1577 lines
40 KiB
Plaintext
1577 lines
40 KiB
Plaintext
###############################################################################
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# Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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# Copyright (C) 2007 The Regents of the University of California.
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# Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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###############################################################################
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# SPL_AC_CONFIG_KERNEL: Default SPL kernel configuration.
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###############################################################################
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AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
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SPL_AC_KERNEL
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if test "${LINUX_OBJ}" != "${LINUX}"; then
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KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
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fi
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AC_SUBST(KERNELMAKE_PARAMS)
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KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
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AC_SUBST(KERNELCPPFLAGS)
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SPL_AC_DEBUG
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SPL_AC_DEBUG_KMEM
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SPL_AC_DEBUG_KMEM_TRACKING
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SPL_AC_TEST_MODULE
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SPL_AC_ATOMIC_SPINLOCK
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SPL_AC_SHRINKER_CALLBACK
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SPL_AC_CTL_NAME
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SPL_AC_CONFIG_TRIM_UNUSED_KSYMS
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SPL_AC_PDE_DATA
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SPL_AC_SET_FS_PWD_WITH_CONST
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SPL_AC_2ARGS_VFS_UNLINK
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SPL_AC_4ARGS_VFS_RENAME
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SPL_AC_2ARGS_VFS_FSYNC
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SPL_AC_INODE_TRUNCATE_RANGE
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SPL_AC_FS_STRUCT_SPINLOCK
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SPL_AC_KUIDGID_T
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SPL_AC_PUT_TASK_STRUCT
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SPL_AC_KERNEL_FALLOCATE
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SPL_AC_CONFIG_ZLIB_INFLATE
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SPL_AC_CONFIG_ZLIB_DEFLATE
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SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
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SPL_AC_SHRINK_CONTROL_STRUCT
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SPL_AC_RWSEM_SPINLOCK_IS_RAW
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SPL_AC_RWSEM_ACTIVITY
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SPL_AC_RWSEM_ATOMIC_LONG_COUNT
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SPL_AC_SCHED_RT_HEADER
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SPL_AC_2ARGS_VFS_GETATTR
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SPL_AC_USLEEP_RANGE
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SPL_AC_KMEM_CACHE_ALLOCFLAGS
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SPL_AC_WAIT_ON_BIT
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SPL_AC_MUTEX_OWNER
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SPL_AC_INODE_LOCK
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])
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AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
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modpost=$LINUX/scripts/Makefile.modpost
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AC_MSG_CHECKING([kernel file name for module symbols])
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if test "x$enable_linux_builtin" != xyes -a -f "$modpost"; then
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if grep -q Modules.symvers $modpost; then
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LINUX_SYMBOLS=Modules.symvers
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else
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LINUX_SYMBOLS=Module.symvers
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fi
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if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
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AC_MSG_ERROR([
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*** Please make sure the kernel devel package for your distribution
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*** is installed. If you are building with a custom kernel, make sure the
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*** kernel is configured, built, and the '--with-linux=PATH' configure
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*** option refers to the location of the kernel source.])
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fi
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else
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LINUX_SYMBOLS=NONE
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fi
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AC_MSG_RESULT($LINUX_SYMBOLS)
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AC_SUBST(LINUX_SYMBOLS)
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])
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AC_DEFUN([SPL_AC_KERNEL], [
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AC_ARG_WITH([linux],
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AS_HELP_STRING([--with-linux=PATH],
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[Path to kernel source]),
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[kernelsrc="$withval"])
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AC_ARG_WITH([linux-obj],
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AS_HELP_STRING([--with-linux-obj=PATH],
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[Path to kernel build objects]),
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[kernelbuild="$withval"])
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AC_MSG_CHECKING([kernel source directory])
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if test -z "$kernelsrc"; then
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if test -e "/lib/modules/$(uname -r)/source"; then
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headersdir="/lib/modules/$(uname -r)/source"
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sourcelink=$(readlink -f "$headersdir")
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elif test -e "/lib/modules/$(uname -r)/build"; then
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headersdir="/lib/modules/$(uname -r)/build"
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sourcelink=$(readlink -f "$headersdir")
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else
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sourcelink=$(ls -1d /usr/src/kernels/* \
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/usr/src/linux-* \
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2>/dev/null | grep -v obj | tail -1)
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fi
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if test -n "$sourcelink" && test -e ${sourcelink}; then
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kernelsrc=`readlink -f ${sourcelink}`
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else
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kernelsrc="[Not found]"
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fi
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else
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if test "$kernelsrc" = "NONE"; then
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kernsrcver=NONE
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fi
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fi
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AC_MSG_RESULT([$kernelsrc])
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if test ! -d "$kernelsrc"; then
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AC_MSG_ERROR([
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*** Please make sure the kernel devel package for your distribution
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*** is installed and then try again. If that fails, you can specify the
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*** location of the kernel source with the '--with-linux=PATH' option.])
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fi
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AC_MSG_CHECKING([kernel build directory])
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if test -z "$kernelbuild"; then
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if test -e "/lib/modules/$(uname -r)/build"; then
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kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
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elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
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kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
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elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
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kernelbuild=${kernelsrc}-obj/${target_cpu}/default
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elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
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kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
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else
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kernelbuild=${kernelsrc}
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fi
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fi
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AC_MSG_RESULT([$kernelbuild])
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AC_MSG_CHECKING([kernel source version])
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utsrelease1=$kernelbuild/include/linux/version.h
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utsrelease2=$kernelbuild/include/linux/utsrelease.h
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utsrelease3=$kernelbuild/include/generated/utsrelease.h
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if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
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utsrelease=linux/version.h
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elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
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utsrelease=linux/utsrelease.h
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elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
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utsrelease=generated/utsrelease.h
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fi
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if test "$utsrelease"; then
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kernsrcver=`(echo "#include <$utsrelease>";
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echo "kernsrcver=UTS_RELEASE") |
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cpp -I $kernelbuild/include |
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grep "^kernsrcver=" | cut -d \" -f 2`
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if test -z "$kernsrcver"; then
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AC_MSG_RESULT([Not found])
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AC_MSG_ERROR([*** Cannot determine kernel version.])
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fi
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else
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AC_MSG_RESULT([Not found])
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if test "x$enable_linux_builtin" != xyes; then
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AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
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else
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AC_MSG_ERROR([
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*** Cannot find UTS_RELEASE definition.
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*** Please run 'make prepare' inside the kernel source tree.])
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fi
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fi
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AC_MSG_RESULT([$kernsrcver])
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LINUX=${kernelsrc}
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LINUX_OBJ=${kernelbuild}
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LINUX_VERSION=${kernsrcver}
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AC_SUBST(LINUX)
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AC_SUBST(LINUX_OBJ)
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AC_SUBST(LINUX_VERSION)
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SPL_AC_MODULE_SYMVERS
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])
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dnl #
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dnl # Default SPL user configuration
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dnl #
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AC_DEFUN([SPL_AC_CONFIG_USER], [])
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dnl #
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dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
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dnl # are missing, it is non-fatal, but you will not be able to build
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dnl # RPM packages and will be warned if you try too.
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dnl #
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dnl # By default, the generic spec file will be used because it requires
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dnl # minimal dependencies. Distribution specific spec files can be
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dnl # placed under the 'rpm/<distribution>' directory and enabled using
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dnl # the --with-spec=<distribution> configure option.
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dnl #
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AC_DEFUN([SPL_AC_RPM], [
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RPM=rpm
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RPMBUILD=rpmbuild
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AC_MSG_CHECKING([whether $RPM is available])
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AS_IF([tmp=$($RPM --version 2>/dev/null)], [
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RPM_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
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HAVE_RPM=yes
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AC_MSG_RESULT([$HAVE_RPM ($RPM_VERSION)])
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],[
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HAVE_RPM=no
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AC_MSG_RESULT([$HAVE_RPM])
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])
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AC_MSG_CHECKING([whether $RPMBUILD is available])
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AS_IF([tmp=$($RPMBUILD --version 2>/dev/null)], [
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RPMBUILD_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
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HAVE_RPMBUILD=yes
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AC_MSG_RESULT([$HAVE_RPMBUILD ($RPMBUILD_VERSION)])
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],[
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HAVE_RPMBUILD=no
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AC_MSG_RESULT([$HAVE_RPMBUILD])
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])
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RPM_DEFINE_COMMON='--define "$(DEBUG_SPL) 1" --define "$(DEBUG_KMEM) 1" --define "$(DEBUG_KMEM_TRACKING) 1"'
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RPM_DEFINE_UTIL=
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RPM_DEFINE_KMOD='--define "kernels $(LINUX_VERSION)"'
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RPM_DEFINE_DKMS=
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SRPM_DEFINE_COMMON='--define "build_src_rpm 1"'
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SRPM_DEFINE_UTIL=
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SRPM_DEFINE_KMOD=
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SRPM_DEFINE_DKMS=
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RPM_SPEC_DIR="rpm/generic"
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AC_ARG_WITH([spec],
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AS_HELP_STRING([--with-spec=SPEC],
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[Spec files 'generic|redhat']),
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[RPM_SPEC_DIR="rpm/$withval"])
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AC_MSG_CHECKING([whether spec files are available])
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AC_MSG_RESULT([yes ($RPM_SPEC_DIR/*.spec.in)])
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AC_SUBST(HAVE_RPM)
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AC_SUBST(RPM)
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AC_SUBST(RPM_VERSION)
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AC_SUBST(HAVE_RPMBUILD)
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AC_SUBST(RPMBUILD)
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AC_SUBST(RPMBUILD_VERSION)
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AC_SUBST(RPM_SPEC_DIR)
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AC_SUBST(RPM_DEFINE_UTIL)
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AC_SUBST(RPM_DEFINE_KMOD)
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AC_SUBST(RPM_DEFINE_DKMS)
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AC_SUBST(RPM_DEFINE_COMMON)
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AC_SUBST(SRPM_DEFINE_UTIL)
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AC_SUBST(SRPM_DEFINE_KMOD)
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AC_SUBST(SRPM_DEFINE_DKMS)
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AC_SUBST(SRPM_DEFINE_COMMON)
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])
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dnl #
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dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
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dnl # tools are missing it is non-fatal but you will not be able to build
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dnl # DEB packages and will be warned if you try too.
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dnl #
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AC_DEFUN([SPL_AC_DPKG], [
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DPKG=dpkg
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DPKGBUILD=dpkg-buildpackage
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AC_MSG_CHECKING([whether $DPKG is available])
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AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
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DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
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HAVE_DPKG=yes
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AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
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],[
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HAVE_DPKG=no
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AC_MSG_RESULT([$HAVE_DPKG])
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])
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AC_MSG_CHECKING([whether $DPKGBUILD is available])
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AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
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DPKGBUILD_VERSION=$(echo $tmp | \
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$AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
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HAVE_DPKGBUILD=yes
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AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
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],[
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HAVE_DPKGBUILD=no
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AC_MSG_RESULT([$HAVE_DPKGBUILD])
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])
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AC_SUBST(HAVE_DPKG)
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AC_SUBST(DPKG)
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AC_SUBST(DPKG_VERSION)
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AC_SUBST(HAVE_DPKGBUILD)
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AC_SUBST(DPKGBUILD)
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AC_SUBST(DPKGBUILD_VERSION)
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])
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dnl #
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dnl # Until native packaging for various different packing systems
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dnl # can be added the least we can do is attempt to use alien to
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dnl # convert the RPM packages to the needed package type. This is
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dnl # a hack but so far it has worked reasonable well.
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dnl #
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AC_DEFUN([SPL_AC_ALIEN], [
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ALIEN=alien
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AC_MSG_CHECKING([whether $ALIEN is available])
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AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
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ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
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HAVE_ALIEN=yes
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AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
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],[
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HAVE_ALIEN=no
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AC_MSG_RESULT([$HAVE_ALIEN])
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])
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AC_SUBST(HAVE_ALIEN)
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AC_SUBST(ALIEN)
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AC_SUBST(ALIEN_VERSION)
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])
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dnl #
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dnl # Using the VENDOR tag from config.guess set the default
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dnl # package type for 'make pkg': (rpm | deb | tgz)
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dnl #
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AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
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AC_MSG_CHECKING([linux distribution])
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if test -f /etc/toss-release ; then
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VENDOR=toss ;
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elif test -f /etc/fedora-release ; then
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VENDOR=fedora ;
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elif test -f /etc/redhat-release ; then
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VENDOR=redhat ;
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elif test -f /etc/gentoo-release ; then
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VENDOR=gentoo ;
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elif test -f /etc/arch-release ; then
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VENDOR=arch ;
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elif test -f /etc/SuSE-release ; then
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VENDOR=sles ;
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elif test -f /etc/slackware-version ; then
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VENDOR=slackware ;
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elif test -f /etc/lunar.release ; then
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VENDOR=lunar ;
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elif test -f /etc/lsb-release ; then
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VENDOR=ubuntu ;
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elif test -f /etc/debian_version ; then
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VENDOR=debian ;
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else
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VENDOR= ;
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fi
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AC_MSG_RESULT([$VENDOR])
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AC_SUBST(VENDOR)
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AC_MSG_CHECKING([default package type])
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case "$VENDOR" in
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toss) DEFAULT_PACKAGE=rpm ;;
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redhat) DEFAULT_PACKAGE=rpm ;;
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fedora) DEFAULT_PACKAGE=rpm ;;
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gentoo) DEFAULT_PACKAGE=tgz ;;
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arch) DEFAULT_PACKAGE=tgz ;;
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sles) DEFAULT_PACKAGE=rpm ;;
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slackware) DEFAULT_PACKAGE=tgz ;;
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lunar) DEFAULT_PACKAGE=tgz ;;
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ubuntu) DEFAULT_PACKAGE=deb ;;
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debian) DEFAULT_PACKAGE=deb ;;
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*) DEFAULT_PACKAGE=rpm ;;
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esac
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AC_MSG_RESULT([$DEFAULT_PACKAGE])
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AC_SUBST(DEFAULT_PACKAGE)
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])
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dnl #
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dnl # Default SPL user configuration
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dnl #
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AC_DEFUN([SPL_AC_PACKAGE], [
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SPL_AC_DEFAULT_PACKAGE
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SPL_AC_RPM
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SPL_AC_DPKG
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SPL_AC_ALIEN
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])
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AC_DEFUN([SPL_AC_LICENSE], [
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AC_MSG_CHECKING([spl author])
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AC_MSG_RESULT([$SPL_META_AUTHOR])
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AC_MSG_CHECKING([spl license])
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AC_MSG_RESULT([$SPL_META_LICENSE])
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])
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AC_DEFUN([SPL_AC_CONFIG], [
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SPL_CONFIG=all
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AC_ARG_WITH([config],
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AS_HELP_STRING([--with-config=CONFIG],
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[Config file 'kernel|user|all|srpm']),
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[SPL_CONFIG="$withval"])
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AC_ARG_ENABLE([linux-builtin],
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[AC_HELP_STRING([--enable-linux-builtin],
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[Configure for builtin in-tree kernel modules @<:@default=no@:>@])],
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[],
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[enable_linux_builtin=no])
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AC_MSG_CHECKING([spl config])
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AC_MSG_RESULT([$SPL_CONFIG]);
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AC_SUBST(SPL_CONFIG)
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case "$SPL_CONFIG" in
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kernel) SPL_AC_CONFIG_KERNEL ;;
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user) SPL_AC_CONFIG_USER ;;
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all) SPL_AC_CONFIG_KERNEL
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SPL_AC_CONFIG_USER ;;
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srpm) ;;
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*)
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AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
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user kernel|user|all|srpm]) ;;
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esac
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AM_CONDITIONAL([CONFIG_USER],
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[test "$SPL_CONFIG" = user -o "$SPL_CONFIG" = all])
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AM_CONDITIONAL([CONFIG_KERNEL],
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[test "$SPL_CONFIG" = kernel -o "$SPL_CONFIG" = all] &&
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[test "x$enable_linux_builtin" != xyes ])
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])
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dnl #
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dnl # Enable if the SPL should be compiled with internal debugging enabled.
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dnl # By default this support is disabled.
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dnl #
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AC_DEFUN([SPL_AC_DEBUG], [
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AC_MSG_CHECKING([whether debugging is enabled])
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AC_ARG_ENABLE([debug],
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[AS_HELP_STRING([--enable-debug],
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[Enable generic debug support @<:@default=no@:>@])],
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[],
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[enable_debug=no])
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AS_IF([test "x$enable_debug" = xyes],
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[
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
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DEBUG_CFLAGS="-DDEBUG -Werror"
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DEBUG_SPL="_with_debug"
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], [
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
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DEBUG_CFLAGS="-DNDEBUG"
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DEBUG_SPL="_without_debug"
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])
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AC_SUBST(DEBUG_CFLAGS)
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AC_SUBST(DEBUG_SPL)
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AC_MSG_RESULT([$enable_debug])
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])
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|
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dnl #
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dnl # Enabled by default it provides a minimal level of memory tracking.
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dnl # A total count of bytes allocated is kept for each alloc and free.
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dnl # Then at module unload time a report to the console will be printed
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dnl # if memory was leaked.
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dnl #
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AC_DEFUN([SPL_AC_DEBUG_KMEM], [
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AC_ARG_ENABLE([debug-kmem],
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[AS_HELP_STRING([--enable-debug-kmem],
|
|
[Enable basic kmem accounting @<:@default=no@:>@])],
|
|
[],
|
|
[enable_debug_kmem=no])
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|
|
AS_IF([test "x$enable_debug_kmem" = xyes],
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[
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
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DEBUG_KMEM="_with_debug_kmem"
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|
AC_DEFINE([DEBUG_KMEM], [1],
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|
[Define to 1 to enable basic kmem accounting])
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|
], [
|
|
DEBUG_KMEM="_without_debug_kmem"
|
|
])
|
|
|
|
AC_SUBST(DEBUG_KMEM)
|
|
AC_MSG_CHECKING([whether basic kmem accounting is enabled])
|
|
AC_MSG_RESULT([$enable_debug_kmem])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Disabled by default it provides detailed memory tracking. This
|
|
dnl # feature also requires --enable-debug-kmem to be set. When enabled
|
|
dnl # not only will total bytes be tracked but also the location of every
|
|
dnl # alloc and free. When the SPL module is unloaded a list of all leaked
|
|
dnl # addresses and where they were allocated will be dumped to the console.
|
|
dnl # Enabling this feature has a significant impact on performance but it
|
|
dnl # makes finding memory leaks pretty straight forward.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
|
|
AC_ARG_ENABLE([debug-kmem-tracking],
|
|
[AS_HELP_STRING([--enable-debug-kmem-tracking],
|
|
[Enable detailed kmem tracking @<:@default=no@:>@])],
|
|
[],
|
|
[enable_debug_kmem_tracking=no])
|
|
|
|
AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
|
|
[
|
|
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"
|
|
DEBUG_KMEM_TRACKING="_with_debug_kmem_tracking"
|
|
AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
|
|
[Define to 1 to enable detailed kmem tracking])
|
|
], [
|
|
DEBUG_KMEM_TRACKING="_without_debug_kmem_tracking"
|
|
])
|
|
|
|
AC_SUBST(DEBUG_KMEM_TRACKING)
|
|
AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
|
|
AC_MSG_RESULT([$enable_debug_kmem_tracking])
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_LINUX_CONFTEST
|
|
dnl #
|
|
AC_DEFUN([SPL_LINUX_CONFTEST], [
|
|
cat confdefs.h - <<_ACEOF >conftest.c
|
|
$1
|
|
_ACEOF
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
|
|
dnl #
|
|
m4_define([SPL_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 # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
|
|
dnl #
|
|
AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
|
|
m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
|
|
rm -Rf build && mkdir -p build && touch build/conftest.mod.c
|
|
echo "obj-m := conftest.o" >build/Makefile
|
|
modpost_flag=''
|
|
test "x$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 $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
|
|
[$4],
|
|
[_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
|
|
)
|
|
rm -Rf build
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
|
|
dnl #
|
|
AC_DEFUN([SPL_LINUX_TRY_COMPILE],
|
|
[SPL_LINUX_COMPILE_IFELSE(
|
|
[AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
|
|
[modules],
|
|
[test -s build/conftest.o],
|
|
[$3], [$4])
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_CHECK_SYMBOL_EXPORT
|
|
dnl # check symbol exported or not
|
|
dnl #
|
|
AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT], [
|
|
grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
|
|
$LINUX_OBJ/Module*.symvers 2>/dev/null
|
|
rc=$?
|
|
if test $rc -ne 0; then
|
|
export=0
|
|
for file in $2; do
|
|
grep -q -E "EXPORT_SYMBOL.*($1)" \
|
|
"$LINUX_OBJ/$file" 2>/dev/null
|
|
rc=$?
|
|
if test $rc -eq 0; then
|
|
export=1
|
|
break;
|
|
fi
|
|
done
|
|
if test $export -eq 0; then :
|
|
$4
|
|
else :
|
|
$3
|
|
fi
|
|
else :
|
|
$3
|
|
fi
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_LINUX_TRY_COMPILE_SYMBOL
|
|
dnl # like SPL_LINUX_TRY_COMPILE, except SPL_CHECK_SYMBOL_EXPORT
|
|
dnl # is called if not compiling for builtin
|
|
dnl #
|
|
AC_DEFUN([SPL_LINUX_TRY_COMPILE_SYMBOL], [
|
|
SPL_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
|
|
SPL_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
|
|
fi
|
|
if test $rc -ne 0; then :
|
|
$6
|
|
else :
|
|
$5
|
|
fi
|
|
fi
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_CHECK_SYMBOL_HEADER
|
|
dnl # check if a symbol prototype is defined in listed headers.
|
|
dnl #
|
|
AC_DEFUN([SPL_CHECK_SYMBOL_HEADER], [
|
|
AC_MSG_CHECKING([whether symbol $1 exists in header])
|
|
header=0
|
|
for file in $3; do
|
|
grep -q "$2" "$LINUX/$file" 2>/dev/null
|
|
rc=$?
|
|
if test $rc -eq 0; then
|
|
header=1
|
|
break;
|
|
fi
|
|
done
|
|
if test $header -eq 0; then
|
|
AC_MSG_RESULT([no])
|
|
$5
|
|
else
|
|
AC_MSG_RESULT([yes])
|
|
$4
|
|
fi
|
|
])
|
|
|
|
dnl #
|
|
dnl # SPL_CHECK_HEADER
|
|
dnl # check whether header exists and define HAVE_$2_HEADER
|
|
dnl #
|
|
AC_DEFUN([SPL_CHECK_HEADER],
|
|
[AC_MSG_CHECKING([whether header $1 exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <$1>
|
|
],[
|
|
return 0;
|
|
],[
|
|
AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
|
|
AC_MSG_RESULT(yes)
|
|
$3
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
$4
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Basic toolchain sanity check. Verify that kernel modules can
|
|
dnl # be built and which symbols can be used.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_TEST_MODULE],
|
|
[AC_MSG_CHECKING([whether modules can be built])
|
|
SPL_LINUX_TRY_COMPILE([],[],[
|
|
AC_MSG_RESULT([yes])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
if test "x$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
|
|
])
|
|
|
|
AS_IF([test "x$cross_compiling" != xyes], [
|
|
AC_RUN_IFELSE([
|
|
AC_LANG_PROGRAM([
|
|
#include "$LINUX/include/linux/license.h"
|
|
], [
|
|
return !license_is_gpl_compatible(
|
|
"$SPL_META_LICENSE");
|
|
])
|
|
], [
|
|
AC_DEFINE([SPL_IS_GPL_COMPATIBLE], [1],
|
|
[Define to 1 if GPL-only symbols can be used])
|
|
], [
|
|
])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Use the atomic implemenation based on global spinlocks. This
|
|
dnl # should only be needed by 32-bit kernels which do not provide
|
|
dnl # the atomic64_* API. It may be optionally enabled as a fallback
|
|
dnl # if problems are observed with the direct mapping to the native
|
|
dnl # Linux atomic operations. You may not disable atomic spinlocks
|
|
dnl # if you kernel does not an atomic64_* API.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
|
|
AC_ARG_ENABLE([atomic-spinlocks],
|
|
[AS_HELP_STRING([--enable-atomic-spinlocks],
|
|
[Atomic types use spinlocks @<:@default=check@:>@])],
|
|
[],
|
|
[enable_atomic_spinlocks=check])
|
|
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
atomic64_t *ptr __attribute__ ((unused));
|
|
],[
|
|
have_atomic64_t=yes
|
|
AC_DEFINE(HAVE_ATOMIC64_T, 1,
|
|
[kernel defines atomic64_t])
|
|
],[
|
|
have_atomic64_t=no
|
|
])
|
|
|
|
AS_IF([test "x$enable_atomic_spinlocks" = xcheck], [
|
|
AS_IF([test "x$have_atomic64_t" = xyes], [
|
|
enable_atomic_spinlocks=no
|
|
],[
|
|
enable_atomic_spinlocks=yes
|
|
])
|
|
])
|
|
|
|
AS_IF([test "x$enable_atomic_spinlocks" = xyes], [
|
|
AC_DEFINE([ATOMIC_SPINLOCK], [1],
|
|
[Atomic types use spinlocks])
|
|
],[
|
|
AS_IF([test "x$have_atomic64_t" = xno], [
|
|
AC_MSG_FAILURE(
|
|
[--disable-atomic-spinlocks given but required atomic64 support is unavailable])
|
|
])
|
|
])
|
|
|
|
AC_MSG_CHECKING([whether atomic types use spinlocks])
|
|
AC_MSG_RESULT([$enable_atomic_spinlocks])
|
|
|
|
AC_MSG_CHECKING([whether kernel defines atomic64_t])
|
|
AC_MSG_RESULT([$have_atomic64_t])
|
|
])
|
|
|
|
AC_DEFUN([SPL_AC_SHRINKER_CALLBACK],[
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
dnl #
|
|
dnl # 2.6.23 to 2.6.34 API change
|
|
dnl # ->shrink(int nr_to_scan, gfp_t gfp_mask)
|
|
dnl #
|
|
AC_MSG_CHECKING([whether old 2-argument shrinker exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
|
|
int shrinker_cb(int nr_to_scan, gfp_t gfp_mask);
|
|
],[
|
|
struct shrinker cache_shrinker = {
|
|
.shrink = shrinker_cb,
|
|
.seeks = DEFAULT_SEEKS,
|
|
};
|
|
register_shrinker(&cache_shrinker);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_OLD_SHRINKER_CALLBACK, 1,
|
|
[old shrinker callback wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # 2.6.35 - 2.6.39 API change
|
|
dnl # ->shrink(struct shrinker *,
|
|
dnl # int nr_to_scan, gfp_t gfp_mask)
|
|
dnl #
|
|
AC_MSG_CHECKING([whether old 3-argument shrinker exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
|
|
int shrinker_cb(struct shrinker *, int nr_to_scan,
|
|
gfp_t gfp_mask);
|
|
],[
|
|
struct shrinker cache_shrinker = {
|
|
.shrink = shrinker_cb,
|
|
.seeks = DEFAULT_SEEKS,
|
|
};
|
|
register_shrinker(&cache_shrinker);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1,
|
|
[old shrinker callback wants 3 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # 3.0 - 3.11 API change
|
|
dnl # ->shrink(struct shrinker *,
|
|
dnl # struct shrink_control *sc)
|
|
dnl #
|
|
AC_MSG_CHECKING(
|
|
[whether new 2-argument shrinker exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
|
|
int shrinker_cb(struct shrinker *,
|
|
struct shrink_control *sc);
|
|
],[
|
|
struct shrinker cache_shrinker = {
|
|
.shrink = shrinker_cb,
|
|
.seeks = DEFAULT_SEEKS,
|
|
};
|
|
register_shrinker(&cache_shrinker);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_NEW_SHRINKER_CALLBACK, 1,
|
|
[new shrinker callback wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # 3.12 API change,
|
|
dnl # ->shrink() is logically split in to
|
|
dnl # ->count_objects() and ->scan_objects()
|
|
dnl #
|
|
AC_MSG_CHECKING(
|
|
[whether ->count_objects callback exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
|
|
unsigned long shrinker_cb(
|
|
struct shrinker *,
|
|
struct shrink_control *sc);
|
|
],[
|
|
struct shrinker cache_shrinker = {
|
|
.count_objects = shrinker_cb,
|
|
.scan_objects = shrinker_cb,
|
|
.seeks = DEFAULT_SEEKS,
|
|
};
|
|
register_shrinker(&cache_shrinker);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK,
|
|
1, [->count_objects exists])
|
|
],[
|
|
AC_MSG_ERROR(error)
|
|
])
|
|
])
|
|
])
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.33 API change,
|
|
dnl # Removed .ctl_name from struct ctl_table.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CTL_NAME], [
|
|
AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/sysctl.h>
|
|
],[
|
|
struct ctl_table ctl __attribute__ ((unused));
|
|
ctl.ctl_name = 0;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.10 API change,
|
|
dnl # PDE is replaced by PDE_DATA
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PDE_DATA], [
|
|
AC_MSG_CHECKING([whether PDE_DATA() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/proc_fs.h>
|
|
], [
|
|
PDE_DATA(NULL);
|
|
], [PDE_DATA], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_PDE_DATA, 1, [yes])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.9 API change
|
|
dnl # set_fs_pwd takes const struct path *
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SET_FS_PWD_WITH_CONST],
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
[AC_MSG_CHECKING([whether set_fs_pwd() requires const struct path *])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/spinlock.h>
|
|
#include <linux/fs_struct.h>
|
|
#include <linux/path.h>
|
|
void (*const set_fs_pwd_func)
|
|
(struct fs_struct *, const struct path *)
|
|
= set_fs_pwd;
|
|
],[
|
|
return 0;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SET_FS_PWD_WITH_CONST, 1,
|
|
[set_fs_pwd() needs const path *])
|
|
],[
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/spinlock.h>
|
|
#include <linux/fs_struct.h>
|
|
#include <linux/path.h>
|
|
void (*const set_fs_pwd_func)
|
|
(struct fs_struct *, struct path *)
|
|
= set_fs_pwd;
|
|
],[
|
|
return 0;
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
],[
|
|
AC_MSG_ERROR(unknown)
|
|
])
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.13 API change
|
|
dnl # vfs_unlink() updated to take a third delegated_inode argument.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_2ARGS_VFS_UNLINK],
|
|
[AC_MSG_CHECKING([whether vfs_unlink() wants 2 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_unlink((struct inode *) NULL, (struct dentry *) NULL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
|
|
[vfs_unlink() wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # Linux 3.13 API change
|
|
dnl # Added delegated inode
|
|
dnl #
|
|
AC_MSG_CHECKING([whether vfs_unlink() wants 3 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_unlink((struct inode *) NULL,
|
|
(struct dentry *) NULL,
|
|
(struct inode **) NULL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_3ARGS_VFS_UNLINK, 1,
|
|
[vfs_unlink() wants 3 args])
|
|
],[
|
|
AC_MSG_ERROR(no)
|
|
])
|
|
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.13 and 3.15 API changes
|
|
dnl # Added delegated inode and flags argument.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_4ARGS_VFS_RENAME],
|
|
[AC_MSG_CHECKING([whether vfs_rename() wants 4 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_rename((struct inode *) NULL, (struct dentry *) NULL,
|
|
(struct inode *) NULL, (struct dentry *) NULL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
|
|
[vfs_rename() wants 4 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # Linux 3.13 API change
|
|
dnl # Added delegated inode
|
|
dnl #
|
|
AC_MSG_CHECKING([whether vfs_rename() wants 5 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_rename((struct inode *) NULL,
|
|
(struct dentry *) NULL,
|
|
(struct inode *) NULL,
|
|
(struct dentry *) NULL,
|
|
(struct inode **) NULL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_5ARGS_VFS_RENAME, 1,
|
|
[vfs_rename() wants 5 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
dnl #
|
|
dnl # Linux 3.15 API change
|
|
dnl # Added flags
|
|
dnl #
|
|
AC_MSG_CHECKING([whether vfs_rename() wants 6 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_rename((struct inode *) NULL,
|
|
(struct dentry *) NULL,
|
|
(struct inode *) NULL,
|
|
(struct dentry *) NULL,
|
|
(struct inode **) NULL,
|
|
(unsigned int) 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_6ARGS_VFS_RENAME, 1,
|
|
[vfs_rename() wants 6 args])
|
|
],[
|
|
AC_MSG_ERROR(no)
|
|
])
|
|
])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.36 API change,
|
|
dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
|
|
dnl # a spinlock_t to improve the fastpath performance.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
|
|
AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/sched.h>
|
|
#include <linux/fs_struct.h>
|
|
],[
|
|
static struct fs_struct fs;
|
|
spin_lock_init(&fs.lock);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_FS_STRUCT_SPINLOCK, 1,
|
|
[struct fs_struct uses spinlock_t])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # User namespaces, use kuid_t in place of uid_t
|
|
dnl # where available. Not strictly a user namespaces thing
|
|
dnl # but it should prevent surprises
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KUIDGID_T], [
|
|
AC_MSG_CHECKING([whether kuid_t/kgid_t is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/uidgid.h>
|
|
], [
|
|
kuid_t userid = KUIDT_INIT(0);
|
|
kgid_t groupid = KGIDT_INIT(0);
|
|
],[
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/uidgid.h>
|
|
], [
|
|
kuid_t userid = 0;
|
|
kgid_t groupid = 0;
|
|
],[
|
|
AC_MSG_RESULT(yes; optional)
|
|
],[
|
|
AC_MSG_RESULT(yes; mandatory)
|
|
AC_DEFINE(HAVE_KUIDGID_T, 1, [kuid_t/kgid_t in use])
|
|
])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.39 API change,
|
|
dnl # __put_task_struct() was exported by the mainline kernel.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PUT_TASK_STRUCT],
|
|
[AC_MSG_CHECKING([whether __put_task_struct() is available])
|
|
SPL_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/sched.h>
|
|
], [
|
|
__put_task_struct(NULL);
|
|
], [__put_task_struct], [], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_PUT_TASK_STRUCT, 1,
|
|
[__put_task_struct() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.35 API change,
|
|
dnl # Unused 'struct dentry *' removed from vfs_fsync() prototype.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_2ARGS_VFS_FSYNC], [
|
|
AC_MSG_CHECKING([whether vfs_fsync() wants 2 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_fsync(NULL, 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_VFS_FSYNC, 1, [vfs_fsync() wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.5 API change,
|
|
dnl # inode_operations.truncate_range removed
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_INODE_TRUNCATE_RANGE], [
|
|
AC_MSG_CHECKING([whether truncate_range() inode operation is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
struct inode_operations ops;
|
|
ops.truncate_range = NULL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_INODE_TRUNCATE_RANGE, 1,
|
|
[truncate_range() inode operation is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Linux 2.6.38 - 3.x API
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KERNEL_FILE_FALLOCATE], [
|
|
AC_MSG_CHECKING([whether fops->fallocate() exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
|
|
struct file_operations fops __attribute__ ((unused)) = {
|
|
.fallocate = fallocate,
|
|
};
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Linux 2.6.x - 2.6.37 API
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KERNEL_INODE_FALLOCATE], [
|
|
AC_MSG_CHECKING([whether iops->fallocate() exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
long (*fallocate) (struct inode *, int, loff_t, loff_t) = NULL;
|
|
struct inode_operations fops __attribute__ ((unused)) = {
|
|
.fallocate = fallocate,
|
|
};
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_INODE_FALLOCATE, 1, [fops->fallocate() exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # PaX Linux 2.6.38 - 3.x API
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PAX_KERNEL_FILE_FALLOCATE], [
|
|
AC_MSG_CHECKING([whether fops->fallocate() exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;
|
|
struct file_operations_no_const fops __attribute__ ((unused)) = {
|
|
.fallocate = fallocate,
|
|
};
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # The fallocate callback was moved from the inode_operations
|
|
dnl # structure to the file_operations structure.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KERNEL_FALLOCATE], [
|
|
SPL_AC_KERNEL_FILE_FALLOCATE
|
|
SPL_AC_KERNEL_INODE_FALLOCATE
|
|
SPL_AC_PAX_KERNEL_FILE_FALLOCATE
|
|
])
|
|
|
|
dnl #
|
|
dnl # zlib inflate compat,
|
|
dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CONFIG_ZLIB_INFLATE], [
|
|
AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#if !defined(CONFIG_ZLIB_INFLATE) && \
|
|
!defined(CONFIG_ZLIB_INFLATE_MODULE)
|
|
#error CONFIG_ZLIB_INFLATE not defined
|
|
#endif
|
|
],[ ],[
|
|
AC_MSG_RESULT([yes])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
AC_MSG_ERROR([
|
|
*** This kernel does not include the required zlib inflate support.
|
|
*** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # zlib deflate compat,
|
|
dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CONFIG_ZLIB_DEFLATE], [
|
|
AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#if !defined(CONFIG_ZLIB_DEFLATE) && \
|
|
!defined(CONFIG_ZLIB_DEFLATE_MODULE)
|
|
#error CONFIG_ZLIB_DEFLATE not defined
|
|
#endif
|
|
],[ ],[
|
|
AC_MSG_RESULT([yes])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
AC_MSG_ERROR([
|
|
*** This kernel does not include the required zlib deflate support.
|
|
*** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # config trim unused symbols,
|
|
dnl # Verify the kernel has CONFIG_TRIM_UNUSED_KSYMS DISABLED.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CONFIG_TRIM_UNUSED_KSYMS], [
|
|
AC_MSG_CHECKING([whether CONFIG_TRIM_UNUSED_KSYM is disabled])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#if defined(CONFIG_TRIM_UNUSED_KSYMS)
|
|
#error CONFIG_TRIM_UNUSED_KSYMS not defined
|
|
#endif
|
|
],[ ],[
|
|
AC_MSG_RESULT([yes])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
AC_MSG_ERROR([
|
|
*** This kernel has unused symbols trimming enabled, please disable.
|
|
*** Rebuild the kernel with CONFIG_TRIM_UNUSED_KSYMS=n set.])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.39 API compat,
|
|
dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
|
|
dnl # This was done to avoid always having to allocate the maximum size
|
|
dnl # workspace (268K). The caller can now specific the windowBits and
|
|
dnl # memLevel compression parameters to get a smaller workspace.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
|
|
[AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/zlib.h>
|
|
],[
|
|
return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
|
|
[zlib_deflate_workspacesize() wants 2 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.39 API change,
|
|
dnl # Shrinker adjust to use common shrink_control structure.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
|
|
AC_MSG_CHECKING([whether struct shrink_control exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
struct shrink_control sc __attribute__ ((unused));
|
|
|
|
sc.nr_to_scan = 0;
|
|
sc.gfp_mask = GFP_KERNEL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1,
|
|
[struct shrink_control exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.1 API Change
|
|
dnl #
|
|
dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
|
|
dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
|
|
AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/rwsem.h>
|
|
],[
|
|
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
|
|
raw_spinlock_t dummy_lock __attribute__ ((unused));
|
|
dummy_semaphore.wait_lock = dummy_lock;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
|
|
[struct rw_semaphore member wait_lock is raw_spinlock_t])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.16 API Change
|
|
dnl #
|
|
dnl # rwsem-spinlock "->activity" changed to "->count"
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_RWSEM_ACTIVITY], [
|
|
AC_MSG_CHECKING([whether struct rw_semaphore has member activity])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/rwsem.h>
|
|
],[
|
|
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
|
|
dummy_semaphore.activity = 0;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_RWSEM_ACTIVITY, 1,
|
|
[struct rw_semaphore has member activity])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 4.8 API Change
|
|
dnl #
|
|
dnl # rwsem "->count" changed to atomic_long_t type
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_RWSEM_ATOMIC_LONG_COUNT], [
|
|
AC_MSG_CHECKING(
|
|
[whether struct rw_semaphore has atomic_long_t member count])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/rwsem.h>
|
|
],[
|
|
DECLARE_RWSEM(dummy_semaphore);
|
|
(void) atomic_long_read(&dummy_semaphore.count);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_RWSEM_ATOMIC_LONG_COUNT, 1,
|
|
[struct rw_semaphore has atomic_long_t member count])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.9 API change,
|
|
dnl # Moved things from linux/sched.h to linux/sched/rt.h
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SCHED_RT_HEADER],
|
|
[AC_MSG_CHECKING([whether header linux/sched/rt.h exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/sched.h>
|
|
#include <linux/sched/rt.h>
|
|
],[
|
|
return 0;
|
|
],[
|
|
AC_DEFINE(HAVE_SCHED_RT_HEADER, 1, [linux/sched/rt.h exists])
|
|
AC_MSG_RESULT(yes)
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.9 API change,
|
|
dnl # vfs_getattr() uses 2 args
|
|
dnl # It takes struct path * instead of struct vfsmount * and struct dentry *
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_2ARGS_VFS_GETATTR], [
|
|
AC_MSG_CHECKING([whether vfs_getattr() wants])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_getattr((struct path *) NULL,
|
|
(struct kstat *)NULL);
|
|
],[
|
|
AC_MSG_RESULT(2 args)
|
|
AC_DEFINE(HAVE_2ARGS_VFS_GETATTR, 1,
|
|
[vfs_getattr wants 2 args])
|
|
],[
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
vfs_getattr((struct vfsmount *)NULL,
|
|
(struct dentry *)NULL,
|
|
(struct kstat *)NULL);
|
|
],[
|
|
AC_MSG_RESULT(3 args)
|
|
],[
|
|
AC_MSG_ERROR(unknown)
|
|
])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.36 API compatibility.
|
|
dnl # Added usleep_range timer.
|
|
dnl # usleep_range is a finer precision implementation of msleep
|
|
dnl # designed to be a drop-in replacement for udelay where a precise
|
|
dnl # sleep / busy-wait is unnecessary.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_USLEEP_RANGE], [
|
|
AC_MSG_CHECKING([whether usleep_range() is available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/delay.h>
|
|
],[
|
|
usleep_range(0, 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_USLEEP_RANGE, 1,
|
|
[usleep_range is available])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.35 API change,
|
|
dnl # The cachep->gfpflags member was renamed cachep->allocflags. These are
|
|
dnl # private allocation flags which are applied when allocating a new slab
|
|
dnl # in kmem_getpages(). Unfortunately there is no public API for setting
|
|
dnl # non-default flags.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_KMEM_CACHE_ALLOCFLAGS], [
|
|
AC_MSG_CHECKING([whether struct kmem_cache has allocflags])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/slab.h>
|
|
],[
|
|
struct kmem_cache cachep __attribute__ ((unused));
|
|
cachep.allocflags = GFP_KERNEL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_KMEM_CACHE_ALLOCFLAGS, 1,
|
|
[struct kmem_cache has allocflags])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
|
|
AC_MSG_CHECKING([whether struct kmem_cache has gfpflags])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/slab.h>
|
|
],[
|
|
struct kmem_cache cachep __attribute__ ((unused));
|
|
cachep.gfpflags = GFP_KERNEL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_KMEM_CACHE_GFPFLAGS, 1,
|
|
[struct kmem_cache has gfpflags])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.17 API change,
|
|
dnl # wait_on_bit() no longer requires an action argument. The former
|
|
dnl # "wait_on_bit" interface required an 'action' function to be provided
|
|
dnl # which does the actual waiting. There were over 20 such functions in the
|
|
dnl # kernel, many of them identical, though most cases can be satisfied by one
|
|
dnl # of just two functions: one which uses io_schedule() and one which just
|
|
dnl # uses schedule(). This API change was made to consolidate all of those
|
|
dnl # redundant wait functions.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_WAIT_ON_BIT], [
|
|
AC_MSG_CHECKING([whether wait_on_bit() takes an action])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/wait.h>
|
|
],[
|
|
int (*action)(void *) = NULL;
|
|
wait_on_bit(NULL, 0, action, 0);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_WAIT_ON_BIT_ACTION, 1, [yes])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Check whether mutex has owner with task_struct type.
|
|
dnl #
|
|
dnl # Note that before Linux 3.0, mutex owner is of type thread_info.
|
|
dnl #
|
|
dnl # Note that in Linux 3.18, the condition for owner is changed from
|
|
dnl # defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_SMP) to
|
|
dnl # defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_MUTEX_SPIN_ON_OWNER)
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_MUTEX_OWNER], [
|
|
AC_MSG_CHECKING([whether mutex has owner])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mutex.h>
|
|
#include <linux/spinlock.h>
|
|
],[
|
|
DEFINE_MUTEX(m);
|
|
struct task_struct *t __attribute__ ((unused));
|
|
t = m.owner;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_MUTEX_OWNER, 1, [yes])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 4.7 API change
|
|
dnl # i_mutex is changed to i_rwsem. Instead of directly using
|
|
dnl # i_mutex/i_rwsem, we should use inode_lock() and inode_lock_shared()
|
|
dnl # We test inode_lock_shared because inode_lock is introduced earlier.
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_INODE_LOCK], [
|
|
AC_MSG_CHECKING([whether inode_lock_shared() exists])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/fs.h>
|
|
],[
|
|
struct inode *inode = NULL;
|
|
inode_lock_shared(inode);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_INODE_LOCK_SHARED, 1, [yes])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|