AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL
ZFS_AC_SPL
+ ZFS_AC_TEST_MODULE
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_3ARG_BLKDEV_GET
ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
ZFS_AC_KERNEL_BLK_RQ_POS
ZFS_AC_KERNEL_BLK_RQ_SECTORS
ZFS_AC_KERNEL_GET_DISK_RO
+ ZFS_AC_KERNEL_GET_GENDISK
ZFS_AC_KERNEL_RQ_IS_SYNC
ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT
+ ZFS_AC_KERNEL_DISCARD_GRANULARITY
ZFS_AC_KERNEL_CONST_XATTR_HANDLER
ZFS_AC_KERNEL_XATTR_HANDLER_GET
ZFS_AC_KERNEL_XATTR_HANDLER_SET
ZFS_AC_KERNEL_NR_CACHED_OBJECTS
ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
ZFS_AC_KERNEL_FALLOCATE
+ ZFS_AC_KERNEL_TRUNCATE_RANGE
ZFS_AC_KERNEL_CREATE_UMODE_T
ZFS_AC_KERNEL_AUTOMOUNT
+ ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
+ ZFS_AC_KERNEL_CLEAR_INODE
ZFS_AC_KERNEL_INSERT_INODE_LOCKED
+ ZFS_AC_KERNEL_D_MAKE_ROOT
ZFS_AC_KERNEL_D_OBTAIN_ALIAS
ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
ZFS_AC_KERNEL_TRUNCATE_SETSIZE
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([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
AS_IF([grep -q Modules.symvers $modpost], [
LINUX_SYMBOLS=Modules.symvers
], [
], [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
+ kernelbuild=${kernelsrc}-obj/${target_cpu}/default
], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
], [
])
], [
AC_MSG_RESULT([Not found])
- AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
+ if test "x$enable_linux_builtin" != xyes; then
+ AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
+ else
+ AC_MSG_ERROR([
+ *** Cannot find UTS_RELEASE definition.
+ *** Please run 'make prepare' inside the kernel source tree.])
+ fi
])
AC_MSG_RESULT([$kernsrcver])
])
dnl #
+dnl # Basic toolchain sanity check.
+dnl #
+AC_DEFUN([ZFS_AC_TEST_MODULE],
+ [AC_MSG_CHECKING([whether modules can be built])
+ ZFS_LINUX_TRY_COMPILE([],[],[
+ AC_MSG_RESULT([yes])
+ ],[
+ AC_MSG_RESULT([no])
+ if test "x$enable_linux_builtin" != xyes; then
+ AC_MSG_ERROR([*** Unable to build an empty module.])
+ else
+ AC_MSG_ERROR([
+ *** Unable to build an empty module.
+ *** Please run 'make scripts' inside the kernel source tree.])
+ fi
+ ])
+])
+
+dnl #
dnl # Certain kernel build options are not supported. These must be
dnl # detected at configure time and cause a build failure. Otherwise
dnl # modules may be successfully built that behave incorrectly.
dnl #
-dnl # CONFIG_PREEMPT - Preempt kernels require special handling.
+AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
+
+ AS_IF([test "$ZFS_META_LICENSE" = GPL], [
+ AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
+ [Define to 1 if licensed under the GPL])
+ ])
+
+ ZFS_AC_KERNEL_CONFIG_PREEMPT
+ ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
+])
+
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 # Check CONFIG_PREEMPT
dnl #
-dnl # CONFIG_DEBUG_LOCK_ALLOC - Maps mutex_lock() to mutex_lock_nested()
+dnl # Premptible kernels will be supported in the future. But at the
+dnl # moment there are a few places in the code which need to be updated
+dnl # to accomidate them. Until that work occurs we should detect this
+dnl # at configure time and fail with a sensible message. Otherwise,
+dnl # people will be able to build successfully, however they will have
+dnl # stability problems. See https://github.com/zfsonlinux/zfs/issues/83
dnl #
-AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
+AC_DEFUN([ZFS_AC_KERNEL_CONFIG_PREEMPT], [
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 # Check CONFIG_DEBUG_LOCK_ALLOC
+dnl #
+dnl # This is typically only set for debug kernels because it comes with
+dnl # a performance penalty. However, when it is set it maps the non-GPL
+dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
+dnl # This will cause a failure at link time which we'd rather know about
+dnl # at compile time.
+dnl #
+dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
+dnl # with the upstream community we add a check to detect this case.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
+
+ ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
+ AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
+ tmp_flags="$EXTRA_KCFLAGS"
+ ZFS_LINUX_TRY_COMPILE([
+ #include <linux/module.h>
+ #include <linux/mutex.h>
+
+ MODULE_LICENSE("$ZFS_META_LICENSE");
+ ],[
+ struct mutex lock;
+
+ mutex_init(&lock);
+ mutex_lock(&lock);
+ mutex_unlock(&lock);
+ ],[
+ AC_MSG_RESULT(no)
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_MSG_ERROR([
+ *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
+ *** with the CDDL license and will prevent the module linking stage
+ *** from succeeding. You must rebuild your kernel without this
+ *** option enabled.])
+ ])
+ EXTRA_KCFLAGS="$tmp_flags"
+ ], [])
])
dnl #
dnl #
AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
- rm -Rf build && mkdir -p build
+ rm -Rf build && mkdir -p build && touch build/conftest.mod.c
echo "obj-m := conftest.o" >build/Makefile
+ modpost_flag=''
+ test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
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])],
+ [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])],
[$4],
[_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
)
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])
+AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
rc=$?
- AS_IF([test $rc -ne 0], [
+ if test $rc -ne 0; then
export=0
for file in $2; do
- grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
+ grep -q -E "EXPORT_SYMBOL.*($1)" \
+ "$LINUX/$file" 2>/dev/null
rc=$?
- AS_IF([test $rc -eq 0], [
+ if test $rc -eq 0; then
export=1
break;
- ])
+ fi
done
- AS_IF([test $export -eq 0], [
- AC_MSG_RESULT([no])
+ if test $export -eq 0; then :
$4
- ], [
- AC_MSG_RESULT([yes])
+ else :
$3
- ])
- ], [
- AC_MSG_RESULT([yes])
+ fi
+ else :
$3
- ])
+ fi
+])
+
+dnl #
+dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
+dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
+dnl # is called if not compiling for builtin
+dnl #
+AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
+ ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
+ if test $rc -ne 0; then :
+ $6
+ else
+ if test "x$enable_linux_builtin" != xyes; then
+ ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
+ fi
+ if test $rc -ne 0; then :
+ $6
+ else :
+ $5
+ fi
+ fi
])
git://git.camperquake.de / zfs.git / blobdiff