ralnd_modparams.c

非常经典的一个分布式系统

/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 * Copyright (C) 2004 Cluster File Systems, Inc.
 *   Author: Eric Barton <[e-mail]>
 *
 *   This file is part of Lustre, http://www.lustre.org.
 *
 *   Lustre is free software; you can redistribute it and/or
 *   modify it under the terms of version 2 of the GNU General Public
 *   License as published by the Free Software Foundation.
 *
 *   Lustre is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with Lustre; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include "ralnd.h"

static int n_connd = 4;
CFS_MODULE_PARM(n_connd, "i", int, 0444,
                "# of connection daemons");

static int min_reconnect_interval = 1;
CFS_MODULE_PARM(min_reconnect_interval, "i", int, 0644,
                "minimum connection retry interval (seconds)");

static int max_reconnect_interval = 60;
CFS_MODULE_PARM(max_reconnect_interval, "i", int, 0644,
                "maximum connection retry interval (seconds)");

static int ntx = 256;
CFS_MODULE_PARM(ntx, "i", int, 0444,
                "# of transmit descriptors");

static int credits = 128;
CFS_MODULE_PARM(credits, "i", int, 0444,
                "# concurrent sends");

static int peer_credits = 32;
CFS_MODULE_PARM(peer_credits, "i", int, 0444,
                "# concurrent sends to 1 peer");

static int fma_cq_size = 8192;
CFS_MODULE_PARM(fma_cq_size, "i", int, 0444,
                "size of the completion queue");

static int timeout = 30;
CFS_MODULE_PARM(timeout, "i", int, 0644,
                "communications timeout (seconds)");

static int max_immediate = (2<<10);
CFS_MODULE_PARM(max_immediate, "i", int, 0644,
                "immediate/RDMA breakpoint");

kra_tunables_t kranal_tunables = {
        .kra_n_connd                = &n_connd,
        .kra_min_reconnect_interval = &min_reconnect_interval,
        .kra_max_reconnect_interval = &max_reconnect_interval,
        .kra_ntx                    = &ntx,
        .kra_credits                = &credits,
        .kra_peercredits            = &peer_credits,
        .kra_fma_cq_size            = &fma_cq_size,
        .kra_timeout                = &timeout,
        .kra_max_immediate          = &max_immediate,
};

#if CONFIG_SYSCTL && !CFS_SYSFS_MODULE_PARM
static cfs_sysctl_table_t kranal_ctl_table[] = {
        {
                .ctl_name = 1,
                .procname = "n_connd",
                .data     = &n_connd,
                .maxlen   = sizeof(int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 2,
                .procname = "min_reconnect_interval",
                .data     = &min_reconnect_interval,
                .maxlen   = sizeof(int),
                .mode     = 0644,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 3,
                .procname = "max_reconnect_interval",
                .data     = &max_reconnect_interval,
                .maxlen   = sizeof(int),
                .mode     = 0644,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 4,
                .procname = "ntx",
                .data     = &ntx,
                .maxlen   = sizeof(int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 5,
                .procname = "credits",
                .data     = &credits,
                .maxlen   = sizeof(int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 6,
                .procname = "peer_credits",
                .data     = &peer_credits,
                .maxlen   = sizeof(int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 7,
                .procname = "fma_cq_size",
                .data     = &fma_cq_size,
                .maxlen   = sizeof(int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 8,
                .procname = "timeout",
                .data     = &timeout,
                .maxlen   = sizeof(int),
                .mode     = 0644,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 9,
                .procname = "max_immediate",
                .data     = &max_immediate,
                .maxlen   = sizeof(int),
                .mode     = 0644,
                .proc_handler = &proc_dointvec
        },
        {0}
};

static cfs_sysctl_table_t kranal_top_ctl_table[] = {
        {
                .ctl_name = 202,
                .procname = "ranal",
                .data     = NULL,
                .maxlen   = 0,
                .mode     = 0555,
                .child    = kranal_ctl_table
        },
        {0}
};

int
kranal_tunables_init ()
{
        kranal_tunables.kra_sysctl =
                cfs_register_sysctl_table(kranal_top_ctl_table, 0);

        if (kranal_tunables.kra_sysctl == NULL)
                CWARN("Can't setup /proc tunables\n");

        return 0;
}

void
kranal_tunables_fini ()
{
        if (kranal_tunables.kra_sysctl != NULL)
                cfs_unregister_sysctl_table(kranal_tunables.kra_sysctl);
}

#else

int
kranal_tunables_init ()
{
        return 0;
}

void
kranal_tunables_fini ()
{
}

#endif