mirror of https://gitee.com/openkylin/linux.git
237 lines
8.6 KiB
C
237 lines
8.6 KiB
C
#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_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
|
|
|
|
/*
|
|
* page->private values. Every page that is controlled by the extent
|
|
* map has page->private set to one.
|
|
*/
|
|
#define EXTENT_PAGE_PRIVATE 1
|
|
#define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3
|
|
|
|
struct extent_state;
|
|
|
|
typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
|
|
struct bio *bio, int mirror_num);
|
|
struct extent_io_ops {
|
|
int (*fill_delalloc)(struct inode *inode, 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);
|
|
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 (*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);
|
|
};
|
|
|
|
struct extent_io_tree {
|
|
struct rb_root state;
|
|
struct address_space *mapping;
|
|
u64 dirty_bytes;
|
|
spinlock_t lock;
|
|
struct extent_io_ops *ops;
|
|
spinlock_t lru_lock;
|
|
struct list_head buffer_lru;
|
|
int lru_size;
|
|
struct extent_state *last;
|
|
};
|
|
|
|
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;
|
|
struct list_head lru;
|
|
atomic_t refs;
|
|
int flags;
|
|
struct list_head leak_list;
|
|
};
|
|
|
|
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);
|
|
void extent_io_tree_empty_lru(struct extent_io_tree *tree);
|
|
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_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 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 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 set_extent_delalloc(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_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 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 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 invalidate_extent_lru(struct extent_io_tree *tree, u64 start,
|
|
unsigned long len);
|
|
int release_extent_buffer_tail_pages(struct extent_buffer *eb);
|
|
int extent_range_uptodate(struct extent_io_tree *tree,
|
|
u64 start, u64 end);
|
|
#endif
|