bonding: pair enable_port with slave_arr_updates

When 803.2ad mode enables a participating port, it should update
the slave-array. I have observed that the member links are participating
and are part of the active aggregator while the traffic is egressing via
only one member link (in a case where two links are participating). Via
kprobes I discovered that slave-arr has only one link added while
the other participating link wasn't part of the slave-arr.

I couldn't see what caused that situation but the simple code-walk
through provided me hints that the enable_port wasn't always associated
with the slave-array update.

Fixes: ee6377147409 ("bonding: Simplify the xmit function for modes that use xmit_hash")
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Link: https://lore.kernel.org/r/20220207222901.1795287-1-maheshb@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 6006c2e8fa2bcd46ca74f89277aab77867727ff6..9fd1d6cba3cdaa22df34a2a4e2cb0e85863f853b 100644 (file)
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -1021,8 +1021,8 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr)
                                if (port->aggregator &&
                                    port->aggregator->is_active &&
                                    !__port_is_enabled(port)) {
-
                                        __enable_port(port);
+                                       *update_slave_arr = true;
                                }
                        }
                        break;
@@ -1779,6 +1779,7 @@ static void ad_agg_selection_logic(struct aggregator *agg,
                             port = port->next_port_in_aggregator) {
                                __enable_port(port);
                        }
+                       *update_slave_arr = true;
                }
        }