libcfs/autoconf/lustre-libcfs.m4

   1 #
   2 # LIBCFS_CONFIG_CDEBUG
   3 #
   4 # whether to enable various libcfs debugs (CDEBUG, ENTRY/EXIT, LASSERT, etc.)
   5 #
   6 AC_DEFUN([LIBCFS_CONFIG_CDEBUG], [
   7 AC_MSG_CHECKING([whether to enable CDEBUG, CWARN])
   8 AC_ARG_ENABLE([libcfs_cdebug],
   9         AS_HELP_STRING([--disable-libcfs-cdebug],
  10                 [disable libcfs CDEBUG, CWARN]),
  11         [], [enable_libcfs_cdebug="yes"])
  12 AC_MSG_RESULT([$enable_libcfs_cdebug])
  13 AS_IF([test "x$enable_libcfs_cdebug" = xyes], [
  14         AC_DEFINE(CDEBUG_ENABLED, 1, [enable libcfs CDEBUG, CWARN])
  15         AC_SUBST(ENABLE_LIBCFS_CDEBUG, yes)
  16 ], [
  17         AC_SUBST(ENABLE_LIBCFS_CDEBUG, no)
  18 ])
  19
  20 AC_MSG_CHECKING([whether to enable ENTRY/EXIT])
  21 AC_ARG_ENABLE([libcfs_trace],
  22         AS_HELP_STRING([--disable-libcfs-trace],
  23                 [disable libcfs ENTRY/EXIT]),
  24         [], [enable_libcfs_trace="yes"])
  25 AC_MSG_RESULT([$enable_libcfs_trace])
  26 AS_IF([test "x$enable_libcfs_trace" = xyes], [
  27         AC_DEFINE(CDEBUG_ENTRY_EXIT, 1, [enable libcfs ENTRY/EXIT])
  28         AC_SUBST(ENABLE_LIBCFS_TRACE, yes)
  29 ], [
  30         AC_SUBST(ENABLE_LIBCFS_TRACE, no)
  31 ])
  32
  33 AC_MSG_CHECKING([whether to enable LASSERT, LASSERTF])
  34 AC_ARG_ENABLE([libcfs_assert],
  35         AS_HELP_STRING([--disable-libcfs-assert],
  36                 [disable libcfs LASSERT, LASSERTF]),
  37         [], [enable_libcfs_assert="yes"])
  38 AC_MSG_RESULT([$enable_libcfs_assert])
  39 AS_IF([test x$enable_libcfs_assert = xyes], [
  40         AC_DEFINE(LIBCFS_DEBUG, 1, [enable libcfs LASSERT, LASSERTF])
  41         AC_SUBST(ENABLE_LIBCFS_ASSERT, yes)
  42 ], [
  43         AC_SUBST(ENABLE_LIBCFS_ASSERT, no)
  44 ])
  45 ]) # LIBCFS_CONFIG_CDEBUG
  46
  47 #
  48 # LIBCFS_CONFIG_PANIC_DUMPLOG
  49 #
  50 # check if tunable panic_dumplog is wanted
  51 #
  52 AC_DEFUN([LIBCFS_CONFIG_PANIC_DUMPLOG], [
  53 AC_MSG_CHECKING([whether to use tunable 'panic_dumplog' support])
  54 AC_ARG_ENABLE([panic_dumplog],
  55         AS_HELP_STRING([--enable-panic_dumplog],
  56                 [enable panic_dumplog]),
  57         [], [enable_panic_dumplog="no"])
  58 AC_MSG_RESULT([$enable_panic_dumplog])
  59 AS_IF([test "x$enable_panic_dumplog" = xyes], [
  60         AC_DEFINE(LNET_DUMP_ON_PANIC, 1, [use dumplog on panic])
  61         AC_SUBST(ENABLE_PANIC_DUMPLOG, yes)
  62 ], [
  63         AC_SUBST(ENABLE_PANIC_DUMPLOG, no)
  64 ])
  65 ]) # LIBCFS_CONFIG_PANIC_DUMPLOG
  66
  67 #
  68 # Kernel version 3.11 introduced ktime_get_ts64
  69 #
  70 AC_DEFUN([LIBCFS_SRC_KTIME_GET_TS64], [
  71         LB2_LINUX_TEST_SRC([ktime_get_ts64], [
  72                 #include <linux/hrtimer.h>
  73                 #include <linux/ktime.h>
  74         ],[
  75                 struct timespec64 *ts = NULL;
  76
  77                 ktime_get_ts64(ts);
  78         ])
  79 ])
  80 AC_DEFUN([LIBCFS_KTIME_GET_TS64], [
  81         AC_MSG_CHECKING([does function 'ktime_get_ts64' exist])
  82         LB2_LINUX_TEST_RESULT([ktime_get_ts64], [
  83                 AC_DEFINE(HAVE_KTIME_GET_TS64, 1,
  84                         ['ktime_get_ts64' is available])
  85         ])
  86 ]) # LIBCFS_KTIME_GET_TS64
  87
  88 #
  89 # Kernel version 3.12-rc4 commit c2d816443ef30 added prepare_to_wait_event()
  90 #
  91 AC_DEFUN([LIBCFS_SRC_PREPARE_TO_WAIT_EVENT],[
  92         LB2_LINUX_TEST_SRC([prepare_to_wait_event], [
  93                 #include <linux/wait.h>
  94         ],[
  95                 prepare_to_wait_event(NULL, NULL, 0);
  96         ])
  97 ])
  98 AC_DEFUN([LIBCFS_PREPARE_TO_WAIT_EVENT],[
  99         AC_MSG_CHECKING([does function 'prepare_to_wait_event' exist])
 100         LB2_LINUX_TEST_RESULT([prepare_to_wait_event], [
 101                 AC_DEFINE(HAVE_PREPARE_TO_WAIT_EVENT, 1,
 102                         ['prepare_to_wait_event' is available])
 103         ])
 104 ]) # LIBCFS_PREPARE_TO_WAIT_EVENT
 105
 106 #
 107 # Linux kernel 3.12 introduced struct kernel_param_ops
 108 # This has been backported to all lustre supported
 109 # clients except RHEL6. We have to handle the differences.
 110 #
 111 AC_DEFUN([LIBCFS_SRC_KERNEL_PARAM_OPS],[
 112         LB2_LINUX_TEST_SRC([kernel_param_ops], [
 113                 #include <linux/module.h>
 114         ],[
 115                 struct kernel_param_ops ops;
 116
 117                 ops.set = NULL;
 118         ])
 119 ])
 120 AC_DEFUN([LIBCFS_KERNEL_PARAM_OPS],[
 121         AC_MSG_CHECKING([does 'struct kernel_param_ops' exist])
 122         LB2_LINUX_TEST_RESULT([kernel_param_ops], [
 123                 AC_DEFINE(HAVE_KERNEL_PARAM_OPS, 1,
 124                         ['struct kernel_param_ops' is available])
 125         ])
 126 ]) # LIBCFS_KERNEL_PARAM_OPS
 127
 128 #
 129 # Kernel version 3.12 introduced ktime_add
 130 #
 131 AC_DEFUN([LIBCFS_SRC_KTIME_ADD],[
 132         LB2_LINUX_TEST_SRC([ktime_add], [
 133                 #include <linux/hrtimer.h>
 134                 #include <linux/ktime.h>
 135         ],[
 136                 ktime_t start = ktime_set(0, 0);
 137                 ktime_t end = start;
 138                 ktime_t total;
 139
 140                 total = ktime_add(start, end);
 141         ])
 142 ])
 143 AC_DEFUN([LIBCFS_KTIME_ADD],[
 144         AC_MSG_CHECKING([does function 'ktime_add' exist])
 145         LB2_LINUX_TEST_RESULT([ktime_add], [
 146                 AC_DEFINE(HAVE_KTIME_ADD, 1, [ktime_add is available])
 147         ])
 148 ]) # LIBCFS_KTIME_ADD
 149
 150 #
 151 # Kernel version 3.12 introduced ktime_after
 152 #
 153 AC_DEFUN([LIBCFS_SRC_KTIME_AFTER],[
 154         LB2_LINUX_TEST_SRC([ktime_after], [
 155                 #include <linux/hrtimer.h>
 156                 #include <linux/ktime.h>
 157         ],[
 158                 ktime_t start = ktime_set(0, 0);
 159                 ktime_t end = start;
 160
 161                 ktime_after(start, end);
 162         ])
 163 ])
 164 AC_DEFUN([LIBCFS_KTIME_AFTER],[
 165         AC_MSG_CHECKING([does function 'ktime_after' exist])
 166         LB2_LINUX_TEST_RESULT([ktime_after], [
 167                 AC_DEFINE(HAVE_KTIME_AFTER, 1, [ktime_after is available])
 168         ])
 169 ]) # LIBCFS_KTIME_AFTER
 170
 171 #
 172 # Kernel version 3.12 introduced ktime_before
 173 # See linux commit 67cb9366ff5f99868100198efba5ca88aaa6ad25
 174 #
 175 AC_DEFUN([LIBCFS_SRC_KTIME_BEFORE],[
 176         LB2_LINUX_TEST_SRC([ktime_before], [
 177                 #include <linux/hrtimer.h>
 178                 #include <linux/ktime.h>
 179         ],[
 180                 ktime_t start = ktime_set(0, 0);
 181                 ktime_t end = start;
 182
 183                 ktime_before(start, end);
 184         ])
 185 ])
 186 AC_DEFUN([LIBCFS_KTIME_BEFORE],[
 187         AC_MSG_CHECKING([does function 'ktime_before' exist])
 188         LB2_LINUX_TEST_RESULT([ktime_before], [
 189                 AC_DEFINE(HAVE_KTIME_BEFORE, 1, [ktime_before is available])
 190         ])
 191 ]) # LIBCFS_KTIME_BEFORE
 192
 193 #
 194 # Kernel version 3.12 introduced ktime_compare
 195 #
 196 AC_DEFUN([LIBCFS_SRC_KTIME_COMPARE],[
 197         LB2_LINUX_TEST_SRC([ktime_compare], [
 198                 #include <linux/hrtimer.h>
 199                 #include <linux/ktime.h>
 200         ],[
 201                 ktime_t start = ktime_set(0, 0);
 202                 ktime_t end = start;
 203
 204                 ktime_compare(start, end);
 205         ])
 206 ])
 207 AC_DEFUN([LIBCFS_KTIME_COMPARE],[
 208         AC_MSG_CHECKING([does function 'ktime_compare' exist])
 209         LB2_LINUX_TEST_RESULT([ktime_compare], [
 210                 AC_DEFINE(HAVE_KTIME_COMPARE, 1,
 211                         [ktime_compare is available])
 212         ])
 213 ]) # LIBCFS_KTIME_COMPARE
 214
 215 #
 216 # FC19 3.12 kernel struct shrinker change
 217 #
 218 AC_DEFUN([LIBCFS_SRC_SHRINKER_COUNT],[
 219         LB2_LINUX_TEST_SRC([shrinker_count_objects], [
 220                 #include <linux/mmzone.h>
 221                 #include <linux/shrinker.h>
 222         ],[
 223                 struct shrinker shrinker;
 224
 225                 shrinker.count_objects = NULL;
 226         ])
 227 ])
 228 AC_DEFUN([LIBCFS_SHRINKER_COUNT],[
 229         AC_MSG_CHECKING([shrinker has 'count_objects'])
 230         LB2_LINUX_TEST_RESULT([shrinker_count_objects], [
 231                 AC_DEFINE(HAVE_SHRINKER_COUNT, 1,
 232                         [shrinker has count_objects member])
 233         ])
 234 ]) # LIBCFS_SHRINKER_COUNT
 235
 236 #
 237 # Kernel version 3.13 commit aace05097a0fd467230e39acb148be0fdaa90068
 238 # add match_wildcard() function.
 239 #
 240 AC_DEFUN([LIBCFS_SRC_MATCH_WILDCARD],[
 241         LB2_LINUX_TEST_SRC([match_wildcard], [
 242                 #include <linux/parser.h>
 243         ],[
 244                 bool match;
 245
 246                 match = match_wildcard(NULL, NULL);
 247         ])
 248 ])
 249 AC_DEFUN([LIBCFS_MATCH_WILDCARD],[
 250         AC_MSG_CHECKING([does function 'match_wildcard' exist])
 251         LB2_LINUX_TEST_RESULT([match_wildcard], [
 252                 AC_DEFINE(HAVE_MATCH_WILDCARD, 1,
 253                         [match_wildcard() is available])
 254         ])
 255 ]) # LIBCFS_MATCH_WILDCARD
 256
 257 #
 258 # LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
 259 #
 260 # v3.14-7405-g91b0abe36a7b added AS_EXITING flag with
 261 # mapping_exiting() and mapping_set_exiting()
 262 #
 263 AC_DEFUN([LIBCFS_SRC_HAVE_MAPPING_AS_EXITING_FLAG], [
 264 m4_pattern_allow([AS_EXITING])
 265         LB2_LINUX_TEST_SRC([mapping_exiting_exists], [
 266                 #include <linux/pagemap.h>
 267         ],[
 268                 enum mapping_flags flag = AS_EXITING;
 269                 (void)flag;
 270         ],[-Werror])
 271 ])
 272 AC_DEFUN([LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG], [
 273         AC_MSG_CHECKING([if enum mapping_flags has AS_EXITING flag])
 274         LB2_LINUX_TEST_RESULT([mapping_exiting_exists], [
 275                 AC_DEFINE(HAVE_MAPPING_AS_EXITING_FLAG, 1,
 276                         [enum mapping_flags has AS_EXITING flag])
 277         ])
 278 ]) # LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
 279
 280 #
 281 # LIBCFS_IOV_ITER_HAS_TYPE
 282 #
 283 # kernel 3.15-rc4 commit 71d8e532b1549a478e6a6a8a44f309d050294d00
 284 # start adding the tag to iov_iter
 285 #
 286 AC_DEFUN([LIBCFS_SRC_IOV_ITER_HAS_TYPE], [
 287         LB2_LINUX_TEST_SRC([iov_iter_has_type_member], [
 288                 #include <linux/uio.h>
 289         ],[
 290                 struct iov_iter iter = { .type = ITER_KVEC };
 291                 (void)iter;
 292         ],
 293         [-Werror])
 294 ])
 295 AC_DEFUN([LIBCFS_IOV_ITER_HAS_TYPE], [
 296         AC_MSG_CHECKING([if iov_iter has member type])
 297         LB2_LINUX_TEST_RESULT([iov_iter_has_type_member], [
 298                 AC_DEFINE(HAVE_IOV_ITER_HAS_TYPE_MEMBER, 1,
 299                         [if iov_iter has member type])
 300         ])
 301 ]) # LIBCFS_IOV_ITER_HAS_TYPE
 302
 303 #
 304 # LIBCFS_HAVE_NS_TO_TIMESPEC64
 305 #
 306 # Kernel version 3.16-rc3 commit a84d1169164b274f13b97a23ff235c000efe3b49
 307 # introduced struct __kernel_old_timeval
 308 #
 309 AC_DEFUN([LIBCFS_SRC_HAVE_NS_TO_TIMESPEC64],[
 310         LB2_LINUX_TEST_SRC([kernel_old_timeval], [
 311                 #include <linux/time.h>
 312         ],[
 313                 struct timespec64 kts;
 314
 315                 kts = ns_to_timespec64(0);
 316         ])
 317 ])
 318 AC_DEFUN([LIBCFS_HAVE_NS_TO_TIMESPEC64],[
 319         AC_MSG_CHECKING([does 'ns_to_timespec64()' exist])
 320         LB2_LINUX_TEST_RESULT([kernel_old_timeval], [
 321                 AC_DEFINE(HAVE_NS_TO_TIMESPEC64, 1,
 322                         [ns_to_timespec64() is available])
 323         ])
 324 ]) # LIBCFS_HAVE_NS_TO_TIMESPEC64
 325
 326 #
 327 # LIBCFS_HAVE_GLOB
 328 #
 329 # Kernel version 3.16 commit b01250856b25f4417c51aa33afc451fbf7da1484
 330 # added glob support to the Linux kernel
 331 #
 332 AC_DEFUN([LIBCFS_SRC_HAVE_GLOB],[
 333         LB2_LINUX_TEST_SRC([glob_match], [
 334                 #include <linux/glob.h>
 335         ],[
 336                 return glob_match(NULL, NULL);
 337         ],[-Werror])
 338 ])
 339 AC_DEFUN([LIBCFS_HAVE_GLOB],[
 340         AC_MSG_CHECKING([does 'glob_match()' exist])
 341         LB2_LINUX_TEST_RESULT([glob_match], [
 342                 AC_DEFINE(HAVE_GLOB, 1,
 343                         [glob_match() is available])
 344         ])
 345 ]) # LIBCFS_HAVE_GLOB
 346
 347 #
 348 # Kernel version 3.17 changed hlist_add_after to
 349 # hlist_add_behind
 350 #
 351 AC_DEFUN([LIBCFS_SRC_HLIST_ADD_AFTER],[
 352         LB2_LINUX_TEST_SRC([hlist_add_after], [
 353                 #include <linux/list.h>
 354         ],[
 355                 hlist_add_after(NULL, NULL);
 356         ])
 357 ])
 358 AC_DEFUN([LIBCFS_HLIST_ADD_AFTER],[
 359         AC_MSG_CHECKING([does function 'hlist_add_after' exist])
 360         LB2_LINUX_TEST_RESULT([hlist_add_after], [
 361                 AC_DEFINE(HAVE_HLIST_ADD_AFTER, 1,
 362                         [hlist_add_after is available])
 363         ])
 364 ]) # LIBCFS_HLIST_ADD_AFTER
 365
 366 #
 367 # Kernel version 3.17 introduced struct timespec64
 368 #
 369 AC_DEFUN([LIBCFS_SRC_TIMESPEC64],[
 370         LB2_LINUX_TEST_SRC([timespec64], [
 371                 #include <linux/time.h>
 372         ],[
 373                 struct timespec64 ts;
 374
 375                 ts.tv_sec = 0;
 376                 ts.tv_nsec = 0;
 377         ])
 378 ])
 379 AC_DEFUN([LIBCFS_TIMESPEC64],[
 380         AC_MSG_CHECKING([does 'struct timespec64' exist])
 381         LB2_LINUX_TEST_RESULT([timespec64], [
 382                 AC_DEFINE(HAVE_TIMESPEC64, 1,
 383                         ['struct timespec64' is available])
 384         ])
 385 ]) # LIBCFS_TIMESPEC64
 386
 387 #
 388 # Kernel version 3.17 introduced ktime_get_real_ts64
 389 #
 390 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_TS64],[
 391         LB2_LINUX_TEST_SRC([ktime_get_real_ts64], [
 392                 #include <linux/ktime.h>
 393         ],[
 394                 struct timespec64 *ts = NULL;
 395
 396                 ktime_get_real_ts64(ts);
 397         ])
 398 ])
 399 AC_DEFUN([LIBCFS_KTIME_GET_REAL_TS64],[
 400         AC_MSG_CHECKING([does function 'ktime_get_real_ts64' exist])
 401         LB2_LINUX_TEST_RESULT([ktime_get_real_ts64], [
 402                 AC_DEFINE(HAVE_KTIME_GET_REAL_TS64, 1,
 403                         ['ktime_get_real_ts64' is available])
 404         ])
 405 ]) # LIBCFS_KTIME_GET_REAL_TS64
 406
 407 #
 408 # Kernel version 3.17 introduced ktime_get_real_seconds
 409 #
 410 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_SECONDS],[
 411         LB2_LINUX_TEST_SRC([ktime_get_real_seconds], [
 412                 #include <linux/hrtimer.h>
 413                 #include <linux/ktime.h>
 414         ],[
 415                 time64_t now;
 416
 417                 now = ktime_get_real_seconds();
 418         ])
 419 ])
 420 AC_DEFUN([LIBCFS_KTIME_GET_REAL_SECONDS],[
 421         AC_MSG_CHECKING([does function 'ktime_get_real_ts64' exist])
 422         LB2_LINUX_TEST_RESULT([ktime_get_real_seconds], [
 423                 AC_DEFINE(HAVE_KTIME_GET_REAL_SECONDS, 1,
 424                         ['ktime_get_real_seconds' is available])
 425         ])
 426 ]) # LIBCFS_KTIME_GET_REAL_SECONDS
 427
 428 #
 429 # Kernel version 3.17 created ktime_get_ns wrapper
 430 #
 431 AC_DEFUN([LIBCFS_SRC_KTIME_GET_NS],[
 432         LB2_LINUX_TEST_SRC([ktime_get_ns], [
 433                 #include <linux/hrtimer.h>
 434                 #include <linux/ktime.h>
 435         ],[
 436                 u64 nanoseconds;
 437
 438                 nanoseconds = ktime_get_ns();
 439         ])
 440 ])
 441 AC_DEFUN([LIBCFS_KTIME_GET_NS],[
 442         AC_MSG_CHECKING([does function 'ktime_get_ns' exist])
 443         LB2_LINUX_TEST_RESULT([ktime_get_ns], [],[
 444                 AC_DEFINE(NEED_KTIME_GET_NS, 1,
 445                         ['ktime_get_ns' is not available])
 446         ])
 447 ]) # LIBCFS_KTIME_GET_NS
 448
 449 #
 450 # Kernel version 3.17 created ktime_get_real_ns wrapper
 451 #
 452 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_NS],[
 453         LB2_LINUX_TEST_SRC([ktime_get_real_ns], [
 454                 #include <linux/hrtimer.h>
 455                 #include <linux/ktime.h>
 456         ],[
 457                 u64 nanoseconds;
 458
 459                 nanoseconds = ktime_get_real_ns();
 460         ])
 461 ])
 462 AC_DEFUN([LIBCFS_KTIME_GET_REAL_NS],[
 463         AC_MSG_CHECKING([does function 'ktime_get_real_ns' exist])
 464         LB2_LINUX_TEST_RESULT([ktime_get_real_ns], [],[
 465                 AC_DEFINE(NEED_KTIME_GET_REAL_NS, 1,
 466                         ['ktime_get_real_ns' is not available])
 467         ])
 468 ]) # LIBCFS_KTIME_GET_REAL_NS
 469
 470 #
 471 # Kernel version 3.17 introduced ktime_to_timespec64
 472 #
 473 AC_DEFUN([LIBCFS_SRC_KTIME_TO_TIMESPEC64],[
 474         LB2_LINUX_TEST_SRC([ktime_to_timespec64], [
 475                 #include <linux/hrtimer.h>
 476                 #include <linux/ktime.h>
 477         ],[
 478                 ktime_t now = ktime_set(0, 0);
 479                 struct timespec64 ts;
 480
 481                 ts = ktime_to_timespec64(now);
 482         ])
 483 ])
 484 AC_DEFUN([LIBCFS_KTIME_TO_TIMESPEC64],[
 485         AC_MSG_CHECKING([does function 'ktime_to_timespec64' exist])
 486         LB2_LINUX_TEST_RESULT([ktime_to_timespec64], [
 487                 AC_DEFINE(HAVE_KTIME_TO_TIMESPEC64, 1,
 488                         ['ktime_to_timespec64' is available])
 489         ])
 490 ]) # LIBCFS_KTIME_TO_TIMESPEC64
 491
 492 #
 493 # Kernel version 3.17 introduced timespec64_sub
 494 #
 495 AC_DEFUN([LIBCFS_SRC_TIMESPEC64_SUB],[
 496         LB2_LINUX_TEST_SRC([timespec64_sub], [
 497                 #include <linux/time.h>
 498         ],[
 499                 struct timespec64 later = { }, earlier = { }, diff;
 500
 501                 diff = timespec64_sub(later, earlier);
 502         ])
 503 ])
 504 AC_DEFUN([LIBCFS_TIMESPEC64_SUB],[
 505         AC_MSG_CHECKING([does function 'timespec64_sub' exist])
 506         LB2_LINUX_TEST_RESULT([timespec64_sub], [
 507                 AC_DEFINE(HAVE_TIMESPEC64_SUB, 1,
 508                         ['timespec64_sub' is available])
 509         ])
 510 ]) # LIBCFS_TIMESPEC64_SUB
 511
 512 #
 513 # Kernel version 3.17 introduced timespec64_to_ktime
 514 #
 515 AC_DEFUN([LIBCFS_SRC_TIMESPEC64_TO_KTIME],[
 516         LB2_LINUX_TEST_SRC([timespec64_to_ktime], [
 517         #include <linux/ktime.h>
 518         ],[
 519                 struct timespec64 ts;
 520                 ktime_t now;
 521
 522                 now = timespec64_to_ktime(ts);
 523         ])
 524 ])
 525 AC_DEFUN([LIBCFS_TIMESPEC64_TO_KTIME],[
 526         AC_MSG_CHECKING([does function 'timespec64_to_ktime' exist])
 527         LB2_LINUX_TEST_RESULT([timespec64_to_ktime], [
 528                 AC_DEFINE(HAVE_TIMESPEC64_TO_KTIME, 1,
 529                         ['timespec64_to_ktime' is available])
 530         ])
 531 ]) # LIBCFS_TIMESPEC64_TO_KTIME
 532
 533 #
 534 # Kernel version 3.19 introduced ktime_get_seconds
 535 #
 536 AC_DEFUN([LIBCFS_SRC_KTIME_GET_SECONDS],[
 537         LB2_LINUX_TEST_SRC([ktime_get_seconds], [
 538                 #include <linux/ktime.h>
 539         ],[
 540                 time64_t now;
 541
 542                 now = ktime_get_seconds();
 543         ])
 544 ])
 545 AC_DEFUN([LIBCFS_KTIME_GET_SECONDS],[
 546         AC_MSG_CHECKING([does function 'ktime_get_seconds' exist])
 547         LB2_LINUX_TEST_RESULT([ktime_get_seconds], [
 548                 AC_DEFINE(HAVE_KTIME_GET_SECONDS, 1,
 549                         ['ktime_get_seconds' is available])
 550         ])
 551 ]) # LIBCFS_KTIME_GET_SECONDS
 552
 553 #
 554 # Kernel version 3.19 commit v3.18-rc2-26-g61ada528dea0
 555 # introduce wait_woken()
 556 #
 557 AC_DEFUN([LIBCFS_SRC_WAIT_WOKEN],[
 558         LB2_LINUX_TEST_SRC([wait_woken], [
 559                 #include <linux/wait.h>
 560         ],[
 561                 wait_woken(NULL, 0, 0);
 562         ])
 563 ])
 564 AC_DEFUN([LIBCFS_WAIT_WOKEN],[
 565         AC_MSG_CHECKING([does function 'wait_woken' exist])
 566         LB2_LINUX_TEST_RESULT([wait_woken], [
 567                 AC_DEFINE(HAVE_WAIT_WOKEN, 1,
 568                         ['wait_woken, is available'])
 569         ])
 570 ]) # LIBCFS_WAIT_WOKEN
 571
 572 #
 573 # Kernel version 4.0 commit 41fbf3b39d5eca01527338b4d0ee15ee1ae1023c
 574 # introduced the helper function ktime_ms_delta.
 575 #
 576 AC_DEFUN([LIBCFS_SRC_KTIME_MS_DELTA],[
 577         LB2_LINUX_TEST_SRC([ktime_ms_delta], [
 578                 #include <linux/ktime.h>
 579         ],[
 580                 ktime_t start = ktime_set(0, 0);
 581                 ktime_t end = start;
 582
 583                 ktime_ms_delta(start, end);
 584         ])
 585 ])
 586 AC_DEFUN([LIBCFS_KTIME_MS_DELTA],[
 587         AC_MSG_CHECKING([does function 'ktime_ms_delta' exist])
 588         LB2_LINUX_TEST_RESULT([ktime_ms_delta], [
 589                 AC_DEFINE(HAVE_KTIME_MS_DELTA, 1,
 590                         ['ktime_ms_delta' is available])
 591         ])
 592 ]) # LIBCFS_KTIME_MS_DELTA
 593
 594 #
 595 # Kernel version 4.1 commit b51d23e4e9fea6f264d39535c2a62d1f51e7ccc3
 596 # create per module locks which added kernel_param_[un]lock(). Older
 597 # kernels you have to use __kernel_param_[un]lock(). In that case its
 598 # a global lock for all modules but that is okay since its a rare event.
 599 #
 600 AC_DEFUN([LIBCFS_SRC_KERNEL_PARAM_LOCK],[
 601         LB2_LINUX_TEST_SRC([kernel_param_lock], [
 602                 #include <linux/moduleparam.h>
 603         ],[
 604                 kernel_param_lock(NULL);
 605                 kernel_param_unlock(NULL);
 606         ])
 607 ])
 608 AC_DEFUN([LIBCFS_KERNEL_PARAM_LOCK],[
 609         AC_MSG_CHECKING([does function 'kernel_param_[un]lock' exist])
 610         LB2_LINUX_TEST_RESULT([kernel_param_lock], [
 611                 AC_DEFINE(HAVE_KERNEL_PARAM_LOCK, 1,
 612                         ['kernel_param_[un]lock' is available])
 613         ])
 614 ]) # LIBCFS_KERNEL_PARAM_LOCK
 615
 616 #
 617 # LIBCFS_STRSCPY_EXISTS
 618 #
 619 # Linux commit v4.2-rc1-2-g30035e45753b
 620 #  string: provide strscpy()
 621 #
 622 # If strscpy exists, prefer it over strlcpy
 623 #
 624 AC_DEFUN([LIBCFS_SRC_STRSCPY_EXISTS], [
 625         LB2_LINUX_TEST_SRC([strscpy_exists], [
 626                 #include <linux/string.h>
 627         ],[
 628                 strscpy((char *)NULL, (const char *)NULL, 0);
 629         ],[-Werror])
 630 ])
 631 AC_DEFUN([LIBCFS_STRSCPY_EXISTS], [
 632         AC_MSG_CHECKING([if kernel strscpy is available])
 633         LB2_LINUX_TEST_RESULT([strscpy_exists], [
 634                 AC_DEFINE(HAVE_STRSCPY, 1,
 635                         [kernel strscpy is available])
 636         ])
 637 ]) # LIBCFS_STRSCPY_EXISTS
 638
 639 #
 640 # Kernel version 4.2 changed topology_thread_cpumask
 641 # to topology_sibling_cpumask
 642 #
 643 AC_DEFUN([LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 644         LB2_LINUX_TEST_SRC([topology_sibling_cpumask], [
 645                 #include <linux/topology.h>
 646         ],[
 647                 const struct cpumask *mask;
 648
 649                 mask = topology_sibling_cpumask(0);
 650         ])
 651 ])
 652 AC_DEFUN([LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 653         AC_MSG_CHECKING([does function 'topology_sibling_cpumask' exist])
 654         LB2_LINUX_TEST_RESULT([topology_sibling_cpumask], [
 655                 AC_DEFINE(HAVE_TOPOLOGY_SIBLING_CPUMASK, 1,
 656                         [topology_sibling_cpumask is available])
 657         ])
 658 ]) # LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
 659
 660 #
 661 # Kernel version 4.4 commit ef951599074ba4fad2d0efa0a977129b41e6d203
 662 # introduced kstrtobool and kstrtobool_from_user.
 663 #
 664 AC_DEFUN([LIBCFS_SRC_KSTRTOBOOL_FROM_USER], [
 665         LB2_LINUX_TEST_SRC([kstrtobool_from_user], [
 666                 #include <linux/kernel.h>
 667         ],[
 668                 bool result;
 669                 return kstrtobool_from_user(NULL, 0, &result);
 670         ])
 671 ])
 672 AC_DEFUN([LIBCFS_KSTRTOBOOL_FROM_USER], [
 673         AC_MSG_CHECKING([if Linux kernel has 'kstrtobool_from_user'])
 674         LB2_LINUX_TEST_RESULT([kstrtobool_from_user], [
 675                 AC_DEFINE(HAVE_KSTRTOBOOL_FROM_USER, 1,
 676                         [kernel has kstrtobool_from_user])
 677         ])
 678 ]) # LIBCFS_KSTRTOBOOL_FROM_USER
 679
 680 #
 681 # LIBCFS_NETLINK_CALLBACK_START
 682 #
 683 # Kernel version 4.4-rc3 commit fc9e50f5a5a4e1fa9ba2756f745a13e693cf6a06
 684 # added a start function callback for struct netlink_callback
 685 #
 686 AC_DEFUN([LIBCFS_SRC_NETLINK_CALLBACK_START], [
 687         LB2_LINUX_TEST_SRC([cb_start], [
 688                 #include <net/genetlink.h>
 689         ],[
 690                 struct genl_ops ops;
 691
 692                 ops.start = NULL;
 693         ],[])
 694 ])
 695 AC_DEFUN([LIBCFS_NETLINK_CALLBACK_START], [
 696         AC_MSG_CHECKING([if struct genl_ops has start callback])
 697         LB2_LINUX_TEST_RESULT([cb_start], [
 698                 AC_DEFINE(HAVE_NETLINK_CALLBACK_START, 1,
 699                         [struct genl_ops has 'start' callback])
 700         ])
 701 ]) # LIBCFS_NETLINK_CALLBACK_START
 702
 703 #
 704 # Kernel version 4.5-rc1 commit d12481bc58fba89427565f8592e88446ec084a24
 705 # added crypto hash helpers
 706 #
 707 AC_DEFUN([LIBCFS_SRC_CRYPTO_HASH_HELPERS], [
 708         LB2_LINUX_TEST_SRC([crypto_hash_helpers], [
 709                 #include <crypto/hash.h>
 710         ],[
 711                 crypto_ahash_alg_name(NULL);
 712                 crypto_ahash_driver_name(NULL);
 713         ])
 714 ])
 715 AC_DEFUN([LIBCFS_CRYPTO_HASH_HELPERS], [
 716         AC_MSG_CHECKING([does crypto hash helper functions exist])
 717         LB2_LINUX_TEST_RESULT([crypto_hash_helpers], [
 718                 AC_DEFINE(HAVE_CRYPTO_HASH_HELPERS, 1,
 719                         [crypto hash helper functions are available])
 720         ])
 721 ]) # LIBCFS_CRYPTO_HASH_HELPERS
 722
 723 #
 724 # Kernel version 4.5-rc1 commit 3502cad73c4bbf8f6365d539e814159275252c59
 725 # introduced rhashtable_replace_fast
 726 #
 727 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_REPLACE], [
 728         LB2_LINUX_TEST_SRC([rhashtable_replace_fast], [
 729                 #include <linux/rhashtable.h>
 730         ],[
 731                 const struct rhashtable_params params = { 0 };
 732
 733                 rhashtable_replace_fast(NULL, NULL, NULL, params);
 734         ])
 735 ])
 736 AC_DEFUN([LIBCFS_RHASHTABLE_REPLACE], [
 737         AC_MSG_CHECKING([if 'rhashtable_replace_fast' exists])
 738         LB2_LINUX_TEST_RESULT([rhashtable_replace_fast], [
 739                 AC_DEFINE(HAVE_RHASHTABLE_REPLACE, 1,
 740                         [rhashtable_replace_fast() is available])
 741         ])
 742 ]) # LIBCFS_RHASHTABLE_REPLACE
 743
 744 #
 745 # Kernel version 4.5-rc3 commit 2fe829aca9d7bed5fd6b49c6a1452e5e486b6cc3dd
 746 # made kset_find_obj() exportable to modules
 747 #
 748 AC_DEFUN([LIBCFS_EXPORT_KSET_FIND_OBJ], [
 749 LB_CHECK_EXPORT([kset_find_obj], [lib/kobject.c],
 750         [AC_DEFINE(HAVE_KSET_FIND_OBJ, 1,
 751                 [kset_find_obj is exported by the kernel])])
 752 ]) # LIBCFS_EXPORT_KSET_FIND_OBJ
 753
 754 #
 755 # Kernel version 4.6+ commit ef703f49a6c5b909a85149bb6625c4ed0d697186
 756 # fixed the brokenness of hash_64(). The fix removed GOLDEN_RATIO_PRIME_64
 757 # since it was a poor prime value.
 758 #
 759 AC_DEFUN([LIBCFS_SRC_BROKEN_HASH_64], [
 760         LB2_LINUX_TEST_SRC([broken_hash_64], [
 761         #include <linux/hash.h>
 762         ],[
 763                 int tmp = GOLDEN_RATIO_PRIME_64;
 764         ])
 765 ])
 766 AC_DEFUN([LIBCFS_BROKEN_HASH_64], [
 767         AC_MSG_CHECKING([kernel has fixed hash_64()])
 768         LB2_LINUX_TEST_RESULT([broken_hash_64], [
 769                 AC_DEFINE(HAVE_BROKEN_HASH_64, 1, [kernel hash_64() is broken])
 770         ])
 771 ]) # LIBCFS_BROKEN_HASH_64
 772
 773 #
 774 # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 775 #
 776 # linux 4.6 kernel changed stacktrace_ops address to return an int
 777 #
 778 AC_DEFUN([LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 779         LB2_LINUX_TEST_SRC([stacktrace_ops_address_return_int], [
 780                 #include <asm/stacktrace.h>
 781         ],[
 782                 int rc;
 783
 784                 rc = ((struct stacktrace_ops *)0)->address(NULL, 0, 0);
 785         ])
 786 ])
 787 AC_DEFUN([LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 788         AC_MSG_CHECKING([if 'struct stacktrace_ops' address function returns an int])
 789         LB2_LINUX_TEST_RESULT([stacktrace_ops_address_return_int], [
 790                 AC_DEFINE(STACKTRACE_OPS_ADDRESS_RETURN_INT, 1,
 791                         ['struct stacktrace_ops' address function returns an int])
 792         ])
 793 ]) # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 794
 795 #
 796 # Kernel version 4.6 removed both struct task_struct and struct mm_struct
 797 # arguments to get_user_pages
 798 #
 799 AC_DEFUN([LIBCFS_SRC_GET_USER_PAGES_6ARG], [
 800         LB2_LINUX_TEST_SRC([get_user_pages_6arg], [
 801                 #include <linux/mm.h>
 802         ],[
 803                 int rc;
 804
 805                 rc = get_user_pages(0, 0, 0, 0, NULL, NULL);
 806         ])
 807 ])
 808 AC_DEFUN([LIBCFS_GET_USER_PAGES_6ARG], [
 809         AC_MSG_CHECKING([if 'get_user_pages()' takes 6 arguments])
 810         LB2_LINUX_TEST_RESULT([get_user_pages_6arg], [
 811                 AC_DEFINE(HAVE_GET_USER_PAGES_6ARG, 1,
 812                         [get_user_pages takes 6 arguments])
 813         ])
 814 ]) # LIBCFS_GET_USER_PAGES_6ARG
 815
 816 #
 817 # LIBCFS_STRINGHASH
 818 #
 819 # 4.6 kernel created stringhash.h which moved stuff out of dcache.h
 820 # commit f4bcbe792b8f434e32487cff9d9e30ab45a3ce02
 821 #
 822 AC_DEFUN([LIBCFS_SRC_STRINGHASH], [
 823         LB2_CHECK_LINUX_HEADER_SRC([linux/stringhash.h], [-Werror])
 824 ])
 825 AC_DEFUN([LIBCFS_STRINGHASH], [
 826         LB2_CHECK_LINUX_HEADER_RESULT([linux/stringhash.h], [
 827                 AC_DEFINE(HAVE_STRINGHASH, 1,
 828                         [stringhash.h is present])
 829         ])
 830 ]) # LIBCFS_STRINGHASH
 831
 832 #
 833 # LIBCFS_RHASHTABLE_INSERT_FAST
 834 #
 835 # 4.7+ kernel commit 5ca8cc5bf11faed257c762018aea9106d529232f
 836 # changed __rhashtable_insert_fast to support the new function
 837 # rhashtable_lookup_get_insert_key().
 838 #
 839 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_INSERT_FAST], [
 840         LB2_LINUX_TEST_SRC([rhashtable_insert_fast], [
 841                 #include <linux/rhashtable.h>
 842         ],[
 843                 const struct rhashtable_params params = { 0 };
 844                 int rc;
 845
 846                 rc = __rhashtable_insert_fast(NULL, NULL, NULL, params);
 847         ],
 848         [-Werror])
 849 ])
 850 AC_DEFUN([LIBCFS_RHASHTABLE_INSERT_FAST], [
 851         AC_MSG_CHECKING([if internal '__rhashtable_insert_fast()' returns int])
 852         LB2_LINUX_TEST_RESULT([rhashtable_insert_fast], [
 853                 AC_DEFINE(HAVE_HASHTABLE_INSERT_FAST_RETURN_INT, 1,
 854                           ['__rhashtable_insert_fast()' returns int])
 855         ])
 856 ]) # LIBCFS_RHASHTABLE_INSERT_FAST
 857
 858 #
 859 # Kernel version 4.7-rc1 commit 8f6fd83c6c5ec66a4a70c728535ddcdfef4f3697
 860 # added 3rd arg to rhashtable_walk_init
 861 #
 862 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG], [
 863         LB2_LINUX_TEST_SRC([rhashtable_walk_init], [
 864                 #include <linux/gfp.h>
 865                 #include <linux/rhashtable.h>
 866         ],[
 867                 rhashtable_walk_init(NULL, NULL, GFP_KERNEL);
 868         ])
 869 ])
 870 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_INIT_3ARG], [
 871         AC_MSG_CHECKING([if 'rhashtable_walk_init' has 3 args])
 872         LB2_LINUX_TEST_RESULT([rhashtable_walk_init], [
 873                 AC_DEFINE(HAVE_3ARG_RHASHTABLE_WALK_INIT, 1,
 874                         [rhashtable_walk_init() has 3 args])
 875         ])
 876 ]) # LIBCFS_RHASHTABLE_WALK_INIT_3ARG
 877
 878 #
 879 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 880 # introduced rhashtable_lookup
 881 #
 882 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_LOOKUP], [
 883         LB2_LINUX_TEST_SRC([rhashtable_lookup], [
 884                 #include <linux/rhashtable.h>
 885         ],[
 886                 const struct rhashtable_params params = { 0 };
 887                 void *ret;
 888
 889                 ret = rhashtable_lookup(NULL, NULL, params);
 890         ])
 891 ])
 892 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP], [
 893         AC_MSG_CHECKING([if 'rhashtable_lookup' exist])
 894         LB2_LINUX_TEST_RESULT([rhashtable_lookup], [
 895                 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP, 1,
 896                         [rhashtable_lookup() is available])
 897         ])
 898 ]) # LIBCFS_RHASHTABLE_LOOKUP
 899
 900 #
 901 # LIBCFS_RHLTABLE
 902 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 903 # created the rhlist interface to allow inserting duplicate objects
 904 # into the same table.
 905 #
 906 AC_DEFUN([LIBCFS_SRC_RHLTABLE], [
 907         LB2_LINUX_TEST_SRC([rhtable], [
 908                 #include <linux/rhashtable.h>
 909         ],[
 910                 struct rhltable *hlt = NULL;
 911
 912                 rhltable_destroy(hlt);
 913         ])
 914 ])
 915 AC_DEFUN([LIBCFS_RHLTABLE], [
 916         AC_MSG_CHECKING([does 'struct rhltable' exist])
 917         LB2_LINUX_TEST_RESULT([rhtable], [
 918                 AC_DEFINE(HAVE_RHLTABLE, 1, [struct rhltable exist])
 919         ])
 920 ]) # LIBCFS_RHLTABLE
 921
 922 #
 923 # LIBCFS_STACKTRACE_OPS
 924 #
 925 # Kernel version 4.8 commit c8fe4609827aedc9c4b45de80e7cdc8ccfa8541b
 926 # removed both struct stacktrace_ops and dump_trace() function
 927 #
 928 AC_DEFUN([LIBCFS_SRC_STACKTRACE_OPS], [
 929         LB2_LINUX_TEST_SRC([stacktrace_ops], [
 930                 struct task_struct;
 931                 struct pt_regs;
 932                 #include <asm/stacktrace.h>
 933         ],[
 934                 struct stacktrace_ops ops;
 935                 ops.stack = NULL;
 936         ])
 937 ])
 938 AC_DEFUN([LIBCFS_STACKTRACE_OPS], [
 939 AC_MSG_CHECKING([if 'struct stacktrace_ops' exists])
 940         LB2_LINUX_TEST_RESULT([stacktrace_ops], [
 941                 AC_DEFINE(HAVE_STACKTRACE_OPS, 1,
 942                         [struct stacktrace_ops exists])
 943         ])
 944 ]) # LIBCFS_STACKTRACE_OPS
 945
 946 #
 947 # LIBCFS_RHASHTABLE_WALK_ENTER
 948 #
 949 # Kernel version 4.9-rc1 commit 246779dd090bd1b74d2652b3a6ca7759f593b27a
 950 # introduced rhashtable_walk_enter
 951 #
 952 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_WALK_ENTER], [
 953         LB2_LINUX_TEST_SRC([rhashtable_walk_enter], [
 954                 #include <linux/rhashtable.h>
 955         ],[
 956                 rhashtable_walk_enter(NULL, NULL);
 957         ])
 958 ])
 959 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_ENTER], [
 960         AC_MSG_CHECKING([if 'rhashtable_walk_enter' exists])
 961         LB2_LINUX_TEST_RESULT([rhashtable_walk_enter], [
 962                 AC_DEFINE(HAVE_RHASHTABLE_WALK_ENTER, 1,
 963                         [rhashtable_walk_enter() is available])
 964         ])
 965 ]) # LIBCFS_RHASHTABLE_WALK_ENTER
 966
 967 #
 968 # Kernel version 4.9 commit 768ae309a96103ed02eb1e111e838c87854d8b51
 969 # mm: replace get_user_pages() write/force parameters with gup_flags
 970 #
 971 AC_DEFUN([LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS], [
 972         LB2_LINUX_TEST_SRC([get_user_pages_gup_flags], [
 973                 #include <linux/mm.h>
 974         ],[
 975                 int rc;
 976                 rc = get_user_pages(0, 0, FOLL_WRITE, NULL, NULL);
 977         ])
 978 ])
 979 AC_DEFUN([LIBCFS_GET_USER_PAGES_GUP_FLAGS], [
 980         AC_MSG_CHECKING([if 'get_user_pages()' takes gup_flags in arguments])
 981         LB2_LINUX_TEST_RESULT([get_user_pages_gup_flags], [
 982                 AC_DEFINE(HAVE_GET_USER_PAGES_GUP_FLAGS, 1,
 983                         [get_user_pages takes gup_flags in arguments])
 984                 ])
 985 ]) # LIBCFS_GET_USER_PAGES_GUP_FLAGS
 986
 987 #
 988 # Kernel version 4.10 commit 7b737965b33188bd3dbb44e938535c4006d97fbb
 989 # libcfs: Convert to hotplug state machine
 990 #
 991 AC_DEFUN([LIBCFS_SRC_HOTPLUG_STATE_MACHINE], [
 992         LB2_LINUX_TEST_SRC([cpu_hotplug_state_machine], [
 993                 #include <linux/cpuhotplug.h>
 994         ],[
 995                 cpuhp_remove_state(CPUHP_LUSTRE_CFS_DEAD);
 996         ])
 997 ])
 998 AC_DEFUN([LIBCFS_HOTPLUG_STATE_MACHINE], [
 999         AC_MSG_CHECKING([if libcfs supports CPU hotplug state machine])
1000         LB2_LINUX_TEST_RESULT([cpu_hotplug_state_machine], [
1001                 AC_DEFINE(HAVE_HOTPLUG_STATE_MACHINE, 1,
1002                         [hotplug state machine is supported])
1003         ])
1004 ]) # LIBCFS_HOTPLUG_STATE_MACHINE
1005
1006 #
1007 # LIBCFS_REFCOUNT_T
1008 #
1009 # Kernel version 4.10-rc3 commit f405df5de3170c00e5c54f8b7cf4766044a032ba
1010 # introduced refcount_t which is atomic_t plus over flow guards.
1011 #
1012 AC_DEFUN([LIBCFS_SRC_REFCOUNT_T], [
1013         LB2_CHECK_LINUX_HEADER_SRC([linux/refcount.h], [-Werror])
1014 ])
1015 AC_DEFUN([LIBCFS_REFCOUNT_T], [
1016         LB2_CHECK_LINUX_HEADER_RESULT([linux/refcount.h], [
1017                 AC_DEFINE(HAVE_REFCOUNT_T, 1,
1018                         [refcount_t is supported])
1019         ])
1020 ]) # LIBCFS_REFCOUNT_T
1021
1022 #
1023 # Kernel version 4.12 commit 499118e966f1d2150bd66647c8932343c4e9a0b8
1024 # introduce memalloc_noreclaim_{save,restore}
1025 #
1026 AC_DEFUN([LIBCFS_SRC_MEMALLOC_NORECLAIM], [
1027         LB2_LINUX_TEST_SRC([memalloc_noreclaim], [
1028                 #include <linux/sched/mm.h>
1029         ],[
1030                 int flag = memalloc_noreclaim_save();
1031                 memalloc_noreclaim_restore(flag);
1032         ])
1033 ])
1034 AC_DEFUN([LIBCFS_MEMALLOC_NORECLAIM], [
1035         AC_MSG_CHECKING([if memalloc_noreclaim_{save,restore} exist])
1036         LB2_LINUX_TEST_RESULT([memalloc_noreclaim], [
1037                 AC_DEFINE(HAVE_MEMALLOC_RECLAIM, 1,
1038                         [memalloc_noreclaim_{save,restore}() is supported])
1039         ])
1040 ]) # LIBCFS_MEMALLOC_NORECLAIM
1041
1042 #
1043 # LIBCFS_SCHED_HEADERS
1044 #
1045 # 4.11 has broken up sched.h into more headers.
1046 #
1047 AC_DEFUN([LIBCFS_SRC_SCHED_HEADERS], [
1048         LB2_CHECK_LINUX_HEADER_SRC([linux/sched/signal.h], [-Werror])
1049 ])
1050 AC_DEFUN([LIBCFS_SCHED_HEADERS], [
1051         LB2_CHECK_LINUX_HEADER_RESULT([linux/sched/signal.h], [
1052                 AC_DEFINE(HAVE_SCHED_HEADERS, 1,
1053                         [linux/sched header directory exist])
1054         ])
1055 ]) # LIBCFS_SCHED_HEADERS
1056
1057 #
1058 # Kernel version 4.11-rc1 commit 2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e
1059 # introduce kref_read
1060 #
1061 AC_DEFUN([LIBCFS_SRC_KREF_READ], [
1062         LB2_LINUX_TEST_SRC([kref_read], [
1063                 #include <linux/kref.h>
1064         ],[
1065                 kref_read(NULL);
1066         ])
1067 ])
1068 AC_DEFUN([LIBCFS_KREF_READ], [
1069         AC_MSG_CHECKING([if 'kref_read' exists])
1070         LB2_LINUX_TEST_RESULT([kref_read], [
1071                 AC_DEFINE(HAVE_KREF_READ, 1, [kref_read() is available])
1072         ])
1073 ]) # LIBCFS_KREF_READ
1074
1075 #
1076 # Kernel version 4.11-rc1 commit da20420f83ea0fbcf3d03afda08d971ea1d8a356
1077 # introduced rht_bucket_var
1078 #
1079 AC_DEFUN([LIBCFS_SRC_RHT_BUCKET_VAR], [
1080         LB2_LINUX_TEST_SRC([rht_bucket_var], [
1081                 #include <linux/rhashtable.h>
1082         ],[
1083                 rht_bucket_var(NULL, 0);
1084         ])
1085 ])
1086 AC_DEFUN([LIBCFS_RHT_BUCKET_VAR], [
1087         AC_MSG_CHECKING([if 'rht_bucket_var' exists])
1088         LB2_LINUX_TEST_RESULT([rht_bucket_var], [
1089                 AC_DEFINE(HAVE_RHT_BUCKET_VAR, 1,
1090                         [rht_bucket_var() is available])
1091         ])
1092 ]) # LIBCFS_RHT_BUCKET_VAR
1093
1094 #
1095 # Kernel version 4.11-rc5 commit fceb6435e85298f747fee938415057af837f5a8a
1096 # began the enhanchement of Netlink with extended ACK struct for advanced
1097 # error handling. By commit 7ab606d1609dd6dfeae9c8ad0a8a4e051d831e46 we
1098 # had full support for this new feature.
1099 #
1100 AC_DEFUN([LIBCFS_SRC_NL_EXT_ACK], [
1101         LB2_LINUX_TEST_SRC([netlink_ext_ack], [
1102                 #include <net/genetlink.h>
1103         ],[
1104                 struct genl_info info;
1105
1106                 info.extack = NULL;
1107         ])
1108 ])
1109 AC_DEFUN([LIBCFS_NL_EXT_ACK], [
1110         AC_MSG_CHECKING([if Netlink supports netlink_ext_ack])
1111         LB2_LINUX_TEST_RESULT([netlink_ext_ack], [
1112                 AC_DEFINE(HAVE_NL_PARSE_WITH_EXT_ACK, 1,
1113                         [netlink_ext_ack is an argument to nla_parse type function])
1114         ])
1115 ]) # LIBCFS_NL_EXT_ACK
1116
1117 #
1118 # Kernel version 4.11 commit f9fe1c12d126f9887441fa5bb165046f30ddd4b5
1119 # introduced rhashtable_lookup_get_insert_fast
1120 #
1121 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
1122         LB2_LINUX_TEST_SRC([rhashtable_lookup_get_insert_fast], [
1123                 #include <linux/rhashtable.h>
1124         ],[
1125                 const struct rhashtable_params params = { 0 };
1126                 void *ret;
1127
1128                 ret = rhashtable_lookup_get_insert_fast(NULL, NULL, params);
1129         ])
1130 ])
1131 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
1132         AC_MSG_CHECKING([if 'rhashtable_lookup_get_insert_fast' exist])
1133         LB2_LINUX_TEST_RESULT([rhashtable_lookup_get_insert_fast], [
1134                 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP_GET_INSERT_FAST, 1,
1135                         [rhashtable_lookup_get_insert_fast() is available])
1136         ])
1137 ]) # LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
1138
1139 #
1140 # Kernel version 4.12-rc2 8f553c498e1772cccb39a114da4a498d22992758
1141 # provide proper CPU hotplug locking
1142 #
1143 AC_DEFUN([LIBCFS_SRC_CPUS_READ_LOCK], [
1144         LB2_LINUX_TEST_SRC([cpu_read_lock], [
1145                 #include <linux/cpu.h>
1146         ],[
1147                 cpus_read_lock();
1148                 cpus_read_unlock();
1149         ])
1150 ])
1151 AC_DEFUN([LIBCFS_CPUS_READ_LOCK], [
1152         AC_MSG_CHECKING([if 'cpus_read_[un]lock' exist])
1153         LB2_LINUX_TEST_RESULT([cpu_read_lock], [
1154                 AC_DEFINE(HAVE_CPUS_READ_LOCK, 1, ['cpus_read_lock' exist])
1155         ])
1156 ]) # LIBCFS_CPUS_READ_LOCK
1157
1158 #
1159 # LIBCFS_HAVE_PROCESSOR_HEADER
1160 #
1161 # Kernel version 4.12-rc3 commit fd851a3cdc196bfc1d229b5f22369069af532bf8
1162 # introduce processor.h
1163 #
1164 AC_DEFUN([LIBCFS_SRC_HAVE_PROCESSOR_HEADER], [
1165         LB2_CHECK_LINUX_HEADER_SRC([linux/processor.h], [-Werror])
1166 ])
1167 AC_DEFUN([LIBCFS_HAVE_PROCESSOR_HEADER], [
1168         LB2_CHECK_LINUX_HEADER_RESULT([linux/processor.h], [
1169                 AC_DEFINE(HAVE_PROCESSOR_H, 1,
1170                         [processor.h is present])
1171         ],[])
1172 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
1173
1174 #
1175 # LIBCFS_HAVE_WAIT_BIT_HEADER
1176 #
1177 # Kernel verison 4.12-rc6 commit 5dd43ce2f69d42a71dcacdb13d17d8c0ac1fe8f7
1178 # created wait_bit.h
1179 #
1180 AC_DEFUN([LIBCFS_SRC_HAVE_WAIT_BIT_HEADER], [
1181         LB2_CHECK_LINUX_HEADER_SRC([linux/wait_bit.h], [-Werror])
1182 ])
1183 AC_DEFUN([LIBCFS_HAVE_WAIT_BIT_HEADER], [
1184         LB2_CHECK_LINUX_HEADER_RESULT([linux/wait_bit.h], [
1185                 AC_DEFINE(HAVE_WAIT_BIT_HEADER_H, 1,
1186                         [wait_bit.h is present])
1187         ],[])
1188 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
1189
1190 #
1191 # Kernel version 4.12-rc6 commmit 2055da97389a605c8a00d163d40903afbe413921
1192 # changed:
1193 #       struct wait_queue_head::task_list       => ::head
1194 #       struct wait_queue_entry::task_list      => ::entry
1195 #
1196 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME], [
1197         LB2_LINUX_TEST_SRC([wait_queue_task_list], [
1198                 #include <linux/wait.h>
1199         ],[
1200                 wait_queue_head_t e;
1201
1202                 INIT_LIST_HEAD(&e.head);
1203         ])
1204 ])
1205 AC_DEFUN([LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME], [
1206         AC_MSG_CHECKING([if linux wait_queue_head list_head is named head])
1207         LB2_LINUX_TEST_RESULT([wait_queue_task_list], [
1208                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_LIST, 1,
1209                         [linux wait_queue_head_t list_head is name head])
1210         ])
1211 ]) # LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
1212
1213 #
1214 # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1215 #
1216 # Kernel version v4.12-rc6-23-g76c85ddc4695
1217 # sched/wait: Standardize wait_bit_queue naming
1218 #
1219 # renamed struct wait_bit_queue  => wait_bit_queue_entry
1220 #
1221 AC_DEFUN([LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1222         LB2_LINUX_TEST_SRC([struct_wait_bit_queue_entry_exists], [
1223                 #include <linux/wait.h>
1224                 #if HAVE_WAIT_BIT_HEADER_H
1225                         #include <linux/wait_bit.h>
1226                 #endif
1227         ],[
1228                 struct wait_bit_queue_entry entry;
1229                 memset(&entry, 0, sizeof(entry));
1230         ])
1231 ])
1232 AC_DEFUN([LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1233         AC_MSG_CHECKING([if struct wait_bit_queue_entry exists])
1234         LB2_LINUX_TEST_RESULT([struct_wait_bit_queue_entry_exists], [
1235                 AC_DEFINE(HAVE_WAIT_BIT_QUEUE_ENTRY, 1,
1236                         [if struct wait_bit_queue_entry exists])
1237         ])
1238 ]) # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1239
1240 #
1241 # LIBCFS_NLA_STRDUP
1242 #
1243 # Kernel version 4.13-rc1 commit 2cf0c8b3e6942ecafe6ebb1a6d0328a81641bf39
1244 # created nla_strdup(). This is needed since push strings can be
1245 # any size.
1246 #
1247 AC_DEFUN([LIBCFS_SRC_NLA_STRDUP], [
1248         LB2_LINUX_TEST_SRC([nla_strdup], [
1249                 #include <net/netlink.h>
1250         ],[
1251                 char *tmp = nla_strdup(NULL, GFP_KERNEL);
1252                 (void)tmp;
1253         ],[])
1254 ])
1255 AC_DEFUN([LIBCFS_NLA_STRDUP], [
1256         AC_MSG_CHECKING([if 'nla_strdup()' exists])
1257         LB2_LINUX_TEST_RESULT([nla_strdup], [
1258                 AC_DEFINE(HAVE_NLA_STRDUP, 1,
1259                         ['nla_strdup' is available])
1260         ])
1261 ]) # LIBCFS_NLA_STRDUP
1262
1263 #
1264 # LIBCFS_WAIT_QUEUE_ENTRY
1265 #
1266 # Kernel version 4.13 ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f
1267 # Rename wait_queue_t => wait_queue_entry_t
1268 #
1269 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_ENTRY], [
1270         LB2_LINUX_TEST_SRC([wait_queue_entry], [
1271                 #include <linux/wait.h>
1272         ],[
1273                 wait_queue_entry_t e;
1274
1275                 e.flags = 0;
1276         ])
1277 ])
1278 AC_DEFUN([LIBCFS_WAIT_QUEUE_ENTRY], [
1279         AC_MSG_CHECKING([if 'wait_queue_entry_t' exists])
1280         LB2_LINUX_TEST_RESULT([wait_queue_entry], [
1281                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY, 1,
1282                         ['wait_queue_entry_t' is available])
1283         ])
1284 ]) # LIBCFS_WAIT_QUEUE_ENTRY
1285
1286 #
1287 # LIBCFS_NEW_KERNEL_WRITE
1288 #
1289 # Kernel version 4.14 e13ec939e96b13e664bb6cee361cc976a0ee621a
1290 # changed kernel_write prototype to make is plug compatible
1291 # with the unexported vfs_write()
1292 #
1293 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_WRITE], [
1294         LB2_LINUX_TEST_SRC([kernel_write_match], [
1295                 #include <linux/fs.h>
1296         ],[
1297                 const void *buf = NULL;
1298                 loff_t pos = 0;
1299                 return kernel_write(NULL, buf, 0, &pos);
1300         ],[-Werror])
1301 ])
1302 AC_DEFUN([LIBCFS_NEW_KERNEL_WRITE], [
1303         AC_MSG_CHECKING([if 'kernel_write' matches other read/write helpers])
1304         LB2_LINUX_TEST_RESULT([kernel_write_match], [
1305                 AC_DEFINE(HAVE_NEW_KERNEL_WRITE, 1,
1306                         ['kernel_write' aligns with read/write helpers])
1307         ])
1308 ]) # LIBCFS_NEW_KERNEL_WRITE
1309
1310 #
1311 # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1312 #
1313 # kernel 5.0 commit ca79b0c211af63fa3276f0e3fd7dd9ada2439839
1314 # mm: convert totalram_pages and totalhigh_pages variables to atomic
1315 #
1316 AC_DEFUN([LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC], [
1317         LB2_LINUX_TEST_SRC([totalram_pages], [
1318                 #include <linux/mm.h>
1319         ],[
1320                 totalram_pages_inc();
1321         ],[-Werror])
1322 ])
1323 AC_DEFUN([LIBCFS_MM_TOTALRAM_PAGES_FUNC], [
1324         AC_MSG_CHECKING([if totalram_pages is a function])
1325         LB2_LINUX_TEST_RESULT([totalram_pages], [
1326                 AC_DEFINE(HAVE_TOTALRAM_PAGES_AS_FUNC, 1,
1327                         [if totalram_pages is a function])
1328         ])
1329 ]) # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1330
1331 #
1332 # LIBCFS_NEW_KERNEL_READ
1333 #
1334 # 4.14 commit bdd1d2d3d251c65b74ac4493e08db18971c09240 changed
1335 # the signature of kernel_read to match other read/write helpers
1336 # and place offset last.
1337 #
1338 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_READ], [
1339         LB2_LINUX_TEST_SRC([kernel_read], [
1340                 #include <linux/fs.h>
1341         ],[
1342                 loff_t pos = 0;
1343                 kernel_read(NULL, NULL, 0, &pos);
1344         ],[-Werror])
1345 ])
1346 AC_DEFUN([LIBCFS_NEW_KERNEL_READ], [
1347         AC_MSG_CHECKING([if 'kernel_read()' has loff_t *pos as last parameter])
1348         LB2_LINUX_TEST_RESULT([kernel_read], [
1349                 AC_DEFINE(HAVE_KERNEL_READ_LAST_POSP, 1,
1350                         [kernel_read() signature ends with loff_t *pos])
1351         ])
1352 ]) # LIBCFS_NEW_KERNEL_READ
1353
1354 #
1355 # LIBCFS_DEFINE_TIMER
1356 #
1357 # Kernel version 4.14 commit 1d27e3e2252ba9d949ca82fbdb73cde102cb2067
1358 # remove expires and data arguments from DEFINE_TIMER. Also the callback
1359 # when from using unsigned long argument to using struct timer_list pointer.
1360 #
1361 AC_DEFUN([LIBCFS_SRC_DEFINE_TIMER], [
1362         LB2_LINUX_TEST_SRC([define_timer], [
1363                 #include <linux/timer.h>
1364         ],[
1365                 static DEFINE_TIMER(my_timer, NULL);
1366         ])
1367 ])
1368 AC_DEFUN([LIBCFS_DEFINE_TIMER], [
1369         AC_MSG_CHECKING([if DEFINE_TIMER takes only 2 arguments])
1370         LB2_LINUX_TEST_RESULT([define_timer], [
1371                 AC_DEFINE(HAVE_NEW_DEFINE_TIMER, 1,
1372                         [DEFINE_TIMER uses only 2 arguements])
1373         ])
1374 ]) # LIBCFS_DEFINE_TIMER
1375
1376 #
1377 # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1378 #
1379 # Kernel 2.6.27 commit 8594698ebddeef5443b7da8258ae33b3eaca61d5
1380 # exported save_stack_trace_tsk for x86.
1381 # Kernel 2.6.27 commit 01f4b8b8b8db09b88be7df7e51192e4e678b69d3
1382 # exported save_stack_trace_tsk for powerpc
1383 # Kernel 4.13 commit e27c7fa015d61c8be6a2c32b2144aad2ae6ec975
1384 # exported save_stack_trace_tsk for arm64
1385 # Kernel 4.14 commit 9a3dc3186fc3795e076a4122da9e0258651a9631
1386 # exported save_stack_trace_tsk for arm
1387 #
1388 AC_DEFUN([LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK], [
1389 LB_CHECK_EXPORT([save_stack_trace_tsk], [arch/$SUBARCH/kernel/stacktrace.c],
1390         [AC_DEFINE(HAVE_SAVE_STACK_TRACE_TSK, 1,
1391                 [save_stack_trace_tsk is exported])])
1392 ]) # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1393
1394 #
1395 # LIBCFS_LOCKDEP_IS_HELD
1396 #
1397 # Kernel v4.15-rc8-106-g08f36ff64234
1398 # lockdep: Make lockdep checking constant
1399 #
1400 AC_DEFUN([LIBCFS_SRC_LOCKDEP_IS_HELD], [
1401         LB2_LINUX_TEST_SRC([lockdep_is_held], [
1402                 #include <linux/lockdep.h>
1403         ],[
1404         #ifdef CONFIG_LOCKDEP
1405                 const struct spinlock *lock = NULL;
1406
1407                 lockdep_is_held(lock);
1408         #endif
1409         ],[-Werror])
1410 ])
1411 AC_DEFUN([LIBCFS_LOCKDEP_IS_HELD], [
1412         AC_MSG_CHECKING([if 'lockdep_is_held()' uses const argument])
1413         LB2_LINUX_TEST_RESULT([lockdep_is_held], [],[
1414                 AC_DEFINE(NEED_LOCKDEP_IS_HELD_DISCARD_CONST, 1,
1415                         [lockdep_is_held() argument is const])
1416         ])
1417 ]) # LIBCFS_LOCKDEP_IS_HELD
1418
1419 #
1420 # LIBCFS_BITMAP_TO_ARR32
1421 #
1422 # Kernel commit v4.15-10794-gc724f19 introduced
1423 # bitmap_{from,to}_arr32, which are handy functions, to move
1424 # data back and forth between a bitmap and a u32 array
1425 #
1426 AC_DEFUN([LIBCFS_SRC_BITMAP_TO_ARR32], [
1427         LB2_LINUX_TEST_SRC([bitmap_to_arr32], [
1428                 #include <linux/bitmap.h>
1429         ],[
1430                 bitmap_to_arr32(NULL, NULL, 0);
1431         ],[-Werror])
1432 ])
1433 AC_DEFUN([LIBCFS_BITMAP_TO_ARR32], [
1434         AC_MSG_CHECKING([if 'bitmap_to_arr32()' exist])
1435         LB2_LINUX_TEST_RESULT([bitmap_to_arr32], [
1436                 AC_DEFINE(HAVE_BITMAP_TO_ARR32, 1,
1437                         [bitmap_to_arr32() exist])
1438         ])
1439 ]) # LIBCFS_BITMAP_TO_ARR32
1440
1441 #
1442 # LIBCFS_TIMER_SETUP
1443 #
1444 # Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
1445 # setup_timer() was replaced by timer_setup(), where the callback
1446 # argument is the structure already holding the struct timer_list.
1447 #
1448 AC_DEFUN([LIBCFS_SRC_TIMER_SETUP], [
1449         LB2_LINUX_TEST_SRC([timer_setup], [
1450                 #include <linux/timer.h>
1451         ],[
1452                 timer_setup(NULL, NULL, 0);
1453         ])
1454 ])
1455 AC_DEFUN([LIBCFS_TIMER_SETUP], [
1456         AC_MSG_CHECKING([if setup_timer has been replaced with timer_setup])
1457         LB2_LINUX_TEST_RESULT([timer_setup], [
1458                 AC_DEFINE(HAVE_TIMER_SETUP, 1,
1459                         [timer_setup has replaced setup_timer])
1460         ])
1461 ]) # LIBCFS_TIMER_SETUP
1462
1463 #
1464 # LIBCFS_WAIT_VAR_EVENT
1465 #
1466 # Kernel version 4.16-rc4 commit 6b2bb7265f0b62605e8caee3613449ed0db270b9
1467 # added wait_var_event()
1468 #
1469 AC_DEFUN([LIBCFS_SRC_WAIT_VAR_EVENT], [
1470         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1471                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1472         else
1473                 WAIT_BIT_H=""
1474         fi
1475         LB2_LINUX_TEST_SRC([wait_var_event], [
1476                 #ifdef HAVE_WAIT_BIT_HEADER_H
1477                 #include <linux/wait_bit.h>
1478                 #endif
1479                 #include <linux/wait.h>
1480         ],[
1481                 wake_up_var(NULL);
1482         ],[${WAIT_BIT_H}])
1483 ])
1484 AC_DEFUN([LIBCFS_WAIT_VAR_EVENT], [
1485         AC_MSG_CHECKING([if 'wait_var_event' exist])
1486         LB2_LINUX_TEST_RESULT([wait_var_event], [
1487                 AC_DEFINE(HAVE_WAIT_VAR_EVENT, 1,
1488                         ['wait_var_event' is available])
1489         ])
1490 ]) # LIBCFS_WAIT_VAR_EVENT
1491
1492 #
1493 # LIBCFS_BITMAP_ALLOC
1494 #
1495 # Kernel version 4.17 commit c42b65e363ce97a828f81b59033c3558f8fa7f70
1496 # added bitmap memory allocation handling.
1497 #
1498 AC_DEFUN([LIBCFS_SRC_BITMAP_ALLOC], [
1499         LB2_LINUX_TEST_SRC([bitmap_alloc], [
1500                 #include <linux/bitmap.h>
1501         ],[
1502                 unsigned long *map = bitmap_alloc(1, GFP_KERNEL);
1503                 (void)map;
1504         ])
1505 ])
1506 AC_DEFUN([LIBCFS_BITMAP_ALLOC], [
1507         AC_MSG_CHECKING([if Linux bitmap memory management exist])
1508         LB2_LINUX_TEST_RESULT([bitmap_alloc], [
1509                 AC_DEFINE(HAVE_BITMAP_ALLOC, 1,
1510                         [Linux bitmap can be allocated])
1511         ])
1512 ]) # LIBCFS_BITMAP_ALLOC
1513
1514 #
1515 # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1516 #
1517 # Kernel version 4.17-rc2 commit 8236b0ae31c837d2b3a2565c5f8d77f637e824cc
1518 # added clear_and_wake_up_bit()
1519 #
1520 AC_DEFUN([LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT], [
1521         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1522                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1523         else
1524                 WAIT_BIT_H=""
1525         fi
1526         LB2_LINUX_TEST_SRC([clear_and_wake_up_bit], [
1527                 #ifdef HAVE_WAIT_BIT_HEADER_H
1528                 #include <linux/wait_bit.h>
1529                 #endif
1530                 #include <linux/wait.h>
1531         ],[
1532                 clear_and_wake_up_bit(0, NULL);
1533         ],[${WAIT_BIT_H}])
1534 ])
1535 AC_DEFUN([LIBCFS_CLEAR_AND_WAKE_UP_BIT], [
1536         AC_MSG_CHECKING([if 'clear_and_wake_up_bit' exist])
1537         LB2_LINUX_TEST_RESULT([clear_and_wake_up_bit], [
1538                 AC_DEFINE(HAVE_CLEAR_AND_WAKE_UP_BIT, 1,
1539                         ['clear_and_wake_up_bit' is available])
1540         ])
1541 ]) # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1542
1543 #
1544 # LIBCFS_TCP_SOCK_SET_NODELAY
1545 #
1546 # kernel 4.18.0-293.el8
1547 # tcp_sock_set_nodelay() was added
1548 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_NODELAY], [
1549         LB2_LINUX_TEST_SRC([tcp_sock_set_nodelay_exists], [
1550                 #include <linux/tcp.h>
1551         ],[
1552                 tcp_sock_set_nodelay(NULL);
1553         ],[-Werror])
1554 ])
1555 AC_DEFUN([LIBCFS_TCP_SOCK_SET_NODELAY], [
1556         AC_MSG_CHECKING([if 'tcp_sock_set_nodelay()' exists])
1557         LB2_LINUX_TEST_RESULT([tcp_sock_set_nodelay_exists], [
1558                 AC_DEFINE(HAVE_TCP_SOCK_SET_NODELAY, 1,
1559                         ['tcp_sock_set_nodelay()' exists])
1560         ])
1561 ]) # LIBCFS_TCP_SOCK_SET_NODELAY
1562
1563 #
1564 # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1565 #
1566 # kernel 4.18.0-293.el8
1567 # tcp_sock_set_keepidle() was added
1568 #
1569 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE], [
1570         LB2_LINUX_TEST_SRC([tcp_sock_set_keepidle_exists], [
1571                 #include <linux/tcp.h>
1572         ],[
1573                 tcp_sock_set_keepidle(NULL, 0);
1574         ],[-Werror])
1575 ])
1576 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPIDLE], [
1577         AC_MSG_CHECKING([if 'tcp_sock_set_keepidle()' exists])
1578         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepidle_exists], [
1579                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPIDLE, 1,
1580                         ['tcp_sock_set_keepidle()' exists])
1581         ])
1582 ]) # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1583
1584 #
1585 # LIBCFS_TCP_SOCK_SET_QUICKACK
1586 # kernel v5.7-rc6-2504-gddd061b8daed
1587 #   tcp: add tcp_sock_set_quickack
1588 #
1589 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_QUICKACK], [
1590         LB2_LINUX_TEST_SRC([tcp_sock_set_quickack_exists], [
1591                 #include <linux/tcp.h>
1592         ],[
1593                 tcp_sock_set_quickack(NULL, 0);
1594         ],[-Werror])
1595 ])
1596 AC_DEFUN([LIBCFS_TCP_SOCK_SET_QUICKACK], [
1597         AC_MSG_CHECKING([if 'tcp_sock_set_quickack()' exists])
1598         LB2_LINUX_TEST_RESULT([tcp_sock_set_quickack_exists], [
1599                 AC_DEFINE(HAVE_TCP_SOCK_SET_QUICKACK, 1,
1600                         ['tcp_sock_set_quickack()' exists])
1601         ])
1602 ]) # LIBCFS_TCP_SOCK_SET_QUICKACK
1603
1604 #
1605 # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1606 # v5.7-rc6-2508-gd41ecaac903c
1607 # tcp: add tcp_sock_set_keepintvl
1608 #
1609 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL], [
1610         LB2_LINUX_TEST_SRC([tcp_sock_set_keepintvl_exists], [
1611                 #include <linux/tcp.h>
1612         ],[
1613                 tcp_sock_set_keepintvl(NULL, 0);
1614         ],[-Werror])
1615 ])
1616 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPINTVL], [
1617         AC_MSG_CHECKING([if 'tcp_sock_set_keepintvl()' exists])
1618         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepintvl_exists], [
1619                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPINTVL, 1,
1620                         ['tcp_sock_set_keepintvl()' exists])
1621         ])
1622 ]) # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1623
1624 #
1625 # LIBCFS_TCP_SOCK_SET_KEEPCNT
1626 # v5.7-rc6-2509-g480aeb9639d6
1627 # tcp: add tcp_sock_set_keepcnt
1628 #
1629 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT], [
1630         LB2_LINUX_TEST_SRC([tcp_sock_set_keepcnt_exists], [
1631                 #include <linux/tcp.h>
1632         ],[
1633                 tcp_sock_set_keepcnt(NULL, 0);
1634         ],[-Werror])
1635 ])
1636 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPCNT], [
1637         AC_MSG_CHECKING([if 'tcp_sock_set_keepcnt()' exists])
1638         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepcnt_exists], [
1639                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPCNT, 1,
1640                         ['tcp_sock_set_keepcnt()' exists])
1641         ])
1642 ]) # LIBCFS_TCP_SOCK_SET_KEEPCNT
1643
1644 #
1645 # LIBCFS_XARRAY_SUPPORT
1646 #
1647 # 4.19-rc5 kernel commit 3159f943aafdbacb2f94c38fdaadabf2bbde2a14
1648 # replaced the radix tree implementation with Xarrays. This change
1649 # introduced functionaly needed for general Xarray support
1650 #
1651 AC_DEFUN([LIBCFS_SRC_XARRAY_SUPPORT], [
1652         LB2_LINUX_TEST_SRC([xarray_support], [
1653                 #include <linux/xarray.h>
1654         ],[
1655                 xa_is_value(NULL);
1656         ],[-Werror])
1657 ])
1658 AC_DEFUN([LIBCFS_XARRAY_SUPPORT], [
1659         AC_MSG_CHECKING([if page cache uses Xarray])
1660         LB2_LINUX_TEST_RESULT([xarray_support], [
1661                 AC_DEFINE(HAVE_XARRAY_SUPPORT, 1,
1662                         [kernel Xarray implementation lacks 'xa_is_value'])
1663         ])
1664 ]) # LIBCFS_XARRAY_SUPPORT
1665
1666 #
1667 # LIBCFS_NL_DUMP_EXT_ACK
1668 #
1669 # Kernel version 4.19-rc6 commit 4a19edb60d0203cd5bf95a8b46ea8f63fd41194c
1670 # added extended ACK handling to Netlink dump handlers
1671 #
1672 AC_DEFUN([LIBCFS_SRC_NL_DUMP_EXT_ACK], [
1673         LB2_LINUX_TEST_SRC([netlink_dump_ext_ack], [
1674                 #include <net/netlink.h>
1675         ],[
1676                 struct netlink_callback *cb = NULL;
1677                 cb->extack = NULL;
1678         ],[])
1679 ])
1680 AC_DEFUN([LIBCFS_NL_DUMP_EXT_ACK], [
1681         AC_MSG_CHECKING([if Netlink dump handlers support ext_ack])
1682         LB2_LINUX_TEST_RESULT([netlink_dump_ext_ack], [
1683                 AC_DEFINE(HAVE_NL_DUMP_WITH_EXT_ACK, 1,
1684                         [netlink_ext_ack is handled for Netlink dump handlers])
1685         ])
1686 ]) # LIBCFS_NL_DUMP_EXT_ACK
1687
1688 #
1689 # LIBCFS_HAVE_IOV_ITER_TYPE
1690 #
1691 # kernel 4.20 commit 00e23707442a75b404392cef1405ab4fd498de6b
1692 # iov_iter: Use accessor functions to access an iterator's type and direction.
1693 #
1694 AC_DEFUN([LIBCFS_SRC_HAVE_IOV_ITER_TYPE], [
1695         LB2_LINUX_TEST_SRC([macro_iov_iter_type_exists], [
1696                 #include <linux/uio.h>
1697         ],[
1698                 struct iov_iter iter = { };
1699                 enum iter_type type = iov_iter_type(&iter);
1700                 (void)type;
1701         ],[-Werror])
1702 ])
1703 AC_DEFUN([LIBCFS_HAVE_IOV_ITER_TYPE], [
1704         AC_MSG_CHECKING([if iov_iter_type exists])
1705         LB2_LINUX_TEST_RESULT([macro_iov_iter_type_exists], [
1706                 AC_DEFINE(HAVE_IOV_ITER_TYPE, 1,
1707                         [if iov_iter_type exists])
1708         ])
1709 ]) # LIBCFS_HAVE_IOV_ITER_TYPE
1710
1711 #
1712 # LIBCFS_GENRADIX
1713 #
1714 # Kernel 5.0 commit ba20ba2e3743bac786dff777954c11930256075e
1715 # implemented generic radix trees to handle very large memory
1716 # allocation that can be used instead of vmalloc which has
1717 # a performance penalty.
1718 #
1719 AC_DEFUN([LIBCFS_GENRADIX], [
1720 LB_CHECK_EXPORT([__genradix_ptr], [lib/generic-radix-tree.c],
1721         [AC_DEFINE(HAVE_GENRADIX_SUPPORT, 1,
1722                 [generic-radix-tree is present])])
1723 ]) # LIBCFS_GENRADIX
1724
1725 #
1726 # LIBCFS_GET_REQUEST_KEY_AUTH
1727 #
1728 # kernel 5.0 commit 822ad64d7e46a8e2c8b8a796738d7b657cbb146d
1729 # keys: Fix dependency loop between construction record and auth key
1730 #
1731 # Added <keys/request_key_auth-type.h> and get_request_key_auth()
1732 # which was propagated to stable
1733 #
1734 AC_DEFUN([LIBCFS_SRC_GET_REQUEST_KEY_AUTH], [
1735         LB2_LINUX_TEST_SRC([get_request_key_auth_exported], [
1736                 #include <linux/key.h>
1737                 #include <linux/keyctl.h>
1738                 #include <keys/request_key_auth-type.h>
1739         ],[
1740                 struct key *ring;
1741                 const struct key *key = NULL;
1742                 struct request_key_auth *rka = get_request_key_auth(key);
1743
1744                 ring = key_get(rka->dest_keyring);
1745         ],[-Werror])
1746 ])
1747 AC_DEFUN([LIBCFS_GET_REQUEST_KEY_AUTH], [
1748         AC_MSG_CHECKING([if get_request_key_auth() is available])
1749         LB2_LINUX_TEST_RESULT([get_request_key_auth_exported], [
1750                 AC_DEFINE(HAVE_GET_REQUEST_KEY_AUTH, 1,
1751                         [get_request_key_auth() is available])
1752         ])
1753 ]) # LIBCFS_GET_REQUEST_KEY_AUTH
1754
1755 #
1756 # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1757 #
1758 # Linux commit v5.1-rc3-29-gaa30f47cf666
1759 #    kobject: Add support for default attribute groups to kobj_type
1760 # Linux commit v5.18-rc1-2-gcdb4f26a63c3
1761 #    kobject: kobj_type: remove default_attrs
1762 #
1763 AC_DEFUN([LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS],[
1764         LB2_LINUX_TEST_SRC([kobj_type_default_groups], [
1765                 #include <linux/kobject.h>
1766         ],[
1767                 struct kobj_type *kobj_type = NULL;
1768                 void *has = kobj_type->default_groups;
1769                 (void) has;
1770         ])
1771 ])
1772 AC_DEFUN([LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS],[
1773         AC_MSG_CHECKING([does struct kobj_type have 'default_groups' member])
1774         LB2_LINUX_TEST_RESULT([kobj_type_default_groups], [
1775                 AC_DEFINE(HAVE_KOBJ_TYPE_DEFAULT_GROUPS, 1,
1776                         [struct kobj_type has 'default_groups' member])
1777         ])
1778 ]) # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1779
1780 #
1781 # LIBCFS_LOOKUP_USER_KEY
1782 #
1783 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1784 # signal: Remove task parameter from force_sig
1785 #
1786 AC_DEFUN([LIBCFS_SRC_LOOKUP_USER_KEY], [
1787         LB2_LINUX_TEST_SRC([lookup_user_key_exported], [
1788                 #include <linux/key.h>
1789                 #include <linux/keyctl.h>
1790         ],[
1791                 lookup_user_key(KEY_SPEC_USER_KEYRING, 0, 0);
1792         ],[-Werror])
1793 ])
1794 AC_DEFUN([LIBCFS_LOOKUP_USER_KEY], [
1795         AC_MSG_CHECKING([if lookup_user_key() is available])
1796         LB2_LINUX_TEST_RESULT([lookup_user_key_exported], [
1797                 AC_DEFINE(HAVE_LOOKUP_USER_KEY, 1,
1798                         [lookup_user_key() is available])
1799         ])
1800 ]) # LIBCFS_LOOKUP_USER_KEY
1801
1802 #
1803 # LIBCFS_CACHE_DETAIL_WRITERS
1804 #
1805 # kernel v5.3-rc2-1-g64a38e840ce5
1806 # SUNRPC: Track writers of the 'channel' file to improve cache_listeners_exist
1807 #
1808 AC_DEFUN([LIBCFS_SRC_CACHE_DETAIL_WRITERS], [
1809         LB2_LINUX_TEST_SRC([cache_detail_writers_atomic], [
1810                 #include <linux/sunrpc/cache.h>
1811
1812                 static struct cache_detail rsi_cache;
1813         ],[
1814                 atomic_set(&rsi_cache.writers, 0);
1815         ],[-Werror])
1816 ])
1817 AC_DEFUN([LIBCFS_CACHE_DETAIL_WRITERS], [
1818         AC_MSG_CHECKING([if struct cache_detail has writers])
1819         LB2_LINUX_TEST_RESULT([cache_detail_writers_atomic], [
1820                 AC_DEFINE(HAVE_CACHE_DETAIL_WRITERS, 1,
1821                         [struct cache_detail has writers])
1822         ])
1823 ]) # LIBCFS_CACHE_DETAIL_WRITERS
1824
1825 #
1826 # LIBCFS_GENL_DUMPIT_INFO
1827 #
1828 # kernel v5.4-rc1 commit bf813b0afeae2f012f0e527a526c1b78ca21ad82
1829 # expanded struct genl_dumpit_info to include struct genl_family.
1830 #
1831 AC_DEFUN([LIBCFS_SRC_GENL_DUMPIT_INFO], [
1832         LB2_LINUX_TEST_SRC([genl_dumpit_info], [
1833                 #include <net/genetlink.h>
1834         ],[
1835                 static struct genl_dumpit_info info;
1836
1837                 info.family = NULL;
1838         ],[-Werror])
1839 ])
1840 AC_DEFUN([LIBCFS_GENL_DUMPIT_INFO], [
1841         AC_MSG_CHECKING([if struct genl_dumpit_info has family field])
1842         LB2_LINUX_TEST_RESULT([genl_dumpit_info], [
1843                 AC_DEFINE(HAVE_GENL_DUMPIT_INFO, 1,
1844                         [struct genl_dumpit_info has family field])
1845         ])
1846 ]) # LIBCFS_GENL_DUMPIT_INFO
1847
1848 #
1849 # LIBCFS_KALLSYMS_LOOKUP
1850 #
1851 # kernel v5.6-11591-g0bd476e6c671
1852 # kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()
1853 AC_DEFUN([LIBCFS_KALLSYMS_LOOKUP], [
1854 LB_CHECK_EXPORT([kallsyms_lookup_name], [kernel/kallsyms.c],
1855         [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1856                 [kallsyms_lookup_name is exported by kernel])])
1857 ]) # LIBCFS_KALLSYMS_LOOKUP
1858
1859 #
1860 # v5.5-8862-gd56c0d45f0e2
1861 # proc: decouple proc from VFS with "struct proc_ops"
1862 #
1863 AC_DEFUN([LIBCFS_SRC_HAVE_PROC_OPS], [
1864         LB2_LINUX_TEST_SRC([proc_ops], [
1865                 #include <linux/proc_fs.h>
1866
1867                 static struct proc_ops *my_proc;
1868         ],[
1869                 my_proc->proc_lseek = NULL;
1870         ],[-Werror])
1871 ]) # LIBCFS_SRC_HAVE_PROC_OPS
1872 AC_DEFUN([LIBCFS_HAVE_PROC_OPS], [
1873         AC_MSG_CHECKING([if struct proc_ops exists])
1874         LB2_LINUX_TEST_RESULT([proc_ops], [
1875                 AC_DEFINE(HAVE_PROC_OPS, 1,
1876                         [struct proc_ops exists])
1877         ])
1878 ]) # LIBCFS_HAVE_PROC_OPS
1879
1880 #
1881 # LIBCFS_IP6_SET_PREF
1882 #
1883 # kernel v5.8-rc1~165^2~71^2~3 commit 18d5ad62327576cbb1e5b9938a59d63ac0c15832
1884 # ipv6: add ip6_sock_set_addr_preferences
1885 #
1886 AC_DEFUN([LIBCFS_SRC_IP6_SET_PREF], [
1887         LB2_LINUX_TEST_SRC([ip6_set_pref_test], [
1888                 #include <net/ipv6.h>
1889         ],[
1890                 ip6_sock_set_addr_preferences(NULL, 0);
1891         ],[-Werror])
1892 ])
1893 AC_DEFUN([LIBCFS_IP6_SET_PREF], [
1894         AC_MSG_CHECKING([if ip6_sock_set_addr_preferences() exists])
1895         LB2_LINUX_TEST_RESULT([ip6_set_pref_test], [
1896                 AC_DEFINE(HAVE_IP6_SET_PREF, 1,
1897                         [if ip6_sock_set_addr_preferences exists])
1898         ])
1899 ]) # LIBCFS_IP6_SET_PREF
1900
1901 #
1902 # LIBCFS_VMALLOC_2ARGS
1903 #
1904 # kernel v5.8-rc1~201^2~19
1905 # mm: remove the pgprot argument to __vmalloc
1906 AC_DEFUN([LIBCFS_SRC_VMALLOC_2ARGS], [
1907         LB2_LINUX_TEST_SRC([vmalloc_2args], [
1908                 #include <linux/vmalloc.h>
1909         ],[
1910                 __vmalloc(0, 0);
1911         ],[])
1912 ])
1913 AC_DEFUN([LIBCFS_VMALLOC_2ARGS], [
1914         AC_MSG_CHECKING([if __vmalloc has 2 args])
1915         LB2_LINUX_TEST_RESULT([vmalloc_2args], [
1916                 AC_DEFINE(HAVE_VMALLOC_2ARGS, 1,
1917                         [__vmalloc only takes 2 args.])
1918         ])
1919 ]) # LIBCFS_VMALLOC_2ARGS
1920
1921 #
1922 # LIBCFS_HAVE_NR_UNSTABLE_NFS
1923 #
1924 # kernel v5.8-rc1~201^2~75
1925 # mm/writeback: discard NR_UNSTABLE_NFS, use NR_WRITEBACK instead
1926 #
1927 AC_DEFUN([LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS], [
1928         LB2_LINUX_TEST_SRC([nr_unstable_nfs_exists], [
1929                 #include <linux/mm.h>
1930
1931                 int i;
1932         ],[
1933                 i = NR_UNSTABLE_NFS;
1934         ],[-Werror])
1935 ])
1936 AC_DEFUN([LIBCFS_HAVE_NR_UNSTABLE_NFS], [
1937         AC_MSG_CHECKING([if NR_UNSTABLE_NFS still in use])
1938         LB2_LINUX_TEST_RESULT([nr_unstable_nfs_exists], [
1939                 AC_DEFINE(HAVE_NR_UNSTABLE_NFS, 1,
1940                         [NR_UNSTABLE_NFS is still in use.])
1941         ])
1942 ]) # LIBCFS_HAVE_NR_UNSTABLE_NFS
1943
1944 #
1945 # LIBCFS_HAVE_MMAP_LOCK
1946 #
1947 # kernel v5.8-rc1~83^2~24
1948 # mmap locking API: rename mmap_sem to mmap_lock
1949 #
1950 AC_DEFUN([LIBCFS_SRC_HAVE_MMAP_LOCK], [
1951         LB2_LINUX_TEST_SRC([mmap_write_lock], [
1952                 #include <linux/mm.h>
1953         ],[
1954                 mmap_write_lock(NULL);
1955         ],[])
1956 ])
1957 AC_DEFUN([LIBCFS_HAVE_MMAP_LOCK], [
1958         AC_MSG_CHECKING([if mmap_lock API is available])
1959         LB2_LINUX_TEST_RESULT([mmap_write_lock], [
1960                 AC_DEFINE(HAVE_MMAP_LOCK, 1,
1961                         [mmap_lock API is available.])
1962         ])
1963 ]) # LIBCFS_HAVE_MMAP_LOCK
1964
1965 #
1966 # LIBCFS_KERNEL_SETSOCKOPT
1967 #
1968 # kernel v5.8-rc1~165^2~59^2
1969 # net: remove kernel_setsockopt
1970 AC_DEFUN([LIBCFS_SRC_KERNEL_SETSOCKOPT], [
1971         LB2_LINUX_TEST_SRC([kernel_setsockopt_exists], [
1972                 #include <linux/net.h>
1973         ],[
1974                 kernel_setsockopt(NULL, 0, 0, NULL, 0);
1975         ],[-Werror])
1976 ])
1977 AC_DEFUN([LIBCFS_KERNEL_SETSOCKOPT], [
1978         AC_MSG_CHECKING([if kernel_setsockopt still in use])
1979         LB2_LINUX_TEST_RESULT([kernel_setsockopt_exists], [
1980         AC_DEFINE(HAVE_KERNEL_SETSOCKOPT, 1,
1981                 [kernel_setsockopt still in use])
1982         ])
1983 ]) # LIBCFS_KERNEL_SETSOCKOPT
1984
1985 #
1986 # LIBCFS_KEY_NEED_UNLINK
1987 #
1988 # kernel 5.8 commit 8c0637e950d68933a67f7438f779d79b049b5e5c
1989 # keys: Make the KEY_NEED_* perms an enum rather than a mask
1990 #
1991 AC_DEFUN([LIBCFS_SRC_KEY_NEED_UNLINK], [
1992         LB2_LINUX_TEST_SRC([key_need_unlink_exists], [
1993                 #include <linux/key.h>
1994                 #include <linux/keyctl.h>
1995         ],[
1996                 lookup_user_key(0, 0, KEY_NEED_UNLINK);
1997         ],[-Werror])
1998 ])
1999 AC_DEFUN([LIBCFS_KEY_NEED_UNLINK], [
2000         AC_MSG_CHECKING([if KEY_NEED_UNLINK exists])
2001         LB2_LINUX_TEST_RESULT([key_need_unlink_exists], [
2002                 AC_DEFINE(HAVE_KEY_NEED_UNLINK, 1,
2003                         [KEY_NEED_UNLINK exists])
2004         ])
2005 ]) # LIBCFS_KEY_NEED_UNLINK
2006
2007 #
2008 # LIBCFS_SEC_RELEASE_SECCTX
2009 #
2010 # kernel linux-hwe-5.8 (5.8.0-22.23~20.04.1)
2011 # LSM: Use lsmcontext in security_release_secctx
2012 AC_DEFUN([LIBCFS_SRC_SEC_RELEASE_SECCTX], [
2013         LB2_LINUX_TEST_SRC([security_release_secctx_1arg], [
2014                 #include <linux/security.h>
2015         ],[
2016                 security_release_secctx(NULL);
2017         ],[])
2018 ])
2019 AC_DEFUN([LIBCFS_SEC_RELEASE_SECCTX], [
2020         AC_MSG_CHECKING([if security_release_secctx has 1 arg])
2021         LB2_LINUX_TEST_RESULT([security_release_secctx_1arg], [
2022                 AC_DEFINE(HAVE_SEC_RELEASE_SECCTX_1ARG, 1,
2023                         [security_release_secctx has 1 arg.])
2024         ])
2025 ]) # LIBCFS_SEC_RELEASE_SECCTX
2026
2027 #
2028 # LIBCFS_HAVE_KFREE_SENSITIVE
2029 #
2030 # kernel v5.10-rc1~3
2031 # mm: remove kzfree() compatibility definition
2032 #
2033 AC_DEFUN([LIBCFS_SRC_HAVE_KFREE_SENSITIVE], [
2034         LB2_LINUX_TEST_SRC([kfree_sensitive_exists], [
2035                 #include <linux/slab.h>
2036         ],[
2037                 kfree_sensitive(NULL);
2038         ], [-Werror])
2039 ])
2040 AC_DEFUN([LIBCFS_HAVE_KFREE_SENSITIVE], [
2041         AC_MSG_CHECKING([if kfree_sensitive() is available])
2042         LB2_LINUX_TEST_RESULT([kfree_sensitive_exists], [
2043                 AC_DEFINE(HAVE_KFREE_SENSITIVE, 1,
2044                         [kfree_sensitive() is available.])
2045         ])
2046 ]) # LIBCFS_HAVE_KFREE_SENSITIVE
2047
2048 #
2049 # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2050 #
2051 # Kernel v5.10-rc1-114-ga24d22b225ce
2052 # crypto: sha - split sha.h into sha1.h and sha2.h
2053 #
2054 AC_DEFUN([LIBCFS_SRC_HAVE_CRYPTO_SHA2_HEADER], [
2055         LB2_CHECK_LINUX_HEADER_SRC([crypto/sha2.h], [-Werror])
2056 ])
2057 AC_DEFUN([LIBCFS_HAVE_CRYPTO_SHA2_HEADER], [
2058         LB2_CHECK_LINUX_HEADER_RESULT([crypto/sha2.h], [
2059                 AC_DEFINE(HAVE_CRYPTO_SHA2_HEADER, 1,
2060                         [crypto/sha2.h is present])
2061         ])
2062 ]) # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2063
2064 #
2065 # LIBCFS_HAVE_LIST_CMP_FUNC_T
2066 #
2067 # kernel 5.10.70 commit 4f0f586bf0c898233d8f316f471a21db2abd522d
2068 # treewide: Change list_sort to use const pointers
2069 AC_DEFUN([LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T], [
2070         LB2_LINUX_TEST_SRC([list_cmp_func_t_exists], [
2071                 #include <linux/list_sort.h>
2072         ],[
2073                 list_cmp_func_t cmp;
2074                 (void)cmp;
2075         ], [-Werror])
2076 ])
2077 AC_DEFUN([LIBCFS_HAVE_LIST_CMP_FUNC_T], [
2078         AC_MSG_CHECKING([if list_cmp_func_t type is defined])
2079         LB2_LINUX_TEST_RESULT([list_cmp_func_t_exists], [
2080                 AC_DEFINE(HAVE_LIST_CMP_FUNC_T, 1,
2081                         [list_cmp_func_t type is defined])
2082         ])
2083 ]) # LIBCFS_HAVE_LIST_CMP_FUNC_T
2084
2085 #
2086 # LIBCFS_NLA_STRLCPY
2087 #
2088 # Kernel version 5.10-rc3 commit 872f690341948b502c93318f806d821c56772c42
2089 # replaced nla_strlcpy() with nla_strscpy().
2090 #
2091 AC_DEFUN([LIBCFS_SRC_NLA_STRLCPY], [
2092         LB2_LINUX_TEST_SRC([nla_strlcpy], [
2093                 #include <net/netlink.h>
2094         ],[
2095                 if (nla_strlcpy(NULL, NULL, 0) == 0)
2096                         return -EINVAL;
2097         ])
2098 ])
2099 AC_DEFUN([LIBCFS_NLA_STRLCPY], [
2100         AC_MSG_CHECKING([if 'nla_strlcpy()' still exists])
2101         LB2_LINUX_TEST_RESULT([nla_strlcpy], [
2102                 AC_DEFINE(HAVE_NLA_STRLCPY, 1,
2103                         ['nla_strlcpy' is available])
2104         ])
2105 ]) # LIBCFS_NLA_STRLCPY
2106
2107 #
2108 # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2109 #
2110 # Linux v5.11-11104-ga28a6e860c6c
2111 #  string.h: move fortified functions definitions in a dedicated header.
2112 #
2113 AC_DEFUN([LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER],[
2114         LB2_LINUX_TEST_SRC([linux_fortify_string_header], [
2115                 #include <linux/fortify-string.h>
2116         ],[
2117         ],[])
2118 ])
2119 AC_DEFUN([LIBCFS_LINUX_FORTIFY_STRING_HEADER],[
2120         AC_MSG_CHECKING([Is linux/fortify-string.h header available])
2121         LB2_LINUX_TEST_RESULT([linux_fortify_string_header], [
2122                 AC_DEFINE(HAVE_LINUX_FORTIFY_STRING_HEADER, 1,
2123                         [linux/fortify-string.h header available])
2124         ])
2125 ]) # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2126
2127 #
2128 # LIBCFS_HAVE_CIPHER_HEADER
2129 #
2130 # Kernel 5.12 commit 0eb76ba29d16df2951d37c54ca279c4e5630b071
2131 # crypto: remove cipher routines from public crypto API
2132 #
2133 AC_DEFUN([LIBCFS_SRC_HAVE_CIPHER_HEADER], [
2134         LB2_CHECK_LINUX_HEADER_SRC([crypto/internal/cipher.h], [-Werror])
2135 ])
2136 AC_DEFUN([LIBCFS_HAVE_CIPHER_HEADER], [
2137         LB2_CHECK_LINUX_HEADER_RESULT([crypto/internal/cipher.h], [
2138                 AC_DEFINE(HAVE_CIPHER_H, 1,
2139                         [crypto/internal/cipher.h is present])
2140         ])
2141 ]) # LIBCFS_HAVE_CIPHER_HEADER
2142
2143 #
2144 # LIBCFS_HAVE_TASK_RUNNING
2145 #
2146 # Kernel 5.13-rc6 commit b03fbd4ff24c5f075e58eb19261d5f8b3e40d
2147 # introduced task_is_running() macro.
2148 #
2149 AC_DEFUN([LIBCFS_SRC_HAVE_TASK_IS_RUNNING], [
2150         LB2_LINUX_TEST_SRC([task_is_running], [
2151                 #include <linux/sched.h>
2152         ],[
2153                 if (task_is_running(current))
2154                         schedule();
2155         ], [-Werror])
2156 ])
2157 AC_DEFUN([LIBCFS_HAVE_TASK_IS_RUNNING], [
2158         AC_MSG_CHECKING([if task_is_running() is defined])
2159         LB2_LINUX_TEST_RESULT([task_is_running], [
2160                 AC_DEFINE(HAVE_TASK_IS_RUNNING, 1,
2161                         [task_is_running() is defined])
2162         ])
2163 ]) # LIBCFS_HAVE_TASK_IS_RUNNING
2164
2165 #
2166 # LIBCFS_LINUX_STDARG_HEADER
2167 #
2168 # Kernel 5.14-rc5 commit c0891ac15f0428ffa81b2e818d416bdf3cb74ab6
2169 # isystem: ship and use stdarg.h
2170 #
2171 AC_DEFUN([LIBCFS_SRC_LINUX_STDARG_HEADER], [
2172         LB2_CHECK_LINUX_HEADER_SRC([linux/stdarg.h], [-Werror])
2173 ])
2174 AC_DEFUN([LIBCFS_LINUX_STDARG_HEADER], [
2175         LB2_CHECK_LINUX_HEADER_RESULT([linux/stdarg.h], [
2176                 AC_DEFINE(HAVE_LINUX_STDARG_HEADER, 1,
2177                         [linux/stdarg.h is present])
2178         ])
2179 ]) # LIBCFS_LINUX_STDARG_HEADER
2180
2181 #
2182 # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2183 #
2184 # Kernel 5.14 commit f39650de687e35766572ac89dbcd16a5911e2f0a
2185 # kernel.h: split out panic and oops helpers
2186 #
2187 AC_DEFUN([LIBCFS_SRC_HAVE_PANIC_NOTIFIER_HEADER], [
2188         LB2_CHECK_LINUX_HEADER_SRC([linux/panic_notifier.h], [-Werror])
2189 ])
2190 AC_DEFUN([LIBCFS_HAVE_PANIC_NOTIFIER_HEADER], [
2191         LB2_CHECK_LINUX_HEADER_RESULT([linux/panic_notifier.h], [
2192                 AC_DEFINE(HAVE_PANIC_NOTIFIER_H, 1,
2193                         [linux/panic_notifier.h is present])
2194         ])
2195 ]) # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2196
2197 #
2198 # LIBCFS_PARAM_SET_UINT_MINMAX
2199 #
2200 # Kernel 5.15-rc1 commit 2a14c9ae15a38148484a128b84bff7e9ffd90d68
2201 # moved param_set_uint_minmax to common code
2202 #
2203 AC_DEFUN([LIBCFS_SRC_PARAM_SET_UINT_MINMAX],[
2204         LB2_LINUX_TEST_SRC([param_set_uint_minmax], [
2205                 #include <linux/moduleparam.h>
2206         ],[
2207                 param_set_uint_minmax(NULL, NULL, 0, 0);
2208         ], [])
2209 ])
2210 AC_DEFUN([LIBCFS_PARAM_SET_UINT_MINMAX],[
2211         AC_MSG_CHECKING([does function 'param_set_uint_minmax' exist])
2212         LB2_LINUX_TEST_RESULT([param_set_uint_minmax], [
2213                 AC_DEFINE(HAVE_PARAM_SET_UINT_MINMAX, 1,
2214                         ['param_set_uint_minmax' is available])
2215         ])
2216 ]) # LIBCFS_PARAM_SET_UINT_MINMAX
2217
2218 #
2219 # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2220 #
2221 # Kernel 5.15-rc6 commit fe45e630a1035aea94c29016f2598bbde149bbe3
2222 # block: move integrity handling out of <linux/blkdev.h>
2223 #
2224 AC_DEFUN([LIBCFS_SRC_LINUX_BLK_INTEGRITY_HEADER], [
2225         LB2_CHECK_LINUX_HEADER_SRC([linux/blk-integrity.h], [-Werror])
2226 ])
2227 AC_DEFUN([LIBCFS_LINUX_BLK_INTEGRITY_HEADER], [
2228         LB2_CHECK_LINUX_HEADER_RESULT([linux/blk-integrity.h], [
2229                 AC_DEFINE(HAVE_LINUX_BLK_INTEGRITY_HEADER, 1,
2230                         [linux/blk-integrity.h is present])
2231         ])
2232 ]) # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2233
2234 #
2235 # LIBCFS_PDE_DATA_EXISTS
2236 #
2237 # Linux commit v5.16-11573-g6dfbbae14a7b
2238 #    introduce pde_data()
2239 # Linux commit v5.16-11574-g359745d78351
2240 #    remove PDE_DATA()
2241 #
2242 AC_DEFUN([LIBCFS_SRC_PDE_DATA_EXISTS],[
2243         LB2_LINUX_TEST_SRC([pde_data], [
2244                 #include <linux/proc_fs.h>
2245         ],[
2246                 struct inode *inode = NULL;
2247                 void *data =pde_data(inode);
2248                 (void)data;
2249         ],[])
2250 ])
2251 AC_DEFUN([LIBCFS_PDE_DATA_EXISTS],[
2252         AC_MSG_CHECKING([does function 'pde_data' exist])
2253         LB2_LINUX_TEST_RESULT([pde_data], [
2254                 AC_DEFINE(HAVE_pde_data, 1, [function pde_data() available])
2255         ],[
2256                 AC_DEFINE(pde_data(inode), PDE_DATA(inode),
2257                           [function pde_data() unavailable])
2258         ])
2259 ]) # LIBCFS_PDE_DATA_EXISTS
2260
2261 #
2262 # LIBCFS_BIO_ALLOC_WITH_BDEV
2263 #
2264 # Linux commit v5.17-rc2-21-g07888c665b40
2265 #   block: pass a block_device and opf to bio_alloc
2266 #
2267 AC_DEFUN([LIBCFS_SRC_BIO_ALLOC_WITH_BDEV],[
2268         LB2_LINUX_TEST_SRC([bio_alloc_with_bdev], [
2269                 #include <linux/bio.h>
2270         ],[
2271                 struct block_device *bdev = NULL;
2272                 unsigned short nr_vecs = 1;
2273                 gfp_t gfp = GFP_KERNEL;
2274                 struct bio *bio = bio_alloc(bdev, nr_vecs, REQ_OP_WRITE, gfp);
2275                 (void) bio;
2276         ],[])
2277 ])
2278 AC_DEFUN([LIBCFS_BIO_ALLOC_WITH_BDEV],[
2279         AC_MSG_CHECKING([does bio_alloc() takes a struct block_device])
2280         LB2_LINUX_TEST_RESULT([bio_alloc_with_bdev], [
2281                 AC_DEFINE(HAVE_BIO_ALLOC_WITH_BDEV, 1,
2282                         [bio_alloc() takes a struct block_device])
2283         ])
2284 ]) # LIBCFS_BIO_ALLOC_WITH_BDEV
2285
2286 #
2287 # LIBCFS_TIMER_DELETE_SYNC
2288 #
2289 # Linux commit v6.1-rc1-7-g9a5a30568697
2290 #   timers: Get rid of del_singleshot_timer_sync()
2291 # Linux commit v6.1-rc1-11-g9b13df3fb64e
2292 #   timers: Rename del_timer_sync() to timer_delete_sync()
2293 #
2294 AC_DEFUN([LIBCFS_SRC_TIMER_DELETE_SYNC],[
2295         LB2_LINUX_TEST_SRC([timer_delete_sync], [
2296                 #include <linux/timer.h>
2297         ],[
2298                 struct timer_list *timer = NULL;
2299                 (void)timer_delete_sync(timer);
2300         ],[])
2301 ])
2302 AC_DEFUN([LIBCFS_TIMER_DELETE_SYNC],[
2303         AC_MSG_CHECKING([is timer_delete_sync() available])
2304         LB2_LINUX_TEST_RESULT([timer_delete_sync], [
2305                 AC_DEFINE(HAVE_TIMER_DELETE_SYNC, 1,
2306                         [timer_delete_sync() is available])
2307         ],[
2308                 AC_DEFINE(timer_delete_sync(t), del_timer_sync(t),
2309                         [timer_delete_sync() not is available])
2310         ])
2311 ]) # LIBCFS_TIMER_DELETE_SYNC
2312
2313 #
2314 # LIBCFS_TIMER_DELETE_SYNC
2315 #
2316 # Linux commit v6.1-rc1-12-gbb663f0f3c39
2317 #   timers: Rename del_timer() to timer_delete()
2318 #
2319 AC_DEFUN([LIBCFS_SRC_TIMER_DELETE],[
2320         LB2_LINUX_TEST_SRC([timer_delete], [
2321                 #include <linux/timer.h>
2322         ],[
2323                 struct timer_list *timer = NULL;
2324                 (void)timer_delete(timer);
2325         ],[])
2326 ])
2327 AC_DEFUN([LIBCFS_TIMER_DELETE],[
2328         AC_MSG_CHECKING([is timer_delete() available])
2329         LB2_LINUX_TEST_RESULT([timer_delete], [
2330                 AC_DEFINE(HAVE_TIMER_DELETE, 1,
2331                         [timer_delete() is available])
2332         ],[
2333                 AC_DEFINE(timer_delete(t), del_timer(t),
2334                         [timer_delete() not is available])
2335         ])
2336 ]) # LIBCFS_TIMER_DELETE
2337
2338 dnl #
2339 dnl # Generate and compile all of the kernel API test cases to determine
2340 dnl # which interfaces are available.  By invoking the kernel build system
2341 dnl # only once the compilation can be done in parallel significantly
2342 dnl # speeding up the process.
2343 dnl #
2344 AC_DEFUN([LIBCFS_PROG_LINUX_SRC], [
2345         # 3.11
2346         LIBCFS_SRC_KTIME_GET_TS64
2347         # 3.12
2348         LIBCFS_SRC_PREPARE_TO_WAIT_EVENT
2349         LIBCFS_SRC_KERNEL_PARAM_OPS
2350         LIBCFS_SRC_KTIME_ADD
2351         LIBCFS_SRC_KTIME_AFTER
2352         LIBCFS_SRC_KTIME_BEFORE
2353         LIBCFS_SRC_KTIME_COMPARE
2354         LIBCFS_SRC_SHRINKER_COUNT
2355         # 3.13
2356         LIBCFS_SRC_MATCH_WILDCARD
2357         # 3.14
2358         LIBCFS_SRC_HAVE_MAPPING_AS_EXITING_FLAG
2359         # 3.15
2360         LIBCFS_SRC_IOV_ITER_HAS_TYPE
2361         # 3.16
2362         LIBCFS_SRC_HAVE_GLOB
2363         # 3.17
2364         LIBCFS_SRC_HLIST_ADD_AFTER
2365         LIBCFS_SRC_TIMESPEC64
2366         LIBCFS_SRC_KTIME_GET_NS
2367         LIBCFS_SRC_KTIME_GET_REAL_TS64
2368         LIBCFS_SRC_KTIME_GET_REAL_SECONDS
2369         LIBCFS_SRC_KTIME_GET_REAL_NS
2370         LIBCFS_SRC_KTIME_TO_TIMESPEC64
2371         LIBCFS_SRC_TIMESPEC64_SUB
2372         LIBCFS_SRC_TIMESPEC64_TO_KTIME
2373         # 3.19
2374         LIBCFS_SRC_KTIME_GET_SECONDS
2375         LIBCFS_SRC_WAIT_WOKEN
2376         # 4.0
2377         LIBCFS_SRC_KTIME_MS_DELTA
2378         # 4.1
2379         LIBCFS_SRC_KERNEL_PARAM_LOCK
2380         # 4.2
2381         LIBCFS_SRC_STRSCPY_EXISTS
2382         LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK
2383         # 4.4
2384         LIBCFS_SRC_KSTRTOBOOL_FROM_USER
2385         LIBCFS_SRC_NETLINK_CALLBACK_START
2386         # 4.5
2387         LIBCFS_SRC_CRYPTO_HASH_HELPERS
2388         LIBCFS_SRC_RHASHTABLE_REPLACE
2389         # 4.6
2390         LIBCFS_SRC_BROKEN_HASH_64
2391         LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT
2392         LIBCFS_SRC_GET_USER_PAGES_6ARG
2393         LIBCFS_SRC_STRINGHASH
2394         # 4.7
2395         LIBCFS_SRC_RHASHTABLE_INSERT_FAST
2396         LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG
2397         # 4.8
2398         LIBCFS_SRC_RHASHTABLE_LOOKUP
2399         LIBCFS_SRC_RHLTABLE
2400         LIBCFS_SRC_STACKTRACE_OPS
2401         # 4.9
2402         LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS
2403         LIBCFS_SRC_RHASHTABLE_WALK_ENTER
2404         # 4.10
2405         LIBCFS_SRC_HOTPLUG_STATE_MACHINE
2406         # 4.11
2407         LIBCFS_SRC_NL_EXT_ACK
2408         LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2409         LIBCFS_SRC_SCHED_HEADERS
2410         LIBCFS_SRC_KREF_READ
2411         LIBCFS_SRC_RHT_BUCKET_VAR
2412         # 4.12
2413         LIBCFS_SRC_CPUS_READ_LOCK
2414         LIBCFS_SRC_HAVE_PROCESSOR_HEADER
2415         LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME
2416         LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS
2417         LIBCFS_SRC_REFCOUNT_T
2418         LIBCFS_SRC_MEMALLOC_NORECLAIM
2419         # 4.13
2420         LIBCFS_SRC_NLA_STRDUP
2421         LIBCFS_SRC_WAIT_QUEUE_ENTRY
2422         # 4.14
2423         LIBCFS_SRC_DEFINE_TIMER
2424         LIBCFS_SRC_NEW_KERNEL_WRITE
2425         LIBCFS_SRC_NEW_KERNEL_READ
2426         # 4.15
2427         LIBCFS_SRC_BITMAP_TO_ARR32
2428         LIBCFS_SRC_TIMER_SETUP
2429         # 4.16
2430         LIBCFS_SRC_HAVE_NS_TO_TIMESPEC64
2431         LIBCFS_SRC_WAIT_VAR_EVENT
2432         # 4.17
2433         LIBCFS_SRC_BITMAP_ALLOC
2434         LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT
2435         # 4.18
2436         LIBCFS_SRC_TCP_SOCK_SET_NODELAY
2437         LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE
2438         # 4.19
2439         LIBCFS_SRC_XARRAY_SUPPORT
2440         LIBCFS_SRC_NL_DUMP_EXT_ACK
2441         # 4.20
2442         LIBCFS_SRC_HAVE_IOV_ITER_TYPE
2443         # 5.0
2444         LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC
2445         LIBCFS_SRC_GET_REQUEST_KEY_AUTH
2446         # 5.2
2447         LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS
2448         # 5.3
2449         LIBCFS_SRC_LOOKUP_USER_KEY
2450         LIBCFS_SRC_CACHE_DETAIL_WRITERS
2451         # 5.4
2452         LIBCFS_SRC_GENL_DUMPIT_INFO
2453         # 5.6
2454         LIBCFS_SRC_HAVE_PROC_OPS
2455         # 5.7
2456         LIBCFS_SRC_TCP_SOCK_SET_QUICKACK
2457         LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL
2458         LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT
2459         # 5.8
2460         LIBCFS_SRC_IP6_SET_PREF
2461         LIBCFS_SRC_VMALLOC_2ARGS
2462         LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS
2463         LIBCFS_SRC_HAVE_MMAP_LOCK
2464         LIBCFS_SRC_KERNEL_SETSOCKOPT
2465         LIBCFS_SRC_KEY_NEED_UNLINK
2466         LIBCFS_SRC_SEC_RELEASE_SECCTX
2467         # 5.10
2468         LIBCFS_SRC_HAVE_KFREE_SENSITIVE
2469         LIBCFS_SRC_HAVE_CRYPTO_SHA2_HEADER
2470         LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T
2471         LIBCFS_SRC_NLA_STRLCPY
2472         # 5.12
2473         LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER
2474         LIBCFS_SRC_HAVE_CIPHER_HEADER
2475         # 5.13
2476         LIBCFS_SRC_HAVE_TASK_IS_RUNNING
2477         # 5.14
2478         LIBCFS_SRC_LINUX_STDARG_HEADER
2479         LIBCFS_SRC_HAVE_PANIC_NOTIFIER_HEADER
2480         # 5.15
2481         LIBCFS_SRC_PARAM_SET_UINT_MINMAX
2482         # 5.17
2483         LIBCFS_SRC_PDE_DATA_EXISTS
2484         LIBCFS_SRC_BIO_ALLOC_WITH_BDEV
2485         # 6.2
2486         LIBCFS_SRC_TIMER_DELETE_SYNC
2487         LIBCFS_SRC_TIMER_DELETE
2488 ])
2489
2490 dnl #
2491 dnl # Check results of kernel interface tests.
2492 dnl #
2493 AC_DEFUN([LIBCFS_PROG_LINUX_RESULTS], [
2494         # 3.11
2495         LIBCFS_KTIME_GET_TS64
2496         # 3.12
2497         LIBCFS_PREPARE_TO_WAIT_EVENT
2498         LIBCFS_KERNEL_PARAM_OPS
2499         LIBCFS_KTIME_ADD
2500         LIBCFS_KTIME_AFTER
2501         LIBCFS_KTIME_BEFORE
2502         LIBCFS_KTIME_COMPARE
2503         LIBCFS_SHRINKER_COUNT
2504         # 3.13
2505         LIBCFS_MATCH_WILDCARD
2506         # 3.14
2507         LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
2508         # 3.15
2509         LIBCFS_IOV_ITER_HAS_TYPE
2510         # 3.16
2511         LIBCFS_HAVE_GLOB
2512         # 3.17
2513         LIBCFS_HLIST_ADD_AFTER
2514         LIBCFS_TIMESPEC64
2515         LIBCFS_KTIME_GET_NS
2516         LIBCFS_KTIME_GET_REAL_TS64
2517         LIBCFS_KTIME_GET_REAL_SECONDS
2518         LIBCFS_KTIME_GET_REAL_NS
2519         LIBCFS_KTIME_TO_TIMESPEC64
2520         LIBCFS_TIMESPEC64_SUB
2521         LIBCFS_TIMESPEC64_TO_KTIME
2522         # 3.19
2523         LIBCFS_KTIME_GET_SECONDS
2524         LIBCFS_WAIT_WOKEN
2525         # 4.0
2526         LIBCFS_KTIME_MS_DELTA
2527         # 4.1
2528         LIBCFS_KERNEL_PARAM_LOCK
2529         # 4.2
2530         LIBCFS_STRSCPY_EXISTS
2531         LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
2532         # 4.4
2533         LIBCFS_KSTRTOBOOL_FROM_USER
2534         LIBCFS_NETLINK_CALLBACK_START
2535         # 4.5
2536         LIBCFS_CRYPTO_HASH_HELPERS
2537         LIBCFS_RHASHTABLE_REPLACE
2538         # 4.6
2539         LIBCFS_BROKEN_HASH_64
2540         LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
2541         LIBCFS_GET_USER_PAGES_6ARG
2542         LIBCFS_STRINGHASH
2543         # 4.7
2544         LIBCFS_RHASHTABLE_INSERT_FAST
2545         LIBCFS_RHASHTABLE_WALK_INIT_3ARG
2546         # 4.8
2547         LIBCFS_RHASHTABLE_LOOKUP
2548         LIBCFS_RHLTABLE
2549         LIBCFS_STACKTRACE_OPS
2550         # 4.9
2551         LIBCFS_GET_USER_PAGES_GUP_FLAGS
2552         LIBCFS_RHASHTABLE_WALK_ENTER
2553         # 4.10
2554         LIBCFS_HOTPLUG_STATE_MACHINE
2555         # 4.11
2556         LIBCFS_NL_EXT_ACK
2557         LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2558         LIBCFS_SCHED_HEADERS
2559         LIBCFS_KREF_READ
2560         LIBCFS_RHT_BUCKET_VAR
2561         # 4.12
2562         LIBCFS_CPUS_READ_LOCK
2563         LIBCFS_HAVE_PROCESSOR_HEADER
2564         LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
2565         LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
2566         LIBCFS_REFCOUNT_T
2567         LIBCFS_MEMALLOC_NORECLAIM
2568         # 4.13
2569         LIBCFS_NLA_STRDUP
2570         LIBCFS_WAIT_QUEUE_ENTRY
2571         # 4.14
2572         LIBCFS_DEFINE_TIMER
2573         LIBCFS_NEW_KERNEL_WRITE
2574         LIBCFS_NEW_KERNEL_READ
2575         # 4.15
2576         LIBCFS_BITMAP_TO_ARR32
2577         LIBCFS_TIMER_SETUP
2578         # 4.16
2579         LIBCFS_HAVE_NS_TO_TIMESPEC64
2580         LIBCFS_WAIT_VAR_EVENT
2581         # 4.17
2582         LIBCFS_BITMAP_ALLOC
2583         LIBCFS_CLEAR_AND_WAKE_UP_BIT
2584         # 4.18
2585         LIBCFS_TCP_SOCK_SET_NODELAY
2586         LIBCFS_TCP_SOCK_SET_KEEPIDLE
2587         # 4.19
2588         LIBCFS_XARRAY_SUPPORT
2589         LIBCFS_NL_DUMP_EXT_ACK
2590         # 4.20
2591         LIBCFS_HAVE_IOV_ITER_TYPE
2592         # 5.0
2593         LIBCFS_MM_TOTALRAM_PAGES_FUNC
2594         LIBCFS_GET_REQUEST_KEY_AUTH
2595         # 5.2
2596         LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
2597         # 5.3
2598         LIBCFS_LOOKUP_USER_KEY
2599         LIBCFS_CACHE_DETAIL_WRITERS
2600         # 5.4
2601         LIBCFS_GENL_DUMPIT_INFO
2602         # 5.6
2603         LIBCFS_HAVE_PROC_OPS
2604         # 5.7
2605         LIBCFS_TCP_SOCK_SET_QUICKACK
2606         LIBCFS_TCP_SOCK_SET_KEEPINTVL
2607         LIBCFS_TCP_SOCK_SET_KEEPCNT
2608         # 5.8
2609         LIBCFS_IP6_SET_PREF
2610         LIBCFS_VMALLOC_2ARGS
2611         LIBCFS_HAVE_NR_UNSTABLE_NFS
2612         LIBCFS_HAVE_MMAP_LOCK
2613         LIBCFS_KERNEL_SETSOCKOPT
2614         LIBCFS_KEY_NEED_UNLINK
2615         LIBCFS_SEC_RELEASE_SECCTX
2616         # 5.10
2617         LIBCFS_HAVE_KFREE_SENSITIVE
2618         LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2619         LIBCFS_HAVE_LIST_CMP_FUNC_T
2620         LIBCFS_NLA_STRLCPY
2621         # 5.12
2622         LIBCFS_LINUX_FORTIFY_STRING_HEADER
2623         LIBCFS_HAVE_CIPHER_HEADER
2624         # 5.13
2625         LIBCFS_HAVE_TASK_IS_RUNNING
2626         # 5.14
2627         LIBCFS_LINUX_STDARG_HEADER
2628         LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2629         # 5.15
2630         LIBCFS_PARAM_SET_UINT_MINMAX
2631         # 5.17
2632         LIBCFS_PDE_DATA_EXISTS
2633         LIBCFS_BIO_ALLOC_WITH_BDEV
2634         # 6.2
2635         LIBCFS_TIMER_DELETE_SYNC
2636         LIBCFS_TIMER_DELETE
2637 ])
2638
2639 #
2640 # LIBCFS_PROG_LINUX
2641 #
2642 # LibCFS linux kernel checks
2643 #
2644 AC_DEFUN([LIBCFS_PROG_LINUX], [
2645 AC_MSG_NOTICE([LibCFS kernel checks
2646 ==============================================================================])
2647 LIBCFS_CONFIG_PANIC_DUMPLOG
2648
2649 # 4.6 - Export Check
2650 LIBCFS_EXPORT_KSET_FIND_OBJ
2651 # 4.13 - Export Check
2652 LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
2653 # 5.0 - Export Check
2654 LIBCFS_GENRADIX
2655 # 5.7 - Export Check
2656 LIBCFS_KALLSYMS_LOOKUP
2657 ]) # LIBCFS_PROG_LINUX
2658
2659 #
2660 # LIBCFS_PATH_DEFAULTS
2661 #
2662 # default paths for installed files
2663 #
2664 AC_DEFUN([LIBCFS_PATH_DEFAULTS], [
2665 ]) # LIBCFS_PATH_DEFAULTS
2666
2667 #
2668 # LIBCFS_CONFIGURE
2669 #
2670 # other configure checks
2671 #
2672 AC_DEFUN([LIBCFS_CONFIGURE], [
2673 AC_MSG_NOTICE([LibCFS core checks
2674 ==============================================================================])
2675
2676 # libcfs/libcfs/util/nidstrings.c
2677 AC_CHECK_HEADERS([netdb.h asm/types.h endian.h])
2678 AC_CHECK_FUNCS([gethostbyname])
2679 AC_CHECK_FUNCS([getaddrinfo])
2680
2681 # --------  Check for required packages  --------------
2682
2683 AC_MSG_NOTICE([LibCFS required packages checks
2684 ==============================================================================])
2685
2686 AC_MSG_CHECKING([whether to enable readline support])
2687 AC_ARG_ENABLE(readline,
2688         AS_HELP_STRING([--disable-readline],
2689                 [disable readline support]),
2690         [], [enable_readline="yes"])
2691 AC_MSG_RESULT([$enable_readline])
2692
2693 LIBREADLINE=""
2694 AS_IF([test "x$enable_readline" = xyes], [
2695         AC_CHECK_LIB([readline], [readline], [
2696                 LIBREADLINE="-lreadline"
2697                 AC_DEFINE(HAVE_LIBREADLINE, 1,
2698                         [readline library is available])
2699         ])
2700
2701         AC_SUBST(ENABLE_READLINE, yes)
2702 ], [
2703         AC_SUBST(ENABLE_READLINE, no)
2704 ])
2705 AC_SUBST(LIBREADLINE)
2706
2707 AC_MSG_CHECKING([whether to use libpthread for libcfs library])
2708 AC_ARG_ENABLE([libpthread],
2709         AS_HELP_STRING([--disable-libpthread],
2710                 [disable libpthread]),
2711         [], [enable_libpthread="yes"])
2712 AC_MSG_RESULT([$enable_libpthread])
2713
2714 PTHREAD_LIBS=""
2715 AS_IF([test "x$enable_libpthread" = xyes], [
2716         AC_CHECK_LIB([pthread], [pthread_create], [
2717                 PTHREAD_LIBS="-lpthread"
2718                 AC_DEFINE([HAVE_LIBPTHREAD], 1,
2719                         [use libpthread for libcfs library])
2720         ])
2721
2722         AC_SUBST(ENABLE_LIBPTHREAD, yes)
2723 ], [
2724         AC_SUBST(ENABLE_LIBPTHREAD, no)
2725         AC_MSG_WARN([Using libpthread for libcfs library is disabled explicitly])
2726 ])
2727 AC_SUBST(PTHREAD_LIBS)
2728 ]) # LIBCFS_CONFIGURE
2729
2730 #
2731 # LIBCFS_CONFIG_FILES
2732 #
2733 # files that should be generated with AC_OUTPUT
2734 #
2735 AC_DEFUN([LIBCFS_CONFIG_FILES], [
2736 AC_CONFIG_FILES([
2737 libcfs/Makefile
2738 libcfs/autoMakefile
2739 libcfs/autoconf/Makefile
2740 libcfs/include/Makefile
2741 libcfs/include/libcfs/Makefile
2742 libcfs/include/uapi/Makefile
2743 libcfs/include/libcfs/linux/Makefile
2744 libcfs/include/libcfs/util/Makefile
2745 libcfs/include/libcfs/crypto/Makefile
2746 libcfs/include/uapi/linux/Makefile
2747 libcfs/libcfs/Makefile
2748 libcfs/libcfs/autoMakefile
2749 libcfs/libcfs/linux/Makefile
2750 libcfs/libcfs/util/Makefile
2751 libcfs/libcfs/crypto/Makefile
2752 ])
2753 ]) # LIBCFS_CONFIG_FILES