[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_DO_ACCOUNTING (1 << 11)
#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
#define EXTENT_CLEAR_ACCOUNTING  0x80

/*
 * 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 unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
			 struct extent_state **cached, 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,
			struct extent_state **cached_state, 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,
				struct extent_state **cached_state);
int extent_buffer_uptodate(struct extent_io_tree *tree,
			   struct extent_buffer *eb,
			   struct extent_state *cached_state);
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)
32c00aff	18	#define EXTENT_DO_ACCOUNTING (1 << 11)
d1310b2e CM	19	#define EXTENT_IOBITS (EXTENT_LOCKED \| EXTENT_WRITEBACK)
d1310b2e CM	20
c8b97818 CM	21	/* flags for bio submission */
	22	#define EXTENT_BIO_COMPRESSED 1
	23
b4ce94de CM	24	/* these are bit numbers for test/set bit */
	25	#define EXTENT_BUFFER_UPTODATE 0
	26	#define EXTENT_BUFFER_BLOCKING 1
b9473439	27	#define EXTENT_BUFFER_DIRTY 2
b4ce94de	28
a791e35e CM	29	/* these are flags for extent_clear_unlock_delalloc */
	30	#define EXTENT_CLEAR_UNLOCK_PAGE 0x1
	31	#define EXTENT_CLEAR_UNLOCK 0x2
	32	#define EXTENT_CLEAR_DELALLOC 0x4
	33	#define EXTENT_CLEAR_DIRTY 0x8
	34	#define EXTENT_SET_WRITEBACK 0x10
	35	#define EXTENT_END_WRITEBACK 0x20
	36	#define EXTENT_SET_PRIVATE2 0x40
32c00aff	37	#define EXTENT_CLEAR_ACCOUNTING 0x80
a791e35e	38
d1310b2e CM	39	/*
	40	* page->private values. Every page that is controlled by the extent
	41	* map has page->private set to one.
	42	*/
	43	#define EXTENT_PAGE_PRIVATE 1
	44	#define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3
	45
70dec807 CM	46	struct extent_state;
70dec807 CM	47
44b8bd7e	48	typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
c8b97818 CM	49	struct bio *bio, int mirror_num,
c8b97818 CM	50	unsigned long bio_flags);
d1310b2e	51	struct extent_io_ops {
c8b97818	52	int (fill_delalloc)(struct inode inode, struct page *locked_page,
771ed689 CM	53	u64 start, u64 end, int *page_started,
771ed689 CM	54	unsigned long *nr_written);
247e743c	55	int (writepage_start_hook)(struct page page, u64 start, u64 end);
d1310b2e	56	int (writepage_io_hook)(struct page page, u64 start, u64 end);
44b8bd7e	57	extent_submit_bio_hook_t *submit_bio_hook;
239b14b3	58	int (merge_bio_hook)(struct page page, unsigned long offset,
c8b97818 CM	59	size_t size, struct bio *bio,
c8b97818 CM	60	unsigned long bio_flags);
d1310b2e	61	int (readpage_io_hook)(struct page page, u64 start, u64 end);
7e38326f CM	62	int (readpage_io_failed_hook)(struct bio bio, struct page *page,
	63	u64 start, u64 end,
	64	struct extent_state *state);
1259ab75 CM	65	int (writepage_io_failed_hook)(struct bio bio, struct page *page,
	66	u64 start, u64 end,
	67	struct extent_state *state);
70dec807 CM	68	int (readpage_end_io_hook)(struct page page, u64 start, u64 end,
70dec807 CM	69	struct extent_state *state);
1259ab75	70	int (writepage_end_io_hook)(struct page page, u64 start, u64 end,
e6dcd2dc	71	struct extent_state *state, int uptodate);
291d673e	72	int (set_bit_hook)(struct inode inode, u64 start, u64 end,
b0c68f8b	73	unsigned long old, unsigned long bits);
9ed74f2d JB	74	int (clear_bit_hook)(struct inode inode, struct extent_state *state,
	75	unsigned long bits);
	76	int (merge_extent_hook)(struct inode inode,
	77	struct extent_state *new,
	78	struct extent_state *other);
	79	int (split_extent_hook)(struct inode inode,
	80	struct extent_state *orig, u64 split);
4bef0848	81	int (write_cache_pages_lock_hook)(struct page page);
d1310b2e CM	82	};
	83
	84	struct extent_io_tree {
	85	struct rb_root state;
6af118ce	86	struct rb_root buffer;
d1310b2e CM	87	struct address_space *mapping;
d1310b2e CM	88	u64 dirty_bytes;
70dec807	89	spinlock_t lock;
6af118ce	90	spinlock_t buffer_lock;
d1310b2e	91	struct extent_io_ops *ops;
d1310b2e CM	92	};
	93
	94	struct extent_state {
	95	u64 start;
	96	u64 end; /* inclusive */
d1310b2e	97	struct rb_node rb_node;
9ed74f2d JB	98
9ed74f2d JB	99	/* ADD NEW ELEMENTS AFTER THIS */
70dec807	100	struct extent_io_tree *tree;
d1310b2e CM	101	wait_queue_head_t wq;
	102	atomic_t refs;
	103	unsigned long state;
9ed74f2d JB	104	u64 split_start;
9ed74f2d JB	105	u64 split_end;
d1310b2e CM	106
	107	/* for use by the FS */
	108	u64 private;
	109
2d2ae547	110	struct list_head leak_list;
d1310b2e CM	111	};
	112
	113	struct extent_buffer {
	114	u64 start;
	115	unsigned long len;
	116	char *map_token;
	117	char *kaddr;
	118	unsigned long map_start;
	119	unsigned long map_len;
	120	struct page *first_page;
b4ce94de	121	unsigned long bflags;
d1310b2e	122	atomic_t refs;
2d2ae547	123	struct list_head leak_list;
6af118ce	124	struct rb_node rb_node;
b4ce94de CM	125
	126	/* the spinlock is used to protect most operations */
	127	spinlock_t lock;
	128
	129	/*
	130	* when we keep the lock held while blocking, waiters go onto
	131	* the wq
	132	*/
	133	wait_queue_head_t lock_wq;
d1310b2e CM	134	};
	135
	136	struct extent_map_tree;
	137
d7fc640e CM	138	static inline struct extent_state extent_state_next(struct extent_state state)
	139	{
	140	struct rb_node *node;
	141	node = rb_next(&state->rb_node);
	142	if (!node)
	143	return NULL;
	144	return rb_entry(node, struct extent_state, rb_node);
	145	}
	146
d1310b2e CM	147	typedef struct extent_map (get_extent_t)(struct inode inode,
	148	struct page *page,
	149	size_t page_offset,
	150	u64 start, u64 len,
	151	int create);
	152
	153	void extent_io_tree_init(struct extent_io_tree *tree,
	154	struct address_space *mapping, gfp_t mask);
d1310b2e	155	int try_release_extent_mapping(struct extent_map_tree *map,
70dec807 CM	156	struct extent_io_tree tree, struct page page,
70dec807 CM	157	gfp_t mask);
6af118ce	158	int try_release_extent_buffer(struct extent_io_tree tree, struct page page);
7b13b7b1 CM	159	int try_release_extent_state(struct extent_map_tree *map,
	160	struct extent_io_tree tree, struct page page,
	161	gfp_t mask);
d1310b2e	162	int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
1edbb734	163	int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
2c64c53d	164	int bits, struct extent_state **cached, gfp_t mask);
d1310b2e	165	int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
2ac55d41 JB	166	int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
2ac55d41 JB	167	struct extent_state **cached, gfp_t mask);
25179201 JB	168	int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
25179201 JB	169	gfp_t mask);
d1310b2e CM	170	int extent_read_full_page(struct extent_io_tree tree, struct page page,
	171	get_extent_t *get_extent);
	172	int __init extent_io_init(void);
	173	void extent_io_exit(void);
	174
	175	u64 count_range_bits(struct extent_io_tree *tree,
	176	u64 *start, u64 search_end,
	177	u64 max_bytes, unsigned long bits);
	178
	179	int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
9655d298	180	int bits, int filled, struct extent_state *cached_state);
d1310b2e CM	181	int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
d1310b2e CM	182	int bits, gfp_t mask);
e6dcd2dc	183	int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
2c64c53d CM	184	int bits, int wake, int delete, struct extent_state **cached,
2c64c53d CM	185	gfp_t mask);
d1310b2e CM	186	int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
	187	int bits, gfp_t mask);
	188	int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
	189	gfp_t mask);
	190	int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
	191	gfp_t mask);
	192	int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
	193	gfp_t mask);
	194	int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
	195	gfp_t mask);
e6dcd2dc CM	196	int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
	197	gfp_t mask);
	198	int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start,
	199	u64 end, gfp_t mask);
d1310b2e	200	int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
2ac55d41	201	struct extent_state **cached_state, gfp_t mask);
e6dcd2dc CM	202	int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
e6dcd2dc CM	203	gfp_t mask);
d1310b2e CM	204	int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
d1310b2e CM	205	u64 start_ret, u64 end_ret, int bits);
d7fc640e CM	206	struct extent_state find_first_extent_bit_state(struct extent_io_tree tree,
d7fc640e CM	207	u64 start, int bits);
d1310b2e CM	208	int extent_invalidatepage(struct extent_io_tree *tree,
	209	struct page *page, unsigned long offset);
	210	int extent_write_full_page(struct extent_io_tree tree, struct page page,
	211	get_extent_t *get_extent,
	212	struct writeback_control *wbc);
771ed689 CM	213	int extent_write_locked_range(struct extent_io_tree tree, struct inode inode,
	214	u64 start, u64 end, get_extent_t *get_extent,
	215	int mode);
d1310b2e CM	216	int extent_writepages(struct extent_io_tree *tree,
	217	struct address_space *mapping,
	218	get_extent_t *get_extent,
	219	struct writeback_control *wbc);
	220	int extent_readpages(struct extent_io_tree *tree,
	221	struct address_space *mapping,
	222	struct list_head *pages, unsigned nr_pages,
	223	get_extent_t get_extent);
	224	int extent_prepare_write(struct extent_io_tree *tree,
	225	struct inode inode, struct page page,
	226	unsigned from, unsigned to, get_extent_t *get_extent);
	227	int extent_commit_write(struct extent_io_tree *tree,
	228	struct inode inode, struct page page,
	229	unsigned from, unsigned to);
	230	sector_t extent_bmap(struct address_space *mapping, sector_t iblock,
	231	get_extent_t *get_extent);
1506fcc8 YS	232	int extent_fiemap(struct inode inode, struct fiemap_extent_info fieinfo,
1506fcc8 YS	233	__u64 start, __u64 len, get_extent_t *get_extent);
d1310b2e CM	234	int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end);
	235	int set_state_private(struct extent_io_tree *tree, u64 start, u64 private);
	236	int get_state_private(struct extent_io_tree tree, u64 start, u64 private);
	237	void set_page_extent_mapped(struct page *page);
	238
	239	struct extent_buffer alloc_extent_buffer(struct extent_io_tree tree,
	240	u64 start, unsigned long len,
	241	struct page *page0,
	242	gfp_t mask);
	243	struct extent_buffer find_extent_buffer(struct extent_io_tree tree,
	244	u64 start, unsigned long len,
	245	gfp_t mask);
	246	void free_extent_buffer(struct extent_buffer *eb);
	247	int read_extent_buffer_pages(struct extent_io_tree *tree,
a86c12c7	248	struct extent_buffer *eb, u64 start, int wait,
f188591e	249	get_extent_t *get_extent, int mirror_num);
d1310b2e CM	250
	251	static inline void extent_buffer_get(struct extent_buffer *eb)
	252	{
	253	atomic_inc(&eb->refs);
	254	}
	255
	256	int memcmp_extent_buffer(struct extent_buffer eb, const void ptrv,
	257	unsigned long start,
	258	unsigned long len);
	259	void read_extent_buffer(struct extent_buffer eb, void dst,
	260	unsigned long start,
	261	unsigned long len);
	262	void write_extent_buffer(struct extent_buffer eb, const void src,
	263	unsigned long start, unsigned long len);
	264	void copy_extent_buffer(struct extent_buffer dst, struct extent_buffer src,
	265	unsigned long dst_offset, unsigned long src_offset,
	266	unsigned long len);
	267	void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
	268	unsigned long src_offset, unsigned long len);
	269	void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
	270	unsigned long src_offset, unsigned long len);
	271	void memset_extent_buffer(struct extent_buffer *eb, char c,
	272	unsigned long start, unsigned long len);
	273	int wait_on_extent_buffer_writeback(struct extent_io_tree *tree,
	274	struct extent_buffer *eb);
e6dcd2dc CM	275	int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end);
e6dcd2dc CM	276	int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
d1310b2e CM	277	int clear_extent_buffer_dirty(struct extent_io_tree *tree,
	278	struct extent_buffer *eb);
	279	int set_extent_buffer_dirty(struct extent_io_tree *tree,
	280	struct extent_buffer *eb);
b9473439 CM	281	int test_extent_buffer_dirty(struct extent_io_tree *tree,
b9473439 CM	282	struct extent_buffer *eb);
d1310b2e CM	283	int set_extent_buffer_uptodate(struct extent_io_tree *tree,
d1310b2e CM	284	struct extent_buffer *eb);
1259ab75	285	int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
2ac55d41 JB	286	struct extent_buffer *eb,
2ac55d41 JB	287	struct extent_state **cached_state);
d1310b2e	288	int extent_buffer_uptodate(struct extent_io_tree *tree,
2ac55d41 JB	289	struct extent_buffer *eb,
2ac55d41 JB	290	struct extent_state *cached_state);
d1310b2e CM	291	int map_extent_buffer(struct extent_buffer *eb, unsigned long offset,
	292	unsigned long min_len, char token, char map,
	293	unsigned long *map_start,
	294	unsigned long *map_len, int km);
	295	int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
	296	unsigned long min_len, char token, char map,
	297	unsigned long *map_start,
	298	unsigned long *map_len, int km);
	299	void unmap_extent_buffer(struct extent_buffer eb, char token, int km);
ce9adaa5 CM	300	int release_extent_buffer_tail_pages(struct extent_buffer *eb);
	301	int extent_range_uptodate(struct extent_io_tree *tree,
	302	u64 start, u64 end);
c8b97818 CM	303	int extent_clear_unlock_delalloc(struct inode *inode,
	304	struct extent_io_tree *tree,
	305	u64 start, u64 end, struct page *locked_page,
a791e35e	306	unsigned long op);
d1310b2e	307	#endif