libcfs/autoconf/lustre-libcfs.m4

   1 #
   2 # LIBCFS_CONFIG_CDEBUG
   3 #
   4 # whether to enable various libcfs debugs (CDEBUG, ENTRY/EXIT, LASSERT, etc.)
   5 #
   6 AC_DEFUN([LIBCFS_CONFIG_CDEBUG], [
   7 AC_MSG_CHECKING([whether to enable CDEBUG, CWARN])
   8 AC_ARG_ENABLE([libcfs_cdebug],
   9         AS_HELP_STRING([--disable-libcfs-cdebug],
  10                 [disable libcfs CDEBUG, CWARN]),
  11         [], [enable_libcfs_cdebug="yes"])
  12 AC_MSG_RESULT([$enable_libcfs_cdebug])
  13 AS_IF([test "x$enable_libcfs_cdebug" = xyes], [
  14         AC_DEFINE(CDEBUG_ENABLED, 1, [enable libcfs CDEBUG, CWARN])
  15         AC_SUBST(ENABLE_LIBCFS_CDEBUG, yes)
  16 ], [
  17         AC_SUBST(ENABLE_LIBCFS_CDEBUG, no)
  18 ])
  19
  20 AC_MSG_CHECKING([whether to enable ENTRY/EXIT])
  21 AC_ARG_ENABLE([libcfs_trace],
  22         AS_HELP_STRING([--disable-libcfs-trace],
  23                 [disable libcfs ENTRY/EXIT]),
  24         [], [enable_libcfs_trace="yes"])
  25 AC_MSG_RESULT([$enable_libcfs_trace])
  26 AS_IF([test "x$enable_libcfs_trace" = xyes], [
  27         AC_DEFINE(CDEBUG_ENTRY_EXIT, 1, [enable libcfs ENTRY/EXIT])
  28         AC_SUBST(ENABLE_LIBCFS_TRACE, yes)
  29 ], [
  30         AC_SUBST(ENABLE_LIBCFS_TRACE, no)
  31 ])
  32
  33 AC_MSG_CHECKING([whether to enable LASSERT, LASSERTF])
  34 AC_ARG_ENABLE([libcfs_assert],
  35         AS_HELP_STRING([--disable-libcfs-assert],
  36                 [disable libcfs LASSERT, LASSERTF]),
  37         [], [enable_libcfs_assert="yes"])
  38 AC_MSG_RESULT([$enable_libcfs_assert])
  39 AS_IF([test x$enable_libcfs_assert = xyes], [
  40         AC_DEFINE(LIBCFS_DEBUG, 1, [enable libcfs LASSERT, LASSERTF])
  41         AC_SUBST(ENABLE_LIBCFS_ASSERT, yes)
  42 ], [
  43         AC_SUBST(ENABLE_LIBCFS_ASSERT, no)
  44 ])
  45 ]) # LIBCFS_CONFIG_CDEBUG
  46
  47 #
  48 # LIBCFS_CONFIG_PANIC_DUMPLOG
  49 #
  50 # check if tunable panic_dumplog is wanted
  51 #
  52 AC_DEFUN([LIBCFS_CONFIG_PANIC_DUMPLOG], [
  53 AC_MSG_CHECKING([whether to use tunable 'panic_dumplog' support])
  54 AC_ARG_ENABLE([panic_dumplog],
  55         AS_HELP_STRING([--enable-panic_dumplog],
  56                 [enable panic_dumplog]),
  57         [], [enable_panic_dumplog="no"])
  58 AC_MSG_RESULT([$enable_panic_dumplog])
  59 AS_IF([test "x$enable_panic_dumplog" = xyes], [
  60         AC_DEFINE(LNET_DUMP_ON_PANIC, 1, [use dumplog on panic])
  61         AC_SUBST(ENABLE_PANIC_DUMPLOG, yes)
  62 ], [
  63         AC_SUBST(ENABLE_PANIC_DUMPLOG, no)
  64 ])
  65 ]) # LIBCFS_CONFIG_PANIC_DUMPLOG
  66
  67 #
  68 # Kernel version 3.11 introduced ktime_get_ts64
  69 #
  70 AC_DEFUN([LIBCFS_SRC_KTIME_GET_TS64], [
  71         LB2_LINUX_TEST_SRC([ktime_get_ts64], [
  72                 #include <linux/hrtimer.h>
  73                 #include <linux/ktime.h>
  74         ],[
  75                 struct timespec64 *ts = NULL;
  76
  77                 ktime_get_ts64(ts);
  78         ])
  79 ])
  80 AC_DEFUN([LIBCFS_KTIME_GET_TS64], [
  81         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_ts64' exist],
  82         [ktime_get_ts64], [
  83                 AC_DEFINE(HAVE_KTIME_GET_TS64, 1,
  84                         ['ktime_get_ts64' is available])
  85         ])
  86 ]) # LIBCFS_KTIME_GET_TS64
  87
  88 #
  89 # Kernel version 3.12-rc4 commit c2d816443ef30 added prepare_to_wait_event()
  90 #
  91 AC_DEFUN([LIBCFS_SRC_PREPARE_TO_WAIT_EVENT],[
  92         LB2_LINUX_TEST_SRC([prepare_to_wait_event], [
  93                 #include <linux/wait.h>
  94         ],[
  95                 prepare_to_wait_event(NULL, NULL, 0);
  96         ])
  97 ])
  98 AC_DEFUN([LIBCFS_PREPARE_TO_WAIT_EVENT],[
  99         LB2_MSG_LINUX_TEST_RESULT([does function 'prepare_to_wait_event' exist],
 100         [prepare_to_wait_event], [
 101                 AC_DEFINE(HAVE_PREPARE_TO_WAIT_EVENT, 1,
 102                         ['prepare_to_wait_event' is available])
 103         ])
 104 ]) # LIBCFS_PREPARE_TO_WAIT_EVENT
 105
 106 #
 107 # Linux kernel 3.12 introduced struct kernel_param_ops
 108 # This has been backported to all lustre supported
 109 # clients except RHEL6. We have to handle the differences.
 110 #
 111 AC_DEFUN([LIBCFS_SRC_KERNEL_PARAM_OPS],[
 112         LB2_LINUX_TEST_SRC([kernel_param_ops], [
 113                 #include <linux/module.h>
 114         ],[
 115                 struct kernel_param_ops ops;
 116
 117                 ops.set = NULL;
 118         ])
 119 ])
 120 AC_DEFUN([LIBCFS_KERNEL_PARAM_OPS],[
 121         LB2_MSG_LINUX_TEST_RESULT([does 'struct kernel_param_ops' exist],
 122         [kernel_param_ops], [
 123                 AC_DEFINE(HAVE_KERNEL_PARAM_OPS, 1,
 124                         ['struct kernel_param_ops' is available])
 125         ])
 126 ]) # LIBCFS_KERNEL_PARAM_OPS
 127
 128 #
 129 # Kernel version 3.12 introduced ktime_add
 130 #
 131 AC_DEFUN([LIBCFS_SRC_KTIME_ADD],[
 132         LB2_LINUX_TEST_SRC([ktime_add], [
 133                 #include <linux/hrtimer.h>
 134                 #include <linux/ktime.h>
 135         ],[
 136                 ktime_t start = ktime_set(0, 0);
 137                 ktime_t end = start;
 138                 ktime_t total;
 139
 140                 total = ktime_add(start, end);
 141         ])
 142 ])
 143 AC_DEFUN([LIBCFS_KTIME_ADD],[
 144         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_add' exist],
 145         [ktime_add], [
 146                 AC_DEFINE(HAVE_KTIME_ADD, 1, [ktime_add is available])
 147         ])
 148 ]) # LIBCFS_KTIME_ADD
 149
 150 #
 151 # Kernel version 3.12 introduced ktime_after
 152 #
 153 AC_DEFUN([LIBCFS_SRC_KTIME_AFTER],[
 154         LB2_LINUX_TEST_SRC([ktime_after], [
 155                 #include <linux/hrtimer.h>
 156                 #include <linux/ktime.h>
 157         ],[
 158                 ktime_t start = ktime_set(0, 0);
 159                 ktime_t end = start;
 160
 161                 ktime_after(start, end);
 162         ])
 163 ])
 164 AC_DEFUN([LIBCFS_KTIME_AFTER],[
 165         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_after' exist],
 166         [ktime_after], [
 167                 AC_DEFINE(HAVE_KTIME_AFTER, 1, [ktime_after is available])
 168         ])
 169 ]) # LIBCFS_KTIME_AFTER
 170
 171 #
 172 # Kernel version 3.12 introduced ktime_before
 173 # See linux commit 67cb9366ff5f99868100198efba5ca88aaa6ad25
 174 #
 175 AC_DEFUN([LIBCFS_SRC_KTIME_BEFORE],[
 176         LB2_LINUX_TEST_SRC([ktime_before], [
 177                 #include <linux/hrtimer.h>
 178                 #include <linux/ktime.h>
 179         ],[
 180                 ktime_t start = ktime_set(0, 0);
 181                 ktime_t end = start;
 182
 183                 ktime_before(start, end);
 184         ])
 185 ])
 186 AC_DEFUN([LIBCFS_KTIME_BEFORE],[
 187         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_before' exist],
 188         [ktime_before], [
 189                 AC_DEFINE(HAVE_KTIME_BEFORE, 1, [ktime_before is available])
 190         ])
 191 ]) # LIBCFS_KTIME_BEFORE
 192
 193 #
 194 # Kernel version 3.12 introduced ktime_compare
 195 #
 196 AC_DEFUN([LIBCFS_SRC_KTIME_COMPARE],[
 197         LB2_LINUX_TEST_SRC([ktime_compare], [
 198                 #include <linux/hrtimer.h>
 199                 #include <linux/ktime.h>
 200         ],[
 201                 ktime_t start = ktime_set(0, 0);
 202                 ktime_t end = start;
 203
 204                 ktime_compare(start, end);
 205         ])
 206 ])
 207 AC_DEFUN([LIBCFS_KTIME_COMPARE],[
 208         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_compare' exist],
 209         [ktime_compare], [
 210                 AC_DEFINE(HAVE_KTIME_COMPARE, 1,
 211                         [ktime_compare is available])
 212         ])
 213 ]) # LIBCFS_KTIME_COMPARE
 214
 215 #
 216 # FC19 3.12 kernel struct shrinker change
 217 #
 218 AC_DEFUN([LIBCFS_SRC_SHRINKER_COUNT],[
 219         LB2_LINUX_TEST_SRC([shrinker_count_objects], [
 220                 #include <linux/mmzone.h>
 221                 #include <linux/shrinker.h>
 222         ],[
 223                 struct shrinker shrinker;
 224
 225                 shrinker.count_objects = NULL;
 226         ])
 227 ])
 228 AC_DEFUN([LIBCFS_SHRINKER_COUNT],[
 229         LB2_MSG_LINUX_TEST_RESULT([shrinker has 'count_objects'],
 230         [shrinker_count_objects], [
 231                 AC_DEFINE(HAVE_SHRINKER_COUNT, 1,
 232                         [shrinker has count_objects member])
 233         ])
 234 ]) # LIBCFS_SHRINKER_COUNT
 235
 236 #
 237 # Kernel version 3.13 commit aace05097a0fd467230e39acb148be0fdaa90068
 238 # add match_wildcard() function.
 239 #
 240 AC_DEFUN([LIBCFS_SRC_MATCH_WILDCARD],[
 241         LB2_LINUX_TEST_SRC([match_wildcard], [
 242                 #include <linux/parser.h>
 243         ],[
 244                 bool match;
 245
 246                 match = match_wildcard(NULL, NULL);
 247         ])
 248 ])
 249 AC_DEFUN([LIBCFS_MATCH_WILDCARD],[
 250         LB2_MSG_LINUX_TEST_RESULT([does function 'match_wildcard' exist],
 251         [match_wildcard], [
 252                 AC_DEFINE(HAVE_MATCH_WILDCARD, 1,
 253                         [match_wildcard() is available])
 254         ])
 255 ]) # LIBCFS_MATCH_WILDCARD
 256
 257 #
 258 # LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
 259 #
 260 # v3.14-7405-g91b0abe36a7b added AS_EXITING flag with
 261 # mapping_exiting() and mapping_set_exiting()
 262 #
 263 AC_DEFUN([LIBCFS_SRC_HAVE_MAPPING_AS_EXITING_FLAG], [
 264 m4_pattern_allow([AS_EXITING])
 265         LB2_LINUX_TEST_SRC([mapping_exiting_exists], [
 266                 #include <linux/pagemap.h>
 267         ],[
 268                 enum mapping_flags flag = AS_EXITING;
 269                 (void)flag;
 270         ],[-Werror])
 271 ])
 272 AC_DEFUN([LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG], [
 273         LB2_MSG_LINUX_TEST_RESULT([if enum mapping_flags has AS_EXITING flag],
 274         [mapping_exiting_exists], [
 275                 AC_DEFINE(HAVE_MAPPING_AS_EXITING_FLAG, 1,
 276                         [enum mapping_flags has AS_EXITING flag])
 277         ])
 278 ]) # LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
 279
 280 #
 281 # LIBCFS_IOV_ITER_HAS_TYPE
 282 #
 283 # kernel 3.15-rc4 commit 71d8e532b1549a478e6a6a8a44f309d050294d00
 284 # start adding the tag to iov_iter
 285 #
 286 AC_DEFUN([LIBCFS_SRC_IOV_ITER_HAS_TYPE], [
 287         LB2_LINUX_TEST_SRC([iov_iter_has_type_member], [
 288                 #include <linux/uio.h>
 289         ],[
 290                 struct iov_iter iter = { .type = ITER_KVEC };
 291                 (void)iter;
 292         ],
 293         [-Werror])
 294 ])
 295 AC_DEFUN([LIBCFS_IOV_ITER_HAS_TYPE], [
 296         LB2_MSG_LINUX_TEST_RESULT([if iov_iter has member type],
 297         [iov_iter_has_type_member], [
 298                 AC_DEFINE(HAVE_IOV_ITER_HAS_TYPE_MEMBER, 1,
 299                         [if iov_iter has member type])
 300         ])
 301 ]) # LIBCFS_IOV_ITER_HAS_TYPE
 302
 303 #
 304 # LIBCFS_HAVE_NS_TO_TIMESPEC64
 305 #
 306 # Kernel version 3.16-rc3 commit a84d1169164b274f13b97a23ff235c000efe3b49
 307 # introduced struct __kernel_old_timeval
 308 #
 309 AC_DEFUN([LIBCFS_SRC_HAVE_NS_TO_TIMESPEC64],[
 310         LB2_LINUX_TEST_SRC([kernel_old_timeval], [
 311                 #include <linux/time.h>
 312         ],[
 313                 struct timespec64 kts;
 314
 315                 kts = ns_to_timespec64(0);
 316         ])
 317 ])
 318 AC_DEFUN([LIBCFS_HAVE_NS_TO_TIMESPEC64],[
 319         LB2_MSG_LINUX_TEST_RESULT([does 'ns_to_timespec64()' exist],
 320         [kernel_old_timeval], [
 321                 AC_DEFINE(HAVE_NS_TO_TIMESPEC64, 1,
 322                         [ns_to_timespec64() is available])
 323         ])
 324 ]) # LIBCFS_HAVE_NS_TO_TIMESPEC64
 325
 326 #
 327 # LIBCFS_HAVE_GLOB
 328 #
 329 # Kernel version 3.16 commit b01250856b25f4417c51aa33afc451fbf7da1484
 330 # added glob support to the Linux kernel
 331 #
 332 AC_DEFUN([LIBCFS_SRC_HAVE_GLOB],[
 333         LB2_LINUX_TEST_SRC([glob_match], [
 334                 #include <linux/glob.h>
 335         ],[
 336                 return glob_match(NULL, NULL);
 337         ],[-Werror])
 338 ])
 339 AC_DEFUN([LIBCFS_HAVE_GLOB],[
 340         LB2_MSG_LINUX_TEST_RESULT([does 'glob_match()' exist],
 341         [glob_match], [
 342                 AC_DEFINE(HAVE_GLOB, 1,
 343                         [glob_match() is available])
 344         ])
 345 ]) # LIBCFS_HAVE_GLOB
 346
 347 #
 348 # Kernel version 3.17 changed hlist_add_after to
 349 # hlist_add_behind
 350 #
 351 AC_DEFUN([LIBCFS_SRC_HLIST_ADD_AFTER],[
 352         LB2_LINUX_TEST_SRC([hlist_add_after], [
 353                 #include <linux/list.h>
 354         ],[
 355                 hlist_add_after(NULL, NULL);
 356         ])
 357 ])
 358 AC_DEFUN([LIBCFS_HLIST_ADD_AFTER],[
 359         LB2_MSG_LINUX_TEST_RESULT([does function 'hlist_add_after' exist],
 360         [hlist_add_after], [
 361                 AC_DEFINE(HAVE_HLIST_ADD_AFTER, 1,
 362                         [hlist_add_after is available])
 363         ])
 364 ]) # LIBCFS_HLIST_ADD_AFTER
 365
 366 #
 367 # Kernel version 3.17 introduced struct timespec64
 368 #
 369 AC_DEFUN([LIBCFS_SRC_TIMESPEC64],[
 370         LB2_LINUX_TEST_SRC([timespec64], [
 371                 #include <linux/time.h>
 372         ],[
 373                 struct timespec64 ts;
 374
 375                 ts.tv_sec = 0;
 376                 ts.tv_nsec = 0;
 377         ])
 378 ])
 379 AC_DEFUN([LIBCFS_TIMESPEC64],[
 380         LB2_MSG_LINUX_TEST_RESULT([does 'struct timespec64' exist],
 381         [timespec64], [
 382                 AC_DEFINE(HAVE_TIMESPEC64, 1,
 383                         ['struct timespec64' is available])
 384         ])
 385 ]) # LIBCFS_TIMESPEC64
 386
 387 #
 388 # Kernel version 3.17 introduced ktime_get_real_ts64
 389 #
 390 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_TS64],[
 391         LB2_LINUX_TEST_SRC([ktime_get_real_ts64], [
 392                 #include <linux/ktime.h>
 393         ],[
 394                 struct timespec64 *ts = NULL;
 395
 396                 ktime_get_real_ts64(ts);
 397         ])
 398 ])
 399 AC_DEFUN([LIBCFS_KTIME_GET_REAL_TS64],[
 400         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_real_ts64' exist],
 401         [ktime_get_real_ts64], [
 402                 AC_DEFINE(HAVE_KTIME_GET_REAL_TS64, 1,
 403                         ['ktime_get_real_ts64' is available])
 404         ])
 405 ]) # LIBCFS_KTIME_GET_REAL_TS64
 406
 407 #
 408 # Kernel version 3.17 introduced ktime_get_real_seconds
 409 #
 410 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_SECONDS],[
 411         LB2_LINUX_TEST_SRC([ktime_get_real_seconds], [
 412                 #include <linux/hrtimer.h>
 413                 #include <linux/ktime.h>
 414         ],[
 415                 time64_t now;
 416
 417                 now = ktime_get_real_seconds();
 418         ])
 419 ])
 420 AC_DEFUN([LIBCFS_KTIME_GET_REAL_SECONDS],[
 421         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_real_ts64' exist],
 422         [ktime_get_real_seconds], [
 423                 AC_DEFINE(HAVE_KTIME_GET_REAL_SECONDS, 1,
 424                         ['ktime_get_real_seconds' is available])
 425         ])
 426 ]) # LIBCFS_KTIME_GET_REAL_SECONDS
 427
 428 #
 429 # Kernel version 3.17 created ktime_get_ns wrapper
 430 #
 431 AC_DEFUN([LIBCFS_SRC_KTIME_GET_NS],[
 432         LB2_LINUX_TEST_SRC([ktime_get_ns], [
 433                 #include <linux/hrtimer.h>
 434                 #include <linux/ktime.h>
 435         ],[
 436                 u64 nanoseconds;
 437
 438                 nanoseconds = ktime_get_ns();
 439         ])
 440 ])
 441 AC_DEFUN([LIBCFS_KTIME_GET_NS],[
 442         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_ns' exist],
 443         [ktime_get_ns], [],[
 444                 AC_DEFINE(NEED_KTIME_GET_NS, 1,
 445                         ['ktime_get_ns' is not available])
 446         ])
 447 ]) # LIBCFS_KTIME_GET_NS
 448
 449 #
 450 # Kernel version 3.17 created ktime_get_real_ns wrapper
 451 #
 452 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_NS],[
 453         LB2_LINUX_TEST_SRC([ktime_get_real_ns], [
 454                 #include <linux/hrtimer.h>
 455                 #include <linux/ktime.h>
 456         ],[
 457                 u64 nanoseconds;
 458
 459                 nanoseconds = ktime_get_real_ns();
 460         ])
 461 ])
 462 AC_DEFUN([LIBCFS_KTIME_GET_REAL_NS],[
 463         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_real_ns' exist],
 464         [ktime_get_real_ns], [],[
 465                 AC_DEFINE(NEED_KTIME_GET_REAL_NS, 1,
 466                         ['ktime_get_real_ns' is not available])
 467         ])
 468 ]) # LIBCFS_KTIME_GET_REAL_NS
 469
 470 #
 471 # Kernel version 3.17 introduced ktime_to_timespec64
 472 #
 473 AC_DEFUN([LIBCFS_SRC_KTIME_TO_TIMESPEC64],[
 474         LB2_LINUX_TEST_SRC([ktime_to_timespec64], [
 475                 #include <linux/hrtimer.h>
 476                 #include <linux/ktime.h>
 477         ],[
 478                 ktime_t now = ktime_set(0, 0);
 479                 struct timespec64 ts;
 480
 481                 ts = ktime_to_timespec64(now);
 482         ])
 483 ])
 484 AC_DEFUN([LIBCFS_KTIME_TO_TIMESPEC64],[
 485         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_to_timespec64' exist],
 486         [ktime_to_timespec64], [
 487                 AC_DEFINE(HAVE_KTIME_TO_TIMESPEC64, 1,
 488                         ['ktime_to_timespec64' is available])
 489         ])
 490 ]) # LIBCFS_KTIME_TO_TIMESPEC64
 491
 492 #
 493 # Kernel version 3.17 introduced timespec64_sub
 494 #
 495 AC_DEFUN([LIBCFS_SRC_TIMESPEC64_SUB],[
 496         LB2_LINUX_TEST_SRC([timespec64_sub], [
 497                 #include <linux/time.h>
 498         ],[
 499                 struct timespec64 later = { }, earlier = { }, diff;
 500
 501                 diff = timespec64_sub(later, earlier);
 502         ])
 503 ])
 504 AC_DEFUN([LIBCFS_TIMESPEC64_SUB],[
 505         LB2_MSG_LINUX_TEST_RESULT([does function 'timespec64_sub' exist],
 506         [timespec64_sub], [
 507                 AC_DEFINE(HAVE_TIMESPEC64_SUB, 1,
 508                         ['timespec64_sub' is available])
 509         ])
 510 ]) # LIBCFS_TIMESPEC64_SUB
 511
 512 #
 513 # Kernel version 3.17 introduced timespec64_to_ktime
 514 #
 515 AC_DEFUN([LIBCFS_SRC_TIMESPEC64_TO_KTIME],[
 516         LB2_LINUX_TEST_SRC([timespec64_to_ktime], [
 517         #include <linux/ktime.h>
 518         ],[
 519                 struct timespec64 ts;
 520                 ktime_t now;
 521
 522                 now = timespec64_to_ktime(ts);
 523         ])
 524 ])
 525 AC_DEFUN([LIBCFS_TIMESPEC64_TO_KTIME],[
 526         LB2_MSG_LINUX_TEST_RESULT([does function 'timespec64_to_ktime' exist],
 527         [timespec64_to_ktime], [
 528                 AC_DEFINE(HAVE_TIMESPEC64_TO_KTIME, 1,
 529                         ['timespec64_to_ktime' is available])
 530         ])
 531 ]) # LIBCFS_TIMESPEC64_TO_KTIME
 532
 533 #
 534 # Kernel version 3.19 introduced ktime_get_seconds
 535 #
 536 AC_DEFUN([LIBCFS_SRC_KTIME_GET_SECONDS],[
 537         LB2_LINUX_TEST_SRC([ktime_get_seconds], [
 538                 #include <linux/ktime.h>
 539         ],[
 540                 time64_t now;
 541
 542                 now = ktime_get_seconds();
 543         ])
 544 ])
 545 AC_DEFUN([LIBCFS_KTIME_GET_SECONDS],[
 546         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_get_seconds' exist],
 547         [ktime_get_seconds], [
 548                 AC_DEFINE(HAVE_KTIME_GET_SECONDS, 1,
 549                         ['ktime_get_seconds' is available])
 550         ])
 551 ]) # LIBCFS_KTIME_GET_SECONDS
 552
 553 #
 554 # Kernel version 3.19 commit v3.18-rc2-26-g61ada528dea0
 555 # introduce wait_woken()
 556 #
 557 AC_DEFUN([LIBCFS_SRC_WAIT_WOKEN],[
 558         LB2_LINUX_TEST_SRC([wait_woken], [
 559                 #include <linux/wait.h>
 560         ],[
 561                 wait_woken(NULL, 0, 0);
 562         ])
 563 ])
 564 AC_DEFUN([LIBCFS_WAIT_WOKEN],[
 565         LB2_MSG_LINUX_TEST_RESULT([does function 'wait_woken' exist],
 566         [wait_woken], [
 567                 AC_DEFINE(HAVE_WAIT_WOKEN, 1,
 568                         ['wait_woken, is available'])
 569         ])
 570 ]) # LIBCFS_WAIT_WOKEN
 571
 572 #
 573 # Kernel version 4.0 commit 41fbf3b39d5eca01527338b4d0ee15ee1ae1023c
 574 # introduced the helper function ktime_ms_delta.
 575 #
 576 AC_DEFUN([LIBCFS_SRC_KTIME_MS_DELTA],[
 577         LB2_LINUX_TEST_SRC([ktime_ms_delta], [
 578                 #include <linux/ktime.h>
 579         ],[
 580                 ktime_t start = ktime_set(0, 0);
 581                 ktime_t end = start;
 582
 583                 ktime_ms_delta(start, end);
 584         ])
 585 ])
 586 AC_DEFUN([LIBCFS_KTIME_MS_DELTA],[
 587         LB2_MSG_LINUX_TEST_RESULT([does function 'ktime_ms_delta' exist],
 588         [ktime_ms_delta], [
 589                 AC_DEFINE(HAVE_KTIME_MS_DELTA, 1,
 590                         ['ktime_ms_delta' is available])
 591         ])
 592 ]) # LIBCFS_KTIME_MS_DELTA
 593
 594 #
 595 # Kernel version 4.1 commit b51d23e4e9fea6f264d39535c2a62d1f51e7ccc3
 596 # create per module locks which added kernel_param_[un]lock(). Older
 597 # kernels you have to use __kernel_param_[un]lock(). In that case its
 598 # a global lock for all modules but that is okay since its a rare event.
 599 #
 600 AC_DEFUN([LIBCFS_SRC_KERNEL_PARAM_LOCK],[
 601         LB2_LINUX_TEST_SRC([kernel_param_lock], [
 602                 #include <linux/moduleparam.h>
 603         ],[
 604                 kernel_param_lock(NULL);
 605                 kernel_param_unlock(NULL);
 606         ])
 607 ])
 608 AC_DEFUN([LIBCFS_KERNEL_PARAM_LOCK],[
 609         LB2_MSG_LINUX_TEST_RESULT([does function 'kernel_param_[un]lock' exist],
 610         [kernel_param_lock], [
 611                 AC_DEFINE(HAVE_KERNEL_PARAM_LOCK, 1,
 612                         ['kernel_param_[un]lock' is available])
 613         ])
 614 ]) # LIBCFS_KERNEL_PARAM_LOCK
 615
 616 #
 617 # LIBCFS_STRSCPY_EXISTS
 618 #
 619 # Linux commit v4.2-rc1-2-g30035e45753b
 620 #  string: provide strscpy()
 621 #
 622 # If strscpy exists, prefer it over strlcpy
 623 #
 624 AC_DEFUN([LIBCFS_SRC_STRSCPY_EXISTS], [
 625         LB2_LINUX_TEST_SRC([strscpy_exists], [
 626                 #include <linux/string.h>
 627         ],[
 628                 char buf[129];
 629
 630                 strscpy(buf, "something", sizeof(buf));
 631         ],[-Werror])
 632 ])
 633 AC_DEFUN([LIBCFS_STRSCPY_EXISTS], [
 634         LB2_MSG_LINUX_TEST_RESULT([if kernel strscpy is available],
 635         [strscpy_exists], [
 636                 AC_DEFINE(HAVE_STRSCPY, 1,
 637                         [kernel strscpy is available])
 638         ])
 639 ]) # LIBCFS_STRSCPY_EXISTS
 640
 641 #
 642 # Kernel version 4.2 changed topology_thread_cpumask
 643 # to topology_sibling_cpumask
 644 #
 645 AC_DEFUN([LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 646         LB2_LINUX_TEST_SRC([topology_sibling_cpumask], [
 647                 #include <linux/topology.h>
 648         ],[
 649                 const struct cpumask *mask;
 650
 651                 mask = topology_sibling_cpumask(0);
 652         ])
 653 ])
 654 AC_DEFUN([LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 655         LB2_MSG_LINUX_TEST_RESULT([does function 'topology_sibling_cpumask' exist],
 656         [topology_sibling_cpumask], [
 657                 AC_DEFINE(HAVE_TOPOLOGY_SIBLING_CPUMASK, 1,
 658                         [topology_sibling_cpumask is available])
 659         ])
 660 ]) # LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
 661
 662 #
 663 # Kernel version 4.4 commit ef951599074ba4fad2d0efa0a977129b41e6d203
 664 # introduced kstrtobool and kstrtobool_from_user.
 665 #
 666 AC_DEFUN([LIBCFS_SRC_KSTRTOBOOL_FROM_USER], [
 667         LB2_LINUX_TEST_SRC([kstrtobool_from_user], [
 668                 #include <linux/kernel.h>
 669         ],[
 670                 bool result;
 671                 return kstrtobool_from_user(NULL, 0, &result);
 672         ])
 673 ])
 674 AC_DEFUN([LIBCFS_KSTRTOBOOL_FROM_USER], [
 675         LB2_MSG_LINUX_TEST_RESULT([if Linux kernel has 'kstrtobool_from_user'],
 676         [kstrtobool_from_user], [
 677                 AC_DEFINE(HAVE_KSTRTOBOOL_FROM_USER, 1,
 678                         [kernel has kstrtobool_from_user])
 679         ])
 680 ]) # LIBCFS_KSTRTOBOOL_FROM_USER
 681
 682 #
 683 # LIBCFS_NETLINK_CALLBACK_START
 684 #
 685 # Kernel version 4.4-rc3 commit fc9e50f5a5a4e1fa9ba2756f745a13e693cf6a06
 686 # added a start function callback for struct netlink_callback
 687 #
 688 AC_DEFUN([LIBCFS_SRC_NETLINK_CALLBACK_START], [
 689         LB2_LINUX_TEST_SRC([cb_start], [
 690                 #include <net/genetlink.h>
 691         ],[
 692                 struct genl_ops ops;
 693
 694                 ops.start = NULL;
 695         ],[])
 696 ])
 697 AC_DEFUN([LIBCFS_NETLINK_CALLBACK_START], [
 698         LB2_MSG_LINUX_TEST_RESULT([if struct genl_ops has start callback],
 699         [cb_start], [
 700                 AC_DEFINE(HAVE_NETLINK_CALLBACK_START, 1,
 701                         [struct genl_ops has 'start' callback])
 702         ])
 703 ]) # LIBCFS_NETLINK_CALLBACK_START
 704
 705 #
 706 # Kernel version 4.5-rc1 commit d12481bc58fba89427565f8592e88446ec084a24
 707 # added crypto hash helpers
 708 #
 709 AC_DEFUN([LIBCFS_SRC_CRYPTO_HASH_HELPERS], [
 710         LB2_LINUX_TEST_SRC([crypto_hash_helpers], [
 711                 #include <crypto/hash.h>
 712         ],[
 713                 crypto_ahash_alg_name(NULL);
 714                 crypto_ahash_driver_name(NULL);
 715         ])
 716 ])
 717 AC_DEFUN([LIBCFS_CRYPTO_HASH_HELPERS], [
 718         LB2_MSG_LINUX_TEST_RESULT([does crypto hash helper functions exist],
 719         [crypto_hash_helpers], [
 720                 AC_DEFINE(HAVE_CRYPTO_HASH_HELPERS, 1,
 721                         [crypto hash helper functions are available])
 722         ])
 723 ]) # LIBCFS_CRYPTO_HASH_HELPERS
 724
 725 #
 726 # Kernel version 4.5-rc1 commit 3502cad73c4bbf8f6365d539e814159275252c59
 727 # introduced rhashtable_replace_fast
 728 #
 729 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_REPLACE], [
 730         LB2_LINUX_TEST_SRC([rhashtable_replace_fast], [
 731                 #include <linux/rhashtable.h>
 732         ],[
 733                 const struct rhashtable_params params = { 0 };
 734
 735                 rhashtable_replace_fast(NULL, NULL, NULL, params);
 736         ])
 737 ])
 738 AC_DEFUN([LIBCFS_RHASHTABLE_REPLACE], [
 739         LB2_MSG_LINUX_TEST_RESULT([if 'rhashtable_replace_fast' exists],
 740         [rhashtable_replace_fast], [
 741                 AC_DEFINE(HAVE_RHASHTABLE_REPLACE, 1,
 742                         [rhashtable_replace_fast() is available])
 743         ])
 744 ]) # LIBCFS_RHASHTABLE_REPLACE
 745
 746 #
 747 # Kernel version 4.5-rc3 commit 2fe829aca9d7bed5fd6b49c6a1452e5e486b6cc3dd
 748 # made kset_find_obj() exportable to modules
 749 #
 750 AC_DEFUN([LIBCFS_EXPORT_KSET_FIND_OBJ], [
 751 LB_CHECK_EXPORT([kset_find_obj], [lib/kobject.c],
 752         [AC_DEFINE(HAVE_KSET_FIND_OBJ, 1,
 753                 [kset_find_obj is exported by the kernel])])
 754 ]) # LIBCFS_EXPORT_KSET_FIND_OBJ
 755
 756 #
 757 # Kernel version 4.6+ commit ef703f49a6c5b909a85149bb6625c4ed0d697186
 758 # fixed the brokenness of hash_64(). The fix removed GOLDEN_RATIO_PRIME_64
 759 # since it was a poor prime value.
 760 #
 761 AC_DEFUN([LIBCFS_SRC_BROKEN_HASH_64], [
 762         LB2_LINUX_TEST_SRC([broken_hash_64], [
 763         #include <linux/hash.h>
 764         ],[
 765                 int tmp = GOLDEN_RATIO_PRIME_64;
 766         ])
 767 ])
 768 AC_DEFUN([LIBCFS_BROKEN_HASH_64], [
 769         LB2_MSG_LINUX_TEST_RESULT([kernel has fixed hash_64()],
 770         [broken_hash_64], [
 771                 AC_DEFINE(HAVE_BROKEN_HASH_64, 1, [kernel hash_64() is broken])
 772         ])
 773 ]) # LIBCFS_BROKEN_HASH_64
 774
 775 #
 776 # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 777 #
 778 # linux 4.6 kernel changed stacktrace_ops address to return an int
 779 #
 780 AC_DEFUN([LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 781         LB2_LINUX_TEST_SRC([stacktrace_ops_address_return_int], [
 782                 #include <asm/stacktrace.h>
 783         ],[
 784                 int rc;
 785
 786                 rc = ((struct stacktrace_ops *)0)->address(NULL, 0, 0);
 787         ])
 788 ])
 789 AC_DEFUN([LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 790         LB2_MSG_LINUX_TEST_RESULT([if 'struct stacktrace_ops' address function returns an int],
 791         [stacktrace_ops_address_return_int], [
 792                 AC_DEFINE(STACKTRACE_OPS_ADDRESS_RETURN_INT, 1,
 793                         ['struct stacktrace_ops' address function returns an int])
 794         ])
 795 ]) # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 796
 797 #
 798 # Kernel version 4.6 removed both struct task_struct and struct mm_struct
 799 # arguments to get_user_pages
 800 #
 801 AC_DEFUN([LIBCFS_SRC_GET_USER_PAGES_6ARG], [
 802         LB2_LINUX_TEST_SRC([get_user_pages_6arg], [
 803                 #include <linux/mm.h>
 804         ],[
 805                 int rc;
 806
 807                 rc = get_user_pages(0, 0, 0, 0, NULL, NULL);
 808         ])
 809 ])
 810 AC_DEFUN([LIBCFS_GET_USER_PAGES_6ARG], [
 811         LB2_MSG_LINUX_TEST_RESULT([if 'get_user_pages()' takes 6 arguments],
 812         [get_user_pages_6arg], [
 813                 AC_DEFINE(HAVE_GET_USER_PAGES_6ARG, 1,
 814                         [get_user_pages takes 6 arguments])
 815         ])
 816 ]) # LIBCFS_GET_USER_PAGES_6ARG
 817
 818 #
 819 # LIBCFS_STRINGHASH
 820 #
 821 # 4.6 kernel created stringhash.h which moved stuff out of dcache.h
 822 # commit f4bcbe792b8f434e32487cff9d9e30ab45a3ce02
 823 #
 824 AC_DEFUN([LIBCFS_SRC_STRINGHASH], [
 825         LB2_CHECK_LINUX_HEADER_SRC([linux/stringhash.h], [-Werror])
 826 ])
 827 AC_DEFUN([LIBCFS_STRINGHASH], [
 828         LB2_CHECK_LINUX_HEADER_RESULT([linux/stringhash.h], [
 829                 AC_DEFINE(HAVE_STRINGHASH, 1,
 830                         [stringhash.h is present])
 831         ])
 832 ]) # LIBCFS_STRINGHASH
 833
 834 #
 835 # LIBCFS_RHASHTABLE_INSERT_FAST
 836 #
 837 # 4.7+ kernel commit 5ca8cc5bf11faed257c762018aea9106d529232f
 838 # changed __rhashtable_insert_fast to support the new function
 839 # rhashtable_lookup_get_insert_key().
 840 #
 841 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_INSERT_FAST], [
 842         LB2_LINUX_TEST_SRC([rhashtable_insert_fast], [
 843                 #include <linux/rhashtable.h>
 844         ],[
 845                 const struct rhashtable_params params = { 0 };
 846                 int rc;
 847
 848                 rc = __rhashtable_insert_fast(NULL, NULL, NULL, params);
 849         ],
 850         [-Werror])
 851 ])
 852 AC_DEFUN([LIBCFS_RHASHTABLE_INSERT_FAST], [
 853         LB2_MSG_LINUX_TEST_RESULT([if internal '__rhashtable_insert_fast()' returns int],
 854         [rhashtable_insert_fast], [
 855                 AC_DEFINE(HAVE_HASHTABLE_INSERT_FAST_RETURN_INT, 1,
 856                           ['__rhashtable_insert_fast()' returns int])
 857         ])
 858 ]) # LIBCFS_RHASHTABLE_INSERT_FAST
 859
 860 #
 861 # LIBCFS_HAVE_NR_ZONE_WRITE_PENDING
 862 #
 863 # kernel v4.7-5966-g5a1c84b404a7
 864 # mm: remove reclaim and compaction retry approximations
 865 #
 866 AC_DEFUN([LIBCFS_SRC_HAVE_NR_ZONE_WRITE_PENDING], [
 867         LB2_LINUX_TEST_SRC([nr_zone_write_pending_exists], [
 868                 #include <linux/mmzone.h>
 869         ],[
 870                 enum zone_stat_item item = NR_ZONE_WRITE_PENDING;
 871                 (void)item;
 872         ],[-Werror])
 873 ])
 874 AC_DEFUN([LIBCFS_HAVE_NR_ZONE_WRITE_PENDING], [
 875         LB2_MSG_LINUX_TEST_RESULT([if NR_ZONE_WRITE_PENDING is available],
 876         [nr_zone_write_pending_exists], [
 877                 AC_DEFINE(HAVE_NR_ZONE_WRITE_PENDING, 1,
 878                         [NR_ZONE_WRITE_PENDING is still in use.])
 879         ])
 880 ]) # LIBCFS_HAVE_NR_ZONE_WRITE_PENDING
 881
 882 #
 883 # Kernel version 4.7-rc1 commit 8f6fd83c6c5ec66a4a70c728535ddcdfef4f3697
 884 # added 3rd arg to rhashtable_walk_init
 885 #
 886 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG], [
 887         LB2_LINUX_TEST_SRC([rhashtable_walk_init], [
 888                 #include <linux/gfp.h>
 889                 #include <linux/rhashtable.h>
 890         ],[
 891                 rhashtable_walk_init(NULL, NULL, GFP_KERNEL);
 892         ])
 893 ])
 894 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_INIT_3ARG], [
 895         LB2_MSG_LINUX_TEST_RESULT([if 'rhashtable_walk_init' has 3 args],
 896         [rhashtable_walk_init], [
 897                 AC_DEFINE(HAVE_3ARG_RHASHTABLE_WALK_INIT, 1,
 898                         [rhashtable_walk_init() has 3 args])
 899         ])
 900 ]) # LIBCFS_RHASHTABLE_WALK_INIT_3ARG
 901
 902 #
 903 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 904 # introduced rhashtable_lookup
 905 #
 906 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_LOOKUP], [
 907         LB2_LINUX_TEST_SRC([rhashtable_lookup], [
 908                 #include <linux/rhashtable.h>
 909         ],[
 910                 const struct rhashtable_params params = { 0 };
 911                 void *ret;
 912
 913                 ret = rhashtable_lookup(NULL, NULL, params);
 914         ])
 915 ])
 916 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP], [
 917         LB2_MSG_LINUX_TEST_RESULT([if 'rhashtable_lookup' exist],
 918         [rhashtable_lookup], [
 919                 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP, 1,
 920                         [rhashtable_lookup() is available])
 921         ])
 922 ]) # LIBCFS_RHASHTABLE_LOOKUP
 923
 924 #
 925 # LIBCFS_RHLTABLE
 926 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 927 # created the rhlist interface to allow inserting duplicate objects
 928 # into the same table.
 929 #
 930 AC_DEFUN([LIBCFS_SRC_RHLTABLE], [
 931         LB2_LINUX_TEST_SRC([rhtable], [
 932                 #include <linux/rhashtable.h>
 933         ],[
 934                 struct rhltable *hlt = NULL;
 935
 936                 rhltable_destroy(hlt);
 937         ])
 938 ])
 939 AC_DEFUN([LIBCFS_RHLTABLE], [
 940         LB2_MSG_LINUX_TEST_RESULT([does 'struct rhltable' exist],
 941         [rhtable], [
 942                 AC_DEFINE(HAVE_RHLTABLE, 1, [struct rhltable exist])
 943         ])
 944 ]) # LIBCFS_RHLTABLE
 945
 946 #
 947 # LIBCFS_STACKTRACE_OPS
 948 #
 949 # Kernel version 4.8 commit c8fe4609827aedc9c4b45de80e7cdc8ccfa8541b
 950 # removed both struct stacktrace_ops and dump_trace() function
 951 #
 952 AC_DEFUN([LIBCFS_SRC_STACKTRACE_OPS], [
 953         LB2_LINUX_TEST_SRC([stacktrace_ops], [
 954                 struct task_struct;
 955                 struct pt_regs;
 956                 #include <asm/stacktrace.h>
 957         ],[
 958                 struct stacktrace_ops ops;
 959                 ops.stack = NULL;
 960         ])
 961 ])
 962 AC_DEFUN([LIBCFS_STACKTRACE_OPS], [
 963 LB2_MSG_LINUX_TEST_RESULT([if 'struct stacktrace_ops' exists],
 964         [stacktrace_ops], [
 965                 AC_DEFINE(HAVE_STACKTRACE_OPS, 1,
 966                         [struct stacktrace_ops exists])
 967         ])
 968 ]) # LIBCFS_STACKTRACE_OPS
 969
 970 #
 971 # LIBCFS_RHASHTABLE_WALK_ENTER
 972 #
 973 # Kernel version 4.9-rc1 commit 246779dd090bd1b74d2652b3a6ca7759f593b27a
 974 # introduced rhashtable_walk_enter
 975 #
 976 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_WALK_ENTER], [
 977         LB2_LINUX_TEST_SRC([rhashtable_walk_enter], [
 978                 #include <linux/rhashtable.h>
 979         ],[
 980                 rhashtable_walk_enter(NULL, NULL);
 981         ])
 982 ])
 983 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_ENTER], [
 984         LB2_MSG_LINUX_TEST_RESULT([if 'rhashtable_walk_enter' exists],
 985         [rhashtable_walk_enter], [
 986                 AC_DEFINE(HAVE_RHASHTABLE_WALK_ENTER, 1,
 987                         [rhashtable_walk_enter() is available])
 988         ])
 989 ]) # LIBCFS_RHASHTABLE_WALK_ENTER
 990
 991 #
 992 # Kernel version 4.9 commit 768ae309a96103ed02eb1e111e838c87854d8b51
 993 # mm: replace get_user_pages() write/force parameters with gup_flags
 994 #
 995 AC_DEFUN([LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS], [
 996         LB2_LINUX_TEST_SRC([get_user_pages_gup_flags], [
 997                 #include <linux/mm.h>
 998         ],[
 999                 int rc;
1000                 rc = get_user_pages(0, 0, FOLL_WRITE, NULL, NULL);
1001         ])
1002 ])
1003 AC_DEFUN([LIBCFS_GET_USER_PAGES_GUP_FLAGS], [
1004         LB2_MSG_LINUX_TEST_RESULT([if 'get_user_pages()' takes gup_flags in arguments],
1005         [get_user_pages_gup_flags], [
1006                 AC_DEFINE(HAVE_GET_USER_PAGES_GUP_FLAGS, 1,
1007                         [get_user_pages takes gup_flags in arguments])
1008                 ])
1009 ]) # LIBCFS_GET_USER_PAGES_GUP_FLAGS
1010
1011 #
1012 # LIBCFS_HOTPLUG_STATE_MACHINE
1013 #
1014 # Linux commit v4.9-12227-g7b737965b331 introduced
1015 #   staging/lustre/libcfs: Convert to hotplug state machine
1016 #   Which introduced: CPUHP_LUSTRE_CFS_DEAD
1017 #
1018 # Linux commit v4.10-rc1-5-g4205e4786d0b
1019 #   cpu/hotplug: Provide dynamic range for prepare stage
1020 #   Which introduced: CPUHP_BP_PREPARE_DYN
1021 #
1022 # Linux commit v6.7-rc2-1-g15bece7bec0d
1023 #   cpu/hotplug: Remove unused CPU hotplug states
1024 #   Which removed: CPUHP_LUSTRE_CFS_DEAD
1025 #
1026 # With no distro kernels between 4.10 and 4.11 switch to CPUHP_BP_PREPARE_DYN
1027 #
1028 AC_DEFUN([LIBCFS_SRC_HOTPLUG_STATE_MACHINE], [
1029         LB2_LINUX_TEST_SRC([cpu_hotplug_state_machine], [
1030                 #include <linux/cpuhotplug.h>
1031         ],[
1032                 cpuhp_remove_state(CPUHP_BP_PREPARE_DYN);
1033         ])
1034 ])
1035 AC_DEFUN([LIBCFS_HOTPLUG_STATE_MACHINE], [
1036         LB2_MSG_LINUX_TEST_RESULT([if libcfs supports CPU hotplug state machine],
1037         [cpu_hotplug_state_machine], [
1038                 AC_DEFINE(HAVE_HOTPLUG_STATE_MACHINE, 1,
1039                         [hotplug state machine is supported])
1040         ])
1041 ]) # LIBCFS_HOTPLUG_STATE_MACHINE
1042
1043 #
1044 # LIBCFS_REFCOUNT_T
1045 #
1046 # Kernel version 4.10-rc3 commit f405df5de3170c00e5c54f8b7cf4766044a032ba
1047 # introduced refcount_t which is atomic_t plus over flow guards.
1048 #
1049 AC_DEFUN([LIBCFS_SRC_REFCOUNT_T], [
1050         LB2_CHECK_LINUX_HEADER_SRC([linux/refcount.h], [-Werror])
1051 ])
1052 AC_DEFUN([LIBCFS_REFCOUNT_T], [
1053         LB2_CHECK_LINUX_HEADER_RESULT([linux/refcount.h], [
1054                 AC_DEFINE(HAVE_REFCOUNT_T, 1,
1055                         [refcount_t is supported])
1056         ])
1057 ]) # LIBCFS_REFCOUNT_T
1058
1059 #
1060 # Kernel version 4.12 commit 499118e966f1d2150bd66647c8932343c4e9a0b8
1061 # introduce memalloc_noreclaim_{save,restore}
1062 #
1063 AC_DEFUN([LIBCFS_SRC_MEMALLOC_NORECLAIM], [
1064         LB2_LINUX_TEST_SRC([memalloc_noreclaim], [
1065                 #include <linux/sched/mm.h>
1066         ],[
1067                 int flag = memalloc_noreclaim_save();
1068                 memalloc_noreclaim_restore(flag);
1069         ])
1070 ])
1071 AC_DEFUN([LIBCFS_MEMALLOC_NORECLAIM], [
1072         LB2_MSG_LINUX_TEST_RESULT([if memalloc_noreclaim_{save,restore} exist],
1073         [memalloc_noreclaim], [
1074                 AC_DEFINE(HAVE_MEMALLOC_RECLAIM, 1,
1075                         [memalloc_noreclaim_{save,restore}() is supported])
1076         ])
1077 ]) # LIBCFS_MEMALLOC_NORECLAIM
1078
1079 #
1080 # LIBCFS_SCHED_HEADERS
1081 #
1082 # 4.11 has broken up sched.h into more headers.
1083 #
1084 AC_DEFUN([LIBCFS_SRC_SCHED_HEADERS], [
1085         LB2_CHECK_LINUX_HEADER_SRC([linux/sched/signal.h], [-Werror])
1086 ])
1087 AC_DEFUN([LIBCFS_SCHED_HEADERS], [
1088         LB2_CHECK_LINUX_HEADER_RESULT([linux/sched/signal.h], [
1089                 AC_DEFINE(HAVE_SCHED_HEADERS, 1,
1090                         [linux/sched header directory exist])
1091         ])
1092 ]) # LIBCFS_SCHED_HEADERS
1093
1094 #
1095 # Kernel version 4.11-rc1 commit 2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e
1096 # introduce kref_read
1097 #
1098 AC_DEFUN([LIBCFS_SRC_KREF_READ], [
1099         LB2_LINUX_TEST_SRC([kref_read], [
1100                 #include <linux/kref.h>
1101         ],[
1102                 kref_read(NULL);
1103         ])
1104 ])
1105 AC_DEFUN([LIBCFS_KREF_READ], [
1106         LB2_MSG_LINUX_TEST_RESULT([if 'kref_read' exists],
1107         [kref_read], [
1108                 AC_DEFINE(HAVE_KREF_READ, 1, [kref_read() is available])
1109         ])
1110 ]) # LIBCFS_KREF_READ
1111
1112 #
1113 # Kernel version 4.11-rc1 commit da20420f83ea0fbcf3d03afda08d971ea1d8a356
1114 # introduced rht_bucket_var
1115 #
1116 AC_DEFUN([LIBCFS_SRC_RHT_BUCKET_VAR], [
1117         LB2_LINUX_TEST_SRC([rht_bucket_var], [
1118                 #include <linux/rhashtable.h>
1119         ],[
1120                 rht_bucket_var(NULL, 0);
1121         ])
1122 ])
1123 AC_DEFUN([LIBCFS_RHT_BUCKET_VAR], [
1124         LB2_MSG_LINUX_TEST_RESULT([if 'rht_bucket_var' exists],
1125         [rht_bucket_var], [
1126                 AC_DEFINE(HAVE_RHT_BUCKET_VAR, 1,
1127                         [rht_bucket_var() is available])
1128         ])
1129 ]) # LIBCFS_RHT_BUCKET_VAR
1130
1131 #
1132 # Kernel version 4.11-rc5 commit fceb6435e85298f747fee938415057af837f5a8a
1133 # began the enhanchement of Netlink with extended ACK struct for advanced
1134 # error handling. By commit 7ab606d1609dd6dfeae9c8ad0a8a4e051d831e46 we
1135 # had full support for this new feature.
1136 #
1137 AC_DEFUN([LIBCFS_SRC_NL_EXT_ACK], [
1138         LB2_LINUX_TEST_SRC([netlink_ext_ack], [
1139                 #include <net/genetlink.h>
1140         ],[
1141                 struct genl_info info;
1142
1143                 info.extack = NULL;
1144         ])
1145 ])
1146 AC_DEFUN([LIBCFS_NL_EXT_ACK], [
1147         LB2_MSG_LINUX_TEST_RESULT([if Netlink supports netlink_ext_ack],
1148         [netlink_ext_ack], [
1149                 AC_DEFINE(HAVE_NL_PARSE_WITH_EXT_ACK, 1,
1150                         [netlink_ext_ack is an argument to nla_parse type function])
1151         ])
1152 ]) # LIBCFS_NL_EXT_ACK
1153
1154 #
1155 # Kernel version 4.11 commit f9fe1c12d126f9887441fa5bb165046f30ddd4b5
1156 # introduced rhashtable_lookup_get_insert_fast
1157 #
1158 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
1159         LB2_LINUX_TEST_SRC([rhashtable_lookup_get_insert_fast], [
1160                 #include <linux/rhashtable.h>
1161         ],[
1162                 const struct rhashtable_params params = { 0 };
1163                 void *ret;
1164
1165                 ret = rhashtable_lookup_get_insert_fast(NULL, NULL, params);
1166         ])
1167 ])
1168 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
1169         LB2_MSG_LINUX_TEST_RESULT([if 'rhashtable_lookup_get_insert_fast' exist],
1170         [rhashtable_lookup_get_insert_fast], [
1171                 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP_GET_INSERT_FAST, 1,
1172                         [rhashtable_lookup_get_insert_fast() is available])
1173         ])
1174 ]) # LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
1175
1176 #
1177 # Kernel version 4.12-rc2 8f553c498e1772cccb39a114da4a498d22992758
1178 # provide proper CPU hotplug locking
1179 #
1180 AC_DEFUN([LIBCFS_SRC_CPUS_READ_LOCK], [
1181         LB2_LINUX_TEST_SRC([cpu_read_lock], [
1182                 #include <linux/cpu.h>
1183         ],[
1184                 cpus_read_lock();
1185                 cpus_read_unlock();
1186         ])
1187 ])
1188 AC_DEFUN([LIBCFS_CPUS_READ_LOCK], [
1189         LB2_MSG_LINUX_TEST_RESULT([if 'cpus_read_[un]lock' exist],
1190         [cpu_read_lock], [
1191                 AC_DEFINE(HAVE_CPUS_READ_LOCK, 1, ['cpus_read_lock' exist])
1192         ])
1193 ]) # LIBCFS_CPUS_READ_LOCK
1194
1195 #
1196 # LIBCFS_HAVE_PROCESSOR_HEADER
1197 #
1198 # Kernel version 4.12-rc3 commit fd851a3cdc196bfc1d229b5f22369069af532bf8
1199 # introduce processor.h
1200 #
1201 AC_DEFUN([LIBCFS_SRC_HAVE_PROCESSOR_HEADER], [
1202         LB2_CHECK_LINUX_HEADER_SRC([linux/processor.h], [-Werror])
1203 ])
1204 AC_DEFUN([LIBCFS_HAVE_PROCESSOR_HEADER], [
1205         LB2_CHECK_LINUX_HEADER_RESULT([linux/processor.h], [
1206                 AC_DEFINE(HAVE_PROCESSOR_H, 1,
1207                         [processor.h is present])
1208         ],[])
1209 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
1210
1211 #
1212 # LIBCFS_HAVE_WAIT_BIT_HEADER
1213 #
1214 # Kernel verison 4.12-rc6 commit 5dd43ce2f69d42a71dcacdb13d17d8c0ac1fe8f7
1215 # created wait_bit.h
1216 #
1217 AC_DEFUN([LIBCFS_SRC_HAVE_WAIT_BIT_HEADER], [
1218         LB2_CHECK_LINUX_HEADER_SRC([linux/wait_bit.h], [-Werror])
1219 ])
1220 AC_DEFUN([LIBCFS_HAVE_WAIT_BIT_HEADER], [
1221         LB2_CHECK_LINUX_HEADER_RESULT([linux/wait_bit.h], [
1222                 AC_DEFINE(HAVE_WAIT_BIT_HEADER_H, 1,
1223                         [wait_bit.h is present])
1224         ],[])
1225 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
1226
1227 #
1228 # Kernel version 4.12-rc6 commmit 2055da97389a605c8a00d163d40903afbe413921
1229 # changed:
1230 #       struct wait_queue_head::task_list       => ::head
1231 #       struct wait_queue_entry::task_list      => ::entry
1232 #
1233 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME], [
1234         LB2_LINUX_TEST_SRC([wait_queue_task_list], [
1235                 #include <linux/wait.h>
1236         ],[
1237                 wait_queue_head_t e;
1238
1239                 INIT_LIST_HEAD(&e.head);
1240         ])
1241 ])
1242 AC_DEFUN([LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME], [
1243         LB2_MSG_LINUX_TEST_RESULT([if linux wait_queue_head list_head is named head],
1244         [wait_queue_task_list], [
1245                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_LIST, 1,
1246                         [linux wait_queue_head_t list_head is name head])
1247         ])
1248 ]) # LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
1249
1250 #
1251 # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1252 #
1253 # Kernel version v4.12-rc6-23-g76c85ddc4695
1254 # sched/wait: Standardize wait_bit_queue naming
1255 #
1256 # renamed struct wait_bit_queue  => wait_bit_queue_entry
1257 #
1258 AC_DEFUN([LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1259         LB2_LINUX_TEST_SRC([struct_wait_bit_queue_entry_exists], [
1260                 #include <linux/wait.h>
1261                 #if HAVE_WAIT_BIT_HEADER_H
1262                         #include <linux/wait_bit.h>
1263                 #endif
1264         ],[
1265                 struct wait_bit_queue_entry entry;
1266                 memset(&entry, 0, sizeof(entry));
1267         ])
1268 ])
1269 AC_DEFUN([LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1270         LB2_MSG_LINUX_TEST_RESULT([if struct wait_bit_queue_entry exists],
1271         [struct_wait_bit_queue_entry_exists], [
1272                 AC_DEFINE(HAVE_WAIT_BIT_QUEUE_ENTRY, 1,
1273                         [if struct wait_bit_queue_entry exists])
1274         ])
1275 ]) # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1276
1277 #
1278 # LIBCFS_NLA_STRDUP
1279 #
1280 # Kernel version 4.13-rc1 commit 2cf0c8b3e6942ecafe6ebb1a6d0328a81641bf39
1281 # created nla_strdup(). This is needed since push strings can be
1282 # any size.
1283 #
1284 AC_DEFUN([LIBCFS_SRC_NLA_STRDUP], [
1285         LB2_LINUX_TEST_SRC([nla_strdup], [
1286                 #include <net/netlink.h>
1287         ],[
1288                 char *tmp = nla_strdup(NULL, GFP_KERNEL);
1289                 (void)tmp;
1290         ],[])
1291 ])
1292 AC_DEFUN([LIBCFS_NLA_STRDUP], [
1293         LB2_MSG_LINUX_TEST_RESULT([if 'nla_strdup()' exists],
1294         [nla_strdup], [
1295                 AC_DEFINE(HAVE_NLA_STRDUP, 1,
1296                         ['nla_strdup' is available])
1297         ])
1298 ]) # LIBCFS_NLA_STRDUP
1299
1300 #
1301 # LIBCFS_WAIT_QUEUE_ENTRY
1302 #
1303 # Kernel version 4.13 ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f
1304 # Rename wait_queue_t => wait_queue_entry_t
1305 #
1306 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_ENTRY], [
1307         LB2_LINUX_TEST_SRC([wait_queue_entry], [
1308                 #include <linux/wait.h>
1309         ],[
1310                 wait_queue_entry_t e;
1311
1312                 e.flags = 0;
1313         ])
1314 ])
1315 AC_DEFUN([LIBCFS_WAIT_QUEUE_ENTRY], [
1316         LB2_MSG_LINUX_TEST_RESULT([if 'wait_queue_entry_t' exists],
1317         [wait_queue_entry], [
1318                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY, 1,
1319                         ['wait_queue_entry_t' is available])
1320         ])
1321 ]) # LIBCFS_WAIT_QUEUE_ENTRY
1322
1323 #
1324 # LIBCFS_NEW_KERNEL_WRITE
1325 #
1326 # Kernel version 4.14 e13ec939e96b13e664bb6cee361cc976a0ee621a
1327 # changed kernel_write prototype to make is plug compatible
1328 # with the unexported vfs_write()
1329 #
1330 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_WRITE], [
1331         LB2_LINUX_TEST_SRC([kernel_write_match], [
1332                 #include <linux/fs.h>
1333         ],[
1334                 const void *buf = NULL;
1335                 loff_t pos = 0;
1336                 return kernel_write(NULL, buf, 0, &pos);
1337         ],[-Werror])
1338 ])
1339 AC_DEFUN([LIBCFS_NEW_KERNEL_WRITE], [
1340         LB2_MSG_LINUX_TEST_RESULT([if 'kernel_write' matches other read/write helpers],
1341         [kernel_write_match], [
1342                 AC_DEFINE(HAVE_NEW_KERNEL_WRITE, 1,
1343                         ['kernel_write' aligns with read/write helpers])
1344         ])
1345 ]) # LIBCFS_NEW_KERNEL_WRITE
1346
1347 #
1348 # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1349 #
1350 # kernel 5.0 commit ca79b0c211af63fa3276f0e3fd7dd9ada2439839
1351 # mm: convert totalram_pages and totalhigh_pages variables to atomic
1352 #
1353 AC_DEFUN([LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC], [
1354         LB2_LINUX_TEST_SRC([totalram_pages], [
1355                 #include <linux/mm.h>
1356         ],[
1357                 totalram_pages_inc();
1358         ],[-Werror])
1359 ])
1360 AC_DEFUN([LIBCFS_MM_TOTALRAM_PAGES_FUNC], [
1361         LB2_MSG_LINUX_TEST_RESULT([if totalram_pages is a function],
1362         [totalram_pages], [
1363                 AC_DEFINE(HAVE_TOTALRAM_PAGES_AS_FUNC, 1,
1364                         [if totalram_pages is a function])
1365         ])
1366 ]) # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1367
1368 #
1369 # LIBCFS_NEW_KERNEL_READ
1370 #
1371 # 4.14 commit bdd1d2d3d251c65b74ac4493e08db18971c09240 changed
1372 # the signature of kernel_read to match other read/write helpers
1373 # and place offset last.
1374 #
1375 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_READ], [
1376         LB2_LINUX_TEST_SRC([kernel_read], [
1377                 #include <linux/fs.h>
1378         ],[
1379                 loff_t pos = 0;
1380                 kernel_read(NULL, NULL, 0, &pos);
1381         ],[-Werror])
1382 ])
1383 AC_DEFUN([LIBCFS_NEW_KERNEL_READ], [
1384         LB2_MSG_LINUX_TEST_RESULT([if 'kernel_read()' has loff_t *pos as last parameter],
1385         [kernel_read], [
1386                 AC_DEFINE(HAVE_KERNEL_READ_LAST_POSP, 1,
1387                         [kernel_read() signature ends with loff_t *pos])
1388         ])
1389 ]) # LIBCFS_NEW_KERNEL_READ
1390
1391 #
1392 # LIBCFS_DEFINE_TIMER
1393 #
1394 # Kernel version 4.14 commit 1d27e3e2252ba9d949ca82fbdb73cde102cb2067
1395 # remove expires and data arguments from DEFINE_TIMER. Also the callback
1396 # when from using unsigned long argument to using struct timer_list pointer.
1397 #
1398 AC_DEFUN([LIBCFS_SRC_DEFINE_TIMER], [
1399         LB2_LINUX_TEST_SRC([define_timer], [
1400                 #include <linux/timer.h>
1401         ],[
1402                 static DEFINE_TIMER(my_timer, NULL);
1403         ])
1404 ])
1405 AC_DEFUN([LIBCFS_DEFINE_TIMER], [
1406         LB2_MSG_LINUX_TEST_RESULT([if DEFINE_TIMER takes only 2 arguments],
1407         [define_timer], [
1408                 AC_DEFINE(HAVE_NEW_DEFINE_TIMER, 1,
1409                         [DEFINE_TIMER uses only 2 arguements])
1410         ])
1411 ]) # LIBCFS_DEFINE_TIMER
1412
1413 #
1414 # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1415 #
1416 # Kernel 2.6.27 commit 8594698ebddeef5443b7da8258ae33b3eaca61d5
1417 # exported save_stack_trace_tsk for x86.
1418 # Kernel 2.6.27 commit 01f4b8b8b8db09b88be7df7e51192e4e678b69d3
1419 # exported save_stack_trace_tsk for powerpc
1420 # Kernel 4.13 commit e27c7fa015d61c8be6a2c32b2144aad2ae6ec975
1421 # exported save_stack_trace_tsk for arm64
1422 # Kernel 4.14 commit 9a3dc3186fc3795e076a4122da9e0258651a9631
1423 # exported save_stack_trace_tsk for arm
1424 #
1425 AC_DEFUN([LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK], [
1426 LB_CHECK_EXPORT([save_stack_trace_tsk], [arch/$SUBARCH/kernel/stacktrace.c],
1427         [AC_DEFINE(HAVE_SAVE_STACK_TRACE_TSK, 1,
1428                 [save_stack_trace_tsk is exported])])
1429 ]) # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1430
1431 #
1432 # LIBCFS_LOCKDEP_IS_HELD
1433 #
1434 # Kernel v4.15-rc8-106-g08f36ff64234
1435 # lockdep: Make lockdep checking constant
1436 #
1437 AC_DEFUN([LIBCFS_SRC_LOCKDEP_IS_HELD], [
1438         LB2_LINUX_TEST_SRC([lockdep_is_held], [
1439                 #include <linux/lockdep.h>
1440         ],[
1441         #ifdef CONFIG_LOCKDEP
1442                 const struct spinlock *lock = NULL;
1443
1444                 lockdep_is_held(lock);
1445         #endif
1446         ],[-Werror])
1447 ])
1448 AC_DEFUN([LIBCFS_LOCKDEP_IS_HELD], [
1449         LB2_MSG_LINUX_TEST_RESULT([if 'lockdep_is_held()' uses const argument],
1450         [lockdep_is_held], [
1451         ],[
1452                 AC_DEFINE(NEED_LOCKDEP_IS_HELD_DISCARD_CONST, 1,
1453                         [lockdep_is_held() argument is const])
1454         ])
1455 ]) # LIBCFS_LOCKDEP_IS_HELD
1456
1457 #
1458 # LIBCFS_BITMAP_TO_ARR32
1459 #
1460 # Kernel commit v4.15-10794-gc724f19 introduced
1461 # bitmap_{from,to}_arr32, which are handy functions, to move
1462 # data back and forth between a bitmap and a u32 array
1463 #
1464 AC_DEFUN([LIBCFS_SRC_BITMAP_TO_ARR32], [
1465         LB2_LINUX_TEST_SRC([bitmap_to_arr32], [
1466                 #include <linux/bitmap.h>
1467         ],[
1468                 bitmap_to_arr32(NULL, NULL, 0);
1469         ],[-Werror])
1470 ])
1471 AC_DEFUN([LIBCFS_BITMAP_TO_ARR32], [
1472         LB2_MSG_LINUX_TEST_RESULT([if 'bitmap_to_arr32()' exist],
1473         [bitmap_to_arr32], [
1474                 AC_DEFINE(HAVE_BITMAP_TO_ARR32, 1,
1475                         [bitmap_to_arr32() exist])
1476         ])
1477 ]) # LIBCFS_BITMAP_TO_ARR32
1478
1479 #
1480 # LIBCFS_TIMER_SETUP
1481 #
1482 # Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
1483 # setup_timer() was replaced by timer_setup(), where the callback
1484 # argument is the structure already holding the struct timer_list.
1485 #
1486 AC_DEFUN([LIBCFS_SRC_TIMER_SETUP], [
1487         LB2_LINUX_TEST_SRC([timer_setup], [
1488                 #include <linux/timer.h>
1489         ],[
1490                 timer_setup(NULL, NULL, 0);
1491         ])
1492 ])
1493 AC_DEFUN([LIBCFS_TIMER_SETUP], [
1494         LB2_MSG_LINUX_TEST_RESULT([if setup_timer has been replaced with timer_setup],
1495         [timer_setup], [
1496                 AC_DEFINE(HAVE_TIMER_SETUP, 1,
1497                         [timer_setup has replaced setup_timer])
1498         ])
1499 ]) # LIBCFS_TIMER_SETUP
1500
1501 #
1502 # LIBCFS_WAIT_VAR_EVENT
1503 #
1504 # Kernel version 4.16-rc4 commit 6b2bb7265f0b62605e8caee3613449ed0db270b9
1505 # added wait_var_event()
1506 #
1507 AC_DEFUN([LIBCFS_SRC_WAIT_VAR_EVENT], [
1508         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1509                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1510         else
1511                 WAIT_BIT_H=""
1512         fi
1513         LB2_LINUX_TEST_SRC([wait_var_event], [
1514                 #ifdef HAVE_WAIT_BIT_HEADER_H
1515                 #include <linux/wait_bit.h>
1516                 #endif
1517                 #include <linux/wait.h>
1518         ],[
1519                 wake_up_var(NULL);
1520         ],[${WAIT_BIT_H}])
1521 ])
1522 AC_DEFUN([LIBCFS_WAIT_VAR_EVENT], [
1523         LB2_MSG_LINUX_TEST_RESULT([if 'wait_var_event' exist],
1524         [wait_var_event], [
1525                 AC_DEFINE(HAVE_WAIT_VAR_EVENT, 1,
1526                         ['wait_var_event' is available])
1527         ])
1528 ]) # LIBCFS_WAIT_VAR_EVENT
1529
1530 #
1531 # LIBCFS_BITMAP_ALLOC
1532 #
1533 # Kernel version 4.17 commit c42b65e363ce97a828f81b59033c3558f8fa7f70
1534 # added bitmap memory allocation handling.
1535 #
1536 AC_DEFUN([LIBCFS_SRC_BITMAP_ALLOC], [
1537         LB2_LINUX_TEST_SRC([bitmap_alloc], [
1538                 #include <linux/bitmap.h>
1539         ],[
1540                 unsigned long *map = bitmap_alloc(1, GFP_KERNEL);
1541                 (void)map;
1542         ])
1543 ])
1544 AC_DEFUN([LIBCFS_BITMAP_ALLOC], [
1545         LB2_MSG_LINUX_TEST_RESULT([if Linux bitmap memory management exist],
1546         [bitmap_alloc], [
1547                 AC_DEFINE(HAVE_BITMAP_ALLOC, 1,
1548                         [Linux bitmap can be allocated])
1549         ])
1550 ]) # LIBCFS_BITMAP_ALLOC
1551
1552 #
1553 # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1554 #
1555 # Kernel version 4.17-rc2 commit 8236b0ae31c837d2b3a2565c5f8d77f637e824cc
1556 # added clear_and_wake_up_bit()
1557 #
1558 AC_DEFUN([LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT], [
1559         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1560                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1561         else
1562                 WAIT_BIT_H=""
1563         fi
1564         LB2_LINUX_TEST_SRC([clear_and_wake_up_bit], [
1565                 #ifdef HAVE_WAIT_BIT_HEADER_H
1566                 #include <linux/wait_bit.h>
1567                 #endif
1568                 #include <linux/wait.h>
1569         ],[
1570                 clear_and_wake_up_bit(0, NULL);
1571         ],[${WAIT_BIT_H}])
1572 ])
1573 AC_DEFUN([LIBCFS_CLEAR_AND_WAKE_UP_BIT], [
1574         LB2_MSG_LINUX_TEST_RESULT([if 'clear_and_wake_up_bit' exist],
1575         [clear_and_wake_up_bit], [
1576                 AC_DEFINE(HAVE_CLEAR_AND_WAKE_UP_BIT, 1,
1577                         ['clear_and_wake_up_bit' is available])
1578         ])
1579 ]) # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1580
1581 #
1582 # LIBCFS_TCP_SOCK_SET_NODELAY
1583 #
1584 # kernel 4.18.0-293.el8
1585 # tcp_sock_set_nodelay() was added
1586 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_NODELAY], [
1587         LB2_LINUX_TEST_SRC([tcp_sock_set_nodelay_exists], [
1588                 #include <linux/tcp.h>
1589         ],[
1590                 tcp_sock_set_nodelay(NULL);
1591         ],[-Werror])
1592 ])
1593 AC_DEFUN([LIBCFS_TCP_SOCK_SET_NODELAY], [
1594         LB2_MSG_LINUX_TEST_RESULT([if 'tcp_sock_set_nodelay()' exists],
1595         [tcp_sock_set_nodelay_exists], [
1596                 AC_DEFINE(HAVE_TCP_SOCK_SET_NODELAY, 1,
1597                         ['tcp_sock_set_nodelay()' exists])
1598         ])
1599 ]) # LIBCFS_TCP_SOCK_SET_NODELAY
1600
1601 #
1602 # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1603 #
1604 # kernel 4.18.0-293.el8
1605 # tcp_sock_set_keepidle() was added
1606 #
1607 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE], [
1608         LB2_LINUX_TEST_SRC([tcp_sock_set_keepidle_exists], [
1609                 #include <linux/tcp.h>
1610         ],[
1611                 tcp_sock_set_keepidle(NULL, 0);
1612         ],[-Werror])
1613 ])
1614 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPIDLE], [
1615         LB2_MSG_LINUX_TEST_RESULT([if 'tcp_sock_set_keepidle()' exists],
1616         [tcp_sock_set_keepidle_exists], [
1617                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPIDLE, 1,
1618                         ['tcp_sock_set_keepidle()' exists])
1619         ])
1620 ]) # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1621
1622 #
1623 # LIBCFS_TCP_SOCK_SET_QUICKACK
1624 # kernel v5.7-rc6-2504-gddd061b8daed
1625 #   tcp: add tcp_sock_set_quickack
1626 #
1627 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_QUICKACK], [
1628         LB2_LINUX_TEST_SRC([tcp_sock_set_quickack_exists], [
1629                 #include <linux/tcp.h>
1630         ],[
1631                 tcp_sock_set_quickack(NULL, 0);
1632         ],[-Werror])
1633 ])
1634 AC_DEFUN([LIBCFS_TCP_SOCK_SET_QUICKACK], [
1635         LB2_MSG_LINUX_TEST_RESULT([if 'tcp_sock_set_quickack()' exists],
1636         [tcp_sock_set_quickack_exists], [
1637                 AC_DEFINE(HAVE_TCP_SOCK_SET_QUICKACK, 1,
1638                         ['tcp_sock_set_quickack()' exists])
1639         ])
1640 ]) # LIBCFS_TCP_SOCK_SET_QUICKACK
1641
1642 #
1643 # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1644 # v5.7-rc6-2508-gd41ecaac903c
1645 # tcp: add tcp_sock_set_keepintvl
1646 #
1647 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL], [
1648         LB2_LINUX_TEST_SRC([tcp_sock_set_keepintvl_exists], [
1649                 #include <linux/tcp.h>
1650         ],[
1651                 tcp_sock_set_keepintvl(NULL, 0);
1652         ],[-Werror])
1653 ])
1654 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPINTVL], [
1655         LB2_MSG_LINUX_TEST_RESULT([if 'tcp_sock_set_keepintvl()' exists],
1656         [tcp_sock_set_keepintvl_exists], [
1657                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPINTVL, 1,
1658                         ['tcp_sock_set_keepintvl()' exists])
1659         ])
1660 ]) # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1661
1662 #
1663 # LIBCFS_TCP_SOCK_SET_KEEPCNT
1664 # v5.7-rc6-2509-g480aeb9639d6
1665 # tcp: add tcp_sock_set_keepcnt
1666 #
1667 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT], [
1668         LB2_LINUX_TEST_SRC([tcp_sock_set_keepcnt_exists], [
1669                 #include <linux/tcp.h>
1670         ],[
1671                 tcp_sock_set_keepcnt(NULL, 0);
1672         ],[-Werror])
1673 ])
1674 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPCNT], [
1675         LB2_MSG_LINUX_TEST_RESULT([if 'tcp_sock_set_keepcnt()' exists],
1676         [tcp_sock_set_keepcnt_exists], [
1677                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPCNT, 1,
1678                         ['tcp_sock_set_keepcnt()' exists])
1679         ])
1680 ]) # LIBCFS_TCP_SOCK_SET_KEEPCNT
1681
1682 #
1683 # LIBCFS_XARRAY_SUPPORT
1684 #
1685 # 4.19-rc5 kernel commit 3159f943aafdbacb2f94c38fdaadabf2bbde2a14
1686 # replaced the radix tree implementation with Xarrays. This change
1687 # introduced functionaly needed for general Xarray support
1688 #
1689 AC_DEFUN([LIBCFS_SRC_XARRAY_SUPPORT], [
1690         LB2_LINUX_TEST_SRC([xarray_support], [
1691                 #include <linux/xarray.h>
1692         ],[
1693                 xa_is_value(NULL);
1694         ],[-Werror])
1695 ])
1696 AC_DEFUN([LIBCFS_XARRAY_SUPPORT], [
1697         LB2_MSG_LINUX_TEST_RESULT([if page cache uses Xarray],
1698         [xarray_support], [
1699                 AC_DEFINE(HAVE_XARRAY_SUPPORT, 1,
1700                         [kernel Xarray implementation lacks 'xa_is_value'])
1701         ])
1702 ]) # LIBCFS_XARRAY_SUPPORT
1703
1704 #
1705 # LIBCFS_NL_DUMP_EXT_ACK
1706 #
1707 # Kernel version 4.19-rc6 commit 4a19edb60d0203cd5bf95a8b46ea8f63fd41194c
1708 # added extended ACK handling to Netlink dump handlers
1709 #
1710 AC_DEFUN([LIBCFS_SRC_NL_DUMP_EXT_ACK], [
1711         LB2_LINUX_TEST_SRC([netlink_dump_ext_ack], [
1712                 #include <net/netlink.h>
1713         ],[
1714                 struct netlink_callback *cb = NULL;
1715                 cb->extack = NULL;
1716         ],[])
1717 ])
1718 AC_DEFUN([LIBCFS_NL_DUMP_EXT_ACK], [
1719         LB2_MSG_LINUX_TEST_RESULT([if Netlink dump handlers support ext_ack],
1720         [netlink_dump_ext_ack], [
1721                 AC_DEFINE(HAVE_NL_DUMP_WITH_EXT_ACK, 1,
1722                         [netlink_ext_ack is handled for Netlink dump handlers])
1723         ])
1724 ]) # LIBCFS_NL_DUMP_EXT_ACK
1725
1726 #
1727 # LIBCFS_HAVE_IOV_ITER_TYPE
1728 #
1729 # kernel 4.20 commit 00e23707442a75b404392cef1405ab4fd498de6b
1730 # iov_iter: Use accessor functions to access an iterator's type and direction.
1731 #
1732 AC_DEFUN([LIBCFS_SRC_HAVE_IOV_ITER_TYPE], [
1733         LB2_LINUX_TEST_SRC([macro_iov_iter_type_exists], [
1734                 #include <linux/uio.h>
1735         ],[
1736                 struct iov_iter iter = { };
1737                 enum iter_type type = iov_iter_type(&iter);
1738                 (void)type;
1739         ],[-Werror])
1740 ])
1741 AC_DEFUN([LIBCFS_HAVE_IOV_ITER_TYPE], [
1742         LB2_MSG_LINUX_TEST_RESULT([if iov_iter_type exists],
1743         [macro_iov_iter_type_exists], [
1744                 AC_DEFINE(HAVE_IOV_ITER_TYPE, 1,
1745                         [if iov_iter_type exists])
1746         ])
1747 ]) # LIBCFS_HAVE_IOV_ITER_TYPE
1748
1749 #
1750 # LIBCFS_GENRADIX
1751 #
1752 # Kernel 5.0 commit ba20ba2e3743bac786dff777954c11930256075e
1753 # implemented generic radix trees to handle very large memory
1754 # allocation that can be used instead of vmalloc which has
1755 # a performance penalty.
1756 #
1757 AC_DEFUN([LIBCFS_GENRADIX], [
1758 LB_CHECK_EXPORT([__genradix_ptr], [lib/generic-radix-tree.c],
1759         [AC_DEFINE(HAVE_GENRADIX_SUPPORT, 1,
1760                 [generic-radix-tree is present])])
1761 ]) # LIBCFS_GENRADIX
1762
1763 #
1764 # LIBCFS_GET_REQUEST_KEY_AUTH
1765 #
1766 # kernel 5.0 commit 822ad64d7e46a8e2c8b8a796738d7b657cbb146d
1767 # keys: Fix dependency loop between construction record and auth key
1768 #
1769 # Added <keys/request_key_auth-type.h> and get_request_key_auth()
1770 # which was propagated to stable
1771 #
1772 AC_DEFUN([LIBCFS_SRC_GET_REQUEST_KEY_AUTH], [
1773         LB2_LINUX_TEST_SRC([get_request_key_auth_exported], [
1774                 #include <linux/key.h>
1775                 #include <linux/keyctl.h>
1776                 #include <keys/request_key_auth-type.h>
1777         ],[
1778                 struct key *ring;
1779                 const struct key *key = NULL;
1780                 struct request_key_auth *rka = get_request_key_auth(key);
1781
1782                 ring = key_get(rka->dest_keyring);
1783         ],[-Werror])
1784 ])
1785 AC_DEFUN([LIBCFS_GET_REQUEST_KEY_AUTH], [
1786         LB2_MSG_LINUX_TEST_RESULT([if get_request_key_auth() is available],
1787         [get_request_key_auth_exported], [
1788                 AC_DEFINE(HAVE_GET_REQUEST_KEY_AUTH, 1,
1789                         [get_request_key_auth() is available])
1790         ])
1791 ]) # LIBCFS_GET_REQUEST_KEY_AUTH
1792
1793 #
1794 # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1795 #
1796 # Linux commit v5.1-rc3-29-gaa30f47cf666
1797 #    kobject: Add support for default attribute groups to kobj_type
1798 # Linux commit v5.18-rc1-2-gcdb4f26a63c3
1799 #    kobject: kobj_type: remove default_attrs
1800 #
1801 AC_DEFUN([LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS],[
1802         LB2_LINUX_TEST_SRC([kobj_type_default_groups], [
1803                 #include <linux/kobject.h>
1804         ],[
1805                 struct kobj_type *kobj_type = NULL;
1806                 void *has = kobj_type->default_groups;
1807                 (void) has;
1808         ])
1809 ])
1810 AC_DEFUN([LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS],[
1811         LB2_MSG_LINUX_TEST_RESULT([does struct kobj_type have 'default_groups' member],
1812         [kobj_type_default_groups], [
1813                 AC_DEFINE(HAVE_KOBJ_TYPE_DEFAULT_GROUPS, 1,
1814                         [struct kobj_type has 'default_groups' member])
1815         ])
1816 ]) # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1817
1818 #
1819 # LIBCFS_LOOKUP_USER_KEY
1820 #
1821 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1822 # signal: Remove task parameter from force_sig
1823 #
1824 AC_DEFUN([LIBCFS_SRC_LOOKUP_USER_KEY], [
1825         LB2_LINUX_TEST_SRC([lookup_user_key_exported], [
1826                 #include <linux/key.h>
1827                 #include <linux/keyctl.h>
1828         ],[
1829                 lookup_user_key(KEY_SPEC_USER_KEYRING, 0, 0);
1830         ],[-Werror])
1831 ])
1832 AC_DEFUN([LIBCFS_LOOKUP_USER_KEY], [
1833         LB2_MSG_LINUX_TEST_RESULT([if lookup_user_key() is available],
1834         [lookup_user_key_exported], [
1835                 AC_DEFINE(HAVE_LOOKUP_USER_KEY, 1,
1836                         [lookup_user_key() is available])
1837         ])
1838 ]) # LIBCFS_LOOKUP_USER_KEY
1839
1840 #
1841 # LIBCFS_CACHE_DETAIL_WRITERS
1842 #
1843 # kernel v5.3-rc2-1-g64a38e840ce5
1844 # SUNRPC: Track writers of the 'channel' file to improve cache_listeners_exist
1845 #
1846 AC_DEFUN([LIBCFS_SRC_CACHE_DETAIL_WRITERS], [
1847         LB2_LINUX_TEST_SRC([cache_detail_writers_atomic], [
1848                 #include <linux/sunrpc/cache.h>
1849
1850                 static struct cache_detail rsi_cache;
1851         ],[
1852                 atomic_set(&rsi_cache.writers, 0);
1853         ],[-Werror])
1854 ])
1855 AC_DEFUN([LIBCFS_CACHE_DETAIL_WRITERS], [
1856         LB2_MSG_LINUX_TEST_RESULT([if struct cache_detail has writers],
1857         [cache_detail_writers_atomic], [
1858                 AC_DEFINE(HAVE_CACHE_DETAIL_WRITERS, 1,
1859                         [struct cache_detail has writers])
1860         ])
1861 ]) # LIBCFS_CACHE_DETAIL_WRITERS
1862
1863 #
1864 # LIBCFS_GENL_DUMPIT_INFO
1865 #
1866 # kernel v5.4-rc1 commit bf813b0afeae2f012f0e527a526c1b78ca21ad82
1867 # expanded struct genl_dumpit_info to include struct genl_family.
1868 #
1869 AC_DEFUN([LIBCFS_SRC_GENL_DUMPIT_INFO], [
1870         LB2_LINUX_TEST_SRC([genl_dumpit_info], [
1871                 #include <net/genetlink.h>
1872         ],[
1873                 static struct genl_dumpit_info info;
1874
1875                 info.family = NULL;
1876         ],[-Werror])
1877 ])
1878 AC_DEFUN([LIBCFS_GENL_DUMPIT_INFO], [
1879         LB2_MSG_LINUX_TEST_RESULT([if struct genl_dumpit_info has family field],
1880         [genl_dumpit_info], [
1881                 AC_DEFINE(HAVE_GENL_DUMPIT_INFO, 1,
1882                         [struct genl_dumpit_info has family field])
1883         ])
1884 ]) # LIBCFS_GENL_DUMPIT_INFO
1885
1886 #
1887 # LIBCFS_KALLSYMS_LOOKUP
1888 #
1889 # kernel v5.6-11591-g0bd476e6c671
1890 # kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()
1891 AC_DEFUN([LIBCFS_KALLSYMS_LOOKUP], [
1892 LB_CHECK_EXPORT([kallsyms_lookup_name], [kernel/kallsyms.c],
1893         [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1894                 [kallsyms_lookup_name is exported by kernel])])
1895 ]) # LIBCFS_KALLSYMS_LOOKUP
1896
1897 #
1898 # v5.5-8862-gd56c0d45f0e2
1899 # proc: decouple proc from VFS with "struct proc_ops"
1900 #
1901 AC_DEFUN([LIBCFS_SRC_HAVE_PROC_OPS], [
1902         LB2_LINUX_TEST_SRC([proc_ops], [
1903                 #include <linux/proc_fs.h>
1904
1905                 static struct proc_ops *my_proc;
1906         ],[
1907                 my_proc->proc_lseek = NULL;
1908         ],[-Werror])
1909 ]) # LIBCFS_SRC_HAVE_PROC_OPS
1910 AC_DEFUN([LIBCFS_HAVE_PROC_OPS], [
1911         LB2_MSG_LINUX_TEST_RESULT([if struct proc_ops exists],
1912         [proc_ops], [
1913                 AC_DEFINE(HAVE_PROC_OPS, 1,
1914                         [struct proc_ops exists])
1915         ])
1916 ]) # LIBCFS_HAVE_PROC_OPS
1917
1918 #
1919 # LIBCFS_IP6_SET_PREF
1920 #
1921 # kernel v5.8-rc1~165^2~71^2~3 commit 18d5ad62327576cbb1e5b9938a59d63ac0c15832
1922 # ipv6: add ip6_sock_set_addr_preferences
1923 #
1924 AC_DEFUN([LIBCFS_SRC_IP6_SET_PREF], [
1925         LB2_LINUX_TEST_SRC([ip6_set_pref_test], [
1926                 #include <net/ipv6.h>
1927         ],[
1928                 ip6_sock_set_addr_preferences(NULL, 0);
1929         ],[-Werror])
1930 ])
1931 AC_DEFUN([LIBCFS_IP6_SET_PREF], [
1932         LB2_MSG_LINUX_TEST_RESULT([if ip6_sock_set_addr_preferences() exists],
1933         [ip6_set_pref_test], [
1934                 AC_DEFINE(HAVE_IP6_SET_PREF, 1,
1935                         [if ip6_sock_set_addr_preferences exists])
1936         ])
1937 ]) # LIBCFS_IP6_SET_PREF
1938
1939 #
1940 # LIBCFS_IP_SET_TOS
1941 #
1942 # kernel v5.8-rc1~165^2~71^2~3 commit 6ebf71bab9fb476fc8132be4c12b88201278f0ca
1943 # ipv4: add ip_sock_set_tos
1944 #
1945 AC_DEFUN([LIBCFS_SRC_IP_SET_TOS], [
1946         LB2_LINUX_TEST_SRC([ip_set_tos_test], [
1947                 #include <net/ip.h>
1948         ],[
1949                 ip_sock_set_tos(NULL, 0);
1950         ],[-Werror])
1951 ])
1952 AC_DEFUN([LIBCFS_IP_SET_TOS], [
1953         LB2_MSG_LINUX_TEST_RESULT([if ip_sock_set_tos() exists],
1954         [ip_set_tos_test], [
1955                 AC_DEFINE(HAVE_IP_SET_TOS, 1,
1956                         [if ip_sock_set_tos exists])
1957         ])
1958 ]) # LIBCFS_IP_SET_TOS
1959
1960 #
1961 # LIBCFS_VMALLOC_2ARGS
1962 #
1963 # kernel v5.8-rc1~201^2~19
1964 # mm: remove the pgprot argument to __vmalloc
1965 AC_DEFUN([LIBCFS_SRC_VMALLOC_2ARGS], [
1966         LB2_LINUX_TEST_SRC([vmalloc_2args], [
1967                 #include <linux/vmalloc.h>
1968         ],[
1969                 __vmalloc(0, 0);
1970         ],[])
1971 ])
1972 AC_DEFUN([LIBCFS_VMALLOC_2ARGS], [
1973         LB2_MSG_LINUX_TEST_RESULT([if __vmalloc has 2 args],
1974         [vmalloc_2args], [
1975                 AC_DEFINE(HAVE_VMALLOC_2ARGS, 1,
1976                         [__vmalloc only takes 2 args.])
1977         ])
1978 ]) # LIBCFS_VMALLOC_2ARGS
1979
1980 #
1981 # LIBCFS_HAVE_NR_UNSTABLE_NFS
1982 #
1983 # kernel v5.8-rc1~201^2~75
1984 # mm/writeback: discard NR_UNSTABLE_NFS, use NR_WRITEBACK instead
1985 #
1986 AC_DEFUN([LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS], [
1987         LB2_LINUX_TEST_SRC([nr_unstable_nfs_exists], [
1988                 #include <linux/mm.h>
1989
1990                 int i;
1991         ],[
1992                 i = NR_UNSTABLE_NFS;
1993         ],[-Werror])
1994 ])
1995 AC_DEFUN([LIBCFS_HAVE_NR_UNSTABLE_NFS], [
1996         LB2_MSG_LINUX_TEST_RESULT([if NR_UNSTABLE_NFS still in use],
1997         [nr_unstable_nfs_exists], [
1998                 AC_DEFINE(HAVE_NR_UNSTABLE_NFS, 1,
1999                         [NR_UNSTABLE_NFS is still in use.])
2000         ])
2001 ]) # LIBCFS_HAVE_NR_UNSTABLE_NFS
2002
2003 #
2004 # LIBCFS_HAVE_MMAP_LOCK
2005 #
2006 # kernel v5.8-rc1~83^2~24
2007 # mmap locking API: rename mmap_sem to mmap_lock
2008 #
2009 AC_DEFUN([LIBCFS_SRC_HAVE_MMAP_LOCK], [
2010         LB2_LINUX_TEST_SRC([mmap_write_lock], [
2011                 #include <linux/mm.h>
2012         ],[
2013                 mmap_write_lock(NULL);
2014         ],[])
2015 ])
2016 AC_DEFUN([LIBCFS_HAVE_MMAP_LOCK], [
2017         LB2_MSG_LINUX_TEST_RESULT([if mmap_lock API is available],
2018         [mmap_write_lock], [
2019                 AC_DEFINE(HAVE_MMAP_LOCK, 1,
2020                         [mmap_lock API is available.])
2021         ])
2022 ]) # LIBCFS_HAVE_MMAP_LOCK
2023
2024 #
2025 # LIBCFS_KERNEL_SETSOCKOPT
2026 #
2027 # kernel v5.8-rc1~165^2~59^2
2028 # net: remove kernel_setsockopt
2029 AC_DEFUN([LIBCFS_SRC_KERNEL_SETSOCKOPT], [
2030         LB2_LINUX_TEST_SRC([kernel_setsockopt_exists], [
2031                 #include <linux/net.h>
2032         ],[
2033                 kernel_setsockopt(NULL, 0, 0, NULL, 0);
2034         ],[-Werror])
2035 ])
2036 AC_DEFUN([LIBCFS_KERNEL_SETSOCKOPT], [
2037         LB2_MSG_LINUX_TEST_RESULT([if kernel_setsockopt still in use],
2038         [kernel_setsockopt_exists], [
2039         AC_DEFINE(HAVE_KERNEL_SETSOCKOPT, 1,
2040                 [kernel_setsockopt still in use])
2041         ])
2042 ]) # LIBCFS_KERNEL_SETSOCKOPT
2043
2044 #
2045 # LIBCFS_USER_UID_KEYRING
2046 #
2047 # kernel 5.2 commit 0f44e4d976f9 removed uid_keyring
2048 # from the user_struct struct
2049 #
2050 AC_DEFUN([LIBCFS_SRC_USER_UID_KEYRING], [
2051         LB2_LINUX_TEST_SRC([user_uid_keyring_exists], [
2052                 #include <linux/sched/user.h>
2053         ],[
2054                 ((struct user_struct *)0)->uid_keyring = NULL;
2055         ],[-Werror])
2056 ])
2057 AC_DEFUN([LIBCFS_USER_UID_KEYRING], [
2058         AC_MSG_CHECKING([if uid_keyring exists])
2059         LB2_LINUX_TEST_RESULT([user_uid_keyring_exists], [
2060                 AC_DEFINE(HAVE_USER_UID_KEYRING, 1,
2061                         [uid_keyring exists])
2062         ])
2063 ]) # LIBCFS_USER_UID_KEYRING
2064
2065 #
2066 # LIBCFS_KEY_NEED_UNLINK
2067 #
2068 # kernel 5.8 commit 8c0637e950d68933a67f7438f779d79b049b5e5c
2069 # keys: Make the KEY_NEED_* perms an enum rather than a mask
2070 #
2071 AC_DEFUN([LIBCFS_SRC_KEY_NEED_UNLINK], [
2072         LB2_LINUX_TEST_SRC([key_need_unlink_exists], [
2073                 #include <linux/key.h>
2074                 #include <linux/keyctl.h>
2075         ],[
2076                 lookup_user_key(0, 0, KEY_NEED_UNLINK);
2077         ],[-Werror])
2078 ])
2079 AC_DEFUN([LIBCFS_KEY_NEED_UNLINK], [
2080         LB2_MSG_LINUX_TEST_RESULT([if KEY_NEED_UNLINK exists],
2081         [key_need_unlink_exists], [
2082                 AC_DEFINE(HAVE_KEY_NEED_UNLINK, 1,
2083                         [KEY_NEED_UNLINK exists])
2084         ])
2085 ]) # LIBCFS_KEY_NEED_UNLINK
2086
2087 #
2088 # LIBCFS_SEC_RELEASE_SECCTX
2089 #
2090 # kernel linux-hwe-5.8 (5.8.0-22.23~20.04.1)
2091 # LSM: Use lsmcontext in security_release_secctx
2092 AC_DEFUN([LIBCFS_SRC_SEC_RELEASE_SECCTX], [
2093         LB2_LINUX_TEST_SRC([security_release_secctx_1arg], [
2094                 #include <linux/security.h>
2095         ],[
2096                 security_release_secctx(NULL);
2097         ],[])
2098 ])
2099 AC_DEFUN([LIBCFS_SEC_RELEASE_SECCTX], [
2100         LB2_MSG_LINUX_TEST_RESULT([if security_release_secctx has 1 arg],
2101         [security_release_secctx_1arg], [
2102                 AC_DEFINE(HAVE_SEC_RELEASE_SECCTX_1ARG, 1,
2103                         [security_release_secctx has 1 arg.])
2104         ])
2105 ]) # LIBCFS_SEC_RELEASE_SECCTX
2106
2107 #
2108 # LIBCFS_HAVE_KFREE_SENSITIVE
2109 #
2110 # kernel v5.10-rc1~3
2111 # mm: remove kzfree() compatibility definition
2112 #
2113 AC_DEFUN([LIBCFS_SRC_HAVE_KFREE_SENSITIVE], [
2114         LB2_LINUX_TEST_SRC([kfree_sensitive_exists], [
2115                 #include <linux/slab.h>
2116         ],[
2117                 kfree_sensitive(NULL);
2118         ], [-Werror])
2119 ])
2120 AC_DEFUN([LIBCFS_HAVE_KFREE_SENSITIVE], [
2121         LB2_MSG_LINUX_TEST_RESULT([if kfree_sensitive() is available],
2122         [kfree_sensitive_exists], [
2123                 AC_DEFINE(HAVE_KFREE_SENSITIVE, 1,
2124                         [kfree_sensitive() is available.])
2125         ])
2126 ]) # LIBCFS_HAVE_KFREE_SENSITIVE
2127
2128 #
2129 # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2130 #
2131 # Kernel v5.10-rc1-114-ga24d22b225ce
2132 # crypto: sha - split sha.h into sha1.h and sha2.h
2133 #
2134 AC_DEFUN([LIBCFS_SRC_HAVE_CRYPTO_SHA2_HEADER], [
2135         LB2_CHECK_LINUX_HEADER_SRC([crypto/sha2.h], [-Werror])
2136 ])
2137 AC_DEFUN([LIBCFS_HAVE_CRYPTO_SHA2_HEADER], [
2138         LB2_CHECK_LINUX_HEADER_RESULT([crypto/sha2.h], [
2139                 AC_DEFINE(HAVE_CRYPTO_SHA2_HEADER, 1,
2140                         [crypto/sha2.h is present])
2141         ])
2142 ]) # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2143
2144 #
2145 # LIBCFS_HAVE_LIST_CMP_FUNC_T
2146 #
2147 # kernel 5.10.70 commit 4f0f586bf0c898233d8f316f471a21db2abd522d
2148 # treewide: Change list_sort to use const pointers
2149 AC_DEFUN([LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T], [
2150         LB2_LINUX_TEST_SRC([list_cmp_func_t_exists], [
2151                 #include <linux/list_sort.h>
2152         ],[
2153                 list_cmp_func_t cmp;
2154                 (void)cmp;
2155         ], [-Werror])
2156 ])
2157 AC_DEFUN([LIBCFS_HAVE_LIST_CMP_FUNC_T], [
2158         LB2_MSG_LINUX_TEST_RESULT([if list_cmp_func_t type is defined],
2159         [list_cmp_func_t_exists], [
2160                 AC_DEFINE(HAVE_LIST_CMP_FUNC_T, 1,
2161                         [list_cmp_func_t type is defined])
2162         ])
2163 ]) # LIBCFS_HAVE_LIST_CMP_FUNC_T
2164
2165 #
2166 # LIBCFS_NLA_STRLCPY
2167 #
2168 # Kernel version 5.10-rc3 commit 872f690341948b502c93318f806d821c56772c42
2169 # replaced nla_strlcpy() with nla_strscpy().
2170 #
2171 AC_DEFUN([LIBCFS_SRC_NLA_STRLCPY], [
2172         LB2_LINUX_TEST_SRC([nla_strlcpy], [
2173                 #include <net/netlink.h>
2174         ],[
2175                 if (nla_strlcpy(NULL, NULL, 0) == 0)
2176                         return -EINVAL;
2177         ])
2178 ])
2179 AC_DEFUN([LIBCFS_NLA_STRLCPY], [
2180         LB2_MSG_LINUX_TEST_RESULT([if 'nla_strlcpy()' still exists],
2181         [nla_strlcpy], [
2182                 AC_DEFINE(HAVE_NLA_STRLCPY, 1,
2183                         ['nla_strlcpy' is available])
2184         ])
2185 ]) # LIBCFS_NLA_STRLCPY
2186
2187 #
2188 # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2189 #
2190 # Linux v5.11-11104-ga28a6e860c6c
2191 #  string.h: move fortified functions definitions in a dedicated header.
2192 #
2193 AC_DEFUN([LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER],[
2194         LB2_LINUX_TEST_SRC([linux_fortify_string_header], [
2195                 #include <linux/fortify-string.h>
2196         ],[
2197         ],[])
2198 ])
2199 AC_DEFUN([LIBCFS_LINUX_FORTIFY_STRING_HEADER],[
2200         LB2_MSG_LINUX_TEST_RESULT([Is linux/fortify-string.h header available],
2201         [linux_fortify_string_header], [
2202                 AC_DEFINE(HAVE_LINUX_FORTIFY_STRING_HEADER, 1,
2203                         [linux/fortify-string.h header available])
2204         ])
2205 ]) # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2206
2207 #
2208 # LIBCFS_HAVE_CIPHER_HEADER
2209 #
2210 # Kernel 5.12 commit 0eb76ba29d16df2951d37c54ca279c4e5630b071
2211 # crypto: remove cipher routines from public crypto API
2212 #
2213 AC_DEFUN([LIBCFS_SRC_HAVE_CIPHER_HEADER], [
2214         LB2_CHECK_LINUX_HEADER_SRC([crypto/internal/cipher.h], [-Werror])
2215 ])
2216 AC_DEFUN([LIBCFS_HAVE_CIPHER_HEADER], [
2217         LB2_CHECK_LINUX_HEADER_RESULT([crypto/internal/cipher.h], [
2218                 AC_DEFINE(HAVE_CIPHER_H, 1,
2219                         [crypto/internal/cipher.h is present])
2220         ])
2221 ]) # LIBCFS_HAVE_CIPHER_HEADER
2222
2223 #
2224 # LIBCFS_HAVE_TASK_RUNNING
2225 #
2226 # Kernel 5.13-rc6 commit b03fbd4ff24c5f075e58eb19261d5f8b3e40d
2227 # introduced task_is_running() macro.
2228 #
2229 AC_DEFUN([LIBCFS_SRC_HAVE_TASK_IS_RUNNING], [
2230         LB2_LINUX_TEST_SRC([task_is_running], [
2231                 #include <linux/sched.h>
2232         ],[
2233                 if (task_is_running(current))
2234                         schedule();
2235         ], [-Werror])
2236 ])
2237 AC_DEFUN([LIBCFS_HAVE_TASK_IS_RUNNING], [
2238         LB2_MSG_LINUX_TEST_RESULT([if task_is_running() is defined],
2239         [task_is_running], [
2240                 AC_DEFINE(HAVE_TASK_IS_RUNNING, 1,
2241                         [task_is_running() is defined])
2242         ])
2243 ]) # LIBCFS_HAVE_TASK_IS_RUNNING
2244
2245 #
2246 # LIBCFS_LINUX_STDARG_HEADER
2247 #
2248 # Kernel 5.14-rc5 commit c0891ac15f0428ffa81b2e818d416bdf3cb74ab6
2249 # isystem: ship and use stdarg.h
2250 #
2251 AC_DEFUN([LIBCFS_SRC_LINUX_STDARG_HEADER], [
2252         LB2_CHECK_LINUX_HEADER_SRC([linux/stdarg.h], [-Werror])
2253 ])
2254 AC_DEFUN([LIBCFS_LINUX_STDARG_HEADER], [
2255         LB2_CHECK_LINUX_HEADER_RESULT([linux/stdarg.h], [
2256                 AC_DEFINE(HAVE_LINUX_STDARG_HEADER, 1,
2257                         [linux/stdarg.h is present])
2258         ])
2259 ]) # LIBCFS_LINUX_STDARG_HEADER
2260
2261 #
2262 # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2263 #
2264 # Kernel 5.14 commit f39650de687e35766572ac89dbcd16a5911e2f0a
2265 # kernel.h: split out panic and oops helpers
2266 #
2267 AC_DEFUN([LIBCFS_SRC_HAVE_PANIC_NOTIFIER_HEADER], [
2268         LB2_CHECK_LINUX_HEADER_SRC([linux/panic_notifier.h], [-Werror])
2269 ])
2270 AC_DEFUN([LIBCFS_HAVE_PANIC_NOTIFIER_HEADER], [
2271         LB2_CHECK_LINUX_HEADER_RESULT([linux/panic_notifier.h], [
2272                 AC_DEFINE(HAVE_PANIC_NOTIFIER_H, 1,
2273                         [linux/panic_notifier.h is present])
2274         ])
2275 ]) # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2276
2277 #
2278 # LIBCFS_PARAM_SET_UINT_MINMAX
2279 #
2280 # Kernel 5.15-rc1 commit 2a14c9ae15a38148484a128b84bff7e9ffd90d68
2281 # moved param_set_uint_minmax to common code
2282 #
2283 AC_DEFUN([LIBCFS_SRC_PARAM_SET_UINT_MINMAX],[
2284         LB2_LINUX_TEST_SRC([param_set_uint_minmax], [
2285                 #include <linux/moduleparam.h>
2286         ],[
2287                 param_set_uint_minmax(NULL, NULL, 0, 0);
2288         ], [])
2289 ])
2290 AC_DEFUN([LIBCFS_PARAM_SET_UINT_MINMAX],[
2291         LB2_MSG_LINUX_TEST_RESULT([does function 'param_set_uint_minmax' exist],
2292         [param_set_uint_minmax], [
2293                 AC_DEFINE(HAVE_PARAM_SET_UINT_MINMAX, 1,
2294                         ['param_set_uint_minmax' is available])
2295         ])
2296 ]) # LIBCFS_PARAM_SET_UINT_MINMAX
2297
2298 #
2299 # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2300 #
2301 # Kernel 5.15-rc6 commit fe45e630a1035aea94c29016f2598bbde149bbe3
2302 # block: move integrity handling out of <linux/blkdev.h>
2303 #
2304 AC_DEFUN([LIBCFS_SRC_LINUX_BLK_INTEGRITY_HEADER], [
2305         LB2_CHECK_LINUX_HEADER_SRC([linux/blk-integrity.h], [-Werror])
2306 ])
2307 AC_DEFUN([LIBCFS_LINUX_BLK_INTEGRITY_HEADER], [
2308         LB2_CHECK_LINUX_HEADER_RESULT([linux/blk-integrity.h], [
2309                 AC_DEFINE(HAVE_LINUX_BLK_INTEGRITY_HEADER, 1,
2310                         [linux/blk-integrity.h is present])
2311         ])
2312 ]) # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2313
2314 #
2315 # LIBCFS_PDE_DATA_EXISTS
2316 #
2317 # Linux commit v5.16-11573-g6dfbbae14a7b
2318 #    introduce pde_data()
2319 # Linux commit v5.16-11574-g359745d78351
2320 #    remove PDE_DATA()
2321 #
2322 AC_DEFUN([LIBCFS_SRC_PDE_DATA_EXISTS],[
2323         LB2_LINUX_TEST_SRC([pde_data], [
2324                 #include <linux/proc_fs.h>
2325         ],[
2326                 struct inode *inode = NULL;
2327                 void *data =pde_data(inode);
2328                 (void)data;
2329         ],[])
2330 ])
2331 AC_DEFUN([LIBCFS_PDE_DATA_EXISTS],[
2332         LB2_MSG_LINUX_TEST_RESULT([does function 'pde_data' exist],
2333         [pde_data], [
2334                 AC_DEFINE(HAVE_pde_data, 1, [function pde_data() available])
2335         ],[
2336                 AC_DEFINE(pde_data(inode), PDE_DATA(inode),
2337                           [function pde_data() unavailable])
2338         ])
2339 ]) # LIBCFS_PDE_DATA_EXISTS
2340
2341 #
2342 # LIBCFS_BIO_ALLOC_WITH_BDEV
2343 #
2344 # Linux commit v5.17-rc2-21-g07888c665b40
2345 #   block: pass a block_device and opf to bio_alloc
2346 #
2347 AC_DEFUN([LIBCFS_SRC_BIO_ALLOC_WITH_BDEV],[
2348         LB2_LINUX_TEST_SRC([bio_alloc_with_bdev], [
2349                 #include <linux/bio.h>
2350         ],[
2351                 struct block_device *bdev = NULL;
2352                 unsigned short nr_vecs = 1;
2353                 gfp_t gfp = GFP_KERNEL;
2354                 struct bio *bio = bio_alloc(bdev, nr_vecs, REQ_OP_WRITE, gfp);
2355                 (void) bio;
2356         ],[])
2357 ])
2358 AC_DEFUN([LIBCFS_BIO_ALLOC_WITH_BDEV],[
2359         LB2_MSG_LINUX_TEST_RESULT([does bio_alloc() takes a struct block_device],
2360         [bio_alloc_with_bdev], [
2361                 AC_DEFINE(HAVE_BIO_ALLOC_WITH_BDEV, 1,
2362                         [bio_alloc() takes a struct block_device])
2363         ])
2364 ]) # LIBCFS_BIO_ALLOC_WITH_BDEV
2365
2366 #
2367 # LIBCFS_TIMER_DELETE_SYNC
2368 #
2369 # Linux commit v6.1-rc1-7-g9a5a30568697
2370 #   timers: Get rid of del_singleshot_timer_sync()
2371 # Linux commit v6.1-rc1-11-g9b13df3fb64e
2372 #   timers: Rename del_timer_sync() to timer_delete_sync()
2373 #
2374 AC_DEFUN([LIBCFS_SRC_TIMER_DELETE_SYNC],[
2375         LB2_LINUX_TEST_SRC([timer_delete_sync], [
2376                 #include <linux/timer.h>
2377         ],[
2378                 struct timer_list *timer = NULL;
2379                 (void)timer_delete_sync(timer);
2380         ],[])
2381 ])
2382 AC_DEFUN([LIBCFS_TIMER_DELETE_SYNC],[
2383         LB2_MSG_LINUX_TEST_RESULT([is timer_delete_sync() available],
2384         [timer_delete_sync], [
2385                 AC_DEFINE(HAVE_TIMER_DELETE_SYNC, 1,
2386                         [timer_delete_sync() is available])
2387         ],[
2388                 AC_DEFINE(timer_delete_sync(t), del_timer_sync(t),
2389                         [timer_delete_sync() not is available])
2390         ])
2391 ]) # LIBCFS_TIMER_DELETE_SYNC
2392
2393 #
2394 # LIBCFS_TIMER_DELETE_SYNC
2395 #
2396 # Linux commit v6.1-rc1-12-gbb663f0f3c39
2397 #   timers: Rename del_timer() to timer_delete()
2398 #
2399 AC_DEFUN([LIBCFS_SRC_TIMER_DELETE],[
2400         LB2_LINUX_TEST_SRC([timer_delete], [
2401                 #include <linux/timer.h>
2402         ],[
2403                 struct timer_list *timer = NULL;
2404                 (void)timer_delete(timer);
2405         ],[])
2406 ])
2407 AC_DEFUN([LIBCFS_TIMER_DELETE],[
2408         LB2_MSG_LINUX_TEST_RESULT([is timer_delete() available],
2409         [timer_delete], [
2410                 AC_DEFINE(HAVE_TIMER_DELETE, 1,
2411                         [timer_delete() is available])
2412         ],[
2413                 AC_DEFINE(timer_delete(t), del_timer(t),
2414                         [timer_delete() not is available])
2415         ])
2416 ]) # LIBCFS_TIMER_DELETE
2417
2418 dnl #
2419 dnl # Generate and compile all of the kernel API test cases to determine
2420 dnl # which interfaces are available.  By invoking the kernel build system
2421 dnl # only once the compilation can be done in parallel significantly
2422 dnl # speeding up the process.
2423 dnl #
2424 AC_DEFUN([LIBCFS_PROG_LINUX_SRC], [
2425         # 3.11
2426         LIBCFS_SRC_KTIME_GET_TS64
2427         # 3.12
2428         LIBCFS_SRC_PREPARE_TO_WAIT_EVENT
2429         LIBCFS_SRC_KERNEL_PARAM_OPS
2430         LIBCFS_SRC_KTIME_ADD
2431         LIBCFS_SRC_KTIME_AFTER
2432         LIBCFS_SRC_KTIME_BEFORE
2433         LIBCFS_SRC_KTIME_COMPARE
2434         LIBCFS_SRC_SHRINKER_COUNT
2435         # 3.13
2436         LIBCFS_SRC_MATCH_WILDCARD
2437         # 3.14
2438         LIBCFS_SRC_HAVE_MAPPING_AS_EXITING_FLAG
2439         # 3.15
2440         LIBCFS_SRC_IOV_ITER_HAS_TYPE
2441         # 3.16
2442         LIBCFS_SRC_HAVE_GLOB
2443         # 3.17
2444         LIBCFS_SRC_HLIST_ADD_AFTER
2445         LIBCFS_SRC_TIMESPEC64
2446         LIBCFS_SRC_KTIME_GET_NS
2447         LIBCFS_SRC_KTIME_GET_REAL_TS64
2448         LIBCFS_SRC_KTIME_GET_REAL_SECONDS
2449         LIBCFS_SRC_KTIME_GET_REAL_NS
2450         LIBCFS_SRC_KTIME_TO_TIMESPEC64
2451         LIBCFS_SRC_TIMESPEC64_SUB
2452         LIBCFS_SRC_TIMESPEC64_TO_KTIME
2453         # 3.19
2454         LIBCFS_SRC_KTIME_GET_SECONDS
2455         LIBCFS_SRC_WAIT_WOKEN
2456         # 4.0
2457         LIBCFS_SRC_KTIME_MS_DELTA
2458         # 4.1
2459         LIBCFS_SRC_KERNEL_PARAM_LOCK
2460         # 4.2
2461         LIBCFS_SRC_STRSCPY_EXISTS
2462         LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK
2463         # 4.4
2464         LIBCFS_SRC_KSTRTOBOOL_FROM_USER
2465         LIBCFS_SRC_NETLINK_CALLBACK_START
2466         # 4.5
2467         LIBCFS_SRC_CRYPTO_HASH_HELPERS
2468         LIBCFS_SRC_RHASHTABLE_REPLACE
2469         # 4.6
2470         LIBCFS_SRC_BROKEN_HASH_64
2471         LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT
2472         LIBCFS_SRC_GET_USER_PAGES_6ARG
2473         LIBCFS_SRC_STRINGHASH
2474         # 4.7
2475         LIBCFS_SRC_RHASHTABLE_INSERT_FAST
2476         LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG
2477         # 4.8
2478         LIBCFS_SRC_HAVE_NR_ZONE_WRITE_PENDING
2479         LIBCFS_SRC_RHASHTABLE_LOOKUP
2480         LIBCFS_SRC_RHLTABLE
2481         LIBCFS_SRC_STACKTRACE_OPS
2482         # 4.9
2483         LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS
2484         LIBCFS_SRC_RHASHTABLE_WALK_ENTER
2485         # 4.10
2486         LIBCFS_SRC_HOTPLUG_STATE_MACHINE
2487         # 4.11
2488         LIBCFS_SRC_NL_EXT_ACK
2489         LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2490         LIBCFS_SRC_SCHED_HEADERS
2491         LIBCFS_SRC_KREF_READ
2492         LIBCFS_SRC_RHT_BUCKET_VAR
2493         # 4.12
2494         LIBCFS_SRC_CPUS_READ_LOCK
2495         LIBCFS_SRC_HAVE_PROCESSOR_HEADER
2496         LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME
2497         LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS
2498         LIBCFS_SRC_REFCOUNT_T
2499         LIBCFS_SRC_MEMALLOC_NORECLAIM
2500         # 4.13
2501         LIBCFS_SRC_NLA_STRDUP
2502         LIBCFS_SRC_WAIT_QUEUE_ENTRY
2503         # 4.14
2504         LIBCFS_SRC_DEFINE_TIMER
2505         LIBCFS_SRC_NEW_KERNEL_WRITE
2506         LIBCFS_SRC_NEW_KERNEL_READ
2507         # 4.15
2508         LIBCFS_SRC_BITMAP_TO_ARR32
2509         LIBCFS_SRC_TIMER_SETUP
2510         # 4.16
2511         LIBCFS_SRC_HAVE_NS_TO_TIMESPEC64
2512         LIBCFS_SRC_WAIT_VAR_EVENT
2513         # 4.17
2514         LIBCFS_SRC_BITMAP_ALLOC
2515         LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT
2516         # 4.18
2517         LIBCFS_SRC_TCP_SOCK_SET_NODELAY
2518         LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE
2519         # 4.19
2520         LIBCFS_SRC_XARRAY_SUPPORT
2521         LIBCFS_SRC_NL_DUMP_EXT_ACK
2522         # 4.20
2523         LIBCFS_SRC_HAVE_IOV_ITER_TYPE
2524         # 5.0
2525         LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC
2526         LIBCFS_SRC_GET_REQUEST_KEY_AUTH
2527         # 5.2
2528         LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS
2529         LIBCFS_SRC_USER_UID_KEYRING
2530         # 5.3
2531         LIBCFS_SRC_LOOKUP_USER_KEY
2532         LIBCFS_SRC_CACHE_DETAIL_WRITERS
2533         # 5.4
2534         LIBCFS_SRC_GENL_DUMPIT_INFO
2535         # 5.6
2536         LIBCFS_SRC_HAVE_PROC_OPS
2537         # 5.7
2538         LIBCFS_SRC_TCP_SOCK_SET_QUICKACK
2539         LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL
2540         LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT
2541         # 5.8
2542         LIBCFS_SRC_IP6_SET_PREF
2543         LIBCFS_SRC_IP_SET_TOS
2544         LIBCFS_SRC_VMALLOC_2ARGS
2545         LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS
2546         LIBCFS_SRC_KERNEL_SETSOCKOPT
2547         LIBCFS_SRC_KEY_NEED_UNLINK
2548         LIBCFS_SRC_SEC_RELEASE_SECCTX
2549         # 5.10
2550         LIBCFS_SRC_HAVE_KFREE_SENSITIVE
2551         LIBCFS_SRC_HAVE_CRYPTO_SHA2_HEADER
2552         LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T
2553         LIBCFS_SRC_NLA_STRLCPY
2554         # 5.12
2555         LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER
2556         LIBCFS_SRC_HAVE_CIPHER_HEADER
2557         # 5.13
2558         LIBCFS_SRC_HAVE_TASK_IS_RUNNING
2559         # 5.14
2560         LIBCFS_SRC_LINUX_STDARG_HEADER
2561         LIBCFS_SRC_HAVE_PANIC_NOTIFIER_HEADER
2562         # 5.15
2563         LIBCFS_SRC_PARAM_SET_UINT_MINMAX
2564         # 5.17
2565         LIBCFS_SRC_PDE_DATA_EXISTS
2566         LIBCFS_SRC_BIO_ALLOC_WITH_BDEV
2567         # 6.2
2568         LIBCFS_SRC_TIMER_DELETE_SYNC
2569         LIBCFS_SRC_TIMER_DELETE
2570 ])
2571
2572 dnl #
2573 dnl # Check results of kernel interface tests.
2574 dnl #
2575 AC_DEFUN([LIBCFS_PROG_LINUX_RESULTS], [
2576         # 3.11
2577         LIBCFS_KTIME_GET_TS64
2578         # 3.12
2579         LIBCFS_PREPARE_TO_WAIT_EVENT
2580         LIBCFS_KERNEL_PARAM_OPS
2581         LIBCFS_KTIME_ADD
2582         LIBCFS_KTIME_AFTER
2583         LIBCFS_KTIME_BEFORE
2584         LIBCFS_KTIME_COMPARE
2585         LIBCFS_SHRINKER_COUNT
2586         # 3.13
2587         LIBCFS_MATCH_WILDCARD
2588         # 3.14
2589         LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
2590         # 3.15
2591         LIBCFS_IOV_ITER_HAS_TYPE
2592         # 3.16
2593         LIBCFS_HAVE_GLOB
2594         # 3.17
2595         LIBCFS_HLIST_ADD_AFTER
2596         LIBCFS_TIMESPEC64
2597         LIBCFS_KTIME_GET_NS
2598         LIBCFS_KTIME_GET_REAL_TS64
2599         LIBCFS_KTIME_GET_REAL_SECONDS
2600         LIBCFS_KTIME_GET_REAL_NS
2601         LIBCFS_KTIME_TO_TIMESPEC64
2602         LIBCFS_TIMESPEC64_SUB
2603         LIBCFS_TIMESPEC64_TO_KTIME
2604         # 3.19
2605         LIBCFS_KTIME_GET_SECONDS
2606         LIBCFS_WAIT_WOKEN
2607         # 4.0
2608         LIBCFS_KTIME_MS_DELTA
2609         # 4.1
2610         LIBCFS_KERNEL_PARAM_LOCK
2611         # 4.2
2612         LIBCFS_STRSCPY_EXISTS
2613         LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
2614         # 4.4
2615         LIBCFS_KSTRTOBOOL_FROM_USER
2616         LIBCFS_NETLINK_CALLBACK_START
2617         # 4.5
2618         LIBCFS_CRYPTO_HASH_HELPERS
2619         LIBCFS_RHASHTABLE_REPLACE
2620         # 4.6
2621         LIBCFS_BROKEN_HASH_64
2622         LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
2623         LIBCFS_GET_USER_PAGES_6ARG
2624         LIBCFS_STRINGHASH
2625         # 4.7
2626         LIBCFS_RHASHTABLE_INSERT_FAST
2627         LIBCFS_RHASHTABLE_WALK_INIT_3ARG
2628         # 4.8
2629         LIBCFS_HAVE_NR_ZONE_WRITE_PENDING
2630         LIBCFS_RHASHTABLE_LOOKUP
2631         LIBCFS_RHLTABLE
2632         LIBCFS_STACKTRACE_OPS
2633         # 4.9
2634         LIBCFS_GET_USER_PAGES_GUP_FLAGS
2635         LIBCFS_RHASHTABLE_WALK_ENTER
2636         # 4.10
2637         LIBCFS_HOTPLUG_STATE_MACHINE
2638         # 4.11
2639         LIBCFS_NL_EXT_ACK
2640         LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2641         LIBCFS_SCHED_HEADERS
2642         LIBCFS_KREF_READ
2643         LIBCFS_RHT_BUCKET_VAR
2644         # 4.12
2645         LIBCFS_CPUS_READ_LOCK
2646         LIBCFS_HAVE_PROCESSOR_HEADER
2647         LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
2648         LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
2649         LIBCFS_REFCOUNT_T
2650         LIBCFS_MEMALLOC_NORECLAIM
2651         # 4.13
2652         LIBCFS_NLA_STRDUP
2653         LIBCFS_WAIT_QUEUE_ENTRY
2654         # 4.14
2655         LIBCFS_DEFINE_TIMER
2656         LIBCFS_NEW_KERNEL_WRITE
2657         LIBCFS_NEW_KERNEL_READ
2658         # 4.15
2659         LIBCFS_BITMAP_TO_ARR32
2660         LIBCFS_TIMER_SETUP
2661         # 4.16
2662         LIBCFS_HAVE_NS_TO_TIMESPEC64
2663         LIBCFS_WAIT_VAR_EVENT
2664         # 4.17
2665         LIBCFS_BITMAP_ALLOC
2666         LIBCFS_CLEAR_AND_WAKE_UP_BIT
2667         # 4.18
2668         LIBCFS_TCP_SOCK_SET_NODELAY
2669         LIBCFS_TCP_SOCK_SET_KEEPIDLE
2670         # 4.19
2671         LIBCFS_XARRAY_SUPPORT
2672         LIBCFS_NL_DUMP_EXT_ACK
2673         # 4.20
2674         LIBCFS_HAVE_IOV_ITER_TYPE
2675         # 5.0
2676         LIBCFS_MM_TOTALRAM_PAGES_FUNC
2677         LIBCFS_GET_REQUEST_KEY_AUTH
2678         # 5.2
2679         LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
2680         LIBCFS_USER_UID_KEYRING
2681         # 5.3
2682         LIBCFS_LOOKUP_USER_KEY
2683         LIBCFS_CACHE_DETAIL_WRITERS
2684         # 5.4
2685         LIBCFS_GENL_DUMPIT_INFO
2686         # 5.6
2687         LIBCFS_HAVE_PROC_OPS
2688         # 5.7
2689         LIBCFS_TCP_SOCK_SET_QUICKACK
2690         LIBCFS_TCP_SOCK_SET_KEEPINTVL
2691         LIBCFS_TCP_SOCK_SET_KEEPCNT
2692         # 5.8
2693         LIBCFS_IP6_SET_PREF
2694         LIBCFS_IP_SET_TOS
2695         LIBCFS_VMALLOC_2ARGS
2696         LIBCFS_HAVE_NR_UNSTABLE_NFS
2697         LIBCFS_KERNEL_SETSOCKOPT
2698         LIBCFS_KEY_NEED_UNLINK
2699         LIBCFS_SEC_RELEASE_SECCTX
2700         # 5.10
2701         LIBCFS_HAVE_KFREE_SENSITIVE
2702         LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2703         LIBCFS_HAVE_LIST_CMP_FUNC_T
2704         LIBCFS_NLA_STRLCPY
2705         # 5.12
2706         LIBCFS_LINUX_FORTIFY_STRING_HEADER
2707         LIBCFS_HAVE_CIPHER_HEADER
2708         # 5.13
2709         LIBCFS_HAVE_TASK_IS_RUNNING
2710         # 5.14
2711         LIBCFS_LINUX_STDARG_HEADER
2712         LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2713         # 5.15
2714         LIBCFS_PARAM_SET_UINT_MINMAX
2715         # 5.17
2716         LIBCFS_PDE_DATA_EXISTS
2717         LIBCFS_BIO_ALLOC_WITH_BDEV
2718         # 6.2
2719         LIBCFS_TIMER_DELETE_SYNC
2720         LIBCFS_TIMER_DELETE
2721 ])
2722
2723 #
2724 # LIBCFS_PROG_LINUX
2725 #
2726 # LibCFS linux kernel checks
2727 #
2728 AC_DEFUN([LIBCFS_PROG_LINUX], [
2729 AC_MSG_NOTICE([LibCFS kernel checks
2730 ==============================================================================])
2731 LIBCFS_CONFIG_PANIC_DUMPLOG
2732
2733 # 4.6 - Export Check
2734 LIBCFS_EXPORT_KSET_FIND_OBJ
2735 # 4.13 - Export Check
2736 LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
2737 # 5.0 - Export Check
2738 LIBCFS_GENRADIX
2739 # 5.7 - Export Check
2740 LIBCFS_KALLSYMS_LOOKUP
2741 ]) # LIBCFS_PROG_LINUX
2742
2743 #
2744 # LIBCFS_PATH_DEFAULTS
2745 #
2746 # default paths for installed files
2747 #
2748 AC_DEFUN([LIBCFS_PATH_DEFAULTS], [
2749 ]) # LIBCFS_PATH_DEFAULTS
2750
2751 #
2752 # LIBCFS_CONFIGURE
2753 #
2754 # other configure checks
2755 #
2756 AC_DEFUN([LIBCFS_CONFIGURE], [
2757 AC_MSG_NOTICE([LibCFS core checks
2758 ==============================================================================])
2759
2760 # libcfs/libcfs/util/nidstrings.c
2761 AC_CHECK_HEADERS([netdb.h asm/types.h endian.h])
2762
2763 # --------  Check for required packages  --------------
2764
2765 AC_MSG_NOTICE([LibCFS required packages checks
2766 ==============================================================================])
2767
2768 AC_MSG_CHECKING([whether to enable readline support])
2769 AC_ARG_ENABLE(readline,
2770         AS_HELP_STRING([--disable-readline],
2771                 [disable readline support]),
2772         [], [enable_readline="yes"])
2773 AC_MSG_RESULT([$enable_readline])
2774
2775 LIBREADLINE=""
2776 AS_IF([test "x$enable_readline" = xyes], [
2777         AC_CHECK_LIB([readline], [readline], [
2778                 LIBREADLINE="-lreadline"
2779                 AC_DEFINE(HAVE_LIBREADLINE, 1,
2780                         [readline library is available])
2781         ])
2782
2783         AC_SUBST(ENABLE_READLINE, yes)
2784 ], [
2785         AC_SUBST(ENABLE_READLINE, no)
2786 ])
2787 AC_SUBST(LIBREADLINE)
2788
2789 AC_MSG_CHECKING([whether to use libpthread for libcfs library])
2790 AC_ARG_ENABLE([libpthread],
2791         AS_HELP_STRING([--disable-libpthread],
2792                 [disable libpthread]),
2793         [], [enable_libpthread="yes"])
2794 AC_MSG_RESULT([$enable_libpthread])
2795
2796 PTHREAD_LIBS=""
2797 AS_IF([test "x$enable_libpthread" = xyes], [
2798         AC_CHECK_LIB([pthread], [pthread_create], [
2799                 PTHREAD_LIBS="-lpthread"
2800                 AC_DEFINE([HAVE_LIBPTHREAD], 1,
2801                         [use libpthread for libcfs library])
2802         ])
2803
2804         AC_SUBST(ENABLE_LIBPTHREAD, yes)
2805 ], [
2806         AC_SUBST(ENABLE_LIBPTHREAD, no)
2807         AC_MSG_WARN([Using libpthread for libcfs library is disabled explicitly])
2808 ])
2809 AC_SUBST(PTHREAD_LIBS)
2810 ]) # LIBCFS_CONFIGURE
2811
2812 #
2813 # LIBCFS_CONFIG_FILES
2814 #
2815 # files that should be generated with AC_OUTPUT
2816 #
2817 AC_DEFUN([LIBCFS_CONFIG_FILES], [
2818 AC_CONFIG_FILES([
2819 libcfs/Makefile
2820 libcfs/autoMakefile
2821 libcfs/autoconf/Makefile
2822 libcfs/include/Makefile
2823 libcfs/include/libcfs/Makefile
2824 libcfs/include/uapi/Makefile
2825 libcfs/include/libcfs/linux/Makefile
2826 libcfs/include/libcfs/util/Makefile
2827 libcfs/include/libcfs/crypto/Makefile
2828 libcfs/include/uapi/linux/Makefile
2829 libcfs/libcfs/Makefile
2830 libcfs/libcfs/autoMakefile
2831 libcfs/libcfs/linux/Makefile
2832 libcfs/libcfs/util/Makefile
2833 libcfs/libcfs/crypto/Makefile
2834 ])
2835 ]) # LIBCFS_CONFIG_FILES