netdev - Re: [PATCH net-next v6 1/5] bpf: Add file mode configuration into bpf maps

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Message-ID: <59E539C6.6050009@iogearbox.net>
Date:   Tue, 17 Oct 2017 00:59:18 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Chenbo Feng <chenbofeng.kernel@...il.com>, netdev@...r.kernel.org,
        SELinux <Selinux@...ho.nsa.gov>,
        linux-security-module@...r.kernel.org
CC:     Jeffrey Vander Stoep <jeffv@...gle.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        lorenzo@...gle.com, Stephen Smalley <sds@...ho.nsa.gov>,
        James Morris <james.l.morris@...cle.com>,
        Paul Moore <paul@...l-moore.com>,
        Chenbo Feng <fengc@...gle.com>
Subject: Re: [PATCH net-next v6 1/5] bpf: Add file mode configuration into
 bpf maps

On 10/16/2017 09:11 PM, Chenbo Feng wrote:
> From: Chenbo Feng <fengc@...gle.com>
>
> Introduce the map read/write flags to the eBPF syscalls that returns the
> map fd. The flags is used to set up the file mode when construct a new
> file descriptor for bpf maps. To not break the backward capability, the
> f_flags is set to O_RDWR if the flag passed by syscall is 0. Otherwise
> it should be O_RDONLY or O_WRONLY. When the userspace want to modify or
> read the map content, it will check the file mode to see if it is
> allowed to make the change.
>
> Signed-off-by: Chenbo Feng <fengc@...gle.com>
> Acked-by: Alexei Starovoitov <ast@...nel.org>

Acked-by: Daniel Borkmann <daniel@...earbox.net>