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
9struct 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
18struct xchk_stats;
19
20int __init xchk_global_stats_setup(struct dentry *parent);
21void xchk_global_stats_teardown(void);
22
23int xchk_mount_stats_alloc(struct xfs_mount *mp);
24void xchk_mount_stats_free(struct xfs_mount *mp);
25
26void xchk_stats_register(struct xchk_stats *cs, struct dentry *parent);
27void xchk_stats_unregister(struct xchk_stats *cs);
28
29void xchk_stats_merge(struct xfs_mount *mp, const struct xfs_scrub_metadata *sm,
30		const struct xchk_stats_run *run);
31
32static inline u64 xchk_stats_now(void) { return ktime_get_ns(); }
33static 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