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
  16 AC_MSG_CHECKING([whether to enable ENTRY/EXIT])
  17 AC_ARG_ENABLE([libcfs_trace],
  18         AS_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         AS_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         AS_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_SRC_KTIME_GET_TS64], [
  55         LB2_LINUX_TEST_SRC([ktime_get_ts64], [
  56                 #include <linux/hrtimer.h>
  57                 #include <linux/ktime.h>
  58         ],[
  59                 struct timespec64 *ts = NULL;
  60
  61                 ktime_get_ts64(ts);
  62         ])
  63 ])
  64 AC_DEFUN([LIBCFS_KTIME_GET_TS64], [
  65         AC_MSG_CHECKING([does function 'ktime_get_ts64' exist])
  66         LB2_LINUX_TEST_RESULT([ktime_get_ts64], [
  67                 AC_DEFINE(HAVE_KTIME_GET_TS64, 1,
  68                         ['ktime_get_ts64' is available])
  69         ])
  70 ]) # LIBCFS_KTIME_GET_TS64
  71
  72 #
  73 # Kernel version 3.12-rc4 commit c2d816443ef30 added prepare_to_wait_event()
  74 #
  75 AC_DEFUN([LIBCFS_SRC_PREPARE_TO_WAIT_EVENT],[
  76         LB2_LINUX_TEST_SRC([prepare_to_wait_event], [
  77                 #include <linux/wait.h>
  78         ],[
  79                 prepare_to_wait_event(NULL, NULL, 0);
  80         ])
  81 ])
  82 AC_DEFUN([LIBCFS_PREPARE_TO_WAIT_EVENT],[
  83         AC_MSG_CHECKING([does function 'prepare_to_wait_event' exist])
  84         LB2_LINUX_TEST_RESULT([prepare_to_wait_event], [
  85                 AC_DEFINE(HAVE_PREPARE_TO_WAIT_EVENT, 1,
  86                         ['prepare_to_wait_event' is available])
  87         ])
  88 ]) # LIBCFS_PREPARE_TO_WAIT_EVENT
  89
  90 #
  91 # Linux kernel 3.12 introduced struct kernel_param_ops
  92 # This has been backported to all lustre supported
  93 # clients except RHEL6. We have to handle the differences.
  94 #
  95 AC_DEFUN([LIBCFS_SRC_KERNEL_PARAM_OPS],[
  96         LB2_LINUX_TEST_SRC([kernel_param_ops], [
  97                 #include <linux/module.h>
  98         ],[
  99                 struct kernel_param_ops ops;
 100
 101                 ops.set = NULL;
 102         ])
 103 ])
 104 AC_DEFUN([LIBCFS_KERNEL_PARAM_OPS],[
 105         AC_MSG_CHECKING([does 'struct kernel_param_ops' exist])
 106         LB2_LINUX_TEST_RESULT([kernel_param_ops], [
 107                 AC_DEFINE(HAVE_KERNEL_PARAM_OPS, 1,
 108                         ['struct kernel_param_ops' is available])
 109         ])
 110 ]) # LIBCFS_KERNEL_PARAM_OPS
 111
 112 #
 113 # Kernel version 3.12 introduced ktime_add
 114 #
 115 AC_DEFUN([LIBCFS_SRC_KTIME_ADD],[
 116         LB2_LINUX_TEST_SRC([ktime_add], [
 117                 #include <linux/hrtimer.h>
 118                 #include <linux/ktime.h>
 119         ],[
 120                 ktime_t start = ktime_set(0, 0);
 121                 ktime_t end = start;
 122                 ktime_t total;
 123
 124                 total = ktime_add(start, end);
 125         ])
 126 ])
 127 AC_DEFUN([LIBCFS_KTIME_ADD],[
 128         AC_MSG_CHECKING([does function 'ktime_add' exist])
 129         LB2_LINUX_TEST_RESULT([ktime_add], [
 130                 AC_DEFINE(HAVE_KTIME_ADD, 1, [ktime_add is available])
 131         ])
 132 ]) # LIBCFS_KTIME_ADD
 133
 134 #
 135 # Kernel version 3.12 introduced ktime_after
 136 #
 137 AC_DEFUN([LIBCFS_SRC_KTIME_AFTER],[
 138         LB2_LINUX_TEST_SRC([ktime_after], [
 139                 #include <linux/hrtimer.h>
 140                 #include <linux/ktime.h>
 141         ],[
 142                 ktime_t start = ktime_set(0, 0);
 143                 ktime_t end = start;
 144
 145                 ktime_after(start, end);
 146         ])
 147 ])
 148 AC_DEFUN([LIBCFS_KTIME_AFTER],[
 149         AC_MSG_CHECKING([does function 'ktime_after' exist])
 150         LB2_LINUX_TEST_RESULT([ktime_after], [
 151                 AC_DEFINE(HAVE_KTIME_AFTER, 1, [ktime_after is available])
 152         ])
 153 ]) # LIBCFS_KTIME_AFTER
 154
 155 #
 156 # Kernel version 3.12 introduced ktime_before
 157 # See linux commit 67cb9366ff5f99868100198efba5ca88aaa6ad25
 158 #
 159 AC_DEFUN([LIBCFS_SRC_KTIME_BEFORE],[
 160         LB2_LINUX_TEST_SRC([ktime_before], [
 161                 #include <linux/hrtimer.h>
 162                 #include <linux/ktime.h>
 163         ],[
 164                 ktime_t start = ktime_set(0, 0);
 165                 ktime_t end = start;
 166
 167                 ktime_before(start, end);
 168         ])
 169 ])
 170 AC_DEFUN([LIBCFS_KTIME_BEFORE],[
 171         AC_MSG_CHECKING([does function 'ktime_before' exist])
 172         LB2_LINUX_TEST_RESULT([ktime_before], [
 173                 AC_DEFINE(HAVE_KTIME_BEFORE, 1, [ktime_before is available])
 174         ])
 175 ]) # LIBCFS_KTIME_BEFORE
 176
 177 #
 178 # Kernel version 3.12 introduced ktime_compare
 179 #
 180 AC_DEFUN([LIBCFS_SRC_KTIME_COMPARE],[
 181         LB2_LINUX_TEST_SRC([ktime_compare], [
 182                 #include <linux/hrtimer.h>
 183                 #include <linux/ktime.h>
 184         ],[
 185                 ktime_t start = ktime_set(0, 0);
 186                 ktime_t end = start;
 187
 188                 ktime_compare(start, end);
 189         ])
 190 ])
 191 AC_DEFUN([LIBCFS_KTIME_COMPARE],[
 192         AC_MSG_CHECKING([does function 'ktime_compare' exist])
 193         LB2_LINUX_TEST_RESULT([ktime_compare], [
 194                 AC_DEFINE(HAVE_KTIME_COMPARE, 1,
 195                         [ktime_compare is available])
 196         ])
 197 ]) # LIBCFS_KTIME_COMPARE
 198
 199 #
 200 # FC19 3.12 kernel struct shrinker change
 201 #
 202 AC_DEFUN([LIBCFS_SRC_SHRINKER_COUNT],[
 203         LB2_LINUX_TEST_SRC([shrinker_count_objects], [
 204                 #include <linux/mmzone.h>
 205                 #include <linux/shrinker.h>
 206         ],[
 207                 struct shrinker shrinker;
 208
 209                 shrinker.count_objects = NULL;
 210         ])
 211 ])
 212 AC_DEFUN([LIBCFS_SHRINKER_COUNT],[
 213         AC_MSG_CHECKING([shrinker has 'count_objects'])
 214         LB2_LINUX_TEST_RESULT([shrinker_count_objects], [
 215                 AC_DEFINE(HAVE_SHRINKER_COUNT, 1,
 216                         [shrinker has count_objects member])
 217         ])
 218 ]) # LIBCFS_SHRINKER_COUNT
 219
 220 #
 221 # Kernel version 3.13 commit aace05097a0fd467230e39acb148be0fdaa90068
 222 # add match_wildcard() function.
 223 #
 224 AC_DEFUN([LIBCFS_SRC_MATCH_WILDCARD],[
 225         LB2_LINUX_TEST_SRC([match_wildcard], [
 226                 #include <linux/parser.h>
 227         ],[
 228                 bool match;
 229
 230                 match = match_wildcard(NULL, NULL);
 231         ])
 232 ])
 233 AC_DEFUN([LIBCFS_MATCH_WILDCARD],[
 234         AC_MSG_CHECKING([does function 'match_wildcard' exist])
 235         LB2_LINUX_TEST_RESULT([match_wildcard], [
 236                 AC_DEFINE(HAVE_MATCH_WILDCARD, 1,
 237                         [match_wildcard() is available])
 238         ])
 239 ]) # LIBCFS_MATCH_WILDCARD
 240
 241 #
 242 # LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
 243 #
 244 # v3.14-7405-g91b0abe36a7b added AS_EXITING flag with
 245 # mapping_exiting() and mapping_set_exiting()
 246 #
 247 AC_DEFUN([LIBCFS_SRC_HAVE_MAPPING_AS_EXITING_FLAG], [
 248 m4_pattern_allow([AS_EXITING])
 249         LB2_LINUX_TEST_SRC([mapping_exiting_exists], [
 250                 #include <linux/pagemap.h>
 251         ],[
 252                 enum mapping_flags flag = AS_EXITING;
 253                 (void)flag;
 254         ],[-Werror])
 255 ])
 256 AC_DEFUN([LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG], [
 257         AC_MSG_CHECKING([if enum mapping_flags has AS_EXITING flag])
 258         LB2_LINUX_TEST_RESULT([mapping_exiting_exists], [
 259                 AC_DEFINE(HAVE_MAPPING_AS_EXITING_FLAG, 1,
 260                         [enum mapping_flags has AS_EXITING flag])
 261         ])
 262 ]) # LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
 263
 264 #
 265 # LIBCFS_IOV_ITER_HAS_TYPE
 266 #
 267 # kernel 3.15-rc4 commit 71d8e532b1549a478e6a6a8a44f309d050294d00
 268 # start adding the tag to iov_iter
 269 #
 270 AC_DEFUN([LIBCFS_SRC_IOV_ITER_HAS_TYPE], [
 271         LB2_LINUX_TEST_SRC([iov_iter_has_type_member], [
 272                 #include <linux/uio.h>
 273         ],[
 274                 struct iov_iter iter = { .type = ITER_KVEC };
 275                 (void)iter;
 276         ],
 277         [-Werror])
 278 ])
 279 AC_DEFUN([LIBCFS_IOV_ITER_HAS_TYPE], [
 280         AC_MSG_CHECKING([if iov_iter has member type])
 281         LB2_LINUX_TEST_RESULT([iov_iter_has_type_member], [
 282                 AC_DEFINE(HAVE_IOV_ITER_HAS_TYPE_MEMBER, 1,
 283                         [if iov_iter has member type])
 284         ])
 285 ]) # LIBCFS_IOV_ITER_HAS_TYPE
 286
 287 #
 288 # LIBCFS_HAVE_NS_TO_TIMESPEC64
 289 #
 290 # Kernel version 3.16-rc3 commit a84d1169164b274f13b97a23ff235c000efe3b49
 291 # introduced struct __kernel_old_timeval
 292 #
 293 AC_DEFUN([LIBCFS_SRC_HAVE_NS_TO_TIMESPEC64],[
 294         LB2_LINUX_TEST_SRC([kernel_old_timeval], [
 295                 #include <linux/time.h>
 296         ],[
 297                 struct timespec64 kts;
 298
 299                 kts = ns_to_timespec64(0);
 300         ])
 301 ])
 302 AC_DEFUN([LIBCFS_HAVE_NS_TO_TIMESPEC64],[
 303         AC_MSG_CHECKING([does 'ns_to_timespec64()' exist])
 304         LB2_LINUX_TEST_RESULT([kernel_old_timeval], [
 305                 AC_DEFINE(HAVE_NS_TO_TIMESPEC64, 1,
 306                         [ns_to_timespec64() is available])
 307         ])
 308 ]) # LIBCFS_HAVE_NS_TO_TIMESPEC64
 309
 310 #
 311 # LIBCFS_HAVE_GLOB
 312 #
 313 # Kernel version 3.16 commit b01250856b25f4417c51aa33afc451fbf7da1484
 314 # added glob support to the Linux kernel
 315 #
 316 AC_DEFUN([LIBCFS_SRC_HAVE_GLOB],[
 317         LB2_LINUX_TEST_SRC([glob_match], [
 318                 #include <linux/glob.h>
 319         ],[
 320                 return glob_match(NULL, NULL);
 321         ],[-Werror])
 322 ])
 323 AC_DEFUN([LIBCFS_HAVE_GLOB],[
 324         AC_MSG_CHECKING([does 'glob_match()' exist])
 325         LB2_LINUX_TEST_RESULT([glob_match], [
 326                 AC_DEFINE(HAVE_GLOB, 1,
 327                         [glob_match() is available])
 328         ])
 329 ]) # LIBCFS_HAVE_GLOB
 330
 331 #
 332 # Kernel version 3.17 changed hlist_add_after to
 333 # hlist_add_behind
 334 #
 335 AC_DEFUN([LIBCFS_SRC_HLIST_ADD_AFTER],[
 336         LB2_LINUX_TEST_SRC([hlist_add_after], [
 337                 #include <linux/list.h>
 338         ],[
 339                 hlist_add_after(NULL, NULL);
 340         ])
 341 ])
 342 AC_DEFUN([LIBCFS_HLIST_ADD_AFTER],[
 343         AC_MSG_CHECKING([does function 'hlist_add_after' exist])
 344         LB2_LINUX_TEST_RESULT([hlist_add_after], [
 345                 AC_DEFINE(HAVE_HLIST_ADD_AFTER, 1,
 346                         [hlist_add_after is available])
 347         ])
 348 ]) # LIBCFS_HLIST_ADD_AFTER
 349
 350 #
 351 # Kernel version 3.17 introduced struct timespec64
 352 #
 353 AC_DEFUN([LIBCFS_SRC_TIMESPEC64],[
 354         LB2_LINUX_TEST_SRC([timespec64], [
 355                 #include <linux/time.h>
 356         ],[
 357                 struct timespec64 ts;
 358
 359                 ts.tv_sec = 0;
 360                 ts.tv_nsec = 0;
 361         ])
 362 ])
 363 AC_DEFUN([LIBCFS_TIMESPEC64],[
 364         AC_MSG_CHECKING([does 'struct timespec64' exist])
 365         LB2_LINUX_TEST_RESULT([timespec64], [
 366                 AC_DEFINE(HAVE_TIMESPEC64, 1,
 367                         ['struct timespec64' is available])
 368         ])
 369 ]) # LIBCFS_TIMESPEC64
 370
 371 #
 372 # Kernel version 3.17 introduced ktime_get_real_ts64
 373 #
 374 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_TS64],[
 375         LB2_LINUX_TEST_SRC([ktime_get_real_ts64], [
 376                 #include <linux/ktime.h>
 377         ],[
 378                 struct timespec64 *ts = NULL;
 379
 380                 ktime_get_real_ts64(ts);
 381         ])
 382 ])
 383 AC_DEFUN([LIBCFS_KTIME_GET_REAL_TS64],[
 384         AC_MSG_CHECKING([does function 'ktime_get_real_ts64' exist])
 385         LB2_LINUX_TEST_RESULT([ktime_get_real_ts64], [
 386                 AC_DEFINE(HAVE_KTIME_GET_REAL_TS64, 1,
 387                         ['ktime_get_real_ts64' is available])
 388         ])
 389 ]) # LIBCFS_KTIME_GET_REAL_TS64
 390
 391 #
 392 # Kernel version 3.17 introduced ktime_get_real_seconds
 393 #
 394 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_SECONDS],[
 395         LB2_LINUX_TEST_SRC([ktime_get_real_seconds], [
 396                 #include <linux/hrtimer.h>
 397                 #include <linux/ktime.h>
 398         ],[
 399                 time64_t now;
 400
 401                 now = ktime_get_real_seconds();
 402         ])
 403 ])
 404 AC_DEFUN([LIBCFS_KTIME_GET_REAL_SECONDS],[
 405         AC_MSG_CHECKING([does function 'ktime_get_real_ts64' exist])
 406         LB2_LINUX_TEST_RESULT([ktime_get_real_seconds], [
 407                 AC_DEFINE(HAVE_KTIME_GET_REAL_SECONDS, 1,
 408                         ['ktime_get_real_seconds' is available])
 409         ])
 410 ]) # LIBCFS_KTIME_GET_REAL_SECONDS
 411
 412 #
 413 # Kernel version 3.17 created ktime_get_ns wrapper
 414 #
 415 AC_DEFUN([LIBCFS_SRC_KTIME_GET_NS],[
 416         LB2_LINUX_TEST_SRC([ktime_get_ns], [
 417                 #include <linux/hrtimer.h>
 418                 #include <linux/ktime.h>
 419         ],[
 420                 u64 nanoseconds;
 421
 422                 nanoseconds = ktime_get_ns();
 423         ])
 424 ])
 425 AC_DEFUN([LIBCFS_KTIME_GET_NS],[
 426         AC_MSG_CHECKING([does function 'ktime_get_ns' exist])
 427         LB2_LINUX_TEST_RESULT([ktime_get_ns], [],[
 428                 AC_DEFINE(NEED_KTIME_GET_NS, 1,
 429                         ['ktime_get_ns' is not available])
 430         ])
 431 ]) # LIBCFS_KTIME_GET_NS
 432
 433 #
 434 # Kernel version 3.17 created ktime_get_real_ns wrapper
 435 #
 436 AC_DEFUN([LIBCFS_SRC_KTIME_GET_REAL_NS],[
 437         LB2_LINUX_TEST_SRC([ktime_get_real_ns], [
 438                 #include <linux/hrtimer.h>
 439                 #include <linux/ktime.h>
 440         ],[
 441                 u64 nanoseconds;
 442
 443                 nanoseconds = ktime_get_real_ns();
 444         ])
 445 ])
 446 AC_DEFUN([LIBCFS_KTIME_GET_REAL_NS],[
 447         AC_MSG_CHECKING([does function 'ktime_get_real_ns' exist])
 448         LB2_LINUX_TEST_RESULT([ktime_get_real_ns], [],[
 449                 AC_DEFINE(NEED_KTIME_GET_REAL_NS, 1,
 450                         ['ktime_get_real_ns' is not available])
 451         ])
 452 ]) # LIBCFS_KTIME_GET_REAL_NS
 453
 454 #
 455 # Kernel version 3.17 introduced ktime_to_timespec64
 456 #
 457 AC_DEFUN([LIBCFS_SRC_KTIME_TO_TIMESPEC64],[
 458         LB2_LINUX_TEST_SRC([ktime_to_timespec64], [
 459                 #include <linux/hrtimer.h>
 460                 #include <linux/ktime.h>
 461         ],[
 462                 ktime_t now = ktime_set(0, 0);
 463                 struct timespec64 ts;
 464
 465                 ts = ktime_to_timespec64(now);
 466         ])
 467 ])
 468 AC_DEFUN([LIBCFS_KTIME_TO_TIMESPEC64],[
 469         AC_MSG_CHECKING([does function 'ktime_to_timespec64' exist])
 470         LB2_LINUX_TEST_RESULT([ktime_to_timespec64], [
 471                 AC_DEFINE(HAVE_KTIME_TO_TIMESPEC64, 1,
 472                         ['ktime_to_timespec64' is available])
 473         ])
 474 ]) # LIBCFS_KTIME_TO_TIMESPEC64
 475
 476 #
 477 # Kernel version 3.17 introduced timespec64_sub
 478 #
 479 AC_DEFUN([LIBCFS_SRC_TIMESPEC64_SUB],[
 480         LB2_LINUX_TEST_SRC([timespec64_sub], [
 481                 #include <linux/time.h>
 482         ],[
 483                 struct timespec64 later = { }, earlier = { }, diff;
 484
 485                 diff = timespec64_sub(later, earlier);
 486         ])
 487 ])
 488 AC_DEFUN([LIBCFS_TIMESPEC64_SUB],[
 489         AC_MSG_CHECKING([does function 'timespec64_sub' exist])
 490         LB2_LINUX_TEST_RESULT([timespec64_sub], [
 491                 AC_DEFINE(HAVE_TIMESPEC64_SUB, 1,
 492                         ['timespec64_sub' is available])
 493         ])
 494 ]) # LIBCFS_TIMESPEC64_SUB
 495
 496 #
 497 # Kernel version 3.17 introduced timespec64_to_ktime
 498 #
 499 AC_DEFUN([LIBCFS_SRC_TIMESPEC64_TO_KTIME],[
 500         LB2_LINUX_TEST_SRC([timespec64_to_ktime], [
 501         #include <linux/ktime.h>
 502         ],[
 503                 struct timespec64 ts;
 504                 ktime_t now;
 505
 506                 now = timespec64_to_ktime(ts);
 507         ])
 508 ])
 509 AC_DEFUN([LIBCFS_TIMESPEC64_TO_KTIME],[
 510         AC_MSG_CHECKING([does function 'timespec64_to_ktime' exist])
 511         LB2_LINUX_TEST_RESULT([timespec64_to_ktime], [
 512                 AC_DEFINE(HAVE_TIMESPEC64_TO_KTIME, 1,
 513                         ['timespec64_to_ktime' is available])
 514         ])
 515 ]) # LIBCFS_TIMESPEC64_TO_KTIME
 516
 517 #
 518 # Kernel version 3.19 introduced ktime_get_seconds
 519 #
 520 AC_DEFUN([LIBCFS_SRC_KTIME_GET_SECONDS],[
 521         LB2_LINUX_TEST_SRC([ktime_get_seconds], [
 522                 #include <linux/ktime.h>
 523         ],[
 524                 time64_t now;
 525
 526                 now = ktime_get_seconds();
 527         ])
 528 ])
 529 AC_DEFUN([LIBCFS_KTIME_GET_SECONDS],[
 530         AC_MSG_CHECKING([does function 'ktime_get_seconds' exist])
 531         LB2_LINUX_TEST_RESULT([ktime_get_seconds], [
 532                 AC_DEFINE(HAVE_KTIME_GET_SECONDS, 1,
 533                         ['ktime_get_seconds' is available])
 534         ])
 535 ]) # LIBCFS_KTIME_GET_SECONDS
 536
 537 #
 538 # Kernel version 3.19 commit v3.18-rc2-26-g61ada528dea0
 539 # introduce wait_woken()
 540 #
 541 AC_DEFUN([LIBCFS_SRC_WAIT_WOKEN],[
 542         LB2_LINUX_TEST_SRC([wait_woken], [
 543                 #include <linux/wait.h>
 544         ],[
 545                 wait_woken(NULL, 0, 0);
 546         ])
 547 ])
 548 AC_DEFUN([LIBCFS_WAIT_WOKEN],[
 549         AC_MSG_CHECKING([does function 'wait_woken' exist])
 550         LB2_LINUX_TEST_RESULT([wait_woken], [
 551                 AC_DEFINE(HAVE_WAIT_WOKEN, 1,
 552                         ['wait_woken, is available'])
 553         ])
 554 ]) # LIBCFS_WAIT_WOKEN
 555
 556 #
 557 # Kernel version 4.0 commit 41fbf3b39d5eca01527338b4d0ee15ee1ae1023c
 558 # introduced the helper function ktime_ms_delta.
 559 #
 560 AC_DEFUN([LIBCFS_SRC_KTIME_MS_DELTA],[
 561         LB2_LINUX_TEST_SRC([ktime_ms_delta], [
 562                 #include <linux/ktime.h>
 563         ],[
 564                 ktime_t start = ktime_set(0, 0);
 565                 ktime_t end = start;
 566
 567                 ktime_ms_delta(start, end);
 568         ])
 569 ])
 570 AC_DEFUN([LIBCFS_KTIME_MS_DELTA],[
 571         AC_MSG_CHECKING([does function 'ktime_ms_delta' exist])
 572         LB2_LINUX_TEST_RESULT([ktime_ms_delta], [
 573                 AC_DEFINE(HAVE_KTIME_MS_DELTA, 1,
 574                         ['ktime_ms_delta' is available])
 575         ])
 576 ]) # LIBCFS_KTIME_MS_DELTA
 577
 578 #
 579 # Kernel version 4.1 commit b51d23e4e9fea6f264d39535c2a62d1f51e7ccc3
 580 # create per module locks which added kernel_param_[un]lock(). Older
 581 # kernels you have to use __kernel_param_[un]lock(). In that case its
 582 # a global lock for all modules but that is okay since its a rare event.
 583 #
 584 AC_DEFUN([LIBCFS_SRC_KERNEL_PARAM_LOCK],[
 585         LB2_LINUX_TEST_SRC([kernel_param_lock], [
 586                 #include <linux/moduleparam.h>
 587         ],[
 588                 kernel_param_lock(NULL);
 589                 kernel_param_unlock(NULL);
 590         ])
 591 ])
 592 AC_DEFUN([LIBCFS_KERNEL_PARAM_LOCK],[
 593         AC_MSG_CHECKING([does function 'kernel_param_[un]lock' exist])
 594         LB2_LINUX_TEST_RESULT([kernel_param_lock], [
 595                 AC_DEFINE(HAVE_KERNEL_PARAM_LOCK, 1,
 596                         ['kernel_param_[un]lock' is available])
 597         ])
 598 ]) # LIBCFS_KERNEL_PARAM_LOCK
 599
 600 #
 601 # LIBCFS_STRSCPY_EXISTS
 602 #
 603 # Linux commit v4.2-rc1-2-g30035e45753b
 604 #  string: provide strscpy()
 605 #
 606 # If strscpy exists, prefer it over strlcpy
 607 #
 608 AC_DEFUN([LIBCFS_SRC_STRSCPY_EXISTS], [
 609         LB2_LINUX_TEST_SRC([strscpy_exists], [
 610                 #include <linux/string.h>
 611         ],[
 612                 strscpy((char *)NULL, (const char *)NULL, 0);
 613         ],[-Werror])
 614 ])
 615 AC_DEFUN([LIBCFS_STRSCPY_EXISTS], [
 616         AC_MSG_CHECKING([if kernel strscpy is available])
 617         LB2_LINUX_TEST_RESULT([strscpy_exists], [
 618                 AC_DEFINE(HAVE_STRSCPY, 1,
 619                         [kernel strscpy is available])
 620         ])
 621 ]) # LIBCFS_STRSCPY_EXISTS
 622
 623 #
 624 # Kernel version 4.2 changed topology_thread_cpumask
 625 # to topology_sibling_cpumask
 626 #
 627 AC_DEFUN([LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 628         LB2_LINUX_TEST_SRC([topology_sibling_cpumask], [
 629                 #include <linux/topology.h>
 630         ],[
 631                 const struct cpumask *mask;
 632
 633                 mask = topology_sibling_cpumask(0);
 634         ])
 635 ])
 636 AC_DEFUN([LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
 637         AC_MSG_CHECKING([does function 'topology_sibling_cpumask' exist])
 638         LB2_LINUX_TEST_RESULT([topology_sibling_cpumask], [
 639                 AC_DEFINE(HAVE_TOPOLOGY_SIBLING_CPUMASK, 1,
 640                         [topology_sibling_cpumask is available])
 641         ])
 642 ]) # LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
 643
 644 #
 645 # Kernel version 4.4 commit ef951599074ba4fad2d0efa0a977129b41e6d203
 646 # introduced kstrtobool and kstrtobool_from_user.
 647 #
 648 AC_DEFUN([LIBCFS_SRC_KSTRTOBOOL_FROM_USER], [
 649         LB2_LINUX_TEST_SRC([kstrtobool_from_user], [
 650                 #include <linux/kernel.h>
 651         ],[
 652                 bool result;
 653                 return kstrtobool_from_user(NULL, 0, &result);
 654         ])
 655 ])
 656 AC_DEFUN([LIBCFS_KSTRTOBOOL_FROM_USER], [
 657         AC_MSG_CHECKING([if Linux kernel has 'kstrtobool_from_user'])
 658         LB2_LINUX_TEST_RESULT([kstrtobool_from_user], [
 659                 AC_DEFINE(HAVE_KSTRTOBOOL_FROM_USER, 1,
 660                         [kernel has kstrtobool_from_user])
 661         ])
 662 ]) # LIBCFS_KSTRTOBOOL_FROM_USER
 663
 664 #
 665 # LIBCFS_NETLINK_CALLBACK_START
 666 #
 667 # Kernel version 4.4-rc3 commit fc9e50f5a5a4e1fa9ba2756f745a13e693cf6a06
 668 # added a start function callback for struct netlink_callback
 669 #
 670 AC_DEFUN([LIBCFS_SRC_NETLINK_CALLBACK_START], [
 671         LB2_LINUX_TEST_SRC([cb_start], [
 672                 #include <net/genetlink.h>
 673         ],[
 674                 struct genl_ops ops;
 675
 676                 ops.start = NULL;
 677         ],[])
 678 ])
 679 AC_DEFUN([LIBCFS_NETLINK_CALLBACK_START], [
 680         AC_MSG_CHECKING([if struct genl_ops has start callback])
 681         LB2_LINUX_TEST_RESULT([cb_start], [
 682                 AC_DEFINE(HAVE_NETLINK_CALLBACK_START, 1,
 683                         [struct genl_ops has 'start' callback])
 684         ])
 685 ]) # LIBCFS_NETLINK_CALLBACK_START
 686
 687 #
 688 # Kernel version 4.5-rc1 commit d12481bc58fba89427565f8592e88446ec084a24
 689 # added crypto hash helpers
 690 #
 691 AC_DEFUN([LIBCFS_SRC_CRYPTO_HASH_HELPERS], [
 692         LB2_LINUX_TEST_SRC([crypto_hash_helpers], [
 693                 #include <crypto/hash.h>
 694         ],[
 695                 crypto_ahash_alg_name(NULL);
 696                 crypto_ahash_driver_name(NULL);
 697         ])
 698 ])
 699 AC_DEFUN([LIBCFS_CRYPTO_HASH_HELPERS], [
 700         AC_MSG_CHECKING([does crypto hash helper functions exist])
 701         LB2_LINUX_TEST_RESULT([crypto_hash_helpers], [
 702                 AC_DEFINE(HAVE_CRYPTO_HASH_HELPERS, 1,
 703                         [crypto hash helper functions are available])
 704         ])
 705 ]) # LIBCFS_CRYPTO_HASH_HELPERS
 706
 707 #
 708 # Kernel version 4.5-rc1 commit 3502cad73c4bbf8f6365d539e814159275252c59
 709 # introduced rhashtable_replace_fast
 710 #
 711 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_REPLACE], [
 712         LB2_LINUX_TEST_SRC([rhashtable_replace_fast], [
 713                 #include <linux/rhashtable.h>
 714         ],[
 715                 const struct rhashtable_params params = { 0 };
 716
 717                 rhashtable_replace_fast(NULL, NULL, NULL, params);
 718         ])
 719 ])
 720 AC_DEFUN([LIBCFS_RHASHTABLE_REPLACE], [
 721         AC_MSG_CHECKING([if 'rhashtable_replace_fast' exists])
 722         LB2_LINUX_TEST_RESULT([rhashtable_replace_fast], [
 723                 AC_DEFINE(HAVE_RHASHTABLE_REPLACE, 1,
 724                         [rhashtable_replace_fast() is available])
 725         ])
 726 ]) # LIBCFS_RHASHTABLE_REPLACE
 727
 728 #
 729 # Kernel version 4.5-rc3 commit 2fe829aca9d7bed5fd6b49c6a1452e5e486b6cc3dd
 730 # made kset_find_obj() exportable to modules
 731 #
 732 AC_DEFUN([LIBCFS_EXPORT_KSET_FIND_OBJ], [
 733 LB_CHECK_EXPORT([kset_find_obj], [lib/kobject.c],
 734         [AC_DEFINE(HAVE_KSET_FIND_OBJ, 1,
 735                 [kset_find_obj is exported by the kernel])])
 736 ]) # LIBCFS_EXPORT_KSET_FIND_OBJ
 737
 738 #
 739 # Kernel version 4.6+ commit ef703f49a6c5b909a85149bb6625c4ed0d697186
 740 # fixed the brokenness of hash_64(). The fix removed GOLDEN_RATIO_PRIME_64
 741 # since it was a poor prime value.
 742 #
 743 AC_DEFUN([LIBCFS_SRC_BROKEN_HASH_64], [
 744         LB2_LINUX_TEST_SRC([broken_hash_64], [
 745         #include <linux/hash.h>
 746         ],[
 747                 int tmp = GOLDEN_RATIO_PRIME_64;
 748         ])
 749 ])
 750 AC_DEFUN([LIBCFS_BROKEN_HASH_64], [
 751         AC_MSG_CHECKING([kernel has fixed hash_64()])
 752         LB2_LINUX_TEST_RESULT([broken_hash_64], [
 753                 AC_DEFINE(HAVE_BROKEN_HASH_64, 1, [kernel hash_64() is broken])
 754         ])
 755 ]) # LIBCFS_BROKEN_HASH_64
 756
 757 #
 758 # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 759 #
 760 # linux 4.6 kernel changed stacktrace_ops address to return an int
 761 #
 762 AC_DEFUN([LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 763         LB2_LINUX_TEST_SRC([stacktrace_ops_address_return_int], [
 764                 #include <asm/stacktrace.h>
 765         ],[
 766                 int rc;
 767
 768                 rc = ((struct stacktrace_ops *)0)->address(NULL, 0, 0);
 769         ])
 770 ])
 771 AC_DEFUN([LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
 772         AC_MSG_CHECKING([if 'struct stacktrace_ops' address function returns an int])
 773         LB2_LINUX_TEST_RESULT([stacktrace_ops_address_return_int], [
 774                 AC_DEFINE(STACKTRACE_OPS_ADDRESS_RETURN_INT, 1,
 775                         ['struct stacktrace_ops' address function returns an int])
 776         ])
 777 ]) # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 778
 779 #
 780 # Kernel version 4.6 removed both struct task_struct and struct mm_struct
 781 # arguments to get_user_pages
 782 #
 783 AC_DEFUN([LIBCFS_SRC_GET_USER_PAGES_6ARG], [
 784         LB2_LINUX_TEST_SRC([get_user_pages_6arg], [
 785                 #include <linux/mm.h>
 786         ],[
 787                 int rc;
 788
 789                 rc = get_user_pages(0, 0, 0, 0, NULL, NULL);
 790         ])
 791 ])
 792 AC_DEFUN([LIBCFS_GET_USER_PAGES_6ARG], [
 793         AC_MSG_CHECKING([if 'get_user_pages()' takes 6 arguments])
 794         LB2_LINUX_TEST_RESULT([get_user_pages_6arg], [
 795                 AC_DEFINE(HAVE_GET_USER_PAGES_6ARG, 1,
 796                         [get_user_pages takes 6 arguments])
 797         ])
 798 ]) # LIBCFS_GET_USER_PAGES_6ARG
 799
 800 #
 801 # LIBCFS_STRINGHASH
 802 #
 803 # 4.6 kernel created stringhash.h which moved stuff out of dcache.h
 804 # commit f4bcbe792b8f434e32487cff9d9e30ab45a3ce02
 805 #
 806 AC_DEFUN([LIBCFS_STRINGHASH], [
 807 LB_CHECK_LINUX_HEADER([linux/stringhash.h], [
 808         AC_DEFINE(HAVE_STRINGHASH, 1,
 809                 [stringhash.h is present])])
 810 ]) # LIBCFS_STRINGHASH
 811
 812 #
 813 # LIBCFS_RHASHTABLE_INSERT_FAST
 814 #
 815 # 4.7+ kernel commit 5ca8cc5bf11faed257c762018aea9106d529232f
 816 # changed __rhashtable_insert_fast to support the new function
 817 # rhashtable_lookup_get_insert_key().
 818 #
 819 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_INSERT_FAST], [
 820         LB2_LINUX_TEST_SRC([rhashtable_insert_fast], [
 821                 #include <linux/rhashtable.h>
 822         ],[
 823                 const struct rhashtable_params params = { 0 };
 824                 int rc;
 825
 826                 rc = __rhashtable_insert_fast(NULL, NULL, NULL, params);
 827         ],
 828         [-Werror])
 829 ])
 830 AC_DEFUN([LIBCFS_RHASHTABLE_INSERT_FAST], [
 831         AC_MSG_CHECKING([if internal '__rhashtable_insert_fast()' returns int])
 832         LB2_LINUX_TEST_RESULT([rhashtable_insert_fast], [
 833                 AC_DEFINE(HAVE_HASHTABLE_INSERT_FAST_RETURN_INT, 1,
 834                           ['__rhashtable_insert_fast()' returns int])
 835         ])
 836 ]) # LIBCFS_RHASHTABLE_INSERT_FAST
 837
 838 #
 839 # Kernel version 4.7-rc1 commit 8f6fd83c6c5ec66a4a70c728535ddcdfef4f3697
 840 # added 3rd arg to rhashtable_walk_init
 841 #
 842 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG], [
 843         LB2_LINUX_TEST_SRC([rhashtable_walk_init], [
 844                 #include <linux/gfp.h>
 845                 #include <linux/rhashtable.h>
 846         ],[
 847                 rhashtable_walk_init(NULL, NULL, GFP_KERNEL);
 848         ])
 849 ])
 850 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_INIT_3ARG], [
 851         AC_MSG_CHECKING([if 'rhashtable_walk_init' has 3 args])
 852         LB2_LINUX_TEST_RESULT([rhashtable_walk_init], [
 853                 AC_DEFINE(HAVE_3ARG_RHASHTABLE_WALK_INIT, 1,
 854                         [rhashtable_walk_init() has 3 args])
 855         ])
 856 ]) # LIBCFS_RHASHTABLE_WALK_INIT_3ARG
 857
 858 #
 859 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 860 # introduced rhashtable_lookup
 861 #
 862 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_LOOKUP], [
 863         LB2_LINUX_TEST_SRC([rhashtable_lookup], [
 864                 #include <linux/rhashtable.h>
 865         ],[
 866                 const struct rhashtable_params params = { 0 };
 867                 void *ret;
 868
 869                 ret = rhashtable_lookup(NULL, NULL, params);
 870         ])
 871 ])
 872 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP], [
 873         AC_MSG_CHECKING([if 'rhashtable_lookup' exist])
 874         LB2_LINUX_TEST_RESULT([rhashtable_lookup], [
 875                 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP, 1,
 876                         [rhashtable_lookup() is available])
 877         ])
 878 ]) # LIBCFS_RHASHTABLE_LOOKUP
 879
 880 #
 881 # LIBCFS_RHLTABLE
 882 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
 883 # created the rhlist interface to allow inserting duplicate objects
 884 # into the same table.
 885 #
 886 AC_DEFUN([LIBCFS_SRC_RHLTABLE], [
 887         LB2_LINUX_TEST_SRC([rhtable], [
 888                 #include <linux/rhashtable.h>
 889         ],[
 890                 struct rhltable *hlt = NULL;
 891
 892                 rhltable_destroy(hlt);
 893         ])
 894 ])
 895 AC_DEFUN([LIBCFS_RHLTABLE], [
 896         AC_MSG_CHECKING([does 'struct rhltable' exist])
 897         LB2_LINUX_TEST_RESULT([rhtable], [
 898                 AC_DEFINE(HAVE_RHLTABLE, 1, [struct rhltable exist])
 899         ])
 900 ]) # LIBCFS_RHLTABLE
 901
 902 #
 903 # LIBCFS_STACKTRACE_OPS
 904 #
 905 # Kernel version 4.8 commit c8fe4609827aedc9c4b45de80e7cdc8ccfa8541b
 906 # removed both struct stacktrace_ops and dump_trace() function
 907 #
 908 AC_DEFUN([LIBCFS_SRC_STACKTRACE_OPS], [
 909         LB2_LINUX_TEST_SRC([stacktrace_ops], [
 910                 struct task_struct;
 911                 struct pt_regs;
 912                 #include <asm/stacktrace.h>
 913         ],[
 914                 struct stacktrace_ops ops;
 915                 ops.stack = NULL;
 916         ])
 917 ])
 918 AC_DEFUN([LIBCFS_STACKTRACE_OPS], [
 919 AC_MSG_CHECKING([if 'struct stacktrace_ops' exists])
 920         LB2_LINUX_TEST_RESULT([stacktrace_ops], [
 921                 AC_DEFINE(HAVE_STACKTRACE_OPS, 1,
 922                         [struct stacktrace_ops exists])
 923         ])
 924 ]) # LIBCFS_STACKTRACE_OPS
 925
 926 #
 927 # LIBCFS_RHASHTABLE_WALK_ENTER
 928 #
 929 # Kernel version 4.9-rc1 commit 246779dd090bd1b74d2652b3a6ca7759f593b27a
 930 # introduced rhashtable_walk_enter
 931 #
 932 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_WALK_ENTER], [
 933         LB2_LINUX_TEST_SRC([rhashtable_walk_enter], [
 934                 #include <linux/rhashtable.h>
 935         ],[
 936                 rhashtable_walk_enter(NULL, NULL);
 937         ])
 938 ])
 939 AC_DEFUN([LIBCFS_RHASHTABLE_WALK_ENTER], [
 940         AC_MSG_CHECKING([if 'rhashtable_walk_enter' exists])
 941         LB2_LINUX_TEST_RESULT([rhashtable_walk_enter], [
 942                 AC_DEFINE(HAVE_RHASHTABLE_WALK_ENTER, 1,
 943                         [rhashtable_walk_enter() is available])
 944         ])
 945 ]) # LIBCFS_RHASHTABLE_WALK_ENTER
 946
 947 #
 948 # Kernel version 4.9 commit 768ae309a96103ed02eb1e111e838c87854d8b51
 949 # mm: replace get_user_pages() write/force parameters with gup_flags
 950 #
 951 AC_DEFUN([LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS], [
 952         LB2_LINUX_TEST_SRC([get_user_pages_gup_flags], [
 953                 #include <linux/mm.h>
 954         ],[
 955                 int rc;
 956                 rc = get_user_pages(0, 0, FOLL_WRITE, NULL, NULL);
 957         ])
 958 ])
 959 AC_DEFUN([LIBCFS_GET_USER_PAGES_GUP_FLAGS], [
 960         AC_MSG_CHECKING([if 'get_user_pages()' takes gup_flags in arguments])
 961         LB2_LINUX_TEST_RESULT([get_user_pages_gup_flags], [
 962                 AC_DEFINE(HAVE_GET_USER_PAGES_GUP_FLAGS, 1,
 963                         [get_user_pages takes gup_flags in arguments])
 964                 ])
 965 ]) # LIBCFS_GET_USER_PAGES_GUP_FLAGS
 966
 967 #
 968 # Kernel version 4.10 commit 7b737965b33188bd3dbb44e938535c4006d97fbb
 969 # libcfs: Convert to hotplug state machine
 970 #
 971 AC_DEFUN([LIBCFS_SRC_HOTPLUG_STATE_MACHINE], [
 972         LB2_LINUX_TEST_SRC([cpu_hotplug_state_machine], [
 973                 #include <linux/cpuhotplug.h>
 974         ],[
 975                 cpuhp_remove_state(CPUHP_LUSTRE_CFS_DEAD);
 976         ])
 977 ])
 978 AC_DEFUN([LIBCFS_HOTPLUG_STATE_MACHINE], [
 979         AC_MSG_CHECKING([if libcfs supports CPU hotplug state machine])
 980         LB2_LINUX_TEST_RESULT([cpu_hotplug_state_machine], [
 981                 AC_DEFINE(HAVE_HOTPLUG_STATE_MACHINE, 1,
 982                         [hotplug state machine is supported])
 983         ])
 984 ]) # LIBCFS_HOTPLUG_STATE_MACHINE
 985
 986 #
 987 # Kernel version 4.10-rc3 commit f405df5de3170c00e5c54f8b7cf4766044a032ba
 988 # introduced refcount_t which is atomic_t plus over flow guards.
 989 #
 990 AC_DEFUN([LIBCFS_REFCOUNT_T], [
 991 tmp_flags="$EXTRA_KCFLAGS"
 992 EXTRA_KCFLAGS="-Werror"
 993 LB_CHECK_LINUX_HEADER([linux/refcount.h], [
 994         AC_DEFINE(HAVE_REFCOUNT_T, 1,
 995                 [refcount_t is supported])
 996 ])
 997 EXTRA_KCFLAGS="$tmp_flags"
 998 ]) # LIBCFS_REFCOUNT_T
 999
1000 #
1001 # Kernel version 4.12 commit 499118e966f1d2150bd66647c8932343c4e9a0b8
1002 # introduce memalloc_noreclaim_{save,restore}
1003 #
1004 AC_DEFUN([LIBCFS_SRC_MEMALLOC_NORECLAIM], [
1005         LB2_LINUX_TEST_SRC([memalloc_noreclaim], [
1006                 #include <linux/sched/mm.h>
1007         ],[
1008                 int flag = memalloc_noreclaim_save();
1009                 memalloc_noreclaim_restore(flag);
1010         ])
1011 ])
1012 AC_DEFUN([LIBCFS_MEMALLOC_NORECLAIM], [
1013         AC_MSG_CHECKING([if memalloc_noreclaim_{save,restore} exist])
1014         LB2_LINUX_TEST_RESULT([memalloc_noreclaim], [
1015                 AC_DEFINE(HAVE_MEMALLOC_RECLAIM, 1,
1016                         [memalloc_noreclaim_{save,restore}() is supported])
1017         ])
1018 ]) # LIBCFS_MEMALLOC_NORECLAIM
1019
1020 #
1021 # LIBCFS_SCHED_HEADERS
1022 #
1023 # 4.11 has broken up sched.h into more headers.
1024 #
1025 AC_DEFUN([LIBCFS_SCHED_HEADERS], [
1026 LB_CHECK_LINUX_HEADER([linux/sched/signal.h], [
1027         AC_DEFINE(HAVE_SCHED_HEADERS, 1,
1028                 [linux/sched header directory exist])])
1029 ]) # LIBCFS_SCHED_HEADERS
1030
1031 #
1032 # Kernel version 4.11-rc1 commit 2c935bc57221cc2edc787c72ea0e2d30cdcd3d5e
1033 # introduce kref_read
1034 #
1035 AC_DEFUN([LIBCFS_SRC_KREF_READ], [
1036         LB2_LINUX_TEST_SRC([kref_read], [
1037                 #include <linux/kref.h>
1038         ],[
1039                 kref_read(NULL);
1040         ])
1041 ])
1042 AC_DEFUN([LIBCFS_KREF_READ], [
1043         AC_MSG_CHECKING([if 'kref_read' exists])
1044         LB2_LINUX_TEST_RESULT([kref_read], [
1045                 AC_DEFINE(HAVE_KREF_READ, 1, [kref_read() is available])
1046         ])
1047 ]) # LIBCFS_KREF_READ
1048
1049 #
1050 # Kernel version 4.11-rc1 commit da20420f83ea0fbcf3d03afda08d971ea1d8a356
1051 # introduced rht_bucket_var
1052 #
1053 AC_DEFUN([LIBCFS_SRC_RHT_BUCKET_VAR], [
1054         LB2_LINUX_TEST_SRC([rht_bucket_var], [
1055                 #include <linux/rhashtable.h>
1056         ],[
1057                 rht_bucket_var(NULL, 0);
1058         ])
1059 ])
1060 AC_DEFUN([LIBCFS_RHT_BUCKET_VAR], [
1061         AC_MSG_CHECKING([if 'rht_bucket_var' exists])
1062         LB2_LINUX_TEST_RESULT([rht_bucket_var], [
1063                 AC_DEFINE(HAVE_RHT_BUCKET_VAR, 1,
1064                         [rht_bucket_var() is available])
1065         ])
1066 ]) # LIBCFS_RHT_BUCKET_VAR
1067
1068 #
1069 # Kernel version 4.11-rc5 commit fceb6435e85298f747fee938415057af837f5a8a
1070 # began the enhanchement of Netlink with extended ACK struct for advanced
1071 # error handling. By commit 7ab606d1609dd6dfeae9c8ad0a8a4e051d831e46 we
1072 # had full support for this new feature.
1073 #
1074 AC_DEFUN([LIBCFS_SRC_NL_EXT_ACK], [
1075         LB2_LINUX_TEST_SRC([netlink_ext_ack], [
1076                 #include <net/genetlink.h>
1077         ],[
1078                 struct genl_info info;
1079
1080                 info.extack = NULL;
1081         ])
1082 ])
1083 AC_DEFUN([LIBCFS_NL_EXT_ACK], [
1084         AC_MSG_CHECKING([if Netlink supports netlink_ext_ack])
1085         LB2_LINUX_TEST_RESULT([netlink_ext_ack], [
1086                 AC_DEFINE(HAVE_NL_PARSE_WITH_EXT_ACK, 1,
1087                         [netlink_ext_ack is an argument to nla_parse type function])
1088         ])
1089 ]) # LIBCFS_NL_EXT_ACK
1090
1091 #
1092 # Kernel version 4.11 commit f9fe1c12d126f9887441fa5bb165046f30ddd4b5
1093 # introduced rhashtable_lookup_get_insert_fast
1094 #
1095 AC_DEFUN([LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
1096         LB2_LINUX_TEST_SRC([rhashtable_lookup_get_insert_fast], [
1097                 #include <linux/rhashtable.h>
1098         ],[
1099                 const struct rhashtable_params params = { 0 };
1100                 void *ret;
1101
1102                 ret = rhashtable_lookup_get_insert_fast(NULL, NULL, params);
1103         ])
1104 ])
1105 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
1106         AC_MSG_CHECKING([if 'rhashtable_lookup_get_insert_fast' exist])
1107         LB2_LINUX_TEST_RESULT([rhashtable_lookup_get_insert_fast], [
1108                 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP_GET_INSERT_FAST, 1,
1109                         [rhashtable_lookup_get_insert_fast() is available])
1110         ])
1111 ]) # LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
1112
1113 #
1114 # Kernel version 4.12-rc2 8f553c498e1772cccb39a114da4a498d22992758
1115 # provide proper CPU hotplug locking
1116 #
1117 AC_DEFUN([LIBCFS_SRC_CPUS_READ_LOCK], [
1118         LB2_LINUX_TEST_SRC([cpu_read_lock], [
1119                 #include <linux/cpu.h>
1120         ],[
1121                 cpus_read_lock();
1122                 cpus_read_unlock();
1123         ])
1124 ])
1125 AC_DEFUN([LIBCFS_CPUS_READ_LOCK], [
1126         AC_MSG_CHECKING([if 'cpus_read_[un]lock' exist])
1127         LB2_LINUX_TEST_RESULT([cpu_read_lock], [
1128                 AC_DEFINE(HAVE_CPUS_READ_LOCK, 1, ['cpus_read_lock' exist])
1129         ])
1130 ]) # LIBCFS_CPUS_READ_LOCK
1131
1132 #
1133 # Kernel version 4.12-rc3 commit fd851a3cdc196bfc1d229b5f22369069af532bf8
1134 # introduce processor.h
1135 #
1136 AC_DEFUN([LIBCFS_HAVE_PROCESSOR_HEADER], [
1137 tmp_flags="$EXTRA_KCFLAGS"
1138 EXTRA_KCFLAGS="-Werror"
1139 LB_CHECK_LINUX_HEADER([linux/processor.h], [
1140         AC_DEFINE(HAVE_PROCESSOR_H, 1,
1141                 [processor.h is present])
1142 ])
1143 EXTRA_KCFLAGS="$tmp_flags"
1144 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
1145
1146 #
1147 # Kernel verison 4.12-rc6 commit 5dd43ce2f69d42a71dcacdb13d17d8c0ac1fe8f7
1148 # created wait_bit.h
1149 #
1150 AC_DEFUN([LIBCFS_HAVE_WAIT_BIT_HEADER], [
1151 LB_CHECK_LINUX_HEADER([linux/wait_bit.h], [
1152         AC_DEFINE(HAVE_WAIT_BIT_HEADER_H, 1,
1153                 [wait_bit.h is present])])
1154 ]) # LIBCFS_HAVE_WAIT_BIT_HEADER
1155
1156 #
1157 # Kernel version 4.12-rc6 commmit 2055da97389a605c8a00d163d40903afbe413921
1158 # changed:
1159 #       struct wait_queue_head::task_list       => ::head
1160 #       struct wait_queue_entry::task_list      => ::entry
1161 #
1162 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME], [
1163         LB2_LINUX_TEST_SRC([wait_queue_task_list], [
1164                 #include <linux/wait.h>
1165         ],[
1166                 wait_queue_head_t e;
1167
1168                 INIT_LIST_HEAD(&e.head);
1169         ])
1170 ])
1171 AC_DEFUN([LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME], [
1172         AC_MSG_CHECKING([if linux wait_queue_head list_head is named head])
1173         LB2_LINUX_TEST_RESULT([wait_queue_task_list], [
1174                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_LIST, 1,
1175                         [linux wait_queue_head_t list_head is name head])
1176         ])
1177 ]) # LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
1178
1179 #
1180 # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1181 #
1182 # Kernel version v4.12-rc6-23-g76c85ddc4695
1183 # sched/wait: Standardize wait_bit_queue naming
1184 #
1185 # renamed struct wait_bit_queue  => wait_bit_queue_entry
1186 #
1187 AC_DEFUN([LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1188         LB2_LINUX_TEST_SRC([struct_wait_bit_queue_entry_exists], [
1189                 #include <linux/wait.h>
1190                 #if HAVE_WAIT_BIT_HEADER_H
1191                         #include <linux/wait_bit.h>
1192                 #endif
1193         ],[
1194                 struct wait_bit_queue_entry entry;
1195                 memset(&entry, 0, sizeof(entry));
1196         ])
1197 ])
1198 AC_DEFUN([LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1199         AC_MSG_CHECKING([if struct wait_bit_queue_entry exists])
1200         LB2_LINUX_TEST_RESULT([struct_wait_bit_queue_entry_exists], [
1201                 AC_DEFINE(HAVE_WAIT_BIT_QUEUE_ENTRY, 1,
1202                         [if struct wait_bit_queue_entry exists])
1203         ])
1204 ]) # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1205
1206 #
1207 # LIBCFS_NLA_STRDUP
1208 #
1209 # Kernel version 4.13-rc1 commit 2cf0c8b3e6942ecafe6ebb1a6d0328a81641bf39
1210 # created nla_strdup(). This is needed since push strings can be
1211 # any size.
1212 #
1213 AC_DEFUN([LIBCFS_SRC_NLA_STRDUP], [
1214         LB2_LINUX_TEST_SRC([nla_strdup], [
1215                 #include <net/netlink.h>
1216         ],[
1217                 char *tmp = nla_strdup(NULL, GFP_KERNEL);
1218                 (void)tmp;
1219         ],[])
1220 ])
1221 AC_DEFUN([LIBCFS_NLA_STRDUP], [
1222         AC_MSG_CHECKING([if 'nla_strdup()' exists])
1223         LB2_LINUX_TEST_RESULT([nla_strdup], [
1224                 AC_DEFINE(HAVE_NLA_STRDUP, 1,
1225                         ['nla_strdup' is available])
1226         ])
1227 ]) # LIBCFS_NLA_STRDUP
1228
1229 #
1230 # LIBCFS_WAIT_QUEUE_ENTRY
1231 #
1232 # Kernel version 4.13 ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f
1233 # Rename wait_queue_t => wait_queue_entry_t
1234 #
1235 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_ENTRY], [
1236         LB2_LINUX_TEST_SRC([wait_queue_entry], [
1237                 #include <linux/wait.h>
1238         ],[
1239                 wait_queue_entry_t e;
1240
1241                 e.flags = 0;
1242         ])
1243 ])
1244 AC_DEFUN([LIBCFS_WAIT_QUEUE_ENTRY], [
1245         AC_MSG_CHECKING([if 'wait_queue_entry_t' exists])
1246         LB2_LINUX_TEST_RESULT([wait_queue_entry], [
1247                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY, 1,
1248                         ['wait_queue_entry_t' is available])
1249         ])
1250 ]) # LIBCFS_WAIT_QUEUE_ENTRY
1251
1252 #
1253 # LIBCFS_NEW_KERNEL_WRITE
1254 #
1255 # Kernel version 4.14 e13ec939e96b13e664bb6cee361cc976a0ee621a
1256 # changed kernel_write prototype to make is plug compatible
1257 # with the unexported vfs_write()
1258 #
1259 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_WRITE], [
1260         LB2_LINUX_TEST_SRC([kernel_write_match], [
1261                 #include <linux/fs.h>
1262         ],[
1263                 const void *buf = NULL;
1264                 loff_t pos = 0;
1265                 return kernel_write(NULL, buf, 0, &pos);
1266         ],[-Werror])
1267 ])
1268 AC_DEFUN([LIBCFS_NEW_KERNEL_WRITE], [
1269         AC_MSG_CHECKING([if 'kernel_write' matches other read/write helpers])
1270         LB2_LINUX_TEST_RESULT([kernel_write_match], [
1271                 AC_DEFINE(HAVE_NEW_KERNEL_WRITE, 1,
1272                         ['kernel_write' aligns with read/write helpers])
1273         ])
1274 ]) # LIBCFS_NEW_KERNEL_WRITE
1275
1276 #
1277 # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1278 #
1279 # kernel 5.0 commit ca79b0c211af63fa3276f0e3fd7dd9ada2439839
1280 # mm: convert totalram_pages and totalhigh_pages variables to atomic
1281 #
1282 AC_DEFUN([LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC], [
1283         LB2_LINUX_TEST_SRC([totalram_pages], [
1284                 #include <linux/mm.h>
1285         ],[
1286                 totalram_pages_inc();
1287         ],[-Werror])
1288 ])
1289 AC_DEFUN([LIBCFS_MM_TOTALRAM_PAGES_FUNC], [
1290         AC_MSG_CHECKING([if totalram_pages is a function])
1291         LB2_LINUX_TEST_RESULT([totalram_pages], [
1292                 AC_DEFINE(HAVE_TOTALRAM_PAGES_AS_FUNC, 1,
1293                         [if totalram_pages is a function])
1294         ])
1295 ]) # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1296
1297 #
1298 # LIBCFS_NEW_KERNEL_READ
1299 #
1300 # 4.14 commit bdd1d2d3d251c65b74ac4493e08db18971c09240 changed
1301 # the signature of kernel_read to match other read/write helpers
1302 # and place offset last.
1303 #
1304 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_READ], [
1305         LB2_LINUX_TEST_SRC([kernel_read], [
1306                 #include <linux/fs.h>
1307         ],[
1308                 loff_t pos = 0;
1309                 kernel_read(NULL, NULL, 0, &pos);
1310         ],[-Werror])
1311 ])
1312 AC_DEFUN([LIBCFS_NEW_KERNEL_READ], [
1313         AC_MSG_CHECKING([if 'kernel_read()' has loff_t *pos as last parameter])
1314         LB2_LINUX_TEST_RESULT([kernel_read], [
1315                 AC_DEFINE(HAVE_KERNEL_READ_LAST_POSP, 1,
1316                         [kernel_read() signature ends with loff_t *pos])
1317         ])
1318 ]) # LIBCFS_NEW_KERNEL_READ
1319
1320 #
1321 # LIBCFS_DEFINE_TIMER
1322 #
1323 # Kernel version 4.14 commit 1d27e3e2252ba9d949ca82fbdb73cde102cb2067
1324 # remove expires and data arguments from DEFINE_TIMER. Also the callback
1325 # when from using unsigned long argument to using struct timer_list pointer.
1326 #
1327 AC_DEFUN([LIBCFS_SRC_DEFINE_TIMER], [
1328         LB2_LINUX_TEST_SRC([define_timer], [
1329                 #include <linux/timer.h>
1330         ],[
1331                 static DEFINE_TIMER(my_timer, NULL);
1332         ])
1333 ])
1334 AC_DEFUN([LIBCFS_DEFINE_TIMER], [
1335         AC_MSG_CHECKING([if DEFINE_TIMER takes only 2 arguments])
1336         LB2_LINUX_TEST_RESULT([define_timer], [
1337                 AC_DEFINE(HAVE_NEW_DEFINE_TIMER, 1,
1338                         [DEFINE_TIMER uses only 2 arguements])
1339         ])
1340 ]) # LIBCFS_DEFINE_TIMER
1341
1342 #
1343 # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1344 #
1345 # Kernel 2.6.27 commit 8594698ebddeef5443b7da8258ae33b3eaca61d5
1346 # exported save_stack_trace_tsk for x86.
1347 # Kernel 2.6.27 commit 01f4b8b8b8db09b88be7df7e51192e4e678b69d3
1348 # exported save_stack_trace_tsk for powerpc
1349 # Kernel 4.13 commit e27c7fa015d61c8be6a2c32b2144aad2ae6ec975
1350 # exported save_stack_trace_tsk for arm64
1351 # Kernel 4.14 commit 9a3dc3186fc3795e076a4122da9e0258651a9631
1352 # exported save_stack_trace_tsk for arm
1353 #
1354 AC_DEFUN([LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK], [
1355 LB_CHECK_EXPORT([save_stack_trace_tsk], [arch/$SUBARCH/kernel/stacktrace.c],
1356         [AC_DEFINE(HAVE_SAVE_STACK_TRACE_TSK, 1,
1357                 [save_stack_trace_tsk is exported])])
1358 ]) # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1359
1360 #
1361 # LIBCFS_LOCKDEP_IS_HELD
1362 #
1363 # Kernel v4.15-rc8-106-g08f36ff64234
1364 # lockdep: Make lockdep checking constant
1365 #
1366 AC_DEFUN([LIBCFS_SRC_LOCKDEP_IS_HELD], [
1367         LB2_LINUX_TEST_SRC([lockdep_is_held], [
1368                 #include <linux/lockdep.h>
1369         ],[
1370         #ifdef CONFIG_LOCKDEP
1371                 const struct spinlock *lock = NULL;
1372
1373                 lockdep_is_held(lock);
1374         #endif
1375         ],[-Werror])
1376 ])
1377 AC_DEFUN([LIBCFS_LOCKDEP_IS_HELD], [
1378         AC_MSG_CHECKING([if 'lockdep_is_held()' uses const argument])
1379         LB2_LINUX_TEST_RESULT([lockdep_is_held], [],[
1380                 AC_DEFINE(NEED_LOCKDEP_IS_HELD_DISCARD_CONST, 1,
1381                         [lockdep_is_held() argument is const])
1382         ])
1383 ]) # LIBCFS_LOCKDEP_IS_HELD
1384
1385 #
1386 # LIBCFS_TIMER_SETUP
1387 #
1388 # Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
1389 # setup_timer() was replaced by timer_setup(), where the callback
1390 # argument is the structure already holding the struct timer_list.
1391 #
1392 AC_DEFUN([LIBCFS_SRC_TIMER_SETUP], [
1393         LB2_LINUX_TEST_SRC([timer_setup], [
1394                 #include <linux/timer.h>
1395         ],[
1396                 timer_setup(NULL, NULL, 0);
1397         ])
1398 ])
1399 AC_DEFUN([LIBCFS_TIMER_SETUP], [
1400         AC_MSG_CHECKING([if setup_timer has been replaced with timer_setup])
1401         LB2_LINUX_TEST_RESULT([timer_setup], [
1402                 AC_DEFINE(HAVE_TIMER_SETUP, 1,
1403                         [timer_setup has replaced setup_timer])
1404         ])
1405 ]) # LIBCFS_TIMER_SETUP
1406
1407 #
1408 # LIBCFS_WAIT_VAR_EVENT
1409 #
1410 # Kernel version 4.16-rc4 commit 6b2bb7265f0b62605e8caee3613449ed0db270b9
1411 # added wait_var_event()
1412 #
1413 AC_DEFUN([LIBCFS_SRC_WAIT_VAR_EVENT], [
1414         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1415                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1416         else
1417                 WAIT_BIT_H=""
1418         fi
1419         LB2_LINUX_TEST_SRC([wait_var_event], [
1420                 #ifdef HAVE_WAIT_BIT_HEADER_H
1421                 #include <linux/wait_bit.h>
1422                 #endif
1423                 #include <linux/wait.h>
1424         ],[
1425                 wake_up_var(NULL);
1426         ],[${WAIT_BIT_H}])
1427 ])
1428 AC_DEFUN([LIBCFS_WAIT_VAR_EVENT], [
1429         AC_MSG_CHECKING([if 'wait_var_event' exist])
1430         LB2_LINUX_TEST_RESULT([wait_var_event], [
1431                 AC_DEFINE(HAVE_WAIT_VAR_EVENT, 1,
1432                         ['wait_var_event' is available])
1433         ])
1434 ]) # LIBCFS_WAIT_VAR_EVENT
1435
1436 #
1437 # LIBCFS_BITMAP_ALLOC
1438 #
1439 # Kernel version 4.17 commit c42b65e363ce97a828f81b59033c3558f8fa7f70
1440 # added bitmap memory allocation handling.
1441 #
1442 AC_DEFUN([LIBCFS_SRC_BITMAP_ALLOC], [
1443         LB2_LINUX_TEST_SRC([bitmap_alloc], [
1444                 #include <linux/bitmap.h>
1445         ],[
1446                 unsigned long *map = bitmap_alloc(1, GFP_KERNEL);
1447                 (void)map;
1448         ])
1449 ])
1450 AC_DEFUN([LIBCFS_BITMAP_ALLOC], [
1451         AC_MSG_CHECKING([if Linux bitmap memory management exist])
1452         LB2_LINUX_TEST_RESULT([bitmap_alloc], [
1453                 AC_DEFINE(HAVE_BITMAP_ALLOC, 1,
1454                         [Linux bitmap can be allocated])
1455         ])
1456 ]) # LIBCFS_BITMAP_ALLOC
1457
1458 #
1459 # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1460 #
1461 # Kernel version 4.17-rc2 commit 8236b0ae31c837d2b3a2565c5f8d77f637e824cc
1462 # added clear_and_wake_up_bit()
1463 #
1464 AC_DEFUN([LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT], [
1465         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1466                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1467         else
1468                 WAIT_BIT_H=""
1469         fi
1470         LB2_LINUX_TEST_SRC([clear_and_wake_up_bit], [
1471                 #ifdef HAVE_WAIT_BIT_HEADER_H
1472                 #include <linux/wait_bit.h>
1473                 #endif
1474                 #include <linux/wait.h>
1475         ],[
1476                 clear_and_wake_up_bit(0, NULL);
1477         ],[${WAIT_BIT_H}])
1478 ])
1479 AC_DEFUN([LIBCFS_CLEAR_AND_WAKE_UP_BIT], [
1480         AC_MSG_CHECKING([if 'clear_and_wake_up_bit' exist])
1481         LB2_LINUX_TEST_RESULT([clear_and_wake_up_bit], [
1482                 AC_DEFINE(HAVE_CLEAR_AND_WAKE_UP_BIT, 1,
1483                         ['clear_and_wake_up_bit' is available])
1484         ])
1485 ]) # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1486
1487 #
1488 # LIBCFS_TCP_SOCK_SET_NODELAY
1489 #
1490 # kernel 4.18.0-293.el8
1491 # tcp_sock_set_nodelay() was added
1492 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_NODELAY], [
1493         LB2_LINUX_TEST_SRC([tcp_sock_set_nodelay_exists], [
1494                 #include <linux/tcp.h>
1495         ],[
1496                 tcp_sock_set_nodelay(NULL);
1497         ],[-Werror])
1498 ])
1499 AC_DEFUN([LIBCFS_TCP_SOCK_SET_NODELAY], [
1500         AC_MSG_CHECKING([if 'tcp_sock_set_nodelay()' exists])
1501         LB2_LINUX_TEST_RESULT([tcp_sock_set_nodelay_exists], [
1502                 AC_DEFINE(HAVE_TCP_SOCK_SET_NODELAY, 1,
1503                         ['tcp_sock_set_nodelay()' exists])
1504         ])
1505 ]) # LIBCFS_TCP_SOCK_SET_NODELAY
1506
1507 #
1508 # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1509 #
1510 # kernel 4.18.0-293.el8
1511 # tcp_sock_set_keepidle() was added
1512 #
1513 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE], [
1514         LB2_LINUX_TEST_SRC([tcp_sock_set_keepidle_exists], [
1515                 #include <linux/tcp.h>
1516         ],[
1517                 tcp_sock_set_keepidle(NULL, 0);
1518         ],[-Werror])
1519 ])
1520 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPIDLE], [
1521         AC_MSG_CHECKING([if 'tcp_sock_set_keepidle()' exists])
1522         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepidle_exists], [
1523                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPIDLE, 1,
1524                         ['tcp_sock_set_keepidle()' exists])
1525         ])
1526 ]) # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1527
1528 #
1529 # LIBCFS_TCP_SOCK_SET_QUICKACK
1530 # kernel v5.7-rc6-2504-gddd061b8daed
1531 #   tcp: add tcp_sock_set_quickack
1532 #
1533 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_QUICKACK], [
1534         LB2_LINUX_TEST_SRC([tcp_sock_set_quickack_exists], [
1535                 #include <linux/tcp.h>
1536         ],[
1537                 tcp_sock_set_quickack(NULL, 0);
1538         ],[-Werror])
1539 ])
1540 AC_DEFUN([LIBCFS_TCP_SOCK_SET_QUICKACK], [
1541         AC_MSG_CHECKING([if 'tcp_sock_set_quickack()' exists])
1542         LB2_LINUX_TEST_RESULT([tcp_sock_set_quickack_exists], [
1543                 AC_DEFINE(HAVE_TCP_SOCK_SET_QUICKACK, 1,
1544                         ['tcp_sock_set_quickack()' exists])
1545         ])
1546 ]) # LIBCFS_TCP_SOCK_SET_QUICKACK
1547
1548 #
1549 # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1550 # v5.7-rc6-2508-gd41ecaac903c
1551 # tcp: add tcp_sock_set_keepintvl
1552 #
1553 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL], [
1554         LB2_LINUX_TEST_SRC([tcp_sock_set_keepintvl_exists], [
1555                 #include <linux/tcp.h>
1556         ],[
1557                 tcp_sock_set_keepintvl(NULL, 0);
1558         ],[-Werror])
1559 ])
1560 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPINTVL], [
1561         AC_MSG_CHECKING([if 'tcp_sock_set_keepintvl()' exists])
1562         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepintvl_exists], [
1563                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPINTVL, 1,
1564                         ['tcp_sock_set_keepintvl()' exists])
1565         ])
1566 ]) # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1567
1568 #
1569 # LIBCFS_TCP_SOCK_SET_KEEPCNT
1570 # v5.7-rc6-2509-g480aeb9639d6
1571 # tcp: add tcp_sock_set_keepcnt
1572 #
1573 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT], [
1574         LB2_LINUX_TEST_SRC([tcp_sock_set_keepcnt_exists], [
1575                 #include <linux/tcp.h>
1576         ],[
1577                 tcp_sock_set_keepcnt(NULL, 0);
1578         ],[-Werror])
1579 ])
1580 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPCNT], [
1581         AC_MSG_CHECKING([if 'tcp_sock_set_keepcnt()' exists])
1582         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepcnt_exists], [
1583                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPCNT, 1,
1584                         ['tcp_sock_set_keepcnt()' exists])
1585         ])
1586 ]) # LIBCFS_TCP_SOCK_SET_KEEPCNT
1587
1588 #
1589 # LIBCFS_XARRAY_SUPPORT
1590 #
1591 # 4.19-rc5 kernel commit 3159f943aafdbacb2f94c38fdaadabf2bbde2a14
1592 # replaced the radix tree implementation with Xarrays. This change
1593 # introduced functionaly needed for general Xarray support
1594 #
1595 AC_DEFUN([LIBCFS_SRC_XARRAY_SUPPORT], [
1596         LB2_LINUX_TEST_SRC([xarray_support], [
1597                 #include <linux/xarray.h>
1598         ],[
1599                 xa_is_value(NULL);
1600         ],[-Werror])
1601 ])
1602 AC_DEFUN([LIBCFS_XARRAY_SUPPORT], [
1603         AC_MSG_CHECKING([if page cache uses Xarray])
1604         LB2_LINUX_TEST_RESULT([xarray_support], [
1605                 AC_DEFINE(HAVE_XARRAY_SUPPORT, 1,
1606                         [kernel Xarray implementation lacks 'xa_is_value'])
1607         ])
1608 ]) # LIBCFS_XARRAY_SUPPORT
1609
1610 #
1611 # LIBCFS_NL_DUMP_EXT_ACK
1612 #
1613 # Kernel version 4.19-rc6 commit 4a19edb60d0203cd5bf95a8b46ea8f63fd41194c
1614 # added extended ACK handling to Netlink dump handlers
1615 #
1616 AC_DEFUN([LIBCFS_SRC_NL_DUMP_EXT_ACK], [
1617         LB2_LINUX_TEST_SRC([netlink_dump_ext_ack], [
1618                 #include <net/netlink.h>
1619         ],[
1620                 struct netlink_callback *cb = NULL;
1621                 cb->extack = NULL;
1622         ],[])
1623 ])
1624 AC_DEFUN([LIBCFS_NL_DUMP_EXT_ACK], [
1625         AC_MSG_CHECKING([if Netlink dump handlers support ext_ack])
1626         LB2_LINUX_TEST_RESULT([netlink_dump_ext_ack], [
1627                 AC_DEFINE(HAVE_NL_DUMP_WITH_EXT_ACK, 1,
1628                         [netlink_ext_ack is handled for Netlink dump handlers])
1629         ])
1630 ]) # LIBCFS_NL_DUMP_EXT_ACK
1631
1632 #
1633 # LIBCFS_HAVE_IOV_ITER_TYPE
1634 #
1635 # kernel 4.20 commit 00e23707442a75b404392cef1405ab4fd498de6b
1636 # iov_iter: Use accessor functions to access an iterator's type and direction.
1637 #
1638 AC_DEFUN([LIBCFS_SRC_HAVE_IOV_ITER_TYPE], [
1639         LB2_LINUX_TEST_SRC([macro_iov_iter_type_exists], [
1640                 #include <linux/uio.h>
1641         ],[
1642                 struct iov_iter iter = { };
1643                 enum iter_type type = iov_iter_type(&iter);
1644                 (void)type;
1645         ],[-Werror])
1646 ])
1647 AC_DEFUN([LIBCFS_HAVE_IOV_ITER_TYPE], [
1648         AC_MSG_CHECKING([if iov_iter_type exists])
1649         LB2_LINUX_TEST_RESULT([macro_iov_iter_type_exists], [
1650                 AC_DEFINE(HAVE_IOV_ITER_TYPE, 1,
1651                         [if iov_iter_type exists])
1652         ])
1653 ]) # LIBCFS_HAVE_IOV_ITER_TYPE
1654
1655 #
1656 # LIBCFS_GENRADIX
1657 #
1658 # Kernel 5.0 commit ba20ba2e3743bac786dff777954c11930256075e
1659 # implemented generic radix trees to handle very large memory
1660 # allocation that can be used instead of vmalloc which has
1661 # a performance penalty.
1662 #
1663 AC_DEFUN([LIBCFS_GENRADIX], [
1664 LB_CHECK_EXPORT([__genradix_ptr], [lib/generic-radix-tree.c],
1665         [AC_DEFINE(HAVE_GENRADIX_SUPPORT, 1,
1666                 [generic-radix-tree is present])])
1667 ]) # LIBCFS_GENRADIX
1668
1669 #
1670 # LIBCFS_GET_REQUEST_KEY_AUTH
1671 #
1672 # kernel 5.0 commit 822ad64d7e46a8e2c8b8a796738d7b657cbb146d
1673 # keys: Fix dependency loop between construction record and auth key
1674 #
1675 # Added <keys/request_key_auth-type.h> and get_request_key_auth()
1676 # which was propagated to stable
1677 #
1678 AC_DEFUN([LIBCFS_SRC_GET_REQUEST_KEY_AUTH], [
1679         LB2_LINUX_TEST_SRC([get_request_key_auth_exported], [
1680                 #include <linux/key.h>
1681                 #include <linux/keyctl.h>
1682                 #include <keys/request_key_auth-type.h>
1683         ],[
1684                 struct key *ring;
1685                 const struct key *key = NULL;
1686                 struct request_key_auth *rka = get_request_key_auth(key);
1687
1688                 ring = key_get(rka->dest_keyring);
1689         ],[-Werror])
1690 ])
1691 AC_DEFUN([LIBCFS_GET_REQUEST_KEY_AUTH], [
1692         AC_MSG_CHECKING([if get_request_key_auth() is available])
1693         LB2_LINUX_TEST_RESULT([get_request_key_auth_exported], [
1694                 AC_DEFINE(HAVE_GET_REQUEST_KEY_AUTH, 1,
1695                         [get_request_key_auth() is available])
1696         ])
1697 ]) # LIBCFS_GET_REQUEST_KEY_AUTH
1698
1699 #
1700 # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1701 #
1702 # Linux commit v5.1-rc3-29-gaa30f47cf666
1703 #    kobject: Add support for default attribute groups to kobj_type
1704 # Linux commit v5.18-rc1-2-gcdb4f26a63c3
1705 #    kobject: kobj_type: remove default_attrs
1706 #
1707 AC_DEFUN([LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS],[
1708         LB2_LINUX_TEST_SRC([kobj_type_default_groups], [
1709                 #include <linux/kobject.h>
1710         ],[
1711                 struct kobj_type *kobj_type = NULL;
1712                 void *has = kobj_type->default_groups;
1713                 (void) has;
1714         ])
1715 ])
1716 AC_DEFUN([LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS],[
1717         AC_MSG_CHECKING([does struct kobj_type have 'default_groups' member])
1718         LB2_LINUX_TEST_RESULT([kobj_type_default_groups], [
1719                 AC_DEFINE(HAVE_KOBJ_TYPE_DEFAULT_GROUPS, 1,
1720                         [struct kobj_type has 'default_groups' member])
1721         ])
1722 ]) # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1723
1724 #
1725 # LIBCFS_LOOKUP_USER_KEY
1726 #
1727 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1728 # signal: Remove task parameter from force_sig
1729 #
1730 AC_DEFUN([LIBCFS_SRC_LOOKUP_USER_KEY], [
1731         LB2_LINUX_TEST_SRC([lookup_user_key_exported], [
1732                 #include <linux/key.h>
1733                 #include <linux/keyctl.h>
1734         ],[
1735                 lookup_user_key(KEY_SPEC_USER_KEYRING, 0, 0);
1736         ],[-Werror])
1737 ])
1738 AC_DEFUN([LIBCFS_LOOKUP_USER_KEY], [
1739         AC_MSG_CHECKING([if lookup_user_key() is available])
1740         LB2_LINUX_TEST_RESULT([lookup_user_key_exported], [
1741                 AC_DEFINE(HAVE_LOOKUP_USER_KEY, 1,
1742                         [lookup_user_key() is available])
1743         ])
1744 ]) # LIBCFS_LOOKUP_USER_KEY
1745
1746 #
1747 # LIBCFS_FORCE_SIG_WITH_TASK
1748 #
1749 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1750 # signal: Remove task parameter from force_sig
1751 #
1752 AC_DEFUN([LIBCFS_SRC_FORCE_SIG_WITH_TASK], [
1753         LB2_LINUX_TEST_SRC([force_sig_with_task], [
1754                 #include <linux/sched/signal.h>
1755         ],[
1756                 force_sig(SIGINT, NULL);
1757         ],[-Werror])
1758 ])
1759 AC_DEFUN([LIBCFS_FORCE_SIG_WITH_TASK], [
1760         AC_MSG_CHECKING([if force_sig has task parameter])
1761         LB2_LINUX_TEST_RESULT([force_sig_with_task], [
1762                 AC_DEFINE(HAVE_FORCE_SIG_WITH_TASK, 1,
1763                         [force_sig() has task parameter])
1764         ])
1765 ]) # LIBCFS_FORCE_SIG_WITH_TASK
1766
1767 #
1768 # LIBCFS_CACHE_DETAIL_WRITERS
1769 #
1770 # kernel v5.3-rc2-1-g64a38e840ce5
1771 # SUNRPC: Track writers of the 'channel' file to improve cache_listeners_exist
1772 #
1773 AC_DEFUN([LIBCFS_SRC_CACHE_DETAIL_WRITERS], [
1774         LB2_LINUX_TEST_SRC([cache_detail_writers_atomic], [
1775                 #include <linux/sunrpc/cache.h>
1776
1777                 static struct cache_detail rsi_cache;
1778         ],[
1779                 atomic_set(&rsi_cache.writers, 0);
1780         ],[-Werror])
1781 ])
1782 AC_DEFUN([LIBCFS_CACHE_DETAIL_WRITERS], [
1783         AC_MSG_CHECKING([if struct cache_detail has writers])
1784         LB2_LINUX_TEST_RESULT([cache_detail_writers_atomic], [
1785                 AC_DEFINE(HAVE_CACHE_DETAIL_WRITERS, 1,
1786                         [struct cache_detail has writers])
1787         ])
1788 ]) # LIBCFS_CACHE_DETAIL_WRITERS
1789
1790 #
1791 # LIBCFS_GENL_DUMPIT_INFO
1792 #
1793 # kernel v5.4-rc1 commit bf813b0afeae2f012f0e527a526c1b78ca21ad82
1794 # expanded struct genl_dumpit_info to include struct genl_family.
1795 #
1796 AC_DEFUN([LIBCFS_SRC_GENL_DUMPIT_INFO], [
1797         LB2_LINUX_TEST_SRC([genl_dumpit_info], [
1798                 #include <net/genetlink.h>
1799         ],[
1800                 static struct genl_dumpit_info info;
1801
1802                 info.family = NULL;
1803         ],[-Werror])
1804 ])
1805 AC_DEFUN([LIBCFS_GENL_DUMPIT_INFO], [
1806         AC_MSG_CHECKING([if struct genl_dumpit_info has family field])
1807         LB2_LINUX_TEST_RESULT([genl_dumpit_info], [
1808                 AC_DEFINE(HAVE_GENL_DUMPIT_INFO, 1,
1809                         [struct genl_dumpit_info has family field])
1810         ])
1811 ]) # LIBCFS_GENL_DUMPIT_INFO
1812
1813 #
1814 # LIBCFS_KALLSYMS_LOOKUP
1815 #
1816 # kernel v5.6-11591-g0bd476e6c671
1817 # kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()
1818 AC_DEFUN([LIBCFS_KALLSYMS_LOOKUP], [
1819 LB_CHECK_EXPORT([kallsyms_lookup_name], [kernel/kallsyms.c],
1820         [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1821                 [kallsyms_lookup_name is exported by kernel])])
1822 ]) # LIBCFS_KALLSYMS_LOOKUP
1823
1824 #
1825 # v5.5-8862-gd56c0d45f0e2
1826 # proc: decouple proc from VFS with "struct proc_ops"
1827 #
1828 AC_DEFUN([LIBCFS_SRC_HAVE_PROC_OPS], [
1829         LB2_LINUX_TEST_SRC([proc_ops], [
1830                 #include <linux/proc_fs.h>
1831
1832                 static struct proc_ops *my_proc;
1833         ],[
1834                 my_proc->proc_lseek = NULL;
1835         ],[-Werror])
1836 ]) # LIBCFS_SRC_HAVE_PROC_OPS
1837 AC_DEFUN([LIBCFS_HAVE_PROC_OPS], [
1838         AC_MSG_CHECKING([if struct proc_ops exists])
1839         LB2_LINUX_TEST_RESULT([proc_ops], [
1840                 AC_DEFINE(HAVE_PROC_OPS, 1,
1841                         [struct proc_ops exists])
1842         ])
1843 ]) # LIBCFS_HAVE_PROC_OPS
1844
1845 #
1846 # LIBCFS_IP6_SET_PREF
1847 #
1848 # kernel v5.8-rc1~165^2~71^2~3 commit 18d5ad62327576cbb1e5b9938a59d63ac0c15832
1849 # ipv6: add ip6_sock_set_addr_preferences
1850 #
1851 AC_DEFUN([LIBCFS_SRC_IP6_SET_PREF], [
1852         LB2_LINUX_TEST_SRC([ip6_set_pref_test], [
1853                 #include <net/ipv6.h>
1854         ],[
1855                 ip6_sock_set_addr_preferences(NULL, 0);
1856         ],[-Werror])
1857 ])
1858 AC_DEFUN([LIBCFS_IP6_SET_PREF], [
1859         AC_MSG_CHECKING([if ip6_sock_set_addr_preferences() exists])
1860         LB2_LINUX_TEST_RESULT([ip6_set_pref_test], [
1861                 AC_DEFINE(HAVE_IP6_SET_PREF, 1,
1862                         [if ip6_sock_set_addr_preferences exists])
1863         ])
1864 ]) # LIBCFS_IP6_SET_PREF
1865
1866 #
1867 # LIBCFS_VMALLOC_2ARGS
1868 #
1869 # kernel v5.8-rc1~201^2~19
1870 # mm: remove the pgprot argument to __vmalloc
1871 AC_DEFUN([LIBCFS_SRC_VMALLOC_2ARGS], [
1872         LB2_LINUX_TEST_SRC([vmalloc_2args], [
1873                 #include <linux/vmalloc.h>
1874         ],[
1875                 __vmalloc(0, 0);
1876         ],[])
1877 ])
1878 AC_DEFUN([LIBCFS_VMALLOC_2ARGS], [
1879         AC_MSG_CHECKING([if __vmalloc has 2 args])
1880         LB2_LINUX_TEST_RESULT([vmalloc_2args], [
1881                 AC_DEFINE(HAVE_VMALLOC_2ARGS, 1,
1882                         [__vmalloc only takes 2 args.])
1883         ])
1884 ]) # LIBCFS_VMALLOC_2ARGS
1885
1886 #
1887 # LIBCFS_HAVE_NR_UNSTABLE_NFS
1888 #
1889 # kernel v5.8-rc1~201^2~75
1890 # mm/writeback: discard NR_UNSTABLE_NFS, use NR_WRITEBACK instead
1891 #
1892 AC_DEFUN([LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS], [
1893         LB2_LINUX_TEST_SRC([nr_unstable_nfs_exists], [
1894                 #include <linux/mm.h>
1895
1896                 int i;
1897         ],[
1898                 i = NR_UNSTABLE_NFS;
1899         ],[-Werror])
1900 ])
1901 AC_DEFUN([LIBCFS_HAVE_NR_UNSTABLE_NFS], [
1902         AC_MSG_CHECKING([if NR_UNSTABLE_NFS still in use])
1903         LB2_LINUX_TEST_RESULT([nr_unstable_nfs_exists], [
1904                 AC_DEFINE(HAVE_NR_UNSTABLE_NFS, 1,
1905                         [NR_UNSTABLE_NFS is still in use.])
1906         ])
1907 ]) # LIBCFS_HAVE_NR_UNSTABLE_NFS
1908
1909 #
1910 # LIBCFS_HAVE_MMAP_LOCK
1911 #
1912 # kernel v5.8-rc1~83^2~24
1913 # mmap locking API: rename mmap_sem to mmap_lock
1914 #
1915 AC_DEFUN([LIBCFS_SRC_HAVE_MMAP_LOCK], [
1916         LB2_LINUX_TEST_SRC([mmap_write_lock], [
1917                 #include <linux/mm.h>
1918         ],[
1919                 mmap_write_lock(NULL);
1920         ],[])
1921 ])
1922 AC_DEFUN([LIBCFS_HAVE_MMAP_LOCK], [
1923         AC_MSG_CHECKING([if mmap_lock API is available])
1924         LB2_LINUX_TEST_RESULT([mmap_write_lock], [
1925                 AC_DEFINE(HAVE_MMAP_LOCK, 1,
1926                         [mmap_lock API is available.])
1927         ])
1928 ]) # LIBCFS_HAVE_MMAP_LOCK
1929
1930 #
1931 # LIBCFS_KERNEL_SETSOCKOPT
1932 #
1933 # kernel v5.8-rc1~165^2~59^2
1934 # net: remove kernel_setsockopt
1935 AC_DEFUN([LIBCFS_SRC_KERNEL_SETSOCKOPT], [
1936         LB2_LINUX_TEST_SRC([kernel_setsockopt_exists], [
1937                 #include <linux/net.h>
1938         ],[
1939                 kernel_setsockopt(NULL, 0, 0, NULL, 0);
1940         ],[-Werror])
1941 ])
1942 AC_DEFUN([LIBCFS_KERNEL_SETSOCKOPT], [
1943         AC_MSG_CHECKING([if kernel_setsockopt still in use])
1944         LB2_LINUX_TEST_RESULT([kernel_setsockopt_exists], [
1945         AC_DEFINE(HAVE_KERNEL_SETSOCKOPT, 1,
1946                 [kernel_setsockopt still in use])
1947         ])
1948 ]) # LIBCFS_KERNEL_SETSOCKOPT
1949
1950 #
1951 # LIBCFS_KEY_NEED_UNLINK
1952 #
1953 # kernel 5.8 commit 8c0637e950d68933a67f7438f779d79b049b5e5c
1954 # keys: Make the KEY_NEED_* perms an enum rather than a mask
1955 #
1956 AC_DEFUN([LIBCFS_SRC_KEY_NEED_UNLINK], [
1957         LB2_LINUX_TEST_SRC([key_need_unlink_exists], [
1958                 #include <linux/key.h>
1959                 #include <linux/keyctl.h>
1960         ],[
1961                 lookup_user_key(0, 0, KEY_NEED_UNLINK);
1962         ],[-Werror])
1963 ])
1964 AC_DEFUN([LIBCFS_KEY_NEED_UNLINK], [
1965         AC_MSG_CHECKING([if KEY_NEED_UNLINK exists])
1966         LB2_LINUX_TEST_RESULT([key_need_unlink_exists], [
1967                 AC_DEFINE(HAVE_KEY_NEED_UNLINK, 1,
1968                         [KEY_NEED_UNLINK exists])
1969         ])
1970 ]) # LIBCFS_KEY_NEED_UNLINK
1971
1972 #
1973 # LIBCFS_SEC_RELEASE_SECCTX
1974 #
1975 # kernel linux-hwe-5.8 (5.8.0-22.23~20.04.1)
1976 # LSM: Use lsmcontext in security_release_secctx
1977 AC_DEFUN([LIBCFS_SRC_SEC_RELEASE_SECCTX], [
1978         LB2_LINUX_TEST_SRC([security_release_secctx_1arg], [
1979                 #include <linux/security.h>
1980         ],[
1981                 security_release_secctx(NULL);
1982         ],[])
1983 ])
1984 AC_DEFUN([LIBCFS_SEC_RELEASE_SECCTX], [
1985         AC_MSG_CHECKING([if security_release_secctx has 1 arg])
1986         LB2_LINUX_TEST_RESULT([security_release_secctx_1arg], [
1987                 AC_DEFINE(HAVE_SEC_RELEASE_SECCTX_1ARG, 1,
1988                         [security_release_secctx has 1 arg.])
1989         ])
1990 ]) # LIBCFS_SEC_RELEASE_SECCTX
1991
1992 #
1993 # LIBCFS_HAVE_KFREE_SENSITIVE
1994 #
1995 # kernel v5.10-rc1~3
1996 # mm: remove kzfree() compatibility definition
1997 #
1998 AC_DEFUN([LIBCFS_SRC_HAVE_KFREE_SENSITIVE], [
1999         LB2_LINUX_TEST_SRC([kfree_sensitive_exists], [
2000                 #include <linux/slab.h>
2001         ],[
2002                 kfree_sensitive(NULL);
2003         ], [-Werror])
2004 ])
2005 AC_DEFUN([LIBCFS_HAVE_KFREE_SENSITIVE], [
2006         AC_MSG_CHECKING([if kfree_sensitive() is available])
2007         LB2_LINUX_TEST_RESULT([kfree_sensitive_exists], [
2008                 AC_DEFINE(HAVE_KFREE_SENSITIVE, 1,
2009                         [kfree_sensitive() is available.])
2010         ])
2011 ]) # LIBCFS_HAVE_KFREE_SENSITIVE
2012
2013 #
2014 # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2015 #
2016 # Kernel v5.10-rc1-114-ga24d22b225ce
2017 # crypto: sha - split sha.h into sha1.h and sha2.h
2018 #
2019 AC_DEFUN([LIBCFS_HAVE_CRYPTO_SHA2_HEADER], [
2020 LB_CHECK_LINUX_HEADER([crypto/sha2.h], [
2021         AC_DEFINE(HAVE_CRYPTO_SHA2_HEADER, 1,
2022                 [crypto/sha2.h is present])])
2023 ]) # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2024
2025 #
2026 # LIBCFS_HAVE_LIST_CMP_FUNC_T
2027 #
2028 # kernel 5.10.70 commit 4f0f586bf0c898233d8f316f471a21db2abd522d
2029 # treewide: Change list_sort to use const pointers
2030 AC_DEFUN([LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T], [
2031         LB2_LINUX_TEST_SRC([list_cmp_func_t_exists], [
2032                 #include <linux/list_sort.h>
2033         ],[
2034                 list_cmp_func_t cmp;
2035                 (void)cmp;
2036         ], [-Werror])
2037 ])
2038 AC_DEFUN([LIBCFS_HAVE_LIST_CMP_FUNC_T], [
2039         AC_MSG_CHECKING([if list_cmp_func_t type is defined])
2040         LB2_LINUX_TEST_RESULT([list_cmp_func_t_exists], [
2041                 AC_DEFINE(HAVE_LIST_CMP_FUNC_T, 1,
2042                         [list_cmp_func_t type is defined])
2043         ])
2044 ]) # LIBCFS_HAVE_LIST_CMP_FUNC_T
2045
2046 #
2047 # LIBCFS_NLA_STRLCPY
2048 #
2049 # Kernel version 5.10-rc3 commit 872f690341948b502c93318f806d821c56772c42
2050 # replaced nla_strlcpy() with nla_strscpy().
2051 #
2052 AC_DEFUN([LIBCFS_SRC_NLA_STRLCPY], [
2053         LB2_LINUX_TEST_SRC([nla_strlcpy], [
2054                 #include <net/netlink.h>
2055         ],[
2056                 if (nla_strlcpy(NULL, NULL, 0) == 0)
2057                         return -EINVAL;
2058         ])
2059 ])
2060 AC_DEFUN([LIBCFS_NLA_STRLCPY], [
2061         AC_MSG_CHECKING([if 'nla_strlcpy()' still exists])
2062         LB2_LINUX_TEST_RESULT([nla_strlcpy], [
2063                 AC_DEFINE(HAVE_NLA_STRLCPY, 1,
2064                         ['nla_strlcpy' is available])
2065         ])
2066 ]) # LIBCFS_NLA_STRLCPY
2067
2068 #
2069 # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2070 #
2071 # Linux v5.11-11104-ga28a6e860c6c
2072 #  string.h: move fortified functions definitions in a dedicated header.
2073 #
2074 AC_DEFUN([LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER],[
2075         LB2_LINUX_TEST_SRC([linux_fortify_string_header], [
2076                 #include <linux/fortify-string.h>
2077         ],[
2078         ],[])
2079 ])
2080 AC_DEFUN([LIBCFS_LINUX_FORTIFY_STRING_HEADER],[
2081         AC_MSG_CHECKING([Is linux/fortify-string.h header available])
2082         LB2_LINUX_TEST_RESULT([linux_fortify_string_header], [
2083                 AC_DEFINE(HAVE_LINUX_FORTIFY_STRING_HEADER, 1,
2084                         [linux/fortify-string.h header available])
2085         ])
2086 ]) # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2087
2088 #
2089 # LIBCFS_HAVE_CIPHER_HEADER
2090 #
2091 # Kernel 5.12 commit 0eb76ba29d16df2951d37c54ca279c4e5630b071
2092 # crypto: remove cipher routines from public crypto API
2093 #
2094 AC_DEFUN([LIBCFS_HAVE_CIPHER_HEADER], [
2095 tmp_flags="$EXTRA_KCFLAGS"
2096 EXTRA_KCFLAGS="-Werror"
2097 LB_CHECK_LINUX_HEADER([crypto/internal/cipher.h], [
2098         AC_DEFINE(HAVE_CIPHER_H, 1,
2099                 [crypto/internal/cipher.h is present])
2100 ])
2101 EXTRA_KCFLAGS="$tmp_flags"
2102 ]) # LIBCFS_HAVE_CIPHER_HEADER
2103
2104 #
2105 # LIBCFS_HAVE_TASK_RUNNING
2106 #
2107 # Kernel 5.13-rc6 commit b03fbd4ff24c5f075e58eb19261d5f8b3e40d
2108 # introduced task_is_running() macro.
2109 #
2110 AC_DEFUN([LIBCFS_SRC_HAVE_TASK_IS_RUNNING], [
2111         LB2_LINUX_TEST_SRC([task_is_running], [
2112                 #include <linux/sched.h>
2113         ],[
2114                 if (task_is_running(current))
2115                         schedule();
2116         ], [-Werror])
2117 ])
2118 AC_DEFUN([LIBCFS_HAVE_TASK_IS_RUNNING], [
2119         AC_MSG_CHECKING([if task_is_running() is defined])
2120         LB2_LINUX_TEST_RESULT([task_is_running], [
2121                 AC_DEFINE(HAVE_TASK_IS_RUNNING, 1,
2122                         [task_is_running() is defined])
2123         ])
2124 ]) # LIBCFS_HAVE_TASK_IS_RUNNING
2125
2126 #
2127 # LIBCFS_LINUX_STDARG_HEADER
2128 #
2129 # Kernel 5.14-rc5 commit c0891ac15f0428ffa81b2e818d416bdf3cb74ab6
2130 # isystem: ship and use stdarg.h
2131 #
2132 AC_DEFUN([LIBCFS_LINUX_STDARG_HEADER], [
2133 tmp_flags="$EXTRA_KCFLAGS"
2134 EXTRA_KCFLAGS="-Werror"
2135 LB_CHECK_LINUX_HEADER([linux/stdarg.h], [
2136         AC_DEFINE(HAVE_LINUX_STDARG_HEADER, 1, [linux/stdarg.h is present])
2137 ])
2138 EXTRA_KCFLAGS="$tmp_flags"
2139 ]) # LIBCFS_LINUX_STDARG_HEADER
2140
2141 #
2142 # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2143 #
2144 # Kernel 5.14 commit f39650de687e35766572ac89dbcd16a5911e2f0a
2145 # kernel.h: split out panic and oops helpers
2146 #
2147 AC_DEFUN([LIBCFS_HAVE_PANIC_NOTIFIER_HEADER], [
2148 tmp_flags="$EXTRA_KCFLAGS"
2149 EXTRA_KCFLAGS="-Werror"
2150 LB_CHECK_LINUX_HEADER([linux/panic_notifier.h], [
2151         AC_DEFINE(HAVE_PANIC_NOTIFIER_H, 1,
2152                 [linux/panic_notifier.h is present])
2153 ])
2154 EXTRA_KCFLAGS="$tmp_flags"
2155 ]) # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2156
2157 #
2158 # LIBCFS_PARAM_SET_UINT_MINMAX
2159 #
2160 # Kernel 5.15-rc1 commit 2a14c9ae15a38148484a128b84bff7e9ffd90d68
2161 # moved param_set_uint_minmax to common code
2162 #
2163 AC_DEFUN([LIBCFS_SRC_PARAM_SET_UINT_MINMAX],[
2164         LB2_LINUX_TEST_SRC([param_set_uint_minmax], [
2165                 #include <linux/moduleparam.h>
2166         ],[
2167                 param_set_uint_minmax(NULL, NULL, 0, 0);
2168         ], [])
2169 ])
2170 AC_DEFUN([LIBCFS_PARAM_SET_UINT_MINMAX],[
2171         AC_MSG_CHECKING([does function 'param_set_uint_minmax' exist])
2172         LB2_LINUX_TEST_RESULT([param_set_uint_minmax], [
2173                 AC_DEFINE(HAVE_PARAM_SET_UINT_MINMAX, 1,
2174                         ['param_set_uint_minmax' is available])
2175         ])
2176 ]) # LIBCFS_PARAM_SET_UINT_MINMAX
2177
2178 #
2179 # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2180 #
2181 # Kernel 5.15-rc6 commit fe45e630a1035aea94c29016f2598bbde149bbe3
2182 # block: move integrity handling out of <linux/blkdev.h>
2183 #
2184 AC_DEFUN([LIBCFS_LINUX_BLK_INTEGRITY_HEADER], [
2185 tmp_flags="$EXTRA_KCFLAGS"
2186 EXTRA_KCFLAGS="-Werror"
2187 LB_CHECK_LINUX_HEADER([linux/blk-integrity.h], [
2188         AC_DEFINE(HAVE_LINUX_BLK_INTEGRITY_HEADER, 1,
2189                 [linux/blk-integrity.h is present])
2190 ])
2191 EXTRA_KCFLAGS="$tmp_flags"
2192 ]) # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2193
2194 #
2195 # LIBCFS_PDE_DATA_EXISTS
2196 #
2197 # Linux commit v5.16-11573-g6dfbbae14a7b
2198 #    introduce pde_data()
2199 # Linux commit v5.16-11574-g359745d78351
2200 #    remove PDE_DATA()
2201 #
2202 AC_DEFUN([LIBCFS_SRC_PDE_DATA_EXISTS],[
2203         LB2_LINUX_TEST_SRC([pde_data], [
2204                 #include <linux/proc_fs.h>
2205         ],[
2206                 struct inode *inode = NULL;
2207                 void *data =pde_data(inode);
2208                 (void)data;
2209         ],[])
2210 ])
2211 AC_DEFUN([LIBCFS_PDE_DATA_EXISTS],[
2212         AC_MSG_CHECKING([does function 'pde_data' exist])
2213         LB2_LINUX_TEST_RESULT([pde_data], [
2214                 AC_DEFINE(HAVE_pde_data, 1, [function pde_data() available])
2215         ],[
2216                 AC_DEFINE(pde_data(inode), PDE_DATA(inode),
2217                           [function pde_data() unavailable])
2218         ])
2219 ]) # LIBCFS_PDE_DATA_EXISTS
2220
2221 #
2222 # LIBCFS_BIO_ALLOC_WITH_BDEV
2223 #
2224 # Linux commit v5.17-rc2-21-g07888c665b40
2225 #   block: pass a block_device and opf to bio_alloc
2226 #
2227 AC_DEFUN([LIBCFS_SRC_BIO_ALLOC_WITH_BDEV],[
2228         LB2_LINUX_TEST_SRC([bio_alloc_with_bdev], [
2229                 #include <linux/bio.h>
2230         ],[
2231                 struct block_device *bdev = NULL;
2232                 unsigned short nr_vecs = 1;
2233                 gfp_t gfp = GFP_KERNEL;
2234                 struct bio *bio = bio_alloc(bdev, nr_vecs, REQ_OP_WRITE, gfp);
2235                 (void) bio;
2236         ],[])
2237 ])
2238 AC_DEFUN([LIBCFS_BIO_ALLOC_WITH_BDEV],[
2239         AC_MSG_CHECKING([does bio_alloc() takes a struct block_device])
2240         LB2_LINUX_TEST_RESULT([bio_alloc_with_bdev], [
2241                 AC_DEFINE(HAVE_BIO_ALLOC_WITH_BDEV, 1,
2242                         [bio_alloc() takes a struct block_device])
2243         ])
2244 ]) # LIBCFS_BIO_ALLOC_WITH_BDEV
2245
2246 #
2247 # LIBCFS_TIMER_DELETE_SYNC
2248 #
2249 # Linux commit v6.1-rc1-7-g9a5a30568697
2250 #   timers: Get rid of del_singleshot_timer_sync()
2251 # Linux commit v6.1-rc1-11-g9b13df3fb64e
2252 #   timers: Rename del_timer_sync() to timer_delete_sync()
2253 #
2254 AC_DEFUN([LIBCFS_SRC_TIMER_DELETE_SYNC],[
2255         LB2_LINUX_TEST_SRC([timer_delete_sync], [
2256                 #include <linux/timer.h>
2257         ],[
2258                 struct timer_list *timer = NULL;
2259                 (void)timer_delete_sync(timer);
2260         ],[])
2261 ])
2262 AC_DEFUN([LIBCFS_TIMER_DELETE_SYNC],[
2263         AC_MSG_CHECKING([is timer_delete_sync() available])
2264         LB2_LINUX_TEST_RESULT([timer_delete_sync], [
2265                 AC_DEFINE(HAVE_TIMER_DELETE_SYNC, 1,
2266                         [timer_delete_sync() is available])
2267         ],[
2268                 AC_DEFINE(timer_delete_sync(t), del_timer_sync(t),
2269                         [timer_delete_sync() not is available])
2270         ])
2271 ]) # LIBCFS_TIMER_DELETE_SYNC
2272
2273 #
2274 # LIBCFS_TIMER_DELETE_SYNC
2275 #
2276 # Linux commit v6.1-rc1-12-gbb663f0f3c39
2277 #   timers: Rename del_timer() to timer_delete()
2278 #
2279 AC_DEFUN([LIBCFS_SRC_TIMER_DELETE],[
2280         LB2_LINUX_TEST_SRC([timer_delete], [
2281                 #include <linux/timer.h>
2282         ],[
2283                 struct timer_list *timer = NULL;
2284                 (void)timer_delete(timer);
2285         ],[])
2286 ])
2287 AC_DEFUN([LIBCFS_TIMER_DELETE],[
2288         AC_MSG_CHECKING([is timer_delete() available])
2289         LB2_LINUX_TEST_RESULT([timer_delete], [
2290                 AC_DEFINE(HAVE_TIMER_DELETE, 1,
2291                         [timer_delete() is available])
2292         ],[
2293                 AC_DEFINE(timer_delete(t), del_timer(t),
2294                         [timer_delete() not is available])
2295         ])
2296 ]) # LIBCFS_TIMER_DELETE
2297
2298 dnl #
2299 dnl # Generate and compile all of the kernel API test cases to determine
2300 dnl # which interfaces are available.  By invoking the kernel build system
2301 dnl # only once the compilation can be done in parallel significantly
2302 dnl # speeding up the process.
2303 dnl #
2304 AC_DEFUN([LIBCFS_PROG_LINUX_SRC], [
2305         # 3.11
2306         LIBCFS_SRC_KTIME_GET_TS64
2307         # 3.12
2308         LIBCFS_SRC_PREPARE_TO_WAIT_EVENT
2309         LIBCFS_SRC_KERNEL_PARAM_OPS
2310         LIBCFS_SRC_KTIME_ADD
2311         LIBCFS_SRC_KTIME_AFTER
2312         LIBCFS_SRC_KTIME_BEFORE
2313         LIBCFS_SRC_KTIME_COMPARE
2314         LIBCFS_SRC_SHRINKER_COUNT
2315         # 3.13
2316         LIBCFS_SRC_MATCH_WILDCARD
2317         # 3.14
2318         LIBCFS_SRC_HAVE_MAPPING_AS_EXITING_FLAG
2319         # 3.15
2320         LIBCFS_SRC_IOV_ITER_HAS_TYPE
2321         # 3.16
2322         LIBCFS_SRC_HAVE_GLOB
2323         # 3.17
2324         LIBCFS_SRC_HLIST_ADD_AFTER
2325         LIBCFS_SRC_TIMESPEC64
2326         LIBCFS_SRC_KTIME_GET_NS
2327         LIBCFS_SRC_KTIME_GET_REAL_TS64
2328         LIBCFS_SRC_KTIME_GET_REAL_SECONDS
2329         LIBCFS_SRC_KTIME_GET_REAL_NS
2330         LIBCFS_SRC_KTIME_TO_TIMESPEC64
2331         LIBCFS_SRC_TIMESPEC64_SUB
2332         LIBCFS_SRC_TIMESPEC64_TO_KTIME
2333         # 3.19
2334         LIBCFS_SRC_KTIME_GET_SECONDS
2335         LIBCFS_SRC_WAIT_WOKEN
2336         # 4.0
2337         LIBCFS_SRC_KTIME_MS_DELTA
2338         # 4.1
2339         LIBCFS_SRC_KERNEL_PARAM_LOCK
2340         # 4.2
2341         LIBCFS_SRC_STRSCPY_EXISTS
2342         LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK
2343         # 4.4
2344         LIBCFS_SRC_KSTRTOBOOL_FROM_USER
2345         LIBCFS_SRC_NETLINK_CALLBACK_START
2346         # 4.5
2347         LIBCFS_SRC_CRYPTO_HASH_HELPERS
2348         LIBCFS_SRC_RHASHTABLE_REPLACE
2349         # 4.6
2350         LIBCFS_SRC_BROKEN_HASH_64
2351         LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT
2352         LIBCFS_SRC_GET_USER_PAGES_6ARG
2353         # 4.7
2354         LIBCFS_SRC_RHASHTABLE_INSERT_FAST
2355         LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG
2356         # 4.8
2357         LIBCFS_SRC_RHASHTABLE_LOOKUP
2358         LIBCFS_SRC_RHLTABLE
2359         LIBCFS_SRC_STACKTRACE_OPS
2360         # 4.9
2361         LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS
2362         LIBCFS_SRC_RHASHTABLE_WALK_ENTER
2363         # 4.10
2364         LIBCFS_SRC_HOTPLUG_STATE_MACHINE
2365         # 4.11
2366         LIBCFS_SRC_NL_EXT_ACK
2367         LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2368         LIBCFS_SRC_KREF_READ
2369         LIBCFS_SRC_RHT_BUCKET_VAR
2370         # 4.12
2371         LIBCFS_SRC_CPUS_READ_LOCK
2372         LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME
2373         LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS
2374         LIBCFS_SRC_MEMALLOC_NORECLAIM
2375         # 4.13
2376         LIBCFS_SRC_NLA_STRDUP
2377         LIBCFS_SRC_WAIT_QUEUE_ENTRY
2378         # 4.14
2379         LIBCFS_SRC_DEFINE_TIMER
2380         LIBCFS_SRC_NEW_KERNEL_WRITE
2381         LIBCFS_SRC_NEW_KERNEL_READ
2382         # 4.15
2383         LIBCFS_SRC_LOCKDEP_IS_HELD
2384         LIBCFS_SRC_TIMER_SETUP
2385         # 4.16
2386         LIBCFS_SRC_HAVE_NS_TO_TIMESPEC64
2387         LIBCFS_SRC_WAIT_VAR_EVENT
2388         # 4.17
2389         LIBCFS_SRC_BITMAP_ALLOC
2390         LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT
2391         # 4.18
2392         LIBCFS_SRC_TCP_SOCK_SET_NODELAY
2393         LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE
2394         # 4.19
2395         LIBCFS_SRC_XARRAY_SUPPORT
2396         LIBCFS_SRC_NL_DUMP_EXT_ACK
2397         # 4.20
2398         LIBCFS_SRC_HAVE_IOV_ITER_TYPE
2399         # 5.0
2400         LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC
2401         LIBCFS_SRC_GET_REQUEST_KEY_AUTH
2402         # 5.2
2403         LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS
2404         # 5.3
2405         LIBCFS_SRC_LOOKUP_USER_KEY
2406         LIBCFS_SRC_FORCE_SIG_WITH_TASK
2407         LIBCFS_SRC_CACHE_DETAIL_WRITERS
2408         # 5.4
2409         LIBCFS_SRC_GENL_DUMPIT_INFO
2410         # 5.6
2411         LIBCFS_SRC_HAVE_PROC_OPS
2412         # 5.7
2413         LIBCFS_SRC_TCP_SOCK_SET_QUICKACK
2414         LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL
2415         LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT
2416         # 5.8
2417         LIBCFS_SRC_IP6_SET_PREF
2418         LIBCFS_SRC_VMALLOC_2ARGS
2419         LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS
2420         LIBCFS_SRC_HAVE_MMAP_LOCK
2421         LIBCFS_SRC_KERNEL_SETSOCKOPT
2422         LIBCFS_SRC_KEY_NEED_UNLINK
2423         LIBCFS_SRC_SEC_RELEASE_SECCTX
2424         # 5.10
2425         LIBCFS_SRC_HAVE_KFREE_SENSITIVE
2426         LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T
2427         LIBCFS_SRC_NLA_STRLCPY
2428         # 5.12
2429         LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER
2430         # 5.13
2431         LIBCFS_SRC_HAVE_TASK_IS_RUNNING
2432         # 5.15
2433         LIBCFS_SRC_PARAM_SET_UINT_MINMAX
2434         # 5.17
2435         LIBCFS_SRC_PDE_DATA_EXISTS
2436         LIBCFS_SRC_BIO_ALLOC_WITH_BDEV
2437         # 6.2
2438         LIBCFS_SRC_TIMER_DELETE_SYNC
2439         LIBCFS_SRC_TIMER_DELETE
2440
2441         LB2_LINUX_TEST_COMPILE_ALL([libcfs],
2442                 [for available kernel interfaces to libcfs])
2443 ])
2444
2445 dnl #
2446 dnl # Check results of kernel interface tests.
2447 dnl #
2448 AC_DEFUN([LIBCFS_PROG_LINUX_RESULTS], [
2449         # 3.11
2450         LIBCFS_KTIME_GET_TS64
2451         # 3.12
2452         LIBCFS_PREPARE_TO_WAIT_EVENT
2453         LIBCFS_KERNEL_PARAM_OPS
2454         LIBCFS_KTIME_ADD
2455         LIBCFS_KTIME_AFTER
2456         LIBCFS_KTIME_BEFORE
2457         LIBCFS_KTIME_COMPARE
2458         LIBCFS_SHRINKER_COUNT
2459         # 3.13
2460         LIBCFS_MATCH_WILDCARD
2461         # 3.14
2462         LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
2463         # 3.15
2464         LIBCFS_IOV_ITER_HAS_TYPE
2465         # 3.16
2466         LIBCFS_HAVE_GLOB
2467         # 3.17
2468         LIBCFS_HLIST_ADD_AFTER
2469         LIBCFS_TIMESPEC64
2470         LIBCFS_KTIME_GET_NS
2471         LIBCFS_KTIME_GET_REAL_TS64
2472         LIBCFS_KTIME_GET_REAL_SECONDS
2473         LIBCFS_KTIME_GET_REAL_NS
2474         LIBCFS_KTIME_TO_TIMESPEC64
2475         LIBCFS_TIMESPEC64_SUB
2476         LIBCFS_TIMESPEC64_TO_KTIME
2477         # 3.19
2478         LIBCFS_KTIME_GET_SECONDS
2479         LIBCFS_WAIT_WOKEN
2480         # 4.0
2481         LIBCFS_KTIME_MS_DELTA
2482         # 4.1
2483         LIBCFS_KERNEL_PARAM_LOCK
2484         # 4.2
2485         LIBCFS_STRSCPY_EXISTS
2486         LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
2487         # 4.4
2488         LIBCFS_KSTRTOBOOL_FROM_USER
2489         LIBCFS_NETLINK_CALLBACK_START
2490         # 4.5
2491         LIBCFS_CRYPTO_HASH_HELPERS
2492         LIBCFS_RHASHTABLE_REPLACE
2493         # 4.6
2494         LIBCFS_BROKEN_HASH_64
2495         LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
2496         LIBCFS_GET_USER_PAGES_6ARG
2497         # 4.7
2498         LIBCFS_RHASHTABLE_INSERT_FAST
2499         LIBCFS_RHASHTABLE_WALK_INIT_3ARG
2500         # 4.8
2501         LIBCFS_RHASHTABLE_LOOKUP
2502         LIBCFS_RHLTABLE
2503         LIBCFS_STACKTRACE_OPS
2504         # 4.9
2505         LIBCFS_GET_USER_PAGES_GUP_FLAGS
2506         LIBCFS_RHASHTABLE_WALK_ENTER
2507         # 4.10
2508         LIBCFS_HOTPLUG_STATE_MACHINE
2509         # 4.11
2510         LIBCFS_NL_EXT_ACK
2511         LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2512         LIBCFS_KREF_READ
2513         LIBCFS_RHT_BUCKET_VAR
2514         # 4.12
2515         LIBCFS_CPUS_READ_LOCK
2516         LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
2517         LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
2518         LIBCFS_MEMALLOC_NORECLAIM
2519         # 4.13
2520         LIBCFS_NLA_STRDUP
2521         LIBCFS_WAIT_QUEUE_ENTRY
2522         # 4.14
2523         LIBCFS_DEFINE_TIMER
2524         LIBCFS_NEW_KERNEL_WRITE
2525         LIBCFS_NEW_KERNEL_READ
2526         # 4.15
2527         LIBCFS_LOCKDEP_IS_HELD
2528         LIBCFS_TIMER_SETUP
2529         # 4.16
2530         LIBCFS_HAVE_NS_TO_TIMESPEC64
2531         LIBCFS_WAIT_VAR_EVENT
2532         # 4.17
2533         LIBCFS_BITMAP_ALLOC
2534         LIBCFS_CLEAR_AND_WAKE_UP_BIT
2535         # 4.18
2536         LIBCFS_TCP_SOCK_SET_NODELAY
2537         LIBCFS_TCP_SOCK_SET_KEEPIDLE
2538         # 4.19
2539         LIBCFS_XARRAY_SUPPORT
2540         LIBCFS_NL_DUMP_EXT_ACK
2541         # 4.20
2542         LIBCFS_HAVE_IOV_ITER_TYPE
2543         # 5.0
2544         LIBCFS_MM_TOTALRAM_PAGES_FUNC
2545         LIBCFS_GET_REQUEST_KEY_AUTH
2546         # 5.2
2547         LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
2548         # 5.3
2549         LIBCFS_LOOKUP_USER_KEY
2550         LIBCFS_FORCE_SIG_WITH_TASK
2551         LIBCFS_CACHE_DETAIL_WRITERS
2552         # 5.4
2553         LIBCFS_GENL_DUMPIT_INFO
2554         # 5.6
2555         LIBCFS_HAVE_PROC_OPS
2556         # 5.7
2557         LIBCFS_TCP_SOCK_SET_QUICKACK
2558         LIBCFS_TCP_SOCK_SET_KEEPINTVL
2559         LIBCFS_TCP_SOCK_SET_KEEPCNT
2560         # 5.8
2561         LIBCFS_IP6_SET_PREF
2562         LIBCFS_VMALLOC_2ARGS
2563         LIBCFS_HAVE_NR_UNSTABLE_NFS
2564         LIBCFS_HAVE_MMAP_LOCK
2565         LIBCFS_KERNEL_SETSOCKOPT
2566         LIBCFS_KEY_NEED_UNLINK
2567         LIBCFS_SEC_RELEASE_SECCTX
2568         # 5.10
2569         LIBCFS_HAVE_KFREE_SENSITIVE
2570         LIBCFS_HAVE_LIST_CMP_FUNC_T
2571         LIBCFS_NLA_STRLCPY
2572         # 5.12
2573         LIBCFS_LINUX_FORTIFY_STRING_HEADER
2574         # 5.13
2575         LIBCFS_HAVE_TASK_IS_RUNNING
2576         # 5.15
2577         LIBCFS_PARAM_SET_UINT_MINMAX
2578         # 5.17
2579         LIBCFS_PDE_DATA_EXISTS
2580         LIBCFS_BIO_ALLOC_WITH_BDEV
2581         # 6.2
2582         LIBCFS_TIMER_DELETE_SYNC
2583         LIBCFS_TIMER_DELETE
2584 ])
2585
2586 #
2587 # LIBCFS_PROG_LINUX
2588 #
2589 # LibCFS linux kernel checks
2590 #
2591 AC_DEFUN([LIBCFS_PROG_LINUX], [
2592 AC_MSG_NOTICE([LibCFS kernel checks
2593 ==============================================================================])
2594 LIBCFS_CONFIG_PANIC_DUMPLOG
2595
2596 # 4.6 - Header Check
2597 LIBCFS_STRINGHASH
2598 # 4.6 - Export Check
2599 LIBCFS_EXPORT_KSET_FIND_OBJ
2600 # 4.10 - Header Check
2601 LIBCFS_REFCOUNT_T
2602 # 4.11 - Header Check
2603 LIBCFS_SCHED_HEADERS
2604 # 4.13 - Header Checks
2605 LIBCFS_HAVE_PROCESSOR_HEADER
2606 LIBCFS_HAVE_WAIT_BIT_HEADER
2607 # 4.13 - Export Check
2608 LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
2609 # 5.0 - Header Check
2610 LIBCFS_GENRADIX
2611 # 5.7 - Export Check and Header Check
2612 LIBCFS_KALLSYMS_LOOKUP
2613 LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2614 # 5.12 - Header Check
2615 LIBCFS_HAVE_CIPHER_HEADER
2616 # 5.14 - Header Checks
2617 LIBCFS_LINUX_STDARG_HEADER
2618 LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2619 # 5.15 - Header Check
2620 LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2621 ]) # LIBCFS_PROG_LINUX
2622
2623 #
2624 # LIBCFS_PATH_DEFAULTS
2625 #
2626 # default paths for installed files
2627 #
2628 AC_DEFUN([LIBCFS_PATH_DEFAULTS], [
2629 ]) # LIBCFS_PATH_DEFAULTS
2630
2631 #
2632 # LIBCFS_CONFIGURE
2633 #
2634 # other configure checks
2635 #
2636 AC_DEFUN([LIBCFS_CONFIGURE], [
2637 AC_MSG_NOTICE([LibCFS core checks
2638 ==============================================================================])
2639
2640 # libcfs/libcfs/util/nidstrings.c
2641 AC_CHECK_HEADERS([netdb.h asm/types.h endian.h])
2642 AC_CHECK_FUNCS([gethostbyname])
2643 AC_CHECK_FUNCS([getaddrinfo])
2644
2645 # --------  Check for required packages  --------------
2646
2647 AC_MSG_NOTICE([LibCFS required packages checks
2648 ==============================================================================])
2649
2650 AC_MSG_CHECKING([whether to enable readline support])
2651 AC_ARG_ENABLE(readline,
2652         AS_HELP_STRING([--disable-readline],
2653                 [disable readline support]),
2654         [], [enable_readline="yes"])
2655 AC_MSG_RESULT([$enable_readline])
2656
2657 LIBREADLINE=""
2658 AS_IF([test "x$enable_readline" = xyes], [
2659         AC_CHECK_LIB([readline], [readline], [
2660                 LIBREADLINE="-lreadline"
2661                 AC_DEFINE(HAVE_LIBREADLINE, 1,
2662                         [readline library is available])
2663         ])
2664 ])
2665 AC_SUBST(LIBREADLINE)
2666
2667 AC_MSG_CHECKING([whether to use libpthread for libcfs library])
2668 AC_ARG_ENABLE([libpthread],
2669         AS_HELP_STRING([--disable-libpthread],
2670                 [disable libpthread]),
2671         [], [enable_libpthread="yes"])
2672 AC_MSG_RESULT([$enable_libpthread])
2673
2674 PTHREAD_LIBS=""
2675 AS_IF([test "x$enable_libpthread" = xyes], [
2676         AC_CHECK_LIB([pthread], [pthread_create], [
2677                 PTHREAD_LIBS="-lpthread"
2678                 AC_DEFINE([HAVE_LIBPTHREAD], 1,
2679                         [use libpthread for libcfs library])
2680         ])
2681 ], [
2682         AC_MSG_WARN([Using libpthread for libcfs library is disabled explicitly])
2683 ])
2684 AC_SUBST(PTHREAD_LIBS)
2685 ]) # LIBCFS_CONFIGURE
2686
2687 #
2688 # LIBCFS_CONFIG_FILES
2689 #
2690 # files that should be generated with AC_OUTPUT
2691 #
2692 AC_DEFUN([LIBCFS_CONFIG_FILES], [
2693 AC_CONFIG_FILES([
2694 libcfs/Makefile
2695 libcfs/autoMakefile
2696 libcfs/autoconf/Makefile
2697 libcfs/include/Makefile
2698 libcfs/include/libcfs/Makefile
2699 libcfs/include/uapi/Makefile
2700 libcfs/include/libcfs/linux/Makefile
2701 libcfs/include/libcfs/util/Makefile
2702 libcfs/include/libcfs/crypto/Makefile
2703 libcfs/include/uapi/linux/Makefile
2704 libcfs/libcfs/Makefile
2705 libcfs/libcfs/autoMakefile
2706 libcfs/libcfs/linux/Makefile
2707 libcfs/libcfs/util/Makefile
2708 libcfs/libcfs/crypto/Makefile
2709 ])
2710 ]) # LIBCFS_CONFIG_FILES