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 "compatfd.h"
  31 #include <assert.h>
  32 #include "block/raw-posix-aio.h"
  33
  34 #ifdef CONFIG_COCOA
  35 #include <paths.h>
  36 #include <sys/param.h>
  37 #include <IOKit/IOKitLib.h>
  38 #include <IOKit/IOBSD.h>
  39 #include <IOKit/storage/IOMediaBSDClient.h>
  40 #include <IOKit/storage/IOMedia.h>
  41 #include <IOKit/storage/IOCDMedia.h>
  42 //#include <IOKit/storage/IOCDTypes.h>
  43 #include <CoreFoundation/CoreFoundation.h>
  44 #endif
  45
  46 #ifdef __sun__
  47 #define _POSIX_PTHREAD_SEMANTICS 1
  48 #include <signal.h>
  49 #include <sys/dkio.h>
  50 #endif
  51 #ifdef __linux__
  52 #include <sys/ioctl.h>
  53 #include <linux/cdrom.h>
  54 #include <linux/fd.h>
  55 #endif
  56 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
  57 #include <signal.h>
  58 #include <sys/disk.h>
  59 #include <sys/cdio.h>
  60 #endif
  61
  62 #ifdef __OpenBSD__
  63 #include <sys/ioctl.h>
  64 #include <sys/disklabel.h>
  65 #include <sys/dkio.h>
  66 #endif
  67
  68 #ifdef __DragonFly__
  69 #include <sys/ioctl.h>
  70 #include <sys/diskslice.h>
  71 #endif
  72
  73 //#define DEBUG_FLOPPY
  74
  75 //#define DEBUG_BLOCK
  76 #if defined(DEBUG_BLOCK)
  77 #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \
  78     { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0)
  79 #else
  80 #define DEBUG_BLOCK_PRINT(formatCstr, ...)
  81 #endif
  82
  83 /* OS X does not have O_DSYNC */
  84 #ifndef O_DSYNC
  85 #ifdef O_SYNC
  86 #define O_DSYNC O_SYNC
  87 #elif defined(O_FSYNC)
  88 #define O_DSYNC O_FSYNC
  89 #endif
  90 #endif
  91
  92 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
  93 #ifndef O_DIRECT
  94 #define O_DIRECT O_DSYNC
  95 #endif
  96
  97 #define FTYPE_FILE   0
  98 #define FTYPE_CD     1
  99 #define FTYPE_FD     2
 100
 101 #define ALIGNED_BUFFER_SIZE (32 * 512)
 102
 103 /* if the FD is not accessed during that time (in ms), we try to
 104    reopen it to see if the disk has been changed */
 105 #define FD_OPEN_TIMEOUT 1000
 106
 107 typedef struct BDRVRawState {
 108     int fd;
 109     int type;
 110     int open_flags;
 111 #if defined(__linux__)
 112     /* linux floppy specific */
 113     int64_t fd_open_time;
 114     int64_t fd_error_time;
 115     int fd_got_error;
 116     int fd_media_changed;
 117 #endif
 118 #ifdef CONFIG_LINUX_AIO
 119     int use_aio;
 120     void *aio_ctx;
 121 #endif
 122     uint8_t* aligned_buf;
 123 } BDRVRawState;
 124
 125 static int fd_open(BlockDriverState *bs);
 126 static int64_t raw_getlength(BlockDriverState *bs);
 127
 128 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 129 static int cdrom_reopen(BlockDriverState *bs);
 130 #endif
 131
 132 static int raw_open_common(BlockDriverState *bs, const char *filename,
 133                            int bdrv_flags, int open_flags)
 134 {
 135     BDRVRawState *s = bs->opaque;
 136     int fd, ret;
 137
 138     s->open_flags = open_flags | O_BINARY;
 139     s->open_flags &= ~O_ACCMODE;
 140     if (bdrv_flags & BDRV_O_RDWR) {
 141         s->open_flags |= O_RDWR;
 142     } else {
 143         s->open_flags |= O_RDONLY;
 144     }
 145
 146     /* Use O_DSYNC for write-through caching, no flags for write-back caching,
 147      * and O_DIRECT for no caching. */
 148     if ((bdrv_flags & BDRV_O_NOCACHE))
 149         s->open_flags |= O_DIRECT;
 150     else if (!(bdrv_flags & BDRV_O_CACHE_WB))
 151         s->open_flags |= O_DSYNC;
 152
 153     s->fd = -1;
 154     fd = qemu_open(filename, s->open_flags, 0644);
 155     if (fd < 0) {
 156         ret = -errno;
 157         if (ret == -EROFS)
 158             ret = -EACCES;
 159         return ret;
 160     }
 161     s->fd = fd;
 162     s->aligned_buf = NULL;
 163
 164     if ((bdrv_flags & BDRV_O_NOCACHE)) {
 165         s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
 166         if (s->aligned_buf == NULL) {
 167             goto out_close;
 168         }
 169     }
 170
 171 #ifdef CONFIG_LINUX_AIO
 172     if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
 173                       (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
 174
 175         /* We're falling back to POSIX AIO in some cases */
 176         paio_init();
 177
 178         s->aio_ctx = laio_init();
 179         if (!s->aio_ctx) {
 180             goto out_free_buf;
 181         }
 182         s->use_aio = 1;
 183     } else
 184 #endif
 185     {
 186         if (paio_init() < 0) {
 187             goto out_free_buf;
 188         }
 189 #ifdef CONFIG_LINUX_AIO
 190         s->use_aio = 0;
 191 #endif
 192     }
 193
 194     return 0;
 195
 196 out_free_buf:
 197     qemu_vfree(s->aligned_buf);
 198 out_close:
 199     close(fd);
 200     return -errno;
 201 }
 202
 203 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 204 {
 205     BDRVRawState *s = bs->opaque;
 206
 207     s->type = FTYPE_FILE;
 208     return raw_open_common(bs, filename, flags, 0);
 209 }
 210
 211 /* XXX: use host sector size if necessary with:
 212 #ifdef DIOCGSECTORSIZE
 213         {
 214             unsigned int sectorsize = 512;
 215             if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
 216                 sectorsize > bufsize)
 217                 bufsize = sectorsize;
 218         }
 219 #endif
 220 #ifdef CONFIG_COCOA
 221         uint32_t blockSize = 512;
 222         if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
 223             bufsize = blockSize;
 224         }
 225 #endif
 226 */
 227
 228 /*
 229  * offset and count are in bytes, but must be multiples of 512 for files
 230  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 231  *
 232  * This function may be called without alignment if the caller ensures
 233  * that O_DIRECT is not in effect.
 234  */
 235 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
 236                      uint8_t *buf, int count)
 237 {
 238     BDRVRawState *s = bs->opaque;
 239     int ret;
 240
 241     ret = fd_open(bs);
 242     if (ret < 0)
 243         return ret;
 244
 245     ret = pread(s->fd, buf, count, offset);
 246     if (ret == count)
 247         return ret;
 248
 249     /* Allow reads beyond the end (needed for pwrite) */
 250     if ((ret == 0) && bs->growable) {
 251         int64_t size = raw_getlength(bs);
 252         if (offset >= size) {
 253             memset(buf, 0, count);
 254             return count;
 255         }
 256     }
 257
 258     DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 259                       "] read failed %d : %d = %s\n",
 260                       s->fd, bs->filename, offset, buf, count,
 261                       bs->total_sectors, ret, errno, strerror(errno));
 262
 263     /* Try harder for CDrom. */
 264     if (s->type != FTYPE_FILE) {
 265         ret = pread(s->fd, buf, count, offset);
 266         if (ret == count)
 267             return ret;
 268         ret = pread(s->fd, buf, count, offset);
 269         if (ret == count)
 270             return ret;
 271
 272         DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 273                           "] retry read failed %d : %d = %s\n",
 274                           s->fd, bs->filename, offset, buf, count,
 275                           bs->total_sectors, ret, errno, strerror(errno));
 276     }
 277
 278     return  (ret < 0) ? -errno : ret;
 279 }
 280
 281 /*
 282  * offset and count are in bytes, but must be multiples of 512 for files
 283  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 284  *
 285  * This function may be called without alignment if the caller ensures
 286  * that O_DIRECT is not in effect.
 287  */
 288 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
 289                       const uint8_t *buf, int count)
 290 {
 291     BDRVRawState *s = bs->opaque;
 292     int ret;
 293
 294     ret = fd_open(bs);
 295     if (ret < 0)
 296         return -errno;
 297
 298     ret = pwrite(s->fd, buf, count, offset);
 299     if (ret == count)
 300         return ret;
 301
 302     DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 303                       "] write failed %d : %d = %s\n",
 304                       s->fd, bs->filename, offset, buf, count,
 305                       bs->total_sectors, ret, errno, strerror(errno));
 306
 307     return  (ret < 0) ? -errno : ret;
 308 }
 309
 310
 311 /*
 312  * offset and count are in bytes and possibly not aligned. For files opened
 313  * with O_DIRECT, necessary alignments are ensured before calling
 314  * raw_pread_aligned to do the actual read.
 315  */
 316 static int raw_pread(BlockDriverState *bs, int64_t offset,
 317                      uint8_t *buf, int count)
 318 {
 319     BDRVRawState *s = bs->opaque;
 320     int size, ret, shift, sum;
 321
 322     sum = 0;
 323
 324     if (s->aligned_buf != NULL)  {
 325
 326         if (offset & 0x1ff) {
 327             /* align offset on a 512 bytes boundary */
 328
 329             shift = offset & 0x1ff;
 330             size = (shift + count + 0x1ff) & ~0x1ff;
 331             if (size > ALIGNED_BUFFER_SIZE)
 332                 size = ALIGNED_BUFFER_SIZE;
 333             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
 334             if (ret < 0)
 335                 return ret;
 336
 337             size = 512 - shift;
 338             if (size > count)
 339                 size = count;
 340             memcpy(buf, s->aligned_buf + shift, size);
 341
 342             buf += size;
 343             offset += size;
 344             count -= size;
 345             sum += size;
 346
 347             if (count == 0)
 348                 return sum;
 349         }
 350         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 351
 352             /* read on aligned buffer */
 353
 354             while (count) {
 355
 356                 size = (count + 0x1ff) & ~0x1ff;
 357                 if (size > ALIGNED_BUFFER_SIZE)
 358                     size = ALIGNED_BUFFER_SIZE;
 359
 360                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
 361                 if (ret < 0) {
 362                     return ret;
 363                 } else if (ret == 0) {
 364                     fprintf(stderr, "raw_pread: read beyond end of file\n");
 365                     abort();
 366                 }
 367
 368                 size = ret;
 369                 if (size > count)
 370                     size = count;
 371
 372                 memcpy(buf, s->aligned_buf, size);
 373
 374                 buf += size;
 375                 offset += size;
 376                 count -= size;
 377                 sum += size;
 378             }
 379
 380             return sum;
 381         }
 382     }
 383
 384     return raw_pread_aligned(bs, offset, buf, count) + sum;
 385 }
 386
 387 static int raw_read(BlockDriverState *bs, int64_t sector_num,
 388                     uint8_t *buf, int nb_sectors)
 389 {
 390     int ret;
 391
 392     ret = raw_pread(bs, sector_num * BDRV_SECTOR_SIZE, buf,
 393                     nb_sectors * BDRV_SECTOR_SIZE);
 394     if (ret == (nb_sectors * BDRV_SECTOR_SIZE))
 395         ret = 0;
 396     return ret;
 397 }
 398
 399 /*
 400  * offset and count are in bytes and possibly not aligned. For files opened
 401  * with O_DIRECT, necessary alignments are ensured before calling
 402  * raw_pwrite_aligned to do the actual write.
 403  */
 404 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 405                       const uint8_t *buf, int count)
 406 {
 407     BDRVRawState *s = bs->opaque;
 408     int size, ret, shift, sum;
 409
 410     sum = 0;
 411
 412     if (s->aligned_buf != NULL) {
 413
 414         if (offset & 0x1ff) {
 415             /* align offset on a 512 bytes boundary */
 416             shift = offset & 0x1ff;
 417             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
 418             if (ret < 0)
 419                 return ret;
 420
 421             size = 512 - shift;
 422             if (size > count)
 423                 size = count;
 424             memcpy(s->aligned_buf + shift, buf, size);
 425
 426             ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
 427             if (ret < 0)
 428                 return ret;
 429
 430             buf += size;
 431             offset += size;
 432             count -= size;
 433             sum += size;
 434
 435             if (count == 0)
 436                 return sum;
 437         }
 438         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 439
 440             while ((size = (count & ~0x1ff)) != 0) {
 441
 442                 if (size > ALIGNED_BUFFER_SIZE)
 443                     size = ALIGNED_BUFFER_SIZE;
 444
 445                 memcpy(s->aligned_buf, buf, size);
 446
 447                 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
 448                 if (ret < 0)
 449                     return ret;
 450
 451                 buf += ret;
 452                 offset += ret;
 453                 count -= ret;
 454                 sum += ret;
 455             }
 456             /* here, count < 512 because (count & ~0x1ff) == 0 */
 457             if (count) {
 458                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
 459                 if (ret < 0)
 460                     return ret;
 461                  memcpy(s->aligned_buf, buf, count);
 462
 463                  ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
 464                  if (ret < 0)
 465                      return ret;
 466                  if (count < ret)
 467                      ret = count;
 468
 469                  sum += ret;
 470             }
 471             return sum;
 472         }
 473     }
 474     return raw_pwrite_aligned(bs, offset, buf, count) + sum;
 475 }
 476
 477 static int raw_write(BlockDriverState *bs, int64_t sector_num,
 478                      const uint8_t *buf, int nb_sectors)
 479 {
 480     int ret;
 481     ret = raw_pwrite(bs, sector_num * BDRV_SECTOR_SIZE, buf,
 482                      nb_sectors * BDRV_SECTOR_SIZE);
 483     if (ret == (nb_sectors * BDRV_SECTOR_SIZE))
 484         ret = 0;
 485     return ret;
 486 }
 487
 488 /*
 489  * Check if all memory in this vector is sector aligned.
 490  */
 491 static int qiov_is_aligned(QEMUIOVector *qiov)
 492 {
 493     int i;
 494
 495     for (i = 0; i < qiov->niov; i++) {
 496         if ((uintptr_t) qiov->iov[i].iov_base % BDRV_SECTOR_SIZE) {
 497             return 0;
 498         }
 499     }
 500
 501     return 1;
 502 }
 503
 504 static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
 505         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 506         BlockDriverCompletionFunc *cb, void *opaque, int type)
 507 {
 508     BDRVRawState *s = bs->opaque;
 509
 510     if (fd_open(bs) < 0)
 511         return NULL;
 512
 513     /*
 514      * If O_DIRECT is used the buffer needs to be aligned on a sector
 515      * boundary.  Check if this is the case or telll the low-level
 516      * driver that it needs to copy the buffer.
 517      */
 518     if (s->aligned_buf) {
 519         if (!qiov_is_aligned(qiov)) {
 520             type |= QEMU_AIO_MISALIGNED;
 521 #ifdef CONFIG_LINUX_AIO
 522         } else if (s->use_aio) {
 523             return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
 524                                nb_sectors, cb, opaque, type);
 525 #endif
 526         }
 527     }
 528
 529     return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
 530                        cb, opaque, type);
 531 }
 532
 533 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
 534         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 535         BlockDriverCompletionFunc *cb, void *opaque)
 536 {
 537     return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
 538                           cb, opaque, QEMU_AIO_READ);
 539 }
 540
 541 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
 542         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 543         BlockDriverCompletionFunc *cb, void *opaque)
 544 {
 545     return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
 546                           cb, opaque, QEMU_AIO_WRITE);
 547 }
 548
 549 static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
 550         BlockDriverCompletionFunc *cb, void *opaque)
 551 {
 552     BDRVRawState *s = bs->opaque;
 553
 554     if (fd_open(bs) < 0)
 555         return NULL;
 556
 557     return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
 558 }
 559
 560 static void raw_close(BlockDriverState *bs)
 561 {
 562     BDRVRawState *s = bs->opaque;
 563     if (s->fd >= 0) {
 564         close(s->fd);
 565         s->fd = -1;
 566         if (s->aligned_buf != NULL)
 567             qemu_vfree(s->aligned_buf);
 568     }
 569 }
 570
 571 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 572 {
 573     BDRVRawState *s = bs->opaque;
 574     if (s->type != FTYPE_FILE)
 575         return -ENOTSUP;
 576     if (ftruncate(s->fd, offset) < 0)
 577         return -errno;
 578     return 0;
 579 }
 580
 581 #ifdef __OpenBSD__
 582 static int64_t raw_getlength(BlockDriverState *bs)
 583 {
 584     BDRVRawState *s = bs->opaque;
 585     int fd = s->fd;
 586     struct stat st;
 587
 588     if (fstat(fd, &st))
 589         return -1;
 590     if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
 591         struct disklabel dl;
 592
 593         if (ioctl(fd, DIOCGDINFO, &dl))
 594             return -1;
 595         return (uint64_t)dl.d_secsize *
 596             dl.d_partitions[DISKPART(st.st_rdev)].p_size;
 597     } else
 598         return st.st_size;
 599 }
 600 #elif defined(__sun__)
 601 static int64_t raw_getlength(BlockDriverState *bs)
 602 {
 603     BDRVRawState *s = bs->opaque;
 604     struct dk_minfo minfo;
 605     int ret;
 606
 607     ret = fd_open(bs);
 608     if (ret < 0) {
 609         return ret;
 610     }
 611
 612     /*
 613      * Use the DKIOCGMEDIAINFO ioctl to read the size.
 614      */
 615     ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo);
 616     if (ret != -1) {
 617         return minfo.dki_lbsize * minfo.dki_capacity;
 618     }
 619
 620     /*
 621      * There are reports that lseek on some devices fails, but
 622      * irc discussion said that contingency on contingency was overkill.
 623      */
 624     return lseek(s->fd, 0, SEEK_END);
 625 }
 626 #elif defined(CONFIG_BSD)
 627 static int64_t raw_getlength(BlockDriverState *bs)
 628 {
 629     BDRVRawState *s = bs->opaque;
 630     int fd = s->fd;
 631     int64_t size;
 632     struct stat sb;
 633 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
 634     int reopened = 0;
 635 #endif
 636     int ret;
 637
 638     ret = fd_open(bs);
 639     if (ret < 0)
 640         return ret;
 641
 642 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
 643 again:
 644 #endif
 645     if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
 646 #ifdef DIOCGMEDIASIZE
 647         if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
 648 #elif defined(DIOCGPART)
 649         {
 650                 struct partinfo pi;
 651                 if (ioctl(fd, DIOCGPART, &pi) == 0)
 652                         size = pi.media_size;
 653                 else
 654                         size = 0;
 655         }
 656         if (size == 0)
 657 #endif
 658 #ifdef CONFIG_COCOA
 659         size = LONG_LONG_MAX;
 660 #else
 661         size = lseek(fd, 0LL, SEEK_END);
 662 #endif
 663 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 664         switch(s->type) {
 665         case FTYPE_CD:
 666             /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
 667             if (size == 2048LL * (unsigned)-1)
 668                 size = 0;
 669             /* XXX no disc?  maybe we need to reopen... */
 670             if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
 671                 reopened = 1;
 672                 goto again;
 673             }
 674         }
 675 #endif
 676     } else {
 677         size = lseek(fd, 0, SEEK_END);
 678     }
 679     return size;
 680 }
 681 #else
 682 static int64_t raw_getlength(BlockDriverState *bs)
 683 {
 684     BDRVRawState *s = bs->opaque;
 685     int ret;
 686
 687     ret = fd_open(bs);
 688     if (ret < 0) {
 689         return ret;
 690     }
 691
 692     return lseek(s->fd, 0, SEEK_END);
 693 }
 694 #endif
 695
 696 static int raw_create(const char *filename, QEMUOptionParameter *options)
 697 {
 698     int fd;
 699     int result = 0;
 700     int64_t total_size = 0;
 701
 702     /* Read out options */
 703     while (options && options->name) {
 704         if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
 705             total_size = options->value.n / BDRV_SECTOR_SIZE;
 706         }
 707         options++;
 708     }
 709
 710     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 711               0644);
 712     if (fd < 0) {
 713         result = -errno;
 714     } else {
 715         if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) {
 716             result = -errno;
 717         }
 718         if (close(fd) != 0) {
 719             result = -errno;
 720         }
 721     }
 722     return result;
 723 }
 724
 725 static void raw_flush(BlockDriverState *bs)
 726 {
 727     BDRVRawState *s = bs->opaque;
 728     qemu_fdatasync(s->fd);
 729 }
 730
 731
 732 static QEMUOptionParameter raw_create_options[] = {
 733     {
 734         .name = BLOCK_OPT_SIZE,
 735         .type = OPT_SIZE,
 736         .help = "Virtual disk size"
 737     },
 738     { NULL }
 739 };
 740
 741 static BlockDriver bdrv_file = {
 742     .format_name = "file",
 743     .protocol_name = "file",
 744     .instance_size = sizeof(BDRVRawState),
 745     .bdrv_probe = NULL, /* no probe for protocols */
 746     .bdrv_file_open = raw_open,
 747     .bdrv_read = raw_read,
 748     .bdrv_write = raw_write,
 749     .bdrv_close = raw_close,
 750     .bdrv_create = raw_create,
 751     .bdrv_flush = raw_flush,
 752
 753     .bdrv_aio_readv = raw_aio_readv,
 754     .bdrv_aio_writev = raw_aio_writev,
 755     .bdrv_aio_flush = raw_aio_flush,
 756
 757     .bdrv_truncate = raw_truncate,
 758     .bdrv_getlength = raw_getlength,
 759
 760     .create_options = raw_create_options,
 761 };
 762
 763 /***********************************************/
 764 /* host device */
 765
 766 #ifdef CONFIG_COCOA
 767 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
 768 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
 769
 770 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
 771 {
 772     kern_return_t       kernResult;
 773     mach_port_t     masterPort;
 774     CFMutableDictionaryRef  classesToMatch;
 775
 776     kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
 777     if ( KERN_SUCCESS != kernResult ) {
 778         printf( "IOMasterPort returned %d\n", kernResult );
 779     }
 780
 781     classesToMatch = IOServiceMatching( kIOCDMediaClass );
 782     if ( classesToMatch == NULL ) {
 783         printf( "IOServiceMatching returned a NULL dictionary.\n" );
 784     } else {
 785     CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
 786     }
 787     kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
 788     if ( KERN_SUCCESS != kernResult )
 789     {
 790         printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
 791     }
 792
 793     return kernResult;
 794 }
 795
 796 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
 797 {
 798     io_object_t     nextMedia;
 799     kern_return_t   kernResult = KERN_FAILURE;
 800     *bsdPath = '\0';
 801     nextMedia = IOIteratorNext( mediaIterator );
 802     if ( nextMedia )
 803     {
 804         CFTypeRef   bsdPathAsCFString;
 805     bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
 806         if ( bsdPathAsCFString ) {
 807             size_t devPathLength;
 808             strcpy( bsdPath, _PATH_DEV );
 809             strcat( bsdPath, "r" );
 810             devPathLength = strlen( bsdPath );
 811             if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
 812                 kernResult = KERN_SUCCESS;
 813             }
 814             CFRelease( bsdPathAsCFString );
 815         }
 816         IOObjectRelease( nextMedia );
 817     }
 818
 819     return kernResult;
 820 }
 821
 822 #endif
 823
 824 static int hdev_probe_device(const char *filename)
 825 {
 826     struct stat st;
 827
 828     /* allow a dedicated CD-ROM driver to match with a higher priority */
 829     if (strstart(filename, "/dev/cdrom", NULL))
 830         return 50;
 831
 832     if (stat(filename, &st) >= 0 &&
 833             (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
 834         return 100;
 835     }
 836
 837     return 0;
 838 }
 839
 840 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
 841 {
 842     BDRVRawState *s = bs->opaque;
 843
 844 #ifdef CONFIG_COCOA
 845     if (strstart(filename, "/dev/cdrom", NULL)) {
 846         kern_return_t kernResult;
 847         io_iterator_t mediaIterator;
 848         char bsdPath[ MAXPATHLEN ];
 849         int fd;
 850
 851         kernResult = FindEjectableCDMedia( &mediaIterator );
 852         kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
 853
 854         if ( bsdPath[ 0 ] != '\0' ) {
 855             strcat(bsdPath,"s0");
 856             /* some CDs don't have a partition 0 */
 857             fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
 858             if (fd < 0) {
 859                 bsdPath[strlen(bsdPath)-1] = '1';
 860             } else {
 861                 close(fd);
 862             }
 863             filename = bsdPath;
 864         }
 865
 866         if ( mediaIterator )
 867             IOObjectRelease( mediaIterator );
 868     }
 869 #endif
 870
 871     s->type = FTYPE_FILE;
 872 #if defined(__linux__)
 873     if (strstart(filename, "/dev/sg", NULL)) {
 874         bs->sg = 1;
 875     }
 876 #endif
 877
 878     return raw_open_common(bs, filename, flags, 0);
 879 }
 880
 881 #if defined(__linux__)
 882 /* Note: we do not have a reliable method to detect if the floppy is
 883    present. The current method is to try to open the floppy at every
 884    I/O and to keep it opened during a few hundreds of ms. */
 885 static int fd_open(BlockDriverState *bs)
 886 {
 887     BDRVRawState *s = bs->opaque;
 888     int last_media_present;
 889
 890     if (s->type != FTYPE_FD)
 891         return 0;
 892     last_media_present = (s->fd >= 0);
 893     if (s->fd >= 0 &&
 894         (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
 895         close(s->fd);
 896         s->fd = -1;
 897 #ifdef DEBUG_FLOPPY
 898         printf("Floppy closed\n");
 899 #endif
 900     }
 901     if (s->fd < 0) {
 902         if (s->fd_got_error &&
 903             (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
 904 #ifdef DEBUG_FLOPPY
 905             printf("No floppy (open delayed)\n");
 906 #endif
 907             return -EIO;
 908         }
 909         s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK);
 910         if (s->fd < 0) {
 911             s->fd_error_time = qemu_get_clock(rt_clock);
 912             s->fd_got_error = 1;
 913             if (last_media_present)
 914                 s->fd_media_changed = 1;
 915 #ifdef DEBUG_FLOPPY
 916             printf("No floppy\n");
 917 #endif
 918             return -EIO;
 919         }
 920 #ifdef DEBUG_FLOPPY
 921         printf("Floppy opened\n");
 922 #endif
 923     }
 924     if (!last_media_present)
 925         s->fd_media_changed = 1;
 926     s->fd_open_time = qemu_get_clock(rt_clock);
 927     s->fd_got_error = 0;
 928     return 0;
 929 }
 930
 931 static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
 932 {
 933     BDRVRawState *s = bs->opaque;
 934
 935     return ioctl(s->fd, req, buf);
 936 }
 937
 938 static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
 939         unsigned long int req, void *buf,
 940         BlockDriverCompletionFunc *cb, void *opaque)
 941 {
 942     BDRVRawState *s = bs->opaque;
 943
 944     if (fd_open(bs) < 0)
 945         return NULL;
 946     return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
 947 }
 948
 949 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 950 static int fd_open(BlockDriverState *bs)
 951 {
 952     BDRVRawState *s = bs->opaque;
 953
 954     /* this is just to ensure s->fd is sane (its called by io ops) */
 955     if (s->fd >= 0)
 956         return 0;
 957     return -EIO;
 958 }
 959 #else /* !linux && !FreeBSD */
 960
 961 static int fd_open(BlockDriverState *bs)
 962 {
 963     return 0;
 964 }
 965
 966 #endif /* !linux && !FreeBSD */
 967
 968 static int hdev_create(const char *filename, QEMUOptionParameter *options)
 969 {
 970     int fd;
 971     int ret = 0;
 972     struct stat stat_buf;
 973     int64_t total_size = 0;
 974
 975     /* Read out options */
 976     while (options && options->name) {
 977         if (!strcmp(options->name, "size")) {
 978             total_size = options->value.n / BDRV_SECTOR_SIZE;
 979         }
 980         options++;
 981     }
 982
 983     fd = open(filename, O_WRONLY | O_BINARY);
 984     if (fd < 0)
 985         return -errno;
 986
 987     if (fstat(fd, &stat_buf) < 0)
 988         ret = -errno;
 989     else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
 990         ret = -ENODEV;
 991     else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE)
 992         ret = -ENOSPC;
 993
 994     close(fd);
 995     return ret;
 996 }
 997
 998 static int hdev_has_zero_init(BlockDriverState *bs)
 999 {
1000     return 0;
1001 }
1002
1003 static BlockDriver bdrv_host_device = {
1004     .format_name        = "host_device",
1005     .protocol_name        = "host_device",
1006     .instance_size      = sizeof(BDRVRawState),
1007     .bdrv_probe_device  = hdev_probe_device,
1008     .bdrv_file_open     = hdev_open,
1009     .bdrv_close         = raw_close,
1010     .bdrv_create        = hdev_create,
1011     .create_options     = raw_create_options,
1012     .bdrv_has_zero_init = hdev_has_zero_init,
1013     .bdrv_flush         = raw_flush,
1014
1015     .bdrv_aio_readv     = raw_aio_readv,
1016     .bdrv_aio_writev    = raw_aio_writev,
1017     .bdrv_aio_flush     = raw_aio_flush,
1018
1019     .bdrv_read          = raw_read,
1020     .bdrv_write         = raw_write,
1021     .bdrv_getlength     = raw_getlength,
1022
1023     /* generic scsi device */
1024 #ifdef __linux__
1025     .bdrv_ioctl         = hdev_ioctl,
1026     .bdrv_aio_ioctl     = hdev_aio_ioctl,
1027 #endif
1028 };
1029
1030 #ifdef __linux__
1031 static int floppy_open(BlockDriverState *bs, const char *filename, int flags)
1032 {
1033     BDRVRawState *s = bs->opaque;
1034     int ret;
1035
1036     s->type = FTYPE_FD;
1037
1038     /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
1039     ret = raw_open_common(bs, filename, flags, O_NONBLOCK);
1040     if (ret)
1041         return ret;
1042
1043     /* close fd so that we can reopen it as needed */
1044     close(s->fd);
1045     s->fd = -1;
1046     s->fd_media_changed = 1;
1047
1048     return 0;
1049 }
1050
1051 static int floppy_probe_device(const char *filename)
1052 {
1053     int fd, ret;
1054     int prio = 0;
1055     struct floppy_struct fdparam;
1056
1057     if (strstart(filename, "/dev/fd", NULL))
1058         prio = 50;
1059
1060     fd = open(filename, O_RDONLY | O_NONBLOCK);
1061     if (fd < 0) {
1062         goto out;
1063     }
1064
1065     /* Attempt to detect via a floppy specific ioctl */
1066     ret = ioctl(fd, FDGETPRM, &fdparam);
1067     if (ret >= 0)
1068         prio = 100;
1069
1070     close(fd);
1071 out:
1072     return prio;
1073 }
1074
1075
1076 static int floppy_is_inserted(BlockDriverState *bs)
1077 {
1078     return fd_open(bs) >= 0;
1079 }
1080
1081 static int floppy_media_changed(BlockDriverState *bs)
1082 {
1083     BDRVRawState *s = bs->opaque;
1084     int ret;
1085
1086     /*
1087      * XXX: we do not have a true media changed indication.
1088      * It does not work if the floppy is changed without trying to read it.
1089      */
1090     fd_open(bs);
1091     ret = s->fd_media_changed;
1092     s->fd_media_changed = 0;
1093 #ifdef DEBUG_FLOPPY
1094     printf("Floppy changed=%d\n", ret);
1095 #endif
1096     return ret;
1097 }
1098
1099 static int floppy_eject(BlockDriverState *bs, int eject_flag)
1100 {
1101     BDRVRawState *s = bs->opaque;
1102     int fd;
1103
1104     if (s->fd >= 0) {
1105         close(s->fd);
1106         s->fd = -1;
1107     }
1108     fd = open(bs->filename, s->open_flags | O_NONBLOCK);
1109     if (fd >= 0) {
1110         if (ioctl(fd, FDEJECT, 0) < 0)
1111             perror("FDEJECT");
1112         close(fd);
1113     }
1114
1115     return 0;
1116 }
1117
1118 static BlockDriver bdrv_host_floppy = {
1119     .format_name        = "host_floppy",
1120     .protocol_name      = "host_floppy",
1121     .instance_size      = sizeof(BDRVRawState),
1122     .bdrv_probe_device  = floppy_probe_device,
1123     .bdrv_file_open     = floppy_open,
1124     .bdrv_close         = raw_close,
1125     .bdrv_create        = hdev_create,
1126     .create_options     = raw_create_options,
1127     .bdrv_has_zero_init = hdev_has_zero_init,
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     .protocol_name      = "host_cdrom",
1221     .instance_size      = sizeof(BDRVRawState),
1222     .bdrv_probe_device  = cdrom_probe_device,
1223     .bdrv_file_open     = cdrom_open,
1224     .bdrv_close         = raw_close,
1225     .bdrv_create        = hdev_create,
1226     .create_options     = raw_create_options,
1227     .bdrv_has_zero_init = hdev_has_zero_init,
1228     .bdrv_flush         = raw_flush,
1229
1230     .bdrv_aio_readv     = raw_aio_readv,
1231     .bdrv_aio_writev    = raw_aio_writev,
1232     .bdrv_aio_flush     = raw_aio_flush,
1233
1234     .bdrv_read          = raw_read,
1235     .bdrv_write         = raw_write,
1236     .bdrv_getlength     = raw_getlength,
1237
1238     /* removable device support */
1239     .bdrv_is_inserted   = cdrom_is_inserted,
1240     .bdrv_eject         = cdrom_eject,
1241     .bdrv_set_locked    = cdrom_set_locked,
1242
1243     /* generic scsi device */
1244     .bdrv_ioctl         = hdev_ioctl,
1245     .bdrv_aio_ioctl     = hdev_aio_ioctl,
1246 };
1247 #endif /* __linux__ */
1248
1249 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
1250 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1251 {
1252     BDRVRawState *s = bs->opaque;
1253     int ret;
1254
1255     s->type = FTYPE_CD;
1256
1257     ret = raw_open_common(bs, filename, flags, 0);
1258     if (ret)
1259         return ret;
1260
1261     /* make sure the door isnt locked at this time */
1262     ioctl(s->fd, CDIOCALLOW);
1263     return 0;
1264 }
1265
1266 static int cdrom_probe_device(const char *filename)
1267 {
1268     if (strstart(filename, "/dev/cd", NULL) ||
1269             strstart(filename, "/dev/acd", NULL))
1270         return 100;
1271     return 0;
1272 }
1273
1274 static int cdrom_reopen(BlockDriverState *bs)
1275 {
1276     BDRVRawState *s = bs->opaque;
1277     int fd;
1278
1279     /*
1280      * Force reread of possibly changed/newly loaded disc,
1281      * FreeBSD seems to not notice sometimes...
1282      */
1283     if (s->fd >= 0)
1284         close(s->fd);
1285     fd = open(bs->filename, s->open_flags, 0644);
1286     if (fd < 0) {
1287         s->fd = -1;
1288         return -EIO;
1289     }
1290     s->fd = fd;
1291
1292     /* make sure the door isnt locked at this time */
1293     ioctl(s->fd, CDIOCALLOW);
1294     return 0;
1295 }
1296
1297 static int cdrom_is_inserted(BlockDriverState *bs)
1298 {
1299     return raw_getlength(bs) > 0;
1300 }
1301
1302 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1303 {
1304     BDRVRawState *s = bs->opaque;
1305
1306     if (s->fd < 0)
1307         return -ENOTSUP;
1308
1309     (void) ioctl(s->fd, CDIOCALLOW);
1310
1311     if (eject_flag) {
1312         if (ioctl(s->fd, CDIOCEJECT) < 0)
1313             perror("CDIOCEJECT");
1314     } else {
1315         if (ioctl(s->fd, CDIOCCLOSE) < 0)
1316             perror("CDIOCCLOSE");
1317     }
1318
1319     if (cdrom_reopen(bs) < 0)
1320         return -ENOTSUP;
1321     return 0;
1322 }
1323
1324 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1325 {
1326     BDRVRawState *s = bs->opaque;
1327
1328     if (s->fd < 0)
1329         return -ENOTSUP;
1330     if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1331         /*
1332          * Note: an error can happen if the distribution automatically
1333          * mounts the CD-ROM
1334          */
1335         /* perror("CDROM_LOCKDOOR"); */
1336     }
1337
1338     return 0;
1339 }
1340
1341 static BlockDriver bdrv_host_cdrom = {
1342     .format_name        = "host_cdrom",
1343     .protocol_name      = "host_cdrom",
1344     .instance_size      = sizeof(BDRVRawState),
1345     .bdrv_probe_device  = cdrom_probe_device,
1346     .bdrv_file_open     = cdrom_open,
1347     .bdrv_close         = raw_close,
1348     .bdrv_create        = hdev_create,
1349     .create_options     = raw_create_options,
1350     .bdrv_has_zero_init = hdev_has_zero_init,
1351     .bdrv_flush         = raw_flush,
1352
1353     .bdrv_aio_readv     = raw_aio_readv,
1354     .bdrv_aio_writev    = raw_aio_writev,
1355     .bdrv_aio_flush     = raw_aio_flush,
1356
1357     .bdrv_read          = raw_read,
1358     .bdrv_write         = raw_write,
1359     .bdrv_getlength     = raw_getlength,
1360
1361     /* removable device support */
1362     .bdrv_is_inserted   = cdrom_is_inserted,
1363     .bdrv_eject         = cdrom_eject,
1364     .bdrv_set_locked    = cdrom_set_locked,
1365 };
1366 #endif /* __FreeBSD__ */
1367
1368 static void bdrv_file_init(void)
1369 {
1370     /*
1371      * Register all the drivers.  Note that order is important, the driver
1372      * registered last will get probed first.
1373      */
1374     bdrv_register(&bdrv_file);
1375     bdrv_register(&bdrv_host_device);
1376 #ifdef __linux__
1377     bdrv_register(&bdrv_host_floppy);
1378     bdrv_register(&bdrv_host_cdrom);
1379 #endif
1380 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
1381     bdrv_register(&bdrv_host_cdrom);
1382 #endif
1383 }
1384
1385 block_init(bdrv_file_init);