netdev - Re: [PATCH net-next v3] bonding: 802.3ad replace MAC_ADDRESS_EQUAL with __agg_has

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Message-ID: <16063.1708987620@famine>
Date: Mon, 26 Feb 2024 14:47:00 -0800
From: Jay Vosburgh <jay.vosburgh@...onical.com>
To: =?iso-2022-jp?B?Sm9uZXMgU3l1ZSAbJEJpLVhnPSEbKEI=?= <jonessyue@...p.com>
cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
    "andy@...yhouse.net" <andy@...yhouse.net>,
    "davem@...emloft.net" <davem@...emloft.net>,
    "edumazet@...gle.com" <edumazet@...gle.com>,
    Jakub Kicinski <kuba@...nel.org>,
    "pabeni@...hat.com" <pabeni@...hat.com>,
    "corbet@....net" <corbet@....net>, Jiri Pirko <jiri@...nulli.us>,
    "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
    "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next v3] bonding: 802.3ad replace MAC_ADDRESS_EQUAL with __agg_has_partner

Jones Syue 薛懷宗 <jonessyue@...p.com> wrote:

>Replace macro MAC_ADDRESS_EQUAL() for null_mac_addr checking with inline
>function__agg_has_partner(). When MAC_ADDRESS_EQUAL() is verifiying
>aggregator's partner mac addr with null_mac_addr, means that seeing if
>aggregator has a valid partner or not. Using __agg_has_partner() makes it
>more clear to understand.
>
>In ad_port_selection_logic(), since aggregator->partner_system and
>port->partner_oper.system has been compared first as a prerequisite, it is
>safe to replace the upcoming MAC_ADDRESS_EQUAL() for null_mac_addr checking
>with __agg_has_partner().

	Ok, I missed this bit when I read the patch this morning, so you
can ignore my earlier email's question.  Patch looks good to me, glad to
see null_mac_addr get the boot.

>Delete null_mac_addr, which is not required anymore in bond_3ad.c, since
>all references to it are gone.
>
>Signed-off-by: Jones Syue <jonessyue@...p.com>

Acked-by: Jay Vosburgh <jay.vosburgh@...onical.com>

	-J

>---
>v3:
>  - replace macro with inline function in ad_port_selection_logic()
>  - delete static variable null_mac_addr in bond_3ad.c
>  - re-phrase patch description with more precise text
>  - re-phrase patch description in imperative mood
>v2: https://lore.kernel.org/netdev/SI2PR04MB5097AA23EE6799B3E56C0762DC552@SI2PR04MB5097.apcprd04.prod.outlook.com/
>  - add correct CC list by 'get_maintainer.pl -f .../bonding.rst'
>v1: https://lore.kernel.org/netdev/SI2PR04MB50977DA9BB51D9C8FAF6928ADC562@SI2PR04MB5097.apcprd04.prod.outlook.com/
>---
> drivers/net/bonding/bond_3ad.c | 14 +++-----------
> 1 file changed, 3 insertions(+), 11 deletions(-)
>
>diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
>index f2942e8c6c91..c6807e473ab7 100644
>--- a/drivers/net/bonding/bond_3ad.c
>+++ b/drivers/net/bonding/bond_3ad.c
>@@ -82,10 +82,6 @@ enum ad_link_speed_type {
> #define MAC_ADDRESS_EQUAL(A, B)	\
> 	ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
> 
>-static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
>-	0, 0, 0, 0, 0, 0
>-};
>-
> static const u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL;
> static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
> 
>@@ -1588,7 +1584,7 @@ static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
> 		     (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
> 		     (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
> 		    ) &&
>-		    ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
>+		    ((__agg_has_partner(aggregator) && /* partner answers */
> 		      !aggregator->is_individual)  /* but is not individual OR */
> 		    )
> 		   ) {
>@@ -2036,9 +2032,7 @@ static void ad_enable_collecting(struct port *port)
>  */
> static void ad_disable_distributing(struct port *port, bool *update_slave_arr)
> {
>-	if (port->aggregator &&
>-	    !MAC_ADDRESS_EQUAL(&port->aggregator->partner_system,
>-			       &(null_mac_addr))) {
>+	if (port->aggregator && __agg_has_partner(port->aggregator)) {
> 		slave_dbg(port->slave->bond->dev, port->slave->dev,
> 			  "Disabling distributing on port %d (LAG %d)\n",
> 			  port->actor_port_number,
>@@ -2078,9 +2072,7 @@ static void ad_enable_collecting_distributing(struct port *port,
> static void ad_disable_collecting_distributing(struct port *port,
> 					       bool *update_slave_arr)
> {
>-	if (port->aggregator &&
>-	    !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
>-			       &(null_mac_addr))) {
>+	if (port->aggregator && __agg_has_partner(port->aggregator)) {
> 		slave_dbg(port->slave->bond->dev, port->slave->dev,
> 			  "Disabling port %d (LAG %d)\n",
> 			  port->actor_port_number,
>-- 
>2.1.4
>