[net-next-2.6.git] / fs / btrfs / extent_io.h

#ifndef __EXTENTIO__
#define __EXTENTIO__

#include <linux/rbtree.h>

/* bits for the extent state */
#define EXTENT_DIRTY 1
#define EXTENT_WRITEBACK (1 << 1)
#define EXTENT_UPTODATE (1 << 2)
#define EXTENT_LOCKED (1 << 3)
#define EXTENT_NEW (1 << 4)
#define EXTENT_DELALLOC (1 << 5)
#define EXTENT_DEFRAG (1 << 6)
#define EXTENT_DEFRAG_DONE (1 << 7)
#define EXTENT_BUFFER_FILLED (1 << 8)
#define EXTENT_ORDERED (1 << 9)
#define EXTENT_ORDERED_METADATA (1 << 10)
#define EXTENT_BOUNDARY (1 << 11)
#define EXTENT_NODATASUM (1 << 12)
#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)

/* flags for bio submission */
#define EXTENT_BIO_COMPRESSED 1

/*
 * 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_state;

typedef	int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
				       struct bio *bio, int mirror_num,
				       unsigned long bio_flags);
struct extent_io_ops {
	int (*fill_delalloc)(struct inode *inode, struct page *locked_page,
			     u64 start, u64 end, int *page_started,
			     unsigned long *nr_written);
	int (*writepage_start_hook)(struct page *page, u64 start, u64 end);
	int (*writepage_io_hook)(struct page *page, u64 start, u64 end);
	extent_submit_bio_hook_t *submit_bio_hook;
	int (*merge_bio_hook)(struct page *page, unsigned long offset,
			      size_t size, struct bio *bio,
			      unsigned long bio_flags);
	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 (*writepage_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);
	int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
				      struct extent_state *state, int uptodate);
	int (*set_bit_hook)(struct inode *inode, u64 start, u64 end,
			    unsigned long old, unsigned long bits);
	int (*clear_bit_hook)(struct inode *inode, u64 start, u64 end,
			    unsigned long old, unsigned long bits);
	int (*write_cache_pages_lock_hook)(struct page *page);
};

struct extent_io_tree {
	struct rb_root state;
	struct rb_root buffer;
	struct address_space *mapping;
	u64 dirty_bytes;
	spinlock_t lock;
	spinlock_t buffer_lock;
	struct extent_io_ops *ops;
};

struct extent_state {
	u64 start;
	u64 end; /* inclusive */
	struct rb_node rb_node;
	struct extent_io_tree *tree;
	wait_queue_head_t wq;
	atomic_t refs;
	unsigned long state;

	/* for use by the FS */
	u64 private;

	struct list_head leak_list;
};

struct extent_buffer {
	u64 start;
	unsigned long len;
	char *map_token;
	char *kaddr;
	unsigned long map_start;
	unsigned long map_len;
	struct page *first_page;
	atomic_t refs;
	int flags;
	struct list_head leak_list;
	struct rb_node rb_node;
	struct mutex mutex;
};

struct extent_map_tree;

static inline struct extent_state *extent_state_next(struct extent_state *state)
{
	struct rb_node *node;
	node = rb_next(&state->rb_node);
	if (!node)
		return NULL;
	return rb_entry(node, struct extent_state, rb_node);
}

typedef struct extent_map *(get_extent_t)(struct inode *inode,
					  struct page *page,
					  size_t page_offset,
					  u64 start, u64 len,
					  int create);

void extent_io_tree_init(struct extent_io_tree *tree,
			  struct address_space *mapping, gfp_t mask);
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_buffer(struct extent_io_tree *tree, struct page *page);
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 try_lock_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,
			  get_extent_t *get_extent);
int __init extent_io_init(void);
void extent_io_exit(void);

u64 count_range_bits(struct extent_io_tree *tree,
		     u64 *start, u64 search_end,
		     u64 max_bytes, unsigned long bits);

int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
		   int bits, int filled);
int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
		      int bits, gfp_t mask);
int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
		     int bits, int wake, int delete, gfp_t mask);
int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
		    int bits, gfp_t mask);
int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
			gfp_t mask);
int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
		   gfp_t mask);
int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
		     gfp_t mask);
int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
		       gfp_t mask);
int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
		       gfp_t mask);
int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start,
				  u64 end, gfp_t mask);
int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
		     gfp_t mask);
int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
		     gfp_t mask);
int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
			  u64 *start_ret, u64 *end_ret, int bits);
struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree,
						 u64 start, int bits);
int extent_invalidatepage(struct extent_io_tree *tree,
			  struct page *page, unsigned long offset);
int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
			  get_extent_t *get_extent,
			  struct writeback_control *wbc);
int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode,
			      u64 start, u64 end, get_extent_t *get_extent,
			      int mode);
int extent_writepages(struct extent_io_tree *tree,
		      struct address_space *mapping,
		      get_extent_t *get_extent,
		      struct writeback_control *wbc);
int extent_readpages(struct extent_io_tree *tree,
		     struct address_space *mapping,
		     struct list_head *pages, unsigned nr_pages,
		     get_extent_t get_extent);
int extent_prepare_write(struct extent_io_tree *tree,
			 struct inode *inode, struct page *page,
			 unsigned from, unsigned to, get_extent_t *get_extent);
int extent_commit_write(struct extent_io_tree *tree,
			struct inode *inode, struct page *page,
			unsigned from, unsigned to);
sector_t extent_bmap(struct address_space *mapping, sector_t iblock,
		get_extent_t *get_extent);
int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
		__u64 start, __u64 len, get_extent_t *get_extent);
int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end);
int set_state_private(struct extent_io_tree *tree, u64 start, u64 private);
int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
void set_page_extent_mapped(struct page *page);

struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree,
					  u64 start, unsigned long len,
					  struct page *page0,
					  gfp_t mask);
struct extent_buffer *find_extent_buffer(struct extent_io_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_io_tree *tree,
			     struct extent_buffer *eb, u64 start, int wait,
			     get_extent_t *get_extent, int mirror_num);

static inline void extent_buffer_get(struct extent_buffer *eb)
{
	atomic_inc(&eb->refs);
}

int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
			  unsigned long start,
			  unsigned long len);
void read_extent_buffer(struct extent_buffer *eb, void *dst,
			unsigned long start,
			unsigned long len);
void write_extent_buffer(struct extent_buffer *eb, const void *src,
			 unsigned long start, unsigned long len);
void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
			unsigned long dst_offset, unsigned long src_offset,
			unsigned long len);
void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
			   unsigned long src_offset, unsigned long len);
void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
			   unsigned long src_offset, unsigned long len);
void memset_extent_buffer(struct extent_buffer *eb, char c,
			  unsigned long start, unsigned long len);
int wait_on_extent_buffer_writeback(struct extent_io_tree *tree,
				    struct extent_buffer *eb);
int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end);
int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
int clear_extent_buffer_dirty(struct extent_io_tree *tree,
			      struct extent_buffer *eb);
int set_extent_buffer_dirty(struct extent_io_tree *tree,
			     struct extent_buffer *eb);
int set_extent_buffer_uptodate(struct extent_io_tree *tree,
			       struct extent_buffer *eb);
int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
				struct extent_buffer *eb);
int extent_buffer_uptodate(struct extent_io_tree *tree,
			   struct extent_buffer *eb);
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);
int release_extent_buffer_tail_pages(struct extent_buffer *eb);
int extent_range_uptodate(struct extent_io_tree *tree,
			  u64 start, u64 end);
int extent_clear_unlock_delalloc(struct inode *inode,
				struct extent_io_tree *tree,
				u64 start, u64 end, struct page *locked_page,
				int unlock_page,
				int clear_unlock,
				int clear_delalloc, int clear_dirty,
				int set_writeback,
				int end_writeback);
#endif
Commit	Line	Data
d1310b2e CM	1	#ifndef __EXTENTIO__
	2	#define __EXTENTIO__
	3
	4	#include <linux/rbtree.h>
	5
	6	/* bits for the extent state */
	7	#define EXTENT_DIRTY 1
	8	#define EXTENT_WRITEBACK (1 << 1)
	9	#define EXTENT_UPTODATE (1 << 2)
	10	#define EXTENT_LOCKED (1 << 3)
	11	#define EXTENT_NEW (1 << 4)
	12	#define EXTENT_DELALLOC (1 << 5)
	13	#define EXTENT_DEFRAG (1 << 6)
	14	#define EXTENT_DEFRAG_DONE (1 << 7)
	15	#define EXTENT_BUFFER_FILLED (1 << 8)
e6dcd2dc CM	16	#define EXTENT_ORDERED (1 << 9)
e6dcd2dc CM	17	#define EXTENT_ORDERED_METADATA (1 << 10)
5b21f2ed	18	#define EXTENT_BOUNDARY (1 << 11)
17d217fe	19	#define EXTENT_NODATASUM (1 << 12)
d1310b2e CM	20	#define EXTENT_IOBITS (EXTENT_LOCKED \| EXTENT_WRITEBACK)
d1310b2e CM	21
c8b97818 CM	22	/* flags for bio submission */
	23	#define EXTENT_BIO_COMPRESSED 1
	24
d1310b2e CM	25	/*
	26	* page->private values. Every page that is controlled by the extent
	27	* map has page->private set to one.
	28	*/
	29	#define EXTENT_PAGE_PRIVATE 1
	30	#define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3
	31
70dec807 CM	32	struct extent_state;
70dec807 CM	33
44b8bd7e	34	typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
c8b97818 CM	35	struct bio *bio, int mirror_num,
c8b97818 CM	36	unsigned long bio_flags);
d1310b2e	37	struct extent_io_ops {
c8b97818	38	int (fill_delalloc)(struct inode inode, struct page *locked_page,
771ed689 CM	39	u64 start, u64 end, int *page_started,
771ed689 CM	40	unsigned long *nr_written);
247e743c	41	int (writepage_start_hook)(struct page page, u64 start, u64 end);
d1310b2e	42	int (writepage_io_hook)(struct page page, u64 start, u64 end);
44b8bd7e	43	extent_submit_bio_hook_t *submit_bio_hook;
239b14b3	44	int (merge_bio_hook)(struct page page, unsigned long offset,
c8b97818 CM	45	size_t size, struct bio *bio,
c8b97818 CM	46	unsigned long bio_flags);
d1310b2e	47	int (readpage_io_hook)(struct page page, u64 start, u64 end);
7e38326f CM	48	int (readpage_io_failed_hook)(struct bio bio, struct page *page,
	49	u64 start, u64 end,
	50	struct extent_state *state);
1259ab75 CM	51	int (writepage_io_failed_hook)(struct bio bio, struct page *page,
	52	u64 start, u64 end,
	53	struct extent_state *state);
70dec807 CM	54	int (readpage_end_io_hook)(struct page page, u64 start, u64 end,
70dec807 CM	55	struct extent_state *state);
1259ab75	56	int (writepage_end_io_hook)(struct page page, u64 start, u64 end,
e6dcd2dc	57	struct extent_state *state, int uptodate);
291d673e	58	int (set_bit_hook)(struct inode inode, u64 start, u64 end,
b0c68f8b	59	unsigned long old, unsigned long bits);
291d673e	60	int (clear_bit_hook)(struct inode inode, u64 start, u64 end,
b0c68f8b	61	unsigned long old, unsigned long bits);
4bef0848	62	int (write_cache_pages_lock_hook)(struct page page);
d1310b2e CM	63	};
	64
	65	struct extent_io_tree {
	66	struct rb_root state;
6af118ce	67	struct rb_root buffer;
d1310b2e CM	68	struct address_space *mapping;
d1310b2e CM	69	u64 dirty_bytes;
70dec807	70	spinlock_t lock;
6af118ce	71	spinlock_t buffer_lock;
d1310b2e	72	struct extent_io_ops *ops;
d1310b2e CM	73	};
	74
	75	struct extent_state {
	76	u64 start;
	77	u64 end; /* inclusive */
d1310b2e	78	struct rb_node rb_node;
70dec807	79	struct extent_io_tree *tree;
d1310b2e CM	80	wait_queue_head_t wq;
	81	atomic_t refs;
	82	unsigned long state;
	83
	84	/* for use by the FS */
	85	u64 private;
	86
2d2ae547	87	struct list_head leak_list;
d1310b2e CM	88	};
	89
	90	struct extent_buffer {
	91	u64 start;
	92	unsigned long len;
	93	char *map_token;
	94	char *kaddr;
	95	unsigned long map_start;
	96	unsigned long map_len;
	97	struct page *first_page;
d1310b2e CM	98	atomic_t refs;
d1310b2e CM	99	int flags;
2d2ae547	100	struct list_head leak_list;
6af118ce	101	struct rb_node rb_node;
a61e6f29	102	struct mutex mutex;
d1310b2e CM	103	};
	104
	105	struct extent_map_tree;
	106
d7fc640e CM	107	static inline struct extent_state extent_state_next(struct extent_state state)
	108	{
	109	struct rb_node *node;
	110	node = rb_next(&state->rb_node);
	111	if (!node)
	112	return NULL;
	113	return rb_entry(node, struct extent_state, rb_node);
	114	}
	115
d1310b2e CM	116	typedef struct extent_map (get_extent_t)(struct inode inode,
	117	struct page *page,
	118	size_t page_offset,
	119	u64 start, u64 len,
	120	int create);
	121
	122	void extent_io_tree_init(struct extent_io_tree *tree,
	123	struct address_space *mapping, gfp_t mask);
d1310b2e	124	int try_release_extent_mapping(struct extent_map_tree *map,
70dec807 CM	125	struct extent_io_tree tree, struct page page,
70dec807 CM	126	gfp_t mask);
6af118ce	127	int try_release_extent_buffer(struct extent_io_tree tree, struct page page);
7b13b7b1 CM	128	int try_release_extent_state(struct extent_map_tree *map,
	129	struct extent_io_tree tree, struct page page,
	130	gfp_t mask);
d1310b2e CM	131	int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
d1310b2e CM	132	int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
25179201 JB	133	int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
25179201 JB	134	gfp_t mask);
d1310b2e CM	135	int extent_read_full_page(struct extent_io_tree tree, struct page page,
	136	get_extent_t *get_extent);
	137	int __init extent_io_init(void);
	138	void extent_io_exit(void);
	139
	140	u64 count_range_bits(struct extent_io_tree *tree,
	141	u64 *start, u64 search_end,
	142	u64 max_bytes, unsigned long bits);
	143
	144	int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
	145	int bits, int filled);
	146	int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
	147	int bits, gfp_t mask);
e6dcd2dc CM	148	int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
e6dcd2dc CM	149	int bits, int wake, int delete, gfp_t mask);
d1310b2e CM	150	int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
	151	int bits, gfp_t mask);
	152	int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
	153	gfp_t mask);
	154	int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
	155	gfp_t mask);
	156	int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
	157	gfp_t mask);
	158	int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
	159	gfp_t mask);
e6dcd2dc CM	160	int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
	161	gfp_t mask);
	162	int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start,
	163	u64 end, gfp_t mask);
d1310b2e CM	164	int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
d1310b2e CM	165	gfp_t mask);
e6dcd2dc CM	166	int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
e6dcd2dc CM	167	gfp_t mask);
d1310b2e CM	168	int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
d1310b2e CM	169	u64 start_ret, u64 end_ret, int bits);
d7fc640e CM	170	struct extent_state find_first_extent_bit_state(struct extent_io_tree tree,
d7fc640e CM	171	u64 start, int bits);
d1310b2e CM	172	int extent_invalidatepage(struct extent_io_tree *tree,
	173	struct page *page, unsigned long offset);
	174	int extent_write_full_page(struct extent_io_tree tree, struct page page,
	175	get_extent_t *get_extent,
	176	struct writeback_control *wbc);
771ed689 CM	177	int extent_write_locked_range(struct extent_io_tree tree, struct inode inode,
	178	u64 start, u64 end, get_extent_t *get_extent,
	179	int mode);
d1310b2e CM	180	int extent_writepages(struct extent_io_tree *tree,
	181	struct address_space *mapping,
	182	get_extent_t *get_extent,
	183	struct writeback_control *wbc);
	184	int extent_readpages(struct extent_io_tree *tree,
	185	struct address_space *mapping,
	186	struct list_head *pages, unsigned nr_pages,
	187	get_extent_t get_extent);
	188	int extent_prepare_write(struct extent_io_tree *tree,
	189	struct inode inode, struct page page,
	190	unsigned from, unsigned to, get_extent_t *get_extent);
	191	int extent_commit_write(struct extent_io_tree *tree,
	192	struct inode inode, struct page page,
	193	unsigned from, unsigned to);
	194	sector_t extent_bmap(struct address_space *mapping, sector_t iblock,
	195	get_extent_t *get_extent);
1506fcc8 YS	196	int extent_fiemap(struct inode inode, struct fiemap_extent_info fieinfo,
1506fcc8 YS	197	__u64 start, __u64 len, get_extent_t *get_extent);
d1310b2e CM	198	int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end);
	199	int set_state_private(struct extent_io_tree *tree, u64 start, u64 private);
	200	int get_state_private(struct extent_io_tree tree, u64 start, u64 private);
	201	void set_page_extent_mapped(struct page *page);
	202
	203	struct extent_buffer alloc_extent_buffer(struct extent_io_tree tree,
	204	u64 start, unsigned long len,
	205	struct page *page0,
	206	gfp_t mask);
	207	struct extent_buffer find_extent_buffer(struct extent_io_tree tree,
	208	u64 start, unsigned long len,
	209	gfp_t mask);
	210	void free_extent_buffer(struct extent_buffer *eb);
	211	int read_extent_buffer_pages(struct extent_io_tree *tree,
a86c12c7	212	struct extent_buffer *eb, u64 start, int wait,
f188591e	213	get_extent_t *get_extent, int mirror_num);
d1310b2e CM	214
	215	static inline void extent_buffer_get(struct extent_buffer *eb)
	216	{
	217	atomic_inc(&eb->refs);
	218	}
	219
	220	int memcmp_extent_buffer(struct extent_buffer eb, const void ptrv,
	221	unsigned long start,
	222	unsigned long len);
	223	void read_extent_buffer(struct extent_buffer eb, void dst,
	224	unsigned long start,
	225	unsigned long len);
	226	void write_extent_buffer(struct extent_buffer eb, const void src,
	227	unsigned long start, unsigned long len);
	228	void copy_extent_buffer(struct extent_buffer dst, struct extent_buffer src,
	229	unsigned long dst_offset, unsigned long src_offset,
	230	unsigned long len);
	231	void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
	232	unsigned long src_offset, unsigned long len);
	233	void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
	234	unsigned long src_offset, unsigned long len);
	235	void memset_extent_buffer(struct extent_buffer *eb, char c,
	236	unsigned long start, unsigned long len);
	237	int wait_on_extent_buffer_writeback(struct extent_io_tree *tree,
	238	struct extent_buffer *eb);
e6dcd2dc CM	239	int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end);
e6dcd2dc CM	240	int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
d1310b2e CM	241	int clear_extent_buffer_dirty(struct extent_io_tree *tree,
	242	struct extent_buffer *eb);
	243	int set_extent_buffer_dirty(struct extent_io_tree *tree,
	244	struct extent_buffer *eb);
	245	int set_extent_buffer_uptodate(struct extent_io_tree *tree,
	246	struct extent_buffer *eb);
1259ab75 CM	247	int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
1259ab75 CM	248	struct extent_buffer *eb);
d1310b2e CM	249	int extent_buffer_uptodate(struct extent_io_tree *tree,
	250	struct extent_buffer *eb);
	251	int map_extent_buffer(struct extent_buffer *eb, unsigned long offset,
	252	unsigned long min_len, char token, char map,
	253	unsigned long *map_start,
	254	unsigned long *map_len, int km);
	255	int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
	256	unsigned long min_len, char token, char map,
	257	unsigned long *map_start,
	258	unsigned long *map_len, int km);
	259	void unmap_extent_buffer(struct extent_buffer eb, char token, int km);
ce9adaa5 CM	260	int release_extent_buffer_tail_pages(struct extent_buffer *eb);
	261	int extent_range_uptodate(struct extent_io_tree *tree,
	262	u64 start, u64 end);
c8b97818 CM	263	int extent_clear_unlock_delalloc(struct inode *inode,
	264	struct extent_io_tree *tree,
	265	u64 start, u64 end, struct page *locked_page,
771ed689 CM	266	int unlock_page,
	267	int clear_unlock,
	268	int clear_delalloc, int clear_dirty,
	269	int set_writeback,
	270	int end_writeback);
d1310b2e	271	#endif