1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (c) 2006 Oracle. All rights reserved.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * This software is available to you under a choice of one of two
5*4882a593Smuzhiyun * licenses. You may choose to be licensed under the terms of the GNU
6*4882a593Smuzhiyun * General Public License (GPL) Version 2, available from the file
7*4882a593Smuzhiyun * COPYING in the main directory of this source tree, or the
8*4882a593Smuzhiyun * OpenIB.org BSD license below:
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun * Redistribution and use in source and binary forms, with or
11*4882a593Smuzhiyun * without modification, are permitted provided that the following
12*4882a593Smuzhiyun * conditions are met:
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * - Redistributions of source code must retain the above
15*4882a593Smuzhiyun * copyright notice, this list of conditions and the following
16*4882a593Smuzhiyun * disclaimer.
17*4882a593Smuzhiyun *
18*4882a593Smuzhiyun * - Redistributions in binary form must reproduce the above
19*4882a593Smuzhiyun * copyright notice, this list of conditions and the following
20*4882a593Smuzhiyun * disclaimer in the documentation and/or other materials
21*4882a593Smuzhiyun * provided with the distribution.
22*4882a593Smuzhiyun *
23*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24*4882a593Smuzhiyun * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25*4882a593Smuzhiyun * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26*4882a593Smuzhiyun * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27*4882a593Smuzhiyun * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28*4882a593Smuzhiyun * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29*4882a593Smuzhiyun * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30*4882a593Smuzhiyun * SOFTWARE.
31*4882a593Smuzhiyun *
32*4882a593Smuzhiyun */
33*4882a593Smuzhiyun #include <linux/percpu.h>
34*4882a593Smuzhiyun #include <linux/seq_file.h>
35*4882a593Smuzhiyun #include <linux/proc_fs.h>
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun #include "rds.h"
38*4882a593Smuzhiyun #include "tcp.h"
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun DEFINE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats)
41*4882a593Smuzhiyun ____cacheline_aligned;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun static const char * const rds_tcp_stat_names[] = {
44*4882a593Smuzhiyun "tcp_data_ready_calls",
45*4882a593Smuzhiyun "tcp_write_space_calls",
46*4882a593Smuzhiyun "tcp_sndbuf_full",
47*4882a593Smuzhiyun "tcp_connect_raced",
48*4882a593Smuzhiyun "tcp_listen_closed_stale",
49*4882a593Smuzhiyun };
50*4882a593Smuzhiyun
rds_tcp_stats_info_copy(struct rds_info_iterator * iter,unsigned int avail)51*4882a593Smuzhiyun unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
52*4882a593Smuzhiyun unsigned int avail)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun struct rds_tcp_statistics stats = {0, };
55*4882a593Smuzhiyun uint64_t *src;
56*4882a593Smuzhiyun uint64_t *sum;
57*4882a593Smuzhiyun size_t i;
58*4882a593Smuzhiyun int cpu;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun if (avail < ARRAY_SIZE(rds_tcp_stat_names))
61*4882a593Smuzhiyun goto out;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun for_each_online_cpu(cpu) {
64*4882a593Smuzhiyun src = (uint64_t *)&(per_cpu(rds_tcp_stats, cpu));
65*4882a593Smuzhiyun sum = (uint64_t *)&stats;
66*4882a593Smuzhiyun for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
67*4882a593Smuzhiyun *(sum++) += *(src++);
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun rds_stats_info_copy(iter, (uint64_t *)&stats, rds_tcp_stat_names,
71*4882a593Smuzhiyun ARRAY_SIZE(rds_tcp_stat_names));
72*4882a593Smuzhiyun out:
73*4882a593Smuzhiyun return ARRAY_SIZE(rds_tcp_stat_names);
74*4882a593Smuzhiyun }
75