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>
(based on commit 6cae3717cddaf8e5e96e304733dca66e40d56f89)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index cf3ce69..f1375d9 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -930,8 +930,9 @@ static int rbd_do_request(struct request *rq,
        layout->fl_object_size = cpu_to_le32(1 << RBD_MAX_OBJ_ORDER);
        layout->fl_pg_preferred = cpu_to_le32(-1);
        layout->fl_pg_pool = cpu_to_le32(dev->poolid);
-       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);
+       BUG_ON(ret != 0);
 
        ceph_osdc_build_request(req, ofs, &len,
                                ops,