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_NR_CACHED_OBJECTS
51 ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
52 ZFS_AC_KERNEL_FALLOCATE
53 ZFS_AC_KERNEL_MKDIR_UMODE_T
54 ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
55 ZFS_AC_KERNEL_CREATE_NAMEIDATA
56 ZFS_AC_KERNEL_TRUNCATE_RANGE
57 ZFS_AC_KERNEL_AUTOMOUNT
58 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
59 ZFS_AC_KERNEL_COMMIT_METADATA
60 ZFS_AC_KERNEL_CLEAR_INODE
61 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
62 ZFS_AC_KERNEL_D_MAKE_ROOT
63 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
64 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
65 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
66 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
67 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
68 ZFS_AC_KERNEL_MOUNT_NODEV
71 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
72 ZFS_AC_KERNEL_SET_NLINK
73 ZFS_AC_KERNEL_ELEVATOR_CHANGE
74 ZFS_AC_KERNEL_5ARG_SGET
76 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
77 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
79 AC_SUBST(KERNELMAKE_PARAMS)
82 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
83 dnl # compiler options are added by the kernel build system.
84 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
85 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
86 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
88 AC_SUBST(KERNELCPPFLAGS)
92 dnl # Detect name used for Module.symvers file in kernel
94 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
95 modpost=$LINUX/scripts/Makefile.modpost
96 AC_MSG_CHECKING([kernel file name for module symbols])
97 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
98 AS_IF([grep -q Modules.symvers $modpost], [
99 LINUX_SYMBOLS=Modules.symvers
101 LINUX_SYMBOLS=Module.symvers
104 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
106 *** Please make sure the kernel devel package for your distribution
107 *** is installed. If your building with a custom kernel make sure the
108 *** kernel is configured, built, and the '--with-linux=PATH' configure
109 *** option refers to the location of the kernel source.])
114 AC_MSG_RESULT($LINUX_SYMBOLS)
115 AC_SUBST(LINUX_SYMBOLS)
119 dnl # Detect the kernel to be built against
121 AC_DEFUN([ZFS_AC_KERNEL], [
123 AS_HELP_STRING([--with-linux=PATH],
124 [Path to kernel source]),
125 [kernelsrc="$withval"])
127 AC_ARG_WITH(linux-obj,
128 AS_HELP_STRING([--with-linux-obj=PATH],
129 [Path to kernel build objects]),
130 [kernelbuild="$withval"])
132 AC_MSG_CHECKING([kernel source directory])
133 AS_IF([test -z "$kernelsrc"], [
134 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
135 headersdir="/lib/modules/$(uname -r)/source"
136 sourcelink=$(readlink -f "$headersdir")
137 ], [test -e "/lib/modules/$(uname -r)/build"], [
138 headersdir="/lib/modules/$(uname -r)/build"
139 sourcelink=$(readlink -f "$headersdir")
141 sourcelink=$(ls -1d /usr/src/kernels/* \
143 2>/dev/null | grep -v obj | tail -1)
146 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
147 kernelsrc=`readlink -f ${sourcelink}`
149 AC_MSG_RESULT([Not found])
151 *** Please make sure the kernel devel package for your distribution
152 *** is installed then try again. If that fails you can specify the
153 *** location of the kernel source with the '--with-linux=PATH' option.])
156 AS_IF([test "$kernelsrc" = "NONE"], [
161 AC_MSG_RESULT([$kernelsrc])
162 AC_MSG_CHECKING([kernel build directory])
163 AS_IF([test -z "$kernelbuild"], [
164 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
165 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
166 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
167 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
168 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
169 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
170 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
171 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
173 kernelbuild=${kernelsrc}
176 AC_MSG_RESULT([$kernelbuild])
178 AC_MSG_CHECKING([kernel source version])
179 utsrelease1=$kernelbuild/include/linux/version.h
180 utsrelease2=$kernelbuild/include/linux/utsrelease.h
181 utsrelease3=$kernelbuild/include/generated/utsrelease.h
182 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
183 utsrelease=linux/version.h
184 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
185 utsrelease=linux/utsrelease.h
186 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
187 utsrelease=generated/utsrelease.h
190 AS_IF([test "$utsrelease"], [
191 kernsrcver=`(echo "#include <$utsrelease>";
192 echo "kernsrcver=UTS_RELEASE") |
193 cpp -I $kernelbuild/include |
194 grep "^kernsrcver=" | cut -d \" -f 2`
196 AS_IF([test -z "$kernsrcver"], [
197 AC_MSG_RESULT([Not found])
198 AC_MSG_ERROR([*** Cannot determine kernel version.])
201 AC_MSG_RESULT([Not found])
202 if test "x$enable_linux_builtin" != xyes; then
203 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
206 *** Cannot find UTS_RELEASE definition.
207 *** Please run 'make prepare' inside the kernel source tree.])
211 AC_MSG_RESULT([$kernsrcver])
214 LINUX_OBJ=${kernelbuild}
215 LINUX_VERSION=${kernsrcver}
219 AC_SUBST(LINUX_VERSION)
221 ZFS_AC_MODULE_SYMVERS
225 dnl # Detect name used for the additional SPL Module.symvers file. If one
226 dnl # does not exist this is likely because the SPL has been configured
227 dnl # but not built. The '--with-spl-timeout' option can be passed
228 dnl # to pause here, waiting for the file to appear from a concurrently
229 dnl # building SPL package. If the file does not appear in time, a good
230 dnl # guess is made as to what this file will be named based on what it
231 dnl # is named in the kernel build products. This file will first be
232 dnl # used at link time so if the guess is wrong the build will fail
233 dnl # then. This unfortunately means the ZFS package does not contain a
234 dnl # reliable mechanism to detect symbols exported by the SPL at
235 dnl # configure time.
237 AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
238 AC_ARG_WITH([spl-timeout],
239 AS_HELP_STRING([--with-spl-timeout=SECS],
240 [Wait SECS for symvers file to appear @<:@default=0@:>@]),
241 [timeout="$withval"], [timeout=0])
243 AC_MSG_CHECKING([spl file name for module symbols])
247 AS_IF([test -r $SPL_OBJ/Module.symvers], [
248 SPL_SYMBOLS=Module.symvers
249 ], [test -r $SPL_OBJ/Modules.symvers], [
250 SPL_SYMBOLS=Modules.symvers
251 ], [test -r $SPL_OBJ/module/Module.symvers], [
252 SPL_SYMBOLS=Module.symvers
253 ], [test -r $SPL_OBJ/module/Modules.symvers], [
254 SPL_SYMBOLS=Modules.symvers
257 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
261 timeout=$((timeout-1))
265 AS_IF([test "$SPL_SYMBOLS" = NONE], [
266 SPL_SYMBOLS=$LINUX_SYMBOLS
269 AC_MSG_RESULT([$SPL_SYMBOLS])
270 AC_SUBST(SPL_SYMBOLS)
274 dnl # Detect the SPL module to be built against
276 AC_DEFUN([ZFS_AC_SPL], [
278 AS_HELP_STRING([--with-spl=PATH],
279 [Path to spl source]),
282 AC_ARG_WITH([spl-obj],
283 AS_HELP_STRING([--with-spl-obj=PATH],
284 [Path to spl build objects]),
285 [splbuild="$withval"])
288 AC_MSG_CHECKING([spl source directory])
289 AS_IF([test -z "$splsrc"], [
291 dnl # Look in the standard development package location
293 sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
294 2>/dev/null | tail -1`
297 dnl # Look in the DKMS source location
299 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
300 sourcelink=`ls -1d /var/lib/dkms/spl/*/build \
301 2>/dev/null | tail -1`
305 dnl # Look in the parent directory
307 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
312 dnl # Look in the kernel directory
314 AS_IF([test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h], [
318 AS_IF([test -e $sourcelink/spl_config.h], [
319 splsrc=`readlink -f ${sourcelink}`
321 AC_MSG_RESULT([Not found])
323 *** Please make sure the spl devel package for your distribution
324 *** is installed then try again. If that fails you can specify the
325 *** location of the spl source with the '--with-spl=PATH' option.])
328 AS_IF([test "$splsrc" = "NONE"], [
334 AC_MSG_RESULT([$splsrc])
335 AC_MSG_CHECKING([spl build directory])
336 AS_IF([test -z "$splbuild"], [
339 AC_MSG_RESULT([$splbuild])
341 AC_MSG_CHECKING([spl source version])
342 AS_IF([test -r $splbuild/spl_config.h &&
343 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
345 splsrcver=`(echo "#include <spl_config.h>";
346 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
348 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
351 AS_IF([test -z "$splsrcver"], [
352 AC_MSG_RESULT([Not found])
354 *** Cannot determine the version of the spl source.
355 *** Please prepare the spl source before running this script])
358 AC_MSG_RESULT([$splsrcver])
362 SPL_VERSION=${splsrcver}
366 AC_SUBST(SPL_VERSION)
368 ZFS_AC_SPL_MODULE_SYMVERS
372 dnl # Basic toolchain sanity check.
374 AC_DEFUN([ZFS_AC_TEST_MODULE],
375 [AC_MSG_CHECKING([whether modules can be built])
376 ZFS_LINUX_TRY_COMPILE([],[],[
380 if test "x$enable_linux_builtin" != xyes; then
381 AC_MSG_ERROR([*** Unable to build an empty module.])
384 *** Unable to build an empty module.
385 *** Please run 'make scripts' inside the kernel source tree.])
391 dnl # Certain kernel build options are not supported. These must be
392 dnl # detected at configure time and cause a build failure. Otherwise
393 dnl # modules may be successfully built that behave incorrectly.
395 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
397 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
398 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
399 [Define to 1 if licensed under the GPL])
402 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
406 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
408 dnl # This is typically only set for debug kernels because it comes with
409 dnl # a performance penalty. However, when it is set it maps the non-GPL
410 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
411 dnl # This will cause a failure at link time which we'd rather know about
412 dnl # at compile time.
414 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
415 dnl # with the upstream community we add a check to detect this case.
417 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
419 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
420 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
421 tmp_flags="$EXTRA_KCFLAGS"
422 ZFS_LINUX_TRY_COMPILE([
423 #include <linux/module.h>
424 #include <linux/mutex.h>
426 MODULE_LICENSE("$ZFS_META_LICENSE");
438 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
439 *** with the CDDL license and will prevent the module linking stage
440 *** from succeeding. You must rebuild your kernel without this
441 *** option enabled.])
443 EXTRA_KCFLAGS="$tmp_flags"
448 dnl # ZFS_LINUX_CONFTEST
450 AC_DEFUN([ZFS_LINUX_CONFTEST], [
451 cat confdefs.h - <<_ACEOF >conftest.c
457 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
459 m4_define([ZFS_LANG_PROGRAM], [
464 dnl Do *not* indent the following line: there may be CPP directives.
465 dnl Don't move the `;' right after for the same reason.
473 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
475 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
476 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
477 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
478 echo "obj-m := conftest.o" >build/Makefile
480 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
482 [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])],
484 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
490 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
492 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
493 [ZFS_LINUX_COMPILE_IFELSE(
494 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
496 [test -s build/conftest.o],
501 dnl # ZFS_LINUX_CONFIG
503 AC_DEFUN([ZFS_LINUX_CONFIG],
504 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
505 ZFS_LINUX_TRY_COMPILE([
506 #include <linux/module.h>
509 #error CONFIG_$1 not #defined
521 dnl # ZFS_CHECK_SYMBOL_EXPORT
522 dnl # check symbol exported or not
524 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
525 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
526 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
528 if test $rc -ne 0; then
531 grep -q -E "EXPORT_SYMBOL.*($1)" \
532 "$LINUX/$file" 2>/dev/null
534 if test $rc -eq 0; then
539 if test $export -eq 0; then :
550 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
551 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
552 dnl # is called if not compiling for builtin
554 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
555 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
556 if test $rc -ne 0; then :
559 if test "x$enable_linux_builtin" != xyes; then
560 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
562 if test $rc -ne 0; then :