Petr says: When offloading mirror-to-gretap, mlxsw needs to preroute the path that the encapsulated packet will take. That path may include a LAG device above a front panel port. So far, mlxsw resolved the path to the first up front panel slave of the LAG interface, but that only reflects administrative state of the port. It neglects to consider whether the port actually has a carrier, and what the LACP state is. This patch set aims to address these problems.
Patch #1 publishes team_port_get_rcu(). Then in patch #2, a new function is introduced, mlxsw_sp_port_dev_check(). That returns, for a given netdevice that is a slave of a LAG device, whether that device is "txable", i.e. whether the LAG master would send traffic through it. Since there's no good place to put LAG-wide helpers, introduce a new header include/net/lag.h. Finally in patch #3, fix the slave selection logic to take into consideration whether a given slave has a carrier and whether it is txable. Petr Machata (3): team: Publish team_port_get_rcu() net: Add lag.h, net_lag_port_dev_txable() mlxsw: spectrum_span: Change LAG lower selection drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c | 5 ++++- drivers/net/team/team.c | 5 ----- include/linux/if_team.h | 18 ++++++++++++++++++ include/net/bonding.h | 13 +++++++++++++ include/net/lag.h | 17 +++++++++++++++++ 5 files changed, 52 insertions(+), 6 deletions(-) create mode 100644 include/net/lag.h -- 2.14.4
