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
bch_has_unknown_compat_features(struct cache_sb * sb)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
bch_has_unknown_ro_compat_features(struct cache_sb * sb)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
bch_has_unknown_incompat_features(struct cache_sb * sb)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