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skbuff: introduce skb_gso_validate_mtu

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skb_gso_network_seglen is not enough for checking fragment sizes if
skb is using GSO_BY_FRAGS as we have to check frag per frag.

This patch introduces skb_gso_validate_mtu, based on the former, which
will wrap the use case inside it as all calls to skb_gso_network_seglen
were to validate if it fits on a given TMU, and improve the check.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcelo Ricardo Leitner
2016-06-02 15:05:41 -03:00
committed by David S. Miller
parent 3953c46c3a
commit ae7ef81ef0
6 changed files with 36 additions and 4 deletions
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2
net/mpls/af_mpls.c
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@@ -91,7 +91,7 @@ bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu)
if (skb->len <= mtu)
return false;
if (skb_is_gso(skb) && skb_gso_network_seglen(skb) <= mtu)
if (skb_is_gso(skb) && skb_gso_validate_mtu(skb, mtu))
return false;
return true;