kernel: start working on 3.18 support

[15.05/openwrt.git] / target / linux / generic / patches-3.18 / 721-phy_packets.patch

diff --git a/target/linux/generic/patches-3.18/721-phy_packets.patch b/target/linux/generic/patches-3.18/721-phy_packets.patch
new file mode 100644 (file)
index 0000000..d90462e
--- /dev/null
+++ b/target/linux/generic/patches-3.18/721-phy_packets.patch
@@ -0,0 +1,154 @@
+--- 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())
+--- 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 */
+--- a/include/linux/skbuff.h
++++ b/include/linux/skbuff.h
+@@ -1858,6 +1858,10 @@ 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
+@@ -1984,16 +1988,6 @@ 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
+@@ -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
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -2614,10 +2614,20 @@ int dev_hard_start_xmit(struct sk_buff *
+               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;
+--- 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 <linux/if.h>
+ 
+ #include <net/protocol.h>
+ #include <net/dst.h>
+@@ -439,6 +440,22 @@ 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 && (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
+@@ -161,6 +161,12 @@ __be16 eth_type_trans(struct sk_buff *sk
+       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);