3 # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 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"
30 dnl Configure linux kernel source tree
31 AC_DEFUN([OVS_CHECK_LINUX], [
33 [AC_HELP_STRING([--with-linux=/path/to/linux],
34 [Specify the Linux kernel build directory])])
35 AC_ARG_WITH([linux-source],
36 [AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
37 [Specify the Linux kernel source directory
38 (usually figured out automatically from build
41 # Deprecated equivalents to --with-linux, --with-linux-source.
43 AC_ARG_WITH([l26-source])
45 if test X"$with_linux" != X; then
47 elif test X"$with_l26" != X; then
49 AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
54 if test X"$KBUILD" != X; then
55 if test X"$with_linux_source" != X; then
56 KSRC=$with_linux_source
57 elif test X"$with_l26_source" != X; then
59 AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
63 elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
64 AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
67 if test -n "$KBUILD"; then
68 KBUILD=`eval echo "$KBUILD"`
71 *) KBUILD=`pwd`/$KBUILD ;;
74 # The build directory is what the user provided.
75 # Make sure that it exists.
76 AC_MSG_CHECKING([for Linux build directory])
77 if test -d "$KBUILD"; then
78 AC_MSG_RESULT([$KBUILD])
82 AC_ERROR([source dir $KBUILD doesn't exist])
85 # Debian breaks kernel headers into "source" header and "build" headers.
86 # We want the source headers, but $KBUILD gives us the "build" headers.
87 # Use heuristics to find the source headers.
88 AC_MSG_CHECKING([for Linux source directory])
89 if test -n "$KSRC"; then
90 KSRC=`eval echo "$KSRC"`
93 *) KSRC=`pwd`/$KSRC ;;
95 if test ! -e $KSRC/include/linux/kernel.h; then
96 AC_MSG_ERROR([$KSRC is not a kernel source directory])
100 if test ! -e $KSRC/include/linux/kernel.h; then
101 # Debian kernel build Makefiles tend to include a line of the form:
102 # MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
103 # First try to extract the source directory from this line.
104 KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
105 if test ! -e "$KSRC"/include/linux/kernel.h; then
106 # Didn't work. Fall back to name-based heuristics that used to work.
107 case `echo "$KBUILD" | sed 's,/*$,,'` in # (
109 KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
112 KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
117 if test ! -e "$KSRC"/include/linux/kernel.h; then
118 AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
121 AC_MSG_RESULT([$KSRC])
123 AC_MSG_CHECKING([for kernel version])
124 version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
125 patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
126 sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
127 if test X"$version" = X || test X"$patchlevel" = X; then
128 AC_ERROR([cannot determine kernel version])
129 elif test X"$sublevel" = X; then
130 kversion=$version.$patchlevel
132 kversion=$version.$patchlevel.$sublevel
134 AC_MSG_RESULT([$kversion])
136 if test "$version" -ge 4; then
137 if test "$version" = 4 && test "$patchlevel" -le 3; then
140 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.3.x is not supported (please refer to the FAQ for advice)])
142 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
145 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
147 if (test ! -e "$KBUILD"/include/linux/version.h && \
148 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
149 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
150 test ! -e "$KBUILD"/include/generated/autoconf.h); then
151 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
153 OVS_CHECK_LINUX_COMPAT
155 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
160 dnl Configure DPDK source tree
161 AC_DEFUN([OVS_CHECK_DPDK], [
163 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
164 [Specify the DPDK build directory])],
167 AC_MSG_CHECKING([whether dpdk datapath is enabled])
168 if test "$have_dpdk" != true || test "$with_dpdk" = no; then
175 DPDK_AUTO_DISCOVER="true"
176 DPDK_INCLUDE="/usr/local/include/dpdk -I/usr/include/dpdk"
179 DPDK_AUTO_DISCOVER="false"
180 DPDK_INCLUDE="$with_dpdk/include"
181 # If 'with_dpdk' is passed install directory, point to headers
182 # installed in $DESTDIR/$prefix/include/dpdk
183 AC_CHECK_FILE([$DPDK_INCLUDE/rte_config.h], [],
184 [AC_CHECK_FILE([$DPDK_INCLUDE/dpdk/rte_config.h],
185 [DPDK_INCLUDE=$DPDK_INCLUDE/dpdk], [])])
186 DPDK_LIB_DIR="$with_dpdk/lib"
193 ovs_save_CFLAGS="$CFLAGS"
194 ovs_save_LDFLAGS="$LDFLAGS"
195 CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
196 if test "$DPDK_AUTO_DISCOVER" = "false"; then
197 LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
203 #include <rte_config.h>
204 #if !RTE_LIBRTE_VHOST_USER
209 [AC_DEFINE([VHOST_CUSE], [1], [DPDK vhost-cuse support enabled, vhost-user disabled.])
210 DPDK_EXTRA_LIB="-lfuse"])
212 # On some systems we have to add -ldl to link with dpdk
214 # This code, at first, tries to link without -ldl (""),
215 # then adds it and tries again.
216 # Before each attempt the search cache must be unset,
217 # otherwise autoconf will stick with the old result
221 for extras in "" "-ldl"; do
222 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB -lnuma"
224 [AC_LANG_PROGRAM([#include <rte_config.h>
225 #include <rte_eal.h>],
226 [int rte_argc; char ** rte_argv;
227 rte_eal_init(rte_argc, rte_argv);])],
228 [DPDKLIB_FOUND=true])
229 if $DPDKLIB_FOUND; then
234 # If linking unsuccessful
235 if test "$DPDKLIB_FOUND" = "false" ; then
236 if $DPDK_AUTO_DISCOVER; then
237 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])
239 AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
242 CFLAGS="$ovs_save_CFLAGS"
243 LDFLAGS="$ovs_save_LDFLAGS"
244 if test "$DPDK_AUTO_DISCOVER" = "false"; then
245 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
247 OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE"
248 OVS_ENABLE_OPTION([-mssse3])
250 # DPDK pmd drivers are not linked unless --whole-archive is used.
252 # This happens because the rest of the DPDK code doesn't use any symbol in
253 # the pmd driver objects, and the drivers register themselves using an
254 # __attribute__((constructor)) function.
256 # These options are specified inside a single -Wl directive to prevent
257 # autotools from reordering them.
258 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
259 AC_SUBST([DPDK_vswitchd_LDFLAGS])
260 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
263 AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
266 dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
268 dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
269 dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
270 dnl <REGEX> translated to uppercase.
271 AC_DEFUN([OVS_GREP_IFELSE], [
272 AC_MSG_CHECKING([whether $2 matches in $1])
274 grep '$2' $1 >/dev/null 2>&1
279 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
286 AC_MSG_ERROR([grep exited with status $status])
290 AC_MSG_RESULT([file not found])
295 dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
297 dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
298 dnl structure definition. If this is successful, runs IF-MATCH, otherwise
299 dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
300 dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
301 dnl translated to uppercase.
302 AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
303 AC_MSG_CHECKING([whether $2 has member $3 in $1])
305 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
310 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
317 AC_MSG_ERROR([grep exited with status $status])
321 AC_MSG_RESULT([file not found])
326 dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
328 dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
329 dnl the function signature starting from the line matching FUNCTION
330 dnl and ending with the line containing the closing parenthesis. If
331 dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
332 dnl IF-MATCH is empty then it defines to
333 dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
334 dnl <REGEX> translated to uppercase.
335 AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
336 AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
338 awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
343 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
350 AC_MSG_ERROR([grep exited with status $status])
354 AC_MSG_RESULT([file not found])
361 dnl Defines NAME to 1 in kcompat.h.
362 AC_DEFUN([OVS_DEFINE], [
363 echo '#define $1 1' >> datapath/linux/kcompat.h.new
366 dnl OVS_CHECK_LINUX_COMPAT
368 dnl Runs various Autoconf checks on the Linux kernel source in
369 dnl the directory in $KBUILD.
370 AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
371 rm -f datapath/linux/kcompat.h.new
372 mkdir -p datapath/linux
373 : > datapath/linux/kcompat.h.new
375 echo '#include <linux/version.h>
376 #ifndef RHEL_RELEASE_CODE
377 #define RHEL_RELEASE_CODE 0
378 #define RHEL_RELEASE_VERSION(a, b) 0
379 #endif' >> datapath/linux/kcompat.h.new
381 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
382 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
384 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
385 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
386 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
388 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
389 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
391 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
392 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
394 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
395 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
396 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
397 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
398 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
400 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
401 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
402 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
403 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
404 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
405 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
407 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
408 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
409 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
410 [OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
411 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_do_fragment])
412 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
414 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
415 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
416 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
417 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
418 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
419 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
420 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
421 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
422 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
424 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
426 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
428 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
429 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
431 OVS_GREP_IFELSE([$KSRC/include/net/dst_metadata.h], [metadata_dst])
433 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
434 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
435 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
436 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
437 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
438 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
439 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
440 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
441 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
442 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
443 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
444 dnl So check type of tstats.
445 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
446 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
447 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
448 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
449 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
450 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
451 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
452 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
454 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
455 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
456 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
457 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
458 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
459 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
461 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
462 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
463 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
464 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
465 [nf_ct_get_tuplepr], [struct.net],
466 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
467 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
469 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
471 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
472 [nf_ct_frag6_consume_orig])
473 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
474 [nf_ct_frag6_output])
475 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
476 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
477 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
479 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
480 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
482 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
483 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
484 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
485 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
486 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
488 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
489 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
490 [rcu_read_lock_held])])
491 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
493 # Check for the proto_data_valid member in struct sk_buff. The [^@]
494 # is necessary because some versions of this header remove the
495 # member but retain the kerneldoc comment that describes it (which
496 # starts with @). The brackets must be doubled because of m4
498 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
499 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
500 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
501 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
502 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_mac_header])
503 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_network_header])
504 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
505 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_scrub_packet.*xnet],
506 [OVS_DEFINE([HAVE_SKB_SCRUB_PACKET_XNET])])
507 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
508 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
509 [OVS_DEFINE([HAVE_U16_RXHASH])])
510 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
511 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
512 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
513 [skb_copy_from_linear_data_offset])
514 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
515 [skb_reset_tail_pointer])
516 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
517 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
518 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
519 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
520 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
521 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
522 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
523 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
524 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
525 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
526 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
527 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
528 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
529 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
530 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
531 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
532 [OVS_DEFINE([HAVE_L4_RXHASH])])
533 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
534 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
535 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
537 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
538 [OVS_DEFINE([HAVE_BOOL_TYPE])])
539 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
540 [OVS_DEFINE([HAVE_CSUM_TYPES])])
541 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
542 [OVS_DEFINE([HAVE_CSUM_TYPES])])
544 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
545 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
547 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
548 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
550 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
551 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
552 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
553 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_new_unicast])
554 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
555 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
556 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
557 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
558 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
560 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
561 [genl_multicast_group], [id])
562 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
564 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
565 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
566 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
567 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
568 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
569 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
570 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
571 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
572 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
574 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
575 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
576 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
577 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
578 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
579 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
580 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
581 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
582 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
584 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
586 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
587 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
588 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
589 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
590 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
592 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
594 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
595 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
596 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [VXLAN_HF_RCO])
597 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
598 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
599 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
600 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
601 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_set_csum])
602 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
603 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [ipv6_v6only],
604 [OVS_DEFINE([HAVE_UDP_TUNNEL_IPV6])])
606 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
607 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
608 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
609 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
611 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
612 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
614 if cmp -s datapath/linux/kcompat.h.new \
615 datapath/linux/kcompat.h >/dev/null 2>&1; then
616 rm datapath/linux/kcompat.h.new
618 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
622 dnl Checks for net/if_packet.h.
623 AC_DEFUN([OVS_CHECK_IF_PACKET],
624 [AC_CHECK_HEADER([net/if_packet.h],
625 [HAVE_IF_PACKET=yes],
627 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
628 if test "$HAVE_IF_PACKET" = yes; then
629 AC_DEFINE([HAVE_IF_PACKET], [1],
630 [Define to 1 if net/if_packet.h is available.])
633 dnl Checks for net/if_dl.h.
635 dnl (We use this as a proxy for checking whether we're building on FreeBSD
637 AC_DEFUN([OVS_CHECK_IF_DL],
638 [AC_CHECK_HEADER([net/if_dl.h],
641 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
642 if test "$HAVE_IF_DL" = yes; then
643 AC_DEFINE([HAVE_IF_DL], [1],
644 [Define to 1 if net/if_dl.h is available.])
646 # On these platforms we use libpcap to access network devices.
647 AC_SEARCH_LIBS([pcap_open_live], [pcap])
650 dnl Checks for buggy strtok_r.
652 dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
653 dnl with optimization that can cause segfaults:
655 dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
656 AC_DEFUN([OVS_CHECK_STRTOK_R],
658 [whether strtok_r macro segfaults on some inputs],
659 [ovs_cv_strtok_r_bug],
661 [AC_LANG_PROGRAM([#include <stdio.h>
664 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
665 /* Assume bug is present, because relatively minor
666 changes in compiler settings (e.g. optimization
667 level) can make it crop up. */
670 char string[] = ":::";
671 char *save_ptr = (char *) 0xc0ffee;
672 char *token1, *token2;
673 token1 = strtok_r(string, ":", &save_ptr);
674 token2 = strtok_r(NULL, ":", &save_ptr);
675 freopen ("/dev/null", "w", stdout);
676 printf ("%s %s\n", token1, token2);
680 [ovs_cv_strtok_r_bug=no],
681 [ovs_cv_strtok_r_bug=yes],
682 [ovs_cv_strtok_r_bug=yes])])
683 if test $ovs_cv_strtok_r_bug = yes; then
684 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
685 [Define if strtok_r macro segfaults on some inputs])
689 dnl ----------------------------------------------------------------------
690 dnl These macros are from GNU PSPP, with the following original license:
691 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
692 dnl This file is free software; the Free Software Foundation
693 dnl gives unlimited permission to copy and/or distribute it,
694 dnl with or without modifications, as long as this notice is preserved.
696 AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
697 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
698 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
699 [ovs_save_CFLAGS="$CFLAGS"
700 dnl Include -Werror in the compiler options, because without -Werror
701 dnl clang's GCC-compatible compiler driver does not return a failure
702 dnl exit status even though it complains about options it does not
705 dnl Also, check stderr as gcc exits with status 0 for options
706 dnl rejected at getopt level.
708 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
709 dnl gcc: unrecognized option '-Qunused-arguments'
712 CFLAGS="$CFLAGS $WERROR $1"
713 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep "unrecognized option" conftest.err; then ovs_cv_name[]=no; else ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
714 CFLAGS="$ovs_save_CFLAGS"])
715 if test $ovs_cv_name = yes; then
716 m4_if([$2], [], [:], [$2])
718 m4_if([$3], [], [:], [$3])
724 dnl Check whether the C compiler accepts -Werror.
725 dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
726 AC_DEFUN([OVS_CHECK_WERROR],
728 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
730 dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
731 dnl Check whether the given C compiler OPTION is accepted.
732 dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
733 AC_DEFUN([OVS_CHECK_CC_OPTION],
734 [AC_REQUIRE([OVS_CHECK_WERROR])
735 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
737 dnl OVS_ENABLE_OPTION([OPTION])
738 dnl Check whether the given C compiler OPTION is accepted.
739 dnl If so, add it to WARNING_FLAGS.
740 dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
741 AC_DEFUN([OVS_ENABLE_OPTION],
742 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
743 AC_SUBST([WARNING_FLAGS])])
745 dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
746 dnl Check whether the given C compiler OPTION is accepted.
747 dnl If so, enable the given Automake CONDITIONAL.
749 dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
750 AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
751 [OVS_CHECK_CC_OPTION(
752 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
753 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
754 dnl ----------------------------------------------------------------------
756 dnl Check for too-old XenServer.
757 AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
758 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
759 [if test -e /etc/redhat-release; then
760 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
762 if test -z "$ovs_cv_xsversion"; then
763 ovs_cv_xsversion=none
765 case $ovs_cv_xsversion in
769 [[1-9]][[0-9]]* | dnl XenServer 10 or later
770 [[6-9]]* | dnl XenServer 6 or later
771 5.[[7-9]]* | dnl XenServer 5.7 or later
772 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
773 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
774 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
778 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.)])
782 dnl OVS_MAKE_HAS_IF([if-true], [if-false])
784 dnl Checks whether make has the GNU make $(if condition,then,else) extension.
785 dnl Runs 'if-true' if so, 'if-false' otherwise.
786 AC_DEFUN([OVS_CHECK_MAKE_IF],
788 [whether ${MAKE-make} has GNU make \$(if) extension],
789 [ovs_cv_gnu_make_if],
790 [cat <<'EOF' > conftest.mk
792 echo $(if x,y,z) > conftest.out
796 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
797 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
798 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
799 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
800 result=`cat conftest.out`
801 rm -f conftest.mk conftest.out
802 if test "X$result" = "Xy"; then
803 ovs_cv_gnu_make_if=yes
805 ovs_cv_gnu_make_if=no
808 dnl OVS_CHECK_GNU_MAKE
810 dnl Checks whether make is GNU make (because Linux kernel Makefiles
811 dnl only work with GNU make).
812 AC_DEFUN([OVS_CHECK_GNU_MAKE],
814 [whether ${MAKE-make} is GNU make],
817 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
818 ${MAKE-make} --version >conftest.out 2>&1
819 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
820 result=`cat conftest.out`
821 rm -f conftest.mk conftest.out
824 GNU*) ovs_cv_gnu_make=yes ;; # (
825 *) ovs_cv_gnu_make=no ;;
827 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
829 dnl OVS_CHECK_SPARSE_TARGET
831 dnl The "cgcc" script from "sparse" isn't very good at detecting the
832 dnl target for which the code is being built. This helps it out.
833 AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
835 [target hint for cgcc],
836 [ac_cv_sparse_target],
837 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
838 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
839 [x86_64-*], [ac_cv_sparse_target=x86_64],
840 [ac_cv_sparse_target=other])])
841 AS_CASE([$ac_cv_sparse_target],
842 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
843 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
844 [SPARSEFLAGS= CGCCFLAGS=])
845 AC_SUBST([SPARSEFLAGS])
846 AC_SUBST([CGCCFLAGS])])
848 dnl OVS_SPARSE_EXTRA_INCLUDES
850 dnl The cgcc script from "sparse" does not search gcc's default
851 dnl search path. Get the default search path from GCC and pass
853 AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
854 AC_SUBST([SPARSE_EXTRA_INCLUDES],
855 [`$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 ' ' `] ))
857 dnl OVS_ENABLE_SPARSE
858 AC_DEFUN([OVS_ENABLE_SPARSE],
859 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
860 AC_REQUIRE([OVS_CHECK_MAKE_IF])
861 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
864 AC_CONFIG_COMMANDS_PRE(
865 [if test $ovs_cv_gnu_make_if = yes; then
866 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
869 dnl OVS_PTHREAD_SET_NAME
871 dnl This checks for three known variants of pthreads functions for setting
872 dnl the name of the current thread:
874 dnl glibc: int pthread_setname_np(pthread_t, const char *name);
875 dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
876 dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
878 dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
879 dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
882 dnl This macro defines:
884 dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
885 dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
886 dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
887 AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
888 [AC_CHECK_FUNCS([pthread_set_name_np])
889 if test $ac_cv_func_pthread_set_name_np != yes; then
891 [for pthread_setname_np() variant],
892 [ovs_cv_pthread_setname_np],
894 [AC_LANG_PROGRAM([#include <pthread.h>
895 ], [pthread_setname_np(pthread_self(), "name");])],
896 [ovs_cv_pthread_setname_np=glibc],
898 [AC_LANG_PROGRAM([#include <pthread.h>
899 ], [pthread_setname_np(pthread_self(), "%s", "name");])],
900 [ovs_cv_pthread_setname_np=netbsd],
901 [ovs_cv_pthread_setname_np=none])])])
902 case $ovs_cv_pthread_setname_np in # (
905 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
906 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
910 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
911 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
916 dnl OVS_CHECK_LINUX_HOST.
918 dnl Checks whether we're building for a Linux host, based on the presence of
919 dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
920 dnl LINUX based on the result.
921 AC_DEFUN([OVS_CHECK_LINUX_HOST],
923 [whether __linux__ is defined],
926 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
928 [ovs_cv_linux=false])])
929 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])