fs/xfs/scrub/stats.h

   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__ */