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Linux kernel mirror (for testing)
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linux
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
10extern const char * const bch2_inode_opts[];
11
12int bch2_inode_validate(struct bch_fs *, struct bkey_s_c,
13 struct bkey_validate_context);
14int bch2_inode_v2_validate(struct bch_fs *, struct bkey_s_c,
15 struct bkey_validate_context);
16int bch2_inode_v3_validate(struct bch_fs *, struct bkey_s_c,
17 struct bkey_validate_context);
18void bch2_inode_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
19
20int __bch2_inode_has_child_snapshots(struct btree_trans *, struct bpos);
21
22static 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
29int 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
54static 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
61int bch2_inode_generation_validate(struct bch_fs *, struct bkey_s_c,
62 struct bkey_validate_context);
63void 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
71int bch2_inode_alloc_cursor_validate(struct bch_fs *, struct bkey_s_c,
72 struct bkey_validate_context);
73void 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
82typedef struct {
83 u64 lo;
84 u32 hi;
85} __packed __aligned(4) u96;
86#endif
87typedef u64 u96;
88
89struct 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};
104BITMASK(INODE_STR_HASH, struct bch_inode_unpacked, bi_flags, 20, 24);
105
106struct 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
114void bch2_inode_pack(struct bkey_inode_buf *, const struct bch_inode_unpacked *);
115int bch2_inode_unpack(struct bkey_s_c, struct bch_inode_unpacked *);
116struct bkey_i *bch2_inode_to_v3(struct btree_trans *, struct bkey_i *);
117
118void bch2_inode_unpacked_to_text(struct printbuf *, struct bch_inode_unpacked *);
119
120int __bch2_inode_peek(struct btree_trans *, struct btree_iter *,
121 struct bch_inode_unpacked *, subvol_inum, unsigned, bool);
122
123static 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
131static 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}
138
139int bch2_inode_find_by_inum_snapshot(struct btree_trans *, u64, u32,
140 struct bch_inode_unpacked *, unsigned);
141int bch2_inode_find_by_inum_nowarn_trans(struct btree_trans *,
142 subvol_inum,
143 struct bch_inode_unpacked *);
144int bch2_inode_find_by_inum_trans(struct btree_trans *, subvol_inum,
145 struct bch_inode_unpacked *);
146int bch2_inode_find_by_inum(struct bch_fs *, subvol_inum,
147 struct bch_inode_unpacked *);
148
149int bch2_inode_find_snapshot_root(struct btree_trans *trans, u64 inum,
150 struct bch_inode_unpacked *root);
151
152int bch2_inode_write_flags(struct btree_trans *, struct btree_iter *,
153 struct bch_inode_unpacked *, enum btree_iter_update_trigger_flags);
154
155static inline int bch2_inode_write(struct btree_trans *trans,
156 struct btree_iter *iter,
157 struct bch_inode_unpacked *inode)
158{
159 return bch2_inode_write_flags(trans, iter, inode, 0);
160}
161
162int __bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *);
163int bch2_fsck_write_inode(struct btree_trans *, struct bch_inode_unpacked *);
164
165void bch2_inode_init_early(struct bch_fs *,
166 struct bch_inode_unpacked *);
167void bch2_inode_init_late(struct bch_fs *, struct bch_inode_unpacked *, u64,
168 uid_t, gid_t, umode_t, dev_t,
169 struct bch_inode_unpacked *);
170void bch2_inode_init(struct bch_fs *, struct bch_inode_unpacked *,
171 uid_t, gid_t, umode_t, dev_t,
172 struct bch_inode_unpacked *);
173
174int bch2_inode_create(struct btree_trans *, struct btree_iter *,
175 struct bch_inode_unpacked *, u32, u64);
176
177int bch2_inode_rm(struct bch_fs *, subvol_inum);
178
179#define inode_opt_get(_c, _inode, _name) \
180 ((_inode)->bi_##_name ? (_inode)->bi_##_name - 1 : (_c)->opts._name)
181
182static inline void bch2_inode_opt_set(struct bch_inode_unpacked *inode,
183 enum inode_opt_id id, u64 v)
184{
185 switch (id) {
186#define x(_name, ...) \
187 case Inode_opt_##_name: \
188 inode->bi_##_name = v; \
189 break;
190 BCH_INODE_OPTS()
191#undef x
192 default:
193 BUG();
194 }
195}
196
197static inline u64 bch2_inode_opt_get(struct bch_inode_unpacked *inode,
198 enum inode_opt_id id)
199{
200 switch (id) {
201#define x(_name, ...) \
202 case Inode_opt_##_name: \
203 return inode->bi_##_name;
204 BCH_INODE_OPTS()
205#undef x
206 default:
207 BUG();
208 }
209}
210
211static inline u8 mode_to_type(umode_t mode)
212{
213 return (mode >> 12) & 15;
214}
215
216static inline u8 inode_d_type(struct bch_inode_unpacked *inode)
217{
218 return inode->bi_subvol ? DT_SUBVOL : mode_to_type(inode->bi_mode);
219}
220
221static inline u32 bch2_inode_flags(struct bkey_s_c k)
222{
223 switch (k.k->type) {
224 case KEY_TYPE_inode:
225 return le32_to_cpu(bkey_s_c_to_inode(k).v->bi_flags);
226 case KEY_TYPE_inode_v2:
227 return le64_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_flags);
228 case KEY_TYPE_inode_v3:
229 return le64_to_cpu(bkey_s_c_to_inode_v3(k).v->bi_flags);
230 default:
231 return 0;
232 }
233}
234
235static inline unsigned bkey_inode_mode(struct bkey_s_c k)
236{
237 switch (k.k->type) {
238 case KEY_TYPE_inode:
239 return le16_to_cpu(bkey_s_c_to_inode(k).v->bi_mode);
240 case KEY_TYPE_inode_v2:
241 return le16_to_cpu(bkey_s_c_to_inode_v2(k).v->bi_mode);
242 case KEY_TYPE_inode_v3:
243 return INODEv3_MODE(bkey_s_c_to_inode_v3(k).v);
244 default:
245 return 0;
246 }
247}
248
249static inline bool bch2_inode_casefold(struct bch_fs *c, const struct bch_inode_unpacked *bi)
250{
251 /* inode opts are stored with a +1 bias: 0 means "unset, use fs opt" */
252 return bi->bi_casefold
253 ? bi->bi_casefold - 1
254 : c->opts.casefold;
255}
256
257static inline bool bch2_inode_has_backpointer(const struct bch_inode_unpacked *bi)
258{
259 return bi->bi_dir || bi->bi_dir_offset;
260}
261
262/* i_nlink: */
263
264static inline unsigned nlink_bias(umode_t mode)
265{
266 return S_ISDIR(mode) ? 2 : 1;
267}
268
269static inline unsigned bch2_inode_nlink_get(struct bch_inode_unpacked *bi)
270{
271 return bi->bi_flags & BCH_INODE_unlinked
272 ? 0
273 : bi->bi_nlink + nlink_bias(bi->bi_mode);
274}
275
276static inline void bch2_inode_nlink_set(struct bch_inode_unpacked *bi,
277 unsigned nlink)
278{
279 if (nlink) {
280 bi->bi_nlink = nlink - nlink_bias(bi->bi_mode);
281 bi->bi_flags &= ~BCH_INODE_unlinked;
282 } else {
283 bi->bi_nlink = 0;
284 bi->bi_flags |= BCH_INODE_unlinked;
285 }
286}
287
288int bch2_inode_nlink_inc(struct bch_inode_unpacked *);
289void bch2_inode_nlink_dec(struct btree_trans *, struct bch_inode_unpacked *);
290
291struct bch_opts bch2_inode_opts_to_opts(struct bch_inode_unpacked *);
292void bch2_inode_opts_get(struct bch_io_opts *, struct bch_fs *,
293 struct bch_inode_unpacked *);
294int bch2_inum_opts_get(struct btree_trans *, subvol_inum, struct bch_io_opts *);
295int bch2_inode_set_casefold(struct btree_trans *, subvol_inum,
296 struct bch_inode_unpacked *, unsigned);
297
298#include "rebalance.h"
299
300static inline struct bch_extent_rebalance
301bch2_inode_rebalance_opts_get(struct bch_fs *c, struct bch_inode_unpacked *inode)
302{
303 struct bch_io_opts io_opts;
304 bch2_inode_opts_get(&io_opts, c, inode);
305 return io_opts_to_rebalance_opts(c, &io_opts);
306}
307
308#define BCACHEFS_ROOT_SUBVOL_INUM \
309 ((subvol_inum) { BCACHEFS_ROOT_SUBVOL, BCACHEFS_ROOT_INO })
310
311static inline bool subvol_inum_eq(subvol_inum a, subvol_inum b)
312{
313 return a.subvol == b.subvol && a.inum == b.inum;
314}
315
316int bch2_inode_rm_snapshot(struct btree_trans *, u64, u32);
317int bch2_delete_dead_inodes(struct bch_fs *);
318
319#endif /* _BCACHEFS_INODE_H */