selftests: rtnetlink.sh: add test case for device ifalias

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/rtnetlink.sh b/tools/testing/selftests/net/rtnetlink.sh
index 57b5ff5..4b48de5 100755 (executable)
--- a/tools/testing/selftests/net/rtnetlink.sh
+++ b/tools/testing/selftests/net/rtnetlink.sh
@@ -15,6 +15,14 @@ check_err()
        fi
 }
 
+# same but inverted -- used when command must fail for test to pass
+check_fail()
+{
+       if [ $1 -eq 0 ]; then
+               ret=1
+       fi
+}
+
 kci_add_dummy()
 {
        ip link add name "$devdummy" type dummy
@@ -235,6 +243,54 @@ kci_test_addrlabel()
        echo "PASS: ipv6 addrlabel"
 }
 
+kci_test_ifalias()
+{
+       ret=0
+       namewant=$(uuidgen)
+       syspathname="/sys/class/net/$devdummy/ifalias"
+
+       ip link set dev "$devdummy" alias "$namewant"
+       check_err $?
+
+       if [ $ret -ne 0 ]; then
+               echo "FAIL: cannot set interface alias of $devdummy to $namewant"
+               return 1
+       fi
+
+       ip link show "$devdummy" | grep -q "alias $namewant"
+       check_err $?
+
+       if [ -r "$syspathname" ] ; then
+               read namehave < "$syspathname"
+               if [ "$namewant" != "$namehave" ]; then
+                       echo "FAIL: did set ifalias $namewant but got $namehave"
+                       return 1
+               fi
+
+               namewant=$(uuidgen)
+               echo "$namewant" > "$syspathname"
+               ip link show "$devdummy" | grep -q "alias $namewant"
+               check_err $?
+
+               # sysfs interface allows to delete alias again
+               echo "" > "$syspathname"
+
+               ip link show "$devdummy" | grep -q "alias $namewant"
+               check_fail $?
+
+               # re-add the alias -- kernel should free mem when dummy dev is removed
+               ip link set dev "$devdummy" alias "$namewant"
+               check_err $?
+       fi
+
+       if [ $ret -ne 0 ]; then
+               echo "FAIL: set interface alias $devdummy to $namewant"
+               return 1
+       fi
+
+       echo "PASS: set ifalias $namewant for $devdummy"
+}
+
 kci_test_rtnl()
 {
        kci_add_dummy
@@ -249,6 +305,7 @@ kci_test_rtnl()
        kci_test_gre
        kci_test_bridge
        kci_test_addrlabel
+       kci_test_ifalias
 
        kci_del_dummy
 }