efiboot: add new mount namespace helper

to re-execute the currently running script in an unshared mount name
space.

Co-Developed-By: Thomas Lamprecht <t.lamprecht@proxmox.com>
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

diff --git a/efiboot/functions b/efiboot/functions
index cb6cd621109d42877b60fe89a3860d1061c71dba..79062d8ddd6431207bd7815e85e634a656463b60 100755 (executable)
--- a/efiboot/functions
+++ b/efiboot/functions
@@ -63,3 +63,12 @@ boot_kernel_list() {
 warn() {
        echo "$@" 1>&2
 }
+
+reexec_in_mountns() {
+       if [ -z "$PVE_EFIBOOT_UNSHARED" ]; then
+               export PVE_EFIBOOT_UNSHARED=1
+               echo "Re-executing '$0' in new private mount namespace.."
+               unshare --mount --propagation private "$0" "$@"
+               exit 0
+       fi
+}