/*
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* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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*/
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#ifndef __IPVLAN_H
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#define __IPVLAN_H
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/rculist.h>
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#include <linux/notifier.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/if_link.h>
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#include <linux/if_vlan.h>
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#include <linux/ip.h>
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#include <linux/inetdevice.h>
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#include <linux/netfilter.h>
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#include <net/ip.h>
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#include <net/ip6_route.h>
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#include <net/netns/generic.h>
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#include <net/rtnetlink.h>
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#include <net/route.h>
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#include <net/addrconf.h>
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#include <net/l3mdev.h>
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#define IPVLAN_DRV "ipvlan"
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#define IPV_DRV_VER "0.1"
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#define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
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#define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1)
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#define IPVLAN_MAC_FILTER_BITS 8
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#define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS)
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#define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1)
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#define IPVLAN_QBACKLOG_LIMIT 1000
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typedef enum {
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IPVL_IPV6 = 0,
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IPVL_ICMPV6,
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IPVL_IPV4,
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IPVL_ARP,
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} ipvl_hdr_type;
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struct ipvl_pcpu_stats {
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u64 rx_pkts;
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u64 rx_bytes;
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u64 rx_mcast;
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u64 tx_pkts;
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u64 tx_bytes;
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struct u64_stats_sync syncp;
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u32 rx_errs;
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u32 tx_drps;
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};
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struct ipvl_port;
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struct ipvl_dev {
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struct net_device *dev;
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struct list_head pnode;
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struct ipvl_port *port;
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struct net_device *phy_dev;
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struct list_head addrs;
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struct ipvl_pcpu_stats __percpu *pcpu_stats;
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DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
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netdev_features_t sfeatures;
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u32 msg_enable;
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spinlock_t addrs_lock;
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};
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struct ipvl_addr {
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struct ipvl_dev *master; /* Back pointer to master */
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union {
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struct in6_addr ip6; /* IPv6 address on logical interface */
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struct in_addr ip4; /* IPv4 address on logical interface */
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} ipu;
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#define ip6addr ipu.ip6
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#define ip4addr ipu.ip4
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struct hlist_node hlnode; /* Hash-table linkage */
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struct list_head anode; /* logical-interface linkage */
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ipvl_hdr_type atype;
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struct rcu_head rcu;
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};
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struct ipvl_port {
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struct net_device *dev;
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possible_net_t pnet;
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struct hlist_head hlhead[IPVLAN_HASH_SIZE];
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struct list_head ipvlans;
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u16 mode;
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u16 flags;
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u16 dev_id_start;
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struct work_struct wq;
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struct sk_buff_head backlog;
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int count;
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struct ida ida;
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};
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struct ipvl_skb_cb {
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bool tx_pkt;
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};
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#define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0]))
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static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
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{
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return rcu_dereference(d->rx_handler_data);
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}
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static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d)
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{
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return rcu_dereference_bh(d->rx_handler_data);
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}
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static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
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{
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return rtnl_dereference(d->rx_handler_data);
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}
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static inline bool ipvlan_is_private(const struct ipvl_port *port)
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{
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return !!(port->flags & IPVLAN_F_PRIVATE);
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}
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static inline void ipvlan_mark_private(struct ipvl_port *port)
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{
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port->flags |= IPVLAN_F_PRIVATE;
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}
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static inline void ipvlan_clear_private(struct ipvl_port *port)
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{
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port->flags &= ~IPVLAN_F_PRIVATE;
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}
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static inline bool ipvlan_is_vepa(const struct ipvl_port *port)
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{
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return !!(port->flags & IPVLAN_F_VEPA);
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}
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static inline void ipvlan_mark_vepa(struct ipvl_port *port)
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{
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port->flags |= IPVLAN_F_VEPA;
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}
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static inline void ipvlan_clear_vepa(struct ipvl_port *port)
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{
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port->flags &= ~IPVLAN_F_VEPA;
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}
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void ipvlan_init_secret(void);
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unsigned int ipvlan_mac_hash(const unsigned char *addr);
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rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
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void ipvlan_process_multicast(struct work_struct *work);
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int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
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void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
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struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
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const void *iaddr, bool is_v6);
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bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
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void ipvlan_ht_addr_del(struct ipvl_addr *addr);
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struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
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u16 proto);
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unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb,
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const struct nf_hook_state *state);
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void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
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unsigned int len, bool success, bool mcast);
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int ipvlan_link_new(struct net *src_net, struct net_device *dev,
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struct nlattr *tb[], struct nlattr *data[],
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struct netlink_ext_ack *extack);
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void ipvlan_link_delete(struct net_device *dev, struct list_head *head);
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void ipvlan_link_setup(struct net_device *dev);
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int ipvlan_link_register(struct rtnl_link_ops *ops);
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static inline bool netif_is_ipvlan_port(const struct net_device *dev)
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{
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return rcu_access_pointer(dev->rx_handler) == ipvlan_handle_frame;
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}
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#endif /* __IPVLAN_H */
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