Hello!
We are currently developing a snapshot feature for a small university
project. And for this reason we are looking for a way to swap out the
root inode of our (mounted) fs.
Internally we have a set of root inodes and we'd like to swap them out
at will without unmounting the entire filesystem.
Is there any function/way how to do this properly?
So far we tried the following:
-> swapping dentry: setting sb->s_root
-> causes a lot of problems regarding inode ref counting (I_CLEAR flag)
-> looking into fs_context (doesnt seem like this is appropriate here)
-> we did not find anything related within the vfs.rst docs
Furthermore, we cannot mount those other root inodes at different
mountpoints. All changes have to be live and in-place.
Kind regards
