Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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) \
34static 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} \
41static inline void bch_set_feature_##name(struct cache_sb *sb) \
42{ \
43 (sb)->feature_compat |= \
44 BCH##_FEATURE_COMPAT_##flagname; \
45} \
46static 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) \
53static 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} \
60static inline void bch_set_feature_##name(struct cache_sb *sb) \
61{ \
62 (sb)->feature_ro_compat |= \
63 BCH##_FEATURE_RO_COMPAT_##flagname; \
64} \
65static 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) \
72static 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} \
79static inline void bch_set_feature_##name(struct cache_sb *sb) \
80{ \
81 (sb)->feature_incompat |= \
82 BCH##_FEATURE_INCOMPAT_##flagname; \
83} \
84static inline void bch_clear_feature_##name(struct cache_sb *sb) \
85{ \
86 (sb)->feature_incompat &= \
87 ~BCH##_FEATURE_INCOMPAT_##flagname; \
88}
89
90BCH_FEATURE_INCOMPAT_FUNCS(obso_large_bucket, OBSO_LARGE_BUCKET);
91BCH_FEATURE_INCOMPAT_FUNCS(large_bucket, LOG_LARGE_BUCKET_SIZE);
92
93static inline bool bch_has_unknown_compat_features(struct cache_sb *sb)
94{
95 return ((sb->feature_compat & ~BCH_FEATURE_COMPAT_SUPP) != 0);
96}
97
98static 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
103static inline bool bch_has_unknown_incompat_features(struct cache_sb *sb)
104{
105 return ((sb->feature_incompat & ~BCH_FEATURE_INCOMPAT_SUPP) != 0);
106}
107
108int bch_print_cache_set_feature_compat(struct cache_set *c, char *buf, int size);
109int bch_print_cache_set_feature_ro_compat(struct cache_set *c, char *buf, int size);
110int bch_print_cache_set_feature_incompat(struct cache_set *c, char *buf, int size);
111
112#endif