Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
stats.c
Go to the documentation of this file.
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 <[email protected]>
13  */
14 
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 
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>
26 
27 #include "netns.h"
28 
29 #define RPCDBG_FACILITY RPCDBG_MISC
30 
31 /*
32  * Get RPC client stats
33  */
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;
37  unsigned int i, j;
38 
39  seq_printf(seq,
40  "net %u %u %u %u\n",
41  statp->netcnt,
42  statp->netudpcnt,
43  statp->nettcpcnt,
44  statp->nettcpconn);
45  seq_printf(seq,
46  "rpc %u %u %u\n",
47  statp->rpccnt,
48  statp->rpcretrans,
49  statp->rpcauthrefresh);
50 
51  for (i = 0; i < prog->nrvers; i++) {
52  const struct rpc_version *vers = prog->version[i];
53  if (!vers)
54  continue;
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);
60  seq_putc(seq, '\n');
61  }
62  return 0;
63 }
64 
65 static int rpc_proc_open(struct inode *inode, struct file *file)
66 {
67  return single_open(file, rpc_proc_show, PDE(inode)->data);
68 }
69 
70 static const struct file_operations rpc_proc_fops = {
71  .owner = THIS_MODULE,
72  .open = rpc_proc_open,
73  .read = seq_read,
74  .llseek = seq_lseek,
75  .release = single_release,
76 };
77 
78 /*
79  * Get RPC server stats
80  */
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;
85  unsigned int i, j;
86 
87  seq_printf(seq,
88  "net %u %u %u %u\n",
89  statp->netcnt,
90  statp->netudpcnt,
91  statp->nettcpcnt,
92  statp->nettcpconn);
93  seq_printf(seq,
94  "rpc %u %u %u %u %u\n",
95  statp->rpccnt,
96  statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
97  statp->rpcbadfmt,
98  statp->rpcbadauth,
99  statp->rpcbadclnt);
100 
101  for (i = 0; i < prog->pg_nvers; i++) {
102  if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc))
103  continue;
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);
107  seq_putc(seq, '\n');
108  }
109 }
111 
118 {
119  return kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL);
120 }
122 
129 {
130  kfree(stats);
131 }
133 
141 void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats)
142 {
143  struct rpc_rqst *req = task->tk_rqstp;
144  struct rpc_iostats *op_metrics;
145  ktime_t delta;
146 
147  if (!stats || !req)
148  return;
149 
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 += req->rq_xmit_bytes_sent;
157  op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd;
158 
159  delta = ktime_sub(req->rq_xtime, task->tk_start);
160  op_metrics->om_queue = ktime_add(op_metrics->om_queue, delta);
161 
162  op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt);
163 
164  delta = ktime_sub(ktime_get(), task->tk_start);
165  op_metrics->om_execute = ktime_add(op_metrics->om_execute, delta);
166 }
168 
169 static void _print_name(struct seq_file *seq, unsigned int op,
170  struct rpc_procinfo *procs)
171 {
172  if (procs[op].p_name)
173  seq_printf(seq, "\t%12s: ", procs[op].p_name);
174  else if (op == 0)
175  seq_printf(seq, "\t NULL: ");
176  else
177  seq_printf(seq, "\t%12u: ", op);
178 }
179 
180 void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
181 {
182  struct rpc_iostats *stats = clnt->cl_metrics;
183  struct rpc_xprt *xprt;
184  unsigned int op, maxproc = clnt->cl_maxproc;
185 
186  if (!stats)
187  return;
188 
189  seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS);
190  seq_printf(seq, "p/v: %u/%u (%s)\n",
191  clnt->cl_prog, clnt->cl_vers, clnt->cl_protname);
192 
193  rcu_read_lock();
194  xprt = rcu_dereference(clnt->cl_xprt);
195  if (xprt)
196  xprt->ops->print_stats(xprt, seq);
197  rcu_read_unlock();
198 
199  seq_printf(seq, "\tper-op statistics\n");
200  for (op = 0; op < maxproc; op++) {
201  struct rpc_iostats *metrics = &stats[op];
202  _print_name(seq, op, clnt->cl_procinfo);
203  seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
204  metrics->om_ops,
205  metrics->om_ntrans,
206  metrics->om_timeouts,
207  metrics->om_bytes_sent,
208  metrics->om_bytes_recv,
209  ktime_to_ms(metrics->om_queue),
210  ktime_to_ms(metrics->om_rtt),
211  ktime_to_ms(metrics->om_execute));
212  }
213 }
215 
216 /*
217  * Register/unregister RPC proc files
218  */
219 static inline struct proc_dir_entry *
220 do_register(struct net *net, const char *name, void *data,
221  const struct file_operations *fops)
222 {
223  struct sunrpc_net *sn;
224 
225  dprintk("RPC: registering /proc/net/rpc/%s\n", name);
226  sn = net_generic(net, sunrpc_net_id);
227  return proc_create_data(name, 0, sn->proc_net_rpc, fops, data);
228 }
229 
230 struct proc_dir_entry *
231 rpc_proc_register(struct net *net, struct rpc_stat *statp)
232 {
233  return do_register(net, statp->program->name, statp, &rpc_proc_fops);
234 }
236 
237 void
238 rpc_proc_unregister(struct net *net, const char *name)
239 {
240  struct sunrpc_net *sn;
241 
242  sn = net_generic(net, sunrpc_net_id);
243  remove_proc_entry(name, sn->proc_net_rpc);
244 }
246 
247 struct proc_dir_entry *
248 svc_proc_register(struct net *net, struct svc_stat *statp, const struct file_operations *fops)
249 {
250  return do_register(net, statp->program->pg_name, statp, fops);
251 }
253 
254 void
255 svc_proc_unregister(struct net *net, const char *name)
256 {
257  struct sunrpc_net *sn;
258 
259  sn = net_generic(net, sunrpc_net_id);
260  remove_proc_entry(name, sn->proc_net_rpc);
261 }
263 
264 int rpc_proc_init(struct net *net)
265 {
266  struct sunrpc_net *sn;
267 
268  dprintk("RPC: registering /proc/net/rpc\n");
269  sn = net_generic(net, sunrpc_net_id);
270  sn->proc_net_rpc = proc_mkdir("rpc", net->proc_net);
271  if (sn->proc_net_rpc == NULL)
272  return -ENOMEM;
273 
274  return 0;
275 }
276 
277 void rpc_proc_exit(struct net *net)
278 {
279  dprintk("RPC: unregistering /proc/net/rpc\n");
280  remove_proc_entry("rpc", net->proc_net);
281 }
282