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408fbc22 JHS |
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 | ||
27 | static 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 | ||
35 | static 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 | ||
43 | static 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 | ||
48 | static 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 | ||
63 | static int __init ifetc_index_init_module(void) | |
64 | { | |
65 | return register_ife_op(&ife_skbtcindex_ops); | |
66 | } | |
67 | ||
68 | static void __exit ifetc_index_cleanup_module(void) | |
69 | { | |
70 | unregister_ife_op(&ife_skbtcindex_ops); | |
71 | } | |
72 | ||
73 | module_init(ifetc_index_init_module); | |
74 | module_exit(ifetc_index_cleanup_module); | |
75 | ||
76 | MODULE_AUTHOR("Jamal Hadi Salim(2016)"); | |
77 | MODULE_DESCRIPTION("Inter-FE skb tc_index metadata module"); | |
78 | MODULE_LICENSE("GPL"); | |
79 | MODULE_ALIAS_IFE_META(IFE_META_SKBTCINDEX); |