[net-next-2.6.git] / net / rds / stats.c

/*
 * Copyright (c) 2006 Oracle.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
#include <linux/percpu.h>
#include <linux/seq_file.h>
#include <linux/proc_fs.h>

#include "rds.h"

DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats);

/* :.,$s/unsigned long\>.*\<s_\(.*\);/"\1",/g */

static char *rds_stat_names[] = {
	"conn_reset",
	"recv_drop_bad_checksum",
	"recv_drop_old_seq",
	"recv_drop_no_sock",
	"recv_drop_dead_sock",
	"recv_deliver_raced",
	"recv_delivered",
	"recv_queued",
	"recv_immediate_retry",
	"recv_delayed_retry",
	"recv_ack_required",
	"recv_rdma_bytes",
	"recv_ping",
	"send_queue_empty",
	"send_queue_full",
	"send_sem_contention",
	"send_sem_queue_raced",
	"send_immediate_retry",
	"send_delayed_retry",
	"send_drop_acked",
	"send_ack_required",
	"send_queued",
	"send_rdma",
	"send_rdma_bytes",
	"send_pong",
	"page_remainder_hit",
	"page_remainder_miss",
	"copy_to_user",
	"copy_from_user",
	"cong_update_queued",
	"cong_update_received",
	"cong_send_error",
	"cong_send_blocked",
};

void rds_stats_info_copy(struct rds_info_iterator *iter,
			 uint64_t *values, char **names, size_t nr)
{
	struct rds_info_counter ctr;
	size_t i;

	for (i = 0; i < nr; i++) {
		BUG_ON(strlen(names[i]) >= sizeof(ctr.name));
		strncpy(ctr.name, names[i], sizeof(ctr.name) - 1);
		ctr.value = values[i];

		rds_info_copy(iter, &ctr, sizeof(ctr));
	}
}

/*
 * This gives global counters across all the transports.  The strings
 * are copied in so that the tool doesn't need knowledge of the specific
 * stats that we're exporting.  Some are pretty implementation dependent
 * and may change over time.  That doesn't stop them from being useful.
 *
 * This is the only function in the chain that knows about the byte granular
 * length in userspace.  It converts it to number of stat entries that the
 * rest of the functions operate in.
 */
static void rds_stats_info(struct socket *sock, unsigned int len,
			   struct rds_info_iterator *iter,
			   struct rds_info_lengths *lens)
{
	struct rds_statistics stats = {0, };
	uint64_t *src;
	uint64_t *sum;
	size_t i;
	int cpu;
	unsigned int avail;

	avail = len / sizeof(struct rds_info_counter);

	if (avail < ARRAY_SIZE(rds_stat_names)) {
		avail = 0;
		goto trans;
	}

	for_each_online_cpu(cpu) {
		src = (uint64_t *)&(per_cpu(rds_stats, cpu));
		sum = (uint64_t *)&stats;
		for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
			*(sum++) += *(src++);
	}

	rds_stats_info_copy(iter, (uint64_t *)&stats, rds_stat_names,
			    ARRAY_SIZE(rds_stat_names));
	avail -= ARRAY_SIZE(rds_stat_names);

trans:
	lens->each = sizeof(struct rds_info_counter);
	lens->nr = rds_trans_stats_info_copy(iter, avail) +
		   ARRAY_SIZE(rds_stat_names);
}

void rds_stats_exit(void)
{
	rds_info_deregister_func(RDS_INFO_COUNTERS, rds_stats_info);
}

int __init rds_stats_init(void)
{
	rds_info_register_func(RDS_INFO_COUNTERS, rds_stats_info);
	return 0;
}
Commit	Line	Data
a8c879a7 AG	1	/*
	2	* Copyright (c) 2006 Oracle. All rights reserved.
	3	*
	4	* This software is available to you under a choice of one of two
	5	* licenses. You may choose to be licensed under the terms of the GNU
	6	* General Public License (GPL) Version 2, available from the file
	7	* COPYING in the main directory of this source tree, or the
	8	* OpenIB.org BSD license below:
	9	*
	10	* Redistribution and use in source and binary forms, with or
	11	* without modification, are permitted provided that the following
	12	* conditions are met:
	13	*
	14	* - Redistributions of source code must retain the above
	15	* copyright notice, this list of conditions and the following
	16	* disclaimer.
	17	*
	18	* - Redistributions in binary form must reproduce the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer in the documentation and/or other materials
	21	* provided with the distribution.
	22	*
	23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	27	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	28	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	29	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*
	32	*/
	33	#include <linux/percpu.h>
	34	#include <linux/seq_file.h>
	35	#include <linux/proc_fs.h>
	36
	37	#include "rds.h"
	38
	39	DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats);
	40
	41	/* :.,$s/unsigned long\>.\<s_\(.\);/"\1",/g */
	42
	43	static char *rds_stat_names[] = {
	44	"conn_reset",
	45	"recv_drop_bad_checksum",
	46	"recv_drop_old_seq",
	47	"recv_drop_no_sock",
	48	"recv_drop_dead_sock",
	49	"recv_deliver_raced",
	50	"recv_delivered",
	51	"recv_queued",
	52	"recv_immediate_retry",
	53	"recv_delayed_retry",
	54	"recv_ack_required",
	55	"recv_rdma_bytes",
	56	"recv_ping",
	57	"send_queue_empty",
	58	"send_queue_full",
	59	"send_sem_contention",
	60	"send_sem_queue_raced",
	61	"send_immediate_retry",
	62	"send_delayed_retry",
	63	"send_drop_acked",
	64	"send_ack_required",
65	"send_queued",
66	"send_rdma",
67	"send_rdma_bytes",
68	"send_pong",
69	"page_remainder_hit",
70	"page_remainder_miss",
71	"copy_to_user",
72	"copy_from_user",
73	"cong_update_queued",
74	"cong_update_received",
75	"cong_send_error",
76	"cong_send_blocked",
77	};
78
79	void rds_stats_info_copy(struct rds_info_iterator *iter,
80	uint64_t values, char *names, size_t nr)
81	{
82	struct rds_info_counter ctr;
83	size_t i;
84
85	for (i = 0; i < nr; i++) {
86	BUG_ON(strlen(names[i]) >= sizeof(ctr.name));
87	strncpy(ctr.name, names[i], sizeof(ctr.name) - 1);
88	ctr.value = values[i];
89
90	rds_info_copy(iter, &ctr, sizeof(ctr));
91	}
92	}
93
94	/*
95	* This gives global counters across all the transports. The strings
96	* are copied in so that the tool doesn't need knowledge of the specific
97	* stats that we're exporting. Some are pretty implementation dependent
98	* and may change over time. That doesn't stop them from being useful.
99	*
100	* This is the only function in the chain that knows about the byte granular
101	* length in userspace. It converts it to number of stat entries that the
102	* rest of the functions operate in.
103	*/
104	static void rds_stats_info(struct socket *sock, unsigned int len,
105	struct rds_info_iterator *iter,
106	struct rds_info_lengths *lens)
107	{
108	struct rds_statistics stats = {0, };
109	uint64_t *src;
110	uint64_t *sum;
111	size_t i;
112	int cpu;
113	unsigned int avail;
114
115	avail = len / sizeof(struct rds_info_counter);
116
117	if (avail < ARRAY_SIZE(rds_stat_names)) {
118	avail = 0;
119	goto trans;
120	}
121
122	for_each_online_cpu(cpu) {
123	src = (uint64_t *)&(per_cpu(rds_stats, cpu));
124	sum = (uint64_t *)&stats;
125	for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
126	(sum++) += (src++);
127	}
128
129	rds_stats_info_copy(iter, (uint64_t *)&stats, rds_stat_names,
130	ARRAY_SIZE(rds_stat_names));
131	avail -= ARRAY_SIZE(rds_stat_names);
132
133	trans:
134	lens->each = sizeof(struct rds_info_counter);
135	lens->nr = rds_trans_stats_info_copy(iter, avail) +
136	ARRAY_SIZE(rds_stat_names);
137	}
138
139	void rds_stats_exit(void)
140	{
141	rds_info_deregister_func(RDS_INFO_COUNTERS, rds_stats_info);
142	}
143
144	int __init rds_stats_init(void)
145	{
146	rds_info_register_func(RDS_INFO_COUNTERS, rds_stats_info);
147	return 0;
148	}