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Date:   Fri, 8 May 2020 11:18:56 -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 v3 01/21] bpf: implement an interface to register
 bpf_iter targets

On Wed, May 6, 2020 at 10:39 PM Yonghong Song <yhs@...com> wrote:
>
> The target can call bpf_iter_reg_target() to register itself.
> The needed information:
>   target:           target name
>   seq_ops:          the seq_file operations for the target
>   init_seq_private  target callback to initialize seq_priv during file open
>   fini_seq_private  target callback to clean up seq_priv during file release
>   seq_priv_size:    the private_data size needed by the seq_file
>                     operations
>
> The target name represents a target which provides a seq_ops
> for iterating objects.
>
> The target can provide two callback functions, init_seq_private
> and fini_seq_private, called during file open/release time.
> For example, /proc/net/{tcp6, ipv6_route, netlink, ...}, net
> name space needs to be setup properly during file open and
> released properly during file release.
>
> Function bpf_iter_unreg_target() is also implemented to unregister
> a particular target.
>
> Signed-off-by: Yonghong Song <yhs@...com>
> ---

Lost my initial ack? :) Here we go again:

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

>  include/linux/bpf.h   | 15 +++++++++++
>  kernel/bpf/Makefile   |  2 +-
>  kernel/bpf/bpf_iter.c | 59 +++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 75 insertions(+), 1 deletion(-)
>  create mode 100644 kernel/bpf/bpf_iter.c
>

[...]

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