[PATCH v2 0/5] Add pidfd support to the fanotify API

[Matthew Bobrowski <repnop@google.com>]

Hey Jan/Amir/Christian,

Sending through v2 of the fanotify pidfd patch series. This series
contains the necessary fixes/suggestions that had come out of the
previous discussions, which can be found here [0], here [1], and here
[3].

The main difference in this series is that we perform pidfd creation a
little earlier on i.e. in copy_event_to_user() so that clean up of the
pidfd can be performed nicely in the event of an info
generation/copying error. Additionally, we introduce two errors. One
being FAN_NOPIDFD, which is supplied to the listener in the event that
a pidfd cannot be created due to early process termination. The other
being FAN_EPIDFD, which will be supplied in the event that an error
was encountered during pidfd creation.

Please let me know what you think.

[0]
https://lore.kernel.org/linux-fsdevel/48d18055deb4617d97c695a08dca77eb57309\
7e9.1621473846.git.repnop@google.com/

[1]
https://lore.kernel.org/linux-fsdevel/24c761bd0bd1618c911a392d0c310c24da7d8\
941.1621473846.git.repnop@google.com/

[2]
https://lore.kernel.org/linux-fsdevel/48d18055deb4617d97c695a08dca77eb57309\
7e9.1621473846.git.repnop@google.com/


Matthew Bobrowski (5):
  kernel/pid.c: remove static qualifier from pidfd_create()
  kernel/pid.c: implement additional checks upon pidfd_create()
    parameters
  fanotify/fanotify_user.c: minor cosmetic adjustments to fid labels
  fanotify/fanotify_user.c: introduce a generic info record copying
    helper
  fanotify: add pidfd support to the fanotify API

 fs/notify/fanotify/fanotify_user.c | 260 +++++++++++++++++++++--------
 include/linux/fanotify.h           |   3 +
 include/linux/pid.h                |   1 +
 include/uapi/linux/fanotify.h      |  13 ++
 kernel/pid.c                       |  15 +-
 5 files changed, 213 insertions(+), 79 deletions(-)

-- 
2.30.2

/M