xref: /openbmc/linux/net/sched/act_meta_mark.c (revision 2874c5fd)
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