From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
To: "Toke Høiland-Jørgensen" <toke@redhat.com>
Cc: netdev@vger.kernel.org, bpf@vger.kernel.org,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>, Andrii Nakryiko <andriin@fb.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Jesper Dangaard Brouer <brouer@redhat.com>,
John Fastabend <john.fastabend@gmail.com>,
Lorenz Bauer <lmb@cloudflare.com>, Andrey Ignatov <rdna@fb.com>
Subject: Re: [PATCH bpf-next v4 0/4] XDP: Support atomic replacement of XDP interface attachments
Date: Wed, 25 Mar 2020 10:46:47 -0700 [thread overview]
Message-ID: <20200325174647.4u2pfqvefmosbb2x@ast-mbp> (raw)
In-Reply-To: <158515700529.92963.17609642163080084530.stgit@toke.dk>
On Wed, Mar 25, 2020 at 06:23:25PM +0100, Toke Høiland-Jørgensen wrote:
> This series adds support for atomically replacing the XDP program loaded on an
> interface. This is achieved by means of a new netlink attribute that can specify
> the expected previous program to replace on the interface. If set, the kernel
> will compare this "expected id" attribute with the program currently loaded on
> the interface, and reject the operation if it does not match.
>
> With this primitive, userspace applications can avoid stepping on each other's
> toes when simultaneously updating the loaded XDP program.
>
> Changelog:
>
> v4:
> - Switch back to passing FD instead of ID (Andrii)
> - Rename flag to XDP_FLAGS_REPLACE (for consistency with other similar uses)
please stop resending the set without concluding the previous three! discussion threads.
It's already hard enough for people to follow.
prev parent reply other threads:[~2020-03-25 17:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-25 17:23 [PATCH bpf-next v4 0/4] XDP: Support atomic replacement of XDP interface attachments Toke Høiland-Jørgensen
2020-03-25 17:23 ` [PATCH bpf-next v4 1/4] xdp: Support specifying expected existing program when attaching XDP Toke Høiland-Jørgensen
2020-03-25 17:23 ` [PATCH bpf-next v4 2/4] tools: Add EXPECTED_FD-related definitions in if_link.h Toke Høiland-Jørgensen
2020-03-25 17:23 ` [PATCH bpf-next v4 3/4] libbpf: Add function to set link XDP fd while specifying old program Toke Høiland-Jørgensen
2020-03-25 17:23 ` [PATCH bpf-next v4 4/4] selftests/bpf: Add tests for attaching XDP programs Toke Høiland-Jørgensen
2020-03-25 17:46 ` Alexei Starovoitov [this message]
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