1 // SPDX-License-Identifier: GPL-2.0
2 #include <net/genetlink.h>
3 #include <net/ila.h>
4 #include <net/netns/generic.h>
5 #include <uapi/linux/genetlink.h>
6 #include "ila.h"
7 
8 static const struct nla_policy ila_nl_policy[ILA_ATTR_MAX + 1] = {
9 	[ILA_ATTR_LOCATOR] = { .type = NLA_U64, },
10 	[ILA_ATTR_LOCATOR_MATCH] = { .type = NLA_U64, },
11 	[ILA_ATTR_IFINDEX] = { .type = NLA_U32, },
12 	[ILA_ATTR_CSUM_MODE] = { .type = NLA_U8, },
13 	[ILA_ATTR_IDENT_TYPE] = { .type = NLA_U8, },
14 };
15 
16 static const struct genl_ops ila_nl_ops[] = {
17 	{
18 		.cmd = ILA_CMD_ADD,
19 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
20 		.doit = ila_xlat_nl_cmd_add_mapping,
21 		.flags = GENL_ADMIN_PERM,
22 	},
23 	{
24 		.cmd = ILA_CMD_DEL,
25 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
26 		.doit = ila_xlat_nl_cmd_del_mapping,
27 		.flags = GENL_ADMIN_PERM,
28 	},
29 	{
30 		.cmd = ILA_CMD_FLUSH,
31 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
32 		.doit = ila_xlat_nl_cmd_flush,
33 		.flags = GENL_ADMIN_PERM,
34 	},
35 	{
36 		.cmd = ILA_CMD_GET,
37 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
38 		.doit = ila_xlat_nl_cmd_get_mapping,
39 		.start = ila_xlat_nl_dump_start,
40 		.dumpit = ila_xlat_nl_dump,
41 		.done = ila_xlat_nl_dump_done,
42 	},
43 };
44 
45 unsigned int ila_net_id;
46 
47 struct genl_family ila_nl_family __ro_after_init = {
48 	.hdrsize	= 0,
49 	.name		= ILA_GENL_NAME,
50 	.version	= ILA_GENL_VERSION,
51 	.maxattr	= ILA_ATTR_MAX,
52 	.policy = ila_nl_policy,
53 	.netnsok	= true,
54 	.parallel_ops	= true,
55 	.module		= THIS_MODULE,
56 	.ops		= ila_nl_ops,
57 	.n_ops		= ARRAY_SIZE(ila_nl_ops),
58 };
59 
ila_init_net(struct net * net)60 static __net_init int ila_init_net(struct net *net)
61 {
62 	int err;
63 
64 	err = ila_xlat_init_net(net);
65 	if (err)
66 		goto ila_xlat_init_fail;
67 
68 	return 0;
69 
70 ila_xlat_init_fail:
71 	return err;
72 }
73 
ila_exit_net(struct net * net)74 static __net_exit void ila_exit_net(struct net *net)
75 {
76 	ila_xlat_exit_net(net);
77 }
78 
79 static struct pernet_operations ila_net_ops = {
80 	.init = ila_init_net,
81 	.exit = ila_exit_net,
82 	.id   = &ila_net_id,
83 	.size = sizeof(struct ila_net),
84 };
85 
ila_init(void)86 static int __init ila_init(void)
87 {
88 	int ret;
89 
90 	ret = register_pernet_device(&ila_net_ops);
91 	if (ret)
92 		goto register_device_fail;
93 
94 	ret = genl_register_family(&ila_nl_family);
95 	if (ret)
96 		goto register_family_fail;
97 
98 	ret = ila_lwt_init();
99 	if (ret)
100 		goto fail_lwt;
101 
102 	return 0;
103 
104 fail_lwt:
105 	genl_unregister_family(&ila_nl_family);
106 register_family_fail:
107 	unregister_pernet_device(&ila_net_ops);
108 register_device_fail:
109 	return ret;
110 }
111 
ila_fini(void)112 static void __exit ila_fini(void)
113 {
114 	ila_lwt_fini();
115 	genl_unregister_family(&ila_nl_family);
116 	unregister_pernet_device(&ila_net_ops);
117 }
118 
119 module_init(ila_init);
120 module_exit(ila_fini);
121 MODULE_AUTHOR("Tom Herbert <tom@herbertland.com>");
122 MODULE_LICENSE("GPL");
123 MODULE_DESCRIPTION("IPv6: Identifier Locator Addressing (ILA)");
124