1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/sched/act_meta_tc_index.c IFE skb->tc_index metadata module
4 *
5 * copyright Jamal Hadi Salim (2016)
6 */
7
8 #include <linux/types.h>
9 #include <linux/kernel.h>
10 #include <linux/string.h>
11 #include <linux/errno.h>
12 #include <linux/skbuff.h>
13 #include <linux/rtnetlink.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <net/netlink.h>
17 #include <net/pkt_sched.h>
18 #include <uapi/linux/tc_act/tc_ife.h>
19 #include <net/tc_act/tc_ife.h>
20
21 static int skbtcindex_encode(struct sk_buff *skb, void *skbdata,
22 struct tcf_meta_info *e)
23 {
24 u32 ifetc_index = skb->tc_index;
25
26 return ife_encode_meta_u16(ifetc_index, skbdata, e);
27 }
28
29 static int skbtcindex_decode(struct sk_buff *skb, void *data, u16 len)
30 {
31 u16 ifetc_index = *(u16 *)data;
32
33 skb->tc_index = ntohs(ifetc_index);
34 return 0;
35 }
36
37 static int skbtcindex_check(struct sk_buff *skb, struct tcf_meta_info *e)
38 {
39 return ife_check_meta_u16(skb->tc_index, e);
40 }
41
42 static struct tcf_meta_ops ife_skbtcindex_ops = {
43 .metaid = IFE_META_TCINDEX,
44 .metatype = NLA_U16,
45 .name = "tc_index",
46 .synopsis = "skb tc_index 16 bit metadata",
47 .check_presence = skbtcindex_check,
48 .encode = skbtcindex_encode,
49 .decode = skbtcindex_decode,
50 .get = ife_get_meta_u16,
51 .alloc = ife_alloc_meta_u16,
52 .release = ife_release_meta_gen,
53 .validate = ife_validate_meta_u16,
54 .owner = THIS_MODULE,
55 };
56
57 static int __init ifetc_index_init_module(void)
58 {
59 return register_ife_op(&ife_skbtcindex_ops);
60 }
61
62 static void __exit ifetc_index_cleanup_module(void)
63 {
64 unregister_ife_op(&ife_skbtcindex_ops);
65 }
66
67 module_init(ifetc_index_init_module);
68 module_exit(ifetc_index_cleanup_module);
69
70 MODULE_AUTHOR("Jamal Hadi Salim(2016)");
71 MODULE_DESCRIPTION("Inter-FE skb tc_index metadata module");
72 MODULE_LICENSE("GPL");
73 MODULE_ALIAS_IFE_META("tcindex");
74
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