gmlnd_module.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) 2003 Los Alamos National Laboratory (LANL)
 * Copyright (C) 2005 Cluster File Systems, Inc. All rights reserved.
 *
 *   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 "gmlnd.h"


static int port = 4;
CFS_MODULE_PARM(port, "i", int, 0444,
                "GM port to use for communications");

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

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

static int peer_credits = 8;
CFS_MODULE_PARM(peer_credits, "i", int, 0444,
                "# concurrent sends per peer");

static int nlarge_tx_bufs = 32;
CFS_MODULE_PARM(nlarge_tx_bufs, "i", int, 0444,
                "# large tx message buffers");

static int nrx_small = 128;
CFS_MODULE_PARM(nrx_small, "i", int, 0444,
                "# small rx message buffers");

static int nrx_large = 64;
CFS_MODULE_PARM(nrx_large, "i", int, 0444,
                "# large rx message buffers");

gmnal_tunables_t gmnal_tunables = {
        .gm_port            = &port,
        .gm_ntx             = &ntx,
        .gm_credits         = &credits,
        .gm_peer_credits    = &peer_credits,
        .gm_nlarge_tx_bufs  = &nlarge_tx_bufs,
        .gm_nrx_small       = &nrx_small,
        .gm_nrx_large       = &nrx_large,
};

#if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
static cfs_sysctl_table_t gmnal_ctl_table[] = {
        {
                .ctl_name = 1,
                .procname = "port",
                .data     = &port,
                .maxlen   = sizeof (int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 2,
                .procname = "ntx",
                .data     = &ntx,
                .maxlen   = sizeof (int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 3,
                .procname = "credits",
                .data     = &credits,
                .maxlen   = sizeof (int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 4,
                .procname = "peer_credits",
                .data     = &peer_credits,
                .maxlen   = sizeof (int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 5,
                .procname = "nlarge_tx_bufs",
                .data     = &nlarge_tx_bufs,
                .maxlen   = sizeof (int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 6,
                .procname = "nrx_small",
                .data     = &nrx_small,
                .maxlen   = sizeof (int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {
                .ctl_name = 7,
                .procname = "nrx_large",
                .data     = &nrx_large,
                .maxlen   = sizeof (int),
                .mode     = 0444,
                .proc_handler = &proc_dointvec
        },
        {0}
};

static cfs_sysctl_table_t gmnal_top_ctl_table[] = {
        {
                .ctl_name = 207,
                .procname = "gmnal",
                .data     = NULL,
                .maxlen   = 0,
                .mode     = 0555,
                .child    = gmnal_ctl_table
        },
        {0}
};
#endif

static int __init
gmnal_load(void)
{
        int     status;
        CDEBUG(D_TRACE, "This is the gmnal module initialisation routine\n");

#if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
        gmnal_tunables.gm_sysctl =
                cfs_register_sysctl_table(gmnal_top_ctl_table, 0);

        if (gmnal_tunables.gm_sysctl == NULL)
                CWARN("Can't setup /proc tunables\n");
#endif
        CDEBUG(D_NET, "Calling gmnal_init\n");
        status = gmnal_init();
        if (status == 0) {
                CDEBUG(D_NET, "Portals GMNAL initialised ok\n");
        } else {
                CDEBUG(D_NET, "Portals GMNAL Failed to initialise\n");
                return(-ENODEV);
        }

        CDEBUG(D_NET, "This is the end of the gmnal init routine");

        return(0);
}

static void __exit
gmnal_unload(void)
{
        gmnal_fini();
#if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
        if (gmnal_tunables.gm_sysctl != NULL)
                cfs_unregister_sysctl_table(gmnal_tunables.gm_sysctl);
#endif
}

module_init(gmnal_load);
module_exit(gmnal_unload);

MODULE_AUTHOR("Cluster File Systems, Inc. <[e-mail]>");
MODULE_DESCRIPTION("Kernel GM LND v1.01");
MODULE_LICENSE("GPL");