084e2f6566
Example usage: Set the skb 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 mark 17 \ action ife encode \ allow mark \ dst 02:15:15:15:15:15 Note: You dont need the skbedit action if you are already encoding the skb mark earlier. A zero skb mark, when seen, will not be encoded. Alternative hard code static 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 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>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/*
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* net/sched/act_meta_mark.c IFE skb->mark 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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#include <linux/rtnetlink.h>
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static int skbmark_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 ifemark = skb->mark;
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return ife_encode_meta_u32(ifemark, skbdata, e);
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}
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static int skbmark_decode(struct sk_buff *skb, void *data, u16 len)
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{
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u32 ifemark = *(u32 *)data;
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skb->mark = ntohl(ifemark);
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return 0;
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}
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static int skbmark_check(struct sk_buff *skb, struct tcf_meta_info *e)
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{
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return ife_check_meta_u32(skb->mark, e);
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}
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static struct tcf_meta_ops ife_skbmark_ops = {
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.metaid = IFE_META_SKBMARK,
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.metatype = NLA_U32,
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.name = "skbmark",
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.synopsis = "skb mark 32 bit metadata",
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.check_presence = skbmark_check,
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.encode = skbmark_encode,
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.decode = skbmark_decode,
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.get = ife_get_meta_u32,
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.alloc = ife_alloc_meta_u32,
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.release = ife_release_meta_gen,
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.validate = ife_validate_meta_u32,
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.owner = THIS_MODULE,
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};
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static int __init ifemark_init_module(void)
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{
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return register_ife_op(&ife_skbmark_ops);
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}
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static void __exit ifemark_cleanup_module(void)
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{
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unregister_ife_op(&ife_skbmark_ops);
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}
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module_init(ifemark_init_module);
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module_exit(ifemark_cleanup_module);
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MODULE_AUTHOR("Jamal Hadi Salim(2015)");
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MODULE_DESCRIPTION("Inter-FE skb mark metadata module");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_IFE_META(IFE_META_SKBMARK);
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