X-Git-Url: https://git.rrq.au/?a=blobdiff_plain;f=functions;h=fa1d527012262a85a85c8b718cf28fe71a9be71a;hb=3d79be7fb7f458f5f09e2c9ab651bb7f4e8345e2;hp=ddcd97dd99fe7f4ed85ab93ec03694216faf5a9a;hpb=a55dec2999e4c8b2ec82671d2f90f065c298e241;p=rrq%2Foverlay-boot.git

diff --git a/functions b/functions
index ddcd97d..fa1d527 100644
--- a/functions
+++ b/functions
@@ -11,6 +11,10 @@ die() {
     exit 1
 }
 
+beginswith() {
+    [ "$1" != "${1#$2}" ]
+}
+
 # Function to setup subhost name and log file
 subhost_name() {
     CONFIG="$1"
@@ -88,6 +92,9 @@ EOF
 
 # Setup the network namespace for the given $CABLES
 # $1=netns ( $2="br=mac" .. )
+# br is optional, mac is optional.
+# If mac is .N then it's taken as vlan tag on prior outer interface
+# (with ifup configuration) and the inner interface is left alone.
 setup_veth_cables() {
     local NETNS BR IF MAC C i ADD
     NETNS="$1"
@@ -96,14 +103,23 @@ setup_veth_cables() {
     for C in "$@" ; do
 	IF=$NETNS$i
 	MAC="${C#*=}"
-	[ -z "$MAC" ] || MAC="address $MAC"
-	ip link add $IF type veth peer name eth$i $MAC netns $NETNS
-	ip link set $IF up
+	if [ -z "$MAC" ] ; then
+	    # set up veth with "random" mac address
+	    ip link add $IF type veth peer name eth$i netns $NETNS
+	elif [ -z "${MAC%%.*}" ] ; then
+	    # set up a host vlan with specified tag on previous eth 
+	    i=$((i-1))
+	    IF=$NETNS$i$MAC
+	    ifup $IF
+ 	else
+	    # set up veth with specified mac address
+	    ip link add $IF type veth peer name eth$i address $MAC netns $NETNS
+	fi
 	BR="${C%=*}"
 	if [ -z "$BR" ] ; then
-	    ip link set $IF
-	    ifup $IF
+	    ifup $IF || ip link set $IF up
 	else
+	    ip link set $IF up
 	    brctl addif $BR $IF
 	fi
 	i=$((i+1))
@@ -147,17 +163,17 @@ setup_overlay() {
     elif [ "$LIVE" != "$UPPER" ] ; then
 	# With UPPER = LOWER we rather make a bind mount to LIVE
 	env CONFIG="$CONFIG" $PREMOUNT "$UPPER"
-	mount --bind $UPPER $LOWER
+	mount --bind $UPPER $LIVE
     fi
 
     grep ^SHARE= "$CONFIG" | while read A ; do
         B="$(echo ${A#SHARE=})"
-        D="$(realpath "$LOWER$B")"
+        D="$(realpath "$B")"
         [ "$D" = "$LOWER" ] && continue
         if [ -d "$D" ] ; then
-            echo bind mount $D onto $LIVE$D
+            echo bind mount $D onto $LIVE$B
             mkdir -p $LIVE$D
-            mount --bind $D $LIVE$D
+            mount --bind $D $LIVE$B
         fi
     done