X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=config%2Fkernel.m4;h=5490c8733648e94a28a7548f6ac7b33cd9d4f480;hb=8366cd6a83ab76885c89f57285e13428e4644ac0;hp=de557a18aa32ed325caba0e438be999ec18df807;hpb=f0e648ca02f55bb2c4bc328656769a0c529f683a;p=zfs.git

diff --git a/config/kernel.m4 b/config/kernel.m4
index de557a1..5490c87 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -1,63 +1,428 @@
 dnl #
-dnl # Default ZFS kernel mode configuration 
+dnl # Default ZFS kernel configuration 
+dnl #
+AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
+	ZFS_AC_KERNEL
+	ZFS_AC_SPL
+	ZFS_AC_KERNEL_CONFIG
+	ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
+	ZFS_AC_KERNEL_TYPE_FMODE_T
+	ZFS_AC_KERNEL_KOBJ_NAME_LEN
+	ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
+	ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
+	ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
+	ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
+	ZFS_AC_KERNEL_BIO_EMPTY_BARRIER
+	ZFS_AC_KERNEL_BIO_FAILFAST
+	ZFS_AC_KERNEL_BIO_FAILFAST_DTD
+	ZFS_AC_KERNEL_REQ_FAILFAST_MASK
+	ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
+	ZFS_AC_KERNEL_BIO_RW_SYNC
+	ZFS_AC_KERNEL_BIO_RW_SYNCIO
+	ZFS_AC_KERNEL_REQ_SYNC
+	ZFS_AC_KERNEL_BLK_END_REQUEST
+	ZFS_AC_KERNEL_BLK_FETCH_REQUEST
+	ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
+	ZFS_AC_KERNEL_BLK_RQ_BYTES
+	ZFS_AC_KERNEL_BLK_RQ_POS
+	ZFS_AC_KERNEL_BLK_RQ_SECTORS
+	ZFS_AC_KERNEL_GET_DISK_RO
+	ZFS_AC_KERNEL_RQ_IS_SYNC
+	ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT
+	ZFS_AC_KERNEL_CONST_XATTR_HANDLER
+	ZFS_AC_KERNEL_XATTR_HANDLER_GET
+	ZFS_AC_KERNEL_XATTR_HANDLER_SET
+	ZFS_AC_KERNEL_FSYNC_2ARGS
+	ZFS_AC_KERNEL_EVICT_INODE
+	ZFS_AC_KERNEL_INSERT_INODE_LOCKED
+	ZFS_AC_KERNEL_D_OBTAIN_ALIAS
+	ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
+	ZFS_AC_KERNEL_TRUNCATE_SETSIZE
+	ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
+	ZFS_AC_KERNEL_MOUNT_NODEV
+	ZFS_AC_KERNEL_BDI
+
+	AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
+		KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
+	])
+	AC_SUBST(KERNELMAKE_PARAMS)
+
+
+	dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
+	dnl # compiler options are added by the kernel build system.
+	KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
+
+	AC_SUBST(KERNELCPPFLAGS)
+])
+
+dnl #
+dnl # Detect name used for Module.symvers file in kernel
+dnl #
+AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
+	modpost=$LINUX/scripts/Makefile.modpost
+	AC_MSG_CHECKING([kernel file name for module symbols])
+	AS_IF([test -f "$modpost"], [
+		AS_IF([grep -q Modules.symvers $modpost], [
+			LINUX_SYMBOLS=Modules.symvers
+		], [
+			LINUX_SYMBOLS=Module.symvers
+		])
+
+		AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
+			AC_MSG_ERROR([
+	*** Please make sure the kernel devel package for your distribution
+	*** is installed.  If your building with a custom kernel make sure the
+	*** kernel is configured, built, and the '--with-linux=PATH' configure
+	*** option refers to the location of the kernel source.])
+		])
+	], [
+		LINUX_SYMBOLS=NONE
+	])
+	AC_MSG_RESULT($LINUX_SYMBOLS)
+	AC_SUBST(LINUX_SYMBOLS)
+])
+
+dnl #
+dnl # Detect the kernel to be built against
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL], [
+	AC_ARG_WITH([linux],
+		AS_HELP_STRING([--with-linux=PATH],
+		[Path to kernel source]),
+		[kernelsrc="$withval"])
+
+	AC_ARG_WITH(linux-obj,
+		AS_HELP_STRING([--with-linux-obj=PATH],
+		[Path to kernel build objects]),
+		[kernelbuild="$withval"])
+
+	AC_MSG_CHECKING([kernel source directory])
+	AS_IF([test -z "$kernelsrc"], [
+		AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
+			headersdir="/lib/modules/$(uname -r)/source"
+			sourcelink=$(readlink -f "$headersdir")
+		], [test -e "/lib/modules/$(uname -r)/build"], [
+			headersdir="/lib/modules/$(uname -r)/build"
+			sourcelink=$(readlink -f "$headersdir")
+		], [
+			sourcelink=$(ls -1d /usr/src/kernels/* \
+			             /usr/src/linux-* \
+			             2>/dev/null | grep -v obj | tail -1)
+		])
+
+		AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
+			kernelsrc=`readlink -f ${sourcelink}`
+		], [
+			AC_MSG_RESULT([Not found])
+			AC_MSG_ERROR([
+	*** Please make sure the kernel devel package for your distribution
+	*** is installed then try again.  If that fails you can specify the
+	*** location of the kernel source with the '--with-linux=PATH' option.])
+		])
+	], [
+		AS_IF([test "$kernelsrc" = "NONE"], [
+			kernsrcver=NONE
+		])
+	])
+
+	AC_MSG_RESULT([$kernelsrc])
+	AC_MSG_CHECKING([kernel build directory])
+	AS_IF([test -z "$kernelbuild"], [
+		AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
+			kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
+		], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
+			kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
+		], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
+		        kernelbuild=${kernelsrc}-obj/${target_cpu}/default
+		], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
+			kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
+		], [
+			kernelbuild=${kernelsrc}
+		])
+	])
+	AC_MSG_RESULT([$kernelbuild])
+
+	AC_MSG_CHECKING([kernel source version])
+	utsrelease1=$kernelbuild/include/linux/version.h
+	utsrelease2=$kernelbuild/include/linux/utsrelease.h
+	utsrelease3=$kernelbuild/include/generated/utsrelease.h
+	AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
+		utsrelease=linux/version.h
+	], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
+		utsrelease=linux/utsrelease.h
+	], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
+		utsrelease=generated/utsrelease.h
+	])
+
+	AS_IF([test "$utsrelease"], [
+		kernsrcver=`(echo "#include <$utsrelease>";
+		             echo "kernsrcver=UTS_RELEASE") |
+		             cpp -I $kernelbuild/include |
+		             grep "^kernsrcver=" | cut -d \" -f 2`
+
+		AS_IF([test -z "$kernsrcver"], [
+			AC_MSG_RESULT([Not found])
+			AC_MSG_ERROR([*** Cannot determine kernel version.])
+		])
+	], [
+		AC_MSG_RESULT([Not found])
+		AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
+	])
+
+	AC_MSG_RESULT([$kernsrcver])
+
+	LINUX=${kernelsrc}
+	LINUX_OBJ=${kernelbuild}
+	LINUX_VERSION=${kernsrcver}
+
+	AC_SUBST(LINUX)
+	AC_SUBST(LINUX_OBJ)
+	AC_SUBST(LINUX_VERSION)
+
+	ZFS_AC_MODULE_SYMVERS
+])
+
+dnl #
+dnl # Detect name used for the additional SPL Module.symvers file.  If one
+dnl # does not exist this is likely because the SPL has been configured
+dnl # but not built.  To allow recursive builds a good guess is made as to
+dnl # what this file will be named based on what it is named in the kernel
+dnl # build products.  This file will first be used at link time so if
+dnl # the guess is wrong the build will fail then.  This unfortunately
+dnl # means the ZFS package does not contain a reliable mechanism to
+dnl # detect symbols exported by the SPL at configure time.
+dnl #
+AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
+	AC_MSG_CHECKING([spl file name for module symbols])
+	AS_IF([test -r $SPL_OBJ/Module.symvers], [
+		SPL_SYMBOLS=Module.symvers
+	], [test -r $SPL_OBJ/Modules.symvers], [
+		SPL_SYMBOLS=Modules.symvers
+	], [test -r $SPL_OBJ/module/Module.symvers], [
+		SPL_SYMBOLS=Module.symvers
+	], [test -r $SPL_OBJ/module/Modules.symvers], [
+		SPL_SYMBOLS=Modules.symvers
+	], [
+		SPL_SYMBOLS=$LINUX_SYMBOLS
+	])
+
+	AC_MSG_RESULT([$SPL_SYMBOLS])
+	AC_SUBST(SPL_SYMBOLS)
+])
+
+dnl #
+dnl # Detect the SPL module to be built against
+dnl #
+AC_DEFUN([ZFS_AC_SPL], [
+	AC_ARG_WITH([spl],
+		AS_HELP_STRING([--with-spl=PATH],
+		[Path to spl source]),
+		[splsrc="$withval"])
+
+	AC_ARG_WITH([spl-obj],
+		AS_HELP_STRING([--with-spl-obj=PATH],
+		[Path to spl build objects]),
+		[splbuild="$withval"])
+
+
+	AC_MSG_CHECKING([spl source directory])
+	AS_IF([test -z "$splsrc"], [
+		sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
+		            2>/dev/null | tail -1`
+
+		AS_IF([test -z "$sourcelink" || test ! -e $sourcelink], [
+			sourcelink=../spl
+		])
+
+		AS_IF([test -e $sourcelink], [
+			splsrc=`readlink -f ${sourcelink}`
+		], [
+			AC_MSG_RESULT([Not found])
+			AC_MSG_ERROR([
+	*** Please make sure the spl devel package for your distribution
+	*** is installed then try again.  If that fails you can specify the
+	*** location of the spl source with the '--with-spl=PATH' option.])
+		])
+	], [
+		AS_IF([test "$splsrc" = "NONE"], [
+			splbuild=NONE
+			splsrcver=NONE
+		])
+	])
+
+	AC_MSG_RESULT([$splsrc])
+	AC_MSG_CHECKING([spl build directory])
+	AS_IF([test -z "$splbuild"], [
+		splbuild=${splsrc}
+	])
+	AC_MSG_RESULT([$splbuild])
+
+	AC_MSG_CHECKING([spl source version])
+	AS_IF([test -r $splbuild/spl_config.h &&
+		fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
+
+		splsrcver=`(echo "#include <spl_config.h>";
+		            echo "splsrcver=SPL_META_VERSION") |
+		            cpp -I $splbuild |
+		            grep "^splsrcver=" | cut -d \" -f 2`
+	])
+
+	AS_IF([test -z "$splsrcver"], [
+		AC_MSG_RESULT([Not found])
+		AC_MSG_ERROR([
+	*** Cannot determine the version of the spl source.
+	*** Please prepare the spl source before running this script])
+	])
+
+	AC_MSG_RESULT([$splsrcver])
+
+	SPL=${splsrc}
+	SPL_OBJ=${splbuild}
+	SPL_VERSION=${splsrcver}
+
+	AC_SUBST(SPL)
+	AC_SUBST(SPL_OBJ)
+	AC_SUBST(SPL_VERSION)
+
+	ZFS_AC_SPL_MODULE_SYMVERS
+])
+
+dnl #
+dnl # Certain kernel build options are not supported.  These must be
+dnl # detected at configure time and cause a build failure.  Otherwise
+dnl # modules may be successfully built that behave incorrectly.
+dnl #
+dnl # CONFIG_PREEMPT - Preempt kernels require special handling.
+dnl #
+dnl # There are certain kernel build options which when enabled are
+dnl # completely incompatible with non GPL kernel modules.  It is best
+dnl # to detect these at configure time and fail with a clear error
+dnl # rather than build everything and fail during linking.
+dnl #
+dnl # CONFIG_DEBUG_LOCK_ALLOC - Maps mutex_lock() to mutex_lock_nested()
 dnl #
 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
-	dnl # Kernel build make options
-	KERNELMAKE_PARAMS=
-	dnl #KERNELMAKE_PARAMS="V=1"	# Enable verbose module build
-
-	dnl # Kernel build cpp flags
-	KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL "
-	KERNELCPPFLAGS="$KERNELCPPFLAGS -I$splsrc -I$splsrc/include -I$TOPDIR"
-
-	dnl # Required for pread() functionality an other GNU goodness
-	HOSTCFLAGS="$HOSTCFLAGS -ggdb -O2 -std=c99 "
-	HOSTCFLAGS="$HOSTCFLAGS -D_GNU_SOURCE -D__EXTENSIONS__ "
-
-	dnl # XXX: Quiet warnings not covered by the gcc-* patches
-	dnl # XXX: Remove once all the warnings are resolved
-	HOSTCFLAGS="$HOSTCFLAGS -Wno-switch -Wno-unused -Wno-missing-braces "
-	HOSTCFLAGS="$HOSTCFLAGS -Wno-parentheses "
-	HOSTCFLAGS="$HOSTCFLAGS -Wno-uninitialized -fno-strict-aliasing "
-
-	dnl # Expected defines not covered by zfs_config.h or spl_config.h
-	HOSTCFLAGS="$HOSTCFLAGS -DHAVE_SPL -D_POSIX_PTHREAD_SEMANTICS "
-	HOSTCFLAGS="$HOSTCFLAGS -D_FILE_OFFSET_BITS=64 "
-	HOSTCFLAGS="$HOSTCFLAGS -D_LARGEFILE64_SOURCE -D_REENTRANT "
-	HOSTCFLAGS="$HOSTCFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\" "
-
-	dnl # Expected default include path
-	HOSTCFLAGS="$HOSTCFLAGS -I$TOPDIR "
-
-	if test "$kernelbuild" != "$kernelsrc"; then
-		KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$kernelbuild"
-	fi
-
-        AC_SUBST(KERNELMAKE_PARAMS)
-        AC_SUBST(KERNELCPPFLAGS)
-        AC_SUBST(HOSTCFLAGS)
-
-	dnl # XXX: I really, really hate this...  but to ensure the kernel
-	dnl # build system compiles C files shared between a library and a 
-	dnl # kernel module, we need to ensure each file has a unique make
-	dnl # target.  To do that I'm creating symlinks for each shared
-	dnl # file at configure time.  It may be possible something better
-	dnl # can be done in the Makefile but it will take some serious
-	dnl # investigation and I don't have the time now.
-
-	echo "Creating symlinks for additional make targets"
-	ln -f -s $LIBDIR/libport/u8_textprep.c      $LIBDIR/libport/ku8_textprep.c
-	ln -f -s $LIBDIR/libavl/avl.c               $LIBDIR/libavl/kavl.c
-	ln -f -s $LIBDIR/libavl/avl.c               $LIBDIR/libavl/uavl.c
-	ln -f -s $LIBDIR/libnvpair/nvpair.c         $LIBDIR/libnvpair/knvpair.c
-	ln -f -s $LIBDIR/libnvpair/nvpair.c         $LIBDIR/libnvpair/unvpair.c
-	ln -f -s $LIBDIR/libzcommon/zfs_deleg.c     $LIBDIR/libzcommon/kzfs_deleg.c
-	ln -f -s $LIBDIR/libzcommon/zfs_prop.c      $LIBDIR/libzcommon/kzfs_prop.c
-	ln -f -s $LIBDIR/libzcommon/zprop_common.c  $LIBDIR/libzcommon/kzprop_common.c
-	ln -f -s $LIBDIR/libzcommon/compress.c      $LIBDIR/libzcommon/kcompress.c
-	ln -f -s $LIBDIR/libzcommon/list.c          $LIBDIR/libzcommon/klist.c
-	ln -f -s $LIBDIR/libzcommon/zfs_namecheck.c $LIBDIR/libzcommon/kzfs_namecheck.c
-	ln -f -s $LIBDIR/libzcommon/zfs_comutil.c   $LIBDIR/libzcommon/kzfs_comutil.c
-	ln -f -s $LIBDIR/libzcommon/zpool_prop.c    $LIBDIR/libzcommon/kzpool_prop.c
-	]
-)
+
+	ZFS_LINUX_CONFIG([PREEMPT],
+		AC_MSG_ERROR([
+	*** Kernel built with CONFIG_PREEMPT which is not supported.
+	*** You must rebuild your kernel without this option.]), [])
+
+	AS_IF([test "$ZFS_META_LICENSE" = CDDL], [
+		ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC],
+		AC_MSG_ERROR([
+	*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is
+	*** incompatible with the CDDL license.  You must rebuild
+	*** your kernel without this option.]), [])
+	])
+
+	AS_IF([test "$ZFS_META_LICENSE" = GPL], [
+		AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
+			[Define to 1 if licensed under the GPL])
+	])
+])
+
+dnl #
+dnl # ZFS_LINUX_CONFTEST
+dnl #
+AC_DEFUN([ZFS_LINUX_CONFTEST], [
+cat confdefs.h - <<_ACEOF >conftest.c
+$1
+_ACEOF
+])
+
+dnl #
+dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
+dnl #
+m4_define([ZFS_LANG_PROGRAM], [
+$1
+int
+main (void)
+{
+dnl Do *not* indent the following line: there may be CPP directives.
+dnl Don't move the `;' right after for the same reason.
+$2
+  ;
+  return 0;
+}
+])
+
+dnl #
+dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
+dnl #
+AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
+	m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
+	rm -Rf build && mkdir -p build
+	echo "obj-m := conftest.o" >build/Makefile
+	AS_IF(
+		[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) >/dev/null && AC_TRY_COMMAND([$3])],
+		[$4],
+		[_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
+	)
+	rm -Rf build
+])
+
+dnl #
+dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
+dnl #
+AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
+	[ZFS_LINUX_COMPILE_IFELSE(
+	[AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
+	[modules],
+	[test -s build/conftest.o],
+	[$3], [$4])
+])
+
+dnl #
+dnl # ZFS_LINUX_CONFIG
+dnl #
+AC_DEFUN([ZFS_LINUX_CONFIG],
+	[AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
+	ZFS_LINUX_TRY_COMPILE([
+		#include <linux/module.h>
+	],[
+		#ifndef CONFIG_$1
+		#error CONFIG_$1 not #defined
+		#endif
+	],[
+		AC_MSG_RESULT([yes])
+		$2
+	],[
+		AC_MSG_RESULT([no])
+		$3
+	])
+])
+
+dnl #
+dnl # ZFS_CHECK_SYMBOL_EXPORT
+dnl # check symbol exported or not
+dnl #
+AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT],
+	[AC_MSG_CHECKING([whether symbol $1 is exported])
+	grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
+		$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+	rc=$?
+	AS_IF([test $rc -ne 0], [
+		export=0
+		for file in $2; do
+			grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
+			rc=$?
+			AS_IF([test $rc -eq 0], [
+				export=1
+				break;
+			])
+		done
+		AS_IF([test $export -eq 0], [
+			AC_MSG_RESULT([no])
+			$4
+		], [
+			AC_MSG_RESULT([yes])
+			$3
+		])
+	], [
+		AC_MSG_RESULT([yes])
+		$3
+	])
+])