/* * 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 = RDS_IB_DEFAULT_SEND_WR;unsigned long rds_ib_sysctl_max_recv_wr = RDS_IB_DEFAULT_RECV_WR;unsigned long rds_ib_sysctl_max_recv_allocation = (128 * 1024 * 1024) / RDS_FRAG_SIZE;static unsigned long rds_ib_sysctl_max_wr_min = 1;/* hardware will fail CQ creation long before this */static unsigned long rds_ib_sysctl_max_wr_max = (u32)~0; unsigned long rds_ib_sysctl_max_unsig_wrs = 16;static unsigned long rds_ib_sysctl_max_unsig_wr_min = 1;static unsigned long rds_ib_sysctl_max_unsig_wr_max = 64; /* * 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 = 0; static struct ctl_table rds_ib_sysctl_table[] = {	{		.procname       = "max_send_wr",		.data		= &rds_ib_sysctl_max_send_wr,		.maxlen         = sizeof(unsigned long),		.mode           = 0644,		.proc_handler   = proc_doulongvec_minmax,		.extra1		= &rds_ib_sysctl_max_wr_min,		.extra2		= &rds_ib_sysctl_max_wr_max,	},	{		.procname       = "max_recv_wr",		.data		= &rds_ib_sysctl_max_recv_wr,		.maxlen         = sizeof(unsigned long),		.mode           = 0644,		.proc_handler   = proc_doulongvec_minmax,		.extra1		= &rds_ib_sysctl_max_wr_min,		.extra2		= &rds_ib_sysctl_max_wr_max,	},	{		.procname       = "max_unsignaled_wr",		.data		= &rds_ib_sysctl_max_unsig_wrs,		.maxlen         = sizeof(unsigned long),		.mode           = 0644,		.proc_handler   = proc_doulongvec_minmax,		.extra1		= &rds_ib_sysctl_max_unsig_wr_min,		.extra2		= &rds_ib_sysctl_max_unsig_wr_max,	},	{		.procname       = "max_recv_allocation",		.data		= &rds_ib_sysctl_max_recv_allocation,		.maxlen         = sizeof(unsigned long),		.mode           = 0644,		.proc_handler   = proc_doulongvec_minmax,	},	{		.procname	= "flow_control",		.data		= &rds_ib_sysctl_flow_control,		.maxlen		= sizeof(rds_ib_sysctl_flow_control),		.mode		= 0644,		.proc_handler	= proc_dointvec,	},}; void rds_ib_sysctl_exit(void){	if (rds_ib_sysctl_hdr)		unregister_net_sysctl_table(rds_ib_sysctl_hdr);} int rds_ib_sysctl_init(void){	rds_ib_sysctl_hdr = register_net_sysctl(&init_net, "net/rds/ib", rds_ib_sysctl_table);	if (!rds_ib_sysctl_hdr)		return -ENOMEM;	return 0;}