[OE-core] [PATCH 2/2 v4] module.bbclass: Create a new depmodwrapper to assist cross-installs

[Mark Hatle]

V4 - fix the usage check
V3 - change to SSTATE_SCAN_FILES
V2 - add additional kernel-abiversion check

Sorry for so many versions.  This should be the final one.

--Mark

On 2/28/13 3:51 PM, Mark Hatle wrote:
> Previously the build path to STAGING_KERNEL_DIR was being embedded into the
> package post install scripts.  We avoid this behavior by generating a special
> depmodwrapper script.  This script contains that hard-coded path, ensuring
> that re-use of the sstate-cache (and/or packages) will always run through the
> wrapper generated by the current build with a checksum that includes
> STAGING_KERNEL_DIR.
>
> [ YOCTO #3962 ]
>
> Signed-off-by: Mark Hatle <mark.hatle at windriver.com>
> Signed-off-by: Bruce Ashfield <bruce.ashfield at windriver.com>
> ---
>   meta/classes/image.bbclass                         |    4 +-
>   meta/classes/kernel.bbclass                        |    8 ++--
>   meta/classes/module.bbclass                        |    4 +-
>   .../recipes-kernel/kmod/depmodwrapper-cross_1.0.bb |   43 ++++++++++++++++++++
>   4 files changed, 51 insertions(+), 8 deletions(-)
>   create mode 100644 meta/recipes-kernel/kmod/depmodwrapper-cross_1.0.bb
>
> diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
> index dd78acb..af17331 100644
> --- a/meta/classes/image.bbclass
> +++ b/meta/classes/image.bbclass
> @@ -10,7 +10,7 @@ inherit gzipnative
>
>   LICENSE = "MIT"
>   PACKAGES = ""
> -DEPENDS += "${MLPREFIX}qemuwrapper-cross"
> +DEPENDS += "${MLPREFIX}qemuwrapper-cross depmodwrapper-cross"
>   RDEPENDS += "${IMAGE_INSTALL} ${LINGUAS_INSTALL} ${NORMAL_FEATURE_INSTALL} ${ROOTFS_BOOTSTRAP_INSTALL}"
>   RRECOMMENDS += "${NORMAL_FEATURE_INSTALL_OPTIONAL}"
>
> @@ -283,7 +283,7 @@ fakeroot do_rootfs () {
>   		KERNEL_VERSION=`cat ${STAGING_KERNEL_DIR}/kernel-abiversion`
>
>   		mkdir -p ${IMAGE_ROOTFS}/lib/modules/$KERNEL_VERSION
> -		depmod -a -b ${IMAGE_ROOTFS} -F ${STAGING_KERNEL_DIR}/System.map-$KERNEL_VERSION $KERNEL_VERSION
> +		depmodwrapper -a -b ${IMAGE_ROOTFS} $KERNEL_VERSION
>   	fi
>
>   	${IMAGE_PREPROCESS_COMMAND}
> diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
> index e8c585b..2bdc2fc 100644
> --- a/meta/classes/kernel.bbclass
> +++ b/meta/classes/kernel.bbclass
> @@ -1,7 +1,7 @@
>   inherit linux-kernel-base module_strip
>
>   PROVIDES += "virtual/kernel"
> -DEPENDS += "virtual/${TARGET_PREFIX}gcc kmod-native"
> +DEPENDS += "virtual/${TARGET_PREFIX}gcc kmod-native depmodwrapper-cross"
>
>   # we include gcc above, we dont need virtual/libc
>   INHIBIT_DEFAULT_DEPS = "1"
> @@ -272,7 +272,7 @@ if [ ! -e "$D/lib/modules/${KERNEL_VERSION}" ]; then
>   	mkdir -p $D/lib/modules/${KERNEL_VERSION}
>   fi
>   if [ -n "$D" ]; then
> -	depmod -a -b $D -F ${STAGING_KERNEL_DIR}/System.map-${KERNEL_VERSION} ${KERNEL_VERSION}
> +	depmodwrapper -a -b $D ${KERNEL_VERSION}
>   else
>   	depmod -a ${KERNEL_VERSION}
>   fi
> @@ -282,7 +282,7 @@ pkg_postinst_modules () {
>   if [ -z "$D" ]; then
>   	depmod -a ${KERNEL_VERSION}
>   else
> -	depmod -a -b $D -F ${STAGING_KERNEL_DIR}/System.map-${KERNEL_VERSION} ${KERNEL_VERSION}
> +	depmodwrapper -a -b $D ${KERNEL_VERSION}
>   fi
>   }
>
> @@ -290,7 +290,7 @@ pkg_postrm_modules () {
>   if [ -z "$D" ]; then
>   	depmod -a ${KERNEL_VERSION}
>   else
> -	depmod -a -b $D -F ${STAGING_KERNEL_DIR}/System.map-${KERNEL_VERSION} ${KERNEL_VERSION}
> +	depmodwrapper -a -b $D ${KERNEL_VERSION}
>   fi
>   }
>
> diff --git a/meta/classes/module.bbclass b/meta/classes/module.bbclass
> index e2174a1..2c1888c 100644
> --- a/meta/classes/module.bbclass
> +++ b/meta/classes/module.bbclass
> @@ -28,7 +28,7 @@ module_pkg_postinst () {
>   if [ -z "$D" ]; then
>   	depmod -a ${KERNEL_VERSION}
>   else
> -	depmod -a -b $D -F ${STAGING_KERNEL_DIR}/System.map-${KERNEL_VERSION} ${KERNEL_VERSION}
> +	depmodwrapper -a -b $D ${KERNEL_VERSION}
>   fi
>   }
>
> @@ -36,7 +36,7 @@ module_pkg_postrm () {
>   if [ -z "$D" ]; then
>   	depmod -a ${KERNEL_VERSION}
>   else
> -	depmod -a -b $D -F ${STAGING_KERNEL_DIR}/System.map-${KERNEL_VERSION} ${KERNEL_VERSION}
> +	depmodwrapper -a -b $D ${KERNEL_VERSION}
>   fi
>   }
>
> diff --git a/meta/recipes-kernel/kmod/depmodwrapper-cross_1.0.bb b/meta/recipes-kernel/kmod/depmodwrapper-cross_1.0.bb
> new file mode 100644
> index 0000000..efb1cac
> --- /dev/null
> +++ b/meta/recipes-kernel/kmod/depmodwrapper-cross_1.0.bb
> @@ -0,0 +1,43 @@
> +DESCRIPTION = "Depmod wrapper script"
> +LICENSE = "MIT"
> +PR = "r0"
> +LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
> +
> +# We need the following for the sstate code to process the wrapper
> +SSTATE_SCAN_FILES += "depmodwrapper"
> +
> +do_install() {
> +	install -d ${D}${bindir_crossscripts}/
> +
> +	cat > ${D}${bindir_crossscripts}/depmodwrapper << EOF
> +#!/bin/sh
> +# Expected to be called as: depmodwrapper -a KERNEL_VERSION
> +if [ "\$1" != "-a" -o "\$2" != "-b" ]; then
> +    echo "Usage: depmodwrapper -a -b rootfs KERNEL_VERSION" >&2
> +    exit 1
> +fi
> +if [ ! -r ${STAGING_KERNEL_DIR}/kernel-abiversion ]; then
> +    echo "Unable to read: ${STAGING_KERNEL_DIR}/kernel-abiversion" >&2
> +else
> +    kernelabi=\$(cat ${STAGING_KERNEL_DIR}/kernel-abiversion)
> +    if [ "\$kernelabi" != "\$4" ]; then
> +        echo "Error: Kernel version \$4 does not match kernel-abiversion (\$kernelabi)" >&2
> +        exit 1
> +    fi
> +fi
> +
> +if [ ! -r ${STAGING_KERNEL_DIR}/System.map-\$4 ]; then
> +    echo "Unable to read: ${STAGING_KERNEL_DIR}/System.map-\$4" >&2
> +    exec env depmod "\$1" "\$2" "\$3" "\$4"
> +else
> +    exec env depmod "\$1" "\$2" "\$3" -F "${STAGING_KERNEL_DIR}/System.map-\$4" "\$4"
> +fi
> +EOF
> +	chmod +x ${D}${bindir_crossscripts}/depmodwrapper
> +}
> +
> +SYSROOT_PREPROCESS_FUNCS += "depmodwrapper_sysroot_preprocess"
> +
> +depmodwrapper_sysroot_preprocess () {
> +	sysroot_stage_dir ${D}${bindir_crossscripts} ${SYSROOT_DESTDIR}${bindir_crossscripts}
> +}
>