1/*
2 *  linux/fs/nfs/iostat.h
3 *
4 *  Declarations for NFS client per-mount statistics
5 *
6 *  Copyright (C) 2005, 2006 Chuck Lever <cel@netapp.com>
7 *
8 */
9
10#ifndef _NFS_IOSTAT
11#define _NFS_IOSTAT
12
13#include <linux/percpu.h>
14#include <linux/cache.h>
15#include <linux/nfs_iostat.h>
16
17struct nfs_iostats {
18	unsigned long long	bytes[__NFSIOS_BYTESMAX];
19#ifdef CONFIG_NFS_FSCACHE
20	unsigned long long	fscache[__NFSIOS_FSCACHEMAX];
21#endif
22	unsigned long		events[__NFSIOS_COUNTSMAX];
23} ____cacheline_aligned;
24
25static inline void nfs_inc_server_stats(const struct nfs_server *server,
26					enum nfs_stat_eventcounters stat)
27{
28	this_cpu_inc(server->io_stats->events[stat]);
29}
30
31static inline void nfs_inc_stats(const struct inode *inode,
32				 enum nfs_stat_eventcounters stat)
33{
34	nfs_inc_server_stats(NFS_SERVER(inode), stat);
35}
36
37static inline void nfs_add_server_stats(const struct nfs_server *server,
38					enum nfs_stat_bytecounters stat,
39					long addend)
40{
41	this_cpu_add(server->io_stats->bytes[stat], addend);
42}
43
44static inline void nfs_add_stats(const struct inode *inode,
45				 enum nfs_stat_bytecounters stat,
46				 long addend)
47{
48	nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
49}
50
51#ifdef CONFIG_NFS_FSCACHE
52static inline void nfs_add_fscache_stats(struct inode *inode,
53					 enum nfs_stat_fscachecounters stat,
54					 long addend)
55{
56	this_cpu_add(NFS_SERVER(inode)->io_stats->fscache[stat], addend);
57}
58static inline void nfs_inc_fscache_stats(struct inode *inode,
59					 enum nfs_stat_fscachecounters stat)
60{
61	this_cpu_inc(NFS_SERVER(inode)->io_stats->fscache[stat]);
62}
63#endif
64
65static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void)
66{
67	return alloc_percpu(struct nfs_iostats);
68}
69
70static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats)
71{
72	if (stats != NULL)
73		free_percpu(stats);
74}
75
76#endif /* _NFS_IOSTAT */
77