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 <net/net_namespace.h>
27 #define RPCDBG_FACILITY RPCDBG_MISC
29 struct proc_dir_entry *proc_net_rpc = NULL;
32 * Get RPC client stats
34 static int rpc_proc_show(struct seq_file *seq, void *v) {
35 const struct rpc_stat *statp = seq->private;
36 const struct rpc_program *prog = statp->program;
49 statp->rpcauthrefresh);
51 for (i = 0; i < prog->nrvers; i++) {
52 const struct rpc_version *vers = prog->version[i];
55 seq_printf(seq, "proc%u %u",
56 vers->number, vers->nrprocs);
57 for (j = 0; j < vers->nrprocs; j++)
58 seq_printf(seq, " %u",
59 vers->procs[j].p_count);
65 static int rpc_proc_open(struct inode *inode, struct file *file)
67 return single_open(file, rpc_proc_show, PDE(inode)->data);
70 static const struct file_operations rpc_proc_fops = {
72 .open = rpc_proc_open,
75 .release = single_release,
79 * Get RPC server stats
81 void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) {
82 const struct svc_program *prog = statp->program;
83 const struct svc_procedure *proc;
84 const struct svc_version *vers;
94 "rpc %u %u %u %u %u\n",
96 statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
101 for (i = 0; i < prog->pg_nvers; i++) {
102 if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc))
104 seq_printf(seq, "proc%d %u", i, vers->vs_nproc);
105 for (j = 0; j < vers->vs_nproc; j++, proc++)
106 seq_printf(seq, " %u", proc->pc_count);
110 EXPORT_SYMBOL_GPL(svc_seq_show);
113 * rpc_alloc_iostats - allocate an rpc_iostats structure
114 * @clnt: RPC program, version, and xprt
117 struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt)
119 struct rpc_iostats *new;
120 new = kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL);
123 EXPORT_SYMBOL_GPL(rpc_alloc_iostats);
126 * rpc_free_iostats - release an rpc_iostats structure
127 * @stats: doomed rpc_iostats structure
130 void rpc_free_iostats(struct rpc_iostats *stats)
134 EXPORT_SYMBOL_GPL(rpc_free_iostats);
137 * rpc_count_iostats - tally up per-task stats
138 * @task: completed rpc_task
140 * Relies on the caller for serialization.
142 void rpc_count_iostats(struct rpc_task *task)
144 struct rpc_rqst *req = task->tk_rqstp;
145 struct rpc_iostats *stats;
146 struct rpc_iostats *op_metrics;
149 if (!task->tk_client || !task->tk_client->cl_metrics || !req)
152 stats = task->tk_client->cl_metrics;
153 op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx];
155 op_metrics->om_ops++;
156 op_metrics->om_ntrans += req->rq_ntrans;
157 op_metrics->om_timeouts += task->tk_timeouts;
159 op_metrics->om_bytes_sent += req->rq_xmit_bytes_sent;
160 op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd;
162 delta = ktime_sub(req->rq_xtime, task->tk_start);
163 op_metrics->om_queue = ktime_add(op_metrics->om_queue, delta);
165 op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt);
167 delta = ktime_sub(ktime_get(), task->tk_start);
168 op_metrics->om_execute = ktime_add(op_metrics->om_execute, delta);
171 static void _print_name(struct seq_file *seq, unsigned int op,
172 struct rpc_procinfo *procs)
174 if (procs[op].p_name)
175 seq_printf(seq, "\t%12s: ", procs[op].p_name);
177 seq_printf(seq, "\t NULL: ");
179 seq_printf(seq, "\t%12u: ", op);
182 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
184 struct rpc_iostats *stats = clnt->cl_metrics;
185 struct rpc_xprt *xprt = clnt->cl_xprt;
186 unsigned int op, maxproc = clnt->cl_maxproc;
191 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS);
192 seq_printf(seq, "p/v: %u/%u (%s)\n",
193 clnt->cl_prog, clnt->cl_vers, clnt->cl_protname);
196 xprt->ops->print_stats(xprt, seq);
198 seq_printf(seq, "\tper-op statistics\n");
199 for (op = 0; op < maxproc; op++) {
200 struct rpc_iostats *metrics = &stats[op];
201 _print_name(seq, op, clnt->cl_procinfo);
202 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
205 metrics->om_timeouts,
206 metrics->om_bytes_sent,
207 metrics->om_bytes_recv,
208 ktime_to_ms(metrics->om_queue),
209 ktime_to_ms(metrics->om_rtt),
210 ktime_to_ms(metrics->om_execute));
213 EXPORT_SYMBOL_GPL(rpc_print_iostats);
216 * Register/unregister RPC proc files
218 static inline struct proc_dir_entry *
219 do_register(const char *name, void *data, const struct file_operations *fops)
222 dprintk("RPC: registering /proc/net/rpc/%s\n", name);
224 return proc_create_data(name, 0, proc_net_rpc, fops, data);
227 struct proc_dir_entry *
228 rpc_proc_register(struct rpc_stat *statp)
230 return do_register(statp->program->name, statp, &rpc_proc_fops);
232 EXPORT_SYMBOL_GPL(rpc_proc_register);
235 rpc_proc_unregister(const char *name)
237 remove_proc_entry(name, proc_net_rpc);
239 EXPORT_SYMBOL_GPL(rpc_proc_unregister);
241 struct proc_dir_entry *
242 svc_proc_register(struct svc_stat *statp, const struct file_operations *fops)
244 return do_register(statp->program->pg_name, statp, fops);
246 EXPORT_SYMBOL_GPL(svc_proc_register);
249 svc_proc_unregister(const char *name)
251 remove_proc_entry(name, proc_net_rpc);
253 EXPORT_SYMBOL_GPL(svc_proc_unregister);
258 dprintk("RPC: registering /proc/net/rpc\n");
260 proc_net_rpc = proc_mkdir("rpc", init_net.proc_net);
266 dprintk("RPC: unregistering /proc/net/rpc\n");
269 remove_proc_entry("rpc", init_net.proc_net);