This source file includes following definitions.
- inet_add_protocol
- inet_add_offload
- inet_del_protocol
- inet_del_offload
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21 #include <linux/cache.h>
22 #include <linux/module.h>
23 #include <linux/netdevice.h>
24 #include <linux/spinlock.h>
25 #include <net/protocol.h>
26
27 struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS] __read_mostly;
28 EXPORT_SYMBOL(inet_protos);
29 const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS] __read_mostly;
30 EXPORT_SYMBOL(inet_offloads);
31
32 int inet_add_protocol(const struct net_protocol *prot, unsigned char protocol)
33 {
34 if (!prot->netns_ok) {
35 pr_err("Protocol %u is not namespace aware, cannot register.\n",
36 protocol);
37 return -EINVAL;
38 }
39
40 return !cmpxchg((const struct net_protocol **)&inet_protos[protocol],
41 NULL, prot) ? 0 : -1;
42 }
43 EXPORT_SYMBOL(inet_add_protocol);
44
45 int inet_add_offload(const struct net_offload *prot, unsigned char protocol)
46 {
47 return !cmpxchg((const struct net_offload **)&inet_offloads[protocol],
48 NULL, prot) ? 0 : -1;
49 }
50 EXPORT_SYMBOL(inet_add_offload);
51
52 int inet_del_protocol(const struct net_protocol *prot, unsigned char protocol)
53 {
54 int ret;
55
56 ret = (cmpxchg((const struct net_protocol **)&inet_protos[protocol],
57 prot, NULL) == prot) ? 0 : -1;
58
59 synchronize_net();
60
61 return ret;
62 }
63 EXPORT_SYMBOL(inet_del_protocol);
64
65 int inet_del_offload(const struct net_offload *prot, unsigned char protocol)
66 {
67 int ret;
68
69 ret = (cmpxchg((const struct net_offload **)&inet_offloads[protocol],
70 prot, NULL) == prot) ? 0 : -1;
71
72 synchronize_net();
73
74 return ret;
75 }
76 EXPORT_SYMBOL(inet_del_offload);