[PATCH bpf-next v2 0/3] AF_XDP: add socket monitoring support

[bjorn.topel@gmail.com]

From: Björn Töpel <bjorn.topel@intel.com>

This series adds an AF_XDP sock_diag interface for querying sockets
from user-space. Tools like iproute2 ss(8) can use this interface to
list open AF_XDP sockets.

The diagnostic provides information about the Rx/Tx/fill/completetion
rings, umem, memory usage and such. For a complete list, please refer
to the xsk_diag.c file.

The AF_XDP sock_diag interface is optional, and can be built as a
module.

A separate patch series, adding ss(8) iproute2 support, will follow.

v1->v2: * Removed extra newline
        * Zero-out all user-space facing structures prior setting the
          members
        * Added explicit "pad" member in _msg struct
        * Removed unused variable "req" in xsk_diag_handler_dump()

Thanks to Daniel for reviewing the series! 

Cheers,
Björn


Björn Töpel (3):
  net: xsk: track AF_XDP sockets on a per-netns list
  xsk: add id to umem
  xsk: add sock_diag interface for AF_XDP

 include/net/net_namespace.h   |   4 +
 include/net/netns/xdp.h       |  13 +++
 include/net/xdp_sock.h        |   1 +
 include/uapi/linux/xdp_diag.h |  72 +++++++++++++
 net/xdp/Kconfig               |   8 ++
 net/xdp/Makefile              |   1 +
 net/xdp/xdp_umem.c            |  13 +++
 net/xdp/xsk.c                 |  36 ++++++-
 net/xdp/xsk.h                 |  12 +++
 net/xdp/xsk_diag.c            | 191 ++++++++++++++++++++++++++++++++++
 10 files changed, 346 insertions(+), 5 deletions(-)
 create mode 100644 include/net/netns/xdp.h
 create mode 100644 include/uapi/linux/xdp_diag.h
 create mode 100644 net/xdp/xsk.h
 create mode 100644 net/xdp/xsk_diag.c

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2.19.1