ila_main.c

  1// SPDX-License-Identifier: GPL-2.0
  2#include <net/genetlink.h>
  3#include <net/netns/generic.h>
  4#include <uapi/linux/genetlink.h>
  5#include "ila.h"
  6
  7static const struct nla_policy ila_nl_policy[ILA_ATTR_MAX + 1] = {
  8	[ILA_ATTR_LOCATOR] = { .type = NLA_U64, },
  9	[ILA_ATTR_LOCATOR_MATCH] = { .type = NLA_U64, },
 10	[ILA_ATTR_IFINDEX] = { .type = NLA_U32, },
 11	[ILA_ATTR_CSUM_MODE] = { .type = NLA_U8, },
 12	[ILA_ATTR_IDENT_TYPE] = { .type = NLA_U8, },
 13};
 14
 15static const struct genl_ops ila_nl_ops[] = {
 16	{
 17		.cmd = ILA_CMD_ADD,
 18		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 19		.doit = ila_xlat_nl_cmd_add_mapping,
 20		.flags = GENL_ADMIN_PERM,
 21	},
 22	{
 23		.cmd = ILA_CMD_DEL,
 24		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 25		.doit = ila_xlat_nl_cmd_del_mapping,
 26		.flags = GENL_ADMIN_PERM,
 27	},
 28	{
 29		.cmd = ILA_CMD_FLUSH,
 30		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 31		.doit = ila_xlat_nl_cmd_flush,
 32		.flags = GENL_ADMIN_PERM,
 33	},
 34	{
 35		.cmd = ILA_CMD_GET,
 36		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 37		.doit = ila_xlat_nl_cmd_get_mapping,
 38		.start = ila_xlat_nl_dump_start,
 39		.dumpit = ila_xlat_nl_dump,
 40		.done = ila_xlat_nl_dump_done,
 41	},
 42};
 43
 44unsigned int ila_net_id;
 45
 46struct genl_family ila_nl_family __ro_after_init = {
 47	.hdrsize	= 0,
 48	.name		= ILA_GENL_NAME,
 49	.version	= ILA_GENL_VERSION,
 50	.maxattr	= ILA_ATTR_MAX,
 51	.policy = ila_nl_policy,
 52	.netnsok	= true,
 53	.parallel_ops	= true,
 54	.module		= THIS_MODULE,
 55	.ops		= ila_nl_ops,
 56	.n_ops		= ARRAY_SIZE(ila_nl_ops),
 57	.resv_start_op	= ILA_CMD_FLUSH + 1,
 58};
 59
 60static __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
 70ila_xlat_init_fail:
 71	return err;
 72}
 73
 74static __net_exit void ila_pre_exit_net(struct net *net)
 75{
 76	ila_xlat_pre_exit_net(net);
 77}
 78
 79static __net_exit void ila_exit_net(struct net *net)
 80{
 81	ila_xlat_exit_net(net);
 82}
 83
 84static struct pernet_operations ila_net_ops = {
 85	.init = ila_init_net,
 86	.pre_exit = ila_pre_exit_net,
 87	.exit = ila_exit_net,
 88	.id   = &ila_net_id,
 89	.size = sizeof(struct ila_net),
 90};
 91
 92static int __init ila_init(void)
 93{
 94	int ret;
 95
 96	ret = register_pernet_device(&ila_net_ops);
 97	if (ret)
 98		goto register_device_fail;
 99
100	ret = genl_register_family(&ila_nl_family);
101	if (ret)
102		goto register_family_fail;
103
104	ret = ila_lwt_init();
105	if (ret)
106		goto fail_lwt;
107
108	return 0;
109
110fail_lwt:
111	genl_unregister_family(&ila_nl_family);
112register_family_fail:
113	unregister_pernet_device(&ila_net_ops);
114register_device_fail:
115	return ret;
116}
117
118static void __exit ila_fini(void)
119{
120	ila_lwt_fini();
121	genl_unregister_family(&ila_nl_family);
122	unregister_pernet_device(&ila_net_ops);
123}
124
125module_init(ila_init);
126module_exit(ila_fini);
127MODULE_AUTHOR("Tom Herbert <tom@herbertland.com>");
128MODULE_LICENSE("GPL");
129MODULE_DESCRIPTION("IPv6: Identifier Locator Addressing (ILA)");