1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * net/sched/act_meta_prio.c IFE skb->priority 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 | |
21 | static int skbprio_check(struct sk_buff *skb, struct tcf_meta_info *e) |
22 | { |
23 | return ife_check_meta_u32(metaval: skb->priority, mi: 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(metaval: ifeprio, skbdata, mi: 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(mops: &ife_prio_ops); |
58 | } |
59 | |
60 | static void __exit ifeprio_cleanup_module(void) |
61 | { |
62 | unregister_ife_op(mops: &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" ); |
71 | MODULE_ALIAS_IFE_META("skbprio" ); |
72 | |