What about file sealing?

See:

Jonathan Corbet's article about sealed files (2014-04-09). https://lwn.net/Articles/593918/.

Theodore Ts'o reply to file sealing patch suggesting an implementation on VFS (2014-03-20). Re: [PATCH 0/6] File Sealing & memfd_create() https://lwn.net/Articles/593963/.

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