156 lines
4.4 KiB
C
156 lines
4.4 KiB
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 <linux/export.h>
|
|
|
|
#include "rds.h"
|
|
|
|
DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_statistics, rds_stats);
|
|
EXPORT_PER_CPU_SYMBOL_GPL(rds_stats);
|
|
|
|
/* :.,$s/unsigned long\>.*\<s_\(.*\);/"\1",/g */
|
|
|
|
static const char *const 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_lock_contention",
|
|
"send_lock_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",
|
|
"recv_bytes_added_to_sock",
|
|
"recv_bytes_freed_fromsock",
|
|
"send_stuck_rm",
|
|
};
|
|
|
|
void rds_stats_info_copy(struct rds_info_iterator *iter,
|
|
uint64_t *values, const char *const *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.name[sizeof(ctr.name) - 1] = '\0';
|
|
ctr.value = values[i];
|
|
|
|
rds_info_copy(iter, &ctr, sizeof(ctr));
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(rds_stats_info_copy);
|
|
|
|
/*
|
|
* 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 rds_stats_init(void)
|
|
{
|
|
rds_info_register_func(RDS_INFO_COUNTERS, rds_stats_info);
|
|
return 0;
|
|
}
|