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authorAmerigo Wang <amwang@redhat.com>2012-08-10 01:24:49 +0000
committerDavid S. Miller <davem@davemloft.net>2012-08-14 14:33:32 -0700
commit689971b44613883ee74ae9c1b31a864aaa3a8e17 (patch)
tree1c0544b1a44a4ba5f05461c697b565f67121b344 /net
parent6eacf8ad8d01c49b95b994b0bf379db2b5b29460 (diff)
netpoll: handle vlan tags in netpoll tx and rx path
Without this patch, I can't get netconsole logs remotely over vlan. The reason is probably we don't handle vlan tags in either netpoll tx or rx path. I am not sure if I use these vlan functions correctly, at least this patch works. Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Patrick McHardy <kaber@trash.net> Cc: David Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/netpoll.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 174346ac15a0..e4ba3e70c174 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -26,6 +26,7 @@
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/export.h>
+#include <linux/if_vlan.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <asm/unaligned.h>
@@ -334,6 +335,14 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
tries > 0; --tries) {
if (__netif_tx_trylock(txq)) {
if (!netif_xmit_stopped(txq)) {
+ if (vlan_tx_tag_present(skb) &&
+ !(netif_skb_features(skb) & NETIF_F_HW_VLAN_TX)) {
+ skb = __vlan_put_tag(skb, vlan_tx_tag_get(skb));
+ if (unlikely(!skb))
+ break;
+ skb->vlan_tci = 0;
+ }
+
status = ops->ndo_start_xmit(skb, dev);
if (status == NETDEV_TX_OK)
txq_trans_update(txq);
@@ -567,6 +576,12 @@ int __netpoll_rx(struct sk_buff *skb, struct netpoll_info *npinfo)
return 1;
}
+ if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {
+ skb = vlan_untag(skb);
+ if (unlikely(!skb))
+ goto out;
+ }
+
proto = ntohs(eth_hdr(skb)->h_proto);
if (proto != ETH_P_IP)
goto out;

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