1/*
2 * linux/fs/nfsd/stats.c
3 *
4 * procfs-based user access to knfsd statistics
5 *
6 * /proc/net/rpc/nfsd
7 *
8 * Format:
9 *	rc <hits> <misses> <nocache>
10 *			Statistsics for the reply cache
11 *	fh <stale> <total-lookups> <anonlookups> <dir-not-in-dcache> <nondir-not-in-dcache>
12 *			statistics for filehandle lookup
13 *	io <bytes-read> <bytes-writtten>
14 *			statistics for IO throughput
15 *	th <threads> <fullcnt> <10%-20%> <20%-30%> ... <90%-100%> <100%>
16 *			time (seconds) when nfsd thread usage above thresholds
17 *			and number of times that all threads were in use
18 *	ra cache-size  <10%  <20%  <30% ... <100% not-found
19 *			number of times that read-ahead entry was found that deep in
20 *			the cache.
21 *	plus generic RPC stats (see net/sunrpc/stats.c)
22 *
23 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
24 */
25
26#include <linux/kernel.h>
27#include <linux/time.h>
28#include <linux/proc_fs.h>
29#include <linux/seq_file.h>
30#include <linux/stat.h>
31#include <linux/module.h>
32
33#include <linux/sunrpc/svc.h>
34#include <linux/sunrpc/stats.h>
35#include <linux/nfsd/nfsd.h>
36#include <linux/nfsd/stats.h>
37
38struct nfsd_stats	nfsdstats;
39struct svc_stat		nfsd_svcstats = {
40	.program	= &nfsd_program,
41};
42
43static int nfsd_proc_show(struct seq_file *seq, void *v)
44{
45	int i;
46
47	seq_printf(seq, "rc %u %u %u\nfh %u %u %u %u %u\nio %u %u\n",
48		      nfsdstats.rchits,
49		      nfsdstats.rcmisses,
50		      nfsdstats.rcnocache,
51		      nfsdstats.fh_stale,
52		      nfsdstats.fh_lookup,
53		      nfsdstats.fh_anon,
54		      nfsdstats.fh_nocache_dir,
55		      nfsdstats.fh_nocache_nondir,
56		      nfsdstats.io_read,
57		      nfsdstats.io_write);
58	/* thread usage: */
59	seq_printf(seq, "th %u %u", nfsdstats.th_cnt, nfsdstats.th_fullcnt);
60	for (i=0; i<10; i++) {
61		unsigned int jifs = nfsdstats.th_usage[i];
62		unsigned int sec = jifs / HZ, msec = (jifs % HZ)*1000/HZ;
63		seq_printf(seq, " %u.%03u", sec, msec);
64	}
65
66	/* newline and ra-cache */
67	seq_printf(seq, "\nra %u", nfsdstats.ra_size);
68	for (i=0; i<11; i++)
69		seq_printf(seq, " %u", nfsdstats.ra_depth[i]);
70	seq_putc(seq, '\n');
71
72	/* show my rpc info */
73	svc_seq_show(seq, &nfsd_svcstats);
74
75#ifdef CONFIG_NFSD_V4
76	/* Show count for individual nfsv4 operations */
77	/* Writing operation numbers 0 1 2 also for maintaining uniformity */
78	seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
79	for (i = 0; i <= LAST_NFS4_OP; i++)
80		seq_printf(seq, " %u", nfsdstats.nfs4_opcount[i]);
81
82	seq_putc(seq, '\n');
83#endif
84
85	return 0;
86}
87
88static int nfsd_proc_open(struct inode *inode, struct file *file)
89{
90	return single_open(file, nfsd_proc_show, NULL);
91}
92
93static const struct file_operations nfsd_proc_fops = {
94	.owner = THIS_MODULE,
95	.open = nfsd_proc_open,
96	.read  = seq_read,
97	.llseek = seq_lseek,
98	.release = single_release,
99};
100
101void
102nfsd_stat_init(void)
103{
104	svc_proc_register(&nfsd_svcstats, &nfsd_proc_fops);
105}
106
107void
108nfsd_stat_shutdown(void)
109{
110	svc_proc_unregister("nfsd");
111}
112