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block: Reduce bdrv_aligned_preadv() rounding

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Now that bdrv_is_allocated accepts non-aligned inputs, we can
remove the TODO added in commit d6a644bb.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Eric Blake 2017-10-11 22:47:18 -05:00 committed by Kevin Wolf
parent efa6e2ed64
commit 88e63df214
1 changed files with 2 additions and 6 deletions
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8
block/io.c
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@ -1124,18 +1124,14 @@ static int coroutine_fn bdrv_aligned_preadv(BdrvChild *child,
}
if (flags & BDRV_REQ_COPY_ON_READ) {
/* TODO: Simplify further once bdrv_is_allocated no longer
* requires sector alignment */
int64_t start = QEMU_ALIGN_DOWN(offset, BDRV_SECTOR_SIZE);
int64_t end = QEMU_ALIGN_UP(offset + bytes, BDRV_SECTOR_SIZE);
int64_t pnum;
ret = bdrv_is_allocated(bs, start, end - start, &pnum);
ret = bdrv_is_allocated(bs, offset, bytes, &pnum);
if (ret < 0) {
goto out;
}
if (!ret || pnum != end - start) {
if (!ret || pnum != bytes) {
ret = bdrv_co_do_copy_on_readv(child, offset, bytes, qiov);
goto out;
}