netdev - Re: [PATCH net-next] bonding: BOND_MONITOR

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Date:	Mon, 30 Mar 2015 09:37:45 -0700
From:	Mahesh Bandewar <maheshb@...gle.com>
To:	Andy Gospodarek <gospo@...ulusnetworks.com>
Cc:	Jay Vosburgh <j.vosburgh@...il.com>,
	Andy Gospodarek <andy@...yhouse.net>,
	Veaceslav Falico <vfalico@...il.com>,
	Nikolay Aleksandrov <nikolay@...hat.com>,
	David Miller <davem@...emloft.net>,
	Maciej Zenczykowski <maze@...gle.com>,
	netdev <netdev@...r.kernel.org>,
	Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH net-next] bonding: BOND_MONITOR_CHURNED is a port variable

On Mon, Mar 30, 2015 at 8:26 AM, Andy Gospodarek
<gospo@...ulusnetworks.com> wrote:
> On Fri, Mar 27, 2015 at 10:18:13PM -0700, Mahesh Bandewar wrote:
>> It's a trivial change to assign the correct value for this Churn-machine
>> state. This is actually a port variable and hence assigning some arbitrary
>> value might be error prone.
>
> I am looking at 802.1AX-2008 and I do not see this value defined in
> 5.4.8 ("Variables used for managing the operation of the state
> machines").  What specification were you looking at that had a 'port
> churned' (or similar) state mentioned?
>
It's a combination of "actor_churn" + "partner_churn". Since the
verbose form AD_PORT_ACTOR_PARTNER_CHURNED would be long, decided to
shorten it.


If we consider churn-machine-state as part of the LACP state machine,
>>
>> Signed-off-by: Mahesh Bandewar <maheshb@...gle.com>
>> ---
>>  drivers/net/bonding/bond_3ad.c | 12 ++++++------
>>  1 file changed, 6 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
>> index b8444746521f..3cce25818b57 100644
>> --- a/drivers/net/bonding/bond_3ad.c
>> +++ b/drivers/net/bonding/bond_3ad.c
>> @@ -38,7 +38,6 @@
>>  #define AD_STANDBY                 0x2
>>  #define AD_MAX_TX_IN_SECOND        3
>>  #define AD_COLLECTOR_MAX_DELAY     0
>> -#define AD_MONITOR_CHURNED         0x1000
>>
>>  /* Timer definitions (43.4.4 in the 802.3ad standard) */
>>  #define AD_FAST_PERIODIC_TIME      1
>> @@ -71,6 +70,7 @@
>>  #define AD_PORT_STANDBY         0x80
>>  #define AD_PORT_SELECTED        0x100
>>  #define AD_PORT_MOVED           0x200
>> +#define AD_PORT_CHURNED         0x400
>>
>>  /* Port Key definitions
>>   * key is determined according to the link speed, duplex and
>> @@ -1016,7 +1016,7 @@ static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
>>       /* first, check if port was reinitialized */
>>       if (port->sm_vars & AD_PORT_BEGIN) {
>>               port->sm_rx_state = AD_RX_INITIALIZE;
>> -             port->sm_vars |= AD_MONITOR_CHURNED;
>> +             port->sm_vars |= AD_PORT_CHURNED;
>>       /* check if port is not enabled */
>>       } else if (!(port->sm_vars & AD_PORT_BEGIN)
>>                && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
>> @@ -1026,7 +1026,7 @@ static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
>>                (port->sm_rx_state == AD_RX_DEFAULTED) ||
>>                (port->sm_rx_state == AD_RX_CURRENT))) {
>>               if (port->sm_rx_state != AD_RX_CURRENT)
>> -                     port->sm_vars |= AD_MONITOR_CHURNED;
>> +                     port->sm_vars |= AD_PORT_CHURNED;
>>               port->sm_rx_timer_counter = 0;
>>               port->sm_rx_state = AD_RX_CURRENT;
>>       } else {
>> @@ -1108,7 +1108,7 @@ static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
>>                       port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
>>                       port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
>>                       port->actor_oper_port_state |= AD_STATE_EXPIRED;
>> -                     port->sm_vars |= AD_MONITOR_CHURNED;
>> +                     port->sm_vars |= AD_PORT_CHURNED;
>>                       break;
>>               case AD_RX_DEFAULTED:
>>                       __update_default_selected(port);
>> @@ -1144,8 +1144,8 @@ static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
>>   */
>>  static void ad_churn_machine(struct port *port)
>>  {
>> -     if (port->sm_vars & AD_MONITOR_CHURNED) {
>> -             port->sm_vars &= ~AD_MONITOR_CHURNED;
>> +     if (port->sm_vars & AD_PORT_CHURNED) {
>> +             port->sm_vars &= ~AD_PORT_CHURNED;
>>               port->sm_churn_actor_state = AD_CHURN_MONITOR;
>>               port->sm_churn_partner_state = AD_CHURN_MONITOR;
>>               port->sm_churn_actor_timer_counter =
>> --
>> 2.2.0.rc0.207.ga3a616c
>>
>> --
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