1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 *  linux/fs/nfs/iostat.h
4 *
5 *  Declarations for NFS client per-mount statistics
6 *
7 *  Copyright (C) 2005, 2006 Chuck Lever <cel@netapp.com>
8 *
9 */
10
11#ifndef _NFS_IOSTAT
12#define _NFS_IOSTAT
13
14#include <linux/percpu.h>
15#include <linux/cache.h>
16#include <linux/nfs_iostat.h>
17
18struct nfs_iostats {
19	unsigned long long	bytes[__NFSIOS_BYTESMAX];
20	unsigned long		events[__NFSIOS_COUNTSMAX];
21} ____cacheline_aligned;
22
23static inline void nfs_inc_server_stats(const struct nfs_server *server,
24					enum nfs_stat_eventcounters stat)
25{
26	this_cpu_inc(server->io_stats->events[stat]);
27}
28
29static inline void nfs_inc_stats(const struct inode *inode,
30				 enum nfs_stat_eventcounters stat)
31{
32	nfs_inc_server_stats(NFS_SERVER(inode), stat);
33}
34
35static inline void nfs_add_server_stats(const struct nfs_server *server,
36					enum nfs_stat_bytecounters stat,
37					long addend)
38{
39	this_cpu_add(server->io_stats->bytes[stat], addend);
40}
41
42static inline void nfs_add_stats(const struct inode *inode,
43				 enum nfs_stat_bytecounters stat,
44				 long addend)
45{
46	nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
47}
48
49static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void)
50{
51	return alloc_percpu(struct nfs_iostats);
52}
53
54static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats)
55{
56	if (stats != NULL)
57		free_percpu(stats);
58}
59
60#endif /* _NFS_IOSTAT */
61