/* * 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",	"mprds_catchup_tx0_retries",}; 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));		strscpy_pad(ctr.name, names[i]);		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;}