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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_COMPRESS_H
3#define _BCACHEFS_COMPRESS_H
4
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 x
11};
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 */