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https://github.com/edk2-porting/linux-next.git
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1db9e29bb0
Hi: gro: Normalise skb before bypassing GRO on netpoll VLAN path When we detect netpoll RX on the GRO VLAN path we bail out and call the normal VLAN receive handler. However, the packet needs to be normalised by calling eth_type_trans since that's what the normal path expects (normally the GRO path does the fixup). This patch adds the necessary call to vlan_gro_frags. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Thanks, Signed-off-by: David S. Miller <davem@davemloft.net>
133 lines
3.1 KiB
C
133 lines
3.1 KiB
C
#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/if_vlan.h>
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#include <linux/netpoll.h>
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#include "vlan.h"
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/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
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int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
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u16 vlan_tci, int polling)
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{
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if (netpoll_rx(skb))
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return NET_RX_DROP;
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if (skb_bond_should_drop(skb))
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goto drop;
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skb->vlan_tci = vlan_tci;
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skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);
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if (!skb->dev)
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goto drop;
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return (polling ? netif_receive_skb(skb) : netif_rx(skb));
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drop:
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dev_kfree_skb_any(skb);
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return NET_RX_DROP;
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}
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EXPORT_SYMBOL(__vlan_hwaccel_rx);
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int vlan_hwaccel_do_receive(struct sk_buff *skb)
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{
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struct net_device *dev = skb->dev;
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struct net_device_stats *stats;
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skb->dev = vlan_dev_info(dev)->real_dev;
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netif_nit_deliver(skb);
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skb->dev = dev;
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skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci);
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skb->vlan_tci = 0;
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stats = &dev->stats;
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stats->rx_packets++;
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stats->rx_bytes += skb->len;
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switch (skb->pkt_type) {
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case PACKET_BROADCAST:
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break;
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case PACKET_MULTICAST:
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stats->multicast++;
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break;
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case PACKET_OTHERHOST:
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/* Our lower layer thinks this is not local, let's make sure.
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* This allows the VLAN to have a different MAC than the
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* underlying device, and still route correctly. */
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if (!compare_ether_addr(eth_hdr(skb)->h_dest,
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dev->dev_addr))
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skb->pkt_type = PACKET_HOST;
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break;
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};
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return 0;
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}
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struct net_device *vlan_dev_real_dev(const struct net_device *dev)
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{
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return vlan_dev_info(dev)->real_dev;
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}
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EXPORT_SYMBOL(vlan_dev_real_dev);
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u16 vlan_dev_vlan_id(const struct net_device *dev)
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{
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return vlan_dev_info(dev)->vlan_id;
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}
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EXPORT_SYMBOL(vlan_dev_vlan_id);
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static int vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
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unsigned int vlan_tci, struct sk_buff *skb)
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{
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struct sk_buff *p;
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if (skb_bond_should_drop(skb))
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goto drop;
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skb->vlan_tci = vlan_tci;
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skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);
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if (!skb->dev)
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goto drop;
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for (p = napi->gro_list; p; p = p->next) {
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NAPI_GRO_CB(p)->same_flow =
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p->dev == skb->dev && !compare_ether_header(
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skb_mac_header(p), skb_gro_mac_header(skb));
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NAPI_GRO_CB(p)->flush = 0;
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}
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return dev_gro_receive(napi, skb);
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drop:
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return GRO_DROP;
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}
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int vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
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unsigned int vlan_tci, struct sk_buff *skb)
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{
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if (netpoll_rx_on(skb))
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return vlan_hwaccel_receive_skb(skb, grp, vlan_tci);
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skb_gro_reset_offset(skb);
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return napi_skb_finish(vlan_gro_common(napi, grp, vlan_tci, skb), skb);
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}
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EXPORT_SYMBOL(vlan_gro_receive);
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int vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
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unsigned int vlan_tci, struct napi_gro_fraginfo *info)
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{
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struct sk_buff *skb = napi_fraginfo_skb(napi, info);
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if (!skb)
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return NET_RX_DROP;
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if (netpoll_rx_on(skb)) {
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skb->protocol = eth_type_trans(skb, skb->dev);
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return vlan_hwaccel_receive_skb(skb, grp, vlan_tci);
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}
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return napi_frags_finish(napi, skb,
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vlan_gro_common(napi, grp, vlan_tci, skb));
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}
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EXPORT_SYMBOL(vlan_gro_frags);
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