Root/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 <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

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