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