[OE-core] [PATCH] initramfs-framework: add nfsrootfs module

[Oleksii Konoplitskyi]

Hi Andre,


Could you, please, check if all the features that we discussed in 
https://patchwork.openembedded.org/patch/149212/ are implemented in this 
patch?


Best regards,

Oleksii


On 25.05.18 16:56, Oleksii Konoplitskyi wrote:
> nfsrootfs module mounts rootfs via nfs parsing "nfsroot" and "ip" cmdline options.
>
> Signed-off-by: Oleksii Konoplitskyi <okonopli at cisco.com>
> ---
>   .../initrdscripts/initramfs-framework/nfsrootfs    | 48 ++++++++++++++++++++++
>   .../initrdscripts/initramfs-framework_1.0.bb       |  7 ++++
>   2 files changed, 55 insertions(+)
>   create mode 100644 meta/recipes-core/initrdscripts/initramfs-framework/nfsrootfs
>
> diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/nfsrootfs b/meta/recipes-core/initrdscripts/initramfs-framework/nfsrootfs
> new file mode 100644
> index 0000000..e67ee4c
> --- /dev/null
> +++ b/meta/recipes-core/initrdscripts/initramfs-framework/nfsrootfs
> @@ -0,0 +1,48 @@
> +#!/bin/sh
> +
> +nfsrootfs_enabled() {
> +	if [ ${bootparam_root} != "/dev/nfs" ] || [ -z ${bootparam_nfsroot} ]; then
> +		return 1
> +	fi
> +	return 0
> +}
> +
> +nfsrootfs_run() {
> +	local nfs_opts
> +	local location
> +	local flags
> +	local server_ip
> +
> +	nfs_opts=""
> +	if [ "${bootparam_nfsroot#*,}" != "${bootparam_nfsroot}" ]; then
> +		nfs_opts="-o ${bootparam_nfsroot#*,}"
> +	fi
> +
> +	location="${bootparam_nfsroot%%,*}"
> +	if [ "${location#*:}" = "${location}" ]; then
> +		# server-ip not given. Get server ip from ip option
> +		server_ip=""
> +		if [ "${bootparam_ip#*:}" != "${bootparam_ip}" ]; then
> +			server_ip=$(echo "$bootparam_ip" | cut -d: -f2)
> +		fi
> +
> +		if [ -z "$server_ip" ]; then
> +			fatal "Server IP is not set. Update ip or nfsroot options."
> +		fi
> +		location=${server_ip}:${location}
> +	fi
> +
> +	flags="-o nolock"
> +	if [ -n "$bootparam_ro" ] && ! echo "$bootparam_rootflags" | grep -w -q "ro"; then
> +		if [  -n "$bootparam_rootflags" ]; then
> +			bootparam_rootflags="$bootparam_rootflags,"
> +		fi
> +		bootparam_rootflags="${bootparam_rootflags}ro"
> +	fi
> +	if [ -n "$bootparam_rootflags" ]; then
> +		flags="$flags -o $bootparam_rootflags"
> +	fi
> +
> +	mount -t nfs ${flags} ${nfs_opts} ${location} ${ROOTFS_DIR}
> +}
> +
> diff --git a/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb b/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb
> index 75d965f..6337b99 100644
> --- a/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb
> +++ b/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb
> @@ -9,6 +9,7 @@ inherit allarch
>   
>   SRC_URI = "file://init \
>              file://exec \
> +           file://nfsrootfs \
>              file://rootfs \
>              file://finish \
>              file://mdev \
> @@ -24,6 +25,7 @@ do_install() {
>   
>       # base
>       install -m 0755 ${WORKDIR}/init ${D}/init
> +    install -m 0755 ${WORKDIR}/nfsrootfs ${D}/init.d/85-nfsrootfs
>       install -m 0755 ${WORKDIR}/rootfs ${D}/init.d/90-rootfs
>       install -m 0755 ${WORKDIR}/finish ${D}/init.d/99-finish
>   
> @@ -53,6 +55,7 @@ PACKAGES = "${PN}-base \
>               initramfs-module-mdev \
>               initramfs-module-udev \
>               initramfs-module-e2fs \
> +            initramfs-module-nfsrootfs \
>               initramfs-module-rootfs \
>               initramfs-module-debug \
>              "
> @@ -83,6 +86,10 @@ SUMMARY_initramfs-module-e2fs = "initramfs support for ext4/ext3/ext2 filesystem
>   RDEPENDS_initramfs-module-e2fs = "${PN}-base"
>   FILES_initramfs-module-e2fs = "/init.d/10-e2fs"
>   
> +SUMMARY_initramfs-module-nfsrootfs = "initramfs support for locating and mounting the root partition via nfs"
> +RDEPENDS_initramfs-module-nfsrootfs = "${PN}-base"
> +FILES_initramfs-module-nfsrootfs = "/init.d/85-nfsrootfs"
> +
>   SUMMARY_initramfs-module-rootfs = "initramfs support for locating and mounting the root partition"
>   RDEPENDS_initramfs-module-rootfs = "${PN}-base"
>   FILES_initramfs-module-rootfs = "/init.d/90-rootfs"