[PATCH] recipes-support: add fsck to initramfs

["Q. Gylstorff" <Quirin.Gylstorff@siemens.com>]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

During system start it shall be possible to check all available file systems.
As debootstrap has no knowledge of the existing file system it will not add all fsck.*
application necessary to the initramfs.
This patch adds all file system types given by IMAGE_FILESYSTEM_TYPES to the initramfs.

File system types in IMAGE_FILESYSTEM_TYPES are separated with spaces.

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 meta/classes/image.bbclass                    |  1 +
 .../files/initramfs.fsck.hook.tmpl            | 45 +++++++++++++++++++
 .../initramfs-fsck-hook/files/postinst        |  6 +++
 .../initramfs-fsck-hook_0.1.bb                | 20 +++++++++
 4 files changed, 72 insertions(+)
 create mode 100644 meta/recipes-support/initramfs-fsck-hook/files/initramfs.fsck.hook.tmpl
 create mode 100644 meta/recipes-support/initramfs-fsck-hook/files/postinst
 create mode 100644 meta/recipes-support/initramfs-fsck-hook/initramfs-fsck-hook_0.1.bb

diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index ec6bd39..4d1feac 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -4,6 +4,7 @@
 PF = "${PN}-${DISTRO}-${MACHINE}"
 
 IMAGE_INSTALL ?= ""
+IMAGE_FILESYSTEM_TYPES ?= "ext4"
 IMAGE_TYPE    ?= "ext4-img"
 IMAGE_ROOTFS ?= "${WORKDIR}/rootfs"
 
diff --git a/meta/recipes-support/initramfs-fsck-hook/files/initramfs.fsck.hook.tmpl b/meta/recipes-support/initramfs-fsck-hook/files/initramfs.fsck.hook.tmpl
new file mode 100644
index 0000000..366160a
--- /dev/null
+++ b/meta/recipes-support/initramfs-fsck-hook/files/initramfs.fsck.hook.tmpl
@@ -0,0 +1,45 @@
+# This software is a part of ISAR.
+# Copyright (C) Siemens AG, 2019
+#
+# SPDX-License-Identifier: MIT
+
+#!/bin/sh
+PREREQ=""
+
+prereqs()
+{
+     echo "$PREREQ"
+}
+
+case $1 in
+prereqs)
+     prereqs
+     exit 0
+     ;;
+esac
+
+. /usr/share/initramfs-tools/scripts/functions
+. /usr/share/initramfs-tools/hook-functions
+
+if [ ! -x /sbin/fsck ]; then
+	echo "Warning: couldn't find /sbin/fsck!"
+	exit 0
+fi
+
+fsck_types="${IMAGE_FILESYSTEM_TYPES}"
+
+copy_exec /sbin/fsck
+copy_exec /sbin/logsave
+
+for type in $fsck_types; do
+	if [ "$type" = "unknown" ] ; then
+		echo "Warning: couldn't identify filesystem type for fsck hook, ignoring."
+		continue
+	fi
+
+	if prog="$(command -v fsck.${type})"; then
+		copy_exec "$prog"
+	else
+		echo "Warning: /sbin/fsck.${type} doesn't exist, can't install to initramfs, ignoring."
+	fi
+done
diff --git a/meta/recipes-support/initramfs-fsck-hook/files/postinst b/meta/recipes-support/initramfs-fsck-hook/files/postinst
new file mode 100644
index 0000000..07bc3d9
--- /dev/null
+++ b/meta/recipes-support/initramfs-fsck-hook/files/postinst
@@ -0,0 +1,6 @@
+#!/bin/sh
+# This software is a part of ISAR.
+# Copyright (C) Siemens AG, 2019
+#
+# SPDX-License-Identifier: MIT
+update-initramfs -u
diff --git a/meta/recipes-support/initramfs-fsck-hook/initramfs-fsck-hook_0.1.bb b/meta/recipes-support/initramfs-fsck-hook/initramfs-fsck-hook_0.1.bb
new file mode 100644
index 0000000..e0da551
--- /dev/null
+++ b/meta/recipes-support/initramfs-fsck-hook/initramfs-fsck-hook_0.1.bb
@@ -0,0 +1,20 @@
+# This software is a part of ISAR.
+# Copyright (C) Siemens AG, 2019
+#
+# SPDX-License-Identifier: MIT
+
+
+DESCRIPTION = "Recipe to add fsck hook to the initramfs"
+
+inherit dpkg-raw
+SRC_URI = "file://postinst \
+           file://initramfs.fsck.hook.tmpl \
+          "
+
+TEMPLATE_VARS += "IMAGE_FILESYSTEM_TYPES"
+TEMPLATE_FILES += "initramfs.fsck.hook.tmpl"
+
+do_install() {
+        install -m 0755 -d ${D}/etc/initramfs-tools/hooks
+        install -m 0740 ${WORKDIR}/initramfs.fsck.hook ${D}/etc/initramfs-tools/hooks/fsck.hook
+}
-- 
2.20.1