1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * net/sched/act_meta_prio.c IFE skb->priority metadata module
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * copyright Jamal Hadi Salim (2015)
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/types.h>
9*4882a593Smuzhiyun #include <linux/kernel.h>
10*4882a593Smuzhiyun #include <linux/string.h>
11*4882a593Smuzhiyun #include <linux/errno.h>
12*4882a593Smuzhiyun #include <linux/skbuff.h>
13*4882a593Smuzhiyun #include <linux/rtnetlink.h>
14*4882a593Smuzhiyun #include <linux/module.h>
15*4882a593Smuzhiyun #include <linux/init.h>
16*4882a593Smuzhiyun #include <net/netlink.h>
17*4882a593Smuzhiyun #include <net/pkt_sched.h>
18*4882a593Smuzhiyun #include <uapi/linux/tc_act/tc_ife.h>
19*4882a593Smuzhiyun #include <net/tc_act/tc_ife.h>
20*4882a593Smuzhiyun
skbprio_check(struct sk_buff * skb,struct tcf_meta_info * e)21*4882a593Smuzhiyun static int skbprio_check(struct sk_buff *skb, struct tcf_meta_info *e)
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun return ife_check_meta_u32(skb->priority, e);
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun
skbprio_encode(struct sk_buff * skb,void * skbdata,struct tcf_meta_info * e)26*4882a593Smuzhiyun static int skbprio_encode(struct sk_buff *skb, void *skbdata,
27*4882a593Smuzhiyun struct tcf_meta_info *e)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun u32 ifeprio = skb->priority; /* avoid having to cast skb->priority*/
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun return ife_encode_meta_u32(ifeprio, skbdata, e);
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
skbprio_decode(struct sk_buff * skb,void * data,u16 len)34*4882a593Smuzhiyun static int skbprio_decode(struct sk_buff *skb, void *data, u16 len)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun u32 ifeprio = *(u32 *)data;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun skb->priority = ntohl(ifeprio);
39*4882a593Smuzhiyun return 0;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun static struct tcf_meta_ops ife_prio_ops = {
43*4882a593Smuzhiyun .metaid = IFE_META_PRIO,
44*4882a593Smuzhiyun .metatype = NLA_U32,
45*4882a593Smuzhiyun .name = "skbprio",
46*4882a593Smuzhiyun .synopsis = "skb prio metadata",
47*4882a593Smuzhiyun .check_presence = skbprio_check,
48*4882a593Smuzhiyun .encode = skbprio_encode,
49*4882a593Smuzhiyun .decode = skbprio_decode,
50*4882a593Smuzhiyun .get = ife_get_meta_u32,
51*4882a593Smuzhiyun .alloc = ife_alloc_meta_u32,
52*4882a593Smuzhiyun .owner = THIS_MODULE,
53*4882a593Smuzhiyun };
54*4882a593Smuzhiyun
ifeprio_init_module(void)55*4882a593Smuzhiyun static int __init ifeprio_init_module(void)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun return register_ife_op(&ife_prio_ops);
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
ifeprio_cleanup_module(void)60*4882a593Smuzhiyun static void __exit ifeprio_cleanup_module(void)
61*4882a593Smuzhiyun {
62*4882a593Smuzhiyun unregister_ife_op(&ife_prio_ops);
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun module_init(ifeprio_init_module);
66*4882a593Smuzhiyun module_exit(ifeprio_cleanup_module);
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun MODULE_AUTHOR("Jamal Hadi Salim(2015)");
69*4882a593Smuzhiyun MODULE_DESCRIPTION("Inter-FE skb prio metadata action");
70*4882a593Smuzhiyun MODULE_LICENSE("GPL");
71*4882a593Smuzhiyun MODULE_ALIAS_IFE_META("skbprio");
72