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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_ts64' exist],
  82         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'prepare_to_wait_event' exist],
 100         [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         LB2_MSG_LINUX_TEST_RESULT([does 'struct kernel_param_ops' exist],
 122         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_add' exist],
 145         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_after' exist],
 166         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_before' exist],
 188         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_compare' exist],
 209         [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         LB2_MSG_LINUX_TEST_RESULT([shrinker has 'count_objects'],
 230         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'match_wildcard' exist],
 251         [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         LB2_MSG_LINUX_TEST_RESULT([if enum mapping_flags has AS_EXITING flag],
 274         [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         LB2_MSG_LINUX_TEST_RESULT([if iov_iter has member type],
 297         [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         LB2_MSG_LINUX_TEST_RESULT([does 'ns_to_timespec64()' exist],
 320         [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         LB2_MSG_LINUX_TEST_RESULT([does 'glob_match()' exist],
 341         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'hlist_add_after' exist],
 360         [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         LB2_MSG_LINUX_TEST_RESULT([does 'struct timespec64' exist],
 381         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_real_ts64' exist],
 401         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_real_ts64' exist],
 422         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_ns' exist],
 443         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_real_ns' exist],
 464         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_to_timespec64' exist],
 486         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'timespec64_sub' exist],
 506         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'timespec64_to_ktime' exist],
 527         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_seconds' exist],
 547         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'wait_woken' exist],
 566         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_ms_delta' exist],
 588         [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         LB2_MSG_LINUX_TEST_RESULT([does function 'kernel_param_[un]lock' exist],
 610         [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                 char buf[129];
 629
 630                 strscpy(buf, "something", sizeof(buf));
 631         ],[-Werror])
 632 ])
 633 AC_DEFUN([LIBCFS_STRSCPY_EXISTS], [
 634         LB2_MSG_LINUX_TEST_RESULT([if kernel strscpy is available],
 635         [strscpy_exists], [
 636                 AC_DEFINE(HAVE_STRSCPY, 1,
 637                         [kernel strscpy is available])
 638         ])
 639 ]) # LIBCFS_STRSCPY_EXISTS
 640
 641 #
 642 # Kernel version 4.2 changed topology_thread_cpumask
 643 # to topology_sibling_cpumask
 644 #
 645 AC_DEFUN([LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 646         LB2_LINUX_TEST_SRC([topology_sibling_cpumask], [
 647                 #include <linux/topology.h>
 648         ],[
 649                 const struct cpumask *mask;
 650
 651                 mask = topology_sibling_cpumask(0);
 652         ])
 653 ])
 654 AC_DEFUN([LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 655         LB2_MSG_LINUX_TEST_RESULT([does function 'topology_sibling_cpumask' exist],
 656         [topology_sibling_cpumask], [
 657                 AC_DEFINE(HAVE_TOPOLOGY_SIBLING_CPUMASK, 1,
 658                         [topology_sibling_cpumask is available])
 659         ])
 660 ]) # LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
 661
 662 #
 663 # Kernel version 4.4 commit ef951599074ba4fad2d0efa0a977129b41e6d203
 664 # introduced kstrtobool and kstrtobool_from_user.
 665 #
 666 AC_DEFUN([LIBCFS_SRC_KSTRTOBOOL_FROM_USER], [
 667         LB2_LINUX_TEST_SRC([kstrtobool_from_user], [
 668                 #include <linux/kernel.h>
 669         ],[
 670                 bool result;
 671                 return kstrtobool_from_user(NULL, 0, &result);
 672         ])
 673 ])
 674 AC_DEFUN([LIBCFS_KSTRTOBOOL_FROM_USER], [
 675         LB2_MSG_LINUX_TEST_RESULT([if Linux kernel has 'kstrtobool_from_user'],
 676         [kstrtobool_from_user], [
 677                 AC_DEFINE(HAVE_KSTRTOBOOL_FROM_USER, 1,
 678                         [kernel has kstrtobool_from_user])
 679         ])
 680 ]) # LIBCFS_KSTRTOBOOL_FROM_USER
 681
 682 #
 683 # LIBCFS_NETLINK_CALLBACK_START
 684 #
 685 # Kernel version 4.4-rc3 commit fc9e50f5a5a4e1fa9ba2756f745a13e693cf6a06
 686 # added a start function callback for struct netlink_callback
 687 #
 688 AC_DEFUN([LIBCFS_SRC_NETLINK_CALLBACK_START], [
 689         LB2_LINUX_TEST_SRC([cb_start], [
 690                 #include <net/genetlink.h>
 691         ],[
 692                 struct genl_ops ops;
 693
 694                 ops.start = NULL;
 695         ],[])
 696 ])
 697 AC_DEFUN([LIBCFS_NETLINK_CALLBACK_START], [
 698         LB2_MSG_LINUX_TEST_RESULT([if struct genl_ops has start callback],
 699         [cb_start], [
 700                 AC_DEFINE(HAVE_NETLINK_CALLBACK_START, 1,
 701                         [struct genl_ops has 'start' callback])
 702         ])
 703 ]) # LIBCFS_NETLINK_CALLBACK_START
 704
 705 #
 706 # Kernel version 4.5-rc1 commit d12481bc58fba89427565f8592e88446ec084a24
 707 # added crypto hash helpers
 708 #
 709 AC_DEFUN([LIBCFS_SRC_CRYPTO_HASH_HELPERS], [
 710         LB2_LINUX_TEST_SRC([crypto_hash_helpers], [
 711                 #include <crypto/hash.h>
 712         ],[
 713                 crypto_ahash_alg_name(NULL);
 714                 crypto_ahash_driver_name(NULL);
 715         ])
 716 ])
 717 AC_DEFUN([LIBCFS_CRYPTO_HASH_HELPERS], [
 718         LB2_MSG_LINUX_TEST_RESULT([does crypto hash helper functions exist],
 719         [crypto_hash_helpers], [
 720                 AC_DEFINE(HAVE_CRYPTO_HASH_HELPERS, 1,
 721                         [crypto hash helper functions are available])
 722         ])
 723 ]) # LIBCFS_CRYPTO_HASH_HELPERS
 724
 725 #
 726 # Kernel version 4.5-rc1 commit 3502cad73c4bbf8f6365d539e814159275252c59
 727 # introduced rhashtable_replace_fast
 728 #
 729 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_REPLACE], [
 730         LB2_LINUX_TEST_SRC([rhashtable_replace_fast], [
 731                 #include <linux/rhashtable.h>
 732         ],[
 733                 const struct rhashtable_params params = { 0 };
 734
 735                 rhashtable_replace_fast(NULL, NULL, NULL, params);
 736         ])
 737 ])
 738 AC_DEFUN([LIBCFS_RHASHTABLE_REPLACE], [
 739         LB2_MSG_LINUX_TEST_RESULT([if 'rhashtable_replace_fast' exists],
 740         [rhashtable_replace_fast], [
 741                 AC_DEFINE(HAVE_RHASHTABLE_REPLACE, 1,
 742                         [rhashtable_replace_fast() is available])
 743         ])
 744 ]) # LIBCFS_RHASHTABLE_REPLACE
 745
 746 #
 747 # Kernel version 4.5-rc3 commit 2fe829aca9d7bed5fd6b49c6a1452e5e486b6cc3dd
 748 # made kset_find_obj() exportable to modules
 749 #
 750 AC_DEFUN([LIBCFS_EXPORT_KSET_FIND_OBJ], [
 751 LB_CHECK_EXPORT([kset_find_obj], [lib/kobject.c],
 752         [AC_DEFINE(HAVE_KSET_FIND_OBJ, 1,
 753                 [kset_find_obj is exported by the kernel])])
 754 ]) # LIBCFS_EXPORT_KSET_FIND_OBJ
 755
 756 #
 757 # Kernel version 4.6+ commit ef703f49a6c5b909a85149bb6625c4ed0d697186
 758 # fixed the brokenness of hash_64(). The fix removed GOLDEN_RATIO_PRIME_64
 759 # since it was a poor prime value.
 760 #
 761 AC_DEFUN([LIBCFS_SRC_BROKEN_HASH_64], [
 762         LB2_LINUX_TEST_SRC([broken_hash_64], [
 763         #include <linux/hash.h>
 764         ],[
 765                 int tmp = GOLDEN_RATIO_PRIME_64;
 766         ])
 767 ])
 768 AC_DEFUN([LIBCFS_BROKEN_HASH_64], [
 769         LB2_MSG_LINUX_TEST_RESULT([kernel has fixed hash_64()],
 770         [broken_hash_64], [
 771                 AC_DEFINE(HAVE_BROKEN_HASH_64, 1, [kernel hash_64() is broken])
 772         ])
 773 ]) # LIBCFS_BROKEN_HASH_64
 774
 775 #
 776 # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 777 #
 778 # linux 4.6 kernel changed stacktrace_ops address to return an int
 779 #
 780 AC_DEFUN([LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 781         LB2_LINUX_TEST_SRC([stacktrace_ops_address_return_int], [
 782                 #include <asm/stacktrace.h>
 783         ],[
 784                 int rc;
 785
 786                 rc = ((struct stacktrace_ops *)0)->address(NULL, 0, 0);
 787         ])
 788 ])
 789 AC_DEFUN([LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 790         LB2_MSG_LINUX_TEST_RESULT([if 'struct stacktrace_ops' address function returns an int],
 791         [stacktrace_ops_address_return_int], [
 792                 AC_DEFINE(STACKTRACE_OPS_ADDRESS_RETURN_INT, 1,
 793                         ['struct stacktrace_ops' address function returns an int])
 794         ])
 795 ]) # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 796
 797 #
 798 # Kernel version 4.6 removed both struct task_struct and struct mm_struct
 799 # arguments to get_user_pages
 800 #
 801 AC_DEFUN([LIBCFS_SRC_GET_USER_PAGES_6ARG], [
 802         LB2_LINUX_TEST_SRC([get_user_pages_6arg], [
 803                 #include <linux/mm.h>
 804         ],[
 805                 int rc;
 806
 807                 rc = get_user_pages(0, 0, 0, 0, NULL, NULL);
 808         ])
 809 ])
 810 AC_DEFUN([LIBCFS_GET_USER_PAGES_6ARG], [
 811         LB2_MSG_LINUX_TEST_RESULT([if 'get_user_pages()' takes 6 arguments],
 812         [get_user_pages_6arg], [
 813                 AC_DEFINE(HAVE_GET_USER_PAGES_6ARG, 1,
 814                         [get_user_pages takes 6 arguments])
 815         ])
 816 ]) # LIBCFS_GET_USER_PAGES_6ARG
 817
 818 #
 819 # LIBCFS_STRINGHASH
 820 #
 821 # 4.6 kernel created stringhash.h which moved stuff out of dcache.h
 822 # commit f4bcbe792b8f434e32487cff9d9e30ab45a3ce02
 823 #
 824 AC_DEFUN([LIBCFS_SRC_STRINGHASH], [
 825         LB2_CHECK_LINUX_HEADER_SRC([linux/stringhash.h], [-Werror])
 826 ])
 827 AC_DEFUN([LIBCFS_STRINGHASH], [
 828         LB2_CHECK_LINUX_HEADER_RESULT([linux/stringhash.h], [
 829                 AC_DEFINE(HAVE_STRINGHASH, 1,
 830                         [stringhash.h is present])
 831         ])
 832 ]) # LIBCFS_STRINGHASH
 833
 834 #
 835 # LIBCFS_RHASHTABLE_INSERT_FAST
 836 #
 837 # 4.7+ kernel commit 5ca8cc5bf11faed257c762018aea9106d529232f
 838 # changed __rhashtable_insert_fast to support the new function
 839 # rhashtable_lookup_get_insert_key().
 840 #
 841 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_INSERT_FAST], [
 842         LB2_LINUX_TEST_SRC([rhashtable_insert_fast], [
 843                 #include <linux/rhashtable.h>
 844         ],[
 845                 const struct rhashtable_params params = { 0 };
 846                 int rc;
 847
 848                 rc = __rhashtable_insert_fast(NULL, NULL, NULL, params);
 849         ],
 850         [-Werror])
 851 ])
 852 AC_DEFUN([LIBCFS_RHASHTABLE_INSERT_FAST], [
 853         LB2_MSG_LINUX_TEST_RESULT([if internal '__rhashtable_insert_fast()' returns int],
 854         [rhashtable_insert_fast], [
 855                 AC_DEFINE(HAVE_HASHTABLE_INSERT_FAST_RETURN_INT, 1,
 856                           ['__rhashtable_insert_fast()' returns int])
 857         ])
 858 ]) # LIBCFS_RHASHTABLE_INSERT_FAST
 859
 860 #
 861 # LIBCFS_HAVE_NR_ZONE_WRITE_PENDING
 862 #
 863 # kernel v4.7-5966-g5a1c84b404a7
 864 # mm: remove reclaim and compaction retry approximations
 865 #
 866 AC_DEFUN([LIBCFS_SRC_HAVE_NR_ZONE_WRITE_PENDING], [
 867         LB2_LINUX_TEST_SRC([nr_zone_write_pending_exists], [
 868                 #include <linux/mmzone.h>
 869         ],[
 870                 enum zone_stat_item item = NR_ZONE_WRITE_PENDING;
 871                 (void)item;
 872         ],[-Werror])
 873 ])
 874 AC_DEFUN([LIBCFS_HAVE_NR_ZONE_WRITE_PENDING], [
 875         LB2_MSG_LINUX_TEST_RESULT([if NR_ZONE_WRITE_PENDING is available],
 876         [nr_zone_write_pending_exists], [
 877                 AC_DEFINE(HAVE_NR_ZONE_WRITE_PENDING, 1,
 878                         [NR_ZONE_WRITE_PENDING is still in use.])
 879         ])
 880 ]) # LIBCFS_HAVE_NR_ZONE_WRITE_PENDING
 881
 882 #
 883 # Kernel version 4.7-rc1 commit 8f6fd83c6c5ec66a4a70c728535ddcdfef4f3697
 884 # added 3rd arg to rhashtable_walk_init
 885 #
 886 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG], [
 887         LB2_LINUX_TEST_SRC([rhashtable_walk_init], [
 888                 #include <linux/gfp.h>
 889                 #include <linux/rhashtable.h>
 890         ],[
 891                 rhashtable_walk_init(NULL, NULL, GFP_KERNEL);
 892         ])
 893 ])
 894 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_INIT_3ARG], [
 895         LB2_MSG_LINUX_TEST_RESULT([if 'rhashtable_walk_init' has 3 args],
 896         [rhashtable_walk_init], [
 897                 AC_DEFINE(HAVE_3ARG_RHASHTABLE_WALK_INIT, 1,
 898                         [rhashtable_walk_init() has 3 args])
 899         ])
 900 ]) # LIBCFS_RHASHTABLE_WALK_INIT_3ARG
 901
 902 #
 903 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 904 # introduced rhashtable_lookup
 905 #
 906 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_LOOKUP], [
 907         LB2_LINUX_TEST_SRC([rhashtable_lookup], [
 908                 #include <linux/rhashtable.h>
 909         ],[
 910                 const struct rhashtable_params params = { 0 };
 911                 void *ret;
 912
 913                 ret = rhashtable_lookup(NULL, NULL, params);
 914         ])
 915 ])
 916 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP], [
 917         LB2_MSG_LINUX_TEST_RESULT([if 'rhashtable_lookup' exist],
 918         [rhashtable_lookup], [
 919                 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP, 1,
 920                         [rhashtable_lookup() is available])
 921         ])
 922 ]) # LIBCFS_RHASHTABLE_LOOKUP
 923
 924 #
 925 # LIBCFS_RHLTABLE
 926 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 927 # created the rhlist interface to allow inserting duplicate objects
 928 # into the same table.
 929 #
 930 AC_DEFUN([LIBCFS_SRC_RHLTABLE], [
 931         LB2_LINUX_TEST_SRC([rhtable], [
 932                 #include <linux/rhashtable.h>
 933         ],[
 934                 struct rhltable *hlt = NULL;
 935
 936                 rhltable_destroy(hlt);
 937         ])
 938 ])
 939 AC_DEFUN([LIBCFS_RHLTABLE], [
 940         LB2_MSG_LINUX_TEST_RESULT([does 'struct rhltable' exist],
 941         [rhtable], [
 942                 AC_DEFINE(HAVE_RHLTABLE, 1, [struct rhltable exist])
 943         ])
 944 ]) # LIBCFS_RHLTABLE
 945
 946 #
 947 # LIBCFS_STACKTRACE_OPS
 948 #
 949 # Kernel version 4.8 commit c8fe4609827aedc9c4b45de80e7cdc8ccfa8541b
 950 # removed both struct stacktrace_ops and dump_trace() function
 951 #
 952 AC_DEFUN([LIBCFS_SRC_STACKTRACE_OPS], [
 953         LB2_LINUX_TEST_SRC([stacktrace_ops], [
 954                 struct task_struct;
 955                 struct pt_regs;
 956                 #include <asm/stacktrace.h>
 957         ],[
 958                 struct stacktrace_ops ops;
 959                 ops.stack = NULL;
 960         ])
 961 ])
 962 AC_DEFUN([LIBCFS_STACKTRACE_OPS], [
 963 LB2_MSG_LINUX_TEST_RESULT([if 'struct stacktrace_ops' exists],
 964         [stacktrace_ops], [
 965                 AC_DEFINE(HAVE_STACKTRACE_OPS, 1,
 966                         [struct stacktrace_ops exists])
 967         ])
 968 ]) # LIBCFS_STACKTRACE_OPS
 969
 970 #
 971 # LIBCFS_RHASHTABLE_WALK_ENTER
 972 #
 973 # Kernel version 4.9-rc1 commit 246779dd090bd1b74d2652b3a6ca7759f593b27a
 974 # introduced rhashtable_walk_enter
 975 #
 976 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_WALK_ENTER], [
 977         LB2_LINUX_TEST_SRC([rhashtable_walk_enter], [
 978                 #include <linux/rhashtable.h>
 979         ],[
 980                 rhashtable_walk_enter(NULL, NULL);
 981         ])
 982 ])
 983 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_ENTER], [
 984         LB2_MSG_LINUX_TEST_RESULT([if 'rhashtable_walk_enter' exists],
 985         [rhashtable_walk_enter], [
 986                 AC_DEFINE(HAVE_RHASHTABLE_WALK_ENTER, 1,
 987                         [rhashtable_walk_enter() is available])
 988         ])
 989 ]) # LIBCFS_RHASHTABLE_WALK_ENTER
 990
 991 #
 992 # Kernel version 4.9 commit 768ae309a96103ed02eb1e111e838c87854d8b51
 993 # mm: replace get_user_pages() write/force parameters with gup_flags
 994 #
 995 AC_DEFUN([LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS], [
 996         LB2_LINUX_TEST_SRC([get_user_pages_gup_flags], [
 997                 #include <linux/mm.h>
 998         ],[
 999                 int rc;
1000                 rc = get_user_pages(0, 0, FOLL_WRITE, NULL, NULL);
1001         ])
1002 ])
1003 AC_DEFUN([LIBCFS_GET_USER_PAGES_GUP_FLAGS], [
1004         LB2_MSG_LINUX_TEST_RESULT([if 'get_user_pages()' takes gup_flags in arguments],
1005         [get_user_pages_gup_flags], [
1006                 AC_DEFINE(HAVE_GET_USER_PAGES_GUP_FLAGS, 1,
1007                         [get_user_pages takes gup_flags in arguments])
1008                 ])
1009 ]) # LIBCFS_GET_USER_PAGES_GUP_FLAGS
1010
1011 #
1012 # Kernel version 4.10 commit 7b737965b33188bd3dbb44e938535c4006d97fbb
1013 # libcfs: Convert to hotplug state machine
1014 #
1015 AC_DEFUN([LIBCFS_SRC_HOTPLUG_STATE_MACHINE], [
1016         LB2_LINUX_TEST_SRC([cpu_hotplug_state_machine], [
1017                 #include <linux/cpuhotplug.h>
1018         ],[
1019                 cpuhp_remove_state(CPUHP_LUSTRE_CFS_DEAD);
1020         ])
1021 ])
1022 AC_DEFUN([LIBCFS_HOTPLUG_STATE_MACHINE], [
1023         LB2_MSG_LINUX_TEST_RESULT([if libcfs supports CPU hotplug state machine],
1024         [cpu_hotplug_state_machine], [
1025                 AC_DEFINE(HAVE_HOTPLUG_STATE_MACHINE, 1,
1026                         [hotplug state machine is supported])
1027         ])
1028 ]) # LIBCFS_HOTPLUG_STATE_MACHINE
1029
1030 #
1031 # LIBCFS_REFCOUNT_T
1032 #
1033 # Kernel version 4.10-rc3 commit f405df5de3170c00e5c54f8b7cf4766044a032ba
1034 # introduced refcount_t which is atomic_t plus over flow guards.
1035 #
1036 AC_DEFUN([LIBCFS_SRC_REFCOUNT_T], [
1037         LB2_CHECK_LINUX_HEADER_SRC([linux/refcount.h], [-Werror])
1038 ])
1039 AC_DEFUN([LIBCFS_REFCOUNT_T], [
1040         LB2_CHECK_LINUX_HEADER_RESULT([linux/refcount.h], [
1041                 AC_DEFINE(HAVE_REFCOUNT_T, 1,
1042                         [refcount_t is supported])
1043         ])
1044 ]) # LIBCFS_REFCOUNT_T
1045
1046 #
1047 # Kernel version 4.12 commit 499118e966f1d2150bd66647c8932343c4e9a0b8
1048 # introduce memalloc_noreclaim_{save,restore}
1049 #
1050 AC_DEFUN([LIBCFS_SRC_MEMALLOC_NORECLAIM], [
1051         LB2_LINUX_TEST_SRC([memalloc_noreclaim], [
1052                 #include <linux/sched/mm.h>
1053         ],[
1054                 int flag = memalloc_noreclaim_save();
1055                 memalloc_noreclaim_restore(flag);
1056         ])
1057 ])
1058 AC_DEFUN([LIBCFS_MEMALLOC_NORECLAIM], [
1059         LB2_MSG_LINUX_TEST_RESULT([if memalloc_noreclaim_{save,restore} exist],
1060         [memalloc_noreclaim], [
1061                 AC_DEFINE(HAVE_MEMALLOC_RECLAIM, 1,
1062                         [memalloc_noreclaim_{save,restore}() is supported])
1063         ])
1064 ]) # LIBCFS_MEMALLOC_NORECLAIM
1065
1066 #
1067 # LIBCFS_SCHED_HEADERS
1068 #
1069 # 4.11 has broken up sched.h into more headers.
1070 #
1071 AC_DEFUN([LIBCFS_SRC_SCHED_HEADERS], [
1072         LB2_CHECK_LINUX_HEADER_SRC([linux/sched/signal.h], [-Werror])
1073 ])
1074 AC_DEFUN([LIBCFS_SCHED_HEADERS], [
1075         LB2_CHECK_LINUX_HEADER_RESULT([linux/sched/signal.h], [
1076                 AC_DEFINE(HAVE_SCHED_HEADERS, 1,
1077                         [linux/sched header directory exist])
1078         ])
1079 ]) # LIBCFS_SCHED_HEADERS
1080
1081 #
1082 # Kernel version 4.11-rc1 commit 2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e
1083 # introduce kref_read
1084 #
1085 AC_DEFUN([LIBCFS_SRC_KREF_READ], [
1086         LB2_LINUX_TEST_SRC([kref_read], [
1087                 #include <linux/kref.h>
1088         ],[
1089                 kref_read(NULL);
1090         ])
1091 ])
1092 AC_DEFUN([LIBCFS_KREF_READ], [
1093         LB2_MSG_LINUX_TEST_RESULT([if 'kref_read' exists],
1094         [kref_read], [
1095                 AC_DEFINE(HAVE_KREF_READ, 1, [kref_read() is available])
1096         ])
1097 ]) # LIBCFS_KREF_READ
1098
1099 #
1100 # Kernel version 4.11-rc1 commit da20420f83ea0fbcf3d03afda08d971ea1d8a356
1101 # introduced rht_bucket_var
1102 #
1103 AC_DEFUN([LIBCFS_SRC_RHT_BUCKET_VAR], [
1104         LB2_LINUX_TEST_SRC([rht_bucket_var], [
1105                 #include <linux/rhashtable.h>
1106         ],[
1107                 rht_bucket_var(NULL, 0);
1108         ])
1109 ])
1110 AC_DEFUN([LIBCFS_RHT_BUCKET_VAR], [
1111         LB2_MSG_LINUX_TEST_RESULT([if 'rht_bucket_var' exists],
1112         [rht_bucket_var], [
1113                 AC_DEFINE(HAVE_RHT_BUCKET_VAR, 1,
1114                         [rht_bucket_var() is available])
1115         ])
1116 ]) # LIBCFS_RHT_BUCKET_VAR
1117
1118 #
1119 # Kernel version 4.11-rc5 commit fceb6435e85298f747fee938415057af837f5a8a
1120 # began the enhanchement of Netlink with extended ACK struct for advanced
1121 # error handling. By commit 7ab606d1609dd6dfeae9c8ad0a8a4e051d831e46 we
1122 # had full support for this new feature.
1123 #
1124 AC_DEFUN([LIBCFS_SRC_NL_EXT_ACK], [
1125         LB2_LINUX_TEST_SRC([netlink_ext_ack], [
1126                 #include <net/genetlink.h>
1127         ],[
1128                 struct genl_info info;
1129
1130                 info.extack = NULL;
1131         ])
1132 ])
1133 AC_DEFUN([LIBCFS_NL_EXT_ACK], [
1134         LB2_MSG_LINUX_TEST_RESULT([if Netlink supports netlink_ext_ack],
1135         [netlink_ext_ack], [
1136                 AC_DEFINE(HAVE_NL_PARSE_WITH_EXT_ACK, 1,
1137                         [netlink_ext_ack is an argument to nla_parse type function])
1138         ])
1139 ]) # LIBCFS_NL_EXT_ACK
1140
1141 #
1142 # Kernel version 4.11 commit f9fe1c12d126f9887441fa5bb165046f30ddd4b5
1143 # introduced rhashtable_lookup_get_insert_fast
1144 #
1145 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
1146         LB2_LINUX_TEST_SRC([rhashtable_lookup_get_insert_fast], [
1147                 #include <linux/rhashtable.h>
1148         ],[
1149                 const struct rhashtable_params params = { 0 };
1150                 void *ret;
1151
1152                 ret = rhashtable_lookup_get_insert_fast(NULL, NULL, params);
1153         ])
1154 ])
1155 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
1156         LB2_MSG_LINUX_TEST_RESULT([if 'rhashtable_lookup_get_insert_fast' exist],
1157         [rhashtable_lookup_get_insert_fast], [
1158                 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP_GET_INSERT_FAST, 1,
1159                         [rhashtable_lookup_get_insert_fast() is available])
1160         ])
1161 ]) # LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
1162
1163 #
1164 # Kernel version 4.12-rc2 8f553c498e1772cccb39a114da4a498d22992758
1165 # provide proper CPU hotplug locking
1166 #
1167 AC_DEFUN([LIBCFS_SRC_CPUS_READ_LOCK], [
1168         LB2_LINUX_TEST_SRC([cpu_read_lock], [
1169                 #include <linux/cpu.h>
1170         ],[
1171                 cpus_read_lock();
1172                 cpus_read_unlock();
1173         ])
1174 ])
1175 AC_DEFUN([LIBCFS_CPUS_READ_LOCK], [
1176         LB2_MSG_LINUX_TEST_RESULT([if 'cpus_read_[un]lock' exist],
1177         [cpu_read_lock], [
1178                 AC_DEFINE(HAVE_CPUS_READ_LOCK, 1, ['cpus_read_lock' exist])
1179         ])
1180 ]) # LIBCFS_CPUS_READ_LOCK
1181
1182 #
1183 # LIBCFS_HAVE_PROCESSOR_HEADER
1184 #
1185 # Kernel version 4.12-rc3 commit fd851a3cdc196bfc1d229b5f22369069af532bf8
1186 # introduce processor.h
1187 #
1188 AC_DEFUN([LIBCFS_SRC_HAVE_PROCESSOR_HEADER], [
1189         LB2_CHECK_LINUX_HEADER_SRC([linux/processor.h], [-Werror])
1190 ])
1191 AC_DEFUN([LIBCFS_HAVE_PROCESSOR_HEADER], [
1192         LB2_CHECK_LINUX_HEADER_RESULT([linux/processor.h], [
1193                 AC_DEFINE(HAVE_PROCESSOR_H, 1,
1194                         [processor.h is present])
1195         ],[])
1196 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
1197
1198 #
1199 # LIBCFS_HAVE_WAIT_BIT_HEADER
1200 #
1201 # Kernel verison 4.12-rc6 commit 5dd43ce2f69d42a71dcacdb13d17d8c0ac1fe8f7
1202 # created wait_bit.h
1203 #
1204 AC_DEFUN([LIBCFS_SRC_HAVE_WAIT_BIT_HEADER], [
1205         LB2_CHECK_LINUX_HEADER_SRC([linux/wait_bit.h], [-Werror])
1206 ])
1207 AC_DEFUN([LIBCFS_HAVE_WAIT_BIT_HEADER], [
1208         LB2_CHECK_LINUX_HEADER_RESULT([linux/wait_bit.h], [
1209                 AC_DEFINE(HAVE_WAIT_BIT_HEADER_H, 1,
1210                         [wait_bit.h is present])
1211         ],[])
1212 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
1213
1214 #
1215 # Kernel version 4.12-rc6 commmit 2055da97389a605c8a00d163d40903afbe413921
1216 # changed:
1217 #       struct wait_queue_head::task_list       => ::head
1218 #       struct wait_queue_entry::task_list      => ::entry
1219 #
1220 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME], [
1221         LB2_LINUX_TEST_SRC([wait_queue_task_list], [
1222                 #include <linux/wait.h>
1223         ],[
1224                 wait_queue_head_t e;
1225
1226                 INIT_LIST_HEAD(&e.head);
1227         ])
1228 ])
1229 AC_DEFUN([LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME], [
1230         LB2_MSG_LINUX_TEST_RESULT([if linux wait_queue_head list_head is named head],
1231         [wait_queue_task_list], [
1232                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_LIST, 1,
1233                         [linux wait_queue_head_t list_head is name head])
1234         ])
1235 ]) # LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
1236
1237 #
1238 # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1239 #
1240 # Kernel version v4.12-rc6-23-g76c85ddc4695
1241 # sched/wait: Standardize wait_bit_queue naming
1242 #
1243 # renamed struct wait_bit_queue  => wait_bit_queue_entry
1244 #
1245 AC_DEFUN([LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1246         LB2_LINUX_TEST_SRC([struct_wait_bit_queue_entry_exists], [
1247                 #include <linux/wait.h>
1248                 #if HAVE_WAIT_BIT_HEADER_H
1249                         #include <linux/wait_bit.h>
1250                 #endif
1251         ],[
1252                 struct wait_bit_queue_entry entry;
1253                 memset(&entry, 0, sizeof(entry));
1254         ])
1255 ])
1256 AC_DEFUN([LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1257         LB2_MSG_LINUX_TEST_RESULT([if struct wait_bit_queue_entry exists],
1258         [struct_wait_bit_queue_entry_exists], [
1259                 AC_DEFINE(HAVE_WAIT_BIT_QUEUE_ENTRY, 1,
1260                         [if struct wait_bit_queue_entry exists])
1261         ])
1262 ]) # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1263
1264 #
1265 # LIBCFS_NLA_STRDUP
1266 #
1267 # Kernel version 4.13-rc1 commit 2cf0c8b3e6942ecafe6ebb1a6d0328a81641bf39
1268 # created nla_strdup(). This is needed since push strings can be
1269 # any size.
1270 #
1271 AC_DEFUN([LIBCFS_SRC_NLA_STRDUP], [
1272         LB2_LINUX_TEST_SRC([nla_strdup], [
1273                 #include <net/netlink.h>
1274         ],[
1275                 char *tmp = nla_strdup(NULL, GFP_KERNEL);
1276                 (void)tmp;
1277         ],[])
1278 ])
1279 AC_DEFUN([LIBCFS_NLA_STRDUP], [
1280         LB2_MSG_LINUX_TEST_RESULT([if 'nla_strdup()' exists],
1281         [nla_strdup], [
1282                 AC_DEFINE(HAVE_NLA_STRDUP, 1,
1283                         ['nla_strdup' is available])
1284         ])
1285 ]) # LIBCFS_NLA_STRDUP
1286
1287 #
1288 # LIBCFS_WAIT_QUEUE_ENTRY
1289 #
1290 # Kernel version 4.13 ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f
1291 # Rename wait_queue_t => wait_queue_entry_t
1292 #
1293 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_ENTRY], [
1294         LB2_LINUX_TEST_SRC([wait_queue_entry], [
1295                 #include <linux/wait.h>
1296         ],[
1297                 wait_queue_entry_t e;
1298
1299                 e.flags = 0;
1300         ])
1301 ])
1302 AC_DEFUN([LIBCFS_WAIT_QUEUE_ENTRY], [
1303         LB2_MSG_LINUX_TEST_RESULT([if 'wait_queue_entry_t' exists],
1304         [wait_queue_entry], [
1305                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY, 1,
1306                         ['wait_queue_entry_t' is available])
1307         ])
1308 ]) # LIBCFS_WAIT_QUEUE_ENTRY
1309
1310 #
1311 # LIBCFS_NEW_KERNEL_WRITE
1312 #
1313 # Kernel version 4.14 e13ec939e96b13e664bb6cee361cc976a0ee621a
1314 # changed kernel_write prototype to make is plug compatible
1315 # with the unexported vfs_write()
1316 #
1317 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_WRITE], [
1318         LB2_LINUX_TEST_SRC([kernel_write_match], [
1319                 #include <linux/fs.h>
1320         ],[
1321                 const void *buf = NULL;
1322                 loff_t pos = 0;
1323                 return kernel_write(NULL, buf, 0, &pos);
1324         ],[-Werror])
1325 ])
1326 AC_DEFUN([LIBCFS_NEW_KERNEL_WRITE], [
1327         LB2_MSG_LINUX_TEST_RESULT([if 'kernel_write' matches other read/write helpers],
1328         [kernel_write_match], [
1329                 AC_DEFINE(HAVE_NEW_KERNEL_WRITE, 1,
1330                         ['kernel_write' aligns with read/write helpers])
1331         ])
1332 ]) # LIBCFS_NEW_KERNEL_WRITE
1333
1334 #
1335 # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1336 #
1337 # kernel 5.0 commit ca79b0c211af63fa3276f0e3fd7dd9ada2439839
1338 # mm: convert totalram_pages and totalhigh_pages variables to atomic
1339 #
1340 AC_DEFUN([LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC], [
1341         LB2_LINUX_TEST_SRC([totalram_pages], [
1342                 #include <linux/mm.h>
1343         ],[
1344                 totalram_pages_inc();
1345         ],[-Werror])
1346 ])
1347 AC_DEFUN([LIBCFS_MM_TOTALRAM_PAGES_FUNC], [
1348         LB2_MSG_LINUX_TEST_RESULT([if totalram_pages is a function],
1349         [totalram_pages], [
1350                 AC_DEFINE(HAVE_TOTALRAM_PAGES_AS_FUNC, 1,
1351                         [if totalram_pages is a function])
1352         ])
1353 ]) # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1354
1355 #
1356 # LIBCFS_NEW_KERNEL_READ
1357 #
1358 # 4.14 commit bdd1d2d3d251c65b74ac4493e08db18971c09240 changed
1359 # the signature of kernel_read to match other read/write helpers
1360 # and place offset last.
1361 #
1362 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_READ], [
1363         LB2_LINUX_TEST_SRC([kernel_read], [
1364                 #include <linux/fs.h>
1365         ],[
1366                 loff_t pos = 0;
1367                 kernel_read(NULL, NULL, 0, &pos);
1368         ],[-Werror])
1369 ])
1370 AC_DEFUN([LIBCFS_NEW_KERNEL_READ], [
1371         LB2_MSG_LINUX_TEST_RESULT([if 'kernel_read()' has loff_t *pos as last parameter],
1372         [kernel_read], [
1373                 AC_DEFINE(HAVE_KERNEL_READ_LAST_POSP, 1,
1374                         [kernel_read() signature ends with loff_t *pos])
1375         ])
1376 ]) # LIBCFS_NEW_KERNEL_READ
1377
1378 #
1379 # LIBCFS_DEFINE_TIMER
1380 #
1381 # Kernel version 4.14 commit 1d27e3e2252ba9d949ca82fbdb73cde102cb2067
1382 # remove expires and data arguments from DEFINE_TIMER. Also the callback
1383 # when from using unsigned long argument to using struct timer_list pointer.
1384 #
1385 AC_DEFUN([LIBCFS_SRC_DEFINE_TIMER], [
1386         LB2_LINUX_TEST_SRC([define_timer], [
1387                 #include <linux/timer.h>
1388         ],[
1389                 static DEFINE_TIMER(my_timer, NULL);
1390         ])
1391 ])
1392 AC_DEFUN([LIBCFS_DEFINE_TIMER], [
1393         LB2_MSG_LINUX_TEST_RESULT([if DEFINE_TIMER takes only 2 arguments],
1394         [define_timer], [
1395                 AC_DEFINE(HAVE_NEW_DEFINE_TIMER, 1,
1396                         [DEFINE_TIMER uses only 2 arguements])
1397         ])
1398 ]) # LIBCFS_DEFINE_TIMER
1399
1400 #
1401 # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1402 #
1403 # Kernel 2.6.27 commit 8594698ebddeef5443b7da8258ae33b3eaca61d5
1404 # exported save_stack_trace_tsk for x86.
1405 # Kernel 2.6.27 commit 01f4b8b8b8db09b88be7df7e51192e4e678b69d3
1406 # exported save_stack_trace_tsk for powerpc
1407 # Kernel 4.13 commit e27c7fa015d61c8be6a2c32b2144aad2ae6ec975
1408 # exported save_stack_trace_tsk for arm64
1409 # Kernel 4.14 commit 9a3dc3186fc3795e076a4122da9e0258651a9631
1410 # exported save_stack_trace_tsk for arm
1411 #
1412 AC_DEFUN([LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK], [
1413 LB_CHECK_EXPORT([save_stack_trace_tsk], [arch/$SUBARCH/kernel/stacktrace.c],
1414         [AC_DEFINE(HAVE_SAVE_STACK_TRACE_TSK, 1,
1415                 [save_stack_trace_tsk is exported])])
1416 ]) # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1417
1418 #
1419 # LIBCFS_LOCKDEP_IS_HELD
1420 #
1421 # Kernel v4.15-rc8-106-g08f36ff64234
1422 # lockdep: Make lockdep checking constant
1423 #
1424 AC_DEFUN([LIBCFS_SRC_LOCKDEP_IS_HELD], [
1425         LB2_LINUX_TEST_SRC([lockdep_is_held], [
1426                 #include <linux/lockdep.h>
1427         ],[
1428         #ifdef CONFIG_LOCKDEP
1429                 const struct spinlock *lock = NULL;
1430
1431                 lockdep_is_held(lock);
1432         #endif
1433         ],[-Werror])
1434 ])
1435 AC_DEFUN([LIBCFS_LOCKDEP_IS_HELD], [
1436         LB2_MSG_LINUX_TEST_RESULT([if 'lockdep_is_held()' uses const argument],
1437         [lockdep_is_held], [
1438         ],[
1439                 AC_DEFINE(NEED_LOCKDEP_IS_HELD_DISCARD_CONST, 1,
1440                         [lockdep_is_held() argument is const])
1441         ])
1442 ]) # LIBCFS_LOCKDEP_IS_HELD
1443
1444 #
1445 # LIBCFS_BITMAP_TO_ARR32
1446 #
1447 # Kernel commit v4.15-10794-gc724f19 introduced
1448 # bitmap_{from,to}_arr32, which are handy functions, to move
1449 # data back and forth between a bitmap and a u32 array
1450 #
1451 AC_DEFUN([LIBCFS_SRC_BITMAP_TO_ARR32], [
1452         LB2_LINUX_TEST_SRC([bitmap_to_arr32], [
1453                 #include <linux/bitmap.h>
1454         ],[
1455                 bitmap_to_arr32(NULL, NULL, 0);
1456         ],[-Werror])
1457 ])
1458 AC_DEFUN([LIBCFS_BITMAP_TO_ARR32], [
1459         LB2_MSG_LINUX_TEST_RESULT([if 'bitmap_to_arr32()' exist],
1460         [bitmap_to_arr32], [
1461                 AC_DEFINE(HAVE_BITMAP_TO_ARR32, 1,
1462                         [bitmap_to_arr32() exist])
1463         ])
1464 ]) # LIBCFS_BITMAP_TO_ARR32
1465
1466 #
1467 # LIBCFS_TIMER_SETUP
1468 #
1469 # Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
1470 # setup_timer() was replaced by timer_setup(), where the callback
1471 # argument is the structure already holding the struct timer_list.
1472 #
1473 AC_DEFUN([LIBCFS_SRC_TIMER_SETUP], [
1474         LB2_LINUX_TEST_SRC([timer_setup], [
1475                 #include <linux/timer.h>
1476         ],[
1477                 timer_setup(NULL, NULL, 0);
1478         ])
1479 ])
1480 AC_DEFUN([LIBCFS_TIMER_SETUP], [
1481         LB2_MSG_LINUX_TEST_RESULT([if setup_timer has been replaced with timer_setup],
1482         [timer_setup], [
1483                 AC_DEFINE(HAVE_TIMER_SETUP, 1,
1484                         [timer_setup has replaced setup_timer])
1485         ])
1486 ]) # LIBCFS_TIMER_SETUP
1487
1488 #
1489 # LIBCFS_WAIT_VAR_EVENT
1490 #
1491 # Kernel version 4.16-rc4 commit 6b2bb7265f0b62605e8caee3613449ed0db270b9
1492 # added wait_var_event()
1493 #
1494 AC_DEFUN([LIBCFS_SRC_WAIT_VAR_EVENT], [
1495         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1496                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1497         else
1498                 WAIT_BIT_H=""
1499         fi
1500         LB2_LINUX_TEST_SRC([wait_var_event], [
1501                 #ifdef HAVE_WAIT_BIT_HEADER_H
1502                 #include <linux/wait_bit.h>
1503                 #endif
1504                 #include <linux/wait.h>
1505         ],[
1506                 wake_up_var(NULL);
1507         ],[${WAIT_BIT_H}])
1508 ])
1509 AC_DEFUN([LIBCFS_WAIT_VAR_EVENT], [
1510         LB2_MSG_LINUX_TEST_RESULT([if 'wait_var_event' exist],
1511         [wait_var_event], [
1512                 AC_DEFINE(HAVE_WAIT_VAR_EVENT, 1,
1513                         ['wait_var_event' is available])
1514         ])
1515 ]) # LIBCFS_WAIT_VAR_EVENT
1516
1517 #
1518 # LIBCFS_BITMAP_ALLOC
1519 #
1520 # Kernel version 4.17 commit c42b65e363ce97a828f81b59033c3558f8fa7f70
1521 # added bitmap memory allocation handling.
1522 #
1523 AC_DEFUN([LIBCFS_SRC_BITMAP_ALLOC], [
1524         LB2_LINUX_TEST_SRC([bitmap_alloc], [
1525                 #include <linux/bitmap.h>
1526         ],[
1527                 unsigned long *map = bitmap_alloc(1, GFP_KERNEL);
1528                 (void)map;
1529         ])
1530 ])
1531 AC_DEFUN([LIBCFS_BITMAP_ALLOC], [
1532         LB2_MSG_LINUX_TEST_RESULT([if Linux bitmap memory management exist],
1533         [bitmap_alloc], [
1534                 AC_DEFINE(HAVE_BITMAP_ALLOC, 1,
1535                         [Linux bitmap can be allocated])
1536         ])
1537 ]) # LIBCFS_BITMAP_ALLOC
1538
1539 #
1540 # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1541 #
1542 # Kernel version 4.17-rc2 commit 8236b0ae31c837d2b3a2565c5f8d77f637e824cc
1543 # added clear_and_wake_up_bit()
1544 #
1545 AC_DEFUN([LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT], [
1546         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1547                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1548         else
1549                 WAIT_BIT_H=""
1550         fi
1551         LB2_LINUX_TEST_SRC([clear_and_wake_up_bit], [
1552                 #ifdef HAVE_WAIT_BIT_HEADER_H
1553                 #include <linux/wait_bit.h>
1554                 #endif
1555                 #include <linux/wait.h>
1556         ],[
1557                 clear_and_wake_up_bit(0, NULL);
1558         ],[${WAIT_BIT_H}])
1559 ])
1560 AC_DEFUN([LIBCFS_CLEAR_AND_WAKE_UP_BIT], [
1561         LB2_MSG_LINUX_TEST_RESULT([if 'clear_and_wake_up_bit' exist],
1562         [clear_and_wake_up_bit], [
1563                 AC_DEFINE(HAVE_CLEAR_AND_WAKE_UP_BIT, 1,
1564                         ['clear_and_wake_up_bit' is available])
1565         ])
1566 ]) # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1567
1568 #
1569 # LIBCFS_TCP_SOCK_SET_NODELAY
1570 #
1571 # kernel 4.18.0-293.el8
1572 # tcp_sock_set_nodelay() was added
1573 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_NODELAY], [
1574         LB2_LINUX_TEST_SRC([tcp_sock_set_nodelay_exists], [
1575                 #include <linux/tcp.h>
1576         ],[
1577                 tcp_sock_set_nodelay(NULL);
1578         ],[-Werror])
1579 ])
1580 AC_DEFUN([LIBCFS_TCP_SOCK_SET_NODELAY], [
1581         LB2_MSG_LINUX_TEST_RESULT([if 'tcp_sock_set_nodelay()' exists],
1582         [tcp_sock_set_nodelay_exists], [
1583                 AC_DEFINE(HAVE_TCP_SOCK_SET_NODELAY, 1,
1584                         ['tcp_sock_set_nodelay()' exists])
1585         ])
1586 ]) # LIBCFS_TCP_SOCK_SET_NODELAY
1587
1588 #
1589 # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1590 #
1591 # kernel 4.18.0-293.el8
1592 # tcp_sock_set_keepidle() was added
1593 #
1594 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE], [
1595         LB2_LINUX_TEST_SRC([tcp_sock_set_keepidle_exists], [
1596                 #include <linux/tcp.h>
1597         ],[
1598                 tcp_sock_set_keepidle(NULL, 0);
1599         ],[-Werror])
1600 ])
1601 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPIDLE], [
1602         LB2_MSG_LINUX_TEST_RESULT([if 'tcp_sock_set_keepidle()' exists],
1603         [tcp_sock_set_keepidle_exists], [
1604                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPIDLE, 1,
1605                         ['tcp_sock_set_keepidle()' exists])
1606         ])
1607 ]) # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1608
1609 #
1610 # LIBCFS_TCP_SOCK_SET_QUICKACK
1611 # kernel v5.7-rc6-2504-gddd061b8daed
1612 #   tcp: add tcp_sock_set_quickack
1613 #
1614 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_QUICKACK], [
1615         LB2_LINUX_TEST_SRC([tcp_sock_set_quickack_exists], [
1616                 #include <linux/tcp.h>
1617         ],[
1618                 tcp_sock_set_quickack(NULL, 0);
1619         ],[-Werror])
1620 ])
1621 AC_DEFUN([LIBCFS_TCP_SOCK_SET_QUICKACK], [
1622         LB2_MSG_LINUX_TEST_RESULT([if 'tcp_sock_set_quickack()' exists],
1623         [tcp_sock_set_quickack_exists], [
1624                 AC_DEFINE(HAVE_TCP_SOCK_SET_QUICKACK, 1,
1625                         ['tcp_sock_set_quickack()' exists])
1626         ])
1627 ]) # LIBCFS_TCP_SOCK_SET_QUICKACK
1628
1629 #
1630 # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1631 # v5.7-rc6-2508-gd41ecaac903c
1632 # tcp: add tcp_sock_set_keepintvl
1633 #
1634 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL], [
1635         LB2_LINUX_TEST_SRC([tcp_sock_set_keepintvl_exists], [
1636                 #include <linux/tcp.h>
1637         ],[
1638                 tcp_sock_set_keepintvl(NULL, 0);
1639         ],[-Werror])
1640 ])
1641 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPINTVL], [
1642         LB2_MSG_LINUX_TEST_RESULT([if 'tcp_sock_set_keepintvl()' exists],
1643         [tcp_sock_set_keepintvl_exists], [
1644                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPINTVL, 1,
1645                         ['tcp_sock_set_keepintvl()' exists])
1646         ])
1647 ]) # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1648
1649 #
1650 # LIBCFS_TCP_SOCK_SET_KEEPCNT
1651 # v5.7-rc6-2509-g480aeb9639d6
1652 # tcp: add tcp_sock_set_keepcnt
1653 #
1654 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT], [
1655         LB2_LINUX_TEST_SRC([tcp_sock_set_keepcnt_exists], [
1656                 #include <linux/tcp.h>
1657         ],[
1658                 tcp_sock_set_keepcnt(NULL, 0);
1659         ],[-Werror])
1660 ])
1661 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPCNT], [
1662         LB2_MSG_LINUX_TEST_RESULT([if 'tcp_sock_set_keepcnt()' exists],
1663         [tcp_sock_set_keepcnt_exists], [
1664                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPCNT, 1,
1665                         ['tcp_sock_set_keepcnt()' exists])
1666         ])
1667 ]) # LIBCFS_TCP_SOCK_SET_KEEPCNT
1668
1669 #
1670 # LIBCFS_XARRAY_SUPPORT
1671 #
1672 # 4.19-rc5 kernel commit 3159f943aafdbacb2f94c38fdaadabf2bbde2a14
1673 # replaced the radix tree implementation with Xarrays. This change
1674 # introduced functionaly needed for general Xarray support
1675 #
1676 AC_DEFUN([LIBCFS_SRC_XARRAY_SUPPORT], [
1677         LB2_LINUX_TEST_SRC([xarray_support], [
1678                 #include <linux/xarray.h>
1679         ],[
1680                 xa_is_value(NULL);
1681         ],[-Werror])
1682 ])
1683 AC_DEFUN([LIBCFS_XARRAY_SUPPORT], [
1684         LB2_MSG_LINUX_TEST_RESULT([if page cache uses Xarray],
1685         [xarray_support], [
1686                 AC_DEFINE(HAVE_XARRAY_SUPPORT, 1,
1687                         [kernel Xarray implementation lacks 'xa_is_value'])
1688         ])
1689 ]) # LIBCFS_XARRAY_SUPPORT
1690
1691 #
1692 # LIBCFS_NL_DUMP_EXT_ACK
1693 #
1694 # Kernel version 4.19-rc6 commit 4a19edb60d0203cd5bf95a8b46ea8f63fd41194c
1695 # added extended ACK handling to Netlink dump handlers
1696 #
1697 AC_DEFUN([LIBCFS_SRC_NL_DUMP_EXT_ACK], [
1698         LB2_LINUX_TEST_SRC([netlink_dump_ext_ack], [
1699                 #include <net/netlink.h>
1700         ],[
1701                 struct netlink_callback *cb = NULL;
1702                 cb->extack = NULL;
1703         ],[])
1704 ])
1705 AC_DEFUN([LIBCFS_NL_DUMP_EXT_ACK], [
1706         LB2_MSG_LINUX_TEST_RESULT([if Netlink dump handlers support ext_ack],
1707         [netlink_dump_ext_ack], [
1708                 AC_DEFINE(HAVE_NL_DUMP_WITH_EXT_ACK, 1,
1709                         [netlink_ext_ack is handled for Netlink dump handlers])
1710         ])
1711 ]) # LIBCFS_NL_DUMP_EXT_ACK
1712
1713 #
1714 # LIBCFS_HAVE_IOV_ITER_TYPE
1715 #
1716 # kernel 4.20 commit 00e23707442a75b404392cef1405ab4fd498de6b
1717 # iov_iter: Use accessor functions to access an iterator's type and direction.
1718 #
1719 AC_DEFUN([LIBCFS_SRC_HAVE_IOV_ITER_TYPE], [
1720         LB2_LINUX_TEST_SRC([macro_iov_iter_type_exists], [
1721                 #include <linux/uio.h>
1722         ],[
1723                 struct iov_iter iter = { };
1724                 enum iter_type type = iov_iter_type(&iter);
1725                 (void)type;
1726         ],[-Werror])
1727 ])
1728 AC_DEFUN([LIBCFS_HAVE_IOV_ITER_TYPE], [
1729         LB2_MSG_LINUX_TEST_RESULT([if iov_iter_type exists],
1730         [macro_iov_iter_type_exists], [
1731                 AC_DEFINE(HAVE_IOV_ITER_TYPE, 1,
1732                         [if iov_iter_type exists])
1733         ])
1734 ]) # LIBCFS_HAVE_IOV_ITER_TYPE
1735
1736 #
1737 # LIBCFS_GENRADIX
1738 #
1739 # Kernel 5.0 commit ba20ba2e3743bac786dff777954c11930256075e
1740 # implemented generic radix trees to handle very large memory
1741 # allocation that can be used instead of vmalloc which has
1742 # a performance penalty.
1743 #
1744 AC_DEFUN([LIBCFS_GENRADIX], [
1745 LB_CHECK_EXPORT([__genradix_ptr], [lib/generic-radix-tree.c],
1746         [AC_DEFINE(HAVE_GENRADIX_SUPPORT, 1,
1747                 [generic-radix-tree is present])])
1748 ]) # LIBCFS_GENRADIX
1749
1750 #
1751 # LIBCFS_GET_REQUEST_KEY_AUTH
1752 #
1753 # kernel 5.0 commit 822ad64d7e46a8e2c8b8a796738d7b657cbb146d
1754 # keys: Fix dependency loop between construction record and auth key
1755 #
1756 # Added <keys/request_key_auth-type.h> and get_request_key_auth()
1757 # which was propagated to stable
1758 #
1759 AC_DEFUN([LIBCFS_SRC_GET_REQUEST_KEY_AUTH], [
1760         LB2_LINUX_TEST_SRC([get_request_key_auth_exported], [
1761                 #include <linux/key.h>
1762                 #include <linux/keyctl.h>
1763                 #include <keys/request_key_auth-type.h>
1764         ],[
1765                 struct key *ring;
1766                 const struct key *key = NULL;
1767                 struct request_key_auth *rka = get_request_key_auth(key);
1768
1769                 ring = key_get(rka->dest_keyring);
1770         ],[-Werror])
1771 ])
1772 AC_DEFUN([LIBCFS_GET_REQUEST_KEY_AUTH], [
1773         LB2_MSG_LINUX_TEST_RESULT([if get_request_key_auth() is available],
1774         [get_request_key_auth_exported], [
1775                 AC_DEFINE(HAVE_GET_REQUEST_KEY_AUTH, 1,
1776                         [get_request_key_auth() is available])
1777         ])
1778 ]) # LIBCFS_GET_REQUEST_KEY_AUTH
1779
1780 #
1781 # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1782 #
1783 # Linux commit v5.1-rc3-29-gaa30f47cf666
1784 #    kobject: Add support for default attribute groups to kobj_type
1785 # Linux commit v5.18-rc1-2-gcdb4f26a63c3
1786 #    kobject: kobj_type: remove default_attrs
1787 #
1788 AC_DEFUN([LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS],[
1789         LB2_LINUX_TEST_SRC([kobj_type_default_groups], [
1790                 #include <linux/kobject.h>
1791         ],[
1792                 struct kobj_type *kobj_type = NULL;
1793                 void *has = kobj_type->default_groups;
1794                 (void) has;
1795         ])
1796 ])
1797 AC_DEFUN([LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS],[
1798         LB2_MSG_LINUX_TEST_RESULT([does struct kobj_type have 'default_groups' member],
1799         [kobj_type_default_groups], [
1800                 AC_DEFINE(HAVE_KOBJ_TYPE_DEFAULT_GROUPS, 1,
1801                         [struct kobj_type has 'default_groups' member])
1802         ])
1803 ]) # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1804
1805 #
1806 # LIBCFS_LOOKUP_USER_KEY
1807 #
1808 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1809 # signal: Remove task parameter from force_sig
1810 #
1811 AC_DEFUN([LIBCFS_SRC_LOOKUP_USER_KEY], [
1812         LB2_LINUX_TEST_SRC([lookup_user_key_exported], [
1813                 #include <linux/key.h>
1814                 #include <linux/keyctl.h>
1815         ],[
1816                 lookup_user_key(KEY_SPEC_USER_KEYRING, 0, 0);
1817         ],[-Werror])
1818 ])
1819 AC_DEFUN([LIBCFS_LOOKUP_USER_KEY], [
1820         LB2_MSG_LINUX_TEST_RESULT([if lookup_user_key() is available],
1821         [lookup_user_key_exported], [
1822                 AC_DEFINE(HAVE_LOOKUP_USER_KEY, 1,
1823                         [lookup_user_key() is available])
1824         ])
1825 ]) # LIBCFS_LOOKUP_USER_KEY
1826
1827 #
1828 # LIBCFS_CACHE_DETAIL_WRITERS
1829 #
1830 # kernel v5.3-rc2-1-g64a38e840ce5
1831 # SUNRPC: Track writers of the 'channel' file to improve cache_listeners_exist
1832 #
1833 AC_DEFUN([LIBCFS_SRC_CACHE_DETAIL_WRITERS], [
1834         LB2_LINUX_TEST_SRC([cache_detail_writers_atomic], [
1835                 #include <linux/sunrpc/cache.h>
1836
1837                 static struct cache_detail rsi_cache;
1838         ],[
1839                 atomic_set(&rsi_cache.writers, 0);
1840         ],[-Werror])
1841 ])
1842 AC_DEFUN([LIBCFS_CACHE_DETAIL_WRITERS], [
1843         LB2_MSG_LINUX_TEST_RESULT([if struct cache_detail has writers],
1844         [cache_detail_writers_atomic], [
1845                 AC_DEFINE(HAVE_CACHE_DETAIL_WRITERS, 1,
1846                         [struct cache_detail has writers])
1847         ])
1848 ]) # LIBCFS_CACHE_DETAIL_WRITERS
1849
1850 #
1851 # LIBCFS_GENL_DUMPIT_INFO
1852 #
1853 # kernel v5.4-rc1 commit bf813b0afeae2f012f0e527a526c1b78ca21ad82
1854 # expanded struct genl_dumpit_info to include struct genl_family.
1855 #
1856 AC_DEFUN([LIBCFS_SRC_GENL_DUMPIT_INFO], [
1857         LB2_LINUX_TEST_SRC([genl_dumpit_info], [
1858                 #include <net/genetlink.h>
1859         ],[
1860                 static struct genl_dumpit_info info;
1861
1862                 info.family = NULL;
1863         ],[-Werror])
1864 ])
1865 AC_DEFUN([LIBCFS_GENL_DUMPIT_INFO], [
1866         LB2_MSG_LINUX_TEST_RESULT([if struct genl_dumpit_info has family field],
1867         [genl_dumpit_info], [
1868                 AC_DEFINE(HAVE_GENL_DUMPIT_INFO, 1,
1869                         [struct genl_dumpit_info has family field])
1870         ])
1871 ]) # LIBCFS_GENL_DUMPIT_INFO
1872
1873 #
1874 # LIBCFS_KALLSYMS_LOOKUP
1875 #
1876 # kernel v5.6-11591-g0bd476e6c671
1877 # kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()
1878 AC_DEFUN([LIBCFS_KALLSYMS_LOOKUP], [
1879 LB_CHECK_EXPORT([kallsyms_lookup_name], [kernel/kallsyms.c],
1880         [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1881                 [kallsyms_lookup_name is exported by kernel])])
1882 ]) # LIBCFS_KALLSYMS_LOOKUP
1883
1884 #
1885 # v5.5-8862-gd56c0d45f0e2
1886 # proc: decouple proc from VFS with "struct proc_ops"
1887 #
1888 AC_DEFUN([LIBCFS_SRC_HAVE_PROC_OPS], [
1889         LB2_LINUX_TEST_SRC([proc_ops], [
1890                 #include <linux/proc_fs.h>
1891
1892                 static struct proc_ops *my_proc;
1893         ],[
1894                 my_proc->proc_lseek = NULL;
1895         ],[-Werror])
1896 ]) # LIBCFS_SRC_HAVE_PROC_OPS
1897 AC_DEFUN([LIBCFS_HAVE_PROC_OPS], [
1898         LB2_MSG_LINUX_TEST_RESULT([if struct proc_ops exists],
1899         [proc_ops], [
1900                 AC_DEFINE(HAVE_PROC_OPS, 1,
1901                         [struct proc_ops exists])
1902         ])
1903 ]) # LIBCFS_HAVE_PROC_OPS
1904
1905 #
1906 # LIBCFS_IP6_SET_PREF
1907 #
1908 # kernel v5.8-rc1~165^2~71^2~3 commit 18d5ad62327576cbb1e5b9938a59d63ac0c15832
1909 # ipv6: add ip6_sock_set_addr_preferences
1910 #
1911 AC_DEFUN([LIBCFS_SRC_IP6_SET_PREF], [
1912         LB2_LINUX_TEST_SRC([ip6_set_pref_test], [
1913                 #include <net/ipv6.h>
1914         ],[
1915                 ip6_sock_set_addr_preferences(NULL, 0);
1916         ],[-Werror])
1917 ])
1918 AC_DEFUN([LIBCFS_IP6_SET_PREF], [
1919         LB2_MSG_LINUX_TEST_RESULT([if ip6_sock_set_addr_preferences() exists],
1920         [ip6_set_pref_test], [
1921                 AC_DEFINE(HAVE_IP6_SET_PREF, 1,
1922                         [if ip6_sock_set_addr_preferences exists])
1923         ])
1924 ]) # LIBCFS_IP6_SET_PREF
1925
1926 #
1927 # LIBCFS_IP_SET_TOS
1928 #
1929 # kernel v5.8-rc1~165^2~71^2~3 commit 6ebf71bab9fb476fc8132be4c12b88201278f0ca
1930 # ipv4: add ip_sock_set_tos
1931 #
1932 AC_DEFUN([LIBCFS_SRC_IP_SET_TOS], [
1933         LB2_LINUX_TEST_SRC([ip_set_tos_test], [
1934                 #include <net/ip.h>
1935         ],[
1936                 ip_sock_set_tos(NULL, 0);
1937         ],[-Werror])
1938 ])
1939 AC_DEFUN([LIBCFS_IP_SET_TOS], [
1940         LB2_MSG_LINUX_TEST_RESULT([if ip_sock_set_tos() exists],
1941         [ip_set_tos_test], [
1942                 AC_DEFINE(HAVE_IP_SET_TOS, 1,
1943                         [if ip_sock_set_tos exists])
1944         ])
1945 ]) # LIBCFS_IP_SET_TOS
1946
1947 #
1948 # LIBCFS_VMALLOC_2ARGS
1949 #
1950 # kernel v5.8-rc1~201^2~19
1951 # mm: remove the pgprot argument to __vmalloc
1952 AC_DEFUN([LIBCFS_SRC_VMALLOC_2ARGS], [
1953         LB2_LINUX_TEST_SRC([vmalloc_2args], [
1954                 #include <linux/vmalloc.h>
1955         ],[
1956                 __vmalloc(0, 0);
1957         ],[])
1958 ])
1959 AC_DEFUN([LIBCFS_VMALLOC_2ARGS], [
1960         LB2_MSG_LINUX_TEST_RESULT([if __vmalloc has 2 args],
1961         [vmalloc_2args], [
1962                 AC_DEFINE(HAVE_VMALLOC_2ARGS, 1,
1963                         [__vmalloc only takes 2 args.])
1964         ])
1965 ]) # LIBCFS_VMALLOC_2ARGS
1966
1967 #
1968 # LIBCFS_HAVE_NR_UNSTABLE_NFS
1969 #
1970 # kernel v5.8-rc1~201^2~75
1971 # mm/writeback: discard NR_UNSTABLE_NFS, use NR_WRITEBACK instead
1972 #
1973 AC_DEFUN([LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS], [
1974         LB2_LINUX_TEST_SRC([nr_unstable_nfs_exists], [
1975                 #include <linux/mm.h>
1976
1977                 int i;
1978         ],[
1979                 i = NR_UNSTABLE_NFS;
1980         ],[-Werror])
1981 ])
1982 AC_DEFUN([LIBCFS_HAVE_NR_UNSTABLE_NFS], [
1983         LB2_MSG_LINUX_TEST_RESULT([if NR_UNSTABLE_NFS still in use],
1984         [nr_unstable_nfs_exists], [
1985                 AC_DEFINE(HAVE_NR_UNSTABLE_NFS, 1,
1986                         [NR_UNSTABLE_NFS is still in use.])
1987         ])
1988 ]) # LIBCFS_HAVE_NR_UNSTABLE_NFS
1989
1990 #
1991 # LIBCFS_HAVE_MMAP_LOCK
1992 #
1993 # kernel v5.8-rc1~83^2~24
1994 # mmap locking API: rename mmap_sem to mmap_lock
1995 #
1996 AC_DEFUN([LIBCFS_SRC_HAVE_MMAP_LOCK], [
1997         LB2_LINUX_TEST_SRC([mmap_write_lock], [
1998                 #include <linux/mm.h>
1999         ],[
2000                 mmap_write_lock(NULL);
2001         ],[])
2002 ])
2003 AC_DEFUN([LIBCFS_HAVE_MMAP_LOCK], [
2004         LB2_MSG_LINUX_TEST_RESULT([if mmap_lock API is available],
2005         [mmap_write_lock], [
2006                 AC_DEFINE(HAVE_MMAP_LOCK, 1,
2007                         [mmap_lock API is available.])
2008         ])
2009 ]) # LIBCFS_HAVE_MMAP_LOCK
2010
2011 #
2012 # LIBCFS_KERNEL_SETSOCKOPT
2013 #
2014 # kernel v5.8-rc1~165^2~59^2
2015 # net: remove kernel_setsockopt
2016 AC_DEFUN([LIBCFS_SRC_KERNEL_SETSOCKOPT], [
2017         LB2_LINUX_TEST_SRC([kernel_setsockopt_exists], [
2018                 #include <linux/net.h>
2019         ],[
2020                 kernel_setsockopt(NULL, 0, 0, NULL, 0);
2021         ],[-Werror])
2022 ])
2023 AC_DEFUN([LIBCFS_KERNEL_SETSOCKOPT], [
2024         LB2_MSG_LINUX_TEST_RESULT([if kernel_setsockopt still in use],
2025         [kernel_setsockopt_exists], [
2026         AC_DEFINE(HAVE_KERNEL_SETSOCKOPT, 1,
2027                 [kernel_setsockopt still in use])
2028         ])
2029 ]) # LIBCFS_KERNEL_SETSOCKOPT
2030
2031 #
2032 # LIBCFS_USER_UID_KEYRING
2033 #
2034 # kernel 5.2 commit 0f44e4d976f9 removed uid_keyring
2035 # from the user_struct struct
2036 #
2037 AC_DEFUN([LIBCFS_SRC_USER_UID_KEYRING], [
2038         LB2_LINUX_TEST_SRC([user_uid_keyring_exists], [
2039                 #include <linux/sched/user.h>
2040         ],[
2041                 ((struct user_struct *)0)->uid_keyring = NULL;
2042         ],[-Werror])
2043 ])
2044 AC_DEFUN([LIBCFS_USER_UID_KEYRING], [
2045         AC_MSG_CHECKING([if uid_keyring exists])
2046         LB2_LINUX_TEST_RESULT([user_uid_keyring_exists], [
2047                 AC_DEFINE(HAVE_USER_UID_KEYRING, 1,
2048                         [uid_keyring exists])
2049         ])
2050 ]) # LIBCFS_USER_UID_KEYRING
2051
2052 #
2053 # LIBCFS_KEY_NEED_UNLINK
2054 #
2055 # kernel 5.8 commit 8c0637e950d68933a67f7438f779d79b049b5e5c
2056 # keys: Make the KEY_NEED_* perms an enum rather than a mask
2057 #
2058 AC_DEFUN([LIBCFS_SRC_KEY_NEED_UNLINK], [
2059         LB2_LINUX_TEST_SRC([key_need_unlink_exists], [
2060                 #include <linux/key.h>
2061                 #include <linux/keyctl.h>
2062         ],[
2063                 lookup_user_key(0, 0, KEY_NEED_UNLINK);
2064         ],[-Werror])
2065 ])
2066 AC_DEFUN([LIBCFS_KEY_NEED_UNLINK], [
2067         LB2_MSG_LINUX_TEST_RESULT([if KEY_NEED_UNLINK exists],
2068         [key_need_unlink_exists], [
2069                 AC_DEFINE(HAVE_KEY_NEED_UNLINK, 1,
2070                         [KEY_NEED_UNLINK exists])
2071         ])
2072 ]) # LIBCFS_KEY_NEED_UNLINK
2073
2074 #
2075 # LIBCFS_SEC_RELEASE_SECCTX
2076 #
2077 # kernel linux-hwe-5.8 (5.8.0-22.23~20.04.1)
2078 # LSM: Use lsmcontext in security_release_secctx
2079 AC_DEFUN([LIBCFS_SRC_SEC_RELEASE_SECCTX], [
2080         LB2_LINUX_TEST_SRC([security_release_secctx_1arg], [
2081                 #include <linux/security.h>
2082         ],[
2083                 security_release_secctx(NULL);
2084         ],[])
2085 ])
2086 AC_DEFUN([LIBCFS_SEC_RELEASE_SECCTX], [
2087         LB2_MSG_LINUX_TEST_RESULT([if security_release_secctx has 1 arg],
2088         [security_release_secctx_1arg], [
2089                 AC_DEFINE(HAVE_SEC_RELEASE_SECCTX_1ARG, 1,
2090                         [security_release_secctx has 1 arg.])
2091         ])
2092 ]) # LIBCFS_SEC_RELEASE_SECCTX
2093
2094 #
2095 # LIBCFS_HAVE_KFREE_SENSITIVE
2096 #
2097 # kernel v5.10-rc1~3
2098 # mm: remove kzfree() compatibility definition
2099 #
2100 AC_DEFUN([LIBCFS_SRC_HAVE_KFREE_SENSITIVE], [
2101         LB2_LINUX_TEST_SRC([kfree_sensitive_exists], [
2102                 #include <linux/slab.h>
2103         ],[
2104                 kfree_sensitive(NULL);
2105         ], [-Werror])
2106 ])
2107 AC_DEFUN([LIBCFS_HAVE_KFREE_SENSITIVE], [
2108         LB2_MSG_LINUX_TEST_RESULT([if kfree_sensitive() is available],
2109         [kfree_sensitive_exists], [
2110                 AC_DEFINE(HAVE_KFREE_SENSITIVE, 1,
2111                         [kfree_sensitive() is available.])
2112         ])
2113 ]) # LIBCFS_HAVE_KFREE_SENSITIVE
2114
2115 #
2116 # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2117 #
2118 # Kernel v5.10-rc1-114-ga24d22b225ce
2119 # crypto: sha - split sha.h into sha1.h and sha2.h
2120 #
2121 AC_DEFUN([LIBCFS_SRC_HAVE_CRYPTO_SHA2_HEADER], [
2122         LB2_CHECK_LINUX_HEADER_SRC([crypto/sha2.h], [-Werror])
2123 ])
2124 AC_DEFUN([LIBCFS_HAVE_CRYPTO_SHA2_HEADER], [
2125         LB2_CHECK_LINUX_HEADER_RESULT([crypto/sha2.h], [
2126                 AC_DEFINE(HAVE_CRYPTO_SHA2_HEADER, 1,
2127                         [crypto/sha2.h is present])
2128         ])
2129 ]) # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2130
2131 #
2132 # LIBCFS_HAVE_LIST_CMP_FUNC_T
2133 #
2134 # kernel 5.10.70 commit 4f0f586bf0c898233d8f316f471a21db2abd522d
2135 # treewide: Change list_sort to use const pointers
2136 AC_DEFUN([LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T], [
2137         LB2_LINUX_TEST_SRC([list_cmp_func_t_exists], [
2138                 #include <linux/list_sort.h>
2139         ],[
2140                 list_cmp_func_t cmp;
2141                 (void)cmp;
2142         ], [-Werror])
2143 ])
2144 AC_DEFUN([LIBCFS_HAVE_LIST_CMP_FUNC_T], [
2145         LB2_MSG_LINUX_TEST_RESULT([if list_cmp_func_t type is defined],
2146         [list_cmp_func_t_exists], [
2147                 AC_DEFINE(HAVE_LIST_CMP_FUNC_T, 1,
2148                         [list_cmp_func_t type is defined])
2149         ])
2150 ]) # LIBCFS_HAVE_LIST_CMP_FUNC_T
2151
2152 #
2153 # LIBCFS_NLA_STRLCPY
2154 #
2155 # Kernel version 5.10-rc3 commit 872f690341948b502c93318f806d821c56772c42
2156 # replaced nla_strlcpy() with nla_strscpy().
2157 #
2158 AC_DEFUN([LIBCFS_SRC_NLA_STRLCPY], [
2159         LB2_LINUX_TEST_SRC([nla_strlcpy], [
2160                 #include <net/netlink.h>
2161         ],[
2162                 if (nla_strlcpy(NULL, NULL, 0) == 0)
2163                         return -EINVAL;
2164         ])
2165 ])
2166 AC_DEFUN([LIBCFS_NLA_STRLCPY], [
2167         LB2_MSG_LINUX_TEST_RESULT([if 'nla_strlcpy()' still exists],
2168         [nla_strlcpy], [
2169                 AC_DEFINE(HAVE_NLA_STRLCPY, 1,
2170                         ['nla_strlcpy' is available])
2171         ])
2172 ]) # LIBCFS_NLA_STRLCPY
2173
2174 #
2175 # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2176 #
2177 # Linux v5.11-11104-ga28a6e860c6c
2178 #  string.h: move fortified functions definitions in a dedicated header.
2179 #
2180 AC_DEFUN([LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER],[
2181         LB2_LINUX_TEST_SRC([linux_fortify_string_header], [
2182                 #include <linux/fortify-string.h>
2183         ],[
2184         ],[])
2185 ])
2186 AC_DEFUN([LIBCFS_LINUX_FORTIFY_STRING_HEADER],[
2187         LB2_MSG_LINUX_TEST_RESULT([Is linux/fortify-string.h header available],
2188         [linux_fortify_string_header], [
2189                 AC_DEFINE(HAVE_LINUX_FORTIFY_STRING_HEADER, 1,
2190                         [linux/fortify-string.h header available])
2191         ])
2192 ]) # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2193
2194 #
2195 # LIBCFS_HAVE_CIPHER_HEADER
2196 #
2197 # Kernel 5.12 commit 0eb76ba29d16df2951d37c54ca279c4e5630b071
2198 # crypto: remove cipher routines from public crypto API
2199 #
2200 AC_DEFUN([LIBCFS_SRC_HAVE_CIPHER_HEADER], [
2201         LB2_CHECK_LINUX_HEADER_SRC([crypto/internal/cipher.h], [-Werror])
2202 ])
2203 AC_DEFUN([LIBCFS_HAVE_CIPHER_HEADER], [
2204         LB2_CHECK_LINUX_HEADER_RESULT([crypto/internal/cipher.h], [
2205                 AC_DEFINE(HAVE_CIPHER_H, 1,
2206                         [crypto/internal/cipher.h is present])
2207         ])
2208 ]) # LIBCFS_HAVE_CIPHER_HEADER
2209
2210 #
2211 # LIBCFS_HAVE_TASK_RUNNING
2212 #
2213 # Kernel 5.13-rc6 commit b03fbd4ff24c5f075e58eb19261d5f8b3e40d
2214 # introduced task_is_running() macro.
2215 #
2216 AC_DEFUN([LIBCFS_SRC_HAVE_TASK_IS_RUNNING], [
2217         LB2_LINUX_TEST_SRC([task_is_running], [
2218                 #include <linux/sched.h>
2219         ],[
2220                 if (task_is_running(current))
2221                         schedule();
2222         ], [-Werror])
2223 ])
2224 AC_DEFUN([LIBCFS_HAVE_TASK_IS_RUNNING], [
2225         LB2_MSG_LINUX_TEST_RESULT([if task_is_running() is defined],
2226         [task_is_running], [
2227                 AC_DEFINE(HAVE_TASK_IS_RUNNING, 1,
2228                         [task_is_running() is defined])
2229         ])
2230 ]) # LIBCFS_HAVE_TASK_IS_RUNNING
2231
2232 #
2233 # LIBCFS_LINUX_STDARG_HEADER
2234 #
2235 # Kernel 5.14-rc5 commit c0891ac15f0428ffa81b2e818d416bdf3cb74ab6
2236 # isystem: ship and use stdarg.h
2237 #
2238 AC_DEFUN([LIBCFS_SRC_LINUX_STDARG_HEADER], [
2239         LB2_CHECK_LINUX_HEADER_SRC([linux/stdarg.h], [-Werror])
2240 ])
2241 AC_DEFUN([LIBCFS_LINUX_STDARG_HEADER], [
2242         LB2_CHECK_LINUX_HEADER_RESULT([linux/stdarg.h], [
2243                 AC_DEFINE(HAVE_LINUX_STDARG_HEADER, 1,
2244                         [linux/stdarg.h is present])
2245         ])
2246 ]) # LIBCFS_LINUX_STDARG_HEADER
2247
2248 #
2249 # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2250 #
2251 # Kernel 5.14 commit f39650de687e35766572ac89dbcd16a5911e2f0a
2252 # kernel.h: split out panic and oops helpers
2253 #
2254 AC_DEFUN([LIBCFS_SRC_HAVE_PANIC_NOTIFIER_HEADER], [
2255         LB2_CHECK_LINUX_HEADER_SRC([linux/panic_notifier.h], [-Werror])
2256 ])
2257 AC_DEFUN([LIBCFS_HAVE_PANIC_NOTIFIER_HEADER], [
2258         LB2_CHECK_LINUX_HEADER_RESULT([linux/panic_notifier.h], [
2259                 AC_DEFINE(HAVE_PANIC_NOTIFIER_H, 1,
2260                         [linux/panic_notifier.h is present])
2261         ])
2262 ]) # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2263
2264 #
2265 # LIBCFS_PARAM_SET_UINT_MINMAX
2266 #
2267 # Kernel 5.15-rc1 commit 2a14c9ae15a38148484a128b84bff7e9ffd90d68
2268 # moved param_set_uint_minmax to common code
2269 #
2270 AC_DEFUN([LIBCFS_SRC_PARAM_SET_UINT_MINMAX],[
2271         LB2_LINUX_TEST_SRC([param_set_uint_minmax], [
2272                 #include <linux/moduleparam.h>
2273         ],[
2274                 param_set_uint_minmax(NULL, NULL, 0, 0);
2275         ], [])
2276 ])
2277 AC_DEFUN([LIBCFS_PARAM_SET_UINT_MINMAX],[
2278         LB2_MSG_LINUX_TEST_RESULT([does function 'param_set_uint_minmax' exist],
2279         [param_set_uint_minmax], [
2280                 AC_DEFINE(HAVE_PARAM_SET_UINT_MINMAX, 1,
2281                         ['param_set_uint_minmax' is available])
2282         ])
2283 ]) # LIBCFS_PARAM_SET_UINT_MINMAX
2284
2285 #
2286 # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2287 #
2288 # Kernel 5.15-rc6 commit fe45e630a1035aea94c29016f2598bbde149bbe3
2289 # block: move integrity handling out of <linux/blkdev.h>
2290 #
2291 AC_DEFUN([LIBCFS_SRC_LINUX_BLK_INTEGRITY_HEADER], [
2292         LB2_CHECK_LINUX_HEADER_SRC([linux/blk-integrity.h], [-Werror])
2293 ])
2294 AC_DEFUN([LIBCFS_LINUX_BLK_INTEGRITY_HEADER], [
2295         LB2_CHECK_LINUX_HEADER_RESULT([linux/blk-integrity.h], [
2296                 AC_DEFINE(HAVE_LINUX_BLK_INTEGRITY_HEADER, 1,
2297                         [linux/blk-integrity.h is present])
2298         ])
2299 ]) # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2300
2301 #
2302 # LIBCFS_PDE_DATA_EXISTS
2303 #
2304 # Linux commit v5.16-11573-g6dfbbae14a7b
2305 #    introduce pde_data()
2306 # Linux commit v5.16-11574-g359745d78351
2307 #    remove PDE_DATA()
2308 #
2309 AC_DEFUN([LIBCFS_SRC_PDE_DATA_EXISTS],[
2310         LB2_LINUX_TEST_SRC([pde_data], [
2311                 #include <linux/proc_fs.h>
2312         ],[
2313                 struct inode *inode = NULL;
2314                 void *data =pde_data(inode);
2315                 (void)data;
2316         ],[])
2317 ])
2318 AC_DEFUN([LIBCFS_PDE_DATA_EXISTS],[
2319         LB2_MSG_LINUX_TEST_RESULT([does function 'pde_data' exist],
2320         [pde_data], [
2321                 AC_DEFINE(HAVE_pde_data, 1, [function pde_data() available])
2322         ],[
2323                 AC_DEFINE(pde_data(inode), PDE_DATA(inode),
2324                           [function pde_data() unavailable])
2325         ])
2326 ]) # LIBCFS_PDE_DATA_EXISTS
2327
2328 #
2329 # LIBCFS_BIO_ALLOC_WITH_BDEV
2330 #
2331 # Linux commit v5.17-rc2-21-g07888c665b40
2332 #   block: pass a block_device and opf to bio_alloc
2333 #
2334 AC_DEFUN([LIBCFS_SRC_BIO_ALLOC_WITH_BDEV],[
2335         LB2_LINUX_TEST_SRC([bio_alloc_with_bdev], [
2336                 #include <linux/bio.h>
2337         ],[
2338                 struct block_device *bdev = NULL;
2339                 unsigned short nr_vecs = 1;
2340                 gfp_t gfp = GFP_KERNEL;
2341                 struct bio *bio = bio_alloc(bdev, nr_vecs, REQ_OP_WRITE, gfp);
2342                 (void) bio;
2343         ],[])
2344 ])
2345 AC_DEFUN([LIBCFS_BIO_ALLOC_WITH_BDEV],[
2346         LB2_MSG_LINUX_TEST_RESULT([does bio_alloc() takes a struct block_device],
2347         [bio_alloc_with_bdev], [
2348                 AC_DEFINE(HAVE_BIO_ALLOC_WITH_BDEV, 1,
2349                         [bio_alloc() takes a struct block_device])
2350         ])
2351 ]) # LIBCFS_BIO_ALLOC_WITH_BDEV
2352
2353 #
2354 # LIBCFS_TIMER_DELETE_SYNC
2355 #
2356 # Linux commit v6.1-rc1-7-g9a5a30568697
2357 #   timers: Get rid of del_singleshot_timer_sync()
2358 # Linux commit v6.1-rc1-11-g9b13df3fb64e
2359 #   timers: Rename del_timer_sync() to timer_delete_sync()
2360 #
2361 AC_DEFUN([LIBCFS_SRC_TIMER_DELETE_SYNC],[
2362         LB2_LINUX_TEST_SRC([timer_delete_sync], [
2363                 #include <linux/timer.h>
2364         ],[
2365                 struct timer_list *timer = NULL;
2366                 (void)timer_delete_sync(timer);
2367         ],[])
2368 ])
2369 AC_DEFUN([LIBCFS_TIMER_DELETE_SYNC],[
2370         LB2_MSG_LINUX_TEST_RESULT([is timer_delete_sync() available],
2371         [timer_delete_sync], [
2372                 AC_DEFINE(HAVE_TIMER_DELETE_SYNC, 1,
2373                         [timer_delete_sync() is available])
2374         ],[
2375                 AC_DEFINE(timer_delete_sync(t), del_timer_sync(t),
2376                         [timer_delete_sync() not is available])
2377         ])
2378 ]) # LIBCFS_TIMER_DELETE_SYNC
2379
2380 #
2381 # LIBCFS_TIMER_DELETE_SYNC
2382 #
2383 # Linux commit v6.1-rc1-12-gbb663f0f3c39
2384 #   timers: Rename del_timer() to timer_delete()
2385 #
2386 AC_DEFUN([LIBCFS_SRC_TIMER_DELETE],[
2387         LB2_LINUX_TEST_SRC([timer_delete], [
2388                 #include <linux/timer.h>
2389         ],[
2390                 struct timer_list *timer = NULL;
2391                 (void)timer_delete(timer);
2392         ],[])
2393 ])
2394 AC_DEFUN([LIBCFS_TIMER_DELETE],[
2395         LB2_MSG_LINUX_TEST_RESULT([is timer_delete() available],
2396         [timer_delete], [
2397                 AC_DEFINE(HAVE_TIMER_DELETE, 1,
2398                         [timer_delete() is available])
2399         ],[
2400                 AC_DEFINE(timer_delete(t), del_timer(t),
2401                         [timer_delete() not is available])
2402         ])
2403 ]) # LIBCFS_TIMER_DELETE
2404
2405 dnl #
2406 dnl # Generate and compile all of the kernel API test cases to determine
2407 dnl # which interfaces are available.  By invoking the kernel build system
2408 dnl # only once the compilation can be done in parallel significantly
2409 dnl # speeding up the process.
2410 dnl #
2411 AC_DEFUN([LIBCFS_PROG_LINUX_SRC], [
2412         # 3.11
2413         LIBCFS_SRC_KTIME_GET_TS64
2414         # 3.12
2415         LIBCFS_SRC_PREPARE_TO_WAIT_EVENT
2416         LIBCFS_SRC_KERNEL_PARAM_OPS
2417         LIBCFS_SRC_KTIME_ADD
2418         LIBCFS_SRC_KTIME_AFTER
2419         LIBCFS_SRC_KTIME_BEFORE
2420         LIBCFS_SRC_KTIME_COMPARE
2421         LIBCFS_SRC_SHRINKER_COUNT
2422         # 3.13
2423         LIBCFS_SRC_MATCH_WILDCARD
2424         # 3.14
2425         LIBCFS_SRC_HAVE_MAPPING_AS_EXITING_FLAG
2426         # 3.15
2427         LIBCFS_SRC_IOV_ITER_HAS_TYPE
2428         # 3.16
2429         LIBCFS_SRC_HAVE_GLOB
2430         # 3.17
2431         LIBCFS_SRC_HLIST_ADD_AFTER
2432         LIBCFS_SRC_TIMESPEC64
2433         LIBCFS_SRC_KTIME_GET_NS
2434         LIBCFS_SRC_KTIME_GET_REAL_TS64
2435         LIBCFS_SRC_KTIME_GET_REAL_SECONDS
2436         LIBCFS_SRC_KTIME_GET_REAL_NS
2437         LIBCFS_SRC_KTIME_TO_TIMESPEC64
2438         LIBCFS_SRC_TIMESPEC64_SUB
2439         LIBCFS_SRC_TIMESPEC64_TO_KTIME
2440         # 3.19
2441         LIBCFS_SRC_KTIME_GET_SECONDS
2442         LIBCFS_SRC_WAIT_WOKEN
2443         # 4.0
2444         LIBCFS_SRC_KTIME_MS_DELTA
2445         # 4.1
2446         LIBCFS_SRC_KERNEL_PARAM_LOCK
2447         # 4.2
2448         LIBCFS_SRC_STRSCPY_EXISTS
2449         LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK
2450         # 4.4
2451         LIBCFS_SRC_KSTRTOBOOL_FROM_USER
2452         LIBCFS_SRC_NETLINK_CALLBACK_START
2453         # 4.5
2454         LIBCFS_SRC_CRYPTO_HASH_HELPERS
2455         LIBCFS_SRC_RHASHTABLE_REPLACE
2456         # 4.6
2457         LIBCFS_SRC_BROKEN_HASH_64
2458         LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT
2459         LIBCFS_SRC_GET_USER_PAGES_6ARG
2460         LIBCFS_SRC_STRINGHASH
2461         # 4.7
2462         LIBCFS_SRC_RHASHTABLE_INSERT_FAST
2463         LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG
2464         # 4.8
2465         LIBCFS_SRC_HAVE_NR_ZONE_WRITE_PENDING
2466         LIBCFS_SRC_RHASHTABLE_LOOKUP
2467         LIBCFS_SRC_RHLTABLE
2468         LIBCFS_SRC_STACKTRACE_OPS
2469         # 4.9
2470         LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS
2471         LIBCFS_SRC_RHASHTABLE_WALK_ENTER
2472         # 4.10
2473         LIBCFS_SRC_HOTPLUG_STATE_MACHINE
2474         # 4.11
2475         LIBCFS_SRC_NL_EXT_ACK
2476         LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2477         LIBCFS_SRC_SCHED_HEADERS
2478         LIBCFS_SRC_KREF_READ
2479         LIBCFS_SRC_RHT_BUCKET_VAR
2480         # 4.12
2481         LIBCFS_SRC_CPUS_READ_LOCK
2482         LIBCFS_SRC_HAVE_PROCESSOR_HEADER
2483         LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME
2484         LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS
2485         LIBCFS_SRC_REFCOUNT_T
2486         LIBCFS_SRC_MEMALLOC_NORECLAIM
2487         # 4.13
2488         LIBCFS_SRC_NLA_STRDUP
2489         LIBCFS_SRC_WAIT_QUEUE_ENTRY
2490         # 4.14
2491         LIBCFS_SRC_DEFINE_TIMER
2492         LIBCFS_SRC_NEW_KERNEL_WRITE
2493         LIBCFS_SRC_NEW_KERNEL_READ
2494         # 4.15
2495         LIBCFS_SRC_BITMAP_TO_ARR32
2496         LIBCFS_SRC_TIMER_SETUP
2497         # 4.16
2498         LIBCFS_SRC_HAVE_NS_TO_TIMESPEC64
2499         LIBCFS_SRC_WAIT_VAR_EVENT
2500         # 4.17
2501         LIBCFS_SRC_BITMAP_ALLOC
2502         LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT
2503         # 4.18
2504         LIBCFS_SRC_TCP_SOCK_SET_NODELAY
2505         LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE
2506         # 4.19
2507         LIBCFS_SRC_XARRAY_SUPPORT
2508         LIBCFS_SRC_NL_DUMP_EXT_ACK
2509         # 4.20
2510         LIBCFS_SRC_HAVE_IOV_ITER_TYPE
2511         # 5.0
2512         LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC
2513         LIBCFS_SRC_GET_REQUEST_KEY_AUTH
2514         # 5.2
2515         LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS
2516         LIBCFS_SRC_USER_UID_KEYRING
2517         # 5.3
2518         LIBCFS_SRC_LOOKUP_USER_KEY
2519         LIBCFS_SRC_CACHE_DETAIL_WRITERS
2520         # 5.4
2521         LIBCFS_SRC_GENL_DUMPIT_INFO
2522         # 5.6
2523         LIBCFS_SRC_HAVE_PROC_OPS
2524         # 5.7
2525         LIBCFS_SRC_TCP_SOCK_SET_QUICKACK
2526         LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL
2527         LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT
2528         # 5.8
2529         LIBCFS_SRC_IP6_SET_PREF
2530         LIBCFS_SRC_IP_SET_TOS
2531         LIBCFS_SRC_VMALLOC_2ARGS
2532         LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS
2533         LIBCFS_SRC_KERNEL_SETSOCKOPT
2534         LIBCFS_SRC_KEY_NEED_UNLINK
2535         LIBCFS_SRC_SEC_RELEASE_SECCTX
2536         # 5.10
2537         LIBCFS_SRC_HAVE_KFREE_SENSITIVE
2538         LIBCFS_SRC_HAVE_CRYPTO_SHA2_HEADER
2539         LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T
2540         LIBCFS_SRC_NLA_STRLCPY
2541         # 5.12
2542         LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER
2543         LIBCFS_SRC_HAVE_CIPHER_HEADER
2544         # 5.13
2545         LIBCFS_SRC_HAVE_TASK_IS_RUNNING
2546         # 5.14
2547         LIBCFS_SRC_LINUX_STDARG_HEADER
2548         LIBCFS_SRC_HAVE_PANIC_NOTIFIER_HEADER
2549         # 5.15
2550         LIBCFS_SRC_PARAM_SET_UINT_MINMAX
2551         # 5.17
2552         LIBCFS_SRC_PDE_DATA_EXISTS
2553         LIBCFS_SRC_BIO_ALLOC_WITH_BDEV
2554         # 6.2
2555         LIBCFS_SRC_TIMER_DELETE_SYNC
2556         LIBCFS_SRC_TIMER_DELETE
2557 ])
2558
2559 dnl #
2560 dnl # Check results of kernel interface tests.
2561 dnl #
2562 AC_DEFUN([LIBCFS_PROG_LINUX_RESULTS], [
2563         # 3.11
2564         LIBCFS_KTIME_GET_TS64
2565         # 3.12
2566         LIBCFS_PREPARE_TO_WAIT_EVENT
2567         LIBCFS_KERNEL_PARAM_OPS
2568         LIBCFS_KTIME_ADD
2569         LIBCFS_KTIME_AFTER
2570         LIBCFS_KTIME_BEFORE
2571         LIBCFS_KTIME_COMPARE
2572         LIBCFS_SHRINKER_COUNT
2573         # 3.13
2574         LIBCFS_MATCH_WILDCARD
2575         # 3.14
2576         LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
2577         # 3.15
2578         LIBCFS_IOV_ITER_HAS_TYPE
2579         # 3.16
2580         LIBCFS_HAVE_GLOB
2581         # 3.17
2582         LIBCFS_HLIST_ADD_AFTER
2583         LIBCFS_TIMESPEC64
2584         LIBCFS_KTIME_GET_NS
2585         LIBCFS_KTIME_GET_REAL_TS64
2586         LIBCFS_KTIME_GET_REAL_SECONDS
2587         LIBCFS_KTIME_GET_REAL_NS
2588         LIBCFS_KTIME_TO_TIMESPEC64
2589         LIBCFS_TIMESPEC64_SUB
2590         LIBCFS_TIMESPEC64_TO_KTIME
2591         # 3.19
2592         LIBCFS_KTIME_GET_SECONDS
2593         LIBCFS_WAIT_WOKEN
2594         # 4.0
2595         LIBCFS_KTIME_MS_DELTA
2596         # 4.1
2597         LIBCFS_KERNEL_PARAM_LOCK
2598         # 4.2
2599         LIBCFS_STRSCPY_EXISTS
2600         LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
2601         # 4.4
2602         LIBCFS_KSTRTOBOOL_FROM_USER
2603         LIBCFS_NETLINK_CALLBACK_START
2604         # 4.5
2605         LIBCFS_CRYPTO_HASH_HELPERS
2606         LIBCFS_RHASHTABLE_REPLACE
2607         # 4.6
2608         LIBCFS_BROKEN_HASH_64
2609         LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
2610         LIBCFS_GET_USER_PAGES_6ARG
2611         LIBCFS_STRINGHASH
2612         # 4.7
2613         LIBCFS_RHASHTABLE_INSERT_FAST
2614         LIBCFS_RHASHTABLE_WALK_INIT_3ARG
2615         # 4.8
2616         LIBCFS_HAVE_NR_ZONE_WRITE_PENDING
2617         LIBCFS_RHASHTABLE_LOOKUP
2618         LIBCFS_RHLTABLE
2619         LIBCFS_STACKTRACE_OPS
2620         # 4.9
2621         LIBCFS_GET_USER_PAGES_GUP_FLAGS
2622         LIBCFS_RHASHTABLE_WALK_ENTER
2623         # 4.10
2624         LIBCFS_HOTPLUG_STATE_MACHINE
2625         # 4.11
2626         LIBCFS_NL_EXT_ACK
2627         LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2628         LIBCFS_SCHED_HEADERS
2629         LIBCFS_KREF_READ
2630         LIBCFS_RHT_BUCKET_VAR
2631         # 4.12
2632         LIBCFS_CPUS_READ_LOCK
2633         LIBCFS_HAVE_PROCESSOR_HEADER
2634         LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
2635         LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
2636         LIBCFS_REFCOUNT_T
2637         LIBCFS_MEMALLOC_NORECLAIM
2638         # 4.13
2639         LIBCFS_NLA_STRDUP
2640         LIBCFS_WAIT_QUEUE_ENTRY
2641         # 4.14
2642         LIBCFS_DEFINE_TIMER
2643         LIBCFS_NEW_KERNEL_WRITE
2644         LIBCFS_NEW_KERNEL_READ
2645         # 4.15
2646         LIBCFS_BITMAP_TO_ARR32
2647         LIBCFS_TIMER_SETUP
2648         # 4.16
2649         LIBCFS_HAVE_NS_TO_TIMESPEC64
2650         LIBCFS_WAIT_VAR_EVENT
2651         # 4.17
2652         LIBCFS_BITMAP_ALLOC
2653         LIBCFS_CLEAR_AND_WAKE_UP_BIT
2654         # 4.18
2655         LIBCFS_TCP_SOCK_SET_NODELAY
2656         LIBCFS_TCP_SOCK_SET_KEEPIDLE
2657         # 4.19
2658         LIBCFS_XARRAY_SUPPORT
2659         LIBCFS_NL_DUMP_EXT_ACK
2660         # 4.20
2661         LIBCFS_HAVE_IOV_ITER_TYPE
2662         # 5.0
2663         LIBCFS_MM_TOTALRAM_PAGES_FUNC
2664         LIBCFS_GET_REQUEST_KEY_AUTH
2665         # 5.2
2666         LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
2667         LIBCFS_USER_UID_KEYRING
2668         # 5.3
2669         LIBCFS_LOOKUP_USER_KEY
2670         LIBCFS_CACHE_DETAIL_WRITERS
2671         # 5.4
2672         LIBCFS_GENL_DUMPIT_INFO
2673         # 5.6
2674         LIBCFS_HAVE_PROC_OPS
2675         # 5.7
2676         LIBCFS_TCP_SOCK_SET_QUICKACK
2677         LIBCFS_TCP_SOCK_SET_KEEPINTVL
2678         LIBCFS_TCP_SOCK_SET_KEEPCNT
2679         # 5.8
2680         LIBCFS_IP6_SET_PREF
2681         LIBCFS_IP_SET_TOS
2682         LIBCFS_VMALLOC_2ARGS
2683         LIBCFS_HAVE_NR_UNSTABLE_NFS
2684         LIBCFS_KERNEL_SETSOCKOPT
2685         LIBCFS_KEY_NEED_UNLINK
2686         LIBCFS_SEC_RELEASE_SECCTX
2687         # 5.10
2688         LIBCFS_HAVE_KFREE_SENSITIVE
2689         LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2690         LIBCFS_HAVE_LIST_CMP_FUNC_T
2691         LIBCFS_NLA_STRLCPY
2692         # 5.12
2693         LIBCFS_LINUX_FORTIFY_STRING_HEADER
2694         LIBCFS_HAVE_CIPHER_HEADER
2695         # 5.13
2696         LIBCFS_HAVE_TASK_IS_RUNNING
2697         # 5.14
2698         LIBCFS_LINUX_STDARG_HEADER
2699         LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2700         # 5.15
2701         LIBCFS_PARAM_SET_UINT_MINMAX
2702         # 5.17
2703         LIBCFS_PDE_DATA_EXISTS
2704         LIBCFS_BIO_ALLOC_WITH_BDEV
2705         # 6.2
2706         LIBCFS_TIMER_DELETE_SYNC
2707         LIBCFS_TIMER_DELETE
2708 ])
2709
2710 #
2711 # LIBCFS_PROG_LINUX
2712 #
2713 # LibCFS linux kernel checks
2714 #
2715 AC_DEFUN([LIBCFS_PROG_LINUX], [
2716 AC_MSG_NOTICE([LibCFS kernel checks
2717 ==============================================================================])
2718 LIBCFS_CONFIG_PANIC_DUMPLOG
2719
2720 # 4.6 - Export Check
2721 LIBCFS_EXPORT_KSET_FIND_OBJ
2722 # 4.13 - Export Check
2723 LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
2724 # 5.0 - Export Check
2725 LIBCFS_GENRADIX
2726 # 5.7 - Export Check
2727 LIBCFS_KALLSYMS_LOOKUP
2728 ]) # LIBCFS_PROG_LINUX
2729
2730 #
2731 # LIBCFS_PATH_DEFAULTS
2732 #
2733 # default paths for installed files
2734 #
2735 AC_DEFUN([LIBCFS_PATH_DEFAULTS], [
2736 ]) # LIBCFS_PATH_DEFAULTS
2737
2738 #
2739 # LIBCFS_CONFIGURE
2740 #
2741 # other configure checks
2742 #
2743 AC_DEFUN([LIBCFS_CONFIGURE], [
2744 AC_MSG_NOTICE([LibCFS core checks
2745 ==============================================================================])
2746
2747 # libcfs/libcfs/util/nidstrings.c
2748 AC_CHECK_HEADERS([netdb.h asm/types.h endian.h])
2749
2750 # --------  Check for required packages  --------------
2751
2752 AC_MSG_NOTICE([LibCFS required packages checks
2753 ==============================================================================])
2754
2755 AC_MSG_CHECKING([whether to enable readline support])
2756 AC_ARG_ENABLE(readline,
2757         AS_HELP_STRING([--disable-readline],
2758                 [disable readline support]),
2759         [], [enable_readline="yes"])
2760 AC_MSG_RESULT([$enable_readline])
2761
2762 LIBREADLINE=""
2763 AS_IF([test "x$enable_readline" = xyes], [
2764         AC_CHECK_LIB([readline], [readline], [
2765                 LIBREADLINE="-lreadline"
2766                 AC_DEFINE(HAVE_LIBREADLINE, 1,
2767                         [readline library is available])
2768         ])
2769
2770         AC_SUBST(ENABLE_READLINE, yes)
2771 ], [
2772         AC_SUBST(ENABLE_READLINE, no)
2773 ])
2774 AC_SUBST(LIBREADLINE)
2775
2776 AC_MSG_CHECKING([whether to use libpthread for libcfs library])
2777 AC_ARG_ENABLE([libpthread],
2778         AS_HELP_STRING([--disable-libpthread],
2779                 [disable libpthread]),
2780         [], [enable_libpthread="yes"])
2781 AC_MSG_RESULT([$enable_libpthread])
2782
2783 PTHREAD_LIBS=""
2784 AS_IF([test "x$enable_libpthread" = xyes], [
2785         AC_CHECK_LIB([pthread], [pthread_create], [
2786                 PTHREAD_LIBS="-lpthread"
2787                 AC_DEFINE([HAVE_LIBPTHREAD], 1,
2788                         [use libpthread for libcfs library])
2789         ])
2790
2791         AC_SUBST(ENABLE_LIBPTHREAD, yes)
2792 ], [
2793         AC_SUBST(ENABLE_LIBPTHREAD, no)
2794         AC_MSG_WARN([Using libpthread for libcfs library is disabled explicitly])
2795 ])
2796 AC_SUBST(PTHREAD_LIBS)
2797 ]) # LIBCFS_CONFIGURE
2798
2799 #
2800 # LIBCFS_CONFIG_FILES
2801 #
2802 # files that should be generated with AC_OUTPUT
2803 #
2804 AC_DEFUN([LIBCFS_CONFIG_FILES], [
2805 AC_CONFIG_FILES([
2806 libcfs/Makefile
2807 libcfs/autoMakefile
2808 libcfs/autoconf/Makefile
2809 libcfs/include/Makefile
2810 libcfs/include/libcfs/Makefile
2811 libcfs/include/uapi/Makefile
2812 libcfs/include/libcfs/linux/Makefile
2813 libcfs/include/libcfs/util/Makefile
2814 libcfs/include/libcfs/crypto/Makefile
2815 libcfs/include/uapi/linux/Makefile
2816 libcfs/libcfs/Makefile
2817 libcfs/libcfs/autoMakefile
2818 libcfs/libcfs/linux/Makefile
2819 libcfs/libcfs/util/Makefile
2820 libcfs/libcfs/crypto/Makefile
2821 ])
2822 ]) # LIBCFS_CONFIG_FILES