Adds the readonly_overlay karg for cases where the dm snapshot should be set to readonly. Use case would be a livecd that is configured to have a readonly root where filling up the dm snapshot would cause a problem.
---
modules.d/90dmsquash-live/dmsquash-live-root | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/modules.d/90dmsquash-live/dmsquash-live-root b/modules.d/90dmsquash-live/dmsquash-live-root
index acec91d..f40e048 100755
--- a/modules.d/90dmsquash-live/dmsquash-live-root
+++ b/modules.d/90dmsquash-live/dmsquash-live-root
@@ -20,6 +20,7 @@ live_dir=$(getarg live_dir)
[ -z "$live_dir" ] && live_dir="LiveOS"
getarg live_ram && live_ram="yes"
getarg reset_overlay && reset_overlay="yes"
+getarg readonly_overlay && readonly_overlay="--readonly" || readonly_overlay=""
overlay=$(getarg overlay)
# FIXME: we need to be able to hide the plymouth splash for the check really
@@ -95,7 +96,7 @@ do_live_overlay() {
fi
# set up the snapshot
- echo 0 `blockdev --getsize $BASE_LOOPDEV` snapshot $BASE_LOOPDEV $OVERLAY_LOOPDEV p 8 | dmsetup create live-rw
+ echo 0 `blockdev --getsize $BASE_LOOPDEV` snapshot $BASE_LOOPDEV $OVERLAY_LOOPDEV p 8 | dmsetup create $readonly_overlay live-rw
}
# live cd helper function
--
1.6.6.1
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