allow to send sysrq to VM builds (KVM only atm)

build

@@ -159,6 +159,9 @@ Known Parameters:
   --shell     Instead of starting a build start a root shell in
               the build root.
 
+  --sysrq $   Sends a single specifed char as sysrq to the running
+              kernel of the build.
+
   --clean     Delete old build root before initializing it
 
   --wipe      Completely removes build environment and exits.
@@ -727,6 +730,15 @@ wipe_build_environment() {
     fi  
 }
 
+sysrq_running_build() {
+    test -z "$SRCDIR" || usage
+    if test -n "$VM_TYPE" ; then
+	vm_sysrq "$1"
+    else
+	cleanup_and_exit 1 "can not send a sysrq to chroot builds"
+    fi
+}
+
 kill_running_build() {
     test -z "$SRCDIR" || usage
     (set -C; > "$BUILD_ROOT/exit" 2>/dev/null || true)
@@ -969,6 +981,11 @@ while test -n "$1"; do
 	BUILD_RPMS=
 	shift
       ;;  
+      -sysrq)
+	needarg
+	SEND_SYSRQ="${ARG:0:1}"
+	shift
+      ;;  
       -shell)
 	RUN_SHELL=1
 	shift
@@ -1055,6 +1072,11 @@ if test -n "$KILL" ; then
     cleanup_and_exit
 fi
 
+if test -n "$SEND_SYSRQ" ; then
+    sysrq_running_build "$SEND_SYSRQ"
+    cleanup_and_exit
+fi
+
 if test -n "$CLEAN_BUILD" ; then
     DO_INIT=true
     DO_INIT_TOPDIR=true

build-vm

@@ -110,6 +110,10 @@ vm_startup() {
     vm_startup_$VM_TYPE "$@"
 }
 
+vm_sysrq() {
+    vm_sysrq_$VM_TYPE "$@"
+}
+
 vm_kill() {
     vm_kill_$VM_TYPE "$@"
 }
@@ -351,7 +355,7 @@ vm_img_wipe() {
     vm_wipe_$VM_TYPE "$@"
 
     if test -n "$VM_ROOT" -a "$VM_ROOT_TYPE" = file ; then
-       rm -f "$VM_ROOT"
+       rm -f "$VM_ROOT" "${VM_ROOT}.monitor"
     fi
     if test -n "$VM_SWAP" -a "$VM_SWAP_TYPE" = file ; then
        rm -f "$VM_SWAP"
@@ -681,6 +685,7 @@ vm_setup() {
     if test ! -e "$VM_ROOT" ; then
 	cleanup_and_exit 3 "you need to create $VM_ROOT first"
     fi
+    mkfifo "${VM_ROOT}.monitor"
     if test -n "$CLEAN_BUILD" ; then
 	vm_img_mkfs "$VMDISK_FILESYSTEM" "$VM_ROOT" || cleanup_and_exit 3
     fi

build-vm-docker

@@ -74,6 +74,10 @@ vm_cleanup_docker() {
     :
 }
 
+vm_sysrq_docker() {
+    :
+}
+
 vm_wipe_docker() {
     local name="obsbuild.${BUILD_ROOT##*/}"
     docker rm "$name" >/dev/null 2>&1 || true

build-vm-ec2

@@ -164,6 +164,10 @@ vm_cleanup_ec2() {
     test -n "$EC2_EXTRACT_VOLUME_swap" && ec2-delete-volume --region "$BUILD_EC2_REGION" "$EC2_EXTRACT_VOLUME_swap"
 }
 
+vm_sysrq_ec2() {
+    :
+}
+
 vm_kill_ec2() {
     if ec2-describe-instance-status "$VM_BUILD_INSTANCE" --region "$BUILD_EC2_REGION" >/dev/null 2>&1 ; then
 	if ec2-terminate-instances "$VM_BUILD_INSTANCE" >/dev/null 2>&1 ; then

build-vm-emulator

@@ -88,6 +88,9 @@ vm_detach_swap_emulator() {
 vm_cleanup_emulator() {
     :
 }
+vm_sysrq_emulator() {
+    :
+}
 vm_wipe_emulator() {
     :
 }

build-vm-kvm

@@ -243,7 +243,7 @@ vm_startup_kvm() {
     elif test -n "$VM_CONSOLE_INPUT" ; then
 	qemu_args=("${qemu_args[@]}" -serial mon:stdio)
     else
-	qemu_args=("${qemu_args[@]}" -serial stdio)
+	qemu_args=("${qemu_args[@]}" -serial stdio -chardev socket,id=monitor,server,nowait,path="${VM_ROOT}.monitor" -mon chardev=monitor,mode=readline)
     fi
 
     if test -n "$BUILD_JOBS" -a "$icecream" = 0 -a -z "$BUILD_THREADS" ; then
@@ -327,6 +327,10 @@ vm_cleanup_kvm() {
     :
 }
 
+vm_sysrq_kvm() {
+    echo "sendkey alt-print-$1" | socat - UNIX-CONNECT:"$VM_ROOT.monitor"
+}
+
 vm_wipe_kvm() {
     :
 }

build-vm-lxc

@@ -176,6 +176,10 @@ vm_detach_swap_lxc() {
     :
 }
 
+vm_sysrq_lxc() {
+    :
+}
+
 vm_wipe_lxc() {
     :
 }

build-vm-openstack

@@ -226,6 +226,10 @@ vm_fixup_openstack() {
     chmod 0755 "$BUILD_ROOT/sbin/init"
 }
 
+vm_sysrq_openstack() {
+    :
+}
+
 vm_wipe_openstack() {
     if test -n "$VM_WORKER" ; then
          $NOVACLIENT delete $VM_WORKER

build-vm-pvm

@@ -166,6 +166,10 @@ vm_cleanup_pvm(){
     pvm_deletelv $swaplv
 }
 
+vm_sysrq_pvm(){
+    :
+}
+
 vm_wipe_pvm(){
     :
 }

build-vm-qemu

@@ -59,6 +59,10 @@ vm_cleanup_qemu() {
     vm_cleanup_kvm
 }
 
+vm_sysrq_qemu() {
+    :
+}
+
 vm_wipe_qemu() {
     :
 }

build-vm-uml

@@ -64,6 +64,10 @@ vm_cleanup_uml() {
     :
 }
 
+vm_sysrq_uml() {
+    :
+}
+
 vm_wipe_uml() {
     :
 }

build-vm-xen

@@ -133,6 +133,10 @@ vm_cleanup_xen() {
     :
 }
 
+vm_sysrq_xen() {
+    :
+}
+
 vm_wipe_xen() {
     :
 }

build-vm-zvm

@@ -371,6 +371,10 @@ vm_cleanup_zvm() {
     fi
 }
 
+vm_sysrq_zvm() {
+    :
+}
+
 vm_wipe_zvm() {
     :
 }