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_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID
11 ZFS_AC_KERNEL_TYPE_FMODE_T
12 ZFS_AC_KERNEL_KOBJ_NAME_LEN
13 ZFS_AC_KERNEL_3ARG_BLKDEV_GET
14 ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
15 ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
16 ZFS_AC_KERNEL_LOOKUP_BDEV
17 ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
18 ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
19 ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE
20 ZFS_AC_KERNEL_BIO_FAILFAST
21 ZFS_AC_KERNEL_BIO_FAILFAST_DTD
22 ZFS_AC_KERNEL_REQ_FAILFAST_MASK
23 ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
24 ZFS_AC_KERNEL_BIO_RW_SYNC
25 ZFS_AC_KERNEL_BIO_RW_SYNCIO
26 ZFS_AC_KERNEL_REQ_SYNC
27 ZFS_AC_KERNEL_BLK_END_REQUEST
28 ZFS_AC_KERNEL_BLK_QUEUE_FLUSH
29 ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS
30 ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS
31 ZFS_AC_KERNEL_BLK_QUEUE_PHYSICAL_BLOCK_SIZE
32 ZFS_AC_KERNEL_BLK_QUEUE_IO_OPT
33 ZFS_AC_KERNEL_BLK_QUEUE_NONROT
34 ZFS_AC_KERNEL_BLK_QUEUE_DISCARD
35 ZFS_AC_KERNEL_BLK_FETCH_REQUEST
36 ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
37 ZFS_AC_KERNEL_BLK_RQ_BYTES
38 ZFS_AC_KERNEL_BLK_RQ_POS
39 ZFS_AC_KERNEL_BLK_RQ_SECTORS
40 ZFS_AC_KERNEL_GET_DISK_RO
41 ZFS_AC_KERNEL_GET_GENDISK
42 ZFS_AC_KERNEL_RQ_IS_SYNC
43 ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT
44 ZFS_AC_KERNEL_DISCARD_GRANULARITY
45 ZFS_AC_KERNEL_CONST_XATTR_HANDLER
46 ZFS_AC_KERNEL_XATTR_HANDLER_GET
47 ZFS_AC_KERNEL_XATTR_HANDLER_SET
48 ZFS_AC_KERNEL_SHOW_OPTIONS
50 ZFS_AC_KERNEL_EVICT_INODE
51 ZFS_AC_KERNEL_DIRTY_INODE_WITH_FLAGS
52 ZFS_AC_KERNEL_NR_CACHED_OBJECTS
53 ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
54 ZFS_AC_KERNEL_FALLOCATE
55 ZFS_AC_KERNEL_MKDIR_UMODE_T
56 ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
57 ZFS_AC_KERNEL_CREATE_NAMEIDATA
58 ZFS_AC_KERNEL_TRUNCATE_RANGE
59 ZFS_AC_KERNEL_AUTOMOUNT
60 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
61 ZFS_AC_KERNEL_COMMIT_METADATA
62 ZFS_AC_KERNEL_CLEAR_INODE
63 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
64 ZFS_AC_KERNEL_D_MAKE_ROOT
65 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
66 ZFS_AC_KERNEL_D_SET_D_OP
67 ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA
68 ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS
69 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
70 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
71 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
72 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
73 ZFS_AC_KERNEL_MOUNT_NODEV
77 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
78 ZFS_AC_KERNEL_SET_NLINK
79 ZFS_AC_KERNEL_ELEVATOR_CHANGE
80 ZFS_AC_KERNEL_5ARG_SGET
81 ZFS_AC_KERNEL_LSEEK_EXECUTE
83 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
84 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
86 AC_SUBST(KERNELMAKE_PARAMS)
89 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
90 dnl # compiler options are added by the kernel build system.
91 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
92 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
93 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
95 AC_SUBST(KERNELCPPFLAGS)
99 dnl # Detect name used for Module.symvers file in kernel
101 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
102 modpost=$LINUX/scripts/Makefile.modpost
103 AC_MSG_CHECKING([kernel file name for module symbols])
104 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
105 AS_IF([grep -q Modules.symvers $modpost], [
106 LINUX_SYMBOLS=Modules.symvers
108 LINUX_SYMBOLS=Module.symvers
111 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
113 *** Please make sure the kernel devel package for your distribution
114 *** is installed. If you are building with a custom kernel, make sure the
115 *** kernel is configured, built, and the '--with-linux=PATH' configure
116 *** option refers to the location of the kernel source.])
121 AC_MSG_RESULT($LINUX_SYMBOLS)
122 AC_SUBST(LINUX_SYMBOLS)
126 dnl # Detect the kernel to be built against
128 AC_DEFUN([ZFS_AC_KERNEL], [
130 AS_HELP_STRING([--with-linux=PATH],
131 [Path to kernel source]),
132 [kernelsrc="$withval"])
134 AC_ARG_WITH(linux-obj,
135 AS_HELP_STRING([--with-linux-obj=PATH],
136 [Path to kernel build objects]),
137 [kernelbuild="$withval"])
139 AC_MSG_CHECKING([kernel source directory])
140 AS_IF([test -z "$kernelsrc"], [
141 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
142 headersdir="/lib/modules/$(uname -r)/source"
143 sourcelink=$(readlink -f "$headersdir")
144 ], [test -e "/lib/modules/$(uname -r)/build"], [
145 headersdir="/lib/modules/$(uname -r)/build"
146 sourcelink=$(readlink -f "$headersdir")
148 sourcelink=$(ls -1d /usr/src/kernels/* \
150 2>/dev/null | grep -v obj | tail -1)
153 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
154 kernelsrc=`readlink -f ${sourcelink}`
156 kernelsrc="[Not found]"
159 AS_IF([test "$kernelsrc" = "NONE"], [
164 AC_MSG_RESULT([$kernelsrc])
165 AS_IF([test ! -d "$kernelsrc"], [
167 *** Please make sure the kernel devel package for your distribution
168 *** is installed and then try again. If that fails, you can specify the
169 *** location of the kernel source with the '--with-linux=PATH' option.])
172 AC_MSG_CHECKING([kernel build directory])
173 AS_IF([test -z "$kernelbuild"], [
174 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
175 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
176 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
177 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
178 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
179 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
180 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
181 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
183 kernelbuild=${kernelsrc}
186 AC_MSG_RESULT([$kernelbuild])
188 AC_MSG_CHECKING([kernel source version])
189 utsrelease1=$kernelbuild/include/linux/version.h
190 utsrelease2=$kernelbuild/include/linux/utsrelease.h
191 utsrelease3=$kernelbuild/include/generated/utsrelease.h
192 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
193 utsrelease=linux/version.h
194 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
195 utsrelease=linux/utsrelease.h
196 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
197 utsrelease=generated/utsrelease.h
200 AS_IF([test "$utsrelease"], [
201 kernsrcver=`(echo "#include <$utsrelease>";
202 echo "kernsrcver=UTS_RELEASE") |
203 cpp -I $kernelbuild/include |
204 grep "^kernsrcver=" | cut -d \" -f 2`
206 AS_IF([test -z "$kernsrcver"], [
207 AC_MSG_RESULT([Not found])
208 AC_MSG_ERROR([*** Cannot determine kernel version.])
211 AC_MSG_RESULT([Not found])
212 if test "x$enable_linux_builtin" != xyes; then
213 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
216 *** Cannot find UTS_RELEASE definition.
217 *** Please run 'make prepare' inside the kernel source tree.])
221 AC_MSG_RESULT([$kernsrcver])
224 LINUX_OBJ=${kernelbuild}
225 LINUX_VERSION=${kernsrcver}
229 AC_SUBST(LINUX_VERSION)
231 ZFS_AC_MODULE_SYMVERS
236 dnl # Detect the SPL module to be built against
238 AC_DEFUN([ZFS_AC_SPL], [
240 AS_HELP_STRING([--with-spl=PATH],
241 [Path to spl source]),
244 AC_ARG_WITH([spl-obj],
245 AS_HELP_STRING([--with-spl-obj=PATH],
246 [Path to spl build objects]),
247 [splbuild="$withval"])
249 AC_ARG_WITH([spl-timeout],
250 AS_HELP_STRING([--with-spl-timeout=SECS],
251 [Wait SECS for SPL header and symver file @<:@default=0@:>@]),
252 [timeout="$withval"], [timeout=0])
255 dnl # The existence of spl.release.in is used to identify a valid
256 dnl # source directory. In order of preference:
258 splsrc0="/var/lib/dkms/spl/${VERSION}/build"
259 splsrc1="/usr/src/spl-${VERSION}/${LINUX_VERSION}"
260 splsrc2="/usr/src/spl-${VERSION}"
264 AC_MSG_CHECKING([spl source directory])
265 AS_IF([test -z "${splsrc}"], [
266 AS_IF([ test -e "${splsrc0}/spl.release.in"], [
268 ], [ test -e "${splsrc1}/spl.release.in"], [
270 ], [ test -e "${splsrc2}/spl.release.in"], [
272 ], [ test -e "${splsrc3}/spl.release.in"], [
273 splsrc=$(readlink -f "${splsrc3}")
274 ], [ test -e "${splsrc4}/spl.release.in" ], [
280 AS_IF([test "$splsrc" = "NONE"], [
286 AC_MSG_RESULT([$splsrc])
287 AS_IF([ test ! -e "$splsrc/spl.release.in"], [
289 *** Please make sure the kmod spl devel package for your distribution
290 *** is installed then try again. If that fails you can specify the
291 *** location of the spl source with the '--with-spl=PATH' option.])
295 dnl # The existence of the spl_config.h is used to identify a valid
296 dnl # spl object directory. In many cases the object and source
297 dnl # directory are the same, however the objects may also reside
298 dnl # is a subdirectory named after the kernel version.
300 dnl # This file is supposed to be available after DKMS finishes
301 dnl # building the SPL kernel module for the target kernel. The
302 dnl # '--with-spl-timeout' option can be passed to pause here,
303 dnl # waiting for the file to appear from a concurrently building
306 AC_MSG_CHECKING([spl build directory])
308 AS_IF([test -z "$splbuild"], [
309 AS_IF([ test -e "${splsrc}/${LINUX_VERSION}/spl_config.h" ], [
310 splbuild="${splsrc}/${LINUX_VERSION}"
311 ], [ test -e "${splsrc}/spl_config.h" ], [
314 splbuild="[Not found]"
317 AS_IF([test -e "$splbuild/spl_config.h" -o $timeout -le 0], [
321 timeout=$((timeout-1))
325 AC_MSG_RESULT([$splbuild])
326 AS_IF([ ! test -e "$splbuild/spl_config.h"], [
328 *** Please make sure the kmod spl devel <kernel> package for your
329 *** distribution is installed then try again. If that fails you
330 *** can specify the location of the spl objects with the
331 *** '--with-spl-obj=PATH' option.])
334 AC_MSG_CHECKING([spl source version])
335 AS_IF([test -r $splbuild/spl_config.h &&
336 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
338 splsrcver=`(echo "#include <spl_config.h>";
339 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
341 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
344 AS_IF([test -z "$splsrcver"], [
345 AC_MSG_RESULT([Not found])
347 *** Cannot determine the version of the spl source.
348 *** Please prepare the spl source before running this script])
351 AC_MSG_RESULT([$splsrcver])
355 SPL_VERSION=${splsrcver}
359 AC_SUBST(SPL_VERSION)
362 dnl # Detect the name used for the SPL Module.symvers file. If one
363 dnl # does not exist this is likely because the SPL has been configured
364 dnl # but not built. The '--with-spl-timeout' option can be passed
365 dnl # to pause here, waiting for the file to appear from a concurrently
366 dnl # building SPL package. If the file does not appear in time, a good
367 dnl # guess is made as to what this file will be named based on what it
368 dnl # is named in the kernel build products. This file will first be
369 dnl # used at link time so if the guess is wrong the build will fail
370 dnl # then. This unfortunately means the ZFS package does not contain a
371 dnl # reliable mechanism to detect symbols exported by the SPL at
372 dnl # configure time.
374 AC_MSG_CHECKING([spl file name for module symbols])
378 AS_IF([test -r $SPL_OBJ/Module.symvers], [
379 SPL_SYMBOLS=Module.symvers
380 ], [test -r $SPL_OBJ/Modules.symvers], [
381 SPL_SYMBOLS=Modules.symvers
382 ], [test -r $SPL_OBJ/module/Module.symvers], [
383 SPL_SYMBOLS=Module.symvers
384 ], [test -r $SPL_OBJ/module/Modules.symvers], [
385 SPL_SYMBOLS=Modules.symvers
388 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
392 timeout=$((timeout-1))
396 AS_IF([test "$SPL_SYMBOLS" = NONE], [
397 SPL_SYMBOLS=$LINUX_SYMBOLS
400 AC_MSG_RESULT([$SPL_SYMBOLS])
401 AC_SUBST(SPL_SYMBOLS)
405 dnl # Basic toolchain sanity check.
407 AC_DEFUN([ZFS_AC_TEST_MODULE],
408 [AC_MSG_CHECKING([whether modules can be built])
409 ZFS_LINUX_TRY_COMPILE([],[],[
413 if test "x$enable_linux_builtin" != xyes; then
414 AC_MSG_ERROR([*** Unable to build an empty module.])
417 *** Unable to build an empty module.
418 *** Please run 'make scripts' inside the kernel source tree.])
424 dnl # Certain kernel build options are not supported. These must be
425 dnl # detected at configure time and cause a build failure. Otherwise
426 dnl # modules may be successfully built that behave incorrectly.
428 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
430 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
431 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
432 [Define to 1 if licensed under the GPL])
435 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
439 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
441 dnl # This is typically only set for debug kernels because it comes with
442 dnl # a performance penalty. However, when it is set it maps the non-GPL
443 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
444 dnl # This will cause a failure at link time which we'd rather know about
445 dnl # at compile time.
447 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
448 dnl # with the upstream community we add a check to detect this case.
450 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
452 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
453 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
454 tmp_flags="$EXTRA_KCFLAGS"
455 ZFS_LINUX_TRY_COMPILE([
456 #include <linux/module.h>
457 #include <linux/mutex.h>
459 MODULE_LICENSE("$ZFS_META_LICENSE");
471 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
472 *** with the CDDL license and will prevent the module linking stage
473 *** from succeeding. You must rebuild your kernel without this
474 *** option enabled.])
476 EXTRA_KCFLAGS="$tmp_flags"
481 dnl # ZFS_LINUX_CONFTEST
483 AC_DEFUN([ZFS_LINUX_CONFTEST], [
484 cat confdefs.h - <<_ACEOF >conftest.c
490 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
492 m4_define([ZFS_LANG_PROGRAM], [
497 dnl Do *not* indent the following line: there may be CPP directives.
498 dnl Don't move the `;' right after for the same reason.
506 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
508 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
509 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
510 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
511 echo "obj-m := conftest.o" >build/Makefile
513 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
515 [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])],
517 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
523 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
525 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
526 [ZFS_LINUX_COMPILE_IFELSE(
527 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
529 [test -s build/conftest.o],
534 dnl # ZFS_LINUX_CONFIG
536 AC_DEFUN([ZFS_LINUX_CONFIG],
537 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
538 ZFS_LINUX_TRY_COMPILE([
539 #include <linux/module.h>
542 #error CONFIG_$1 not #defined
554 dnl # ZFS_CHECK_SYMBOL_EXPORT
555 dnl # check symbol exported or not
557 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
558 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
559 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
561 if test $rc -ne 0; then
564 grep -q -E "EXPORT_SYMBOL.*($1)" \
565 "$LINUX/$file" 2>/dev/null
567 if test $rc -eq 0; then
572 if test $export -eq 0; then :
583 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
584 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
585 dnl # is called if not compiling for builtin
587 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
588 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
589 if test $rc -ne 0; then :
592 if test "x$enable_linux_builtin" != xyes; then
593 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
595 if test $rc -ne 0; then :