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Linux/fs/xfs/scrub/stats.h

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  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  * Copyright (C) 2023 Oracle.  All Rights Reserved.
  4  * Author: Darrick J. Wong <djwong@kernel.org>
  5  */
  6 #ifndef __XFS_SCRUB_STATS_H__
  7 #define __XFS_SCRUB_STATS_H__
  8 
  9 struct xchk_stats_run {
 10         u64                     scrub_ns;
 11         u64                     repair_ns;
 12         unsigned int            retries;
 13         bool                    repair_attempted;
 14         bool                    repair_succeeded;
 15 };
 16 
 17 #ifdef CONFIG_XFS_ONLINE_SCRUB_STATS
 18 struct xchk_stats;
 19 
 20 int __init xchk_global_stats_setup(struct dentry *parent);
 21 void xchk_global_stats_teardown(void);
 22 
 23 int xchk_mount_stats_alloc(struct xfs_mount *mp);
 24 void xchk_mount_stats_free(struct xfs_mount *mp);
 25 
 26 void xchk_stats_register(struct xchk_stats *cs, struct dentry *parent);
 27 void xchk_stats_unregister(struct xchk_stats *cs);
 28 
 29 void xchk_stats_merge(struct xfs_mount *mp, const struct xfs_scrub_metadata *sm,
 30                 const struct xchk_stats_run *run);
 31 
 32 static inline u64 xchk_stats_now(void) { return ktime_get_ns(); }
 33 static inline u64 xchk_stats_elapsed_ns(u64 since)
 34 {
 35         u64 now = xchk_stats_now();
 36 
 37         /*
 38          * If the system doesn't have a high enough resolution clock, charge at
 39          * least one nanosecond so that our stats don't report instantaneous
 40          * runtimes.
 41          */
 42         if (now == since)
 43                 return 1;
 44 
 45         return now - since;
 46 }
 47 #else
 48 # define xchk_global_stats_setup(parent)        (0)
 49 # define xchk_global_stats_teardown()           ((void)0)
 50 # define xchk_mount_stats_alloc(mp)             (0)
 51 # define xchk_mount_stats_free(mp)              ((void)0)
 52 # define xchk_stats_register(cs, parent)        ((void)0)
 53 # define xchk_stats_unregister(cs)              ((void)0)
 54 # define xchk_stats_now()                       (0)
 55 # define xchk_stats_elapsed_ns(x)               (0 * (x))
 56 # define xchk_stats_merge(mp, sm, run)          ((void)0)
 57 #endif /* CONFIG_XFS_ONLINE_SCRUB_STATS */
 58 
 59 #endif /* __XFS_SCRUB_STATS_H__ */
 60 

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