From nobody Mon Nov 25 06:28:57 2024 Received: from mail-oa1-f68.google.com (mail-oa1-f68.google.com [209.85.160.68]) (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 CD4C01946DA; Wed, 30 Oct 2024 01:43:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.68 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730252589; cv=none; b=MmY1F7aNYb/I5BJE/oCebfPlD8wROmf/x6oO4PCCHnFGz8Yy79j2YfL2MOYvvVM4cErLFTr8CfsyDiFJ9HyIeQbHPekMDKgF847a2c8vG2rCKY2D4Uc4s8qhpxRki+htrt55oL/JCRLECWcx6QMdATlL5+2Vl8iEZ9RIOJEirYQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730252589; c=relaxed/simple; bh=jalKiGNYxieOdmuauWZ46l1HYvkQABXljddM93EYgn4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=scffEXbfNdnF22npUwsRL9Q9clR2JzYEf03unOw/U2FZwMc+nEWy5ocLw8oUB8S8ecIo1ccU70xvF/5SBUazNzhb804MqlzMV1825jJvACLiNxOuXp9VXvdeojbf2wmhZTuzgjqqMs5SIfBsJFKoCJuj25zhXqTkZVrK3qqjY1I= 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=lWstQQNC; arc=none smtp.client-ip=209.85.160.68 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="lWstQQNC" Received: by mail-oa1-f68.google.com with SMTP id 586e51a60fabf-27beb2496f4so2157014fac.1; Tue, 29 Oct 2024 18:43:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730252587; x=1730857387; 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=YCNnhtybNfvt04iDpo5zyre6+yqd+pwPbIIAs/JSjPU=; b=lWstQQNCFg5Yc+SH+fKKaQmr86FDtU7GJYjBW9xtR14tQabEiz6hR7fjNOnNcLlV+x KmHMckct7IG95PiLlbvRajNw+jnt1vCBFT8l6cNgPkfMjtRcrjQSTFqEZP/mXqPBvt1K 6BTy1H+uEqp4Ff1/l+lAVEe+aRpUSIhwtOLDKercCjJTC6jyuVrfsiZQSxduCOygVFol Rscwi0KaIj6yL7dKJx7KVZZYN8Muoh131Ng85Dy/LDQGUGw5fnFo5KjQOGKDswHihknC j4y/Wf8E1AAwc6Ass/8KiTTWDccvlig6Qy9rt2JKmY7dKKvBEx0+xcP79zm/gxnXqW0U EbvA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730252587; x=1730857387; 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=YCNnhtybNfvt04iDpo5zyre6+yqd+pwPbIIAs/JSjPU=; b=MU6X/fBl9qKPgnwwlQGYHU8c4P3pBDVKTjOkgZ7oY2QMep03Ind1AmVTYIdiId6k2r lSg1/UQLA8LPZOM0WkJoJVJyhcJewbKEbkfzmRaT13L1M/GDe65zURgxP5D1hCozqSnJ Rrs0/VyeUFCq0V1W2NKrzIpEvOVCNvPPpHH/qEyGsdaMRqVUpDDo9OgGhJsHd0FtAvrU m0oLvckPH0hMfFXD+VXV5yef9fEiqGEPDiguQNNVA582Tsb1Oofusmd2zKn7+rOwUmvI tI1BIJEIXn8HxNK2Lx91MyB53jYTUO+1DOZbhWwb1Wocx6cm2CDLGlf+Rto/WM0/Sh0Y f4YQ== X-Forwarded-Encrypted: i=1; AJvYcCUReyO7V65qZTUQDfuI+hr1kg91fXYdiLk9okg8AlJ8RHITs+q0TRp+q1a1gtqvI7jEv9pCYNRE8E682fVH8TEn@vger.kernel.org, AJvYcCVlQszUs2ohNBBT4ZHZQ2S6AN5WYCYUx9E/RgR3oBkc+r9XS9stbfev3F+GVDv7oLSmP+U=@vger.kernel.org, AJvYcCWkFd48DwlcL8n69UitqhKDAgJjlmCondIR5pFnovZBaeyycX4ik5w26F1WrWcnyscGiSGEzaPkuJ1uVZfB@vger.kernel.org, AJvYcCXxeURpKFjmQ0FJiKxMvVe6nCfNG3RBcmizgUA5i0ITJmK/uSI6GgFG9oZprPiF7CWpUmDujf5c@vger.kernel.org X-Gm-Message-State: AOJu0Yy8S/hT9+RGa4Vynx5b1TeidpWWmqzZOqUMycFofY4jqrGx54ok 0m60VGs9T+wtdrVxO301zTbWfffpI0NyH/b29fyxnFs12zkWuDKM X-Google-Smtp-Source: AGHT+IH8gM6H0784jdmZBrZyrQbLM9r7PuEpBa67ybDtGWd3l7ClBj6fVFjmhgiCBl1je3xf2Fcysg== X-Received: by 2002:a05:6870:4191:b0:277:fdce:6759 with SMTP id 586e51a60fabf-29051d49f6emr12807010fac.31.1730252586843; Tue, 29 Oct 2024 18:43:06 -0700 (PDT) Received: from localhost.localdomain ([43.129.25.208]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7edc866906dsm8138407a12.10.2024.10.29.18.43.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Oct 2024 18:43:06 -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, horms@kernel.org, dsahern@kernel.org, pablo@netfilter.org, kadlec@netfilter.org, roopa@nvidia.com, razor@blackwall.org, gnault@redhat.com, bigeasy@linutronix.de, hawk@kernel.org, idosch@nvidia.com, 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 RESEND net-next v4 2/9] net: ip: make ip_route_input_mc() return drop reason Date: Wed, 30 Oct 2024 09:41:38 +0800 Message-Id: <20241030014145.1409628-3-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241030014145.1409628-1-dongml2@chinatelecom.cn> References: <20241030014145.1409628-1-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 f64c0221c221..ccbaf6207299 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