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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#include <net/net_namespace.h>
29
30#include "nfsd.h"
31
32struct nfsd_stats nfsdstats;
33struct svc_stat nfsd_svcstats = {
34 .program = &nfsd_program,
35};
36
37static 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
82static int nfsd_proc_open(struct inode *inode, struct file *file)
83{
84 return single_open(file, nfsd_proc_show, NULL);
85}
86
87static const struct file_operations nfsd_proc_fops = {
88 .owner = THIS_MODULE,
89 .open = nfsd_proc_open,
90 .read = seq_read,
91 .llseek = seq_lseek,
92 .release = single_release,
93};
94
95void
96nfsd_stat_init(void)
97{
98 svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_fops);
99}
100
101void
102nfsd_stat_shutdown(void)
103{
104 svc_proc_unregister(&init_net, "nfsd");
105}
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> <deprecated filehandle cache stats>
11 * statistics for filehandle lookup
12 * io <bytes-read> <bytes-written>
13 * statistics for IO throughput
14 * th <threads> <deprecated thread usage histogram stats>
15 * number of threads
16 * ra <deprecated ra-cache stats>
17 *
18 * plus generic RPC stats (see net/sunrpc/stats.c)
19 *
20 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
21 */
22
23#include <linux/seq_file.h>
24#include <linux/module.h>
25#include <linux/sunrpc/stats.h>
26#include <net/net_namespace.h>
27
28#include "nfsd.h"
29
30struct nfsd_stats nfsdstats;
31struct svc_stat nfsd_svcstats = {
32 .program = &nfsd_program,
33};
34
35static int nfsd_show(struct seq_file *seq, void *v)
36{
37 int i;
38
39 seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
40 percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_HITS]),
41 percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_MISSES]),
42 percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]),
43 percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_FH_STALE]),
44 percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_READ]),
45 percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_WRITE]));
46
47 /* thread usage: */
48 seq_printf(seq, "th %u 0", atomic_read(&nfsdstats.th_cnt));
49
50 /* deprecated thread usage histogram stats */
51 for (i = 0; i < 10; i++)
52 seq_puts(seq, " 0.000");
53
54 /* deprecated ra-cache stats */
55 seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n");
56
57 /* show my rpc info */
58 svc_seq_show(seq, &nfsd_svcstats);
59
60#ifdef CONFIG_NFSD_V4
61 /* Show count for individual nfsv4 operations */
62 /* Writing operation numbers 0 1 2 also for maintaining uniformity */
63 seq_printf(seq, "proc4ops %u", LAST_NFS4_OP + 1);
64 for (i = 0; i <= LAST_NFS4_OP; i++) {
65 seq_printf(seq, " %lld",
66 percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_NFS4_OP(i)]));
67 }
68 seq_printf(seq, "\nwdeleg_getattr %lld",
69 percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_WDELEG_GETATTR]));
70
71 seq_putc(seq, '\n');
72#endif
73
74 return 0;
75}
76
77DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
78
79int nfsd_percpu_counters_init(struct percpu_counter *counters, int num)
80{
81 int i, err = 0;
82
83 for (i = 0; !err && i < num; i++)
84 err = percpu_counter_init(&counters[i], 0, GFP_KERNEL);
85
86 if (!err)
87 return 0;
88
89 for (; i > 0; i--)
90 percpu_counter_destroy(&counters[i-1]);
91
92 return err;
93}
94
95void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num)
96{
97 int i;
98
99 for (i = 0; i < num; i++)
100 percpu_counter_set(&counters[i], 0);
101}
102
103void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num)
104{
105 int i;
106
107 for (i = 0; i < num; i++)
108 percpu_counter_destroy(&counters[i]);
109}
110
111static int nfsd_stat_counters_init(void)
112{
113 return nfsd_percpu_counters_init(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
114}
115
116static void nfsd_stat_counters_destroy(void)
117{
118 nfsd_percpu_counters_destroy(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
119}
120
121int nfsd_stat_init(void)
122{
123 int err;
124
125 err = nfsd_stat_counters_init();
126 if (err)
127 return err;
128
129 svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_ops);
130
131 return 0;
132}
133
134void nfsd_stat_shutdown(void)
135{
136 nfsd_stat_counters_destroy();
137 svc_proc_unregister(&init_net, "nfsd");
138}