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

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Date:   Wed, 13 May 2020 11:19:10 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Yonghong Song <yhs@...com>
Cc:     Andrii Nakryiko <andriin@...com>, bpf <bpf@...r.kernel.org>,
        Martin KaFai Lau <kafai@...com>,
        Networking <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Kernel Team <kernel-team@...com>
Subject: Re: [PATCH bpf-next v2 0/7] bpf: misc fixes for bpf_iter

On Wed, May 13, 2020 at 11:03 AM Yonghong Song <yhs@...com> wrote:
>
> 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
>

For the series:

Acked-by: Andrii Nakryiko <andriin@...com>