From 8d8fc29d02a33e4bd5f4fa47823c1fd386346093 Mon Sep 17 00:00:00 2001 From: Amerigo Wang Date: Thu, 19 May 2011 21:39:10 +0000 Subject: netpoll: disable netpoll when enslave a device V3: rename NETDEV_ENSLAVE to NETDEV_JOIN Currently we do nothing when we enslave a net device which is running netconsole. Neil pointed out that we may get weird results in such case, so let's disable netpoll on the device being enslaved. I think it is too harsh to prevent the device being ensalved if it is running netconsole. By the way, this patch also removes the NETDEV_GOING_DOWN from netconsole netdev notifier, because netpoll will check if the device is running or not and we don't handle NETDEV_PRE_UP neither. This patch is based on net-next-2.6. Signed-off-by: WANG Cong Cc: Neil Horman Signed-off-by: David S. Miller --- drivers/net/netconsole.c | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-) (limited to 'drivers/net/netconsole.c') diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c index a83e101440fd..4190786de403 100644 --- a/drivers/net/netconsole.c +++ b/drivers/net/netconsole.c @@ -621,11 +621,10 @@ static int netconsole_netdev_event(struct notifier_block *this, bool stopped = false; if (!(event == NETDEV_CHANGENAME || event == NETDEV_UNREGISTER || - event == NETDEV_BONDING_DESLAVE || event == NETDEV_GOING_DOWN)) + event == NETDEV_BONDING_DESLAVE || event == NETDEV_JOIN)) goto done; spin_lock_irqsave(&target_list_lock, flags); -restart: list_for_each_entry(nt, &target_list, list) { netconsole_target_get(nt); if (nt->np.dev == dev) { @@ -633,6 +632,8 @@ restart: case NETDEV_CHANGENAME: strlcpy(nt->np.dev_name, dev->name, IFNAMSIZ); break; + case NETDEV_BONDING_DESLAVE: + case NETDEV_JOIN: case NETDEV_UNREGISTER: /* * rtnl_lock already held @@ -647,11 +648,7 @@ restart: dev_put(nt->np.dev); nt->np.dev = NULL; netconsole_target_put(nt); - goto restart; } - /* Fall through */ - case NETDEV_GOING_DOWN: - case NETDEV_BONDING_DESLAVE: nt->enabled = 0; stopped = true; break; @@ -660,10 +657,21 @@ restart: netconsole_target_put(nt); } spin_unlock_irqrestore(&target_list_lock, flags); - if (stopped && (event == NETDEV_UNREGISTER || event == NETDEV_BONDING_DESLAVE)) + if (stopped) { printk(KERN_INFO "netconsole: network logging stopped on " - "interface %s as it %s\n", dev->name, - event == NETDEV_UNREGISTER ? "unregistered" : "released slaves"); + "interface %s as it ", dev->name); + switch (event) { + case NETDEV_UNREGISTER: + printk(KERN_CONT "unregistered\n"); + break; + case NETDEV_BONDING_DESLAVE: + printk(KERN_CONT "released slaves\n"); + break; + case NETDEV_JOIN: + printk(KERN_CONT "is joining a master device\n"); + break; + } + } done: return NOTIFY_DONE; -- cgit v1.2.3-59-g8ed1b