NFSv4: Cap the transport reconnection timer at 1/2 lease period

We don't want to miss a lease period renewal due to the TCP connection
failing to reconnect in a timely fashion. To ensure this doesn't happen,
cap the reconnection timer so that we retry the connection attempt
at least every 1/2 lease period.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index b6810c92b8bb..5c02b0691587 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -195,6 +195,8 @@ int		rpc_clnt_add_xprt(struct rpc_clnt *, struct xprt_create *,
                                 struct rpc_xprt *,
                                 void *),
                         void *data);
+void            rpc_cap_max_reconnect_timeout(struct rpc_clnt *clnt,
+                        unsigned long timeo);
 
 const char *rpc_proc_name(const struct rpc_task *task);
 #endif /* __KERNEL__ */