hw/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-common.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 (chr->avail_connections < 1) {
 127         return -EEXIST;
 128     }
 129     *ptr = chr;
 130     --chr->avail_connections;
 131     return 0;
 132 }
 133
 134 static void release_chr(Object *obj, const char *name, void *opaque)
 135 {
 136     DeviceState *dev = DEVICE(obj);
 137     Property *prop = opaque;
 138     CharDriverState **ptr = qdev_get_prop_ptr(dev, prop);
 139     CharDriverState *chr = *ptr;
 140
 141     if (chr) {
 142         qemu_chr_add_handlers(chr, NULL, NULL, NULL, NULL);
 143         ++chr->avail_connections;
 144     }
 145 }
 146
 147
 148 static const char *print_chr(void *ptr)
 149 {
 150     CharDriverState *chr = ptr;
 151
 152     return chr->label ? chr->label : "";
 153 }
 154
 155 static void get_chr(Object *obj, Visitor *v, void *opaque,
 156                     const char *name, Error **errp)
 157 {
 158     get_pointer(obj, v, opaque, print_chr, name, errp);
 159 }
 160
 161 static void set_chr(Object *obj, Visitor *v, void *opaque,
 162                     const char *name, Error **errp)
 163 {
 164     set_pointer(obj, v, opaque, parse_chr, name, errp);
 165 }
 166
 167 PropertyInfo qdev_prop_chr = {
 168     .name  = "chr",
 169     .get   = get_chr,
 170     .set   = set_chr,
 171     .release = release_chr,
 172 };
 173
 174 /* --- netdev device --- */
 175
 176 static int parse_netdev(DeviceState *dev, const char *str, void **ptr)
 177 {
 178     NICPeers *peers_ptr = (NICPeers *)ptr;
 179     NICConf *conf = container_of(peers_ptr, NICConf, peers);
 180     NetClientState **ncs = peers_ptr->ncs;
 181     NetClientState *peers[MAX_QUEUE_NUM];
 182     int queues, i = 0;
 183     int ret;
 184
 185     queues = qemu_find_net_clients_except(str, peers,
 186                                           NET_CLIENT_OPTIONS_KIND_NIC,
 187                                           MAX_QUEUE_NUM);
 188     if (queues == 0) {
 189         ret = -ENOENT;
 190         goto err;
 191     }
 192
 193     if (queues > MAX_QUEUE_NUM) {
 194         ret = -E2BIG;
 195         goto err;
 196     }
 197
 198     for (i = 0; i < queues; i++) {
 199         if (peers[i] == NULL) {
 200             ret = -ENOENT;
 201             goto err;
 202         }
 203
 204         if (peers[i]->peer) {
 205             ret = -EEXIST;
 206             goto err;
 207         }
 208
 209         ncs[i] = peers[i];
 210         ncs[i]->queue_index = i;
 211     }
 212
 213     conf->queues = queues;
 214
 215     return 0;
 216
 217 err:
 218     return ret;
 219 }
 220
 221 static const char *print_netdev(void *ptr)
 222 {
 223     NetClientState *netdev = ptr;
 224
 225     return netdev->name ? netdev->name : "";
 226 }
 227
 228 static void get_netdev(Object *obj, Visitor *v, void *opaque,
 229                        const char *name, Error **errp)
 230 {
 231     get_pointer(obj, v, opaque, print_netdev, name, errp);
 232 }
 233
 234 static void set_netdev(Object *obj, Visitor *v, void *opaque,
 235                        const char *name, Error **errp)
 236 {
 237     set_pointer(obj, v, opaque, parse_netdev, name, errp);
 238 }
 239
 240 PropertyInfo qdev_prop_netdev = {
 241     .name  = "netdev",
 242     .get   = get_netdev,
 243     .set   = set_netdev,
 244 };
 245
 246 /* --- vlan --- */
 247
 248 static int print_vlan(DeviceState *dev, Property *prop, char *dest, size_t len)
 249 {
 250     NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
 251
 252     if (*ptr) {
 253         int id;
 254         if (!net_hub_id_for_client(*ptr, &id)) {
 255             return snprintf(dest, len, "%d", id);
 256         }
 257     }
 258
 259     return snprintf(dest, len, "<null>");
 260 }
 261
 262 static void get_vlan(Object *obj, Visitor *v, void *opaque,
 263                      const char *name, Error **errp)
 264 {
 265     DeviceState *dev = DEVICE(obj);
 266     Property *prop = opaque;
 267     NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
 268     int32_t id = -1;
 269
 270     if (*ptr) {
 271         int hub_id;
 272         if (!net_hub_id_for_client(*ptr, &hub_id)) {
 273             id = hub_id;
 274         }
 275     }
 276
 277     visit_type_int32(v, &id, name, errp);
 278 }
 279
 280 static void set_vlan(Object *obj, Visitor *v, void *opaque,
 281                      const char *name, Error **errp)
 282 {
 283     DeviceState *dev = DEVICE(obj);
 284     Property *prop = opaque;
 285     NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
 286     NetClientState **ptr = &peers_ptr->ncs[0];
 287     Error *local_err = NULL;
 288     int32_t id;
 289     NetClientState *hubport;
 290
 291     if (dev->realized) {
 292         qdev_prop_set_after_realize(dev, name, errp);
 293         return;
 294     }
 295
 296     visit_type_int32(v, &id, name, &local_err);
 297     if (local_err) {
 298         error_propagate(errp, local_err);
 299         return;
 300     }
 301     if (id == -1) {
 302         *ptr = NULL;
 303         return;
 304     }
 305
 306     hubport = net_hub_port_find(id);
 307     if (!hubport) {
 308         error_set(errp, QERR_INVALID_PARAMETER_VALUE,
 309                   name, prop->info->name);
 310         return;
 311     }
 312     *ptr = hubport;
 313 }
 314
 315 PropertyInfo qdev_prop_vlan = {
 316     .name  = "vlan",
 317     .print = print_vlan,
 318     .get   = get_vlan,
 319     .set   = set_vlan,
 320 };
 321
 322 int qdev_prop_set_drive(DeviceState *dev, const char *name,
 323                         BlockDriverState *value)
 324 {
 325     Error *errp = NULL;
 326     const char *bdrv_name = value ? bdrv_get_device_name(value) : "";
 327     object_property_set_str(OBJECT(dev), bdrv_name,
 328                             name, &errp);
 329     if (errp) {
 330         qerror_report_err(errp);
 331         error_free(errp);
 332         return -1;
 333     }
 334     return 0;
 335 }
 336
 337 void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name,
 338                                 BlockDriverState *value)
 339 {
 340     if (qdev_prop_set_drive(dev, name, value) < 0) {
 341         exit(1);
 342     }
 343 }
 344 void qdev_prop_set_chr(DeviceState *dev, const char *name,
 345                        CharDriverState *value)
 346 {
 347     Error *errp = NULL;
 348     assert(!value || value->label);
 349     object_property_set_str(OBJECT(dev),
 350                             value ? value->label : "", name, &errp);
 351     assert_no_error(errp);
 352 }
 353
 354 void qdev_prop_set_netdev(DeviceState *dev, const char *name,
 355                           NetClientState *value)
 356 {
 357     Error *errp = NULL;
 358     assert(!value || value->name);
 359     object_property_set_str(OBJECT(dev),
 360                             value ? value->name : "", name, &errp);
 361     assert_no_error(errp);
 362 }
 363
 364 void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
 365 {
 366     qdev_prop_set_macaddr(dev, "mac", nd->macaddr.a);
 367     if (nd->netdev) {
 368         qdev_prop_set_netdev(dev, "netdev", nd->netdev);
 369     }
 370     if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
 371         object_property_find(OBJECT(dev), "vectors", NULL)) {
 372         qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
 373     }
 374     nd->instantiated = 1;
 375 }
 376
 377 static int qdev_add_one_global(QemuOpts *opts, void *opaque)
 378 {
 379     GlobalProperty *g;
 380
 381     g = g_malloc0(sizeof(*g));
 382     g->driver   = qemu_opt_get(opts, "driver");
 383     g->property = qemu_opt_get(opts, "property");
 384     g->value    = qemu_opt_get(opts, "value");
 385     qdev_prop_register_global(g);
 386     return 0;
 387 }
 388
 389 void qemu_add_globals(void)
 390 {
 391     qemu_opts_foreach(qemu_find_opts("global"), qdev_add_one_global, NULL, 0);
 392 }