diff options
| -rw-r--r-- | config/kernel.m4 | 78 | ||||
| -rwxr-xr-x | configure | 218 |
2 files changed, 237 insertions, 59 deletions
diff --git a/config/kernel.m4 b/config/kernel.m4 index 48e92ced4..0f6100071 100644 --- a/config/kernel.m4 +++ b/config/kernel.m4 @@ -311,34 +311,74 @@ 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 <linux/module.h> + #include <linux/mutex.h> + + MODULE_LICENSE("$ZFS_META_LICENSE"); + ],[ + struct mutex lock; + + mutex_init(&lock); + mutex_lock(&lock); + mutex_unlock(&lock); + ],[ + AC_MSG_RESULT(no) + ],[ + AC_MSG_RESULT(yes) + AC_MSG_ERROR([ + *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible + *** with the CDDL license. You must rebuild your kernel without + *** this option enabled.]) + ]) + EXTRA_KCFLAGS="$tmp_flags" + ], []) ]) dnl # @@ -12396,6 +12396,19 @@ $as_echo "$SPL_SYMBOLS" >&6; } + if test "$ZFS_META_LICENSE" = GPL; then + + +cat >>confdefs.h <<\_ACEOF +#define HAVE_GPL_ONLY_SYMBOLS 1 +_ACEOF + + +fi + + + + { $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_PREEMPT" >&5 $as_echo_n "checking whether Linux was built with CONFIG_PREEMPT... " >&6; } @@ -12466,9 +12479,9 @@ fi - if test "$ZFS_META_LICENSE" = CDDL; then - { $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC" >&5 + + { $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC" >&5 $as_echo_n "checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC... " >&6; } @@ -12513,23 +12526,74 @@ _ACEOF { $as_echo "$as_me:$LINENO: result: yes" >&5 $as_echo "yes" >&6; } - { { $as_echo "$as_me:$LINENO: error: - *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is - *** incompatible with the CDDL license. You must rebuild - *** your kernel without this option." >&5 -$as_echo "$as_me: error: - *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is - *** incompatible with the CDDL license. You must rebuild - *** your kernel without this option." >&2;} - { (exit 1); exit 1; }; } + + { $as_echo "$as_me:$LINENO: checking whether mutex_lock() is GPL-only" >&5 +$as_echo_n "checking whether mutex_lock() is GPL-only... " >&6; } + tmp_flags="$EXTRA_KCFLAGS" + + +cat confdefs.h - <<_ACEOF >conftest.c +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ + + + #include <linux/module.h> + #include <linux/mutex.h> + + MODULE_LICENSE("$ZFS_META_LICENSE"); + +int +main (void) +{ + + struct mutex lock; + + mutex_init(&lock); + mutex_lock(&lock); + mutex_unlock(&lock); + + ; + return 0; +} + +_ACEOF + + + rm -Rf build && mkdir -p build + echo "obj-m := conftest.o" >build/Makefile + if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + + { $as_echo "$as_me:$LINENO: result: no" >&5 +$as_echo "no" >&6; } else $as_echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 - { $as_echo "$as_me:$LINENO: result: no" >&5 -$as_echo "no" >&6; } - + { $as_echo "$as_me:$LINENO: result: yes" >&5 +$as_echo "yes" >&6; } + { { $as_echo "$as_me:$LINENO: error: + *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible + *** with the CDDL license. You must rebuild your kernel without + *** this option enabled." >&5 +$as_echo "$as_me: error: + *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible + *** with the CDDL license. You must rebuild your kernel without + *** this option enabled." >&2;} + { (exit 1); exit 1; }; } @@ -12538,21 +12602,26 @@ fi rm -Rf build + EXTRA_KCFLAGS="$tmp_flags" -fi - +else + $as_echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 - if test "$ZFS_META_LICENSE" = GPL; then + { $as_echo "$as_me:$LINENO: result: no" >&5 +$as_echo "no" >&6; } -cat >>confdefs.h <<\_ACEOF -#define HAVE_GPL_ONLY_SYMBOLS 1 -_ACEOF fi + rm -Rf build + + + + { $as_echo "$as_me:$LINENO: checking block device operation prototypes" >&5 @@ -18420,6 +18489,19 @@ $as_echo "$SPL_SYMBOLS" >&6; } + if test "$ZFS_META_LICENSE" = GPL; then + + +cat >>confdefs.h <<\_ACEOF +#define HAVE_GPL_ONLY_SYMBOLS 1 +_ACEOF + + +fi + + + + { $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_PREEMPT" >&5 $as_echo_n "checking whether Linux was built with CONFIG_PREEMPT... " >&6; } @@ -18490,9 +18572,9 @@ fi - if test "$ZFS_META_LICENSE" = CDDL; then - { $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC" >&5 + + { $as_echo "$as_me:$LINENO: checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC" >&5 $as_echo_n "checking whether Linux was built with CONFIG_DEBUG_LOCK_ALLOC... " >&6; } @@ -18537,23 +18619,74 @@ _ACEOF { $as_echo "$as_me:$LINENO: result: yes" >&5 $as_echo "yes" >&6; } - { { $as_echo "$as_me:$LINENO: error: - *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is - *** incompatible with the CDDL license. You must rebuild - *** your kernel without this option." >&5 -$as_echo "$as_me: error: - *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is - *** incompatible with the CDDL license. You must rebuild - *** your kernel without this option." >&2;} - { (exit 1); exit 1; }; } + + { $as_echo "$as_me:$LINENO: checking whether mutex_lock() is GPL-only" >&5 +$as_echo_n "checking whether mutex_lock() is GPL-only... " >&6; } + tmp_flags="$EXTRA_KCFLAGS" + + +cat confdefs.h - <<_ACEOF >conftest.c +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ + + + #include <linux/module.h> + #include <linux/mutex.h> + + MODULE_LICENSE("$ZFS_META_LICENSE"); + +int +main (void) +{ + + struct mutex lock; + + mutex_init(&lock); + mutex_lock(&lock); + mutex_unlock(&lock); + + ; + return 0; +} + +_ACEOF + + + rm -Rf build && mkdir -p build + echo "obj-m := conftest.o" >build/Makefile + if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + + { $as_echo "$as_me:$LINENO: result: no" >&5 +$as_echo "no" >&6; } else $as_echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 - { $as_echo "$as_me:$LINENO: result: no" >&5 -$as_echo "no" >&6; } - + { $as_echo "$as_me:$LINENO: result: yes" >&5 +$as_echo "yes" >&6; } + { { $as_echo "$as_me:$LINENO: error: + *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible + *** with the CDDL license. You must rebuild your kernel without + *** this option enabled." >&5 +$as_echo "$as_me: error: + *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible + *** with the CDDL license. You must rebuild your kernel without + *** this option enabled." >&2;} + { (exit 1); exit 1; }; } @@ -18562,21 +18695,26 @@ fi rm -Rf build + EXTRA_KCFLAGS="$tmp_flags" -fi - +else + $as_echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 - if test "$ZFS_META_LICENSE" = GPL; then + { $as_echo "$as_me:$LINENO: result: no" >&5 +$as_echo "no" >&6; } -cat >>confdefs.h <<\_ACEOF -#define HAVE_GPL_ONLY_SYMBOLS 1 -_ACEOF fi + rm -Rf build + + + + { $as_echo "$as_me:$LINENO: checking block device operation prototypes" >&5 |