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authorKevin Wolf <kwolf@redhat.com>2013-12-05 13:01:46 +0100
committerKevin Wolf <kwolf@redhat.com>2014-01-24 17:40:01 +0100
commit1ff735bdc417945bc6df1857861b127644b3f461 (patch)
treede2c1a0a320ef717d2076de32969d5ecf070c9dd
parente5354657a626b325c31888f33de88ac6d39e2fcb (diff)
block: Detect unaligned length in bdrv_qiov_is_aligned()
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>
-rw-r--r--block.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/block.c b/block.c
index 9d0cfc46da..275d387354 100644
--- a/block.c
+++ b/block.c
@@ -4811,6 +4811,9 @@ bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
return false;
}
+ if (qiov->iov[i].iov_len % bs->buffer_alignment) {
+ return false;
+ }
}
return true;