netdev - Re: [PATCH net-next 5/7] ebpf: export BPF_PSEUDO_MAP

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Message-ID: <CAMEtUuzJGUzi5VysKDDcwUTcd0ro=pxB1iEn0aRQ5n+zfp5aXw@mail.gmail.com>
Date:	Tue, 10 Feb 2015 17:39:35 -0800
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Daniel Borkmann <daniel@...earbox.net>
Cc:	Jiří Pírko <jiri@...nulli.us>,
	Network Development <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 5/7] ebpf: export BPF_PSEUDO_MAP_FD to uapi

On Tue, Feb 10, 2015 at 4:15 PM, Daniel Borkmann <daniel@...earbox.net> wrote:
> We need to export BPF_PSEUDO_MAP_FD to user space, as it's used in
> the ELF BPF loader where instructions are being loaded that need
> map fixups (relocations). An initial stage loads all maps into the
> kernel, and later on replaces related instructions in the eBPF blob
> with BPF_PSEUDO_MAP_FD as source register and the actual fd as
> immediate value. The kernel verifier recognizes this keyword and
> replaces the map fd with a real pointer internally.
>
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>

oops. thanks. didn't realize that I forgot to add it to uapi.
Acked-by: Alexei Starovoitov <ast@...mgrid.com>
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