datapath: ip6_gre: fix tunnel metadata device sharing.

commit b80d0b93b991e551a32157e0d9d38fc5bc9348a7
Author: William Tu <u9012063@gmail.com>
Date:   Fri May 18 19:22:28 2018 -0700

    net: ip6_gre: fix tunnel metadata device sharing.

    Currently ip6gre and ip6erspan share single metadata mode device,
    using 'collect_md_tun'.  Thus, when doing:
      ip link add dev ip6gre11 type ip6gretap external
      ip link add dev ip6erspan12 type ip6erspan external
      RTNETLINK answers: File exists
    simply fails due to the 2nd tries to create the same collect_md_tun.

    The patch fixes it by adding a separate collect md tunnel device
    for the ip6erspan, 'collect_md_tun_erspan'.  As a result, a couple
    of places need to refactor/split up in order to distinguish ip6gre
    and ip6erspan.

    First, move the collect_md check at ip6gre_tunnel_{unlink,link} and
    create separate function {ip6gre,ip6ersapn}_tunnel_{link_md,unlink_md}.
    Then before link/unlink, make sure the link_md/unlink_md is called.
    Finally, a separate ndo_uninit is created for ip6erspan.  Tested it
    using the samples/bpf/test_tunnel_bpf.sh.

    Fixes: ef7baf5e083c ("ip6_gre: add ip6 erspan collect_md mode")
    Signed-off-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