vlan: uninline __vlan_hwaccel_rx

The function is huge and included at least once in every VLAN acceleration
capable driver. Uninline it; to avoid having drivers depend on the VLAN
module, the function is always built in statically when VLAN is enabled.

With all VLAN acceleration capable drivers that build on x86_64 enabled,
this results in:

   text    data     bss     dec     hex filename
6515227  854044  343968 7713239  75b1d7 vmlinux.inlined
6505637  854044  343968 7703649  758c61 vmlinux.uninlined
----------------------------------------------------------
  -9590

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 64 insertions, 5 deletions

diff --git a/net/8021q/Makefile b/net/8021q/Makefile
index 3006e9ed7b08..9f4f174ead1c 100644
--- a/net/8021q/Makefile
+++ b/net/8021q/Makefile
@@ -1,9 +1,10 @@
 #
 # Makefile for the Linux VLAN layer.
 #
+obj-$(subst m,y,$(CONFIG_VLAN_8021Q))   += vlan_core.o
+obj-$(CONFIG_VLAN_8021Q)                += 8021q.o
 
-obj-$(CONFIG_VLAN_8021Q) += 8021q.o
+8021q-y                                 := vlan.o vlan_dev.o vlan_netlink.o
+8021q-$(CONFIG_VLAN_8021Q_GVRP)         += vlan_gvrp.o
+8021q-$(CONFIG_PROC_FS)                 += vlanproc.o
 
-8021q-y                         := vlan.o vlan_dev.o vlan_netlink.o
-8021q-$(CONFIG_VLAN_8021Q_GVRP) += vlan_gvrp.o
-8021q-$(CONFIG_PROC_FS)         += vlanproc.o
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 097b2e04c928..7cc1a97c42fc 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -37,6 +37,14 @@ void vlan_setup(struct net_device *dev);
 int register_vlan_dev(struct net_device *dev);
 void unregister_vlan_dev(struct net_device *dev);
 
+static inline u32 vlan_get_ingress_priority(struct net_device *dev,
+                                            unsigned short vlan_tag)
+{
+        struct vlan_dev_info *vip = vlan_dev_info(dev);
+
+        return vip->ingress_priority_map[(vlan_tag >> 13) & 0x7];
+}
+
 #ifdef CONFIG_VLAN_8021Q_GVRP
 extern int vlan_gvrp_request_join(const struct net_device *dev);
 extern void vlan_gvrp_request_leave(const struct net_device *dev);
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
new file mode 100644
index 000000000000..85c94edb000f
--- /dev/null
+++ b/net/8021q/vlan_core.c
@@ -0,0 +1,48 @@
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/if_vlan.h>
+#include "vlan.h"
+
+/* VLAN rx hw acceleration helper.  This acts like netif_{rx,receive_skb}(). */
+int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
+                      unsigned short vlan_tag, int polling)
+{
+        struct net_device_stats *stats;
+
+        if (skb_bond_should_drop(skb)) {
+                dev_kfree_skb_any(skb);
+                return NET_RX_DROP;
+        }
+
+        skb->dev = vlan_group_get_device(grp, vlan_tag & VLAN_VID_MASK);
+        if (skb->dev == NULL) {
+                dev_kfree_skb_any(skb);
+                /* Not NET_RX_DROP, this is not being dropped
+                 * due to congestion. */
+                return NET_RX_SUCCESS;
+        }
+        skb->dev->last_rx = jiffies;
+
+        stats = &skb->dev->stats;
+        stats->rx_packets++;
+        stats->rx_bytes += skb->len;
+
+        skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tag);
+        switch (skb->pkt_type) {
+        case PACKET_BROADCAST:
+                break;
+        case PACKET_MULTICAST:
+                stats->multicast++;
+                break;
+        case PACKET_OTHERHOST:
+                /* Our lower layer thinks this is not local, let's make sure.
+                 * This allows the VLAN to have a different MAC than the
+                 * underlying device, and still route correctly. */
+                if (!compare_ether_addr(eth_hdr(skb)->h_dest,
+                                        skb->dev->dev_addr))
+                        skb->pkt_type = PACKET_HOST;
+                break;
+        };
+        return (polling ? netif_receive_skb(skb) : netif_rx(skb));
+}
+EXPORT_SYMBOL(__vlan_hwaccel_rx);
diff --git a/net/Makefile b/net/Makefile
index b7a13643b549..4f43e7f874f3 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -42,7 +42,9 @@ obj-$(CONFIG_AF_RXRPC)		+= rxrpc/
 obj-$(CONFIG_ATM)               += atm/
 obj-$(CONFIG_DECNET)            += decnet/
 obj-$(CONFIG_ECONET)            += econet/
-obj-$(CONFIG_VLAN_8021Q)        += 8021q/
+ifneq ($(CONFIG_VLAN_8021Q),)
+obj-y                           += 8021q/
+endif
 obj-$(CONFIG_IP_DCCP)           += dccp/
 obj-$(CONFIG_IP_SCTP)           += sctp/
 obj-y                           += wireless/