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

   */
  
  #ifndef _NFS_IOSTAT
  #define _NFS_IOSTAT

  #include <linux/percpu.h>
  #include <linux/cache.h>

  #include <linux/nfs_iostat.h>

  
  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)

  {

  	this_cpu_inc(server->io_stats->events[stat]);

  }

  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,

  					long addend)

  {

  	this_cpu_add(server->io_stats->bytes[stat], addend);

  }

  static inline void nfs_add_stats(const struct inode *inode,

  				 enum nfs_stat_bytecounters stat,

  				 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,

  					 long addend)

  {

  	this_cpu_add(NFS_SERVER(inode)->io_stats->fscache[stat], addend);

  }
  #endif

  static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void)

  {
  	return alloc_percpu(struct nfs_iostats);
  }

  static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats)

  {

  	if (stats != NULL)
  		free_percpu(stats);

  }

  #endif /* _NFS_IOSTAT */