[Qemu-devel] [PULL 08/36] qcow2: Get the request alignment for encrypted images from QCryptoBlock

[Kevin Wolf]

From: Alberto Garcia <address@hidden>

This doesn't have any practical effect at the moment because the
values of BDRV_SECTOR_SIZE, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE and
QCRYPTO_BLOCK_QCOW_SECTOR_SIZE are all the same (512 bytes), but
future encryption methods could have different requirements.

Signed-off-by: Alberto Garcia <address@hidden>
Reviewed-by: Daniel P. Berrangé <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
 block/qcow2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/qcow2.c b/block/qcow2.c
index de94b290e6..991d6ac91b 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1677,7 +1677,7 @@ static void qcow2_refresh_limits(BlockDriverState *bs, 
Error **errp)
 
     if (bs->encrypted) {
         /* Encryption works on a sector granularity */
-        bs->bl.request_alignment = BDRV_SECTOR_SIZE;
+        bs->bl.request_alignment = qcrypto_block_get_sector_size(s->crypto);
     }
     bs->bl.pwrite_zeroes_alignment = s->cluster_size;
     bs->bl.pdiscard_alignment = s->cluster_size;
-- 
2.19.1