• Jarno Rajahalme's avatar
    udp_offload: Set encapsulation before inner completes. · 229740c6
    Jarno Rajahalme authored
    UDP tunnel segmentation code relies on the inner offsets being set for
    an UDP tunnel GSO packet, but the inner *_complete() functions will
    set the inner offsets only if 'encapsulation' is set before calling
    them.  Currently, udp_gro_complete() sets 'encapsulation' only after
    the inner *_complete() functions are done.  This causes the inner
    offsets having invalid values after udp_gro_complete() returns, which
    in turn will make it impossible to properly segment the packet in case
    it needs to be forwarded, which would be visible to the user either as
    invalid packets being sent or as packet loss.
    
    This patch fixes this by setting skb's 'encapsulation' in
    udp_gro_complete() before calling into the inner complete functions,
    and by making each possible UDP tunnel gro_complete() callback set the
    inner_mac_header to the beginning of the tunnel payload.
    Signed-off-by: default avatarJarno Rajahalme <jarno@ovn.org>
    Reviewed-by: default avatarAlexander Duyck <aduyck@mirantis.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    229740c6
udp_offload.c 11.9 KB