unsigned long flags;
struct block_device *bdev;
atomic_t refs;
- unsigned int in_tree;
unsigned int compress_type;
struct list_head list;
};
rwlock_t lock;
};
+static inline int extent_map_in_tree(const struct extent_map *em)
+{
+ return !RB_EMPTY_NODE(&em->rb_node);
+}
+
static inline u64 extent_map_end(struct extent_map *em)
{
if (em->start + em->len < em->start)
int add_extent_mapping(struct extent_map_tree *tree,
struct extent_map *em, int modified);
int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
+void replace_extent_mapping(struct extent_map_tree *tree,
+ struct extent_map *cur,
+ struct extent_map *new,
+ int modified);
struct extent_map *alloc_extent_map(void);
void free_extent_map(struct extent_map *em);