2 * linux/net/sunrpc/stats.c
4 * procfs-based user access to generic RPC statistics. The stats files
5 * reside in /proc/net/rpc.
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
12 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
15 #include <linux/module.h>
16 #include <linux/slab.h>
18 #include <linux/init.h>
19 #include <linux/kernel.h>
20 #include <linux/proc_fs.h>
21 #include <linux/seq_file.h>
22 #include <linux/sunrpc/clnt.h>
23 #include <linux/sunrpc/svcsock.h>
24 #include <linux/sunrpc/metrics.h>
25 #include <linux/rcupdate.h>
27 #include <trace/events/sunrpc.h>
31 #define RPCDBG_FACILITY RPCDBG_MISC
34 * Get RPC client stats
36 static int rpc_proc_show(struct seq_file *seq, void *v) {
37 const struct rpc_stat *statp = seq->private;
38 const struct rpc_program *prog = statp->program;
51 statp->rpcauthrefresh);
53 for (i = 0; i < prog->nrvers; i++) {
54 const struct rpc_version *vers = prog->version[i];
57 seq_printf(seq, "proc%u %u",
58 vers->number, vers->nrprocs);
59 for (j = 0; j < vers->nrprocs; j++)
60 seq_printf(seq, " %u", vers->counts[j]);
66 static int rpc_proc_open(struct inode *inode, struct file *file)
68 return single_open(file, rpc_proc_show, PDE_DATA(inode));
71 static const struct file_operations rpc_proc_fops = {
73 .open = rpc_proc_open,
76 .release = single_release,
80 * Get RPC server stats
82 void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp)
84 const struct svc_program *prog = statp->program;
85 const struct svc_version *vers;
95 "rpc %u %u %u %u %u\n",
97 statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
102 for (i = 0; i < prog->pg_nvers; i++) {
103 vers = prog->pg_vers[i];
106 seq_printf(seq, "proc%d %u", i, vers->vs_nproc);
107 for (j = 0; j < vers->vs_nproc; j++)
108 seq_printf(seq, " %u", vers->vs_count[j]);
112 EXPORT_SYMBOL_GPL(svc_seq_show);
115 * rpc_alloc_iostats - allocate an rpc_iostats structure
116 * @clnt: RPC program, version, and xprt
119 struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt)
121 struct rpc_iostats *stats;
124 stats = kcalloc(clnt->cl_maxproc, sizeof(*stats), GFP_KERNEL);
126 for (i = 0; i < clnt->cl_maxproc; i++)
127 spin_lock_init(&stats[i].om_lock);
131 EXPORT_SYMBOL_GPL(rpc_alloc_iostats);
134 * rpc_free_iostats - release an rpc_iostats structure
135 * @stats: doomed rpc_iostats structure
138 void rpc_free_iostats(struct rpc_iostats *stats)
142 EXPORT_SYMBOL_GPL(rpc_free_iostats);
145 * rpc_count_iostats_metrics - tally up per-task stats
146 * @task: completed rpc_task
147 * @op_metrics: stat structure for OP that will accumulate stats from @task
149 void rpc_count_iostats_metrics(const struct rpc_task *task,
150 struct rpc_iostats *op_metrics)
152 struct rpc_rqst *req = task->tk_rqstp;
153 ktime_t backlog, execute, now;
155 if (!op_metrics || !req)
159 spin_lock(&op_metrics->om_lock);
161 op_metrics->om_ops++;
162 /* kernel API: om_ops must never become larger than om_ntrans */
163 op_metrics->om_ntrans += max(req->rq_ntrans, 1);
164 op_metrics->om_timeouts += task->tk_timeouts;
166 op_metrics->om_bytes_sent += req->rq_xmit_bytes_sent;
167 op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd;
170 if (ktime_to_ns(req->rq_xtime)) {
171 backlog = ktime_sub(req->rq_xtime, task->tk_start);
172 op_metrics->om_queue = ktime_add(op_metrics->om_queue, backlog);
175 op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt);
177 execute = ktime_sub(now, task->tk_start);
178 op_metrics->om_execute = ktime_add(op_metrics->om_execute, execute);
180 spin_unlock(&op_metrics->om_lock);
182 trace_rpc_stats_latency(req->rq_task, backlog, req->rq_rtt, execute);
184 EXPORT_SYMBOL_GPL(rpc_count_iostats_metrics);
187 * rpc_count_iostats - tally up per-task stats
188 * @task: completed rpc_task
189 * @stats: array of stat structures
191 * Uses the statidx from @task
193 void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats)
195 rpc_count_iostats_metrics(task,
196 &stats[task->tk_msg.rpc_proc->p_statidx]);
198 EXPORT_SYMBOL_GPL(rpc_count_iostats);
200 static void _print_name(struct seq_file *seq, unsigned int op,
201 const struct rpc_procinfo *procs)
203 if (procs[op].p_name)
204 seq_printf(seq, "\t%12s: ", procs[op].p_name);
206 seq_printf(seq, "\t NULL: ");
208 seq_printf(seq, "\t%12u: ", op);
211 static void _add_rpc_iostats(struct rpc_iostats *a, struct rpc_iostats *b)
213 a->om_ops += b->om_ops;
214 a->om_ntrans += b->om_ntrans;
215 a->om_timeouts += b->om_timeouts;
216 a->om_bytes_sent += b->om_bytes_sent;
217 a->om_bytes_recv += b->om_bytes_recv;
218 a->om_queue = ktime_add(a->om_queue, b->om_queue);
219 a->om_rtt = ktime_add(a->om_rtt, b->om_rtt);
220 a->om_execute = ktime_add(a->om_execute, b->om_execute);
223 static void _print_rpc_iostats(struct seq_file *seq, struct rpc_iostats *stats,
224 int op, const struct rpc_procinfo *procs)
226 _print_name(seq, op, procs);
227 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
231 stats->om_bytes_sent,
232 stats->om_bytes_recv,
233 ktime_to_ms(stats->om_queue),
234 ktime_to_ms(stats->om_rtt),
235 ktime_to_ms(stats->om_execute));
238 void rpc_clnt_show_stats(struct seq_file *seq, struct rpc_clnt *clnt)
240 struct rpc_xprt *xprt;
241 unsigned int op, maxproc = clnt->cl_maxproc;
243 if (!clnt->cl_metrics)
246 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS);
247 seq_printf(seq, "p/v: %u/%u (%s)\n",
248 clnt->cl_prog, clnt->cl_vers, clnt->cl_program->name);
251 xprt = rcu_dereference(clnt->cl_xprt);
253 xprt->ops->print_stats(xprt, seq);
256 seq_printf(seq, "\tper-op statistics\n");
257 for (op = 0; op < maxproc; op++) {
258 struct rpc_iostats stats = {};
259 struct rpc_clnt *next = clnt;
261 _add_rpc_iostats(&stats, &next->cl_metrics[op]);
262 if (next == next->cl_parent)
264 next = next->cl_parent;
266 _print_rpc_iostats(seq, &stats, op, clnt->cl_procinfo);
269 EXPORT_SYMBOL_GPL(rpc_clnt_show_stats);
272 * Register/unregister RPC proc files
274 static inline struct proc_dir_entry *
275 do_register(struct net *net, const char *name, void *data,
276 const struct file_operations *fops)
278 struct sunrpc_net *sn;
280 dprintk("RPC: registering /proc/net/rpc/%s\n", name);
281 sn = net_generic(net, sunrpc_net_id);
282 return proc_create_data(name, 0, sn->proc_net_rpc, fops, data);
285 struct proc_dir_entry *
286 rpc_proc_register(struct net *net, struct rpc_stat *statp)
288 return do_register(net, statp->program->name, statp, &rpc_proc_fops);
290 EXPORT_SYMBOL_GPL(rpc_proc_register);
293 rpc_proc_unregister(struct net *net, const char *name)
295 struct sunrpc_net *sn;
297 sn = net_generic(net, sunrpc_net_id);
298 remove_proc_entry(name, sn->proc_net_rpc);
300 EXPORT_SYMBOL_GPL(rpc_proc_unregister);
302 struct proc_dir_entry *
303 svc_proc_register(struct net *net, struct svc_stat *statp, const struct file_operations *fops)
305 return do_register(net, statp->program->pg_name, statp, fops);
307 EXPORT_SYMBOL_GPL(svc_proc_register);
310 svc_proc_unregister(struct net *net, const char *name)
312 struct sunrpc_net *sn;
314 sn = net_generic(net, sunrpc_net_id);
315 remove_proc_entry(name, sn->proc_net_rpc);
317 EXPORT_SYMBOL_GPL(svc_proc_unregister);
319 int rpc_proc_init(struct net *net)
321 struct sunrpc_net *sn;
323 dprintk("RPC: registering /proc/net/rpc\n");
324 sn = net_generic(net, sunrpc_net_id);
325 sn->proc_net_rpc = proc_mkdir("rpc", net->proc_net);
326 if (sn->proc_net_rpc == NULL)
332 void rpc_proc_exit(struct net *net)
334 dprintk("RPC: unregistering /proc/net/rpc\n");
335 remove_proc_entry("rpc", net->proc_net);