NFS: Added TEST_STATEID call

This patch adds in the xdr for doing a TEST_STATEID call with a single
stateid. RFC 5661 allows multiple stateids to be tested in a single
call, but only testing one keeps things simpler for now.

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

1 files changed, 28 insertions, 0 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 892bff53f61d..5612ba997db7 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -6015,6 +6015,34 @@ out_freepage:
 out:
         return err;
 }
+static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
+{
+        int status;
+        struct nfs41_test_stateid_args args = {
+                .stateid = &state->stateid,
+        };
+        struct nfs41_test_stateid_res res;
+        struct rpc_message msg = {
+                .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
+                .rpc_argp = &args,
+                .rpc_resp = &res,
+        };
+        args.seq_args.sa_session = res.seq_res.sr_session = NULL;
+        status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
+        return status;
+}
+
+static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
+{
+        struct nfs4_exception exception = { };
+        int err;
+        do {
+                err = nfs4_handle_exception(server,
+                                _nfs41_test_stateid(server, state),
+                                &exception);
+        } while (exception.retry);
+        return err;
+}
 #endif /* CONFIG_NFS_V4_1 */
 
 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {