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, 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 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 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 68 static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi, 69 enum iostat_type type, unsigned long long io_bytes) {} 70 static inline void iostat_update_and_unbind_ctx(struct bio *bio, int rw) {} 71 static inline void iostat_alloc_and_bind_ctx(struct f2fs_sb_info *sbi, 72 struct bio *bio, struct bio_post_read_ctx *ctx) {} 73 static inline void iostat_update_submit_ctx(struct bio *bio, 74 enum page_type type) {} 75 static inline struct bio_post_read_ctx *get_post_read_ctx(struct bio *bio) 76 { 77 return bio->bi_private; 78 } 79 static inline int f2fs_init_iostat_processing(void) { return 0; } 80 static inline void f2fs_destroy_iostat_processing(void) {} 81 static inline int f2fs_init_iostat(struct f2fs_sb_info *sbi) { return 0; } 82 static inline void f2fs_destroy_iostat(struct f2fs_sb_info *sbi) {} 83 #endif 84 #endif /* __F2FS_IOSTAT_H__ */ 85