lnet/autoconf/lustre-lnet.m4

   1 # LN_CONFIG_BACKOFF
   2 #
   3 # check if tunable tcp backoff is available/wanted
   4 #
   5 AC_DEFUN([LN_CONFIG_BACKOFF], [
   6 AC_MSG_CHECKING([whether to enable tunable backoff TCP support])
   7 AC_ARG_ENABLE([backoff],
   8         AS_HELP_STRING([--disable-backoff],
   9                 [disable socknal tunable backoff]),
  10         [], [enable_backoff="yes"])
  11 AC_MSG_RESULT([$enable_backoff])
  12 AS_IF([test "x$enable_backoff" = xyes], [
  13         AC_MSG_CHECKING([if Linux kernel has tunable backoff TCP support])
  14         AS_IF([grep -c TCP_BACKOFF $LINUX/include/linux/tcp.h >/dev/null], [
  15                 AC_MSG_RESULT([yes])
  16                 AC_DEFINE(SOCKNAL_BACKOFF, 1, [use tunable backoff TCP])
  17                 AS_IF([grep rto_max $LINUX/include/linux/tcp.h | grep -q __u16 >/dev/null],
  18                         [AC_DEFINE(SOCKNAL_BACKOFF_MS, 1,
  19                                 [tunable backoff TCP in ms])])
  20         ], [
  21                 AC_MSG_RESULT([no])
  22         ])
  23
  24         AC_SUBST(ENABLE_BACKOFF, yes)
  25 ], [
  26         AC_SUBST(ENABLE_BACKOFF, no)
  27
  28 ])
  29 ]) # LN_CONFIG_BACKOFF
  30
  31 #
  32 # LN_CONFIG_DLC
  33 #
  34 # Configure dlc
  35 #
  36 # fail to build if libyaml is not installed
  37 #
  38 AC_DEFUN([LN_CONFIG_DLC], [
  39         AS_IF([test "x$enable_dist" = xno], [
  40                 AC_CHECK_LIB([yaml], [yaml_parser_initialize],
  41                              [LIBYAML="libyaml"],
  42                              [AC_MSG_ERROR([YAML development libraries not not installed])],
  43                              [-lm])
  44         ])
  45 ]) # LN_CONFIG_DLC
  46
  47 #
  48 # LN_CONFIG_O2IB
  49 #
  50 # If current OFED installed (assume with "ofed_info") and devel
  51 # headers are not found, error because we assume OFED infiniband
  52 # driver needs to be used and we must configure/build with it.
  53 # Current OFED headers detection mechanism allow for non-standard
  54 # prefix but relies on "ofed_info" command and on "%prefix/openib"
  55 # link (both are ok for 1.5.x and 3.x versions), and should work
  56 # for both source and DKMS builds.
  57 #
  58 AC_DEFUN([LN_CONFIG_O2IB], [
  59 AC_ARG_ENABLE([multiple-lnds],
  60         [AS_HELP_STRING([--enable-multiple-lnds],
  61                 [enable multiple lnds to build in-kernel and external o2iblnd])],
  62         [AS_IF([test x$enable_multiple_lnds != xyes -a x$enable_multiple_lnds != xno],
  63                 [AC_MSG_ERROR([multiple-lnds valid options are "yes" or "no"])])],
  64         [enable_multiple_lnds="no"])
  65         ENABLE_MULTIPLE_LNDS="$enable_multiple_lnds"
  66
  67 AC_MSG_CHECKING([if external o2iblnd needs to use Compat RDMA])
  68 AC_ARG_WITH([o2ib],
  69         AS_HELP_STRING([--with-o2ib=[yes|no|<path>]],
  70                 [build o2iblnd against path]),
  71         [], [with_o2ib="yes"])
  72
  73 case $with_o2ib in
  74         yes)    INT_O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
  75                 BUILT_IN_KO2IBLND="yes"
  76                 # Use ofed_info to find external driver
  77                 AS_IF([which ofed_info 2>/dev/null], [
  78                         AS_IF([test x$uses_dpkg = xyes], [
  79                                 LIST_ALL_PKG="dpkg -l | awk '{print \[$]2}'"
  80                                 LSPKG="dpkg --listfiles"
  81                         ], [
  82                                 LIST_ALL_PKG="rpm -qa"
  83                                 LSPKG="rpm -ql"
  84                         ])
  85
  86                         O2IBPKG="mlnx-ofed-kernel-dkms"
  87                         O2IBPKG+="|mlnx-ofed-kernel-modules"
  88                         O2IBPKG+="|mlnx-ofa_kernel-devel"
  89                         O2IBPKG+="|compat-rdma-devel"
  90                         O2IBPKG+="|kernel-ib-devel"
  91                         O2IBPKG+="|ofa_kernel-devel"
  92
  93                         O2IBDIR="/ofa_kernel"
  94                         O2IBDIR+="|/ofa_kernel/default"
  95                         O2IBDIR+="|/openib"
  96
  97                         O2IBDIR_PATH=$(eval $LIST_ALL_PKG |
  98                                        egrep -w "$O2IBPKG" | xargs $LSPKG |
  99                                        egrep "${O2IBDIR}$" | head -n1)
 100
 101                         if test -n "$O2IBDIR_PATH"; then
 102                                 EXT_O2IBPATHS=$(find $O2IBDIR_PATH -name rdma_cm.h |
 103                                         grep -F -e "$(uname -r)" -e default |
 104                                         sed -e 's/\/include\/rdma\/rdma_cm.h//')
 105                         fi
 106
 107                         # When ofed-scripts are installed and either the devel
 108                         # package is missing or multiple devel packages are
 109                         # installed. Give the user a warning
 110                         # The in-kernel ofed stack can be built .. so we can
 111                         # proceed.
 112
 113                         EXTERNAL_KO2IBLND="yes"
 114                         AS_IF([test -z "$EXT_O2IBPATHS"], [
 115                                 EXTERNAL_KO2IBLND="no"
 116                                 AC_MSG_WARN([
 117 * You seem to have an OFED installed but have not installed the associated
 118 * devel package.
 119 * If you still want to build Lustre for your External OFED I/B stack,
 120 * you need to install its devel headers RPM.
 121 * Only the kernel built-in I/B stack support will be built.
 122                                              ])
 123                         ])
 124                         AS_IF([test $(echo $EXT_O2IBPATHS | wc -w) -ge 2], [
 125                                 BUILT_IN_KO2IBLND="no"
 126                                 AC_MSG_WARN([
 127 * It appears that you have multiple OFED versions installed.
 128 * If you still want to build Lustre for your External OFED I/B stack, you
 129 * need to install a single version with the associated devel package.
 130 * Only the kernel built-in I/B stack support will be built.
 131                                      ])
 132                         ])
 133                         if test x$EXTERNAL_KO2IBLND != "xno" ; then
 134                                 if test -e $EXT_O2IBPATHS/${LINUXRELEASE}; then
 135                                     EXT_O2IBPATHS=$EXT_O2IBPATHS/${LINUXRELEASE}
 136                                 elif test -e $EXT_O2IBPATHS/default; then
 137                                     EXT_O2IBPATHS=$EXT_O2IBPATHS/default
 138                                 fi
 139                         fi
 140                 ])
 141                 ENABLEO2IB="yes"
 142                 ;;
 143         no)     ENABLEO2IB="no"
 144                 EXTERNAL_KO2IBLND="no"
 145                 BUILT_IN_KO2IBLND="no"
 146                 ;;
 147         *)      ENABLEO2IB="withpath"
 148                 EXT_O2IBPATHS=$with_o2ib
 149                 EXTERNAL_KO2IBLND="yes"
 150                 INT_O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
 151                 BUILT_IN_KO2IBLND="yes"
 152                 ;;
 153 esac
 154
 155 AS_IF([test $ENABLEO2IB = "no"], [
 156         AC_MSG_RESULT([no])
 157         AC_DEFUN([LN_CONFIG_O2IB_SRC], [])
 158         AC_DEFUN([LN_CONFIG_O2IB_RESULTS], [])
 159         EXT_O2IB_SYMBOLS=""
 160         INT_O2IB_SYMBOLS=""
 161 ], [
 162         # Verify in-kernel O2IB can be built (headers exist) ... or disable it.
 163         int_o2ib_found=false
 164         for INT_O2IBPATH in $INT_O2IBPATHS; do
 165                 AS_IF([test \( -f ${INT_O2IBPATH}/include/rdma/rdma_cm.h -a \
 166                            -f ${INT_O2IBPATH}/include/rdma/ib_cm.h -a \
 167                            -f ${INT_O2IBPATH}/include/rdma/ib_verbs.h \)], [
 168                         int_o2ib_found=true
 169                         break
 170                 ])
 171         done
 172         if ! $int_o2ib_found; then
 173                 AC_MSG_WARN([kernel does not support in-kernel o2ib, it will not be built])
 174                 BUILT_IN_KO2IBLND="no"
 175         fi
 176
 177         # Verify external O2IB can be built (headers exist), or abort
 178         ext_o2ib_found=false
 179         for EXT_O2IBPATH in $EXT_O2IBPATHS; do
 180                 AS_IF([test \( -f ${EXT_O2IBPATH}/include/rdma/rdma_cm.h -a \
 181                            -f ${EXT_O2IBPATH}/include/rdma/ib_cm.h -a \
 182                            -f ${EXT_O2IBPATH}/include/rdma/ib_verbs.h \)], [
 183                         ext_o2ib_found=true
 184                         break
 185                 ])
 186         done
 187         if ! $ext_o2ib_found; then
 188                 case $EXT_ENABLEO2IB in
 189                         "withpath") AC_MSG_ERROR([bad --with-o2ib path]) ;;
 190                         *)      AC_MSG_WARN([
 191 Auto detection of external O2IB failed. Build of external o2ib disabled.])
 192                                 EXTERNAL_KO2IBLND="no"
 193                                 ;;
 194                 esac
 195         fi
 196
 197         if test "x$EXTERNAL_KO2IBLND" != no ; then
 198                 # Additional checks for external O2IB
 199                 COMPAT_AUTOCONF=""
 200                 compatrdma_found=false
 201                 if test -f ${EXT_O2IBPATH}/include/linux/compat-2.6.h; then
 202                         AC_MSG_RESULT([yes])
 203                         compatrdma_found=true
 204                         AC_DEFINE(HAVE_OFED_COMPAT_RDMA, 1, [compat rdma found])
 205                         EXTRA_OFED_CONFIG="$EXTRA_OFED_CONFIG -include ${EXT_O2IBPATH}/include/linux/compat-2.6.h"
 206                         if test -f "$EXT_O2IBPATH/include/linux/compat_autoconf.h"; then
 207                                 COMPAT_AUTOCONF="$EXT_O2IBPATH/include/linux/compat_autoconf.h"
 208                         fi
 209                 else
 210                         AC_MSG_RESULT([no])
 211                 fi
 212                 if ! $compatrdma_found; then
 213                         if test -f "$EXT_O2IBPATH/config.mk"; then
 214                                 . "$EXT_O2IBPATH/config.mk"
 215                         elif test -f "$EXT_O2IBPATH/ofed_patch.mk"; then
 216                                 . "$EXT_O2IBPATH/ofed_patch.mk"
 217                         fi
 218                 elif test -z "$COMPAT_AUTOCONF"; then
 219                         # Depreciated checks
 220                         if test "x$RHEL_KERNEL" = xyes; then
 221                                 RHEL_MAJOR=$(awk '/ RHEL_MAJOR / { print [$]3 }' $LINUX_OBJ/include/$VERSION_HDIR/version.h)
 222                                 I=$(awk '/ RHEL_MINOR / { print [$]3 }' $LINUX_OBJ/include/$VERSION_HDIR/version.h)
 223                                 while test "$I" -ge 0; do
 224                                         EXTRA_OFED_INCLUDE="$EXTRA_OFED_INCLUDE -DCONFIG_COMPAT_RHEL_${RHEL_MAJOR}_$I"
 225                                         I=$(($I-1))
 226                                 done
 227                         elif test "x$SUSE_KERNEL" = xyes; then
 228                                 SP=$(grep PATCHLEVEL /etc/SuSE-release | sed -e 's/.*= *//')
 229                                 EXTRA_OFED_INCLUDE="$EXTRA_OFED_INCLUDE -DCONFIG_COMPAT_SLES_11_$SP"
 230                         fi
 231                 fi
 232
 233                 AC_MSG_CHECKING([whether to use any OFED backport headers])
 234                 if test -n "$BACKPORT_INCLUDES"; then
 235                         AC_MSG_RESULT([yes])
 236                         OFED_BACKPORT_PATH="$EXT_O2IBPATH/${BACKPORT_INCLUDES/*\/kernel_addons/kernel_addons}/"
 237                         EXTRA_OFED_INCLUDE="-I$OFED_BACKPORT_PATH $EXTRA_OFED_INCLUDE"
 238                 else
 239                         AC_MSG_RESULT([no])
 240                 fi
 241
 242                 EXT_O2IBLND=""
 243                 EXT_O2IBPATH=$(readlink --canonicalize $EXT_O2IBPATH)
 244                 EXTRA_OFED_INCLUDE="$EXTRA_OFED_INCLUDE -I$EXT_O2IBPATH/include"
 245                 EXTRA_OFED_INCLUDE="$EXTRA_OFED_INCLUDE -I$EXT_O2IBPATH/include/uapi"
 246                 EXTRA_CHECK_INCLUDE="$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE"
 247                 LB_CHECK_COMPILE([whether to enable OpenIB gen2 support],
 248                 openib_gen2_support, [
 249                         #ifdef HAVE_OFED_COMPAT_RDMA
 250                         #undef PACKAGE_NAME
 251                         #undef PACKAGE_TARNAME
 252                         #undef PACKAGE_VERSION
 253                         #undef PACKAGE_STRING
 254                         #undef PACKAGE_BUGREPORT
 255                         #undef PACKAGE_URL
 256                         #include <linux/compat-2.6.h>
 257                         #endif
 258                         #include <linux/version.h>
 259                         #include <linux/pci.h>
 260                         #include <linux/gfp.h>
 261                         #include <rdma/rdma_cm.h>
 262                         #include <rdma/ib_cm.h>
 263                         #include <rdma/ib_verbs.h>
 264                 ],[
 265                         struct rdma_cm_id *cm_idi __attribute__ ((unused));
 266                         struct rdma_conn_param conn_param __attribute__ ((unused));
 267                         struct ib_device_attr device_attr __attribute__ ((unused));
 268                         struct ib_qp_attr qp_attr __attribute__ ((unused));
 269                         enum ib_cm_rej_reason rej_reason __attribute__ ((unused));
 270
 271                         rdma_destroy_id(NULL);
 272                 ],[
 273                         EXT_O2IBLND="o2iblnd"
 274                 ],[
 275                         case $ENABLEO2IB in
 276                         "yes") AC_MSG_ERROR([cannot compile with OpenIB gen2 headers]) ;;
 277                         "withpath") AC_MSG_ERROR([cannot compile with OpenIB gen2 headers under $EXT_O2IBPATH]) ;;
 278                         *) AC_MSG_ERROR([internal error]) ;;
 279                         esac
 280                 ])
 281                 # we know that the found external OFED source+headers are good
 282                 EXT_O2IB_SYMBOLS=""
 283                 CHECK_SYMBOLS=""
 284                 if test -f $EXT_O2IBPATH/Module.symvers ; then
 285                         CHECK_SYMBOLS=$EXT_O2IBPATH/Module.symvers
 286                 fi
 287                 if test -n "$CHECK_SYMBOLS"; then
 288                         if test ! "$CHECK_SYMBOLS" -ef "$LINUX_OBJ/Module.symvers"; then
 289                                 AC_MSG_NOTICE([adding $CHECK_SYMBOLS to external o2ib symbols])
 290                                 EXT_O2IB_SYMBOLS="${CHECK_SYMBOLS}"
 291                         else
 292                                 EXTERNAL_KO2IBLND="no"
 293                         fi
 294                 elif test "x$EXTERNAL_KO2IBLND" != "xno" ; then
 295                         AC_MSG_WARN([
 296         * Module.symvers for external o2iblnd was not found.
 297         * Expected: $EXT_O2IBPATH/Module.symvers
 298         * ko2iblnd.ko for external OFED will not be built.
 299                                     ])
 300                         EXTERNAL_KO2IBLND="no"
 301                 fi
 302         fi
 303
 304         # we suspect that the found in-kernel OFED source+headers are good
 305         # the above compile test *could* be repeated with in-kernel paths ...
 306         INT_O2IB_SYMBOLS=""
 307         CHECK_SYMBOLS=""
 308         if test -f $INT_O2IBPATH/Module.symvers; then
 309                 CHECK_SYMBOLS=$INT_O2IBPATH/Module.symvers
 310         elif test "x$SUSE_KERNEL" = "xyes"; then
 311                 CHECK_SYMBOLS=$(find ${INT_O2IBPATH}* -name Module.symvers)
 312                 # Select only the current 'flavor' if there is more than 1
 313                 NUM_AVAIL=$(find ${INT_O2IBPATH}* -name Module.symvers | wc -l)
 314                 if test ${NUM_AVAIL} -gt 1; then
 315                         PREFER=$(basename ${LINUX_OBJ})
 316                         for F in $(find ${O2IBPATH}-obj -name Module.symvers)
 317                         do
 318                                 maybe=$(echo $F | grep "/${PREFER}")
 319                                 if test "x$maybe" != "x"; then
 320                                         CHECK_SYMBOLS=$F
 321                                 fi
 322                         done
 323                 fi
 324         elif test -f $LINUX_OBJ/Module.symvers; then
 325                 # Debian symvers is in the arch tree
 326                 CHECK_SYMBOLS=$LINUX_OBJ/Module.symvers
 327         fi
 328
 329         if test -n "$CHECK_SYMBOLS"; then
 330                 if test ! "$CHECK_SYMBOLS" -ef "$LINUX_OBJ/Module.symvers"; then
 331                         AC_MSG_NOTICE([adding $CHECK_SYMBOLS to o2ib in-kernel symbols])
 332                         INT_O2IB_SYMBOLS="${CHECK_SYMBOLS}"
 333                 fi
 334         else
 335                 AC_MSG_WARN([Module.symvers for in-kernel o2iblnd was not found, in-kernel ofed will not be built])
 336                 BUILT_IN_KO2IBLND="no"
 337         fi
 338
 339         if test "x$EXTERNAL_KO2IBLND" = "xno" -a "x$BUILT_IN_KO2IBLND" = "xno" ; then
 340                 AC_MSG_ERROR([No o2iblnd can be built])
 341         elif test "x$ENABLE_MULTIPLE_LNDS" = "xno" -a \
 342                   "x$EXTERNAL_KO2IBLND" != "xno" -a "x$BUILT_IN_KO2IBLND" != "xno"; then
 343                 AC_MSG_WARN([
 344 NOTE: --enable-multiple-lnds is needed to enable both o2iblnd drivers.
 345 * Disabling in-kernel o2iblnd in favor of external o2iblnd driver.
 346 * There can be only one in this configuration
 347                             ])
 348                 BUILT_IN_KO2IBLND="no"
 349         fi
 350
 351         LB_CHECK_COMPILE([if Linux kernel has kthread_worker],
 352         linux_kthread_worker, [
 353                 #ifdef HAVE_OFED_COMPAT_RDMA
 354                 #undef PACKAGE_NAME
 355                 #undef PACKAGE_TARNAME
 356                 #undef PACKAGE_VERSION
 357                 #undef PACKAGE_STRING
 358                 #undef PACKAGE_BUGREPORT
 359                 #undef PACKAGE_URL
 360                 #include <linux/compat-2.6.h>
 361                 #endif
 362                 #include <linux/kthread.h>
 363         ],[
 364                 struct kthread_work *kth_wrk = NULL;
 365                 flush_kthread_work(kth_wrk);
 366         ],[
 367                 AC_DEFINE(HAVE_KTHREAD_WORK, 1, [kthread_worker found])
 368                 if test -z "$COMPAT_AUTOCONF"; then
 369                         EXTRA_OFED_INCLUDE="$EXTRA_OFED_INCLUDE -DCONFIG_COMPAT_IS_KTHREAD"
 370                 fi
 371         ])
 372         EXTRA_CHECK_INCLUDE=""
 373 ])
 374 AC_SUBST(EXTRA_OFED_CONFIG)
 375 AC_SUBST(EXTRA_OFED_INCLUDE)
 376 AC_SUBST(EXT_O2IBLND)
 377 AC_SUBST(EXT_O2IB_SYMBOLS)
 378 AC_SUBST(INT_O2IB_SYMBOLS)
 379
 380 # Passed down to deb packaging via autoMakefile.am
 381 AC_SUBST(EXT_O2IBPATH)
 382 AC_SUBST(ENABLEO2IB)
 383 AC_SUBST(ENABLE_MULTIPLE_LNDS)
 384
 385 AS_IF([test $ENABLEO2IB != "no"], [
 386         EXTRA_CHECK_INCLUDE="$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE"
 387         if test ! $EXT_O2IBPATH -ef $LINUX_OBJ; then
 388                 EXTERNAL_KO2IBLND="yes"
 389         fi
 390
 391         # In RHEL 6.2, rdma_create_id() takes the queue-pair type as a fourth argument
 392         AC_DEFUN([LN_SRC_O2IB_RDMA_CREATE_ID_4A], [
 393                 LB2_OFED_TEST_SRC([rdma_create_id_4args], [
 394                         #ifdef HAVE_OFED_COMPAT_RDMA
 395                         #undef PACKAGE_NAME
 396                         #undef PACKAGE_TARNAME
 397                         #undef PACKAGE_VERSION
 398                         #undef PACKAGE_STRING
 399                         #undef PACKAGE_BUGREPORT
 400                         #undef PACKAGE_URL
 401                         #include <linux/compat-2.6.h>
 402                         #endif
 403                         #include <rdma/rdma_cm.h>
 404                 ],[
 405                         rdma_create_id(NULL, NULL, 0, 0);
 406                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 407         ])
 408         AC_DEFUN([LN_O2IB_RDMA_CREATE_ID_4A], [
 409                 LB2_OFED_TEST_RESULTS(
 410                         ['rdma_create_id' wants four args],
 411                         [rdma_create_id_4args],
 412                         [HAVE_OFED_RDMA_CREATE_ID_4ARG])
 413         ])
 414
 415         # 4.4 added network namespace parameter for rdma_create_id()
 416         AC_DEFUN([LN_SRC_O2IB_RDMA_CREATE_ID_5A], [
 417                 LB2_OFED_TEST_SRC([rdma_create_id_5args], [
 418                         #ifdef HAVE_OFED_COMPAT_RDMA
 419                         #undef PACKAGE_NAME
 420                         #undef PACKAGE_TARNAME
 421                         #undef PACKAGE_VERSION
 422                         #undef PACKAGE_STRING
 423                         #undef PACKAGE_BUGREPORT
 424                         #undef PACKAGE_URL
 425                         #include <linux/compat-2.6.h>
 426                         #endif
 427                         #include <rdma/rdma_cm.h>
 428                 ],[
 429                         rdma_create_id(NULL, NULL, NULL, 0, 0);
 430                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 431         ])
 432         AC_DEFUN([LN_O2IB_RDMA_CREATE_ID_5A], [
 433                 LB2_OFED_TEST_RESULTS(
 434                         ['rdma_create_id' wants five args],
 435                         [rdma_create_id_5args],
 436                         [HAVE_OFED_RDMA_CREATE_ID_5ARG])
 437         ])
 438
 439         # 4.2 introduced struct ib_cq_init_attr which is used
 440         # by ib_create_cq(). Note some OFED stacks only keep
 441         # their headers in sync with latest kernels but not
 442         # the functionality which means for infiniband testing
 443         # we need to always test functionality testings.
 444         AC_DEFUN([LN_SRC_O2IB_IB_CQ_INIT_ATTR], [
 445                 LB2_OFED_TEST_SRC([ib_cq_init_attr], [
 446                         #ifdef HAVE_OFED_COMPAT_RDMA
 447                         #undef PACKAGE_NAME
 448                         #undef PACKAGE_TARNAME
 449                         #undef PACKAGE_VERSION
 450                         #undef PACKAGE_STRING
 451                         #undef PACKAGE_BUGREPORT
 452                         #undef PACKAGE_URL
 453                         #include <linux/compat-2.6.h>
 454                         #endif
 455                         #include <rdma/ib_verbs.h>
 456                 ],[
 457                         struct ib_cq_init_attr cq_attr;
 458
 459                         ib_create_cq(NULL, NULL, NULL, NULL, &cq_attr);
 460                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 461         ])
 462         AC_DEFUN([LN_O2IB_IB_CQ_INIT_ATTR], [
 463                 LB2_OFED_TEST_RESULTS(
 464                         ['struct ib_cq_init_attr' is used by ib_create_cq],
 465                         [ib_cq_init_attr],
 466                         [HAVE_OFED_IB_CQ_INIT_ATTR])
 467         ])
 468
 469         # 4.3 removed ib_alloc_fast_reg_mr()
 470         AC_DEFUN([LN_SRC_O2IB_IB_ALLOC_FAST_REG_MR], [
 471                 LB2_OFED_TEST_SRC([ib_alloc_fast_reg_mr], [
 472                         #ifdef HAVE_OFED_COMPAT_RDMA
 473                         #undef PACKAGE_NAME
 474                         #undef PACKAGE_TARNAME
 475                         #undef PACKAGE_VERSION
 476                         #undef PACKAGE_STRING
 477                         #undef PACKAGE_BUGREPORT
 478                         #undef PACKAGE_URL
 479                         #include <linux/compat-2.6.h>
 480                         #endif
 481                         #include <rdma/ib_verbs.h>
 482                 ],[
 483                         ib_alloc_fast_reg_mr(NULL, 0);
 484                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 485         ])
 486         AC_DEFUN([LN_O2IB_IB_ALLOC_FAST_REG_MR], [
 487                 LB2_OFED_TEST_RESULTS(
 488                         ['ib_alloc_fast_reg_mr' exists],
 489                         [ib_alloc_fast_reg_mr],
 490                         [HAVE_OFED_IB_ALLOC_FAST_REG_MR])
 491         ])
 492
 493         # 4.9 must stop using ib_get_dma_mr and the global MR
 494         # We then have to use FMR/Fastreg for all RDMA.
 495         AC_DEFUN([LN_SRC_O2IB_IB_GET_DMA_MR], [
 496                 LB2_OFED_TEST_SRC([ib_get_dma_mr], [
 497                         #ifdef HAVE_OFED_COMPAT_RDMA
 498                         #undef PACKAGE_NAME
 499                         #undef PACKAGE_TARNAME
 500                         #undef PACKAGE_VERSION
 501                         #undef PACKAGE_STRING
 502                         #undef PACKAGE_BUGREPORT
 503                         #undef PACKAGE_URL
 504                         #include <linux/compat-2.6.h>
 505                         #endif
 506                         #include <rdma/ib_verbs.h>
 507                 ],[
 508                         ib_get_dma_mr(NULL, 0);
 509                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 510         ])
 511         AC_DEFUN([LN_O2IB_IB_GET_DMA_MR], [
 512                 LB2_OFED_TEST_RESULTS(
 513                         ['ib_get_dma_mr' exists],
 514                         [ib_get_dma_mr],
 515                         [HAVE_OFED_IB_GET_DMA_MR])
 516         ])
 517
 518         # In v4.4 Linux kernel,
 519         # commit e622f2f4ad2142d2a613a57fb85f8cf737935ef5
 520         # split up struct ib_send_wr so that all non-trivial verbs
 521         # use their own structure which embedds struct ib_send_wr.
 522         AC_DEFUN([LN_SRC_O2IB_IB_RDMA_WR], [
 523                 LB2_OFED_TEST_SRC([ib_rdma_wr], [
 524                         #ifdef HAVE_OFED_COMPAT_RDMA
 525                         #undef PACKAGE_NAME
 526                         #undef PACKAGE_TARNAME
 527                         #undef PACKAGE_VERSION
 528                         #undef PACKAGE_STRING
 529                         #undef PACKAGE_BUGREPORT
 530                         #undef PACKAGE_URL
 531                         #include <linux/compat-2.6.h>
 532                         #endif
 533                         #include <rdma/ib_verbs.h>
 534                 ],[
 535                         const struct ib_rdma_wr *wr __attribute__ ((unused));
 536
 537                         wr = rdma_wr(NULL);
 538                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 539         ])
 540         AC_DEFUN([LN_O2IB_IB_RDMA_WR], [
 541                 LB2_OFED_TEST_RESULTS(
 542                         ['struct ib_rdma_wr' is defined],
 543                         [ib_rdma_wr],
 544                         [HAVE_OFED_IB_RDMA_WR])
 545         ])
 546
 547         # new fast registration API introduced in 4.4
 548         AC_DEFUN([LN_SRC_O2IB_IB_MAP_MR_SG_4A], [
 549                 LB2_OFED_TEST_SRC([ib_map_mr_sg_4args], [
 550                         #ifdef HAVE_OFED_COMPAT_RDMA
 551                         #undef PACKAGE_NAME
 552                         #undef PACKAGE_TARNAME
 553                         #undef PACKAGE_VERSION
 554                         #undef PACKAGE_STRING
 555                         #undef PACKAGE_BUGREPORT
 556                         #undef PACKAGE_URL
 557                         #include <linux/compat-2.6.h>
 558                         #endif
 559                         #include <rdma/ib_verbs.h>
 560                 ],[
 561                         ib_map_mr_sg(NULL, NULL, 0, 0);
 562                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 563         ])
 564         # new fast registration API introduced in 4.4
 565         AC_DEFUN([LN_O2IB_IB_MAP_MR_SG_4A], [
 566                 LB2_OFED_TEST_RESULTS(
 567                         ['ib_map_mr_sg' with 4 args exists],
 568                         [ib_map_mr_sg_4args],
 569                         [HAVE_OFED_IB_MAP_MR_SG])
 570         ])
 571
 572         # ib_map_mr_sg changes from 4 to 5 args (adding sg_offset_p)
 573         # in kernel 4.7 (and RHEL 7.3)
 574         AC_DEFUN([LN_SRC_O2IB_IB_MAP_MR_SG_5A], [
 575                 LB2_OFED_TEST_SRC([ib_map_mr_sg_5args], [
 576                         #ifdef HAVE_OFED_COMPAT_RDMA
 577                         #undef PACKAGE_NAME
 578                         #undef PACKAGE_TARNAME
 579                         #undef PACKAGE_VERSION
 580                         #undef PACKAGE_STRING
 581                         #undef PACKAGE_BUGREPORT
 582                         #undef PACKAGE_URL
 583                         #include <linux/compat-2.6.h>
 584                         #endif
 585                         #include <rdma/ib_verbs.h>
 586                 ],[
 587                         ib_map_mr_sg(NULL, NULL, 0, NULL, 0);
 588                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 589         ])
 590         AC_DEFUN([LN_O2IB_IB_MAP_MR_SG_5A], [
 591                 LB2_OFED_TEST_RESULTS(
 592                         [struct ib_reg_wr exists],
 593                         [ib_map_mr_sg_5args],
 594                         [HAVE_OFED_IB_MAP_MR_SG])
 595                 LB2_OFED_TEST_RESULTS(
 596                         ['ib_map_mr_sg()' with 5 args exists],
 597                         [ib_map_mr_sg_5args],
 598                         [HAVE_OFED_IB_MAP_MR_SG_5ARGS])
 599         ])
 600
 601         # ib_query_device() removed in 4.5
 602         AC_DEFUN([LN_SRC_O2IB_IB_DEVICE_ATTRS], [
 603                 LB2_OFED_TEST_SRC([ib_device_attrs], [
 604                         #ifdef HAVE_OFED_COMPAT_RDMA
 605                         #undef PACKAGE_NAME
 606                         #undef PACKAGE_TARNAME
 607                         #undef PACKAGE_VERSION
 608                         #undef PACKAGE_STRING
 609                         #undef PACKAGE_BUGREPORT
 610                         #undef PACKAGE_URL
 611                         #include <linux/compat-2.6.h>
 612                         #endif
 613                         #include <rdma/ib_verbs.h>
 614                 ],[
 615                         struct ib_device dev;
 616                         struct ib_device_attr dev_attr = {};
 617                         dev.attrs = dev_attr;
 618                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 619         ])
 620         AC_DEFUN([LN_O2IB_IB_DEVICE_ATTRS], [
 621                 LB2_OFED_TEST_RESULTS(
 622                         ['struct ib_device' has member 'attrs'],
 623                         [ib_device_attrs],
 624                         [HAVE_OFED_IB_DEVICE_ATTRS])
 625         ])
 626
 627         # A flags argument was added to ib_alloc_pd() in Linux 4.9,
 628         # commit ed082d36a7b2c27d1cda55fdfb28af18040c4a89
 629         AC_DEFUN([LN_SRC_O2IB_IB_ALLOC_PD], [
 630                 LB2_OFED_TEST_SRC([ib_alloc_pd], [
 631                         #ifdef HAVE_OFED_COMPAT_RDMA
 632                         #undef PACKAGE_NAME
 633                         #undef PACKAGE_TARNAME
 634                         #undef PACKAGE_VERSION
 635                         #undef PACKAGE_STRING
 636                         #undef PACKAGE_BUGREPORT
 637                         #undef PACKAGE_URL
 638                         #include <linux/compat-2.6.h>
 639                         #endif
 640                         #include <rdma/ib_verbs.h>
 641                 ],[
 642                         ib_alloc_pd(NULL, 0);
 643                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 644         ])
 645         AC_DEFUN([LN_O2IB_IB_ALLOC_PD], [
 646                 LB2_OFED_TEST_RESULTS(
 647                         [2arg 'ib_alloc_pd' exists],
 648                         [ib_alloc_pd],
 649                         [HAVE_OFED_IB_ALLOC_PD_2ARGS])
 650         ])
 651
 652         AC_DEFUN([LN_SRC_O2IB_IB_INC_RKEY], [
 653                 LB2_OFED_TEST_SRC([ib_inc_rkey], [
 654                         #ifdef HAVE_OFED_COMPAT_RDMA
 655                         #undef PACKAGE_NAME
 656                         #undef PACKAGE_TARNAME
 657                         #undef PACKAGE_VERSION
 658                         #undef PACKAGE_STRING
 659                         #undef PACKAGE_BUGREPORT
 660                         #undef PACKAGE_URL
 661                         #include <linux/compat-2.6.h>
 662                         #endif
 663                         #include <rdma/ib_verbs.h>
 664                 ],[
 665                         (void)ib_inc_rkey(0);
 666                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 667         ])
 668         AC_DEFUN([LN_O2IB_IB_INC_RKEY], [
 669                 LB2_OFED_TEST_RESULTS(
 670                         [function 'ib_inc_rkey' is defined],
 671                         [ib_inc_rkey],
 672                         [HAVE_OFED_IB_INC_RKEY])
 673         ])
 674
 675         # In MOFED 4.6, the second and third parameters for
 676         # ib_post_send() and ib_post_recv() are declared with
 677         # 'const'.
 678         AC_DEFUN([LN_SRC_O2IB_IB_POST_SEND_CONST], [
 679                 LB2_OFED_TEST_SRC([ib_post_send_recv_const], [
 680                         #ifdef HAVE_OFED_COMPAT_RDMA
 681                         #undef PACKAGE_NAME
 682                         #undef PACKAGE_TARNAME
 683                         #undef PACKAGE_VERSION
 684                         #undef PACKAGE_STRING
 685                         #undef PACKAGE_BUGREPORT
 686                         #undef PACKAGE_URL
 687                         #include <linux/compat-2.6.h>
 688                         #endif
 689                         #include <rdma/ib_verbs.h>
 690                 ],[
 691                         ib_post_send(NULL, (const struct ib_send_wr *)NULL,
 692                                      (const struct ib_send_wr **)NULL);
 693                 ],[-Werror],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 694         ])
 695         AC_DEFUN([LN_O2IB_IB_POST_SEND_CONST], [
 696                 LB2_OFED_TEST_RESULTS(
 697                         ['ib_post_send() and ib_post_recv()' have const parameters],
 698                         [ib_post_send_recv_const],
 699                         [HAVE_OFED_IB_POST_SEND_RECV_CONST])
 700         ])
 701
 702         # MOFED 5.5 fails with:
 703         #   ERROR: "ib_dma_virt_map_sg" [.../ko2iblnd.ko] undefined!
 704         # See if we have a broken ib_dma_map_sg()
 705         AC_DEFUN([LN_SRC_SANE_IB_DMA_MAP_SG], [
 706                 LB2_OFED_TEST_SRC([sane_ib_dma_map_sg], [
 707                         #ifdef HAVE_OFED_COMPAT_RDMA
 708                         #undef PACKAGE_NAME
 709                         #undef PACKAGE_TARNAME
 710                         #undef PACKAGE_VERSION
 711                         #undef PACKAGE_STRING
 712                         #undef PACKAGE_BUGREPORT
 713                         #undef PACKAGE_URL
 714                         #include <linux/compat-2.6.h>
 715                         #endif
 716                         #include <rdma/ib_verbs.h>
 717                 ],[
 718                         ib_dma_map_sg((struct ib_device *)NULL,
 719                                       (struct scatterlist *)NULL, 1, 0);
 720                 ],[-Werror],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 721         ])
 722         AC_DEFUN([LN_SANE_IB_DMA_MAP_SG], [
 723                 LB2_OFED_TEST_RESULTS(
 724                         [if ib_dma_map_sg() is sane],
 725                         [sane_ib_dma_map_sg],
 726                         [HAVE_OFED_IB_DMA_MAP_SG_SANE],[module])
 727         ])
 728
 729         #
 730         # LN_IB_DEVICE_OPS_EXISTS
 731         #
 732         # kernel 5.0 commit 521ed0d92ab0db3edd17a5f4716b7f698f4fce61
 733         # RDMA/core: Introduce ib_device_ops
 734         # ... introduces the ib_device_ops structure that defines all the
 735         # InfiniBand device operations in one place ...
 736         #
 737         AC_DEFUN([LN_SRC_O2IB_IB_DEVICE_OPS_EXISTS], [
 738                 LB2_OFED_TEST_SRC([ib_device_ops_test], [
 739                         #include <rdma/ib_verbs.h>
 740                 ],[
 741                         int x = offsetof(struct ib_device_ops, unmap_fmr);
 742                         x = x;
 743                         (void)x;
 744                 ],[-Werror],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 745         ])
 746         AC_DEFUN([LN_O2IB_IB_DEVICE_OPS_EXISTS], [
 747                 LB2_OFED_TEST_RESULTS(
 748                         [struct ib_device_ops is defined],
 749                         [ib_device_ops_test],
 750                         [HAVE_OFED_IB_DEVICE_OPS])
 751         ]) # LN_IB_DEVICE_OPS_EXISTS
 752
 753         #
 754         # LN_O2IB_IB_SG_DMA_ADDRESS_EXISTS
 755         #
 756         # kernel 5.1 commit a163afc88556e099271a7b423295bc5176fcecce
 757         # IB/core: Remove ib_sg_dma_address() and ib_sg_dma_len()
 758         # ... when dma_ops existed (3.6) ib_sg_dma_address() was not trivial ...
 759         #
 760         AC_DEFUN([LN_SRC_O2IB_IB_SG_DMA_ADDRESS_EXISTS], [
 761                 LB2_OFED_TEST_SRC([ib_sg_dma_address_test], [
 762                         #include <rdma/ib_verbs.h>
 763                 ],[
 764                         u64 x = ib_sg_dma_address(NULL, NULL);
 765                         x = x;
 766                         (void)x;
 767                 ],[-Werror],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 768         ])
 769         AC_DEFUN([LN_O2IB_IB_SG_DMA_ADDRESS_EXISTS], [
 770                 LB2_OFED_TEST_RESULTS(
 771                         [ib_sg_dma_address wrapper exists],
 772                         [ib_sg_dma_address_test],
 773                         [HAVE_OFED_IB_SG_DMA_ADDRESS])
 774         ]) # LN_O2IB_IB_SG_DMA_ADDRESS_EXISTS
 775
 776         #
 777         # LN_O2IB_RDMA_REJECT
 778         #
 779         # A reason argument was added to rdma_reject() in Linux 5.8,
 780         # commit 8094ba0ace7f6cd1e31ea8b151fba3594cadfa9a
 781         AC_DEFUN([LN_SRC_O2IB_RDMA_REJECT], [
 782                 LB2_OFED_TEST_SRC([rdma_reject], [
 783                         #ifdef HAVE_OFED_COMPAT_RDMA
 784                         #undef PACKAGE_NAME
 785                         #undef PACKAGE_TARNAME
 786                         #undef PACKAGE_VERSION
 787                         #undef PACKAGE_STRING
 788                         #undef PACKAGE_BUGREPORT
 789                         #undef PACKAGE_URL
 790                         #include <linux/compat-2.6.h>
 791                         #endif
 792                         #include <rdma/ib_verbs.h>
 793                         #include <rdma/ib_cm.h>
 794                         #include <rdma/rdma_cm.h>
 795                 ],[
 796                         rdma_reject(NULL, NULL, 0, 0);
 797                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 798         ])
 799         AC_DEFUN([LN_O2IB_RDMA_REJECT], [
 800                 LB2_OFED_TEST_RESULTS(
 801                         [4arg 'rdma_reject' exists],
 802                         [rdma_reject],
 803                         [HAVE_OFED_RDMA_REJECT_4ARGS])
 804         ]) # LN_O2IB_RDMA_REJECT
 805
 806         #
 807         # LN_O2IB_IB_FMR
 808         #
 809         # The FMR pool API was removed in Linux 5.8,
 810         # commit 4e373d5417ecbb4f438a8500f0379a2fc29c2643
 811         AC_DEFUN([LN_SRC_O2IB_IB_FMR], [
 812                 LB2_OFED_TEST_SRC([ib_fmr], [
 813                         #include <rdma/ib_verbs.h>
 814                 ],[
 815                         struct ib_fmr fmr = {};
 816                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 817         ])
 818         AC_DEFUN([LN_O2IB_IB_FMR], [
 819                 LB2_OFED_TEST_RESULTS(
 820                         [FMR pools API available],
 821                         [ib_fmr],
 822                         [HAVE_OFED_FMR_POOL_API])
 823         ]) # LN_O2IB_IB_FMR
 824
 825         #
 826         # LN_O2IB_RDMA_CONNECT_LOCKED
 827         #
 828         # rdma_connect_locked() was added in Linux 5.10,
 829         # commit 071ba4cc559de47160761b9500b72e8fa09d923d
 830         # and in MOFED-5.2-2. rdma_connect_locked() must
 831         # be called instead of rdma_connect() in
 832         # RDMA_CM_EVENT_ROUTE_RESOLVED handler.
 833         AC_DEFUN([LN_SRC_O2IB_RDMA_CONNECT_LOCKED], [
 834                 LB2_OFED_TEST_SRC([rdma_connect_locked], [
 835                         #include <rdma/rdma_cm.h>
 836                 ],[
 837                         rdma_connect_locked(NULL, NULL);
 838                 ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
 839         ])
 840         AC_DEFUN([LN_O2IB_RDMA_CONNECT_LOCKED], [
 841                 LB2_OFED_TEST_RESULTS(
 842                         ['rdma_connect_locked' exists],
 843                         [rdma_connect_locked],
 844                         [HAVE_OFED_RDMA_CONNECT_LOCKED])
 845         ]) # LN_O2IB_RDMA_CONNECT_LOCKED
 846
 847         EXTRA_CHECK_INCLUDE=""
 848
 849         AC_DEFUN([LN_CONFIG_O2IB_SRC], [
 850                 LN_SRC_O2IB_RDMA_CREATE_ID_4A
 851                 LN_SRC_O2IB_RDMA_CREATE_ID_5A
 852                 LN_SRC_O2IB_IB_CQ_INIT_ATTR
 853                 LN_SRC_O2IB_IB_ALLOC_FAST_REG_MR
 854                 LN_SRC_O2IB_IB_GET_DMA_MR
 855                 LN_SRC_O2IB_IB_RDMA_WR
 856                 LN_SRC_O2IB_IB_MAP_MR_SG_4A
 857                 LN_SRC_O2IB_IB_MAP_MR_SG_5A
 858                 LN_SRC_O2IB_IB_DEVICE_ATTRS
 859                 LN_SRC_O2IB_IB_ALLOC_PD
 860                 LN_SRC_O2IB_IB_INC_RKEY
 861                 LN_SRC_O2IB_IB_POST_SEND_CONST
 862                 LN_SRC_SANE_IB_DMA_MAP_SG
 863                 LN_SRC_O2IB_IB_DEVICE_OPS_EXISTS
 864                 LN_SRC_O2IB_IB_SG_DMA_ADDRESS_EXISTS
 865                 LN_SRC_O2IB_RDMA_REJECT
 866                 LN_SRC_O2IB_IB_FMR
 867                 LN_SRC_O2IB_RDMA_CONNECT_LOCKED
 868         ])
 869         AC_DEFUN([LN_CONFIG_O2IB_RESULTS], [
 870                 LN_O2IB_RDMA_CREATE_ID_4A
 871                 LN_O2IB_RDMA_CREATE_ID_5A
 872                 LN_O2IB_IB_CQ_INIT_ATTR
 873                 LN_O2IB_IB_ALLOC_FAST_REG_MR
 874                 LN_O2IB_IB_GET_DMA_MR
 875                 LN_O2IB_IB_RDMA_WR
 876                 LN_O2IB_IB_MAP_MR_SG_4A
 877                 LN_O2IB_IB_MAP_MR_SG_5A
 878                 LN_O2IB_IB_DEVICE_ATTRS
 879                 LN_O2IB_IB_ALLOC_PD
 880                 LN_O2IB_IB_INC_RKEY
 881                 LN_O2IB_IB_POST_SEND_CONST
 882                 LN_SANE_IB_DMA_MAP_SG
 883                 LN_O2IB_IB_DEVICE_OPS_EXISTS
 884                 LN_O2IB_IB_SG_DMA_ADDRESS_EXISTS
 885                 LN_O2IB_RDMA_REJECT
 886                 LN_O2IB_IB_FMR
 887                 LN_O2IB_RDMA_CONNECT_LOCKED
 888         ])
 889 ]) # ENABLEO2IB != "no"
 890 ]) # LN_CONFIG_O2IB
 891
 892 #
 893 # LN_CONFIG_GNILND
 894 #
 895 # check whether to use the Gemini Network Interface lnd
 896 #
 897 AC_DEFUN([LN_CONFIG_GNILND], [
 898 AC_MSG_CHECKING([whether to enable GNI lnd])
 899 AC_ARG_ENABLE([gni],
 900         AS_HELP_STRING([--enable-gni],
 901                 [enable GNI lnd]),
 902         [], [enable_gni="no"])
 903 AC_MSG_RESULT([$enable_gni])
 904
 905 AS_IF([test "x$enable_gni" = xyes], [
 906         # GNICPPFLAGS was set in spec file
 907         EXTRA_KCFLAGS_save="$EXTRA_KCFLAGS"
 908         EXTRA_KCFLAGS="$EXTRA_KCFLAGS $GNICPPFLAGS"
 909         LB_CHECK_COMPILE([if GNI kernel headers are present],
 910         GNI_header, [
 911                 #include <linux/types.h>
 912                 #include <gni_pub.h>
 913         ],[
 914                 gni_cdm_handle_t kgni_domain;
 915                 gni_return_t     rc;
 916                 int              rrc;
 917                 rc = gni_cdm_create(0, 1, 1, 0, &kgni_domain);
 918                 rrc = (rc == GNI_RC_SUCCESS) ? 0 : 1;
 919                 return rrc;
 920         ],[
 921                 GNILND="gnilnd"
 922         ],[
 923                 AC_MSG_ERROR([cannot compile gnilnd with given GNICPPFLAGS: $GNICPPFLAGS])
 924         ])
 925         # at this point, we have gnilnd basic support,
 926         # now check for extra features
 927         LB_CHECK_COMPILE([to use RCA in gnilnd],
 928         RCA_gnilnd, [
 929                 #include <linux/types.h>
 930                 #include <gni_pub.h>
 931                 #include <krca_lib.h>
 932         ],[
 933                 gni_cdm_handle_t kgni_domain;
 934                 gni_return_t     rc;
 935                 krca_ticket_t    ticket = KRCA_NULL_TICKET;
 936                 int              rrc;
 937                 __u32            nid = 0, nic_addr;
 938                 rc = gni_cdm_create(0, 1, 1, 0, &kgni_domain);
 939                 rrc = (rc == GNI_RC_SUCCESS) ? 0 : 1;
 940                 rrc += krca_nid_to_nicaddrs(nid, 1, &nic_addr);
 941                 rrc += krca_register(&ticket, RCA_MAKE_SERVICE_INDEX(RCA_IO_CLASS, 9), 99, 0);
 942                 return rrc;
 943         ],[
 944                 GNICPPFLAGS="$GNICPPFLAGS -DGNILND_USE_RCA=1"
 945         ])
 946         EXTRA_KCFLAGS="$EXTRA_KCFLAGS_save"
 947
 948         AC_SUBST(ENABLE_GNI, yes)
 949 ], [
 950         AC_SUBST(ENABLE_GNI, no)
 951 ])
 952 AC_SUBST(GNICPPFLAGS)
 953 AC_SUBST(GNILND)
 954 ]) # LN_CONFIG_GNILND
 955
 956 #
 957 # LN_CONFIG_KFILND
 958 #
 959 # check whether to use the kfabric Network Interface lnd
 960 #
 961 AC_DEFUN([LN_CONFIG_KFILND], [
 962 AC_ARG_WITH([kfi],
 963         AS_HELP_STRING([--with-kfi=<path>], [Kfabric build path for kfilnd]),
 964         [
 965                 AC_CHECK_FILE([$with_kfi/Module.symvers],
 966                 [
 967                         # KFICPPFLAGS was set in spec file
 968                         KFICPPFLAGS="-I$with_kfi/include"
 969                         EXTRA_KCFLAGS_save="$EXTRA_KCFLAGS"
 970                         EXTRA_KCFLAGS="$EXTRA_KCFLAGS $KFICPPFLAGS"
 971                         KBUILD_EXTRA_SYMBOLS="$KBUILD_EXTRA_SYMBOLS $with_kfi/Module.symvers"
 972                         LB_CHECK_COMPILE([if kfabric headers are present], KFI_header,
 973                         [
 974                                 #include <kfi_endpoint.h>
 975                         ],[
 976                                 struct kfi_info *hints;
 977                                 hints = kfi_allocinfo();
 978                         ],[
 979                                 KFILND="kfilnd"
 980                                 AC_MSG_NOTICE([adding $with_kfi/Module.symvers to Symbol Path])
 981                                 EXTRA_SYMBOLS="$EXTRA_SYMBOLS $with_kfi/Module.symvers"
 982                         ],[
 983                                 AC_MSG_ERROR([cannot compile kfilnd with given KFICPPFLAGS: $KFICPPFLAGS])
 984                         ])
 985                 ],[
 986                         AC_MSG_ERROR(["$with_kfi/Module.symvers does not exist"])
 987                 ])
 988         ],[])
 989 AC_DEFINE(HAVE_KFILND, 1, [support kfabric LND])
 990 AC_SUBST(KFICPPFLAGS)
 991 AC_SUBST(KFILND)
 992 AC_SUBST(EXTRA_SYMBOLS)
 993 ]) # LN_CONFIG_KFILND
 994
 995 #
 996 # LN_CONFIG_SOCK_CREATE_KERN
 997 #
 998 # 4.x sock_create_kern() added a first parameter as 'struct net *'
 999 # instead of int.
1000 #
1001 AC_DEFUN([LN_SRC_CONFIG_SOCK_CREATE_KERN], [
1002         LB2_LINUX_TEST_SRC([sock_create_kern_net], [
1003                 #include <linux/net.h>
1004                 #include <net/net_namespace.h>
1005         ],[
1006                 sock_create_kern((struct net*)0, 0, 0, 0, NULL);
1007         ],[-Werror])
1008 ])
1009 AC_DEFUN([LN_CONFIG_SOCK_CREATE_KERN], [
1010         LB2_MSG_LINUX_TEST_RESULT([if 'sock_create_kern' first parameter is net],
1011         [sock_create_kern_net], [
1012                 AC_DEFINE(HAVE_SOCK_CREATE_KERN_USE_NET, 1,
1013                         [sock_create_kern use net as first parameter])
1014         ])
1015 ]) # LN_CONFIG_SOCK_CREATE_KERN
1016
1017 #
1018 # LN_CONFIG_SK_DATA_READY
1019 #
1020 # 3.15 for struct sock the *sk_data_ready() field only takes one argument now
1021 #
1022 AC_DEFUN([LN_SRC_CONFIG_SK_DATA_READY], [
1023         LB2_LINUX_TEST_SRC([sk_data_ready], [
1024                 #include <linux/net.h>
1025                 #include <net/sock.h>
1026         ],[
1027                 ((struct sock *)0)->sk_data_ready(NULL);
1028         ],[-Werror])
1029 ])
1030 AC_DEFUN([LN_CONFIG_SK_DATA_READY], [
1031         LB2_MSG_LINUX_TEST_RESULT([if 'sk_data_ready' takes only one argument],
1032         [sk_data_ready], [
1033         AC_DEFINE(HAVE_SK_DATA_READY_ONE_ARG, 1,
1034                 [sk_data_ready uses only one argument])
1035         ])
1036 ]) # LN_CONFIG_SK_DATA_READY
1037
1038 #
1039 # LN_ETHTOOL_LINK_SETTINGS
1040 #
1041 # ethtool_link_settings was added in Linux 4.6
1042 #
1043 AC_DEFUN([LN_SRC_ETHTOOL_LINK_SETTINGS], [
1044         LB2_LINUX_TEST_SRC([ethtool_link_settings], [
1045                 #include <linux/ethtool.h>
1046         ],[
1047                 struct ethtool_link_ksettings cmd;
1048         ],[],[$EXTRA_OFED_CONFIG $EXTRA_OFED_INCLUDE])
1049 ])
1050 AC_DEFUN([LN_ETHTOOL_LINK_SETTINGS], [
1051         LB2_MSG_LINUX_TEST_RESULT([if 'ethtool_link_settings' exists],
1052         [ethtool_link_settings], [
1053                 AC_DEFINE(HAVE_ETHTOOL_LINK_SETTINGS, 1,
1054                         [ethtool_link_settings is defined])
1055         ])
1056 ]) # LN_ETHTOOL_LINK_SETTINGS
1057
1058 #
1059 # LN_HAVE_HYPERVISOR_IS_TYPE
1060 #
1061 # 4.14 commit 79cc74155218316b9a5d28577c7077b2adba8e58
1062 # x86/paravirt: Provide a way to check for hypervisors
1063 #
1064 AC_DEFUN([LN_SRC_HAVE_HYPERVISOR_IS_TYPE], [
1065         LB2_LINUX_TEST_SRC([hypervisor_is_type_exists], [
1066                 #include <asm/hypervisor.h>
1067         ],[
1068                 (void)hypervisor_is_type(X86_HYPER_NATIVE);
1069         ],[-Werror])
1070 ])
1071 AC_DEFUN([LN_HAVE_HYPERVISOR_IS_TYPE], [
1072         LB2_MSG_LINUX_TEST_RESULT([if hypervisor_is_type function is available],
1073         [hypervisor_is_type_exists], [
1074                 AC_DEFINE(HAVE_HYPERVISOR_IS_TYPE, 1,
1075                         [hypervisor_is_type function exists])
1076         ])
1077 ]) # LN_HAVE_HYPERVISOR_IS_TYPE
1078
1079 #
1080 # LN_HAVE_ORACLE_OFED_EXTENSIONS
1081 #
1082 # Oracle UEK 5
1083 #
1084 AC_DEFUN([LN_SRC_HAVE_ORACLE_OFED_EXTENSIONS], [
1085         LB2_LINUX_TEST_SRC([oracle_ofed_ext], [
1086                 #include <rdma/ib_fmr_pool.h>
1087         ],[
1088                 struct ib_fmr_pool_param param = {
1089                         .relaxed           = 0
1090                 };
1091                 (void)param;
1092         ])
1093 ])
1094 AC_DEFUN([LN_HAVE_ORACLE_OFED_EXTENSIONS], [
1095         LB2_MSG_LINUX_TEST_RESULT([if Oracle OFED Extensions are enabled],
1096         [oracle_ofed_ext], [
1097                 AC_DEFINE(HAVE_ORACLE_OFED_EXTENSIONS, 1,
1098                         [if Oracle OFED Extensions are enabled])
1099         ])
1100 ]) # LN_HAVE_ORACLE_OFED_EXTENSIONS
1101
1102 #
1103 # LN_CONFIG_SOCK_GETNAME
1104 #
1105 # 4.17 commit 9b2c45d479d0fb8647c9e83359df69162b5fbe5f getname()
1106 # does not take the length *int argument and returns the length
1107 #
1108 AC_DEFUN([LN_SRC_CONFIG_SOCK_GETNAME], [
1109         LB2_LINUX_TEST_SRC([kern_sock_getname_2args], [
1110                 #include <linux/net.h>
1111         ],[
1112                 kernel_getsockname(NULL, NULL);
1113         ],[-Werror])
1114 ])
1115 AC_DEFUN([LN_CONFIG_SOCK_GETNAME], [
1116         LB2_MSG_LINUX_TEST_RESULT([if 'getname' has two args],
1117         [kern_sock_getname_2args], [
1118                 AC_DEFINE(HAVE_KERN_SOCK_GETNAME_2ARGS, 1,
1119                         ['getname' has two args])
1120         ])
1121 ]) # LN_CONFIG_SOCK_GETNAME
1122
1123 #
1124 # LN_HAVE_IN_DEV_FOR_EACH_IFA_RTNL
1125 #
1126 # kernel 5.3 commit ef11db3310e272d3d8dbe8739e0770820dd20e52
1127 # and kernel 4.18.0-193.el8:
1128 # added in_dev_for_each_ifa_rtnl and in_dev_for_each_ifa_rcu
1129 # and removed for_ifa and endfor_ifa.
1130 # Use the _rntl variant as the current locking is rtnl.
1131 #
1132 AC_DEFUN([LN_SRC_HAVE_IN_DEV_FOR_EACH_IFA_RTNL], [
1133         LB2_LINUX_TEST_SRC([in_dev_for_each_ifa_rtnl_test], [
1134                 #include <linux/inetdevice.h>
1135         ],[
1136                 const struct in_ifaddr *ifa = NULL;
1137                 struct in_device *in_dev = NULL;
1138
1139                 in_dev_for_each_ifa_rtnl(ifa, in_dev) {}
1140         ],[-Werror])
1141 ])
1142 AC_DEFUN([LN_HAVE_IN_DEV_FOR_EACH_IFA_RTNL], [
1143         LB2_MSG_LINUX_TEST_RESULT([if 'in_dev_for_each_ifa_rtnl' is defined],
1144         [in_dev_for_each_ifa_rtnl_test], [
1145                 AC_DEFINE(HAVE_IN_DEV_FOR_EACH_IFA_RTNL, 1,
1146                         ['in_dev_for_each_ifa_rtnl' is defined])
1147         ])
1148 ]) # LN_HAVE_IN_DEV_FOR_EACH_IFA_RTNL
1149
1150 #
1151 # LN_USR_RDMA
1152 #
1153 #
1154 AC_DEFUN([LN_USR_RDMA], [
1155 AC_MSG_CHECKING([if RDMA_PS_TCP exists])
1156 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
1157         #include <rdma/rdma_user_cm.h>
1158
1159         int main(void) {
1160                 int x = (int)RDMA_PS_TCP;
1161                 return x;
1162         }
1163 ])],[
1164         AC_DEFINE(HAVE_USRSPC_RDMA_PS_TCP, 1,
1165                 [RDMA_PS_TCP exists])
1166 ])
1167 ]) # LN_USR_RDMA
1168
1169 AC_DEFUN([LN_PROG_LINUX_SRC], [
1170         LN_CONFIG_O2IB_SRC
1171         # 3.15
1172         LN_SRC_CONFIG_SK_DATA_READY
1173         # 4.x
1174         LN_SRC_CONFIG_SOCK_CREATE_KERN
1175         # 4.6
1176         LN_SRC_ETHTOOL_LINK_SETTINGS
1177         # 4.14
1178         LN_SRC_HAVE_HYPERVISOR_IS_TYPE
1179         LN_SRC_HAVE_ORACLE_OFED_EXTENSIONS
1180         # 4.17
1181         LN_SRC_CONFIG_SOCK_GETNAME
1182         # 5.3 and 4.18.0-193.el8
1183         LN_SRC_HAVE_IN_DEV_FOR_EACH_IFA_RTNL
1184 ])
1185
1186 AC_DEFUN([LN_PROG_LINUX_RESULTS], [
1187         LN_CONFIG_O2IB_RESULTS
1188         # 3.15
1189         LN_CONFIG_SK_DATA_READY
1190         # 4.x
1191         LN_CONFIG_SOCK_CREATE_KERN
1192         # 4.6
1193         LN_ETHTOOL_LINK_SETTINGS
1194         # 4.14
1195         LN_HAVE_HYPERVISOR_IS_TYPE
1196         LN_HAVE_ORACLE_OFED_EXTENSIONS
1197         # 4.17
1198         LN_CONFIG_SOCK_GETNAME
1199         # 5.3 and 4.18.0-193.el8
1200         LN_HAVE_IN_DEV_FOR_EACH_IFA_RTNL
1201 ])
1202
1203 #
1204 # LN_PROG_LINUX
1205 #
1206 # LNet linux kernel checks
1207 #
1208 AC_DEFUN([LN_PROG_LINUX], [
1209 AC_MSG_NOTICE([LNet kernel checks
1210 ==============================================================================])
1211
1212 LN_CONFIG_BACKOFF
1213 LN_CONFIG_O2IB
1214 LN_CONFIG_GNILND
1215 LN_CONFIG_KFILND
1216 ]) # LN_PROG_LINUX
1217
1218 #
1219 # LN_PATH_DEFAULTS
1220 #
1221 # default paths for installed files
1222 #
1223 AC_DEFUN([LN_PATH_DEFAULTS], [
1224 ]) # LN_PATH_DEFAULTS
1225
1226 #
1227 # LN_CONFIGURE
1228 #
1229 # other configure checks
1230 #
1231 AC_DEFUN([LN_CONFIGURE], [
1232 AC_MSG_NOTICE([LNet core checks
1233 ==============================================================================])
1234
1235 AC_ARG_WITH([cuda],
1236         AS_HELP_STRING([--with-cuda=path],
1237                         [Path to the CUDA sources. Set to 'no' to disable.]),
1238                         [cudapath="$withval"],
1239                         [cudapath1=`ls -d1 /usr/src/nvidia-*/nvidia/ 2>/dev/null | tail -1`])
1240
1241 AC_ARG_WITH([gds],
1242         AS_HELP_STRING([--with-gds=path],
1243                         [Path to the GDS sources. Set to 'no' to disable.]),
1244                         [gdspath="$withval"],
1245                         [gdspath1=`ls -d1 /usr/src/nvidia-fs*/ 2>/dev/null | tail -1`])
1246
1247 AC_MSG_CHECKING([cuda source directory])
1248         AS_IF([test -z "${cudapath}"], [
1249                 AS_IF([test -e "${cudapath1}/nv-p2p.h"], [
1250                         cudapath=${cudapath1}
1251                 ], [
1252                         cudapath="[Not found]"
1253                 ])
1254         ])
1255 AC_MSG_RESULT([$cudapath])
1256
1257 AC_MSG_CHECKING([gds source directory])
1258         AS_IF([test -z "${gdspath}"], [
1259                 AS_IF([test -e "${gdspath1}/nvfs-dma.h"], [
1260                         gdspath=${gdspath1}
1261                 ], [
1262                         gdspath="[Not found]"
1263                 ])
1264         ])
1265 AC_MSG_RESULT([$gdspath])
1266
1267 AS_IF([test -e "${cudapath}" && test -e "${gdspath}"],[
1268         LB_CHECK_FILE([$cudapath/nv-p2p.h], [
1269                 AC_MSG_RESULT([CUDA path is $cudapath])
1270                 [CUDA_PATH=${cudapath}]
1271                 AC_SUBST(CUDA_PATH)
1272         ],[
1273                 AC_MSG_RESULT([CUDA sources not found: nv-p2p.h does not exist])
1274         ])
1275
1276         LB_CHECK_FILE([$gdspath/nvfs-dma.h], [
1277                 LB_CHECK_FILE([$gdspath/config-host.h], [
1278                         AC_MSG_RESULT([GDS path is ${gdspath}])
1279                         [GDS_PATH=${gdspath}]
1280                         AC_SUBST(GDS_PATH)
1281                         AC_DEFINE(WITH_GDS, 1, "GDS build enabled")
1282                 ], [
1283                     AC_MSG_RESULT([GDS sources not found: config-host.h does not exist])
1284         ])
1285         ], [
1286                 AC_MSG_RESULT([GDS sources not found: nvfs-dma.h does not exist])
1287     ])
1288 ],[
1289         AC_MSG_WARN([CUDA or GDS sources not found. GDS support disabled])
1290 ])
1291
1292 # lnet/utils/lnetconfig/liblnetconfig_netlink.c
1293 AS_IF([test "x$PKGCONF" = "x"],
1294         [AC_MSG_ERROR([pkg-config package is required to configure Lustre])])
1295
1296 AS_IF([test "x$enable_dist" = xno], [
1297         PKG_CHECK_MODULES(LIBNL3, [libnl-genl-3.0 >= 3.1])
1298 ])
1299
1300 AC_CHECK_LIB([nl-3], [nla_get_s32], [
1301         AC_DEFINE(HAVE_NLA_GET_S32, 1,
1302                 [libnl3 supports nla_get_s32])
1303         ], [
1304 ])
1305
1306 AC_CHECK_LIB([nl-3], [nla_get_s64], [
1307         AC_DEFINE(HAVE_NLA_GET_S64, 1,
1308                 [libnl3 supports nla_get_s64])
1309         ], [
1310 ])
1311
1312 #
1313 # LN_USR_NLMSGERR
1314 #
1315 AC_DEFUN([LN_USR_NLMSGERR], [
1316 AC_MSG_CHECKING([if 'enum nlmsgerr_attrs' exists])
1317 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
1318         #include <linux/netlink.h>
1319
1320         int main(void) {
1321                 int x = (int)NLMSGERR_ATTR_MAX;
1322                 return x;
1323         }
1324 ])],[
1325         AC_DEFINE(HAVE_USRSPC_NLMSGERR, 1,
1326                 ['enum nlmsgerr_attrs' exists])
1327 ])
1328 ]) # LN_USR_NLMGSERR
1329
1330 # lnet/utils/portals.c
1331 AC_CHECK_HEADERS([netdb.h])
1332
1333 # lnet/utils/wirecheck.c
1334 AC_CHECK_FUNCS([strnlen])
1335
1336 # --------  Check for required packages  --------------
1337
1338 AC_MSG_CHECKING([whether to enable 'efence' debugging support])
1339 AC_ARG_ENABLE(efence,
1340         AS_HELP_STRING([--enable-efence],
1341                 [use efence library]),
1342         [], [enable_efence="no"])
1343 AC_MSG_RESULT([$enable_efence])
1344
1345 LIBEFENCE=""
1346 AS_IF([test "$enable_efence" = yes], [
1347         LIBEFENCE="-lefence"
1348         AC_DEFINE(HAVE_LIBEFENCE, 1,
1349                 [libefence support is requested])
1350         AC_SUBST(ENABLE_EFENCE, yes)
1351 ], [
1352         AC_SUBST(ENABLE_EFENCE, no)
1353 ])
1354 AC_SUBST(LIBEFENCE)
1355
1356 LN_CONFIG_DLC
1357 LN_USR_RDMA
1358 LN_USR_NLMSGERR
1359 ]) # LN_CONFIGURE
1360
1361 #
1362 # LN_CONDITIONALS
1363 #
1364 # AM_CONDITIONAL defines for lnet
1365 #
1366 AC_DEFUN([LN_CONDITIONALS], [
1367 AM_CONDITIONAL(EXTERNAL_KO2IBLND,  test x$EXTERNAL_KO2IBLND = "xyes")
1368 AM_CONDITIONAL(BUILT_IN_KO2IBLND,  test x$BUILT_IN_KO2IBLND = "xyes")
1369 AM_CONDITIONAL(BUILD_GNILND,       test x$GNILND  = "xgnilnd")
1370 AM_CONDITIONAL(BUILD_KFILND,       test x$KFILND  = "xkfilnd")
1371 ]) # LN_CONDITIONALS
1372
1373 #
1374 # LN_CONFIG_FILES
1375 #
1376 # files that should be generated with AC_OUTPUT
1377 #
1378 AC_DEFUN([LN_CONFIG_FILES], [
1379 AC_CONFIG_FILES([
1380 lnet/Makefile
1381 lnet/autoMakefile
1382 lnet/autoconf/Makefile
1383 lnet/doc/Makefile
1384 lnet/include/Makefile
1385 lnet/include/lnet/Makefile
1386 lnet/include/uapi/linux/lnet/Makefile
1387 lnet/klnds/Makefile
1388 lnet/klnds/autoMakefile
1389 lnet/klnds/o2iblnd/Makefile
1390 lnet/klnds/o2iblnd/autoMakefile
1391 lnet/klnds/in-kernel-o2iblnd/Makefile
1392 lnet/klnds/in-kernel-o2iblnd/autoMakefile
1393 lnet/klnds/gnilnd/Makefile
1394 lnet/klnds/gnilnd/autoMakefile
1395 lnet/klnds/socklnd/Makefile
1396 lnet/klnds/socklnd/autoMakefile
1397 lnet/klnds/kfilnd/Makefile
1398 lnet/klnds/kfilnd/autoMakefile
1399 lnet/lnet/Makefile
1400 lnet/lnet/autoMakefile
1401 lnet/selftest/Makefile
1402 lnet/selftest/autoMakefile
1403 lnet/utils/Makefile
1404 lnet/utils/lnetconfig/Makefile
1405 ])
1406 ]) # LN_CONFIG_FILES