block-raw.c

   1 /*
   2  * Block driver for RAW files
   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 "vl.h"
  25 #include "block_int.h"
  26 #include <assert.h>
  27 #ifndef _WIN32
  28 #include <aio.h>
  29
  30 #ifndef QEMU_TOOL
  31 #include "exec-all.h"
  32 #endif
  33
  34 #ifdef CONFIG_COCOA
  35 #include <paths.h>
  36 #include <sys/param.h>
  37 #include <IOKit/IOKitLib.h>
  38 #include <IOKit/IOBSD.h>
  39 #include <IOKit/storage/IOMediaBSDClient.h>
  40 #include <IOKit/storage/IOMedia.h>
  41 #include <IOKit/storage/IOCDMedia.h>
  42 //#include <IOKit/storage/IOCDTypes.h>
  43 #include <CoreFoundation/CoreFoundation.h>
  44 #endif
  45
  46 #ifdef __sun__
  47 #include <sys/dkio.h>
  48 #endif
  49
  50 typedef struct BDRVRawState {
  51     int fd;
  52 } BDRVRawState;
  53
  54 #ifdef CONFIG_COCOA
  55 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
  56 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
  57
  58 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
  59 {
  60     kern_return_t       kernResult;
  61     mach_port_t     masterPort;
  62     CFMutableDictionaryRef  classesToMatch;
  63
  64     kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
  65     if ( KERN_SUCCESS != kernResult ) {
  66         printf( "IOMasterPort returned %d\n", kernResult );
  67     }
  68
  69     classesToMatch = IOServiceMatching( kIOCDMediaClass );
  70     if ( classesToMatch == NULL ) {
  71         printf( "IOServiceMatching returned a NULL dictionary.\n" );
  72     } else {
  73     CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
  74     }
  75     kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
  76     if ( KERN_SUCCESS != kernResult )
  77     {
  78         printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
  79     }
  80
  81     return kernResult;
  82 }
  83
  84 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
  85 {
  86     io_object_t     nextMedia;
  87     kern_return_t   kernResult = KERN_FAILURE;
  88     *bsdPath = '\0';
  89     nextMedia = IOIteratorNext( mediaIterator );
  90     if ( nextMedia )
  91     {
  92         CFTypeRef   bsdPathAsCFString;
  93     bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
  94         if ( bsdPathAsCFString ) {
  95             size_t devPathLength;
  96             strcpy( bsdPath, _PATH_DEV );
  97             strcat( bsdPath, "r" );
  98             devPathLength = strlen( bsdPath );
  99             if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
 100                 kernResult = KERN_SUCCESS;
 101             }
 102             CFRelease( bsdPathAsCFString );
 103         }
 104         IOObjectRelease( nextMedia );
 105     }
 106
 107     return kernResult;
 108 }
 109
 110 #endif
 111
 112 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 113 {
 114     BDRVRawState *s = bs->opaque;
 115     int fd, open_flags;
 116
 117 #ifdef CONFIG_COCOA
 118     if (strstart(filename, "/dev/cdrom", NULL)) {
 119         kern_return_t kernResult;
 120         io_iterator_t mediaIterator;
 121         char bsdPath[ MAXPATHLEN ];
 122         int fd;
 123
 124         kernResult = FindEjectableCDMedia( &mediaIterator );
 125         kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
 126
 127         if ( bsdPath[ 0 ] != '\0' ) {
 128             strcat(bsdPath,"s0");
 129             /* some CDs don't have a partition 0 */
 130             fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
 131             if (fd < 0) {
 132                 bsdPath[strlen(bsdPath)-1] = '1';
 133             } else {
 134                 close(fd);
 135             }
 136             filename = bsdPath;
 137         }
 138
 139         if ( mediaIterator )
 140             IOObjectRelease( mediaIterator );
 141     }
 142 #endif
 143     open_flags = O_BINARY;
 144     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 145         open_flags |= O_RDWR;
 146     } else {
 147         open_flags |= O_RDONLY;
 148         bs->read_only = 1;
 149     }
 150     if (flags & BDRV_O_CREAT)
 151         open_flags |= O_CREAT | O_TRUNC;
 152
 153     fd = open(filename, open_flags, 0644);
 154     if (fd < 0)
 155         return -errno;
 156     s->fd = fd;
 157     return 0;
 158 }
 159
 160 /* XXX: use host sector size if necessary with:
 161 #ifdef DIOCGSECTORSIZE
 162         {
 163             unsigned int sectorsize = 512;
 164             if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
 165                 sectorsize > bufsize)
 166                 bufsize = sectorsize;
 167         }
 168 #endif
 169 #ifdef CONFIG_COCOA
 170         u_int32_t   blockSize = 512;
 171         if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
 172             bufsize = blockSize;
 173         }
 174 #endif
 175 */
 176
 177 static int raw_pread(BlockDriverState *bs, int64_t offset,
 178                      uint8_t *buf, int count)
 179 {
 180     BDRVRawState *s = bs->opaque;
 181     int ret;
 182
 183     lseek(s->fd, offset, SEEK_SET);
 184     ret = read(s->fd, buf, count);
 185     return ret;
 186 }
 187
 188 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 189                       const uint8_t *buf, int count)
 190 {
 191     BDRVRawState *s = bs->opaque;
 192     int ret;
 193
 194     lseek(s->fd, offset, SEEK_SET);
 195     ret = write(s->fd, buf, count);
 196     return ret;
 197 }
 198
 199 /***********************************************************/
 200 /* Unix AOP using POSIX AIO */
 201
 202 typedef struct RawAIOCB {
 203     struct aiocb aiocb;
 204     int busy; /* only used for debugging */
 205     BlockDriverAIOCB *next;
 206 } RawAIOCB;
 207
 208 static int aio_sig_num = SIGUSR2;
 209 static BlockDriverAIOCB *first_aio; /* AIO issued */
 210 static int aio_initialized = 0;
 211
 212 static void aio_signal_handler(int signum)
 213 {
 214 #ifndef QEMU_TOOL
 215     CPUState *env = cpu_single_env;
 216     if (env) {
 217         /* stop the currently executing cpu because a timer occured */
 218         cpu_interrupt(env, CPU_INTERRUPT_EXIT);
 219 #ifdef USE_KQEMU
 220         if (env->kqemu_enabled) {
 221             kqemu_cpu_interrupt(env);
 222         }
 223 #endif
 224     }
 225 #endif
 226 }
 227
 228 void qemu_aio_init(void)
 229 {
 230     struct sigaction act;
 231
 232     aio_initialized = 1;
 233
 234     sigfillset(&act.sa_mask);
 235     act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
 236     act.sa_handler = aio_signal_handler;
 237     sigaction(aio_sig_num, &act, NULL);
 238
 239     {
 240         /* XXX: aio thread exit seems to hang on RH 9 */
 241         struct aioinit ai;
 242         memset(&ai, 0, sizeof(ai));
 243         ai.aio_threads = 2;
 244         ai.aio_num = 1;
 245         ai.aio_idle_time = 365 * 100000;
 246         aio_init(&ai);
 247     }
 248 }
 249
 250 void qemu_aio_poll(void)
 251 {
 252     BlockDriverAIOCB *acb, **pacb;
 253     RawAIOCB *acb1;
 254     int ret;
 255
 256     for(;;) {
 257         pacb = &first_aio;
 258         for(;;) {
 259             acb = *pacb;
 260             if (!acb)
 261                 goto the_end;
 262             acb1 = acb->opaque;
 263             ret = aio_error(&acb1->aiocb);
 264             if (ret == ECANCELED) {
 265                 /* remove the request */
 266                 acb1->busy = 0;
 267                 *pacb = acb1->next;
 268             } else if (ret != EINPROGRESS) {
 269                 /* end of aio */
 270                 if (ret == 0) {
 271                     ret = aio_return(&acb1->aiocb);
 272                     if (ret == acb1->aiocb.aio_nbytes)
 273                         ret = 0;
 274                     else
 275                         ret = -1;
 276                 } else {
 277                     ret = -ret;
 278                 }
 279                 /* remove the request */
 280                 acb1->busy = 0;
 281                 *pacb = acb1->next;
 282                 /* call the callback */
 283                 acb->cb(acb->cb_opaque, ret);
 284                 break;
 285             } else {
 286                 pacb = &acb1->next;
 287             }
 288         }
 289     }
 290  the_end: ;
 291 }
 292
 293 /* wait until at least one AIO was handled */
 294 static sigset_t wait_oset;
 295
 296 void qemu_aio_wait_start(void)
 297 {
 298     sigset_t set;
 299
 300     if (!aio_initialized)
 301         qemu_aio_init();
 302     sigemptyset(&set);
 303     sigaddset(&set, aio_sig_num);
 304     sigprocmask(SIG_BLOCK, &set, &wait_oset);
 305 }
 306
 307 void qemu_aio_wait(void)
 308 {
 309     sigset_t set;
 310     int nb_sigs;
 311
 312 #ifndef QEMU_TOOL
 313     if (qemu_bh_poll())
 314         return;
 315 #endif
 316     sigemptyset(&set);
 317     sigaddset(&set, aio_sig_num);
 318     sigwait(&set, &nb_sigs);
 319     qemu_aio_poll();
 320 }
 321
 322 void qemu_aio_wait_end(void)
 323 {
 324     sigprocmask(SIG_SETMASK, &wait_oset, NULL);
 325 }
 326
 327 static int raw_aio_new(BlockDriverAIOCB *acb)
 328 {
 329     RawAIOCB *acb1;
 330     BDRVRawState *s = acb->bs->opaque;
 331
 332     acb1 = qemu_mallocz(sizeof(RawAIOCB));
 333     if (!acb1)
 334         return -1;
 335     acb->opaque = acb1;
 336     acb1->aiocb.aio_fildes = s->fd;
 337     acb1->aiocb.aio_sigevent.sigev_signo = aio_sig_num;
 338     acb1->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
 339     return 0;
 340 }
 341
 342 static int raw_aio_read(BlockDriverAIOCB *acb, int64_t sector_num,
 343                         uint8_t *buf, int nb_sectors)
 344 {
 345     RawAIOCB *acb1 = acb->opaque;
 346
 347     assert(acb1->busy == 0);
 348     acb1->busy = 1;
 349     acb1->aiocb.aio_buf = buf;
 350     acb1->aiocb.aio_nbytes = nb_sectors * 512;
 351     acb1->aiocb.aio_offset = sector_num * 512;
 352     acb1->next = first_aio;
 353     first_aio = acb;
 354     if (aio_read(&acb1->aiocb) < 0) {
 355         acb1->busy = 0;
 356         return -errno;
 357     }
 358     return 0;
 359 }
 360
 361 static int raw_aio_write(BlockDriverAIOCB *acb, int64_t sector_num,
 362                          const uint8_t *buf, int nb_sectors)
 363 {
 364     RawAIOCB *acb1 = acb->opaque;
 365
 366     assert(acb1->busy == 0);
 367     acb1->busy = 1;
 368     acb1->aiocb.aio_buf = (uint8_t *)buf;
 369     acb1->aiocb.aio_nbytes = nb_sectors * 512;
 370     acb1->aiocb.aio_offset = sector_num * 512;
 371     acb1->next = first_aio;
 372     first_aio = acb;
 373     if (aio_write(&acb1->aiocb) < 0) {
 374         acb1->busy = 0;
 375         return -errno;
 376     }
 377     return 0;
 378 }
 379
 380 static void raw_aio_cancel(BlockDriverAIOCB *acb)
 381 {
 382     RawAIOCB *acb1 = acb->opaque;
 383     int ret;
 384     BlockDriverAIOCB **pacb;
 385
 386     ret = aio_cancel(acb1->aiocb.aio_fildes, &acb1->aiocb);
 387     if (ret == AIO_NOTCANCELED) {
 388         /* fail safe: if the aio could not be canceled, we wait for
 389            it */
 390         while (aio_error(&acb1->aiocb) == EINPROGRESS);
 391     }
 392
 393     /* remove the callback from the queue */
 394     pacb = &first_aio;
 395     for(;;) {
 396         if (*pacb == NULL) {
 397             break;
 398         } else if (*pacb == acb) {
 399             acb1->busy = 0;
 400             *pacb = acb1->next;
 401             break;
 402         }
 403         acb1 = (*pacb)->opaque;
 404         pacb = &acb1->next;
 405     }
 406 }
 407
 408 static void raw_aio_delete(BlockDriverAIOCB *acb)
 409 {
 410     RawAIOCB *acb1 = acb->opaque;
 411     raw_aio_cancel(acb);
 412     qemu_free(acb1);
 413 }
 414
 415 static void raw_close(BlockDriverState *bs)
 416 {
 417     BDRVRawState *s = bs->opaque;
 418     close(s->fd);
 419 }
 420
 421 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 422 {
 423     BDRVRawState *s = bs->opaque;
 424     if (ftruncate(s->fd, offset) < 0)
 425         return -errno;
 426     return 0;
 427 }
 428
 429 static int64_t  raw_getlength(BlockDriverState *bs)
 430 {
 431     BDRVRawState *s = bs->opaque;
 432     int fd = s->fd;
 433     int64_t size;
 434 #ifdef _BSD
 435     struct stat sb;
 436 #endif
 437 #ifdef __sun__
 438     struct dk_minfo minfo;
 439     int rv;
 440 #endif
 441
 442 #ifdef _BSD
 443     if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
 444 #ifdef DIOCGMEDIASIZE
 445         if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
 446 #endif
 447 #ifdef CONFIG_COCOA
 448         size = LONG_LONG_MAX;
 449 #else
 450         size = lseek(fd, 0LL, SEEK_END);
 451 #endif
 452     } else
 453 #endif
 454 #ifdef __sun__
 455     /*
 456      * use the DKIOCGMEDIAINFO ioctl to read the size.
 457      */
 458     rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
 459     if ( rv != -1 ) {
 460         size = minfo.dki_lbsize * minfo.dki_capacity;
 461     } else /* there are reports that lseek on some devices
 462               fails, but irc discussion said that contingency
 463               on contingency was overkill */
 464 #endif
 465     {
 466         size = lseek(fd, 0, SEEK_END);
 467     }
 468 #ifdef _WIN32
 469     /* On Windows hosts it can happen that we're unable to get file size
 470        for CD-ROM raw device (it's inherent limitation of the CDFS driver). */
 471     if (size == -1)
 472         size = LONG_LONG_MAX;
 473 #endif
 474     return size;
 475 }
 476
 477 static int raw_create(const char *filename, int64_t total_size,
 478                       const char *backing_file, int flags)
 479 {
 480     int fd;
 481
 482     if (flags || backing_file)
 483         return -ENOTSUP;
 484
 485     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 486               0644);
 487     if (fd < 0)
 488         return -EIO;
 489     ftruncate(fd, total_size * 512);
 490     close(fd);
 491     return 0;
 492 }
 493
 494 static void raw_flush(BlockDriverState *bs)
 495 {
 496     BDRVRawState *s = bs->opaque;
 497     fsync(s->fd);
 498 }
 499
 500 BlockDriver bdrv_raw = {
 501     "raw",
 502     sizeof(BDRVRawState),
 503     NULL, /* no probe for protocols */
 504     raw_open,
 505     NULL,
 506     NULL,
 507     raw_close,
 508     raw_create,
 509     raw_flush,
 510
 511     .bdrv_aio_new = raw_aio_new,
 512     .bdrv_aio_read = raw_aio_read,
 513     .bdrv_aio_write = raw_aio_write,
 514     .bdrv_aio_cancel = raw_aio_cancel,
 515     .bdrv_aio_delete = raw_aio_delete,
 516     .protocol_name = "file",
 517     .bdrv_pread = raw_pread,
 518     .bdrv_pwrite = raw_pwrite,
 519     .bdrv_truncate = raw_truncate,
 520     .bdrv_getlength = raw_getlength,
 521 };
 522
 523 #else /* _WIN32 */
 524
 525 /* XXX: use another file ? */
 526 #include <winioctl.h>
 527
 528 typedef struct BDRVRawState {
 529     HANDLE hfile;
 530 } BDRVRawState;
 531
 532 typedef struct RawAIOCB {
 533     HANDLE hEvent;
 534     OVERLAPPED ov;
 535     int count;
 536 } RawAIOCB;
 537
 538 int qemu_ftruncate64(int fd, int64_t length)
 539 {
 540     LARGE_INTEGER li;
 541     LONG high;
 542     HANDLE h;
 543     BOOL res;
 544
 545     if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
 546         return -1;
 547
 548     h = (HANDLE)_get_osfhandle(fd);
 549
 550     /* get current position, ftruncate do not change position */
 551     li.HighPart = 0;
 552     li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
 553     if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
 554         return -1;
 555
 556     high = length >> 32;
 557     if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
 558         return -1;
 559     res = SetEndOfFile(h);
 560
 561     /* back to old position */
 562     SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
 563     return res ? 0 : -1;
 564 }
 565
 566 static int set_sparse(int fd)
 567 {
 568     DWORD returned;
 569     return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
 570                                  NULL, 0, NULL, 0, &returned, NULL);
 571 }
 572
 573 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 574 {
 575     BDRVRawState *s = bs->opaque;
 576     int access_flags, create_flags;
 577
 578     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 579         access_flags = GENERIC_READ | GENERIC_WRITE;
 580     } else {
 581         access_flags = GENERIC_READ;
 582     }
 583     if (flags & BDRV_O_CREAT) {
 584         create_flags = CREATE_ALWAYS;
 585     } else {
 586         create_flags = OPEN_EXISTING;
 587     }
 588     s->hfile = CreateFile(filename, access_flags,
 589                           FILE_SHARE_READ, NULL,
 590                           create_flags, FILE_FLAG_OVERLAPPED, 0);
 591     if (s->hfile == INVALID_HANDLE_VALUE)
 592         return -1;
 593     return 0;
 594 }
 595
 596 static int raw_pread(BlockDriverState *bs, int64_t offset,
 597                      uint8_t *buf, int count)
 598 {
 599     BDRVRawState *s = bs->opaque;
 600     OVERLAPPED ov;
 601     DWORD ret_count;
 602     int ret;
 603
 604     memset(&ov, 0, sizeof(ov));
 605     ov.Offset = offset;
 606     ov.OffsetHigh = offset >> 32;
 607     ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
 608     if (!ret) {
 609         ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
 610         if (!ret)
 611             return -EIO;
 612         else
 613             return ret_count;
 614     }
 615     return ret_count;
 616 }
 617
 618 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 619                       const uint8_t *buf, int count)
 620 {
 621     BDRVRawState *s = bs->opaque;
 622     OVERLAPPED ov;
 623     DWORD ret_count;
 624     int ret;
 625
 626     memset(&ov, 0, sizeof(ov));
 627     ov.Offset = offset;
 628     ov.OffsetHigh = offset >> 32;
 629     ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
 630     if (!ret) {
 631         ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
 632         if (!ret)
 633             return -EIO;
 634         else
 635             return ret_count;
 636     }
 637     return ret_count;
 638 }
 639
 640 static int raw_aio_new(BlockDriverAIOCB *acb)
 641 {
 642     RawAIOCB *acb1;
 643
 644     acb1 = qemu_mallocz(sizeof(RawAIOCB));
 645     if (!acb1)
 646         return -ENOMEM;
 647     acb->opaque = acb1;
 648     acb1->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 649     if (!acb1->hEvent)
 650         return -ENOMEM;
 651     return 0;
 652 }
 653 #ifndef QEMU_TOOL
 654 static void raw_aio_cb(void *opaque)
 655 {
 656     BlockDriverAIOCB *acb = opaque;
 657     BlockDriverState *bs = acb->bs;
 658     BDRVRawState *s = bs->opaque;
 659     RawAIOCB *acb1 = acb->opaque;
 660     DWORD ret_count;
 661     int ret;
 662
 663     ret = GetOverlappedResult(s->hfile, &acb1->ov, &ret_count, TRUE);
 664     if (!ret || ret_count != acb1->count) {
 665         acb->cb(acb->cb_opaque, -EIO);
 666     } else {
 667         acb->cb(acb->cb_opaque, 0);
 668     }
 669 }
 670 #endif
 671 static int raw_aio_read(BlockDriverAIOCB *acb, int64_t sector_num,
 672                         uint8_t *buf, int nb_sectors)
 673 {
 674     BlockDriverState *bs = acb->bs;
 675     BDRVRawState *s = bs->opaque;
 676     RawAIOCB *acb1 = acb->opaque;
 677     int ret;
 678     int64_t offset;
 679
 680     memset(&acb1->ov, 0, sizeof(acb1->ov));
 681     offset = sector_num * 512;
 682     acb1->ov.Offset = offset;
 683     acb1->ov.OffsetHigh = offset >> 32;
 684     acb1->ov.hEvent = acb1->hEvent;
 685     acb1->count = nb_sectors * 512;
 686 #ifndef QEMU_TOOL
 687     qemu_add_wait_object(acb1->ov.hEvent, raw_aio_cb, acb);
 688 #endif
 689     ret = ReadFile(s->hfile, buf, acb1->count, NULL, &acb1->ov);
 690     if (!ret)
 691         return -EIO;
 692     return 0;
 693 }
 694
 695 static int raw_aio_write(BlockDriverAIOCB *acb, int64_t sector_num,
 696                          uint8_t *buf, int nb_sectors)
 697 {
 698     BlockDriverState *bs = acb->bs;
 699     BDRVRawState *s = bs->opaque;
 700     RawAIOCB *acb1 = acb->opaque;
 701     int ret;
 702     int64_t offset;
 703
 704     memset(&acb1->ov, 0, sizeof(acb1->ov));
 705     offset = sector_num * 512;
 706     acb1->ov.Offset = offset;
 707     acb1->ov.OffsetHigh = offset >> 32;
 708     acb1->ov.hEvent = acb1->hEvent;
 709     acb1->count = nb_sectors * 512;
 710 #ifndef QEMU_TOOL
 711     qemu_add_wait_object(acb1->ov.hEvent, raw_aio_cb, acb);
 712 #endif
 713     ret = ReadFile(s->hfile, buf, acb1->count, NULL, &acb1->ov);
 714     if (!ret)
 715         return -EIO;
 716     return 0;
 717 }
 718
 719 static void raw_aio_cancel(BlockDriverAIOCB *acb)
 720 {
 721     BlockDriverState *bs = acb->bs;
 722     BDRVRawState *s = bs->opaque;
 723 #ifndef QEMU_TOOL
 724     RawAIOCB *acb1 = acb->opaque;
 725
 726     qemu_del_wait_object(acb1->ov.hEvent, raw_aio_cb, acb);
 727 #endif
 728     /* XXX: if more than one async I/O it is not correct */
 729     CancelIo(s->hfile);
 730 }
 731
 732 static void raw_aio_delete(BlockDriverAIOCB *acb)
 733 {
 734     RawAIOCB *acb1 = acb->opaque;
 735     raw_aio_cancel(acb);
 736     CloseHandle(acb1->hEvent);
 737     qemu_free(acb1);
 738 }
 739
 740 static void raw_flush(BlockDriverState *bs)
 741 {
 742     /* XXX: add it */
 743 }
 744
 745 static void raw_close(BlockDriverState *bs)
 746 {
 747     BDRVRawState *s = bs->opaque;
 748     CloseHandle(s->hfile);
 749 }
 750
 751 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 752 {
 753     BDRVRawState *s = bs->opaque;
 754     DWORD low, high;
 755
 756     low = offset;
 757     high = offset >> 32;
 758     if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
 759         return -EIO;
 760     if (!SetEndOfFile(s->hfile))
 761         return -EIO;
 762     return 0;
 763 }
 764
 765 static int64_t  raw_getlength(BlockDriverState *bs)
 766 {
 767     BDRVRawState *s = bs->opaque;
 768     LARGE_INTEGER l;
 769
 770     l.LowPart = GetFileSize(s->hfile, &l.HighPart);
 771     if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
 772         return -EIO;
 773     return l.QuadPart;
 774 }
 775
 776 static int raw_create(const char *filename, int64_t total_size,
 777                       const char *backing_file, int flags)
 778 {
 779     int fd;
 780
 781     if (flags || backing_file)
 782         return -ENOTSUP;
 783
 784     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 785               0644);
 786     if (fd < 0)
 787         return -EIO;
 788     set_sparse(fd);
 789     ftruncate(fd, total_size * 512);
 790     close(fd);
 791     return 0;
 792 }
 793
 794 void qemu_aio_init(void)
 795 {
 796 }
 797
 798 void qemu_aio_poll(void)
 799 {
 800 }
 801
 802 void qemu_aio_wait_start(void)
 803 {
 804 }
 805
 806 void qemu_aio_wait(void)
 807 {
 808 }
 809
 810 void qemu_aio_wait_end(void)
 811 {
 812 }
 813
 814 BlockDriver bdrv_raw = {
 815     "raw",
 816     sizeof(BDRVRawState),
 817     NULL, /* no probe for protocols */
 818     raw_open,
 819     NULL,
 820     NULL,
 821     raw_close,
 822     raw_create,
 823     raw_flush,
 824
 825 #if 0
 826     .bdrv_aio_new = raw_aio_new,
 827     .bdrv_aio_read = raw_aio_read,
 828     .bdrv_aio_write = raw_aio_write,
 829     .bdrv_aio_cancel = raw_aio_cancel,
 830     .bdrv_aio_delete = raw_aio_delete,
 831 #endif
 832     .protocol_name = "file",
 833     .bdrv_pread = raw_pread,
 834     .bdrv_pwrite = raw_pwrite,
 835     .bdrv_truncate = raw_truncate,
 836     .bdrv_getlength = raw_getlength,
 837 };
 838 #endif /* _WIN32 */