[linux-2.6-block.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_FIRST_DELALLOC (1 << 12)
#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC)

/*
 * flags for bio submission. The high bits indicate the compression
 * type for this bio
 */
#define EXTENT_BIO_COMPRESSED 1
#define EXTENT_BIO_FLAG_SHIFT 16

/* 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, u64 bio_offset);
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, struct extent_state *state,
			    int *bits);
	int (*clear_bit_hook)(struct inode *inode, struct extent_state *state,
			      int *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 radix_tree_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 rcu_head rcu_head;

	/* 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;
};

static inline void extent_set_compress_type(unsigned long *bio_flags,
					    int compress_type)
{
	*bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT;
}

static inline int extent_compress_type(unsigned long bio_flags)
{
	return bio_flags >> EXTENT_BIO_FLAG_SHIFT;
}

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);

void free_extent_state(struct extent_state *state);
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_bit(struct extent_io_tree *tree, u64 start, u64 end,
		   int bits, int exclusive_bits, u64 *failed_start,
		   struct extent_state **cached_state, 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);
struct bio *
btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
		gfp_t gfp_flags);
#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)
0ca1f7ce	19	#define EXTENT_FIRST_DELALLOC (1 << 12)
d1310b2e	20	#define EXTENT_IOBITS (EXTENT_LOCKED \| EXTENT_WRITEBACK)
0ca1f7ce	21	#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING \| EXTENT_FIRST_DELALLOC)
d1310b2e	22
261507a0 LZ	23	/*
	24	* flags for bio submission. The high bits indicate the compression
	25	* type for this bio
	26	*/
c8b97818	27	#define EXTENT_BIO_COMPRESSED 1
261507a0	28	#define EXTENT_BIO_FLAG_SHIFT 16
c8b97818	29
b4ce94de CM	30	/* these are bit numbers for test/set bit */
	31	#define EXTENT_BUFFER_UPTODATE 0
	32	#define EXTENT_BUFFER_BLOCKING 1
b9473439	33	#define EXTENT_BUFFER_DIRTY 2
b4ce94de	34
a791e35e CM	35	/* these are flags for extent_clear_unlock_delalloc */
	36	#define EXTENT_CLEAR_UNLOCK_PAGE 0x1
	37	#define EXTENT_CLEAR_UNLOCK 0x2
	38	#define EXTENT_CLEAR_DELALLOC 0x4
	39	#define EXTENT_CLEAR_DIRTY 0x8
	40	#define EXTENT_SET_WRITEBACK 0x10
	41	#define EXTENT_END_WRITEBACK 0x20
	42	#define EXTENT_SET_PRIVATE2 0x40
32c00aff	43	#define EXTENT_CLEAR_ACCOUNTING 0x80
a791e35e	44
d1310b2e CM	45	/*
	46	* page->private values. Every page that is controlled by the extent
	47	* map has page->private set to one.
	48	*/
	49	#define EXTENT_PAGE_PRIVATE 1
	50	#define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3
	51
70dec807 CM	52	struct extent_state;
70dec807 CM	53
44b8bd7e	54	typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
c8b97818	55	struct bio *bio, int mirror_num,
eaf25d93	56	unsigned long bio_flags, u64 bio_offset);
d1310b2e	57	struct extent_io_ops {
c8b97818	58	int (fill_delalloc)(struct inode inode, struct page *locked_page,
771ed689 CM	59	u64 start, u64 end, int *page_started,
771ed689 CM	60	unsigned long *nr_written);
247e743c	61	int (writepage_start_hook)(struct page page, u64 start, u64 end);
d1310b2e	62	int (writepage_io_hook)(struct page page, u64 start, u64 end);
44b8bd7e	63	extent_submit_bio_hook_t *submit_bio_hook;
239b14b3	64	int (merge_bio_hook)(struct page page, unsigned long offset,
c8b97818 CM	65	size_t size, struct bio *bio,
c8b97818 CM	66	unsigned long bio_flags);
d1310b2e	67	int (readpage_io_hook)(struct page page, u64 start, u64 end);
7e38326f CM	68	int (readpage_io_failed_hook)(struct bio bio, struct page *page,
	69	u64 start, u64 end,
	70	struct extent_state *state);
1259ab75 CM	71	int (writepage_io_failed_hook)(struct bio bio, struct page *page,
	72	u64 start, u64 end,
	73	struct extent_state *state);
70dec807 CM	74	int (readpage_end_io_hook)(struct page page, u64 start, u64 end,
70dec807 CM	75	struct extent_state *state);
1259ab75	76	int (writepage_end_io_hook)(struct page page, u64 start, u64 end,
e6dcd2dc	77	struct extent_state *state, int uptodate);
0ca1f7ce YZ	78	int (set_bit_hook)(struct inode inode, struct extent_state *state,
0ca1f7ce YZ	79	int *bits);
9ed74f2d	80	int (clear_bit_hook)(struct inode inode, struct extent_state *state,
0ca1f7ce	81	int *bits);
9ed74f2d JB	82	int (merge_extent_hook)(struct inode inode,
	83	struct extent_state *new,
	84	struct extent_state *other);
	85	int (split_extent_hook)(struct inode inode,
	86	struct extent_state *orig, u64 split);
4bef0848	87	int (write_cache_pages_lock_hook)(struct page page);
d1310b2e CM	88	};
	89
	90	struct extent_io_tree {
	91	struct rb_root state;
19fe0a8b	92	struct radix_tree_root buffer;
d1310b2e CM	93	struct address_space *mapping;
d1310b2e CM	94	u64 dirty_bytes;
70dec807	95	spinlock_t lock;
6af118ce	96	spinlock_t buffer_lock;
d1310b2e	97	struct extent_io_ops *ops;
d1310b2e CM	98	};
	99
	100	struct extent_state {
	101	u64 start;
	102	u64 end; /* inclusive */
d1310b2e	103	struct rb_node rb_node;
9ed74f2d JB	104
9ed74f2d JB	105	/* ADD NEW ELEMENTS AFTER THIS */
70dec807	106	struct extent_io_tree *tree;
d1310b2e CM	107	wait_queue_head_t wq;
	108	atomic_t refs;
	109	unsigned long state;
9ed74f2d JB	110	u64 split_start;
9ed74f2d JB	111	u64 split_end;
d1310b2e CM	112
	113	/* for use by the FS */
	114	u64 private;
	115
2d2ae547	116	struct list_head leak_list;
d1310b2e CM	117	};
	118
	119	struct extent_buffer {
	120	u64 start;
	121	unsigned long len;
	122	char *map_token;
	123	char *kaddr;
	124	unsigned long map_start;
	125	unsigned long map_len;
	126	struct page *first_page;
b4ce94de	127	unsigned long bflags;
d1310b2e	128	atomic_t refs;
2d2ae547	129	struct list_head leak_list;
19fe0a8b	130	struct rcu_head rcu_head;
b4ce94de CM	131
	132	/* the spinlock is used to protect most operations */
	133	spinlock_t lock;
	134
	135	/*
	136	* when we keep the lock held while blocking, waiters go onto
	137	* the wq
	138	*/
	139	wait_queue_head_t lock_wq;
d1310b2e CM	140	};
d1310b2e CM	141
261507a0 LZ	142	static inline void extent_set_compress_type(unsigned long *bio_flags,
	143	int compress_type)
	144	{
	145	*bio_flags \|= compress_type << EXTENT_BIO_FLAG_SHIFT;
	146	}
	147
	148	static inline int extent_compress_type(unsigned long bio_flags)
	149	{
	150	return bio_flags >> EXTENT_BIO_FLAG_SHIFT;
	151	}
	152
d1310b2e CM	153	struct extent_map_tree;
d1310b2e CM	154
d7fc640e CM	155	static inline struct extent_state extent_state_next(struct extent_state state)
	156	{
	157	struct rb_node *node;
	158	node = rb_next(&state->rb_node);
	159	if (!node)
	160	return NULL;
	161	return rb_entry(node, struct extent_state, rb_node);
	162	}
	163
d1310b2e CM	164	typedef struct extent_map (get_extent_t)(struct inode inode,
	165	struct page *page,
	166	size_t page_offset,
	167	u64 start, u64 len,
	168	int create);
	169
	170	void extent_io_tree_init(struct extent_io_tree *tree,
	171	struct address_space *mapping, gfp_t mask);
d1310b2e	172	int try_release_extent_mapping(struct extent_map_tree *map,
70dec807 CM	173	struct extent_io_tree tree, struct page page,
70dec807 CM	174	gfp_t mask);
6af118ce	175	int try_release_extent_buffer(struct extent_io_tree tree, struct page page);
7b13b7b1 CM	176	int try_release_extent_state(struct extent_map_tree *map,
	177	struct extent_io_tree tree, struct page page,
	178	gfp_t mask);
d1310b2e	179	int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
1edbb734	180	int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
2c64c53d	181	int bits, struct extent_state **cached, gfp_t mask);
d1310b2e	182	int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
2ac55d41 JB	183	int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
2ac55d41 JB	184	struct extent_state **cached, gfp_t mask);
25179201 JB	185	int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
25179201 JB	186	gfp_t mask);
d1310b2e CM	187	int extent_read_full_page(struct extent_io_tree tree, struct page page,
	188	get_extent_t *get_extent);
	189	int __init extent_io_init(void);
	190	void extent_io_exit(void);
	191
	192	u64 count_range_bits(struct extent_io_tree *tree,
	193	u64 *start, u64 search_end,
	194	u64 max_bytes, unsigned long bits);
	195
4845e44f	196	void free_extent_state(struct extent_state *state);
d1310b2e	197	int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
9655d298	198	int bits, int filled, struct extent_state *cached_state);
d1310b2e CM	199	int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
d1310b2e CM	200	int bits, gfp_t mask);
e6dcd2dc	201	int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
2c64c53d CM	202	int bits, int wake, int delete, struct extent_state **cached,
2c64c53d CM	203	gfp_t mask);
d1310b2e CM	204	int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
d1310b2e CM	205	int bits, gfp_t mask);
4845e44f CM	206	int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
	207	int bits, int exclusive_bits, u64 *failed_start,
	208	struct extent_state **cached_state, gfp_t mask);
d1310b2e CM	209	int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
	210	gfp_t mask);
	211	int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
	212	gfp_t mask);
	213	int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
	214	gfp_t mask);
	215	int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
	216	gfp_t mask);
e6dcd2dc CM	217	int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
	218	gfp_t mask);
	219	int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start,
	220	u64 end, gfp_t mask);
d1310b2e	221	int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
2ac55d41	222	struct extent_state **cached_state, gfp_t mask);
e6dcd2dc CM	223	int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end,
e6dcd2dc CM	224	gfp_t mask);
d1310b2e CM	225	int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
d1310b2e CM	226	u64 start_ret, u64 end_ret, int bits);
d7fc640e CM	227	struct extent_state find_first_extent_bit_state(struct extent_io_tree tree,
d7fc640e CM	228	u64 start, int bits);
d1310b2e CM	229	int extent_invalidatepage(struct extent_io_tree *tree,
	230	struct page *page, unsigned long offset);
	231	int extent_write_full_page(struct extent_io_tree tree, struct page page,
	232	get_extent_t *get_extent,
	233	struct writeback_control *wbc);
771ed689 CM	234	int extent_write_locked_range(struct extent_io_tree tree, struct inode inode,
	235	u64 start, u64 end, get_extent_t *get_extent,
	236	int mode);
d1310b2e CM	237	int extent_writepages(struct extent_io_tree *tree,
	238	struct address_space *mapping,
	239	get_extent_t *get_extent,
	240	struct writeback_control *wbc);
	241	int extent_readpages(struct extent_io_tree *tree,
	242	struct address_space *mapping,
	243	struct list_head *pages, unsigned nr_pages,
	244	get_extent_t get_extent);
	245	int extent_prepare_write(struct extent_io_tree *tree,
	246	struct inode inode, struct page page,
	247	unsigned from, unsigned to, get_extent_t *get_extent);
	248	int extent_commit_write(struct extent_io_tree *tree,
	249	struct inode inode, struct page page,
	250	unsigned from, unsigned to);
	251	sector_t extent_bmap(struct address_space *mapping, sector_t iblock,
	252	get_extent_t *get_extent);
1506fcc8 YS	253	int extent_fiemap(struct inode inode, struct fiemap_extent_info fieinfo,
1506fcc8 YS	254	__u64 start, __u64 len, get_extent_t *get_extent);
d1310b2e CM	255	int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end);
	256	int set_state_private(struct extent_io_tree *tree, u64 start, u64 private);
	257	int get_state_private(struct extent_io_tree tree, u64 start, u64 private);
	258	void set_page_extent_mapped(struct page *page);
	259
	260	struct extent_buffer alloc_extent_buffer(struct extent_io_tree tree,
	261	u64 start, unsigned long len,
	262	struct page *page0,
	263	gfp_t mask);
	264	struct extent_buffer find_extent_buffer(struct extent_io_tree tree,
	265	u64 start, unsigned long len,
	266	gfp_t mask);
	267	void free_extent_buffer(struct extent_buffer *eb);
	268	int read_extent_buffer_pages(struct extent_io_tree *tree,
a86c12c7	269	struct extent_buffer *eb, u64 start, int wait,
f188591e	270	get_extent_t *get_extent, int mirror_num);
d1310b2e CM	271
	272	static inline void extent_buffer_get(struct extent_buffer *eb)
	273	{
	274	atomic_inc(&eb->refs);
	275	}
	276
	277	int memcmp_extent_buffer(struct extent_buffer eb, const void ptrv,
	278	unsigned long start,
	279	unsigned long len);
	280	void read_extent_buffer(struct extent_buffer eb, void dst,
	281	unsigned long start,
	282	unsigned long len);
	283	void write_extent_buffer(struct extent_buffer eb, const void src,
	284	unsigned long start, unsigned long len);
	285	void copy_extent_buffer(struct extent_buffer dst, struct extent_buffer src,
	286	unsigned long dst_offset, unsigned long src_offset,
	287	unsigned long len);
	288	void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
	289	unsigned long src_offset, unsigned long len);
	290	void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
	291	unsigned long src_offset, unsigned long len);
	292	void memset_extent_buffer(struct extent_buffer *eb, char c,
	293	unsigned long start, unsigned long len);
	294	int wait_on_extent_buffer_writeback(struct extent_io_tree *tree,
	295	struct extent_buffer *eb);
e6dcd2dc CM	296	int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end);
e6dcd2dc CM	297	int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
d1310b2e CM	298	int clear_extent_buffer_dirty(struct extent_io_tree *tree,
	299	struct extent_buffer *eb);
	300	int set_extent_buffer_dirty(struct extent_io_tree *tree,
	301	struct extent_buffer *eb);
b9473439 CM	302	int test_extent_buffer_dirty(struct extent_io_tree *tree,
b9473439 CM	303	struct extent_buffer *eb);
d1310b2e CM	304	int set_extent_buffer_uptodate(struct extent_io_tree *tree,
d1310b2e CM	305	struct extent_buffer *eb);
1259ab75	306	int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
2ac55d41 JB	307	struct extent_buffer *eb,
2ac55d41 JB	308	struct extent_state **cached_state);
d1310b2e	309	int extent_buffer_uptodate(struct extent_io_tree *tree,
2ac55d41 JB	310	struct extent_buffer *eb,
2ac55d41 JB	311	struct extent_state *cached_state);
d1310b2e CM	312	int map_extent_buffer(struct extent_buffer *eb, unsigned long offset,
	313	unsigned long min_len, char token, char map,
	314	unsigned long *map_start,
	315	unsigned long *map_len, int km);
	316	int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
	317	unsigned long min_len, char token, char map,
	318	unsigned long *map_start,
	319	unsigned long *map_len, int km);
	320	void unmap_extent_buffer(struct extent_buffer eb, char token, int km);
ce9adaa5 CM	321	int release_extent_buffer_tail_pages(struct extent_buffer *eb);
	322	int extent_range_uptodate(struct extent_io_tree *tree,
	323	u64 start, u64 end);
c8b97818 CM	324	int extent_clear_unlock_delalloc(struct inode *inode,
	325	struct extent_io_tree *tree,
	326	u64 start, u64 end, struct page *locked_page,
a791e35e	327	unsigned long op);
88f794ed MX	328	struct bio *
	329	btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
	330	gfp_t gfp_flags);
d1310b2e	331	#endif