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>
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 {
108 unsigned int lseek_err_cnt;
111 #if defined(__linux__)
112 /* linux floppy specific */
113 int64_t fd_open_time;
114 int64_t fd_error_time;
116 int fd_media_changed;
118 #ifdef CONFIG_LINUX_AIO
121 uint8_t* aligned_buf;
124 static int fd_open(BlockDriverState *bs);
125 static int64_t raw_getlength(BlockDriverState *bs);
127 #if defined(__FreeBSD__)
128 static int cdrom_reopen(BlockDriverState *bs);
131 static int raw_open_common(BlockDriverState *bs, const char *filename,
132 int bdrv_flags, int open_flags)
134 BDRVRawState *s = bs->opaque;
137 s->lseek_err_cnt = 0;
139 s->open_flags = open_flags | O_BINARY;
140 s->open_flags &= ~O_ACCMODE;
141 if ((bdrv_flags & BDRV_O_ACCESS) == BDRV_O_RDWR) {
142 s->open_flags |= O_RDWR;
144 s->open_flags |= O_RDONLY;
148 /* Use O_DSYNC for write-through caching, no flags for write-back caching,
149 * and O_DIRECT for no caching. */
150 if ((bdrv_flags & BDRV_O_NOCACHE))
151 s->open_flags |= O_DIRECT;
152 else if (!(bdrv_flags & BDRV_O_CACHE_WB))
153 s->open_flags |= O_DSYNC;
156 fd = open(filename, s->open_flags, 0644);
164 s->aligned_buf = NULL;
166 if ((bdrv_flags & BDRV_O_NOCACHE)) {
167 s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
168 if (s->aligned_buf == NULL) {
173 #ifdef CONFIG_LINUX_AIO
174 if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
175 (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
176 s->aio_ctx = laio_init();
184 s->aio_ctx = paio_init();
188 #ifdef CONFIG_LINUX_AIO
196 qemu_vfree(s->aligned_buf);
202 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
204 BDRVRawState *s = bs->opaque;
207 s->type = FTYPE_FILE;
208 if (flags & BDRV_O_CREAT)
209 open_flags = O_CREAT | O_TRUNC;
211 return raw_open_common(bs, filename, flags, open_flags);
214 /* XXX: use host sector size if necessary with:
215 #ifdef DIOCGSECTORSIZE
217 unsigned int sectorsize = 512;
218 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
219 sectorsize > bufsize)
220 bufsize = sectorsize;
224 u_int32_t blockSize = 512;
225 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
232 * offset and count are in bytes, but must be multiples of 512 for files
233 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
235 * This function may be called without alignment if the caller ensures
236 * that O_DIRECT is not in effect.
238 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
239 uint8_t *buf, int count)
241 BDRVRawState *s = bs->opaque;
248 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
249 ++(s->lseek_err_cnt);
250 if(s->lseek_err_cnt <= 10) {
251 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
252 "] lseek failed : %d = %s\n",
253 s->fd, bs->filename, offset, buf, count,
254 bs->total_sectors, errno, strerror(errno));
260 ret = read(s->fd, buf, count);
262 goto label__raw_read__success;
264 /* Allow reads beyond the end (needed for pwrite) */
265 if ((ret == 0) && bs->growable) {
266 int64_t size = raw_getlength(bs);
267 if (offset >= size) {
268 memset(buf, 0, count);
270 goto label__raw_read__success;
274 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
275 "] read failed %d : %d = %s\n",
276 s->fd, bs->filename, offset, buf, count,
277 bs->total_sectors, ret, errno, strerror(errno));
279 /* Try harder for CDrom. */
280 if (bs->type == BDRV_TYPE_CDROM) {
281 lseek(s->fd, offset, SEEK_SET);
282 ret = read(s->fd, buf, count);
284 goto label__raw_read__success;
285 lseek(s->fd, offset, SEEK_SET);
286 ret = read(s->fd, buf, count);
288 goto label__raw_read__success;
290 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
291 "] retry read failed %d : %d = %s\n",
292 s->fd, bs->filename, offset, buf, count,
293 bs->total_sectors, ret, errno, strerror(errno));
296 label__raw_read__success:
298 return (ret < 0) ? -errno : ret;
302 * offset and count are in bytes, but must be multiples of 512 for files
303 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
305 * This function may be called without alignment if the caller ensures
306 * that O_DIRECT is not in effect.
308 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
309 const uint8_t *buf, int count)
311 BDRVRawState *s = bs->opaque;
318 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
319 ++(s->lseek_err_cnt);
320 if(s->lseek_err_cnt) {
321 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
322 PRId64 "] lseek failed : %d = %s\n",
323 s->fd, bs->filename, offset, buf, count,
324 bs->total_sectors, errno, strerror(errno));
328 s->lseek_err_cnt = 0;
330 ret = write(s->fd, buf, count);
332 goto label__raw_write__success;
334 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
335 "] write failed %d : %d = %s\n",
336 s->fd, bs->filename, offset, buf, count,
337 bs->total_sectors, ret, errno, strerror(errno));
339 label__raw_write__success:
341 return (ret < 0) ? -errno : ret;
346 * offset and count are in bytes and possibly not aligned. For files opened
347 * with O_DIRECT, necessary alignments are ensured before calling
348 * raw_pread_aligned to do the actual read.
350 static int raw_pread(BlockDriverState *bs, int64_t offset,
351 uint8_t *buf, int count)
353 BDRVRawState *s = bs->opaque;
354 int size, ret, shift, sum;
358 if (s->aligned_buf != NULL) {
360 if (offset & 0x1ff) {
361 /* align offset on a 512 bytes boundary */
363 shift = offset & 0x1ff;
364 size = (shift + count + 0x1ff) & ~0x1ff;
365 if (size > ALIGNED_BUFFER_SIZE)
366 size = ALIGNED_BUFFER_SIZE;
367 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
374 memcpy(buf, s->aligned_buf + shift, size);
384 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
386 /* read on aligned buffer */
390 size = (count + 0x1ff) & ~0x1ff;
391 if (size > ALIGNED_BUFFER_SIZE)
392 size = ALIGNED_BUFFER_SIZE;
394 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
402 memcpy(buf, s->aligned_buf, size);
414 return raw_pread_aligned(bs, offset, buf, count) + sum;
417 static int raw_read(BlockDriverState *bs, int64_t sector_num,
418 uint8_t *buf, int nb_sectors)
422 ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
423 if (ret == (nb_sectors * 512))
429 * offset and count are in bytes and possibly not aligned. For files opened
430 * with O_DIRECT, necessary alignments are ensured before calling
431 * raw_pwrite_aligned to do the actual write.
433 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
434 const uint8_t *buf, int count)
436 BDRVRawState *s = bs->opaque;
437 int size, ret, shift, sum;
441 if (s->aligned_buf != NULL) {
443 if (offset & 0x1ff) {
444 /* align offset on a 512 bytes boundary */
445 shift = offset & 0x1ff;
446 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
453 memcpy(s->aligned_buf + shift, buf, size);
455 ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
467 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
469 while ((size = (count & ~0x1ff)) != 0) {
471 if (size > ALIGNED_BUFFER_SIZE)
472 size = ALIGNED_BUFFER_SIZE;
474 memcpy(s->aligned_buf, buf, size);
476 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
485 /* here, count < 512 because (count & ~0x1ff) == 0 */
487 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
490 memcpy(s->aligned_buf, buf, count);
492 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
503 return raw_pwrite_aligned(bs, offset, buf, count) + sum;
506 static int raw_write(BlockDriverState *bs, int64_t sector_num,
507 const uint8_t *buf, int nb_sectors)
510 ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
511 if (ret == (nb_sectors * 512))
517 * Check if all memory in this vector is sector aligned.
519 static int qiov_is_aligned(QEMUIOVector *qiov)
523 for (i = 0; i < qiov->niov; i++) {
524 if ((uintptr_t) qiov->iov[i].iov_base % 512) {
532 static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
533 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
534 BlockDriverCompletionFunc *cb, void *opaque, int type)
536 BDRVRawState *s = bs->opaque;
542 * If O_DIRECT is used the buffer needs to be aligned on a sector
543 * boundary. Check if this is the case or telll the low-level
544 * driver that it needs to copy the buffer.
546 if (s->aligned_buf) {
547 if (!qiov_is_aligned(qiov)) {
548 type |= QEMU_AIO_MISALIGNED;
549 #ifdef CONFIG_LINUX_AIO
550 } else if (s->use_aio) {
551 return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
552 nb_sectors, cb, opaque, type);
557 return paio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov, nb_sectors,
561 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
562 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
563 BlockDriverCompletionFunc *cb, void *opaque)
565 return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
566 cb, opaque, QEMU_AIO_READ);
569 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
570 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
571 BlockDriverCompletionFunc *cb, void *opaque)
573 return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
574 cb, opaque, QEMU_AIO_WRITE);
577 static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
578 BlockDriverCompletionFunc *cb, void *opaque)
580 BDRVRawState *s = bs->opaque;
585 return paio_submit(bs, s->aio_ctx, s->fd, 0, NULL, 0,
586 cb, opaque, QEMU_AIO_FLUSH);
589 static void raw_close(BlockDriverState *bs)
591 BDRVRawState *s = bs->opaque;
595 if (s->aligned_buf != NULL)
596 qemu_free(s->aligned_buf);
600 static int raw_truncate(BlockDriverState *bs, int64_t offset)
602 BDRVRawState *s = bs->opaque;
603 if (s->type != FTYPE_FILE)
605 if (ftruncate(s->fd, offset) < 0)
611 static int64_t raw_getlength(BlockDriverState *bs)
613 BDRVRawState *s = bs->opaque;
619 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
622 if (ioctl(fd, DIOCGDINFO, &dl))
624 return (uint64_t)dl.d_secsize *
625 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
629 #else /* !__OpenBSD__ */
630 static int64_t raw_getlength(BlockDriverState *bs)
632 BDRVRawState *s = bs->opaque;
642 struct dk_minfo minfo;
655 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
656 #ifdef DIOCGMEDIASIZE
657 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
658 #elif defined(DIOCGPART)
661 if (ioctl(fd, DIOCGPART, &pi) == 0)
662 size = pi.media_size;
669 size = LONG_LONG_MAX;
671 size = lseek(fd, 0LL, SEEK_END);
676 /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
677 if (size == 2048LL * (unsigned)-1)
679 /* XXX no disc? maybe we need to reopen... */
680 if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
690 * use the DKIOCGMEDIAINFO ioctl to read the size.
692 rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
694 size = minfo.dki_lbsize * minfo.dki_capacity;
695 } else /* there are reports that lseek on some devices
696 fails, but irc discussion said that contingency
697 on contingency was overkill */
700 size = lseek(fd, 0, SEEK_END);
706 static int raw_create(const char *filename, QEMUOptionParameter *options)
710 int64_t total_size = 0;
712 /* Read out options */
713 while (options && options->name) {
714 if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
715 total_size = options->value.n / 512;
720 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
725 if (ftruncate(fd, total_size * 512) != 0) {
728 if (close(fd) != 0) {
735 static void raw_flush(BlockDriverState *bs)
737 BDRVRawState *s = bs->opaque;
738 qemu_fdatasync(s->fd);
742 static QEMUOptionParameter raw_create_options[] = {
744 .name = BLOCK_OPT_SIZE,
746 .help = "Virtual disk size"
751 static BlockDriver bdrv_raw = {
752 .format_name = "raw",
753 .instance_size = sizeof(BDRVRawState),
754 .bdrv_probe = NULL, /* no probe for protocols */
755 .bdrv_open = raw_open,
756 .bdrv_read = raw_read,
757 .bdrv_write = raw_write,
758 .bdrv_close = raw_close,
759 .bdrv_create = raw_create,
760 .bdrv_flush = raw_flush,
762 .bdrv_aio_readv = raw_aio_readv,
763 .bdrv_aio_writev = raw_aio_writev,
764 .bdrv_aio_flush = raw_aio_flush,
766 .bdrv_truncate = raw_truncate,
767 .bdrv_getlength = raw_getlength,
769 .create_options = raw_create_options,
772 /***********************************************/
776 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
777 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
779 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
781 kern_return_t kernResult;
782 mach_port_t masterPort;
783 CFMutableDictionaryRef classesToMatch;
785 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
786 if ( KERN_SUCCESS != kernResult ) {
787 printf( "IOMasterPort returned %d\n", kernResult );
790 classesToMatch = IOServiceMatching( kIOCDMediaClass );
791 if ( classesToMatch == NULL ) {
792 printf( "IOServiceMatching returned a NULL dictionary.\n" );
794 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
796 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
797 if ( KERN_SUCCESS != kernResult )
799 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
805 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
807 io_object_t nextMedia;
808 kern_return_t kernResult = KERN_FAILURE;
810 nextMedia = IOIteratorNext( mediaIterator );
813 CFTypeRef bsdPathAsCFString;
814 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
815 if ( bsdPathAsCFString ) {
816 size_t devPathLength;
817 strcpy( bsdPath, _PATH_DEV );
818 strcat( bsdPath, "r" );
819 devPathLength = strlen( bsdPath );
820 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
821 kernResult = KERN_SUCCESS;
823 CFRelease( bsdPathAsCFString );
825 IOObjectRelease( nextMedia );
833 static int hdev_probe_device(const char *filename)
837 /* allow a dedicated CD-ROM driver to match with a higher priority */
838 if (strstart(filename, "/dev/cdrom", NULL))
841 if (stat(filename, &st) >= 0 &&
842 (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
849 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
851 BDRVRawState *s = bs->opaque;
854 if (strstart(filename, "/dev/cdrom", NULL)) {
855 kern_return_t kernResult;
856 io_iterator_t mediaIterator;
857 char bsdPath[ MAXPATHLEN ];
860 kernResult = FindEjectableCDMedia( &mediaIterator );
861 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
863 if ( bsdPath[ 0 ] != '\0' ) {
864 strcat(bsdPath,"s0");
865 /* some CDs don't have a partition 0 */
866 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
868 bsdPath[strlen(bsdPath)-1] = '1';
876 IOObjectRelease( mediaIterator );
880 s->type = FTYPE_FILE;
881 #if defined(__linux__)
882 if (strstart(filename, "/dev/sg", NULL)) {
887 return raw_open_common(bs, filename, flags, 0);
890 #if defined(__linux__)
891 /* Note: we do not have a reliable method to detect if the floppy is
892 present. The current method is to try to open the floppy at every
893 I/O and to keep it opened during a few hundreds of ms. */
894 static int fd_open(BlockDriverState *bs)
896 BDRVRawState *s = bs->opaque;
897 int last_media_present;
899 if (s->type != FTYPE_FD)
901 last_media_present = (s->fd >= 0);
903 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
907 printf("Floppy closed\n");
911 if (s->fd_got_error &&
912 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
914 printf("No floppy (open delayed)\n");
918 s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK);
920 s->fd_error_time = qemu_get_clock(rt_clock);
922 if (last_media_present)
923 s->fd_media_changed = 1;
925 printf("No floppy\n");
930 printf("Floppy opened\n");
933 if (!last_media_present)
934 s->fd_media_changed = 1;
935 s->fd_open_time = qemu_get_clock(rt_clock);
940 static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
942 BDRVRawState *s = bs->opaque;
944 return ioctl(s->fd, req, buf);
947 static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
948 unsigned long int req, void *buf,
949 BlockDriverCompletionFunc *cb, void *opaque)
951 BDRVRawState *s = bs->opaque;
955 return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
958 #elif defined(__FreeBSD__)
959 static int fd_open(BlockDriverState *bs)
961 BDRVRawState *s = bs->opaque;
963 /* this is just to ensure s->fd is sane (its called by io ops) */
968 #else /* !linux && !FreeBSD */
970 static int fd_open(BlockDriverState *bs)
975 #endif /* !linux && !FreeBSD */
977 static int hdev_create(const char *filename, QEMUOptionParameter *options)
981 struct stat stat_buf;
982 int64_t total_size = 0;
984 /* Read out options */
985 while (options && options->name) {
986 if (!strcmp(options->name, "size")) {
987 total_size = options->value.n / 512;
992 fd = open(filename, O_WRONLY | O_BINARY);
996 if (fstat(fd, &stat_buf) < 0)
998 else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
1000 else if (lseek(fd, 0, SEEK_END) < total_size * 512)
1007 static BlockDriver bdrv_host_device = {
1008 .format_name = "host_device",
1009 .instance_size = sizeof(BDRVRawState),
1010 .bdrv_probe_device = hdev_probe_device,
1011 .bdrv_open = hdev_open,
1012 .bdrv_close = raw_close,
1013 .bdrv_create = hdev_create,
1014 .bdrv_flush = raw_flush,
1016 .bdrv_aio_readv = raw_aio_readv,
1017 .bdrv_aio_writev = raw_aio_writev,
1018 .bdrv_aio_flush = raw_aio_flush,
1020 .bdrv_read = raw_read,
1021 .bdrv_write = raw_write,
1022 .bdrv_getlength = raw_getlength,
1024 /* generic scsi device */
1026 .bdrv_ioctl = hdev_ioctl,
1027 .bdrv_aio_ioctl = hdev_aio_ioctl,
1032 static int floppy_open(BlockDriverState *bs, const char *filename, int flags)
1034 BDRVRawState *s = bs->opaque;
1039 /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
1040 ret = raw_open_common(bs, filename, flags, O_NONBLOCK);
1044 /* close fd so that we can reopen it as needed */
1047 s->fd_media_changed = 1;
1052 static int floppy_probe_device(const char *filename)
1054 if (strstart(filename, "/dev/fd", NULL))
1060 static int floppy_is_inserted(BlockDriverState *bs)
1062 return fd_open(bs) >= 0;
1065 static int floppy_media_changed(BlockDriverState *bs)
1067 BDRVRawState *s = bs->opaque;
1071 * XXX: we do not have a true media changed indication.
1072 * It does not work if the floppy is changed without trying to read it.
1075 ret = s->fd_media_changed;
1076 s->fd_media_changed = 0;
1078 printf("Floppy changed=%d\n", ret);
1083 static int floppy_eject(BlockDriverState *bs, int eject_flag)
1085 BDRVRawState *s = bs->opaque;
1092 fd = open(bs->filename, s->open_flags | O_NONBLOCK);
1094 if (ioctl(fd, FDEJECT, 0) < 0)
1102 static BlockDriver bdrv_host_floppy = {
1103 .format_name = "host_floppy",
1104 .instance_size = sizeof(BDRVRawState),
1105 .bdrv_probe_device = floppy_probe_device,
1106 .bdrv_open = floppy_open,
1107 .bdrv_close = raw_close,
1108 .bdrv_create = hdev_create,
1109 .bdrv_flush = raw_flush,
1111 .bdrv_aio_readv = raw_aio_readv,
1112 .bdrv_aio_writev = raw_aio_writev,
1113 .bdrv_aio_flush = raw_aio_flush,
1115 .bdrv_read = raw_read,
1116 .bdrv_write = raw_write,
1117 .bdrv_getlength = raw_getlength,
1119 /* removable device support */
1120 .bdrv_is_inserted = floppy_is_inserted,
1121 .bdrv_media_changed = floppy_media_changed,
1122 .bdrv_eject = floppy_eject,
1125 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1127 BDRVRawState *s = bs->opaque;
1131 /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
1132 return raw_open_common(bs, filename, flags, O_NONBLOCK);
1135 static int cdrom_probe_device(const char *filename)
1137 if (strstart(filename, "/dev/cd", NULL))
1142 static int cdrom_is_inserted(BlockDriverState *bs)
1144 BDRVRawState *s = bs->opaque;
1147 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1148 if (ret == CDS_DISC_OK)
1153 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1155 BDRVRawState *s = bs->opaque;
1158 if (ioctl(s->fd, CDROMEJECT, NULL) < 0)
1159 perror("CDROMEJECT");
1161 if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0)
1162 perror("CDROMEJECT");
1168 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1170 BDRVRawState *s = bs->opaque;
1172 if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) {
1174 * Note: an error can happen if the distribution automatically
1177 /* perror("CDROM_LOCKDOOR"); */
1183 static BlockDriver bdrv_host_cdrom = {
1184 .format_name = "host_cdrom",
1185 .instance_size = sizeof(BDRVRawState),
1186 .bdrv_probe_device = cdrom_probe_device,
1187 .bdrv_open = cdrom_open,
1188 .bdrv_close = raw_close,
1189 .bdrv_create = hdev_create,
1190 .bdrv_flush = raw_flush,
1192 .bdrv_aio_readv = raw_aio_readv,
1193 .bdrv_aio_writev = raw_aio_writev,
1194 .bdrv_aio_flush = raw_aio_flush,
1196 .bdrv_read = raw_read,
1197 .bdrv_write = raw_write,
1198 .bdrv_getlength = raw_getlength,
1200 /* removable device support */
1201 .bdrv_is_inserted = cdrom_is_inserted,
1202 .bdrv_eject = cdrom_eject,
1203 .bdrv_set_locked = cdrom_set_locked,
1205 /* generic scsi device */
1206 .bdrv_ioctl = hdev_ioctl,
1207 .bdrv_aio_ioctl = hdev_aio_ioctl,
1209 #endif /* __linux__ */
1212 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1214 BDRVRawState *s = bs->opaque;
1219 ret = raw_open_common(bs, filename, flags, 0);
1223 /* make sure the door isnt locked at this time */
1224 ioctl(s->fd, CDIOCALLOW);
1228 static int cdrom_probe_device(const char *filename)
1230 if (strstart(filename, "/dev/cd", NULL) ||
1231 strstart(filename, "/dev/acd", NULL))
1236 static int cdrom_reopen(BlockDriverState *bs)
1238 BDRVRawState *s = bs->opaque;
1242 * Force reread of possibly changed/newly loaded disc,
1243 * FreeBSD seems to not notice sometimes...
1247 fd = open(bs->filename, s->open_flags, 0644);
1254 /* make sure the door isnt locked at this time */
1255 ioctl(s->fd, CDIOCALLOW);
1259 static int cdrom_is_inserted(BlockDriverState *bs)
1261 return raw_getlength(bs) > 0;
1264 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1266 BDRVRawState *s = bs->opaque;
1271 (void) ioctl(s->fd, CDIOCALLOW);
1274 if (ioctl(s->fd, CDIOCEJECT) < 0)
1275 perror("CDIOCEJECT");
1277 if (ioctl(s->fd, CDIOCCLOSE) < 0)
1278 perror("CDIOCCLOSE");
1281 if (cdrom_reopen(bs) < 0)
1286 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1288 BDRVRawState *s = bs->opaque;
1292 if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1294 * Note: an error can happen if the distribution automatically
1297 /* perror("CDROM_LOCKDOOR"); */
1303 static BlockDriver bdrv_host_cdrom = {
1304 .format_name = "host_cdrom",
1305 .instance_size = sizeof(BDRVRawState),
1306 .bdrv_probe_device = cdrom_probe_device,
1307 .bdrv_open = cdrom_open,
1308 .bdrv_close = raw_close,
1309 .bdrv_create = hdev_create,
1310 .bdrv_flush = raw_flush,
1312 .bdrv_aio_readv = raw_aio_readv,
1313 .bdrv_aio_writev = raw_aio_writev,
1314 .bdrv_aio_flush = raw_aio_flush,
1316 .bdrv_read = raw_read,
1317 .bdrv_write = raw_write,
1318 .bdrv_getlength = raw_getlength,
1320 /* removable device support */
1321 .bdrv_is_inserted = cdrom_is_inserted,
1322 .bdrv_eject = cdrom_eject,
1323 .bdrv_set_locked = cdrom_set_locked,
1325 #endif /* __FreeBSD__ */
1327 static void bdrv_raw_init(void)
1330 * Register all the drivers. Note that order is important, the driver
1331 * registered last will get probed first.
1333 bdrv_register(&bdrv_raw);
1334 bdrv_register(&bdrv_host_device);
1336 bdrv_register(&bdrv_host_floppy);
1337 bdrv_register(&bdrv_host_cdrom);
1340 bdrv_register(&bdrv_host_cdrom);
1344 block_init(bdrv_raw_init);