drivers/md/bcache/features.h

   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 #define BCH_FEATURE_INCOMPAT_LARGE_BUCKET       0x0001 /* 32bit bucket size */
  17
  18 #define BCH_FEATURE_COMPAT_SUUP         0
  19 #define BCH_FEATURE_RO_COMPAT_SUUP      0
  20 #define BCH_FEATURE_INCOMPAT_SUUP       BCH_FEATURE_INCOMPAT_LARGE_BUCKET
  21
  22 #define BCH_HAS_COMPAT_FEATURE(sb, mask) \
  23                 ((sb)->feature_compat & (mask))
  24 #define BCH_HAS_RO_COMPAT_FEATURE(sb, mask) \
  25                 ((sb)->feature_ro_compat & (mask))
  26 #define BCH_HAS_INCOMPAT_FEATURE(sb, mask) \
  27                 ((sb)->feature_incompat & (mask))
  28
  29 #define BCH_FEATURE_COMPAT_FUNCS(name, flagname) \
  30 static inline int bch_has_feature_##name(struct cache_sb *sb) \
  31 { \
  32         return (((sb)->feature_compat & \
  33                 BCH##_FEATURE_COMPAT_##flagname) != 0); \
  34 } \
  35 static inline void bch_set_feature_##name(struct cache_sb *sb) \
  36 { \
  37         (sb)->feature_compat |= \
  38                 BCH##_FEATURE_COMPAT_##flagname; \
  39 } \
  40 static inline void bch_clear_feature_##name(struct cache_sb *sb) \
  41 { \
  42         (sb)->feature_compat &= \
  43                 ~BCH##_FEATURE_COMPAT_##flagname; \
  44 }
  45
  46 #define BCH_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
  47 static inline int bch_has_feature_##name(struct cache_sb *sb) \
  48 { \
  49         return (((sb)->feature_ro_compat & \
  50                 BCH##_FEATURE_RO_COMPAT_##flagname) != 0); \
  51 } \
  52 static inline void bch_set_feature_##name(struct cache_sb *sb) \
  53 { \
  54         (sb)->feature_ro_compat |= \
  55                 BCH##_FEATURE_RO_COMPAT_##flagname; \
  56 } \
  57 static inline void bch_clear_feature_##name(struct cache_sb *sb) \
  58 { \
  59         (sb)->feature_ro_compat &= \
  60                 ~BCH##_FEATURE_RO_COMPAT_##flagname; \
  61 }
  62
  63 #define BCH_FEATURE_INCOMPAT_FUNCS(name, flagname) \
  64 static inline int bch_has_feature_##name(struct cache_sb *sb) \
  65 { \
  66         return (((sb)->feature_incompat & \
  67                 BCH##_FEATURE_INCOMPAT_##flagname) != 0); \
  68 } \
  69 static inline void bch_set_feature_##name(struct cache_sb *sb) \
  70 { \
  71         (sb)->feature_incompat |= \
  72                 BCH##_FEATURE_INCOMPAT_##flagname; \
  73 } \
  74 static inline void bch_clear_feature_##name(struct cache_sb *sb) \
  75 { \
  76         (sb)->feature_incompat &= \
  77                 ~BCH##_FEATURE_INCOMPAT_##flagname; \
  78 }
  79
  80 BCH_FEATURE_INCOMPAT_FUNCS(large_bucket, LARGE_BUCKET);
  81
  82 int bch_print_cache_set_feature_compat(struct cache_set *c, char *buf, int size);
  83 int bch_print_cache_set_feature_ro_compat(struct cache_set *c, char *buf, int size);
  84 int bch_print_cache_set_feature_incompat(struct cache_set *c, char *buf, int size);
  85
  86 #endif