fs/nfsd/stats.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * procfs-based user access to knfsd statistics
   4  *
   5  * /proc/net/rpc/nfsd
   6  *
   7  * Format:
   8  *      rc <hits> <misses> <nocache>
   9  *                      Statistsics for the reply cache
  10  *      fh <stale> <deprecated filehandle cache stats>
  11  *                      statistics for filehandle lookup
  12  *      io <bytes-read> <bytes-written>
  13  *                      statistics for IO throughput
  14  *      th <threads> <deprecated thread usage histogram stats>
  15  *                      number of threads
  16  *      ra <deprecated ra-cache stats>
  17  *
  18  *      plus generic RPC stats (see net/sunrpc/stats.c)
  19  *
  20  * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
  21  */
  22
  23 #include <linux/seq_file.h>
  24 #include <linux/module.h>
  25 #include <linux/sunrpc/stats.h>
  26 #include <net/net_namespace.h>
  27
  28 #include "nfsd.h"
  29
  30 static int nfsd_show(struct seq_file *seq, void *v)
  31 {
  32         struct net *net = pde_data(file_inode(seq->file));
  33         struct nfsd_net *nn = net_generic(net, nfsd_net_id);
  34         int i;
  35
  36         seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
  37                    percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_HITS]),
  38                    percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_MISSES]),
  39                    percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_NOCACHE]),
  40                    percpu_counter_sum_positive(&nn->counter[NFSD_STATS_FH_STALE]),
  41                    percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_READ]),
  42                    percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_WRITE]));
  43
  44         /* thread usage: */
  45         seq_printf(seq, "th %u 0", atomic_read(&nfsd_th_cnt));
  46
  47         /* deprecated thread usage histogram stats */
  48         for (i = 0; i < 10; i++)
  49                 seq_puts(seq, " 0.000");
  50
  51         /* deprecated ra-cache stats */
  52         seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n");
  53
  54         /* show my rpc info */
  55         svc_seq_show(seq, &nn->nfsd_svcstats);
  56
  57 #ifdef CONFIG_NFSD_V4
  58         /* Show count for individual nfsv4 operations */
  59         /* Writing operation numbers 0 1 2 also for maintaining uniformity */
  60         seq_printf(seq, "proc4ops %u", LAST_NFS4_OP + 1);
  61         for (i = 0; i <= LAST_NFS4_OP; i++) {
  62                 seq_printf(seq, " %lld",
  63                            percpu_counter_sum_positive(&nn->counter[NFSD_STATS_NFS4_OP(i)]));
  64         }
  65         seq_printf(seq, "\nwdeleg_getattr %lld",
  66                 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_WDELEG_GETATTR]));
  67
  68         seq_putc(seq, '\n');
  69 #endif
  70
  71         return 0;
  72 }
  73
  74 DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
  75
  76 void nfsd_proc_stat_init(struct net *net)
  77 {
  78         struct nfsd_net *nn = net_generic(net, nfsd_net_id);
  79
  80         svc_proc_register(net, &nn->nfsd_svcstats, &nfsd_proc_ops);
  81 }
  82
  83 void nfsd_proc_stat_shutdown(struct net *net)
  84 {
  85         svc_proc_unregister(net, "nfsd");
  86 }