blkverify's BDSs have a file BDS, but we do not want this to be preferred over the raw node. There is no way to decide between the two (and not really a reason to, either), so just return NULL in blkverify's implementation of bdrv_dirname().
Signed-off-by: Max Reitz <mre...@redhat.com> --- block/blkverify.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/block/blkverify.c b/block/blkverify.c index 38a8c68029..c72a1fba64 100644 --- a/block/blkverify.c +++ b/block/blkverify.c @@ -309,6 +309,15 @@ static void blkverify_refresh_filename(BlockDriverState *bs, QDict *options) } } +static char *blkverify_dirname(BlockDriverState *bs, Error **errp) +{ + /* In general, there are two BDSs with different dirnames below this one; + * so there is no unique dirname we could return (unless both are equal by + * chance). Therefore, to be consistent, just always return NULL. */ + error_setg(errp, "Cannot generate a base directory for blkverify nodes"); + return NULL; +} + static BlockDriver bdrv_blkverify = { .format_name = "blkverify", .protocol_name = "blkverify", @@ -319,6 +328,7 @@ static BlockDriver bdrv_blkverify = { .bdrv_close = blkverify_close, .bdrv_getlength = blkverify_getlength, .bdrv_refresh_filename = blkverify_refresh_filename, + .bdrv_dirname = blkverify_dirname, .bdrv_co_preadv = blkverify_co_preadv, .bdrv_co_pwritev = blkverify_co_pwritev, -- 2.11.0