path: root/scripts
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authorChen Qi <>2018-06-07 15:52:47 +0800
committerRichard Purdie <>2018-06-18 10:59:33 +0100
commit322e41de7f4fb21315bf75f1038314c31ac4754b (patch)
tree9f6128b7e2d91110492b5d0c3e3992f25b5da491 /scripts
parent02709d4709c56f9b9095e3555da35b659b03a8a3 (diff)
runqemu-ifdown: ensure to clean up TAP
In runqemu-ifup, ip command is used to add TAP; in runqemu-ifdown, we should do the reversed logic, using ip command to delete TAP, to make sure TAP is cleaned up by ourselves. I can see that in runqemu-ifdown script, 'tunctl -d' and 'iptables' commands are used to deal with TAP, but these two commands cannot make sure that the TAP is cleaned up. runqemu-ifup uses 'ip' to set up TAP, we really need to do the opposite in runqemu-ifdown. Signed-off-by: Chen Qi <> Signed-off-by: Richard Purdie <>
Diffstat (limited to 'scripts')
1 files changed, 10 insertions, 0 deletions
diff --git a/scripts/runqemu-ifdown b/scripts/runqemu-ifdown
index ffbc9de442..2486968588 100755
--- a/scripts/runqemu-ifdown
+++ b/scripts/runqemu-ifdown
@@ -51,6 +51,16 @@ fi
+IFCONFIG=`which ip 2> /dev/null`
+if [ "x$IFCONFIG" = "x" ]; then
+ # better than nothing...
+ IFCONFIG=/sbin/ip
+if [ -x "$IFCONFIG" ]; then
+ if `$IFCONFIG link show $TAP > /dev/null 2>&1`; then
+ $IFCONFIG link del $TAP
+ fi
# cleanup the remaining iptables rules
IPTABLES=`which iptables 2> /dev/null`
if [ "x$IPTABLES" = "x" ]; then