1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2*4882a593Smuzhiyun #ifndef _BCACHE_FEATURES_H
3*4882a593Smuzhiyun #define _BCACHE_FEATURES_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/bcache.h>
6*4882a593Smuzhiyun #include <linux/kernel.h>
7*4882a593Smuzhiyun #include <linux/types.h>
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #define BCH_FEATURE_COMPAT 0
10*4882a593Smuzhiyun #define BCH_FEATURE_RO_COMPAT 1
11*4882a593Smuzhiyun #define BCH_FEATURE_INCOMPAT 2
12*4882a593Smuzhiyun #define BCH_FEATURE_TYPE_MASK 0x03
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun /* Feature set definition */
15*4882a593Smuzhiyun /* Incompat feature set */
16*4882a593Smuzhiyun /* 32bit bucket size, obsoleted */
17*4882a593Smuzhiyun #define BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET 0x0001
18*4882a593Smuzhiyun /* real bucket size is (1 << bucket_size) */
19*4882a593Smuzhiyun #define BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE 0x0002
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define BCH_FEATURE_COMPAT_SUPP 0
22*4882a593Smuzhiyun #define BCH_FEATURE_RO_COMPAT_SUPP 0
23*4882a593Smuzhiyun #define BCH_FEATURE_INCOMPAT_SUPP (BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET| \
24*4882a593Smuzhiyun BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE)
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #define BCH_HAS_COMPAT_FEATURE(sb, mask) \
27*4882a593Smuzhiyun ((sb)->feature_compat & (mask))
28*4882a593Smuzhiyun #define BCH_HAS_RO_COMPAT_FEATURE(sb, mask) \
29*4882a593Smuzhiyun ((sb)->feature_ro_compat & (mask))
30*4882a593Smuzhiyun #define BCH_HAS_INCOMPAT_FEATURE(sb, mask) \
31*4882a593Smuzhiyun ((sb)->feature_incompat & (mask))
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun #define BCH_FEATURE_COMPAT_FUNCS(name, flagname) \
34*4882a593Smuzhiyun static inline int bch_has_feature_##name(struct cache_sb *sb) \
35*4882a593Smuzhiyun { \
36*4882a593Smuzhiyun if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \
37*4882a593Smuzhiyun return 0; \
38*4882a593Smuzhiyun return (((sb)->feature_compat & \
39*4882a593Smuzhiyun BCH##_FEATURE_COMPAT_##flagname) != 0); \
40*4882a593Smuzhiyun } \
41*4882a593Smuzhiyun static inline void bch_set_feature_##name(struct cache_sb *sb) \
42*4882a593Smuzhiyun { \
43*4882a593Smuzhiyun (sb)->feature_compat |= \
44*4882a593Smuzhiyun BCH##_FEATURE_COMPAT_##flagname; \
45*4882a593Smuzhiyun } \
46*4882a593Smuzhiyun static inline void bch_clear_feature_##name(struct cache_sb *sb) \
47*4882a593Smuzhiyun { \
48*4882a593Smuzhiyun (sb)->feature_compat &= \
49*4882a593Smuzhiyun ~BCH##_FEATURE_COMPAT_##flagname; \
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun #define BCH_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
53*4882a593Smuzhiyun static inline int bch_has_feature_##name(struct cache_sb *sb) \
54*4882a593Smuzhiyun { \
55*4882a593Smuzhiyun if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \
56*4882a593Smuzhiyun return 0; \
57*4882a593Smuzhiyun return (((sb)->feature_ro_compat & \
58*4882a593Smuzhiyun BCH##_FEATURE_RO_COMPAT_##flagname) != 0); \
59*4882a593Smuzhiyun } \
60*4882a593Smuzhiyun static inline void bch_set_feature_##name(struct cache_sb *sb) \
61*4882a593Smuzhiyun { \
62*4882a593Smuzhiyun (sb)->feature_ro_compat |= \
63*4882a593Smuzhiyun BCH##_FEATURE_RO_COMPAT_##flagname; \
64*4882a593Smuzhiyun } \
65*4882a593Smuzhiyun static inline void bch_clear_feature_##name(struct cache_sb *sb) \
66*4882a593Smuzhiyun { \
67*4882a593Smuzhiyun (sb)->feature_ro_compat &= \
68*4882a593Smuzhiyun ~BCH##_FEATURE_RO_COMPAT_##flagname; \
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun #define BCH_FEATURE_INCOMPAT_FUNCS(name, flagname) \
72*4882a593Smuzhiyun static inline int bch_has_feature_##name(struct cache_sb *sb) \
73*4882a593Smuzhiyun { \
74*4882a593Smuzhiyun if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \
75*4882a593Smuzhiyun return 0; \
76*4882a593Smuzhiyun return (((sb)->feature_incompat & \
77*4882a593Smuzhiyun BCH##_FEATURE_INCOMPAT_##flagname) != 0); \
78*4882a593Smuzhiyun } \
79*4882a593Smuzhiyun static inline void bch_set_feature_##name(struct cache_sb *sb) \
80*4882a593Smuzhiyun { \
81*4882a593Smuzhiyun (sb)->feature_incompat |= \
82*4882a593Smuzhiyun BCH##_FEATURE_INCOMPAT_##flagname; \
83*4882a593Smuzhiyun } \
84*4882a593Smuzhiyun static inline void bch_clear_feature_##name(struct cache_sb *sb) \
85*4882a593Smuzhiyun { \
86*4882a593Smuzhiyun (sb)->feature_incompat &= \
87*4882a593Smuzhiyun ~BCH##_FEATURE_INCOMPAT_##flagname; \
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun BCH_FEATURE_INCOMPAT_FUNCS(obso_large_bucket, OBSO_LARGE_BUCKET);
91*4882a593Smuzhiyun BCH_FEATURE_INCOMPAT_FUNCS(large_bucket, LOG_LARGE_BUCKET_SIZE);
92*4882a593Smuzhiyun
bch_has_unknown_compat_features(struct cache_sb * sb)93*4882a593Smuzhiyun static inline bool bch_has_unknown_compat_features(struct cache_sb *sb)
94*4882a593Smuzhiyun {
95*4882a593Smuzhiyun return ((sb->feature_compat & ~BCH_FEATURE_COMPAT_SUPP) != 0);
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
bch_has_unknown_ro_compat_features(struct cache_sb * sb)98*4882a593Smuzhiyun static inline bool bch_has_unknown_ro_compat_features(struct cache_sb *sb)
99*4882a593Smuzhiyun {
100*4882a593Smuzhiyun return ((sb->feature_ro_compat & ~BCH_FEATURE_RO_COMPAT_SUPP) != 0);
101*4882a593Smuzhiyun }
102*4882a593Smuzhiyun
bch_has_unknown_incompat_features(struct cache_sb * sb)103*4882a593Smuzhiyun static inline bool bch_has_unknown_incompat_features(struct cache_sb *sb)
104*4882a593Smuzhiyun {
105*4882a593Smuzhiyun return ((sb->feature_incompat & ~BCH_FEATURE_INCOMPAT_SUPP) != 0);
106*4882a593Smuzhiyun }
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun int bch_print_cache_set_feature_compat(struct cache_set *c, char *buf, int size);
109*4882a593Smuzhiyun int bch_print_cache_set_feature_ro_compat(struct cache_set *c, char *buf, int size);
110*4882a593Smuzhiyun int bch_print_cache_set_feature_incompat(struct cache_set *c, char *buf, int size);
111*4882a593Smuzhiyun
112*4882a593Smuzhiyun #endif
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