forked from Minki/linux
52d0378645
This patch anticipates the support for the IOAM insertion inside in-transit packets, by making a difference between input and output in order to determine the right value for its hop-limit (inherited from the IPv6 hop-limit). Input case: happens before ip6_forward, the IPv6 hop-limit is not decremented yet -> decrement the IOAM hop-limit to reflect the new hop inside the trace. Output case: happens after ip6_forward, the IPv6 hop-limit has already been decremented -> keep the same value for the IOAM hop-limit. Signed-off-by: Justin Iurman <justin.iurman@uliege.be> Signed-off-by: David S. Miller <davem@davemloft.net>
69 lines
1.2 KiB
C
69 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* IPv6 IOAM implementation
|
|
*
|
|
* Author:
|
|
* Justin Iurman <justin.iurman@uliege.be>
|
|
*/
|
|
|
|
#ifndef _NET_IOAM6_H
|
|
#define _NET_IOAM6_H
|
|
|
|
#include <linux/net.h>
|
|
#include <linux/ipv6.h>
|
|
#include <linux/ioam6.h>
|
|
#include <linux/rhashtable-types.h>
|
|
|
|
struct ioam6_namespace {
|
|
struct rhash_head head;
|
|
struct rcu_head rcu;
|
|
|
|
struct ioam6_schema __rcu *schema;
|
|
|
|
__be16 id;
|
|
__be32 data;
|
|
__be64 data_wide;
|
|
};
|
|
|
|
struct ioam6_schema {
|
|
struct rhash_head head;
|
|
struct rcu_head rcu;
|
|
|
|
struct ioam6_namespace __rcu *ns;
|
|
|
|
u32 id;
|
|
int len;
|
|
__be32 hdr;
|
|
|
|
u8 data[0];
|
|
};
|
|
|
|
struct ioam6_pernet_data {
|
|
struct mutex lock;
|
|
struct rhashtable namespaces;
|
|
struct rhashtable schemas;
|
|
};
|
|
|
|
static inline struct ioam6_pernet_data *ioam6_pernet(struct net *net)
|
|
{
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
return net->ipv6.ioam6_data;
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
struct ioam6_namespace *ioam6_namespace(struct net *net, __be16 id);
|
|
void ioam6_fill_trace_data(struct sk_buff *skb,
|
|
struct ioam6_namespace *ns,
|
|
struct ioam6_trace_hdr *trace,
|
|
bool is_input);
|
|
|
|
int ioam6_init(void);
|
|
void ioam6_exit(void);
|
|
|
|
int ioam6_iptunnel_init(void);
|
|
void ioam6_iptunnel_exit(void);
|
|
|
|
#endif /* _NET_IOAM6_H */
|