1 /* SPDX-License-Identifier: LGPL-2.1+ */
6 #include "alloc-util.h"
10 #include "dissect-image.h"
14 #include "image-dbus.h"
16 #include "loop-util.h"
17 #include "machine-image.h"
18 #include "missing_capability.h"
19 #include "mount-util.h"
20 #include "process-util.h"
21 #include "raw-clone.h"
23 #include "user-util.h"
25 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type
, image_type
, ImageType
);
27 int bus_image_method_remove(
28 sd_bus_message
*message
,
30 sd_bus_error
*error
) {
32 _cleanup_close_pair_
int errno_pipe_fd
[2] = { -1, -1 };
33 Image
*image
= userdata
;
34 Manager
*m
= image
->userdata
;
41 if (m
->n_operations
>= OPERATIONS_MAX
)
42 return sd_bus_error_setf(error
, SD_BUS_ERROR_LIMITS_EXCEEDED
, "Too many ongoing operations.");
44 r
= bus_verify_polkit_async(
47 "org.freedesktop.machine1.manage-images",
56 return 1; /* Will call us back */
58 if (pipe2(errno_pipe_fd
, O_CLOEXEC
|O_NONBLOCK
) < 0)
59 return sd_bus_error_set_errnof(error
, errno
, "Failed to create pipe: %m");
61 r
= safe_fork("(sd-imgrm)", FORK_RESET_SIGNALS
, &child
);
63 return sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
65 errno_pipe_fd
[0] = safe_close(errno_pipe_fd
[0]);
67 r
= image_remove(image
);
69 (void) write(errno_pipe_fd
[1], &r
, sizeof(r
));
76 errno_pipe_fd
[1] = safe_close(errno_pipe_fd
[1]);
78 r
= operation_new(m
, NULL
, child
, message
, errno_pipe_fd
[0], NULL
);
80 (void) sigkill_wait(child
);
84 errno_pipe_fd
[0] = -1;
89 int bus_image_method_rename(
90 sd_bus_message
*message
,
92 sd_bus_error
*error
) {
94 Image
*image
= userdata
;
95 Manager
*m
= image
->userdata
;
102 r
= sd_bus_message_read(message
, "s", &new_name
);
106 if (!image_name_is_valid(new_name
))
107 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Image name '%s' is invalid.", new_name
);
109 r
= bus_verify_polkit_async(
112 "org.freedesktop.machine1.manage-images",
121 return 1; /* Will call us back */
123 r
= image_rename(image
, new_name
);
127 return sd_bus_reply_method_return(message
, NULL
);
130 int bus_image_method_clone(
131 sd_bus_message
*message
,
133 sd_bus_error
*error
) {
135 _cleanup_close_pair_
int errno_pipe_fd
[2] = { -1, -1 };
136 Image
*image
= userdata
;
137 Manager
*m
= image
->userdata
;
138 const char *new_name
;
146 if (m
->n_operations
>= OPERATIONS_MAX
)
147 return sd_bus_error_setf(error
, SD_BUS_ERROR_LIMITS_EXCEEDED
, "Too many ongoing operations.");
149 r
= sd_bus_message_read(message
, "sb", &new_name
, &read_only
);
153 if (!image_name_is_valid(new_name
))
154 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Image name '%s' is invalid.", new_name
);
156 r
= bus_verify_polkit_async(
159 "org.freedesktop.machine1.manage-images",
168 return 1; /* Will call us back */
170 if (pipe2(errno_pipe_fd
, O_CLOEXEC
|O_NONBLOCK
) < 0)
171 return sd_bus_error_set_errnof(error
, errno
, "Failed to create pipe: %m");
173 r
= safe_fork("(sd-imgclone)", FORK_RESET_SIGNALS
, &child
);
175 return sd_bus_error_set_errnof(error
, r
, "Failed to fork(): %m");
177 errno_pipe_fd
[0] = safe_close(errno_pipe_fd
[0]);
179 r
= image_clone(image
, new_name
, read_only
);
181 (void) write(errno_pipe_fd
[1], &r
, sizeof(r
));
188 errno_pipe_fd
[1] = safe_close(errno_pipe_fd
[1]);
190 r
= operation_new(m
, NULL
, child
, message
, errno_pipe_fd
[0], NULL
);
192 (void) sigkill_wait(child
);
196 errno_pipe_fd
[0] = -1;
201 int bus_image_method_mark_read_only(
202 sd_bus_message
*message
,
204 sd_bus_error
*error
) {
206 Image
*image
= userdata
;
207 Manager
*m
= image
->userdata
;
212 r
= sd_bus_message_read(message
, "b", &read_only
);
216 r
= bus_verify_polkit_async(
219 "org.freedesktop.machine1.manage-images",
228 return 1; /* Will call us back */
230 r
= image_read_only(image
, read_only
);
234 return sd_bus_reply_method_return(message
, NULL
);
237 int bus_image_method_set_limit(
238 sd_bus_message
*message
,
240 sd_bus_error
*error
) {
242 Image
*image
= userdata
;
243 Manager
*m
= image
->userdata
;
249 r
= sd_bus_message_read(message
, "t", &limit
);
252 if (!FILE_SIZE_VALID_OR_INFINITY(limit
))
253 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "New limit out of range");
255 r
= bus_verify_polkit_async(
258 "org.freedesktop.machine1.manage-images",
267 return 1; /* Will call us back */
269 r
= image_set_limit(image
, limit
);
273 return sd_bus_reply_method_return(message
, NULL
);
276 int bus_image_method_get_hostname(
277 sd_bus_message
*message
,
279 sd_bus_error
*error
) {
281 Image
*image
= userdata
;
284 if (!image
->metadata_valid
) {
285 r
= image_read_metadata(image
);
287 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
290 return sd_bus_reply_method_return(message
, "s", image
->hostname
);
293 int bus_image_method_get_machine_id(
294 sd_bus_message
*message
,
296 sd_bus_error
*error
) {
298 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
299 Image
*image
= userdata
;
302 if (!image
->metadata_valid
) {
303 r
= image_read_metadata(image
);
305 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
308 r
= sd_bus_message_new_method_return(message
, &reply
);
312 if (sd_id128_is_null(image
->machine_id
)) /* Add an empty array if the ID is zero */
313 r
= sd_bus_message_append(reply
, "ay", 0);
315 r
= sd_bus_message_append_array(reply
, 'y', image
->machine_id
.bytes
, 16);
319 return sd_bus_send(NULL
, reply
, NULL
);
322 int bus_image_method_get_machine_info(
323 sd_bus_message
*message
,
325 sd_bus_error
*error
) {
327 Image
*image
= userdata
;
330 if (!image
->metadata_valid
) {
331 r
= image_read_metadata(image
);
333 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
336 return bus_reply_pair_array(message
, image
->machine_info
);
339 int bus_image_method_get_os_release(
340 sd_bus_message
*message
,
342 sd_bus_error
*error
) {
344 Image
*image
= userdata
;
347 if (!image
->metadata_valid
) {
348 r
= image_read_metadata(image
);
350 return sd_bus_error_set_errnof(error
, r
, "Failed to read image metadata: %m");
353 return bus_reply_pair_array(message
, image
->os_release
);
356 const sd_bus_vtable image_vtable
[] = {
357 SD_BUS_VTABLE_START(0),
358 SD_BUS_PROPERTY("Name", "s", NULL
, offsetof(Image
, name
), 0),
359 SD_BUS_PROPERTY("Path", "s", NULL
, offsetof(Image
, path
), 0),
360 SD_BUS_PROPERTY("Type", "s", property_get_type
, offsetof(Image
, type
), 0),
361 SD_BUS_PROPERTY("ReadOnly", "b", bus_property_get_bool
, offsetof(Image
, read_only
), 0),
362 SD_BUS_PROPERTY("CreationTimestamp", "t", NULL
, offsetof(Image
, crtime
), 0),
363 SD_BUS_PROPERTY("ModificationTimestamp", "t", NULL
, offsetof(Image
, mtime
), 0),
364 SD_BUS_PROPERTY("Usage", "t", NULL
, offsetof(Image
, usage
), 0),
365 SD_BUS_PROPERTY("Limit", "t", NULL
, offsetof(Image
, limit
), 0),
366 SD_BUS_PROPERTY("UsageExclusive", "t", NULL
, offsetof(Image
, usage_exclusive
), 0),
367 SD_BUS_PROPERTY("LimitExclusive", "t", NULL
, offsetof(Image
, limit_exclusive
), 0),
368 SD_BUS_METHOD("Remove", NULL
, NULL
, bus_image_method_remove
, SD_BUS_VTABLE_UNPRIVILEGED
),
369 SD_BUS_METHOD("Rename", "s", NULL
, bus_image_method_rename
, SD_BUS_VTABLE_UNPRIVILEGED
),
370 SD_BUS_METHOD("Clone", "sb", NULL
, bus_image_method_clone
, SD_BUS_VTABLE_UNPRIVILEGED
),
371 SD_BUS_METHOD("MarkReadOnly", "b", NULL
, bus_image_method_mark_read_only
, SD_BUS_VTABLE_UNPRIVILEGED
),
372 SD_BUS_METHOD("SetLimit", "t", NULL
, bus_image_method_set_limit
, SD_BUS_VTABLE_UNPRIVILEGED
),
373 SD_BUS_METHOD("GetHostname", NULL
, "s", bus_image_method_get_hostname
, SD_BUS_VTABLE_UNPRIVILEGED
),
374 SD_BUS_METHOD("GetMachineID", NULL
, "ay", bus_image_method_get_machine_id
, SD_BUS_VTABLE_UNPRIVILEGED
),
375 SD_BUS_METHOD("GetMachineInfo", NULL
, "a{ss}", bus_image_method_get_machine_info
, SD_BUS_VTABLE_UNPRIVILEGED
),
376 SD_BUS_METHOD("GetOSRelease", NULL
, "a{ss}", bus_image_method_get_os_release
, SD_BUS_VTABLE_UNPRIVILEGED
),
380 static int image_flush_cache(sd_event_source
*s
, void *userdata
) {
381 Manager
*m
= userdata
;
386 hashmap_clear(m
->image_cache
);
390 int image_object_find(sd_bus
*bus
, const char *path
, const char *interface
, void *userdata
, void **found
, sd_bus_error
*error
) {
391 _cleanup_free_
char *e
= NULL
;
392 Manager
*m
= userdata
;
402 p
= startswith(path
, "/org/freedesktop/machine1/image/");
406 e
= bus_label_unescape(p
);
410 image
= hashmap_get(m
->image_cache
, e
);
416 r
= hashmap_ensure_allocated(&m
->image_cache
, &image_hash_ops
);
420 if (!m
->image_cache_defer_event
) {
421 r
= sd_event_add_defer(m
->event
, &m
->image_cache_defer_event
, image_flush_cache
, m
);
425 r
= sd_event_source_set_priority(m
->image_cache_defer_event
, SD_EVENT_PRIORITY_IDLE
);
430 r
= sd_event_source_set_enabled(m
->image_cache_defer_event
, SD_EVENT_ONESHOT
);
434 r
= image_find(IMAGE_MACHINE
, e
, &image
);
442 r
= hashmap_put(m
->image_cache
, image
->name
, image
);
452 char *image_bus_path(const char *name
) {
453 _cleanup_free_
char *e
= NULL
;
457 e
= bus_label_escape(name
);
461 return strappend("/org/freedesktop/machine1/image/", e
);
464 int image_node_enumerator(sd_bus
*bus
, const char *path
, void *userdata
, char ***nodes
, sd_bus_error
*error
) {
465 _cleanup_hashmap_free_ Hashmap
*images
= NULL
;
466 _cleanup_strv_free_
char **l
= NULL
;
475 images
= hashmap_new(&image_hash_ops
);
479 r
= image_discover(IMAGE_MACHINE
, images
);
483 HASHMAP_FOREACH(image
, images
, i
) {
486 p
= image_bus_path(image
->name
);
490 r
= strv_consume(&l
, p
);
495 *nodes
= TAKE_PTR(l
);