cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

iostat.h (2696B)

      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
      9struct 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
     18enum {
     19	READ_IO,
     20	WRITE_SYNC_IO,
     21	WRITE_ASYNC_IO,
     22	MAX_IO_TYPE,
     23};
     24
     25struct 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
     31extern int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
     32			void *offset);
     33extern void f2fs_reset_iostat(struct f2fs_sb_info *sbi);
     34extern void f2fs_update_iostat(struct f2fs_sb_info *sbi,
     35			enum iostat_type type, unsigned long long io_bytes);
     36
     37struct 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
     44static 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
     53static 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
     60extern void iostat_update_and_unbind_ctx(struct bio *bio, int rw);
     61extern void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
     62		struct bio *bio, struct bio_post_read_ctx *ctx);
     63extern int f2fs_init_iostat_processing(void);
     64extern void f2fs_destroy_iostat_processing(void);
     65extern int f2fs_init_iostat(struct f2fs_sb_info *sbi);
     66extern void f2fs_destroy_iostat(struct f2fs_sb_info *sbi);
     67#else
     68static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi,
     69		enum iostat_type type, unsigned long long io_bytes) {}
     70static inline void iostat_update_and_unbind_ctx(struct bio *bio, int rw) {}
     71static inline void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi,
     72		struct bio *bio, struct bio_post_read_ctx *ctx) {}
     73static inline void iostat_update_submit_ctx(struct bio *bio,
     74		enum page_type type) {}
     75static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio)
     76{
     77	return bio->bi_private;
     78}
     79static inline int f2fs_init_iostat_processing(void) { return 0; }
     80static inline void f2fs_destroy_iostat_processing(void) {}
     81static inline int f2fs_init_iostat(struct f2fs_sb_info *sbi) { return 0; }
     82static inline void f2fs_destroy_iostat(struct f2fs_sb_info *sbi) {}
     83#endif
     84#endif /* __F2FS_IOSTAT_H__ */