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