From nobody Wed Nov 27 00:47:16 2024 Received: from mail-pl1-f194.google.com (mail-pl1-f194.google.com [209.85.214.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1724A1D5158; Tue, 15 Oct 2024 14:08:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.194 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729001316; cv=none; b=LdJcXlJYw7zDzg00EdWhhwkW2DJn/35Sbg5RaR7Fr3uLbcgIv4LsZKklOZn9kem6J5weXJxLBKKPupQZYUyBG+HYDfPFX9kPWQOH6cRsO2KyAmbV2x5mBBoUL9qP+5yf9geNXDgsnz6pAYkQxmywKx+21ytCwzBaUh3Zn1ogmyE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729001316; c=relaxed/simple; bh=zjlkYbbC8QBM7Wf3cdYohzkjfajX7qpT0FaW94GtYUw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AyKOUn9s4v4HAmw6AFdPh5D/6I5QVZ7HNbYRdVWlkW/kYfygEc32X8aicIfH5Xkk1iVAkMU3TLjEZ5ACs4CaqXUHTkHiiujr88gKYhcyjR0yXnbYXWiQOD04aGpFGabhkLGWEtwAJ/V+ccec/IwkzVZj5P6rpuKjjhPmYVxs/gE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=ej/3UfSo; arc=none smtp.client-ip=209.85.214.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ej/3UfSo" Received: by mail-pl1-f194.google.com with SMTP id d9443c01a7336-20c7edf2872so40884835ad.1; Tue, 15 Oct 2024 07:08:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1729001314; x=1729606114; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=UXNVpwdypQN7MhzdxvEJ3Is8WZEvjSGwXelKg8lkKU8=; b=ej/3UfSoL6lt0zCO15ZS3WoX20tV2zCqyGkgnq2SkhUWzhCqXgO7GqLrdzPI2b0t7e g/7GIdha8Z/OYaGVY+Irz3Woc8VskTG2TE6tWuHBV19C8OH3TwXeeyBbMzneboqzHqV/ AYk2Xk+p1px0+Ddl8Mhuv3dDfF4cpFHxuiokRybnPnMiK2T+9Wl0TPWcJ62bTEBglcoo Yr4cAOFTdRL5Y+jM4Uhs0jzxGG87r5S67TIuLfA6HuB6ZOdxu6Wk/WTu0+o7dl2nAb+v TEmA/bsFtg8UAJFJTq3pMglBk8IHZOywo399KEZSTef1XqYTQwTukn5fV7lmyuRV4rmh FpAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729001314; x=1729606114; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UXNVpwdypQN7MhzdxvEJ3Is8WZEvjSGwXelKg8lkKU8=; b=Khwt7K8975PIHYmQQz9iL6pKnEdYaQ78AuNeW+8rhPSAcp3GFSVRX8GYT8Me161hbw 26pt+f8hJ6eBoi8wdWAW11u872W6BpGa0j343Uo4Ln6RAHj54gBwDereJpNaaqcGTJKc 0X8Cohd2YdqbDJgF5Eq6Sq6RwGJ8BvV8aJNFulXHo1uScFVHYFH5eeIE1IwVbGbrN64x 29bcXZBVdxq5C0pFcskjjY4aCnajmFA+yAici7+UO6+9IOUNL60RVlsZ+uSDUSFxGgZO 2XbXLXoU6KjFDJzCoxB+095gVJDW4eSrq+aBL9+tr2iW+twfC11L/D6LGYym8rDok5o+ cpyQ== X-Forwarded-Encrypted: i=1; AJvYcCV8NIoYRi58M3hIlJrm0cuq0/iWdBIGSG6yw9xjdHCTejqEUHITmVdl6dooHzQ6YHIibgUCd2k6AbT/LAgq3xs1@vger.kernel.org, AJvYcCVdV8VTtCzuLrX1k+C4l4Kg5CI8o6AvBNcBlao3n9CcDcYyHzzNT/UNqS6F+tTO8P2m3e92ZdaV1Zv5cw+Z@vger.kernel.org, AJvYcCWCvbmOHKHaAsPMnzlqfaS+8UT8koHCm3dzEk0NGl6eD9k2yKEpVrCFAS9TaDjWTuhNQdQ=@vger.kernel.org, AJvYcCWzIz2eLkxAV9vREh31JbtmCYYTEHCvt2nv9MtXlJGLCc7rU8XQ8s49p1Wj5fzDVO2hRjeecnE1@vger.kernel.org X-Gm-Message-State: AOJu0YyFFwEB/geIbYKEY3Ki60YPJUNg3dpSHTMQ4bKDBi/9ezdEzFG4 n9ewHyTPIpoBhJE+70MS2SeiEg871kw1RloRRYEqPJZZm4SXK+6FXvMINiIW X-Google-Smtp-Source: AGHT+IGRXJjST0HTxQYk+VFHEHpjAD+R//v1UjrCQMEfF2mjki+N/bHGaWK/rOjw6+eX9IGlKmdSOQ== X-Received: by 2002:a17:902:f647:b0:205:8b84:d5e8 with SMTP id d9443c01a7336-20ca03a6a5cmr217260785ad.18.1729001314209; Tue, 15 Oct 2024 07:08:34 -0700 (PDT) Received: from localhost.localdomain ([43.129.25.208]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20d17f9d419sm12437625ad.93.2024.10.15.07.08.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Oct 2024 07:08:33 -0700 (PDT) From: Menglong Dong X-Google-Original-From: Menglong Dong To: pabeni@redhat.com Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, dsahern@kernel.org, pablo@netfilter.org, kadlec@netfilter.org, roopa@nvidia.com, razor@blackwall.org, gnault@redhat.com, bigeasy@linutronix.de, idosch@nvidia.com, ast@kernel.org, dongml2@chinatelecom.cn, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, bridge@lists.linux.dev, bpf@vger.kernel.org Subject: [PATCH net-next v3 03/10] net: ip: make ip_route_input_mc() return drop reason Date: Tue, 15 Oct 2024 22:07:53 +0800 Message-Id: <20241015140800.159466-4-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241015140800.159466-1-dongml2@chinatelecom.cn> References: <20241015140800.159466-1-dongml2@chinatelecom.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Make ip_route_input_mc() return drop reason, and adjust the call of it in ip_route_input_rcu(). Signed-off-by: Menglong Dong --- net/ipv4/route.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index df5401efbf56..7f989e8eff30 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1696,8 +1696,9 @@ int ip_mc_validate_source(struct sk_buff *skb, __be32= daddr, __be32 saddr, } =20 /* called in rcu_read_lock() section */ -static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 sad= dr, - dscp_t dscp, struct net_device *dev, int our) +static enum skb_drop_reason +ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr, + dscp_t dscp, struct net_device *dev, int our) { struct in_device *in_dev =3D __in_dev_get_rcu(dev); unsigned int flags =3D RTCF_MULTICAST; @@ -1708,7 +1709,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __b= e32 daddr, __be32 saddr, err =3D ip_mc_validate_source(skb, daddr, saddr, dscp, dev, in_dev, &itag); if (err) - return err; + return SKB_DROP_REASON_NOT_SPECIFIED; =20 if (our) flags |=3D RTCF_LOCAL; @@ -1719,7 +1720,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __b= e32 daddr, __be32 saddr, rth =3D rt_dst_alloc(dev_net(dev)->loopback_dev, flags, RTN_MULTICAST, false); if (!rth) - return -ENOBUFS; + return SKB_DROP_REASON_NOMEM; =20 #ifdef CONFIG_IP_ROUTE_CLASSID rth->dst.tclassid =3D itag; @@ -1735,7 +1736,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __b= e32 daddr, __be32 saddr, =20 skb_dst_drop(skb); skb_dst_set(skb, &rth->dst); - return 0; + return SKB_NOT_DROPPED_YET; } =20 =20 @@ -2433,12 +2434,12 @@ static int ip_route_input_rcu(struct sk_buff *skb, = __be32 daddr, __be32 saddr, * route cache entry is created eventually. */ if (ipv4_is_multicast(daddr)) { + enum skb_drop_reason reason =3D SKB_DROP_REASON_NOT_SPECIFIED; struct in_device *in_dev =3D __in_dev_get_rcu(dev); int our =3D 0; - int err =3D -EINVAL; =20 if (!in_dev) - return err; + return -EINVAL; our =3D ip_check_mc_rcu(in_dev, daddr, saddr, ip_hdr(skb)->protocol); =20 @@ -2459,10 +2460,10 @@ static int ip_route_input_rcu(struct sk_buff *skb, = __be32 daddr, __be32 saddr, IN_DEV_MFORWARD(in_dev)) #endif ) { - err =3D ip_route_input_mc(skb, daddr, saddr, dscp, dev, - our); + reason =3D ip_route_input_mc(skb, daddr, saddr, dscp, + dev, our); } - return err; + return reason ? -EINVAL : 0; } =20 return ip_route_input_slow(skb, daddr, saddr, dscp, dev, res); --=20 2.39.5