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13#include "qemu/osdep.h"
14#include "net/net.h"
15#include "hw/qdev.h"
16#include "qapi/error.h"
17#include "qapi/qmp/qerror.h"
18#include "sysemu/block-backend.h"
19#include "sysemu/blockdev.h"
20#include "hw/block/block.h"
21#include "net/hub.h"
22#include "qapi/visitor.h"
23#include "sysemu/char.h"
24#include "sysemu/iothread.h"
25
26static void get_pointer(Object *obj, Visitor *v, Property *prop,
27 char *(*print)(void *ptr),
28 const char *name, Error **errp)
29{
30 DeviceState *dev = DEVICE(obj);
31 void **ptr = qdev_get_prop_ptr(dev, prop);
32 char *p;
33
34 p = *ptr ? print(*ptr) : g_strdup("");
35 visit_type_str(v, name, &p, errp);
36 g_free(p);
37}
38
39static void set_pointer(Object *obj, Visitor *v, Property *prop,
40 void (*parse)(DeviceState *dev, const char *str,
41 void **ptr, const char *propname,
42 Error **errp),
43 const char *name, Error **errp)
44{
45 DeviceState *dev = DEVICE(obj);
46 Error *local_err = NULL;
47 void **ptr = qdev_get_prop_ptr(dev, prop);
48 char *str;
49
50 if (dev->realized) {
51 qdev_prop_set_after_realize(dev, name, errp);
52 return;
53 }
54
55 visit_type_str(v, name, &str, &local_err);
56 if (local_err) {
57 error_propagate(errp, local_err);
58 return;
59 }
60 if (!*str) {
61 g_free(str);
62 *ptr = NULL;
63 return;
64 }
65 parse(dev, str, ptr, prop->name, errp);
66 g_free(str);
67}
68
69
70
71static void parse_drive(DeviceState *dev, const char *str, void **ptr,
72 const char *propname, Error **errp)
73{
74 BlockBackend *blk;
75
76 blk = blk_by_name(str);
77 if (!blk) {
78 error_setg(errp, "Property '%s.%s' can't find value '%s'",
79 object_get_typename(OBJECT(dev)), propname, str);
80 return;
81 }
82 if (blk_attach_dev(blk, dev) < 0) {
83 DriveInfo *dinfo = blk_legacy_dinfo(blk);
84
85 if (dinfo->type != IF_NONE) {
86 error_setg(errp, "Drive '%s' is already in use because "
87 "it has been automatically connected to another "
88 "device (did you need 'if=none' in the drive options?)",
89 str);
90 } else {
91 error_setg(errp, "Drive '%s' is already in use by another device",
92 str);
93 }
94 return;
95 }
96 *ptr = blk;
97}
98
99static void release_drive(Object *obj, const char *name, void *opaque)
100{
101 DeviceState *dev = DEVICE(obj);
102 Property *prop = opaque;
103 BlockBackend **ptr = qdev_get_prop_ptr(dev, prop);
104
105 if (*ptr) {
106 blk_detach_dev(*ptr, dev);
107 blockdev_auto_del(*ptr);
108 }
109}
110
111static char *print_drive(void *ptr)
112{
113 return g_strdup(blk_name(ptr));
114}
115
116static void get_drive(Object *obj, Visitor *v, const char *name, void *opaque,
117 Error **errp)
118{
119 get_pointer(obj, v, opaque, print_drive, name, errp);
120}
121
122static void set_drive(Object *obj, Visitor *v, const char *name, void *opaque,
123 Error **errp)
124{
125 set_pointer(obj, v, opaque, parse_drive, name, errp);
126}
127
128PropertyInfo qdev_prop_drive = {
129 .name = "str",
130 .description = "ID of a drive to use as a backend",
131 .get = get_drive,
132 .set = set_drive,
133 .release = release_drive,
134};
135
136
137
138static void parse_chr(DeviceState *dev, const char *str, void **ptr,
139 const char *propname, Error **errp)
140{
141 CharDriverState *chr = qemu_chr_find(str);
142 if (chr == NULL) {
143 error_setg(errp, "Property '%s.%s' can't find value '%s'",
144 object_get_typename(OBJECT(dev)), propname, str);
145 return;
146 }
147 if (qemu_chr_fe_claim(chr) != 0) {
148 error_setg(errp, "Property '%s.%s' can't take value '%s', it's in use",
149 object_get_typename(OBJECT(dev)), propname, str);
150 return;
151 }
152 *ptr = chr;
153}
154
155static void release_chr(Object *obj, const char *name, void *opaque)
156{
157 DeviceState *dev = DEVICE(obj);
158 Property *prop = opaque;
159 CharDriverState **ptr = qdev_get_prop_ptr(dev, prop);
160 CharDriverState *chr = *ptr;
161
162 if (chr) {
163 qemu_chr_add_handlers(chr, NULL, NULL, NULL, NULL);
164 qemu_chr_fe_release(chr);
165 }
166}
167
168
169static char *print_chr(void *ptr)
170{
171 CharDriverState *chr = ptr;
172 const char *val = chr->label ? chr->label : "";
173
174 return g_strdup(val);
175}
176
177static void get_chr(Object *obj, Visitor *v, const char *name, void *opaque,
178 Error **errp)
179{
180 get_pointer(obj, v, opaque, print_chr, name, errp);
181}
182
183static void set_chr(Object *obj, Visitor *v, const char *name, void *opaque,
184 Error **errp)
185{
186 set_pointer(obj, v, opaque, parse_chr, name, errp);
187}
188
189PropertyInfo qdev_prop_chr = {
190 .name = "str",
191 .description = "ID of a chardev to use as a backend",
192 .get = get_chr,
193 .set = set_chr,
194 .release = release_chr,
195};
196
197
198static void get_netdev(Object *obj, Visitor *v, const char *name,
199 void *opaque, Error **errp)
200{
201 DeviceState *dev = DEVICE(obj);
202 Property *prop = opaque;
203 NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
204 char *p = g_strdup(peers_ptr->ncs[0] ? peers_ptr->ncs[0]->name : "");
205
206 visit_type_str(v, name, &p, errp);
207 g_free(p);
208}
209
210static void set_netdev(Object *obj, Visitor *v, const char *name,
211 void *opaque, Error **errp)
212{
213 DeviceState *dev = DEVICE(obj);
214 Property *prop = opaque;
215 NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
216 NetClientState **ncs = peers_ptr->ncs;
217 NetClientState *peers[MAX_QUEUE_NUM];
218 Error *local_err = NULL;
219 int queues, err = 0, i = 0;
220 char *str;
221
222 if (dev->realized) {
223 qdev_prop_set_after_realize(dev, name, errp);
224 return;
225 }
226
227 visit_type_str(v, name, &str, &local_err);
228 if (local_err) {
229 error_propagate(errp, local_err);
230 return;
231 }
232
233 queues = qemu_find_net_clients_except(str, peers,
234 NET_CLIENT_OPTIONS_KIND_NIC,
235 MAX_QUEUE_NUM);
236 if (queues == 0) {
237 err = -ENOENT;
238 goto out;
239 }
240
241 if (queues > MAX_QUEUE_NUM) {
242 error_setg(errp, "queues of backend '%s'(%d) exceeds QEMU limitation(%d)",
243 str, queues, MAX_QUEUE_NUM);
244 goto out;
245 }
246
247 for (i = 0; i < queues; i++) {
248 if (peers[i] == NULL) {
249 err = -ENOENT;
250 goto out;
251 }
252
253 if (peers[i]->peer) {
254 err = -EEXIST;
255 goto out;
256 }
257
258 if (ncs[i]) {
259 err = -EINVAL;
260 goto out;
261 }
262
263 ncs[i] = peers[i];
264 ncs[i]->queue_index = i;
265 }
266
267 peers_ptr->queues = queues;
268
269out:
270 error_set_from_qdev_prop_error(errp, err, dev, prop, str);
271 g_free(str);
272}
273
274PropertyInfo qdev_prop_netdev = {
275 .name = "str",
276 .description = "ID of a netdev to use as a backend",
277 .get = get_netdev,
278 .set = set_netdev,
279};
280
281
282
283static int print_vlan(DeviceState *dev, Property *prop, char *dest, size_t len)
284{
285 NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
286
287 if (*ptr) {
288 int id;
289 if (!net_hub_id_for_client(*ptr, &id)) {
290 return snprintf(dest, len, "%d", id);
291 }
292 }
293
294 return snprintf(dest, len, "<null>");
295}
296
297static void get_vlan(Object *obj, Visitor *v, const char *name, void *opaque,
298 Error **errp)
299{
300 DeviceState *dev = DEVICE(obj);
301 Property *prop = opaque;
302 NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
303 int32_t id = -1;
304
305 if (*ptr) {
306 int hub_id;
307 if (!net_hub_id_for_client(*ptr, &hub_id)) {
308 id = hub_id;
309 }
310 }
311
312 visit_type_int32(v, name, &id, errp);
313}
314
315static void set_vlan(Object *obj, Visitor *v, const char *name, void *opaque,
316 Error **errp)
317{
318 DeviceState *dev = DEVICE(obj);
319 Property *prop = opaque;
320 NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
321 NetClientState **ptr = &peers_ptr->ncs[0];
322 Error *local_err = NULL;
323 int32_t id;
324 NetClientState *hubport;
325
326 if (dev->realized) {
327 qdev_prop_set_after_realize(dev, name, errp);
328 return;
329 }
330
331 visit_type_int32(v, name, &id, &local_err);
332 if (local_err) {
333 error_propagate(errp, local_err);
334 return;
335 }
336 if (id == -1) {
337 *ptr = NULL;
338 return;
339 }
340 if (*ptr) {
341 error_set_from_qdev_prop_error(errp, -EINVAL, dev, prop, name);
342 return;
343 }
344
345 hubport = net_hub_port_find(id);
346 if (!hubport) {
347 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
348 name, prop->info->name);
349 return;
350 }
351 *ptr = hubport;
352}
353
354PropertyInfo qdev_prop_vlan = {
355 .name = "int32",
356 .description = "Integer VLAN id to connect to",
357 .print = print_vlan,
358 .get = get_vlan,
359 .set = set_vlan,
360};
361
362void qdev_prop_set_drive(DeviceState *dev, const char *name,
363 BlockBackend *value, Error **errp)
364{
365 object_property_set_str(OBJECT(dev), value ? blk_name(value) : "",
366 name, errp);
367}
368
369void qdev_prop_set_chr(DeviceState *dev, const char *name,
370 CharDriverState *value)
371{
372 assert(!value || value->label);
373 object_property_set_str(OBJECT(dev),
374 value ? value->label : "", name, &error_abort);
375}
376
377void qdev_prop_set_netdev(DeviceState *dev, const char *name,
378 NetClientState *value)
379{
380 assert(!value || value->name);
381 object_property_set_str(OBJECT(dev),
382 value ? value->name : "", name, &error_abort);
383}
384
385void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
386{
387 qdev_prop_set_macaddr(dev, "mac", nd->macaddr.a);
388 if (nd->netdev) {
389 qdev_prop_set_netdev(dev, "netdev", nd->netdev);
390 }
391 if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
392 object_property_find(OBJECT(dev), "vectors", NULL)) {
393 qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
394 }
395 nd->instantiated = 1;
396}
397
398static int qdev_add_one_global(void *opaque, QemuOpts *opts, Error **errp)
399{
400 GlobalProperty *g;
401
402 g = g_malloc0(sizeof(*g));
403 g->driver = qemu_opt_get(opts, "driver");
404 g->property = qemu_opt_get(opts, "property");
405 g->value = qemu_opt_get(opts, "value");
406 g->user_provided = true;
407 qdev_prop_register_global(g);
408 return 0;
409}
410
411void qemu_add_globals(void)
412{
413 qemu_opts_foreach(qemu_find_opts("global"),
414 qdev_add_one_global, NULL, NULL);
415}
416
