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Diffstat (limited to 'target/mips/dragino-ms14s/patches/3.14.17/0018-net-allow-PHY-drivers-to-insert-packet-mangle-hooks.patch')
-rw-r--r--target/mips/dragino-ms14s/patches/3.14.17/0018-net-allow-PHY-drivers-to-insert-packet-mangle-hooks.patch211
1 files changed, 211 insertions, 0 deletions
diff --git a/target/mips/dragino-ms14s/patches/3.14.17/0018-net-allow-PHY-drivers-to-insert-packet-mangle-hooks.patch b/target/mips/dragino-ms14s/patches/3.14.17/0018-net-allow-PHY-drivers-to-insert-packet-mangle-hooks.patch
new file mode 100644
index 000000000..6a372c8f1
--- /dev/null
+++ b/target/mips/dragino-ms14s/patches/3.14.17/0018-net-allow-PHY-drivers-to-insert-packet-mangle-hooks.patch
@@ -0,0 +1,211 @@
+From ebca842041d737b7441748a17ffd535aab851fce Mon Sep 17 00:00:00 2001
+From: Phil Sutter <phil@nwl.cc>
+Date: Tue, 13 May 2014 01:32:11 +0200
+Subject: [PATCH] net: allow PHY drivers to insert packet mangle hooks
+
+---
+ include/linux/netdevice.h | 8 ++++++++
+ include/linux/skbuff.h | 14 ++++----------
+ include/uapi/linux/if.h | 1 +
+ net/Kconfig | 6 ++++++
+ net/core/dev.c | 36 ++++++++++++++++++++++++++++--------
+ net/core/skbuff.c | 17 +++++++++++++++++
+ net/ethernet/eth.c | 6 ++++++
+ 7 files changed, 70 insertions(+), 18 deletions(-)
+
+diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
+index 911718f..8e8dd46 100644
+--- a/include/linux/netdevice.h
++++ b/include/linux/netdevice.h
+@@ -1245,6 +1245,11 @@ struct net_device {
+ const struct ethtool_ops *ethtool_ops;
+ const struct forwarding_accel_ops *fwd_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;
+
+@@ -1313,6 +1318,9 @@ 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())
+diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
+index 15ede6a..5530766 100644
+--- a/include/linux/skbuff.h
++++ b/include/linux/skbuff.h
+@@ -1858,6 +1858,10 @@ static inline int pskb_trim(struct sk_buff *skb, unsigned int len)
+ 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
+@@ -1966,16 +1970,6 @@ static inline struct sk_buff *dev_alloc_skb(unsigned int length)
+ }
+
+
+-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)
+ {
+diff --git a/include/uapi/linux/if.h b/include/uapi/linux/if.h
+index d758163..7ffa548 100644
+--- a/include/uapi/linux/if.h
++++ b/include/uapi/linux/if.h
+@@ -84,6 +84,7 @@
+ #define IFF_LIVE_ADDR_CHANGE 0x100000 /* device supports hardware address
+ * change when it's running */
+ #define IFF_MACVLAN 0x200000 /* Macvlan device */
++#define IFF_NO_IP_ALIGN 0x400000 /* do not ip-align allocated rx pkts */
+
+
+ #define IF_GET_IFACE 0x0001 /* for querying only */
+diff --git a/net/Kconfig b/net/Kconfig
+index e411046..970c52a 100644
+--- a/net/Kconfig
++++ b/net/Kconfig
+@@ -24,6 +24,12 @@ 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
+diff --git a/net/core/dev.c b/net/core/dev.c
+index fccc195..2e0ba23 100644
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -2607,10 +2607,20 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
+ if (!list_empty(&ptype_all))
+ dev_queue_xmit_nit(skb, dev);
+
+- skb_len = skb->len;
+- trace_net_dev_start_xmit(skb, dev);
+- 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;
++ trace_net_dev_start_xmit(skb, dev);
++ 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;
+@@ -2626,10 +2636,20 @@ gso:
+ if (!list_empty(&ptype_all))
+ dev_queue_xmit_nit(nskb, dev);
+
+- skb_len = nskb->len;
+- trace_net_dev_start_xmit(nskb, dev);
+- 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;
++ trace_net_dev_start_xmit(nskb, dev);
++ 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;
+diff --git a/net/core/skbuff.c b/net/core/skbuff.c
+index e5ae776e..400ff2a 100644
+--- a/net/core/skbuff.c
++++ b/net/core/skbuff.c
+@@ -62,6 +62,7 @@
+ #include <linux/scatterlist.h>
+ #include <linux/errqueue.h>
+ #include <linux/prefetch.h>
++#include <uapi/linux/if.h>
+
+ #include <net/protocol.h>
+ #include <net/dst.h>
+@@ -439,6 +440,22 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
+ }
+ 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 && (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)
+ {
+diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
+index 5dc638c..f4fd124 100644
+--- a/net/ethernet/eth.c
++++ b/net/ethernet/eth.c
+@@ -161,6 +161,12 @@ __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
+ 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);
+ skb_pull_inline(skb, ETH_HLEN);
+ eth = eth_hdr(skb);
+--
+1.8.5.3
+
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