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/ioam6_genl.h>
  16 #include <linux/rhashtable-types.h>
  17
  18 struct ioam6_namespace {
  19         struct rhash_head head;
  20         struct rcu_head rcu;
  21
  22         struct ioam6_schema __rcu *schema;
  23
  24         __be16 id;
  25         __be32 data;
  26         __be64 data_wide;
  27 };
  28
  29 struct ioam6_schema {
  30         struct rhash_head head;
  31         struct rcu_head rcu;
  32
  33         struct ioam6_namespace __rcu *ns;
  34
  35         u32 id;
  36         int len;
  37         __be32 hdr;
  38
  39         u8 data[];
  40 };
  41
  42 struct ioam6_pernet_data {
  43         struct mutex lock;
  44         struct rhashtable namespaces;
  45         struct rhashtable schemas;
  46 };
  47
  48 static inline struct ioam6_pernet_data *ioam6_pernet(struct net *net)
  49 {
  50 #if IS_ENABLED(CONFIG_IPV6)
  51         return net->ipv6.ioam6_data;
  52 #else
  53         return NULL;
  54 #endif
  55 }
  56
  57 struct ioam6_namespace *ioam6_namespace(struct net *net, __be16 id);
  58 void ioam6_fill_trace_data(struct sk_buff *skb,
  59                            struct ioam6_namespace *ns,
  60                            struct ioam6_trace_hdr *trace,
  61                            bool is_input);
  62
  63 int ioam6_init(void);
  64 void ioam6_exit(void);
  65
  66 int ioam6_iptunnel_init(void);
  67 void ioam6_iptunnel_exit(void);
  68
  69 void ioam6_event(enum ioam6_event_type type, struct net *net, gfp_t gfp,
  70                  void *opt, unsigned int opt_len);
  71
  72 #endif /* _NET_IOAM6_H */