260af1562e
The fragmentation_lru field hasn't been needed since we reworked the LRU btrees to use the btree write buffer; previously it was used to resolve collisions, but the revised LRU btree uses the backpointer (the bucket) as part of the key. It should have been deleted at the time of the LRU rework; since it wasn't, that left places for bugs to hide, in check/repair. This fixes LRU fsck on a filesystem image helpfully provided by a user who disappeared before I could get his name for the reported-by. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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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