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xfrm: Add a dummy network device for napi. 

This patch adds a dummy network device so that we can
use gro_cells for IPsec GRO. With this, we handle IPsec
GRO with no impact on the generic networking code.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Steffen Klassert 2017-01-30 06:45:43 +01:00
parent f991bb9da1
commit 1995876a06
1 changed files with 11 additions and 1 deletions
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12
net/xfrm/xfrm_input.c
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@ -21,6 +21,9 @@ static struct kmem_cache *secpath_cachep __read_mostly;
static DEFINE_SPINLOCK(xfrm_input_afinfo_lock);
static struct xfrm_input_afinfo __rcu *xfrm_input_afinfo[NPROTO];
static struct gro_cells gro_cells;
static struct net_device xfrm_napi_dev;
int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo)
{
int err = 0;
@ -371,7 +374,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
if (decaps) {
skb_dst_drop(skb);
netif_rx(skb);
gro_cells_receive(&gro_cells, skb);
return 0;
} else {
return x->inner_mode->afinfo->transport_finish(skb, async);
@ -394,6 +397,13 @@ EXPORT_SYMBOL(xfrm_input_resume);
void __init xfrm_input_init(void)
{
int err;
init_dummy_netdev(&xfrm_napi_dev);
err = gro_cells_init(&gro_cells, &xfrm_napi_dev);
if (err)
gro_cells.cells = NULL;
secpath_cachep = kmem_cache_create("secpath_cache",
sizeof(struct sec_path),
0, SLAB_HWCACHE_ALIGN|SLAB_PANIC,