linux-kernel - [PATCH bpf-next 0/2] libbpf: add an option to reuse maps when loading a program

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Message-Id: <cover.1562359091.git.a.s.protopopov@gmail.com>
Date:   Fri,  5 Jul 2019 20:40:37 +0000
From:   Anton Protopopov <a.s.protopopov@...il.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Anton Protopopov <a.s.protopopov@...il.com>
Subject: [PATCH bpf-next 0/2]  libbpf: add an option to reuse maps when loading a program

The following two patches add an option for users to reuse existing maps when
loading a program using the bpf_prog_load_xattr function.  A user can specify a
directory containing pinned maps inside the bpf_prog_load_attr structure, and in
this case the bpf_prog_load_xattr function will replace (bpf_map__reuse_fd) all
maps defined in the object with file descriptors obtained from corresponding
entries from the specified directory.

Anton Protopopov (2):
  bpf, libbpf: add a new API bpf_object__reuse_maps()
  bpf, libbpf: add an option to reuse existing maps in bpf_prog_load_xattr

 tools/lib/bpf/libbpf.c   | 42 ++++++++++++++++++++++++++++++++++++++++
 tools/lib/bpf/libbpf.h   |  3 +++
 tools/lib/bpf/libbpf.map |  1 +
 3 files changed, 46 insertions(+)

--
2.19.1