143 lines
3.6 KiB
C
143 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_SUPER_IO_H
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#define _BCACHEFS_SUPER_IO_H
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#include "extents.h"
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#include "eytzinger.h"
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#include "super_types.h"
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#include "super.h"
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#include <asm/byteorder.h>
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struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
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struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *,
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enum bch_sb_field_type, unsigned);
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#define field_to_type(_f, _name) \
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container_of_or_null(_f, struct bch_sb_field_##_name, field)
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#define x(_name, _nr) \
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static inline struct bch_sb_field_##_name * \
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bch2_sb_get_##_name(struct bch_sb *sb) \
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{ \
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return field_to_type(bch2_sb_field_get(sb, \
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BCH_SB_FIELD_##_name), _name); \
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} \
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\
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static inline struct bch_sb_field_##_name * \
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bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
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{ \
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return field_to_type(bch2_sb_field_resize(sb, \
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BCH_SB_FIELD_##_name, u64s), _name); \
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}
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BCH_SB_FIELDS()
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#undef x
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extern const char * const bch2_sb_fields[];
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struct bch_sb_field_ops {
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const char * (*validate)(struct bch_sb *, struct bch_sb_field *);
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size_t (*to_text)(char *, size_t, struct bch_sb *,
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struct bch_sb_field *);
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};
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static inline bool bch2_sb_test_feature(struct bch_sb *sb,
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enum bch_sb_features f)
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{
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unsigned w = f / 64;
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unsigned b = f % 64;
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return le64_to_cpu(sb->features[w]) & (1ULL << b);
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}
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static inline void bch2_sb_set_feature(struct bch_sb *sb,
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enum bch_sb_features f)
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{
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if (!bch2_sb_test_feature(sb, f)) {
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unsigned w = f / 64;
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unsigned b = f % 64;
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le64_add_cpu(&sb->features[w], 1ULL << b);
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}
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}
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static inline __le64 bch2_sb_magic(struct bch_fs *c)
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{
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__le64 ret;
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memcpy(&ret, &c->sb.uuid, sizeof(ret));
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return ret;
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}
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static inline __u64 jset_magic(struct bch_fs *c)
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{
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return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
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}
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static inline __u64 bset_magic(struct bch_fs *c)
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{
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return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
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}
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int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
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int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
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void bch2_free_super(struct bch_sb_handle *);
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int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
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const char *bch2_sb_validate(struct bch_sb_handle *);
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int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
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void bch2_write_super(struct bch_fs *);
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/* BCH_SB_FIELD_journal: */
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static inline unsigned bch2_nr_journal_buckets(struct bch_sb_field_journal *j)
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{
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return j
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? (__le64 *) vstruct_end(&j->field) - j->buckets
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: 0;
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}
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/* BCH_SB_FIELD_members: */
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static inline bool bch2_member_exists(struct bch_member *m)
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{
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return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
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}
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static inline bool bch2_dev_exists(struct bch_sb *sb,
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struct bch_sb_field_members *mi,
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unsigned dev)
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{
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return dev < sb->nr_devices &&
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bch2_member_exists(&mi->members[dev]);
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}
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static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
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{
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return (struct bch_member_cpu) {
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.nbuckets = le64_to_cpu(mi->nbuckets),
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.first_bucket = le16_to_cpu(mi->first_bucket),
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.bucket_size = le16_to_cpu(mi->bucket_size),
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.group = BCH_MEMBER_GROUP(mi),
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.state = BCH_MEMBER_STATE(mi),
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.replacement = BCH_MEMBER_REPLACEMENT(mi),
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.discard = BCH_MEMBER_DISCARD(mi),
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.data_allowed = BCH_MEMBER_DATA_ALLOWED(mi),
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.durability = BCH_MEMBER_DURABILITY(mi)
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? BCH_MEMBER_DURABILITY(mi) - 1
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: 1,
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.valid = bch2_member_exists(mi),
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};
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}
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/* BCH_SB_FIELD_clean: */
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void bch2_fs_mark_clean(struct bch_fs *, bool);
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size_t bch2_sb_field_to_text(char *, size_t, struct bch_sb *,
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struct bch_sb_field *);
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#endif /* _BCACHEFS_SUPER_IO_H */
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