stubdoms: generate stubdom config file

This patch removes the need for a second configuration file for
stubdoms: it is going to be automatically generated by the script
stubdom-dm using command line options and xenstore to find any needed
information.
The configuration script will be placed under /etc/xen/stubdoms and
automatically removed when the domain is destroyed.
The only change needed in xend is not to write on xenstore sdl,
opengl and serial command line options for qemu, because stubdoms do
not support them.
It is safe to remove those two options from xenstore because qemu does
not use xenstore to read commans line options.
Finally this patch fixes blkfront disconnections from backends and
display and xauthority variables for pv guests.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

1 files changed, 71 insertions, 9 deletions

diff --git a/stubdom/stubdom-dm b/stubdom/stubdom-dm
index f471e82b36..f431d4f69b 100644
--- a/stubdom/stubdom-dm
+++ b/stubdom/stubdom-dm
@@ -15,7 +15,10 @@ domname=
 vncviewer=0
 vncpid=
 extra=
-videoram=4
+sdl=0
+opengl=1
+vnc=0
+vncunused=0
 while [ "$#" -gt 0 ];
 do
     if [ "$#" -ge 2 ];
@@ -31,22 +34,30 @@ do
                 shift
                 ;;
 	    -vnc)
-		ip=${2%:*};
-		vnc_port=${2#*:};
+                vnc=1
+                op=${2%,*}
+		ip=${op%:*};
+		vnc_port=${op#*:};
 		shift
 		;;
+            -vncunused)
+                vncunused=1
+                shift
+                ;;
             -loadvm)
                 extra="$extra -loadvm $2";
                 shift
                 ;;
-	    -videoram)
-	        videoram="$2"
-		shift
-		;;
+            -k)
+                keymap=$2
+                shift
+                ;;
 	esac
     fi
     case "$1" in
 	-vncviewer) vncviewer=1 ;;
+        -sdl) sdl=1 ;;
+        -disable-opengl) opengl=0 ;;
     esac
     shift
 done
@@ -61,7 +72,7 @@ term() {
     (
 	[ -n "$vncpid" ] && kill -9 $vncpid
 	xm destroy $domname-dm
-	#xm destroy $domname
+        rm /etc/xen/stubdoms/$domname-dm
     ) &
     # We need to exit immediately so as to let xend do the commands above
     exit 0
@@ -77,7 +88,58 @@ do
 	sleep 1
 done
 
-creation="xm create -c $domname-dm target=$domid memory=32 videoram=$videoram extra=\"$extra\""
+# Generate stubdom config file
+mkdir -p /etc/xen/stubdoms &>/dev/null
+echo "#This file is autogenerated, edit $domname instead!" > /etc/xen/stubdoms/$domname-dm
+echo "kernel = '/usr/lib/xen/boot/ioemu-stubdom.gz'" >> /etc/xen/stubdoms/$domname-dm
+
+vfb="sdl=$sdl, opengl=$opengl"
+test "$DISPLAY" && vfb="$vfb, display=$DISPLAY"
+test "$XAUTHORITY" && vfb="$vfb, xauthority=$XAUTHORITY"
+test $vnc != 0 && vfb="$vfb, vnc=$vnc, vncdisplay=$vnc_port, vnclisten=$ip, vncunused=$vncunused"
+vncpasswd=`xenstore-read /local/domain/0/backend/vfb/$domid/0/vncpasswd 2>/dev/null`
+test "$vncpasswd" && vfb="$vfb, vncpasswd=$vncpasswd"
+test "$keymap" && vfb="$vfb, keymap=$keymap"
+echo "vfb = ['$vfb']" >> /etc/xen/stubdoms/$domname-dm
+
+echo -n "disk = [ " >> /etc/xen/stubdoms/$domname-dm
+j=0
+for i in `xenstore-ls /local/domain/$domid/device/vbd | grep 'backend =' | awk '{print $3}'`
+do
+    i=${i%\"}
+    i=${i#\"}
+    vbd_mode=`xenstore-read $i/mode`
+    vbd_disk=`xenstore-read $i/params`
+    vbd_type=`xenstore-read $i/type`
+    vbd_dev=`xenstore-read $i/dev`
+    if [ $vbd_type = "file" ]
+    then
+        vbd_type="tap:aio"
+    fi
+    if [ $j -ne 0 ]
+    then
+        echo -n "," >> /etc/xen/stubdoms/$domname-dm
+    fi
+    echo -n "'$vbd_type:$vbd_disk,$vbd_dev,$vbd_mode'" >> /etc/xen/stubdoms/$domname-dm
+    j=$(( $j + 1 ))
+done
+echo " ] " >> /etc/xen/stubdoms/$domname-dm
+echo -n "vif = [ " >> /etc/xen/stubdoms/$domname-dm
+j=0
+for i in `xenstore-ls /local/domain/$domid/device/vif | grep 'backend =' | awk '{print $3}'`
+do
+    i=${i%\"}
+    i=${i#\"}
+    vif_mac=`xenstore-read $i/mac`
+    if [ $j -ne 0 ]
+    then
+        echo -n "," >> /etc/xen/stubdoms/$domname-dm
+    fi
+    echo -n "'mac=$vif_mac'" >> /etc/xen/stubdoms/$domname-dm
+    j=$(( $j + 1 ))
+done
+echo " ] " >> /etc/xen/stubdoms/$domname-dm
+creation="xm create -c /etc/xen/stubdoms/$domname-dm target=$domid memory=32 extra=\"$extra\""
 
 (while true ; do sleep 60 ; done) | /bin/sh -c "$creation" &
 #xterm -geometry +0+0 -e /bin/sh -c "$creation ; echo ; echo press ENTER to shut down ; read" &