86 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Copyright 2021 Google LLC4 * Author: Daeho Jeong <daehojeong@google.com>5 */6#ifndef __F2FS_IOSTAT_H__7#define __F2FS_IOSTAT_H__8 9struct bio_post_read_ctx;10 11enum iostat_lat_type {12 READ_IO = 0,13 WRITE_SYNC_IO,14 WRITE_ASYNC_IO,15 MAX_IO_TYPE,16};17 18#ifdef CONFIG_F2FS_IOSTAT19 20#define NUM_PREALLOC_IOSTAT_CTXS 12821#define DEFAULT_IOSTAT_PERIOD_MS 300022#define MIN_IOSTAT_PERIOD_MS 10023/* maximum period of iostat tracing is 1 day */24#define MAX_IOSTAT_PERIOD_MS 864000025 26struct 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 */30};31 32extern int __maybe_unused iostat_info_seq_show(struct seq_file *seq,33 void *offset);34extern void f2fs_reset_iostat(struct f2fs_sb_info *sbi);35extern void f2fs_update_iostat(struct f2fs_sb_info *sbi, struct inode *inode,36 enum iostat_type type, unsigned long long io_bytes);37 38struct bio_iostat_ctx {39 struct f2fs_sb_info *sbi;40 unsigned long submit_ts;41 enum page_type type;42 struct bio_post_read_ctx *post_read_ctx;43};44 45static inline void iostat_update_submit_ctx(struct bio *bio,46 enum page_type type)47{48 struct bio_iostat_ctx *iostat_ctx = bio->bi_private;49 50 iostat_ctx->submit_ts = jiffies;51 iostat_ctx->type = type;52}53 54static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)55{56 struct bio_iostat_ctx *iostat_ctx = bio->bi_private;57 58 return iostat_ctx->post_read_ctx;59}60 61extern void iostat_update_and_unbind_ctx(struct bio *bio);62extern void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,63 struct bio *bio, struct bio_post_read_ctx *ctx);64extern int f2fs_init_iostat_processing(void);65extern void f2fs_destroy_iostat_processing(void);66extern int f2fs_init_iostat(struct f2fs_sb_info *sbi);67extern void f2fs_destroy_iostat(struct f2fs_sb_info *sbi);68#else69static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi, struct inode *inode,70 enum iostat_type type, unsigned long long io_bytes) {}71static inline void iostat_update_and_unbind_ctx(struct bio *bio) {}72static inline void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,73 struct bio *bio, struct bio_post_read_ctx *ctx) {}74static inline void iostat_update_submit_ctx(struct bio *bio,75 enum page_type type) {}76static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)77{78 return bio->bi_private;79}80static inline int f2fs_init_iostat_processing(void) { return 0; }81static inline void f2fs_destroy_iostat_processing(void) {}82static inline int f2fs_init_iostat(struct f2fs_sb_info *sbi) { return 0; }83static inline void f2fs_destroy_iostat(struct f2fs_sb_info *sbi) {}84#endif85#endif /* __F2FS_IOSTAT_H__ */86