d0ba3bb1e2
it has been non-functional for years and caused numerous memleaks and crashes for people that tried to enable it. it has no maintained upstream source, and it does not look like it's going to be fixed any time soon Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 45423
161 lines
4.3 KiB
Diff
161 lines
4.3 KiB
Diff
--- a/include/linux/netdevice.h
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+++ b/include/linux/netdevice.h
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@@ -1260,6 +1260,7 @@ enum netdev_priv_flags {
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IFF_XMIT_DST_RELEASE_PERM = 1<<22,
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IFF_IPVLAN_MASTER = 1<<23,
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IFF_IPVLAN_SLAVE = 1<<24,
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+ IFF_NO_IP_ALIGN = 1<<25,
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};
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#define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
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@@ -1287,6 +1288,7 @@ enum netdev_priv_flags {
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#define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
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#define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
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#define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
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+#define IFF_NO_IP_ALIGN IFF_NO_IP_ALIGN
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/**
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* struct net_device - The DEVICE structure.
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@@ -1559,6 +1561,11 @@ struct net_device {
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const struct ethtool_ops *ethtool_ops;
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const struct forwarding_accel_ops *fwd_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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const struct header_ops *header_ops;
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unsigned int flags;
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@@ -1624,6 +1631,10 @@ struct net_device {
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struct wireless_dev *ieee80211_ptr;
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struct wpan_dev *ieee802154_ptr;
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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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/*
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* Cache lines mostly used on receive path (including eth_type_trans())
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*/
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--- a/include/linux/skbuff.h
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+++ b/include/linux/skbuff.h
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@@ -2057,6 +2057,10 @@ static inline int pskb_trim(struct sk_bu
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return (len < skb->len) ? __pskb_trim(skb, len) : 0;
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}
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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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* pskb_trim_unique - remove end from a paged unique (not cloned) buffer
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* @skb: buffer to alter
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@@ -2183,16 +2187,6 @@ static inline struct sk_buff *dev_alloc_
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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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@@ -25,6 +25,12 @@ 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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@@ -2618,10 +2618,20 @@ static int xmit_one(struct sk_buff *skb,
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if (!list_empty(&ptype_all) || !list_empty(&dev->ptype_all))
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dev_queue_xmit_nit(skb, dev);
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- len = skb->len;
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- trace_net_dev_start_xmit(skb, dev);
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- rc = netdev_start_xmit(skb, dev, txq, more);
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- trace_net_dev_xmit(skb, rc, dev, 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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+ len = skb->len;
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+ trace_net_dev_start_xmit(skb, dev);
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+ rc = netdev_start_xmit(skb, dev, txq, more);
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+ trace_net_dev_xmit(skb, rc, dev, len);
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+ } else {
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+ rc = NETDEV_TX_OK;
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+ }
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return rc;
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}
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--- a/net/core/skbuff.c
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+++ b/net/core/skbuff.c
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@@ -63,6 +63,7 @@
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#include <linux/errqueue.h>
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#include <linux/prefetch.h>
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#include <linux/if_vlan.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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@@ -550,6 +551,22 @@ struct sk_buff *__napi_alloc_skb(struct
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}
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EXPORT_SYMBOL(__napi_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 && (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, unsigned int truesize)
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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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@@ -200,6 +200,12 @@ __be16 eth_type_trans(struct sk_buff *sk
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const 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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