247 lines
7.3 KiB
C
247 lines
7.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Vxlan private header file
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*
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*/
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#ifndef _VXLAN_PRIVATE_H
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#define _VXLAN_PRIVATE_H
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#include <linux/rhashtable.h>
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extern unsigned int vxlan_net_id;
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extern const u8 all_zeros_mac[ETH_ALEN + 2];
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extern const struct rhashtable_params vxlan_vni_rht_params;
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#define PORT_HASH_BITS 8
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#define PORT_HASH_SIZE (1 << PORT_HASH_BITS)
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/* per-network namespace private data for this module */
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struct vxlan_net {
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struct list_head vxlan_list;
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struct hlist_head sock_list[PORT_HASH_SIZE];
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spinlock_t sock_lock;
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struct notifier_block nexthop_notifier_block;
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};
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/* Forwarding table entry */
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struct vxlan_fdb {
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struct hlist_node hlist; /* linked list of entries */
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struct rcu_head rcu;
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unsigned long updated; /* jiffies */
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unsigned long used;
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struct list_head remotes;
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u8 eth_addr[ETH_ALEN];
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u16 state; /* see ndm_state */
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__be32 vni;
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u16 flags; /* see ndm_flags and below */
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struct list_head nh_list;
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struct nexthop __rcu *nh;
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struct vxlan_dev __rcu *vdev;
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};
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#define NTF_VXLAN_ADDED_BY_USER 0x100
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/* Virtual Network hash table head */
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static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni)
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{
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return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)];
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}
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/* Socket hash table head */
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static inline struct hlist_head *vs_head(struct net *net, __be16 port)
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{
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struct vxlan_net *vn = net_generic(net, vxlan_net_id);
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return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)];
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}
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/* First remote destination for a forwarding entry.
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* Guaranteed to be non-NULL because remotes are never deleted.
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*/
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static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
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{
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if (rcu_access_pointer(fdb->nh))
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return NULL;
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return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
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}
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static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
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{
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if (rcu_access_pointer(fdb->nh))
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return NULL;
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return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
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}
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#if IS_ENABLED(CONFIG_IPV6)
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static inline
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bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
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{
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if (a->sa.sa_family != b->sa.sa_family)
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return false;
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if (a->sa.sa_family == AF_INET6)
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return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
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else
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return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
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}
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static inline int vxlan_nla_get_addr(union vxlan_addr *ip,
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const struct nlattr *nla)
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{
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if (nla_len(nla) >= sizeof(struct in6_addr)) {
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ip->sin6.sin6_addr = nla_get_in6_addr(nla);
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ip->sa.sa_family = AF_INET6;
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return 0;
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} else if (nla_len(nla) >= sizeof(__be32)) {
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ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
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ip->sa.sa_family = AF_INET;
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return 0;
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} else {
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return -EAFNOSUPPORT;
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}
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}
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static inline int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
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const union vxlan_addr *ip)
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{
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if (ip->sa.sa_family == AF_INET6)
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return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr);
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else
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return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
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}
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static inline bool vxlan_addr_is_multicast(const union vxlan_addr *ip)
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{
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if (ip->sa.sa_family == AF_INET6)
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return ipv6_addr_is_multicast(&ip->sin6.sin6_addr);
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else
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return ipv4_is_multicast(ip->sin.sin_addr.s_addr);
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}
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#else /* !CONFIG_IPV6 */
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static inline
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bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
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{
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return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
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}
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static inline int vxlan_nla_get_addr(union vxlan_addr *ip,
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const struct nlattr *nla)
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{
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if (nla_len(nla) >= sizeof(struct in6_addr)) {
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return -EAFNOSUPPORT;
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} else if (nla_len(nla) >= sizeof(__be32)) {
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ip->sin.sin_addr.s_addr = nla_get_in_addr(nla);
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ip->sa.sa_family = AF_INET;
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return 0;
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} else {
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return -EAFNOSUPPORT;
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}
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}
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static inline int vxlan_nla_put_addr(struct sk_buff *skb, int attr,
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const union vxlan_addr *ip)
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{
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return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr);
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}
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static inline bool vxlan_addr_is_multicast(const union vxlan_addr *ip)
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{
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return ipv4_is_multicast(ip->sin.sin_addr.s_addr);
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}
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#endif
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static inline size_t vxlan_addr_size(const union vxlan_addr *ip)
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{
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if (ip->sa.sa_family == AF_INET6)
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return sizeof(struct in6_addr);
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else
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return sizeof(__be32);
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}
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static inline struct vxlan_vni_node *
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vxlan_vnifilter_lookup(struct vxlan_dev *vxlan, __be32 vni)
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{
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struct vxlan_vni_group *vg;
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vg = rcu_dereference_rtnl(vxlan->vnigrp);
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if (!vg)
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return NULL;
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return rhashtable_lookup_fast(&vg->vni_hash, &vni,
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vxlan_vni_rht_params);
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}
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/* vxlan_core.c */
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int vxlan_fdb_create(struct vxlan_dev *vxlan,
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const u8 *mac, union vxlan_addr *ip,
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__u16 state, __be16 port, __be32 src_vni,
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__be32 vni, __u32 ifindex, __u16 ndm_flags,
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u32 nhid, struct vxlan_fdb **fdb,
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struct netlink_ext_ack *extack);
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int __vxlan_fdb_delete(struct vxlan_dev *vxlan,
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const unsigned char *addr, union vxlan_addr ip,
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__be16 port, __be32 src_vni, __be32 vni,
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u32 ifindex, bool swdev_notify);
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u32 eth_vni_hash(const unsigned char *addr, __be32 vni);
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u32 fdb_head_index(struct vxlan_dev *vxlan, const u8 *mac, __be32 vni);
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int vxlan_fdb_update(struct vxlan_dev *vxlan,
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const u8 *mac, union vxlan_addr *ip,
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__u16 state, __u16 flags,
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__be16 port, __be32 src_vni, __be32 vni,
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__u32 ifindex, __u16 ndm_flags, u32 nhid,
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bool swdev_notify, struct netlink_ext_ack *extack);
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void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
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__be32 default_vni, struct vxlan_rdst *rdst, bool did_rsc);
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int vxlan_vni_in_use(struct net *src_net, struct vxlan_dev *vxlan,
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struct vxlan_config *conf, __be32 vni);
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/* vxlan_vnifilter.c */
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int vxlan_vnigroup_init(struct vxlan_dev *vxlan);
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void vxlan_vnigroup_uninit(struct vxlan_dev *vxlan);
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void vxlan_vnifilter_init(void);
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void vxlan_vnifilter_uninit(void);
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void vxlan_vnifilter_count(struct vxlan_dev *vxlan, __be32 vni,
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struct vxlan_vni_node *vninode,
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int type, unsigned int len);
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void vxlan_vs_add_vnigrp(struct vxlan_dev *vxlan,
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struct vxlan_sock *vs,
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bool ipv6);
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void vxlan_vs_del_vnigrp(struct vxlan_dev *vxlan);
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int vxlan_vnilist_update_group(struct vxlan_dev *vxlan,
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union vxlan_addr *old_remote_ip,
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union vxlan_addr *new_remote_ip,
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struct netlink_ext_ack *extack);
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/* vxlan_multicast.c */
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int vxlan_multicast_join(struct vxlan_dev *vxlan);
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int vxlan_multicast_leave(struct vxlan_dev *vxlan);
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bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev,
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__be32 vni, union vxlan_addr *rip, int rifindex);
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int vxlan_igmp_join(struct vxlan_dev *vxlan, union vxlan_addr *rip,
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int rifindex);
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int vxlan_igmp_leave(struct vxlan_dev *vxlan, union vxlan_addr *rip,
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int rifindex);
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/* vxlan_mdb.c */
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int vxlan_mdb_dump(struct net_device *dev, struct sk_buff *skb,
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struct netlink_callback *cb);
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int vxlan_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
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struct netlink_ext_ack *extack);
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int vxlan_mdb_del(struct net_device *dev, struct nlattr *tb[],
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struct netlink_ext_ack *extack);
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struct vxlan_mdb_entry *vxlan_mdb_entry_skb_get(struct vxlan_dev *vxlan,
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struct sk_buff *skb,
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__be32 src_vni);
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netdev_tx_t vxlan_mdb_xmit(struct vxlan_dev *vxlan,
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const struct vxlan_mdb_entry *mdb_entry,
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struct sk_buff *skb);
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int vxlan_mdb_init(struct vxlan_dev *vxlan);
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void vxlan_mdb_fini(struct vxlan_dev *vxlan);
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#endif
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