Add the BDRV_REQ_COPY_ON_READ and BDRV_REQ_PREFETCH flags to the supported_read_flags of the COR-filter.
Signed-off-by: Andrey Shinkevich <andrey.shinkev...@virtuozzo.com> --- block/copy-on-read.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/block/copy-on-read.c b/block/copy-on-read.c index 8178a91..a2b180a 100644 --- a/block/copy-on-read.c +++ b/block/copy-on-read.c @@ -50,6 +50,8 @@ static int cor_open(BlockDriverState *bs, QDict *options, int flags, return -EINVAL; } + bs->supported_read_flags = BDRV_REQ_COPY_ON_READ | BDRV_REQ_PREFETCH; + bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED | (BDRV_REQ_FUA & bs->file->bs->supported_write_flags); -- 1.8.3.1