1 files changed, 78 insertions, 0 deletions

diff --git a/fs/gfs2/meta_io.h b/fs/gfs2/meta_io.h
new file mode 100644
index 000000000000..3ec939e20dff
--- /dev/null
+++ b/fs/gfs2/meta_io.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
+ * Copyright (C) 2004-2006 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 version 2.
+ */
+
+#ifndef __DIO_DOT_H__
+#define __DIO_DOT_H__
+
+#include <linux/buffer_head.h>
+#include <linux/string.h>
+#include "incore.h"
+
+static inline void gfs2_buffer_clear(struct buffer_head *bh)
+{
+        memset(bh->b_data, 0, bh->b_size);
+}
+
+static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head)
+{
+        BUG_ON(head > bh->b_size);
+        memset(bh->b_data + head, 0, bh->b_size - head);
+}
+
+static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
+                                         int to_head,
+                                         struct buffer_head *from_bh,
+                                         int from_head)
+{
+        BUG_ON(from_head < to_head);
+        memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head,
+               from_bh->b_size - from_head);
+        memset(to_bh->b_data + to_bh->b_size + to_head - from_head,
+               0, from_head - to_head);
+}
+
+struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp);
+void gfs2_aspace_put(struct inode *aspace);
+
+void gfs2_meta_inval(struct gfs2_glock *gl);
+void gfs2_meta_sync(struct gfs2_glock *gl);
+
+struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno);
+int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno,
+                   int flags, struct buffer_head **bhp);
+int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh);
+
+void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh,
+                         int meta);
+void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
+void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
+                struct gfs2_ail *ai);
+
+void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen);
+
+void gfs2_meta_cache_flush(struct gfs2_inode *ip);
+int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
+                              int new, struct buffer_head **bhp);
+
+static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
+                                         struct buffer_head **bhp)
+{
+        return gfs2_meta_indirect_buffer(ip, 0, ip->i_num.no_addr, 0, bhp);
+}
+
+struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen);
+void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
+
+#define buffer_busy(bh) \
+((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock) | (1ul << BH_Pinned)))
+#define buffer_in_io(bh) \
+((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock)))
+
+#endif /* __DIO_DOT_H__ */
+