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_DIRTY_INODE_WITH_FLAGS
51 ZFS_AC_KERNEL_NR_CACHED_OBJECTS
52 ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
53 ZFS_AC_KERNEL_FALLOCATE
54 ZFS_AC_KERNEL_MKDIR_UMODE_T
55 ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
56 ZFS_AC_KERNEL_CREATE_NAMEIDATA
57 ZFS_AC_KERNEL_TRUNCATE_RANGE
58 ZFS_AC_KERNEL_AUTOMOUNT
59 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
60 ZFS_AC_KERNEL_COMMIT_METADATA
61 ZFS_AC_KERNEL_CLEAR_INODE
62 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
63 ZFS_AC_KERNEL_D_MAKE_ROOT
64 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
65 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
66 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
67 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
68 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
69 ZFS_AC_KERNEL_MOUNT_NODEV
72 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
73 ZFS_AC_KERNEL_SET_NLINK
74 ZFS_AC_KERNEL_ELEVATOR_CHANGE
75 ZFS_AC_KERNEL_5ARG_SGET
77 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
78 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
80 AC_SUBST(KERNELMAKE_PARAMS)
83 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
84 dnl # compiler options are added by the kernel build system.
85 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
86 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
87 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
89 AC_SUBST(KERNELCPPFLAGS)
93 dnl # Detect name used for Module.symvers file in kernel
95 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
96 modpost=$LINUX/scripts/Makefile.modpost
97 AC_MSG_CHECKING([kernel file name for module symbols])
98 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
99 AS_IF([grep -q Modules.symvers $modpost], [
100 LINUX_SYMBOLS=Modules.symvers
102 LINUX_SYMBOLS=Module.symvers
105 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
107 *** Please make sure the kernel devel package for your distribution
108 *** is installed. If your building with a custom kernel make sure the
109 *** kernel is configured, built, and the '--with-linux=PATH' configure
110 *** option refers to the location of the kernel source.])
115 AC_MSG_RESULT($LINUX_SYMBOLS)
116 AC_SUBST(LINUX_SYMBOLS)
120 dnl # Detect the kernel to be built against
122 AC_DEFUN([ZFS_AC_KERNEL], [
124 AS_HELP_STRING([--with-linux=PATH],
125 [Path to kernel source]),
126 [kernelsrc="$withval"])
128 AC_ARG_WITH(linux-obj,
129 AS_HELP_STRING([--with-linux-obj=PATH],
130 [Path to kernel build objects]),
131 [kernelbuild="$withval"])
133 AC_MSG_CHECKING([kernel source directory])
134 AS_IF([test -z "$kernelsrc"], [
135 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
136 headersdir="/lib/modules/$(uname -r)/source"
137 sourcelink=$(readlink -f "$headersdir")
138 ], [test -e "/lib/modules/$(uname -r)/build"], [
139 headersdir="/lib/modules/$(uname -r)/build"
140 sourcelink=$(readlink -f "$headersdir")
142 sourcelink=$(ls -1d /usr/src/kernels/* \
144 2>/dev/null | grep -v obj | tail -1)
147 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
148 kernelsrc=`readlink -f ${sourcelink}`
150 kernelsrc="[Not found]"
153 AS_IF([test "$kernelsrc" = "NONE"], [
158 AC_MSG_RESULT([$kernelsrc])
159 AS_IF([test ! -d "$kernelsrc"], [
161 *** Please make sure the kernel devel package for your distribution
162 *** is installed then try again. If that fails you can specify the
163 *** location of the kernel source with the '--with-linux=PATH' option.])
166 AC_MSG_CHECKING([kernel build directory])
167 AS_IF([test -z "$kernelbuild"], [
168 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
169 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
170 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
171 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
172 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
173 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
174 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
175 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
177 kernelbuild=${kernelsrc}
180 AC_MSG_RESULT([$kernelbuild])
182 AC_MSG_CHECKING([kernel source version])
183 utsrelease1=$kernelbuild/include/linux/version.h
184 utsrelease2=$kernelbuild/include/linux/utsrelease.h
185 utsrelease3=$kernelbuild/include/generated/utsrelease.h
186 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
187 utsrelease=linux/version.h
188 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
189 utsrelease=linux/utsrelease.h
190 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
191 utsrelease=generated/utsrelease.h
194 AS_IF([test "$utsrelease"], [
195 kernsrcver=`(echo "#include <$utsrelease>";
196 echo "kernsrcver=UTS_RELEASE") |
197 cpp -I $kernelbuild/include |
198 grep "^kernsrcver=" | cut -d \" -f 2`
200 AS_IF([test -z "$kernsrcver"], [
201 AC_MSG_RESULT([Not found])
202 AC_MSG_ERROR([*** Cannot determine kernel version.])
205 AC_MSG_RESULT([Not found])
206 if test "x$enable_linux_builtin" != xyes; then
207 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
210 *** Cannot find UTS_RELEASE definition.
211 *** Please run 'make prepare' inside the kernel source tree.])
215 AC_MSG_RESULT([$kernsrcver])
218 LINUX_OBJ=${kernelbuild}
219 LINUX_VERSION=${kernsrcver}
223 AC_SUBST(LINUX_VERSION)
225 ZFS_AC_MODULE_SYMVERS
229 dnl # Detect name used for the additional SPL Module.symvers file. If one
230 dnl # does not exist this is likely because the SPL has been configured
231 dnl # but not built. The '--with-spl-timeout' option can be passed
232 dnl # to pause here, waiting for the file to appear from a concurrently
233 dnl # building SPL package. If the file does not appear in time, a good
234 dnl # guess is made as to what this file will be named based on what it
235 dnl # is named in the kernel build products. This file will first be
236 dnl # used at link time so if the guess is wrong the build will fail
237 dnl # then. This unfortunately means the ZFS package does not contain a
238 dnl # reliable mechanism to detect symbols exported by the SPL at
239 dnl # configure time.
241 AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
242 AC_ARG_WITH([spl-timeout],
243 AS_HELP_STRING([--with-spl-timeout=SECS],
244 [Wait SECS for symvers file to appear @<:@default=0@:>@]),
245 [timeout="$withval"], [timeout=0])
247 AC_MSG_CHECKING([spl file name for module symbols])
251 AS_IF([test -r $SPL_OBJ/Module.symvers], [
252 SPL_SYMBOLS=Module.symvers
253 ], [test -r $SPL_OBJ/Modules.symvers], [
254 SPL_SYMBOLS=Modules.symvers
255 ], [test -r $SPL_OBJ/module/Module.symvers], [
256 SPL_SYMBOLS=Module.symvers
257 ], [test -r $SPL_OBJ/module/Modules.symvers], [
258 SPL_SYMBOLS=Modules.symvers
261 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
265 timeout=$((timeout-1))
269 AS_IF([test "$SPL_SYMBOLS" = NONE], [
270 SPL_SYMBOLS=$LINUX_SYMBOLS
273 AC_MSG_RESULT([$SPL_SYMBOLS])
274 AC_SUBST(SPL_SYMBOLS)
278 dnl # Detect the SPL module to be built against
280 AC_DEFUN([ZFS_AC_SPL], [
282 AS_HELP_STRING([--with-spl=PATH],
283 [Path to spl source]),
286 AC_ARG_WITH([spl-obj],
287 AS_HELP_STRING([--with-spl-obj=PATH],
288 [Path to spl build objects]),
289 [splbuild="$withval"])
292 AC_MSG_CHECKING([spl source directory])
293 AS_IF([test -z "$splsrc"], [
295 dnl # Look in the standard development package location
297 sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
298 2>/dev/null | tail -1`
301 dnl # Look in the DKMS source location
303 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
304 sourcelink=`ls -1d /var/lib/dkms/spl/*/build \
305 2>/dev/null | tail -1`
309 dnl # Look in the parent directory
311 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
316 dnl # Look in the kernel directory
318 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
322 AS_IF([test -e $sourcelink/spl_config.h], [
323 splsrc=`readlink -f ${sourcelink}`
325 AC_MSG_RESULT([Not found])
327 *** Please make sure the spl devel package for your distribution
328 *** is installed then try again. If that fails you can specify the
329 *** location of the spl source with the '--with-spl=PATH' option.])
332 AS_IF([test "$splsrc" = "NONE"], [
338 AC_MSG_RESULT([$splsrc])
339 AC_MSG_CHECKING([spl build directory])
340 AS_IF([test -z "$splbuild"], [
343 AC_MSG_RESULT([$splbuild])
345 AC_MSG_CHECKING([spl source version])
346 AS_IF([test -r $splbuild/spl_config.h &&
347 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
349 splsrcver=`(echo "#include <spl_config.h>";
350 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
352 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
355 AS_IF([test -z "$splsrcver"], [
356 AC_MSG_RESULT([Not found])
358 *** Cannot determine the version of the spl source.
359 *** Please prepare the spl source before running this script])
362 AC_MSG_RESULT([$splsrcver])
366 SPL_VERSION=${splsrcver}
370 AC_SUBST(SPL_VERSION)
372 ZFS_AC_SPL_MODULE_SYMVERS
376 dnl # Basic toolchain sanity check.
378 AC_DEFUN([ZFS_AC_TEST_MODULE],
379 [AC_MSG_CHECKING([whether modules can be built])
380 ZFS_LINUX_TRY_COMPILE([],[],[
384 if test "x$enable_linux_builtin" != xyes; then
385 AC_MSG_ERROR([*** Unable to build an empty module.])
388 *** Unable to build an empty module.
389 *** Please run 'make scripts' inside the kernel source tree.])
395 dnl # Certain kernel build options are not supported. These must be
396 dnl # detected at configure time and cause a build failure. Otherwise
397 dnl # modules may be successfully built that behave incorrectly.
399 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
401 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
402 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
403 [Define to 1 if licensed under the GPL])
406 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
410 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
412 dnl # This is typically only set for debug kernels because it comes with
413 dnl # a performance penalty. However, when it is set it maps the non-GPL
414 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
415 dnl # This will cause a failure at link time which we'd rather know about
416 dnl # at compile time.
418 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
419 dnl # with the upstream community we add a check to detect this case.
421 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
423 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
424 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
425 tmp_flags="$EXTRA_KCFLAGS"
426 ZFS_LINUX_TRY_COMPILE([
427 #include <linux/module.h>
428 #include <linux/mutex.h>
430 MODULE_LICENSE("$ZFS_META_LICENSE");
442 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
443 *** with the CDDL license and will prevent the module linking stage
444 *** from succeeding. You must rebuild your kernel without this
445 *** option enabled.])
447 EXTRA_KCFLAGS="$tmp_flags"
452 dnl # ZFS_LINUX_CONFTEST
454 AC_DEFUN([ZFS_LINUX_CONFTEST], [
455 cat confdefs.h - <<_ACEOF >conftest.c
461 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
463 m4_define([ZFS_LANG_PROGRAM], [
468 dnl Do *not* indent the following line: there may be CPP directives.
469 dnl Don't move the `;' right after for the same reason.
477 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
479 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
480 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
481 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
482 echo "obj-m := conftest.o" >build/Makefile
484 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
486 [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])],
488 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
494 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
496 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
497 [ZFS_LINUX_COMPILE_IFELSE(
498 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
500 [test -s build/conftest.o],
505 dnl # ZFS_LINUX_CONFIG
507 AC_DEFUN([ZFS_LINUX_CONFIG],
508 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
509 ZFS_LINUX_TRY_COMPILE([
510 #include <linux/module.h>
513 #error CONFIG_$1 not #defined
525 dnl # ZFS_CHECK_SYMBOL_EXPORT
526 dnl # check symbol exported or not
528 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
529 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
530 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
532 if test $rc -ne 0; then
535 grep -q -E "EXPORT_SYMBOL.*($1)" \
536 "$LINUX/$file" 2>/dev/null
538 if test $rc -eq 0; then
543 if test $export -eq 0; then :
554 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
555 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
556 dnl # is called if not compiling for builtin
558 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
559 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
560 if test $rc -ne 0; then :
563 if test "x$enable_linux_builtin" != xyes; then
564 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
566 if test $rc -ne 0; then :