Lennart Poettering
b6904196a6
For nspawn and services we first turn off two-way propagation of mounts from host to sandbox via MS_SLAVE, and then set MS_SHARED again, so that we create a new mount prop peer group again, and that we provide behaviour similar to what we provide on the host further down the tree. Let's do the same in detach_mount_namespace(), which we use for the temporary mounts in the implementation of --image= in various tools. This doesn't fix any immediate issue, but ensures we expose somewhat systematic behaviour: whenever we detach mount namespaces we always set things back to MS_SLAVE in the child.
System and Service Manager
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