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