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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_SB_MEMBERS_FORMAT_H
#define _BCACHEFS_SB_MEMBERS_FORMAT_H
/*
* We refer to members with bitmasks in various places - but we need to get rid
* of this limit:
*/
#define BCH_SB_MEMBERS_MAX 64
/*
* Sentinal value - indicates a device that does not exist
*/
#define BCH_SB_MEMBER_INVALID 255
#define BCH_MIN_NR_NBUCKETS (1 << 6)
#define BCH_IOPS_MEASUREMENTS() \
x(seqread, 0) \
x(seqwrite, 1) \
x(randread, 2) \
x(randwrite, 3)
enum bch_iops_measurement {
#define x(t, n) BCH_IOPS_##t = n,
BCH_IOPS_MEASUREMENTS()
#undef x
BCH_IOPS_NR
};
#define BCH_MEMBER_ERROR_TYPES() \
x(read, 0) \
x(write, 1) \
x(checksum, 2)
enum bch_member_error_type {
#define x(t, n) BCH_MEMBER_ERROR_##t = n,
BCH_MEMBER_ERROR_TYPES()
#undef x
BCH_MEMBER_ERROR_NR
};
struct bch_member {
__uuid_t uuid;
__le64 nbuckets; /* device size */
__le16 first_bucket; /* index of first bucket used */
__le16 bucket_size; /* sectors */
__u8 btree_bitmap_shift;
__u8 pad[3];
__le64 last_mount; /* time_t */
__le64 flags;
__le32 iops[4];
__le64 errors[BCH_MEMBER_ERROR_NR];
__le64 errors_at_reset[BCH_MEMBER_ERROR_NR];
__le64 errors_reset_time;
__le64 seq;
__le64 btree_allocated_bitmap;
/*
* On recovery from a clean shutdown we don't normally read the journal,
* but we still want to resume writing from where we left off so we
* don't overwrite more than is necessary, for list journal debugging:
*/
__le32 last_journal_bucket;
__le32 last_journal_bucket_offset;
};
/*
* This limit comes from the bucket_gens array - it's a single allocation, and
* kernel allocation are limited to INT_MAX
*/
#define BCH_MEMBER_NBUCKETS_MAX (INT_MAX - 64)
#define BCH_MEMBER_V1_BYTES 56
LE64_BITMASK(BCH_MEMBER_STATE, struct bch_member, flags, 0, 4)
/* 4-14 unused, was TIER, HAS_(META)DATA, REPLACEMENT */
LE64_BITMASK(BCH_MEMBER_DISCARD, struct bch_member, flags, 14, 15)
LE64_BITMASK(BCH_MEMBER_DATA_ALLOWED, struct bch_member, flags, 15, 20)
LE64_BITMASK(BCH_MEMBER_GROUP, struct bch_member, flags, 20, 28)
LE64_BITMASK(BCH_MEMBER_DURABILITY, struct bch_member, flags, 28, 30)
LE64_BITMASK(BCH_MEMBER_FREESPACE_INITIALIZED,
struct bch_member, flags, 30, 31)
#if 0
LE64_BITMASK(BCH_MEMBER_NR_READ_ERRORS, struct bch_member, flags[1], 0, 20);
LE64_BITMASK(BCH_MEMBER_NR_WRITE_ERRORS,struct bch_member, flags[1], 20, 40);
#endif
#define BCH_MEMBER_STATES() \
x(rw, 0) \
x(ro, 1) \
x(failed, 2) \
x(spare, 3)
enum bch_member_state {
#define x(t, n) BCH_MEMBER_STATE_##t = n,
BCH_MEMBER_STATES()
#undef x
BCH_MEMBER_STATE_NR
};
struct bch_sb_field_members_v1 {
struct bch_sb_field field;
struct bch_member _members[]; //Members are now variable size
};
struct bch_sb_field_members_v2 {
struct bch_sb_field field;
__le16 member_bytes; //size of single member entry
u8 pad[6];
struct bch_member _members[];
};
#endif /* _BCACHEFS_SB_MEMBERS_FORMAT_H */
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