X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=config%2Fkernel.m4;h=7d8a5f4d5339abc32ea3e6b360131ec87185e60f;hb=5085d55817f67e2333366e517c6cc7a6fdda50f7;hp=45e9b149aa83296485625f918a60bbcf051dcdd0;hpb=166dd49de0272e6f179e5fd6a41eebb4880a1154;p=zfs.git diff --git a/config/kernel.m4 b/config/kernel.m4 index 45e9b14..7d8a5f4 100644 --- a/config/kernel.m4 +++ b/config/kernel.m4 @@ -4,10 +4,12 @@ dnl # AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [ ZFS_AC_KERNEL ZFS_AC_SPL + ZFS_AC_TEST_MODULE 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_3ARG_BLKDEV_GET ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS @@ -21,22 +23,39 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [ ZFS_AC_KERNEL_BIO_RW_SYNCIO ZFS_AC_KERNEL_REQ_SYNC ZFS_AC_KERNEL_BLK_END_REQUEST + ZFS_AC_KERNEL_BLK_QUEUE_FLUSH + ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS + ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS + ZFS_AC_KERNEL_BLK_QUEUE_PHYSICAL_BLOCK_SIZE + ZFS_AC_KERNEL_BLK_QUEUE_IO_OPT + ZFS_AC_KERNEL_BLK_QUEUE_NONROT + ZFS_AC_KERNEL_BLK_QUEUE_DISCARD 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_GET_GENDISK ZFS_AC_KERNEL_RQ_IS_SYNC ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT + ZFS_AC_KERNEL_DISCARD_GRANULARITY ZFS_AC_KERNEL_CONST_XATTR_HANDLER ZFS_AC_KERNEL_XATTR_HANDLER_GET ZFS_AC_KERNEL_XATTR_HANDLER_SET + ZFS_AC_KERNEL_SHOW_OPTIONS ZFS_AC_KERNEL_FSYNC ZFS_AC_KERNEL_EVICT_INODE ZFS_AC_KERNEL_NR_CACHED_OBJECTS ZFS_AC_KERNEL_FREE_CACHED_OBJECTS + ZFS_AC_KERNEL_FALLOCATE + ZFS_AC_KERNEL_TRUNCATE_RANGE + ZFS_AC_KERNEL_CREATE_UMODE_T + ZFS_AC_KERNEL_AUTOMOUNT + ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE + ZFS_AC_KERNEL_CLEAR_INODE ZFS_AC_KERNEL_INSERT_INODE_LOCKED + ZFS_AC_KERNEL_D_MAKE_ROOT ZFS_AC_KERNEL_D_OBTAIN_ALIAS ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE ZFS_AC_KERNEL_TRUNCATE_SETSIZE @@ -69,7 +88,7 @@ dnl # AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [ modpost=$LINUX/scripts/Makefile.modpost AC_MSG_CHECKING([kernel file name for module symbols]) - AS_IF([test -f "$modpost"], [ + AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [ AS_IF([grep -q Modules.symvers $modpost], [ LINUX_SYMBOLS=Modules.symvers ], [ @@ -141,7 +160,7 @@ AC_DEFUN([ZFS_AC_KERNEL], [ ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [ kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu} ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [ - kernelbuild=${kernelsrc}-obj/${target_cpu}/default + kernelbuild=${kernelsrc}-obj/${target_cpu}/default ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [ kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu} ], [ @@ -174,7 +193,13 @@ AC_DEFUN([ZFS_AC_KERNEL], [ ]) ], [ AC_MSG_RESULT([Not found]) - AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.]) + if test "x$enable_linux_builtin" != xyes; then + AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.]) + else + AC_MSG_ERROR([ + *** Cannot find UTS_RELEASE definition. + *** Please run 'make prepare' inside the kernel source tree.]) + fi ]) AC_MSG_RESULT([$kernsrcver]) @@ -193,24 +218,45 @@ AC_DEFUN([ZFS_AC_KERNEL], [ 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 # but not built. The '--with-spl-timeout' option can be passed +dnl # to pause here, waiting for the file to appear from a concurrently +dnl # building SPL package. If the file does not appear in time, a good +dnl # guess is made as to what this file will be named based on what it +dnl # is named in the kernel build products. This file will first be +dnl # used at link time so if the guess is wrong the build will fail +dnl # then. This unfortunately means the ZFS package does not contain a +dnl # reliable mechanism to detect symbols exported by the SPL at +dnl # configure time. dnl # AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [ + AC_ARG_WITH([spl-timeout], + AS_HELP_STRING([--with-spl-timeout=SECS], + [Wait SECS for symvers file to appear @<:@default=0@:>@]), + [timeout="$withval"], [timeout=0]) + AC_MSG_CHECKING([spl file name for module symbols]) - AS_IF([test -r $SPL_OBJ/Module.symvers], [ - SPL_SYMBOLS=Module.symvers - ], [test -r $SPL_OBJ/Modules.symvers], [ - SPL_SYMBOLS=Modules.symvers - ], [test -r $SPL_OBJ/module/Module.symvers], [ - SPL_SYMBOLS=Module.symvers - ], [test -r $SPL_OBJ/module/Modules.symvers], [ - SPL_SYMBOLS=Modules.symvers - ], [ + SPL_SYMBOLS=NONE + + while true; do + AS_IF([test -r $SPL_OBJ/Module.symvers], [ + SPL_SYMBOLS=Module.symvers + ], [test -r $SPL_OBJ/Modules.symvers], [ + SPL_SYMBOLS=Modules.symvers + ], [test -r $SPL_OBJ/module/Module.symvers], [ + SPL_SYMBOLS=Module.symvers + ], [test -r $SPL_OBJ/module/Modules.symvers], [ + SPL_SYMBOLS=Modules.symvers + ]) + + AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [ + break; + ], [ + sleep 1 + timeout=$((timeout-1)) + ]) + done + + AS_IF([test "$SPL_SYMBOLS" = NONE], [ SPL_SYMBOLS=$LINUX_SYMBOLS ]) @@ -270,9 +316,9 @@ AC_DEFUN([ZFS_AC_SPL], [ fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [ splsrcver=`(echo "#include "; - echo "splsrcver=SPL_META_VERSION") | + echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") | cpp -I $splbuild | - grep "^splsrcver=" | cut -d \" -f 2` + grep "^splsrcver=" | tr -d \" | cut -d= -f2` ]) AS_IF([test -z "$splsrcver"], [ @@ -296,38 +342,98 @@ AC_DEFUN([ZFS_AC_SPL], [ ]) dnl # +dnl # Basic toolchain sanity check. +dnl # +AC_DEFUN([ZFS_AC_TEST_MODULE], + [AC_MSG_CHECKING([whether modules can be built]) + ZFS_LINUX_TRY_COMPILE([],[],[ + AC_MSG_RESULT([yes]) + ],[ + AC_MSG_RESULT([no]) + if test "x$enable_linux_builtin" != xyes; then + AC_MSG_ERROR([*** Unable to build an empty module.]) + else + AC_MSG_ERROR([ + *** Unable to build an empty module. + *** Please run 'make scripts' inside the kernel source tree.]) + fi + ]) +]) + +dnl # dnl # Certain kernel build options are not supported. These must be dnl # detected at configure time and cause a build failure. Otherwise dnl # modules may be successfully built that behave incorrectly. dnl # -dnl # CONFIG_PREEMPT - Preempt kernels require special handling. +AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [ + + AS_IF([test "$ZFS_META_LICENSE" = GPL], [ + AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1], + [Define to 1 if licensed under the GPL]) + ]) + + ZFS_AC_KERNEL_CONFIG_PREEMPT + ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC +]) + 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 # Check CONFIG_PREEMPT dnl # -dnl # CONFIG_DEBUG_LOCK_ALLOC - Maps mutex_lock() to mutex_lock_nested() +dnl # Premptible kernels will be supported in the future. But at the +dnl # moment there are a few places in the code which need to be updated +dnl # to accomidate them. Until that work occurs we should detect this +dnl # at configure time and fail with a sensible message. Otherwise, +dnl # people will be able to build successfully, however they will have +dnl # stability problems. See https://github.com/zfsonlinux/zfs/issues/83 dnl # -AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [ +AC_DEFUN([ZFS_AC_KERNEL_CONFIG_PREEMPT], [ ZFS_LINUX_CONFIG([PREEMPT], AC_MSG_ERROR([ *** Kernel built with CONFIG_PREEMPT which is not supported. *** You must rebuild your kernel without this option.]), []) +]) - AS_IF([test "$ZFS_META_LICENSE" = CDDL], [ - ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], - AC_MSG_ERROR([ - *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is - *** incompatible with the CDDL license. You must rebuild - *** your kernel without this option.]), []) - ]) - - AS_IF([test "$ZFS_META_LICENSE" = GPL], [ - AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1], - [Define to 1 if licensed under the GPL]) - ]) +dnl # +dnl # Check CONFIG_DEBUG_LOCK_ALLOC +dnl # +dnl # This is typically only set for debug kernels because it comes with +dnl # a performance penalty. However, when it is set it maps the non-GPL +dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol. +dnl # This will cause a failure at link time which we'd rather know about +dnl # at compile time. +dnl # +dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol +dnl # with the upstream community we add a check to detect this case. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [ + + ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [ + AC_MSG_CHECKING([whether mutex_lock() is GPL-only]) + tmp_flags="$EXTRA_KCFLAGS" + ZFS_LINUX_TRY_COMPILE([ + #include + #include + + MODULE_LICENSE("$ZFS_META_LICENSE"); + ],[ + struct mutex lock; + + mutex_init(&lock); + mutex_lock(&lock); + mutex_unlock(&lock); + ],[ + AC_MSG_RESULT(no) + ],[ + AC_MSG_RESULT(yes) + AC_MSG_ERROR([ + *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible + *** with the CDDL license and will prevent the module linking stage + *** from succeeding. You must rebuild your kernel without this + *** option enabled.]) + ]) + EXTRA_KCFLAGS="$tmp_flags" + ], []) ]) dnl # @@ -360,10 +466,12 @@ dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE dnl # AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [ m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])]) - rm -Rf build && mkdir -p build + rm -Rf build && mkdir -p build && touch build/conftest.mod.c echo "obj-m := conftest.o" >build/Makefile + modpost_flag='' + test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage AS_IF( - [AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])], + [AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])], [$4], [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])] ) @@ -405,30 +513,48 @@ 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]) +AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [ grep -q -E '[[[:space:]]]$1[[[:space:]]]' \ $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null rc=$? - AS_IF([test $rc -ne 0], [ + 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/$file" 2>/dev/null rc=$? - AS_IF([test $rc -eq 0], [ + if test $rc -eq 0; then export=1 break; - ]) + fi done - AS_IF([test $export -eq 0], [ - AC_MSG_RESULT([no]) + if test $export -eq 0; then : $4 - ], [ - AC_MSG_RESULT([yes]) + else : $3 - ]) - ], [ - AC_MSG_RESULT([yes]) + fi + else : $3 - ]) + fi +]) + +dnl # +dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL +dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT +dnl # is called if not compiling for builtin +dnl # +AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [ + ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1]) + if test $rc -ne 0; then : + $6 + else + if test "x$enable_linux_builtin" != xyes; then + ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1]) + fi + if test $rc -ne 0; then : + $6 + else : + $5 + fi + fi ])