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