include/net/ioam6.h

   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
  61 int ioam6_init(void);
  62 void ioam6_exit(void);
  63
  64 #endif /* _NET_IOAM6_H */