Merge branch 'for-6.9/amd-sfh' into for-linus
[sfrench/cifs-2.6.git] / fs / bcachefs / compress.h
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 static 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
58 int bch2_bio_uncompress_inplace(struct bch_fs *, struct bio *,
59                                 struct bch_extent_crc_unpacked *);
60 int bch2_bio_uncompress(struct bch_fs *, struct bio *, struct bio *,
61                        struct bvec_iter, struct bch_extent_crc_unpacked);
62 unsigned bch2_bio_compress(struct bch_fs *, struct bio *, size_t *,
63                            struct bio *, size_t *, unsigned);
64
65 int bch2_check_set_has_compressed_data(struct bch_fs *, unsigned);
66 void bch2_fs_compress_exit(struct bch_fs *);
67 int bch2_fs_compress_init(struct bch_fs *);
68
69 void bch2_compression_opt_to_text(struct printbuf *, u64);
70
71 int bch2_opt_compression_parse(struct bch_fs *, const char *, u64 *, struct printbuf *);
72 void bch2_opt_compression_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *, u64);
73 int 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 */