linux-kernel - Re: [PATCH bpf-next v4 5/5] selftests: bpf: test writable buffers in raw tps

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Date:   Wed, 24 Apr 2019 22:56:56 +0000
From:   Yonghong Song <yhs@...com>
To:     Matt Mullins <mmullins@...com>, Andrew Hall <hall@...com>,
        "ast@...nel.org" <ast@...nel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Steven Rostedt" <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        "Daniel Borkmann" <daniel@...earbox.net>,
        Martin Lau <kafai@...com>, Song Liu <songliubraving@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Shuah Khan <shuah@...nel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH bpf-next v4 5/5] selftests: bpf: test writable buffers in
 raw tps



On 4/24/19 12:07 PM, Matt Mullins wrote:
> This tests that:
>    * a BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE cannot be attached if it
>      uses either:
>      * a variable offset to the tracepoint buffer, or
>      * an offset beyond the size of the tracepoint buffer
>    * a tracer can modify the buffer provided when attached to a writable
>      tracepoint in bpf_prog_test_run
> 
> Signed-off-by: Matt Mullins <mmullins@...com>

Acked-by: Yonghong Song <yhs@...com>

BTW, your patches have some conflicts with latest bpf-next, you may want
to rebase and resubmit.