| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _BCACHEFS_COMPRESS_H |
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| 3 | #define _BCACHEFS_COMPRESS_H |
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| 4 | |
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| 5 | #include "extents_types.h" |
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| 6 | |
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| 7 | static const unsigned __bch2_compression_opt_to_type[] = { |
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| 8 | #define x(t, n) [BCH_COMPRESSION_OPT_##t] = BCH_COMPRESSION_TYPE_##t, |
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| 9 | BCH_COMPRESSION_OPTS() |
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| 10 | #undef x |
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| 11 | }; |
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| 12 | |
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| 13 | struct bch_compression_opt { |
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| 14 | u8 type:4, |
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| 15 | level:4; |
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| 16 | }; |
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| 17 | |
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| 18 | static inline struct bch_compression_opt __bch2_compression_decode(unsigned v) |
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| 19 | { |
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| 20 | return (struct bch_compression_opt) { |
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| 21 | .type = v & 15, |
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| 22 | .level = v >> 4, |
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| 23 | }; |
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| 24 | } |
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| 25 | |
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| 26 | static inline bool bch2_compression_opt_valid(unsigned v) |
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| 27 | { |
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| 28 | struct bch_compression_opt opt = __bch2_compression_decode(v); |
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| 29 | |
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| 30 | return opt.type < ARRAY_SIZE(__bch2_compression_opt_to_type) && !(!opt.type && opt.level); |
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| 31 | } |
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| 32 | |
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| 33 | static inline struct bch_compression_opt bch2_compression_decode(unsigned v) |
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| 34 | { |
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| 35 | return bch2_compression_opt_valid(v) |
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| 36 | ? __bch2_compression_decode(v) |
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| 37 | : (struct bch_compression_opt) { 0 }; |
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| 38 | } |
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| 39 | |
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| 40 | static inline unsigned bch2_compression_encode(struct bch_compression_opt opt) |
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| 41 | { |
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| 42 | return opt.type|(opt.level << 4); |
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| 43 | } |
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| 44 | |
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| 45 | static inline enum bch_compression_type bch2_compression_opt_to_type(unsigned v) |
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| 46 | { |
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| 47 | return __bch2_compression_opt_to_type[bch2_compression_decode(v).type]; |
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| 48 | } |
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| 49 | |
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| 50 | int bch2_bio_uncompress_inplace(struct bch_fs *, struct bio *, |
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| 51 | struct bch_extent_crc_unpacked *); |
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| 52 | int bch2_bio_uncompress(struct bch_fs *, struct bio *, struct bio *, |
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| 53 | struct bvec_iter, struct bch_extent_crc_unpacked); |
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| 54 | unsigned bch2_bio_compress(struct bch_fs *, struct bio *, size_t *, |
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| 55 | struct bio *, size_t *, unsigned); |
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| 56 | |
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| 57 | int bch2_check_set_has_compressed_data(struct bch_fs *, unsigned); |
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| 58 | void bch2_fs_compress_exit(struct bch_fs *); |
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| 59 | int bch2_fs_compress_init(struct bch_fs *); |
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| 60 | |
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| 61 | void bch2_compression_opt_to_text(struct printbuf *, u64); |
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| 62 | |
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| 63 | int bch2_opt_compression_parse(struct bch_fs *, const char *, u64 *, struct printbuf *); |
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| 64 | void bch2_opt_compression_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *, u64); |
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| 65 | int bch2_opt_compression_validate(u64, struct printbuf *); |
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| 66 | |
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| 67 | #define bch2_opt_compression (struct bch_opt_fn) { \ |
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| 68 | .parse = bch2_opt_compression_parse, \ |
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| 69 | .to_text = bch2_opt_compression_to_text, \ |
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| 70 | .validate = bch2_opt_compression_validate, \ |
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| 71 | } |
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| 72 | |
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| 73 | #endif /* _BCACHEFS_COMPRESS_H */ |
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| 74 | |
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