1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_BKEY_BUF_H
3 #define _BCACHEFS_BKEY_BUF_H
4
5 #include "bcachefs.h"
6 #include "bkey.h"
7
8 struct bkey_buf {
9 struct bkey_i *k;
10 u64 onstack[12];
11 };
12
13 static inline void bch2_bkey_buf_realloc(struct bkey_buf *s,
14 struct bch_fs *c, unsigned u64s)
15 {
16 if (s->k == (void *) s->onstack &&
17 u64s > ARRAY_SIZE(s->onstack)) {
18 s->k = mempool_alloc(&c->large_bkey_pool, GFP_NOFS);
19 memcpy(s->k, s->onstack, sizeof(s->onstack));
20 }
21 }
22
23 static inline void bch2_bkey_buf_reassemble(struct bkey_buf *s,
24 struct bch_fs *c,
25 struct bkey_s_c k)
26 {
27 bch2_bkey_buf_realloc(s, c, k.k->u64s);
28 bkey_reassemble(s->k, k);
29 }
30
31 static inline void bch2_bkey_buf_copy(struct bkey_buf *s,
32 struct bch_fs *c,
33 struct bkey_i *src)
34 {
35 bch2_bkey_buf_realloc(s, c, src->k.u64s);
36 bkey_copy(s->k, src);
37 }
38
39 static inline void bch2_bkey_buf_unpack(struct bkey_buf *s,
40 struct bch_fs *c,
41 struct btree *b,
42 struct bkey_packed *src)
43 {
44 bch2_bkey_buf_realloc(s, c, BKEY_U64s +
45 bkeyp_val_u64s(&b->format, src));
46 bch2_bkey_unpack(b, s->k, src);
47 }
48
49 static inline void bch2_bkey_buf_init(struct bkey_buf *s)
50 {
51 s->k = (void *) s->onstack;
52 }
53
54 static inline void bch2_bkey_buf_exit(struct bkey_buf *s, struct bch_fs *c)
55 {
56 if (s->k != (void *) s->onstack)
57 mempool_free(s->k, &c->large_bkey_pool);
58 s->k = NULL;
59 }
60
61 #endif /* _BCACHEFS_BKEY_BUF_H */
62
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.