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