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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Jakub Sitnicki , Shuah Khan , Jesper Dangaard Brouer , Sechang Lim , Ihor Solodrai , Cong Wang , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH bpf v2 4/7] bpf, sockmap: keep sk_msg copy state in sync Message-ID: References: <20260611123538.156005-1-jiayuan.chen@linux.dev> <20260611123538.156005-5-jiayuan.chen@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260611123538.156005-5-jiayuan.chen@linux.dev> On Thu, Jun 11, 2026 at 08:34:12PM +0800, Jiayuan Chen wrote: > @@ -2794,6 +2835,8 @@ BPF_CALL_4(bpf_msg_push_data, struct sk_msg *, msg, u32, start, > { > struct scatterlist sge, nsge, nnsge, rsge = {0}, *psge; > u32 new, i = 0, l = 0, space, copy = 0, offset = 0; > + bool sge_copy = false, nsge_copy = false, nnsge_copy = false; Reverse xmas tree style is preferred by netdev, see Documentation/process/maintainer-netdev.rst > BPF_CALL_4(bpf_msg_pop_data, struct sk_msg *, msg, u32, start, > @@ -3027,8 +3098,10 @@ BPF_CALL_4(bpf_msg_pop_data, struct sk_msg *, msg, u32, start, > */ > if (start != offset) { > struct scatterlist *nsge, *sge = sk_msg_elem(msg, i); > + u32 sge_idx = i; > int a = start - offset; > int b = sge->length - pop - a; > + bool sge_copy = sk_msg_elem_is_copy(msg, sge_idx); Ditto Thanks, Cong