Release 4.14 net/xfrm/xfrm_device.c
/*
* xfrm_device.c - IPsec device offloading code.
*
* Copyright (c) 2015 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 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.
*/
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <net/dst.h>
#include <net/xfrm.h>
#include <linux/notifier.h>
#ifdef CONFIG_XFRM_OFFLOAD
int validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features)
{
int err;
struct xfrm_state *x;
struct xfrm_offload *xo = xfrm_offload(skb);
if (skb_is_gso(skb))
return 0;
if (xo) {
x = skb->sp->xvec[skb->sp->len - 1];
if (xo->flags & XFRM_GRO || x->xso.flags & XFRM_OFFLOAD_INBOUND)
return 0;
x->outer_mode->xmit(x, skb);
err = x->type_offload->xmit(x, skb, features);
if (err) {
XFRM_INC_STATS(xs_net(x), LINUX_MIB_XFRMOUTSTATEPROTOERROR);
return err;
}
skb_push(skb, skb->data - skb_mac_header(skb));
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 145 | 100.00% | 1 | 100.00% |
Total | 145 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(validate_xmit_xfrm);
int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
struct xfrm_user_offload *xuo)
{
int err;
struct dst_entry *dst;
struct net_device *dev;
struct xfrm_state_offload *xso = &x->xso;
xfrm_address_t *saddr;
xfrm_address_t *daddr;
if (!x->type_offload)
return -EINVAL;
/* We don't yet support UDP encapsulation, TFC padding and ESN. */
if (x->encap || x->tfcpad || (x->props.flags & XFRM_STATE_ESN))
return 0;
dev = dev_get_by_index(net, xuo->ifindex);
if (!dev) {
if (!(xuo->flags & XFRM_OFFLOAD_INBOUND)) {
saddr = &x->props.saddr;
daddr = &x->id.daddr;
} else {
saddr = &x->id.daddr;
daddr = &x->props.saddr;
}
dst = __xfrm_dst_lookup(net, 0, 0, saddr, daddr,
x->props.family, x->props.output_mark);
if (IS_ERR(dst))
return 0;
dev = dst->dev;
dev_hold(dev);
dst_release(dst);
}
if (!dev->xfrmdev_ops || !dev->xfrmdev_ops->xdo_dev_state_add) {
xso->dev = NULL;
dev_put(dev);
return 0;
}
xso->dev = dev;
xso->num_exthdrs = 1;
xso->flags = xuo->flags;
err = dev->xfrmdev_ops->xdo_dev_state_add(x);
if (err) {
dev_put(dev);
return err;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 279 | 97.21% | 2 | 50.00% |
Lorenzo Colitti | 6 | 2.09% | 1 | 25.00% |
Ilan Tayari | 2 | 0.70% | 1 | 25.00% |
Total | 287 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(xfrm_dev_state_add);
bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
{
int mtu;
struct dst_entry *dst = skb_dst(skb);
struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
struct net_device *dev = x->xso.dev;
if (!x->type_offload || x->encap)
return false;
if ((x->xso.offload_handle && (dev == dst->path->dev)) &&
!dst->child->xfrm && x->type->get_mtu) {
mtu = x->type->get_mtu(x, xdst->child_mtu_cached);
if (skb->len <= mtu)
goto ok;
if (skb_is_gso(skb) && skb_gso_validate_mtu(skb, mtu))
goto ok;
}
return false;
ok:
if (dev && dev->xfrmdev_ops && dev->xfrmdev_ops->xdo_dev_offload_ok)
return x->xso.dev->xfrmdev_ops->xdo_dev_offload_ok(skb, x);
return true;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 181 | 100.00% | 1 | 100.00% |
Total | 181 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(xfrm_dev_offload_ok);
#endif
static int xfrm_dev_register(struct net_device *dev)
{
if ((dev->features & NETIF_F_HW_ESP) && !dev->xfrmdev_ops)
return NOTIFY_BAD;
if ((dev->features & NETIF_F_HW_ESP_TX_CSUM) &&
!(dev->features & NETIF_F_HW_ESP))
return NOTIFY_BAD;
return NOTIFY_DONE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 53 | 98.15% | 1 | 50.00% |
Wei Yongjun | 1 | 1.85% | 1 | 50.00% |
Total | 54 | 100.00% | 2 | 100.00% |
static int xfrm_dev_unregister(struct net_device *dev)
{
xfrm_policy_cache_flush();
return NOTIFY_DONE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 14 | 82.35% | 1 | 50.00% |
Florian Westphal | 3 | 17.65% | 1 | 50.00% |
Total | 17 | 100.00% | 2 | 100.00% |
static int xfrm_dev_feat_change(struct net_device *dev)
{
if ((dev->features & NETIF_F_HW_ESP) && !dev->xfrmdev_ops)
return NOTIFY_BAD;
else if (!(dev->features & NETIF_F_HW_ESP))
dev->xfrmdev_ops = NULL;
if ((dev->features & NETIF_F_HW_ESP_TX_CSUM) &&
!(dev->features & NETIF_F_HW_ESP))
return NOTIFY_BAD;
return NOTIFY_DONE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 72 | 100.00% | 1 | 100.00% |
Total | 72 | 100.00% | 1 | 100.00% |
static int xfrm_dev_down(struct net_device *dev)
{
if (dev->features & NETIF_F_HW_ESP)
xfrm_dev_state_flush(dev_net(dev), dev, true);
xfrm_policy_cache_flush();
return NOTIFY_DONE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 33 | 89.19% | 1 | 33.33% |
Florian Westphal | 3 | 8.11% | 1 | 33.33% |
Ilan Tayari | 1 | 2.70% | 1 | 33.33% |
Total | 37 | 100.00% | 3 | 100.00% |
static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
switch (event) {
case NETDEV_REGISTER:
return xfrm_dev_register(dev);
case NETDEV_UNREGISTER:
return xfrm_dev_unregister(dev);
case NETDEV_FEAT_CHANGE:
return xfrm_dev_feat_change(dev);
case NETDEV_DOWN:
return xfrm_dev_down(dev);
}
return NOTIFY_DONE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 74 | 100.00% | 2 | 100.00% |
Total | 74 | 100.00% | 2 | 100.00% |
static struct notifier_block xfrm_dev_notifier = {
.notifier_call = xfrm_dev_event,
};
void __net_init xfrm_dev_init(void)
{
register_netdevice_notifier(&xfrm_dev_notifier);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 14 | 100.00% | 1 | 100.00% |
Total | 14 | 100.00% | 1 | 100.00% |
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 920 | 97.77% | 4 | 40.00% |
Lorenzo Colitti | 6 | 0.64% | 1 | 10.00% |
Florian Westphal | 6 | 0.64% | 1 | 10.00% |
Hangbin Liu | 5 | 0.53% | 1 | 10.00% |
Ilan Tayari | 3 | 0.32% | 2 | 20.00% |
Wei Yongjun | 1 | 0.11% | 1 | 10.00% |
Total | 941 | 100.00% | 10 | 100.00% |
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