Btrfs: Add support for online device removal

[safe/jmp/linux-2.6] / fs / btrfs / extent_io.h

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 8b5319d..e483461 100644 (file)
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -13,7 +13,6 @@
 #define EXTENT_DEFRAG (1 << 6)
 #define EXTENT_DEFRAG_DONE (1 << 7)
 #define EXTENT_BUFFER_FILLED (1 << 8)
-#define EXTENT_CSUM (1 << 9)
 #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
 
 /*
@@ -25,13 +24,18 @@
 
 struct extent_state;
 
+typedef        int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
+                                      struct bio *bio, int mirror_num);
 struct extent_io_ops {
        int (*fill_delalloc)(struct inode *inode, u64 start, u64 end);
        int (*writepage_io_hook)(struct page *page, u64 start, u64 end);
-       int (*submit_bio_hook)(struct inode *inode, int rw, struct bio *bio);
+       extent_submit_bio_hook_t *submit_bio_hook;
        int (*merge_bio_hook)(struct page *page, unsigned long offset,
                              size_t size, struct bio *bio);
        int (*readpage_io_hook)(struct page *page, u64 start, u64 end);
+       int (*readpage_io_failed_hook)(struct bio *bio, struct page *page,
+                                      u64 start, u64 end,
+                                      struct extent_state *state);
        int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end,
                                    struct extent_state *state);
        void (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
@@ -66,7 +70,7 @@ struct extent_state {
        /* for use by the FS */
        u64 private;
 
-       struct list_head list;
+       struct list_head leak_list;
 };
 
 struct extent_buffer {
@@ -80,6 +84,7 @@ struct extent_buffer {
        struct list_head lru;
        atomic_t refs;
        int flags;
+       struct list_head leak_list;
 };
 
 struct extent_map_tree;
@@ -105,6 +110,9 @@ void extent_io_tree_empty_lru(struct extent_io_tree *tree);
 int try_release_extent_mapping(struct extent_map_tree *map,
                               struct extent_io_tree *tree, struct page *page,
                               gfp_t mask);
+int try_release_extent_state(struct extent_map_tree *map,
+                            struct extent_io_tree *tree, struct page *page,
+                            gfp_t mask);
 int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
 int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
 int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
@@ -172,7 +180,7 @@ struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree,
 void free_extent_buffer(struct extent_buffer *eb);
 int read_extent_buffer_pages(struct extent_io_tree *tree,
                             struct extent_buffer *eb, u64 start, int wait,
-                            get_extent_t *get_extent);
+                            get_extent_t *get_extent, int mirror_num);
 
 static inline void extent_buffer_get(struct extent_buffer *eb)
 {
@@ -215,4 +223,9 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
                      unsigned long *map_start,
                      unsigned long *map_len, int km);
 void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km);
+int invalidate_extent_lru(struct extent_io_tree *tree, u64 start,
+                         unsigned long len);
+int release_extent_buffer_tail_pages(struct extent_buffer *eb);
+int extent_range_uptodate(struct extent_io_tree *tree,
+                         u64 start, u64 end);
 #endif