1 /* 2 * USB Mass Storage Device emulation 3 * 4 * Copyright (c) 2006 CodeSourcery. 5 * Written by Paul Brook 6 * 7 * This code is licensed under the LGPL. 8 */ 9 10 #include "qemu-common.h" 11 #include "qemu-option.h" 12 #include "qemu-config.h" 13 #include "hw/usb.h" 14 #include "hw/usb/desc.h" 15 #include "hw/scsi.h" 16 #include "console.h" 17 #include "monitor.h" 18 #include "sysemu.h" 19 #include "blockdev.h" 20 21 //#define DEBUG_MSD 22 23 #ifdef DEBUG_MSD 24 #define DPRINTF(fmt, ...) \ 25 do { printf("usb-msd: " fmt , ## __VA_ARGS__); } while (0) 26 #else 27 #define DPRINTF(fmt, ...) do {} while(0) 28 #endif 29 30 /* USB requests. */ 31 #define MassStorageReset 0xff 32 #define GetMaxLun 0xfe 33 34 enum USBMSDMode { 35 USB_MSDM_CBW, /* Command Block. */ 36 USB_MSDM_DATAOUT, /* Transfer data to device. */ 37 USB_MSDM_DATAIN, /* Transfer data from device. */ 38 USB_MSDM_CSW /* Command Status. */ 39 }; 40 41 struct usb_msd_csw { 42 uint32_t sig; 43 uint32_t tag; 44 uint32_t residue; 45 uint8_t status; 46 }; 47 48 typedef struct { 49 USBDevice dev; 50 enum USBMSDMode mode; 51 uint32_t scsi_off; 52 uint32_t scsi_len; 53 uint32_t data_len; 54 struct usb_msd_csw csw; 55 SCSIRequest *req; 56 SCSIBus bus; 57 BlockConf conf; 58 char *serial; 59 SCSIDevice *scsi_dev; 60 uint32_t removable; 61 /* For async completion. */ 62 USBPacket *packet; 63 } MSDState; 64 65 struct usb_msd_cbw { 66 uint32_t sig; 67 uint32_t tag; 68 uint32_t data_len; 69 uint8_t flags; 70 uint8_t lun; 71 uint8_t cmd_len; 72 uint8_t cmd[16]; 73 }; 74 75 enum { 76 STR_MANUFACTURER = 1, 77 STR_PRODUCT, 78 STR_SERIALNUMBER, 79 STR_CONFIG_FULL, 80 STR_CONFIG_HIGH, 81 STR_CONFIG_SUPER, 82 }; 83 84 static const USBDescStrings desc_strings = { 85 [STR_MANUFACTURER] = "QEMU", 86 [STR_PRODUCT] = "QEMU USB HARDDRIVE", 87 [STR_SERIALNUMBER] = "1", 88 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 89 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 90 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 91 }; 92 93 static const USBDescIface desc_iface_full = { 94 .bInterfaceNumber = 0, 95 .bNumEndpoints = 2, 96 .bInterfaceClass = USB_CLASS_MASS_STORAGE, 97 .bInterfaceSubClass = 0x06, /* SCSI */ 98 .bInterfaceProtocol = 0x50, /* Bulk */ 99 .eps = (USBDescEndpoint[]) { 100 { 101 .bEndpointAddress = USB_DIR_IN | 0x01, 102 .bmAttributes = USB_ENDPOINT_XFER_BULK, 103 .wMaxPacketSize = 64, 104 },{ 105 .bEndpointAddress = USB_DIR_OUT | 0x02, 106 .bmAttributes = USB_ENDPOINT_XFER_BULK, 107 .wMaxPacketSize = 64, 108 }, 109 } 110 }; 111 112 static const USBDescDevice desc_device_full = { 113 .bcdUSB = 0x0200, 114 .bMaxPacketSize0 = 8, 115 .bNumConfigurations = 1, 116 .confs = (USBDescConfig[]) { 117 { 118 .bNumInterfaces = 1, 119 .bConfigurationValue = 1, 120 .iConfiguration = STR_CONFIG_FULL, 121 .bmAttributes = 0xc0, 122 .nif = 1, 123 .ifs = &desc_iface_full, 124 }, 125 }, 126 }; 127 128 static const USBDescIface desc_iface_high = { 129 .bInterfaceNumber = 0, 130 .bNumEndpoints = 2, 131 .bInterfaceClass = USB_CLASS_MASS_STORAGE, 132 .bInterfaceSubClass = 0x06, /* SCSI */ 133 .bInterfaceProtocol = 0x50, /* Bulk */ 134 .eps = (USBDescEndpoint[]) { 135 { 136 .bEndpointAddress = USB_DIR_IN | 0x01, 137 .bmAttributes = USB_ENDPOINT_XFER_BULK, 138 .wMaxPacketSize = 512, 139 },{ 140 .bEndpointAddress = USB_DIR_OUT | 0x02, 141 .bmAttributes = USB_ENDPOINT_XFER_BULK, 142 .wMaxPacketSize = 512, 143 }, 144 } 145 }; 146 147 static const USBDescDevice desc_device_high = { 148 .bcdUSB = 0x0200, 149 .bMaxPacketSize0 = 64, 150 .bNumConfigurations = 1, 151 .confs = (USBDescConfig[]) { 152 { 153 .bNumInterfaces = 1, 154 .bConfigurationValue = 1, 155 .iConfiguration = STR_CONFIG_HIGH, 156 .bmAttributes = 0xc0, 157 .nif = 1, 158 .ifs = &desc_iface_high, 159 }, 160 }, 161 }; 162 163 static const USBDescIface desc_iface_super = { 164 .bInterfaceNumber = 0, 165 .bNumEndpoints = 2, 166 .bInterfaceClass = USB_CLASS_MASS_STORAGE, 167 .bInterfaceSubClass = 0x06, /* SCSI */ 168 .bInterfaceProtocol = 0x50, /* Bulk */ 169 .eps = (USBDescEndpoint[]) { 170 { 171 .bEndpointAddress = USB_DIR_IN | 0x01, 172 .bmAttributes = USB_ENDPOINT_XFER_BULK, 173 .wMaxPacketSize = 1024, 174 .bMaxBurst = 15, 175 },{ 176 .bEndpointAddress = USB_DIR_OUT | 0x02, 177 .bmAttributes = USB_ENDPOINT_XFER_BULK, 178 .wMaxPacketSize = 1024, 179 .bMaxBurst = 15, 180 }, 181 } 182 }; 183 184 static const USBDescDevice desc_device_super = { 185 .bcdUSB = 0x0300, 186 .bMaxPacketSize0 = 9, 187 .bNumConfigurations = 1, 188 .confs = (USBDescConfig[]) { 189 { 190 .bNumInterfaces = 1, 191 .bConfigurationValue = 1, 192 .iConfiguration = STR_CONFIG_SUPER, 193 .bmAttributes = 0xc0, 194 .nif = 1, 195 .ifs = &desc_iface_super, 196 }, 197 }, 198 }; 199 200 static const USBDesc desc = { 201 .id = { 202 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 203 .idProduct = 0x0001, 204 .bcdDevice = 0, 205 .iManufacturer = STR_MANUFACTURER, 206 .iProduct = STR_PRODUCT, 207 .iSerialNumber = STR_SERIALNUMBER, 208 }, 209 .full = &desc_device_full, 210 .high = &desc_device_high, 211 .super = &desc_device_super, 212 .str = desc_strings, 213 }; 214 215 static void usb_msd_copy_data(MSDState *s, USBPacket *p) 216 { 217 uint32_t len; 218 len = p->iov.size - p->result; 219 if (len > s->scsi_len) 220 len = s->scsi_len; 221 usb_packet_copy(p, scsi_req_get_buf(s->req) + s->scsi_off, len); 222 s->scsi_len -= len; 223 s->scsi_off += len; 224 s->data_len -= len; 225 if (s->scsi_len == 0 || s->data_len == 0) { 226 scsi_req_continue(s->req); 227 } 228 } 229 230 static void usb_msd_send_status(MSDState *s, USBPacket *p) 231 { 232 int len; 233 234 DPRINTF("Command status %d tag 0x%x, len %zd\n", 235 s->csw.status, le32_to_cpu(s->csw.tag), p->iov.size); 236 237 assert(s->csw.sig == cpu_to_le32(0x53425355)); 238 len = MIN(sizeof(s->csw), p->iov.size); 239 usb_packet_copy(p, &s->csw, len); 240 memset(&s->csw, 0, sizeof(s->csw)); 241 } 242 243 static void usb_msd_packet_complete(MSDState *s) 244 { 245 USBPacket *p = s->packet; 246 247 /* Set s->packet to NULL before calling usb_packet_complete 248 because another request may be issued before 249 usb_packet_complete returns. */ 250 DPRINTF("Packet complete %p\n", p); 251 s->packet = NULL; 252 usb_packet_complete(&s->dev, p); 253 } 254 255 static void usb_msd_transfer_data(SCSIRequest *req, uint32_t len) 256 { 257 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); 258 USBPacket *p = s->packet; 259 260 assert((s->mode == USB_MSDM_DATAOUT) == (req->cmd.mode == SCSI_XFER_TO_DEV)); 261 s->scsi_len = len; 262 s->scsi_off = 0; 263 if (p) { 264 usb_msd_copy_data(s, p); 265 p = s->packet; 266 if (p && p->result == p->iov.size) { 267 usb_msd_packet_complete(s); 268 } 269 } 270 } 271 272 static void usb_msd_command_complete(SCSIRequest *req, uint32_t status, size_t resid) 273 { 274 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); 275 USBPacket *p = s->packet; 276 277 DPRINTF("Command complete %d tag 0x%x\n", status, req->tag); 278 279 s->csw.sig = cpu_to_le32(0x53425355); 280 s->csw.tag = cpu_to_le32(req->tag); 281 s->csw.residue = cpu_to_le32(s->data_len); 282 s->csw.status = status != 0; 283 284 if (s->packet) { 285 if (s->data_len == 0 && s->mode == USB_MSDM_DATAOUT) { 286 /* A deferred packet with no write data remaining must be 287 the status read packet. */ 288 usb_msd_send_status(s, p); 289 s->mode = USB_MSDM_CBW; 290 } else if (s->mode == USB_MSDM_CSW) { 291 usb_msd_send_status(s, p); 292 s->mode = USB_MSDM_CBW; 293 } else { 294 if (s->data_len) { 295 int len = (p->iov.size - p->result); 296 usb_packet_skip(p, len); 297 s->data_len -= len; 298 } 299 if (s->data_len == 0) { 300 s->mode = USB_MSDM_CSW; 301 } 302 } 303 usb_msd_packet_complete(s); 304 } else if (s->data_len == 0) { 305 s->mode = USB_MSDM_CSW; 306 } 307 scsi_req_unref(req); 308 s->req = NULL; 309 } 310 311 static void usb_msd_request_cancelled(SCSIRequest *req) 312 { 313 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); 314 315 if (req == s->req) { 316 scsi_req_unref(s->req); 317 s->req = NULL; 318 s->scsi_len = 0; 319 } 320 } 321 322 static void usb_msd_handle_reset(USBDevice *dev) 323 { 324 MSDState *s = (MSDState *)dev; 325 326 DPRINTF("Reset\n"); 327 if (s->req) { 328 scsi_req_cancel(s->req); 329 } 330 assert(s->req == NULL); 331 332 if (s->packet) { 333 s->packet->result = USB_RET_STALL; 334 usb_msd_packet_complete(s); 335 } 336 337 s->mode = USB_MSDM_CBW; 338 } 339 340 static int usb_msd_handle_control(USBDevice *dev, USBPacket *p, 341 int request, int value, int index, int length, uint8_t *data) 342 { 343 MSDState *s = (MSDState *)dev; 344 int ret; 345 346 ret = usb_desc_handle_control(dev, p, request, value, index, length, data); 347 if (ret >= 0) { 348 return ret; 349 } 350 351 ret = 0; 352 switch (request) { 353 case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 354 ret = 0; 355 break; 356 /* Class specific requests. */ 357 case ClassInterfaceOutRequest | MassStorageReset: 358 /* Reset state ready for the next CBW. */ 359 s->mode = USB_MSDM_CBW; 360 ret = 0; 361 break; 362 case ClassInterfaceRequest | GetMaxLun: 363 data[0] = 0; 364 ret = 1; 365 break; 366 default: 367 ret = USB_RET_STALL; 368 break; 369 } 370 return ret; 371 } 372 373 static void usb_msd_cancel_io(USBDevice *dev, USBPacket *p) 374 { 375 MSDState *s = DO_UPCAST(MSDState, dev, dev); 376 377 assert(s->packet == p); 378 s->packet = NULL; 379 380 if (s->req) { 381 scsi_req_cancel(s->req); 382 } 383 } 384 385 static int usb_msd_handle_data(USBDevice *dev, USBPacket *p) 386 { 387 MSDState *s = (MSDState *)dev; 388 uint32_t tag; 389 int ret = 0; 390 struct usb_msd_cbw cbw; 391 uint8_t devep = p->ep->nr; 392 393 switch (p->pid) { 394 case USB_TOKEN_OUT: 395 if (devep != 2) 396 goto fail; 397 398 switch (s->mode) { 399 case USB_MSDM_CBW: 400 if (p->iov.size != 31) { 401 fprintf(stderr, "usb-msd: Bad CBW size"); 402 goto fail; 403 } 404 usb_packet_copy(p, &cbw, 31); 405 if (le32_to_cpu(cbw.sig) != 0x43425355) { 406 fprintf(stderr, "usb-msd: Bad signature %08x\n", 407 le32_to_cpu(cbw.sig)); 408 goto fail; 409 } 410 DPRINTF("Command on LUN %d\n", cbw.lun); 411 if (cbw.lun != 0) { 412 fprintf(stderr, "usb-msd: Bad LUN %d\n", cbw.lun); 413 goto fail; 414 } 415 tag = le32_to_cpu(cbw.tag); 416 s->data_len = le32_to_cpu(cbw.data_len); 417 if (s->data_len == 0) { 418 s->mode = USB_MSDM_CSW; 419 } else if (cbw.flags & 0x80) { 420 s->mode = USB_MSDM_DATAIN; 421 } else { 422 s->mode = USB_MSDM_DATAOUT; 423 } 424 DPRINTF("Command tag 0x%x flags %08x len %d data %d\n", 425 tag, cbw.flags, cbw.cmd_len, s->data_len); 426 assert(le32_to_cpu(s->csw.residue) == 0); 427 s->scsi_len = 0; 428 s->req = scsi_req_new(s->scsi_dev, tag, 0, cbw.cmd, NULL); 429 #ifdef DEBUG_MSD 430 scsi_req_print(s->req); 431 #endif 432 scsi_req_enqueue(s->req); 433 if (s->req && s->req->cmd.xfer != SCSI_XFER_NONE) { 434 scsi_req_continue(s->req); 435 } 436 ret = p->result; 437 break; 438 439 case USB_MSDM_DATAOUT: 440 DPRINTF("Data out %zd/%d\n", p->iov.size, s->data_len); 441 if (p->iov.size > s->data_len) { 442 goto fail; 443 } 444 445 if (s->scsi_len) { 446 usb_msd_copy_data(s, p); 447 } 448 if (le32_to_cpu(s->csw.residue)) { 449 int len = p->iov.size - p->result; 450 if (len) { 451 usb_packet_skip(p, len); 452 s->data_len -= len; 453 if (s->data_len == 0) { 454 s->mode = USB_MSDM_CSW; 455 } 456 } 457 } 458 if (p->result < p->iov.size) { 459 DPRINTF("Deferring packet %p [wait data-out]\n", p); 460 s->packet = p; 461 ret = USB_RET_ASYNC; 462 } else { 463 ret = p->result; 464 } 465 break; 466 467 default: 468 DPRINTF("Unexpected write (len %zd)\n", p->iov.size); 469 goto fail; 470 } 471 break; 472 473 case USB_TOKEN_IN: 474 if (devep != 1) 475 goto fail; 476 477 switch (s->mode) { 478 case USB_MSDM_DATAOUT: 479 if (s->data_len != 0 || p->iov.size < 13) { 480 goto fail; 481 } 482 /* Waiting for SCSI write to complete. */ 483 s->packet = p; 484 ret = USB_RET_ASYNC; 485 break; 486 487 case USB_MSDM_CSW: 488 if (p->iov.size < 13) { 489 goto fail; 490 } 491 492 if (s->req) { 493 /* still in flight */ 494 DPRINTF("Deferring packet %p [wait status]\n", p); 495 s->packet = p; 496 ret = USB_RET_ASYNC; 497 } else { 498 usb_msd_send_status(s, p); 499 s->mode = USB_MSDM_CBW; 500 ret = 13; 501 } 502 break; 503 504 case USB_MSDM_DATAIN: 505 DPRINTF("Data in %zd/%d, scsi_len %d\n", 506 p->iov.size, s->data_len, s->scsi_len); 507 if (s->scsi_len) { 508 usb_msd_copy_data(s, p); 509 } 510 if (le32_to_cpu(s->csw.residue)) { 511 int len = p->iov.size - p->result; 512 if (len) { 513 usb_packet_skip(p, len); 514 s->data_len -= len; 515 if (s->data_len == 0) { 516 s->mode = USB_MSDM_CSW; 517 } 518 } 519 } 520 if (p->result < p->iov.size) { 521 DPRINTF("Deferring packet %p [wait data-in]\n", p); 522 s->packet = p; 523 ret = USB_RET_ASYNC; 524 } else { 525 ret = p->result; 526 } 527 break; 528 529 default: 530 DPRINTF("Unexpected read (len %zd)\n", p->iov.size); 531 goto fail; 532 } 533 break; 534 535 default: 536 DPRINTF("Bad token\n"); 537 fail: 538 ret = USB_RET_STALL; 539 break; 540 } 541 542 return ret; 543 } 544 545 static void usb_msd_password_cb(void *opaque, int err) 546 { 547 MSDState *s = opaque; 548 549 if (!err) 550 err = usb_device_attach(&s->dev); 551 552 if (err) 553 qdev_unplug(&s->dev.qdev, NULL); 554 } 555 556 static void *usb_msd_load_request(QEMUFile *f, SCSIRequest *req) 557 { 558 MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); 559 560 /* nothing to load, just store req in our state struct */ 561 assert(s->req == NULL); 562 scsi_req_ref(req); 563 s->req = req; 564 return NULL; 565 } 566 567 static const struct SCSIBusInfo usb_msd_scsi_info = { 568 .tcq = false, 569 .max_target = 0, 570 .max_lun = 0, 571 572 .transfer_data = usb_msd_transfer_data, 573 .complete = usb_msd_command_complete, 574 .cancel = usb_msd_request_cancelled, 575 .load_request = usb_msd_load_request, 576 }; 577 578 static int usb_msd_initfn(USBDevice *dev) 579 { 580 MSDState *s = DO_UPCAST(MSDState, dev, dev); 581 BlockDriverState *bs = s->conf.bs; 582 583 if (!bs) { 584 error_report("drive property not set"); 585 return -1; 586 } 587 588 blkconf_serial(&s->conf, &s->serial); 589 590 /* 591 * Hack alert: this pretends to be a block device, but it's really 592 * a SCSI bus that can serve only a single device, which it 593 * creates automatically. But first it needs to detach from its 594 * blockdev, or else scsi_bus_legacy_add_drive() dies when it 595 * attaches again. 596 * 597 * The hack is probably a bad idea. 598 */ 599 bdrv_detach_dev(bs, &s->dev.qdev); 600 s->conf.bs = NULL; 601 602 if (s->serial) { 603 usb_desc_set_string(dev, STR_SERIALNUMBER, s->serial); 604 } else { 605 usb_desc_create_serial(dev); 606 } 607 608 usb_desc_init(dev); 609 scsi_bus_new(&s->bus, &s->dev.qdev, &usb_msd_scsi_info); 610 s->scsi_dev = scsi_bus_legacy_add_drive(&s->bus, bs, 0, !!s->removable, 611 s->conf.bootindex); 612 if (!s->scsi_dev) { 613 return -1; 614 } 615 s->bus.qbus.allow_hotplug = 0; 616 usb_msd_handle_reset(dev); 617 618 if (bdrv_key_required(bs)) { 619 if (cur_mon) { 620 monitor_read_bdrv_key_start(cur_mon, bs, usb_msd_password_cb, s); 621 s->dev.auto_attach = 0; 622 } else { 623 autostart = 0; 624 } 625 } 626 627 return 0; 628 } 629 630 static USBDevice *usb_msd_init(USBBus *bus, const char *filename) 631 { 632 static int nr=0; 633 char id[8]; 634 QemuOpts *opts; 635 DriveInfo *dinfo; 636 USBDevice *dev; 637 const char *p1; 638 char fmt[32]; 639 640 /* parse -usbdevice disk: syntax into drive opts */ 641 snprintf(id, sizeof(id), "usb%d", nr++); 642 opts = qemu_opts_create(qemu_find_opts("drive"), id, 0, NULL); 643 644 p1 = strchr(filename, ':'); 645 if (p1++) { 646 const char *p2; 647 648 if (strstart(filename, "format=", &p2)) { 649 int len = MIN(p1 - p2, sizeof(fmt)); 650 pstrcpy(fmt, len, p2); 651 qemu_opt_set(opts, "format", fmt); 652 } else if (*filename != ':') { 653 printf("unrecognized USB mass-storage option %s\n", filename); 654 return NULL; 655 } 656 filename = p1; 657 } 658 if (!*filename) { 659 printf("block device specification needed\n"); 660 return NULL; 661 } 662 qemu_opt_set(opts, "file", filename); 663 qemu_opt_set(opts, "if", "none"); 664 665 /* create host drive */ 666 dinfo = drive_init(opts, 0); 667 if (!dinfo) { 668 qemu_opts_del(opts); 669 return NULL; 670 } 671 672 /* create guest device */ 673 dev = usb_create(bus, "usb-storage"); 674 if (!dev) { 675 return NULL; 676 } 677 if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) { 678 qdev_free(&dev->qdev); 679 return NULL; 680 } 681 if (qdev_init(&dev->qdev) < 0) 682 return NULL; 683 684 return dev; 685 } 686 687 static const VMStateDescription vmstate_usb_msd = { 688 .name = "usb-storage", 689 .version_id = 1, 690 .minimum_version_id = 1, 691 .fields = (VMStateField []) { 692 VMSTATE_USB_DEVICE(dev, MSDState), 693 VMSTATE_UINT32(mode, MSDState), 694 VMSTATE_UINT32(scsi_len, MSDState), 695 VMSTATE_UINT32(scsi_off, MSDState), 696 VMSTATE_UINT32(data_len, MSDState), 697 VMSTATE_UINT32(csw.sig, MSDState), 698 VMSTATE_UINT32(csw.tag, MSDState), 699 VMSTATE_UINT32(csw.residue, MSDState), 700 VMSTATE_UINT8(csw.status, MSDState), 701 VMSTATE_END_OF_LIST() 702 } 703 }; 704 705 static Property msd_properties[] = { 706 DEFINE_BLOCK_PROPERTIES(MSDState, conf), 707 DEFINE_PROP_STRING("serial", MSDState, serial), 708 DEFINE_PROP_BIT("removable", MSDState, removable, 0, false), 709 DEFINE_PROP_END_OF_LIST(), 710 }; 711 712 static void usb_msd_class_initfn(ObjectClass *klass, void *data) 713 { 714 DeviceClass *dc = DEVICE_CLASS(klass); 715 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 716 717 uc->init = usb_msd_initfn; 718 uc->product_desc = "QEMU USB MSD"; 719 uc->usb_desc = &desc; 720 uc->cancel_packet = usb_msd_cancel_io; 721 uc->handle_attach = usb_desc_attach; 722 uc->handle_reset = usb_msd_handle_reset; 723 uc->handle_control = usb_msd_handle_control; 724 uc->handle_data = usb_msd_handle_data; 725 dc->fw_name = "storage"; 726 dc->vmsd = &vmstate_usb_msd; 727 dc->props = msd_properties; 728 } 729 730 static TypeInfo msd_info = { 731 .name = "usb-storage", 732 .parent = TYPE_USB_DEVICE, 733 .instance_size = sizeof(MSDState), 734 .class_init = usb_msd_class_initfn, 735 }; 736 737 static void usb_msd_register_types(void) 738 { 739 type_register_static(&msd_info); 740 usb_legacy_register("usb-storage", "disk", usb_msd_init); 741 } 742 743 type_init(usb_msd_register_types) 744