1/*
 2 * net/sched/act_meta_tc_index.c IFE skb->tc_index metadata module
 3 *
 4 *		This program is free software; you can redistribute it and/or
 5 *		modify it under the terms of the GNU General Public License
 6 *		as published by the Free Software Foundation; either version
 7 *		2 of the License, or (at your option) any later version.
 8 *
 9 * copyright Jamal Hadi Salim (2016)
10 *
11*/
12
13#include <linux/types.h>
14#include <linux/kernel.h>
15#include <linux/string.h>
16#include <linux/errno.h>
17#include <linux/skbuff.h>
18#include <linux/rtnetlink.h>
19#include <linux/module.h>
20#include <linux/init.h>
21#include <net/netlink.h>
22#include <net/pkt_sched.h>
23#include <uapi/linux/tc_act/tc_ife.h>
24#include <net/tc_act/tc_ife.h>
25#include <linux/rtnetlink.h>
26
27static int skbtcindex_encode(struct sk_buff *skb, void *skbdata,
28			     struct tcf_meta_info *e)
29{
30	u32 ifetc_index = skb->tc_index;
31
32	return ife_encode_meta_u16(ifetc_index, skbdata, e);
33}
34
35static int skbtcindex_decode(struct sk_buff *skb, void *data, u16 len)
36{
37	u16 ifetc_index = *(u16 *)data;
38
39	skb->tc_index = ntohs(ifetc_index);
40	return 0;
41}
42
43static int skbtcindex_check(struct sk_buff *skb, struct tcf_meta_info *e)
44{
45	return ife_check_meta_u16(skb->tc_index, e);
46}
47
48static struct tcf_meta_ops ife_skbtcindex_ops = {
49	.metaid = IFE_META_TCINDEX,
50	.metatype = NLA_U16,
51	.name = "tc_index",
52	.synopsis = "skb tc_index 16 bit metadata",
53	.check_presence = skbtcindex_check,
54	.encode = skbtcindex_encode,
55	.decode = skbtcindex_decode,
56	.get = ife_get_meta_u16,
57	.alloc = ife_alloc_meta_u16,
58	.release = ife_release_meta_gen,
59	.validate = ife_validate_meta_u16,
60	.owner = THIS_MODULE,
61};
62
63static int __init ifetc_index_init_module(void)
64{
65	return register_ife_op(&ife_skbtcindex_ops);
66}
67
68static void __exit ifetc_index_cleanup_module(void)
69{
70	unregister_ife_op(&ife_skbtcindex_ops);
71}
72
73module_init(ifetc_index_init_module);
74module_exit(ifetc_index_cleanup_module);
75
76MODULE_AUTHOR("Jamal Hadi Salim(2016)");
77MODULE_DESCRIPTION("Inter-FE skb tc_index metadata module");
78MODULE_LICENSE("GPL");
79MODULE_ALIAS_IFE_META(IFE_META_SKBTCINDEX);