1 /*
2  * linux/include/nfsd/stats.h
3  *
4  * Statistics for NFS server.
5  *
6  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
7  */
8 
9 #ifndef LINUX_NFSD_STATS_H
10 #define LINUX_NFSD_STATS_H
11 
12 struct nfsd_stats {
13 	unsigned int	rchits;		/* repcache hits */
14 	unsigned int	rcmisses;	/* repcache hits */
15 	unsigned int	rcnocache;	/* uncached reqs */
16 	unsigned int	fh_stale;	/* FH stale error */
17 	unsigned int	fh_lookup;	/* dentry cached */
18 	unsigned int	fh_anon;	/* anon file dentry returned */
19 	unsigned int	fh_nocache_dir;	/* filehandle not found in dcache */
20 	unsigned int	fh_nocache_nondir;	/* filehandle not found in dcache */
21 	unsigned int	io_read;	/* bytes returned to read requests */
22 	unsigned int	io_write;	/* bytes passed in write requests */
23 	unsigned int	th_cnt;		/* number of available threads */
24 	unsigned int	th_usage[10];	/* number of ticks during which n perdeciles
25 					 * of available threads were in use */
26 	unsigned int	th_fullcnt;	/* number of times last free thread was used */
27 	unsigned int	ra_size;	/* size of ra cache */
28 	unsigned int	ra_depth[11];	/* number of times ra entry was found that deep
29 					 * in the cache (10percentiles). [10] = not found */
30 };
31 
32 /* thread usage wraps very million seconds (approx one fortnight) */
33 #define	NFSD_USAGE_WRAP	(HZ*1000000)
34 
35 #ifdef __KERNEL__
36 
37 extern struct nfsd_stats	nfsdstats;
38 extern struct svc_stat		nfsd_svcstats;
39 
40 void	nfsd_stat_init(void);
41 void	nfsd_stat_shutdown(void);
42 
43 #endif /* __KERNEL__ */
44 #endif /* LINUX_NFSD_STATS_H */
45