LXR linux/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-written>
  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 <net/net_namespace.h>
  28
  29#include "nfsd.h"
  30
  31struct nfsd_stats       nfsdstats;
  32struct svc_stat         nfsd_svcstats = {
  33        .program        = &nfsd_program,
  34};
  35
  36static 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
  81static int nfsd_proc_open(struct inode *inode, struct file *file)
  82{
  83        return single_open(file, nfsd_proc_show, NULL);
  84}
  85
  86static 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
  94void
  95nfsd_stat_init(void)
  96{
  97        svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_fops);
  98}
  99
 100void
 101nfsd_stat_shutdown(void)
 102{
 103        svc_proc_unregister(&init_net, "nfsd");
 104}
 105