Re: [PATCH v4 bpf-next 1/3] bpf: Add get_netns_id helper function for sock_ops
From: Song Liu <song@kernel.org>
Date: 2020-02-25 05:54:33
Also in:
bpf
On Mon, Feb 24, 2020 at 8:46 PM Lingpeng Chen [off-list ref] wrote:
Currently 5-tuple(sip+dip+sport+dport+proto) can't identify a uniq connection because there may be multi net namespace. For example, there may be a chance that netns a and netns b all listen on 127.0.0.1:8080 and the client with same port 40782 connect to them. Without netns number, sock ops program can't distinguish them. Using bpf_get_netns_id helper to get current connection netns id to distinguish connections. Signed-off-by: Lingpeng Chen <redacted>
Acked-by: Song Liu <redacted>