netdev - [PATCH net-next v5] switchdev: fix stp update API to work with layered netdevices

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 20 Mar 2015 22:20:32 -0700
From:	roopa@...ulusnetworks.com
To:	davem@...emloft.net, sfeldma@...il.com, jiri@...nulli.us
Cc:	netdev@...r.kernel.org
Subject: [PATCH net-next v5] switchdev: fix stp update API to work with layered netdevices

From: Roopa Prabhu <roopa@...ulusnetworks.com>

make it same as the netdev_switch_port_bridge_setlink/dellink
api (ie traverse lowerdevs to get to the switch port).

removes "WARN_ON(!ops->ndo_switch_parent_id_get)" because
direct bridge ports can be stacked netdevices (like bonds
and team of switch ports) which may not implement this ndo.

v2 to v3:
	- remove changes to bond and team. Bring back the
	transparently following lowerdevs like i initially
	had for setlink/getlink
	(http://www.spinics.net/lists/netdev/msg313436.html)
	dave and scott feldman also seem to prefer it be that
	way and move to non-transparent way of doing things
	if we see a problem down the lane.

v3 to v4:
	- fix ret initialization

v4 to v5:
	- return err on first failure (scott feldman)

Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
---
 net/switchdev/switchdev.c |   17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index c9bfa00..7d7b487 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -47,11 +47,20 @@ EXPORT_SYMBOL_GPL(netdev_switch_parent_id_get);
 int netdev_switch_port_stp_update(struct net_device *dev, u8 state)
 {
 	const struct swdev_ops *ops = dev->swdev_ops;
+	struct net_device *lower_dev;
+	struct list_head *iter;
+	int ret;
 
-	if (!ops || !ops->swdev_port_stp_update)
-		return -EOPNOTSUPP;
-	WARN_ON(!ops->swdev_parent_id_get);
-	return ops->swdev_port_stp_update(dev, state);
+	if (ops && ops->swdev_port_stp_update)
+		return ops->swdev_port_stp_update(dev, state);
+
+	netdev_for_each_lower_dev(dev, lower_dev, iter) {
+		ret = netdev_switch_port_stp_update(lower_dev, state);
+		if (ret && ret != -EOPNOTSUPP)
+			return ret;
+	}
+
+	return 0;
 }
 EXPORT_SYMBOL_GPL(netdev_switch_port_stp_update);
 
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html