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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
408fbc22 JHS |
2 | /* |
3 | * net/sched/act_meta_tc_index.c IFE skb->tc_index metadata module | |
4 | * | |
408fbc22 | 5 | * copyright Jamal Hadi Salim (2016) |
408fbc22 JHS |
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> | |
408fbc22 JHS |
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"); | |
8f047480 | 73 | MODULE_ALIAS_IFE_META("tcindex"); |