Re: [PATCH bpf-next v1 1/3] bpf/xdp: Add bpf_load_hdr_opt support for xdp

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Subject: Re: [PATCH bpf-next v1 1/3] bpf/xdp: Add bpf_load_hdr_opt support for xdp
From: Jakub Kicinski <kuba@xxxxxxxxxx>
Date: Fri, 1 Oct 2021 16:01:33 -0700
Cc: Joanne Koong <joannekoong@xxxxxx>, bpf <bpf@xxxxxxxxxxxxxxx>, Martin KaFai Lau <kafai@xxxxxx>, Networking <netdev@xxxxxxxxxxxxxxx>, Kernel Team <Kernel-team@xxxxxx>
In-reply-to: <CAPhsuW4KVXE0UYVee2F7OR_A6C8pNOvPbXM1wDPFNwiUDeOMGg@mail.gmail.com>

On Fri, 1 Oct 2021 15:47:55 -0700 Song Liu wrote:
> > +       if (flags & 0xffffffffffff)  
> 
> Maybe use (1ULL << BPF_LOAD_HDR_OPT_TCP_OFFSET_SHIFT) - 1

Or GENMASK_ULL(47, 0) ?

References:
- [PATCH bpf-next v1 0/3] Add XDP support for bpf_load_hdr_opt
  - From: Joanne Koong
- [PATCH bpf-next v1 1/3] bpf/xdp: Add bpf_load_hdr_opt support for xdp
  - From: Joanne Koong
- Re: [PATCH bpf-next v1 1/3] bpf/xdp: Add bpf_load_hdr_opt support for xdp
  - From: Song Liu

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