linux/fs/btrfs/extent-io-tree.h

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef BTRFS_EXTENT_IO_TREE_H
#define BTRFS_EXTENT_IO_TREE_H

#include <linux/rbtree.h>
#include <linux/spinlock.h>
#include <linux/refcount.h>
#include <linux/list.h>
#include <linux/wait.h>
#include "misc.h"

struct extent_changeset;
struct btrfs_fs_info;
struct btrfs_inode;

/* Bits for the extent state */
enum { … };

#define EXTENT_DO_ACCOUNTING …
#define EXTENT_CTLBITS …

/*
 * Redefined bits above which are used only in the device allocation tree,
 * shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV
 * / EXTENT_CLEAR_DATA_RESV because they have special meaning to the bit
 * manipulation functions
 */
#define CHUNK_ALLOCATED …
#define CHUNK_TRIMMED …
#define CHUNK_STATE_MASK …

enum { … };

struct extent_io_tree { … };

struct extent_state { … };

struct btrfs_inode *extent_io_tree_to_inode(struct extent_io_tree *tree);
const struct btrfs_inode *extent_io_tree_to_inode_const(const struct extent_io_tree *tree);
const struct btrfs_fs_info *extent_io_tree_to_fs_info(const struct extent_io_tree *tree);

void extent_io_tree_init(struct btrfs_fs_info *fs_info,
			 struct extent_io_tree *tree, unsigned int owner);
void extent_io_tree_release(struct extent_io_tree *tree);

int lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
		struct extent_state **cached);

int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
		    struct extent_state **cached);

int __init extent_state_init_cachep(void);
void __cold extent_state_free_cachep(void);

u64 count_range_bits(struct extent_io_tree *tree,
		     u64 *start, u64 search_end,
		     u64 max_bytes, u32 bits, int contig,
		     struct extent_state **cached_state);

void free_extent_state(struct extent_state *state);
bool test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, u32 bit,
		    struct extent_state *cached_state);
bool test_range_bit_exists(struct extent_io_tree *tree, u64 start, u64 end, u32 bit);
int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
			     u32 bits, struct extent_changeset *changeset);
int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
		       u32 bits, struct extent_state **cached,
		       struct extent_changeset *changeset);

static inline int clear_extent_bit(struct extent_io_tree *tree, u64 start,
				   u64 end, u32 bits,
				   struct extent_state **cached)
{ … }

static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end,
				struct extent_state **cached)
{ … }

static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
				    u64 end, u32 bits)
{ … }

int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
			   u32 bits, struct extent_changeset *changeset);
int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
		   u32 bits, struct extent_state **cached_state);

static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
		u64 end, struct extent_state **cached_state)
{ … }

static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
				     u64 end, struct extent_state **cached)
{ … }

int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
		       u32 bits, u32 clear_bits,
		       struct extent_state **cached_state);

bool find_first_extent_bit(struct extent_io_tree *tree, u64 start,
			   u64 *start_ret, u64 *end_ret, u32 bits,
			   struct extent_state **cached_state);
void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
				 u64 *start_ret, u64 *end_ret, u32 bits);
int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start,
			       u64 *start_ret, u64 *end_ret, u32 bits);
bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start,
			       u64 *end, u64 max_bytes,
			       struct extent_state **cached_state);

#endif /* BTRFS_EXTENT_IO_TREE_H */