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     }
 146
 147     /* Use O_DSYNC for write-through caching, no flags for write-back caching,
 148      * and O_DIRECT for no caching. */
 149     if ((bdrv_flags & BDRV_O_NOCACHE))
 150         s->open_flags |= O_DIRECT;
 151     else if (!(bdrv_flags & BDRV_O_CACHE_WB))
 152         s->open_flags |= O_DSYNC;
 153
 154     s->fd = -1;
 155     fd = qemu_open(filename, s->open_flags, 0644);
 156     if (fd < 0) {
 157         ret = -errno;
 158         if (ret == -EROFS)
 159             ret = -EACCES;
 160         return ret;
 161     }
 162     s->fd = fd;
 163     s->aligned_buf = NULL;
 164
 165     if ((bdrv_flags & BDRV_O_NOCACHE)) {
 166         s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
 167         if (s->aligned_buf == NULL) {
 168             goto out_close;
 169         }
 170     }
 171
 172 #ifdef CONFIG_LINUX_AIO
 173     if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
 174                       (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
 175
 176         /* We're falling back to POSIX AIO in some cases */
 177         paio_init();
 178
 179         s->aio_ctx = laio_init();
 180         if (!s->aio_ctx) {
 181             goto out_free_buf;
 182         }
 183         s->use_aio = 1;
 184     } else
 185 #endif
 186     {
 187         if (paio_init() < 0) {
 188             goto out_free_buf;
 189         }
 190 #ifdef CONFIG_LINUX_AIO
 191         s->use_aio = 0;
 192 #endif
 193     }
 194
 195     return 0;
 196
 197 out_free_buf:
 198     qemu_vfree(s->aligned_buf);
 199 out_close:
 200     close(fd);
 201     return -errno;
 202 }
 203
 204 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 205 {
 206     BDRVRawState *s = bs->opaque;
 207
 208     s->type = FTYPE_FILE;
 209     return raw_open_common(bs, filename, flags, 0);
 210 }
 211
 212 /* XXX: use host sector size if necessary with:
 213 #ifdef DIOCGSECTORSIZE
 214         {
 215             unsigned int sectorsize = 512;
 216             if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
 217                 sectorsize > bufsize)
 218                 bufsize = sectorsize;
 219         }
 220 #endif
 221 #ifdef CONFIG_COCOA
 222         u_int32_t   blockSize = 512;
 223         if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
 224             bufsize = blockSize;
 225         }
 226 #endif
 227 */
 228
 229 /*
 230  * offset and count are in bytes, but must be multiples of 512 for files
 231  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 232  *
 233  * This function may be called without alignment if the caller ensures
 234  * that O_DIRECT is not in effect.
 235  */
 236 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
 237                      uint8_t *buf, int count)
 238 {
 239     BDRVRawState *s = bs->opaque;
 240     int ret;
 241
 242     ret = fd_open(bs);
 243     if (ret < 0)
 244         return ret;
 245
 246     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
 247         ++(s->lseek_err_cnt);
 248         if(s->lseek_err_cnt <= 10) {
 249             DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 250                               "] lseek failed : %d = %s\n",
 251                               s->fd, bs->filename, offset, buf, count,
 252                               bs->total_sectors, errno, strerror(errno));
 253         }
 254         return -1;
 255     }
 256     s->lseek_err_cnt=0;
 257
 258     ret = read(s->fd, buf, count);
 259     if (ret == count)
 260         goto label__raw_read__success;
 261
 262     /* Allow reads beyond the end (needed for pwrite) */
 263     if ((ret == 0) && bs->growable) {
 264         int64_t size = raw_getlength(bs);
 265         if (offset >= size) {
 266             memset(buf, 0, count);
 267             ret = count;
 268             goto label__raw_read__success;
 269         }
 270     }
 271
 272     DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 273                       "] read failed %d : %d = %s\n",
 274                       s->fd, bs->filename, offset, buf, count,
 275                       bs->total_sectors, ret, errno, strerror(errno));
 276
 277     /* Try harder for CDrom. */
 278     if (bs->type == BDRV_TYPE_CDROM) {
 279         lseek(s->fd, offset, SEEK_SET);
 280         ret = read(s->fd, buf, count);
 281         if (ret == count)
 282             goto label__raw_read__success;
 283         lseek(s->fd, offset, SEEK_SET);
 284         ret = read(s->fd, buf, count);
 285         if (ret == count)
 286             goto label__raw_read__success;
 287
 288         DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 289                           "] retry read failed %d : %d = %s\n",
 290                           s->fd, bs->filename, offset, buf, count,
 291                           bs->total_sectors, ret, errno, strerror(errno));
 292     }
 293
 294 label__raw_read__success:
 295
 296     return  (ret < 0) ? -errno : ret;
 297 }
 298
 299 /*
 300  * offset and count are in bytes, but must be multiples of 512 for files
 301  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 302  *
 303  * This function may be called without alignment if the caller ensures
 304  * that O_DIRECT is not in effect.
 305  */
 306 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
 307                       const uint8_t *buf, int count)
 308 {
 309     BDRVRawState *s = bs->opaque;
 310     int ret;
 311
 312     ret = fd_open(bs);
 313     if (ret < 0)
 314         return -errno;
 315
 316     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
 317         ++(s->lseek_err_cnt);
 318         if(s->lseek_err_cnt) {
 319             DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
 320                               PRId64 "] lseek failed : %d = %s\n",
 321                               s->fd, bs->filename, offset, buf, count,
 322                               bs->total_sectors, errno, strerror(errno));
 323         }
 324         return -EIO;
 325     }
 326     s->lseek_err_cnt = 0;
 327
 328     ret = write(s->fd, buf, count);
 329     if (ret == count)
 330         goto label__raw_write__success;
 331
 332     DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 333                       "] write failed %d : %d = %s\n",
 334                       s->fd, bs->filename, offset, buf, count,
 335                       bs->total_sectors, ret, errno, strerror(errno));
 336
 337 label__raw_write__success:
 338
 339     return  (ret < 0) ? -errno : ret;
 340 }
 341
 342
 343 /*
 344  * offset and count are in bytes and possibly not aligned. For files opened
 345  * with O_DIRECT, necessary alignments are ensured before calling
 346  * raw_pread_aligned to do the actual read.
 347  */
 348 static int raw_pread(BlockDriverState *bs, int64_t offset,
 349                      uint8_t *buf, int count)
 350 {
 351     BDRVRawState *s = bs->opaque;
 352     int size, ret, shift, sum;
 353
 354     sum = 0;
 355
 356     if (s->aligned_buf != NULL)  {
 357
 358         if (offset & 0x1ff) {
 359             /* align offset on a 512 bytes boundary */
 360
 361             shift = offset & 0x1ff;
 362             size = (shift + count + 0x1ff) & ~0x1ff;
 363             if (size > ALIGNED_BUFFER_SIZE)
 364                 size = ALIGNED_BUFFER_SIZE;
 365             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
 366             if (ret < 0)
 367                 return ret;
 368
 369             size = 512 - shift;
 370             if (size > count)
 371                 size = count;
 372             memcpy(buf, s->aligned_buf + shift, size);
 373
 374             buf += size;
 375             offset += size;
 376             count -= size;
 377             sum += size;
 378
 379             if (count == 0)
 380                 return sum;
 381         }
 382         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 383
 384             /* read on aligned buffer */
 385
 386             while (count) {
 387
 388                 size = (count + 0x1ff) & ~0x1ff;
 389                 if (size > ALIGNED_BUFFER_SIZE)
 390                     size = ALIGNED_BUFFER_SIZE;
 391
 392                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
 393                 if (ret < 0) {
 394                     return ret;
 395                 } else if (ret == 0) {
 396                     fprintf(stderr, "raw_pread: read beyond end of file\n");
 397                     abort();
 398                 }
 399
 400                 size = ret;
 401                 if (size > count)
 402                     size = count;
 403
 404                 memcpy(buf, s->aligned_buf, size);
 405
 406                 buf += size;
 407                 offset += size;
 408                 count -= size;
 409                 sum += size;
 410             }
 411
 412             return sum;
 413         }
 414     }
 415
 416     return raw_pread_aligned(bs, offset, buf, count) + sum;
 417 }
 418
 419 static int raw_read(BlockDriverState *bs, int64_t sector_num,
 420                     uint8_t *buf, int nb_sectors)
 421 {
 422     int ret;
 423
 424     ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
 425     if (ret == (nb_sectors * 512))
 426         ret = 0;
 427     return ret;
 428 }
 429
 430 /*
 431  * offset and count are in bytes and possibly not aligned. For files opened
 432  * with O_DIRECT, necessary alignments are ensured before calling
 433  * raw_pwrite_aligned to do the actual write.
 434  */
 435 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 436                       const uint8_t *buf, int count)
 437 {
 438     BDRVRawState *s = bs->opaque;
 439     int size, ret, shift, sum;
 440
 441     sum = 0;
 442
 443     if (s->aligned_buf != NULL) {
 444
 445         if (offset & 0x1ff) {
 446             /* align offset on a 512 bytes boundary */
 447             shift = offset & 0x1ff;
 448             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
 449             if (ret < 0)
 450                 return ret;
 451
 452             size = 512 - shift;
 453             if (size > count)
 454                 size = count;
 455             memcpy(s->aligned_buf + shift, buf, size);
 456
 457             ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
 458             if (ret < 0)
 459                 return ret;
 460
 461             buf += size;
 462             offset += size;
 463             count -= size;
 464             sum += size;
 465
 466             if (count == 0)
 467                 return sum;
 468         }
 469         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 470
 471             while ((size = (count & ~0x1ff)) != 0) {
 472
 473                 if (size > ALIGNED_BUFFER_SIZE)
 474                     size = ALIGNED_BUFFER_SIZE;
 475
 476                 memcpy(s->aligned_buf, buf, size);
 477
 478                 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
 479                 if (ret < 0)
 480                     return ret;
 481
 482                 buf += ret;
 483                 offset += ret;
 484                 count -= ret;
 485                 sum += ret;
 486             }
 487             /* here, count < 512 because (count & ~0x1ff) == 0 */
 488             if (count) {
 489                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
 490                 if (ret < 0)
 491                     return ret;
 492                  memcpy(s->aligned_buf, buf, count);
 493
 494                  ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
 495                  if (ret < 0)
 496                      return ret;
 497                  if (count < ret)
 498                      ret = count;
 499
 500                  sum += ret;
 501             }
 502             return sum;
 503         }
 504     }
 505     return raw_pwrite_aligned(bs, offset, buf, count) + sum;
 506 }
 507
 508 static int raw_write(BlockDriverState *bs, int64_t sector_num,
 509                      const uint8_t *buf, int nb_sectors)
 510 {
 511     int ret;
 512     ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
 513     if (ret == (nb_sectors * 512))
 514         ret = 0;
 515     return ret;
 516 }
 517
 518 /*
 519  * Check if all memory in this vector is sector aligned.
 520  */
 521 static int qiov_is_aligned(QEMUIOVector *qiov)
 522 {
 523     int i;
 524
 525     for (i = 0; i < qiov->niov; i++) {
 526         if ((uintptr_t) qiov->iov[i].iov_base % 512) {
 527             return 0;
 528         }
 529     }
 530
 531     return 1;
 532 }
 533
 534 static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
 535         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 536         BlockDriverCompletionFunc *cb, void *opaque, int type)
 537 {
 538     BDRVRawState *s = bs->opaque;
 539
 540     if (fd_open(bs) < 0)
 541         return NULL;
 542
 543     /*
 544      * If O_DIRECT is used the buffer needs to be aligned on a sector
 545      * boundary.  Check if this is the case or telll the low-level
 546      * driver that it needs to copy the buffer.
 547      */
 548     if (s->aligned_buf) {
 549         if (!qiov_is_aligned(qiov)) {
 550             type |= QEMU_AIO_MISALIGNED;
 551 #ifdef CONFIG_LINUX_AIO
 552         } else if (s->use_aio) {
 553             return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
 554                                nb_sectors, cb, opaque, type);
 555 #endif
 556         }
 557     }
 558
 559     return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
 560                        cb, opaque, type);
 561 }
 562
 563 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
 564         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 565         BlockDriverCompletionFunc *cb, void *opaque)
 566 {
 567     return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
 568                           cb, opaque, QEMU_AIO_READ);
 569 }
 570
 571 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
 572         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 573         BlockDriverCompletionFunc *cb, void *opaque)
 574 {
 575     return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
 576                           cb, opaque, QEMU_AIO_WRITE);
 577 }
 578
 579 static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
 580         BlockDriverCompletionFunc *cb, void *opaque)
 581 {
 582     BDRVRawState *s = bs->opaque;
 583
 584     if (fd_open(bs) < 0)
 585         return NULL;
 586
 587     return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
 588 }
 589
 590 static void raw_close(BlockDriverState *bs)
 591 {
 592     BDRVRawState *s = bs->opaque;
 593     if (s->fd >= 0) {
 594         close(s->fd);
 595         s->fd = -1;
 596         if (s->aligned_buf != NULL)
 597             qemu_vfree(s->aligned_buf);
 598     }
 599 }
 600
 601 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 602 {
 603     BDRVRawState *s = bs->opaque;
 604     if (s->type != FTYPE_FILE)
 605         return -ENOTSUP;
 606     if (ftruncate(s->fd, offset) < 0)
 607         return -errno;
 608     return 0;
 609 }
 610
 611 #ifdef __OpenBSD__
 612 static int64_t raw_getlength(BlockDriverState *bs)
 613 {
 614     BDRVRawState *s = bs->opaque;
 615     int fd = s->fd;
 616     struct stat st;
 617
 618     if (fstat(fd, &st))
 619         return -1;
 620     if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
 621         struct disklabel dl;
 622
 623         if (ioctl(fd, DIOCGDINFO, &dl))
 624             return -1;
 625         return (uint64_t)dl.d_secsize *
 626             dl.d_partitions[DISKPART(st.st_rdev)].p_size;
 627     } else
 628         return st.st_size;
 629 }
 630 #elif defined(__sun__)
 631 static int64_t raw_getlength(BlockDriverState *bs)
 632 {
 633     BDRVRawState *s = bs->opaque;
 634     struct dk_minfo minfo;
 635     int ret;
 636
 637     ret = fd_open(bs);
 638     if (ret < 0) {
 639         return ret;
 640     }
 641
 642     /*
 643      * Use the DKIOCGMEDIAINFO ioctl to read the size.
 644      */
 645     ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo);
 646     if (ret != -1) {
 647         return minfo.dki_lbsize * minfo.dki_capacity;
 648     }
 649
 650     /*
 651      * There are reports that lseek on some devices fails, but
 652      * irc discussion said that contingency on contingency was overkill.
 653      */
 654     return lseek(s->fd, 0, SEEK_END);
 655 }
 656 #elif defined(CONFIG_BSD)
 657 static int64_t raw_getlength(BlockDriverState *bs)
 658 {
 659     BDRVRawState *s = bs->opaque;
 660     int fd = s->fd;
 661     int64_t size;
 662     struct stat sb;
 663 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
 664     int reopened = 0;
 665 #endif
 666     int ret;
 667
 668     ret = fd_open(bs);
 669     if (ret < 0)
 670         return ret;
 671
 672 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
 673 again:
 674 #endif
 675     if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
 676 #ifdef DIOCGMEDIASIZE
 677         if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
 678 #elif defined(DIOCGPART)
 679         {
 680                 struct partinfo pi;
 681                 if (ioctl(fd, DIOCGPART, &pi) == 0)
 682                         size = pi.media_size;
 683                 else
 684                         size = 0;
 685         }
 686         if (size == 0)
 687 #endif
 688 #ifdef CONFIG_COCOA
 689         size = LONG_LONG_MAX;
 690 #else
 691         size = lseek(fd, 0LL, SEEK_END);
 692 #endif
 693 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 694         switch(s->type) {
 695         case FTYPE_CD:
 696             /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
 697             if (size == 2048LL * (unsigned)-1)
 698                 size = 0;
 699             /* XXX no disc?  maybe we need to reopen... */
 700             if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
 701                 reopened = 1;
 702                 goto again;
 703             }
 704         }
 705 #endif
 706     } else {
 707         size = lseek(fd, 0, SEEK_END);
 708     }
 709     return size;
 710 }
 711 #else
 712 static int64_t raw_getlength(BlockDriverState *bs)
 713 {
 714     BDRVRawState *s = bs->opaque;
 715     int ret;
 716
 717     ret = fd_open(bs);
 718     if (ret < 0) {
 719         return ret;
 720     }
 721
 722     return lseek(s->fd, 0, SEEK_END);
 723 }
 724 #endif
 725
 726 static int raw_create(const char *filename, QEMUOptionParameter *options)
 727 {
 728     int fd;
 729     int result = 0;
 730     int64_t total_size = 0;
 731
 732     /* Read out options */
 733     while (options && options->name) {
 734         if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
 735             total_size = options->value.n / 512;
 736         }
 737         options++;
 738     }
 739
 740     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 741               0644);
 742     if (fd < 0) {
 743         result = -errno;
 744     } else {
 745         if (ftruncate(fd, total_size * 512) != 0) {
 746             result = -errno;
 747         }
 748         if (close(fd) != 0) {
 749             result = -errno;
 750         }
 751     }
 752     return result;
 753 }
 754
 755 static void raw_flush(BlockDriverState *bs)
 756 {
 757     BDRVRawState *s = bs->opaque;
 758     qemu_fdatasync(s->fd);
 759 }
 760
 761
 762 static QEMUOptionParameter raw_create_options[] = {
 763     {
 764         .name = BLOCK_OPT_SIZE,
 765         .type = OPT_SIZE,
 766         .help = "Virtual disk size"
 767     },
 768     { NULL }
 769 };
 770
 771 static BlockDriver bdrv_raw = {
 772     .format_name = "raw",
 773     .instance_size = sizeof(BDRVRawState),
 774     .bdrv_probe = NULL, /* no probe for protocols */
 775     .bdrv_open = raw_open,
 776     .bdrv_read = raw_read,
 777     .bdrv_write = raw_write,
 778     .bdrv_close = raw_close,
 779     .bdrv_create = raw_create,
 780     .bdrv_flush = raw_flush,
 781
 782     .bdrv_aio_readv = raw_aio_readv,
 783     .bdrv_aio_writev = raw_aio_writev,
 784     .bdrv_aio_flush = raw_aio_flush,
 785
 786     .bdrv_truncate = raw_truncate,
 787     .bdrv_getlength = raw_getlength,
 788
 789     .create_options = raw_create_options,
 790 };
 791
 792 /***********************************************/
 793 /* host device */
 794
 795 #ifdef CONFIG_COCOA
 796 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
 797 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
 798
 799 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
 800 {
 801     kern_return_t       kernResult;
 802     mach_port_t     masterPort;
 803     CFMutableDictionaryRef  classesToMatch;
 804
 805     kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
 806     if ( KERN_SUCCESS != kernResult ) {
 807         printf( "IOMasterPort returned %d\n", kernResult );
 808     }
 809
 810     classesToMatch = IOServiceMatching( kIOCDMediaClass );
 811     if ( classesToMatch == NULL ) {
 812         printf( "IOServiceMatching returned a NULL dictionary.\n" );
 813     } else {
 814     CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
 815     }
 816     kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
 817     if ( KERN_SUCCESS != kernResult )
 818     {
 819         printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
 820     }
 821
 822     return kernResult;
 823 }
 824
 825 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
 826 {
 827     io_object_t     nextMedia;
 828     kern_return_t   kernResult = KERN_FAILURE;
 829     *bsdPath = '\0';
 830     nextMedia = IOIteratorNext( mediaIterator );
 831     if ( nextMedia )
 832     {
 833         CFTypeRef   bsdPathAsCFString;
 834     bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
 835         if ( bsdPathAsCFString ) {
 836             size_t devPathLength;
 837             strcpy( bsdPath, _PATH_DEV );
 838             strcat( bsdPath, "r" );
 839             devPathLength = strlen( bsdPath );
 840             if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
 841                 kernResult = KERN_SUCCESS;
 842             }
 843             CFRelease( bsdPathAsCFString );
 844         }
 845         IOObjectRelease( nextMedia );
 846     }
 847
 848     return kernResult;
 849 }
 850
 851 #endif
 852
 853 static int hdev_probe_device(const char *filename)
 854 {
 855     struct stat st;
 856
 857     /* allow a dedicated CD-ROM driver to match with a higher priority */
 858     if (strstart(filename, "/dev/cdrom", NULL))
 859         return 50;
 860
 861     if (stat(filename, &st) >= 0 &&
 862             (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
 863         return 100;
 864     }
 865
 866     return 0;
 867 }
 868
 869 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
 870 {
 871     BDRVRawState *s = bs->opaque;
 872
 873 #ifdef CONFIG_COCOA
 874     if (strstart(filename, "/dev/cdrom", NULL)) {
 875         kern_return_t kernResult;
 876         io_iterator_t mediaIterator;
 877         char bsdPath[ MAXPATHLEN ];
 878         int fd;
 879
 880         kernResult = FindEjectableCDMedia( &mediaIterator );
 881         kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
 882
 883         if ( bsdPath[ 0 ] != '\0' ) {
 884             strcat(bsdPath,"s0");
 885             /* some CDs don't have a partition 0 */
 886             fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
 887             if (fd < 0) {
 888                 bsdPath[strlen(bsdPath)-1] = '1';
 889             } else {
 890                 close(fd);
 891             }
 892             filename = bsdPath;
 893         }
 894
 895         if ( mediaIterator )
 896             IOObjectRelease( mediaIterator );
 897     }
 898 #endif
 899
 900     s->type = FTYPE_FILE;
 901 #if defined(__linux__)
 902     if (strstart(filename, "/dev/sg", NULL)) {
 903         bs->sg = 1;
 904     }
 905 #endif
 906
 907     return raw_open_common(bs, filename, flags, 0);
 908 }
 909
 910 #if defined(__linux__)
 911 /* Note: we do not have a reliable method to detect if the floppy is
 912    present. The current method is to try to open the floppy at every
 913    I/O and to keep it opened during a few hundreds of ms. */
 914 static int fd_open(BlockDriverState *bs)
 915 {
 916     BDRVRawState *s = bs->opaque;
 917     int last_media_present;
 918
 919     if (s->type != FTYPE_FD)
 920         return 0;
 921     last_media_present = (s->fd >= 0);
 922     if (s->fd >= 0 &&
 923         (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
 924         close(s->fd);
 925         s->fd = -1;
 926 #ifdef DEBUG_FLOPPY
 927         printf("Floppy closed\n");
 928 #endif
 929     }
 930     if (s->fd < 0) {
 931         if (s->fd_got_error &&
 932             (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
 933 #ifdef DEBUG_FLOPPY
 934             printf("No floppy (open delayed)\n");
 935 #endif
 936             return -EIO;
 937         }
 938         s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK);
 939         if (s->fd < 0) {
 940             s->fd_error_time = qemu_get_clock(rt_clock);
 941             s->fd_got_error = 1;
 942             if (last_media_present)
 943                 s->fd_media_changed = 1;
 944 #ifdef DEBUG_FLOPPY
 945             printf("No floppy\n");
 946 #endif
 947             return -EIO;
 948         }
 949 #ifdef DEBUG_FLOPPY
 950         printf("Floppy opened\n");
 951 #endif
 952     }
 953     if (!last_media_present)
 954         s->fd_media_changed = 1;
 955     s->fd_open_time = qemu_get_clock(rt_clock);
 956     s->fd_got_error = 0;
 957     return 0;
 958 }
 959
 960 static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
 961 {
 962     BDRVRawState *s = bs->opaque;
 963
 964     return ioctl(s->fd, req, buf);
 965 }
 966
 967 static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
 968         unsigned long int req, void *buf,
 969         BlockDriverCompletionFunc *cb, void *opaque)
 970 {
 971     BDRVRawState *s = bs->opaque;
 972
 973     if (fd_open(bs) < 0)
 974         return NULL;
 975     return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
 976 }
 977
 978 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 979 static int fd_open(BlockDriverState *bs)
 980 {
 981     BDRVRawState *s = bs->opaque;
 982
 983     /* this is just to ensure s->fd is sane (its called by io ops) */
 984     if (s->fd >= 0)
 985         return 0;
 986     return -EIO;
 987 }
 988 #else /* !linux && !FreeBSD */
 989
 990 static int fd_open(BlockDriverState *bs)
 991 {
 992     return 0;
 993 }
 994
 995 #endif /* !linux && !FreeBSD */
 996
 997 static int hdev_create(const char *filename, QEMUOptionParameter *options)
 998 {
 999     int fd;
1000     int ret = 0;
1001     struct stat stat_buf;
1002     int64_t total_size = 0;
1003
1004     /* Read out options */
1005     while (options && options->name) {
1006         if (!strcmp(options->name, "size")) {
1007             total_size = options->value.n / 512;
1008         }
1009         options++;
1010     }
1011
1012     fd = open(filename, O_WRONLY | O_BINARY);
1013     if (fd < 0)
1014         return -errno;
1015
1016     if (fstat(fd, &stat_buf) < 0)
1017         ret = -errno;
1018     else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
1019         ret = -ENODEV;
1020     else if (lseek(fd, 0, SEEK_END) < total_size * 512)
1021         ret = -ENOSPC;
1022
1023     close(fd);
1024     return ret;
1025 }
1026
1027 static BlockDriver bdrv_host_device = {
1028     .format_name        = "host_device",
1029     .instance_size      = sizeof(BDRVRawState),
1030     .bdrv_probe_device  = hdev_probe_device,
1031     .bdrv_open          = hdev_open,
1032     .bdrv_close         = raw_close,
1033     .bdrv_create        = hdev_create,
1034     .create_options     = raw_create_options,
1035     .no_zero_init       = 1,
1036     .bdrv_flush         = raw_flush,
1037
1038     .bdrv_aio_readv     = raw_aio_readv,
1039     .bdrv_aio_writev    = raw_aio_writev,
1040     .bdrv_aio_flush     = raw_aio_flush,
1041
1042     .bdrv_read          = raw_read,
1043     .bdrv_write         = raw_write,
1044     .bdrv_getlength     = raw_getlength,
1045
1046     /* generic scsi device */
1047 #ifdef __linux__
1048     .bdrv_ioctl         = hdev_ioctl,
1049     .bdrv_aio_ioctl     = hdev_aio_ioctl,
1050 #endif
1051 };
1052
1053 #ifdef __linux__
1054 static int floppy_open(BlockDriverState *bs, const char *filename, int flags)
1055 {
1056     BDRVRawState *s = bs->opaque;
1057     int ret;
1058
1059     s->type = FTYPE_FD;
1060
1061     /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
1062     ret = raw_open_common(bs, filename, flags, O_NONBLOCK);
1063     if (ret)
1064         return ret;
1065
1066     /* close fd so that we can reopen it as needed */
1067     close(s->fd);
1068     s->fd = -1;
1069     s->fd_media_changed = 1;
1070
1071     return 0;
1072 }
1073
1074 static int floppy_probe_device(const char *filename)
1075 {
1076     int fd, ret;
1077     int prio = 0;
1078     struct floppy_struct fdparam;
1079
1080     if (strstart(filename, "/dev/fd", NULL))
1081         prio = 50;
1082
1083     fd = open(filename, O_RDONLY | O_NONBLOCK);
1084     if (fd < 0) {
1085         goto out;
1086     }
1087
1088     /* Attempt to detect via a floppy specific ioctl */
1089     ret = ioctl(fd, FDGETPRM, &fdparam);
1090     if (ret >= 0)
1091         prio = 100;
1092
1093     close(fd);
1094 out:
1095     return prio;
1096 }
1097
1098
1099 static int floppy_is_inserted(BlockDriverState *bs)
1100 {
1101     return fd_open(bs) >= 0;
1102 }
1103
1104 static int floppy_media_changed(BlockDriverState *bs)
1105 {
1106     BDRVRawState *s = bs->opaque;
1107     int ret;
1108
1109     /*
1110      * XXX: we do not have a true media changed indication.
1111      * It does not work if the floppy is changed without trying to read it.
1112      */
1113     fd_open(bs);
1114     ret = s->fd_media_changed;
1115     s->fd_media_changed = 0;
1116 #ifdef DEBUG_FLOPPY
1117     printf("Floppy changed=%d\n", ret);
1118 #endif
1119     return ret;
1120 }
1121
1122 static int floppy_eject(BlockDriverState *bs, int eject_flag)
1123 {
1124     BDRVRawState *s = bs->opaque;
1125     int fd;
1126
1127     if (s->fd >= 0) {
1128         close(s->fd);
1129         s->fd = -1;
1130     }
1131     fd = open(bs->filename, s->open_flags | O_NONBLOCK);
1132     if (fd >= 0) {
1133         if (ioctl(fd, FDEJECT, 0) < 0)
1134             perror("FDEJECT");
1135         close(fd);
1136     }
1137
1138     return 0;
1139 }
1140
1141 static BlockDriver bdrv_host_floppy = {
1142     .format_name        = "host_floppy",
1143     .instance_size      = sizeof(BDRVRawState),
1144     .bdrv_probe_device  = floppy_probe_device,
1145     .bdrv_open          = floppy_open,
1146     .bdrv_close         = raw_close,
1147     .bdrv_create        = hdev_create,
1148     .create_options     = raw_create_options,
1149     .no_zero_init       = 1,
1150     .bdrv_flush         = raw_flush,
1151
1152     .bdrv_aio_readv     = raw_aio_readv,
1153     .bdrv_aio_writev    = raw_aio_writev,
1154     .bdrv_aio_flush     = raw_aio_flush,
1155
1156     .bdrv_read          = raw_read,
1157     .bdrv_write         = raw_write,
1158     .bdrv_getlength     = raw_getlength,
1159
1160     /* removable device support */
1161     .bdrv_is_inserted   = floppy_is_inserted,
1162     .bdrv_media_changed = floppy_media_changed,
1163     .bdrv_eject         = floppy_eject,
1164 };
1165
1166 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1167 {
1168     BDRVRawState *s = bs->opaque;
1169
1170     s->type = FTYPE_CD;
1171
1172     /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
1173     return raw_open_common(bs, filename, flags, O_NONBLOCK);
1174 }
1175
1176 static int cdrom_probe_device(const char *filename)
1177 {
1178     int fd, ret;
1179     int prio = 0;
1180
1181     if (strstart(filename, "/dev/cd", NULL))
1182         prio = 50;
1183
1184     fd = open(filename, O_RDONLY | O_NONBLOCK);
1185     if (fd < 0) {
1186         goto out;
1187     }
1188
1189     /* Attempt to detect via a CDROM specific ioctl */
1190     ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1191     if (ret >= 0)
1192         prio = 100;
1193
1194     close(fd);
1195 out:
1196     return prio;
1197 }
1198
1199 static int cdrom_is_inserted(BlockDriverState *bs)
1200 {
1201     BDRVRawState *s = bs->opaque;
1202     int ret;
1203
1204     ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1205     if (ret == CDS_DISC_OK)
1206         return 1;
1207     return 0;
1208 }
1209
1210 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1211 {
1212     BDRVRawState *s = bs->opaque;
1213
1214     if (eject_flag) {
1215         if (ioctl(s->fd, CDROMEJECT, NULL) < 0)
1216             perror("CDROMEJECT");
1217     } else {
1218         if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0)
1219             perror("CDROMEJECT");
1220     }
1221
1222     return 0;
1223 }
1224
1225 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1226 {
1227     BDRVRawState *s = bs->opaque;
1228
1229     if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) {
1230         /*
1231          * Note: an error can happen if the distribution automatically
1232          * mounts the CD-ROM
1233          */
1234         /* perror("CDROM_LOCKDOOR"); */
1235     }
1236
1237     return 0;
1238 }
1239
1240 static BlockDriver bdrv_host_cdrom = {
1241     .format_name        = "host_cdrom",
1242     .instance_size      = sizeof(BDRVRawState),
1243     .bdrv_probe_device  = cdrom_probe_device,
1244     .bdrv_open          = cdrom_open,
1245     .bdrv_close         = raw_close,
1246     .bdrv_create        = hdev_create,
1247     .create_options     = raw_create_options,
1248     .no_zero_init       = 1,
1249     .bdrv_flush         = raw_flush,
1250
1251     .bdrv_aio_readv     = raw_aio_readv,
1252     .bdrv_aio_writev    = raw_aio_writev,
1253     .bdrv_aio_flush     = raw_aio_flush,
1254
1255     .bdrv_read          = raw_read,
1256     .bdrv_write         = raw_write,
1257     .bdrv_getlength     = raw_getlength,
1258
1259     /* removable device support */
1260     .bdrv_is_inserted   = cdrom_is_inserted,
1261     .bdrv_eject         = cdrom_eject,
1262     .bdrv_set_locked    = cdrom_set_locked,
1263
1264     /* generic scsi device */
1265     .bdrv_ioctl         = hdev_ioctl,
1266     .bdrv_aio_ioctl     = hdev_aio_ioctl,
1267 };
1268 #endif /* __linux__ */
1269
1270 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
1271 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1272 {
1273     BDRVRawState *s = bs->opaque;
1274     int ret;
1275
1276     s->type = FTYPE_CD;
1277
1278     ret = raw_open_common(bs, filename, flags, 0);
1279     if (ret)
1280         return ret;
1281
1282     /* make sure the door isnt locked at this time */
1283     ioctl(s->fd, CDIOCALLOW);
1284     return 0;
1285 }
1286
1287 static int cdrom_probe_device(const char *filename)
1288 {
1289     if (strstart(filename, "/dev/cd", NULL) ||
1290             strstart(filename, "/dev/acd", NULL))
1291         return 100;
1292     return 0;
1293 }
1294
1295 static int cdrom_reopen(BlockDriverState *bs)
1296 {
1297     BDRVRawState *s = bs->opaque;
1298     int fd;
1299
1300     /*
1301      * Force reread of possibly changed/newly loaded disc,
1302      * FreeBSD seems to not notice sometimes...
1303      */
1304     if (s->fd >= 0)
1305         close(s->fd);
1306     fd = open(bs->filename, s->open_flags, 0644);
1307     if (fd < 0) {
1308         s->fd = -1;
1309         return -EIO;
1310     }
1311     s->fd = fd;
1312
1313     /* make sure the door isnt locked at this time */
1314     ioctl(s->fd, CDIOCALLOW);
1315     return 0;
1316 }
1317
1318 static int cdrom_is_inserted(BlockDriverState *bs)
1319 {
1320     return raw_getlength(bs) > 0;
1321 }
1322
1323 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1324 {
1325     BDRVRawState *s = bs->opaque;
1326
1327     if (s->fd < 0)
1328         return -ENOTSUP;
1329
1330     (void) ioctl(s->fd, CDIOCALLOW);
1331
1332     if (eject_flag) {
1333         if (ioctl(s->fd, CDIOCEJECT) < 0)
1334             perror("CDIOCEJECT");
1335     } else {
1336         if (ioctl(s->fd, CDIOCCLOSE) < 0)
1337             perror("CDIOCCLOSE");
1338     }
1339
1340     if (cdrom_reopen(bs) < 0)
1341         return -ENOTSUP;
1342     return 0;
1343 }
1344
1345 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1346 {
1347     BDRVRawState *s = bs->opaque;
1348
1349     if (s->fd < 0)
1350         return -ENOTSUP;
1351     if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1352         /*
1353          * Note: an error can happen if the distribution automatically
1354          * mounts the CD-ROM
1355          */
1356         /* perror("CDROM_LOCKDOOR"); */
1357     }
1358
1359     return 0;
1360 }
1361
1362 static BlockDriver bdrv_host_cdrom = {
1363     .format_name        = "host_cdrom",
1364     .instance_size      = sizeof(BDRVRawState),
1365     .bdrv_probe_device  = cdrom_probe_device,
1366     .bdrv_open          = cdrom_open,
1367     .bdrv_close         = raw_close,
1368     .bdrv_create        = hdev_create,
1369     .create_options     = raw_create_options,
1370     .no_zero_init       = 1,
1371     .bdrv_flush         = raw_flush,
1372
1373     .bdrv_aio_readv     = raw_aio_readv,
1374     .bdrv_aio_writev    = raw_aio_writev,
1375     .bdrv_aio_flush     = raw_aio_flush,
1376
1377     .bdrv_read          = raw_read,
1378     .bdrv_write         = raw_write,
1379     .bdrv_getlength     = raw_getlength,
1380
1381     /* removable device support */
1382     .bdrv_is_inserted   = cdrom_is_inserted,
1383     .bdrv_eject         = cdrom_eject,
1384     .bdrv_set_locked    = cdrom_set_locked,
1385 };
1386 #endif /* __FreeBSD__ */
1387
1388 static void bdrv_raw_init(void)
1389 {
1390     /*
1391      * Register all the drivers.  Note that order is important, the driver
1392      * registered last will get probed first.
1393      */
1394     bdrv_register(&bdrv_raw);
1395     bdrv_register(&bdrv_host_device);
1396 #ifdef __linux__
1397     bdrv_register(&bdrv_host_floppy);
1398     bdrv_register(&bdrv_host_cdrom);
1399 #endif
1400 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
1401     bdrv_register(&bdrv_host_cdrom);
1402 #endif
1403 }
1404
1405 block_init(bdrv_raw_init);