From: Martin KaFai Lau <kafai@fb.com>
To: Lorenz Bauer <lmb@cloudflare.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
John Fastabend <john.fastabend@gmail.com>,
Jakub Sitnicki <jakub@cloudflare.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, <kernel-team@cloudflare.com>,
<netdev@vger.kernel.org>, <bpf@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH bpf-next v2 1/4] bpf: sockmap: enable map_update_elem from bpf_iter
Date: Mon, 28 Sep 2020 22:35:25 -0700 [thread overview]
Message-ID: <20200929053525.aje3oavmcrbzmo34@kafai-mbp> (raw)
In-Reply-To: <20200928090805.23343-2-lmb@cloudflare.com>
On Mon, Sep 28, 2020 at 10:08:02AM +0100, Lorenz Bauer wrote:
> Allow passing a pointer to a BTF struct sock_common* when updating
> a sockmap or sockhash. Since BTF pointers can fault and therefore be
> NULL at runtime we need to add an additional !sk check to
> sock_map_update_elem. Since we may be passed a request or timewait
> socket we also need to check sk_fullsock. Doing this allows calling
> map_update_elem on sockmap from bpf_iter context, which uses
> BTF pointers.
Acked-by: Martin KaFai Lau <kafai@fb.com>
next prev parent reply other threads:[~2020-09-29 5:35 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-28 9:08 [PATCH bpf-next v2 0/4] Sockmap copying Lorenz Bauer
2020-09-28 9:08 ` [PATCH bpf-next v2 1/4] bpf: sockmap: enable map_update_elem from bpf_iter Lorenz Bauer
2020-09-29 5:35 ` Martin KaFai Lau [this message]
2020-09-28 9:08 ` [PATCH bpf-next v2 2/4] selftests: bpf: Add helper to compare socket cookies Lorenz Bauer
2020-09-29 5:59 ` Martin KaFai Lau
2020-09-29 15:48 ` Alexei Starovoitov
2020-09-30 9:28 ` Lorenz Bauer
2020-10-01 7:23 ` Alexei Starovoitov
2020-10-01 17:09 ` Andrii Nakryiko
2020-10-01 17:11 ` Alexei Starovoitov
2020-10-02 10:08 ` Lorenz Bauer
2020-09-28 9:08 ` [PATCH bpf-next v2 3/4] selftests: bpf: remove shared header from sockmap iter test Lorenz Bauer
2020-09-28 9:08 ` [PATCH bpf-next v2 4/4] selftest: bpf: Test copying a sockmap and sockhash Lorenz Bauer
2020-09-29 6:06 ` Martin KaFai Lau
2020-09-29 9:21 ` Lorenz Bauer
2020-09-29 17:23 ` Martin KaFai Lau
2020-09-30 9:37 ` Lorenz Bauer
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