1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * IPv6 IOAM implementation 4 * 5 * Author: 6 * Justin Iurman <justin.iurman@uliege.be> 7 */ 8 9 #ifndef _NET_IOAM6_H 10 #define _NET_IOAM6_H 11 12 #include <linux/net.h> 13 #include <linux/ipv6.h> 14 #include <linux/ioam6.h> 15 #include <linux/rhashtable-types.h> 16 17 struct ioam6_namespace { 18 struct rhash_head head; 19 struct rcu_head rcu; 20 21 struct ioam6_schema __rcu *schema; 22 23 __be16 id; 24 __be32 data; 25 __be64 data_wide; 26 }; 27 28 struct ioam6_schema { 29 struct rhash_head head; 30 struct rcu_head rcu; 31 32 struct ioam6_namespace __rcu *ns; 33 34 u32 id; 35 int len; 36 __be32 hdr; 37 38 u8 data[0]; 39 }; 40 41 struct ioam6_pernet_data { 42 struct mutex lock; 43 struct rhashtable namespaces; 44 struct rhashtable schemas; 45 }; 46 47 static inline struct ioam6_pernet_data *ioam6_pernet(struct net *net) 48 { 49 #if IS_ENABLED(CONFIG_IPV6) 50 return net->ipv6.ioam6_data; 51 #else 52 return NULL; 53 #endif 54 } 55 56 struct ioam6_namespace *ioam6_namespace(struct net *net, __be16 id); 57 void ioam6_fill_trace_data(struct sk_buff *skb, 58 struct ioam6_namespace *ns, 59 struct ioam6_trace_hdr *trace, 60 bool is_input); 61 62 int ioam6_init(void); 63 void ioam6_exit(void); 64 65 int ioam6_iptunnel_init(void); 66 void ioam6_iptunnel_exit(void); 67 68 #endif /* _NET_IOAM6_H */ 69