linux-kernel - [PATCH v2 0/2] pidfd: waiting on processes through pidfds

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Date:   Sat, 27 Jul 2019 10:51:59 +0200
From:   Christian Brauner <christian@...uner.io>
To:     linux-kernel@...r.kernel.org, oleg@...hat.com
Cc:     arnd@...db.de, ebiederm@...ssion.com, keescook@...omium.org,
        joel@...lfernandes.org, tglx@...utronix.de, tj@...nel.org,
        dhowells@...hat.com, jannh@...gle.com, luto@...nel.org,
        akpm@...ux-foundation.org, cyphar@...har.com,
        torvalds@...ux-foundation.org, viro@...iv.linux.org.uk,
        kernel-team@...roid.com, Christian Brauner <christian@...uner.io>
Subject: [PATCH v2 0/2] pidfd: waiting on processes through pidfds

Hey everyone,

/* v2 */
This adds the ability to wait on processes using pidfds. This is one of
the few missing pieces to make it possible to manage processes using
only pidfds.

Now major changes have occured since v1. The only thing that was changed
has been to move all find_get_pid() calls into the switch statement to
avoid checking the type argument twice as suggested by Linus.

The core patch for waitid is pleasantly small. The largest change is
caused by adding proper tests for waitid(P_PIDFD).

/* v1 */
Link: https://lore.kernel.org/lkml/20190726093934.13557-1-christian@brauner.io/

/* v0 */
Link: https://lore.kernel.org/lkml/20190724144651.28272-1-christian@brauner.io

Christian

Christian Brauner (2):
  pidfd: add P_PIDFD to waitid()
  pidfd: add pidfd_wait tests

 include/linux/pid.h                        |   4 +
 include/uapi/linux/wait.h                  |   1 +
 kernel/exit.c                              |  29 ++-
 kernel/fork.c                              |   8 +
 kernel/signal.c                            |   7 +-
 tools/testing/selftests/pidfd/pidfd.h      |  25 +++
 tools/testing/selftests/pidfd/pidfd_test.c |  14 --
 tools/testing/selftests/pidfd/pidfd_wait.c | 245 +++++++++++++++++++++
 8 files changed, 313 insertions(+), 20 deletions(-)
 create mode 100644 tools/testing/selftests/pidfd/pidfd_wait.c

-- 
2.22.0