hw/scsi/scsi-generic.c

   1 /*
   2  * Generic SCSI Device support
   3  *
   4  * Copyright (c) 2007 Bull S.A.S.
   5  * Based on code by Paul Brook
   6  * Based on code by Fabrice Bellard
   7  *
   8  * Written by Laurent Vivier <Laurent.Vivier@bull.net>
   9  *
  10  * This code is licensed under the LGPL.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "qapi/error.h"
  16 #include "qemu-common.h"
  17 #include "qemu/error-report.h"
  18 #include "hw/scsi/scsi.h"
  19 #include "sysemu/block-backend.h"
  20 #include "sysemu/blockdev.h"
  21
  22 #ifdef __linux__
  23
  24 //#define DEBUG_SCSI
  25
  26 #ifdef DEBUG_SCSI
  27 #define DPRINTF(fmt, ...) \
  28 do { printf("scsi-generic: " fmt , ## __VA_ARGS__); } while (0)
  29 #else
  30 #define DPRINTF(fmt, ...) do {} while(0)
  31 #endif
  32
  33 #define BADF(fmt, ...) \
  34 do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0)
  35
  36 #include <scsi/sg.h>
  37 #include "block/scsi.h"
  38
  39 #define SG_ERR_DRIVER_TIMEOUT  0x06
  40 #define SG_ERR_DRIVER_SENSE    0x08
  41
  42 #define SG_ERR_DID_OK          0x00
  43 #define SG_ERR_DID_NO_CONNECT  0x01
  44 #define SG_ERR_DID_BUS_BUSY    0x02
  45 #define SG_ERR_DID_TIME_OUT    0x03
  46
  47 #ifndef MAX_UINT
  48 #define MAX_UINT ((unsigned int)-1)
  49 #endif
  50
  51 typedef struct SCSIGenericReq {
  52     SCSIRequest req;
  53     uint8_t *buf;
  54     int buflen;
  55     int len;
  56     sg_io_hdr_t io_header;
  57 } SCSIGenericReq;
  58
  59 static void scsi_generic_save_request(QEMUFile *f, SCSIRequest *req)
  60 {
  61     SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
  62
  63     qemu_put_sbe32s(f, &r->buflen);
  64     if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
  65         assert(!r->req.sg);
  66         qemu_put_buffer(f, r->buf, r->req.cmd.xfer);
  67     }
  68 }
  69
  70 static void scsi_generic_load_request(QEMUFile *f, SCSIRequest *req)
  71 {
  72     SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
  73
  74     qemu_get_sbe32s(f, &r->buflen);
  75     if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
  76         assert(!r->req.sg);
  77         qemu_get_buffer(f, r->buf, r->req.cmd.xfer);
  78     }
  79 }
  80
  81 static void scsi_free_request(SCSIRequest *req)
  82 {
  83     SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
  84
  85     g_free(r->buf);
  86 }
  87
  88 /* Helper function for command completion.  */
  89 static void scsi_command_complete_noio(SCSIGenericReq *r, int ret)
  90 {
  91     int status;
  92
  93     assert(r->req.aiocb == NULL);
  94
  95     if (r->req.io_canceled) {
  96         scsi_req_cancel_complete(&r->req);
  97         goto done;
  98     }
  99     if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
 100         r->req.sense_len = r->io_header.sb_len_wr;
 101     }
 102
 103     if (ret != 0) {
 104         switch (ret) {
 105         case -EDOM:
 106             status = TASK_SET_FULL;
 107             break;
 108         case -ENOMEM:
 109             status = CHECK_CONDITION;
 110             scsi_req_build_sense(&r->req, SENSE_CODE(TARGET_FAILURE));
 111             break;
 112         default:
 113             status = CHECK_CONDITION;
 114             scsi_req_build_sense(&r->req, SENSE_CODE(IO_ERROR));
 115             break;
 116         }
 117     } else {
 118         if (r->io_header.host_status == SG_ERR_DID_NO_CONNECT ||
 119             r->io_header.host_status == SG_ERR_DID_BUS_BUSY ||
 120             r->io_header.host_status == SG_ERR_DID_TIME_OUT ||
 121             (r->io_header.driver_status & SG_ERR_DRIVER_TIMEOUT)) {
 122             status = BUSY;
 123             BADF("Driver Timeout\n");
 124         } else if (r->io_header.host_status) {
 125             status = CHECK_CONDITION;
 126             scsi_req_build_sense(&r->req, SENSE_CODE(I_T_NEXUS_LOSS));
 127         } else if (r->io_header.status) {
 128             status = r->io_header.status;
 129         } else if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
 130             status = CHECK_CONDITION;
 131         } else {
 132             status = GOOD;
 133         }
 134     }
 135     DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
 136             r, r->req.tag, status);
 137
 138     scsi_req_complete(&r->req, status);
 139 done:
 140     scsi_req_unref(&r->req);
 141 }
 142
 143 static void scsi_command_complete(void *opaque, int ret)
 144 {
 145     SCSIGenericReq *r = (SCSIGenericReq *)opaque;
 146     SCSIDevice *s = r->req.dev;
 147
 148     assert(r->req.aiocb != NULL);
 149     r->req.aiocb = NULL;
 150
 151     aio_context_acquire(blk_get_aio_context(s->conf.blk));
 152     scsi_command_complete_noio(r, ret);
 153     aio_context_release(blk_get_aio_context(s->conf.blk));
 154 }
 155
 156 static int execute_command(BlockBackend *blk,
 157                            SCSIGenericReq *r, int direction,
 158                            BlockCompletionFunc *complete)
 159 {
 160     r->io_header.interface_id = 'S';
 161     r->io_header.dxfer_direction = direction;
 162     r->io_header.dxferp = r->buf;
 163     r->io_header.dxfer_len = r->buflen;
 164     r->io_header.cmdp = r->req.cmd.buf;
 165     r->io_header.cmd_len = r->req.cmd.len;
 166     r->io_header.mx_sb_len = sizeof(r->req.sense);
 167     r->io_header.sbp = r->req.sense;
 168     r->io_header.timeout = MAX_UINT;
 169     r->io_header.usr_ptr = r;
 170     r->io_header.flags |= SG_FLAG_DIRECT_IO;
 171
 172     r->req.aiocb = blk_aio_ioctl(blk, SG_IO, &r->io_header, complete, r);
 173     if (r->req.aiocb == NULL) {
 174         return -EIO;
 175     }
 176
 177     return 0;
 178 }
 179
 180 static void scsi_read_complete(void * opaque, int ret)
 181 {
 182     SCSIGenericReq *r = (SCSIGenericReq *)opaque;
 183     SCSIDevice *s = r->req.dev;
 184     int len;
 185
 186     assert(r->req.aiocb != NULL);
 187     r->req.aiocb = NULL;
 188
 189     aio_context_acquire(blk_get_aio_context(s->conf.blk));
 190
 191     if (ret || r->req.io_canceled) {
 192         scsi_command_complete_noio(r, ret);
 193         goto done;
 194     }
 195
 196     len = r->io_header.dxfer_len - r->io_header.resid;
 197     DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
 198
 199     r->len = -1;
 200     if (len == 0) {
 201         scsi_command_complete_noio(r, 0);
 202         goto done;
 203     }
 204
 205     /* Snoop READ CAPACITY output to set the blocksize.  */
 206     if (r->req.cmd.buf[0] == READ_CAPACITY_10 &&
 207         (ldl_be_p(&r->buf[0]) != 0xffffffffU || s->max_lba == 0)) {
 208         s->blocksize = ldl_be_p(&r->buf[4]);
 209         s->max_lba = ldl_be_p(&r->buf[0]) & 0xffffffffULL;
 210     } else if (r->req.cmd.buf[0] == SERVICE_ACTION_IN_16 &&
 211                (r->req.cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) {
 212         s->blocksize = ldl_be_p(&r->buf[8]);
 213         s->max_lba = ldq_be_p(&r->buf[0]);
 214     }
 215     blk_set_guest_block_size(s->conf.blk, s->blocksize);
 216
 217     /* Patch MODE SENSE device specific parameters if the BDS is opened
 218      * readonly.
 219      */
 220     if ((s->type == TYPE_DISK || s->type == TYPE_TAPE) &&
 221         blk_is_read_only(s->conf.blk) &&
 222         (r->req.cmd.buf[0] == MODE_SENSE ||
 223          r->req.cmd.buf[0] == MODE_SENSE_10) &&
 224         (r->req.cmd.buf[1] & 0x8) == 0) {
 225         if (r->req.cmd.buf[0] == MODE_SENSE) {
 226             r->buf[2] |= 0x80;
 227         } else  {
 228             r->buf[3] |= 0x80;
 229         }
 230     }
 231     if (s->type == TYPE_DISK &&
 232         r->req.cmd.buf[0] == INQUIRY &&
 233         r->req.cmd.buf[2] == 0xb0) {
 234         uint32_t max_transfer =
 235             blk_get_max_transfer(s->conf.blk) / s->blocksize;
 236
 237         assert(max_transfer);
 238         stl_be_p(&r->buf[8], max_transfer);
 239         /* Also take care of the opt xfer len. */
 240         stl_be_p(&r->buf[12],
 241                  MIN_NON_ZERO(max_transfer, ldl_be_p(&r->buf[12])));
 242     }
 243     scsi_req_data(&r->req, len);
 244     scsi_req_unref(&r->req);
 245
 246 done:
 247     aio_context_release(blk_get_aio_context(s->conf.blk));
 248 }
 249
 250 /* Read more data from scsi device into buffer.  */
 251 static void scsi_read_data(SCSIRequest *req)
 252 {
 253     SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
 254     SCSIDevice *s = r->req.dev;
 255     int ret;
 256
 257     DPRINTF("scsi_read_data tag=0x%x\n", req->tag);
 258
 259     /* The request is used as the AIO opaque value, so add a ref.  */
 260     scsi_req_ref(&r->req);
 261     if (r->len == -1) {
 262         scsi_command_complete_noio(r, 0);
 263         return;
 264     }
 265
 266     ret = execute_command(s->conf.blk, r, SG_DXFER_FROM_DEV,
 267                           scsi_read_complete);
 268     if (ret < 0) {
 269         scsi_command_complete_noio(r, ret);
 270     }
 271 }
 272
 273 static void scsi_write_complete(void * opaque, int ret)
 274 {
 275     SCSIGenericReq *r = (SCSIGenericReq *)opaque;
 276     SCSIDevice *s = r->req.dev;
 277
 278     DPRINTF("scsi_write_complete() ret = %d\n", ret);
 279
 280     assert(r->req.aiocb != NULL);
 281     r->req.aiocb = NULL;
 282
 283     aio_context_acquire(blk_get_aio_context(s->conf.blk));
 284
 285     if (ret || r->req.io_canceled) {
 286         scsi_command_complete_noio(r, ret);
 287         goto done;
 288     }
 289
 290     if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 &&
 291         s->type == TYPE_TAPE) {
 292         s->blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11];
 293         DPRINTF("block size %d\n", s->blocksize);
 294     }
 295
 296     scsi_command_complete_noio(r, ret);
 297
 298 done:
 299     aio_context_release(blk_get_aio_context(s->conf.blk));
 300 }
 301
 302 /* Write data to a scsi device.  Returns nonzero on failure.
 303    The transfer may complete asynchronously.  */
 304 static void scsi_write_data(SCSIRequest *req)
 305 {
 306     SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
 307     SCSIDevice *s = r->req.dev;
 308     int ret;
 309
 310     DPRINTF("scsi_write_data tag=0x%x\n", req->tag);
 311     if (r->len == 0) {
 312         r->len = r->buflen;
 313         scsi_req_data(&r->req, r->len);
 314         return;
 315     }
 316
 317     /* The request is used as the AIO opaque value, so add a ref.  */
 318     scsi_req_ref(&r->req);
 319     ret = execute_command(s->conf.blk, r, SG_DXFER_TO_DEV, scsi_write_complete);
 320     if (ret < 0) {
 321         scsi_command_complete_noio(r, ret);
 322     }
 323 }
 324
 325 /* Return a pointer to the data buffer.  */
 326 static uint8_t *scsi_get_buf(SCSIRequest *req)
 327 {
 328     SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
 329
 330     return r->buf;
 331 }
 332
 333 /* Execute a scsi command.  Returns the length of the data expected by the
 334    command.  This will be Positive for data transfers from the device
 335    (eg. disk reads), negative for transfers to the device (eg. disk writes),
 336    and zero if the command does not transfer any data.  */
 337
 338 static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
 339 {
 340     SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
 341     SCSIDevice *s = r->req.dev;
 342     int ret;
 343
 344 #ifdef DEBUG_SCSI
 345     DPRINTF("Command: data=0x%02x", cmd[0]);
 346     {
 347         int i;
 348         for (i = 1; i < r->req.cmd.len; i++) {
 349             printf(" 0x%02x", cmd[i]);
 350         }
 351         printf("\n");
 352     }
 353 #endif
 354
 355     if (r->req.cmd.xfer == 0) {
 356         g_free(r->buf);
 357         r->buflen = 0;
 358         r->buf = NULL;
 359         /* The request is used as the AIO opaque value, so add a ref.  */
 360         scsi_req_ref(&r->req);
 361         ret = execute_command(s->conf.blk, r, SG_DXFER_NONE,
 362                               scsi_command_complete);
 363         if (ret < 0) {
 364             scsi_command_complete_noio(r, ret);
 365             return 0;
 366         }
 367         return 0;
 368     }
 369
 370     if (r->buflen != r->req.cmd.xfer) {
 371         g_free(r->buf);
 372         r->buf = g_malloc(r->req.cmd.xfer);
 373         r->buflen = r->req.cmd.xfer;
 374     }
 375
 376     memset(r->buf, 0, r->buflen);
 377     r->len = r->req.cmd.xfer;
 378     if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
 379         r->len = 0;
 380         return -r->req.cmd.xfer;
 381     } else {
 382         return r->req.cmd.xfer;
 383     }
 384 }
 385
 386 static int read_naa_id(const uint8_t *p, uint64_t *p_wwn)
 387 {
 388     int i;
 389
 390     if ((p[1] & 0xF) == 3) {
 391         /* NAA designator type */
 392         if (p[3] != 8) {
 393             return -EINVAL;
 394         }
 395         *p_wwn = ldq_be_p(p + 4);
 396         return 0;
 397     }
 398
 399     if ((p[1] & 0xF) == 8) {
 400         /* SCSI name string designator type */
 401         if (p[3] < 20 || memcmp(&p[4], "naa.", 4)) {
 402             return -EINVAL;
 403         }
 404         if (p[3] > 20 && p[24] != ',') {
 405             return -EINVAL;
 406         }
 407         *p_wwn = 0;
 408         for (i = 8; i < 24; i++) {
 409             char c = qemu_toupper(p[i]);
 410             c -= (c >= '0' && c <= '9' ? '0' : 'A' - 10);
 411             *p_wwn = (*p_wwn << 4) | c;
 412         }
 413         return 0;
 414     }
 415
 416     return -EINVAL;
 417 }
 418
 419 void scsi_generic_read_device_identification(SCSIDevice *s)
 420 {
 421     uint8_t cmd[6];
 422     uint8_t buf[250];
 423     uint8_t sensebuf[8];
 424     sg_io_hdr_t io_header;
 425     int ret;
 426     int i, len;
 427
 428     memset(cmd, 0, sizeof(cmd));
 429     memset(buf, 0, sizeof(buf));
 430     cmd[0] = INQUIRY;
 431     cmd[1] = 1;
 432     cmd[2] = 0x83;
 433     cmd[4] = sizeof(buf);
 434
 435     memset(&io_header, 0, sizeof(io_header));
 436     io_header.interface_id = 'S';
 437     io_header.dxfer_direction = SG_DXFER_FROM_DEV;
 438     io_header.dxfer_len = sizeof(buf);
 439     io_header.dxferp = buf;
 440     io_header.cmdp = cmd;
 441     io_header.cmd_len = sizeof(cmd);
 442     io_header.mx_sb_len = sizeof(sensebuf);
 443     io_header.sbp = sensebuf;
 444     io_header.timeout = 6000; /* XXX */
 445
 446     ret = blk_ioctl(s->conf.blk, SG_IO, &io_header);
 447     if (ret < 0 || io_header.driver_status || io_header.host_status) {
 448         return;
 449     }
 450
 451     len = MIN((buf[2] << 8) | buf[3], sizeof(buf) - 4);
 452     for (i = 0; i + 3 <= len; ) {
 453         const uint8_t *p = &buf[i + 4];
 454         uint64_t wwn;
 455
 456         if (i + (p[3] + 4) > len) {
 457             break;
 458         }
 459
 460         if ((p[1] & 0x10) == 0) {
 461             /* Associated with the logical unit */
 462             if (read_naa_id(p, &wwn) == 0) {
 463                 s->wwn = wwn;
 464             }
 465         } else if ((p[1] & 0x10) == 0x10) {
 466             /* Associated with the target port */
 467             if (read_naa_id(p, &wwn) == 0) {
 468                 s->port_wwn = wwn;
 469             }
 470         }
 471
 472         i += p[3] + 4;
 473     }
 474 }
 475
 476 static int get_stream_blocksize(BlockBackend *blk)
 477 {
 478     uint8_t cmd[6];
 479     uint8_t buf[12];
 480     uint8_t sensebuf[8];
 481     sg_io_hdr_t io_header;
 482     int ret;
 483
 484     memset(cmd, 0, sizeof(cmd));
 485     memset(buf, 0, sizeof(buf));
 486     cmd[0] = MODE_SENSE;
 487     cmd[4] = sizeof(buf);
 488
 489     memset(&io_header, 0, sizeof(io_header));
 490     io_header.interface_id = 'S';
 491     io_header.dxfer_direction = SG_DXFER_FROM_DEV;
 492     io_header.dxfer_len = sizeof(buf);
 493     io_header.dxferp = buf;
 494     io_header.cmdp = cmd;
 495     io_header.cmd_len = sizeof(cmd);
 496     io_header.mx_sb_len = sizeof(sensebuf);
 497     io_header.sbp = sensebuf;
 498     io_header.timeout = 6000; /* XXX */
 499
 500     ret = blk_ioctl(blk, SG_IO, &io_header);
 501     if (ret < 0 || io_header.driver_status || io_header.host_status) {
 502         return -1;
 503     }
 504     return (buf[9] << 16) | (buf[10] << 8) | buf[11];
 505 }
 506
 507 static void scsi_generic_reset(DeviceState *dev)
 508 {
 509     SCSIDevice *s = SCSI_DEVICE(dev);
 510
 511     scsi_device_purge_requests(s, SENSE_CODE(RESET));
 512 }
 513
 514 static void scsi_generic_realize(SCSIDevice *s, Error **errp)
 515 {
 516     int rc;
 517     int sg_version;
 518     struct sg_scsi_id scsiid;
 519
 520     if (!s->conf.blk) {
 521         error_setg(errp, "drive property not set");
 522         return;
 523     }
 524
 525     if (blk_get_on_error(s->conf.blk, 0) != BLOCKDEV_ON_ERROR_ENOSPC) {
 526         error_setg(errp, "Device doesn't support drive option werror");
 527         return;
 528     }
 529     if (blk_get_on_error(s->conf.blk, 1) != BLOCKDEV_ON_ERROR_REPORT) {
 530         error_setg(errp, "Device doesn't support drive option rerror");
 531         return;
 532     }
 533
 534     /* check we are using a driver managing SG_IO (version 3 and after */
 535     rc = blk_ioctl(s->conf.blk, SG_GET_VERSION_NUM, &sg_version);
 536     if (rc < 0) {
 537         error_setg(errp, "cannot get SG_IO version number: %s.  "
 538                          "Is this a SCSI device?",
 539                          strerror(-rc));
 540         return;
 541     }
 542     if (sg_version < 30000) {
 543         error_setg(errp, "scsi generic interface too old");
 544         return;
 545     }
 546
 547     /* get LUN of the /dev/sg? */
 548     if (blk_ioctl(s->conf.blk, SG_GET_SCSI_ID, &scsiid)) {
 549         error_setg(errp, "SG_GET_SCSI_ID ioctl failed");
 550         return;
 551     }
 552
 553     /* define device state */
 554     s->type = scsiid.scsi_type;
 555     DPRINTF("device type %d\n", s->type);
 556
 557     switch (s->type) {
 558     case TYPE_TAPE:
 559         s->blocksize = get_stream_blocksize(s->conf.blk);
 560         if (s->blocksize == -1) {
 561             s->blocksize = 0;
 562         }
 563         break;
 564
 565         /* Make a guess for block devices, we'll fix it when the guest sends.
 566          * READ CAPACITY.  If they don't, they likely would assume these sizes
 567          * anyway. (TODO: they could also send MODE SENSE).
 568          */
 569     case TYPE_ROM:
 570     case TYPE_WORM:
 571         s->blocksize = 2048;
 572         break;
 573     default:
 574         s->blocksize = 512;
 575         break;
 576     }
 577
 578     DPRINTF("block size %d\n", s->blocksize);
 579
 580     scsi_generic_read_device_identification(s);
 581 }
 582
 583 const SCSIReqOps scsi_generic_req_ops = {
 584     .size         = sizeof(SCSIGenericReq),
 585     .free_req     = scsi_free_request,
 586     .send_command = scsi_send_command,
 587     .read_data    = scsi_read_data,
 588     .write_data   = scsi_write_data,
 589     .get_buf      = scsi_get_buf,
 590     .load_request = scsi_generic_load_request,
 591     .save_request = scsi_generic_save_request,
 592 };
 593
 594 static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
 595                                      uint8_t *buf, void *hba_private)
 596 {
 597     return scsi_req_alloc(&scsi_generic_req_ops, d, tag, lun, hba_private);
 598 }
 599
 600 static Property scsi_generic_properties[] = {
 601     DEFINE_PROP_DRIVE("drive", SCSIDevice, conf.blk),
 602     DEFINE_PROP_END_OF_LIST(),
 603 };
 604
 605 static int scsi_generic_parse_cdb(SCSIDevice *dev, SCSICommand *cmd,
 606                                   uint8_t *buf, void *hba_private)
 607 {
 608     return scsi_bus_parse_cdb(dev, cmd, buf, hba_private);
 609 }
 610
 611 static void scsi_generic_class_initfn(ObjectClass *klass, void *data)
 612 {
 613     DeviceClass *dc = DEVICE_CLASS(klass);
 614     SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
 615
 616     sc->realize      = scsi_generic_realize;
 617     sc->alloc_req    = scsi_new_request;
 618     sc->parse_cdb    = scsi_generic_parse_cdb;
 619     dc->fw_name = "disk";
 620     dc->desc = "pass through generic scsi device (/dev/sg*)";
 621     dc->reset = scsi_generic_reset;
 622     dc->props = scsi_generic_properties;
 623     dc->vmsd  = &vmstate_scsi_device;
 624 }
 625
 626 static const TypeInfo scsi_generic_info = {
 627     .name          = "scsi-generic",
 628     .parent        = TYPE_SCSI_DEVICE,
 629     .instance_size = sizeof(SCSIDevice),
 630     .class_init    = scsi_generic_class_initfn,
 631 };
 632
 633 static void scsi_generic_register_types(void)
 634 {
 635     type_register_static(&scsi_generic_info);
 636 }
 637
 638 type_init(scsi_generic_register_types)
 639
 640 #endif /* __linux__ */