selftests: rtnetlink: correct the final return value for the test

The return value "ret" will be reset to 0 from the beginning of each
sub-test in rtnetlink.sh, therefore this test will always pass if the
last sub-test has passed:
    $ sudo ./rtnetlink.sh
    PASS: policy routing
    PASS: route get
    PASS: preferred_lft addresses have expired
    PASS: promote_secondaries complete
    PASS: tc htb hierarchy
    PASS: gre tunnel endpoint
    PASS: gretap
    PASS: ip6gretap
    PASS: erspan
    PASS: ip6erspan
    PASS: bridge setup
    PASS: ipv6 addrlabel
    PASS: set ifalias a39ee707-e36b-41d3-802f-63179ed4d580 for test-dummy0
    PASS: vrf
    PASS: vxlan
    FAIL: can't add fou port 7777, skipping test
    PASS: macsec
    PASS: ipsec
    3,7c3,7
    < sa[0]    spi=0x00000009 proto=0x32 salt=0x64636261 crypt=1
    < sa[0]    key=0x31323334 35363738 39303132 33343536
    < sa[1] rx ipaddr=0x00000000 00000000 00000000 c0a87b03
    < sa[1]    spi=0x00000009 proto=0x32 salt=0x64636261 crypt=1
    < sa[1]    key=0x31323334 35363738 39303132 33343536
    ---
    > sa[0]    spi=0x00000009 proto=0x32 salt=0x61626364 crypt=1
    > sa[0]    key=0x34333231 38373635 32313039 36353433
    > sa[1] rx ipaddr=0x00000000 00000000 00000000 037ba8c0
    > sa[1]    spi=0x00000009 proto=0x32 salt=0x61626364 crypt=1
    > sa[1]    key=0x34333231 38373635 32313039 36353433
    FAIL: ipsec_offload incorrect driver data
    FAIL: ipsec_offload
    PASS: bridge fdb get
    PASS: neigh get
    $ echo $?
    0

Make "ret" become a local variable for all sub-tests.
Also, check the sub-test results in kci_test_rtnl() and return the
final result for this test.

Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
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 bdbf4b3..9db66be 100755 (executable)
--- a/tools/testing/selftests/net/rtnetlink.sh
+++ b/tools/testing/selftests/net/rtnetlink.sh
@@ -5,7 +5,6 @@
 # set -e
 
 devdummy="test-dummy0"
-ret=0
 
 # Kselftest framework requirement - SKIP code is 4.
 ksft_skip=4
@@ -66,7 +65,7 @@ kci_test_bridge()
        devbr="test-br0"
        vlandev="testbr-vlan1"
 
-       ret=0
+       local ret=0
        ip link add name "$devbr" type bridge
        check_err $?
 
@@ -113,7 +112,7 @@ kci_test_gre()
        rem=10.42.42.1
        loc=10.0.0.1
 
-       ret=0
+       local ret=0
        ip tunnel add $gredev mode gre remote $rem local $loc ttl 1
        check_err $?
        ip link set $gredev up
@@ -149,7 +148,7 @@ kci_test_gre()
 kci_test_tc()
 {
        dev=lo
-       ret=0
+       local ret=0
 
        tc qdisc add dev "$dev" root handle 1: htb
        check_err $?
@@ -184,7 +183,7 @@ kci_test_tc()
 
 kci_test_polrouting()
 {
-       ret=0
+       local ret=0
        ip rule add fwmark 1 lookup 100
        check_err $?
        ip route add local 0.0.0.0/0 dev lo table 100
@@ -207,7 +206,7 @@ kci_test_route_get()
 {
        local hash_policy=$(sysctl -n net.ipv4.fib_multipath_hash_policy)
 
-       ret=0
+       local ret=0
 
        ip route get 127.0.0.1 > /dev/null
        check_err $?
@@ -290,7 +289,7 @@ kci_test_promote_secondaries()
 
 kci_test_addrlabel()
 {
-       ret=0
+       local ret=0
 
        ip addrlabel add prefix dead::/64 dev lo label 1
        check_err $?
@@ -330,7 +329,7 @@ kci_test_addrlabel()
 
 kci_test_ifalias()
 {
-       ret=0
+       local ret=0
        namewant=$(uuidgen)
        syspathname="/sys/class/net/$devdummy/ifalias"
 
@@ -385,7 +384,7 @@ kci_test_ifalias()
 kci_test_vrf()
 {
        vrfname="test-vrf"
-       ret=0
+       local ret=0
 
        ip link show type vrf 2>/dev/null
        if [ $? -ne 0 ]; then
@@ -425,7 +424,7 @@ kci_test_vrf()
 
 kci_test_encap_vxlan()
 {
-       ret=0
+       local ret=0
        vxlan="test-vxlan0"
        vlan="test-vlan0"
        testns="$1"
@@ -511,7 +510,7 @@ kci_test_encap_vxlan()
 
 kci_test_encap_fou()
 {
-       ret=0
+       local ret=0
        name="test-fou"
        testns="$1"
 
@@ -548,7 +547,7 @@ kci_test_encap_fou()
 kci_test_encap()
 {
        testns="testns"
-       ret=0
+       local ret=0
 
        ip netns add "$testns"
        if [ $? -ne 0 ]; then
@@ -573,7 +572,7 @@ kci_test_encap()
 kci_test_macsec()
 {
        msname="test_macsec0"
-       ret=0
+       local ret=0
 
        ip macsec help 2>&1 | grep -q "^Usage: ip macsec"
        if [ $? -ne 0 ]; then
@@ -631,7 +630,7 @@ kci_test_macsec()
 #-------------------------------------------------------------------
 kci_test_ipsec()
 {
-       ret=0
+       local ret=0
        algo="aead rfc4106(gcm(aes)) 0x3132333435363738393031323334353664636261 128"
        srcip=192.168.123.1
        dstip=192.168.123.2
@@ -731,7 +730,7 @@ kci_test_ipsec()
 #-------------------------------------------------------------------
 kci_test_ipsec_offload()
 {
-       ret=0
+       local ret=0
        algo="aead rfc4106(gcm(aes)) 0x3132333435363738393031323334353664636261 128"
        srcip=192.168.123.3
        dstip=192.168.123.4
@@ -841,7 +840,7 @@ kci_test_gretap()
 {
        testns="testns"
        DEV_NS=gretap00
-       ret=0
+       local ret=0
 
        ip netns add "$testns"
        if [ $? -ne 0 ]; then
@@ -891,7 +890,7 @@ kci_test_ip6gretap()
 {
        testns="testns"
        DEV_NS=ip6gretap00
-       ret=0
+       local ret=0
 
        ip netns add "$testns"
        if [ $? -ne 0 ]; then
@@ -941,7 +940,7 @@ kci_test_erspan()
 {
        testns="testns"
        DEV_NS=erspan00
-       ret=0
+       local ret=0
 
        ip link help erspan 2>&1 | grep -q "^Usage:"
        if [ $? -ne 0 ];then
@@ -1006,7 +1005,7 @@ kci_test_ip6erspan()
 {
        testns="testns"
        DEV_NS=ip6erspan00
-       ret=0
+       local ret=0
 
        ip link help ip6erspan 2>&1 | grep -q "^Usage:"
        if [ $? -ne 0 ];then
@@ -1077,7 +1076,7 @@ kci_test_fdb_get()
        test_mac=de:ad:be:ef:13:37
        localip="10.0.2.2"
        dstip="10.0.2.3"
-       ret=0
+       local ret=0
 
        bridge fdb help 2>&1 |grep -q 'bridge fdb get'
        if [ $? -ne 0 ];then
@@ -1125,7 +1124,7 @@ kci_test_neigh_get()
        dstmac=de:ad:be:ef:13:37
        dstip=10.0.2.4
        dstip6=dead::2
-       ret=0
+       local ret=0
 
        ip neigh help 2>&1 |grep -q 'ip neigh get'
        if [ $? -ne 0 ];then
@@ -1175,6 +1174,7 @@ kci_test_neigh_get()
 
 kci_test_rtnl()
 {
+       local ret=0
        kci_add_dummy
        if [ $ret -ne 0 ];then
                echo "FAIL: cannot add dummy interface"
@@ -1182,27 +1182,48 @@ kci_test_rtnl()
        fi
 
        kci_test_polrouting
+       check_err $?
        kci_test_route_get
+       check_err $?
        kci_test_addrlft
+       check_err $?
        kci_test_promote_secondaries
+       check_err $?
        kci_test_tc
+       check_err $?
        kci_test_gre
+       check_err $?
        kci_test_gretap
+       check_err $?
        kci_test_ip6gretap
+       check_err $?
        kci_test_erspan
+       check_err $?
        kci_test_ip6erspan
+       check_err $?
        kci_test_bridge
+       check_err $?
        kci_test_addrlabel
+       check_err $?
        kci_test_ifalias
+       check_err $?
        kci_test_vrf
+       check_err $?
        kci_test_encap
+       check_err $?
        kci_test_macsec
+       check_err $?
        kci_test_ipsec
+       check_err $?
        kci_test_ipsec_offload
+       check_err $?
        kci_test_fdb_get
+       check_err $?
        kci_test_neigh_get
+       check_err $?
 
        kci_del_dummy
+       return $ret
 }
 
 #check for needed privileges
@@ -1221,4 +1242,4 @@ done
 
 kci_test_rtnl
 
-exit $ret
+exit $?