Moved network init to a separate bootscript

Enabled recovery serial console (tested on kgpe-d16)
Minor fix to kexec-boot to correct xen boot
Remove busybox power utils

boards/kgpe-d16.config

@@ -18,15 +18,15 @@ CONFIG_DROPBEAR=y
 
 CONFIG_LINUX_USB=y
 CONFIG_LINUX_E1000E=y
-CONFIG_LINUX_PTY=y
 
-CONFIG_BOOTSCRIPT=/bin/generic-init
+export CONFIG_BOOTSCRIPT=/bin/generic-init
+#export CONFIG_BOOTSCRIPT_NETWORK=/bin/network-init-recovery
 
-CONFIG_BOOT_REQ_HASH=n
-CONFIG_BOOT_REQ_ROLLBACK=n
-CONFIG_BOOT_KERNEL_ADD="nohz=on console=ttyS1,115200n8 "
-CONFIG_BOOT_KERNEL_REMOVE=""
-CONFIG_BOOT_DEV="/dev/sda1"
-CONFIG_USB_BOOT_DEV="/dev/sdb1"
-CONFIG_BOOT_RECOVERY_SERIAL="/dev/ttyS0"
-CONFIG_BOOT_LOCAL=y
+export CONFIG_BOOT_REQ_HASH=n
+export CONFIG_BOOT_REQ_ROLLBACK=n
+export CONFIG_BOOT_KERNEL_ADD="nohz=on console=ttyS1,115200n8 "
+export CONFIG_BOOT_KERNEL_REMOVE=""
+export CONFIG_BOOT_DEV="/dev/sda1"
+export CONFIG_USB_BOOT_DEV="/dev/sdb1"
+export CONFIG_BOOT_RECOVERY_SERIAL="/dev/ttyS0"
+#export CONFIG_BOOT_STATIC_IP=192.168.1.2

boards/qemu-linuxboot.config

@@ -30,11 +30,13 @@ CONFIG_LINUX_ATA=y
 CONFIG_LINUX_AHCI=y
 
 export CONFIG_BOOTSCRIPT=/bin/generic-init
+export CONFIG_BOOTSCRIPT_NETWORK=/bin/network-init-recovery
 
 export CONFIG_BOOT_REQ_HASH=n
 export CONFIG_BOOT_REQ_ROLLBACK=n
 export CONFIG_BOOT_DEV="/dev/sda1"
 export CONFIG_USB_BOOT_DEV="/dev/sdb1"
+export CONFIG_BOOT_STATIC_IP=10.0.2.15
 
 # You can ssh into the qemu instance by running
 # ssh -p 5555 root@localhost

config/busybox.config

@@ -470,9 +470,9 @@ CONFIG_FEATURE_XARGS_SUPPORT_ARGS_FILE=y
 # CONFIG_BOOTCHARTD is not set
 # CONFIG_FEATURE_BOOTCHARTD_BLOATED_HEADER is not set
 # CONFIG_FEATURE_BOOTCHARTD_CONFIG_FILE is not set
-CONFIG_HALT=y
-CONFIG_POWEROFF=y
-CONFIG_REBOOT=y
+# CONFIG_HALT is not set
+# CONFIG_POWEROFF is not set
+# CONFIG_REBOOT is not set
 # CONFIG_FEATURE_CALL_TELINIT is not set
 CONFIG_TELINIT_PATH=""
 # CONFIG_INIT is not set

initrd/bin/kexec-boot

@@ -66,16 +66,15 @@ do
 	firstval=`echo $line | cut -d\  -f2`
 	restval=`echo $line | cut -d\  -f3-`
 	if [ "$key" = "kernel" ]; then
+		fix_file_path
 		if [ "$kexectype" = "xen" ]; then
-			# always overload xen and with custom arguments
-			kexeccmd="$kexeccmd -l $bootdir$firstval"
+			# always use xen with custom arguments
+			kexeccmd="$kexeccmd -l $filepath"
 			kexeccmd="$kexeccmd --command-line \"no-real-mode reboot=no vga=current\""
 		elif [ "$kexectype" = "multiboot" ]; then
-			fix_file_path
 			kexeccmd="$kexeccmd -l $filepath"
 			kexeccmd="$kexeccmd --command-line \"$restval\""
 		else
-			fix_file_path
 			kexeccmd="$kexeccmd -l $filepath"
 		fi
 	fi

initrd/bin/network-init-recovery

@@ -0,0 +1,29 @@
+#!/bin/ash
+
+# bring up the ethernet; maybe should do DHCP?
+ifconfig lo 127.0.0.1
+
+if [ -f /lib/modules/e1000.ko ]; then
+	insmod /lib/modules/e1000.ko
+fi
+
+if [ -f /lib/modules/e1000e.ko ]; then
+	insmod /lib/modules/e1000e.ko
+fi
+
+if [ -e /sys/class/net/eth0 ]; then
+	# Setup static IP
+	if [ ! -z "$CONFIG_BOOT_STATIC_IP" ]; then
+		ifconfig eth0 $CONFIG_BOOT_STATIC_IP
+	fi
+	# TODO: setup DHCP if available
+	ifconfig eth0 > /dev/ttyprintk
+
+	# Setup the ssh server, allow root logins and log to stderr
+	if [ ! -d /etc/dropbear ]; then
+		mkdir /etc/dropbear
+	fi
+	dropbear -B -R 2>/dev/ttyprintk
+
+	ifconfig eth0 | head -1 > /dev/tty0
+fi

initrd/etc/functions

@@ -25,6 +25,10 @@ recovery() {
 	exec /bin/ash
 }
 
+pause_recovery() {
+	read -p 'Hit enter to proceed to recovery shell:'
+	recovery $*
+}
 
 pcrs() {
 	head -7 /sys/class/tpm/tpm0/pcrs

initrd/init

@@ -26,22 +26,6 @@ if [ ! -r /dev/ptmx ]; then
 	ln -s /dev/pts/ptmx /dev/ptmx
 fi
 
-# bring up the ethernet; maybe should do DHCP?
-ifconfig lo 127.0.0.1
-
-if [ -f /lib/modules/e1000.ko ]; then
-  insmod /lib/modules/e1000.ko
-  ifconfig eth0 10.0.2.15  # qemu
-  ifconfig eth0 > /dev/ttyprintk
-
-# Setup the ssh server, allow root logins and log to stderr
-  if [ ! -d /etc/dropbear ]; then
-    mkdir /etc/dropbear
-  fi
-  dropbear -B -R 2>/dev/ttyprintk
-  ifconfig eth0 | head -1 > /dev/tty0
-fi
-
 # Recovery shells will erase anything from here
 mkdir -p /tmp/secret
 
@@ -67,11 +51,12 @@ if [ ! -z "$CONFIG_USB_BOOT_DEV" ]; then
 	echo >> /etc/fstab "$CONFIG_USB_BOOT_DEV /media auto defaults,ro 0 0"
 fi
 
-if [ ! -x "$CONFIG_BOOTSCRIPT" ]; then
-	recovery 'Boot script missing?  Entering recovery shell'
-	# just in case...
-	tpm extend -ix 4 -ic recovery
-	exec /bin/ash
+# Setup recovery serial shell
+if [ ! -z "$CONFIG_BOOT_RECOVERY_SERIAL" ]; then
+	stty -F "$CONFIG_BOOT_RECOVERY_SERIAL" 115200
+	pause_recovery 'Console recovery shell' \
+		< "$CONFIG_BOOT_RECOVERY_SERIAL" \
+		> "$CONFIG_BOOT_RECOVERY_SERIAL" 2>&1 &
 fi
 
 # If the user has been holding down r, enter a recovery shell
@@ -87,15 +72,37 @@ if [ "$boot_option" = "r" ]; then
 	# Start an interactive shell
 	recovery 'User requested recovery shell'
 	# just in case...
-	tpm extend -ix 4 -ic recovery
+	if [ "$CONFIG_TPM" = y ]; then
+		tpm extend -ix 4 -ic recovery
+	fi
 	exec /bin/ash
+	exit
 fi
 
-echo '***** Normal boot:' $CONFIG_BOOTSCRIPT
-exec "$CONFIG_BOOTSCRIPT"
+if [ ! -x "$CONFIG_BOOTSCRIPT" -a ! -x "$CONFIG_BOOTSCRIPT_NETWORK" ]; then
+	recovery 'Boot script missing?  Entering recovery shell'
+else
+	if [ -x "$CONFIG_BOOTSCRIPT_NETWORK" ]; then
+		echo '***** Network Boot:' $CONFIG_BOOTSCRIPT_NETWORK
+		$CONFIG_BOOTSCRIPT_NETWORK
+		echo '***** Network Boot Completed:' $CONFIG_BOOTSCRIPT_NETWORK
+		# not blocking
+	fi
+
+	if [ -x "$CONFIG_BOOTSCRIPT" ]; then
+		echo '***** Normal boot:' $CONFIG_BOOTSCRIPT
+		exec "$CONFIG_BOOTSCRIPT"
+
+		# We should never reach here, but just in case...
+		recovery 'Boot script failure?  Entering recovery shell'
+	else
+		# wait for boot via network to occur
+		pause_recovery 'Override network boot. Entering recovery shell'
+	fi
+fi
 
-# We should never reach here, but just in case...
-recovery 'Boot script failure?  Entering recovery shell'
 # belts and suspenders, just in case...
-tpm extend -ix 4 -ic recovery
+if [ "$CONFIG_TPM" = y ]; then
+	tpm extend -ix 4 -ic recovery
+fi
 exec /bin/ash