5af403be0c
We want to support extending the read-only state to cover `/sysroot` and `/boot`, since conceptually all of the data there should only be written via libostree. Or at least for `/boot` should *mostly* just be written by ostree. This change needs to be opt-in though to avoid breaking anyone. Add a `sysroot/readonly` key to the repository config which instructs `ostree-remount.service` to ensure `/sysroot` is read-only. This requires a bit of a dance because `/sysroot` is actually the same filesystem as `/`; so we make `/etc` a writable bind mount in this case. We also need to handle `/var` in the "OSTree default" case of a bind mount; the systemd generator now looks at the writability state of `/sysroot` and uses that to determine whether it should have the `var.mount` unit happen before or after `ostree-remount.service.` Also add an API to instruct the libostree shared library that the caller has created a new mount namespace. This way we can freely remount read-write. This approach extends upon in a much better way previous work we did to support remounting `/boot` read-write. Closes: https://github.com/ostreedev/ostree/issues/1265 |
||
|---|---|---|
| .. | ||
| ostree-mount-util.h | ||
| ostree-prepare-root.c | ||
| ostree-remount.c | ||
| ostree-system-generator.c | ||
| switchroot.sh | ||