iw_sysctl.c

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/*
 * 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 "iw.h"

static struct ctl_table_header *rds_iw_sysctl_hdr;

unsigned long rds_iw_sysctl_max_send_wr = RDS_IW_DEFAULT_SEND_WR;
unsigned long rds_iw_sysctl_max_recv_wr = RDS_IW_DEFAULT_RECV_WR;
unsigned long rds_iw_sysctl_max_recv_allocation = (128 * 1024 * 1024) / RDS_FRAG_SIZE;
static unsigned long rds_iw_sysctl_max_wr_min = 1;
/* hardware will fail CQ creation long before this */
static unsigned long rds_iw_sysctl_max_wr_max = (u32)~0;

unsigned long rds_iw_sysctl_max_unsig_wrs = 16;
static unsigned long rds_iw_sysctl_max_unsig_wr_min = 1;
static unsigned long rds_iw_sysctl_max_unsig_wr_max = 64;

unsigned long rds_iw_sysctl_max_unsig_bytes = (16 << 20);
static unsigned long rds_iw_sysctl_max_unsig_bytes_min = 1;
static unsigned long rds_iw_sysctl_max_unsig_bytes_max = ~0UL;

unsigned int rds_iw_sysctl_flow_control = 1;

static ctl_table rds_iw_sysctl_table[] = {
    {
        .procname       = "max_send_wr",
        .data       = &rds_iw_sysctl_max_send_wr,
        .maxlen         = sizeof(unsigned long),
        .mode           = 0644,
        .proc_handler   = proc_doulongvec_minmax,
        .extra1     = &rds_iw_sysctl_max_wr_min,
        .extra2     = &rds_iw_sysctl_max_wr_max,
    },
    {
        .procname       = "max_recv_wr",
        .data       = &rds_iw_sysctl_max_recv_wr,
        .maxlen         = sizeof(unsigned long),
        .mode           = 0644,
        .proc_handler   = proc_doulongvec_minmax,
        .extra1     = &rds_iw_sysctl_max_wr_min,
        .extra2     = &rds_iw_sysctl_max_wr_max,
    },
    {
        .procname       = "max_unsignaled_wr",
        .data       = &rds_iw_sysctl_max_unsig_wrs,
        .maxlen         = sizeof(unsigned long),
        .mode           = 0644,
        .proc_handler   = proc_doulongvec_minmax,
        .extra1     = &rds_iw_sysctl_max_unsig_wr_min,
        .extra2     = &rds_iw_sysctl_max_unsig_wr_max,
    },
    {
        .procname       = "max_unsignaled_bytes",
        .data       = &rds_iw_sysctl_max_unsig_bytes,
        .maxlen         = sizeof(unsigned long),
        .mode           = 0644,
        .proc_handler   = proc_doulongvec_minmax,
        .extra1     = &rds_iw_sysctl_max_unsig_bytes_min,
        .extra2     = &rds_iw_sysctl_max_unsig_bytes_max,
    },
    {
        .procname       = "max_recv_allocation",
        .data       = &rds_iw_sysctl_max_recv_allocation,
        .maxlen         = sizeof(unsigned long),
        .mode           = 0644,
        .proc_handler   = proc_doulongvec_minmax,
    },
    {
        .procname   = "flow_control",
        .data       = &rds_iw_sysctl_flow_control,
        .maxlen     = sizeof(rds_iw_sysctl_flow_control),
        .mode       = 0644,
        .proc_handler   = proc_dointvec,
    },
    { }
};

void rds_iw_sysctl_exit(void)
{
    if (rds_iw_sysctl_hdr)
        unregister_net_sysctl_table(rds_iw_sysctl_hdr);
}

int rds_iw_sysctl_init(void)
{
    rds_iw_sysctl_hdr = register_net_sysctl(&init_net, "net/rds/iw", rds_iw_sysctl_table);
    if (!rds_iw_sysctl_hdr)
        return -ENOMEM;
    return 0;
}