/*
* linux/fs/nfs/iostat.h
*
* Declarations for NFS client per-mount statistics
*
* Copyright (C) 2005, 2006 Chuck Lever
*
*/

#ifndef _NFS_IOSTAT
#define _NFS_IOSTAT

#include #include #include

struct nfs_iostats {
unsigned long long bytes[__NFSIOS_BYTESMAX];
#ifdef CONFIG_NFS_FSCACHE
unsigned long long fscache[__NFSIOS_FSCACHEMAX];
#endif
unsigned long events[__NFSIOS_COUNTSMAX];
} ____cacheline_aligned;

static inline void nfs_inc_server_stats(const struct nfs_server *server,
enum nfs_stat_eventcounters stat)
{
struct nfs_iostats *iostats;
int cpu;

cpu = get_cpu();
iostats = per_cpu_ptr(server->io_stats, cpu);
iostats->events[stat]++;
put_cpu();
}

static inline void nfs_inc_stats(const struct inode *inode,
enum nfs_stat_eventcounters stat)
{
nfs_inc_server_stats(NFS_SERVER(inode), stat);
}

static inline void nfs_add_server_stats(const struct nfs_server *server,
enum nfs_stat_bytecounters stat,
unsigned long addend)
{
struct nfs_iostats *iostats;
int cpu;

cpu = get_cpu();
iostats = per_cpu_ptr(server->io_stats, cpu);
iostats->bytes[stat] += addend;
put_cpu();
}

static inline void nfs_add_stats(const struct inode *inode,
enum nfs_stat_bytecounters stat,
unsigned long addend)
{
nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
}

#ifdef CONFIG_NFS_FSCACHE
static inline void nfs_add_fscache_stats(struct inode *inode,
enum nfs_stat_fscachecounters stat,
unsigned long addend)
{
struct nfs_iostats *iostats;
int cpu;

cpu = get_cpu();
iostats = per_cpu_ptr(NFS_SERVER(inode)->io_stats, cpu);
iostats->fscache[stat] += addend;
put_cpu();
}
#endif

static inline struct nfs_iostats *nfs_alloc_iostats(void)
{
return alloc_percpu(struct nfs_iostats);
}

static inline void nfs_free_iostats(struct nfs_iostats *stats)
{
if (stats != NULL)
free_percpu(stats);
}

#endif /* _NFS_IOSTAT */

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