release/src-rt-6.x.4708/linux/linux-2.6.36/include/linux/nfsd/stats.h

   1 /*
   2  * linux/include/linux/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 #include <linux/nfs4.h>
  13
  14 /* thread usage wraps very million seconds (approx one fortnight) */
  15 #define NFSD_USAGE_WRAP (HZ*1000000)
  16
  17 #ifdef __KERNEL__
  18
  19 struct nfsd_stats {
  20         unsigned int    rchits;         /* repcache hits */
  21         unsigned int    rcmisses;       /* repcache hits */
  22         unsigned int    rcnocache;      /* uncached reqs */
  23         unsigned int    fh_stale;       /* FH stale error */
  24         unsigned int    fh_lookup;      /* dentry cached */
  25         unsigned int    fh_anon;        /* anon file dentry returned */
  26         unsigned int    fh_nocache_dir; /* filehandle not found in dcache */
  27         unsigned int    fh_nocache_nondir;      /* filehandle not found in dcache */
  28         unsigned int    io_read;        /* bytes returned to read requests */
  29         unsigned int    io_write;       /* bytes passed in write requests */
  30         unsigned int    th_cnt;         /* number of available threads */
  31         unsigned int    th_usage[10];   /* number of ticks during which n perdeciles
  32                                          * of available threads were in use */
  33         unsigned int    th_fullcnt;     /* number of times last free thread was used */
  34         unsigned int    ra_size;        /* size of ra cache */
  35         unsigned int    ra_depth[11];   /* number of times ra entry was found that deep
  36                                          * in the cache (10percentiles). [10] = not found */
  37 #ifdef CONFIG_NFSD_V4
  38         unsigned int    nfs4_opcount[LAST_NFS4_OP + 1]; /* count of individual nfsv4 operations */
  39 #endif
  40
  41 };
  42
  43
  44 extern struct nfsd_stats        nfsdstats;
  45 extern struct svc_stat          nfsd_svcstats;
  46
  47 void    nfsd_stat_init(void);
  48 void    nfsd_stat_shutdown(void);
  49
  50 #endif /* __KERNEL__ */
  51 #endif /* LINUX_NFSD_STATS_H */