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1da177e4 LT |
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 | ||
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> | |
11c556b3 | 24 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
25 | |
26 | #define RPCDBG_FACILITY RPCDBG_MISC | |
27 | ||
28 | struct proc_dir_entry *proc_net_rpc = NULL; | |
29 | ||
30 | /* | |
31 | * Get RPC client stats | |
32 | */ | |
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; | |
36 | int i, j; | |
37 | ||
38 | seq_printf(seq, | |
49e31cba | 39 | "net %u %u %u %u\n", |
1da177e4 LT |
40 | statp->netcnt, |
41 | statp->netudpcnt, | |
42 | statp->nettcpcnt, | |
43 | statp->nettcpconn); | |
44 | seq_printf(seq, | |
49e31cba | 45 | "rpc %u %u %u\n", |
1da177e4 LT |
46 | statp->rpccnt, |
47 | statp->rpcretrans, | |
48 | statp->rpcauthrefresh); | |
49 | ||
50 | for (i = 0; i < prog->nrvers; i++) { | |
51 | const struct rpc_version *vers = prog->version[i]; | |
52 | if (!vers) | |
53 | continue; | |
49e31cba | 54 | seq_printf(seq, "proc%u %u", |
1da177e4 LT |
55 | vers->number, vers->nrprocs); |
56 | for (j = 0; j < vers->nrprocs; j++) | |
49e31cba | 57 | seq_printf(seq, " %u", |
1da177e4 LT |
58 | vers->procs[j].p_count); |
59 | seq_putc(seq, '\n'); | |
60 | } | |
61 | return 0; | |
62 | } | |
63 | ||
64 | static int rpc_proc_open(struct inode *inode, struct file *file) | |
65 | { | |
66 | return single_open(file, rpc_proc_show, PDE(inode)->data); | |
67 | } | |
68 | ||
69 | static struct file_operations rpc_proc_fops = { | |
70 | .owner = THIS_MODULE, | |
71 | .open = rpc_proc_open, | |
72 | .read = seq_read, | |
73 | .llseek = seq_lseek, | |
74 | .release = single_release, | |
75 | }; | |
76 | ||
77 | /* | |
78 | * Get RPC server stats | |
79 | */ | |
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; | |
84 | int i, j; | |
85 | ||
86 | seq_printf(seq, | |
49e31cba | 87 | "net %u %u %u %u\n", |
1da177e4 LT |
88 | statp->netcnt, |
89 | statp->netudpcnt, | |
90 | statp->nettcpcnt, | |
91 | statp->nettcpconn); | |
92 | seq_printf(seq, | |
49e31cba | 93 | "rpc %u %u %u %u %u\n", |
1da177e4 LT |
94 | statp->rpccnt, |
95 | statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt, | |
96 | statp->rpcbadfmt, | |
97 | statp->rpcbadauth, | |
98 | statp->rpcbadclnt); | |
99 | ||
100 | for (i = 0; i < prog->pg_nvers; i++) { | |
101 | if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc)) | |
102 | continue; | |
49e31cba | 103 | seq_printf(seq, "proc%d %u", i, vers->vs_nproc); |
1da177e4 | 104 | for (j = 0; j < vers->vs_nproc; j++, proc++) |
49e31cba | 105 | seq_printf(seq, " %u", proc->pc_count); |
1da177e4 LT |
106 | seq_putc(seq, '\n'); |
107 | } | |
108 | } | |
109 | ||
11c556b3 CL |
110 | /** |
111 | * rpc_alloc_iostats - allocate an rpc_iostats structure | |
112 | * @clnt: RPC program, version, and xprt | |
113 | * | |
114 | */ | |
115 | struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) | |
116 | { | |
117 | unsigned int ops = clnt->cl_maxproc; | |
118 | size_t size = ops * sizeof(struct rpc_iostats); | |
119 | struct rpc_iostats *new; | |
120 | ||
121 | new = kmalloc(size, GFP_KERNEL); | |
122 | if (new) | |
123 | memset(new, 0 , size); | |
124 | return new; | |
125 | } | |
126 | EXPORT_SYMBOL(rpc_alloc_iostats); | |
127 | ||
128 | /** | |
129 | * rpc_free_iostats - release an rpc_iostats structure | |
130 | * @stats: doomed rpc_iostats structure | |
131 | * | |
132 | */ | |
133 | void rpc_free_iostats(struct rpc_iostats *stats) | |
134 | { | |
135 | kfree(stats); | |
136 | } | |
137 | EXPORT_SYMBOL(rpc_free_iostats); | |
138 | ||
139 | /** | |
140 | * rpc_count_iostats - tally up per-task stats | |
141 | * @task: completed rpc_task | |
142 | * | |
143 | * Relies on the caller for serialization. | |
144 | */ | |
145 | void rpc_count_iostats(struct rpc_task *task) | |
146 | { | |
147 | struct rpc_rqst *req = task->tk_rqstp; | |
148 | struct rpc_iostats *stats = task->tk_client->cl_metrics; | |
149 | struct rpc_iostats *op_metrics; | |
150 | long rtt, execute, queue; | |
151 | ||
152 | if (!stats || !req) | |
153 | return; | |
cc0175c1 | 154 | op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx]; |
11c556b3 CL |
155 | |
156 | op_metrics->om_ops++; | |
157 | op_metrics->om_ntrans += req->rq_ntrans; | |
158 | op_metrics->om_timeouts += task->tk_timeouts; | |
159 | ||
160 | op_metrics->om_bytes_sent += task->tk_bytes_sent; | |
161 | op_metrics->om_bytes_recv += req->rq_received; | |
162 | ||
163 | queue = (long)req->rq_xtime - task->tk_start; | |
164 | if (queue < 0) | |
165 | queue = -queue; | |
166 | op_metrics->om_queue += queue; | |
167 | ||
168 | rtt = task->tk_rtt; | |
169 | if (rtt < 0) | |
170 | rtt = -rtt; | |
171 | op_metrics->om_rtt += rtt; | |
172 | ||
173 | execute = (long)jiffies - task->tk_start; | |
174 | if (execute < 0) | |
175 | execute = -execute; | |
176 | op_metrics->om_execute += execute; | |
177 | } | |
178 | ||
ec535ce1 AB |
179 | static void _print_name(struct seq_file *seq, unsigned int op, |
180 | struct rpc_procinfo *procs) | |
cc0175c1 CL |
181 | { |
182 | if (procs[op].p_name) | |
183 | seq_printf(seq, "\t%12s: ", procs[op].p_name); | |
184 | else if (op == 0) | |
185 | seq_printf(seq, "\t NULL: "); | |
186 | else | |
187 | seq_printf(seq, "\t%12u: ", op); | |
188 | } | |
189 | ||
5eb53f41 | 190 | #define MILLISECS_PER_JIFFY (1000 / HZ) |
11c556b3 CL |
191 | |
192 | void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) | |
193 | { | |
194 | struct rpc_iostats *stats = clnt->cl_metrics; | |
195 | struct rpc_xprt *xprt = clnt->cl_xprt; | |
196 | unsigned int op, maxproc = clnt->cl_maxproc; | |
197 | ||
198 | if (!stats) | |
199 | return; | |
200 | ||
201 | seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); | |
202 | seq_printf(seq, "p/v: %u/%u (%s)\n", | |
203 | clnt->cl_prog, clnt->cl_vers, clnt->cl_protname); | |
204 | ||
205 | if (xprt) | |
206 | xprt->ops->print_stats(xprt, seq); | |
207 | ||
208 | seq_printf(seq, "\tper-op statistics\n"); | |
209 | for (op = 0; op < maxproc; op++) { | |
210 | struct rpc_iostats *metrics = &stats[op]; | |
cc0175c1 | 211 | _print_name(seq, op, clnt->cl_procinfo); |
11c556b3 CL |
212 | seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n", |
213 | metrics->om_ops, | |
214 | metrics->om_ntrans, | |
215 | metrics->om_timeouts, | |
216 | metrics->om_bytes_sent, | |
217 | metrics->om_bytes_recv, | |
218 | metrics->om_queue * MILLISECS_PER_JIFFY, | |
219 | metrics->om_rtt * MILLISECS_PER_JIFFY, | |
220 | metrics->om_execute * MILLISECS_PER_JIFFY); | |
221 | } | |
222 | } | |
223 | EXPORT_SYMBOL(rpc_print_iostats); | |
224 | ||
1da177e4 LT |
225 | /* |
226 | * Register/unregister RPC proc files | |
227 | */ | |
228 | static inline struct proc_dir_entry * | |
99ac48f5 | 229 | do_register(const char *name, void *data, const struct file_operations *fops) |
1da177e4 LT |
230 | { |
231 | struct proc_dir_entry *ent; | |
232 | ||
233 | rpc_proc_init(); | |
234 | dprintk("RPC: registering /proc/net/rpc/%s\n", name); | |
235 | ||
236 | ent = create_proc_entry(name, 0, proc_net_rpc); | |
237 | if (ent) { | |
238 | ent->proc_fops = fops; | |
239 | ent->data = data; | |
240 | } | |
241 | return ent; | |
242 | } | |
243 | ||
244 | struct proc_dir_entry * | |
245 | rpc_proc_register(struct rpc_stat *statp) | |
246 | { | |
247 | return do_register(statp->program->name, statp, &rpc_proc_fops); | |
248 | } | |
249 | ||
250 | void | |
251 | rpc_proc_unregister(const char *name) | |
252 | { | |
253 | remove_proc_entry(name, proc_net_rpc); | |
254 | } | |
255 | ||
256 | struct proc_dir_entry * | |
99ac48f5 | 257 | svc_proc_register(struct svc_stat *statp, const struct file_operations *fops) |
1da177e4 LT |
258 | { |
259 | return do_register(statp->program->pg_name, statp, fops); | |
260 | } | |
261 | ||
262 | void | |
263 | svc_proc_unregister(const char *name) | |
264 | { | |
265 | remove_proc_entry(name, proc_net_rpc); | |
266 | } | |
267 | ||
268 | void | |
269 | rpc_proc_init(void) | |
270 | { | |
271 | dprintk("RPC: registering /proc/net/rpc\n"); | |
272 | if (!proc_net_rpc) { | |
273 | struct proc_dir_entry *ent; | |
274 | ent = proc_mkdir("rpc", proc_net); | |
275 | if (ent) { | |
276 | ent->owner = THIS_MODULE; | |
277 | proc_net_rpc = ent; | |
278 | } | |
279 | } | |
280 | } | |
281 | ||
282 | void | |
283 | rpc_proc_exit(void) | |
284 | { | |
285 | dprintk("RPC: unregistering /proc/net/rpc\n"); | |
286 | if (proc_net_rpc) { | |
287 | proc_net_rpc = NULL; | |
288 | remove_proc_entry("net/rpc", NULL); | |
289 | } | |
290 | } | |
291 |