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1 ###############################################################################
2 # Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
3 # Copyright (C) 2007 The Regents of the University of California.
4 # Written by Brian Behlendorf <behlendorf1@llnl.gov>.
5 ###############################################################################
6 # SPL_AC_CONFIG_KERNEL: Default SPL kernel configuration.
7 ###############################################################################
8
9 AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
10 SPL_AC_KERNEL
11
12 if test "${LINUX_OBJ}" != "${LINUX}"; then
13 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
14 fi
15 AC_SUBST(KERNELMAKE_PARAMS)
16
17 KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
18 AC_SUBST(KERNELCPPFLAGS)
19
20 SPL_AC_DEBUG
21 SPL_AC_DEBUG_KMEM
22 SPL_AC_DEBUG_KMEM_TRACKING
23 SPL_AC_TEST_MODULE
24 SPL_AC_ATOMIC_SPINLOCK
25 SPL_AC_SHRINKER_CALLBACK
26 SPL_AC_CTL_NAME
27 SPL_AC_CONFIG_TRIM_UNUSED_KSYMS
28 SPL_AC_PDE_DATA
29 SPL_AC_SET_FS_PWD_WITH_CONST
30 SPL_AC_2ARGS_VFS_UNLINK
31 SPL_AC_4ARGS_VFS_RENAME
32 SPL_AC_2ARGS_VFS_FSYNC
33 SPL_AC_INODE_TRUNCATE_RANGE
34 SPL_AC_FS_STRUCT_SPINLOCK
35 SPL_AC_KUIDGID_T
36 SPL_AC_KERNEL_FALLOCATE
37 SPL_AC_CONFIG_ZLIB_INFLATE
38 SPL_AC_CONFIG_ZLIB_DEFLATE
39 SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
40 SPL_AC_SHRINK_CONTROL_STRUCT
41 SPL_AC_RWSEM_SPINLOCK_IS_RAW
42 SPL_AC_RWSEM_ACTIVITY
43 SPL_AC_RWSEM_ATOMIC_LONG_COUNT
44 SPL_AC_SCHED_RT_HEADER
45 SPL_AC_SCHED_SIGNAL_HEADER
46 SPL_AC_4ARGS_VFS_GETATTR
47 SPL_AC_3ARGS_VFS_GETATTR
48 SPL_AC_2ARGS_VFS_GETATTR
49 SPL_AC_USLEEP_RANGE
50 SPL_AC_KMEM_CACHE_ALLOCFLAGS
51 SPL_AC_WAIT_ON_BIT
52 SPL_AC_INODE_LOCK
53 SPL_AC_MUTEX_OWNER
54 SPL_AC_GROUP_INFO_GID
55 ])
56
57 AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
58 modpost=$LINUX/scripts/Makefile.modpost
59 AC_MSG_CHECKING([kernel file name for module symbols])
60 if test "x$enable_linux_builtin" != xyes -a -f "$modpost"; then
61 if grep -q Modules.symvers $modpost; then
62 LINUX_SYMBOLS=Modules.symvers
63 else
64 LINUX_SYMBOLS=Module.symvers
65 fi
66
67 if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
68 AC_MSG_ERROR([
69 *** Please make sure the kernel devel package for your distribution
70 *** is installed. If you are building with a custom kernel, make sure the
71 *** kernel is configured, built, and the '--with-linux=PATH' configure
72 *** option refers to the location of the kernel source.])
73 fi
74 else
75 LINUX_SYMBOLS=NONE
76 fi
77 AC_MSG_RESULT($LINUX_SYMBOLS)
78 AC_SUBST(LINUX_SYMBOLS)
79 ])
80
81 AC_DEFUN([SPL_AC_KERNEL], [
82 AC_ARG_WITH([linux],
83 AS_HELP_STRING([--with-linux=PATH],
84 [Path to kernel source]),
85 [kernelsrc="$withval"])
86
87 AC_ARG_WITH([linux-obj],
88 AS_HELP_STRING([--with-linux-obj=PATH],
89 [Path to kernel build objects]),
90 [kernelbuild="$withval"])
91
92 AC_MSG_CHECKING([kernel source directory])
93 if test -z "$kernelsrc"; then
94 if test -e "/lib/modules/$(uname -r)/source"; then
95 headersdir="/lib/modules/$(uname -r)/source"
96 sourcelink=$(readlink -f "$headersdir")
97 elif test -e "/lib/modules/$(uname -r)/build"; then
98 headersdir="/lib/modules/$(uname -r)/build"
99 sourcelink=$(readlink -f "$headersdir")
100 else
101 sourcelink=$(ls -1d /usr/src/kernels/* \
102 /usr/src/linux-* \
103 2>/dev/null | grep -v obj | tail -1)
104 fi
105
106 if test -n "$sourcelink" && test -e ${sourcelink}; then
107 kernelsrc=`readlink -f ${sourcelink}`
108 else
109 kernelsrc="[Not found]"
110 fi
111 else
112 if test "$kernelsrc" = "NONE"; then
113 kernsrcver=NONE
114 fi
115 fi
116
117 AC_MSG_RESULT([$kernelsrc])
118 if test ! -d "$kernelsrc"; then
119 AC_MSG_ERROR([
120 *** Please make sure the kernel devel package for your distribution
121 *** is installed and then try again. If that fails, you can specify the
122 *** location of the kernel source with the '--with-linux=PATH' option.])
123 fi
124
125 AC_MSG_CHECKING([kernel build directory])
126 if test -z "$kernelbuild"; then
127 if test -e "/lib/modules/$(uname -r)/build"; then
128 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
129 elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
130 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
131 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
132 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
133 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
134 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
135 else
136 kernelbuild=${kernelsrc}
137 fi
138 fi
139 AC_MSG_RESULT([$kernelbuild])
140
141 AC_MSG_CHECKING([kernel source version])
142 utsrelease1=$kernelbuild/include/linux/version.h
143 utsrelease2=$kernelbuild/include/linux/utsrelease.h
144 utsrelease3=$kernelbuild/include/generated/utsrelease.h
145 if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
146 utsrelease=linux/version.h
147 elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
148 utsrelease=linux/utsrelease.h
149 elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
150 utsrelease=generated/utsrelease.h
151 fi
152
153 if test "$utsrelease"; then
154 kernsrcver=`(echo "#include <$utsrelease>";
155 echo "kernsrcver=UTS_RELEASE") |
156 cpp -I $kernelbuild/include |
157 grep "^kernsrcver=" | cut -d \" -f 2`
158
159 if test -z "$kernsrcver"; then
160 AC_MSG_RESULT([Not found])
161 AC_MSG_ERROR([*** Cannot determine kernel version.])
162 fi
163 else
164 AC_MSG_RESULT([Not found])
165 if test "x$enable_linux_builtin" != xyes; then
166 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
167 else
168 AC_MSG_ERROR([
169 *** Cannot find UTS_RELEASE definition.
170 *** Please run 'make prepare' inside the kernel source tree.])
171 fi
172 fi
173
174 AC_MSG_RESULT([$kernsrcver])
175
176 LINUX=${kernelsrc}
177 LINUX_OBJ=${kernelbuild}
178 LINUX_VERSION=${kernsrcver}
179
180 AC_SUBST(LINUX)
181 AC_SUBST(LINUX_OBJ)
182 AC_SUBST(LINUX_VERSION)
183
184 SPL_AC_MODULE_SYMVERS
185 ])
186
187 dnl #
188 dnl # Default SPL user configuration
189 dnl #
190 AC_DEFUN([SPL_AC_CONFIG_USER], [])
191
192 dnl #
193 dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
194 dnl # are missing, it is non-fatal, but you will not be able to build
195 dnl # RPM packages and will be warned if you try too.
196 dnl #
197 dnl # By default, the generic spec file will be used because it requires
198 dnl # minimal dependencies. Distribution specific spec files can be
199 dnl # placed under the 'rpm/<distribution>' directory and enabled using
200 dnl # the --with-spec=<distribution> configure option.
201 dnl #
202 AC_DEFUN([SPL_AC_RPM], [
203 RPM=rpm
204 RPMBUILD=rpmbuild
205
206 AC_MSG_CHECKING([whether $RPM is available])
207 AS_IF([tmp=$($RPM --version 2>/dev/null)], [
208 RPM_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
209 HAVE_RPM=yes
210 AC_MSG_RESULT([$HAVE_RPM ($RPM_VERSION)])
211 ],[
212 HAVE_RPM=no
213 AC_MSG_RESULT([$HAVE_RPM])
214 ])
215
216 AC_MSG_CHECKING([whether $RPMBUILD is available])
217 AS_IF([tmp=$($RPMBUILD --version 2>/dev/null)], [
218 RPMBUILD_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
219 HAVE_RPMBUILD=yes
220 AC_MSG_RESULT([$HAVE_RPMBUILD ($RPMBUILD_VERSION)])
221 ],[
222 HAVE_RPMBUILD=no
223 AC_MSG_RESULT([$HAVE_RPMBUILD])
224 ])
225
226 RPM_DEFINE_COMMON='--define "$(DEBUG_SPL) 1" --define "$(DEBUG_KMEM) 1" --define "$(DEBUG_KMEM_TRACKING) 1"'
227 RPM_DEFINE_UTIL=
228 RPM_DEFINE_KMOD='--define "kernels $(LINUX_VERSION)"'
229 RPM_DEFINE_DKMS=
230
231 SRPM_DEFINE_COMMON='--define "build_src_rpm 1"'
232 SRPM_DEFINE_UTIL=
233 SRPM_DEFINE_KMOD=
234 SRPM_DEFINE_DKMS=
235
236 RPM_SPEC_DIR="rpm/generic"
237 AC_ARG_WITH([spec],
238 AS_HELP_STRING([--with-spec=SPEC],
239 [Spec files 'generic|redhat']),
240 [RPM_SPEC_DIR="rpm/$withval"])
241
242 AC_MSG_CHECKING([whether spec files are available])
243 AC_MSG_RESULT([yes ($RPM_SPEC_DIR/*.spec.in)])
244
245 AC_SUBST(HAVE_RPM)
246 AC_SUBST(RPM)
247 AC_SUBST(RPM_VERSION)
248
249 AC_SUBST(HAVE_RPMBUILD)
250 AC_SUBST(RPMBUILD)
251 AC_SUBST(RPMBUILD_VERSION)
252
253 AC_SUBST(RPM_SPEC_DIR)
254 AC_SUBST(RPM_DEFINE_UTIL)
255 AC_SUBST(RPM_DEFINE_KMOD)
256 AC_SUBST(RPM_DEFINE_DKMS)
257 AC_SUBST(RPM_DEFINE_COMMON)
258 AC_SUBST(SRPM_DEFINE_UTIL)
259 AC_SUBST(SRPM_DEFINE_KMOD)
260 AC_SUBST(SRPM_DEFINE_DKMS)
261 AC_SUBST(SRPM_DEFINE_COMMON)
262 ])
263
264 dnl #
265 dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
266 dnl # tools are missing it is non-fatal but you will not be able to build
267 dnl # DEB packages and will be warned if you try too.
268 dnl #
269 AC_DEFUN([SPL_AC_DPKG], [
270 DPKG=dpkg
271 DPKGBUILD=dpkg-buildpackage
272
273 AC_MSG_CHECKING([whether $DPKG is available])
274 AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
275 DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
276 HAVE_DPKG=yes
277 AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
278 ],[
279 HAVE_DPKG=no
280 AC_MSG_RESULT([$HAVE_DPKG])
281 ])
282
283 AC_MSG_CHECKING([whether $DPKGBUILD is available])
284 AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
285 DPKGBUILD_VERSION=$(echo $tmp | \
286 $AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
287 HAVE_DPKGBUILD=yes
288 AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
289 ],[
290 HAVE_DPKGBUILD=no
291 AC_MSG_RESULT([$HAVE_DPKGBUILD])
292 ])
293
294 AC_SUBST(HAVE_DPKG)
295 AC_SUBST(DPKG)
296 AC_SUBST(DPKG_VERSION)
297
298 AC_SUBST(HAVE_DPKGBUILD)
299 AC_SUBST(DPKGBUILD)
300 AC_SUBST(DPKGBUILD_VERSION)
301 ])
302
303 dnl #
304 dnl # Until native packaging for various different packing systems
305 dnl # can be added the least we can do is attempt to use alien to
306 dnl # convert the RPM packages to the needed package type. This is
307 dnl # a hack but so far it has worked reasonable well.
308 dnl #
309 AC_DEFUN([SPL_AC_ALIEN], [
310 ALIEN=alien
311
312 AC_MSG_CHECKING([whether $ALIEN is available])
313 AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
314 ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
315 HAVE_ALIEN=yes
316 AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
317 ],[
318 HAVE_ALIEN=no
319 AC_MSG_RESULT([$HAVE_ALIEN])
320 ])
321
322 AC_SUBST(HAVE_ALIEN)
323 AC_SUBST(ALIEN)
324 AC_SUBST(ALIEN_VERSION)
325 ])
326
327 dnl #
328 dnl # Using the VENDOR tag from config.guess set the default
329 dnl # package type for 'make pkg': (rpm | deb | tgz)
330 dnl #
331 AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
332 AC_MSG_CHECKING([linux distribution])
333 if test -f /etc/toss-release ; then
334 VENDOR=toss ;
335 elif test -f /etc/fedora-release ; then
336 VENDOR=fedora ;
337 elif test -f /etc/redhat-release ; then
338 VENDOR=redhat ;
339 elif test -f /etc/gentoo-release ; then
340 VENDOR=gentoo ;
341 elif test -f /etc/arch-release ; then
342 VENDOR=arch ;
343 elif test -f /etc/SuSE-release ; then
344 VENDOR=sles ;
345 elif test -f /etc/slackware-version ; then
346 VENDOR=slackware ;
347 elif test -f /etc/lunar.release ; then
348 VENDOR=lunar ;
349 elif test -f /etc/lsb-release ; then
350 VENDOR=ubuntu ;
351 elif test -f /etc/debian_version ; then
352 VENDOR=debian ;
353 else
354 VENDOR= ;
355 fi
356 AC_MSG_RESULT([$VENDOR])
357 AC_SUBST(VENDOR)
358
359 AC_MSG_CHECKING([default package type])
360 case "$VENDOR" in
361 toss) DEFAULT_PACKAGE=rpm ;;
362 redhat) DEFAULT_PACKAGE=rpm ;;
363 fedora) DEFAULT_PACKAGE=rpm ;;
364 gentoo) DEFAULT_PACKAGE=tgz ;;
365 arch) DEFAULT_PACKAGE=tgz ;;
366 sles) DEFAULT_PACKAGE=rpm ;;
367 slackware) DEFAULT_PACKAGE=tgz ;;
368 lunar) DEFAULT_PACKAGE=tgz ;;
369 ubuntu) DEFAULT_PACKAGE=deb ;;
370 debian) DEFAULT_PACKAGE=deb ;;
371 *) DEFAULT_PACKAGE=rpm ;;
372 esac
373
374 AC_MSG_RESULT([$DEFAULT_PACKAGE])
375 AC_SUBST(DEFAULT_PACKAGE)
376 ])
377
378 dnl #
379 dnl # Default SPL user configuration
380 dnl #
381 AC_DEFUN([SPL_AC_PACKAGE], [
382 SPL_AC_DEFAULT_PACKAGE
383 SPL_AC_RPM
384 SPL_AC_DPKG
385 SPL_AC_ALIEN
386 ])
387
388 AC_DEFUN([SPL_AC_LICENSE], [
389 AC_MSG_CHECKING([spl author])
390 AC_MSG_RESULT([$SPL_META_AUTHOR])
391
392 AC_MSG_CHECKING([spl license])
393 AC_MSG_RESULT([$SPL_META_LICENSE])
394 ])
395
396 AC_DEFUN([SPL_AC_CONFIG], [
397 SPL_CONFIG=all
398 AC_ARG_WITH([config],
399 AS_HELP_STRING([--with-config=CONFIG],
400 [Config file 'kernel|user|all|srpm']),
401 [SPL_CONFIG="$withval"])
402 AC_ARG_ENABLE([linux-builtin],
403 [AC_HELP_STRING([--enable-linux-builtin],
404 [Configure for builtin in-tree kernel modules @<:@default=no@:>@])],
405 [],
406 [enable_linux_builtin=no])
407
408 AC_MSG_CHECKING([spl config])
409 AC_MSG_RESULT([$SPL_CONFIG]);
410 AC_SUBST(SPL_CONFIG)
411
412 case "$SPL_CONFIG" in
413 kernel) SPL_AC_CONFIG_KERNEL ;;
414 user) SPL_AC_CONFIG_USER ;;
415 all) SPL_AC_CONFIG_KERNEL
416 SPL_AC_CONFIG_USER ;;
417 srpm) ;;
418 *)
419 AC_MSG_RESULT([Error!])
420 AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
421 user kernel|user|all|srpm]) ;;
422 esac
423
424 AM_CONDITIONAL([CONFIG_USER],
425 [test "$SPL_CONFIG" = user -o "$SPL_CONFIG" = all])
426 AM_CONDITIONAL([CONFIG_KERNEL],
427 [test "$SPL_CONFIG" = kernel -o "$SPL_CONFIG" = all] &&
428 [test "x$enable_linux_builtin" != xyes ])
429 ])
430
431 dnl #
432 dnl # Enable if the SPL should be compiled with internal debugging enabled.
433 dnl # By default this support is disabled.
434 dnl #
435 AC_DEFUN([SPL_AC_DEBUG], [
436 AC_MSG_CHECKING([whether debugging is enabled])
437 AC_ARG_ENABLE([debug],
438 [AS_HELP_STRING([--enable-debug],
439 [Enable generic debug support @<:@default=no@:>@])],
440 [],
441 [enable_debug=no])
442
443 AS_IF([test "x$enable_debug" = xyes],
444 [
445 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
446 DEBUG_CFLAGS="-DDEBUG -Werror"
447 DEBUG_SPL="_with_debug"
448 ], [
449 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
450 DEBUG_CFLAGS="-DNDEBUG"
451 DEBUG_SPL="_without_debug"
452 ])
453
454 AC_SUBST(DEBUG_CFLAGS)
455 AC_SUBST(DEBUG_SPL)
456 AC_MSG_RESULT([$enable_debug])
457 ])
458
459 dnl #
460 dnl # Enabled by default it provides a minimal level of memory tracking.
461 dnl # A total count of bytes allocated is kept for each alloc and free.
462 dnl # Then at module unload time a report to the console will be printed
463 dnl # if memory was leaked.
464 dnl #
465 AC_DEFUN([SPL_AC_DEBUG_KMEM], [
466 AC_ARG_ENABLE([debug-kmem],
467 [AS_HELP_STRING([--enable-debug-kmem],
468 [Enable basic kmem accounting @<:@default=no@:>@])],
469 [],
470 [enable_debug_kmem=no])
471
472 AS_IF([test "x$enable_debug_kmem" = xyes],
473 [
474 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
475 DEBUG_KMEM="_with_debug_kmem"
476 AC_DEFINE([DEBUG_KMEM], [1],
477 [Define to 1 to enable basic kmem accounting])
478 ], [
479 DEBUG_KMEM="_without_debug_kmem"
480 ])
481
482 AC_SUBST(DEBUG_KMEM)
483 AC_MSG_CHECKING([whether basic kmem accounting is enabled])
484 AC_MSG_RESULT([$enable_debug_kmem])
485 ])
486
487 dnl #
488 dnl # Disabled by default it provides detailed memory tracking. This
489 dnl # feature also requires --enable-debug-kmem to be set. When enabled
490 dnl # not only will total bytes be tracked but also the location of every
491 dnl # alloc and free. When the SPL module is unloaded a list of all leaked
492 dnl # addresses and where they were allocated will be dumped to the console.
493 dnl # Enabling this feature has a significant impact on performance but it
494 dnl # makes finding memory leaks pretty straight forward.
495 dnl #
496 AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
497 AC_ARG_ENABLE([debug-kmem-tracking],
498 [AS_HELP_STRING([--enable-debug-kmem-tracking],
499 [Enable detailed kmem tracking @<:@default=no@:>@])],
500 [],
501 [enable_debug_kmem_tracking=no])
502
503 AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
504 [
505 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"
506 DEBUG_KMEM_TRACKING="_with_debug_kmem_tracking"
507 AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
508 [Define to 1 to enable detailed kmem tracking])
509 ], [
510 DEBUG_KMEM_TRACKING="_without_debug_kmem_tracking"
511 ])
512
513 AC_SUBST(DEBUG_KMEM_TRACKING)
514 AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
515 AC_MSG_RESULT([$enable_debug_kmem_tracking])
516 ])
517
518 dnl #
519 dnl # SPL_LINUX_CONFTEST
520 dnl #
521 AC_DEFUN([SPL_LINUX_CONFTEST], [
522 cat confdefs.h - <<_ACEOF >conftest.c
523 $1
524 _ACEOF
525 ])
526
527 dnl #
528 dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
529 dnl #
530 m4_define([SPL_LANG_PROGRAM], [
531 $1
532 int
533 main (void)
534 {
535 dnl Do *not* indent the following line: there may be CPP directives.
536 dnl Don't move the `;' right after for the same reason.
537 $2
538 ;
539 return 0;
540 }
541 ])
542
543 dnl #
544 dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
545 dnl #
546 AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
547 m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
548 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
549 echo "obj-m := conftest.o" >build/Makefile
550 modpost_flag=''
551 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
552 AS_IF(
553 [AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
554 [$4],
555 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
556 )
557 rm -Rf build
558 ])
559
560 dnl #
561 dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
562 dnl #
563 AC_DEFUN([SPL_LINUX_TRY_COMPILE],
564 [SPL_LINUX_COMPILE_IFELSE(
565 [AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
566 [modules],
567 [test -s build/conftest.o],
568 [$3], [$4])
569 ])
570
571 dnl #
572 dnl # SPL_CHECK_SYMBOL_EXPORT
573 dnl # check symbol exported or not
574 dnl #
575 AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT], [
576 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
577 $LINUX_OBJ/Module*.symvers 2>/dev/null
578 rc=$?
579 if test $rc -ne 0; then
580 export=0
581 for file in $2; do
582 grep -q -E "EXPORT_SYMBOL.*($1)" \
583 "$LINUX_OBJ/$file" 2>/dev/null
584 rc=$?
585 if test $rc -eq 0; then
586 export=1
587 break;
588 fi
589 done
590 if test $export -eq 0; then :
591 $4
592 else :
593 $3
594 fi
595 else :
596 $3
597 fi
598 ])
599
600 dnl #
601 dnl # SPL_LINUX_TRY_COMPILE_SYMBOL
602 dnl # like SPL_LINUX_TRY_COMPILE, except SPL_CHECK_SYMBOL_EXPORT
603 dnl # is called if not compiling for builtin
604 dnl #
605 AC_DEFUN([SPL_LINUX_TRY_COMPILE_SYMBOL], [
606 SPL_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
607 if test $rc -ne 0; then :
608 $6
609 else
610 if test "x$enable_linux_builtin" != xyes; then
611 SPL_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
612 fi
613 if test $rc -ne 0; then :
614 $6
615 else :
616 $5
617 fi
618 fi
619 ])
620
621 dnl #
622 dnl # SPL_CHECK_SYMBOL_HEADER
623 dnl # check if a symbol prototype is defined in listed headers.
624 dnl #
625 AC_DEFUN([SPL_CHECK_SYMBOL_HEADER], [
626 AC_MSG_CHECKING([whether symbol $1 exists in header])
627 header=0
628 for file in $3; do
629 grep -q "$2" "$LINUX/$file" 2>/dev/null
630 rc=$?
631 if test $rc -eq 0; then
632 header=1
633 break;
634 fi
635 done
636 if test $header -eq 0; then
637 AC_MSG_RESULT([no])
638 $5
639 else
640 AC_MSG_RESULT([yes])
641 $4
642 fi
643 ])
644
645 dnl #
646 dnl # SPL_CHECK_HEADER
647 dnl # check whether header exists and define HAVE_$2_HEADER
648 dnl #
649 AC_DEFUN([SPL_CHECK_HEADER],
650 [AC_MSG_CHECKING([whether header $1 exists])
651 SPL_LINUX_TRY_COMPILE([
652 #include <$1>
653 ],[
654 return 0;
655 ],[
656 AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
657 AC_MSG_RESULT(yes)
658 $3
659 ],[
660 AC_MSG_RESULT(no)
661 $4
662 ])
663 ])
664
665 dnl #
666 dnl # Basic toolchain sanity check. Verify that kernel modules can
667 dnl # be built and which symbols can be used.
668 dnl #
669 AC_DEFUN([SPL_AC_TEST_MODULE],
670 [AC_MSG_CHECKING([whether modules can be built])
671 SPL_LINUX_TRY_COMPILE([],[],[
672 AC_MSG_RESULT([yes])
673 ],[
674 AC_MSG_RESULT([no])
675 if test "x$enable_linux_builtin" != xyes; then
676 AC_MSG_ERROR([*** Unable to build an empty module.])
677 else
678 AC_MSG_ERROR([
679 *** Unable to build an empty module.
680 *** Please run 'make scripts' inside the kernel source tree.])
681 fi
682 ])
683
684 AS_IF([test "x$cross_compiling" != xyes], [
685 AC_RUN_IFELSE([
686 AC_LANG_PROGRAM([
687 #include "$LINUX/include/linux/license.h"
688 ], [
689 return !license_is_gpl_compatible(
690 "$SPL_META_LICENSE");
691 ])
692 ], [
693 AC_DEFINE([SPL_IS_GPL_COMPATIBLE], [1],
694 [Define to 1 if GPL-only symbols can be used])
695 ], [
696 ])
697 ])
698 ])
699
700 dnl #
701 dnl # Use the atomic implemenation based on global spinlocks. This
702 dnl # should only be needed by 32-bit kernels which do not provide
703 dnl # the atomic64_* API. It may be optionally enabled as a fallback
704 dnl # if problems are observed with the direct mapping to the native
705 dnl # Linux atomic operations. You may not disable atomic spinlocks
706 dnl # if you kernel does not an atomic64_* API.
707 dnl #
708 AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
709 AC_ARG_ENABLE([atomic-spinlocks],
710 [AS_HELP_STRING([--enable-atomic-spinlocks],
711 [Atomic types use spinlocks @<:@default=check@:>@])],
712 [],
713 [enable_atomic_spinlocks=check])
714
715 SPL_LINUX_TRY_COMPILE([
716 #include <linux/fs.h>
717 ],[
718 atomic64_t *ptr __attribute__ ((unused));
719 ],[
720 have_atomic64_t=yes
721 AC_DEFINE(HAVE_ATOMIC64_T, 1,
722 [kernel defines atomic64_t])
723 ],[
724 have_atomic64_t=no
725 ])
726
727 AS_IF([test "x$enable_atomic_spinlocks" = xcheck], [
728 AS_IF([test "x$have_atomic64_t" = xyes], [
729 enable_atomic_spinlocks=no
730 ],[
731 enable_atomic_spinlocks=yes
732 ])
733 ])
734
735 AS_IF([test "x$enable_atomic_spinlocks" = xyes], [
736 AC_DEFINE([ATOMIC_SPINLOCK], [1],
737 [Atomic types use spinlocks])
738 ],[
739 AS_IF([test "x$have_atomic64_t" = xno], [
740 AC_MSG_FAILURE(
741 [--disable-atomic-spinlocks given but required atomic64 support is unavailable])
742 ])
743 ])
744
745 AC_MSG_CHECKING([whether atomic types use spinlocks])
746 AC_MSG_RESULT([$enable_atomic_spinlocks])
747
748 AC_MSG_CHECKING([whether kernel defines atomic64_t])
749 AC_MSG_RESULT([$have_atomic64_t])
750 ])
751
752 AC_DEFUN([SPL_AC_SHRINKER_CALLBACK],[
753 tmp_flags="$EXTRA_KCFLAGS"
754 EXTRA_KCFLAGS="-Werror"
755 dnl #
756 dnl # 2.6.23 to 2.6.34 API change
757 dnl # ->shrink(int nr_to_scan, gfp_t gfp_mask)
758 dnl #
759 AC_MSG_CHECKING([whether old 2-argument shrinker exists])
760 SPL_LINUX_TRY_COMPILE([
761 #include <linux/mm.h>
762
763 int shrinker_cb(int nr_to_scan, gfp_t gfp_mask);
764 ],[
765 struct shrinker cache_shrinker = {
766 .shrink = shrinker_cb,
767 .seeks = DEFAULT_SEEKS,
768 };
769 register_shrinker(&cache_shrinker);
770 ],[
771 AC_MSG_RESULT(yes)
772 AC_DEFINE(HAVE_2ARGS_OLD_SHRINKER_CALLBACK, 1,
773 [old shrinker callback wants 2 args])
774 ],[
775 AC_MSG_RESULT(no)
776 dnl #
777 dnl # 2.6.35 - 2.6.39 API change
778 dnl # ->shrink(struct shrinker *,
779 dnl # int nr_to_scan, gfp_t gfp_mask)
780 dnl #
781 AC_MSG_CHECKING([whether old 3-argument shrinker exists])
782 SPL_LINUX_TRY_COMPILE([
783 #include <linux/mm.h>
784
785 int shrinker_cb(struct shrinker *, int nr_to_scan,
786 gfp_t gfp_mask);
787 ],[
788 struct shrinker cache_shrinker = {
789 .shrink = shrinker_cb,
790 .seeks = DEFAULT_SEEKS,
791 };
792 register_shrinker(&cache_shrinker);
793 ],[
794 AC_MSG_RESULT(yes)
795 AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1,
796 [old shrinker callback wants 3 args])
797 ],[
798 AC_MSG_RESULT(no)
799 dnl #
800 dnl # 3.0 - 3.11 API change
801 dnl # ->shrink(struct shrinker *,
802 dnl # struct shrink_control *sc)
803 dnl #
804 AC_MSG_CHECKING(
805 [whether new 2-argument shrinker exists])
806 SPL_LINUX_TRY_COMPILE([
807 #include <linux/mm.h>
808
809 int shrinker_cb(struct shrinker *,
810 struct shrink_control *sc);
811 ],[
812 struct shrinker cache_shrinker = {
813 .shrink = shrinker_cb,
814 .seeks = DEFAULT_SEEKS,
815 };
816 register_shrinker(&cache_shrinker);
817 ],[
818 AC_MSG_RESULT(yes)
819 AC_DEFINE(HAVE_2ARGS_NEW_SHRINKER_CALLBACK, 1,
820 [new shrinker callback wants 2 args])
821 ],[
822 AC_MSG_RESULT(no)
823 dnl #
824 dnl # 3.12 API change,
825 dnl # ->shrink() is logically split in to
826 dnl # ->count_objects() and ->scan_objects()
827 dnl #
828 AC_MSG_CHECKING(
829 [whether ->count_objects callback exists])
830 SPL_LINUX_TRY_COMPILE([
831 #include <linux/mm.h>
832
833 unsigned long shrinker_cb(
834 struct shrinker *,
835 struct shrink_control *sc);
836 ],[
837 struct shrinker cache_shrinker = {
838 .count_objects = shrinker_cb,
839 .scan_objects = shrinker_cb,
840 .seeks = DEFAULT_SEEKS,
841 };
842 register_shrinker(&cache_shrinker);
843 ],[
844 AC_MSG_RESULT(yes)
845 AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK,
846 1, [->count_objects exists])
847 ],[
848 AC_MSG_ERROR(error)
849 ])
850 ])
851 ])
852 ])
853 EXTRA_KCFLAGS="$tmp_flags"
854 ])
855
856 dnl #
857 dnl # 2.6.33 API change,
858 dnl # Removed .ctl_name from struct ctl_table.
859 dnl #
860 AC_DEFUN([SPL_AC_CTL_NAME], [
861 AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
862 SPL_LINUX_TRY_COMPILE([
863 #include <linux/sysctl.h>
864 ],[
865 struct ctl_table ctl __attribute__ ((unused));
866 ctl.ctl_name = 0;
867 ],[
868 AC_MSG_RESULT(yes)
869 AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
870 ],[
871 AC_MSG_RESULT(no)
872 ])
873 ])
874
875 dnl #
876 dnl # 3.10 API change,
877 dnl # PDE is replaced by PDE_DATA
878 dnl #
879 AC_DEFUN([SPL_AC_PDE_DATA], [
880 AC_MSG_CHECKING([whether PDE_DATA() is available])
881 SPL_LINUX_TRY_COMPILE_SYMBOL([
882 #include <linux/proc_fs.h>
883 ], [
884 PDE_DATA(NULL);
885 ], [PDE_DATA], [], [
886 AC_MSG_RESULT(yes)
887 AC_DEFINE(HAVE_PDE_DATA, 1, [yes])
888 ],[
889 AC_MSG_RESULT(no)
890 ])
891 ])
892
893 dnl #
894 dnl # 3.9 API change
895 dnl # set_fs_pwd takes const struct path *
896 dnl #
897 AC_DEFUN([SPL_AC_SET_FS_PWD_WITH_CONST],
898 tmp_flags="$EXTRA_KCFLAGS"
899 EXTRA_KCFLAGS="-Werror"
900 [AC_MSG_CHECKING([whether set_fs_pwd() requires const struct path *])
901 SPL_LINUX_TRY_COMPILE([
902 #include <linux/spinlock.h>
903 #include <linux/fs_struct.h>
904 #include <linux/path.h>
905 void (*const set_fs_pwd_func)
906 (struct fs_struct *, const struct path *)
907 = set_fs_pwd;
908 ],[
909 return 0;
910 ],[
911 AC_MSG_RESULT(yes)
912 AC_DEFINE(HAVE_SET_FS_PWD_WITH_CONST, 1,
913 [set_fs_pwd() needs const path *])
914 ],[
915 SPL_LINUX_TRY_COMPILE([
916 #include <linux/spinlock.h>
917 #include <linux/fs_struct.h>
918 #include <linux/path.h>
919 void (*const set_fs_pwd_func)
920 (struct fs_struct *, struct path *)
921 = set_fs_pwd;
922 ],[
923 return 0;
924 ],[
925 AC_MSG_RESULT(no)
926 ],[
927 AC_MSG_ERROR(unknown)
928 ])
929 ])
930 EXTRA_KCFLAGS="$tmp_flags"
931 ])
932
933 dnl #
934 dnl # 3.13 API change
935 dnl # vfs_unlink() updated to take a third delegated_inode argument.
936 dnl #
937 AC_DEFUN([SPL_AC_2ARGS_VFS_UNLINK],
938 [AC_MSG_CHECKING([whether vfs_unlink() wants 2 args])
939 SPL_LINUX_TRY_COMPILE([
940 #include <linux/fs.h>
941 ],[
942 vfs_unlink((struct inode *) NULL, (struct dentry *) NULL);
943 ],[
944 AC_MSG_RESULT(yes)
945 AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
946 [vfs_unlink() wants 2 args])
947 ],[
948 AC_MSG_RESULT(no)
949 dnl #
950 dnl # Linux 3.13 API change
951 dnl # Added delegated inode
952 dnl #
953 AC_MSG_CHECKING([whether vfs_unlink() wants 3 args])
954 SPL_LINUX_TRY_COMPILE([
955 #include <linux/fs.h>
956 ],[
957 vfs_unlink((struct inode *) NULL,
958 (struct dentry *) NULL,
959 (struct inode **) NULL);
960 ],[
961 AC_MSG_RESULT(yes)
962 AC_DEFINE(HAVE_3ARGS_VFS_UNLINK, 1,
963 [vfs_unlink() wants 3 args])
964 ],[
965 AC_MSG_ERROR(no)
966 ])
967
968 ])
969 ])
970
971 dnl #
972 dnl # 3.13 and 3.15 API changes
973 dnl # Added delegated inode and flags argument.
974 dnl #
975 AC_DEFUN([SPL_AC_4ARGS_VFS_RENAME],
976 [AC_MSG_CHECKING([whether vfs_rename() wants 4 args])
977 SPL_LINUX_TRY_COMPILE([
978 #include <linux/fs.h>
979 ],[
980 vfs_rename((struct inode *) NULL, (struct dentry *) NULL,
981 (struct inode *) NULL, (struct dentry *) NULL);
982 ],[
983 AC_MSG_RESULT(yes)
984 AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
985 [vfs_rename() wants 4 args])
986 ],[
987 AC_MSG_RESULT(no)
988 dnl #
989 dnl # Linux 3.13 API change
990 dnl # Added delegated inode
991 dnl #
992 AC_MSG_CHECKING([whether vfs_rename() wants 5 args])
993 SPL_LINUX_TRY_COMPILE([
994 #include <linux/fs.h>
995 ],[
996 vfs_rename((struct inode *) NULL,
997 (struct dentry *) NULL,
998 (struct inode *) NULL,
999 (struct dentry *) NULL,
1000 (struct inode **) NULL);
1001 ],[
1002 AC_MSG_RESULT(yes)
1003 AC_DEFINE(HAVE_5ARGS_VFS_RENAME, 1,
1004 [vfs_rename() wants 5 args])
1005 ],[
1006 AC_MSG_RESULT(no)
1007 dnl #
1008 dnl # Linux 3.15 API change
1009 dnl # Added flags
1010 dnl #
1011 AC_MSG_CHECKING([whether vfs_rename() wants 6 args])
1012 SPL_LINUX_TRY_COMPILE([
1013 #include <linux/fs.h>
1014 ],[
1015 vfs_rename((struct inode *) NULL,
1016 (struct dentry *) NULL,
1017 (struct inode *) NULL,
1018 (struct dentry *) NULL,
1019 (struct inode **) NULL,
1020 (unsigned int) 0);
1021 ],[
1022 AC_MSG_RESULT(yes)
1023 AC_DEFINE(HAVE_6ARGS_VFS_RENAME, 1,
1024 [vfs_rename() wants 6 args])
1025 ],[
1026 AC_MSG_ERROR(no)
1027 ])
1028 ])
1029 ])
1030 ])
1031
1032 dnl #
1033 dnl # 2.6.36 API change,
1034 dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
1035 dnl # a spinlock_t to improve the fastpath performance.
1036 dnl #
1037 AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
1038 AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
1039 tmp_flags="$EXTRA_KCFLAGS"
1040 EXTRA_KCFLAGS="-Werror"
1041 SPL_LINUX_TRY_COMPILE([
1042 #include <linux/sched.h>
1043 #include <linux/fs_struct.h>
1044 ],[
1045 static struct fs_struct fs;
1046 spin_lock_init(&fs.lock);
1047 ],[
1048 AC_MSG_RESULT(yes)
1049 AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
1050 [struct fs_struct uses spinlock_t])
1051 ],[
1052 AC_MSG_RESULT(no)
1053 ])
1054 EXTRA_KCFLAGS="$tmp_flags"
1055 ])
1056
1057 dnl #
1058 dnl # User namespaces, use kuid_t in place of uid_t
1059 dnl # where available. Not strictly a user namespaces thing
1060 dnl # but it should prevent surprises
1061 dnl #
1062 AC_DEFUN([SPL_AC_KUIDGID_T], [
1063 AC_MSG_CHECKING([whether kuid_t/kgid_t is available])
1064 SPL_LINUX_TRY_COMPILE([
1065 #include <linux/uidgid.h>
1066 ], [
1067 kuid_t userid = KUIDT_INIT(0);
1068 kgid_t groupid = KGIDT_INIT(0);
1069 ],[
1070 SPL_LINUX_TRY_COMPILE([
1071 #include <linux/uidgid.h>
1072 ], [
1073 kuid_t userid = 0;
1074 kgid_t groupid = 0;
1075 ],[
1076 AC_MSG_RESULT(yes; optional)
1077 ],[
1078 AC_MSG_RESULT(yes; mandatory)
1079 AC_DEFINE(HAVE_KUIDGID_T, 1, [kuid_t/kgid_t in use])
1080 ])
1081 ],[
1082 AC_MSG_RESULT(no)
1083 ])
1084 ])
1085
1086 dnl #
1087 dnl # 2.6.35 API change,
1088 dnl # Unused 'struct dentry *' removed from vfs_fsync() prototype.
1089 dnl #
1090 AC_DEFUN([SPL_AC_2ARGS_VFS_FSYNC], [
1091 AC_MSG_CHECKING([whether vfs_fsync() wants 2 args])
1092 SPL_LINUX_TRY_COMPILE([
1093 #include <linux/fs.h>
1094 ],[
1095 vfs_fsync(NULL, 0);
1096 ],[
1097 AC_MSG_RESULT(yes)
1098 AC_DEFINE(HAVE_2ARGS_VFS_FSYNC, 1, [vfs_fsync() wants 2 args])
1099 ],[
1100 AC_MSG_RESULT(no)
1101 ])
1102 ])
1103
1104 dnl #
1105 dnl # 3.5 API change,
1106 dnl # inode_operations.truncate_range removed
1107 dnl #
1108 AC_DEFUN([SPL_AC_INODE_TRUNCATE_RANGE], [
1109 AC_MSG_CHECKING([whether truncate_range() inode operation is available])
1110 SPL_LINUX_TRY_COMPILE([
1111 #include <linux/fs.h>
1112 ],[
1113 struct inode_operations ops;
1114 ops.truncate_range = NULL;
1115 ],[
1116 AC_MSG_RESULT(yes)
1117 AC_DEFINE(HAVE_INODE_TRUNCATE_RANGE, 1,
1118 [truncate_range() inode operation is available])
1119 ],[
1120 AC_MSG_RESULT(no)
1121 ])
1122 ])
1123
1124 dnl #
1125 dnl # Linux 2.6.38 - 3.x API
1126 dnl #
1127 AC_DEFUN([SPL_AC_KERNEL_FILE_FALLOCATE], [
1128 AC_MSG_CHECKING([whether fops->fallocate() exists])
1129 SPL_LINUX_TRY_COMPILE([
1130 #include <linux/fs.h>
1131 ],[
1132 long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
1133 struct file_operations fops __attribute__ ((unused)) = {
1134 .fallocate = fallocate,
1135 };
1136 ],[
1137 AC_MSG_RESULT(yes)
1138 AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
1139 ],[
1140 AC_MSG_RESULT(no)
1141 ])
1142 ])
1143
1144 dnl #
1145 dnl # Linux 2.6.x - 2.6.37 API
1146 dnl #
1147 AC_DEFUN([SPL_AC_KERNEL_INODE_FALLOCATE], [
1148 AC_MSG_CHECKING([whether iops->fallocate() exists])
1149 SPL_LINUX_TRY_COMPILE([
1150 #include <linux/fs.h>
1151 ],[
1152 long (*fallocate) (struct inode *, int, loff_t, loff_t) = NULL;
1153 struct inode_operations fops __attribute__ ((unused)) = {
1154 .fallocate = fallocate,
1155 };
1156 ],[
1157 AC_MSG_RESULT(yes)
1158 AC_DEFINE(HAVE_INODE_FALLOCATE, 1, [fops->fallocate() exists])
1159 ],[
1160 AC_MSG_RESULT(no)
1161 ])
1162 ])
1163
1164 dnl #
1165 dnl # PaX Linux 2.6.38 - 3.x API
1166 dnl #
1167 AC_DEFUN([SPL_AC_PAX_KERNEL_FILE_FALLOCATE], [
1168 AC_MSG_CHECKING([whether fops->fallocate() exists])
1169 SPL_LINUX_TRY_COMPILE([
1170 #include <linux/fs.h>
1171 ],[
1172 long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
1173 struct file_operations_no_const fops __attribute__ ((unused)) = {
1174 .fallocate = fallocate,
1175 };
1176 ],[
1177 AC_MSG_RESULT(yes)
1178 AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
1179 ],[
1180 AC_MSG_RESULT(no)
1181 ])
1182 ])
1183
1184 dnl #
1185 dnl # The fallocate callback was moved from the inode_operations
1186 dnl # structure to the file_operations structure.
1187 dnl #
1188 AC_DEFUN([SPL_AC_KERNEL_FALLOCATE], [
1189 SPL_AC_KERNEL_FILE_FALLOCATE
1190 SPL_AC_KERNEL_INODE_FALLOCATE
1191 SPL_AC_PAX_KERNEL_FILE_FALLOCATE
1192 ])
1193
1194 dnl #
1195 dnl # zlib inflate compat,
1196 dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
1197 dnl #
1198 AC_DEFUN([SPL_AC_CONFIG_ZLIB_INFLATE], [
1199 AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
1200 SPL_LINUX_TRY_COMPILE([
1201 #if !defined(CONFIG_ZLIB_INFLATE) && \
1202 !defined(CONFIG_ZLIB_INFLATE_MODULE)
1203 #error CONFIG_ZLIB_INFLATE not defined
1204 #endif
1205 ],[ ],[
1206 AC_MSG_RESULT([yes])
1207 ],[
1208 AC_MSG_RESULT([no])
1209 AC_MSG_ERROR([
1210 *** This kernel does not include the required zlib inflate support.
1211 *** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
1212 ])
1213 ])
1214
1215 dnl #
1216 dnl # zlib deflate compat,
1217 dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
1218 dnl #
1219 AC_DEFUN([SPL_AC_CONFIG_ZLIB_DEFLATE], [
1220 AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
1221 SPL_LINUX_TRY_COMPILE([
1222 #if !defined(CONFIG_ZLIB_DEFLATE) && \
1223 !defined(CONFIG_ZLIB_DEFLATE_MODULE)
1224 #error CONFIG_ZLIB_DEFLATE not defined
1225 #endif
1226 ],[ ],[
1227 AC_MSG_RESULT([yes])
1228 ],[
1229 AC_MSG_RESULT([no])
1230 AC_MSG_ERROR([
1231 *** This kernel does not include the required zlib deflate support.
1232 *** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
1233 ])
1234 ])
1235
1236 dnl #
1237 dnl # config trim unused symbols,
1238 dnl # Verify the kernel has CONFIG_TRIM_UNUSED_KSYMS DISABLED.
1239 dnl #
1240 AC_DEFUN([SPL_AC_CONFIG_TRIM_UNUSED_KSYMS], [
1241 AC_MSG_CHECKING([whether CONFIG_TRIM_UNUSED_KSYM is disabled])
1242 SPL_LINUX_TRY_COMPILE([
1243 #if defined(CONFIG_TRIM_UNUSED_KSYMS)
1244 #error CONFIG_TRIM_UNUSED_KSYMS not defined
1245 #endif
1246 ],[ ],[
1247 AC_MSG_RESULT([yes])
1248 ],[
1249 AC_MSG_RESULT([no])
1250 AC_MSG_ERROR([
1251 *** This kernel has unused symbols trimming enabled, please disable.
1252 *** Rebuild the kernel with CONFIG_TRIM_UNUSED_KSYMS=n set.])
1253 ])
1254 ])
1255
1256 dnl #
1257 dnl # 2.6.39 API compat,
1258 dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
1259 dnl # This was done to avoid always having to allocate the maximum size
1260 dnl # workspace (268K). The caller can now specific the windowBits and
1261 dnl # memLevel compression parameters to get a smaller workspace.
1262 dnl #
1263 AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
1264 [AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
1265 SPL_LINUX_TRY_COMPILE([
1266 #include <linux/zlib.h>
1267 ],[
1268 return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
1269 ],[
1270 AC_MSG_RESULT(yes)
1271 AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
1272 [zlib_deflate_workspacesize() wants 2 args])
1273 ],[
1274 AC_MSG_RESULT(no)
1275 ])
1276 ])
1277
1278 dnl #
1279 dnl # 2.6.39 API change,
1280 dnl # Shrinker adjust to use common shrink_control structure.
1281 dnl #
1282 AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
1283 AC_MSG_CHECKING([whether struct shrink_control exists])
1284 SPL_LINUX_TRY_COMPILE([
1285 #include <linux/mm.h>
1286 ],[
1287 struct shrink_control sc __attribute__ ((unused));
1288
1289 sc.nr_to_scan = 0;
1290 sc.gfp_mask = GFP_KERNEL;
1291 ],[
1292 AC_MSG_RESULT(yes)
1293 AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
1294 [struct shrink_control exists])
1295 ],[
1296 AC_MSG_RESULT(no)
1297 ])
1298 ])
1299
1300 dnl #
1301 dnl # 3.1 API Change
1302 dnl #
1303 dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
1304 dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
1305 dnl #
1306 AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
1307 AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
1308 tmp_flags="$EXTRA_KCFLAGS"
1309 EXTRA_KCFLAGS="-Werror"
1310 SPL_LINUX_TRY_COMPILE([
1311 #include <linux/rwsem.h>
1312 ],[
1313 struct rw_semaphore dummy_semaphore __attribute__ ((unused));
1314 raw_spinlock_t dummy_lock __attribute__ ((unused));
1315 dummy_semaphore.wait_lock = dummy_lock;
1316 ],[
1317 AC_MSG_RESULT(yes)
1318 AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
1319 [struct rw_semaphore member wait_lock is raw_spinlock_t])
1320 ],[
1321 AC_MSG_RESULT(no)
1322 ])
1323 EXTRA_KCFLAGS="$tmp_flags"
1324 ])
1325
1326 dnl #
1327 dnl # 3.16 API Change
1328 dnl #
1329 dnl # rwsem-spinlock "->activity" changed to "->count"
1330 dnl #
1331 AC_DEFUN([SPL_AC_RWSEM_ACTIVITY], [
1332 AC_MSG_CHECKING([whether struct rw_semaphore has member activity])
1333 tmp_flags="$EXTRA_KCFLAGS"
1334 EXTRA_KCFLAGS="-Werror"
1335 SPL_LINUX_TRY_COMPILE([
1336 #include <linux/rwsem.h>
1337 ],[
1338 struct rw_semaphore dummy_semaphore __attribute__ ((unused));
1339 dummy_semaphore.activity = 0;
1340 ],[
1341 AC_MSG_RESULT(yes)
1342 AC_DEFINE(HAVE_RWSEM_ACTIVITY, 1,
1343 [struct rw_semaphore has member activity])
1344 ],[
1345 AC_MSG_RESULT(no)
1346 ])
1347 EXTRA_KCFLAGS="$tmp_flags"
1348 ])
1349
1350 dnl #
1351 dnl # 4.8 API Change
1352 dnl #
1353 dnl # rwsem "->count" changed to atomic_long_t type
1354 dnl #
1355 AC_DEFUN([SPL_AC_RWSEM_ATOMIC_LONG_COUNT], [
1356 AC_MSG_CHECKING(
1357 [whether struct rw_semaphore has atomic_long_t member count])
1358 tmp_flags="$EXTRA_KCFLAGS"
1359 EXTRA_KCFLAGS="-Werror"
1360 SPL_LINUX_TRY_COMPILE([
1361 #include <linux/rwsem.h>
1362 ],[
1363 DECLARE_RWSEM(dummy_semaphore);
1364 (void) atomic_long_read(&dummy_semaphore.count);
1365 ],[
1366 AC_MSG_RESULT(yes)
1367 AC_DEFINE(HAVE_RWSEM_ATOMIC_LONG_COUNT, 1,
1368 [struct rw_semaphore has atomic_long_t member count])
1369 ],[
1370 AC_MSG_RESULT(no)
1371 ])
1372 EXTRA_KCFLAGS="$tmp_flags"
1373 ])
1374
1375 dnl #
1376 dnl # 3.9 API change,
1377 dnl # Moved things from linux/sched.h to linux/sched/rt.h
1378 dnl #
1379 AC_DEFUN([SPL_AC_SCHED_RT_HEADER],
1380 [AC_MSG_CHECKING([whether header linux/sched/rt.h exists])
1381 SPL_LINUX_TRY_COMPILE([
1382 #include <linux/sched.h>
1383 #include <linux/sched/rt.h>
1384 ],[
1385 return 0;
1386 ],[
1387 AC_DEFINE(HAVE_SCHED_RT_HEADER, 1, [linux/sched/rt.h exists])
1388 AC_MSG_RESULT(yes)
1389 ],[
1390 AC_MSG_RESULT(no)
1391 ])
1392 ])
1393
1394 dnl #
1395 dnl # 4.11 API change,
1396 dnl # Moved things from linux/sched.h to linux/sched/signal.h
1397 dnl #
1398 AC_DEFUN([SPL_AC_SCHED_SIGNAL_HEADER],
1399 [AC_MSG_CHECKING([whether header linux/sched/signal.h exists])
1400 SPL_LINUX_TRY_COMPILE([
1401 #include <linux/sched.h>
1402 #include <linux/sched/signal.h>
1403 ],[
1404 return 0;
1405 ],[
1406 AC_DEFINE(HAVE_SCHED_SIGNAL_HEADER, 1, [linux/sched/signal.h exists])
1407 AC_MSG_RESULT(yes)
1408 ],[
1409 AC_MSG_RESULT(no)
1410 ])
1411 ])
1412
1413 dnl #
1414 dnl # 4.11 API, a528d35e@torvalds/linux
1415 dnl # vfs_getattr(const struct path *p, struct kstat *s, u32 m, unsigned int f)
1416 dnl #
1417 AC_DEFUN([SPL_AC_4ARGS_VFS_GETATTR], [
1418 AC_MSG_CHECKING([whether vfs_getattr() wants 4 args])
1419 SPL_LINUX_TRY_COMPILE([
1420 #include <linux/fs.h>
1421 ],[
1422 vfs_getattr((const struct path *)NULL,
1423 (struct kstat *)NULL,
1424 (u32)0,
1425 (unsigned int)0);
1426 ],[
1427 AC_MSG_RESULT(yes)
1428 AC_DEFINE(HAVE_4ARGS_VFS_GETATTR, 1,
1429 [vfs_getattr wants 4 args])
1430 ],[
1431 AC_MSG_RESULT(no)
1432 ])
1433 ])
1434
1435 dnl #
1436 dnl # 3.9 API
1437 dnl # vfs_getattr(struct path *p, struct kstat *s)
1438 dnl #
1439 AC_DEFUN([SPL_AC_2ARGS_VFS_GETATTR], [
1440 AC_MSG_CHECKING([whether vfs_getattr() wants 2 args])
1441 SPL_LINUX_TRY_COMPILE([
1442 #include <linux/fs.h>
1443 ],[
1444 vfs_getattr((struct path *) NULL,
1445 (struct kstat *)NULL);
1446 ],[
1447 AC_MSG_RESULT(yes)
1448 AC_DEFINE(HAVE_2ARGS_VFS_GETATTR, 1,
1449 [vfs_getattr wants 2 args])
1450 ],[
1451 AC_MSG_RESULT(no)
1452 ])
1453 ])
1454
1455 dnl #
1456 dnl # <3.9 API
1457 dnl # vfs_getattr(struct vfsmount *v, struct dentry *d, struct kstat *k)
1458 dnl #
1459 AC_DEFUN([SPL_AC_3ARGS_VFS_GETATTR], [
1460 AC_MSG_CHECKING([whether vfs_getattr() wants 3 args])
1461 SPL_LINUX_TRY_COMPILE([
1462 #include <linux/fs.h>
1463 ],[
1464 vfs_getattr((struct vfsmount *)NULL,
1465 (struct dentry *)NULL,
1466 (struct kstat *)NULL);
1467 ],[
1468 AC_MSG_RESULT(yes)
1469 AC_DEFINE(HAVE_3ARGS_VFS_GETATTR, 1,
1470 [vfs_getattr wants 3 args])
1471 ],[
1472 AC_MSG_RESULT(no)
1473 ])
1474 ])
1475
1476 dnl #
1477 dnl # 2.6.36 API compatibility.
1478 dnl # Added usleep_range timer.
1479 dnl # usleep_range is a finer precision implementation of msleep
1480 dnl # designed to be a drop-in replacement for udelay where a precise
1481 dnl # sleep / busy-wait is unnecessary.
1482 dnl #
1483 AC_DEFUN([SPL_AC_USLEEP_RANGE], [
1484 AC_MSG_CHECKING([whether usleep_range() is available])
1485 SPL_LINUX_TRY_COMPILE([
1486 #include <linux/delay.h>
1487 ],[
1488 usleep_range(0, 0);
1489 ],[
1490 AC_MSG_RESULT(yes)
1491 AC_DEFINE(HAVE_USLEEP_RANGE, 1,
1492 [usleep_range is available])
1493 ],[
1494 AC_MSG_RESULT(no)
1495 ])
1496 ])
1497
1498 dnl #
1499 dnl # 2.6.35 API change,
1500 dnl # The cachep->gfpflags member was renamed cachep->allocflags. These are
1501 dnl # private allocation flags which are applied when allocating a new slab
1502 dnl # in kmem_getpages(). Unfortunately there is no public API for setting
1503 dnl # non-default flags.
1504 dnl #
1505 AC_DEFUN([SPL_AC_KMEM_CACHE_ALLOCFLAGS], [
1506 AC_MSG_CHECKING([whether struct kmem_cache has allocflags])
1507 SPL_LINUX_TRY_COMPILE([
1508 #include <linux/slab.h>
1509 ],[
1510 struct kmem_cache cachep __attribute__ ((unused));
1511 cachep.allocflags = GFP_KERNEL;
1512 ],[
1513 AC_MSG_RESULT(yes)
1514 AC_DEFINE(HAVE_KMEM_CACHE_ALLOCFLAGS, 1,
1515 [struct kmem_cache has allocflags])
1516 ],[
1517 AC_MSG_RESULT(no)
1518
1519 AC_MSG_CHECKING([whether struct kmem_cache has gfpflags])
1520 SPL_LINUX_TRY_COMPILE([
1521 #include <linux/slab.h>
1522 ],[
1523 struct kmem_cache cachep __attribute__ ((unused));
1524 cachep.gfpflags = GFP_KERNEL;
1525 ],[
1526 AC_MSG_RESULT(yes)
1527 AC_DEFINE(HAVE_KMEM_CACHE_GFPFLAGS, 1,
1528 [struct kmem_cache has gfpflags])
1529 ],[
1530 AC_MSG_RESULT(no)
1531 ])
1532 ])
1533 ])
1534
1535 dnl #
1536 dnl # 3.17 API change,
1537 dnl # wait_on_bit() no longer requires an action argument. The former
1538 dnl # "wait_on_bit" interface required an 'action' function to be provided
1539 dnl # which does the actual waiting. There were over 20 such functions in the
1540 dnl # kernel, many of them identical, though most cases can be satisfied by one
1541 dnl # of just two functions: one which uses io_schedule() and one which just
1542 dnl # uses schedule(). This API change was made to consolidate all of those
1543 dnl # redundant wait functions.
1544 dnl #
1545 AC_DEFUN([SPL_AC_WAIT_ON_BIT], [
1546 AC_MSG_CHECKING([whether wait_on_bit() takes an action])
1547 SPL_LINUX_TRY_COMPILE([
1548 #include <linux/wait.h>
1549 ],[
1550 int (*action)(void *) = NULL;
1551 wait_on_bit(NULL, 0, action, 0);
1552 ],[
1553 AC_MSG_RESULT(yes)
1554 AC_DEFINE(HAVE_WAIT_ON_BIT_ACTION, 1, [yes])
1555 ],[
1556 AC_MSG_RESULT(no)
1557 ])
1558 ])
1559
1560 dnl #
1561 dnl # 4.7 API change
1562 dnl # i_mutex is changed to i_rwsem. Instead of directly using
1563 dnl # i_mutex/i_rwsem, we should use inode_lock() and inode_lock_shared()
1564 dnl # We test inode_lock_shared because inode_lock is introduced earlier.
1565 dnl #
1566 AC_DEFUN([SPL_AC_INODE_LOCK], [
1567 AC_MSG_CHECKING([whether inode_lock_shared() exists])
1568 tmp_flags="$EXTRA_KCFLAGS"
1569 EXTRA_KCFLAGS="-Werror"
1570 SPL_LINUX_TRY_COMPILE([
1571 #include <linux/fs.h>
1572 ],[
1573 struct inode *inode = NULL;
1574 inode_lock_shared(inode);
1575 ],[
1576 AC_MSG_RESULT(yes)
1577 AC_DEFINE(HAVE_INODE_LOCK_SHARED, 1, [yes])
1578 ],[
1579 AC_MSG_RESULT(no)
1580 ])
1581 EXTRA_KCFLAGS="$tmp_flags"
1582 ])
1583
1584 dnl #
1585 dnl # Check whether mutex has owner with task_struct type.
1586 dnl #
1587 dnl # Note that before Linux 3.0, mutex owner is of type thread_info.
1588 dnl #
1589 dnl # Note that in Linux 3.18, the condition for owner is changed from
1590 dnl # defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_SMP) to
1591 dnl # defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_MUTEX_SPIN_ON_OWNER)
1592 dnl #
1593 AC_DEFUN([SPL_AC_MUTEX_OWNER], [
1594 AC_MSG_CHECKING([whether mutex has owner])
1595 tmp_flags="$EXTRA_KCFLAGS"
1596 EXTRA_KCFLAGS="-Werror"
1597 SPL_LINUX_TRY_COMPILE([
1598 #include <linux/mutex.h>
1599 #include <linux/spinlock.h>
1600 ],[
1601 DEFINE_MUTEX(m);
1602 struct task_struct *t __attribute__ ((unused));
1603 t = m.owner;
1604 ],[
1605 AC_MSG_RESULT(yes)
1606 AC_DEFINE(HAVE_MUTEX_OWNER, 1, [yes])
1607 ],[
1608 AC_MSG_RESULT(no)
1609 ])
1610 EXTRA_KCFLAGS="$tmp_flags"
1611 ])
1612
1613 dnl #
1614 dnl # 4.9 API change
1615 dnl # group_info changed from 2d array via >blocks to 1d array via ->gid
1616 dnl #
1617 AC_DEFUN([SPL_AC_GROUP_INFO_GID], [
1618 AC_MSG_CHECKING([whether group_info->gid exists])
1619 tmp_flags="$EXTRA_KCFLAGS"
1620 EXTRA_KCFLAGS="-Werror"
1621 SPL_LINUX_TRY_COMPILE([
1622 #include <linux/cred.h>
1623 ],[
1624 struct group_info *gi = groups_alloc(1);
1625 gi->gid[0] = KGIDT_INIT(0);
1626 ],[
1627 AC_MSG_RESULT(yes)
1628 AC_DEFINE(HAVE_GROUP_INFO_GID, 1, [group_info->gid exists])
1629 ],[
1630 AC_MSG_RESULT(no)
1631 ])
1632 EXTRA_KCFLAGS="$tmp_flags"
1633 ])
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