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| author |   Stefano Brivio <sbrivio@redhat.com> | 2018-10-12 23:53:59 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-10-17 21:51:13 -0700 |
| commit | 6b4f92af3d59e882d3ba04c44a815266890d188f (patch) | |
| tree | 8446305611f6d7e76b1470f1ca91f8bdb822b7bf /include/net/dst.h | |
| parent | geneve, vxlan: Don't check skb_dst() twice (diff) | |
| download | linux-dev-6b4f92af3d59e882d3ba04c44a815266890d188f.tar.xz linux-dev-6b4f92af3d59e882d3ba04c44a815266890d188f.zip | |
geneve, vxlan: Don't set exceptions if skb->len < mtu
We shouldn't abuse exceptions: if the destination MTU is already higher
than what we're transmitting, no exception should be created.
Fixes: 52a589d51f10 ("geneve: update skb dst pmtu on tx path")
Fixes: a93bf0ff4490 ("vxlan: update skb dst pmtu on tx path")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/dst.h')
| -rw-r--r-- | include/net/dst.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/net/dst.h b/include/net/dst.h index 7f735e76ca73..6cf0870414c7 100644 --- a/include/net/dst.h +++ b/include/net/dst.h @@ -527,4 +527,14 @@ static inline void skb_dst_update_pmtu(struct sk_buff *skb, u32 mtu) dst->ops->update_pmtu(dst, NULL, skb, mtu); } +static inline void skb_tunnel_check_pmtu(struct sk_buff *skb, + struct dst_entry *encap_dst, + int headroom) +{ + u32 encap_mtu = dst_mtu(encap_dst); + + if (skb->len > encap_mtu - headroom) + skb_dst_update_pmtu(skb, encap_mtu - headroom); +} + #endif /* _NET_DST_H */ |