hc
2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da
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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