initramfs-framework: module to support boot live image

setup-live module is a new module being introduced to integrate the
functionality of init-live.sh into new scriptlet named setup-live in
order to support the live boot image. The udev-extraconf rdepends is
being added to perform automounting. It gets to run before the rootfs
and finish module.

The setup-live scriplet include the changes for:

- Create a conditional loop for the bootparam_root variable. If it is
not set, then it will boot from ROOT_IMAGE. Else, it will boot normally
which is not from removable media.

- Gives a standard path to the original boot disk mount which can be
used to. While /media/sda is a good guess, it isn't always right, nor
is it a good assumption that only one boot disk is in the system.

- The current rootfs module has no support for rootfs images, currently
it only support for rootfs partitions for wic image. Therefore, there
is a need to assign the rootfs image for live image.

[YOCTO #11701]

(From OE-Core rev: 4d3300e85a8e65207a415b9cf84c9fa1f71b0406)

Signed-off-by: Ng, Wei Tee <wei.tee.ng@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 77 insertions, 2 deletions

diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/setup-live b/meta/recipes-core/initrdscripts/initramfs-framework/setup-live
new file mode 100644
index 0000000000..ec4a139084
--- /dev/null
+++ b/meta/recipes-core/initrdscripts/initramfs-framework/setup-live
@@ -0,0 +1,66 @@
+#/bin/sh
+# Copyright (C) 2011 O.S. Systems Software LTDA.
+# Licensed on MIT
+
+setup_enabled() {
+        return 0
+}
+
+setup_run() {
+ROOT_IMAGE="rootfs.img"
+ISOLINUX=""
+ROOT_DISK=""
+shelltimeout=30
+
+        if [ -z $bootparam_root ]; then
+                echo "Waiting for removable media..."
+                C=0
+                while true
+                do
+                  for i in `ls /run/media 2>/dev/null`; do
+                      if [ -f /run/media/$i/$ROOT_IMAGE ] ; then
+                                found="yes"
+                                ROOT_DISK="$i"
+                                break
+                          elif [ -f /run/media/$i/isolinux/$ROOT_IMAGE ]; then
+                                found="yes"
+                                ISOLINUX="isolinux"
+                                ROOT_DISK="$i"
+                                break
+                      fi
+                  done
+                  if [ "$found" = "yes" ]; then
+                      break;
+                  fi
+                  # don't wait for more than $shelltimeout seconds, if it's set
+                  if [ -n "$shelltimeout" ]; then
+                      echo -n " " $(( $shelltimeout - $C ))
+                      if [ $C -ge $shelltimeout ]; then
+                           echo "..."
+                           echo "Mounted filesystems"
+                           mount | grep media
+                           echo "Available block devices"
+                           cat /proc/partitions
+                           fatal "Cannot find $ROOT_IMAGE file in /run/media/* , dropping to a shell "
+                      fi
+                      C=$(( C + 1 ))
+                  fi
+                  sleep 1
+                done
+                # The existing rootfs module has no support for rootfs images. Assign the rootfs image.
+                bootparam_root="/run/media/$ROOT_DISK/$ISOLINUX/$ROOT_IMAGE"
+        else
+                break
+        fi
+
+        if [ "$bootparam_LABEL" != "boot" -a -f /init.d/$bootparam_LABEL.sh ] ; then
+                if [ -f /run/media/$i/$ISOLINUX/$ROOT_IMAGE ] ; then
+                    ./init.d/$bootparam_LABEL.sh $i/$ISOLINUX $ROOT_IMAGE $video_mode $vga_mode $console_params
+                else
+                    fatal "Could not find $bootparam_LABEL script"
+                fi
+
+                # If we're getting here, we failed...
+                fatal "Target $bootparam_LABEL failed"
+        fi
+}
diff --git a/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb b/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb
index 67a1b04d28..211e89d5d3 100644
--- a/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb
+++ b/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb
@@ -13,7 +13,8 @@ SRC_URI = "file://init \
            file://mdev \
            file://udev \
            file://e2fs \
-           file://debug"
+           file://debug \
+           file://setup-live"
 
 S = "${WORKDIR}"
 
@@ -25,6 +26,9 @@ do_install() {
     install -m 0755 ${WORKDIR}/rootfs ${D}/init.d/90-rootfs
     install -m 0755 ${WORKDIR}/finish ${D}/init.d/99-finish
 
+    # setup-live
+    install -m 0755 ${WORKDIR}/setup-live ${D}/init.d/80-setup-live
+
     # mdev
     install -m 0755 ${WORKDIR}/mdev ${D}/init.d/01-mdev
 
@@ -48,7 +52,8 @@ PACKAGES = "${PN}-base \
             initramfs-module-udev \
             initramfs-module-e2fs \
             initramfs-module-rootfs \
-            initramfs-module-debug"
+            initramfs-module-debug \
+            initramfs-module-setup-live"
 
 FILES_${PN}-base = "/init /init.d/99-finish /dev"
 
@@ -68,6 +73,10 @@ SUMMARY_initramfs-module-udev = "initramfs support for udev"
 RDEPENDS_initramfs-module-udev = "${PN}-base udev"
 FILES_initramfs-module-udev = "/init.d/01-udev"
 
+SUMMARY_initramfs-module-setup-live = "initramfs support for setup live"
+RDEPENDS_initramfs-module-setup-live = "${PN}-base udev-extraconf"
+FILES_initramfs-module-setup-live = "/init.d/80-setup-live"
+
 SUMMARY_initramfs-module-e2fs = "initramfs support for ext4/ext3/ext2 filesystems"
 RDEPENDS_initramfs-module-e2fs = "${PN}-base"
 FILES_initramfs-module-e2fs = "/init.d/10-e2fs"