1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright 2021 Google LLC
4 * Author: Daeho Jeong <daehojeong@google.com>
6 #ifndef __F2FS_IOSTAT_H__
7 #define __F2FS_IOSTAT_H__
9 struct bio_post_read_ctx;
11 enum iostat_lat_type {
18 #ifdef CONFIG_F2FS_IOSTAT
20 #define NUM_PREALLOC_IOSTAT_CTXS 128
21 #define DEFAULT_IOSTAT_PERIOD_MS 3000
22 #define MIN_IOSTAT_PERIOD_MS 100
23 /* maximum period of iostat tracing is 1 day */
24 #define MAX_IOSTAT_PERIOD_MS 8640000
26 struct iostat_lat_info {
27 unsigned long sum_lat[MAX_IO_TYPE][NR_PAGE_TYPE]; /* sum of io latencies */
28 unsigned long peak_lat[MAX_IO_TYPE][NR_PAGE_TYPE]; /* peak io latency */
29 unsigned int bio_cnt[MAX_IO_TYPE][NR_PAGE_TYPE]; /* bio count */
32 extern int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
34 extern void f2fs_reset_iostat(struct f2fs_sb_info *sbi);
35 extern void f2fs_update_iostat(struct f2fs_sb_info *sbi, struct inode *inode,
36 enum iostat_type type, unsigned long long io_bytes);
38 struct bio_iostat_ctx {
39 struct f2fs_sb_info *sbi;
40 unsigned long submit_ts;
42 struct bio_post_read_ctx *post_read_ctx;
45 static inline void iostat_update_submit_ctx(struct bio *bio,
48 struct bio_iostat_ctx *iostat_ctx = bio->bi_private;
50 iostat_ctx->submit_ts = jiffies;
51 iostat_ctx->type = type;
54 static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)
56 struct bio_iostat_ctx *iostat_ctx = bio->bi_private;
58 return iostat_ctx->post_read_ctx;
61 extern void iostat_update_and_unbind_ctx(struct bio *bio);
62 extern void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
63 struct bio *bio, struct bio_post_read_ctx *ctx);
64 extern int f2fs_init_iostat_processing(void);
65 extern void f2fs_destroy_iostat_processing(void);
66 extern int f2fs_init_iostat(struct f2fs_sb_info *sbi);
67 extern void f2fs_destroy_iostat(struct f2fs_sb_info *sbi);
69 static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi, struct inode *inode,
70 enum iostat_type type, unsigned long long io_bytes) {}
71 static inline void iostat_update_and_unbind_ctx(struct bio *bio) {}
72 static inline void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
73 struct bio *bio, struct bio_post_read_ctx *ctx) {}
74 static inline void iostat_update_submit_ctx(struct bio *bio,
75 enum page_type type) {}
76 static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)
78 return bio->bi_private;
80 static inline int f2fs_init_iostat_processing(void) { return 0; }
81 static inline void f2fs_destroy_iostat_processing(void) {}
82 static inline int f2fs_init_iostat(struct f2fs_sb_info *sbi) { return 0; }
83 static inline void f2fs_destroy_iostat(struct f2fs_sb_info *sbi) {}
85 #endif /* __F2FS_IOSTAT_H__ */