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