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
31 struct nfsd_stats nfsdstats;
32 struct svc_stat nfsd_svcstats = {
33 .program = &nfsd_program,
34 };
35
nfsd_proc_show(struct seq_file * seq,void * v)36 static 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
nfsd_proc_open(struct inode * inode,struct file * file)81 static int nfsd_proc_open(struct inode *inode, struct file *file)
82 {
83 return single_open(file, nfsd_proc_show, NULL);
84 }
85
86 static 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
94 void
nfsd_stat_init(void)95 nfsd_stat_init(void)
96 {
97 svc_proc_register(&nfsd_svcstats, &nfsd_proc_fops);
98 }
99
100 void
nfsd_stat_shutdown(void)101 nfsd_stat_shutdown(void)
102 {
103 svc_proc_unregister("nfsd");
104 }
105