Mon, Feb 04, 2019 at 01:32:50PM CET, vla...@mellanox.com wrote: >When cls API is called without protection of rtnl lock, parallel >modification of chain is possible, which means that chain template can be >changed concurrently in certain circumstances. For example, when chain is >'deleted' by new user-space chain API, the chain might continue to be used >if it is referenced by actions, and can be 're-created' again by user. In >such case same chain structure is reused and its template is changed. To >protect from described scenario, cache chain template while holding block >lock. Introduce standalone tc_chain_notify_delete() function that works >with cached template values, instead of chains themselves. > >Signed-off-by: Vlad Buslov <vla...@mellanox.com>
Acked-by: Jiri Pirko <j...@mellanox.com>
