From: Jakub Kicinski <kuba@kernel.org>
To: Stanislav Fomichev <stfomichev@gmail.com>
Cc: Lorenzo Bianconi <lorenzo@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
John Fastabend <john.fastabend@gmail.com>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <martin.lau@linux.dev>,
Eduard Zingerman <eddyz87@gmail.com>, Song Liu <song@kernel.org>,
Yonghong Song <yonghong.song@linux.dev>,
KP Singh <kpsingh@kernel.org>,
Stanislav Fomichev <sdf@fomichev.me>, Hao Luo <haoluo@google.com>,
Jiri Olsa <jolsa@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Jesper Dangaard Brouer <hawk@kernel.org>,
bpf@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH bpf-next] bpf: Allow XDP dev bounded program to perform XDP_REDIRECT into maps
Date: Tue, 22 Apr 2025 17:03:30 -0700 [thread overview]
Message-ID: <20250422170330.71e47a70@kernel.org> (raw)
In-Reply-To: <aAgdECkTiP-po7HP@mini-arch>
On Tue, 22 Apr 2025 15:49:52 -0700 Stanislav Fomichev wrote:
> > + if (map->map_type == BPF_MAP_TYPE_DEVMAP &&
> > + prog->expected_attach_type != BPF_XDP_DEVMAP)
> > + return true;
> > +
> > + if (map->map_type == BPF_MAP_TYPE_CPUMAP &&
> > + prog->expected_attach_type != BPF_XDP_CPUMAP)
> > + return true;
>
> Not sure I understand, what does it mean exactly? That it's ok to add
> a dev-bound program to the dev/cpumap if the program itself is gonna
> be attached only to the real device? Can you expand more on the specific
> use-case?
And an upstream offload which supports it..
next prev parent reply other threads:[~2025-04-23 0:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-22 21:14 [PATCH bpf-next] bpf: Allow XDP dev bounded program to perform XDP_REDIRECT into maps Lorenzo Bianconi
2025-04-22 22:49 ` Stanislav Fomichev
2025-04-23 0:03 ` Jakub Kicinski [this message]
2025-04-23 10:11 ` Lorenzo Bianconi
2025-04-23 14:33 ` Stanislav Fomichev
2025-04-23 14:54 ` Lorenzo Bianconi
2025-04-23 15:09 ` Stanislav Fomichev
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