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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _BCACHEFS_COMPRESS_H3#define _BCACHEFS_COMPRESS_H4 5#include "extents_types.h"6 7static const unsigned __bch2_compression_opt_to_type[] = {8#define x(t, n) [BCH_COMPRESSION_OPT_##t] = BCH_COMPRESSION_TYPE_##t,9 BCH_COMPRESSION_OPTS()10#undef x11};12 13struct bch_compression_opt {14 u8 type:4,15 level:4;16};17 18static inline struct bch_compression_opt __bch2_compression_decode(unsigned v)19{20 return (struct bch_compression_opt) {21 .type = v & 15,22 .level = v >> 4,23 };24}25 26static inline bool bch2_compression_opt_valid(unsigned v)27{28 struct bch_compression_opt opt = __bch2_compression_decode(v);29 30 return opt.type < ARRAY_SIZE(__bch2_compression_opt_to_type) && !(!opt.type && opt.level);31}32 33static inline struct bch_compression_opt bch2_compression_decode(unsigned v)34{35 return bch2_compression_opt_valid(v)36 ? __bch2_compression_decode(v)37 : (struct bch_compression_opt) { 0 };38}39 40static inline unsigned bch2_compression_encode(struct bch_compression_opt opt)41{42 return opt.type|(opt.level << 4);43}44 45static inline enum bch_compression_type bch2_compression_opt_to_type(unsigned v)46{47 return __bch2_compression_opt_to_type[bch2_compression_decode(v).type];48}49 50int bch2_bio_uncompress_inplace(struct bch_fs *, struct bio *,51 struct bch_extent_crc_unpacked *);52int bch2_bio_uncompress(struct bch_fs *, struct bio *, struct bio *,53 struct bvec_iter, struct bch_extent_crc_unpacked);54unsigned bch2_bio_compress(struct bch_fs *, struct bio *, size_t *,55 struct bio *, size_t *, unsigned);56 57int bch2_check_set_has_compressed_data(struct bch_fs *, unsigned);58void bch2_fs_compress_exit(struct bch_fs *);59int bch2_fs_compress_init(struct bch_fs *);60 61void bch2_compression_opt_to_text(struct printbuf *, u64);62 63int bch2_opt_compression_parse(struct bch_fs *, const char *, u64 *, struct printbuf *);64void bch2_opt_compression_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *, u64);65int bch2_opt_compression_validate(u64, struct printbuf *);66 67#define bch2_opt_compression (struct bch_opt_fn) { \68 .parse = bch2_opt_compression_parse, \69 .to_text = bch2_opt_compression_to_text, \70 .validate = bch2_opt_compression_validate, \71}72 73#endif /* _BCACHEFS_COMPRESS_H */74