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 */ |
93 | |