From 622fe63eb37f957ee5c29684e24f1d2d636fd086 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@open-infrastructure.net>
Date: Mon, 3 Apr 2017 11:57:55 +0200
Subject: Adding support for bind-ro nspawn option for read-only bind mounts.

Signed-off-by: Daniel Baumann <daniel.baumann@open-infrastructure.net>
---
 share/scripts/debconf | 42 +++++++++++++++++++++++++++++++++++++++---
 1 file changed, 39 insertions(+), 3 deletions(-)

(limited to 'share/scripts/debconf')

diff --git a/share/scripts/debconf b/share/scripts/debconf
index 6d0410a..df9241c 100755
--- a/share/scripts/debconf
+++ b/share/scripts/debconf
@@ -26,7 +26,7 @@ MACHINES="/var/lib/machines"
 
 Parameters ()
 {
-	GETOPT_LONGOPTIONS="bind:,script:,name:,preseed-file:"
+	GETOPT_LONGOPTIONS="bind:,bind-ro:,script:,name:,preseed-file:"
 	GETOPT_OPTIONS="b:,s:,n:,p:"
 
 	PARAMETERS="$(getopt --longoptions ${GETOPT_LONGOPTIONS} --name=${SCRIPT} --options ${GETOPT_OPTIONS} --shell sh -- ${@})"
@@ -47,6 +47,11 @@ Parameters ()
 				shift 2
 				;;
 
+			--bind-ro)
+				# ignore
+				shift 2
+				;;
+
 			--cnt.auto)
 				# ignore
 				shift 2
@@ -911,6 +916,7 @@ Commands ()
 	sed -i -e "s|^cnt.network-bridge=.*|cnt.network-bridge=${HOST_INTERFACE_NAME}:${NETWORK0_BRIDGE:-br0}|g" "${CONFIG}/${NAME}.conf"
 	sed -i -e "s|^cnt.overlay=.*|cnt.overlay=${CNT_OVERLAY}|g" "${CONFIG}/${NAME}.conf"
 	sed -i -e "s|^bind=.*|bind=${BIND}|" "${CONFIG}/${NAME}.conf"
+	sed -i -e "s|^bind-ro=.*|bind-ro=${BIND_RO}|" "${CONFIG}/${NAME}.conf"
 	sed -i -e "s|^network-veth-extra=.*|network-veth-extra=${HOST_INTERFACE_NAME}:eth0|g" "${CONFIG}/${NAME}.conf"
 
 	for NUMBER in $(seq 1 ${NETWORK_NUMBER})
@@ -1003,7 +1009,7 @@ Cleanup_system "${CACHE}/${DISTRIBUTION}_${ARCHITECTURE}"
 mkdir -p "${MACHINES}"
 cp -a "${CACHE}/${DISTRIBUTION}_${ARCHITECTURE}" "${MACHINES}/${NAME}"
 
-# Mounting bind mounts
+# Mounting rw bind mounts
 if [ -n "${BIND}" ]
 then
 	BINDS="$(echo ${BIND} | sed -e 's|;| |g')"
@@ -1020,6 +1026,23 @@ then
 	done
 fi
 
+# Mounting ro bind mounts
+if [ -n "${BIND_RO}" ]
+then
+	BINDS_RO="$(echo ${BIND_RO} | sed -e 's|;| |g')"
+
+	for ENTRY in ${BINDS_RO}
+	do
+		SOURCE="$(echo ${ENTRY} | awk -F: '{ print $1 }')"
+		TARGET="$(echo ${ENTRY} | awk -F: '{ print $2 }')"
+
+		mkdir -p "${SOURCE}"
+		mkdir -p "${MACHINES}/${NAME}/${TARGET}"
+
+		mount -o rbind "${SOURCE}" "${MACHINES}/${NAME}/${TARGET}"
+	done
+fi
+
 # Mounting overlay mounts
 if [ -n "${CNT_OVERLAY}" ]
 then
@@ -1069,7 +1092,20 @@ then
 	done
 fi
 
-# Unmounting bind mounts
+# Unmounting ro bind mounts
+if [ -n "${BIND_RO}" ]
+then
+	BINDS_RO="$(echo ${BIND_RO} | sed -e 's|;| |g')"
+
+	for ENTRY in ${BINDS_RO}
+	do
+		TARGET="$(echo ${ENTRY} | awk -F: '{ print $2 }')"
+
+		umount "${MACHINES}/${NAME}/${TARGET}"
+	done
+fi
+
+# Unmounting rw bind mounts
 if [ -n "${BIND}" ]
 then
 	BINDS="$(echo ${BIND} | sed -e 's|;| |g')"
-- 
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