diff options
Diffstat (limited to 'kernel/net/mpls/internal.h')
| -rw-r--r-- | kernel/net/mpls/internal.h | 81 |
1 files changed, 79 insertions, 2 deletions
diff --git a/kernel/net/mpls/internal.h b/kernel/net/mpls/internal.h index 8cabeb5a1..bde52ce88 100644 --- a/kernel/net/mpls/internal.h +++ b/kernel/net/mpls/internal.h @@ -21,6 +21,76 @@ struct mpls_dev { struct sk_buff; +#define LABEL_NOT_SPECIFIED (1 << 20) +#define MAX_NEW_LABELS 2 + +/* This maximum ha length copied from the definition of struct neighbour */ +#define VIA_ALEN_ALIGN sizeof(unsigned long) +#define MAX_VIA_ALEN (ALIGN(MAX_ADDR_LEN, VIA_ALEN_ALIGN)) + +enum mpls_payload_type { + MPT_UNSPEC, /* IPv4 or IPv6 */ + MPT_IPV4 = 4, + MPT_IPV6 = 6, + + /* Other types not implemented: + * - Pseudo-wire with or without control word (RFC4385) + * - GAL (RFC5586) + */ +}; + +struct mpls_nh { /* next hop label forwarding entry */ + struct net_device __rcu *nh_dev; + u32 nh_label[MAX_NEW_LABELS]; + u8 nh_labels; + u8 nh_via_alen; + u8 nh_via_table; +}; + +/* The route, nexthops and vias are stored together in the same memory + * block: + * + * +----------------------+ + * | mpls_route | + * +----------------------+ + * | mpls_nh 0 | + * +----------------------+ + * | ... | + * +----------------------+ + * | mpls_nh n-1 | + * +----------------------+ + * | alignment padding | + * +----------------------+ + * | via[rt_max_alen] 0 | + * +----------------------+ + * | ... | + * +----------------------+ + * | via[rt_max_alen] n-1 | + * +----------------------+ + */ +struct mpls_route { /* next hop label forwarding entry */ + struct rcu_head rt_rcu; + u8 rt_protocol; + u8 rt_payload_type; + u8 rt_max_alen; + unsigned int rt_nhn; + struct mpls_nh rt_nh[0]; +}; + +#define for_nexthops(rt) { \ + int nhsel; struct mpls_nh *nh; \ + for (nhsel = 0, nh = (rt)->rt_nh; \ + nhsel < (rt)->rt_nhn; \ + nh++, nhsel++) + +#define change_nexthops(rt) { \ + int nhsel; struct mpls_nh *nh; \ + for (nhsel = 0, nh = (struct mpls_nh *)((rt)->rt_nh); \ + nhsel < (rt)->rt_nhn; \ + nh++, nhsel++) + +#define endfor_nexthops(rt) } + static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb) { return (struct mpls_shim_hdr *)skb_network_header(skb); @@ -50,7 +120,14 @@ static inline struct mpls_entry_decoded mpls_entry_decode(struct mpls_shim_hdr * return result; } -int nla_put_labels(struct sk_buff *skb, int attrtype, u8 labels, const u32 label[]); -int nla_get_labels(const struct nlattr *nla, u32 max_labels, u32 *labels, u32 label[]); +int nla_put_labels(struct sk_buff *skb, int attrtype, u8 labels, + const u32 label[]); +int nla_get_labels(const struct nlattr *nla, u32 max_labels, u8 *labels, + u32 label[]); +int nla_get_via(const struct nlattr *nla, u8 *via_alen, u8 *via_table, + u8 via[]); +bool mpls_output_possible(const struct net_device *dev); +unsigned int mpls_dev_mtu(const struct net_device *dev); +bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu); #endif /* MPLS_INTERNAL_H */ |