datapath: ip6_gre: Fix ip6erspan hlen calculation

commit 2d665034f239412927b1e71329f20f001c92da09
Author: Petr Machata <petrm@mellanox.com>
Date:   Thu May 17 16:36:51 2018 +0200

    net: ip6_gre: Fix ip6erspan hlen calculation

    Even though ip6erspan_tap_init() sets up hlen and tun_hlen according to
    what ERSPAN needs, it goes ahead to call ip6gre_tnl_link_config() which
    overwrites these settings with GRE-specific ones.

    Similarly for changelink callbacks, which are handled by
    ip6gre_changelink() calls ip6gre_tnl_change() calls
    ip6gre_tnl_link_config() as well.

    The difference ends up being 12 vs. 20 bytes, and this is generally not
    a problem, because a 12-byte request likely ends up allocating more and
    the extra 8 bytes are thus available. However correct it is not.

    So replace the newlink and changelink callbacks with an ERSPAN-specific
    ones, reusing the newly-introduced _common() functions.

    Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support")
    Signed-off-by: Petr Machata <petrm@mellanox.com>
    Acked-by: William Tu <u9012063@gmail.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

Cc: Greg Rose <gvrose8192@gmail.com>
Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
Reviewed-by: Greg Rose <gvrose8192@gmail.com>
Tested-by: Greg Rose <gvrose8192@gmail.com>

0 files changed, 0 insertions, 0 deletions