vxlan_core: move common declarations to private header file

This patch moves common structures and global declarations
to a shared private headerfile vxlan_private.h. Subsequent
patches use this header file as a common header file for
additional shared declarations.

Signed-off-by: Roopa Prabhu <roopa@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 95 insertions, 0 deletions

diff --git a/drivers/net/vxlan/vxlan_private.h b/drivers/net/vxlan/vxlan_private.h
new file mode 100644
index 000000000000..03fa955cf79f
--- /dev/null
+++ b/drivers/net/vxlan/vxlan_private.h
@@ -0,0 +1,95 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *	Vxlan private header file
+ *
+ */
+
+#ifndef _VXLAN_PRIVATE_H
+#define _VXLAN_PRIVATE_H
+
+extern unsigned int vxlan_net_id;
+extern const u8 all_zeros_mac[ETH_ALEN + 2];
+
+#define PORT_HASH_BITS	8
+#define PORT_HASH_SIZE  (1 << PORT_HASH_BITS)
+
+/* per-network namespace private data for this module */
+struct vxlan_net {
+	struct list_head  vxlan_list;
+	struct hlist_head sock_list[PORT_HASH_SIZE];
+	spinlock_t	  sock_lock;
+	struct notifier_block nexthop_notifier_block;
+};
+
+/* Forwarding table entry */
+struct vxlan_fdb {
+	struct hlist_node hlist;	/* linked list of entries */
+	struct rcu_head	  rcu;
+	unsigned long	  updated;	/* jiffies */
+	unsigned long	  used;
+	struct list_head  remotes;
+	u8		  eth_addr[ETH_ALEN];
+	u16		  state;	/* see ndm_state */
+	__be32		  vni;
+	u16		  flags;	/* see ndm_flags and below */
+	struct list_head  nh_list;
+	struct nexthop __rcu *nh;
+	struct vxlan_dev  __rcu *vdev;
+};
+
+#define NTF_VXLAN_ADDED_BY_USER 0x100
+
+/* Virtual Network hash table head */
+static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni)
+{
+	return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)];
+}
+
+/* Socket hash table head */
+static inline struct hlist_head *vs_head(struct net *net, __be16 port)
+{
+	struct vxlan_net *vn = net_generic(net, vxlan_net_id);
+
+	return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
+}
+
+/* First remote destination for a forwarding entry.
+ * Guaranteed to be non-NULL because remotes are never deleted.
+ */
+static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
+{
+	if (rcu_access_pointer(fdb->nh))
+		return NULL;
+	return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
+}
+
+static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
+{
+	if (rcu_access_pointer(fdb->nh))
+		return NULL;
+	return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static inline
+bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
+{
+	if (a->sa.sa_family != b->sa.sa_family)
+		return false;
+	if (a->sa.sa_family == AF_INET6)
+		return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
+	else
+		return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
+}
+
+#else /* !CONFIG_IPV6 */
+
+static inline
+bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
+{
+	return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
+}
+
+#endif
+
+#endif