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Fix opening of read only raw images 

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Blue Swirl 2009-06-17 18:27:44 +03:00
parent 5c55ff99fa
commit 19a3da7f4d
1 changed files with 15 additions and 16 deletions
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31
block/raw-posix.c
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@ -123,7 +123,7 @@ static int cdrom_reopen(BlockDriverState *bs);
#endif
static int raw_open_common(BlockDriverState *bs, const char *filename,
int flags)
int bdrv_flags, int open_flags)
{
BDRVRawState *s = bs->opaque;
int fd, ret;
@ -132,9 +132,9 @@ static int raw_open_common(BlockDriverState *bs, const char *filename,
s->lseek_err_cnt = 0;
s->open_flags |= O_BINARY;
s->open_flags = open_flags | O_BINARY;
s->open_flags &= ~O_ACCMODE;
if ((flags & BDRV_O_ACCESS) == BDRV_O_RDWR) {
if ((bdrv_flags & BDRV_O_ACCESS) == BDRV_O_RDWR) {
s->open_flags |= O_RDWR;
} else {
s->open_flags |= O_RDONLY;
@ -143,9 +143,9 @@ static int raw_open_common(BlockDriverState *bs, const char *filename,
/* Use O_DSYNC for write-through caching, no flags for write-back caching,
* and O_DIRECT for no caching. */
if ((flags & BDRV_O_NOCACHE))
if ((bdrv_flags & BDRV_O_NOCACHE))
s->open_flags |= O_DIRECT;
else if (!(flags & BDRV_O_CACHE_WB))
else if (!(bdrv_flags & BDRV_O_CACHE_WB))
s->open_flags |= O_DSYNC;
s->fd = -1;
@ -158,7 +158,7 @@ static int raw_open_common(BlockDriverState *bs, const char *filename,
}
s->fd = fd;
s->aligned_buf = NULL;
if ((flags & BDRV_O_NOCACHE)) {
if ((bdrv_flags & BDRV_O_NOCACHE)) {
s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE);
if (s->aligned_buf == NULL) {
ret = -errno;
@ -172,12 +172,13 @@ static int raw_open_common(BlockDriverState *bs, const char *filename,
static int raw_open(BlockDriverState *bs, const char *filename, int flags)
{
BDRVRawState *s = bs->opaque;
int open_flags = 0;
s->type = FTYPE_FILE;
if (flags & BDRV_O_CREAT)
s->open_flags |= O_CREAT | O_TRUNC;
open_flags = O_CREAT | O_TRUNC;
return raw_open_common(bs, filename, flags);
return raw_open_common(bs, filename, flags, open_flags);
}
/* XXX: use host sector size if necessary with:
@ -1008,7 +1009,7 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
}
#endif
return raw_open_common(bs, filename, flags);
return raw_open_common(bs, filename, flags, 0);
}
#if defined(__linux__)
@ -1186,10 +1187,9 @@ static int floppy_open(BlockDriverState *bs, const char *filename, int flags)
posix_aio_init();
s->type = FTYPE_FD;
/* open will not fail even if no floppy is inserted */
s->open_flags |= O_NONBLOCK;
ret = raw_open_common(bs, filename, flags);
/* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
ret = raw_open_common(bs, filename, flags, O_NONBLOCK);
if (ret)
return ret;
@ -1279,11 +1279,10 @@ static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
{
BDRVRawState *s = bs->opaque;
/* open will not fail even if no CD is inserted */
s->open_flags |= O_NONBLOCK;
s->type = FTYPE_CD;
return raw_open_common(bs, filename, flags);
/* open will not fail even if no CD is inserted, so add O_NONBLOCK */
return raw_open_common(bs, filename, flags, O_NONBLOCK);
}
static int cdrom_probe_device(const char *filename)
@ -1373,7 +1372,7 @@ static int cdrom_open(BlockDriverState *bs, const char *filename, int flags)
s->type = FTYPE_CD;
ret = raw_open_common(bs, filename, flags);
ret = raw_open_common(bs, filename, flags, 0);
if (ret)
return ret;