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
30 static int nfsd_show(struct seq_file *seq, void *v)
31 {
32 struct net *net = pde_data(file_inode(seq->file));
33 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
34 int i;
35
36 seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
37 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_HITS]),
38 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_MISSES]),
39 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_NOCACHE]),
40 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_FH_STALE]),
41 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_READ]),
42 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_WRITE]));
43
44 /* thread usage: */
45 seq_printf(seq, "th %u 0", atomic_read(&nfsd_th_cnt));
46
47 /* deprecated thread usage histogram stats */
48 for (i = 0; i < 10; i++)
49 seq_puts(seq, " 0.000");
50
51 /* deprecated ra-cache stats */
52 seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n");
53
54 /* show my rpc info */
55 svc_seq_show(seq, &nn->nfsd_svcstats);
56
57 #ifdef CONFIG_NFSD_V4
58 /* Show count for individual nfsv4 operations */
59 /* Writing operation numbers 0 1 2 also for maintaining uniformity */
60 seq_printf(seq, "proc4ops %u", LAST_NFS4_OP + 1);
61 for (i = 0; i <= LAST_NFS4_OP; i++) {
62 seq_printf(seq, " %lld",
63 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_NFS4_OP(i)]));
64 }
65 seq_printf(seq, "\nwdeleg_getattr %lld",
66 percpu_counter_sum_positive(&nn->counter[NFSD_STATS_WDELEG_GETATTR]));
67
68 seq_putc(seq, '\n');
69 #endif
70
71 return 0;
72 }
73
74 DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
75
76 void nfsd_proc_stat_init(struct net *net)
77 {
78 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
79
80 svc_proc_register(net, &nn->nfsd_svcstats, &nfsd_proc_ops);
81 }
82
83 void nfsd_proc_stat_shutdown(struct net *net)
84 {
85 svc_proc_unregister(net, "nfsd");
86 }
87
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