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 {
108 unsigned int lseek_err_cnt;
110 #if defined(__linux__)
111 /* linux floppy specific */
112 int64_t fd_open_time;
113 int64_t fd_error_time;
115 int fd_media_changed;
117 #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__) || defined(__FreeBSD_kernel__)
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_RDWR) {
142 s->open_flags |= O_RDWR;
144 s->open_flags |= O_RDONLY;
147 /* Use O_DSYNC for write-through caching, no flags for write-back caching,
148 * and O_DIRECT for no caching. */
149 if ((bdrv_flags & BDRV_O_NOCACHE))
150 s->open_flags |= O_DIRECT;
151 else if (!(bdrv_flags & BDRV_O_CACHE_WB))
152 s->open_flags |= O_DSYNC;
155 fd = qemu_open(filename, s->open_flags, 0644);
163 s->aligned_buf = NULL;
165 if ((bdrv_flags & BDRV_O_NOCACHE)) {
166 s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
167 if (s->aligned_buf == NULL) {
172 #ifdef CONFIG_LINUX_AIO
173 if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
174 (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
176 /* We're falling back to POSIX AIO in some cases */
179 s->aio_ctx = laio_init();
187 if (paio_init() < 0) {
190 #ifdef CONFIG_LINUX_AIO
198 qemu_vfree(s->aligned_buf);
204 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
206 BDRVRawState *s = bs->opaque;
208 s->type = FTYPE_FILE;
209 return raw_open_common(bs, filename, flags, 0);
212 /* XXX: use host sector size if necessary with:
213 #ifdef DIOCGSECTORSIZE
215 unsigned int sectorsize = 512;
216 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
217 sectorsize > bufsize)
218 bufsize = sectorsize;
222 u_int32_t blockSize = 512;
223 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
230 * offset and count are in bytes, but must be multiples of 512 for files
231 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
233 * This function may be called without alignment if the caller ensures
234 * that O_DIRECT is not in effect.
236 static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
237 uint8_t *buf, int count)
239 BDRVRawState *s = bs->opaque;
246 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
247 ++(s->lseek_err_cnt);
248 if(s->lseek_err_cnt <= 10) {
249 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
250 "] lseek failed : %d = %s\n",
251 s->fd, bs->filename, offset, buf, count,
252 bs->total_sectors, errno, strerror(errno));
258 ret = read(s->fd, buf, count);
260 goto label__raw_read__success;
262 /* Allow reads beyond the end (needed for pwrite) */
263 if ((ret == 0) && bs->growable) {
264 int64_t size = raw_getlength(bs);
265 if (offset >= size) {
266 memset(buf, 0, count);
268 goto label__raw_read__success;
272 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
273 "] read failed %d : %d = %s\n",
274 s->fd, bs->filename, offset, buf, count,
275 bs->total_sectors, ret, errno, strerror(errno));
277 /* Try harder for CDrom. */
278 if (bs->type == BDRV_TYPE_CDROM) {
279 lseek(s->fd, offset, SEEK_SET);
280 ret = read(s->fd, buf, count);
282 goto label__raw_read__success;
283 lseek(s->fd, offset, SEEK_SET);
284 ret = read(s->fd, buf, count);
286 goto label__raw_read__success;
288 DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
289 "] retry read failed %d : %d = %s\n",
290 s->fd, bs->filename, offset, buf, count,
291 bs->total_sectors, ret, errno, strerror(errno));
294 label__raw_read__success:
296 return (ret < 0) ? -errno : ret;
300 * offset and count are in bytes, but must be multiples of 512 for files
301 * opened with O_DIRECT. buf must be aligned to 512 bytes then.
303 * This function may be called without alignment if the caller ensures
304 * that O_DIRECT is not in effect.
306 static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
307 const uint8_t *buf, int count)
309 BDRVRawState *s = bs->opaque;
316 if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
317 ++(s->lseek_err_cnt);
318 if(s->lseek_err_cnt) {
319 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
320 PRId64 "] lseek failed : %d = %s\n",
321 s->fd, bs->filename, offset, buf, count,
322 bs->total_sectors, errno, strerror(errno));
326 s->lseek_err_cnt = 0;
328 ret = write(s->fd, buf, count);
330 goto label__raw_write__success;
332 DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
333 "] write failed %d : %d = %s\n",
334 s->fd, bs->filename, offset, buf, count,
335 bs->total_sectors, ret, errno, strerror(errno));
337 label__raw_write__success:
339 return (ret < 0) ? -errno : ret;
344 * offset and count are in bytes and possibly not aligned. For files opened
345 * with O_DIRECT, necessary alignments are ensured before calling
346 * raw_pread_aligned to do the actual read.
348 static int raw_pread(BlockDriverState *bs, int64_t offset,
349 uint8_t *buf, int count)
351 BDRVRawState *s = bs->opaque;
352 int size, ret, shift, sum;
356 if (s->aligned_buf != NULL) {
358 if (offset & 0x1ff) {
359 /* align offset on a 512 bytes boundary */
361 shift = offset & 0x1ff;
362 size = (shift + count + 0x1ff) & ~0x1ff;
363 if (size > ALIGNED_BUFFER_SIZE)
364 size = ALIGNED_BUFFER_SIZE;
365 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size);
372 memcpy(buf, s->aligned_buf + shift, size);
382 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
384 /* read on aligned buffer */
388 size = (count + 0x1ff) & ~0x1ff;
389 if (size > ALIGNED_BUFFER_SIZE)
390 size = ALIGNED_BUFFER_SIZE;
392 ret = raw_pread_aligned(bs, offset, s->aligned_buf, size);
395 } else if (ret == 0) {
396 fprintf(stderr, "raw_pread: read beyond end of file\n");
404 memcpy(buf, s->aligned_buf, size);
416 return raw_pread_aligned(bs, offset, buf, count) + sum;
419 static int raw_read(BlockDriverState *bs, int64_t sector_num,
420 uint8_t *buf, int nb_sectors)
424 ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512);
425 if (ret == (nb_sectors * 512))
431 * offset and count are in bytes and possibly not aligned. For files opened
432 * with O_DIRECT, necessary alignments are ensured before calling
433 * raw_pwrite_aligned to do the actual write.
435 static int raw_pwrite(BlockDriverState *bs, int64_t offset,
436 const uint8_t *buf, int count)
438 BDRVRawState *s = bs->opaque;
439 int size, ret, shift, sum;
443 if (s->aligned_buf != NULL) {
445 if (offset & 0x1ff) {
446 /* align offset on a 512 bytes boundary */
447 shift = offset & 0x1ff;
448 ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
455 memcpy(s->aligned_buf + shift, buf, size);
457 ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
469 if (count & 0x1ff || (uintptr_t) buf & 0x1ff) {
471 while ((size = (count & ~0x1ff)) != 0) {
473 if (size > ALIGNED_BUFFER_SIZE)
474 size = ALIGNED_BUFFER_SIZE;
476 memcpy(s->aligned_buf, buf, size);
478 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size);
487 /* here, count < 512 because (count & ~0x1ff) == 0 */
489 ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
492 memcpy(s->aligned_buf, buf, count);
494 ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
505 return raw_pwrite_aligned(bs, offset, buf, count) + sum;
508 static int raw_write(BlockDriverState *bs, int64_t sector_num,
509 const uint8_t *buf, int nb_sectors)
512 ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512);
513 if (ret == (nb_sectors * 512))
519 * Check if all memory in this vector is sector aligned.
521 static int qiov_is_aligned(QEMUIOVector *qiov)
525 for (i = 0; i < qiov->niov; i++) {
526 if ((uintptr_t) qiov->iov[i].iov_base % 512) {
534 static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
535 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
536 BlockDriverCompletionFunc *cb, void *opaque, int type)
538 BDRVRawState *s = bs->opaque;
544 * If O_DIRECT is used the buffer needs to be aligned on a sector
545 * boundary. Check if this is the case or telll the low-level
546 * driver that it needs to copy the buffer.
548 if (s->aligned_buf) {
549 if (!qiov_is_aligned(qiov)) {
550 type |= QEMU_AIO_MISALIGNED;
551 #ifdef CONFIG_LINUX_AIO
552 } else if (s->use_aio) {
553 return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
554 nb_sectors, cb, opaque, type);
559 return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
563 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
564 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
565 BlockDriverCompletionFunc *cb, void *opaque)
567 return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
568 cb, opaque, QEMU_AIO_READ);
571 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
572 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
573 BlockDriverCompletionFunc *cb, void *opaque)
575 return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
576 cb, opaque, QEMU_AIO_WRITE);
579 static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
580 BlockDriverCompletionFunc *cb, void *opaque)
582 BDRVRawState *s = bs->opaque;
587 return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
590 static void raw_close(BlockDriverState *bs)
592 BDRVRawState *s = bs->opaque;
596 if (s->aligned_buf != NULL)
597 qemu_vfree(s->aligned_buf);
601 static int raw_truncate(BlockDriverState *bs, int64_t offset)
603 BDRVRawState *s = bs->opaque;
604 if (s->type != FTYPE_FILE)
606 if (ftruncate(s->fd, offset) < 0)
612 static int64_t raw_getlength(BlockDriverState *bs)
614 BDRVRawState *s = bs->opaque;
620 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
623 if (ioctl(fd, DIOCGDINFO, &dl))
625 return (uint64_t)dl.d_secsize *
626 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
630 #elif defined(__sun__)
631 static int64_t raw_getlength(BlockDriverState *bs)
633 BDRVRawState *s = bs->opaque;
634 struct dk_minfo minfo;
643 * Use the DKIOCGMEDIAINFO ioctl to read the size.
645 ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo);
647 return minfo.dki_lbsize * minfo.dki_capacity;
651 * There are reports that lseek on some devices fails, but
652 * irc discussion said that contingency on contingency was overkill.
654 return lseek(s->fd, 0, SEEK_END);
656 #elif defined(CONFIG_BSD)
657 static int64_t raw_getlength(BlockDriverState *bs)
659 BDRVRawState *s = bs->opaque;
663 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
672 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
675 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
676 #ifdef DIOCGMEDIASIZE
677 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
678 #elif defined(DIOCGPART)
681 if (ioctl(fd, DIOCGPART, &pi) == 0)
682 size = pi.media_size;
689 size = LONG_LONG_MAX;
691 size = lseek(fd, 0LL, SEEK_END);
693 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
696 /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
697 if (size == 2048LL * (unsigned)-1)
699 /* XXX no disc? maybe we need to reopen... */
700 if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
707 size = lseek(fd, 0, SEEK_END);
712 static int64_t raw_getlength(BlockDriverState *bs)
714 BDRVRawState *s = bs->opaque;
722 return lseek(s->fd, 0, SEEK_END);
726 static int raw_create(const char *filename, QEMUOptionParameter *options)
730 int64_t total_size = 0;
732 /* Read out options */
733 while (options && options->name) {
734 if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
735 total_size = options->value.n / 512;
740 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
745 if (ftruncate(fd, total_size * 512) != 0) {
748 if (close(fd) != 0) {
755 static void raw_flush(BlockDriverState *bs)
757 BDRVRawState *s = bs->opaque;
758 qemu_fdatasync(s->fd);
762 static QEMUOptionParameter raw_create_options[] = {
764 .name = BLOCK_OPT_SIZE,
766 .help = "Virtual disk size"
771 static BlockDriver bdrv_file = {
772 .format_name = "file",
773 .protocol_name = "file",
774 .instance_size = sizeof(BDRVRawState),
775 .bdrv_probe = NULL, /* no probe for protocols */
776 .bdrv_file_open = raw_open,
777 .bdrv_read = raw_read,
778 .bdrv_write = raw_write,
779 .bdrv_close = raw_close,
780 .bdrv_create = raw_create,
781 .bdrv_flush = raw_flush,
783 .bdrv_aio_readv = raw_aio_readv,
784 .bdrv_aio_writev = raw_aio_writev,
785 .bdrv_aio_flush = raw_aio_flush,
787 .bdrv_truncate = raw_truncate,
788 .bdrv_getlength = raw_getlength,
790 .create_options = raw_create_options,
793 /***********************************************/
797 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
798 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
800 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
802 kern_return_t kernResult;
803 mach_port_t masterPort;
804 CFMutableDictionaryRef classesToMatch;
806 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
807 if ( KERN_SUCCESS != kernResult ) {
808 printf( "IOMasterPort returned %d\n", kernResult );
811 classesToMatch = IOServiceMatching( kIOCDMediaClass );
812 if ( classesToMatch == NULL ) {
813 printf( "IOServiceMatching returned a NULL dictionary.\n" );
815 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
817 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
818 if ( KERN_SUCCESS != kernResult )
820 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
826 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
828 io_object_t nextMedia;
829 kern_return_t kernResult = KERN_FAILURE;
831 nextMedia = IOIteratorNext( mediaIterator );
834 CFTypeRef bsdPathAsCFString;
835 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
836 if ( bsdPathAsCFString ) {
837 size_t devPathLength;
838 strcpy( bsdPath, _PATH_DEV );
839 strcat( bsdPath, "r" );
840 devPathLength = strlen( bsdPath );
841 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
842 kernResult = KERN_SUCCESS;
844 CFRelease( bsdPathAsCFString );
846 IOObjectRelease( nextMedia );
854 static int hdev_probe_device(const char *filename)
858 /* allow a dedicated CD-ROM driver to match with a higher priority */
859 if (strstart(filename, "/dev/cdrom", NULL))
862 if (stat(filename, &st) >= 0 &&
863 (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
870 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
872 BDRVRawState *s = bs->opaque;
875 if (strstart(filename, "/dev/cdrom", NULL)) {
876 kern_return_t kernResult;
877 io_iterator_t mediaIterator;
878 char bsdPath[ MAXPATHLEN ];
881 kernResult = FindEjectableCDMedia( &mediaIterator );
882 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
884 if ( bsdPath[ 0 ] != '\0' ) {
885 strcat(bsdPath,"s0");
886 /* some CDs don't have a partition 0 */
887 fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
889 bsdPath[strlen(bsdPath)-1] = '1';
897 IOObjectRelease( mediaIterator );
901 s->type = FTYPE_FILE;
902 #if defined(__linux__)
903 if (strstart(filename, "/dev/sg", NULL)) {
908 return raw_open_common(bs, filename, flags, 0);
911 #if defined(__linux__)
912 /* Note: we do not have a reliable method to detect if the floppy is
913 present. The current method is to try to open the floppy at every
914 I/O and to keep it opened during a few hundreds of ms. */
915 static int fd_open(BlockDriverState *bs)
917 BDRVRawState *s = bs->opaque;
918 int last_media_present;
920 if (s->type != FTYPE_FD)
922 last_media_present = (s->fd >= 0);
924 (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
928 printf("Floppy closed\n");
932 if (s->fd_got_error &&
933 (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
935 printf("No floppy (open delayed)\n");
939 s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK);
941 s->fd_error_time = qemu_get_clock(rt_clock);
943 if (last_media_present)
944 s->fd_media_changed = 1;
946 printf("No floppy\n");
951 printf("Floppy opened\n");
954 if (!last_media_present)
955 s->fd_media_changed = 1;
956 s->fd_open_time = qemu_get_clock(rt_clock);
961 static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
963 BDRVRawState *s = bs->opaque;
965 return ioctl(s->fd, req, buf);
968 static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
969 unsigned long int req, void *buf,
970 BlockDriverCompletionFunc *cb, void *opaque)
972 BDRVRawState *s = bs->opaque;
976 return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
979 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
980 static int fd_open(BlockDriverState *bs)
982 BDRVRawState *s = bs->opaque;
984 /* this is just to ensure s->fd is sane (its called by io ops) */
989 #else /* !linux && !FreeBSD */
991 static int fd_open(BlockDriverState *bs)
996 #endif /* !linux && !FreeBSD */
998 static int hdev_create(const char *filename, QEMUOptionParameter *options)
1002 struct stat stat_buf;
1003 int64_t total_size = 0;
1005 /* Read out options */
1006 while (options && options->name) {
1007 if (!strcmp(options->name, "size")) {
1008 total_size = options->value.n / 512;
1013 fd = open(filename, O_WRONLY | O_BINARY);
1017 if (fstat(fd, &stat_buf) < 0)
1019 else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
1021 else if (lseek(fd, 0, SEEK_END) < total_size * 512)
1028 static BlockDriver bdrv_host_device = {
1029 .format_name = "host_device",
1030 .protocol_name = "host_device",
1031 .instance_size = sizeof(BDRVRawState),
1032 .bdrv_probe_device = hdev_probe_device,
1033 .bdrv_file_open = hdev_open,
1034 .bdrv_close = raw_close,
1035 .bdrv_create = hdev_create,
1036 .create_options = raw_create_options,
1038 .bdrv_flush = raw_flush,
1040 .bdrv_aio_readv = raw_aio_readv,
1041 .bdrv_aio_writev = raw_aio_writev,
1042 .bdrv_aio_flush = raw_aio_flush,
1044 .bdrv_read = raw_read,
1045 .bdrv_write = raw_write,
1046 .bdrv_getlength = raw_getlength,
1048 /* generic scsi device */
1050 .bdrv_ioctl = hdev_ioctl,
1051 .bdrv_aio_ioctl = hdev_aio_ioctl,
1056 static int floppy_open(BlockDriverState *bs, const char *filename, int flags)
1058 BDRVRawState *s = bs->opaque;
1063 /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
1064 ret = raw_open_common(bs, filename, flags, O_NONBLOCK);
1068 /* close fd so that we can reopen it as needed */
1071 s->fd_media_changed = 1;
1076 static int floppy_probe_device(const char *filename)
1080 struct floppy_struct fdparam;
1082 if (strstart(filename, "/dev/fd", NULL))
1085 fd = open(filename, O_RDONLY | O_NONBLOCK);
1090 /* Attempt to detect via a floppy specific ioctl */
1091 ret = ioctl(fd, FDGETPRM, &fdparam);
1101 static int floppy_is_inserted(BlockDriverState *bs)
1103 return fd_open(bs) >= 0;
1106 static int floppy_media_changed(BlockDriverState *bs)
1108 BDRVRawState *s = bs->opaque;
1112 * XXX: we do not have a true media changed indication.
1113 * It does not work if the floppy is changed without trying to read it.
1116 ret = s->fd_media_changed;
1117 s->fd_media_changed = 0;
1119 printf("Floppy changed=%d\n", ret);
1124 static int floppy_eject(BlockDriverState *bs, int eject_flag)
1126 BDRVRawState *s = bs->opaque;
1133 fd = open(bs->filename, s->open_flags | O_NONBLOCK);
1135 if (ioctl(fd, FDEJECT, 0) < 0)
1143 static BlockDriver bdrv_host_floppy = {
1144 .format_name = "host_floppy",
1145 .protocol_name = "host_floppy",
1146 .instance_size = sizeof(BDRVRawState),
1147 .bdrv_probe_device = floppy_probe_device,
1148 .bdrv_file_open = floppy_open,
1149 .bdrv_close = raw_close,
1150 .bdrv_create = hdev_create,
1151 .create_options = raw_create_options,
1153 .bdrv_flush = raw_flush,
1155 .bdrv_aio_readv = raw_aio_readv,
1156 .bdrv_aio_writev = raw_aio_writev,
1157 .bdrv_aio_flush = raw_aio_flush,
1159 .bdrv_read = raw_read,
1160 .bdrv_write = raw_write,
1161 .bdrv_getlength = raw_getlength,
1163 /* removable device support */
1164 .bdrv_is_inserted = floppy_is_inserted,
1165 .bdrv_media_changed = floppy_media_changed,
1166 .bdrv_eject = floppy_eject,
1169 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1171 BDRVRawState *s = bs->opaque;
1175 /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
1176 return raw_open_common(bs, filename, flags, O_NONBLOCK);
1179 static int cdrom_probe_device(const char *filename)
1184 if (strstart(filename, "/dev/cd", NULL))
1187 fd = open(filename, O_RDONLY | O_NONBLOCK);
1192 /* Attempt to detect via a CDROM specific ioctl */
1193 ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1202 static int cdrom_is_inserted(BlockDriverState *bs)
1204 BDRVRawState *s = bs->opaque;
1207 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1208 if (ret == CDS_DISC_OK)
1213 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1215 BDRVRawState *s = bs->opaque;
1218 if (ioctl(s->fd, CDROMEJECT, NULL) < 0)
1219 perror("CDROMEJECT");
1221 if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0)
1222 perror("CDROMEJECT");
1228 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1230 BDRVRawState *s = bs->opaque;
1232 if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) {
1234 * Note: an error can happen if the distribution automatically
1237 /* perror("CDROM_LOCKDOOR"); */
1243 static BlockDriver bdrv_host_cdrom = {
1244 .format_name = "host_cdrom",
1245 .protocol_name = "host_cdrom",
1246 .instance_size = sizeof(BDRVRawState),
1247 .bdrv_probe_device = cdrom_probe_device,
1248 .bdrv_file_open = cdrom_open,
1249 .bdrv_close = raw_close,
1250 .bdrv_create = hdev_create,
1251 .create_options = raw_create_options,
1253 .bdrv_flush = raw_flush,
1255 .bdrv_aio_readv = raw_aio_readv,
1256 .bdrv_aio_writev = raw_aio_writev,
1257 .bdrv_aio_flush = raw_aio_flush,
1259 .bdrv_read = raw_read,
1260 .bdrv_write = raw_write,
1261 .bdrv_getlength = raw_getlength,
1263 /* removable device support */
1264 .bdrv_is_inserted = cdrom_is_inserted,
1265 .bdrv_eject = cdrom_eject,
1266 .bdrv_set_locked = cdrom_set_locked,
1268 /* generic scsi device */
1269 .bdrv_ioctl = hdev_ioctl,
1270 .bdrv_aio_ioctl = hdev_aio_ioctl,
1272 #endif /* __linux__ */
1274 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
1275 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1277 BDRVRawState *s = bs->opaque;
1282 ret = raw_open_common(bs, filename, flags, 0);
1286 /* make sure the door isnt locked at this time */
1287 ioctl(s->fd, CDIOCALLOW);
1291 static int cdrom_probe_device(const char *filename)
1293 if (strstart(filename, "/dev/cd", NULL) ||
1294 strstart(filename, "/dev/acd", NULL))
1299 static int cdrom_reopen(BlockDriverState *bs)
1301 BDRVRawState *s = bs->opaque;
1305 * Force reread of possibly changed/newly loaded disc,
1306 * FreeBSD seems to not notice sometimes...
1310 fd = open(bs->filename, s->open_flags, 0644);
1317 /* make sure the door isnt locked at this time */
1318 ioctl(s->fd, CDIOCALLOW);
1322 static int cdrom_is_inserted(BlockDriverState *bs)
1324 return raw_getlength(bs) > 0;
1327 static int cdrom_eject(BlockDriverState *bs, int eject_flag)
1329 BDRVRawState *s = bs->opaque;
1334 (void) ioctl(s->fd, CDIOCALLOW);
1337 if (ioctl(s->fd, CDIOCEJECT) < 0)
1338 perror("CDIOCEJECT");
1340 if (ioctl(s->fd, CDIOCCLOSE) < 0)
1341 perror("CDIOCCLOSE");
1344 if (cdrom_reopen(bs) < 0)
1349 static int cdrom_set_locked(BlockDriverState *bs, int locked)
1351 BDRVRawState *s = bs->opaque;
1355 if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1357 * Note: an error can happen if the distribution automatically
1360 /* perror("CDROM_LOCKDOOR"); */
1366 static BlockDriver bdrv_host_cdrom = {
1367 .format_name = "host_cdrom",
1368 .protocol_name = "host_cdrom",
1369 .instance_size = sizeof(BDRVRawState),
1370 .bdrv_probe_device = cdrom_probe_device,
1371 .bdrv_file_open = cdrom_open,
1372 .bdrv_close = raw_close,
1373 .bdrv_create = hdev_create,
1374 .create_options = raw_create_options,
1376 .bdrv_flush = raw_flush,
1378 .bdrv_aio_readv = raw_aio_readv,
1379 .bdrv_aio_writev = raw_aio_writev,
1380 .bdrv_aio_flush = raw_aio_flush,
1382 .bdrv_read = raw_read,
1383 .bdrv_write = raw_write,
1384 .bdrv_getlength = raw_getlength,
1386 /* removable device support */
1387 .bdrv_is_inserted = cdrom_is_inserted,
1388 .bdrv_eject = cdrom_eject,
1389 .bdrv_set_locked = cdrom_set_locked,
1391 #endif /* __FreeBSD__ */
1393 static void bdrv_file_init(void)
1396 * Register all the drivers. Note that order is important, the driver
1397 * registered last will get probed first.
1399 bdrv_register(&bdrv_file);
1400 bdrv_register(&bdrv_host_device);
1402 bdrv_register(&bdrv_host_floppy);
1403 bdrv_register(&bdrv_host_cdrom);
1405 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
1406 bdrv_register(&bdrv_host_cdrom);
1410 block_init(bdrv_file_init);