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ebeccf9e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
b5efdb8a | 22 | #include "alloc-util.h" |
ebeccf9e | 23 | #include "bus-label.h" |
1ddb263d | 24 | #include "bus-util.h" |
003dffde | 25 | #include "image-dbus.h" |
ee104e11 LP |
26 | #include "machine-image.h" |
27 | #include "strv.h" | |
28 | #include "user-util.h" | |
ebeccf9e | 29 | |
1ddb263d | 30 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, image_type, ImageType); |
ebeccf9e | 31 | |
1ddb263d | 32 | int bus_image_method_remove( |
08682124 LP |
33 | sd_bus_message *message, |
34 | void *userdata, | |
35 | sd_bus_error *error) { | |
36 | ||
1ddb263d | 37 | Image *image = userdata; |
70244d1d | 38 | Manager *m = image->userdata; |
08682124 LP |
39 | int r; |
40 | ||
08682124 | 41 | assert(message); |
1ddb263d | 42 | assert(image); |
08682124 | 43 | |
70244d1d LP |
44 | r = bus_verify_polkit_async( |
45 | message, | |
46 | CAP_SYS_ADMIN, | |
47 | "org.freedesktop.machine1.manage-images", | |
403ed0e5 | 48 | NULL, |
70244d1d | 49 | false, |
c529695e | 50 | UID_INVALID, |
70244d1d LP |
51 | &m->polkit_registry, |
52 | error); | |
53 | if (r < 0) | |
54 | return r; | |
55 | if (r == 0) | |
56 | return 1; /* Will call us back */ | |
57 | ||
08682124 LP |
58 | r = image_remove(image); |
59 | if (r < 0) | |
60 | return r; | |
61 | ||
62 | return sd_bus_reply_method_return(message, NULL); | |
63 | } | |
64 | ||
1ddb263d | 65 | int bus_image_method_rename( |
ebd93cb6 LP |
66 | sd_bus_message *message, |
67 | void *userdata, | |
68 | sd_bus_error *error) { | |
69 | ||
1ddb263d | 70 | Image *image = userdata; |
70244d1d | 71 | Manager *m = image->userdata; |
ebd93cb6 LP |
72 | const char *new_name; |
73 | int r; | |
74 | ||
ebd93cb6 | 75 | assert(message); |
1ddb263d | 76 | assert(image); |
ebd93cb6 LP |
77 | |
78 | r = sd_bus_message_read(message, "s", &new_name); | |
79 | if (r < 0) | |
80 | return r; | |
81 | ||
82 | if (!image_name_is_valid(new_name)) | |
83 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", new_name); | |
84 | ||
70244d1d LP |
85 | r = bus_verify_polkit_async( |
86 | message, | |
87 | CAP_SYS_ADMIN, | |
88 | "org.freedesktop.machine1.manage-images", | |
403ed0e5 | 89 | NULL, |
70244d1d | 90 | false, |
c529695e | 91 | UID_INVALID, |
70244d1d LP |
92 | &m->polkit_registry, |
93 | error); | |
94 | if (r < 0) | |
95 | return r; | |
96 | if (r == 0) | |
97 | return 1; /* Will call us back */ | |
98 | ||
ebd93cb6 LP |
99 | r = image_rename(image, new_name); |
100 | if (r < 0) | |
101 | return r; | |
102 | ||
103 | return sd_bus_reply_method_return(message, NULL); | |
104 | } | |
105 | ||
1ddb263d | 106 | int bus_image_method_clone( |
ebd93cb6 LP |
107 | sd_bus_message *message, |
108 | void *userdata, | |
109 | sd_bus_error *error) { | |
110 | ||
1ddb263d | 111 | Image *image = userdata; |
70244d1d | 112 | Manager *m = image->userdata; |
ebd93cb6 LP |
113 | const char *new_name; |
114 | int r, read_only; | |
115 | ||
ebd93cb6 | 116 | assert(message); |
1ddb263d | 117 | assert(image); |
ebd93cb6 LP |
118 | |
119 | r = sd_bus_message_read(message, "sb", &new_name, &read_only); | |
120 | if (r < 0) | |
121 | return r; | |
122 | ||
123 | if (!image_name_is_valid(new_name)) | |
124 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image name '%s' is invalid.", new_name); | |
125 | ||
70244d1d LP |
126 | r = bus_verify_polkit_async( |
127 | message, | |
128 | CAP_SYS_ADMIN, | |
129 | "org.freedesktop.machine1.manage-images", | |
403ed0e5 | 130 | NULL, |
70244d1d | 131 | false, |
c529695e | 132 | UID_INVALID, |
70244d1d LP |
133 | &m->polkit_registry, |
134 | error); | |
135 | if (r < 0) | |
136 | return r; | |
137 | if (r == 0) | |
138 | return 1; /* Will call us back */ | |
139 | ||
ebd93cb6 LP |
140 | r = image_clone(image, new_name, read_only); |
141 | if (r < 0) | |
142 | return r; | |
143 | ||
144 | return sd_bus_reply_method_return(message, NULL); | |
145 | } | |
146 | ||
1ddb263d | 147 | int bus_image_method_mark_read_only( |
ebd93cb6 LP |
148 | sd_bus_message *message, |
149 | void *userdata, | |
150 | sd_bus_error *error) { | |
151 | ||
1ddb263d | 152 | Image *image = userdata; |
70244d1d | 153 | Manager *m = image->userdata; |
ebd93cb6 LP |
154 | int r, read_only; |
155 | ||
ebd93cb6 LP |
156 | assert(message); |
157 | ||
ebd93cb6 LP |
158 | r = sd_bus_message_read(message, "b", &read_only); |
159 | if (r < 0) | |
160 | return r; | |
161 | ||
70244d1d LP |
162 | r = bus_verify_polkit_async( |
163 | message, | |
164 | CAP_SYS_ADMIN, | |
165 | "org.freedesktop.machine1.manage-images", | |
403ed0e5 | 166 | NULL, |
70244d1d | 167 | false, |
c529695e | 168 | UID_INVALID, |
70244d1d LP |
169 | &m->polkit_registry, |
170 | error); | |
171 | if (r < 0) | |
172 | return r; | |
173 | if (r == 0) | |
174 | return 1; /* Will call us back */ | |
175 | ||
ebd93cb6 LP |
176 | r = image_read_only(image, read_only); |
177 | if (r < 0) | |
178 | return r; | |
179 | ||
180 | return sd_bus_reply_method_return(message, NULL); | |
181 | } | |
182 | ||
d6ce17c7 | 183 | int bus_image_method_set_limit( |
d6ce17c7 LP |
184 | sd_bus_message *message, |
185 | void *userdata, | |
186 | sd_bus_error *error) { | |
187 | ||
188 | Image *image = userdata; | |
189 | Manager *m = image->userdata; | |
190 | uint64_t limit; | |
191 | int r; | |
192 | ||
d6ce17c7 LP |
193 | assert(message); |
194 | ||
195 | r = sd_bus_message_read(message, "t", &limit); | |
196 | if (r < 0) | |
197 | return r; | |
198 | ||
199 | r = bus_verify_polkit_async( | |
200 | message, | |
201 | CAP_SYS_ADMIN, | |
202 | "org.freedesktop.machine1.manage-images", | |
403ed0e5 | 203 | NULL, |
d6ce17c7 LP |
204 | false, |
205 | UID_INVALID, | |
206 | &m->polkit_registry, | |
207 | error); | |
208 | if (r < 0) | |
209 | return r; | |
210 | if (r == 0) | |
211 | return 1; /* Will call us back */ | |
212 | ||
213 | r = image_set_limit(image, limit); | |
214 | if (r < 0) | |
215 | return r; | |
216 | ||
217 | return sd_bus_reply_method_return(message, NULL); | |
218 | } | |
219 | ||
ebeccf9e LP |
220 | const sd_bus_vtable image_vtable[] = { |
221 | SD_BUS_VTABLE_START(0), | |
1ddb263d LP |
222 | SD_BUS_PROPERTY("Name", "s", NULL, offsetof(Image, name), 0), |
223 | SD_BUS_PROPERTY("Path", "s", NULL, offsetof(Image, path), 0), | |
224 | SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Image, type), 0), | |
225 | SD_BUS_PROPERTY("ReadOnly", "b", bus_property_get_bool, offsetof(Image, read_only), 0), | |
226 | SD_BUS_PROPERTY("CreationTimestamp", "t", NULL, offsetof(Image, crtime), 0), | |
227 | SD_BUS_PROPERTY("ModificationTimestamp", "t", NULL, offsetof(Image, mtime), 0), | |
c19de711 | 228 | SD_BUS_PROPERTY("Usage", "t", NULL, offsetof(Image, usage), 0), |
1ddb263d | 229 | SD_BUS_PROPERTY("Limit", "t", NULL, offsetof(Image, limit), 0), |
c19de711 | 230 | SD_BUS_PROPERTY("UsageExclusive", "t", NULL, offsetof(Image, usage_exclusive), 0), |
1ddb263d | 231 | SD_BUS_PROPERTY("LimitExclusive", "t", NULL, offsetof(Image, limit_exclusive), 0), |
70244d1d LP |
232 | SD_BUS_METHOD("Remove", NULL, NULL, bus_image_method_remove, SD_BUS_VTABLE_UNPRIVILEGED), |
233 | SD_BUS_METHOD("Rename", "s", NULL, bus_image_method_rename, SD_BUS_VTABLE_UNPRIVILEGED), | |
234 | SD_BUS_METHOD("Clone", "sb", NULL, bus_image_method_clone, SD_BUS_VTABLE_UNPRIVILEGED), | |
235 | SD_BUS_METHOD("MarkReadOnly", "b", NULL, bus_image_method_mark_read_only, SD_BUS_VTABLE_UNPRIVILEGED), | |
d6ce17c7 | 236 | SD_BUS_METHOD("SetLimit", "t", NULL, bus_image_method_set_limit, SD_BUS_VTABLE_UNPRIVILEGED), |
ebeccf9e LP |
237 | SD_BUS_VTABLE_END |
238 | }; | |
239 | ||
1ddb263d LP |
240 | static int image_flush_cache(sd_event_source *s, void *userdata) { |
241 | Manager *m = userdata; | |
242 | Image *i; | |
243 | ||
244 | assert(s); | |
245 | assert(m); | |
246 | ||
247 | while ((i = hashmap_steal_first(m->image_cache))) | |
248 | image_unref(i); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
ebeccf9e | 253 | int image_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { |
1ddb263d LP |
254 | _cleanup_free_ char *e = NULL; |
255 | Manager *m = userdata; | |
256 | Image *image = NULL; | |
257 | const char *p; | |
ebeccf9e LP |
258 | int r; |
259 | ||
260 | assert(bus); | |
261 | assert(path); | |
262 | assert(interface); | |
263 | assert(found); | |
264 | ||
1ddb263d LP |
265 | p = startswith(path, "/org/freedesktop/machine1/image/"); |
266 | if (!p) | |
267 | return 0; | |
268 | ||
269 | e = bus_label_unescape(p); | |
270 | if (!e) | |
271 | return -ENOMEM; | |
272 | ||
273 | image = hashmap_get(m->image_cache, e); | |
274 | if (image) { | |
275 | *found = image; | |
276 | return 1; | |
277 | } | |
278 | ||
279 | r = hashmap_ensure_allocated(&m->image_cache, &string_hash_ops); | |
280 | if (r < 0) | |
281 | return r; | |
282 | ||
283 | if (!m->image_cache_defer_event) { | |
284 | r = sd_event_add_defer(m->event, &m->image_cache_defer_event, image_flush_cache, m); | |
285 | if (r < 0) | |
286 | return r; | |
287 | ||
288 | r = sd_event_source_set_priority(m->image_cache_defer_event, SD_EVENT_PRIORITY_IDLE); | |
289 | if (r < 0) | |
290 | return r; | |
291 | } | |
292 | ||
293 | r = sd_event_source_set_enabled(m->image_cache_defer_event, SD_EVENT_ONESHOT); | |
294 | if (r < 0) | |
295 | return r; | |
296 | ||
297 | r = image_find(e, &image); | |
ebeccf9e LP |
298 | if (r <= 0) |
299 | return r; | |
300 | ||
70244d1d LP |
301 | image->userdata = m; |
302 | ||
1ddb263d LP |
303 | r = hashmap_put(m->image_cache, image->name, image); |
304 | if (r < 0) { | |
305 | image_unref(image); | |
306 | return r; | |
307 | } | |
308 | ||
309 | *found = image; | |
ebeccf9e LP |
310 | return 1; |
311 | } | |
312 | ||
313 | char *image_bus_path(const char *name) { | |
314 | _cleanup_free_ char *e = NULL; | |
315 | ||
316 | assert(name); | |
317 | ||
318 | e = bus_label_escape(name); | |
319 | if (!e) | |
320 | return NULL; | |
321 | ||
322 | return strappend("/org/freedesktop/machine1/image/", e); | |
323 | } | |
324 | ||
325 | int image_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { | |
326 | _cleanup_(image_hashmap_freep) Hashmap *images = NULL; | |
327 | _cleanup_strv_free_ char **l = NULL; | |
328 | Image *image; | |
329 | Iterator i; | |
330 | int r; | |
331 | ||
332 | assert(bus); | |
333 | assert(path); | |
334 | assert(nodes); | |
335 | ||
336 | images = hashmap_new(&string_hash_ops); | |
337 | if (!images) | |
338 | return -ENOMEM; | |
339 | ||
340 | r = image_discover(images); | |
341 | if (r < 0) | |
342 | return r; | |
343 | ||
344 | HASHMAP_FOREACH(image, images, i) { | |
345 | char *p; | |
346 | ||
347 | p = image_bus_path(image->name); | |
348 | if (!p) | |
349 | return -ENOMEM; | |
350 | ||
351 | r = strv_consume(&l, p); | |
352 | if (r < 0) | |
353 | return r; | |
354 | } | |
355 | ||
356 | *nodes = l; | |
357 | l = NULL; | |
358 | ||
359 | return 1; | |
360 | } |