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_BIO_EMPTY_BARRIER
18 ZFS_AC_KERNEL_BIO_FAILFAST
19 ZFS_AC_KERNEL_BIO_FAILFAST_DTD
20 ZFS_AC_KERNEL_REQ_FAILFAST_MASK
21 ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
22 ZFS_AC_KERNEL_BIO_RW_SYNC
23 ZFS_AC_KERNEL_BIO_RW_SYNCIO
24 ZFS_AC_KERNEL_REQ_SYNC
25 ZFS_AC_KERNEL_BLK_END_REQUEST
26 ZFS_AC_KERNEL_BLK_QUEUE_FLUSH
27 ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS
28 ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS
29 ZFS_AC_KERNEL_BLK_QUEUE_PHYSICAL_BLOCK_SIZE
30 ZFS_AC_KERNEL_BLK_QUEUE_IO_OPT
31 ZFS_AC_KERNEL_BLK_QUEUE_NONROT
32 ZFS_AC_KERNEL_BLK_QUEUE_DISCARD
33 ZFS_AC_KERNEL_BLK_FETCH_REQUEST
34 ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
35 ZFS_AC_KERNEL_BLK_RQ_BYTES
36 ZFS_AC_KERNEL_BLK_RQ_POS
37 ZFS_AC_KERNEL_BLK_RQ_SECTORS
38 ZFS_AC_KERNEL_GET_DISK_RO
39 ZFS_AC_KERNEL_GET_GENDISK
40 ZFS_AC_KERNEL_RQ_IS_SYNC
41 ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT
42 ZFS_AC_KERNEL_DISCARD_GRANULARITY
43 ZFS_AC_KERNEL_CONST_XATTR_HANDLER
44 ZFS_AC_KERNEL_XATTR_HANDLER_GET
45 ZFS_AC_KERNEL_XATTR_HANDLER_SET
46 ZFS_AC_KERNEL_SHOW_OPTIONS
48 ZFS_AC_KERNEL_EVICT_INODE
49 ZFS_AC_KERNEL_NR_CACHED_OBJECTS
50 ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
51 ZFS_AC_KERNEL_FALLOCATE
52 ZFS_AC_KERNEL_TRUNCATE_RANGE
53 ZFS_AC_KERNEL_CREATE_UMODE_T
54 ZFS_AC_KERNEL_AUTOMOUNT
55 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
56 ZFS_AC_KERNEL_COMMIT_METADATA
57 ZFS_AC_KERNEL_CLEAR_INODE
58 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
59 ZFS_AC_KERNEL_D_MAKE_ROOT
60 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
61 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
62 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
63 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
64 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
65 ZFS_AC_KERNEL_MOUNT_NODEV
68 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
69 ZFS_AC_KERNEL_SET_NLINK
70 ZFS_AC_KERNEL_ELEVATOR_CHANGE
72 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
73 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
75 AC_SUBST(KERNELMAKE_PARAMS)
78 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
79 dnl # compiler options are added by the kernel build system.
80 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
81 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
82 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
84 AC_SUBST(KERNELCPPFLAGS)
88 dnl # Detect name used for Module.symvers file in kernel
90 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
91 modpost=$LINUX/scripts/Makefile.modpost
92 AC_MSG_CHECKING([kernel file name for module symbols])
93 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
94 AS_IF([grep -q Modules.symvers $modpost], [
95 LINUX_SYMBOLS=Modules.symvers
97 LINUX_SYMBOLS=Module.symvers
100 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
102 *** Please make sure the kernel devel package for your distribution
103 *** is installed. If your building with a custom kernel make sure the
104 *** kernel is configured, built, and the '--with-linux=PATH' configure
105 *** option refers to the location of the kernel source.])
110 AC_MSG_RESULT($LINUX_SYMBOLS)
111 AC_SUBST(LINUX_SYMBOLS)
115 dnl # Detect the kernel to be built against
117 AC_DEFUN([ZFS_AC_KERNEL], [
119 AS_HELP_STRING([--with-linux=PATH],
120 [Path to kernel source]),
121 [kernelsrc="$withval"])
123 AC_ARG_WITH(linux-obj,
124 AS_HELP_STRING([--with-linux-obj=PATH],
125 [Path to kernel build objects]),
126 [kernelbuild="$withval"])
128 AC_MSG_CHECKING([kernel source directory])
129 AS_IF([test -z "$kernelsrc"], [
130 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
131 headersdir="/lib/modules/$(uname -r)/source"
132 sourcelink=$(readlink -f "$headersdir")
133 ], [test -e "/lib/modules/$(uname -r)/build"], [
134 headersdir="/lib/modules/$(uname -r)/build"
135 sourcelink=$(readlink -f "$headersdir")
137 sourcelink=$(ls -1d /usr/src/kernels/* \
139 2>/dev/null | grep -v obj | tail -1)
142 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
143 kernelsrc=`readlink -f ${sourcelink}`
145 AC_MSG_RESULT([Not found])
147 *** Please make sure the kernel devel package for your distribution
148 *** is installed then try again. If that fails you can specify the
149 *** location of the kernel source with the '--with-linux=PATH' option.])
152 AS_IF([test "$kernelsrc" = "NONE"], [
157 AC_MSG_RESULT([$kernelsrc])
158 AC_MSG_CHECKING([kernel build directory])
159 AS_IF([test -z "$kernelbuild"], [
160 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
161 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
162 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
163 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
164 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
165 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
166 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
167 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
169 kernelbuild=${kernelsrc}
172 AC_MSG_RESULT([$kernelbuild])
174 AC_MSG_CHECKING([kernel source version])
175 utsrelease1=$kernelbuild/include/linux/version.h
176 utsrelease2=$kernelbuild/include/linux/utsrelease.h
177 utsrelease3=$kernelbuild/include/generated/utsrelease.h
178 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
179 utsrelease=linux/version.h
180 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
181 utsrelease=linux/utsrelease.h
182 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
183 utsrelease=generated/utsrelease.h
186 AS_IF([test "$utsrelease"], [
187 kernsrcver=`(echo "#include <$utsrelease>";
188 echo "kernsrcver=UTS_RELEASE") |
189 cpp -I $kernelbuild/include |
190 grep "^kernsrcver=" | cut -d \" -f 2`
192 AS_IF([test -z "$kernsrcver"], [
193 AC_MSG_RESULT([Not found])
194 AC_MSG_ERROR([*** Cannot determine kernel version.])
197 AC_MSG_RESULT([Not found])
198 if test "x$enable_linux_builtin" != xyes; then
199 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
202 *** Cannot find UTS_RELEASE definition.
203 *** Please run 'make prepare' inside the kernel source tree.])
207 AC_MSG_RESULT([$kernsrcver])
210 LINUX_OBJ=${kernelbuild}
211 LINUX_VERSION=${kernsrcver}
215 AC_SUBST(LINUX_VERSION)
217 ZFS_AC_MODULE_SYMVERS
221 dnl # Detect name used for the additional SPL Module.symvers file. If one
222 dnl # does not exist this is likely because the SPL has been configured
223 dnl # but not built. The '--with-spl-timeout' option can be passed
224 dnl # to pause here, waiting for the file to appear from a concurrently
225 dnl # building SPL package. If the file does not appear in time, a good
226 dnl # guess is made as to what this file will be named based on what it
227 dnl # is named in the kernel build products. This file will first be
228 dnl # used at link time so if the guess is wrong the build will fail
229 dnl # then. This unfortunately means the ZFS package does not contain a
230 dnl # reliable mechanism to detect symbols exported by the SPL at
231 dnl # configure time.
233 AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
234 AC_ARG_WITH([spl-timeout],
235 AS_HELP_STRING([--with-spl-timeout=SECS],
236 [Wait SECS for symvers file to appear @<:@default=0@:>@]),
237 [timeout="$withval"], [timeout=0])
239 AC_MSG_CHECKING([spl file name for module symbols])
243 AS_IF([test -r $SPL_OBJ/Module.symvers], [
244 SPL_SYMBOLS=Module.symvers
245 ], [test -r $SPL_OBJ/Modules.symvers], [
246 SPL_SYMBOLS=Modules.symvers
247 ], [test -r $SPL_OBJ/module/Module.symvers], [
248 SPL_SYMBOLS=Module.symvers
249 ], [test -r $SPL_OBJ/module/Modules.symvers], [
250 SPL_SYMBOLS=Modules.symvers
253 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
257 timeout=$((timeout-1))
261 AS_IF([test "$SPL_SYMBOLS" = NONE], [
262 SPL_SYMBOLS=$LINUX_SYMBOLS
265 AC_MSG_RESULT([$SPL_SYMBOLS])
266 AC_SUBST(SPL_SYMBOLS)
270 dnl # Detect the SPL module to be built against
272 AC_DEFUN([ZFS_AC_SPL], [
274 AS_HELP_STRING([--with-spl=PATH],
275 [Path to spl source]),
278 AC_ARG_WITH([spl-obj],
279 AS_HELP_STRING([--with-spl-obj=PATH],
280 [Path to spl build objects]),
281 [splbuild="$withval"])
284 AC_MSG_CHECKING([spl source directory])
285 AS_IF([test -z "$splsrc"], [
287 dnl # Look in the standard development package location
289 sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
290 2>/dev/null | tail -1`
293 dnl # Look in the DKMS source location
295 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
296 sourcelink=`ls -1d /var/lib/dkms/spl/*/build \
297 2>/dev/null | tail -1`
301 dnl # Look in the parent directory
303 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
308 dnl # Look in the kernel directory
310 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
314 AS_IF([test -e $sourcelink/spl_config.h], [
315 splsrc=`readlink -f ${sourcelink}`
317 AC_MSG_RESULT([Not found])
319 *** Please make sure the spl devel package for your distribution
320 *** is installed then try again. If that fails you can specify the
321 *** location of the spl source with the '--with-spl=PATH' option.])
324 AS_IF([test "$splsrc" = "NONE"], [
330 AC_MSG_RESULT([$splsrc])
331 AC_MSG_CHECKING([spl build directory])
332 AS_IF([test -z "$splbuild"], [
335 AC_MSG_RESULT([$splbuild])
337 AC_MSG_CHECKING([spl source version])
338 AS_IF([test -r $splbuild/spl_config.h &&
339 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
341 splsrcver=`(echo "#include <spl_config.h>";
342 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
344 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
347 AS_IF([test -z "$splsrcver"], [
348 AC_MSG_RESULT([Not found])
350 *** Cannot determine the version of the spl source.
351 *** Please prepare the spl source before running this script])
354 AC_MSG_RESULT([$splsrcver])
358 SPL_VERSION=${splsrcver}
362 AC_SUBST(SPL_VERSION)
364 ZFS_AC_SPL_MODULE_SYMVERS
368 dnl # Basic toolchain sanity check.
370 AC_DEFUN([ZFS_AC_TEST_MODULE],
371 [AC_MSG_CHECKING([whether modules can be built])
372 ZFS_LINUX_TRY_COMPILE([],[],[
376 if test "x$enable_linux_builtin" != xyes; then
377 AC_MSG_ERROR([*** Unable to build an empty module.])
380 *** Unable to build an empty module.
381 *** Please run 'make scripts' inside the kernel source tree.])
387 dnl # Certain kernel build options are not supported. These must be
388 dnl # detected at configure time and cause a build failure. Otherwise
389 dnl # modules may be successfully built that behave incorrectly.
391 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
393 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
394 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
395 [Define to 1 if licensed under the GPL])
398 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
402 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
404 dnl # This is typically only set for debug kernels because it comes with
405 dnl # a performance penalty. However, when it is set it maps the non-GPL
406 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
407 dnl # This will cause a failure at link time which we'd rather know about
408 dnl # at compile time.
410 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
411 dnl # with the upstream community we add a check to detect this case.
413 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
415 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
416 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
417 tmp_flags="$EXTRA_KCFLAGS"
418 ZFS_LINUX_TRY_COMPILE([
419 #include <linux/module.h>
420 #include <linux/mutex.h>
422 MODULE_LICENSE("$ZFS_META_LICENSE");
434 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
435 *** with the CDDL license and will prevent the module linking stage
436 *** from succeeding. You must rebuild your kernel without this
437 *** option enabled.])
439 EXTRA_KCFLAGS="$tmp_flags"
444 dnl # ZFS_LINUX_CONFTEST
446 AC_DEFUN([ZFS_LINUX_CONFTEST], [
447 cat confdefs.h - <<_ACEOF >conftest.c
453 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
455 m4_define([ZFS_LANG_PROGRAM], [
460 dnl Do *not* indent the following line: there may be CPP directives.
461 dnl Don't move the `;' right after for the same reason.
469 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
471 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
472 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
473 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
474 echo "obj-m := conftest.o" >build/Makefile
476 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
478 [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])],
480 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
486 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
488 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
489 [ZFS_LINUX_COMPILE_IFELSE(
490 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
492 [test -s build/conftest.o],
497 dnl # ZFS_LINUX_CONFIG
499 AC_DEFUN([ZFS_LINUX_CONFIG],
500 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
501 ZFS_LINUX_TRY_COMPILE([
502 #include <linux/module.h>
505 #error CONFIG_$1 not #defined
517 dnl # ZFS_CHECK_SYMBOL_EXPORT
518 dnl # check symbol exported or not
520 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
521 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
522 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
524 if test $rc -ne 0; then
527 grep -q -E "EXPORT_SYMBOL.*($1)" \
528 "$LINUX/$file" 2>/dev/null
530 if test $rc -eq 0; then
535 if test $export -eq 0; then :
546 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
547 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
548 dnl # is called if not compiling for builtin
550 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
551 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
552 if test $rc -ne 0; then :
555 if test "x$enable_linux_builtin" != xyes; then
556 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
558 if test $rc -ne 0; then :