Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * linux/net/sunrpc/stats.c | |
4 | * | |
5 | * procfs-based user access to generic RPC statistics. The stats files | |
6 | * reside in /proc/net/rpc. | |
7 | * | |
8 | * The read routines assume that the buffer passed in is just big enough. | |
9 | * If you implement an RPC service that has its own stats routine which | |
10 | * appends the generic RPC stats, make sure you don't exceed the PAGE_SIZE | |
11 | * limit. | |
12 | * | |
13 | * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de> | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | |
19 | #include <linux/init.h> | |
20 | #include <linux/kernel.h> | |
1da177e4 LT |
21 | #include <linux/proc_fs.h> |
22 | #include <linux/seq_file.h> | |
23 | #include <linux/sunrpc/clnt.h> | |
24 | #include <linux/sunrpc/svcsock.h> | |
11c556b3 | 25 | #include <linux/sunrpc/metrics.h> |
2446ab60 | 26 | #include <linux/rcupdate.h> |
1da177e4 | 27 | |
40bf7eb3 CL |
28 | #include <trace/events/sunrpc.h> |
29 | ||
4f42d0d5 | 30 | #include "netns.h" |
1da177e4 | 31 | |
4f42d0d5 | 32 | #define RPCDBG_FACILITY RPCDBG_MISC |
1da177e4 LT |
33 | |
34 | /* | |
35 | * Get RPC client stats | |
36 | */ | |
37 | static int rpc_proc_show(struct seq_file *seq, void *v) { | |
38 | const struct rpc_stat *statp = seq->private; | |
39 | const struct rpc_program *prog = statp->program; | |
ea339d46 | 40 | unsigned int i, j; |
1da177e4 LT |
41 | |
42 | seq_printf(seq, | |
49e31cba | 43 | "net %u %u %u %u\n", |
1da177e4 LT |
44 | statp->netcnt, |
45 | statp->netudpcnt, | |
46 | statp->nettcpcnt, | |
47 | statp->nettcpconn); | |
48 | seq_printf(seq, | |
49e31cba | 49 | "rpc %u %u %u\n", |
1da177e4 LT |
50 | statp->rpccnt, |
51 | statp->rpcretrans, | |
52 | statp->rpcauthrefresh); | |
53 | ||
54 | for (i = 0; i < prog->nrvers; i++) { | |
55 | const struct rpc_version *vers = prog->version[i]; | |
56 | if (!vers) | |
57 | continue; | |
49e31cba | 58 | seq_printf(seq, "proc%u %u", |
1da177e4 LT |
59 | vers->number, vers->nrprocs); |
60 | for (j = 0; j < vers->nrprocs; j++) | |
1c5876dd | 61 | seq_printf(seq, " %u", vers->counts[j]); |
1da177e4 LT |
62 | seq_putc(seq, '\n'); |
63 | } | |
64 | return 0; | |
65 | } | |
66 | ||
67 | static int rpc_proc_open(struct inode *inode, struct file *file) | |
68 | { | |
359745d7 | 69 | return single_open(file, rpc_proc_show, pde_data(inode)); |
1da177e4 LT |
70 | } |
71 | ||
97a32539 AD |
72 | static const struct proc_ops rpc_proc_ops = { |
73 | .proc_open = rpc_proc_open, | |
74 | .proc_read = seq_read, | |
75 | .proc_lseek = seq_lseek, | |
76 | .proc_release = single_release, | |
1da177e4 LT |
77 | }; |
78 | ||
79 | /* | |
80 | * Get RPC server stats | |
81 | */ | |
7fd38af9 CH |
82 | void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) |
83 | { | |
1da177e4 | 84 | const struct svc_program *prog = statp->program; |
1da177e4 | 85 | const struct svc_version *vers; |
ea339d46 | 86 | unsigned int i, j; |
1da177e4 LT |
87 | |
88 | seq_printf(seq, | |
49e31cba | 89 | "net %u %u %u %u\n", |
1da177e4 LT |
90 | statp->netcnt, |
91 | statp->netudpcnt, | |
92 | statp->nettcpcnt, | |
93 | statp->nettcpconn); | |
94 | seq_printf(seq, | |
49e31cba | 95 | "rpc %u %u %u %u %u\n", |
1da177e4 LT |
96 | statp->rpccnt, |
97 | statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt, | |
98 | statp->rpcbadfmt, | |
99 | statp->rpcbadauth, | |
100 | statp->rpcbadclnt); | |
101 | ||
102 | for (i = 0; i < prog->pg_nvers; i++) { | |
7fd38af9 CH |
103 | vers = prog->pg_vers[i]; |
104 | if (!vers) | |
1da177e4 | 105 | continue; |
49e31cba | 106 | seq_printf(seq, "proc%d %u", i, vers->vs_nproc); |
7fd38af9 CH |
107 | for (j = 0; j < vers->vs_nproc; j++) |
108 | seq_printf(seq, " %u", vers->vs_count[j]); | |
1da177e4 LT |
109 | seq_putc(seq, '\n'); |
110 | } | |
111 | } | |
24c3767e | 112 | EXPORT_SYMBOL_GPL(svc_seq_show); |
1da177e4 | 113 | |
11c556b3 CL |
114 | /** |
115 | * rpc_alloc_iostats - allocate an rpc_iostats structure | |
116 | * @clnt: RPC program, version, and xprt | |
117 | * | |
118 | */ | |
119 | struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) | |
120 | { | |
edef1297 CL |
121 | struct rpc_iostats *stats; |
122 | int i; | |
123 | ||
124 | stats = kcalloc(clnt->cl_maxproc, sizeof(*stats), GFP_KERNEL); | |
125 | if (stats) { | |
126 | for (i = 0; i < clnt->cl_maxproc; i++) | |
127 | spin_lock_init(&stats[i].om_lock); | |
128 | } | |
129 | return stats; | |
11c556b3 | 130 | } |
e8914c65 | 131 | EXPORT_SYMBOL_GPL(rpc_alloc_iostats); |
11c556b3 CL |
132 | |
133 | /** | |
134 | * rpc_free_iostats - release an rpc_iostats structure | |
135 | * @stats: doomed rpc_iostats structure | |
136 | * | |
137 | */ | |
138 | void rpc_free_iostats(struct rpc_iostats *stats) | |
139 | { | |
140 | kfree(stats); | |
141 | } | |
e8914c65 | 142 | EXPORT_SYMBOL_GPL(rpc_free_iostats); |
11c556b3 CL |
143 | |
144 | /** | |
840210fc | 145 | * rpc_count_iostats_metrics - tally up per-task stats |
11c556b3 | 146 | * @task: completed rpc_task |
840210fc | 147 | * @op_metrics: stat structure for OP that will accumulate stats from @task |
11c556b3 | 148 | */ |
840210fc WAA |
149 | void rpc_count_iostats_metrics(const struct rpc_task *task, |
150 | struct rpc_iostats *op_metrics) | |
11c556b3 CL |
151 | { |
152 | struct rpc_rqst *req = task->tk_rqstp; | |
40bf7eb3 | 153 | ktime_t backlog, execute, now; |
11c556b3 | 154 | |
840210fc | 155 | if (!op_metrics || !req) |
11c556b3 | 156 | return; |
55ae1aab | 157 | |
edef1297 | 158 | now = ktime_get(); |
edef1297 CL |
159 | spin_lock(&op_metrics->om_lock); |
160 | ||
11c556b3 | 161 | op_metrics->om_ops++; |
ae09531d CL |
162 | /* kernel API: om_ops must never become larger than om_ntrans */ |
163 | op_metrics->om_ntrans += max(req->rq_ntrans, 1); | |
11c556b3 CL |
164 | op_metrics->om_timeouts += task->tk_timeouts; |
165 | ||
d60dbb20 | 166 | op_metrics->om_bytes_sent += req->rq_xmit_bytes_sent; |
dd2b63d0 | 167 | op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd; |
11c556b3 | 168 | |
40bf7eb3 | 169 | backlog = 0; |
ae09531d | 170 | if (ktime_to_ns(req->rq_xtime)) { |
40bf7eb3 CL |
171 | backlog = ktime_sub(req->rq_xtime, task->tk_start); |
172 | op_metrics->om_queue = ktime_add(op_metrics->om_queue, backlog); | |
ae09531d | 173 | } |
40bf7eb3 | 174 | |
d60dbb20 | 175 | op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt); |
11c556b3 | 176 | |
40bf7eb3 CL |
177 | execute = ktime_sub(now, task->tk_start); |
178 | op_metrics->om_execute = ktime_add(op_metrics->om_execute, execute); | |
a332518f DW |
179 | if (task->tk_status < 0) |
180 | op_metrics->om_error_status++; | |
edef1297 CL |
181 | |
182 | spin_unlock(&op_metrics->om_lock); | |
40bf7eb3 CL |
183 | |
184 | trace_rpc_stats_latency(req->rq_task, backlog, req->rq_rtt, execute); | |
11c556b3 | 185 | } |
840210fc WAA |
186 | EXPORT_SYMBOL_GPL(rpc_count_iostats_metrics); |
187 | ||
188 | /** | |
189 | * rpc_count_iostats - tally up per-task stats | |
190 | * @task: completed rpc_task | |
191 | * @stats: array of stat structures | |
192 | * | |
193 | * Uses the statidx from @task | |
194 | */ | |
195 | void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats) | |
196 | { | |
197 | rpc_count_iostats_metrics(task, | |
198 | &stats[task->tk_msg.rpc_proc->p_statidx]); | |
199 | } | |
0a702195 | 200 | EXPORT_SYMBOL_GPL(rpc_count_iostats); |
11c556b3 | 201 | |
ec535ce1 | 202 | static void _print_name(struct seq_file *seq, unsigned int op, |
499b4988 | 203 | const struct rpc_procinfo *procs) |
cc0175c1 CL |
204 | { |
205 | if (procs[op].p_name) | |
206 | seq_printf(seq, "\t%12s: ", procs[op].p_name); | |
207 | else if (op == 0) | |
208 | seq_printf(seq, "\t NULL: "); | |
209 | else | |
210 | seq_printf(seq, "\t%12u: ", op); | |
211 | } | |
212 | ||
189e1955 DW |
213 | static void _add_rpc_iostats(struct rpc_iostats *a, struct rpc_iostats *b) |
214 | { | |
215 | a->om_ops += b->om_ops; | |
216 | a->om_ntrans += b->om_ntrans; | |
217 | a->om_timeouts += b->om_timeouts; | |
218 | a->om_bytes_sent += b->om_bytes_sent; | |
219 | a->om_bytes_recv += b->om_bytes_recv; | |
220 | a->om_queue = ktime_add(a->om_queue, b->om_queue); | |
221 | a->om_rtt = ktime_add(a->om_rtt, b->om_rtt); | |
222 | a->om_execute = ktime_add(a->om_execute, b->om_execute); | |
a332518f | 223 | a->om_error_status += b->om_error_status; |
189e1955 DW |
224 | } |
225 | ||
acdce5fb DW |
226 | static void _print_rpc_iostats(struct seq_file *seq, struct rpc_iostats *stats, |
227 | int op, const struct rpc_procinfo *procs) | |
228 | { | |
229 | _print_name(seq, op, procs); | |
a332518f | 230 | seq_printf(seq, "%lu %lu %lu %llu %llu %llu %llu %llu %lu\n", |
acdce5fb DW |
231 | stats->om_ops, |
232 | stats->om_ntrans, | |
233 | stats->om_timeouts, | |
234 | stats->om_bytes_sent, | |
235 | stats->om_bytes_recv, | |
236 | ktime_to_ms(stats->om_queue), | |
237 | ktime_to_ms(stats->om_rtt), | |
a332518f DW |
238 | ktime_to_ms(stats->om_execute), |
239 | stats->om_error_status); | |
acdce5fb DW |
240 | } |
241 | ||
10db5691 N |
242 | static int do_print_stats(struct rpc_clnt *clnt, struct rpc_xprt *xprt, void *seqv) |
243 | { | |
244 | struct seq_file *seq = seqv; | |
245 | ||
246 | xprt->ops->print_stats(xprt, seq); | |
247 | return 0; | |
248 | } | |
249 | ||
016583d7 | 250 | void rpc_clnt_show_stats(struct seq_file *seq, struct rpc_clnt *clnt) |
11c556b3 | 251 | { |
11c556b3 CL |
252 | unsigned int op, maxproc = clnt->cl_maxproc; |
253 | ||
016583d7 | 254 | if (!clnt->cl_metrics) |
11c556b3 CL |
255 | return; |
256 | ||
257 | seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); | |
258 | seq_printf(seq, "p/v: %u/%u (%s)\n", | |
55909f21 | 259 | clnt->cl_prog, clnt->cl_vers, clnt->cl_program->name); |
11c556b3 | 260 | |
10db5691 | 261 | rpc_clnt_iterate_for_each_xprt(clnt, do_print_stats, seq); |
11c556b3 CL |
262 | |
263 | seq_printf(seq, "\tper-op statistics\n"); | |
264 | for (op = 0; op < maxproc; op++) { | |
016583d7 DW |
265 | struct rpc_iostats stats = {}; |
266 | struct rpc_clnt *next = clnt; | |
267 | do { | |
268 | _add_rpc_iostats(&stats, &next->cl_metrics[op]); | |
269 | if (next == next->cl_parent) | |
270 | break; | |
271 | next = next->cl_parent; | |
272 | } while (next); | |
273 | _print_rpc_iostats(seq, &stats, op, clnt->cl_procinfo); | |
11c556b3 CL |
274 | } |
275 | } | |
016583d7 | 276 | EXPORT_SYMBOL_GPL(rpc_clnt_show_stats); |
11c556b3 | 277 | |
1da177e4 LT |
278 | /* |
279 | * Register/unregister RPC proc files | |
280 | */ | |
281 | static inline struct proc_dir_entry * | |
ec7652aa | 282 | do_register(struct net *net, const char *name, void *data, |
97a32539 | 283 | const struct proc_ops *proc_ops) |
1da177e4 | 284 | { |
4f42d0d5 | 285 | struct sunrpc_net *sn; |
1da177e4 | 286 | |
4f42d0d5 | 287 | dprintk("RPC: registering /proc/net/rpc/%s\n", name); |
ec7652aa | 288 | sn = net_generic(net, sunrpc_net_id); |
97a32539 | 289 | return proc_create_data(name, 0, sn->proc_net_rpc, proc_ops, data); |
1da177e4 LT |
290 | } |
291 | ||
292 | struct proc_dir_entry * | |
ec7652aa | 293 | rpc_proc_register(struct net *net, struct rpc_stat *statp) |
1da177e4 | 294 | { |
97a32539 | 295 | return do_register(net, statp->program->name, statp, &rpc_proc_ops); |
1da177e4 | 296 | } |
e8914c65 | 297 | EXPORT_SYMBOL_GPL(rpc_proc_register); |
1da177e4 LT |
298 | |
299 | void | |
ec7652aa | 300 | rpc_proc_unregister(struct net *net, const char *name) |
1da177e4 | 301 | { |
4f42d0d5 PE |
302 | struct sunrpc_net *sn; |
303 | ||
ec7652aa | 304 | sn = net_generic(net, sunrpc_net_id); |
4f42d0d5 | 305 | remove_proc_entry(name, sn->proc_net_rpc); |
1da177e4 | 306 | } |
e8914c65 | 307 | EXPORT_SYMBOL_GPL(rpc_proc_unregister); |
1da177e4 LT |
308 | |
309 | struct proc_dir_entry * | |
97a32539 | 310 | svc_proc_register(struct net *net, struct svc_stat *statp, const struct proc_ops *proc_ops) |
1da177e4 | 311 | { |
97a32539 | 312 | return do_register(net, statp->program->pg_name, statp, proc_ops); |
1da177e4 | 313 | } |
24c3767e | 314 | EXPORT_SYMBOL_GPL(svc_proc_register); |
1da177e4 LT |
315 | |
316 | void | |
246590f5 | 317 | svc_proc_unregister(struct net *net, const char *name) |
1da177e4 | 318 | { |
4f42d0d5 PE |
319 | struct sunrpc_net *sn; |
320 | ||
246590f5 | 321 | sn = net_generic(net, sunrpc_net_id); |
4f42d0d5 | 322 | remove_proc_entry(name, sn->proc_net_rpc); |
1da177e4 | 323 | } |
24c3767e | 324 | EXPORT_SYMBOL_GPL(svc_proc_unregister); |
1da177e4 | 325 | |
4f42d0d5 | 326 | int rpc_proc_init(struct net *net) |
1da177e4 | 327 | { |
4f42d0d5 PE |
328 | struct sunrpc_net *sn; |
329 | ||
46121cf7 | 330 | dprintk("RPC: registering /proc/net/rpc\n"); |
4f42d0d5 PE |
331 | sn = net_generic(net, sunrpc_net_id); |
332 | sn->proc_net_rpc = proc_mkdir("rpc", net->proc_net); | |
333 | if (sn->proc_net_rpc == NULL) | |
334 | return -ENOMEM; | |
335 | ||
336 | return 0; | |
1da177e4 LT |
337 | } |
338 | ||
4f42d0d5 | 339 | void rpc_proc_exit(struct net *net) |
1da177e4 | 340 | { |
46121cf7 | 341 | dprintk("RPC: unregistering /proc/net/rpc\n"); |
4f42d0d5 | 342 | remove_proc_entry("rpc", net->proc_net); |
1da177e4 | 343 | } |