1 /*
2 * linux/net/sunrpc/stats.c
3 *
4 * procfs-based user access to generic RPC statistics. The stats files
5 * reside in /proc/net/rpc.
6 *
7 * The read routines assume that the buffer passed in is just big enough.
8 * If you implement an RPC service that has its own stats routine which
9 * appends the generic RPC stats, make sure you don't exceed the PAGE_SIZE
10 * limit.
11 *
12 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
13 */
14
15 #include <linux/module.h>
16
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/proc_fs.h>
20 #include <linux/seq_file.h>
21 #include <linux/sunrpc/clnt.h>
22 #include <linux/sunrpc/svcsock.h>
23 #include <linux/sunrpc/metrics.h>
24 #include <net/net_namespace.h>
25
26 #define RPCDBG_FACILITY RPCDBG_MISC
27
28 struct proc_dir_entry *proc_net_rpc = NULL;
29
30 /*
31 * Get RPC client stats
32 */
33 static int rpc_proc_show(struct seq_file *seq, void *v) {
34 const struct rpc_stat *statp = seq->private;
35 const struct rpc_program *prog = statp->program;
36 unsigned int i, j;
37
38 seq_printf(seq,
39 "net %u %u %u %u\n",
40 statp->netcnt,
41 statp->netudpcnt,
42 statp->nettcpcnt,
43 statp->nettcpconn);
44 seq_printf(seq,
45 "rpc %u %u %u\n",
46 statp->rpccnt,
47 statp->rpcretrans,
48 statp->rpcauthrefresh);
49
50 for (i = 0; i < prog->nrvers; i++) {
51 const struct rpc_version *vers = prog->version[i];
52 if (!vers)
53 continue;
54 seq_printf(seq, "proc%u %u",
55 vers->number, vers->nrprocs);
56 for (j = 0; j < vers->nrprocs; j++)
57 seq_printf(seq, " %u",
58 vers->procs[j].p_count);
59 seq_putc(seq, '\n');
60 }
61 return 0;
62 }
63
64 static int rpc_proc_open(struct inode *inode, struct file *file)
65 {
66 return single_open(file, rpc_proc_show, PDE(inode)->data);
67 }
68
69 static const struct file_operations rpc_proc_fops = {
70 .owner = THIS_MODULE,
71 .open = rpc_proc_open,
72 .read = seq_read,
73 .llseek = seq_lseek,
74 .release = single_release,
75 };
76
77 /*
78 * Get RPC server stats
79 */
80 void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) {
81 const struct svc_program *prog = statp->program;
82 const struct svc_procedure *proc;
83 const struct svc_version *vers;
84 unsigned int i, j;
85
86 seq_printf(seq,
87 "net %u %u %u %u\n",
88 statp->netcnt,
89 statp->netudpcnt,
90 statp->nettcpcnt,
91 statp->nettcpconn);
92 seq_printf(seq,
93 "rpc %u %u %u %u %u\n",
94 statp->rpccnt,
95 statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
96 statp->rpcbadfmt,
97 statp->rpcbadauth,
98 statp->rpcbadclnt);
99
100 for (i = 0; i < prog->pg_nvers; i++) {
101 if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc))
102 continue;
103 seq_printf(seq, "proc%d %u", i, vers->vs_nproc);
104 for (j = 0; j < vers->vs_nproc; j++, proc++)
105 seq_printf(seq, " %u", proc->pc_count);
106 seq_putc(seq, '\n');
107 }
108 }
109 EXPORT_SYMBOL(svc_seq_show);
110
111 /**
112 * rpc_alloc_iostats - allocate an rpc_iostats structure
113 * @clnt: RPC program, version, and xprt
114 *
115 */
116 struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt)
117 {
118 struct rpc_iostats *new;
119 new = kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL);
120 return new;
121 }
122 EXPORT_SYMBOL_GPL(rpc_alloc_iostats);
123
124 /**
125 * rpc_free_iostats - release an rpc_iostats structure
126 * @stats: doomed rpc_iostats structure
127 *
128 */
129 void rpc_free_iostats(struct rpc_iostats *stats)
130 {
131 kfree(stats);
132 }
133 EXPORT_SYMBOL_GPL(rpc_free_iostats);
134
135 /**
136 * rpc_count_iostats - tally up per-task stats
137 * @task: completed rpc_task
138 *
139 * Relies on the caller for serialization.
140 */
141 void rpc_count_iostats(struct rpc_task *task)
142 {
143 struct rpc_rqst *req = task->tk_rqstp;
144 struct rpc_iostats *stats = task->tk_client->cl_metrics;
145 struct rpc_iostats *op_metrics;
146 long rtt, execute, queue;
147
148 if (!stats || !req)
149 return;
150 op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx];
151
152 op_metrics->om_ops++;
153 op_metrics->om_ntrans += req->rq_ntrans;
154 op_metrics->om_timeouts += task->tk_timeouts;
155
156 op_metrics->om_bytes_sent += task->tk_bytes_sent;
157 op_metrics->om_bytes_recv += req->rq_received;
158
159 queue = (long)req->rq_xtime - task->tk_start;
160 if (queue < 0)
161 queue = -queue;
162 op_metrics->om_queue += queue;
163
164 rtt = task->tk_rtt;
165 if (rtt < 0)
166 rtt = -rtt;
167 op_metrics->om_rtt += rtt;
168
169 execute = (long)jiffies - task->tk_start;
170 if (execute < 0)
171 execute = -execute;
172 op_metrics->om_execute += execute;
173 }
174
175 static void _print_name(struct seq_file *seq, unsigned int op,
176 struct rpc_procinfo *procs)
177 {
178 if (procs[op].p_name)
179 seq_printf(seq, "\t%12s: ", procs[op].p_name);
180 else if (op == 0)
181 seq_printf(seq, "\t NULL: ");
182 else
183 seq_printf(seq, "\t%12u: ", op);
184 }
185
186 #define MILLISECS_PER_JIFFY (1000 / HZ)
187
188 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
189 {
190 struct rpc_iostats *stats = clnt->cl_metrics;
191 struct rpc_xprt *xprt = clnt->cl_xprt;
192 unsigned int op, maxproc = clnt->cl_maxproc;
193
194 if (!stats)
195 return;
196
197 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS);
198 seq_printf(seq, "p/v: %u/%u (%s)\n",
199 clnt->cl_prog, clnt->cl_vers, clnt->cl_protname);
200
201 if (xprt)
202 xprt->ops->print_stats(xprt, seq);
203
204 seq_printf(seq, "\tper-op statistics\n");
205 for (op = 0; op < maxproc; op++) {
206 struct rpc_iostats *metrics = &stats[op];
207 _print_name(seq, op, clnt->cl_procinfo);
208 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
209 metrics->om_ops,
210 metrics->om_ntrans,
211 metrics->om_timeouts,
212 metrics->om_bytes_sent,
213 metrics->om_bytes_recv,
214 metrics->om_queue * MILLISECS_PER_JIFFY,
215 metrics->om_rtt * MILLISECS_PER_JIFFY,
216 metrics->om_execute * MILLISECS_PER_JIFFY);
217 }
218 }
219 EXPORT_SYMBOL_GPL(rpc_print_iostats);
220
221 /*
222 * Register/unregister RPC proc files
223 */
224 static inline struct proc_dir_entry *
225 do_register(const char *name, void *data, const struct file_operations *fops)
226 {
227 struct proc_dir_entry *ent;
228
229 rpc_proc_init();
230 dprintk("RPC: registering /proc/net/rpc/%s\n", name);
231
232 ent = proc_create(name, 0, proc_net_rpc, fops);
233 if (ent) {
234 ent->data = data;
235 }
236 return ent;
237 }
238
239 struct proc_dir_entry *
240 rpc_proc_register(struct rpc_stat *statp)
241 {
242 return do_register(statp->program->name, statp, &rpc_proc_fops);
243 }
244 EXPORT_SYMBOL_GPL(rpc_proc_register);
245
246 void
247 rpc_proc_unregister(const char *name)
248 {
249 remove_proc_entry(name, proc_net_rpc);
250 }
251 EXPORT_SYMBOL_GPL(rpc_proc_unregister);
252
253 struct proc_dir_entry *
254 svc_proc_register(struct svc_stat *statp, const struct file_operations *fops)
255 {
256 return do_register(statp->program->pg_name, statp, fops);
257 }
258 EXPORT_SYMBOL(svc_proc_register);
259
260 void
261 svc_proc_unregister(const char *name)
262 {
263 remove_proc_entry(name, proc_net_rpc);
264 }
265 EXPORT_SYMBOL(svc_proc_unregister);
266
267 void
268 rpc_proc_init(void)
269 {
270 dprintk("RPC: registering /proc/net/rpc\n");
271 if (!proc_net_rpc) {
272 struct proc_dir_entry *ent;
273 ent = proc_mkdir("rpc", init_net.proc_net);
274 if (ent) {
275 ent->owner = THIS_MODULE;
276 proc_net_rpc = ent;
277 }
278 }
279 }
280
281 void
282 rpc_proc_exit(void)
283 {
284 dprintk("RPC: unregistering /proc/net/rpc\n");
285 if (proc_net_rpc) {
286 proc_net_rpc = NULL;
287 remove_proc_entry("rpc", init_net.proc_net);
288 }
289 }
290
291
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