On Thu, Apr 13, 2023 at 03:33:54PM +0200, Alexander Mikhalitsyn wrote: > Add SO_PEERPIDFD which allows to get pidfd of peer socket holder pidfd. > This thing is direct analog of SO_PEERCRED which allows to get plain PID. > > Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> > Cc: Eric Dumazet <edumazet@xxxxxxxxxx> > Cc: Jakub Kicinski <kuba@xxxxxxxxxx> > Cc: Paolo Abeni <pabeni@xxxxxxxxxx> > Cc: Leon Romanovsky <leon@xxxxxxxxxx> > Cc: David Ahern <dsahern@xxxxxxxxxx> > Cc: Arnd Bergmann <arnd@xxxxxxxx> > Cc: Kees Cook <keescook@xxxxxxxxxxxx> > Cc: Christian Brauner <brauner@xxxxxxxxxx> > Cc: Kuniyuki Iwashima <kuniyu@xxxxxxxxxx> > Cc: Lennart Poettering <mzxreary@xxxxxxxxxxx> > Cc: Luca Boccassi <bluca@xxxxxxxxxx> > Cc: linux-kernel@xxxxxxxxxxxxxxx > Cc: netdev@xxxxxxxxxxxxxxx > Cc: linux-arch@xxxxxxxxxxxxxxx > Tested-by: Luca Boccassi <bluca@xxxxxxxxxx> > Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@xxxxxxxxxxxxx> > --- > v4: > - return -ESRCH if sk->sk_peer_pid is NULL from getsockopt() syscall > - return errors from pidfd_prepare() as it is from getsockopt() syscall I see no obvious issues anymore, Reviewed-by: Christian Brauner <brauner@xxxxxxxxxx>
