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-rw-r--r--fs/gfs2/jdata.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/gfs2/jdata.h b/fs/gfs2/jdata.h
new file mode 100644
index 00000000000..95e18fcb8f8
--- /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__ */