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 "sysemu/char.h"
  21 #include "sysemu/iothread.h"
  22
  23 static void get_pointer(Object *obj, Visitor *v, Property *prop,
  24                         char *(*print)(void *ptr),
  25                         const char *name, Error **errp)
  26 {
  27     DeviceState *dev = DEVICE(obj);
  28     void **ptr = qdev_get_prop_ptr(dev, prop);
  29     char *p;
  30
  31     p = *ptr ? print(*ptr) : g_strdup("");
  32     visit_type_str(v, &p, name, errp);
  33     g_free(p);
  34 }
  35
  36 static void set_pointer(Object *obj, Visitor *v, Property *prop,
  37                         int (*parse)(DeviceState *dev, const char *str,
  38                                      void **ptr),
  39                         const char *name, Error **errp)
  40 {
  41     DeviceState *dev = DEVICE(obj);
  42     Error *local_err = NULL;
  43     void **ptr = qdev_get_prop_ptr(dev, prop);
  44     char *str;
  45     int ret;
  46
  47     if (dev->realized) {
  48         qdev_prop_set_after_realize(dev, name, errp);
  49         return;
  50     }
  51
  52     visit_type_str(v, &str, name, &local_err);
  53     if (local_err) {
  54         error_propagate(errp, local_err);
  55         return;
  56     }
  57     if (!*str) {
  58         g_free(str);
  59         *ptr = NULL;
  60         return;
  61     }
  62     ret = parse(dev, str, ptr);
  63     error_set_from_qdev_prop_error(errp, ret, dev, prop, str);
  64     g_free(str);
  65 }
  66
  67 /* --- drive --- */
  68
  69 static int parse_drive(DeviceState *dev, const char *str, void **ptr)
  70 {
  71     BlockDriverState *bs;
  72
  73     bs = bdrv_find(str);
  74     if (bs == NULL) {
  75         return -ENOENT;
  76     }
  77     if (bdrv_attach_dev(bs, dev) < 0) {
  78         return -EEXIST;
  79     }
  80     *ptr = bs;
  81     return 0;
  82 }
  83
  84 static void release_drive(Object *obj, const char *name, void *opaque)
  85 {
  86     DeviceState *dev = DEVICE(obj);
  87     Property *prop = opaque;
  88     BlockDriverState **ptr = qdev_get_prop_ptr(dev, prop);
  89
  90     if (*ptr) {
  91         bdrv_detach_dev(*ptr, dev);
  92         blockdev_auto_del(*ptr);
  93     }
  94 }
  95
  96 static char *print_drive(void *ptr)
  97 {
  98     return g_strdup(bdrv_get_device_name(ptr));
  99 }
 100
 101 static void get_drive(Object *obj, Visitor *v, void *opaque,
 102                       const char *name, Error **errp)
 103 {
 104     get_pointer(obj, v, opaque, print_drive, name, errp);
 105 }
 106
 107 static void set_drive(Object *obj, Visitor *v, void *opaque,
 108                       const char *name, Error **errp)
 109 {
 110     set_pointer(obj, v, opaque, parse_drive, name, errp);
 111 }
 112
 113 PropertyInfo qdev_prop_drive = {
 114     .name  = "str",
 115     .legacy_name  = "drive",
 116     .get   = get_drive,
 117     .set   = set_drive,
 118     .release = release_drive,
 119 };
 120
 121 /* --- character device --- */
 122
 123 static int parse_chr(DeviceState *dev, const char *str, void **ptr)
 124 {
 125     CharDriverState *chr = qemu_chr_find(str);
 126     if (chr == NULL) {
 127         return -ENOENT;
 128     }
 129     if (qemu_chr_fe_claim(chr) != 0) {
 130         return -EEXIST;
 131     }
 132     *ptr = chr;
 133     return 0;
 134 }
 135
 136 static void release_chr(Object *obj, const char *name, void *opaque)
 137 {
 138     DeviceState *dev = DEVICE(obj);
 139     Property *prop = opaque;
 140     CharDriverState **ptr = qdev_get_prop_ptr(dev, prop);
 141     CharDriverState *chr = *ptr;
 142
 143     if (chr) {
 144         qemu_chr_add_handlers(chr, NULL, NULL, NULL, NULL);
 145         qemu_chr_fe_release(chr);
 146     }
 147 }
 148
 149
 150 static char *print_chr(void *ptr)
 151 {
 152     CharDriverState *chr = ptr;
 153     const char *val = chr->label ? chr->label : "";
 154
 155     return g_strdup(val);
 156 }
 157
 158 static void get_chr(Object *obj, Visitor *v, void *opaque,
 159                     const char *name, Error **errp)
 160 {
 161     get_pointer(obj, v, opaque, print_chr, name, errp);
 162 }
 163
 164 static void set_chr(Object *obj, Visitor *v, void *opaque,
 165                     const char *name, Error **errp)
 166 {
 167     set_pointer(obj, v, opaque, parse_chr, name, errp);
 168 }
 169
 170 PropertyInfo qdev_prop_chr = {
 171     .name  = "str",
 172     .legacy_name  = "chr",
 173     .get   = get_chr,
 174     .set   = set_chr,
 175     .release = release_chr,
 176 };
 177
 178 /* --- netdev device --- */
 179
 180 static int parse_netdev(DeviceState *dev, const char *str, void **ptr)
 181 {
 182     NICPeers *peers_ptr = (NICPeers *)ptr;
 183     NICConf *conf = container_of(peers_ptr, NICConf, peers);
 184     NetClientState **ncs = peers_ptr->ncs;
 185     NetClientState *peers[MAX_QUEUE_NUM];
 186     int queues, i = 0;
 187     int ret;
 188
 189     queues = qemu_find_net_clients_except(str, peers,
 190                                           NET_CLIENT_OPTIONS_KIND_NIC,
 191                                           MAX_QUEUE_NUM);
 192     if (queues == 0) {
 193         ret = -ENOENT;
 194         goto err;
 195     }
 196
 197     if (queues > MAX_QUEUE_NUM) {
 198         ret = -E2BIG;
 199         goto err;
 200     }
 201
 202     for (i = 0; i < queues; i++) {
 203         if (peers[i] == NULL) {
 204             ret = -ENOENT;
 205             goto err;
 206         }
 207
 208         if (peers[i]->peer) {
 209             ret = -EEXIST;
 210             goto err;
 211         }
 212
 213         if (ncs[i]) {
 214             ret = -EINVAL;
 215             goto err;
 216         }
 217
 218         ncs[i] = peers[i];
 219         ncs[i]->queue_index = i;
 220     }
 221
 222     conf->queues = queues;
 223
 224     return 0;
 225
 226 err:
 227     return ret;
 228 }
 229
 230 static char *print_netdev(void *ptr)
 231 {
 232     NetClientState *netdev = ptr;
 233     const char *val = netdev->name ? netdev->name : "";
 234
 235     return g_strdup(val);
 236 }
 237
 238 static void get_netdev(Object *obj, Visitor *v, void *opaque,
 239                        const char *name, Error **errp)
 240 {
 241     get_pointer(obj, v, opaque, print_netdev, name, errp);
 242 }
 243
 244 static void set_netdev(Object *obj, Visitor *v, void *opaque,
 245                        const char *name, Error **errp)
 246 {
 247     set_pointer(obj, v, opaque, parse_netdev, name, errp);
 248 }
 249
 250 PropertyInfo qdev_prop_netdev = {
 251     .name  = "str",
 252     .legacy_name  = "netdev",
 253     .get   = get_netdev,
 254     .set   = set_netdev,
 255 };
 256
 257 /* --- vlan --- */
 258
 259 static int print_vlan(DeviceState *dev, Property *prop, char *dest, size_t len)
 260 {
 261     NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
 262
 263     if (*ptr) {
 264         int id;
 265         if (!net_hub_id_for_client(*ptr, &id)) {
 266             return snprintf(dest, len, "%d", id);
 267         }
 268     }
 269
 270     return snprintf(dest, len, "<null>");
 271 }
 272
 273 static void get_vlan(Object *obj, Visitor *v, void *opaque,
 274                      const char *name, Error **errp)
 275 {
 276     DeviceState *dev = DEVICE(obj);
 277     Property *prop = opaque;
 278     NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
 279     int32_t id = -1;
 280
 281     if (*ptr) {
 282         int hub_id;
 283         if (!net_hub_id_for_client(*ptr, &hub_id)) {
 284             id = hub_id;
 285         }
 286     }
 287
 288     visit_type_int32(v, &id, name, errp);
 289 }
 290
 291 static void set_vlan(Object *obj, Visitor *v, void *opaque,
 292                      const char *name, Error **errp)
 293 {
 294     DeviceState *dev = DEVICE(obj);
 295     Property *prop = opaque;
 296     NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
 297     NetClientState **ptr = &peers_ptr->ncs[0];
 298     Error *local_err = NULL;
 299     int32_t id;
 300     NetClientState *hubport;
 301
 302     if (dev->realized) {
 303         qdev_prop_set_after_realize(dev, name, errp);
 304         return;
 305     }
 306
 307     visit_type_int32(v, &id, name, &local_err);
 308     if (local_err) {
 309         error_propagate(errp, local_err);
 310         return;
 311     }
 312     if (id == -1) {
 313         *ptr = NULL;
 314         return;
 315     }
 316     if (*ptr) {
 317         error_set_from_qdev_prop_error(errp, -EINVAL, dev, prop, name);
 318         return;
 319     }
 320
 321     hubport = net_hub_port_find(id);
 322     if (!hubport) {
 323         error_set(errp, QERR_INVALID_PARAMETER_VALUE,
 324                   name, prop->info->name);
 325         return;
 326     }
 327     *ptr = hubport;
 328 }
 329
 330 PropertyInfo qdev_prop_vlan = {
 331     .name  = "int32",
 332     .legacy_name  = "vlan",
 333     .print = print_vlan,
 334     .get   = get_vlan,
 335     .set   = set_vlan,
 336 };
 337
 338 int qdev_prop_set_drive(DeviceState *dev, const char *name,
 339                         BlockDriverState *value)
 340 {
 341     Error *errp = NULL;
 342     const char *bdrv_name = value ? bdrv_get_device_name(value) : "";
 343     object_property_set_str(OBJECT(dev), bdrv_name,
 344                             name, &errp);
 345     if (errp) {
 346         qerror_report_err(errp);
 347         error_free(errp);
 348         return -1;
 349     }
 350     return 0;
 351 }
 352
 353 void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name,
 354                                 BlockDriverState *value)
 355 {
 356     if (qdev_prop_set_drive(dev, name, value) < 0) {
 357         exit(1);
 358     }
 359 }
 360 void qdev_prop_set_chr(DeviceState *dev, const char *name,
 361                        CharDriverState *value)
 362 {
 363     assert(!value || value->label);
 364     object_property_set_str(OBJECT(dev),
 365                             value ? value->label : "", name, &error_abort);
 366 }
 367
 368 void qdev_prop_set_netdev(DeviceState *dev, const char *name,
 369                           NetClientState *value)
 370 {
 371     assert(!value || value->name);
 372     object_property_set_str(OBJECT(dev),
 373                             value ? value->name : "", name, &error_abort);
 374 }
 375
 376 void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
 377 {
 378     qdev_prop_set_macaddr(dev, "mac", nd->macaddr.a);
 379     if (nd->netdev) {
 380         qdev_prop_set_netdev(dev, "netdev", nd->netdev);
 381     }
 382     if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
 383         object_property_find(OBJECT(dev), "vectors", NULL)) {
 384         qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
 385     }
 386     nd->instantiated = 1;
 387 }
 388
 389 /* --- iothread --- */
 390
 391 static char *print_iothread(void *ptr)
 392 {
 393     return iothread_get_id(ptr);
 394 }
 395
 396 static int parse_iothread(DeviceState *dev, const char *str, void **ptr)
 397 {
 398     IOThread *iothread;
 399
 400     iothread = iothread_find(str);
 401     if (!iothread) {
 402         return -ENOENT;
 403     }
 404     object_ref(OBJECT(iothread));
 405     *ptr = iothread;
 406     return 0;
 407 }
 408
 409 static void get_iothread(Object *obj, struct Visitor *v, void *opaque,
 410                          const char *name, Error **errp)
 411 {
 412     get_pointer(obj, v, opaque, print_iothread, name, errp);
 413 }
 414
 415 static void set_iothread(Object *obj, struct Visitor *v, void *opaque,
 416                          const char *name, Error **errp)
 417 {
 418     set_pointer(obj, v, opaque, parse_iothread, name, errp);
 419 }
 420
 421 static void release_iothread(Object *obj, const char *name, void *opaque)
 422 {
 423     DeviceState *dev = DEVICE(obj);
 424     Property *prop = opaque;
 425     IOThread **ptr = qdev_get_prop_ptr(dev, prop);
 426
 427     if (*ptr) {
 428         object_unref(OBJECT(*ptr));
 429     }
 430 }
 431
 432 PropertyInfo qdev_prop_iothread = {
 433     .name = "iothread",
 434     .get = get_iothread,
 435     .set = set_iothread,
 436     .release = release_iothread,
 437 };
 438
 439 static int qdev_add_one_global(QemuOpts *opts, void *opaque)
 440 {
 441     GlobalProperty *g;
 442
 443     g = g_malloc0(sizeof(*g));
 444     g->driver   = qemu_opt_get(opts, "driver");
 445     g->property = qemu_opt_get(opts, "property");
 446     g->value    = qemu_opt_get(opts, "value");
 447     qdev_prop_register_global(g);
 448     return 0;
 449 }
 450
 451 void qemu_add_globals(void)
 452 {
 453     qemu_opts_foreach(qemu_find_opts("global"), qdev_add_one_global, NULL, 0);
 454 }