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_MKDIR_UMODE_T
53 ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
54 ZFS_AC_KERNEL_CREATE_NAMEIDATA
55 ZFS_AC_KERNEL_TRUNCATE_RANGE
56 ZFS_AC_KERNEL_AUTOMOUNT
57 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
58 ZFS_AC_KERNEL_COMMIT_METADATA
59 ZFS_AC_KERNEL_CLEAR_INODE
60 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
61 ZFS_AC_KERNEL_D_MAKE_ROOT
62 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
63 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
64 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
65 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
66 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
67 ZFS_AC_KERNEL_MOUNT_NODEV
70 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
71 ZFS_AC_KERNEL_SET_NLINK
72 ZFS_AC_KERNEL_ELEVATOR_CHANGE
73 ZFS_AC_KERNEL_5ARG_SGET
75 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
76 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
78 AC_SUBST(KERNELMAKE_PARAMS)
81 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
82 dnl # compiler options are added by the kernel build system.
83 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
84 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
85 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
87 AC_SUBST(KERNELCPPFLAGS)
91 dnl # Detect name used for Module.symvers file in kernel
93 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
94 modpost=$LINUX/scripts/Makefile.modpost
95 AC_MSG_CHECKING([kernel file name for module symbols])
96 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
97 AS_IF([grep -q Modules.symvers $modpost], [
98 LINUX_SYMBOLS=Modules.symvers
100 LINUX_SYMBOLS=Module.symvers
103 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
105 *** Please make sure the kernel devel package for your distribution
106 *** is installed. If your building with a custom kernel make sure the
107 *** kernel is configured, built, and the '--with-linux=PATH' configure
108 *** option refers to the location of the kernel source.])
113 AC_MSG_RESULT($LINUX_SYMBOLS)
114 AC_SUBST(LINUX_SYMBOLS)
118 dnl # Detect the kernel to be built against
120 AC_DEFUN([ZFS_AC_KERNEL], [
122 AS_HELP_STRING([--with-linux=PATH],
123 [Path to kernel source]),
124 [kernelsrc="$withval"])
126 AC_ARG_WITH(linux-obj,
127 AS_HELP_STRING([--with-linux-obj=PATH],
128 [Path to kernel build objects]),
129 [kernelbuild="$withval"])
131 AC_MSG_CHECKING([kernel source directory])
132 AS_IF([test -z "$kernelsrc"], [
133 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
134 headersdir="/lib/modules/$(uname -r)/source"
135 sourcelink=$(readlink -f "$headersdir")
136 ], [test -e "/lib/modules/$(uname -r)/build"], [
137 headersdir="/lib/modules/$(uname -r)/build"
138 sourcelink=$(readlink -f "$headersdir")
140 sourcelink=$(ls -1d /usr/src/kernels/* \
142 2>/dev/null | grep -v obj | tail -1)
145 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
146 kernelsrc=`readlink -f ${sourcelink}`
148 AC_MSG_RESULT([Not found])
150 *** Please make sure the kernel devel package for your distribution
151 *** is installed then try again. If that fails you can specify the
152 *** location of the kernel source with the '--with-linux=PATH' option.])
155 AS_IF([test "$kernelsrc" = "NONE"], [
160 AC_MSG_RESULT([$kernelsrc])
161 AC_MSG_CHECKING([kernel build directory])
162 AS_IF([test -z "$kernelbuild"], [
163 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
164 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
165 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
166 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
167 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
168 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
169 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
170 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
172 kernelbuild=${kernelsrc}
175 AC_MSG_RESULT([$kernelbuild])
177 AC_MSG_CHECKING([kernel source version])
178 utsrelease1=$kernelbuild/include/linux/version.h
179 utsrelease2=$kernelbuild/include/linux/utsrelease.h
180 utsrelease3=$kernelbuild/include/generated/utsrelease.h
181 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
182 utsrelease=linux/version.h
183 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
184 utsrelease=linux/utsrelease.h
185 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
186 utsrelease=generated/utsrelease.h
189 AS_IF([test "$utsrelease"], [
190 kernsrcver=`(echo "#include <$utsrelease>";
191 echo "kernsrcver=UTS_RELEASE") |
192 cpp -I $kernelbuild/include |
193 grep "^kernsrcver=" | cut -d \" -f 2`
195 AS_IF([test -z "$kernsrcver"], [
196 AC_MSG_RESULT([Not found])
197 AC_MSG_ERROR([*** Cannot determine kernel version.])
200 AC_MSG_RESULT([Not found])
201 if test "x$enable_linux_builtin" != xyes; then
202 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
205 *** Cannot find UTS_RELEASE definition.
206 *** Please run 'make prepare' inside the kernel source tree.])
210 AC_MSG_RESULT([$kernsrcver])
213 LINUX_OBJ=${kernelbuild}
214 LINUX_VERSION=${kernsrcver}
218 AC_SUBST(LINUX_VERSION)
220 ZFS_AC_MODULE_SYMVERS
224 dnl # Detect name used for the additional SPL Module.symvers file. If one
225 dnl # does not exist this is likely because the SPL has been configured
226 dnl # but not built. The '--with-spl-timeout' option can be passed
227 dnl # to pause here, waiting for the file to appear from a concurrently
228 dnl # building SPL package. If the file does not appear in time, a good
229 dnl # guess is made as to what this file will be named based on what it
230 dnl # is named in the kernel build products. This file will first be
231 dnl # used at link time so if the guess is wrong the build will fail
232 dnl # then. This unfortunately means the ZFS package does not contain a
233 dnl # reliable mechanism to detect symbols exported by the SPL at
234 dnl # configure time.
236 AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
237 AC_ARG_WITH([spl-timeout],
238 AS_HELP_STRING([--with-spl-timeout=SECS],
239 [Wait SECS for symvers file to appear @<:@default=0@:>@]),
240 [timeout="$withval"], [timeout=0])
242 AC_MSG_CHECKING([spl file name for module symbols])
246 AS_IF([test -r $SPL_OBJ/Module.symvers], [
247 SPL_SYMBOLS=Module.symvers
248 ], [test -r $SPL_OBJ/Modules.symvers], [
249 SPL_SYMBOLS=Modules.symvers
250 ], [test -r $SPL_OBJ/module/Module.symvers], [
251 SPL_SYMBOLS=Module.symvers
252 ], [test -r $SPL_OBJ/module/Modules.symvers], [
253 SPL_SYMBOLS=Modules.symvers
256 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
260 timeout=$((timeout-1))
264 AS_IF([test "$SPL_SYMBOLS" = NONE], [
265 SPL_SYMBOLS=$LINUX_SYMBOLS
268 AC_MSG_RESULT([$SPL_SYMBOLS])
269 AC_SUBST(SPL_SYMBOLS)
273 dnl # Detect the SPL module to be built against
275 AC_DEFUN([ZFS_AC_SPL], [
277 AS_HELP_STRING([--with-spl=PATH],
278 [Path to spl source]),
281 AC_ARG_WITH([spl-obj],
282 AS_HELP_STRING([--with-spl-obj=PATH],
283 [Path to spl build objects]),
284 [splbuild="$withval"])
287 AC_MSG_CHECKING([spl source directory])
288 AS_IF([test -z "$splsrc"], [
290 dnl # Look in the standard development package location
292 sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
293 2>/dev/null | tail -1`
296 dnl # Look in the DKMS source location
298 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
299 sourcelink=`ls -1d /var/lib/dkms/spl/*/build \
300 2>/dev/null | tail -1`
304 dnl # Look in the parent directory
306 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
311 dnl # Look in the kernel directory
313 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
317 AS_IF([test -e $sourcelink/spl_config.h], [
318 splsrc=`readlink -f ${sourcelink}`
320 AC_MSG_RESULT([Not found])
322 *** Please make sure the spl devel package for your distribution
323 *** is installed then try again. If that fails you can specify the
324 *** location of the spl source with the '--with-spl=PATH' option.])
327 AS_IF([test "$splsrc" = "NONE"], [
333 AC_MSG_RESULT([$splsrc])
334 AC_MSG_CHECKING([spl build directory])
335 AS_IF([test -z "$splbuild"], [
338 AC_MSG_RESULT([$splbuild])
340 AC_MSG_CHECKING([spl source version])
341 AS_IF([test -r $splbuild/spl_config.h &&
342 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
344 splsrcver=`(echo "#include <spl_config.h>";
345 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
347 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
350 AS_IF([test -z "$splsrcver"], [
351 AC_MSG_RESULT([Not found])
353 *** Cannot determine the version of the spl source.
354 *** Please prepare the spl source before running this script])
357 AC_MSG_RESULT([$splsrcver])
361 SPL_VERSION=${splsrcver}
365 AC_SUBST(SPL_VERSION)
367 ZFS_AC_SPL_MODULE_SYMVERS
371 dnl # Basic toolchain sanity check.
373 AC_DEFUN([ZFS_AC_TEST_MODULE],
374 [AC_MSG_CHECKING([whether modules can be built])
375 ZFS_LINUX_TRY_COMPILE([],[],[
379 if test "x$enable_linux_builtin" != xyes; then
380 AC_MSG_ERROR([*** Unable to build an empty module.])
383 *** Unable to build an empty module.
384 *** Please run 'make scripts' inside the kernel source tree.])
390 dnl # Certain kernel build options are not supported. These must be
391 dnl # detected at configure time and cause a build failure. Otherwise
392 dnl # modules may be successfully built that behave incorrectly.
394 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
396 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
397 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
398 [Define to 1 if licensed under the GPL])
401 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
405 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
407 dnl # This is typically only set for debug kernels because it comes with
408 dnl # a performance penalty. However, when it is set it maps the non-GPL
409 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
410 dnl # This will cause a failure at link time which we'd rather know about
411 dnl # at compile time.
413 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
414 dnl # with the upstream community we add a check to detect this case.
416 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
418 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
419 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
420 tmp_flags="$EXTRA_KCFLAGS"
421 ZFS_LINUX_TRY_COMPILE([
422 #include <linux/module.h>
423 #include <linux/mutex.h>
425 MODULE_LICENSE("$ZFS_META_LICENSE");
437 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
438 *** with the CDDL license and will prevent the module linking stage
439 *** from succeeding. You must rebuild your kernel without this
440 *** option enabled.])
442 EXTRA_KCFLAGS="$tmp_flags"
447 dnl # ZFS_LINUX_CONFTEST
449 AC_DEFUN([ZFS_LINUX_CONFTEST], [
450 cat confdefs.h - <<_ACEOF >conftest.c
456 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
458 m4_define([ZFS_LANG_PROGRAM], [
463 dnl Do *not* indent the following line: there may be CPP directives.
464 dnl Don't move the `;' right after for the same reason.
472 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
474 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
475 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
476 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
477 echo "obj-m := conftest.o" >build/Makefile
479 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
481 [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])],
483 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
489 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
491 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
492 [ZFS_LINUX_COMPILE_IFELSE(
493 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
495 [test -s build/conftest.o],
500 dnl # ZFS_LINUX_CONFIG
502 AC_DEFUN([ZFS_LINUX_CONFIG],
503 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
504 ZFS_LINUX_TRY_COMPILE([
505 #include <linux/module.h>
508 #error CONFIG_$1 not #defined
520 dnl # ZFS_CHECK_SYMBOL_EXPORT
521 dnl # check symbol exported or not
523 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
524 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
525 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
527 if test $rc -ne 0; then
530 grep -q -E "EXPORT_SYMBOL.*($1)" \
531 "$LINUX/$file" 2>/dev/null
533 if test $rc -eq 0; then
538 if test $export -eq 0; then :
549 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
550 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
551 dnl # is called if not compiling for builtin
553 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
554 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
555 if test $rc -ne 0; then :
558 if test "x$enable_linux_builtin" != xyes; then
559 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
561 if test $rc -ne 0; then :