3 # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 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 15; then
157 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.15.x is not supported (please refer to the FAQ for advice)])
159 elif test "$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_FLAGS_FRAG_IS_FIRST;
183 [AC_DEFINE([HAVE_TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST], [1],
184 [Define to 1 if TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST is avaiable.])])
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 avaiable.])])
194 AC_LANG_PROGRAM([#include <linux/tc_act/tc_tunnel_key.h>], [
195 int x = TCA_TUNNEL_KEY_ENC_DST_PORT;
197 [AC_DEFINE([HAVE_TCA_TUNNEL_KEY_ENC_DST_PORT], [1],
198 [Define to 1 if TCA_TUNNEL_KEY_ENC_DST_PORT is avaiable.])])
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 avaiable.])])
210 dnl Configure DPDK source tree
211 AC_DEFUN([OVS_CHECK_DPDK], [
213 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
214 [Specify the DPDK build directory])],
217 AC_MSG_CHECKING([whether dpdk datapath is enabled])
218 if test "$have_dpdk" != true || test "$with_dpdk" = no; then
225 DPDK_AUTO_DISCOVER="true"
226 PKG_CHECK_MODULES([DPDK], [libdpdk],
227 [DPDK_INCLUDE="$DPDK_CFLAGS"],
228 [DPDK_INCLUDE="-I/usr/local/include/dpdk -I/usr/include/dpdk"])
231 DPDK_AUTO_DISCOVER="false"
232 DPDK_INCLUDE_PATH="$with_dpdk/include"
233 # If 'with_dpdk' is passed install directory, point to headers
234 # installed in $DESTDIR/$prefix/include/dpdk
235 if test -e "$DPDK_INCLUDE_PATH/rte_config.h"; then
236 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH"
237 elif test -e "$DPDK_INCLUDE_PATH/dpdk/rte_config.h"; then
238 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH/dpdk"
240 DPDK_LIB_DIR="$with_dpdk/lib"
247 ovs_save_CFLAGS="$CFLAGS"
248 ovs_save_LDFLAGS="$LDFLAGS"
249 CFLAGS="$CFLAGS $DPDK_INCLUDE"
250 if test "$DPDK_AUTO_DISCOVER" = "false"; then
251 LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
257 #include <rte_config.h>
258 #if RTE_LIBRTE_VHOST_NUMA
263 [AC_SEARCH_LIBS([get_mempolicy],[numa],[],[AC_MSG_ERROR([unable to find libnuma, install the dependency package])])
264 DPDK_EXTRA_LIB="-lnuma"
265 AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])])
270 #include <rte_config.h>
271 #if RTE_LIBRTE_PMD_PCAP
276 [AC_SEARCH_LIBS([pcap_dump],[pcap],[],[AC_MSG_ERROR([unable to find libpcap, install the dependency package])])
277 DPDK_EXTRA_LIB="-lpcap"
281 #include <rte_config.h>
287 [AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])])
290 # On some systems we have to add -ldl to link with dpdk
292 # This code, at first, tries to link without -ldl (""),
293 # then adds it and tries again.
294 # Before each attempt the search cache must be unset,
295 # otherwise autoconf will stick with the old result
299 for extras in "" "-ldl"; do
300 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
302 [AC_LANG_PROGRAM([#include <rte_config.h>
303 #include <rte_eal.h>],
304 [int rte_argc; char ** rte_argv;
305 rte_eal_init(rte_argc, rte_argv);])],
306 [DPDKLIB_FOUND=true])
307 if $DPDKLIB_FOUND; then
312 # If linking unsuccessful
313 if test "$DPDKLIB_FOUND" = "false" ; then
314 if $DPDK_AUTO_DISCOVER; then
315 AC_MSG_ERROR([Could not find DPDK library in default search path, Use --with-dpdk to specify the DPDK library installed in non-standard location])
317 AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
320 CFLAGS="$ovs_save_CFLAGS"
321 LDFLAGS="$ovs_save_LDFLAGS"
322 if test "$DPDK_AUTO_DISCOVER" = "false"; then
323 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
325 OVS_CFLAGS="$OVS_CFLAGS $DPDK_INCLUDE"
326 OVS_ENABLE_OPTION([-mssse3])
328 # DPDK pmd drivers are not linked unless --whole-archive is used.
330 # This happens because the rest of the DPDK code doesn't use any symbol in
331 # the pmd driver objects, and the drivers register themselves using an
332 # __attribute__((constructor)) function.
334 # These options are specified inside a single -Wl directive to prevent
335 # autotools from reordering them.
336 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
337 AC_SUBST([DPDK_vswitchd_LDFLAGS])
338 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
341 AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
344 dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
346 dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
347 dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
348 dnl <REGEX> translated to uppercase.
349 AC_DEFUN([OVS_GREP_IFELSE], [
350 AC_MSG_CHECKING([whether $2 matches in $1])
352 grep '$2' $1 >/dev/null 2>&1
357 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
364 AC_MSG_ERROR([grep exited with status $status])
368 AC_MSG_RESULT([file not found])
373 dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
375 dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
376 dnl structure definition. If this is successful, runs IF-MATCH, otherwise
377 dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
378 dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
379 dnl translated to uppercase.
380 AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
381 AC_MSG_CHECKING([whether $2 has member $3 in $1])
383 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
388 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
395 AC_MSG_ERROR([grep exited with status $status])
399 AC_MSG_RESULT([file not found])
404 dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
406 dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
407 dnl the function signature starting from the line matching FUNCTION
408 dnl and ending with the line containing the closing parenthesis. If
409 dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
410 dnl IF-MATCH is empty then it defines to
411 dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
412 dnl <REGEX> translated to uppercase.
413 AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
414 AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
416 awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
421 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
428 AC_MSG_ERROR([grep exited with status $status])
432 AC_MSG_RESULT([file not found])
439 dnl Defines NAME to 1 in kcompat.h.
440 AC_DEFUN([OVS_DEFINE], [
441 echo '#define $1 1' >> datapath/linux/kcompat.h.new
444 dnl OVS_CHECK_LINUX_COMPAT
446 dnl Runs various Autoconf checks on the Linux kernel source in
447 dnl the directory in $KBUILD.
448 AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
449 rm -f datapath/linux/kcompat.h.new
450 mkdir -p datapath/linux
451 : > datapath/linux/kcompat.h.new
453 echo '#include <linux/version.h>
454 #ifndef RHEL_RELEASE_CODE
455 #define RHEL_RELEASE_CODE 0
456 #define RHEL_RELEASE_VERSION(a, b) 0
457 #endif' >> datapath/linux/kcompat.h.new
459 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
460 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
462 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
463 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
464 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
466 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
467 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
468 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
470 OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [DEFINE_STATIC_KEY_FALSE],
471 [OVS_DEFINE([HAVE_UPSTREAM_STATIC_KEY])])
473 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
474 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
476 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
477 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
478 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
479 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
480 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
482 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
483 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
484 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
485 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
486 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
487 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
489 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
490 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
491 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
492 [OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
493 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
494 [ip_do_fragment], [net],
495 [OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
496 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
497 [ip_local_out], [net],
498 [OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
500 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
502 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
503 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
504 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
505 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
506 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
507 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
508 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
509 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
510 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
511 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
513 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
515 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
517 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
518 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
519 [sub_frag_mem_limit], [struct.netns_frags],
520 [OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
521 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
522 [OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
523 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
524 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
526 dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
527 dnl OVS does not really need ipv6 label field, but its presence signifies that
528 dnl the stack has all required ipv6 support.
529 dnl OVS also does not need dst_cache But this dependency allows us to write
530 dnl much cleaner code.
532 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
534 [OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
535 [iptunnel_pull_offloads],
536 [OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
537 [OVS_GREP_IFELSE([$KSRC/include/net/erspan.h], [erspan_md2],
538 [OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])])
540 OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
541 [OVS_DEFINE([USE_BUILTIN_DST_CACHE])])
542 OVS_GREP_IFELSE([$KSRC/include/net/mpls.h], [mpls_hdr],
543 [OVS_DEFINE([MPLS_HEADER_IS_L3])])
544 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
545 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
546 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
547 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
548 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
549 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
550 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
551 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
552 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_gso_error_unwind])
553 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
554 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
555 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
556 [OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
557 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
558 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
559 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
560 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
561 dnl So check type of tstats.
562 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
563 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
564 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
565 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
566 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_csum_hwoffload_help])
567 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
568 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
569 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
570 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
571 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
572 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
574 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
575 [netdev_master_upper_dev_link], [upper_priv],
576 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
577 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
578 [netdev_master_upper_dev_link_rh],
579 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_RH])])
581 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
583 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops_extended],
584 [ndo_change_mtu], [OVS_DEFINE([HAVE_RHEL7_MAX_MTU])])
586 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
587 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
588 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
589 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
590 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
591 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
592 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
593 [owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
594 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [NFPROTO_INET])
597 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
598 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
600 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
601 [nf_conn], [struct timer_list[[ \t]]*timeout],
602 [OVS_DEFINE([HAVE_NF_CONN_TIMER])])
603 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
604 [nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
606 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
607 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
608 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
609 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
610 [nf_ct_get_tuplepr], [struct.net],
611 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
612 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
614 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
615 [nf_ct_is_untracked])
616 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
618 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_l3proto.h],
620 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
622 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
623 [nf_connlabels_get], [int bit],
624 [OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
625 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
626 [nf_conn_labels], [words])
627 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
628 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
629 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_range2])
630 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
631 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_count.h], [nf_conncount_gc_list],
632 [OVS_DEFINE([HAVE_UPSTREAM_NF_CONNCOUNT])])
634 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
635 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
637 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
638 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
639 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
640 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
641 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
643 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
644 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
645 [rcu_read_lock_held])])
646 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
647 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [net_rwsem])
649 # Check for the proto_data_valid member in struct sk_buff. The [^@]
650 # is necessary because some versions of this header remove the
651 # member but retain the kerneldoc comment that describes it (which
652 # starts with @). The brackets must be doubled because of m4
654 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
655 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
656 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
657 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
658 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
659 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
660 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
661 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
662 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
663 [OVS_DEFINE([HAVE_U16_RXHASH])])
664 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
665 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
666 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
667 [skb_copy_from_linear_data_offset])
668 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
669 [skb_reset_tail_pointer])
670 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
671 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
672 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
673 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
674 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
675 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
676 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
677 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
678 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
679 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
680 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
681 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
682 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
683 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
684 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
685 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
686 [OVS_DEFINE([HAVE_L4_RXHASH])])
687 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
688 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
689 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
690 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
691 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
692 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
693 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
694 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
695 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_put_zero])
697 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
698 [OVS_DEFINE([HAVE_BOOL_TYPE])])
699 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
700 [OVS_DEFINE([HAVE_CSUM_TYPES])])
701 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
702 [OVS_DEFINE([HAVE_CSUM_TYPES])])
704 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
705 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
707 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
708 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
710 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
711 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
712 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
713 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
714 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
715 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
716 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
717 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
718 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
719 [genl_notify], [net],
720 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
723 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
724 [genl_multicast_group], [id])
725 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
727 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
728 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
729 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
730 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
731 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
732 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
733 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
734 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
735 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
737 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
738 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
739 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
740 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
741 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
742 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
743 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
744 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
745 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
746 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
747 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
748 [nla_parse], [netlink_ext_ack],
749 [OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
751 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
753 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
754 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
755 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
756 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
757 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
758 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
759 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
761 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/dst_metadata.h],
762 [metadata_dst_alloc], [metadata_type])
764 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
766 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
767 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
768 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
769 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
770 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
771 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
772 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
773 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
774 [OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
775 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
778 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
779 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
780 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
781 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
783 OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
784 OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
785 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
786 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
787 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
788 [udp_add_offload], [net],
789 [OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
790 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
791 [nf_defrag_ipv6_enable], [net],
792 [OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
793 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [family_list],
794 [OVS_DEFINE([HAVE_GENL_FAMILY_LIST])])
795 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
797 [OVS_DEFINE([HAVE_NEEDS_FREE_NETDEV])])
798 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_dev], [cfg],
799 [OVS_DEFINE([HAVE_VXLAN_DEV_CFG])])
800 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
801 [nf_conntrack_helper_put],
802 [OVS_DEFINE(HAVE_NF_CONNTRACK_HELPER_PUT)])
803 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],[[[[:space:]]]SKB_GSO_UDP[[[:space:]]]],
804 [OVS_DEFINE([HAVE_SKB_GSO_UDP])])
805 OVS_GREP_IFELSE([$KSRC/include/net/dst.h],[DST_NOCACHE],
806 [OVS_DEFINE([HAVE_DST_NOCACHE])])
807 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_link_ops],
809 [OVS_DEFINE([HAVE_EXT_ACK_IN_RTNL_LINKOPS])])
810 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
812 [OVS_DEFINE([HAVE_LIST_IN_NF_HOOK_OPS])])
813 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netfilter/nf_conntrack_common.h],
815 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
816 [netdev_master_upper_dev_link], [extack],
817 [OVS_DEFINE([HAVE_UPPER_DEV_LINK_EXTACK])])
818 OVS_GREP_IFELSE([$KSRC/include/linux/compiler_types.h],
819 [__LINUX_COMPILER_TYPES_H],
820 [OVS_DEFINE([HAVE_LINUX_COMPILER_TYPES_H])])
821 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
823 [OVS_DEFINE([HAVE_KTIME_GET_TS64])])
824 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h],
825 [EXPORT_SYMBOL_GPL(peernet2id_alloc)],
826 [OVS_DEFINE([HAVE_PEERNET2ID_ALLOC])])
827 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
829 [OVS_DEFINE([HAVE_KTIME_GET_NS])])
830 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h],
831 frag_percpu_counter_batch[],
832 [OVS_DEFINE([HAVE_FRAG_PERCPU_COUNTER_BATCH])])
833 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
834 [null_compute_pseudo],
835 [OVS_DEFINE([HAVE_NULL_COMPUTE_PSEUDO])])
836 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
837 [__skb_checksum_convert],
838 [OVS_DEFINE([HAVE_SKB_CHECKSUM_CONVERT])])
839 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
841 [OVS_DEFINE([HAVE_NET_DEVICE_MAX_MTU])])
842 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip6_tunnel.h], [__ip6_tnl_parm],
844 [OVS_DEFINE([HAVE_IP6_TNL_PARM_ERSPAN_VER])])
845 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
847 [OVS_DEFINE([HAVE_SKB_GSO_IPXIP6])])
848 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ipv6.h],
849 [ip6_make_flowlabel], [fl6],
850 [OVS_DEFINE([HAVE_IP6_MAKE_FLOWLABEL_FL6])])
851 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ipv6.h], [netns_sysctl_ipv6],
853 [OVS_DEFINE([HAVE_NETNS_SYSCTL_IPV6_AUTO_FLOWLABELS])])
854 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
856 [OVS_DEFINE([HAVE_NETIF_KEEP_DST])])
857 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
859 [OVS_DEFINE([HAVE_NDO_GET_IFLINK])])
860 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
861 [skb_set_inner_ipproto],
862 [OVS_DEFINE([HAVE_SKB_SET_INNER_IPPROTO])])
863 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
864 [tunnel_encap_types],
865 [OVS_DEFINE([HAVE_TUNNEL_ENCAP_TYPES])])
866 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
867 [IFLA_IPTUN_ENCAP_TYPE],
868 [OVS_DEFINE([HAVE_IFLA_IPTUN_ENCAP_TYPE])])
869 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
870 [IFLA_IPTUN_COLLECT_METADATA],
871 [OVS_DEFINE([HAVE_IFLA_IPTUN_COLLECT_METADATA])])
872 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
873 [IFLA_GRE_ENCAP_DPORT])
874 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
875 [IFLA_GRE_COLLECT_METADATA])
876 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
877 [IFLA_GRE_IGNORE_DF])
878 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
880 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
881 [IFLA_GRE_ERSPAN_INDEX])
882 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
883 [IFLA_GRE_ERSPAN_HWID])
884 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
886 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/skbuff.h], [sk_buff],
888 [OVS_DEFINE([HAVE_SKBUFF_CSUM_VALID])])
889 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
890 [skb_checksum_simple_validate])
891 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
892 [void.*ndo_get_stats64],
893 [OVS_DEFINE([HAVE_VOID_NDO_GET_STATS64])])
894 OVS_GREP_IFELSE([$KSRC/include/linux/timer.h], [init_timer_deferrable],
895 [OVS_DEFINE([HAVE_INIT_TIMER_DEFERRABLE])])
897 if cmp -s datapath/linux/kcompat.h.new \
898 datapath/linux/kcompat.h >/dev/null 2>&1; then
899 rm datapath/linux/kcompat.h.new
901 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
905 dnl Checks for net/if_packet.h.
906 AC_DEFUN([OVS_CHECK_IF_PACKET],
907 [AC_CHECK_HEADER([net/if_packet.h],
908 [HAVE_IF_PACKET=yes],
910 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
911 if test "$HAVE_IF_PACKET" = yes; then
912 AC_DEFINE([HAVE_IF_PACKET], [1],
913 [Define to 1 if net/if_packet.h is available.])
916 dnl Checks for net/if_dl.h.
918 dnl (We use this as a proxy for checking whether we're building on FreeBSD
920 AC_DEFUN([OVS_CHECK_IF_DL],
921 [AC_CHECK_HEADER([net/if_dl.h],
924 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
925 if test "$HAVE_IF_DL" = yes; then
926 AC_DEFINE([HAVE_IF_DL], [1],
927 [Define to 1 if net/if_dl.h is available.])
929 # On these platforms we use libpcap to access network devices.
930 AC_SEARCH_LIBS([pcap_open_live], [pcap])
933 dnl Checks for buggy strtok_r.
935 dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
936 dnl with optimization that can cause segfaults:
938 dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
939 AC_DEFUN([OVS_CHECK_STRTOK_R],
941 [whether strtok_r macro segfaults on some inputs],
942 [ovs_cv_strtok_r_bug],
944 [AC_LANG_PROGRAM([#include <stdio.h>
947 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
948 /* Assume bug is present, because relatively minor
949 changes in compiler settings (e.g. optimization
950 level) can make it crop up. */
953 char string[] = ":::";
954 char *save_ptr = (char *) 0xc0ffee;
955 char *token1, *token2;
956 token1 = strtok_r(string, ":", &save_ptr);
957 token2 = strtok_r(NULL, ":", &save_ptr);
958 freopen ("/dev/null", "w", stdout);
959 printf ("%s %s\n", token1, token2);
963 [ovs_cv_strtok_r_bug=no],
964 [ovs_cv_strtok_r_bug=yes],
965 [ovs_cv_strtok_r_bug=yes])])
966 if test $ovs_cv_strtok_r_bug = yes; then
967 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
968 [Define if strtok_r macro segfaults on some inputs])
972 dnl ----------------------------------------------------------------------
973 dnl These macros are from GNU PSPP, with the following original license:
974 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
975 dnl This file is free software; the Free Software Foundation
976 dnl gives unlimited permission to copy and/or distribute it,
977 dnl with or without modifications, as long as this notice is preserved.
979 AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
980 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
981 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
982 [ovs_save_CFLAGS="$CFLAGS"
983 dnl Include -Werror in the compiler options, because without -Werror
984 dnl clang's GCC-compatible compiler driver does not return a failure
985 dnl exit status even though it complains about options it does not
988 dnl Also, check stderr as gcc exits with status 0 for options
989 dnl rejected at getopt level.
991 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
992 dnl gcc: unrecognized option '-Qunused-arguments'
995 CFLAGS="$CFLAGS $WERROR $1"
997 [AC_LANG_SOURCE([int x;])],
998 [if test -s conftest.err && grep "unrecognized option" conftest.err
1005 CFLAGS="$ovs_save_CFLAGS"])
1006 if test $ovs_cv_name = yes; then
1007 m4_if([$2], [], [:], [$2])
1009 m4_if([$3], [], [:], [$3])
1013 dnl OVS_CHECK_WERROR
1015 dnl Check whether the C compiler accepts -Werror.
1016 dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
1017 AC_DEFUN([OVS_CHECK_WERROR],
1019 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
1021 dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
1022 dnl Check whether the given C compiler OPTION is accepted.
1023 dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
1024 AC_DEFUN([OVS_CHECK_CC_OPTION],
1025 [AC_REQUIRE([OVS_CHECK_WERROR])
1026 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
1028 dnl OVS_ENABLE_OPTION([OPTION])
1029 dnl Check whether the given C compiler OPTION is accepted.
1030 dnl If so, add it to WARNING_FLAGS.
1031 dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
1032 AC_DEFUN([OVS_ENABLE_OPTION],
1033 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
1034 AC_SUBST([WARNING_FLAGS])])
1036 dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
1037 dnl Check whether the given C compiler OPTION is accepted.
1038 dnl If so, enable the given Automake CONDITIONAL.
1040 dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
1041 AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
1042 [OVS_CHECK_CC_OPTION(
1043 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
1044 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
1045 dnl ----------------------------------------------------------------------
1047 dnl Check for too-old XenServer.
1048 AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
1049 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
1050 [if test -e /etc/redhat-release; then
1051 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
1053 if test -z "$ovs_cv_xsversion"; then
1054 ovs_cv_xsversion=none
1056 case $ovs_cv_xsversion in
1060 [[1-9]][[0-9]]* | dnl XenServer 10 or later
1061 [[6-9]]* | dnl XenServer 6 or later
1062 5.[[7-9]]* | dnl XenServer 5.7 or later
1063 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
1064 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
1065 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
1069 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
1073 dnl OVS_CHECK_SPARSE_TARGET
1075 dnl The "cgcc" script from "sparse" isn't very good at detecting the
1076 dnl target for which the code is being built. This helps it out.
1077 AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
1079 [target hint for cgcc],
1080 [ac_cv_sparse_target],
1081 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
1082 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
1083 [x86_64-*], [ac_cv_sparse_target=x86_64],
1084 [ac_cv_sparse_target=other])])
1085 AS_CASE([$ac_cv_sparse_target],
1086 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
1087 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
1088 [SPARSEFLAGS= CGCCFLAGS=])
1089 AC_SUBST([SPARSEFLAGS])
1090 AC_SUBST([CGCCFLAGS])])
1092 dnl OVS_SPARSE_EXTRA_INCLUDES
1094 dnl The cgcc script from "sparse" does not search gcc's default
1095 dnl search path. Get the default search path from GCC and pass
1097 AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
1098 AC_SUBST([SPARSE_EXTRA_INCLUDES],
1099 [`$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 ' ' `] ))
1101 dnl OVS_ENABLE_SPARSE
1102 AC_DEFUN([OVS_ENABLE_SPARSE],
1103 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
1104 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
1107 AC_CONFIG_COMMANDS_PRE(
1108 [CC='$(if $(C:0=),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) $(SPARSE_WERROR) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])
1112 [AC_HELP_STRING([--enable-sparse], [Run "sparse" by default])],
1113 [], [enable_sparse=no])
1114 AM_CONDITIONAL([ENABLE_SPARSE_BY_DEFAULT], [test $enable_sparse = yes])])
1116 dnl OVS_CTAGS_IDENTIFIERS
1118 dnl ctags ignores symbols with extras identifiers. This builds a list of
1119 dnl specially handled identifiers to be ignored.
1120 AC_DEFUN([OVS_CTAGS_IDENTIFIERS],
1121 AC_SUBST([OVS_CTAGS_IDENTIFIERS_LIST],
1122 [`printf %s '-I "'; sed -n 's/^#define \(OVS_[A-Z_]\+\)(\.\.\.)$/\1+/p' ${srcdir}/include/openvswitch/compiler.h | tr \\\n ' ' ; printf '"'`] ))
1124 dnl OVS_PTHREAD_SET_NAME
1126 dnl This checks for three known variants of pthreads functions for setting
1127 dnl the name of the current thread:
1129 dnl glibc: int pthread_setname_np(pthread_t, const char *name);
1130 dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
1131 dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
1133 dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
1134 dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
1137 dnl This macro defines:
1139 dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
1140 dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
1141 dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
1142 AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
1143 [AC_CHECK_FUNCS([pthread_set_name_np])
1144 if test $ac_cv_func_pthread_set_name_np != yes; then
1146 [for pthread_setname_np() variant],
1147 [ovs_cv_pthread_setname_np],
1149 [AC_LANG_PROGRAM([#include <pthread.h>
1150 ], [pthread_setname_np(pthread_self(), "name");])],
1151 [ovs_cv_pthread_setname_np=glibc],
1153 [AC_LANG_PROGRAM([#include <pthread.h>
1154 ], [pthread_setname_np(pthread_self(), "%s", "name");])],
1155 [ovs_cv_pthread_setname_np=netbsd],
1156 [ovs_cv_pthread_setname_np=none])])])
1157 case $ovs_cv_pthread_setname_np in # (
1160 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
1161 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
1165 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
1166 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
1171 dnl OVS_CHECK_LINUX_HOST.
1173 dnl Checks whether we're building for a Linux host, based on the presence of
1174 dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
1175 dnl LINUX based on the result.
1176 AC_DEFUN([OVS_CHECK_LINUX_HOST],
1178 [whether __linux__ is defined],
1181 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
1182 [ovs_cv_linux=true],
1183 [ovs_cv_linux=false])])
1184 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])