unaligned: Make get_unaligned_be64() compatible on GCC and non-GCC.

Until now, with GCC, get_unaligned_be64() had an interface that accepted
a "ovs_be64 *", and with other compilers its accepted any
pointer-to-64-bit type, but not void *.  This commit fixes the problem,
making the interface the same in both cases.

This fixes a build error on MSVC:

    lib/nx-match.c(320) : error C2100: illegal indirection
    lib/nx-match.c(320) : error C2034: 'build_assert_failed' : type of bit
        field too small for number of bits
    lib/nx-match.c(320) : error C2296: '%' : illegal, left operand has
        type 'void *'
    lib/nx-match.c(320) : error C2198: 'ntohll' : too few arguments for call

It might appear that this patch changes get_unaligned_u64() but in fact
it onloy moves it earlier in the file (since it is now called from the
non-GCC fork of the #if).

Reported-by: Alin Serdean <aserdean@cloudbasesolutions.com>
Tested-by: Alin Gabriel Serdean <aserdean@cloudbasesolutions.com>
Acked-by: Alin Gabriel Serdean <aserdean@cloudbasesolutions.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
datapath-windows: Add support for OVS_DP_CMD_NEW Netlink command.

In this change, we add support for the 'OVS_DP_CMD_NEW' netlink command
in the kernel. We don't really support creation of a new datapath. If
the name of the userspace is the same as the single datapath we support,
we return EEXIST.

This code is required to bootstrap ovs-vswitchd which makes the
following sequence of calls:
open_dpif_backer() -> dpif_create_and_open() -> dpif_create()

We also rename HandleDpTransaction() to HandleDpTransactionCommon().

Signed-off-by: Nithin Raju <nithin@vmware.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Alin Gabriel Serdean <aserdean@cloudbasesolutions.com>
Tested-by: Alin Gabriel Serdean <aserdean@cloudbasesolutions.com>
datapath-windows: Update OvsGetExtInfoIoctl() to the new vport add workflow

I applied the patches for the new vport add workflow that is out for
review, and found that some of the existing code in OvsGetExtInfoIoctl()
needs to be updated. In this patch, we add a CPP called
USE_NEW_VPORT_ADD_WORKFLOW and add the fixes under
USE_NEW_VPORT_ADD_WORKFLOW == 1. The current value is set to 0, since
the vport add code is not checked in yet.

Sending out this patch to unblock the vport add code when it gets checked
in. There are other fixes also required, but they are being addressed as
part of the review comments for vport-add.

Signed-off-by: Nithin Raju <nithin@vmware.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Alin Gabriel Serdean <aserdean@cloudbasesolutions.com>
flow: Support OF1.5+ (draft) actset_output field.

This field allows a flow table to match on the output port currently in the
action set.

OF1.3 and OF1.4 should use ONFOXM_ET_ACTSET_OUTPUT; OF1.5+ should use
OXM_OF_ACTSET_OUTPUT.  The current patch uses the former for all
versions.

ONF-JIRA: EXT-233
Signed-off-by: Ben Pfaff <blp@nicira.com>