From 688a9024e2bc8d07cdc62e287dfb048722cf96df Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Tue, 20 Nov 2012 10:53:39 -0500
Subject: NFSv4.1: Adjust CREATE_SESSION arguments when mounting a new
 filesystem

If we're mounting a new filesystem, ensure that the session has negotiated
large enough request and reply sizes to match the wsize and rsize mount
arguments.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 3e572dc..ee82cddd 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -6037,9 +6037,22 @@ int nfs4_init_session(struct nfs_server *server)
 		session->fc_attrs.max_rqst_sz = target_max_rqst_sz;
 		session->fc_target_max_resp_sz = target_max_resp_sz;
 		session->fc_attrs.max_resp_sz = target_max_resp_sz;
+	} else {
+		/* Just adjust the targets */
+		if (target_max_rqst_sz > session->fc_target_max_rqst_sz) {
+			session->fc_target_max_rqst_sz = target_max_rqst_sz;
+			set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
+		}
+		if (target_max_resp_sz > session->fc_target_max_resp_sz) {
+			session->fc_target_max_resp_sz = target_max_resp_sz;
+			set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
+		}
 	}
 	spin_unlock(&clp->cl_lock);
 
+	if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
+		nfs4_schedule_lease_recovery(clp);
+
 	return nfs41_check_session_ready(clp);
 }
 
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