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acinclude.m4
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# -*- autoconf -*-
# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2019 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
dnl OVS_ENABLE_WERROR
AC_DEFUN([OVS_ENABLE_WERROR],
[AC_ARG_ENABLE(
[Werror],
[AC_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
[], [enable_Werror=no])
AC_CONFIG_COMMANDS_PRE(
[if test "X$enable_Werror" = Xyes; then
OVS_CFLAGS="$OVS_CFLAGS -Werror"
fi])
# Unless --enable-Werror is specified, report but do not fail the build
# for errors reported by flake8.
if test "X$enable_Werror" = Xyes; then
FLAKE8_WERROR=
else
FLAKE8_WERROR=-
fi
AC_SUBST([FLAKE8_WERROR])
# If --enable-Werror is specified, fail the build on sparse warnings.
if test "X$enable_Werror" = Xyes; then
SPARSE_WERROR=-Wsparse-error
else
SPARSE_WERROR=
fi
AC_SUBST([SPARSE_WERROR])])
dnl OVS_CHECK_LINUX
dnl
dnl Configure linux kernel source tree
AC_DEFUN([OVS_CHECK_LINUX], [
AC_ARG_WITH([linux],
[AC_HELP_STRING([--with-linux=/path/to/linux],
[Specify the Linux kernel build directory])])
AC_ARG_WITH([linux-source],
[AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
[Specify the Linux kernel source directory
(usually figured out automatically from build
directory)])])
# Deprecated equivalents to --with-linux, --with-linux-source.
AC_ARG_WITH([l26])
AC_ARG_WITH([l26-source])
if test X"$with_linux" != X; then
KBUILD=$with_linux
elif test X"$with_l26" != X; then
KBUILD=$with_l26
AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
else
KBUILD=
fi
if test X"$KBUILD" != X; then
if test X"$with_linux_source" != X; then
KSRC=$with_linux_source
elif test X"$with_l26_source" != X; then
KSRC=$with_l26_source
AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
else
KSRC=
fi
elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
fi
if test -n "$KBUILD"; then
KBUILD=`eval echo "$KBUILD"`
case $KBUILD in
/*) ;;
*) KBUILD=`pwd`/$KBUILD ;;
esac
# The build directory is what the user provided.
# Make sure that it exists.
AC_MSG_CHECKING([for Linux build directory])
if test -d "$KBUILD"; then
AC_MSG_RESULT([$KBUILD])
AC_SUBST(KBUILD)
else
AC_MSG_RESULT([no])
AC_ERROR([source dir $KBUILD doesn't exist])
fi
# Debian breaks kernel headers into "source" header and "build" headers.
# We want the source headers, but $KBUILD gives us the "build" headers.
# Use heuristics to find the source headers.
AC_MSG_CHECKING([for Linux source directory])
if test -n "$KSRC"; then
KSRC=`eval echo "$KSRC"`
case $KSRC in
/*) ;;
*) KSRC=`pwd`/$KSRC ;;
esac
if test ! -e $KSRC/include/linux/kernel.h; then
AC_MSG_ERROR([$KSRC is not a kernel source directory])
fi
else
KSRC=$KBUILD
if test ! -e $KSRC/include/linux/kernel.h; then
# Debian kernel build Makefiles tend to include a line of the form:
# MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
# First try to extract the source directory from this line.
KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
if test ! -e "$KSRC"/include/linux/kernel.h; then
# Didn't work. Fall back to name-based heuristics that used to work.
case `echo "$KBUILD" | sed 's,/*$,,'` in # (
*/build)
KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
;; # (
*)
KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
;;
esac
fi
fi
if test ! -e "$KSRC"/include/linux/kernel.h; then
AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
fi
fi
AC_MSG_RESULT([$KSRC])
AC_MSG_CHECKING([for kernel version])
version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
if test X"$version" = X || test X"$patchlevel" = X; then
AC_ERROR([cannot determine kernel version])
elif test X"$sublevel" = X; then
kversion=$version.$patchlevel
else
kversion=$version.$patchlevel.$sublevel
fi
AC_MSG_RESULT([$kversion])
if test "$version" -ge 5; then
if test "$version" = 5 && test "$patchlevel" -le 0; then
: # Linux 5.x
else
AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 5.0.x is not supported (please refer to the FAQ for advice)])
fi
elif test "$version" = 4; then
: # Linux 4.x
elif test "$version" = 3 && test "$patchlevel" -ge 10; then
: # Linux 3.x
else
AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
fi
if (test ! -e "$KBUILD"/include/linux/version.h && \
test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
(test ! -e "$KBUILD"/include/linux/autoconf.h && \
test ! -e "$KBUILD"/include/generated/autoconf.h); then
AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
fi
OVS_CHECK_LINUX_COMPAT
fi
AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
])
dnl OVS_CHECK_LINUX_NETLINK
dnl
dnl Configure Linux netlink compat.
AC_DEFUN([OVS_CHECK_LINUX_NETLINK], [
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/netlink.h>], [
struct nla_bitfield32 x = { 0 };
])],
[AC_DEFINE([HAVE_NLA_BITFIELD32], [1],
[Define to 1 if struct nla_bitfield32 is available.])])
])
dnl OVS_CHECK_LINUX_TC
dnl
dnl Configure Linux tc compat.
AC_DEFUN([OVS_CHECK_LINUX_TC], [
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/pkt_cls.h>], [
int x = TCA_ACT_FLAGS;
])],
[AC_DEFINE([HAVE_TCA_ACT_FLAGS], [1],
[Define to 1 if TCA_ACT_FLAGS is available.])])
AC_CHECK_MEMBERS([struct tcf_t.firstuse], [], [], [#include <linux/pkt_cls.h>])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/tc_act/tc_vlan.h>], [
int x = TCA_VLAN_PUSH_VLAN_PRIORITY;
])],
[AC_DEFINE([HAVE_TCA_VLAN_PUSH_VLAN_PRIORITY], [1],
[Define to 1 if TCA_VLAN_PUSH_VLAN_PRIORITY is available.])])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/tc_act/tc_mpls.h>], [
int x = TCA_MPLS_TTL;
])],
[AC_DEFINE([HAVE_TCA_MPLS_TTL], [1],
[Define to 1 if HAVE_TCA_MPLS_TTL is available.])])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/tc_act/tc_tunnel_key.h>], [
int x = TCA_TUNNEL_KEY_ENC_TTL;
])],
[AC_DEFINE([HAVE_TCA_TUNNEL_KEY_ENC_TTL], [1],
[Define to 1 if TCA_TUNNEL_KEY_ENC_TTL is available.])])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/tc_act/tc_pedit.h>], [
int x = TCA_PEDIT_KEY_EX_HDR_TYPE_UDP;
])],
[AC_DEFINE([HAVE_TCA_PEDIT_KEY_EX_HDR_TYPE_UDP], [1],
[Define to 1 if TCA_PEDIT_KEY_EX_HDR_TYPE_UDP is available.])])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/tc_act/tc_skbedit.h>], [
int x = TCA_SKBEDIT_FLAGS;
])],
[AC_DEFINE([HAVE_TCA_SKBEDIT_FLAGS], [1],
[Define to 1 if TCA_SKBEDIT_FLAGS is available.])])
])
dnl OVS_CHECK_LINUX_SCTP_CT
dnl
dnl Checks for kernels which need additional SCTP state
AC_DEFUN([OVS_CHECK_LINUX_SCTP_CT], [
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_conntrack.h>
#include <linux/netfilter/nf_conntrack_common.h>
#include <linux/netfilter/nf_conntrack_sctp.h>], [
int x = SCTP_CONNTRACK_HEARTBEAT_SENT;
])],
[AC_DEFINE([HAVE_SCTP_CONNTRACK_HEARTBEATS], [1],
[Define to 1 if SCTP_CONNTRACK_HEARTBEAT_SENT is available.])])
])
dnl OVS_FIND_DEPENDENCY(FUNCTION, SEARCH_LIBS, NAME_TO_PRINT)
dnl
dnl Check for a function in a library list.
AC_DEFUN([OVS_FIND_DEPENDENCY], [
AC_SEARCH_LIBS([$1], [$2], [], [
AC_MSG_ERROR([unable to find $3, install the dependency package])
])
])
dnl OVS_CHECK_LINUX_AF_XDP
dnl
dnl Check both Linux kernel AF_XDP and libbpf support
AC_DEFUN([OVS_CHECK_LINUX_AF_XDP], [
AC_ARG_ENABLE([afxdp],
[AC_HELP_STRING([--enable-afxdp], [Enable AF-XDP support])],
[], [enable_afxdp=no])
AC_MSG_CHECKING([whether AF_XDP is enabled])
if test "$enable_afxdp" != yes; then
AC_MSG_RESULT([no])
AF_XDP_ENABLE=false
else
AC_MSG_RESULT([yes])
AF_XDP_ENABLE=true
AC_CHECK_HEADER([bpf/libbpf.h], [],
[AC_MSG_ERROR([unable to find bpf/libbpf.h for AF_XDP support])])
AC_CHECK_HEADER([linux/if_xdp.h], [],
[AC_MSG_ERROR([unable to find linux/if_xdp.h for AF_XDP support])])
AC_CHECK_HEADER([bpf/xsk.h], [],
[AC_MSG_ERROR([unable to find bpf/xsk.h for AF_XDP support])])
AC_CHECK_FUNCS([pthread_spin_lock], [],
[AC_MSG_ERROR([unable to find pthread_spin_lock for AF_XDP support])])
OVS_FIND_DEPENDENCY([numa_alloc_onnode], [numa], [libnuma])
AC_DEFINE([HAVE_AF_XDP], [1],
[Define to 1 if AF_XDP support is available and enabled.])
LIBBPF_LDADD=" -lbpf -lelf"
AC_SUBST([LIBBPF_LDADD])
AC_CHECK_DECL([xsk_ring_prod__needs_wakeup], [
AC_DEFINE([HAVE_XDP_NEED_WAKEUP], [1],
[XDP need wakeup support detected in xsk.h.])
], [], [[#include <bpf/xsk.h>]])
fi
AM_CONDITIONAL([HAVE_AF_XDP], test "$AF_XDP_ENABLE" = true)
])
dnl OVS_CHECK_DPDK
dnl
dnl Configure DPDK source tree
AC_DEFUN([OVS_CHECK_DPDK], [
AC_ARG_WITH([dpdk],
[AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
[Specify the DPDK build directory])],
[have_dpdk=true])
AC_MSG_CHECKING([whether dpdk is enabled])
if test "$have_dpdk" != true || test "$with_dpdk" = no; then
AC_MSG_RESULT([no])
DPDKLIB_FOUND=false
else
AC_MSG_RESULT([yes])
case "$with_dpdk" in
yes)
DPDK_AUTO_DISCOVER="true"
PKG_CHECK_MODULES_STATIC([DPDK], [libdpdk], [
DPDK_INCLUDE="$DPDK_CFLAGS"
DPDK_LIB="$DPDK_LIBS"], [
DPDK_INCLUDE="-I/usr/local/include/dpdk -I/usr/include/dpdk"
DPDK_LIB="-ldpdk"])
;;
*)
DPDK_AUTO_DISCOVER="false"
DPDK_INCLUDE_PATH="$with_dpdk/include"
# If 'with_dpdk' is passed install directory, point to headers
# installed in $DESTDIR/$prefix/include/dpdk
if test -e "$DPDK_INCLUDE_PATH/rte_config.h"; then
DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH"
elif test -e "$DPDK_INCLUDE_PATH/dpdk/rte_config.h"; then
DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH/dpdk"
fi
DPDK_LIB_DIR="$with_dpdk/lib"
DPDK_LIB="-ldpdk"
;;
esac
ovs_save_CFLAGS="$CFLAGS"
ovs_save_LDFLAGS="$LDFLAGS"
CFLAGS="$CFLAGS $DPDK_INCLUDE"
if test "$DPDK_AUTO_DISCOVER" = "false"; then
LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
fi
AC_CHECK_HEADERS([rte_config.h], [], [
AC_MSG_ERROR([unable to find rte_config.h in $with_dpdk])
], [AC_INCLUDES_DEFAULT])
AC_CHECK_DECLS([RTE_LIBRTE_VHOST_NUMA, RTE_EAL_NUMA_AWARE_HUGEPAGES], [
OVS_FIND_DEPENDENCY([get_mempolicy], [numa], [libnuma])
], [], [[#include <rte_config.h>]])
AC_CHECK_DECL([RTE_LIBRTE_VHOST_NUMA], [
AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])
], [], [[#include <rte_config.h>]])
AC_MSG_CHECKING([whether DPDK pdump support is enabled])
AC_ARG_ENABLE(
[dpdk-pdump],
[AC_HELP_STRING([--enable-dpdk-pdump],
[Enable DPDK pdump packet capture support])],
[AC_MSG_RESULT([yes])
AC_MSG_WARN([DPDK pdump is deprecated, consider using ovs-tcpdump instead])
AC_CHECK_DECL([RTE_LIBRTE_PMD_PCAP], [
OVS_FIND_DEPENDENCY([pcap_dump], [pcap], [libpcap])
AC_CHECK_DECL([RTE_LIBRTE_PDUMP], [
AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])
], [
AC_MSG_ERROR([RTE_LIBRTE_PDUMP is not defined in rte_config.h])
], [[#include <rte_config.h>]])
], [
AC_MSG_ERROR([RTE_LIBRTE_PMD_PCAP is not defined in rte_config.h])
], [[#include <rte_config.h>]])],
[AC_MSG_RESULT([no])])
AC_CHECK_DECL([RTE_LIBRTE_MLX5_PMD], [dnl found
OVS_FIND_DEPENDENCY([mnl_attr_put], [mnl], [libmnl])
AC_CHECK_DECL([RTE_IBVERBS_LINK_DLOPEN], [], [dnl not found
OVS_FIND_DEPENDENCY([mlx5dv_create_wq], [mlx5], [libmlx5])
OVS_FIND_DEPENDENCY([verbs_init_cq], [ibverbs], [libibverbs])
], [[#include <rte_config.h>]])
], [], [[#include <rte_config.h>]])
AC_CHECK_DECL([RTE_LIBRTE_MLX4_PMD], [dnl found
AC_CHECK_DECL([RTE_IBVERBS_LINK_DLOPEN], [], [dnl not found
OVS_FIND_DEPENDENCY([mlx4dv_init_obj], [mlx4], [libmlx4])
OVS_FIND_DEPENDENCY([verbs_init_cq], [ibverbs], [libibverbs])
], [[#include <rte_config.h>]])
], [], [[#include <rte_config.h>]])
# DPDK uses dlopen to load plugins.
OVS_FIND_DEPENDENCY([dlopen], [dl], [libdl])
AC_MSG_CHECKING([whether linking with dpdk works])
LIBS="$DPDK_LIB $LIBS"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <rte_config.h>
#include <rte_eal.h>],
[int rte_argc; char ** rte_argv;
rte_eal_init(rte_argc, rte_argv);])],
[AC_MSG_RESULT([yes])
DPDKLIB_FOUND=true],
[AC_MSG_RESULT([no])
if test "$DPDK_AUTO_DISCOVER" = "true"; then
AC_MSG_ERROR(m4_normalize([
Could not find DPDK library in default search path, Use --with-dpdk
to specify the DPDK library installed in non-standard location]))
else
AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
fi
])
CFLAGS="$ovs_save_CFLAGS"
LDFLAGS="$ovs_save_LDFLAGS"
if test "$DPDK_AUTO_DISCOVER" = "false"; then
OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
fi
OVS_CFLAGS="$OVS_CFLAGS $DPDK_INCLUDE"
OVS_ENABLE_OPTION([-mssse3])
# DPDK pmd drivers are not linked unless --whole-archive is used.
#
# This happens because the rest of the DPDK code doesn't use any symbol in
# the pmd driver objects, and the drivers register themselves using an
# __attribute__((constructor)) function.
#
# These options are specified inside a single -Wl directive to prevent
# autotools from reordering them.
#
# OTOH newer versions of dpdk pkg-config (generated with Meson)
# will already have flagged just the right set of libs with
# --whole-archive - in those cases do not wrap it once more.
case "$DPDK_LIB" in
*whole-archive*) DPDK_vswitchd_LDFLAGS=$DPDK_LIB;;
*) DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
esac
AC_SUBST([DPDK_vswitchd_LDFLAGS])
AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
fi
AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
])
dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
dnl
dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
dnl <REGEX> translated to uppercase.
AC_DEFUN([OVS_GREP_IFELSE], [
AC_MSG_CHECKING([whether $2 matches in $1])
if test -f $1; then
grep '$2' $1 >/dev/null 2>&1
status=$?
case $status in
0)
AC_MSG_RESULT([yes])
m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
;;
1)
AC_MSG_RESULT([no])
$4
;;
*)
AC_MSG_ERROR([grep exited with status $status])
;;
esac
else
AC_MSG_RESULT([file not found])
$4
fi
])
dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
dnl
dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
dnl structure definition. If this is successful, runs IF-MATCH, otherwise
dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
dnl translated to uppercase.
AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
AC_MSG_CHECKING([whether $2 has member $3 in $1])
if test -f $1; then
awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
status=$?
case $status in
0)
AC_MSG_RESULT([yes])
m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
;;
1)
AC_MSG_RESULT([no])
$5
;;
*)
AC_MSG_ERROR([grep exited with status $status])
;;
esac
else
AC_MSG_RESULT([file not found])
$5
fi
])
dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
dnl
dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
dnl the function signature starting from the line matching FUNCTION
dnl and ending with the line containing the closing parenthesis. If
dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
dnl IF-MATCH is empty then it defines to
dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
dnl <REGEX> translated to uppercase.
AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
if test -f $1; then
awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
status=$?
case $status in
0)
AC_MSG_RESULT([yes])
m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
;;
1)
AC_MSG_RESULT([no])
$5
;;
*)
AC_MSG_ERROR([grep exited with status $status])
;;
esac
else
AC_MSG_RESULT([file not found])
$5
fi
])
dnl OVS_DEFINE(NAME)
dnl
dnl Defines NAME to 1 in kcompat.h.
AC_DEFUN([OVS_DEFINE], [
echo '#define $1 1' >> datapath/linux/kcompat.h.new
])
dnl OVS_CHECK_LINUX_COMPAT
dnl
dnl Runs various Autoconf checks on the Linux kernel source in
dnl the directory in $KBUILD.
AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
rm -f datapath/linux/kcompat.h.new
mkdir -p datapath/linux
: > datapath/linux/kcompat.h.new
echo '#include <linux/version.h>
#ifndef RHEL_RELEASE_CODE
#define RHEL_RELEASE_CODE 0
#define RHEL_RELEASE_VERSION(a, b) 0
#endif' >> datapath/linux/kcompat.h.new
OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
[OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6_get_cookie],
[OVS_DEFINE([HAVE_RT6_GET_COOKIE])])
OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
[OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [static_branch_unlikely(],
[OVS_DEFINE([HAVE_UPSTREAM_STATIC_KEY])])
OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [DEFINE_STATIC_KEY_FALSE],
[OVS_DEFINE([HAVE_DEFINE_STATIC_KEY])])
OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_hwaccel_clear_tag])
OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
[OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
[OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
[OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
[OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
[ip_do_fragment], [net],
[OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
[ip_local_out], [net],
[OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
[OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
[OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
[OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
[frags_work])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
[rwlock])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
[list_evictor])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
[sub_frag_mem_limit], [struct.netns_frags],
[OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
[OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
[OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
dnl OVS does not really need ipv6 label field, but its presence signifies that
dnl the stack has all required ipv6 support.
dnl OVS also does not need dst_cache But this dependency allows us to write
dnl much cleaner code.
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
[label],
[OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
[iptunnel_pull_offloads],
[OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
[OVS_GREP_IFELSE([$KSRC/include/net/erspan.h], [erspan_md2],
[OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])])
OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
[OVS_DEFINE([USE_BUILTIN_DST_CACHE])])
OVS_GREP_IFELSE([$KSRC/include/net/mpls.h], [mpls_hdr],
[OVS_DEFINE([MPLS_HEADER_IS_L3])])
OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
[OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_gso_error_unwind])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
[OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_udp_tunnel_add])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
dnl So check type of tstats.
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
[OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
[OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_csum_hwoffload_help])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
[OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
[extended])
OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
[netdev_master_upper_dev_link], [upper_priv],
[OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
[netdev_master_upper_dev_link_rh],
[OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_RH])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
[max_mtu])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops_extended],
[ndo_change_mtu], [OVS_DEFINE([HAVE_RHEL7_MAX_MTU])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
[dev_change_flags], [extack],
[OVS_DEFINE([HAVE_DEV_CHANGE_FLAGS_TAKES_EXTACK])])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state],
[struct net ], [OVS_DEFINE([HAVE_NF_HOOK_STATE_NET])])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
[OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
[OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
[owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [NFPROTO_INET])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [CONFIG_NF_NAT_NEEDED])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
[fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_conn], [struct timer_list[[ \t]]*timeout],
[OVS_DEFINE([HAVE_NF_CONN_TIMER])])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_tmpl_alloc], [nf_conntrack_zone],
[OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_get_tuplepr], [struct.net],
[OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_set])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_is_untracked])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_invert_tuplepr])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
[nf_ct_zone_init])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_l3proto.h],
[net_ns_get])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
[nf_connlabels_get])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
[nf_connlabels_get], [int bit],
[OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
[nf_conn_labels], [words])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_range2])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_packet],
[OVS_DEFINE([HAVE_UPSTREAM_NF_NAT])])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_count.h], [nf_conncount_gc_list],
[OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_count.h],
[int nf_conncount_add],
[], [OVS_DEFINE([HAVE_UPSTREAM_NF_CONNCOUNT])])])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_timeout.h], [nf_ct_set_timeout])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_timeout.h], [struct nf_ct_timeout],
[OVS_DEFINE([HAVE_NF_CT_TIMEOUT])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_timeout.h],
[\(*nf_ct_timeout_find_get_hook\)], [net],
[OVS_DEFINE([HAVE_NF_CT_TIMEOUT_FIND_GET_HOOK_NET])])
OVS_GREP_IFELSE([$KSRC/include/linux/random.h],
[prandom_u32[[\(]]],
[OVS_DEFINE([HAVE_PRANDOM_U32])])
OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
[OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
[OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
[rcu_read_lock_held])])
OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [net_rwsem])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/rtnetlink.h],
[rtnl_create_link], [extack],
[OVS_DEFINE([HAVE_RTNL_CREATE_LINK_TAKES_EXTACK])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [nf_reset_ct])
# Check for the proto_data_valid member in struct sk_buff. The [^@]
# is necessary because some versions of this header remove the
# member but retain the kerneldoc comment that describes it (which
# starts with @). The brackets must be doubled because of m4
# quoting rules.
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
[OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
[OVS_DEFINE([HAVE_U16_RXHASH])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
[OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
[skb_copy_from_linear_data_offset])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
[skb_reset_tail_pointer])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
[OVS_DEFINE([HAVE_SKB_WARN_LRO])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
[OVS_DEFINE([HAVE_SKB_GET_HASH])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
[OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
[OVS_DEFINE([HAVE_L4_RXHASH])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_put_zero])
OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
[OVS_DEFINE([HAVE_BOOL_TYPE])])
OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
[OVS_DEFINE([HAVE_CSUM_TYPES])])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
[OVS_DEFINE([HAVE_CSUM_TYPES])])
OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
[OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
[OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_validate_flags])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
[genl_notify], [net],
[OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
[genl_multicast_group], [id])
OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
[OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
[OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_nest_start_noflag])
OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
[OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
[nla_parse], [netlink_ext_ack],
[OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/dst_metadata.h],
[metadata_dst_alloc], [metadata_type])
OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
[OVS_DEFINE([HAVE_VXLAN_METADATA])])
OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
[OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
[OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
[OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
[gro_receive])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
[OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
[OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
[OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
[udp_add_offload], [net],
[OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
[nf_defrag_ipv6_enable], [net],
[OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [family_list],
[OVS_DEFINE([HAVE_GENL_FAMILY_LIST])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
[needs_free_netdev],
[OVS_DEFINE([HAVE_NEEDS_FREE_NETDEV])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_dev], [cfg],
[OVS_DEFINE([HAVE_VXLAN_DEV_CFG])])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
[nf_conntrack_helper_put],
[OVS_DEFINE(HAVE_NF_CONNTRACK_HELPER_PUT)])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
[nf_nat_helper_try_module_get])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
[nf_nat_helper_put])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],[[[[:space:]]]SKB_GSO_UDP[[[:space:]]]],
[OVS_DEFINE([HAVE_SKB_GSO_UDP])])
OVS_GREP_IFELSE([$KSRC/include/net/dst.h],[DST_NOCACHE],
[OVS_DEFINE([HAVE_DST_NOCACHE])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_link_ops],
[extack],
[OVS_DEFINE([HAVE_EXT_ACK_IN_RTNL_LINKOPS])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
[list],
[OVS_DEFINE([HAVE_LIST_IN_NF_HOOK_OPS])])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netfilter/nf_conntrack_common.h],
[IP_CT_UNTRACKED])
OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
[netdev_master_upper_dev_link], [extack],
[OVS_DEFINE([HAVE_UPPER_DEV_LINK_EXTACK])])
OVS_GREP_IFELSE([$KSRC/include/linux/compiler_types.h],
[__LINUX_COMPILER_TYPES_H],
[OVS_DEFINE([HAVE_LINUX_COMPILER_TYPES_H])])
OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
[ktime_get_ts64],
[OVS_DEFINE([HAVE_KTIME_GET_TS64])])
OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h],
[EXPORT_SYMBOL_GPL(peernet2id_alloc)],
[OVS_DEFINE([HAVE_PEERNET2ID_ALLOC])])
OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
[ktime_get_ns],
[OVS_DEFINE([HAVE_KTIME_GET_NS])])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h],
frag_percpu_counter_batch[],
[OVS_DEFINE([HAVE_FRAG_PERCPU_COUNTER_BATCH])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
[null_compute_pseudo],
[OVS_DEFINE([HAVE_NULL_COMPUTE_PSEUDO])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
[__skb_checksum_convert],
[OVS_DEFINE([HAVE_SKB_CHECKSUM_CONVERT])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
[max_mtu],
[OVS_DEFINE([HAVE_NET_DEVICE_MAX_MTU])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip6_tunnel.h], [__ip6_tnl_parm],
[erspan_ver],
[OVS_DEFINE([HAVE_IP6_TNL_PARM_ERSPAN_VER])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
[SKB_GSO_IPXIP6],
[OVS_DEFINE([HAVE_SKB_GSO_IPXIP6])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ipv6.h],
[ip6_make_flowlabel], [fl6],
[OVS_DEFINE([HAVE_IP6_MAKE_FLOWLABEL_FL6])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ipv6.h], [netns_sysctl_ipv6],
[auto_flowlabels],
[OVS_DEFINE([HAVE_NETNS_SYSCTL_IPV6_AUTO_FLOWLABELS])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
[netif_keep_dst],
[OVS_DEFINE([HAVE_NETIF_KEEP_DST])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
[ndo_get_iflink],
[OVS_DEFINE([HAVE_NDO_GET_IFLINK])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],