src/net/netdevice.c


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/*
 * Copyright (C) 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 * You can also choose to distribute this program under the terms of
 * the Unmodified Binary Distribution Licence (as given in the file
 * COPYING.UBDL), provided that you have satisfied its requirements.
 */

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <byteswap.h>
#include <string.h>
#include <errno.h>
#include <config/general.h>
#include <ipxe/if_ether.h>
#include <ipxe/iobuf.h>
#include <ipxe/tables.h>
#include <ipxe/process.h>
#include <ipxe/init.h>
#include <ipxe/malloc.h>
#include <ipxe/device.h>
#include <ipxe/errortab.h>
#include <ipxe/profile.h>
#include <ipxe/fault.h>
#include <ipxe/vlan.h>
#include <ipxe/netdevice.h>

/** @file
 *
 * Network device management
 *
 */

/** List of network devices */
struct list_head net_devices = LIST_HEAD_INIT ( net_devices );

/** List of open network devices, in reverse order of opening */
static struct list_head open_net_devices = LIST_HEAD_INIT ( open_net_devices );

/** Network polling profiler */
static struct profiler net_poll_profiler __profiler = { .name = "net.poll" };

/** Network receive profiler */
static struct profiler net_rx_profiler __profiler = { .name = "net.rx" };

/** Network transmit profiler */
static struct profiler net_tx_profiler __profiler = { .name = "net.tx" };

/** Default unknown link status code */
#define EUNKNOWN_LINK_STATUS __einfo_error ( EINFO_EUNKNOWN_LINK_STATUS )
#define EINFO_EUNKNOWN_LINK_STATUS \
	__einfo_uniqify ( EINFO_EINPROGRESS, 0x01, "Unknown" )

/** Default not-yet-attempted-configuration status code */
#define EUNUSED_CONFIG __einfo_error ( EINFO_EUNUSED_CONFIG )
#define EINFO_EUNUSED_CONFIG \
	__einfo_uniqify ( EINFO_EINPROGRESS, 0x02, "Unused" )

/** Default configuration-in-progress status code */
#define EINPROGRESS_CONFIG __einfo_error ( EINFO_EINPROGRESS_CONFIG )
#define EINFO_EINPROGRESS_CONFIG \
	__einfo_uniqify ( EINFO_EINPROGRESS, 0x03, "Incomplete" )

/** Default link-down status code */
#define ENOTCONN_LINK_DOWN __einfo_error ( EINFO_ENOTCONN_LINK_DOWN )
#define EINFO_ENOTCONN_LINK_DOWN \
	__einfo_uniqify ( EINFO_ENOTCONN, 0x01, "Down" )

/** Human-readable message for the default link statuses */
struct errortab netdev_errors[] __errortab = {
	__einfo_errortab ( EINFO_EUNKNOWN_LINK_STATUS ),