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 extern const struct bch_hash_desc bch2_dirent_hash_desc;
8
9 int bch2_dirent_validate(struct bch_fs *, struct bkey_s_c,
10 struct bkey_validate_context);
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 #ifdef CONFIG_UNICODE
27 int bch2_casefold(struct btree_trans *, const struct bch_hash_info *,
28 const struct qstr *, struct qstr *);
29 #else
bch2_casefold(struct btree_trans * trans,const struct bch_hash_info * info,const struct qstr * str,struct qstr * out_cf)30 static inline int bch2_casefold(struct btree_trans *trans, const struct bch_hash_info *info,
31 const struct qstr *str, struct qstr *out_cf)
32 {
33 return -EOPNOTSUPP;
34 }
35 #endif
36
bch2_maybe_casefold(struct btree_trans * trans,const struct bch_hash_info * info,const struct qstr * str,struct qstr * out_cf)37 static inline int bch2_maybe_casefold(struct btree_trans *trans,
38 const struct bch_hash_info *info,
39 const struct qstr *str, struct qstr *out_cf)
40 {
41 if (likely(!info->cf_encoding)) {
42 *out_cf = *str;
43 return 0;
44 } else {
45 return bch2_casefold(trans, info, str, out_cf);
46 }
47 }
48
49 struct qstr bch2_dirent_get_name(struct bkey_s_c_dirent);
50
dirent_val_u64s(unsigned len,unsigned cf_len)51 static inline unsigned dirent_val_u64s(unsigned len, unsigned cf_len)
52 {
53 unsigned bytes = cf_len
54 ? offsetof(struct bch_dirent, d_cf_name_block.d_names) + len + cf_len
55 : offsetof(struct bch_dirent, d_name) + len;
56
57 return DIV_ROUND_UP(bytes, sizeof(u64));
58 }
59
60 int bch2_dirent_read_target(struct btree_trans *, subvol_inum,
61 struct bkey_s_c_dirent, subvol_inum *);
62
dirent_copy_target(struct bkey_i_dirent * dst,struct bkey_s_c_dirent src)63 static inline void dirent_copy_target(struct bkey_i_dirent *dst,
64 struct bkey_s_c_dirent src)
65 {
66 dst->v.d_inum = src.v->d_inum;
67 dst->v.d_type = src.v->d_type;
68 }
69
70 int bch2_dirent_init_name(struct bch_fs *,
71 struct bkey_i_dirent *,
72 const struct bch_hash_info *,
73 const struct qstr *,
74 const struct qstr *);
75 struct bkey_i_dirent *bch2_dirent_create_key(struct btree_trans *,
76 const struct bch_hash_info *, subvol_inum, u8,
77 const struct qstr *, const struct qstr *, u64);
78
79 int bch2_dirent_create_snapshot(struct btree_trans *, u32, u64, u32,
80 const struct bch_hash_info *, u8,
81 const struct qstr *, u64, u64 *,
82 enum btree_iter_update_trigger_flags);
83 int bch2_dirent_create(struct btree_trans *, subvol_inum,
84 const struct bch_hash_info *, u8,
85 const struct qstr *, u64, u64 *,
86 enum btree_iter_update_trigger_flags);
87
vfs_d_type(unsigned type)88 static inline unsigned vfs_d_type(unsigned type)
89 {
90 return type == DT_SUBVOL ? DT_DIR : type;
91 }
92
93 enum bch_rename_mode {
94 BCH_RENAME,
95 BCH_RENAME_OVERWRITE,
96 BCH_RENAME_EXCHANGE,
97 };
98
99 int bch2_dirent_rename(struct btree_trans *,
100 subvol_inum, struct bch_hash_info *,
101 subvol_inum, struct bch_hash_info *,
102 const struct qstr *, subvol_inum *, u64 *,
103 const struct qstr *, subvol_inum *, u64 *,
104 enum bch_rename_mode);
105
106 int bch2_dirent_lookup_trans(struct btree_trans *, struct btree_iter *,
107 subvol_inum, const struct bch_hash_info *,
108 const struct qstr *, subvol_inum *, unsigned);
109 u64 bch2_dirent_lookup(struct bch_fs *, subvol_inum,
110 const struct bch_hash_info *,
111 const struct qstr *, subvol_inum *);
112
113 int bch2_empty_dir_snapshot(struct btree_trans *, u64, u32, u32);
114 int bch2_empty_dir_trans(struct btree_trans *, subvol_inum);
115 int bch2_readdir(struct bch_fs *, subvol_inum, struct bch_hash_info *, struct dir_context *);
116
117 int bch2_fsck_remove_dirent(struct btree_trans *, struct bpos);
118
119 #endif /* _BCACHEFS_DIRENT_H */
120