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_QUEUE_FLUSH
25 ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS
26 ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS
27 ZFS_AC_KERNEL_BLK_QUEUE_PHYSICAL_BLOCK_SIZE
28 ZFS_AC_KERNEL_BLK_QUEUE_IO_OPT
29 ZFS_AC_KERNEL_BLK_QUEUE_NONROT
30 ZFS_AC_KERNEL_BLK_QUEUE_DISCARD
31 ZFS_AC_KERNEL_BLK_FETCH_REQUEST
32 ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
33 ZFS_AC_KERNEL_BLK_RQ_BYTES
34 ZFS_AC_KERNEL_BLK_RQ_POS
35 ZFS_AC_KERNEL_BLK_RQ_SECTORS
36 ZFS_AC_KERNEL_GET_DISK_RO
37 ZFS_AC_KERNEL_RQ_IS_SYNC
38 ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT
39 ZFS_AC_KERNEL_CONST_XATTR_HANDLER
40 ZFS_AC_KERNEL_XATTR_HANDLER_GET
41 ZFS_AC_KERNEL_XATTR_HANDLER_SET
42 ZFS_AC_KERNEL_SHOW_OPTIONS
44 ZFS_AC_KERNEL_EVICT_INODE
45 ZFS_AC_KERNEL_NR_CACHED_OBJECTS
46 ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
47 ZFS_AC_KERNEL_FALLOCATE
48 ZFS_AC_KERNEL_AUTOMOUNT
49 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
50 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
51 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
52 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
53 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
54 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
55 ZFS_AC_KERNEL_MOUNT_NODEV
58 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
59 ZFS_AC_KERNEL_SET_NLINK
61 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
62 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
64 AC_SUBST(KERNELMAKE_PARAMS)
67 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
68 dnl # compiler options are added by the kernel build system.
69 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
70 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
71 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
73 AC_SUBST(KERNELCPPFLAGS)
77 dnl # Detect name used for Module.symvers file in kernel
79 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
80 modpost=$LINUX/scripts/Makefile.modpost
81 AC_MSG_CHECKING([kernel file name for module symbols])
82 AS_IF([test -f "$modpost"], [
83 AS_IF([grep -q Modules.symvers $modpost], [
84 LINUX_SYMBOLS=Modules.symvers
86 LINUX_SYMBOLS=Module.symvers
89 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
91 *** Please make sure the kernel devel package for your distribution
92 *** is installed. If your building with a custom kernel make sure the
93 *** kernel is configured, built, and the '--with-linux=PATH' configure
94 *** option refers to the location of the kernel source.])
99 AC_MSG_RESULT($LINUX_SYMBOLS)
100 AC_SUBST(LINUX_SYMBOLS)
104 dnl # Detect the kernel to be built against
106 AC_DEFUN([ZFS_AC_KERNEL], [
108 AS_HELP_STRING([--with-linux=PATH],
109 [Path to kernel source]),
110 [kernelsrc="$withval"])
112 AC_ARG_WITH(linux-obj,
113 AS_HELP_STRING([--with-linux-obj=PATH],
114 [Path to kernel build objects]),
115 [kernelbuild="$withval"])
117 AC_MSG_CHECKING([kernel source directory])
118 AS_IF([test -z "$kernelsrc"], [
119 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
120 headersdir="/lib/modules/$(uname -r)/source"
121 sourcelink=$(readlink -f "$headersdir")
122 ], [test -e "/lib/modules/$(uname -r)/build"], [
123 headersdir="/lib/modules/$(uname -r)/build"
124 sourcelink=$(readlink -f "$headersdir")
126 sourcelink=$(ls -1d /usr/src/kernels/* \
128 2>/dev/null | grep -v obj | tail -1)
131 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
132 kernelsrc=`readlink -f ${sourcelink}`
134 AC_MSG_RESULT([Not found])
136 *** Please make sure the kernel devel package for your distribution
137 *** is installed then try again. If that fails you can specify the
138 *** location of the kernel source with the '--with-linux=PATH' option.])
141 AS_IF([test "$kernelsrc" = "NONE"], [
146 AC_MSG_RESULT([$kernelsrc])
147 AC_MSG_CHECKING([kernel build directory])
148 AS_IF([test -z "$kernelbuild"], [
149 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
150 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
151 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
152 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
153 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
154 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
155 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
156 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
158 kernelbuild=${kernelsrc}
161 AC_MSG_RESULT([$kernelbuild])
163 AC_MSG_CHECKING([kernel source version])
164 utsrelease1=$kernelbuild/include/linux/version.h
165 utsrelease2=$kernelbuild/include/linux/utsrelease.h
166 utsrelease3=$kernelbuild/include/generated/utsrelease.h
167 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
168 utsrelease=linux/version.h
169 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
170 utsrelease=linux/utsrelease.h
171 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
172 utsrelease=generated/utsrelease.h
175 AS_IF([test "$utsrelease"], [
176 kernsrcver=`(echo "#include <$utsrelease>";
177 echo "kernsrcver=UTS_RELEASE") |
178 cpp -I $kernelbuild/include |
179 grep "^kernsrcver=" | cut -d \" -f 2`
181 AS_IF([test -z "$kernsrcver"], [
182 AC_MSG_RESULT([Not found])
183 AC_MSG_ERROR([*** Cannot determine kernel version.])
186 AC_MSG_RESULT([Not found])
187 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
190 AC_MSG_RESULT([$kernsrcver])
193 LINUX_OBJ=${kernelbuild}
194 LINUX_VERSION=${kernsrcver}
198 AC_SUBST(LINUX_VERSION)
200 ZFS_AC_MODULE_SYMVERS
204 dnl # Detect name used for the additional SPL Module.symvers file. If one
205 dnl # does not exist this is likely because the SPL has been configured
206 dnl # but not built. To allow recursive builds a good guess is made as to
207 dnl # what this file will be named based on what it is named in the kernel
208 dnl # build products. This file will first be used at link time so if
209 dnl # the guess is wrong the build will fail then. This unfortunately
210 dnl # means the ZFS package does not contain a reliable mechanism to
211 dnl # detect symbols exported by the SPL at configure time.
213 AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
214 AC_MSG_CHECKING([spl file name for module symbols])
215 AS_IF([test -r $SPL_OBJ/Module.symvers], [
216 SPL_SYMBOLS=Module.symvers
217 ], [test -r $SPL_OBJ/Modules.symvers], [
218 SPL_SYMBOLS=Modules.symvers
219 ], [test -r $SPL_OBJ/module/Module.symvers], [
220 SPL_SYMBOLS=Module.symvers
221 ], [test -r $SPL_OBJ/module/Modules.symvers], [
222 SPL_SYMBOLS=Modules.symvers
224 SPL_SYMBOLS=$LINUX_SYMBOLS
227 AC_MSG_RESULT([$SPL_SYMBOLS])
228 AC_SUBST(SPL_SYMBOLS)
232 dnl # Detect the SPL module to be built against
234 AC_DEFUN([ZFS_AC_SPL], [
236 AS_HELP_STRING([--with-spl=PATH],
237 [Path to spl source]),
240 AC_ARG_WITH([spl-obj],
241 AS_HELP_STRING([--with-spl-obj=PATH],
242 [Path to spl build objects]),
243 [splbuild="$withval"])
246 AC_MSG_CHECKING([spl source directory])
247 AS_IF([test -z "$splsrc"], [
248 sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
249 2>/dev/null | tail -1`
251 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink], [
255 AS_IF([test -e $sourcelink], [
256 splsrc=`readlink -f ${sourcelink}`
258 AC_MSG_RESULT([Not found])
260 *** Please make sure the spl devel package for your distribution
261 *** is installed then try again. If that fails you can specify the
262 *** location of the spl source with the '--with-spl=PATH' option.])
265 AS_IF([test "$splsrc" = "NONE"], [
271 AC_MSG_RESULT([$splsrc])
272 AC_MSG_CHECKING([spl build directory])
273 AS_IF([test -z "$splbuild"], [
276 AC_MSG_RESULT([$splbuild])
278 AC_MSG_CHECKING([spl source version])
279 AS_IF([test -r $splbuild/spl_config.h &&
280 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
282 splsrcver=`(echo "#include <spl_config.h>";
283 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
285 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
288 AS_IF([test -z "$splsrcver"], [
289 AC_MSG_RESULT([Not found])
291 *** Cannot determine the version of the spl source.
292 *** Please prepare the spl source before running this script])
295 AC_MSG_RESULT([$splsrcver])
299 SPL_VERSION=${splsrcver}
303 AC_SUBST(SPL_VERSION)
305 ZFS_AC_SPL_MODULE_SYMVERS
309 dnl # Certain kernel build options are not supported. These must be
310 dnl # detected at configure time and cause a build failure. Otherwise
311 dnl # modules may be successfully built that behave incorrectly.
313 dnl # CONFIG_PREEMPT - Preempt kernels require special handling.
315 dnl # There are certain kernel build options which when enabled are
316 dnl # completely incompatible with non GPL kernel modules. It is best
317 dnl # to detect these at configure time and fail with a clear error
318 dnl # rather than build everything and fail during linking.
320 dnl # CONFIG_DEBUG_LOCK_ALLOC - Maps mutex_lock() to mutex_lock_nested()
322 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
324 ZFS_LINUX_CONFIG([PREEMPT],
326 *** Kernel built with CONFIG_PREEMPT which is not supported.
327 *** You must rebuild your kernel without this option.]), [])
329 AS_IF([test "$ZFS_META_LICENSE" = CDDL], [
330 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC],
332 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is
333 *** incompatible with the CDDL license. You must rebuild
334 *** your kernel without this option.]), [])
337 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
338 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
339 [Define to 1 if licensed under the GPL])
344 dnl # ZFS_LINUX_CONFTEST
346 AC_DEFUN([ZFS_LINUX_CONFTEST], [
347 cat confdefs.h - <<_ACEOF >conftest.c
353 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
355 m4_define([ZFS_LANG_PROGRAM], [
360 dnl Do *not* indent the following line: there may be CPP directives.
361 dnl Don't move the `;' right after for the same reason.
369 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
371 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
372 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
373 rm -Rf build && mkdir -p build
374 echo "obj-m := conftest.o" >build/Makefile
376 [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])],
378 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
384 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
386 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
387 [ZFS_LINUX_COMPILE_IFELSE(
388 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
390 [test -s build/conftest.o],
395 dnl # ZFS_LINUX_CONFIG
397 AC_DEFUN([ZFS_LINUX_CONFIG],
398 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
399 ZFS_LINUX_TRY_COMPILE([
400 #include <linux/module.h>
403 #error CONFIG_$1 not #defined
415 dnl # ZFS_CHECK_SYMBOL_EXPORT
416 dnl # check symbol exported or not
418 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT],
419 [AC_MSG_CHECKING([whether symbol $1 is exported])
420 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
421 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
423 AS_IF([test $rc -ne 0], [
426 grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
428 AS_IF([test $rc -eq 0], [
433 AS_IF([test $export -eq 0], [