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[79.184.124.63]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b93eea5869bsm241536066b.13.2026.03.05.03.44.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Mar 2026 03:44:32 -0800 (PST) From: Jakub Sitnicki To: Kuniyuki Iwashima Cc: John Fastabend , Willem de Bruijn , Kuniyuki Iwashima , bpf@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH v4 bpf/net 4/6] sockmap: Inline sk_psock_create_ingress_msg(). In-Reply-To: <20260221233234.3814768-5-kuniyu@google.com> (Kuniyuki Iwashima's message of "Sat, 21 Feb 2026 23:30:51 +0000") References: <20260221233234.3814768-1-kuniyu@google.com> <20260221233234.3814768-5-kuniyu@google.com> Date: Thu, 05 Mar 2026 12:44:31 +0100 Message-ID: <871phyo600.fsf@cloudflare.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Sat, Feb 21, 2026 at 11:30 PM GMT, Kuniyuki Iwashima wrote: > SOCKMAP memory accounting for UDP is broken for two reasons: > > 1. sk->sk_forward_alloc must be changed under > spin_lock_bh(&sk->sk_receive_queue.lock) > > 2. sk_psock_skb_ingress_self() should not be used for UDP > since UDP may reclaim sk->sk_forward_alloc partially > before passing skb to sockmap, resulting in a negative > sk->sk_forward_alloc > > This is a prep commit to consolidate sk_psock_skb_ingress_self() > and centralise the fix to sk_psock_skb_ingress(). > > Let's inline sk_psock_create_ingress_msg(). > > Note that now alloc_sk_msg() is called first. > > Signed-off-by: Kuniyuki Iwashima > --- > v4: Don't pass gfp_flags and instead change it based on > take_ref in the next patch > --- Reviewed-by: Jakub Sitnicki