From: Wilson Kok Date: Mon, 26 Jan 2015 06:16:59 +0000 (-0500) Subject: bonding: fix incorrect lacp mux state when agg not active X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=63b46242f707849a1df10b70e026281bfa40e849;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git bonding: fix incorrect lacp mux state when agg not active This patch attempts to fix the following problems when an actor or partner's aggregator is not active: 1. a slave's lacp port state is marked as AD_STATE_SYNCHRONIZATION even if it is attached to an inactive aggregator. LACP advertises this state to the partner, making the partner think he can move into COLLECTING_DISTRIBUTING state even though this link will not pass traffic on the local side 2. a slave goes into COLLECTING_DISTRIBUTING state without checking if the aggregator is actually active 3. when in COLLECTING_DISTRIBUTING state, the partner parameters may change, e.g. the partner_oper_port_state.SYNCHRONIZATION. The local mux machine is not reacting to the change and continue to keep the slave and bond up 4. When bond slave leaves an inactive aggregator and joins an active aggregator, the actor oper port state need to update to SYNC state. v2: * fix style issues in bond_3ad.c Cc: Andy Gospodarek Reviewed-by: Nikolay Aleksandrov Signed-off-by: Wilson Kok Signed-off-by: Jonathan Toppins Signed-off-by: David S. Miller --- diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c index 8baa87df1738..e3c96b216eb8 100644 --- a/drivers/net/bonding/bond_3ad.c +++ b/drivers/net/bonding/bond_3ad.c @@ -467,11 +467,14 @@ static void __record_pdu(struct lacpdu *lacpdu, struct port *port) /* set the partner sync. to on if the partner is sync, * and the port is matched */ - if ((port->sm_vars & AD_PORT_MATCHED) - && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) + if ((port->sm_vars & AD_PORT_MATCHED) && + (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { partner->port_state |= AD_STATE_SYNCHRONIZATION; - else + pr_debug("%s partner sync=1\n", port->slave->dev->name); + } else { partner->port_state &= ~AD_STATE_SYNCHRONIZATION; + pr_debug("%s partner sync=0\n", port->slave->dev->name); + } } } @@ -726,6 +729,8 @@ static inline void __update_lacpdu_from_port(struct port *port) lacpdu->actor_port_priority = htons(port->actor_port_priority); lacpdu->actor_port = htons(port->actor_port_number); lacpdu->actor_state = port->actor_oper_port_state; + pr_debug("update lacpdu: %s, actor port state %x\n", + port->slave->dev->name, port->actor_oper_port_state); /* lacpdu->reserved_3_1 initialized * lacpdu->tlv_type_partner_info initialized @@ -898,7 +903,9 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr) if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { - port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING; + if (port->aggregator->is_active) + port->sm_mux_state = + AD_MUX_COLLECTING_DISTRIBUTING; } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { /* if UNSELECTED or STANDBY */ @@ -910,12 +917,16 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr) */ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); port->sm_mux_state = AD_MUX_DETACHED; + } else if (port->aggregator->is_active) { + port->actor_oper_port_state |= + AD_STATE_SYNCHRONIZATION; } break; case AD_MUX_COLLECTING_DISTRIBUTING: if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || - !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)) { + !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || + !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { port->sm_mux_state = AD_MUX_ATTACHED; } else { /* if port state hasn't changed make @@ -937,8 +948,10 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr) /* check if the state machine was changed */ if (port->sm_mux_state != last_state) { - pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", - port->actor_port_number, last_state, + pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", + port->actor_port_number, + port->slave->dev->name, + last_state, port->sm_mux_state); switch (port->sm_mux_state) { case AD_MUX_DETACHED: @@ -953,7 +966,12 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr) port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); break; case AD_MUX_ATTACHED: - port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; + if (port->aggregator->is_active) + port->actor_oper_port_state |= + AD_STATE_SYNCHRONIZATION; + else + port->actor_oper_port_state &= + ~AD_STATE_SYNCHRONIZATION; port->actor_oper_port_state &= ~AD_STATE_COLLECTING; port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; ad_disable_collecting_distributing(port, @@ -963,6 +981,7 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr) case AD_MUX_COLLECTING_DISTRIBUTING: port->actor_oper_port_state |= AD_STATE_COLLECTING; port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; + port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; ad_enable_collecting_distributing(port, update_slave_arr); port->ntt = true; @@ -1044,8 +1063,10 @@ static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) /* check if the State machine was changed or new lacpdu arrived */ if ((port->sm_rx_state != last_state) || (lacpdu)) { - pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", - port->actor_port_number, last_state, + pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", + port->actor_port_number, + port->slave->dev->name, + last_state, port->sm_rx_state); switch (port->sm_rx_state) { case AD_RX_INITIALIZE: @@ -1394,6 +1415,9 @@ static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) aggregator = __get_first_agg(port); ad_agg_selection_logic(aggregator, update_slave_arr); + + if (!port->aggregator->is_active) + port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; } /* Decide if "agg" is a better choice for the new active aggregator that