4 # whether to enable various libcfs debugs (CDEBUG, ENTRY/EXIT, LASSERT, etc.)
6 AC_DEFUN([LIBCFS_CONFIG_CDEBUG], [
7 AC_MSG_CHECKING([whether to enable CDEBUG, CWARN])
8 AC_ARG_ENABLE([libcfs_cdebug],
9 AC_HELP_STRING([--disable-libcfs-cdebug],
10 [disable libcfs CDEBUG, CWARN]),
11 [], [enable_libcfs_cdebug="yes"])
12 AC_MSG_RESULT([$enable_libcfs_cdebug])
13 AS_IF([test "x$enable_libcfs_cdebug" = xyes],
14 [AC_DEFINE(CDEBUG_ENABLED, 1, [enable libcfs CDEBUG, CWARN])])
16 AC_MSG_CHECKING([whether to enable ENTRY/EXIT])
17 AC_ARG_ENABLE([libcfs_trace],
18 AC_HELP_STRING([--disable-libcfs-trace],
19 [disable libcfs ENTRY/EXIT]),
20 [], [enable_libcfs_trace="yes"])
21 AC_MSG_RESULT([$enable_libcfs_trace])
22 AS_IF([test "x$enable_libcfs_trace" = xyes],
23 [AC_DEFINE(CDEBUG_ENTRY_EXIT, 1, [enable libcfs ENTRY/EXIT])])
25 AC_MSG_CHECKING([whether to enable LASSERT, LASSERTF])
26 AC_ARG_ENABLE([libcfs_assert],
27 AC_HELP_STRING([--disable-libcfs-assert],
28 [disable libcfs LASSERT, LASSERTF]),
29 [], [enable_libcfs_assert="yes"])
30 AC_MSG_RESULT([$enable_libcfs_assert])
31 AS_IF([test x$enable_libcfs_assert = xyes],
32 [AC_DEFINE(LIBCFS_DEBUG, 1, [enable libcfs LASSERT, LASSERTF])])
33 ]) # LIBCFS_CONFIG_CDEBUG
36 # LIBCFS_CONFIG_PANIC_DUMPLOG
38 # check if tunable panic_dumplog is wanted
40 AC_DEFUN([LIBCFS_CONFIG_PANIC_DUMPLOG], [
41 AC_MSG_CHECKING([whether to use tunable 'panic_dumplog' support])
42 AC_ARG_ENABLE([panic_dumplog],
43 AC_HELP_STRING([--enable-panic_dumplog],
44 [enable panic_dumplog]),
45 [], [enable_panic_dumplog="no"])
46 AC_MSG_RESULT([$enable_panic_dumplog])
47 AS_IF([test "x$enable_panic_dumplog" = xyes],
48 [AC_DEFINE(LNET_DUMP_ON_PANIC, 1, [use dumplog on panic])])
49 ]) # LIBCFS_CONFIG_PANIC_DUMPLOG
52 # LIBCFS_STACKTRACE_OPS_HAVE_WALK_STACK
54 # 2.6.32-30.el6 adds a new 'walk_stack' field in 'struct stacktrace_ops'
56 AC_DEFUN([LIBCFS_STACKTRACE_OPS_HAVE_WALK_STACK], [
57 LB_CHECK_COMPILE([if 'struct stacktrace_ops' has 'walk_stack' field],
58 stacktrace_ops_walk_stack, [
59 #include <asm/stacktrace.h>
61 ((struct stacktrace_ops *)0)->walk_stack(NULL, NULL, 0, NULL, NULL, NULL, NULL);
63 AC_DEFINE(STACKTRACE_OPS_HAVE_WALK_STACK, 1,
64 ['struct stacktrace_ops' has 'walk_stack' field])
66 ]) # LIBCFS_STACKTRACE_OPS_HAVE_WALK_STACK
69 # LIBCFS_STACKTRACE_WARNING
71 # 3.0 removes stacktrace_ops warning* functions
73 AC_DEFUN([LIBCFS_STACKTRACE_WARNING], [
74 LB_CHECK_COMPILE([if 'stacktrace_ops.warning' is exist],
75 stacktrace_ops_warning, [
78 #include <asm/stacktrace.h>
80 ((struct stacktrace_ops *)0)->warning(NULL, NULL);
82 AC_DEFINE(HAVE_STACKTRACE_WARNING, 1,
83 [stacktrace_ops.warning is exist])
85 ]) # LIBCFS_STACKTRACE_WARNING
88 # LC_SHRINKER_WANT_SHRINK_PTR
90 # RHEL6/2.6.32 want to have pointer to shrinker self pointer in handler function
92 AC_DEFUN([LC_SHRINKER_WANT_SHRINK_PTR], [
93 LB_CHECK_COMPILE([if 'shrinker' want self pointer in handler],
94 shrink_self_pointer, [
97 struct shrinker *tmp = NULL;
98 tmp->shrink(tmp, 0, 0);
100 AC_DEFINE(HAVE_SHRINKER_WANT_SHRINK_PTR, 1,
101 [shrinker want self pointer in handler])
103 ]) # LC_SHRINKER_WANT_SHRINK_PTR
106 # LIBCFS_SYSCTL_CTLNAME
108 # 2.6.33 no longer has ctl_name & strategy field in struct ctl_table.
110 AC_DEFUN([LIBCFS_SYSCTL_CTLNAME], [
111 LB_CHECK_COMPILE([if 'ctl_table' has a 'ctl_name' field],
112 ctl_table_ctl_name, [
113 #include <linux/sysctl.h>
116 ct.ctl_name = sizeof(ct);
118 AC_DEFINE(HAVE_SYSCTL_CTLNAME, 1,
119 [ctl_table has ctl_name field])
121 ]) # LIBCFS_SYSCTL_CTLNAME
124 # LIBCFS_MODULE_LOCKING
126 # 2.6.36 introduced locking to module params. RHEL6 lacks this support
128 AC_DEFUN([LIBCFS_MODULE_LOCKING],[
129 LB_CHECK_COMPILE([does the kernel support module param locking],
130 module_param_locking, [
131 #include <linux/moduleparam.h>
133 __kernel_param_lock(NULL);
134 __kernel_param_unlock(NULL);
136 AC_DEFINE(HAVE_MODULE_PARAM_LOCKING, 1,
137 [locking module param is supported])
139 ]) # LIBCFS_MODULE_LOCKING
144 # 2.6.38 kstrtoul is added
146 AC_DEFUN([LIBCFS_KSTRTOUL], [
147 LB_CHECK_COMPILE([if Linux kernel has 'kstrtoul'],
149 #include <linux/kernel.h>
151 unsigned long result;
152 return kstrtoul("12345", 0, &result);
154 AC_DEFINE(HAVE_KSTRTOUL, 1,
155 [kernel has kstrtoul])
160 # LIBCFS_DUMP_TRACE_ADDRESS
162 # 2.6.39 adds a base pointer address argument to dump_trace
164 AC_DEFUN([LIBCFS_DUMP_TRACE_ADDRESS], [
165 LB_CHECK_COMPILE([if 'dump_trace' want address],
166 dump_trace_address, [
169 #include <asm/stacktrace.h>
171 dump_trace(NULL, NULL, NULL, 0, NULL, NULL);
173 AC_DEFINE(HAVE_DUMP_TRACE_ADDRESS, 1,
174 [dump_trace want address argument])
176 ]) # LIBCFS_DUMP_TRACE_ADDRESS
181 # FC15 2.6.40-5 backported the "shrink_control" parameter to the memory
182 # pressure shrinker from Linux 3.0
184 AC_DEFUN([LC_SHRINK_CONTROL], [
185 LB_CHECK_COMPILE([if 'shrink_control' is present],
187 #include <linux/atomic.h>
188 #include <linux/mm.h>
190 struct shrink_control tmp = {0};
191 tmp.nr_to_scan = sizeof(tmp);
193 AC_DEFINE(HAVE_SHRINK_CONTROL, 1,
194 [shrink_control is present])
196 ]) # LC_SHRINK_CONTROL
199 # LIBCFS_PROCESS_NAMESPACE
201 # 3.5 introduced process namespace
202 AC_DEFUN([LIBCFS_PROCESS_NAMESPACE], [
203 LB_CHECK_LINUX_HEADER([linux/uidgid.h], [
204 AC_DEFINE(HAVE_UIDGID_HEADER, 1,
205 [uidgid.h is present])])
206 ]) # LIBCFS_PROCESS_NAMESPACE
211 # 3.5 added helpers to read the new uid/gid types from VFS structures
212 # SLE11 SP3 has uidgid.h but not the helpers
214 AC_DEFUN([LIBCFS_I_UID_READ], [
215 LB_CHECK_COMPILE([if 'i_uid_read' is present],
217 #include <linux/fs.h>
221 AC_DEFINE(HAVE_I_UID_READ, 1, [i_uid_read is present])
223 ]) # LIBCFS_I_UID_READ
228 AC_DEFUN([LIBCFS_HAVE_CRC32], [
229 LB_CHECK_CONFIG_IM([CRC32],
230 [have_crc32="yes"], [have_crc32="no"])
231 AS_IF([test "x$have_crc32" = xyes],
232 [AC_DEFINE(HAVE_CRC32, 1,
233 [kernel compiled with CRC32 functions])])
234 ]) # LIBCFS_HAVE_CRC32
237 # LIBCFS_ENABLE_CRC32_ACCEL
239 AC_DEFUN([LIBCFS_ENABLE_CRC32_ACCEL], [
240 LB_CHECK_CONFIG_IM([CRYPTO_CRC32_PCLMUL],
241 [enable_crc32_crypto="no"], [enable_crc32_crypto="yes"])
242 AS_IF([test "x$have_crc32" = xyes -a "x$enable_crc32_crypto" = xyes], [
243 AC_DEFINE(NEED_CRC32_ACCEL, 1, [need pclmulqdq based crc32])
244 AC_MSG_WARN([No crc32 pclmulqdq crypto api found, enable internal pclmulqdq based crc32])])
245 ]) # LIBCFS_ENABLE_CRC32_ACCEL
248 # LIBCFS_ENABLE_CRC32C_ACCEL
250 AC_DEFUN([LIBCFS_ENABLE_CRC32C_ACCEL], [
251 LB_CHECK_CONFIG_IM([CRYPTO_CRC32C_INTEL],
252 [enable_crc32c_crypto="no"], [enable_crc32c_crypto="yes"])
253 AS_IF([test "x$enable_crc32c_crypto" = xyes], [
254 AC_DEFINE(NEED_CRC32C_ACCEL, 1, [need pclmulqdq based crc32c])
255 AC_MSG_WARN([No crc32c pclmulqdq crypto api found, enable internal pclmulqdq based crc32c])])
256 ]) # LIBCFS_ENABLE_CRC32C_ACCEL
259 # Kernel version 3.11 introduced ktime_get_ts64
261 AC_DEFUN([LIBCFS_KTIME_GET_TS64],[
262 LB_CHECK_COMPILE([does function 'ktime_get_ts64' exist],
264 #include <linux/hrtimer.h>
265 #include <linux/ktime.h>
267 struct timespec64 *ts = NULL;
271 AC_DEFINE(HAVE_KTIME_GET_TS64, 1,
272 ['ktime_get_ts64' is available])
274 ]) # LIBCFS_KTIME_GET_TS64
277 # Kernel version 3.12-rc4 commit c2d816443ef30 added prepare_to_wait_event()
279 AC_DEFUN([LIBCFS_PREPARE_TO_WAIT_EVENT],[
280 LB_CHECK_COMPILE([does function 'prepare_to_wait_event' exist],
281 prepare_to_wait_event, [
282 #include <linux/wait.h>
284 prepare_to_wait_event(NULL, NULL, 0);
286 AC_DEFINE(HAVE_PREPARE_TO_WAIT_EVENT, 1,
287 ['prepare_to_wait_event' is available])
289 ]) # LIBCFS_PREPARE_TO_WAIT_EVENT
292 # Linux kernel 3.12 introduced struct kernel_param_ops
293 # This has been backported to all lustre supported
294 # clients except RHEL6. We have to handle the differences.
296 AC_DEFUN([LIBCFS_KERNEL_PARAM_OPS],[
297 LB_CHECK_COMPILE([does 'struct kernel_param_ops' exist],
299 #include <linux/module.h>
301 struct kernel_param_ops ops;
305 AC_DEFINE(HAVE_KERNEL_PARAM_OPS, 1,
306 ['struct kernel_param_ops' is available])
308 ]) # LIBCFS_KERNEL_PARAM_OPS
311 # Kernel version 3.12 introduced ktime_add
313 AC_DEFUN([LIBCFS_KTIME_ADD],[
314 LB_CHECK_COMPILE([does function 'ktime_add' exist],
316 #include <linux/hrtimer.h>
317 #include <linux/ktime.h>
319 ktime_t start = ktime_set(0, 0);
323 total = ktime_add(start, end);
325 AC_DEFINE(HAVE_KTIME_ADD, 1,
326 [ktime_add is available])
328 ]) # LIBCFS_KTIME_ADD
331 # Kernel version 3.12 introduced ktime_after
333 AC_DEFUN([LIBCFS_KTIME_AFTER],[
334 LB_CHECK_COMPILE([does function 'ktime_after' exist],
336 #include <linux/hrtimer.h>
337 #include <linux/ktime.h>
339 ktime_t start = ktime_set(0, 0);
342 ktime_after(start, end);
344 AC_DEFINE(HAVE_KTIME_AFTER, 1,
345 [ktime_after is available])
347 ]) # LIBCFS_KTIME_AFTER
350 # Kernel version 3.12 introduced ktime_before
351 # See linux commit 67cb9366ff5f99868100198efba5ca88aaa6ad25
353 AC_DEFUN([LIBCFS_KTIME_BEFORE],[
354 LB_CHECK_COMPILE([does function 'ktime_before' exist],
356 #include <linux/hrtimer.h>
357 #include <linux/ktime.h>
359 ktime_t start = ktime_set(0, 0);
362 ktime_before(start, end);
364 AC_DEFINE(HAVE_KTIME_BEFORE, 1,
365 [ktime_before is available])
367 ]) # LIBCFS_KTIME_BEFORE
370 # Kernel version 3.12 introduced ktime_compare
372 AC_DEFUN([LIBCFS_KTIME_COMPARE],[
373 LB_CHECK_COMPILE([does function 'ktime_compare' exist],
375 #include <linux/hrtimer.h>
376 #include <linux/ktime.h>
378 ktime_t start = ktime_set(0, 0);
381 ktime_compare(start, end);
383 AC_DEFINE(HAVE_KTIME_COMPARE, 1,
384 [ktime_compare is available])
386 ]) # LIBCFS_KTIME_COMPARE
389 # FC19 3.12 kernel struct shrinker change
391 AC_DEFUN([LIBCFS_SHRINKER_COUNT],[
392 LB_CHECK_COMPILE([shrinker has 'count_objects'],
393 shrinker_count_objects, [
394 #include <linux/mmzone.h>
395 #include <linux/shrinker.h>
397 struct shrinker shrinker;
399 shrinker.count_objects = NULL;
401 AC_DEFINE(HAVE_SHRINKER_COUNT, 1,
402 [shrinker has count_objects member])
404 ]) # LIBCFS_SHRINKER_COUNT
407 # Kernel version 3.17 changed hlist_add_after to
410 AC_DEFUN([LIBCFS_HLIST_ADD_AFTER],[
411 LB_CHECK_COMPILE([does function 'hlist_add_after' exist],
413 #include <linux/list.h>
415 hlist_add_after(NULL, NULL);
417 AC_DEFINE(HAVE_HLIST_ADD_AFTER, 1,
418 [hlist_add_after is available])
420 ]) # LIBCFS_HLIST_ADD_AFTER
423 # Kernel version 3.17 introduced struct timespec64
425 AC_DEFUN([LIBCFS_TIMESPEC64],[
426 LB_CHECK_COMPILE([does 'struct timespec64' exist],
428 #include <linux/time.h>
430 struct timespec64 ts;
435 AC_DEFINE(HAVE_TIMESPEC64, 1,
436 ['struct timespec64' is available])
438 ]) # LIBCFS_TIMESPEC64
441 # Kernel version 3.17 introduced ktime_get_real_ts64
443 AC_DEFUN([LIBCFS_KTIME_GET_REAL_TS64],[
444 LB_CHECK_COMPILE([does function 'ktime_get_real_ts64' exist],
445 ktime_get_real_ts64, [
446 #include <linux/ktime.h>
448 struct timespec64 *ts = NULL;
450 ktime_get_real_ts64(ts);
452 AC_DEFINE(HAVE_KTIME_GET_REAL_TS64, 1,
453 ['ktime_get_real_ts64' is available])
455 ]) # LIBCFS_KTIME_GET_REAL_TS64
458 # Kernel version 3.17 introduced ktime_get_real_seconds
460 AC_DEFUN([LIBCFS_KTIME_GET_REAL_SECONDS],[
461 LB_CHECK_COMPILE([does function 'ktime_get_real_seconds' exist],
462 ktime_get_real_seconds, [
463 #include <linux/hrtimer.h>
464 #include <linux/ktime.h>
468 now = ktime_get_real_seconds();
470 AC_DEFINE(HAVE_KTIME_GET_REAL_SECONDS, 1,
471 ['ktime_get_real_seconds' is available])
473 ]) # LIBCFS_KTIME_GET_REAL_SECONDS
476 # Kernel version 3.17 created ktime_get_ns wrapper
478 AC_DEFUN([LIBCFS_KTIME_GET_NS],[
479 LB_CHECK_COMPILE([does function 'ktime_get_ns' exist],
481 #include <linux/hrtimer.h>
482 #include <linux/ktime.h>
486 nanoseconds = ktime_get_ns();
488 AC_DEFINE(NEED_KTIME_GET_NS, 1,
489 ['ktime_get_ns' is not available])
491 ]) # LIBCFS_KTIME_GET_NS
494 # Kernel version 3.17 created ktime_get_real_ns wrapper
496 AC_DEFUN([LIBCFS_KTIME_GET_REAL_NS],[
497 LB_CHECK_COMPILE([does function 'ktime_get_real_ns' exist],
499 #include <linux/hrtimer.h>
500 #include <linux/ktime.h>
504 nanoseconds = ktime_get_real_ns();
506 AC_DEFINE(NEED_KTIME_GET_REAL_NS, 1,
507 ['ktime_get_real_ns' is not available])
509 ]) # LIBCFS_KTIME_GET_REAL_NS
512 # Kernel version 3.17 introduced ktime_to_timespec64
514 AC_DEFUN([LIBCFS_KTIME_TO_TIMESPEC64],[
515 LB_CHECK_COMPILE([does function 'ktime_to_timespec64' exist],
516 ktime_to_timespec64, [
517 #include <linux/hrtimer.h>
518 #include <linux/ktime.h>
520 ktime_t now = ktime_set(0, 0);
521 struct timespec64 ts;
523 ts = ktime_to_timespec64(now);
525 AC_DEFINE(HAVE_KTIME_TO_TIMESPEC64, 1,
526 ['ktime_to_timespec64' is available])
528 ]) # LIBCFS_KTIME_TO_TIMESPEC64
531 # Kernel version 3.17 introduced timespec64_sub
533 AC_DEFUN([LIBCFS_TIMESPEC64_SUB],[
534 LB_CHECK_COMPILE([does function 'timespec64_sub' exist],
536 #include <linux/time.h>
538 struct timespec64 later = { }, earlier = { }, diff;
540 diff = timespec64_sub(later, earlier);
542 AC_DEFINE(HAVE_TIMESPEC64_SUB, 1,
543 ['timespec64_sub' is available])
545 ]) # LIBCFS_TIMESPEC64_SUB
548 # Kernel version 3.17 introduced timespec64_to_ktime
550 AC_DEFUN([LIBCFS_TIMESPEC64_TO_KTIME],[
551 LB_CHECK_COMPILE([does function 'timespec64_to_ktime' exist],
552 timespec64_to_ktime, [
553 #include <linux/ktime.h>
555 struct timespec64 ts;
558 now = timespec64_to_ktime(ts);
560 AC_DEFINE(HAVE_TIMESPEC64_TO_KTIME, 1,
561 ['timespec64_to_ktime' is available])
563 ]) # LIBCFS_TIMESPEC64_TO_KTIME
566 # Kernel version 3.19 introduced ktime_get_seconds
568 AC_DEFUN([LIBCFS_KTIME_GET_SECONDS],[
569 LB_CHECK_COMPILE([does function 'ktime_get_seconds' exist],
571 #include <linux/ktime.h>
575 now = ktime_get_seconds();
577 AC_DEFINE(HAVE_KTIME_GET_SECONDS, 1,
578 ['ktime_get_seconds' is available])
580 ]) # LIBCFS_KTIME_GET_SECONDS
583 # Kernel version 4.0 commit 41fbf3b39d5eca01527338b4d0ee15ee1ae1023c
584 # introduced the helper function ktime_ms_delta.
586 AC_DEFUN([LIBCFS_KTIME_MS_DELTA],[
587 LB_CHECK_COMPILE([does function 'ktime_ms_delta' exist],
589 #include <linux/ktime.h>
591 ktime_t start = ktime_set(0, 0);
594 ktime_ms_delta(start, end);
596 AC_DEFINE(HAVE_KTIME_MS_DELTA, 1,
597 ['ktime_ms_delta' is available])
599 ]) # LIBCFS_KTIME_MS_DELTA
602 # Kernel version 4.1 commit b51d23e4e9fea6f264d39535c2a62d1f51e7ccc3
603 # create per module locks which added kernel_param_[un]lock(). Older
604 # kernels you have to use __kernel_param_[un]lock(). In that case its
605 # a global lock for all modules but that is okay since its a rare event.
607 AC_DEFUN([LIBCFS_KERNEL_PARAM_LOCK],[
608 LB_CHECK_COMPILE([does function 'kernel_param_[un]lock' exist],
610 #include <linux/moduleparam.h>
612 kernel_param_lock(NULL);
613 kernel_param_unlock(NULL);
615 AC_DEFINE(HAVE_KERNEL_PARAM_LOCK, 1,
616 ['kernel_param_[un]lock' is available])
618 ]) # LIBCFS_KERNEL_PARAM_LOCK
621 # Kernel version 4.2 changed topology_thread_cpumask
622 # to topology_sibling_cpumask
624 AC_DEFUN([LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK],[
625 LB_CHECK_COMPILE([does function 'topology_sibling_cpumask' exist],
626 topology_sibling_cpumask, [
627 #include <linux/topology.h>
629 const struct cpumask *mask;
631 mask = topology_sibling_cpumask(0);
633 AC_DEFINE(HAVE_TOPOLOGY_SIBLING_CPUMASK, 1,
634 [topology_sibling_cpumask is available])
636 ]) # LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
639 # Kernel version 4.2 commit df6b35f409af0a8ff1ef62f552b8402f3fef8665
640 # header file i387.h was renamed to fpu/api.h
642 AC_DEFUN([LIBCFS_FPU_API], [
643 LB_CHECK_LINUX_HEADER([asm/fpu/api.h], [
644 AC_DEFINE(HAVE_FPU_API_HEADER, 1,
645 [fpu/api.h is present])])
649 # Kernel version 4.4 commit ef951599074ba4fad2d0efa0a977129b41e6d203
650 # introduced kstrtobool and kstrtobool_from_user.
652 AC_DEFUN([LIBCFS_KSTRTOBOOL_FROM_USER], [
653 LB_CHECK_COMPILE([if Linux kernel has 'kstrtobool_from_user'],
654 kstrtobool_from_user, [
655 #include <linux/kernel.h>
658 return kstrtobool_from_user(NULL, 0, &result);
660 AC_DEFINE(HAVE_KSTRTOBOOL_FROM_USER, 1,
661 [kernel has kstrtobool_from_user])
663 ]) # LIBCFS_KSTRTOBOOL_FROM_USER
666 # Kernel version 4.5-rc1 commit d12481bc58fba89427565f8592e88446ec084a24
667 # added crypto hash helpers
669 AC_DEFUN([LIBCFS_CRYPTO_HASH_HELPERS], [
670 LB_CHECK_COMPILE([does crypto hash helper functions exist],
671 crypto_hash_helpers, [
672 #include <crypto/hash.h>
674 crypto_ahash_alg_name(NULL);
675 crypto_ahash_driver_name(NULL);
677 AC_DEFINE(HAVE_CRYPTO_HASH_HELPERS, 1,
678 [crypto hash helper functions are available])
680 ]) # LIBCFS_CRYPTO_HASH_HELPERS
683 # Kernerl version 4.5-rc3 commit 2fe829aca9d7bed5fd6b49c6a1452e5e486b6cc3dd
684 # made kset_find_obj() exportable to modules
686 AC_DEFUN([LIBCFS_EXPORT_KSET_FIND_OBJ], [
687 LB_CHECK_EXPORT([kset_find_obj], [lib/kobject.c],
688 [AC_DEFINE(HAVE_KSET_FIND_OBJ, 1,
689 [kset_find_obj is exported by the kernel])])
690 ]) # LIBCFS_EXPORT_KSET_FIND_OBJ
693 # Kernel version 4.6+ commit ef703f49a6c5b909a85149bb6625c4ed0d697186
694 # fixed the brokenness of hash_64(). The fix removed GOLDEN_RATIO_PRIME_64
695 # since it was a poor prime value.
697 AC_DEFUN([LIBCFS_BROKEN_HASH_64], [
698 LB_CHECK_COMPILE([kernel has fixed hash_64()],
700 #include <linux/hash.h>
702 int tmp = GOLDEN_RATIO_PRIME_64;
704 AC_DEFINE(HAVE_BROKEN_HASH_64, 1, [kernel hash_64() is broken])
706 ]) # LIBCFS_BROKEN_HASH_64
709 # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
711 # linux 4.6 kernel changed stacktrace_ops address to return an int
713 AC_DEFUN([LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT], [
714 LB_CHECK_COMPILE([if 'struct stacktrace_ops' address function returns an int],
715 stacktrace_ops_address_return_int, [
716 #include <asm/stacktrace.h>
720 rc = ((struct stacktrace_ops *)0)->address(NULL, 0, 0);
722 AC_DEFINE(STACKTRACE_OPS_ADDRESS_RETURN_INT, 1,
723 ['struct stacktrace_ops' address function returns an int])
725 ]) # LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
728 # Kernel version 4.6 removed both struct task_struct and struct mm_struct
729 # arguments to get_user_pages
731 AC_DEFUN([LIBCFS_GET_USER_PAGES_6ARG], [
732 LB_CHECK_COMPILE([if 'get_user_pages()' takes 6 arguments],
733 get_user_pages_6arg, [
734 #include <linux/mm.h>
738 rc = get_user_pages(0, 0, 0, 0, NULL, NULL);
740 AC_DEFINE(HAVE_GET_USER_PAGES_6ARG, 1,
741 [get_user_pages takes 6 arguments])
743 ]) # LIBCFS_GET_USER_PAGES_6ARG
748 # 4.6 kernel created stringhash.h which moved stuff out of dcache.h
749 # commit f4bcbe792b8f434e32487cff9d9e30ab45a3ce02
751 AC_DEFUN([LIBCFS_STRINGHASH], [
752 LB_CHECK_LINUX_HEADER([linux/stringhash.h], [
753 AC_DEFINE(HAVE_STRINGHASH, 1,
754 [stringhash.h is present])])
755 ]) # LIBCFS_STRINGHASH
758 # LIBCFS_RHASHTABLE_INSERT_FAST
760 # 4.7+ kernel commit 5ca8cc5bf11faed257c762018aea9106d529232f
761 # changed __rhashtable_insert_fast to support the new function
762 # rhashtable_lookup_get_insert_key().
764 AC_DEFUN([LIBCFS_RHASHTABLE_INSERT_FAST], [
765 tmp_flags="$EXTRA_KCFLAGS"
766 EXTRA_KCFLAGS="-Werror"
767 LB_CHECK_COMPILE([if internal '__rhashtable_insert_fast()' returns int],
768 rhashtable_insert_fast, [
769 #include <linux/rhashtable.h>
771 const struct rhashtable_params params = { 0 };
774 rc = __rhashtable_insert_fast(NULL, NULL, NULL, params);
776 AC_DEFINE(HAVE_HASHTABLE_INSERT_FAST_RETURN_INT, 1,
777 ['__rhashtable_insert_fast()' returns int])
779 EXTRA_KCFLAGS="$tmp_flags"
780 ]) # LIBCFS_RHASHTABLE_INSERT_FAST
783 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
784 # introduced rhashtable_lookup
786 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP], [
787 LB_CHECK_COMPILE([if 'rhashtable_lookup' exist],
789 #include <linux/rhashtable.h>
791 const struct rhashtable_params params = { 0 };
794 ret = rhashtable_lookup(NULL, NULL, params);
796 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP, 1,
797 [rhashtable_lookup() is available])
799 ]) # LIBCFS_RHASHTABLE_LOOKUP
803 # Kernel version 4.8-rc6 commit ca26893f05e86497a86732768ec53cd38c0819ca
804 # created the rhlist interface to allow inserting duplicate objects
805 # into the same table.
807 AC_DEFUN([LIBCFS_RHLTABLE], [
808 LB_CHECK_COMPILE([does 'struct rhltable' exist],
810 #include <linux/rhashtable.h>
812 struct rhltable *hlt;
814 rhltable_destroy(hlt);
816 AC_DEFINE(HAVE_RHLTABLE, 1,
817 [struct rhltable exist])
822 # LIBCFS_STACKTRACE_OPS
824 # Kernel version 4.8 commit c8fe4609827aedc9c4b45de80e7cdc8ccfa8541b
825 # removed both struct stacktrace_ops and dump_trace() function
827 AC_DEFUN([LIBCFS_STACKTRACE_OPS], [
828 LB_CHECK_COMPILE([if 'struct stacktrace_ops' exists],
832 #include <asm/stacktrace.h>
834 struct stacktrace_ops ops;
837 AC_DEFINE(HAVE_STACKTRACE_OPS, 1,
838 [struct stacktrace_ops exists])
840 ]) # LIBCFS_STACKTRACE_OPS
843 # Kernel version 4.9 commit 768ae309a96103ed02eb1e111e838c87854d8b51
844 # mm: replace get_user_pages() write/force parameters with gup_flags
846 AC_DEFUN([LIBCFS_GET_USER_PAGES_GUP_FLAGS], [
847 LB_CHECK_COMPILE([if 'get_user_pages()' takes gup_flags in arguments],
848 get_user_pages_gup_flags, [
849 #include <linux/mm.h>
852 rc = get_user_pages(0, 0, FOLL_WRITE, NULL, NULL);
854 AC_DEFINE(HAVE_GET_USER_PAGES_GUP_FLAGS, 1,
855 [get_user_pages takes gup_flags in arguments])
857 ]) # LIBCFS_GET_USER_PAGES_GUP_FLAGS
860 # Kernel version 4.10 commit 7b737965b33188bd3dbb44e938535c4006d97fbb
861 # libcfs: Convert to hotplug state machine
863 AC_DEFUN([LIBCFS_HOTPLUG_STATE_MACHINE], [
864 LB_CHECK_COMPILE([if libcfs supports CPU hotplug state machine],
865 cpu_hotplug_state_machine, [
866 #include <linux/cpuhotplug.h>
868 cpuhp_remove_state(CPUHP_LUSTRE_CFS_DEAD);
870 AC_DEFINE(HAVE_HOTPLUG_STATE_MACHINE, 1,
871 [hotplug state machine is supported])
873 ]) # LIBCFS_HOTPLUG_STATE_MACHINE
876 # LIBCFS_SCHED_HEADERS
878 # 4.11 has broken up sched.h into more headers.
880 AC_DEFUN([LIBCFS_SCHED_HEADERS], [
881 LB_CHECK_LINUX_HEADER([linux/sched/signal.h], [
882 AC_DEFINE(HAVE_SCHED_HEADERS, 1,
883 [linux/sched header directory exist])])
884 ]) # LIBCFS_SCHED_HEADERS
887 # Kernel version 4.11 commit f9fe1c12d126f9887441fa5bb165046f30ddd4b5
888 # introduced rhashtable_lookup_get_insert_fast
890 AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
891 LB_CHECK_COMPILE([if 'rhashtable_lookup_get_insert_fast' exist],
892 rhashtable_lookup_get_insert_fast, [
893 #include <linux/rhashtable.h>
895 const struct rhashtable_params params = { 0 };
898 ret = rhashtable_lookup_get_insert_fast(NULL, NULL, params);
900 AC_DEFINE(HAVE_RHASHTABLE_LOOKUP_GET_INSERT_FAST, 1,
901 [rhashtable_lookup_get_insert_fast() is available])
903 ]) # LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
906 # Kernel version 4.12-rc3 f9727a17db9bab71ddae91f74f11a8a2f9a0ece6
907 # renamed uuid_be to uuid_t
909 AC_DEFUN([LIBCFS_UUID_T], [
910 LB_CHECK_COMPILE([if 'uuid_t' exist],
912 #include <linux/uuid.h>
916 memset(uuid.b, 0, 16);
918 AC_DEFINE(HAVE_UUID_T, 1, ['uuid_t' exist])
923 # Kernel version 4.12-rc3 commit fd851a3cdc196bfc1d229b5f22369069af532bf8
924 # introduce processor.h
926 AC_DEFUN([LIBCFS_HAVE_PROCESSOR_HEADER], [
927 LB_CHECK_LINUX_HEADER([linux/processor.h], [
928 AC_DEFINE(HAVE_PROCESSOR_H, 1,
929 [processor.h is present])])
930 ]) # LIBCFS_HAVE_PROCESSOR_HEADER
933 # Kernel verison 4.12-rc6 commit 5dd43ce2f69d42a71dcacdb13d17d8c0ac1fe8f7
936 AC_DEFUN([LIBCFS_HAVE_WAIT_BIT_HEADER], [
937 LB_CHECK_LINUX_HEADER([linux/wait_bit.h], [
938 AC_DEFINE(HAVE_WAIT_BIT_HEADER_H, 1,
939 [wait_bit.h is present])])
940 ]) # LIBCFS_HAVE_WAIT_BIT_HEADER
943 # Kernel version 4.12-rc6 commmit 2055da97389a605c8a00d163d40903afbe413921
945 # struct wait_queue_head::task_list => ::head
946 # struct wait_queue_entry::task_list => ::entry
948 AC_DEFUN([LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME], [
949 LB_CHECK_COMPILE([if linux wait_queue_head list_head is named head],
950 wait_queue_task_list, [
951 #include <linux/wait.h>
955 INIT_LIST_HEAD(&e.head);
957 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY_LIST, 1,
958 [linux wait_queue_head_t list_head is name head])
960 ]) # LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
963 # LIBCFS_WAIT_QUEUE_ENTRY
965 # Kernel version 4.13 ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f
966 # Rename wait_queue_t => wait_queue_entry_t
968 AC_DEFUN([LIBCFS_WAIT_QUEUE_ENTRY], [
969 LB_CHECK_COMPILE([if 'wait_queue_entry_t' exists],
971 #include <linux/wait.h>
973 wait_queue_entry_t e;
977 AC_DEFINE(HAVE_WAIT_QUEUE_ENTRY, 1,
978 ['wait_queue_entry_t' is available])
980 ]) # LIBCFS_WAIT_QUEUE_ENTRY
983 # LIBCFS_NEW_KERNEL_WRITE
985 # Kernel version 4.14 e13ec939e96b13e664bb6cee361cc976a0ee621a
986 # changed kernel_write prototype to make is plug compatible
987 # with the unexported vfs_write()
989 AC_DEFUN([LIBCFS_NEW_KERNEL_WRITE], [
990 tmp_flags="$EXTRA_KCFLAGS"
991 EXTRA_KCFLAGS="-Werror"
992 LB_CHECK_COMPILE([if 'kernel_write' matches other read/write helpers],
993 kernel_write_match, [
994 #include <linux/fs.h>
996 const void *buf = NULL;
998 return kernel_write(NULL, buf, 0, &pos);
1000 AC_DEFINE(HAVE_NEW_KERNEL_WRITE, 1,
1001 ['kernel_write' aligns with read/write helpers])
1003 EXTRA_KCFLAGS="$tmp_flags"
1004 ]) # LIBCFS_NEW_KERNEL_WRITE
1007 # LIBCFS_NEW_KERNEL_WRITE
1009 # 4.14 commit bdd1d2d3d251c65b74ac4493e08db18971c09240 changed
1010 # the signature of kernel_read to match other read/write helpers
1011 # and place offset last.
1013 AC_DEFUN([LIBCFS_NEW_KERNEL_READ], [
1014 tmp_flags="$EXTRA_KCFLAGS"
1015 EXTRA_KCFLAGS="-Werror"
1016 LB_CHECK_COMPILE([if 'kernel_read()' has loff_t *pos as last parameter],
1018 #include <linux/fs.h>
1021 kernel_read(NULL, NULL, 0, &pos);
1023 AC_DEFINE(HAVE_KERNEL_READ_LAST_POSP, 1,
1024 [kernel_read() signature ends with loff_t *pos])
1026 EXTRA_KCFLAGS="$tmp_flags"
1027 ]) # LIBCFS_NEW_KERNEL_READ
1030 # LIBCFS_DEFINE_TIMER
1032 # Kernel version 4.14 commit 1d27e3e2252ba9d949ca82fbdb73cde102cb2067
1033 # remove expires and data arguments from DEFINE_TIMER. Also the callback
1034 # when from using unsigned long argument to using struct timer_list pointer.
1036 AC_DEFUN([LIBCFS_DEFINE_TIMER], [
1037 LB_CHECK_COMPILE([if DEFINE_TIMER takes only 2 arguments],
1039 #include <linux/timer.h>
1041 static DEFINE_TIMER(my_timer, NULL);
1043 AC_DEFINE(HAVE_NEW_DEFINE_TIMER, 1,
1044 [DEFINE_TIMER uses only 2 arguements])
1046 ]) # LIBCFS_DEFINE_TIMER
1049 # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1051 # Kernel 2.6.27 commit 8594698ebddeef5443b7da8258ae33b3eaca61d5
1052 # exported save_stack_trace_tsk for x86.
1053 # Kernel 2.6.27 commit 01f4b8b8b8db09b88be7df7e51192e4e678b69d3
1054 # exported save_stack_trace_tsk for powerpc
1055 # Kernel 4.13 commit e27c7fa015d61c8be6a2c32b2144aad2ae6ec975
1056 # exported save_stack_trace_tsk for arm64
1057 # Kernel 4.14 commit 9a3dc3186fc3795e076a4122da9e0258651a9631
1058 # exported save_stack_trace_tsk for arm
1060 AC_DEFUN([LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK], [
1061 LB_CHECK_EXPORT([save_stack_trace_tsk], [arch/$SUBARCH/kernel/stacktrace.c],
1062 [AC_DEFINE(HAVE_SAVE_STACK_TRACE_TSK, 1,
1063 [save_stack_trace_tsk is exported])])
1064 ]) # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1067 # LIBCFS_TIMER_SETUP
1069 # Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
1070 # setup_timer() was replaced by timer_setup(), where the callback
1071 # argument is the structure already holding the struct timer_list.
1073 AC_DEFUN([LIBCFS_TIMER_SETUP], [
1074 LB_CHECK_COMPILE([if setup_timer has been replaced with timer_setup],
1076 #include <linux/timer.h>
1078 timer_setup(NULL, NULL, 0);
1080 AC_DEFINE(HAVE_TIMER_SETUP, 1,
1081 [timer_setup has replaced setup_timer])
1083 ]) # LIBCFS_TIMER_SETUP
1086 # LIBCFS_WAIT_VAR_EVENT
1088 # Kernel version 4.16-rc4 commit 6b2bb7265f0b62605e8caee3613449ed0db270b9
1089 # added wait_var_event()
1091 AC_DEFUN([LIBCFS_WAIT_VAR_EVENT], [
1092 LB_CHECK_COMPILE([if 'wait_var_event' exist],
1094 #ifdef HAVE_WAIT_BIT_HEADER_H
1095 #include <linux/wait_bit.h>
1097 #include <linux/wait.h>
1101 AC_DEFINE(HAVE_WAIT_VAR_EVENT, 1,
1102 ['wait_var_event' is available])
1104 ]) # LIBCFS_WAIT_VAR_EVENT
1107 # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1109 # Kernel version 4.17-rc2 commit 8236b0ae31c837d2b3a2565c5f8d77f637e824cc
1110 # added clear_and_wake_up_bit()
1112 AC_DEFUN([LIBCFS_CLEAR_AND_WAKE_UP_BIT], [
1113 LB_CHECK_COMPILE([if 'clear_and_wake_up_bit' exist],
1114 clear_and_wake_up_bit, [
1115 #ifdef HAVE_WAIT_BIT_HEADER_H
1116 #include <linux/wait_bit.h>
1118 #include <linux/wait.h>
1120 clear_and_wake_up_bit(0, NULL);
1122 AC_DEFINE(HAVE_CLEAR_AND_WAKE_UP_BIT, 1,
1123 ['clear_and_wake_up_bit' is available])
1125 ]) # LIBCFS_CLEAR_AND_WAKE_UP_BIT
1130 # LibCFS linux kernel checks
1132 AC_DEFUN([LIBCFS_PROG_LINUX], [
1133 AC_MSG_NOTICE([LibCFS kernel checks
1134 ==============================================================================])
1135 LIBCFS_CONFIG_PANIC_DUMPLOG
1138 LIBCFS_STACKTRACE_OPS_HAVE_WALK_STACK
1139 LC_SHRINKER_WANT_SHRINK_PTR
1141 LIBCFS_SYSCTL_CTLNAME
1143 LIBCFS_MODULE_LOCKING
1147 LIBCFS_DUMP_TRACE_ADDRESS
1151 LIBCFS_STACKTRACE_WARNING
1153 LIBCFS_PROCESS_NAMESPACE
1157 LIBCFS_ENABLE_CRC32_ACCEL
1159 LIBCFS_ENABLE_CRC32C_ACCEL
1161 LIBCFS_KTIME_GET_TS64
1163 LIBCFS_PREPARE_TO_WAIT_EVENT
1164 LIBCFS_KERNEL_PARAM_OPS
1168 LIBCFS_KTIME_COMPARE
1169 LIBCFS_SHRINKER_COUNT
1171 LIBCFS_HLIST_ADD_AFTER
1174 LIBCFS_KTIME_GET_REAL_TS64
1175 LIBCFS_KTIME_GET_REAL_SECONDS
1176 LIBCFS_KTIME_GET_REAL_NS
1177 LIBCFS_KTIME_TO_TIMESPEC64
1178 LIBCFS_TIMESPEC64_SUB
1179 LIBCFS_TIMESPEC64_TO_KTIME
1181 LIBCFS_KTIME_GET_SECONDS
1183 LIBCFS_KTIME_MS_DELTA
1185 LIBCFS_KERNEL_PARAM_LOCK
1187 LIBCFS_HAVE_TOPOLOGY_SIBLING_CPUMASK
1190 LIBCFS_KSTRTOBOOL_FROM_USER
1192 LIBCFS_CRYPTO_HASH_HELPERS
1193 LIBCFS_EXPORT_KSET_FIND_OBJ
1195 LIBCFS_BROKEN_HASH_64
1196 LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
1197 LIBCFS_GET_USER_PAGES_6ARG
1200 LIBCFS_RHASHTABLE_INSERT_FAST
1202 LIBCFS_RHASHTABLE_LOOKUP
1204 LIBCFS_STACKTRACE_OPS
1206 LIBCFS_GET_USER_PAGES_GUP_FLAGS
1208 LIBCFS_HOTPLUG_STATE_MACHINE
1210 LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
1211 LIBCFS_SCHED_HEADERS
1213 LIBCFS_HAVE_PROCESSOR_HEADER
1214 LIBCFS_HAVE_WAIT_BIT_HEADER
1215 LIBCFS_WAIT_QUEUE_TASK_LIST_RENAME
1218 LIBCFS_WAIT_QUEUE_ENTRY
1221 LIBCFS_NEW_KERNEL_WRITE
1222 LIBCFS_NEW_KERNEL_READ
1223 LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
1227 LIBCFS_WAIT_VAR_EVENT
1229 LIBCFS_CLEAR_AND_WAKE_UP_BIT
1230 ]) # LIBCFS_PROG_LINUX
1233 # LIBCFS_PATH_DEFAULTS
1235 # default paths for installed files
1237 AC_DEFUN([LIBCFS_PATH_DEFAULTS], [
1238 ]) # LIBCFS_PATH_DEFAULTS
1243 # other configure checks
1245 AC_DEFUN([LIBCFS_CONFIGURE], [
1246 AC_MSG_NOTICE([LibCFS core checks
1247 ==============================================================================])
1249 # libcfs/libcfs/util/nidstrings.c
1250 AC_CHECK_HEADERS([netdb.h asm/types.h endian.h])
1251 AC_CHECK_FUNCS([gethostbyname])
1253 # -------- Check for required packages --------------
1255 AC_MSG_NOTICE([LibCFS required packages checks
1256 ==============================================================================])
1258 AC_MSG_CHECKING([whether to enable readline support])
1259 AC_ARG_ENABLE(readline,
1260 AC_HELP_STRING([--disable-readline],
1261 [disable readline support]),
1262 [], [enable_readline="yes"])
1263 AC_MSG_RESULT([$enable_readline])
1266 AS_IF([test "x$enable_readline" = xyes], [
1267 AC_CHECK_LIB([readline], [readline], [
1268 LIBREADLINE="-lreadline"
1269 AC_DEFINE(HAVE_LIBREADLINE, 1,
1270 [readline library is available])
1273 AC_SUBST(LIBREADLINE)
1275 AC_MSG_CHECKING([whether to use libpthread for libcfs library])
1276 AC_ARG_ENABLE([libpthread],
1277 AC_HELP_STRING([--disable-libpthread],
1278 [disable libpthread]),
1279 [], [enable_libpthread="yes"])
1280 AC_MSG_RESULT([$enable_libpthread])
1283 AS_IF([test "x$enable_libpthread" = xyes], [
1284 AC_CHECK_LIB([pthread], [pthread_create], [
1285 PTHREAD_LIBS="-lpthread"
1286 AC_DEFINE([HAVE_LIBPTHREAD], 1,
1287 [use libpthread for libcfs library])
1290 AC_MSG_WARN([Using libpthread for libcfs library is disabled explicitly])
1292 AC_SUBST(PTHREAD_LIBS)
1293 ]) # LIBCFS_CONFIGURE
1296 # LIBCFS_CONDITIONALS
1298 AC_DEFUN([LIBCFS_CONDITIONALS], [
1299 AM_CONDITIONAL(HAVE_CRC32, [test "x$have_crc32" = xyes])
1300 AM_CONDITIONAL(NEED_PCLMULQDQ_CRC32, [test "x$have_crc32" = xyes -a "x$enable_crc32_crypto" = xyes])
1301 AM_CONDITIONAL(NEED_PCLMULQDQ_CRC32C, [test "x$enable_crc32c_crypto" = xyes])
1302 ]) # LIBCFS_CONDITIONALS
1305 # LIBCFS_CONFIG_FILES
1307 # files that should be generated with AC_OUTPUT
1309 AC_DEFUN([LIBCFS_CONFIG_FILES], [
1313 libcfs/autoconf/Makefile
1314 libcfs/include/Makefile
1315 libcfs/include/libcfs/Makefile
1316 libcfs/include/libcfs/linux/Makefile
1317 libcfs/include/libcfs/util/Makefile
1318 libcfs/libcfs/Makefile
1319 libcfs/libcfs/autoMakefile
1320 libcfs/libcfs/linux/Makefile
1321 libcfs/libcfs/util/Makefile
1323 ]) # LIBCFS_CONFIG_FILES