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Date:   Tue, 28 Apr 2020 17:33:24 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Andrii Nakryiko <andriin@...com>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org, ast@...com,
        daniel@...earbox.net, andrii.nakryiko@...il.com, kernel-team@...com
Subject: Re: [PATCH v3 bpf-next 00/10] bpf_link observability APIs

On Tue, Apr 28, 2020 at 05:16:04PM -0700, Andrii Nakryiko wrote:
> This patch series adds various observability APIs to bpf_link:
>   - each bpf_link now gets ID, similar to bpf_map and bpf_prog, by which
>     user-space can iterate over all existing bpf_links and create limited FD
>     from ID;
>   - allows to get extra object information with bpf_link general and
>     type-specific information;
>   - implements `bpf link show` command which lists all active bpf_links in the
>     system;
>   - implements `bpf link pin` allowing to pin bpf_link by ID or from other
>     pinned path.
> 
> v2->v3:
>   - improve spin locking around bpf_link ID (Alexei);
>   - simplify bpf_link_info handling and fix compilation error on sh arch;
> v1->v2:
>   - simplified `bpftool link show` implementation (Quentin);
>   - fixed formatting of bpftool-link.rst (Quentin);
>   - fixed attach type printing logic (Quentin);
> rfc->v1:
>   - dropped read-only bpf_links (Alexei);
>   - fixed bug in bpf_link_cleanup() not removing ID;
>   - fixed bpftool link pinning search logic;
>   - added bash-completion and man page.

Applied, Thanks

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