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