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176 lines
4.8 KiB
Diff
176 lines
4.8 KiB
Diff
--- a/include/linux/netdevice.h
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+++ b/include/linux/netdevice.h
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@@ -1078,6 +1078,11 @@ struct net_device {
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const struct net_device_ops *netdev_ops;
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const struct ethtool_ops *ethtool_ops;
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+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
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+ void (*eth_mangle_rx)(struct net_device *dev, struct sk_buff *skb);
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+ struct sk_buff *(*eth_mangle_tx)(struct net_device *dev, struct sk_buff *skb);
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+#endif
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+
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/* Hardware header description */
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const struct header_ops *header_ops;
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@@ -1134,6 +1139,9 @@ struct net_device {
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void *ax25_ptr; /* AX.25 specific data */
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struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
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assign before registering */
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+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
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+ void *phy_ptr; /* PHY device specific data */
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+#endif
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/*
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* Cache lines mostly used on receive path (including eth_type_trans())
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--- a/include/linux/if.h
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+++ b/include/linux/if.h
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@@ -80,6 +80,7 @@
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* skbs on transmit */
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#define IFF_UNICAST_FLT 0x20000 /* Supports unicast filtering */
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#define IFF_TEAM_PORT 0x40000 /* device used as team port */
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+#define IFF_NO_IP_ALIGN 0x80000 /* do not ip-align allocated rx pkts */
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#define IF_GET_IFACE 0x0001 /* for querying only */
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#define IF_GET_PROTO 0x0002
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--- a/include/linux/skbuff.h
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+++ b/include/linux/skbuff.h
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@@ -1661,6 +1661,10 @@ extern struct sk_buff *dev_alloc_skb(uns
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extern struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
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unsigned int length, gfp_t gfp_mask);
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+extern struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
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+ unsigned int length, gfp_t gfp);
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+
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+
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/**
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* netdev_alloc_skb - allocate an skbuff for rx on a specific device
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* @dev: network device to receive on
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@@ -1680,16 +1684,6 @@ static inline struct sk_buff *netdev_all
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return __netdev_alloc_skb(dev, length, GFP_ATOMIC);
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}
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-static inline struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
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- unsigned int length, gfp_t gfp)
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-{
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- struct sk_buff *skb = __netdev_alloc_skb(dev, length + NET_IP_ALIGN, gfp);
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-
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- if (NET_IP_ALIGN && skb)
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- skb_reserve(skb, NET_IP_ALIGN);
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- return skb;
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-}
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-
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static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev,
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unsigned int length)
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{
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--- a/net/Kconfig
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+++ b/net/Kconfig
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@@ -23,6 +23,12 @@ menuconfig NET
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if NET
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+config ETHERNET_PACKET_MANGLE
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+ bool
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+ help
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+ This option can be selected by phy drivers that need to mangle
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+ packets going in or out of an ethernet device.
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+
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config WANT_COMPAT_NETLINK_MESSAGES
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bool
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help
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--- a/net/core/dev.c
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+++ b/net/core/dev.c
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@@ -2266,9 +2266,19 @@ int dev_hard_start_xmit(struct sk_buff *
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}
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}
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- skb_len = skb->len;
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- rc = ops->ndo_start_xmit(skb, dev);
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- trace_net_dev_xmit(skb, rc, dev, skb_len);
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+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
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+ if (!dev->eth_mangle_tx ||
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+ (skb = dev->eth_mangle_tx(dev, skb)) != NULL)
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+#else
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+ if (1)
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+#endif
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+ {
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+ skb_len = skb->len;
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+ rc = ops->ndo_start_xmit(skb, dev);
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+ trace_net_dev_xmit(skb, rc, dev, skb_len);
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+ } else {
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+ rc = NETDEV_TX_OK;
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+ }
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if (rc == NETDEV_TX_OK)
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txq_trans_update(txq);
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return rc;
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@@ -2288,9 +2298,19 @@ gso:
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if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
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skb_dst_drop(nskb);
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- skb_len = nskb->len;
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- rc = ops->ndo_start_xmit(nskb, dev);
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- trace_net_dev_xmit(nskb, rc, dev, skb_len);
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+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
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+ if (!dev->eth_mangle_tx ||
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+ (nskb = dev->eth_mangle_tx(dev, nskb)) != NULL)
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+#else
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+ if (1)
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+#endif
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+ {
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+ skb_len = nskb->len;
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+ rc = ops->ndo_start_xmit(nskb, dev);
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+ trace_net_dev_xmit(nskb, rc, dev, skb_len);
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+ } else {
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+ rc = NETDEV_TX_OK;
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+ }
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if (unlikely(rc != NETDEV_TX_OK)) {
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if (rc & ~NETDEV_TX_MASK)
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goto out_kfree_gso_skb;
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--- a/net/core/skbuff.c
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+++ b/net/core/skbuff.c
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@@ -58,6 +58,7 @@
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#include <linux/scatterlist.h>
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#include <linux/errqueue.h>
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#include <linux/prefetch.h>
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+#include <linux/if.h>
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#include <net/protocol.h>
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#include <net/dst.h>
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@@ -320,6 +321,22 @@ struct sk_buff *__netdev_alloc_skb(struc
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}
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EXPORT_SYMBOL(__netdev_alloc_skb);
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+struct sk_buff *__netdev_alloc_skb_ip_align(struct net_device *dev,
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+ unsigned int length, gfp_t gfp)
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+{
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+ struct sk_buff *skb = __netdev_alloc_skb(dev, length + NET_IP_ALIGN, gfp);
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+
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+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
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+ if (dev->priv_flags & IFF_NO_IP_ALIGN)
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+ return skb;
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+#endif
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+
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+ if (NET_IP_ALIGN && skb)
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+ skb_reserve(skb, NET_IP_ALIGN);
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+ return skb;
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+}
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+EXPORT_SYMBOL(__netdev_alloc_skb_ip_align);
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+
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void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page, int off,
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int size)
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{
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--- a/net/ethernet/eth.c
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+++ b/net/ethernet/eth.c
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@@ -160,6 +160,12 @@ __be16 eth_type_trans(struct sk_buff *sk
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struct ethhdr *eth;
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skb->dev = dev;
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+
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+#ifdef CONFIG_ETHERNET_PACKET_MANGLE
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+ if (dev->eth_mangle_rx)
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+ dev->eth_mangle_rx(dev, skb);
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+#endif
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+
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skb_reset_mac_header(skb);
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skb_pull_inline(skb, ETH_HLEN);
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eth = eth_hdr(skb);
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