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         AC_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
  16 AC_MSG_CHECKING([whether to enable ENTRY/EXIT])
  17 AC_ARG_ENABLE([libcfs_trace],
  18         AC_HELP_STRING([--disable-libcfs-trace],
  19                 [disable libcfs ENTRY/EXIT]),
  20         [], [enable_libcfs_trace="yes"])
  21 AC_MSG_RESULT([$enable_libcfs_trace])
  22 AS_IF([test "x$enable_libcfs_trace" = xyes],
  23         [AC_DEFINE(CDEBUG_ENTRY_EXIT, 1, [enable libcfs ENTRY/EXIT])])
  24
  25 AC_MSG_CHECKING([whether to enable LASSERT, LASSERTF])
  26 AC_ARG_ENABLE([libcfs_assert],
  27         AC_HELP_STRING([--disable-libcfs-assert],
  28                 [disable libcfs LASSERT, LASSERTF]),
  29         [], [enable_libcfs_assert="yes"])
  30 AC_MSG_RESULT([$enable_libcfs_assert])
  31 AS_IF([test x$enable_libcfs_assert = xyes],
  32         [AC_DEFINE(LIBCFS_DEBUG, 1, [enable libcfs LASSERT, LASSERTF])])
  33 ]) # LIBCFS_CONFIG_CDEBUG
  34
  35 #
  36 # LIBCFS_CONFIG_PANIC_DUMPLOG
  37 #
  38 # check if tunable panic_dumplog is wanted
  39 #
  40 AC_DEFUN([LIBCFS_CONFIG_PANIC_DUMPLOG], [
  41 AC_MSG_CHECKING([whether to use tunable 'panic_dumplog' support])
  42 AC_ARG_ENABLE([panic_dumplog],
  43         AC_HELP_STRING([--enable-panic_dumplog],
  44                 [enable panic_dumplog]),
  45         [], [enable_panic_dumplog="no"])
  46 AC_MSG_RESULT([$enable_panic_dumplog])
  47 AS_IF([test "x$enable_panic_dumplog" = xyes],
  48         [AC_DEFINE(LNET_DUMP_ON_PANIC, 1, [use dumplog on panic])])
  49 ]) # LIBCFS_CONFIG_PANIC_DUMPLOG
  50
  51 #
  52 # Kernel version 3.11 introduced ktime_get_ts64
  53 #
  54 AC_DEFUN([LIBCFS_KTIME_GET_TS64],[
  55 LB_CHECK_COMPILE([does function 'ktime_get_ts64' exist],
  56 ktime_get_ts64, [
  57         #include <linux/hrtimer.h>
  58         #include <linux/ktime.h>
  59 ],[
  60         struct timespec64 *ts = NULL;
  61
  62         ktime_get_ts64(ts);
  63 ],[
  64         AC_DEFINE(HAVE_KTIME_GET_TS64, 1,
  65                 ['ktime_get_ts64' is available])
  66 ])
  67 ]) # LIBCFS_KTIME_GET_TS64
  68
  69 #
  70 # Kernel version 3.12-rc4 commit c2d816443ef30 added prepare_to_wait_event()
  71 #
  72 AC_DEFUN([LIBCFS_PREPARE_TO_WAIT_EVENT],[
  73 LB_CHECK_COMPILE([does function 'prepare_to_wait_event' exist],
  74 prepare_to_wait_event, [
  75         #include <linux/wait.h>
  76 ],[
  77         prepare_to_wait_event(NULL, NULL, 0);
  78 ],[
  79         AC_DEFINE(HAVE_PREPARE_TO_WAIT_EVENT, 1,
  80                 ['prepare_to_wait_event' is available])
  81 ])
  82 ]) # LIBCFS_PREPARE_TO_WAIT_EVENT
  83
  84 #
  85 # Linux kernel 3.12 introduced struct kernel_param_ops
  86 # This has been backported to all lustre supported
  87 # clients except RHEL6. We have to handle the differences.
  88 #
  89 AC_DEFUN([LIBCFS_KERNEL_PARAM_OPS],[
  90 LB_CHECK_COMPILE([does 'struct kernel_param_ops' exist],
  91 kernel_param_ops, [
  92         #include <linux/module.h>
  93 ],[
  94         struct kernel_param_ops ops;
  95
  96         ops.set = NULL;
  97 ],[
  98         AC_DEFINE(HAVE_KERNEL_PARAM_OPS, 1,
  99                 ['struct kernel_param_ops' is available])
 100 ])
 101 ]) # LIBCFS_KERNEL_PARAM_OPS
 102
 103 #
 104 # Kernel version 3.12 introduced ktime_add
 105 #
 106 AC_DEFUN([LIBCFS_KTIME_ADD],[
 107 LB_CHECK_COMPILE([does function 'ktime_add' exist],
 108 ktime_add, [
 109         #include <linux/hrtimer.h>
 110         #include <linux/ktime.h>
 111 ],[
 112         ktime_t start = ktime_set(0, 0);
 113         ktime_t end = start;
 114         ktime_t total;
 115
 116         total = ktime_add(start, end);
 117 ],[
 118         AC_DEFINE(HAVE_KTIME_ADD, 1,
 119                 [ktime_add is available])
 120 ])
 121 ]) # LIBCFS_KTIME_ADD
 122
 123 #
 124 # Kernel version 3.12 introduced ktime_after
 125 #
 126 AC_DEFUN([LIBCFS_KTIME_AFTER],[
 127 LB_CHECK_COMPILE([does function 'ktime_after' exist],
 128 ktime_after, [
 129         #include <linux/hrtimer.h>
 130         #include <linux/ktime.h>
 131 ],[
 132         ktime_t start = ktime_set(0, 0);
 133         ktime_t end = start;
 134
 135         ktime_after(start, end);
 136 ],[
 137         AC_DEFINE(HAVE_KTIME_AFTER, 1,
 138                 [ktime_after is available])
 139 ])
 140 ]) # LIBCFS_KTIME_AFTER
 141
 142 #
 143 # Kernel version 3.12 introduced ktime_before
 144 # See linux commit 67cb9366ff5f99868100198efba5ca88aaa6ad25
 145 #
 146 AC_DEFUN([LIBCFS_KTIME_BEFORE],[
 147 LB_CHECK_COMPILE([does function 'ktime_before' exist],
 148 ktime_before, [
 149         #include <linux/hrtimer.h>
 150         #include <linux/ktime.h>
 151 ],[
 152         ktime_t start = ktime_set(0, 0);
 153         ktime_t end = start;
 154
 155         ktime_before(start, end);
 156 ],[
 157         AC_DEFINE(HAVE_KTIME_BEFORE, 1,
 158                 [ktime_before is available])
 159 ])
 160 ]) # LIBCFS_KTIME_BEFORE
 161
 162 #
 163 # Kernel version 3.12 introduced ktime_compare
 164 #
 165 AC_DEFUN([LIBCFS_KTIME_COMPARE],[
 166 LB_CHECK_COMPILE([does function 'ktime_compare' exist],
 167 ktime_compare, [
 168         #include <linux/hrtimer.h>
 169         #include <linux/ktime.h>
 170 ],[
 171         ktime_t start = ktime_set(0, 0);
 172         ktime_t end = start;
 173
 174         ktime_compare(start, end);
 175 ],[
 176         AC_DEFINE(HAVE_KTIME_COMPARE, 1,
 177                 [ktime_compare is available])
 178 ])
 179 ]) # LIBCFS_KTIME_COMPARE
 180
 181 #
 182 # FC19 3.12 kernel struct shrinker change
 183 #
 184 AC_DEFUN([LIBCFS_SHRINKER_COUNT],[
 185 LB_CHECK_COMPILE([shrinker has 'count_objects'],
 186 shrinker_count_objects, [
 187         #include <linux/mmzone.h>
 188         #include <linux/shrinker.h>
 189 ],[
 190         struct shrinker shrinker;
 191
 192         shrinker.count_objects = NULL;
 193 ],[
 194         AC_DEFINE(HAVE_SHRINKER_COUNT, 1,
 195                 [shrinker has count_objects member])
 196 ])
 197 ]) # LIBCFS_SHRINKER_COUNT
 198
 199 #
 200 # LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
 201 #
 202 # v3.14-7405-g91b0abe36a7b added AS_EXITING flag with
 203 # mapping_exiting() and mapping_set_exiting()
 204 #
 205 AC_DEFUN([LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG], [
 206 m4_pattern_allow([AS_EXITING])
 207 tmp_flags="$EXTRA_KCFLAGS"
 208 EXTRA_KCFLAGS="-Werror"
 209 LB_CHECK_COMPILE([if enum mapping_flags has AS_EXITING flag],
 210 mapping_exiting_exists, [
 211         #include <linux/pagemap.h>
 212 ],[
 213         enum mapping_flags flag = AS_EXITING;
 214         (void)flag;
 215 ],[
 216         AC_DEFINE(HAVE_MAPPING_AS_EXITING_FLAG, 1,
 217                 [enum mapping_flags has AS_EXITING flag])
 218 ])
 219 EXTRA_KCFLAGS="$tmp_flags"
 220 ]) # LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
 221
 222 #
 223 # LIBCFS_IOV_ITER_HAS_TYPE
 224 #
 225 # kernel 3.15-rc4 commit 71d8e532b1549a478e6a6a8a44f309d050294d00
 226 # start adding the tag to iov_iter
 227 #
 228 AC_DEFUN([LIBCFS_IOV_ITER_HAS_TYPE], [
 229 tmp_flags="$EXTRA_KCFLAGS"
 230 EXTRA_KCFLAGS="-Werror"
 231 LB_CHECK_COMPILE([if iov_iter has member type],
 232 iov_iter_has_type_member, [
 233         #include <linux/uio.h>
 234 ],[
 235         struct iov_iter iter = { .type = ITER_KVEC };
 236         (void)iter;
 237 ],[
 238         AC_DEFINE(HAVE_IOV_ITER_HAS_TYPE_MEMBER, 1,
 239                 [if iov_iter has member type])
 240 ])
 241 EXTRA_KCFLAGS="$tmp_flags"
 242 ]) # LIBCFS_IOV_ITER_HAS_TYPE
 243
 244 #
 245 # LIBCFS_HAVE_NS_TO_TIMESPEC64
 246 #
 247 # Kernel version 4.16-rc3 commit a84d1169164b274f13b97a23ff235c000efe3b49
 248 # introduced struct __kernel_old_timeval
 249 #
 250 AC_DEFUN([LIBCFS_HAVE_NS_TO_TIMESPEC64],[
 251 LB_CHECK_COMPILE([does 'ns_to_timespec64()' exist],
 252 kernel_old_timeval, [
 253         #include <linux/time.h>
 254 ],[
 255         struct timespec64 kts;
 256
 257         kts = ns_to_timespec64(0);
 258 ],[
 259         AC_DEFINE(HAVE_NS_TO_TIMESPEC64, 1,
 260                 [ns_to_timespec64() is available])
 261 ])
 262 ]) # LIBCFS_HAVE_NS_TO_TIMESPEC64
 263
 264 #
 265 # Kernel version 3.17 changed hlist_add_after to
 266 # hlist_add_behind
 267 #
 268 AC_DEFUN([LIBCFS_HLIST_ADD_AFTER],[
 269 LB_CHECK_COMPILE([does function 'hlist_add_after' exist],
 270 hlist_add_after, [
 271         #include <linux/list.h>
 272 ],[
 273         hlist_add_after(NULL, NULL);
 274 ],[
 275         AC_DEFINE(HAVE_HLIST_ADD_AFTER, 1,
 276                 [hlist_add_after is available])
 277 ])
 278 ]) # LIBCFS_HLIST_ADD_AFTER
 279
 280 #
 281 # Kernel version 3.17 introduced struct timespec64
 282 #
 283 AC_DEFUN([LIBCFS_TIMESPEC64],[
 284 LB_CHECK_COMPILE([does 'struct timespec64' exist],
 285 timespec64, [
 286         #include <linux/time.h>
 287 ],[
 288         struct timespec64 ts;
 289
 290         ts.tv_sec = 0;
 291         ts.tv_nsec = 0;
 292 ],[
 293         AC_DEFINE(HAVE_TIMESPEC64, 1,
 294                 ['struct timespec64' is available])
 295 ])
 296 ]) # LIBCFS_TIMESPEC64
 297
 298 #
 299 # Kernel version 3.17 introduced ktime_get_real_ts64
 300 #
 301 AC_DEFUN([LIBCFS_KTIME_GET_REAL_TS64],[
 302 LB_CHECK_COMPILE([does function 'ktime_get_real_ts64' exist],
 303 ktime_get_real_ts64, [
 304         #include <linux/ktime.h>
 305 ],[
 306         struct timespec64 *ts = NULL;
 307
 308         ktime_get_real_ts64(ts);
 309 ],[
 310         AC_DEFINE(HAVE_KTIME_GET_REAL_TS64, 1,
 311                 ['ktime_get_real_ts64' is available])
 312 ])
 313 ]) # LIBCFS_KTIME_GET_REAL_TS64
 314
 315 #
 316 # Kernel version 3.17 introduced ktime_get_real_seconds
 317 #
 318 AC_DEFUN([LIBCFS_KTIME_GET_REAL_SECONDS],[
 319 LB_CHECK_COMPILE([does function 'ktime_get_real_seconds' exist],
 320 ktime_get_real_seconds, [
 321         #include <linux/hrtimer.h>
 322         #include <linux/ktime.h>
 323 ],[
 324         time64_t now;
 325
 326         now = ktime_get_real_seconds();
 327 ],[
 328         AC_DEFINE(HAVE_KTIME_GET_REAL_SECONDS, 1,
 329                 ['ktime_get_real_seconds' is available])
 330 ])
 331 ]) # LIBCFS_KTIME_GET_REAL_SECONDS
 332
 333 #
 334 # Kernel version 3.17 created ktime_get_ns wrapper
 335 #
 336 AC_DEFUN([LIBCFS_KTIME_GET_NS],[
 337 LB_CHECK_COMPILE([does function 'ktime_get_ns' exist],
 338 ktime_get_ns, [
 339         #include <linux/hrtimer.h>
 340         #include <linux/ktime.h>
 341 ],[
 342         u64 nanoseconds;
 343
 344         nanoseconds = ktime_get_ns();
 345 ],[],[
 346         AC_DEFINE(NEED_KTIME_GET_NS, 1,
 347                 ['ktime_get_ns' is not available])
 348 ])
 349 ]) # LIBCFS_KTIME_GET_NS
 350
 351 #
 352 # Kernel version 3.17 created ktime_get_real_ns wrapper
 353 #
 354 AC_DEFUN([LIBCFS_KTIME_GET_REAL_NS],[
 355 LB_CHECK_COMPILE([does function 'ktime_get_real_ns' exist],
 356 ktime_get_real_ns, [
 357         #include <linux/hrtimer.h>
 358         #include <linux/ktime.h>
 359 ],[
 360         u64 nanoseconds;
 361
 362         nanoseconds = ktime_get_real_ns();
 363 ],[],[
 364         AC_DEFINE(NEED_KTIME_GET_REAL_NS, 1,
 365                 ['ktime_get_real_ns' is not available])
 366 ])
 367 ]) # LIBCFS_KTIME_GET_REAL_NS
 368
 369 #
 370 # Kernel version 3.17 introduced ktime_to_timespec64
 371 #
 372 AC_DEFUN([LIBCFS_KTIME_TO_TIMESPEC64],[
 373 LB_CHECK_COMPILE([does function 'ktime_to_timespec64' exist],
 374 ktime_to_timespec64, [
 375         #include <linux/hrtimer.h>
 376         #include <linux/ktime.h>
 377 ],[
 378         ktime_t now = ktime_set(0, 0);
 379         struct timespec64 ts;
 380
 381         ts = ktime_to_timespec64(now);
 382 ],[
 383         AC_DEFINE(HAVE_KTIME_TO_TIMESPEC64, 1,
 384                 ['ktime_to_timespec64' is available])
 385 ])
 386 ]) # LIBCFS_KTIME_TO_TIMESPEC64
 387
 388 #
 389 # Kernel version 3.17 introduced timespec64_sub
 390 #
 391 AC_DEFUN([LIBCFS_TIMESPEC64_SUB],[
 392 LB_CHECK_COMPILE([does function 'timespec64_sub' exist],
 393 timespec64_sub, [
 394         #include <linux/time.h>
 395 ],[
 396         struct timespec64 later = { }, earlier = { }, diff;
 397
 398         diff = timespec64_sub(later, earlier);
 399 ],[
 400         AC_DEFINE(HAVE_TIMESPEC64_SUB, 1,
 401                 ['timespec64_sub' is available])
 402 ])
 403 ]) # LIBCFS_TIMESPEC64_SUB
 404
 405 #
 406 # Kernel version 3.17 introduced timespec64_to_ktime
 407 #
 408 AC_DEFUN([LIBCFS_TIMESPEC64_TO_KTIME],[
 409 LB_CHECK_COMPILE([does function 'timespec64_to_ktime' exist],
 410 timespec64_to_ktime, [
 411         #include <linux/ktime.h>
 412 ],[
 413         struct timespec64 ts;
 414         ktime_t now;
 415
 416         now = timespec64_to_ktime(ts);
 417 ],[
 418         AC_DEFINE(HAVE_TIMESPEC64_TO_KTIME, 1,
 419                 ['timespec64_to_ktime' is available])
 420 ])
 421 ]) # LIBCFS_TIMESPEC64_TO_KTIME
 422
 423 #
 424 # Kernel version 3.19 introduced ktime_get_seconds
 425 #
 426 AC_DEFUN([LIBCFS_KTIME_GET_SECONDS],[
 427 LB_CHECK_COMPILE([does function 'ktime_get_seconds' exist],
 428 ktime_get_seconds, [
 429         #include <linux/ktime.h>
 430 ],[
 431         time64_t now;
 432
 433         now = ktime_get_seconds();
 434 ],[
 435         AC_DEFINE(HAVE_KTIME_GET_SECONDS, 1,
 436                 ['ktime_get_seconds' is available])
 437 ])
 438 ]) # LIBCFS_KTIME_GET_SECONDS
 439
 440 #
 441 # Kernel version 3.19 commit v3.18-rc2-26-g61ada528dea0
 442 # introduce wait_woken()
 443 #
 444 AC_DEFUN([LIBCFS_WAIT_WOKEN],[
 445 LB_CHECK_COMPILE([does function 'wait_woken' exist],
 446 wait_woken, [
 447         #include <linux/wait.h>
 448 ],[
 449         wait_woken(NULL, 0, 0);
 450 ],[
 451         AC_DEFINE(HAVE_WAIT_WOKEN, 1,
 452                 ['wait_woken, is available'])
 453 ])
 454 ]) # LIBCFS_WAIT_WOKEN
 455
 456 #
 457 # Kernel version 4.0 commit 41fbf3b39d5eca01527338b4d0ee15ee1ae1023c
 458 # introduced the helper function ktime_ms_delta.
 459 #
 460 AC_DEFUN([LIBCFS_KTIME_MS_DELTA],[
 461 LB_CHECK_COMPILE([does function 'ktime_ms_delta' exist],
 462 ktime_ms_delta, [
 463         #include <linux/ktime.h>
 464 ],[
 465         ktime_t start = ktime_set(0, 0);
 466         ktime_t end = start;
 467
 468         ktime_ms_delta(start, end);
 469 ],[
 470         AC_DEFINE(HAVE_KTIME_MS_DELTA, 1,
 471                 ['ktime_ms_delta' is available])
 472 ])
 473 ]) # LIBCFS_KTIME_MS_DELTA
 474
 475 #
 476 # Kernel version 4.1 commit b51d23e4e9fea6f264d39535c2a62d1f51e7ccc3
 477 # create per module locks which added kernel_param_[un]lock(). Older
 478 # kernels you have to use __kernel_param_[un]lock(). In that case its
 479 # a global lock for all modules but that is okay since its a rare event.
 480 #
 481 AC_DEFUN([LIBCFS_KERNEL_PARAM_LOCK],[
 482 LB_CHECK_COMPILE([does function 'kernel_param_[un]lock' exist],
 483 kernel_param_lock, [
 484         #include <linux/moduleparam.h>
 485 ],[
 486         kernel_param_lock(NULL);
 487         kernel_param_unlock(NULL);
 488 ],[
 489         AC_DEFINE(HAVE_KERNEL_PARAM_LOCK, 1,
 490                 ['kernel_param_[un]lock' is available])
 491 ])
 492 ]) # LIBCFS_KERNEL_PARAM_LOCK
 493
 494 #
 495 # Kernel version 4.2 changed topology_thread_cpumask
 496 # to topology_sibling_cpumask
 497 #
 498 AC_DEFUN([LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 499 LB_CHECK_COMPILE([does function 'topology_sibling_cpumask' exist],
 500 topology_sibling_cpumask, [
 501         #include <linux/topology.h>
 502 ],[
 503         const struct cpumask *mask;
 504
 505         mask = topology_sibling_cpumask(0);
 506 ],[
 507         AC_DEFINE(HAVE_TOPOLOGY_SIBLING_CPUMASK, 1,
 508                 [topology_sibling_cpumask is available])
 509 ])
 510 ]) # LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
 511
 512 #
 513 # Kernel version 4.4 commit ef951599074ba4fad2d0efa0a977129b41e6d203
 514 # introduced kstrtobool and kstrtobool_from_user.
 515 #
 516 AC_DEFUN([LIBCFS_KSTRTOBOOL_FROM_USER], [
 517 LB_CHECK_COMPILE([if Linux kernel has 'kstrtobool_from_user'],
 518 kstrtobool_from_user, [
 519         #include <linux/kernel.h>
 520 ],[
 521         bool result;
 522         return kstrtobool_from_user(NULL, 0, &result);
 523 ],[
 524         AC_DEFINE(HAVE_KSTRTOBOOL_FROM_USER, 1,
 525                 [kernel has kstrtobool_from_user])
 526 ])
 527 ]) # LIBCFS_KSTRTOBOOL_FROM_USER
 528
 529 #
 530 # LIBCFS_NETLINK_CALLBACK_START
 531 #
 532 # Kernel version 4.4-rc3 commit fc9e50f5a5a4e1fa9ba2756f745a13e693cf6a06
 533 # added a start function callback for struct netlink_callback
 534 #
 535 AC_DEFUN([LIBCFS_NETLINK_CALLBACK_START], [
 536 LB_CHECK_COMPILE([if struct genl_ops has start callback],
 537 cb_start, [
 538         #include <net/genetlink.h>
 539 ],[
 540         struct genl_ops ops;
 541
 542         ops.start = NULL;
 543 ],[
 544         AC_DEFINE(HAVE_NETLINK_CALLBACK_START, 1,
 545                 [struct genl_ops has 'start' callback])
 546 ])
 547 ]) # LIBCFS_NETLINK_CALLBACK_START
 548
 549 #
 550 # Kernel version 4.5-rc1 commit d12481bc58fba89427565f8592e88446ec084a24
 551 # added crypto hash helpers
 552 #
 553 AC_DEFUN([LIBCFS_CRYPTO_HASH_HELPERS], [
 554 LB_CHECK_COMPILE([does crypto hash helper functions exist],
 555 crypto_hash_helpers, [
 556         #include <crypto/hash.h>
 557 ],[
 558         crypto_ahash_alg_name(NULL);
 559         crypto_ahash_driver_name(NULL);
 560 ],[
 561         AC_DEFINE(HAVE_CRYPTO_HASH_HELPERS, 1,
 562                 [crypto hash helper functions are available])
 563 ])
 564 ]) # LIBCFS_CRYPTO_HASH_HELPERS
 565
 566 #
 567 # Kernel version 4.5-rc1 commit 3502cad73c4bbf8f6365d539e814159275252c59
 568 # introduced rhashtable_replace_fast
 569 #
 570 AC_DEFUN([LIBCFS_RHASHTABLE_REPLACE], [
 571 LB_CHECK_COMPILE([if 'rhashtable_replace_fast' exists],
 572 rhashtable_replace_fast, [
 573         #include <linux/rhashtable.h>
 574 ],[
 575         const struct rhashtable_params params = { 0 };
 576
 577         rhashtable_replace_fast(NULL, NULL, NULL, params);
 578 ],[
 579         AC_DEFINE(HAVE_RHASHTABLE_REPLACE, 1,
 580                 [rhashtable_replace_fast() is available])
 581 ])
 582 ]) # LIBCFS_RHASHTABLE_REPLACE
 583
 584 #
 585 # Kernel version 4.5-rc3 commit 2fe829aca9d7bed5fd6b49c6a1452e5e486b6cc3dd
 586 # made kset_find_obj() exportable to modules
 587 #
 588 AC_DEFUN([LIBCFS_EXPORT_KSET_FIND_OBJ], [
 589 LB_CHECK_EXPORT([kset_find_obj], [lib/kobject.c],
 590         [AC_DEFINE(HAVE_KSET_FIND_OBJ, 1,
 591                 [kset_find_obj is exported by the kernel])])
 592 ]) # LIBCFS_EXPORT_KSET_FIND_OBJ
 593
 594 #
 595 # Kernel version 4.6+ commit ef703f49a6c5b909a85149bb6625c4ed0d697186
 596 # fixed the brokenness of hash_64(). The fix removed GOLDEN_RATIO_PRIME_64
 597 # since it was a poor prime value.
 598 #
 599 AC_DEFUN([LIBCFS_BROKEN_HASH_64], [
 600 LB_CHECK_COMPILE([kernel has fixed hash_64()],
 601 broken_hash_64, [
 602         #include <linux/hash.h>
 603 ],[
 604         int tmp = GOLDEN_RATIO_PRIME_64;
 605 ],[
 606         AC_DEFINE(HAVE_BROKEN_HASH_64, 1, [kernel hash_64() is broken])
 607 ])
 608 ]) # LIBCFS_BROKEN_HASH_64
 609
 610 #
 611 # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 612 #
 613 # linux 4.6 kernel changed stacktrace_ops address to return an int
 614 #
 615 AC_DEFUN([LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 616 LB_CHECK_COMPILE([if 'struct stacktrace_ops' address function returns an int],
 617 stacktrace_ops_address_return_int, [
 618         #include <asm/stacktrace.h>
 619 ],[
 620         int rc;
 621
 622         rc = ((struct stacktrace_ops *)0)->address(NULL, 0, 0);
 623 ],[
 624         AC_DEFINE(STACKTRACE_OPS_ADDRESS_RETURN_INT, 1,
 625                 ['struct stacktrace_ops' address function returns an int])
 626 ])
 627 ]) # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 628
 629 #
 630 # Kernel version 4.6 removed both struct task_struct and struct mm_struct
 631 # arguments to get_user_pages
 632 #
 633 AC_DEFUN([LIBCFS_GET_USER_PAGES_6ARG], [
 634 LB_CHECK_COMPILE([if 'get_user_pages()' takes 6 arguments],
 635 get_user_pages_6arg, [
 636         #include <linux/mm.h>
 637 ],[
 638         int rc;
 639
 640         rc = get_user_pages(0, 0, 0, 0, NULL, NULL);
 641 ],[
 642         AC_DEFINE(HAVE_GET_USER_PAGES_6ARG, 1,
 643                 [get_user_pages takes 6 arguments])
 644 ])
 645 ]) # LIBCFS_GET_USER_PAGES_6ARG
 646
 647 #
 648 # LIBCFS_STRINGHASH
 649 #
 650 # 4.6 kernel created stringhash.h which moved stuff out of dcache.h
 651 # commit f4bcbe792b8f434e32487cff9d9e30ab45a3ce02
 652 #
 653 AC_DEFUN([LIBCFS_STRINGHASH], [
 654 LB_CHECK_LINUX_HEADER([linux/stringhash.h], [
 655         AC_DEFINE(HAVE_STRINGHASH, 1,
 656                 [stringhash.h is present])])
 657 ]) # LIBCFS_STRINGHASH
 658
 659 #
 660 # LIBCFS_RHASHTABLE_INSERT_FAST
 661 #
 662 # 4.7+ kernel commit 5ca8cc5bf11faed257c762018aea9106d529232f
 663 # changed __rhashtable_insert_fast to support the new function
 664 # rhashtable_lookup_get_insert_key().
 665 #
 666 AC_DEFUN([LIBCFS_RHASHTABLE_INSERT_FAST], [
 667 tmp_flags="$EXTRA_KCFLAGS"
 668 EXTRA_KCFLAGS="-Werror"
 669 LB_CHECK_COMPILE([if internal '__rhashtable_insert_fast()' returns int],
 670 rhashtable_insert_fast, [
 671         #include <linux/rhashtable.h>
 672 ],[
 673         const struct rhashtable_params params = { 0 };
 674         int rc;
 675
 676         rc = __rhashtable_insert_fast(NULL, NULL, NULL, params);
 677 ],[
 678         AC_DEFINE(HAVE_HASHTABLE_INSERT_FAST_RETURN_INT, 1,
 679                   ['__rhashtable_insert_fast()' returns int])
 680 ])
 681 EXTRA_KCFLAGS="$tmp_flags"
 682 ]) # LIBCFS_RHASHTABLE_INSERT_FAST
 683
 684 #
 685 # Kernel version 4.7-rc1 commit 8f6fd83c6c5ec66a4a70c728535ddcdfef4f3697
 686 # added 3rd arg to rhashtable_walk_init
 687 #
 688 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_INIT_3ARG], [
 689 LB_CHECK_COMPILE([if 'rhashtable_walk_init' has 3 args],
 690 rhashtable_walk_init, [
 691         #include <linux/gfp.h>
 692         #include <linux/rhashtable.h>
 693 ],[
 694         rhashtable_walk_init(NULL, NULL, GFP_KERNEL);
 695 ],[
 696         AC_DEFINE(HAVE_3ARG_RHASHTABLE_WALK_INIT, 1,
 697                 [rhashtable_walk_init() has 3 args])
 698 ])
 699 ]) # LIBCFS_RHASHTABLE_WALK_INIT_3ARG
 700
 701 #
 702 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 703 # introduced rhashtable_lookup
 704 #
 705 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP], [
 706 LB_CHECK_COMPILE([if 'rhashtable_lookup' exist],
 707 rhashtable_lookup, [
 708         #include <linux/rhashtable.h>
 709 ],[
 710         const struct rhashtable_params params = { 0 };
 711         void *ret;
 712
 713         ret = rhashtable_lookup(NULL, NULL, params);
 714 ],[
 715         AC_DEFINE(HAVE_RHASHTABLE_LOOKUP, 1,
 716                 [rhashtable_lookup() is available])
 717 ])
 718 ]) # LIBCFS_RHASHTABLE_LOOKUP
 719
 720 #
 721 # LIBCFS_RHLTABLE
 722 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 723 # created the rhlist interface to allow inserting duplicate objects
 724 # into the same table.
 725 #
 726 AC_DEFUN([LIBCFS_RHLTABLE], [
 727 LB_CHECK_COMPILE([does 'struct rhltable' exist],
 728 rhtable, [
 729         #include <linux/rhashtable.h>
 730 ],[
 731         struct rhltable *hlt;
 732
 733         rhltable_destroy(hlt);
 734 ],[
 735         AC_DEFINE(HAVE_RHLTABLE, 1,
 736                   [struct rhltable exist])
 737 ])
 738 ]) # LIBCFS_RHLTABLE
 739
 740 #
 741 # LIBCFS_STACKTRACE_OPS
 742 #
 743 # Kernel version 4.8 commit c8fe4609827aedc9c4b45de80e7cdc8ccfa8541b
 744 # removed both struct stacktrace_ops and dump_trace() function
 745 #
 746 AC_DEFUN([LIBCFS_STACKTRACE_OPS], [
 747 LB_CHECK_COMPILE([if 'struct stacktrace_ops' exists],
 748 stacktrace_ops, [
 749         struct task_struct;
 750         struct pt_regs;
 751         #include <asm/stacktrace.h>
 752 ],[
 753         struct stacktrace_ops ops;
 754         ops.stack = NULL;
 755 ],[
 756         AC_DEFINE(HAVE_STACKTRACE_OPS, 1,
 757                 [struct stacktrace_ops exists])
 758 ])
 759 ]) # LIBCFS_STACKTRACE_OPS
 760
 761 #
 762 # Kernel version 4.9-rc1 commit 246779dd090bd1b74d2652b3a6ca7759f593b27a
 763 # introduced rhashtable_walk_enter
 764 #
 765 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_ENTER], [
 766 LB_CHECK_COMPILE([if 'rhashtable_walk_enter' exists],
 767 rhashtable_walk_enter, [
 768         #include <linux/rhashtable.h>
 769 ],[
 770         rhashtable_walk_enter(NULL, NULL);
 771 ],[
 772         AC_DEFINE(HAVE_RHASHTABLE_WALK_ENTER, 1,
 773                 [rhashtable_walk_enter() is available])
 774 ])
 775 ]) # LIBCFS_RHASHTABLE_WALK_ENTER
 776
 777 #
 778 # Kernel version 4.9 commit 768ae309a96103ed02eb1e111e838c87854d8b51
 779 # mm: replace get_user_pages() write/force parameters with gup_flags
 780 #
 781 AC_DEFUN([LIBCFS_GET_USER_PAGES_GUP_FLAGS], [
 782 LB_CHECK_COMPILE([if 'get_user_pages()' takes gup_flags in arguments],
 783 get_user_pages_gup_flags, [
 784         #include <linux/mm.h>
 785 ],[
 786         int rc;
 787         rc = get_user_pages(0, 0, FOLL_WRITE, NULL, NULL);
 788 ],[
 789         AC_DEFINE(HAVE_GET_USER_PAGES_GUP_FLAGS, 1,
 790                 [get_user_pages takes gup_flags in arguments])
 791 ])
 792 ]) # LIBCFS_GET_USER_PAGES_GUP_FLAGS
 793
 794 #
 795 # Kernel version 4.10 commit 7b737965b33188bd3dbb44e938535c4006d97fbb
 796 # libcfs: Convert to hotplug state machine
 797 #
 798 AC_DEFUN([LIBCFS_HOTPLUG_STATE_MACHINE], [
 799 LB_CHECK_COMPILE([if libcfs supports CPU hotplug state machine],
 800 cpu_hotplug_state_machine, [
 801         #include <linux/cpuhotplug.h>
 802 ],[
 803         cpuhp_remove_state(CPUHP_LUSTRE_CFS_DEAD);
 804 ],[
 805         AC_DEFINE(HAVE_HOTPLUG_STATE_MACHINE, 1,
 806                 [hotplug state machine is supported])
 807 ])
 808 ]) # LIBCFS_HOTPLUG_STATE_MACHINE
 809
 810 #
 811 # Kernel version 4.10-rc3 commit f405df5de3170c00e5c54f8b7cf4766044a032ba
 812 # introduced refcount_t which is atomic_t plus over flow guards.
 813 #
 814 AC_DEFUN([LIBCFS_REFCOUNT_T], [
 815 tmp_flags="$EXTRA_KCFLAGS"
 816 EXTRA_KCFLAGS="-Werror"
 817 LB_CHECK_LINUX_HEADER([linux/refcount.h], [
 818         AC_DEFINE(HAVE_REFCOUNT_T, 1,
 819                 [refcount_t is supported])
 820 ])
 821 EXTRA_KCFLAGS="$tmp_flags"
 822 ]) # LIBCFS_REFCOUNT_T
 823
 824 #
 825 # Kernel version 4.12 commit 499118e966f1d2150bd66647c8932343c4e9a0b8
 826 # introduce memalloc_noreclaim_{save,restore}
 827 #
 828 AC_DEFUN([LIBCFS_MEMALLOC_NORECLAIM], [
 829 LB_CHECK_COMPILE([if memalloc_noreclaim_{save,restore} exist],
 830 memalloc_noreclaim, [
 831         #include <linux/sched/mm.h>
 832 ],[
 833         int flag = memalloc_noreclaim_save();
 834         memalloc_noreclaim_restore(flag);
 835 ],[
 836         AC_DEFINE(HAVE_MEMALLOC_RECLAIM, 1,
 837                 [memalloc_noreclaim_{save,restore}() is supported])
 838 ])
 839 ]) # LIBCFS_MEMALLOC_NORECLAIM
 840
 841 #
 842 # LIBCFS_SCHED_HEADERS
 843 #
 844 # 4.11 has broken up sched.h into more headers.
 845 #
 846 AC_DEFUN([LIBCFS_SCHED_HEADERS], [
 847 LB_CHECK_LINUX_HEADER([linux/sched/signal.h], [
 848         AC_DEFINE(HAVE_SCHED_HEADERS, 1,
 849                 [linux/sched header directory exist])])
 850 ]) # LIBCFS_SCHED_HEADERS
 851
 852 #
 853 # Kernel version 4.11-rc1 commit 2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e
 854 # introduce kref_read
 855 #
 856 AC_DEFUN([LIBCFS_KREF_READ], [
 857 LB_CHECK_COMPILE([if 'kref_read' exists],
 858 kref_read, [
 859         #include <linux/kref.h>
 860 ],[
 861         kref_read(NULL);
 862 ],[
 863         AC_DEFINE(HAVE_KREF_READ, 1,
 864                 [kref_read() is available])
 865 ])
 866 ]) # LIBCFS_KREF_READ
 867
 868 #
 869 # Kernel version 4.11-rc1 commit da20420f83ea0fbcf3d03afda08d971ea1d8a356
 870 # introduced rht_bucket_var
 871 #
 872 AC_DEFUN([LIBCFS_RHT_BUCKET_VAR], [
 873 LB_CHECK_COMPILE([if 'rht_bucket_var' exists],
 874 rht_bucket_var, [
 875         #include <linux/rhashtable.h>
 876 ],[
 877
 878         rht_bucket_var(NULL, 0);
 879 ],[
 880         AC_DEFINE(HAVE_RHT_BUCKET_VAR, 1,
 881                 [rht_bucket_var() is available])
 882 ])
 883 ]) # LIBCFS_RHT_BUCKET_VAR
 884
 885 #
 886 # Kernel version 4.11-rc5 commit fceb6435e85298f747fee938415057af837f5a8a
 887 # began the enhanchement of Netlink with extended ACK struct for advanced
 888 # error handling. By commit 7ab606d1609dd6dfeae9c8ad0a8a4e051d831e46 we
 889 # had full support for this new feature.
 890 #
 891 AC_DEFUN([LIBCFS_NL_EXT_ACK], [
 892 LB_CHECK_COMPILE([if Netlink supports netlink_ext_ack],
 893 netlink_ext_ack, [
 894         #include <net/genetlink.h>
 895 ],[
 896         struct genl_info info;
 897
 898         info.extack = NULL;
 899 ],[
 900         AC_DEFINE(HAVE_NL_PARSE_WITH_EXT_ACK, 1,
 901                 [netlink_ext_ack is an argument to nla_parse type function])
 902 ])
 903 ]) # LIBCFS_NL_EXT_ACK
 904
 905 #
 906 # Kernel version 4.11 commit f9fe1c12d126f9887441fa5bb165046f30ddd4b5
 907 # introduced rhashtable_lookup_get_insert_fast
 908 #
 909 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
 910 LB_CHECK_COMPILE([if 'rhashtable_lookup_get_insert_fast' exist],
 911 rhashtable_lookup_get_insert_fast, [
 912         #include <linux/rhashtable.h>
 913 ],[
 914         const struct rhashtable_params params = { 0 };
 915         void *ret;
 916
 917         ret = rhashtable_lookup_get_insert_fast(NULL, NULL, params);
 918 ],[
 919         AC_DEFINE(HAVE_RHASHTABLE_LOOKUP_GET_INSERT_FAST, 1,
 920                 [rhashtable_lookup_get_insert_fast() is available])
 921 ])
 922 ]) # LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
 923
 924 #
 925 # Kernel version 4.12-rc2 8f553c498e1772cccb39a114da4a498d22992758
 926 # provide proper CPU hotplug locking
 927 #
 928 AC_DEFUN([LIBCFS_CPUS_READ_LOCK], [
 929 LB_CHECK_COMPILE([if 'cpus_read_[un]lock' exist],
 930 cpu_read_lock, [
 931         #include <linux/cpu.h>
 932 ],[
 933         cpus_read_lock();
 934         cpus_read_unlock();
 935 ],[
 936         AC_DEFINE(HAVE_CPUS_READ_LOCK, 1, ['cpus_read_lock' exist])
 937 ])
 938 ]) # LIBCFS_CPUS_READ_LOCK
 939
 940 #
 941 # Kernel version 4.12-rc3 f9727a17db9bab71ddae91f74f11a8a2f9a0ece6
 942 # renamed uuid_be to uuid_t
 943 #
 944 AC_DEFUN([LIBCFS_UUID_T], [
 945 LB_CHECK_COMPILE([if 'uuid_t' exist],
 946 uuid_t, [
 947         #include <linux/uuid.h>
 948 ],[
 949         uuid_t uuid;
 950
 951         memset(uuid.b, 0, 16);
 952 ],[
 953         AC_DEFINE(HAVE_UUID_T, 1, ['uuid_t' exist])
 954 ])
 955 ]) # LIBCFS_UUID_T
 956
 957 #
 958 # Kernel version 4.12-rc3 commit fd851a3cdc196bfc1d229b5f22369069af532bf8
 959 # introduce processor.h
 960 #
 961 AC_DEFUN([LIBCFS_HAVE_PROCESSOR_HEADER], [
 962 tmp_flags="$EXTRA_KCFLAGS"
 963 EXTRA_KCFLAGS="-Werror"
 964 LB_CHECK_LINUX_HEADER([linux/processor.h], [
 965         AC_DEFINE(HAVE_PROCESSOR_H, 1,
 966                 [processor.h is present])
 967 ])
 968 EXTRA_KCFLAGS="$tmp_flags"
 969 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
 970
 971 #
 972 # Kernel verison 4.12-rc6 commit 5dd43ce2f69d42a71dcacdb13d17d8c0ac1fe8f7
 973 # created wait_bit.h
 974 #
 975 AC_DEFUN([LIBCFS_HAVE_WAIT_BIT_HEADER], [
 976 LB_CHECK_LINUX_HEADER([linux/wait_bit.h], [
 977         AC_DEFINE(HAVE_WAIT_BIT_HEADER_H, 1,
 978                 [wait_bit.h is present])])
 979 ]) # LIBCFS_HAVE_WAIT_BIT_HEADER
 980
 981 #
 982 # Kernel version 4.12-rc6 commmit 2055da97389a605c8a00d163d40903afbe413921
 983 # changed:
 984 #       struct wait_queue_head::task_list       => ::head
 985 #       struct wait_queue_entry::task_list      => ::entry
 986 #
 987 AC_DEFUN([LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME], [
 988 LB_CHECK_COMPILE([if linux wait_queue_head list_head is named head],
 989 wait_queue_task_list, [
 990         #include <linux/wait.h>
 991 ],[
 992         wait_queue_head_t e;
 993
 994         INIT_LIST_HEAD(&e.head);
 995 ],[
 996         AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_LIST, 1,
 997                 [linux wait_queue_head_t list_head is name head])
 998 ])
 999 ]) # LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
1000
1001 #
1002 # LIBCFS_NLA_STRDUP
1003 #
1004 # Kernel version 4.13-rc1 commit 2cf0c8b3e6942ecafe6ebb1a6d0328a81641bf39
1005 # created nla_strdup(). This is needed since push strings can be
1006 # any size.
1007 #
1008 AC_DEFUN([LIBCFS_NLA_STRDUP], [
1009 LB_CHECK_COMPILE([if 'nla_strdup()' exists],
1010 nla_strdup, [
1011         #include <net/netlink.h>
1012 ],[
1013         char *tmp = nla_strdup(NULL, GFP_KERNEL);
1014 ],[
1015         AC_DEFINE(HAVE_NLA_STRDUP, 1,
1016                 ['nla_strdup' is available])
1017 ])
1018 ]) # LIBCFS_NLA_STRDUP
1019
1020 #
1021 # LIBCFS_WAIT_QUEUE_ENTRY
1022 #
1023 # Kernel version 4.13 ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f
1024 # Rename wait_queue_t => wait_queue_entry_t
1025 #
1026 AC_DEFUN([LIBCFS_WAIT_QUEUE_ENTRY], [
1027 LB_CHECK_COMPILE([if 'wait_queue_entry_t' exists],
1028 wait_queue_entry, [
1029         #include <linux/wait.h>
1030 ],[
1031         wait_queue_entry_t e;
1032
1033         e.flags = 0;
1034 ],[
1035         AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY, 1,
1036                 ['wait_queue_entry_t' is available])
1037 ])
1038 ]) # LIBCFS_WAIT_QUEUE_ENTRY
1039
1040 #
1041 # LIBCFS_NEW_KERNEL_WRITE
1042 #
1043 # Kernel version 4.14 e13ec939e96b13e664bb6cee361cc976a0ee621a
1044 # changed kernel_write prototype to make is plug compatible
1045 # with the unexported vfs_write()
1046 #
1047 AC_DEFUN([LIBCFS_NEW_KERNEL_WRITE], [
1048 tmp_flags="$EXTRA_KCFLAGS"
1049 EXTRA_KCFLAGS="-Werror"
1050 LB_CHECK_COMPILE([if 'kernel_write' matches other read/write helpers],
1051 kernel_write_match, [
1052         #include <linux/fs.h>
1053 ],[
1054         const void *buf = NULL;
1055         loff_t pos = 0;
1056         return kernel_write(NULL, buf, 0, &pos);
1057 ],[
1058         AC_DEFINE(HAVE_NEW_KERNEL_WRITE, 1,
1059                 ['kernel_write' aligns with read/write helpers])
1060 ])
1061 EXTRA_KCFLAGS="$tmp_flags"
1062 ]) # LIBCFS_NEW_KERNEL_WRITE
1063
1064 #
1065 # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1066 #
1067 # kernel 5.0 commit ca79b0c211af63fa3276f0e3fd7dd9ada2439839
1068 # mm: convert totalram_pages and totalhigh_pages variables to atomic
1069 #
1070 AC_DEFUN([LIBCFS_MM_TOTALRAM_PAGES_FUNC], [
1071 tmp_flags="$EXTRA_KCFLAGS"
1072 EXTRA_KCFLAGS="-Werror"
1073 LB_CHECK_COMPILE([if totalram_pages is a function],
1074 totalram_pages, [
1075         #include <linux/mm.h>
1076 ],[
1077         totalram_pages_inc();
1078 ],[
1079         AC_DEFINE(HAVE_TOTALRAM_PAGES_AS_FUNC, 1,
1080                 [if totalram_pages is a function])
1081 ])
1082 EXTRA_KCFLAGS="$tmp_flags"
1083 ]) # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1084
1085 #
1086 # LIBCFS_NEW_KERNEL_READ
1087 #
1088 # 4.14 commit bdd1d2d3d251c65b74ac4493e08db18971c09240 changed
1089 # the signature of kernel_read to match other read/write helpers
1090 # and place offset last.
1091 #
1092 AC_DEFUN([LIBCFS_NEW_KERNEL_READ], [
1093 tmp_flags="$EXTRA_KCFLAGS"
1094 EXTRA_KCFLAGS="-Werror"
1095 LB_CHECK_COMPILE([if 'kernel_read()' has loff_t *pos as last parameter],
1096 kernel_read, [
1097         #include <linux/fs.h>
1098         ],[
1099         loff_t pos = 0;
1100         kernel_read(NULL, NULL, 0, &pos);
1101 ],[
1102         AC_DEFINE(HAVE_KERNEL_READ_LAST_POSP, 1,
1103                 [kernel_read() signature ends with loff_t *pos])
1104 ])
1105 EXTRA_KCFLAGS="$tmp_flags"
1106 ]) # LIBCFS_NEW_KERNEL_READ
1107
1108 #
1109 # LIBCFS_DEFINE_TIMER
1110 #
1111 # Kernel version 4.14 commit 1d27e3e2252ba9d949ca82fbdb73cde102cb2067
1112 # remove expires and data arguments from DEFINE_TIMER. Also the callback
1113 # when from using unsigned long argument to using struct timer_list pointer.
1114 #
1115 AC_DEFUN([LIBCFS_DEFINE_TIMER], [
1116 LB_CHECK_COMPILE([if DEFINE_TIMER takes only 2 arguments],
1117 define_timer, [
1118         #include <linux/timer.h>
1119 ],[
1120         static DEFINE_TIMER(my_timer, NULL);
1121 ],[
1122         AC_DEFINE(HAVE_NEW_DEFINE_TIMER, 1,
1123                 [DEFINE_TIMER uses only 2 arguements])
1124 ])
1125 ]) # LIBCFS_DEFINE_TIMER
1126
1127 #
1128 # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1129 #
1130 # Kernel 2.6.27 commit 8594698ebddeef5443b7da8258ae33b3eaca61d5
1131 # exported save_stack_trace_tsk for x86.
1132 # Kernel 2.6.27 commit 01f4b8b8b8db09b88be7df7e51192e4e678b69d3
1133 # exported save_stack_trace_tsk for powerpc
1134 # Kernel 4.13 commit e27c7fa015d61c8be6a2c32b2144aad2ae6ec975
1135 # exported save_stack_trace_tsk for arm64
1136 # Kernel 4.14 commit 9a3dc3186fc3795e076a4122da9e0258651a9631
1137 # exported save_stack_trace_tsk for arm
1138 #
1139 AC_DEFUN([LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK], [
1140 LB_CHECK_EXPORT([save_stack_trace_tsk], [arch/$SUBARCH/kernel/stacktrace.c],
1141         [AC_DEFINE(HAVE_SAVE_STACK_TRACE_TSK, 1,
1142                 [save_stack_trace_tsk is exported])])
1143 ]) # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1144
1145 #
1146 # LIBCFS_LOCKDEP_IS_HELD
1147 #
1148 # Kernel v4.15-rc8-106-g08f36ff64234
1149 # lockdep: Make lockdep checking constant
1150 #
1151 AC_DEFUN([LIBCFS_LOCKDEP_IS_HELD], [
1152 tmp_flags="$EXTRA_KCFLAGS"
1153 EXTRA_KCFLAGS="-Werror"
1154 LB_CHECK_COMPILE([if 'lockdep_is_held()' uses const argument],
1155 lockdep_is_held, [
1156         #include <linux/lockdep.h>
1157 ],[
1158 #ifdef CONFIG_LOCKDEP
1159         const struct spinlock *lock = NULL;
1160
1161         lockdep_is_held(lock);
1162 #endif
1163 ],[],[
1164         AC_DEFINE(NEED_LOCKDEP_IS_HELD_DISCARD_CONST, 1,
1165                 [lockdep_is_held() argument is const])
1166 ])
1167 EXTRA_KCFLAGS="$tmp_flags"
1168 ]) # LIBCFS_LOCKDEP_IS_HELD
1169
1170 #
1171 # LIBCFS_TIMER_SETUP
1172 #
1173 # Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
1174 # setup_timer() was replaced by timer_setup(), where the callback
1175 # argument is the structure already holding the struct timer_list.
1176 #
1177 AC_DEFUN([LIBCFS_TIMER_SETUP], [
1178 LB_CHECK_COMPILE([if setup_timer has been replaced with timer_setup],
1179 timer_setup, [
1180         #include <linux/timer.h>
1181 ],[
1182         timer_setup(NULL, NULL, 0);
1183 ],[
1184         AC_DEFINE(HAVE_TIMER_SETUP, 1,
1185                 [timer_setup has replaced setup_timer])
1186 ])
1187 ]) # LIBCFS_TIMER_SETUP
1188
1189 #
1190 # LIBCFS_WAIT_VAR_EVENT
1191 #
1192 # Kernel version 4.16-rc4 commit 6b2bb7265f0b62605e8caee3613449ed0db270b9
1193 # added wait_var_event()
1194 #
1195 AC_DEFUN([LIBCFS_WAIT_VAR_EVENT], [
1196 LB_CHECK_COMPILE([if 'wait_var_event' exist],
1197 wait_var_event, [
1198         #ifdef HAVE_WAIT_BIT_HEADER_H
1199         #include <linux/wait_bit.h>
1200         #endif
1201         #include <linux/wait.h>
1202 ],[
1203         wake_up_var(NULL);
1204 ],[
1205         AC_DEFINE(HAVE_WAIT_VAR_EVENT, 1,
1206                 ['wait_var_event' is available])
1207 ])
1208 ]) # LIBCFS_WAIT_VAR_EVENT
1209
1210 #
1211 # LIBCFS_BITMAP_ALLOC
1212 #
1213 # Kernel version 4.17 commit c42b65e363ce97a828f81b59033c3558f8fa7f70
1214 # added bitmap memory allocation handling.
1215 #
1216 AC_DEFUN([LIBCFS_BITMAP_ALLOC], [
1217 LB_CHECK_COMPILE([if Linux bitmap memory management exist],
1218 bitmap_alloc, [
1219         #include <linux/bitmap.h>
1220 ],[
1221         unsigned long *map = bitmap_alloc(1, GFP_KERNEL);
1222 ],[
1223         AC_DEFINE(HAVE_BITMAP_ALLOC, 1,
1224                 [Linux bitmap can be allocated])
1225 ])
1226 ]) # LIBCFS_BITMAP_ALLOC
1227
1228 #
1229 # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1230 #
1231 # Kernel version 4.17-rc2 commit 8236b0ae31c837d2b3a2565c5f8d77f637e824cc
1232 # added clear_and_wake_up_bit()
1233 #
1234 AC_DEFUN([LIBCFS_CLEAR_AND_WAKE_UP_BIT], [
1235 LB_CHECK_COMPILE([if 'clear_and_wake_up_bit' exist],
1236 clear_and_wake_up_bit, [
1237         #ifdef HAVE_WAIT_BIT_HEADER_H
1238         #include <linux/wait_bit.h>
1239         #endif
1240         #include <linux/wait.h>
1241 ],[
1242         clear_and_wake_up_bit(0, NULL);
1243 ],[
1244         AC_DEFINE(HAVE_CLEAR_AND_WAKE_UP_BIT, 1,
1245                 ['clear_and_wake_up_bit' is available])
1246 ])
1247 ]) # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1248
1249 #
1250 # LIBCFS_TCP_SOCK_SET_NODELAY
1251 #
1252 # kernel 4.18.0-293.el8
1253 # tcp_sock_set_nodelay() was added
1254 AC_DEFUN([LIBCFS_TCP_SOCK_SET_NODELAY], [
1255 tmp_flags="$EXTRA_KCFLAGS"
1256 EXTRA_KCFLAGS="-Werror"
1257 LB_CHECK_COMPILE([if 'tcp_sock_set_nodelay()' exists],
1258 tcp_sock_set_nodelay_exists, [
1259         #include <linux/tcp.h>
1260 ],[
1261         tcp_sock_set_nodelay(NULL);
1262 ],[
1263         AC_DEFINE(HAVE_TCP_SOCK_SET_NODELAY, 1,
1264                 ['tcp_sock_set_nodelay()' exists])
1265 ])
1266 EXTRA_KCFLAGS="$tmp_flags"
1267 ]) # LIBCFS_TCP_SOCK_SET_NODELAY
1268
1269 #
1270 # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1271 #
1272 # kernel 4.18.0-293.el8
1273 # tcp_sock_set_keepidle() was added
1274 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPIDLE], [
1275 tmp_flags="$EXTRA_KCFLAGS"
1276 EXTRA_KCFLAGS="-Werror"
1277 LB_CHECK_COMPILE([if 'tcp_sock_set_keepidle()' exists],
1278 tcp_sock_set_keepidle_exists, [
1279         #include <linux/tcp.h>
1280 ],[
1281         tcp_sock_set_keepidle(NULL, 0);
1282 ],[
1283         AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPIDLE, 1,
1284                 ['tcp_sock_set_keepidle()' exists])
1285 ])
1286 EXTRA_KCFLAGS="$tmp_flags"
1287 ]) # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1288
1289 #
1290 # LIBCFS_TCP_SOCK_SET_QUICKACK
1291 # kernel v5.7-rc6-2504-gddd061b8daed
1292 #   tcp: add tcp_sock_set_quickack
1293 #
1294 AC_DEFUN([LIBCFS_TCP_SOCK_SET_QUICKACK], [
1295 tmp_flags="$EXTRA_KCFLAGS"
1296 EXTRA_KCFLAGS="-Werror"
1297 LB_CHECK_COMPILE([if 'tcp_sock_set_quickack()' exists],
1298 tcp_sock_set_quickack_exists, [
1299         #include <linux/tcp.h>
1300 ],[
1301         tcp_sock_set_quickack(NULL, 0);
1302 ],[
1303         AC_DEFINE(HAVE_TCP_SOCK_SET_QUICKACK, 1,
1304                 ['tcp_sock_set_quickack()' exists])
1305 ])
1306 EXTRA_KCFLAGS="$tmp_flags"
1307 ]) # LIBCFS_TCP_SOCK_SET_QUICKACK
1308
1309 #
1310 # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1311 # v5.7-rc6-2508-gd41ecaac903c
1312 # tcp: add tcp_sock_set_keepintvl
1313 #
1314 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPINTVL], [
1315 tmp_flags="$EXTRA_KCFLAGS"
1316 EXTRA_KCFLAGS="-Werror"
1317 LB_CHECK_COMPILE([if 'tcp_sock_set_keepintvl()' exists],
1318 tcp_sock_set_keepintvl_exists, [
1319         #include <linux/tcp.h>
1320 ],[
1321         tcp_sock_set_keepintvl(NULL, 0);
1322 ],[
1323         AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPINTVL, 1,
1324                 ['tcp_sock_set_keepintvl()' exists])
1325 ])
1326 EXTRA_KCFLAGS="$tmp_flags"
1327 ]) # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1328
1329 #
1330 # LIBCFS_TCP_SOCK_SET_KEEPCNT
1331 # v5.7-rc6-2509-g480aeb9639d6
1332 # tcp: add tcp_sock_set_keepcnt
1333 #
1334 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPCNT], [
1335 tmp_flags="$EXTRA_KCFLAGS"
1336 EXTRA_KCFLAGS="-Werror"
1337 LB_CHECK_COMPILE([if 'tcp_sock_set_keepcnt()' exists],
1338 tcp_sock_set_keepcnt_exists, [
1339         #include <linux/tcp.h>
1340 ],[
1341         tcp_sock_set_keepcnt(NULL, 0);
1342 ],[
1343         AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPCNT, 1,
1344                 ['tcp_sock_set_keepcnt()' exists])
1345 ])
1346 EXTRA_KCFLAGS="$tmp_flags"
1347 ]) # LIBCFS_TCP_SOCK_SET_KEEPCNT
1348
1349 #
1350 # LIBCFS_XARRAY_SUPPORT
1351 #
1352 # 4.19-rc5 kernel commit 3159f943aafdbacb2f94c38fdaadabf2bbde2a14
1353 # replaced the radix tree implementation with Xarrays. This change
1354 # introduced functionaly needed for general Xarray support
1355 #
1356 AC_DEFUN([LIBCFS_XARRAY_SUPPORT], [
1357 tmp_flags="$EXTRA_KCFLAGS"
1358 EXTRA_KCFLAGS="-Werror"
1359 LB_CHECK_COMPILE([if page cache uses Xarray],
1360 xarray_support, [
1361         #include <linux/xarray.h>
1362 ],[
1363         xa_is_value(NULL);
1364 ],[
1365         AC_DEFINE(HAVE_XARRAY_SUPPORT, 1,
1366                 [kernel Xarray implementation lacks 'xa_is_value'])
1367 ])
1368 EXTRA_KCFLAGS="$tmp_flags"
1369 ]) # LIBCFS_XARRAY_SUPPORT
1370
1371 #
1372 # Kernel version 4.19-rc6 commit 4a19edb60d0203cd5bf95a8b46ea8f63fd41194c
1373 # added extended ACK handling to Netlink dump handlers
1374 #
1375 AC_DEFUN([LIBCFS_NL_DUMP_EXT_ACK], [
1376 LB_CHECK_COMPILE([if Netlink dump handlers support ext_ack],
1377 netlink_dump_ext_ack, [
1378         #include <net/netlink.h>
1379 ],[
1380         struct netlink_callback *cb = NULL;
1381         cb->extack = NULL;
1382 ],[
1383         AC_DEFINE(HAVE_NL_DUMP_WITH_EXT_ACK, 1,
1384                 [netlink_ext_ack is handled for Netlink dump handlers])
1385 ])
1386 ]) # LIBCFS_NL_DUMP_EXT_ACK
1387
1388 #
1389 # LIBCFS_HAVE_IOV_ITER_TYPE
1390 #
1391 # kernel 4.20 commit 00e23707442a75b404392cef1405ab4fd498de6b
1392 # iov_iter: Use accessor functions to access an iterator's type and direction.
1393 #
1394 AC_DEFUN([LIBCFS_HAVE_IOV_ITER_TYPE], [
1395 tmp_flags="$EXTRA_KCFLAGS"
1396 EXTRA_KCFLAGS="-Werror"
1397 LB_CHECK_COMPILE([if iov_iter_type exists],
1398 macro_iov_iter_type_exists, [
1399         #include <linux/uio.h>
1400 ],[
1401         struct iov_iter iter = { .type = ITER_KVEC };
1402         enum iter_type type = iov_iter_type(&iter);
1403         (void)type;
1404 ],[
1405         AC_DEFINE(HAVE_IOV_ITER_TYPE, 1,
1406                 [if iov_iter_type exists])
1407 ])
1408 EXTRA_KCFLAGS="$tmp_flags"
1409 ]) # LIBCFS_HAVE_IOV_ITER_TYPE
1410
1411 #
1412 # LIBCFS_GET_REQUEST_KEY_AUTH
1413 #
1414 # kernel 5.0 commit 822ad64d7e46a8e2c8b8a796738d7b657cbb146d
1415 # keys: Fix dependency loop between construction record and auth key
1416 #
1417 # Added <keys/request_key_auth-type.h> and get_request_key_auth()
1418 # which was propagated to stable
1419 #
1420 AC_DEFUN([LIBCFS_GET_REQUEST_KEY_AUTH], [
1421 tmp_flags="$EXTRA_KCFLAGS"
1422 EXTRA_KCFLAGS="-Werror"
1423 LB_CHECK_COMPILE([if get_request_key_auth() is available],
1424 get_request_key_auth_exported, [
1425         #include <linux/key.h>
1426         #include <linux/keyctl.h>
1427         #include <keys/request_key_auth-type.h>
1428 ],[
1429         struct key *ring;
1430         const struct key *key = NULL;
1431         struct request_key_auth *rka = get_request_key_auth(key);
1432
1433         ring = key_get(rka->dest_keyring);
1434 ],[
1435         AC_DEFINE(HAVE_GET_REQUEST_KEY_AUTH, 1,
1436                 [get_request_key_auth() is available])
1437 ])
1438 EXTRA_KCFLAGS="$tmp_flags"
1439 ]) # LIBCFS_GET_REQUEST_KEY_AUTH
1440
1441 #
1442 # LIBCFS_LOOKUP_USER_KEY
1443 #
1444 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1445 # signal: Remove task parameter from force_sig
1446 #
1447 AC_DEFUN([LIBCFS_LOOKUP_USER_KEY], [
1448 tmp_flags="$EXTRA_KCFLAGS"
1449 EXTRA_KCFLAGS="-Werror"
1450 LB_CHECK_COMPILE([if lookup_user_key() is available],
1451 lookup_user_key_exported, [
1452         #include <linux/key.h>
1453         #include <linux/keyctl.h>
1454 ],[
1455         lookup_user_key(KEY_SPEC_USER_KEYRING, 0, 0);
1456 ],[
1457         AC_DEFINE(HAVE_LOOKUP_USER_KEY, 1,
1458                 [lookup_user_key() is available])
1459 ])
1460 EXTRA_KCFLAGS="$tmp_flags"
1461 ]) # LIBCFS_LOOKUP_USER_KEY
1462
1463 #
1464 # LIBCFS_FORCE_SIG_WITH_TASK
1465 #
1466 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1467 # signal: Remove task parameter from force_sig
1468 #
1469 AC_DEFUN([LIBCFS_FORCE_SIG_WITH_TASK], [
1470 tmp_flags="$EXTRA_KCFLAGS"
1471 EXTRA_KCFLAGS="-Werror"
1472 LB_CHECK_COMPILE([if force_sig has task parameter],
1473 force_sig_with_task, [
1474         #include <linux/sched/signal.h>
1475 ],[
1476         force_sig(SIGINT, NULL);
1477 ],[
1478         AC_DEFINE(HAVE_FORCE_SIG_WITH_TASK, 1,
1479                 [force_sig() has task parameter])
1480 ])
1481 EXTRA_KCFLAGS="$tmp_flags"
1482 ]) # LIBCFS_FORCE_SIG_WITH_TASK
1483
1484 #
1485 # LIBCFS_CACHE_DETAIL_WRITERS
1486 #
1487 # kernel v5.3-rc2-1-g64a38e840ce5
1488 # SUNRPC: Track writers of the 'channel' file to improve cache_listeners_exist
1489 #
1490 AC_DEFUN([LIBCFS_CACHE_DETAIL_WRITERS], [
1491 tmp_flags="$EXTRA_KCFLAGS"
1492 EXTRA_KCFLAGS="-Werror"
1493 LB_CHECK_COMPILE([if struct cache_detail has writers],
1494 cache_detail_writers_atomic, [
1495         #include <linux/sunrpc/cache.h>
1496
1497         static struct cache_detail rsi_cache;
1498 ],[
1499         atomic_set(&rsi_cache.writers, 0);
1500 ],[
1501         AC_DEFINE(HAVE_CACHE_DETAIL_WRITERS, 1,
1502                 [struct cache_detail has writers])
1503 ])
1504 EXTRA_KCFLAGS="$tmp_flags"
1505 ]) # LIBCFS_CACHE_DETAIL_WRITERS
1506
1507 #
1508 # LIBCFS_KALLSYMS_LOOKUP
1509 #
1510 # kernel v5.6-11591-g0bd476e6c671
1511 # kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()
1512 AC_DEFUN([LIBCFS_KALLSYMS_LOOKUP], [
1513 LB_CHECK_EXPORT([kallsyms_lookup_name], [kernel/kallsyms.c],
1514         [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1515                 [kallsyms_lookup_name is exported by kernel])])
1516 ]) # LIBCFS_KALLSYMS_LOOKUP
1517
1518 #
1519 # v5.5-8862-gd56c0d45f0e2
1520 # proc: decouple proc from VFS with "struct proc_ops"
1521 #
1522 AC_DEFUN([LIBCFS_SRC_HAVE_PROC_OPS], [
1523         LB2_LINUX_TEST_SRC([proc_ops], [
1524                 #include <linux/proc_fs.h>
1525
1526                 static struct proc_ops *my_proc;
1527         ],[
1528                 my_proc->proc_lseek = NULL;
1529         ],[-Werror])
1530 ]) # LIBCFS_SRC_HAVE_PROC_OPS
1531 AC_DEFUN([LIBCFS_HAVE_PROC_OPS], [
1532         AC_MSG_CHECKING([if struct proc_ops exists])
1533         LB2_LINUX_TEST_RESULT([proc_ops], [
1534                 AC_DEFINE(HAVE_PROC_OPS, 1,
1535                         [struct proc_ops exists])
1536                 AC_MSG_RESULT(yes)
1537         ],[
1538                 AC_MSG_RESULT(no)
1539         ])
1540 ]) # LIBCFS_HAVE_PROC_OPS
1541
1542 #
1543 # LIBCFS_VMALLOC_2ARGS
1544 #
1545 # kernel v5.8-rc1~201^2~19
1546 # mm: remove the pgprot argument to __vmalloc
1547 AC_DEFUN([LIBCFS_VMALLOC_2ARGS], [
1548 LB_CHECK_COMPILE([if __vmalloc has 2 args],
1549 vmalloc_2args, [
1550         #include <linux/vmalloc.h>
1551 ],[
1552         __vmalloc(0, 0);
1553 ],[
1554         AC_DEFINE(HAVE_VMALLOC_2ARGS, 1,
1555                 [__vmalloc only takes 2 args.])
1556 ])
1557 ]) # LIBCFS_VMALLOC_2ARGS
1558
1559 #
1560 # LIBCFS_HAVE_NR_UNSTABLE_NFS
1561 #
1562 # kernel v5.8-rc1~201^2~75
1563 # mm/writeback: discard NR_UNSTABLE_NFS, use NR_WRITEBACK instead
1564 #
1565 AC_DEFUN([LIBCFS_HAVE_NR_UNSTABLE_NFS], [
1566 tmp_flags="$EXTRA_KCFLAGS"
1567 EXTRA_KCFLAGS="-Werror"
1568 LB_CHECK_COMPILE([if NR_UNSTABLE_NFS still in use],
1569 nr_unstable_nfs_exists, [
1570         #include <linux/mm.h>
1571
1572         int i;
1573 ],[
1574         i = NR_UNSTABLE_NFS;
1575 ],[
1576         AC_DEFINE(HAVE_NR_UNSTABLE_NFS, 1,
1577                 [NR_UNSTABLE_NFS is still in use.])
1578 ])
1579 EXTRA_KCFLAGS="$tmp_flags"
1580 ]) # LIBCFS_HAVE_NR_UNSTABLE_NFS
1581
1582 #
1583 # LIBCFS_HAVE_MMAP_LOCK
1584 #
1585 # kernel v5.8-rc1~83^2~24
1586 # mmap locking API: rename mmap_sem to mmap_lock
1587 #
1588 AC_DEFUN([LIBCFS_HAVE_MMAP_LOCK], [
1589 LB_CHECK_COMPILE([if mmap_lock API is available],
1590 mmap_write_lock, [
1591         #include <linux/mm.h>
1592 ],[
1593         mmap_write_lock(NULL);
1594 ],[
1595         AC_DEFINE(HAVE_MMAP_LOCK, 1,
1596                 [mmap_lock API is available.])
1597 ])
1598 ]) # LIBCFS_HAVE_MMAP_LOCK
1599
1600 #
1601 # LIBCFS_KERNEL_SETSOCKOPT
1602 #
1603 # kernel v5.8-rc1~165^2~59^2
1604 # net: remove kernel_setsockopt
1605 AC_DEFUN([LIBCFS_KERNEL_SETSOCKOPT], [
1606 tmp_flags="$EXTRA_KCFLAGS"
1607 EXTRA_KCFLAGS="-Werror"
1608 LB_CHECK_COMPILE([if kernel_setsockopt still in use],
1609 kernel_setsockopt_exists, [
1610         #include <linux/net.h>
1611 ],[
1612         kernel_setsockopt(NULL, 0, 0, NULL, 0);
1613 ],[
1614         AC_DEFINE(HAVE_KERNEL_SETSOCKOPT, 1,
1615                 [kernel_setsockopt still in use])
1616 ])
1617 EXTRA_KCFLAGS="$tmp_flags"
1618 ]) # LIBCFS_KERNEL_SETSOCKOPT
1619
1620 #
1621 # LIBCFS_SEC_RELEASE_SECCTX
1622 #
1623 # kernel linux-hwe-5.8 (5.8.0-22.23~20.04.1)
1624 # LSM: Use lsmcontext in security_release_secctx
1625 AC_DEFUN([LIBCFS_SEC_RELEASE_SECCTX], [
1626 LB_CHECK_COMPILE([if security_release_secctx has 1 arg],
1627 security_release_secctx_1arg, [
1628         #include <linux/security.h>
1629 ],[
1630         security_release_secctx(NULL);
1631 ],[
1632         AC_DEFINE(HAVE_SEC_RELEASE_SECCTX_1ARG, 1,
1633                 [security_release_secctx has 1 arg.])
1634 ])
1635 ]) # LIBCFS_SEC_RELEASE_SECCTX
1636
1637 #
1638 # LIBCFS_HAVE_KFREE_SENSITIVE
1639 #
1640 # kernel v5.10-rc1~3
1641 # mm: remove kzfree() compatibility definition
1642 #
1643 AC_DEFUN([LIBCFS_HAVE_KFREE_SENSITIVE], [
1644 LB_CHECK_COMPILE([if kfree_sensitive() is available],
1645 kfree_sensitive_exists, [
1646         #include <linux/slab.h>
1647
1648 ],[
1649         kfree_sensitive(NULL);
1650 ],[
1651         AC_DEFINE(HAVE_KFREE_SENSITIVE, 1,
1652                 [kfree_sensitive() is available.])
1653 ])
1654 EXTRA_KCFLAGS="$tmp_flags"
1655 ]) # LIBCFS_HAVE_KFREE_SENSITIVE
1656
1657 #
1658 # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
1659 #
1660 # Kernel v5.10-rc1-114-ga24d22b225ce
1661 # crypto: sha - split sha.h into sha1.h and sha2.h
1662 #
1663 AC_DEFUN([LIBCFS_HAVE_CRYPTO_SHA2_HEADER], [
1664 LB_CHECK_LINUX_HEADER([crypto/sha2.h], [
1665         AC_DEFINE(HAVE_CRYPTO_SHA2_HEADER, 1,
1666                 [crypto/sha2.h is present])])
1667 ]) # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
1668
1669 AC_DEFUN([LIBCFS_PROG_LINUX_SRC], [
1670         LIBCFS_SRC_HAVE_PROC_OPS
1671
1672         AC_MSG_CHECKING([for available kernel interfaces to libcfs])
1673         LB2_LINUX_TEST_COMPILE_ALL([libcfs])
1674         AC_MSG_RESULT([done])
1675 ])
1676 AC_DEFUN([LIBCFS_PROG_LINUX_RESULTS], [
1677         # 5.6
1678         LIBCFS_HAVE_PROC_OPS
1679 ])
1680
1681 #
1682 # LIBCFS_PROG_LINUX
1683 #
1684 # LibCFS linux kernel checks
1685 #
1686 AC_DEFUN([LIBCFS_PROG_LINUX], [
1687 AC_MSG_NOTICE([LibCFS kernel checks
1688 ==============================================================================])
1689 LIBCFS_CONFIG_PANIC_DUMPLOG
1690
1691 # 3.11
1692 LIBCFS_KTIME_GET_TS64
1693 # 3.12
1694 LIBCFS_PREPARE_TO_WAIT_EVENT
1695 LIBCFS_KERNEL_PARAM_OPS
1696 LIBCFS_KTIME_ADD
1697 LIBCFS_KTIME_AFTER
1698 LIBCFS_KTIME_BEFORE
1699 LIBCFS_KTIME_COMPARE
1700 LIBCFS_SHRINKER_COUNT
1701 # 3.15
1702 LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
1703 LIBCFS_IOV_ITER_HAS_TYPE
1704 # 3.16
1705 LIBCFS_HAVE_NS_TO_TIMESPEC64
1706 # 3.17
1707 LIBCFS_HLIST_ADD_AFTER
1708 LIBCFS_TIMESPEC64
1709 LIBCFS_KTIME_GET_NS
1710 LIBCFS_KTIME_GET_REAL_TS64
1711 LIBCFS_KTIME_GET_REAL_SECONDS
1712 LIBCFS_KTIME_GET_REAL_NS
1713 LIBCFS_KTIME_TO_TIMESPEC64
1714 LIBCFS_TIMESPEC64_SUB
1715 LIBCFS_TIMESPEC64_TO_KTIME
1716 # 3.19
1717 LIBCFS_KTIME_GET_SECONDS
1718 LIBCFS_WAIT_WOKEN
1719 # 4.0
1720 LIBCFS_KTIME_MS_DELTA
1721 # 4.1
1722 LIBCFS_KERNEL_PARAM_LOCK
1723 # 4.2
1724 LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
1725 # 4.4
1726 LIBCFS_KSTRTOBOOL_FROM_USER
1727 LIBCFS_NETLINK_CALLBACK_START
1728 # 4.5
1729 LIBCFS_CRYPTO_HASH_HELPERS
1730 LIBCFS_EXPORT_KSET_FIND_OBJ
1731 LIBCFS_RHASHTABLE_REPLACE
1732 # 4.6
1733 LIBCFS_BROKEN_HASH_64
1734 LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
1735 LIBCFS_GET_USER_PAGES_6ARG
1736 LIBCFS_STRINGHASH
1737 # 4.7
1738 LIBCFS_RHASHTABLE_INSERT_FAST
1739 LIBCFS_RHASHTABLE_WALK_INIT_3ARG
1740 # 4.8
1741 LIBCFS_RHASHTABLE_LOOKUP
1742 LIBCFS_RHLTABLE
1743 LIBCFS_STACKTRACE_OPS
1744 # 4.9
1745 LIBCFS_GET_USER_PAGES_GUP_FLAGS
1746 LIBCFS_RHASHTABLE_WALK_ENTER
1747 # 4.10
1748 LIBCFS_HOTPLUG_STATE_MACHINE
1749 LIBCFS_REFCOUNT_T
1750 # 4.11
1751 LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
1752 LIBCFS_SCHED_HEADERS
1753 LIBCFS_KREF_READ
1754 LIBCFS_RHT_BUCKET_VAR
1755 # 4.12
1756 LIBCFS_HAVE_PROCESSOR_HEADER
1757 LIBCFS_HAVE_WAIT_BIT_HEADER
1758 LIBCFS_MEMALLOC_NORECLAIM
1759 LIBCFS_NL_EXT_ACK
1760 LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
1761 LIBCFS_CPUS_READ_LOCK
1762 LIBCFS_UUID_T
1763 # 4.13
1764 LIBCFS_NLA_STRDUP
1765 LIBCFS_WAIT_QUEUE_ENTRY
1766 # 4.14
1767 LIBCFS_DEFINE_TIMER
1768 LIBCFS_NEW_KERNEL_WRITE
1769 LIBCFS_NEW_KERNEL_READ
1770 LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1771 # 4.15
1772 LIBCFS_LOCKDEP_IS_HELD
1773 LIBCFS_TIMER_SETUP
1774 # 4.16
1775 LIBCFS_WAIT_VAR_EVENT
1776 # 4.17
1777 LIBCFS_BITMAP_ALLOC
1778 LIBCFS_CLEAR_AND_WAKE_UP_BIT
1779 # 4.18
1780 LIBCFS_TCP_SOCK_SET_NODELAY
1781 LIBCFS_TCP_SOCK_SET_KEEPIDLE
1782 # 4.19
1783 LIBCFS_XARRAY_SUPPORT
1784 LIBCFS_NL_DUMP_EXT_ACK
1785 # 4.20
1786 LIBCFS_HAVE_IOV_ITER_TYPE
1787 # 5.0
1788 LIBCFS_MM_TOTALRAM_PAGES_FUNC
1789 LIBCFS_GET_REQUEST_KEY_AUTH
1790 # 5.3
1791 LIBCFS_LOOKUP_USER_KEY
1792 LIBCFS_FORCE_SIG_WITH_TASK
1793 LIBCFS_CACHE_DETAIL_WRITERS
1794 LIBCFS_HAVE_NR_UNSTABLE_NFS
1795 # 5.7
1796 LIBCFS_KALLSYMS_LOOKUP
1797 LIBCFS_TCP_SOCK_SET_QUICKACK
1798 LIBCFS_TCP_SOCK_SET_KEEPINTVL
1799 LIBCFS_TCP_SOCK_SET_KEEPCNT
1800 # 5.8
1801 LIBCFS_HAVE_MMAP_LOCK
1802 LIBCFS_KERNEL_SETSOCKOPT
1803 LIBCFS_VMALLOC_2ARGS
1804 LIBCFS_SEC_RELEASE_SECCTX
1805 # 5.10
1806 LIBCFS_HAVE_KFREE_SENSITIVE
1807 LIBCFS_HAVE_CRYPTO_SHA2_HEADER
1808 ]) # LIBCFS_PROG_LINUX
1809
1810 #
1811 # LIBCFS_PATH_DEFAULTS
1812 #
1813 # default paths for installed files
1814 #
1815 AC_DEFUN([LIBCFS_PATH_DEFAULTS], [
1816 ]) # LIBCFS_PATH_DEFAULTS
1817
1818 #
1819 # LIBCFS_CONFIGURE
1820 #
1821 # other configure checks
1822 #
1823 AC_DEFUN([LIBCFS_CONFIGURE], [
1824 AC_MSG_NOTICE([LibCFS core checks
1825 ==============================================================================])
1826
1827 # libcfs/libcfs/util/nidstrings.c
1828 AC_CHECK_HEADERS([netdb.h asm/types.h endian.h])
1829 AC_CHECK_FUNCS([gethostbyname])
1830
1831 # --------  Check for required packages  --------------
1832
1833 AC_MSG_NOTICE([LibCFS required packages checks
1834 ==============================================================================])
1835
1836 AC_MSG_CHECKING([whether to enable readline support])
1837 AC_ARG_ENABLE(readline,
1838         AC_HELP_STRING([--disable-readline],
1839                 [disable readline support]),
1840         [], [enable_readline="yes"])
1841 AC_MSG_RESULT([$enable_readline])
1842
1843 LIBREADLINE=""
1844 AS_IF([test "x$enable_readline" = xyes], [
1845         AC_CHECK_LIB([readline], [readline], [
1846                 LIBREADLINE="-lreadline"
1847                 AC_DEFINE(HAVE_LIBREADLINE, 1,
1848                         [readline library is available])
1849         ])
1850 ])
1851 AC_SUBST(LIBREADLINE)
1852
1853 AC_MSG_CHECKING([whether to use libpthread for libcfs library])
1854 AC_ARG_ENABLE([libpthread],
1855         AC_HELP_STRING([--disable-libpthread],
1856                 [disable libpthread]),
1857         [], [enable_libpthread="yes"])
1858 AC_MSG_RESULT([$enable_libpthread])
1859
1860 PTHREAD_LIBS=""
1861 AS_IF([test "x$enable_libpthread" = xyes], [
1862         AC_CHECK_LIB([pthread], [pthread_create], [
1863                 PTHREAD_LIBS="-lpthread"
1864                 AC_DEFINE([HAVE_LIBPTHREAD], 1,
1865                         [use libpthread for libcfs library])
1866         ])
1867 ], [
1868         AC_MSG_WARN([Using libpthread for libcfs library is disabled explicitly])
1869 ])
1870 AC_SUBST(PTHREAD_LIBS)
1871 ]) # LIBCFS_CONFIGURE
1872
1873 #
1874 # LIBCFS_CONFIG_FILES
1875 #
1876 # files that should be generated with AC_OUTPUT
1877 #
1878 AC_DEFUN([LIBCFS_CONFIG_FILES], [
1879 AC_CONFIG_FILES([
1880 libcfs/Makefile
1881 libcfs/autoMakefile
1882 libcfs/autoconf/Makefile
1883 libcfs/include/Makefile
1884 libcfs/include/libcfs/Makefile
1885 libcfs/include/uapi/Makefile
1886 libcfs/include/libcfs/linux/Makefile
1887 libcfs/include/libcfs/util/Makefile
1888 libcfs/include/libcfs/crypto/Makefile
1889 libcfs/include/uapi/linux/Makefile
1890 libcfs/libcfs/Makefile
1891 libcfs/libcfs/autoMakefile
1892 libcfs/libcfs/linux/Makefile
1893 libcfs/libcfs/util/Makefile
1894 libcfs/libcfs/crypto/Makefile
1895 ])
1896 ]) # LIBCFS_CONFIG_FILES