NFSD: Added TEST_STATEID operation

This operation is used by the client to check the validity of a list of
stateids.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index ed1784d..02fb0e0 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -342,6 +342,20 @@
 	nfs4_verifier	sc_confirm;
 };
 
+struct nfsd4_saved_compoundargs {
+	__be32 *p;
+	__be32 *end;
+	int pagelen;
+	struct page **pagelist;
+};
+
+struct nfsd4_test_stateid {
+	__be32		ts_num_ids;
+	__be32		ts_has_session;
+	struct nfsd4_compoundargs *ts_saved_args;
+	struct nfsd4_saved_compoundargs ts_savedp;
+};
+
 struct nfsd4_free_stateid {
 	stateid_t	fr_stateid;         /* request */
 	__be32		fr_status;          /* response */
@@ -437,6 +451,7 @@
 		struct nfsd4_destroy_session	destroy_session;
 		struct nfsd4_sequence		sequence;
 		struct nfsd4_reclaim_complete	reclaim_complete;
+		struct nfsd4_test_stateid	test_stateid;
 		struct nfsd4_free_stateid	free_stateid;
 	} u;
 	struct nfs4_replay *			replay;
@@ -570,6 +585,8 @@
 		struct nfsd4_compound_state *, struct nfsd4_delegreturn *dr);
 extern __be32 nfsd4_renew(struct svc_rqst *rqstp,
 			  struct nfsd4_compound_state *, clientid_t *clid);
+extern __be32 nfsd4_test_stateid(struct svc_rqst *rqstp,
+		struct nfsd4_compound_state *, struct nfsd4_test_stateid *test_stateid);
 extern __be32 nfsd4_free_stateid(struct svc_rqst *rqstp,
 		struct nfsd4_compound_state *, struct nfsd4_free_stateid *free_stateid);
 #endif