hw/core/qdev-properties.c

   1 #include "net/net.h"
   2 #include "hw/qdev.h"
   3 #include "qapi/qmp/qerror.h"
   4 #include "sysemu/blockdev.h"
   5 #include "hw/block/block.h"
   6 #include "net/hub.h"
   7 #include "qapi/visitor.h"
   8 #include "sysemu/char.h"
   9
  10 void qdev_prop_set_after_realize(DeviceState *dev, const char *name,
  11                                   Error **errp)
  12 {
  13     if (dev->id) {
  14         error_setg(errp, "Attempt to set property '%s' on device '%s' "
  15                    "(type '%s') after it was realized", name, dev->id,
  16                    object_get_typename(OBJECT(dev)));
  17     } else {
  18         error_setg(errp, "Attempt to set property '%s' on anonymous device "
  19                    "(type '%s') after it was realized", name,
  20                    object_get_typename(OBJECT(dev)));
  21     }
  22 }
  23
  24 void *qdev_get_prop_ptr(DeviceState *dev, Property *prop)
  25 {
  26     void *ptr = dev;
  27     ptr += prop->offset;
  28     return ptr;
  29 }
  30
  31 static void get_enum(Object *obj, Visitor *v, void *opaque,
  32                      const char *name, Error **errp)
  33 {
  34     DeviceState *dev = DEVICE(obj);
  35     Property *prop = opaque;
  36     int *ptr = qdev_get_prop_ptr(dev, prop);
  37
  38     visit_type_enum(v, ptr, prop->info->enum_table,
  39                     prop->info->name, prop->name, errp);
  40 }
  41
  42 static void set_enum(Object *obj, Visitor *v, void *opaque,
  43                      const char *name, Error **errp)
  44 {
  45     DeviceState *dev = DEVICE(obj);
  46     Property *prop = opaque;
  47     int *ptr = qdev_get_prop_ptr(dev, prop);
  48
  49     if (dev->realized) {
  50         qdev_prop_set_after_realize(dev, name, errp);
  51         return;
  52     }
  53
  54     visit_type_enum(v, ptr, prop->info->enum_table,
  55                     prop->info->name, prop->name, errp);
  56 }
  57
  58 /* Bit */
  59
  60 static uint32_t qdev_get_prop_mask(Property *prop)
  61 {
  62     assert(prop->info == &qdev_prop_bit);
  63     return 0x1 << prop->bitnr;
  64 }
  65
  66 static void bit_prop_set(DeviceState *dev, Property *props, bool val)
  67 {
  68     uint32_t *p = qdev_get_prop_ptr(dev, props);
  69     uint32_t mask = qdev_get_prop_mask(props);
  70     if (val) {
  71         *p |= mask;
  72     } else {
  73         *p &= ~mask;
  74     }
  75 }
  76
  77 static void prop_get_bit(Object *obj, Visitor *v, void *opaque,
  78                     const char *name, Error **errp)
  79 {
  80     DeviceState *dev = DEVICE(obj);
  81     Property *prop = opaque;
  82     uint32_t *p = qdev_get_prop_ptr(dev, prop);
  83     bool value = (*p & qdev_get_prop_mask(prop)) != 0;
  84
  85     visit_type_bool(v, &value, name, errp);
  86 }
  87
  88 static void prop_set_bit(Object *obj, Visitor *v, void *opaque,
  89                     const char *name, Error **errp)
  90 {
  91     DeviceState *dev = DEVICE(obj);
  92     Property *prop = opaque;
  93     Error *local_err = NULL;
  94     bool value;
  95
  96     if (dev->realized) {
  97         qdev_prop_set_after_realize(dev, name, errp);
  98         return;
  99     }
 100
 101     visit_type_bool(v, &value, name, &local_err);
 102     if (local_err) {
 103         error_propagate(errp, local_err);
 104         return;
 105     }
 106     bit_prop_set(dev, prop, value);
 107 }
 108
 109 PropertyInfo qdev_prop_bit = {
 110     .name  = "bool",
 111     .legacy_name  = "on/off",
 112     .get   = prop_get_bit,
 113     .set   = prop_set_bit,
 114 };
 115
 116 /* --- bool --- */
 117
 118 static void get_bool(Object *obj, Visitor *v, void *opaque,
 119                      const char *name, Error **errp)
 120 {
 121     DeviceState *dev = DEVICE(obj);
 122     Property *prop = opaque;
 123     bool *ptr = qdev_get_prop_ptr(dev, prop);
 124
 125     visit_type_bool(v, ptr, name, errp);
 126 }
 127
 128 static void set_bool(Object *obj, Visitor *v, void *opaque,
 129                      const char *name, Error **errp)
 130 {
 131     DeviceState *dev = DEVICE(obj);
 132     Property *prop = opaque;
 133     bool *ptr = qdev_get_prop_ptr(dev, prop);
 134
 135     if (dev->realized) {
 136         qdev_prop_set_after_realize(dev, name, errp);
 137         return;
 138     }
 139
 140     visit_type_bool(v, ptr, name, errp);
 141 }
 142
 143 PropertyInfo qdev_prop_bool = {
 144     .name  = "bool",
 145     .get   = get_bool,
 146     .set   = set_bool,
 147 };
 148
 149 /* --- 8bit integer --- */
 150
 151 static void get_uint8(Object *obj, Visitor *v, void *opaque,
 152                       const char *name, Error **errp)
 153 {
 154     DeviceState *dev = DEVICE(obj);
 155     Property *prop = opaque;
 156     uint8_t *ptr = qdev_get_prop_ptr(dev, prop);
 157
 158     visit_type_uint8(v, ptr, name, errp);
 159 }
 160
 161 static void set_uint8(Object *obj, Visitor *v, void *opaque,
 162                       const char *name, Error **errp)
 163 {
 164     DeviceState *dev = DEVICE(obj);
 165     Property *prop = opaque;
 166     uint8_t *ptr = qdev_get_prop_ptr(dev, prop);
 167
 168     if (dev->realized) {
 169         qdev_prop_set_after_realize(dev, name, errp);
 170         return;
 171     }
 172
 173     visit_type_uint8(v, ptr, name, errp);
 174 }
 175
 176 PropertyInfo qdev_prop_uint8 = {
 177     .name  = "uint8",
 178     .get   = get_uint8,
 179     .set   = set_uint8,
 180 };
 181
 182 /* --- 16bit integer --- */
 183
 184 static void get_uint16(Object *obj, Visitor *v, void *opaque,
 185                        const char *name, Error **errp)
 186 {
 187     DeviceState *dev = DEVICE(obj);
 188     Property *prop = opaque;
 189     uint16_t *ptr = qdev_get_prop_ptr(dev, prop);
 190
 191     visit_type_uint16(v, ptr, name, errp);
 192 }
 193
 194 static void set_uint16(Object *obj, Visitor *v, void *opaque,
 195                        const char *name, Error **errp)
 196 {
 197     DeviceState *dev = DEVICE(obj);
 198     Property *prop = opaque;
 199     uint16_t *ptr = qdev_get_prop_ptr(dev, prop);
 200
 201     if (dev->realized) {
 202         qdev_prop_set_after_realize(dev, name, errp);
 203         return;
 204     }
 205
 206     visit_type_uint16(v, ptr, name, errp);
 207 }
 208
 209 PropertyInfo qdev_prop_uint16 = {
 210     .name  = "uint16",
 211     .get   = get_uint16,
 212     .set   = set_uint16,
 213 };
 214
 215 /* --- 32bit integer --- */
 216
 217 static void get_uint32(Object *obj, Visitor *v, void *opaque,
 218                        const char *name, Error **errp)
 219 {
 220     DeviceState *dev = DEVICE(obj);
 221     Property *prop = opaque;
 222     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 223
 224     visit_type_uint32(v, ptr, name, errp);
 225 }
 226
 227 static void set_uint32(Object *obj, Visitor *v, void *opaque,
 228                        const char *name, Error **errp)
 229 {
 230     DeviceState *dev = DEVICE(obj);
 231     Property *prop = opaque;
 232     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 233
 234     if (dev->realized) {
 235         qdev_prop_set_after_realize(dev, name, errp);
 236         return;
 237     }
 238
 239     visit_type_uint32(v, ptr, name, errp);
 240 }
 241
 242 static void get_int32(Object *obj, Visitor *v, void *opaque,
 243                       const char *name, Error **errp)
 244 {
 245     DeviceState *dev = DEVICE(obj);
 246     Property *prop = opaque;
 247     int32_t *ptr = qdev_get_prop_ptr(dev, prop);
 248
 249     visit_type_int32(v, ptr, name, errp);
 250 }
 251
 252 static void set_int32(Object *obj, Visitor *v, void *opaque,
 253                       const char *name, Error **errp)
 254 {
 255     DeviceState *dev = DEVICE(obj);
 256     Property *prop = opaque;
 257     int32_t *ptr = qdev_get_prop_ptr(dev, prop);
 258
 259     if (dev->realized) {
 260         qdev_prop_set_after_realize(dev, name, errp);
 261         return;
 262     }
 263
 264     visit_type_int32(v, ptr, name, errp);
 265 }
 266
 267 PropertyInfo qdev_prop_uint32 = {
 268     .name  = "uint32",
 269     .get   = get_uint32,
 270     .set   = set_uint32,
 271 };
 272
 273 PropertyInfo qdev_prop_int32 = {
 274     .name  = "int32",
 275     .get   = get_int32,
 276     .set   = set_int32,
 277 };
 278
 279 /* --- 64bit integer --- */
 280
 281 static void get_uint64(Object *obj, Visitor *v, void *opaque,
 282                        const char *name, Error **errp)
 283 {
 284     DeviceState *dev = DEVICE(obj);
 285     Property *prop = opaque;
 286     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
 287
 288     visit_type_uint64(v, ptr, name, errp);
 289 }
 290
 291 static void set_uint64(Object *obj, Visitor *v, void *opaque,
 292                        const char *name, Error **errp)
 293 {
 294     DeviceState *dev = DEVICE(obj);
 295     Property *prop = opaque;
 296     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
 297
 298     if (dev->realized) {
 299         qdev_prop_set_after_realize(dev, name, errp);
 300         return;
 301     }
 302
 303     visit_type_uint64(v, ptr, name, errp);
 304 }
 305
 306 PropertyInfo qdev_prop_uint64 = {
 307     .name  = "uint64",
 308     .get   = get_uint64,
 309     .set   = set_uint64,
 310 };
 311
 312 /* --- string --- */
 313
 314 static void release_string(Object *obj, const char *name, void *opaque)
 315 {
 316     Property *prop = opaque;
 317     g_free(*(char **)qdev_get_prop_ptr(DEVICE(obj), prop));
 318 }
 319
 320 static void get_string(Object *obj, Visitor *v, void *opaque,
 321                        const char *name, Error **errp)
 322 {
 323     DeviceState *dev = DEVICE(obj);
 324     Property *prop = opaque;
 325     char **ptr = qdev_get_prop_ptr(dev, prop);
 326
 327     if (!*ptr) {
 328         char *str = (char *)"";
 329         visit_type_str(v, &str, name, errp);
 330     } else {
 331         visit_type_str(v, ptr, name, errp);
 332     }
 333 }
 334
 335 static void set_string(Object *obj, Visitor *v, void *opaque,
 336                        const char *name, Error **errp)
 337 {
 338     DeviceState *dev = DEVICE(obj);
 339     Property *prop = opaque;
 340     char **ptr = qdev_get_prop_ptr(dev, prop);
 341     Error *local_err = NULL;
 342     char *str;
 343
 344     if (dev->realized) {
 345         qdev_prop_set_after_realize(dev, name, errp);
 346         return;
 347     }
 348
 349     visit_type_str(v, &str, name, &local_err);
 350     if (local_err) {
 351         error_propagate(errp, local_err);
 352         return;
 353     }
 354     if (*ptr) {
 355         g_free(*ptr);
 356     }
 357     *ptr = str;
 358 }
 359
 360 PropertyInfo qdev_prop_string = {
 361     .name  = "str",
 362     .release = release_string,
 363     .get   = get_string,
 364     .set   = set_string,
 365 };
 366
 367 /* --- pointer --- */
 368
 369 /* Not a proper property, just for dirty hacks.  TODO Remove it!  */
 370 PropertyInfo qdev_prop_ptr = {
 371     .name  = "ptr",
 372 };
 373
 374 /* --- mac address --- */
 375
 376 /*
 377  * accepted syntax versions:
 378  *   01:02:03:04:05:06
 379  *   01-02-03-04-05-06
 380  */
 381 static void get_mac(Object *obj, Visitor *v, void *opaque,
 382                     const char *name, Error **errp)
 383 {
 384     DeviceState *dev = DEVICE(obj);
 385     Property *prop = opaque;
 386     MACAddr *mac = qdev_get_prop_ptr(dev, prop);
 387     char buffer[2 * 6 + 5 + 1];
 388     char *p = buffer;
 389
 390     snprintf(buffer, sizeof(buffer), "%02x:%02x:%02x:%02x:%02x:%02x",
 391              mac->a[0], mac->a[1], mac->a[2],
 392              mac->a[3], mac->a[4], mac->a[5]);
 393
 394     visit_type_str(v, &p, name, errp);
 395 }
 396
 397 static void set_mac(Object *obj, Visitor *v, void *opaque,
 398                     const char *name, Error **errp)
 399 {
 400     DeviceState *dev = DEVICE(obj);
 401     Property *prop = opaque;
 402     MACAddr *mac = qdev_get_prop_ptr(dev, prop);
 403     Error *local_err = NULL;
 404     int i, pos;
 405     char *str, *p;
 406
 407     if (dev->realized) {
 408         qdev_prop_set_after_realize(dev, name, errp);
 409         return;
 410     }
 411
 412     visit_type_str(v, &str, name, &local_err);
 413     if (local_err) {
 414         error_propagate(errp, local_err);
 415         return;
 416     }
 417
 418     for (i = 0, pos = 0; i < 6; i++, pos += 3) {
 419         if (!qemu_isxdigit(str[pos])) {
 420             goto inval;
 421         }
 422         if (!qemu_isxdigit(str[pos+1])) {
 423             goto inval;
 424         }
 425         if (i == 5) {
 426             if (str[pos+2] != '\0') {
 427                 goto inval;
 428             }
 429         } else {
 430             if (str[pos+2] != ':' && str[pos+2] != '-') {
 431                 goto inval;
 432             }
 433         }
 434         mac->a[i] = strtol(str+pos, &p, 16);
 435     }
 436     g_free(str);
 437     return;
 438
 439 inval:
 440     error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str);
 441     g_free(str);
 442 }
 443
 444 PropertyInfo qdev_prop_macaddr = {
 445     .name  = "str",
 446     .legacy_name  = "macaddr",
 447     .get   = get_mac,
 448     .set   = set_mac,
 449 };
 450
 451 /* --- lost tick policy --- */
 452
 453 QEMU_BUILD_BUG_ON(sizeof(LostTickPolicy) != sizeof(int));
 454
 455 PropertyInfo qdev_prop_losttickpolicy = {
 456     .name  = "LostTickPolicy",
 457     .enum_table  = LostTickPolicy_lookup,
 458     .get   = get_enum,
 459     .set   = set_enum,
 460 };
 461
 462 /* --- BIOS CHS translation */
 463
 464 QEMU_BUILD_BUG_ON(sizeof(BiosAtaTranslation) != sizeof(int));
 465
 466 PropertyInfo qdev_prop_bios_chs_trans = {
 467     .name = "BiosAtaTranslation",
 468     .legacy_name = "bios-chs-trans",
 469     .enum_table = BiosAtaTranslation_lookup,
 470     .get = get_enum,
 471     .set = set_enum,
 472 };
 473
 474 /* --- pci address --- */
 475
 476 /*
 477  * bus-local address, i.e. "$slot" or "$slot.$fn"
 478  */
 479 static void set_pci_devfn(Object *obj, Visitor *v, void *opaque,
 480                           const char *name, Error **errp)
 481 {
 482     DeviceState *dev = DEVICE(obj);
 483     Property *prop = opaque;
 484     int32_t value, *ptr = qdev_get_prop_ptr(dev, prop);
 485     unsigned int slot, fn, n;
 486     Error *local_err = NULL;
 487     char *str;
 488
 489     if (dev->realized) {
 490         qdev_prop_set_after_realize(dev, name, errp);
 491         return;
 492     }
 493
 494     visit_type_str(v, &str, name, &local_err);
 495     if (local_err) {
 496         error_free(local_err);
 497         local_err = NULL;
 498         visit_type_int32(v, &value, name, &local_err);
 499         if (local_err) {
 500             error_propagate(errp, local_err);
 501         } else if (value < -1 || value > 255) {
 502             error_set(errp, QERR_INVALID_PARAMETER_VALUE, name ? name : "null",
 503                       "pci_devfn");
 504         } else {
 505             *ptr = value;
 506         }
 507         return;
 508     }
 509
 510     if (sscanf(str, "%x.%x%n", &slot, &fn, &n) != 2) {
 511         fn = 0;
 512         if (sscanf(str, "%x%n", &slot, &n) != 1) {
 513             goto invalid;
 514         }
 515     }
 516     if (str[n] != '\0' || fn > 7 || slot > 31) {
 517         goto invalid;
 518     }
 519     *ptr = slot << 3 | fn;
 520     g_free(str);
 521     return;
 522
 523 invalid:
 524     error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str);
 525     g_free(str);
 526 }
 527
 528 static int print_pci_devfn(DeviceState *dev, Property *prop, char *dest,
 529                            size_t len)
 530 {
 531     int32_t *ptr = qdev_get_prop_ptr(dev, prop);
 532
 533     if (*ptr == -1) {
 534         return snprintf(dest, len, "<unset>");
 535     } else {
 536         return snprintf(dest, len, "%02x.%x", *ptr >> 3, *ptr & 7);
 537     }
 538 }
 539
 540 PropertyInfo qdev_prop_pci_devfn = {
 541     .name  = "int32",
 542     .legacy_name  = "pci-devfn",
 543     .print = print_pci_devfn,
 544     .get   = get_int32,
 545     .set   = set_pci_devfn,
 546 };
 547
 548 /* --- blocksize --- */
 549
 550 static void set_blocksize(Object *obj, Visitor *v, void *opaque,
 551                           const char *name, Error **errp)
 552 {
 553     DeviceState *dev = DEVICE(obj);
 554     Property *prop = opaque;
 555     uint16_t value, *ptr = qdev_get_prop_ptr(dev, prop);
 556     Error *local_err = NULL;
 557     const int64_t min = 512;
 558     const int64_t max = 32768;
 559
 560     if (dev->realized) {
 561         qdev_prop_set_after_realize(dev, name, errp);
 562         return;
 563     }
 564
 565     visit_type_uint16(v, &value, name, &local_err);
 566     if (local_err) {
 567         error_propagate(errp, local_err);
 568         return;
 569     }
 570     if (value < min || value > max) {
 571         error_set(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE,
 572                   dev->id?:"", name, (int64_t)value, min, max);
 573         return;
 574     }
 575
 576     /* We rely on power-of-2 blocksizes for bitmasks */
 577     if ((value & (value - 1)) != 0) {
 578         error_set(errp, QERR_PROPERTY_VALUE_NOT_POWER_OF_2,
 579                   dev->id?:"", name, (int64_t)value);
 580         return;
 581     }
 582
 583     *ptr = value;
 584 }
 585
 586 PropertyInfo qdev_prop_blocksize = {
 587     .name  = "uint16",
 588     .legacy_name  = "blocksize",
 589     .get   = get_uint16,
 590     .set   = set_blocksize,
 591 };
 592
 593 /* --- pci host address --- */
 594
 595 static void get_pci_host_devaddr(Object *obj, Visitor *v, void *opaque,
 596                                  const char *name, Error **errp)
 597 {
 598     DeviceState *dev = DEVICE(obj);
 599     Property *prop = opaque;
 600     PCIHostDeviceAddress *addr = qdev_get_prop_ptr(dev, prop);
 601     char buffer[] = "xxxx:xx:xx.x";
 602     char *p = buffer;
 603     int rc = 0;
 604
 605     rc = snprintf(buffer, sizeof(buffer), "%04x:%02x:%02x.%d",
 606                   addr->domain, addr->bus, addr->slot, addr->function);
 607     assert(rc == sizeof(buffer) - 1);
 608
 609     visit_type_str(v, &p, name, errp);
 610 }
 611
 612 /*
 613  * Parse [<domain>:]<bus>:<slot>.<func>
 614  *   if <domain> is not supplied, it's assumed to be 0.
 615  */
 616 static void set_pci_host_devaddr(Object *obj, Visitor *v, void *opaque,
 617                                  const char *name, Error **errp)
 618 {
 619     DeviceState *dev = DEVICE(obj);
 620     Property *prop = opaque;
 621     PCIHostDeviceAddress *addr = qdev_get_prop_ptr(dev, prop);
 622     Error *local_err = NULL;
 623     char *str, *p;
 624     char *e;
 625     unsigned long val;
 626     unsigned long dom = 0, bus = 0;
 627     unsigned int slot = 0, func = 0;
 628
 629     if (dev->realized) {
 630         qdev_prop_set_after_realize(dev, name, errp);
 631         return;
 632     }
 633
 634     visit_type_str(v, &str, name, &local_err);
 635     if (local_err) {
 636         error_propagate(errp, local_err);
 637         return;
 638     }
 639
 640     p = str;
 641     val = strtoul(p, &e, 16);
 642     if (e == p || *e != ':') {
 643         goto inval;
 644     }
 645     bus = val;
 646
 647     p = e + 1;
 648     val = strtoul(p, &e, 16);
 649     if (e == p) {
 650         goto inval;
 651     }
 652     if (*e == ':') {
 653         dom = bus;
 654         bus = val;
 655         p = e + 1;
 656         val = strtoul(p, &e, 16);
 657         if (e == p) {
 658             goto inval;
 659         }
 660     }
 661     slot = val;
 662
 663     if (*e != '.') {
 664         goto inval;
 665     }
 666     p = e + 1;
 667     val = strtoul(p, &e, 10);
 668     if (e == p) {
 669         goto inval;
 670     }
 671     func = val;
 672
 673     if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7) {
 674         goto inval;
 675     }
 676
 677     if (*e) {
 678         goto inval;
 679     }
 680
 681     addr->domain = dom;
 682     addr->bus = bus;
 683     addr->slot = slot;
 684     addr->function = func;
 685
 686     g_free(str);
 687     return;
 688
 689 inval:
 690     error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str);
 691     g_free(str);
 692 }
 693
 694 PropertyInfo qdev_prop_pci_host_devaddr = {
 695     .name = "str",
 696     .legacy_name = "pci-host-devaddr",
 697     .get = get_pci_host_devaddr,
 698     .set = set_pci_host_devaddr,
 699 };
 700
 701 /* --- support for array properties --- */
 702
 703 /* Used as an opaque for the object properties we add for each
 704  * array element. Note that the struct Property must be first
 705  * in the struct so that a pointer to this works as the opaque
 706  * for the underlying element's property hooks as well as for
 707  * our own release callback.
 708  */
 709 typedef struct {
 710     struct Property prop;
 711     char *propname;
 712     ObjectPropertyRelease *release;
 713 } ArrayElementProperty;
 714
 715 /* object property release callback for array element properties:
 716  * we call the underlying element's property release hook, and
 717  * then free the memory we allocated when we added the property.
 718  */
 719 static void array_element_release(Object *obj, const char *name, void *opaque)
 720 {
 721     ArrayElementProperty *p = opaque;
 722     if (p->release) {
 723         p->release(obj, name, opaque);
 724     }
 725     g_free(p->propname);
 726     g_free(p);
 727 }
 728
 729 static void set_prop_arraylen(Object *obj, Visitor *v, void *opaque,
 730                               const char *name, Error **errp)
 731 {
 732     /* Setter for the property which defines the length of a
 733      * variable-sized property array. As well as actually setting the
 734      * array-length field in the device struct, we have to create the
 735      * array itself and dynamically add the corresponding properties.
 736      */
 737     DeviceState *dev = DEVICE(obj);
 738     Property *prop = opaque;
 739     uint32_t *alenptr = qdev_get_prop_ptr(dev, prop);
 740     void **arrayptr = (void *)dev + prop->arrayoffset;
 741     void *eltptr;
 742     const char *arrayname;
 743     int i;
 744
 745     if (dev->realized) {
 746         qdev_prop_set_after_realize(dev, name, errp);
 747         return;
 748     }
 749     if (*alenptr) {
 750         error_setg(errp, "array size property %s may not be set more than once",
 751                    name);
 752         return;
 753     }
 754     visit_type_uint32(v, alenptr, name, errp);
 755     if (error_is_set(errp)) {
 756         return;
 757     }
 758     if (!*alenptr) {
 759         return;
 760     }
 761
 762     /* DEFINE_PROP_ARRAY guarantees that name should start with this prefix;
 763      * strip it off so we can get the name of the array itself.
 764      */
 765     assert(strncmp(name, PROP_ARRAY_LEN_PREFIX,
 766                    strlen(PROP_ARRAY_LEN_PREFIX)) == 0);
 767     arrayname = name + strlen(PROP_ARRAY_LEN_PREFIX);
 768
 769     /* Note that it is the responsibility of the individual device's deinit
 770      * to free the array proper.
 771      */
 772     *arrayptr = eltptr = g_malloc0(*alenptr * prop->arrayfieldsize);
 773     for (i = 0; i < *alenptr; i++, eltptr += prop->arrayfieldsize) {
 774         char *propname = g_strdup_printf("%s[%d]", arrayname, i);
 775         ArrayElementProperty *arrayprop = g_new0(ArrayElementProperty, 1);
 776         arrayprop->release = prop->arrayinfo->release;
 777         arrayprop->propname = propname;
 778         arrayprop->prop.info = prop->arrayinfo;
 779         arrayprop->prop.name = propname;
 780         /* This ugly piece of pointer arithmetic sets up the offset so
 781          * that when the underlying get/set hooks call qdev_get_prop_ptr
 782          * they get the right answer despite the array element not actually
 783          * being inside the device struct.
 784          */
 785         arrayprop->prop.offset = eltptr - (void *)dev;
 786         assert(qdev_get_prop_ptr(dev, &arrayprop->prop) == eltptr);
 787         object_property_add(obj, propname,
 788                             arrayprop->prop.info->name,
 789                             arrayprop->prop.info->get,
 790                             arrayprop->prop.info->set,
 791                             array_element_release,
 792                             arrayprop, errp);
 793         if (error_is_set(errp)) {
 794             return;
 795         }
 796     }
 797 }
 798
 799 PropertyInfo qdev_prop_arraylen = {
 800     .name = "uint32",
 801     .get = get_uint32,
 802     .set = set_prop_arraylen,
 803 };
 804
 805 /* --- public helpers --- */
 806
 807 static Property *qdev_prop_walk(Property *props, const char *name)
 808 {
 809     if (!props) {
 810         return NULL;
 811     }
 812     while (props->name) {
 813         if (strcmp(props->name, name) == 0) {
 814             return props;
 815         }
 816         props++;
 817     }
 818     return NULL;
 819 }
 820
 821 static Property *qdev_prop_find(DeviceState *dev, const char *name)
 822 {
 823     ObjectClass *class;
 824     Property *prop;
 825
 826     /* device properties */
 827     class = object_get_class(OBJECT(dev));
 828     do {
 829         prop = qdev_prop_walk(DEVICE_CLASS(class)->props, name);
 830         if (prop) {
 831             return prop;
 832         }
 833         class = object_class_get_parent(class);
 834     } while (class != object_class_by_name(TYPE_DEVICE));
 835
 836     return NULL;
 837 }
 838
 839 void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev,
 840                                     Property *prop, const char *value)
 841 {
 842     switch (ret) {
 843     case -EEXIST:
 844         error_set(errp, QERR_PROPERTY_VALUE_IN_USE,
 845                   object_get_typename(OBJECT(dev)), prop->name, value);
 846         break;
 847     default:
 848     case -EINVAL:
 849         error_set(errp, QERR_PROPERTY_VALUE_BAD,
 850                   object_get_typename(OBJECT(dev)), prop->name, value);
 851         break;
 852     case -ENOENT:
 853         error_set(errp, QERR_PROPERTY_VALUE_NOT_FOUND,
 854                   object_get_typename(OBJECT(dev)), prop->name, value);
 855         break;
 856     case 0:
 857         break;
 858     }
 859 }
 860
 861 void qdev_prop_set_bit(DeviceState *dev, const char *name, bool value)
 862 {
 863     object_property_set_bool(OBJECT(dev), value, name, &error_abort);
 864 }
 865
 866 void qdev_prop_set_uint8(DeviceState *dev, const char *name, uint8_t value)
 867 {
 868     object_property_set_int(OBJECT(dev), value, name, &error_abort);
 869 }
 870
 871 void qdev_prop_set_uint16(DeviceState *dev, const char *name, uint16_t value)
 872 {
 873     object_property_set_int(OBJECT(dev), value, name, &error_abort);
 874 }
 875
 876 void qdev_prop_set_uint32(DeviceState *dev, const char *name, uint32_t value)
 877 {
 878     object_property_set_int(OBJECT(dev), value, name, &error_abort);
 879 }
 880
 881 void qdev_prop_set_int32(DeviceState *dev, const char *name, int32_t value)
 882 {
 883     object_property_set_int(OBJECT(dev), value, name, &error_abort);
 884 }
 885
 886 void qdev_prop_set_uint64(DeviceState *dev, const char *name, uint64_t value)
 887 {
 888     object_property_set_int(OBJECT(dev), value, name, &error_abort);
 889 }
 890
 891 void qdev_prop_set_string(DeviceState *dev, const char *name, const char *value)
 892 {
 893     object_property_set_str(OBJECT(dev), value, name, &error_abort);
 894 }
 895
 896 void qdev_prop_set_macaddr(DeviceState *dev, const char *name, uint8_t *value)
 897 {
 898     char str[2 * 6 + 5 + 1];
 899     snprintf(str, sizeof(str), "%02x:%02x:%02x:%02x:%02x:%02x",
 900              value[0], value[1], value[2], value[3], value[4], value[5]);
 901
 902     object_property_set_str(OBJECT(dev), str, name, &error_abort);
 903 }
 904
 905 void qdev_prop_set_enum(DeviceState *dev, const char *name, int value)
 906 {
 907     Property *prop;
 908
 909     prop = qdev_prop_find(dev, name);
 910     object_property_set_str(OBJECT(dev), prop->info->enum_table[value],
 911                             name, &error_abort);
 912 }
 913
 914 void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value)
 915 {
 916     Property *prop;
 917     void **ptr;
 918
 919     prop = qdev_prop_find(dev, name);
 920     assert(prop && prop->info == &qdev_prop_ptr);
 921     ptr = qdev_get_prop_ptr(dev, prop);
 922     *ptr = value;
 923 }
 924
 925 static QTAILQ_HEAD(, GlobalProperty) global_props =
 926         QTAILQ_HEAD_INITIALIZER(global_props);
 927
 928 void qdev_prop_register_global(GlobalProperty *prop)
 929 {
 930     QTAILQ_INSERT_TAIL(&global_props, prop, next);
 931 }
 932
 933 void qdev_prop_register_global_list(GlobalProperty *props)
 934 {
 935     int i;
 936
 937     for (i = 0; props[i].driver != NULL; i++) {
 938         qdev_prop_register_global(props+i);
 939     }
 940 }
 941
 942 void qdev_prop_set_globals_for_type(DeviceState *dev, const char *typename,
 943                                     Error **errp)
 944 {
 945     GlobalProperty *prop;
 946
 947     QTAILQ_FOREACH(prop, &global_props, next) {
 948         Error *err = NULL;
 949
 950         if (strcmp(typename, prop->driver) != 0) {
 951             continue;
 952         }
 953         object_property_parse(OBJECT(dev), prop->value, prop->property, &err);
 954         if (err != NULL) {
 955             error_propagate(errp, err);
 956             return;
 957         }
 958     }
 959 }
 960
 961 void qdev_prop_set_globals(DeviceState *dev, Error **errp)
 962 {
 963     ObjectClass *class = object_get_class(OBJECT(dev));
 964
 965     do {
 966         Error *err = NULL;
 967
 968         qdev_prop_set_globals_for_type(dev, object_class_get_name(class),
 969                                        &err);
 970         if (err != NULL) {
 971             error_propagate(errp, err);
 972             return;
 973         }
 974         class = object_class_get_parent(class);
 975     } while (class);
 976 }
 977
 978 /* --- 64bit unsigned int 'size' type --- */
 979
 980 static void get_size(Object *obj, Visitor *v, void *opaque,
 981                      const char *name, Error **errp)
 982 {
 983     DeviceState *dev = DEVICE(obj);
 984     Property *prop = opaque;
 985     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
 986
 987     visit_type_size(v, ptr, name, errp);
 988 }
 989
 990 static void set_size(Object *obj, Visitor *v, void *opaque,
 991                      const char *name, Error **errp)
 992 {
 993     DeviceState *dev = DEVICE(obj);
 994     Property *prop = opaque;
 995     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
 996
 997     visit_type_size(v, ptr, name, errp);
 998 }
 999
1000 PropertyInfo qdev_prop_size = {
1001     .name  = "size",
1002     .get = get_size,
1003     .set = set_size,
1004 };