[mirror_ubuntu-jammy-kernel.git] / fs / nfsd / stats.c

// SPDX-License-Identifier: GPL-2.0
/*
 * procfs-based user access to knfsd statistics
 *
 * /proc/net/rpc/nfsd
 *
 * Format:
 *	rc <hits> <misses> <nocache>
 *			Statistsics for the reply cache
 *	fh <stale> <deprecated filehandle cache stats>
 *			statistics for filehandle lookup
 *	io <bytes-read> <bytes-written>
 *			statistics for IO throughput
 *	th <threads> <deprecated thread usage histogram stats>
 *			number of threads
 *	ra <deprecated ra-cache stats>
 *
 *	plus generic RPC stats (see net/sunrpc/stats.c)
 *
 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
 */

#include <linux/seq_file.h>
#include <linux/module.h>
#include <linux/sunrpc/stats.h>
#include <net/net_namespace.h>

#include "nfsd.h"

struct nfsd_stats	nfsdstats;
struct svc_stat		nfsd_svcstats = {
	.program	= &nfsd_program,
};

static int nfsd_proc_show(struct seq_file *seq, void *v)
{
	int i;

	seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
		   percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_HITS]),
		   percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_MISSES]),
		   percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]),
		   percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_FH_STALE]),
		   percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_READ]),
		   percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_WRITE]));

	/* thread usage: */
	seq_printf(seq, "th %u 0", nfsdstats.th_cnt);

	/* deprecated thread usage histogram stats */
	for (i = 0; i < 10; i++)
		seq_puts(seq, " 0.000");

	/* deprecated ra-cache stats */
	seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n");

	/* show my rpc info */
	svc_seq_show(seq, &nfsd_svcstats);

#ifdef CONFIG_NFSD_V4
	/* Show count for individual nfsv4 operations */
	/* Writing operation numbers 0 1 2 also for maintaining uniformity */
	seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
	for (i = 0; i <= LAST_NFS4_OP; i++) {
		seq_printf(seq, " %lld",
			   percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_NFS4_OP(i)]));
	}

	seq_putc(seq, '\n');
#endif

	return 0;
}

static int nfsd_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, nfsd_proc_show, NULL);
}

static const struct proc_ops nfsd_proc_ops = {
	.proc_open	= nfsd_proc_open,
	.proc_read	= seq_read,
	.proc_lseek	= seq_lseek,
	.proc_release	= single_release,
};

int nfsd_percpu_counters_init(struct percpu_counter counters[], int num)
{
	int i, err = 0;

	for (i = 0; !err && i < num; i++)
		err = percpu_counter_init(&counters[i], 0, GFP_KERNEL);

	if (!err)
		return 0;

	for (; i > 0; i--)
		percpu_counter_destroy(&counters[i-1]);

	return err;
}

void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num)
{
	int i;

	for (i = 0; i < num; i++)
		percpu_counter_set(&counters[i], 0);
}

void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num)
{
	int i;

	for (i = 0; i < num; i++)
		percpu_counter_destroy(&counters[i]);
}

static int nfsd_stat_counters_init(void)
{
	return nfsd_percpu_counters_init(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
}

static void nfsd_stat_counters_destroy(void)
{
	nfsd_percpu_counters_destroy(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
}

int nfsd_stat_init(void)
{
	int err;

	err = nfsd_stat_counters_init();
	if (err)
		return err;

	svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_ops);

	return 0;
}

void nfsd_stat_shutdown(void)
{
	nfsd_stat_counters_destroy();
	svc_proc_unregister(&init_net, "nfsd");
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4	2	/*
1da177e4 LT	3	* procfs-based user access to knfsd statistics
	4	*
	5	* /proc/net/rpc/nfsd
	6	*
	7	* Format:
	8	* rc <hits> <misses> <nocache>
	9	* Statistsics for the reply cache
1b76d1df	10	* fh <stale> <deprecated filehandle cache stats>
1da177e4	11	* statistics for filehandle lookup
70f23fd6	12	* io <bytes-read> <bytes-written>
1da177e4	13	* statistics for IO throughput
1b76d1df AG	14	* th <threads> <deprecated thread usage histogram stats>
	15	* number of threads
	16	* ra <deprecated ra-cache stats>
	17	*
1da177e4 LT	18	* plus generic RPC stats (see net/sunrpc/stats.c)
	19	*
	20	* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
	21	*/
	22
1da177e4	23	#include <linux/seq_file.h>
1da177e4	24	#include <linux/module.h>
1da177e4	25	#include <linux/sunrpc/stats.h>
246590f5	26	#include <net/net_namespace.h>
1da177e4	27
9a74af21 BH	28	#include "nfsd.h"
9a74af21 BH	29
1da177e4 LT	30	struct nfsd_stats nfsdstats;
	31	struct svc_stat nfsd_svcstats = {
	32	.program = &nfsd_program,
	33	};
	34
	35	static int nfsd_proc_show(struct seq_file seq, void v)
	36	{
	37	int i;
	38
e567b98c AG	39	seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
	40	percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_HITS]),
	41	percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_MISSES]),
	42	percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]),
	43	percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_FH_STALE]),
	44	percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_READ]),
	45	percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_WRITE]));
1b76d1df	46
1da177e4	47	/* thread usage: */
1b76d1df AG	48	seq_printf(seq, "th %u 0", nfsdstats.th_cnt);
	49
	50	/* deprecated thread usage histogram stats */
	51	for (i = 0; i < 10; i++)
	52	seq_puts(seq, " 0.000");
	53
	54	/* deprecated ra-cache stats */
	55	seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n");
	56
1da177e4 LT	57	/* show my rpc info */
	58	svc_seq_show(seq, &nfsd_svcstats);
	59
e2b20950 SA	60	#ifdef CONFIG_NFSD_V4
	61	/* Show count for individual nfsv4 operations */
	62	/* Writing operation numbers 0 1 2 also for maintaining uniformity */
	63	seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
e567b98c AG	64	for (i = 0; i <= LAST_NFS4_OP; i++) {
	65	seq_printf(seq, " %lld",
	66	percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_NFS4_OP(i)]));
	67	}
e2b20950 SA	68
	69	seq_putc(seq, '\n');
	70	#endif
	71
1da177e4 LT	72	return 0;
	73	}
	74
	75	static int nfsd_proc_open(struct inode inode, struct file file)
	76	{
	77	return single_open(file, nfsd_proc_show, NULL);
	78	}
	79
97a32539 AD	80	static const struct proc_ops nfsd_proc_ops = {
	81	.proc_open = nfsd_proc_open,
	82	.proc_read = seq_read,
	83	.proc_lseek = seq_lseek,
	84	.proc_release = single_release,
1da177e4 LT	85	};
1da177e4 LT	86
e567b98c	87	int nfsd_percpu_counters_init(struct percpu_counter counters[], int num)
1da177e4	88	{
e567b98c AG	89	int i, err = 0;
	90
	91	for (i = 0; !err && i < num; i++)
	92	err = percpu_counter_init(&counters[i], 0, GFP_KERNEL);
	93
	94	if (!err)
	95	return 0;
	96
	97	for (; i > 0; i--)
	98	percpu_counter_destroy(&counters[i-1]);
	99
	100	return err;
	101	}
	102
	103	void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num)
	104	{
	105	int i;
	106
	107	for (i = 0; i < num; i++)
	108	percpu_counter_set(&counters[i], 0);
	109	}
	110
	111	void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num)
	112	{
	113	int i;
	114
	115	for (i = 0; i < num; i++)
	116	percpu_counter_destroy(&counters[i]);
	117	}
	118
	119	static int nfsd_stat_counters_init(void)
	120	{
	121	return nfsd_percpu_counters_init(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
	122	}
	123
	124	static void nfsd_stat_counters_destroy(void)
	125	{
	126	nfsd_percpu_counters_destroy(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
	127	}
	128
	129	int nfsd_stat_init(void)
	130	{
	131	int err;
	132
	133	err = nfsd_stat_counters_init();
	134	if (err)
	135	return err;
	136
97a32539	137	svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_ops);
e567b98c AG	138
e567b98c AG	139	return 0;
1da177e4 LT	140	}
1da177e4 LT	141
e567b98c	142	void nfsd_stat_shutdown(void)
1da177e4	143	{
e567b98c	144	nfsd_stat_counters_destroy();
246590f5	145	svc_proc_unregister(&init_net, "nfsd");
1da177e4	146	}