1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright 2021 Google LLC
4 * Author: Daeho Jeong <daehojeong@google.com>
5 */
6 #ifndef __F2FS_IOSTAT_H__
7 #define __F2FS_IOSTAT_H__
8
9 struct bio_post_read_ctx;
10
11 #ifdef CONFIG_F2FS_IOSTAT
12
13 #define DEFAULT_IOSTAT_PERIOD_MS 3000
14 #define MIN_IOSTAT_PERIOD_MS 100
15 /* maximum period of iostat tracing is 1 day */
16 #define MAX_IOSTAT_PERIOD_MS 8640000
17
18 enum {
19 READ_IO,
20 WRITE_SYNC_IO,
21 WRITE_ASYNC_IO,
22 MAX_IO_TYPE,
23 };
24
25 struct iostat_lat_info {
26 unsigned long sum_lat[MAX_IO_TYPE][NR_PAGE_TYPE]; /* sum of io latencies */
27 unsigned long peak_lat[MAX_IO_TYPE][NR_PAGE_TYPE]; /* peak io latency */
28 unsigned int bio_cnt[MAX_IO_TYPE][NR_PAGE_TYPE]; /* bio count */
29 };
30
31 extern int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
32 void *offset);
33 extern void f2fs_reset_iostat(struct f2fs_sb_info *sbi);
34 extern void f2fs_update_iostat(struct f2fs_sb_info *sbi, struct inode *inode,
35 enum iostat_type type, unsigned long long io_bytes);
36
37 struct bio_iostat_ctx {
38 struct f2fs_sb_info *sbi;
39 unsigned long submit_ts;
40 enum page_type type;
41 struct bio_post_read_ctx *post_read_ctx;
42 };
43
iostat_update_submit_ctx(struct bio * bio,enum page_type type)44 static inline void iostat_update_submit_ctx(struct bio *bio,
45 enum page_type type)
46 {
47 struct bio_iostat_ctx *iostat_ctx = bio->bi_private;
48
49 iostat_ctx->submit_ts = jiffies;
50 iostat_ctx->type = type;
51 }
52
get_post_read_ctx(struct bio * bio)53 static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)
54 {
55 struct bio_iostat_ctx *iostat_ctx = bio->bi_private;
56
57 return iostat_ctx->post_read_ctx;
58 }
59
60 extern void iostat_update_and_unbind_ctx(struct bio *bio, int rw);
61 extern void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
62 struct bio *bio, struct bio_post_read_ctx *ctx);
63 extern int f2fs_init_iostat_processing(void);
64 extern void f2fs_destroy_iostat_processing(void);
65 extern int f2fs_init_iostat(struct f2fs_sb_info *sbi);
66 extern void f2fs_destroy_iostat(struct f2fs_sb_info *sbi);
67 #else
f2fs_update_iostat(struct f2fs_sb_info * sbi,struct inode * inode,enum iostat_type type,unsigned long long io_bytes)68 static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi, struct inode *inode,
69 enum iostat_type type, unsigned long long io_bytes) {}
iostat_update_and_unbind_ctx(struct bio * bio,int rw)70 static inline void iostat_update_and_unbind_ctx(struct bio *bio, int rw) {}
iostat_alloc_and_bind_ctx(struct f2fs_sb_info * sbi,struct bio * bio,struct bio_post_read_ctx * ctx)71 static inline void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
72 struct bio *bio, struct bio_post_read_ctx *ctx) {}
iostat_update_submit_ctx(struct bio * bio,enum page_type type)73 static inline void iostat_update_submit_ctx(struct bio *bio,
74 enum page_type type) {}
get_post_read_ctx(struct bio * bio)75 static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)
76 {
77 return bio->bi_private;
78 }
f2fs_init_iostat_processing(void)79 static inline int f2fs_init_iostat_processing(void) { return 0; }
f2fs_destroy_iostat_processing(void)80 static inline void f2fs_destroy_iostat_processing(void) {}
f2fs_init_iostat(struct f2fs_sb_info * sbi)81 static inline int f2fs_init_iostat(struct f2fs_sb_info *sbi) { return 0; }
f2fs_destroy_iostat(struct f2fs_sb_info * sbi)82 static inline void f2fs_destroy_iostat(struct f2fs_sb_info *sbi) {}
83 #endif
84 #endif /* __F2FS_IOSTAT_H__ */
85
