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 | struct nfsd_stats nfsdstats; |
31 | struct svc_stat nfsd_svcstats = { |
32 | .program = &nfsd_program, |
33 | }; |
34 | |
35 | static int nfsd_show(struct seq_file *seq, void *v) |
36 | { |
37 | int i; |
38 | |
39 | seq_printf(m: seq, fmt: "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n" , |
40 | percpu_counter_sum_positive(fbc: &nfsdstats.counter[NFSD_STATS_RC_HITS]), |
41 | percpu_counter_sum_positive(fbc: &nfsdstats.counter[NFSD_STATS_RC_MISSES]), |
42 | percpu_counter_sum_positive(fbc: &nfsdstats.counter[NFSD_STATS_RC_NOCACHE]), |
43 | percpu_counter_sum_positive(fbc: &nfsdstats.counter[NFSD_STATS_FH_STALE]), |
44 | percpu_counter_sum_positive(fbc: &nfsdstats.counter[NFSD_STATS_IO_READ]), |
45 | percpu_counter_sum_positive(fbc: &nfsdstats.counter[NFSD_STATS_IO_WRITE])); |
46 | |
47 | /* thread usage: */ |
48 | seq_printf(m: seq, fmt: "th %u 0" , atomic_read(v: &nfsdstats.th_cnt)); |
49 | |
50 | /* deprecated thread usage histogram stats */ |
51 | for (i = 0; i < 10; i++) |
52 | seq_puts(m: seq, s: " 0.000" ); |
53 | |
54 | /* deprecated ra-cache stats */ |
55 | seq_puts(m: seq, s: "\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(m: seq, fmt: "proc4ops %u" , LAST_NFS4_OP + 1); |
64 | for (i = 0; i <= LAST_NFS4_OP; i++) { |
65 | seq_printf(m: seq, fmt: " %lld" , |
66 | percpu_counter_sum_positive(fbc: &nfsdstats.counter[NFSD_STATS_NFS4_OP(i)])); |
67 | } |
68 | seq_printf(m: seq, fmt: "\nwdeleg_getattr %lld" , |
69 | percpu_counter_sum_positive(fbc: &nfsdstats.counter[NFSD_STATS_WDELEG_GETATTR])); |
70 | |
71 | seq_putc(m: seq, c: '\n'); |
72 | #endif |
73 | |
74 | return 0; |
75 | } |
76 | |
77 | DEFINE_PROC_SHOW_ATTRIBUTE(nfsd); |
78 | |
79 | int 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(fbc: &counters[i-1]); |
91 | |
92 | return err; |
93 | } |
94 | |
95 | void 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(fbc: &counters[i], amount: 0); |
101 | } |
102 | |
103 | void 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(fbc: &counters[i]); |
109 | } |
110 | |
111 | static int nfsd_stat_counters_init(void) |
112 | { |
113 | return nfsd_percpu_counters_init(counters: nfsdstats.counter, num: NFSD_STATS_COUNTERS_NUM); |
114 | } |
115 | |
116 | static void nfsd_stat_counters_destroy(void) |
117 | { |
118 | nfsd_percpu_counters_destroy(counters: nfsdstats.counter, num: NFSD_STATS_COUNTERS_NUM); |
119 | } |
120 | |
121 | int 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 | |
134 | void nfsd_stat_shutdown(void) |
135 | { |
136 | nfsd_stat_counters_destroy(); |
137 | svc_proc_unregister(&init_net, "nfsd" ); |
138 | } |
139 | |