1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/sched/act_meta_mark.c IFE skb->mark metadata module
4 *
5 * copyright Jamal Hadi Salim (2015)
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
skbmark_encode(struct sk_buff * skb,void * skbdata,struct tcf_meta_info * e)21 static int skbmark_encode(struct sk_buff *skb, void *skbdata,
22 struct tcf_meta_info *e)
23 {
24 u32 ifemark = skb->mark;
25
26 return ife_encode_meta_u32(ifemark, skbdata, e);
27 }
28
skbmark_decode(struct sk_buff * skb,void * data,u16 len)29 static int skbmark_decode(struct sk_buff *skb, void *data, u16 len)
30 {
31 u32 ifemark = *(u32 *)data;
32
33 skb->mark = ntohl(ifemark);
34 return 0;
35 }
36
skbmark_check(struct sk_buff * skb,struct tcf_meta_info * e)37 static int skbmark_check(struct sk_buff *skb, struct tcf_meta_info *e)
38 {
39 return ife_check_meta_u32(skb->mark, e);
40 }
41
42 static struct tcf_meta_ops ife_skbmark_ops = {
43 .metaid = IFE_META_SKBMARK,
44 .metatype = NLA_U32,
45 .name = "skbmark",
46 .synopsis = "skb mark 32 bit metadata",
47 .check_presence = skbmark_check,
48 .encode = skbmark_encode,
49 .decode = skbmark_decode,
50 .get = ife_get_meta_u32,
51 .alloc = ife_alloc_meta_u32,
52 .release = ife_release_meta_gen,
53 .validate = ife_validate_meta_u32,
54 .owner = THIS_MODULE,
55 };
56
ifemark_init_module(void)57 static int __init ifemark_init_module(void)
58 {
59 return register_ife_op(&ife_skbmark_ops);
60 }
61
ifemark_cleanup_module(void)62 static void __exit ifemark_cleanup_module(void)
63 {
64 unregister_ife_op(&ife_skbmark_ops);
65 }
66
67 module_init(ifemark_init_module);
68 module_exit(ifemark_cleanup_module);
69
70 MODULE_AUTHOR("Jamal Hadi Salim(2015)");
71 MODULE_DESCRIPTION("Inter-FE skb mark metadata module");
72 MODULE_LICENSE("GPL");
73 MODULE_ALIAS_IFE_META("skbmark");
74