2 * Block driver for RAW files (posix)
4 * Copyright (c) 2006 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
24 #include "qemu-common.h"
25 #include "qemu-timer.h"
26 #include "qemu-char.h"
28 #include "block_int.h"
30 #include "block/raw-posix-aio.h"
32 #if defined(__APPLE__) && (__MACH__)
34 #include <sys/param.h>
35 #include <IOKit/IOKitLib.h>
36 #include <IOKit/IOBSD.h>
37 #include <IOKit/storage/IOMediaBSDClient.h>
38 #include <IOKit/storage/IOMedia.h>
39 #include <IOKit/storage/IOCDMedia.h>
40 //#include <IOKit/storage/IOCDTypes.h>
41 #include <CoreFoundation/CoreFoundation.h>
45 #define _POSIX_PTHREAD_SEMANTICS 1
49 #include <sys/types.h>
51 #include <sys/ioctl.h>
52 #include <sys/param.h>
53 #include <linux/cdrom.h>
58 #include <linux/fiemap.h>
60 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
66 #include <sys/ioctl.h>
67 #include <sys/disklabel.h>
72 #include <sys/ioctl.h>
73 #include <sys/disklabel.h>
79 #include <sys/ioctl.h>
80 #include <sys/diskslice.h>
87 //#define DEBUG_FLOPPY
90 #if defined(DEBUG_BLOCK)
91 #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \
92 { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0)
94 #define DEBUG_BLOCK_PRINT(formatCstr, ...)
97 /* OS X does not have O_DSYNC */
100 #define O_DSYNC O_SYNC
101 #elif defined(O_FSYNC)
102 #define O_DSYNC O_FSYNC
106 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
108 #define O_DIRECT O_DSYNC
115 /* if the FD is not accessed during that time (in ns), we try to
116 reopen it to see if the disk has been changed */
117 #define FD_OPEN_TIMEOUT (1000000000)
119 #define MAX_BLOCKSIZE 4096
121 typedef struct BDRVRawState
{
125 #if defined(__linux__)
126 /* linux floppy specific */
127 int64_t fd_open_time
;
128 int64_t fd_error_time
;
130 int fd_media_changed
;
132 #ifdef CONFIG_LINUX_AIO
136 uint8_t *aligned_buf
;
137 unsigned aligned_buf_size
;
143 static int fd_open(BlockDriverState
*bs
);
144 static int64_t raw_getlength(BlockDriverState
*bs
);
146 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
147 static int cdrom_reopen(BlockDriverState
*bs
);
150 #if defined(__NetBSD__)
151 static int raw_normalize_devicepath(const char **filename
)
153 static char namebuf
[PATH_MAX
];
154 const char *dp
, *fname
;
158 dp
= strrchr(fname
, '/');
159 if (lstat(fname
, &sb
) < 0) {
160 fprintf(stderr
, "%s: stat failed: %s\n",
161 fname
, strerror(errno
));
165 if (!S_ISBLK(sb
.st_mode
)) {
170 snprintf(namebuf
, PATH_MAX
, "r%s", fname
);
172 snprintf(namebuf
, PATH_MAX
, "%.*s/r%s",
173 (int)(dp
- fname
), fname
, dp
+ 1);
175 fprintf(stderr
, "%s is a block device", fname
);
177 fprintf(stderr
, ", using %s\n", *filename
);
182 static int raw_normalize_devicepath(const char **filename
)
188 static int raw_open_common(BlockDriverState
*bs
, const char *filename
,
189 int bdrv_flags
, int open_flags
)
191 BDRVRawState
*s
= bs
->opaque
;
194 ret
= raw_normalize_devicepath(&filename
);
199 s
->open_flags
= open_flags
| O_BINARY
;
200 s
->open_flags
&= ~O_ACCMODE
;
201 if (bdrv_flags
& BDRV_O_RDWR
) {
202 s
->open_flags
|= O_RDWR
;
204 s
->open_flags
|= O_RDONLY
;
207 /* Use O_DSYNC for write-through caching, no flags for write-back caching,
208 * and O_DIRECT for no caching. */
209 if ((bdrv_flags
& BDRV_O_NOCACHE
))
210 s
->open_flags
|= O_DIRECT
;
211 if (!(bdrv_flags
& BDRV_O_CACHE_WB
))
212 s
->open_flags
|= O_DSYNC
;
215 fd
= qemu_open(filename
, s
->open_flags
, 0644);
223 s
->aligned_buf
= NULL
;
225 if ((bdrv_flags
& BDRV_O_NOCACHE
)) {
227 * Allocate a buffer for read/modify/write cycles. Chose the size
228 * pessimistically as we don't know the block size yet.
230 s
->aligned_buf_size
= 32 * MAX_BLOCKSIZE
;
231 s
->aligned_buf
= qemu_memalign(MAX_BLOCKSIZE
, s
->aligned_buf_size
);
232 if (s
->aligned_buf
== NULL
) {
237 /* We're falling back to POSIX AIO in some cases so init always */
238 if (paio_init() < 0) {
242 #ifdef CONFIG_LINUX_AIO
244 * Currently Linux do AIO only for files opened with O_DIRECT
245 * specified so check NOCACHE flag too
247 if ((bdrv_flags
& (BDRV_O_NOCACHE
|BDRV_O_NATIVE_AIO
)) ==
248 (BDRV_O_NOCACHE
|BDRV_O_NATIVE_AIO
)) {
250 s
->aio_ctx
= laio_init();
258 #ifdef CONFIG_LINUX_AIO
264 if (platform_test_xfs_fd(s
->fd
)) {
272 qemu_vfree(s
->aligned_buf
);
278 static int raw_open(BlockDriverState
*bs
, const char *filename
, int flags
)
280 BDRVRawState
*s
= bs
->opaque
;
282 s
->type
= FTYPE_FILE
;
283 return raw_open_common(bs
, filename
, flags
, 0);
286 /* XXX: use host sector size if necessary with:
287 #ifdef DIOCGSECTORSIZE
289 unsigned int sectorsize = 512;
290 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
291 sectorsize > bufsize)
292 bufsize = sectorsize;
296 uint32_t blockSize = 512;
297 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
304 * Check if all memory in this vector is sector aligned.
306 static int qiov_is_aligned(BlockDriverState
*bs
, QEMUIOVector
*qiov
)
310 for (i
= 0; i
< qiov
->niov
; i
++) {
311 if ((uintptr_t) qiov
->iov
[i
].iov_base
% bs
->buffer_alignment
) {
319 static BlockDriverAIOCB
*raw_aio_submit(BlockDriverState
*bs
,
320 int64_t sector_num
, QEMUIOVector
*qiov
, int nb_sectors
,
321 BlockDriverCompletionFunc
*cb
, void *opaque
, int type
)
323 BDRVRawState
*s
= bs
->opaque
;
329 * If O_DIRECT is used the buffer needs to be aligned on a sector
330 * boundary. Check if this is the case or tell the low-level
331 * driver that it needs to copy the buffer.
333 if (s
->aligned_buf
) {
334 if (!qiov_is_aligned(bs
, qiov
)) {
335 type
|= QEMU_AIO_MISALIGNED
;
336 #ifdef CONFIG_LINUX_AIO
337 } else if (s
->use_aio
) {
338 return laio_submit(bs
, s
->aio_ctx
, s
->fd
, sector_num
, qiov
,
339 nb_sectors
, cb
, opaque
, type
);
344 return paio_submit(bs
, s
->fd
, sector_num
, qiov
, nb_sectors
,
348 static BlockDriverAIOCB
*raw_aio_readv(BlockDriverState
*bs
,
349 int64_t sector_num
, QEMUIOVector
*qiov
, int nb_sectors
,
350 BlockDriverCompletionFunc
*cb
, void *opaque
)
352 return raw_aio_submit(bs
, sector_num
, qiov
, nb_sectors
,
353 cb
, opaque
, QEMU_AIO_READ
);
356 static BlockDriverAIOCB
*raw_aio_writev(BlockDriverState
*bs
,
357 int64_t sector_num
, QEMUIOVector
*qiov
, int nb_sectors
,
358 BlockDriverCompletionFunc
*cb
, void *opaque
)
360 return raw_aio_submit(bs
, sector_num
, qiov
, nb_sectors
,
361 cb
, opaque
, QEMU_AIO_WRITE
);
364 static BlockDriverAIOCB
*raw_aio_flush(BlockDriverState
*bs
,
365 BlockDriverCompletionFunc
*cb
, void *opaque
)
367 BDRVRawState
*s
= bs
->opaque
;
372 return paio_submit(bs
, s
->fd
, 0, NULL
, 0, cb
, opaque
, QEMU_AIO_FLUSH
);
375 static void raw_close(BlockDriverState
*bs
)
377 BDRVRawState
*s
= bs
->opaque
;
381 if (s
->aligned_buf
!= NULL
)
382 qemu_vfree(s
->aligned_buf
);
386 static int raw_truncate(BlockDriverState
*bs
, int64_t offset
)
388 BDRVRawState
*s
= bs
->opaque
;
391 if (fstat(s
->fd
, &st
)) {
395 if (S_ISREG(st
.st_mode
)) {
396 if (ftruncate(s
->fd
, offset
) < 0) {
399 } else if (S_ISCHR(st
.st_mode
) || S_ISBLK(st
.st_mode
)) {
400 if (offset
> raw_getlength(bs
)) {
411 static int64_t raw_getlength(BlockDriverState
*bs
)
413 BDRVRawState
*s
= bs
->opaque
;
419 if (S_ISCHR(st
.st_mode
) || S_ISBLK(st
.st_mode
)) {
422 if (ioctl(fd
, DIOCGDINFO
, &dl
))
424 return (uint64_t)dl
.d_secsize
*
425 dl
.d_partitions
[DISKPART(st
.st_rdev
)].p_size
;
429 #elif defined(__NetBSD__)
430 static int64_t raw_getlength(BlockDriverState
*bs
)
432 BDRVRawState
*s
= bs
->opaque
;
438 if (S_ISCHR(st
.st_mode
) || S_ISBLK(st
.st_mode
)) {
439 struct dkwedge_info dkw
;
441 if (ioctl(fd
, DIOCGWEDGEINFO
, &dkw
) != -1) {
442 return dkw
.dkw_size
* 512;
446 if (ioctl(fd
, DIOCGDINFO
, &dl
))
448 return (uint64_t)dl
.d_secsize
*
449 dl
.d_partitions
[DISKPART(st
.st_rdev
)].p_size
;
454 #elif defined(__sun__)
455 static int64_t raw_getlength(BlockDriverState
*bs
)
457 BDRVRawState
*s
= bs
->opaque
;
458 struct dk_minfo minfo
;
467 * Use the DKIOCGMEDIAINFO ioctl to read the size.
469 ret
= ioctl(s
->fd
, DKIOCGMEDIAINFO
, &minfo
);
471 return minfo
.dki_lbsize
* minfo
.dki_capacity
;
475 * There are reports that lseek on some devices fails, but
476 * irc discussion said that contingency on contingency was overkill.
478 return lseek(s
->fd
, 0, SEEK_END
);
480 #elif defined(CONFIG_BSD)
481 static int64_t raw_getlength(BlockDriverState
*bs
)
483 BDRVRawState
*s
= bs
->opaque
;
487 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
496 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
499 if (!fstat(fd
, &sb
) && (S_IFCHR
& sb
.st_mode
)) {
500 #ifdef DIOCGMEDIASIZE
501 if (ioctl(fd
, DIOCGMEDIASIZE
, (off_t
*)&size
))
502 #elif defined(DIOCGPART)
505 if (ioctl(fd
, DIOCGPART
, &pi
) == 0)
506 size
= pi
.media_size
;
512 #if defined(__APPLE__) && defined(__MACH__)
513 size
= LONG_LONG_MAX
;
515 size
= lseek(fd
, 0LL, SEEK_END
);
517 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
520 /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
521 if (size
== 2048LL * (unsigned)-1)
523 /* XXX no disc? maybe we need to reopen... */
524 if (size
<= 0 && !reopened
&& cdrom_reopen(bs
) >= 0) {
531 size
= lseek(fd
, 0, SEEK_END
);
536 static int64_t raw_getlength(BlockDriverState
*bs
)
538 BDRVRawState
*s
= bs
->opaque
;
546 return lseek(s
->fd
, 0, SEEK_END
);
550 static int64_t raw_get_allocated_file_size(BlockDriverState
*bs
)
553 BDRVRawState
*s
= bs
->opaque
;
555 if (fstat(s
->fd
, &st
) < 0) {
558 return (int64_t)st
.st_blocks
* 512;
561 static int raw_create(const char *filename
, QEMUOptionParameter
*options
)
565 int64_t total_size
= 0;
567 /* Read out options */
568 while (options
&& options
->name
) {
569 if (!strcmp(options
->name
, BLOCK_OPT_SIZE
)) {
570 total_size
= options
->value
.n
/ BDRV_SECTOR_SIZE
;
575 fd
= open(filename
, O_WRONLY
| O_CREAT
| O_TRUNC
| O_BINARY
,
580 if (ftruncate(fd
, total_size
* BDRV_SECTOR_SIZE
) != 0) {
583 if (close(fd
) != 0) {
591 * Returns true iff the specified sector is present in the disk image. Drivers
592 * not implementing the functionality are assumed to not support backing files,
593 * hence all their sectors are reported as allocated.
595 * If 'sector_num' is beyond the end of the disk image the return value is 0
596 * and 'pnum' is set to 0.
598 * 'pnum' is set to the number of sectors (including and immediately following
599 * the specified sector) that are known to be in the same
600 * allocated/unallocated state.
602 * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
603 * beyond the end of the disk image it will be clamped.
605 static int coroutine_fn
raw_co_is_allocated(BlockDriverState
*bs
,
607 int nb_sectors
, int *pnum
)
609 BDRVRawState
*s
= bs
->opaque
;
610 off_t start
, data
, hole
;
618 start
= sector_num
* BDRV_SECTOR_SIZE
;
622 struct fiemap_extent fe
;
624 f
.fm
.fm_start
= start
;
625 f
.fm
.fm_length
= (int64_t)nb_sectors
* BDRV_SECTOR_SIZE
;
627 f
.fm
.fm_extent_count
= 1;
628 f
.fm
.fm_reserved
= 0;
629 if (ioctl(s
->fd
, FS_IOC_FIEMAP
, &f
) == -1) {
630 /* Assume everything is allocated. */
635 if (f
.fm
.fm_mapped_extents
== 0) {
636 /* No extents found, data is beyond f.fm.fm_start + f.fm.fm_length.
637 * f.fm.fm_start + f.fm.fm_length must be clamped to the file size!
639 off_t length
= lseek(s
->fd
, 0, SEEK_END
);
640 hole
= f
.fm
.fm_start
;
641 data
= MIN(f
.fm
.fm_start
+ f
.fm
.fm_length
, length
);
643 data
= f
.fe
.fe_logical
;
644 hole
= f
.fe
.fe_logical
+ f
.fe
.fe_length
;
646 #elif defined SEEK_HOLE && defined SEEK_DATA
647 hole
= lseek(s
->fd
, start
, SEEK_HOLE
);
649 /* -ENXIO indicates that sector_num was past the end of the file.
650 * There is a virtual hole there. */
651 assert(errno
!= -ENXIO
);
653 /* Most likely EINVAL. Assume everything is allocated. */
661 /* On a hole. We need another syscall to find its end. */
662 data
= lseek(s
->fd
, start
, SEEK_DATA
);
664 data
= lseek(s
->fd
, 0, SEEK_END
);
673 /* On a data extent, compute sectors to the end of the extent. */
674 *pnum
= MIN(nb_sectors
, (hole
- start
) / BDRV_SECTOR_SIZE
);
677 /* On a hole, compute sectors to the beginning of the next extent. */
678 *pnum
= MIN(nb_sectors
, (data
- start
) / BDRV_SECTOR_SIZE
);
684 static int xfs_discard(BDRVRawState
*s
, int64_t sector_num
, int nb_sectors
)
686 struct xfs_flock64 fl
;
688 memset(&fl
, 0, sizeof(fl
));
689 fl
.l_whence
= SEEK_SET
;
690 fl
.l_start
= sector_num
<< 9;
691 fl
.l_len
= (int64_t)nb_sectors
<< 9;
693 if (xfsctl(NULL
, s
->fd
, XFS_IOC_UNRESVSP64
, &fl
) < 0) {
694 DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno
));
702 static coroutine_fn
int raw_co_discard(BlockDriverState
*bs
,
703 int64_t sector_num
, int nb_sectors
)
706 BDRVRawState
*s
= bs
->opaque
;
709 return xfs_discard(s
, sector_num
, nb_sectors
);
716 static QEMUOptionParameter raw_create_options
[] = {
718 .name
= BLOCK_OPT_SIZE
,
720 .help
= "Virtual disk size"
725 static BlockDriver bdrv_file
= {
726 .format_name
= "file",
727 .protocol_name
= "file",
728 .instance_size
= sizeof(BDRVRawState
),
729 .bdrv_probe
= NULL
, /* no probe for protocols */
730 .bdrv_file_open
= raw_open
,
731 .bdrv_close
= raw_close
,
732 .bdrv_create
= raw_create
,
733 .bdrv_co_discard
= raw_co_discard
,
734 .bdrv_co_is_allocated
= raw_co_is_allocated
,
736 .bdrv_aio_readv
= raw_aio_readv
,
737 .bdrv_aio_writev
= raw_aio_writev
,
738 .bdrv_aio_flush
= raw_aio_flush
,
740 .bdrv_truncate
= raw_truncate
,
741 .bdrv_getlength
= raw_getlength
,
742 .bdrv_get_allocated_file_size
743 = raw_get_allocated_file_size
,
745 .create_options
= raw_create_options
,
748 /***********************************************/
751 #if defined(__APPLE__) && defined(__MACH__)
752 static kern_return_t
FindEjectableCDMedia( io_iterator_t
*mediaIterator
);
753 static kern_return_t
GetBSDPath( io_iterator_t mediaIterator
, char *bsdPath
, CFIndex maxPathSize
);
755 kern_return_t
FindEjectableCDMedia( io_iterator_t
*mediaIterator
)
757 kern_return_t kernResult
;
758 mach_port_t masterPort
;
759 CFMutableDictionaryRef classesToMatch
;
761 kernResult
= IOMasterPort( MACH_PORT_NULL
, &masterPort
);
762 if ( KERN_SUCCESS
!= kernResult
) {
763 printf( "IOMasterPort returned %d\n", kernResult
);
766 classesToMatch
= IOServiceMatching( kIOCDMediaClass
);
767 if ( classesToMatch
== NULL
) {
768 printf( "IOServiceMatching returned a NULL dictionary.\n" );
770 CFDictionarySetValue( classesToMatch
, CFSTR( kIOMediaEjectableKey
), kCFBooleanTrue
);
772 kernResult
= IOServiceGetMatchingServices( masterPort
, classesToMatch
, mediaIterator
);
773 if ( KERN_SUCCESS
!= kernResult
)
775 printf( "IOServiceGetMatchingServices returned %d\n", kernResult
);
781 kern_return_t
GetBSDPath( io_iterator_t mediaIterator
, char *bsdPath
, CFIndex maxPathSize
)
783 io_object_t nextMedia
;
784 kern_return_t kernResult
= KERN_FAILURE
;
786 nextMedia
= IOIteratorNext( mediaIterator
);
789 CFTypeRef bsdPathAsCFString
;
790 bsdPathAsCFString
= IORegistryEntryCreateCFProperty( nextMedia
, CFSTR( kIOBSDNameKey
), kCFAllocatorDefault
, 0 );
791 if ( bsdPathAsCFString
) {
792 size_t devPathLength
;
793 strcpy( bsdPath
, _PATH_DEV
);
794 strcat( bsdPath
, "r" );
795 devPathLength
= strlen( bsdPath
);
796 if ( CFStringGetCString( bsdPathAsCFString
, bsdPath
+ devPathLength
, maxPathSize
- devPathLength
, kCFStringEncodingASCII
) ) {
797 kernResult
= KERN_SUCCESS
;
799 CFRelease( bsdPathAsCFString
);
801 IOObjectRelease( nextMedia
);
809 static int hdev_probe_device(const char *filename
)
813 /* allow a dedicated CD-ROM driver to match with a higher priority */
814 if (strstart(filename
, "/dev/cdrom", NULL
))
817 if (stat(filename
, &st
) >= 0 &&
818 (S_ISCHR(st
.st_mode
) || S_ISBLK(st
.st_mode
))) {
825 static int hdev_open(BlockDriverState
*bs
, const char *filename
, int flags
)
827 BDRVRawState
*s
= bs
->opaque
;
829 #if defined(__APPLE__) && defined(__MACH__)
830 if (strstart(filename
, "/dev/cdrom", NULL
)) {
831 kern_return_t kernResult
;
832 io_iterator_t mediaIterator
;
833 char bsdPath
[ MAXPATHLEN
];
836 kernResult
= FindEjectableCDMedia( &mediaIterator
);
837 kernResult
= GetBSDPath( mediaIterator
, bsdPath
, sizeof( bsdPath
) );
839 if ( bsdPath
[ 0 ] != '\0' ) {
840 strcat(bsdPath
,"s0");
841 /* some CDs don't have a partition 0 */
842 fd
= open(bsdPath
, O_RDONLY
| O_BINARY
| O_LARGEFILE
);
844 bsdPath
[strlen(bsdPath
)-1] = '1';
852 IOObjectRelease( mediaIterator
);
856 s
->type
= FTYPE_FILE
;
857 #if defined(__linux__)
859 char resolved_path
[ MAXPATHLEN
], *temp
;
861 temp
= realpath(filename
, resolved_path
);
862 if (temp
&& strstart(temp
, "/dev/sg", NULL
)) {
868 return raw_open_common(bs
, filename
, flags
, 0);
871 #if defined(__linux__)
872 /* Note: we do not have a reliable method to detect if the floppy is
873 present. The current method is to try to open the floppy at every
874 I/O and to keep it opened during a few hundreds of ms. */
875 static int fd_open(BlockDriverState
*bs
)
877 BDRVRawState
*s
= bs
->opaque
;
878 int last_media_present
;
880 if (s
->type
!= FTYPE_FD
)
882 last_media_present
= (s
->fd
>= 0);
884 (get_clock() - s
->fd_open_time
) >= FD_OPEN_TIMEOUT
) {
888 printf("Floppy closed\n");
892 if (s
->fd_got_error
&&
893 (get_clock() - s
->fd_error_time
) < FD_OPEN_TIMEOUT
) {
895 printf("No floppy (open delayed)\n");
899 s
->fd
= open(bs
->filename
, s
->open_flags
& ~O_NONBLOCK
);
901 s
->fd_error_time
= get_clock();
903 if (last_media_present
)
904 s
->fd_media_changed
= 1;
906 printf("No floppy\n");
911 printf("Floppy opened\n");
914 if (!last_media_present
)
915 s
->fd_media_changed
= 1;
916 s
->fd_open_time
= get_clock();
921 static int hdev_ioctl(BlockDriverState
*bs
, unsigned long int req
, void *buf
)
923 BDRVRawState
*s
= bs
->opaque
;
925 return ioctl(s
->fd
, req
, buf
);
928 static BlockDriverAIOCB
*hdev_aio_ioctl(BlockDriverState
*bs
,
929 unsigned long int req
, void *buf
,
930 BlockDriverCompletionFunc
*cb
, void *opaque
)
932 BDRVRawState
*s
= bs
->opaque
;
936 return paio_ioctl(bs
, s
->fd
, req
, buf
, cb
, opaque
);
939 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
940 static int fd_open(BlockDriverState
*bs
)
942 BDRVRawState
*s
= bs
->opaque
;
944 /* this is just to ensure s->fd is sane (its called by io ops) */
949 #else /* !linux && !FreeBSD */
951 static int fd_open(BlockDriverState
*bs
)
956 #endif /* !linux && !FreeBSD */
958 static int hdev_create(const char *filename
, QEMUOptionParameter
*options
)
962 struct stat stat_buf
;
963 int64_t total_size
= 0;
965 /* Read out options */
966 while (options
&& options
->name
) {
967 if (!strcmp(options
->name
, "size")) {
968 total_size
= options
->value
.n
/ BDRV_SECTOR_SIZE
;
973 fd
= open(filename
, O_WRONLY
| O_BINARY
);
977 if (fstat(fd
, &stat_buf
) < 0)
979 else if (!S_ISBLK(stat_buf
.st_mode
) && !S_ISCHR(stat_buf
.st_mode
))
981 else if (lseek(fd
, 0, SEEK_END
) < total_size
* BDRV_SECTOR_SIZE
)
988 static int hdev_has_zero_init(BlockDriverState
*bs
)
993 static BlockDriver bdrv_host_device
= {
994 .format_name
= "host_device",
995 .protocol_name
= "host_device",
996 .instance_size
= sizeof(BDRVRawState
),
997 .bdrv_probe_device
= hdev_probe_device
,
998 .bdrv_file_open
= hdev_open
,
999 .bdrv_close
= raw_close
,
1000 .bdrv_create
= hdev_create
,
1001 .create_options
= raw_create_options
,
1002 .bdrv_has_zero_init
= hdev_has_zero_init
,
1004 .bdrv_aio_readv
= raw_aio_readv
,
1005 .bdrv_aio_writev
= raw_aio_writev
,
1006 .bdrv_aio_flush
= raw_aio_flush
,
1008 .bdrv_truncate
= raw_truncate
,
1009 .bdrv_getlength
= raw_getlength
,
1010 .bdrv_get_allocated_file_size
1011 = raw_get_allocated_file_size
,
1013 /* generic scsi device */
1015 .bdrv_ioctl
= hdev_ioctl
,
1016 .bdrv_aio_ioctl
= hdev_aio_ioctl
,
1021 static int floppy_open(BlockDriverState
*bs
, const char *filename
, int flags
)
1023 BDRVRawState
*s
= bs
->opaque
;
1028 /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
1029 ret
= raw_open_common(bs
, filename
, flags
, O_NONBLOCK
);
1033 /* close fd so that we can reopen it as needed */
1036 s
->fd_media_changed
= 1;
1041 static int floppy_probe_device(const char *filename
)
1045 struct floppy_struct fdparam
;
1048 if (strstart(filename
, "/dev/fd", NULL
))
1051 fd
= open(filename
, O_RDONLY
| O_NONBLOCK
);
1055 ret
= fstat(fd
, &st
);
1056 if (ret
== -1 || !S_ISBLK(st
.st_mode
)) {
1060 /* Attempt to detect via a floppy specific ioctl */
1061 ret
= ioctl(fd
, FDGETPRM
, &fdparam
);
1072 static int floppy_is_inserted(BlockDriverState
*bs
)
1074 return fd_open(bs
) >= 0;
1077 static int floppy_media_changed(BlockDriverState
*bs
)
1079 BDRVRawState
*s
= bs
->opaque
;
1083 * XXX: we do not have a true media changed indication.
1084 * It does not work if the floppy is changed without trying to read it.
1087 ret
= s
->fd_media_changed
;
1088 s
->fd_media_changed
= 0;
1090 printf("Floppy changed=%d\n", ret
);
1095 static void floppy_eject(BlockDriverState
*bs
, bool eject_flag
)
1097 BDRVRawState
*s
= bs
->opaque
;
1104 fd
= open(bs
->filename
, s
->open_flags
| O_NONBLOCK
);
1106 if (ioctl(fd
, FDEJECT
, 0) < 0)
1112 static BlockDriver bdrv_host_floppy
= {
1113 .format_name
= "host_floppy",
1114 .protocol_name
= "host_floppy",
1115 .instance_size
= sizeof(BDRVRawState
),
1116 .bdrv_probe_device
= floppy_probe_device
,
1117 .bdrv_file_open
= floppy_open
,
1118 .bdrv_close
= raw_close
,
1119 .bdrv_create
= hdev_create
,
1120 .create_options
= raw_create_options
,
1121 .bdrv_has_zero_init
= hdev_has_zero_init
,
1123 .bdrv_aio_readv
= raw_aio_readv
,
1124 .bdrv_aio_writev
= raw_aio_writev
,
1125 .bdrv_aio_flush
= raw_aio_flush
,
1127 .bdrv_truncate
= raw_truncate
,
1128 .bdrv_getlength
= raw_getlength
,
1129 .bdrv_get_allocated_file_size
1130 = raw_get_allocated_file_size
,
1132 /* removable device support */
1133 .bdrv_is_inserted
= floppy_is_inserted
,
1134 .bdrv_media_changed
= floppy_media_changed
,
1135 .bdrv_eject
= floppy_eject
,
1138 static int cdrom_open(BlockDriverState
*bs
, const char *filename
, int flags
)
1140 BDRVRawState
*s
= bs
->opaque
;
1144 /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
1145 return raw_open_common(bs
, filename
, flags
, O_NONBLOCK
);
1148 static int cdrom_probe_device(const char *filename
)
1154 fd
= open(filename
, O_RDONLY
| O_NONBLOCK
);
1158 ret
= fstat(fd
, &st
);
1159 if (ret
== -1 || !S_ISBLK(st
.st_mode
)) {
1163 /* Attempt to detect via a CDROM specific ioctl */
1164 ret
= ioctl(fd
, CDROM_DRIVE_STATUS
, CDSL_CURRENT
);
1174 static int cdrom_is_inserted(BlockDriverState
*bs
)
1176 BDRVRawState
*s
= bs
->opaque
;
1179 ret
= ioctl(s
->fd
, CDROM_DRIVE_STATUS
, CDSL_CURRENT
);
1180 if (ret
== CDS_DISC_OK
)
1185 static void cdrom_eject(BlockDriverState
*bs
, bool eject_flag
)
1187 BDRVRawState
*s
= bs
->opaque
;
1190 if (ioctl(s
->fd
, CDROMEJECT
, NULL
) < 0)
1191 perror("CDROMEJECT");
1193 if (ioctl(s
->fd
, CDROMCLOSETRAY
, NULL
) < 0)
1194 perror("CDROMEJECT");
1198 static void cdrom_lock_medium(BlockDriverState
*bs
, bool locked
)
1200 BDRVRawState
*s
= bs
->opaque
;
1202 if (ioctl(s
->fd
, CDROM_LOCKDOOR
, locked
) < 0) {
1204 * Note: an error can happen if the distribution automatically
1207 /* perror("CDROM_LOCKDOOR"); */
1211 static BlockDriver bdrv_host_cdrom
= {
1212 .format_name
= "host_cdrom",
1213 .protocol_name
= "host_cdrom",
1214 .instance_size
= sizeof(BDRVRawState
),
1215 .bdrv_probe_device
= cdrom_probe_device
,
1216 .bdrv_file_open
= cdrom_open
,
1217 .bdrv_close
= raw_close
,
1218 .bdrv_create
= hdev_create
,
1219 .create_options
= raw_create_options
,
1220 .bdrv_has_zero_init
= hdev_has_zero_init
,
1222 .bdrv_aio_readv
= raw_aio_readv
,
1223 .bdrv_aio_writev
= raw_aio_writev
,
1224 .bdrv_aio_flush
= raw_aio_flush
,
1226 .bdrv_truncate
= raw_truncate
,
1227 .bdrv_getlength
= raw_getlength
,
1228 .bdrv_get_allocated_file_size
1229 = raw_get_allocated_file_size
,
1231 /* removable device support */
1232 .bdrv_is_inserted
= cdrom_is_inserted
,
1233 .bdrv_eject
= cdrom_eject
,
1234 .bdrv_lock_medium
= cdrom_lock_medium
,
1236 /* generic scsi device */
1237 .bdrv_ioctl
= hdev_ioctl
,
1238 .bdrv_aio_ioctl
= hdev_aio_ioctl
,
1240 #endif /* __linux__ */
1242 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
1243 static int cdrom_open(BlockDriverState
*bs
, const char *filename
, int flags
)
1245 BDRVRawState
*s
= bs
->opaque
;
1250 ret
= raw_open_common(bs
, filename
, flags
, 0);
1254 /* make sure the door isn't locked at this time */
1255 ioctl(s
->fd
, CDIOCALLOW
);
1259 static int cdrom_probe_device(const char *filename
)
1261 if (strstart(filename
, "/dev/cd", NULL
) ||
1262 strstart(filename
, "/dev/acd", NULL
))
1267 static int cdrom_reopen(BlockDriverState
*bs
)
1269 BDRVRawState
*s
= bs
->opaque
;
1273 * Force reread of possibly changed/newly loaded disc,
1274 * FreeBSD seems to not notice sometimes...
1278 fd
= open(bs
->filename
, s
->open_flags
, 0644);
1285 /* make sure the door isn't locked at this time */
1286 ioctl(s
->fd
, CDIOCALLOW
);
1290 static int cdrom_is_inserted(BlockDriverState
*bs
)
1292 return raw_getlength(bs
) > 0;
1295 static void cdrom_eject(BlockDriverState
*bs
, bool eject_flag
)
1297 BDRVRawState
*s
= bs
->opaque
;
1302 (void) ioctl(s
->fd
, CDIOCALLOW
);
1305 if (ioctl(s
->fd
, CDIOCEJECT
) < 0)
1306 perror("CDIOCEJECT");
1308 if (ioctl(s
->fd
, CDIOCCLOSE
) < 0)
1309 perror("CDIOCCLOSE");
1315 static void cdrom_lock_medium(BlockDriverState
*bs
, bool locked
)
1317 BDRVRawState
*s
= bs
->opaque
;
1321 if (ioctl(s
->fd
, (locked
? CDIOCPREVENT
: CDIOCALLOW
)) < 0) {
1323 * Note: an error can happen if the distribution automatically
1326 /* perror("CDROM_LOCKDOOR"); */
1330 static BlockDriver bdrv_host_cdrom
= {
1331 .format_name
= "host_cdrom",
1332 .protocol_name
= "host_cdrom",
1333 .instance_size
= sizeof(BDRVRawState
),
1334 .bdrv_probe_device
= cdrom_probe_device
,
1335 .bdrv_file_open
= cdrom_open
,
1336 .bdrv_close
= raw_close
,
1337 .bdrv_create
= hdev_create
,
1338 .create_options
= raw_create_options
,
1339 .bdrv_has_zero_init
= hdev_has_zero_init
,
1341 .bdrv_aio_readv
= raw_aio_readv
,
1342 .bdrv_aio_writev
= raw_aio_writev
,
1343 .bdrv_aio_flush
= raw_aio_flush
,
1345 .bdrv_truncate
= raw_truncate
,
1346 .bdrv_getlength
= raw_getlength
,
1347 .bdrv_get_allocated_file_size
1348 = raw_get_allocated_file_size
,
1350 /* removable device support */
1351 .bdrv_is_inserted
= cdrom_is_inserted
,
1352 .bdrv_eject
= cdrom_eject
,
1353 .bdrv_lock_medium
= cdrom_lock_medium
,
1355 #endif /* __FreeBSD__ */
1357 static void bdrv_file_init(void)
1360 * Register all the drivers. Note that order is important, the driver
1361 * registered last will get probed first.
1363 bdrv_register(&bdrv_file
);
1364 bdrv_register(&bdrv_host_device
);
1366 bdrv_register(&bdrv_host_floppy
);
1367 bdrv_register(&bdrv_host_cdrom
);
1369 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
1370 bdrv_register(&bdrv_host_cdrom
);
1374 block_init(bdrv_file_init
);