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https://git.proxmox.com/git/mirror_zfs.git
synced 2025-07-23 08:07:41 +03:00
c30df9c863
1) Ensure mutex_init() never fails in the case of ENOMEM by retrying forever. I don't think I've ever seen this happen but it was clear after code inspection that if it did we would immediately crash. 2) Enable full debugging in check.sh for sanity tests. Might as well get as much debug as we can in the case of a failure. 3) Reworked list of kmem caches tracked by SPL in to a hash with the key based on the address of the kmem_cache_t. This should speed up the constructor/destructor/shrinker lookup needed now for newer kernel which removed the destructor support. 4) Updated kmem_cache_create to handle the case where CONFIG_SLUB is defined. The slub would occasionally merge slab caches which resulted in non-unique keys for our hash lookup in 3). To fix this we detect if the slub is enabled and then set the needed flag to prevent this merging from ever occuring. 5) New kernels removed the proc_dir_entry pointer from items registered by sysctl. This means we can no long be sneaky and manually insert things in to the sysctl tree simply by walking the proc tree. So I'm forced to create a seperate tree for all the things I can't easily support via sysctl interface. I don't like it but it will do for now. git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@124 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
553 lines
14 KiB
Plaintext
553 lines
14 KiB
Plaintext
AC_DEFUN([SPL_AC_KERNEL], [
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ver=`uname -r`
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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="$withval"; kernelbuild="$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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kernelbuild=
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sourcelink=/lib/modules/${ver}/source
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buildlink=/lib/modules/${ver}/build
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if test -e $sourcelink; then
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kernelsrc=`(cd $sourcelink; /bin/pwd)`
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fi
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if test -e $buildlink; then
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kernelbuild=`(cd $buildlink; /bin/pwd)`
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fi
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if test -z "$kernelsrc"; then
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kernelsrc=$kernelbuild
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fi
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if test -z "$kernelsrc" -o -z "$kernelbuild"; then
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AC_MSG_RESULT([Not found])
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AC_MSG_ERROR([
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*** Please specify the location of the kernel source
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*** with the '--with-kernel=PATH' option])
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fi
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fi
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AC_MSG_RESULT([$kernelsrc])
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AC_MSG_CHECKING([kernel build directory])
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AC_MSG_RESULT([$kernelbuild])
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AC_MSG_CHECKING([kernel source version])
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if test -r $kernelbuild/include/linux/version.h &&
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fgrep -q UTS_RELEASE $kernelbuild/include/linux/version.h; then
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kernsrcver=`(echo "#include <linux/version.h>";
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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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elif test -r $kernelbuild/include/linux/utsrelease.h &&
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fgrep -q UTS_RELEASE $kernelbuild/include/linux/utsrelease.h; then
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kernsrcver=`(echo "#include <linux/utsrelease.h>";
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echo "kernsrcver=UTS_RELEASE") |
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cpp -I $kernelbuild/include |
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grep "^kernsrcver=" | cut -d \" -f 2`
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fi
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if test -z "$kernsrcver"; then
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AC_MSG_RESULT([Not found])
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AC_MSG_ERROR([
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*** Cannot determine the version of the linux kernel source.
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*** Please prepare the kernel before running this script])
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fi
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AC_MSG_RESULT([$kernsrcver])
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kmoduledir=${INSTALL_MOD_PATH}/lib/modules/$kernsrcver
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LINUX=${kernelsrc}
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LINUX_OBJ=${kernelbuild}
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AC_SUBST(LINUX)
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AC_SUBST(LINUX_OBJ)
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AC_SUBST(kmoduledir)
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])
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AC_DEFUN([SPL_AC_DEBUG], [
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AC_MSG_CHECKING([whether debugging is enabled])
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AC_ARG_ENABLE( [debug],
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AS_HELP_STRING([--enable-debug],
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[Enable generic debug support (default off)]),
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[ case "$enableval" in
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yes) spl_ac_debug=yes ;;
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no) spl_ac_debug=no ;;
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*) AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$enableval" for --enable-debug]) ;;
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esac ]
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)
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if test "$spl_ac_debug" = yes; then
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG"
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else
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
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AC_DEFINE([NDEBUG], [1],
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[Define to 1 to disable debug tracing])
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fi
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AC_MSG_RESULT([${spl_ac_debug=no}])
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])
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AC_DEFUN([SPL_AC_DEBUG_KMEM], [
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AC_MSG_CHECKING([whether kmem debugging is enabled])
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AC_ARG_ENABLE( [debug-kmem],
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AS_HELP_STRING([--enable-debug-kmem],
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[Enable kmem debug support (default off)]),
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[ case "$enableval" in
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yes) spl_ac_debug=yes ;;
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no) spl_ac_debug=no ;;
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*) AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kmem]) ;;
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esac ]
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)
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if test "$spl_ac_debug" = yes; then
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
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AC_DEFINE([DEBUG_KMEM], [1],
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[Define to 1 to enable kmem debugging])
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fi
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AC_MSG_RESULT([${spl_ac_debug=no}])
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])
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AC_DEFUN([SPL_AC_DEBUG_MUTEX], [
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AC_MSG_CHECKING([whether mutex debugging is enabled])
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AC_ARG_ENABLE( [debug-mutex],
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AS_HELP_STRING([--enable-debug-mutex],
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[Enable mutex debug support (default off)]),
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[ case "$enableval" in
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yes) spl_ac_debug=yes ;;
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no) spl_ac_debug=no ;;
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*) AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-mutex]) ;;
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esac ]
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)
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if test "$spl_ac_debug" = yes; then
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_MUTEX"
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AC_DEFINE([DEBUG_MUTEX], [1],
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[Define to 1 to enable mutex debugging])
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fi
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AC_MSG_RESULT([${spl_ac_debug=no}])
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])
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AC_DEFUN([SPL_AC_DEBUG_KSTAT], [
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AC_MSG_CHECKING([whether kstat debugging is enabled])
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AC_ARG_ENABLE( [debug-kstat],
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AS_HELP_STRING([--enable-debug-kstat],
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[Enable kstat debug support (default off)]),
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[ case "$enableval" in
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yes) spl_ac_debug=yes ;;
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no) spl_ac_debug=no ;;
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*) AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kstat]) ;;
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esac ]
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)
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if test "$spl_ac_debug" = yes; then
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KSTAT"
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AC_DEFINE([DEBUG_KSTAT], [1],
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[Define to 1 to enable kstat debugging])
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fi
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AC_MSG_RESULT([${spl_ac_debug=no}])
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])
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AC_DEFUN([SPL_AC_DEBUG_CALLB], [
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AC_MSG_CHECKING([whether callb debugging is enabled])
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AC_ARG_ENABLE( [debug-callb],
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AS_HELP_STRING([--enable-debug-callb],
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[Enable callb debug support (default off)]),
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[ case "$enableval" in
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yes) spl_ac_debug=yes ;;
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no) spl_ac_debug=no ;;
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*) AC_MSG_RESULT([Error!])
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AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-callb]) ;;
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esac ]
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)
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if test "$spl_ac_debug" = yes; then
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KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_CALLB"
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AC_DEFINE([DEBUG_CALLB], [1],
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[Define to 1 to enable callb debugging])
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fi
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AC_MSG_RESULT([${spl_ac_debug=no}])
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])
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dnl #
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dnl # SPL_LINUX_CONFTEST
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dnl #
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AC_DEFUN([SPL_LINUX_CONFTEST], [
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cat >conftest.c <<_ACEOF
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$1
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_ACEOF
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])
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dnl #
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dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
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dnl #
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m4_define([SPL_LANG_PROGRAM], [
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$1
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int
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main (void)
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{
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dnl Do *not* indent the following line: there may be CPP directives.
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dnl Don't move the `;' right after for the same reason.
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$2
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;
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return 0;
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}
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])
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dnl #
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dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
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dnl #
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AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
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m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])dnl
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rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
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echo "obj-m := conftest.o" >build/Makefile
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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])],
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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])],
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[$4],
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[_AC_MSG_LOG_CONFTEST
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m4_ifvaln([$5],[$5])dnl])dnl
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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
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])
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dnl #
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dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
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dnl #
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AC_DEFUN([SPL_LINUX_TRY_COMPILE],
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[SPL_LINUX_COMPILE_IFELSE(
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[AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
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[modules],
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[test -s build/conftest.o],
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[$3], [$4])
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])
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dnl #
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dnl # SPL_LINUX_CONFIG
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dnl #
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AC_DEFUN([SPL_LINUX_CONFIG],
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[AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
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SPL_LINUX_TRY_COMPILE([
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#ifndef AUTOCONF_INCLUDED
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#include <linux/config.h>
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#endif
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],[
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#ifndef CONFIG_$1
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#error CONFIG_$1 not #defined
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#endif
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],[
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AC_MSG_RESULT([yes])
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$2
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],[
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AC_MSG_RESULT([no])
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$3
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])
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])
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dnl #
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dnl # SPL_CHECK_SYMBOL_EXPORT
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dnl # check symbol exported or not
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dnl #
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AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT],
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[AC_MSG_CHECKING([whether symbol $1 is exported])
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grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/Module.symvers 2>/dev/null
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rc=$?
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if test $rc -ne 0; then
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export=0
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for file in $2; do
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grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
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rc=$?
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if test $rc -eq 0; then
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export=1
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break;
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fi
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done
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if test $export -eq 0; then
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AC_MSG_RESULT([no])
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$4
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else
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AC_MSG_RESULT([yes])
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$3
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fi
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else
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AC_MSG_RESULT([yes])
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$3
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fi
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])
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dnl #
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dnl # 2.6.x API change
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dnl # Slab can now be implemented in terms of the Slub which provides
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dnl # slightly different semantics in terms of merged caches.
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dnl #
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AC_DEFUN([SPL_AC_SLUB], [
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SPL_LINUX_CONFIG([SLUB],
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[AC_DEFINE(HAVE_SLUB, 1, [slub support configured])],
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[])
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])
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dnl #
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dnl # 2.6.x API change
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dnl # check if uintptr_t typedef is defined
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dnl #
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AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
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[AC_MSG_CHECKING([whether kernel defines uintptr_t])
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SPL_LINUX_TRY_COMPILE([
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#include <linux/types.h>
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],[
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uintptr_t *ptr;
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],[
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AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_UINTPTR_T, 1,
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[kernel defines uintptr_t])
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],[
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AC_MSG_RESULT([no])
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])
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])
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dnl #
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dnl # 2.6.x API change
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dnl # check if kmem_cache_t typedef is defined
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dnl #
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AC_DEFUN([SPL_AC_TYPE_KMEM_CACHE_T],
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[AC_MSG_CHECKING([whether kernel defines kmem_cache_t])
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SPL_LINUX_TRY_COMPILE([
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#include <linux/slab.h>
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],[
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kmem_cache_t *cache;
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],[
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AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_KMEM_CACHE_T, 1,
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[kernel defines kmem_cache_t])
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],[
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AC_MSG_RESULT([no])
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])
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])
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dnl #
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dnl # 2.6.19 API change
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dnl # kmem_cache_destroy() return void instead of int
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dnl #
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AC_DEFUN([SPL_AC_KMEM_CACHE_DESTROY_INT],
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[AC_MSG_CHECKING([whether kmem_cache_destroy() returns int])
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SPL_LINUX_TRY_COMPILE([
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#include <linux/slab.h>
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],[
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int i = kmem_cache_destroy(NULL);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KMEM_CACHE_DESTROY_INT, 1,
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[kmem_cache_destroy() returns int])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # 2.6.19 API change
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dnl # panic_notifier_list use atomic_notifier operations
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dnl #
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AC_DEFUN([SPL_AC_ATOMIC_PANIC_NOTIFIER],
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[AC_MSG_CHECKING([whether panic_notifier_list is atomic])
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SPL_LINUX_TRY_COMPILE([
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#include <linux/notifier.h>
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#include <linux/kernel.h>
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],[
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struct atomic_notifier_head panic_notifier_list;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_ATOMIC_PANIC_NOTIFIER, 1,
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[panic_notifier_list is atomic])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # 2.6.20 API change
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dnl # INIT_WORK use 2 args and not store data inside
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dnl #
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AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
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[AC_MSG_CHECKING([whether INIT_WORK wants 3 args])
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SPL_LINUX_TRY_COMPILE([
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#include <linux/workqueue.h>
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],[
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struct work_struct work;
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INIT_WORK(&work, NULL, NULL);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1,
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[INIT_WORK wants 3 args])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # 2.6.21 api change.
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dnl # 'register_sysctl_table' use only one argument instead of two
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dnl #
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AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
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[AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
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SPL_LINUX_TRY_COMPILE([
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#include <linux/sysctl.h>
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],[
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return register_sysctl_table(NULL,0);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
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[register_sysctl_table() wants 2 args])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # 2.6.21 API change
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dnl # Use struct kmem_cache for missing kmem_cache_t
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dnl #
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AC_DEFUN([SPL_AC_KMEM_CACHE_T], [
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AC_MSG_CHECKING([whether kernel has kmem_cache_t])
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Werror"
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SPL_LINUX_TRY_COMPILE([
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#include <linux/slab.h>
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],[
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kmem_cache_t *cachep = NULL;
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kmem_cache_free(cachep, NULL);
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],[
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AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_KMEM_CACHE_T, 1,
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[kernel has struct kmem_cache_t])
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],[
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AC_MSG_RESULT([no])
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])
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EXTRA_KCFLAGS="$tmp_flags"
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])
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dnl #
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dnl # 2.6.23 API change
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dnl # Slab no longer accepts a dtor argument
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dnl #
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AC_DEFUN([SPL_AC_KMEM_CACHE_CREATE_DTOR],
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[AC_MSG_CHECKING([whether kmem_cache_create() has dtor arg])
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SPL_LINUX_TRY_COMPILE([
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#include <linux/slab.h>
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],[
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kmem_cache_create(NULL, 0, 0, 0, NULL, NULL);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KMEM_CACHE_CREATE_DTOR, 1,
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[kmem_cache_create() has dtor arg])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # 2.6.x API change
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dnl # Slab ctor no longer takes 3 args
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dnl #
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AC_DEFUN([SPL_AC_3ARG_KMEM_CACHE_CREATE_CTOR],
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[AC_MSG_CHECKING([whether slab ctor wants 3 args])
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Werror"
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SPL_LINUX_TRY_COMPILE([
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#include <linux/slab.h>
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],[
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void (*ctor)(void *,struct kmem_cache *,unsigned long) = NULL;
|
|
|
|
#ifdef HAVE_KMEM_CACHE_CREATE_DTOR
|
|
kmem_cache_create(NULL, 0, 0, 0, ctor, NULL);
|
|
#else
|
|
kmem_cache_create(NULL, 0, 0, 0, ctor);
|
|
#endif
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_3ARG_KMEM_CACHE_CREATE_CTOR, 1,
|
|
[slab ctor wants 3 args])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.x API change
|
|
dnl # Old set_shrinker API replaced with register_shrinker
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_SET_SHRINKER], [
|
|
AC_MSG_CHECKING([whether set_shrinker() available])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/mm.h>
|
|
],[
|
|
return set_shrinker(DEFAULT_SEEKS, NULL);
|
|
],[
|
|
AC_MSG_RESULT([yes])
|
|
AC_DEFINE(HAVE_SET_SHRINKER, 1,
|
|
[set_shrinker() available])
|
|
],[
|
|
AC_MSG_RESULT([no])
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.x API change
|
|
dnl # struct path entry added to struct nameidata
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
|
|
[AC_MSG_CHECKING([whether struct path used in struct nameidata])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/namei.h>
|
|
],[
|
|
struct nameidata nd;
|
|
|
|
nd.path.mnt = NULL;
|
|
nd.path.dentry = NULL;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
|
|
[struct path used in struct nameidata])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|
|
|
|
dnl #
|
|
dnl # Custom SPL patch may export this system it is not required
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_TASK_CURR], [
|
|
SPL_CHECK_SYMBOL_EXPORT([task_curr], [kernel/sched.c],
|
|
[AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() exported])],
|
|
[])
|
|
])
|
|
|
|
dnl #
|
|
dnl # 2.6.x API change
|
|
dnl # Use CTL_UNNUMBERED when binary sysctl is not required
|
|
dnl #
|
|
AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
|
|
[AC_MSG_CHECKING([whether unnumbered sysctl support exists])
|
|
SPL_LINUX_TRY_COMPILE([
|
|
#include <linux/sysctl.h>
|
|
],[
|
|
#ifndef CTL_UNNUMBERED
|
|
#error CTL_UNNUMBERED undefined
|
|
#endif
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
|
|
[unnumbered sysctl support exists])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|