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