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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
200e10f4 JHS |
2 | /* |
3 | * net/sched/act_meta_prio.c IFE skb->priority metadata module | |
4 | * | |
200e10f4 | 5 | * copyright Jamal Hadi Salim (2015) |
200e10f4 JHS |
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 | ||
21 | static int skbprio_check(struct sk_buff *skb, struct tcf_meta_info *e) | |
22 | { | |
23 | return ife_check_meta_u32(skb->priority, e); | |
24 | } | |
25 | ||
26 | static int skbprio_encode(struct sk_buff *skb, void *skbdata, | |
27 | struct tcf_meta_info *e) | |
28 | { | |
29 | u32 ifeprio = skb->priority; /* avoid having to cast skb->priority*/ | |
30 | ||
31 | return ife_encode_meta_u32(ifeprio, skbdata, e); | |
32 | } | |
33 | ||
34 | static int skbprio_decode(struct sk_buff *skb, void *data, u16 len) | |
35 | { | |
36 | u32 ifeprio = *(u32 *)data; | |
37 | ||
38 | skb->priority = ntohl(ifeprio); | |
39 | return 0; | |
40 | } | |
41 | ||
42 | static struct tcf_meta_ops ife_prio_ops = { | |
43 | .metaid = IFE_META_PRIO, | |
44 | .metatype = NLA_U32, | |
45 | .name = "skbprio", | |
46 | .synopsis = "skb prio metadata", | |
47 | .check_presence = skbprio_check, | |
48 | .encode = skbprio_encode, | |
49 | .decode = skbprio_decode, | |
50 | .get = ife_get_meta_u32, | |
51 | .alloc = ife_alloc_meta_u32, | |
52 | .owner = THIS_MODULE, | |
53 | }; | |
54 | ||
55 | static int __init ifeprio_init_module(void) | |
56 | { | |
57 | return register_ife_op(&ife_prio_ops); | |
58 | } | |
59 | ||
60 | static void __exit ifeprio_cleanup_module(void) | |
61 | { | |
62 | unregister_ife_op(&ife_prio_ops); | |
63 | } | |
64 | ||
65 | module_init(ifeprio_init_module); | |
66 | module_exit(ifeprio_cleanup_module); | |
67 | ||
68 | MODULE_AUTHOR("Jamal Hadi Salim(2015)"); | |
69 | MODULE_DESCRIPTION("Inter-FE skb prio metadata action"); | |
70 | MODULE_LICENSE("GPL"); | |
8f047480 | 71 | MODULE_ALIAS_IFE_META("skbprio"); |