diff options
Diffstat (limited to 'gpxe/src/usr/autoboot.c')
| -rw-r--r-- | gpxe/src/usr/autoboot.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/gpxe/src/usr/autoboot.c b/gpxe/src/usr/autoboot.c new file mode 100644 index 00000000..c1a61ec0 --- /dev/null +++ b/gpxe/src/usr/autoboot.c @@ -0,0 +1,204 @@ +/* + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <string.h> +#include <stdio.h> +#include <errno.h> +#include <gpxe/netdevice.h> +#include <gpxe/dhcp.h> +#include <gpxe/settings.h> +#include <gpxe/image.h> +#include <gpxe/embedded.h> +#include <usr/ifmgmt.h> +#include <usr/route.h> +#include <usr/dhcpmgmt.h> +#include <usr/imgmgmt.h> +#include <usr/iscsiboot.h> +#include <usr/aoeboot.h> +#include <usr/autoboot.h> + +/** @file + * + * Automatic booting + * + */ + +/** + * Identify the boot network device + * + * @ret netdev Boot network device + */ +static struct net_device * find_boot_netdev ( void ) { + return NULL; +} + +/** + * Boot embedded image + * + * @ret rc Return status code + */ +static int boot_embedded_image ( void ) { + struct image *image; + int rc; + + image = embedded_image(); + if ( !image ) + return ENOENT; + + if ( ( rc = imgload ( image ) ) != 0 ) { + printf ( "Could not load embedded image: %s\n", + strerror ( rc ) ); + } else if ( ( rc = imgexec ( image ) ) != 0 ) { + printf ( "Could not boot embedded image: %s\n", + strerror ( rc ) ); + } + image_put ( image ); + return rc; +} + +/** + * Boot using filename + * + * @v filename Boot filename + * @ret rc Return status code + */ +static int boot_filename ( const char *filename ) { + struct image *image; + int rc; + + image = alloc_image(); + if ( ! image ) { + printf ( "Out of memory\n" ); + return -ENOMEM; + } + if ( ( rc = imgfetch ( image, filename, + register_and_autoload_image ) ) != 0 ) { + printf ( "Could not load %s: %s\n", + filename, strerror ( rc ) ); + goto done; + } + if ( ( rc = imgexec ( image ) ) != 0 ) { + printf ( "Could not boot %s: %s\n", + filename, strerror ( rc ) ); + goto done; + } + + done: + image_put ( image ); + return rc; +} + +/** + * Boot using root path + * + * @v root_path Root path + * @ret rc Return status code + */ +int boot_root_path ( const char *root_path ) { + + /* Quick hack */ + if ( strncmp ( root_path, "iscsi:", 6 ) == 0 ) { + return iscsiboot ( root_path ); + } else if ( strncmp ( root_path, "aoe:", 4 ) == 0 ) { + return aoeboot ( root_path ); + } + + return -ENOTSUP; +} + +/** + * Boot from a network device + * + * @v netdev Network device + * @ret rc Return status code + */ +static int netboot ( struct net_device *netdev ) { + char buf[256]; + int rc; + + /* Open device and display device status */ + if ( ( rc = ifopen ( netdev ) ) != 0 ) + return rc; + ifstat ( netdev ); + + /* Configure device via DHCP */ + if ( ( rc = dhcp ( netdev ) ) != 0 ) + return rc; + route(); + + /* Try to boot an embedded image if we have one */ + rc = boot_embedded_image (); + if ( rc != ENOENT ) + return rc; + + /* Try to download and boot whatever we are given as a filename */ + fetch_string_setting ( NULL, &filename_setting, buf, sizeof ( buf ) ); + if ( buf[0] ) { + printf ( "Booting from filename \"%s\"\n", buf ); + return boot_filename ( buf ); + } + + /* No filename; try the root path */ + fetch_string_setting ( NULL, &root_path_setting, buf, sizeof ( buf ) ); + if ( buf[0] ) { + printf ( "Booting from root path \"%s\"\n", buf ); + return boot_root_path ( buf ); + } + + printf ( "No filename or root path specified\n" ); + return -ENOENT; +} + +/** + * Close all open net devices + * + * Called before a fresh boot attempt in order to free up memory. We + * don't just close the device immediately after the boot fails, + * because there may still be TCP connections in the process of + * closing. + */ +static void close_all_netdevs ( void ) { + struct net_device *netdev; + + for_each_netdev ( netdev ) { + ifclose ( netdev ); + } +} + +/** + * Boot the system + */ +void autoboot ( void ) { + struct net_device *boot_netdev; + struct net_device *netdev; + + /* If we have an identifable boot device, try that first */ + close_all_netdevs(); + if ( ( boot_netdev = find_boot_netdev() ) ) + netboot ( boot_netdev ); + + /* If that fails, try booting from any of the other devices */ + for_each_netdev ( netdev ) { + if ( netdev == boot_netdev ) + continue; + close_all_netdevs(); + netboot ( netdev ); + } + + printf ( "No more network devices\n" ); +} |