1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
2 | #ifndef _BCACHE_FEATURES_H |
3 | #define _BCACHE_FEATURES_H |
4 | |
5 | #include <linux/kernel.h> |
6 | #include <linux/types.h> |
7 | |
8 | #include "bcache_ondisk.h" |
9 | |
10 | #define BCH_FEATURE_COMPAT 0 |
11 | #define BCH_FEATURE_RO_COMPAT 1 |
12 | #define BCH_FEATURE_INCOMPAT 2 |
13 | #define BCH_FEATURE_TYPE_MASK 0x03 |
14 | |
15 | /* Feature set definition */ |
16 | /* Incompat feature set */ |
17 | /* 32bit bucket size, obsoleted */ |
18 | #define BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET 0x0001 |
19 | /* real bucket size is (1 << bucket_size) */ |
20 | #define BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE 0x0002 |
21 | |
22 | #define BCH_FEATURE_COMPAT_SUPP 0 |
23 | #define BCH_FEATURE_RO_COMPAT_SUPP 0 |
24 | #define BCH_FEATURE_INCOMPAT_SUPP (BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET| \ |
25 | BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE) |
26 | |
27 | #define BCH_HAS_COMPAT_FEATURE(sb, mask) \ |
28 | ((sb)->feature_compat & (mask)) |
29 | #define BCH_HAS_RO_COMPAT_FEATURE(sb, mask) \ |
30 | ((sb)->feature_ro_compat & (mask)) |
31 | #define BCH_HAS_INCOMPAT_FEATURE(sb, mask) \ |
32 | ((sb)->feature_incompat & (mask)) |
33 | |
34 | #define BCH_FEATURE_COMPAT_FUNCS(name, flagname) \ |
35 | static inline int bch_has_feature_##name(struct cache_sb *sb) \ |
36 | { \ |
37 | if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \ |
38 | return 0; \ |
39 | return (((sb)->feature_compat & \ |
40 | BCH##_FEATURE_COMPAT_##flagname) != 0); \ |
41 | } \ |
42 | static inline void bch_set_feature_##name(struct cache_sb *sb) \ |
43 | { \ |
44 | (sb)->feature_compat |= \ |
45 | BCH##_FEATURE_COMPAT_##flagname; \ |
46 | } \ |
47 | static inline void bch_clear_feature_##name(struct cache_sb *sb) \ |
48 | { \ |
49 | (sb)->feature_compat &= \ |
50 | ~BCH##_FEATURE_COMPAT_##flagname; \ |
51 | } |
52 | |
53 | #define BCH_FEATURE_RO_COMPAT_FUNCS(name, flagname) \ |
54 | static inline int bch_has_feature_##name(struct cache_sb *sb) \ |
55 | { \ |
56 | if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \ |
57 | return 0; \ |
58 | return (((sb)->feature_ro_compat & \ |
59 | BCH##_FEATURE_RO_COMPAT_##flagname) != 0); \ |
60 | } \ |
61 | static inline void bch_set_feature_##name(struct cache_sb *sb) \ |
62 | { \ |
63 | (sb)->feature_ro_compat |= \ |
64 | BCH##_FEATURE_RO_COMPAT_##flagname; \ |
65 | } \ |
66 | static inline void bch_clear_feature_##name(struct cache_sb *sb) \ |
67 | { \ |
68 | (sb)->feature_ro_compat &= \ |
69 | ~BCH##_FEATURE_RO_COMPAT_##flagname; \ |
70 | } |
71 | |
72 | #define BCH_FEATURE_INCOMPAT_FUNCS(name, flagname) \ |
73 | static inline int bch_has_feature_##name(struct cache_sb *sb) \ |
74 | { \ |
75 | if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \ |
76 | return 0; \ |
77 | return (((sb)->feature_incompat & \ |
78 | BCH##_FEATURE_INCOMPAT_##flagname) != 0); \ |
79 | } \ |
80 | static inline void bch_set_feature_##name(struct cache_sb *sb) \ |
81 | { \ |
82 | (sb)->feature_incompat |= \ |
83 | BCH##_FEATURE_INCOMPAT_##flagname; \ |
84 | } \ |
85 | static inline void bch_clear_feature_##name(struct cache_sb *sb) \ |
86 | { \ |
87 | (sb)->feature_incompat &= \ |
88 | ~BCH##_FEATURE_INCOMPAT_##flagname; \ |
89 | } |
90 | |
91 | BCH_FEATURE_INCOMPAT_FUNCS(obso_large_bucket, OBSO_LARGE_BUCKET); |
92 | BCH_FEATURE_INCOMPAT_FUNCS(large_bucket, LOG_LARGE_BUCKET_SIZE); |
93 | |
94 | static inline bool bch_has_unknown_compat_features(struct cache_sb *sb) |
95 | { |
96 | return ((sb->feature_compat & ~BCH_FEATURE_COMPAT_SUPP) != 0); |
97 | } |
98 | |
99 | static inline bool bch_has_unknown_ro_compat_features(struct cache_sb *sb) |
100 | { |
101 | return ((sb->feature_ro_compat & ~BCH_FEATURE_RO_COMPAT_SUPP) != 0); |
102 | } |
103 | |
104 | static inline bool bch_has_unknown_incompat_features(struct cache_sb *sb) |
105 | { |
106 | return ((sb->feature_incompat & ~BCH_FEATURE_INCOMPAT_SUPP) != 0); |
107 | } |
108 | |
109 | int bch_print_cache_set_feature_compat(struct cache_set *c, char *buf, int size); |
110 | int bch_print_cache_set_feature_ro_compat(struct cache_set *c, char *buf, int size); |
111 | int bch_print_cache_set_feature_incompat(struct cache_set *c, char *buf, int size); |
112 | |
113 | #endif |
114 | |