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;
 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 RawAIOCB *raw_aio_setup(BlockDriverState *bs, int64_t sector_num,
 603         QEMUIOVector *qiov, int nb_sectors,
 604         BlockDriverCompletionFunc *cb, void *opaque)
 605 {
 606     BDRVRawState *s = bs->opaque;
 607     RawAIOCB *acb;
 608
 609     if (fd_open(bs) < 0)
 610         return NULL;
 611
 612     acb = qemu_aio_get(bs, cb, opaque);
 613     if (!acb)
 614         return NULL;
 615     acb->aiocb.aio_fildes = s->fd;
 616     acb->aiocb.ev_signo = SIGUSR2;
 617     acb->aiocb.aio_iov = qiov->iov;
 618     acb->aiocb.aio_niov = qiov->niov;
 619     acb->aiocb.aio_nbytes = nb_sectors * 512;
 620     acb->aiocb.aio_offset = sector_num * 512;
 621     acb->aiocb.aio_flags = 0;
 622
 623     /*
 624      * If O_DIRECT is used the buffer needs to be aligned on a sector
 625      * boundary. Tell the low level code to ensure that in case it's
 626      * not done yet.
 627      */
 628     if (s->aligned_buf)
 629         acb->aiocb.aio_flags |= QEMU_AIO_SECTOR_ALIGNED;
 630
 631     acb->next = posix_aio_state->first_aio;
 632     posix_aio_state->first_aio = acb;
 633     return acb;
 634 }
 635
 636 static void raw_aio_remove(RawAIOCB *acb)
 637 {
 638     RawAIOCB **pacb;
 639
 640     /* remove the callback from the queue */
 641     pacb = &posix_aio_state->first_aio;
 642     for(;;) {
 643         if (*pacb == NULL) {
 644             fprintf(stderr, "raw_aio_remove: aio request not found!\n");
 645             break;
 646         } else if (*pacb == acb) {
 647             *pacb = acb->next;
 648             qemu_aio_release(acb);
 649             break;
 650         }
 651         pacb = &(*pacb)->next;
 652     }
 653 }
 654
 655 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
 656         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 657         BlockDriverCompletionFunc *cb, void *opaque)
 658 {
 659     RawAIOCB *acb;
 660
 661     acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
 662     if (!acb)
 663         return NULL;
 664     if (qemu_paio_read(&acb->aiocb) < 0) {
 665         raw_aio_remove(acb);
 666         return NULL;
 667     }
 668     return &acb->common;
 669 }
 670
 671 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
 672         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
 673         BlockDriverCompletionFunc *cb, void *opaque)
 674 {
 675     RawAIOCB *acb;
 676
 677     acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
 678     if (!acb)
 679         return NULL;
 680     if (qemu_paio_write(&acb->aiocb) < 0) {
 681         raw_aio_remove(acb);
 682         return NULL;
 683     }
 684     return &acb->common;
 685 }
 686
 687 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
 688 {
 689     int ret;
 690     RawAIOCB *acb = (RawAIOCB *)blockacb;
 691
 692     ret = qemu_paio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
 693     if (ret == QEMU_PAIO_NOTCANCELED) {
 694         /* fail safe: if the aio could not be canceled, we wait for
 695            it */
 696         while (qemu_paio_error(&acb->aiocb) == EINPROGRESS);
 697     }
 698
 699     raw_aio_remove(acb);
 700 }
 701 #else /* CONFIG_AIO */
 702 static int posix_aio_init(void)
 703 {
 704     return 0;
 705 }
 706 #endif /* CONFIG_AIO */
 707
 708
 709 static void raw_close(BlockDriverState *bs)
 710 {
 711     BDRVRawState *s = bs->opaque;
 712     if (s->fd >= 0) {
 713         close(s->fd);
 714         s->fd = -1;
 715         if (s->aligned_buf != NULL)
 716             qemu_free(s->aligned_buf);
 717     }
 718 }
 719
 720 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 721 {
 722     BDRVRawState *s = bs->opaque;
 723     if (s->type != FTYPE_FILE)
 724         return -ENOTSUP;
 725     if (ftruncate(s->fd, offset) < 0)
 726         return -errno;
 727     return 0;
 728 }
 729
 730 #ifdef __OpenBSD__
 731 static int64_t raw_getlength(BlockDriverState *bs)
 732 {
 733     BDRVRawState *s = bs->opaque;
 734     int fd = s->fd;
 735     struct stat st;
 736
 737     if (fstat(fd, &st))
 738         return -1;
 739     if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
 740         struct disklabel dl;
 741
 742         if (ioctl(fd, DIOCGDINFO, &dl))
 743             return -1;
 744         return (uint64_t)dl.d_secsize *
 745             dl.d_partitions[DISKPART(st.st_rdev)].p_size;
 746     } else
 747         return st.st_size;
 748 }
 749 #else /* !__OpenBSD__ */
 750 static int64_t  raw_getlength(BlockDriverState *bs)
 751 {
 752     BDRVRawState *s = bs->opaque;
 753     int fd = s->fd;
 754     int64_t size;
 755 #ifdef HOST_BSD
 756     struct stat sb;
 757 #ifdef __FreeBSD__
 758     int reopened = 0;
 759 #endif
 760 #endif
 761 #ifdef __sun__
 762     struct dk_minfo minfo;
 763     int rv;
 764 #endif
 765     int ret;
 766
 767     ret = fd_open(bs);
 768     if (ret < 0)
 769         return ret;
 770
 771 #ifdef HOST_BSD
 772 #ifdef __FreeBSD__
 773 again:
 774 #endif
 775     if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
 776 #ifdef DIOCGMEDIASIZE
 777         if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
 778 #elif defined(DIOCGPART)
 779         {
 780                 struct partinfo pi;
 781                 if (ioctl(fd, DIOCGPART, &pi) == 0)
 782                         size = pi.media_size;
 783                 else
 784                         size = 0;
 785         }
 786         if (size == 0)
 787 #endif
 788 #ifdef CONFIG_COCOA
 789         size = LONG_LONG_MAX;
 790 #else
 791         size = lseek(fd, 0LL, SEEK_END);
 792 #endif
 793 #ifdef __FreeBSD__
 794         switch(s->type) {
 795         case FTYPE_CD:
 796             /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
 797             if (size == 2048LL * (unsigned)-1)
 798                 size = 0;
 799             /* XXX no disc?  maybe we need to reopen... */
 800             if (size <= 0 && !reopened && cd_open(bs) >= 0) {
 801                 reopened = 1;
 802                 goto again;
 803             }
 804         }
 805 #endif
 806     } else
 807 #endif
 808 #ifdef __sun__
 809     /*
 810      * use the DKIOCGMEDIAINFO ioctl to read the size.
 811      */
 812     rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
 813     if ( rv != -1 ) {
 814         size = minfo.dki_lbsize * minfo.dki_capacity;
 815     } else /* there are reports that lseek on some devices
 816               fails, but irc discussion said that contingency
 817               on contingency was overkill */
 818 #endif
 819     {
 820         size = lseek(fd, 0, SEEK_END);
 821     }
 822     return size;
 823 }
 824 #endif
 825
 826 static int raw_create(const char *filename, QEMUOptionParameter *options)
 827 {
 828     int fd;
 829     int64_t total_size = 0;
 830
 831     /* Read out options */
 832     while (options && options->name) {
 833         if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
 834             total_size = options->value.n / 512;
 835         }
 836         options++;
 837     }
 838
 839     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 840               0644);
 841     if (fd < 0)
 842         return -EIO;
 843     ftruncate(fd, total_size * 512);
 844     close(fd);
 845     return 0;
 846 }
 847
 848 static void raw_flush(BlockDriverState *bs)
 849 {
 850     BDRVRawState *s = bs->opaque;
 851     fsync(s->fd);
 852 }
 853
 854
 855 static QEMUOptionParameter raw_create_options[] = {
 856     { BLOCK_OPT_SIZE,           OPT_SIZE },
 857     { NULL }
 858 };
 859
 860 static BlockDriver bdrv_raw = {
 861     .format_name = "raw",
 862     .instance_size = sizeof(BDRVRawState),
 863     .bdrv_probe = NULL, /* no probe for protocols */
 864     .bdrv_open = raw_open,
 865     .bdrv_read = raw_read,
 866     .bdrv_write = raw_write,
 867     .bdrv_close = raw_close,
 868     .bdrv_create = raw_create,
 869     .bdrv_flush = raw_flush,
 870
 871 #ifdef CONFIG_AIO
 872     .bdrv_aio_readv = raw_aio_readv,
 873     .bdrv_aio_writev = raw_aio_writev,
 874     .bdrv_aio_cancel = raw_aio_cancel,
 875     .aiocb_size = sizeof(RawAIOCB),
 876 #endif
 877
 878     .bdrv_truncate = raw_truncate,
 879     .bdrv_getlength = raw_getlength,
 880
 881     .create_options = raw_create_options,
 882 };
 883
 884 /***********************************************/
 885 /* host device */
 886
 887 #ifdef CONFIG_COCOA
 888 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
 889 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
 890
 891 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
 892 {
 893     kern_return_t       kernResult;
 894     mach_port_t     masterPort;
 895     CFMutableDictionaryRef  classesToMatch;
 896
 897     kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
 898     if ( KERN_SUCCESS != kernResult ) {
 899         printf( "IOMasterPort returned %d\n", kernResult );
 900     }
 901
 902     classesToMatch = IOServiceMatching( kIOCDMediaClass );
 903     if ( classesToMatch == NULL ) {
 904         printf( "IOServiceMatching returned a NULL dictionary.\n" );
 905     } else {
 906     CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
 907     }
 908     kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
 909     if ( KERN_SUCCESS != kernResult )
 910     {
 911         printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
 912     }
 913
 914     return kernResult;
 915 }
 916
 917 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
 918 {
 919     io_object_t     nextMedia;
 920     kern_return_t   kernResult = KERN_FAILURE;
 921     *bsdPath = '\0';
 922     nextMedia = IOIteratorNext( mediaIterator );
 923     if ( nextMedia )
 924     {
 925         CFTypeRef   bsdPathAsCFString;
 926     bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
 927         if ( bsdPathAsCFString ) {
 928             size_t devPathLength;
 929             strcpy( bsdPath, _PATH_DEV );
 930             strcat( bsdPath, "r" );
 931             devPathLength = strlen( bsdPath );
 932             if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
 933                 kernResult = KERN_SUCCESS;
 934             }
 935             CFRelease( bsdPathAsCFString );
 936         }
 937         IOObjectRelease( nextMedia );
 938     }
 939
 940     return kernResult;
 941 }
 942
 943 #endif
 944
 945 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
 946 {
 947     BDRVRawState *s = bs->opaque;
 948     int fd, open_flags, ret;
 949
 950     posix_aio_init();
 951
 952 #ifdef CONFIG_COCOA
 953     if (strstart(filename, "/dev/cdrom", NULL)) {
 954         kern_return_t kernResult;
 955         io_iterator_t mediaIterator;
 956         char bsdPath[ MAXPATHLEN ];
 957         int fd;
 958
 959         kernResult = FindEjectableCDMedia( &mediaIterator );
 960         kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
 961
 962         if ( bsdPath[ 0 ] != '\0' ) {
 963             strcat(bsdPath,"s0");
 964             /* some CDs don't have a partition 0 */
 965             fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
 966             if (fd < 0) {
 967                 bsdPath[strlen(bsdPath)-1] = '1';
 968             } else {
 969                 close(fd);
 970             }
 971             filename = bsdPath;
 972         }
 973
 974         if ( mediaIterator )
 975             IOObjectRelease( mediaIterator );
 976     }
 977 #endif
 978     open_flags = O_BINARY;
 979     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 980         open_flags |= O_RDWR;
 981     } else {
 982         open_flags |= O_RDONLY;
 983         bs->read_only = 1;
 984     }
 985     /* Use O_DSYNC for write-through caching, no flags for write-back caching,
 986      * and O_DIRECT for no caching. */
 987     if ((flags & BDRV_O_NOCACHE))
 988         open_flags |= O_DIRECT;
 989     else if (!(flags & BDRV_O_CACHE_WB))
 990         open_flags |= O_DSYNC;
 991
 992     s->type = FTYPE_FILE;
 993 #if defined(__linux__)
 994     if (strstart(filename, "/dev/cd", NULL)) {
 995         /* open will not fail even if no CD is inserted */
 996         open_flags |= O_NONBLOCK;
 997         s->type = FTYPE_CD;
 998     } else if (strstart(filename, "/dev/fd", NULL)) {
 999         s->type = FTYPE_FD;
1000         s->fd_open_flags = open_flags;
1001         /* open will not fail even if no floppy is inserted */
1002         open_flags |= O_NONBLOCK;
1003 #ifdef CONFIG_AIO
1004     } else if (strstart(filename, "/dev/sg", NULL)) {
1005         bs->sg = 1;
1006 #endif
1007     }
1008 #endif
1009 #if defined(__FreeBSD__)
1010     if (strstart(filename, "/dev/cd", NULL) ||
1011         strstart(filename, "/dev/acd", NULL)) {
1012         s->type = FTYPE_CD;
1013         s->cd_open_flags = open_flags;
1014     }
1015 #endif
1016     s->fd = -1;
1017     fd = open(filename, open_flags, 0644);
1018     if (fd < 0) {
1019         ret = -errno;
1020         if (ret == -EROFS)
1021             ret = -EACCES;
1022         return ret;
1023     }
1024     s->fd = fd;
1025 #if defined(__FreeBSD__)
1026     /* make sure the door isnt locked at this time */
1027     if (s->type == FTYPE_CD)
1028         ioctl (s->fd, CDIOCALLOW);
1029 #endif
1030 #if defined(__linux__)
1031     /* close fd so that we can reopen it as needed */
1032     if (s->type == FTYPE_FD) {
1033         close(s->fd);
1034         s->fd = -1;
1035         s->fd_media_changed = 1;
1036     }
1037 #endif
1038     return 0;
1039 }
1040
1041 #if defined(__linux__)
1042 /* Note: we do not have a reliable method to detect if the floppy is
1043    present. The current method is to try to open the floppy at every
1044    I/O and to keep it opened during a few hundreds of ms. */
1045 static int fd_open(BlockDriverState *bs)
1046 {
1047     BDRVRawState *s = bs->opaque;
1048     int last_media_present;
1049
1050     if (s->type != FTYPE_FD)
1051         return 0;
1052     last_media_present = (s->fd >= 0);
1053     if (s->fd >= 0 &&
1054         (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1055         close(s->fd);
1056         s->fd = -1;
1057 #ifdef DEBUG_FLOPPY
1058         printf("Floppy closed\n");
1059 #endif
1060     }
1061     if (s->fd < 0) {
1062         if (s->fd_got_error &&
1063             (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1064 #ifdef DEBUG_FLOPPY
1065             printf("No floppy (open delayed)\n");
1066 #endif
1067             return -EIO;
1068         }
1069         s->fd = open(bs->filename, s->fd_open_flags);
1070         if (s->fd < 0) {
1071             s->fd_error_time = qemu_get_clock(rt_clock);
1072             s->fd_got_error = 1;
1073             if (last_media_present)
1074                 s->fd_media_changed = 1;
1075 #ifdef DEBUG_FLOPPY
1076             printf("No floppy\n");
1077 #endif
1078             return -EIO;
1079         }
1080 #ifdef DEBUG_FLOPPY
1081         printf("Floppy opened\n");
1082 #endif
1083     }
1084     if (!last_media_present)
1085         s->fd_media_changed = 1;
1086     s->fd_open_time = qemu_get_clock(rt_clock);
1087     s->fd_got_error = 0;
1088     return 0;
1089 }
1090
1091 static int raw_is_inserted(BlockDriverState *bs)
1092 {
1093     BDRVRawState *s = bs->opaque;
1094     int ret;
1095
1096     switch(s->type) {
1097     case FTYPE_CD:
1098         ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1099         if (ret == CDS_DISC_OK)
1100             return 1;
1101         else
1102             return 0;
1103         break;
1104     case FTYPE_FD:
1105         ret = fd_open(bs);
1106         return (ret >= 0);
1107     default:
1108         return 1;
1109     }
1110 }
1111
1112 /* currently only used by fdc.c, but a CD version would be good too */
1113 static int raw_media_changed(BlockDriverState *bs)
1114 {
1115     BDRVRawState *s = bs->opaque;
1116
1117     switch(s->type) {
1118     case FTYPE_FD:
1119         {
1120             int ret;
1121             /* XXX: we do not have a true media changed indication. It
1122                does not work if the floppy is changed without trying
1123                to read it */
1124             fd_open(bs);
1125             ret = s->fd_media_changed;
1126             s->fd_media_changed = 0;
1127 #ifdef DEBUG_FLOPPY
1128             printf("Floppy changed=%d\n", ret);
1129 #endif
1130             return ret;
1131         }
1132     default:
1133         return -ENOTSUP;
1134     }
1135 }
1136
1137 static int raw_eject(BlockDriverState *bs, int eject_flag)
1138 {
1139     BDRVRawState *s = bs->opaque;
1140
1141     switch(s->type) {
1142     case FTYPE_CD:
1143         if (eject_flag) {
1144             if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
1145                 perror("CDROMEJECT");
1146         } else {
1147             if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
1148                 perror("CDROMEJECT");
1149         }
1150         break;
1151     case FTYPE_FD:
1152         {
1153             int fd;
1154             if (s->fd >= 0) {
1155                 close(s->fd);
1156                 s->fd = -1;
1157             }
1158             fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
1159             if (fd >= 0) {
1160                 if (ioctl(fd, FDEJECT, 0) < 0)
1161                     perror("FDEJECT");
1162                 close(fd);
1163             }
1164         }
1165         break;
1166     default:
1167         return -ENOTSUP;
1168     }
1169     return 0;
1170 }
1171
1172 static int raw_set_locked(BlockDriverState *bs, int locked)
1173 {
1174     BDRVRawState *s = bs->opaque;
1175
1176     switch(s->type) {
1177     case FTYPE_CD:
1178         if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
1179             /* Note: an error can happen if the distribution automatically
1180                mounts the CD-ROM */
1181             //        perror("CDROM_LOCKDOOR");
1182         }
1183         break;
1184     default:
1185         return -ENOTSUP;
1186     }
1187     return 0;
1188 }
1189
1190 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1191 {
1192     BDRVRawState *s = bs->opaque;
1193
1194     return ioctl(s->fd, req, buf);
1195 }
1196
1197 #ifdef CONFIG_AIO
1198 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
1199         unsigned long int req, void *buf,
1200         BlockDriverCompletionFunc *cb, void *opaque)
1201 {
1202     BDRVRawState *s = bs->opaque;
1203     RawAIOCB *acb;
1204
1205     if (fd_open(bs) < 0)
1206         return NULL;
1207
1208     acb = qemu_aio_get(bs, cb, opaque);
1209     if (!acb)
1210         return NULL;
1211     acb->aiocb.aio_fildes = s->fd;
1212     acb->aiocb.ev_signo = SIGUSR2;
1213     acb->aiocb.aio_offset = 0;
1214     acb->aiocb.aio_flags = 0;
1215
1216     acb->next = posix_aio_state->first_aio;
1217     posix_aio_state->first_aio = acb;
1218
1219     acb->aiocb.aio_ioctl_buf = buf;
1220     acb->aiocb.aio_ioctl_cmd = req;
1221     if (qemu_paio_ioctl(&acb->aiocb) < 0) {
1222         raw_aio_remove(acb);
1223         return NULL;
1224     }
1225
1226     return &acb->common;
1227 }
1228 #endif
1229
1230 #elif defined(__FreeBSD__)
1231
1232 static int fd_open(BlockDriverState *bs)
1233 {
1234     BDRVRawState *s = bs->opaque;
1235
1236     /* this is just to ensure s->fd is sane (its called by io ops) */
1237     if (s->fd >= 0)
1238         return 0;
1239     return -EIO;
1240 }
1241
1242 static int cd_open(BlockDriverState *bs)
1243 {
1244 #if defined(__FreeBSD__)
1245     BDRVRawState *s = bs->opaque;
1246     int fd;
1247
1248     switch(s->type) {
1249     case FTYPE_CD:
1250         /* XXX force reread of possibly changed/newly loaded disc,
1251          * FreeBSD seems to not notice sometimes... */
1252         if (s->fd >= 0)
1253             close (s->fd);
1254         fd = open(bs->filename, s->cd_open_flags, 0644);
1255         if (fd < 0) {
1256             s->fd = -1;
1257             return -EIO;
1258         }
1259         s->fd = fd;
1260         /* make sure the door isnt locked at this time */
1261         ioctl (s->fd, CDIOCALLOW);
1262     }
1263 #endif
1264     return 0;
1265 }
1266
1267 static int raw_is_inserted(BlockDriverState *bs)
1268 {
1269     BDRVRawState *s = bs->opaque;
1270
1271     switch(s->type) {
1272     case FTYPE_CD:
1273         return (raw_getlength(bs) > 0);
1274     case FTYPE_FD:
1275         /* XXX handle this */
1276         /* FALLTHRU */
1277     default:
1278         return 1;
1279     }
1280 }
1281
1282 static int raw_media_changed(BlockDriverState *bs)
1283 {
1284     return -ENOTSUP;
1285 }
1286
1287 static int raw_eject(BlockDriverState *bs, int eject_flag)
1288 {
1289     BDRVRawState *s = bs->opaque;
1290
1291     switch(s->type) {
1292     case FTYPE_CD:
1293         if (s->fd < 0)
1294             return -ENOTSUP;
1295         (void) ioctl (s->fd, CDIOCALLOW);
1296         if (eject_flag) {
1297             if (ioctl (s->fd, CDIOCEJECT) < 0)
1298                 perror("CDIOCEJECT");
1299         } else {
1300             if (ioctl (s->fd, CDIOCCLOSE) < 0)
1301                 perror("CDIOCCLOSE");
1302         }
1303         if (cd_open(bs) < 0)
1304             return -ENOTSUP;
1305         break;
1306     case FTYPE_FD:
1307         /* XXX handle this */
1308         /* FALLTHRU */
1309     default:
1310         return -ENOTSUP;
1311     }
1312     return 0;
1313 }
1314
1315 static int raw_set_locked(BlockDriverState *bs, int locked)
1316 {
1317     BDRVRawState *s = bs->opaque;
1318
1319     switch(s->type) {
1320     case FTYPE_CD:
1321         if (s->fd < 0)
1322             return -ENOTSUP;
1323         if (ioctl (s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1324             /* Note: an error can happen if the distribution automatically
1325                mounts the CD-ROM */
1326             //        perror("CDROM_LOCKDOOR");
1327         }
1328         break;
1329     default:
1330         return -ENOTSUP;
1331     }
1332     return 0;
1333 }
1334
1335 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1336 {
1337     return -ENOTSUP;
1338 }
1339 #else /* !linux && !FreeBSD */
1340
1341 static int fd_open(BlockDriverState *bs)
1342 {
1343     return 0;
1344 }
1345
1346 static int raw_is_inserted(BlockDriverState *bs)
1347 {
1348     return 1;
1349 }
1350
1351 static int raw_media_changed(BlockDriverState *bs)
1352 {
1353     return -ENOTSUP;
1354 }
1355
1356 static int raw_eject(BlockDriverState *bs, int eject_flag)
1357 {
1358     return -ENOTSUP;
1359 }
1360
1361 static int raw_set_locked(BlockDriverState *bs, int locked)
1362 {
1363     return -ENOTSUP;
1364 }
1365
1366 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1367 {
1368     return -ENOTSUP;
1369 }
1370
1371 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
1372         unsigned long int req, void *buf,
1373         BlockDriverCompletionFunc *cb, void *opaque)
1374 {
1375     return NULL;
1376 }
1377 #endif /* !linux && !FreeBSD */
1378
1379 #if defined(__linux__) || defined(__FreeBSD__)
1380 static int hdev_create(const char *filename, QEMUOptionParameter *options)
1381 {
1382     int fd;
1383     int ret = 0;
1384     struct stat stat_buf;
1385     int64_t total_size = 0;
1386
1387     /* Read out options */
1388     while (options && options->name) {
1389         if (!strcmp(options->name, "size")) {
1390             total_size = options->value.n / 512;
1391         }
1392         options++;
1393     }
1394
1395     fd = open(filename, O_WRONLY | O_BINARY);
1396     if (fd < 0)
1397         return -EIO;
1398
1399     if (fstat(fd, &stat_buf) < 0)
1400         ret = -EIO;
1401     else if (!S_ISBLK(stat_buf.st_mode))
1402         ret = -EIO;
1403     else if (lseek(fd, 0, SEEK_END) < total_size * 512)
1404         ret = -ENOSPC;
1405
1406     close(fd);
1407     return ret;
1408 }
1409
1410 #else  /* !(linux || freebsd) */
1411
1412 static int hdev_create(const char *filename, QEMUOptionParameter *options)
1413 {
1414     return -ENOTSUP;
1415 }
1416 #endif
1417
1418 static BlockDriver bdrv_host_device = {
1419     .format_name        = "host_device",
1420     .instance_size      = sizeof(BDRVRawState),
1421     .bdrv_open          = hdev_open,
1422     .bdrv_close         = raw_close,
1423     .bdrv_create        = hdev_create,
1424     .bdrv_flush         = raw_flush,
1425
1426 #ifdef CONFIG_AIO
1427     .bdrv_aio_readv     = raw_aio_readv,
1428     .bdrv_aio_writev    = raw_aio_writev,
1429     .bdrv_aio_cancel    = raw_aio_cancel,
1430     .aiocb_size         = sizeof(RawAIOCB),
1431 #endif
1432
1433     .bdrv_read          = raw_read,
1434     .bdrv_write         = raw_write,
1435     .bdrv_getlength     = raw_getlength,
1436
1437     /* removable device support */
1438     .bdrv_is_inserted   = raw_is_inserted,
1439     .bdrv_media_changed = raw_media_changed,
1440     .bdrv_eject         = raw_eject,
1441     .bdrv_set_locked    = raw_set_locked,
1442     /* generic scsi device */
1443     .bdrv_ioctl         = raw_ioctl,
1444 #ifdef CONFIG_AIO
1445     .bdrv_aio_ioctl     = raw_aio_ioctl,
1446 #endif
1447 };
1448
1449 static void bdrv_raw_init(void)
1450 {
1451     bdrv_register(&bdrv_raw);
1452     bdrv_register(&bdrv_host_device);
1453 }
1454
1455 block_init(bdrv_raw_init);