Mountable btrfs, with readdir

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 28 insertions, 23 deletions

diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index d888cf5c350b..7f4bb729b734 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -1,36 +1,41 @@
 #ifndef __DISKIO__
 #define __DISKIO__
-#include "list.h"
 
-struct btrfs_buffer {
-        u64 blocknr;
-        int count;
-        struct list_head dirty;
-        struct list_head cache;
-        union {
-                struct btrfs_node node;
-                struct btrfs_leaf leaf;
-        };
-};
+#include <linux/buffer_head.h>
 
-struct btrfs_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr);
-struct btrfs_buffer *find_tree_block(struct btrfs_root *root, u64 blocknr);
+#define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
+
+static inline struct btrfs_node *btrfs_buffer_node(struct buffer_head *bh)
+{
+        return (struct btrfs_node *)bh->b_data;
+}
+
+static inline struct btrfs_leaf *btrfs_buffer_leaf(struct buffer_head *bh)
+{
+        return (struct btrfs_leaf *)bh->b_data;
+}
+
+static inline struct btrfs_header *btrfs_buffer_header(struct buffer_head *bh)
+{
+        return &((struct btrfs_node *)bh->b_data)->header;
+}
+
+struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr);
+struct buffer_head *find_tree_block(struct btrfs_root *root, u64 blocknr);
 int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-                     struct btrfs_buffer *buf);
+                     struct buffer_head *buf);
 int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-                     struct btrfs_buffer *buf);
+                     struct buffer_head *buf);
 int clean_tree_block(struct btrfs_trans_handle *trans,
-                     struct btrfs_root *root, struct btrfs_buffer *buf);
+                     struct btrfs_root *root, struct buffer_head *buf);
 int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root
                              *root, struct btrfs_super_block *s);
-struct btrfs_root *open_ctree(char *filename, struct btrfs_super_block *s);
-struct btrfs_root *open_ctree_fd(int fp, struct btrfs_super_block *super);
-int close_ctree(struct btrfs_root *root, struct btrfs_super_block *s);
-void btrfs_block_release(struct btrfs_root *root, struct btrfs_buffer *buf);
+struct btrfs_root *open_ctree(struct super_block *sb,
+                              struct buffer_head *sb_buffer,
+                              struct btrfs_super_block *disk_super);
+int close_ctree(struct btrfs_root *root);
+void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf);
 int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root *root,
                       struct btrfs_super_block *s);
 int mkfs(int fd, u64 num_blocks, u32 blocksize);
-
-#define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
-
 #endif