vti: fix ipv4 pmtu check to honor ip header df

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Frag needed should only be sent if the header enables DF.

This fix allows packets larger than MTU to pass the vti interface
and be fragmented after encapsulation, aligning behavior with
non-vti xfrm.

Fixes: d6af1a31cc ("vti: Add pmtu handling to vti_xmit.")
Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

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Eyal Birger 2021-02-26 23:35:05 +02:00 • committed by Steffen Klassert

parent 8fc0e3b6a8

commit c7c1abfd6d

1 changed files with 4 additions and 2 deletions

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net/ipv4/ip_vti.c

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