Btrfs: Add file data csums back in via hooks in the extent map code
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index e91a2e9..0eae6c4 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -6,12 +6,19 @@
#define EXTENT_MAP_INLINE (u64)-2
#define EXTENT_MAP_DELALLOC (u64)-1
+struct extent_map_ops {
+ int (*fill_delalloc)(struct inode *inode, u64 start, u64 end);
+ int (*writepage_io_hook)(struct page *page, u64 start, u64 end);
+ int (*readpage_io_hook)(struct page *page, u64 start, u64 end);
+ int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end);
+};
+
struct extent_map_tree {
struct rb_root map;
struct rb_root state;
struct address_space *mapping;
rwlock_t lock;
- int (*fill_delalloc)(struct inode *inode, u64 start, u64 end);
+ struct extent_map_ops *ops;
};
/* note, this must start with the same fields as fs/extent_map.c:tree_entry */
@@ -36,6 +43,10 @@
wait_queue_head_t wq;
atomic_t refs;
unsigned long state;
+
+ /* for use by the FS */
+ u64 private;
+
struct list_head list;
};
@@ -89,4 +100,6 @@
struct inode *inode, struct page *page,
unsigned from, unsigned to);
int set_range_dirty(struct extent_map_tree *tree, u64 start, u64 end);
+int set_state_private(struct extent_map_tree *tree, u64 start, u64 private);
+int get_state_private(struct extent_map_tree *tree, u64 start, u64 *private);
#endif