-AC_DEFUN([SPL_AC_KERNEL], [
- ver=`uname -r`
+###############################################################################
+# Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
+# Copyright (C) 2007 The Regents of the University of California.
+# Written by Brian Behlendorf <behlendorf1@llnl.gov>.
+###############################################################################
+# SPL_AC_CONFIG_KERNEL: Default SPL kernel configuration.
+###############################################################################
+
+AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
+ SPL_AC_KERNEL
+ SPL_AC_KERNEL_CONFIG
+
+ if test "${LINUX_OBJ}" != "${LINUX}"; then
+ KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
+ fi
+ AC_SUBST(KERNELMAKE_PARAMS)
+
+ KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
+ AC_SUBST(KERNELCPPFLAGS)
+
+ SPL_AC_DEBUG
+ SPL_AC_DEBUG_LOG
+ SPL_AC_DEBUG_KMEM
+ SPL_AC_DEBUG_KMEM_TRACKING
+ SPL_AC_ATOMIC_SPINLOCK
+ SPL_AC_TYPE_ATOMIC64_CMPXCHG
+ SPL_AC_TYPE_ATOMIC64_XCHG
+ SPL_AC_TYPE_UINTPTR_T
+ SPL_AC_3ARGS_INIT_WORK
+ SPL_AC_2ARGS_REGISTER_SYSCTL
+ SPL_AC_SET_SHRINKER
+ SPL_AC_3ARGS_SHRINKER_CALLBACK
+ SPL_AC_PATH_IN_NAMEIDATA
+ SPL_AC_TASK_CURR
+ SPL_AC_CTL_UNNUMBERED
+ SPL_AC_CTL_NAME
+ SPL_AC_FLS64
+ SPL_AC_DEVICE_CREATE
+ SPL_AC_5ARGS_DEVICE_CREATE
+ SPL_AC_CLASS_DEVICE_CREATE
+ SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT
+ SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE
+ SPL_AC_TIMESPEC_SUB
+ SPL_AC_INIT_UTSNAME
+ SPL_AC_FDTABLE_HEADER
+ SPL_AC_FILES_FDTABLE
+ SPL_AC_UACCESS_HEADER
+ SPL_AC_KMALLOC_NODE
+ SPL_AC_MONOTONIC_CLOCK
+ SPL_AC_INODE_I_MUTEX
+ SPL_AC_MUTEX_OWNER
+ SPL_AC_MUTEX_OWNER_TASK_STRUCT
+ SPL_AC_MUTEX_LOCK_NESTED
+ SPL_AC_3ARGS_ON_EACH_CPU
+ SPL_AC_KALLSYMS_LOOKUP_NAME
+ SPL_AC_GET_VMALLOC_INFO
+ SPL_AC_PGDAT_HELPERS
+ SPL_AC_FIRST_ONLINE_PGDAT
+ SPL_AC_NEXT_ONLINE_PGDAT
+ SPL_AC_NEXT_ZONE
+ SPL_AC_PGDAT_LIST
+ SPL_AC_GLOBAL_PAGE_STATE
+ SPL_AC_ZONE_STAT_ITEM_FREE
+ SPL_AC_ZONE_STAT_ITEM_INACTIVE
+ SPL_AC_ZONE_STAT_ITEM_ACTIVE
+ SPL_AC_GET_ZONE_COUNTS
+ SPL_AC_USER_PATH_DIR
+ SPL_AC_SET_FS_PWD
+ SPL_AC_2ARGS_SET_FS_PWD
+ SPL_AC_2ARGS_VFS_UNLINK
+ SPL_AC_4ARGS_VFS_RENAME
+ SPL_AC_VFS_FSYNC
+ SPL_AC_2ARGS_VFS_FSYNC
+ SPL_AC_FS_STRUCT_SPINLOCK
+ SPL_AC_CRED_STRUCT
+ SPL_AC_GROUPS_SEARCH
+ SPL_AC_PUT_TASK_STRUCT
+ SPL_AC_5ARGS_PROC_HANDLER
+ SPL_AC_KVASPRINTF
+ SPL_AC_EXPORTED_RWSEM_IS_LOCKED
+ SPL_AC_KERNEL_INVALIDATE_INODES
+ SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES
+ SPL_AC_SHRINK_DCACHE_MEMORY
+ SPL_AC_SHRINK_ICACHE_MEMORY
+ SPL_AC_KERN_PATH_PARENT_HEADER
+ SPL_AC_KERN_PATH_PARENT_SYMBOL
+ SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
+ SPL_AC_SHRINK_CONTROL_STRUCT
+ SPL_AC_RWSEM_SPINLOCK_IS_RAW
+])
+
+AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
+ modpost=$LINUX/scripts/Makefile.modpost
+ AC_MSG_CHECKING([kernel file name for module symbols])
+ if test -f "$modpost"; then
+ if grep -q Modules.symvers $modpost; then
+ LINUX_SYMBOLS=Modules.symvers
+ else
+ LINUX_SYMBOLS=Module.symvers
+ fi
+
+ if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
+ AC_MSG_ERROR([
+ *** Please make sure the kernel devel package for your distribution
+ *** is installed. If your building with a custom kernel make sure the
+ *** kernel is configured, built, and the '--with-linux=PATH' configure
+ *** option refers to the location of the kernel source.])
+ fi
+ else
+ LINUX_SYMBOLS=NONE
+ fi
+ AC_MSG_RESULT($LINUX_SYMBOLS)
+ AC_SUBST(LINUX_SYMBOLS)
+])
+AC_DEFUN([SPL_AC_KERNEL], [
AC_ARG_WITH([linux],
AS_HELP_STRING([--with-linux=PATH],
[Path to kernel source]),
- [kernelsrc="$withval"; kernelbuild="$withval"])
+ [kernelsrc="$withval"])
AC_ARG_WITH([linux-obj],
AS_HELP_STRING([--with-linux-obj=PATH],
AC_MSG_CHECKING([kernel source directory])
if test -z "$kernelsrc"; then
- kernelbuild=
- sourcelink=/lib/modules/${ver}/source
- buildlink=/lib/modules/${ver}/build
-
- if test -e $sourcelink; then
- kernelsrc=`(cd $sourcelink; /bin/pwd)`
- fi
- if test -e $buildlink; then
- kernelbuild=`(cd $buildlink; /bin/pwd)`
- fi
- if test -z "$kernelsrc"; then
- kernelsrc=$kernelbuild
+ if test -e "/lib/modules/$(uname -r)/source"; then
+ headersdir="/lib/modules/$(uname -r)/source"
+ sourcelink=$(readlink -f "$headersdir")
+ elif test -e "/lib/modules/$(uname -r)/build"; then
+ headersdir="/lib/modules/$(uname -r)/build"
+ sourcelink=$(readlink -f "$headersdir")
+ else
+ sourcelink=$(ls -1d /usr/src/kernels/* \
+ /usr/src/linux-* \
+ 2>/dev/null | grep -v obj | tail -1)
fi
- if test -z "$kernelsrc" -o -z "$kernelbuild"; then
+
+ if test -n "$sourcelink" && test -e ${sourcelink}; then
+ kernelsrc=`readlink -f ${sourcelink}`
+ else
AC_MSG_RESULT([Not found])
AC_MSG_ERROR([
- *** Please specify the location of the kernel source
- *** with the '--with-linux=PATH' option])
+ *** Please make sure the kernel devel package for your distribution
+ *** is installed then try again. If that fails you can specify the
+ *** location of the kernel source with the '--with-linux=PATH' option.])
+ fi
+ else
+ if test "$kernelsrc" = "NONE"; then
+ kernsrcver=NONE
fi
fi
AC_MSG_RESULT([$kernelsrc])
AC_MSG_CHECKING([kernel build directory])
+ if test -z "$kernelbuild"; then
+ if test -e "/lib/modules/$(uname -r)/build"; then
+ kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
+ elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
+ kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
+ elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
+ kernelbuild=${kernelsrc}-obj/${target_cpu}/default
+ elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
+ kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
+ else
+ kernelbuild=${kernelsrc}
+ fi
+ fi
AC_MSG_RESULT([$kernelbuild])
AC_MSG_CHECKING([kernel source version])
- if test -r $kernelbuild/include/linux/version.h &&
- fgrep -q UTS_RELEASE $kernelbuild/include/linux/version.h; then
-
- kernsrcver=`(echo "#include <linux/version.h>";
- echo "kernsrcver=UTS_RELEASE") |
- cpp -I $kernelbuild/include |
- grep "^kernsrcver=" | cut -d \" -f 2`
-
- elif test -r $kernelbuild/include/linux/utsrelease.h &&
- fgrep -q UTS_RELEASE $kernelbuild/include/linux/utsrelease.h; then
+ utsrelease1=$kernelbuild/include/linux/version.h
+ utsrelease2=$kernelbuild/include/linux/utsrelease.h
+ utsrelease3=$kernelbuild/include/generated/utsrelease.h
+ if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
+ utsrelease=linux/version.h
+ elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
+ utsrelease=linux/utsrelease.h
+ elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
+ utsrelease=generated/utsrelease.h
+ fi
- kernsrcver=`(echo "#include <linux/utsrelease.h>";
+ if test "$utsrelease"; then
+ kernsrcver=`(echo "#include <$utsrelease>";
echo "kernsrcver=UTS_RELEASE") |
- cpp -I $kernelbuild/include |
+ cpp -I $kernelbuild/include |
grep "^kernsrcver=" | cut -d \" -f 2`
- fi
- if test -z "$kernsrcver"; then
+ if test -z "$kernsrcver"; then
+ AC_MSG_RESULT([Not found])
+ AC_MSG_ERROR([*** Cannot determine kernel version.])
+ fi
+ else
AC_MSG_RESULT([Not found])
- AC_MSG_ERROR([
- *** Cannot determine the version of the linux kernel source.
- *** Please prepare the kernel before running this script])
+ AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
fi
AC_MSG_RESULT([$kernsrcver])
- kmoduledir=${INSTALL_MOD_PATH}/lib/modules/$kernsrcver
LINUX=${kernelsrc}
LINUX_OBJ=${kernelbuild}
+ LINUX_VERSION=${kernsrcver}
AC_SUBST(LINUX)
AC_SUBST(LINUX_OBJ)
- AC_SUBST(kmoduledir)
+ AC_SUBST(LINUX_VERSION)
+
+ SPL_AC_MODULE_SYMVERS
+])
+
+AC_DEFUN([SPL_AC_KERNEL_CONFIG], [
+ SPL_LINUX_CONFIG([PREEMPT],
+ AC_MSG_ERROR([
+ *** Kernel built with CONFIG_PREEMPT which is not supported.
+ ** You must rebuild your kernel without this option.]), [])
+])
+
+dnl #
+dnl # Default SPL user configuration
+dnl #
+AC_DEFUN([SPL_AC_CONFIG_USER], [])
+
+dnl #
+dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
+dnl # are missing it is non-fatal but you will not be able to build
+dnl # RPM packages and will be warned if you try too.
+dnl #
+AC_DEFUN([SPL_AC_RPM], [
+ RPM=rpm
+ RPMBUILD=rpmbuild
+
+ AC_MSG_CHECKING([whether $RPM is available])
+ AS_IF([tmp=$($RPM --version 2>/dev/null)], [
+ RPM_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
+ HAVE_RPM=yes
+ AC_MSG_RESULT([$HAVE_RPM ($RPM_VERSION)])
+ ],[
+ HAVE_RPM=no
+ AC_MSG_RESULT([$HAVE_RPM])
+ ])
+
+ AC_MSG_CHECKING([whether $RPMBUILD is available])
+ AS_IF([tmp=$($RPMBUILD --version 2>/dev/null)], [
+ RPMBUILD_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
+ HAVE_RPMBUILD=yes
+ AC_MSG_RESULT([$HAVE_RPMBUILD ($RPMBUILD_VERSION)])
+ ],[
+ HAVE_RPMBUILD=no
+ AC_MSG_RESULT([$HAVE_RPMBUILD])
+ ])
+
+ AC_SUBST(HAVE_RPM)
+ AC_SUBST(RPM)
+ AC_SUBST(RPM_VERSION)
+
+ AC_SUBST(HAVE_RPMBUILD)
+ AC_SUBST(RPMBUILD)
+ AC_SUBST(RPMBUILD_VERSION)
+])
+
+dnl #
+dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
+dnl # tools are missing it is non-fatal but you will not be able to build
+dnl # DEB packages and will be warned if you try too.
+dnl #
+AC_DEFUN([SPL_AC_DPKG], [
+ DPKG=dpkg
+ DPKGBUILD=dpkg-buildpackage
+
+ AC_MSG_CHECKING([whether $DPKG is available])
+ AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
+ DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
+ HAVE_DPKG=yes
+ AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
+ ],[
+ HAVE_DPKG=no
+ AC_MSG_RESULT([$HAVE_DPKG])
+ ])
+
+ AC_MSG_CHECKING([whether $DPKGBUILD is available])
+ AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
+ DPKGBUILD_VERSION=$(echo $tmp | \
+ $AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
+ HAVE_DPKGBUILD=yes
+ AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
+ ],[
+ HAVE_DPKGBUILD=no
+ AC_MSG_RESULT([$HAVE_DPKGBUILD])
+ ])
+
+ AC_SUBST(HAVE_DPKG)
+ AC_SUBST(DPKG)
+ AC_SUBST(DPKG_VERSION)
+
+ AC_SUBST(HAVE_DPKGBUILD)
+ AC_SUBST(DPKGBUILD)
+ AC_SUBST(DPKGBUILD_VERSION)
+])
+
+dnl #
+dnl # Check for pacman+makepkg to build Arch Linux packages. If these
+dnl # tools are missing it is non-fatal but you will not be able to
+dnl # build Arch Linux packages and will be warned if you try too.
+dnl #
+AC_DEFUN([SPL_AC_PACMAN], [
+ PACMAN=pacman
+ MAKEPKG=makepkg
+
+ AC_MSG_CHECKING([whether $PACMAN is available])
+ tmp=$($PACMAN --version 2>/dev/null)
+ AS_IF([test -n "$tmp"], [
+ PACMAN_VERSION=$(echo $tmp |
+ $AWK '/Pacman/ { print $[3] }' |
+ $SED 's/^v//')
+ HAVE_PACMAN=yes
+ AC_MSG_RESULT([$HAVE_PACMAN ($PACMAN_VERSION)])
+ ],[
+ HAVE_PACMAN=no
+ AC_MSG_RESULT([$HAVE_PACMAN])
+ ])
+
+ AC_MSG_CHECKING([whether $MAKEPKG is available])
+ tmp=$($MAKEPKG --version 2>/dev/null)
+ AS_IF([test -n "$tmp"], [
+ MAKEPKG_VERSION=$(echo $tmp | $AWK '/makepkg/ { print $[3] }')
+ HAVE_MAKEPKG=yes
+ AC_MSG_RESULT([$HAVE_MAKEPKG ($MAKEPKG_VERSION)])
+ ],[
+ HAVE_MAKEPKG=no
+ AC_MSG_RESULT([$HAVE_MAKEPKG])
+ ])
+
+ AC_SUBST(HAVE_PACMAN)
+ AC_SUBST(PACMAN)
+ AC_SUBST(PACMAN_VERSION)
+
+ AC_SUBST(HAVE_MAKEPKG)
+ AC_SUBST(MAKEPKG)
+ AC_SUBST(MAKEPKG_VERSION)
+])
+
+dnl #
+dnl # Until native packaging for various different packing systems
+dnl # can be added the least we can do is attempt to use alien to
+dnl # convert the RPM packages to the needed package type. This is
+dnl # a hack but so far it has worked reasonable well.
+dnl #
+AC_DEFUN([SPL_AC_ALIEN], [
+ ALIEN=alien
+
+ AC_MSG_CHECKING([whether $ALIEN is available])
+ AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
+ ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
+ HAVE_ALIEN=yes
+ AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
+ ],[
+ HAVE_ALIEN=no
+ AC_MSG_RESULT([$HAVE_ALIEN])
+ ])
+
+ AC_SUBST(HAVE_ALIEN)
+ AC_SUBST(ALIEN)
+ AC_SUBST(ALIEN_VERSION)
+])
+
+dnl #
+dnl # Using the VENDOR tag from config.guess set the default
+dnl # package type for 'make pkg': (rpm | deb | tgz)
+dnl #
+AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
+ AC_MSG_CHECKING([linux distribution])
+ if test -f /etc/redhat-release ; then
+ VENDOR=redhat ;
+ elif test -f /etc/fedora-release ; then
+ VENDOR=fedora ;
+ elif test -f /etc/arch-release ; then
+ VENDOR=arch ;
+ elif test -f /etc/lsb-release ; then
+ VENDOR=ubuntu ;
+ elif test -f /etc/debian_version ; then
+ VENDOR=debian ;
+ elif test -f /etc/SuSE-release ; then
+ VENDOR=sles ;
+ elif test -f /etc/slackware-version ; then
+ VENDOR=slackware ;
+ elif test -f /etc/gentoo-release ; then
+ VENDOR=gentoo ;
+ else
+ VENDOR= ;
+ fi
+ AC_MSG_RESULT([$VENDOR])
+ AC_SUBST(VENDOR)
+
+ AC_MSG_CHECKING([default package type])
+ case "$VENDOR" in
+ fedora) DEFAULT_PACKAGE=rpm ;;
+ redhat) DEFAULT_PACKAGE=rpm ;;
+ sles) DEFAULT_PACKAGE=rpm ;;
+ ubuntu) DEFAULT_PACKAGE=deb ;;
+ debian) DEFAULT_PACKAGE=deb ;;
+ slackware) DEFAULT_PACKAGE=tgz ;;
+ arch) DEFAULT_PACKAGE=arch;;
+ *) DEFAULT_PACKAGE=rpm ;;
+ esac
+
+ AC_MSG_RESULT([$DEFAULT_PACKAGE])
+ AC_SUBST(DEFAULT_PACKAGE)
+])
+
+dnl #
+dnl # Default SPL user configuration
+dnl #
+AC_DEFUN([SPL_AC_PACKAGE], [
+ SPL_AC_DEFAULT_PACKAGE
+ SPL_AC_RPM
+ SPL_AC_DPKG
+ SPL_AC_ALIEN
+
+ AS_IF([test "$VENDOR" = "arch"], [SPL_AC_PACMAN])
])
AC_DEFUN([SPL_AC_LICENSE], [
- AC_MSG_CHECKING([license])
- AC_MSG_RESULT([GPL])
+ AC_MSG_CHECKING([spl license])
+ LICENSE=GPL
+ AC_MSG_RESULT([$LICENSE])
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DHAVE_GPL_ONLY_SYMBOLS"
+ AC_SUBST(LICENSE)
+])
+
+AC_DEFUN([SPL_AC_CONFIG], [
+ SPL_CONFIG=all
+ AC_ARG_WITH([config],
+ AS_HELP_STRING([--with-config=CONFIG],
+ [Config file 'kernel|user|all|srpm']),
+ [SPL_CONFIG="$withval"])
+
+ AC_MSG_CHECKING([spl config])
+ AC_MSG_RESULT([$SPL_CONFIG]);
+ AC_SUBST(SPL_CONFIG)
+
+ case "$SPL_CONFIG" in
+ kernel) SPL_AC_CONFIG_KERNEL ;;
+ user) SPL_AC_CONFIG_USER ;;
+ all) SPL_AC_CONFIG_KERNEL
+ SPL_AC_CONFIG_USER ;;
+ srpm) ;;
+ *)
+ AC_MSG_RESULT([Error!])
+ AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
+ user kernel|user|all|srpm]) ;;
+ esac
+
+ AM_CONDITIONAL([CONFIG_USER],
+ [test "$SPL_CONFIG" = user] ||
+ [test "$SPL_CONFIG" = all])
+ AM_CONDITIONAL([CONFIG_KERNEL],
+ [test "$SPL_CONFIG" = kernel] ||
+ [test "$SPL_CONFIG" = all])
])
+dnl #
+dnl # Enable if the SPL should be compiled with internal debugging enabled.
+dnl # By default this support is disabled.
+dnl #
AC_DEFUN([SPL_AC_DEBUG], [
AC_MSG_CHECKING([whether debugging is enabled])
- AC_ARG_ENABLE( [debug],
- AS_HELP_STRING([--enable-debug],
- [Enable generic debug support (default off)]),
- [ case "$enableval" in
- yes) spl_ac_debug=yes ;;
- no) spl_ac_debug=no ;;
- *) AC_MSG_RESULT([Error!])
- AC_MSG_ERROR([Bad value "$enableval" for --enable-debug]) ;;
- esac ]
- )
- if test "$spl_ac_debug" = yes; then
- AC_MSG_RESULT([yes])
- KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG"
- else
- AC_MSG_RESULT([no])
+ AC_ARG_ENABLE([debug],
+ [AS_HELP_STRING([--enable-debug],
+ [Enable generic debug support @<:@default=no@:>@])],
+ [],
+ [enable_debug=no])
+
+ AS_IF([test "x$enable_debug" = xyes],
+ [
+ KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
+ DEBUG_CFLAGS="-DDEBUG -Werror"
+ DEBUG_SPL="_with_debug"
+ ], [
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
- fi
+ DEBUG_CFLAGS="-DNDEBUG"
+ DEBUG_SPL="_without_debug"
+ ])
+
+ AC_SUBST(DEBUG_CFLAGS)
+ AC_SUBST(DEBUG_SPL)
+ AC_MSG_RESULT([$enable_debug])
+])
+
+dnl #
+dnl # Enabled by default it provides a basic debug log infrastructure.
+dnl # Each subsystem registers itself with a name and logs messages
+dnl # using predefined types. If the debug mask it set to allow the
+dnl # message type it will be written to the internal log. The log
+dnl # can be dumped to a file by echoing 1 to the 'dump' proc entry,
+dnl # after dumping the log it must be decoded using the spl utility.
+dnl #
+dnl # echo 1 >/proc/sys/kernel/spl/debug/dump
+dnl # spl /tmp/spl-log.xxx.yyy /tmp/spl-log.xxx.yyy.txt
+dnl #
+AC_DEFUN([SPL_AC_DEBUG_LOG], [
+ AC_ARG_ENABLE([debug-log],
+ [AS_HELP_STRING([--enable-debug-log],
+ [Enable basic debug logging @<:@default=yes@:>@])],
+ [],
+ [enable_debug_log=yes])
+
+ AS_IF([test "x$enable_debug_log" = xyes],
+ [
+ KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_LOG"
+ DEBUG_LOG="_with_debug_log"
+ AC_DEFINE([DEBUG_LOG], [1],
+ [Define to 1 to enable basic debug logging])
+ ], [
+ DEBUG_LOG="_without_debug_log"
+ ])
+
+ AC_SUBST(DEBUG_LOG)
+ AC_MSG_CHECKING([whether basic debug logging is enabled])
+ AC_MSG_RESULT([$enable_debug_log])
])
+dnl #
+dnl # Enabled by default it provides a minimal level of memory tracking.
+dnl # A total count of bytes allocated is kept for each alloc and free.
+dnl # Then at module unload time a report to the console will be printed
+dnl # if memory was leaked. Additionally, /proc/spl/kmem/slab will exist
+dnl # and provide an easy way to inspect the kmem based slab.
+dnl #
AC_DEFUN([SPL_AC_DEBUG_KMEM], [
- AC_MSG_CHECKING([whether kmem debugging is enabled])
- AC_ARG_ENABLE( [debug-kmem],
- AS_HELP_STRING([--enable-debug-kmem],
- [Enable kmem debug support (default off)]),
- [ case "$enableval" in
- yes) spl_ac_debug_kmem=yes ;;
- no) spl_ac_debug_kmem=no ;;
- *) AC_MSG_RESULT([Error!])
- AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kmem]) ;;
- esac ]
- )
- if test "$spl_ac_debug_kmem" = yes; then
- AC_MSG_RESULT([yes])
- AC_DEFINE([DEBUG_KMEM], [1],
- [Define to 1 to enable kmem debugging])
+ AC_ARG_ENABLE([debug-kmem],
+ [AS_HELP_STRING([--enable-debug-kmem],
+ [Enable basic kmem accounting @<:@default=yes@:>@])],
+ [],
+ [enable_debug_kmem=yes])
+
+ AS_IF([test "x$enable_debug_kmem" = xyes],
+ [
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
- else
- AC_MSG_RESULT([no])
- fi
-])
+ DEBUG_KMEM="_with_debug_kmem"
+ AC_DEFINE([DEBUG_KMEM], [1],
+ [Define to 1 to enable basic kmem accounting])
+ ], [
+ DEBUG_KMEM="_without_debug_kmem"
+ ])
-AC_DEFUN([SPL_AC_DEBUG_MUTEX], [
- AC_MSG_CHECKING([whether mutex debugging is enabled])
- AC_ARG_ENABLE( [debug-mutex],
- AS_HELP_STRING([--enable-debug-mutex],
- [Enable mutex debug support (default off)]),
- [ case "$enableval" in
- yes) spl_ac_debug_mutex=yes ;;
- no) spl_ac_debug_mutex=no ;;
- *) AC_MSG_RESULT([Error!])
- AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-mutex]) ;;
- esac ]
- )
- if test "$spl_ac_debug_mutex" = yes; then
- AC_MSG_RESULT([yes])
- AC_DEFINE([DEBUG_MUTEX], [1],
- [Define to 1 to enable mutex debugging])
- KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_MUTEX"
- else
- AC_MSG_RESULT([no])
- fi
+ AC_SUBST(DEBUG_KMEM)
+ AC_MSG_CHECKING([whether basic kmem accounting is enabled])
+ AC_MSG_RESULT([$enable_debug_kmem])
])
-AC_DEFUN([SPL_AC_DEBUG_KSTAT], [
- AC_MSG_CHECKING([whether kstat debugging is enabled])
- AC_ARG_ENABLE( [debug-kstat],
- AS_HELP_STRING([--enable-debug-kstat],
- [Enable kstat debug support (default off)]),
- [ case "$enableval" in
- yes) spl_ac_debug_kstat=yes ;;
- no) spl_ac_debug_kstat=no ;;
- *) AC_MSG_RESULT([Error!])
- AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kstat]) ;;
- esac ]
- )
- if test "$spl_ac_debug_kstat" = yes; then
- AC_MSG_RESULT([yes])
- AC_DEFINE([DEBUG_KSTAT], [1],
- [Define to 1 to enable kstat debugging])
- KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KSTAT"
- else
- AC_MSG_RESULT([no])
- fi
-])
+dnl #
+dnl # Disabled by default it provides detailed memory tracking. This
+dnl # feature also requires --enable-debug-kmem to be set. When enabled
+dnl # not only will total bytes be tracked but also the location of every
+dnl # alloc and free. When the SPL module is unloaded a list of all leaked
+dnl # addresses and where they were allocated will be dumped to the console.
+dnl # Enabling this feature has a significant impact on performance but it
+dnl # makes finding memory leaks pretty straight forward.
+dnl #
+AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
+ AC_ARG_ENABLE([debug-kmem-tracking],
+ [AS_HELP_STRING([--enable-debug-kmem-tracking],
+ [Enable detailed kmem tracking @<:@default=no@:>@])],
+ [],
+ [enable_debug_kmem_tracking=no])
-AC_DEFUN([SPL_AC_DEBUG_CALLB], [
- AC_MSG_CHECKING([whether callb debugging is enabled])
- AC_ARG_ENABLE( [debug-callb],
- AS_HELP_STRING([--enable-debug-callb],
- [Enable callb debug support (default off)]),
- [ case "$enableval" in
- yes) spl_ac_debug_callb=yes ;;
- no) spl_ac_debug_callb=no ;;
- *) AC_MSG_RESULT([Error!])
- AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-callb]) ;;
- esac ]
- )
- if test "$spl_ac_debug_callb" = yes; then
- AC_MSG_RESULT([yes])
- AC_DEFINE([DEBUG_CALLB], [1],
- [Define to 1 to enable callb debugging])
- KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_CALLB"
- else
- AC_MSG_RESULT([no])
- fi
+ AS_IF([test "x$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 >conftest.c <<_ACEOF
+cat confdefs.h - <<_ACEOF >conftest.c
$1
_ACEOF
])
dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
dnl #
AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
-m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])dnl
-rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
-echo "obj-m := conftest.o" >build/Makefile
-dnl AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" -f $PWD/build/Makefile LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM SUBDIRS=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
-AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
- [$4],
- [_AC_MSG_LOG_CONFTEST
-m4_ifvaln([$5],[$5])dnl])dnl
-rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.ko m4_ifval([$1], [build/conftest.c conftest.c])[]dnl
+ m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])
+ rm -Rf build && mkdir -p build
+ echo "obj-m := conftest.o" >build/Makefile
+ AS_IF(
+ [AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
+ [$4],
+ [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
+ )
+ rm -Rf build
])
dnl #
AC_DEFUN([SPL_LINUX_CONFIG],
[AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
SPL_LINUX_TRY_COMPILE([
- #ifndef AUTOCONF_INCLUDED
- #include <linux/config.h>
- #endif
+ #include <linux/module.h>
],[
#ifndef CONFIG_$1
#error CONFIG_$1 not #defined
dnl #
AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT],
[AC_MSG_CHECKING([whether symbol $1 is exported])
- grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/Module.symvers 2>/dev/null
+ 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/$file" 2>/dev/null
+ grep -q -E "EXPORT_SYMBOL.*($1)" \
+ "$LINUX_OBJ/$file" 2>/dev/null
rc=$?
if test $rc -eq 0; then
export=1
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_$2_HEADER
])
])
+dnl #
+dnl # Use the atomic implemenation based on global spinlocks. This
+dnl # should only be needed by 32-bit kernels which do not provide
+dnl # the atomic64_* API. It may be optionally enabled as a fallback
+dnl # if problems are observed with the direct mapping to the native
+dnl # Linux atomic operations. You may not disable atomic spinlocks
+dnl # if you kernel does not an atomic64_* API.
+dnl #
+AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
+ AC_ARG_ENABLE([atomic-spinlocks],
+ [AS_HELP_STRING([--enable-atomic-spinlocks],
+ [Atomic types use spinlocks @<:@default=check@:>@])],
+ [],
+ [enable_atomic_spinlocks=check])
+
+ SPL_LINUX_TRY_COMPILE([
+ #include <asm/atomic.h>
+ ],[
+ atomic64_t *ptr __attribute__ ((unused));
+ ],[
+ have_atomic64_t=yes
+ AC_DEFINE(HAVE_ATOMIC64_T, 1,
+ [kernel defines atomic64_t])
+ ],[
+ have_atomic64_t=no
+ ])
+
+ AS_IF([test "x$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])
+])
+
dnl #
dnl # 2.6.24 API change,
-dnl # check if uintptr_t typedef is defined
+dnl # check if atomic64_cmpxchg is defined
dnl #
-AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
- [AC_MSG_CHECKING([whether kernel defines uintptr_t])
+AC_DEFUN([SPL_AC_TYPE_ATOMIC64_CMPXCHG],
+ [AC_MSG_CHECKING([whether kernel defines atomic64_cmpxchg])
SPL_LINUX_TRY_COMPILE([
- #include <linux/types.h>
+ #include <asm/atomic.h>
+ #include <asm/system.h>
],[
- uintptr_t *ptr;
+ atomic64_cmpxchg((atomic64_t *)NULL, 0, 0);
],[
AC_MSG_RESULT([yes])
- AC_DEFINE(HAVE_UINTPTR_T, 1,
- [kernel defines uintptr_t])
+ AC_DEFINE(HAVE_ATOMIC64_CMPXCHG, 1,
+ [kernel defines atomic64_cmpxchg])
],[
AC_MSG_RESULT([no])
])
])
dnl #
-dnl # 2.6.x API change,
-dnl # check if atomic64_t typedef is defined
+dnl # 2.6.24 API change,
+dnl # check if atomic64_xchg is defined
dnl #
-AC_DEFUN([SPL_AC_TYPE_ATOMIC64_T],
- [AC_MSG_CHECKING([whether kernel defines atomic64_t])
+AC_DEFUN([SPL_AC_TYPE_ATOMIC64_XCHG],
+ [AC_MSG_CHECKING([whether kernel defines atomic64_xchg])
SPL_LINUX_TRY_COMPILE([
#include <asm/atomic.h>
],[
- atomic64_t *ptr;
+ atomic64_xchg((atomic64_t *)NULL, 0);
],[
AC_MSG_RESULT([yes])
- AC_DEFINE(HAVE_ATOMIC64_T, 1,
- [kernel defines atomic64_t])
+ AC_DEFINE(HAVE_ATOMIC64_XCHG, 1,
+ [kernel defines atomic64_xchg])
+ ],[
+ AC_MSG_RESULT([no])
+ ])
+])
+
+dnl #
+dnl # 2.6.24 API change,
+dnl # check if uintptr_t typedef is defined
+dnl #
+AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
+ [AC_MSG_CHECKING([whether kernel defines uintptr_t])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/types.h>
+ ],[
+ uintptr_t *ptr __attribute__ ((unused));
+ ],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_UINTPTR_T, 1,
+ [kernel defines uintptr_t])
],[
AC_MSG_RESULT([no])
])
SPL_LINUX_TRY_COMPILE([
#include <linux/workqueue.h>
],[
- struct work_struct work;
+ struct work_struct work __attribute__ ((unused));
INIT_WORK(&work, NULL, NULL);
],[
AC_MSG_RESULT(yes)
SPL_LINUX_TRY_COMPILE([
#include <linux/sysctl.h>
],[
- return register_sysctl_table(NULL,0);
+ (void) register_sysctl_table(NULL, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
])
])
+dnl #
+dnl # 2.6.35 API change,
+dnl # Add context to shrinker callback
+dnl #
+AC_DEFUN([SPL_AC_3ARGS_SHRINKER_CALLBACK],
+ [AC_MSG_CHECKING([whether shrinker callback wants 3 args])
+ tmp_flags="$EXTRA_KCFLAGS"
+ EXTRA_KCFLAGS="-Werror"
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+
+ int shrinker_cb(struct shrinker *, int, unsigned int);
+ ],[
+ 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,
+ [shrinker callback wants 3 args])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+ EXTRA_KCFLAGS="$tmp_flags"
+])
+
dnl #
dnl # 2.6.25 API change,
dnl # struct path entry added to struct nameidata
SPL_LINUX_TRY_COMPILE([
#include <linux/namei.h>
],[
- struct nameidata nd;
+ struct nameidata nd __attribute__ ((unused));
nd.path.mnt = NULL;
nd.path.dentry = NULL;
])
])
+dnl #
+dnl # 2.6.33 API change,
+dnl # Removed .ctl_name from struct ctl_table.
+dnl #
+AC_DEFUN([SPL_AC_CTL_NAME], [
+ AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/sysctl.h>
+ ],[
+ struct ctl_table ctl __attribute__ ((unused));
+ ctl.ctl_name = 0;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_CTL_NAME, 1, [struct ctl_table has ctl_name])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
dnl #
dnl # 2.6.16 API change.
dnl # Check if 'fls64()' is available
[])
])
+dnl #
+dnl # 2.6.27 API change,
+dnl # device_create() uses 5 args, new 'drvdata' argument.
+dnl #
+AC_DEFUN([SPL_AC_5ARGS_DEVICE_CREATE], [
+ AC_MSG_CHECKING([whether device_create() wants 5 args])
+ tmp_flags="$EXTRA_KCFLAGS"
+ EXTRA_KCFLAGS="-Werror"
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/device.h>
+ ],[
+ device_create(NULL, NULL, 0, NULL, "%d", 1);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_5ARGS_DEVICE_CREATE, 1,
+ [device_create wants 5 args])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+ EXTRA_KCFLAGS="$tmp_flags"
+])
+
dnl #
dnl # 2.6.13 API change, check whether class_device_create() is available.
dnl # Class_device_create() was introduced in 2.6.13 and depricated
SPL_LINUX_TRY_COMPILE([
#include <linux/time.h>
],[
- struct timespec a, b, c = { 0 };
+ struct timespec a = { 0 };
+ struct timespec b = { 0 };
+ struct timespec c __attribute__ ((unused));
c = timespec_sub(a, b);
],[
AC_MSG_RESULT(yes)
SPL_LINUX_TRY_COMPILE([
#include <linux/utsname.h>
],[
- struct new_utsname *a = init_utsname();
+ struct new_utsname *a __attribute__ ((unused));
+ a = init_utsname();
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INIT_UTSNAME, 1, [init_utsname() is available])
#endif
],[
struct files_struct *files = current->files;
- struct fdtable *fdt = files_fdtable(files);
+ struct fdtable *fdt __attribute__ ((unused));
+ fdt = files_fdtable(files);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FILES_FDTABLE, 1, [files_fdtable() is available])
SPL_LINUX_TRY_COMPILE([
#include <linux/slab.h>
],[
- void *a = kmalloc_node(1, GFP_KERNEL, 0);
+ void *a __attribute__ ((unused));
+ a = kmalloc_node(1, GFP_KERNEL, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KMALLOC_NODE, 1, [kmalloc_node() is available])
])
dnl #
-dnl # 2.6.14 API change,
-dnl # check whether 'div64_64()' is available
+dnl # 2.6.29 API change,
+dnl # Adaptive mutexs introduced.
dnl #
-AC_DEFUN([SPL_AC_DIV64_64], [
- AC_MSG_CHECKING([whether div64_64() is available])
+AC_DEFUN([SPL_AC_MUTEX_OWNER], [
+ AC_MSG_CHECKING([whether struct mutex has owner])
SPL_LINUX_TRY_COMPILE([
- #include <asm/div64.h>
- #include <linux/types.h>
+ #include <linux/mutex.h>
+ ],[
+ struct mutex mtx __attribute__ ((unused));
+ mtx.owner = NULL;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_MUTEX_OWNER, 1, [struct mutex has owner])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # 2.6.39 API change,
+dnl # Owner type change. A Linux mutex prior to 2.6.39 would store
+dnl # the owner as a thread_info pointer when CONFIG_DEBUG_MUTEXES
+dnl # was defined. As of 2.6.39 this was changed to a task_struct
+dnl # pointer which frankly makes a lot more sense.
+dnl #
+AC_DEFUN([SPL_AC_MUTEX_OWNER_TASK_STRUCT], [
+ AC_MSG_CHECKING([whether struct mutex owner is a task_struct])
+ tmp_flags="$EXTRA_KCFLAGS"
+ EXTRA_KCFLAGS="-Werror"
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mutex.h>
+ ],[
+ struct mutex mtx __attribute__ ((unused));
+ mtx.owner = current;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_MUTEX_OWNER_TASK_STRUCT, 1,
+ [struct mutex owner is a task_struct])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+ EXTRA_KCFLAGS="$tmp_flags"
+])
+
+dnl #
+dnl # 2.6.18 API change,
+dnl # First introduced 'mutex_lock_nested()' in include/linux/mutex.h,
+dnl # as part of the mutex validator. Fallback to using 'mutex_lock()'
+dnl # if the mutex validator is disabled or otherwise unavailable.
+dnl #
+AC_DEFUN([SPL_AC_MUTEX_LOCK_NESTED], [
+ AC_MSG_CHECKING([whether mutex_lock_nested() is available])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mutex.h>
+ ],[
+ struct mutex mutex;
+ mutex_init(&mutex);
+ mutex_lock_nested(&mutex, 0);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_MUTEX_LOCK_NESTED, 1,
+ [mutex_lock_nested() is available])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # 2.6.27 API change,
+dnl # on_each_cpu() uses 3 args, no 'retry' argument
+dnl #
+AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
+ AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/smp.h>
+ ],[
+ on_each_cpu(NULL, NULL, 0);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,
+ [on_each_cpu wants 3 args])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # 2.6.18 API change,
+dnl # kallsyms_lookup_name no longer exported
+dnl #
+AC_DEFUN([SPL_AC_KALLSYMS_LOOKUP_NAME], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [kallsyms_lookup_name],
+ [],
+ [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
+ [kallsyms_lookup_name() is available])],
+ [])
+])
+
+dnl #
+dnl # Proposed API change,
+dnl # This symbol is not available in stock kernels. You may build a
+dnl # custom kernel with the *-spl-export-symbols.patch which will export
+dnl # these symbols for use. If your already rolling a custom kernel for
+dnl # your environment this is recommended.
+dnl #
+AC_DEFUN([SPL_AC_GET_VMALLOC_INFO], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [get_vmalloc_info],
+ [],
+ [AC_DEFINE(HAVE_GET_VMALLOC_INFO, 1,
+ [get_vmalloc_info() is available])],
+ [])
+])
+
+dnl #
+dnl # 2.6.17 API change
+dnl # The helper functions first_online_pgdat(), next_online_pgdat(), and
+dnl # next_zone() are introduced to simplify for_each_zone(). These symbols
+dnl # were exported in 2.6.17 for use by modules which was consistent with
+dnl # the previous implementation of for_each_zone(). From 2.6.18 - 2.6.19
+dnl # the symbols were exported as 'unused', and by 2.6.20 they exports
+dnl # were dropped entirely leaving modules no way to directly iterate over
+dnl # the zone list. Because we need access to the zone helpers we check
+dnl # if the kernel contains the old or new implementation. Then we check
+dnl # to see if the symbols we need for each version are available. If they
+dnl # are not, dynamically aquire the addresses with kallsyms_lookup_name().
+dnl #
+AC_DEFUN([SPL_AC_PGDAT_HELPERS], [
+ AC_MSG_CHECKING([whether symbol *_pgdat exist])
+ grep -q -E 'first_online_pgdat' $LINUX/include/linux/mmzone.h 2>/dev/null
+ rc=$?
+ if test $rc -eq 0; then
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_PGDAT_HELPERS, 1, [pgdat helpers are available])
+ else
+ AC_MSG_RESULT([no])
+ fi
+])
+
+dnl #
+dnl # Proposed API change,
+dnl # This symbol is not available in stock kernels. You may build a
+dnl # custom kernel with the *-spl-export-symbols.patch which will export
+dnl # these symbols for use. If your already rolling a custom kernel for
+dnl # your environment this is recommended.
+dnl #
+AC_DEFUN([SPL_AC_FIRST_ONLINE_PGDAT], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [first_online_pgdat],
+ [],
+ [AC_DEFINE(HAVE_FIRST_ONLINE_PGDAT, 1,
+ [first_online_pgdat() is available])],
+ [])
+])
+
+dnl #
+dnl # Proposed API change,
+dnl # This symbol is not available in stock kernels. You may build a
+dnl # custom kernel with the *-spl-export-symbols.patch which will export
+dnl # these symbols for use. If your already rolling a custom kernel for
+dnl # your environment this is recommended.
+dnl #
+AC_DEFUN([SPL_AC_NEXT_ONLINE_PGDAT], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [next_online_pgdat],
+ [],
+ [AC_DEFINE(HAVE_NEXT_ONLINE_PGDAT, 1,
+ [next_online_pgdat() is available])],
+ [])
+])
+
+dnl #
+dnl # Proposed API change,
+dnl # This symbol is not available in stock kernels. You may build a
+dnl # custom kernel with the *-spl-export-symbols.patch which will export
+dnl # these symbols for use. If your already rolling a custom kernel for
+dnl # your environment this is recommended.
+dnl #
+AC_DEFUN([SPL_AC_NEXT_ZONE], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [next_zone],
+ [],
+ [AC_DEFINE(HAVE_NEXT_ZONE, 1,
+ [next_zone() is available])],
+ [])
+])
+
+dnl #
+dnl # 2.6.17 API change,
+dnl # See SPL_AC_PGDAT_HELPERS for details.
+dnl #
+AC_DEFUN([SPL_AC_PGDAT_LIST], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [pgdat_list],
+ [],
+ [AC_DEFINE(HAVE_PGDAT_LIST, 1,
+ [pgdat_list is available])],
+ [])
+])
+
+dnl #
+dnl # 2.6.18 API change,
+dnl # First introduced global_page_state() support as an inline.
+dnl #
+AC_DEFUN([SPL_AC_GLOBAL_PAGE_STATE], [
+ AC_MSG_CHECKING([whether global_page_state() is available])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ ],[
+ unsigned long state __attribute__ ((unused));
+ state = global_page_state(0);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_GLOBAL_PAGE_STATE, 1,
+ [global_page_state() is available])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # 2.6.21 API change (plus subsequent naming convention changes),
+dnl # Public global zone stats now include a free page count. However
+dnl # the enumerated names of the counters have changed since this API
+dnl # was introduced. We need to deduce the corrent name to use. This
+dnl # replaces the priviate get_zone_counts() interface.
+dnl #
+dnl # NR_FREE_PAGES was available from 2.6.21 to current kernels, which
+dnl # is 2.6.30 as of when this was written.
+dnl #
+AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_FREE], [
+ AC_MSG_CHECKING([whether page state NR_FREE_PAGES is available])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ ],[
+ enum zone_stat_item zsi __attribute__ ((unused));
+ zsi = NR_FREE_PAGES;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES, 1,
+ [Page state NR_FREE_PAGES is available])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # 2.6.21 API change (plus subsequent naming convention changes),
+dnl # Public global zone stats now include an inactive page count. However
+dnl # the enumerated names of the counters have changed since this API
+dnl # was introduced. We need to deduce the corrent name to use. This
+dnl # replaces the priviate get_zone_counts() interface.
+dnl #
+dnl # NR_INACTIVE was available from 2.6.21 to 2.6.27 and included both
+dnl # anonymous and file inactive pages. As of 2.6.28 it was split in
+dnl # to NR_INACTIVE_ANON and NR_INACTIVE_FILE.
+dnl #
+AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_INACTIVE], [
+ AC_MSG_CHECKING([whether page state NR_INACTIVE is available])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ ],[
+ enum zone_stat_item zsi __attribute__ ((unused));
+ zsi = NR_INACTIVE;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE, 1,
+ [Page state NR_INACTIVE is available])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+
+ AC_MSG_CHECKING([whether page state NR_INACTIVE_ANON is available])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ ],[
+ enum zone_stat_item zsi __attribute__ ((unused));
+ zsi = NR_INACTIVE_ANON;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON, 1,
+ [Page state NR_INACTIVE_ANON is available])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+
+ AC_MSG_CHECKING([whether page state NR_INACTIVE_FILE is available])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ ],[
+ enum zone_stat_item zsi __attribute__ ((unused));
+ zsi = NR_INACTIVE_FILE;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE, 1,
+ [Page state NR_INACTIVE_FILE is available])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # 2.6.21 API change (plus subsequent naming convention changes),
+dnl # Public global zone stats now include an active page count. However
+dnl # the enumerated names of the counters have changed since this API
+dnl # was introduced. We need to deduce the corrent name to use. This
+dnl # replaces the priviate get_zone_counts() interface.
+dnl #
+dnl # NR_ACTIVE was available from 2.6.21 to 2.6.27 and included both
+dnl # anonymous and file active pages. As of 2.6.28 it was split in
+dnl # to NR_ACTIVE_ANON and NR_ACTIVE_FILE.
+dnl #
+AC_DEFUN([SPL_AC_ZONE_STAT_ITEM_ACTIVE], [
+ AC_MSG_CHECKING([whether page state NR_ACTIVE is available])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ ],[
+ enum zone_stat_item zsi __attribute__ ((unused));
+ zsi = NR_ACTIVE;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE, 1,
+ [Page state NR_ACTIVE is available])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+
+ AC_MSG_CHECKING([whether page state NR_ACTIVE_ANON is available])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ ],[
+ enum zone_stat_item zsi __attribute__ ((unused));
+ zsi = NR_ACTIVE_ANON;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON, 1,
+ [Page state NR_ACTIVE_ANON is available])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+
+ AC_MSG_CHECKING([whether page state NR_ACTIVE_FILE is available])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+ ],[
+ enum zone_stat_item zsi __attribute__ ((unused));
+ zsi = NR_ACTIVE_FILE;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE, 1,
+ [Page state NR_ACTIVE_FILE is available])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # Proposed API change for legacy kernels.
+dnl # This symbol is not available in older kernels. For kernels post
+dnl # 2.6.21 the global_page_state() API is used to get free/inactive/active
+dnl # page state information. This symbol is only used in legacy kernels
+dnl # any only as a last resort.
+dnl
+AC_DEFUN([SPL_AC_GET_ZONE_COUNTS], [
+ AC_MSG_CHECKING([whether symbol get_zone_counts is needed])
+ SPL_LINUX_TRY_COMPILE([
+ ],[
+ #if !defined(HAVE_ZONE_STAT_ITEM_NR_FREE_PAGES)
+ #error "global_page_state needs NR_FREE_PAGES"
+ #endif
+
+ #if !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE) && \
+ !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_ANON) && \
+ !defined(HAVE_ZONE_STAT_ITEM_NR_ACTIVE_FILE)
+ #error "global_page_state needs NR_ACTIVE*"
+ #endif
+
+ #if !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE) && \
+ !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_ANON) && \
+ !defined(HAVE_ZONE_STAT_ITEM_NR_INACTIVE_FILE)
+ #error "global_page_state needs NR_INACTIVE*"
+ #endif
+ ],[
+ AC_MSG_RESULT(no)
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(NEED_GET_ZONE_COUNTS, 1,
+ [get_zone_counts() is needed])
+
+ SPL_CHECK_SYMBOL_EXPORT(
+ [get_zone_counts],
+ [],
+ [AC_DEFINE(HAVE_GET_ZONE_COUNTS, 1,
+ [get_zone_counts() is available])],
+ [])
+ ])
+])
+
+dnl #
+dnl # 2.6.27 API change,
+dnl # The user_path_dir() replaces __user_walk()
+dnl #
+AC_DEFUN([SPL_AC_USER_PATH_DIR], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [user_path_at],
+ [],
+ [AC_DEFINE(HAVE_USER_PATH_DIR, 1,
+ [user_path_dir() is available])],
+ [])
+])
+
+dnl #
+dnl # Symbol available in RHEL kernels not in stock kernels.
+dnl #
+AC_DEFUN([SPL_AC_SET_FS_PWD], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [set_fs_pwd],
+ [],
+ [AC_DEFINE(HAVE_SET_FS_PWD, 1,
+ [set_fs_pwd() is available])],
+ [])
+])
+
+dnl #
+dnl # 2.6.25 API change,
+dnl # Simplied API by replacing mnt+dentry args with a single path arg.
+dnl #
+AC_DEFUN([SPL_AC_2ARGS_SET_FS_PWD],
+ [AC_MSG_CHECKING([whether set_fs_pwd() wants 2 args])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/sched.h>
+ #include <linux/fs_struct.h>
+ ],[
+ set_fs_pwd(NULL, NULL);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_2ARGS_SET_FS_PWD, 1,
+ [set_fs_pwd() wants 2 args])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # SLES API change, never adopted in mainline,
+dnl # Third 'struct vfsmount *' argument removed.
+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(NULL, NULL);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_2ARGS_VFS_UNLINK, 1,
+ [vfs_unlink() wants 2 args])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # SLES API change, never adopted in mainline,
+dnl # Third and sixth 'struct vfsmount *' argument removed.
+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(NULL, NULL, NULL, NULL);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_4ARGS_VFS_RENAME, 1,
+ [vfs_rename() wants 4 args])
+ ],[
+ AC_MSG_RESULT(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>
+ ],[
+ 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 # 2.6.29 API change,
+dnl # check whether 'struct cred' exists
+dnl #
+AC_DEFUN([SPL_AC_CRED_STRUCT], [
+ AC_MSG_CHECKING([whether struct cred exists])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/cred.h>
+ ],[
+ struct cred *cr __attribute__ ((unused));
+ cr = NULL;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_CRED_STRUCT, 1, [struct cred exists])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # Custom SPL patch may export this symbol.
+dnl #
+AC_DEFUN([SPL_AC_GROUPS_SEARCH], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [groups_search],
+ [],
+ [AC_DEFINE(HAVE_GROUPS_SEARCH, 1,
+ [groups_search() is available])],
+ [])
+])
+
+dnl #
+dnl # 2.6.x API change,
+dnl # __put_task_struct() was exported in RHEL5 but unavailable elsewhere.
+dnl #
+AC_DEFUN([SPL_AC_PUT_TASK_STRUCT], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [__put_task_struct],
+ [],
+ [AC_DEFINE(HAVE_PUT_TASK_STRUCT, 1,
+ [__put_task_struct() is available])],
+ [])
+])
+
+dnl #
+dnl # 2.6.32 API change,
+dnl # Unused 'struct file *' removed from prototype.
+dnl #
+AC_DEFUN([SPL_AC_5ARGS_PROC_HANDLER], [
+ AC_MSG_CHECKING([whether proc_handler() wants 5 args])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/sysctl.h>
+ ],[
+ proc_dostring(NULL, 0, NULL, NULL, NULL);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_5ARGS_PROC_HANDLER, 1,
+ [proc_handler() wants 5 args])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # 2.6.x API change,
+dnl # kvasprintf() function added.
+dnl #
+AC_DEFUN([SPL_AC_KVASPRINTF], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [kvasprintf],
+ [],
+ [AC_DEFINE(HAVE_KVASPRINTF, 1,
+ [kvasprintf() is available])],
+ [])
+])
+
+dnl #
+dnl # 2.6.29 API change,
+dnl # vfs_fsync() funcation added, prior to this use file_fsync().
+dnl #
+AC_DEFUN([SPL_AC_VFS_FSYNC], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [vfs_fsync],
+ [fs/sync.c],
+ [AC_DEFINE(HAVE_VFS_FSYNC, 1, [vfs_fsync() is available])],
+ [])
+])
+
+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 # 2.6.33 API change. Also backported in RHEL5 as of 2.6.18-190.el5.
+dnl # Earlier versions of rwsem_is_locked() were inline and had a race
+dnl # condition. The fixed version is exported as a symbol. The race
+dnl # condition is fixed by acquiring sem->wait_lock, so we must not
+dnl # call that version while holding sem->wait_lock.
+dnl #
+AC_DEFUN([SPL_AC_EXPORTED_RWSEM_IS_LOCKED], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [rwsem_is_locked],
+ [lib/rwsem-spinlock.c],
+ [AC_DEFINE(RWSEM_IS_LOCKED_TAKES_WAIT_LOCK, 1,
+ [rwsem_is_locked() acquires sem->wait_lock])],
+ [])
+])
+
+dnl #
+dnl # 2.6.37 API compat,
+dnl # The function invalidate_inodes() is no longer exported by the kernel.
+dnl # The prototype however is still available which means it is safe
+dnl # to acquire the symbol's address using spl_kallsyms_lookup_name().
+dnl #
+dnl # The Proxmox VE kernel contains a patch which renames the function
+dnl # invalidate_inodes() to invalidate_inodes_check(). In the process
+dnl # it adds a 'check' argument and a '#define invalidate_inodes(x)'
+dnl # compatibility wrapper for legacy callers. Therefore, if either
+dnl # of these functions are exported invalidate_inodes() can be
+dnl # safely used.
+dnl #
+AC_DEFUN([SPL_AC_KERNEL_INVALIDATE_INODES], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [invalidate_inodes],
+ [],
+ [AC_DEFINE(HAVE_INVALIDATE_INODES, 1,
+ [invalidate_inodes() is available])],
+ [])
+ SPL_CHECK_SYMBOL_EXPORT(
+ [invalidate_inodes_check],
+ [],
+ [AC_DEFINE(HAVE_INVALIDATE_INODES_CHECK, 1,
+ [invalidate_inodes_check() is available])],
+ [])
+])
+
+dnl #
+dnl # 2.6.39 API compat,
+dnl # The function invalidate_inodes() now take 2 arguments. The second
+dnl # 'kill_dirty' argument describes how invalidate_inodes() should
+dnl # handle dirty inodes. Only when set will dirty inodes be discarded,
+dnl # otherwise they will be handled as busy.
+dnl #
+dnl # Unfortunately, we don't have access to the invalidate_inodes()
+dnl # prototype so it's not easy to check how many arguments it takes.
+dnl # However, this change was done for the benefit of invalidate_device()
+dnl # which also added an argument. The invalidate_device() symbol does
+dnl # exist in the development headers so if it takes two arguments we
+dnl # can fairly safely infer that invalidate_inodes() takes two arguments
+dnl # as well. See commit 93b270f76e7ef3b81001576860c2701931cdc78b.
+dnl #
+AC_DEFUN([SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES],
+ [AC_MSG_CHECKING([whether invalidate_inodes() wants 2 args])
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/fs.h>
+ ],[
+ return __invalidate_device(NULL, 0);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_2ARGS_INVALIDATE_INODES, 1,
+ [invalidate_inodes() wants 2 args])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
+dnl #
+dnl # 2.6.xx API compat,
+dnl # There currently exists no exposed API to partially shrink the dcache.
+dnl # The expected mechanism to shrink the cache is a registered shrinker
+dnl # which is called during memory pressure.
+dnl #
+AC_DEFUN([SPL_AC_SHRINK_DCACHE_MEMORY], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [shrink_dcache_memory],
+ [fs/dcache.c],
+ [AC_DEFINE(HAVE_SHRINK_DCACHE_MEMORY, 1,
+ [shrink_dcache_memory() is available])],
+ [])
+])
+
+dnl #
+dnl # 2.6.xx API compat,
+dnl # There currently exists no exposed API to partially shrink the icache.
+dnl # The expected mechanism to shrink the cache is a registered shrinker
+dnl # which is called during memory pressure.
+dnl #
+AC_DEFUN([SPL_AC_SHRINK_ICACHE_MEMORY], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [shrink_icache_memory],
+ [fs/inode.c],
+ [AC_DEFINE(HAVE_SHRINK_ICACHE_MEMORY, 1,
+ [shrink_icache_memory() is available])],
+ [])
+])
+
+dnl #
+dnl # 2.6.39 API compat,
+dnl # The path_lookup() function has been renamed to kern_path_parent()
+dnl # and the flags argument has been removed. The only behavior now
+dnl # offered is that of LOOKUP_PARENT. The spl already always passed
+dnl # this flag so dropping the flag does not impact us.
+dnl #
+AC_DEFUN([SPL_AC_KERN_PATH_PARENT_HEADER], [
+ SPL_CHECK_SYMBOL_HEADER(
+ [kern_path_parent],
+ [int kern_path_parent(const char \*, struct nameidata \*)],
+ [include/linux/namei.h],
+ [AC_DEFINE(HAVE_KERN_PATH_PARENT_HEADER, 1,
+ [kern_path_parent() is available])],
+ [])
+])
+
+dnl #
+dnl # 3.1 API compat,
+dnl # The kern_path_parent() symbol is no longer exported by the kernel.
+dnl # However, it remains the prefered interface and since we still have
+dnl # access to the prototype we dynamically lookup the required address.
+dnl #
+AC_DEFUN([SPL_AC_KERN_PATH_PARENT_SYMBOL], [
+ SPL_CHECK_SYMBOL_EXPORT(
+ [kern_path_parent],
+ [fs/namei.c],
+ [AC_DEFINE(HAVE_KERN_PATH_PARENT_SYMBOL, 1,
+ [kern_path_parent() is available])],
+ [])
+])
+
+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>
],[
- uint64_t i = div64_64(1ULL, 1ULL);
+ 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(HAVE_DIV64_64, 1, [div64_64() is available])
+ 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"
])
projects / mirror_spl.git / blobdiff