ovs-vswitchd.at: Add test for switch over to another ovs-vswitchd.

Test the switch over to inactive ovs-vswitchd process when user
kill the currently active ovs-vswitchd.

Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Joe Stringer <joestringer@nicira.com>
datapath: Add support for RHEL-7 / CentOS-7 kernel.

This patch mostly is related to tunnel API where RHEL 7
kernel API are not in-sync with newer linux kernel API. So
extra checks are required to check for parameters of API.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Jiri Benc <jbenc@redhat.com>
Change Travis CI notification email to ljakab@ac.upc.edu
userspace: add support for pop_eth and push_eth actions

These actions will allow L2->L3 and L3->L2 switching, and are supposed
to be added to flows installed in the datapath transparently by
ovs-vswitchd.

Signed-off-by: Lorand Jakab <lojakab@cisco.com>
userspace: add layer 3 flow and switching support

This commit relaxes the assumption that all packets have an Ethernet
header, and adds support for layer 3 flows.  For each packet received on
the Linux kernel datapath the l2 and l3 members of struct ofpbuf are
intialized appropriately, and some functions now expect this (notably
flow_extract()), in order to differentiate between layer 2 and layer 3
packets.  struct flow has now a new 'base_layer' member, because we
cannot assume that a flow has no Ethernet header when eth_src and
eth_dst are 0.  For layer 3 packets, the protocol type is still stored
in the eth_type member.

Switching L2->L3 and L3->L2 are both implemented by adding the pop_eth
and push_eth actions respectively when a transition is detected.  The
push_eth action puts 0s on both source and destination MACs.  These
addresses can be modified with mod_dl_dst and mod_dl_src actions.

Added new prerequisite MFP_ETHERNET for fields MFF_ETH_SRC, MFF_ETH_DST,
MFF_VLAN_TCI, MFF_DL_VLAN, MFF_VLAN_VID and MFF_DL_VLAN_PCP.

Signed-off-by: Lorand Jakab <lojakab@cisco.com>
datapath: add layer 3 flow/port support

Implementation of the pop_eth and push_eth actions in the kernel, and
layer 3 flow support.

Signed-off-by: Lorand Jakab <lojakab@cisco.com>
Address Jesse's comment #1
Address Jesse's comment #8
Address Jesse's comment #7
Address Jesse's comment #6
Address Jesse's comment #5
Address Jesse's comment #4
Address Jesse's comment #2
Address Jesse's comment #6.1
Fix DPDK build issue