mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 12:14:01 +08:00
408fbc22ef
Sample use case of how this is encoded: user space via tuntap (or a connected VM/Machine/container) encodes the tcindex TLV. Sample use case of decoding: IFE action decodes it and the skb->tc_index is then used to classify. So something like this for encoded ICMP packets: .. first decode then reclassify... skb->tcindex will be set sudo $TC filter add dev $ETH parent ffff: prio 2 protocol 0xbeef \ u32 match u32 0 0 flowid 1:1 \ action ife decode reclassify ...next match the decode icmp packet... sudo $TC filter add dev $ETH parent ffff: prio 4 protocol ip \ u32 match ip protocol 1 0xff flowid 1:1 \ action continue ... last classify it using the tcindex classifier and do someaction.. sudo $TC filter add dev $ETH parent ffff: prio 5 protocol ip \ handle 0x11 tcindex classid 1:1 \ action blah.. Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/*
|
|
* net/sched/act_meta_tc_index.c IFE skb->tc_index 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 (2016)
|
|
*
|
|
*/
|
|
|
|
#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>
|
|
#include <linux/rtnetlink.h>
|
|
|
|
static int skbtcindex_encode(struct sk_buff *skb, void *skbdata,
|
|
struct tcf_meta_info *e)
|
|
{
|
|
u32 ifetc_index = skb->tc_index;
|
|
|
|
return ife_encode_meta_u16(ifetc_index, skbdata, e);
|
|
}
|
|
|
|
static int skbtcindex_decode(struct sk_buff *skb, void *data, u16 len)
|
|
{
|
|
u16 ifetc_index = *(u16 *)data;
|
|
|
|
skb->tc_index = ntohs(ifetc_index);
|
|
return 0;
|
|
}
|
|
|
|
static int skbtcindex_check(struct sk_buff *skb, struct tcf_meta_info *e)
|
|
{
|
|
return ife_check_meta_u16(skb->tc_index, e);
|
|
}
|
|
|
|
static struct tcf_meta_ops ife_skbtcindex_ops = {
|
|
.metaid = IFE_META_TCINDEX,
|
|
.metatype = NLA_U16,
|
|
.name = "tc_index",
|
|
.synopsis = "skb tc_index 16 bit metadata",
|
|
.check_presence = skbtcindex_check,
|
|
.encode = skbtcindex_encode,
|
|
.decode = skbtcindex_decode,
|
|
.get = ife_get_meta_u16,
|
|
.alloc = ife_alloc_meta_u16,
|
|
.release = ife_release_meta_gen,
|
|
.validate = ife_validate_meta_u16,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int __init ifetc_index_init_module(void)
|
|
{
|
|
return register_ife_op(&ife_skbtcindex_ops);
|
|
}
|
|
|
|
static void __exit ifetc_index_cleanup_module(void)
|
|
{
|
|
unregister_ife_op(&ife_skbtcindex_ops);
|
|
}
|
|
|
|
module_init(ifetc_index_init_module);
|
|
module_exit(ifetc_index_cleanup_module);
|
|
|
|
MODULE_AUTHOR("Jamal Hadi Salim(2016)");
|
|
MODULE_DESCRIPTION("Inter-FE skb tc_index metadata module");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_IFE_META(IFE_META_SKBTCINDEX);
|