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
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(&nfsd_svcstats, &nfsd_proc_fops);
98}
99
100void
101nfsd_stat_shutdown(void)
102{
103	svc_proc_unregister("nfsd");
104}
105