96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_ALLOC_BACKGROUND_FORMAT_H
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#define _BCACHEFS_ALLOC_BACKGROUND_FORMAT_H
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struct bch_alloc {
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struct bch_val v;
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__u8 fields;
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__u8 gen;
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__u8 data[];
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} __packed __aligned(8);
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#define BCH_ALLOC_FIELDS_V1() \
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x(read_time, 16) \
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x(write_time, 16) \
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x(data_type, 8) \
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x(dirty_sectors, 16) \
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x(cached_sectors, 16) \
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x(oldest_gen, 8) \
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x(stripe, 32) \
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x(stripe_redundancy, 8)
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enum {
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#define x(name, _bits) BCH_ALLOC_FIELD_V1_##name,
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BCH_ALLOC_FIELDS_V1()
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#undef x
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};
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struct bch_alloc_v2 {
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struct bch_val v;
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__u8 nr_fields;
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__u8 gen;
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__u8 oldest_gen;
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__u8 data_type;
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__u8 data[];
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} __packed __aligned(8);
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#define BCH_ALLOC_FIELDS_V2() \
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x(read_time, 64) \
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x(write_time, 64) \
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x(dirty_sectors, 32) \
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x(cached_sectors, 32) \
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x(stripe, 32) \
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x(stripe_redundancy, 8)
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struct bch_alloc_v3 {
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struct bch_val v;
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__le64 journal_seq;
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__le32 flags;
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__u8 nr_fields;
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__u8 gen;
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__u8 oldest_gen;
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__u8 data_type;
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__u8 data[];
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} __packed __aligned(8);
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LE32_BITMASK(BCH_ALLOC_V3_NEED_DISCARD,struct bch_alloc_v3, flags, 0, 1)
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LE32_BITMASK(BCH_ALLOC_V3_NEED_INC_GEN,struct bch_alloc_v3, flags, 1, 2)
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struct bch_alloc_v4 {
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struct bch_val v;
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__u64 journal_seq;
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__u32 flags;
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__u8 gen;
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__u8 oldest_gen;
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__u8 data_type;
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__u8 stripe_redundancy;
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__u32 dirty_sectors;
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__u32 cached_sectors;
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__u64 io_time[2];
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__u32 stripe;
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__u32 nr_external_backpointers;
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/* end of fields in original version of alloc_v4 */
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__u64 _fragmentation_lru; /* obsolete */
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__u32 stripe_sectors;
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__u32 pad;
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} __packed __aligned(8);
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#define BCH_ALLOC_V4_U64s_V0 6
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#define BCH_ALLOC_V4_U64s (sizeof(struct bch_alloc_v4) / sizeof(__u64))
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BITMASK(BCH_ALLOC_V4_NEED_DISCARD, struct bch_alloc_v4, flags, 0, 1)
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BITMASK(BCH_ALLOC_V4_NEED_INC_GEN, struct bch_alloc_v4, flags, 1, 2)
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BITMASK(BCH_ALLOC_V4_BACKPOINTERS_START,struct bch_alloc_v4, flags, 2, 8)
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BITMASK(BCH_ALLOC_V4_NR_BACKPOINTERS, struct bch_alloc_v4, flags, 8, 14)
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#define KEY_TYPE_BUCKET_GENS_BITS 8
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#define KEY_TYPE_BUCKET_GENS_NR (1U << KEY_TYPE_BUCKET_GENS_BITS)
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#define KEY_TYPE_BUCKET_GENS_MASK (KEY_TYPE_BUCKET_GENS_NR - 1)
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struct bch_bucket_gens {
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struct bch_val v;
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u8 gens[KEY_TYPE_BUCKET_GENS_NR];
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} __packed __aligned(8);
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#endif /* _BCACHEFS_ALLOC_BACKGROUND_FORMAT_H */
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