nfsd: add more info to WARN_ON_ONCE on failed callbacks

Currently, you get the warning and stack trace, but nothing is printed
about the relevant error codes. Add that in.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index d756f44..dee9477 100644 (file)
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -1333,7 +1333,8 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
                return;
 
        if (cb->cb_status) {
-               WARN_ON_ONCE(task->tk_status);
+               WARN_ONCE(task->tk_status, "cb_status=%d tk_status=%d",
+                         cb->cb_status, task->tk_status);
                task->tk_status = cb->cb_status;
        }