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authorStephen Hemminger <shemminger@vyatta.com>2009-05-15 10:44:32 +0200
committerDavid S. Miller <davem@davemloft.net>2009-05-18 06:15:54 +0200
commit4cd6fe1c6483cde93e2ec91f58b7af9c9eea51ad (patch)
treec50f35af42e89e72a3c37847dffe3b25d3fdc60c /drivers
parentMerge branch 'linux-2.6.30.y' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff)
downloadlinux-4cd6fe1c6483cde93e2ec91f58b7af9c9eea51ad.tar.xz
linux-4cd6fe1c6483cde93e2ec91f58b7af9c9eea51ad.zip
bonding: fix link down handling in 802.3ad mode
One of the purposes of bonding is to allow for redundant links, and failover correctly if the cable is pulled. If all the members of a bonded device have no carrier present, the bonded device itself needs to report no carrier present to user space so management tools (like routing daemons) can respond. Bonding in 802.3ad mode does not work correctly for this because it incorrectly chooses a link that is down as a possible aggregator. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/bonding/bond_3ad.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 8c2e5ab51f08..faf094abef7f 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -1465,6 +1465,12 @@ static struct aggregator *ad_agg_selection_test(struct aggregator *best,
return best;
}
+static int agg_device_up(const struct aggregator *agg)
+{
+ return (netif_running(agg->slave->dev) &&
+ netif_carrier_ok(agg->slave->dev));
+}
+
/**
* ad_agg_selection_logic - select an aggregation group for a team
* @aggregator: the aggregator we're looking at
@@ -1496,14 +1502,13 @@ static void ad_agg_selection_logic(struct aggregator *agg)
struct port *port;
origin = agg;
-
active = __get_active_agg(agg);
- best = active;
+ best = (active && agg_device_up(active)) ? active : NULL;
do {
agg->is_active = 0;
- if (agg->num_of_ports)
+ if (agg->num_of_ports && agg_device_up(agg))
best = ad_agg_selection_test(best, agg);
} while ((agg = __get_next_agg(agg)));