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
50static inline void bch2_prt_compression_type(struct printbuf *out, enum bch_compression_type type)
51{
52	if (type < BCH_COMPRESSION_TYPE_NR)
53		prt_str(out, __bch2_compression_types[type]);
54	else
55		prt_printf(out, "(invalid compression type %u)", type);
56}
57
58int bch2_bio_uncompress_inplace(struct bch_fs *, struct bio *,
59				struct bch_extent_crc_unpacked *);
60int bch2_bio_uncompress(struct bch_fs *, struct bio *, struct bio *,
61		       struct bvec_iter, struct bch_extent_crc_unpacked);
62unsigned bch2_bio_compress(struct bch_fs *, struct bio *, size_t *,
63			   struct bio *, size_t *, unsigned);
64
65int bch2_check_set_has_compressed_data(struct bch_fs *, unsigned);
66void bch2_fs_compress_exit(struct bch_fs *);
67int bch2_fs_compress_init(struct bch_fs *);
68
69void bch2_compression_opt_to_text(struct printbuf *, u64);
70
71int bch2_opt_compression_parse(struct bch_fs *, const char *, u64 *, struct printbuf *);
72void bch2_opt_compression_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *, u64);
73int bch2_opt_compression_validate(u64, struct printbuf *);
74
75#define bch2_opt_compression (struct bch_opt_fn) {		\
76	.parse		= bch2_opt_compression_parse,		\
77	.to_text	= bch2_opt_compression_to_text,		\
78	.validate	= bch2_opt_compression_validate,	\
79}
80
81#endif /* _BCACHEFS_COMPRESS_H */