1a8c879a7SAndy Grover /*
2a8c879a7SAndy Grover * Copyright (c) 2006 Oracle. All rights reserved.
3a8c879a7SAndy Grover *
4a8c879a7SAndy Grover * This software is available to you under a choice of one of two
5a8c879a7SAndy Grover * licenses. You may choose to be licensed under the terms of the GNU
6a8c879a7SAndy Grover * General Public License (GPL) Version 2, available from the file
7a8c879a7SAndy Grover * COPYING in the main directory of this source tree, or the
8a8c879a7SAndy Grover * OpenIB.org BSD license below:
9a8c879a7SAndy Grover *
10a8c879a7SAndy Grover * Redistribution and use in source and binary forms, with or
11a8c879a7SAndy Grover * without modification, are permitted provided that the following
12a8c879a7SAndy Grover * conditions are met:
13a8c879a7SAndy Grover *
14a8c879a7SAndy Grover * - Redistributions of source code must retain the above
15a8c879a7SAndy Grover * copyright notice, this list of conditions and the following
16a8c879a7SAndy Grover * disclaimer.
17a8c879a7SAndy Grover *
18a8c879a7SAndy Grover * - Redistributions in binary form must reproduce the above
19a8c879a7SAndy Grover * copyright notice, this list of conditions and the following
20a8c879a7SAndy Grover * disclaimer in the documentation and/or other materials
21a8c879a7SAndy Grover * provided with the distribution.
22a8c879a7SAndy Grover *
23a8c879a7SAndy Grover * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24a8c879a7SAndy Grover * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25a8c879a7SAndy Grover * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26a8c879a7SAndy Grover * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27a8c879a7SAndy Grover * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28a8c879a7SAndy Grover * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29a8c879a7SAndy Grover * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30a8c879a7SAndy Grover * SOFTWARE.
31a8c879a7SAndy Grover *
32a8c879a7SAndy Grover */
33a8c879a7SAndy Grover #include <linux/percpu.h>
34a8c879a7SAndy Grover #include <linux/seq_file.h>
35a8c879a7SAndy Grover #include <linux/proc_fs.h>
36bc3b2d7fSPaul Gortmaker #include <linux/export.h>
37a8c879a7SAndy Grover
38a8c879a7SAndy Grover #include "rds.h"
39a8c879a7SAndy Grover
40a8c879a7SAndy Grover DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats);
41616b757aSAndy Grover EXPORT_PER_CPU_SYMBOL_GPL(rds_stats);
42a8c879a7SAndy Grover
43a8c879a7SAndy Grover /* :.,$s/unsigned long\>.*\<s_\(.*\);/"\1",/g */
44a8c879a7SAndy Grover
4536cbd3dcSJan Engelhardt static const char *const rds_stat_names[] = {
46a8c879a7SAndy Grover "conn_reset",
47a8c879a7SAndy Grover "recv_drop_bad_checksum",
48a8c879a7SAndy Grover "recv_drop_old_seq",
49a8c879a7SAndy Grover "recv_drop_no_sock",
50a8c879a7SAndy Grover "recv_drop_dead_sock",
51a8c879a7SAndy Grover "recv_deliver_raced",
52a8c879a7SAndy Grover "recv_delivered",
53a8c879a7SAndy Grover "recv_queued",
54a8c879a7SAndy Grover "recv_immediate_retry",
55a8c879a7SAndy Grover "recv_delayed_retry",
56a8c879a7SAndy Grover "recv_ack_required",
57a8c879a7SAndy Grover "recv_rdma_bytes",
58a8c879a7SAndy Grover "recv_ping",
59a8c879a7SAndy Grover "send_queue_empty",
60a8c879a7SAndy Grover "send_queue_full",
61049ee3f5SAndy Grover "send_lock_contention",
62049ee3f5SAndy Grover "send_lock_queue_raced",
63a8c879a7SAndy Grover "send_immediate_retry",
64a8c879a7SAndy Grover "send_delayed_retry",
65a8c879a7SAndy Grover "send_drop_acked",
66a8c879a7SAndy Grover "send_ack_required",
67a8c879a7SAndy Grover "send_queued",
68a8c879a7SAndy Grover "send_rdma",
69a8c879a7SAndy Grover "send_rdma_bytes",
70a8c879a7SAndy Grover "send_pong",
71a8c879a7SAndy Grover "page_remainder_hit",
72a8c879a7SAndy Grover "page_remainder_miss",
73a8c879a7SAndy Grover "copy_to_user",
74a8c879a7SAndy Grover "copy_from_user",
75a8c879a7SAndy Grover "cong_update_queued",
76a8c879a7SAndy Grover "cong_update_received",
77a8c879a7SAndy Grover "cong_send_error",
78a8c879a7SAndy Grover "cong_send_blocked",
7955c70ca0SGerd Rausch "recv_bytes_added_to_sock",
8055c70ca0SGerd Rausch "recv_bytes_freed_fromsock",
81*11740ef4SAndy Grover "send_stuck_rm",
82a8c879a7SAndy Grover };
83a8c879a7SAndy Grover
rds_stats_info_copy(struct rds_info_iterator * iter,uint64_t * values,const char * const * names,size_t nr)84a8c879a7SAndy Grover void rds_stats_info_copy(struct rds_info_iterator *iter,
8536cbd3dcSJan Engelhardt uint64_t *values, const char *const *names, size_t nr)
86a8c879a7SAndy Grover {
87a8c879a7SAndy Grover struct rds_info_counter ctr;
88a8c879a7SAndy Grover size_t i;
89a8c879a7SAndy Grover
90a8c879a7SAndy Grover for (i = 0; i < nr; i++) {
91a8c879a7SAndy Grover BUG_ON(strlen(names[i]) >= sizeof(ctr.name));
92a8c879a7SAndy Grover strncpy(ctr.name, names[i], sizeof(ctr.name) - 1);
932e85d676SChen Gang ctr.name[sizeof(ctr.name) - 1] = '\0';
94a8c879a7SAndy Grover ctr.value = values[i];
95a8c879a7SAndy Grover
96a8c879a7SAndy Grover rds_info_copy(iter, &ctr, sizeof(ctr));
97a8c879a7SAndy Grover }
98a8c879a7SAndy Grover }
99616b757aSAndy Grover EXPORT_SYMBOL_GPL(rds_stats_info_copy);
100a8c879a7SAndy Grover
101a8c879a7SAndy Grover /*
102a8c879a7SAndy Grover * This gives global counters across all the transports. The strings
103a8c879a7SAndy Grover * are copied in so that the tool doesn't need knowledge of the specific
104a8c879a7SAndy Grover * stats that we're exporting. Some are pretty implementation dependent
105a8c879a7SAndy Grover * and may change over time. That doesn't stop them from being useful.
106a8c879a7SAndy Grover *
107a8c879a7SAndy Grover * This is the only function in the chain that knows about the byte granular
108a8c879a7SAndy Grover * length in userspace. It converts it to number of stat entries that the
109a8c879a7SAndy Grover * rest of the functions operate in.
110a8c879a7SAndy Grover */
rds_stats_info(struct socket * sock,unsigned int len,struct rds_info_iterator * iter,struct rds_info_lengths * lens)111a8c879a7SAndy Grover static void rds_stats_info(struct socket *sock, unsigned int len,
112a8c879a7SAndy Grover struct rds_info_iterator *iter,
113a8c879a7SAndy Grover struct rds_info_lengths *lens)
114a8c879a7SAndy Grover {
115a8c879a7SAndy Grover struct rds_statistics stats = {0, };
116a8c879a7SAndy Grover uint64_t *src;
117a8c879a7SAndy Grover uint64_t *sum;
118a8c879a7SAndy Grover size_t i;
119a8c879a7SAndy Grover int cpu;
120a8c879a7SAndy Grover unsigned int avail;
121a8c879a7SAndy Grover
122a8c879a7SAndy Grover avail = len / sizeof(struct rds_info_counter);
123a8c879a7SAndy Grover
124a8c879a7SAndy Grover if (avail < ARRAY_SIZE(rds_stat_names)) {
125a8c879a7SAndy Grover avail = 0;
126a8c879a7SAndy Grover goto trans;
127a8c879a7SAndy Grover }
128a8c879a7SAndy Grover
129a8c879a7SAndy Grover for_each_online_cpu(cpu) {
130a8c879a7SAndy Grover src = (uint64_t *)&(per_cpu(rds_stats, cpu));
131a8c879a7SAndy Grover sum = (uint64_t *)&stats;
132a8c879a7SAndy Grover for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
133a8c879a7SAndy Grover *(sum++) += *(src++);
134a8c879a7SAndy Grover }
135a8c879a7SAndy Grover
136a8c879a7SAndy Grover rds_stats_info_copy(iter, (uint64_t *)&stats, rds_stat_names,
137a8c879a7SAndy Grover ARRAY_SIZE(rds_stat_names));
138a8c879a7SAndy Grover avail -= ARRAY_SIZE(rds_stat_names);
139a8c879a7SAndy Grover
140a8c879a7SAndy Grover trans:
141a8c879a7SAndy Grover lens->each = sizeof(struct rds_info_counter);
142a8c879a7SAndy Grover lens->nr = rds_trans_stats_info_copy(iter, avail) +
143a8c879a7SAndy Grover ARRAY_SIZE(rds_stat_names);
144a8c879a7SAndy Grover }
145a8c879a7SAndy Grover
rds_stats_exit(void)146a8c879a7SAndy Grover void rds_stats_exit(void)
147a8c879a7SAndy Grover {
148a8c879a7SAndy Grover rds_info_deregister_func(RDS_INFO_COUNTERS, rds_stats_info);
149a8c879a7SAndy Grover }
150a8c879a7SAndy Grover
rds_stats_init(void)151ef87b7eaSZach Brown int rds_stats_init(void)
152a8c879a7SAndy Grover {
153a8c879a7SAndy Grover rds_info_register_func(RDS_INFO_COUNTERS, rds_stats_info);
154a8c879a7SAndy Grover return 0;
155a8c879a7SAndy Grover }
156