Btrfs: verify csums on read

[deliverable/linux.git] / fs / btrfs / disk-io.h

diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 24a9e77c831176e93d54bc70c85ab1c58309d705..f6998e2192ced1b1314db87d0b79b6867086b682 100644 (file)
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -1,35 +1,44 @@
 #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 *btrfs_find_create_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);
-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);
-int close_ctree(struct btrfs_root *root, struct btrfs_super_block *s);
-void btrfs_block_release(struct btrfs_root *root, struct btrfs_buffer *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)
-
+                    struct btrfs_root *root, struct buffer_head *buf);
+int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
+                            struct btrfs_root *root);
+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 buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr);
+int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len,
+                   char *result);
 #endif