mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
7785bba299
This patch adds GRO ifrastructure and callbacks for ESP on
ipv4 and ipv6.
In case the GRO layer detects an ESP packet, the
esp{4,6}_gro_receive() function does a xfrm state lookup
and calls the xfrm input layer if it finds a matching state.
The packet will be decapsulated and reinjected it into layer 2.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
/*
|
|
* IPV4 GSO/GRO offload support
|
|
* Linux INET implementation
|
|
*
|
|
* Copyright (C) 2016 secunet Security Networks AG
|
|
* Author: Steffen Klassert <steffen.klassert@secunet.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* ESP GRO support
|
|
*/
|
|
|
|
#include <linux/skbuff.h>
|
|
#include <linux/init.h>
|
|
#include <net/protocol.h>
|
|
#include <crypto/aead.h>
|
|
#include <crypto/authenc.h>
|
|
#include <linux/err.h>
|
|
#include <linux/module.h>
|
|
#include <net/ip.h>
|
|
#include <net/xfrm.h>
|
|
#include <net/esp.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <net/udp.h>
|
|
|
|
static struct sk_buff **esp4_gro_receive(struct sk_buff **head,
|
|
struct sk_buff *skb)
|
|
{
|
|
int offset = skb_gro_offset(skb);
|
|
struct xfrm_offload *xo;
|
|
struct xfrm_state *x;
|
|
__be32 seq;
|
|
__be32 spi;
|
|
int err;
|
|
|
|
skb_pull(skb, offset);
|
|
|
|
if ((err = xfrm_parse_spi(skb, IPPROTO_ESP, &spi, &seq)) != 0)
|
|
goto out;
|
|
|
|
err = secpath_set(skb);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (skb->sp->len == XFRM_MAX_DEPTH)
|
|
goto out;
|
|
|
|
x = xfrm_state_lookup(dev_net(skb->dev), skb->mark,
|
|
(xfrm_address_t *)&ip_hdr(skb)->daddr,
|
|
spi, IPPROTO_ESP, AF_INET);
|
|
if (!x)
|
|
goto out;
|
|
|
|
skb->sp->xvec[skb->sp->len++] = x;
|
|
skb->sp->olen++;
|
|
|
|
xo = xfrm_offload(skb);
|
|
if (!xo) {
|
|
xfrm_state_put(x);
|
|
goto out;
|
|
}
|
|
xo->flags |= XFRM_GRO;
|
|
|
|
XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
|
|
XFRM_SPI_SKB_CB(skb)->family = AF_INET;
|
|
XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
|
|
XFRM_SPI_SKB_CB(skb)->seq = seq;
|
|
|
|
/* We don't need to handle errors from xfrm_input, it does all
|
|
* the error handling and frees the resources on error. */
|
|
xfrm_input(skb, IPPROTO_ESP, spi, -2);
|
|
|
|
return ERR_PTR(-EINPROGRESS);
|
|
out:
|
|
skb_push(skb, offset);
|
|
NAPI_GRO_CB(skb)->same_flow = 0;
|
|
NAPI_GRO_CB(skb)->flush = 1;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static const struct net_offload esp4_offload = {
|
|
.callbacks = {
|
|
.gro_receive = esp4_gro_receive,
|
|
},
|
|
};
|
|
|
|
static int __init esp4_offload_init(void)
|
|
{
|
|
return inet_add_offload(&esp4_offload, IPPROTO_ESP);
|
|
}
|
|
|
|
static void __exit esp4_offload_exit(void)
|
|
{
|
|
inet_del_offload(&esp4_offload, IPPROTO_ESP);
|
|
}
|
|
|
|
module_init(esp4_offload_init);
|
|
module_exit(esp4_offload_exit);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
|