linux-kernel - [PATCH 3.16.y-ckt 011/180] bonding: Bonding Overriding Configuration logic restored.

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Message-Id: <1430991989-23170-12-git-send-email-luis.henriques@canonical.com>
Date:	Thu,  7 May 2015 10:43:40 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Anton Nayshtut <anton@...rtex.com>,
	Alexey Bogoslavsky <alexey@...rtex.com>,
	Andy Gospodarek <gospo@...ulusnetworks.com>,
	"David S. Miller" <davem@...emloft.net>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 011/180] bonding: Bonding Overriding Configuration logic restored.

3.16.7-ckt11 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Anton Nayshtut <anton@...rtex.com>

commit f5e2dc5d7fe78fe4d8748d217338f4f7b6a5d7ea upstream.

Before commit 3900f29021f0bc7fe9815aa32f1a993b7dfdd402 ("bonding: slight
optimizztion for bond_slave_override()") the override logic was to send packets
with non-zero queue_id through the slave with corresponding queue_id, under two
conditions only - if the slave can transmit and it's up.

The above mentioned commit changed this logic by introducing an additional
condition - whether the bond is active (indirectly, using the slave_can_tx and
later - bond_is_active_slave), that prevents the user from implementing more
complex policies according to the Documentation/networking/bonding.txt.

Signed-off-by: Anton Nayshtut <anton@...rtex.com>
Signed-off-by: Alexey Bogoslavsky <alexey@...rtex.com>
Signed-off-by: Andy Gospodarek <gospo@...ulusnetworks.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/net/bonding/bond_main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 6c795cfd6bbc..14faf3ec7c7f 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3763,7 +3763,8 @@ static inline int bond_slave_override(struct bonding *bond,
 	/* Find out if any slaves have the same mapping as this skb. */
 	bond_for_each_slave_rcu(bond, slave, iter) {
 		if (slave->queue_id == skb->queue_mapping) {
-			if (bond_slave_can_tx(slave)) {
+			if (bond_slave_is_up(slave) &&
+			    slave->link == BOND_LINK_UP) {
 				bond_dev_queue_xmit(bond, skb, slave->dev);
 				return 0;
 			}
--
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