nfs41: only retry EXCHANGE_ID on recoverable errors

Stops an infinite loop of EXCHANGE_ID.

Signed-off-by: Andy Adamson <andros@netapp.com>
[fixed checkpatch warnings]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 7dc9713..2cc0aca 100644 (file)
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1183,6 +1183,27 @@ static int nfs4_reset_session(struct nfs_client *clp) { return 0; }
 static int nfs4_initialize_session(struct nfs_client *clp) { return 0; }
 #endif /* CONFIG_NFS_V4_1 */
 
+/* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors
+ * on EXCHANGE_ID for v4.1
+ */
+static void nfs4_set_lease_expired(struct nfs_client *clp, int status)
+{
+       if (nfs4_has_session(clp)) {
+               switch (status) {
+               case -NFS4ERR_DELAY:
+               case -NFS4ERR_CLID_INUSE:
+               case -EAGAIN:
+                       break;
+
+               case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery
+                                        * in nfs4_exchange_id */
+               default:
+                       return;
+               }
+       }
+       set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+}
+
 static void nfs4_state_manager(struct nfs_client *clp)
 {
        int status = 0;
@@ -1193,7 +1214,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
                        /* We're going to have to re-establish a clientid */
                        status = nfs4_reclaim_lease(clp);
                        if (status) {
-                               set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+                               nfs4_set_lease_expired(clp, status);
                                if (status == -EAGAIN)
                                        continue;
                                if (clp->cl_cons_state ==