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