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 #include "snapshot.h"
9
10 extern const char * const bch2_inode_opts[];
11
12 int bch2_inode_validate(struct bch_fs *, struct bkey_s_c,
13 struct bkey_validate_context);
14 int bch2_inode_v2_validate(struct bch_fs *, struct bkey_s_c,
15 struct bkey_validate_context);
16 int bch2_inode_v3_validate(struct bch_fs *, struct bkey_s_c,
17 struct bkey_validate_context);
18 void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
19
20 int __bch2_inode_has_child_snapshots(struct btree_trans *, struct bpos);
21
bch2_inode_has_child_snapshots(struct btree_trans * trans,struct bpos pos)22 static inline int bch2_inode_has_child_snapshots(struct btree_trans *trans, struct bpos pos)
23 {
24 return bch2_snapshot_is_leaf(trans->c, pos.snapshot) <= 0
25 ? __bch2_inode_has_child_snapshots(trans, pos)
26 : 0;
27 }
28
29 int bch2_trigger_inode(struct btree_trans *, enum btree_id, unsigned,
30 struct bkey_s_c, struct bkey_s,
31 enum btree_iter_update_trigger_flags);
32
33 #define bch2_bkey_ops_inode ((struct bkey_ops) { \
34 .key_validate = bch2_inode_validate, \
35 .val_to_text = bch2_inode_to_text, \
36 .trigger = bch2_trigger_inode, \
37 .min_val_size = 16, \
38 })
39
40 #define bch2_bkey_ops_inode_v2 ((struct bkey_ops) { \
41 .key_validate = bch2_inode_v2_validate, \
42 .val_to_text = bch2_inode_to_text, \
43 .trigger = bch2_trigger_inode, \
44 .min_val_size = 32, \
45 })
46
47 #define bch2_bkey_ops_inode_v3 ((struct bkey_ops) { \
48 .key_validate = bch2_inode_v3_validate, \
49 .val_to_text = bch2_inode_to_text, \
50 .trigger = bch2_trigger_inode, \
51 .min_val_size = 48, \
52 })
53
bkey_is_inode(const struct bkey * k)54 static inline bool bkey_is_inode(const struct bkey *k)
55 {
56 return k->type == KEY_TYPE_inode ||
57 k->type == KEY_TYPE_inode_v2 ||
58 k->type == KEY_TYPE_inode_v3;
59 }
60
61 int bch2_inode_generation_validate(struct bch_fs *, struct bkey_s_c,
62 struct bkey_validate_context);
63 void bch2_inode_generation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
64
65 #define bch2_bkey_ops_inode_generation ((struct bkey_ops) { \
66 .key_validate = bch2_inode_generation_validate, \
67 .val_to_text = bch2_inode_generation_to_text, \
68 .min_val_size = 8, \
69 })
70
71 int bch2_inode_alloc_cursor_validate(struct bch_fs *, struct bkey_s_c,
72 struct bkey_validate_context);
73 void bch2_inode_alloc_cursor_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
74
75 #define bch2_bkey_ops_inode_alloc_cursor ((struct bkey_ops) { \
76 .key_validate = bch2_inode_alloc_cursor_validate, \
77 .val_to_text = bch2_inode_alloc_cursor_to_text, \
78 .min_val_size = 16, \
79 })
80
81 #if 0
82 typedef struct {
83 u64 lo;
84 u32 hi;
85 } __packed __aligned(4) u96;
86 #endif
87 typedef u64 u96;
88
89 struct bch_inode_unpacked {
90 u64 bi_inum;
91 u32 bi_snapshot;
92 u64 bi_journal_seq;
93 __le64 bi_hash_seed;
94 u64 bi_size;
95 u64 bi_sectors;
96 u64 bi_version;
97 u32 bi_flags;
98 u16 bi_mode;
99
100 #define x(_name, _bits) u##_bits _name;
101 BCH_INODE_FIELDS_v3()
102 #undef x
103 };
104 BITMASK(INODE_STR_HASH, struct bch_inode_unpacked, bi_flags, 20, 24);
105
106 struct bkey_inode_buf {
107 struct bkey_i_inode_v3 inode;
108
109 #define x(_name, _bits) + 8 + _bits / 8
110 u8 _pad[0 + BCH_INODE_FIELDS_v3()];
111 #undef x
112 };
113
114 void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *);
115 int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *);
116 struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *);
117
118 void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *);
119
120 int __bch2_inode_peek(struct btree_trans *, struct btree_iter *,
121 struct bch_inode_unpacked *, subvol_inum, unsigned, bool);
122
bch2_inode_peek_nowarn(struct btree_trans * trans,struct btree_iter * iter,struct bch_inode_unpacked * inode,subvol_inum inum,unsigned flags)123 static inline int bch2_inode_peek_nowarn(struct btree_trans *trans,
124 struct btree_iter *iter,
125 struct bch_inode_unpacked *inode,
126 subvol_inum inum, unsigned flags)
127 {
128 return __bch2_inode_peek(trans, iter, inode, inum, flags, false);
129 }
130
bch2_inode_peek(struct btree_trans * trans,struct btree_iter * iter,struct bch_inode_unpacked * inode,subvol_inum inum,unsigned flags)131 static inline int bch2_inode_peek(struct btree_trans *trans,
132 struct btree_iter *iter,
133 struct bch_inode_unpacked *inode,
134 subvol_inum inum, unsigned flags)
135 {
136 return __bch2_inode_peek(trans, iter, inode, inum, flags, true);
137 int ret = bch2_inode_peek_nowarn(trans, iter, inode, inum, flags);
138 return ret;
139 }
140
141 int bch2_inode_write_flags(struct btree_trans *, struct btree_iter *,
142 struct bch_inode_unpacked *, enum btree_iter_update_trigger_flags);
143
bch2_inode_write(struct btree_trans * trans,struct btree_iter * iter,struct bch_inode_unpacked * inode)144 static inline int bch2_inode_write(struct btree_trans *trans,
145 struct btree_iter *iter,
146 struct bch_inode_unpacked *inode)
147 {
148 return bch2_inode_write_flags(trans, iter, inode, 0);
149 }
150
151 int __bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *);
152 int bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *);
153
154 void bch2_inode_init_early(struct bch_fs *,
155 struct bch_inode_unpacked *);
156 void bch2_inode_init_late(struct bch_inode_unpacked *, u64,
157 uid_t, gid_t, umode_t, dev_t,
158 struct bch_inode_unpacked *);
159 void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *,
160 uid_t, gid_t, umode_t, dev_t,
161 struct bch_inode_unpacked *);
162
163 int bch2_inode_create(struct btree_trans *, struct btree_iter *,
164 struct bch_inode_unpacked *, u32, u64);
165
166 int bch2_inode_rm(struct bch_fs *, subvol_inum);
167
168 int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *,
169 subvol_inum,
170 struct bch_inode_unpacked *);
171 int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum,
172 struct bch_inode_unpacked *);
173 int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum,
174 struct bch_inode_unpacked *);
175
176 #define inode_opt_get(_c, _inode, _name) \
177 ((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name)
178
bch2_inode_opt_set(struct bch_inode_unpacked * inode,enum inode_opt_id id,u64 v)179 static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode,
180 enum inode_opt_id id, u64 v)
181 {
182 switch (id) {
183 #define x(_name, ...) \
184 case Inode_opt_##_name: \
185 inode->bi_##_name = v; \
186 break;
187 BCH_INODE_OPTS()
188 #undef x
189 default:
190 BUG();
191 }
192 }
193
bch2_inode_opt_get(struct bch_inode_unpacked * inode,enum inode_opt_id id)194 static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode,
195 enum inode_opt_id id)
196 {
197 switch (id) {
198 #define x(_name, ...) \
199 case Inode_opt_##_name: \
200 return inode->bi_##_name;
201 BCH_INODE_OPTS()
202 #undef x
203 default:
204 BUG();
205 }
206 }
207
mode_to_type(umode_t mode)208 static inline u8 mode_to_type(umode_t mode)
209 {
210 return (mode >> 12) & 15;
211 }
212
inode_d_type(struct bch_inode_unpacked * inode)213 static inline u8 inode_d_type(struct bch_inode_unpacked *inode)
214 {
215 return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode);
216 }
217
bch2_inode_flags(struct bkey_s_c k)218 static inline u32 bch2_inode_flags(struct bkey_s_c k)
219 {
220 switch (k.k->type) {
221 case KEY_TYPE_inode:
222 return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags);
223 case KEY_TYPE_inode_v2:
224 return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags);
225 case KEY_TYPE_inode_v3:
226 return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags);
227 default:
228 return 0;
229 }
230 }
231
bkey_inode_mode(struct bkey_s_c k)232 static inline unsigned bkey_inode_mode(struct bkey_s_c k)
233 {
234 switch (k.k->type) {
235 case KEY_TYPE_inode:
236 return le16_to_cpu(bkey_s_c_to_inode(k).v->bi_mode);
237 case KEY_TYPE_inode_v2:
238 return le16_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_mode);
239 case KEY_TYPE_inode_v3:
240 return INODEv3_MODE(bkey_s_c_to_inode_v3(k).v);
241 default:
242 return 0;
243 }
244 }
245
246 /* i_nlink: */
247
nlink_bias(umode_t mode)248 static inline unsigned nlink_bias(umode_t mode)
249 {
250 return S_ISDIR(mode) ? 2 : 1;
251 }
252
bch2_inode_nlink_get(struct bch_inode_unpacked * bi)253 static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi)
254 {
255 return bi->bi_flags & BCH_INODE_unlinked
256 ? 0
257 : bi->bi_nlink + nlink_bias(bi->bi_mode);
258 }
259
bch2_inode_nlink_set(struct bch_inode_unpacked * bi,unsigned nlink)260 static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi,
261 unsigned nlink)
262 {
263 if (nlink) {
264 bi->bi_nlink = nlink - nlink_bias(bi->bi_mode);
265 bi->bi_flags &= ~BCH_INODE_unlinked;
266 } else {
267 bi->bi_nlink = 0;
268 bi->bi_flags |= BCH_INODE_unlinked;
269 }
270 }
271
272 int bch2_inode_nlink_inc(struct bch_inode_unpacked *);
273 void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *);
274
bch2_inode_should_have_single_bp(struct bch_inode_unpacked * inode)275 static inline bool bch2_inode_should_have_single_bp(struct bch_inode_unpacked *inode)
276 {
277 bool inode_has_bp = inode->bi_dir || inode->bi_dir_offset;
278
279 return S_ISDIR(inode->bi_mode) ||
280 (!inode->bi_nlink && inode_has_bp);
281 }
282
283 struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *);
284 void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *,
285 struct bch_inode_unpacked *);
286 int bch2_inum_opts_get(struct btree_trans*, subvol_inum, struct bch_io_opts *);
287
288 #include "rebalance.h"
289
290 static inline struct bch_extent_rebalance
bch2_inode_rebalance_opts_get(struct bch_fs * c,struct bch_inode_unpacked * inode)291 bch2_inode_rebalance_opts_get(struct bch_fs *c, struct bch_inode_unpacked *inode)
292 {
293 struct bch_io_opts io_opts;
294 bch2_inode_opts_get(&io_opts, c, inode);
295 return io_opts_to_rebalance_opts(c, &io_opts);
296 }
297
298 int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32);
299 int bch2_delete_dead_inodes(struct bch_fs *);
300
301 #endif /* _BCACHEFS_INODE_H */
302