hw/core/qdev-properties-system.c

   1 /*
   2  * qdev property parsing and global properties
   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 "net/net.h"
  14 #include "hw/qdev.h"
  15 #include "qapi/qmp/qerror.h"
  16 #include "sysemu/blockdev.h"
  17 #include "hw/block/block.h"
  18 #include "net/hub.h"
  19 #include "qapi/visitor.h"
  20 #include "char/char.h"
  21
  22 static void get_pointer(Object *obj, Visitor *v, Property *prop,
  23                         const char *(*print)(void *ptr),
  24                         const char *name, Error **errp)
  25 {
  26     DeviceState *dev = DEVICE(obj);
  27     void **ptr = qdev_get_prop_ptr(dev, prop);
  28     char *p;
  29
  30     p = (char *) (*ptr ? print(*ptr) : "");
  31     visit_type_str(v, &p, name, errp);
  32 }
  33
  34 static void set_pointer(Object *obj, Visitor *v, Property *prop,
  35                         int (*parse)(DeviceState *dev, const char *str,
  36                                      void **ptr),
  37                         const char *name, Error **errp)
  38 {
  39     DeviceState *dev = DEVICE(obj);
  40     Error *local_err = NULL;
  41     void **ptr = qdev_get_prop_ptr(dev, prop);
  42     char *str;
  43     int ret;
  44
  45     if (dev->realized) {
  46         qdev_prop_set_after_realize(dev, name, errp);
  47         return;
  48     }
  49
  50     visit_type_str(v, &str, name, &local_err);
  51     if (local_err) {
  52         error_propagate(errp, local_err);
  53         return;
  54     }
  55     if (!*str) {
  56         g_free(str);
  57         *ptr = NULL;
  58         return;
  59     }
  60     ret = parse(dev, str, ptr);
  61     error_set_from_qdev_prop_error(errp, ret, dev, prop, str);
  62     g_free(str);
  63 }
  64
  65 /* --- drive --- */
  66
  67 static int parse_drive(DeviceState *dev, const char *str, void **ptr)
  68 {
  69     BlockDriverState *bs;
  70
  71     bs = bdrv_find(str);
  72     if (bs == NULL) {
  73         return -ENOENT;
  74     }
  75     if (bdrv_attach_dev(bs, dev) < 0) {
  76         return -EEXIST;
  77     }
  78     *ptr = bs;
  79     return 0;
  80 }
  81
  82 static void release_drive(Object *obj, const char *name, void *opaque)
  83 {
  84     DeviceState *dev = DEVICE(obj);
  85     Property *prop = opaque;
  86     BlockDriverState **ptr = qdev_get_prop_ptr(dev, prop);
  87
  88     if (*ptr) {
  89         bdrv_detach_dev(*ptr, dev);
  90         blockdev_auto_del(*ptr);
  91     }
  92 }
  93
  94 static const char *print_drive(void *ptr)
  95 {
  96     return bdrv_get_device_name(ptr);
  97 }
  98
  99 static void get_drive(Object *obj, Visitor *v, void *opaque,
 100                       const char *name, Error **errp)
 101 {
 102     get_pointer(obj, v, opaque, print_drive, name, errp);
 103 }
 104
 105 static void set_drive(Object *obj, Visitor *v, void *opaque,
 106                       const char *name, Error **errp)
 107 {
 108     set_pointer(obj, v, opaque, parse_drive, name, errp);
 109 }
 110
 111 PropertyInfo qdev_prop_drive = {
 112     .name  = "drive",
 113     .get   = get_drive,
 114     .set   = set_drive,
 115     .release = release_drive,
 116 };
 117
 118 /* --- character device --- */
 119
 120 static int parse_chr(DeviceState *dev, const char *str, void **ptr)
 121 {
 122     CharDriverState *chr = qemu_chr_find(str);
 123     if (chr == NULL) {
 124         return -ENOENT;
 125     }
 126     if (qemu_chr_fe_claim(chr) != 0) {
 127         return -EEXIST;
 128     }
 129     *ptr = chr;
 130     return 0;
 131 }
 132
 133 static void release_chr(Object *obj, const char *name, void *opaque)
 134 {
 135     DeviceState *dev = DEVICE(obj);
 136     Property *prop = opaque;
 137     CharDriverState **ptr = qdev_get_prop_ptr(dev, prop);
 138     CharDriverState *chr = *ptr;
 139
 140     if (chr) {
 141         qemu_chr_add_handlers(chr, NULL, NULL, NULL, NULL);
 142         qemu_chr_fe_release(chr);
 143     }
 144 }
 145
 146
 147 static const char *print_chr(void *ptr)
 148 {
 149     CharDriverState *chr = ptr;
 150
 151     return chr->label ? chr->label : "";
 152 }
 153
 154 static void get_chr(Object *obj, Visitor *v, void *opaque,
 155                     const char *name, Error **errp)
 156 {
 157     get_pointer(obj, v, opaque, print_chr, name, errp);
 158 }
 159
 160 static void set_chr(Object *obj, Visitor *v, void *opaque,
 161                     const char *name, Error **errp)
 162 {
 163     set_pointer(obj, v, opaque, parse_chr, name, errp);
 164 }
 165
 166 PropertyInfo qdev_prop_chr = {
 167     .name  = "chr",
 168     .get   = get_chr,
 169     .set   = set_chr,
 170     .release = release_chr,
 171 };
 172
 173 /* --- netdev device --- */
 174
 175 static int parse_netdev(DeviceState *dev, const char *str, void **ptr)
 176 {
 177     NICPeers *peers_ptr = (NICPeers *)ptr;
 178     NICConf *conf = container_of(peers_ptr, NICConf, peers);
 179     NetClientState **ncs = peers_ptr->ncs;
 180     NetClientState *peers[MAX_QUEUE_NUM];
 181     int queues, i = 0;
 182     int ret;
 183
 184     queues = qemu_find_net_clients_except(str, peers,
 185                                           NET_CLIENT_OPTIONS_KIND_NIC,
 186                                           MAX_QUEUE_NUM);
 187     if (queues == 0) {
 188         ret = -ENOENT;
 189         goto err;
 190     }
 191
 192     if (queues > MAX_QUEUE_NUM) {
 193         ret = -E2BIG;
 194         goto err;
 195     }
 196
 197     for (i = 0; i < queues; i++) {
 198         if (peers[i] == NULL) {
 199             ret = -ENOENT;
 200             goto err;
 201         }
 202
 203         if (peers[i]->peer) {
 204             ret = -EEXIST;
 205             goto err;
 206         }
 207
 208         ncs[i] = peers[i];
 209         ncs[i]->queue_index = i;
 210     }
 211
 212     conf->queues = queues;
 213
 214     return 0;
 215
 216 err:
 217     return ret;
 218 }
 219
 220 static const char *print_netdev(void *ptr)
 221 {
 222     NetClientState *netdev = ptr;
 223
 224     return netdev->name ? netdev->name : "";
 225 }
 226
 227 static void get_netdev(Object *obj, Visitor *v, void *opaque,
 228                        const char *name, Error **errp)
 229 {
 230     get_pointer(obj, v, opaque, print_netdev, name, errp);
 231 }
 232
 233 static void set_netdev(Object *obj, Visitor *v, void *opaque,
 234                        const char *name, Error **errp)
 235 {
 236     set_pointer(obj, v, opaque, parse_netdev, name, errp);
 237 }
 238
 239 PropertyInfo qdev_prop_netdev = {
 240     .name  = "netdev",
 241     .get   = get_netdev,
 242     .set   = set_netdev,
 243 };
 244
 245 /* --- vlan --- */
 246
 247 static int print_vlan(DeviceState *dev, Property *prop, char *dest, size_t len)
 248 {
 249     NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
 250
 251     if (*ptr) {
 252         int id;
 253         if (!net_hub_id_for_client(*ptr, &id)) {
 254             return snprintf(dest, len, "%d", id);
 255         }
 256     }
 257
 258     return snprintf(dest, len, "<null>");
 259 }
 260
 261 static void get_vlan(Object *obj, Visitor *v, void *opaque,
 262                      const char *name, Error **errp)
 263 {
 264     DeviceState *dev = DEVICE(obj);
 265     Property *prop = opaque;
 266     NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
 267     int32_t id = -1;
 268
 269     if (*ptr) {
 270         int hub_id;
 271         if (!net_hub_id_for_client(*ptr, &hub_id)) {
 272             id = hub_id;
 273         }
 274     }
 275
 276     visit_type_int32(v, &id, name, errp);
 277 }
 278
 279 static void set_vlan(Object *obj, Visitor *v, void *opaque,
 280                      const char *name, Error **errp)
 281 {
 282     DeviceState *dev = DEVICE(obj);
 283     Property *prop = opaque;
 284     NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
 285     NetClientState **ptr = &peers_ptr->ncs[0];
 286     Error *local_err = NULL;
 287     int32_t id;
 288     NetClientState *hubport;
 289
 290     if (dev->realized) {
 291         qdev_prop_set_after_realize(dev, name, errp);
 292         return;
 293     }
 294
 295     visit_type_int32(v, &id, name, &local_err);
 296     if (local_err) {
 297         error_propagate(errp, local_err);
 298         return;
 299     }
 300     if (id == -1) {
 301         *ptr = NULL;
 302         return;
 303     }
 304
 305     hubport = net_hub_port_find(id);
 306     if (!hubport) {
 307         error_set(errp, QERR_INVALID_PARAMETER_VALUE,
 308                   name, prop->info->name);
 309         return;
 310     }
 311     *ptr = hubport;
 312 }
 313
 314 PropertyInfo qdev_prop_vlan = {
 315     .name  = "vlan",
 316     .print = print_vlan,
 317     .get   = get_vlan,
 318     .set   = set_vlan,
 319 };
 320
 321 int qdev_prop_set_drive(DeviceState *dev, const char *name,
 322                         BlockDriverState *value)
 323 {
 324     Error *errp = NULL;
 325     const char *bdrv_name = value ? bdrv_get_device_name(value) : "";
 326     object_property_set_str(OBJECT(dev), bdrv_name,
 327                             name, &errp);
 328     if (errp) {
 329         qerror_report_err(errp);
 330         error_free(errp);
 331         return -1;
 332     }
 333     return 0;
 334 }
 335
 336 void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name,
 337                                 BlockDriverState *value)
 338 {
 339     if (qdev_prop_set_drive(dev, name, value) < 0) {
 340         exit(1);
 341     }
 342 }
 343 void qdev_prop_set_chr(DeviceState *dev, const char *name,
 344                        CharDriverState *value)
 345 {
 346     Error *errp = NULL;
 347     assert(!value || value->label);
 348     object_property_set_str(OBJECT(dev),
 349                             value ? value->label : "", name, &errp);
 350     assert_no_error(errp);
 351 }
 352
 353 void qdev_prop_set_netdev(DeviceState *dev, const char *name,
 354                           NetClientState *value)
 355 {
 356     Error *errp = NULL;
 357     assert(!value || value->name);
 358     object_property_set_str(OBJECT(dev),
 359                             value ? value->name : "", name, &errp);
 360     assert_no_error(errp);
 361 }
 362
 363 void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
 364 {
 365     qdev_prop_set_macaddr(dev, "mac", nd->macaddr.a);
 366     if (nd->netdev) {
 367         qdev_prop_set_netdev(dev, "netdev", nd->netdev);
 368     }
 369     if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
 370         object_property_find(OBJECT(dev), "vectors", NULL)) {
 371         qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
 372     }
 373     nd->instantiated = 1;
 374 }
 375
 376 static int qdev_add_one_global(QemuOpts *opts, void *opaque)
 377 {
 378     GlobalProperty *g;
 379
 380     g = g_malloc0(sizeof(*g));
 381     g->driver   = qemu_opt_get(opts, "driver");
 382     g->property = qemu_opt_get(opts, "property");
 383     g->value    = qemu_opt_get(opts, "value");
 384     qdev_prop_register_global(g);
 385     return 0;
 386 }
 387
 388 void qemu_add_globals(void)
 389 {
 390     qemu_opts_foreach(qemu_find_opts("global"), qdev_add_one_global, NULL, 0);
 391 }