mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-09-21 12:11:49 +08:00
ca283ea992
Continue adding const to parameters. This is for clarity and minor addition to safety. There are some minor effects, in the assembly code and .ko measured on release config. Signed-off-by: David Sterba <dsterba@suse.com>
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#ifndef BTRFS_FILE_ITEM_H
|
|
#define BTRFS_FILE_ITEM_H
|
|
|
|
#include <linux/list.h>
|
|
#include <uapi/linux/btrfs_tree.h>
|
|
#include "accessors.h"
|
|
|
|
struct extent_map;
|
|
struct btrfs_file_extent_item;
|
|
struct btrfs_fs_info;
|
|
struct btrfs_path;
|
|
struct btrfs_bio;
|
|
struct btrfs_trans_handle;
|
|
struct btrfs_root;
|
|
struct btrfs_ordered_sum;
|
|
struct btrfs_path;
|
|
struct btrfs_inode;
|
|
|
|
#define BTRFS_FILE_EXTENT_INLINE_DATA_START \
|
|
(offsetof(struct btrfs_file_extent_item, disk_bytenr))
|
|
|
|
static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
|
|
{
|
|
return BTRFS_MAX_ITEM_SIZE(info) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
|
|
}
|
|
|
|
/*
|
|
* Return the number of bytes used by the item on disk, minus the size of any
|
|
* extent headers. If a file is compressed on disk, this is the compressed
|
|
* size.
|
|
*/
|
|
static inline u32 btrfs_file_extent_inline_item_len(
|
|
const struct extent_buffer *eb,
|
|
int nr)
|
|
{
|
|
return btrfs_item_size(eb, nr) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
|
|
}
|
|
|
|
static inline unsigned long btrfs_file_extent_inline_start(
|
|
const struct btrfs_file_extent_item *e)
|
|
{
|
|
return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
|
|
}
|
|
|
|
static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
|
|
{
|
|
return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
|
|
}
|
|
|
|
int btrfs_del_csums(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 bytenr, u64 len);
|
|
blk_status_t btrfs_lookup_bio_sums(struct btrfs_bio *bbio);
|
|
int btrfs_insert_hole_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 objectid, u64 pos,
|
|
u64 num_bytes);
|
|
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 objectid,
|
|
u64 bytenr, int mod);
|
|
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_ordered_sum *sums);
|
|
blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio);
|
|
blk_status_t btrfs_alloc_dummy_sum(struct btrfs_bio *bbio);
|
|
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
|
|
struct list_head *list, int search_commit,
|
|
bool nowait);
|
|
int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
|
|
struct list_head *list, bool nowait);
|
|
int btrfs_lookup_csums_bitmap(struct btrfs_root *root, struct btrfs_path *path,
|
|
u64 start, u64 end, u8 *csum_buf,
|
|
unsigned long *csum_bitmap);
|
|
void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
|
|
const struct btrfs_path *path,
|
|
const struct btrfs_file_extent_item *fi,
|
|
struct extent_map *em);
|
|
int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
|
|
u64 len);
|
|
int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, u64 len);
|
|
void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size);
|
|
u64 btrfs_file_extent_end(const struct btrfs_path *path);
|
|
|
|
#endif
|