release/src-rt-6.x.4708/linux/linux-2.6.36/fs/nfsd/stats.c

   1 /*
   2  * procfs-based user access to knfsd statistics
   3  *
   4  * /proc/net/rpc/nfsd
   5  *
   6  * Format:
   7  *      rc <hits> <misses> <nocache>
   8  *                      Statistsics for the reply cache
   9  *      fh <stale> <total-lookups> <anonlookups> <dir-not-in-dcache> <nondir-not-in-dcache>
  10  *                      statistics for filehandle lookup
  11  *      io <bytes-read> <bytes-writtten>
  12  *                      statistics for IO throughput
  13  *      th <threads> <fullcnt> <10%-20%> <20%-30%> ... <90%-100%> <100%>
  14  *                      time (seconds) when nfsd thread usage above thresholds
  15  *                      and number of times that all threads were in use
  16  *      ra cache-size  <10%  <20%  <30% ... <100% not-found
  17  *                      number of times that read-ahead entry was found that deep in
  18  *                      the cache.
  19  *      plus generic RPC stats (see net/sunrpc/stats.c)
  20  *
  21  * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
  22  */
  23
  24 #include <linux/seq_file.h>
  25 #include <linux/module.h>
  26 #include <linux/sunrpc/stats.h>
  27 #include <linux/nfsd/stats.h>
  28
  29 #include "nfsd.h"
  30
  31 struct nfsd_stats       nfsdstats;
  32 struct svc_stat         nfsd_svcstats = {
  33         .program        = &nfsd_program,
  34 };
  35
  36 static int nfsd_proc_show(struct seq_file *seq, void *v)
  37 {
  38         int i;
  39
  40         seq_printf(seq, "rc %u %u %u\nfh %u %u %u %u %u\nio %u %u\n",
  41                       nfsdstats.rchits,
  42                       nfsdstats.rcmisses,
  43                       nfsdstats.rcnocache,
  44                       nfsdstats.fh_stale,
  45                       nfsdstats.fh_lookup,
  46                       nfsdstats.fh_anon,
  47                       nfsdstats.fh_nocache_dir,
  48                       nfsdstats.fh_nocache_nondir,
  49                       nfsdstats.io_read,
  50                       nfsdstats.io_write);
  51         /* thread usage: */
  52         seq_printf(seq, "th %u %u", nfsdstats.th_cnt, nfsdstats.th_fullcnt);
  53         for (i=0; i<10; i++) {
  54                 unsigned int jifs = nfsdstats.th_usage[i];
  55                 unsigned int sec = jifs / HZ, msec = (jifs % HZ)*1000/HZ;
  56                 seq_printf(seq, " %u.%03u", sec, msec);
  57         }
  58
  59         /* newline and ra-cache */
  60         seq_printf(seq, "\nra %u", nfsdstats.ra_size);
  61         for (i=0; i<11; i++)
  62                 seq_printf(seq, " %u", nfsdstats.ra_depth[i]);
  63         seq_putc(seq, '\n');
  64
  65         /* show my rpc info */
  66         svc_seq_show(seq, &nfsd_svcstats);
  67
  68 #ifdef CONFIG_NFSD_V4
  69         /* Show count for individual nfsv4 operations */
  70         /* Writing operation numbers 0 1 2 also for maintaining uniformity */
  71         seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
  72         for (i = 0; i <= LAST_NFS4_OP; i++)
  73                 seq_printf(seq, " %u", nfsdstats.nfs4_opcount[i]);
  74
  75         seq_putc(seq, '\n');
  76 #endif
  77
  78         return 0;
  79 }
  80
  81 static int nfsd_proc_open(struct inode *inode, struct file *file)
  82 {
  83         return single_open(file, nfsd_proc_show, NULL);
  84 }
  85
  86 static const struct file_operations nfsd_proc_fops = {
  87         .owner = THIS_MODULE,
  88         .open = nfsd_proc_open,
  89         .read  = seq_read,
  90         .llseek = seq_lseek,
  91         .release = single_release,
  92 };
  93
  94 void
  95 nfsd_stat_init(void)
  96 {
  97         svc_proc_register(&nfsd_svcstats, &nfsd_proc_fops);
  98 }
  99
 100 void
 101 nfsd_stat_shutdown(void)
 102 {
 103         svc_proc_unregister("nfsd");
 104 }