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From: Yonghong Song <yhs@fb.com>
To: <bpf@vger.kernel.org>, <netdev@vger.kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>, <kernel-team@fb.com>
Subject: [PATCH bpf-next 0/3] bpf: implement link_query for bpf iterators
Date: Wed, 19 Aug 2020 17:13:23 -0700	[thread overview]
Message-ID: <20200820001323.3740798-1-yhs@fb.com> (raw)

"link" has been an important concept for bpf ecosystem to connect
bpf program with other properties. Currently, the information related
information can be queried from userspace through bpf command
BPF_LINK_GET_NEXT_ID, BPF_LINK_GET_FD_BY_ID and BPF_OBJ_GET_INFO_BY_FD.
The information is also available by "cating" /proc/<pid>/fdinfo/<link_fd>.
Raw_tracepoint, tracing, cgroup, netns and xdp links are already
supported in the kernel and bpftool.

This patch added support for bpf iterator. Patch #1 added generic support
for link querying interface. Patch #2 implemented callback functions
for map element bpf iterators. Patch #3 added bpftool support.

Yonghong Song (3):
  bpf: implement link_query for bpf iterators
  bpf: implement link_query callbacks in map element iterators
  bpftool: implement link_query for bpf iterators

 include/linux/bpf.h            | 10 ++++++
 include/uapi/linux/bpf.h       |  7 ++++
 kernel/bpf/bpf_iter.c          | 58 ++++++++++++++++++++++++++++++++++
 kernel/bpf/map_iter.c          | 15 +++++++++
 net/core/bpf_sk_storage.c      |  2 ++
 tools/bpf/bpftool/link.c       | 44 ++++++++++++++++++++++++--
 tools/include/uapi/linux/bpf.h |  7 ++++
 7 files changed, 140 insertions(+), 3 deletions(-)

-- 
2.24.1


             reply	other threads:[~2020-08-20  0:13 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-20  0:13 Yonghong Song [this message]
2020-08-20  0:13 ` [PATCH bpf-next 1/3] " Yonghong Song
2020-08-20 15:07   ` Jakub Kicinski
2020-08-20 16:15     ` Yonghong Song
2020-08-20 22:31       ` Alexei Starovoitov
2020-08-20  0:13 ` [PATCH bpf-next 2/3] bpf: implement link_query callbacks in map element iterators Yonghong Song
2020-08-20  0:13 ` [PATCH bpf-next 3/3] bpftool: implement link_query for bpf iterators Yonghong Song

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