[deliverable/linux.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_BOUNDARY (1 << 9)
#define EXTENT_NODATASUM (1 << 10)
#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)

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

/* these are bit numbers for test/set bit */
#define EXTENT_BUFFER_UPTODATE 0
#define EXTENT_BUFFER_BLOCKING 1
#define EXTENT_BUFFER_DIRTY 2

/* these are flags for extent_clear_unlock_delalloc */
#define EXTENT_CLEAR_UNLOCK_PAGE 0x1
#define EXTENT_CLEAR_UNLOCK	 0x2
#define EXTENT_CLEAR_DELALLOC	 0x4
#define EXTENT_CLEAR_DIRTY	 0x8
#define EXTENT_SET_WRITEBACK	 0x10
#define EXTENT_END_WRITEBACK	 0x20
#define EXTENT_SET_PRIVATE2	 0x40

/*
 * 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, struct extent_state *state,
			      unsigned long bits);
	int (*merge_extent_hook)(struct inode *inode,
				 struct extent_state *new,
				 struct extent_state *other);
	int (*split_extent_hook)(struct inode *inode,
				 struct extent_state *orig, u64 split);
	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;

	/* ADD NEW ELEMENTS AFTER THIS */
	struct extent_io_tree *tree;
	wait_queue_head_t wq;
	atomic_t refs;
	unsigned long state;
	u64 split_start;
	u64 split_end;

	/* 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;
	unsigned long bflags;
	atomic_t refs;
	struct list_head leak_list;
	struct rb_node rb_node;

	/* the spinlock is used to protect most operations */
	spinlock_t lock;

	/*
	 * when we keep the lock held while blocking, waiters go onto
	 * the wq
	 */
	wait_queue_head_t lock_wq;
};

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 lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
		     int bits, struct extent_state **cached, 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, struct extent_state *cached_state);
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, struct extent_state **cached,
		     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 test_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,
				unsigned long op);
#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)
8b62b72b CM	16	#define EXTENT_BOUNDARY (1 << 9)
8b62b72b CM	17	#define EXTENT_NODATASUM (1 << 10)
d1310b2e CM	18	#define EXTENT_IOBITS (EXTENT_LOCKED \| EXTENT_WRITEBACK)
d1310b2e CM	19
c8b97818 CM	20	/* flags for bio submission */
	21	#define EXTENT_BIO_COMPRESSED 1
	22
b4ce94de CM	23	/* these are bit numbers for test/set bit */
	24	#define EXTENT_BUFFER_UPTODATE 0
	25	#define EXTENT_BUFFER_BLOCKING 1
b9473439	26	#define EXTENT_BUFFER_DIRTY 2
b4ce94de	27
a791e35e CM	28	/* these are flags for extent_clear_unlock_delalloc */
	29	#define EXTENT_CLEAR_UNLOCK_PAGE 0x1
	30	#define EXTENT_CLEAR_UNLOCK 0x2
	31	#define EXTENT_CLEAR_DELALLOC 0x4
	32	#define EXTENT_CLEAR_DIRTY 0x8
	33	#define EXTENT_SET_WRITEBACK 0x10
	34	#define EXTENT_END_WRITEBACK 0x20
	35	#define EXTENT_SET_PRIVATE2 0x40
	36
d1310b2e CM	37	/*
	38	* page->private values. Every page that is controlled by the extent
	39	* map has page->private set to one.
	40	*/
	41	#define EXTENT_PAGE_PRIVATE 1
	42	#define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3
	43
70dec807 CM	44	struct extent_state;
70dec807 CM	45
44b8bd7e	46	typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
c8b97818 CM	47	struct bio *bio, int mirror_num,
c8b97818 CM	48	unsigned long bio_flags);
d1310b2e	49	struct extent_io_ops {
c8b97818	50	int (fill_delalloc)(struct inode inode, struct page *locked_page,
771ed689 CM	51	u64 start, u64 end, int *page_started,
771ed689 CM	52	unsigned long *nr_written);
247e743c	53	int (writepage_start_hook)(struct page page, u64 start, u64 end);
d1310b2e	54	int (writepage_io_hook)(struct page page, u64 start, u64 end);
44b8bd7e	55	extent_submit_bio_hook_t *submit_bio_hook;
239b14b3	56	int (merge_bio_hook)(struct page page, unsigned long offset,
c8b97818 CM	57	size_t size, struct bio *bio,
c8b97818 CM	58	unsigned long bio_flags);
d1310b2e	59	int (readpage_io_hook)(struct page page, u64 start, u64 end);
7e38326f CM	60	int (readpage_io_failed_hook)(struct bio bio, struct page *page,
	61	u64 start, u64 end,
	62	struct extent_state *state);
1259ab75 CM	63	int (writepage_io_failed_hook)(struct bio bio, struct page *page,
	64	u64 start, u64 end,
	65	struct extent_state *state);
70dec807 CM	66	int (readpage_end_io_hook)(struct page page, u64 start, u64 end,
70dec807 CM	67	struct extent_state *state);
1259ab75	68	int (writepage_end_io_hook)(struct page page, u64 start, u64 end,
e6dcd2dc	69	struct extent_state *state, int uptodate);
291d673e	70	int (set_bit_hook)(struct inode inode, u64 start, u64 end,
b0c68f8b	71	unsigned long old, unsigned long bits);
9ed74f2d JB	72	int (clear_bit_hook)(struct inode inode, struct extent_state *state,
	73	unsigned long bits);
	74	int (merge_extent_hook)(struct inode inode,
	75	struct extent_state *new,
	76	struct extent_state *other);
	77	int (split_extent_hook)(struct inode inode,
	78	struct extent_state *orig, u64 split);
4bef0848	79	int (write_cache_pages_lock_hook)(struct page page);
d1310b2e CM	80	};
	81
	82	struct extent_io_tree {
	83	struct rb_root state;
6af118ce	84	struct rb_root buffer;
d1310b2e CM	85	struct address_space *mapping;
d1310b2e CM	86	u64 dirty_bytes;
70dec807	87	spinlock_t lock;
6af118ce	88	spinlock_t buffer_lock;
d1310b2e	89	struct extent_io_ops *ops;
d1310b2e CM	90	};
	91
	92	struct extent_state {
	93	u64 start;
	94	u64 end; /* inclusive */
d1310b2e	95	struct rb_node rb_node;
9ed74f2d JB	96
9ed74f2d JB	97	/* ADD NEW ELEMENTS AFTER THIS */
70dec807	98	struct extent_io_tree *tree;
d1310b2e CM	99	wait_queue_head_t wq;
	100	atomic_t refs;
	101	unsigned long state;
9ed74f2d JB	102	u64 split_start;
9ed74f2d JB	103	u64 split_end;
d1310b2e CM	104
	105	/* for use by the FS */
	106	u64 private;
	107
2d2ae547	108	struct list_head leak_list;
d1310b2e CM	109	};
	110
	111	struct extent_buffer {
	112	u64 start;
	113	unsigned long len;
	114	char *map_token;
	115	char *kaddr;
	116	unsigned long map_start;
	117	unsigned long map_len;
	118	struct page *first_page;
b4ce94de	119	unsigned long bflags;
d1310b2e	120	atomic_t refs;
2d2ae547	121	struct list_head leak_list;
6af118ce	122	struct rb_node rb_node;
b4ce94de CM	123
	124	/* the spinlock is used to protect most operations */
	125	spinlock_t lock;
	126
	127	/*
	128	* when we keep the lock held while blocking, waiters go onto
	129	* the wq
	130	*/
	131	wait_queue_head_t lock_wq;
d1310b2e CM	132	};
	133
	134	struct extent_map_tree;
	135
d7fc640e CM	136	static inline struct extent_state extent_state_next(struct extent_state state)
	137	{
	138	struct rb_node *node;
	139	node = rb_next(&state->rb_node);
	140	if (!node)
	141	return NULL;
	142	return rb_entry(node, struct extent_state, rb_node);
	143	}
	144
d1310b2e CM	145	typedef struct extent_map (get_extent_t)(struct inode inode,
	146	struct page *page,
	147	size_t page_offset,
	148	u64 start, u64 len,
	149	int create);
	150
	151	void extent_io_tree_init(struct extent_io_tree *tree,
	152	struct address_space *mapping, gfp_t mask);
d1310b2e	153	int try_release_extent_mapping(struct extent_map_tree *map,
70dec807 CM	154	struct extent_io_tree tree, struct page page,
70dec807 CM	155	gfp_t mask);
6af118ce	156	int try_release_extent_buffer(struct extent_io_tree tree, struct page page);
7b13b7b1 CM	157	int try_release_extent_state(struct extent_map_tree *map,
	158	struct extent_io_tree tree, struct page page,
	159	gfp_t mask);
d1310b2e	160	int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
1edbb734	161	int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
2c64c53d	162	int bits, struct extent_state **cached, gfp_t mask);
d1310b2e	163	int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
25179201 JB	164	int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
25179201 JB	165	gfp_t mask);
d1310b2e CM	166	int extent_read_full_page(struct extent_io_tree tree, struct page page,
	167	get_extent_t *get_extent);
	168	int __init extent_io_init(void);
	169	void extent_io_exit(void);
	170
	171	u64 count_range_bits(struct extent_io_tree *tree,
	172	u64 *start, u64 search_end,
	173	u64 max_bytes, unsigned long bits);
	174
	175	int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
9655d298	176	int bits, int filled, struct extent_state *cached_state);
d1310b2e CM	177	int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
d1310b2e CM	178	int bits, gfp_t mask);
e6dcd2dc	179	int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
2c64c53d CM	180	int bits, int wake, int delete, struct extent_state **cached,
2c64c53d CM	181	gfp_t mask);
d1310b2e CM	182	int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
	183	int bits, gfp_t mask);
	184	int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
	185	gfp_t mask);
	186	int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
	187	gfp_t mask);
	188	int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
	189	gfp_t mask);
	190	int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
	191	gfp_t mask);
e6dcd2dc CM	192	int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
	193	gfp_t mask);
	194	int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start,
	195	u64 end, gfp_t mask);
d1310b2e CM	196	int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
d1310b2e CM	197	gfp_t mask);
e6dcd2dc CM	198	int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
e6dcd2dc CM	199	gfp_t mask);
d1310b2e CM	200	int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
d1310b2e CM	201	u64 start_ret, u64 end_ret, int bits);
d7fc640e CM	202	struct extent_state find_first_extent_bit_state(struct extent_io_tree tree,
d7fc640e CM	203	u64 start, int bits);
d1310b2e CM	204	int extent_invalidatepage(struct extent_io_tree *tree,
	205	struct page *page, unsigned long offset);
	206	int extent_write_full_page(struct extent_io_tree tree, struct page page,
	207	get_extent_t *get_extent,
	208	struct writeback_control *wbc);
771ed689 CM	209	int extent_write_locked_range(struct extent_io_tree tree, struct inode inode,
	210	u64 start, u64 end, get_extent_t *get_extent,
	211	int mode);
d1310b2e CM	212	int extent_writepages(struct extent_io_tree *tree,
	213	struct address_space *mapping,
	214	get_extent_t *get_extent,
	215	struct writeback_control *wbc);
	216	int extent_readpages(struct extent_io_tree *tree,
	217	struct address_space *mapping,
	218	struct list_head *pages, unsigned nr_pages,
	219	get_extent_t get_extent);
	220	int extent_prepare_write(struct extent_io_tree *tree,
	221	struct inode inode, struct page page,
	222	unsigned from, unsigned to, get_extent_t *get_extent);
	223	int extent_commit_write(struct extent_io_tree *tree,
	224	struct inode inode, struct page page,
	225	unsigned from, unsigned to);
	226	sector_t extent_bmap(struct address_space *mapping, sector_t iblock,
	227	get_extent_t *get_extent);
1506fcc8 YS	228	int extent_fiemap(struct inode inode, struct fiemap_extent_info fieinfo,
1506fcc8 YS	229	__u64 start, __u64 len, get_extent_t *get_extent);
d1310b2e CM	230	int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end);
	231	int set_state_private(struct extent_io_tree *tree, u64 start, u64 private);
	232	int get_state_private(struct extent_io_tree tree, u64 start, u64 private);
	233	void set_page_extent_mapped(struct page *page);
	234
	235	struct extent_buffer alloc_extent_buffer(struct extent_io_tree tree,
	236	u64 start, unsigned long len,
	237	struct page *page0,
	238	gfp_t mask);
	239	struct extent_buffer find_extent_buffer(struct extent_io_tree tree,
	240	u64 start, unsigned long len,
	241	gfp_t mask);
	242	void free_extent_buffer(struct extent_buffer *eb);
	243	int read_extent_buffer_pages(struct extent_io_tree *tree,
a86c12c7	244	struct extent_buffer *eb, u64 start, int wait,
f188591e	245	get_extent_t *get_extent, int mirror_num);
d1310b2e CM	246
	247	static inline void extent_buffer_get(struct extent_buffer *eb)
	248	{
	249	atomic_inc(&eb->refs);
	250	}
	251
	252	int memcmp_extent_buffer(struct extent_buffer eb, const void ptrv,
	253	unsigned long start,
	254	unsigned long len);
	255	void read_extent_buffer(struct extent_buffer eb, void dst,
	256	unsigned long start,
	257	unsigned long len);
	258	void write_extent_buffer(struct extent_buffer eb, const void src,
	259	unsigned long start, unsigned long len);
	260	void copy_extent_buffer(struct extent_buffer dst, struct extent_buffer src,
	261	unsigned long dst_offset, unsigned long src_offset,
	262	unsigned long len);
	263	void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
	264	unsigned long src_offset, unsigned long len);
	265	void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
	266	unsigned long src_offset, unsigned long len);
	267	void memset_extent_buffer(struct extent_buffer *eb, char c,
	268	unsigned long start, unsigned long len);
	269	int wait_on_extent_buffer_writeback(struct extent_io_tree *tree,
	270	struct extent_buffer *eb);
e6dcd2dc CM	271	int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end);
e6dcd2dc CM	272	int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
d1310b2e CM	273	int clear_extent_buffer_dirty(struct extent_io_tree *tree,
	274	struct extent_buffer *eb);
	275	int set_extent_buffer_dirty(struct extent_io_tree *tree,
	276	struct extent_buffer *eb);
b9473439 CM	277	int test_extent_buffer_dirty(struct extent_io_tree *tree,
b9473439 CM	278	struct extent_buffer *eb);
d1310b2e CM	279	int set_extent_buffer_uptodate(struct extent_io_tree *tree,
d1310b2e CM	280	struct extent_buffer *eb);
1259ab75 CM	281	int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
1259ab75 CM	282	struct extent_buffer *eb);
d1310b2e CM	283	int extent_buffer_uptodate(struct extent_io_tree *tree,
	284	struct extent_buffer *eb);
	285	int map_extent_buffer(struct extent_buffer *eb, unsigned long offset,
	286	unsigned long min_len, char token, char map,
	287	unsigned long *map_start,
	288	unsigned long *map_len, int km);
	289	int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
	290	unsigned long min_len, char token, char map,
	291	unsigned long *map_start,
	292	unsigned long *map_len, int km);
	293	void unmap_extent_buffer(struct extent_buffer eb, char token, int km);
ce9adaa5 CM	294	int release_extent_buffer_tail_pages(struct extent_buffer *eb);
	295	int extent_range_uptodate(struct extent_io_tree *tree,
	296	u64 start, u64 end);
c8b97818 CM	297	int extent_clear_unlock_delalloc(struct inode *inode,
	298	struct extent_io_tree *tree,
	299	u64 start, u64 end, struct page *locked_page,
a791e35e	300	unsigned long op);
d1310b2e	301	#endif