src/usr/ifmgmt.c

	ifmgmt.c revision a734c64bff58bda2fa48c2795453e092167b0ff7
/*
 * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

FILE_LICENCE ( GPL2_OR_LATER );

#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <ipxe/console.h>
#include <ipxe/netdevice.h>
#include <ipxe/device.h>
#include <ipxe/process.h>
#include <ipxe/keys.h>
#include <usr/ifmgmt.h>

/** @file
 *
 * Network interface management
 *
 */

/**
 * Open network device
 *
 * @v netdev        Network device
 * @ret rc      Return status code
 */
int ifopen ( struct net_device *netdev ) {
    int rc;

    if ( ( rc = netdev_open ( netdev ) ) != 0 ) {
        printf ( "Could not open %s: %s\n",
             netdev->name, strerror ( rc ) );
        return rc;
    }

    return 0;
}

/**
 * Close network device
 *
 * @v netdev        Network device
 */
void ifclose ( struct net_device *netdev ) {
    netdev_close ( netdev );
}

/**
 * Print network device error breakdown
 *
 * @v stats     Network device statistics
 * @v prefix        Message prefix
 */
static void ifstat_errors ( struct net_device_stats *stats,
                const char *prefix ) {
    unsigned int i;

    for ( i = 0 ; i < ( sizeof ( stats->errors ) /
                sizeof ( stats->errors[0] ) ) ; i++ ) {
        if ( stats->errors[i].count )
            printf ( "  [%s: %d x \"%s\"]\n", prefix,
                 stats->errors[i].count,
                 strerror ( stats->errors[i].rc ) );
    }
}

/**
 * Print status of network device
 *
 * @v netdev        Network device
 */
void ifstat ( struct net_device *netdev ) {
    printf ( "%s: %s using %s on %s (%s)\n"
         "  [Link:%s, TX:%d TXE:%d RX:%d RXE:%d]\n",
         netdev->name, netdev_addr ( netdev ),
         netdev->dev->driver_name, netdev->dev->name,
         ( netdev_is_open ( netdev ) ? "open" : "closed" ),
         ( netdev_link_ok ( netdev ) ? "up" : "down" ),
         netdev->tx_stats.good, netdev->tx_stats.bad,
         netdev->rx_stats.good, netdev->rx_stats.bad );
    if ( ! netdev_link_ok ( netdev ) ) {
        printf ( "  [Link status: %s]\n",
             strerror ( netdev->link_rc ) );
    }
    ifstat_errors ( &netdev->tx_stats, "TXE" );
    ifstat_errors ( &netdev->rx_stats, "RXE" );
}

/**
 * Wait for link-up, with status indication
 *
 * @v netdev        Network device
 * @v max_wait_ms   Maximum time to wait, in ms
 */
int iflinkwait ( struct net_device *netdev, unsigned int max_wait_ms ) {
    int key;
    int rc;

    /* Allow link state to be updated */
    netdev_poll ( netdev );

    if ( netdev_link_ok ( netdev ) )
        return 0;

    printf ( "Waiting for link-up on %s...", netdev->name );

    while ( 1 ) {
        if ( netdev_link_ok ( netdev ) ) {
            rc = 0;
            break;
        }
        if ( max_wait_ms-- == 0 ) {
            rc = netdev->link_rc;
            break;
        }
        step();
        if ( iskey() ) {
            key = getchar();
            if ( key == CTRL_C ) {
                rc = -ECANCELED;
                break;
            }
        }
        mdelay ( 1 );
    }

    if ( rc == 0 ) {
        printf ( " ok\n" );
    } else {
        printf ( " failed: %s\n", strerror ( rc ) );
    }

    return rc;
}