ocfs2: POSIX file locks support

[linux-2.6-omap-h63xx.git] / fs / ocfs2 / stackglue.h

diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h
index db56281dd1be48d5282ce1aaf0c2b1472c1d8f88..c571af375ef87b98e6e24aad5d44c6fd7e114163 100644 (file)
--- a/fs/ocfs2/stackglue.h
+++ b/fs/ocfs2/stackglue.h
@@ -28,6 +28,10 @@
 #include "dlm/dlmapi.h"
 #include <linux/dlm.h>
 
+/* Needed for plock-related prototypes */
+struct file;
+struct file_lock;
+
 /*
  * dlmconstants.h does not have a LOCAL flag.  We hope to remove it
  * some day, but right now we need it.  Let's fake it.  This value is larger
@@ -186,6 +190,17 @@ struct ocfs2_stack_operations {
         */
        void *(*lock_lvb)(union ocfs2_dlm_lksb *lksb);
 
+       /*
+        * Cluster-aware posix locks
+        *
+        * This is NULL for stacks which do not support posix locks.
+        */
+       int (*plock)(struct ocfs2_cluster_connection *conn,
+                    u64 ino,
+                    struct file *file,
+                    int cmd,
+                    struct file_lock *fl);
+
        /*
         * This is an optoinal debugging hook.  If provided, the
         * stack can dump debugging information about this lock.
@@ -240,6 +255,10 @@ int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb);
 void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb);
 void ocfs2_dlm_dump_lksb(union ocfs2_dlm_lksb *lksb);
 
+int ocfs2_stack_supports_plocks(void);
+int ocfs2_plock(struct ocfs2_cluster_connection *conn, u64 ino,
+               struct file *file, int cmd, struct file_lock *fl);
+
 void ocfs2_stack_glue_set_locking_protocol(struct ocfs2_locking_protocol *proto);