tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * net/sched/act_meta_prio.c IFE skb->priority 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 (2015)
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
26static int skbprio_check(struct sk_buff *skb, struct tcf_meta_info *e)
27{
28 return ife_check_meta_u32(skb->priority, e);
29}
30
31static int skbprio_encode(struct sk_buff *skb, void *skbdata,
32 struct tcf_meta_info *e)
33{
34 u32 ifeprio = skb->priority; /* avoid having to cast skb->priority*/
35
36 return ife_encode_meta_u32(ifeprio, skbdata, e);
37}
38
39static int skbprio_decode(struct sk_buff *skb, void *data, u16 len)
40{
41 u32 ifeprio = *(u32 *)data;
42
43 skb->priority = ntohl(ifeprio);
44 return 0;
45}
46
47static struct tcf_meta_ops ife_prio_ops = {
48 .metaid = IFE_META_PRIO,
49 .metatype = NLA_U32,
50 .name = "skbprio",
51 .synopsis = "skb prio metadata",
52 .check_presence = skbprio_check,
53 .encode = skbprio_encode,
54 .decode = skbprio_decode,
55 .get = ife_get_meta_u32,
56 .alloc = ife_alloc_meta_u32,
57 .owner = THIS_MODULE,
58};
59
60static int __init ifeprio_init_module(void)
61{
62 return register_ife_op(&ife_prio_ops);
63}
64
65static void __exit ifeprio_cleanup_module(void)
66{
67 unregister_ife_op(&ife_prio_ops);
68}
69
70module_init(ifeprio_init_module);
71module_exit(ifeprio_cleanup_module);
72
73MODULE_AUTHOR("Jamal Hadi Salim(2015)");
74MODULE_DESCRIPTION("Inter-FE skb prio metadata action");
75MODULE_LICENSE("GPL");
76MODULE_ALIAS_IFE_META("skbprio");