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
30static 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
74DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
75
76struct proc_dir_entry *nfsd_proc_stat_init(struct net *net)
77{
78	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
79
80	return svc_proc_register(net, &nn->nfsd_svcstats, &nfsd_proc_ops);
81}
82
83void nfsd_proc_stat_shutdown(struct net *net)
84{
85	svc_proc_unregister(net, "nfsd");
86}