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2023-12-11 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4

 kernel/include/net/vxlan.h
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@@ -5,7 +5,11 @@
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 #include <linux/if_vlan.h>
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 #include <net/udp_tunnel.h>
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 #include <net/dst_metadata.h>
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-#include <net/udp_tunnel.h>
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+#include <net/rtnetlink.h>
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+#include <net/switchdev.h>
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+#include <net/nexthop.h>
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+
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+#define IANA_VXLAN_UDP_PORT     4789
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 /* VXLAN protocol (RFC 7348) header:
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  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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@@ -117,6 +121,9 @@
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 #define VXLAN_GBP_POLICY_APPLIED	(BIT(3) << 16)
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 #define VXLAN_GBP_ID_MASK		(0xFFFF)
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123
 
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+#define VXLAN_GBP_MASK (VXLAN_GBP_DONT_LEARN | VXLAN_GBP_POLICY_APPLIED | \
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+			VXLAN_GBP_ID_MASK)
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+
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 /*
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  * VXLAN Generic Protocol Extension (VXLAN_F_GPE):
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  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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@@ -191,8 +198,10 @@
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 struct vxlan_rdst {
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 	union vxlan_addr	 remote_ip;
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 	__be16			 remote_port;
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+	u8			 offloaded:1;
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 	__be32			 remote_vni;
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 	u32			 remote_ifindex;
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+	struct net_device	 *remote_dev;
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 	struct list_head	 list;
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 	struct rcu_head		 rcu;
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 	struct dst_cache	 dst_cache;
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@@ -214,6 +223,7 @@
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 	unsigned long		age_interval;
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 	unsigned int		addrmax;
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 	bool			no_share;
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+	enum ifla_vxlan_df	df;
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 };
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 struct vxlan_dev_node {
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@@ -237,7 +247,7 @@
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 	struct vxlan_rdst default_dst;	/* default destination */
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 	struct timer_list age_timer;
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-	spinlock_t	  hash_lock;
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+	spinlock_t	  hash_lock[FDB_HASH_SIZE];
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 	unsigned int	  addrcnt;
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 	struct gro_cells  gro_cells;
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253
 
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@@ -371,4 +381,138 @@
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 	return vs->sock->sk->sk_family;
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 }
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383
 
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+#if IS_ENABLED(CONFIG_IPV6)
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+
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+static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
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+{
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+	if (ipa->sa.sa_family == AF_INET6)
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+		return ipv6_addr_any(&ipa->sin6.sin6_addr);
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+	else
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+		return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
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+}
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+
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+static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
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+{
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+	if (ipa->sa.sa_family == AF_INET6)
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+		return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
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+	else
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+		return ipv4_is_multicast(ipa->sin.sin_addr.s_addr);
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+}
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+
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+#else /* !IS_ENABLED(CONFIG_IPV6) */
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+
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+static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
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+{
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+	return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
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+}
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+
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+static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
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+{
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+	return ipv4_is_multicast(ipa->sin.sin_addr.s_addr);
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+}
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+
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+#endif /* IS_ENABLED(CONFIG_IPV6) */
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+
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+static inline bool netif_is_vxlan(const struct net_device *dev)
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+{
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+	return dev->rtnl_link_ops &&
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+	       !strcmp(dev->rtnl_link_ops->kind, "vxlan");
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+}
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+
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+struct switchdev_notifier_vxlan_fdb_info {
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+	struct switchdev_notifier_info info; /* must be first */
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+	union vxlan_addr remote_ip;
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+	__be16 remote_port;
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+	__be32 remote_vni;
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+	u32 remote_ifindex;
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+	u8 eth_addr[ETH_ALEN];
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+	__be32 vni;
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+	bool offloaded;
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+	bool added_by_user;
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+};
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+
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+#if IS_ENABLED(CONFIG_VXLAN)
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+int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
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+		      struct switchdev_notifier_vxlan_fdb_info *fdb_info);
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+int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
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+		     struct notifier_block *nb,
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+		     struct netlink_ext_ack *extack);
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+void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni);
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+
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+#else
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+static inline int
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+vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
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+		  struct switchdev_notifier_vxlan_fdb_info *fdb_info)
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+{
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+	return -ENOENT;
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+}
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+
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+static inline int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
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+				   struct notifier_block *nb,
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+				   struct netlink_ext_ack *extack)
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+{
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+	return -EOPNOTSUPP;
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+}
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+
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+static inline void
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+vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni)
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+{
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+}
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+#endif
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+
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+static inline void vxlan_flag_attr_error(int attrtype,
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+					 struct netlink_ext_ack *extack)
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+{
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+#define VXLAN_FLAG(flg) \
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+	case IFLA_VXLAN_##flg: \
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+		NL_SET_ERR_MSG_MOD(extack, \
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+				   "cannot change " #flg " flag"); \
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+		break
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+	switch (attrtype) {
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+	VXLAN_FLAG(TTL_INHERIT);
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+	VXLAN_FLAG(LEARNING);
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+	VXLAN_FLAG(PROXY);
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+	VXLAN_FLAG(RSC);
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+	VXLAN_FLAG(L2MISS);
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+	VXLAN_FLAG(L3MISS);
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+	VXLAN_FLAG(COLLECT_METADATA);
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+	VXLAN_FLAG(UDP_ZERO_CSUM6_TX);
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+	VXLAN_FLAG(UDP_ZERO_CSUM6_RX);
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+	VXLAN_FLAG(REMCSUM_TX);
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+	VXLAN_FLAG(REMCSUM_RX);
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+	VXLAN_FLAG(GBP);
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+	VXLAN_FLAG(GPE);
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+	VXLAN_FLAG(REMCSUM_NOPARTIAL);
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+	default:
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+		NL_SET_ERR_MSG_MOD(extack, \
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+				   "cannot change flag");
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+		break;
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+	}
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+#undef VXLAN_FLAG
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+}
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+
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+static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh,
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+					    int hash,
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+					    struct vxlan_rdst *rdst)
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+{
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+	struct fib_nh_common *nhc;
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+
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+	nhc = nexthop_path_fdb_result(nh, hash);
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+	if (unlikely(!nhc))
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+		return false;
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+
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+	switch (nhc->nhc_gw_family) {
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+	case AF_INET:
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+		rdst->remote_ip.sin.sin_addr.s_addr = nhc->nhc_gw.ipv4;
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+		rdst->remote_ip.sa.sa_family = AF_INET;
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+		break;
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+	case AF_INET6:
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+		rdst->remote_ip.sin6.sin6_addr = nhc->nhc_gw.ipv6;
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+		rdst->remote_ip.sa.sa_family = AF_INET6;
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+		break;
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+	}
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+
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+	return true;
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+}
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+
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 #endif