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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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3093fbe7ff
This introduces a new IP tunnel lightweight tunnel type which allows to specify IP tunnel instructions per route. Only IPv4 is supported at this point. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
#ifndef __NET_DST_METADATA_H
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#define __NET_DST_METADATA_H 1
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#include <linux/skbuff.h>
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#include <net/ip_tunnels.h>
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#include <net/dst.h>
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struct metadata_dst {
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struct dst_entry dst;
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size_t opts_len;
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union {
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struct ip_tunnel_info tun_info;
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} u;
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};
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static inline struct metadata_dst *skb_metadata_dst(struct sk_buff *skb)
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{
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struct metadata_dst *md_dst = (struct metadata_dst *) skb_dst(skb);
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if (md_dst && md_dst->dst.flags & DST_METADATA)
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return md_dst;
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return NULL;
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}
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static inline struct ip_tunnel_info *skb_tunnel_info(struct sk_buff *skb,
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int family)
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{
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struct metadata_dst *md_dst = skb_metadata_dst(skb);
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struct rtable *rt;
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if (md_dst)
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return &md_dst->u.tun_info;
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switch (family) {
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case AF_INET:
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rt = (struct rtable *)skb_dst(skb);
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if (rt && rt->rt_lwtstate)
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return lwt_tun_info(rt->rt_lwtstate);
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break;
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}
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return NULL;
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}
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static inline bool skb_valid_dst(const struct sk_buff *skb)
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{
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struct dst_entry *dst = skb_dst(skb);
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return dst && !(dst->flags & DST_METADATA);
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}
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struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags);
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#endif /* __NET_DST_METADATA_H */
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