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064af421
BP		 1# -*- autoconf -*-
2
0cdd5b13 3# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2019 Nicira, Inc.
064af421 4#
a14bc59f
BP		 5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at:
064af421 8#
a14bc59f
BP		 9# http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
064af421 16
a64e37a1
BP		 17dnl OVS_ENABLE_WERROR
18AC_DEFUN([OVS_ENABLE_WERROR],
19 [AC_ARG_ENABLE(
20 [Werror],
21 [AC_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
22 [], [enable_Werror=no])
23 AC_CONFIG_COMMANDS_PRE(
24 [if test "X$enable_Werror" = Xyes; then
95626395 25 OVS_CFLAGS="$OVS_CFLAGS -Werror"
308bf988
BP		 26 fi])
27
28 # Unless --enable-Werror is specified, report but do not fail the build
29 # for errors reported by flake8.
30 if test "X$enable_Werror" = Xyes; then
31 FLAKE8_WERROR=
32 else
33 FLAKE8_WERROR=-
34 fi
df265086
BP		 35 AC_SUBST([FLAKE8_WERROR])
36
37 # If --enable-Werror is specified, fail the build on sparse warnings.
38 if test "X$enable_Werror" = Xyes; then
39 SPARSE_WERROR=-Wsparse-error
40 else
41 SPARSE_WERROR=
42 fi
43 AC_SUBST([SPARSE_WERROR])])
a64e37a1 44
e3438006 45dnl OVS_CHECK_LINUX
064af421 46dnl
997d327d 47dnl Configure linux kernel source tree
e3438006 48AC_DEFUN([OVS_CHECK_LINUX], [
8a2d6596
BP		 49 AC_ARG_WITH([linux],
50 [AC_HELP_STRING([--with-linux=/path/to/linux],
51 [Specify the Linux kernel build directory])])
52 AC_ARG_WITH([linux-source],
53 [AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
54 [Specify the Linux kernel source directory
a0903134
YT		 55 (usually figured out automatically from build
56 directory)])])
8a2d6596
BP		 57
58 # Deprecated equivalents to --with-linux, --with-linux-source.
59 AC_ARG_WITH([l26])
60 AC_ARG_WITH([l26-source])
61
62 if test X"$with_linux" != X; then
63 KBUILD=$with_linux
64 elif test X"$with_l26" != X; then
65 KBUILD=$with_l26
66 AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
67 else
68 KBUILD=
69 fi
70
71 if test X"$KBUILD" != X; then
72 if test X"$with_linux_source" != X; then
73 KSRC=$with_linux_source
74 elif test X"$with_l26_source" != X; then
75 KSRC=$with_l26_source
76 AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
0a89c170
BP		 77 else
78 KSRC=
8a2d6596
BP		 79 fi
80 elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
81 AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
82 fi
83
e3438006
BP		 84 if test -n "$KBUILD"; then
85 KBUILD=`eval echo "$KBUILD"`
86 case $KBUILD in
0b6d72fc 87 /*) ;;
e3438006 88 *) KBUILD=`pwd`/$KBUILD ;;
0b6d72fc 89 esac
064af421 90
7c9e113b
BP		 91 # The build directory is what the user provided.
92 # Make sure that it exists.
8a2d6596 93 AC_MSG_CHECKING([for Linux build directory])
e3438006 94 if test -d "$KBUILD"; then
a0903134
YT		 95 AC_MSG_RESULT([$KBUILD])
96 AC_SUBST(KBUILD)
064af421 97 else
a0903134
YT		 98 AC_MSG_RESULT([no])
99 AC_ERROR([source dir $KBUILD doesn't exist])
064af421
BP		 100 fi
101
7c9e113b 102 # Debian breaks kernel headers into "source" header and "build" headers.
e3438006 103 # We want the source headers, but $KBUILD gives us the "build" headers.
7c9e113b 104 # Use heuristics to find the source headers.
8a2d6596 105 AC_MSG_CHECKING([for Linux source directory])
e3438006
BP		 106 if test -n "$KSRC"; then
107 KSRC=`eval echo "$KSRC"`
108 case $KSRC in
f5fb5de6 109 /*) ;;
e3438006 110 *) KSRC=`pwd`/$KSRC ;;
b57f675c 111 esac
e3438006 112 if test ! -e $KSRC/include/linux/kernel.h; then
53319f95 113 AC_MSG_ERROR([$KSRC is not a kernel source directory])
f5fb5de6
BP		 114 fi
115 else
e3438006
BP		 116 KSRC=$KBUILD
117 if test ! -e $KSRC/include/linux/kernel.h; then
fe0731b1
BP		 118 # Debian kernel build Makefiles tend to include a line of the form:
119 # MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
120 # First try to extract the source directory from this line.
121 KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
122 if test ! -e "$KSRC"/include/linux/kernel.h; then
123 # Didn't work. Fall back to name-based heuristics that used to work.
124 case `echo "$KBUILD" | sed 's,/*$,,'` in # (
125 */build)
126 KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
127 ;; # (
128 *)
129 KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
130 ;;
131 esac
132 fi
f5fb5de6 133 fi
fe0731b1 134 if test ! -e "$KSRC"/include/linux/kernel.h; then
8a2d6596 135 AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
7c9e113b
BP		 136 fi
137 fi
e3438006 138 AC_MSG_RESULT([$KSRC])
7c9e113b
BP		 139
140 AC_MSG_CHECKING([for kernel version])
71fe9970 141 version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
e3438006
BP		 142 patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
143 sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
71fe9970 144 if test X"$version" = X || test X"$patchlevel" = X; then
7c9e113b 145 AC_ERROR([cannot determine kernel version])
71fe9970
BP		 146 elif test X"$sublevel" = X; then
147 kversion=$version.$patchlevel
148 else
149 kversion=$version.$patchlevel.$sublevel
7c9e113b 150 fi
71fe9970
BP		 151 AC_MSG_RESULT([$kversion])
152
2adada0e 153 if test "$version" -ge 5; then
ea58abe5 154 if test "$version" = 5 && test "$patchlevel" -le 5; then
2adada0e 155 : # Linux 5.x
d76aabea 156 else
ea58abe5 157 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 5.5.x is not supported (please refer to the FAQ for advice)])
d76aabea 158 fi
2adada0e
YS		 159 elif test "$version" = 4; then
160 : # Linux 4.x
8063e095 161 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
3afcde43 162 : # Linux 3.x
71fe9970 163 else
8063e095 164 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
064af421 165 fi
2520f452
IY		 166 if (test ! -e "$KBUILD"/include/linux/version.h && \
167 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
e3438006
BP		 168 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
169 test ! -e "$KBUILD"/include/generated/autoconf.h); then
a0903134 170 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
064af421 171 fi
e3438006 172 OVS_CHECK_LINUX_COMPAT
064af421 173 fi
e3438006 174 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
064af421
BP		 175])
176
292d5bd9
VB		 177dnl OVS_CHECK_LINUX_NETLINK
178dnl
179dnl Configure Linux netlink compat.
180AC_DEFUN([OVS_CHECK_LINUX_NETLINK], [
181 AC_COMPILE_IFELSE([
182 AC_LANG_PROGRAM([#include <linux/netlink.h>], [
183 struct nla_bitfield32 x = { 0 };
184 ])],
185 [AC_DEFINE([HAVE_NLA_BITFIELD32], [1],
186 [Define to 1 if struct nla_bitfield32 is available.])])
187])
188
1dc0da67
PB		 189dnl OVS_CHECK_LINUX_TC
190dnl
191dnl Configure Linux tc compat.
192AC_DEFUN([OVS_CHECK_LINUX_TC], [
193 AC_COMPILE_IFELSE([
194 AC_LANG_PROGRAM([#include <linux/pkt_cls.h>], [
292d5bd9 195 int x = TCA_ACT_FLAGS;
1dc0da67 196 ])],
292d5bd9
VB		 197 [AC_DEFINE([HAVE_TCA_ACT_FLAGS], [1],
198 [Define to 1 if TCA_ACT_FLAGS is available.])])
1dc0da67 199
c0a1df2e
RD		 200 AC_CHECK_MEMBERS([struct tcf_t.firstuse], [], [], [#include <linux/pkt_cls.h>])
201
1dc0da67
PB		 202 AC_COMPILE_IFELSE([
203 AC_LANG_PROGRAM([#include <linux/tc_act/tc_vlan.h>], [
204 int x = TCA_VLAN_PUSH_VLAN_PRIORITY;
205 ])],
206 [AC_DEFINE([HAVE_TCA_VLAN_PUSH_VLAN_PRIORITY], [1],
dd83253e 207 [Define to 1 if TCA_VLAN_PUSH_VLAN_PRIORITY is available.])])
1dc0da67 208
abef7959
JH		 209 AC_COMPILE_IFELSE([
210 AC_LANG_PROGRAM([#include <linux/tc_act/tc_mpls.h>], [
211 int x = TCA_MPLS_TTL;
212 ])],
213 [AC_DEFINE([HAVE_TCA_MPLS_TTL], [1],
214 [Define to 1 if HAVE_TCA_MPLS_TTL is available.])])
215
1dc0da67
PB		 216 AC_COMPILE_IFELSE([
217 AC_LANG_PROGRAM([#include <linux/tc_act/tc_tunnel_key.h>], [
4b12e454 218 int x = TCA_TUNNEL_KEY_ENC_TTL;
1dc0da67 219 ])],
4b12e454
OG		 220 [AC_DEFINE([HAVE_TCA_TUNNEL_KEY_ENC_TTL], [1],
221 [Define to 1 if TCA_TUNNEL_KEY_ENC_TTL is available.])])
e5b1657e
PB		 222
223 AC_COMPILE_IFELSE([
224 AC_LANG_PROGRAM([#include <linux/tc_act/tc_pedit.h>], [
225 int x = TCA_PEDIT_KEY_EX_HDR_TYPE_UDP;
226 ])],
227 [AC_DEFINE([HAVE_TCA_PEDIT_KEY_EX_HDR_TYPE_UDP], [1],
dd83253e 228 [Define to 1 if TCA_PEDIT_KEY_EX_HDR_TYPE_UDP is available.])])
7808b2b9
JH		 229
230 AC_COMPILE_IFELSE([
231 AC_LANG_PROGRAM([#include <linux/tc_act/tc_skbedit.h>], [
232 int x = TCA_SKBEDIT_FLAGS;
233 ])],
234 [AC_DEFINE([HAVE_TCA_SKBEDIT_FLAGS], [1],
235 [Define to 1 if TCA_SKBEDIT_FLAGS is available.])])
1dc0da67
PB		 236])
237
8c7130da
AC		 238dnl OVS_CHECK_LINUX_SCTP_CT
239dnl
240dnl Checks for kernels which need additional SCTP state
241AC_DEFUN([OVS_CHECK_LINUX_SCTP_CT], [
242 AC_COMPILE_IFELSE([
243 AC_LANG_PROGRAM([#include <linux/netfilter/nfnetlink.h>
244#include <linux/netfilter/nfnetlink_conntrack.h>
245#include <linux/netfilter/nf_conntrack_common.h>
246#include <linux/netfilter/nf_conntrack_sctp.h>], [
247 int x = SCTP_CONNTRACK_HEARTBEAT_SENT;
248 ])],
249 [AC_DEFINE([HAVE_SCTP_CONNTRACK_HEARTBEATS], [1],
250 [Define to 1 if SCTP_CONNTRACK_HEARTBEAT_SENT is available.])])
251])
252
f0d1ead8
IM		 253dnl OVS_FIND_DEPENDENCY(FUNCTION, SEARCH_LIBS, NAME_TO_PRINT)
254dnl
255dnl Check for a function in a library list.
256AC_DEFUN([OVS_FIND_DEPENDENCY], [
257 AC_SEARCH_LIBS([$1], [$2], [], [
258 AC_MSG_ERROR([unable to find $3, install the dependency package])
259 ])
260])
261
0de1b425
WT		 262dnl OVS_CHECK_LINUX_AF_XDP
263dnl
264dnl Check both Linux kernel AF_XDP and libbpf support
265AC_DEFUN([OVS_CHECK_LINUX_AF_XDP], [
266 AC_ARG_ENABLE([afxdp],
267 [AC_HELP_STRING([--enable-afxdp], [Enable AF-XDP support])],
268 [], [enable_afxdp=no])
269 AC_MSG_CHECKING([whether AF_XDP is enabled])
270 if test "$enable_afxdp" != yes; then
271 AC_MSG_RESULT([no])
272 AF_XDP_ENABLE=false
273 else
274 AC_MSG_RESULT([yes])
275 AF_XDP_ENABLE=true
276
277 AC_CHECK_HEADER([bpf/libbpf.h], [],
278 [AC_MSG_ERROR([unable to find bpf/libbpf.h for AF_XDP support])])
279
280 AC_CHECK_HEADER([linux/if_xdp.h], [],
281 [AC_MSG_ERROR([unable to find linux/if_xdp.h for AF_XDP support])])
282
283 AC_CHECK_HEADER([bpf/xsk.h], [],
284 [AC_MSG_ERROR([unable to find bpf/xsk.h for AF_XDP support])])
285
286 AC_CHECK_FUNCS([pthread_spin_lock], [],
287 [AC_MSG_ERROR([unable to find pthread_spin_lock for AF_XDP support])])
288
e8568993
YHW		 289 OVS_FIND_DEPENDENCY([numa_alloc_onnode], [numa], [libnuma])
290
0de1b425
WT		 291 AC_DEFINE([HAVE_AF_XDP], [1],
292 [Define to 1 if AF_XDP support is available and enabled.])
293 LIBBPF_LDADD=" -lbpf -lelf"
294 AC_SUBST([LIBBPF_LDADD])
e50547b5
WT		 295
296 AC_CHECK_DECL([xsk_ring_prod__needs_wakeup], [
297 AC_DEFINE([HAVE_XDP_NEED_WAKEUP], [1],
298 [XDP need wakeup support detected in xsk.h.])
299 ], [], [[#include <bpf/xsk.h>]])
0de1b425
WT		 300 fi
301 AM_CONDITIONAL([HAVE_AF_XDP], test "$AF_XDP_ENABLE" = true)
302])
303
8a9562d2
PS		 304dnl OVS_CHECK_DPDK
305dnl
306dnl Configure DPDK source tree
307AC_DEFUN([OVS_CHECK_DPDK], [
308 AC_ARG_WITH([dpdk],
309 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
4c16ee48
MV		 310 [Specify the DPDK build directory])],
311 [have_dpdk=true])
8a9562d2 312
49df3c0f 313 AC_MSG_CHECKING([whether dpdk is enabled])
4c16ee48 314 if test "$have_dpdk" != true || test "$with_dpdk" = no; then
40b5ea86
BB		 315 AC_MSG_RESULT([no])
316 DPDKLIB_FOUND=false
317 else
318 AC_MSG_RESULT([yes])
319 case "$with_dpdk" in
320 yes)
321 DPDK_AUTO_DISCOVER="true"
5b5aa2d8
CE		 322 PKG_CHECK_MODULES_STATIC([DPDK], [libdpdk], [
323 DPDK_INCLUDE="$DPDK_CFLAGS"
324 DPDK_LIB="$DPDK_LIBS"], [
325 DPDK_INCLUDE="-I/usr/local/include/dpdk -I/usr/include/dpdk"
326 DPDK_LIB="-ldpdk"])
40b5ea86
BB		 327 ;;
328 *)
329 DPDK_AUTO_DISCOVER="false"
96195c09 330 DPDK_INCLUDE_PATH="$with_dpdk/include"
40b5ea86
BB		 331 # If 'with_dpdk' is passed install directory, point to headers
332 # installed in $DESTDIR/$prefix/include/dpdk
96195c09
CE		 333 if test -e "$DPDK_INCLUDE_PATH/rte_config.h"; then
334 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH"
335 elif test -e "$DPDK_INCLUDE_PATH/dpdk/rte_config.h"; then
336 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH/dpdk"
214ac6d4 337 fi
40b5ea86 338 DPDK_LIB_DIR="$with_dpdk/lib"
5b5aa2d8 339 DPDK_LIB="-ldpdk"
40b5ea86
BB		 340 ;;
341 esac
8a9562d2 342
95626395
TG		 343 ovs_save_CFLAGS="$CFLAGS"
344 ovs_save_LDFLAGS="$LDFLAGS"
96195c09 345 CFLAGS="$CFLAGS $DPDK_INCLUDE"
40b5ea86
BB		 346 if test "$DPDK_AUTO_DISCOVER" = "false"; then
347 LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
348 fi
349
865cee2b
IM		 350 AC_CHECK_HEADERS([rte_config.h], [], [
351 AC_MSG_ERROR([unable to find rte_config.h in $with_dpdk])
352 ], [AC_INCLUDES_DEFAULT])
353
f0d1ead8
IM		 354 AC_CHECK_DECLS([RTE_LIBRTE_VHOST_NUMA, RTE_EAL_NUMA_AWARE_HUGEPAGES], [
355 OVS_FIND_DEPENDENCY([get_mempolicy], [numa], [libnuma])
356 ], [], [[#include <rte_config.h>]])
4b88d678 357
976c452a
CL		 358 AC_CHECK_DECL([RTE_LIBRTE_PMD_PCAP], [
359 OVS_FIND_DEPENDENCY([pcap_dump_close], [pcap], [libpcap])
360 ], [], [[#include <rte_config.h>]])
361
5bb068a7
CL		 362 AC_CHECK_DECL([RTE_LIBRTE_PMD_AF_XDP], [
363 LIBBPF_LDADD="-lbpf"
364 ], [], [[#include <rte_config.h>]])
365
f0d1ead8
IM		 366 AC_CHECK_DECL([RTE_LIBRTE_VHOST_NUMA], [
367 AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])
368 ], [], [[#include <rte_config.h>]])
fc3b425f 369
f0d1ead8
IM		 370 AC_CHECK_DECL([RTE_LIBRTE_MLX5_PMD], [dnl found
371 OVS_FIND_DEPENDENCY([mnl_attr_put], [mnl], [libmnl])
b926f577 372 AC_CHECK_DECL([RTE_IBVERBS_LINK_DLOPEN], [], [dnl not found
f0d1ead8
IM		 373 OVS_FIND_DEPENDENCY([mlx5dv_create_wq], [mlx5], [libmlx5])
374 OVS_FIND_DEPENDENCY([verbs_init_cq], [ibverbs], [libibverbs])
375 ], [[#include <rte_config.h>]])
376 ], [], [[#include <rte_config.h>]])
84844e3f 377
f0d1ead8 378 AC_CHECK_DECL([RTE_LIBRTE_MLX4_PMD], [dnl found
b926f577 379 AC_CHECK_DECL([RTE_IBVERBS_LINK_DLOPEN], [], [dnl not found
f0d1ead8
IM		 380 OVS_FIND_DEPENDENCY([mlx4dv_init_obj], [mlx4], [libmlx4])
381 OVS_FIND_DEPENDENCY([verbs_init_cq], [ibverbs], [libibverbs])
382 ], [[#include <rte_config.h>]])
383 ], [], [[#include <rte_config.h>]])
939bad9a 384
e2f37511
IM		 385 # DPDK uses dlopen to load plugins.
386 OVS_FIND_DEPENDENCY([dlopen], [dl], [libdl])
387
388 AC_MSG_CHECKING([whether linking with dpdk works])
389 LIBS="$DPDK_LIB $LIBS"
390 AC_LINK_IFELSE(
391 [AC_LANG_PROGRAM([#include <rte_config.h>
392 #include <rte_eal.h>],
393 [int rte_argc; char ** rte_argv;
394 rte_eal_init(rte_argc, rte_argv);])],
395 [AC_MSG_RESULT([yes])
396 DPDKLIB_FOUND=true],
397 [AC_MSG_RESULT([no])
398 if test "$DPDK_AUTO_DISCOVER" = "true"; then
399 AC_MSG_ERROR(m4_normalize([
400 Could not find DPDK library in default search path, Use --with-dpdk
401 to specify the DPDK library installed in non-standard location]))
402 else
403 AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
404 fi
405 ])
c1223b11 406
95626395
TG		 407 CFLAGS="$ovs_save_CFLAGS"
408 LDFLAGS="$ovs_save_LDFLAGS"
40b5ea86
BB		 409 if test "$DPDK_AUTO_DISCOVER" = "false"; then
410 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
411 fi
96195c09 412 OVS_CFLAGS="$OVS_CFLAGS $DPDK_INCLUDE"
ab2a3154 413 OVS_ENABLE_OPTION([-mssse3])
8a9562d2 414
3c94676c 415 # DPDK pmd drivers are not linked unless --whole-archive is used.
d7310583
DDP		 416 #
417 # This happens because the rest of the DPDK code doesn't use any symbol in
418 # the pmd driver objects, and the drivers register themselves using an
419 # __attribute__((constructor)) function.
420 #
421 # These options are specified inside a single -Wl directive to prevent
422 # autotools from reordering them.
5b5aa2d8
CE		 423 #
424 # OTOH newer versions of dpdk pkg-config (generated with Meson)
425 # will already have flagged just the right set of libs with
426 # --whole-archive - in those cases do not wrap it once more.
427 case "$DPDK_LIB" in
428 *whole-archive*) DPDK_vswitchd_LDFLAGS=$DPDK_LIB;;
429 *) DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
430 esac
9475dfeb 431 AC_SUBST([DPDK_vswitchd_LDFLAGS])
8a9562d2 432 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
8a9562d2
PS		 433 fi
434
40b5ea86 435 AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
8a9562d2
PS		 436])
437
8828e5c7 438dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
064af421
BP		 439dnl
440dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
8828e5c7
BP		 441dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
442dnl <REGEX> translated to uppercase.
064af421
BP		 443AC_DEFUN([OVS_GREP_IFELSE], [
444 AC_MSG_CHECKING([whether $2 matches in $1])
7507ec48
JG		 445 if test -f $1; then
446 grep '$2' $1 >/dev/null 2>&1
447 status=$?
448 case $status in
997d327d 449 0)
7507ec48 450 AC_MSG_RESULT([yes])
8828e5c7 451 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
7507ec48 452 ;;
997d327d 453 1)
7507ec48
JG		 454 AC_MSG_RESULT([no])
455 $4
456 ;;
997d327d 457 *)
7507ec48
JG		 458 AC_MSG_ERROR([grep exited with status $status])
459 ;;
460 esac
461 else
462 AC_MSG_RESULT([file not found])
463 $4
464 fi
064af421
BP		 465])
466
13dd4a97
JS		 467dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
468dnl
469dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
470dnl structure definition. If this is successful, runs IF-MATCH, otherwise
471dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
472dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
473dnl translated to uppercase.
474AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
475 AC_MSG_CHECKING([whether $2 has member $3 in $1])
476 if test -f $1; then
83a27884 477 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
13dd4a97
JS		 478 status=$?
479 case $status in
480 0)
481 AC_MSG_RESULT([yes])
482 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
483 ;;
484 1)
485 AC_MSG_RESULT([no])
486 $5
487 ;;
488 *)
489 AC_MSG_ERROR([grep exited with status $status])
490 ;;
491 esac
492 else
493 AC_MSG_RESULT([file not found])
494 $5
495 fi
496])
497
71ce9edd
JR		 498dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
499dnl
500dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
501dnl the function signature starting from the line matching FUNCTION
502dnl and ending with the line containing the closing parenthesis. If
503dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
504dnl IF-MATCH is empty then it defines to
505dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
506dnl <REGEX> translated to uppercase.
507AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
508 AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
509 if test -f $1; then
510 awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
511 status=$?
512 case $status in
513 0)
514 AC_MSG_RESULT([yes])
515 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
516 ;;
517 1)
518 AC_MSG_RESULT([no])
519 $5
520 ;;
521 *)
522 AC_MSG_ERROR([grep exited with status $status])
523 ;;
524 esac
525 else
526 AC_MSG_RESULT([file not found])
527 $5
528 fi
529])
530
82b7e6d1
GR		 531dnl OVS_FIND_OP_PARAM_IFELSE(FILE, OP, REGEX, [IF-MATCH], [IF-NO-MATCH])
532dnl
533dnl Looks for OP in FILE. If it is found, greps for REGEX within the
534dnl OP definition. If this is successful, runs IF-MATCH, otherwise
535dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
536dnl OVS_DEFINE(HAVE_<OP>_WITH_<REGEX>), with <OP> and <REGEX>
537dnl translated to uppercase.
538AC_DEFUN([OVS_FIND_OP_PARAM_IFELSE], [
539 AC_MSG_CHECKING([whether $2 has member $3 in $1])
540 if test -f $1; then
541 awk '/$2[[ \t\n]]*\)\(/,/;/' $1 2>/dev/null | grep '$3' >/dev/null
542 status=$?
543 case $status in
544 0)
545 AC_MSG_RESULT([yes])
546 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
547 ;;
548 1)
549 AC_MSG_RESULT([no])
550 $5
551 ;;
552 *)
553 AC_MSG_ERROR([grep exited with status $status])
554 ;;
555 esac
556 else
557 AC_MSG_RESULT([file not found])
558 $5
559 fi
560])
561
064af421
BP		 562dnl OVS_DEFINE(NAME)
563dnl
564dnl Defines NAME to 1 in kcompat.h.
565AC_DEFUN([OVS_DEFINE], [
22bcc0e7 566 echo '#define $1 1' >> datapath/linux/kcompat.h.new
064af421
BP		 567])
568
e3438006 569dnl OVS_CHECK_LINUX_COMPAT
064af421 570dnl
8063e095 571dnl Runs various Autoconf checks on the Linux kernel source in
e3438006
BP		 572dnl the directory in $KBUILD.
573AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
22bcc0e7
JG		 574 rm -f datapath/linux/kcompat.h.new
575 mkdir -p datapath/linux
576 : > datapath/linux/kcompat.h.new
4aa13c0c 577
e23775f2
PS		 578 echo '#include <linux/version.h>
579#ifndef RHEL_RELEASE_CODE
580#define RHEL_RELEASE_CODE 0
581#define RHEL_RELEASE_VERSION(a, b) 0
582#endif' >> datapath/linux/kcompat.h.new
583
e3438006 584 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
25fb3596
JG		 585 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
586
db1dcb23
DB		 587 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6_get_cookie],
588 [OVS_DEFINE([HAVE_RT6_GET_COOKIE])])
589
e23775f2
PS		 590 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
591 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
5519e384
YHW		 592 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup_flow.*net],
593 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_FLOW_NET])])
e23775f2 594 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
5519e384 595 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup_flow])
e23775f2 596
e3438006 597 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
4303ec34 598 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
54125dd0 599 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
4aa13c0c 600
8aef057b 601 OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [static_branch_unlikely(],
6660a959 602 [OVS_DEFINE([HAVE_UPSTREAM_STATIC_KEY])])
8aef057b
YHW		 603 OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [DEFINE_STATIC_KEY_FALSE],
604 [OVS_DEFINE([HAVE_DEFINE_STATIC_KEY])])
6660a959 605
d923a695 606 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
e2f3178f 607 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
d923a695 608
e23775f2
PS		 609 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
610 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
611 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
d923a695 612 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
ec96e663 613 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
9feb5bda 614 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_hwaccel_clear_tag])
d923a695 615
e3438006 616 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
46d69d18 617 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
2ea82414
PS		 618 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
619 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
e23775f2
PS		 620 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
621 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
622
13dd4a97
JS		 623 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
624 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
39c0ff22
JS		 625 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
626 [OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
0374bcbe
EB		 627 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
628 [ip_do_fragment], [net],
629 [OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
0643a78b
PS		 630 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
631 [ip_local_out], [net],
632 [OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
633
cfda4537 634 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
0f09d6e3
JS		 635
636 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
637 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
06f1a61a 638 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
595e069a
JS		 639 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
640 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
8f00ece9
JS		 641 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
642 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
e0d45da3 643 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
ccd0a13b 644 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
91408ae0
JS		 645 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
646 [frags_work])
d1c390e6
JS		 647 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
648 [rwlock])
e0d45da3
JS		 649 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
650 [list_evictor])
38f45380 651 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
6ccf21ca
YHW		 652 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
653 [sub_frag_mem_limit], [struct.netns_frags],
654 [OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
655 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
656 [OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
401da7b9
JS		 657 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
658 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
8f00ece9 659
f2252c61
PS		 660 dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
661 dnl OVS does not really need ipv6 label field, but its presence signifies that
662 dnl the stack has all required ipv6 support.
663 dnl OVS also does not need dst_cache But this dependency allows us to write
664 dnl much cleaner code.
665
3259c4ff
PS		 666 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
667 [label],
668 [OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
669 [iptunnel_pull_offloads],
997d327d 670 [OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
e1ededf4
GR		 671 [OVS_GREP_IFELSE([$KSRC/include/net/erspan.h], [erspan_md2],
672 [OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])])
4aa13c0c 673
138df3e5
GR		 674 OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
675 [OVS_DEFINE([USE_BUILTIN_DST_CACHE])])
65590144
YHW		 676 OVS_GREP_IFELSE([$KSRC/include/net/mpls.h], [mpls_hdr],
677 [OVS_DEFINE([MPLS_HEADER_IS_L3])])
fdce83a3
PS		 678 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
679 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
aad7cb91 680 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
e3438006
BP		 681 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
682 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
683 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
3f506f07 684 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
42d5dd95 685 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
96b82f6d 686 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_gso_error_unwind])
42d5dd95 687 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
e23775f2 688 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
0a0d9095
PS		 689 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
690 [OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
f2252c61
PS		 691 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
692 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
e2e11c89 693 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_udp_tunnel_add])
d1890de5 694 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
8063e095
PS		 695 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
696 dnl So check type of tstats.
697 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
698 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
e23775f2
PS		 699 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
700 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
a0c9fedc 701 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_csum_hwoffload_help])
e23775f2
PS		 702 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
703 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
704 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
705 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
8ce37339 706 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
6ccf21ca
YHW		 707 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
708 [extended])
7efb1e09
PS		 709 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
710 [netdev_master_upper_dev_link], [upper_priv],
711 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
b7ab7316
YHW		 712 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
713 [netdev_master_upper_dev_link_rh],
714 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_RH])])
715
6c0bf091
JW		 716 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
717 [max_mtu])
39ca3383
YHW		 718 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops_extended],
719 [ndo_change_mtu], [OVS_DEFINE([HAVE_RHEL7_MAX_MTU])])
140c8971
PM		 720 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
721 [dev_change_flags], [extack],
722 [OVS_DEFINE([HAVE_DEV_CHANGE_FLAGS_TAKES_EXTACK])])
e23775f2
PS		 723
724 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
4fdec898
FW		 725 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state],
726 [struct net ], [OVS_DEFINE([HAVE_NF_HOOK_STATE_NET])])
e23775f2 727 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
cd7330d0
PS		 728 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
729 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
0643a78b
PS		 730 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
731 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
732 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
733 [owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
179fccce 734 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [NFPROTO_INET])
d42fb06d 735 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [CONFIG_NF_NAT_NEEDED])
179fccce 736
0643a78b 737
e4e04c3b 738 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
2b64e8fc 739 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
e2f3178f 740
6d9b6937
JR		 741 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
742 [nf_conn], [struct timer_list[[ \t]]*timeout],
743 [OVS_DEFINE([HAVE_NF_CONN_TIMER])])
744 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
745 [nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
746
71ce9edd
JR		 747 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
748 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
057772cf 749 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
71ce9edd
JR		 750 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
751 [nf_ct_get_tuplepr], [struct.net],
fa67f8e0 752 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
dfa791b2
FW		 753 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
754 [nf_ct_set])
56ec5593
JS		 755 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
756 [nf_ct_is_untracked])
c1d728db
YHW		 757 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
758 [nf_ct_invert_tuplepr])
ac9cd0d2
JS		 759 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
760 [nf_ct_zone_init])
eca4cde0
YS		 761 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_l3proto.h],
762 [net_ns_get])
459064e7
JS		 763 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
764 [nf_connlabels_get])
7f2ab8cd
JR		 765 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
766 [nf_connlabels_get], [int bit],
767 [OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
9f04eabe
JR		 768 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
769 [nf_conn_labels], [words])
0d330e42
JR		 770 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
771 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
fdec3c17 772 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_range2])
9ea96dce
YHW		 773 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_packet],
774 [OVS_DEFINE([HAVE_UPSTREAM_NF_NAT])])
0d330e42 775 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
74496432 776 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_count.h], [nf_conncount_gc_list],
4bfdefea
YS		 777 [OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_count.h],
778 [int nf_conncount_add],
779 [], [OVS_DEFINE([HAVE_UPSTREAM_NF_CONNCOUNT])])])
2fc8309b
YHW		 780 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_timeout.h], [nf_ct_set_timeout])
781 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_timeout.h], [struct nf_ct_timeout],
782 [OVS_DEFINE([HAVE_NF_CT_TIMEOUT])])
783 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_timeout.h],
784 [\(*nf_ct_timeout_find_get_hook\)], [net],
785 [OVS_DEFINE([HAVE_NF_CT_TIMEOUT_FIND_GET_HOOK_NET])])
057772cf 786
9048ab60
GR		 787 OVS_GREP_IFELSE([$KSRC/include/linux/random.h],
788 [prandom_u32[[\(]]],
789 [OVS_DEFINE([HAVE_PRANDOM_U32])])
f000c879 790 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
4aa13c0c 791
e23775f2
PS		 792 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
793 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
794 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
795 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
796 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
797
e3438006
BP		 798 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
799 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2 800 [rcu_read_lock_held])])
8fa52250 801 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
3d10a0c8 802 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [net_rwsem])
8b7cc752
YS		 803 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/rtnetlink.h],
804 [rtnl_create_link], [extack],
805 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_TAKES_EXTACK])])
efcae7df 806 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [nf_reset_ct])
997d327d 807
6a33828d
BP		 808 # Check for the proto_data_valid member in struct sk_buff. The [^@]
809 # is necessary because some versions of this header remove the
810 # member but retain the kerneldoc comment that describes it (which
811 # starts with @). The brackets must be doubled because of m4
812 # quoting rules.
e3438006 813 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 814 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
ccb75a28 815 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
e23775f2 816 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
f2252c61 817 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
c1eb2500 818 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
d23239a2 819 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
60c4904f 820 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
5640cbd8
JG		 821 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
822 [OVS_DEFINE([HAVE_U16_RXHASH])])
e3438006 823 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 824 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
997d327d 825 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 826 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 827 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
828 [skb_reset_tail_pointer])
e3438006 829 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
e3438006 830 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 831 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 832 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 833 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
da4bbeb7 834 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
0aa6fda7 835 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
d923a695 836 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 837 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
1edc458d 838 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
c253c2e3
MC		 839 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
840 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
e2f3178f 841 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
705e9260
PS		 842 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
843 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
75e93287
FL		 844 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
845 [OVS_DEFINE([HAVE_L4_RXHASH])])
5cce04b6 846 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
97894370 847 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
a27c454e 848 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
97894370 849 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
c6e13fcc 850 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
ea3acd7a 851 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
73daf51a 852 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
d3c313c1 853 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
0ace0a26 854 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_put_zero])
4aa13c0c 855
e3438006 856 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 857 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 858 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
859 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 860
e3438006
BP		 861 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
862 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 863
0d03e51c 864 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
1dba1690 865 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
0d03e51c 866
114fce23
SG		 867 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
868 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
14002a59 869 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
6233a1bd
TG		 870 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
871 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
c623ba49 872 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
13dd4a97
JS		 873 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
874 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
f1e9590e 875 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_validate_flags])
0643a78b
PS		 876 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
877 [genl_notify], [net],
878 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
879
13dd4a97
JS		 880
881 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
882 [genl_multicast_group], [id])
fdce83a3 883 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
13dd4a97 884
cc1d0dea 885 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
e23775f2 886 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
8abaa53c 887 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
e23775f2 888 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
2d3ef70b 889 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
a94ebc39
JS		 890 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
891 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
213e1f54
JS		 892 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
893 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
894
91b37647 895 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
e3438006 896 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 897 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
898 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
899 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
dd693f9b 900 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
e3438006 901 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
0fcc086d 902 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
09c33996 903 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_nest_start_noflag])
6dbd98e6
SH		 904 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
905 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
15702dc9
JB		 906 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
907 [nla_parse], [netlink_ext_ack],
908 [OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
4aa13c0c 909
c4e976db
JG		 910 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
911
1f649f1c 912 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
17e3889f 913 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
e23775f2 914 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
5c3f23fe 915 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
ca6da1b1 916 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
431488e6 917
aadd6ae9
JS		 918 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/dst_metadata.h],
919 [metadata_dst_alloc], [metadata_type])
920
09f27436
JG		 921 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
922
3174a818
TG		 923 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
924 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
f6a0c895 925 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
13dd4a97
JS		 926 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
927 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
928 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
e23775f2 929 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
06aeda48
PS		 930 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
931 [OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
d7e58913
PS		 932 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
933 [gro_receive])
e23775f2
PS		 934
935 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
f6a0c895
TG		 936 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
937 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
938 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
f285d3e7 939
b7ebebcd
PS		 940 OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
941 OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
21a719d6
FL		 942 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
943 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
c970aa4e
PS		 944 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
945 [udp_add_offload], [net],
946 [OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
802d12b6
GR		 947 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
948 [nf_defrag_ipv6_enable], [net],
949 [OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
bef862bc
GR		 950 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [family_list],
951 [OVS_DEFINE([HAVE_GENL_FAMILY_LIST])])
7f15e8dd
GR		 952 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
953 [needs_free_netdev],
954 [OVS_DEFINE([HAVE_NEEDS_FREE_NETDEV])])
14365643
GR		 955 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_dev], [cfg],
956 [OVS_DEFINE([HAVE_VXLAN_DEV_CFG])])
ac8e3c6d 957 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
35fc0638
GR		 958 [nf_conntrack_helper_put],
959 [OVS_DEFINE(HAVE_NF_CONNTRACK_HELPER_PUT)])
4c941202
YHW		 960 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
961 [nf_nat_helper_try_module_get])
962 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
963 [nf_nat_helper_put])
f90e29c9 964 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],[[[[:space:]]]SKB_GSO_UDP[[[:space:]]]],
ad283644 965 [OVS_DEFINE([HAVE_SKB_GSO_UDP])])
db1dcb23
DB		 966 OVS_GREP_IFELSE([$KSRC/include/net/dst.h],[DST_NOCACHE],
967 [OVS_DEFINE([HAVE_DST_NOCACHE])])
6b51641a
GR		 968 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_link_ops],
969 [extack],
970 [OVS_DEFINE([HAVE_EXT_ACK_IN_RTNL_LINKOPS])])
a5220693
GR		 971 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
972 [list],
973 [OVS_DEFINE([HAVE_LIST_IN_NF_HOOK_OPS])])
c0802634
EG		 974 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netfilter/nf_conntrack_common.h],
975 [IP_CT_UNTRACKED])
36d3520b
GR		 976 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
977 [netdev_master_upper_dev_link], [extack],
978 [OVS_DEFINE([HAVE_UPPER_DEV_LINK_EXTACK])])
a61fbfa4
GR		 979 OVS_GREP_IFELSE([$KSRC/include/linux/compiler_types.h],
980 [__LINUX_COMPILER_TYPES_H],
981 [OVS_DEFINE([HAVE_LINUX_COMPILER_TYPES_H])])
6deeb55a
AB		 982 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
983 [ktime_get_ts64],
984 [OVS_DEFINE([HAVE_KTIME_GET_TS64])])
b147f2e9
JB		 985 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h],
986 [EXPORT_SYMBOL_GPL(peernet2id_alloc)],
987 [OVS_DEFINE([HAVE_PEERNET2ID_ALLOC])])
1cb57039
AZ		 988 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
989 [ktime_get_ns],
990 [OVS_DEFINE([HAVE_KTIME_GET_NS])])
b3e647ca
GR		 991 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h],
992 frag_percpu_counter_batch[],
993 [OVS_DEFINE([HAVE_FRAG_PERCPU_COUNTER_BATCH])])
8e53509c
WT		 994 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
995 [null_compute_pseudo],
996 [OVS_DEFINE([HAVE_NULL_COMPUTE_PSEUDO])])
997 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
998 [__skb_checksum_convert],
999 [OVS_DEFINE([HAVE_SKB_CHECKSUM_CONVERT])])
1000 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
1001 [max_mtu],
1002 [OVS_DEFINE([HAVE_NET_DEVICE_MAX_MTU])])
8e53509c
WT		 1003 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip6_tunnel.h], [__ip6_tnl_parm],
1004 [erspan_ver],
1005 [OVS_DEFINE([HAVE_IP6_TNL_PARM_ERSPAN_VER])])
1006 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
1007 [SKB_GSO_IPXIP6],
1008 [OVS_DEFINE([HAVE_SKB_GSO_IPXIP6])])
1009 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ipv6.h],
1010 [ip6_make_flowlabel], [fl6],
1011 [OVS_DEFINE([HAVE_IP6_MAKE_FLOWLABEL_FL6])])
1012 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ipv6.h], [netns_sysctl_ipv6],
1013 [auto_flowlabels],
1014 [OVS_DEFINE([HAVE_NETNS_SYSCTL_IPV6_AUTO_FLOWLABELS])])
1015 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
1016 [netif_keep_dst],
1017 [OVS_DEFINE([HAVE_NETIF_KEEP_DST])])
1018 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
1019 [ndo_get_iflink],
1020 [OVS_DEFINE([HAVE_NDO_GET_IFLINK])])
1021 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
1022 [skb_set_inner_ipproto],
1023 [OVS_DEFINE([HAVE_SKB_SET_INNER_IPPROTO])])
1024 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
1025 [tunnel_encap_types],
1026 [OVS_DEFINE([HAVE_TUNNEL_ENCAP_TYPES])])
1027 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
1028 [IFLA_IPTUN_ENCAP_TYPE],
1029 [OVS_DEFINE([HAVE_IFLA_IPTUN_ENCAP_TYPE])])
1030 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
1031 [IFLA_IPTUN_COLLECT_METADATA],
1032 [OVS_DEFINE([HAVE_IFLA_IPTUN_COLLECT_METADATA])])
e1ededf4
GR		 1033 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
1034 [IFLA_GRE_ENCAP_DPORT])
1035 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
1036 [IFLA_GRE_COLLECT_METADATA])
1037 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
1038 [IFLA_GRE_IGNORE_DF])
1039 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
1040 [IFLA_GRE_FWMARK])
1041 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
1042 [IFLA_GRE_ERSPAN_INDEX])
1043 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
1044 [IFLA_GRE_ERSPAN_HWID])
436d36db
GR		 1045 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
1046 [IFLA_IPTUN_FWMARK])
10f24236
GR		 1047 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/skbuff.h], [sk_buff],
1048 [csum_valid],
1049 [OVS_DEFINE([HAVE_SKBUFF_CSUM_VALID])])
9feb5bda
MM		 1050 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/skbuff.h], [sk_buff],
1051 [vlan_present],
1052 [OVS_DEFINE([HAVE_SKBUFF_VLAN_PRESENT])])
10f24236
GR		 1053 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
1054 [skb_checksum_simple_validate])
44a629b5
GR		 1055 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
1056 [void.*ndo_get_stats64],
1057 [OVS_DEFINE([HAVE_VOID_NDO_GET_STATS64])])
7f63d830
YS		 1058 OVS_GREP_IFELSE([$KSRC/include/linux/timer.h], [init_timer_deferrable],
1059 [OVS_DEFINE([HAVE_INIT_TIMER_DEFERRABLE])])
3f3b76f9
GR		 1060 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip_tunnels.h],
1061 [ip_tunnel_info_opts_set], [flags],
1062 [OVS_DEFINE([HAVE_IP_TUNNEL_INFO_OPTS_SET_FLAGS])])
4a90b277
GR		 1063 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
1064 [rnd],
1065 [OVS_DEFINE([HAVE_INET_FRAGS_RND])])
f7246940
GS		 1066 OVS_GREP_IFELSE([$KSRC/include/linux/overflow.h], [__LINUX_OVERFLOW_H],
1067 [OVS_DEFINE([HAVE_OVERFLOW_H])])
8f6d230f
YS		 1068 OVS_GREP_IFELSE([$KSRC/include/linux/overflow.h], [struct_size],
1069 [OVS_DEFINE([HAVE_STRUCT_SIZE])])
f7246940
GS		 1070 OVS_GREP_IFELSE([$KSRC/include/linux/mm.h], [kvmalloc_array],
1071 [OVS_DEFINE([HAVE_KVMALLOC_ARRAY])])
1072 OVS_GREP_IFELSE([$KSRC/include/linux/mm.h], [kvmalloc_node],
1073 [OVS_DEFINE([HAVE_KVMALLOC_NODE])])
945d6d1c
YS		 1074 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_l3proto.h],
1075 [nf_conntrack_l3proto],
1076 [OVS_DEFINE([HAVE_NF_CONNTRACK_L3PROATO_H])])
4fdec898
FW		 1077 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_core.h],
1078 [nf_conntrack_in], [nf_hook_state],
1079 [OVS_DEFINE([HAVE_NF_CONNTRACK_IN_TAKES_NF_HOOK_STATE])])
7857a9b4
FW		 1080 OVS_GREP_IFELSE([$KSRC/include/net/ipv6_frag.h], [IP6_DEFRAG_CONNTRACK_IN],
1081 [OVS_DEFINE([HAVE_IPV6_FRAG_H])])
7685ce31
GF		 1082 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
1083 [nf_ct_helper_ext_add], [nf_conntrack_helper],
1084 [OVS_DEFINE([HAVE_NF_CT_HELPER_EXT_ADD_TAKES_HELPER])])
6d97adee
GR		 1085 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_calc_hlen],
1086 [OVS_DEFINE([HAVE_GRE_CALC_HLEN])])
1087 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [ip_gre_calc_hlen],
1088 [OVS_DEFINE([HAVE_IP_GRE_CALC_HLEN])])
4bfdefea
YS		 1089 OVS_GREP_IFELSE([$KSRC/include/linux/rbtree.h], [rb_link_node_rcu],
1090 [OVS_DEFINE([HAVE_RBTREE_RB_LINK_NODE_RCU])])
6634cc8a
GR		 1091 OVS_GREP_IFELSE([$KSRC/include/net/dst_ops.h], [bool confirm_neigh],
1092 [OVS_DEFINE([HAVE_DST_OPS_CONFIRM_NEIGH])])
f77d85b1
GR		 1093 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [fqdir],
1094 [OVS_DEFINE([HAVE_INET_FRAG_FQDIR])])
2ef0f1c2
JB		 1095 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h], [genl_ops],
1096 [policy],
1097 [OVS_DEFINE([HAVE_GENL_OPS_POLICY])])
6db0f72d
JB		 1098 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h],
1099 [nla_parse_deprecated_strict],
1100 [OVS_DEFINE([HAVE_NLA_PARSE_DEPRECATED_STRICT])])
82b7e6d1
GR		 1101 OVS_FIND_OP_PARAM_IFELSE([$KSRC/include/net/rtnetlink.h],
1102 [validate], [extack],
1103 [OVS_DEFINE([HAVE_RTNLOP_VALIDATE_WITH_EXTACK])])
21a719d6 1104
22bcc0e7
JG		 1105 if cmp -s datapath/linux/kcompat.h.new \
1106 datapath/linux/kcompat.h >/dev/null 2>&1; then
1107 rm datapath/linux/kcompat.h.new
064af421 1108 else
22bcc0e7 1109 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 1110 fi
1111])
1112
f6eb6b20 1113dnl Checks for net/if_dl.h.
d30e714c 1114dnl
d23fa2ed
YT		 1115dnl (We use this as a proxy for checking whether we're building on FreeBSD
1116dnl or NetBSD.)
9360d9b7
EM		 1117AC_DEFUN([OVS_CHECK_IF_DL],
1118 [AC_CHECK_HEADER([net/if_dl.h],
1119 [HAVE_IF_DL=yes],
1120 [HAVE_IF_DL=no])
1121 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
1122 if test "$HAVE_IF_DL" = yes; then
1123 AC_DEFINE([HAVE_IF_DL], [1],
1124 [Define to 1 if net/if_dl.h is available.])
d30e714c 1125
d23fa2ed 1126 # On these platforms we use libpcap to access network devices.
d30e714c 1127 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 1128 fi])
1129
e50097d2
BP		 1130dnl Checks for buggy strtok_r.
1131dnl
1132dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
1133dnl with optimization that can cause segfaults:
1134dnl
1135dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
1136AC_DEFUN([OVS_CHECK_STRTOK_R],
1137 [AC_CACHE_CHECK(
1138 [whether strtok_r macro segfaults on some inputs],
1139 [ovs_cv_strtok_r_bug],
1140 [AC_RUN_IFELSE(
1141 [AC_LANG_PROGRAM([#include <stdio.h>
1142 #include <string.h>
1143 ],
416e7132
BP		 1144 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
1145 /* Assume bug is present, because relatively minor
1146 changes in compiler settings (e.g. optimization
1147 level) can make it crop up. */
1148 return 1;
1149 #else
1150 char string[] = ":::";
e50097d2
BP		 1151 char *save_ptr = (char *) 0xc0ffee;
1152 char *token1, *token2;
1153 token1 = strtok_r(string, ":", &save_ptr);
1154 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 1155 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 1156 printf ("%s %s\n", token1, token2);
1157 return 0;
416e7132 1158 #endif
e50097d2
BP		 1159 ]])],
1160 [ovs_cv_strtok_r_bug=no],
1161 [ovs_cv_strtok_r_bug=yes],
1162 [ovs_cv_strtok_r_bug=yes])])
1163 if test $ovs_cv_strtok_r_bug = yes; then
1164 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
1165 [Define if strtok_r macro segfaults on some inputs])
1166 fi
1167])
1168
064af421
BP		 1169dnl ----------------------------------------------------------------------
1170dnl These macros are from GNU PSPP, with the following original license:
1171dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
1172dnl This file is free software; the Free Software Foundation
1173dnl gives unlimited permission to copy and/or distribute it,
1174dnl with or without modifications, as long as this notice is preserved.
1175
50194820 1176AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
726af752 1177 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
064af421
BP		 1178 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
1179 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 1180 dnl Include -Werror in the compiler options, because without -Werror
1181 dnl clang's GCC-compatible compiler driver does not return a failure
1182 dnl exit status even though it complains about options it does not
1183 dnl understand.
c2deac54
YT		 1184 dnl
1185 dnl Also, check stderr as gcc exits with status 0 for options
1186 dnl rejected at getopt level.
1187 dnl % touch /tmp/a.c
1188 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
1189 dnl gcc: unrecognized option '-Qunused-arguments'
1190 dnl 0
1191 dnl %
4c1e8cb9
BP		 1192 dnl
1193 dnl In addition, GCC does not complain about a -Wno-<foo> option that
1194 dnl it does not understand, unless it has another error to report, so
1195 dnl instead of testing for -Wno-<foo>, test for the positive version.
1196 CFLAGS="$CFLAGS $WERROR m4_bpatsubst([$1], [-Wno-], [-W])"
37f4615e
BP		 1197 AC_COMPILE_IFELSE(
1198 [AC_LANG_SOURCE([int x;])],
1199 [if test -s conftest.err && grep "unrecognized option" conftest.err
1200 then
1201 ovs_cv_name[]=no
1202 else
1203 ovs_cv_name[]=yes
1204 fi],
1205 [ovs_cv_name[]=no])
064af421
BP		 1206 CFLAGS="$ovs_save_CFLAGS"])
1207 if test $ovs_cv_name = yes; then
83f6c050 1208 m4_if([$2], [], [:], [$2])
064af421
BP		 1209 else
1210 m4_if([$3], [], [:], [$3])
1211 fi
1212])
1213
50194820
BP		 1214dnl OVS_CHECK_WERROR
1215dnl
1216dnl Check whether the C compiler accepts -Werror.
1217dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
1218AC_DEFUN([OVS_CHECK_WERROR],
1219 [WERROR=
1220 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
1221
1222dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
1223dnl Check whether the given C compiler OPTION is accepted.
1224dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
1225AC_DEFUN([OVS_CHECK_CC_OPTION],
1226 [AC_REQUIRE([OVS_CHECK_WERROR])
1227 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
1228
064af421
BP		 1229dnl OVS_ENABLE_OPTION([OPTION])
1230dnl Check whether the given C compiler OPTION is accepted.
d161c099 1231dnl If so, add it to WARNING_FLAGS.
064af421
BP		 1232dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
1233AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 1234 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
1235 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 1236
1237dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
1238dnl Check whether the given C compiler OPTION is accepted.
1239dnl If so, enable the given Automake CONDITIONAL.
1240
1241dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
1242AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
1243 [OVS_CHECK_CC_OPTION(
1244 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
1245 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 1246dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 1247
1248dnl Check for too-old XenServer.
1249AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
1250 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
1251 [if test -e /etc/redhat-release; then
1252 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
1253 fi
1254 if test -z "$ovs_cv_xsversion"; then
1255 ovs_cv_xsversion=none
1256 fi])
1257 case $ovs_cv_xsversion in
1258 none)
1259 ;;
1260
1261 [[1-9]][[0-9]]* | dnl XenServer 10 or later
1262 [[6-9]]* | dnl XenServer 6 or later
1263 5.[[7-9]]* | dnl XenServer 5.7 or later
1264 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
1265 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
1266 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
1267 ;;
1268
1269 *)
1270 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
1271 ;;
1272 esac])
29d935d6 1273
643c0c34
BP		 1274dnl OVS_CHECK_SPARSE_TARGET
1275dnl
1276dnl The "cgcc" script from "sparse" isn't very good at detecting the
1277dnl target for which the code is being built. This helps it out.
1278AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
1279 [AC_CACHE_CHECK(
1280 [target hint for cgcc],
1281 [ac_cv_sparse_target],
1282 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
1283 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
1284 [x86_64-*], [ac_cv_sparse_target=x86_64],
1285 [ac_cv_sparse_target=other])])
1286 AS_CASE([$ac_cv_sparse_target],
0cdd5b13
BP		 1287 [x86], [SPARSEFLAGS= CGCCFLAGS="-target=i86 -target=host_os_specs"],
1288 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS="-target=x86_64 -target=host_os_specs"],
643c0c34 1289 [SPARSEFLAGS= CGCCFLAGS=])
346c6538 1290
e5273084 1291 dnl Get the default defines for vector instructions from compiler to
346c6538
IM		 1292 dnl allow "sparse" correctly check the same code that will be built.
1293 dnl Required for checking DPDK headers.
1294 AC_MSG_CHECKING([vector options for cgcc])
1295 VECTOR=$($CC -dM -E - < /dev/null | grep -E "MMX|SSE|AVX" | \
1296 cut -c 9- | sed 's/ /=/' | sed 's/^/-D/' | tr '\n' ' ')
1297 AC_MSG_RESULT([$VECTOR])
1298 CGCCFLAGS="$CGCCFLAGS $VECTOR"
1299
643c0c34
BP		 1300 AC_SUBST([SPARSEFLAGS])
1301 AC_SUBST([CGCCFLAGS])])
1302
32e96ab7
AZ		 1303dnl OVS_SPARSE_EXTRA_INCLUDES
1304dnl
1305dnl The cgcc script from "sparse" does not search gcc's default
1306dnl search path. Get the default search path from GCC and pass
1307dnl them to sparse.
1308AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
1309 AC_SUBST([SPARSE_EXTRA_INCLUDES],
1310 [`$CC -v -E - </dev/null 2>&1 >/dev/null | sed -n -e '/^#include.*search.*starts.*here:/,/^End.*of.*search.*list\./s/^ \(.*\)/-I \1/p' |grep -v /usr/lib | grep -x -v '\-I /usr/include' | tr \\\n ' ' `] ))
1311
29d935d6
BP		 1312dnl OVS_ENABLE_SPARSE
1313AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 1314 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
32e96ab7 1315 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 1316 : ${SPARSE=sparse}
1317 AC_SUBST([SPARSE])
1318 AC_CONFIG_COMMANDS_PRE(
d4042a70
BP		 1319 [CC='$(if $(C:0=),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) $(SPARSE_WERROR) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])
1320
1321 AC_ARG_ENABLE(
1322 [sparse],
1323 [AC_HELP_STRING([--enable-sparse], [Run "sparse" by default])],
1324 [], [enable_sparse=no])
1325 AM_CONDITIONAL([ENABLE_SPARSE_BY_DEFAULT], [test $enable_sparse = yes])])
8a8cd0ac 1326
0eaaacac
FL		 1327dnl OVS_CTAGS_IDENTIFIERS
1328dnl
1329dnl ctags ignores symbols with extras identifiers. This builds a list of
1330dnl specially handled identifiers to be ignored.
1331AC_DEFUN([OVS_CTAGS_IDENTIFIERS],
1332 AC_SUBST([OVS_CTAGS_IDENTIFIERS_LIST],
c9990318 1333 [`printf %s '-I "'; sed -n 's/^#define \(OVS_[A-Z_]\+\)(\.\.\.)$/\1+/p' ${srcdir}/include/openvswitch/compiler.h | tr \\\n ' ' ; printf '"'`] ))
0eaaacac 1334
8a8cd0ac
BP		 1335dnl OVS_PTHREAD_SET_NAME
1336dnl
1337dnl This checks for three known variants of pthreads functions for setting
1338dnl the name of the current thread:
1339dnl
1340dnl glibc: int pthread_setname_np(pthread_t, const char *name);
1341dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
1342dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
1343dnl
1344dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
1345dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
1346dnl provide to it.
1347dnl
1348dnl This macro defines:
1349dnl
1350dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
1351dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
1352dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
1353AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
1354 [AC_CHECK_FUNCS([pthread_set_name_np])
1355 if test $ac_cv_func_pthread_set_name_np != yes; then
1356 AC_CACHE_CHECK(
1357 [for pthread_setname_np() variant],
1358 [ovs_cv_pthread_setname_np],
1359 [AC_LINK_IFELSE(
a0903134 1360 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac 1361 ], [pthread_setname_np(pthread_self(), "name");])],
a0903134 1362 [ovs_cv_pthread_setname_np=glibc],
8a8cd0ac 1363 [AC_LINK_IFELSE(
a0903134 1364 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac
BP		 1365], [pthread_setname_np(pthread_self(), "%s", "name");])],
1366 [ovs_cv_pthread_setname_np=netbsd],
a0903134 1367 [ovs_cv_pthread_setname_np=none])])])
8a8cd0ac
BP		 1368 case $ovs_cv_pthread_setname_np in # (
1369 glibc)
a0903134
YT		 1370 AC_DEFINE(
1371 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
1372 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
1373 ;; # (
8a8cd0ac 1374 netbsd)
a0903134
YT		 1375 AC_DEFINE(
1376 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
1377 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
1378 ;;
8a8cd0ac
BP		 1379 esac
1380 fi])
5020f5f0
BP		 1381
1382dnl OVS_CHECK_LINUX_HOST.
1383dnl
1384dnl Checks whether we're building for a Linux host, based on the presence of
1385dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
1386dnl LINUX based on the result.
1387AC_DEFUN([OVS_CHECK_LINUX_HOST],
1388 [AC_CACHE_CHECK(
1389 [whether __linux__ is defined],
1390 [ovs_cv_linux],
1391 [AC_COMPILE_IFELSE(
1392 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
1393 [ovs_cv_linux=true],
1394 [ovs_cv_linux=false])])
1395 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
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