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86c16c59fe
Stock Linux 2.6.32 and earlier kernels contained a broken version of rwsem_is_locked() which could return an incorrect value. Because of this compatibility code was added to detect the broken implementation and replace it with our own if needed. The fix for this issue was merged in to the mainline Linux kernel as of 2.6.33 and the major enterprise distributions based on 2.6.32 have all backported the fix. Therefore there is no longer a need to carry this code and it can be removed. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #454
1448 lines
37 KiB
Plaintext
1448 lines
37 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_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_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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])
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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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|
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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],
|
|
[Enable generic debug support @<:@default=no@:>@])],
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[],
|
|
[enable_debug=no])
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|
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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="${KERNELCPPFLAGS} -DNDEBUG"
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DEBUG_CFLAGS="-DNDEBUG"
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DEBUG_SPL="_without_debug"
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])
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|
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AC_SUBST(DEBUG_CFLAGS)
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AC_SUBST(DEBUG_SPL)
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AC_MSG_RESULT([$enable_debug])
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])
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|
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dnl #
|
|
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. Additionally, /proc/spl/kmem/slab will exist
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|
dnl # and provide an easy way to inspect the kmem based slab.
|
|
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=yes@:>@])],
|
|
[],
|
|
[enable_debug_kmem=yes])
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|
|
AS_IF([test "x$enable_debug_kmem" = xyes],
|
|
[
|
|
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
|
|
DEBUG_KMEM="_with_debug_kmem"
|
|
AC_DEFINE([DEBUG_KMEM], [1],
|
|
[Define to 1 to enable basic kmem accounting])
|
|
], [
|
|
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
|
|
])
|
|
|
|
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 # 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 # 3.9 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)
|
|
])
|
|
])
|