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#ifndef _BCACHE_SUPER_IO_H
#define _BCACHE_SUPER_IO_H
#include "extents.h"
#include "super_types.h"
#include <asm/byteorder.h>
struct bch_sb_field *bch_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
struct bch_sb_field *bch_sb_field_resize(struct bcache_superblock *,
enum bch_sb_field_type, unsigned);
struct bch_sb_field *bch_fs_sb_field_resize(struct cache_set *,
enum bch_sb_field_type, unsigned);
#define field_to_type(_f, _name) \
container_of_or_null(_f, struct bch_sb_field_##_name, field)
#define BCH_SB_FIELD_TYPE(_name) \
static inline struct bch_sb_field_##_name * \
bch_sb_get_##_name(struct bch_sb *sb) \
{ \
return field_to_type(bch_sb_field_get(sb, \
BCH_SB_FIELD_##_name), _name); \
} \
\
static inline struct bch_sb_field_##_name * \
bch_sb_resize_##_name(struct bcache_superblock *sb, unsigned u64s) \
{ \
return field_to_type(bch_sb_field_resize(sb, \
BCH_SB_FIELD_##_name, u64s), _name); \
} \
\
static inline struct bch_sb_field_##_name * \
bch_fs_sb_resize_##_name(struct cache_set *c, unsigned u64s) \
{ \
return field_to_type(bch_fs_sb_field_resize(c, \
BCH_SB_FIELD_##_name, u64s), _name); \
}
BCH_SB_FIELD_TYPE(journal);
BCH_SB_FIELD_TYPE(members);
BCH_SB_FIELD_TYPE(crypt);
static inline bool bch_sb_test_feature(struct bch_sb *sb,
enum bch_sb_features f)
{
unsigned w = f / 64;
unsigned b = f % 64;
return le64_to_cpu(sb->features[w]) & (1ULL << b);
}
static inline void bch_sb_set_feature(struct bch_sb *sb,
enum bch_sb_features f)
{
if (!bch_sb_test_feature(sb, f)) {
unsigned w = f / 64;
unsigned b = f % 64;
le64_add_cpu(&sb->features[w], 1ULL << b);
}
}
static inline __le64 bch_sb_magic(struct cache_set *c)
{
__le64 ret;
memcpy(&ret, &c->sb.uuid, sizeof(ret));
return ret;
}
static inline __u64 jset_magic(struct cache_set *c)
{
return __le64_to_cpu(bch_sb_magic(c) ^ JSET_MAGIC);
}
static inline __u64 pset_magic(struct cache_set *c)
{
return __le64_to_cpu(bch_sb_magic(c) ^ PSET_MAGIC);
}
static inline __u64 bset_magic(struct cache_set *c)
{
return __le64_to_cpu(bch_sb_magic(c) ^ BSET_MAGIC);
}
static inline struct cache_member_cpu cache_mi_to_cpu_mi(struct bch_member *mi)
{
return (struct cache_member_cpu) {
.nbuckets = le64_to_cpu(mi->nbuckets),
.first_bucket = le16_to_cpu(mi->first_bucket),
.bucket_size = le16_to_cpu(mi->bucket_size),
.state = BCH_MEMBER_STATE(mi),
.tier = BCH_MEMBER_TIER(mi),
.has_metadata = BCH_MEMBER_HAS_METADATA(mi),
.has_data = BCH_MEMBER_HAS_DATA(mi),
.replacement = BCH_MEMBER_REPLACEMENT(mi),
.discard = BCH_MEMBER_DISCARD(mi),
.valid = !bch_is_zero(mi->uuid.b, sizeof(uuid_le)),
};
}
int bch_fs_mi_update(struct cache_set *, struct bch_member *, unsigned);
int bch_sb_to_cache_set(struct cache_set *, struct bch_sb *);
int bch_sb_from_cache_set(struct cache_set *, struct cache *);
void bch_free_super(struct bcache_superblock *);
int bch_super_realloc(struct bcache_superblock *, unsigned);
const char *bch_validate_journal_layout(struct bch_sb *,
struct cache_member_cpu);
const char *bch_validate_cache_super(struct bcache_superblock *);
const char *bch_read_super(struct bcache_superblock *,
struct bch_opts, const char *);
void bch_write_super(struct cache_set *);
void bch_check_mark_super_slowpath(struct cache_set *,
const struct bkey_i *, bool);
#define cache_member_info_get(_c) \
(rcu_read_lock(), rcu_dereference((_c)->members))
#define cache_member_info_put() rcu_read_unlock()
static inline bool bch_check_super_marked(struct cache_set *c,
const struct bkey_i *k, bool meta)
{
struct bkey_s_c_extent e = bkey_i_to_s_c_extent(k);
const struct bch_extent_ptr *ptr;
struct cache_member_cpu *mi = cache_member_info_get(c)->m;
bool ret = true;
extent_for_each_ptr(e, ptr)
if (!ptr->cached &&
!(meta
? mi[ptr->dev].has_metadata
: mi[ptr->dev].has_data)) {
ret = false;
break;
}
cache_member_info_put();
return ret;
}
static inline void bch_check_mark_super(struct cache_set *c,
const struct bkey_i *k, bool meta)
{
if (bch_check_super_marked(c, k, meta))
return;
bch_check_mark_super_slowpath(c, k, meta);
}
#endif /* _BCACHE_SUPER_IO_H */
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