167 lines
4.6 KiB
Diff
167 lines
4.6 KiB
Diff
--- a/include/linux/netdevice.h
|
|
+++ b/include/linux/netdevice.h
|
|
@@ -1103,6 +1103,11 @@ 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;
|
|
|
|
@@ -1158,6 +1163,9 @@ 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/linux/if.h
|
|
+++ b/include/linux/if.h
|
|
@@ -79,6 +79,7 @@
|
|
#define IFF_TX_SKB_SHARING 0x10000 /* The interface supports sharing
|
|
* skbs on transmit */
|
|
#define IFF_UNICAST_FLT 0x20000 /* Supports unicast filtering */
|
|
+#define IFF_NO_IP_ALIGN 0x40000 /* do not ip-align allocated rx pkts */
|
|
|
|
#define IF_GET_IFACE 0x0001 /* for querying only */
|
|
#define IF_GET_PROTO 0x0002
|
|
--- a/include/linux/skbuff.h
|
|
+++ b/include/linux/skbuff.h
|
|
@@ -1636,6 +1636,10 @@ extern struct sk_buff *dev_alloc_skb(uns
|
|
extern struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
|
|
unsigned int length, gfp_t gfp_mask);
|
|
|
|
+extern struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
|
|
+ unsigned int length, gfp_t gfp);
|
|
+
|
|
+
|
|
/**
|
|
* netdev_alloc_skb - allocate an skbuff for rx on a specific device
|
|
* @dev: network device to receive on
|
|
@@ -1655,16 +1659,6 @@ static inline struct sk_buff *netdev_all
|
|
return __netdev_alloc_skb(dev, length, GFP_ATOMIC);
|
|
}
|
|
|
|
-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
|
|
@@ -2224,9 +2224,19 @@ int dev_hard_start_xmit(struct sk_buff *
|
|
}
|
|
}
|
|
|
|
- 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;
|
|
@@ -2246,9 +2256,19 @@ gso:
|
|
if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
|
|
skb_dst_drop(nskb);
|
|
|
|
- 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
|
|
@@ -271,6 +271,22 @@ 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)
|
|
{
|
|
--- a/net/ethernet/eth.c
|
|
+++ b/net/ethernet/eth.c
|
|
@@ -160,6 +160,12 @@ __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);
|