176 lines
4.8 KiB
Diff
176 lines
4.8 KiB
Diff
--- a/include/linux/netdevice.h
|
|
+++ b/include/linux/netdevice.h
|
|
@@ -1093,6 +1093,11 @@ struct net_device {
|
|
const struct net_device_ops *netdev_ops;
|
|
const struct ethtool_ops *ethtool_ops;
|
|
|
|
+#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
|
|
+
|
|
/* Hardware header description */
|
|
const struct header_ops *header_ops;
|
|
|
|
@@ -1149,6 +1154,9 @@ struct net_device {
|
|
void *ax25_ptr; /* AX.25 specific data */
|
|
struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
|
|
assign before registering */
|
|
+#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/uapi/linux/if.h
|
|
+++ b/include/uapi/linux/if.h
|
|
@@ -83,6 +83,7 @@
|
|
#define IFF_SUPP_NOFCS 0x80000 /* device supports sending custom FCS */
|
|
#define IFF_LIVE_ADDR_CHANGE 0x100000 /* device supports hardware address
|
|
* change when it's running */
|
|
+#define IFF_NO_IP_ALIGN 0x200000 /* do not ip-align allocated rx pkts */
|
|
|
|
|
|
#define IF_GET_IFACE 0x0001 /* for querying only */
|
|
--- a/include/linux/skbuff.h
|
|
+++ b/include/linux/skbuff.h
|
|
@@ -1752,6 +1752,10 @@ 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
|
|
@@ -1854,16 +1858,6 @@ 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
|
|
@@ -23,6 +23,12 @@ 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
|
|
@@ -2361,9 +2361,19 @@ int dev_hard_start_xmit(struct sk_buff *
|
|
if (!list_empty(&ptype_all))
|
|
dev_queue_xmit_nit(skb, dev);
|
|
|
|
- skb_len = skb->len;
|
|
- rc = ops->ndo_start_xmit(skb, dev);
|
|
- trace_net_dev_xmit(skb, rc, dev, skb_len);
|
|
+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
|
|
+ if (!dev->eth_mangle_tx ||
|
|
+ (skb = dev->eth_mangle_tx(dev, skb)) != NULL)
|
|
+#else
|
|
+ if (1)
|
|
+#endif
|
|
+ {
|
|
+ skb_len = skb->len;
|
|
+ rc = ops->ndo_start_xmit(skb, dev);
|
|
+ trace_net_dev_xmit(skb, rc, dev, skb_len);
|
|
+ } else {
|
|
+ rc = NETDEV_TX_OK;
|
|
+ }
|
|
if (rc == NETDEV_TX_OK)
|
|
txq_trans_update(txq);
|
|
return rc;
|
|
@@ -2386,9 +2396,19 @@ gso:
|
|
if (!list_empty(&ptype_all))
|
|
dev_queue_xmit_nit(nskb, dev);
|
|
|
|
- skb_len = nskb->len;
|
|
- rc = ops->ndo_start_xmit(nskb, dev);
|
|
- trace_net_dev_xmit(nskb, rc, dev, skb_len);
|
|
+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
|
|
+ if (!dev->eth_mangle_tx ||
|
|
+ (nskb = dev->eth_mangle_tx(dev, nskb)) != NULL)
|
|
+#else
|
|
+ if (1)
|
|
+#endif
|
|
+ {
|
|
+ skb_len = nskb->len;
|
|
+ rc = ops->ndo_start_xmit(nskb, dev);
|
|
+ trace_net_dev_xmit(nskb, rc, dev, skb_len);
|
|
+ } else {
|
|
+ rc = NETDEV_TX_OK;
|
|
+ }
|
|
if (unlikely(rc != NETDEV_TX_OK)) {
|
|
if (rc & ~NETDEV_TX_MASK)
|
|
goto out_kfree_gso_skb;
|
|
--- a/net/core/skbuff.c
|
|
+++ b/net/core/skbuff.c
|
|
@@ -60,6 +60,7 @@
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/errqueue.h>
|
|
#include <linux/prefetch.h>
|
|
+#include <linux/if.h>
|
|
|
|
#include <net/protocol.h>
|
|
#include <net/dst.h>
|
|
@@ -455,6 +456,22 @@ struct sk_buff *__netdev_alloc_skb(struc
|
|
}
|
|
EXPORT_SYMBOL(__netdev_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->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
|
|
@@ -159,6 +159,12 @@ __be16 eth_type_trans(struct sk_buff *sk
|
|
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);
|
|
skb_pull_inline(skb, ETH_HLEN);
|
|
eth = eth_hdr(skb);
|