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bonding: fix accounting of active ports in 3ad 

As of 7bb11dc9f5 and 0622cab034, bond slaves in a 3ad bond are not
removed from the aggregator when they are down, and the active slave count
is NOT equal to number of ports in the aggregator, but rather the number
of ports in the aggregator that are still enabled. The sysfs spew for
bonding_show_ad_num_ports() has a comment that says "Show number of active
802.3ad ports.", but it's currently showing total number of ports, both
active and inactive. Remedy it by using the same logic introduced in
0622cab034 in __bond_3ad_get_active_agg_info(), so sysfs, procfs and
netlink all report the number of active ports. Note that this means that
IFLA_BOND_AD_INFO_NUM_PORTS really means NUM_ACTIVE_PORTS instead of
NUM_PORTS, and thus perhaps should be renamed for clarity.

Lightly tested on a dual i40e lacp bond, simulating link downs with an ip
link set dev <slave2> down, was able to produce the state where I could
see both in the same aggregator, but a number of ports count of 1.

MII Status: up
Active Aggregator Info:
        Aggregator ID: 1
        Number of ports: 2 <---
Slave Interface: ens10
MII Status: up <---
Aggregator ID: 1
Slave Interface: ens11
MII Status: up
Aggregator ID: 1

MII Status: up
Active Aggregator Info:
        Aggregator ID: 1
        Number of ports: 1 <---
Slave Interface: ens10
MII Status: down <---
Aggregator ID: 1
Slave Interface: ens11
MII Status: up
Aggregator ID: 1

CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jarod Wilson 2017-05-19 19:43:45 -04:00 committed by David S. Miller
parent bd703a1524
commit 751da2a69b
1 changed files with 1 additions and 1 deletions
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2
drivers/net/bonding/bond_3ad.c
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@ -2577,7 +2577,7 @@ int __bond_3ad_get_active_agg_info(struct bonding *bond,
return -1;
ad_info->aggregator_id = aggregator->aggregator_identifier;
ad_info->ports = aggregator->num_of_ports;
ad_info->ports = __agg_active_ports(aggregator);
ad_info->actor_key = aggregator->actor_oper_aggregator_key;
ad_info->partner_key = aggregator->partner_oper_aggregator_key;
ether_addr_copy(ad_info->partner_system,