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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 <okir@monad.swb.de> | |
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_DATA(inode)); | |
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 | } | |
110 | EXPORT_SYMBOL_GPL(svc_seq_show); | |
111 | ||
112 | /** | |
113 | * rpc_alloc_iostats - allocate an rpc_iostats structure | |
114 | * @clnt: RPC program, version, and xprt | |
115 | * | |
116 | */ | |
117 | struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) | |
118 | { | |
119 | struct rpc_iostats *stats; | |
120 | int i; | |
121 | ||
122 | stats = kcalloc(clnt->cl_maxproc, sizeof(*stats), GFP_KERNEL); | |
123 | if (stats) { | |
124 | for (i = 0; i < clnt->cl_maxproc; i++) | |
125 | spin_lock_init(&stats[i].om_lock); | |
126 | } | |
127 | return stats; | |
128 | } | |
129 | EXPORT_SYMBOL_GPL(rpc_alloc_iostats); | |
130 | ||
131 | /** | |
132 | * rpc_free_iostats - release an rpc_iostats structure | |
133 | * @stats: doomed rpc_iostats structure | |
134 | * | |
135 | */ | |
136 | void rpc_free_iostats(struct rpc_iostats *stats) | |
137 | { | |
138 | kfree(stats); | |
139 | } | |
140 | EXPORT_SYMBOL_GPL(rpc_free_iostats); | |
141 | ||
142 | /** | |
143 | * rpc_count_iostats_metrics - tally up per-task stats | |
144 | * @task: completed rpc_task | |
145 | * @op_metrics: stat structure for OP that will accumulate stats from @task | |
146 | */ | |
147 | void rpc_count_iostats_metrics(const struct rpc_task *task, | |
148 | struct rpc_iostats *op_metrics) | |
149 | { | |
150 | struct rpc_rqst *req = task->tk_rqstp; | |
151 | ktime_t delta, now; | |
152 | ||
153 | if (!op_metrics || !req) | |
154 | return; | |
155 | ||
156 | now = ktime_get(); | |
157 | spin_lock(&op_metrics->om_lock); | |
158 | ||
159 | op_metrics->om_ops++; | |
160 | /* kernel API: om_ops must never become larger than om_ntrans */ | |
161 | op_metrics->om_ntrans += max(req->rq_ntrans, 1); | |
162 | op_metrics->om_timeouts += task->tk_timeouts; | |
163 | ||
164 | op_metrics->om_bytes_sent += req->rq_xmit_bytes_sent; | |
165 | op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd; | |
166 | ||
167 | if (ktime_to_ns(req->rq_xtime)) { | |
168 | delta = ktime_sub(req->rq_xtime, task->tk_start); | |
169 | op_metrics->om_queue = ktime_add(op_metrics->om_queue, delta); | |
170 | } | |
171 | op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt); | |
172 | ||
173 | delta = ktime_sub(now, task->tk_start); | |
174 | op_metrics->om_execute = ktime_add(op_metrics->om_execute, delta); | |
175 | ||
176 | spin_unlock(&op_metrics->om_lock); | |
177 | } | |
178 | EXPORT_SYMBOL_GPL(rpc_count_iostats_metrics); | |
179 | ||
180 | /** | |
181 | * rpc_count_iostats - tally up per-task stats | |
182 | * @task: completed rpc_task | |
183 | * @stats: array of stat structures | |
184 | * | |
185 | * Uses the statidx from @task | |
186 | */ | |
187 | void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats) | |
188 | { | |
189 | rpc_count_iostats_metrics(task, | |
190 | &stats[task->tk_msg.rpc_proc->p_statidx]); | |
191 | } | |
192 | EXPORT_SYMBOL_GPL(rpc_count_iostats); | |
193 | ||
194 | static void _print_name(struct seq_file *seq, unsigned int op, | |
195 | struct rpc_procinfo *procs) | |
196 | { | |
197 | if (procs[op].p_name) | |
198 | seq_printf(seq, "\t%12s: ", procs[op].p_name); | |
199 | else if (op == 0) | |
200 | seq_printf(seq, "\t NULL: "); | |
201 | else | |
202 | seq_printf(seq, "\t%12u: ", op); | |
203 | } | |
204 | ||
205 | void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) | |
206 | { | |
207 | struct rpc_iostats *stats = clnt->cl_metrics; | |
208 | struct rpc_xprt *xprt; | |
209 | unsigned int op, maxproc = clnt->cl_maxproc; | |
210 | ||
211 | if (!stats) | |
212 | return; | |
213 | ||
214 | seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); | |
215 | seq_printf(seq, "p/v: %u/%u (%s)\n", | |
216 | clnt->cl_prog, clnt->cl_vers, clnt->cl_program->name); | |
217 | ||
218 | rcu_read_lock(); | |
219 | xprt = rcu_dereference(clnt->cl_xprt); | |
220 | if (xprt) | |
221 | xprt->ops->print_stats(xprt, seq); | |
222 | rcu_read_unlock(); | |
223 | ||
224 | seq_printf(seq, "\tper-op statistics\n"); | |
225 | for (op = 0; op < maxproc; op++) { | |
226 | struct rpc_iostats *metrics = &stats[op]; | |
227 | _print_name(seq, op, clnt->cl_procinfo); | |
228 | seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n", | |
229 | metrics->om_ops, | |
230 | metrics->om_ntrans, | |
231 | metrics->om_timeouts, | |
232 | metrics->om_bytes_sent, | |
233 | metrics->om_bytes_recv, | |
234 | ktime_to_ms(metrics->om_queue), | |
235 | ktime_to_ms(metrics->om_rtt), | |
236 | ktime_to_ms(metrics->om_execute)); | |
237 | } | |
238 | } | |
239 | EXPORT_SYMBOL_GPL(rpc_print_iostats); | |
240 | ||
241 | /* | |
242 | * Register/unregister RPC proc files | |
243 | */ | |
244 | static inline struct proc_dir_entry * | |
245 | do_register(struct net *net, const char *name, void *data, | |
246 | const struct file_operations *fops) | |
247 | { | |
248 | struct sunrpc_net *sn; | |
249 | ||
250 | dprintk("RPC: registering /proc/net/rpc/%s\n", name); | |
251 | sn = net_generic(net, sunrpc_net_id); | |
252 | return proc_create_data(name, 0, sn->proc_net_rpc, fops, data); | |
253 | } | |
254 | ||
255 | struct proc_dir_entry * | |
256 | rpc_proc_register(struct net *net, struct rpc_stat *statp) | |
257 | { | |
258 | return do_register(net, statp->program->name, statp, &rpc_proc_fops); | |
259 | } | |
260 | EXPORT_SYMBOL_GPL(rpc_proc_register); | |
261 | ||
262 | void | |
263 | rpc_proc_unregister(struct net *net, const char *name) | |
264 | { | |
265 | struct sunrpc_net *sn; | |
266 | ||
267 | sn = net_generic(net, sunrpc_net_id); | |
268 | remove_proc_entry(name, sn->proc_net_rpc); | |
269 | } | |
270 | EXPORT_SYMBOL_GPL(rpc_proc_unregister); | |
271 | ||
272 | struct proc_dir_entry * | |
273 | svc_proc_register(struct net *net, struct svc_stat *statp, const struct file_operations *fops) | |
274 | { | |
275 | return do_register(net, statp->program->pg_name, statp, fops); | |
276 | } | |
277 | EXPORT_SYMBOL_GPL(svc_proc_register); | |
278 | ||
279 | void | |
280 | svc_proc_unregister(struct net *net, const char *name) | |
281 | { | |
282 | struct sunrpc_net *sn; | |
283 | ||
284 | sn = net_generic(net, sunrpc_net_id); | |
285 | remove_proc_entry(name, sn->proc_net_rpc); | |
286 | } | |
287 | EXPORT_SYMBOL_GPL(svc_proc_unregister); | |
288 | ||
289 | int rpc_proc_init(struct net *net) | |
290 | { | |
291 | struct sunrpc_net *sn; | |
292 | ||
293 | dprintk("RPC: registering /proc/net/rpc\n"); | |
294 | sn = net_generic(net, sunrpc_net_id); | |
295 | sn->proc_net_rpc = proc_mkdir("rpc", net->proc_net); | |
296 | if (sn->proc_net_rpc == NULL) | |
297 | return -ENOMEM; | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | void rpc_proc_exit(struct net *net) | |
303 | { | |
304 | dprintk("RPC: unregistering /proc/net/rpc\n"); | |
305 | remove_proc_entry("rpc", net->proc_net); | |
306 | } | |
307 |