netdev - [PATCH bpf-next v2 0/7] bpf: misc fixes for bpf

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Date:   Wed, 13 May 2020 11:02:15 -0700
From:   Yonghong Song <yhs@...com>
To:     Andrii Nakryiko <andriin@...com>, <bpf@...r.kernel.org>,
        Martin KaFai Lau <kafai@...com>, <netdev@...r.kernel.org>
CC:     Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>, <kernel-team@...com>
Subject: [PATCH bpf-next v2 0/7] bpf: misc fixes for bpf_iter

Commit ae24345da54e ("bpf: Implement an interface to register
bpf_iter targets") and its subsequent commits in the same patch set
introduced bpf iterator, a way to run bpf program when iterating
kernel data structures.

This patch set addressed some followup issues. One big change
is to allow target to pass ctx arg register types to verifier
for verification purpose. Please see individual patch for details.

Changelogs:
  v1 -> v2:
    . add "const" qualifier to struct bpf_iter_reg for
      bpf_iter_[un]reg_target, and this results in
      additional "const" qualifiers in some other places
    . drop the patch which will issue WARN_ONCE if
      seq_ops->show() returns a positive value.
      If this does happen, code review should spot
      this or author does know what he is doing.
      In the future, we do want to implement a
      mechanism to find out all registered targets
      so we will be aware of new additions.

Yonghong Song (7):
  tools/bpf: selftests : explain bpf_iter test failures with llvm 10.0.0
  bpf: change btf_iter func proto prefix to "bpf_iter_"
  bpf: add comments to interpret bpf_prog return values
  bpf: net: refactor bpf_iter target registration
  bpf: change func bpf_iter_unreg_target() signature
  bpf: enable bpf_iter targets registering ctx argument types
  samples/bpf: remove compiler warnings

 include/linux/bpf.h                    | 22 ++++++++----
 include/net/ip6_fib.h                  |  7 ++++
 kernel/bpf/bpf_iter.c                  | 49 +++++++++++++++-----------
 kernel/bpf/btf.c                       | 15 +++++---
 kernel/bpf/map_iter.c                  | 23 +++++++-----
 kernel/bpf/task_iter.c                 | 42 ++++++++++++++--------
 kernel/bpf/verifier.c                  |  1 -
 net/ipv6/ip6_fib.c                     |  5 ---
 net/ipv6/route.c                       | 25 +++++++------
 net/netlink/af_netlink.c               | 23 +++++++-----
 samples/bpf/offwaketime_kern.c         |  4 +--
 samples/bpf/sockex2_kern.c             |  4 +--
 samples/bpf/sockex3_kern.c             |  4 +--
 tools/lib/bpf/libbpf.c                 |  2 +-
 tools/testing/selftests/bpf/README.rst | 43 ++++++++++++++++++++++
 15 files changed, 183 insertions(+), 86 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/README.rst

-- 
2.24.1