AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_KERNEL
-
- dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
- dnl # compiler options are added by the kernel build system.
- abs_srcdir=`readlink -f ${srcdir}`
- KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
- KERNELCPPFLAGS="$KERNELCPPFLAGS -I${abs_srcdir}/include"
- KERNELCPPFLAGS="$KERNELCPPFLAGS -include ${abs_srcdir}/spl_config.h"
+ SPL_AC_KERNEL_CONFIG
if test "${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_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_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_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_3ARGS_FILE_FSYNC
+ 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], [
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_CHECKING([kernel source directory])
if test -z "$kernelsrc"; then
- headersdir="/lib/modules/$(uname -r)/build"
- if test -e "$headersdir"; then
+ if test -e "/lib/modules/$(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/* \
AC_MSG_RESULT([$kernelsrc])
AC_MSG_CHECKING([kernel build directory])
if test -z "$kernelbuild"; then
- if test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
+ if test -e "/lib/modules/$(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
SPL_AC_MODULE_SYMVERS
])
-dnl #
-dnl # Explicitly check for gawk, we require it for the the usermode
-dnl # helper. For some reason the standard awk command does not
-dnl # behave correctly when invoked from the usermode helper.
-dnl #
-AC_DEFUN([SPL_AC_GAWK], [
- AS_IF([test "x$AWK" != xgawk], [
- AC_MSG_ERROR([
- *** Required util gawk missing. Please install the required
- *** gawk package for your distribution and try again.])
- ])
+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], [
- SPL_AC_GAWK
-])
+AC_DEFUN([SPL_AC_CONFIG_USER], [])
dnl #
dnl # Check for rpm+rpmbuild to build RPM packages. If these tools
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 # package type for 'make pkg': (rpm | deb | tgz)
dnl #
AC_DEFUN([SPL_AC_DEFAULT_PACKAGE], [
- VENDOR=$(echo $ac_build_alias | cut -f2 -d'-')
+ AC_MSG_CHECKING([linux distribution])
+ if test -f /etc/redhat-release ; then
+ VENDOR=redhat ;
+ elif test -f /etc/fedora-release ; then
+ VENDOR=fedora ;
+ elif test -f /etc/arch-release ; then
+ VENDOR=arch ;
+ elif test -f /etc/lsb-release ; then
+ VENDOR=ubuntu ;
+ elif test -f /etc/debian_version ; then
+ VENDOR=debian ;
+ elif test -f /etc/SuSE-release ; then
+ VENDOR=sles ;
+ elif test -f /etc/slackware-version ; then
+ VENDOR=slackware ;
+ elif test -f /etc/gentoo-release ; then
+ VENDOR=gentoo ;
+ else
+ VENDOR= ;
+ fi
+ AC_MSG_RESULT([$VENDOR])
+ AC_SUBST(VENDOR)
AC_MSG_CHECKING([default package type])
case "$VENDOR" in
ubuntu) DEFAULT_PACKAGE=deb ;;
debian) DEFAULT_PACKAGE=deb ;;
slackware) DEFAULT_PACKAGE=tgz ;;
+ arch) DEFAULT_PACKAGE=arch;;
*) DEFAULT_PACKAGE=rpm ;;
esac
dnl # Default SPL user configuration
dnl #
AC_DEFUN([SPL_AC_PACKAGE], [
+ SPL_AC_DEFAULT_PACKAGE
SPL_AC_RPM
SPL_AC_DPKG
SPL_AC_ALIEN
- SPL_AC_DEFAULT_PACKAGE
+
+ AS_IF([test "$VENDOR" = "arch"], [SPL_AC_PACMAN])
])
AC_DEFUN([SPL_AC_LICENSE], [
[
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
DEBUG_CFLAGS="-DDEBUG -Werror"
- ],
- [
+ DEBUG_SPL="_with_debug"
+ ], [
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
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.
[enable_debug_kmem=yes])
AS_IF([test "x$enable_debug_kmem" = xyes],
- [AC_DEFINE([DEBUG_KMEM], [1],
+ [
+ KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
+ DEBUG_KMEM="_with_debug_kmem"
+ AC_DEFINE([DEBUG_KMEM], [1],
[Define to 1 to enable basic kmem accounting])
- KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"])
+ ], [
+ DEBUG_KMEM="_without_debug_kmem"
+ ])
+ AC_SUBST(DEBUG_KMEM)
AC_MSG_CHECKING([whether basic kmem accounting is enabled])
AC_MSG_RESULT([$enable_debug_kmem])
])
[enable_debug_kmem_tracking=no])
AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
- [AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
+ [
+ KERNELCPPFLAGS="${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])
- KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"])
+ ], [
+ DEBUG_KMEM_TRACKING="_without_debug_kmem_tracking"
+ ])
+ AC_SUBST(DEBUG_KMEM_TRACKING)
AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
AC_MSG_RESULT([$enable_debug_kmem_tracking])
])
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
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_$2_HEADER
SPL_LINUX_TRY_COMPILE([
#include <asm/atomic.h>
],[
- atomic64_t *ptr;
+ atomic64_t *ptr __attribute__ ((unused));
],[
have_atomic64_t=yes
AC_DEFINE(HAVE_ATOMIC64_T, 1,
SPL_LINUX_TRY_COMPILE([
#include <linux/types.h>
],[
- uintptr_t *ptr;
+ uintptr_t *ptr __attribute__ ((unused));
],[
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_UINTPTR_T, 1,
SPL_LINUX_TRY_COMPILE([
#include <linux/workqueue.h>
],[
- struct work_struct work;
+ struct work_struct work __attribute__ ((unused));
INIT_WORK(&work, NULL, NULL);
],[
AC_MSG_RESULT(yes)
SPL_LINUX_TRY_COMPILE([
#include <linux/sysctl.h>
],[
- return register_sysctl_table(NULL,0);
+ (void) register_sysctl_table(NULL, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
])
])
+dnl #
+dnl # 2.6.35 API change,
+dnl # Add context to shrinker callback
+dnl #
+AC_DEFUN([SPL_AC_3ARGS_SHRINKER_CALLBACK],
+ [AC_MSG_CHECKING([whether shrinker callback wants 3 args])
+ tmp_flags="$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;
SPL_LINUX_TRY_COMPILE([
#include <linux/sysctl.h>
],[
- struct ctl_table ctl;
+ struct ctl_table ctl __attribute__ ((unused));
ctl.ctl_name = 0;
],[
AC_MSG_RESULT(yes)
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])
SPL_LINUX_TRY_COMPILE([
#include <linux/mutex.h>
],[
- struct mutex mtx;
+ struct mutex mtx __attribute__ ((unused));
mtx.owner = NULL;
],[
AC_MSG_RESULT(yes)
])
])
+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="$tmp_flags"
+])
+
dnl #
dnl # 2.6.18 API change,
dnl # First introduced 'mutex_lock_nested()' in include/linux/mutex.h,
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
],[
- unsigned long state;
+ unsigned long state __attribute__ ((unused));
state = global_page_state(0);
],[
AC_MSG_RESULT(yes)
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
],[
- enum zone_stat_item zsi;
+ enum zone_stat_item zsi __attribute__ ((unused));
zsi = NR_FREE_PAGES;
],[
AC_MSG_RESULT(yes)
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
],[
- enum zone_stat_item zsi;
+ enum zone_stat_item zsi __attribute__ ((unused));
zsi = NR_INACTIVE;
],[
AC_MSG_RESULT(yes)
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
],[
- enum zone_stat_item zsi;
+ enum zone_stat_item zsi __attribute__ ((unused));
zsi = NR_INACTIVE_ANON;
],[
AC_MSG_RESULT(yes)
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
],[
- enum zone_stat_item zsi;
+ enum zone_stat_item zsi __attribute__ ((unused));
zsi = NR_INACTIVE_FILE;
],[
AC_MSG_RESULT(yes)
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
],[
- enum zone_stat_item zsi;
+ enum zone_stat_item zsi __attribute__ ((unused));
zsi = NR_ACTIVE;
],[
AC_MSG_RESULT(yes)
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
],[
- enum zone_stat_item zsi;
+ enum zone_stat_item zsi __attribute__ ((unused));
zsi = NR_ACTIVE_ANON;
],[
AC_MSG_RESULT(yes)
SPL_LINUX_TRY_COMPILE([
#include <linux/mm.h>
],[
- enum zone_stat_item zsi;
+ enum zone_stat_item zsi __attribute__ ((unused));
zsi = NR_ACTIVE_FILE;
],[
AC_MSG_RESULT(yes)
])
])
+dnl #
+dnl # 2.6.36 API change,
+dnl # The 'struct fs_struct->lock' was changed from a rwlock_t to
+dnl # a spinlock_t to improve the fastpath performance.
+dnl #
+AC_DEFUN([SPL_AC_FS_STRUCT_SPINLOCK], [
+ AC_MSG_CHECKING([whether struct fs_struct uses spinlock_t])
+ tmp_flags="$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
SPL_LINUX_TRY_COMPILE([
#include <linux/cred.h>
],[
- struct cred *cr;
+ struct cred *cr __attribute__ ((unused));
cr = NULL;
],[
AC_MSG_RESULT(yes)
[])
])
+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 prototype.
+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_3ARGS_FILE_FSYNC], [
- AC_MSG_CHECKING([whether file_fsync() wants 3 args])
+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/buffer_head.h>
+ #include <linux/zlib.h>
],[
- file_fsync(NULL, NULL, 0);
+ return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
],[
AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_3ARGS_FILE_FSYNC, 1,
- [file_fsync() wants 3 args])
+ 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"
+])
projects / mirror_spl.git / blobdiff