diff options
| author | Chris Mason <chris.mason@oracle.com> | 2007-10-15 16:19:22 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:03:56 -0400 |
| commit | 19c00ddcc31ad4bdfb86b57085e06d6135b9b1d7 (patch) | |
| tree | a48cbaac47070057912c1b35d270b61b7e14386c /fs/btrfs/extent_map.h | |
| parent | 0f82731fc56448c2733f58e1f5db6c2cbfc90652 (diff) | |
Btrfs: Add back metadata checksumming
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_map.h')
| -rw-r--r-- | fs/btrfs/extent_map.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index f1dc28d260e..39d78d31b6a 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -17,8 +17,17 @@ #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) +/* + * page->private values. Every page that is controlled by the extent + * map has page->private set to one. + */ + +#define EXTENT_PAGE_PRIVATE 1 +#define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 + struct extent_map_ops { int (*fill_delalloc)(struct inode *inode, u64 start, u64 end); @@ -89,7 +98,7 @@ typedef struct extent_map *(get_extent_t)(struct inode *inode, void extent_map_tree_init(struct extent_map_tree *tree, struct address_space *mapping, gfp_t mask); -void extent_map_tree_cleanup(struct extent_map_tree *tree); +void extent_map_tree_empty_lru(struct extent_map_tree *tree); struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree, u64 start, u64 end); int add_extent_mapping(struct extent_map_tree *tree, @@ -143,13 +152,14 @@ void set_page_extent_mapped(struct page *page); struct extent_buffer *alloc_extent_buffer(struct extent_map_tree *tree, u64 start, unsigned long len, + struct page *page0, gfp_t mask); struct extent_buffer *find_extent_buffer(struct extent_map_tree *tree, u64 start, unsigned long len, gfp_t mask); void free_extent_buffer(struct extent_buffer *eb); int read_extent_buffer_pages(struct extent_map_tree *tree, - struct extent_buffer *eb, int wait); + struct extent_buffer *eb, u64 start, int wait); static inline void extent_buffer_get(struct extent_buffer *eb) { @@ -187,5 +197,9 @@ int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, unsigned long min_len, char **token, char **map, unsigned long *map_start, unsigned long *map_len, int km); +int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, + unsigned long min_len, char **token, char **map, + unsigned long *map_start, + unsigned long *map_len, int km); void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); #endif |