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