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authorBen Hutchings <bhutchings@solarflare.com>2008-06-20 01:22:28 +0200
committerDavid S. Miller <davem@davemloft.net>2008-06-20 01:22:28 +0200
commit4497b0763cb1afae463f5e144c28b5d806e28b60 (patch)
tree3e86c53b5eb461eac7523885e43f36033cc03968 /net/core/skbuff.c
parentnet: Disable LRO on devices that are forwarding (diff)
downloadlinux-4497b0763cb1afae463f5e144c28b5d806e28b60.tar.xz
linux-4497b0763cb1afae463f5e144c28b5d806e28b60.zip
net: Discard and warn about LRO'd skbs received for forwarding
Add skb_warn_if_lro() to test whether an skb was received with LRO and warn if so. Change br_forward(), ip_forward() and ip6_forward() to call it) and discard the skb if it returns true. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/skbuff.c')
-rw-r--r--net/core/skbuff.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 3e18f8525e82..2df012be973d 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2583,6 +2583,13 @@ bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off)
return true;
}
+void __skb_warn_lro_forwarding(const struct sk_buff *skb)
+{
+ if (net_ratelimit())
+ pr_warning("%s: received packets cannot be forwarded"
+ " while LRO is enabled\n", skb->dev->name);
+}
+
EXPORT_SYMBOL(___pskb_trim);
EXPORT_SYMBOL(__kfree_skb);
EXPORT_SYMBOL(kfree_skb);
@@ -2616,6 +2623,7 @@ EXPORT_SYMBOL(skb_seq_read);
EXPORT_SYMBOL(skb_abort_seq_read);
EXPORT_SYMBOL(skb_find_text);
EXPORT_SYMBOL(skb_append_datato_frags);
+EXPORT_SYMBOL(__skb_warn_lro_forwarding);
EXPORT_SYMBOL_GPL(skb_to_sgvec);
EXPORT_SYMBOL_GPL(skb_cow_data);