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(metaval: ifetc_index, skbdata, mi: 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(metaval: skb->tc_index, mi: 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(mops: &ife_skbtcindex_ops); |
60 | } |
61 | |
62 | static void __exit ifetc_index_cleanup_module(void) |
63 | { |
64 | unregister_ife_op(mops: &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 | |