projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 07a1006a KO |
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 | ||
| 7 | struct bkey_buf { | |
| 8 | struct bkey_i *k; | |
| 9 | u64 onstack[12]; | |
| 10 | }; | |
| 11 | ||
| 12 | static inline void bch2_bkey_buf_realloc(struct bkey_buf *s, | |
| 13 | struct bch_fs *c, unsigned u64s) | |
| 14 | { | |
| 15 | if (s->k == (void *) s->onstack && | |
| 16 | u64s > ARRAY_SIZE(s->onstack)) { | |
| 17 | s->k = mempool_alloc(&c->large_bkey_pool, GFP_NOFS); | |
| 18 | memcpy(s->k, s->onstack, sizeof(s->onstack)); | |
| 19 | } | |
| 20 | } | |
| 21 | ||
| 22 | static inline void bch2_bkey_buf_reassemble(struct bkey_buf *s, | |
| 23 | struct bch_fs *c, | |
| 24 | struct bkey_s_c k) | |
| 25 | { | |
| 26 | bch2_bkey_buf_realloc(s, c, k.k->u64s); | |
| 27 | bkey_reassemble(s->k, k); | |
| 28 | } | |
| 29 | ||
| 30 | static inline void bch2_bkey_buf_copy(struct bkey_buf *s, | |
| 31 | struct bch_fs *c, | |
| 32 | struct bkey_i *src) | |
| 33 | { | |
| 34 | bch2_bkey_buf_realloc(s, c, src->k.u64s); | |
| 35 | bkey_copy(s->k, src); | |
| 36 | } | |
| 37 | ||
| 38 | static inline void bch2_bkey_buf_unpack(struct bkey_buf *s, | |
| 39 | struct bch_fs *c, | |
| 40 | struct btree *b, | |
| 41 | struct bkey_packed *src) | |
| 42 | { | |
| 43 | bch2_bkey_buf_realloc(s, c, BKEY_U64s + | |
| 44 | bkeyp_val_u64s(&b->format, src)); | |
| 45 | bch2_bkey_unpack(b, s->k, src); | |
| 46 | } | |
| 47 | ||
| 48 | static inline void bch2_bkey_buf_init(struct bkey_buf *s) | |
| 49 | { | |
| 50 | s->k = (void *) s->onstack; | |
| 51 | } | |
| 52 | ||
| 53 | static inline void bch2_bkey_buf_exit(struct bkey_buf *s, struct bch_fs *c) | |
| 54 | { | |
| 55 | if (s->k != (void *) s->onstack) | |
| 56 | mempool_free(s->k, &c->large_bkey_pool); | |
| 57 | s->k = NULL; | |
| 58 | } | |
| 59 | ||
| 60 | #endif /* _BCACHEFS_BKEY_BUF_H */ |