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"
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
50 #include <sys/ioctl.h>
51 #include <linux/cdrom.h>
54 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
61 #include <sys/ioctl.h>
62 #include <sys/disklabel.h>
67 #include <sys/ioctl.h>
68 #include <sys/diskslice.h>
71 //#define DEBUG_FLOPPY
74 #if defined(DEBUG_BLOCK)
75 #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \
76 { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0)
78 #define DEBUG_BLOCK_PRINT(formatCstr, ...)
81 /* OS X does not have O_DSYNC */
84 #define O_DSYNC O_SYNC
85 #elif defined(O_FSYNC)
86 #define O_DSYNC O_FSYNC
90 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
92 #define O_DIRECT O_DSYNC
99 #define ALIGNED_BUFFER_SIZE (32 * 512)
101 /* if the FD is not accessed during that time (in ms), we try to
102 reopen it to see if the disk has been changed */
103 #define FD_OPEN_TIMEOUT 1000
105 typedef struct BDRVRawState {
109 #if defined(__linux__)
110 /* linux floppy specific */
111 int64_t fd_open_time;
112 int64_t fd_error_time;
114 int fd_media_changed;
116 #ifdef CONFIG_LINUX_AIO
120 uint8_t* aligned_buf;
123 static int fd_open(BlockDriverState *bs);
124 static int64_t raw_getlength(BlockDriverState *bs);
126 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
127 static int cdrom_reopen(BlockDriverState *bs);
130 static int raw_open_common(BlockDriverState *bs, const char *filename,
131 int bdrv_flags, int open_flags)
133 BDRVRawState *s = bs->opaque;
136 s->open_flags = open_flags | O_BINARY;
137 s->open_flags &= ~O_ACCMODE;
138 if (bdrv_flags & BDRV_O_RDWR) {
139 s->open_flags |= O_RDWR;
141 s->open_flags |= O_RDONLY;
144 /* Use O_DSYNC for write-through caching, no flags for write-back caching,
145 * and O_DIRECT for no caching. */
146 if ((bdrv_flags & BDRV_O_NOCACHE))
147 s->open_flags |= O_DIRECT;
148 else if (!(bdrv_flags & BDRV_O_CACHE_WB))
149 s->open_flags |= O_DSYNC;
152 fd = qemu_open(filename, s->open_flags, 0644);
160 s->aligned_buf = NULL;
162 if ((bdrv_flags & BDRV_O_NOCACHE)) {
163 s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
164 if (s->aligned_buf == NULL) {
169 #ifdef CONFIG_LINUX_AIO
170 if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
171 (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
173 /* We're falling back to POSIX AIO in some cases */
176 s->aio_ctx = laio_init();
184 if (paio_init() < 0) {
187 #ifdef CONFIG_LINUX_AIO
195 qemu_vfree(s->aligned_buf);
201 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
203 BDRVRawState *s = bs->opaque;
205 s->type = FTYPE_FILE;
206 return raw_open_common(bs, filename, flags, 0);
209 /* XXX: use host sector size if necessary with:
210 #ifdef DIOCGSECTORSIZE
212 unsigned int sectorsize = 512;
213 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
214 sectorsize > bufsize)
215 bufsize = sectorsize;
219 uint32_t blockSize = 512;
220 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
227 * offset and count are in bytes, but must be multiples of 512 for files
228 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
230 * This function may be called without alignment if the caller ensures
231 * that O_DIRECT is not in effect.
233 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
234 uint8_t *buf, int count)
236 BDRVRawState *s = bs->opaque;
243 ret = pread(s->fd, buf, count, offset);
247 /* Allow reads beyond the end (needed for pwrite) */
248 if ((ret == 0) && bs->growable) {
249 int64_t size = raw_getlength(bs);
250 if (offset >= size) {
251 memset(buf, 0, count);
256 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
257 "] read failed %d : %d = %s\n",
258 s->fd, bs->filename, offset, buf, count,
259 bs->total_sectors, ret, errno, strerror(errno));
261 /* Try harder for CDrom. */
262 if (s->type != FTYPE_FILE) {
263 ret = pread(s->fd, buf, count, offset);
266 ret = pread(s->fd, buf, count, offset);
270 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
271 "] retry read failed %d : %d = %s\n",
272 s->fd, bs->filename, offset, buf, count,
273 bs->total_sectors, ret, errno, strerror(errno));
276 return (ret < 0) ? -errno : ret;
280 * offset and count are in bytes, but must be multiples of 512 for files
281 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
283 * This function may be called without alignment if the caller ensures
284 * that O_DIRECT is not in effect.
286 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
287 const uint8_t *buf, int count)
289 BDRVRawState *s = bs->opaque;
296 ret = pwrite(s->fd, buf, count, offset);
300 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
301 "] write failed %d : %d = %s\n",
302 s->fd, bs->filename, offset, buf, count,
303 bs->total_sectors, ret, errno, strerror(errno));
305 return (ret < 0) ? -errno : ret;
310 * offset and count are in bytes and possibly not aligned. For files opened
311 * with O_DIRECT, necessary alignments are ensured before calling
312 * raw_pread_aligned to do the actual read.
314 static int raw_pread(BlockDriverState *bs, int64_t offset,
315 uint8_t *buf, int count)
317 BDRVRawState *s = bs->opaque;
318 int size, ret, shift, sum;
322 if (s->aligned_buf != NULL) {
324 if (offset & 0x1ff) {
325 /* align offset on a 512 bytes boundary */
327 shift = offset & 0x1ff;
328 size = (shift + count + 0x1ff) & ~0x1ff;
329 if (size > ALIGNED_BUFFER_SIZE)
330 size = ALIGNED_BUFFER_SIZE;
331 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
338 memcpy(buf, s->aligned_buf + shift, size);
348 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
350 /* read on aligned buffer */
354 size = (count + 0x1ff) & ~0x1ff;
355 if (size > ALIGNED_BUFFER_SIZE)
356 size = ALIGNED_BUFFER_SIZE;
358 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
361 } else if (ret == 0) {
362 fprintf(stderr, "raw_pread: read beyond end of file\n");
370 memcpy(buf, s->aligned_buf, size);
382 return raw_pread_aligned(bs, offset, buf, count) + sum;
385 static int raw_read(BlockDriverState *bs, int64_t sector_num,
386 uint8_t *buf, int nb_sectors)
390 ret = raw_pread(bs, sector_num * BDRV_SECTOR_SIZE, buf,
391 nb_sectors * BDRV_SECTOR_SIZE);
392 if (ret == (nb_sectors * BDRV_SECTOR_SIZE))
398 * offset and count are in bytes and possibly not aligned. For files opened
399 * with O_DIRECT, necessary alignments are ensured before calling
400 * raw_pwrite_aligned to do the actual write.
402 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
403 const uint8_t *buf, int count)
405 BDRVRawState *s = bs->opaque;
406 int size, ret, shift, sum;
410 if (s->aligned_buf != NULL) {
412 if (offset & 0x1ff) {
413 /* align offset on a 512 bytes boundary */
414 shift = offset & 0x1ff;
415 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
422 memcpy(s->aligned_buf + shift, buf, size);
424 ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
436 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
438 while ((size = (count & ~0x1ff)) != 0) {
440 if (size > ALIGNED_BUFFER_SIZE)
441 size = ALIGNED_BUFFER_SIZE;
443 memcpy(s->aligned_buf, buf, size);
445 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
454 /* here, count < 512 because (count & ~0x1ff) == 0 */
456 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
459 memcpy(s->aligned_buf, buf, count);
461 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
472 return raw_pwrite_aligned(bs, offset, buf, count) + sum;
475 static int raw_write(BlockDriverState *bs, int64_t sector_num,
476 const uint8_t *buf, int nb_sectors)
479 ret = raw_pwrite(bs, sector_num * BDRV_SECTOR_SIZE, buf,
480 nb_sectors * BDRV_SECTOR_SIZE);
481 if (ret == (nb_sectors * BDRV_SECTOR_SIZE))
487 * Check if all memory in this vector is sector aligned.
489 static int qiov_is_aligned(QEMUIOVector *qiov)
493 for (i = 0; i < qiov->niov; i++) {
494 if ((uintptr_t) qiov->iov[i].iov_base % BDRV_SECTOR_SIZE) {
502 static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
503 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
504 BlockDriverCompletionFunc *cb, void *opaque, int type)
506 BDRVRawState *s = bs->opaque;
512 * If O_DIRECT is used the buffer needs to be aligned on a sector
513 * boundary. Check if this is the case or telll the low-level
514 * driver that it needs to copy the buffer.
516 if (s->aligned_buf) {
517 if (!qiov_is_aligned(qiov)) {
518 type |= QEMU_AIO_MISALIGNED;
519 #ifdef CONFIG_LINUX_AIO
520 } else if (s->use_aio) {
521 return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
522 nb_sectors, cb, opaque, type);
527 return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
531 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
532 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
533 BlockDriverCompletionFunc *cb, void *opaque)
535 return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
536 cb, opaque, QEMU_AIO_READ);
539 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
540 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
541 BlockDriverCompletionFunc *cb, void *opaque)
543 return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
544 cb, opaque, QEMU_AIO_WRITE);
547 static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
548 BlockDriverCompletionFunc *cb, void *opaque)
550 BDRVRawState *s = bs->opaque;
555 return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
558 static void raw_close(BlockDriverState *bs)
560 BDRVRawState *s = bs->opaque;
564 if (s->aligned_buf != NULL)
565 qemu_vfree(s->aligned_buf);
569 static int raw_truncate(BlockDriverState *bs, int64_t offset)
571 BDRVRawState *s = bs->opaque;
572 if (s->type != FTYPE_FILE)
574 if (ftruncate(s->fd, offset) < 0)
580 static int64_t raw_getlength(BlockDriverState *bs)
582 BDRVRawState *s = bs->opaque;
588 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
591 if (ioctl(fd, DIOCGDINFO, &dl))
593 return (uint64_t)dl.d_secsize *
594 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
598 #elif defined(__sun__)
599 static int64_t raw_getlength(BlockDriverState *bs)
601 BDRVRawState *s = bs->opaque;
602 struct dk_minfo minfo;
611 * Use the DKIOCGMEDIAINFO ioctl to read the size.
613 ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo);
615 return minfo.dki_lbsize * minfo.dki_capacity;
619 * There are reports that lseek on some devices fails, but
620 * irc discussion said that contingency on contingency was overkill.
622 return lseek(s->fd, 0, SEEK_END);
624 #elif defined(CONFIG_BSD)
625 static int64_t raw_getlength(BlockDriverState *bs)
627 BDRVRawState *s = bs->opaque;
631 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
640 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
643 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
644 #ifdef DIOCGMEDIASIZE
645 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
646 #elif defined(DIOCGPART)
649 if (ioctl(fd, DIOCGPART, &pi) == 0)
650 size = pi.media_size;
657 size = LONG_LONG_MAX;
659 size = lseek(fd, 0LL, SEEK_END);
661 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
664 /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
665 if (size == 2048LL * (unsigned)-1)
667 /* XXX no disc? maybe we need to reopen... */
668 if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
675 size = lseek(fd, 0, SEEK_END);
680 static int64_t raw_getlength(BlockDriverState *bs)
682 BDRVRawState *s = bs->opaque;
690 return lseek(s->fd, 0, SEEK_END);
694 static int raw_create(const char *filename, QEMUOptionParameter *options)
698 int64_t total_size = 0;
700 /* Read out options */
701 while (options && options->name) {
702 if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
703 total_size = options->value.n / BDRV_SECTOR_SIZE;
708 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
713 if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) {
716 if (close(fd) != 0) {
723 static void raw_flush(BlockDriverState *bs)
725 BDRVRawState *s = bs->opaque;
726 qemu_fdatasync(s->fd);
730 static QEMUOptionParameter raw_create_options[] = {
732 .name = BLOCK_OPT_SIZE,
734 .help = "Virtual disk size"
739 static BlockDriver bdrv_file = {
740 .format_name = "file",
741 .protocol_name = "file",
742 .instance_size = sizeof(BDRVRawState),
743 .bdrv_probe = NULL, /* no probe for protocols */
744 .bdrv_file_open = raw_open,
745 .bdrv_read = raw_read,
746 .bdrv_write = raw_write,
747 .bdrv_close = raw_close,
748 .bdrv_create = raw_create,
749 .bdrv_flush = raw_flush,
751 .bdrv_aio_readv = raw_aio_readv,
752 .bdrv_aio_writev = raw_aio_writev,
753 .bdrv_aio_flush = raw_aio_flush,
755 .bdrv_truncate = raw_truncate,
756 .bdrv_getlength = raw_getlength,
758 .create_options = raw_create_options,
761 /***********************************************/
765 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
766 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
768 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
770 kern_return_t kernResult;
771 mach_port_t masterPort;
772 CFMutableDictionaryRef classesToMatch;
774 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
775 if ( KERN_SUCCESS != kernResult ) {
776 printf( "IOMasterPort returned %d\n", kernResult );
779 classesToMatch = IOServiceMatching( kIOCDMediaClass );
780 if ( classesToMatch == NULL ) {
781 printf( "IOServiceMatching returned a NULL dictionary.\n" );
783 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
785 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
786 if ( KERN_SUCCESS != kernResult )
788 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
794 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
796 io_object_t nextMedia;
797 kern_return_t kernResult = KERN_FAILURE;
799 nextMedia = IOIteratorNext( mediaIterator );
802 CFTypeRef bsdPathAsCFString;
803 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
804 if ( bsdPathAsCFString ) {
805 size_t devPathLength;
806 strcpy( bsdPath, _PATH_DEV );
807 strcat( bsdPath, "r" );
808 devPathLength = strlen( bsdPath );
809 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
810 kernResult = KERN_SUCCESS;
812 CFRelease( bsdPathAsCFString );
814 IOObjectRelease( nextMedia );
822 static int hdev_probe_device(const char *filename)
826 /* allow a dedicated CD-ROM driver to match with a higher priority */
827 if (strstart(filename, "/dev/cdrom", NULL))
830 if (stat(filename, &st) >= 0 &&
831 (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
838 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
840 BDRVRawState *s = bs->opaque;
843 if (strstart(filename, "/dev/cdrom", NULL)) {
844 kern_return_t kernResult;
845 io_iterator_t mediaIterator;
846 char bsdPath[ MAXPATHLEN ];
849 kernResult = FindEjectableCDMedia( &mediaIterator );
850 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
852 if ( bsdPath[ 0 ] != '\0' ) {
853 strcat(bsdPath,"s0");
854 /* some CDs don't have a partition 0 */
855 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
857 bsdPath[strlen(bsdPath)-1] = '1';
865 IOObjectRelease( mediaIterator );
869 s->type = FTYPE_FILE;
870 #if defined(__linux__)
871 if (strstart(filename, "/dev/sg", NULL)) {
876 return raw_open_common(bs, filename, flags, 0);
879 #if defined(__linux__)
880 /* Note: we do not have a reliable method to detect if the floppy is
881 present. The current method is to try to open the floppy at every
882 I/O and to keep it opened during a few hundreds of ms. */
883 static int fd_open(BlockDriverState *bs)
885 BDRVRawState *s = bs->opaque;
886 int last_media_present;
888 if (s->type != FTYPE_FD)
890 last_media_present = (s->fd >= 0);
892 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
896 printf("Floppy closed\n");
900 if (s->fd_got_error &&
901 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
903 printf("No floppy (open delayed)\n");
907 s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK);
909 s->fd_error_time = qemu_get_clock(rt_clock);
911 if (last_media_present)
912 s->fd_media_changed = 1;
914 printf("No floppy\n");
919 printf("Floppy opened\n");
922 if (!last_media_present)
923 s->fd_media_changed = 1;
924 s->fd_open_time = qemu_get_clock(rt_clock);
929 static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
931 BDRVRawState *s = bs->opaque;
933 return ioctl(s->fd, req, buf);
936 static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
937 unsigned long int req, void *buf,
938 BlockDriverCompletionFunc *cb, void *opaque)
940 BDRVRawState *s = bs->opaque;
944 return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
947 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
948 static int fd_open(BlockDriverState *bs)
950 BDRVRawState *s = bs->opaque;
952 /* this is just to ensure s->fd is sane (its called by io ops) */
957 #else /* !linux && !FreeBSD */
959 static int fd_open(BlockDriverState *bs)
964 #endif /* !linux && !FreeBSD */
966 static int hdev_create(const char *filename, QEMUOptionParameter *options)
970 struct stat stat_buf;
971 int64_t total_size = 0;
973 /* Read out options */
974 while (options && options->name) {
975 if (!strcmp(options->name, "size")) {
976 total_size = options->value.n / BDRV_SECTOR_SIZE;
981 fd = open(filename, O_WRONLY | O_BINARY);
985 if (fstat(fd, &stat_buf) < 0)
987 else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
989 else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE)
996 static BlockDriver bdrv_host_device = {
997 .format_name = "host_device",
998 .protocol_name = "host_device",
999 .instance_size = sizeof(BDRVRawState),
1000 .bdrv_probe_device = hdev_probe_device,
1001 .bdrv_file_open = hdev_open,
1002 .bdrv_close = raw_close,
1003 .bdrv_create = hdev_create,
1004 .create_options = raw_create_options,
1006 .bdrv_flush = raw_flush,
1008 .bdrv_aio_readv = raw_aio_readv,
1009 .bdrv_aio_writev = raw_aio_writev,
1010 .bdrv_aio_flush = raw_aio_flush,
1012 .bdrv_read = raw_read,
1013 .bdrv_write = raw_write,
1014 .bdrv_getlength = raw_getlength,
1016 /* generic scsi device */
1018 .bdrv_ioctl = hdev_ioctl,
1019 .bdrv_aio_ioctl = hdev_aio_ioctl,
1024 static int floppy_open(BlockDriverState *bs, const char *filename, int flags)
1026 BDRVRawState *s = bs->opaque;
1031 /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
1032 ret = raw_open_common(bs, filename, flags, O_NONBLOCK);
1036 /* close fd so that we can reopen it as needed */
1039 s->fd_media_changed = 1;
1044 static int floppy_probe_device(const char *filename)
1048 struct floppy_struct fdparam;
1050 if (strstart(filename, "/dev/fd", NULL))
1053 fd = open(filename, O_RDONLY | O_NONBLOCK);
1058 /* Attempt to detect via a floppy specific ioctl */
1059 ret = ioctl(fd, FDGETPRM, &fdparam);
1069 static int floppy_is_inserted(BlockDriverState *bs)
1071 return fd_open(bs) >= 0;
1074 static int floppy_media_changed(BlockDriverState *bs)
1076 BDRVRawState *s = bs->opaque;
1080 * XXX: we do not have a true media changed indication.
1081 * It does not work if the floppy is changed without trying to read it.
1084 ret = s->fd_media_changed;
1085 s->fd_media_changed = 0;
1087 printf("Floppy changed=%d\n", ret);
1092 static int floppy_eject(BlockDriverState *bs, int eject_flag)
1094 BDRVRawState *s = bs->opaque;
1101 fd = open(bs->filename, s->open_flags | O_NONBLOCK);
1103 if (ioctl(fd, FDEJECT, 0) < 0)
1111 static BlockDriver bdrv_host_floppy = {
1112 .format_name = "host_floppy",
1113 .protocol_name = "host_floppy",
1114 .instance_size = sizeof(BDRVRawState),
1115 .bdrv_probe_device = floppy_probe_device,
1116 .bdrv_file_open = floppy_open,
1117 .bdrv_close = raw_close,
1118 .bdrv_create = hdev_create,
1119 .create_options = raw_create_options,
1121 .bdrv_flush = raw_flush,
1123 .bdrv_aio_readv = raw_aio_readv,
1124 .bdrv_aio_writev = raw_aio_writev,
1125 .bdrv_aio_flush = raw_aio_flush,
1127 .bdrv_read = raw_read,
1128 .bdrv_write = raw_write,
1129 .bdrv_getlength = raw_getlength,
1131 /* removable device support */
1132 .bdrv_is_inserted = floppy_is_inserted,
1133 .bdrv_media_changed = floppy_media_changed,
1134 .bdrv_eject = floppy_eject,
1137 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1139 BDRVRawState *s = bs->opaque;
1143 /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
1144 return raw_open_common(bs, filename, flags, O_NONBLOCK);
1147 static int cdrom_probe_device(const char *filename)
1152 if (strstart(filename, "/dev/cd", NULL))
1155 fd = open(filename, O_RDONLY | O_NONBLOCK);
1160 /* Attempt to detect via a CDROM specific ioctl */
1161 ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1170 static int cdrom_is_inserted(BlockDriverState *bs)
1172 BDRVRawState *s = bs->opaque;
1175 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1176 if (ret == CDS_DISC_OK)
1181 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1183 BDRVRawState *s = bs->opaque;
1186 if (ioctl(s->fd, CDROMEJECT, NULL) < 0)
1187 perror("CDROMEJECT");
1189 if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0)
1190 perror("CDROMEJECT");
1196 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1198 BDRVRawState *s = bs->opaque;
1200 if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) {
1202 * Note: an error can happen if the distribution automatically
1205 /* 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,
1221 .bdrv_flush = raw_flush,
1223 .bdrv_aio_readv = raw_aio_readv,
1224 .bdrv_aio_writev = raw_aio_writev,
1225 .bdrv_aio_flush = raw_aio_flush,
1227 .bdrv_read = raw_read,
1228 .bdrv_write = raw_write,
1229 .bdrv_getlength = raw_getlength,
1231 /* removable device support */
1232 .bdrv_is_inserted = cdrom_is_inserted,
1233 .bdrv_eject = cdrom_eject,
1234 .bdrv_set_locked = cdrom_set_locked,
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 isnt 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 isnt 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 int cdrom_eject(BlockDriverState *bs, int 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");
1312 if (cdrom_reopen(bs) < 0)
1317 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1319 BDRVRawState *s = bs->opaque;
1323 if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1325 * Note: an error can happen if the distribution automatically
1328 /* perror("CDROM_LOCKDOOR"); */
1334 static BlockDriver bdrv_host_cdrom = {
1335 .format_name = "host_cdrom",
1336 .protocol_name = "host_cdrom",
1337 .instance_size = sizeof(BDRVRawState),
1338 .bdrv_probe_device = cdrom_probe_device,
1339 .bdrv_file_open = cdrom_open,
1340 .bdrv_close = raw_close,
1341 .bdrv_create = hdev_create,
1342 .create_options = raw_create_options,
1344 .bdrv_flush = raw_flush,
1346 .bdrv_aio_readv = raw_aio_readv,
1347 .bdrv_aio_writev = raw_aio_writev,
1348 .bdrv_aio_flush = raw_aio_flush,
1350 .bdrv_read = raw_read,
1351 .bdrv_write = raw_write,
1352 .bdrv_getlength = raw_getlength,
1354 /* removable device support */
1355 .bdrv_is_inserted = cdrom_is_inserted,
1356 .bdrv_eject = cdrom_eject,
1357 .bdrv_set_locked = cdrom_set_locked,
1359 #endif /* __FreeBSD__ */
1361 static void bdrv_file_init(void)
1364 * Register all the drivers. Note that order is important, the driver
1365 * registered last will get probed first.
1367 bdrv_register(&bdrv_file);
1368 bdrv_register(&bdrv_host_device);
1370 bdrv_register(&bdrv_host_floppy);
1371 bdrv_register(&bdrv_host_cdrom);
1373 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
1374 bdrv_register(&bdrv_host_cdrom);
1378 block_init(bdrv_file_init);