2 * Copyright (c) 2006 Oracle. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
33 #include <linux/percpu.h>
34 #include <linux/seq_file.h>
35 #include <linux/proc_fs.h>
39 DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_statistics
, rds_stats
);
40 EXPORT_PER_CPU_SYMBOL_GPL(rds_stats
);
42 /* :.,$s/unsigned long\>.*\<s_\(.*\);/"\1",/g */
44 static const char *const rds_stat_names
[] = {
46 "recv_drop_bad_checksum",
49 "recv_drop_dead_sock",
53 "recv_immediate_retry",
60 "send_sem_contention",
61 "send_sem_queue_raced",
62 "send_immediate_retry",
71 "page_remainder_miss",
75 "cong_update_received",
82 void rds_stats_info_copy(struct rds_info_iterator
*iter
,
83 uint64_t *values
, const char *const *names
, size_t nr
)
85 struct rds_info_counter ctr
;
88 for (i
= 0; i
< nr
; i
++) {
89 BUG_ON(strlen(names
[i
]) >= sizeof(ctr
.name
));
90 strncpy(ctr
.name
, names
[i
], sizeof(ctr
.name
) - 1);
91 ctr
.value
= values
[i
];
93 rds_info_copy(iter
, &ctr
, sizeof(ctr
));
96 EXPORT_SYMBOL_GPL(rds_stats_info_copy
);
99 * This gives global counters across all the transports. The strings
100 * are copied in so that the tool doesn't need knowledge of the specific
101 * stats that we're exporting. Some are pretty implementation dependent
102 * and may change over time. That doesn't stop them from being useful.
104 * This is the only function in the chain that knows about the byte granular
105 * length in userspace. It converts it to number of stat entries that the
106 * rest of the functions operate in.
108 static void rds_stats_info(struct socket
*sock
, unsigned int len
,
109 struct rds_info_iterator
*iter
,
110 struct rds_info_lengths
*lens
)
112 struct rds_statistics stats
= {0, };
119 avail
= len
/ sizeof(struct rds_info_counter
);
121 if (avail
< ARRAY_SIZE(rds_stat_names
)) {
126 for_each_online_cpu(cpu
) {
127 src
= (uint64_t *)&(per_cpu(rds_stats
, cpu
));
128 sum
= (uint64_t *)&stats
;
129 for (i
= 0; i
< sizeof(stats
) / sizeof(uint64_t); i
++)
130 *(sum
++) += *(src
++);
133 rds_stats_info_copy(iter
, (uint64_t *)&stats
, rds_stat_names
,
134 ARRAY_SIZE(rds_stat_names
));
135 avail
-= ARRAY_SIZE(rds_stat_names
);
138 lens
->each
= sizeof(struct rds_info_counter
);
139 lens
->nr
= rds_trans_stats_info_copy(iter
, avail
) +
140 ARRAY_SIZE(rds_stat_names
);
143 void rds_stats_exit(void)
145 rds_info_deregister_func(RDS_INFO_COUNTERS
, rds_stats_info
);
148 int __init
rds_stats_init(void)
150 rds_info_register_func(RDS_INFO_COUNTERS
, rds_stats_info
);