libcfs/autoconf/lustre-libcfs.m4

   1 #
   2 # LIBCFS_CONFIG_CDEBUG
   3 #
   4 # whether to enable various libcfs debugs (CDEBUG, ENTRY/EXIT, LASSERT, etc.)
   5 #
   6 AC_DEFUN([LIBCFS_CONFIG_CDEBUG], [
   7 AC_MSG_CHECKING([whether to enable CDEBUG, CWARN])
   8 AC_ARG_ENABLE([libcfs_cdebug],
   9         AS_HELP_STRING([--disable-libcfs-cdebug],
  10                 [disable libcfs CDEBUG, CWARN]),
  11         [], [enable_libcfs_cdebug="yes"])
  12 AC_MSG_RESULT([$enable_libcfs_cdebug])
  13 AS_IF([test "x$enable_libcfs_cdebug" = xyes], [
  14         AC_DEFINE(CDEBUG_ENABLED, 1, [enable libcfs CDEBUG, CWARN])
  15         AC_SUBST(ENABLE_LIBCFS_CDEBUG, yes)
  16 ], [
  17         AC_SUBST(ENABLE_LIBCFS_CDEBUG, no)
  18 ])
  19
  20 AC_MSG_CHECKING([whether to enable ENTRY/EXIT])
  21 AC_ARG_ENABLE([libcfs_trace],
  22         AS_HELP_STRING([--disable-libcfs-trace],
  23                 [disable libcfs ENTRY/EXIT]),
  24         [], [enable_libcfs_trace="yes"])
  25 AC_MSG_RESULT([$enable_libcfs_trace])
  26 AS_IF([test "x$enable_libcfs_trace" = xyes], [
  27         AC_DEFINE(CDEBUG_ENTRY_EXIT, 1, [enable libcfs ENTRY/EXIT])
  28         AC_SUBST(ENABLE_LIBCFS_TRACE, yes)
  29 ], [
  30         AC_SUBST(ENABLE_LIBCFS_TRACE, no)
  31 ])
  32
  33 AC_MSG_CHECKING([whether to enable LASSERT, LASSERTF])
  34 AC_ARG_ENABLE([libcfs_assert],
  35         AS_HELP_STRING([--disable-libcfs-assert],
  36                 [disable libcfs LASSERT, LASSERTF]),
  37         [], [enable_libcfs_assert="yes"])
  38 AC_MSG_RESULT([$enable_libcfs_assert])
  39 AS_IF([test x$enable_libcfs_assert = xyes], [
  40         AC_DEFINE(LIBCFS_DEBUG, 1, [enable libcfs LASSERT, LASSERTF])
  41         AC_SUBST(ENABLE_LIBCFS_ASSERT, yes)
  42 ], [
  43         AC_SUBST(ENABLE_LIBCFS_ASSERT, no)
  44 ])
  45 ]) # LIBCFS_CONFIG_CDEBUG
  46
  47 #
  48 # LIBCFS_CONFIG_PANIC_DUMPLOG
  49 #
  50 # check if tunable panic_dumplog is wanted
  51 #
  52 AC_DEFUN([LIBCFS_CONFIG_PANIC_DUMPLOG], [
  53 AC_MSG_CHECKING([whether to use tunable 'panic_dumplog' support])
  54 AC_ARG_ENABLE([panic_dumplog],
  55         AS_HELP_STRING([--enable-panic_dumplog],
  56                 [enable panic_dumplog]),
  57         [], [enable_panic_dumplog="no"])
  58 AC_MSG_RESULT([$enable_panic_dumplog])
  59 AS_IF([test "x$enable_panic_dumplog" = xyes], [
  60         AC_DEFINE(LNET_DUMP_ON_PANIC, 1, [use dumplog on panic])
  61         AC_SUBST(ENABLE_PANIC_DUMPLOG, yes)
  62 ], [
  63         AC_SUBST(ENABLE_PANIC_DUMPLOG, no)
  64 ])
  65 ]) # LIBCFS_CONFIG_PANIC_DUMPLOG
  66
  67 #
  68 # Kernel version 3.11 introduced ktime_get_ts64
  69 #
  70 AC_DEFUN([LIBCFS_SRC_KTIME_GET_TS64], [
  71         LB2_LINUX_TEST_SRC([ktime_get_ts64], [
  72                 #include <linux/hrtimer.h>
  73                 #include <linux/ktime.h>
  74         ],[
  75                 struct timespec64 *ts = NULL;
  76
  77                 ktime_get_ts64(ts);
  78         ])
  79 ])
  80 AC_DEFUN([LIBCFS_KTIME_GET_TS64], [
  81         AC_MSG_CHECKING([does function 'ktime_get_ts64' exist])
  82         LB2_LINUX_TEST_RESULT([ktime_get_ts64], [
  83                 AC_DEFINE(HAVE_KTIME_GET_TS64, 1,
  84                         ['ktime_get_ts64' is available])
  85         ])
  86 ]) # LIBCFS_KTIME_GET_TS64
  87
  88 #
  89 # Kernel version 3.12-rc4 commit c2d816443ef30 added prepare_to_wait_event()
  90 #
  91 AC_DEFUN([LIBCFS_SRC_PREPARE_TO_WAIT_EVENT],[
  92         LB2_LINUX_TEST_SRC([prepare_to_wait_event], [
  93                 #include <linux/wait.h>
  94         ],[
  95                 prepare_to_wait_event(NULL, NULL, 0);
  96         ])
  97 ])
  98 AC_DEFUN([LIBCFS_PREPARE_TO_WAIT_EVENT],[
  99         AC_MSG_CHECKING([does function 'prepare_to_wait_event' exist])
 100         LB2_LINUX_TEST_RESULT([prepare_to_wait_event], [
 101                 AC_DEFINE(HAVE_PREPARE_TO_WAIT_EVENT, 1,
 102                         ['prepare_to_wait_event' is available])
 103         ])
 104 ]) # LIBCFS_PREPARE_TO_WAIT_EVENT
 105
 106 #
 107 # Linux kernel 3.12 introduced struct kernel_param_ops
 108 # This has been backported to all lustre supported
 109 # clients except RHEL6. We have to handle the differences.
 110 #
 111 AC_DEFUN([LIBCFS_SRC_KERNEL_PARAM_OPS],[
 112         LB2_LINUX_TEST_SRC([kernel_param_ops], [
 113                 #include <linux/module.h>
 114         ],[
 115                 struct kernel_param_ops ops;
 116
 117                 ops.set = NULL;
 118         ])
 119 ])
 120 AC_DEFUN([LIBCFS_KERNEL_PARAM_OPS],[
 121         AC_MSG_CHECKING([does 'struct kernel_param_ops' exist])
 122         LB2_LINUX_TEST_RESULT([kernel_param_ops], [
 123                 AC_DEFINE(HAVE_KERNEL_PARAM_OPS, 1,
 124                         ['struct kernel_param_ops' is available])
 125         ])
 126 ]) # LIBCFS_KERNEL_PARAM_OPS
 127
 128 #
 129 # Kernel version 3.12 introduced ktime_add
 130 #
 131 AC_DEFUN([LIBCFS_SRC_KTIME_ADD],[
 132         LB2_LINUX_TEST_SRC([ktime_add], [
 133                 #include <linux/hrtimer.h>
 134                 #include <linux/ktime.h>
 135         ],[
 136                 ktime_t start = ktime_set(0, 0);
 137                 ktime_t end = start;
 138                 ktime_t total;
 139
 140                 total = ktime_add(start, end);
 141         ])
 142 ])
 143 AC_DEFUN([LIBCFS_KTIME_ADD],[
 144         AC_MSG_CHECKING([does function 'ktime_add' exist])
 145         LB2_LINUX_TEST_RESULT([ktime_add], [
 146                 AC_DEFINE(HAVE_KTIME_ADD, 1, [ktime_add is available])
 147         ])
 148 ]) # LIBCFS_KTIME_ADD
 149
 150 #
 151 # Kernel version 3.12 introduced ktime_after
 152 #
 153 AC_DEFUN([LIBCFS_SRC_KTIME_AFTER],[
 154         LB2_LINUX_TEST_SRC([ktime_after], [
 155                 #include <linux/hrtimer.h>
 156                 #include <linux/ktime.h>
 157         ],[
 158                 ktime_t start = ktime_set(0, 0);
 159                 ktime_t end = start;
 160
 161                 ktime_after(start, end);
 162         ])
 163 ])
 164 AC_DEFUN([LIBCFS_KTIME_AFTER],[
 165         AC_MSG_CHECKING([does function 'ktime_after' exist])
 166         LB2_LINUX_TEST_RESULT([ktime_after], [
 167                 AC_DEFINE(HAVE_KTIME_AFTER, 1, [ktime_after is available])
 168         ])
 169 ]) # LIBCFS_KTIME_AFTER
 170
 171 #
 172 # Kernel version 3.12 introduced ktime_before
 173 # See linux commit 67cb9366ff5f99868100198efba5ca88aaa6ad25
 174 #
 175 AC_DEFUN([LIBCFS_SRC_KTIME_BEFORE],[
 176         LB2_LINUX_TEST_SRC([ktime_before], [
 177                 #include <linux/hrtimer.h>
 178                 #include <linux/ktime.h>
 179         ],[
 180                 ktime_t start = ktime_set(0, 0);
 181                 ktime_t end = start;
 182
 183                 ktime_before(start, end);
 184         ])
 185 ])
 186 AC_DEFUN([LIBCFS_KTIME_BEFORE],[
 187         AC_MSG_CHECKING([does function 'ktime_before' exist])
 188         LB2_LINUX_TEST_RESULT([ktime_before], [
 189                 AC_DEFINE(HAVE_KTIME_BEFORE, 1, [ktime_before is available])
 190         ])
 191 ]) # LIBCFS_KTIME_BEFORE
 192
 193 #
 194 # Kernel version 3.12 introduced ktime_compare
 195 #
 196 AC_DEFUN([LIBCFS_SRC_KTIME_COMPARE],[
 197         LB2_LINUX_TEST_SRC([ktime_compare], [
 198                 #include <linux/hrtimer.h>
 199                 #include <linux/ktime.h>
 200         ],[
 201                 ktime_t start = ktime_set(0, 0);
 202                 ktime_t end = start;
 203
 204                 ktime_compare(start, end);
 205         ])
 206 ])
 207 AC_DEFUN([LIBCFS_KTIME_COMPARE],[
 208         AC_MSG_CHECKING([does function 'ktime_compare' exist])
 209         LB2_LINUX_TEST_RESULT([ktime_compare], [
 210                 AC_DEFINE(HAVE_KTIME_COMPARE, 1,
 211                         [ktime_compare is available])
 212         ])
 213 ]) # LIBCFS_KTIME_COMPARE
 214
 215 #
 216 # FC19 3.12 kernel struct shrinker change
 217 #
 218 AC_DEFUN([LIBCFS_SRC_SHRINKER_COUNT],[
 219         LB2_LINUX_TEST_SRC([shrinker_count_objects], [
 220                 #include <linux/mmzone.h>
 221                 #include <linux/shrinker.h>
 222         ],[
 223                 struct shrinker shrinker;
 224
 225                 shrinker.count_objects = NULL;
 226         ])
 227 ])
 228 AC_DEFUN([LIBCFS_SHRINKER_COUNT],[
 229         AC_MSG_CHECKING([shrinker has 'count_objects'])
 230         LB2_LINUX_TEST_RESULT([shrinker_count_objects], [
 231                 AC_DEFINE(HAVE_SHRINKER_COUNT, 1,
 232                         [shrinker has count_objects member])
 233         ])
 234 ]) # LIBCFS_SHRINKER_COUNT
 235
 236 #
 237 # Kernel version 3.13 commit aace05097a0fd467230e39acb148be0fdaa90068
 238 # add match_wildcard() function.
 239 #
 240 AC_DEFUN([LIBCFS_SRC_MATCH_WILDCARD],[
 241         LB2_LINUX_TEST_SRC([match_wildcard], [
 242                 #include <linux/parser.h>
 243         ],[
 244                 bool match;
 245
 246                 match = match_wildcard(NULL, NULL);
 247         ])
 248 ])
 249 AC_DEFUN([LIBCFS_MATCH_WILDCARD],[
 250         AC_MSG_CHECKING([does function 'match_wildcard' exist])
 251         LB2_LINUX_TEST_RESULT([match_wildcard], [
 252                 AC_DEFINE(HAVE_MATCH_WILDCARD, 1,
 253                         [match_wildcard() is available])
 254         ])
 255 ]) # LIBCFS_MATCH_WILDCARD
 256
 257 #
 258 # LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
 259 #
 260 # v3.14-7405-g91b0abe36a7b added AS_EXITING flag with
 261 # mapping_exiting() and mapping_set_exiting()
 262 #
 263 AC_DEFUN([LIBCFS_SRC_HAVE_MAPPING_AS_EXITING_FLAG], [
 264 m4_pattern_allow([AS_EXITING])
 265         LB2_LINUX_TEST_SRC([mapping_exiting_exists], [
 266                 #include <linux/pagemap.h>
 267         ],[
 268                 enum mapping_flags flag = AS_EXITING;
 269                 (void)flag;
 270         ],[-Werror])
 271 ])
 272 AC_DEFUN([LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG], [
 273         AC_MSG_CHECKING([if enum mapping_flags has AS_EXITING flag])
 274         LB2_LINUX_TEST_RESULT([mapping_exiting_exists], [
 275                 AC_DEFINE(HAVE_MAPPING_AS_EXITING_FLAG, 1,
 276                         [enum mapping_flags has AS_EXITING flag])
 277         ])
 278 ]) # LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
 279
 280 #
 281 # LIBCFS_IOV_ITER_HAS_TYPE
 282 #
 283 # kernel 3.15-rc4 commit 71d8e532b1549a478e6a6a8a44f309d050294d00
 284 # start adding the tag to iov_iter
 285 #
 286 AC_DEFUN([LIBCFS_SRC_IOV_ITER_HAS_TYPE], [
 287         LB2_LINUX_TEST_SRC([iov_iter_has_type_member], [
 288                 #include <linux/uio.h>
 289         ],[
 290                 struct iov_iter iter = { .type = ITER_KVEC };
 291                 (void)iter;
 292         ],
 293         [-Werror])
 294 ])
 295 AC_DEFUN([LIBCFS_IOV_ITER_HAS_TYPE], [
 296         AC_MSG_CHECKING([if iov_iter has member type])
 297         LB2_LINUX_TEST_RESULT([iov_iter_has_type_member], [
 298                 AC_DEFINE(HAVE_IOV_ITER_HAS_TYPE_MEMBER, 1,
 299                         [if iov_iter has member type])
 300         ])
 301 ]) # LIBCFS_IOV_ITER_HAS_TYPE
 302
 303 #
 304 # LIBCFS_HAVE_NS_TO_TIMESPEC64
 305 #
 306 # Kernel version 3.16-rc3 commit a84d1169164b274f13b97a23ff235c000efe3b49
 307 # introduced struct __kernel_old_timeval
 308 #
 309 AC_DEFUN([LIBCFS_SRC_HAVE_NS_TO_TIMESPEC64],[
 310         LB2_LINUX_TEST_SRC([kernel_old_timeval], [
 311                 #include <linux/time.h>
 312         ],[
 313                 struct timespec64 kts;
 314
 315                 kts = ns_to_timespec64(0);
 316         ])
 317 ])
 318 AC_DEFUN([LIBCFS_HAVE_NS_TO_TIMESPEC64],[
 319         AC_MSG_CHECKING([does 'ns_to_timespec64()' exist])
 320         LB2_LINUX_TEST_RESULT([kernel_old_timeval], [
 321                 AC_DEFINE(HAVE_NS_TO_TIMESPEC64, 1,
 322                         [ns_to_timespec64() is available])
 323         ])
 324 ]) # LIBCFS_HAVE_NS_TO_TIMESPEC64
 325
 326 #
 327 # LIBCFS_HAVE_GLOB
 328 #
 329 # Kernel version 3.16 commit b01250856b25f4417c51aa33afc451fbf7da1484
 330 # added glob support to the Linux kernel
 331 #
 332 AC_DEFUN([LIBCFS_SRC_HAVE_GLOB],[
 333         LB2_LINUX_TEST_SRC([glob_match], [
 334                 #include <linux/glob.h>
 335         ],[
 336                 return glob_match(NULL, NULL);
 337         ],[-Werror])
 338 ])
 339 AC_DEFUN([LIBCFS_HAVE_GLOB],[
 340         AC_MSG_CHECKING([does 'glob_match()' exist])
 341         LB2_LINUX_TEST_RESULT([glob_match], [
 342                 AC_DEFINE(HAVE_GLOB, 1,
 343                         [glob_match() is available])
 344         ])
 345 ]) # LIBCFS_HAVE_GLOB
 346
 347 #
 348 # Kernel version 3.17 changed hlist_add_after to
 349 # hlist_add_behind
 350 #
 351 AC_DEFUN([LIBCFS_SRC_HLIST_ADD_AFTER],[
 352         LB2_LINUX_TEST_SRC([hlist_add_after], [
 353                 #include <linux/list.h>
 354         ],[
 355                 hlist_add_after(NULL, NULL);
 356         ])
 357 ])
 358 AC_DEFUN([LIBCFS_HLIST_ADD_AFTER],[
 359         AC_MSG_CHECKING([does function 'hlist_add_after' exist])
 360         LB2_LINUX_TEST_RESULT([hlist_add_after], [
 361                 AC_DEFINE(HAVE_HLIST_ADD_AFTER, 1,
 362                         [hlist_add_after is available])
 363         ])
 364 ]) # LIBCFS_HLIST_ADD_AFTER
 365
 366 #
 367 # Kernel version 3.17 introduced struct timespec64
 368 #
 369 AC_DEFUN([LIBCFS_SRC_TIMESPEC64],[
 370         LB2_LINUX_TEST_SRC([timespec64], [
 371                 #include <linux/time.h>
 372         ],[
 373                 struct timespec64 ts;
 374
 375                 ts.tv_sec = 0;
 376                 ts.tv_nsec = 0;
 377         ])
 378 ])
 379 AC_DEFUN([LIBCFS_TIMESPEC64],[
 380         AC_MSG_CHECKING([does 'struct timespec64' exist])
 381         LB2_LINUX_TEST_RESULT([timespec64], [
 382                 AC_DEFINE(HAVE_TIMESPEC64, 1,
 383                         ['struct timespec64' is available])
 384         ])
 385 ]) # LIBCFS_TIMESPEC64
 386
 387 #
 388 # Kernel version 3.17 introduced ktime_get_real_ts64
 389 #
 390 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_TS64],[
 391         LB2_LINUX_TEST_SRC([ktime_get_real_ts64], [
 392                 #include <linux/ktime.h>
 393         ],[
 394                 struct timespec64 *ts = NULL;
 395
 396                 ktime_get_real_ts64(ts);
 397         ])
 398 ])
 399 AC_DEFUN([LIBCFS_KTIME_GET_REAL_TS64],[
 400         AC_MSG_CHECKING([does function 'ktime_get_real_ts64' exist])
 401         LB2_LINUX_TEST_RESULT([ktime_get_real_ts64], [
 402                 AC_DEFINE(HAVE_KTIME_GET_REAL_TS64, 1,
 403                         ['ktime_get_real_ts64' is available])
 404         ])
 405 ]) # LIBCFS_KTIME_GET_REAL_TS64
 406
 407 #
 408 # Kernel version 3.17 introduced ktime_get_real_seconds
 409 #
 410 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_SECONDS],[
 411         LB2_LINUX_TEST_SRC([ktime_get_real_seconds], [
 412                 #include <linux/hrtimer.h>
 413                 #include <linux/ktime.h>
 414         ],[
 415                 time64_t now;
 416
 417                 now = ktime_get_real_seconds();
 418         ])
 419 ])
 420 AC_DEFUN([LIBCFS_KTIME_GET_REAL_SECONDS],[
 421         AC_MSG_CHECKING([does function 'ktime_get_real_ts64' exist])
 422         LB2_LINUX_TEST_RESULT([ktime_get_real_seconds], [
 423                 AC_DEFINE(HAVE_KTIME_GET_REAL_SECONDS, 1,
 424                         ['ktime_get_real_seconds' is available])
 425         ])
 426 ]) # LIBCFS_KTIME_GET_REAL_SECONDS
 427
 428 #
 429 # Kernel version 3.17 created ktime_get_ns wrapper
 430 #
 431 AC_DEFUN([LIBCFS_SRC_KTIME_GET_NS],[
 432         LB2_LINUX_TEST_SRC([ktime_get_ns], [
 433                 #include <linux/hrtimer.h>
 434                 #include <linux/ktime.h>
 435         ],[
 436                 u64 nanoseconds;
 437
 438                 nanoseconds = ktime_get_ns();
 439         ])
 440 ])
 441 AC_DEFUN([LIBCFS_KTIME_GET_NS],[
 442         AC_MSG_CHECKING([does function 'ktime_get_ns' exist])
 443         LB2_LINUX_TEST_RESULT([ktime_get_ns], [],[
 444                 AC_DEFINE(NEED_KTIME_GET_NS, 1,
 445                         ['ktime_get_ns' is not available])
 446         ])
 447 ]) # LIBCFS_KTIME_GET_NS
 448
 449 #
 450 # Kernel version 3.17 created ktime_get_real_ns wrapper
 451 #
 452 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_NS],[
 453         LB2_LINUX_TEST_SRC([ktime_get_real_ns], [
 454                 #include <linux/hrtimer.h>
 455                 #include <linux/ktime.h>
 456         ],[
 457                 u64 nanoseconds;
 458
 459                 nanoseconds = ktime_get_real_ns();
 460         ])
 461 ])
 462 AC_DEFUN([LIBCFS_KTIME_GET_REAL_NS],[
 463         AC_MSG_CHECKING([does function 'ktime_get_real_ns' exist])
 464         LB2_LINUX_TEST_RESULT([ktime_get_real_ns], [],[
 465                 AC_DEFINE(NEED_KTIME_GET_REAL_NS, 1,
 466                         ['ktime_get_real_ns' is not available])
 467         ])
 468 ]) # LIBCFS_KTIME_GET_REAL_NS
 469
 470 #
 471 # Kernel version 3.17 introduced ktime_to_timespec64
 472 #
 473 AC_DEFUN([LIBCFS_SRC_KTIME_TO_TIMESPEC64],[
 474         LB2_LINUX_TEST_SRC([ktime_to_timespec64], [
 475                 #include <linux/hrtimer.h>
 476                 #include <linux/ktime.h>
 477         ],[
 478                 ktime_t now = ktime_set(0, 0);
 479                 struct timespec64 ts;
 480
 481                 ts = ktime_to_timespec64(now);
 482         ])
 483 ])
 484 AC_DEFUN([LIBCFS_KTIME_TO_TIMESPEC64],[
 485         AC_MSG_CHECKING([does function 'ktime_to_timespec64' exist])
 486         LB2_LINUX_TEST_RESULT([ktime_to_timespec64], [
 487                 AC_DEFINE(HAVE_KTIME_TO_TIMESPEC64, 1,
 488                         ['ktime_to_timespec64' is available])
 489         ])
 490 ]) # LIBCFS_KTIME_TO_TIMESPEC64
 491
 492 #
 493 # Kernel version 3.17 introduced timespec64_sub
 494 #
 495 AC_DEFUN([LIBCFS_SRC_TIMESPEC64_SUB],[
 496         LB2_LINUX_TEST_SRC([timespec64_sub], [
 497                 #include <linux/time.h>
 498         ],[
 499                 struct timespec64 later = { }, earlier = { }, diff;
 500
 501                 diff = timespec64_sub(later, earlier);
 502         ])
 503 ])
 504 AC_DEFUN([LIBCFS_TIMESPEC64_SUB],[
 505         AC_MSG_CHECKING([does function 'timespec64_sub' exist])
 506         LB2_LINUX_TEST_RESULT([timespec64_sub], [
 507                 AC_DEFINE(HAVE_TIMESPEC64_SUB, 1,
 508                         ['timespec64_sub' is available])
 509         ])
 510 ]) # LIBCFS_TIMESPEC64_SUB
 511
 512 #
 513 # Kernel version 3.17 introduced timespec64_to_ktime
 514 #
 515 AC_DEFUN([LIBCFS_SRC_TIMESPEC64_TO_KTIME],[
 516         LB2_LINUX_TEST_SRC([timespec64_to_ktime], [
 517         #include <linux/ktime.h>
 518         ],[
 519                 struct timespec64 ts;
 520                 ktime_t now;
 521
 522                 now = timespec64_to_ktime(ts);
 523         ])
 524 ])
 525 AC_DEFUN([LIBCFS_TIMESPEC64_TO_KTIME],[
 526         AC_MSG_CHECKING([does function 'timespec64_to_ktime' exist])
 527         LB2_LINUX_TEST_RESULT([timespec64_to_ktime], [
 528                 AC_DEFINE(HAVE_TIMESPEC64_TO_KTIME, 1,
 529                         ['timespec64_to_ktime' is available])
 530         ])
 531 ]) # LIBCFS_TIMESPEC64_TO_KTIME
 532
 533 #
 534 # Kernel version 3.19 introduced ktime_get_seconds
 535 #
 536 AC_DEFUN([LIBCFS_SRC_KTIME_GET_SECONDS],[
 537         LB2_LINUX_TEST_SRC([ktime_get_seconds], [
 538                 #include <linux/ktime.h>
 539         ],[
 540                 time64_t now;
 541
 542                 now = ktime_get_seconds();
 543         ])
 544 ])
 545 AC_DEFUN([LIBCFS_KTIME_GET_SECONDS],[
 546         AC_MSG_CHECKING([does function 'ktime_get_seconds' exist])
 547         LB2_LINUX_TEST_RESULT([ktime_get_seconds], [
 548                 AC_DEFINE(HAVE_KTIME_GET_SECONDS, 1,
 549                         ['ktime_get_seconds' is available])
 550         ])
 551 ]) # LIBCFS_KTIME_GET_SECONDS
 552
 553 #
 554 # Kernel version 3.19 commit v3.18-rc2-26-g61ada528dea0
 555 # introduce wait_woken()
 556 #
 557 AC_DEFUN([LIBCFS_SRC_WAIT_WOKEN],[
 558         LB2_LINUX_TEST_SRC([wait_woken], [
 559                 #include <linux/wait.h>
 560         ],[
 561                 wait_woken(NULL, 0, 0);
 562         ])
 563 ])
 564 AC_DEFUN([LIBCFS_WAIT_WOKEN],[
 565         AC_MSG_CHECKING([does function 'wait_woken' exist])
 566         LB2_LINUX_TEST_RESULT([wait_woken], [
 567                 AC_DEFINE(HAVE_WAIT_WOKEN, 1,
 568                         ['wait_woken, is available'])
 569         ])
 570 ]) # LIBCFS_WAIT_WOKEN
 571
 572 #
 573 # Kernel version 4.0 commit 41fbf3b39d5eca01527338b4d0ee15ee1ae1023c
 574 # introduced the helper function ktime_ms_delta.
 575 #
 576 AC_DEFUN([LIBCFS_SRC_KTIME_MS_DELTA],[
 577         LB2_LINUX_TEST_SRC([ktime_ms_delta], [
 578                 #include <linux/ktime.h>
 579         ],[
 580                 ktime_t start = ktime_set(0, 0);
 581                 ktime_t end = start;
 582
 583                 ktime_ms_delta(start, end);
 584         ])
 585 ])
 586 AC_DEFUN([LIBCFS_KTIME_MS_DELTA],[
 587         AC_MSG_CHECKING([does function 'ktime_ms_delta' exist])
 588         LB2_LINUX_TEST_RESULT([ktime_ms_delta], [
 589                 AC_DEFINE(HAVE_KTIME_MS_DELTA, 1,
 590                         ['ktime_ms_delta' is available])
 591         ])
 592 ]) # LIBCFS_KTIME_MS_DELTA
 593
 594 #
 595 # Kernel version 4.1 commit b51d23e4e9fea6f264d39535c2a62d1f51e7ccc3
 596 # create per module locks which added kernel_param_[un]lock(). Older
 597 # kernels you have to use __kernel_param_[un]lock(). In that case its
 598 # a global lock for all modules but that is okay since its a rare event.
 599 #
 600 AC_DEFUN([LIBCFS_SRC_KERNEL_PARAM_LOCK],[
 601         LB2_LINUX_TEST_SRC([kernel_param_lock], [
 602                 #include <linux/moduleparam.h>
 603         ],[
 604                 kernel_param_lock(NULL);
 605                 kernel_param_unlock(NULL);
 606         ])
 607 ])
 608 AC_DEFUN([LIBCFS_KERNEL_PARAM_LOCK],[
 609         AC_MSG_CHECKING([does function 'kernel_param_[un]lock' exist])
 610         LB2_LINUX_TEST_RESULT([kernel_param_lock], [
 611                 AC_DEFINE(HAVE_KERNEL_PARAM_LOCK, 1,
 612                         ['kernel_param_[un]lock' is available])
 613         ])
 614 ]) # LIBCFS_KERNEL_PARAM_LOCK
 615
 616 #
 617 # LIBCFS_STRSCPY_EXISTS
 618 #
 619 # Linux commit v4.2-rc1-2-g30035e45753b
 620 #  string: provide strscpy()
 621 #
 622 # If strscpy exists, prefer it over strlcpy
 623 #
 624 AC_DEFUN([LIBCFS_SRC_STRSCPY_EXISTS], [
 625         LB2_LINUX_TEST_SRC([strscpy_exists], [
 626                 #include <linux/string.h>
 627         ],[
 628                 strscpy((char *)NULL, (const char *)NULL, 0);
 629         ],[-Werror])
 630 ])
 631 AC_DEFUN([LIBCFS_STRSCPY_EXISTS], [
 632         AC_MSG_CHECKING([if kernel strscpy is available])
 633         LB2_LINUX_TEST_RESULT([strscpy_exists], [
 634                 AC_DEFINE(HAVE_STRSCPY, 1,
 635                         [kernel strscpy is available])
 636         ])
 637 ]) # LIBCFS_STRSCPY_EXISTS
 638
 639 #
 640 # Kernel version 4.2 changed topology_thread_cpumask
 641 # to topology_sibling_cpumask
 642 #
 643 AC_DEFUN([LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 644         LB2_LINUX_TEST_SRC([topology_sibling_cpumask], [
 645                 #include <linux/topology.h>
 646         ],[
 647                 const struct cpumask *mask;
 648
 649                 mask = topology_sibling_cpumask(0);
 650         ])
 651 ])
 652 AC_DEFUN([LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 653         AC_MSG_CHECKING([does function 'topology_sibling_cpumask' exist])
 654         LB2_LINUX_TEST_RESULT([topology_sibling_cpumask], [
 655                 AC_DEFINE(HAVE_TOPOLOGY_SIBLING_CPUMASK, 1,
 656                         [topology_sibling_cpumask is available])
 657         ])
 658 ]) # LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
 659
 660 #
 661 # Kernel version 4.4 commit ef951599074ba4fad2d0efa0a977129b41e6d203
 662 # introduced kstrtobool and kstrtobool_from_user.
 663 #
 664 AC_DEFUN([LIBCFS_SRC_KSTRTOBOOL_FROM_USER], [
 665         LB2_LINUX_TEST_SRC([kstrtobool_from_user], [
 666                 #include <linux/kernel.h>
 667         ],[
 668                 bool result;
 669                 return kstrtobool_from_user(NULL, 0, &result);
 670         ])
 671 ])
 672 AC_DEFUN([LIBCFS_KSTRTOBOOL_FROM_USER], [
 673         AC_MSG_CHECKING([if Linux kernel has 'kstrtobool_from_user'])
 674         LB2_LINUX_TEST_RESULT([kstrtobool_from_user], [
 675                 AC_DEFINE(HAVE_KSTRTOBOOL_FROM_USER, 1,
 676                         [kernel has kstrtobool_from_user])
 677         ])
 678 ]) # LIBCFS_KSTRTOBOOL_FROM_USER
 679
 680 #
 681 # LIBCFS_NETLINK_CALLBACK_START
 682 #
 683 # Kernel version 4.4-rc3 commit fc9e50f5a5a4e1fa9ba2756f745a13e693cf6a06
 684 # added a start function callback for struct netlink_callback
 685 #
 686 AC_DEFUN([LIBCFS_SRC_NETLINK_CALLBACK_START], [
 687         LB2_LINUX_TEST_SRC([cb_start], [
 688                 #include <net/genetlink.h>
 689         ],[
 690                 struct genl_ops ops;
 691
 692                 ops.start = NULL;
 693         ],[])
 694 ])
 695 AC_DEFUN([LIBCFS_NETLINK_CALLBACK_START], [
 696         AC_MSG_CHECKING([if struct genl_ops has start callback])
 697         LB2_LINUX_TEST_RESULT([cb_start], [
 698                 AC_DEFINE(HAVE_NETLINK_CALLBACK_START, 1,
 699                         [struct genl_ops has 'start' callback])
 700         ])
 701 ]) # LIBCFS_NETLINK_CALLBACK_START
 702
 703 #
 704 # Kernel version 4.5-rc1 commit d12481bc58fba89427565f8592e88446ec084a24
 705 # added crypto hash helpers
 706 #
 707 AC_DEFUN([LIBCFS_SRC_CRYPTO_HASH_HELPERS], [
 708         LB2_LINUX_TEST_SRC([crypto_hash_helpers], [
 709                 #include <crypto/hash.h>
 710         ],[
 711                 crypto_ahash_alg_name(NULL);
 712                 crypto_ahash_driver_name(NULL);
 713         ])
 714 ])
 715 AC_DEFUN([LIBCFS_CRYPTO_HASH_HELPERS], [
 716         AC_MSG_CHECKING([does crypto hash helper functions exist])
 717         LB2_LINUX_TEST_RESULT([crypto_hash_helpers], [
 718                 AC_DEFINE(HAVE_CRYPTO_HASH_HELPERS, 1,
 719                         [crypto hash helper functions are available])
 720         ])
 721 ]) # LIBCFS_CRYPTO_HASH_HELPERS
 722
 723 #
 724 # Kernel version 4.5-rc1 commit 3502cad73c4bbf8f6365d539e814159275252c59
 725 # introduced rhashtable_replace_fast
 726 #
 727 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_REPLACE], [
 728         LB2_LINUX_TEST_SRC([rhashtable_replace_fast], [
 729                 #include <linux/rhashtable.h>
 730         ],[
 731                 const struct rhashtable_params params = { 0 };
 732
 733                 rhashtable_replace_fast(NULL, NULL, NULL, params);
 734         ])
 735 ])
 736 AC_DEFUN([LIBCFS_RHASHTABLE_REPLACE], [
 737         AC_MSG_CHECKING([if 'rhashtable_replace_fast' exists])
 738         LB2_LINUX_TEST_RESULT([rhashtable_replace_fast], [
 739                 AC_DEFINE(HAVE_RHASHTABLE_REPLACE, 1,
 740                         [rhashtable_replace_fast() is available])
 741         ])
 742 ]) # LIBCFS_RHASHTABLE_REPLACE
 743
 744 #
 745 # Kernel version 4.5-rc3 commit 2fe829aca9d7bed5fd6b49c6a1452e5e486b6cc3dd
 746 # made kset_find_obj() exportable to modules
 747 #
 748 AC_DEFUN([LIBCFS_EXPORT_KSET_FIND_OBJ], [
 749 LB_CHECK_EXPORT([kset_find_obj], [lib/kobject.c],
 750         [AC_DEFINE(HAVE_KSET_FIND_OBJ, 1,
 751                 [kset_find_obj is exported by the kernel])])
 752 ]) # LIBCFS_EXPORT_KSET_FIND_OBJ
 753
 754 #
 755 # Kernel version 4.6+ commit ef703f49a6c5b909a85149bb6625c4ed0d697186
 756 # fixed the brokenness of hash_64(). The fix removed GOLDEN_RATIO_PRIME_64
 757 # since it was a poor prime value.
 758 #
 759 AC_DEFUN([LIBCFS_SRC_BROKEN_HASH_64], [
 760         LB2_LINUX_TEST_SRC([broken_hash_64], [
 761         #include <linux/hash.h>
 762         ],[
 763                 int tmp = GOLDEN_RATIO_PRIME_64;
 764         ])
 765 ])
 766 AC_DEFUN([LIBCFS_BROKEN_HASH_64], [
 767         AC_MSG_CHECKING([kernel has fixed hash_64()])
 768         LB2_LINUX_TEST_RESULT([broken_hash_64], [
 769                 AC_DEFINE(HAVE_BROKEN_HASH_64, 1, [kernel hash_64() is broken])
 770         ])
 771 ]) # LIBCFS_BROKEN_HASH_64
 772
 773 #
 774 # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 775 #
 776 # linux 4.6 kernel changed stacktrace_ops address to return an int
 777 #
 778 AC_DEFUN([LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 779         LB2_LINUX_TEST_SRC([stacktrace_ops_address_return_int], [
 780                 #include <asm/stacktrace.h>
 781         ],[
 782                 int rc;
 783
 784                 rc = ((struct stacktrace_ops *)0)->address(NULL, 0, 0);
 785         ])
 786 ])
 787 AC_DEFUN([LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 788         AC_MSG_CHECKING([if 'struct stacktrace_ops' address function returns an int])
 789         LB2_LINUX_TEST_RESULT([stacktrace_ops_address_return_int], [
 790                 AC_DEFINE(STACKTRACE_OPS_ADDRESS_RETURN_INT, 1,
 791                         ['struct stacktrace_ops' address function returns an int])
 792         ])
 793 ]) # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 794
 795 #
 796 # Kernel version 4.6 removed both struct task_struct and struct mm_struct
 797 # arguments to get_user_pages
 798 #
 799 AC_DEFUN([LIBCFS_SRC_GET_USER_PAGES_6ARG], [
 800         LB2_LINUX_TEST_SRC([get_user_pages_6arg], [
 801                 #include <linux/mm.h>
 802         ],[
 803                 int rc;
 804
 805                 rc = get_user_pages(0, 0, 0, 0, NULL, NULL);
 806         ])
 807 ])
 808 AC_DEFUN([LIBCFS_GET_USER_PAGES_6ARG], [
 809         AC_MSG_CHECKING([if 'get_user_pages()' takes 6 arguments])
 810         LB2_LINUX_TEST_RESULT([get_user_pages_6arg], [
 811                 AC_DEFINE(HAVE_GET_USER_PAGES_6ARG, 1,
 812                         [get_user_pages takes 6 arguments])
 813         ])
 814 ]) # LIBCFS_GET_USER_PAGES_6ARG
 815
 816 #
 817 # LIBCFS_STRINGHASH
 818 #
 819 # 4.6 kernel created stringhash.h which moved stuff out of dcache.h
 820 # commit f4bcbe792b8f434e32487cff9d9e30ab45a3ce02
 821 #
 822 AC_DEFUN([LIBCFS_STRINGHASH], [
 823 LB_CHECK_LINUX_HEADER([linux/stringhash.h], [
 824         AC_DEFINE(HAVE_STRINGHASH, 1,
 825                 [stringhash.h is present])])
 826 ]) # LIBCFS_STRINGHASH
 827
 828 #
 829 # LIBCFS_RHASHTABLE_INSERT_FAST
 830 #
 831 # 4.7+ kernel commit 5ca8cc5bf11faed257c762018aea9106d529232f
 832 # changed __rhashtable_insert_fast to support the new function
 833 # rhashtable_lookup_get_insert_key().
 834 #
 835 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_INSERT_FAST], [
 836         LB2_LINUX_TEST_SRC([rhashtable_insert_fast], [
 837                 #include <linux/rhashtable.h>
 838         ],[
 839                 const struct rhashtable_params params = { 0 };
 840                 int rc;
 841
 842                 rc = __rhashtable_insert_fast(NULL, NULL, NULL, params);
 843         ],
 844         [-Werror])
 845 ])
 846 AC_DEFUN([LIBCFS_RHASHTABLE_INSERT_FAST], [
 847         AC_MSG_CHECKING([if internal '__rhashtable_insert_fast()' returns int])
 848         LB2_LINUX_TEST_RESULT([rhashtable_insert_fast], [
 849                 AC_DEFINE(HAVE_HASHTABLE_INSERT_FAST_RETURN_INT, 1,
 850                           ['__rhashtable_insert_fast()' returns int])
 851         ])
 852 ]) # LIBCFS_RHASHTABLE_INSERT_FAST
 853
 854 #
 855 # Kernel version 4.7-rc1 commit 8f6fd83c6c5ec66a4a70c728535ddcdfef4f3697
 856 # added 3rd arg to rhashtable_walk_init
 857 #
 858 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG], [
 859         LB2_LINUX_TEST_SRC([rhashtable_walk_init], [
 860                 #include <linux/gfp.h>
 861                 #include <linux/rhashtable.h>
 862         ],[
 863                 rhashtable_walk_init(NULL, NULL, GFP_KERNEL);
 864         ])
 865 ])
 866 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_INIT_3ARG], [
 867         AC_MSG_CHECKING([if 'rhashtable_walk_init' has 3 args])
 868         LB2_LINUX_TEST_RESULT([rhashtable_walk_init], [
 869                 AC_DEFINE(HAVE_3ARG_RHASHTABLE_WALK_INIT, 1,
 870                         [rhashtable_walk_init() has 3 args])
 871         ])
 872 ]) # LIBCFS_RHASHTABLE_WALK_INIT_3ARG
 873
 874 #
 875 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 876 # introduced rhashtable_lookup
 877 #
 878 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_LOOKUP], [
 879         LB2_LINUX_TEST_SRC([rhashtable_lookup], [
 880                 #include <linux/rhashtable.h>
 881         ],[
 882                 const struct rhashtable_params params = { 0 };
 883                 void *ret;
 884
 885                 ret = rhashtable_lookup(NULL, NULL, params);
 886         ])
 887 ])
 888 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP], [
 889         AC_MSG_CHECKING([if 'rhashtable_lookup' exist])
 890         LB2_LINUX_TEST_RESULT([rhashtable_lookup], [
 891                 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP, 1,
 892                         [rhashtable_lookup() is available])
 893         ])
 894 ]) # LIBCFS_RHASHTABLE_LOOKUP
 895
 896 #
 897 # LIBCFS_RHLTABLE
 898 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 899 # created the rhlist interface to allow inserting duplicate objects
 900 # into the same table.
 901 #
 902 AC_DEFUN([LIBCFS_SRC_RHLTABLE], [
 903         LB2_LINUX_TEST_SRC([rhtable], [
 904                 #include <linux/rhashtable.h>
 905         ],[
 906                 struct rhltable *hlt = NULL;
 907
 908                 rhltable_destroy(hlt);
 909         ])
 910 ])
 911 AC_DEFUN([LIBCFS_RHLTABLE], [
 912         AC_MSG_CHECKING([does 'struct rhltable' exist])
 913         LB2_LINUX_TEST_RESULT([rhtable], [
 914                 AC_DEFINE(HAVE_RHLTABLE, 1, [struct rhltable exist])
 915         ])
 916 ]) # LIBCFS_RHLTABLE
 917
 918 #
 919 # LIBCFS_STACKTRACE_OPS
 920 #
 921 # Kernel version 4.8 commit c8fe4609827aedc9c4b45de80e7cdc8ccfa8541b
 922 # removed both struct stacktrace_ops and dump_trace() function
 923 #
 924 AC_DEFUN([LIBCFS_SRC_STACKTRACE_OPS], [
 925         LB2_LINUX_TEST_SRC([stacktrace_ops], [
 926                 struct task_struct;
 927                 struct pt_regs;
 928                 #include <asm/stacktrace.h>
 929         ],[
 930                 struct stacktrace_ops ops;
 931                 ops.stack = NULL;
 932         ])
 933 ])
 934 AC_DEFUN([LIBCFS_STACKTRACE_OPS], [
 935 AC_MSG_CHECKING([if 'struct stacktrace_ops' exists])
 936         LB2_LINUX_TEST_RESULT([stacktrace_ops], [
 937                 AC_DEFINE(HAVE_STACKTRACE_OPS, 1,
 938                         [struct stacktrace_ops exists])
 939         ])
 940 ]) # LIBCFS_STACKTRACE_OPS
 941
 942 #
 943 # LIBCFS_RHASHTABLE_WALK_ENTER
 944 #
 945 # Kernel version 4.9-rc1 commit 246779dd090bd1b74d2652b3a6ca7759f593b27a
 946 # introduced rhashtable_walk_enter
 947 #
 948 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_WALK_ENTER], [
 949         LB2_LINUX_TEST_SRC([rhashtable_walk_enter], [
 950                 #include <linux/rhashtable.h>
 951         ],[
 952                 rhashtable_walk_enter(NULL, NULL);
 953         ])
 954 ])
 955 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_ENTER], [
 956         AC_MSG_CHECKING([if 'rhashtable_walk_enter' exists])
 957         LB2_LINUX_TEST_RESULT([rhashtable_walk_enter], [
 958                 AC_DEFINE(HAVE_RHASHTABLE_WALK_ENTER, 1,
 959                         [rhashtable_walk_enter() is available])
 960         ])
 961 ]) # LIBCFS_RHASHTABLE_WALK_ENTER
 962
 963 #
 964 # Kernel version 4.9 commit 768ae309a96103ed02eb1e111e838c87854d8b51
 965 # mm: replace get_user_pages() write/force parameters with gup_flags
 966 #
 967 AC_DEFUN([LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS], [
 968         LB2_LINUX_TEST_SRC([get_user_pages_gup_flags], [
 969                 #include <linux/mm.h>
 970         ],[
 971                 int rc;
 972                 rc = get_user_pages(0, 0, FOLL_WRITE, NULL, NULL);
 973         ])
 974 ])
 975 AC_DEFUN([LIBCFS_GET_USER_PAGES_GUP_FLAGS], [
 976         AC_MSG_CHECKING([if 'get_user_pages()' takes gup_flags in arguments])
 977         LB2_LINUX_TEST_RESULT([get_user_pages_gup_flags], [
 978                 AC_DEFINE(HAVE_GET_USER_PAGES_GUP_FLAGS, 1,
 979                         [get_user_pages takes gup_flags in arguments])
 980                 ])
 981 ]) # LIBCFS_GET_USER_PAGES_GUP_FLAGS
 982
 983 #
 984 # Kernel version 4.10 commit 7b737965b33188bd3dbb44e938535c4006d97fbb
 985 # libcfs: Convert to hotplug state machine
 986 #
 987 AC_DEFUN([LIBCFS_SRC_HOTPLUG_STATE_MACHINE], [
 988         LB2_LINUX_TEST_SRC([cpu_hotplug_state_machine], [
 989                 #include <linux/cpuhotplug.h>
 990         ],[
 991                 cpuhp_remove_state(CPUHP_LUSTRE_CFS_DEAD);
 992         ])
 993 ])
 994 AC_DEFUN([LIBCFS_HOTPLUG_STATE_MACHINE], [
 995         AC_MSG_CHECKING([if libcfs supports CPU hotplug state machine])
 996         LB2_LINUX_TEST_RESULT([cpu_hotplug_state_machine], [
 997                 AC_DEFINE(HAVE_HOTPLUG_STATE_MACHINE, 1,
 998                         [hotplug state machine is supported])
 999         ])
1000 ]) # LIBCFS_HOTPLUG_STATE_MACHINE
1001
1002 #
1003 # Kernel version 4.10-rc3 commit f405df5de3170c00e5c54f8b7cf4766044a032ba
1004 # introduced refcount_t which is atomic_t plus over flow guards.
1005 #
1006 AC_DEFUN([LIBCFS_REFCOUNT_T], [
1007 tmp_flags="$EXTRA_KCFLAGS"
1008 EXTRA_KCFLAGS="-Werror"
1009 LB_CHECK_LINUX_HEADER([linux/refcount.h], [
1010         AC_DEFINE(HAVE_REFCOUNT_T, 1,
1011                 [refcount_t is supported])
1012 ])
1013 EXTRA_KCFLAGS="$tmp_flags"
1014 ]) # LIBCFS_REFCOUNT_T
1015
1016 #
1017 # Kernel version 4.12 commit 499118e966f1d2150bd66647c8932343c4e9a0b8
1018 # introduce memalloc_noreclaim_{save,restore}
1019 #
1020 AC_DEFUN([LIBCFS_SRC_MEMALLOC_NORECLAIM], [
1021         LB2_LINUX_TEST_SRC([memalloc_noreclaim], [
1022                 #include <linux/sched/mm.h>
1023         ],[
1024                 int flag = memalloc_noreclaim_save();
1025                 memalloc_noreclaim_restore(flag);
1026         ])
1027 ])
1028 AC_DEFUN([LIBCFS_MEMALLOC_NORECLAIM], [
1029         AC_MSG_CHECKING([if memalloc_noreclaim_{save,restore} exist])
1030         LB2_LINUX_TEST_RESULT([memalloc_noreclaim], [
1031                 AC_DEFINE(HAVE_MEMALLOC_RECLAIM, 1,
1032                         [memalloc_noreclaim_{save,restore}() is supported])
1033         ])
1034 ]) # LIBCFS_MEMALLOC_NORECLAIM
1035
1036 #
1037 # LIBCFS_SCHED_HEADERS
1038 #
1039 # 4.11 has broken up sched.h into more headers.
1040 #
1041 AC_DEFUN([LIBCFS_SCHED_HEADERS], [
1042 LB_CHECK_LINUX_HEADER([linux/sched/signal.h], [
1043         AC_DEFINE(HAVE_SCHED_HEADERS, 1,
1044                 [linux/sched header directory exist])])
1045 ]) # LIBCFS_SCHED_HEADERS
1046
1047 #
1048 # Kernel version 4.11-rc1 commit 2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e
1049 # introduce kref_read
1050 #
1051 AC_DEFUN([LIBCFS_SRC_KREF_READ], [
1052         LB2_LINUX_TEST_SRC([kref_read], [
1053                 #include <linux/kref.h>
1054         ],[
1055                 kref_read(NULL);
1056         ])
1057 ])
1058 AC_DEFUN([LIBCFS_KREF_READ], [
1059         AC_MSG_CHECKING([if 'kref_read' exists])
1060         LB2_LINUX_TEST_RESULT([kref_read], [
1061                 AC_DEFINE(HAVE_KREF_READ, 1, [kref_read() is available])
1062         ])
1063 ]) # LIBCFS_KREF_READ
1064
1065 #
1066 # Kernel version 4.11-rc1 commit da20420f83ea0fbcf3d03afda08d971ea1d8a356
1067 # introduced rht_bucket_var
1068 #
1069 AC_DEFUN([LIBCFS_SRC_RHT_BUCKET_VAR], [
1070         LB2_LINUX_TEST_SRC([rht_bucket_var], [
1071                 #include <linux/rhashtable.h>
1072         ],[
1073                 rht_bucket_var(NULL, 0);
1074         ])
1075 ])
1076 AC_DEFUN([LIBCFS_RHT_BUCKET_VAR], [
1077         AC_MSG_CHECKING([if 'rht_bucket_var' exists])
1078         LB2_LINUX_TEST_RESULT([rht_bucket_var], [
1079                 AC_DEFINE(HAVE_RHT_BUCKET_VAR, 1,
1080                         [rht_bucket_var() is available])
1081         ])
1082 ]) # LIBCFS_RHT_BUCKET_VAR
1083
1084 #
1085 # Kernel version 4.11-rc5 commit fceb6435e85298f747fee938415057af837f5a8a
1086 # began the enhanchement of Netlink with extended ACK struct for advanced
1087 # error handling. By commit 7ab606d1609dd6dfeae9c8ad0a8a4e051d831e46 we
1088 # had full support for this new feature.
1089 #
1090 AC_DEFUN([LIBCFS_SRC_NL_EXT_ACK], [
1091         LB2_LINUX_TEST_SRC([netlink_ext_ack], [
1092                 #include <net/genetlink.h>
1093         ],[
1094                 struct genl_info info;
1095
1096                 info.extack = NULL;
1097         ])
1098 ])
1099 AC_DEFUN([LIBCFS_NL_EXT_ACK], [
1100         AC_MSG_CHECKING([if Netlink supports netlink_ext_ack])
1101         LB2_LINUX_TEST_RESULT([netlink_ext_ack], [
1102                 AC_DEFINE(HAVE_NL_PARSE_WITH_EXT_ACK, 1,
1103                         [netlink_ext_ack is an argument to nla_parse type function])
1104         ])
1105 ]) # LIBCFS_NL_EXT_ACK
1106
1107 #
1108 # Kernel version 4.11 commit f9fe1c12d126f9887441fa5bb165046f30ddd4b5
1109 # introduced rhashtable_lookup_get_insert_fast
1110 #
1111 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
1112         LB2_LINUX_TEST_SRC([rhashtable_lookup_get_insert_fast], [
1113                 #include <linux/rhashtable.h>
1114         ],[
1115                 const struct rhashtable_params params = { 0 };
1116                 void *ret;
1117
1118                 ret = rhashtable_lookup_get_insert_fast(NULL, NULL, params);
1119         ])
1120 ])
1121 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
1122         AC_MSG_CHECKING([if 'rhashtable_lookup_get_insert_fast' exist])
1123         LB2_LINUX_TEST_RESULT([rhashtable_lookup_get_insert_fast], [
1124                 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP_GET_INSERT_FAST, 1,
1125                         [rhashtable_lookup_get_insert_fast() is available])
1126         ])
1127 ]) # LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
1128
1129 #
1130 # Kernel version 4.12-rc2 8f553c498e1772cccb39a114da4a498d22992758
1131 # provide proper CPU hotplug locking
1132 #
1133 AC_DEFUN([LIBCFS_SRC_CPUS_READ_LOCK], [
1134         LB2_LINUX_TEST_SRC([cpu_read_lock], [
1135                 #include <linux/cpu.h>
1136         ],[
1137                 cpus_read_lock();
1138                 cpus_read_unlock();
1139         ])
1140 ])
1141 AC_DEFUN([LIBCFS_CPUS_READ_LOCK], [
1142         AC_MSG_CHECKING([if 'cpus_read_[un]lock' exist])
1143         LB2_LINUX_TEST_RESULT([cpu_read_lock], [
1144                 AC_DEFINE(HAVE_CPUS_READ_LOCK, 1, ['cpus_read_lock' exist])
1145         ])
1146 ]) # LIBCFS_CPUS_READ_LOCK
1147
1148 #
1149 # Kernel version 4.12-rc3 commit fd851a3cdc196bfc1d229b5f22369069af532bf8
1150 # introduce processor.h
1151 #
1152 AC_DEFUN([LIBCFS_HAVE_PROCESSOR_HEADER], [
1153 tmp_flags="$EXTRA_KCFLAGS"
1154 EXTRA_KCFLAGS="-Werror"
1155 LB_CHECK_LINUX_HEADER([linux/processor.h], [
1156         AC_DEFINE(HAVE_PROCESSOR_H, 1,
1157                 [processor.h is present])
1158 ])
1159 EXTRA_KCFLAGS="$tmp_flags"
1160 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
1161
1162 #
1163 # Kernel verison 4.12-rc6 commit 5dd43ce2f69d42a71dcacdb13d17d8c0ac1fe8f7
1164 # created wait_bit.h
1165 #
1166 AC_DEFUN([LIBCFS_HAVE_WAIT_BIT_HEADER], [
1167 LB_CHECK_LINUX_HEADER([linux/wait_bit.h], [
1168         AC_DEFINE(HAVE_WAIT_BIT_HEADER_H, 1,
1169                 [wait_bit.h is present])])
1170 ]) # LIBCFS_HAVE_WAIT_BIT_HEADER
1171
1172 #
1173 # Kernel version 4.12-rc6 commmit 2055da97389a605c8a00d163d40903afbe413921
1174 # changed:
1175 #       struct wait_queue_head::task_list       => ::head
1176 #       struct wait_queue_entry::task_list      => ::entry
1177 #
1178 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME], [
1179         LB2_LINUX_TEST_SRC([wait_queue_task_list], [
1180                 #include <linux/wait.h>
1181         ],[
1182                 wait_queue_head_t e;
1183
1184                 INIT_LIST_HEAD(&e.head);
1185         ])
1186 ])
1187 AC_DEFUN([LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME], [
1188         AC_MSG_CHECKING([if linux wait_queue_head list_head is named head])
1189         LB2_LINUX_TEST_RESULT([wait_queue_task_list], [
1190                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_LIST, 1,
1191                         [linux wait_queue_head_t list_head is name head])
1192         ])
1193 ]) # LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
1194
1195 #
1196 # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1197 #
1198 # Kernel version v4.12-rc6-23-g76c85ddc4695
1199 # sched/wait: Standardize wait_bit_queue naming
1200 #
1201 # renamed struct wait_bit_queue  => wait_bit_queue_entry
1202 #
1203 AC_DEFUN([LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1204         LB2_LINUX_TEST_SRC([struct_wait_bit_queue_entry_exists], [
1205                 #include <linux/wait.h>
1206                 #if HAVE_WAIT_BIT_HEADER_H
1207                         #include <linux/wait_bit.h>
1208                 #endif
1209         ],[
1210                 struct wait_bit_queue_entry entry;
1211                 memset(&entry, 0, sizeof(entry));
1212         ])
1213 ])
1214 AC_DEFUN([LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1215         AC_MSG_CHECKING([if struct wait_bit_queue_entry exists])
1216         LB2_LINUX_TEST_RESULT([struct_wait_bit_queue_entry_exists], [
1217                 AC_DEFINE(HAVE_WAIT_BIT_QUEUE_ENTRY, 1,
1218                         [if struct wait_bit_queue_entry exists])
1219         ])
1220 ]) # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1221
1222 #
1223 # LIBCFS_NLA_STRDUP
1224 #
1225 # Kernel version 4.13-rc1 commit 2cf0c8b3e6942ecafe6ebb1a6d0328a81641bf39
1226 # created nla_strdup(). This is needed since push strings can be
1227 # any size.
1228 #
1229 AC_DEFUN([LIBCFS_SRC_NLA_STRDUP], [
1230         LB2_LINUX_TEST_SRC([nla_strdup], [
1231                 #include <net/netlink.h>
1232         ],[
1233                 char *tmp = nla_strdup(NULL, GFP_KERNEL);
1234                 (void)tmp;
1235         ],[])
1236 ])
1237 AC_DEFUN([LIBCFS_NLA_STRDUP], [
1238         AC_MSG_CHECKING([if 'nla_strdup()' exists])
1239         LB2_LINUX_TEST_RESULT([nla_strdup], [
1240                 AC_DEFINE(HAVE_NLA_STRDUP, 1,
1241                         ['nla_strdup' is available])
1242         ])
1243 ]) # LIBCFS_NLA_STRDUP
1244
1245 #
1246 # LIBCFS_WAIT_QUEUE_ENTRY
1247 #
1248 # Kernel version 4.13 ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f
1249 # Rename wait_queue_t => wait_queue_entry_t
1250 #
1251 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_ENTRY], [
1252         LB2_LINUX_TEST_SRC([wait_queue_entry], [
1253                 #include <linux/wait.h>
1254         ],[
1255                 wait_queue_entry_t e;
1256
1257                 e.flags = 0;
1258         ])
1259 ])
1260 AC_DEFUN([LIBCFS_WAIT_QUEUE_ENTRY], [
1261         AC_MSG_CHECKING([if 'wait_queue_entry_t' exists])
1262         LB2_LINUX_TEST_RESULT([wait_queue_entry], [
1263                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY, 1,
1264                         ['wait_queue_entry_t' is available])
1265         ])
1266 ]) # LIBCFS_WAIT_QUEUE_ENTRY
1267
1268 #
1269 # LIBCFS_NEW_KERNEL_WRITE
1270 #
1271 # Kernel version 4.14 e13ec939e96b13e664bb6cee361cc976a0ee621a
1272 # changed kernel_write prototype to make is plug compatible
1273 # with the unexported vfs_write()
1274 #
1275 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_WRITE], [
1276         LB2_LINUX_TEST_SRC([kernel_write_match], [
1277                 #include <linux/fs.h>
1278         ],[
1279                 const void *buf = NULL;
1280                 loff_t pos = 0;
1281                 return kernel_write(NULL, buf, 0, &pos);
1282         ],[-Werror])
1283 ])
1284 AC_DEFUN([LIBCFS_NEW_KERNEL_WRITE], [
1285         AC_MSG_CHECKING([if 'kernel_write' matches other read/write helpers])
1286         LB2_LINUX_TEST_RESULT([kernel_write_match], [
1287                 AC_DEFINE(HAVE_NEW_KERNEL_WRITE, 1,
1288                         ['kernel_write' aligns with read/write helpers])
1289         ])
1290 ]) # LIBCFS_NEW_KERNEL_WRITE
1291
1292 #
1293 # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1294 #
1295 # kernel 5.0 commit ca79b0c211af63fa3276f0e3fd7dd9ada2439839
1296 # mm: convert totalram_pages and totalhigh_pages variables to atomic
1297 #
1298 AC_DEFUN([LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC], [
1299         LB2_LINUX_TEST_SRC([totalram_pages], [
1300                 #include <linux/mm.h>
1301         ],[
1302                 totalram_pages_inc();
1303         ],[-Werror])
1304 ])
1305 AC_DEFUN([LIBCFS_MM_TOTALRAM_PAGES_FUNC], [
1306         AC_MSG_CHECKING([if totalram_pages is a function])
1307         LB2_LINUX_TEST_RESULT([totalram_pages], [
1308                 AC_DEFINE(HAVE_TOTALRAM_PAGES_AS_FUNC, 1,
1309                         [if totalram_pages is a function])
1310         ])
1311 ]) # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1312
1313 #
1314 # LIBCFS_NEW_KERNEL_READ
1315 #
1316 # 4.14 commit bdd1d2d3d251c65b74ac4493e08db18971c09240 changed
1317 # the signature of kernel_read to match other read/write helpers
1318 # and place offset last.
1319 #
1320 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_READ], [
1321         LB2_LINUX_TEST_SRC([kernel_read], [
1322                 #include <linux/fs.h>
1323         ],[
1324                 loff_t pos = 0;
1325                 kernel_read(NULL, NULL, 0, &pos);
1326         ],[-Werror])
1327 ])
1328 AC_DEFUN([LIBCFS_NEW_KERNEL_READ], [
1329         AC_MSG_CHECKING([if 'kernel_read()' has loff_t *pos as last parameter])
1330         LB2_LINUX_TEST_RESULT([kernel_read], [
1331                 AC_DEFINE(HAVE_KERNEL_READ_LAST_POSP, 1,
1332                         [kernel_read() signature ends with loff_t *pos])
1333         ])
1334 ]) # LIBCFS_NEW_KERNEL_READ
1335
1336 #
1337 # LIBCFS_DEFINE_TIMER
1338 #
1339 # Kernel version 4.14 commit 1d27e3e2252ba9d949ca82fbdb73cde102cb2067
1340 # remove expires and data arguments from DEFINE_TIMER. Also the callback
1341 # when from using unsigned long argument to using struct timer_list pointer.
1342 #
1343 AC_DEFUN([LIBCFS_SRC_DEFINE_TIMER], [
1344         LB2_LINUX_TEST_SRC([define_timer], [
1345                 #include <linux/timer.h>
1346         ],[
1347                 static DEFINE_TIMER(my_timer, NULL);
1348         ])
1349 ])
1350 AC_DEFUN([LIBCFS_DEFINE_TIMER], [
1351         AC_MSG_CHECKING([if DEFINE_TIMER takes only 2 arguments])
1352         LB2_LINUX_TEST_RESULT([define_timer], [
1353                 AC_DEFINE(HAVE_NEW_DEFINE_TIMER, 1,
1354                         [DEFINE_TIMER uses only 2 arguements])
1355         ])
1356 ]) # LIBCFS_DEFINE_TIMER
1357
1358 #
1359 # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1360 #
1361 # Kernel 2.6.27 commit 8594698ebddeef5443b7da8258ae33b3eaca61d5
1362 # exported save_stack_trace_tsk for x86.
1363 # Kernel 2.6.27 commit 01f4b8b8b8db09b88be7df7e51192e4e678b69d3
1364 # exported save_stack_trace_tsk for powerpc
1365 # Kernel 4.13 commit e27c7fa015d61c8be6a2c32b2144aad2ae6ec975
1366 # exported save_stack_trace_tsk for arm64
1367 # Kernel 4.14 commit 9a3dc3186fc3795e076a4122da9e0258651a9631
1368 # exported save_stack_trace_tsk for arm
1369 #
1370 AC_DEFUN([LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK], [
1371 LB_CHECK_EXPORT([save_stack_trace_tsk], [arch/$SUBARCH/kernel/stacktrace.c],
1372         [AC_DEFINE(HAVE_SAVE_STACK_TRACE_TSK, 1,
1373                 [save_stack_trace_tsk is exported])])
1374 ]) # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1375
1376 #
1377 # LIBCFS_LOCKDEP_IS_HELD
1378 #
1379 # Kernel v4.15-rc8-106-g08f36ff64234
1380 # lockdep: Make lockdep checking constant
1381 #
1382 AC_DEFUN([LIBCFS_SRC_LOCKDEP_IS_HELD], [
1383         LB2_LINUX_TEST_SRC([lockdep_is_held], [
1384                 #include <linux/lockdep.h>
1385         ],[
1386         #ifdef CONFIG_LOCKDEP
1387                 const struct spinlock *lock = NULL;
1388
1389                 lockdep_is_held(lock);
1390         #endif
1391         ],[-Werror])
1392 ])
1393 AC_DEFUN([LIBCFS_LOCKDEP_IS_HELD], [
1394         AC_MSG_CHECKING([if 'lockdep_is_held()' uses const argument])
1395         LB2_LINUX_TEST_RESULT([lockdep_is_held], [],[
1396                 AC_DEFINE(NEED_LOCKDEP_IS_HELD_DISCARD_CONST, 1,
1397                         [lockdep_is_held() argument is const])
1398         ])
1399 ]) # LIBCFS_LOCKDEP_IS_HELD
1400
1401 #
1402 # LIBCFS_BITMAP_TO_ARR32
1403 #
1404 # Kernel commit v4.15-10794-gc724f19 introduced
1405 # bitmap_{from,to}_arr32, which are handy functions, to move
1406 # data back and forth between a bitmap and a u32 array
1407 #
1408 AC_DEFUN([LIBCFS_SRC_BITMAP_TO_ARR32], [
1409         LB2_LINUX_TEST_SRC([bitmap_to_arr32], [
1410                 #include <linux/bitmap.h>
1411         ],[
1412                 bitmap_to_arr32(NULL, NULL, 0);
1413         ],[-Werror])
1414 ])
1415 AC_DEFUN([LIBCFS_BITMAP_TO_ARR32], [
1416         AC_MSG_CHECKING([if 'bitmap_to_arr32()' exist])
1417         LB2_LINUX_TEST_RESULT([bitmap_to_arr32], [
1418                 AC_DEFINE(HAVE_BITMAP_TO_ARR32, 1,
1419                         [bitmap_to_arr32() exist])
1420         ])
1421 ]) # LIBCFS_BITMAP_TO_ARR32
1422
1423 #
1424 # LIBCFS_TIMER_SETUP
1425 #
1426 # Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
1427 # setup_timer() was replaced by timer_setup(), where the callback
1428 # argument is the structure already holding the struct timer_list.
1429 #
1430 AC_DEFUN([LIBCFS_SRC_TIMER_SETUP], [
1431         LB2_LINUX_TEST_SRC([timer_setup], [
1432                 #include <linux/timer.h>
1433         ],[
1434                 timer_setup(NULL, NULL, 0);
1435         ])
1436 ])
1437 AC_DEFUN([LIBCFS_TIMER_SETUP], [
1438         AC_MSG_CHECKING([if setup_timer has been replaced with timer_setup])
1439         LB2_LINUX_TEST_RESULT([timer_setup], [
1440                 AC_DEFINE(HAVE_TIMER_SETUP, 1,
1441                         [timer_setup has replaced setup_timer])
1442         ])
1443 ]) # LIBCFS_TIMER_SETUP
1444
1445 #
1446 # LIBCFS_WAIT_VAR_EVENT
1447 #
1448 # Kernel version 4.16-rc4 commit 6b2bb7265f0b62605e8caee3613449ed0db270b9
1449 # added wait_var_event()
1450 #
1451 AC_DEFUN([LIBCFS_SRC_WAIT_VAR_EVENT], [
1452         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1453                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1454         else
1455                 WAIT_BIT_H=""
1456         fi
1457         LB2_LINUX_TEST_SRC([wait_var_event], [
1458                 #ifdef HAVE_WAIT_BIT_HEADER_H
1459                 #include <linux/wait_bit.h>
1460                 #endif
1461                 #include <linux/wait.h>
1462         ],[
1463                 wake_up_var(NULL);
1464         ],[${WAIT_BIT_H}])
1465 ])
1466 AC_DEFUN([LIBCFS_WAIT_VAR_EVENT], [
1467         AC_MSG_CHECKING([if 'wait_var_event' exist])
1468         LB2_LINUX_TEST_RESULT([wait_var_event], [
1469                 AC_DEFINE(HAVE_WAIT_VAR_EVENT, 1,
1470                         ['wait_var_event' is available])
1471         ])
1472 ]) # LIBCFS_WAIT_VAR_EVENT
1473
1474 #
1475 # LIBCFS_BITMAP_ALLOC
1476 #
1477 # Kernel version 4.17 commit c42b65e363ce97a828f81b59033c3558f8fa7f70
1478 # added bitmap memory allocation handling.
1479 #
1480 AC_DEFUN([LIBCFS_SRC_BITMAP_ALLOC], [
1481         LB2_LINUX_TEST_SRC([bitmap_alloc], [
1482                 #include <linux/bitmap.h>
1483         ],[
1484                 unsigned long *map = bitmap_alloc(1, GFP_KERNEL);
1485                 (void)map;
1486         ])
1487 ])
1488 AC_DEFUN([LIBCFS_BITMAP_ALLOC], [
1489         AC_MSG_CHECKING([if Linux bitmap memory management exist])
1490         LB2_LINUX_TEST_RESULT([bitmap_alloc], [
1491                 AC_DEFINE(HAVE_BITMAP_ALLOC, 1,
1492                         [Linux bitmap can be allocated])
1493         ])
1494 ]) # LIBCFS_BITMAP_ALLOC
1495
1496 #
1497 # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1498 #
1499 # Kernel version 4.17-rc2 commit 8236b0ae31c837d2b3a2565c5f8d77f637e824cc
1500 # added clear_and_wake_up_bit()
1501 #
1502 AC_DEFUN([LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT], [
1503         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1504                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1505         else
1506                 WAIT_BIT_H=""
1507         fi
1508         LB2_LINUX_TEST_SRC([clear_and_wake_up_bit], [
1509                 #ifdef HAVE_WAIT_BIT_HEADER_H
1510                 #include <linux/wait_bit.h>
1511                 #endif
1512                 #include <linux/wait.h>
1513         ],[
1514                 clear_and_wake_up_bit(0, NULL);
1515         ],[${WAIT_BIT_H}])
1516 ])
1517 AC_DEFUN([LIBCFS_CLEAR_AND_WAKE_UP_BIT], [
1518         AC_MSG_CHECKING([if 'clear_and_wake_up_bit' exist])
1519         LB2_LINUX_TEST_RESULT([clear_and_wake_up_bit], [
1520                 AC_DEFINE(HAVE_CLEAR_AND_WAKE_UP_BIT, 1,
1521                         ['clear_and_wake_up_bit' is available])
1522         ])
1523 ]) # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1524
1525 #
1526 # LIBCFS_TCP_SOCK_SET_NODELAY
1527 #
1528 # kernel 4.18.0-293.el8
1529 # tcp_sock_set_nodelay() was added
1530 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_NODELAY], [
1531         LB2_LINUX_TEST_SRC([tcp_sock_set_nodelay_exists], [
1532                 #include <linux/tcp.h>
1533         ],[
1534                 tcp_sock_set_nodelay(NULL);
1535         ],[-Werror])
1536 ])
1537 AC_DEFUN([LIBCFS_TCP_SOCK_SET_NODELAY], [
1538         AC_MSG_CHECKING([if 'tcp_sock_set_nodelay()' exists])
1539         LB2_LINUX_TEST_RESULT([tcp_sock_set_nodelay_exists], [
1540                 AC_DEFINE(HAVE_TCP_SOCK_SET_NODELAY, 1,
1541                         ['tcp_sock_set_nodelay()' exists])
1542         ])
1543 ]) # LIBCFS_TCP_SOCK_SET_NODELAY
1544
1545 #
1546 # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1547 #
1548 # kernel 4.18.0-293.el8
1549 # tcp_sock_set_keepidle() was added
1550 #
1551 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE], [
1552         LB2_LINUX_TEST_SRC([tcp_sock_set_keepidle_exists], [
1553                 #include <linux/tcp.h>
1554         ],[
1555                 tcp_sock_set_keepidle(NULL, 0);
1556         ],[-Werror])
1557 ])
1558 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPIDLE], [
1559         AC_MSG_CHECKING([if 'tcp_sock_set_keepidle()' exists])
1560         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepidle_exists], [
1561                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPIDLE, 1,
1562                         ['tcp_sock_set_keepidle()' exists])
1563         ])
1564 ]) # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1565
1566 #
1567 # LIBCFS_TCP_SOCK_SET_QUICKACK
1568 # kernel v5.7-rc6-2504-gddd061b8daed
1569 #   tcp: add tcp_sock_set_quickack
1570 #
1571 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_QUICKACK], [
1572         LB2_LINUX_TEST_SRC([tcp_sock_set_quickack_exists], [
1573                 #include <linux/tcp.h>
1574         ],[
1575                 tcp_sock_set_quickack(NULL, 0);
1576         ],[-Werror])
1577 ])
1578 AC_DEFUN([LIBCFS_TCP_SOCK_SET_QUICKACK], [
1579         AC_MSG_CHECKING([if 'tcp_sock_set_quickack()' exists])
1580         LB2_LINUX_TEST_RESULT([tcp_sock_set_quickack_exists], [
1581                 AC_DEFINE(HAVE_TCP_SOCK_SET_QUICKACK, 1,
1582                         ['tcp_sock_set_quickack()' exists])
1583         ])
1584 ]) # LIBCFS_TCP_SOCK_SET_QUICKACK
1585
1586 #
1587 # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1588 # v5.7-rc6-2508-gd41ecaac903c
1589 # tcp: add tcp_sock_set_keepintvl
1590 #
1591 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL], [
1592         LB2_LINUX_TEST_SRC([tcp_sock_set_keepintvl_exists], [
1593                 #include <linux/tcp.h>
1594         ],[
1595                 tcp_sock_set_keepintvl(NULL, 0);
1596         ],[-Werror])
1597 ])
1598 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPINTVL], [
1599         AC_MSG_CHECKING([if 'tcp_sock_set_keepintvl()' exists])
1600         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepintvl_exists], [
1601                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPINTVL, 1,
1602                         ['tcp_sock_set_keepintvl()' exists])
1603         ])
1604 ]) # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1605
1606 #
1607 # LIBCFS_TCP_SOCK_SET_KEEPCNT
1608 # v5.7-rc6-2509-g480aeb9639d6
1609 # tcp: add tcp_sock_set_keepcnt
1610 #
1611 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT], [
1612         LB2_LINUX_TEST_SRC([tcp_sock_set_keepcnt_exists], [
1613                 #include <linux/tcp.h>
1614         ],[
1615                 tcp_sock_set_keepcnt(NULL, 0);
1616         ],[-Werror])
1617 ])
1618 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPCNT], [
1619         AC_MSG_CHECKING([if 'tcp_sock_set_keepcnt()' exists])
1620         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepcnt_exists], [
1621                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPCNT, 1,
1622                         ['tcp_sock_set_keepcnt()' exists])
1623         ])
1624 ]) # LIBCFS_TCP_SOCK_SET_KEEPCNT
1625
1626 #
1627 # LIBCFS_XARRAY_SUPPORT
1628 #
1629 # 4.19-rc5 kernel commit 3159f943aafdbacb2f94c38fdaadabf2bbde2a14
1630 # replaced the radix tree implementation with Xarrays. This change
1631 # introduced functionaly needed for general Xarray support
1632 #
1633 AC_DEFUN([LIBCFS_SRC_XARRAY_SUPPORT], [
1634         LB2_LINUX_TEST_SRC([xarray_support], [
1635                 #include <linux/xarray.h>
1636         ],[
1637                 xa_is_value(NULL);
1638         ],[-Werror])
1639 ])
1640 AC_DEFUN([LIBCFS_XARRAY_SUPPORT], [
1641         AC_MSG_CHECKING([if page cache uses Xarray])
1642         LB2_LINUX_TEST_RESULT([xarray_support], [
1643                 AC_DEFINE(HAVE_XARRAY_SUPPORT, 1,
1644                         [kernel Xarray implementation lacks 'xa_is_value'])
1645         ])
1646 ]) # LIBCFS_XARRAY_SUPPORT
1647
1648 #
1649 # LIBCFS_NL_DUMP_EXT_ACK
1650 #
1651 # Kernel version 4.19-rc6 commit 4a19edb60d0203cd5bf95a8b46ea8f63fd41194c
1652 # added extended ACK handling to Netlink dump handlers
1653 #
1654 AC_DEFUN([LIBCFS_SRC_NL_DUMP_EXT_ACK], [
1655         LB2_LINUX_TEST_SRC([netlink_dump_ext_ack], [
1656                 #include <net/netlink.h>
1657         ],[
1658                 struct netlink_callback *cb = NULL;
1659                 cb->extack = NULL;
1660         ],[])
1661 ])
1662 AC_DEFUN([LIBCFS_NL_DUMP_EXT_ACK], [
1663         AC_MSG_CHECKING([if Netlink dump handlers support ext_ack])
1664         LB2_LINUX_TEST_RESULT([netlink_dump_ext_ack], [
1665                 AC_DEFINE(HAVE_NL_DUMP_WITH_EXT_ACK, 1,
1666                         [netlink_ext_ack is handled for Netlink dump handlers])
1667         ])
1668 ]) # LIBCFS_NL_DUMP_EXT_ACK
1669
1670 #
1671 # LIBCFS_HAVE_IOV_ITER_TYPE
1672 #
1673 # kernel 4.20 commit 00e23707442a75b404392cef1405ab4fd498de6b
1674 # iov_iter: Use accessor functions to access an iterator's type and direction.
1675 #
1676 AC_DEFUN([LIBCFS_SRC_HAVE_IOV_ITER_TYPE], [
1677         LB2_LINUX_TEST_SRC([macro_iov_iter_type_exists], [
1678                 #include <linux/uio.h>
1679         ],[
1680                 struct iov_iter iter = { };
1681                 enum iter_type type = iov_iter_type(&iter);
1682                 (void)type;
1683         ],[-Werror])
1684 ])
1685 AC_DEFUN([LIBCFS_HAVE_IOV_ITER_TYPE], [
1686         AC_MSG_CHECKING([if iov_iter_type exists])
1687         LB2_LINUX_TEST_RESULT([macro_iov_iter_type_exists], [
1688                 AC_DEFINE(HAVE_IOV_ITER_TYPE, 1,
1689                         [if iov_iter_type exists])
1690         ])
1691 ]) # LIBCFS_HAVE_IOV_ITER_TYPE
1692
1693 #
1694 # LIBCFS_GENRADIX
1695 #
1696 # Kernel 5.0 commit ba20ba2e3743bac786dff777954c11930256075e
1697 # implemented generic radix trees to handle very large memory
1698 # allocation that can be used instead of vmalloc which has
1699 # a performance penalty.
1700 #
1701 AC_DEFUN([LIBCFS_GENRADIX], [
1702 LB_CHECK_EXPORT([__genradix_ptr], [lib/generic-radix-tree.c],
1703         [AC_DEFINE(HAVE_GENRADIX_SUPPORT, 1,
1704                 [generic-radix-tree is present])])
1705 ]) # LIBCFS_GENRADIX
1706
1707 #
1708 # LIBCFS_GET_REQUEST_KEY_AUTH
1709 #
1710 # kernel 5.0 commit 822ad64d7e46a8e2c8b8a796738d7b657cbb146d
1711 # keys: Fix dependency loop between construction record and auth key
1712 #
1713 # Added <keys/request_key_auth-type.h> and get_request_key_auth()
1714 # which was propagated to stable
1715 #
1716 AC_DEFUN([LIBCFS_SRC_GET_REQUEST_KEY_AUTH], [
1717         LB2_LINUX_TEST_SRC([get_request_key_auth_exported], [
1718                 #include <linux/key.h>
1719                 #include <linux/keyctl.h>
1720                 #include <keys/request_key_auth-type.h>
1721         ],[
1722                 struct key *ring;
1723                 const struct key *key = NULL;
1724                 struct request_key_auth *rka = get_request_key_auth(key);
1725
1726                 ring = key_get(rka->dest_keyring);
1727         ],[-Werror])
1728 ])
1729 AC_DEFUN([LIBCFS_GET_REQUEST_KEY_AUTH], [
1730         AC_MSG_CHECKING([if get_request_key_auth() is available])
1731         LB2_LINUX_TEST_RESULT([get_request_key_auth_exported], [
1732                 AC_DEFINE(HAVE_GET_REQUEST_KEY_AUTH, 1,
1733                         [get_request_key_auth() is available])
1734         ])
1735 ]) # LIBCFS_GET_REQUEST_KEY_AUTH
1736
1737 #
1738 # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1739 #
1740 # Linux commit v5.1-rc3-29-gaa30f47cf666
1741 #    kobject: Add support for default attribute groups to kobj_type
1742 # Linux commit v5.18-rc1-2-gcdb4f26a63c3
1743 #    kobject: kobj_type: remove default_attrs
1744 #
1745 AC_DEFUN([LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS],[
1746         LB2_LINUX_TEST_SRC([kobj_type_default_groups], [
1747                 #include <linux/kobject.h>
1748         ],[
1749                 struct kobj_type *kobj_type = NULL;
1750                 void *has = kobj_type->default_groups;
1751                 (void) has;
1752         ])
1753 ])
1754 AC_DEFUN([LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS],[
1755         AC_MSG_CHECKING([does struct kobj_type have 'default_groups' member])
1756         LB2_LINUX_TEST_RESULT([kobj_type_default_groups], [
1757                 AC_DEFINE(HAVE_KOBJ_TYPE_DEFAULT_GROUPS, 1,
1758                         [struct kobj_type has 'default_groups' member])
1759         ])
1760 ]) # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1761
1762 #
1763 # LIBCFS_LOOKUP_USER_KEY
1764 #
1765 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1766 # signal: Remove task parameter from force_sig
1767 #
1768 AC_DEFUN([LIBCFS_SRC_LOOKUP_USER_KEY], [
1769         LB2_LINUX_TEST_SRC([lookup_user_key_exported], [
1770                 #include <linux/key.h>
1771                 #include <linux/keyctl.h>
1772         ],[
1773                 lookup_user_key(KEY_SPEC_USER_KEYRING, 0, 0);
1774         ],[-Werror])
1775 ])
1776 AC_DEFUN([LIBCFS_LOOKUP_USER_KEY], [
1777         AC_MSG_CHECKING([if lookup_user_key() is available])
1778         LB2_LINUX_TEST_RESULT([lookup_user_key_exported], [
1779                 AC_DEFINE(HAVE_LOOKUP_USER_KEY, 1,
1780                         [lookup_user_key() is available])
1781         ])
1782 ]) # LIBCFS_LOOKUP_USER_KEY
1783
1784 #
1785 # LIBCFS_FORCE_SIG_WITH_TASK
1786 #
1787 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1788 # signal: Remove task parameter from force_sig
1789 #
1790 AC_DEFUN([LIBCFS_SRC_FORCE_SIG_WITH_TASK], [
1791         LB2_LINUX_TEST_SRC([force_sig_with_task], [
1792                 #include <linux/sched/signal.h>
1793         ],[
1794                 force_sig(SIGINT, NULL);
1795         ],[-Werror])
1796 ])
1797 AC_DEFUN([LIBCFS_FORCE_SIG_WITH_TASK], [
1798         AC_MSG_CHECKING([if force_sig has task parameter])
1799         LB2_LINUX_TEST_RESULT([force_sig_with_task], [
1800                 AC_DEFINE(HAVE_FORCE_SIG_WITH_TASK, 1,
1801                         [force_sig() has task parameter])
1802         ])
1803 ]) # LIBCFS_FORCE_SIG_WITH_TASK
1804
1805 #
1806 # LIBCFS_CACHE_DETAIL_WRITERS
1807 #
1808 # kernel v5.3-rc2-1-g64a38e840ce5
1809 # SUNRPC: Track writers of the 'channel' file to improve cache_listeners_exist
1810 #
1811 AC_DEFUN([LIBCFS_SRC_CACHE_DETAIL_WRITERS], [
1812         LB2_LINUX_TEST_SRC([cache_detail_writers_atomic], [
1813                 #include <linux/sunrpc/cache.h>
1814
1815                 static struct cache_detail rsi_cache;
1816         ],[
1817                 atomic_set(&rsi_cache.writers, 0);
1818         ],[-Werror])
1819 ])
1820 AC_DEFUN([LIBCFS_CACHE_DETAIL_WRITERS], [
1821         AC_MSG_CHECKING([if struct cache_detail has writers])
1822         LB2_LINUX_TEST_RESULT([cache_detail_writers_atomic], [
1823                 AC_DEFINE(HAVE_CACHE_DETAIL_WRITERS, 1,
1824                         [struct cache_detail has writers])
1825         ])
1826 ]) # LIBCFS_CACHE_DETAIL_WRITERS
1827
1828 #
1829 # LIBCFS_GENL_DUMPIT_INFO
1830 #
1831 # kernel v5.4-rc1 commit bf813b0afeae2f012f0e527a526c1b78ca21ad82
1832 # expanded struct genl_dumpit_info to include struct genl_family.
1833 #
1834 AC_DEFUN([LIBCFS_SRC_GENL_DUMPIT_INFO], [
1835         LB2_LINUX_TEST_SRC([genl_dumpit_info], [
1836                 #include <net/genetlink.h>
1837         ],[
1838                 static struct genl_dumpit_info info;
1839
1840                 info.family = NULL;
1841         ],[-Werror])
1842 ])
1843 AC_DEFUN([LIBCFS_GENL_DUMPIT_INFO], [
1844         AC_MSG_CHECKING([if struct genl_dumpit_info has family field])
1845         LB2_LINUX_TEST_RESULT([genl_dumpit_info], [
1846                 AC_DEFINE(HAVE_GENL_DUMPIT_INFO, 1,
1847                         [struct genl_dumpit_info has family field])
1848         ])
1849 ]) # LIBCFS_GENL_DUMPIT_INFO
1850
1851 #
1852 # LIBCFS_KALLSYMS_LOOKUP
1853 #
1854 # kernel v5.6-11591-g0bd476e6c671
1855 # kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()
1856 AC_DEFUN([LIBCFS_KALLSYMS_LOOKUP], [
1857 LB_CHECK_EXPORT([kallsyms_lookup_name], [kernel/kallsyms.c],
1858         [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1859                 [kallsyms_lookup_name is exported by kernel])])
1860 ]) # LIBCFS_KALLSYMS_LOOKUP
1861
1862 #
1863 # v5.5-8862-gd56c0d45f0e2
1864 # proc: decouple proc from VFS with "struct proc_ops"
1865 #
1866 AC_DEFUN([LIBCFS_SRC_HAVE_PROC_OPS], [
1867         LB2_LINUX_TEST_SRC([proc_ops], [
1868                 #include <linux/proc_fs.h>
1869
1870                 static struct proc_ops *my_proc;
1871         ],[
1872                 my_proc->proc_lseek = NULL;
1873         ],[-Werror])
1874 ]) # LIBCFS_SRC_HAVE_PROC_OPS
1875 AC_DEFUN([LIBCFS_HAVE_PROC_OPS], [
1876         AC_MSG_CHECKING([if struct proc_ops exists])
1877         LB2_LINUX_TEST_RESULT([proc_ops], [
1878                 AC_DEFINE(HAVE_PROC_OPS, 1,
1879                         [struct proc_ops exists])
1880         ])
1881 ]) # LIBCFS_HAVE_PROC_OPS
1882
1883 #
1884 # LIBCFS_IP6_SET_PREF
1885 #
1886 # kernel v5.8-rc1~165^2~71^2~3 commit 18d5ad62327576cbb1e5b9938a59d63ac0c15832
1887 # ipv6: add ip6_sock_set_addr_preferences
1888 #
1889 AC_DEFUN([LIBCFS_SRC_IP6_SET_PREF], [
1890         LB2_LINUX_TEST_SRC([ip6_set_pref_test], [
1891                 #include <net/ipv6.h>
1892         ],[
1893                 ip6_sock_set_addr_preferences(NULL, 0);
1894         ],[-Werror])
1895 ])
1896 AC_DEFUN([LIBCFS_IP6_SET_PREF], [
1897         AC_MSG_CHECKING([if ip6_sock_set_addr_preferences() exists])
1898         LB2_LINUX_TEST_RESULT([ip6_set_pref_test], [
1899                 AC_DEFINE(HAVE_IP6_SET_PREF, 1,
1900                         [if ip6_sock_set_addr_preferences exists])
1901         ])
1902 ]) # LIBCFS_IP6_SET_PREF
1903
1904 #
1905 # LIBCFS_VMALLOC_2ARGS
1906 #
1907 # kernel v5.8-rc1~201^2~19
1908 # mm: remove the pgprot argument to __vmalloc
1909 AC_DEFUN([LIBCFS_SRC_VMALLOC_2ARGS], [
1910         LB2_LINUX_TEST_SRC([vmalloc_2args], [
1911                 #include <linux/vmalloc.h>
1912         ],[
1913                 __vmalloc(0, 0);
1914         ],[])
1915 ])
1916 AC_DEFUN([LIBCFS_VMALLOC_2ARGS], [
1917         AC_MSG_CHECKING([if __vmalloc has 2 args])
1918         LB2_LINUX_TEST_RESULT([vmalloc_2args], [
1919                 AC_DEFINE(HAVE_VMALLOC_2ARGS, 1,
1920                         [__vmalloc only takes 2 args.])
1921         ])
1922 ]) # LIBCFS_VMALLOC_2ARGS
1923
1924 #
1925 # LIBCFS_HAVE_NR_UNSTABLE_NFS
1926 #
1927 # kernel v5.8-rc1~201^2~75
1928 # mm/writeback: discard NR_UNSTABLE_NFS, use NR_WRITEBACK instead
1929 #
1930 AC_DEFUN([LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS], [
1931         LB2_LINUX_TEST_SRC([nr_unstable_nfs_exists], [
1932                 #include <linux/mm.h>
1933
1934                 int i;
1935         ],[
1936                 i = NR_UNSTABLE_NFS;
1937         ],[-Werror])
1938 ])
1939 AC_DEFUN([LIBCFS_HAVE_NR_UNSTABLE_NFS], [
1940         AC_MSG_CHECKING([if NR_UNSTABLE_NFS still in use])
1941         LB2_LINUX_TEST_RESULT([nr_unstable_nfs_exists], [
1942                 AC_DEFINE(HAVE_NR_UNSTABLE_NFS, 1,
1943                         [NR_UNSTABLE_NFS is still in use.])
1944         ])
1945 ]) # LIBCFS_HAVE_NR_UNSTABLE_NFS
1946
1947 #
1948 # LIBCFS_HAVE_MMAP_LOCK
1949 #
1950 # kernel v5.8-rc1~83^2~24
1951 # mmap locking API: rename mmap_sem to mmap_lock
1952 #
1953 AC_DEFUN([LIBCFS_SRC_HAVE_MMAP_LOCK], [
1954         LB2_LINUX_TEST_SRC([mmap_write_lock], [
1955                 #include <linux/mm.h>
1956         ],[
1957                 mmap_write_lock(NULL);
1958         ],[])
1959 ])
1960 AC_DEFUN([LIBCFS_HAVE_MMAP_LOCK], [
1961         AC_MSG_CHECKING([if mmap_lock API is available])
1962         LB2_LINUX_TEST_RESULT([mmap_write_lock], [
1963                 AC_DEFINE(HAVE_MMAP_LOCK, 1,
1964                         [mmap_lock API is available.])
1965         ])
1966 ]) # LIBCFS_HAVE_MMAP_LOCK
1967
1968 #
1969 # LIBCFS_KERNEL_SETSOCKOPT
1970 #
1971 # kernel v5.8-rc1~165^2~59^2
1972 # net: remove kernel_setsockopt
1973 AC_DEFUN([LIBCFS_SRC_KERNEL_SETSOCKOPT], [
1974         LB2_LINUX_TEST_SRC([kernel_setsockopt_exists], [
1975                 #include <linux/net.h>
1976         ],[
1977                 kernel_setsockopt(NULL, 0, 0, NULL, 0);
1978         ],[-Werror])
1979 ])
1980 AC_DEFUN([LIBCFS_KERNEL_SETSOCKOPT], [
1981         AC_MSG_CHECKING([if kernel_setsockopt still in use])
1982         LB2_LINUX_TEST_RESULT([kernel_setsockopt_exists], [
1983         AC_DEFINE(HAVE_KERNEL_SETSOCKOPT, 1,
1984                 [kernel_setsockopt still in use])
1985         ])
1986 ]) # LIBCFS_KERNEL_SETSOCKOPT
1987
1988 #
1989 # LIBCFS_KEY_NEED_UNLINK
1990 #
1991 # kernel 5.8 commit 8c0637e950d68933a67f7438f779d79b049b5e5c
1992 # keys: Make the KEY_NEED_* perms an enum rather than a mask
1993 #
1994 AC_DEFUN([LIBCFS_SRC_KEY_NEED_UNLINK], [
1995         LB2_LINUX_TEST_SRC([key_need_unlink_exists], [
1996                 #include <linux/key.h>
1997                 #include <linux/keyctl.h>
1998         ],[
1999                 lookup_user_key(0, 0, KEY_NEED_UNLINK);
2000         ],[-Werror])
2001 ])
2002 AC_DEFUN([LIBCFS_KEY_NEED_UNLINK], [
2003         AC_MSG_CHECKING([if KEY_NEED_UNLINK exists])
2004         LB2_LINUX_TEST_RESULT([key_need_unlink_exists], [
2005                 AC_DEFINE(HAVE_KEY_NEED_UNLINK, 1,
2006                         [KEY_NEED_UNLINK exists])
2007         ])
2008 ]) # LIBCFS_KEY_NEED_UNLINK
2009
2010 #
2011 # LIBCFS_SEC_RELEASE_SECCTX
2012 #
2013 # kernel linux-hwe-5.8 (5.8.0-22.23~20.04.1)
2014 # LSM: Use lsmcontext in security_release_secctx
2015 AC_DEFUN([LIBCFS_SRC_SEC_RELEASE_SECCTX], [
2016         LB2_LINUX_TEST_SRC([security_release_secctx_1arg], [
2017                 #include <linux/security.h>
2018         ],[
2019                 security_release_secctx(NULL);
2020         ],[])
2021 ])
2022 AC_DEFUN([LIBCFS_SEC_RELEASE_SECCTX], [
2023         AC_MSG_CHECKING([if security_release_secctx has 1 arg])
2024         LB2_LINUX_TEST_RESULT([security_release_secctx_1arg], [
2025                 AC_DEFINE(HAVE_SEC_RELEASE_SECCTX_1ARG, 1,
2026                         [security_release_secctx has 1 arg.])
2027         ])
2028 ]) # LIBCFS_SEC_RELEASE_SECCTX
2029
2030 #
2031 # LIBCFS_HAVE_KFREE_SENSITIVE
2032 #
2033 # kernel v5.10-rc1~3
2034 # mm: remove kzfree() compatibility definition
2035 #
2036 AC_DEFUN([LIBCFS_SRC_HAVE_KFREE_SENSITIVE], [
2037         LB2_LINUX_TEST_SRC([kfree_sensitive_exists], [
2038                 #include <linux/slab.h>
2039         ],[
2040                 kfree_sensitive(NULL);
2041         ], [-Werror])
2042 ])
2043 AC_DEFUN([LIBCFS_HAVE_KFREE_SENSITIVE], [
2044         AC_MSG_CHECKING([if kfree_sensitive() is available])
2045         LB2_LINUX_TEST_RESULT([kfree_sensitive_exists], [
2046                 AC_DEFINE(HAVE_KFREE_SENSITIVE, 1,
2047                         [kfree_sensitive() is available.])
2048         ])
2049 ]) # LIBCFS_HAVE_KFREE_SENSITIVE
2050
2051 #
2052 # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2053 #
2054 # Kernel v5.10-rc1-114-ga24d22b225ce
2055 # crypto: sha - split sha.h into sha1.h and sha2.h
2056 #
2057 AC_DEFUN([LIBCFS_HAVE_CRYPTO_SHA2_HEADER], [
2058 LB_CHECK_LINUX_HEADER([crypto/sha2.h], [
2059         AC_DEFINE(HAVE_CRYPTO_SHA2_HEADER, 1,
2060                 [crypto/sha2.h is present])])
2061 ]) # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2062
2063 #
2064 # LIBCFS_HAVE_LIST_CMP_FUNC_T
2065 #
2066 # kernel 5.10.70 commit 4f0f586bf0c898233d8f316f471a21db2abd522d
2067 # treewide: Change list_sort to use const pointers
2068 AC_DEFUN([LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T], [
2069         LB2_LINUX_TEST_SRC([list_cmp_func_t_exists], [
2070                 #include <linux/list_sort.h>
2071         ],[
2072                 list_cmp_func_t cmp;
2073                 (void)cmp;
2074         ], [-Werror])
2075 ])
2076 AC_DEFUN([LIBCFS_HAVE_LIST_CMP_FUNC_T], [
2077         AC_MSG_CHECKING([if list_cmp_func_t type is defined])
2078         LB2_LINUX_TEST_RESULT([list_cmp_func_t_exists], [
2079                 AC_DEFINE(HAVE_LIST_CMP_FUNC_T, 1,
2080                         [list_cmp_func_t type is defined])
2081         ])
2082 ]) # LIBCFS_HAVE_LIST_CMP_FUNC_T
2083
2084 #
2085 # LIBCFS_NLA_STRLCPY
2086 #
2087 # Kernel version 5.10-rc3 commit 872f690341948b502c93318f806d821c56772c42
2088 # replaced nla_strlcpy() with nla_strscpy().
2089 #
2090 AC_DEFUN([LIBCFS_SRC_NLA_STRLCPY], [
2091         LB2_LINUX_TEST_SRC([nla_strlcpy], [
2092                 #include <net/netlink.h>
2093         ],[
2094                 if (nla_strlcpy(NULL, NULL, 0) == 0)
2095                         return -EINVAL;
2096         ])
2097 ])
2098 AC_DEFUN([LIBCFS_NLA_STRLCPY], [
2099         AC_MSG_CHECKING([if 'nla_strlcpy()' still exists])
2100         LB2_LINUX_TEST_RESULT([nla_strlcpy], [
2101                 AC_DEFINE(HAVE_NLA_STRLCPY, 1,
2102                         ['nla_strlcpy' is available])
2103         ])
2104 ]) # LIBCFS_NLA_STRLCPY
2105
2106 #
2107 # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2108 #
2109 # Linux v5.11-11104-ga28a6e860c6c
2110 #  string.h: move fortified functions definitions in a dedicated header.
2111 #
2112 AC_DEFUN([LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER],[
2113         LB2_LINUX_TEST_SRC([linux_fortify_string_header], [
2114                 #include <linux/fortify-string.h>
2115         ],[
2116         ],[])
2117 ])
2118 AC_DEFUN([LIBCFS_LINUX_FORTIFY_STRING_HEADER],[
2119         AC_MSG_CHECKING([Is linux/fortify-string.h header available])
2120         LB2_LINUX_TEST_RESULT([linux_fortify_string_header], [
2121                 AC_DEFINE(HAVE_LINUX_FORTIFY_STRING_HEADER, 1,
2122                         [linux/fortify-string.h header available])
2123         ])
2124 ]) # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2125
2126 #
2127 # LIBCFS_HAVE_CIPHER_HEADER
2128 #
2129 # Kernel 5.12 commit 0eb76ba29d16df2951d37c54ca279c4e5630b071
2130 # crypto: remove cipher routines from public crypto API
2131 #
2132 AC_DEFUN([LIBCFS_HAVE_CIPHER_HEADER], [
2133 tmp_flags="$EXTRA_KCFLAGS"
2134 EXTRA_KCFLAGS="-Werror"
2135 LB_CHECK_LINUX_HEADER([crypto/internal/cipher.h], [
2136         AC_DEFINE(HAVE_CIPHER_H, 1,
2137                 [crypto/internal/cipher.h is present])
2138 ])
2139 EXTRA_KCFLAGS="$tmp_flags"
2140 ]) # LIBCFS_HAVE_CIPHER_HEADER
2141
2142 #
2143 # LIBCFS_HAVE_TASK_RUNNING
2144 #
2145 # Kernel 5.13-rc6 commit b03fbd4ff24c5f075e58eb19261d5f8b3e40d
2146 # introduced task_is_running() macro.
2147 #
2148 AC_DEFUN([LIBCFS_SRC_HAVE_TASK_IS_RUNNING], [
2149         LB2_LINUX_TEST_SRC([task_is_running], [
2150                 #include <linux/sched.h>
2151         ],[
2152                 if (task_is_running(current))
2153                         schedule();
2154         ], [-Werror])
2155 ])
2156 AC_DEFUN([LIBCFS_HAVE_TASK_IS_RUNNING], [
2157         AC_MSG_CHECKING([if task_is_running() is defined])
2158         LB2_LINUX_TEST_RESULT([task_is_running], [
2159                 AC_DEFINE(HAVE_TASK_IS_RUNNING, 1,
2160                         [task_is_running() is defined])
2161         ])
2162 ]) # LIBCFS_HAVE_TASK_IS_RUNNING
2163
2164 #
2165 # LIBCFS_LINUX_STDARG_HEADER
2166 #
2167 # Kernel 5.14-rc5 commit c0891ac15f0428ffa81b2e818d416bdf3cb74ab6
2168 # isystem: ship and use stdarg.h
2169 #
2170 AC_DEFUN([LIBCFS_LINUX_STDARG_HEADER], [
2171 tmp_flags="$EXTRA_KCFLAGS"
2172 EXTRA_KCFLAGS="-Werror"
2173 LB_CHECK_LINUX_HEADER([linux/stdarg.h], [
2174         AC_DEFINE(HAVE_LINUX_STDARG_HEADER, 1, [linux/stdarg.h is present])
2175 ])
2176 EXTRA_KCFLAGS="$tmp_flags"
2177 ]) # LIBCFS_LINUX_STDARG_HEADER
2178
2179 #
2180 # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2181 #
2182 # Kernel 5.14 commit f39650de687e35766572ac89dbcd16a5911e2f0a
2183 # kernel.h: split out panic and oops helpers
2184 #
2185 AC_DEFUN([LIBCFS_HAVE_PANIC_NOTIFIER_HEADER], [
2186 tmp_flags="$EXTRA_KCFLAGS"
2187 EXTRA_KCFLAGS="-Werror"
2188 LB_CHECK_LINUX_HEADER([linux/panic_notifier.h], [
2189         AC_DEFINE(HAVE_PANIC_NOTIFIER_H, 1,
2190                 [linux/panic_notifier.h is present])
2191 ])
2192 EXTRA_KCFLAGS="$tmp_flags"
2193 ]) # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2194
2195 #
2196 # LIBCFS_PARAM_SET_UINT_MINMAX
2197 #
2198 # Kernel 5.15-rc1 commit 2a14c9ae15a38148484a128b84bff7e9ffd90d68
2199 # moved param_set_uint_minmax to common code
2200 #
2201 AC_DEFUN([LIBCFS_SRC_PARAM_SET_UINT_MINMAX],[
2202         LB2_LINUX_TEST_SRC([param_set_uint_minmax], [
2203                 #include <linux/moduleparam.h>
2204         ],[
2205                 param_set_uint_minmax(NULL, NULL, 0, 0);
2206         ], [])
2207 ])
2208 AC_DEFUN([LIBCFS_PARAM_SET_UINT_MINMAX],[
2209         AC_MSG_CHECKING([does function 'param_set_uint_minmax' exist])
2210         LB2_LINUX_TEST_RESULT([param_set_uint_minmax], [
2211                 AC_DEFINE(HAVE_PARAM_SET_UINT_MINMAX, 1,
2212                         ['param_set_uint_minmax' is available])
2213         ])
2214 ]) # LIBCFS_PARAM_SET_UINT_MINMAX
2215
2216 #
2217 # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2218 #
2219 # Kernel 5.15-rc6 commit fe45e630a1035aea94c29016f2598bbde149bbe3
2220 # block: move integrity handling out of <linux/blkdev.h>
2221 #
2222 AC_DEFUN([LIBCFS_LINUX_BLK_INTEGRITY_HEADER], [
2223 tmp_flags="$EXTRA_KCFLAGS"
2224 EXTRA_KCFLAGS="-Werror"
2225 LB_CHECK_LINUX_HEADER([linux/blk-integrity.h], [
2226         AC_DEFINE(HAVE_LINUX_BLK_INTEGRITY_HEADER, 1,
2227                 [linux/blk-integrity.h is present])
2228 ])
2229 EXTRA_KCFLAGS="$tmp_flags"
2230 ]) # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2231
2232 #
2233 # LIBCFS_PDE_DATA_EXISTS
2234 #
2235 # Linux commit v5.16-11573-g6dfbbae14a7b
2236 #    introduce pde_data()
2237 # Linux commit v5.16-11574-g359745d78351
2238 #    remove PDE_DATA()
2239 #
2240 AC_DEFUN([LIBCFS_SRC_PDE_DATA_EXISTS],[
2241         LB2_LINUX_TEST_SRC([pde_data], [
2242                 #include <linux/proc_fs.h>
2243         ],[
2244                 struct inode *inode = NULL;
2245                 void *data =pde_data(inode);
2246                 (void)data;
2247         ],[])
2248 ])
2249 AC_DEFUN([LIBCFS_PDE_DATA_EXISTS],[
2250         AC_MSG_CHECKING([does function 'pde_data' exist])
2251         LB2_LINUX_TEST_RESULT([pde_data], [
2252                 AC_DEFINE(HAVE_pde_data, 1, [function pde_data() available])
2253         ],[
2254                 AC_DEFINE(pde_data(inode), PDE_DATA(inode),
2255                           [function pde_data() unavailable])
2256         ])
2257 ]) # LIBCFS_PDE_DATA_EXISTS
2258
2259 #
2260 # LIBCFS_BIO_ALLOC_WITH_BDEV
2261 #
2262 # Linux commit v5.17-rc2-21-g07888c665b40
2263 #   block: pass a block_device and opf to bio_alloc
2264 #
2265 AC_DEFUN([LIBCFS_SRC_BIO_ALLOC_WITH_BDEV],[
2266         LB2_LINUX_TEST_SRC([bio_alloc_with_bdev], [
2267                 #include <linux/bio.h>
2268         ],[
2269                 struct block_device *bdev = NULL;
2270                 unsigned short nr_vecs = 1;
2271                 gfp_t gfp = GFP_KERNEL;
2272                 struct bio *bio = bio_alloc(bdev, nr_vecs, REQ_OP_WRITE, gfp);
2273                 (void) bio;
2274         ],[])
2275 ])
2276 AC_DEFUN([LIBCFS_BIO_ALLOC_WITH_BDEV],[
2277         AC_MSG_CHECKING([does bio_alloc() takes a struct block_device])
2278         LB2_LINUX_TEST_RESULT([bio_alloc_with_bdev], [
2279                 AC_DEFINE(HAVE_BIO_ALLOC_WITH_BDEV, 1,
2280                         [bio_alloc() takes a struct block_device])
2281         ])
2282 ]) # LIBCFS_BIO_ALLOC_WITH_BDEV
2283
2284 #
2285 # LIBCFS_TIMER_DELETE_SYNC
2286 #
2287 # Linux commit v6.1-rc1-7-g9a5a30568697
2288 #   timers: Get rid of del_singleshot_timer_sync()
2289 # Linux commit v6.1-rc1-11-g9b13df3fb64e
2290 #   timers: Rename del_timer_sync() to timer_delete_sync()
2291 #
2292 AC_DEFUN([LIBCFS_SRC_TIMER_DELETE_SYNC],[
2293         LB2_LINUX_TEST_SRC([timer_delete_sync], [
2294                 #include <linux/timer.h>
2295         ],[
2296                 struct timer_list *timer = NULL;
2297                 (void)timer_delete_sync(timer);
2298         ],[])
2299 ])
2300 AC_DEFUN([LIBCFS_TIMER_DELETE_SYNC],[
2301         AC_MSG_CHECKING([is timer_delete_sync() available])
2302         LB2_LINUX_TEST_RESULT([timer_delete_sync], [
2303                 AC_DEFINE(HAVE_TIMER_DELETE_SYNC, 1,
2304                         [timer_delete_sync() is available])
2305         ],[
2306                 AC_DEFINE(timer_delete_sync(t), del_timer_sync(t),
2307                         [timer_delete_sync() not is available])
2308         ])
2309 ]) # LIBCFS_TIMER_DELETE_SYNC
2310
2311 #
2312 # LIBCFS_TIMER_DELETE_SYNC
2313 #
2314 # Linux commit v6.1-rc1-12-gbb663f0f3c39
2315 #   timers: Rename del_timer() to timer_delete()
2316 #
2317 AC_DEFUN([LIBCFS_SRC_TIMER_DELETE],[
2318         LB2_LINUX_TEST_SRC([timer_delete], [
2319                 #include <linux/timer.h>
2320         ],[
2321                 struct timer_list *timer = NULL;
2322                 (void)timer_delete(timer);
2323         ],[])
2324 ])
2325 AC_DEFUN([LIBCFS_TIMER_DELETE],[
2326         AC_MSG_CHECKING([is timer_delete() available])
2327         LB2_LINUX_TEST_RESULT([timer_delete], [
2328                 AC_DEFINE(HAVE_TIMER_DELETE, 1,
2329                         [timer_delete() is available])
2330         ],[
2331                 AC_DEFINE(timer_delete(t), del_timer(t),
2332                         [timer_delete() not is available])
2333         ])
2334 ]) # LIBCFS_TIMER_DELETE
2335
2336 dnl #
2337 dnl # Generate and compile all of the kernel API test cases to determine
2338 dnl # which interfaces are available.  By invoking the kernel build system
2339 dnl # only once the compilation can be done in parallel significantly
2340 dnl # speeding up the process.
2341 dnl #
2342 AC_DEFUN([LIBCFS_PROG_LINUX_SRC], [
2343         # 3.11
2344         LIBCFS_SRC_KTIME_GET_TS64
2345         # 3.12
2346         LIBCFS_SRC_PREPARE_TO_WAIT_EVENT
2347         LIBCFS_SRC_KERNEL_PARAM_OPS
2348         LIBCFS_SRC_KTIME_ADD
2349         LIBCFS_SRC_KTIME_AFTER
2350         LIBCFS_SRC_KTIME_BEFORE
2351         LIBCFS_SRC_KTIME_COMPARE
2352         LIBCFS_SRC_SHRINKER_COUNT
2353         # 3.13
2354         LIBCFS_SRC_MATCH_WILDCARD
2355         # 3.14
2356         LIBCFS_SRC_HAVE_MAPPING_AS_EXITING_FLAG
2357         # 3.15
2358         LIBCFS_SRC_IOV_ITER_HAS_TYPE
2359         # 3.16
2360         LIBCFS_SRC_HAVE_GLOB
2361         # 3.17
2362         LIBCFS_SRC_HLIST_ADD_AFTER
2363         LIBCFS_SRC_TIMESPEC64
2364         LIBCFS_SRC_KTIME_GET_NS
2365         LIBCFS_SRC_KTIME_GET_REAL_TS64
2366         LIBCFS_SRC_KTIME_GET_REAL_SECONDS
2367         LIBCFS_SRC_KTIME_GET_REAL_NS
2368         LIBCFS_SRC_KTIME_TO_TIMESPEC64
2369         LIBCFS_SRC_TIMESPEC64_SUB
2370         LIBCFS_SRC_TIMESPEC64_TO_KTIME
2371         # 3.19
2372         LIBCFS_SRC_KTIME_GET_SECONDS
2373         LIBCFS_SRC_WAIT_WOKEN
2374         # 4.0
2375         LIBCFS_SRC_KTIME_MS_DELTA
2376         # 4.1
2377         LIBCFS_SRC_KERNEL_PARAM_LOCK
2378         # 4.2
2379         LIBCFS_SRC_STRSCPY_EXISTS
2380         LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK
2381         # 4.4
2382         LIBCFS_SRC_KSTRTOBOOL_FROM_USER
2383         LIBCFS_SRC_NETLINK_CALLBACK_START
2384         # 4.5
2385         LIBCFS_SRC_CRYPTO_HASH_HELPERS
2386         LIBCFS_SRC_RHASHTABLE_REPLACE
2387         # 4.6
2388         LIBCFS_SRC_BROKEN_HASH_64
2389         LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT
2390         LIBCFS_SRC_GET_USER_PAGES_6ARG
2391         # 4.7
2392         LIBCFS_SRC_RHASHTABLE_INSERT_FAST
2393         LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG
2394         # 4.8
2395         LIBCFS_SRC_RHASHTABLE_LOOKUP
2396         LIBCFS_SRC_RHLTABLE
2397         LIBCFS_SRC_STACKTRACE_OPS
2398         # 4.9
2399         LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS
2400         LIBCFS_SRC_RHASHTABLE_WALK_ENTER
2401         # 4.10
2402         LIBCFS_SRC_HOTPLUG_STATE_MACHINE
2403         # 4.11
2404         LIBCFS_SRC_NL_EXT_ACK
2405         LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2406         LIBCFS_SRC_KREF_READ
2407         LIBCFS_SRC_RHT_BUCKET_VAR
2408         # 4.12
2409         LIBCFS_SRC_CPUS_READ_LOCK
2410         LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME
2411         LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS
2412         LIBCFS_SRC_MEMALLOC_NORECLAIM
2413         # 4.13
2414         LIBCFS_SRC_NLA_STRDUP
2415         LIBCFS_SRC_WAIT_QUEUE_ENTRY
2416         # 4.14
2417         LIBCFS_SRC_DEFINE_TIMER
2418         LIBCFS_SRC_NEW_KERNEL_WRITE
2419         LIBCFS_SRC_NEW_KERNEL_READ
2420         # 4.15
2421         LIBCFS_SRC_LOCKDEP_IS_HELD
2422         LIBCFS_SRC_BITMAP_TO_ARR32
2423         LIBCFS_SRC_TIMER_SETUP
2424         # 4.16
2425         LIBCFS_SRC_HAVE_NS_TO_TIMESPEC64
2426         LIBCFS_SRC_WAIT_VAR_EVENT
2427         # 4.17
2428         LIBCFS_SRC_BITMAP_ALLOC
2429         LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT
2430         # 4.18
2431         LIBCFS_SRC_TCP_SOCK_SET_NODELAY
2432         LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE
2433         # 4.19
2434         LIBCFS_SRC_XARRAY_SUPPORT
2435         LIBCFS_SRC_NL_DUMP_EXT_ACK
2436         # 4.20
2437         LIBCFS_SRC_HAVE_IOV_ITER_TYPE
2438         # 5.0
2439         LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC
2440         LIBCFS_SRC_GET_REQUEST_KEY_AUTH
2441         # 5.2
2442         LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS
2443         # 5.3
2444         LIBCFS_SRC_LOOKUP_USER_KEY
2445         LIBCFS_SRC_FORCE_SIG_WITH_TASK
2446         LIBCFS_SRC_CACHE_DETAIL_WRITERS
2447         # 5.4
2448         LIBCFS_SRC_GENL_DUMPIT_INFO
2449         # 5.6
2450         LIBCFS_SRC_HAVE_PROC_OPS
2451         # 5.7
2452         LIBCFS_SRC_TCP_SOCK_SET_QUICKACK
2453         LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL
2454         LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT
2455         # 5.8
2456         LIBCFS_SRC_IP6_SET_PREF
2457         LIBCFS_SRC_VMALLOC_2ARGS
2458         LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS
2459         LIBCFS_SRC_HAVE_MMAP_LOCK
2460         LIBCFS_SRC_KERNEL_SETSOCKOPT
2461         LIBCFS_SRC_KEY_NEED_UNLINK
2462         LIBCFS_SRC_SEC_RELEASE_SECCTX
2463         # 5.10
2464         LIBCFS_SRC_HAVE_KFREE_SENSITIVE
2465         LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T
2466         LIBCFS_SRC_NLA_STRLCPY
2467         # 5.12
2468         LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER
2469         # 5.13
2470         LIBCFS_SRC_HAVE_TASK_IS_RUNNING
2471         # 5.15
2472         LIBCFS_SRC_PARAM_SET_UINT_MINMAX
2473         # 5.17
2474         LIBCFS_SRC_PDE_DATA_EXISTS
2475         LIBCFS_SRC_BIO_ALLOC_WITH_BDEV
2476         # 6.2
2477         LIBCFS_SRC_TIMER_DELETE_SYNC
2478         LIBCFS_SRC_TIMER_DELETE
2479
2480         LB2_LINUX_TEST_COMPILE_ALL([libcfs],
2481                 [for available kernel interfaces to libcfs])
2482 ])
2483
2484 dnl #
2485 dnl # Check results of kernel interface tests.
2486 dnl #
2487 AC_DEFUN([LIBCFS_PROG_LINUX_RESULTS], [
2488         # 3.11
2489         LIBCFS_KTIME_GET_TS64
2490         # 3.12
2491         LIBCFS_PREPARE_TO_WAIT_EVENT
2492         LIBCFS_KERNEL_PARAM_OPS
2493         LIBCFS_KTIME_ADD
2494         LIBCFS_KTIME_AFTER
2495         LIBCFS_KTIME_BEFORE
2496         LIBCFS_KTIME_COMPARE
2497         LIBCFS_SHRINKER_COUNT
2498         # 3.13
2499         LIBCFS_MATCH_WILDCARD
2500         # 3.14
2501         LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
2502         # 3.15
2503         LIBCFS_IOV_ITER_HAS_TYPE
2504         # 3.16
2505         LIBCFS_HAVE_GLOB
2506         # 3.17
2507         LIBCFS_HLIST_ADD_AFTER
2508         LIBCFS_TIMESPEC64
2509         LIBCFS_KTIME_GET_NS
2510         LIBCFS_KTIME_GET_REAL_TS64
2511         LIBCFS_KTIME_GET_REAL_SECONDS
2512         LIBCFS_KTIME_GET_REAL_NS
2513         LIBCFS_KTIME_TO_TIMESPEC64
2514         LIBCFS_TIMESPEC64_SUB
2515         LIBCFS_TIMESPEC64_TO_KTIME
2516         # 3.19
2517         LIBCFS_KTIME_GET_SECONDS
2518         LIBCFS_WAIT_WOKEN
2519         # 4.0
2520         LIBCFS_KTIME_MS_DELTA
2521         # 4.1
2522         LIBCFS_KERNEL_PARAM_LOCK
2523         # 4.2
2524         LIBCFS_STRSCPY_EXISTS
2525         LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
2526         # 4.4
2527         LIBCFS_KSTRTOBOOL_FROM_USER
2528         LIBCFS_NETLINK_CALLBACK_START
2529         # 4.5
2530         LIBCFS_CRYPTO_HASH_HELPERS
2531         LIBCFS_RHASHTABLE_REPLACE
2532         # 4.6
2533         LIBCFS_BROKEN_HASH_64
2534         LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
2535         LIBCFS_GET_USER_PAGES_6ARG
2536         # 4.7
2537         LIBCFS_RHASHTABLE_INSERT_FAST
2538         LIBCFS_RHASHTABLE_WALK_INIT_3ARG
2539         # 4.8
2540         LIBCFS_RHASHTABLE_LOOKUP
2541         LIBCFS_RHLTABLE
2542         LIBCFS_STACKTRACE_OPS
2543         # 4.9
2544         LIBCFS_GET_USER_PAGES_GUP_FLAGS
2545         LIBCFS_RHASHTABLE_WALK_ENTER
2546         # 4.10
2547         LIBCFS_HOTPLUG_STATE_MACHINE
2548         # 4.11
2549         LIBCFS_NL_EXT_ACK
2550         LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2551         LIBCFS_KREF_READ
2552         LIBCFS_RHT_BUCKET_VAR
2553         # 4.12
2554         LIBCFS_CPUS_READ_LOCK
2555         LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
2556         LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
2557         LIBCFS_MEMALLOC_NORECLAIM
2558         # 4.13
2559         LIBCFS_NLA_STRDUP
2560         LIBCFS_WAIT_QUEUE_ENTRY
2561         # 4.14
2562         LIBCFS_DEFINE_TIMER
2563         LIBCFS_NEW_KERNEL_WRITE
2564         LIBCFS_NEW_KERNEL_READ
2565         # 4.15
2566         LIBCFS_LOCKDEP_IS_HELD
2567         LIBCFS_BITMAP_TO_ARR32
2568         LIBCFS_TIMER_SETUP
2569         # 4.16
2570         LIBCFS_HAVE_NS_TO_TIMESPEC64
2571         LIBCFS_WAIT_VAR_EVENT
2572         # 4.17
2573         LIBCFS_BITMAP_ALLOC
2574         LIBCFS_CLEAR_AND_WAKE_UP_BIT
2575         # 4.18
2576         LIBCFS_TCP_SOCK_SET_NODELAY
2577         LIBCFS_TCP_SOCK_SET_KEEPIDLE
2578         # 4.19
2579         LIBCFS_XARRAY_SUPPORT
2580         LIBCFS_NL_DUMP_EXT_ACK
2581         # 4.20
2582         LIBCFS_HAVE_IOV_ITER_TYPE
2583         # 5.0
2584         LIBCFS_MM_TOTALRAM_PAGES_FUNC
2585         LIBCFS_GET_REQUEST_KEY_AUTH
2586         # 5.2
2587         LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
2588         # 5.3
2589         LIBCFS_LOOKUP_USER_KEY
2590         LIBCFS_FORCE_SIG_WITH_TASK
2591         LIBCFS_CACHE_DETAIL_WRITERS
2592         # 5.4
2593         LIBCFS_GENL_DUMPIT_INFO
2594         # 5.6
2595         LIBCFS_HAVE_PROC_OPS
2596         # 5.7
2597         LIBCFS_TCP_SOCK_SET_QUICKACK
2598         LIBCFS_TCP_SOCK_SET_KEEPINTVL
2599         LIBCFS_TCP_SOCK_SET_KEEPCNT
2600         # 5.8
2601         LIBCFS_IP6_SET_PREF
2602         LIBCFS_VMALLOC_2ARGS
2603         LIBCFS_HAVE_NR_UNSTABLE_NFS
2604         LIBCFS_HAVE_MMAP_LOCK
2605         LIBCFS_KERNEL_SETSOCKOPT
2606         LIBCFS_KEY_NEED_UNLINK
2607         LIBCFS_SEC_RELEASE_SECCTX
2608         # 5.10
2609         LIBCFS_HAVE_KFREE_SENSITIVE
2610         LIBCFS_HAVE_LIST_CMP_FUNC_T
2611         LIBCFS_NLA_STRLCPY
2612         # 5.12
2613         LIBCFS_LINUX_FORTIFY_STRING_HEADER
2614         # 5.13
2615         LIBCFS_HAVE_TASK_IS_RUNNING
2616         # 5.15
2617         LIBCFS_PARAM_SET_UINT_MINMAX
2618         # 5.17
2619         LIBCFS_PDE_DATA_EXISTS
2620         LIBCFS_BIO_ALLOC_WITH_BDEV
2621         # 6.2
2622         LIBCFS_TIMER_DELETE_SYNC
2623         LIBCFS_TIMER_DELETE
2624 ])
2625
2626 #
2627 # LIBCFS_PROG_LINUX
2628 #
2629 # LibCFS linux kernel checks
2630 #
2631 AC_DEFUN([LIBCFS_PROG_LINUX], [
2632 AC_MSG_NOTICE([LibCFS kernel checks
2633 ==============================================================================])
2634 LIBCFS_CONFIG_PANIC_DUMPLOG
2635
2636 # 4.6 - Header Check
2637 LIBCFS_STRINGHASH
2638 # 4.6 - Export Check
2639 LIBCFS_EXPORT_KSET_FIND_OBJ
2640 # 4.10 - Header Check
2641 LIBCFS_REFCOUNT_T
2642 # 4.11 - Header Check
2643 LIBCFS_SCHED_HEADERS
2644 # 4.13 - Header Checks
2645 LIBCFS_HAVE_PROCESSOR_HEADER
2646 LIBCFS_HAVE_WAIT_BIT_HEADER
2647 # 4.13 - Export Check
2648 LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
2649 # 5.0 - Header Check
2650 LIBCFS_GENRADIX
2651 # 5.7 - Export Check and Header Check
2652 LIBCFS_KALLSYMS_LOOKUP
2653 LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2654 # 5.12 - Header Check
2655 LIBCFS_HAVE_CIPHER_HEADER
2656 # 5.14 - Header Checks
2657 LIBCFS_LINUX_STDARG_HEADER
2658 LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2659 # 5.15 - Header Check
2660 LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2661 ]) # LIBCFS_PROG_LINUX
2662
2663 #
2664 # LIBCFS_PATH_DEFAULTS
2665 #
2666 # default paths for installed files
2667 #
2668 AC_DEFUN([LIBCFS_PATH_DEFAULTS], [
2669 ]) # LIBCFS_PATH_DEFAULTS
2670
2671 #
2672 # LIBCFS_CONFIGURE
2673 #
2674 # other configure checks
2675 #
2676 AC_DEFUN([LIBCFS_CONFIGURE], [
2677 AC_MSG_NOTICE([LibCFS core checks
2678 ==============================================================================])
2679
2680 # libcfs/libcfs/util/nidstrings.c
2681 AC_CHECK_HEADERS([netdb.h asm/types.h endian.h])
2682 AC_CHECK_FUNCS([gethostbyname])
2683 AC_CHECK_FUNCS([getaddrinfo])
2684
2685 # --------  Check for required packages  --------------
2686
2687 AC_MSG_NOTICE([LibCFS required packages checks
2688 ==============================================================================])
2689
2690 AC_MSG_CHECKING([whether to enable readline support])
2691 AC_ARG_ENABLE(readline,
2692         AS_HELP_STRING([--disable-readline],
2693                 [disable readline support]),
2694         [], [enable_readline="yes"])
2695 AC_MSG_RESULT([$enable_readline])
2696
2697 LIBREADLINE=""
2698 AS_IF([test "x$enable_readline" = xyes], [
2699         AC_CHECK_LIB([readline], [readline], [
2700                 LIBREADLINE="-lreadline"
2701                 AC_DEFINE(HAVE_LIBREADLINE, 1,
2702                         [readline library is available])
2703         ])
2704
2705         AC_SUBST(ENABLE_READLINE, yes)
2706 ], [
2707         AC_SUBST(ENABLE_READLINE, no)
2708 ])
2709 AC_SUBST(LIBREADLINE)
2710
2711 AC_MSG_CHECKING([whether to use libpthread for libcfs library])
2712 AC_ARG_ENABLE([libpthread],
2713         AS_HELP_STRING([--disable-libpthread],
2714                 [disable libpthread]),
2715         [], [enable_libpthread="yes"])
2716 AC_MSG_RESULT([$enable_libpthread])
2717
2718 PTHREAD_LIBS=""
2719 AS_IF([test "x$enable_libpthread" = xyes], [
2720         AC_CHECK_LIB([pthread], [pthread_create], [
2721                 PTHREAD_LIBS="-lpthread"
2722                 AC_DEFINE([HAVE_LIBPTHREAD], 1,
2723                         [use libpthread for libcfs library])
2724         ])
2725
2726         AC_SUBST(ENABLE_LIBPTHREAD, yes)
2727 ], [
2728         AC_SUBST(ENABLE_LIBPTHREAD, no)
2729         AC_MSG_WARN([Using libpthread for libcfs library is disabled explicitly])
2730 ])
2731 AC_SUBST(PTHREAD_LIBS)
2732 ]) # LIBCFS_CONFIGURE
2733
2734 #
2735 # LIBCFS_CONFIG_FILES
2736 #
2737 # files that should be generated with AC_OUTPUT
2738 #
2739 AC_DEFUN([LIBCFS_CONFIG_FILES], [
2740 AC_CONFIG_FILES([
2741 libcfs/Makefile
2742 libcfs/autoMakefile
2743 libcfs/autoconf/Makefile
2744 libcfs/include/Makefile
2745 libcfs/include/libcfs/Makefile
2746 libcfs/include/uapi/Makefile
2747 libcfs/include/libcfs/linux/Makefile
2748 libcfs/include/libcfs/util/Makefile
2749 libcfs/include/libcfs/crypto/Makefile
2750 libcfs/include/uapi/linux/Makefile
2751 libcfs/libcfs/Makefile
2752 libcfs/libcfs/autoMakefile
2753 libcfs/libcfs/linux/Makefile
2754 libcfs/libcfs/util/Makefile
2755 libcfs/libcfs/crypto/Makefile
2756 ])
2757 ]) # LIBCFS_CONFIG_FILES