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- /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
- #ifndef _BCACHE_FEATURES_H
- #define _BCACHE_FEATURES_H
- #include <linux/bcache.h>
- #include <linux/kernel.h>
- #include <linux/types.h>
- #define BCH_FEATURE_COMPAT 0
- #define BCH_FEATURE_RO_COMPAT 1
- #define BCH_FEATURE_INCOMPAT 2
- #define BCH_FEATURE_TYPE_MASK 0x03
- /* Feature set definition */
- /* Incompat feature set */
- /* 32bit bucket size, obsoleted */
- #define BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET 0x0001
- /* real bucket size is (1 << bucket_size) */
- #define BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE 0x0002
- #define BCH_FEATURE_COMPAT_SUPP 0
- #define BCH_FEATURE_RO_COMPAT_SUPP 0
- #define BCH_FEATURE_INCOMPAT_SUPP (BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET| \
- BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE)
- #define BCH_HAS_COMPAT_FEATURE(sb, mask) \
- ((sb)->feature_compat & (mask))
- #define BCH_HAS_RO_COMPAT_FEATURE(sb, mask) \
- ((sb)->feature_ro_compat & (mask))
- #define BCH_HAS_INCOMPAT_FEATURE(sb, mask) \
- ((sb)->feature_incompat & (mask))
- #define BCH_FEATURE_COMPAT_FUNCS(name, flagname) \
- static inline int bch_has_feature_##name(struct cache_sb *sb) \
- { \
- if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \
- return 0; \
- return (((sb)->feature_compat & \
- BCH##_FEATURE_COMPAT_##flagname) != 0); \
- } \
- static inline void bch_set_feature_##name(struct cache_sb *sb) \
- { \
- (sb)->feature_compat |= \
- BCH##_FEATURE_COMPAT_##flagname; \
- } \
- static inline void bch_clear_feature_##name(struct cache_sb *sb) \
- { \
- (sb)->feature_compat &= \
- ~BCH##_FEATURE_COMPAT_##flagname; \
- }
- #define BCH_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
- static inline int bch_has_feature_##name(struct cache_sb *sb) \
- { \
- if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \
- return 0; \
- return (((sb)->feature_ro_compat & \
- BCH##_FEATURE_RO_COMPAT_##flagname) != 0); \
- } \
- static inline void bch_set_feature_##name(struct cache_sb *sb) \
- { \
- (sb)->feature_ro_compat |= \
- BCH##_FEATURE_RO_COMPAT_##flagname; \
- } \
- static inline void bch_clear_feature_##name(struct cache_sb *sb) \
- { \
- (sb)->feature_ro_compat &= \
- ~BCH##_FEATURE_RO_COMPAT_##flagname; \
- }
- #define BCH_FEATURE_INCOMPAT_FUNCS(name, flagname) \
- static inline int bch_has_feature_##name(struct cache_sb *sb) \
- { \
- if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \
- return 0; \
- return (((sb)->feature_incompat & \
- BCH##_FEATURE_INCOMPAT_##flagname) != 0); \
- } \
- static inline void bch_set_feature_##name(struct cache_sb *sb) \
- { \
- (sb)->feature_incompat |= \
- BCH##_FEATURE_INCOMPAT_##flagname; \
- } \
- static inline void bch_clear_feature_##name(struct cache_sb *sb) \
- { \
- (sb)->feature_incompat &= \
- ~BCH##_FEATURE_INCOMPAT_##flagname; \
- }
- BCH_FEATURE_INCOMPAT_FUNCS(obso_large_bucket, OBSO_LARGE_BUCKET);
- BCH_FEATURE_INCOMPAT_FUNCS(large_bucket, LOG_LARGE_BUCKET_SIZE);
- static inline bool bch_has_unknown_compat_features(struct cache_sb *sb)
- {
- return ((sb->feature_compat & ~BCH_FEATURE_COMPAT_SUPP) != 0);
- }
- static inline bool bch_has_unknown_ro_compat_features(struct cache_sb *sb)
- {
- return ((sb->feature_ro_compat & ~BCH_FEATURE_RO_COMPAT_SUPP) != 0);
- }
- static inline bool bch_has_unknown_incompat_features(struct cache_sb *sb)
- {
- return ((sb->feature_incompat & ~BCH_FEATURE_INCOMPAT_SUPP) != 0);
- }
- int bch_print_cache_set_feature_compat(struct cache_set *c, char *buf, int size);
- int bch_print_cache_set_feature_ro_compat(struct cache_set *c, char *buf, int size);
- int bch_print_cache_set_feature_incompat(struct cache_set *c, char *buf, int size);
- #endif
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