1ba959c6b3
Add ability for network devices to flag link up/down state to the networking core. Autobooting code will now wait for link-up before attempting DHCP. IPoIB reflects the Infiniband link state as the network device link state (which is not strictly correct; we also need a succesful IPoIB IPv4 broadcast group join), but is probably more informative.
216 lines
4.9 KiB
C
216 lines
4.9 KiB
C
/*
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* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <gpxe/netdevice.h>
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#include <gpxe/dhcp.h>
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#include <gpxe/settings.h>
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#include <gpxe/image.h>
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#include <gpxe/embedded.h>
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#include <usr/ifmgmt.h>
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#include <usr/route.h>
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#include <usr/dhcpmgmt.h>
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#include <usr/imgmgmt.h>
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#include <usr/iscsiboot.h>
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#include <usr/aoeboot.h>
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#include <usr/autoboot.h>
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/** @file
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*
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* Automatic booting
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*
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*/
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/** Time to wait for link-up */
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#define LINK_WAIT_MS 15000
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/**
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* Identify the boot network device
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*
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* @ret netdev Boot network device
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*/
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static struct net_device * find_boot_netdev ( void ) {
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return NULL;
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}
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/**
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* Boot embedded image
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*
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* @ret rc Return status code
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*/
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static int boot_embedded_image ( void ) {
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struct image *image;
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int rc;
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image = embedded_image();
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if ( !image )
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return ENOENT;
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if ( ( rc = imgload ( image ) ) != 0 ) {
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printf ( "Could not load embedded image: %s\n",
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strerror ( rc ) );
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} else if ( ( rc = imgexec ( image ) ) != 0 ) {
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printf ( "Could not boot embedded image: %s\n",
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strerror ( rc ) );
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}
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image_put ( image );
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return rc;
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}
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/**
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* Boot using filename
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*
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* @v filename Boot filename
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* @ret rc Return status code
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*/
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static int boot_filename ( const char *filename ) {
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struct image *image;
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int rc;
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image = alloc_image();
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if ( ! image ) {
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printf ( "Out of memory\n" );
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return -ENOMEM;
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}
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if ( ( rc = imgfetch ( image, filename,
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register_and_autoload_image ) ) != 0 ) {
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printf ( "Could not load %s: %s\n",
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filename, strerror ( rc ) );
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goto done;
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}
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if ( ( rc = imgexec ( image ) ) != 0 ) {
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printf ( "Could not boot %s: %s\n",
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filename, strerror ( rc ) );
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goto done;
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}
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done:
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image_put ( image );
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return rc;
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}
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/**
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* Boot using root path
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*
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* @v root_path Root path
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* @ret rc Return status code
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*/
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int boot_root_path ( const char *root_path ) {
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/* Quick hack */
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if ( strncmp ( root_path, "iscsi:", 6 ) == 0 ) {
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return iscsiboot ( root_path );
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} else if ( strncmp ( root_path, "aoe:", 4 ) == 0 ) {
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return aoeboot ( root_path );
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}
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return -ENOTSUP;
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}
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/**
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* Boot from a network device
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*
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* @v netdev Network device
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* @ret rc Return status code
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*/
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static int netboot ( struct net_device *netdev ) {
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char buf[256];
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int rc;
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/* Open device and display device status */
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if ( ( rc = ifopen ( netdev ) ) != 0 )
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return rc;
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ifstat ( netdev );
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/* Wait for link-up */
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printf ( "Waiting for link-up on %s...", netdev->name );
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if ( ( rc = iflinkwait ( netdev, LINK_WAIT_MS ) ) != 0 ) {
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printf ( " no link detected\n" );
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return rc;
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}
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printf ( " ok\n" );
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/* Configure device via DHCP */
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if ( ( rc = dhcp ( netdev ) ) != 0 )
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return rc;
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route();
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/* Try to boot an embedded image if we have one */
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rc = boot_embedded_image ();
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if ( rc != ENOENT )
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return rc;
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/* Try to download and boot whatever we are given as a filename */
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fetch_string_setting ( NULL, &filename_setting, buf, sizeof ( buf ) );
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if ( buf[0] ) {
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printf ( "Booting from filename \"%s\"\n", buf );
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return boot_filename ( buf );
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}
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/* No filename; try the root path */
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fetch_string_setting ( NULL, &root_path_setting, buf, sizeof ( buf ) );
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if ( buf[0] ) {
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printf ( "Booting from root path \"%s\"\n", buf );
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return boot_root_path ( buf );
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}
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printf ( "No filename or root path specified\n" );
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return -ENOENT;
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}
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/**
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* Close all open net devices
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*
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* Called before a fresh boot attempt in order to free up memory. We
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* don't just close the device immediately after the boot fails,
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* because there may still be TCP connections in the process of
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* closing.
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*/
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static void close_all_netdevs ( void ) {
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struct net_device *netdev;
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for_each_netdev ( netdev ) {
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ifclose ( netdev );
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}
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}
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/**
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* Boot the system
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*/
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void autoboot ( void ) {
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struct net_device *boot_netdev;
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struct net_device *netdev;
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/* If we have an identifable boot device, try that first */
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close_all_netdevs();
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if ( ( boot_netdev = find_boot_netdev() ) )
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netboot ( boot_netdev );
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/* If that fails, try booting from any of the other devices */
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for_each_netdev ( netdev ) {
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if ( netdev == boot_netdev )
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continue;
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close_all_netdevs();
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netboot ( netdev );
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}
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printf ( "No more network devices\n" );
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}
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