hw/usb/dev-storage.c

   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-file.h"
  13 #include "hw/usb.h"
  14 #include "hw/usb/desc.h"
  15 #include "hw/scsi/scsi.h"
  16 #include "ui/console.h"
  17 #include "monitor/monitor.h"
  18 #include "sysemu/sysemu.h"
  19 #include "sysemu/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     /* For async completion.  */
  58     USBPacket *packet;
  59     /* usb-storage only */
  60     BlockConf conf;
  61     uint32_t removable;
  62 } MSDState;
  63
  64 struct usb_msd_cbw {
  65     uint32_t sig;
  66     uint32_t tag;
  67     uint32_t data_len;
  68     uint8_t flags;
  69     uint8_t lun;
  70     uint8_t cmd_len;
  71     uint8_t cmd[16];
  72 };
  73
  74 enum {
  75     STR_MANUFACTURER = 1,
  76     STR_PRODUCT,
  77     STR_SERIALNUMBER,
  78     STR_CONFIG_FULL,
  79     STR_CONFIG_HIGH,
  80     STR_CONFIG_SUPER,
  81 };
  82
  83 static const USBDescStrings desc_strings = {
  84     [STR_MANUFACTURER] = "QEMU",
  85     [STR_PRODUCT]      = "QEMU USB HARDDRIVE",
  86     [STR_SERIALNUMBER] = "1",
  87     [STR_CONFIG_FULL]  = "Full speed config (usb 1.1)",
  88     [STR_CONFIG_HIGH]  = "High speed config (usb 2.0)",
  89     [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
  90 };
  91
  92 static const USBDescIface desc_iface_full = {
  93     .bInterfaceNumber              = 0,
  94     .bNumEndpoints                 = 2,
  95     .bInterfaceClass               = USB_CLASS_MASS_STORAGE,
  96     .bInterfaceSubClass            = 0x06, /* SCSI */
  97     .bInterfaceProtocol            = 0x50, /* Bulk */
  98     .eps = (USBDescEndpoint[]) {
  99         {
 100             .bEndpointAddress      = USB_DIR_IN | 0x01,
 101             .bmAttributes          = USB_ENDPOINT_XFER_BULK,
 102             .wMaxPacketSize        = 64,
 103         },{
 104             .bEndpointAddress      = USB_DIR_OUT | 0x02,
 105             .bmAttributes          = USB_ENDPOINT_XFER_BULK,
 106             .wMaxPacketSize        = 64,
 107         },
 108     }
 109 };
 110
 111 static const USBDescDevice desc_device_full = {
 112     .bcdUSB                        = 0x0200,
 113     .bMaxPacketSize0               = 8,
 114     .bNumConfigurations            = 1,
 115     .confs = (USBDescConfig[]) {
 116         {
 117             .bNumInterfaces        = 1,
 118             .bConfigurationValue   = 1,
 119             .iConfiguration        = STR_CONFIG_FULL,
 120             .bmAttributes          = 0xc0,
 121             .nif = 1,
 122             .ifs = &desc_iface_full,
 123         },
 124     },
 125 };
 126
 127 static const USBDescIface desc_iface_high = {
 128     .bInterfaceNumber              = 0,
 129     .bNumEndpoints                 = 2,
 130     .bInterfaceClass               = USB_CLASS_MASS_STORAGE,
 131     .bInterfaceSubClass            = 0x06, /* SCSI */
 132     .bInterfaceProtocol            = 0x50, /* Bulk */
 133     .eps = (USBDescEndpoint[]) {
 134         {
 135             .bEndpointAddress      = USB_DIR_IN | 0x01,
 136             .bmAttributes          = USB_ENDPOINT_XFER_BULK,
 137             .wMaxPacketSize        = 512,
 138         },{
 139             .bEndpointAddress      = USB_DIR_OUT | 0x02,
 140             .bmAttributes          = USB_ENDPOINT_XFER_BULK,
 141             .wMaxPacketSize        = 512,
 142         },
 143     }
 144 };
 145
 146 static const USBDescDevice desc_device_high = {
 147     .bcdUSB                        = 0x0200,
 148     .bMaxPacketSize0               = 64,
 149     .bNumConfigurations            = 1,
 150     .confs = (USBDescConfig[]) {
 151         {
 152             .bNumInterfaces        = 1,
 153             .bConfigurationValue   = 1,
 154             .iConfiguration        = STR_CONFIG_HIGH,
 155             .bmAttributes          = 0xc0,
 156             .nif = 1,
 157             .ifs = &desc_iface_high,
 158         },
 159     },
 160 };
 161
 162 static const USBDescIface desc_iface_super = {
 163     .bInterfaceNumber              = 0,
 164     .bNumEndpoints                 = 2,
 165     .bInterfaceClass               = USB_CLASS_MASS_STORAGE,
 166     .bInterfaceSubClass            = 0x06, /* SCSI */
 167     .bInterfaceProtocol            = 0x50, /* Bulk */
 168     .eps = (USBDescEndpoint[]) {
 169         {
 170             .bEndpointAddress      = USB_DIR_IN | 0x01,
 171             .bmAttributes          = USB_ENDPOINT_XFER_BULK,
 172             .wMaxPacketSize        = 1024,
 173             .bMaxBurst             = 15,
 174         },{
 175             .bEndpointAddress      = USB_DIR_OUT | 0x02,
 176             .bmAttributes          = USB_ENDPOINT_XFER_BULK,
 177             .wMaxPacketSize        = 1024,
 178             .bMaxBurst             = 15,
 179         },
 180     }
 181 };
 182
 183 static const USBDescDevice desc_device_super = {
 184     .bcdUSB                        = 0x0300,
 185     .bMaxPacketSize0               = 9,
 186     .bNumConfigurations            = 1,
 187     .confs = (USBDescConfig[]) {
 188         {
 189             .bNumInterfaces        = 1,
 190             .bConfigurationValue   = 1,
 191             .iConfiguration        = STR_CONFIG_SUPER,
 192             .bmAttributes          = 0xc0,
 193             .nif = 1,
 194             .ifs = &desc_iface_super,
 195         },
 196     },
 197 };
 198
 199 static const USBDesc desc = {
 200     .id = {
 201         .idVendor          = 0x46f4, /* CRC16() of "QEMU" */
 202         .idProduct         = 0x0001,
 203         .bcdDevice         = 0,
 204         .iManufacturer     = STR_MANUFACTURER,
 205         .iProduct          = STR_PRODUCT,
 206         .iSerialNumber     = STR_SERIALNUMBER,
 207     },
 208     .full  = &desc_device_full,
 209     .high  = &desc_device_high,
 210     .super = &desc_device_super,
 211     .str   = desc_strings,
 212 };
 213
 214 static void usb_msd_copy_data(MSDState *s, USBPacket *p)
 215 {
 216     uint32_t len;
 217     len = p->iov.size - p->actual_length;
 218     if (len > s->scsi_len)
 219         len = s->scsi_len;
 220     usb_packet_copy(p, scsi_req_get_buf(s->req) + s->scsi_off, len);
 221     s->scsi_len -= len;
 222     s->scsi_off += len;
 223     s->data_len -= len;
 224     if (s->scsi_len == 0 || s->data_len == 0) {
 225         scsi_req_continue(s->req);
 226     }
 227 }
 228
 229 static void usb_msd_send_status(MSDState *s, USBPacket *p)
 230 {
 231     int len;
 232
 233     DPRINTF("Command status %d tag 0x%x, len %zd\n",
 234             s->csw.status, le32_to_cpu(s->csw.tag), p->iov.size);
 235
 236     assert(s->csw.sig == cpu_to_le32(0x53425355));
 237     len = MIN(sizeof(s->csw), p->iov.size);
 238     usb_packet_copy(p, &s->csw, len);
 239     memset(&s->csw, 0, sizeof(s->csw));
 240 }
 241
 242 static void usb_msd_packet_complete(MSDState *s)
 243 {
 244     USBPacket *p = s->packet;
 245
 246     /* Set s->packet to NULL before calling usb_packet_complete
 247        because another request may be issued before
 248        usb_packet_complete returns.  */
 249     DPRINTF("Packet complete %p\n", p);
 250     s->packet = NULL;
 251     usb_packet_complete(&s->dev, p);
 252 }
 253
 254 static void usb_msd_transfer_data(SCSIRequest *req, uint32_t len)
 255 {
 256     MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent);
 257     USBPacket *p = s->packet;
 258
 259     assert((s->mode == USB_MSDM_DATAOUT) == (req->cmd.mode == SCSI_XFER_TO_DEV));
 260     s->scsi_len = len;
 261     s->scsi_off = 0;
 262     if (p) {
 263         usb_msd_copy_data(s, p);
 264         p = s->packet;
 265         if (p && p->actual_length == p->iov.size) {
 266             p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */
 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->actual_length);
 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         p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */
 304         usb_msd_packet_complete(s);
 305     } else if (s->data_len == 0) {
 306         s->mode = USB_MSDM_CSW;
 307     }
 308     scsi_req_unref(req);
 309     s->req = NULL;
 310 }
 311
 312 static void usb_msd_request_cancelled(SCSIRequest *req)
 313 {
 314     MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent);
 315
 316     if (req == s->req) {
 317         scsi_req_unref(s->req);
 318         s->req = NULL;
 319         s->scsi_len = 0;
 320     }
 321 }
 322
 323 static void usb_msd_handle_reset(USBDevice *dev)
 324 {
 325     MSDState *s = (MSDState *)dev;
 326
 327     DPRINTF("Reset\n");
 328     if (s->req) {
 329         scsi_req_cancel(s->req);
 330     }
 331     assert(s->req == NULL);
 332
 333     if (s->packet) {
 334         s->packet->status = USB_RET_STALL;
 335         usb_msd_packet_complete(s);
 336     }
 337
 338     s->mode = USB_MSDM_CBW;
 339 }
 340
 341 static void usb_msd_handle_control(USBDevice *dev, USBPacket *p,
 342                int request, int value, int index, int length, uint8_t *data)
 343 {
 344     MSDState *s = (MSDState *)dev;
 345     SCSIDevice *scsi_dev;
 346     int ret, maxlun;
 347
 348     ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
 349     if (ret >= 0) {
 350         return;
 351     }
 352
 353     switch (request) {
 354     case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
 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         break;
 361     case ClassInterfaceRequest | GetMaxLun:
 362         maxlun = 0;
 363         for (;;) {
 364             scsi_dev = scsi_device_find(&s->bus, 0, 0, maxlun+1);
 365             if (scsi_dev == NULL) {
 366                 break;
 367             }
 368             if (scsi_dev->lun != maxlun+1) {
 369                 break;
 370             }
 371             maxlun++;
 372         }
 373         DPRINTF("MaxLun %d\n", maxlun);
 374         data[0] = maxlun;
 375         p->actual_length = 1;
 376         break;
 377     default:
 378         p->status = USB_RET_STALL;
 379         break;
 380     }
 381 }
 382
 383 static void usb_msd_cancel_io(USBDevice *dev, USBPacket *p)
 384 {
 385     MSDState *s = DO_UPCAST(MSDState, dev, dev);
 386
 387     assert(s->packet == p);
 388     s->packet = NULL;
 389
 390     if (s->req) {
 391         scsi_req_cancel(s->req);
 392     }
 393 }
 394
 395 static void usb_msd_handle_data(USBDevice *dev, USBPacket *p)
 396 {
 397     MSDState *s = (MSDState *)dev;
 398     uint32_t tag;
 399     struct usb_msd_cbw cbw;
 400     uint8_t devep = p->ep->nr;
 401     SCSIDevice *scsi_dev;
 402     uint32_t len;
 403
 404     switch (p->pid) {
 405     case USB_TOKEN_OUT:
 406         if (devep != 2)
 407             goto fail;
 408
 409         switch (s->mode) {
 410         case USB_MSDM_CBW:
 411             if (p->iov.size != 31) {
 412                 fprintf(stderr, "usb-msd: Bad CBW size");
 413                 goto fail;
 414             }
 415             usb_packet_copy(p, &cbw, 31);
 416             if (le32_to_cpu(cbw.sig) != 0x43425355) {
 417                 fprintf(stderr, "usb-msd: Bad signature %08x\n",
 418                         le32_to_cpu(cbw.sig));
 419                 goto fail;
 420             }
 421             DPRINTF("Command on LUN %d\n", cbw.lun);
 422             scsi_dev = scsi_device_find(&s->bus, 0, 0, cbw.lun);
 423             if (scsi_dev == NULL) {
 424                 fprintf(stderr, "usb-msd: Bad LUN %d\n", cbw.lun);
 425                 goto fail;
 426             }
 427             tag = le32_to_cpu(cbw.tag);
 428             s->data_len = le32_to_cpu(cbw.data_len);
 429             if (s->data_len == 0) {
 430                 s->mode = USB_MSDM_CSW;
 431             } else if (cbw.flags & 0x80) {
 432                 s->mode = USB_MSDM_DATAIN;
 433             } else {
 434                 s->mode = USB_MSDM_DATAOUT;
 435             }
 436             DPRINTF("Command tag 0x%x flags %08x len %d data %d\n",
 437                     tag, cbw.flags, cbw.cmd_len, s->data_len);
 438             assert(le32_to_cpu(s->csw.residue) == 0);
 439             s->scsi_len = 0;
 440             s->req = scsi_req_new(scsi_dev, tag, cbw.lun, cbw.cmd, NULL);
 441 #ifdef DEBUG_MSD
 442             scsi_req_print(s->req);
 443 #endif
 444             len = scsi_req_enqueue(s->req);
 445             if (len) {
 446                 scsi_req_continue(s->req);
 447             }
 448             break;
 449
 450         case USB_MSDM_DATAOUT:
 451             DPRINTF("Data out %zd/%d\n", p->iov.size, s->data_len);
 452             if (p->iov.size > s->data_len) {
 453                 goto fail;
 454             }
 455
 456             if (s->scsi_len) {
 457                 usb_msd_copy_data(s, p);
 458             }
 459             if (le32_to_cpu(s->csw.residue)) {
 460                 int len = p->iov.size - p->actual_length;
 461                 if (len) {
 462                     usb_packet_skip(p, len);
 463                     s->data_len -= len;
 464                     if (s->data_len == 0) {
 465                         s->mode = USB_MSDM_CSW;
 466                     }
 467                 }
 468             }
 469             if (p->actual_length < p->iov.size) {
 470                 DPRINTF("Deferring packet %p [wait data-out]\n", p);
 471                 s->packet = p;
 472                 p->status = USB_RET_ASYNC;
 473             }
 474             break;
 475
 476         default:
 477             DPRINTF("Unexpected write (len %zd)\n", p->iov.size);
 478             goto fail;
 479         }
 480         break;
 481
 482     case USB_TOKEN_IN:
 483         if (devep != 1)
 484             goto fail;
 485
 486         switch (s->mode) {
 487         case USB_MSDM_DATAOUT:
 488             if (s->data_len != 0 || p->iov.size < 13) {
 489                 goto fail;
 490             }
 491             /* Waiting for SCSI write to complete.  */
 492             s->packet = p;
 493             p->status = USB_RET_ASYNC;
 494             break;
 495
 496         case USB_MSDM_CSW:
 497             if (p->iov.size < 13) {
 498                 goto fail;
 499             }
 500
 501             if (s->req) {
 502                 /* still in flight */
 503                 DPRINTF("Deferring packet %p [wait status]\n", p);
 504                 s->packet = p;
 505                 p->status = USB_RET_ASYNC;
 506             } else {
 507                 usb_msd_send_status(s, p);
 508                 s->mode = USB_MSDM_CBW;
 509             }
 510             break;
 511
 512         case USB_MSDM_DATAIN:
 513             DPRINTF("Data in %zd/%d, scsi_len %d\n",
 514                     p->iov.size, s->data_len, s->scsi_len);
 515             if (s->scsi_len) {
 516                 usb_msd_copy_data(s, p);
 517             }
 518             if (le32_to_cpu(s->csw.residue)) {
 519                 int len = p->iov.size - p->actual_length;
 520                 if (len) {
 521                     usb_packet_skip(p, len);
 522                     s->data_len -= len;
 523                     if (s->data_len == 0) {
 524                         s->mode = USB_MSDM_CSW;
 525                     }
 526                 }
 527             }
 528             if (p->actual_length < p->iov.size) {
 529                 DPRINTF("Deferring packet %p [wait data-in]\n", p);
 530                 s->packet = p;
 531                 p->status = USB_RET_ASYNC;
 532             }
 533             break;
 534
 535         default:
 536             DPRINTF("Unexpected read (len %zd)\n", p->iov.size);
 537             goto fail;
 538         }
 539         break;
 540
 541     default:
 542         DPRINTF("Bad token\n");
 543     fail:
 544         p->status = USB_RET_STALL;
 545         break;
 546     }
 547 }
 548
 549 static void usb_msd_password_cb(void *opaque, int err)
 550 {
 551     MSDState *s = opaque;
 552
 553     if (!err)
 554         err = usb_device_attach(&s->dev);
 555
 556     if (err)
 557         qdev_unplug(&s->dev.qdev, NULL);
 558 }
 559
 560 static void *usb_msd_load_request(QEMUFile *f, SCSIRequest *req)
 561 {
 562     MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent);
 563
 564     /* nothing to load, just store req in our state struct */
 565     assert(s->req == NULL);
 566     scsi_req_ref(req);
 567     s->req = req;
 568     return NULL;
 569 }
 570
 571 static const struct SCSIBusInfo usb_msd_scsi_info_storage = {
 572     .tcq = false,
 573     .max_target = 0,
 574     .max_lun = 0,
 575
 576     .transfer_data = usb_msd_transfer_data,
 577     .complete = usb_msd_command_complete,
 578     .cancel = usb_msd_request_cancelled,
 579     .load_request = usb_msd_load_request,
 580 };
 581
 582 static const struct SCSIBusInfo usb_msd_scsi_info_bot = {
 583     .tcq = false,
 584     .max_target = 0,
 585     .max_lun = 15,
 586
 587     .transfer_data = usb_msd_transfer_data,
 588     .complete = usb_msd_command_complete,
 589     .cancel = usb_msd_request_cancelled,
 590     .load_request = usb_msd_load_request,
 591 };
 592
 593 static int usb_msd_initfn_storage(USBDevice *dev)
 594 {
 595     MSDState *s = DO_UPCAST(MSDState, dev, dev);
 596     BlockDriverState *bs = s->conf.bs;
 597     SCSIDevice *scsi_dev;
 598     Error *err = NULL;
 599
 600     if (!bs) {
 601         error_report("drive property not set");
 602         return -1;
 603     }
 604
 605     blkconf_serial(&s->conf, &dev->serial);
 606
 607     /*
 608      * Hack alert: this pretends to be a block device, but it's really
 609      * a SCSI bus that can serve only a single device, which it
 610      * creates automatically.  But first it needs to detach from its
 611      * blockdev, or else scsi_bus_legacy_add_drive() dies when it
 612      * attaches again.
 613      *
 614      * The hack is probably a bad idea.
 615      */
 616     bdrv_detach_dev(bs, &s->dev.qdev);
 617     s->conf.bs = NULL;
 618
 619     usb_desc_create_serial(dev);
 620     usb_desc_init(dev);
 621     scsi_bus_new(&s->bus, sizeof(s->bus), DEVICE(dev),
 622                  &usb_msd_scsi_info_storage, NULL);
 623     scsi_dev = scsi_bus_legacy_add_drive(&s->bus, bs, 0, !!s->removable,
 624                                          s->conf.bootindex, dev->serial,
 625                                          &err);
 626     if (!scsi_dev) {
 627         return -1;
 628     }
 629     s->bus.qbus.allow_hotplug = 0;
 630     usb_msd_handle_reset(dev);
 631
 632     if (bdrv_key_required(bs)) {
 633         if (cur_mon) {
 634             monitor_read_bdrv_key_start(cur_mon, bs, usb_msd_password_cb, s);
 635             s->dev.auto_attach = 0;
 636         } else {
 637             autostart = 0;
 638         }
 639     }
 640
 641     return 0;
 642 }
 643
 644 static int usb_msd_initfn_bot(USBDevice *dev)
 645 {
 646     MSDState *s = DO_UPCAST(MSDState, dev, dev);
 647
 648     usb_desc_create_serial(dev);
 649     usb_desc_init(dev);
 650     scsi_bus_new(&s->bus, sizeof(s->bus), DEVICE(dev),
 651                  &usb_msd_scsi_info_bot, NULL);
 652     s->bus.qbus.allow_hotplug = 0;
 653     usb_msd_handle_reset(dev);
 654
 655     return 0;
 656 }
 657
 658 static USBDevice *usb_msd_init(USBBus *bus, const char *filename)
 659 {
 660     static int nr=0;
 661     char id[8];
 662     QemuOpts *opts;
 663     DriveInfo *dinfo;
 664     USBDevice *dev;
 665     const char *p1;
 666     char fmt[32];
 667
 668     /* parse -usbdevice disk: syntax into drive opts */
 669     snprintf(id, sizeof(id), "usb%d", nr++);
 670     opts = qemu_opts_create(qemu_find_opts("drive"), id, 0, NULL);
 671
 672     p1 = strchr(filename, ':');
 673     if (p1++) {
 674         const char *p2;
 675
 676         if (strstart(filename, "format=", &p2)) {
 677             int len = MIN(p1 - p2, sizeof(fmt));
 678             pstrcpy(fmt, len, p2);
 679             qemu_opt_set(opts, "format", fmt);
 680         } else if (*filename != ':') {
 681             printf("unrecognized USB mass-storage option %s\n", filename);
 682             return NULL;
 683         }
 684         filename = p1;
 685     }
 686     if (!*filename) {
 687         printf("block device specification needed\n");
 688         return NULL;
 689     }
 690     qemu_opt_set(opts, "file", filename);
 691     qemu_opt_set(opts, "if", "none");
 692
 693     /* create host drive */
 694     dinfo = drive_init(opts, 0);
 695     if (!dinfo) {
 696         qemu_opts_del(opts);
 697         return NULL;
 698     }
 699
 700     /* create guest device */
 701     dev = usb_create(bus, "usb-storage");
 702     if (!dev) {
 703         return NULL;
 704     }
 705     if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) {
 706         qdev_free(&dev->qdev);
 707         return NULL;
 708     }
 709     if (qdev_init(&dev->qdev) < 0)
 710         return NULL;
 711
 712     return dev;
 713 }
 714
 715 static const VMStateDescription vmstate_usb_msd = {
 716     .name = "usb-storage",
 717     .version_id = 1,
 718     .minimum_version_id = 1,
 719     .fields = (VMStateField []) {
 720         VMSTATE_USB_DEVICE(dev, MSDState),
 721         VMSTATE_UINT32(mode, MSDState),
 722         VMSTATE_UINT32(scsi_len, MSDState),
 723         VMSTATE_UINT32(scsi_off, MSDState),
 724         VMSTATE_UINT32(data_len, MSDState),
 725         VMSTATE_UINT32(csw.sig, MSDState),
 726         VMSTATE_UINT32(csw.tag, MSDState),
 727         VMSTATE_UINT32(csw.residue, MSDState),
 728         VMSTATE_UINT8(csw.status, MSDState),
 729         VMSTATE_END_OF_LIST()
 730     }
 731 };
 732
 733 static Property msd_properties[] = {
 734     DEFINE_BLOCK_PROPERTIES(MSDState, conf),
 735     DEFINE_PROP_BIT("removable", MSDState, removable, 0, false),
 736     DEFINE_PROP_END_OF_LIST(),
 737 };
 738
 739 static void usb_msd_class_initfn_common(ObjectClass *klass)
 740 {
 741     DeviceClass *dc = DEVICE_CLASS(klass);
 742     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
 743
 744     uc->product_desc   = "QEMU USB MSD";
 745     uc->usb_desc       = &desc;
 746     uc->cancel_packet  = usb_msd_cancel_io;
 747     uc->handle_attach  = usb_desc_attach;
 748     uc->handle_reset   = usb_msd_handle_reset;
 749     uc->handle_control = usb_msd_handle_control;
 750     uc->handle_data    = usb_msd_handle_data;
 751     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 752     dc->fw_name = "storage";
 753     dc->vmsd = &vmstate_usb_msd;
 754 }
 755
 756 static void usb_msd_class_initfn_storage(ObjectClass *klass, void *data)
 757 {
 758     DeviceClass *dc = DEVICE_CLASS(klass);
 759     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
 760
 761     uc->init = usb_msd_initfn_storage;
 762     dc->props = msd_properties;
 763     usb_msd_class_initfn_common(klass);
 764 }
 765
 766 static void usb_msd_class_initfn_bot(ObjectClass *klass, void *data)
 767 {
 768     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
 769
 770     uc->init = usb_msd_initfn_bot;
 771     usb_msd_class_initfn_common(klass);
 772 }
 773
 774 static const TypeInfo msd_info = {
 775     .name          = "usb-storage",
 776     .parent        = TYPE_USB_DEVICE,
 777     .instance_size = sizeof(MSDState),
 778     .class_init    = usb_msd_class_initfn_storage,
 779 };
 780
 781 static const TypeInfo bot_info = {
 782     .name          = "usb-bot",
 783     .parent        = TYPE_USB_DEVICE,
 784     .instance_size = sizeof(MSDState),
 785     .class_init    = usb_msd_class_initfn_bot,
 786 };
 787
 788 static void usb_msd_register_types(void)
 789 {
 790     type_register_static(&msd_info);
 791     type_register_static(&bot_info);
 792     usb_legacy_register("usb-storage", "disk", usb_msd_init);
 793 }
 794
 795 type_init(usb_msd_register_types)