Commit | Line | Data |
---|---|---|
f38a9eb1 TG |
1 | #ifndef __NET_DST_METADATA_H |
2 | #define __NET_DST_METADATA_H 1 | |
3 | ||
4 | #include <linux/skbuff.h> | |
5 | #include <net/ip_tunnels.h> | |
6 | #include <net/dst.h> | |
7 | ||
8 | struct metadata_dst { | |
9 | struct dst_entry dst; | |
ee122c79 TG |
10 | union { |
11 | struct ip_tunnel_info tun_info; | |
12 | } u; | |
f38a9eb1 TG |
13 | }; |
14 | ||
15 | static inline struct metadata_dst *skb_metadata_dst(struct sk_buff *skb) | |
16 | { | |
17 | struct metadata_dst *md_dst = (struct metadata_dst *) skb_dst(skb); | |
18 | ||
19 | if (md_dst && md_dst->dst.flags & DST_METADATA) | |
20 | return md_dst; | |
21 | ||
22 | return NULL; | |
23 | } | |
24 | ||
61adedf3 | 25 | static inline struct ip_tunnel_info *skb_tunnel_info(struct sk_buff *skb) |
ee122c79 TG |
26 | { |
27 | struct metadata_dst *md_dst = skb_metadata_dst(skb); | |
61adedf3 | 28 | struct dst_entry *dst; |
ee122c79 TG |
29 | |
30 | if (md_dst) | |
31 | return &md_dst->u.tun_info; | |
32 | ||
61adedf3 JB |
33 | dst = skb_dst(skb); |
34 | if (dst && dst->lwtstate) | |
35 | return lwt_tun_info(dst->lwtstate); | |
3093fbe7 | 36 | |
ee122c79 TG |
37 | return NULL; |
38 | } | |
39 | ||
f38a9eb1 TG |
40 | static inline bool skb_valid_dst(const struct sk_buff *skb) |
41 | { | |
42 | struct dst_entry *dst = skb_dst(skb); | |
43 | ||
44 | return dst && !(dst->flags & DST_METADATA); | |
45 | } | |
46 | ||
47 | struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags); | |
d3aa45ce | 48 | struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags); |
f38a9eb1 | 49 | |
4c222798 | 50 | static inline struct metadata_dst *tun_rx_dst(int md_size) |
c29a70d2 PS |
51 | { |
52 | struct metadata_dst *tun_dst; | |
c29a70d2 PS |
53 | |
54 | tun_dst = metadata_dst_alloc(md_size, GFP_ATOMIC); | |
55 | if (!tun_dst) | |
56 | return NULL; | |
57 | ||
4c222798 PS |
58 | tun_dst->u.tun_info.options_len = 0; |
59 | tun_dst->u.tun_info.mode = 0; | |
c29a70d2 PS |
60 | return tun_dst; |
61 | } | |
62 | ||
63 | static inline struct metadata_dst *ip_tun_rx_dst(struct sk_buff *skb, | |
64 | __be16 flags, | |
65 | __be64 tunnel_id, | |
66 | int md_size) | |
67 | { | |
68 | const struct iphdr *iph = ip_hdr(skb); | |
69 | struct metadata_dst *tun_dst; | |
c29a70d2 | 70 | |
4c222798 | 71 | tun_dst = tun_rx_dst(md_size); |
c29a70d2 PS |
72 | if (!tun_dst) |
73 | return NULL; | |
74 | ||
4c222798 PS |
75 | ip_tunnel_key_init(&tun_dst->u.tun_info.key, |
76 | iph->saddr, iph->daddr, iph->tos, iph->ttl, | |
77 | 0, 0, tunnel_id, flags); | |
c29a70d2 PS |
78 | return tun_dst; |
79 | } | |
80 | ||
81 | static inline struct metadata_dst *ipv6_tun_rx_dst(struct sk_buff *skb, | |
82 | __be16 flags, | |
83 | __be64 tunnel_id, | |
84 | int md_size) | |
85 | { | |
86 | const struct ipv6hdr *ip6h = ipv6_hdr(skb); | |
87 | struct metadata_dst *tun_dst; | |
88 | struct ip_tunnel_info *info; | |
89 | ||
4c222798 | 90 | tun_dst = tun_rx_dst(md_size); |
c29a70d2 PS |
91 | if (!tun_dst) |
92 | return NULL; | |
93 | ||
94 | info = &tun_dst->u.tun_info; | |
4c222798 PS |
95 | info->mode = IP_TUNNEL_INFO_IPV6; |
96 | info->key.tun_flags = flags; | |
97 | info->key.tun_id = tunnel_id; | |
98 | info->key.tp_src = 0; | |
99 | info->key.tp_dst = 0; | |
100 | ||
c29a70d2 PS |
101 | info->key.u.ipv6.src = ip6h->saddr; |
102 | info->key.u.ipv6.dst = ip6h->daddr; | |
103 | info->key.tos = ipv6_get_dsfield(ip6h); | |
104 | info->key.ttl = ip6h->hop_limit; | |
105 | return tun_dst; | |
106 | } | |
107 | ||
f38a9eb1 | 108 | #endif /* __NET_DST_METADATA_H */ |