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 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 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 } 103 104 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