162 lines
4.1 KiB
Diff
162 lines
4.1 KiB
Diff
--- a/include/linux/netdevice.h
|
|
+++ b/include/linux/netdevice.h
|
|
@@ -1297,6 +1297,7 @@ enum netdev_priv_flags {
|
|
IFF_NO_QUEUE = 1<<21,
|
|
IFF_OPENVSWITCH = 1<<22,
|
|
IFF_L3MDEV_SLAVE = 1<<23,
|
|
+ IFF_NO_IP_ALIGN = 1<<24,
|
|
};
|
|
|
|
#define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
|
|
@@ -1323,6 +1324,7 @@ enum netdev_priv_flags {
|
|
#define IFF_NO_QUEUE IFF_NO_QUEUE
|
|
#define IFF_OPENVSWITCH IFF_OPENVSWITCH
|
|
#define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
|
|
+#define IFF_NO_IP_ALIGN IFF_NO_IP_ALIGN
|
|
|
|
/**
|
|
* struct net_device - The DEVICE structure.
|
|
@@ -1603,6 +1605,11 @@ struct net_device {
|
|
const struct l3mdev_ops *l3mdev_ops;
|
|
#endif
|
|
|
|
+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
|
|
+ void (*eth_mangle_rx)(struct net_device *dev, struct sk_buff *skb);
|
|
+ struct sk_buff *(*eth_mangle_tx)(struct net_device *dev, struct sk_buff *skb);
|
|
+#endif
|
|
+
|
|
const struct header_ops *header_ops;
|
|
|
|
unsigned int flags;
|
|
@@ -1670,6 +1677,10 @@ struct net_device {
|
|
struct mpls_dev __rcu *mpls_ptr;
|
|
#endif
|
|
|
|
+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
|
|
+ void *phy_ptr; /* PHY device specific data */
|
|
+#endif
|
|
+
|
|
/*
|
|
* Cache lines mostly used on receive path (including eth_type_trans())
|
|
*/
|
|
--- a/include/linux/skbuff.h
|
|
+++ b/include/linux/skbuff.h
|
|
@@ -2208,6 +2208,10 @@ static inline int pskb_trim(struct sk_bu
|
|
return (len < skb->len) ? __pskb_trim(skb, len) : 0;
|
|
}
|
|
|
|
+extern struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
|
|
+ unsigned int length, gfp_t gfp);
|
|
+
|
|
+
|
|
/**
|
|
* pskb_trim_unique - remove end from a paged unique (not cloned) buffer
|
|
* @skb: buffer to alter
|
|
@@ -2312,16 +2316,6 @@ static inline struct sk_buff *dev_alloc_
|
|
}
|
|
|
|
|
|
-static inline struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
|
|
- unsigned int length, gfp_t gfp)
|
|
-{
|
|
- struct sk_buff *skb = __netdev_alloc_skb(dev, length + NET_IP_ALIGN, gfp);
|
|
-
|
|
- if (NET_IP_ALIGN && skb)
|
|
- skb_reserve(skb, NET_IP_ALIGN);
|
|
- return skb;
|
|
-}
|
|
-
|
|
static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev,
|
|
unsigned int length)
|
|
{
|
|
--- a/net/Kconfig
|
|
+++ b/net/Kconfig
|
|
@@ -25,6 +25,12 @@ menuconfig NET
|
|
|
|
if NET
|
|
|
|
+config ETHERNET_PACKET_MANGLE
|
|
+ bool
|
|
+ help
|
|
+ This option can be selected by phy drivers that need to mangle
|
|
+ packets going in or out of an ethernet device.
|
|
+
|
|
config WANT_COMPAT_NETLINK_MESSAGES
|
|
bool
|
|
help
|
|
--- a/net/core/dev.c
|
|
+++ b/net/core/dev.c
|
|
@@ -2747,10 +2747,20 @@ static int xmit_one(struct sk_buff *skb,
|
|
if (!list_empty(&ptype_all) || !list_empty(&dev->ptype_all))
|
|
dev_queue_xmit_nit(skb, dev);
|
|
|
|
- len = skb->len;
|
|
- trace_net_dev_start_xmit(skb, dev);
|
|
- rc = netdev_start_xmit(skb, dev, txq, more);
|
|
- trace_net_dev_xmit(skb, rc, dev, len);
|
|
+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
|
|
+ if (!dev->eth_mangle_tx ||
|
|
+ (skb = dev->eth_mangle_tx(dev, skb)) != NULL)
|
|
+#else
|
|
+ if (1)
|
|
+#endif
|
|
+ {
|
|
+ len = skb->len;
|
|
+ trace_net_dev_start_xmit(skb, dev);
|
|
+ rc = netdev_start_xmit(skb, dev, txq, more);
|
|
+ trace_net_dev_xmit(skb, rc, dev, len);
|
|
+ } else {
|
|
+ rc = NETDEV_TX_OK;
|
|
+ }
|
|
|
|
return rc;
|
|
}
|
|
--- a/net/core/skbuff.c
|
|
+++ b/net/core/skbuff.c
|
|
@@ -63,6 +63,7 @@
|
|
#include <linux/errqueue.h>
|
|
#include <linux/prefetch.h>
|
|
#include <linux/if_vlan.h>
|
|
+#include <linux/if.h>
|
|
|
|
#include <net/protocol.h>
|
|
#include <net/dst.h>
|
|
@@ -520,6 +521,22 @@ skb_fail:
|
|
}
|
|
EXPORT_SYMBOL(__napi_alloc_skb);
|
|
|
|
+struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
|
|
+ unsigned int length, gfp_t gfp)
|
|
+{
|
|
+ struct sk_buff *skb = __netdev_alloc_skb(dev, length + NET_IP_ALIGN, gfp);
|
|
+
|
|
+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
|
|
+ if (dev && (dev->priv_flags & IFF_NO_IP_ALIGN))
|
|
+ return skb;
|
|
+#endif
|
|
+
|
|
+ if (NET_IP_ALIGN && skb)
|
|
+ skb_reserve(skb, NET_IP_ALIGN);
|
|
+ return skb;
|
|
+}
|
|
+EXPORT_SYMBOL(__netdev_alloc_skb_ip_align);
|
|
+
|
|
void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page, int off,
|
|
int size, unsigned int truesize)
|
|
{
|
|
--- a/net/ethernet/eth.c
|
|
+++ b/net/ethernet/eth.c
|
|
@@ -168,6 +168,12 @@ __be16 eth_type_trans(struct sk_buff *sk
|
|
const struct ethhdr *eth;
|
|
|
|
skb->dev = dev;
|
|
+
|
|
+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
|
|
+ if (dev->eth_mangle_rx)
|
|
+ dev->eth_mangle_rx(dev, skb);
|
|
+#endif
|
|
+
|
|
skb_reset_mac_header(skb);
|
|
|
|
eth = (struct ethhdr *)skb->data;
|