Merge tag 'audit-pr-20200729' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoor...
[linux-2.6-microblaze.git] / include / net / mpls.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (c) 2014 Nicira, Inc.
4  */
5
6 #ifndef _NET_MPLS_H
7 #define _NET_MPLS_H 1
8
9 #include <linux/if_ether.h>
10 #include <linux/netdevice.h>
11 #include <linux/mpls.h>
12
13 #define MPLS_HLEN 4
14
15 struct mpls_shim_hdr {
16         __be32 label_stack_entry;
17 };
18
19 static inline bool eth_p_mpls(__be16 eth_type)
20 {
21         return eth_type == htons(ETH_P_MPLS_UC) ||
22                 eth_type == htons(ETH_P_MPLS_MC);
23 }
24
25 static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
26 {
27         return (struct mpls_shim_hdr *)skb_network_header(skb);
28 }
29
30 static inline struct mpls_shim_hdr mpls_entry_encode(u32 label,
31                                                      unsigned int ttl,
32                                                      unsigned int tc,
33                                                      bool bos)
34 {
35         struct mpls_shim_hdr result;
36
37         result.label_stack_entry =
38                 cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) |
39                             (tc << MPLS_LS_TC_SHIFT) |
40                             (bos ? (1 << MPLS_LS_S_SHIFT) : 0) |
41                             (ttl << MPLS_LS_TTL_SHIFT));
42         return result;
43 }
44
45 #endif