1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Vxlan private header file 4 * 5 */ 6 7#ifndef _VXLAN_PRIVATE_H 8#define _VXLAN_PRIVATE_H 9 10#include <linux/rhashtable.h> 11 12extern unsigned int vxlan_net_id; 13extern const u8 all_zeros_mac[ETH_ALEN + 2]; 14extern const struct rhashtable_params vxlan_vni_rht_params; 15 16#define PORT_HASH_BITS 8 17#define PORT_HASH_SIZE (1 << PORT_HASH_BITS) 18 19/* per-network namespace private data for this module */ 20struct vxlan_net { 21 struct list_head vxlan_list; 22 struct hlist_head sock_list[PORT_HASH_SIZE]; 23 spinlock_t sock_lock; 24 struct notifier_block nexthop_notifier_block; 25}; 26 27/* Forwarding table entry */ 28struct vxlan_fdb { 29 struct hlist_node hlist; /* linked list of entries */ 30 struct rcu_head rcu; 31 unsigned long updated; /* jiffies */ 32 unsigned long used; 33 struct list_head remotes; 34 u8 eth_addr[ETH_ALEN]; 35 u16 state; /* see ndm_state */ 36 __be32 vni; 37 u16 flags; /* see ndm_flags and below */ 38 struct list_head nh_list; 39 struct nexthop __rcu *nh; 40 struct vxlan_dev __rcu *vdev; 41}; 42 43#define NTF_VXLAN_ADDED_BY_USER 0x100 44 45/* Virtual Network hash table head */ 46static inline struct hlist_head *vni_head(struct vxlan_sock *vs, __be32 vni) 47{ 48 return &vs->vni_list[hash_32((__force u32)vni, VNI_HASH_BITS)]; 49} 50 51/* Socket hash table head */ 52static inline struct hlist_head *vs_head(struct net *net, __be16 port) 53{ 54 struct vxlan_net *vn = net_generic(net, vxlan_net_id); 55 56 return &vn->sock_list[hash_32(ntohs(port), PORT_HASH_BITS)]; 57} 58 59/* First remote destination for a forwarding entry. 60 * Guaranteed to be non-NULL because remotes are never deleted. 61 */ 62static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb) 63{ 64 if (rcu_access_pointer(fdb->nh)) 65 return NULL; 66 return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list); 67} 68 69static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb) 70{ 71 if (rcu_access_pointer(fdb->nh)) 72 return NULL; 73 return list_first_entry(&fdb->remotes, struct vxlan_rdst, list); 74} 75 76#if IS_ENABLED(CONFIG_IPV6) 77static inline 78bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) 79{ 80 if (a->sa.sa_family != b->sa.sa_family) 81 return false; 82 if (a->sa.sa_family == AF_INET6) 83 return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr); 84 else 85 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; 86} 87 88static inline int vxlan_nla_get_addr(union vxlan_addr *ip, 89 const struct nlattr *nla) 90{ 91 if (nla_len(nla) >= sizeof(struct in6_addr)) { 92 ip->sin6.sin6_addr = nla_get_in6_addr(nla); 93 ip->sa.sa_family = AF_INET6; 94 return 0; 95 } else if (nla_len(nla) >= sizeof(__be32)) { 96 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); 97 ip->sa.sa_family = AF_INET; 98 return 0; 99 } else { 100 return -EAFNOSUPPORT; 101 } 102} 103 104static inline int vxlan_nla_put_addr(struct sk_buff *skb, int attr, 105 const union vxlan_addr *ip) 106{ 107 if (ip->sa.sa_family == AF_INET6) 108 return nla_put_in6_addr(skb, attr, &ip->sin6.sin6_addr); 109 else 110 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); 111} 112 113static inline bool vxlan_addr_is_multicast(const union vxlan_addr *ip) 114{ 115 if (ip->sa.sa_family == AF_INET6) 116 return ipv6_addr_is_multicast(&ip->sin6.sin6_addr); 117 else 118 return ipv4_is_multicast(ip->sin.sin_addr.s_addr); 119} 120 121#else /* !CONFIG_IPV6 */ 122 123static inline 124bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b) 125{ 126 return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr; 127} 128 129static inline int vxlan_nla_get_addr(union vxlan_addr *ip, 130 const struct nlattr *nla) 131{ 132 if (nla_len(nla) >= sizeof(struct in6_addr)) { 133 return -EAFNOSUPPORT; 134 } else if (nla_len(nla) >= sizeof(__be32)) { 135 ip->sin.sin_addr.s_addr = nla_get_in_addr(nla); 136 ip->sa.sa_family = AF_INET; 137 return 0; 138 } else { 139 return -EAFNOSUPPORT; 140 } 141} 142 143static inline int vxlan_nla_put_addr(struct sk_buff *skb, int attr, 144 const union vxlan_addr *ip) 145{ 146 return nla_put_in_addr(skb, attr, ip->sin.sin_addr.s_addr); 147} 148 149static inline bool vxlan_addr_is_multicast(const union vxlan_addr *ip) 150{ 151 return ipv4_is_multicast(ip->sin.sin_addr.s_addr); 152} 153 154#endif 155 156static inline size_t vxlan_addr_size(const union vxlan_addr *ip) 157{ 158 if (ip->sa.sa_family == AF_INET6) 159 return sizeof(struct in6_addr); 160 else 161 return sizeof(__be32); 162} 163 164static inline struct vxlan_vni_node * 165vxlan_vnifilter_lookup(struct vxlan_dev *vxlan, __be32 vni) 166{ 167 struct vxlan_vni_group *vg; 168 169 vg = rcu_dereference_rtnl(vxlan->vnigrp); 170 if (!vg) 171 return NULL; 172 173 return rhashtable_lookup_fast(&vg->vni_hash, &vni, 174 vxlan_vni_rht_params); 175} 176 177/* vxlan_core.c */ 178int vxlan_fdb_create(struct vxlan_dev *vxlan, 179 const u8 *mac, union vxlan_addr *ip, 180 __u16 state, __be16 port, __be32 src_vni, 181 __be32 vni, __u32 ifindex, __u16 ndm_flags, 182 u32 nhid, struct vxlan_fdb **fdb, 183 struct netlink_ext_ack *extack); 184int __vxlan_fdb_delete(struct vxlan_dev *vxlan, 185 const unsigned char *addr, union vxlan_addr ip, 186 __be16 port, __be32 src_vni, __be32 vni, 187 u32 ifindex, bool swdev_notify); 188u32 eth_vni_hash(const unsigned char *addr, __be32 vni); 189u32 fdb_head_index(struct vxlan_dev *vxlan, const u8 *mac, __be32 vni); 190int vxlan_fdb_update(struct vxlan_dev *vxlan, 191 const u8 *mac, union vxlan_addr *ip, 192 __u16 state, __u16 flags, 193 __be16 port, __be32 src_vni, __be32 vni, 194 __u32 ifindex, __u16 ndm_flags, u32 nhid, 195 bool swdev_notify, struct netlink_ext_ack *extack); 196void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 197 __be32 default_vni, struct vxlan_rdst *rdst, bool did_rsc); 198int vxlan_vni_in_use(struct net *src_net, struct vxlan_dev *vxlan, 199 struct vxlan_config *conf, __be32 vni); 200 201/* vxlan_vnifilter.c */ 202int vxlan_vnigroup_init(struct vxlan_dev *vxlan); 203void vxlan_vnigroup_uninit(struct vxlan_dev *vxlan); 204 205void vxlan_vnifilter_init(void); 206void vxlan_vnifilter_uninit(void); 207void vxlan_vnifilter_count(struct vxlan_dev *vxlan, __be32 vni, 208 struct vxlan_vni_node *vninode, 209 int type, unsigned int len); 210 211void vxlan_vs_add_vnigrp(struct vxlan_dev *vxlan, 212 struct vxlan_sock *vs, 213 bool ipv6); 214void vxlan_vs_del_vnigrp(struct vxlan_dev *vxlan); 215int vxlan_vnilist_update_group(struct vxlan_dev *vxlan, 216 union vxlan_addr *old_remote_ip, 217 union vxlan_addr *new_remote_ip, 218 struct netlink_ext_ack *extack); 219 220 221/* vxlan_multicast.c */ 222int vxlan_multicast_join(struct vxlan_dev *vxlan); 223int vxlan_multicast_leave(struct vxlan_dev *vxlan); 224bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev, 225 __be32 vni, union vxlan_addr *rip, int rifindex); 226int vxlan_igmp_join(struct vxlan_dev *vxlan, union vxlan_addr *rip, 227 int rifindex); 228int vxlan_igmp_leave(struct vxlan_dev *vxlan, union vxlan_addr *rip, 229 int rifindex); 230 231/* vxlan_mdb.c */ 232int vxlan_mdb_dump(struct net_device *dev, struct sk_buff *skb, 233 struct netlink_callback *cb); 234int vxlan_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags, 235 struct netlink_ext_ack *extack); 236int vxlan_mdb_del(struct net_device *dev, struct nlattr *tb[], 237 struct netlink_ext_ack *extack); 238int vxlan_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[], 239 struct netlink_ext_ack *extack); 240int vxlan_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, 241 u32 seq, struct netlink_ext_ack *extack); 242struct vxlan_mdb_entry *vxlan_mdb_entry_skb_get(struct vxlan_dev *vxlan, 243 struct sk_buff *skb, 244 __be32 src_vni); 245netdev_tx_t vxlan_mdb_xmit(struct vxlan_dev *vxlan, 246 const struct vxlan_mdb_entry *mdb_entry, 247 struct sk_buff *skb); 248int vxlan_mdb_init(struct vxlan_dev *vxlan); 249void vxlan_mdb_fini(struct vxlan_dev *vxlan); 250#endif 251