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AJvYcCWgSdAwIM3Re2HWVtzsaTuB52HAJZIV1bDuUvZyqQcQ8DR+UfoOx6XOkEGZCkANcUaKmnQqFmgTx1PGWnU=@vger.kernel.org, AJvYcCWgXE01d+A4wzG9SbCZgCQa0ftCruk51CratDYouJxJIAuU0xGFzU1v2yQjm4A/7Q4PAvYHFjv9@vger.kernel.org X-Gm-Message-State: AOJu0Ywl69ZDP8wYd27hKq5+tfW0cpHkhPfD9zORpNw/8vNIdQfQF+Oz 1nqU2sjcQSJ7Hs/Ezqntee7v/aEaBpMHrJqu2r70O4icHwYsevZR X-Google-Smtp-Source: AGHT+IHZp64FJEgkxIjfb5hkwn93eyOxhXrd0JpIvjRjmLIKdf3Wrlpbxed7WIDkByJi9EMCr7yCWA== X-Received: by 2002:a17:903:181:b0:20c:2e3:7139 with SMTP id d9443c01a7336-20c02e37166mr88595595ad.24.1728197851942; Sat, 05 Oct 2024 23:57:31 -0700 (PDT) Received: from localhost.localdomain ([43.129.25.208]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20c138af813sm21749865ad.9.2024.10.05.23.57.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Oct 2024 23:57:31 -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 v5 07/12] net: vxlan: make vxlan_set_mac() return drop reasons Date: Sun, 6 Oct 2024 14:56:11 +0800 Message-Id: <20241006065616.2563243-8-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241006065616.2563243-1-dongml2@chinatelecom.cn> References: <20241006065616.2563243-1-dongml2@chinatelecom.cn> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Change the return type of vxlan_set_mac() from bool to enum skb_drop_reason. In this commit, the drop reason "SKB_DROP_REASON_LOCAL_MAC" is introduced for the case that the source mac of the packet is a local mac. Signed-off-by: Menglong Dong Reviewed-by: Simon Horman --- v5: - modify the document of SKB_DROP_REASON_LOCAL_MAC v3: - adjust the call of vxlan_set_mac() - add SKB_DROP_REASON_LOCAL_MAC --- drivers/net/vxlan/vxlan_core.c | 19 ++++++++++--------- include/net/dropreason-core.h | 6 ++++++ 2 files changed, 16 insertions(+), 9 deletions(-) diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index 1a81a3957327..41191a28252a 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -1609,9 +1609,9 @@ static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed, unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS; } -static bool vxlan_set_mac(struct vxlan_dev *vxlan, - struct vxlan_sock *vs, - struct sk_buff *skb, __be32 vni) +static enum skb_drop_reason vxlan_set_mac(struct vxlan_dev *vxlan, + struct vxlan_sock *vs, + struct sk_buff *skb, __be32 vni) { union vxlan_addr saddr; u32 ifindex = skb->dev->ifindex; @@ -1622,7 +1622,7 @@ static bool vxlan_set_mac(struct vxlan_dev *vxlan, /* Ignore packet loops (and multicast echo) */ if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr)) - return false; + return SKB_DROP_REASON_LOCAL_MAC; /* Get address from the outer IP header */ if (vxlan_get_sk_family(vs) == AF_INET) { @@ -1635,11 +1635,11 @@ static bool vxlan_set_mac(struct vxlan_dev *vxlan, #endif } - if ((vxlan->cfg.flags & VXLAN_F_LEARN) && - vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, ifindex, vni)) - return false; + if (!(vxlan->cfg.flags & VXLAN_F_LEARN)) + return SKB_NOT_DROPPED_YET; - return true; + return vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, + ifindex, vni); } static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph, @@ -1774,7 +1774,8 @@ static int vxlan_rcv(struct sock *sk, struct sk_buff *skb) } if (!raw_proto) { - if (!vxlan_set_mac(vxlan, vs, skb, vni)) + reason = vxlan_set_mac(vxlan, vs, skb, vni); + if (reason) goto drop; } else { skb_reset_mac_header(skb); diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h index 1cb8d7c953be..fbf92d442c1b 100644 --- a/include/net/dropreason-core.h +++ b/include/net/dropreason-core.h @@ -97,6 +97,7 @@ FN(MAC_INVALID_SOURCE) \ FN(VXLAN_ENTRY_EXISTS) \ FN(IP_TUNNEL_ECN) \ + FN(LOCAL_MAC) \ FNe(MAX) /** @@ -443,6 +444,11 @@ enum skb_drop_reason { * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. */ SKB_DROP_REASON_IP_TUNNEL_ECN, + /** + * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to + * the MAC address of the local netdev. + */ + SKB_DROP_REASON_LOCAL_MAC, /** * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which * shouldn't be used as a real 'reason' - only for tracing code gen