Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
8struct bkey_buf {
9 struct bkey_i *k;
10 u64 onstack[12];
11};
12
13static 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
23static 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
31static 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
39static 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
49static inline void bch2_bkey_buf_init(struct bkey_buf *s)
50{
51 s->k = (void *) s->onstack;
52}
53
54static 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 */