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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _BCACHEFS_BKEY_BUF_H3#define _BCACHEFS_BKEY_BUF_H4 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 */62