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 "module.h"
  29 #ifdef CONFIG_AIO
  30 #include "posix-aio-compat.h"
  31 #endif
  32
  33 #ifdef CONFIG_COCOA
  34 #include <paths.h>
  35 #include <sys/param.h>
  36 #include <IOKit/IOKitLib.h>
  37 #include <IOKit/IOBSD.h>
  38 #include <IOKit/storage/IOMediaBSDClient.h>
  39 #include <IOKit/storage/IOMedia.h>
  40 #include <IOKit/storage/IOCDMedia.h>
  41 //#include <IOKit/storage/IOCDTypes.h>
  42 #include <CoreFoundation/CoreFoundation.h>
  43 #endif
  44
  45 #ifdef __sun__
  46 #define _POSIX_PTHREAD_SEMANTICS 1
  47 #include <signal.h>
  48 #include <sys/dkio.h>
  49 #endif
  50 #ifdef __linux__
  51 #include <sys/ioctl.h>
  52 #include <linux/cdrom.h>
  53 #include <linux/fd.h>
  54 #endif
  55 #ifdef __FreeBSD__
  56 #include <signal.h>
  57 #include <sys/disk.h>
  58 #include <sys/cdio.h>
  59 #endif
  60
  61 #ifdef __OpenBSD__
  62 #include <sys/ioctl.h>
  63 #include <sys/disklabel.h>
  64 #include <sys/dkio.h>
  65 #endif
  66
  67 #ifdef __DragonFly__
  68 #include <sys/ioctl.h>
  69 #include <sys/diskslice.h>
  70 #endif
  71
  72 //#define DEBUG_FLOPPY
  73
  74 //#define DEBUG_BLOCK
  75 #if defined(DEBUG_BLOCK)
  76 #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \
  77     { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0)
  78 #else
  79 #define DEBUG_BLOCK_PRINT(formatCstr, ...)
  80 #endif
  81
  82 /* OS X does not have O_DSYNC */
  83 #ifndef O_DSYNC
  84 #define O_DSYNC O_SYNC
  85 #endif
  86
  87 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
  88 #ifndef O_DIRECT
  89 #define O_DIRECT O_DSYNC
  90 #endif
  91
  92 #define FTYPE_FILE   0
  93 #define FTYPE_CD     1
  94 #define FTYPE_FD     2
  95
  96 #define ALIGNED_BUFFER_SIZE (32 * 512)
  97
  98 /* if the FD is not accessed during that time (in ms), we try to
  99    reopen it to see if the disk has been changed */
 100 #define FD_OPEN_TIMEOUT 1000
 101
 102 typedef struct BDRVRawState {
 103     int fd;
 104     int type;
 105     unsigned int lseek_err_cnt;
 106 #if defined(__linux__)
 107     /* linux floppy specific */
 108     int fd_open_flags;
 109     int64_t fd_open_time;
 110     int64_t fd_error_time;
 111     int fd_got_error;
 112     int fd_media_changed;
 113 #endif
 114 #if defined(__FreeBSD__)
 115     int cd_open_flags;
 116 #endif
 117     uint8_t* aligned_buf;
 118 } BDRVRawState;
 119
 120 static int posix_aio_init(void);
 121
 122 static int fd_open(BlockDriverState *bs);
 123
 124 #if defined(__FreeBSD__)
 125 static int cd_open(BlockDriverState *bs);
 126 #endif
 127
 128 static int raw_is_inserted(BlockDriverState *bs);
 129
 130 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 131 {
 132     BDRVRawState *s = bs->opaque;
 133     int fd, open_flags, ret;
 134
 135     posix_aio_init();
 136
 137     s->lseek_err_cnt = 0;
 138
 139     open_flags = O_BINARY;
 140     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 141         open_flags |= O_RDWR;
 142     } else {
 143         open_flags |= O_RDONLY;
 144         bs->read_only = 1;
 145     }
 146     if (flags & BDRV_O_CREAT)
 147         open_flags |= O_CREAT | O_TRUNC;
 148
 149     /* Use O_DSYNC for write-through caching, no flags for write-back caching,
 150      * and O_DIRECT for no caching. */
 151     if ((flags & BDRV_O_NOCACHE))
 152         open_flags |= O_DIRECT;
 153     else if (!(flags & BDRV_O_CACHE_WB))
 154         open_flags |= O_DSYNC;
 155
 156     s->type = FTYPE_FILE;
 157
 158     fd = open(filename, open_flags, 0644);
 159     if (fd < 0) {
 160         ret = -errno;
 161         if (ret == -EROFS)
 162             ret = -EACCES;
 163         return ret;
 164     }
 165     s->fd = fd;
 166     s->aligned_buf = NULL;
 167     if ((flags & BDRV_O_NOCACHE)) {
 168         s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
 169         if (s->aligned_buf == NULL) {
 170             ret = -errno;
 171             close(fd);
 172             return ret;
 173         }
 174     }
 175     return 0;
 176 }
 177
 178 /* XXX: use host sector size if necessary with:
 179 #ifdef DIOCGSECTORSIZE
 180         {
 181             unsigned int sectorsize = 512;
 182             if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
 183                 sectorsize > bufsize)
 184                 bufsize = sectorsize;
 185         }
 186 #endif
 187 #ifdef CONFIG_COCOA
 188         u_int32_t   blockSize = 512;
 189         if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
 190             bufsize = blockSize;
 191         }
 192 #endif
 193 */
 194
 195 /*
 196  * offset and count are in bytes, but must be multiples of 512 for files
 197  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 198  *
 199  * This function may be called without alignment if the caller ensures
 200  * that O_DIRECT is not in effect.
 201  */
 202 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
 203                      uint8_t *buf, int count)
 204 {
 205     BDRVRawState *s = bs->opaque;
 206     int ret;
 207
 208     ret = fd_open(bs);
 209     if (ret < 0)
 210         return ret;
 211
 212     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
 213         ++(s->lseek_err_cnt);
 214         if(s->lseek_err_cnt <= 10) {
 215             DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 216                               "] lseek failed : %d = %s\n",
 217                               s->fd, bs->filename, offset, buf, count,
 218                               bs->total_sectors, errno, strerror(errno));
 219         }
 220         return -1;
 221     }
 222     s->lseek_err_cnt=0;
 223
 224     ret = read(s->fd, buf, count);
 225     if (ret == count)
 226         goto label__raw_read__success;
 227
 228     DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 229                       "] read failed %d : %d = %s\n",
 230                       s->fd, bs->filename, offset, buf, count,
 231                       bs->total_sectors, ret, errno, strerror(errno));
 232
 233     /* Try harder for CDrom. */
 234     if (bs->type == BDRV_TYPE_CDROM) {
 235         lseek(s->fd, offset, SEEK_SET);
 236         ret = read(s->fd, buf, count);
 237         if (ret == count)
 238             goto label__raw_read__success;
 239         lseek(s->fd, offset, SEEK_SET);
 240         ret = read(s->fd, buf, count);
 241         if (ret == count)
 242             goto label__raw_read__success;
 243
 244         DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 245                           "] retry read failed %d : %d = %s\n",
 246                           s->fd, bs->filename, offset, buf, count,
 247                           bs->total_sectors, ret, errno, strerror(errno));
 248     }
 249
 250 label__raw_read__success:
 251
 252     return  (ret < 0) ? -errno : ret;
 253 }
 254
 255 /*
 256  * offset and count are in bytes, but must be multiples of 512 for files
 257  * opened with O_DIRECT. buf must be aligned to 512 bytes then.
 258  *
 259  * This function may be called without alignment if the caller ensures
 260  * that O_DIRECT is not in effect.
 261  */
 262 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
 263                       const uint8_t *buf, int count)
 264 {
 265     BDRVRawState *s = bs->opaque;
 266     int ret;
 267
 268     ret = fd_open(bs);
 269     if (ret < 0)
 270         return -errno;
 271
 272     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
 273         ++(s->lseek_err_cnt);
 274         if(s->lseek_err_cnt) {
 275             DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
 276                               PRId64 "] lseek failed : %d = %s\n",
 277                               s->fd, bs->filename, offset, buf, count,
 278                               bs->total_sectors, errno, strerror(errno));
 279         }
 280         return -EIO;
 281     }
 282     s->lseek_err_cnt = 0;
 283
 284     ret = write(s->fd, buf, count);
 285     if (ret == count)
 286         goto label__raw_write__success;
 287
 288     DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
 289                       "] write failed %d : %d = %s\n",
 290                       s->fd, bs->filename, offset, buf, count,
 291                       bs->total_sectors, ret, errno, strerror(errno));
 292
 293 label__raw_write__success:
 294
 295     return  (ret < 0) ? -errno : ret;
 296 }
 297
 298
 299 /*
 300  * offset and count are in bytes and possibly not aligned. For files opened
 301  * with O_DIRECT, necessary alignments are ensured before calling
 302  * raw_pread_aligned to do the actual read.
 303  */
 304 static int raw_pread(BlockDriverState *bs, int64_t offset,
 305                      uint8_t *buf, int count)
 306 {
 307     BDRVRawState *s = bs->opaque;
 308     int size, ret, shift, sum;
 309
 310     sum = 0;
 311
 312     if (s->aligned_buf != NULL)  {
 313
 314         if (offset & 0x1ff) {
 315             /* align offset on a 512 bytes boundary */
 316
 317             shift = offset & 0x1ff;
 318             size = (shift + count + 0x1ff) & ~0x1ff;
 319             if (size > ALIGNED_BUFFER_SIZE)
 320                 size = ALIGNED_BUFFER_SIZE;
 321             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
 322             if (ret < 0)
 323                 return ret;
 324
 325             size = 512 - shift;
 326             if (size > count)
 327                 size = count;
 328             memcpy(buf, s->aligned_buf + shift, size);
 329
 330             buf += size;
 331             offset += size;
 332             count -= size;
 333             sum += size;
 334
 335             if (count == 0)
 336                 return sum;
 337         }
 338         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 339
 340             /* read on aligned buffer */
 341
 342             while (count) {
 343
 344                 size = (count + 0x1ff) & ~0x1ff;
 345                 if (size > ALIGNED_BUFFER_SIZE)
 346                     size = ALIGNED_BUFFER_SIZE;
 347
 348                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
 349                 if (ret < 0)
 350                     return ret;
 351
 352                 size = ret;
 353                 if (size > count)
 354                     size = count;
 355
 356                 memcpy(buf, s->aligned_buf, size);
 357
 358                 buf += size;
 359                 offset += size;
 360                 count -= size;
 361                 sum += size;
 362             }
 363
 364             return sum;
 365         }
 366     }
 367
 368     return raw_pread_aligned(bs, offset, buf, count) + sum;
 369 }
 370
 371 static int raw_read(BlockDriverState *bs, int64_t sector_num,
 372                     uint8_t *buf, int nb_sectors)
 373 {
 374     int ret;
 375
 376     ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
 377     if (ret == (nb_sectors * 512))
 378         ret = 0;
 379     return ret;
 380 }
 381
 382 /*
 383  * offset and count are in bytes and possibly not aligned. For files opened
 384  * with O_DIRECT, necessary alignments are ensured before calling
 385  * raw_pwrite_aligned to do the actual write.
 386  */
 387 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 388                       const uint8_t *buf, int count)
 389 {
 390     BDRVRawState *s = bs->opaque;
 391     int size, ret, shift, sum;
 392
 393     sum = 0;
 394
 395     if (s->aligned_buf != NULL) {
 396
 397         if (offset & 0x1ff) {
 398             /* align offset on a 512 bytes boundary */
 399             shift = offset & 0x1ff;
 400             ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
 401             if (ret < 0)
 402                 return ret;
 403
 404             size = 512 - shift;
 405             if (size > count)
 406                 size = count;
 407             memcpy(s->aligned_buf + shift, buf, size);
 408
 409             ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
 410             if (ret < 0)
 411                 return ret;
 412
 413             buf += size;
 414             offset += size;
 415             count -= size;
 416             sum += size;
 417
 418             if (count == 0)
 419                 return sum;
 420         }
 421         if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
 422
 423             while ((size = (count & ~0x1ff)) != 0) {
 424
 425                 if (size > ALIGNED_BUFFER_SIZE)
 426                     size = ALIGNED_BUFFER_SIZE;
 427
 428                 memcpy(s->aligned_buf, buf, size);
 429
 430                 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
 431                 if (ret < 0)
 432                     return ret;
 433
 434                 buf += ret;
 435                 offset += ret;
 436                 count -= ret;
 437                 sum += ret;
 438             }
 439             /* here, count < 512 because (count & ~0x1ff) == 0 */
 440             if (count) {
 441                 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
 442                 if (ret < 0)
 443                     return ret;
 444                  memcpy(s->aligned_buf, buf, count);
 445
 446                  ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
 447                  if (ret < 0)
 448                      return ret;
 449                  if (count < ret)
 450                      ret = count;
 451
 452                  sum += ret;
 453             }
 454             return sum;
 455         }
 456     }
 457     return raw_pwrite_aligned(bs, offset, buf, count) + sum;
 458 }
 459
 460 static int raw_write(BlockDriverState *bs, int64_t sector_num,
 461                      const uint8_t *buf, int nb_sectors)
 462 {
 463     int ret;
 464     ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
 465     if (ret == (nb_sectors * 512))
 466         ret = 0;
 467     return ret;
 468 }
 469
 470 #ifdef CONFIG_AIO
 471 /***********************************************************/
 472 /* Unix AIO using POSIX AIO */
 473
 474 typedef struct RawAIOCB {
 475     BlockDriverAIOCB common;
 476     struct qemu_paiocb aiocb;
 477     struct RawAIOCB *next;
 478     int ret;
 479 } RawAIOCB;
 480
 481 typedef struct PosixAioState
 482 {
 483     int rfd, wfd;
 484     RawAIOCB *first_aio;
 485 } PosixAioState;
 486
 487 static void posix_aio_read(void *opaque)
 488 {
 489     PosixAioState *s = opaque;
 490     RawAIOCB *acb, **pacb;
 491     int ret;
 492     ssize_t len;
 493
 494     /* read all bytes from signal pipe */
 495     for (;;) {
 496         char bytes[16];
 497
 498         len = read(s->rfd, bytes, sizeof(bytes));
 499         if (len == -1 && errno == EINTR)
 500             continue; /* try again */
 501         if (len == sizeof(bytes))
 502             continue; /* more to read */
 503         break;
 504     }
 505
 506     for(;;) {
 507         pacb = &s->first_aio;
 508         for(;;) {
 509             acb = *pacb;
 510             if (!acb)
 511                 goto the_end;
 512             ret = qemu_paio_error(&acb->aiocb);
 513             if (ret == ECANCELED) {
 514                 /* remove the request */
 515                 *pacb = acb->next;
 516                 qemu_aio_release(acb);
 517             } else if (ret != EINPROGRESS) {
 518                 /* end of aio */
 519                 if (ret == 0) {
 520                     ret = qemu_paio_return(&acb->aiocb);
 521                     if (ret == acb->aiocb.aio_nbytes)
 522                         ret = 0;
 523                     else
 524                         ret = -EINVAL;
 525                 } else {
 526                     ret = -ret;
 527                 }
 528                 /* remove the request */
 529                 *pacb = acb->next;
 530                 /* call the callback */
 531                 acb->common.cb(acb->common.opaque, ret);
 532                 qemu_aio_release(acb);
 533                 break;
 534             } else {
 535                 pacb = &acb->next;
 536             }
 537         }
 538     }
 539  the_end: ;
 540 }
 541
 542 static int posix_aio_flush(void *opaque)
 543 {
 544     PosixAioState *s = opaque;
 545     return !!s->first_aio;
 546 }
 547
 548 static PosixAioState *posix_aio_state;
 549
 550 static void aio_signal_handler(int signum)
 551 {
 552     if (posix_aio_state) {
 553         char byte = 0;
 554
 555         write(posix_aio_state->wfd, &byte, sizeof(byte));
 556     }
 557
 558     qemu_service_io();
 559 }
 560
 561 static int posix_aio_init(void)
 562 {
 563     struct sigaction act;
 564     PosixAioState *s;
 565     int fds[2];
 566     struct qemu_paioinit ai;
 567
 568     if (posix_aio_state)
 569         return 0;
 570
 571     s = qemu_malloc(sizeof(PosixAioState));
 572
 573     sigfillset(&act.sa_mask);
 574     act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
 575     act.sa_handler = aio_signal_handler;
 576     sigaction(SIGUSR2, &act, NULL);
 577
 578     s->first_aio = NULL;
 579     if (pipe(fds) == -1) {
 580         fprintf(stderr, "failed to create pipe\n");
 581         return -errno;
 582     }
 583
 584     s->rfd = fds[0];
 585     s->wfd = fds[1];
 586
 587     fcntl(s->rfd, F_SETFL, O_NONBLOCK);
 588     fcntl(s->wfd, F_SETFL, O_NONBLOCK);
 589
 590     qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
 591
 592     memset(&ai, 0, sizeof(ai));
 593     ai.aio_threads = 64;
 594     ai.aio_num = 64;
 595     qemu_paio_init(&ai);
 596
 597     posix_aio_state = s;
 598
 599     return 0;
 600 }
 601
 602 static void raw_aio_remove(RawAIOCB *acb)
 603 {
 604     RawAIOCB **pacb;
 605
 606     /* remove the callback from the queue */
 607     pacb = &posix_aio_state->first_aio;
 608     for(;;) {
 609         if (*pacb == NULL) {
 610             fprintf(stderr, "raw_aio_remove: aio request not found!\n");
 611             break;
 612         } else if (*pacb == acb) {
 613             *pacb = acb->next;
 614             qemu_aio_release(acb);
 615             break;
 616         }
 617         pacb = &(*pacb)->next;
 618     }
 619 }
 620
 621 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
 622 {
 623     int ret;
 624     RawAIOCB *acb = (RawAIOCB *)blockacb;
 625
 626     ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
 627     if (ret == QEMU_PAIO_NOTCANCELED) {
 628         /* fail safe: if the aio could not be canceled, we wait for
 629            it */
 630         while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
 631     }
 632
 633     raw_aio_remove(acb);
 634 }
 635
 636 static AIOPool raw_aio_pool = {
 637     .aiocb_size         = sizeof(RawAIOCB),
 638     .cancel             = raw_aio_cancel,
 639 };
 640
 641 static RawAIOCB *raw_aio_setup(BlockDriverState *bs, int64_t sector_num,
 642         QEMUIOVector *qiov, int nb_sectors,
 643         BlockDriverCompletionFunc *cb, void *opaque)
 644 {
 645     BDRVRawState *s = bs->opaque;
 646     RawAIOCB *acb;
 647
 648     if (fd_open(bs) < 0)
 649         return NULL;
 650
 651     acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque);
 652     if (!acb)
 653         return NULL;
 654     acb->aiocb.aio_fildes = s->fd;
 655     acb->aiocb.ev_signo = SIGUSR2;
 656     acb->aiocb.aio_iov = qiov->iov;
 657     acb->aiocb.aio_niov = qiov->niov;
 658     acb->aiocb.aio_nbytes = nb_sectors * 512;
 659     acb->aiocb.aio_offset = sector_num * 512;
 660     acb->aiocb.aio_flags = 0;
 661
 662     /*
 663      * If O_DIRECT is used the buffer needs to be aligned on a sector
 664      * boundary. Tell the low level code to ensure that in case it's
 665      * not done yet.
 666      */
 667     if (s->aligned_buf)
 668         acb->aiocb.aio_flags |= QEMU_AIO_SECTOR_ALIGNED;
 669
 670     acb->next = posix_aio_state->first_aio;
 671     posix_aio_state->first_aio = acb;
 672     return acb;
 673 }
 674
 675 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
 676         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 677         BlockDriverCompletionFunc *cb, void *opaque)
 678 {
 679     RawAIOCB *acb;
 680
 681     acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
 682     if (!acb)
 683         return NULL;
 684     if (qemu_paio_read(&acb->aiocb) < 0) {
 685         raw_aio_remove(acb);
 686         return NULL;
 687     }
 688     return &acb->common;
 689 }
 690
 691 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
 692         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 693         BlockDriverCompletionFunc *cb, void *opaque)
 694 {
 695     RawAIOCB *acb;
 696
 697     acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
 698     if (!acb)
 699         return NULL;
 700     if (qemu_paio_write(&acb->aiocb) < 0) {
 701         raw_aio_remove(acb);
 702         return NULL;
 703     }
 704     return &acb->common;
 705 }
 706 #else /* CONFIG_AIO */
 707 static int posix_aio_init(void)
 708 {
 709     return 0;
 710 }
 711 #endif /* CONFIG_AIO */
 712
 713
 714 static void raw_close(BlockDriverState *bs)
 715 {
 716     BDRVRawState *s = bs->opaque;
 717     if (s->fd >= 0) {
 718         close(s->fd);
 719         s->fd = -1;
 720         if (s->aligned_buf != NULL)
 721             qemu_free(s->aligned_buf);
 722     }
 723 }
 724
 725 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 726 {
 727     BDRVRawState *s = bs->opaque;
 728     if (s->type != FTYPE_FILE)
 729         return -ENOTSUP;
 730     if (ftruncate(s->fd, offset) < 0)
 731         return -errno;
 732     return 0;
 733 }
 734
 735 #ifdef __OpenBSD__
 736 static int64_t raw_getlength(BlockDriverState *bs)
 737 {
 738     BDRVRawState *s = bs->opaque;
 739     int fd = s->fd;
 740     struct stat st;
 741
 742     if (fstat(fd, &st))
 743         return -1;
 744     if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
 745         struct disklabel dl;
 746
 747         if (ioctl(fd, DIOCGDINFO, &dl))
 748             return -1;
 749         return (uint64_t)dl.d_secsize *
 750             dl.d_partitions[DISKPART(st.st_rdev)].p_size;
 751     } else
 752         return st.st_size;
 753 }
 754 #else /* !__OpenBSD__ */
 755 static int64_t  raw_getlength(BlockDriverState *bs)
 756 {
 757     BDRVRawState *s = bs->opaque;
 758     int fd = s->fd;
 759     int64_t size;
 760 #ifdef HOST_BSD
 761     struct stat sb;
 762 #ifdef __FreeBSD__
 763     int reopened = 0;
 764 #endif
 765 #endif
 766 #ifdef __sun__
 767     struct dk_minfo minfo;
 768     int rv;
 769 #endif
 770     int ret;
 771
 772     ret = fd_open(bs);
 773     if (ret < 0)
 774         return ret;
 775
 776 #ifdef HOST_BSD
 777 #ifdef __FreeBSD__
 778 again:
 779 #endif
 780     if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
 781 #ifdef DIOCGMEDIASIZE
 782         if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
 783 #elif defined(DIOCGPART)
 784         {
 785                 struct partinfo pi;
 786                 if (ioctl(fd, DIOCGPART, &pi) == 0)
 787                         size = pi.media_size;
 788                 else
 789                         size = 0;
 790         }
 791         if (size == 0)
 792 #endif
 793 #ifdef CONFIG_COCOA
 794         size = LONG_LONG_MAX;
 795 #else
 796         size = lseek(fd, 0LL, SEEK_END);
 797 #endif
 798 #ifdef __FreeBSD__
 799         switch(s->type) {
 800         case FTYPE_CD:
 801             /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
 802             if (size == 2048LL * (unsigned)-1)
 803                 size = 0;
 804             /* XXX no disc?  maybe we need to reopen... */
 805             if (size <= 0 && !reopened && cd_open(bs) >= 0) {
 806                 reopened = 1;
 807                 goto again;
 808             }
 809         }
 810 #endif
 811     } else
 812 #endif
 813 #ifdef __sun__
 814     /*
 815      * use the DKIOCGMEDIAINFO ioctl to read the size.
 816      */
 817     rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
 818     if ( rv != -1 ) {
 819         size = minfo.dki_lbsize * minfo.dki_capacity;
 820     } else /* there are reports that lseek on some devices
 821               fails, but irc discussion said that contingency
 822               on contingency was overkill */
 823 #endif
 824     {
 825         size = lseek(fd, 0, SEEK_END);
 826     }
 827     return size;
 828 }
 829 #endif
 830
 831 static int raw_create(const char *filename, QEMUOptionParameter *options)
 832 {
 833     int fd;
 834     int64_t total_size = 0;
 835
 836     /* Read out options */
 837     while (options && options->name) {
 838         if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
 839             total_size = options->value.n / 512;
 840         }
 841         options++;
 842     }
 843
 844     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 845               0644);
 846     if (fd < 0)
 847         return -EIO;
 848     ftruncate(fd, total_size * 512);
 849     close(fd);
 850     return 0;
 851 }
 852
 853 static void raw_flush(BlockDriverState *bs)
 854 {
 855     BDRVRawState *s = bs->opaque;
 856     fsync(s->fd);
 857 }
 858
 859
 860 static QEMUOptionParameter raw_create_options[] = {
 861     { BLOCK_OPT_SIZE,           OPT_SIZE },
 862     { NULL }
 863 };
 864
 865 static BlockDriver bdrv_raw = {
 866     .format_name = "raw",
 867     .instance_size = sizeof(BDRVRawState),
 868     .bdrv_probe = NULL, /* no probe for protocols */
 869     .bdrv_open = raw_open,
 870     .bdrv_read = raw_read,
 871     .bdrv_write = raw_write,
 872     .bdrv_close = raw_close,
 873     .bdrv_create = raw_create,
 874     .bdrv_flush = raw_flush,
 875
 876 #ifdef CONFIG_AIO
 877     .bdrv_aio_readv = raw_aio_readv,
 878     .bdrv_aio_writev = raw_aio_writev,
 879 #endif
 880
 881     .bdrv_truncate = raw_truncate,
 882     .bdrv_getlength = raw_getlength,
 883
 884     .create_options = raw_create_options,
 885 };
 886
 887 /***********************************************/
 888 /* host device */
 889
 890 #ifdef CONFIG_COCOA
 891 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
 892 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
 893
 894 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
 895 {
 896     kern_return_t       kernResult;
 897     mach_port_t     masterPort;
 898     CFMutableDictionaryRef  classesToMatch;
 899
 900     kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
 901     if ( KERN_SUCCESS != kernResult ) {
 902         printf( "IOMasterPort returned %d\n", kernResult );
 903     }
 904
 905     classesToMatch = IOServiceMatching( kIOCDMediaClass );
 906     if ( classesToMatch == NULL ) {
 907         printf( "IOServiceMatching returned a NULL dictionary.\n" );
 908     } else {
 909     CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
 910     }
 911     kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
 912     if ( KERN_SUCCESS != kernResult )
 913     {
 914         printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
 915     }
 916
 917     return kernResult;
 918 }
 919
 920 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
 921 {
 922     io_object_t     nextMedia;
 923     kern_return_t   kernResult = KERN_FAILURE;
 924     *bsdPath = '\0';
 925     nextMedia = IOIteratorNext( mediaIterator );
 926     if ( nextMedia )
 927     {
 928         CFTypeRef   bsdPathAsCFString;
 929     bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
 930         if ( bsdPathAsCFString ) {
 931             size_t devPathLength;
 932             strcpy( bsdPath, _PATH_DEV );
 933             strcat( bsdPath, "r" );
 934             devPathLength = strlen( bsdPath );
 935             if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
 936                 kernResult = KERN_SUCCESS;
 937             }
 938             CFRelease( bsdPathAsCFString );
 939         }
 940         IOObjectRelease( nextMedia );
 941     }
 942
 943     return kernResult;
 944 }
 945
 946 #endif
 947
 948 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
 949 {
 950     BDRVRawState *s = bs->opaque;
 951     int fd, open_flags, ret;
 952
 953     posix_aio_init();
 954
 955 #ifdef CONFIG_COCOA
 956     if (strstart(filename, "/dev/cdrom", NULL)) {
 957         kern_return_t kernResult;
 958         io_iterator_t mediaIterator;
 959         char bsdPath[ MAXPATHLEN ];
 960         int fd;
 961
 962         kernResult = FindEjectableCDMedia( &mediaIterator );
 963         kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
 964
 965         if ( bsdPath[ 0 ] != '\0' ) {
 966             strcat(bsdPath,"s0");
 967             /* some CDs don't have a partition 0 */
 968             fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
 969             if (fd < 0) {
 970                 bsdPath[strlen(bsdPath)-1] = '1';
 971             } else {
 972                 close(fd);
 973             }
 974             filename = bsdPath;
 975         }
 976
 977         if ( mediaIterator )
 978             IOObjectRelease( mediaIterator );
 979     }
 980 #endif
 981     open_flags = O_BINARY;
 982     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 983         open_flags |= O_RDWR;
 984     } else {
 985         open_flags |= O_RDONLY;
 986         bs->read_only = 1;
 987     }
 988     /* Use O_DSYNC for write-through caching, no flags for write-back caching,
 989      * and O_DIRECT for no caching. */
 990     if ((flags & BDRV_O_NOCACHE))
 991         open_flags |= O_DIRECT;
 992     else if (!(flags & BDRV_O_CACHE_WB))
 993         open_flags |= O_DSYNC;
 994
 995     s->type = FTYPE_FILE;
 996 #if defined(__linux__)
 997     if (strstart(filename, "/dev/cd", NULL)) {
 998         /* open will not fail even if no CD is inserted */
 999         open_flags |= O_NONBLOCK;
1000         s->type = FTYPE_CD;
1001     } else if (strstart(filename, "/dev/fd", NULL)) {
1002         s->type = FTYPE_FD;
1003         s->fd_open_flags = open_flags;
1004         /* open will not fail even if no floppy is inserted */
1005         open_flags |= O_NONBLOCK;
1006 #ifdef CONFIG_AIO
1007     } else if (strstart(filename, "/dev/sg", NULL)) {
1008         bs->sg = 1;
1009 #endif
1010     }
1011 #endif
1012 #if defined(__FreeBSD__)
1013     if (strstart(filename, "/dev/cd", NULL) ||
1014         strstart(filename, "/dev/acd", NULL)) {
1015         s->type = FTYPE_CD;
1016         s->cd_open_flags = open_flags;
1017     }
1018 #endif
1019     s->fd = -1;
1020     fd = open(filename, open_flags, 0644);
1021     if (fd < 0) {
1022         ret = -errno;
1023         if (ret == -EROFS)
1024             ret = -EACCES;
1025         return ret;
1026     }
1027     s->fd = fd;
1028 #if defined(__FreeBSD__)
1029     /* make sure the door isnt locked at this time */
1030     if (s->type == FTYPE_CD)
1031         ioctl (s->fd, CDIOCALLOW);
1032 #endif
1033 #if defined(__linux__)
1034     /* close fd so that we can reopen it as needed */
1035     if (s->type == FTYPE_FD) {
1036         close(s->fd);
1037         s->fd = -1;
1038         s->fd_media_changed = 1;
1039     }
1040 #endif
1041     return 0;
1042 }
1043
1044 #if defined(__linux__)
1045 /* Note: we do not have a reliable method to detect if the floppy is
1046    present. The current method is to try to open the floppy at every
1047    I/O and to keep it opened during a few hundreds of ms. */
1048 static int fd_open(BlockDriverState *bs)
1049 {
1050     BDRVRawState *s = bs->opaque;
1051     int last_media_present;
1052
1053     if (s->type != FTYPE_FD)
1054         return 0;
1055     last_media_present = (s->fd >= 0);
1056     if (s->fd >= 0 &&
1057         (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1058         close(s->fd);
1059         s->fd = -1;
1060 #ifdef DEBUG_FLOPPY
1061         printf("Floppy closed\n");
1062 #endif
1063     }
1064     if (s->fd < 0) {
1065         if (s->fd_got_error &&
1066             (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1067 #ifdef DEBUG_FLOPPY
1068             printf("No floppy (open delayed)\n");
1069 #endif
1070             return -EIO;
1071         }
1072         s->fd = open(bs->filename, s->fd_open_flags);
1073         if (s->fd < 0) {
1074             s->fd_error_time = qemu_get_clock(rt_clock);
1075             s->fd_got_error = 1;
1076             if (last_media_present)
1077                 s->fd_media_changed = 1;
1078 #ifdef DEBUG_FLOPPY
1079             printf("No floppy\n");
1080 #endif
1081             return -EIO;
1082         }
1083 #ifdef DEBUG_FLOPPY
1084         printf("Floppy opened\n");
1085 #endif
1086     }
1087     if (!last_media_present)
1088         s->fd_media_changed = 1;
1089     s->fd_open_time = qemu_get_clock(rt_clock);
1090     s->fd_got_error = 0;
1091     return 0;
1092 }
1093
1094 static int raw_is_inserted(BlockDriverState *bs)
1095 {
1096     BDRVRawState *s = bs->opaque;
1097     int ret;
1098
1099     switch(s->type) {
1100     case FTYPE_CD:
1101         ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1102         if (ret == CDS_DISC_OK)
1103             return 1;
1104         else
1105             return 0;
1106         break;
1107     case FTYPE_FD:
1108         ret = fd_open(bs);
1109         return (ret >= 0);
1110     default:
1111         return 1;
1112     }
1113 }
1114
1115 /* currently only used by fdc.c, but a CD version would be good too */
1116 static int raw_media_changed(BlockDriverState *bs)
1117 {
1118     BDRVRawState *s = bs->opaque;
1119
1120     switch(s->type) {
1121     case FTYPE_FD:
1122         {
1123             int ret;
1124             /* XXX: we do not have a true media changed indication. It
1125                does not work if the floppy is changed without trying
1126                to read it */
1127             fd_open(bs);
1128             ret = s->fd_media_changed;
1129             s->fd_media_changed = 0;
1130 #ifdef DEBUG_FLOPPY
1131             printf("Floppy changed=%d\n", ret);
1132 #endif
1133             return ret;
1134         }
1135     default:
1136         return -ENOTSUP;
1137     }
1138 }
1139
1140 static int raw_eject(BlockDriverState *bs, int eject_flag)
1141 {
1142     BDRVRawState *s = bs->opaque;
1143
1144     switch(s->type) {
1145     case FTYPE_CD:
1146         if (eject_flag) {
1147             if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
1148                 perror("CDROMEJECT");
1149         } else {
1150             if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
1151                 perror("CDROMEJECT");
1152         }
1153         break;
1154     case FTYPE_FD:
1155         {
1156             int fd;
1157             if (s->fd >= 0) {
1158                 close(s->fd);
1159                 s->fd = -1;
1160             }
1161             fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
1162             if (fd >= 0) {
1163                 if (ioctl(fd, FDEJECT, 0) < 0)
1164                     perror("FDEJECT");
1165                 close(fd);
1166             }
1167         }
1168         break;
1169     default:
1170         return -ENOTSUP;
1171     }
1172     return 0;
1173 }
1174
1175 static int raw_set_locked(BlockDriverState *bs, int locked)
1176 {
1177     BDRVRawState *s = bs->opaque;
1178
1179     switch(s->type) {
1180     case FTYPE_CD:
1181         if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
1182             /* Note: an error can happen if the distribution automatically
1183                mounts the CD-ROM */
1184             //        perror("CDROM_LOCKDOOR");
1185         }
1186         break;
1187     default:
1188         return -ENOTSUP;
1189     }
1190     return 0;
1191 }
1192
1193 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1194 {
1195     BDRVRawState *s = bs->opaque;
1196
1197     return ioctl(s->fd, req, buf);
1198 }
1199
1200 #ifdef CONFIG_AIO
1201 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
1202         unsigned long int req, void *buf,
1203         BlockDriverCompletionFunc *cb, void *opaque)
1204 {
1205     BDRVRawState *s = bs->opaque;
1206     RawAIOCB *acb;
1207
1208     if (fd_open(bs) < 0)
1209         return NULL;
1210
1211     acb = qemu_aio_get(&raw_aio_pool, bs, cb, opaque);
1212     if (!acb)
1213         return NULL;
1214     acb->aiocb.aio_fildes = s->fd;
1215     acb->aiocb.ev_signo = SIGUSR2;
1216     acb->aiocb.aio_offset = 0;
1217     acb->aiocb.aio_flags = 0;
1218
1219     acb->next = posix_aio_state->first_aio;
1220     posix_aio_state->first_aio = acb;
1221
1222     acb->aiocb.aio_ioctl_buf = buf;
1223     acb->aiocb.aio_ioctl_cmd = req;
1224     if (qemu_paio_ioctl(&acb->aiocb) < 0) {
1225         raw_aio_remove(acb);
1226         return NULL;
1227     }
1228
1229     return &acb->common;
1230 }
1231 #endif
1232
1233 #elif defined(__FreeBSD__)
1234
1235 static int fd_open(BlockDriverState *bs)
1236 {
1237     BDRVRawState *s = bs->opaque;
1238
1239     /* this is just to ensure s->fd is sane (its called by io ops) */
1240     if (s->fd >= 0)
1241         return 0;
1242     return -EIO;
1243 }
1244
1245 static int cd_open(BlockDriverState *bs)
1246 {
1247 #if defined(__FreeBSD__)
1248     BDRVRawState *s = bs->opaque;
1249     int fd;
1250
1251     switch(s->type) {
1252     case FTYPE_CD:
1253         /* XXX force reread of possibly changed/newly loaded disc,
1254          * FreeBSD seems to not notice sometimes... */
1255         if (s->fd >= 0)
1256             close (s->fd);
1257         fd = open(bs->filename, s->cd_open_flags, 0644);
1258         if (fd < 0) {
1259             s->fd = -1;
1260             return -EIO;
1261         }
1262         s->fd = fd;
1263         /* make sure the door isnt locked at this time */
1264         ioctl (s->fd, CDIOCALLOW);
1265     }
1266 #endif
1267     return 0;
1268 }
1269
1270 static int raw_is_inserted(BlockDriverState *bs)
1271 {
1272     BDRVRawState *s = bs->opaque;
1273
1274     switch(s->type) {
1275     case FTYPE_CD:
1276         return (raw_getlength(bs) > 0);
1277     case FTYPE_FD:
1278         /* XXX handle this */
1279         /* FALLTHRU */
1280     default:
1281         return 1;
1282     }
1283 }
1284
1285 static int raw_media_changed(BlockDriverState *bs)
1286 {
1287     return -ENOTSUP;
1288 }
1289
1290 static int raw_eject(BlockDriverState *bs, int eject_flag)
1291 {
1292     BDRVRawState *s = bs->opaque;
1293
1294     switch(s->type) {
1295     case FTYPE_CD:
1296         if (s->fd < 0)
1297             return -ENOTSUP;
1298         (void) ioctl (s->fd, CDIOCALLOW);
1299         if (eject_flag) {
1300             if (ioctl (s->fd, CDIOCEJECT) < 0)
1301                 perror("CDIOCEJECT");
1302         } else {
1303             if (ioctl (s->fd, CDIOCCLOSE) < 0)
1304                 perror("CDIOCCLOSE");
1305         }
1306         if (cd_open(bs) < 0)
1307             return -ENOTSUP;
1308         break;
1309     case FTYPE_FD:
1310         /* XXX handle this */
1311         /* FALLTHRU */
1312     default:
1313         return -ENOTSUP;
1314     }
1315     return 0;
1316 }
1317
1318 static int raw_set_locked(BlockDriverState *bs, int locked)
1319 {
1320     BDRVRawState *s = bs->opaque;
1321
1322     switch(s->type) {
1323     case FTYPE_CD:
1324         if (s->fd < 0)
1325             return -ENOTSUP;
1326         if (ioctl (s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1327             /* Note: an error can happen if the distribution automatically
1328                mounts the CD-ROM */
1329             //        perror("CDROM_LOCKDOOR");
1330         }
1331         break;
1332     default:
1333         return -ENOTSUP;
1334     }
1335     return 0;
1336 }
1337
1338 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1339 {
1340     return -ENOTSUP;
1341 }
1342 #else /* !linux && !FreeBSD */
1343
1344 static int fd_open(BlockDriverState *bs)
1345 {
1346     return 0;
1347 }
1348
1349 static int raw_is_inserted(BlockDriverState *bs)
1350 {
1351     return 1;
1352 }
1353
1354 static int raw_media_changed(BlockDriverState *bs)
1355 {
1356     return -ENOTSUP;
1357 }
1358
1359 static int raw_eject(BlockDriverState *bs, int eject_flag)
1360 {
1361     return -ENOTSUP;
1362 }
1363
1364 static int raw_set_locked(BlockDriverState *bs, int locked)
1365 {
1366     return -ENOTSUP;
1367 }
1368
1369 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1370 {
1371     return -ENOTSUP;
1372 }
1373
1374 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
1375         unsigned long int req, void *buf,
1376         BlockDriverCompletionFunc *cb, void *opaque)
1377 {
1378     return NULL;
1379 }
1380 #endif /* !linux && !FreeBSD */
1381
1382 static int hdev_create(const char *filename, QEMUOptionParameter *options)
1383 {
1384     int fd;
1385     int ret = 0;
1386     struct stat stat_buf;
1387     int64_t total_size = 0;
1388
1389     /* Read out options */
1390     while (options && options->name) {
1391         if (!strcmp(options->name, "size")) {
1392             total_size = options->value.n / 512;
1393         }
1394         options++;
1395     }
1396
1397     fd = open(filename, O_WRONLY | O_BINARY);
1398     if (fd < 0)
1399         return -EIO;
1400
1401     if (fstat(fd, &stat_buf) < 0)
1402         ret = -EIO;
1403     else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
1404         ret = -EIO;
1405     else if (lseek(fd, 0, SEEK_END) < total_size * 512)
1406         ret = -ENOSPC;
1407
1408     close(fd);
1409     return ret;
1410 }
1411
1412 static BlockDriver bdrv_host_device = {
1413     .format_name        = "host_device",
1414     .instance_size      = sizeof(BDRVRawState),
1415     .bdrv_open          = hdev_open,
1416     .bdrv_close         = raw_close,
1417     .bdrv_create        = hdev_create,
1418     .bdrv_flush         = raw_flush,
1419
1420 #ifdef CONFIG_AIO
1421     .bdrv_aio_readv     = raw_aio_readv,
1422     .bdrv_aio_writev    = raw_aio_writev,
1423 #endif
1424
1425     .bdrv_read          = raw_read,
1426     .bdrv_write         = raw_write,
1427     .bdrv_getlength     = raw_getlength,
1428
1429     /* removable device support */
1430     .bdrv_is_inserted   = raw_is_inserted,
1431     .bdrv_media_changed = raw_media_changed,
1432     .bdrv_eject         = raw_eject,
1433     .bdrv_set_locked    = raw_set_locked,
1434     /* generic scsi device */
1435     .bdrv_ioctl         = raw_ioctl,
1436 #ifdef CONFIG_AIO
1437     .bdrv_aio_ioctl     = raw_aio_ioctl,
1438 #endif
1439 };
1440
1441 static void bdrv_raw_init(void)
1442 {
1443     bdrv_register(&bdrv_raw);
1444     bdrv_register(&bdrv_host_device);
1445 }
1446
1447 block_init(bdrv_raw_init);