netdev - [PATCH net-next 0/4] bpf: Add map-in-map support

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Date:   Wed, 22 Mar 2017 10:00:31 -0700
From:   Martin KaFai Lau <kafai@...com>
To:     netdev <netdev@...r.kernel.org>
CC:     Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        FB Kernel Team <Kernel-team@...com>
Subject: [PATCH net-next 0/4] bpf: Add map-in-map support

This patchset adds map-in-map support (map->map).
One use case is the (vips -> webservers) in the L4 load balancer so
that different vips can be backed by different set of webservers.

Please refer to the individual commit log for details.

Martin KaFai Lau (4):
  bpf: Fix and simplifications on inline map lookup
  bpf: Add array of maps support
  bpf: Add hash of maps support
  bpf: Add tests for map-in-map

 include/linux/bpf.h                         |   3 +
 include/uapi/linux/bpf.h                    |   3 +
 kernel/bpf/Makefile                         |   2 +-
 kernel/bpf/arraymap.c                       |  74 ++++++++++--
 kernel/bpf/hashtab.c                        | 121 +++++++++++++++++++
 kernel/bpf/map_in_map.c                     |  97 ++++++++++++++++
 kernel/bpf/map_in_map.h                     |  23 ++++
 kernel/bpf/syscall.c                        |  13 ++-
 kernel/bpf/verifier.c                       |  57 +++++++--
 samples/bpf/Makefile                        |   4 +
 samples/bpf/bpf_helpers.h                   |   1 +
 samples/bpf/bpf_load.c                      |  22 +++-
 samples/bpf/test_map_in_map_kern.c          | 173 ++++++++++++++++++++++++++++
 samples/bpf/test_map_in_map_user.c          | 116 +++++++++++++++++++
 tools/include/uapi/linux/bpf.h              |   3 +
 tools/lib/bpf/bpf.c                         |  17 +++
 tools/lib/bpf/bpf.h                         |   2 +
 tools/testing/selftests/bpf/test_verifier.c | 131 ++++++++++++++++++---
 18 files changed, 823 insertions(+), 39 deletions(-)
 create mode 100644 kernel/bpf/map_in_map.c
 create mode 100644 kernel/bpf/map_in_map.h
 create mode 100644 samples/bpf/test_map_in_map_kern.c
 create mode 100644 samples/bpf/test_map_in_map_user.c

-- 
2.9.3