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| author | Bruno Prémont <bonbons@linux-vserver.org> | 2009-04-29 20:45:17 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-05-01 15:24:18 -0700 |
| commit | 2382b15bcc39228572ccf1d9a1185dcabb84c833 (patch) | |
| tree | f24ff62a60da71984288f81ddbbc20476d18d063 /drivers/net/netconsole.c | |
| parent | acda074390270ca9e28f2a9729f7b835e2ad6da4 (diff) | |
| download | linux-3.10-2382b15bcc39228572ccf1d9a1185dcabb84c833.tar.gz linux-3.10-2382b15bcc39228572ccf1d9a1185dcabb84c833.tar.bz2 linux-3.10-2382b15bcc39228572ccf1d9a1185dcabb84c833.zip | |
netconsole: take care of NETDEV_UNREGISTER event
When netconsole is loaded and a network interface fades away (e.g. on
rmmod $interface_driver_module) the rmmod remains stuck and some locks
are taken that prevent any additional module loading/unloading as well
as interface up/down changes.
In addition kernel logs (and console) get flooded at 10s interval with
[ 122.464065] unregister_netdevice: waiting for eth0 to become free. Usage count = 1
[ 132.704059] unregister_netdevice: waiting for eth0 to become free. Usage count = 1
This patch lets netconsole take NETDEV_UNREGISTER event into account
and release the affected interface if it was in use.
Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netconsole.c')
| -rw-r--r-- | drivers/net/netconsole.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c index eceadf787a6..bf4af5248cb 100644 --- a/drivers/net/netconsole.c +++ b/drivers/net/netconsole.c @@ -664,7 +664,7 @@ static int netconsole_netdev_event(struct notifier_block *this, struct netconsole_target *nt; struct net_device *dev = ptr; - if (!(event == NETDEV_CHANGENAME)) + if (!(event == NETDEV_CHANGENAME || event == NETDEV_UNREGISTER)) goto done; spin_lock_irqsave(&target_list_lock, flags); @@ -675,6 +675,15 @@ static int netconsole_netdev_event(struct notifier_block *this, case NETDEV_CHANGENAME: strlcpy(nt->np.dev_name, dev->name, IFNAMSIZ); break; + case NETDEV_UNREGISTER: + if (!nt->enabled) + break; + netpoll_cleanup(&nt->np); + nt->enabled = 0; + printk(KERN_INFO "netconsole: network logging stopped" + ", interface %s unregistered\n", + dev->name); + break; } } netconsole_target_put(nt); |