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AJvYcCV9pSF6km4+jAgb0nn2J3yJQgYd01VgAv6eUJkW/SN236XWic2jQ2L7NMCMjcK/aRDlAGqatFzz@vger.kernel.org, AJvYcCWAVdAU8GNAjFUHbM601DaEut299+Egnyd510/8EnDMKCz5UYStreQxOjkKghnDvgfCoSCBjKJXK336cPU=@vger.kernel.org X-Gm-Message-State: AOJu0YwRy0lk69V3t9hytyxMciTF3v9b2Qpruh0D8K6Tq/Jf/ho/EEuA RtRcjDn6Qj7MdpubpRqoYTB28JdKLdWpgoC8xlp4GJEbLEHKZ3tW X-Google-Smtp-Source: AGHT+IFfT1yusRFFBUbqO6fopPEa2Seo2/HoTTKsMfP0htTnanTBbl66j9j42Q9qjUh5OP4V8Wz3cg== X-Received: by 2002:a17:90a:4a8c:b0:2e2:8f1e:f5ea with SMTP id 98e67ed59e1d1-2e28f1efc06mr1736973a91.1.1728397458510; Tue, 08 Oct 2024 07:24:18 -0700 (PDT) Received: from localhost.localdomain ([43.129.25.208]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e20b0f68a8sm7675987a91.36.2024.10.08.07.24.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Oct 2024 07:24:18 -0700 (PDT) From: Menglong Dong X-Google-Original-From: Menglong Dong To: idosch@nvidia.com, kuba@kernel.org, aleksander.lobakin@intel.com, horms@kernel.org Cc: davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, dsahern@kernel.org, dongml2@chinatelecom.cn, amcohen@nvidia.com, gnault@redhat.com, bpoirier@nvidia.com, b.galvani@gmail.com, razor@blackwall.org, petrm@nvidia.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH net-next v6 03/12] net: tunnel: make skb_vlan_inet_prepare() return drop reasons Date: Tue, 8 Oct 2024 22:22:51 +0800 Message-Id: <20241008142300.236781-4-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241008142300.236781-1-dongml2@chinatelecom.cn> References: <20241008142300.236781-1-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 skb_vlan_inet_prepare return the skb drop reasons, which is just what pskb_may_pull_reason() returns. Meanwhile, adjust all the call of it. Signed-off-by: Menglong Dong --- v5: - make skb_vlan_inet_prepare() return drop reasons, instead of introduce a wrapper for it. v3: - fix some format problems, as Alexander advised --- drivers/net/bareudp.c | 4 ++-- drivers/net/geneve.c | 4 ++-- drivers/net/vxlan/vxlan_core.c | 2 +- include/net/ip_tunnels.h | 13 ++++++++----- 4 files changed, 13 insertions(+), 10 deletions(-) diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c index e057526448d7..fa2dd76ba3d9 100644 --- a/drivers/net/bareudp.c +++ b/drivers/net/bareudp.c @@ -317,7 +317,7 @@ static int bareudp_xmit_skb(struct sk_buff *skb, struct= net_device *dev, __be32 saddr; int err; =20 - if (!skb_vlan_inet_prepare(skb, skb->protocol !=3D htons(ETH_P_TEB))) + if (skb_vlan_inet_prepare(skb, skb->protocol !=3D htons(ETH_P_TEB))) return -EINVAL; =20 if (!sock) @@ -387,7 +387,7 @@ static int bareudp6_xmit_skb(struct sk_buff *skb, struc= t net_device *dev, __be16 sport; int err; =20 - if (!skb_vlan_inet_prepare(skb, skb->protocol !=3D htons(ETH_P_TEB))) + if (skb_vlan_inet_prepare(skb, skb->protocol !=3D htons(ETH_P_TEB))) return -EINVAL; =20 if (!sock) diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index 7f611c74eb62..2f29b1386b1c 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -827,7 +827,7 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct = net_device *dev, __be16 sport; int err; =20 - if (!skb_vlan_inet_prepare(skb, inner_proto_inherit)) + if (skb_vlan_inet_prepare(skb, inner_proto_inherit)) return -EINVAL; =20 if (!gs4) @@ -937,7 +937,7 @@ static int geneve6_xmit_skb(struct sk_buff *skb, struct= net_device *dev, __be16 sport; int err; =20 - if (!skb_vlan_inet_prepare(skb, inner_proto_inherit)) + if (skb_vlan_inet_prepare(skb, inner_proto_inherit)) return -EINVAL; =20 if (!gs6) diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index 53dcb9fffc04..0359c750d81e 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -2356,7 +2356,7 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_d= evice *dev, __be32 vni =3D 0; =20 no_eth_encap =3D flags & VXLAN_F_GPE && skb->protocol !=3D htons(ETH_P_TE= B); - if (!skb_vlan_inet_prepare(skb, no_eth_encap)) + if (skb_vlan_inet_prepare(skb, no_eth_encap)) goto drop; =20 old_iph =3D ip_hdr(skb); diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h index 7fc2f7bf837a..4e4f9e24c9c1 100644 --- a/include/net/ip_tunnels.h +++ b/include/net/ip_tunnels.h @@ -467,11 +467,12 @@ static inline bool pskb_inet_may_pull(struct sk_buff = *skb) =20 /* Variant of pskb_inet_may_pull(). */ -static inline bool skb_vlan_inet_prepare(struct sk_buff *skb, - bool inner_proto_inherit) +static inline enum skb_drop_reason +skb_vlan_inet_prepare(struct sk_buff *skb, bool inner_proto_inherit) { int nhlen =3D 0, maclen =3D inner_proto_inherit ? 0 : ETH_HLEN; __be16 type =3D skb->protocol; + enum skb_drop_reason reason; =20 /* Essentially this is skb_protocol(skb, true) * And we get MAC len. @@ -492,11 +493,13 @@ static inline bool skb_vlan_inet_prepare(struct sk_bu= ff *skb, /* For ETH_P_IPV6/ETH_P_IP we make sure to pull * a base network header in skb->head. */ - if (!pskb_may_pull(skb, maclen + nhlen)) - return false; + reason =3D pskb_may_pull_reason(skb, maclen + nhlen); + if (reason) + return reason; =20 skb_set_network_header(skb, maclen); - return true; + + return SKB_NOT_DROPPED_YET; } =20 static inline int ip_encap_hlen(struct ip_tunnel_encap *e) --=20 2.39.5