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>
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/sched.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>
26 #define RPCDBG_FACILITY RPCDBG_MISC
28 struct proc_dir_entry *proc_net_rpc = NULL;
31 * Get RPC client stats
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;
48 statp->rpcauthrefresh);
50 for (i = 0; i < prog->nrvers; i++) {
51 const struct rpc_version *vers = prog->version[i];
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);
64 static int rpc_proc_open(struct inode *inode, struct file *file)
66 return single_open(file, rpc_proc_show, PDE(inode)->data);
69 static const struct file_operations rpc_proc_fops = {
71 .open = rpc_proc_open,
74 .release = single_release,
78 * Get RPC server stats
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;
93 "rpc %u %u %u %u %u\n",
95 statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
100 for (i = 0; i < prog->pg_nvers; i++) {
101 if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc))
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);
111 * rpc_alloc_iostats - allocate an rpc_iostats structure
112 * @clnt: RPC program, version, and xprt
115 struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt)
117 struct rpc_iostats *new;
118 new = kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL);
121 EXPORT_SYMBOL(rpc_alloc_iostats);
124 * rpc_free_iostats - release an rpc_iostats structure
125 * @stats: doomed rpc_iostats structure
128 void rpc_free_iostats(struct rpc_iostats *stats)
132 EXPORT_SYMBOL(rpc_free_iostats);
135 * rpc_count_iostats - tally up per-task stats
136 * @task: completed rpc_task
138 * Relies on the caller for serialization.
140 void rpc_count_iostats(struct rpc_task *task)
142 struct rpc_rqst *req = task->tk_rqstp;
143 struct rpc_iostats *stats = task->tk_client->cl_metrics;
144 struct rpc_iostats *op_metrics;
145 long rtt, execute, queue;
149 op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx];
151 op_metrics->om_ops++;
152 op_metrics->om_ntrans += req->rq_ntrans;
153 op_metrics->om_timeouts += task->tk_timeouts;
155 op_metrics->om_bytes_sent += task->tk_bytes_sent;
156 op_metrics->om_bytes_recv += req->rq_received;
158 queue = (long)req->rq_xtime - task->tk_start;
161 op_metrics->om_queue += queue;
166 op_metrics->om_rtt += rtt;
168 execute = (long)jiffies - task->tk_start;
171 op_metrics->om_execute += execute;
174 static void _print_name(struct seq_file *seq, unsigned int op,
175 struct rpc_procinfo *procs)
177 if (procs[op].p_name)
178 seq_printf(seq, "\t%12s: ", procs[op].p_name);
180 seq_printf(seq, "\t NULL: ");
182 seq_printf(seq, "\t%12u: ", op);
185 #define MILLISECS_PER_JIFFY (1000 / HZ)
187 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
189 struct rpc_iostats *stats = clnt->cl_metrics;
190 struct rpc_xprt *xprt = clnt->cl_xprt;
191 unsigned int op, maxproc = clnt->cl_maxproc;
196 seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS);
197 seq_printf(seq, "p/v: %u/%u (%s)\n",
198 clnt->cl_prog, clnt->cl_vers, clnt->cl_protname);
201 xprt->ops->print_stats(xprt, seq);
203 seq_printf(seq, "\tper-op statistics\n");
204 for (op = 0; op < maxproc; op++) {
205 struct rpc_iostats *metrics = &stats[op];
206 _print_name(seq, op, clnt->cl_procinfo);
207 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
210 metrics->om_timeouts,
211 metrics->om_bytes_sent,
212 metrics->om_bytes_recv,
213 metrics->om_queue * MILLISECS_PER_JIFFY,
214 metrics->om_rtt * MILLISECS_PER_JIFFY,
215 metrics->om_execute * MILLISECS_PER_JIFFY);
218 EXPORT_SYMBOL(rpc_print_iostats);
221 * Register/unregister RPC proc files
223 static inline struct proc_dir_entry *
224 do_register(const char *name, void *data, const struct file_operations *fops)
226 struct proc_dir_entry *ent;
229 dprintk("RPC: registering /proc/net/rpc/%s\n", name);
231 ent = create_proc_entry(name, 0, proc_net_rpc);
233 ent->proc_fops = fops;
239 struct proc_dir_entry *
240 rpc_proc_register(struct rpc_stat *statp)
242 return do_register(statp->program->name, statp, &rpc_proc_fops);
246 rpc_proc_unregister(const char *name)
248 remove_proc_entry(name, proc_net_rpc);
251 struct proc_dir_entry *
252 svc_proc_register(struct svc_stat *statp, const struct file_operations *fops)
254 return do_register(statp->program->pg_name, statp, fops);
258 svc_proc_unregister(const char *name)
260 remove_proc_entry(name, proc_net_rpc);
266 dprintk("RPC: registering /proc/net/rpc\n");
268 struct proc_dir_entry *ent;
269 ent = proc_mkdir("rpc", proc_net);
271 ent->owner = THIS_MODULE;
280 dprintk("RPC: unregistering /proc/net/rpc\n");
283 remove_proc_entry("net/rpc", NULL);