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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 | |
26 | #include "netns.h" |
27 | |
28 | #define RPCDBG_FACILITY RPCDBG_MISC |
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 | unsigned int i, j; |
37 | |
38 | seq_printf(seq, |
39 | "net %u %u %u %u\n", |
40 | statp->netcnt, |
41 | statp->netudpcnt, |
42 | statp->nettcpcnt, |
43 | statp->nettcpconn); |
44 | seq_printf(seq, |
45 | "rpc %u %u %u\n", |
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; |
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); |
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 const 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 | unsigned int i, j; |
85 | |
86 | seq_printf(seq, |
87 | "net %u %u %u %u\n", |
88 | statp->netcnt, |
89 | statp->netudpcnt, |
90 | statp->nettcpcnt, |
91 | statp->nettcpconn); |
92 | seq_printf(seq, |
93 | "rpc %u %u %u %u %u\n", |
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; |
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); |
106 | seq_putc(seq, '\n'); |
107 | } |
108 | } |
109 | EXPORT_SYMBOL_GPL(svc_seq_show); |
110 | |
111 | /** |
112 | * rpc_alloc_iostats - allocate an rpc_iostats structure |
113 | * @clnt: RPC program, version, and xprt |
114 | * |
115 | */ |
116 | struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) |
117 | { |
118 | return kcalloc(clnt->cl_maxproc, sizeof(struct rpc_iostats), GFP_KERNEL); |
119 | } |
120 | EXPORT_SYMBOL_GPL(rpc_alloc_iostats); |
121 | |
122 | /** |
123 | * rpc_free_iostats - release an rpc_iostats structure |
124 | * @stats: doomed rpc_iostats structure |
125 | * |
126 | */ |
127 | void rpc_free_iostats(struct rpc_iostats *stats) |
128 | { |
129 | kfree(stats); |
130 | } |
131 | EXPORT_SYMBOL_GPL(rpc_free_iostats); |
132 | |
133 | /** |
134 | * rpc_count_iostats - tally up per-task stats |
135 | * @task: completed rpc_task |
136 | * |
137 | * Relies on the caller for serialization. |
138 | */ |
139 | void rpc_count_iostats(struct rpc_task *task) |
140 | { |
141 | struct rpc_rqst *req = task->tk_rqstp; |
142 | struct rpc_iostats *stats; |
143 | struct rpc_iostats *op_metrics; |
144 | ktime_t delta; |
145 | |
146 | if (!task->tk_client || !task->tk_client->cl_metrics || !req) |
147 | return; |
148 | |
149 | stats = task->tk_client->cl_metrics; |
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 | } |
167 | |
168 | static void _print_name(struct seq_file *seq, unsigned int op, |
169 | struct rpc_procinfo *procs) |
170 | { |
171 | if (procs[op].p_name) |
172 | seq_printf(seq, "\t%12s: ", procs[op].p_name); |
173 | else if (op == 0) |
174 | seq_printf(seq, "\t NULL: "); |
175 | else |
176 | seq_printf(seq, "\t%12u: ", op); |
177 | } |
178 | |
179 | void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) |
180 | { |
181 | struct rpc_iostats *stats = clnt->cl_metrics; |
182 | struct rpc_xprt *xprt = clnt->cl_xprt; |
183 | unsigned int op, maxproc = clnt->cl_maxproc; |
184 | |
185 | if (!stats) |
186 | return; |
187 | |
188 | seq_printf(seq, "\tRPC iostats version: %s ", RPC_IOSTATS_VERS); |
189 | seq_printf(seq, "p/v: %u/%u (%s)\n", |
190 | clnt->cl_prog, clnt->cl_vers, clnt->cl_protname); |
191 | |
192 | if (xprt) |
193 | xprt->ops->print_stats(xprt, seq); |
194 | |
195 | seq_printf(seq, "\tper-op statistics\n"); |
196 | for (op = 0; op < maxproc; op++) { |
197 | struct rpc_iostats *metrics = &stats[op]; |
198 | _print_name(seq, op, clnt->cl_procinfo); |
199 | seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n", |
200 | metrics->om_ops, |
201 | metrics->om_ntrans, |
202 | metrics->om_timeouts, |
203 | metrics->om_bytes_sent, |
204 | metrics->om_bytes_recv, |
205 | ktime_to_ms(metrics->om_queue), |
206 | ktime_to_ms(metrics->om_rtt), |
207 | ktime_to_ms(metrics->om_execute)); |
208 | } |
209 | } |
210 | EXPORT_SYMBOL_GPL(rpc_print_iostats); |
211 | |
212 | /* |
213 | * Register/unregister RPC proc files |
214 | */ |
215 | static inline struct proc_dir_entry * |
216 | do_register(const char *name, void *data, const struct file_operations *fops) |
217 | { |
218 | struct sunrpc_net *sn; |
219 | |
220 | dprintk("RPC: registering /proc/net/rpc/%s\n", name); |
221 | sn = net_generic(&init_net, sunrpc_net_id); |
222 | return proc_create_data(name, 0, sn->proc_net_rpc, fops, data); |
223 | } |
224 | |
225 | struct proc_dir_entry * |
226 | rpc_proc_register(struct rpc_stat *statp) |
227 | { |
228 | return do_register(statp->program->name, statp, &rpc_proc_fops); |
229 | } |
230 | EXPORT_SYMBOL_GPL(rpc_proc_register); |
231 | |
232 | void |
233 | rpc_proc_unregister(const char *name) |
234 | { |
235 | struct sunrpc_net *sn; |
236 | |
237 | sn = net_generic(&init_net, sunrpc_net_id); |
238 | remove_proc_entry(name, sn->proc_net_rpc); |
239 | } |
240 | EXPORT_SYMBOL_GPL(rpc_proc_unregister); |
241 | |
242 | struct proc_dir_entry * |
243 | svc_proc_register(struct svc_stat *statp, const struct file_operations *fops) |
244 | { |
245 | return do_register(statp->program->pg_name, statp, fops); |
246 | } |
247 | EXPORT_SYMBOL_GPL(svc_proc_register); |
248 | |
249 | void |
250 | svc_proc_unregister(const char *name) |
251 | { |
252 | struct sunrpc_net *sn; |
253 | |
254 | sn = net_generic(&init_net, sunrpc_net_id); |
255 | remove_proc_entry(name, sn->proc_net_rpc); |
256 | } |
257 | EXPORT_SYMBOL_GPL(svc_proc_unregister); |
258 | |
259 | int rpc_proc_init(struct net *net) |
260 | { |
261 | struct sunrpc_net *sn; |
262 | |
263 | dprintk("RPC: registering /proc/net/rpc\n"); |
264 | sn = net_generic(net, sunrpc_net_id); |
265 | sn->proc_net_rpc = proc_mkdir("rpc", net->proc_net); |
266 | if (sn->proc_net_rpc == NULL) |
267 | return -ENOMEM; |
268 | |
269 | return 0; |
270 | } |
271 | |
272 | void rpc_proc_exit(struct net *net) |
273 | { |
274 | dprintk("RPC: unregistering /proc/net/rpc\n"); |
275 | remove_proc_entry("rpc", net->proc_net); |
276 | } |
277 | |
278 |
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