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datapath: Fix L4 checksum handling when dealing with IP fragments
openvswitch modifies the L4 checksum of a packet when modifying the ip address. When an IP packet is fragmented only the first fragment contains an L4 header and checksum. Prior to this change openvswitch would modify all fragments, modifying application data in non-first fragments, causing checksum failures in the reassembled packet. Signed-off-by: Glenn Griffin <ggriffin.kernel@gmail.com> Acked-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net> Upstream: 3576fd794b3 ("openvswitch: Fix L4 checksum handling when dealing with IP fragments"). Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
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