From mboxrd@z Thu Jan 1 00:00:00 1970 From: Harald Hoyer Subject: Re: [PATCH] add readonly overlay support for dmsquash Date: Thu, 04 Mar 2010 14:07:33 +0100 Message-ID: <4B8FB095.8090005@redhat.com> References: <1267195469-32522-1-git-send-email-jboggs@redhat.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1267195469-32522-1-git-send-email-jboggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Sender: initramfs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Joey Boggs Cc: initramfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org On 02/26/2010 03:44 PM, Joey Boggs wrote: > 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 pushed