1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _BCACHEFS_COMPRESS_H 3 #define _BCACHEFS_COMPRESS_H 4 5 #include "extents_types.h" 6 7 static 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 x 11 }; 12 13 struct bch_compression_opt { 14 u8 type:4, 15 level:4; 16 }; 17 18 static 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 26 static 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 33 static 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 40 static inline unsigned bch2_compression_encode(struct bch_compression_opt opt) 41 { 42 return opt.type|(opt.level << 4); 43 } 44 45 static 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 50 int bch2_bio_uncompress_inplace(struct bch_fs *, struct bio *, 51 struct bch_extent_crc_unpacked *); 52 int bch2_bio_uncompress(struct bch_fs *, struct bio *, struct bio *, 53 struct bvec_iter, struct bch_extent_crc_unpacked); 54 unsigned bch2_bio_compress(struct bch_fs *, struct bio *, size_t *, 55 struct bio *, size_t *, unsigned); 56 57 int bch2_check_set_has_compressed_data(struct bch_fs *, unsigned); 58 void bch2_fs_compress_exit(struct bch_fs *); 59 int bch2_fs_compress_init(struct bch_fs *); 60 61 void bch2_compression_opt_to_text(struct printbuf *, u64); 62 63 int bch2_opt_compression_parse(struct bch_fs *, const char *, u64 *, struct printbuf *); 64 void bch2_opt_compression_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *, u64); 65 int 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