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block/raw-posix: refactor handle_aiocb_write_zeroes a bit 

move code dealing with a block device to a separate function. This will
allow to implement additional processing for ordinary files.

Please note, that xfs_code has been moved before checking for
s->has_write_zeroes as xfs_write_zeroes does not touch this flag inside.
This makes code a bit more consistent.

CC: Kevin Wolf <kwolf@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Peter Lieven <pl@kamp.de>
CC: Fam Zheng <famz@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Denis V. Lunev 2015-01-30 11:42:13 +03:00 committed by Kevin Wolf
parent 0b99171230
commit 37cc9f7f68
1 changed files with 28 additions and 20 deletions
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48
block/raw-posix.c
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@ -914,41 +914,49 @@ static int do_fallocate(int fd, int mode, off_t offset, off_t len)
}
#endif
static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb)
static ssize_t handle_aiocb_write_zeroes_block(RawPosixAIOData *aiocb)
{
int ret = -EOPNOTSUPP;
int ret = -ENOTSUP;
BDRVRawState *s = aiocb->bs->opaque;
if (s->has_write_zeroes == 0) {
if (!s->has_write_zeroes) {
return -ENOTSUP;
}
if (aiocb->aio_type & QEMU_AIO_BLKDEV) {
#ifdef BLKZEROOUT
do {
uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes };
if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) {
return 0;
}
} while (errno == EINTR);
ret = -errno;
#endif
} else {
#ifdef CONFIG_XFS
if (s->is_xfs) {
return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes);
do {
uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes };
if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) {
return 0;
}
#endif
}
} while (errno == EINTR);
ret = translate_err(-errno);
#endif
ret = translate_err(ret);
if (ret == -ENOTSUP) {
s->has_write_zeroes = false;
}
return ret;
}
static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb)
{
BDRVRawState *s = aiocb->bs->opaque;
if (aiocb->aio_type & QEMU_AIO_BLKDEV) {
return handle_aiocb_write_zeroes_block(aiocb);
}
#ifdef CONFIG_XFS
if (s->is_xfs) {
return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes);
}
#endif
return -ENOTSUP;
}
static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb)
{
int ret = -EOPNOTSUPP;