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authorH. Peter Anvin <hpa@zytor.com>2008-03-26 16:25:35 -0700
committerH. Peter Anvin <hpa@zytor.com>2008-03-26 16:25:35 -0700
commit9eddd22a7b53b1d02fbae0d987df8af122924248 (patch)
tree882f5152880b0b1aa2d7a0619d30065acc69fb16 /gpxe/src/usr/autoboot.c
parentbbb8f15936b851e6a0ef6f7bb2c95197bff35994 (diff)
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Add gPXE into the source tree; build unified imagesyslinux-3.70-pre7
Diffstat (limited to 'gpxe/src/usr/autoboot.c')
-rw-r--r--gpxe/src/usr/autoboot.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/gpxe/src/usr/autoboot.c b/gpxe/src/usr/autoboot.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., 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" );
+}