This allows creation of initramfs images which contain a Live system.
The primary use for this is keeping very large initramfs-based systems
(e.g. anaconda, the Fedora installer) compressed in-memory, by using a
compressed filesystem image like squashfs or btrfs.
dmsquash-live-genrules.sh will initqueue dmsquash-live-root itself
(rather than making udev rules) if the given live "device" is actually
an existing, plain file.
parse-dmsquash-live.sh will only accept paths that end in ".img".
dmsquash-live-root will only handle images named "*squashfs.img",
"*ext3fs.img", or "*btrfs.img".
---
.../90dmsquash-live/dmsquash-live-genrules.sh | 12 ++++++++++--
modules.d/90dmsquash-live/dmsquash-live-root | 18 +++++++++++++-----
modules.d/90dmsquash-live/parse-dmsquash-live.sh | 2 ++
3 files changed, 25 insertions(+), 7 deletions(-)
diff --git a/modules.d/90dmsquash-live/dmsquash-live-genrules.sh
b/modules.d/90dmsquash-live/dmsquash-live-genrules.sh
index 72695a9..5642d53 100755
--- a/modules.d/90dmsquash-live/dmsquash-live-genrules.sh
+++ b/modules.d/90dmsquash-live/dmsquash-live-genrules.sh
@@ -1,7 +1,8 @@
#!/bin/sh
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
-if [ "${root%%:*}" = "live" ]; then
+case "$root" in
+ live:/dev/*)
{
printf 'KERNEL=="%s", SYMLINK+="live"\n' \
${root#live:/dev/}
@@ -15,4 +16,11 @@ if [ "${root%%:*}" = "live" ]; then
${root#live:/dev/}
} >> /etc/udev/rules.d/99-live-squash.rules
echo '[ -e /dev/root ]' > /initqueue-finished/dmsquash.sh
-fi
+ ;;
+ live:*)
+ if [ -f "${root#live:}" ]; then
+ /sbin/initqueue --settled --onetime --unique /sbin/dmsquash-live-root
"${root#live:}"
+ echo '[ -e /dev/root ]' > /initqueue-finished/dmsquash.sh
+ fi
+ ;;
+esac
diff --git a/modules.d/90dmsquash-live/dmsquash-live-root
b/modules.d/90dmsquash-live/dmsquash-live-root
index f8aa805..c857e48 100755
--- a/modules.d/90dmsquash-live/dmsquash-live-root
+++ b/modules.d/90dmsquash-live/dmsquash-live-root
@@ -44,11 +44,19 @@ getarg rw && liverw=rw
[ -z "$liverw" ] && liverw=ro
# mount the backing of the live image first
mkdir -p /dev/.initramfs/live
-mount -n -t $fstype -o $liverw $livedev /dev/.initramfs/live
-RES=$?
-if [ "$RES" != "0" ]; then
- die "Failed to mount block device of live image"
- exit 1
+if [ -f $livedev ]; then
+ # no mount needed - we've already got the LiveOS image in initramfs
+ case $livedev in
+ *squashfs.img) SQUASHED=$livedev ;;
+ *ext3fs.img|*btrfs.img) FSIMG=$livedev ;;
+ esac
+else
+ mount -n -t $fstype -o $liverw $livedev /dev/.initramfs/live
+ RES=$?
+ if [ "$RES" != "0" ]; then
+ die "Failed to mount block device of live image"
+ exit 1
+ fi
fi
# overlay setup helper function
diff --git a/modules.d/90dmsquash-live/parse-dmsquash-live.sh
b/modules.d/90dmsquash-live/parse-dmsquash-live.sh
index 38610fb..6e0db29 100755
--- a/modules.d/90dmsquash-live/parse-dmsquash-live.sh
+++ b/modules.d/90dmsquash-live/parse-dmsquash-live.sh
@@ -38,6 +38,8 @@ case "$liveroot" in
rootok=1 ;;
live:/dev/*)
rootok=1 ;;
+ live:/*.[Ii][Mm][Gg]|/*.[Ii][Mm][Gg])
+ [ -f "${root#live:}" ] && rootok=1 ;;
esac
info "root was $root, liveroot is now $liveroot"
--
1.7.4
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