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 #ifdef CONFIG_AIO
  29 #include "posix-aio-compat.h"
  30 #endif
  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 #ifdef __FreeBSD__
  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 #define O_DSYNC O_SYNC
  84 #endif
  85
  86 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
  87 #ifndef O_DIRECT
  88 #define O_DIRECT O_DSYNC
  89 #endif
  90
  91 #define FTYPE_FILE   0
  92 #define FTYPE_CD     1
  93 #define FTYPE_FD     2
  94
  95 #define ALIGNED_BUFFER_SIZE (32 * 512)
  96
  97 /* if the FD is not accessed during that time (in ms), we try to
  98    reopen it to see if the disk has been changed */
  99 #define FD_OPEN_TIMEOUT 1000
 100
 101 typedef struct BDRVRawState {
 102     int fd;
 103     int type;
 104     unsigned int lseek_err_cnt;
 105 #if defined(__linux__)
 106     /* linux floppy specific */
 107     int fd_open_flags;
 108     int64_t fd_open_time;
 109     int64_t fd_error_time;
 110     int fd_got_error;
 111     int fd_media_changed;
 112 #endif
 113 #if defined(__FreeBSD__)
 114     int cd_open_flags;
 115 #endif
 116     uint8_t* aligned_buf;
 117 } BDRVRawState;
 118
 119 static int posix_aio_init(void);
 120
 121 static int fd_open(BlockDriverState *bs);
 122
 123 #if defined(__FreeBSD__)
 124 static int cd_open(BlockDriverState *bs);
 125 #endif
 126
 127 static int raw_is_inserted(BlockDriverState *bs);
 128
 129 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 130 {
 131     BDRVRawState *s = bs->opaque;
 132     int fd, open_flags, ret;
 133
 134     posix_aio_init();
 135
 136     s->lseek_err_cnt = 0;
 137
 138     open_flags = O_BINARY;
 139     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 140         open_flags |= O_RDWR;
 141     } else {
 142         open_flags |= O_RDONLY;
 143         bs->read_only = 1;
 144     }
 145     if (flags & BDRV_O_CREAT)
 146         open_flags |= O_CREAT | O_TRUNC;
 147
 148     /* Use O_DSYNC for write-through caching, no flags for write-back caching,
 149      * and O_DIRECT for no caching. */
 150     if ((flags & BDRV_O_NOCACHE))
 151         open_flags |= O_DIRECT;
 152     else if (!(flags & BDRV_O_CACHE_WB))
 153         open_flags |= O_DSYNC;
 154
 155     s->type = FTYPE_FILE;
 156
 157     fd = open(filename, open_flags, 0644);
 158     if (fd < 0) {
 159         ret = -errno;
 160         if (ret == -EROFS)
 161             ret = -EACCES;
 162         return ret;
 163     }
 164     s->fd = fd;
 165     s->aligned_buf = NULL;
 166     if ((flags & BDRV_O_NOCACHE)) {
 167         s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
 168         if (s->aligned_buf == NULL) {
 169             ret = -errno;
 170             close(fd);
 171             return ret;
 172         }
 173     }
 174     return 0;
 175 }
 176
 177 /* XXX: use host sector size if necessary with:
 178 #ifdef DIOCGSECTORSIZE
 179         {
 180             unsigned int sectorsize = 512;
 181             if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
 182                 sectorsize > bufsize)
 183                 bufsize = sectorsize;
 184         }
 185 #endif
 186 #ifdef CONFIG_COCOA
 187         u_int32_t   blockSize = 512;
 188         if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
 189             bufsize = blockSize;
 190         }
 191 #endif
 192 */
 193
 194 /*
 195  * offset and count are in bytes, but must be multiples of 512 for files
 196  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 197  *
 198  * This function may be called without alignment if the caller ensures
 199  * that O_DIRECT is not in effect.
 200  */
 201 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
 202                      uint8_t *buf, int count)
 203 {
 204     BDRVRawState *s = bs->opaque;
 205     int ret;
 206
 207     ret = fd_open(bs);
 208     if (ret < 0)
 209         return ret;
 210
 211     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
 212         ++(s->lseek_err_cnt);
 213         if(s->lseek_err_cnt <= 10) {
 214             DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 215                               "] lseek failed : %d = %s\n",
 216                               s->fd, bs->filename, offset, buf, count,
 217                               bs->total_sectors, errno, strerror(errno));
 218         }
 219         return -1;
 220     }
 221     s->lseek_err_cnt=0;
 222
 223     ret = read(s->fd, buf, count);
 224     if (ret == count)
 225         goto label__raw_read__success;
 226
 227     DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 228                       "] read failed %d : %d = %s\n",
 229                       s->fd, bs->filename, offset, buf, count,
 230                       bs->total_sectors, ret, errno, strerror(errno));
 231
 232     /* Try harder for CDrom. */
 233     if (bs->type == BDRV_TYPE_CDROM) {
 234         lseek(s->fd, offset, SEEK_SET);
 235         ret = read(s->fd, buf, count);
 236         if (ret == count)
 237             goto label__raw_read__success;
 238         lseek(s->fd, offset, SEEK_SET);
 239         ret = read(s->fd, buf, count);
 240         if (ret == count)
 241             goto label__raw_read__success;
 242
 243         DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 244                           "] retry read failed %d : %d = %s\n",
 245                           s->fd, bs->filename, offset, buf, count,
 246                           bs->total_sectors, ret, errno, strerror(errno));
 247     }
 248
 249 label__raw_read__success:
 250
 251     return ret;
 252 }
 253
 254 /*
 255  * offset and count are in bytes, but must be multiples of 512 for files
 256  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 257  *
 258  * This function may be called without alignment if the caller ensures
 259  * that O_DIRECT is not in effect.
 260  */
 261 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
 262                       const uint8_t *buf, int count)
 263 {
 264     BDRVRawState *s = bs->opaque;
 265     int ret;
 266
 267     ret = fd_open(bs);
 268     if (ret < 0)
 269         return -errno;
 270
 271     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
 272         ++(s->lseek_err_cnt);
 273         if(s->lseek_err_cnt) {
 274             DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
 275                               PRId64 "] lseek failed : %d = %s\n",
 276                               s->fd, bs->filename, offset, buf, count,
 277                               bs->total_sectors, errno, strerror(errno));
 278         }
 279         return -EIO;
 280     }
 281     s->lseek_err_cnt = 0;
 282
 283     ret = write(s->fd, buf, count);
 284     if (ret == count)
 285         goto label__raw_write__success;
 286
 287     DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 288                       "] write failed %d : %d = %s\n",
 289                       s->fd, bs->filename, offset, buf, count,
 290                       bs->total_sectors, ret, errno, strerror(errno));
 291
 292 label__raw_write__success:
 293
 294     return  (ret < 0) ? -errno : ret;
 295 }
 296
 297
 298 /*
 299  * offset and count are in bytes and possibly not aligned. For files opened
 300  * with O_DIRECT, necessary alignments are ensured before calling
 301  * raw_pread_aligned to do the actual read.
 302  */
 303 static int raw_pread(BlockDriverState *bs, int64_t offset,
 304                      uint8_t *buf, int count)
 305 {
 306     BDRVRawState *s = bs->opaque;
 307     int size, ret, shift, sum;
 308
 309     sum = 0;
 310
 311     if (s->aligned_buf != NULL)  {
 312
 313         if (offset & 0x1ff) {
 314             /* align offset on a 512 bytes boundary */
 315
 316             shift = offset & 0x1ff;
 317             size = (shift + count + 0x1ff) & ~0x1ff;
 318             if (size > ALIGNED_BUFFER_SIZE)
 319                 size = ALIGNED_BUFFER_SIZE;
 320             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
 321             if (ret < 0)
 322                 return ret;
 323
 324             size = 512 - shift;
 325             if (size > count)
 326                 size = count;
 327             memcpy(buf, s->aligned_buf + shift, size);
 328
 329             buf += size;
 330             offset += size;
 331             count -= size;
 332             sum += size;
 333
 334             if (count == 0)
 335                 return sum;
 336         }
 337         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 338
 339             /* read on aligned buffer */
 340
 341             while (count) {
 342
 343                 size = (count + 0x1ff) & ~0x1ff;
 344                 if (size > ALIGNED_BUFFER_SIZE)
 345                     size = ALIGNED_BUFFER_SIZE;
 346
 347                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
 348                 if (ret < 0)
 349                     return ret;
 350
 351                 size = ret;
 352                 if (size > count)
 353                     size = count;
 354
 355                 memcpy(buf, s->aligned_buf, size);
 356
 357                 buf += size;
 358                 offset += size;
 359                 count -= size;
 360                 sum += size;
 361             }
 362
 363             return sum;
 364         }
 365     }
 366
 367     return raw_pread_aligned(bs, offset, buf, count) + sum;
 368 }
 369
 370 static int raw_read(BlockDriverState *bs, int64_t sector_num,
 371                     uint8_t *buf, int nb_sectors)
 372 {
 373     int ret;
 374
 375     ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
 376     if (ret == (nb_sectors * 512))
 377         ret = 0;
 378     return ret;
 379 }
 380
 381 /*
 382  * offset and count are in bytes and possibly not aligned. For files opened
 383  * with O_DIRECT, necessary alignments are ensured before calling
 384  * raw_pwrite_aligned to do the actual write.
 385  */
 386 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 387                       const uint8_t *buf, int count)
 388 {
 389     BDRVRawState *s = bs->opaque;
 390     int size, ret, shift, sum;
 391
 392     sum = 0;
 393
 394     if (s->aligned_buf != NULL) {
 395
 396         if (offset & 0x1ff) {
 397             /* align offset on a 512 bytes boundary */
 398             shift = offset & 0x1ff;
 399             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
 400             if (ret < 0)
 401                 return ret;
 402
 403             size = 512 - shift;
 404             if (size > count)
 405                 size = count;
 406             memcpy(s->aligned_buf + shift, buf, size);
 407
 408             ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
 409             if (ret < 0)
 410                 return ret;
 411
 412             buf += size;
 413             offset += size;
 414             count -= size;
 415             sum += size;
 416
 417             if (count == 0)
 418                 return sum;
 419         }
 420         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 421
 422             while ((size = (count & ~0x1ff)) != 0) {
 423
 424                 if (size > ALIGNED_BUFFER_SIZE)
 425                     size = ALIGNED_BUFFER_SIZE;
 426
 427                 memcpy(s->aligned_buf, buf, size);
 428
 429                 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
 430                 if (ret < 0)
 431                     return ret;
 432
 433                 buf += ret;
 434                 offset += ret;
 435                 count -= ret;
 436                 sum += ret;
 437             }
 438             /* here, count < 512 because (count & ~0x1ff) == 0 */
 439             if (count) {
 440                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
 441                 if (ret < 0)
 442                     return ret;
 443                  memcpy(s->aligned_buf, buf, count);
 444
 445                  ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
 446                  if (ret < 0)
 447                      return ret;
 448                  if (count < ret)
 449                      ret = count;
 450
 451                  sum += ret;
 452             }
 453             return sum;
 454         }
 455     }
 456     return raw_pwrite_aligned(bs, offset, buf, count) + sum;
 457 }
 458
 459 static int raw_write(BlockDriverState *bs, int64_t sector_num,
 460                      const uint8_t *buf, int nb_sectors)
 461 {
 462     int ret;
 463     ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
 464     if (ret == (nb_sectors * 512))
 465         ret = 0;
 466     return ret;
 467 }
 468
 469 #ifdef CONFIG_AIO
 470 /***********************************************************/
 471 /* Unix AIO using POSIX AIO */
 472
 473 typedef struct RawAIOCB {
 474     BlockDriverAIOCB common;
 475     struct qemu_paiocb aiocb;
 476     struct RawAIOCB *next;
 477     int ret;
 478 } RawAIOCB;
 479
 480 typedef struct PosixAioState
 481 {
 482     int rfd, wfd;
 483     RawAIOCB *first_aio;
 484 } PosixAioState;
 485
 486 static void posix_aio_read(void *opaque)
 487 {
 488     PosixAioState *s = opaque;
 489     RawAIOCB *acb, **pacb;
 490     int ret;
 491     ssize_t len;
 492
 493     /* read all bytes from signal pipe */
 494     for (;;) {
 495         char bytes[16];
 496
 497         len = read(s->rfd, bytes, sizeof(bytes));
 498         if (len == -1 && errno == EINTR)
 499             continue; /* try again */
 500         if (len == sizeof(bytes))
 501             continue; /* more to read */
 502         break;
 503     }
 504
 505     for(;;) {
 506         pacb = &s->first_aio;
 507         for(;;) {
 508             acb = *pacb;
 509             if (!acb)
 510                 goto the_end;
 511             ret = qemu_paio_error(&acb->aiocb);
 512             if (ret == ECANCELED) {
 513                 /* remove the request */
 514                 *pacb = acb->next;
 515                 qemu_aio_release(acb);
 516             } else if (ret != EINPROGRESS) {
 517                 /* end of aio */
 518                 if (ret == 0) {
 519                     ret = qemu_paio_return(&acb->aiocb);
 520                     if (ret == acb->aiocb.aio_nbytes)
 521                         ret = 0;
 522                     else
 523                         ret = -EINVAL;
 524                 } else {
 525                     ret = -ret;
 526                 }
 527                 /* remove the request */
 528                 *pacb = acb->next;
 529                 /* call the callback */
 530                 acb->common.cb(acb->common.opaque, ret);
 531                 qemu_aio_release(acb);
 532                 break;
 533             } else {
 534                 pacb = &acb->next;
 535             }
 536         }
 537     }
 538  the_end: ;
 539 }
 540
 541 static int posix_aio_flush(void *opaque)
 542 {
 543     PosixAioState *s = opaque;
 544     return !!s->first_aio;
 545 }
 546
 547 static PosixAioState *posix_aio_state;
 548
 549 static void aio_signal_handler(int signum)
 550 {
 551     if (posix_aio_state) {
 552         char byte = 0;
 553
 554         write(posix_aio_state->wfd, &byte, sizeof(byte));
 555     }
 556
 557     qemu_service_io();
 558 }
 559
 560 static int posix_aio_init(void)
 561 {
 562     struct sigaction act;
 563     PosixAioState *s;
 564     int fds[2];
 565     struct qemu_paioinit ai;
 566
 567     if (posix_aio_state)
 568         return 0;
 569
 570     s = qemu_malloc(sizeof(PosixAioState));
 571
 572     sigfillset(&act.sa_mask);
 573     act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
 574     act.sa_handler = aio_signal_handler;
 575     sigaction(SIGUSR2, &act, NULL);
 576
 577     s->first_aio = NULL;
 578     if (pipe(fds) == -1) {
 579         fprintf(stderr, "failed to create pipe\n");
 580         return -errno;
 581     }
 582
 583     s->rfd = fds[0];
 584     s->wfd = fds[1];
 585
 586     fcntl(s->rfd, F_SETFL, O_NONBLOCK);
 587     fcntl(s->wfd, F_SETFL, O_NONBLOCK);
 588
 589     qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
 590
 591     memset(&ai, 0, sizeof(ai));
 592     ai.aio_threads = 64;
 593     ai.aio_num = 64;
 594     qemu_paio_init(&ai);
 595
 596     posix_aio_state = s;
 597
 598     return 0;
 599 }
 600
 601 static RawAIOCB *raw_aio_setup(BlockDriverState *bs, int64_t sector_num,
 602         QEMUIOVector *qiov, int nb_sectors,
 603         BlockDriverCompletionFunc *cb, void *opaque)
 604 {
 605     BDRVRawState *s = bs->opaque;
 606     RawAIOCB *acb;
 607
 608     if (fd_open(bs) < 0)
 609         return NULL;
 610
 611     acb = qemu_aio_get(bs, cb, opaque);
 612     if (!acb)
 613         return NULL;
 614     acb->aiocb.aio_fildes = s->fd;
 615     acb->aiocb.ev_signo = SIGUSR2;
 616     acb->aiocb.aio_iov = qiov->iov;
 617     acb->aiocb.aio_niov = qiov->niov;
 618     acb->aiocb.aio_nbytes = nb_sectors * 512;
 619     acb->aiocb.aio_offset = sector_num * 512;
 620     acb->aiocb.aio_flags = 0;
 621
 622     /*
 623      * If O_DIRECT is used the buffer needs to be aligned on a sector
 624      * boundary. Tell the low level code to ensure that in case it's
 625      * not done yet.
 626      */
 627     if (s->aligned_buf)
 628         acb->aiocb.aio_flags |= QEMU_AIO_SECTOR_ALIGNED;
 629
 630     acb->next = posix_aio_state->first_aio;
 631     posix_aio_state->first_aio = acb;
 632     return acb;
 633 }
 634
 635 static void raw_aio_remove(RawAIOCB *acb)
 636 {
 637     RawAIOCB **pacb;
 638
 639     /* remove the callback from the queue */
 640     pacb = &posix_aio_state->first_aio;
 641     for(;;) {
 642         if (*pacb == NULL) {
 643             fprintf(stderr, "raw_aio_remove: aio request not found!\n");
 644             break;
 645         } else if (*pacb == acb) {
 646             *pacb = acb->next;
 647             qemu_aio_release(acb);
 648             break;
 649         }
 650         pacb = &(*pacb)->next;
 651     }
 652 }
 653
 654 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
 655         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 656         BlockDriverCompletionFunc *cb, void *opaque)
 657 {
 658     RawAIOCB *acb;
 659
 660     acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
 661     if (!acb)
 662         return NULL;
 663     if (qemu_paio_read(&acb->aiocb) < 0) {
 664         raw_aio_remove(acb);
 665         return NULL;
 666     }
 667     return &acb->common;
 668 }
 669
 670 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
 671         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 672         BlockDriverCompletionFunc *cb, void *opaque)
 673 {
 674     RawAIOCB *acb;
 675
 676     acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
 677     if (!acb)
 678         return NULL;
 679     if (qemu_paio_write(&acb->aiocb) < 0) {
 680         raw_aio_remove(acb);
 681         return NULL;
 682     }
 683     return &acb->common;
 684 }
 685
 686 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
 687 {
 688     int ret;
 689     RawAIOCB *acb = (RawAIOCB *)blockacb;
 690
 691     ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
 692     if (ret == QEMU_PAIO_NOTCANCELED) {
 693         /* fail safe: if the aio could not be canceled, we wait for
 694            it */
 695         while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
 696     }
 697
 698     raw_aio_remove(acb);
 699 }
 700 #else /* CONFIG_AIO */
 701 static int posix_aio_init(void)
 702 {
 703     return 0;
 704 }
 705 #endif /* CONFIG_AIO */
 706
 707
 708 static void raw_close(BlockDriverState *bs)
 709 {
 710     BDRVRawState *s = bs->opaque;
 711     if (s->fd >= 0) {
 712         close(s->fd);
 713         s->fd = -1;
 714         if (s->aligned_buf != NULL)
 715             qemu_free(s->aligned_buf);
 716     }
 717 }
 718
 719 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 720 {
 721     BDRVRawState *s = bs->opaque;
 722     if (s->type != FTYPE_FILE)
 723         return -ENOTSUP;
 724     if (ftruncate(s->fd, offset) < 0)
 725         return -errno;
 726     return 0;
 727 }
 728
 729 #ifdef __OpenBSD__
 730 static int64_t raw_getlength(BlockDriverState *bs)
 731 {
 732     BDRVRawState *s = bs->opaque;
 733     int fd = s->fd;
 734     struct stat st;
 735
 736     if (fstat(fd, &st))
 737         return -1;
 738     if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
 739         struct disklabel dl;
 740
 741         if (ioctl(fd, DIOCGDINFO, &dl))
 742             return -1;
 743         return (uint64_t)dl.d_secsize *
 744             dl.d_partitions[DISKPART(st.st_rdev)].p_size;
 745     } else
 746         return st.st_size;
 747 }
 748 #else /* !__OpenBSD__ */
 749 static int64_t  raw_getlength(BlockDriverState *bs)
 750 {
 751     BDRVRawState *s = bs->opaque;
 752     int fd = s->fd;
 753     int64_t size;
 754 #ifdef HOST_BSD
 755     struct stat sb;
 756 #ifdef __FreeBSD__
 757     int reopened = 0;
 758 #endif
 759 #endif
 760 #ifdef __sun__
 761     struct dk_minfo minfo;
 762     int rv;
 763 #endif
 764     int ret;
 765
 766     ret = fd_open(bs);
 767     if (ret < 0)
 768         return ret;
 769
 770 #ifdef HOST_BSD
 771 #ifdef __FreeBSD__
 772 again:
 773 #endif
 774     if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
 775 #ifdef DIOCGMEDIASIZE
 776         if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
 777 #elif defined(DIOCGPART)
 778         {
 779                 struct partinfo pi;
 780                 if (ioctl(fd, DIOCGPART, &pi) == 0)
 781                         size = pi.media_size;
 782                 else
 783                         size = 0;
 784         }
 785         if (size == 0)
 786 #endif
 787 #ifdef CONFIG_COCOA
 788         size = LONG_LONG_MAX;
 789 #else
 790         size = lseek(fd, 0LL, SEEK_END);
 791 #endif
 792 #ifdef __FreeBSD__
 793         switch(s->type) {
 794         case FTYPE_CD:
 795             /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
 796             if (size == 2048LL * (unsigned)-1)
 797                 size = 0;
 798             /* XXX no disc?  maybe we need to reopen... */
 799             if (size <= 0 && !reopened && cd_open(bs) >= 0) {
 800                 reopened = 1;
 801                 goto again;
 802             }
 803         }
 804 #endif
 805     } else
 806 #endif
 807 #ifdef __sun__
 808     /*
 809      * use the DKIOCGMEDIAINFO ioctl to read the size.
 810      */
 811     rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
 812     if ( rv != -1 ) {
 813         size = minfo.dki_lbsize * minfo.dki_capacity;
 814     } else /* there are reports that lseek on some devices
 815               fails, but irc discussion said that contingency
 816               on contingency was overkill */
 817 #endif
 818     {
 819         size = lseek(fd, 0, SEEK_END);
 820     }
 821     return size;
 822 }
 823 #endif
 824
 825 static int raw_create(const char *filename, int64_t total_size,
 826                       const char *backing_file, int flags)
 827 {
 828     int fd;
 829
 830     if (flags || backing_file)
 831         return -ENOTSUP;
 832
 833     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 834               0644);
 835     if (fd < 0)
 836         return -EIO;
 837     ftruncate(fd, total_size * 512);
 838     close(fd);
 839     return 0;
 840 }
 841
 842 static void raw_flush(BlockDriverState *bs)
 843 {
 844     BDRVRawState *s = bs->opaque;
 845     fsync(s->fd);
 846 }
 847
 848 BlockDriver bdrv_raw = {
 849     .format_name = "raw",
 850     .instance_size = sizeof(BDRVRawState),
 851     .bdrv_probe = NULL, /* no probe for protocols */
 852     .bdrv_open = raw_open,
 853     .bdrv_read = raw_read,
 854     .bdrv_write = raw_write,
 855     .bdrv_close = raw_close,
 856     .bdrv_create = raw_create,
 857     .bdrv_flush = raw_flush,
 858
 859 #ifdef CONFIG_AIO
 860     .bdrv_aio_readv = raw_aio_readv,
 861     .bdrv_aio_writev = raw_aio_writev,
 862     .bdrv_aio_cancel = raw_aio_cancel,
 863     .aiocb_size = sizeof(RawAIOCB),
 864 #endif
 865
 866     .bdrv_truncate = raw_truncate,
 867     .bdrv_getlength = raw_getlength,
 868 };
 869
 870 /***********************************************/
 871 /* host device */
 872
 873 #ifdef CONFIG_COCOA
 874 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
 875 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
 876
 877 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
 878 {
 879     kern_return_t       kernResult;
 880     mach_port_t     masterPort;
 881     CFMutableDictionaryRef  classesToMatch;
 882
 883     kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
 884     if ( KERN_SUCCESS != kernResult ) {
 885         printf( "IOMasterPort returned %d\n", kernResult );
 886     }
 887
 888     classesToMatch = IOServiceMatching( kIOCDMediaClass );
 889     if ( classesToMatch == NULL ) {
 890         printf( "IOServiceMatching returned a NULL dictionary.\n" );
 891     } else {
 892     CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
 893     }
 894     kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
 895     if ( KERN_SUCCESS != kernResult )
 896     {
 897         printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
 898     }
 899
 900     return kernResult;
 901 }
 902
 903 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
 904 {
 905     io_object_t     nextMedia;
 906     kern_return_t   kernResult = KERN_FAILURE;
 907     *bsdPath = '\0';
 908     nextMedia = IOIteratorNext( mediaIterator );
 909     if ( nextMedia )
 910     {
 911         CFTypeRef   bsdPathAsCFString;
 912     bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
 913         if ( bsdPathAsCFString ) {
 914             size_t devPathLength;
 915             strcpy( bsdPath, _PATH_DEV );
 916             strcat( bsdPath, "r" );
 917             devPathLength = strlen( bsdPath );
 918             if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
 919                 kernResult = KERN_SUCCESS;
 920             }
 921             CFRelease( bsdPathAsCFString );
 922         }
 923         IOObjectRelease( nextMedia );
 924     }
 925
 926     return kernResult;
 927 }
 928
 929 #endif
 930
 931 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
 932 {
 933     BDRVRawState *s = bs->opaque;
 934     int fd, open_flags, ret;
 935
 936     posix_aio_init();
 937
 938 #ifdef CONFIG_COCOA
 939     if (strstart(filename, "/dev/cdrom", NULL)) {
 940         kern_return_t kernResult;
 941         io_iterator_t mediaIterator;
 942         char bsdPath[ MAXPATHLEN ];
 943         int fd;
 944
 945         kernResult = FindEjectableCDMedia( &mediaIterator );
 946         kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
 947
 948         if ( bsdPath[ 0 ] != '\0' ) {
 949             strcat(bsdPath,"s0");
 950             /* some CDs don't have a partition 0 */
 951             fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
 952             if (fd < 0) {
 953                 bsdPath[strlen(bsdPath)-1] = '1';
 954             } else {
 955                 close(fd);
 956             }
 957             filename = bsdPath;
 958         }
 959
 960         if ( mediaIterator )
 961             IOObjectRelease( mediaIterator );
 962     }
 963 #endif
 964     open_flags = O_BINARY;
 965     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 966         open_flags |= O_RDWR;
 967     } else {
 968         open_flags |= O_RDONLY;
 969         bs->read_only = 1;
 970     }
 971     /* Use O_DSYNC for write-through caching, no flags for write-back caching,
 972      * and O_DIRECT for no caching. */
 973     if ((flags & BDRV_O_NOCACHE))
 974         open_flags |= O_DIRECT;
 975     else if (!(flags & BDRV_O_CACHE_WB))
 976         open_flags |= O_DSYNC;
 977
 978     s->type = FTYPE_FILE;
 979 #if defined(__linux__)
 980     if (strstart(filename, "/dev/cd", NULL)) {
 981         /* open will not fail even if no CD is inserted */
 982         open_flags |= O_NONBLOCK;
 983         s->type = FTYPE_CD;
 984     } else if (strstart(filename, "/dev/fd", NULL)) {
 985         s->type = FTYPE_FD;
 986         s->fd_open_flags = open_flags;
 987         /* open will not fail even if no floppy is inserted */
 988         open_flags |= O_NONBLOCK;
 989 #ifdef CONFIG_AIO
 990     } else if (strstart(filename, "/dev/sg", NULL)) {
 991         bs->sg = 1;
 992 #endif
 993     }
 994 #endif
 995 #if defined(__FreeBSD__)
 996     if (strstart(filename, "/dev/cd", NULL) ||
 997         strstart(filename, "/dev/acd", NULL)) {
 998         s->type = FTYPE_CD;
 999         s->cd_open_flags = open_flags;
1000     }
1001 #endif
1002     s->fd = -1;
1003     fd = open(filename, open_flags, 0644);
1004     if (fd < 0) {
1005         ret = -errno;
1006         if (ret == -EROFS)
1007             ret = -EACCES;
1008         return ret;
1009     }
1010     s->fd = fd;
1011 #if defined(__FreeBSD__)
1012     /* make sure the door isnt locked at this time */
1013     if (s->type == FTYPE_CD)
1014         ioctl (s->fd, CDIOCALLOW);
1015 #endif
1016 #if defined(__linux__)
1017     /* close fd so that we can reopen it as needed */
1018     if (s->type == FTYPE_FD) {
1019         close(s->fd);
1020         s->fd = -1;
1021         s->fd_media_changed = 1;
1022     }
1023 #endif
1024     return 0;
1025 }
1026
1027 #if defined(__linux__)
1028 /* Note: we do not have a reliable method to detect if the floppy is
1029    present. The current method is to try to open the floppy at every
1030    I/O and to keep it opened during a few hundreds of ms. */
1031 static int fd_open(BlockDriverState *bs)
1032 {
1033     BDRVRawState *s = bs->opaque;
1034     int last_media_present;
1035
1036     if (s->type != FTYPE_FD)
1037         return 0;
1038     last_media_present = (s->fd >= 0);
1039     if (s->fd >= 0 &&
1040         (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1041         close(s->fd);
1042         s->fd = -1;
1043 #ifdef DEBUG_FLOPPY
1044         printf("Floppy closed\n");
1045 #endif
1046     }
1047     if (s->fd < 0) {
1048         if (s->fd_got_error &&
1049             (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1050 #ifdef DEBUG_FLOPPY
1051             printf("No floppy (open delayed)\n");
1052 #endif
1053             return -EIO;
1054         }
1055         s->fd = open(bs->filename, s->fd_open_flags);
1056         if (s->fd < 0) {
1057             s->fd_error_time = qemu_get_clock(rt_clock);
1058             s->fd_got_error = 1;
1059             if (last_media_present)
1060                 s->fd_media_changed = 1;
1061 #ifdef DEBUG_FLOPPY
1062             printf("No floppy\n");
1063 #endif
1064             return -EIO;
1065         }
1066 #ifdef DEBUG_FLOPPY
1067         printf("Floppy opened\n");
1068 #endif
1069     }
1070     if (!last_media_present)
1071         s->fd_media_changed = 1;
1072     s->fd_open_time = qemu_get_clock(rt_clock);
1073     s->fd_got_error = 0;
1074     return 0;
1075 }
1076
1077 static int raw_is_inserted(BlockDriverState *bs)
1078 {
1079     BDRVRawState *s = bs->opaque;
1080     int ret;
1081
1082     switch(s->type) {
1083     case FTYPE_CD:
1084         ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1085         if (ret == CDS_DISC_OK)
1086             return 1;
1087         else
1088             return 0;
1089         break;
1090     case FTYPE_FD:
1091         ret = fd_open(bs);
1092         return (ret >= 0);
1093     default:
1094         return 1;
1095     }
1096 }
1097
1098 /* currently only used by fdc.c, but a CD version would be good too */
1099 static int raw_media_changed(BlockDriverState *bs)
1100 {
1101     BDRVRawState *s = bs->opaque;
1102
1103     switch(s->type) {
1104     case FTYPE_FD:
1105         {
1106             int ret;
1107             /* XXX: we do not have a true media changed indication. It
1108                does not work if the floppy is changed without trying
1109                to read it */
1110             fd_open(bs);
1111             ret = s->fd_media_changed;
1112             s->fd_media_changed = 0;
1113 #ifdef DEBUG_FLOPPY
1114             printf("Floppy changed=%d\n", ret);
1115 #endif
1116             return ret;
1117         }
1118     default:
1119         return -ENOTSUP;
1120     }
1121 }
1122
1123 static int raw_eject(BlockDriverState *bs, int eject_flag)
1124 {
1125     BDRVRawState *s = bs->opaque;
1126
1127     switch(s->type) {
1128     case FTYPE_CD:
1129         if (eject_flag) {
1130             if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
1131                 perror("CDROMEJECT");
1132         } else {
1133             if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
1134                 perror("CDROMEJECT");
1135         }
1136         break;
1137     case FTYPE_FD:
1138         {
1139             int fd;
1140             if (s->fd >= 0) {
1141                 close(s->fd);
1142                 s->fd = -1;
1143             }
1144             fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
1145             if (fd >= 0) {
1146                 if (ioctl(fd, FDEJECT, 0) < 0)
1147                     perror("FDEJECT");
1148                 close(fd);
1149             }
1150         }
1151         break;
1152     default:
1153         return -ENOTSUP;
1154     }
1155     return 0;
1156 }
1157
1158 static int raw_set_locked(BlockDriverState *bs, int locked)
1159 {
1160     BDRVRawState *s = bs->opaque;
1161
1162     switch(s->type) {
1163     case FTYPE_CD:
1164         if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
1165             /* Note: an error can happen if the distribution automatically
1166                mounts the CD-ROM */
1167             //        perror("CDROM_LOCKDOOR");
1168         }
1169         break;
1170     default:
1171         return -ENOTSUP;
1172     }
1173     return 0;
1174 }
1175
1176 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1177 {
1178     BDRVRawState *s = bs->opaque;
1179
1180     return ioctl(s->fd, req, buf);
1181 }
1182
1183 #ifdef CONFIG_AIO
1184 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
1185         unsigned long int req, void *buf,
1186         BlockDriverCompletionFunc *cb, void *opaque)
1187 {
1188     BDRVRawState *s = bs->opaque;
1189     RawAIOCB *acb;
1190
1191     if (fd_open(bs) < 0)
1192         return NULL;
1193
1194     acb = qemu_aio_get(bs, cb, opaque);
1195     if (!acb)
1196         return NULL;
1197     acb->aiocb.aio_fildes = s->fd;
1198     acb->aiocb.ev_signo = SIGUSR2;
1199     acb->aiocb.aio_offset = 0;
1200     acb->aiocb.aio_flags = 0;
1201
1202     acb->next = posix_aio_state->first_aio;
1203     posix_aio_state->first_aio = acb;
1204
1205     acb->aiocb.aio_ioctl_buf = buf;
1206     acb->aiocb.aio_ioctl_cmd = req;
1207     if (qemu_paio_ioctl(&acb->aiocb) < 0) {
1208         raw_aio_remove(acb);
1209         return NULL;
1210     }
1211
1212     return &acb->common;
1213 }
1214 #endif
1215
1216 #elif defined(__FreeBSD__)
1217
1218 static int fd_open(BlockDriverState *bs)
1219 {
1220     BDRVRawState *s = bs->opaque;
1221
1222     /* this is just to ensure s->fd is sane (its called by io ops) */
1223     if (s->fd >= 0)
1224         return 0;
1225     return -EIO;
1226 }
1227
1228 static int cd_open(BlockDriverState *bs)
1229 {
1230 #if defined(__FreeBSD__)
1231     BDRVRawState *s = bs->opaque;
1232     int fd;
1233
1234     switch(s->type) {
1235     case FTYPE_CD:
1236         /* XXX force reread of possibly changed/newly loaded disc,
1237          * FreeBSD seems to not notice sometimes... */
1238         if (s->fd >= 0)
1239             close (s->fd);
1240         fd = open(bs->filename, s->cd_open_flags, 0644);
1241         if (fd < 0) {
1242             s->fd = -1;
1243             return -EIO;
1244         }
1245         s->fd = fd;
1246         /* make sure the door isnt locked at this time */
1247         ioctl (s->fd, CDIOCALLOW);
1248     }
1249 #endif
1250     return 0;
1251 }
1252
1253 static int raw_is_inserted(BlockDriverState *bs)
1254 {
1255     BDRVRawState *s = bs->opaque;
1256
1257     switch(s->type) {
1258     case FTYPE_CD:
1259         return (raw_getlength(bs) > 0);
1260     case FTYPE_FD:
1261         /* XXX handle this */
1262         /* FALLTHRU */
1263     default:
1264         return 1;
1265     }
1266 }
1267
1268 static int raw_media_changed(BlockDriverState *bs)
1269 {
1270     return -ENOTSUP;
1271 }
1272
1273 static int raw_eject(BlockDriverState *bs, int eject_flag)
1274 {
1275     BDRVRawState *s = bs->opaque;
1276
1277     switch(s->type) {
1278     case FTYPE_CD:
1279         if (s->fd < 0)
1280             return -ENOTSUP;
1281         (void) ioctl (s->fd, CDIOCALLOW);
1282         if (eject_flag) {
1283             if (ioctl (s->fd, CDIOCEJECT) < 0)
1284                 perror("CDIOCEJECT");
1285         } else {
1286             if (ioctl (s->fd, CDIOCCLOSE) < 0)
1287                 perror("CDIOCCLOSE");
1288         }
1289         if (cd_open(bs) < 0)
1290             return -ENOTSUP;
1291         break;
1292     case FTYPE_FD:
1293         /* XXX handle this */
1294         /* FALLTHRU */
1295     default:
1296         return -ENOTSUP;
1297     }
1298     return 0;
1299 }
1300
1301 static int raw_set_locked(BlockDriverState *bs, int locked)
1302 {
1303     BDRVRawState *s = bs->opaque;
1304
1305     switch(s->type) {
1306     case FTYPE_CD:
1307         if (s->fd < 0)
1308             return -ENOTSUP;
1309         if (ioctl (s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1310             /* Note: an error can happen if the distribution automatically
1311                mounts the CD-ROM */
1312             //        perror("CDROM_LOCKDOOR");
1313         }
1314         break;
1315     default:
1316         return -ENOTSUP;
1317     }
1318     return 0;
1319 }
1320
1321 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1322 {
1323     return -ENOTSUP;
1324 }
1325 #else /* !linux && !FreeBSD */
1326
1327 static int fd_open(BlockDriverState *bs)
1328 {
1329     return 0;
1330 }
1331
1332 static int raw_is_inserted(BlockDriverState *bs)
1333 {
1334     return 1;
1335 }
1336
1337 static int raw_media_changed(BlockDriverState *bs)
1338 {
1339     return -ENOTSUP;
1340 }
1341
1342 static int raw_eject(BlockDriverState *bs, int eject_flag)
1343 {
1344     return -ENOTSUP;
1345 }
1346
1347 static int raw_set_locked(BlockDriverState *bs, int locked)
1348 {
1349     return -ENOTSUP;
1350 }
1351
1352 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1353 {
1354     return -ENOTSUP;
1355 }
1356
1357 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
1358         unsigned long int req, void *buf,
1359         BlockDriverCompletionFunc *cb, void *opaque)
1360 {
1361     return NULL;
1362 }
1363 #endif /* !linux && !FreeBSD */
1364
1365 #if defined(__linux__) || defined(__FreeBSD__)
1366 static int hdev_create(const char *filename, int64_t total_size,
1367                        const char *backing_file, int flags)
1368 {
1369     int fd;
1370     int ret = 0;
1371     struct stat stat_buf;
1372
1373     if (flags || backing_file)
1374         return -ENOTSUP;
1375
1376     fd = open(filename, O_WRONLY | O_BINARY);
1377     if (fd < 0)
1378         return -EIO;
1379
1380     if (fstat(fd, &stat_buf) < 0)
1381         ret = -EIO;
1382     else if (!S_ISBLK(stat_buf.st_mode))
1383         ret = -EIO;
1384     else if (lseek(fd, 0, SEEK_END) < total_size * 512)
1385         ret = -ENOSPC;
1386
1387     close(fd);
1388     return ret;
1389 }
1390
1391 #else  /* !(linux || freebsd) */
1392
1393 static int hdev_create(const char *filename, int64_t total_size,
1394                        const char *backing_file, int flags)
1395 {
1396     return -ENOTSUP;
1397 }
1398 #endif
1399
1400 BlockDriver bdrv_host_device = {
1401     .format_name        = "host_device",
1402     .instance_size      = sizeof(BDRVRawState),
1403     .bdrv_open          = hdev_open,
1404     .bdrv_close         = raw_close,
1405     .bdrv_create        = hdev_create,
1406     .bdrv_flush         = raw_flush,
1407
1408 #ifdef CONFIG_AIO
1409     .bdrv_aio_readv     = raw_aio_readv,
1410     .bdrv_aio_writev    = raw_aio_writev,
1411     .bdrv_aio_cancel    = raw_aio_cancel,
1412     .aiocb_size         = sizeof(RawAIOCB),
1413 #endif
1414
1415     .bdrv_read          = raw_read,
1416     .bdrv_write         = raw_write,
1417     .bdrv_getlength     = raw_getlength,
1418
1419     /* removable device support */
1420     .bdrv_is_inserted   = raw_is_inserted,
1421     .bdrv_media_changed = raw_media_changed,
1422     .bdrv_eject         = raw_eject,
1423     .bdrv_set_locked    = raw_set_locked,
1424     /* generic scsi device */
1425     .bdrv_ioctl         = raw_ioctl,
1426 #ifdef CONFIG_AIO
1427     .bdrv_aio_ioctl     = raw_aio_ioctl,
1428 #endif
1429 };