Re: [RFC PATCH] Show data flow for file copyup in unions

[J. R. Okajima]

Valerie Aurora:
> 1. Don't copyup if the operation would fail (e.g., open(O_WRONLY) on a
> file with mode 444).  It's inefficient and a possible security hole to
> copy up a file if no write (or maybe even read) can occur anyway.

Just a question.
How about this case?
When the file is writable (0644 or something) but its parent directory
is readonly (0555), do you think the file should be copied-up?


J. R. Okajima
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