block/raw-posix.c

   1 /*
   2  * Block driver for RAW files (posix)
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "qemu-common.h"
  25 #include "qemu-timer.h"
  26 #include "qemu-char.h"
  27 #include "qemu-log.h"
  28 #include "block_int.h"
  29 #include "module.h"
  30 #include "block/raw-posix-aio.h"
  31
  32 #ifdef CONFIG_COCOA
  33 #include <paths.h>
  34 #include <sys/param.h>
  35 #include <IOKit/IOKitLib.h>
  36 #include <IOKit/IOBSD.h>
  37 #include <IOKit/storage/IOMediaBSDClient.h>
  38 #include <IOKit/storage/IOMedia.h>
  39 #include <IOKit/storage/IOCDMedia.h>
  40 //#include <IOKit/storage/IOCDTypes.h>
  41 #include <CoreFoundation/CoreFoundation.h>
  42 #endif
  43
  44 #ifdef __sun__
  45 #define _POSIX_PTHREAD_SEMANTICS 1
  46 #include <signal.h>
  47 #include <sys/dkio.h>
  48 #endif
  49 #ifdef __linux__
  50 #include <sys/ioctl.h>
  51 #include <linux/cdrom.h>
  52 #include <linux/fd.h>
  53 #endif
  54 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
  55 #include <signal.h>
  56 #include <sys/disk.h>
  57 #include <sys/cdio.h>
  58 #endif
  59
  60 #ifdef __OpenBSD__
  61 #include <sys/ioctl.h>
  62 #include <sys/disklabel.h>
  63 #include <sys/dkio.h>
  64 #endif
  65
  66 #ifdef __DragonFly__
  67 #include <sys/ioctl.h>
  68 #include <sys/diskslice.h>
  69 #endif
  70
  71 //#define DEBUG_FLOPPY
  72
  73 //#define DEBUG_BLOCK
  74 #if defined(DEBUG_BLOCK)
  75 #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \
  76     { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0)
  77 #else
  78 #define DEBUG_BLOCK_PRINT(formatCstr, ...)
  79 #endif
  80
  81 /* OS X does not have O_DSYNC */
  82 #ifndef O_DSYNC
  83 #ifdef O_SYNC
  84 #define O_DSYNC O_SYNC
  85 #elif defined(O_FSYNC)
  86 #define O_DSYNC O_FSYNC
  87 #endif
  88 #endif
  89
  90 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
  91 #ifndef O_DIRECT
  92 #define O_DIRECT O_DSYNC
  93 #endif
  94
  95 #define FTYPE_FILE   0
  96 #define FTYPE_CD     1
  97 #define FTYPE_FD     2
  98
  99 #define ALIGNED_BUFFER_SIZE (32 * 512)
 100
 101 /* if the FD is not accessed during that time (in ms), we try to
 102    reopen it to see if the disk has been changed */
 103 #define FD_OPEN_TIMEOUT 1000
 104
 105 typedef struct BDRVRawState {
 106     int fd;
 107     int type;
 108     unsigned int lseek_err_cnt;
 109     int open_flags;
 110 #if defined(__linux__)
 111     /* linux floppy specific */
 112     int64_t fd_open_time;
 113     int64_t fd_error_time;
 114     int fd_got_error;
 115     int fd_media_changed;
 116 #endif
 117 #ifdef CONFIG_LINUX_AIO
 118     int use_aio;
 119     void *aio_ctx;
 120 #endif
 121     uint8_t* aligned_buf;
 122 } BDRVRawState;
 123
 124 static int fd_open(BlockDriverState *bs);
 125 static int64_t raw_getlength(BlockDriverState *bs);
 126
 127 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 128 static int cdrom_reopen(BlockDriverState *bs);
 129 #endif
 130
 131 static int raw_open_common(BlockDriverState *bs, const char *filename,
 132                            int bdrv_flags, int open_flags)
 133 {
 134     BDRVRawState *s = bs->opaque;
 135     int fd, ret;
 136
 137     s->lseek_err_cnt = 0;
 138
 139     s->open_flags = open_flags | O_BINARY;
 140     s->open_flags &= ~O_ACCMODE;
 141     if (bdrv_flags & BDRV_O_RDWR) {
 142         s->open_flags |= O_RDWR;
 143     } else {
 144         s->open_flags |= O_RDONLY;
 145         bs->read_only = 1;
 146     }
 147
 148     /* Use O_DSYNC for write-through caching, no flags for write-back caching,
 149      * and O_DIRECT for no caching. */
 150     if ((bdrv_flags & BDRV_O_NOCACHE))
 151         s->open_flags |= O_DIRECT;
 152     else if (!(bdrv_flags & BDRV_O_CACHE_WB))
 153         s->open_flags |= O_DSYNC;
 154
 155     s->fd = -1;
 156     fd = qemu_open(filename, s->open_flags, 0644);
 157     if (fd < 0) {
 158         ret = -errno;
 159         if (ret == -EROFS)
 160             ret = -EACCES;
 161         return ret;
 162     }
 163     s->fd = fd;
 164     s->aligned_buf = NULL;
 165
 166     if ((bdrv_flags & BDRV_O_NOCACHE)) {
 167         s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
 168         if (s->aligned_buf == NULL) {
 169             goto out_close;
 170         }
 171     }
 172
 173 #ifdef CONFIG_LINUX_AIO
 174     if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
 175                       (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
 176
 177         /* We're falling back to POSIX AIO in some cases */
 178         paio_init();
 179
 180         s->aio_ctx = laio_init();
 181         if (!s->aio_ctx) {
 182             goto out_free_buf;
 183         }
 184         s->use_aio = 1;
 185     } else
 186 #endif
 187     {
 188         if (paio_init() < 0) {
 189             goto out_free_buf;
 190         }
 191 #ifdef CONFIG_LINUX_AIO
 192         s->use_aio = 0;
 193 #endif
 194     }
 195
 196     return 0;
 197
 198 out_free_buf:
 199     qemu_vfree(s->aligned_buf);
 200 out_close:
 201     close(fd);
 202     return -errno;
 203 }
 204
 205 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 206 {
 207     BDRVRawState *s = bs->opaque;
 208
 209     s->type = FTYPE_FILE;
 210     return raw_open_common(bs, filename, flags, 0);
 211 }
 212
 213 /* XXX: use host sector size if necessary with:
 214 #ifdef DIOCGSECTORSIZE
 215         {
 216             unsigned int sectorsize = 512;
 217             if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
 218                 sectorsize > bufsize)
 219                 bufsize = sectorsize;
 220         }
 221 #endif
 222 #ifdef CONFIG_COCOA
 223         u_int32_t   blockSize = 512;
 224         if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
 225             bufsize = blockSize;
 226         }
 227 #endif
 228 */
 229
 230 /*
 231  * offset and count are in bytes, but must be multiples of 512 for files
 232  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 233  *
 234  * This function may be called without alignment if the caller ensures
 235  * that O_DIRECT is not in effect.
 236  */
 237 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
 238                      uint8_t *buf, int count)
 239 {
 240     BDRVRawState *s = bs->opaque;
 241     int ret;
 242
 243     ret = fd_open(bs);
 244     if (ret < 0)
 245         return ret;
 246
 247     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
 248         ++(s->lseek_err_cnt);
 249         if(s->lseek_err_cnt <= 10) {
 250             DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 251                               "] lseek failed : %d = %s\n",
 252                               s->fd, bs->filename, offset, buf, count,
 253                               bs->total_sectors, errno, strerror(errno));
 254         }
 255         return -1;
 256     }
 257     s->lseek_err_cnt=0;
 258
 259     ret = read(s->fd, buf, count);
 260     if (ret == count)
 261         goto label__raw_read__success;
 262
 263     /* Allow reads beyond the end (needed for pwrite) */
 264     if ((ret == 0) && bs->growable) {
 265         int64_t size = raw_getlength(bs);
 266         if (offset >= size) {
 267             memset(buf, 0, count);
 268             ret = count;
 269             goto label__raw_read__success;
 270         }
 271     }
 272
 273     DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 274                       "] read failed %d : %d = %s\n",
 275                       s->fd, bs->filename, offset, buf, count,
 276                       bs->total_sectors, ret, errno, strerror(errno));
 277
 278     /* Try harder for CDrom. */
 279     if (bs->type == BDRV_TYPE_CDROM) {
 280         lseek(s->fd, offset, SEEK_SET);
 281         ret = read(s->fd, buf, count);
 282         if (ret == count)
 283             goto label__raw_read__success;
 284         lseek(s->fd, offset, SEEK_SET);
 285         ret = read(s->fd, buf, count);
 286         if (ret == count)
 287             goto label__raw_read__success;
 288
 289         DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 290                           "] retry read failed %d : %d = %s\n",
 291                           s->fd, bs->filename, offset, buf, count,
 292                           bs->total_sectors, ret, errno, strerror(errno));
 293     }
 294
 295 label__raw_read__success:
 296
 297     return  (ret < 0) ? -errno : ret;
 298 }
 299
 300 /*
 301  * offset and count are in bytes, but must be multiples of 512 for files
 302  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 303  *
 304  * This function may be called without alignment if the caller ensures
 305  * that O_DIRECT is not in effect.
 306  */
 307 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
 308                       const uint8_t *buf, int count)
 309 {
 310     BDRVRawState *s = bs->opaque;
 311     int ret;
 312
 313     ret = fd_open(bs);
 314     if (ret < 0)
 315         return -errno;
 316
 317     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
 318         ++(s->lseek_err_cnt);
 319         if(s->lseek_err_cnt) {
 320             DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
 321                               PRId64 "] lseek failed : %d = %s\n",
 322                               s->fd, bs->filename, offset, buf, count,
 323                               bs->total_sectors, errno, strerror(errno));
 324         }
 325         return -EIO;
 326     }
 327     s->lseek_err_cnt = 0;
 328
 329     ret = write(s->fd, buf, count);
 330     if (ret == count)
 331         goto label__raw_write__success;
 332
 333     DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 334                       "] write failed %d : %d = %s\n",
 335                       s->fd, bs->filename, offset, buf, count,
 336                       bs->total_sectors, ret, errno, strerror(errno));
 337
 338 label__raw_write__success:
 339
 340     return  (ret < 0) ? -errno : ret;
 341 }
 342
 343
 344 /*
 345  * offset and count are in bytes and possibly not aligned. For files opened
 346  * with O_DIRECT, necessary alignments are ensured before calling
 347  * raw_pread_aligned to do the actual read.
 348  */
 349 static int raw_pread(BlockDriverState *bs, int64_t offset,
 350                      uint8_t *buf, int count)
 351 {
 352     BDRVRawState *s = bs->opaque;
 353     int size, ret, shift, sum;
 354
 355     sum = 0;
 356
 357     if (s->aligned_buf != NULL)  {
 358
 359         if (offset & 0x1ff) {
 360             /* align offset on a 512 bytes boundary */
 361
 362             shift = offset & 0x1ff;
 363             size = (shift + count + 0x1ff) & ~0x1ff;
 364             if (size > ALIGNED_BUFFER_SIZE)
 365                 size = ALIGNED_BUFFER_SIZE;
 366             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
 367             if (ret < 0)
 368                 return ret;
 369
 370             size = 512 - shift;
 371             if (size > count)
 372                 size = count;
 373             memcpy(buf, s->aligned_buf + shift, size);
 374
 375             buf += size;
 376             offset += size;
 377             count -= size;
 378             sum += size;
 379
 380             if (count == 0)
 381                 return sum;
 382         }
 383         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 384
 385             /* read on aligned buffer */
 386
 387             while (count) {
 388
 389                 size = (count + 0x1ff) & ~0x1ff;
 390                 if (size > ALIGNED_BUFFER_SIZE)
 391                     size = ALIGNED_BUFFER_SIZE;
 392
 393                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
 394                 if (ret < 0)
 395                     return ret;
 396
 397                 size = ret;
 398                 if (size > count)
 399                     size = count;
 400
 401                 memcpy(buf, s->aligned_buf, size);
 402
 403                 buf += size;
 404                 offset += size;
 405                 count -= size;
 406                 sum += size;
 407             }
 408
 409             return sum;
 410         }
 411     }
 412
 413     return raw_pread_aligned(bs, offset, buf, count) + sum;
 414 }
 415
 416 static int raw_read(BlockDriverState *bs, int64_t sector_num,
 417                     uint8_t *buf, int nb_sectors)
 418 {
 419     int ret;
 420
 421     ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
 422     if (ret == (nb_sectors * 512))
 423         ret = 0;
 424     return ret;
 425 }
 426
 427 /*
 428  * offset and count are in bytes and possibly not aligned. For files opened
 429  * with O_DIRECT, necessary alignments are ensured before calling
 430  * raw_pwrite_aligned to do the actual write.
 431  */
 432 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 433                       const uint8_t *buf, int count)
 434 {
 435     BDRVRawState *s = bs->opaque;
 436     int size, ret, shift, sum;
 437
 438     sum = 0;
 439
 440     if (s->aligned_buf != NULL) {
 441
 442         if (offset & 0x1ff) {
 443             /* align offset on a 512 bytes boundary */
 444             shift = offset & 0x1ff;
 445             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
 446             if (ret < 0)
 447                 return ret;
 448
 449             size = 512 - shift;
 450             if (size > count)
 451                 size = count;
 452             memcpy(s->aligned_buf + shift, buf, size);
 453
 454             ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
 455             if (ret < 0)
 456                 return ret;
 457
 458             buf += size;
 459             offset += size;
 460             count -= size;
 461             sum += size;
 462
 463             if (count == 0)
 464                 return sum;
 465         }
 466         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 467
 468             while ((size = (count & ~0x1ff)) != 0) {
 469
 470                 if (size > ALIGNED_BUFFER_SIZE)
 471                     size = ALIGNED_BUFFER_SIZE;
 472
 473                 memcpy(s->aligned_buf, buf, size);
 474
 475                 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
 476                 if (ret < 0)
 477                     return ret;
 478
 479                 buf += ret;
 480                 offset += ret;
 481                 count -= ret;
 482                 sum += ret;
 483             }
 484             /* here, count < 512 because (count & ~0x1ff) == 0 */
 485             if (count) {
 486                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
 487                 if (ret < 0)
 488                     return ret;
 489                  memcpy(s->aligned_buf, buf, count);
 490
 491                  ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
 492                  if (ret < 0)
 493                      return ret;
 494                  if (count < ret)
 495                      ret = count;
 496
 497                  sum += ret;
 498             }
 499             return sum;
 500         }
 501     }
 502     return raw_pwrite_aligned(bs, offset, buf, count) + sum;
 503 }
 504
 505 static int raw_write(BlockDriverState *bs, int64_t sector_num,
 506                      const uint8_t *buf, int nb_sectors)
 507 {
 508     int ret;
 509     ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
 510     if (ret == (nb_sectors * 512))
 511         ret = 0;
 512     return ret;
 513 }
 514
 515 /*
 516  * Check if all memory in this vector is sector aligned.
 517  */
 518 static int qiov_is_aligned(QEMUIOVector *qiov)
 519 {
 520     int i;
 521
 522     for (i = 0; i < qiov->niov; i++) {
 523         if ((uintptr_t) qiov->iov[i].iov_base % 512) {
 524             return 0;
 525         }
 526     }
 527
 528     return 1;
 529 }
 530
 531 static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
 532         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 533         BlockDriverCompletionFunc *cb, void *opaque, int type)
 534 {
 535     BDRVRawState *s = bs->opaque;
 536
 537     if (fd_open(bs) < 0)
 538         return NULL;
 539
 540     /*
 541      * If O_DIRECT is used the buffer needs to be aligned on a sector
 542      * boundary.  Check if this is the case or telll the low-level
 543      * driver that it needs to copy the buffer.
 544      */
 545     if (s->aligned_buf) {
 546         if (!qiov_is_aligned(qiov)) {
 547             type |= QEMU_AIO_MISALIGNED;
 548 #ifdef CONFIG_LINUX_AIO
 549         } else if (s->use_aio) {
 550             return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
 551                                nb_sectors, cb, opaque, type);
 552 #endif
 553         }
 554     }
 555
 556     return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
 557                        cb, opaque, type);
 558 }
 559
 560 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
 561         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 562         BlockDriverCompletionFunc *cb, void *opaque)
 563 {
 564     return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
 565                           cb, opaque, QEMU_AIO_READ);
 566 }
 567
 568 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
 569         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 570         BlockDriverCompletionFunc *cb, void *opaque)
 571 {
 572     return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
 573                           cb, opaque, QEMU_AIO_WRITE);
 574 }
 575
 576 static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
 577         BlockDriverCompletionFunc *cb, void *opaque)
 578 {
 579     BDRVRawState *s = bs->opaque;
 580
 581     if (fd_open(bs) < 0)
 582         return NULL;
 583
 584     return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
 585 }
 586
 587 static void raw_close(BlockDriverState *bs)
 588 {
 589     BDRVRawState *s = bs->opaque;
 590     if (s->fd >= 0) {
 591         close(s->fd);
 592         s->fd = -1;
 593         if (s->aligned_buf != NULL)
 594             qemu_free(s->aligned_buf);
 595     }
 596 }
 597
 598 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 599 {
 600     BDRVRawState *s = bs->opaque;
 601     if (s->type != FTYPE_FILE)
 602         return -ENOTSUP;
 603     if (ftruncate(s->fd, offset) < 0)
 604         return -errno;
 605     return 0;
 606 }
 607
 608 #ifdef __OpenBSD__
 609 static int64_t raw_getlength(BlockDriverState *bs)
 610 {
 611     BDRVRawState *s = bs->opaque;
 612     int fd = s->fd;
 613     struct stat st;
 614
 615     if (fstat(fd, &st))
 616         return -1;
 617     if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
 618         struct disklabel dl;
 619
 620         if (ioctl(fd, DIOCGDINFO, &dl))
 621             return -1;
 622         return (uint64_t)dl.d_secsize *
 623             dl.d_partitions[DISKPART(st.st_rdev)].p_size;
 624     } else
 625         return st.st_size;
 626 }
 627 #else /* !__OpenBSD__ */
 628 static int64_t  raw_getlength(BlockDriverState *bs)
 629 {
 630     BDRVRawState *s = bs->opaque;
 631     int fd = s->fd;
 632     int64_t size;
 633 #ifdef CONFIG_BSD
 634     struct stat sb;
 635 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
 636     int reopened = 0;
 637 #endif
 638 #endif
 639 #ifdef __sun__
 640     struct dk_minfo minfo;
 641     int rv;
 642 #endif
 643     int ret;
 644
 645     ret = fd_open(bs);
 646     if (ret < 0)
 647         return ret;
 648
 649 #ifdef CONFIG_BSD
 650 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
 651 again:
 652 #endif
 653     if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
 654 #ifdef DIOCGMEDIASIZE
 655         if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
 656 #elif defined(DIOCGPART)
 657         {
 658                 struct partinfo pi;
 659                 if (ioctl(fd, DIOCGPART, &pi) == 0)
 660                         size = pi.media_size;
 661                 else
 662                         size = 0;
 663         }
 664         if (size == 0)
 665 #endif
 666 #ifdef CONFIG_COCOA
 667         size = LONG_LONG_MAX;
 668 #else
 669         size = lseek(fd, 0LL, SEEK_END);
 670 #endif
 671 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 672         switch(s->type) {
 673         case FTYPE_CD:
 674             /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
 675             if (size == 2048LL * (unsigned)-1)
 676                 size = 0;
 677             /* XXX no disc?  maybe we need to reopen... */
 678             if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
 679                 reopened = 1;
 680                 goto again;
 681             }
 682         }
 683 #endif
 684     } else
 685 #endif
 686 #ifdef __sun__
 687     /*
 688      * use the DKIOCGMEDIAINFO ioctl to read the size.
 689      */
 690     rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
 691     if ( rv != -1 ) {
 692         size = minfo.dki_lbsize * minfo.dki_capacity;
 693     } else /* there are reports that lseek on some devices
 694               fails, but irc discussion said that contingency
 695               on contingency was overkill */
 696 #endif
 697     {
 698         size = lseek(fd, 0, SEEK_END);
 699     }
 700     return size;
 701 }
 702 #endif
 703
 704 static int raw_create(const char *filename, QEMUOptionParameter *options)
 705 {
 706     int fd;
 707     int result = 0;
 708     int64_t total_size = 0;
 709
 710     /* Read out options */
 711     while (options && options->name) {
 712         if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
 713             total_size = options->value.n / 512;
 714         }
 715         options++;
 716     }
 717
 718     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 719               0644);
 720     if (fd < 0) {
 721         result = -errno;
 722     } else {
 723         if (ftruncate(fd, total_size * 512) != 0) {
 724             result = -errno;
 725         }
 726         if (close(fd) != 0) {
 727             result = -errno;
 728         }
 729     }
 730     return result;
 731 }
 732
 733 static void raw_flush(BlockDriverState *bs)
 734 {
 735     BDRVRawState *s = bs->opaque;
 736     qemu_fdatasync(s->fd);
 737 }
 738
 739
 740 static QEMUOptionParameter raw_create_options[] = {
 741     {
 742         .name = BLOCK_OPT_SIZE,
 743         .type = OPT_SIZE,
 744         .help = "Virtual disk size"
 745     },
 746     { NULL }
 747 };
 748
 749 static BlockDriver bdrv_raw = {
 750     .format_name = "raw",
 751     .instance_size = sizeof(BDRVRawState),
 752     .bdrv_probe = NULL, /* no probe for protocols */
 753     .bdrv_open = raw_open,
 754     .bdrv_read = raw_read,
 755     .bdrv_write = raw_write,
 756     .bdrv_close = raw_close,
 757     .bdrv_create = raw_create,
 758     .bdrv_flush = raw_flush,
 759
 760     .bdrv_aio_readv = raw_aio_readv,
 761     .bdrv_aio_writev = raw_aio_writev,
 762     .bdrv_aio_flush = raw_aio_flush,
 763
 764     .bdrv_truncate = raw_truncate,
 765     .bdrv_getlength = raw_getlength,
 766
 767     .create_options = raw_create_options,
 768 };
 769
 770 /***********************************************/
 771 /* host device */
 772
 773 #ifdef CONFIG_COCOA
 774 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
 775 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
 776
 777 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
 778 {
 779     kern_return_t       kernResult;
 780     mach_port_t     masterPort;
 781     CFMutableDictionaryRef  classesToMatch;
 782
 783     kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
 784     if ( KERN_SUCCESS != kernResult ) {
 785         printf( "IOMasterPort returned %d\n", kernResult );
 786     }
 787
 788     classesToMatch = IOServiceMatching( kIOCDMediaClass );
 789     if ( classesToMatch == NULL ) {
 790         printf( "IOServiceMatching returned a NULL dictionary.\n" );
 791     } else {
 792     CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
 793     }
 794     kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
 795     if ( KERN_SUCCESS != kernResult )
 796     {
 797         printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
 798     }
 799
 800     return kernResult;
 801 }
 802
 803 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
 804 {
 805     io_object_t     nextMedia;
 806     kern_return_t   kernResult = KERN_FAILURE;
 807     *bsdPath = '\0';
 808     nextMedia = IOIteratorNext( mediaIterator );
 809     if ( nextMedia )
 810     {
 811         CFTypeRef   bsdPathAsCFString;
 812     bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
 813         if ( bsdPathAsCFString ) {
 814             size_t devPathLength;
 815             strcpy( bsdPath, _PATH_DEV );
 816             strcat( bsdPath, "r" );
 817             devPathLength = strlen( bsdPath );
 818             if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
 819                 kernResult = KERN_SUCCESS;
 820             }
 821             CFRelease( bsdPathAsCFString );
 822         }
 823         IOObjectRelease( nextMedia );
 824     }
 825
 826     return kernResult;
 827 }
 828
 829 #endif
 830
 831 static int hdev_probe_device(const char *filename)
 832 {
 833     struct stat st;
 834
 835     /* allow a dedicated CD-ROM driver to match with a higher priority */
 836     if (strstart(filename, "/dev/cdrom", NULL))
 837         return 50;
 838
 839     if (stat(filename, &st) >= 0 &&
 840             (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
 841         return 100;
 842     }
 843
 844     return 0;
 845 }
 846
 847 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
 848 {
 849     BDRVRawState *s = bs->opaque;
 850
 851 #ifdef CONFIG_COCOA
 852     if (strstart(filename, "/dev/cdrom", NULL)) {
 853         kern_return_t kernResult;
 854         io_iterator_t mediaIterator;
 855         char bsdPath[ MAXPATHLEN ];
 856         int fd;
 857
 858         kernResult = FindEjectableCDMedia( &mediaIterator );
 859         kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
 860
 861         if ( bsdPath[ 0 ] != '\0' ) {
 862             strcat(bsdPath,"s0");
 863             /* some CDs don't have a partition 0 */
 864             fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
 865             if (fd < 0) {
 866                 bsdPath[strlen(bsdPath)-1] = '1';
 867             } else {
 868                 close(fd);
 869             }
 870             filename = bsdPath;
 871         }
 872
 873         if ( mediaIterator )
 874             IOObjectRelease( mediaIterator );
 875     }
 876 #endif
 877
 878     s->type = FTYPE_FILE;
 879 #if defined(__linux__)
 880     if (strstart(filename, "/dev/sg", NULL)) {
 881         bs->sg = 1;
 882     }
 883 #endif
 884
 885     return raw_open_common(bs, filename, flags, 0);
 886 }
 887
 888 #if defined(__linux__)
 889 /* Note: we do not have a reliable method to detect if the floppy is
 890    present. The current method is to try to open the floppy at every
 891    I/O and to keep it opened during a few hundreds of ms. */
 892 static int fd_open(BlockDriverState *bs)
 893 {
 894     BDRVRawState *s = bs->opaque;
 895     int last_media_present;
 896
 897     if (s->type != FTYPE_FD)
 898         return 0;
 899     last_media_present = (s->fd >= 0);
 900     if (s->fd >= 0 &&
 901         (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
 902         close(s->fd);
 903         s->fd = -1;
 904 #ifdef DEBUG_FLOPPY
 905         printf("Floppy closed\n");
 906 #endif
 907     }
 908     if (s->fd < 0) {
 909         if (s->fd_got_error &&
 910             (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
 911 #ifdef DEBUG_FLOPPY
 912             printf("No floppy (open delayed)\n");
 913 #endif
 914             return -EIO;
 915         }
 916         s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK);
 917         if (s->fd < 0) {
 918             s->fd_error_time = qemu_get_clock(rt_clock);
 919             s->fd_got_error = 1;
 920             if (last_media_present)
 921                 s->fd_media_changed = 1;
 922 #ifdef DEBUG_FLOPPY
 923             printf("No floppy\n");
 924 #endif
 925             return -EIO;
 926         }
 927 #ifdef DEBUG_FLOPPY
 928         printf("Floppy opened\n");
 929 #endif
 930     }
 931     if (!last_media_present)
 932         s->fd_media_changed = 1;
 933     s->fd_open_time = qemu_get_clock(rt_clock);
 934     s->fd_got_error = 0;
 935     return 0;
 936 }
 937
 938 static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
 939 {
 940     BDRVRawState *s = bs->opaque;
 941
 942     return ioctl(s->fd, req, buf);
 943 }
 944
 945 static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
 946         unsigned long int req, void *buf,
 947         BlockDriverCompletionFunc *cb, void *opaque)
 948 {
 949     BDRVRawState *s = bs->opaque;
 950
 951     if (fd_open(bs) < 0)
 952         return NULL;
 953     return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
 954 }
 955
 956 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 957 static int fd_open(BlockDriverState *bs)
 958 {
 959     BDRVRawState *s = bs->opaque;
 960
 961     /* this is just to ensure s->fd is sane (its called by io ops) */
 962     if (s->fd >= 0)
 963         return 0;
 964     return -EIO;
 965 }
 966 #else /* !linux && !FreeBSD */
 967
 968 static int fd_open(BlockDriverState *bs)
 969 {
 970     return 0;
 971 }
 972
 973 #endif /* !linux && !FreeBSD */
 974
 975 static int hdev_create(const char *filename, QEMUOptionParameter *options)
 976 {
 977     int fd;
 978     int ret = 0;
 979     struct stat stat_buf;
 980     int64_t total_size = 0;
 981
 982     /* Read out options */
 983     while (options && options->name) {
 984         if (!strcmp(options->name, "size")) {
 985             total_size = options->value.n / 512;
 986         }
 987         options++;
 988     }
 989
 990     fd = open(filename, O_WRONLY | O_BINARY);
 991     if (fd < 0)
 992         return -EIO;
 993
 994     if (fstat(fd, &stat_buf) < 0)
 995         ret = -EIO;
 996     else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
 997         ret = -EIO;
 998     else if (lseek(fd, 0, SEEK_END) < total_size * 512)
 999         ret = -ENOSPC;
1000
1001     close(fd);
1002     return ret;
1003 }
1004
1005 static BlockDriver bdrv_host_device = {
1006     .format_name        = "host_device",
1007     .instance_size      = sizeof(BDRVRawState),
1008     .bdrv_probe_device  = hdev_probe_device,
1009     .bdrv_open          = hdev_open,
1010     .bdrv_close         = raw_close,
1011     .bdrv_create        = hdev_create,
1012     .create_options     = raw_create_options,
1013     .no_zero_init       = 1,
1014     .bdrv_flush         = raw_flush,
1015
1016     .bdrv_aio_readv     = raw_aio_readv,
1017     .bdrv_aio_writev    = raw_aio_writev,
1018     .bdrv_aio_flush     = raw_aio_flush,
1019
1020     .bdrv_read          = raw_read,
1021     .bdrv_write         = raw_write,
1022     .bdrv_getlength     = raw_getlength,
1023
1024     /* generic scsi device */
1025 #ifdef __linux__
1026     .bdrv_ioctl         = hdev_ioctl,
1027     .bdrv_aio_ioctl     = hdev_aio_ioctl,
1028 #endif
1029 };
1030
1031 #ifdef __linux__
1032 static int floppy_open(BlockDriverState *bs, const char *filename, int flags)
1033 {
1034     BDRVRawState *s = bs->opaque;
1035     int ret;
1036
1037     s->type = FTYPE_FD;
1038
1039     /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
1040     ret = raw_open_common(bs, filename, flags, O_NONBLOCK);
1041     if (ret)
1042         return ret;
1043
1044     /* close fd so that we can reopen it as needed */
1045     close(s->fd);
1046     s->fd = -1;
1047     s->fd_media_changed = 1;
1048
1049     return 0;
1050 }
1051
1052 static int floppy_probe_device(const char *filename)
1053 {
1054     int fd, ret;
1055     int prio = 0;
1056     struct floppy_struct fdparam;
1057
1058     if (strstart(filename, "/dev/fd", NULL))
1059         prio = 50;
1060
1061     fd = open(filename, O_RDONLY | O_NONBLOCK);
1062     if (fd < 0) {
1063         goto out;
1064     }
1065
1066     /* Attempt to detect via a floppy specific ioctl */
1067     ret = ioctl(fd, FDGETPRM, &fdparam);
1068     if (ret >= 0)
1069         prio = 100;
1070
1071     close(fd);
1072 out:
1073     return prio;
1074 }
1075
1076
1077 static int floppy_is_inserted(BlockDriverState *bs)
1078 {
1079     return fd_open(bs) >= 0;
1080 }
1081
1082 static int floppy_media_changed(BlockDriverState *bs)
1083 {
1084     BDRVRawState *s = bs->opaque;
1085     int ret;
1086
1087     /*
1088      * XXX: we do not have a true media changed indication.
1089      * It does not work if the floppy is changed without trying to read it.
1090      */
1091     fd_open(bs);
1092     ret = s->fd_media_changed;
1093     s->fd_media_changed = 0;
1094 #ifdef DEBUG_FLOPPY
1095     printf("Floppy changed=%d\n", ret);
1096 #endif
1097     return ret;
1098 }
1099
1100 static int floppy_eject(BlockDriverState *bs, int eject_flag)
1101 {
1102     BDRVRawState *s = bs->opaque;
1103     int fd;
1104
1105     if (s->fd >= 0) {
1106         close(s->fd);
1107         s->fd = -1;
1108     }
1109     fd = open(bs->filename, s->open_flags | O_NONBLOCK);
1110     if (fd >= 0) {
1111         if (ioctl(fd, FDEJECT, 0) < 0)
1112             perror("FDEJECT");
1113         close(fd);
1114     }
1115
1116     return 0;
1117 }
1118
1119 static BlockDriver bdrv_host_floppy = {
1120     .format_name        = "host_floppy",
1121     .instance_size      = sizeof(BDRVRawState),
1122     .bdrv_probe_device  = floppy_probe_device,
1123     .bdrv_open          = floppy_open,
1124     .bdrv_close         = raw_close,
1125     .bdrv_create        = hdev_create,
1126     .create_options     = raw_create_options,
1127     .no_zero_init       = 1,
1128     .bdrv_flush         = raw_flush,
1129
1130     .bdrv_aio_readv     = raw_aio_readv,
1131     .bdrv_aio_writev    = raw_aio_writev,
1132     .bdrv_aio_flush     = raw_aio_flush,
1133
1134     .bdrv_read          = raw_read,
1135     .bdrv_write         = raw_write,
1136     .bdrv_getlength     = raw_getlength,
1137
1138     /* removable device support */
1139     .bdrv_is_inserted   = floppy_is_inserted,
1140     .bdrv_media_changed = floppy_media_changed,
1141     .bdrv_eject         = floppy_eject,
1142 };
1143
1144 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1145 {
1146     BDRVRawState *s = bs->opaque;
1147
1148     s->type = FTYPE_CD;
1149
1150     /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
1151     return raw_open_common(bs, filename, flags, O_NONBLOCK);
1152 }
1153
1154 static int cdrom_probe_device(const char *filename)
1155 {
1156     int fd, ret;
1157     int prio = 0;
1158
1159     if (strstart(filename, "/dev/cd", NULL))
1160         prio = 50;
1161
1162     fd = open(filename, O_RDONLY | O_NONBLOCK);
1163     if (fd < 0) {
1164         goto out;
1165     }
1166
1167     /* Attempt to detect via a CDROM specific ioctl */
1168     ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1169     if (ret >= 0)
1170         prio = 100;
1171
1172     close(fd);
1173 out:
1174     return prio;
1175 }
1176
1177 static int cdrom_is_inserted(BlockDriverState *bs)
1178 {
1179     BDRVRawState *s = bs->opaque;
1180     int ret;
1181
1182     ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1183     if (ret == CDS_DISC_OK)
1184         return 1;
1185     return 0;
1186 }
1187
1188 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1189 {
1190     BDRVRawState *s = bs->opaque;
1191
1192     if (eject_flag) {
1193         if (ioctl(s->fd, CDROMEJECT, NULL) < 0)
1194             perror("CDROMEJECT");
1195     } else {
1196         if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0)
1197             perror("CDROMEJECT");
1198     }
1199
1200     return 0;
1201 }
1202
1203 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1204 {
1205     BDRVRawState *s = bs->opaque;
1206
1207     if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) {
1208         /*
1209          * Note: an error can happen if the distribution automatically
1210          * mounts the CD-ROM
1211          */
1212         /* perror("CDROM_LOCKDOOR"); */
1213     }
1214
1215     return 0;
1216 }
1217
1218 static BlockDriver bdrv_host_cdrom = {
1219     .format_name        = "host_cdrom",
1220     .instance_size      = sizeof(BDRVRawState),
1221     .bdrv_probe_device  = cdrom_probe_device,
1222     .bdrv_open          = cdrom_open,
1223     .bdrv_close         = raw_close,
1224     .bdrv_create        = hdev_create,
1225     .create_options     = raw_create_options,
1226     .no_zero_init       = 1,
1227     .bdrv_flush         = raw_flush,
1228
1229     .bdrv_aio_readv     = raw_aio_readv,
1230     .bdrv_aio_writev    = raw_aio_writev,
1231     .bdrv_aio_flush     = raw_aio_flush,
1232
1233     .bdrv_read          = raw_read,
1234     .bdrv_write         = raw_write,
1235     .bdrv_getlength     = raw_getlength,
1236
1237     /* removable device support */
1238     .bdrv_is_inserted   = cdrom_is_inserted,
1239     .bdrv_eject         = cdrom_eject,
1240     .bdrv_set_locked    = cdrom_set_locked,
1241
1242     /* generic scsi device */
1243     .bdrv_ioctl         = hdev_ioctl,
1244     .bdrv_aio_ioctl     = hdev_aio_ioctl,
1245 };
1246 #endif /* __linux__ */
1247
1248 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
1249 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1250 {
1251     BDRVRawState *s = bs->opaque;
1252     int ret;
1253
1254     s->type = FTYPE_CD;
1255
1256     ret = raw_open_common(bs, filename, flags, 0);
1257     if (ret)
1258         return ret;
1259
1260     /* make sure the door isnt locked at this time */
1261     ioctl(s->fd, CDIOCALLOW);
1262     return 0;
1263 }
1264
1265 static int cdrom_probe_device(const char *filename)
1266 {
1267     if (strstart(filename, "/dev/cd", NULL) ||
1268             strstart(filename, "/dev/acd", NULL))
1269         return 100;
1270     return 0;
1271 }
1272
1273 static int cdrom_reopen(BlockDriverState *bs)
1274 {
1275     BDRVRawState *s = bs->opaque;
1276     int fd;
1277
1278     /*
1279      * Force reread of possibly changed/newly loaded disc,
1280      * FreeBSD seems to not notice sometimes...
1281      */
1282     if (s->fd >= 0)
1283         close(s->fd);
1284     fd = open(bs->filename, s->open_flags, 0644);
1285     if (fd < 0) {
1286         s->fd = -1;
1287         return -EIO;
1288     }
1289     s->fd = fd;
1290
1291     /* make sure the door isnt locked at this time */
1292     ioctl(s->fd, CDIOCALLOW);
1293     return 0;
1294 }
1295
1296 static int cdrom_is_inserted(BlockDriverState *bs)
1297 {
1298     return raw_getlength(bs) > 0;
1299 }
1300
1301 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1302 {
1303     BDRVRawState *s = bs->opaque;
1304
1305     if (s->fd < 0)
1306         return -ENOTSUP;
1307
1308     (void) ioctl(s->fd, CDIOCALLOW);
1309
1310     if (eject_flag) {
1311         if (ioctl(s->fd, CDIOCEJECT) < 0)
1312             perror("CDIOCEJECT");
1313     } else {
1314         if (ioctl(s->fd, CDIOCCLOSE) < 0)
1315             perror("CDIOCCLOSE");
1316     }
1317
1318     if (cdrom_reopen(bs) < 0)
1319         return -ENOTSUP;
1320     return 0;
1321 }
1322
1323 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1324 {
1325     BDRVRawState *s = bs->opaque;
1326
1327     if (s->fd < 0)
1328         return -ENOTSUP;
1329     if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1330         /*
1331          * Note: an error can happen if the distribution automatically
1332          * mounts the CD-ROM
1333          */
1334         /* perror("CDROM_LOCKDOOR"); */
1335     }
1336
1337     return 0;
1338 }
1339
1340 static BlockDriver bdrv_host_cdrom = {
1341     .format_name        = "host_cdrom",
1342     .instance_size      = sizeof(BDRVRawState),
1343     .bdrv_probe_device  = cdrom_probe_device,
1344     .bdrv_open          = cdrom_open,
1345     .bdrv_close         = raw_close,
1346     .bdrv_create        = hdev_create,
1347     .create_options     = raw_create_options,
1348     .no_zero_init       = 1,
1349     .bdrv_flush         = raw_flush,
1350
1351     .bdrv_aio_readv     = raw_aio_readv,
1352     .bdrv_aio_writev    = raw_aio_writev,
1353     .bdrv_aio_flush     = raw_aio_flush,
1354
1355     .bdrv_read          = raw_read,
1356     .bdrv_write         = raw_write,
1357     .bdrv_getlength     = raw_getlength,
1358
1359     /* removable device support */
1360     .bdrv_is_inserted   = cdrom_is_inserted,
1361     .bdrv_eject         = cdrom_eject,
1362     .bdrv_set_locked    = cdrom_set_locked,
1363 };
1364 #endif /* __FreeBSD__ */
1365
1366 static void bdrv_raw_init(void)
1367 {
1368     /*
1369      * Register all the drivers.  Note that order is important, the driver
1370      * registered last will get probed first.
1371      */
1372     bdrv_register(&bdrv_raw);
1373     bdrv_register(&bdrv_host_device);
1374 #ifdef __linux__
1375     bdrv_register(&bdrv_host_floppy);
1376     bdrv_register(&bdrv_host_cdrom);
1377 #endif
1378 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
1379     bdrv_register(&bdrv_host_cdrom);
1380 #endif
1381 }
1382
1383 block_init(bdrv_raw_init);