xref: /openbmc/linux/drivers/md/bcache/features.h (revision cf2197ca)
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