initramfs-framework: support ro boot parameter

Default is to mount the rootfs read/write. "ro" can be used to turn
that into read-only, which is useful on systems where userspace does
an fsck before remounting read-write.

Giving both "ro" and "rw" will still mount read-only regardless of the
order, because the ordering information is not preserved by the
initramfs-framework's boot param support.

Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/finish b/meta/recipes-core/initrdscripts/initramfs-framework/finish
index 006aef202fe8cbebc0fe702ecf96e0272c9c745a..a8806aa3afa85d43bada720fe78fcecbf2c94de2 100755 (executable)
--- a/meta/recipes-core/initrdscripts/initramfs-framework/finish
+++ b/meta/recipes-core/initrdscripts/initramfs-framework/finish
@@ -23,6 +23,12 @@ finish_run() {
 
                        if [ -e "$bootparam_root" ]; then
                                flags=""
+                               if [ -n "$bootparam_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