1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef BTRFS_FILE_ITEM_H
4 #define BTRFS_FILE_ITEM_H
5
6 #include <linux/list.h>
7 #include <uapi/linux/btrfs_tree.h>
8 #include "accessors.h"
9
10 struct extent_map;
11 struct btrfs_file_extent_item;
12 struct btrfs_fs_info;
13 struct btrfs_path;
14 struct btrfs_bio;
15 struct btrfs_trans_handle;
16 struct btrfs_root;
17 struct btrfs_ordered_sum;
18 struct btrfs_path;
19 struct btrfs_inode;
20
21 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
22 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
23
24 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
25 {
26 return BTRFS_MAX_ITEM_SIZE(info) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
27 }
28
29 /*
30 * Return the number of bytes used by the item on disk, minus the size of any
31 * extent headers. If a file is compressed on disk, this is the compressed
32 * size.
33 */
34 static inline u32 btrfs_file_extent_inline_item_len(
35 const struct extent_buffer *eb,
36 int nr)
37 {
38 return btrfs_item_size(eb, nr) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
39 }
40
41 static inline unsigned long btrfs_file_extent_inline_start(
42 const struct btrfs_file_extent_item *e)
43 {
44 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
45 }
46
47 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
48 {
49 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
50 }
51
52 int btrfs_del_csums(struct btrfs_trans_handle *trans,
53 struct btrfs_root *root, u64 bytenr, u64 len);
54 blk_status_t btrfs_lookup_bio_sums(struct btrfs_bio *bbio);
55 int btrfs_insert_hole_extent(struct btrfs_trans_handle *trans,
56 struct btrfs_root *root, u64 objectid, u64 pos,
57 u64 num_bytes);
58 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
59 struct btrfs_root *root,
60 struct btrfs_path *path, u64 objectid,
61 u64 bytenr, int mod);
62 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
63 struct btrfs_root *root,
64 struct btrfs_ordered_sum *sums);
65 blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio);
66 blk_status_t btrfs_alloc_dummy_sum(struct btrfs_bio *bbio);
67 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
68 struct list_head *list, int search_commit,
69 bool nowait);
70 int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
71 struct list_head *list, bool nowait);
72 int btrfs_lookup_csums_bitmap(struct btrfs_root *root, struct btrfs_path *path,
73 u64 start, u64 end, u8 *csum_buf,
74 unsigned long *csum_bitmap);
75 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
76 const struct btrfs_path *path,
77 struct btrfs_file_extent_item *fi,
78 struct extent_map *em);
79 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
80 u64 len);
81 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, u64 len);
82 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size);
83 u64 btrfs_file_extent_end(const struct btrfs_path *path);
84
85 #endif
86
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.