2 dnl # Default ZFS kernel configuration
4 AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
8 ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
9 ZFS_AC_KERNEL_TYPE_FMODE_T
10 ZFS_AC_KERNEL_KOBJ_NAME_LEN
11 ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
12 ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
13 ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
14 ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
15 ZFS_AC_KERNEL_BIO_EMPTY_BARRIER
16 ZFS_AC_KERNEL_BIO_FAILFAST
17 ZFS_AC_KERNEL_BIO_FAILFAST_DTD
18 ZFS_AC_KERNEL_REQ_FAILFAST_MASK
19 ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
20 ZFS_AC_KERNEL_BIO_RW_SYNC
21 ZFS_AC_KERNEL_BIO_RW_SYNCIO
22 ZFS_AC_KERNEL_REQ_SYNC
23 ZFS_AC_KERNEL_BLK_END_REQUEST
24 ZFS_AC_KERNEL_BLK_FETCH_REQUEST
25 ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
26 ZFS_AC_KERNEL_BLK_RQ_BYTES
27 ZFS_AC_KERNEL_BLK_RQ_POS
28 ZFS_AC_KERNEL_BLK_RQ_SECTORS
29 ZFS_AC_KERNEL_GET_DISK_RO
30 ZFS_AC_KERNEL_RQ_IS_SYNC
31 ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT
32 ZFS_AC_KERNEL_CONST_XATTR_HANDLER
33 ZFS_AC_KERNEL_XATTR_HANDLER_GET
34 ZFS_AC_KERNEL_XATTR_HANDLER_SET
35 ZFS_AC_KERNEL_SHOW_OPTIONS
37 ZFS_AC_KERNEL_EVICT_INODE
38 ZFS_AC_KERNEL_NR_CACHED_OBJECTS
39 ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
40 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
41 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
42 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
43 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
44 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
45 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
46 ZFS_AC_KERNEL_MOUNT_NODEV
49 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
50 ZFS_AC_KERNEL_SET_NLINK
52 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
53 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
55 AC_SUBST(KERNELMAKE_PARAMS)
58 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
59 dnl # compiler options are added by the kernel build system.
60 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
61 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
62 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
64 AC_SUBST(KERNELCPPFLAGS)
68 dnl # Detect name used for Module.symvers file in kernel
70 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
71 modpost=$LINUX/scripts/Makefile.modpost
72 AC_MSG_CHECKING([kernel file name for module symbols])
73 AS_IF([test -f "$modpost"], [
74 AS_IF([grep -q Modules.symvers $modpost], [
75 LINUX_SYMBOLS=Modules.symvers
77 LINUX_SYMBOLS=Module.symvers
80 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
82 *** Please make sure the kernel devel package for your distribution
83 *** is installed. If your building with a custom kernel make sure the
84 *** kernel is configured, built, and the '--with-linux=PATH' configure
85 *** option refers to the location of the kernel source.])
90 AC_MSG_RESULT($LINUX_SYMBOLS)
91 AC_SUBST(LINUX_SYMBOLS)
95 dnl # Detect the kernel to be built against
97 AC_DEFUN([ZFS_AC_KERNEL], [
99 AS_HELP_STRING([--with-linux=PATH],
100 [Path to kernel source]),
101 [kernelsrc="$withval"])
103 AC_ARG_WITH(linux-obj,
104 AS_HELP_STRING([--with-linux-obj=PATH],
105 [Path to kernel build objects]),
106 [kernelbuild="$withval"])
108 AC_MSG_CHECKING([kernel source directory])
109 AS_IF([test -z "$kernelsrc"], [
110 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
111 headersdir="/lib/modules/$(uname -r)/source"
112 sourcelink=$(readlink -f "$headersdir")
113 ], [test -e "/lib/modules/$(uname -r)/build"], [
114 headersdir="/lib/modules/$(uname -r)/build"
115 sourcelink=$(readlink -f "$headersdir")
117 sourcelink=$(ls -1d /usr/src/kernels/* \
119 2>/dev/null | grep -v obj | tail -1)
122 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
123 kernelsrc=`readlink -f ${sourcelink}`
125 AC_MSG_RESULT([Not found])
127 *** Please make sure the kernel devel package for your distribution
128 *** is installed then try again. If that fails you can specify the
129 *** location of the kernel source with the '--with-linux=PATH' option.])
132 AS_IF([test "$kernelsrc" = "NONE"], [
137 AC_MSG_RESULT([$kernelsrc])
138 AC_MSG_CHECKING([kernel build directory])
139 AS_IF([test -z "$kernelbuild"], [
140 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
141 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
142 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
143 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
144 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
145 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
146 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
147 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
149 kernelbuild=${kernelsrc}
152 AC_MSG_RESULT([$kernelbuild])
154 AC_MSG_CHECKING([kernel source version])
155 utsrelease1=$kernelbuild/include/linux/version.h
156 utsrelease2=$kernelbuild/include/linux/utsrelease.h
157 utsrelease3=$kernelbuild/include/generated/utsrelease.h
158 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
159 utsrelease=linux/version.h
160 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
161 utsrelease=linux/utsrelease.h
162 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
163 utsrelease=generated/utsrelease.h
166 AS_IF([test "$utsrelease"], [
167 kernsrcver=`(echo "#include <$utsrelease>";
168 echo "kernsrcver=UTS_RELEASE") |
169 cpp -I $kernelbuild/include |
170 grep "^kernsrcver=" | cut -d \" -f 2`
172 AS_IF([test -z "$kernsrcver"], [
173 AC_MSG_RESULT([Not found])
174 AC_MSG_ERROR([*** Cannot determine kernel version.])
177 AC_MSG_RESULT([Not found])
178 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
181 AC_MSG_RESULT([$kernsrcver])
184 LINUX_OBJ=${kernelbuild}
185 LINUX_VERSION=${kernsrcver}
189 AC_SUBST(LINUX_VERSION)
191 ZFS_AC_MODULE_SYMVERS
195 dnl # Detect name used for the additional SPL Module.symvers file. If one
196 dnl # does not exist this is likely because the SPL has been configured
197 dnl # but not built. To allow recursive builds a good guess is made as to
198 dnl # what this file will be named based on what it is named in the kernel
199 dnl # build products. This file will first be used at link time so if
200 dnl # the guess is wrong the build will fail then. This unfortunately
201 dnl # means the ZFS package does not contain a reliable mechanism to
202 dnl # detect symbols exported by the SPL at configure time.
204 AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
205 AC_MSG_CHECKING([spl file name for module symbols])
206 AS_IF([test -r $SPL_OBJ/Module.symvers], [
207 SPL_SYMBOLS=Module.symvers
208 ], [test -r $SPL_OBJ/Modules.symvers], [
209 SPL_SYMBOLS=Modules.symvers
210 ], [test -r $SPL_OBJ/module/Module.symvers], [
211 SPL_SYMBOLS=Module.symvers
212 ], [test -r $SPL_OBJ/module/Modules.symvers], [
213 SPL_SYMBOLS=Modules.symvers
215 SPL_SYMBOLS=$LINUX_SYMBOLS
218 AC_MSG_RESULT([$SPL_SYMBOLS])
219 AC_SUBST(SPL_SYMBOLS)
223 dnl # Detect the SPL module to be built against
225 AC_DEFUN([ZFS_AC_SPL], [
227 AS_HELP_STRING([--with-spl=PATH],
228 [Path to spl source]),
231 AC_ARG_WITH([spl-obj],
232 AS_HELP_STRING([--with-spl-obj=PATH],
233 [Path to spl build objects]),
234 [splbuild="$withval"])
237 AC_MSG_CHECKING([spl source directory])
238 AS_IF([test -z "$splsrc"], [
239 sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
240 2>/dev/null | tail -1`
242 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink], [
246 AS_IF([test -e $sourcelink], [
247 splsrc=`readlink -f ${sourcelink}`
249 AC_MSG_RESULT([Not found])
251 *** Please make sure the spl devel package for your distribution
252 *** is installed then try again. If that fails you can specify the
253 *** location of the spl source with the '--with-spl=PATH' option.])
256 AS_IF([test "$splsrc" = "NONE"], [
262 AC_MSG_RESULT([$splsrc])
263 AC_MSG_CHECKING([spl build directory])
264 AS_IF([test -z "$splbuild"], [
267 AC_MSG_RESULT([$splbuild])
269 AC_MSG_CHECKING([spl source version])
270 AS_IF([test -r $splbuild/spl_config.h &&
271 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
273 splsrcver=`(echo "#include <spl_config.h>";
274 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
276 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
279 AS_IF([test -z "$splsrcver"], [
280 AC_MSG_RESULT([Not found])
282 *** Cannot determine the version of the spl source.
283 *** Please prepare the spl source before running this script])
286 AC_MSG_RESULT([$splsrcver])
290 SPL_VERSION=${splsrcver}
294 AC_SUBST(SPL_VERSION)
296 ZFS_AC_SPL_MODULE_SYMVERS
300 dnl # Certain kernel build options are not supported. These must be
301 dnl # detected at configure time and cause a build failure. Otherwise
302 dnl # modules may be successfully built that behave incorrectly.
304 dnl # CONFIG_PREEMPT - Preempt kernels require special handling.
306 dnl # There are certain kernel build options which when enabled are
307 dnl # completely incompatible with non GPL kernel modules. It is best
308 dnl # to detect these at configure time and fail with a clear error
309 dnl # rather than build everything and fail during linking.
311 dnl # CONFIG_DEBUG_LOCK_ALLOC - Maps mutex_lock() to mutex_lock_nested()
313 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
315 ZFS_LINUX_CONFIG([PREEMPT],
317 *** Kernel built with CONFIG_PREEMPT which is not supported.
318 *** You must rebuild your kernel without this option.]), [])
320 AS_IF([test "$ZFS_META_LICENSE" = CDDL], [
321 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC],
323 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is
324 *** incompatible with the CDDL license. You must rebuild
325 *** your kernel without this option.]), [])
328 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
329 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
330 [Define to 1 if licensed under the GPL])
335 dnl # ZFS_LINUX_CONFTEST
337 AC_DEFUN([ZFS_LINUX_CONFTEST], [
338 cat confdefs.h - <<_ACEOF >conftest.c
344 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
346 m4_define([ZFS_LANG_PROGRAM], [
351 dnl Do *not* indent the following line: there may be CPP directives.
352 dnl Don't move the `;' right after for the same reason.
360 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
362 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
363 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
364 rm -Rf build && mkdir -p build
365 echo "obj-m := conftest.o" >build/Makefile
367 [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) >/dev/null && AC_TRY_COMMAND([$3])],
369 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
375 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
377 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
378 [ZFS_LINUX_COMPILE_IFELSE(
379 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
381 [test -s build/conftest.o],
386 dnl # ZFS_LINUX_CONFIG
388 AC_DEFUN([ZFS_LINUX_CONFIG],
389 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
390 ZFS_LINUX_TRY_COMPILE([
391 #include <linux/module.h>
394 #error CONFIG_$1 not #defined
406 dnl # ZFS_CHECK_SYMBOL_EXPORT
407 dnl # check symbol exported or not
409 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT],
410 [AC_MSG_CHECKING([whether symbol $1 is exported])
411 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
412 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
414 AS_IF([test $rc -ne 0], [
417 grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
419 AS_IF([test $rc -eq 0], [
424 AS_IF([test $export -eq 0], [