[LTP] [PATCH v2] containers/netns: enable IPv6 address autoconfiguration for veth interfaces

* [LTP] [PATCH v2] containers/netns: enable IPv6 address autoconfiguration for veth interfaces
@ 2014-06-12  3:14 Xiaoguang Wang
  2014-06-17 12:58 ` chrubis
  0 siblings, 1 reply; 2+ messages in thread
From: Xiaoguang Wang @ 2014-06-12  3:14 UTC (permalink / raw)
  To: ltp-list

In some linux distributions, such as RHEL7U0RC1, when we create a veth pair
by "ip link add type veth", the ipv6 address for veth interfaces won't be
automatically generated, so the "par_chld_ipv6" test case in containers test
will fail. This is because in these distirbutions, the "/proc/sys/net/ipv6/
conf/veth*/disable_ipv6" is true for veth interfaces. Please see kernel
"Documentation/networking/ip-sysctl.txt" for more detailed information.

In this patch, we will enable IPv6 address autoconfiguration for veth interfaces
if disabled.

Signed-off-by: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>
---
 testcases/kernel/containers/netns/childipv6.sh  |  8 ++++++
 testcases/kernel/containers/netns/initialize.sh | 33 +++++++++++++++++++++++++
 testcases/kernel/containers/netns/paripv6.sh    |  5 ++++
 3 files changed, 46 insertions(+)

diff --git a/testcases/kernel/containers/netns/childipv6.sh b/testcases/kernel/containers/netns/childipv6.sh
index 073c2be..ccc43d6 100755
--- a/testcases/kernel/containers/netns/childipv6.sh
+++ b/testcases/kernel/containers/netns/childipv6.sh
@@ -45,6 +45,9 @@ status=0
 
     # waiting for the virt-eth devname and IPv6 addr from parent
     vnet1=`cat /tmp/FIFO2`
+    enable_veth_ipv6 $vnet1
+    vnet1_orig_status=$?
+
     # Assigning the dev addresses
     ifconfig $vnet1 $IP2/24 up > /dev/null 2>&1
     ifconfig lo up
@@ -75,6 +78,11 @@ status=0
                status=1
             fi
     echo $status > /tmp/FIFO6
+
+    if [ $vnet1_orig_status -eq 1 ];then
+       disable_veth_ipv6 $vnet1
+    fi
+
     debug "INFO: Done with executing child script $0"
     cleanup $sshpid $vnet1
     exit $status
diff --git a/testcases/kernel/containers/netns/initialize.sh b/testcases/kernel/containers/netns/initialize.sh
index a2c3f47..5333e7b 100755
--- a/testcases/kernel/containers/netns/initialize.sh
+++ b/testcases/kernel/containers/netns/initialize.sh
@@ -114,3 +114,36 @@ create_veth()
     ip link show > /tmp/net2
     eval `diff /tmp/net1 /tmp/net2 | awk -F": "  '/^> [0-9]*:/ { print "dev" i+0 "=" $2; i++  }'`
 }
+
+# return 1 if disabled originally, 0 for enabled originally.
+enable_veth_ipv6()
+{
+    local veth=$1
+    local veth_ipv6_status=$(cat /proc/sys/net/ipv6/conf/$veth/disable_ipv6)
+    if [ -z "$veth_ipv6_status" ];then
+        tst_resm TFAIL "Error: cat /proc/sys/net/ipv6/conf/$veth/disable_ipv6"\
+            "failed"
+        exit 1
+    elif [ "$veth_ipv6_status" = "1" ]; then
+        echo 0 > /proc/sys/net/ipv6/conf/$veth/disable_ipv6
+        if [ $? -ne 0 ];then
+            tst_resm TFAIL "Error: set " \
+                "/proc/sys/net/ipv6/conf/$veth/disable_ipv6 to 0 failed"
+            exit 1
+        fi
+        return 1
+    else
+        return 0
+    fi
+}
+
+disable_veth_ipv6()
+{
+    local veth=$1
+    echo 1 > /proc/sys/net/ipv6/conf/$veth/disable_ipv6
+    if [ $? -ne 0 ];then
+        tst_resm TFAIL "Error: set " \
+            "/proc/sys/net/ipv6/conf/$veth/disable_ipv6 to 1 failed"
+        exit 1
+    fi
+}
diff --git a/testcases/kernel/containers/netns/paripv6.sh b/testcases/kernel/containers/netns/paripv6.sh
index ac8ee57..2b02ab2 100755
--- a/testcases/kernel/containers/netns/paripv6.sh
+++ b/testcases/kernel/containers/netns/paripv6.sh
@@ -56,6 +56,8 @@ status=0
         debug "INFO: vnet0 = $vnet0 , vnet1 = $vnet1"
     fi
 
+    enable_veth_ipv6 $vnet0
+    vnet0_orig_status=$?
 
     ifconfig $vnet0 $IP1/24 up > /dev/null 2>&1
     route add -host $IP2 dev $vnet0
@@ -89,5 +91,8 @@ status=0
         status=$ret
     fi
 
+    if [ $vnet0_orig_status -eq 1 ];then
+       disable_veth_ipv6 $vnet0
+    fi
 debug "INFO: Done with executing parent script $0 "
 exit $status
-- 
1.8.2.1


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