ENOTSUPP is not a standard errno (it shows up as "Unknown error 524" in an error message). This is what was getting produced when the the local rbd code does not implement features required by a discovered rbd image. Change the error code returned in this case to ENXIO. Signed-off-by: Alex Elder <elder@xxxxxxxxxxx> --- drivers/block/rbd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index ce26b749..4daa400 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2456,7 +2456,7 @@ static int _rbd_dev_v2_snap_features(struct rbd_device *rbd_dev, u64 snap_id, incompat = le64_to_cpu(features_buf.incompat); if (incompat & ~RBD_FEATURES_ALL) - return -ENOTSUPP; + return -ENXIO; *snap_features = le64_to_cpu(features_buf.features); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html