Commit dcfbece6 authored by Vladimir Sementsov-Ogievskiy's avatar Vladimir Sementsov-Ogievskiy Committed by Max Reitz
Browse files

block/block-copy: fix s->copy_size for compressed cluster 



0e240245 allowed writes larger than cluster, but that's
unsupported for compressed write. Fix it.

Fixes: 0e240245
Signed-off-by: default avatarVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20191029150934.26416-1-vsementsov@virtuozzo.com
Signed-off-by: default avatarMax Reitz <mreitz@redhat.com>
parent 407d22eb

block/block-copy.c

+2 −2
Original line number Diff line number Diff line
@@ -109,9 +109,9 @@ BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target, 
        s->use_copy_range = false;

        s->copy_size = cluster_size;

    } else if (write_flags & BDRV_REQ_WRITE_COMPRESSED) {

        /* Compression is not supported for copy_range */

        /* Compression supports only cluster-size writes and no copy-range. */

        s->use_copy_range = false;

        s->copy_size = MAX(cluster_size, BLOCK_COPY_MAX_BUFFER);

        s->copy_size = cluster_size;

    } else {

        /*

         * copy_range does not respect max_transfer (it's a TODO), so we factor