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mlxsw: spectrum_span: Change LAG lower selection

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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.

So instead of checking upness of the device, check carrier state and
txability.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2018-07-10 10:02:59 +03:00 committed by David S. Miller
parent eeed992b77
commit b5de82f3df
1 changed files with 4 additions and 1 deletions
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5
drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
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@ -36,6 +36,7 @@
#include <linux/list.h>
#include <net/arp.h>
#include <net/gre.h>
#include <net/lag.h>
#include <net/ndisc.h>
#include <net/ip6_tunnel.h>
@ -254,7 +255,9 @@ mlxsw_sp_span_entry_lag(struct net_device *lag_dev)
struct list_head *iter;
netdev_for_each_lower_dev(lag_dev, dev, iter)
if ((dev->flags & IFF_UP) && mlxsw_sp_port_dev_check(dev))
if (netif_carrier_ok(dev) &&
net_lag_port_dev_txable(dev) &&
mlxsw_sp_port_dev_check(dev))
return dev;
return NULL;