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block: Detect unaligned length in bdrv_qiov_is_aligned()

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For an O_DIRECT request to succeed, it's not only necessary that all
base addresses in the qiov are aligned, but also that each length in it
is aligned.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2013-12-05 13:01:46 +01:00
parent e5354657a6
commit 1ff735bdc4
1 changed files with 3 additions and 0 deletions
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block.c
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@ -4811,6 +4811,9 @@ bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) { if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
return false; return false;
} }
if (qiov->iov[i].iov_len % bs->buffer_alignment) {
return false;
}
} }
return true; return true;