diff options
| author | Jarod Wilson <jarod@redhat.com> | 2020-06-19 10:31:52 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-22 15:38:56 -0700 |
| commit | 272c2330adc9c68284cb0066719160c24bfe605f (patch) | |
| tree | 087f176b55123bb750f8e217e498c40699bcfc1b /net/xfrm | |
| parent | 389cc2f326fd095edc1c09d7713ac9f9dd591f8a (diff) | |
| download | lwn-272c2330adc9c68284cb0066719160c24bfe605f.tar.gz lwn-272c2330adc9c68284cb0066719160c24bfe605f.zip | |
xfrm: bail early on slave pass over skb
This is prep work for initial support of bonding hardware encryption
pass-through support. The bonding driver will fill in the slave_dev
pointer, and we use that to know not to skb_push() again on a given
skb that was already processed on the bond device.
CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: "David S. Miller" <davem@davemloft.net>
CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: Jakub Kicinski <kuba@kernel.org>
CC: Steffen Klassert <steffen.klassert@secunet.com>
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: netdev@vger.kernel.org
CC: intel-wired-lan@lists.osuosl.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
| -rw-r--r-- | net/xfrm/xfrm_device.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c index f50d1f97cf8e..b8918fc5248b 100644 --- a/net/xfrm/xfrm_device.c +++ b/net/xfrm/xfrm_device.c @@ -106,6 +106,7 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur struct sk_buff *skb2, *nskb, *pskb = NULL; netdev_features_t esp_features = features; struct xfrm_offload *xo = xfrm_offload(skb); + struct net_device *dev = skb->dev; struct sec_path *sp; if (!xo) @@ -119,6 +120,10 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur if (xo->flags & XFRM_GRO || x->xso.flags & XFRM_OFFLOAD_INBOUND) return skb; + /* This skb was already validated on the master dev */ + if ((x->xso.dev != dev) && (x->xso.slave_dev == dev)) + return skb; + local_irq_save(flags); sd = this_cpu_ptr(&softnet_data); err = !skb_queue_empty(&sd->xfrm_backlog); @@ -129,25 +134,20 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur return skb; } - if (skb_is_gso(skb)) { - struct net_device *dev = skb->dev; - - if (unlikely(x->xso.dev != dev)) { - struct sk_buff *segs; + if (skb_is_gso(skb) && unlikely(x->xso.dev != dev)) { + struct sk_buff *segs; - /* Packet got rerouted, fixup features and segment it. */ - esp_features = esp_features & ~(NETIF_F_HW_ESP - | NETIF_F_GSO_ESP); + /* Packet got rerouted, fixup features and segment it. */ + esp_features = esp_features & ~(NETIF_F_HW_ESP | NETIF_F_GSO_ESP); - segs = skb_gso_segment(skb, esp_features); - if (IS_ERR(segs)) { - kfree_skb(skb); - atomic_long_inc(&dev->tx_dropped); - return NULL; - } else { - consume_skb(skb); - skb = segs; - } + segs = skb_gso_segment(skb, esp_features); + if (IS_ERR(segs)) { + kfree_skb(skb); + atomic_long_inc(&dev->tx_dropped); + return NULL; + } else { + consume_skb(skb); + skb = segs; } } |