| Mahesh Bandewar | 2ad7bf3 | 2014-11-23 23:07:46 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License as |
| 6 | * published by the Free Software Foundation; either version 2 of |
| 7 | * the License, or (at your option) any later version. |
| 8 | * |
| 9 | */ |
| 10 | #ifndef __IPVLAN_H |
| 11 | #define __IPVLAN_H |
| 12 | |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/rculist.h> |
| 18 | #include <linux/notifier.h> |
| 19 | #include <linux/netdevice.h> |
| 20 | #include <linux/etherdevice.h> |
| 21 | #include <linux/if_arp.h> |
| 22 | #include <linux/if_link.h> |
| 23 | #include <linux/if_vlan.h> |
| 24 | #include <linux/ip.h> |
| 25 | #include <linux/inetdevice.h> |
| 26 | #include <net/rtnetlink.h> |
| 27 | #include <net/gre.h> |
| 28 | #include <net/route.h> |
| 29 | #include <net/addrconf.h> |
| 30 | |
| 31 | #define IPVLAN_DRV "ipvlan" |
| 32 | #define IPV_DRV_VER "0.1" |
| 33 | |
| 34 | #define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE) |
| 35 | #define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1) |
| 36 | |
| 37 | #define IPVLAN_MAC_FILTER_BITS 8 |
| 38 | #define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS) |
| 39 | #define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1) |
| 40 | |
| 41 | typedef enum { |
| 42 | IPVL_IPV6 = 0, |
| 43 | IPVL_ICMPV6, |
| 44 | IPVL_IPV4, |
| 45 | IPVL_ARP, |
| 46 | } ipvl_hdr_type; |
| 47 | |
| 48 | struct ipvl_pcpu_stats { |
| 49 | u64 rx_pkts; |
| 50 | u64 rx_bytes; |
| 51 | u64 rx_mcast; |
| 52 | u64 tx_pkts; |
| 53 | u64 tx_bytes; |
| 54 | struct u64_stats_sync syncp; |
| 55 | u32 rx_errs; |
| 56 | u32 tx_drps; |
| 57 | }; |
| 58 | |
| 59 | struct ipvl_port; |
| 60 | |
| 61 | struct ipvl_dev { |
| 62 | struct net_device *dev; |
| 63 | struct list_head pnode; |
| 64 | struct ipvl_port *port; |
| 65 | struct net_device *phy_dev; |
| 66 | struct list_head addrs; |
| 67 | int ipv4cnt; |
| 68 | int ipv6cnt; |
| 69 | struct ipvl_pcpu_stats *pcpu_stats; |
| 70 | DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE); |
| 71 | netdev_features_t sfeatures; |
| 72 | u32 msg_enable; |
| 73 | u16 mtu_adj; |
| 74 | }; |
| 75 | |
| 76 | struct ipvl_addr { |
| 77 | struct ipvl_dev *master; /* Back pointer to master */ |
| 78 | union { |
| 79 | struct in6_addr ip6; /* IPv6 address on logical interface */ |
| 80 | struct in_addr ip4; /* IPv4 address on logical interface */ |
| 81 | } ipu; |
| 82 | #define ip6addr ipu.ip6 |
| 83 | #define ip4addr ipu.ip4 |
| 84 | struct hlist_node hlnode; /* Hash-table linkage */ |
| 85 | struct list_head anode; /* logical-interface linkage */ |
| 86 | struct rcu_head rcu; |
| 87 | ipvl_hdr_type atype; |
| 88 | }; |
| 89 | |
| 90 | struct ipvl_port { |
| 91 | struct net_device *dev; |
| 92 | struct hlist_head hlhead[IPVLAN_HASH_SIZE]; |
| 93 | struct list_head ipvlans; |
| 94 | struct rcu_head rcu; |
| 95 | int count; |
| 96 | u16 mode; |
| 97 | }; |
| 98 | |
| 99 | static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d) |
| 100 | { |
| 101 | return rcu_dereference(d->rx_handler_data); |
| 102 | } |
| 103 | |
| 104 | static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d) |
| 105 | { |
| 106 | return rtnl_dereference(d->rx_handler_data); |
| 107 | } |
| 108 | |
| 109 | static inline bool ipvlan_dev_master(struct net_device *d) |
| 110 | { |
| 111 | return d->priv_flags & IFF_IPVLAN_MASTER; |
| 112 | } |
| 113 | |
| 114 | static inline bool ipvlan_dev_slave(struct net_device *d) |
| 115 | { |
| 116 | return d->priv_flags & IFF_IPVLAN_SLAVE; |
| 117 | } |
| 118 | |
| 119 | void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev); |
| 120 | void ipvlan_set_port_mode(struct ipvl_port *port, u32 nval); |
| 121 | void ipvlan_init_secret(void); |
| 122 | unsigned int ipvlan_mac_hash(const unsigned char *addr); |
| 123 | rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb); |
| 124 | int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev); |
| 125 | void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr); |
| 126 | bool ipvlan_addr_busy(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6); |
| 127 | struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port, |
| 128 | const void *iaddr, bool is_v6); |
| 129 | void ipvlan_ht_addr_del(struct ipvl_addr *addr, bool sync); |
| 130 | #endif /* __IPVLAN_H */ |