linux/net/rds/ib_sysctl.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/kernel.h>
#include <linux/sysctl.h>
#include <linux/proc_fs.h>

#include "ib.h"

static struct ctl_table_header *rds_ib_sysctl_hdr;

unsigned long rds_ib_sysctl_max_send_wr = …;
unsigned long rds_ib_sysctl_max_recv_wr = …;
unsigned long rds_ib_sysctl_max_recv_allocation = …;
static unsigned long rds_ib_sysctl_max_wr_min = …;
/* hardware will fail CQ creation long before this */
static unsigned long rds_ib_sysctl_max_wr_max = …;

unsigned long rds_ib_sysctl_max_unsig_wrs = …;
static unsigned long rds_ib_sysctl_max_unsig_wr_min = …;
static unsigned long rds_ib_sysctl_max_unsig_wr_max = …;

/*
 * This sysctl does nothing.
 *
 * Backwards compatibility with RDS 3.0 wire protocol
 * disables initial FC credit exchange.
 * If it's ever possible to drop 3.0 support,
 * setting this to 1 and moving init/refill of send/recv
 * rings from ib_cm_connect_complete() back into ib_setup_qp()
 * will cause credits to be added before protocol negotiation.
 */
unsigned int rds_ib_sysctl_flow_control = …;

static struct ctl_table rds_ib_sysctl_table[] = …;

void rds_ib_sysctl_exit(void)
{ … }

int rds_ib_sysctl_init(void)
{ … }