text: /* 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
  