3 # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2019 Nicira, Inc.
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:
9 # http://www.apache.org/licenses/LICENSE-2.0
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.
18 AC_DEFUN([OVS_ENABLE_WERROR],
21 [AC_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
22 [], [enable_Werror=no])
23 AC_CONFIG_COMMANDS_PRE(
24 [if test "X$enable_Werror" = Xyes; then
25 OVS_CFLAGS="$OVS_CFLAGS -Werror"
28 # Unless --enable-Werror is specified, report but do not fail the build
29 # for errors reported by flake8.
30 if test "X$enable_Werror" = Xyes; then
35 AC_SUBST([FLAKE8_WERROR])
37 # If --enable-Werror is specified, fail the build on sparse warnings.
38 if test "X$enable_Werror" = Xyes; then
39 SPARSE_WERROR=-Wsparse-error
43 AC_SUBST([SPARSE_WERROR])])
47 dnl Configure linux kernel source tree
48 AC_DEFUN([OVS_CHECK_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
55 (usually figured out automatically from build
58 # Deprecated equivalents to --with-linux, --with-linux-source.
60 AC_ARG_WITH([l26-source])
62 if test X"$with_linux" != X; then
64 elif test X"$with_l26" != X; then
66 AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
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
76 AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
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])
84 if test -n "$KBUILD"; then
85 KBUILD=`eval echo "$KBUILD"`
88 *) KBUILD=`pwd`/$KBUILD ;;
91 # The build directory is what the user provided.
92 # Make sure that it exists.
93 AC_MSG_CHECKING([for Linux build directory])
94 if test -d "$KBUILD"; then
95 AC_MSG_RESULT([$KBUILD])
99 AC_ERROR([source dir $KBUILD doesn't exist])
102 # Debian breaks kernel headers into "source" header and "build" headers.
103 # We want the source headers, but $KBUILD gives us the "build" headers.
104 # Use heuristics to find the source headers.
105 AC_MSG_CHECKING([for Linux source directory])
106 if test -n "$KSRC"; then
107 KSRC=`eval echo "$KSRC"`
110 *) KSRC=`pwd`/$KSRC ;;
112 if test ! -e $KSRC/include/linux/kernel.h; then
113 AC_MSG_ERROR([$KSRC is not a kernel source directory])
117 if test ! -e $KSRC/include/linux/kernel.h; then
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 # (
126 KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
129 KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
134 if test ! -e "$KSRC"/include/linux/kernel.h; then
135 AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
138 AC_MSG_RESULT([$KSRC])
140 AC_MSG_CHECKING([for kernel version])
141 version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
142 patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
143 sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
144 if test X"$version" = X || test X"$patchlevel" = X; then
145 AC_ERROR([cannot determine kernel version])
146 elif test X"$sublevel" = X; then
147 kversion=$version.$patchlevel
149 kversion=$version.$patchlevel.$sublevel
151 AC_MSG_RESULT([$kversion])
153 if test "$version" -ge 4; then
154 if test "$version" = 4 && test "$patchlevel" -le 18; then
157 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.18.x is not supported (please refer to the FAQ for advice)])
159 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
162 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
164 if (test ! -e "$KBUILD"/include/linux/version.h && \
165 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
166 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
167 test ! -e "$KBUILD"/include/generated/autoconf.h); then
168 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
170 OVS_CHECK_LINUX_COMPAT
172 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
175 dnl OVS_CHECK_LINUX_TC
177 dnl Configure Linux tc compat.
178 AC_DEFUN([OVS_CHECK_LINUX_TC], [
180 AC_LANG_PROGRAM([#include <linux/pkt_cls.h>], [
181 int x = TCA_FLOWER_KEY_ENC_IP_TTL_MASK;
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.])])
187 AC_LANG_PROGRAM([#include <linux/tc_act/tc_vlan.h>], [
188 int x = TCA_VLAN_PUSH_VLAN_PRIORITY;
190 [AC_DEFINE([HAVE_TCA_VLAN_PUSH_VLAN_PRIORITY], [1],
191 [Define to 1 if TCA_VLAN_PUSH_VLAN_PRIORITY is available.])])
194 AC_LANG_PROGRAM([#include <linux/tc_act/tc_tunnel_key.h>], [
195 int x = TCA_TUNNEL_KEY_ENC_TTL;
197 [AC_DEFINE([HAVE_TCA_TUNNEL_KEY_ENC_TTL], [1],
198 [Define to 1 if TCA_TUNNEL_KEY_ENC_TTL is available.])])
201 AC_LANG_PROGRAM([#include <linux/tc_act/tc_pedit.h>], [
202 int x = TCA_PEDIT_KEY_EX_HDR_TYPE_UDP;
204 [AC_DEFINE([HAVE_TCA_PEDIT_KEY_EX_HDR_TYPE_UDP], [1],
205 [Define to 1 if TCA_PEDIT_KEY_EX_HDR_TYPE_UDP is available.])])
208 AC_LANG_PROGRAM([#include <linux/tc_act/tc_skbedit.h>], [
209 int x = TCA_SKBEDIT_FLAGS;
211 [AC_DEFINE([HAVE_TCA_SKBEDIT_FLAGS], [1],
212 [Define to 1 if TCA_SKBEDIT_FLAGS is available.])])
215 dnl OVS_FIND_DEPENDENCY(FUNCTION, SEARCH_LIBS, NAME_TO_PRINT)
217 dnl Check for a function in a library list.
218 AC_DEFUN([OVS_FIND_DEPENDENCY], [
219 AC_SEARCH_LIBS([$1], [$2], [], [
220 AC_MSG_ERROR([unable to find $3, install the dependency package])
226 dnl Configure DPDK source tree
227 AC_DEFUN([OVS_CHECK_DPDK], [
229 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
230 [Specify the DPDK build directory])],
233 AC_MSG_CHECKING([whether dpdk datapath is enabled])
234 if test "$have_dpdk" != true || test "$with_dpdk" = no; then
241 DPDK_AUTO_DISCOVER="true"
242 PKG_CHECK_MODULES_STATIC([DPDK], [libdpdk], [
243 DPDK_INCLUDE="$DPDK_CFLAGS"
244 DPDK_LIB="$DPDK_LIBS"], [
245 DPDK_INCLUDE="-I/usr/local/include/dpdk -I/usr/include/dpdk"
249 DPDK_AUTO_DISCOVER="false"
250 DPDK_INCLUDE_PATH="$with_dpdk/include"
251 # If 'with_dpdk' is passed install directory, point to headers
252 # installed in $DESTDIR/$prefix/include/dpdk
253 if test -e "$DPDK_INCLUDE_PATH/rte_config.h"; then
254 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH"
255 elif test -e "$DPDK_INCLUDE_PATH/dpdk/rte_config.h"; then
256 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH/dpdk"
258 DPDK_LIB_DIR="$with_dpdk/lib"
263 ovs_save_CFLAGS="$CFLAGS"
264 ovs_save_LDFLAGS="$LDFLAGS"
265 CFLAGS="$CFLAGS $DPDK_INCLUDE"
266 if test "$DPDK_AUTO_DISCOVER" = "false"; then
267 LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
270 AC_CHECK_HEADERS([rte_config.h], [], [
271 AC_MSG_ERROR([unable to find rte_config.h in $with_dpdk])
272 ], [AC_INCLUDES_DEFAULT])
274 AC_CHECK_DECLS([RTE_LIBRTE_VHOST_NUMA, RTE_EAL_NUMA_AWARE_HUGEPAGES], [
275 OVS_FIND_DEPENDENCY([get_mempolicy], [numa], [libnuma])
276 ], [], [[#include <rte_config.h>]])
278 AC_CHECK_DECL([RTE_LIBRTE_VHOST_NUMA], [
279 AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])
280 ], [], [[#include <rte_config.h>]])
282 AC_CHECK_DECL([RTE_LIBRTE_PMD_PCAP], [
283 OVS_FIND_DEPENDENCY([pcap_dump], [pcap], [libpcap])
284 AC_CHECK_DECL([RTE_LIBRTE_PDUMP], [
285 AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])
286 ], [], [[#include <rte_config.h>]])
287 ], [], [[#include <rte_config.h>]])
289 AC_CHECK_DECL([RTE_LIBRTE_MLX5_PMD], [dnl found
290 OVS_FIND_DEPENDENCY([mnl_attr_put], [mnl], [libmnl])
291 AC_CHECK_DECL([RTE_LIBRTE_MLX5_DLOPEN_DEPS], [], [dnl not found
292 OVS_FIND_DEPENDENCY([mlx5dv_create_wq], [mlx5], [libmlx5])
293 OVS_FIND_DEPENDENCY([verbs_init_cq], [ibverbs], [libibverbs])
294 ], [[#include <rte_config.h>]])
295 ], [], [[#include <rte_config.h>]])
297 AC_CHECK_DECL([RTE_LIBRTE_MLX4_PMD], [dnl found
298 AC_CHECK_DECL([RTE_LIBRTE_MLX4_DLOPEN_DEPS], [], [dnl not found
299 OVS_FIND_DEPENDENCY([mlx4dv_init_obj], [mlx4], [libmlx4])
300 OVS_FIND_DEPENDENCY([verbs_init_cq], [ibverbs], [libibverbs])
301 ], [[#include <rte_config.h>]])
302 ], [], [[#include <rte_config.h>]])
304 # DPDK uses dlopen to load plugins.
305 OVS_FIND_DEPENDENCY([dlopen], [dl], [libdl])
307 AC_MSG_CHECKING([whether linking with dpdk works])
308 LIBS="$DPDK_LIB $LIBS"
310 [AC_LANG_PROGRAM([#include <rte_config.h>
311 #include <rte_eal.h>],
312 [int rte_argc; char ** rte_argv;
313 rte_eal_init(rte_argc, rte_argv);])],
314 [AC_MSG_RESULT([yes])
317 if test "$DPDK_AUTO_DISCOVER" = "true"; then
318 AC_MSG_ERROR(m4_normalize([
319 Could not find DPDK library in default search path, Use --with-dpdk
320 to specify the DPDK library installed in non-standard location]))
322 AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
326 CFLAGS="$ovs_save_CFLAGS"
327 LDFLAGS="$ovs_save_LDFLAGS"
328 if test "$DPDK_AUTO_DISCOVER" = "false"; then
329 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
331 OVS_CFLAGS="$OVS_CFLAGS $DPDK_INCLUDE"
332 OVS_ENABLE_OPTION([-mssse3])
334 # DPDK pmd drivers are not linked unless --whole-archive is used.
336 # This happens because the rest of the DPDK code doesn't use any symbol in
337 # the pmd driver objects, and the drivers register themselves using an
338 # __attribute__((constructor)) function.
340 # These options are specified inside a single -Wl directive to prevent
341 # autotools from reordering them.
343 # OTOH newer versions of dpdk pkg-config (generated with Meson)
344 # will already have flagged just the right set of libs with
345 # --whole-archive - in those cases do not wrap it once more.
347 *whole-archive*) DPDK_vswitchd_LDFLAGS=$DPDK_LIB;;
348 *) DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
350 AC_SUBST([DPDK_vswitchd_LDFLAGS])
351 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
354 AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
357 dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
359 dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
360 dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
361 dnl <REGEX> translated to uppercase.
362 AC_DEFUN([OVS_GREP_IFELSE], [
363 AC_MSG_CHECKING([whether $2 matches in $1])
365 grep '$2' $1 >/dev/null 2>&1
370 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
377 AC_MSG_ERROR([grep exited with status $status])
381 AC_MSG_RESULT([file not found])
386 dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
388 dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
389 dnl structure definition. If this is successful, runs IF-MATCH, otherwise
390 dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
391 dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
392 dnl translated to uppercase.
393 AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
394 AC_MSG_CHECKING([whether $2 has member $3 in $1])
396 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
401 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
408 AC_MSG_ERROR([grep exited with status $status])
412 AC_MSG_RESULT([file not found])
417 dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
419 dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
420 dnl the function signature starting from the line matching FUNCTION
421 dnl and ending with the line containing the closing parenthesis. If
422 dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
423 dnl IF-MATCH is empty then it defines to
424 dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
425 dnl <REGEX> translated to uppercase.
426 AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
427 AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
429 awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
434 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
441 AC_MSG_ERROR([grep exited with status $status])
445 AC_MSG_RESULT([file not found])
452 dnl Defines NAME to 1 in kcompat.h.
453 AC_DEFUN([OVS_DEFINE], [
454 echo '#define $1 1' >> datapath/linux/kcompat.h.new
457 dnl OVS_CHECK_LINUX_COMPAT
459 dnl Runs various Autoconf checks on the Linux kernel source in
460 dnl the directory in $KBUILD.
461 AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
462 rm -f datapath/linux/kcompat.h.new
463 mkdir -p datapath/linux
464 : > datapath/linux/kcompat.h.new
466 echo '#include <linux/version.h>
467 #ifndef RHEL_RELEASE_CODE
468 #define RHEL_RELEASE_CODE 0
469 #define RHEL_RELEASE_VERSION(a, b) 0
470 #endif' >> datapath/linux/kcompat.h.new
472 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
473 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
475 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6_get_cookie],
476 [OVS_DEFINE([HAVE_RT6_GET_COOKIE])])
478 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
479 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
480 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
482 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
483 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
484 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
486 OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [static_branch_unlikely(],
487 [OVS_DEFINE([HAVE_UPSTREAM_STATIC_KEY])])
488 OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [DEFINE_STATIC_KEY_FALSE],
489 [OVS_DEFINE([HAVE_DEFINE_STATIC_KEY])])
491 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
492 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
494 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
495 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
496 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
497 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
498 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
500 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
501 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
502 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
503 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
504 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
505 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
507 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
508 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
509 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
510 [OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
511 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
512 [ip_do_fragment], [net],
513 [OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
514 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
515 [ip_local_out], [net],
516 [OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
518 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
520 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
521 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
522 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
523 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
524 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
525 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
526 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
527 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
528 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
529 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
531 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
533 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
535 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
536 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
537 [sub_frag_mem_limit], [struct.netns_frags],
538 [OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
539 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
540 [OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
541 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
542 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
544 dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
545 dnl OVS does not really need ipv6 label field, but its presence signifies that
546 dnl the stack has all required ipv6 support.
547 dnl OVS also does not need dst_cache But this dependency allows us to write
548 dnl much cleaner code.
550 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
552 [OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
553 [iptunnel_pull_offloads],
554 [OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
555 [OVS_GREP_IFELSE([$KSRC/include/net/erspan.h], [erspan_md2],
556 [OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])])
558 OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
559 [OVS_DEFINE([USE_BUILTIN_DST_CACHE])])
560 OVS_GREP_IFELSE([$KSRC/include/net/mpls.h], [mpls_hdr],
561 [OVS_DEFINE([MPLS_HEADER_IS_L3])])
562 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
563 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
564 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
565 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
566 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
567 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
568 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
569 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
570 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_gso_error_unwind])
571 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
572 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
573 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
574 [OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
575 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
576 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
577 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_udp_tunnel_add])
578 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
579 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
580 dnl So check type of tstats.
581 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
582 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
583 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
584 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
585 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_csum_hwoffload_help])
586 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
587 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
588 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
589 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
590 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
591 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
593 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
594 [netdev_master_upper_dev_link], [upper_priv],
595 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
596 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
597 [netdev_master_upper_dev_link_rh],
598 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_RH])])
600 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
602 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops_extended],
603 [ndo_change_mtu], [OVS_DEFINE([HAVE_RHEL7_MAX_MTU])])
605 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
606 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
607 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
608 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
609 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
610 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
611 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
612 [owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
613 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [NFPROTO_INET])
616 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
617 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
619 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
620 [nf_conn], [struct timer_list[[ \t]]*timeout],
621 [OVS_DEFINE([HAVE_NF_CONN_TIMER])])
622 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
623 [nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
625 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
626 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
627 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
628 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
629 [nf_ct_get_tuplepr], [struct.net],
630 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
631 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
633 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
634 [nf_ct_is_untracked])
635 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
637 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_l3proto.h],
639 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
641 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
642 [nf_connlabels_get], [int bit],
643 [OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
644 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
645 [nf_conn_labels], [words])
646 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
647 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
648 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_range2])
649 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
650 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_count.h], [nf_conncount_gc_list],
651 [OVS_DEFINE([HAVE_UPSTREAM_NF_CONNCOUNT])])
653 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
654 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
656 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
657 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
658 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
659 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
660 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
662 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
663 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
664 [rcu_read_lock_held])])
665 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
666 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [net_rwsem])
668 # Check for the proto_data_valid member in struct sk_buff. The [^@]
669 # is necessary because some versions of this header remove the
670 # member but retain the kerneldoc comment that describes it (which
671 # starts with @). The brackets must be doubled because of m4
673 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
674 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
675 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
676 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
677 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
678 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
679 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
680 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
681 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
682 [OVS_DEFINE([HAVE_U16_RXHASH])])
683 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
684 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
685 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
686 [skb_copy_from_linear_data_offset])
687 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
688 [skb_reset_tail_pointer])
689 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
690 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
691 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
692 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
693 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
694 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
695 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
696 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
697 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
698 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
699 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
700 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
701 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
702 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
703 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
704 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
705 [OVS_DEFINE([HAVE_L4_RXHASH])])
706 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
707 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
708 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
709 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
710 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
711 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
712 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
713 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
714 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_put_zero])
716 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
717 [OVS_DEFINE([HAVE_BOOL_TYPE])])
718 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
719 [OVS_DEFINE([HAVE_CSUM_TYPES])])
720 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
721 [OVS_DEFINE([HAVE_CSUM_TYPES])])
723 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
724 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
726 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
727 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
729 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
730 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
731 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
732 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
733 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
734 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
735 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
736 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
737 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
738 [genl_notify], [net],
739 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
742 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
743 [genl_multicast_group], [id])
744 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
746 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
747 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
748 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
749 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
750 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
751 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
752 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
753 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
754 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
756 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
757 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
758 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
759 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
760 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
761 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
762 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
763 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
764 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
765 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
766 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
767 [nla_parse], [netlink_ext_ack],
768 [OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
770 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
772 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
773 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
774 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
775 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
776 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
777 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
778 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
780 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/dst_metadata.h],
781 [metadata_dst_alloc], [metadata_type])
783 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
785 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
786 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
787 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
788 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
789 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
790 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
791 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
792 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
793 [OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
794 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
797 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
798 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
799 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
800 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
802 OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
803 OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
804 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
805 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
806 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
807 [udp_add_offload], [net],
808 [OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
809 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
810 [nf_defrag_ipv6_enable], [net],
811 [OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
812 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [family_list],
813 [OVS_DEFINE([HAVE_GENL_FAMILY_LIST])])
814 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
816 [OVS_DEFINE([HAVE_NEEDS_FREE_NETDEV])])
817 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_dev], [cfg],
818 [OVS_DEFINE([HAVE_VXLAN_DEV_CFG])])
819 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
820 [nf_conntrack_helper_put],
821 [OVS_DEFINE(HAVE_NF_CONNTRACK_HELPER_PUT)])
822 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],[[[[:space:]]]SKB_GSO_UDP[[[:space:]]]],
823 [OVS_DEFINE([HAVE_SKB_GSO_UDP])])
824 OVS_GREP_IFELSE([$KSRC/include/net/dst.h],[DST_NOCACHE],
825 [OVS_DEFINE([HAVE_DST_NOCACHE])])
826 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_link_ops],
828 [OVS_DEFINE([HAVE_EXT_ACK_IN_RTNL_LINKOPS])])
829 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
831 [OVS_DEFINE([HAVE_LIST_IN_NF_HOOK_OPS])])
832 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netfilter/nf_conntrack_common.h],
834 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
835 [netdev_master_upper_dev_link], [extack],
836 [OVS_DEFINE([HAVE_UPPER_DEV_LINK_EXTACK])])
837 OVS_GREP_IFELSE([$KSRC/include/linux/compiler_types.h],
838 [__LINUX_COMPILER_TYPES_H],
839 [OVS_DEFINE([HAVE_LINUX_COMPILER_TYPES_H])])
840 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
842 [OVS_DEFINE([HAVE_KTIME_GET_TS64])])
843 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h],
844 [EXPORT_SYMBOL_GPL(peernet2id_alloc)],
845 [OVS_DEFINE([HAVE_PEERNET2ID_ALLOC])])
846 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
848 [OVS_DEFINE([HAVE_KTIME_GET_NS])])
849 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h],
850 frag_percpu_counter_batch[],
851 [OVS_DEFINE([HAVE_FRAG_PERCPU_COUNTER_BATCH])])
852 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
853 [null_compute_pseudo],
854 [OVS_DEFINE([HAVE_NULL_COMPUTE_PSEUDO])])
855 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
856 [__skb_checksum_convert],
857 [OVS_DEFINE([HAVE_SKB_CHECKSUM_CONVERT])])
858 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
860 [OVS_DEFINE([HAVE_NET_DEVICE_MAX_MTU])])
861 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip6_tunnel.h], [__ip6_tnl_parm],
863 [OVS_DEFINE([HAVE_IP6_TNL_PARM_ERSPAN_VER])])
864 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
866 [OVS_DEFINE([HAVE_SKB_GSO_IPXIP6])])
867 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ipv6.h],
868 [ip6_make_flowlabel], [fl6],
869 [OVS_DEFINE([HAVE_IP6_MAKE_FLOWLABEL_FL6])])
870 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ipv6.h], [netns_sysctl_ipv6],
872 [OVS_DEFINE([HAVE_NETNS_SYSCTL_IPV6_AUTO_FLOWLABELS])])
873 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
875 [OVS_DEFINE([HAVE_NETIF_KEEP_DST])])
876 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
878 [OVS_DEFINE([HAVE_NDO_GET_IFLINK])])
879 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
880 [skb_set_inner_ipproto],
881 [OVS_DEFINE([HAVE_SKB_SET_INNER_IPPROTO])])
882 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
883 [tunnel_encap_types],
884 [OVS_DEFINE([HAVE_TUNNEL_ENCAP_TYPES])])
885 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
886 [IFLA_IPTUN_ENCAP_TYPE],
887 [OVS_DEFINE([HAVE_IFLA_IPTUN_ENCAP_TYPE])])
888 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
889 [IFLA_IPTUN_COLLECT_METADATA],
890 [OVS_DEFINE([HAVE_IFLA_IPTUN_COLLECT_METADATA])])
891 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
892 [IFLA_GRE_ENCAP_DPORT])
893 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
894 [IFLA_GRE_COLLECT_METADATA])
895 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
896 [IFLA_GRE_IGNORE_DF])
897 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
899 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
900 [IFLA_GRE_ERSPAN_INDEX])
901 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
902 [IFLA_GRE_ERSPAN_HWID])
903 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
905 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/skbuff.h], [sk_buff],
907 [OVS_DEFINE([HAVE_SKBUFF_CSUM_VALID])])
908 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
909 [skb_checksum_simple_validate])
910 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
911 [void.*ndo_get_stats64],
912 [OVS_DEFINE([HAVE_VOID_NDO_GET_STATS64])])
913 OVS_GREP_IFELSE([$KSRC/include/linux/timer.h], [init_timer_deferrable],
914 [OVS_DEFINE([HAVE_INIT_TIMER_DEFERRABLE])])
915 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip_tunnels.h],
916 [ip_tunnel_info_opts_set], [flags],
917 [OVS_DEFINE([HAVE_IP_TUNNEL_INFO_OPTS_SET_FLAGS])])
918 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
920 [OVS_DEFINE([HAVE_INET_FRAGS_RND])])
921 OVS_GREP_IFELSE([$KSRC/include/linux/overflow.h], [__LINUX_OVERFLOW_H],
922 [OVS_DEFINE([HAVE_OVERFLOW_H])])
923 OVS_GREP_IFELSE([$KSRC/include/linux/overflow.h], [struct_size],
924 [OVS_DEFINE([HAVE_STRUCT_SIZE])])
925 OVS_GREP_IFELSE([$KSRC/include/linux/mm.h], [kvmalloc_array],
926 [OVS_DEFINE([HAVE_KVMALLOC_ARRAY])])
927 OVS_GREP_IFELSE([$KSRC/include/linux/mm.h], [kvmalloc_node],
928 [OVS_DEFINE([HAVE_KVMALLOC_NODE])])
930 if cmp -s datapath/linux/kcompat.h.new \
931 datapath/linux/kcompat.h >/dev/null 2>&1; then
932 rm datapath/linux/kcompat.h.new
934 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
938 dnl Checks for net/if_dl.h.
940 dnl (We use this as a proxy for checking whether we're building on FreeBSD
942 AC_DEFUN([OVS_CHECK_IF_DL],
943 [AC_CHECK_HEADER([net/if_dl.h],
946 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
947 if test "$HAVE_IF_DL" = yes; then
948 AC_DEFINE([HAVE_IF_DL], [1],
949 [Define to 1 if net/if_dl.h is available.])
951 # On these platforms we use libpcap to access network devices.
952 AC_SEARCH_LIBS([pcap_open_live], [pcap])
955 dnl Checks for buggy strtok_r.
957 dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
958 dnl with optimization that can cause segfaults:
960 dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
961 AC_DEFUN([OVS_CHECK_STRTOK_R],
963 [whether strtok_r macro segfaults on some inputs],
964 [ovs_cv_strtok_r_bug],
966 [AC_LANG_PROGRAM([#include <stdio.h>
969 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
970 /* Assume bug is present, because relatively minor
971 changes in compiler settings (e.g. optimization
972 level) can make it crop up. */
975 char string[] = ":::";
976 char *save_ptr = (char *) 0xc0ffee;
977 char *token1, *token2;
978 token1 = strtok_r(string, ":", &save_ptr);
979 token2 = strtok_r(NULL, ":", &save_ptr);
980 freopen ("/dev/null", "w", stdout);
981 printf ("%s %s\n", token1, token2);
985 [ovs_cv_strtok_r_bug=no],
986 [ovs_cv_strtok_r_bug=yes],
987 [ovs_cv_strtok_r_bug=yes])])
988 if test $ovs_cv_strtok_r_bug = yes; then
989 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
990 [Define if strtok_r macro segfaults on some inputs])
994 dnl ----------------------------------------------------------------------
995 dnl These macros are from GNU PSPP, with the following original license:
996 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
997 dnl This file is free software; the Free Software Foundation
998 dnl gives unlimited permission to copy and/or distribute it,
999 dnl with or without modifications, as long as this notice is preserved.
1001 AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
1002 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
1003 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
1004 [ovs_save_CFLAGS="$CFLAGS"
1005 dnl Include -Werror in the compiler options, because without -Werror
1006 dnl clang's GCC-compatible compiler driver does not return a failure
1007 dnl exit status even though it complains about options it does not
1010 dnl Also, check stderr as gcc exits with status 0 for options
1011 dnl rejected at getopt level.
1012 dnl % touch /tmp/a.c
1013 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
1014 dnl gcc: unrecognized option '-Qunused-arguments'
1018 dnl In addition, GCC does not complain about a -Wno-<foo> option that
1019 dnl it does not understand, unless it has another error to report, so
1020 dnl instead of testing for -Wno-<foo>, test for the positive version.
1021 CFLAGS="$CFLAGS $WERROR m4_bpatsubst([$1], [-Wno-], [-W])"
1023 [AC_LANG_SOURCE([int x;])],
1024 [if test -s conftest.err && grep "unrecognized option" conftest.err
1031 CFLAGS="$ovs_save_CFLAGS"])
1032 if test $ovs_cv_name = yes; then
1033 m4_if([$2], [], [:], [$2])
1035 m4_if([$3], [], [:], [$3])
1039 dnl OVS_CHECK_WERROR
1041 dnl Check whether the C compiler accepts -Werror.
1042 dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
1043 AC_DEFUN([OVS_CHECK_WERROR],
1045 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
1047 dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
1048 dnl Check whether the given C compiler OPTION is accepted.
1049 dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
1050 AC_DEFUN([OVS_CHECK_CC_OPTION],
1051 [AC_REQUIRE([OVS_CHECK_WERROR])
1052 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
1054 dnl OVS_ENABLE_OPTION([OPTION])
1055 dnl Check whether the given C compiler OPTION is accepted.
1056 dnl If so, add it to WARNING_FLAGS.
1057 dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
1058 AC_DEFUN([OVS_ENABLE_OPTION],
1059 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
1060 AC_SUBST([WARNING_FLAGS])])
1062 dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
1063 dnl Check whether the given C compiler OPTION is accepted.
1064 dnl If so, enable the given Automake CONDITIONAL.
1066 dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
1067 AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
1068 [OVS_CHECK_CC_OPTION(
1069 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
1070 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
1071 dnl ----------------------------------------------------------------------
1073 dnl Check for too-old XenServer.
1074 AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
1075 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
1076 [if test -e /etc/redhat-release; then
1077 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
1079 if test -z "$ovs_cv_xsversion"; then
1080 ovs_cv_xsversion=none
1082 case $ovs_cv_xsversion in
1086 [[1-9]][[0-9]]* | dnl XenServer 10 or later
1087 [[6-9]]* | dnl XenServer 6 or later
1088 5.[[7-9]]* | dnl XenServer 5.7 or later
1089 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
1090 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
1091 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
1095 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
1099 dnl OVS_CHECK_SPARSE_TARGET
1101 dnl The "cgcc" script from "sparse" isn't very good at detecting the
1102 dnl target for which the code is being built. This helps it out.
1103 AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
1105 [target hint for cgcc],
1106 [ac_cv_sparse_target],
1107 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
1108 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
1109 [x86_64-*], [ac_cv_sparse_target=x86_64],
1110 [ac_cv_sparse_target=other])])
1111 AS_CASE([$ac_cv_sparse_target],
1112 [x86], [SPARSEFLAGS= CGCCFLAGS="-target=i86 -target=host_os_specs"],
1113 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS="-target=x86_64 -target=host_os_specs"],
1114 [SPARSEFLAGS= CGCCFLAGS=])
1115 AC_SUBST([SPARSEFLAGS])
1116 AC_SUBST([CGCCFLAGS])])
1118 dnl OVS_SPARSE_EXTRA_INCLUDES
1120 dnl The cgcc script from "sparse" does not search gcc's default
1121 dnl search path. Get the default search path from GCC and pass
1123 AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
1124 AC_SUBST([SPARSE_EXTRA_INCLUDES],
1125 [`$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 ' ' `] ))
1127 dnl OVS_ENABLE_SPARSE
1128 AC_DEFUN([OVS_ENABLE_SPARSE],
1129 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
1130 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
1133 AC_CONFIG_COMMANDS_PRE(
1134 [CC='$(if $(C:0=),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) $(SPARSE_WERROR) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])
1138 [AC_HELP_STRING([--enable-sparse], [Run "sparse" by default])],
1139 [], [enable_sparse=no])
1140 AM_CONDITIONAL([ENABLE_SPARSE_BY_DEFAULT], [test $enable_sparse = yes])])
1142 dnl OVS_CTAGS_IDENTIFIERS
1144 dnl ctags ignores symbols with extras identifiers. This builds a list of
1145 dnl specially handled identifiers to be ignored.
1146 AC_DEFUN([OVS_CTAGS_IDENTIFIERS],
1147 AC_SUBST([OVS_CTAGS_IDENTIFIERS_LIST],
1148 [`printf %s '-I "'; sed -n 's/^#define \(OVS_[A-Z_]\+\)(\.\.\.)$/\1+/p' ${srcdir}/include/openvswitch/compiler.h | tr \\\n ' ' ; printf '"'`] ))
1150 dnl OVS_PTHREAD_SET_NAME
1152 dnl This checks for three known variants of pthreads functions for setting
1153 dnl the name of the current thread:
1155 dnl glibc: int pthread_setname_np(pthread_t, const char *name);
1156 dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
1157 dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
1159 dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
1160 dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
1163 dnl This macro defines:
1165 dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
1166 dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
1167 dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
1168 AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
1169 [AC_CHECK_FUNCS([pthread_set_name_np])
1170 if test $ac_cv_func_pthread_set_name_np != yes; then
1172 [for pthread_setname_np() variant],
1173 [ovs_cv_pthread_setname_np],
1175 [AC_LANG_PROGRAM([#include <pthread.h>
1176 ], [pthread_setname_np(pthread_self(), "name");])],
1177 [ovs_cv_pthread_setname_np=glibc],
1179 [AC_LANG_PROGRAM([#include <pthread.h>
1180 ], [pthread_setname_np(pthread_self(), "%s", "name");])],
1181 [ovs_cv_pthread_setname_np=netbsd],
1182 [ovs_cv_pthread_setname_np=none])])])
1183 case $ovs_cv_pthread_setname_np in # (
1186 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
1187 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
1191 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
1192 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
1197 dnl OVS_CHECK_LINUX_HOST.
1199 dnl Checks whether we're building for a Linux host, based on the presence of
1200 dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
1201 dnl LINUX based on the result.
1202 AC_DEFUN([OVS_CHECK_LINUX_HOST],
1204 [whether __linux__ is defined],
1207 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
1208 [ovs_cv_linux=true],
1209 [ovs_cv_linux=false])])
1210 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])