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 f9727a17db9bab71ddae91f74f11a8a2f9a0ece6
1134 # renamed uuid_be to uuid_t
1135 #
1136 AC_DEFUN([LIBCFS_SRC_UUID_T], [
1137         LB2_LINUX_TEST_SRC([uuid_t], [
1138                 #include <linux/uuid.h>
1139         ],[
1140                 uuid_t uuid;
1141
1142                 memset(uuid.b, 0, 16);
1143         ])
1144 ])
1145 AC_DEFUN([LIBCFS_UUID_T], [
1146         AC_MSG_CHECKING([if 'uuid_t' exist])
1147         LB2_LINUX_TEST_RESULT([uuid_t], [
1148                 AC_DEFINE(HAVE_UUID_T, 1, ['uuid_t' exist])
1149         ])
1150 ]) # LIBCFS_UUID_T
1151
1152 #
1153 # Kernel version 4.12-rc3 commit fd851a3cdc196bfc1d229b5f22369069af532bf8
1154 # introduce processor.h
1155 #
1156 AC_DEFUN([LIBCFS_HAVE_PROCESSOR_HEADER], [
1157 tmp_flags="$EXTRA_KCFLAGS"
1158 EXTRA_KCFLAGS="-Werror"
1159 LB_CHECK_LINUX_HEADER([linux/processor.h], [
1160         AC_DEFINE(HAVE_PROCESSOR_H, 1,
1161                 [processor.h is present])
1162 ])
1163 EXTRA_KCFLAGS="$tmp_flags"
1164 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
1165
1166 #
1167 # Kernel verison 4.12-rc6 commit 5dd43ce2f69d42a71dcacdb13d17d8c0ac1fe8f7
1168 # created wait_bit.h
1169 #
1170 AC_DEFUN([LIBCFS_HAVE_WAIT_BIT_HEADER], [
1171 LB_CHECK_LINUX_HEADER([linux/wait_bit.h], [
1172         AC_DEFINE(HAVE_WAIT_BIT_HEADER_H, 1,
1173                 [wait_bit.h is present])])
1174 ]) # LIBCFS_HAVE_WAIT_BIT_HEADER
1175
1176 #
1177 # Kernel version 4.12-rc6 commmit 2055da97389a605c8a00d163d40903afbe413921
1178 # changed:
1179 #       struct wait_queue_head::task_list       => ::head
1180 #       struct wait_queue_entry::task_list      => ::entry
1181 #
1182 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME], [
1183         LB2_LINUX_TEST_SRC([wait_queue_task_list], [
1184                 #include <linux/wait.h>
1185         ],[
1186                 wait_queue_head_t e;
1187
1188                 INIT_LIST_HEAD(&e.head);
1189         ])
1190 ])
1191 AC_DEFUN([LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME], [
1192         AC_MSG_CHECKING([if linux wait_queue_head list_head is named head])
1193         LB2_LINUX_TEST_RESULT([wait_queue_task_list], [
1194                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_LIST, 1,
1195                         [linux wait_queue_head_t list_head is name head])
1196         ])
1197 ]) # LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
1198
1199 #
1200 # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1201 #
1202 # Kernel version v4.12-rc6-23-g76c85ddc4695
1203 # sched/wait: Standardize wait_bit_queue naming
1204 #
1205 # renamed struct wait_bit_queue  => wait_bit_queue_entry
1206 #
1207 AC_DEFUN([LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1208         LB2_LINUX_TEST_SRC([struct_wait_bit_queue_entry_exists], [
1209                 #include <linux/wait.h>
1210                 #if HAVE_WAIT_BIT_HEADER_H
1211                         #include <linux/wait_bit.h>
1212                 #endif
1213         ],[
1214                 struct wait_bit_queue_entry entry;
1215                 memset(&entry, 0, sizeof(entry));
1216         ])
1217 ])
1218 AC_DEFUN([LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS], [
1219         AC_MSG_CHECKING([if struct wait_bit_queue_entry exists])
1220         LB2_LINUX_TEST_RESULT([struct_wait_bit_queue_entry_exists], [
1221                 AC_DEFINE(HAVE_WAIT_BIT_QUEUE_ENTRY, 1,
1222                         [if struct wait_bit_queue_entry exists])
1223         ])
1224 ]) # LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
1225
1226 #
1227 # LIBCFS_NLA_STRDUP
1228 #
1229 # Kernel version 4.13-rc1 commit 2cf0c8b3e6942ecafe6ebb1a6d0328a81641bf39
1230 # created nla_strdup(). This is needed since push strings can be
1231 # any size.
1232 #
1233 AC_DEFUN([LIBCFS_SRC_NLA_STRDUP], [
1234         LB2_LINUX_TEST_SRC([nla_strdup], [
1235                 #include <net/netlink.h>
1236         ],[
1237                 char *tmp = nla_strdup(NULL, GFP_KERNEL);
1238                 (void)tmp;
1239         ],[])
1240 ])
1241 AC_DEFUN([LIBCFS_NLA_STRDUP], [
1242         AC_MSG_CHECKING([if 'nla_strdup()' exists])
1243         LB2_LINUX_TEST_RESULT([nla_strdup], [
1244                 AC_DEFINE(HAVE_NLA_STRDUP, 1,
1245                         ['nla_strdup' is available])
1246         ])
1247 ]) # LIBCFS_NLA_STRDUP
1248
1249 #
1250 # LIBCFS_WAIT_QUEUE_ENTRY
1251 #
1252 # Kernel version 4.13 ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f
1253 # Rename wait_queue_t => wait_queue_entry_t
1254 #
1255 AC_DEFUN([LIBCFS_SRC_WAIT_QUEUE_ENTRY], [
1256         LB2_LINUX_TEST_SRC([wait_queue_entry], [
1257                 #include <linux/wait.h>
1258         ],[
1259                 wait_queue_entry_t e;
1260
1261                 e.flags = 0;
1262         ])
1263 ])
1264 AC_DEFUN([LIBCFS_WAIT_QUEUE_ENTRY], [
1265         AC_MSG_CHECKING([if 'wait_queue_entry_t' exists])
1266         LB2_LINUX_TEST_RESULT([wait_queue_entry], [
1267                 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY, 1,
1268                         ['wait_queue_entry_t' is available])
1269         ])
1270 ]) # LIBCFS_WAIT_QUEUE_ENTRY
1271
1272 #
1273 # LIBCFS_NEW_KERNEL_WRITE
1274 #
1275 # Kernel version 4.14 e13ec939e96b13e664bb6cee361cc976a0ee621a
1276 # changed kernel_write prototype to make is plug compatible
1277 # with the unexported vfs_write()
1278 #
1279 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_WRITE], [
1280         LB2_LINUX_TEST_SRC([kernel_write_match], [
1281                 #include <linux/fs.h>
1282         ],[
1283                 const void *buf = NULL;
1284                 loff_t pos = 0;
1285                 return kernel_write(NULL, buf, 0, &pos);
1286         ],[-Werror])
1287 ])
1288 AC_DEFUN([LIBCFS_NEW_KERNEL_WRITE], [
1289         AC_MSG_CHECKING([if 'kernel_write' matches other read/write helpers])
1290         LB2_LINUX_TEST_RESULT([kernel_write_match], [
1291                 AC_DEFINE(HAVE_NEW_KERNEL_WRITE, 1,
1292                         ['kernel_write' aligns with read/write helpers])
1293         ])
1294 ]) # LIBCFS_NEW_KERNEL_WRITE
1295
1296 #
1297 # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1298 #
1299 # kernel 5.0 commit ca79b0c211af63fa3276f0e3fd7dd9ada2439839
1300 # mm: convert totalram_pages and totalhigh_pages variables to atomic
1301 #
1302 AC_DEFUN([LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC], [
1303         LB2_LINUX_TEST_SRC([totalram_pages], [
1304                 #include <linux/mm.h>
1305         ],[
1306                 totalram_pages_inc();
1307         ],[-Werror])
1308 ])
1309 AC_DEFUN([LIBCFS_MM_TOTALRAM_PAGES_FUNC], [
1310         AC_MSG_CHECKING([if totalram_pages is a function])
1311         LB2_LINUX_TEST_RESULT([totalram_pages], [
1312                 AC_DEFINE(HAVE_TOTALRAM_PAGES_AS_FUNC, 1,
1313                         [if totalram_pages is a function])
1314         ])
1315 ]) # LIBCFS_MM_TOTALRAM_PAGES_FUNC
1316
1317 #
1318 # LIBCFS_NEW_KERNEL_READ
1319 #
1320 # 4.14 commit bdd1d2d3d251c65b74ac4493e08db18971c09240 changed
1321 # the signature of kernel_read to match other read/write helpers
1322 # and place offset last.
1323 #
1324 AC_DEFUN([LIBCFS_SRC_NEW_KERNEL_READ], [
1325         LB2_LINUX_TEST_SRC([kernel_read], [
1326                 #include <linux/fs.h>
1327         ],[
1328                 loff_t pos = 0;
1329                 kernel_read(NULL, NULL, 0, &pos);
1330         ],[-Werror])
1331 ])
1332 AC_DEFUN([LIBCFS_NEW_KERNEL_READ], [
1333         AC_MSG_CHECKING([if 'kernel_read()' has loff_t *pos as last parameter])
1334         LB2_LINUX_TEST_RESULT([kernel_read], [
1335                 AC_DEFINE(HAVE_KERNEL_READ_LAST_POSP, 1,
1336                         [kernel_read() signature ends with loff_t *pos])
1337         ])
1338 ]) # LIBCFS_NEW_KERNEL_READ
1339
1340 #
1341 # LIBCFS_DEFINE_TIMER
1342 #
1343 # Kernel version 4.14 commit 1d27e3e2252ba9d949ca82fbdb73cde102cb2067
1344 # remove expires and data arguments from DEFINE_TIMER. Also the callback
1345 # when from using unsigned long argument to using struct timer_list pointer.
1346 #
1347 AC_DEFUN([LIBCFS_SRC_DEFINE_TIMER], [
1348         LB2_LINUX_TEST_SRC([define_timer], [
1349                 #include <linux/timer.h>
1350         ],[
1351                 static DEFINE_TIMER(my_timer, NULL);
1352         ])
1353 ])
1354 AC_DEFUN([LIBCFS_DEFINE_TIMER], [
1355         AC_MSG_CHECKING([if DEFINE_TIMER takes only 2 arguments])
1356         LB2_LINUX_TEST_RESULT([define_timer], [
1357                 AC_DEFINE(HAVE_NEW_DEFINE_TIMER, 1,
1358                         [DEFINE_TIMER uses only 2 arguements])
1359         ])
1360 ]) # LIBCFS_DEFINE_TIMER
1361
1362 #
1363 # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1364 #
1365 # Kernel 2.6.27 commit 8594698ebddeef5443b7da8258ae33b3eaca61d5
1366 # exported save_stack_trace_tsk for x86.
1367 # Kernel 2.6.27 commit 01f4b8b8b8db09b88be7df7e51192e4e678b69d3
1368 # exported save_stack_trace_tsk for powerpc
1369 # Kernel 4.13 commit e27c7fa015d61c8be6a2c32b2144aad2ae6ec975
1370 # exported save_stack_trace_tsk for arm64
1371 # Kernel 4.14 commit 9a3dc3186fc3795e076a4122da9e0258651a9631
1372 # exported save_stack_trace_tsk for arm
1373 #
1374 AC_DEFUN([LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK], [
1375 LB_CHECK_EXPORT([save_stack_trace_tsk], [arch/$SUBARCH/kernel/stacktrace.c],
1376         [AC_DEFINE(HAVE_SAVE_STACK_TRACE_TSK, 1,
1377                 [save_stack_trace_tsk is exported])])
1378 ]) # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1379
1380 #
1381 # LIBCFS_LOCKDEP_IS_HELD
1382 #
1383 # Kernel v4.15-rc8-106-g08f36ff64234
1384 # lockdep: Make lockdep checking constant
1385 #
1386 AC_DEFUN([LIBCFS_SRC_LOCKDEP_IS_HELD], [
1387         LB2_LINUX_TEST_SRC([lockdep_is_held], [
1388                 #include <linux/lockdep.h>
1389         ],[
1390         #ifdef CONFIG_LOCKDEP
1391                 const struct spinlock *lock = NULL;
1392
1393                 lockdep_is_held(lock);
1394         #endif
1395         ],[-Werror])
1396 ])
1397 AC_DEFUN([LIBCFS_LOCKDEP_IS_HELD], [
1398         AC_MSG_CHECKING([if 'lockdep_is_held()' uses const argument])
1399         LB2_LINUX_TEST_RESULT([lockdep_is_held], [],[
1400                 AC_DEFINE(NEED_LOCKDEP_IS_HELD_DISCARD_CONST, 1,
1401                         [lockdep_is_held() argument is const])
1402         ])
1403 ]) # LIBCFS_LOCKDEP_IS_HELD
1404
1405 #
1406 # LIBCFS_TIMER_SETUP
1407 #
1408 # Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
1409 # setup_timer() was replaced by timer_setup(), where the callback
1410 # argument is the structure already holding the struct timer_list.
1411 #
1412 AC_DEFUN([LIBCFS_SRC_TIMER_SETUP], [
1413         LB2_LINUX_TEST_SRC([timer_setup], [
1414                 #include <linux/timer.h>
1415         ],[
1416                 timer_setup(NULL, NULL, 0);
1417         ])
1418 ])
1419 AC_DEFUN([LIBCFS_TIMER_SETUP], [
1420         AC_MSG_CHECKING([if setup_timer has been replaced with timer_setup])
1421         LB2_LINUX_TEST_RESULT([timer_setup], [
1422                 AC_DEFINE(HAVE_TIMER_SETUP, 1,
1423                         [timer_setup has replaced setup_timer])
1424         ])
1425 ]) # LIBCFS_TIMER_SETUP
1426
1427 #
1428 # LIBCFS_WAIT_VAR_EVENT
1429 #
1430 # Kernel version 4.16-rc4 commit 6b2bb7265f0b62605e8caee3613449ed0db270b9
1431 # added wait_var_event()
1432 #
1433 AC_DEFUN([LIBCFS_SRC_WAIT_VAR_EVENT], [
1434         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1435                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1436         else
1437                 WAIT_BIT_H=""
1438         fi
1439         LB2_LINUX_TEST_SRC([wait_var_event], [
1440                 #ifdef HAVE_WAIT_BIT_HEADER_H
1441                 #include <linux/wait_bit.h>
1442                 #endif
1443                 #include <linux/wait.h>
1444         ],[
1445                 wake_up_var(NULL);
1446         ],[${WAIT_BIT_H}])
1447 ])
1448 AC_DEFUN([LIBCFS_WAIT_VAR_EVENT], [
1449         AC_MSG_CHECKING([if 'wait_var_event' exist])
1450         LB2_LINUX_TEST_RESULT([wait_var_event], [
1451                 AC_DEFINE(HAVE_WAIT_VAR_EVENT, 1,
1452                         ['wait_var_event' is available])
1453         ])
1454 ]) # LIBCFS_WAIT_VAR_EVENT
1455
1456 #
1457 # LIBCFS_BITMAP_ALLOC
1458 #
1459 # Kernel version 4.17 commit c42b65e363ce97a828f81b59033c3558f8fa7f70
1460 # added bitmap memory allocation handling.
1461 #
1462 AC_DEFUN([LIBCFS_SRC_BITMAP_ALLOC], [
1463         LB2_LINUX_TEST_SRC([bitmap_alloc], [
1464                 #include <linux/bitmap.h>
1465         ],[
1466                 unsigned long *map = bitmap_alloc(1, GFP_KERNEL);
1467                 (void)map;
1468         ])
1469 ])
1470 AC_DEFUN([LIBCFS_BITMAP_ALLOC], [
1471         AC_MSG_CHECKING([if Linux bitmap memory management exist])
1472         LB2_LINUX_TEST_RESULT([bitmap_alloc], [
1473                 AC_DEFINE(HAVE_BITMAP_ALLOC, 1,
1474                         [Linux bitmap can be allocated])
1475         ])
1476 ]) # LIBCFS_BITMAP_ALLOC
1477
1478 #
1479 # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1480 #
1481 # Kernel version 4.17-rc2 commit 8236b0ae31c837d2b3a2565c5f8d77f637e824cc
1482 # added clear_and_wake_up_bit()
1483 #
1484 AC_DEFUN([LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT], [
1485         if test "x$lb_cv_header_linux_wait_bit_h" = xyes; then
1486                 WAIT_BIT_H="-DHAVE_WAIT_BIT_HEADER_H=1"
1487         else
1488                 WAIT_BIT_H=""
1489         fi
1490         LB2_LINUX_TEST_SRC([clear_and_wake_up_bit], [
1491                 #ifdef HAVE_WAIT_BIT_HEADER_H
1492                 #include <linux/wait_bit.h>
1493                 #endif
1494                 #include <linux/wait.h>
1495         ],[
1496                 clear_and_wake_up_bit(0, NULL);
1497         ],[${WAIT_BIT_H}])
1498 ])
1499 AC_DEFUN([LIBCFS_CLEAR_AND_WAKE_UP_BIT], [
1500         AC_MSG_CHECKING([if 'clear_and_wake_up_bit' exist])
1501         LB2_LINUX_TEST_RESULT([clear_and_wake_up_bit], [
1502                 AC_DEFINE(HAVE_CLEAR_AND_WAKE_UP_BIT, 1,
1503                         ['clear_and_wake_up_bit' is available])
1504         ])
1505 ]) # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1506
1507 #
1508 # LIBCFS_TCP_SOCK_SET_NODELAY
1509 #
1510 # kernel 4.18.0-293.el8
1511 # tcp_sock_set_nodelay() was added
1512 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_NODELAY], [
1513         LB2_LINUX_TEST_SRC([tcp_sock_set_nodelay_exists], [
1514                 #include <linux/tcp.h>
1515         ],[
1516                 tcp_sock_set_nodelay(NULL);
1517         ],[-Werror])
1518 ])
1519 AC_DEFUN([LIBCFS_TCP_SOCK_SET_NODELAY], [
1520         AC_MSG_CHECKING([if 'tcp_sock_set_nodelay()' exists])
1521         LB2_LINUX_TEST_RESULT([tcp_sock_set_nodelay_exists], [
1522                 AC_DEFINE(HAVE_TCP_SOCK_SET_NODELAY, 1,
1523                         ['tcp_sock_set_nodelay()' exists])
1524         ])
1525 ]) # LIBCFS_TCP_SOCK_SET_NODELAY
1526
1527 #
1528 # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1529 #
1530 # kernel 4.18.0-293.el8
1531 # tcp_sock_set_keepidle() was added
1532 #
1533 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE], [
1534         LB2_LINUX_TEST_SRC([tcp_sock_set_keepidle_exists], [
1535                 #include <linux/tcp.h>
1536         ],[
1537                 tcp_sock_set_keepidle(NULL, 0);
1538         ],[-Werror])
1539 ])
1540 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPIDLE], [
1541         AC_MSG_CHECKING([if 'tcp_sock_set_keepidle()' exists])
1542         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepidle_exists], [
1543                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPIDLE, 1,
1544                         ['tcp_sock_set_keepidle()' exists])
1545         ])
1546 ]) # LIBCFS_TCP_SOCK_SET_KEEPIDLE
1547
1548 #
1549 # LIBCFS_TCP_SOCK_SET_QUICKACK
1550 # kernel v5.7-rc6-2504-gddd061b8daed
1551 #   tcp: add tcp_sock_set_quickack
1552 #
1553 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_QUICKACK], [
1554         LB2_LINUX_TEST_SRC([tcp_sock_set_quickack_exists], [
1555                 #include <linux/tcp.h>
1556         ],[
1557                 tcp_sock_set_quickack(NULL, 0);
1558         ],[-Werror])
1559 ])
1560 AC_DEFUN([LIBCFS_TCP_SOCK_SET_QUICKACK], [
1561         AC_MSG_CHECKING([if 'tcp_sock_set_quickack()' exists])
1562         LB2_LINUX_TEST_RESULT([tcp_sock_set_quickack_exists], [
1563                 AC_DEFINE(HAVE_TCP_SOCK_SET_QUICKACK, 1,
1564                         ['tcp_sock_set_quickack()' exists])
1565         ])
1566 ]) # LIBCFS_TCP_SOCK_SET_QUICKACK
1567
1568 #
1569 # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1570 # v5.7-rc6-2508-gd41ecaac903c
1571 # tcp: add tcp_sock_set_keepintvl
1572 #
1573 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL], [
1574         LB2_LINUX_TEST_SRC([tcp_sock_set_keepintvl_exists], [
1575                 #include <linux/tcp.h>
1576         ],[
1577                 tcp_sock_set_keepintvl(NULL, 0);
1578         ],[-Werror])
1579 ])
1580 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPINTVL], [
1581         AC_MSG_CHECKING([if 'tcp_sock_set_keepintvl()' exists])
1582         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepintvl_exists], [
1583                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPINTVL, 1,
1584                         ['tcp_sock_set_keepintvl()' exists])
1585         ])
1586 ]) # LIBCFS_TCP_SOCK_SET_KEEPINTVL
1587
1588 #
1589 # LIBCFS_TCP_SOCK_SET_KEEPCNT
1590 # v5.7-rc6-2509-g480aeb9639d6
1591 # tcp: add tcp_sock_set_keepcnt
1592 #
1593 AC_DEFUN([LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT], [
1594         LB2_LINUX_TEST_SRC([tcp_sock_set_keepcnt_exists], [
1595                 #include <linux/tcp.h>
1596         ],[
1597                 tcp_sock_set_keepcnt(NULL, 0);
1598         ],[-Werror])
1599 ])
1600 AC_DEFUN([LIBCFS_TCP_SOCK_SET_KEEPCNT], [
1601         AC_MSG_CHECKING([if 'tcp_sock_set_keepcnt()' exists])
1602         LB2_LINUX_TEST_RESULT([tcp_sock_set_keepcnt_exists], [
1603                 AC_DEFINE(HAVE_TCP_SOCK_SET_KEEPCNT, 1,
1604                         ['tcp_sock_set_keepcnt()' exists])
1605         ])
1606 ]) # LIBCFS_TCP_SOCK_SET_KEEPCNT
1607
1608 #
1609 # LIBCFS_XARRAY_SUPPORT
1610 #
1611 # 4.19-rc5 kernel commit 3159f943aafdbacb2f94c38fdaadabf2bbde2a14
1612 # replaced the radix tree implementation with Xarrays. This change
1613 # introduced functionaly needed for general Xarray support
1614 #
1615 AC_DEFUN([LIBCFS_SRC_XARRAY_SUPPORT], [
1616         LB2_LINUX_TEST_SRC([xarray_support], [
1617                 #include <linux/xarray.h>
1618         ],[
1619                 xa_is_value(NULL);
1620         ],[-Werror])
1621 ])
1622 AC_DEFUN([LIBCFS_XARRAY_SUPPORT], [
1623         AC_MSG_CHECKING([if page cache uses Xarray])
1624         LB2_LINUX_TEST_RESULT([xarray_support], [
1625                 AC_DEFINE(HAVE_XARRAY_SUPPORT, 1,
1626                         [kernel Xarray implementation lacks 'xa_is_value'])
1627         ])
1628 ]) # LIBCFS_XARRAY_SUPPORT
1629
1630 #
1631 # LIBCFS_NL_DUMP_EXT_ACK
1632 #
1633 # Kernel version 4.19-rc6 commit 4a19edb60d0203cd5bf95a8b46ea8f63fd41194c
1634 # added extended ACK handling to Netlink dump handlers
1635 #
1636 AC_DEFUN([LIBCFS_SRC_NL_DUMP_EXT_ACK], [
1637         LB2_LINUX_TEST_SRC([netlink_dump_ext_ack], [
1638                 #include <net/netlink.h>
1639         ],[
1640                 struct netlink_callback *cb = NULL;
1641                 cb->extack = NULL;
1642         ],[])
1643 ])
1644 AC_DEFUN([LIBCFS_NL_DUMP_EXT_ACK], [
1645         AC_MSG_CHECKING([if Netlink dump handlers support ext_ack])
1646         LB2_LINUX_TEST_RESULT([netlink_dump_ext_ack], [
1647                 AC_DEFINE(HAVE_NL_DUMP_WITH_EXT_ACK, 1,
1648                         [netlink_ext_ack is handled for Netlink dump handlers])
1649         ])
1650 ]) # LIBCFS_NL_DUMP_EXT_ACK
1651
1652 #
1653 # LIBCFS_HAVE_IOV_ITER_TYPE
1654 #
1655 # kernel 4.20 commit 00e23707442a75b404392cef1405ab4fd498de6b
1656 # iov_iter: Use accessor functions to access an iterator's type and direction.
1657 #
1658 AC_DEFUN([LIBCFS_SRC_HAVE_IOV_ITER_TYPE], [
1659         LB2_LINUX_TEST_SRC([macro_iov_iter_type_exists], [
1660                 #include <linux/uio.h>
1661         ],[
1662                 struct iov_iter iter = { };
1663                 enum iter_type type = iov_iter_type(&iter);
1664                 (void)type;
1665         ],[-Werror])
1666 ])
1667 AC_DEFUN([LIBCFS_HAVE_IOV_ITER_TYPE], [
1668         AC_MSG_CHECKING([if iov_iter_type exists])
1669         LB2_LINUX_TEST_RESULT([macro_iov_iter_type_exists], [
1670                 AC_DEFINE(HAVE_IOV_ITER_TYPE, 1,
1671                         [if iov_iter_type exists])
1672         ])
1673 ]) # LIBCFS_HAVE_IOV_ITER_TYPE
1674
1675 #
1676 # LIBCFS_GENRADIX
1677 #
1678 # Kernel 5.0 commit ba20ba2e3743bac786dff777954c11930256075e
1679 # implemented generic radix trees to handle very large memory
1680 # allocation that can be used instead of vmalloc which has
1681 # a performance penalty.
1682 #
1683 AC_DEFUN([LIBCFS_GENRADIX], [
1684 LB_CHECK_EXPORT([__genradix_ptr], [lib/generic-radix-tree.c],
1685         [AC_DEFINE(HAVE_GENRADIX_SUPPORT, 1,
1686                 [generic-radix-tree is present])])
1687 ]) # LIBCFS_GENRADIX
1688
1689 #
1690 # LIBCFS_GET_REQUEST_KEY_AUTH
1691 #
1692 # kernel 5.0 commit 822ad64d7e46a8e2c8b8a796738d7b657cbb146d
1693 # keys: Fix dependency loop between construction record and auth key
1694 #
1695 # Added <keys/request_key_auth-type.h> and get_request_key_auth()
1696 # which was propagated to stable
1697 #
1698 AC_DEFUN([LIBCFS_SRC_GET_REQUEST_KEY_AUTH], [
1699         LB2_LINUX_TEST_SRC([get_request_key_auth_exported], [
1700                 #include <linux/key.h>
1701                 #include <linux/keyctl.h>
1702                 #include <keys/request_key_auth-type.h>
1703         ],[
1704                 struct key *ring;
1705                 const struct key *key = NULL;
1706                 struct request_key_auth *rka = get_request_key_auth(key);
1707
1708                 ring = key_get(rka->dest_keyring);
1709         ],[-Werror])
1710 ])
1711 AC_DEFUN([LIBCFS_GET_REQUEST_KEY_AUTH], [
1712         AC_MSG_CHECKING([if get_request_key_auth() is available])
1713         LB2_LINUX_TEST_RESULT([get_request_key_auth_exported], [
1714                 AC_DEFINE(HAVE_GET_REQUEST_KEY_AUTH, 1,
1715                         [get_request_key_auth() is available])
1716         ])
1717 ]) # LIBCFS_GET_REQUEST_KEY_AUTH
1718
1719 #
1720 # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1721 #
1722 # Linux commit v5.1-rc3-29-gaa30f47cf666
1723 #    kobject: Add support for default attribute groups to kobj_type
1724 # Linux commit v5.18-rc1-2-gcdb4f26a63c3
1725 #    kobject: kobj_type: remove default_attrs
1726 #
1727 AC_DEFUN([LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS],[
1728         LB2_LINUX_TEST_SRC([kobj_type_default_groups], [
1729                 #include <linux/kobject.h>
1730         ],[
1731                 struct kobj_type *kobj_type = NULL;
1732                 void *has = kobj_type->default_groups;
1733                 (void) has;
1734         ])
1735 ])
1736 AC_DEFUN([LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS],[
1737         AC_MSG_CHECKING([does struct kobj_type have 'default_groups' member])
1738         LB2_LINUX_TEST_RESULT([kobj_type_default_groups], [
1739                 AC_DEFINE(HAVE_KOBJ_TYPE_DEFAULT_GROUPS, 1,
1740                         [struct kobj_type has 'default_groups' member])
1741         ])
1742 ]) # LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
1743
1744 #
1745 # LIBCFS_LOOKUP_USER_KEY
1746 #
1747 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1748 # signal: Remove task parameter from force_sig
1749 #
1750 AC_DEFUN([LIBCFS_SRC_LOOKUP_USER_KEY], [
1751         LB2_LINUX_TEST_SRC([lookup_user_key_exported], [
1752                 #include <linux/key.h>
1753                 #include <linux/keyctl.h>
1754         ],[
1755                 lookup_user_key(KEY_SPEC_USER_KEYRING, 0, 0);
1756         ],[-Werror])
1757 ])
1758 AC_DEFUN([LIBCFS_LOOKUP_USER_KEY], [
1759         AC_MSG_CHECKING([if lookup_user_key() is available])
1760         LB2_LINUX_TEST_RESULT([lookup_user_key_exported], [
1761                 AC_DEFINE(HAVE_LOOKUP_USER_KEY, 1,
1762                         [lookup_user_key() is available])
1763         ])
1764 ]) # LIBCFS_LOOKUP_USER_KEY
1765
1766 #
1767 # LIBCFS_FORCE_SIG_WITH_TASK
1768 #
1769 # kernel 5.3 commit 3cf5d076fb4d48979f382bc9452765bf8b79e740
1770 # signal: Remove task parameter from force_sig
1771 #
1772 AC_DEFUN([LIBCFS_SRC_FORCE_SIG_WITH_TASK], [
1773         LB2_LINUX_TEST_SRC([force_sig_with_task], [
1774                 #include <linux/sched/signal.h>
1775         ],[
1776                 force_sig(SIGINT, NULL);
1777         ],[-Werror])
1778 ])
1779 AC_DEFUN([LIBCFS_FORCE_SIG_WITH_TASK], [
1780         AC_MSG_CHECKING([if force_sig has task parameter])
1781         LB2_LINUX_TEST_RESULT([force_sig_with_task], [
1782                 AC_DEFINE(HAVE_FORCE_SIG_WITH_TASK, 1,
1783                         [force_sig() has task parameter])
1784         ])
1785 ]) # LIBCFS_FORCE_SIG_WITH_TASK
1786
1787 #
1788 # LIBCFS_CACHE_DETAIL_WRITERS
1789 #
1790 # kernel v5.3-rc2-1-g64a38e840ce5
1791 # SUNRPC: Track writers of the 'channel' file to improve cache_listeners_exist
1792 #
1793 AC_DEFUN([LIBCFS_SRC_CACHE_DETAIL_WRITERS], [
1794         LB2_LINUX_TEST_SRC([cache_detail_writers_atomic], [
1795                 #include <linux/sunrpc/cache.h>
1796
1797                 static struct cache_detail rsi_cache;
1798         ],[
1799                 atomic_set(&rsi_cache.writers, 0);
1800         ],[-Werror])
1801 ])
1802 AC_DEFUN([LIBCFS_CACHE_DETAIL_WRITERS], [
1803         AC_MSG_CHECKING([if struct cache_detail has writers])
1804         LB2_LINUX_TEST_RESULT([cache_detail_writers_atomic], [
1805                 AC_DEFINE(HAVE_CACHE_DETAIL_WRITERS, 1,
1806                         [struct cache_detail has writers])
1807         ])
1808 ]) # LIBCFS_CACHE_DETAIL_WRITERS
1809
1810 #
1811 # LIBCFS_GENL_DUMPIT_INFO
1812 #
1813 # kernel v5.4-rc1 commit bf813b0afeae2f012f0e527a526c1b78ca21ad82
1814 # expanded struct genl_dumpit_info to include struct genl_family.
1815 #
1816 AC_DEFUN([LIBCFS_SRC_GENL_DUMPIT_INFO], [
1817         LB2_LINUX_TEST_SRC([genl_dumpit_info], [
1818                 #include <net/genetlink.h>
1819         ],[
1820                 static struct genl_dumpit_info info;
1821
1822                 info.family = NULL;
1823         ],[-Werror])
1824 ])
1825 AC_DEFUN([LIBCFS_GENL_DUMPIT_INFO], [
1826         AC_MSG_CHECKING([if struct genl_dumpit_info has family field])
1827         LB2_LINUX_TEST_RESULT([genl_dumpit_info], [
1828                 AC_DEFINE(HAVE_GENL_DUMPIT_INFO, 1,
1829                         [struct genl_dumpit_info has family field])
1830         ])
1831 ]) # LIBCFS_GENL_DUMPIT_INFO
1832
1833 #
1834 # LIBCFS_KALLSYMS_LOOKUP
1835 #
1836 # kernel v5.6-11591-g0bd476e6c671
1837 # kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()
1838 AC_DEFUN([LIBCFS_KALLSYMS_LOOKUP], [
1839 LB_CHECK_EXPORT([kallsyms_lookup_name], [kernel/kallsyms.c],
1840         [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
1841                 [kallsyms_lookup_name is exported by kernel])])
1842 ]) # LIBCFS_KALLSYMS_LOOKUP
1843
1844 #
1845 # v5.5-8862-gd56c0d45f0e2
1846 # proc: decouple proc from VFS with "struct proc_ops"
1847 #
1848 AC_DEFUN([LIBCFS_SRC_HAVE_PROC_OPS], [
1849         LB2_LINUX_TEST_SRC([proc_ops], [
1850                 #include <linux/proc_fs.h>
1851
1852                 static struct proc_ops *my_proc;
1853         ],[
1854                 my_proc->proc_lseek = NULL;
1855         ],[-Werror])
1856 ]) # LIBCFS_SRC_HAVE_PROC_OPS
1857 AC_DEFUN([LIBCFS_HAVE_PROC_OPS], [
1858         AC_MSG_CHECKING([if struct proc_ops exists])
1859         LB2_LINUX_TEST_RESULT([proc_ops], [
1860                 AC_DEFINE(HAVE_PROC_OPS, 1,
1861                         [struct proc_ops exists])
1862         ])
1863 ]) # LIBCFS_HAVE_PROC_OPS
1864
1865 #
1866 # LIBCFS_IP6_SET_PREF
1867 #
1868 # kernel v5.8-rc1~165^2~71^2~3 commit 18d5ad62327576cbb1e5b9938a59d63ac0c15832
1869 # ipv6: add ip6_sock_set_addr_preferences
1870 #
1871 AC_DEFUN([LIBCFS_SRC_IP6_SET_PREF], [
1872         LB2_LINUX_TEST_SRC([ip6_set_pref_test], [
1873                 #include <net/ipv6.h>
1874         ],[
1875                 ip6_sock_set_addr_preferences(NULL, 0);
1876         ],[-Werror])
1877 ])
1878 AC_DEFUN([LIBCFS_IP6_SET_PREF], [
1879         AC_MSG_CHECKING([if ip6_sock_set_addr_preferences() exists])
1880         LB2_LINUX_TEST_RESULT([ip6_set_pref_test], [
1881                 AC_DEFINE(HAVE_IP6_SET_PREF, 1,
1882                         [if ip6_sock_set_addr_preferences exists])
1883         ])
1884 ]) # LIBCFS_IP6_SET_PREF
1885
1886 #
1887 # LIBCFS_VMALLOC_2ARGS
1888 #
1889 # kernel v5.8-rc1~201^2~19
1890 # mm: remove the pgprot argument to __vmalloc
1891 AC_DEFUN([LIBCFS_SRC_VMALLOC_2ARGS], [
1892         LB2_LINUX_TEST_SRC([vmalloc_2args], [
1893                 #include <linux/vmalloc.h>
1894         ],[
1895                 __vmalloc(0, 0);
1896         ],[])
1897 ])
1898 AC_DEFUN([LIBCFS_VMALLOC_2ARGS], [
1899         AC_MSG_CHECKING([if __vmalloc has 2 args])
1900         LB2_LINUX_TEST_RESULT([vmalloc_2args], [
1901                 AC_DEFINE(HAVE_VMALLOC_2ARGS, 1,
1902                         [__vmalloc only takes 2 args.])
1903         ])
1904 ]) # LIBCFS_VMALLOC_2ARGS
1905
1906 #
1907 # LIBCFS_HAVE_NR_UNSTABLE_NFS
1908 #
1909 # kernel v5.8-rc1~201^2~75
1910 # mm/writeback: discard NR_UNSTABLE_NFS, use NR_WRITEBACK instead
1911 #
1912 AC_DEFUN([LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS], [
1913         LB2_LINUX_TEST_SRC([nr_unstable_nfs_exists], [
1914                 #include <linux/mm.h>
1915
1916                 int i;
1917         ],[
1918                 i = NR_UNSTABLE_NFS;
1919         ],[-Werror])
1920 ])
1921 AC_DEFUN([LIBCFS_HAVE_NR_UNSTABLE_NFS], [
1922         AC_MSG_CHECKING([if NR_UNSTABLE_NFS still in use])
1923         LB2_LINUX_TEST_RESULT([nr_unstable_nfs_exists], [
1924                 AC_DEFINE(HAVE_NR_UNSTABLE_NFS, 1,
1925                         [NR_UNSTABLE_NFS is still in use.])
1926         ])
1927 ]) # LIBCFS_HAVE_NR_UNSTABLE_NFS
1928
1929 #
1930 # LIBCFS_HAVE_MMAP_LOCK
1931 #
1932 # kernel v5.8-rc1~83^2~24
1933 # mmap locking API: rename mmap_sem to mmap_lock
1934 #
1935 AC_DEFUN([LIBCFS_SRC_HAVE_MMAP_LOCK], [
1936         LB2_LINUX_TEST_SRC([mmap_write_lock], [
1937                 #include <linux/mm.h>
1938         ],[
1939                 mmap_write_lock(NULL);
1940         ],[])
1941 ])
1942 AC_DEFUN([LIBCFS_HAVE_MMAP_LOCK], [
1943         AC_MSG_CHECKING([if mmap_lock API is available])
1944         LB2_LINUX_TEST_RESULT([mmap_write_lock], [
1945                 AC_DEFINE(HAVE_MMAP_LOCK, 1,
1946                         [mmap_lock API is available.])
1947         ])
1948 ]) # LIBCFS_HAVE_MMAP_LOCK
1949
1950 #
1951 # LIBCFS_KERNEL_SETSOCKOPT
1952 #
1953 # kernel v5.8-rc1~165^2~59^2
1954 # net: remove kernel_setsockopt
1955 AC_DEFUN([LIBCFS_SRC_KERNEL_SETSOCKOPT], [
1956         LB2_LINUX_TEST_SRC([kernel_setsockopt_exists], [
1957                 #include <linux/net.h>
1958         ],[
1959                 kernel_setsockopt(NULL, 0, 0, NULL, 0);
1960         ],[-Werror])
1961 ])
1962 AC_DEFUN([LIBCFS_KERNEL_SETSOCKOPT], [
1963         AC_MSG_CHECKING([if kernel_setsockopt still in use])
1964         LB2_LINUX_TEST_RESULT([kernel_setsockopt_exists], [
1965         AC_DEFINE(HAVE_KERNEL_SETSOCKOPT, 1,
1966                 [kernel_setsockopt still in use])
1967         ])
1968 ]) # LIBCFS_KERNEL_SETSOCKOPT
1969
1970 #
1971 # LIBCFS_SEC_RELEASE_SECCTX
1972 #
1973 # kernel linux-hwe-5.8 (5.8.0-22.23~20.04.1)
1974 # LSM: Use lsmcontext in security_release_secctx
1975 AC_DEFUN([LIBCFS_SRC_SEC_RELEASE_SECCTX], [
1976         LB2_LINUX_TEST_SRC([security_release_secctx_1arg], [
1977                 #include <linux/security.h>
1978         ],[
1979                 security_release_secctx(NULL);
1980         ],[])
1981 ])
1982 AC_DEFUN([LIBCFS_SEC_RELEASE_SECCTX], [
1983         AC_MSG_CHECKING([if security_release_secctx has 1 arg])
1984         LB2_LINUX_TEST_RESULT([security_release_secctx_1arg], [
1985                 AC_DEFINE(HAVE_SEC_RELEASE_SECCTX_1ARG, 1,
1986                         [security_release_secctx has 1 arg.])
1987         ])
1988 ]) # LIBCFS_SEC_RELEASE_SECCTX
1989
1990 #
1991 # LIBCFS_HAVE_KFREE_SENSITIVE
1992 #
1993 # kernel v5.10-rc1~3
1994 # mm: remove kzfree() compatibility definition
1995 #
1996 AC_DEFUN([LIBCFS_SRC_HAVE_KFREE_SENSITIVE], [
1997         LB2_LINUX_TEST_SRC([kfree_sensitive_exists], [
1998                 #include <linux/slab.h>
1999         ],[
2000                 kfree_sensitive(NULL);
2001         ], [-Werror])
2002 ])
2003 AC_DEFUN([LIBCFS_HAVE_KFREE_SENSITIVE], [
2004         AC_MSG_CHECKING([if kfree_sensitive() is available])
2005         LB2_LINUX_TEST_RESULT([kfree_sensitive_exists], [
2006                 AC_DEFINE(HAVE_KFREE_SENSITIVE, 1,
2007                         [kfree_sensitive() is available.])
2008         ])
2009 ]) # LIBCFS_HAVE_KFREE_SENSITIVE
2010
2011 #
2012 # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2013 #
2014 # Kernel v5.10-rc1-114-ga24d22b225ce
2015 # crypto: sha - split sha.h into sha1.h and sha2.h
2016 #
2017 AC_DEFUN([LIBCFS_HAVE_CRYPTO_SHA2_HEADER], [
2018 LB_CHECK_LINUX_HEADER([crypto/sha2.h], [
2019         AC_DEFINE(HAVE_CRYPTO_SHA2_HEADER, 1,
2020                 [crypto/sha2.h is present])])
2021 ]) # LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2022
2023 #
2024 # LIBCFS_HAVE_LIST_CMP_FUNC_T
2025 #
2026 # kernel 5.10.70 commit 4f0f586bf0c898233d8f316f471a21db2abd522d
2027 # treewide: Change list_sort to use const pointers
2028 AC_DEFUN([LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T], [
2029         LB2_LINUX_TEST_SRC([list_cmp_func_t_exists], [
2030                 #include <linux/list_sort.h>
2031         ],[
2032                 list_cmp_func_t cmp;
2033                 (void)cmp;
2034         ], [-Werror])
2035 ])
2036 AC_DEFUN([LIBCFS_HAVE_LIST_CMP_FUNC_T], [
2037         AC_MSG_CHECKING([if list_cmp_func_t type is defined])
2038         LB2_LINUX_TEST_RESULT([list_cmp_func_t_exists], [
2039                 AC_DEFINE(HAVE_LIST_CMP_FUNC_T, 1,
2040                         [list_cmp_func_t type is defined])
2041         ])
2042 ]) # LIBCFS_HAVE_LIST_CMP_FUNC_T
2043
2044 #
2045 # LIBCFS_NLA_STRLCPY
2046 #
2047 # Kernel version 5.10-rc3 commit 872f690341948b502c93318f806d821c56772c42
2048 # replaced nla_strlcpy() with nla_strscpy().
2049 #
2050 AC_DEFUN([LIBCFS_SRC_NLA_STRLCPY], [
2051         LB2_LINUX_TEST_SRC([nla_strlcpy], [
2052                 #include <net/netlink.h>
2053         ],[
2054                 if (nla_strlcpy(NULL, NULL, 0) == 0)
2055                         return -EINVAL;
2056         ])
2057 ])
2058 AC_DEFUN([LIBCFS_NLA_STRLCPY], [
2059         AC_MSG_CHECKING([if 'nla_strlcpy()' still exists])
2060         LB2_LINUX_TEST_RESULT([nla_strlcpy], [
2061                 AC_DEFINE(HAVE_NLA_STRLCPY, 1,
2062                         ['nla_strlcpy' is available])
2063         ])
2064 ]) # LIBCFS_NLA_STRLCPY
2065
2066 #
2067 # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2068 #
2069 # Linux v5.11-11104-ga28a6e860c6c
2070 #  string.h: move fortified functions definitions in a dedicated header.
2071 #
2072 AC_DEFUN([LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER],[
2073         LB2_LINUX_TEST_SRC([linux_fortify_string_header], [
2074                 #include <linux/fortify-string.h>
2075         ],[
2076         ],[])
2077 ])
2078 AC_DEFUN([LIBCFS_LINUX_FORTIFY_STRING_HEADER],[
2079         AC_MSG_CHECKING([Is linux/fortify-string.h header available])
2080         LB2_LINUX_TEST_RESULT([linux_fortify_string_header], [
2081                 AC_DEFINE(HAVE_LINUX_FORTIFY_STRING_HEADER, 1,
2082                         [linux/fortify-string.h header available])
2083         ])
2084 ]) # LIBCFS_LINUX_FORTIFY_STRING_HEADER
2085
2086 #
2087 # LIBCFS_HAVE_CIPHER_HEADER
2088 #
2089 # Kernel 5.12 commit 0eb76ba29d16df2951d37c54ca279c4e5630b071
2090 # crypto: remove cipher routines from public crypto API
2091 #
2092 AC_DEFUN([LIBCFS_HAVE_CIPHER_HEADER], [
2093 tmp_flags="$EXTRA_KCFLAGS"
2094 EXTRA_KCFLAGS="-Werror"
2095 LB_CHECK_LINUX_HEADER([crypto/internal/cipher.h], [
2096         AC_DEFINE(HAVE_CIPHER_H, 1,
2097                 [crypto/internal/cipher.h is present])
2098 ])
2099 EXTRA_KCFLAGS="$tmp_flags"
2100 ]) # LIBCFS_HAVE_CIPHER_HEADER
2101
2102 #
2103 # LIBCFS_HAVE_TASK_RUNNING
2104 #
2105 # Kernel 5.13-rc6 commit b03fbd4ff24c5f075e58eb19261d5f8b3e40d
2106 # introduced task_is_running() macro.
2107 #
2108 AC_DEFUN([LIBCFS_SRC_HAVE_TASK_IS_RUNNING], [
2109         LB2_LINUX_TEST_SRC([task_is_running], [
2110                 #include <linux/sched.h>
2111         ],[
2112                 if (task_is_running(current))
2113                         schedule();
2114         ], [-Werror])
2115 ])
2116 AC_DEFUN([LIBCFS_HAVE_TASK_IS_RUNNING], [
2117         AC_MSG_CHECKING([if task_is_running() is defined])
2118         LB2_LINUX_TEST_RESULT([task_is_running], [
2119                 AC_DEFINE(HAVE_TASK_IS_RUNNING, 1,
2120                         [task_is_running() is defined])
2121         ])
2122 ]) # LIBCFS_HAVE_TASK_IS_RUNNING
2123
2124 #
2125 # LIBCFS_IOV_ITER_HAS_ITER_TYPE
2126 #
2127 # kernel 5.13 commit 8cd54c1c848031a87820e58d772166ffdf8c08c0 change
2128 # ->type to ->iter_type
2129 #
2130 AC_DEFUN([LIBCFS_SRC_IOV_ITER_HAS_ITER_TYPE], [
2131         LB2_LINUX_TEST_SRC([iov_iter_has_iter_type_member], [
2132                 #include <linux/uio.h>
2133         ],[
2134                 struct iov_iter iter = { .iter_type = ITER_KVEC };
2135                 (void)iter;
2136         ],
2137         [-Werror])
2138 ])
2139 AC_DEFUN([LIBCFS_IOV_ITER_HAS_ITER_TYPE], [
2140         AC_MSG_CHECKING([if iov_iter has member type])
2141         LB2_LINUX_TEST_RESULT([iov_iter_has_iter_type_member], [
2142                 AC_DEFINE(HAVE_IOV_ITER_HAS_ITER_TYPE_MEMBER, 1,
2143                         [if iov_iter has member iter_type])
2144         ])
2145 ]) # LIBCFS_IOV_ITER_HAS_ITER_TYPE
2146
2147 #
2148 # LIBCFS_LINUX_STDARG_HEADER
2149 #
2150 # Kernel 5.14-rc5 commit c0891ac15f0428ffa81b2e818d416bdf3cb74ab6
2151 # isystem: ship and use stdarg.h
2152 #
2153 AC_DEFUN([LIBCFS_LINUX_STDARG_HEADER], [
2154 tmp_flags="$EXTRA_KCFLAGS"
2155 EXTRA_KCFLAGS="-Werror"
2156 LB_CHECK_LINUX_HEADER([linux/stdarg.h], [
2157         AC_DEFINE(HAVE_LINUX_STDARG_HEADER, 1, [linux/stdarg.h is present])
2158 ])
2159 EXTRA_KCFLAGS="$tmp_flags"
2160 ]) # LIBCFS_LINUX_STDARG_HEADER
2161
2162 #
2163 # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2164 #
2165 # Kernel 5.14 commit f39650de687e35766572ac89dbcd16a5911e2f0a
2166 # kernel.h: split out panic and oops helpers
2167 #
2168 AC_DEFUN([LIBCFS_HAVE_PANIC_NOTIFIER_HEADER], [
2169 tmp_flags="$EXTRA_KCFLAGS"
2170 EXTRA_KCFLAGS="-Werror"
2171 LB_CHECK_LINUX_HEADER([linux/panic_notifier.h], [
2172         AC_DEFINE(HAVE_PANIC_NOTIFIER_H, 1,
2173                 [linux/panic_notifier.h is present])
2174 ])
2175 EXTRA_KCFLAGS="$tmp_flags"
2176 ]) # LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2177
2178 #
2179 # LIBCFS_PARAM_SET_UINT_MINMAX
2180 #
2181 # Kernel 5.15-rc1 commit 2a14c9ae15a38148484a128b84bff7e9ffd90d68
2182 # moved param_set_uint_minmax to common code
2183 #
2184 AC_DEFUN([LIBCFS_SRC_PARAM_SET_UINT_MINMAX],[
2185         LB2_LINUX_TEST_SRC([param_set_uint_minmax], [
2186                 #include <linux/moduleparam.h>
2187         ],[
2188                 param_set_uint_minmax(NULL, NULL, 0, 0);
2189         ], [])
2190 ])
2191 AC_DEFUN([LIBCFS_PARAM_SET_UINT_MINMAX],[
2192         AC_MSG_CHECKING([does function 'param_set_uint_minmax' exist])
2193         LB2_LINUX_TEST_RESULT([param_set_uint_minmax], [
2194                 AC_DEFINE(HAVE_PARAM_SET_UINT_MINMAX, 1,
2195                         ['param_set_uint_minmax' is available])
2196         ])
2197 ]) # LIBCFS_PARAM_SET_UINT_MINMAX
2198
2199 #
2200 # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2201 #
2202 # Kernel 5.15-rc6 commit fe45e630a1035aea94c29016f2598bbde149bbe3
2203 # block: move integrity handling out of <linux/blkdev.h>
2204 #
2205 AC_DEFUN([LIBCFS_LINUX_BLK_INTEGRITY_HEADER], [
2206 tmp_flags="$EXTRA_KCFLAGS"
2207 EXTRA_KCFLAGS="-Werror"
2208 LB_CHECK_LINUX_HEADER([linux/blk-integrity.h], [
2209         AC_DEFINE(HAVE_LINUX_BLK_INTEGRITY_HEADER, 1,
2210                 [linux/blk-integrity.h is present])
2211 ])
2212 EXTRA_KCFLAGS="$tmp_flags"
2213 ]) # LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2214
2215 #
2216 # LIBCFS_PDE_DATA_EXISTS
2217 #
2218 # Linux commit v5.16-11573-g6dfbbae14a7b
2219 #    introduce pde_data()
2220 # Linux commit v5.16-11574-g359745d78351
2221 #    remove PDE_DATA()
2222 #
2223 AC_DEFUN([LIBCFS_SRC_PDE_DATA_EXISTS],[
2224         LB2_LINUX_TEST_SRC([pde_data], [
2225                 #include <linux/proc_fs.h>
2226         ],[
2227                 struct inode *inode = NULL;
2228                 void *data =pde_data(inode);
2229                 (void)data;
2230         ],[])
2231 ])
2232 AC_DEFUN([LIBCFS_PDE_DATA_EXISTS],[
2233         AC_MSG_CHECKING([does function 'pde_data' exist])
2234         LB2_LINUX_TEST_RESULT([pde_data], [
2235                 AC_DEFINE(HAVE_pde_data, 1, [function pde_data() available])
2236         ],[
2237                 AC_DEFINE(pde_data(inode), PDE_DATA(inode),
2238                           [function pde_data() unavailable])
2239         ])
2240 ]) # LIBCFS_PDE_DATA_EXISTS
2241
2242 #
2243 # LIBCFS_BIO_ALLOC_WITH_BDEV
2244 #
2245 # Linux commit v5.17-rc2-21-g07888c665b40
2246 #   block: pass a block_device and opf to bio_alloc
2247 #
2248 AC_DEFUN([LIBCFS_SRC_BIO_ALLOC_WITH_BDEV],[
2249         LB2_LINUX_TEST_SRC([bio_alloc_with_bdev], [
2250                 #include <linux/bio.h>
2251         ],[
2252                 struct block_device *bdev = NULL;
2253                 unsigned short nr_vecs = 1;
2254                 gfp_t gfp = GFP_KERNEL;
2255                 struct bio *bio = bio_alloc(bdev, nr_vecs, REQ_OP_WRITE, gfp);
2256                 (void) bio;
2257         ],[])
2258 ])
2259 AC_DEFUN([LIBCFS_BIO_ALLOC_WITH_BDEV],[
2260         AC_MSG_CHECKING([does bio_alloc() takes a struct block_device])
2261         LB2_LINUX_TEST_RESULT([bio_alloc_with_bdev], [
2262                 AC_DEFINE(HAVE_BIO_ALLOC_WITH_BDEV, 1,
2263                         [bio_alloc() takes a struct block_device])
2264         ])
2265 ]) # LIBCFS_BIO_ALLOC_WITH_BDEV
2266
2267 dnl #
2268 dnl # Generate and compile all of the kernel API test cases to determine
2269 dnl # which interfaces are available.  By invoking the kernel build system
2270 dnl # only once the compilation can be done in parallel significantly
2271 dnl # speeding up the process.
2272 dnl #
2273 AC_DEFUN([LIBCFS_PROG_LINUX_SRC], [
2274         # 3.11
2275         LIBCFS_SRC_KTIME_GET_TS64
2276         # 3.12
2277         LIBCFS_SRC_PREPARE_TO_WAIT_EVENT
2278         LIBCFS_SRC_KERNEL_PARAM_OPS
2279         LIBCFS_SRC_KTIME_ADD
2280         LIBCFS_SRC_KTIME_AFTER
2281         LIBCFS_SRC_KTIME_BEFORE
2282         LIBCFS_SRC_KTIME_COMPARE
2283         LIBCFS_SRC_SHRINKER_COUNT
2284         # 3.13
2285         LIBCFS_SRC_MATCH_WILDCARD
2286         # 3.14
2287         LIBCFS_SRC_HAVE_MAPPING_AS_EXITING_FLAG
2288         # 3.15
2289         LIBCFS_SRC_IOV_ITER_HAS_TYPE
2290         # 3.16
2291         LIBCFS_SRC_HAVE_GLOB
2292         # 3.17
2293         LIBCFS_SRC_HLIST_ADD_AFTER
2294         LIBCFS_SRC_TIMESPEC64
2295         LIBCFS_SRC_KTIME_GET_NS
2296         LIBCFS_SRC_KTIME_GET_REAL_TS64
2297         LIBCFS_SRC_KTIME_GET_REAL_SECONDS
2298         LIBCFS_SRC_KTIME_GET_REAL_NS
2299         LIBCFS_SRC_KTIME_TO_TIMESPEC64
2300         LIBCFS_SRC_TIMESPEC64_SUB
2301         LIBCFS_SRC_TIMESPEC64_TO_KTIME
2302         # 3.19
2303         LIBCFS_SRC_KTIME_GET_SECONDS
2304         LIBCFS_SRC_WAIT_WOKEN
2305         # 4.0
2306         LIBCFS_SRC_KTIME_MS_DELTA
2307         # 4.1
2308         LIBCFS_SRC_KERNEL_PARAM_LOCK
2309         # 4.2
2310         LIBCFS_SRC_STRSCPY_EXISTS
2311         LIBCFS_SRC_HAVE_TOPOLOGY_SIBLING_CPUMASK
2312         # 4.4
2313         LIBCFS_SRC_KSTRTOBOOL_FROM_USER
2314         LIBCFS_SRC_NETLINK_CALLBACK_START
2315         # 4.5
2316         LIBCFS_SRC_CRYPTO_HASH_HELPERS
2317         LIBCFS_SRC_RHASHTABLE_REPLACE
2318         # 4.6
2319         LIBCFS_SRC_BROKEN_HASH_64
2320         LIBCFS_SRC_STACKTRACE_OPS_ADDRESS_RETURN_INT
2321         LIBCFS_SRC_GET_USER_PAGES_6ARG
2322         # 4.7
2323         LIBCFS_SRC_RHASHTABLE_INSERT_FAST
2324         LIBCFS_SRC_RHASHTABLE_WALK_INIT_3ARG
2325         # 4.8
2326         LIBCFS_SRC_RHASHTABLE_LOOKUP
2327         LIBCFS_SRC_RHLTABLE
2328         LIBCFS_SRC_STACKTRACE_OPS
2329         # 4.9
2330         LIBCFS_SRC_GET_USER_PAGES_GUP_FLAGS
2331         LIBCFS_SRC_RHASHTABLE_WALK_ENTER
2332         # 4.10
2333         LIBCFS_SRC_HOTPLUG_STATE_MACHINE
2334         # 4.11
2335         LIBCFS_SRC_NL_EXT_ACK
2336         LIBCFS_SRC_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2337         LIBCFS_SRC_KREF_READ
2338         LIBCFS_SRC_RHT_BUCKET_VAR
2339         # 4.12
2340         LIBCFS_SRC_CPUS_READ_LOCK
2341         LIBCFS_SRC_UUID_T
2342         LIBCFS_SRC_WAIT_QUEUE_TASK_LIST_RENAME
2343         LIBCFS_SRC_WAIT_BIT_QUEUE_ENTRY_EXISTS
2344         LIBCFS_SRC_MEMALLOC_NORECLAIM
2345         # 4.13
2346         LIBCFS_SRC_NLA_STRDUP
2347         LIBCFS_SRC_WAIT_QUEUE_ENTRY
2348         # 4.14
2349         LIBCFS_SRC_DEFINE_TIMER
2350         LIBCFS_SRC_NEW_KERNEL_WRITE
2351         LIBCFS_SRC_NEW_KERNEL_READ
2352         # 4.15
2353         LIBCFS_SRC_LOCKDEP_IS_HELD
2354         LIBCFS_SRC_TIMER_SETUP
2355         # 4.16
2356         LIBCFS_SRC_HAVE_NS_TO_TIMESPEC64
2357         LIBCFS_SRC_WAIT_VAR_EVENT
2358         # 4.17
2359         LIBCFS_SRC_BITMAP_ALLOC
2360         LIBCFS_SRC_CLEAR_AND_WAKE_UP_BIT
2361         # 4.18
2362         LIBCFS_SRC_TCP_SOCK_SET_NODELAY
2363         LIBCFS_SRC_TCP_SOCK_SET_KEEPIDLE
2364         # 4.19
2365         LIBCFS_SRC_XARRAY_SUPPORT
2366         LIBCFS_SRC_NL_DUMP_EXT_ACK
2367         # 4.20
2368         LIBCFS_SRC_HAVE_IOV_ITER_TYPE
2369         # 5.0
2370         LIBCFS_SRC_MM_TOTALRAM_PAGES_FUNC
2371         LIBCFS_SRC_GET_REQUEST_KEY_AUTH
2372         # 5.2
2373         LIBCFS_SRC_KOBJ_TYPE_DEFAULT_GROUPS
2374         # 5.3
2375         LIBCFS_SRC_LOOKUP_USER_KEY
2376         LIBCFS_SRC_FORCE_SIG_WITH_TASK
2377         LIBCFS_SRC_CACHE_DETAIL_WRITERS
2378         # 5.4
2379         LIBCFS_SRC_GENL_DUMPIT_INFO
2380         # 5.6
2381         LIBCFS_SRC_HAVE_PROC_OPS
2382         # 5.7
2383         LIBCFS_SRC_TCP_SOCK_SET_QUICKACK
2384         LIBCFS_SRC_TCP_SOCK_SET_KEEPINTVL
2385         LIBCFS_SRC_TCP_SOCK_SET_KEEPCNT
2386         # 5.8
2387         LIBCFS_SRC_HAVE_NR_UNSTABLE_NFS
2388         LIBCFS_SRC_HAVE_MMAP_LOCK
2389         LIBCFS_SRC_KERNEL_SETSOCKOPT
2390         LIBCFS_SRC_IP6_SET_PREF
2391         LIBCFS_SRC_VMALLOC_2ARGS
2392         # 5.10
2393         LIBCFS_SRC_SEC_RELEASE_SECCTX
2394         LIBCFS_SRC_HAVE_KFREE_SENSITIVE
2395         LIBCFS_SRC_HAVE_LIST_CMP_FUNC_T
2396         LIBCFS_SRC_NLA_STRLCPY
2397         # 5.12
2398         LIBCFS_SRC_LINUX_FORTIFY_STRING_HEADER
2399         # 5.13
2400         LIBCFS_SRC_HAVE_TASK_IS_RUNNING
2401         LIBCFS_SRC_IOV_ITER_HAS_ITER_TYPE
2402         # 5.15
2403         LIBCFS_SRC_PARAM_SET_UINT_MINMAX
2404         # 5.17
2405         LIBCFS_SRC_PDE_DATA_EXISTS
2406         LIBCFS_SRC_BIO_ALLOC_WITH_BDEV
2407
2408         LB2_LINUX_TEST_COMPILE_ALL([libcfs],
2409                 [for available kernel interfaces to libcfs])
2410 ])
2411
2412 dnl #
2413 dnl # Check results of kernel interface tests.
2414 dnl #
2415 AC_DEFUN([LIBCFS_PROG_LINUX_RESULTS], [
2416         # 3.11
2417         LIBCFS_KTIME_GET_TS64
2418         # 3.12
2419         LIBCFS_PREPARE_TO_WAIT_EVENT
2420         LIBCFS_KERNEL_PARAM_OPS
2421         LIBCFS_KTIME_ADD
2422         LIBCFS_KTIME_AFTER
2423         LIBCFS_KTIME_BEFORE
2424         LIBCFS_KTIME_COMPARE
2425         LIBCFS_SHRINKER_COUNT
2426         # 3.13
2427         LIBCFS_MATCH_WILDCARD
2428         # 3.14
2429         LIBCFS_HAVE_MAPPING_AS_EXITING_FLAG
2430         # 3.15
2431         LIBCFS_IOV_ITER_HAS_TYPE
2432         # 3.16
2433         LIBCFS_HAVE_GLOB
2434         # 3.17
2435         LIBCFS_HLIST_ADD_AFTER
2436         LIBCFS_TIMESPEC64
2437         LIBCFS_KTIME_GET_NS
2438         LIBCFS_KTIME_GET_REAL_TS64
2439         LIBCFS_KTIME_GET_REAL_SECONDS
2440         LIBCFS_KTIME_GET_REAL_NS
2441         LIBCFS_KTIME_TO_TIMESPEC64
2442         LIBCFS_TIMESPEC64_SUB
2443         LIBCFS_TIMESPEC64_TO_KTIME
2444         # 3.19
2445         LIBCFS_KTIME_GET_SECONDS
2446         LIBCFS_WAIT_WOKEN
2447         # 4.0
2448         LIBCFS_KTIME_MS_DELTA
2449         # 4.1
2450         LIBCFS_KERNEL_PARAM_LOCK
2451         # 4.2
2452         LIBCFS_STRSCPY_EXISTS
2453         LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
2454         # 4.4
2455         LIBCFS_KSTRTOBOOL_FROM_USER
2456         LIBCFS_NETLINK_CALLBACK_START
2457         # 4.5
2458         LIBCFS_CRYPTO_HASH_HELPERS
2459         LIBCFS_RHASHTABLE_REPLACE
2460         # 4.6
2461         LIBCFS_BROKEN_HASH_64
2462         LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
2463         LIBCFS_GET_USER_PAGES_6ARG
2464         # 4.7
2465         LIBCFS_RHASHTABLE_INSERT_FAST
2466         LIBCFS_RHASHTABLE_WALK_INIT_3ARG
2467         # 4.8
2468         LIBCFS_RHASHTABLE_LOOKUP
2469         LIBCFS_RHLTABLE
2470         LIBCFS_STACKTRACE_OPS
2471         # 4.9
2472         LIBCFS_GET_USER_PAGES_GUP_FLAGS
2473         LIBCFS_RHASHTABLE_WALK_ENTER
2474         # 4.10
2475         LIBCFS_HOTPLUG_STATE_MACHINE
2476         # 4.11
2477         LIBCFS_NL_EXT_ACK
2478         LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
2479         LIBCFS_KREF_READ
2480         LIBCFS_RHT_BUCKET_VAR
2481         # 4.12
2482         LIBCFS_CPUS_READ_LOCK
2483         LIBCFS_UUID_T
2484         LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
2485         LIBCFS_WAIT_BIT_QUEUE_ENTRY_EXISTS
2486         LIBCFS_MEMALLOC_NORECLAIM
2487         # 4.13
2488         LIBCFS_NLA_STRDUP
2489         LIBCFS_WAIT_QUEUE_ENTRY
2490         # 4.14
2491         LIBCFS_DEFINE_TIMER
2492         LIBCFS_NEW_KERNEL_WRITE
2493         LIBCFS_NEW_KERNEL_READ
2494         # 4.15
2495         LIBCFS_LOCKDEP_IS_HELD
2496         LIBCFS_TIMER_SETUP
2497         # 4.16
2498         LIBCFS_HAVE_NS_TO_TIMESPEC64
2499         LIBCFS_WAIT_VAR_EVENT
2500         # 4.17
2501         LIBCFS_BITMAP_ALLOC
2502         LIBCFS_CLEAR_AND_WAKE_UP_BIT
2503         # 4.18
2504         LIBCFS_TCP_SOCK_SET_NODELAY
2505         LIBCFS_TCP_SOCK_SET_KEEPIDLE
2506         # 4.19
2507         LIBCFS_XARRAY_SUPPORT
2508         LIBCFS_NL_DUMP_EXT_ACK
2509         # 4.20
2510         LIBCFS_HAVE_IOV_ITER_TYPE
2511         # 5.0
2512         LIBCFS_MM_TOTALRAM_PAGES_FUNC
2513         LIBCFS_GET_REQUEST_KEY_AUTH
2514         # 5.2
2515         LIBCFS_KOBJ_TYPE_DEFAULT_GROUPS
2516         # 5.3
2517         LIBCFS_LOOKUP_USER_KEY
2518         LIBCFS_FORCE_SIG_WITH_TASK
2519         LIBCFS_CACHE_DETAIL_WRITERS
2520         # 5.4
2521         LIBCFS_GENL_DUMPIT_INFO
2522         # 5.6
2523         LIBCFS_HAVE_PROC_OPS
2524         # 5.7
2525         LIBCFS_TCP_SOCK_SET_QUICKACK
2526         LIBCFS_TCP_SOCK_SET_KEEPINTVL
2527         LIBCFS_TCP_SOCK_SET_KEEPCNT
2528         # 5.8
2529         LIBCFS_HAVE_NR_UNSTABLE_NFS
2530         LIBCFS_HAVE_MMAP_LOCK
2531         LIBCFS_KERNEL_SETSOCKOPT
2532         LIBCFS_IP6_SET_PREF
2533         LIBCFS_VMALLOC_2ARGS
2534         # 5.10
2535         LIBCFS_SEC_RELEASE_SECCTX
2536         LIBCFS_HAVE_KFREE_SENSITIVE
2537         LIBCFS_HAVE_LIST_CMP_FUNC_T
2538         LIBCFS_NLA_STRLCPY
2539         # 5.12
2540         LIBCFS_LINUX_FORTIFY_STRING_HEADER
2541         # 5.13
2542         LIBCFS_HAVE_TASK_IS_RUNNING
2543         LIBCFS_IOV_ITER_HAS_ITER_TYPE
2544         # 5.15
2545         LIBCFS_PARAM_SET_UINT_MINMAX
2546         # 5.17
2547         LIBCFS_PDE_DATA_EXISTS
2548         LIBCFS_BIO_ALLOC_WITH_BDEV
2549 ])
2550
2551 #
2552 # LIBCFS_PROG_LINUX
2553 #
2554 # LibCFS linux kernel checks
2555 #
2556 AC_DEFUN([LIBCFS_PROG_LINUX], [
2557 AC_MSG_NOTICE([LibCFS kernel checks
2558 ==============================================================================])
2559 LIBCFS_CONFIG_PANIC_DUMPLOG
2560
2561 # 4.6 - Header Check
2562 LIBCFS_STRINGHASH
2563 # 4.6 - Export Check
2564 LIBCFS_EXPORT_KSET_FIND_OBJ
2565 # 4.10 - Header Check
2566 LIBCFS_REFCOUNT_T
2567 # 4.11 - Header Check
2568 LIBCFS_SCHED_HEADERS
2569 # 4.13 - Header Checks
2570 LIBCFS_HAVE_PROCESSOR_HEADER
2571 LIBCFS_HAVE_WAIT_BIT_HEADER
2572 # 4.13 - Export Check
2573 LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
2574 # 5.0 - Header Check
2575 LIBCFS_GENRADIX
2576 # 5.7 - Export Check and Header Check
2577 LIBCFS_KALLSYMS_LOOKUP
2578 LIBCFS_HAVE_CRYPTO_SHA2_HEADER
2579 # 5.12 - Header Check
2580 LIBCFS_HAVE_CIPHER_HEADER
2581 # 5.14 - Header Checks
2582 LIBCFS_LINUX_STDARG_HEADER
2583 LIBCFS_HAVE_PANIC_NOTIFIER_HEADER
2584 # 5.15 - Header Check
2585 LIBCFS_LINUX_BLK_INTEGRITY_HEADER
2586 ]) # LIBCFS_PROG_LINUX
2587
2588 #
2589 # LIBCFS_PATH_DEFAULTS
2590 #
2591 # default paths for installed files
2592 #
2593 AC_DEFUN([LIBCFS_PATH_DEFAULTS], [
2594 ]) # LIBCFS_PATH_DEFAULTS
2595
2596 #
2597 # LIBCFS_CONFIGURE
2598 #
2599 # other configure checks
2600 #
2601 AC_DEFUN([LIBCFS_CONFIGURE], [
2602 AC_MSG_NOTICE([LibCFS core checks
2603 ==============================================================================])
2604
2605 # libcfs/libcfs/util/nidstrings.c
2606 AC_CHECK_HEADERS([netdb.h asm/types.h endian.h])
2607 AC_CHECK_FUNCS([gethostbyname])
2608
2609 # --------  Check for required packages  --------------
2610
2611 AC_MSG_NOTICE([LibCFS required packages checks
2612 ==============================================================================])
2613
2614 AC_MSG_CHECKING([whether to enable readline support])
2615 AC_ARG_ENABLE(readline,
2616         AS_HELP_STRING([--disable-readline],
2617                 [disable readline support]),
2618         [], [enable_readline="yes"])
2619 AC_MSG_RESULT([$enable_readline])
2620
2621 LIBREADLINE=""
2622 AS_IF([test "x$enable_readline" = xyes], [
2623         AC_CHECK_LIB([readline], [readline], [
2624                 LIBREADLINE="-lreadline"
2625                 AC_DEFINE(HAVE_LIBREADLINE, 1,
2626                         [readline library is available])
2627         ])
2628 ])
2629 AC_SUBST(LIBREADLINE)
2630
2631 AC_MSG_CHECKING([whether to use libpthread for libcfs library])
2632 AC_ARG_ENABLE([libpthread],
2633         AS_HELP_STRING([--disable-libpthread],
2634                 [disable libpthread]),
2635         [], [enable_libpthread="yes"])
2636 AC_MSG_RESULT([$enable_libpthread])
2637
2638 PTHREAD_LIBS=""
2639 AS_IF([test "x$enable_libpthread" = xyes], [
2640         AC_CHECK_LIB([pthread], [pthread_create], [
2641                 PTHREAD_LIBS="-lpthread"
2642                 AC_DEFINE([HAVE_LIBPTHREAD], 1,
2643                         [use libpthread for libcfs library])
2644         ])
2645 ], [
2646         AC_MSG_WARN([Using libpthread for libcfs library is disabled explicitly])
2647 ])
2648 AC_SUBST(PTHREAD_LIBS)
2649 ]) # LIBCFS_CONFIGURE
2650
2651 #
2652 # LIBCFS_CONFIG_FILES
2653 #
2654 # files that should be generated with AC_OUTPUT
2655 #
2656 AC_DEFUN([LIBCFS_CONFIG_FILES], [
2657 AC_CONFIG_FILES([
2658 libcfs/Makefile
2659 libcfs/autoMakefile
2660 libcfs/autoconf/Makefile
2661 libcfs/include/Makefile
2662 libcfs/include/libcfs/Makefile
2663 libcfs/include/uapi/Makefile
2664 libcfs/include/libcfs/linux/Makefile
2665 libcfs/include/libcfs/util/Makefile
2666 libcfs/include/libcfs/crypto/Makefile
2667 libcfs/include/uapi/linux/Makefile
2668 libcfs/libcfs/Makefile
2669 libcfs/libcfs/autoMakefile
2670 libcfs/libcfs/linux/Makefile
2671 libcfs/libcfs/util/Makefile
2672 libcfs/libcfs/crypto/Makefile
2673 ])
2674 ]) # LIBCFS_CONFIG_FILES