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
9 enum bch_validate_flags;
10 extern const char * const bch2_inode_opts[];
11
12 int bch2_inode_validate(struct bch_fs *, struct bkey_s_c,
13 enum bch_validate_flags);
14 int bch2_inode_v2_validate(struct bch_fs *, struct bkey_s_c,
15 enum bch_validate_flags);
16 int bch2_inode_v3_validate(struct bch_fs *, struct bkey_s_c,
17 enum bch_validate_flags);
18 void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
19
20 int bch2_trigger_inode(struct btree_trans *, enum btree_id, unsigned,
21 struct bkey_s_c, struct bkey_s,
22 enum btree_iter_update_trigger_flags);
23
24 #define bch2_bkey_ops_inode ((struct bkey_ops) { \
25 .key_validate = bch2_inode_validate, \
26 .val_to_text = bch2_inode_to_text, \
27 .trigger = bch2_trigger_inode, \
28 .min_val_size = 16, \
29 })
30
31 #define bch2_bkey_ops_inode_v2 ((struct bkey_ops) { \
32 .key_validate = bch2_inode_v2_validate, \
33 .val_to_text = bch2_inode_to_text, \
34 .trigger = bch2_trigger_inode, \
35 .min_val_size = 32, \
36 })
37
38 #define bch2_bkey_ops_inode_v3 ((struct bkey_ops) { \
39 .key_validate = bch2_inode_v3_validate, \
40 .val_to_text = bch2_inode_to_text, \
41 .trigger = bch2_trigger_inode, \
42 .min_val_size = 48, \
43 })
44
bkey_is_inode(const struct bkey * k)45 static inline bool bkey_is_inode(const struct bkey *k)
46 {
47 return k->type == KEY_TYPE_inode ||
48 k->type == KEY_TYPE_inode_v2 ||
49 k->type == KEY_TYPE_inode_v3;
50 }
51
52 int bch2_inode_generation_validate(struct bch_fs *, struct bkey_s_c,
53 enum bch_validate_flags);
54 void bch2_inode_generation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
55
56 #define bch2_bkey_ops_inode_generation ((struct bkey_ops) { \
57 .key_validate = bch2_inode_generation_validate, \
58 .val_to_text = bch2_inode_generation_to_text, \
59 .min_val_size = 8, \
60 })
61
62 #if 0
63 typedef struct {
64 u64 lo;
65 u32 hi;
66 } __packed __aligned(4) u96;
67 #endif
68 typedef u64 u96;
69
70 struct bch_inode_unpacked {
71 u64 bi_inum;
72 u32 bi_snapshot;
73 u64 bi_journal_seq;
74 __le64 bi_hash_seed;
75 u64 bi_size;
76 u64 bi_sectors;
77 u64 bi_version;
78 u32 bi_flags;
79 u16 bi_mode;
80
81 #define x(_name, _bits) u##_bits _name;
82 BCH_INODE_FIELDS_v3()
83 #undef x
84 };
85
86 struct bkey_inode_buf {
87 struct bkey_i_inode_v3 inode;
88
89 #define x(_name, _bits) + 8 + _bits / 8
90 u8 _pad[0 + BCH_INODE_FIELDS_v3()];
91 #undef x
92 };
93
94 void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *);
95 int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *);
96 struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *);
97
98 void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *);
99
100 int bch2_inode_peek_nowarn(struct btree_trans *, struct btree_iter *,
101 struct bch_inode_unpacked *, subvol_inum, unsigned);
102 int bch2_inode_peek(struct btree_trans *, struct btree_iter *,
103 struct bch_inode_unpacked *, subvol_inum, unsigned);
104
105 int bch2_inode_write_flags(struct btree_trans *, struct btree_iter *,
106 struct bch_inode_unpacked *, enum btree_iter_update_trigger_flags);
107
bch2_inode_write(struct btree_trans * trans,struct btree_iter * iter,struct bch_inode_unpacked * inode)108 static inline int bch2_inode_write(struct btree_trans *trans,
109 struct btree_iter *iter,
110 struct bch_inode_unpacked *inode)
111 {
112 return bch2_inode_write_flags(trans, iter, inode, 0);
113 }
114
115 int __bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32);
116 int bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *, u32);
117
118 void bch2_inode_init_early(struct bch_fs *,
119 struct bch_inode_unpacked *);
120 void bch2_inode_init_late(struct bch_inode_unpacked *, u64,
121 uid_t, gid_t, umode_t, dev_t,
122 struct bch_inode_unpacked *);
123 void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *,
124 uid_t, gid_t, umode_t, dev_t,
125 struct bch_inode_unpacked *);
126
127 int bch2_inode_create(struct btree_trans *, struct btree_iter *,
128 struct bch_inode_unpacked *, u32, u64);
129
130 int bch2_inode_rm(struct bch_fs *, subvol_inum);
131
132 int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *,
133 subvol_inum,
134 struct bch_inode_unpacked *);
135 int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum,
136 struct bch_inode_unpacked *);
137 int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum,
138 struct bch_inode_unpacked *);
139
140 #define inode_opt_get(_c, _inode, _name) \
141 ((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name)
142
bch2_inode_opt_set(struct bch_inode_unpacked * inode,enum inode_opt_id id,u64 v)143 static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode,
144 enum inode_opt_id id, u64 v)
145 {
146 switch (id) {
147 #define x(_name, ...) \
148 case Inode_opt_##_name: \
149 inode->bi_##_name = v; \
150 break;
151 BCH_INODE_OPTS()
152 #undef x
153 default:
154 BUG();
155 }
156 }
157
bch2_inode_opt_get(struct bch_inode_unpacked * inode,enum inode_opt_id id)158 static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode,
159 enum inode_opt_id id)
160 {
161 switch (id) {
162 #define x(_name, ...) \
163 case Inode_opt_##_name: \
164 return inode->bi_##_name;
165 BCH_INODE_OPTS()
166 #undef x
167 default:
168 BUG();
169 }
170 }
171
mode_to_type(umode_t mode)172 static inline u8 mode_to_type(umode_t mode)
173 {
174 return (mode >> 12) & 15;
175 }
176
inode_d_type(struct bch_inode_unpacked * inode)177 static inline u8 inode_d_type(struct bch_inode_unpacked *inode)
178 {
179 return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode);
180 }
181
bch2_inode_flags(struct bkey_s_c k)182 static inline u32 bch2_inode_flags(struct bkey_s_c k)
183 {
184 switch (k.k->type) {
185 case KEY_TYPE_inode:
186 return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags);
187 case KEY_TYPE_inode_v2:
188 return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags);
189 case KEY_TYPE_inode_v3:
190 return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags);
191 default:
192 return 0;
193 }
194 }
195
196 /* i_nlink: */
197
nlink_bias(umode_t mode)198 static inline unsigned nlink_bias(umode_t mode)
199 {
200 return S_ISDIR(mode) ? 2 : 1;
201 }
202
bch2_inode_nlink_get(struct bch_inode_unpacked * bi)203 static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi)
204 {
205 return bi->bi_flags & BCH_INODE_unlinked
206 ? 0
207 : bi->bi_nlink + nlink_bias(bi->bi_mode);
208 }
209
bch2_inode_nlink_set(struct bch_inode_unpacked * bi,unsigned nlink)210 static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi,
211 unsigned nlink)
212 {
213 if (nlink) {
214 bi->bi_nlink = nlink - nlink_bias(bi->bi_mode);
215 bi->bi_flags &= ~BCH_INODE_unlinked;
216 } else {
217 bi->bi_nlink = 0;
218 bi->bi_flags |= BCH_INODE_unlinked;
219 }
220 }
221
222 int bch2_inode_nlink_inc(struct bch_inode_unpacked *);
223 void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *);
224
bch2_inode_should_have_bp(struct bch_inode_unpacked * inode)225 static inline bool bch2_inode_should_have_bp(struct bch_inode_unpacked *inode)
226 {
227 bool inode_has_bp = inode->bi_dir || inode->bi_dir_offset;
228
229 return S_ISDIR(inode->bi_mode) ||
230 (!inode->bi_nlink && inode_has_bp);
231 }
232
233 struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *);
234 void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *,
235 struct bch_inode_unpacked *);
236 int bch2_inum_opts_get(struct btree_trans*, subvol_inum, struct bch_io_opts *);
237
238 int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32);
239 int bch2_delete_dead_inodes(struct bch_fs *);
240
241 #endif /* _BCACHEFS_INODE_H */
242