summaryrefslogtreecommitdiff
path: root/net/sunrpc/stats.c
blob: 790941e8af4daf6b77d6c549d6cba2c11c7d44ac (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
/*
 * linux/net/sunrpc/stats.c
 *
 * procfs-based user access to generic RPC statistics. The stats files
 * reside in /proc/net/rpc.
 *
 * The read routines assume that the buffer passed in is just big enough.
 * If you implement an RPC service that has its own stats routine which
 * appends the generic RPC stats, make sure you don't exceed the PAGE_SIZE
 * limit.
 *
 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
 */

#include <linux/module.h>

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/metrics.h>

#define RPCDBG_FACILITY	RPCDBG_MISC

struct proc_dir_entry	*proc_net_rpc = NULL;

/*
 * Get RPC client stats
 */
static int rpc_proc_show(struct seq_file *seq, void *v) {
	const struct rpc_stat	*statp = seq->private;
	const struct rpc_program *prog = statp->program;
	int		i, j;

	seq_printf(seq,
		"net %u %u %u %u\n",
			statp->netcnt,
			statp->netudpcnt,
			statp->nettcpcnt,
			statp->nettcpconn);
	seq_printf(seq,
		"rpc %u %u %u\n",
			statp->rpccnt,
			statp->rpcretrans,
			statp->rpcauthrefresh);

	for (i = 0; i < prog->nrvers; i++) {
		const struct rpc_version *vers = prog->version[i];
		if (!vers)
			continue;
		seq_printf(seq, "proc%u %u",
					vers->number, vers->nrprocs);
		for (j = 0; j < vers->nrprocs; j++)
			seq_printf(seq, " %u",
					vers->procs[j].p_count);
		seq_putc(seq, '\n');
	}
	return 0;
}

static int rpc_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, rpc_proc_show, PDE(inode)->data);
}

static struct file_operations rpc_proc_fops = {
	.owner = THIS_MODULE,
	.open = rpc_proc_open,
	.read  = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

/*
 * Get RPC server stats
 */
void svc_seq_show(struct seq_file *seq, const struct svc_stat *statp) {
	const struct svc_program *prog = statp->program;
	const struct svc_procedure *proc;
	const struct svc_version *vers;
	int		i, j;

	seq_printf(seq,
		"net %u %u %u %u\n",
			statp->netcnt,
			statp->netudpcnt,
			statp->nettcpcnt,
			statp->nettcpconn);
	seq_printf(seq,
		"rpc %u %u %u %u %u\n",
			statp->rpccnt,
			statp->rpcbadfmt+statp->rpcbadauth+statp->rpcbadclnt,
			statp->rpcbadfmt,
			statp->rpcbadauth,
			statp->rpcbadclnt);

	for (i = 0; i < prog->pg_nvers; i++) {
		if (!(vers = prog->pg_vers[i]) || !(proc = vers->vs_proc))
			continue;
		seq_printf(seq, "proc%d %u", i, vers->vs_nproc);
		for (j = 0; j < vers->vs_nproc; j++, proc++)
			seq_printf(seq, " %u", proc->pc_count);
		seq_putc(seq, '\n');
	}
}

/**
 * rpc_alloc_iostats - allocate an rpc_iostats structure
 * @clnt: RPC program, version, and xprt
 *
 */
struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt)
{
	unsigned int ops = clnt->cl_maxproc;
	size_t size = ops * sizeof(struct rpc_iostats);
	struct rpc_iostats *new;

	new = kmalloc(size, GFP_KERNEL);
	if (new)
		memset(new, 0 , size);
	return new;
}
EXPORT_SYMBOL(rpc_alloc_iostats);

/**
 * rpc_free_iostats - release an rpc_iostats structure
 * @stats: doomed rpc_iostats structure
 *
 */
void rpc_free_iostats(struct rpc_iostats *stats)
{
	kfree(stats);
}
EXPORT_SYMBOL(rpc_free_iostats);

/**
 * rpc_count_iostats - tally up per-task stats
 * @task: completed rpc_task
 *
 * Relies on the caller for serialization.
 */
void rpc_count_iostats(struct rpc_task *task)
{
	struct rpc_rqst *req = task->tk_rqstp;
	struct rpc_iostats *stats = task->tk_client->cl_metrics;
	struct rpc_iostats *op_metrics;
	long rtt, execute, queue;

	if (!stats || !req)
		return;
	op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx];

	op_metrics->om_ops++;
	op_metrics->om_ntrans += req->rq_ntrans;
	op_metrics->om_timeouts += task->tk_timeouts;

	op_metrics->om_bytes_sent += task->tk_bytes_sent;
	op_metrics->om_bytes_recv += req->rq_received;

	queue = (long)req->rq_xtime - task->tk_start;
	if (queue < 0)
		queue = -queue;
	op_metrics->om_queue += queue;

	rtt = task->tk_rtt;
	if (rtt < 0)
		rtt = -rtt;
	op_metrics->om_rtt += rtt;

	execute = (long)jiffies - task->tk_start;
	if (execute < 0)
		execute = -execute;
	op_metrics->om_execute += execute;
}

void _print_name(struct seq_file *seq, unsigned int op, struct rpc_procinfo *procs)
{
	if (procs[op].p_name)
		seq_printf(seq, "\t%12s: ", procs[op].p_name);
	else if (op == 0)
		seq_printf(seq, "\t        NULL: ");
	else
		seq_printf(seq, "\t%12u: ", op);
}

#define MILLISECS_PER_JIFFY	(1000 / HZ)

void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
{
	struct rpc_iostats *stats = clnt->cl_metrics;
	struct rpc_xprt *xprt = clnt->cl_xprt;
	unsigned int op, maxproc = clnt->cl_maxproc;

	if (!stats)
		return;

	seq_printf(seq, "\tRPC iostats version: %s  ", RPC_IOSTATS_VERS);
	seq_printf(seq, "p/v: %u/%u (%s)\n",
			clnt->cl_prog, clnt->cl_vers, clnt->cl_protname);

	if (xprt)
		xprt->ops->print_stats(xprt, seq);

	seq_printf(seq, "\tper-op statistics\n");
	for (op = 0; op < maxproc; op++) {
		struct rpc_iostats *metrics = &stats[op];
		_print_name(seq, op, clnt->cl_procinfo);
		seq_printf(seq, "%lu %lu %lu %Lu %Lu %Lu %Lu %Lu\n",
				metrics->om_ops,
				metrics->om_ntrans,
				metrics->om_timeouts,
				metrics->om_bytes_sent,
				metrics->om_bytes_recv,
				metrics->om_queue * MILLISECS_PER_JIFFY,
				metrics->om_rtt * MILLISECS_PER_JIFFY,
				metrics->om_execute * MILLISECS_PER_JIFFY);
	}
}
EXPORT_SYMBOL(rpc_print_iostats);

/*
 * Register/unregister RPC proc files
 */
static inline struct proc_dir_entry *
do_register(const char *name, void *data, struct file_operations *fops)
{
	struct proc_dir_entry *ent;

	rpc_proc_init();
	dprintk("RPC: registering /proc/net/rpc/%s\n", name);

	ent = create_proc_entry(name, 0, proc_net_rpc);
	if (ent) {
		ent->proc_fops = fops;
		ent->data = data;
	}
	return ent;
}

struct proc_dir_entry *
rpc_proc_register(struct rpc_stat *statp)
{
	return do_register(statp->program->name, statp, &rpc_proc_fops);
}

void
rpc_proc_unregister(const char *name)
{
	remove_proc_entry(name, proc_net_rpc);
}

struct proc_dir_entry *
svc_proc_register(struct svc_stat *statp, struct file_operations *fops)
{
	return do_register(statp->program->pg_name, statp, fops);
}

void
svc_proc_unregister(const char *name)
{
	remove_proc_entry(name, proc_net_rpc);
}

void
rpc_proc_init(void)
{
	dprintk("RPC: registering /proc/net/rpc\n");
	if (!proc_net_rpc) {
		struct proc_dir_entry *ent;
		ent = proc_mkdir("rpc", proc_net);
		if (ent) {
			ent->owner = THIS_MODULE;
			proc_net_rpc = ent;
		}
	}
}

void
rpc_proc_exit(void)
{
	dprintk("RPC: unregistering /proc/net/rpc\n");
	if (proc_net_rpc) {
		proc_net_rpc = NULL;
		remove_proc_entry("net/rpc", NULL);
	}
}