1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_INODE_H
3#define _BCACHEFS_INODE_H
4
5#include "bkey.h"
6#include "bkey_methods.h"
7#include "opts.h"
8
9enum bkey_invalid_flags;
10extern const char * const bch2_inode_opts[];
11
12int bch2_inode_invalid(struct bch_fs *, struct bkey_s_c,
13 enum bkey_invalid_flags, struct printbuf *);
14int bch2_inode_v2_invalid(struct bch_fs *, struct bkey_s_c,
15 enum bkey_invalid_flags, struct printbuf *);
16int bch2_inode_v3_invalid(struct bch_fs *, struct bkey_s_c,
17 enum bkey_invalid_flags, struct printbuf *);
18void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
19
20int bch2_trigger_inode(struct btree_trans *, enum btree_id, unsigned,
21 struct bkey_s_c, struct bkey_s, unsigned);
22
23#define bch2_bkey_ops_inode ((struct bkey_ops) { \
24 .key_invalid = bch2_inode_invalid, \
25 .val_to_text = bch2_inode_to_text, \
26 .trigger = bch2_trigger_inode, \
27 .min_val_size = 16, \
28})
29
30#define bch2_bkey_ops_inode_v2 ((struct bkey_ops) { \
31 .key_invalid = bch2_inode_v2_invalid, \
32 .val_to_text = bch2_inode_to_text, \
33 .trigger = bch2_trigger_inode, \
34 .min_val_size = 32, \
35})
36
37#define bch2_bkey_ops_inode_v3 ((struct bkey_ops) { \
38 .key_invalid = bch2_inode_v3_invalid, \
39 .val_to_text = bch2_inode_to_text, \
40 .trigger = bch2_trigger_inode, \
41 .min_val_size = 48, \
42})
43
44static inline bool bkey_is_inode(const struct bkey *k)
45{
46 return k->type == KEY_TYPE_inode ||
47 k->type == KEY_TYPE_inode_v2 ||
48 k->type == KEY_TYPE_inode_v3;
49}
50
51int bch2_inode_generation_invalid(struct bch_fs *, struct bkey_s_c,
52 enum bkey_invalid_flags, struct printbuf *);
53void bch2_inode_generation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
54
55#define bch2_bkey_ops_inode_generation ((struct bkey_ops) { \
56 .key_invalid = bch2_inode_generation_invalid, \
57 .val_to_text = bch2_inode_generation_to_text, \
58 .min_val_size = 8, \
59})
60
61#if 0
62typedef struct {
63 u64 lo;
64 u32 hi;
65} __packed __aligned(4) u96;
66#endif
67typedef u64 u96;
68
69struct bch_inode_unpacked {
70 u64 bi_inum;
71 u64 bi_journal_seq;
72 __le64 bi_hash_seed;
73 u64 bi_size;
74 u64 bi_sectors;
75 u64 bi_version;
76 u32 bi_flags;
77 u16 bi_mode;
78
79#define x(_name, _bits) u##_bits _name;
80 BCH_INODE_FIELDS_v3()
81#undef x
82};
83
84struct bkey_inode_buf {
85 struct bkey_i_inode_v3 inode;
86
87#define x(_name, _bits) + 8 + _bits / 8
88 u8 _pad[0 + BCH_INODE_FIELDS_v3()];
89#undef x
90} __packed __aligned(8);
91
92void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *);
93int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *);
94struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *);
95
96void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *);
97
98int bch2_inode_peek_nowarn(struct btree_trans *, struct btree_iter *,
99 struct bch_inode_unpacked *, subvol_inum, unsigned);
100int bch2_inode_peek(struct btree_trans *, struct btree_iter *,
101 struct bch_inode_unpacked *, subvol_inum, unsigned);
102
103int bch2_inode_write_flags(struct btree_trans *, struct btree_iter *,
104 struct bch_inode_unpacked *, enum btree_update_flags);
105
106static inline int bch2_inode_write(struct btree_trans *trans,
107 struct btree_iter *iter,
108 struct bch_inode_unpacked *inode)
109{
110 return bch2_inode_write_flags(trans, iter, inode, 0);
111}
112
113int __bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32);
114int bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32);
115
116void bch2_inode_init_early(struct bch_fs *,
117 struct bch_inode_unpacked *);
118void bch2_inode_init_late(struct bch_inode_unpacked *, u64,
119 uid_t, gid_t, umode_t, dev_t,
120 struct bch_inode_unpacked *);
121void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *,
122 uid_t, gid_t, umode_t, dev_t,
123 struct bch_inode_unpacked *);
124
125int bch2_inode_create(struct btree_trans *, struct btree_iter *,
126 struct bch_inode_unpacked *, u32, u64);
127
128int bch2_inode_rm(struct bch_fs *, subvol_inum);
129
130int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *,
131 subvol_inum,
132 struct bch_inode_unpacked *);
133int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum,
134 struct bch_inode_unpacked *);
135int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum,
136 struct bch_inode_unpacked *);
137
138#define inode_opt_get(_c, _inode, _name) \
139 ((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name)
140
141static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode,
142 enum inode_opt_id id, u64 v)
143{
144 switch (id) {
145#define x(_name, ...) \
146 case Inode_opt_##_name: \
147 inode->bi_##_name = v; \
148 break;
149 BCH_INODE_OPTS()
150#undef x
151 default:
152 BUG();
153 }
154}
155
156static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode,
157 enum inode_opt_id id)
158{
159 switch (id) {
160#define x(_name, ...) \
161 case Inode_opt_##_name: \
162 return inode->bi_##_name;
163 BCH_INODE_OPTS()
164#undef x
165 default:
166 BUG();
167 }
168}
169
170static inline u8 mode_to_type(umode_t mode)
171{
172 return (mode >> 12) & 15;
173}
174
175static inline u8 inode_d_type(struct bch_inode_unpacked *inode)
176{
177 return inode->bi_subvol ? DT_SUBVOL : mode_to_type(mode: inode->bi_mode);
178}
179
180static inline u32 bch2_inode_flags(struct bkey_s_c k)
181{
182 switch (k.k->type) {
183 case KEY_TYPE_inode:
184 return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags);
185 case KEY_TYPE_inode_v2:
186 return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags);
187 case KEY_TYPE_inode_v3:
188 return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags);
189 default:
190 return 0;
191 }
192}
193
194/* i_nlink: */
195
196static inline unsigned nlink_bias(umode_t mode)
197{
198 return S_ISDIR(mode) ? 2 : 1;
199}
200
201static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi)
202{
203 return bi->bi_flags & BCH_INODE_unlinked
204 ? 0
205 : bi->bi_nlink + nlink_bias(mode: bi->bi_mode);
206}
207
208static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi,
209 unsigned nlink)
210{
211 if (nlink) {
212 bi->bi_nlink = nlink - nlink_bias(mode: bi->bi_mode);
213 bi->bi_flags &= ~BCH_INODE_unlinked;
214 } else {
215 bi->bi_nlink = 0;
216 bi->bi_flags |= BCH_INODE_unlinked;
217 }
218}
219
220int bch2_inode_nlink_inc(struct bch_inode_unpacked *);
221void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *);
222
223struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *);
224void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *,
225 struct bch_inode_unpacked *);
226int bch2_inum_opts_get(struct btree_trans*, subvol_inum, struct bch_io_opts *);
227
228int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32);
229int bch2_delete_dead_inodes(struct bch_fs *);
230
231#endif /* _BCACHEFS_INODE_H */
232

source code of linux/fs/bcachefs/inode.h