From: Daniel Borkmann <daniel@iogearbox•net>
To: Alexei Starovoitov <ast@fb•com>,
"David S . Miller" <davem@davemloft•net>
Cc: David Ahern <dsa@cumulusnetworks•com>, Tejun Heo <tj@kernel•org>,
Andy Lutomirski <luto@amacapital•net>,
"Eric W . Biederman" <ebiederm@xmission•com>,
netdev@vger•kernel.org
Subject: Re: [PATCH v4 net] bpf: add bpf_sk_netns_id() helper
Date: Tue, 07 Feb 2017 11:41:40 +0100 [thread overview]
Message-ID: <5899A464.8080508@iogearbox.net> (raw)
In-Reply-To: <1486432968-3255218-1-git-send-email-ast@fb.com>
On 02/07/2017 03:02 AM, Alexei Starovoitov wrote:
> in cases where bpf programs are looking at sockets and packets
> that belong to different netns, it could be useful to get an id
> that uniquely identify a netns within the whole system.
>
> Therefore introduce 'u64 bpf_sk_netns_id(sk);' helper. It returns
> unique value that identifies netns of given socket or dev_net(skb->dev)
> The upper 32-bits of the return value contain device id where namespace
> filesystem resides and lower 32-bits contain inode number within that filesystem.
[...]
> Signed-off-by: Alexei Starovoitov <ast@kernel•org>
> Reviewed-by: David Ahern <dsa@cumulusnetworks•com>
> Tested-by: David Ahern <dsa@cumulusnetworks•com>
For the BPF bits:
Acked-by: Daniel Borkmann <daniel@iogearbox•net>
next prev parent reply other threads:[~2017-02-07 10:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-07 2:02 [PATCH v4 net] bpf: add bpf_sk_netns_id() helper Alexei Starovoitov
2017-02-07 10:41 ` Daniel Borkmann [this message]
2017-02-08 18:16 ` David Miller
2017-02-14 7:21 ` Eric W. Biederman
2017-02-16 2:16 ` David Ahern
2017-02-16 3:08 ` Eric W. Biederman
2017-02-16 3:18 ` David Ahern
2017-02-16 3:25 ` Andy Lutomirski
2017-02-16 3:35 ` David Ahern
2017-02-16 3:45 ` Eric W. Biederman
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