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1 | /* | |
2 | * Dynamic device configuration and creation. | |
3 | * | |
4 | * Copyright (c) 2009 CodeSourcery | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "qemu/osdep.h" | |
21 | #include "hw/sysbus.h" | |
22 | #include "monitor/hmp.h" | |
23 | #include "monitor/monitor.h" | |
24 | #include "monitor/qdev.h" | |
25 | #include "sysemu/arch_init.h" | |
26 | #include "qapi/error.h" | |
27 | #include "qapi/qapi-commands-qdev.h" | |
28 | #include "qapi/qmp/qdict.h" | |
29 | #include "qapi/qmp/qerror.h" | |
30 | #include "qemu/config-file.h" | |
31 | #include "qemu/error-report.h" | |
32 | #include "qemu/help_option.h" | |
33 | #include "qemu/option.h" | |
34 | #include "qemu/qemu-print.h" | |
35 | #include "qemu/option_int.h" | |
36 | #include "sysemu/block-backend.h" | |
37 | #include "sysemu/sysemu.h" | |
38 | #include "migration/misc.h" | |
39 | #include "migration/migration.h" | |
40 | ||
41 | /* | |
42 | * Aliases were a bad idea from the start. Let's keep them | |
43 | * from spreading further. | |
44 | */ | |
45 | typedef struct QDevAlias | |
46 | { | |
47 | const char *typename; | |
48 | const char *alias; | |
49 | uint32_t arch_mask; | |
50 | } QDevAlias; | |
51 | ||
52 | /* Please keep this table sorted by typename. */ | |
53 | static const QDevAlias qdev_alias_table[] = { | |
54 | { "e1000", "e1000-82540em" }, | |
55 | { "ich9-ahci", "ahci" }, | |
56 | { "lsi53c895a", "lsi" }, | |
57 | { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X }, | |
58 | { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
59 | { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X }, | |
60 | { "virtio-balloon-pci", "virtio-balloon", | |
61 | QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
62 | { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X }, | |
63 | { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
64 | { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X }, | |
65 | { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
66 | { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X }, | |
67 | { "virtio-input-host-pci", "virtio-input-host", | |
68 | QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
69 | { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X }, | |
70 | { "virtio-keyboard-pci", "virtio-keyboard", | |
71 | QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
72 | { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X }, | |
73 | { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
74 | { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X }, | |
75 | { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
76 | { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X }, | |
77 | { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
78 | { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X }, | |
79 | { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
80 | { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X }, | |
81 | { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
82 | { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X }, | |
83 | { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X }, | |
84 | { } | |
85 | }; | |
86 | ||
87 | static const char *qdev_class_get_alias(DeviceClass *dc) | |
88 | { | |
89 | const char *typename = object_class_get_name(OBJECT_CLASS(dc)); | |
90 | int i; | |
91 | ||
92 | for (i = 0; qdev_alias_table[i].typename; i++) { | |
93 | if (qdev_alias_table[i].arch_mask && | |
94 | !(qdev_alias_table[i].arch_mask & arch_type)) { | |
95 | continue; | |
96 | } | |
97 | ||
98 | if (strcmp(qdev_alias_table[i].typename, typename) == 0) { | |
99 | return qdev_alias_table[i].alias; | |
100 | } | |
101 | } | |
102 | ||
103 | return NULL; | |
104 | } | |
105 | ||
106 | static bool qdev_class_has_alias(DeviceClass *dc) | |
107 | { | |
108 | return (qdev_class_get_alias(dc) != NULL); | |
109 | } | |
110 | ||
111 | static void qdev_print_devinfo(DeviceClass *dc) | |
112 | { | |
113 | qemu_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc))); | |
114 | if (dc->bus_type) { | |
115 | qemu_printf(", bus %s", dc->bus_type); | |
116 | } | |
117 | if (qdev_class_has_alias(dc)) { | |
118 | qemu_printf(", alias \"%s\"", qdev_class_get_alias(dc)); | |
119 | } | |
120 | if (dc->desc) { | |
121 | qemu_printf(", desc \"%s\"", dc->desc); | |
122 | } | |
123 | if (!dc->user_creatable) { | |
124 | qemu_printf(", no-user"); | |
125 | } | |
126 | qemu_printf("\n"); | |
127 | } | |
128 | ||
129 | static void qdev_print_devinfos(bool show_no_user) | |
130 | { | |
131 | static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = { | |
132 | [DEVICE_CATEGORY_BRIDGE] = "Controller/Bridge/Hub", | |
133 | [DEVICE_CATEGORY_USB] = "USB", | |
134 | [DEVICE_CATEGORY_STORAGE] = "Storage", | |
135 | [DEVICE_CATEGORY_NETWORK] = "Network", | |
136 | [DEVICE_CATEGORY_INPUT] = "Input", | |
137 | [DEVICE_CATEGORY_DISPLAY] = "Display", | |
138 | [DEVICE_CATEGORY_SOUND] = "Sound", | |
139 | [DEVICE_CATEGORY_MISC] = "Misc", | |
140 | [DEVICE_CATEGORY_CPU] = "CPU", | |
141 | [DEVICE_CATEGORY_MAX] = "Uncategorized", | |
142 | }; | |
143 | GSList *list, *elt; | |
144 | int i; | |
145 | bool cat_printed; | |
146 | ||
147 | list = object_class_get_list_sorted(TYPE_DEVICE, false); | |
148 | ||
149 | for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) { | |
150 | cat_printed = false; | |
151 | for (elt = list; elt; elt = elt->next) { | |
152 | DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data, | |
153 | TYPE_DEVICE); | |
154 | if ((i < DEVICE_CATEGORY_MAX | |
155 | ? !test_bit(i, dc->categories) | |
156 | : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX)) | |
157 | || (!show_no_user | |
158 | && !dc->user_creatable)) { | |
159 | continue; | |
160 | } | |
161 | if (!cat_printed) { | |
162 | qemu_printf("%s%s devices:\n", i ? "\n" : "", cat_name[i]); | |
163 | cat_printed = true; | |
164 | } | |
165 | qdev_print_devinfo(dc); | |
166 | } | |
167 | } | |
168 | ||
169 | g_slist_free(list); | |
170 | } | |
171 | ||
172 | static int set_property(void *opaque, const char *name, const char *value, | |
173 | Error **errp) | |
174 | { | |
175 | Object *obj = opaque; | |
176 | Error *err = NULL; | |
177 | ||
178 | if (strcmp(name, "driver") == 0) | |
179 | return 0; | |
180 | if (strcmp(name, "bus") == 0) | |
181 | return 0; | |
182 | ||
183 | object_property_parse(obj, value, name, &err); | |
184 | if (err != NULL) { | |
185 | error_propagate(errp, err); | |
186 | return -1; | |
187 | } | |
188 | return 0; | |
189 | } | |
190 | ||
191 | static const char *find_typename_by_alias(const char *alias) | |
192 | { | |
193 | int i; | |
194 | ||
195 | for (i = 0; qdev_alias_table[i].alias; i++) { | |
196 | if (qdev_alias_table[i].arch_mask && | |
197 | !(qdev_alias_table[i].arch_mask & arch_type)) { | |
198 | continue; | |
199 | } | |
200 | ||
201 | if (strcmp(qdev_alias_table[i].alias, alias) == 0) { | |
202 | return qdev_alias_table[i].typename; | |
203 | } | |
204 | } | |
205 | ||
206 | return NULL; | |
207 | } | |
208 | ||
209 | static DeviceClass *qdev_get_device_class(const char **driver, Error **errp) | |
210 | { | |
211 | ObjectClass *oc; | |
212 | DeviceClass *dc; | |
213 | const char *original_name = *driver; | |
214 | ||
215 | oc = object_class_by_name(*driver); | |
216 | if (!oc) { | |
217 | const char *typename = find_typename_by_alias(*driver); | |
218 | ||
219 | if (typename) { | |
220 | *driver = typename; | |
221 | oc = object_class_by_name(*driver); | |
222 | } | |
223 | } | |
224 | ||
225 | if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) { | |
226 | if (*driver != original_name) { | |
227 | error_setg(errp, "'%s' (alias '%s') is not a valid device model" | |
228 | " name", original_name, *driver); | |
229 | } else { | |
230 | error_setg(errp, "'%s' is not a valid device model name", *driver); | |
231 | } | |
232 | return NULL; | |
233 | } | |
234 | ||
235 | if (object_class_is_abstract(oc)) { | |
236 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver", | |
237 | "non-abstract device type"); | |
238 | return NULL; | |
239 | } | |
240 | ||
241 | dc = DEVICE_CLASS(oc); | |
242 | if (!dc->user_creatable || | |
243 | (qdev_hotplug && !dc->hotpluggable)) { | |
244 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver", | |
245 | "pluggable device type"); | |
246 | return NULL; | |
247 | } | |
248 | ||
249 | return dc; | |
250 | } | |
251 | ||
252 | ||
253 | int qdev_device_help(QemuOpts *opts) | |
254 | { | |
255 | Error *local_err = NULL; | |
256 | const char *driver; | |
257 | ObjectPropertyInfoList *prop_list; | |
258 | ObjectPropertyInfoList *prop; | |
259 | ||
260 | driver = qemu_opt_get(opts, "driver"); | |
261 | if (driver && is_help_option(driver)) { | |
262 | qdev_print_devinfos(false); | |
263 | return 1; | |
264 | } | |
265 | ||
266 | if (!driver || !qemu_opt_has_help_opt(opts)) { | |
267 | return 0; | |
268 | } | |
269 | ||
270 | if (!object_class_by_name(driver)) { | |
271 | const char *typename = find_typename_by_alias(driver); | |
272 | ||
273 | if (typename) { | |
274 | driver = typename; | |
275 | } | |
276 | } | |
277 | ||
278 | prop_list = qmp_device_list_properties(driver, &local_err); | |
279 | if (local_err) { | |
280 | goto error; | |
281 | } | |
282 | ||
283 | if (prop_list) { | |
284 | qemu_printf("%s options:\n", driver); | |
285 | } else { | |
286 | qemu_printf("There are no options for %s.\n", driver); | |
287 | } | |
288 | for (prop = prop_list; prop; prop = prop->next) { | |
289 | int len; | |
290 | qemu_printf(" %s=<%s>%n", prop->value->name, prop->value->type, &len); | |
291 | if (prop->value->has_description) { | |
292 | if (len < 24) { | |
293 | qemu_printf("%*s", 24 - len, ""); | |
294 | } | |
295 | qemu_printf(" - %s\n", prop->value->description); | |
296 | } else { | |
297 | qemu_printf("\n"); | |
298 | } | |
299 | } | |
300 | ||
301 | qapi_free_ObjectPropertyInfoList(prop_list); | |
302 | return 1; | |
303 | ||
304 | error: | |
305 | error_report_err(local_err); | |
306 | return 1; | |
307 | } | |
308 | ||
309 | static Object *qdev_get_peripheral(void) | |
310 | { | |
311 | static Object *dev; | |
312 | ||
313 | if (dev == NULL) { | |
314 | dev = container_get(qdev_get_machine(), "/peripheral"); | |
315 | } | |
316 | ||
317 | return dev; | |
318 | } | |
319 | ||
320 | static Object *qdev_get_peripheral_anon(void) | |
321 | { | |
322 | static Object *dev; | |
323 | ||
324 | if (dev == NULL) { | |
325 | dev = container_get(qdev_get_machine(), "/peripheral-anon"); | |
326 | } | |
327 | ||
328 | return dev; | |
329 | } | |
330 | ||
331 | static void qbus_list_bus(DeviceState *dev, Error **errp) | |
332 | { | |
333 | BusState *child; | |
334 | const char *sep = " "; | |
335 | ||
336 | error_append_hint(errp, "child buses at \"%s\":", | |
337 | dev->id ? dev->id : object_get_typename(OBJECT(dev))); | |
338 | QLIST_FOREACH(child, &dev->child_bus, sibling) { | |
339 | error_append_hint(errp, "%s\"%s\"", sep, child->name); | |
340 | sep = ", "; | |
341 | } | |
342 | error_append_hint(errp, "\n"); | |
343 | } | |
344 | ||
345 | static void qbus_list_dev(BusState *bus, Error **errp) | |
346 | { | |
347 | BusChild *kid; | |
348 | const char *sep = " "; | |
349 | ||
350 | error_append_hint(errp, "devices at \"%s\":", bus->name); | |
351 | QTAILQ_FOREACH(kid, &bus->children, sibling) { | |
352 | DeviceState *dev = kid->child; | |
353 | error_append_hint(errp, "%s\"%s\"", sep, | |
354 | object_get_typename(OBJECT(dev))); | |
355 | if (dev->id) { | |
356 | error_append_hint(errp, "/\"%s\"", dev->id); | |
357 | } | |
358 | sep = ", "; | |
359 | } | |
360 | error_append_hint(errp, "\n"); | |
361 | } | |
362 | ||
363 | static BusState *qbus_find_bus(DeviceState *dev, char *elem) | |
364 | { | |
365 | BusState *child; | |
366 | ||
367 | QLIST_FOREACH(child, &dev->child_bus, sibling) { | |
368 | if (strcmp(child->name, elem) == 0) { | |
369 | return child; | |
370 | } | |
371 | } | |
372 | return NULL; | |
373 | } | |
374 | ||
375 | static DeviceState *qbus_find_dev(BusState *bus, char *elem) | |
376 | { | |
377 | BusChild *kid; | |
378 | ||
379 | /* | |
380 | * try to match in order: | |
381 | * (1) instance id, if present | |
382 | * (2) driver name | |
383 | * (3) driver alias, if present | |
384 | */ | |
385 | QTAILQ_FOREACH(kid, &bus->children, sibling) { | |
386 | DeviceState *dev = kid->child; | |
387 | if (dev->id && strcmp(dev->id, elem) == 0) { | |
388 | return dev; | |
389 | } | |
390 | } | |
391 | QTAILQ_FOREACH(kid, &bus->children, sibling) { | |
392 | DeviceState *dev = kid->child; | |
393 | if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) { | |
394 | return dev; | |
395 | } | |
396 | } | |
397 | QTAILQ_FOREACH(kid, &bus->children, sibling) { | |
398 | DeviceState *dev = kid->child; | |
399 | DeviceClass *dc = DEVICE_GET_CLASS(dev); | |
400 | ||
401 | if (qdev_class_has_alias(dc) && | |
402 | strcmp(qdev_class_get_alias(dc), elem) == 0) { | |
403 | return dev; | |
404 | } | |
405 | } | |
406 | return NULL; | |
407 | } | |
408 | ||
409 | static inline bool qbus_is_full(BusState *bus) | |
410 | { | |
411 | BusClass *bus_class = BUS_GET_CLASS(bus); | |
412 | return bus_class->max_dev && bus->num_children >= bus_class->max_dev; | |
413 | } | |
414 | ||
415 | /* | |
416 | * Search the tree rooted at @bus for a bus. | |
417 | * If @name, search for a bus with that name. Note that bus names | |
418 | * need not be unique. Yes, that's screwed up. | |
419 | * Else search for a bus that is a subtype of @bus_typename. | |
420 | * If more than one exists, prefer one that can take another device. | |
421 | * Return the bus if found, else %NULL. | |
422 | */ | |
423 | static BusState *qbus_find_recursive(BusState *bus, const char *name, | |
424 | const char *bus_typename) | |
425 | { | |
426 | BusChild *kid; | |
427 | BusState *pick, *child, *ret; | |
428 | bool match; | |
429 | ||
430 | assert(name || bus_typename); | |
431 | if (name) { | |
432 | match = !strcmp(bus->name, name); | |
433 | } else { | |
434 | match = !!object_dynamic_cast(OBJECT(bus), bus_typename); | |
435 | } | |
436 | ||
437 | if (match && !qbus_is_full(bus)) { | |
438 | return bus; /* root matches and isn't full */ | |
439 | } | |
440 | ||
441 | pick = match ? bus : NULL; | |
442 | ||
443 | QTAILQ_FOREACH(kid, &bus->children, sibling) { | |
444 | DeviceState *dev = kid->child; | |
445 | QLIST_FOREACH(child, &dev->child_bus, sibling) { | |
446 | ret = qbus_find_recursive(child, name, bus_typename); | |
447 | if (ret && !qbus_is_full(ret)) { | |
448 | return ret; /* a descendant matches and isn't full */ | |
449 | } | |
450 | if (ret && !pick) { | |
451 | pick = ret; | |
452 | } | |
453 | } | |
454 | } | |
455 | ||
456 | /* root or a descendant matches, but is full */ | |
457 | return pick; | |
458 | } | |
459 | ||
460 | static BusState *qbus_find(const char *path, Error **errp) | |
461 | { | |
462 | DeviceState *dev; | |
463 | BusState *bus; | |
464 | char elem[128]; | |
465 | int pos, len; | |
466 | ||
467 | /* find start element */ | |
468 | if (path[0] == '/') { | |
469 | bus = sysbus_get_default(); | |
470 | pos = 0; | |
471 | } else { | |
472 | if (sscanf(path, "%127[^/]%n", elem, &len) != 1) { | |
473 | assert(!path[0]); | |
474 | elem[0] = len = 0; | |
475 | } | |
476 | bus = qbus_find_recursive(sysbus_get_default(), elem, NULL); | |
477 | if (!bus) { | |
478 | error_setg(errp, "Bus '%s' not found", elem); | |
479 | return NULL; | |
480 | } | |
481 | pos = len; | |
482 | } | |
483 | ||
484 | for (;;) { | |
485 | assert(path[pos] == '/' || !path[pos]); | |
486 | while (path[pos] == '/') { | |
487 | pos++; | |
488 | } | |
489 | if (path[pos] == '\0') { | |
490 | break; | |
491 | } | |
492 | ||
493 | /* find device */ | |
494 | if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) { | |
495 | g_assert_not_reached(); | |
496 | elem[0] = len = 0; | |
497 | } | |
498 | pos += len; | |
499 | dev = qbus_find_dev(bus, elem); | |
500 | if (!dev) { | |
501 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
502 | "Device '%s' not found", elem); | |
503 | qbus_list_dev(bus, errp); | |
504 | return NULL; | |
505 | } | |
506 | ||
507 | assert(path[pos] == '/' || !path[pos]); | |
508 | while (path[pos] == '/') { | |
509 | pos++; | |
510 | } | |
511 | if (path[pos] == '\0') { | |
512 | /* last specified element is a device. If it has exactly | |
513 | * one child bus accept it nevertheless */ | |
514 | if (dev->num_child_bus == 1) { | |
515 | bus = QLIST_FIRST(&dev->child_bus); | |
516 | break; | |
517 | } | |
518 | if (dev->num_child_bus) { | |
519 | error_setg(errp, "Device '%s' has multiple child buses", | |
520 | elem); | |
521 | qbus_list_bus(dev, errp); | |
522 | } else { | |
523 | error_setg(errp, "Device '%s' has no child bus", elem); | |
524 | } | |
525 | return NULL; | |
526 | } | |
527 | ||
528 | /* find bus */ | |
529 | if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) { | |
530 | g_assert_not_reached(); | |
531 | elem[0] = len = 0; | |
532 | } | |
533 | pos += len; | |
534 | bus = qbus_find_bus(dev, elem); | |
535 | if (!bus) { | |
536 | error_setg(errp, "Bus '%s' not found", elem); | |
537 | qbus_list_bus(dev, errp); | |
538 | return NULL; | |
539 | } | |
540 | } | |
541 | ||
542 | if (qbus_is_full(bus)) { | |
543 | error_setg(errp, "Bus '%s' is full", path); | |
544 | return NULL; | |
545 | } | |
546 | return bus; | |
547 | } | |
548 | ||
549 | void qdev_set_id(DeviceState *dev, const char *id) | |
550 | { | |
551 | if (id) { | |
552 | dev->id = id; | |
553 | } | |
554 | ||
555 | if (dev->id) { | |
556 | object_property_add_child(qdev_get_peripheral(), dev->id, | |
557 | OBJECT(dev), NULL); | |
558 | } else { | |
559 | static int anon_count; | |
560 | gchar *name = g_strdup_printf("device[%d]", anon_count++); | |
561 | object_property_add_child(qdev_get_peripheral_anon(), name, | |
562 | OBJECT(dev), NULL); | |
563 | g_free(name); | |
564 | } | |
565 | } | |
566 | ||
567 | static int is_failover_device(void *opaque, const char *name, const char *value, | |
568 | Error **errp) | |
569 | { | |
570 | if (strcmp(name, "failover_pair_id") == 0) { | |
571 | QemuOpts *opts = (QemuOpts *)opaque; | |
572 | ||
573 | if (qdev_should_hide_device(opts)) { | |
574 | return 1; | |
575 | } | |
576 | } | |
577 | ||
578 | return 0; | |
579 | } | |
580 | ||
581 | static bool should_hide_device(QemuOpts *opts) | |
582 | { | |
583 | if (qemu_opt_foreach(opts, is_failover_device, opts, NULL) == 0) { | |
584 | return false; | |
585 | } | |
586 | return true; | |
587 | } | |
588 | ||
589 | DeviceState *qdev_device_add(QemuOpts *opts, Error **errp) | |
590 | { | |
591 | DeviceClass *dc; | |
592 | const char *driver, *path; | |
593 | DeviceState *dev = NULL; | |
594 | BusState *bus = NULL; | |
595 | Error *err = NULL; | |
596 | bool hide; | |
597 | ||
598 | driver = qemu_opt_get(opts, "driver"); | |
599 | if (!driver) { | |
600 | error_setg(errp, QERR_MISSING_PARAMETER, "driver"); | |
601 | return NULL; | |
602 | } | |
603 | ||
604 | /* find driver */ | |
605 | dc = qdev_get_device_class(&driver, errp); | |
606 | if (!dc) { | |
607 | return NULL; | |
608 | } | |
609 | ||
610 | /* find bus */ | |
611 | path = qemu_opt_get(opts, "bus"); | |
612 | if (path != NULL) { | |
613 | bus = qbus_find(path, errp); | |
614 | if (!bus) { | |
615 | return NULL; | |
616 | } | |
617 | if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) { | |
618 | error_setg(errp, "Device '%s' can't go on %s bus", | |
619 | driver, object_get_typename(OBJECT(bus))); | |
620 | return NULL; | |
621 | } | |
622 | } else if (dc->bus_type != NULL) { | |
623 | bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type); | |
624 | if (!bus || qbus_is_full(bus)) { | |
625 | error_setg(errp, "No '%s' bus found for device '%s'", | |
626 | dc->bus_type, driver); | |
627 | return NULL; | |
628 | } | |
629 | } | |
630 | hide = should_hide_device(opts); | |
631 | ||
632 | if ((hide || qdev_hotplug) && bus && !qbus_is_hotpluggable(bus)) { | |
633 | error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name); | |
634 | return NULL; | |
635 | } | |
636 | ||
637 | if (hide) { | |
638 | return NULL; | |
639 | } | |
640 | ||
641 | if (!migration_is_idle()) { | |
642 | error_setg(errp, "device_add not allowed while migrating"); | |
643 | return NULL; | |
644 | } | |
645 | ||
646 | /* create device */ | |
647 | dev = DEVICE(object_new(driver)); | |
648 | ||
649 | /* Check whether the hotplug is allowed by the machine */ | |
650 | if (qdev_hotplug && !qdev_hotplug_allowed(dev, &err)) { | |
651 | /* Error must be set in the machine hook */ | |
652 | assert(err); | |
653 | goto err_del_dev; | |
654 | } | |
655 | ||
656 | if (bus) { | |
657 | qdev_set_parent_bus(dev, bus); | |
658 | } else if (qdev_hotplug && !qdev_get_machine_hotplug_handler(dev)) { | |
659 | /* No bus, no machine hotplug handler --> device is not hotpluggable */ | |
660 | error_setg(&err, "Device '%s' can not be hotplugged on this machine", | |
661 | driver); | |
662 | goto err_del_dev; | |
663 | } | |
664 | ||
665 | qdev_set_id(dev, qemu_opts_id(opts)); | |
666 | ||
667 | /* set properties */ | |
668 | if (qemu_opt_foreach(opts, set_property, dev, &err)) { | |
669 | goto err_del_dev; | |
670 | } | |
671 | ||
672 | dev->opts = opts; | |
673 | object_property_set_bool(OBJECT(dev), true, "realized", &err); | |
674 | if (err != NULL) { | |
675 | dev->opts = NULL; | |
676 | goto err_del_dev; | |
677 | } | |
678 | return dev; | |
679 | ||
680 | err_del_dev: | |
681 | error_propagate(errp, err); | |
682 | if (dev) { | |
683 | object_unparent(OBJECT(dev)); | |
684 | object_unref(OBJECT(dev)); | |
685 | } | |
686 | return NULL; | |
687 | } | |
688 | ||
689 | ||
690 | #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__) | |
691 | static void qbus_print(Monitor *mon, BusState *bus, int indent); | |
692 | ||
693 | static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props, | |
694 | int indent) | |
695 | { | |
696 | if (!props) | |
697 | return; | |
698 | for (; props->name; props++) { | |
699 | Error *err = NULL; | |
700 | char *value; | |
701 | char *legacy_name = g_strdup_printf("legacy-%s", props->name); | |
702 | if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) { | |
703 | value = object_property_get_str(OBJECT(dev), legacy_name, &err); | |
704 | } else { | |
705 | value = object_property_print(OBJECT(dev), props->name, true, &err); | |
706 | } | |
707 | g_free(legacy_name); | |
708 | ||
709 | if (err) { | |
710 | error_free(err); | |
711 | continue; | |
712 | } | |
713 | qdev_printf("%s = %s\n", props->name, | |
714 | value && *value ? value : "<null>"); | |
715 | g_free(value); | |
716 | } | |
717 | } | |
718 | ||
719 | static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent) | |
720 | { | |
721 | BusClass *bc = BUS_GET_CLASS(bus); | |
722 | ||
723 | if (bc->print_dev) { | |
724 | bc->print_dev(mon, dev, indent); | |
725 | } | |
726 | } | |
727 | ||
728 | static void qdev_print(Monitor *mon, DeviceState *dev, int indent) | |
729 | { | |
730 | ObjectClass *class; | |
731 | BusState *child; | |
732 | NamedGPIOList *ngl; | |
733 | ||
734 | qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)), | |
735 | dev->id ? dev->id : ""); | |
736 | indent += 2; | |
737 | QLIST_FOREACH(ngl, &dev->gpios, node) { | |
738 | if (ngl->num_in) { | |
739 | qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "", | |
740 | ngl->num_in); | |
741 | } | |
742 | if (ngl->num_out) { | |
743 | qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "", | |
744 | ngl->num_out); | |
745 | } | |
746 | } | |
747 | class = object_get_class(OBJECT(dev)); | |
748 | do { | |
749 | qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent); | |
750 | class = object_class_get_parent(class); | |
751 | } while (class != object_class_by_name(TYPE_DEVICE)); | |
752 | bus_print_dev(dev->parent_bus, mon, dev, indent); | |
753 | QLIST_FOREACH(child, &dev->child_bus, sibling) { | |
754 | qbus_print(mon, child, indent); | |
755 | } | |
756 | } | |
757 | ||
758 | static void qbus_print(Monitor *mon, BusState *bus, int indent) | |
759 | { | |
760 | BusChild *kid; | |
761 | ||
762 | qdev_printf("bus: %s\n", bus->name); | |
763 | indent += 2; | |
764 | qdev_printf("type %s\n", object_get_typename(OBJECT(bus))); | |
765 | QTAILQ_FOREACH(kid, &bus->children, sibling) { | |
766 | DeviceState *dev = kid->child; | |
767 | qdev_print(mon, dev, indent); | |
768 | } | |
769 | } | |
770 | #undef qdev_printf | |
771 | ||
772 | void hmp_info_qtree(Monitor *mon, const QDict *qdict) | |
773 | { | |
774 | if (sysbus_get_default()) | |
775 | qbus_print(mon, sysbus_get_default(), 0); | |
776 | } | |
777 | ||
778 | void hmp_info_qdm(Monitor *mon, const QDict *qdict) | |
779 | { | |
780 | qdev_print_devinfos(true); | |
781 | } | |
782 | ||
783 | void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp) | |
784 | { | |
785 | Error *local_err = NULL; | |
786 | QemuOpts *opts; | |
787 | DeviceState *dev; | |
788 | ||
789 | opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err); | |
790 | if (local_err) { | |
791 | error_propagate(errp, local_err); | |
792 | return; | |
793 | } | |
794 | if (!monitor_cur_is_qmp() && qdev_device_help(opts)) { | |
795 | qemu_opts_del(opts); | |
796 | return; | |
797 | } | |
798 | dev = qdev_device_add(opts, &local_err); | |
799 | if (!dev) { | |
800 | error_propagate(errp, local_err); | |
801 | qemu_opts_del(opts); | |
802 | return; | |
803 | } | |
804 | object_unref(OBJECT(dev)); | |
805 | } | |
806 | ||
807 | static DeviceState *find_device_state(const char *id, Error **errp) | |
808 | { | |
809 | Object *obj; | |
810 | ||
811 | if (id[0] == '/') { | |
812 | obj = object_resolve_path(id, NULL); | |
813 | } else { | |
814 | char *root_path = object_get_canonical_path(qdev_get_peripheral()); | |
815 | char *path = g_strdup_printf("%s/%s", root_path, id); | |
816 | ||
817 | g_free(root_path); | |
818 | obj = object_resolve_path_type(path, TYPE_DEVICE, NULL); | |
819 | g_free(path); | |
820 | } | |
821 | ||
822 | if (!obj) { | |
823 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
824 | "Device '%s' not found", id); | |
825 | return NULL; | |
826 | } | |
827 | ||
828 | if (!object_dynamic_cast(obj, TYPE_DEVICE)) { | |
829 | error_setg(errp, "%s is not a hotpluggable device", id); | |
830 | return NULL; | |
831 | } | |
832 | ||
833 | return DEVICE(obj); | |
834 | } | |
835 | ||
836 | void qdev_unplug(DeviceState *dev, Error **errp) | |
837 | { | |
838 | DeviceClass *dc = DEVICE_GET_CLASS(dev); | |
839 | HotplugHandler *hotplug_ctrl; | |
840 | HotplugHandlerClass *hdc; | |
841 | Error *local_err = NULL; | |
842 | ||
843 | if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) { | |
844 | error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name); | |
845 | return; | |
846 | } | |
847 | ||
848 | if (!dc->hotpluggable) { | |
849 | error_setg(errp, QERR_DEVICE_NO_HOTPLUG, | |
850 | object_get_typename(OBJECT(dev))); | |
851 | return; | |
852 | } | |
853 | ||
854 | if (!migration_is_idle() && !dev->allow_unplug_during_migration) { | |
855 | error_setg(errp, "device_del not allowed while migrating"); | |
856 | return; | |
857 | } | |
858 | ||
859 | qdev_hot_removed = true; | |
860 | ||
861 | hotplug_ctrl = qdev_get_hotplug_handler(dev); | |
862 | /* hotpluggable device MUST have HotplugHandler, if it doesn't | |
863 | * then something is very wrong with it */ | |
864 | g_assert(hotplug_ctrl); | |
865 | ||
866 | /* If device supports async unplug just request it to be done, | |
867 | * otherwise just remove it synchronously */ | |
868 | hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl); | |
869 | if (hdc->unplug_request) { | |
870 | hotplug_handler_unplug_request(hotplug_ctrl, dev, &local_err); | |
871 | } else { | |
872 | hotplug_handler_unplug(hotplug_ctrl, dev, &local_err); | |
873 | if (!local_err) { | |
874 | object_unparent(OBJECT(dev)); | |
875 | } | |
876 | } | |
877 | error_propagate(errp, local_err); | |
878 | } | |
879 | ||
880 | void qmp_device_del(const char *id, Error **errp) | |
881 | { | |
882 | DeviceState *dev = find_device_state(id, errp); | |
883 | if (dev != NULL) { | |
884 | qdev_unplug(dev, errp); | |
885 | } | |
886 | } | |
887 | ||
888 | void hmp_device_add(Monitor *mon, const QDict *qdict) | |
889 | { | |
890 | Error *err = NULL; | |
891 | ||
892 | qmp_device_add((QDict *)qdict, NULL, &err); | |
893 | hmp_handle_error(mon, &err); | |
894 | } | |
895 | ||
896 | void hmp_device_del(Monitor *mon, const QDict *qdict) | |
897 | { | |
898 | const char *id = qdict_get_str(qdict, "id"); | |
899 | Error *err = NULL; | |
900 | ||
901 | qmp_device_del(id, &err); | |
902 | hmp_handle_error(mon, &err); | |
903 | } | |
904 | ||
905 | BlockBackend *blk_by_qdev_id(const char *id, Error **errp) | |
906 | { | |
907 | DeviceState *dev; | |
908 | BlockBackend *blk; | |
909 | ||
910 | dev = find_device_state(id, errp); | |
911 | if (dev == NULL) { | |
912 | return NULL; | |
913 | } | |
914 | ||
915 | blk = blk_by_dev(dev); | |
916 | if (!blk) { | |
917 | error_setg(errp, "Device does not have a block device backend"); | |
918 | } | |
919 | return blk; | |
920 | } | |
921 | ||
922 | void qdev_machine_init(void) | |
923 | { | |
924 | qdev_get_peripheral_anon(); | |
925 | qdev_get_peripheral(); | |
926 | } | |
927 | ||
928 | QemuOptsList qemu_device_opts = { | |
929 | .name = "device", | |
930 | .implied_opt_name = "driver", | |
931 | .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head), | |
932 | .desc = { | |
933 | /* | |
934 | * no elements => accept any | |
935 | * sanity checking will happen later | |
936 | * when setting device properties | |
937 | */ | |
938 | { /* end of list */ } | |
939 | }, | |
940 | }; | |
941 | ||
942 | QemuOptsList qemu_global_opts = { | |
943 | .name = "global", | |
944 | .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head), | |
945 | .desc = { | |
946 | { | |
947 | .name = "driver", | |
948 | .type = QEMU_OPT_STRING, | |
949 | },{ | |
950 | .name = "property", | |
951 | .type = QEMU_OPT_STRING, | |
952 | },{ | |
953 | .name = "value", | |
954 | .type = QEMU_OPT_STRING, | |
955 | }, | |
956 | { /* end of list */ } | |
957 | }, | |
958 | }; | |
959 | ||
960 | int qemu_global_option(const char *str) | |
961 | { | |
962 | char driver[64], property[64]; | |
963 | QemuOpts *opts; | |
964 | int rc, offset; | |
965 | ||
966 | rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset); | |
967 | if (rc == 2 && str[offset] == '=') { | |
968 | opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort); | |
969 | qemu_opt_set(opts, "driver", driver, &error_abort); | |
970 | qemu_opt_set(opts, "property", property, &error_abort); | |
971 | qemu_opt_set(opts, "value", str + offset + 1, &error_abort); | |
972 | return 0; | |
973 | } | |
974 | ||
975 | opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false); | |
976 | if (!opts) { | |
977 | return -1; | |
978 | } | |
979 | ||
980 | return 0; | |
981 | } |