NFSv4: Don't tell server we rebooted when not necessary

Instead of doing a full setclientid, try doing a RENEW call first.

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

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 3cc88a5..a780518 100644 (file)
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1059,19 +1059,19 @@ static int nfs4_check_lease(struct nfs_client *clp)
        struct rpc_cred *cred;
        int status = -NFS4ERR_EXPIRED;
 
-       /* Are there any open files on this volume? */
+       /* Is the client already known to have an expired lease? */
+       if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
+               return 0;
        cred = nfs4_get_renew_cred(clp);
-       if (cred != NULL) {
-               /* Yes there are: try to renew the old lease */
-               status = nfs4_proc_renew(clp, cred);
-               put_rpccred(cred);
-               nfs4_recovery_handle_error(clp, status);
-               return status;
+       if (cred == NULL) {
+               cred = nfs4_get_setclientid_cred(clp);
+               if (cred == NULL)
+                       goto out;
        }
-
-       /* "reboot" to ensure we clear all state on the server */
-       clp->cl_boot_time = CURRENT_TIME;
-       set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+       status = nfs4_proc_renew(clp, cred);
+       put_rpccred(cred);
+out:
+       nfs4_recovery_handle_error(clp, status);
        return status;
 }