netdev - Re: [PATCH v2 bpf-next 2/3] bpf: implement CAP

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Message-ID: <99acd443-69d7-f53a-1af0-263e0b73abef@fb.com>
Date:   Wed, 4 Sep 2019 15:21:11 +0000
From:   Alexei Starovoitov <ast@...com>
To:     Daniel Borkmann <daniel@...earbox.net>,
        "nicolas.dichtel@...nd.com" <nicolas.dichtel@...nd.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>
CC:     Alexei Starovoitov <ast@...nel.org>,
        "luto@...capital.net" <luto@...capital.net>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        Kernel Team <Kernel-team@...com>,
        "linux-api@...r.kernel.org" <linux-api@...r.kernel.org>
Subject: Re: [PATCH v2 bpf-next 2/3] bpf: implement CAP_BPF

On 9/4/19 8:16 AM, Daniel Borkmann wrote:
> opening/creating BPF maps" error="Unable to create map 
> /run/cilium/bpffs/tc/globals/cilium_lxc: operation not permitted" 
> subsys=daemon
> 2019-09-04T14:11:47.28178666Z level=fatal msg="Error while creating 
> daemon" error="Unable to create map 
> /run/cilium/bpffs/tc/globals/cilium_lxc: operation not permitted" 
> subsys=daemon

Ok. We have to include caps in both cap_sys_admin and cap_bpf then.

> And /same/ deployment with reverted patches, hence no CAP_BPF gets it up 
> and running again:
> 
> # kubectl get pods --all-namespaces -o wide

Can you share what this magic commands do underneath?

What user do they pick to start under? and what caps are granted?