Release 4.15 net/sunrpc/stats.c

/*
 * 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/slab.h>

#include <linux/init.h>
#include <linux/kernel.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>
#include <linux/rcupdate.h>

#include "netns.h"


#define RPCDBG_FACILITY	RPCDBG_MISC

/*
 * 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;
	unsigned 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->counts[j]);
		seq_putc(seq, '\n');
	}
	return 0;
}

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2
33.33%
Andrew Morton
34
19.65%
1
16.67%
Max Kellermann
4
2.31%
1
16.67%
Christoph Hellwig
1
0.58%
1
16.67%
Chuck Lever
1
0.58%
1
16.67%
Total
173
100.00%
6
100.00%



static int rpc_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, rpc_proc_show, PDE_DATA(inode));
}

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3
10.34%
1
33.33%
Al Viro
1
3.45%
1
33.33%
Total
29
100.00%
3
100.00%


static const 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_version *vers;
	unsigned 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++) {
		vers = prog->pg_vers[i];
		if (!vers)
			continue;
		seq_printf(seq, "proc%d %u", i, vers->vs_nproc);
		for (j = 0; j < vers->vs_nproc; j++)
			seq_printf(seq, " %u", vers->vs_count[j]);
		seq_putc(seq, '\n');
	}
}
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Andrew Morton
23
12.99%
1
16.67%
Christoph Hellwig
8
4.52%
1
16.67%
Max Kellermann
4
2.26%
1
16.67%
Chuck Lever
1
0.56%
1
16.67%
Total
177
100.00%
6
100.00%


EXPORT_SYMBOL_GPL(svc_seq_show);

/**
 * rpc_alloc_iostats - allocate an rpc_iostats structure
 * @clnt: RPC program, version, and xprt
 *
 */


struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt)
{
	struct rpc_iostats *stats;
	int i;

	stats = kcalloc(clnt->cl_maxproc, sizeof(*stats), GFP_KERNEL);
	if (stats) {
		for (i = 0; i < clnt->cl_maxproc; i++)
			spin_lock_init(&stats[i].om_lock);
	}
	return stats;
}
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9.72%
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72
100.00%
3
100.00%


EXPORT_SYMBOL_GPL(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);
}
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1
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EXPORT_SYMBOL_GPL(rpc_free_iostats);

/**
 * rpc_count_iostats_metrics - tally up per-task stats
 * @task: completed rpc_task
 * @op_metrics: stat structure for OP that will accumulate stats from @task
 */


void rpc_count_iostats_metrics(const struct rpc_task *task,
			       struct rpc_iostats *op_metrics)
{
	struct rpc_rqst *req = task->tk_rqstp;
	ktime_t delta, now;

	if (!op_metrics || !req)
		return;

	now = ktime_get();
	spin_lock(&op_metrics->om_lock);

	op_metrics->om_ops++;
	/* kernel API: om_ops must never become larger than om_ntrans */
	op_metrics->om_ntrans += max(req->rq_ntrans, 1);
	op_metrics->om_timeouts += task->tk_timeouts;

	op_metrics->om_bytes_sent += req->rq_xmit_bytes_sent;
	op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd;

	if (ktime_to_ns(req->rq_xtime)) {
		delta = ktime_sub(req->rq_xtime, task->tk_start);
		op_metrics->om_queue = ktime_add(op_metrics->om_queue, delta);
	}
	op_metrics->om_rtt = ktime_add(op_metrics->om_rtt, req->rq_rtt);

	delta = ktime_sub(now, task->tk_start);
	op_metrics->om_execute = ktime_add(op_metrics->om_execute, delta);

	spin_unlock(&op_metrics->om_lock);
}
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8
4.47%
2
25.00%
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4
2.23%
1
12.50%
Ricardo Labiaga
1
0.56%
1
12.50%
Total
179
100.00%
8
100.00%


EXPORT_SYMBOL_GPL(rpc_count_iostats_metrics);

/**
 * rpc_count_iostats - tally up per-task stats
 * @task: completed rpc_task
 * @stats: array of stat structures
 *
 * Uses the statidx from @task
 */


void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats)
{
	rpc_count_iostats_metrics(task,
				  &stats[task->tk_msg.rpc_proc->p_statidx]);
}
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EXPORT_SYMBOL_GPL(rpc_count_iostats);



static void _print_name(struct seq_file *seq, unsigned int op,
			const 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);
}

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1
1.47%
1
33.33%
Christoph Hellwig
1
1.47%
1
33.33%
Total
68
100.00%
3
100.00%



void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
{
	struct rpc_iostats *stats = clnt->cl_metrics;
	struct rpc_xprt *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_program->name);

	rcu_read_lock();
	xprt = rcu_dereference(clnt->cl_xprt);
	if (xprt)
		xprt->ops->print_stats(xprt, seq);
	rcu_read_unlock();

	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,
				ktime_to_ms(metrics->om_queue),
				ktime_to_ms(metrics->om_rtt),
				ktime_to_ms(metrics->om_execute));
	}
}
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18
9.14%
2
40.00%
Total
197
100.00%
5
100.00%


EXPORT_SYMBOL_GPL(rpc_print_iostats);

/*
 * Register/unregister RPC proc files
 */

static inline struct proc_dir_entry *

do_register(struct net *net, const char *name, void *data,
	    const struct file_operations *fops)
{
	struct sunrpc_net *sn;

	dprintk("RPC:       registering /proc/net/rpc/%s\n", name);
	sn = net_generic(net, sunrpc_net_id);
	return proc_create_data(name, 0, sn->proc_net_rpc, fops, data);
}

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15
22.73%
1
11.11%
Stanislav Kinsbursky
6
9.09%
1
11.11%
Andrew Morton
5
7.58%
1
11.11%
Denis V. Lunev
4
6.06%
1
11.11%
Wang Chen
2
3.03%
1
11.11%
Chuck Lever
1
1.52%
1
11.11%
Arjan van de Ven
1
1.52%
1
11.11%
Total
66
100.00%
9
100.00%


struct proc_dir_entry *

rpc_proc_register(struct net *net, struct rpc_stat *statp)
{
	return do_register(net, statp->program->name, statp, &rpc_proc_fops);
}
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7
20.59%
1
25.00%
Andrew Morton
2
5.88%
1
25.00%
Total
34
100.00%
4
100.00%


EXPORT_SYMBOL_GPL(rpc_proc_register);


void

rpc_proc_unregister(struct net *net, const char *name)
{
	struct sunrpc_net *sn;

	sn = net_generic(net, sunrpc_net_id);
	remove_proc_entry(name, sn->proc_net_rpc);
}
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17
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15
39.47%
1
25.00%
Stanislav Kinsbursky
6
15.79%
1
25.00%
Total
38
100.00%
4
100.00%


EXPORT_SYMBOL_GPL(rpc_proc_unregister);


struct proc_dir_entry *

svc_proc_register(struct net *net, struct svc_stat *statp, const struct file_operations *fops)
{
	return do_register(net, statp->program->pg_name, statp, fops);
}
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7
17.95%
2
33.33%
Andrew Morton
6
15.38%
1
16.67%
Arjan van de Ven
1
2.56%
1
16.67%
Total
39
100.00%
6
100.00%


EXPORT_SYMBOL_GPL(svc_proc_register);


void

svc_proc_unregister(struct net *net, const char *name)
{
	struct sunrpc_net *sn;

	sn = net_generic(net, sunrpc_net_id);
	remove_proc_entry(name, sn->proc_net_rpc);
}
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2
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15
39.47%
1
25.00%
Stanislav Kinsbursky
6
15.79%
1
25.00%
Total
38
100.00%
4
100.00%


EXPORT_SYMBOL_GPL(svc_proc_unregister);



int rpc_proc_init(struct net *net)
{
	struct sunrpc_net *sn;

	dprintk("RPC:       registering /proc/net/rpc\n");
	sn = net_generic(net, sunrpc_net_id);
	sn->proc_net_rpc = proc_mkdir("rpc", net->proc_net);
	if (sn->proc_net_rpc == NULL)
		return -ENOMEM;

	return 0;
}

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38
66.67%
1
14.29%
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15
26.32%
3
42.86%
Andrew Morton
2
3.51%
1
14.29%
Alexey Dobriyan
1
1.75%
1
14.29%
Chuck Lever
1
1.75%
1
14.29%
Total
57
100.00%
7
100.00%



void rpc_proc_exit(struct net *net)
{
	dprintk("RPC:       unregistering /proc/net/rpc\n");
	remove_proc_entry("rpc", net->proc_net);
}

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Linus Torvalds (pre-git)
14
58.33%
3
50.00%
Pavel Emelyanov
7
29.17%
1
16.67%
Eric W. Biedermann
2
8.33%
1
16.67%
Chuck Lever
1
4.17%
1
16.67%
Total
24
100.00%
6
100.00%

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513
37.53%
7
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Linus Torvalds (pre-git)
445
32.55%
4
10.00%
Andrew Morton
132
9.66%
1
2.50%
Pavel Emelyanov
91
6.66%
1
2.50%
Trond Myklebust
53
3.88%
7
17.50%
Weston Andros Adamson
53
3.88%
2
5.00%
Stanislav Kinsbursky
32
2.34%
2
5.00%
Christoph Hellwig
10
0.73%
3
7.50%
Max Kellermann
8
0.59%
1
2.50%
Panagiotis Issaris
7
0.51%
1
2.50%
Eric W. Biedermann
4
0.29%
1
2.50%
Denis V. Lunev
4
0.29%
1
2.50%
Tejun Heo
3
0.22%
1
2.50%
Arjan van de Ven
3
0.22%
2
5.00%
Neil Brown
3
0.22%
1
2.50%
Wang Chen
2
0.15%
1
2.50%
Ricardo Labiaga
1
0.07%
1
2.50%
Alexey Dobriyan
1
0.07%
1
2.50%
Adrian Bunk
1
0.07%
1
2.50%
Al Viro
1
0.07%
1
2.50%
Total
1367
100.00%
40
100.00%
Directory: net/sunrpc

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