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https://github.com/koverstreet/bcachefs-tools.git
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60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_COMPRESS_H
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#define _BCACHEFS_COMPRESS_H
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#include "extents_types.h"
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static const unsigned __bch2_compression_opt_to_type[] = {
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#define x(t, n) [BCH_COMPRESSION_OPT_##t] = BCH_COMPRESSION_TYPE_##t,
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BCH_COMPRESSION_OPTS()
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#undef x
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};
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union bch_compression_opt {
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u8 value;
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struct {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u8 type:4, level:4;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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u8 level:4, type:4;
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#endif
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};
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};
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static inline bool bch2_compression_opt_valid(unsigned v)
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{
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union bch_compression_opt opt = { .value = v };
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return opt.type < ARRAY_SIZE(__bch2_compression_opt_to_type) && !(!opt.type && opt.level);
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}
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static inline enum bch_compression_type bch2_compression_opt_to_type(unsigned v)
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{
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return __bch2_compression_opt_to_type[((union bch_compression_opt){ .value = v }).type];
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}
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struct bch_write_op;
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int bch2_bio_uncompress_inplace(struct bch_write_op *, struct bio *);
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int bch2_bio_uncompress(struct bch_fs *, struct bio *, struct bio *,
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struct bvec_iter, struct bch_extent_crc_unpacked);
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unsigned bch2_bio_compress(struct bch_fs *, struct bio *, size_t *,
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struct bio *, size_t *, unsigned);
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int bch2_check_set_has_compressed_data(struct bch_fs *, unsigned);
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void bch2_fs_compress_exit(struct bch_fs *);
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int bch2_fs_compress_init(struct bch_fs *);
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void bch2_compression_opt_to_text(struct printbuf *, u64);
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int bch2_opt_compression_parse(struct bch_fs *, const char *, u64 *, struct printbuf *);
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void bch2_opt_compression_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *, u64);
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int bch2_opt_compression_validate(u64, struct printbuf *);
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#define bch2_opt_compression (struct bch_opt_fn) { \
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.parse = bch2_opt_compression_parse, \
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.to_text = bch2_opt_compression_to_text, \
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.validate = bch2_opt_compression_validate, \
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}
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#endif /* _BCACHEFS_COMPRESS_H */
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