[PATCH v5 bpf-next 0/4] Better handling of xskmap entries

[Jonathan Lemon <jonathan.lemon@gmail.com>]

Currently, the AF_XDP code uses a separate map in order to
determine if an xsk is bound to a queue.  Have the xskmap
lookup return a XDP_SOCK pointer on the kernel side, which
the verifier uses to extract relevant values.

Patches:
 1 - adds XSK_SOCK type
 2 - sync bpf.h with tools
 3 - add tools selftest
 4 - update lib/bpf, removing qidconf

v4->v5:
 - xskmap lookup now returns XDP_SOCK type instead of pointer to element.
 - no changes lib/bpf/xsk.c

v3->v4:
 - Clarify error handling path.

v2->v3:
 - Use correct map type.

Jonathan Lemon (4):
  bpf: Allow bpf_map_lookup_elem() on an xskmap
  bpf/tools: sync bpf.h
  tools/bpf: Add bpf_map_lookup_elem selftest for xskmap
  libbpf: remove qidconf and better support external bpf programs.

 include/linux/bpf.h                           |   8 ++
 include/net/xdp_sock.h                        |   4 +-
 include/uapi/linux/bpf.h                      |   4 +
 kernel/bpf/verifier.c                         |  26 ++++-
 kernel/bpf/xskmap.c                           |   7 ++
 net/core/filter.c                             |  40 +++++++
 tools/include/uapi/linux/bpf.h                |   4 +
 tools/lib/bpf/xsk.c                           | 103 +++++-------------
 .../bpf/verifier/prevent_map_lookup.c         |  15 ---
 tools/testing/selftests/bpf/verifier/sock.c   |  18 +++
 10 files changed, 135 insertions(+), 94 deletions(-)

-- 
2.17.1