datapath: Add support for kernel 4.18.x

No code changing is necessary to support 4.18.x.

Only one kernel test failed and it is in the process of being fixed.

Updated .travis.yml to include 4.18.x and also use latest 4.17 version.
Updated test files to test 4.18 kernel.

Tested-by: Greg Rose <[email protected]>
Reviewed-by: Greg Rose <[email protected]>
Signed-off-by: Yifeng Sun <[email protected]>
Signed-off-by: Ben Pfaff <[email protected]>

.travis.yml

@@ -38,7 +38,8 @@ env:
   - KERNEL=3.16.54 TESTSUITE=1 DPDK=1
   - KERNEL=3.16.54 DPDK_SHARED=1
   - KERNEL=3.16.54 DPDK_SHARED=1 OPTS="--enable-shared"
-  - KERNEL=4.17.14
+  - KERNEL=4.18.20
+  - KERNEL=4.17.19
   - KERNEL=4.16.18
   - KERNEL=4.15.18
   - KERNEL=4.14.63

Documentation/faq/releases.rst

@@ -68,6 +68,7 @@ Q: What Linux kernel versions does each Open vSwitch release work with?
     2.8.x        3.10 to 4.12
     2.9.x        3.10 to 4.13
     2.10.x       3.10 to 4.17
+    2.11.x       3.10 to 4.18
     ============ ==============
 
     Open vSwitch userspace should also work with the Linux kernel module built

NEWS

@@ -52,7 +52,8 @@ v2.11.0 - xx xxx xxxx
    - RHEL packaging:
      * OVN packages are split from OVS packages. A new spec
        file - ovn-fedora.spec.in is added to generate OVN packages.
-
+   - Linux datapath:
+     * Support for the kernel versions 4.18.x
 
 v2.10.0 - 18 Aug 2018
 ---------------------

acinclude.m4

@@ -151,10 +151,10 @@ AC_DEFUN([OVS_CHECK_LINUX], [
     AC_MSG_RESULT([$kversion])
 
     if test "$version" -ge 4; then
-       if test "$version" = 4 && test "$patchlevel" -le 17; then
+       if test "$version" = 4 && test "$patchlevel" -le 18; then
           : # Linux 4.x
        else
-          AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.17.x is not supported (please refer to the FAQ for advice)])
+          AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.18.x is not supported (please refer to the FAQ for advice)])
        fi
     elif test "$version" = 3 && test "$patchlevel" -ge 10; then
        : # Linux 3.x

tests/system-traffic.at

@@ -617,7 +617,7 @@ OVS_TRAFFIC_VSWITCHD_STOP
 AT_CLEANUP
 
 AT_SETUP([datapath - ping over gre tunnel by simulated packets])
-OVS_CHECK_KERNEL(3, 10, 4, 17)
+OVS_CHECK_KERNEL(3, 10, 4, 18)
 
 OVS_TRAFFIC_VSWITCHD_START()
 AT_CHECK([ovs-vsctl -- set bridge br0 other-config:hwaddr=\"f2:ff:00:00:00:01\"])
@@ -667,7 +667,7 @@ OVS_TRAFFIC_VSWITCHD_STOP
 AT_CLEANUP
 
 AT_SETUP([datapath - ping over erspan v1 tunnel by simulated packets])
-OVS_CHECK_KERNEL(3, 10, 4, 17)
+OVS_CHECK_KERNEL(3, 10, 4, 18)
 
 OVS_TRAFFIC_VSWITCHD_START()
 AT_CHECK([ovs-vsctl -- set bridge br0 other-config:hwaddr=\"f2:ff:00:00:00:01\"])
@@ -719,7 +719,7 @@ OVS_TRAFFIC_VSWITCHD_STOP
 AT_CLEANUP
 
 AT_SETUP([datapath - ping over erspan v2 tunnel by simulated packets])
-OVS_CHECK_KERNEL(3, 10, 4, 17)
+OVS_CHECK_KERNEL(3, 10, 4, 18)
 
 OVS_TRAFFIC_VSWITCHD_START()
 AT_CHECK([ovs-vsctl -- set bridge br0 other-config:hwaddr=\"f2:ff:00:00:00:01\"])
@@ -772,7 +772,7 @@ OVS_TRAFFIC_VSWITCHD_STOP
 AT_CLEANUP
 
 AT_SETUP([datapath - ping over ip6erspan v1 tunnel by simulated packets])
-OVS_CHECK_KERNEL(3, 10, 4, 17)
+OVS_CHECK_KERNEL(3, 10, 4, 18)
 
 OVS_TRAFFIC_VSWITCHD_START()
 AT_CHECK([ovs-vsctl -- set bridge br0 other-config:hwaddr=\"f2:ff:00:00:00:01\"])
@@ -827,7 +827,7 @@ OVS_TRAFFIC_VSWITCHD_STOP
 AT_CLEANUP
 
 AT_SETUP([datapath - ping over ip6erspan v2 tunnel by simulated packets])
-OVS_CHECK_KERNEL(3, 10, 4, 17)
+OVS_CHECK_KERNEL(3, 10, 4, 18)
 
 OVS_TRAFFIC_VSWITCHD_START()
 AT_CHECK([ovs-vsctl -- set bridge br0 other-config:hwaddr=\"f2:ff:00:00:00:01\"])
@@ -1066,7 +1066,7 @@ dnl   ns1: connect to br0, with IP:10.1.1.2
 dnl   br-underlay: with IP: 172.31.1.100
 dnl   ns0: connect to br-underlay, with IP: 10.1.1.1
 AT_SETUP([datapath - truncate and output to gre tunnel by simulated packets])
-OVS_CHECK_KERNEL(3, 10, 4, 17)
+OVS_CHECK_KERNEL(3, 10, 4, 18)
 AT_SKIP_IF([test $HAVE_NC = no])
 OVS_TRAFFIC_VSWITCHD_START()