[PATCH net-next v3 0/3] net: core: Two Helper function about socket information

[Chenbo Feng <chenbofeng.kernel@gmail.com>]

From: Chenbo Feng <fengc@google.com>

Introduce two eBpf helper function to get the socket cookie and
socket uid for each packet. The helper function is useful when
the *sk field inside sk_buff is not empty. These helper functions
can be used on socket and uid based traffic monitoring programs.

Change since V2:
* Add a sample program to demostrate the usage of the helper function.
* Moved the helper function proto invoking place.
* Add function header into tools/include
* Apply sk_to_full_sk() before getting uid.

Change since V1:
* Removed the unnecessary declarations and export command
* resolved conflict with master branch. 
* Examine if the socket is a full socket before getting the uid.

Chenbo Feng (3):
  Add a helper function to get socket cookie in eBPF
  Add a eBPF helper function to retrieve socket uid
  A Sample of using socket cookie and uid for traffic monitoring

 include/linux/sock_diag.h                    |   1 +
 include/uapi/linux/bpf.h                     |  16 +-
 net/core/filter.c                            |  36 +++++
 net/core/sock_diag.c                         |   2 +-
 samples/bpf/cookie_uid_helper_example.c      | 225 +++++++++++++++++++++++++++
 samples/bpf/run_cookie_uid_helper_example.sh |  14 ++
 tools/include/uapi/linux/bpf.h               |   4 +-
 7 files changed, 295 insertions(+), 3 deletions(-)
 create mode 100644 samples/bpf/cookie_uid_helper_example.c
 create mode 100755 samples/bpf/run_cookie_uid_helper_example.sh

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2.7.4