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https://github.com/koverstreet/bcachefs-tools.git
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120 lines
3.8 KiB
C
120 lines
3.8 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 "sb-members.h"
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#include <asm/byteorder.h>
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#define BCH_SB_READ_SCRATCH_BUF_SIZE 4096
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static inline bool bch2_version_compatible(u16 version)
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{
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return BCH_VERSION_MAJOR(version) <= BCH_VERSION_MAJOR(bcachefs_metadata_version_current) &&
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version >= bcachefs_metadata_version_min;
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}
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void bch2_version_to_text(struct printbuf *, enum bcachefs_metadata_version);
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enum bcachefs_metadata_version bch2_latest_compatible_version(enum bcachefs_metadata_version);
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void bch2_set_version_incompat(struct bch_fs *, enum bcachefs_metadata_version);
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static inline bool bch2_request_incompat_feature(struct bch_fs *c,
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enum bcachefs_metadata_version version)
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{
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if (unlikely(version > c->sb.version_incompat)) {
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if (version > c->sb.version_incompat_allowed)
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return false;
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bch2_set_version_incompat(c, version);
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}
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return true;
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}
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static inline size_t bch2_sb_field_bytes(struct bch_sb_field *f)
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{
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return le32_to_cpu(f->u64s) * sizeof(u64);
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}
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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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struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *, enum bch_sb_field_type);
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#define bch2_sb_field_get(_sb, _name) \
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field_to_type(bch2_sb_field_get_id(_sb, BCH_SB_FIELD_##_name), _name)
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struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *,
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enum bch_sb_field_type, unsigned);
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#define bch2_sb_field_resize(_sb, _name, _u64s) \
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field_to_type(bch2_sb_field_resize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)
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struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *,
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enum bch_sb_field_type, unsigned);
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#define bch2_sb_field_get_minsize(_sb, _name, _u64s) \
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field_to_type(bch2_sb_field_get_minsize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)
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#define bch2_sb_field_nr_entries(_f) \
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(_f ? ((bch2_sb_field_bytes(&_f->field) - sizeof(*_f)) / \
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sizeof(_f->entries[0])) \
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: 0)
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void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
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extern const char * const bch2_sb_fields[];
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struct bch_sb_field_ops {
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int (*validate)(struct bch_sb *, struct bch_sb_field *,
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enum bch_validate_flags, struct printbuf *);
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void (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
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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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int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
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int bch2_read_super_silent(const char *, struct bch_opts *, struct bch_sb_handle *);
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int bch2_write_super(struct bch_fs *);
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void __bch2_check_set_feature(struct bch_fs *, unsigned);
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static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
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{
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if (!(c->sb.features & (1ULL << feat)))
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__bch2_check_set_feature(c, feat);
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}
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bool bch2_check_version_downgrade(struct bch_fs *);
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void bch2_sb_upgrade(struct bch_fs *, unsigned, bool);
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void __bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
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struct bch_sb_field *);
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void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
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struct bch_sb_field *);
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void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
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void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
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#endif /* _BCACHEFS_SUPER_IO_H */
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