nfsd4: implement backchannel_ctl operation

This operation is mandatory for servers to implement.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index dbbbd2fe5236..4023e77687ee 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1865,6 +1865,20 @@ static __be32 nfsd4_map_bcts_dir(u32 *dir)
         return nfserr_inval;
 }
 
+__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
+{
+        struct nfsd4_session *session = cstate->session;
+
+        spin_lock(&client_lock);
+        session->se_cb_prog = bc->bc_cb_program;
+        session->se_cb_sec = bc->bc_cb_sec;
+        spin_unlock(&client_lock);
+
+        nfsd4_probe_callback(session->se_client);
+
+        return nfs_ok;
+}
+
 __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
                      struct nfsd4_compound_state *cstate,
                      struct nfsd4_bind_conn_to_session *bcts)