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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 <trace/events/sunrpc.h>
28
29#include "netns.h"
30
31#define RPCDBG_FACILITY RPCDBG_MISC
32
33
34
35
36static 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;
39 unsigned int i, j;
40
41 seq_printf(seq,
42 "net %u %u %u %u\n",
43 statp->netcnt,
44 statp->netudpcnt,
45 statp->nettcpcnt,
46 statp->nettcpconn);
47 seq_printf(seq,
48 "rpc %u %u %u\n",
49 statp->rpccnt,
50 statp->rpcretrans,
51 statp->rpcauthrefresh);
52
53 for (i = 0; i < prog->nrvers; i++) {
54 const struct rpc_version *vers = prog->version[i];
55 if (!vers)
56 continue;
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]);
61 seq_putc(seq, '\n');
62 }
63 return 0;
64}
65
66static int rpc_proc_open(struct inode *inode, struct file *file)
67{
68 return single_open(file, rpc_proc_show, PDE_DATA(inode));
69}
70
71static const struct file_operations rpc_proc_fops = {
72 .owner = THIS_MODULE,
73 .open = rpc_proc_open,
74 .read = seq_read,
75 .llseek = seq_lseek,
76 .release = single_release,
77};
78
79
80
81
82void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp)
83{
84 const struct svc_program *prog = statp->program;
85 const struct svc_version *vers;
86 unsigned int i, j;
87
88 seq_printf(seq,
89 "net %u %u %u %u\n",
90 statp->netcnt,
91 statp->netudpcnt,
92 statp->nettcpcnt,
93 statp->nettcpconn);
94 seq_printf(seq,
95 "rpc %u %u %u %u %u\n",
96 statp->rpccnt,
97 statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
98 statp->rpcbadfmt,
99 statp->rpcbadauth,
100 statp->rpcbadclnt);
101
102 for (i = 0; i < prog->pg_nvers; i++) {
103 vers = prog->pg_vers[i];
104 if (!vers)
105 continue;
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]);
109 seq_putc(seq, '\n');
110 }
111}
112EXPORT_SYMBOL_GPL(svc_seq_show);
113
114
115
116
117
118
119struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt)
120{
121 struct rpc_iostats *stats;
122 int i;
123
124 stats = kcalloc(clnt->cl_maxproc, sizeof(*stats), GFP_KERNEL);
125 if (stats) {
126 for (i = 0; i < clnt->cl_maxproc; i++)
127 spin_lock_init(&stats[i].om_lock);
128 }
129 return stats;
130}
131EXPORT_SYMBOL_GPL(rpc_alloc_iostats);
132
133
134
135
136
137
138void rpc_free_iostats(struct rpc_iostats *stats)
139{
140 kfree(stats);
141}
142EXPORT_SYMBOL_GPL(rpc_free_iostats);
143
144
145
146
147
148
149void rpc_count_iostats_metrics(const struct rpc_task *task,
150 struct rpc_iostats *op_metrics)
151{
152 struct rpc_rqst *req = task->tk_rqstp;
153 ktime_t backlog, execute, now;
154
155 if (!op_metrics || !req)
156 return;
157
158 now = ktime_get();
159 spin_lock(&op_metrics->om_lock);
160
161 op_metrics->om_ops++;
162
163 op_metrics->om_ntrans += max(req->rq_ntrans, 1);
164 op_metrics->om_timeouts += task->tk_timeouts;
165
166 op_metrics->om_bytes_sent += req->rq_xmit_bytes_sent;
167 op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd;
168
169 backlog = 0;
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);
173 }
174
175 op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt);
176
177 execute = ktime_sub(now, task->tk_start);
178 op_metrics->om_execute = ktime_add(op_metrics->om_execute, execute);
179
180 spin_unlock(&op_metrics->om_lock);
181
182 trace_rpc_stats_latency(req->rq_task, backlog, req->rq_rtt, execute);
183}
184EXPORT_SYMBOL_GPL(rpc_count_iostats_metrics);
185
186
187
188
189
190
191
192
193void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats)
194{
195 rpc_count_iostats_metrics(task,
196 &stats[task->tk_msg.rpc_proc->p_statidx]);
197}
198EXPORT_SYMBOL_GPL(rpc_count_iostats);
199
200static void _print_name(struct seq_file *seq, unsigned int op,
201 const struct rpc_procinfo *procs)
202{
203 if (procs[op].p_name)
204 seq_printf(seq, "\t%12s: ", procs[op].p_name);
205 else if (op == 0)
206 seq_printf(seq, "\t NULL: ");
207 else
208 seq_printf(seq, "\t%12u: ", op);
209}
210
211static void _add_rpc_iostats(struct rpc_iostats *a, struct rpc_iostats *b)
212{
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);
221}
222
223static void _print_rpc_iostats(struct seq_file *seq, struct rpc_iostats *stats,
224 int op, const struct rpc_procinfo *procs)
225{
226 _print_name(seq, op, procs);
227 seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
228 stats->om_ops,
229 stats->om_ntrans,
230 stats->om_timeouts,
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));
236}
237
238void rpc_clnt_show_stats(struct seq_file *seq, struct rpc_clnt *clnt)
239{
240 struct rpc_xprt *xprt;
241 unsigned int op, maxproc = clnt->cl_maxproc;
242
243 if (!clnt->cl_metrics)
244 return;
245
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);
249
250 rcu_read_lock();
251 xprt = rcu_dereference(clnt->cl_xprt);
252 if (xprt)
253 xprt->ops->print_stats(xprt, seq);
254 rcu_read_unlock();
255
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;
260 do {
261 _add_rpc_iostats(&stats, &next->cl_metrics[op]);
262 if (next == next->cl_parent)
263 break;
264 next = next->cl_parent;
265 } while (next);
266 _print_rpc_iostats(seq, &stats, op, clnt->cl_procinfo);
267 }
268}
269EXPORT_SYMBOL_GPL(rpc_clnt_show_stats);
270
271
272
273
274static inline struct proc_dir_entry *
275do_register(struct net *net, const char *name, void *data,
276 const struct file_operations *fops)
277{
278 struct sunrpc_net *sn;
279
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);
283}
284
285struct proc_dir_entry *
286rpc_proc_register(struct net *net, struct rpc_stat *statp)
287{
288 return do_register(net, statp->program->name, statp, &rpc_proc_fops);
289}
290EXPORT_SYMBOL_GPL(rpc_proc_register);
291
292void
293rpc_proc_unregister(struct net *net, const char *name)
294{
295 struct sunrpc_net *sn;
296
297 sn = net_generic(net, sunrpc_net_id);
298 remove_proc_entry(name, sn->proc_net_rpc);
299}
300EXPORT_SYMBOL_GPL(rpc_proc_unregister);
301
302struct proc_dir_entry *
303svc_proc_register(struct net *net, struct svc_stat *statp, const struct file_operations *fops)
304{
305 return do_register(net, statp->program->pg_name, statp, fops);
306}
307EXPORT_SYMBOL_GPL(svc_proc_register);
308
309void
310svc_proc_unregister(struct net *net, const char *name)
311{
312 struct sunrpc_net *sn;
313
314 sn = net_generic(net, sunrpc_net_id);
315 remove_proc_entry(name, sn->proc_net_rpc);
316}
317EXPORT_SYMBOL_GPL(svc_proc_unregister);
318
319int rpc_proc_init(struct net *net)
320{
321 struct sunrpc_net *sn;
322
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)
327 return -ENOMEM;
328
329 return 0;
330}
331
332void rpc_proc_exit(struct net *net)
333{
334 dprintk("RPC: unregistering /proc/net/rpc\n");
335 remove_proc_entry("rpc", net->proc_net);
336}
337
