2 * net/sched/act_meta_tc_index.c IFE skb->tc_index metadata module
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.
9 * copyright Jamal Hadi Salim (2016)
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>
26 static int skbtcindex_encode(struct sk_buff *skb, void *skbdata,
27 struct tcf_meta_info *e)
29 u32 ifetc_index = skb->tc_index;
31 return ife_encode_meta_u16(ifetc_index, skbdata, e);
34 static int skbtcindex_decode(struct sk_buff *skb, void *data, u16 len)
36 u16 ifetc_index = *(u16 *)data;
38 skb->tc_index = ntohs(ifetc_index);
42 static int skbtcindex_check(struct sk_buff *skb, struct tcf_meta_info *e)
44 return ife_check_meta_u16(skb->tc_index, e);
47 static struct tcf_meta_ops ife_skbtcindex_ops = {
48 .metaid = IFE_META_TCINDEX,
51 .synopsis = "skb tc_index 16 bit metadata",
52 .check_presence = skbtcindex_check,
53 .encode = skbtcindex_encode,
54 .decode = skbtcindex_decode,
55 .get = ife_get_meta_u16,
56 .alloc = ife_alloc_meta_u16,
57 .release = ife_release_meta_gen,
58 .validate = ife_validate_meta_u16,
62 static int __init ifetc_index_init_module(void)
64 return register_ife_op(&ife_skbtcindex_ops);
67 static void __exit ifetc_index_cleanup_module(void)
69 unregister_ife_op(&ife_skbtcindex_ops);
72 module_init(ifetc_index_init_module);
73 module_exit(ifetc_index_cleanup_module);
75 MODULE_AUTHOR("Jamal Hadi Salim(2016)");
76 MODULE_DESCRIPTION("Inter-FE skb tc_index metadata module");
77 MODULE_LICENSE("GPL");
78 MODULE_ALIAS_IFE_META("tcindex");