1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_ALLOC_FOREGROUND_H
3#define _BCACHEFS_ALLOC_FOREGROUND_H
4
5#include "bcachefs.h"
6#include "alloc_types.h"
7#include "extents.h"
8#include "sb-members.h"
9
10#include <linux/hash.h>
11
12struct bkey;
13struct bch_dev;
14struct bch_fs;
15struct bch_devs_List;
16
17extern const char * const bch2_watermarks[];
18
19void bch2_reset_alloc_cursors(struct bch_fs *);
20
21struct dev_alloc_list {
22 unsigned nr;
23 u8 devs[BCH_SB_MEMBERS_MAX];
24};
25
26struct dev_alloc_list bch2_dev_alloc_list(struct bch_fs *,
27 struct dev_stripe_state *,
28 struct bch_devs_mask *);
29void bch2_dev_stripe_increment(struct bch_dev *, struct dev_stripe_state *);
30
31long bch2_bucket_alloc_new_fs(struct bch_dev *);
32
33struct open_bucket *bch2_bucket_alloc(struct bch_fs *, struct bch_dev *,
34 enum bch_watermark, struct closure *);
35
36static inline void ob_push(struct bch_fs *c, struct open_buckets *obs,
37 struct open_bucket *ob)
38{
39 BUG_ON(obs->nr >= ARRAY_SIZE(obs->v));
40
41 obs->v[obs->nr++] = ob - c->open_buckets;
42}
43
44#define open_bucket_for_each(_c, _obs, _ob, _i) \
45 for ((_i) = 0; \
46 (_i) < (_obs)->nr && \
47 ((_ob) = (_c)->open_buckets + (_obs)->v[_i], true); \
48 (_i)++)
49
50static inline struct open_bucket *ec_open_bucket(struct bch_fs *c,
51 struct open_buckets *obs)
52{
53 struct open_bucket *ob;
54 unsigned i;
55
56 open_bucket_for_each(c, obs, ob, i)
57 if (ob->ec)
58 return ob;
59
60 return NULL;
61}
62
63void bch2_open_bucket_write_error(struct bch_fs *,
64 struct open_buckets *, unsigned);
65
66void __bch2_open_bucket_put(struct bch_fs *, struct open_bucket *);
67
68static inline void bch2_open_bucket_put(struct bch_fs *c, struct open_bucket *ob)
69{
70 if (atomic_dec_and_test(v: &ob->pin))
71 __bch2_open_bucket_put(c, ob);
72}
73
74static inline void bch2_open_buckets_put(struct bch_fs *c,
75 struct open_buckets *ptrs)
76{
77 struct open_bucket *ob;
78 unsigned i;
79
80 open_bucket_for_each(c, ptrs, ob, i)
81 bch2_open_bucket_put(c, ob);
82 ptrs->nr = 0;
83}
84
85static inline void bch2_alloc_sectors_done_inlined(struct bch_fs *c, struct write_point *wp)
86{
87 struct open_buckets ptrs = { .nr = 0 }, keep = { .nr = 0 };
88 struct open_bucket *ob;
89 unsigned i;
90
91 open_bucket_for_each(c, &wp->ptrs, ob, i)
92 ob_push(c, obs: !ob->sectors_free ? &ptrs : &keep, ob);
93 wp->ptrs = keep;
94
95 mutex_unlock(lock: &wp->lock);
96
97 bch2_open_buckets_put(c, ptrs: &ptrs);
98}
99
100static inline void bch2_open_bucket_get(struct bch_fs *c,
101 struct write_point *wp,
102 struct open_buckets *ptrs)
103{
104 struct open_bucket *ob;
105 unsigned i;
106
107 open_bucket_for_each(c, &wp->ptrs, ob, i) {
108 ob->data_type = wp->data_type;
109 atomic_inc(v: &ob->pin);
110 ob_push(c, obs: ptrs, ob);
111 }
112}
113
114static inline open_bucket_idx_t *open_bucket_hashslot(struct bch_fs *c,
115 unsigned dev, u64 bucket)
116{
117 return c->open_buckets_hash +
118 (jhash_3words(a: dev, b: bucket, c: bucket >> 32, initval: 0) &
119 (OPEN_BUCKETS_COUNT - 1));
120}
121
122static inline bool bch2_bucket_is_open(struct bch_fs *c, unsigned dev, u64 bucket)
123{
124 open_bucket_idx_t slot = *open_bucket_hashslot(c, dev, bucket);
125
126 while (slot) {
127 struct open_bucket *ob = &c->open_buckets[slot];
128
129 if (ob->dev == dev && ob->bucket == bucket)
130 return true;
131
132 slot = ob->hash;
133 }
134
135 return false;
136}
137
138static inline bool bch2_bucket_is_open_safe(struct bch_fs *c, unsigned dev, u64 bucket)
139{
140 bool ret;
141
142 if (bch2_bucket_is_open(c, dev, bucket))
143 return true;
144
145 spin_lock(lock: &c->freelist_lock);
146 ret = bch2_bucket_is_open(c, dev, bucket);
147 spin_unlock(lock: &c->freelist_lock);
148
149 return ret;
150}
151
152int bch2_bucket_alloc_set_trans(struct btree_trans *, struct open_buckets *,
153 struct dev_stripe_state *, struct bch_devs_mask *,
154 unsigned, unsigned *, bool *, unsigned,
155 enum bch_data_type, enum bch_watermark,
156 struct closure *);
157
158int bch2_alloc_sectors_start_trans(struct btree_trans *,
159 unsigned, unsigned,
160 struct write_point_specifier,
161 struct bch_devs_list *,
162 unsigned, unsigned,
163 enum bch_watermark,
164 unsigned,
165 struct closure *,
166 struct write_point **);
167
168struct bch_extent_ptr bch2_ob_ptr(struct bch_fs *, struct open_bucket *);
169
170/*
171 * Append pointers to the space we just allocated to @k, and mark @sectors space
172 * as allocated out of @ob
173 */
174static inline void
175bch2_alloc_sectors_append_ptrs_inlined(struct bch_fs *c, struct write_point *wp,
176 struct bkey_i *k, unsigned sectors,
177 bool cached)
178{
179 struct open_bucket *ob;
180 unsigned i;
181
182 BUG_ON(sectors > wp->sectors_free);
183 wp->sectors_free -= sectors;
184 wp->sectors_allocated += sectors;
185
186 open_bucket_for_each(c, &wp->ptrs, ob, i) {
187 struct bch_dev *ca = bch_dev_bkey_exists(c, idx: ob->dev);
188 struct bch_extent_ptr ptr = bch2_ob_ptr(c, ob);
189
190 ptr.cached = cached ||
191 (!ca->mi.durability &&
192 wp->data_type == BCH_DATA_user);
193
194 bch2_bkey_append_ptr(k, ptr);
195
196 BUG_ON(sectors > ob->sectors_free);
197 ob->sectors_free -= sectors;
198 }
199}
200
201void bch2_alloc_sectors_append_ptrs(struct bch_fs *, struct write_point *,
202 struct bkey_i *, unsigned, bool);
203void bch2_alloc_sectors_done(struct bch_fs *, struct write_point *);
204
205void bch2_open_buckets_stop(struct bch_fs *c, struct bch_dev *, bool);
206
207static inline struct write_point_specifier writepoint_hashed(unsigned long v)
208{
209 return (struct write_point_specifier) { .v = v | 1 };
210}
211
212static inline struct write_point_specifier writepoint_ptr(struct write_point *wp)
213{
214 return (struct write_point_specifier) { .v = (unsigned long) wp };
215}
216
217void bch2_fs_allocator_foreground_init(struct bch_fs *);
218
219void bch2_open_buckets_to_text(struct printbuf *, struct bch_fs *);
220void bch2_open_buckets_partial_to_text(struct printbuf *, struct bch_fs *);
221
222void bch2_write_points_to_text(struct printbuf *, struct bch_fs *);
223
224#endif /* _BCACHEFS_ALLOC_FOREGROUND_H */
225

source code of linux/fs/bcachefs/alloc_foreground.h