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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_ALLOC_TYPES_H
3#define _BCACHEFS_ALLOC_TYPES_H
4
5#include <linux/mutex.h>
6#include <linux/spinlock.h>
7
8#include "clock_types.h"
9#include "fifo.h"
10
11struct bucket_alloc_state {
12 enum {
13 BTREE_BITMAP_NO,
14 BTREE_BITMAP_YES,
15 BTREE_BITMAP_ANY,
16 } btree_bitmap;
17
18 u64 buckets_seen;
19 u64 skipped_open;
20 u64 skipped_need_journal_commit;
21 u64 need_journal_commit;
22 u64 skipped_nocow;
23 u64 skipped_nouse;
24 u64 skipped_mi_btree_bitmap;
25};
26
27#define BCH_WATERMARKS() \
28 x(stripe) \
29 x(normal) \
30 x(copygc) \
31 x(btree) \
32 x(btree_copygc) \
33 x(reclaim) \
34 x(interior_updates)
35
36enum bch_watermark {
37#define x(name) BCH_WATERMARK_##name,
38 BCH_WATERMARKS()
39#undef x
40 BCH_WATERMARK_NR,
41};
42
43#define BCH_WATERMARK_BITS 3
44#define BCH_WATERMARK_MASK ~(~0U << BCH_WATERMARK_BITS)
45
46#define OPEN_BUCKETS_COUNT 1024
47
48#define WRITE_POINT_HASH_NR 32
49#define WRITE_POINT_MAX 32
50
51/*
52 * 0 is never a valid open_bucket_idx_t:
53 */
54typedef u16 open_bucket_idx_t;
55
56struct open_bucket {
57 spinlock_t lock;
58 atomic_t pin;
59 open_bucket_idx_t freelist;
60 open_bucket_idx_t hash;
61
62 /*
63 * When an open bucket has an ec_stripe attached, this is the index of
64 * the block in the stripe this open_bucket corresponds to:
65 */
66 u8 ec_idx;
67 enum bch_data_type data_type:6;
68 unsigned valid:1;
69 unsigned on_partial_list:1;
70
71 u8 dev;
72 u8 gen;
73 u32 sectors_free;
74 u64 bucket;
75 struct ec_stripe_new *ec;
76};
77
78#define OPEN_BUCKET_LIST_MAX 15
79
80struct open_buckets {
81 open_bucket_idx_t nr;
82 open_bucket_idx_t v[OPEN_BUCKET_LIST_MAX];
83};
84
85struct dev_stripe_state {
86 u64 next_alloc[BCH_SB_MEMBERS_MAX];
87};
88
89#define WRITE_POINT_STATES() \
90 x(stopped) \
91 x(waiting_io) \
92 x(waiting_work) \
93 x(running)
94
95enum write_point_state {
96#define x(n) WRITE_POINT_##n,
97 WRITE_POINT_STATES()
98#undef x
99 WRITE_POINT_STATE_NR
100};
101
102struct write_point {
103 struct {
104 struct hlist_node node;
105 struct mutex lock;
106 u64 last_used;
107 unsigned long write_point;
108 enum bch_data_type data_type;
109
110 /* calculated based on how many pointers we're actually going to use: */
111 unsigned sectors_free;
112
113 struct open_buckets ptrs;
114 struct dev_stripe_state stripe;
115
116 u64 sectors_allocated;
117 } __aligned(SMP_CACHE_BYTES);
118
119 struct {
120 struct work_struct index_update_work;
121
122 struct list_head writes;
123 spinlock_t writes_lock;
124
125 enum write_point_state state;
126 u64 last_state_change;
127 u64 time[WRITE_POINT_STATE_NR];
128 } __aligned(SMP_CACHE_BYTES);
129};
130
131struct write_point_specifier {
132 unsigned long v;
133};
134
135#endif /* _BCACHEFS_ALLOC_TYPES_H */