mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-27 11:29:36 +03:00
2959d94a0a
ZFS works best when it is notified as soon as possible when a device failure occurs. This allows it to immediately start any recovery actions which may be needed. In theory Linux supports a flag which can be set on bio's called FAILFAST which provides this quick notification by disabling the retry logic in the lower scsi layers. That's the theory at least. In practice is turns out that while the flag exists you oddly have to set it with the BIO_RW_AHEAD flag. And even when it's set it you may get retries in the low level drivers decides that's the right behavior, or if you don't get the right error codes reported to the scsi midlayer. Unfortunately, without additional kernels patchs there's not much which can be done to improve this. Basically, this just means that it may take 2-3 minutes before a ZFS is notified properly that a device has failed. This can be improved and I suspect I'll be submitting patches upstream to handle this.
389 lines
10 KiB
Plaintext
389 lines
10 KiB
Plaintext
dnl #
|
|
dnl # Default ZFS kernel configuration
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
|
|
ZFS_AC_KERNEL
|
|
ZFS_AC_SPL
|
|
ZFS_AC_KERNEL_CONFIG
|
|
ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
|
|
ZFS_AC_KERNEL_TYPE_FMODE_T
|
|
ZFS_AC_KERNEL_KOBJ_NAME_LEN
|
|
ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
|
|
ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
|
|
ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
|
|
ZFS_AC_KERNEL_BIO_EMPTY_BARRIER
|
|
ZFS_AC_KERNEL_BIO_FAILFAST
|
|
ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
|
|
ZFS_AC_KERNEL_BIO_RW_SYNCIO
|
|
ZFS_AC_KERNEL_BLK_END_REQUEST
|
|
ZFS_AC_KERNEL_BLK_FETCH_REQUEST
|
|
ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
|
|
ZFS_AC_KERNEL_BLK_RQ_BYTES
|
|
ZFS_AC_KERNEL_BLK_RQ_POS
|
|
ZFS_AC_KERNEL_BLK_RQ_SECTORS
|
|
ZFS_AC_KERNEL_GET_DISK_RO
|
|
ZFS_AC_KERNEL_RQ_IS_SYNC
|
|
ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT
|
|
|
|
if test "$LINUX_OBJ" != "$LINUX"; then
|
|
KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
|
|
fi
|
|
AC_SUBST(KERNELMAKE_PARAMS)
|
|
|
|
|
|
dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
|
|
dnl # compiler options are added by the kernel build system.
|
|
KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
|
|
KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
|
|
|
|
AC_SUBST(KERNELCPPFLAGS)
|
|
])
|
|
|
|
dnl #
|
|
dnl # Detect name used for Module.symvers file in kernel
|
|
dnl #
|
|
AC_DEFUN([ZFS_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 $modpost; then
|
|
LINUX_SYMBOLS=Modules.symvers
|
|
else
|
|
LINUX_SYMBOLS=Module.symvers
|
|
fi
|
|
else
|
|
LINUX_SYMBOLS=NONE
|
|
fi
|
|
AC_MSG_RESULT($LINUX_SYMBOLS)
|
|
AC_SUBST(LINUX_SYMBOLS)
|
|
])
|
|
|
|
dnl #
|
|
dnl # Detect the kernel to be built against
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_KERNEL], [
|
|
AC_ARG_WITH([linux],
|
|
AS_HELP_STRING([--with-linux=PATH],
|
|
[Path to kernel source]),
|
|
[kernelsrc="$withval"])
|
|
|
|
AC_ARG_WITH(linux-obj,
|
|
AS_HELP_STRING([--with-linux-obj=PATH],
|
|
[Path to kernel build objects]),
|
|
[kernelbuild="$withval"])
|
|
|
|
AC_MSG_CHECKING([kernel source directory])
|
|
if test -z "$kernelsrc"; then
|
|
headersdir="/lib/modules/$(uname -r)/build"
|
|
if test -e "$headersdir"; then
|
|
sourcelink=$(readlink -f "$headersdir")
|
|
else
|
|
sourcelink=$(ls -1d /usr/src/kernels/* \
|
|
/usr/src/linux-* \
|
|
2>/dev/null | grep -v obj | tail -1)
|
|
fi
|
|
|
|
if test -n "$sourcelink" && test -e ${sourcelink}; then
|
|
kernelsrc=`readlink -f ${sourcelink}`
|
|
else
|
|
AC_MSG_RESULT([Not found])
|
|
AC_MSG_ERROR([
|
|
*** Please make sure the kernel devel package for your distribution
|
|
*** is installed then try again. If that fails you can specify the
|
|
*** location of the kernel source with the '--with-linux=PATH' option.])
|
|
fi
|
|
else
|
|
if test "$kernelsrc" = "NONE"; then
|
|
kernsrcver=NONE
|
|
fi
|
|
fi
|
|
|
|
AC_MSG_RESULT([$kernelsrc])
|
|
AC_MSG_CHECKING([kernel build directory])
|
|
if test -z "$kernelbuild"; then
|
|
if test -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])
|
|
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 $utsrelease3; then
|
|
utsrelease=generated/utsrelease.h
|
|
fi
|
|
|
|
if test "$utsrelease"; then
|
|
kernsrcver=`(echo "#include <$utsrelease>";
|
|
echo "kernsrcver=UTS_RELEASE") |
|
|
cpp -I $kernelbuild/include |
|
|
grep "^kernsrcver=" | cut -d \" -f 2`
|
|
|
|
if test -z "$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 find UTS_RELEASE definition.])
|
|
fi
|
|
|
|
AC_MSG_RESULT([$kernsrcver])
|
|
|
|
LINUX=${kernelsrc}
|
|
LINUX_OBJ=${kernelbuild}
|
|
LINUX_VERSION=${kernsrcver}
|
|
|
|
AC_SUBST(LINUX)
|
|
AC_SUBST(LINUX_OBJ)
|
|
AC_SUBST(LINUX_VERSION)
|
|
|
|
ZFS_AC_MODULE_SYMVERS
|
|
])
|
|
|
|
dnl #
|
|
dnl # Detect name used for the additional SPL Module.symvers file. If one
|
|
dnl # does not exist this is likely because the SPL has been configured
|
|
dnl # but not built. To allow recursive builds a good guess is made as to
|
|
dnl # what this file will be named based on what it is named in the kernel
|
|
dnl # build products. This file will first be used at link time so if
|
|
dnl # the guess is wrong the build will fail then. This unfortunately
|
|
dnl # means the ZFS package does not contain a reliable mechanism to
|
|
dnl # detect symbols exported by the SPL at configure time.
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
|
|
AC_MSG_CHECKING([spl file name for module symbols])
|
|
if test -r $SPL_OBJ/Module.symvers; then
|
|
SPL_SYMBOLS=Module.symvers
|
|
elif test -r $SPL_OBJ/Modules.symvers; then
|
|
SPL_SYMBOLS=Modules.symvers
|
|
elif test -r $SPL_OBJ/module/Module.symvers; then
|
|
SPL_SYMBOLS=Module.symvers
|
|
elif test -r $SPL_OBJ/module/Modules.symvers; then
|
|
SPL_SYMBOLS=Modules.symvers
|
|
else
|
|
SPL_SYMBOLS=$LINUX_SYMBOLS
|
|
fi
|
|
|
|
AC_MSG_RESULT([$SPL_SYMBOLS])
|
|
AC_SUBST(SPL_SYMBOLS)
|
|
])
|
|
|
|
dnl #
|
|
dnl # Detect the SPL module to be built against
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_SPL], [
|
|
AC_ARG_WITH([spl],
|
|
AS_HELP_STRING([--with-spl=PATH],
|
|
[Path to spl source]),
|
|
[splsrc="$withval"])
|
|
|
|
AC_ARG_WITH([spl-obj],
|
|
AS_HELP_STRING([--with-spl-obj=PATH],
|
|
[Path to spl build objects]),
|
|
[splbuild="$withval"])
|
|
|
|
|
|
AC_MSG_CHECKING([spl source directory])
|
|
if test -z "$splsrc"; then
|
|
sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
|
|
2>/dev/null | tail -1`
|
|
|
|
if test -z "$sourcelink" || test ! -e $sourcelink; then
|
|
sourcelink=../spl
|
|
fi
|
|
|
|
if test -e $sourcelink; then
|
|
splsrc=`readlink -f ${sourcelink}`
|
|
else
|
|
AC_MSG_RESULT([Not found])
|
|
AC_MSG_ERROR([
|
|
*** Please make sure the spl devel package for your distribution
|
|
*** is installed then try again. If that fails you can specify the
|
|
*** location of the spl source with the '--with-spl=PATH' option.])
|
|
fi
|
|
else
|
|
if test "$splsrc" = "NONE"; then
|
|
splbuild=NONE
|
|
splsrcver=NONE
|
|
fi
|
|
fi
|
|
|
|
AC_MSG_RESULT([$splsrc])
|
|
AC_MSG_CHECKING([spl build directory])
|
|
if test -z "$splbuild"; then
|
|
splbuild=${splsrc}
|
|
fi
|
|
AC_MSG_RESULT([$splbuild])
|
|
|
|
AC_MSG_CHECKING([spl source version])
|
|
if test -r $splbuild/spl_config.h &&
|
|
fgrep -q SPL_META_VERSION $splbuild/spl_config.h; then
|
|
|
|
splsrcver=`(echo "#include <spl_config.h>";
|
|
echo "splsrcver=SPL_META_VERSION") |
|
|
cpp -I $splbuild |
|
|
grep "^splsrcver=" | cut -d \" -f 2`
|
|
fi
|
|
|
|
if test -z "$splsrcver"; then
|
|
AC_MSG_RESULT([Not found])
|
|
AC_MSG_ERROR([
|
|
*** Cannot determine the version of the spl source.
|
|
*** Please prepare the spl source before running this script])
|
|
fi
|
|
|
|
AC_MSG_RESULT([$splsrcver])
|
|
|
|
SPL=${splsrc}
|
|
SPL_OBJ=${splbuild}
|
|
SPL_VERSION=${splsrcver}
|
|
|
|
AC_SUBST(SPL)
|
|
AC_SUBST(SPL_OBJ)
|
|
AC_SUBST(SPL_VERSION)
|
|
|
|
ZFS_AC_SPL_MODULE_SYMVERS
|
|
])
|
|
|
|
dnl #
|
|
dnl # There are certain kernel build options which when enabled are
|
|
dnl # completely incompatible with non GPL kernel modules. It is best
|
|
dnl # to detect these at configure time and fail with a clear error
|
|
dnl # rather than build everything and fail during linking.
|
|
dnl #
|
|
dnl # CONFIG_DEBUG_LOCK_ALLOC - Maps mutex_lock() to mutex_lock_nested()
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
|
|
|
|
if test "$ZFS_META_LICENSE" = CDDL; then
|
|
ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC],
|
|
AC_MSG_ERROR([
|
|
*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is
|
|
*** incompatible with the CDDL license. You must rebuild
|
|
*** your kernel without this option.]), [])
|
|
fi
|
|
|
|
if test "$ZFS_META_LICENSE" = GPL; then
|
|
AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
|
|
[Define to 1 if licensed under the GPL])
|
|
fi
|
|
])
|
|
|
|
dnl #
|
|
dnl # ZFS_LINUX_CONFTEST
|
|
dnl #
|
|
AC_DEFUN([ZFS_LINUX_CONFTEST], [
|
|
cat confdefs.h - <<_ACEOF >conftest.c
|
|
$1
|
|
_ACEOF
|
|
])
|
|
|
|
dnl #
|
|
dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
|
|
dnl #
|
|
m4_define([ZFS_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 # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
|
|
dnl #
|
|
AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
|
|
m4_ifvaln([$1], [ZFS_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 #
|
|
dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
|
|
dnl #
|
|
AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
|
|
[ZFS_LINUX_COMPILE_IFELSE(
|
|
[AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
|
|
[modules],
|
|
[test -s build/conftest.o],
|
|
[$3], [$4])
|
|
])
|
|
|
|
dnl #
|
|
dnl # ZFS_LINUX_CONFIG
|
|
dnl #
|
|
AC_DEFUN([ZFS_LINUX_CONFIG],
|
|
[AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
|
|
ZFS_LINUX_TRY_COMPILE([
|
|
#ifndef AUTOCONF_INCLUDED
|
|
#include <linux/config.h>
|
|
#endif
|
|
],[
|
|
#ifndef CONFIG_$1
|
|
#error CONFIG_$1 not #defined
|
|
#endif
|
|
],[
|
|
AC_MSG_RESULT([yes])
|
|
$2
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
$3
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # ZFS_CHECK_SYMBOL_EXPORT
|
|
dnl # check symbol exported or not
|
|
dnl #
|
|
AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT],
|
|
[AC_MSG_CHECKING([whether symbol $1 is exported])
|
|
grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
|
|
$LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
|
|
rc=$?
|
|
if test $rc -ne 0; then
|
|
export=0
|
|
for file in $2; do
|
|
grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
|
|
rc=$?
|
|
if test $rc -eq 0; then
|
|
export=1
|
|
break;
|
|
fi
|
|
done
|
|
if test $export -eq 0; then
|
|
AC_MSG_RESULT([no])
|
|
$4
|
|
else
|
|
AC_MSG_RESULT([yes])
|
|
$3
|
|
fi
|
|
else
|
|
AC_MSG_RESULT([yes])
|
|
$3
|
|
fi
|
|
])
|