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-rw-r--r--block/block-backend.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/block/block-backend.c b/block/block-backend.c
index c7e0f7b..7bc2eb1 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -31,6 +31,9 @@ struct BlockBackend {
/* TODO change to DeviceState when all users are qdevified */
const BlockDevOps *dev_ops;
void *dev_opaque;
+
+ /* the block size for which the guest device expects atomicity */
+ int guest_block_size;
};
typedef struct BlockBackendAIOCB {
@@ -351,7 +354,7 @@ void blk_detach_dev(BlockBackend *blk, void *dev)
blk->dev = NULL;
blk->dev_ops = NULL;
blk->dev_opaque = NULL;
- bdrv_set_guest_block_size(blk->bs, 512);
+ blk->guest_block_size = 512;
blk_unref(blk);
}
@@ -806,7 +809,7 @@ int blk_get_max_transfer_length(BlockBackend *blk)
void blk_set_guest_block_size(BlockBackend *blk, int align)
{
- bdrv_set_guest_block_size(blk->bs, align);
+ blk->guest_block_size = align;
}
void *blk_blockalign(BlockBackend *blk, size_t size)
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