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-rw-r--r--fs/btrfs/extent_io.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 151fdada4dc4..fcc4bb078c24 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -81,6 +81,15 @@ struct extent_buffer {
81 81
82struct extent_map_tree; 82struct extent_map_tree;
83 83
84static inline struct extent_state *extent_state_next(struct extent_state *state)
85{
86 struct rb_node *node;
87 node = rb_next(&state->rb_node);
88 if (!node)
89 return NULL;
90 return rb_entry(node, struct extent_state, rb_node);
91}
92
84typedef struct extent_map *(get_extent_t)(struct inode *inode, 93typedef struct extent_map *(get_extent_t)(struct inode *inode,
85 struct page *page, 94 struct page *page,
86 size_t page_offset, 95 size_t page_offset,
@@ -122,6 +131,8 @@ int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
122 gfp_t mask); 131 gfp_t mask);
123int find_first_extent_bit(struct extent_io_tree *tree, u64 start, 132int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
124 u64 *start_ret, u64 *end_ret, int bits); 133 u64 *start_ret, u64 *end_ret, int bits);
134struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree,
135 u64 start, int bits);
125int extent_invalidatepage(struct extent_io_tree *tree, 136int extent_invalidatepage(struct extent_io_tree *tree,
126 struct page *page, unsigned long offset); 137 struct page *page, unsigned long offset);
127int extent_write_full_page(struct extent_io_tree *tree, struct page *page, 138int extent_write_full_page(struct extent_io_tree *tree, struct page *page,