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