96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
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/* 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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extern unsigned int vxlan_net_id;
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extern const u8 all_zeros_mac[ETH_ALEN + 2];
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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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#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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#endif
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#endif
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