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OVS: remove use of VLAN_TAG_PRESENT
[mirror_ovs.git] / acinclude.m4
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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
3afcde43 153 if test "$version" -ge 4; then
d58b59c1 154 if test "$version" = 4 && test "$patchlevel" -le 20; then
3afcde43 155 : # Linux 4.x
d76aabea 156 else
d58b59c1 157 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.20.x is not supported (please refer to the FAQ for advice)])
d76aabea 158 fi
8063e095 159 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
3afcde43 160 : # Linux 3.x
71fe9970 161 else
8063e095 162 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
064af421 163 fi
2520f452
IY		 164 if (test ! -e "$KBUILD"/include/linux/version.h && \
165 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
e3438006
BP		 166 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
167 test ! -e "$KBUILD"/include/generated/autoconf.h); then
a0903134 168 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
064af421 169 fi
e3438006 170 OVS_CHECK_LINUX_COMPAT
064af421 171 fi
e3438006 172 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
064af421
BP		 173])
174
1dc0da67
PB		 175dnl OVS_CHECK_LINUX_TC
176dnl
177dnl Configure Linux tc compat.
178AC_DEFUN([OVS_CHECK_LINUX_TC], [
179 AC_COMPILE_IFELSE([
180 AC_LANG_PROGRAM([#include <linux/pkt_cls.h>], [
dd83253e 181 int x = TCA_FLOWER_KEY_ENC_IP_TTL_MASK;
1dc0da67 182 ])],
dd83253e
OG		 183 [AC_DEFINE([HAVE_TCA_FLOWER_KEY_ENC_IP_TTL_MASK], [1],
184 [Define to 1 if TCA_FLOWER_KEY_ENC_IP_TTL_MASK is available.])])
1dc0da67
PB		 185
186 AC_COMPILE_IFELSE([
187 AC_LANG_PROGRAM([#include <linux/tc_act/tc_vlan.h>], [
188 int x = TCA_VLAN_PUSH_VLAN_PRIORITY;
189 ])],
190 [AC_DEFINE([HAVE_TCA_VLAN_PUSH_VLAN_PRIORITY], [1],
dd83253e 191 [Define to 1 if TCA_VLAN_PUSH_VLAN_PRIORITY is available.])])
1dc0da67
PB		 192
193 AC_COMPILE_IFELSE([
194 AC_LANG_PROGRAM([#include <linux/tc_act/tc_tunnel_key.h>], [
4b12e454 195 int x = TCA_TUNNEL_KEY_ENC_TTL;
1dc0da67 196 ])],
4b12e454
OG		 197 [AC_DEFINE([HAVE_TCA_TUNNEL_KEY_ENC_TTL], [1],
198 [Define to 1 if TCA_TUNNEL_KEY_ENC_TTL is available.])])
e5b1657e
PB		 199
200 AC_COMPILE_IFELSE([
201 AC_LANG_PROGRAM([#include <linux/tc_act/tc_pedit.h>], [
202 int x = TCA_PEDIT_KEY_EX_HDR_TYPE_UDP;
203 ])],
204 [AC_DEFINE([HAVE_TCA_PEDIT_KEY_EX_HDR_TYPE_UDP], [1],
dd83253e 205 [Define to 1 if TCA_PEDIT_KEY_EX_HDR_TYPE_UDP is available.])])
7808b2b9
JH		 206
207 AC_COMPILE_IFELSE([
208 AC_LANG_PROGRAM([#include <linux/tc_act/tc_skbedit.h>], [
209 int x = TCA_SKBEDIT_FLAGS;
210 ])],
211 [AC_DEFINE([HAVE_TCA_SKBEDIT_FLAGS], [1],
212 [Define to 1 if TCA_SKBEDIT_FLAGS is available.])])
1dc0da67
PB		 213])
214
8c7130da
AC		 215dnl OVS_CHECK_LINUX_SCTP_CT
216dnl
217dnl Checks for kernels which need additional SCTP state
218AC_DEFUN([OVS_CHECK_LINUX_SCTP_CT], [
219 AC_COMPILE_IFELSE([
220 AC_LANG_PROGRAM([#include <linux/netfilter/nfnetlink.h>
221#include <linux/netfilter/nfnetlink_conntrack.h>
222#include <linux/netfilter/nf_conntrack_common.h>
223#include <linux/netfilter/nf_conntrack_sctp.h>], [
224 int x = SCTP_CONNTRACK_HEARTBEAT_SENT;
225 ])],
226 [AC_DEFINE([HAVE_SCTP_CONNTRACK_HEARTBEATS], [1],
227 [Define to 1 if SCTP_CONNTRACK_HEARTBEAT_SENT is available.])])
228])
229
f0d1ead8
IM		 230dnl OVS_FIND_DEPENDENCY(FUNCTION, SEARCH_LIBS, NAME_TO_PRINT)
231dnl
232dnl Check for a function in a library list.
233AC_DEFUN([OVS_FIND_DEPENDENCY], [
234 AC_SEARCH_LIBS([$1], [$2], [], [
235 AC_MSG_ERROR([unable to find $3, install the dependency package])
236 ])
237])
238
8a9562d2
PS		 239dnl OVS_CHECK_DPDK
240dnl
241dnl Configure DPDK source tree
242AC_DEFUN([OVS_CHECK_DPDK], [
243 AC_ARG_WITH([dpdk],
244 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
4c16ee48
MV		 245 [Specify the DPDK build directory])],
246 [have_dpdk=true])
8a9562d2 247
40b5ea86 248 AC_MSG_CHECKING([whether dpdk datapath is enabled])
4c16ee48 249 if test "$have_dpdk" != true || test "$with_dpdk" = no; then
40b5ea86
BB		 250 AC_MSG_RESULT([no])
251 DPDKLIB_FOUND=false
252 else
253 AC_MSG_RESULT([yes])
254 case "$with_dpdk" in
255 yes)
256 DPDK_AUTO_DISCOVER="true"
5b5aa2d8
CE		 257 PKG_CHECK_MODULES_STATIC([DPDK], [libdpdk], [
258 DPDK_INCLUDE="$DPDK_CFLAGS"
259 DPDK_LIB="$DPDK_LIBS"], [
260 DPDK_INCLUDE="-I/usr/local/include/dpdk -I/usr/include/dpdk"
261 DPDK_LIB="-ldpdk"])
40b5ea86
BB		 262 ;;
263 *)
264 DPDK_AUTO_DISCOVER="false"
96195c09 265 DPDK_INCLUDE_PATH="$with_dpdk/include"
40b5ea86
BB		 266 # If 'with_dpdk' is passed install directory, point to headers
267 # installed in $DESTDIR/$prefix/include/dpdk
96195c09
CE		 268 if test -e "$DPDK_INCLUDE_PATH/rte_config.h"; then
269 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH"
270 elif test -e "$DPDK_INCLUDE_PATH/dpdk/rte_config.h"; then
271 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH/dpdk"
214ac6d4 272 fi
40b5ea86 273 DPDK_LIB_DIR="$with_dpdk/lib"
5b5aa2d8 274 DPDK_LIB="-ldpdk"
40b5ea86
BB		 275 ;;
276 esac
8a9562d2 277
95626395
TG		 278 ovs_save_CFLAGS="$CFLAGS"
279 ovs_save_LDFLAGS="$LDFLAGS"
96195c09 280 CFLAGS="$CFLAGS $DPDK_INCLUDE"
40b5ea86
BB		 281 if test "$DPDK_AUTO_DISCOVER" = "false"; then
282 LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
283 fi
284
865cee2b
IM		 285 AC_CHECK_HEADERS([rte_config.h], [], [
286 AC_MSG_ERROR([unable to find rte_config.h in $with_dpdk])
287 ], [AC_INCLUDES_DEFAULT])
288
f0d1ead8
IM		 289 AC_CHECK_DECLS([RTE_LIBRTE_VHOST_NUMA, RTE_EAL_NUMA_AWARE_HUGEPAGES], [
290 OVS_FIND_DEPENDENCY([get_mempolicy], [numa], [libnuma])
291 ], [], [[#include <rte_config.h>]])
4b88d678 292
f0d1ead8
IM		 293 AC_CHECK_DECL([RTE_LIBRTE_VHOST_NUMA], [
294 AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])
295 ], [], [[#include <rte_config.h>]])
fc3b425f 296
f0d1ead8
IM		 297 AC_CHECK_DECL([RTE_LIBRTE_PMD_PCAP], [
298 OVS_FIND_DEPENDENCY([pcap_dump], [pcap], [libpcap])
299 AC_CHECK_DECL([RTE_LIBRTE_PDUMP], [
300 AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])
301 ], [], [[#include <rte_config.h>]])
302 ], [], [[#include <rte_config.h>]])
939bad9a 303
f0d1ead8
IM		 304 AC_CHECK_DECL([RTE_LIBRTE_MLX5_PMD], [dnl found
305 OVS_FIND_DEPENDENCY([mnl_attr_put], [mnl], [libmnl])
306 AC_CHECK_DECL([RTE_LIBRTE_MLX5_DLOPEN_DEPS], [], [dnl not found
307 OVS_FIND_DEPENDENCY([mlx5dv_create_wq], [mlx5], [libmlx5])
308 OVS_FIND_DEPENDENCY([verbs_init_cq], [ibverbs], [libibverbs])
309 ], [[#include <rte_config.h>]])
310 ], [], [[#include <rte_config.h>]])
84844e3f 311
f0d1ead8
IM		 312 AC_CHECK_DECL([RTE_LIBRTE_MLX4_PMD], [dnl found
313 AC_CHECK_DECL([RTE_LIBRTE_MLX4_DLOPEN_DEPS], [], [dnl not found
314 OVS_FIND_DEPENDENCY([mlx4dv_init_obj], [mlx4], [libmlx4])
315 OVS_FIND_DEPENDENCY([verbs_init_cq], [ibverbs], [libibverbs])
316 ], [[#include <rte_config.h>]])
317 ], [], [[#include <rte_config.h>]])
939bad9a 318
e2f37511
IM		 319 # DPDK uses dlopen to load plugins.
320 OVS_FIND_DEPENDENCY([dlopen], [dl], [libdl])
321
322 AC_MSG_CHECKING([whether linking with dpdk works])
323 LIBS="$DPDK_LIB $LIBS"
324 AC_LINK_IFELSE(
325 [AC_LANG_PROGRAM([#include <rte_config.h>
326 #include <rte_eal.h>],
327 [int rte_argc; char ** rte_argv;
328 rte_eal_init(rte_argc, rte_argv);])],
329 [AC_MSG_RESULT([yes])
330 DPDKLIB_FOUND=true],
331 [AC_MSG_RESULT([no])
332 if test "$DPDK_AUTO_DISCOVER" = "true"; then
333 AC_MSG_ERROR(m4_normalize([
334 Could not find DPDK library in default search path, Use --with-dpdk
335 to specify the DPDK library installed in non-standard location]))
336 else
337 AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
338 fi
339 ])
c1223b11 340
95626395
TG		 341 CFLAGS="$ovs_save_CFLAGS"
342 LDFLAGS="$ovs_save_LDFLAGS"
40b5ea86
BB		 343 if test "$DPDK_AUTO_DISCOVER" = "false"; then
344 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
345 fi
96195c09 346 OVS_CFLAGS="$OVS_CFLAGS $DPDK_INCLUDE"
ab2a3154 347 OVS_ENABLE_OPTION([-mssse3])
8a9562d2 348
3c94676c 349 # DPDK pmd drivers are not linked unless --whole-archive is used.
d7310583
DDP		 350 #
351 # This happens because the rest of the DPDK code doesn't use any symbol in
352 # the pmd driver objects, and the drivers register themselves using an
353 # __attribute__((constructor)) function.
354 #
355 # These options are specified inside a single -Wl directive to prevent
356 # autotools from reordering them.
5b5aa2d8
CE		 357 #
358 # OTOH newer versions of dpdk pkg-config (generated with Meson)
359 # will already have flagged just the right set of libs with
360 # --whole-archive - in those cases do not wrap it once more.
361 case "$DPDK_LIB" in
362 *whole-archive*) DPDK_vswitchd_LDFLAGS=$DPDK_LIB;;
363 *) DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
364 esac
9475dfeb 365 AC_SUBST([DPDK_vswitchd_LDFLAGS])
8a9562d2 366 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
8a9562d2
PS		 367 fi
368
40b5ea86 369 AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
8a9562d2
PS		 370])
371
8828e5c7 372dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
064af421
BP		 373dnl
374dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
8828e5c7
BP		 375dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
376dnl <REGEX> translated to uppercase.
064af421
BP		 377AC_DEFUN([OVS_GREP_IFELSE], [
378 AC_MSG_CHECKING([whether $2 matches in $1])
7507ec48
JG		 379 if test -f $1; then
380 grep '$2' $1 >/dev/null 2>&1
381 status=$?
382 case $status in
997d327d 383 0)
7507ec48 384 AC_MSG_RESULT([yes])
8828e5c7 385 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
7507ec48 386 ;;
997d327d 387 1)
7507ec48
JG		 388 AC_MSG_RESULT([no])
389 $4
390 ;;
997d327d 391 *)
7507ec48
JG		 392 AC_MSG_ERROR([grep exited with status $status])
393 ;;
394 esac
395 else
396 AC_MSG_RESULT([file not found])
397 $4
398 fi
064af421
BP		 399])
400
13dd4a97
JS		 401dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
402dnl
403dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
404dnl structure definition. If this is successful, runs IF-MATCH, otherwise
405dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
406dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
407dnl translated to uppercase.
408AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
409 AC_MSG_CHECKING([whether $2 has member $3 in $1])
410 if test -f $1; then
83a27884 411 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
13dd4a97
JS		 412 status=$?
413 case $status in
414 0)
415 AC_MSG_RESULT([yes])
416 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
417 ;;
418 1)
419 AC_MSG_RESULT([no])
420 $5
421 ;;
422 *)
423 AC_MSG_ERROR([grep exited with status $status])
424 ;;
425 esac
426 else
427 AC_MSG_RESULT([file not found])
428 $5
429 fi
430])
431
71ce9edd
JR		 432dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
433dnl
434dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
435dnl the function signature starting from the line matching FUNCTION
436dnl and ending with the line containing the closing parenthesis. If
437dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
438dnl IF-MATCH is empty then it defines to
439dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
440dnl <REGEX> translated to uppercase.
441AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
442 AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
443 if test -f $1; then
444 awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
445 status=$?
446 case $status in
447 0)
448 AC_MSG_RESULT([yes])
449 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
450 ;;
451 1)
452 AC_MSG_RESULT([no])
453 $5
454 ;;
455 *)
456 AC_MSG_ERROR([grep exited with status $status])
457 ;;
458 esac
459 else
460 AC_MSG_RESULT([file not found])
461 $5
462 fi
463])
464
064af421
BP		 465dnl OVS_DEFINE(NAME)
466dnl
467dnl Defines NAME to 1 in kcompat.h.
468AC_DEFUN([OVS_DEFINE], [
22bcc0e7 469 echo '#define $1 1' >> datapath/linux/kcompat.h.new
064af421
BP		 470])
471
e3438006 472dnl OVS_CHECK_LINUX_COMPAT
064af421 473dnl
8063e095 474dnl Runs various Autoconf checks on the Linux kernel source in
e3438006
BP		 475dnl the directory in $KBUILD.
476AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
22bcc0e7
JG		 477 rm -f datapath/linux/kcompat.h.new
478 mkdir -p datapath/linux
479 : > datapath/linux/kcompat.h.new
4aa13c0c 480
e23775f2
PS		 481 echo '#include <linux/version.h>
482#ifndef RHEL_RELEASE_CODE
483#define RHEL_RELEASE_CODE 0
484#define RHEL_RELEASE_VERSION(a, b) 0
485#endif' >> datapath/linux/kcompat.h.new
486
e3438006 487 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
25fb3596
JG		 488 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
489
db1dcb23
DB		 490 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6_get_cookie],
491 [OVS_DEFINE([HAVE_RT6_GET_COOKIE])])
492
e23775f2
PS		 493 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
494 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
495 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
496
e3438006 497 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
4303ec34 498 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
54125dd0 499 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
4aa13c0c 500
8aef057b 501 OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [static_branch_unlikely(],
6660a959 502 [OVS_DEFINE([HAVE_UPSTREAM_STATIC_KEY])])
8aef057b
YHW		 503 OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [DEFINE_STATIC_KEY_FALSE],
504 [OVS_DEFINE([HAVE_DEFINE_STATIC_KEY])])
6660a959 505
d923a695 506 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
e2f3178f 507 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
d923a695 508
e23775f2
PS		 509 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
510 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
511 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
d923a695 512 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
ec96e663 513 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
9feb5bda 514 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_hwaccel_clear_tag])
d923a695 515
e3438006 516 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
46d69d18 517 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
2ea82414
PS		 518 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
519 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
e23775f2
PS		 520 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
521 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
522
13dd4a97
JS		 523 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
524 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
39c0ff22
JS		 525 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
526 [OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
0374bcbe
EB		 527 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
528 [ip_do_fragment], [net],
529 [OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
0643a78b
PS		 530 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
531 [ip_local_out], [net],
532 [OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
533
cfda4537 534 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
0f09d6e3
JS		 535
536 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
537 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
06f1a61a 538 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
595e069a
JS		 539 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
540 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
8f00ece9
JS		 541 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
542 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
e0d45da3 543 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
ccd0a13b 544 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
91408ae0
JS		 545 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
546 [frags_work])
d1c390e6
JS		 547 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
548 [rwlock])
e0d45da3
JS		 549 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
550 [list_evictor])
38f45380 551 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
6ccf21ca
YHW		 552 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
553 [sub_frag_mem_limit], [struct.netns_frags],
554 [OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
555 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
556 [OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
401da7b9
JS		 557 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
558 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
8f00ece9 559
f2252c61
PS		 560 dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
561 dnl OVS does not really need ipv6 label field, but its presence signifies that
562 dnl the stack has all required ipv6 support.
563 dnl OVS also does not need dst_cache But this dependency allows us to write
564 dnl much cleaner code.
565
3259c4ff
PS		 566 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
567 [label],
568 [OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
569 [iptunnel_pull_offloads],
997d327d 570 [OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
e1ededf4
GR		 571 [OVS_GREP_IFELSE([$KSRC/include/net/erspan.h], [erspan_md2],
572 [OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])])
4aa13c0c 573
138df3e5
GR		 574 OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
575 [OVS_DEFINE([USE_BUILTIN_DST_CACHE])])
65590144
YHW		 576 OVS_GREP_IFELSE([$KSRC/include/net/mpls.h], [mpls_hdr],
577 [OVS_DEFINE([MPLS_HEADER_IS_L3])])
fdce83a3
PS		 578 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
579 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
aad7cb91 580 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
e3438006
BP		 581 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
582 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
583 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
3f506f07 584 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
42d5dd95 585 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
96b82f6d 586 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_gso_error_unwind])
42d5dd95 587 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
e23775f2 588 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
0a0d9095
PS		 589 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
590 [OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
f2252c61
PS		 591 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
592 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
e2e11c89 593 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_udp_tunnel_add])
d1890de5 594 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
8063e095
PS		 595 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
596 dnl So check type of tstats.
597 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
598 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
e23775f2
PS		 599 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
600 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
a0c9fedc 601 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_csum_hwoffload_help])
e23775f2
PS		 602 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
603 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
604 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
605 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
8ce37339 606 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
6ccf21ca
YHW		 607 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
608 [extended])
7efb1e09
PS		 609 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
610 [netdev_master_upper_dev_link], [upper_priv],
611 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
b7ab7316
YHW		 612 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
613 [netdev_master_upper_dev_link_rh],
614 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_RH])])
615
6c0bf091
JW		 616 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
617 [max_mtu])
39ca3383
YHW		 618 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops_extended],
619 [ndo_change_mtu], [OVS_DEFINE([HAVE_RHEL7_MAX_MTU])])
e23775f2
PS		 620
621 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
4fdec898
FW		 622 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state],
623 [struct net ], [OVS_DEFINE([HAVE_NF_HOOK_STATE_NET])])
e23775f2 624 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
cd7330d0
PS		 625 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
626 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
0643a78b
PS		 627 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
628 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
629 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
630 [owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
179fccce
YHW		 631 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [NFPROTO_INET])
632
0643a78b 633
e4e04c3b 634 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
2b64e8fc 635 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
e2f3178f 636
6d9b6937
JR		 637 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
638 [nf_conn], [struct timer_list[[ \t]]*timeout],
639 [OVS_DEFINE([HAVE_NF_CONN_TIMER])])
640 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
641 [nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
642
71ce9edd
JR		 643 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
644 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
057772cf 645 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
71ce9edd
JR		 646 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
647 [nf_ct_get_tuplepr], [struct.net],
fa67f8e0 648 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
dfa791b2
FW		 649 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
650 [nf_ct_set])
56ec5593
JS		 651 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
652 [nf_ct_is_untracked])
ac9cd0d2
JS		 653 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
654 [nf_ct_zone_init])
eca4cde0
YS		 655 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_l3proto.h],
656 [net_ns_get])
459064e7
JS		 657 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
658 [nf_connlabels_get])
7f2ab8cd
JR		 659 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
660 [nf_connlabels_get], [int bit],
661 [OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
9f04eabe
JR		 662 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
663 [nf_conn_labels], [words])
0d330e42
JR		 664 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
665 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
fdec3c17 666 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_range2])
0d330e42 667 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
74496432
YHW		 668 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_count.h], [nf_conncount_gc_list],
669 [OVS_DEFINE([HAVE_UPSTREAM_NF_CONNCOUNT])])
057772cf 670
e2f3178f 671 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
f000c879 672 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
4aa13c0c 673
e23775f2
PS		 674 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
675 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
676 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
677 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
678 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
679
e3438006
BP		 680 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
681 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2 682 [rcu_read_lock_held])])
8fa52250 683 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
3d10a0c8 684 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [net_rwsem])
8b7cc752
YS		 685 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/rtnetlink.h],
686 [rtnl_create_link], [extack],
687 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_TAKES_EXTACK])])
997d327d 688
6a33828d
BP		 689 # Check for the proto_data_valid member in struct sk_buff. The [^@]
690 # is necessary because some versions of this header remove the
691 # member but retain the kerneldoc comment that describes it (which
692 # starts with @). The brackets must be doubled because of m4
693 # quoting rules.
e3438006 694 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 695 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
ccb75a28 696 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
e23775f2 697 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
f2252c61 698 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
c1eb2500 699 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
d23239a2 700 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
60c4904f 701 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
5640cbd8
JG		 702 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
703 [OVS_DEFINE([HAVE_U16_RXHASH])])
e3438006 704 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 705 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
997d327d 706 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 707 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 708 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
709 [skb_reset_tail_pointer])
e3438006 710 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
e3438006 711 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 712 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 713 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 714 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
da4bbeb7 715 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
0aa6fda7 716 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
d923a695 717 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 718 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
1edc458d 719 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
c253c2e3
MC		 720 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
721 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
e2f3178f 722 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
705e9260
PS		 723 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
724 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
75e93287
FL		 725 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
726 [OVS_DEFINE([HAVE_L4_RXHASH])])
5cce04b6 727 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
97894370 728 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
a27c454e 729 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
97894370 730 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
c6e13fcc 731 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
ea3acd7a 732 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
73daf51a 733 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
d3c313c1 734 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
0ace0a26 735 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_put_zero])
4aa13c0c 736
e3438006 737 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 738 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 739 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 740 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 741 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
742 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 743
e3438006
BP		 744 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
745 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 746
0d03e51c 747 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
1dba1690 748 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
0d03e51c 749
114fce23
SG		 750 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
751 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
14002a59 752 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
6233a1bd
TG		 753 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
754 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
c623ba49 755 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
13dd4a97
JS		 756 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
757 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
0643a78b
PS		 758 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
759 [genl_notify], [net],
760 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
761
13dd4a97
JS		 762
763 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
764 [genl_multicast_group], [id])
fdce83a3 765 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
13dd4a97 766
cc1d0dea 767 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
e23775f2 768 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
8abaa53c 769 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
e23775f2 770 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
2d3ef70b 771 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
a94ebc39
JS		 772 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
773 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
213e1f54
JS		 774 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
775 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
776
91b37647 777 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
e3438006 778 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 779 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
780 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
781 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
dd693f9b 782 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
e3438006 783 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
0fcc086d 784 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
6dbd98e6
SH		 785 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
786 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
15702dc9
JB		 787 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
788 [nla_parse], [netlink_ext_ack],
789 [OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
4aa13c0c 790
c4e976db
JG		 791 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
792
e3438006 793 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6 794 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
1f649f1c 795 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
17e3889f 796 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
e23775f2 797 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
5c3f23fe 798 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
ca6da1b1 799 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
431488e6 800
aadd6ae9
JS		 801 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/dst_metadata.h],
802 [metadata_dst_alloc], [metadata_type])
803
09f27436
JG		 804 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
805
3174a818
TG		 806 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
807 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
f6a0c895 808 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
13dd4a97
JS		 809 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
810 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
811 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
e23775f2 812 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
06aeda48
PS		 813 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
814 [OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
d7e58913
PS		 815 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
816 [gro_receive])
e23775f2
PS		 817
818 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
f6a0c895
TG		 819 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
820 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
821 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
f285d3e7 822
b7ebebcd
PS		 823 OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
824 OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
21a719d6
FL		 825 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
826 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
c970aa4e
PS		 827 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
828 [udp_add_offload], [net],
829 [OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
802d12b6
GR		 830 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
831 [nf_defrag_ipv6_enable], [net],
832 [OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
bef862bc
GR		 833 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [family_list],
834 [OVS_DEFINE([HAVE_GENL_FAMILY_LIST])])
7f15e8dd
GR		 835 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
836 [needs_free_netdev],
837 [OVS_DEFINE([HAVE_NEEDS_FREE_NETDEV])])
14365643
GR		 838 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_dev], [cfg],
839 [OVS_DEFINE([HAVE_VXLAN_DEV_CFG])])
ac8e3c6d 840 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
35fc0638
GR		 841 [nf_conntrack_helper_put],
842 [OVS_DEFINE(HAVE_NF_CONNTRACK_HELPER_PUT)])
f90e29c9 843 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],[[[[:space:]]]SKB_GSO_UDP[[[:space:]]]],
ad283644 844 [OVS_DEFINE([HAVE_SKB_GSO_UDP])])
db1dcb23
DB		 845 OVS_GREP_IFELSE([$KSRC/include/net/dst.h],[DST_NOCACHE],
846 [OVS_DEFINE([HAVE_DST_NOCACHE])])
6b51641a
GR		 847 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_link_ops],
848 [extack],
849 [OVS_DEFINE([HAVE_EXT_ACK_IN_RTNL_LINKOPS])])
a5220693
GR		 850 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
851 [list],
852 [OVS_DEFINE([HAVE_LIST_IN_NF_HOOK_OPS])])
c0802634
EG		 853 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netfilter/nf_conntrack_common.h],
854 [IP_CT_UNTRACKED])
36d3520b
GR		 855 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
856 [netdev_master_upper_dev_link], [extack],
857 [OVS_DEFINE([HAVE_UPPER_DEV_LINK_EXTACK])])
a61fbfa4
GR		 858 OVS_GREP_IFELSE([$KSRC/include/linux/compiler_types.h],
859 [__LINUX_COMPILER_TYPES_H],
860 [OVS_DEFINE([HAVE_LINUX_COMPILER_TYPES_H])])
6deeb55a
AB		 861 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
862 [ktime_get_ts64],
863 [OVS_DEFINE([HAVE_KTIME_GET_TS64])])
b147f2e9
JB		 864 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h],
865 [EXPORT_SYMBOL_GPL(peernet2id_alloc)],
866 [OVS_DEFINE([HAVE_PEERNET2ID_ALLOC])])
1cb57039
AZ		 867 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
868 [ktime_get_ns],
869 [OVS_DEFINE([HAVE_KTIME_GET_NS])])
b3e647ca
GR		 870 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h],
871 frag_percpu_counter_batch[],
872 [OVS_DEFINE([HAVE_FRAG_PERCPU_COUNTER_BATCH])])
8e53509c
WT		 873 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
874 [null_compute_pseudo],
875 [OVS_DEFINE([HAVE_NULL_COMPUTE_PSEUDO])])
876 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
877 [__skb_checksum_convert],
878 [OVS_DEFINE([HAVE_SKB_CHECKSUM_CONVERT])])
879 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
880 [max_mtu],
881 [OVS_DEFINE([HAVE_NET_DEVICE_MAX_MTU])])
8e53509c
WT		 882 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip6_tunnel.h], [__ip6_tnl_parm],
883 [erspan_ver],
884 [OVS_DEFINE([HAVE_IP6_TNL_PARM_ERSPAN_VER])])
885 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
886 [SKB_GSO_IPXIP6],
887 [OVS_DEFINE([HAVE_SKB_GSO_IPXIP6])])
888 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ipv6.h],
889 [ip6_make_flowlabel], [fl6],
890 [OVS_DEFINE([HAVE_IP6_MAKE_FLOWLABEL_FL6])])
891 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ipv6.h], [netns_sysctl_ipv6],
892 [auto_flowlabels],
893 [OVS_DEFINE([HAVE_NETNS_SYSCTL_IPV6_AUTO_FLOWLABELS])])
894 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
895 [netif_keep_dst],
896 [OVS_DEFINE([HAVE_NETIF_KEEP_DST])])
897 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
898 [ndo_get_iflink],
899 [OVS_DEFINE([HAVE_NDO_GET_IFLINK])])
900 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
901 [skb_set_inner_ipproto],
902 [OVS_DEFINE([HAVE_SKB_SET_INNER_IPPROTO])])
903 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
904 [tunnel_encap_types],
905 [OVS_DEFINE([HAVE_TUNNEL_ENCAP_TYPES])])
906 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
907 [IFLA_IPTUN_ENCAP_TYPE],
908 [OVS_DEFINE([HAVE_IFLA_IPTUN_ENCAP_TYPE])])
909 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
910 [IFLA_IPTUN_COLLECT_METADATA],
911 [OVS_DEFINE([HAVE_IFLA_IPTUN_COLLECT_METADATA])])
e1ededf4
GR		 912 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
913 [IFLA_GRE_ENCAP_DPORT])
914 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
915 [IFLA_GRE_COLLECT_METADATA])
916 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
917 [IFLA_GRE_IGNORE_DF])
918 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
919 [IFLA_GRE_FWMARK])
920 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
921 [IFLA_GRE_ERSPAN_INDEX])
922 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
923 [IFLA_GRE_ERSPAN_HWID])
436d36db
GR		 924 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
925 [IFLA_IPTUN_FWMARK])
10f24236
GR		 926 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/skbuff.h], [sk_buff],
927 [csum_valid],
928 [OVS_DEFINE([HAVE_SKBUFF_CSUM_VALID])])
9feb5bda
MM		 929 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/skbuff.h], [sk_buff],
930 [vlan_present],
931 [OVS_DEFINE([HAVE_SKBUFF_VLAN_PRESENT])])
10f24236
GR		 932 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
933 [skb_checksum_simple_validate])
44a629b5
GR		 934 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
935 [void.*ndo_get_stats64],
936 [OVS_DEFINE([HAVE_VOID_NDO_GET_STATS64])])
7f63d830
YS		 937 OVS_GREP_IFELSE([$KSRC/include/linux/timer.h], [init_timer_deferrable],
938 [OVS_DEFINE([HAVE_INIT_TIMER_DEFERRABLE])])
3f3b76f9
GR		 939 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip_tunnels.h],
940 [ip_tunnel_info_opts_set], [flags],
941 [OVS_DEFINE([HAVE_IP_TUNNEL_INFO_OPTS_SET_FLAGS])])
4a90b277
GR		 942 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
943 [rnd],
944 [OVS_DEFINE([HAVE_INET_FRAGS_RND])])
f7246940
GS		 945 OVS_GREP_IFELSE([$KSRC/include/linux/overflow.h], [__LINUX_OVERFLOW_H],
946 [OVS_DEFINE([HAVE_OVERFLOW_H])])
8f6d230f
YS		 947 OVS_GREP_IFELSE([$KSRC/include/linux/overflow.h], [struct_size],
948 [OVS_DEFINE([HAVE_STRUCT_SIZE])])
f7246940
GS		 949 OVS_GREP_IFELSE([$KSRC/include/linux/mm.h], [kvmalloc_array],
950 [OVS_DEFINE([HAVE_KVMALLOC_ARRAY])])
951 OVS_GREP_IFELSE([$KSRC/include/linux/mm.h], [kvmalloc_node],
952 [OVS_DEFINE([HAVE_KVMALLOC_NODE])])
945d6d1c
YS		 953 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_l3proto.h],
954 [nf_conntrack_l3proto],
955 [OVS_DEFINE([HAVE_NF_CONNTRACK_L3PROATO_H])])
4fdec898
FW		 956 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_core.h],
957 [nf_conntrack_in], [nf_hook_state],
958 [OVS_DEFINE([HAVE_NF_CONNTRACK_IN_TAKES_NF_HOOK_STATE])])
7857a9b4
FW		 959 OVS_GREP_IFELSE([$KSRC/include/net/ipv6_frag.h], [IP6_DEFRAG_CONNTRACK_IN],
960 [OVS_DEFINE([HAVE_IPV6_FRAG_H])])
7685ce31
GF		 961 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
962 [nf_ct_helper_ext_add], [nf_conntrack_helper],
963 [OVS_DEFINE([HAVE_NF_CT_HELPER_EXT_ADD_TAKES_HELPER])])
21a719d6 964
22bcc0e7
JG		 965 if cmp -s datapath/linux/kcompat.h.new \
966 datapath/linux/kcompat.h >/dev/null 2>&1; then
967 rm datapath/linux/kcompat.h.new
064af421 968 else
22bcc0e7 969 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 970 fi
971])
972
f6eb6b20 973dnl Checks for net/if_dl.h.
d30e714c 974dnl
d23fa2ed
YT		 975dnl (We use this as a proxy for checking whether we're building on FreeBSD
976dnl or NetBSD.)
9360d9b7
EM		 977AC_DEFUN([OVS_CHECK_IF_DL],
978 [AC_CHECK_HEADER([net/if_dl.h],
979 [HAVE_IF_DL=yes],
980 [HAVE_IF_DL=no])
981 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
982 if test "$HAVE_IF_DL" = yes; then
983 AC_DEFINE([HAVE_IF_DL], [1],
984 [Define to 1 if net/if_dl.h is available.])
d30e714c 985
d23fa2ed 986 # On these platforms we use libpcap to access network devices.
d30e714c 987 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 988 fi])
989
e50097d2
BP		 990dnl Checks for buggy strtok_r.
991dnl
992dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
993dnl with optimization that can cause segfaults:
994dnl
995dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
996AC_DEFUN([OVS_CHECK_STRTOK_R],
997 [AC_CACHE_CHECK(
998 [whether strtok_r macro segfaults on some inputs],
999 [ovs_cv_strtok_r_bug],
1000 [AC_RUN_IFELSE(
1001 [AC_LANG_PROGRAM([#include <stdio.h>
1002 #include <string.h>
1003 ],
416e7132
BP		 1004 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
1005 /* Assume bug is present, because relatively minor
1006 changes in compiler settings (e.g. optimization
1007 level) can make it crop up. */
1008 return 1;
1009 #else
1010 char string[] = ":::";
e50097d2
BP		 1011 char *save_ptr = (char *) 0xc0ffee;
1012 char *token1, *token2;
1013 token1 = strtok_r(string, ":", &save_ptr);
1014 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 1015 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 1016 printf ("%s %s\n", token1, token2);
1017 return 0;
416e7132 1018 #endif
e50097d2
BP		 1019 ]])],
1020 [ovs_cv_strtok_r_bug=no],
1021 [ovs_cv_strtok_r_bug=yes],
1022 [ovs_cv_strtok_r_bug=yes])])
1023 if test $ovs_cv_strtok_r_bug = yes; then
1024 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
1025 [Define if strtok_r macro segfaults on some inputs])
1026 fi
1027])
1028
064af421
BP		 1029dnl ----------------------------------------------------------------------
1030dnl These macros are from GNU PSPP, with the following original license:
1031dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
1032dnl This file is free software; the Free Software Foundation
1033dnl gives unlimited permission to copy and/or distribute it,
1034dnl with or without modifications, as long as this notice is preserved.
1035
50194820 1036AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
726af752 1037 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
064af421
BP		 1038 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
1039 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 1040 dnl Include -Werror in the compiler options, because without -Werror
1041 dnl clang's GCC-compatible compiler driver does not return a failure
1042 dnl exit status even though it complains about options it does not
1043 dnl understand.
c2deac54
YT		 1044 dnl
1045 dnl Also, check stderr as gcc exits with status 0 for options
1046 dnl rejected at getopt level.
1047 dnl % touch /tmp/a.c
1048 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
1049 dnl gcc: unrecognized option '-Qunused-arguments'
1050 dnl 0
1051 dnl %
4c1e8cb9
BP		 1052 dnl
1053 dnl In addition, GCC does not complain about a -Wno-<foo> option that
1054 dnl it does not understand, unless it has another error to report, so
1055 dnl instead of testing for -Wno-<foo>, test for the positive version.
1056 CFLAGS="$CFLAGS $WERROR m4_bpatsubst([$1], [-Wno-], [-W])"
37f4615e
BP		 1057 AC_COMPILE_IFELSE(
1058 [AC_LANG_SOURCE([int x;])],
1059 [if test -s conftest.err && grep "unrecognized option" conftest.err
1060 then
1061 ovs_cv_name[]=no
1062 else
1063 ovs_cv_name[]=yes
1064 fi],
1065 [ovs_cv_name[]=no])
064af421
BP		 1066 CFLAGS="$ovs_save_CFLAGS"])
1067 if test $ovs_cv_name = yes; then
83f6c050 1068 m4_if([$2], [], [:], [$2])
064af421
BP		 1069 else
1070 m4_if([$3], [], [:], [$3])
1071 fi
1072])
1073
50194820
BP		 1074dnl OVS_CHECK_WERROR
1075dnl
1076dnl Check whether the C compiler accepts -Werror.
1077dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
1078AC_DEFUN([OVS_CHECK_WERROR],
1079 [WERROR=
1080 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
1081
1082dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
1083dnl Check whether the given C compiler OPTION is accepted.
1084dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
1085AC_DEFUN([OVS_CHECK_CC_OPTION],
1086 [AC_REQUIRE([OVS_CHECK_WERROR])
1087 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
1088
064af421
BP		 1089dnl OVS_ENABLE_OPTION([OPTION])
1090dnl Check whether the given C compiler OPTION is accepted.
d161c099 1091dnl If so, add it to WARNING_FLAGS.
064af421
BP		 1092dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
1093AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 1094 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
1095 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 1096
1097dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
1098dnl Check whether the given C compiler OPTION is accepted.
1099dnl If so, enable the given Automake CONDITIONAL.
1100
1101dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
1102AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
1103 [OVS_CHECK_CC_OPTION(
1104 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
1105 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 1106dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 1107
1108dnl Check for too-old XenServer.
1109AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
1110 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
1111 [if test -e /etc/redhat-release; then
1112 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
1113 fi
1114 if test -z "$ovs_cv_xsversion"; then
1115 ovs_cv_xsversion=none
1116 fi])
1117 case $ovs_cv_xsversion in
1118 none)
1119 ;;
1120
1121 [[1-9]][[0-9]]* | dnl XenServer 10 or later
1122 [[6-9]]* | dnl XenServer 6 or later
1123 5.[[7-9]]* | dnl XenServer 5.7 or later
1124 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
1125 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
1126 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
1127 ;;
1128
1129 *)
1130 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
1131 ;;
1132 esac])
29d935d6 1133
643c0c34
BP		 1134dnl OVS_CHECK_SPARSE_TARGET
1135dnl
1136dnl The "cgcc" script from "sparse" isn't very good at detecting the
1137dnl target for which the code is being built. This helps it out.
1138AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
1139 [AC_CACHE_CHECK(
1140 [target hint for cgcc],
1141 [ac_cv_sparse_target],
1142 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
1143 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
1144 [x86_64-*], [ac_cv_sparse_target=x86_64],
1145 [ac_cv_sparse_target=other])])
1146 AS_CASE([$ac_cv_sparse_target],
0cdd5b13
BP		 1147 [x86], [SPARSEFLAGS= CGCCFLAGS="-target=i86 -target=host_os_specs"],
1148 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS="-target=x86_64 -target=host_os_specs"],
643c0c34 1149 [SPARSEFLAGS= CGCCFLAGS=])
346c6538
IM		 1150
1151 dnl Get the the default defines for vector instructions from compiler to
1152 dnl allow "sparse" correctly check the same code that will be built.
1153 dnl Required for checking DPDK headers.
1154 AC_MSG_CHECKING([vector options for cgcc])
1155 VECTOR=$($CC -dM -E - < /dev/null | grep -E "MMX|SSE|AVX" | \
1156 cut -c 9- | sed 's/ /=/' | sed 's/^/-D/' | tr '\n' ' ')
1157 AC_MSG_RESULT([$VECTOR])
1158 CGCCFLAGS="$CGCCFLAGS $VECTOR"
1159
643c0c34
BP		 1160 AC_SUBST([SPARSEFLAGS])
1161 AC_SUBST([CGCCFLAGS])])
1162
32e96ab7
AZ		 1163dnl OVS_SPARSE_EXTRA_INCLUDES
1164dnl
1165dnl The cgcc script from "sparse" does not search gcc's default
1166dnl search path. Get the default search path from GCC and pass
1167dnl them to sparse.
1168AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
1169 AC_SUBST([SPARSE_EXTRA_INCLUDES],
1170 [`$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 ' ' `] ))
1171
29d935d6
BP		 1172dnl OVS_ENABLE_SPARSE
1173AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 1174 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
32e96ab7 1175 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 1176 : ${SPARSE=sparse}
1177 AC_SUBST([SPARSE])
1178 AC_CONFIG_COMMANDS_PRE(
d4042a70
BP		 1179 [CC='$(if $(C:0=),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) $(SPARSE_WERROR) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])
1180
1181 AC_ARG_ENABLE(
1182 [sparse],
1183 [AC_HELP_STRING([--enable-sparse], [Run "sparse" by default])],
1184 [], [enable_sparse=no])
1185 AM_CONDITIONAL([ENABLE_SPARSE_BY_DEFAULT], [test $enable_sparse = yes])])
8a8cd0ac 1186
0eaaacac
FL		 1187dnl OVS_CTAGS_IDENTIFIERS
1188dnl
1189dnl ctags ignores symbols with extras identifiers. This builds a list of
1190dnl specially handled identifiers to be ignored.
1191AC_DEFUN([OVS_CTAGS_IDENTIFIERS],
1192 AC_SUBST([OVS_CTAGS_IDENTIFIERS_LIST],
c9990318 1193 [`printf %s '-I "'; sed -n 's/^#define \(OVS_[A-Z_]\+\)(\.\.\.)$/\1+/p' ${srcdir}/include/openvswitch/compiler.h | tr \\\n ' ' ; printf '"'`] ))
0eaaacac 1194
8a8cd0ac
BP		 1195dnl OVS_PTHREAD_SET_NAME
1196dnl
1197dnl This checks for three known variants of pthreads functions for setting
1198dnl the name of the current thread:
1199dnl
1200dnl glibc: int pthread_setname_np(pthread_t, const char *name);
1201dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
1202dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
1203dnl
1204dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
1205dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
1206dnl provide to it.
1207dnl
1208dnl This macro defines:
1209dnl
1210dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
1211dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
1212dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
1213AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
1214 [AC_CHECK_FUNCS([pthread_set_name_np])
1215 if test $ac_cv_func_pthread_set_name_np != yes; then
1216 AC_CACHE_CHECK(
1217 [for pthread_setname_np() variant],
1218 [ovs_cv_pthread_setname_np],
1219 [AC_LINK_IFELSE(
a0903134 1220 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac 1221 ], [pthread_setname_np(pthread_self(), "name");])],
a0903134 1222 [ovs_cv_pthread_setname_np=glibc],
8a8cd0ac 1223 [AC_LINK_IFELSE(
a0903134 1224 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac
BP		 1225], [pthread_setname_np(pthread_self(), "%s", "name");])],
1226 [ovs_cv_pthread_setname_np=netbsd],
a0903134 1227 [ovs_cv_pthread_setname_np=none])])])
8a8cd0ac
BP		 1228 case $ovs_cv_pthread_setname_np in # (
1229 glibc)
a0903134
YT		 1230 AC_DEFINE(
1231 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
1232 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
1233 ;; # (
8a8cd0ac 1234 netbsd)
a0903134
YT		 1235 AC_DEFINE(
1236 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
1237 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
1238 ;;
8a8cd0ac
BP		 1239 esac
1240 fi])
5020f5f0
BP		 1241
1242dnl OVS_CHECK_LINUX_HOST.
1243dnl
1244dnl Checks whether we're building for a Linux host, based on the presence of
1245dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
1246dnl LINUX based on the result.
1247AC_DEFUN([OVS_CHECK_LINUX_HOST],
1248 [AC_CACHE_CHECK(
1249 [whether __linux__ is defined],
1250 [ovs_cv_linux],
1251 [AC_COMPILE_IFELSE(
1252 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
1253 [ovs_cv_linux=true],
1254 [ovs_cv_linux=false])])
1255 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
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