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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>4 */5#ifndef __IPVLAN_H6#define __IPVLAN_H7 8#include <linux/kernel.h>9#include <linux/types.h>10#include <linux/module.h>11#include <linux/init.h>12#include <linux/rculist.h>13#include <linux/notifier.h>14#include <linux/netdevice.h>15#include <linux/etherdevice.h>16#include <linux/if_arp.h>17#include <linux/if_link.h>18#include <linux/if_vlan.h>19#include <linux/ip.h>20#include <linux/inetdevice.h>21#include <linux/netfilter.h>22#include <net/ip.h>23#include <net/ip6_route.h>24#include <net/netns/generic.h>25#include <net/rtnetlink.h>26#include <net/route.h>27#include <net/addrconf.h>28#include <net/l3mdev.h>29 30#define IPVLAN_DRV "ipvlan"31#define IPV_DRV_VER "0.1"32 33#define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE)34#define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1)35 36#define IPVLAN_MAC_FILTER_BITS 837#define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS)38#define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1)39 40#define IPVLAN_QBACKLOG_LIMIT 100041 42typedef enum {43 IPVL_IPV6 = 0,44 IPVL_ICMPV6,45 IPVL_IPV4,46 IPVL_ARP,47} ipvl_hdr_type;48 49struct ipvl_pcpu_stats {50 u64_stats_t rx_pkts;51 u64_stats_t rx_bytes;52 u64_stats_t rx_mcast;53 u64_stats_t tx_pkts;54 u64_stats_t tx_bytes;55 struct u64_stats_sync syncp;56 u32 rx_errs;57 u32 tx_drps;58};59 60struct ipvl_port;61 62struct ipvl_dev {63 struct net_device *dev;64 struct list_head pnode;65 struct ipvl_port *port;66 struct net_device *phy_dev;67 struct list_head addrs;68 struct ipvl_pcpu_stats __percpu *pcpu_stats;69 DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);70 netdev_features_t sfeatures;71 u32 msg_enable;72 spinlock_t addrs_lock;73};74 75struct ipvl_addr {76 struct ipvl_dev *master; /* Back pointer to master */77 union {78 struct in6_addr ip6; /* IPv6 address on logical interface */79 struct in_addr ip4; /* IPv4 address on logical interface */80 } ipu;81#define ip6addr ipu.ip682#define ip4addr ipu.ip483 struct hlist_node hlnode; /* Hash-table linkage */84 struct list_head anode; /* logical-interface linkage */85 ipvl_hdr_type atype;86 struct rcu_head rcu;87};88 89struct ipvl_port {90 struct net_device *dev;91 possible_net_t pnet;92 struct hlist_head hlhead[IPVLAN_HASH_SIZE];93 struct list_head ipvlans;94 u16 mode;95 u16 flags;96 u16 dev_id_start;97 struct work_struct wq;98 struct sk_buff_head backlog;99 int count;100 struct ida ida;101 netdevice_tracker dev_tracker;102};103 104struct ipvl_skb_cb {105 bool tx_pkt;106};107#define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0]))108 109static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)110{111 return rcu_dereference(d->rx_handler_data);112}113 114static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d)115{116 return rcu_dereference_bh(d->rx_handler_data);117}118 119static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)120{121 return rtnl_dereference(d->rx_handler_data);122}123 124static inline bool ipvlan_is_private(const struct ipvl_port *port)125{126 return !!(port->flags & IPVLAN_F_PRIVATE);127}128 129static inline void ipvlan_mark_private(struct ipvl_port *port)130{131 port->flags |= IPVLAN_F_PRIVATE;132}133 134static inline void ipvlan_clear_private(struct ipvl_port *port)135{136 port->flags &= ~IPVLAN_F_PRIVATE;137}138 139static inline bool ipvlan_is_vepa(const struct ipvl_port *port)140{141 return !!(port->flags & IPVLAN_F_VEPA);142}143 144static inline void ipvlan_mark_vepa(struct ipvl_port *port)145{146 port->flags |= IPVLAN_F_VEPA;147}148 149static inline void ipvlan_clear_vepa(struct ipvl_port *port)150{151 port->flags &= ~IPVLAN_F_VEPA;152}153 154void ipvlan_init_secret(void);155unsigned int ipvlan_mac_hash(const unsigned char *addr);156rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);157void ipvlan_process_multicast(struct work_struct *work);158int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);159void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);160struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,161 const void *iaddr, bool is_v6);162bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);163void ipvlan_ht_addr_del(struct ipvl_addr *addr);164struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port, void *lyr3h,165 int addr_type, bool use_dest);166void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type);167void ipvlan_count_rx(const struct ipvl_dev *ipvlan,168 unsigned int len, bool success, bool mcast);169int ipvlan_link_new(struct net *src_net, struct net_device *dev,170 struct nlattr *tb[], struct nlattr *data[],171 struct netlink_ext_ack *extack);172void ipvlan_link_delete(struct net_device *dev, struct list_head *head);173void ipvlan_link_setup(struct net_device *dev);174int ipvlan_link_register(struct rtnl_link_ops *ops);175#ifdef CONFIG_IPVLAN_L3S176int ipvlan_l3s_register(struct ipvl_port *port);177void ipvlan_l3s_unregister(struct ipvl_port *port);178void ipvlan_migrate_l3s_hook(struct net *oldnet, struct net *newnet);179int ipvlan_l3s_init(void);180void ipvlan_l3s_cleanup(void);181#else182static inline int ipvlan_l3s_register(struct ipvl_port *port)183{184 return -ENOTSUPP;185}186 187static inline void ipvlan_l3s_unregister(struct ipvl_port *port)188{189}190 191static inline void ipvlan_migrate_l3s_hook(struct net *oldnet,192 struct net *newnet)193{194}195 196static inline int ipvlan_l3s_init(void)197{198 return 0;199}200 201static inline void ipvlan_l3s_cleanup(void)202{203}204#endif /* CONFIG_IPVLAN_L3S */205 206static inline bool netif_is_ipvlan_port(const struct net_device *dev)207{208 return rcu_access_pointer(dev->rx_handler) == ipvlan_handle_frame;209}210 211#endif /* __IPVLAN_H */212