[net-next-2.6.git] / fs / nfs / iostat.h

/*
 *  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];
	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_no_resched();
}

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_no_resched();
}

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);
}

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 */
Commit	Line	Data
d9ef5a8c CL	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	*
d9ef5a8c CL	8	*/
	9
	10	#ifndef _NFS_IOSTAT
	11	#define _NFS_IOSTAT
	12
d9ef5a8c CL	13	#include <linux/percpu.h>
d9ef5a8c CL	14	#include <linux/cache.h>
34e8f928	15	#include <linux/nfs_iostat.h>
d9ef5a8c CL	16
	17	struct nfs_iostats {
	18	unsigned long long bytes[__NFSIOS_BYTESMAX];
	19	unsigned long events[__NFSIOS_COUNTSMAX];
	20	} ____cacheline_aligned;
	21
2e96d286	22	static inline void nfs_inc_server_stats(const struct nfs_server *server,
34e8f928	23	enum nfs_stat_eventcounters stat)
d9ef5a8c CL	24	{
	25	struct nfs_iostats *iostats;
	26	int cpu;
	27
	28	cpu = get_cpu();
006ea73e	29	iostats = per_cpu_ptr(server->io_stats, cpu);
34e8f928	30	iostats->events[stat]++;
d9ef5a8c CL	31	put_cpu_no_resched();
	32	}
	33
2e96d286	34	static inline void nfs_inc_stats(const struct inode *inode,
34e8f928	35	enum nfs_stat_eventcounters stat)
006ea73e CL	36	{
	37	nfs_inc_server_stats(NFS_SERVER(inode), stat);
	38	}
	39
2e96d286	40	static inline void nfs_add_server_stats(const struct nfs_server *server,
34e8f928 CL	41	enum nfs_stat_bytecounters stat,
34e8f928 CL	42	unsigned long addend)
d9ef5a8c CL	43	{
	44	struct nfs_iostats *iostats;
	45	int cpu;
	46
	47	cpu = get_cpu();
006ea73e	48	iostats = per_cpu_ptr(server->io_stats, cpu);
d9ef5a8c CL	49	iostats->bytes[stat] += addend;
	50	put_cpu_no_resched();
	51	}
	52
2e96d286	53	static inline void nfs_add_stats(const struct inode *inode,
34e8f928 CL	54	enum nfs_stat_bytecounters stat,
34e8f928 CL	55	unsigned long addend)
006ea73e CL	56	{
	57	nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
	58	}
	59
d9ef5a8c CL	60	static inline struct nfs_iostats *nfs_alloc_iostats(void)
	61	{
	62	return alloc_percpu(struct nfs_iostats);
	63	}
	64
	65	static inline void nfs_free_iostats(struct nfs_iostats *stats)
	66	{
01d0ae8b TM	67	if (stats != NULL)
01d0ae8b TM	68	free_percpu(stats);
d9ef5a8c CL	69	}
d9ef5a8c CL	70
34e8f928	71	#endif /* _NFS_IOSTAT */