1 | /* |
2 | * qdev property parsing |
3 | * (parts specific for qemu-system-*) |
4 | * |
5 | * This file is based on code from hw/qdev-properties.c from |
6 | * commit 074a86fccd185616469dfcdc0e157f438aebba18, |
7 | * Copyright (c) Gerd Hoffmann <kraxel@redhat.com> and other contributors. |
8 | * |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
10 | * See the COPYING file in the top-level directory. |
11 | */ |
12 | |
13 | #include "qemu/osdep.h" |
14 | #include "audio/audio.h" |
15 | #include "net/net.h" |
16 | #include "hw/qdev-properties.h" |
17 | #include "qapi/error.h" |
18 | #include "qapi/qmp/qerror.h" |
19 | #include "sysemu/block-backend.h" |
20 | #include "sysemu/blockdev.h" |
21 | #include "hw/block/block.h" |
22 | #include "net/hub.h" |
23 | #include "qapi/visitor.h" |
24 | #include "chardev/char-fe.h" |
25 | #include "sysemu/iothread.h" |
26 | #include "sysemu/tpm_backend.h" |
27 | |
28 | static void get_pointer(Object *obj, Visitor *v, Property *prop, |
29 | char *(*print)(void *ptr), |
30 | const char *name, Error **errp) |
31 | { |
32 | DeviceState *dev = DEVICE(obj); |
33 | void **ptr = qdev_get_prop_ptr(dev, prop); |
34 | char *p; |
35 | |
36 | p = *ptr ? print(*ptr) : g_strdup("" ); |
37 | visit_type_str(v, name, &p, errp); |
38 | g_free(p); |
39 | } |
40 | |
41 | static void set_pointer(Object *obj, Visitor *v, Property *prop, |
42 | void (*parse)(DeviceState *dev, const char *str, |
43 | void **ptr, const char *propname, |
44 | Error **errp), |
45 | const char *name, Error **errp) |
46 | { |
47 | DeviceState *dev = DEVICE(obj); |
48 | Error *local_err = NULL; |
49 | void **ptr = qdev_get_prop_ptr(dev, prop); |
50 | char *str; |
51 | |
52 | if (dev->realized) { |
53 | qdev_prop_set_after_realize(dev, name, errp); |
54 | return; |
55 | } |
56 | |
57 | visit_type_str(v, name, &str, &local_err); |
58 | if (local_err) { |
59 | error_propagate(errp, local_err); |
60 | return; |
61 | } |
62 | if (!*str) { |
63 | g_free(str); |
64 | *ptr = NULL; |
65 | return; |
66 | } |
67 | parse(dev, str, ptr, prop->name, errp); |
68 | g_free(str); |
69 | } |
70 | |
71 | /* --- drive --- */ |
72 | |
73 | static void do_parse_drive(DeviceState *dev, const char *str, void **ptr, |
74 | const char *propname, bool iothread, Error **errp) |
75 | { |
76 | BlockBackend *blk; |
77 | bool blk_created = false; |
78 | int ret; |
79 | |
80 | blk = blk_by_name(str); |
81 | if (!blk) { |
82 | BlockDriverState *bs = bdrv_lookup_bs(NULL, str, NULL); |
83 | if (bs) { |
84 | /* |
85 | * If the device supports iothreads, it will make sure to move the |
86 | * block node to the right AioContext if necessary (or fail if this |
87 | * isn't possible because of other users). Devices that are not |
88 | * aware of iothreads require their BlockBackends to be in the main |
89 | * AioContext. |
90 | */ |
91 | AioContext *ctx = iothread ? bdrv_get_aio_context(bs) : |
92 | qemu_get_aio_context(); |
93 | blk = blk_new(ctx, 0, BLK_PERM_ALL); |
94 | blk_created = true; |
95 | |
96 | ret = blk_insert_bs(blk, bs, errp); |
97 | if (ret < 0) { |
98 | goto fail; |
99 | } |
100 | } |
101 | } |
102 | if (!blk) { |
103 | error_setg(errp, "Property '%s.%s' can't find value '%s'" , |
104 | object_get_typename(OBJECT(dev)), propname, str); |
105 | goto fail; |
106 | } |
107 | if (blk_attach_dev(blk, dev) < 0) { |
108 | DriveInfo *dinfo = blk_legacy_dinfo(blk); |
109 | |
110 | if (dinfo && dinfo->type != IF_NONE) { |
111 | error_setg(errp, "Drive '%s' is already in use because " |
112 | "it has been automatically connected to another " |
113 | "device (did you need 'if=none' in the drive options?)" , |
114 | str); |
115 | } else { |
116 | error_setg(errp, "Drive '%s' is already in use by another device" , |
117 | str); |
118 | } |
119 | goto fail; |
120 | } |
121 | |
122 | *ptr = blk; |
123 | |
124 | fail: |
125 | if (blk_created) { |
126 | /* If we need to keep a reference, blk_attach_dev() took it */ |
127 | blk_unref(blk); |
128 | } |
129 | } |
130 | |
131 | static void parse_drive(DeviceState *dev, const char *str, void **ptr, |
132 | const char *propname, Error **errp) |
133 | { |
134 | do_parse_drive(dev, str, ptr, propname, false, errp); |
135 | } |
136 | |
137 | static void parse_drive_iothread(DeviceState *dev, const char *str, void **ptr, |
138 | const char *propname, Error **errp) |
139 | { |
140 | do_parse_drive(dev, str, ptr, propname, true, errp); |
141 | } |
142 | |
143 | static void release_drive(Object *obj, const char *name, void *opaque) |
144 | { |
145 | DeviceState *dev = DEVICE(obj); |
146 | Property *prop = opaque; |
147 | BlockBackend **ptr = qdev_get_prop_ptr(dev, prop); |
148 | |
149 | if (*ptr) { |
150 | AioContext *ctx = blk_get_aio_context(*ptr); |
151 | |
152 | aio_context_acquire(ctx); |
153 | blockdev_auto_del(*ptr); |
154 | blk_detach_dev(*ptr, dev); |
155 | aio_context_release(ctx); |
156 | } |
157 | } |
158 | |
159 | static char *print_drive(void *ptr) |
160 | { |
161 | const char *name; |
162 | |
163 | name = blk_name(ptr); |
164 | if (!*name) { |
165 | BlockDriverState *bs = blk_bs(ptr); |
166 | if (bs) { |
167 | name = bdrv_get_node_name(bs); |
168 | } |
169 | } |
170 | return g_strdup(name); |
171 | } |
172 | |
173 | static void get_drive(Object *obj, Visitor *v, const char *name, void *opaque, |
174 | Error **errp) |
175 | { |
176 | get_pointer(obj, v, opaque, print_drive, name, errp); |
177 | } |
178 | |
179 | static void set_drive(Object *obj, Visitor *v, const char *name, void *opaque, |
180 | Error **errp) |
181 | { |
182 | set_pointer(obj, v, opaque, parse_drive, name, errp); |
183 | } |
184 | |
185 | static void set_drive_iothread(Object *obj, Visitor *v, const char *name, |
186 | void *opaque, Error **errp) |
187 | { |
188 | set_pointer(obj, v, opaque, parse_drive_iothread, name, errp); |
189 | } |
190 | |
191 | const PropertyInfo qdev_prop_drive = { |
192 | .name = "str" , |
193 | .description = "Node name or ID of a block device to use as a backend" , |
194 | .get = get_drive, |
195 | .set = set_drive, |
196 | .release = release_drive, |
197 | }; |
198 | |
199 | const PropertyInfo qdev_prop_drive_iothread = { |
200 | .name = "str" , |
201 | .description = "Node name or ID of a block device to use as a backend" , |
202 | .get = get_drive, |
203 | .set = set_drive_iothread, |
204 | .release = release_drive, |
205 | }; |
206 | |
207 | /* --- character device --- */ |
208 | |
209 | static void get_chr(Object *obj, Visitor *v, const char *name, void *opaque, |
210 | Error **errp) |
211 | { |
212 | DeviceState *dev = DEVICE(obj); |
213 | CharBackend *be = qdev_get_prop_ptr(dev, opaque); |
214 | char *p; |
215 | |
216 | p = g_strdup(be->chr && be->chr->label ? be->chr->label : "" ); |
217 | visit_type_str(v, name, &p, errp); |
218 | g_free(p); |
219 | } |
220 | |
221 | static void set_chr(Object *obj, Visitor *v, const char *name, void *opaque, |
222 | Error **errp) |
223 | { |
224 | DeviceState *dev = DEVICE(obj); |
225 | Error *local_err = NULL; |
226 | Property *prop = opaque; |
227 | CharBackend *be = qdev_get_prop_ptr(dev, prop); |
228 | Chardev *s; |
229 | char *str; |
230 | |
231 | if (dev->realized) { |
232 | qdev_prop_set_after_realize(dev, name, errp); |
233 | return; |
234 | } |
235 | |
236 | visit_type_str(v, name, &str, &local_err); |
237 | if (local_err) { |
238 | error_propagate(errp, local_err); |
239 | return; |
240 | } |
241 | |
242 | if (!*str) { |
243 | g_free(str); |
244 | be->chr = NULL; |
245 | return; |
246 | } |
247 | |
248 | s = qemu_chr_find(str); |
249 | if (s == NULL) { |
250 | error_setg(errp, "Property '%s.%s' can't find value '%s'" , |
251 | object_get_typename(obj), prop->name, str); |
252 | } else if (!qemu_chr_fe_init(be, s, errp)) { |
253 | error_prepend(errp, "Property '%s.%s' can't take value '%s': " , |
254 | object_get_typename(obj), prop->name, str); |
255 | } |
256 | g_free(str); |
257 | } |
258 | |
259 | static void release_chr(Object *obj, const char *name, void *opaque) |
260 | { |
261 | DeviceState *dev = DEVICE(obj); |
262 | Property *prop = opaque; |
263 | CharBackend *be = qdev_get_prop_ptr(dev, prop); |
264 | |
265 | qemu_chr_fe_deinit(be, false); |
266 | } |
267 | |
268 | const PropertyInfo qdev_prop_chr = { |
269 | .name = "str" , |
270 | .description = "ID of a chardev to use as a backend" , |
271 | .get = get_chr, |
272 | .set = set_chr, |
273 | .release = release_chr, |
274 | }; |
275 | |
276 | /* --- netdev device --- */ |
277 | static void get_netdev(Object *obj, Visitor *v, const char *name, |
278 | void *opaque, Error **errp) |
279 | { |
280 | DeviceState *dev = DEVICE(obj); |
281 | Property *prop = opaque; |
282 | NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop); |
283 | char *p = g_strdup(peers_ptr->ncs[0] ? peers_ptr->ncs[0]->name : "" ); |
284 | |
285 | visit_type_str(v, name, &p, errp); |
286 | g_free(p); |
287 | } |
288 | |
289 | static void set_netdev(Object *obj, Visitor *v, const char *name, |
290 | void *opaque, Error **errp) |
291 | { |
292 | DeviceState *dev = DEVICE(obj); |
293 | Property *prop = opaque; |
294 | NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop); |
295 | NetClientState **ncs = peers_ptr->ncs; |
296 | NetClientState *peers[MAX_QUEUE_NUM]; |
297 | Error *local_err = NULL; |
298 | int queues, err = 0, i = 0; |
299 | char *str; |
300 | |
301 | if (dev->realized) { |
302 | qdev_prop_set_after_realize(dev, name, errp); |
303 | return; |
304 | } |
305 | |
306 | visit_type_str(v, name, &str, &local_err); |
307 | if (local_err) { |
308 | error_propagate(errp, local_err); |
309 | return; |
310 | } |
311 | |
312 | queues = qemu_find_net_clients_except(str, peers, |
313 | NET_CLIENT_DRIVER_NIC, |
314 | MAX_QUEUE_NUM); |
315 | if (queues == 0) { |
316 | err = -ENOENT; |
317 | goto out; |
318 | } |
319 | |
320 | if (queues > MAX_QUEUE_NUM) { |
321 | error_setg(errp, "queues of backend '%s'(%d) exceeds QEMU limitation(%d)" , |
322 | str, queues, MAX_QUEUE_NUM); |
323 | goto out; |
324 | } |
325 | |
326 | for (i = 0; i < queues; i++) { |
327 | |
328 | if (peers[i]->peer) { |
329 | err = -EEXIST; |
330 | goto out; |
331 | } |
332 | |
333 | if (ncs[i]) { |
334 | err = -EINVAL; |
335 | goto out; |
336 | } |
337 | |
338 | ncs[i] = peers[i]; |
339 | ncs[i]->queue_index = i; |
340 | } |
341 | |
342 | peers_ptr->queues = queues; |
343 | |
344 | out: |
345 | error_set_from_qdev_prop_error(errp, err, dev, prop, str); |
346 | g_free(str); |
347 | } |
348 | |
349 | const PropertyInfo qdev_prop_netdev = { |
350 | .name = "str" , |
351 | .description = "ID of a netdev to use as a backend" , |
352 | .get = get_netdev, |
353 | .set = set_netdev, |
354 | }; |
355 | |
356 | |
357 | /* --- audiodev --- */ |
358 | static void get_audiodev(Object *obj, Visitor *v, const char* name, |
359 | void *opaque, Error **errp) |
360 | { |
361 | DeviceState *dev = DEVICE(obj); |
362 | Property *prop = opaque; |
363 | QEMUSoundCard *card = qdev_get_prop_ptr(dev, prop); |
364 | char *p = g_strdup(audio_get_id(card)); |
365 | |
366 | visit_type_str(v, name, &p, errp); |
367 | g_free(p); |
368 | } |
369 | |
370 | static void set_audiodev(Object *obj, Visitor *v, const char* name, |
371 | void *opaque, Error **errp) |
372 | { |
373 | DeviceState *dev = DEVICE(obj); |
374 | Property *prop = opaque; |
375 | QEMUSoundCard *card = qdev_get_prop_ptr(dev, prop); |
376 | AudioState *state; |
377 | Error *local_err = NULL; |
378 | int err = 0; |
379 | char *str; |
380 | |
381 | if (dev->realized) { |
382 | qdev_prop_set_after_realize(dev, name, errp); |
383 | return; |
384 | } |
385 | |
386 | visit_type_str(v, name, &str, &local_err); |
387 | if (local_err) { |
388 | error_propagate(errp, local_err); |
389 | return; |
390 | } |
391 | |
392 | state = audio_state_by_name(str); |
393 | |
394 | if (!state) { |
395 | err = -ENOENT; |
396 | goto out; |
397 | } |
398 | card->state = state; |
399 | |
400 | out: |
401 | error_set_from_qdev_prop_error(errp, err, dev, prop, str); |
402 | g_free(str); |
403 | } |
404 | |
405 | const PropertyInfo qdev_prop_audiodev = { |
406 | .name = "str" , |
407 | .description = "ID of an audiodev to use as a backend" , |
408 | /* release done on shutdown */ |
409 | .get = get_audiodev, |
410 | .set = set_audiodev, |
411 | }; |
412 | |
413 | void qdev_prop_set_drive(DeviceState *dev, const char *name, |
414 | BlockBackend *value, Error **errp) |
415 | { |
416 | const char *ref = "" ; |
417 | |
418 | if (value) { |
419 | ref = blk_name(value); |
420 | if (!*ref) { |
421 | const BlockDriverState *bs = blk_bs(value); |
422 | if (bs) { |
423 | ref = bdrv_get_node_name(bs); |
424 | } |
425 | } |
426 | } |
427 | |
428 | object_property_set_str(OBJECT(dev), ref, name, errp); |
429 | } |
430 | |
431 | void qdev_prop_set_chr(DeviceState *dev, const char *name, |
432 | Chardev *value) |
433 | { |
434 | assert(!value || value->label); |
435 | object_property_set_str(OBJECT(dev), |
436 | value ? value->label : "" , name, &error_abort); |
437 | } |
438 | |
439 | void qdev_prop_set_netdev(DeviceState *dev, const char *name, |
440 | NetClientState *value) |
441 | { |
442 | assert(!value || value->name); |
443 | object_property_set_str(OBJECT(dev), |
444 | value ? value->name : "" , name, &error_abort); |
445 | } |
446 | |
447 | void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd) |
448 | { |
449 | qdev_prop_set_macaddr(dev, "mac" , nd->macaddr.a); |
450 | if (nd->netdev) { |
451 | qdev_prop_set_netdev(dev, "netdev" , nd->netdev); |
452 | } |
453 | if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED && |
454 | object_property_find(OBJECT(dev), "vectors" , NULL)) { |
455 | qdev_prop_set_uint32(dev, "vectors" , nd->nvectors); |
456 | } |
457 | nd->instantiated = 1; |
458 | } |
459 | |