Commit 200e10f4 authored by Jamal Hadi Salim's avatar Jamal Hadi Salim Committed by David S. Miller

Support to encoding decoding skb prio on IFE action

    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 $ETH parent 1: protocol ip prio 10 \
    u32 match ip protocol 1 0xff flowid 1:2 \
    action ife encode \
    type 0xDEAD \
    use prio 33 \
    use mark 0x12 \
    dst 02:15:15:15:15:15
Signed-off-by: default avatarJamal Hadi Salim <>
Acked-by: default avatarCong Wang <>
Signed-off-by: default avatarDavid S. Miller <>
parent 084e2f65
......@@ -756,6 +756,11 @@ config NET_IFE_SKBMARK
depends on NET_ACT_IFE
tristate "Support to encoding decoding skb prio on IFE action"
depends on NET_ACT_IFE
config NET_CLS_IND
bool "Incoming device classification"
depends on NET_CLS_U32 || NET_CLS_FW
......@@ -21,6 +21,7 @@ obj-$(CONFIG_NET_ACT_BPF) += act_bpf.o
obj-$(CONFIG_NET_ACT_CONNMARK) += act_connmark.o
obj-$(CONFIG_NET_ACT_IFE) += act_ife.o
obj-$(CONFIG_NET_IFE_SKBMARK) += act_meta_mark.o
obj-$(CONFIG_NET_IFE_SKBPRIO) += act_meta_skbprio.o
obj-$(CONFIG_NET_SCH_FIFO) += sch_fifo.o
obj-$(CONFIG_NET_SCH_CBQ) += sch_cbq.o
obj-$(CONFIG_NET_SCH_HTB) += sch_htb.o
* net/sched/act_meta_prio.c IFE skb->priority metadata module
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
* copyright Jamal Hadi Salim (2015)
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/module.h>
#include <linux/init.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <uapi/linux/tc_act/tc_ife.h>
#include <net/tc_act/tc_ife.h>
static int skbprio_check(struct sk_buff *skb, struct tcf_meta_info *e)
return ife_check_meta_u32(skb->priority, e);
static int skbprio_encode(struct sk_buff *skb, void *skbdata,
struct tcf_meta_info *e)
u32 ifeprio = skb->priority; /* avoid having to cast skb->priority*/
return ife_encode_meta_u32(ifeprio, skbdata, e);
static int skbprio_decode(struct sk_buff *skb, void *data, u16 len)
u32 ifeprio = *(u32 *)data;
skb->priority = ntohl(ifeprio);
return 0;
static struct tcf_meta_ops ife_prio_ops = {
.metaid = IFE_META_PRIO,
.metatype = NLA_U32,
.name = "skbprio",
.synopsis = "skb prio metadata",
.check_presence = skbprio_check,
.encode = skbprio_encode,
.decode = skbprio_decode,
.get = ife_get_meta_u32,
.alloc = ife_alloc_meta_u32,
.owner = THIS_MODULE,
static int __init ifeprio_init_module(void)
return register_ife_op(&ife_prio_ops);
static void __exit ifeprio_cleanup_module(void)
MODULE_AUTHOR("Jamal Hadi Salim(2015)");
MODULE_DESCRIPTION("Inter-FE skb prio metadata action");
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