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https://github.com/edk2-porting/linux-next.git
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face0188e3
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
#ifndef MPLS_INTERNAL_H
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#define MPLS_INTERNAL_H
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struct mpls_shim_hdr {
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__be32 label_stack_entry;
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};
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struct mpls_entry_decoded {
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u32 label;
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u8 ttl;
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u8 tc;
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u8 bos;
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};
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struct mpls_dev {
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int input_enabled;
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struct ctl_table_header *sysctl;
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struct rcu_head rcu;
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};
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struct sk_buff;
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static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
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{
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return (struct mpls_shim_hdr *)skb_network_header(skb);
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}
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static inline struct mpls_shim_hdr mpls_entry_encode(u32 label, unsigned ttl, unsigned tc, bool bos)
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{
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struct mpls_shim_hdr result;
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result.label_stack_entry =
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cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) |
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(tc << MPLS_LS_TC_SHIFT) |
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(bos ? (1 << MPLS_LS_S_SHIFT) : 0) |
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(ttl << MPLS_LS_TTL_SHIFT));
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return result;
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}
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static inline struct mpls_entry_decoded mpls_entry_decode(struct mpls_shim_hdr *hdr)
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{
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struct mpls_entry_decoded result;
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unsigned entry = be32_to_cpu(hdr->label_stack_entry);
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result.label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT;
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result.ttl = (entry & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT;
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result.tc = (entry & MPLS_LS_TC_MASK) >> MPLS_LS_TC_SHIFT;
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result.bos = (entry & MPLS_LS_S_MASK) >> MPLS_LS_S_SHIFT;
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return result;
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}
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int nla_put_labels(struct sk_buff *skb, int attrtype, u8 labels,
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const u32 label[]);
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int nla_get_labels(const struct nlattr *nla, u32 max_labels, u32 *labels,
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u32 label[]);
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bool mpls_output_possible(const struct net_device *dev);
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unsigned int mpls_dev_mtu(const struct net_device *dev);
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bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu);
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#endif /* MPLS_INTERNAL_H */
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