1 files changed, 62 insertions, 0 deletions
diff --git a/fs/orangefs/orangefs-bufmap.h b/fs/orangefs/orangefs-bufmap.h
new file mode 100644
index 000000000000..91d1755c231a
--- /dev/null
+++ b/fs/orangefs/orangefs-bufmap.h
@@ -0,0 +1,62 @@
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#ifndef __ORANGEFS_BUFMAP_H
+#define __ORANGEFS_BUFMAP_H
+
+/* used to describe mapped buffers */
+struct orangefs_bufmap_desc {
+	void *uaddr;			/* user space address pointer */
+	struct page **page_array;	/* array of mapped pages */
+	int array_count;		/* size of above arrays */
+	struct list_head list_link;
+};
+
+struct orangefs_bufmap;
+
+struct orangefs_bufmap *orangefs_bufmap_ref(void);
+void orangefs_bufmap_unref(struct orangefs_bufmap *bufmap);
+
+/*
+ * orangefs_bufmap_size_query is now an inline function because buffer
+ * sizes are not hardcoded
+ */
+int orangefs_bufmap_size_query(void);
+
+int orangefs_bufmap_shift_query(void);
+
+int orangefs_bufmap_initialize(struct ORANGEFS_dev_map_desc *user_desc);
+
+int get_bufmap_init(void);
+
+void orangefs_bufmap_finalize(void);
+
+int orangefs_bufmap_get(struct orangefs_bufmap **mapp, int *buffer_index);
+
+void orangefs_bufmap_put(struct orangefs_bufmap *bufmap, int buffer_index);
+
+int readdir_index_get(struct orangefs_bufmap **mapp, int *buffer_index);
+
+void readdir_index_put(struct orangefs_bufmap *bufmap, int buffer_index);
+
+int orangefs_bufmap_copy_from_iovec(struct orangefs_bufmap *bufmap,
+				struct iov_iter *iter,
+				int buffer_index,
+				size_t size);
+
+int orangefs_bufmap_copy_to_iovec(struct orangefs_bufmap *bufmap,
+			      struct iov_iter *iter,
+			      int buffer_index,
+			      size_t size);
+
+size_t orangefs_bufmap_copy_to_user_task_iovec(struct task_struct *tsk,
+					   struct iovec *iovec,
+					   unsigned long nr_segs,
+					   struct orangefs_bufmap *bufmap,
+					   int buffer_index,
+					   size_t bytes_to_be_copied);
+
+#endif /* __ORANGEFS_BUFMAP_H */