);
253 if (!FILE_SIZE_VALID_OR_INFINITY(limit
))
254 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "New limit out of range");
256 r
= bus_verify_polkit_async(
259 "org.freedesktop.machine1.manage-images",
268 return 1; /* Will call us back */
270 r
= image_set_limit(image
, limit
);
274 return sd_bus_reply_method_return(message
, NULL
);
277 int bus_image_method_get_hostname(
278 sd_bus_message
*message
,
280 sd_bus_error
*error
) {
282 Image
*image
= userdata
;
285 if (!image
->metadata_valid
) {
286 r
= image_read_metadata(image
);
288 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
291 return sd_bus_reply_method_return(message
, "s", image
->hostname
);
294 int bus_image_method_get_machine_id(
295 sd_bus_message
*message
,
297 sd_bus_error
*error
) {
299 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
300 Image
*image
= userdata
;
303 if (!image
->metadata_valid
) {
304 r
= image_read_metadata(image
);
306 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
309 r
= sd_bus_message_new_method_return(message
, &reply
);
313 if (sd_id128_is_null(image
->machine_id
)) /* Add an empty array if the ID is zero */
314 r
= sd_bus_message_append(reply
, "ay", 0);
316 r
= sd_bus_message_append_array(reply
, 'y', image
->machine_id
.bytes
, 16);
320 return sd_bus_send(NULL
, reply
, NULL
);
323 int bus_image_method_get_machine_info(
324 sd_bus_message
*message
,
326 sd_bus_error
*error
) {
328 Image
*image
= userdata
;
331 if (!image
->metadata_valid
) {
332 r
= image_read_metadata(image
);
334 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
337 return bus_reply_pair_array(message
, image
->machine_info
);
340 int bus_image_method_get_os_release(
341 sd_bus_message
*message
,
343 sd_bus_error
*error
) {
345 Image
*image
= userdata
;
348 if (!image
->metadata_valid
) {
349 r
= image_read_metadata(image
);
351 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
354 return bus_reply_pair_array(message
, image
->os_release
);
357 static int image_flush_cache(sd_event_source
*s
, void *userdata
) {
358 Manager
*m
= userdata
;
363 hashmap_clear(m
->image_cache
);
367 static int image_object_find(sd_bus
*bus
, const char *path
, const char *interface
, void *userdata
, void **found
, sd_bus_error
*error
) {
368 _cleanup_free_
char *e
= NULL
;
369 Manager
*m
= userdata
;
379 p
= startswith(path
, "/org/freedesktop/machine1/image/");
383 e
= bus_label_unescape(p
);
387 image
= hashmap_get(m
->image_cache
, e
);
393 r
= hashmap_ensure_allocated(&m
->image_cache
, &image_hash_ops
);
397 if (!m
->image_cache_defer_event
) {
398 r
= sd_event_add_defer(m
->event
, &m
->image_cache_defer_event
, image_flush_cache
, m
);
402 r
= sd_event_source_set_priority(m
->image_cache_defer_event
, SD_EVENT_PRIORITY_IDLE
);
407 r
= sd_event_source_set_enabled(m
->image_cache_defer_event
, SD_EVENT_ONESHOT
);
411 r
= image_find(IMAGE_MACHINE
, e
, &image
);
419 r
= hashmap_put(m
->image_cache
, image
->name
, image
);
429 char *image_bus_path(const char *name
) {
430 _cleanup_free_
char *e
= NULL
;
434 e
= bus_label_escape(name
);
438 return strjoin("/org/freedesktop/machine1/image/", e
);
441 static int image_node_enumerator(sd_bus
*bus
, const char *path
, void *userdata
, char ***nodes
, sd_bus_error
*error
) {
442 _cleanup_hashmap_free_ Hashmap
*images
= NULL
;
443 _cleanup_strv_free_
char **l
= NULL
;
452 images
= hashmap_new(&image_hash_ops
);
456 r
= image_discover(IMAGE_MACHINE
, images
);
460 HASHMAP_FOREACH(image
, images
, i
) {
463 p
= image_bus_path(image
->name
);
467 r
= strv_consume(&l
, p
);
472 *nodes
= TAKE_PTR(l
);
477 const sd_bus_vtable image_vtable
[] = {
478 SD_BUS_VTABLE_START(0),
479 SD_BUS_PROPERTY("Name", "s", NULL
, offsetof(Image
, name
), 0),
480 SD_BUS_PROPERTY("Path", "s", NULL
, offsetof(Image
, path
), 0),
481 SD_BUS_PROPERTY("Type", "s", property_get_type
, offsetof(Image
, type
), 0),
482 SD_BUS_PROPERTY("ReadOnly", "b", bus_property_get_bool
, offsetof(Image
, read_only
), 0),
483 SD_BUS_PROPERTY("CreationTimestamp", "t", NULL
, offsetof(Image
, crtime
), 0),
484 SD_BUS_PROPERTY("ModificationTimestamp", "t", NULL
, offsetof(Image
, mtime
), 0),
485 SD_BUS_PROPERTY("Usage", "t", NULL
, offsetof(Image
, usage
), 0),
486 SD_BUS_PROPERTY("Limit", "t", NULL
, offsetof(Image
, limit
), 0),
487 SD_BUS_PROPERTY("UsageExclusive", "t", NULL
, offsetof(Image
, usage_exclusive
), 0),
488 SD_BUS_PROPERTY("LimitExclusive", "t", NULL
, offsetof(Image
, limit_exclusive
), 0),
489 SD_BUS_METHOD("Remove", NULL
, NULL
, bus_image_method_remove
, SD_BUS_VTABLE_UNPRIVILEGED
),
490 SD_BUS_METHOD("Rename", "s", NULL
, bus_image_method_rename
, SD_BUS_VTABLE_UNPRIVILEGED
),
491 SD_BUS_METHOD("Clone", "sb", NULL
, bus_image_method_clone
, SD_BUS_VTABLE_UNPRIVILEGED
),
492 SD_BUS_METHOD("MarkReadOnly", "b", NULL
, bus_image_method_mark_read_only
, SD_BUS_VTABLE_UNPRIVILEGED
),
493 SD_BUS_METHOD("SetLimit", "t", NULL
, bus_image_method_set_limit
, SD_BUS_VTABLE_UNPRIVILEGED
),
494 SD_BUS_METHOD("GetHostname", NULL
, "s", bus_image_method_get_hostname
, SD_BUS_VTABLE_UNPRIVILEGED
),
495 SD_BUS_METHOD("GetMachineID", NULL
, "ay", bus_image_method_get_machine_id
, SD_BUS_VTABLE_UNPRIVILEGED
),
496 SD_BUS_METHOD("GetMachineInfo", NULL
, "a{ss}", bus_image_method_get_machine_info
, SD_BUS_VTABLE_UNPRIVILEGED
),
497 SD_BUS_METHOD("GetOSRelease", NULL
, "a{ss}", bus_image_method_get_os_release
, SD_BUS_VTABLE_UNPRIVILEGED
),
501 const BusObjectImplementation image_object
= {
502 "/org/freedesktop/machine1/image",
503 "org.freedesktop.machine1.Image",
504 .fallback_vtables
= BUS_FALLBACK_VTABLES({image_vtable
, image_object_find
}),
505 .node_enumerator
= image_node_enumerator
,