cregit-Linux how code gets into the kernel

Release 4.15 net/rds/ib_sysctl.c

Directory: net/rds
/*
 * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Grover1593.75%150.00%
Eric W. Biedermann16.25%150.00%
Total16100.00%2100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Andy Grover2683.87%250.00%
Eric W. Biedermann516.13%250.00%
Total31100.00%4100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Andy Grover33497.38%337.50%
Eric W. Biedermann72.04%337.50%
Joe Perches10.29%112.50%
Stephen Hemminger10.29%112.50%
Total343100.00%8100.00%
Directory: net/rds
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