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 "block_int.h"
  28 #include "compatfd.h"
  29 #include <assert.h>
  30 #ifdef CONFIG_AIO
  31 #include "posix-aio-compat.h"
  32 #endif
  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 #ifdef __FreeBSD__
  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, args...) do { if (qemu_log_enabled())     \
  78     { qemu_log(formatCstr, ##args); qemu_log_flush(); } } while (0)
  79 #else
  80 #define DEBUG_BLOCK_PRINT(formatCstr, args...)
  81 #endif
  82
  83 /* OS X does not have O_DSYNC */
  84 #ifndef O_DSYNC
  85 #define O_DSYNC O_SYNC
  86 #endif
  87
  88 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
  89 #ifndef O_DIRECT
  90 #define O_DIRECT O_DSYNC
  91 #endif
  92
  93 #define FTYPE_FILE   0
  94 #define FTYPE_CD     1
  95 #define FTYPE_FD     2
  96
  97 #define ALIGNED_BUFFER_SIZE (32 * 512)
  98
  99 /* if the FD is not accessed during that time (in ms), we try to
 100    reopen it to see if the disk has been changed */
 101 #define FD_OPEN_TIMEOUT 1000
 102
 103 typedef struct BDRVRawState {
 104     int fd;
 105     int type;
 106     unsigned int lseek_err_cnt;
 107 #if defined(__linux__)
 108     /* linux floppy specific */
 109     int fd_open_flags;
 110     int64_t fd_open_time;
 111     int64_t fd_error_time;
 112     int fd_got_error;
 113     int fd_media_changed;
 114 #endif
 115 #if defined(__FreeBSD__)
 116     int cd_open_flags;
 117 #endif
 118     uint8_t* aligned_buf;
 119 } BDRVRawState;
 120
 121 static int posix_aio_init(void);
 122
 123 static int fd_open(BlockDriverState *bs);
 124
 125 #if defined(__FreeBSD__)
 126 static int cd_open(BlockDriverState *bs);
 127 #endif
 128
 129 static int raw_is_inserted(BlockDriverState *bs);
 130
 131 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 132 {
 133     BDRVRawState *s = bs->opaque;
 134     int fd, open_flags, ret;
 135
 136     posix_aio_init();
 137
 138     s->lseek_err_cnt = 0;
 139
 140     open_flags = O_BINARY;
 141     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 142         open_flags |= O_RDWR;
 143     } else {
 144         open_flags |= O_RDONLY;
 145         bs->read_only = 1;
 146     }
 147     if (flags & BDRV_O_CREAT)
 148         open_flags |= O_CREAT | O_TRUNC;
 149
 150     /* Use O_DSYNC for write-through caching, no flags for write-back caching,
 151      * and O_DIRECT for no caching. */
 152     if ((flags & BDRV_O_NOCACHE))
 153         open_flags |= O_DIRECT;
 154     else if (!(flags & BDRV_O_CACHE_WB))
 155         open_flags |= O_DSYNC;
 156
 157     s->type = FTYPE_FILE;
 158
 159     fd = open(filename, open_flags, 0644);
 160     if (fd < 0) {
 161         ret = -errno;
 162         if (ret == -EROFS)
 163             ret = -EACCES;
 164         return ret;
 165     }
 166     s->fd = fd;
 167     s->aligned_buf = NULL;
 168     if ((flags & BDRV_O_NOCACHE)) {
 169         s->aligned_buf = qemu_memalign(512, ALIGNED_BUFFER_SIZE);
 170         if (s->aligned_buf == NULL) {
 171             ret = -errno;
 172             close(fd);
 173             return ret;
 174         }
 175     }
 176     return 0;
 177 }
 178
 179 /* XXX: use host sector size if necessary with:
 180 #ifdef DIOCGSECTORSIZE
 181         {
 182             unsigned int sectorsize = 512;
 183             if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
 184                 sectorsize > bufsize)
 185                 bufsize = sectorsize;
 186         }
 187 #endif
 188 #ifdef CONFIG_COCOA
 189         u_int32_t   blockSize = 512;
 190         if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
 191             bufsize = blockSize;
 192         }
 193 #endif
 194 */
 195
 196 /*
 197  * offset and count are in bytes, but must be multiples of 512 for files
 198  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 199  *
 200  * This function may be called without alignment if the caller ensures
 201  * that O_DIRECT is not in effect.
 202  */
 203 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
 204                      uint8_t *buf, int count)
 205 {
 206     BDRVRawState *s = bs->opaque;
 207     int ret;
 208
 209     ret = fd_open(bs);
 210     if (ret < 0)
 211         return ret;
 212
 213     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
 214         ++(s->lseek_err_cnt);
 215         if(s->lseek_err_cnt <= 10) {
 216             DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 217                               "] lseek failed : %d = %s\n",
 218                               s->fd, bs->filename, offset, buf, count,
 219                               bs->total_sectors, errno, strerror(errno));
 220         }
 221         return -1;
 222     }
 223     s->lseek_err_cnt=0;
 224
 225     ret = read(s->fd, buf, count);
 226     if (ret == count)
 227         goto label__raw_read__success;
 228
 229     DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 230                       "] read failed %d : %d = %s\n",
 231                       s->fd, bs->filename, offset, buf, count,
 232                       bs->total_sectors, ret, errno, strerror(errno));
 233
 234     /* Try harder for CDrom. */
 235     if (bs->type == BDRV_TYPE_CDROM) {
 236         lseek(s->fd, offset, SEEK_SET);
 237         ret = read(s->fd, buf, count);
 238         if (ret == count)
 239             goto label__raw_read__success;
 240         lseek(s->fd, offset, SEEK_SET);
 241         ret = read(s->fd, buf, count);
 242         if (ret == count)
 243             goto label__raw_read__success;
 244
 245         DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 246                           "] retry read failed %d : %d = %s\n",
 247                           s->fd, bs->filename, offset, buf, count,
 248                           bs->total_sectors, ret, errno, strerror(errno));
 249     }
 250
 251 label__raw_read__success:
 252
 253     return ret;
 254 }
 255
 256 /*
 257  * offset and count are in bytes, but must be multiples of 512 for files
 258  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 259  *
 260  * This function may be called without alignment if the caller ensures
 261  * that O_DIRECT is not in effect.
 262  */
 263 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
 264                       const uint8_t *buf, int count)
 265 {
 266     BDRVRawState *s = bs->opaque;
 267     int ret;
 268
 269     ret = fd_open(bs);
 270     if (ret < 0)
 271         return -errno;
 272
 273     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
 274         ++(s->lseek_err_cnt);
 275         if(s->lseek_err_cnt) {
 276             DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
 277                               PRId64 "] lseek failed : %d = %s\n",
 278                               s->fd, bs->filename, offset, buf, count,
 279                               bs->total_sectors, errno, strerror(errno));
 280         }
 281         return -EIO;
 282     }
 283     s->lseek_err_cnt = 0;
 284
 285     ret = write(s->fd, buf, count);
 286     if (ret == count)
 287         goto label__raw_write__success;
 288
 289     DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 290                       "] write failed %d : %d = %s\n",
 291                       s->fd, bs->filename, offset, buf, count,
 292                       bs->total_sectors, ret, errno, strerror(errno));
 293
 294 label__raw_write__success:
 295
 296     return  (ret < 0) ? -errno : ret;
 297 }
 298
 299
 300 /*
 301  * offset and count are in bytes and possibly not aligned. For files opened
 302  * with O_DIRECT, necessary alignments are ensured before calling
 303  * raw_pread_aligned to do the actual read.
 304  */
 305 static int raw_pread(BlockDriverState *bs, int64_t offset,
 306                      uint8_t *buf, int count)
 307 {
 308     BDRVRawState *s = bs->opaque;
 309     int size, ret, shift, sum;
 310
 311     sum = 0;
 312
 313     if (s->aligned_buf != NULL)  {
 314
 315         if (offset & 0x1ff) {
 316             /* align offset on a 512 bytes boundary */
 317
 318             shift = offset & 0x1ff;
 319             size = (shift + count + 0x1ff) & ~0x1ff;
 320             if (size > ALIGNED_BUFFER_SIZE)
 321                 size = ALIGNED_BUFFER_SIZE;
 322             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
 323             if (ret < 0)
 324                 return ret;
 325
 326             size = 512 - shift;
 327             if (size > count)
 328                 size = count;
 329             memcpy(buf, s->aligned_buf + shift, size);
 330
 331             buf += size;
 332             offset += size;
 333             count -= size;
 334             sum += size;
 335
 336             if (count == 0)
 337                 return sum;
 338         }
 339         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 340
 341             /* read on aligned buffer */
 342
 343             while (count) {
 344
 345                 size = (count + 0x1ff) & ~0x1ff;
 346                 if (size > ALIGNED_BUFFER_SIZE)
 347                     size = ALIGNED_BUFFER_SIZE;
 348
 349                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
 350                 if (ret < 0)
 351                     return ret;
 352
 353                 size = ret;
 354                 if (size > count)
 355                     size = count;
 356
 357                 memcpy(buf, s->aligned_buf, size);
 358
 359                 buf += size;
 360                 offset += size;
 361                 count -= size;
 362                 sum += size;
 363             }
 364
 365             return sum;
 366         }
 367     }
 368
 369     return raw_pread_aligned(bs, offset, buf, count) + sum;
 370 }
 371
 372 static int raw_read(BlockDriverState *bs, int64_t sector_num,
 373                     uint8_t *buf, int nb_sectors)
 374 {
 375     int ret;
 376
 377     ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
 378     if (ret == (nb_sectors * 512))
 379         ret = 0;
 380     return ret;
 381 }
 382
 383 /*
 384  * offset and count are in bytes and possibly not aligned. For files opened
 385  * with O_DIRECT, necessary alignments are ensured before calling
 386  * raw_pwrite_aligned to do the actual write.
 387  */
 388 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 389                       const uint8_t *buf, int count)
 390 {
 391     BDRVRawState *s = bs->opaque;
 392     int size, ret, shift, sum;
 393
 394     sum = 0;
 395
 396     if (s->aligned_buf != NULL) {
 397
 398         if (offset & 0x1ff) {
 399             /* align offset on a 512 bytes boundary */
 400             shift = offset & 0x1ff;
 401             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
 402             if (ret < 0)
 403                 return ret;
 404
 405             size = 512 - shift;
 406             if (size > count)
 407                 size = count;
 408             memcpy(s->aligned_buf + shift, buf, size);
 409
 410             ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
 411             if (ret < 0)
 412                 return ret;
 413
 414             buf += size;
 415             offset += size;
 416             count -= size;
 417             sum += size;
 418
 419             if (count == 0)
 420                 return sum;
 421         }
 422         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 423
 424             while ((size = (count & ~0x1ff)) != 0) {
 425
 426                 if (size > ALIGNED_BUFFER_SIZE)
 427                     size = ALIGNED_BUFFER_SIZE;
 428
 429                 memcpy(s->aligned_buf, buf, size);
 430
 431                 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
 432                 if (ret < 0)
 433                     return ret;
 434
 435                 buf += ret;
 436                 offset += ret;
 437                 count -= ret;
 438                 sum += ret;
 439             }
 440             /* here, count < 512 because (count & ~0x1ff) == 0 */
 441             if (count) {
 442                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
 443                 if (ret < 0)
 444                     return ret;
 445                  memcpy(s->aligned_buf, buf, count);
 446
 447                  ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
 448                  if (ret < 0)
 449                      return ret;
 450                  if (count < ret)
 451                      ret = count;
 452
 453                  sum += ret;
 454             }
 455             return sum;
 456         }
 457     }
 458     return raw_pwrite_aligned(bs, offset, buf, count) + sum;
 459 }
 460
 461 static int raw_write(BlockDriverState *bs, int64_t sector_num,
 462                      const uint8_t *buf, int nb_sectors)
 463 {
 464     int ret;
 465     ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
 466     if (ret == (nb_sectors * 512))
 467         ret = 0;
 468     return ret;
 469 }
 470
 471 #ifdef CONFIG_AIO
 472 /***********************************************************/
 473 /* Unix AIO using POSIX AIO */
 474
 475 typedef struct RawAIOCB {
 476     BlockDriverAIOCB common;
 477     struct qemu_paiocb aiocb;
 478     struct RawAIOCB *next;
 479     int ret;
 480 } RawAIOCB;
 481
 482 typedef struct PosixAioState
 483 {
 484     int fd;
 485     RawAIOCB *first_aio;
 486 } PosixAioState;
 487
 488 static void posix_aio_read(void *opaque)
 489 {
 490     PosixAioState *s = opaque;
 491     RawAIOCB *acb, **pacb;
 492     int ret;
 493     size_t offset;
 494     union {
 495         struct qemu_signalfd_siginfo siginfo;
 496         char buf[128];
 497     } sig;
 498
 499     /* try to read from signalfd, don't freak out if we can't read anything */
 500     offset = 0;
 501     while (offset < 128) {
 502         ssize_t len;
 503
 504         len = read(s->fd, sig.buf + offset, 128 - offset);
 505         if (len == -1 && errno == EINTR)
 506             continue;
 507         if (len == -1 && errno == EAGAIN) {
 508             /* there is no natural reason for this to happen,
 509              * so we'll spin hard until we get everything just
 510              * to be on the safe side. */
 511             if (offset > 0)
 512                 continue;
 513         }
 514
 515         offset += len;
 516     }
 517
 518     for(;;) {
 519         pacb = &s->first_aio;
 520         for(;;) {
 521             acb = *pacb;
 522             if (!acb)
 523                 goto the_end;
 524             ret = qemu_paio_error(&acb->aiocb);
 525             if (ret == ECANCELED) {
 526                 /* remove the request */
 527                 *pacb = acb->next;
 528                 qemu_aio_release(acb);
 529             } else if (ret != EINPROGRESS) {
 530                 /* end of aio */
 531                 if (ret == 0) {
 532                     ret = qemu_paio_return(&acb->aiocb);
 533                     if (ret == acb->aiocb.aio_nbytes)
 534                         ret = 0;
 535                     else
 536                         ret = -EINVAL;
 537                 } else {
 538                     ret = -ret;
 539                 }
 540                 /* remove the request */
 541                 *pacb = acb->next;
 542                 /* call the callback */
 543                 acb->common.cb(acb->common.opaque, ret);
 544                 qemu_aio_release(acb);
 545                 break;
 546             } else {
 547                 pacb = &acb->next;
 548             }
 549         }
 550     }
 551  the_end: ;
 552 }
 553
 554 static int posix_aio_flush(void *opaque)
 555 {
 556     PosixAioState *s = opaque;
 557     return !!s->first_aio;
 558 }
 559
 560 static PosixAioState *posix_aio_state;
 561
 562 static int posix_aio_init(void)
 563 {
 564     sigset_t mask;
 565     PosixAioState *s;
 566     struct qemu_paioinit ai;
 567
 568     if (posix_aio_state)
 569         return 0;
 570
 571     s = qemu_malloc(sizeof(PosixAioState));
 572
 573     /* Make sure to block AIO signal */
 574     sigemptyset(&mask);
 575     sigaddset(&mask, SIGUSR2);
 576     sigprocmask(SIG_BLOCK, &mask, NULL);
 577
 578     s->first_aio = NULL;
 579     s->fd = qemu_signalfd(&mask);
 580     if (s->fd == -1) {
 581         fprintf(stderr, "failed to create signalfd\n");
 582         return -errno;
 583     }
 584
 585     fcntl(s->fd, F_SETFL, O_NONBLOCK);
 586
 587     qemu_aio_set_fd_handler(s->fd, posix_aio_read, NULL, posix_aio_flush, s);
 588
 589     memset(&ai, 0, sizeof(ai));
 590     ai.aio_threads = 64;
 591     ai.aio_num = 64;
 592     qemu_paio_init(&ai);
 593
 594     posix_aio_state = s;
 595
 596     return 0;
 597 }
 598
 599 static RawAIOCB *raw_aio_setup(BlockDriverState *bs, int64_t sector_num,
 600         QEMUIOVector *qiov, int nb_sectors,
 601         BlockDriverCompletionFunc *cb, void *opaque)
 602 {
 603     BDRVRawState *s = bs->opaque;
 604     RawAIOCB *acb;
 605
 606     if (fd_open(bs) < 0)
 607         return NULL;
 608
 609     acb = qemu_aio_get(bs, cb, opaque);
 610     if (!acb)
 611         return NULL;
 612     acb->aiocb.aio_fildes = s->fd;
 613     acb->aiocb.ev_signo = SIGUSR2;
 614     acb->aiocb.aio_iov = qiov->iov;
 615     acb->aiocb.aio_niov = qiov->niov;
 616     acb->aiocb.aio_nbytes = nb_sectors * 512;
 617     acb->aiocb.aio_offset = sector_num * 512;
 618     acb->aiocb.aio_flags = 0;
 619
 620     /*
 621      * If O_DIRECT is used the buffer needs to be aligned on a sector
 622      * boundary. Tell the low level code to ensure that in case it's
 623      * not done yet.
 624      */
 625     if (s->aligned_buf)
 626         acb->aiocb.aio_flags |= QEMU_AIO_SECTOR_ALIGNED;
 627
 628     acb->next = posix_aio_state->first_aio;
 629     posix_aio_state->first_aio = acb;
 630     return acb;
 631 }
 632
 633 static void raw_aio_remove(RawAIOCB *acb)
 634 {
 635     RawAIOCB **pacb;
 636
 637     /* remove the callback from the queue */
 638     pacb = &posix_aio_state->first_aio;
 639     for(;;) {
 640         if (*pacb == NULL) {
 641             fprintf(stderr, "raw_aio_remove: aio request not found!\n");
 642             break;
 643         } else if (*pacb == acb) {
 644             *pacb = acb->next;
 645             qemu_aio_release(acb);
 646             break;
 647         }
 648         pacb = &(*pacb)->next;
 649     }
 650 }
 651
 652 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
 653         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 654         BlockDriverCompletionFunc *cb, void *opaque)
 655 {
 656     RawAIOCB *acb;
 657
 658     acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
 659     if (!acb)
 660         return NULL;
 661     if (qemu_paio_read(&acb->aiocb) < 0) {
 662         raw_aio_remove(acb);
 663         return NULL;
 664     }
 665     return &acb->common;
 666 }
 667
 668 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
 669         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 670         BlockDriverCompletionFunc *cb, void *opaque)
 671 {
 672     RawAIOCB *acb;
 673
 674     acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
 675     if (!acb)
 676         return NULL;
 677     if (qemu_paio_write(&acb->aiocb) < 0) {
 678         raw_aio_remove(acb);
 679         return NULL;
 680     }
 681     return &acb->common;
 682 }
 683
 684 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
 685 {
 686     int ret;
 687     RawAIOCB *acb = (RawAIOCB *)blockacb;
 688
 689     ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
 690     if (ret == QEMU_PAIO_NOTCANCELED) {
 691         /* fail safe: if the aio could not be canceled, we wait for
 692            it */
 693         while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
 694     }
 695
 696     raw_aio_remove(acb);
 697 }
 698 #else /* CONFIG_AIO */
 699 static int posix_aio_init(void)
 700 {
 701     return 0;
 702 }
 703 #endif /* CONFIG_AIO */
 704
 705
 706 static void raw_close(BlockDriverState *bs)
 707 {
 708     BDRVRawState *s = bs->opaque;
 709     if (s->fd >= 0) {
 710         close(s->fd);
 711         s->fd = -1;
 712         if (s->aligned_buf != NULL)
 713             qemu_free(s->aligned_buf);
 714     }
 715 }
 716
 717 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 718 {
 719     BDRVRawState *s = bs->opaque;
 720     if (s->type != FTYPE_FILE)
 721         return -ENOTSUP;
 722     if (ftruncate(s->fd, offset) < 0)
 723         return -errno;
 724     return 0;
 725 }
 726
 727 #ifdef __OpenBSD__
 728 static int64_t raw_getlength(BlockDriverState *bs)
 729 {
 730     BDRVRawState *s = bs->opaque;
 731     int fd = s->fd;
 732     struct stat st;
 733
 734     if (fstat(fd, &st))
 735         return -1;
 736     if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
 737         struct disklabel dl;
 738
 739         if (ioctl(fd, DIOCGDINFO, &dl))
 740             return -1;
 741         return (uint64_t)dl.d_secsize *
 742             dl.d_partitions[DISKPART(st.st_rdev)].p_size;
 743     } else
 744         return st.st_size;
 745 }
 746 #else /* !__OpenBSD__ */
 747 static int64_t  raw_getlength(BlockDriverState *bs)
 748 {
 749     BDRVRawState *s = bs->opaque;
 750     int fd = s->fd;
 751     int64_t size;
 752 #ifdef HOST_BSD
 753     struct stat sb;
 754 #ifdef __FreeBSD__
 755     int reopened = 0;
 756 #endif
 757 #endif
 758 #ifdef __sun__
 759     struct dk_minfo minfo;
 760     int rv;
 761 #endif
 762     int ret;
 763
 764     ret = fd_open(bs);
 765     if (ret < 0)
 766         return ret;
 767
 768 #ifdef HOST_BSD
 769 #ifdef __FreeBSD__
 770 again:
 771 #endif
 772     if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
 773 #ifdef DIOCGMEDIASIZE
 774         if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
 775 #elif defined(DIOCGPART)
 776         {
 777                 struct partinfo pi;
 778                 if (ioctl(fd, DIOCGPART, &pi) == 0)
 779                         size = pi.media_size;
 780                 else
 781                         size = 0;
 782         }
 783         if (size == 0)
 784 #endif
 785 #ifdef CONFIG_COCOA
 786         size = LONG_LONG_MAX;
 787 #else
 788         size = lseek(fd, 0LL, SEEK_END);
 789 #endif
 790 #ifdef __FreeBSD__
 791         switch(s->type) {
 792         case FTYPE_CD:
 793             /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
 794             if (size == 2048LL * (unsigned)-1)
 795                 size = 0;
 796             /* XXX no disc?  maybe we need to reopen... */
 797             if (size <= 0 && !reopened && cd_open(bs) >= 0) {
 798                 reopened = 1;
 799                 goto again;
 800             }
 801         }
 802 #endif
 803     } else
 804 #endif
 805 #ifdef __sun__
 806     /*
 807      * use the DKIOCGMEDIAINFO ioctl to read the size.
 808      */
 809     rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
 810     if ( rv != -1 ) {
 811         size = minfo.dki_lbsize * minfo.dki_capacity;
 812     } else /* there are reports that lseek on some devices
 813               fails, but irc discussion said that contingency
 814               on contingency was overkill */
 815 #endif
 816     {
 817         size = lseek(fd, 0, SEEK_END);
 818     }
 819     return size;
 820 }
 821 #endif
 822
 823 static int raw_create(const char *filename, int64_t total_size,
 824                       const char *backing_file, int flags)
 825 {
 826     int fd;
 827
 828     if (flags || backing_file)
 829         return -ENOTSUP;
 830
 831     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 832               0644);
 833     if (fd < 0)
 834         return -EIO;
 835     ftruncate(fd, total_size * 512);
 836     close(fd);
 837     return 0;
 838 }
 839
 840 static void raw_flush(BlockDriverState *bs)
 841 {
 842     BDRVRawState *s = bs->opaque;
 843     fsync(s->fd);
 844 }
 845
 846 BlockDriver bdrv_raw = {
 847     .format_name = "raw",
 848     .instance_size = sizeof(BDRVRawState),
 849     .bdrv_probe = NULL, /* no probe for protocols */
 850     .bdrv_open = raw_open,
 851     .bdrv_read = raw_read,
 852     .bdrv_write = raw_write,
 853     .bdrv_close = raw_close,
 854     .bdrv_create = raw_create,
 855     .bdrv_flush = raw_flush,
 856
 857 #ifdef CONFIG_AIO
 858     .bdrv_aio_readv = raw_aio_readv,
 859     .bdrv_aio_writev = raw_aio_writev,
 860     .bdrv_aio_cancel = raw_aio_cancel,
 861     .aiocb_size = sizeof(RawAIOCB),
 862 #endif
 863
 864     .bdrv_truncate = raw_truncate,
 865     .bdrv_getlength = raw_getlength,
 866 };
 867
 868 /***********************************************/
 869 /* host device */
 870
 871 #ifdef CONFIG_COCOA
 872 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
 873 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
 874
 875 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
 876 {
 877     kern_return_t       kernResult;
 878     mach_port_t     masterPort;
 879     CFMutableDictionaryRef  classesToMatch;
 880
 881     kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
 882     if ( KERN_SUCCESS != kernResult ) {
 883         printf( "IOMasterPort returned %d\n", kernResult );
 884     }
 885
 886     classesToMatch = IOServiceMatching( kIOCDMediaClass );
 887     if ( classesToMatch == NULL ) {
 888         printf( "IOServiceMatching returned a NULL dictionary.\n" );
 889     } else {
 890     CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
 891     }
 892     kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
 893     if ( KERN_SUCCESS != kernResult )
 894     {
 895         printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
 896     }
 897
 898     return kernResult;
 899 }
 900
 901 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
 902 {
 903     io_object_t     nextMedia;
 904     kern_return_t   kernResult = KERN_FAILURE;
 905     *bsdPath = '\0';
 906     nextMedia = IOIteratorNext( mediaIterator );
 907     if ( nextMedia )
 908     {
 909         CFTypeRef   bsdPathAsCFString;
 910     bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
 911         if ( bsdPathAsCFString ) {
 912             size_t devPathLength;
 913             strcpy( bsdPath, _PATH_DEV );
 914             strcat( bsdPath, "r" );
 915             devPathLength = strlen( bsdPath );
 916             if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
 917                 kernResult = KERN_SUCCESS;
 918             }
 919             CFRelease( bsdPathAsCFString );
 920         }
 921         IOObjectRelease( nextMedia );
 922     }
 923
 924     return kernResult;
 925 }
 926
 927 #endif
 928
 929 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
 930 {
 931     BDRVRawState *s = bs->opaque;
 932     int fd, open_flags, ret;
 933
 934     posix_aio_init();
 935
 936 #ifdef CONFIG_COCOA
 937     if (strstart(filename, "/dev/cdrom", NULL)) {
 938         kern_return_t kernResult;
 939         io_iterator_t mediaIterator;
 940         char bsdPath[ MAXPATHLEN ];
 941         int fd;
 942
 943         kernResult = FindEjectableCDMedia( &mediaIterator );
 944         kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
 945
 946         if ( bsdPath[ 0 ] != '\0' ) {
 947             strcat(bsdPath,"s0");
 948             /* some CDs don't have a partition 0 */
 949             fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
 950             if (fd < 0) {
 951                 bsdPath[strlen(bsdPath)-1] = '1';
 952             } else {
 953                 close(fd);
 954             }
 955             filename = bsdPath;
 956         }
 957
 958         if ( mediaIterator )
 959             IOObjectRelease( mediaIterator );
 960     }
 961 #endif
 962     open_flags = O_BINARY;
 963     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 964         open_flags |= O_RDWR;
 965     } else {
 966         open_flags |= O_RDONLY;
 967         bs->read_only = 1;
 968     }
 969     /* Use O_DSYNC for write-through caching, no flags for write-back caching,
 970      * and O_DIRECT for no caching. */
 971     if ((flags & BDRV_O_NOCACHE))
 972         open_flags |= O_DIRECT;
 973     else if (!(flags & BDRV_O_CACHE_WB))
 974         open_flags |= O_DSYNC;
 975
 976     s->type = FTYPE_FILE;
 977 #if defined(__linux__)
 978     if (strstart(filename, "/dev/cd", NULL)) {
 979         /* open will not fail even if no CD is inserted */
 980         open_flags |= O_NONBLOCK;
 981         s->type = FTYPE_CD;
 982     } else if (strstart(filename, "/dev/fd", NULL)) {
 983         s->type = FTYPE_FD;
 984         s->fd_open_flags = open_flags;
 985         /* open will not fail even if no floppy is inserted */
 986         open_flags |= O_NONBLOCK;
 987 #ifdef CONFIG_AIO
 988     } else if (strstart(filename, "/dev/sg", NULL)) {
 989         bs->sg = 1;
 990 #endif
 991     }
 992 #endif
 993 #if defined(__FreeBSD__)
 994     if (strstart(filename, "/dev/cd", NULL) ||
 995         strstart(filename, "/dev/acd", NULL)) {
 996         s->type = FTYPE_CD;
 997         s->cd_open_flags = open_flags;
 998     }
 999 #endif
1000     s->fd = -1;
1001     fd = open(filename, open_flags, 0644);
1002     if (fd < 0) {
1003         ret = -errno;
1004         if (ret == -EROFS)
1005             ret = -EACCES;
1006         return ret;
1007     }
1008     s->fd = fd;
1009 #if defined(__FreeBSD__)
1010     /* make sure the door isnt locked at this time */
1011     if (s->type == FTYPE_CD)
1012         ioctl (s->fd, CDIOCALLOW);
1013 #endif
1014 #if defined(__linux__)
1015     /* close fd so that we can reopen it as needed */
1016     if (s->type == FTYPE_FD) {
1017         close(s->fd);
1018         s->fd = -1;
1019         s->fd_media_changed = 1;
1020     }
1021 #endif
1022     return 0;
1023 }
1024
1025 #if defined(__linux__)
1026 /* Note: we do not have a reliable method to detect if the floppy is
1027    present. The current method is to try to open the floppy at every
1028    I/O and to keep it opened during a few hundreds of ms. */
1029 static int fd_open(BlockDriverState *bs)
1030 {
1031     BDRVRawState *s = bs->opaque;
1032     int last_media_present;
1033
1034     if (s->type != FTYPE_FD)
1035         return 0;
1036     last_media_present = (s->fd >= 0);
1037     if (s->fd >= 0 &&
1038         (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1039         close(s->fd);
1040         s->fd = -1;
1041 #ifdef DEBUG_FLOPPY
1042         printf("Floppy closed\n");
1043 #endif
1044     }
1045     if (s->fd < 0) {
1046         if (s->fd_got_error &&
1047             (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1048 #ifdef DEBUG_FLOPPY
1049             printf("No floppy (open delayed)\n");
1050 #endif
1051             return -EIO;
1052         }
1053         s->fd = open(bs->filename, s->fd_open_flags);
1054         if (s->fd < 0) {
1055             s->fd_error_time = qemu_get_clock(rt_clock);
1056             s->fd_got_error = 1;
1057             if (last_media_present)
1058                 s->fd_media_changed = 1;
1059 #ifdef DEBUG_FLOPPY
1060             printf("No floppy\n");
1061 #endif
1062             return -EIO;
1063         }
1064 #ifdef DEBUG_FLOPPY
1065         printf("Floppy opened\n");
1066 #endif
1067     }
1068     if (!last_media_present)
1069         s->fd_media_changed = 1;
1070     s->fd_open_time = qemu_get_clock(rt_clock);
1071     s->fd_got_error = 0;
1072     return 0;
1073 }
1074
1075 static int raw_is_inserted(BlockDriverState *bs)
1076 {
1077     BDRVRawState *s = bs->opaque;
1078     int ret;
1079
1080     switch(s->type) {
1081     case FTYPE_CD:
1082         ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1083         if (ret == CDS_DISC_OK)
1084             return 1;
1085         else
1086             return 0;
1087         break;
1088     case FTYPE_FD:
1089         ret = fd_open(bs);
1090         return (ret >= 0);
1091     default:
1092         return 1;
1093     }
1094 }
1095
1096 /* currently only used by fdc.c, but a CD version would be good too */
1097 static int raw_media_changed(BlockDriverState *bs)
1098 {
1099     BDRVRawState *s = bs->opaque;
1100
1101     switch(s->type) {
1102     case FTYPE_FD:
1103         {
1104             int ret;
1105             /* XXX: we do not have a true media changed indication. It
1106                does not work if the floppy is changed without trying
1107                to read it */
1108             fd_open(bs);
1109             ret = s->fd_media_changed;
1110             s->fd_media_changed = 0;
1111 #ifdef DEBUG_FLOPPY
1112             printf("Floppy changed=%d\n", ret);
1113 #endif
1114             return ret;
1115         }
1116     default:
1117         return -ENOTSUP;
1118     }
1119 }
1120
1121 static int raw_eject(BlockDriverState *bs, int eject_flag)
1122 {
1123     BDRVRawState *s = bs->opaque;
1124
1125     switch(s->type) {
1126     case FTYPE_CD:
1127         if (eject_flag) {
1128             if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
1129                 perror("CDROMEJECT");
1130         } else {
1131             if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
1132                 perror("CDROMEJECT");
1133         }
1134         break;
1135     case FTYPE_FD:
1136         {
1137             int fd;
1138             if (s->fd >= 0) {
1139                 close(s->fd);
1140                 s->fd = -1;
1141             }
1142             fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
1143             if (fd >= 0) {
1144                 if (ioctl(fd, FDEJECT, 0) < 0)
1145                     perror("FDEJECT");
1146                 close(fd);
1147             }
1148         }
1149         break;
1150     default:
1151         return -ENOTSUP;
1152     }
1153     return 0;
1154 }
1155
1156 static int raw_set_locked(BlockDriverState *bs, int locked)
1157 {
1158     BDRVRawState *s = bs->opaque;
1159
1160     switch(s->type) {
1161     case FTYPE_CD:
1162         if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
1163             /* Note: an error can happen if the distribution automatically
1164                mounts the CD-ROM */
1165             //        perror("CDROM_LOCKDOOR");
1166         }
1167         break;
1168     default:
1169         return -ENOTSUP;
1170     }
1171     return 0;
1172 }
1173
1174 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1175 {
1176     BDRVRawState *s = bs->opaque;
1177
1178     return ioctl(s->fd, req, buf);
1179 }
1180
1181 #ifdef CONFIG_AIO
1182 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
1183         unsigned long int req, void *buf,
1184         BlockDriverCompletionFunc *cb, void *opaque)
1185 {
1186     BDRVRawState *s = bs->opaque;
1187     RawAIOCB *acb;
1188
1189     if (fd_open(bs) < 0)
1190         return NULL;
1191
1192     acb = qemu_aio_get(bs, cb, opaque);
1193     if (!acb)
1194         return NULL;
1195     acb->aiocb.aio_fildes = s->fd;
1196     acb->aiocb.ev_signo = SIGUSR2;
1197     acb->aiocb.aio_offset = 0;
1198     acb->aiocb.aio_flags = 0;
1199
1200     acb->next = posix_aio_state->first_aio;
1201     posix_aio_state->first_aio = acb;
1202
1203     acb->aiocb.aio_ioctl_buf = buf;
1204     acb->aiocb.aio_ioctl_cmd = req;
1205     if (qemu_paio_ioctl(&acb->aiocb) < 0) {
1206         raw_aio_remove(acb);
1207         return NULL;
1208     }
1209
1210     return &acb->common;
1211 }
1212 #endif
1213
1214 #elif defined(__FreeBSD__)
1215
1216 static int fd_open(BlockDriverState *bs)
1217 {
1218     BDRVRawState *s = bs->opaque;
1219
1220     /* this is just to ensure s->fd is sane (its called by io ops) */
1221     if (s->fd >= 0)
1222         return 0;
1223     return -EIO;
1224 }
1225
1226 static int cd_open(BlockDriverState *bs)
1227 {
1228 #if defined(__FreeBSD__)
1229     BDRVRawState *s = bs->opaque;
1230     int fd;
1231
1232     switch(s->type) {
1233     case FTYPE_CD:
1234         /* XXX force reread of possibly changed/newly loaded disc,
1235          * FreeBSD seems to not notice sometimes... */
1236         if (s->fd >= 0)
1237             close (s->fd);
1238         fd = open(bs->filename, s->cd_open_flags, 0644);
1239         if (fd < 0) {
1240             s->fd = -1;
1241             return -EIO;
1242         }
1243         s->fd = fd;
1244         /* make sure the door isnt locked at this time */
1245         ioctl (s->fd, CDIOCALLOW);
1246     }
1247 #endif
1248     return 0;
1249 }
1250
1251 static int raw_is_inserted(BlockDriverState *bs)
1252 {
1253     BDRVRawState *s = bs->opaque;
1254
1255     switch(s->type) {
1256     case FTYPE_CD:
1257         return (raw_getlength(bs) > 0);
1258     case FTYPE_FD:
1259         /* XXX handle this */
1260         /* FALLTHRU */
1261     default:
1262         return 1;
1263     }
1264 }
1265
1266 static int raw_media_changed(BlockDriverState *bs)
1267 {
1268     return -ENOTSUP;
1269 }
1270
1271 static int raw_eject(BlockDriverState *bs, int eject_flag)
1272 {
1273     BDRVRawState *s = bs->opaque;
1274
1275     switch(s->type) {
1276     case FTYPE_CD:
1277         if (s->fd < 0)
1278             return -ENOTSUP;
1279         (void) ioctl (s->fd, CDIOCALLOW);
1280         if (eject_flag) {
1281             if (ioctl (s->fd, CDIOCEJECT) < 0)
1282                 perror("CDIOCEJECT");
1283         } else {
1284             if (ioctl (s->fd, CDIOCCLOSE) < 0)
1285                 perror("CDIOCCLOSE");
1286         }
1287         if (cd_open(bs) < 0)
1288             return -ENOTSUP;
1289         break;
1290     case FTYPE_FD:
1291         /* XXX handle this */
1292         /* FALLTHRU */
1293     default:
1294         return -ENOTSUP;
1295     }
1296     return 0;
1297 }
1298
1299 static int raw_set_locked(BlockDriverState *bs, int locked)
1300 {
1301     BDRVRawState *s = bs->opaque;
1302
1303     switch(s->type) {
1304     case FTYPE_CD:
1305         if (s->fd < 0)
1306             return -ENOTSUP;
1307         if (ioctl (s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1308             /* Note: an error can happen if the distribution automatically
1309                mounts the CD-ROM */
1310             //        perror("CDROM_LOCKDOOR");
1311         }
1312         break;
1313     default:
1314         return -ENOTSUP;
1315     }
1316     return 0;
1317 }
1318
1319 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1320 {
1321     return -ENOTSUP;
1322 }
1323 #else /* !linux && !FreeBSD */
1324
1325 static int fd_open(BlockDriverState *bs)
1326 {
1327     return 0;
1328 }
1329
1330 static int raw_is_inserted(BlockDriverState *bs)
1331 {
1332     return 1;
1333 }
1334
1335 static int raw_media_changed(BlockDriverState *bs)
1336 {
1337     return -ENOTSUP;
1338 }
1339
1340 static int raw_eject(BlockDriverState *bs, int eject_flag)
1341 {
1342     return -ENOTSUP;
1343 }
1344
1345 static int raw_set_locked(BlockDriverState *bs, int locked)
1346 {
1347     return -ENOTSUP;
1348 }
1349
1350 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1351 {
1352     return -ENOTSUP;
1353 }
1354
1355 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
1356         unsigned long int req, void *buf,
1357         BlockDriverCompletionFunc *cb, void *opaque)
1358 {
1359     return NULL;
1360 }
1361 #endif /* !linux && !FreeBSD */
1362
1363 #if defined(__linux__) || defined(__FreeBSD__)
1364 static int hdev_create(const char *filename, int64_t total_size,
1365                        const char *backing_file, int flags)
1366 {
1367     int fd;
1368     int ret = 0;
1369     struct stat stat_buf;
1370
1371     if (flags || backing_file)
1372         return -ENOTSUP;
1373
1374     fd = open(filename, O_WRONLY | O_BINARY);
1375     if (fd < 0)
1376         return -EIO;
1377
1378     if (fstat(fd, &stat_buf) < 0)
1379         ret = -EIO;
1380     else if (!S_ISBLK(stat_buf.st_mode))
1381         ret = -EIO;
1382     else if (lseek(fd, 0, SEEK_END) < total_size * 512)
1383         ret = -ENOSPC;
1384
1385     close(fd);
1386     return ret;
1387 }
1388
1389 #else  /* !(linux || freebsd) */
1390
1391 static int hdev_create(const char *filename, int64_t total_size,
1392                        const char *backing_file, int flags)
1393 {
1394     return -ENOTSUP;
1395 }
1396 #endif
1397
1398 BlockDriver bdrv_host_device = {
1399     .format_name        = "host_device",
1400     .instance_size      = sizeof(BDRVRawState),
1401     .bdrv_open          = hdev_open,
1402     .bdrv_close         = raw_close,
1403     .bdrv_create        = hdev_create,
1404     .bdrv_flush         = raw_flush,
1405
1406 #ifdef CONFIG_AIO
1407     .bdrv_aio_readv     = raw_aio_readv,
1408     .bdrv_aio_writev    = raw_aio_writev,
1409     .bdrv_aio_cancel    = raw_aio_cancel,
1410     .aiocb_size         = sizeof(RawAIOCB),
1411 #endif
1412
1413     .bdrv_read          = raw_read,
1414     .bdrv_write         = raw_write,
1415     .bdrv_getlength     = raw_getlength,
1416
1417     /* removable device support */
1418     .bdrv_is_inserted   = raw_is_inserted,
1419     .bdrv_media_changed = raw_media_changed,
1420     .bdrv_eject         = raw_eject,
1421     .bdrv_set_locked    = raw_set_locked,
1422     /* generic scsi device */
1423     .bdrv_ioctl         = raw_ioctl,
1424 #ifdef CONFIG_AIO
1425     .bdrv_aio_ioctl     = raw_aio_ioctl,
1426 #endif
1427 };