tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_MOVE_H
3#define _BCACHEFS_MOVE_H
4
5#include "bbpos.h"
6#include "bcachefs_ioctl.h"
7#include "btree_iter.h"
8#include "buckets.h"
9#include "data_update.h"
10#include "move_types.h"
11
12struct bch_read_bio;
13
14struct moving_context {
15 struct btree_trans *trans;
16 struct list_head list;
17 void *fn;
18
19 struct bch_ratelimit *rate;
20 struct bch_move_stats *stats;
21 struct write_point_specifier wp;
22 bool wait_on_copygc;
23 bool write_error;
24
25 /* For waiting on outstanding reads and writes: */
26 struct closure cl;
27
28 struct mutex lock;
29 struct list_head reads;
30 struct list_head ios;
31
32 /* in flight sectors: */
33 atomic_t read_sectors;
34 atomic_t write_sectors;
35 atomic_t read_ios;
36 atomic_t write_ios;
37
38 wait_queue_head_t wait;
39};
40
41#define move_ctxt_wait_event_timeout(_ctxt, _cond, _timeout) \
42({ \
43 int _ret = 0; \
44 while (true) { \
45 bool cond_finished = false; \
46 bch2_moving_ctxt_do_pending_writes(_ctxt); \
47 \
48 if (_cond) \
49 break; \
50 bch2_trans_unlock_long((_ctxt)->trans); \
51 _ret = __wait_event_timeout((_ctxt)->wait, \
52 bch2_moving_ctxt_next_pending_write(_ctxt) || \
53 (cond_finished = (_cond)), _timeout); \
54 if (_ret || ( cond_finished)) \
55 break; \
56 } \
57 _ret; \
58})
59
60#define move_ctxt_wait_event(_ctxt, _cond) \
61do { \
62 bool cond_finished = false; \
63 bch2_moving_ctxt_do_pending_writes(_ctxt); \
64 \
65 if (_cond) \
66 break; \
67 bch2_trans_unlock_long((_ctxt)->trans); \
68 __wait_event((_ctxt)->wait, \
69 bch2_moving_ctxt_next_pending_write(_ctxt) || \
70 (cond_finished = (_cond))); \
71 if (cond_finished) \
72 break; \
73} while (1)
74
75typedef bool (*move_pred_fn)(struct bch_fs *, void *, struct bkey_s_c,
76 struct bch_io_opts *, struct data_update_opts *);
77
78void bch2_moving_ctxt_exit(struct moving_context *);
79void bch2_moving_ctxt_init(struct moving_context *, struct bch_fs *,
80 struct bch_ratelimit *, struct bch_move_stats *,
81 struct write_point_specifier, bool);
82struct moving_io *bch2_moving_ctxt_next_pending_write(struct moving_context *);
83void bch2_moving_ctxt_do_pending_writes(struct moving_context *);
84void bch2_move_ctxt_wait_for_io(struct moving_context *);
85int bch2_move_ratelimit(struct moving_context *);
86
87/* Inodes in different snapshots may have different IO options: */
88struct snapshot_io_opts_entry {
89 u32 snapshot;
90 struct bch_io_opts io_opts;
91};
92
93struct per_snapshot_io_opts {
94 u64 cur_inum;
95 struct bch_io_opts fs_io_opts;
96 DARRAY(struct snapshot_io_opts_entry) d;
97};
98
99static inline void per_snapshot_io_opts_init(struct per_snapshot_io_opts *io_opts, struct bch_fs *c)
100{
101 memset(io_opts, 0, sizeof(*io_opts));
102 io_opts->fs_io_opts = bch2_opts_to_inode_opts(c->opts);
103}
104
105static inline void per_snapshot_io_opts_exit(struct per_snapshot_io_opts *io_opts)
106{
107 darray_exit(&io_opts->d);
108}
109
110struct bch_io_opts *bch2_move_get_io_opts(struct btree_trans *,
111 struct per_snapshot_io_opts *, struct bkey_s_c);
112int bch2_move_get_io_opts_one(struct btree_trans *, struct bch_io_opts *, struct bkey_s_c);
113
114int bch2_scan_old_btree_nodes(struct bch_fs *, struct bch_move_stats *);
115
116int bch2_move_extent(struct moving_context *,
117 struct move_bucket_in_flight *,
118 struct btree_iter *,
119 struct bkey_s_c,
120 struct bch_io_opts,
121 struct data_update_opts);
122
123int __bch2_move_data(struct moving_context *,
124 struct bbpos,
125 struct bbpos,
126 move_pred_fn, void *);
127int bch2_move_data(struct bch_fs *,
128 struct bbpos start,
129 struct bbpos end,
130 struct bch_ratelimit *,
131 struct bch_move_stats *,
132 struct write_point_specifier,
133 bool,
134 move_pred_fn, void *);
135
136int __bch2_evacuate_bucket(struct moving_context *,
137 struct move_bucket_in_flight *,
138 struct bpos, int,
139 struct data_update_opts);
140int bch2_evacuate_bucket(struct bch_fs *, struct bpos, int,
141 struct data_update_opts,
142 struct bch_ratelimit *,
143 struct bch_move_stats *,
144 struct write_point_specifier,
145 bool);
146int bch2_data_job(struct bch_fs *,
147 struct bch_move_stats *,
148 struct bch_ioctl_data);
149
150void bch2_move_stats_to_text(struct printbuf *, struct bch_move_stats *);
151void bch2_move_stats_exit(struct bch_move_stats *, struct bch_fs *);
152void bch2_move_stats_init(struct bch_move_stats *, char *);
153
154void bch2_fs_moving_ctxts_to_text(struct printbuf *, struct bch_fs *);
155
156void bch2_fs_move_init(struct bch_fs *);
157
158#endif /* _BCACHEFS_MOVE_H */