1 files changed, 52 insertions, 0 deletions

diff --git a/fs/gfs2/jdata.h b/fs/gfs2/jdata.h
new file mode 100644
index 000000000000..95e18fcb8f82
--- /dev/null
+++ b/fs/gfs2/jdata.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v.2.
+ */
+
+#ifndef __FILE_DOT_H__
+#define __FILE_DOT_H__
+
+int gfs2_jdata_get_buffer(struct gfs2_inode *ip, uint64_t block, int new,
+                          struct buffer_head **bhp);
+
+typedef int (*read_copy_fn_t) (struct buffer_head *bh, char **buf,
+                               unsigned int offset, unsigned int size);
+typedef int (*write_copy_fn_t) (struct gfs2_inode *ip,
+                                struct buffer_head *bh, const char **buf,
+                                unsigned int offset, unsigned int size);
+
+int gfs2_copy2mem(struct buffer_head *bh, char **buf,
+                  unsigned int offset, unsigned int size);
+int gfs2_copy2user(struct buffer_head *bh, char __user **buf,
+                   unsigned int offset, unsigned int size);
+int gfs2_jdata_read(struct gfs2_inode *ip, char __user *buf,
+                    uint64_t offset, unsigned int size,
+                    read_copy_fn_t copy_fn);
+
+int gfs2_copy_from_mem(struct gfs2_inode *ip,
+                       struct buffer_head *bh, const char **buf,
+                       unsigned int offset, unsigned int size);
+int gfs2_copy_from_user(struct gfs2_inode *ip,
+                        struct buffer_head *bh, const char __user **buf,
+                        unsigned int offset, unsigned int size);
+int gfs2_jdata_write(struct gfs2_inode *ip, const char __user *buf,
+                     uint64_t offset, unsigned int size,
+                     write_copy_fn_t copy_fn);
+
+static inline int gfs2_jdata_read_mem(struct gfs2_inode *ip, char *buf,
+                                      uint64_t offset, unsigned int size)
+{
+        return gfs2_jdata_read(ip, (__force char __user *)buf, offset, size, gfs2_copy2mem);
+}
+
+static inline int gfs2_jdata_write_mem(struct gfs2_inode *ip, const char *buf,
+                                       uint64_t offset, unsigned int size)
+{
+        return gfs2_jdata_write(ip, (__force const char __user *)buf, offset, size, gfs2_copy_from_mem);
+}
+
+#endif /* __FILE_DOT_H__ */