2 dnl # Default ZFS kernel configuration
4 AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
9 ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
10 ZFS_AC_KERNEL_TYPE_FMODE_T
11 ZFS_AC_KERNEL_KOBJ_NAME_LEN
12 ZFS_AC_KERNEL_3ARG_BLKDEV_GET
13 ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
14 ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
15 ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
16 ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
17 ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE
18 ZFS_AC_KERNEL_BIO_EMPTY_BARRIER
19 ZFS_AC_KERNEL_BIO_FAILFAST
20 ZFS_AC_KERNEL_BIO_FAILFAST_DTD
21 ZFS_AC_KERNEL_REQ_FAILFAST_MASK
22 ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
23 ZFS_AC_KERNEL_BIO_RW_SYNC
24 ZFS_AC_KERNEL_BIO_RW_SYNCIO
25 ZFS_AC_KERNEL_REQ_SYNC
26 ZFS_AC_KERNEL_BLK_END_REQUEST
27 ZFS_AC_KERNEL_BLK_QUEUE_FLUSH
28 ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS
29 ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS
30 ZFS_AC_KERNEL_BLK_QUEUE_PHYSICAL_BLOCK_SIZE
31 ZFS_AC_KERNEL_BLK_QUEUE_IO_OPT
32 ZFS_AC_KERNEL_BLK_QUEUE_NONROT
33 ZFS_AC_KERNEL_BLK_QUEUE_DISCARD
34 ZFS_AC_KERNEL_BLK_FETCH_REQUEST
35 ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
36 ZFS_AC_KERNEL_BLK_RQ_BYTES
37 ZFS_AC_KERNEL_BLK_RQ_POS
38 ZFS_AC_KERNEL_BLK_RQ_SECTORS
39 ZFS_AC_KERNEL_GET_DISK_RO
40 ZFS_AC_KERNEL_GET_GENDISK
41 ZFS_AC_KERNEL_RQ_IS_SYNC
42 ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT
43 ZFS_AC_KERNEL_DISCARD_GRANULARITY
44 ZFS_AC_KERNEL_CONST_XATTR_HANDLER
45 ZFS_AC_KERNEL_XATTR_HANDLER_GET
46 ZFS_AC_KERNEL_XATTR_HANDLER_SET
47 ZFS_AC_KERNEL_SHOW_OPTIONS
49 ZFS_AC_KERNEL_EVICT_INODE
50 ZFS_AC_KERNEL_NR_CACHED_OBJECTS
51 ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
52 ZFS_AC_KERNEL_FALLOCATE
53 ZFS_AC_KERNEL_MKDIR_UMODE_T
54 ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
55 ZFS_AC_KERNEL_CREATE_NAMEIDATA
56 ZFS_AC_KERNEL_TRUNCATE_RANGE
57 ZFS_AC_KERNEL_AUTOMOUNT
58 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
59 ZFS_AC_KERNEL_COMMIT_METADATA
60 ZFS_AC_KERNEL_CLEAR_INODE
61 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
62 ZFS_AC_KERNEL_D_MAKE_ROOT
63 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
64 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
65 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
66 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
67 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
68 ZFS_AC_KERNEL_MOUNT_NODEV
71 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
72 ZFS_AC_KERNEL_SET_NLINK
73 ZFS_AC_KERNEL_ELEVATOR_CHANGE
74 ZFS_AC_KERNEL_5ARG_SGET
76 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
77 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
79 AC_SUBST(KERNELMAKE_PARAMS)
82 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
83 dnl # compiler options are added by the kernel build system.
84 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
85 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
86 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
88 AC_SUBST(KERNELCPPFLAGS)
92 dnl # Detect name used for Module.symvers file in kernel
94 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
95 modpost=$LINUX/scripts/Makefile.modpost
96 AC_MSG_CHECKING([kernel file name for module symbols])
97 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
98 AS_IF([grep -q Modules.symvers $modpost], [
99 LINUX_SYMBOLS=Modules.symvers
101 LINUX_SYMBOLS=Module.symvers
104 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
106 *** Please make sure the kernel devel package for your distribution
107 *** is installed. If your building with a custom kernel make sure the
108 *** kernel is configured, built, and the '--with-linux=PATH' configure
109 *** option refers to the location of the kernel source.])
114 AC_MSG_RESULT($LINUX_SYMBOLS)
115 AC_SUBST(LINUX_SYMBOLS)
119 dnl # Detect the kernel to be built against
121 AC_DEFUN([ZFS_AC_KERNEL], [
123 AS_HELP_STRING([--with-linux=PATH],
124 [Path to kernel source]),
125 [kernelsrc="$withval"])
127 AC_ARG_WITH(linux-obj,
128 AS_HELP_STRING([--with-linux-obj=PATH],
129 [Path to kernel build objects]),
130 [kernelbuild="$withval"])
132 AC_MSG_CHECKING([kernel source directory])
133 AS_IF([test -z "$kernelsrc"], [
134 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
135 headersdir="/lib/modules/$(uname -r)/source"
136 sourcelink=$(readlink -f "$headersdir")
137 ], [test -e "/lib/modules/$(uname -r)/build"], [
138 headersdir="/lib/modules/$(uname -r)/build"
139 sourcelink=$(readlink -f "$headersdir")
141 sourcelink=$(ls -1d /usr/src/kernels/* \
143 2>/dev/null | grep -v obj | tail -1)
146 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
147 kernelsrc=`readlink -f ${sourcelink}`
149 kernelsrc="[Not found]"
152 AS_IF([test "$kernelsrc" = "NONE"], [
157 AC_MSG_RESULT([$kernelsrc])
158 AS_IF([test ! -d "$kernelsrc"], [
160 *** Please make sure the kernel devel package for your distribution
161 *** is installed then try again. If that fails you can specify the
162 *** location of the kernel source with the '--with-linux=PATH' option.])
165 AC_MSG_CHECKING([kernel build directory])
166 AS_IF([test -z "$kernelbuild"], [
167 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
168 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
169 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
170 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
171 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
172 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
173 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
174 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
176 kernelbuild=${kernelsrc}
179 AC_MSG_RESULT([$kernelbuild])
181 AC_MSG_CHECKING([kernel source version])
182 utsrelease1=$kernelbuild/include/linux/version.h
183 utsrelease2=$kernelbuild/include/linux/utsrelease.h
184 utsrelease3=$kernelbuild/include/generated/utsrelease.h
185 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
186 utsrelease=linux/version.h
187 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
188 utsrelease=linux/utsrelease.h
189 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
190 utsrelease=generated/utsrelease.h
193 AS_IF([test "$utsrelease"], [
194 kernsrcver=`(echo "#include <$utsrelease>";
195 echo "kernsrcver=UTS_RELEASE") |
196 cpp -I $kernelbuild/include |
197 grep "^kernsrcver=" | cut -d \" -f 2`
199 AS_IF([test -z "$kernsrcver"], [
200 AC_MSG_RESULT([Not found])
201 AC_MSG_ERROR([*** Cannot determine kernel version.])
204 AC_MSG_RESULT([Not found])
205 if test "x$enable_linux_builtin" != xyes; then
206 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
209 *** Cannot find UTS_RELEASE definition.
210 *** Please run 'make prepare' inside the kernel source tree.])
214 AC_MSG_RESULT([$kernsrcver])
217 LINUX_OBJ=${kernelbuild}
218 LINUX_VERSION=${kernsrcver}
222 AC_SUBST(LINUX_VERSION)
224 ZFS_AC_MODULE_SYMVERS
228 dnl # Detect name used for the additional SPL Module.symvers file. If one
229 dnl # does not exist this is likely because the SPL has been configured
230 dnl # but not built. The '--with-spl-timeout' option can be passed
231 dnl # to pause here, waiting for the file to appear from a concurrently
232 dnl # building SPL package. If the file does not appear in time, a good
233 dnl # guess is made as to what this file will be named based on what it
234 dnl # is named in the kernel build products. This file will first be
235 dnl # used at link time so if the guess is wrong the build will fail
236 dnl # then. This unfortunately means the ZFS package does not contain a
237 dnl # reliable mechanism to detect symbols exported by the SPL at
238 dnl # configure time.
240 AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
241 AC_ARG_WITH([spl-timeout],
242 AS_HELP_STRING([--with-spl-timeout=SECS],
243 [Wait SECS for symvers file to appear @<:@default=0@:>@]),
244 [timeout="$withval"], [timeout=0])
246 AC_MSG_CHECKING([spl file name for module symbols])
250 AS_IF([test -r $SPL_OBJ/Module.symvers], [
251 SPL_SYMBOLS=Module.symvers
252 ], [test -r $SPL_OBJ/Modules.symvers], [
253 SPL_SYMBOLS=Modules.symvers
254 ], [test -r $SPL_OBJ/module/Module.symvers], [
255 SPL_SYMBOLS=Module.symvers
256 ], [test -r $SPL_OBJ/module/Modules.symvers], [
257 SPL_SYMBOLS=Modules.symvers
260 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
264 timeout=$((timeout-1))
268 AS_IF([test "$SPL_SYMBOLS" = NONE], [
269 SPL_SYMBOLS=$LINUX_SYMBOLS
272 AC_MSG_RESULT([$SPL_SYMBOLS])
273 AC_SUBST(SPL_SYMBOLS)
277 dnl # Detect the SPL module to be built against
279 AC_DEFUN([ZFS_AC_SPL], [
281 AS_HELP_STRING([--with-spl=PATH],
282 [Path to spl source]),
285 AC_ARG_WITH([spl-obj],
286 AS_HELP_STRING([--with-spl-obj=PATH],
287 [Path to spl build objects]),
288 [splbuild="$withval"])
291 AC_MSG_CHECKING([spl source directory])
292 AS_IF([test -z "$splsrc"], [
294 dnl # Look in the standard development package location
296 sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
297 2>/dev/null | tail -1`
300 dnl # Look in the DKMS source location
302 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
303 sourcelink=`ls -1d /var/lib/dkms/spl/*/build \
304 2>/dev/null | tail -1`
308 dnl # Look in the parent directory
310 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
315 dnl # Look in the kernel directory
317 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
321 AS_IF([test -e $sourcelink/spl_config.h], [
322 splsrc=`readlink -f ${sourcelink}`
324 AC_MSG_RESULT([Not found])
326 *** Please make sure the spl devel package for your distribution
327 *** is installed then try again. If that fails you can specify the
328 *** location of the spl source with the '--with-spl=PATH' option.])
331 AS_IF([test "$splsrc" = "NONE"], [
337 AC_MSG_RESULT([$splsrc])
338 AC_MSG_CHECKING([spl build directory])
339 AS_IF([test -z "$splbuild"], [
342 AC_MSG_RESULT([$splbuild])
344 AC_MSG_CHECKING([spl source version])
345 AS_IF([test -r $splbuild/spl_config.h &&
346 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
348 splsrcver=`(echo "#include <spl_config.h>";
349 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
351 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
354 AS_IF([test -z "$splsrcver"], [
355 AC_MSG_RESULT([Not found])
357 *** Cannot determine the version of the spl source.
358 *** Please prepare the spl source before running this script])
361 AC_MSG_RESULT([$splsrcver])
365 SPL_VERSION=${splsrcver}
369 AC_SUBST(SPL_VERSION)
371 ZFS_AC_SPL_MODULE_SYMVERS
375 dnl # Basic toolchain sanity check.
377 AC_DEFUN([ZFS_AC_TEST_MODULE],
378 [AC_MSG_CHECKING([whether modules can be built])
379 ZFS_LINUX_TRY_COMPILE([],[],[
383 if test "x$enable_linux_builtin" != xyes; then
384 AC_MSG_ERROR([*** Unable to build an empty module.])
387 *** Unable to build an empty module.
388 *** Please run 'make scripts' inside the kernel source tree.])
394 dnl # Certain kernel build options are not supported. These must be
395 dnl # detected at configure time and cause a build failure. Otherwise
396 dnl # modules may be successfully built that behave incorrectly.
398 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
400 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
401 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
402 [Define to 1 if licensed under the GPL])
405 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
409 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
411 dnl # This is typically only set for debug kernels because it comes with
412 dnl # a performance penalty. However, when it is set it maps the non-GPL
413 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
414 dnl # This will cause a failure at link time which we'd rather know about
415 dnl # at compile time.
417 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
418 dnl # with the upstream community we add a check to detect this case.
420 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
422 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
423 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
424 tmp_flags="$EXTRA_KCFLAGS"
425 ZFS_LINUX_TRY_COMPILE([
426 #include <linux/module.h>
427 #include <linux/mutex.h>
429 MODULE_LICENSE("$ZFS_META_LICENSE");
441 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
442 *** with the CDDL license and will prevent the module linking stage
443 *** from succeeding. You must rebuild your kernel without this
444 *** option enabled.])
446 EXTRA_KCFLAGS="$tmp_flags"
451 dnl # ZFS_LINUX_CONFTEST
453 AC_DEFUN([ZFS_LINUX_CONFTEST], [
454 cat confdefs.h - <<_ACEOF >conftest.c
460 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
462 m4_define([ZFS_LANG_PROGRAM], [
467 dnl Do *not* indent the following line: there may be CPP directives.
468 dnl Don't move the `;' right after for the same reason.
476 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
478 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
479 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
480 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
481 echo "obj-m := conftest.o" >build/Makefile
483 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
485 [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])],
487 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
493 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
495 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
496 [ZFS_LINUX_COMPILE_IFELSE(
497 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
499 [test -s build/conftest.o],
504 dnl # ZFS_LINUX_CONFIG
506 AC_DEFUN([ZFS_LINUX_CONFIG],
507 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
508 ZFS_LINUX_TRY_COMPILE([
509 #include <linux/module.h>
512 #error CONFIG_$1 not #defined
524 dnl # ZFS_CHECK_SYMBOL_EXPORT
525 dnl # check symbol exported or not
527 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
528 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
529 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
531 if test $rc -ne 0; then
534 grep -q -E "EXPORT_SYMBOL.*($1)" \
535 "$LINUX/$file" 2>/dev/null
537 if test $rc -eq 0; then
542 if test $export -eq 0; then :
553 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
554 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
555 dnl # is called if not compiling for builtin
557 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
558 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
559 if test $rc -ne 0; then :
562 if test "x$enable_linux_builtin" != xyes; then
563 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
565 if test $rc -ne 0; then :