On Fri, Sep 15, 2017 at 03:58:05PM +0200, Miklos Szeredi wrote: > And here's the prototype. Poof, d_real() is gone. > > It definitely has got problems, but just maybe it can be made better than the > current mess. It *does* solve the ro-rw inconsistency for normal reads (not > mmaps).
... and makes for mind-boggling amount of opening/closing the files on underlying filesystem. Doing that on sodding ->read_iter() is simply wrong. And you are using the wrong credentials for those opens, anyway - it should be creds of opener, not reader.
