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kernel: rewrite the phy packet hook, put it in the network stack to avoid having to keep non-upstream ethernet driver changes

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31637 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
2012-05-06 21:19:14 +00:00
parent ecb548b2e5
commit d4d537811b
37 changed files with 414 additions and 444 deletions
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220
target/linux/generic/patches-3.3/721-phy_packets.patch
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@@ -1,63 +1,175 @@
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -149,6 +149,18 @@ int phy_scan_fixups(struct phy_device *p
}
EXPORT_SYMBOL(phy_scan_fixups);
+static int generic_receive_skb(struct sk_buff *skb)
+{
+ skb->protocol = eth_type_trans(skb, skb->dev);
+ return netif_receive_skb(skb);
+}
+
+static int generic_rx(struct sk_buff *skb)
+{
+ skb->protocol = eth_type_trans(skb, skb->dev);
+ return netif_rx(skb);
+}
+
static struct phy_device* phy_device_create(struct mii_bus *bus,
int addr, int phy_id)
{
@@ -180,6 +192,8 @@ static struct phy_device* phy_device_cre
dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr);
dev->state = PHY_DOWN;
+ dev->netif_receive_skb = &generic_receive_skb;
+ dev->netif_rx = &generic_rx;
mutex_init(&dev->lock);
INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -339,6 +339,20 @@ struct phy_device {
void (*adjust_link)(struct net_device *dev);
void (*adjust_state)(struct net_device *dev);
+
+ /*
+ * By default these point to the original functions
+ * with the same name. adding them to the phy_device
+ * allows the phy driver to override them for packet
+ * mangling if the ethernet driver supports it
+ * This is required to support some really horrible
+ * switches such as the Marvell 88E6060
+ */
+ int (*netif_receive_skb)(struct sk_buff *skb);
+ int (*netif_rx)(struct sk_buff *skb);
+
+ /* alignment offset for packets */
+ int pkt_align;
};
#define to_phy_device(d) container_of(d, struct phy_device, dev)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1134,6 +1134,7 @@ struct net_device {
@@ -1078,6 +1078,11 @@ 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;
@@ -1134,6 +1139,9 @@ 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
@@ -80,6 +80,7 @@
* skbs on transmit */
#define IFF_UNICAST_FLT 0x20000 /* Supports unicast filtering */
#define IFF_TEAM_PORT 0x40000 /* device used as team port */
+#define IFF_NO_IP_ALIGN 0x80000 /* 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
@@ -1661,6 +1661,10 @@ 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
@@ -1680,16 +1684,6 @@ 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
@@ -2246,9 +2246,19 @@ 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;
@@ -2268,9 +2278,19 @@ 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
@@ -58,6 +58,7 @@
#include <linux/scatterlist.h>
#include <linux/errqueue.h>
#include <linux/prefetch.h>
+#include <linux/if.h>
#include <net/protocol.h>
#include <net/dst.h>
@@ -320,6 +321,22 @@ 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);