On Thu, Jun 8, 2023 at 10:26 PM Alexander Mikhalitsyn <aleksandr.mikhalitsyn@xxxxxxxxxxxxx> wrote: > > Implement SCM_PIDFD, a new type of CMSG type analogical to SCM_CREDENTIALS, > but it contains pidfd instead of plain pid, which allows programmers not > to care about PID reuse problem. > > We mask SO_PASSPIDFD feature if CONFIG_UNIX is not builtin because > it depends on a pidfd_prepare() API which is not exported to the kernel > modules. > > Idea comes from UAPI kernel group: > https://uapi-group.org/kernel-features/ > > Big thanks to Christian Brauner and Lennart Poettering for productive > discussions about this. > > 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> > Reviewed-by: Kuniyuki Iwashima <kuniyu@xxxxxxxxxx> > Reviewed-by: Christian Brauner <brauner@xxxxxxxxxx> > Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@xxxxxxxxxxxxx> > --- Reviewed-by: Eric Dumazet <edumazet@xxxxxxxxxx>
