1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef BTRFS_FILE_ITEM_H
4 #define BTRFS_FILE_ITEM_H
5
6 #include <linux/blk_types.h>
7 #include <linux/list.h>
8 #include <uapi/linux/btrfs_tree.h>
9 #include "ctree.h"
10 #include "accessors.h"
11
12 struct extent_map;
13 struct btrfs_file_extent_item;
14 struct btrfs_fs_info;
15 struct btrfs_path;
16 struct btrfs_bio;
17 struct btrfs_trans_handle;
18 struct btrfs_root;
19 struct btrfs_ordered_sum;
20 struct btrfs_path;
21 struct btrfs_inode;
22
23 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
24 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
25
BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info * info)26 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
27 {
28 return BTRFS_MAX_ITEM_SIZE(info) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
29 }
30
31 /*
32 * Return the number of bytes used by the item on disk, minus the size of any
33 * extent headers. If a file is compressed on disk, this is the compressed
34 * size.
35 */
btrfs_file_extent_inline_item_len(const struct extent_buffer * eb,int nr)36 static inline u32 btrfs_file_extent_inline_item_len(
37 const struct extent_buffer *eb,
38 int nr)
39 {
40 return btrfs_item_size(eb, nr) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
41 }
42
btrfs_file_extent_inline_start(const struct btrfs_file_extent_item * e)43 static inline unsigned long btrfs_file_extent_inline_start(
44 const struct btrfs_file_extent_item *e)
45 {
46 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
47 }
48
btrfs_file_extent_calc_inline_size(u32 datasize)49 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
50 {
51 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
52 }
53
54 int btrfs_del_csums(struct btrfs_trans_handle *trans,
55 struct btrfs_root *root, u64 bytenr, u64 len);
56 blk_status_t btrfs_lookup_bio_sums(struct btrfs_bio *bbio);
57 int btrfs_insert_hole_extent(struct btrfs_trans_handle *trans,
58 struct btrfs_root *root, u64 objectid, u64 pos,
59 u64 num_bytes);
60 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
61 struct btrfs_root *root,
62 struct btrfs_path *path, u64 objectid,
63 u64 bytenr, int mod);
64 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
65 struct btrfs_root *root,
66 struct btrfs_ordered_sum *sums);
67 blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio);
68 blk_status_t btrfs_alloc_dummy_sum(struct btrfs_bio *bbio);
69 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
70 struct list_head *list, int search_commit,
71 bool nowait);
72 int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
73 struct list_head *list, bool nowait);
74 int btrfs_lookup_csums_bitmap(struct btrfs_root *root, struct btrfs_path *path,
75 u64 start, u64 end, u8 *csum_buf,
76 unsigned long *csum_bitmap);
77 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
78 const struct btrfs_path *path,
79 const struct btrfs_file_extent_item *fi,
80 struct extent_map *em);
81 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
82 u64 len);
83 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, u64 len);
84 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size);
85 u64 btrfs_file_extent_end(const struct btrfs_path *path);
86
87 #endif
88