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     BlockDriverAIOCB common;
 204     struct aiocb aiocb;
 205     struct RawAIOCB *next;
 206 } RawAIOCB;
 207
 208 static int aio_sig_num = SIGUSR2;
 209 static RawAIOCB *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     RawAIOCB *acb, **pacb;
 253     int ret;
 254
 255     for(;;) {
 256         pacb = &first_aio;
 257         for(;;) {
 258             acb = *pacb;
 259             if (!acb)
 260                 goto the_end;
 261             ret = aio_error(&acb->aiocb);
 262             if (ret == ECANCELED) {
 263                 /* remove the request */
 264                 *pacb = acb->next;
 265                 qemu_aio_release(acb);
 266             } else if (ret != EINPROGRESS) {
 267                 /* end of aio */
 268                 if (ret == 0) {
 269                     ret = aio_return(&acb->aiocb);
 270                     if (ret == acb->aiocb.aio_nbytes)
 271                         ret = 0;
 272                     else
 273                         ret = -1;
 274                 } else {
 275                     ret = -ret;
 276                 }
 277                 /* remove the request */
 278                 *pacb = acb->next;
 279                 /* call the callback */
 280                 acb->common.cb(acb->common.opaque, ret);
 281                 qemu_aio_release(acb);
 282                 break;
 283             } else {
 284                 pacb = &acb->next;
 285             }
 286         }
 287     }
 288  the_end: ;
 289 }
 290
 291 /* wait until at least one AIO was handled */
 292 static sigset_t wait_oset;
 293
 294 void qemu_aio_wait_start(void)
 295 {
 296     sigset_t set;
 297
 298     if (!aio_initialized)
 299         qemu_aio_init();
 300     sigemptyset(&set);
 301     sigaddset(&set, aio_sig_num);
 302     sigprocmask(SIG_BLOCK, &set, &wait_oset);
 303 }
 304
 305 void qemu_aio_wait(void)
 306 {
 307     sigset_t set;
 308     int nb_sigs;
 309
 310 #ifndef QEMU_TOOL
 311     if (qemu_bh_poll())
 312         return;
 313 #endif
 314     sigemptyset(&set);
 315     sigaddset(&set, aio_sig_num);
 316     sigwait(&set, &nb_sigs);
 317     qemu_aio_poll();
 318 }
 319
 320 void qemu_aio_wait_end(void)
 321 {
 322     sigprocmask(SIG_SETMASK, &wait_oset, NULL);
 323 }
 324
 325 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
 326         int64_t sector_num, uint8_t *buf, int nb_sectors,
 327         BlockDriverCompletionFunc *cb, void *opaque)
 328 {
 329     BDRVRawState *s = bs->opaque;
 330     RawAIOCB *acb;
 331
 332     acb = qemu_aio_get(bs, cb, opaque);
 333     if (!acb)
 334         return NULL;
 335     acb->aiocb.aio_fildes = s->fd;
 336     acb->aiocb.aio_sigevent.sigev_signo = aio_sig_num;
 337     acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
 338     acb->aiocb.aio_buf = buf;
 339     acb->aiocb.aio_nbytes = nb_sectors * 512;
 340     acb->aiocb.aio_offset = sector_num * 512;
 341     acb->next = first_aio;
 342     first_aio = acb;
 343     return acb;
 344 }
 345
 346 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
 347         int64_t sector_num, uint8_t *buf, int nb_sectors,
 348         BlockDriverCompletionFunc *cb, void *opaque)
 349 {
 350     RawAIOCB *acb;
 351
 352     acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
 353     if (!acb)
 354         return NULL;
 355     if (aio_read(&acb->aiocb) < 0) {
 356         qemu_aio_release(acb);
 357         return NULL;
 358     }
 359     return &acb->common;
 360 }
 361
 362 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
 363         int64_t sector_num, const uint8_t *buf, int nb_sectors,
 364         BlockDriverCompletionFunc *cb, void *opaque)
 365 {
 366     RawAIOCB *acb;
 367
 368     acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque);
 369     if (!acb)
 370         return NULL;
 371     if (aio_write(&acb->aiocb) < 0) {
 372         qemu_aio_release(acb);
 373         return NULL;
 374     }
 375     return &acb->common;
 376 }
 377
 378 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
 379 {
 380     int ret;
 381     RawAIOCB *acb = (RawAIOCB *)blockacb;
 382     RawAIOCB **pacb;
 383
 384     ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
 385     if (ret == AIO_NOTCANCELED) {
 386         /* fail safe: if the aio could not be canceled, we wait for
 387            it */
 388         while (aio_error(&acb->aiocb) == EINPROGRESS);
 389     }
 390
 391     /* remove the callback from the queue */
 392     pacb = &first_aio;
 393     for(;;) {
 394         if (*pacb == NULL) {
 395             break;
 396         } else if (*pacb == acb) {
 397             *pacb = acb->next;
 398             qemu_aio_release(acb);
 399             break;
 400         }
 401         pacb = &acb->next;
 402     }
 403 }
 404
 405 static void raw_close(BlockDriverState *bs)
 406 {
 407     BDRVRawState *s = bs->opaque;
 408     close(s->fd);
 409 }
 410
 411 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 412 {
 413     BDRVRawState *s = bs->opaque;
 414     if (ftruncate(s->fd, offset) < 0)
 415         return -errno;
 416     return 0;
 417 }
 418
 419 static int64_t  raw_getlength(BlockDriverState *bs)
 420 {
 421     BDRVRawState *s = bs->opaque;
 422     int fd = s->fd;
 423     int64_t size;
 424 #ifdef _BSD
 425     struct stat sb;
 426 #endif
 427 #ifdef __sun__
 428     struct dk_minfo minfo;
 429     int rv;
 430 #endif
 431
 432 #ifdef _BSD
 433     if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
 434 #ifdef DIOCGMEDIASIZE
 435         if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
 436 #endif
 437 #ifdef CONFIG_COCOA
 438         size = LONG_LONG_MAX;
 439 #else
 440         size = lseek(fd, 0LL, SEEK_END);
 441 #endif
 442     } else
 443 #endif
 444 #ifdef __sun__
 445     /*
 446      * use the DKIOCGMEDIAINFO ioctl to read the size.
 447      */
 448     rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
 449     if ( rv != -1 ) {
 450         size = minfo.dki_lbsize * minfo.dki_capacity;
 451     } else /* there are reports that lseek on some devices
 452               fails, but irc discussion said that contingency
 453               on contingency was overkill */
 454 #endif
 455     {
 456         size = lseek(fd, 0, SEEK_END);
 457     }
 458 #ifdef _WIN32
 459     /* On Windows hosts it can happen that we're unable to get file size
 460        for CD-ROM raw device (it's inherent limitation of the CDFS driver). */
 461     if (size == -1)
 462         size = LONG_LONG_MAX;
 463 #endif
 464     return size;
 465 }
 466
 467 static int raw_create(const char *filename, int64_t total_size,
 468                       const char *backing_file, int flags)
 469 {
 470     int fd;
 471
 472     if (flags || backing_file)
 473         return -ENOTSUP;
 474
 475     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 476               0644);
 477     if (fd < 0)
 478         return -EIO;
 479     ftruncate(fd, total_size * 512);
 480     close(fd);
 481     return 0;
 482 }
 483
 484 static void raw_flush(BlockDriverState *bs)
 485 {
 486     BDRVRawState *s = bs->opaque;
 487     fsync(s->fd);
 488 }
 489
 490 BlockDriver bdrv_raw = {
 491     "raw",
 492     sizeof(BDRVRawState),
 493     NULL, /* no probe for protocols */
 494     raw_open,
 495     NULL,
 496     NULL,
 497     raw_close,
 498     raw_create,
 499     raw_flush,
 500
 501     .bdrv_aio_read = raw_aio_read,
 502     .bdrv_aio_write = raw_aio_write,
 503     .bdrv_aio_cancel = raw_aio_cancel,
 504     .aiocb_size = sizeof(RawAIOCB),
 505     .protocol_name = "file",
 506     .bdrv_pread = raw_pread,
 507     .bdrv_pwrite = raw_pwrite,
 508     .bdrv_truncate = raw_truncate,
 509     .bdrv_getlength = raw_getlength,
 510 };
 511
 512 #else /* _WIN32 */
 513
 514 /* XXX: use another file ? */
 515 #include <winioctl.h>
 516
 517 typedef struct BDRVRawState {
 518     HANDLE hfile;
 519 } BDRVRawState;
 520
 521 typedef struct RawAIOCB {
 522     BlockDriverAIOCB common;
 523     HANDLE hEvent;
 524     OVERLAPPED ov;
 525     int count;
 526 } RawAIOCB;
 527
 528 int qemu_ftruncate64(int fd, int64_t length)
 529 {
 530     LARGE_INTEGER li;
 531     LONG high;
 532     HANDLE h;
 533     BOOL res;
 534
 535     if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
 536         return -1;
 537
 538     h = (HANDLE)_get_osfhandle(fd);
 539
 540     /* get current position, ftruncate do not change position */
 541     li.HighPart = 0;
 542     li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
 543     if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
 544         return -1;
 545
 546     high = length >> 32;
 547     if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
 548         return -1;
 549     res = SetEndOfFile(h);
 550
 551     /* back to old position */
 552     SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
 553     return res ? 0 : -1;
 554 }
 555
 556 static int set_sparse(int fd)
 557 {
 558     DWORD returned;
 559     return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
 560                                  NULL, 0, NULL, 0, &returned, NULL);
 561 }
 562
 563 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 564 {
 565     BDRVRawState *s = bs->opaque;
 566     int access_flags, create_flags;
 567     DWORD overlapped;
 568
 569     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 570         access_flags = GENERIC_READ | GENERIC_WRITE;
 571     } else {
 572         access_flags = GENERIC_READ;
 573     }
 574     if (flags & BDRV_O_CREAT) {
 575         create_flags = CREATE_ALWAYS;
 576     } else {
 577         create_flags = OPEN_EXISTING;
 578     }
 579 #ifdef QEMU_TOOL
 580     overlapped = 0;
 581 #else
 582     overlapped = FILE_FLAG_OVERLAPPED;
 583 #endif
 584     s->hfile = CreateFile(filename, access_flags,
 585                           FILE_SHARE_READ, NULL,
 586                           create_flags, overlapped, 0);
 587     if (s->hfile == INVALID_HANDLE_VALUE)
 588         return -1;
 589     return 0;
 590 }
 591
 592 static int raw_pread(BlockDriverState *bs, int64_t offset,
 593                      uint8_t *buf, int count)
 594 {
 595     BDRVRawState *s = bs->opaque;
 596     OVERLAPPED ov;
 597     DWORD ret_count;
 598     int ret;
 599
 600     memset(&ov, 0, sizeof(ov));
 601     ov.Offset = offset;
 602     ov.OffsetHigh = offset >> 32;
 603     ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
 604     if (!ret) {
 605         ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
 606         if (!ret)
 607             return -EIO;
 608         else
 609             return ret_count;
 610     }
 611     return ret_count;
 612 }
 613
 614 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 615                       const uint8_t *buf, int count)
 616 {
 617     BDRVRawState *s = bs->opaque;
 618     OVERLAPPED ov;
 619     DWORD ret_count;
 620     int ret;
 621
 622     memset(&ov, 0, sizeof(ov));
 623     ov.Offset = offset;
 624     ov.OffsetHigh = offset >> 32;
 625     ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
 626     if (!ret) {
 627         ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
 628         if (!ret)
 629             return -EIO;
 630         else
 631             return ret_count;
 632     }
 633     return ret_count;
 634 }
 635
 636 #ifndef QEMU_TOOL
 637 static void raw_aio_cb(void *opaque)
 638 {
 639     RawAIOCB *acb = opaque;
 640     BlockDriverState *bs = acb->common.bs;
 641     BDRVRawState *s = bs->opaque;
 642     DWORD ret_count;
 643     int ret;
 644
 645     ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
 646     if (!ret || ret_count != acb->count) {
 647         acb->common.cb(acb->common.opaque, -EIO);
 648     } else {
 649         acb->common.cb(acb->common.opaque, 0);
 650     }
 651 }
 652 #endif
 653
 654 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
 655         int64_t sector_num, uint8_t *buf, int nb_sectors,
 656         BlockDriverCompletionFunc *cb, void *opaque)
 657 {
 658     RawAIOCB *acb;
 659     int64_t offset;
 660
 661     acb = qemu_aio_get(bs, cb, opaque);
 662     if (acb->hEvent) {
 663         acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 664         if (!acb->hEvent) {
 665             qemu_aio_release(acb);
 666             return NULL;
 667         }
 668     }
 669     memset(&acb->ov, 0, sizeof(acb->ov));
 670     offset = sector_num * 512;
 671     acb->ov.Offset = offset;
 672     acb->ov.OffsetHigh = offset >> 32;
 673     acb->ov.hEvent = acb->hEvent;
 674     acb->count = nb_sectors * 512;
 675 #ifndef QEMU_TOOL
 676     qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
 677 #endif
 678     return acb;
 679 }
 680
 681 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
 682         int64_t sector_num, uint8_t *buf, int nb_sectors,
 683         BlockDriverCompletionFunc *cb, void *opaque)
 684 {
 685     BDRVRawState *s = bs->opaque;
 686     RawAIOCB *acb;
 687     int ret;
 688
 689     acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
 690     if (!acb)
 691         return NULL;
 692     ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
 693     if (!ret) {
 694         qemu_aio_release(acb);
 695         return NULL;
 696     }
 697 #ifdef QEMU_TOOL
 698     qemu_aio_release(acb);
 699 #endif
 700     return (BlockDriverAIOCB *)acb;
 701 }
 702
 703 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
 704         int64_t sector_num, uint8_t *buf, int nb_sectors,
 705         BlockDriverCompletionFunc *cb, void *opaque)
 706 {
 707     BDRVRawState *s = bs->opaque;
 708     RawAIOCB *acb;
 709     int ret;
 710
 711     acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
 712     if (!acb)
 713         return NULL;
 714     ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
 715     if (!ret) {
 716         qemu_aio_release(acb);
 717         return NULL;
 718     }
 719 #ifdef QEMU_TOOL
 720     qemu_aio_release(acb);
 721 #endif
 722     return (BlockDriverAIOCB *)acb;
 723 }
 724
 725 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
 726 {
 727 #ifndef QEMU_TOOL
 728     RawAIOCB *acb = (RawAIOCB *)blockacb;
 729     BlockDriverState *bs = acb->common.bs;
 730     BDRVRawState *s = bs->opaque;
 731
 732     qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
 733     /* XXX: if more than one async I/O it is not correct */
 734     CancelIo(s->hfile);
 735     qemu_aio_release(acb);
 736 #endif
 737 }
 738
 739 static void raw_flush(BlockDriverState *bs)
 740 {
 741     /* XXX: add it */
 742 }
 743
 744 static void raw_close(BlockDriverState *bs)
 745 {
 746     BDRVRawState *s = bs->opaque;
 747     CloseHandle(s->hfile);
 748 }
 749
 750 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 751 {
 752     BDRVRawState *s = bs->opaque;
 753     DWORD low, high;
 754
 755     low = offset;
 756     high = offset >> 32;
 757     if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
 758         return -EIO;
 759     if (!SetEndOfFile(s->hfile))
 760         return -EIO;
 761     return 0;
 762 }
 763
 764 static int64_t  raw_getlength(BlockDriverState *bs)
 765 {
 766     BDRVRawState *s = bs->opaque;
 767     LARGE_INTEGER l;
 768
 769     l.LowPart = GetFileSize(s->hfile, &l.HighPart);
 770     if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
 771         return -EIO;
 772     return l.QuadPart;
 773 }
 774
 775 static int raw_create(const char *filename, int64_t total_size,
 776                       const char *backing_file, int flags)
 777 {
 778     int fd;
 779
 780     if (flags || backing_file)
 781         return -ENOTSUP;
 782
 783     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 784               0644);
 785     if (fd < 0)
 786         return -EIO;
 787     set_sparse(fd);
 788     ftruncate(fd, total_size * 512);
 789     close(fd);
 790     return 0;
 791 }
 792
 793 void qemu_aio_init(void)
 794 {
 795 }
 796
 797 void qemu_aio_poll(void)
 798 {
 799 }
 800
 801 void qemu_aio_wait_start(void)
 802 {
 803 }
 804
 805 void qemu_aio_wait(void)
 806 {
 807 }
 808
 809 void qemu_aio_wait_end(void)
 810 {
 811 }
 812
 813 BlockDriver bdrv_raw = {
 814     "raw",
 815     sizeof(BDRVRawState),
 816     NULL, /* no probe for protocols */
 817     raw_open,
 818     NULL,
 819     NULL,
 820     raw_close,
 821     raw_create,
 822     raw_flush,
 823
 824 #if 0
 825     .bdrv_aio_read = raw_aio_read,
 826     .bdrv_aio_write = raw_aio_write,
 827     .bdrv_aio_cancel = raw_aio_cancel,
 828     .aiocb_size = sizeof(RawAIOCB);
 829 #endif
 830     .protocol_name = "file",
 831     .bdrv_pread = raw_pread,
 832     .bdrv_pwrite = raw_pwrite,
 833     .bdrv_truncate = raw_truncate,
 834     .bdrv_getlength = raw_getlength,
 835 };
 836 #endif /* _WIN32 */