1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_DIRENT_H
3 #define _BCACHEFS_DIRENT_H
4
5 #include "str_hash.h"
6
7 enum bch_validate_flags;
8 extern const struct bch_hash_desc bch2_dirent_hash_desc;
9
10 int bch2_dirent_validate(struct bch_fs *, struct bkey_s_c, enum bch_validate_flags);
11 void bch2_dirent_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
12
13 #define bch2_bkey_ops_dirent ((struct bkey_ops) { \
14 .key_validate = bch2_dirent_validate, \
15 .val_to_text = bch2_dirent_to_text, \
16 .min_val_size = 16, \
17 })
18
19 struct qstr;
20 struct file;
21 struct dir_context;
22 struct bch_fs;
23 struct bch_hash_info;
24 struct bch_inode_info;
25
26 struct qstr bch2_dirent_get_name(struct bkey_s_c_dirent d);
27
dirent_val_u64s(unsigned len)28 static inline unsigned dirent_val_u64s(unsigned len)
29 {
30 return DIV_ROUND_UP(offsetof(struct bch_dirent, d_name) + len,
31 sizeof(u64));
32 }
33
34 int bch2_dirent_read_target(struct btree_trans *, subvol_inum,
35 struct bkey_s_c_dirent, subvol_inum *);
36
dirent_copy_target(struct bkey_i_dirent * dst,struct bkey_s_c_dirent src)37 static inline void dirent_copy_target(struct bkey_i_dirent *dst,
38 struct bkey_s_c_dirent src)
39 {
40 dst->v.d_inum = src.v->d_inum;
41 dst->v.d_type = src.v->d_type;
42 }
43
44 int bch2_dirent_create_snapshot(struct btree_trans *, u32, u64, u32,
45 const struct bch_hash_info *, u8,
46 const struct qstr *, u64, u64 *,
47 enum btree_iter_update_trigger_flags);
48 int bch2_dirent_create(struct btree_trans *, subvol_inum,
49 const struct bch_hash_info *, u8,
50 const struct qstr *, u64, u64 *,
51 enum btree_iter_update_trigger_flags);
52
vfs_d_type(unsigned type)53 static inline unsigned vfs_d_type(unsigned type)
54 {
55 return type == DT_SUBVOL ? DT_DIR : type;
56 }
57
58 enum bch_rename_mode {
59 BCH_RENAME,
60 BCH_RENAME_OVERWRITE,
61 BCH_RENAME_EXCHANGE,
62 };
63
64 int bch2_dirent_rename(struct btree_trans *,
65 subvol_inum, struct bch_hash_info *,
66 subvol_inum, struct bch_hash_info *,
67 const struct qstr *, subvol_inum *, u64 *,
68 const struct qstr *, subvol_inum *, u64 *,
69 enum bch_rename_mode);
70
71 int bch2_dirent_lookup_trans(struct btree_trans *, struct btree_iter *,
72 subvol_inum, const struct bch_hash_info *,
73 const struct qstr *, subvol_inum *, unsigned);
74 u64 bch2_dirent_lookup(struct bch_fs *, subvol_inum,
75 const struct bch_hash_info *,
76 const struct qstr *, subvol_inum *);
77
78 int bch2_empty_dir_snapshot(struct btree_trans *, u64, u32, u32);
79 int bch2_empty_dir_trans(struct btree_trans *, subvol_inum);
80 int bch2_readdir(struct bch_fs *, subvol_inum, struct dir_context *);
81
82 #endif /* _BCACHEFS_DIRENT_H */
83