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>

1 files changed, 13 insertions, 0 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 3e572dc316e4..ee82cdddeebe 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);
 }