net: openvswitch: introduce common code for flushing flows
To avoid some issues, for example RCU usage warning and double free, we should flush the flows under ovs_lock. This patch refactors table_instance_destroy and introduces table_instance_flow_flush which can be invoked by __dp_destroy or ovs_flow_tbl_flush. Fixes: 50b0e61b ("net: openvswitch: fix possible memleak on destroy flow-table") Reported-by:Johan Knöös <jknoos@google.com> Reported-at: https://mail.openvswitch.org/pipermail/ovs-discuss/2020-August/050489.html Signed-off-by:
Tonghao Zhang <xiangxia.m.yue@gmail.com> Reviewed-by:
Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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