1 files changed, 22 insertions, 2 deletions

diff --git a/include/linux/lockd/bind.h b/include/linux/lockd/bind.h
index 140edab64446..05728396a1a1 100644
--- a/include/linux/lockd/bind.h
+++ b/include/linux/lockd/bind.h
@@ -18,6 +18,7 @@
 
 /* Dummy declarations */
 struct svc_rqst;
+struct rpc_task;
 
 /*
  * This is the set of functions for lockd->nfsd communication
@@ -43,6 +44,7 @@ struct nlmclnt_initdata {
         u32                     nfs_version;
         int                     noresvport;
         struct net              *net;
+        const struct nlmclnt_operations *nlmclnt_ops;
 };
 
 /*
@@ -52,8 +54,26 @@ struct nlmclnt_initdata {
 extern struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init);
 extern void     nlmclnt_done(struct nlm_host *host);
 
-extern int      nlmclnt_proc(struct nlm_host *host, int cmd,
-                                        struct file_lock *fl);
+/*
+ * NLM client operations provide a means to modify RPC processing of NLM
+ * requests.  Callbacks receive a pointer to data passed into the call to
+ * nlmclnt_proc().
+ */
+struct nlmclnt_operations {
+        /* Called on successful allocation of nlm_rqst, use for allocation or
+         * reference counting. */
+        void (*nlmclnt_alloc_call)(void *);
+
+        /* Called in rpc_task_prepare for unlock.  A return value of true
+         * indicates the callback has put the task to sleep on a waitqueue
+         * and NLM should not call rpc_call_start(). */
+        bool (*nlmclnt_unlock_prepare)(struct rpc_task*, void *);
+
+        /* Called when the nlm_rqst is freed, callbacks should clean up here */
+        void (*nlmclnt_release_call)(void *);
+};
+
+extern int      nlmclnt_proc(struct nlm_host *host, int cmd, struct file_lock *fl, void *data);
 extern int      lockd_up(struct net *net);
 extern void     lockd_down(struct net *net);