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 #define _POSIX_PTHREAD_SEMANTICS 1
  48 #include <signal.h>
  49 #include <sys/dkio.h>
  50 #endif
  51 #ifdef __linux__
  52 #include <sys/ioctl.h>
  53 #include <linux/cdrom.h>
  54 #include <linux/fd.h>
  55 #endif
  56 #ifdef __FreeBSD__
  57 #include <sys/disk.h>
  58 #endif
  59
  60 //#define DEBUG_FLOPPY
  61
  62 #define FTYPE_FILE   0
  63 #define FTYPE_CD     1
  64 #define FTYPE_FD     2
  65
  66 /* if the FD is not accessed during that time (in ms), we try to
  67    reopen it to see if the disk has been changed */
  68 #define FD_OPEN_TIMEOUT 1000
  69
  70 typedef struct BDRVRawState {
  71     int fd;
  72     int type;
  73 #if defined(__linux__)
  74     /* linux floppy specific */
  75     int fd_open_flags;
  76     int64_t fd_open_time;
  77     int64_t fd_error_time;
  78     int fd_got_error;
  79     int fd_media_changed;
  80 #endif
  81 } BDRVRawState;
  82
  83 static int fd_open(BlockDriverState *bs);
  84
  85 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
  86 {
  87     BDRVRawState *s = bs->opaque;
  88     int fd, open_flags, ret;
  89
  90     open_flags = O_BINARY;
  91     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
  92         open_flags |= O_RDWR;
  93     } else {
  94         open_flags |= O_RDONLY;
  95         bs->read_only = 1;
  96     }
  97     if (flags & BDRV_O_CREAT)
  98         open_flags |= O_CREAT | O_TRUNC;
  99
 100     s->type = FTYPE_FILE;
 101
 102     fd = open(filename, open_flags, 0644);
 103     if (fd < 0) {
 104         ret = -errno;
 105         if (ret == -EROFS)
 106             ret = -EACCES;
 107         return ret;
 108     }
 109     s->fd = fd;
 110     return 0;
 111 }
 112
 113 /* XXX: use host sector size if necessary with:
 114 #ifdef DIOCGSECTORSIZE
 115         {
 116             unsigned int sectorsize = 512;
 117             if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
 118                 sectorsize > bufsize)
 119                 bufsize = sectorsize;
 120         }
 121 #endif
 122 #ifdef CONFIG_COCOA
 123         u_int32_t   blockSize = 512;
 124         if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
 125             bufsize = blockSize;
 126         }
 127 #endif
 128 */
 129
 130 static int raw_pread(BlockDriverState *bs, int64_t offset,
 131                      uint8_t *buf, int count)
 132 {
 133     BDRVRawState *s = bs->opaque;
 134     int ret;
 135
 136     ret = fd_open(bs);
 137     if (ret < 0)
 138         return ret;
 139
 140     lseek(s->fd, offset, SEEK_SET);
 141     ret = read(s->fd, buf, count);
 142     return ret;
 143 }
 144
 145 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 146                       const uint8_t *buf, int count)
 147 {
 148     BDRVRawState *s = bs->opaque;
 149     int ret;
 150
 151     ret = fd_open(bs);
 152     if (ret < 0)
 153         return ret;
 154
 155     lseek(s->fd, offset, SEEK_SET);
 156     ret = write(s->fd, buf, count);
 157     return ret;
 158 }
 159
 160 /***********************************************************/
 161 /* Unix AIO using POSIX AIO */
 162
 163 typedef struct RawAIOCB {
 164     BlockDriverAIOCB common;
 165     struct aiocb aiocb;
 166     struct RawAIOCB *next;
 167 } RawAIOCB;
 168
 169 static int aio_sig_num = SIGUSR2;
 170 static RawAIOCB *first_aio; /* AIO issued */
 171 static int aio_initialized = 0;
 172
 173 static void aio_signal_handler(int signum)
 174 {
 175 #ifndef QEMU_TOOL
 176     CPUState *env = cpu_single_env;
 177     if (env) {
 178         /* stop the currently executing cpu because a timer occured */
 179         cpu_interrupt(env, CPU_INTERRUPT_EXIT);
 180 #ifdef USE_KQEMU
 181         if (env->kqemu_enabled) {
 182             kqemu_cpu_interrupt(env);
 183         }
 184 #endif
 185     }
 186 #endif
 187 }
 188
 189 void qemu_aio_init(void)
 190 {
 191     struct sigaction act;
 192
 193     aio_initialized = 1;
 194
 195     sigfillset(&act.sa_mask);
 196     act.sa_flags = 0; /* do not restart syscalls to interrupt select() */
 197     act.sa_handler = aio_signal_handler;
 198     sigaction(aio_sig_num, &act, NULL);
 199
 200 #if defined(__GLIBC__) && defined(__linux__)
 201     {
 202         /* XXX: aio thread exit seems to hang on RedHat 9 and this init
 203            seems to fix the problem. */
 204         struct aioinit ai;
 205         memset(&ai, 0, sizeof(ai));
 206         ai.aio_threads = 1;
 207         ai.aio_num = 1;
 208         ai.aio_idle_time = 365 * 100000;
 209         aio_init(&ai);
 210     }
 211 #endif
 212 }
 213
 214 void qemu_aio_poll(void)
 215 {
 216     RawAIOCB *acb, **pacb;
 217     int ret;
 218
 219     for(;;) {
 220         pacb = &first_aio;
 221         for(;;) {
 222             acb = *pacb;
 223             if (!acb)
 224                 goto the_end;
 225             ret = aio_error(&acb->aiocb);
 226             if (ret == ECANCELED) {
 227                 /* remove the request */
 228                 *pacb = acb->next;
 229                 qemu_aio_release(acb);
 230             } else if (ret != EINPROGRESS) {
 231                 /* end of aio */
 232                 if (ret == 0) {
 233                     ret = aio_return(&acb->aiocb);
 234                     if (ret == acb->aiocb.aio_nbytes)
 235                         ret = 0;
 236                     else
 237                         ret = -EINVAL;
 238                 } else {
 239                     ret = -ret;
 240                 }
 241                 /* remove the request */
 242                 *pacb = acb->next;
 243                 /* call the callback */
 244                 acb->common.cb(acb->common.opaque, ret);
 245                 qemu_aio_release(acb);
 246                 break;
 247             } else {
 248                 pacb = &acb->next;
 249             }
 250         }
 251     }
 252  the_end: ;
 253 }
 254
 255 /* Wait for all IO requests to complete.  */
 256 void qemu_aio_flush(void)
 257 {
 258     qemu_aio_wait_start();
 259     qemu_aio_poll();
 260     while (first_aio) {
 261         qemu_aio_wait();
 262     }
 263     qemu_aio_wait_end();
 264 }
 265
 266 /* wait until at least one AIO was handled */
 267 static sigset_t wait_oset;
 268
 269 void qemu_aio_wait_start(void)
 270 {
 271     sigset_t set;
 272
 273     if (!aio_initialized)
 274         qemu_aio_init();
 275     sigemptyset(&set);
 276     sigaddset(&set, aio_sig_num);
 277     sigprocmask(SIG_BLOCK, &set, &wait_oset);
 278 }
 279
 280 void qemu_aio_wait(void)
 281 {
 282     sigset_t set;
 283     int nb_sigs;
 284
 285 #ifndef QEMU_TOOL
 286     if (qemu_bh_poll())
 287         return;
 288 #endif
 289     sigemptyset(&set);
 290     sigaddset(&set, aio_sig_num);
 291     sigwait(&set, &nb_sigs);
 292     qemu_aio_poll();
 293 }
 294
 295 void qemu_aio_wait_end(void)
 296 {
 297     sigprocmask(SIG_SETMASK, &wait_oset, NULL);
 298 }
 299
 300 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
 301         int64_t sector_num, uint8_t *buf, int nb_sectors,
 302         BlockDriverCompletionFunc *cb, void *opaque)
 303 {
 304     BDRVRawState *s = bs->opaque;
 305     RawAIOCB *acb;
 306
 307     if (fd_open(bs) < 0)
 308         return NULL;
 309
 310     acb = qemu_aio_get(bs, cb, opaque);
 311     if (!acb)
 312         return NULL;
 313     acb->aiocb.aio_fildes = s->fd;
 314     acb->aiocb.aio_sigevent.sigev_signo = aio_sig_num;
 315     acb->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
 316     acb->aiocb.aio_buf = buf;
 317     acb->aiocb.aio_nbytes = nb_sectors * 512;
 318     acb->aiocb.aio_offset = sector_num * 512;
 319     acb->next = first_aio;
 320     first_aio = acb;
 321     return acb;
 322 }
 323
 324 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
 325         int64_t sector_num, uint8_t *buf, int nb_sectors,
 326         BlockDriverCompletionFunc *cb, void *opaque)
 327 {
 328     RawAIOCB *acb;
 329
 330     acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
 331     if (!acb)
 332         return NULL;
 333     if (aio_read(&acb->aiocb) < 0) {
 334         qemu_aio_release(acb);
 335         return NULL;
 336     }
 337     return &acb->common;
 338 }
 339
 340 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
 341         int64_t sector_num, const uint8_t *buf, int nb_sectors,
 342         BlockDriverCompletionFunc *cb, void *opaque)
 343 {
 344     RawAIOCB *acb;
 345
 346     acb = raw_aio_setup(bs, sector_num, (uint8_t*)buf, nb_sectors, cb, opaque);
 347     if (!acb)
 348         return NULL;
 349     if (aio_write(&acb->aiocb) < 0) {
 350         qemu_aio_release(acb);
 351         return NULL;
 352     }
 353     return &acb->common;
 354 }
 355
 356 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
 357 {
 358     int ret;
 359     RawAIOCB *acb = (RawAIOCB *)blockacb;
 360     RawAIOCB **pacb;
 361
 362     ret = aio_cancel(acb->aiocb.aio_fildes, &acb->aiocb);
 363     if (ret == AIO_NOTCANCELED) {
 364         /* fail safe: if the aio could not be canceled, we wait for
 365            it */
 366         while (aio_error(&acb->aiocb) == EINPROGRESS);
 367     }
 368
 369     /* remove the callback from the queue */
 370     pacb = &first_aio;
 371     for(;;) {
 372         if (*pacb == NULL) {
 373             break;
 374         } else if (*pacb == acb) {
 375             *pacb = acb->next;
 376             qemu_aio_release(acb);
 377             break;
 378         }
 379         pacb = &acb->next;
 380     }
 381 }
 382
 383 static void raw_close(BlockDriverState *bs)
 384 {
 385     BDRVRawState *s = bs->opaque;
 386     if (s->fd >= 0) {
 387         close(s->fd);
 388         s->fd = -1;
 389     }
 390 }
 391
 392 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 393 {
 394     BDRVRawState *s = bs->opaque;
 395     if (s->type != FTYPE_FILE)
 396         return -ENOTSUP;
 397     if (ftruncate(s->fd, offset) < 0)
 398         return -errno;
 399     return 0;
 400 }
 401
 402 static int64_t  raw_getlength(BlockDriverState *bs)
 403 {
 404     BDRVRawState *s = bs->opaque;
 405     int fd = s->fd;
 406     int64_t size;
 407 #ifdef _BSD
 408     struct stat sb;
 409 #endif
 410 #ifdef __sun__
 411     struct dk_minfo minfo;
 412     int rv;
 413 #endif
 414     int ret;
 415
 416     ret = fd_open(bs);
 417     if (ret < 0)
 418         return ret;
 419
 420 #ifdef _BSD
 421     if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
 422 #ifdef DIOCGMEDIASIZE
 423         if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
 424 #endif
 425 #ifdef CONFIG_COCOA
 426         size = LONG_LONG_MAX;
 427 #else
 428         size = lseek(fd, 0LL, SEEK_END);
 429 #endif
 430     } else
 431 #endif
 432 #ifdef __sun__
 433     /*
 434      * use the DKIOCGMEDIAINFO ioctl to read the size.
 435      */
 436     rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
 437     if ( rv != -1 ) {
 438         size = minfo.dki_lbsize * minfo.dki_capacity;
 439     } else /* there are reports that lseek on some devices
 440               fails, but irc discussion said that contingency
 441               on contingency was overkill */
 442 #endif
 443     {
 444         size = lseek(fd, 0, SEEK_END);
 445     }
 446     return size;
 447 }
 448
 449 static int raw_create(const char *filename, int64_t total_size,
 450                       const char *backing_file, int flags)
 451 {
 452     int fd;
 453
 454     if (flags || backing_file)
 455         return -ENOTSUP;
 456
 457     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
 458               0644);
 459     if (fd < 0)
 460         return -EIO;
 461     ftruncate(fd, total_size * 512);
 462     close(fd);
 463     return 0;
 464 }
 465
 466 static void raw_flush(BlockDriverState *bs)
 467 {
 468     BDRVRawState *s = bs->opaque;
 469     fsync(s->fd);
 470 }
 471
 472 BlockDriver bdrv_raw = {
 473     "raw",
 474     sizeof(BDRVRawState),
 475     NULL, /* no probe for protocols */
 476     raw_open,
 477     NULL,
 478     NULL,
 479     raw_close,
 480     raw_create,
 481     raw_flush,
 482
 483     .bdrv_aio_read = raw_aio_read,
 484     .bdrv_aio_write = raw_aio_write,
 485     .bdrv_aio_cancel = raw_aio_cancel,
 486     .aiocb_size = sizeof(RawAIOCB),
 487     .protocol_name = "file",
 488     .bdrv_pread = raw_pread,
 489     .bdrv_pwrite = raw_pwrite,
 490     .bdrv_truncate = raw_truncate,
 491     .bdrv_getlength = raw_getlength,
 492 };
 493
 494 /***********************************************/
 495 /* host device */
 496
 497 #ifdef CONFIG_COCOA
 498 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
 499 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
 500
 501 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
 502 {
 503     kern_return_t       kernResult;
 504     mach_port_t     masterPort;
 505     CFMutableDictionaryRef  classesToMatch;
 506
 507     kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
 508     if ( KERN_SUCCESS != kernResult ) {
 509         printf( "IOMasterPort returned %d\n", kernResult );
 510     }
 511
 512     classesToMatch = IOServiceMatching( kIOCDMediaClass );
 513     if ( classesToMatch == NULL ) {
 514         printf( "IOServiceMatching returned a NULL dictionary.\n" );
 515     } else {
 516     CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
 517     }
 518     kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
 519     if ( KERN_SUCCESS != kernResult )
 520     {
 521         printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
 522     }
 523
 524     return kernResult;
 525 }
 526
 527 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
 528 {
 529     io_object_t     nextMedia;
 530     kern_return_t   kernResult = KERN_FAILURE;
 531     *bsdPath = '\0';
 532     nextMedia = IOIteratorNext( mediaIterator );
 533     if ( nextMedia )
 534     {
 535         CFTypeRef   bsdPathAsCFString;
 536     bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
 537         if ( bsdPathAsCFString ) {
 538             size_t devPathLength;
 539             strcpy( bsdPath, _PATH_DEV );
 540             strcat( bsdPath, "r" );
 541             devPathLength = strlen( bsdPath );
 542             if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
 543                 kernResult = KERN_SUCCESS;
 544             }
 545             CFRelease( bsdPathAsCFString );
 546         }
 547         IOObjectRelease( nextMedia );
 548     }
 549
 550     return kernResult;
 551 }
 552
 553 #endif
 554
 555 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
 556 {
 557     BDRVRawState *s = bs->opaque;
 558     int fd, open_flags, ret;
 559
 560 #ifdef CONFIG_COCOA
 561     if (strstart(filename, "/dev/cdrom", NULL)) {
 562         kern_return_t kernResult;
 563         io_iterator_t mediaIterator;
 564         char bsdPath[ MAXPATHLEN ];
 565         int fd;
 566
 567         kernResult = FindEjectableCDMedia( &mediaIterator );
 568         kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
 569
 570         if ( bsdPath[ 0 ] != '\0' ) {
 571             strcat(bsdPath,"s0");
 572             /* some CDs don't have a partition 0 */
 573             fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
 574             if (fd < 0) {
 575                 bsdPath[strlen(bsdPath)-1] = '1';
 576             } else {
 577                 close(fd);
 578             }
 579             filename = bsdPath;
 580         }
 581
 582         if ( mediaIterator )
 583             IOObjectRelease( mediaIterator );
 584     }
 585 #endif
 586     open_flags = O_BINARY;
 587     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 588         open_flags |= O_RDWR;
 589     } else {
 590         open_flags |= O_RDONLY;
 591         bs->read_only = 1;
 592     }
 593
 594     s->type = FTYPE_FILE;
 595 #if defined(__linux__)
 596     if (strstart(filename, "/dev/cd", NULL)) {
 597         /* open will not fail even if no CD is inserted */
 598         open_flags |= O_NONBLOCK;
 599         s->type = FTYPE_CD;
 600     } else if (strstart(filename, "/dev/fd", NULL)) {
 601         s->type = FTYPE_FD;
 602         s->fd_open_flags = open_flags;
 603         /* open will not fail even if no floppy is inserted */
 604         open_flags |= O_NONBLOCK;
 605     }
 606 #endif
 607     fd = open(filename, open_flags, 0644);
 608     if (fd < 0) {
 609         ret = -errno;
 610         if (ret == -EROFS)
 611             ret = -EACCES;
 612         return ret;
 613     }
 614     s->fd = fd;
 615 #if defined(__linux__)
 616     /* close fd so that we can reopen it as needed */
 617     if (s->type == FTYPE_FD) {
 618         close(s->fd);
 619         s->fd = -1;
 620         s->fd_media_changed = 1;
 621     }
 622 #endif
 623     return 0;
 624 }
 625
 626 #if defined(__linux__) && !defined(QEMU_TOOL)
 627
 628 /* Note: we do not have a reliable method to detect if the floppy is
 629    present. The current method is to try to open the floppy at every
 630    I/O and to keep it opened during a few hundreds of ms. */
 631 static int fd_open(BlockDriverState *bs)
 632 {
 633     BDRVRawState *s = bs->opaque;
 634     int last_media_present;
 635
 636     if (s->type != FTYPE_FD)
 637         return 0;
 638     last_media_present = (s->fd >= 0);
 639     if (s->fd >= 0 &&
 640         (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
 641         close(s->fd);
 642         s->fd = -1;
 643 #ifdef DEBUG_FLOPPY
 644         printf("Floppy closed\n");
 645 #endif
 646     }
 647     if (s->fd < 0) {
 648         if (s->fd_got_error &&
 649             (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
 650 #ifdef DEBUG_FLOPPY
 651             printf("No floppy (open delayed)\n");
 652 #endif
 653             return -EIO;
 654         }
 655         s->fd = open(bs->filename, s->fd_open_flags);
 656         if (s->fd < 0) {
 657             s->fd_error_time = qemu_get_clock(rt_clock);
 658             s->fd_got_error = 1;
 659             if (last_media_present)
 660                 s->fd_media_changed = 1;
 661 #ifdef DEBUG_FLOPPY
 662             printf("No floppy\n");
 663 #endif
 664             return -EIO;
 665         }
 666 #ifdef DEBUG_FLOPPY
 667         printf("Floppy opened\n");
 668 #endif
 669     }
 670     if (!last_media_present)
 671         s->fd_media_changed = 1;
 672     s->fd_open_time = qemu_get_clock(rt_clock);
 673     s->fd_got_error = 0;
 674     return 0;
 675 }
 676 #else
 677 static int fd_open(BlockDriverState *bs)
 678 {
 679     return 0;
 680 }
 681 #endif
 682
 683 #if defined(__linux__)
 684
 685 static int raw_is_inserted(BlockDriverState *bs)
 686 {
 687     BDRVRawState *s = bs->opaque;
 688     int ret;
 689
 690     switch(s->type) {
 691     case FTYPE_CD:
 692         ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
 693         if (ret == CDS_DISC_OK)
 694             return 1;
 695         else
 696             return 0;
 697         break;
 698     case FTYPE_FD:
 699         ret = fd_open(bs);
 700         return (ret >= 0);
 701     default:
 702         return 1;
 703     }
 704 }
 705
 706 /* currently only used by fdc.c, but a CD version would be good too */
 707 static int raw_media_changed(BlockDriverState *bs)
 708 {
 709     BDRVRawState *s = bs->opaque;
 710
 711     switch(s->type) {
 712     case FTYPE_FD:
 713         {
 714             int ret;
 715             /* XXX: we do not have a true media changed indication. It
 716                does not work if the floppy is changed without trying
 717                to read it */
 718             fd_open(bs);
 719             ret = s->fd_media_changed;
 720             s->fd_media_changed = 0;
 721 #ifdef DEBUG_FLOPPY
 722             printf("Floppy changed=%d\n", ret);
 723 #endif
 724             return ret;
 725         }
 726     default:
 727         return -ENOTSUP;
 728     }
 729 }
 730
 731 static int raw_eject(BlockDriverState *bs, int eject_flag)
 732 {
 733     BDRVRawState *s = bs->opaque;
 734
 735     switch(s->type) {
 736     case FTYPE_CD:
 737         if (eject_flag) {
 738             if (ioctl (s->fd, CDROMEJECT, NULL) < 0)
 739                 perror("CDROMEJECT");
 740         } else {
 741             if (ioctl (s->fd, CDROMCLOSETRAY, NULL) < 0)
 742                 perror("CDROMEJECT");
 743         }
 744         break;
 745     case FTYPE_FD:
 746         {
 747             int fd;
 748             if (s->fd >= 0) {
 749                 close(s->fd);
 750                 s->fd = -1;
 751             }
 752             fd = open(bs->filename, s->fd_open_flags | O_NONBLOCK);
 753             if (fd >= 0) {
 754                 if (ioctl(fd, FDEJECT, 0) < 0)
 755                     perror("FDEJECT");
 756                 close(fd);
 757             }
 758         }
 759         break;
 760     default:
 761         return -ENOTSUP;
 762     }
 763     return 0;
 764 }
 765
 766 static int raw_set_locked(BlockDriverState *bs, int locked)
 767 {
 768     BDRVRawState *s = bs->opaque;
 769
 770     switch(s->type) {
 771     case FTYPE_CD:
 772         if (ioctl (s->fd, CDROM_LOCKDOOR, locked) < 0) {
 773             /* Note: an error can happen if the distribution automatically
 774                mounts the CD-ROM */
 775             //        perror("CDROM_LOCKDOOR");
 776         }
 777         break;
 778     default:
 779         return -ENOTSUP;
 780     }
 781     return 0;
 782 }
 783
 784 #else
 785
 786 static int raw_is_inserted(BlockDriverState *bs)
 787 {
 788     return 1;
 789 }
 790
 791 static int raw_media_changed(BlockDriverState *bs)
 792 {
 793     return -ENOTSUP;
 794 }
 795
 796 static int raw_eject(BlockDriverState *bs, int eject_flag)
 797 {
 798     return -ENOTSUP;
 799 }
 800
 801 static int raw_set_locked(BlockDriverState *bs, int locked)
 802 {
 803     return -ENOTSUP;
 804 }
 805
 806 #endif /* !linux */
 807
 808 BlockDriver bdrv_host_device = {
 809     "host_device",
 810     sizeof(BDRVRawState),
 811     NULL, /* no probe for protocols */
 812     hdev_open,
 813     NULL,
 814     NULL,
 815     raw_close,
 816     NULL,
 817     raw_flush,
 818
 819     .bdrv_aio_read = raw_aio_read,
 820     .bdrv_aio_write = raw_aio_write,
 821     .bdrv_aio_cancel = raw_aio_cancel,
 822     .aiocb_size = sizeof(RawAIOCB),
 823     .bdrv_pread = raw_pread,
 824     .bdrv_pwrite = raw_pwrite,
 825     .bdrv_getlength = raw_getlength,
 826
 827     /* removable device support */
 828     .bdrv_is_inserted = raw_is_inserted,
 829     .bdrv_media_changed = raw_media_changed,
 830     .bdrv_eject = raw_eject,
 831     .bdrv_set_locked = raw_set_locked,
 832 };
 833
 834 #else /* _WIN32 */
 835
 836 /* XXX: use another file ? */
 837 #include <winioctl.h>
 838
 839 #define FTYPE_FILE 0
 840 #define FTYPE_CD     1
 841
 842 typedef struct BDRVRawState {
 843     HANDLE hfile;
 844     int type;
 845     char drive_path[16]; /* format: "d:\" */
 846 } BDRVRawState;
 847
 848 typedef struct RawAIOCB {
 849     BlockDriverAIOCB common;
 850     HANDLE hEvent;
 851     OVERLAPPED ov;
 852     int count;
 853 } RawAIOCB;
 854
 855 int qemu_ftruncate64(int fd, int64_t length)
 856 {
 857     LARGE_INTEGER li;
 858     LONG high;
 859     HANDLE h;
 860     BOOL res;
 861
 862     if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
 863         return -1;
 864
 865     h = (HANDLE)_get_osfhandle(fd);
 866
 867     /* get current position, ftruncate do not change position */
 868     li.HighPart = 0;
 869     li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
 870     if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
 871         return -1;
 872
 873     high = length >> 32;
 874     if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
 875         return -1;
 876     res = SetEndOfFile(h);
 877
 878     /* back to old position */
 879     SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
 880     return res ? 0 : -1;
 881 }
 882
 883 static int set_sparse(int fd)
 884 {
 885     DWORD returned;
 886     return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
 887                                  NULL, 0, NULL, 0, &returned, NULL);
 888 }
 889
 890 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 891 {
 892     BDRVRawState *s = bs->opaque;
 893     int access_flags, create_flags;
 894     DWORD overlapped;
 895
 896     s->type = FTYPE_FILE;
 897
 898     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
 899         access_flags = GENERIC_READ | GENERIC_WRITE;
 900     } else {
 901         access_flags = GENERIC_READ;
 902     }
 903     if (flags & BDRV_O_CREAT) {
 904         create_flags = CREATE_ALWAYS;
 905     } else {
 906         create_flags = OPEN_EXISTING;
 907     }
 908 #ifdef QEMU_TOOL
 909     overlapped = 0;
 910 #else
 911     overlapped = FILE_FLAG_OVERLAPPED;
 912 #endif
 913     s->hfile = CreateFile(filename, access_flags,
 914                           FILE_SHARE_READ, NULL,
 915                           create_flags, overlapped, 0);
 916     if (s->hfile == INVALID_HANDLE_VALUE)
 917         return -1;
 918     return 0;
 919 }
 920
 921 static int raw_pread(BlockDriverState *bs, int64_t offset,
 922                      uint8_t *buf, int count)
 923 {
 924     BDRVRawState *s = bs->opaque;
 925     OVERLAPPED ov;
 926     DWORD ret_count;
 927     int ret;
 928
 929     memset(&ov, 0, sizeof(ov));
 930     ov.Offset = offset;
 931     ov.OffsetHigh = offset >> 32;
 932     ret = ReadFile(s->hfile, buf, count, &ret_count, &ov);
 933     if (!ret) {
 934         ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
 935         if (!ret)
 936             return -EIO;
 937         else
 938             return ret_count;
 939     }
 940     return ret_count;
 941 }
 942
 943 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
 944                       const uint8_t *buf, int count)
 945 {
 946     BDRVRawState *s = bs->opaque;
 947     OVERLAPPED ov;
 948     DWORD ret_count;
 949     int ret;
 950
 951     memset(&ov, 0, sizeof(ov));
 952     ov.Offset = offset;
 953     ov.OffsetHigh = offset >> 32;
 954     ret = WriteFile(s->hfile, buf, count, &ret_count, &ov);
 955     if (!ret) {
 956         ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE);
 957         if (!ret)
 958             return -EIO;
 959         else
 960             return ret_count;
 961     }
 962     return ret_count;
 963 }
 964
 965 #ifndef QEMU_TOOL
 966 static void raw_aio_cb(void *opaque)
 967 {
 968     RawAIOCB *acb = opaque;
 969     BlockDriverState *bs = acb->common.bs;
 970     BDRVRawState *s = bs->opaque;
 971     DWORD ret_count;
 972     int ret;
 973
 974     ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
 975     if (!ret || ret_count != acb->count) {
 976         acb->common.cb(acb->common.opaque, -EIO);
 977     } else {
 978         acb->common.cb(acb->common.opaque, 0);
 979     }
 980 }
 981 #endif
 982
 983 static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
 984         int64_t sector_num, uint8_t *buf, int nb_sectors,
 985         BlockDriverCompletionFunc *cb, void *opaque)
 986 {
 987     RawAIOCB *acb;
 988     int64_t offset;
 989
 990     acb = qemu_aio_get(bs, cb, opaque);
 991     if (acb->hEvent) {
 992         acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 993         if (!acb->hEvent) {
 994             qemu_aio_release(acb);
 995             return NULL;
 996         }
 997     }
 998     memset(&acb->ov, 0, sizeof(acb->ov));
 999     offset = sector_num * 512;
1000     acb->ov.Offset = offset;
1001     acb->ov.OffsetHigh = offset >> 32;
1002     acb->ov.hEvent = acb->hEvent;
1003     acb->count = nb_sectors * 512;
1004 #ifndef QEMU_TOOL
1005     qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
1006 #endif
1007     return acb;
1008 }
1009
1010 static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
1011         int64_t sector_num, uint8_t *buf, int nb_sectors,
1012         BlockDriverCompletionFunc *cb, void *opaque)
1013 {
1014     BDRVRawState *s = bs->opaque;
1015     RawAIOCB *acb;
1016     int ret;
1017
1018     acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
1019     if (!acb)
1020         return NULL;
1021     ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
1022     if (!ret) {
1023         qemu_aio_release(acb);
1024         return NULL;
1025     }
1026 #ifdef QEMU_TOOL
1027     qemu_aio_release(acb);
1028 #endif
1029     return (BlockDriverAIOCB *)acb;
1030 }
1031
1032 static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
1033         int64_t sector_num, uint8_t *buf, int nb_sectors,
1034         BlockDriverCompletionFunc *cb, void *opaque)
1035 {
1036     BDRVRawState *s = bs->opaque;
1037     RawAIOCB *acb;
1038     int ret;
1039
1040     acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
1041     if (!acb)
1042         return NULL;
1043     ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
1044     if (!ret) {
1045         qemu_aio_release(acb);
1046         return NULL;
1047     }
1048 #ifdef QEMU_TOOL
1049     qemu_aio_release(acb);
1050 #endif
1051     return (BlockDriverAIOCB *)acb;
1052 }
1053
1054 static void raw_aio_cancel(BlockDriverAIOCB *blockacb)
1055 {
1056 #ifndef QEMU_TOOL
1057     RawAIOCB *acb = (RawAIOCB *)blockacb;
1058     BlockDriverState *bs = acb->common.bs;
1059     BDRVRawState *s = bs->opaque;
1060
1061     qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb);
1062     /* XXX: if more than one async I/O it is not correct */
1063     CancelIo(s->hfile);
1064     qemu_aio_release(acb);
1065 #endif
1066 }
1067
1068 static void raw_flush(BlockDriverState *bs)
1069 {
1070     /* XXX: add it */
1071 }
1072
1073 static void raw_close(BlockDriverState *bs)
1074 {
1075     BDRVRawState *s = bs->opaque;
1076     CloseHandle(s->hfile);
1077 }
1078
1079 static int raw_truncate(BlockDriverState *bs, int64_t offset)
1080 {
1081     BDRVRawState *s = bs->opaque;
1082     DWORD low, high;
1083
1084     low = offset;
1085     high = offset >> 32;
1086     if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
1087         return -EIO;
1088     if (!SetEndOfFile(s->hfile))
1089         return -EIO;
1090     return 0;
1091 }
1092
1093 static int64_t raw_getlength(BlockDriverState *bs)
1094 {
1095     BDRVRawState *s = bs->opaque;
1096     LARGE_INTEGER l;
1097     ULARGE_INTEGER available, total, total_free;
1098
1099     switch(s->type) {
1100     case FTYPE_FILE:
1101         l.LowPart = GetFileSize(s->hfile, &l.HighPart);
1102         if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
1103             return -EIO;
1104         break;
1105     case FTYPE_CD:
1106         if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
1107             return -EIO;
1108         l.QuadPart = total.QuadPart;
1109         break;
1110     default:
1111         return -EIO;
1112     }
1113     return l.QuadPart;
1114 }
1115
1116 static int raw_create(const char *filename, int64_t total_size,
1117                       const char *backing_file, int flags)
1118 {
1119     int fd;
1120
1121     if (flags || backing_file)
1122         return -ENOTSUP;
1123
1124     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
1125               0644);
1126     if (fd < 0)
1127         return -EIO;
1128     set_sparse(fd);
1129     ftruncate(fd, total_size * 512);
1130     close(fd);
1131     return 0;
1132 }
1133
1134 void qemu_aio_init(void)
1135 {
1136 }
1137
1138 void qemu_aio_poll(void)
1139 {
1140 }
1141
1142 void qemu_aio_flush(void)
1143 {
1144 }
1145
1146 void qemu_aio_wait_start(void)
1147 {
1148 }
1149
1150 void qemu_aio_wait(void)
1151 {
1152 #ifndef QEMU_TOOL
1153     qemu_bh_poll();
1154 #endif
1155 }
1156
1157 void qemu_aio_wait_end(void)
1158 {
1159 }
1160
1161 BlockDriver bdrv_raw = {
1162     "raw",
1163     sizeof(BDRVRawState),
1164     NULL, /* no probe for protocols */
1165     raw_open,
1166     NULL,
1167     NULL,
1168     raw_close,
1169     raw_create,
1170     raw_flush,
1171
1172 #if 0
1173     .bdrv_aio_read = raw_aio_read,
1174     .bdrv_aio_write = raw_aio_write,
1175     .bdrv_aio_cancel = raw_aio_cancel,
1176     .aiocb_size = sizeof(RawAIOCB);
1177 #endif
1178     .protocol_name = "file",
1179     .bdrv_pread = raw_pread,
1180     .bdrv_pwrite = raw_pwrite,
1181     .bdrv_truncate = raw_truncate,
1182     .bdrv_getlength = raw_getlength,
1183 };
1184
1185 /***********************************************/
1186 /* host device */
1187
1188 static int find_cdrom(char *cdrom_name, int cdrom_name_size)
1189 {
1190     char drives[256], *pdrv = drives;
1191     UINT type;
1192
1193     memset(drives, 0, sizeof(drives));
1194     GetLogicalDriveStrings(sizeof(drives), drives);
1195     while(pdrv[0] != '\0') {
1196         type = GetDriveType(pdrv);
1197         switch(type) {
1198         case DRIVE_CDROM:
1199             snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
1200             return 0;
1201             break;
1202         }
1203         pdrv += lstrlen(pdrv) + 1;
1204     }
1205     return -1;
1206 }
1207
1208 static int find_device_type(BlockDriverState *bs, const char *filename)
1209 {
1210     BDRVRawState *s = bs->opaque;
1211     UINT type;
1212     const char *p;
1213
1214     if (strstart(filename, "\\\\.\\", &p) ||
1215         strstart(filename, "//./", &p)) {
1216         snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
1217         type = GetDriveType(s->drive_path);
1218         if (type == DRIVE_CDROM)
1219             return FTYPE_CD;
1220         else
1221             return FTYPE_FILE;
1222     } else {
1223         return FTYPE_FILE;
1224     }
1225 }
1226
1227 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
1228 {
1229     BDRVRawState *s = bs->opaque;
1230     int access_flags, create_flags;
1231     DWORD overlapped;
1232     char device_name[64];
1233
1234     if (strstart(filename, "/dev/cdrom", NULL)) {
1235         if (find_cdrom(device_name, sizeof(device_name)) < 0)
1236             return -ENOENT;
1237         filename = device_name;
1238     } else {
1239         /* transform drive letters into device name */
1240         if (((filename[0] >= 'a' && filename[0] <= 'z') ||
1241              (filename[0] >= 'A' && filename[0] <= 'Z')) &&
1242             filename[1] == ':' && filename[2] == '\0') {
1243             snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
1244             filename = device_name;
1245         }
1246     }
1247     s->type = find_device_type(bs, filename);
1248
1249     if ((flags & BDRV_O_ACCESS) == O_RDWR) {
1250         access_flags = GENERIC_READ | GENERIC_WRITE;
1251     } else {
1252         access_flags = GENERIC_READ;
1253     }
1254     create_flags = OPEN_EXISTING;
1255
1256 #ifdef QEMU_TOOL
1257     overlapped = 0;
1258 #else
1259     overlapped = FILE_FLAG_OVERLAPPED;
1260 #endif
1261     s->hfile = CreateFile(filename, access_flags,
1262                           FILE_SHARE_READ, NULL,
1263                           create_flags, overlapped, 0);
1264     if (s->hfile == INVALID_HANDLE_VALUE)
1265         return -1;
1266     return 0;
1267 }
1268
1269 #if 0
1270 /***********************************************/
1271 /* removable device additionnal commands */
1272
1273 static int raw_is_inserted(BlockDriverState *bs)
1274 {
1275     return 1;
1276 }
1277
1278 static int raw_media_changed(BlockDriverState *bs)
1279 {
1280     return -ENOTSUP;
1281 }
1282
1283 static int raw_eject(BlockDriverState *bs, int eject_flag)
1284 {
1285     DWORD ret_count;
1286
1287     if (s->type == FTYPE_FILE)
1288         return -ENOTSUP;
1289     if (eject_flag) {
1290         DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
1291                         NULL, 0, NULL, 0, &lpBytesReturned, NULL);
1292     } else {
1293         DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
1294                         NULL, 0, NULL, 0, &lpBytesReturned, NULL);
1295     }
1296 }
1297
1298 static int raw_set_locked(BlockDriverState *bs, int locked)
1299 {
1300     return -ENOTSUP;
1301 }
1302 #endif
1303
1304 BlockDriver bdrv_host_device = {
1305     "host_device",
1306     sizeof(BDRVRawState),
1307     NULL, /* no probe for protocols */
1308     hdev_open,
1309     NULL,
1310     NULL,
1311     raw_close,
1312     NULL,
1313     raw_flush,
1314
1315 #if 0
1316     .bdrv_aio_read = raw_aio_read,
1317     .bdrv_aio_write = raw_aio_write,
1318     .bdrv_aio_cancel = raw_aio_cancel,
1319     .aiocb_size = sizeof(RawAIOCB);
1320 #endif
1321     .bdrv_pread = raw_pread,
1322     .bdrv_pwrite = raw_pwrite,
1323     .bdrv_getlength = raw_getlength,
1324 };
1325 #endif /* _WIN32 */