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Diffstat (limited to 'fs/f2fs/iostat.h')
| -rw-r--r-- | fs/f2fs/iostat.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/fs/f2fs/iostat.h b/fs/f2fs/iostat.h new file mode 100644 index 000000000000..22a2d01f57ef --- /dev/null +++ b/fs/f2fs/iostat.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2021 Google LLC + * Author: Daeho Jeong <daehojeong@google.com> + */ +#ifndef __F2FS_IOSTAT_H__ +#define __F2FS_IOSTAT_H__ + +struct bio_post_read_ctx; + +#ifdef CONFIG_F2FS_IOSTAT + +#define DEFAULT_IOSTAT_PERIOD_MS 3000 +#define MIN_IOSTAT_PERIOD_MS 100 +/* maximum period of iostat tracing is 1 day */ +#define MAX_IOSTAT_PERIOD_MS 8640000 + +enum { + READ_IO, + WRITE_SYNC_IO, + WRITE_ASYNC_IO, + MAX_IO_TYPE, +}; + +struct iostat_lat_info { + unsigned long sum_lat[MAX_IO_TYPE][NR_PAGE_TYPE]; /* sum of io latencies */ + unsigned long peak_lat[MAX_IO_TYPE][NR_PAGE_TYPE]; /* peak io latency */ + unsigned int bio_cnt[MAX_IO_TYPE][NR_PAGE_TYPE]; /* bio count */ +}; + +extern int __maybe_unused iostat_info_seq_show(struct seq_file *seq, + void *offset); +extern void f2fs_reset_iostat(struct f2fs_sb_info *sbi); +extern void f2fs_update_iostat(struct f2fs_sb_info *sbi, + enum iostat_type type, unsigned long long io_bytes); + +struct bio_iostat_ctx { + struct f2fs_sb_info *sbi; + unsigned long submit_ts; + enum page_type type; + struct bio_post_read_ctx *post_read_ctx; +}; + +static inline void iostat_update_submit_ctx(struct bio *bio, + enum page_type type) +{ + struct bio_iostat_ctx *iostat_ctx = bio->bi_private; + + iostat_ctx->submit_ts = jiffies; + iostat_ctx->type = type; +} + +static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio) +{ + struct bio_iostat_ctx *iostat_ctx = bio->bi_private; + + return iostat_ctx->post_read_ctx; +} + +extern void iostat_update_and_unbind_ctx(struct bio *bio, int rw); +extern void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi, + struct bio *bio, struct bio_post_read_ctx *ctx); +extern int f2fs_init_iostat_processing(void); +extern void f2fs_destroy_iostat_processing(void); +extern int f2fs_init_iostat(struct f2fs_sb_info *sbi); +extern void f2fs_destroy_iostat(struct f2fs_sb_info *sbi); +#else +static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi, + enum iostat_type type, unsigned long long io_bytes) {} +static inline void iostat_update_and_unbind_ctx(struct bio *bio, int rw) {} +static inline void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi, + struct bio *bio, struct bio_post_read_ctx *ctx) {} +static inline void iostat_update_submit_ctx(struct bio *bio, + enum page_type type) {} +static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio) +{ + return bio->bi_private; +} +static inline int f2fs_init_iostat_processing(void) { return 0; } +static inline void f2fs_destroy_iostat_processing(void) {} +static inline int f2fs_init_iostat(struct f2fs_sb_info *sbi) { return 0; } +static inline void f2fs_destroy_iostat(struct f2fs_sb_info *sbi) {} +#endif +#endif /* __F2FS_IOSTAT_H__ */ |