Cregit: Linux 6.9: mpls.h

Contributors: 8
Author	Tokens	Token Proportion	Commits	Commit Proportion
Eric W. Biedermann	84	56.38%	1	10.00%
Simon Horman	38	25.50%	1	10.00%
Eli Cohen	8	5.37%	1	10.00%
Linus Torvalds (pre-git)	6	4.03%	3	30.00%
Pravin B Shelar	6	4.03%	1	10.00%
Jiri Benc	4	2.68%	1	10.00%
Thomas Gleixner	2	1.34%	1	10.00%
Andy Zhou	1	0.67%	1	10.00%
Total	149		10

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2014 Nicira, Inc.
 */

#ifndef _NET_MPLS_H
#define _NET_MPLS_H 1

#include <linux/if_ether.h>
#include <linux/netdevice.h>
#include <linux/mpls.h>

#define MPLS_HLEN 4

struct mpls_shim_hdr {
	__be32 label_stack_entry;
};

static inline bool eth_p_mpls(__be16 eth_type)
{
	return eth_type == htons(ETH_P_MPLS_UC) ||
		eth_type == htons(ETH_P_MPLS_MC);
}

static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
{
	return (struct mpls_shim_hdr *)skb_network_header(skb);
}

static inline struct mpls_shim_hdr mpls_entry_encode(u32 label,
						     unsigned int ttl,
						     unsigned int tc,
						     bool bos)
{
	struct mpls_shim_hdr result;

	result.label_stack_entry =
		cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) |
			    (tc << MPLS_LS_TC_SHIFT) |
			    (bos ? (1 << MPLS_LS_S_SHIFT) : 0) |
			    (ttl << MPLS_LS_TTL_SHIFT));
	return result;
}

#endif