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    SubjectRe: [rfc] fcntl: Add F_GETOWNER_UIDS option
    Quoting Oleg Nesterov (
    > On 03/28, Serge E. Hallyn wrote:
    > >
    > > If you want to
    > > just add the struct cred to the f_owner and do proper uid conversion,
    > > I'll support that too. (Just grab a ref to the cred in
    > > fs/fcntl.c:f_modown(), and drop the ref in fs/file_table.c:__fput() ).
    > In this case f_owner.*uid should go away, I guess.


    Which I guess is all the more reason *not* to do this unless we end up
    not going with Eric's userns mapping patchset (which is unlikely).

    > And sigio_perm()
    > should be unified with kill_ok_by_cred() somehow (modulo
    > security_file_send_sigiotask).
    > Right?

    Maybe, but other differences include current being the signal sender in
    one and recipient in the other, and CAP_KILL being relevent in only


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