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_LOOKUP_BDEV
16 ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
17 ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
18 ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE
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_D_SET_D_OP
66 ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA
67 ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS
68 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
69 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
70 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
71 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
72 ZFS_AC_KERNEL_MOUNT_NODEV
76 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
77 ZFS_AC_KERNEL_SET_NLINK
78 ZFS_AC_KERNEL_ELEVATOR_CHANGE
79 ZFS_AC_KERNEL_5ARG_SGET
80 ZFS_AC_KERNEL_LSEEK_EXECUTE
82 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
83 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
85 AC_SUBST(KERNELMAKE_PARAMS)
88 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
89 dnl # compiler options are added by the kernel build system.
90 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
91 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
92 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
94 AC_SUBST(KERNELCPPFLAGS)
98 dnl # Detect name used for Module.symvers file in kernel
100 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
101 modpost=$LINUX/scripts/Makefile.modpost
102 AC_MSG_CHECKING([kernel file name for module symbols])
103 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
104 AS_IF([grep -q Modules.symvers $modpost], [
105 LINUX_SYMBOLS=Modules.symvers
107 LINUX_SYMBOLS=Module.symvers
110 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
112 *** Please make sure the kernel devel package for your distribution
113 *** is installed. If you are building with a custom kernel, make sure the
114 *** kernel is configured, built, and the '--with-linux=PATH' configure
115 *** option refers to the location of the kernel source.])
120 AC_MSG_RESULT($LINUX_SYMBOLS)
121 AC_SUBST(LINUX_SYMBOLS)
125 dnl # Detect the kernel to be built against
127 AC_DEFUN([ZFS_AC_KERNEL], [
129 AS_HELP_STRING([--with-linux=PATH],
130 [Path to kernel source]),
131 [kernelsrc="$withval"])
133 AC_ARG_WITH(linux-obj,
134 AS_HELP_STRING([--with-linux-obj=PATH],
135 [Path to kernel build objects]),
136 [kernelbuild="$withval"])
138 AC_MSG_CHECKING([kernel source directory])
139 AS_IF([test -z "$kernelsrc"], [
140 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
141 headersdir="/lib/modules/$(uname -r)/source"
142 sourcelink=$(readlink -f "$headersdir")
143 ], [test -e "/lib/modules/$(uname -r)/build"], [
144 headersdir="/lib/modules/$(uname -r)/build"
145 sourcelink=$(readlink -f "$headersdir")
147 sourcelink=$(ls -1d /usr/src/kernels/* \
149 2>/dev/null | grep -v obj | tail -1)
152 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
153 kernelsrc=`readlink -f ${sourcelink}`
155 kernelsrc="[Not found]"
158 AS_IF([test "$kernelsrc" = "NONE"], [
163 AC_MSG_RESULT([$kernelsrc])
164 AS_IF([test ! -d "$kernelsrc"], [
166 *** Please make sure the kernel devel package for your distribution
167 *** is installed and then try again. If that fails, you can specify the
168 *** location of the kernel source with the '--with-linux=PATH' option.])
171 AC_MSG_CHECKING([kernel build directory])
172 AS_IF([test -z "$kernelbuild"], [
173 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
174 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
175 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
176 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
177 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
178 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
179 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
180 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
182 kernelbuild=${kernelsrc}
185 AC_MSG_RESULT([$kernelbuild])
187 AC_MSG_CHECKING([kernel source version])
188 utsrelease1=$kernelbuild/include/linux/version.h
189 utsrelease2=$kernelbuild/include/linux/utsrelease.h
190 utsrelease3=$kernelbuild/include/generated/utsrelease.h
191 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
192 utsrelease=linux/version.h
193 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
194 utsrelease=linux/utsrelease.h
195 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
196 utsrelease=generated/utsrelease.h
199 AS_IF([test "$utsrelease"], [
200 kernsrcver=`(echo "#include <$utsrelease>";
201 echo "kernsrcver=UTS_RELEASE") |
202 cpp -I $kernelbuild/include |
203 grep "^kernsrcver=" | cut -d \" -f 2`
205 AS_IF([test -z "$kernsrcver"], [
206 AC_MSG_RESULT([Not found])
207 AC_MSG_ERROR([*** Cannot determine kernel version.])
210 AC_MSG_RESULT([Not found])
211 if test "x$enable_linux_builtin" != xyes; then
212 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
215 *** Cannot find UTS_RELEASE definition.
216 *** Please run 'make prepare' inside the kernel source tree.])
220 AC_MSG_RESULT([$kernsrcver])
223 LINUX_OBJ=${kernelbuild}
224 LINUX_VERSION=${kernsrcver}
228 AC_SUBST(LINUX_VERSION)
230 ZFS_AC_MODULE_SYMVERS
235 dnl # Detect the SPL module to be built against
237 AC_DEFUN([ZFS_AC_SPL], [
239 AS_HELP_STRING([--with-spl=PATH],
240 [Path to spl source]),
243 AC_ARG_WITH([spl-obj],
244 AS_HELP_STRING([--with-spl-obj=PATH],
245 [Path to spl build objects]),
246 [splbuild="$withval"])
248 AC_ARG_WITH([spl-timeout],
249 AS_HELP_STRING([--with-spl-timeout=SECS],
250 [Wait SECS for SPL header and symver file @<:@default=0@:>@]),
251 [timeout="$withval"], [timeout=0])
254 dnl # The existence of spl.release.in is used to identify a valid
255 dnl # source directory. In order of preference:
257 splsrc0="/var/lib/dkms/spl/${VERSION}/build"
258 splsrc1="/usr/src/spl-${VERSION}/${LINUX_VERSION}"
259 splsrc2="/usr/src/spl-${VERSION}"
263 AC_MSG_CHECKING([spl source directory])
264 AS_IF([test -z "${splsrc}"], [
265 AS_IF([ test -e "${splsrc0}/spl.release.in"], [
267 ], [ test -e "${splsrc1}/spl.release.in"], [
269 ], [ test -e "${splsrc2}/spl.release.in"], [
271 ], [ test -e "${splsrc3}/spl.release.in"], [
272 splsrc=$(readlink -f "${splsrc3}")
273 ], [ test -e "${splsrc4}/spl.release.in" ], [
279 AS_IF([test "$splsrc" = "NONE"], [
285 AC_MSG_RESULT([$splsrc])
286 AS_IF([ test ! -e "$splsrc/spl.release.in"], [
288 *** Please make sure the kmod spl devel package for your distribution
289 *** is installed then try again. If that fails you can specify the
290 *** location of the spl source with the '--with-spl=PATH' option.])
294 dnl # The existence of the spl_config.h is used to identify a valid
295 dnl # spl object directory. In many cases the object and source
296 dnl # directory are the same, however the objects may also reside
297 dnl # is a subdirectory named after the kernel version.
299 dnl # This file is supposed to be available after DKMS finishes
300 dnl # building the SPL kernel module for the target kernel. The
301 dnl # '--with-spl-timeout' option can be passed to pause here,
302 dnl # waiting for the file to appear from a concurrently building
305 AC_MSG_CHECKING([spl build directory])
307 AS_IF([test -z "$splbuild"], [
308 AS_IF([ test -e "${splsrc}/${LINUX_VERSION}/spl_config.h" ], [
309 splbuild="${splsrc}/${LINUX_VERSION}"
310 ], [ test -e "${splsrc}/spl_config.h" ], [
313 splbuild="[Not found]"
316 AS_IF([test -e "$splbuild/spl_config.h" -o $timeout -le 0], [
320 timeout=$((timeout-1))
324 AC_MSG_RESULT([$splbuild])
325 AS_IF([ ! test -e "$splbuild/spl_config.h"], [
327 *** Please make sure the kmod spl devel <kernel> package for your
328 *** distribution is installed then try again. If that fails you
329 *** can specify the location of the spl objects with the
330 *** '--with-spl-obj=PATH' option.])
333 AC_MSG_CHECKING([spl source version])
334 AS_IF([test -r $splbuild/spl_config.h &&
335 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
337 splsrcver=`(echo "#include <spl_config.h>";
338 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
340 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
343 AS_IF([test -z "$splsrcver"], [
344 AC_MSG_RESULT([Not found])
346 *** Cannot determine the version of the spl source.
347 *** Please prepare the spl source before running this script])
350 AC_MSG_RESULT([$splsrcver])
354 SPL_VERSION=${splsrcver}
358 AC_SUBST(SPL_VERSION)
361 dnl # Detect the name used for the SPL Module.symvers file. If one
362 dnl # does not exist this is likely because the SPL has been configured
363 dnl # but not built. The '--with-spl-timeout' option can be passed
364 dnl # to pause here, waiting for the file to appear from a concurrently
365 dnl # building SPL package. If the file does not appear in time, a good
366 dnl # guess is made as to what this file will be named based on what it
367 dnl # is named in the kernel build products. This file will first be
368 dnl # used at link time so if the guess is wrong the build will fail
369 dnl # then. This unfortunately means the ZFS package does not contain a
370 dnl # reliable mechanism to detect symbols exported by the SPL at
371 dnl # configure time.
373 AC_MSG_CHECKING([spl file name for module symbols])
377 AS_IF([test -r $SPL_OBJ/Module.symvers], [
378 SPL_SYMBOLS=Module.symvers
379 ], [test -r $SPL_OBJ/Modules.symvers], [
380 SPL_SYMBOLS=Modules.symvers
381 ], [test -r $SPL_OBJ/module/Module.symvers], [
382 SPL_SYMBOLS=Module.symvers
383 ], [test -r $SPL_OBJ/module/Modules.symvers], [
384 SPL_SYMBOLS=Modules.symvers
387 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
391 timeout=$((timeout-1))
395 AS_IF([test "$SPL_SYMBOLS" = NONE], [
396 SPL_SYMBOLS=$LINUX_SYMBOLS
399 AC_MSG_RESULT([$SPL_SYMBOLS])
400 AC_SUBST(SPL_SYMBOLS)
404 dnl # Basic toolchain sanity check.
406 AC_DEFUN([ZFS_AC_TEST_MODULE],
407 [AC_MSG_CHECKING([whether modules can be built])
408 ZFS_LINUX_TRY_COMPILE([],[],[
412 if test "x$enable_linux_builtin" != xyes; then
413 AC_MSG_ERROR([*** Unable to build an empty module.])
416 *** Unable to build an empty module.
417 *** Please run 'make scripts' inside the kernel source tree.])
423 dnl # Certain kernel build options are not supported. These must be
424 dnl # detected at configure time and cause a build failure. Otherwise
425 dnl # modules may be successfully built that behave incorrectly.
427 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
429 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
430 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
431 [Define to 1 if licensed under the GPL])
434 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
438 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
440 dnl # This is typically only set for debug kernels because it comes with
441 dnl # a performance penalty. However, when it is set it maps the non-GPL
442 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
443 dnl # This will cause a failure at link time which we'd rather know about
444 dnl # at compile time.
446 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
447 dnl # with the upstream community we add a check to detect this case.
449 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
451 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
452 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
453 tmp_flags="$EXTRA_KCFLAGS"
454 ZFS_LINUX_TRY_COMPILE([
455 #include <linux/module.h>
456 #include <linux/mutex.h>
458 MODULE_LICENSE("$ZFS_META_LICENSE");
470 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
471 *** with the CDDL license and will prevent the module linking stage
472 *** from succeeding. You must rebuild your kernel without this
473 *** option enabled.])
475 EXTRA_KCFLAGS="$tmp_flags"
480 dnl # ZFS_LINUX_CONFTEST
482 AC_DEFUN([ZFS_LINUX_CONFTEST], [
483 cat confdefs.h - <<_ACEOF >conftest.c
489 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
491 m4_define([ZFS_LANG_PROGRAM], [
496 dnl Do *not* indent the following line: there may be CPP directives.
497 dnl Don't move the `;' right after for the same reason.
505 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
507 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
508 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
509 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
510 echo "obj-m := conftest.o" >build/Makefile
512 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
514 [AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
516 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
522 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
524 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
525 [ZFS_LINUX_COMPILE_IFELSE(
526 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
528 [test -s build/conftest.o],
533 dnl # ZFS_LINUX_CONFIG
535 AC_DEFUN([ZFS_LINUX_CONFIG],
536 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
537 ZFS_LINUX_TRY_COMPILE([
538 #include <linux/module.h>
541 #error CONFIG_$1 not #defined
553 dnl # ZFS_CHECK_SYMBOL_EXPORT
554 dnl # check symbol exported or not
556 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
557 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
558 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
560 if test $rc -ne 0; then
563 grep -q -E "EXPORT_SYMBOL.*($1)" \
564 "$LINUX/$file" 2>/dev/null
566 if test $rc -eq 0; then
571 if test $export -eq 0; then :
582 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
583 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
584 dnl # is called if not compiling for builtin
586 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
587 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
588 if test $rc -ne 0; then :
591 if test "x$enable_linux_builtin" != xyes; then
592 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
594 if test $rc -ne 0; then :