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  1. Bug #1531747
  2. Comment #13

Comment 13 for bug 1531747

Revision history for this message
Serge Hallyn (serge-hallyn) wrote : Re: [Bug 1531747] Re: overlay: mkdir fails if directory exists in lowerdir in a user namespace

in ovl_clear_empty(), the opaque bit is set on the dir in workingdir

in ovl_create_over_whiteout() (the case we're currently looking at) it is
also being set in the working dir.

in ovl_rename2(), it is set in two places, on the upper dentries for
both the old and new.

So it is never set on the lowerdir, at least.

I'm still looking, but it may be safe to say that all needed inode
checks are already done before we call ovl_set_opaque() so that we
can indeed just use prepare_kernel_cred(NULL) instead of prepare_cred().