rbd: BUG on invalid layout

This shouldn't actually be possible because the layout struct is
constructed from the RBD header and validated then.

[elder@inktank.com: converted BUG() call to equivalent rbd_assert()]

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 2f1bef8c1d88..bb3d9be3b1b4 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1020,8 +1020,9 @@ static int rbd_do_request(struct request *rq,
         layout->fl_stripe_count = cpu_to_le32(1);
         layout->fl_object_size = cpu_to_le32(1 << RBD_MAX_OBJ_ORDER);
         layout->fl_pg_pool = cpu_to_le32(rbd_dev->pool_id);
-        ceph_calc_raw_layout(osdc, layout, snapid, ofs, &len, &bno,
-                                req, ops);
+        ret = ceph_calc_raw_layout(osdc, layout, snapid, ofs, &len, &bno,
+                                   req, ops);
+        rbd_assert(ret == 0);
 
         ceph_osdc_build_request(req, ofs, &len,
                                 ops,