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
12 struct bch_read_bio;
13
14 struct 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) \
61 do { \
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
75 typedef bool (*move_pred_fn)(struct bch_fs *, void *, struct bkey_s_c,
76 struct bch_io_opts *, struct data_update_opts *);
77
78 extern const char * const bch2_data_ops_strs[];
79
80 void bch2_moving_ctxt_exit(struct moving_context *);
81 void bch2_moving_ctxt_init(struct moving_context *, struct bch_fs *,
82 struct bch_ratelimit *, struct bch_move_stats *,
83 struct write_point_specifier, bool);
84 struct moving_io *bch2_moving_ctxt_next_pending_write(struct moving_context *);
85 void bch2_moving_ctxt_do_pending_writes(struct moving_context *);
86 void bch2_moving_ctxt_flush_all(struct moving_context *);
87 void bch2_move_ctxt_wait_for_io(struct moving_context *);
88 int bch2_move_ratelimit(struct moving_context *);
89
90 /* Inodes in different snapshots may have different IO options: */
91 struct snapshot_io_opts_entry {
92 u32 snapshot;
93 struct bch_io_opts io_opts;
94 };
95
96 struct per_snapshot_io_opts {
97 u64 cur_inum;
98 struct bch_io_opts fs_io_opts;
99 DARRAY(struct snapshot_io_opts_entry) d;
100 };
101
102 static inline void per_snapshot_io_opts_init(struct per_snapshot_io_opts *io_opts, struct bch_fs *c)
103 {
104 memset(io_opts, 0, sizeof(*io_opts));
105 io_opts->fs_io_opts = bch2_opts_to_inode_opts(c->opts);
106 }
107
108 static inline void per_snapshot_io_opts_exit(struct per_snapshot_io_opts *io_opts)
109 {
110 darray_exit(&io_opts->d);
111 }
112
113 struct bch_io_opts *bch2_move_get_io_opts(struct btree_trans *,
114 struct per_snapshot_io_opts *, struct bkey_s_c);
115 int bch2_move_get_io_opts_one(struct btree_trans *, struct bch_io_opts *, struct bkey_s_c);
116
117 int bch2_scan_old_btree_nodes(struct bch_fs *, struct bch_move_stats *);
118
119 int bch2_move_extent(struct moving_context *,
120 struct move_bucket_in_flight *,
121 struct btree_iter *,
122 struct bkey_s_c,
123 struct bch_io_opts,
124 struct data_update_opts);
125
126 int __bch2_move_data(struct moving_context *,
127 struct bbpos,
128 struct bbpos,
129 move_pred_fn, void *);
130 int bch2_move_data(struct bch_fs *,
131 struct bbpos start,
132 struct bbpos end,
133 struct bch_ratelimit *,
134 struct bch_move_stats *,
135 struct write_point_specifier,
136 bool,
137 move_pred_fn, void *);
138
139 int bch2_evacuate_bucket(struct moving_context *,
140 struct move_bucket_in_flight *,
141 struct bpos, int,
142 struct data_update_opts);
143 int bch2_data_job(struct bch_fs *,
144 struct bch_move_stats *,
145 struct bch_ioctl_data);
146
147 void bch2_move_stats_to_text(struct printbuf *, struct bch_move_stats *);
148 void bch2_move_stats_exit(struct bch_move_stats *, struct bch_fs *);
149 void bch2_move_stats_init(struct bch_move_stats *, const char *);
150
151 void bch2_fs_moving_ctxts_to_text(struct printbuf *, struct bch_fs *);
152
153 void bch2_fs_move_init(struct bch_fs *);
154
155 #endif /* _BCACHEFS_MOVE_H */
156
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