200e10f469
Example usage:
Set the skb priority using skbedit then allow it to be encoded
sudo tc qdisc add dev $ETH root handle 1: prio
sudo tc filter add dev $ETH parent 1: protocol ip prio 10 \
u32 match ip protocol 1 0xff flowid 1:2 \
action skbedit prio 17 \
action ife encode \
allow prio \
dst 02:15:15:15:15:15
Note: You dont need the skbedit action if you are already encoding the
skb priority earlier. A zero skb priority will not be sent
Alternative hard code static priority of decimal 33 (unlike skbedit)
then mark of 0x12 every time the filter matches
sudo $TC filter add dev $ETH parent 1: protocol ip prio 10 \
u32 match ip protocol 1 0xff flowid 1:2 \
action ife encode \
type 0xDEAD \
use prio 33 \
use mark 0x12 \
dst 02:15:15:15:15:15
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/*
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* net/sched/act_meta_prio.c IFE skb->priority metadata module
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* copyright Jamal Hadi Salim (2015)
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*
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/skbuff.h>
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#include <linux/rtnetlink.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <net/netlink.h>
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#include <net/pkt_sched.h>
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#include <uapi/linux/tc_act/tc_ife.h>
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#include <net/tc_act/tc_ife.h>
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static int skbprio_check(struct sk_buff *skb, struct tcf_meta_info *e)
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{
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return ife_check_meta_u32(skb->priority, e);
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}
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static int skbprio_encode(struct sk_buff *skb, void *skbdata,
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struct tcf_meta_info *e)
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{
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u32 ifeprio = skb->priority; /* avoid having to cast skb->priority*/
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return ife_encode_meta_u32(ifeprio, skbdata, e);
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}
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static int skbprio_decode(struct sk_buff *skb, void *data, u16 len)
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{
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u32 ifeprio = *(u32 *)data;
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skb->priority = ntohl(ifeprio);
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return 0;
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}
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static struct tcf_meta_ops ife_prio_ops = {
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.metaid = IFE_META_PRIO,
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.metatype = NLA_U32,
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.name = "skbprio",
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.synopsis = "skb prio metadata",
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.check_presence = skbprio_check,
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.encode = skbprio_encode,
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.decode = skbprio_decode,
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.get = ife_get_meta_u32,
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.alloc = ife_alloc_meta_u32,
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.owner = THIS_MODULE,
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};
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static int __init ifeprio_init_module(void)
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{
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return register_ife_op(&ife_prio_ops);
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}
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static void __exit ifeprio_cleanup_module(void)
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{
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unregister_ife_op(&ife_prio_ops);
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}
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module_init(ifeprio_init_module);
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module_exit(ifeprio_cleanup_module);
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MODULE_AUTHOR("Jamal Hadi Salim(2015)");
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MODULE_DESCRIPTION("Inter-FE skb prio metadata action");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_IFE_META(IFE_META_PRIO);
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