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
141 typedef struct BDRVRawReopenState {
144 #ifdef CONFIG_LINUX_AIO
147 } BDRVRawReopenState;
149 static int fd_open(BlockDriverState *bs);
150 static int64_t raw_getlength(BlockDriverState *bs);
152 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
153 static int cdrom_reopen(BlockDriverState *bs);
156 #if defined(__NetBSD__)
157 static int raw_normalize_devicepath(const char **filename)
159 static char namebuf[PATH_MAX];
160 const char *dp, *fname;
164 dp = strrchr(fname, '/');
165 if (lstat(fname, &sb) < 0) {
166 fprintf(stderr, "%s: stat failed: %s\n",
167 fname, strerror(errno));
171 if (!S_ISBLK(sb.st_mode)) {
176 snprintf(namebuf, PATH_MAX, "r%s", fname);
178 snprintf(namebuf, PATH_MAX, "%.*s/r%s",
179 (int)(dp - fname), fname, dp + 1);
181 fprintf(stderr, "%s is a block device", fname);
183 fprintf(stderr, ", using %s\n", *filename);
188 static int raw_normalize_devicepath(const char **filename)
194 static void raw_parse_flags(int bdrv_flags, int *open_flags)
196 assert(open_flags != NULL);
198 *open_flags |= O_BINARY;
199 *open_flags &= ~O_ACCMODE;
200 if (bdrv_flags & BDRV_O_RDWR) {
201 *open_flags |= O_RDWR;
203 *open_flags |= O_RDONLY;
206 /* Use O_DSYNC for write-through caching, no flags for write-back caching,
207 * and O_DIRECT for no caching. */
208 if ((bdrv_flags & BDRV_O_NOCACHE)) {
209 *open_flags |= O_DIRECT;
213 #ifdef CONFIG_LINUX_AIO
214 static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags)
217 assert(aio_ctx != NULL);
218 assert(use_aio != NULL);
220 * Currently Linux do AIO only for files opened with O_DIRECT
221 * specified so check NOCACHE flag too
223 if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
224 (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
226 /* if non-NULL, laio_init() has already been run */
227 if (*aio_ctx == NULL) {
228 *aio_ctx = laio_init();
245 static int raw_open_common(BlockDriverState *bs, const char *filename,
246 int bdrv_flags, int open_flags)
248 BDRVRawState *s = bs->opaque;
251 ret = raw_normalize_devicepath(&filename);
256 s->open_flags = open_flags;
257 raw_parse_flags(bdrv_flags, &s->open_flags);
260 fd = qemu_open(filename, s->open_flags, 0644);
269 /* We're falling back to POSIX AIO in some cases so init always */
270 if (paio_init() < 0) {
274 #ifdef CONFIG_LINUX_AIO
275 if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) {
281 if (platform_test_xfs_fd(s->fd)) {
293 static int raw_open(BlockDriverState *bs, const char *filename, int flags)
295 BDRVRawState *s = bs->opaque;
297 s->type = FTYPE_FILE;
298 return raw_open_common(bs, filename, flags, 0);
301 static int raw_reopen_prepare(BDRVReopenState *state,
302 BlockReopenQueue *queue, Error **errp)
305 BDRVRawReopenState *raw_s;
308 assert(state != NULL);
309 assert(state->bs != NULL);
311 s = state->bs->opaque;
313 state->opaque = g_malloc0(sizeof(BDRVRawReopenState));
314 raw_s = state->opaque;
316 #ifdef CONFIG_LINUX_AIO
317 raw_s->use_aio = s->use_aio;
319 /* we can use s->aio_ctx instead of a copy, because the use_aio flag is
320 * valid in the 'false' condition even if aio_ctx is set, and raw_set_aio()
321 * won't override aio_ctx if aio_ctx is non-NULL */
322 if (raw_set_aio(&s->aio_ctx, &raw_s->use_aio, state->flags)) {
327 raw_parse_flags(state->flags, &raw_s->open_flags);
331 int fcntl_flags = O_APPEND | O_ASYNC | O_NONBLOCK;
333 fcntl_flags |= O_NOATIME;
336 if ((raw_s->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) {
337 /* dup the original fd */
338 /* TODO: use qemu fcntl wrapper */
339 #ifdef F_DUPFD_CLOEXEC
340 raw_s->fd = fcntl(s->fd, F_DUPFD_CLOEXEC, 0);
342 raw_s->fd = dup(s->fd);
343 if (raw_s->fd != -1) {
344 qemu_set_cloexec(raw_s->fd);
347 if (raw_s->fd >= 0) {
348 ret = fcntl_setfl(raw_s->fd, raw_s->open_flags);
350 qemu_close(raw_s->fd);
356 /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */
357 if (raw_s->fd == -1) {
358 assert(!(raw_s->open_flags & O_CREAT));
359 raw_s->fd = qemu_open(state->bs->filename, raw_s->open_flags);
360 if (raw_s->fd == -1) {
368 static void raw_reopen_commit(BDRVReopenState *state)
370 BDRVRawReopenState *raw_s = state->opaque;
371 BDRVRawState *s = state->bs->opaque;
373 s->open_flags = raw_s->open_flags;
377 #ifdef CONFIG_LINUX_AIO
378 s->use_aio = raw_s->use_aio;
381 g_free(state->opaque);
382 state->opaque = NULL;
386 static void raw_reopen_abort(BDRVReopenState *state)
388 BDRVRawReopenState *raw_s = state->opaque;
390 /* nothing to do if NULL, we didn't get far enough */
395 if (raw_s->fd >= 0) {
396 qemu_close(raw_s->fd);
399 g_free(state->opaque);
400 state->opaque = NULL;
404 /* XXX: use host sector size if necessary with:
405 #ifdef DIOCGSECTORSIZE
407 unsigned int sectorsize = 512;
408 if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
409 sectorsize > bufsize)
410 bufsize = sectorsize;
414 uint32_t blockSize = 512;
415 if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
422 * Check if all memory in this vector is sector aligned.
424 static int qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
428 for (i = 0; i < qiov->niov; i++) {
429 if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
437 static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
438 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
439 BlockDriverCompletionFunc *cb, void *opaque, int type)
441 BDRVRawState *s = bs->opaque;
447 * If O_DIRECT is used the buffer needs to be aligned on a sector
448 * boundary. Check if this is the case or tell the low-level
449 * driver that it needs to copy the buffer.
451 if ((bs->open_flags & BDRV_O_NOCACHE)) {
452 if (!qiov_is_aligned(bs, qiov)) {
453 type |= QEMU_AIO_MISALIGNED;
454 #ifdef CONFIG_LINUX_AIO
455 } else if (s->use_aio) {
456 return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
457 nb_sectors, cb, opaque, type);
462 return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
466 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
467 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
468 BlockDriverCompletionFunc *cb, void *opaque)
470 return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
471 cb, opaque, QEMU_AIO_READ);
474 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
475 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
476 BlockDriverCompletionFunc *cb, void *opaque)
478 return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
479 cb, opaque, QEMU_AIO_WRITE);
482 static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
483 BlockDriverCompletionFunc *cb, void *opaque)
485 BDRVRawState *s = bs->opaque;
490 return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
493 static void raw_close(BlockDriverState *bs)
495 BDRVRawState *s = bs->opaque;
502 static int raw_truncate(BlockDriverState *bs, int64_t offset)
504 BDRVRawState *s = bs->opaque;
507 if (fstat(s->fd, &st)) {
511 if (S_ISREG(st.st_mode)) {
512 if (ftruncate(s->fd, offset) < 0) {
515 } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
516 if (offset > raw_getlength(bs)) {
527 static int64_t raw_getlength(BlockDriverState *bs)
529 BDRVRawState *s = bs->opaque;
535 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
538 if (ioctl(fd, DIOCGDINFO, &dl))
540 return (uint64_t)dl.d_secsize *
541 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
545 #elif defined(__NetBSD__)
546 static int64_t raw_getlength(BlockDriverState *bs)
548 BDRVRawState *s = bs->opaque;
554 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
555 struct dkwedge_info dkw;
557 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) {
558 return dkw.dkw_size * 512;
562 if (ioctl(fd, DIOCGDINFO, &dl))
564 return (uint64_t)dl.d_secsize *
565 dl.d_partitions[DISKPART(st.st_rdev)].p_size;
570 #elif defined(__sun__)
571 static int64_t raw_getlength(BlockDriverState *bs)
573 BDRVRawState *s = bs->opaque;
574 struct dk_minfo minfo;
583 * Use the DKIOCGMEDIAINFO ioctl to read the size.
585 ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo);
587 return minfo.dki_lbsize * minfo.dki_capacity;
591 * There are reports that lseek on some devices fails, but
592 * irc discussion said that contingency on contingency was overkill.
594 return lseek(s->fd, 0, SEEK_END);
596 #elif defined(CONFIG_BSD)
597 static int64_t raw_getlength(BlockDriverState *bs)
599 BDRVRawState *s = bs->opaque;
603 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
612 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
615 if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
616 #ifdef DIOCGMEDIASIZE
617 if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
618 #elif defined(DIOCGPART)
621 if (ioctl(fd, DIOCGPART, &pi) == 0)
622 size = pi.media_size;
628 #if defined(__APPLE__) && defined(__MACH__)
629 size = LONG_LONG_MAX;
631 size = lseek(fd, 0LL, SEEK_END);
633 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
636 /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
637 if (size == 2048LL * (unsigned)-1)
639 /* XXX no disc? maybe we need to reopen... */
640 if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
647 size = lseek(fd, 0, SEEK_END);
652 static int64_t raw_getlength(BlockDriverState *bs)
654 BDRVRawState *s = bs->opaque;
662 return lseek(s->fd, 0, SEEK_END);
666 static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
669 BDRVRawState *s = bs->opaque;
671 if (fstat(s->fd, &st) < 0) {
674 return (int64_t)st.st_blocks * 512;
677 static int raw_create(const char *filename, QEMUOptionParameter *options)
681 int64_t total_size = 0;
683 /* Read out options */
684 while (options && options->name) {
685 if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
686 total_size = options->value.n / BDRV_SECTOR_SIZE;
691 fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
696 if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) {
699 if (qemu_close(fd) != 0) {
707 * Returns true iff the specified sector is present in the disk image. Drivers
708 * not implementing the functionality are assumed to not support backing files,
709 * hence all their sectors are reported as allocated.
711 * If 'sector_num' is beyond the end of the disk image the return value is 0
712 * and 'pnum' is set to 0.
714 * 'pnum' is set to the number of sectors (including and immediately following
715 * the specified sector) that are known to be in the same
716 * allocated/unallocated state.
718 * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
719 * beyond the end of the disk image it will be clamped.
721 static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs,
723 int nb_sectors, int *pnum)
725 off_t start, data, hole;
733 start = sector_num * BDRV_SECTOR_SIZE;
737 BDRVRawState *s = bs->opaque;
740 struct fiemap_extent fe;
743 f.fm.fm_start = start;
744 f.fm.fm_length = (int64_t)nb_sectors * BDRV_SECTOR_SIZE;
746 f.fm.fm_extent_count = 1;
747 f.fm.fm_reserved = 0;
748 if (ioctl(s->fd, FS_IOC_FIEMAP, &f) == -1) {
749 /* Assume everything is allocated. */
754 if (f.fm.fm_mapped_extents == 0) {
755 /* No extents found, data is beyond f.fm.fm_start + f.fm.fm_length.
756 * f.fm.fm_start + f.fm.fm_length must be clamped to the file size!
758 off_t length = lseek(s->fd, 0, SEEK_END);
759 hole = f.fm.fm_start;
760 data = MIN(f.fm.fm_start + f.fm.fm_length, length);
762 data = f.fe.fe_logical;
763 hole = f.fe.fe_logical + f.fe.fe_length;
766 #elif defined SEEK_HOLE && defined SEEK_DATA
768 BDRVRawState *s = bs->opaque;
770 hole = lseek(s->fd, start, SEEK_HOLE);
772 /* -ENXIO indicates that sector_num was past the end of the file.
773 * There is a virtual hole there. */
774 assert(errno != -ENXIO);
776 /* Most likely EINVAL. Assume everything is allocated. */
784 /* On a hole. We need another syscall to find its end. */
785 data = lseek(s->fd, start, SEEK_DATA);
787 data = lseek(s->fd, 0, SEEK_END);
796 /* On a data extent, compute sectors to the end of the extent. */
797 *pnum = MIN(nb_sectors, (hole - start) / BDRV_SECTOR_SIZE);
800 /* On a hole, compute sectors to the beginning of the next extent. */
801 *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE);
807 static int xfs_discard(BDRVRawState *s, int64_t sector_num, int nb_sectors)
809 struct xfs_flock64 fl;
811 memset(&fl, 0, sizeof(fl));
812 fl.l_whence = SEEK_SET;
813 fl.l_start = sector_num << 9;
814 fl.l_len = (int64_t)nb_sectors << 9;
816 if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) {
817 DEBUG_BLOCK_PRINT("cannot punch hole (%s)\n", strerror(errno));
825 static coroutine_fn int raw_co_discard(BlockDriverState *bs,
826 int64_t sector_num, int nb_sectors)
829 BDRVRawState *s = bs->opaque;
832 return xfs_discard(s, sector_num, nb_sectors);
839 static QEMUOptionParameter raw_create_options[] = {
841 .name = BLOCK_OPT_SIZE,
843 .help = "Virtual disk size"
848 static BlockDriver bdrv_file = {
849 .format_name = "file",
850 .protocol_name = "file",
851 .instance_size = sizeof(BDRVRawState),
852 .bdrv_probe = NULL, /* no probe for protocols */
853 .bdrv_file_open = raw_open,
854 .bdrv_reopen_prepare = raw_reopen_prepare,
855 .bdrv_reopen_commit = raw_reopen_commit,
856 .bdrv_reopen_abort = raw_reopen_abort,
857 .bdrv_close = raw_close,
858 .bdrv_create = raw_create,
859 .bdrv_co_discard = raw_co_discard,
860 .bdrv_co_is_allocated = raw_co_is_allocated,
862 .bdrv_aio_readv = raw_aio_readv,
863 .bdrv_aio_writev = raw_aio_writev,
864 .bdrv_aio_flush = raw_aio_flush,
866 .bdrv_truncate = raw_truncate,
867 .bdrv_getlength = raw_getlength,
868 .bdrv_get_allocated_file_size
869 = raw_get_allocated_file_size,
871 .create_options = raw_create_options,
874 /***********************************************/
877 #if defined(__APPLE__) && defined(__MACH__)
878 static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
879 static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
881 kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
883 kern_return_t kernResult;
884 mach_port_t masterPort;
885 CFMutableDictionaryRef classesToMatch;
887 kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
888 if ( KERN_SUCCESS != kernResult ) {
889 printf( "IOMasterPort returned %d\n", kernResult );
892 classesToMatch = IOServiceMatching( kIOCDMediaClass );
893 if ( classesToMatch == NULL ) {
894 printf( "IOServiceMatching returned a NULL dictionary.\n" );
896 CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
898 kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
899 if ( KERN_SUCCESS != kernResult )
901 printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
907 kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
909 io_object_t nextMedia;
910 kern_return_t kernResult = KERN_FAILURE;
912 nextMedia = IOIteratorNext( mediaIterator );
915 CFTypeRef bsdPathAsCFString;
916 bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
917 if ( bsdPathAsCFString ) {
918 size_t devPathLength;
919 strcpy( bsdPath, _PATH_DEV );
920 strcat( bsdPath, "r" );
921 devPathLength = strlen( bsdPath );
922 if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
923 kernResult = KERN_SUCCESS;
925 CFRelease( bsdPathAsCFString );
927 IOObjectRelease( nextMedia );
935 static int hdev_probe_device(const char *filename)
939 /* allow a dedicated CD-ROM driver to match with a higher priority */
940 if (strstart(filename, "/dev/cdrom", NULL))
943 if (stat(filename, &st) >= 0 &&
944 (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
951 static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
953 BDRVRawState *s = bs->opaque;
955 #if defined(__APPLE__) && defined(__MACH__)
956 if (strstart(filename, "/dev/cdrom", NULL)) {
957 kern_return_t kernResult;
958 io_iterator_t mediaIterator;
959 char bsdPath[ MAXPATHLEN ];
962 kernResult = FindEjectableCDMedia( &mediaIterator );
963 kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
965 if ( bsdPath[ 0 ] != '\0' ) {
966 strcat(bsdPath,"s0");
967 /* some CDs don't have a partition 0 */
968 fd = qemu_open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
970 bsdPath[strlen(bsdPath)-1] = '1';
978 IOObjectRelease( mediaIterator );
982 s->type = FTYPE_FILE;
983 #if defined(__linux__)
985 char resolved_path[ MAXPATHLEN ], *temp;
987 temp = realpath(filename, resolved_path);
988 if (temp && strstart(temp, "/dev/sg", NULL)) {
994 return raw_open_common(bs, filename, flags, 0);
997 #if defined(__linux__)
998 /* Note: we do not have a reliable method to detect if the floppy is
999 present. The current method is to try to open the floppy at every
1000 I/O and to keep it opened during a few hundreds of ms. */
1001 static int fd_open(BlockDriverState *bs)
1003 BDRVRawState *s = bs->opaque;
1004 int last_media_present;
1006 if (s->type != FTYPE_FD)
1008 last_media_present = (s->fd >= 0);
1010 (get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
1014 printf("Floppy closed\n");
1018 if (s->fd_got_error &&
1019 (get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) {
1021 printf("No floppy (open delayed)\n");
1025 s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK);
1027 s->fd_error_time = get_clock();
1028 s->fd_got_error = 1;
1029 if (last_media_present)
1030 s->fd_media_changed = 1;
1032 printf("No floppy\n");
1037 printf("Floppy opened\n");
1040 if (!last_media_present)
1041 s->fd_media_changed = 1;
1042 s->fd_open_time = get_clock();
1043 s->fd_got_error = 0;
1047 static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
1049 BDRVRawState *s = bs->opaque;
1051 return ioctl(s->fd, req, buf);
1054 static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
1055 unsigned long int req, void *buf,
1056 BlockDriverCompletionFunc *cb, void *opaque)
1058 BDRVRawState *s = bs->opaque;
1060 if (fd_open(bs) < 0)
1062 return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
1065 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
1066 static int fd_open(BlockDriverState *bs)
1068 BDRVRawState *s = bs->opaque;
1070 /* this is just to ensure s->fd is sane (its called by io ops) */
1075 #else /* !linux && !FreeBSD */
1077 static int fd_open(BlockDriverState *bs)
1082 #endif /* !linux && !FreeBSD */
1084 static int hdev_create(const char *filename, QEMUOptionParameter *options)
1088 struct stat stat_buf;
1089 int64_t total_size = 0;
1091 /* Read out options */
1092 while (options && options->name) {
1093 if (!strcmp(options->name, "size")) {
1094 total_size = options->value.n / BDRV_SECTOR_SIZE;
1099 fd = qemu_open(filename, O_WRONLY | O_BINARY);
1103 if (fstat(fd, &stat_buf) < 0)
1105 else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
1107 else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE)
1114 static int hdev_has_zero_init(BlockDriverState *bs)
1119 static BlockDriver bdrv_host_device = {
1120 .format_name = "host_device",
1121 .protocol_name = "host_device",
1122 .instance_size = sizeof(BDRVRawState),
1123 .bdrv_probe_device = hdev_probe_device,
1124 .bdrv_file_open = hdev_open,
1125 .bdrv_close = raw_close,
1126 .bdrv_create = hdev_create,
1127 .create_options = raw_create_options,
1128 .bdrv_has_zero_init = hdev_has_zero_init,
1130 .bdrv_aio_readv = raw_aio_readv,
1131 .bdrv_aio_writev = raw_aio_writev,
1132 .bdrv_aio_flush = raw_aio_flush,
1134 .bdrv_truncate = raw_truncate,
1135 .bdrv_getlength = raw_getlength,
1136 .bdrv_get_allocated_file_size
1137 = raw_get_allocated_file_size,
1139 /* generic scsi device */
1141 .bdrv_ioctl = hdev_ioctl,
1142 .bdrv_aio_ioctl = hdev_aio_ioctl,
1147 static int floppy_open(BlockDriverState *bs, const char *filename, int flags)
1149 BDRVRawState *s = bs->opaque;
1154 /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
1155 ret = raw_open_common(bs, filename, flags, O_NONBLOCK);
1159 /* close fd so that we can reopen it as needed */
1162 s->fd_media_changed = 1;
1167 static int floppy_probe_device(const char *filename)
1171 struct floppy_struct fdparam;
1174 if (strstart(filename, "/dev/fd", NULL) &&
1175 !strstart(filename, "/dev/fdset/", NULL)) {
1179 fd = qemu_open(filename, O_RDONLY | O_NONBLOCK);
1183 ret = fstat(fd, &st);
1184 if (ret == -1 || !S_ISBLK(st.st_mode)) {
1188 /* Attempt to detect via a floppy specific ioctl */
1189 ret = ioctl(fd, FDGETPRM, &fdparam);
1200 static int floppy_is_inserted(BlockDriverState *bs)
1202 return fd_open(bs) >= 0;
1205 static int floppy_media_changed(BlockDriverState *bs)
1207 BDRVRawState *s = bs->opaque;
1211 * XXX: we do not have a true media changed indication.
1212 * It does not work if the floppy is changed without trying to read it.
1215 ret = s->fd_media_changed;
1216 s->fd_media_changed = 0;
1218 printf("Floppy changed=%d\n", ret);
1223 static void floppy_eject(BlockDriverState *bs, bool eject_flag)
1225 BDRVRawState *s = bs->opaque;
1232 fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK);
1234 if (ioctl(fd, FDEJECT, 0) < 0)
1240 static BlockDriver bdrv_host_floppy = {
1241 .format_name = "host_floppy",
1242 .protocol_name = "host_floppy",
1243 .instance_size = sizeof(BDRVRawState),
1244 .bdrv_probe_device = floppy_probe_device,
1245 .bdrv_file_open = floppy_open,
1246 .bdrv_close = raw_close,
1247 .bdrv_create = hdev_create,
1248 .create_options = raw_create_options,
1249 .bdrv_has_zero_init = hdev_has_zero_init,
1251 .bdrv_aio_readv = raw_aio_readv,
1252 .bdrv_aio_writev = raw_aio_writev,
1253 .bdrv_aio_flush = raw_aio_flush,
1255 .bdrv_truncate = raw_truncate,
1256 .bdrv_getlength = raw_getlength,
1257 .bdrv_get_allocated_file_size
1258 = raw_get_allocated_file_size,
1260 /* removable device support */
1261 .bdrv_is_inserted = floppy_is_inserted,
1262 .bdrv_media_changed = floppy_media_changed,
1263 .bdrv_eject = floppy_eject,
1266 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1268 BDRVRawState *s = bs->opaque;
1272 /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
1273 return raw_open_common(bs, filename, flags, O_NONBLOCK);
1276 static int cdrom_probe_device(const char *filename)
1282 fd = qemu_open(filename, O_RDONLY | O_NONBLOCK);
1286 ret = fstat(fd, &st);
1287 if (ret == -1 || !S_ISBLK(st.st_mode)) {
1291 /* Attempt to detect via a CDROM specific ioctl */
1292 ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1302 static int cdrom_is_inserted(BlockDriverState *bs)
1304 BDRVRawState *s = bs->opaque;
1307 ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
1308 if (ret == CDS_DISC_OK)
1313 static void cdrom_eject(BlockDriverState *bs, bool eject_flag)
1315 BDRVRawState *s = bs->opaque;
1318 if (ioctl(s->fd, CDROMEJECT, NULL) < 0)
1319 perror("CDROMEJECT");
1321 if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0)
1322 perror("CDROMEJECT");
1326 static void cdrom_lock_medium(BlockDriverState *bs, bool locked)
1328 BDRVRawState *s = bs->opaque;
1330 if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) {
1332 * Note: an error can happen if the distribution automatically
1335 /* perror("CDROM_LOCKDOOR"); */
1339 static BlockDriver bdrv_host_cdrom = {
1340 .format_name = "host_cdrom",
1341 .protocol_name = "host_cdrom",
1342 .instance_size = sizeof(BDRVRawState),
1343 .bdrv_probe_device = cdrom_probe_device,
1344 .bdrv_file_open = cdrom_open,
1345 .bdrv_close = raw_close,
1346 .bdrv_create = hdev_create,
1347 .create_options = raw_create_options,
1348 .bdrv_has_zero_init = hdev_has_zero_init,
1350 .bdrv_aio_readv = raw_aio_readv,
1351 .bdrv_aio_writev = raw_aio_writev,
1352 .bdrv_aio_flush = raw_aio_flush,
1354 .bdrv_truncate = raw_truncate,
1355 .bdrv_getlength = raw_getlength,
1356 .bdrv_get_allocated_file_size
1357 = raw_get_allocated_file_size,
1359 /* removable device support */
1360 .bdrv_is_inserted = cdrom_is_inserted,
1361 .bdrv_eject = cdrom_eject,
1362 .bdrv_lock_medium = cdrom_lock_medium,
1364 /* generic scsi device */
1365 .bdrv_ioctl = hdev_ioctl,
1366 .bdrv_aio_ioctl = hdev_aio_ioctl,
1368 #endif /* __linux__ */
1370 #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
1371 static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
1373 BDRVRawState *s = bs->opaque;
1378 ret = raw_open_common(bs, filename, flags, 0);
1382 /* make sure the door isn't locked at this time */
1383 ioctl(s->fd, CDIOCALLOW);
1387 static int cdrom_probe_device(const char *filename)
1389 if (strstart(filename, "/dev/cd", NULL) ||
1390 strstart(filename, "/dev/acd", NULL))
1395 static int cdrom_reopen(BlockDriverState *bs)
1397 BDRVRawState *s = bs->opaque;
1401 * Force reread of possibly changed/newly loaded disc,
1402 * FreeBSD seems to not notice sometimes...
1406 fd = qemu_open(bs->filename, s->open_flags, 0644);
1413 /* make sure the door isn't locked at this time */
1414 ioctl(s->fd, CDIOCALLOW);
1418 static int cdrom_is_inserted(BlockDriverState *bs)
1420 return raw_getlength(bs) > 0;
1423 static void cdrom_eject(BlockDriverState *bs, bool eject_flag)
1425 BDRVRawState *s = bs->opaque;
1430 (void) ioctl(s->fd, CDIOCALLOW);
1433 if (ioctl(s->fd, CDIOCEJECT) < 0)
1434 perror("CDIOCEJECT");
1436 if (ioctl(s->fd, CDIOCCLOSE) < 0)
1437 perror("CDIOCCLOSE");
1443 static void cdrom_lock_medium(BlockDriverState *bs, bool locked)
1445 BDRVRawState *s = bs->opaque;
1449 if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
1451 * Note: an error can happen if the distribution automatically
1454 /* perror("CDROM_LOCKDOOR"); */
1458 static BlockDriver bdrv_host_cdrom = {
1459 .format_name = "host_cdrom",
1460 .protocol_name = "host_cdrom",
1461 .instance_size = sizeof(BDRVRawState),
1462 .bdrv_probe_device = cdrom_probe_device,
1463 .bdrv_file_open = cdrom_open,
1464 .bdrv_close = raw_close,
1465 .bdrv_create = hdev_create,
1466 .create_options = raw_create_options,
1467 .bdrv_has_zero_init = hdev_has_zero_init,
1469 .bdrv_aio_readv = raw_aio_readv,
1470 .bdrv_aio_writev = raw_aio_writev,
1471 .bdrv_aio_flush = raw_aio_flush,
1473 .bdrv_truncate = raw_truncate,
1474 .bdrv_getlength = raw_getlength,
1475 .bdrv_get_allocated_file_size
1476 = raw_get_allocated_file_size,
1478 /* removable device support */
1479 .bdrv_is_inserted = cdrom_is_inserted,
1480 .bdrv_eject = cdrom_eject,
1481 .bdrv_lock_medium = cdrom_lock_medium,
1483 #endif /* __FreeBSD__ */
1485 static void bdrv_file_init(void)
1488 * Register all the drivers. Note that order is important, the driver
1489 * registered last will get probed first.
1491 bdrv_register(&bdrv_file);
1492 bdrv_register(&bdrv_host_device);
1494 bdrv_register(&bdrv_host_floppy);
1495 bdrv_register(&bdrv_host_cdrom);
1497 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
1498 bdrv_register(&bdrv_host_cdrom);
1502 block_init(bdrv_file_init);