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(inode: file_inode(f: seq->file)); |
33 | struct nfsd_net *nn = net_generic(net, id: nfsd_net_id); |
34 | int i; |
35 | |
36 | seq_printf(m: seq, fmt: "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n" , |
37 | percpu_counter_sum_positive(fbc: &nn->counter[NFSD_STATS_RC_HITS]), |
38 | percpu_counter_sum_positive(fbc: &nn->counter[NFSD_STATS_RC_MISSES]), |
39 | percpu_counter_sum_positive(fbc: &nn->counter[NFSD_STATS_RC_NOCACHE]), |
40 | percpu_counter_sum_positive(fbc: &nn->counter[NFSD_STATS_FH_STALE]), |
41 | percpu_counter_sum_positive(fbc: &nn->counter[NFSD_STATS_IO_READ]), |
42 | percpu_counter_sum_positive(fbc: &nn->counter[NFSD_STATS_IO_WRITE])); |
43 | |
44 | /* thread usage: */ |
45 | seq_printf(m: seq, fmt: "th %u 0" , atomic_read(v: &nfsd_th_cnt)); |
46 | |
47 | /* deprecated thread usage histogram stats */ |
48 | for (i = 0; i < 10; i++) |
49 | seq_puts(m: seq, s: " 0.000" ); |
50 | |
51 | /* deprecated ra-cache stats */ |
52 | seq_puts(m: seq, s: "\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(m: seq, fmt: "proc4ops %u" , LAST_NFS4_OP + 1); |
61 | for (i = 0; i <= LAST_NFS4_OP; i++) { |
62 | seq_printf(m: seq, fmt: " %lld" , |
63 | percpu_counter_sum_positive(fbc: &nn->counter[NFSD_STATS_NFS4_OP(i)])); |
64 | } |
65 | seq_printf(m: seq, fmt: "\nwdeleg_getattr %lld" , |
66 | percpu_counter_sum_positive(fbc: &nn->counter[NFSD_STATS_WDELEG_GETATTR])); |
67 | |
68 | seq_putc(m: seq, c: '\n'); |
69 | #endif |
70 | |
71 | return 0; |
72 | } |
73 | |
74 | DEFINE_PROC_SHOW_ATTRIBUTE(nfsd); |
75 | |
76 | int nfsd_percpu_counters_init(struct percpu_counter *counters, int num) |
77 | { |
78 | int i, err = 0; |
79 | |
80 | for (i = 0; !err && i < num; i++) |
81 | err = percpu_counter_init(&counters[i], 0, GFP_KERNEL); |
82 | |
83 | if (!err) |
84 | return 0; |
85 | |
86 | for (; i > 0; i--) |
87 | percpu_counter_destroy(fbc: &counters[i-1]); |
88 | |
89 | return err; |
90 | } |
91 | |
92 | void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num) |
93 | { |
94 | int i; |
95 | |
96 | for (i = 0; i < num; i++) |
97 | percpu_counter_set(fbc: &counters[i], amount: 0); |
98 | } |
99 | |
100 | void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num) |
101 | { |
102 | int i; |
103 | |
104 | for (i = 0; i < num; i++) |
105 | percpu_counter_destroy(fbc: &counters[i]); |
106 | } |
107 | |
108 | int nfsd_stat_counters_init(struct nfsd_net *nn) |
109 | { |
110 | return nfsd_percpu_counters_init(counters: nn->counter, num: NFSD_STATS_COUNTERS_NUM); |
111 | } |
112 | |
113 | void nfsd_stat_counters_destroy(struct nfsd_net *nn) |
114 | { |
115 | nfsd_percpu_counters_destroy(counters: nn->counter, num: NFSD_STATS_COUNTERS_NUM); |
116 | } |
117 | |
118 | void nfsd_proc_stat_init(struct net *net) |
119 | { |
120 | struct nfsd_net *nn = net_generic(net, id: nfsd_net_id); |
121 | |
122 | svc_proc_register(net, &nn->nfsd_svcstats, &nfsd_proc_ops); |
123 | } |
124 | |
125 | void nfsd_proc_stat_shutdown(struct net *net) |
126 | { |
127 | svc_proc_unregister(net, "nfsd" ); |
128 | } |
129 | |