| Kent Overstreet | d455179 | 2024-01-21 00:01:52 -0500 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _BCACHEFS_ALLOC_BACKGROUND_FORMAT_H |
| 3 | #define _BCACHEFS_ALLOC_BACKGROUND_FORMAT_H |
| 4 | |
| 5 | struct bch_alloc { |
| 6 | struct bch_val v; |
| 7 | __u8 fields; |
| 8 | __u8 gen; |
| 9 | __u8 data[]; |
| 10 | } __packed __aligned(8); |
| 11 | |
| 12 | #define BCH_ALLOC_FIELDS_V1() \ |
| 13 | x(read_time, 16) \ |
| 14 | x(write_time, 16) \ |
| 15 | x(data_type, 8) \ |
| 16 | x(dirty_sectors, 16) \ |
| 17 | x(cached_sectors, 16) \ |
| 18 | x(oldest_gen, 8) \ |
| 19 | x(stripe, 32) \ |
| 20 | x(stripe_redundancy, 8) |
| 21 | |
| 22 | enum { |
| 23 | #define x(name, _bits) BCH_ALLOC_FIELD_V1_##name, |
| 24 | BCH_ALLOC_FIELDS_V1() |
| 25 | #undef x |
| 26 | }; |
| 27 | |
| 28 | struct bch_alloc_v2 { |
| 29 | struct bch_val v; |
| 30 | __u8 nr_fields; |
| 31 | __u8 gen; |
| 32 | __u8 oldest_gen; |
| 33 | __u8 data_type; |
| 34 | __u8 data[]; |
| 35 | } __packed __aligned(8); |
| 36 | |
| 37 | #define BCH_ALLOC_FIELDS_V2() \ |
| 38 | x(read_time, 64) \ |
| 39 | x(write_time, 64) \ |
| 40 | x(dirty_sectors, 32) \ |
| 41 | x(cached_sectors, 32) \ |
| 42 | x(stripe, 32) \ |
| 43 | x(stripe_redundancy, 8) |
| 44 | |
| 45 | struct bch_alloc_v3 { |
| 46 | struct bch_val v; |
| 47 | __le64 journal_seq; |
| 48 | __le32 flags; |
| 49 | __u8 nr_fields; |
| 50 | __u8 gen; |
| 51 | __u8 oldest_gen; |
| 52 | __u8 data_type; |
| 53 | __u8 data[]; |
| 54 | } __packed __aligned(8); |
| 55 | |
| 56 | LE32_BITMASK(BCH_ALLOC_V3_NEED_DISCARD,struct bch_alloc_v3, flags, 0, 1) |
| 57 | LE32_BITMASK(BCH_ALLOC_V3_NEED_INC_GEN,struct bch_alloc_v3, flags, 1, 2) |
| 58 | |
| 59 | struct bch_alloc_v4 { |
| 60 | struct bch_val v; |
| 61 | __u64 journal_seq; |
| 62 | __u32 flags; |
| 63 | __u8 gen; |
| 64 | __u8 oldest_gen; |
| 65 | __u8 data_type; |
| 66 | __u8 stripe_redundancy; |
| 67 | __u32 dirty_sectors; |
| 68 | __u32 cached_sectors; |
| 69 | __u64 io_time[2]; |
| 70 | __u32 stripe; |
| 71 | __u32 nr_external_backpointers; |
| 72 | __u64 fragmentation_lru; |
| 73 | } __packed __aligned(8); |
| 74 | |
| 75 | #define BCH_ALLOC_V4_U64s_V0 6 |
| 76 | #define BCH_ALLOC_V4_U64s (sizeof(struct bch_alloc_v4) / sizeof(__u64)) |
| 77 | |
| 78 | BITMASK(BCH_ALLOC_V4_NEED_DISCARD, struct bch_alloc_v4, flags, 0, 1) |
| 79 | BITMASK(BCH_ALLOC_V4_NEED_INC_GEN, struct bch_alloc_v4, flags, 1, 2) |
| 80 | BITMASK(BCH_ALLOC_V4_BACKPOINTERS_START,struct bch_alloc_v4, flags, 2, 8) |
| 81 | BITMASK(BCH_ALLOC_V4_NR_BACKPOINTERS, struct bch_alloc_v4, flags, 8, 14) |
| 82 | |
| 83 | #define KEY_TYPE_BUCKET_GENS_BITS 8 |
| 84 | #define KEY_TYPE_BUCKET_GENS_NR (1U << KEY_TYPE_BUCKET_GENS_BITS) |
| 85 | #define KEY_TYPE_BUCKET_GENS_MASK (KEY_TYPE_BUCKET_GENS_NR - 1) |
| 86 | |
| 87 | struct bch_bucket_gens { |
| 88 | struct bch_val v; |
| 89 | u8 gens[KEY_TYPE_BUCKET_GENS_NR]; |
| 90 | } __packed __aligned(8); |
| 91 | |
| 92 | #endif /* _BCACHEFS_ALLOC_BACKGROUND_FORMAT_H */ |
