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Date: Wed, 30 Sep 2020 10:37:53 +0100 From: Lorenz Bauer <lmb@...udflare.com> To: Martin KaFai Lau <kafai@...com> Cc: Shuah Khan <shuah@...nel.org>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, kernel-team <kernel-team@...udflare.com>, "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>, Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH bpf-next v2 4/4] selftest: bpf: Test copying a sockmap and sockhash On Tue, 29 Sep 2020 at 18:23, Martin KaFai Lau <kafai@...com> wrote: ... > > Yeah, I think so. We'd need to do something similar to your > > sock_common work for PTR_TO_RDONLY_BUF_OR_NULL. The fact that the > > pointer is read only makes it a bit more difficult I think. After > I thought the key arg should be used as read-only in the map's helper. > or there is map type's helper that modifies the key? I don't know, that's what I meant by more difficult. If map keys are always read-only like you say this would be straight forward to do (famous last words). -- Lorenz Bauer | Systems Engineer 6th Floor, County Hall/The Riverside Building, SE1 7PB, UK www.cloudflare.com
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