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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> | |
4fbae7d8 | 26 | #include <linux/netfilter.h> |
265de6d1 MB |
27 | #include <net/ip.h> |
28 | #include <net/ip6_route.h> | |
3133822f | 29 | #include <net/netns/generic.h> |
2ad7bf36 | 30 | #include <net/rtnetlink.h> |
2ad7bf36 MB |
31 | #include <net/route.h> |
32 | #include <net/addrconf.h> | |
4fbae7d8 | 33 | #include <net/l3mdev.h> |
2ad7bf36 MB |
34 | |
35 | #define IPVLAN_DRV "ipvlan" | |
36 | #define IPV_DRV_VER "0.1" | |
37 | ||
38 | #define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE) | |
39 | #define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1) | |
40 | ||
41 | #define IPVLAN_MAC_FILTER_BITS 8 | |
42 | #define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS) | |
43 | #define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1) | |
44 | ||
ba35f858 MB |
45 | #define IPVLAN_QBACKLOG_LIMIT 1000 |
46 | ||
2ad7bf36 MB |
47 | typedef enum { |
48 | IPVL_IPV6 = 0, | |
49 | IPVL_ICMPV6, | |
50 | IPVL_IPV4, | |
51 | IPVL_ARP, | |
52 | } ipvl_hdr_type; | |
53 | ||
54 | struct ipvl_pcpu_stats { | |
55 | u64 rx_pkts; | |
56 | u64 rx_bytes; | |
57 | u64 rx_mcast; | |
58 | u64 tx_pkts; | |
59 | u64 tx_bytes; | |
60 | struct u64_stats_sync syncp; | |
61 | u32 rx_errs; | |
62 | u32 tx_drps; | |
63 | }; | |
64 | ||
65 | struct ipvl_port; | |
66 | ||
67 | struct ipvl_dev { | |
68 | struct net_device *dev; | |
69 | struct list_head pnode; | |
70 | struct ipvl_port *port; | |
71 | struct net_device *phy_dev; | |
72 | struct list_head addrs; | |
6aa6395f | 73 | struct ipvl_pcpu_stats __percpu *pcpu_stats; |
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74 | DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE); |
75 | netdev_features_t sfeatures; | |
76 | u32 msg_enable; | |
2ad7bf36 MB |
77 | }; |
78 | ||
79 | struct ipvl_addr { | |
80 | struct ipvl_dev *master; /* Back pointer to master */ | |
81 | union { | |
82 | struct in6_addr ip6; /* IPv6 address on logical interface */ | |
83 | struct in_addr ip4; /* IPv4 address on logical interface */ | |
84 | } ipu; | |
85 | #define ip6addr ipu.ip6 | |
86 | #define ip4addr ipu.ip4 | |
87 | struct hlist_node hlnode; /* Hash-table linkage */ | |
88 | struct list_head anode; /* logical-interface linkage */ | |
2ad7bf36 | 89 | ipvl_hdr_type atype; |
ab5b7013 | 90 | struct rcu_head rcu; |
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91 | }; |
92 | ||
93 | struct ipvl_port { | |
94 | struct net_device *dev; | |
3133822f | 95 | possible_net_t pnet; |
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96 | struct hlist_head hlhead[IPVLAN_HASH_SIZE]; |
97 | struct list_head ipvlans; | |
ab5b7013 | 98 | u16 mode; |
da36e13c | 99 | u16 dev_id_start; |
ba35f858 MB |
100 | struct work_struct wq; |
101 | struct sk_buff_head backlog; | |
2ad7bf36 | 102 | int count; |
009146d1 | 103 | struct ida ida; |
2ad7bf36 MB |
104 | }; |
105 | ||
e2525360 MB |
106 | struct ipvl_skb_cb { |
107 | bool tx_pkt; | |
108 | }; | |
109 | #define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0])) | |
110 | ||
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111 | static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d) |
112 | { | |
113 | return rcu_dereference(d->rx_handler_data); | |
114 | } | |
115 | ||
0fba37a3 WC |
116 | static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d) |
117 | { | |
118 | return rcu_dereference_bh(d->rx_handler_data); | |
119 | } | |
120 | ||
2ad7bf36 MB |
121 | static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d) |
122 | { | |
123 | return rtnl_dereference(d->rx_handler_data); | |
124 | } | |
125 | ||
2ad7bf36 MB |
126 | void ipvlan_init_secret(void); |
127 | unsigned int ipvlan_mac_hash(const unsigned char *addr); | |
128 | rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb); | |
ba35f858 | 129 | void ipvlan_process_multicast(struct work_struct *work); |
2ad7bf36 MB |
130 | int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev); |
131 | void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr); | |
e9997c29 JB |
132 | struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan, |
133 | const void *iaddr, bool is_v6); | |
134 | bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6); | |
6640e673 | 135 | void ipvlan_ht_addr_del(struct ipvl_addr *addr); |
4fbae7d8 MB |
136 | struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb, |
137 | u16 proto); | |
138 | unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb, | |
139 | const struct nf_hook_state *state); | |
235a9d89 SG |
140 | void ipvlan_count_rx(const struct ipvl_dev *ipvlan, |
141 | unsigned int len, bool success, bool mcast); | |
142 | int ipvlan_link_new(struct net *src_net, struct net_device *dev, | |
143 | struct nlattr *tb[], struct nlattr *data[]); | |
144 | void ipvlan_link_delete(struct net_device *dev, struct list_head *head); | |
145 | void ipvlan_link_setup(struct net_device *dev); | |
146 | int ipvlan_link_register(struct rtnl_link_ops *ops); | |
2ad7bf36 | 147 | #endif /* __IPVLAN_H */ |