Line data    Source code

       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   883411363 : static inline u64 xchk_stats_now(void) { return ktime_get_ns(); }
      33             : static inline u64 xchk_stats_elapsed_ns(u64 since)
      34             : {
      35   883453781 :         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   884475924 :         if (now == since)
      43             :                 return 1;
      44             : 
      45   884475924 :         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__ */