netdev - [PATCH v5 bpf-next 0/2] bpf: adding support for mapinmap in libbpf

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Message-Id: <20181121045557.17924-1-tehnerd@tehnerd.com>
Date:   Tue, 20 Nov 2018 20:55:55 -0800
From:   "Nikita V. Shirokov" <tehnerd@...nerd.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     netdev@...r.kernel.org, "Nikita V. Shirokov" <tehnerd@...nerd.com>
Subject: [PATCH v5 bpf-next 0/2] bpf: adding support for mapinmap in libbpf

in this patch series i'm adding a helper for libbpf which would allow
it to load map-in-map(BPF_MAP_TYPE_ARRAY_OF_MAPS and
BPF_MAP_TYPE_HASH_OF_MAPS).
first patch contains new helper + explains proposed workflow
second patch contains tests which also could be used as example of usage

v4->v5:
 - naming: renamed everything to map_in_map instead of mapinmap
 - start to return nonzero val if set_inner_map_fd failed

v3->v4:
 - renamed helper to set_inner_map_fd
 - now we set this value only if it haven't
   been set before and only for (array|hash) of maps

v2->v3:
 - fixing typo in patch description
 - initializing inner_map_fd to -1 by default

v1->v2:
 - addressing nits
 - removing const identifier from fd in new helper
 - starting to check return val for bpf_map_update_elem

Nikita V. Shirokov (2):
  bpf: adding support for map in map in libbpf
  bpf: adding tests for mapinmap helpber in libbpf

 tools/lib/bpf/libbpf.c                        | 40 ++++++++++--
 tools/lib/bpf/libbpf.h                        |  2 +
 tools/testing/selftests/bpf/Makefile          |  3 +-
 tools/testing/selftests/bpf/test_map_in_map.c | 49 +++++++++++++++
 tools/testing/selftests/bpf/test_maps.c       | 90 +++++++++++++++++++++++++++
 5 files changed, 177 insertions(+), 7 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/test_map_in_map.c

-- 
2.15.1