NFS: added FREE_STATEID call

FREE_STATEID is used to tell the server that we want to free a stateid
that no longer has any locks associated with it.  This allows the client
to reclaim locks without encountering edge conditions documented in
section 8.4.3 of RFC 5661.

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

2 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index efe07f7a8765..a3c4bc800dce 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -565,6 +565,7 @@ enum {
         NFSPROC4_CLNT_LAYOUTRETURN,
         NFSPROC4_CLNT_SECINFO_NO_NAME,
         NFSPROC4_CLNT_TEST_STATEID,
+        NFSPROC4_CLNT_FREE_STATEID,
 };
 
 /* nfs41 types */
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index e696c1fb139a..209455561749 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1102,6 +1102,16 @@ struct nfs41_test_stateid_res {
         struct nfs4_sequence_res        seq_res;
 };
 
+struct nfs41_free_stateid_args {
+        nfs4_stateid                    *stateid;
+        struct nfs4_sequence_args       seq_args;
+};
+
+struct nfs41_free_stateid_res {
+        unsigned int                    status;
+        struct nfs4_sequence_res        seq_res;
+};
+
 #endif /* CONFIG_NFS_V4_1 */
 
 struct nfs_page;