/* SPDX-License-Identifier: GPL-2.0-or-later *//* * Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com> */#ifndef __IPVLAN_H#define __IPVLAN_H #include <linux/kernel.h>#include <linux/types.h>#include <linux/module.h>#include <linux/init.h>#include <linux/rculist.h>#include <linux/notifier.h>#include <linux/netdevice.h>#include <linux/etherdevice.h>#include <linux/if_arp.h>#include <linux/if_link.h>#include <linux/if_vlan.h>#include <linux/ip.h>#include <linux/inetdevice.h>#include <linux/netfilter.h>#include <net/ip.h>#include <net/ip6_route.h>#include <net/netns/generic.h>#include <net/rtnetlink.h>#include <net/route.h>#include <net/addrconf.h>#include <net/l3mdev.h> #define IPVLAN_DRV	"ipvlan"#define IPV_DRV_VER	"0.1" #define IPVLAN_HASH_SIZE	(1 << BITS_PER_BYTE)#define IPVLAN_HASH_MASK	(IPVLAN_HASH_SIZE - 1) #define IPVLAN_MAC_FILTER_BITS	8#define IPVLAN_MAC_FILTER_SIZE	(1 << IPVLAN_MAC_FILTER_BITS)#define IPVLAN_MAC_FILTER_MASK	(IPVLAN_MAC_FILTER_SIZE - 1) #define IPVLAN_QBACKLOG_LIMIT	1000 typedef enum {	IPVL_IPV6 = 0,	IPVL_ICMPV6,	IPVL_IPV4,	IPVL_ARP,} ipvl_hdr_type; struct ipvl_pcpu_stats {	u64_stats_t		rx_pkts;	u64_stats_t		rx_bytes;	u64_stats_t		rx_mcast;	u64_stats_t		tx_pkts;	u64_stats_t		tx_bytes;	struct u64_stats_sync	syncp;	u32			rx_errs;	u32			tx_drps;}; struct ipvl_port; struct ipvl_dev {	struct net_device	*dev;	struct list_head	pnode;	struct ipvl_port	*port;	struct net_device	*phy_dev;	struct list_head	addrs;	struct ipvl_pcpu_stats	__percpu *pcpu_stats;	DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);	netdev_features_t	sfeatures;	u32			msg_enable;	bool			dying;}; struct ipvl_addr {	struct ipvl_dev		*master; /* Back pointer to master */	union {		struct in6_addr	ip6;	 /* IPv6 address on logical interface */		struct in_addr	ip4;	 /* IPv4 address on logical interface */	} ipu;#define ip6addr	ipu.ip6#define ip4addr ipu.ip4	struct hlist_node	hlnode;  /* Hash-table linkage */	struct list_head	anode;   /* logical-interface linkage */	ipvl_hdr_type		atype;	struct rcu_head		rcu;}; struct ipvl_port {	struct net_device	*dev;	possible_net_t		pnet;	struct hlist_head	hlhead[IPVLAN_HASH_SIZE];	spinlock_t		addrs_lock; /* guards hash-table and addrs */	struct list_head	ipvlans;	struct mutex		pnodes_lock;	u16			mode;	u16			flags;	u16			dev_id_start;	struct work_struct	wq;	struct sk_buff_head	backlog;	refcount_t		count;	struct ida		ida;	netdevice_tracker	dev_tracker;}; struct ipvl_skb_cb {	bool tx_pkt;};#define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0])) static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d){	return rcu_dereference(d->rx_handler_data);} static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d){	return rcu_dereference_bh(d->rx_handler_data);} static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d){	return rtnl_dereference(d->rx_handler_data);} static inline bool ipvlan_is_private(const struct ipvl_port *port){	return !!(port->flags & IPVLAN_F_PRIVATE);} static inline void ipvlan_mark_private(struct ipvl_port *port){	port->flags |= IPVLAN_F_PRIVATE;} static inline void ipvlan_clear_private(struct ipvl_port *port){	port->flags &= ~IPVLAN_F_PRIVATE;} static inline bool ipvlan_is_vepa(const struct ipvl_port *port){	return !!(port->flags & IPVLAN_F_VEPA);} static inline void ipvlan_mark_vepa(struct ipvl_port *port){	port->flags |= IPVLAN_F_VEPA;} static inline void ipvlan_clear_vepa(struct ipvl_port *port){	port->flags &= ~IPVLAN_F_VEPA;} void ipvlan_init_secret(void);unsigned int ipvlan_mac_hash(const unsigned char *addr);rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);void ipvlan_process_multicast(struct work_struct *work);int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,				   const void *iaddr, bool is_v6);bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);void ipvlan_ht_addr_del(struct ipvl_addr *addr);struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port, void *lyr3h,				     int addr_type, bool use_dest);void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type);void ipvlan_count_rx(const struct ipvl_dev *ipvlan,		     unsigned int len, bool success, bool mcast);int ipvlan_link_new(struct net_device *dev, struct rtnl_newlink_params *params,		    struct netlink_ext_ack *extack);void __ipvlan_link_delete(struct net *net, struct net_device *dev,			  struct list_head *head);void ipvlan_link_setup(struct net_device *dev);int ipvlan_link_register(struct rtnl_link_ops *ops);#ifdef CONFIG_IPVLAN_L3Sint ipvlan_l3s_register(struct ipvl_port *port);void ipvlan_l3s_unregister(struct ipvl_port *port);void ipvlan_migrate_l3s_hook(struct net *oldnet, struct net *newnet);int ipvlan_l3s_init(void);void ipvlan_l3s_cleanup(void);#elsestatic inline int ipvlan_l3s_register(struct ipvl_port *port){	return -ENOTSUPP;} static inline void ipvlan_l3s_unregister(struct ipvl_port *port){} static inline void ipvlan_migrate_l3s_hook(struct net *oldnet,					   struct net *newnet){} static inline int ipvlan_l3s_init(void){	return 0;} static inline void ipvlan_l3s_cleanup(void){}#endif /* CONFIG_IPVLAN_L3S */ static inline bool netif_is_ipvlan_port(const struct net_device *dev){	return rcu_access_pointer(dev->rx_handler) == ipvlan_handle_frame;} #if IS_ENABLED(CONFIG_IPVTAP)extern void (*__ipvtap_dellink_ptr)(struct net *net, struct net_device *dev,				    struct list_head *head);#endif #endif /* __IPVLAN_H */