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
75 ZFS_AC_KERNEL_S_INSTANCES_LIST_HEAD
78 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
79 ZFS_AC_KERNEL_SET_NLINK
80 ZFS_AC_KERNEL_ELEVATOR_CHANGE
81 ZFS_AC_KERNEL_5ARG_SGET
82 ZFS_AC_KERNEL_LSEEK_EXECUTE
84 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
85 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
87 AC_SUBST(KERNELMAKE_PARAMS)
90 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
91 dnl # compiler options are added by the kernel build system.
92 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
93 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
94 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
96 AC_SUBST(KERNELCPPFLAGS)
100 dnl # Detect name used for Module.symvers file in kernel
102 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
103 modpost=$LINUX/scripts/Makefile.modpost
104 AC_MSG_CHECKING([kernel file name for module symbols])
105 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
106 AS_IF([grep -q Modules.symvers $modpost], [
107 LINUX_SYMBOLS=Modules.symvers
109 LINUX_SYMBOLS=Module.symvers
112 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
114 *** Please make sure the kernel devel package for your distribution
115 *** is installed. If you are building with a custom kernel, make sure the
116 *** kernel is configured, built, and the '--with-linux=PATH' configure
117 *** option refers to the location of the kernel source.])
122 AC_MSG_RESULT($LINUX_SYMBOLS)
123 AC_SUBST(LINUX_SYMBOLS)
127 dnl # Detect the kernel to be built against
129 AC_DEFUN([ZFS_AC_KERNEL], [
131 AS_HELP_STRING([--with-linux=PATH],
132 [Path to kernel source]),
133 [kernelsrc="$withval"])
135 AC_ARG_WITH(linux-obj,
136 AS_HELP_STRING([--with-linux-obj=PATH],
137 [Path to kernel build objects]),
138 [kernelbuild="$withval"])
140 AC_MSG_CHECKING([kernel source directory])
141 AS_IF([test -z "$kernelsrc"], [
142 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
143 headersdir="/lib/modules/$(uname -r)/source"
144 sourcelink=$(readlink -f "$headersdir")
145 ], [test -e "/lib/modules/$(uname -r)/build"], [
146 headersdir="/lib/modules/$(uname -r)/build"
147 sourcelink=$(readlink -f "$headersdir")
149 sourcelink=$(ls -1d /usr/src/kernels/* \
151 2>/dev/null | grep -v obj | tail -1)
154 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
155 kernelsrc=`readlink -f ${sourcelink}`
157 kernelsrc="[Not found]"
160 AS_IF([test "$kernelsrc" = "NONE"], [
165 AC_MSG_RESULT([$kernelsrc])
166 AS_IF([test ! -d "$kernelsrc"], [
168 *** Please make sure the kernel devel package for your distribution
169 *** is installed and then try again. If that fails, you can specify the
170 *** location of the kernel source with the '--with-linux=PATH' option.])
173 AC_MSG_CHECKING([kernel build directory])
174 AS_IF([test -z "$kernelbuild"], [
175 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
176 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
177 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
178 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
179 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
180 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
181 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
182 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
184 kernelbuild=${kernelsrc}
187 AC_MSG_RESULT([$kernelbuild])
189 AC_MSG_CHECKING([kernel source version])
190 utsrelease1=$kernelbuild/include/linux/version.h
191 utsrelease2=$kernelbuild/include/linux/utsrelease.h
192 utsrelease3=$kernelbuild/include/generated/utsrelease.h
193 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
194 utsrelease=linux/version.h
195 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
196 utsrelease=linux/utsrelease.h
197 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
198 utsrelease=generated/utsrelease.h
201 AS_IF([test "$utsrelease"], [
202 kernsrcver=`(echo "#include <$utsrelease>";
203 echo "kernsrcver=UTS_RELEASE") |
204 cpp -I $kernelbuild/include |
205 grep "^kernsrcver=" | cut -d \" -f 2`
207 AS_IF([test -z "$kernsrcver"], [
208 AC_MSG_RESULT([Not found])
209 AC_MSG_ERROR([*** Cannot determine kernel version.])
212 AC_MSG_RESULT([Not found])
213 if test "x$enable_linux_builtin" != xyes; then
214 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
217 *** Cannot find UTS_RELEASE definition.
218 *** Please run 'make prepare' inside the kernel source tree.])
222 AC_MSG_RESULT([$kernsrcver])
225 LINUX_OBJ=${kernelbuild}
226 LINUX_VERSION=${kernsrcver}
230 AC_SUBST(LINUX_VERSION)
232 ZFS_AC_MODULE_SYMVERS
237 dnl # Detect the SPL module to be built against
239 AC_DEFUN([ZFS_AC_SPL], [
241 AS_HELP_STRING([--with-spl=PATH],
242 [Path to spl source]),
245 AC_ARG_WITH([spl-obj],
246 AS_HELP_STRING([--with-spl-obj=PATH],
247 [Path to spl build objects]),
248 [splbuild="$withval"])
250 AC_ARG_WITH([spl-timeout],
251 AS_HELP_STRING([--with-spl-timeout=SECS],
252 [Wait SECS for SPL header and symver file @<:@default=0@:>@]),
253 [timeout="$withval"], [timeout=0])
256 dnl # The existence of spl.release.in is used to identify a valid
257 dnl # source directory. In order of preference:
259 splsrc0="/var/lib/dkms/spl/${VERSION}/build"
260 splsrc1="/usr/src/spl-${VERSION}/${LINUX_VERSION}"
261 splsrc2="/usr/src/spl-${VERSION}"
265 AC_MSG_CHECKING([spl source directory])
266 AS_IF([test -z "${splsrc}"], [
267 AS_IF([ test -e "${splsrc0}/spl.release.in"], [
269 ], [ test -e "${splsrc1}/spl.release.in"], [
271 ], [ test -e "${splsrc2}/spl.release.in"], [
273 ], [ test -e "${splsrc3}/spl.release.in"], [
274 splsrc=$(readlink -f "${splsrc3}")
275 ], [ test -e "${splsrc4}/spl.release.in" ], [
281 AS_IF([test "$splsrc" = "NONE"], [
287 AC_MSG_RESULT([$splsrc])
288 AS_IF([ test ! -e "$splsrc/spl.release.in"], [
290 *** Please make sure the kmod spl devel package for your distribution
291 *** is installed then try again. If that fails you can specify the
292 *** location of the spl source with the '--with-spl=PATH' option.])
296 dnl # The existence of the spl_config.h is used to identify a valid
297 dnl # spl object directory. In many cases the object and source
298 dnl # directory are the same, however the objects may also reside
299 dnl # is a subdirectory named after the kernel version.
301 dnl # This file is supposed to be available after DKMS finishes
302 dnl # building the SPL kernel module for the target kernel. The
303 dnl # '--with-spl-timeout' option can be passed to pause here,
304 dnl # waiting for the file to appear from a concurrently building
307 AC_MSG_CHECKING([spl build directory])
309 AS_IF([test -z "$splbuild"], [
310 AS_IF([ test -e "${splsrc}/${LINUX_VERSION}/spl_config.h" ], [
311 splbuild="${splsrc}/${LINUX_VERSION}"
312 ], [ test -e "${splsrc}/spl_config.h" ], [
315 splbuild="[Not found]"
318 AS_IF([test -e "$splbuild/spl_config.h" -o $timeout -le 0], [
322 timeout=$((timeout-1))
326 AC_MSG_RESULT([$splbuild])
327 AS_IF([ ! test -e "$splbuild/spl_config.h"], [
329 *** Please make sure the kmod spl devel <kernel> package for your
330 *** distribution is installed then try again. If that fails you
331 *** can specify the location of the spl objects with the
332 *** '--with-spl-obj=PATH' option.])
335 AC_MSG_CHECKING([spl source version])
336 AS_IF([test -r $splbuild/spl_config.h &&
337 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
339 splsrcver=`(echo "#include <spl_config.h>";
340 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
342 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
345 AS_IF([test -z "$splsrcver"], [
346 AC_MSG_RESULT([Not found])
348 *** Cannot determine the version of the spl source.
349 *** Please prepare the spl source before running this script])
352 AC_MSG_RESULT([$splsrcver])
356 SPL_VERSION=${splsrcver}
360 AC_SUBST(SPL_VERSION)
363 dnl # Detect the name used for the SPL Module.symvers file. If one
364 dnl # does not exist this is likely because the SPL has been configured
365 dnl # but not built. The '--with-spl-timeout' option can be passed
366 dnl # to pause here, waiting for the file to appear from a concurrently
367 dnl # building SPL package. If the file does not appear in time, a good
368 dnl # guess is made as to what this file will be named based on what it
369 dnl # is named in the kernel build products. This file will first be
370 dnl # used at link time so if the guess is wrong the build will fail
371 dnl # then. This unfortunately means the ZFS package does not contain a
372 dnl # reliable mechanism to detect symbols exported by the SPL at
373 dnl # configure time.
375 AC_MSG_CHECKING([spl file name for module symbols])
379 AS_IF([test -r $SPL_OBJ/Module.symvers], [
380 SPL_SYMBOLS=Module.symvers
381 ], [test -r $SPL_OBJ/Modules.symvers], [
382 SPL_SYMBOLS=Modules.symvers
383 ], [test -r $SPL_OBJ/module/Module.symvers], [
384 SPL_SYMBOLS=Module.symvers
385 ], [test -r $SPL_OBJ/module/Modules.symvers], [
386 SPL_SYMBOLS=Modules.symvers
389 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
393 timeout=$((timeout-1))
397 AS_IF([test "$SPL_SYMBOLS" = NONE], [
398 SPL_SYMBOLS=$LINUX_SYMBOLS
401 AC_MSG_RESULT([$SPL_SYMBOLS])
402 AC_SUBST(SPL_SYMBOLS)
406 dnl # Basic toolchain sanity check.
408 AC_DEFUN([ZFS_AC_TEST_MODULE],
409 [AC_MSG_CHECKING([whether modules can be built])
410 ZFS_LINUX_TRY_COMPILE([],[],[
414 if test "x$enable_linux_builtin" != xyes; then
415 AC_MSG_ERROR([*** Unable to build an empty module.])
418 *** Unable to build an empty module.
419 *** Please run 'make scripts' inside the kernel source tree.])
425 dnl # Certain kernel build options are not supported. These must be
426 dnl # detected at configure time and cause a build failure. Otherwise
427 dnl # modules may be successfully built that behave incorrectly.
429 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
431 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
432 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
433 [Define to 1 if licensed under the GPL])
436 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
440 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
442 dnl # This is typically only set for debug kernels because it comes with
443 dnl # a performance penalty. However, when it is set it maps the non-GPL
444 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
445 dnl # This will cause a failure at link time which we'd rather know about
446 dnl # at compile time.
448 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
449 dnl # with the upstream community we add a check to detect this case.
451 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
453 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
454 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
455 tmp_flags="$EXTRA_KCFLAGS"
456 ZFS_LINUX_TRY_COMPILE([
457 #include <linux/module.h>
458 #include <linux/mutex.h>
460 MODULE_LICENSE("$ZFS_META_LICENSE");
472 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
473 *** with the CDDL license and will prevent the module linking stage
474 *** from succeeding. You must rebuild your kernel without this
475 *** option enabled.])
477 EXTRA_KCFLAGS="$tmp_flags"
482 dnl # ZFS_LINUX_CONFTEST
484 AC_DEFUN([ZFS_LINUX_CONFTEST], [
485 cat confdefs.h - <<_ACEOF >conftest.c
491 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
493 m4_define([ZFS_LANG_PROGRAM], [
498 dnl Do *not* indent the following line: there may be CPP directives.
499 dnl Don't move the `;' right after for the same reason.
507 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
509 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
510 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
511 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
512 echo "obj-m := conftest.o" >build/Makefile
514 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
516 [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])],
518 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
524 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
526 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
527 [ZFS_LINUX_COMPILE_IFELSE(
528 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
530 [test -s build/conftest.o],
535 dnl # ZFS_LINUX_CONFIG
537 AC_DEFUN([ZFS_LINUX_CONFIG],
538 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
539 ZFS_LINUX_TRY_COMPILE([
540 #include <linux/module.h>
543 #error CONFIG_$1 not #defined
555 dnl # ZFS_CHECK_SYMBOL_EXPORT
556 dnl # check symbol exported or not
558 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
559 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
560 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
562 if test $rc -ne 0; then
565 grep -q -E "EXPORT_SYMBOL.*($1)" \
566 "$LINUX/$file" 2>/dev/null
568 if test $rc -eq 0; then
573 if test $export -eq 0; then :
584 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
585 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
586 dnl # is called if not compiling for builtin
588 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
589 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
590 if test $rc -ne 0; then :
593 if test "x$enable_linux_builtin" != xyes; then
594 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
596 if test $rc -ne 0; then :