2 * qdev property parsing and global properties
3 * (parts specific for qemu-system-*)
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.
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.
13 #include "qemu/osdep.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"
22 #include "qapi/visitor.h"
23 #include "sysemu/char.h"
24 #include "sysemu/iothread.h"
26 static void get_pointer(Object *obj, Visitor *v, Property *prop,
27 char *(*print)(void *ptr),
28 const char *name, Error **errp)
30 DeviceState *dev = DEVICE(obj);
31 void **ptr = qdev_get_prop_ptr(dev, prop);
34 p = *ptr ? print(*ptr) : g_strdup("");
35 visit_type_str(v, name, &p, errp);
39 static void set_pointer(Object *obj, Visitor *v, Property *prop,
40 void (*parse)(DeviceState *dev, const char *str,
41 void **ptr, const char *propname,
43 const char *name, Error **errp)
45 DeviceState *dev = DEVICE(obj);
46 Error *local_err = NULL;
47 void **ptr = qdev_get_prop_ptr(dev, prop);
51 qdev_prop_set_after_realize(dev, name, errp);
55 visit_type_str(v, name, &str, &local_err);
57 error_propagate(errp, local_err);
65 parse(dev, str, ptr, prop->name, errp);
71 static void parse_drive(DeviceState *dev, const char *str, void **ptr,
72 const char *propname, Error **errp)
76 blk = blk_by_name(str);
78 error_setg(errp, "Property '%s.%s' can't find value '%s'",
79 object_get_typename(OBJECT(dev)), propname, str);
82 if (blk_attach_dev(blk, dev) < 0) {
83 DriveInfo *dinfo = blk_legacy_dinfo(blk);
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?)",
91 error_setg(errp, "Drive '%s' is already in use by another device",
99 static void release_drive(Object *obj, const char *name, void *opaque)
101 DeviceState *dev = DEVICE(obj);
102 Property *prop = opaque;
103 BlockBackend **ptr = qdev_get_prop_ptr(dev, prop);
106 blk_detach_dev(*ptr, dev);
107 blockdev_auto_del(*ptr);
111 static char *print_drive(void *ptr)
113 return g_strdup(blk_name(ptr));
116 static void get_drive(Object *obj, Visitor *v, const char *name, void *opaque,
119 get_pointer(obj, v, opaque, print_drive, name, errp);
122 static void set_drive(Object *obj, Visitor *v, const char *name, void *opaque,
125 set_pointer(obj, v, opaque, parse_drive, name, errp);
128 PropertyInfo qdev_prop_drive = {
130 .description = "ID of a drive to use as a backend",
133 .release = release_drive,
136 /* --- character device --- */
138 static void parse_chr(DeviceState *dev, const char *str, void **ptr,
139 const char *propname, Error **errp)
141 CharDriverState *chr = qemu_chr_find(str);
143 error_setg(errp, "Property '%s.%s' can't find value '%s'",
144 object_get_typename(OBJECT(dev)), propname, str);
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);
155 static void release_chr(Object *obj, const char *name, void *opaque)
157 DeviceState *dev = DEVICE(obj);
158 Property *prop = opaque;
159 CharDriverState **ptr = qdev_get_prop_ptr(dev, prop);
160 CharDriverState *chr = *ptr;
163 qemu_chr_add_handlers(chr, NULL, NULL, NULL, NULL);
164 qemu_chr_fe_release(chr);
169 static char *print_chr(void *ptr)
171 CharDriverState *chr = ptr;
172 const char *val = chr->label ? chr->label : "";
174 return g_strdup(val);
177 static void get_chr(Object *obj, Visitor *v, const char *name, void *opaque,
180 get_pointer(obj, v, opaque, print_chr, name, errp);
183 static void set_chr(Object *obj, Visitor *v, const char *name, void *opaque,
186 set_pointer(obj, v, opaque, parse_chr, name, errp);
189 PropertyInfo qdev_prop_chr = {
191 .description = "ID of a chardev to use as a backend",
194 .release = release_chr,
197 /* --- netdev device --- */
198 static void get_netdev(Object *obj, Visitor *v, const char *name,
199 void *opaque, Error **errp)
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 : "");
206 visit_type_str(v, name, &p, errp);
210 static void set_netdev(Object *obj, Visitor *v, const char *name,
211 void *opaque, Error **errp)
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;
223 qdev_prop_set_after_realize(dev, name, errp);
227 visit_type_str(v, name, &str, &local_err);
229 error_propagate(errp, local_err);
233 queues = qemu_find_net_clients_except(str, peers,
234 NET_CLIENT_OPTIONS_KIND_NIC,
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);
247 for (i = 0; i < queues; i++) {
248 if (peers[i] == NULL) {
253 if (peers[i]->peer) {
264 ncs[i]->queue_index = i;
267 peers_ptr->queues = queues;
270 error_set_from_qdev_prop_error(errp, err, dev, prop, str);
274 PropertyInfo qdev_prop_netdev = {
276 .description = "ID of a netdev to use as a backend",
283 static int print_vlan(DeviceState *dev, Property *prop, char *dest, size_t len)
285 NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
289 if (!net_hub_id_for_client(*ptr, &id)) {
290 return snprintf(dest, len, "%d", id);
294 return snprintf(dest, len, "<null>");
297 static void get_vlan(Object *obj, Visitor *v, const char *name, void *opaque,
300 DeviceState *dev = DEVICE(obj);
301 Property *prop = opaque;
302 NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
307 if (!net_hub_id_for_client(*ptr, &hub_id)) {
312 visit_type_int32(v, name, &id, errp);
315 static void set_vlan(Object *obj, Visitor *v, const char *name, void *opaque,
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;
324 NetClientState *hubport;
327 qdev_prop_set_after_realize(dev, name, errp);
331 visit_type_int32(v, name, &id, &local_err);
333 error_propagate(errp, local_err);
341 error_set_from_qdev_prop_error(errp, -EINVAL, dev, prop, name);
345 hubport = net_hub_port_find(id);
347 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
348 name, prop->info->name);
354 PropertyInfo qdev_prop_vlan = {
356 .description = "Integer VLAN id to connect to",
362 void qdev_prop_set_drive(DeviceState *dev, const char *name,
363 BlockBackend *value, Error **errp)
365 object_property_set_str(OBJECT(dev), value ? blk_name(value) : "",
369 void qdev_prop_set_chr(DeviceState *dev, const char *name,
370 CharDriverState *value)
372 assert(!value || value->label);
373 object_property_set_str(OBJECT(dev),
374 value ? value->label : "", name, &error_abort);
377 void qdev_prop_set_netdev(DeviceState *dev, const char *name,
378 NetClientState *value)
380 assert(!value || value->name);
381 object_property_set_str(OBJECT(dev),
382 value ? value->name : "", name, &error_abort);
385 void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
387 qdev_prop_set_macaddr(dev, "mac", nd->macaddr.a);
389 qdev_prop_set_netdev(dev, "netdev", nd->netdev);
391 if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
392 object_property_find(OBJECT(dev), "vectors", NULL)) {
393 qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
395 nd->instantiated = 1;
398 static int qdev_add_one_global(void *opaque, QemuOpts *opts, Error **errp)
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);
411 void qemu_add_globals(void)
413 qemu_opts_foreach(qemu_find_opts("global"),
414 qdev_add_one_global, NULL, NULL);