linux-kernel - [PATCH 1/2] bonding: Manage /proc/net/bonding/ entries from the netdev events

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Message-ID: <87y5ms3bfi.fsf_-_@xmission.com>
Date:	Mon, 09 Jul 2012 13:51:45 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	David Miller <davem@...emloft.net>
Cc:	Dilip Daya <dilip.daya@...com>, linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org, netdev@...r.kernel.org,
	"Serge E. Hallyn" <serge@...lyn.com>
Subject: [PATCH 1/2] bonding: Manage /proc/net/bonding/ entries from the netdev events


It was recently reported that moving a bonding device between network
namespaces causes warnings from /proc.  It turns out after the move we
were trying to add and to remove the /proc/net/bonding entries from the
wrong network namespace.

Move the bonding /proc registration code into the NETDEV_REGISTER and
NETDEV_UNREGISTER events where the proc registration and unregistration
will always happen at the right time.

Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
 drivers/net/bonding/bond_main.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 2ee8cf9..50de0fe 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3226,6 +3226,12 @@ static int bond_master_netdev_event(unsigned long event,
 	switch (event) {
 	case NETDEV_CHANGENAME:
 		return bond_event_changename(event_bond);
+	case NETDEV_UNREGISTER:
+		bond_remove_proc_entry(event_bond);
+		break;
+	case NETDEV_REGISTER:
+		bond_create_proc_entry(event_bond);
+		break;
 	default:
 		break;
 	}
@@ -4410,8 +4416,6 @@ static void bond_uninit(struct net_device *bond_dev)
 
 	bond_work_cancel_all(bond);
 
-	bond_remove_proc_entry(bond);
-
 	bond_debug_unregister(bond);
 
 	__hw_addr_flush(&bond->mc_list);
@@ -4813,7 +4817,6 @@ static int bond_init(struct net_device *bond_dev)
 
 	bond_set_lockdep_class(bond_dev);
 
-	bond_create_proc_entry(bond);
 	list_add_tail(&bond->bond_list, &bn->dev_list);
 
 	bond_prepare_sysfs_group(bond);
-- 
1.7.5.4

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