netdev - Re: sysfs class/net/ problem

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Message-ID: <20100602154608.GB12361@kroah.com>
Date:	Wed, 2 Jun 2010 08:46:08 -0700
From:	Greg KH <greg@...ah.com>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	netdev <netdev@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: sysfs class/net/ problem

On Wed, Jun 02, 2010 at 03:16:51PM +0200, Johannes Berg wrote:
> Hi,
> 
> I didn't find anything related in the archives, if I missed it I'd
> appreciate a pointer. I'm currently experiencing the following:
> 
> # ip link
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
>     link/ether 52:54:00:12:34:56 brd ff:ff:ff:ff:ff:ff
> # ls -l /sys/class/net/
> total 0
> lrwxrwxrwx 1 root root 0 Jun  2 13:12 eth0 -> ../../devices/pci0000:00/0000:00:03.0/net/eth0
> lrwxrwxrwx 1 root root 0 Jun  2 13:12 lo -> ../../devices/virtual/net/lo
> # insmod cfg80211.ko ; insmod mac80211.ko ; insmod mac80211_hwsim.ko  radios=3 
> # ip link
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
>     link/ether 52:54:00:12:34:56 brd ff:ff:ff:ff:ff:ff
> 5: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
>     link/ether 02:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
> 6: wlan1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
>     link/ether 02:00:00:00:01:00 brd ff:ff:ff:ff:ff:ff
> 7: wlan2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
>     link/ether 02:00:00:00:02:00 brd ff:ff:ff:ff:ff:ff
> 8: hwsim0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN 
>     link/ieee802.11/radiotap 12:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
> # ls -l /sys/class/net/
> total 0
> lrwxrwxrwx 1 root root 0 Jun  2 13:12 eth0 -> ../../devices/pci0000:00/0000:00:03.0/net/eth0
> lrwxrwxrwx 1 root root 0 Jun  2 13:14 hwsim0 -> ../../devices/virtual/net/hwsim0
> lrwxrwxrwx 1 root root 0 Jun  2 13:12 lo -> ../../devices/virtual/net/lo
> lrwxrwxrwx 1 root root 0 Jun  2 13:14 wlan0 -> ../../devices/virtual/mac80211_hwsim/hwsim0/wlan0
> lrwxrwxrwx 1 root root 0 Jun  2 13:14 wlan1 -> ../../devices/virtual/mac80211_hwsim/hwsim1/wlan1
> lrwxrwxrwx 1 root root 0 Jun  2 13:14 wlan2 -> ../../devices/virtual/mac80211_hwsim/hwsim2/wlan2
> # rmmod mac80211_hwsim mac80211 cfg80211
> # ip link
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
>     link/ether 52:54:00:12:34:56 brd ff:ff:ff:ff:ff:ff
> # ls -l /sys/class/net/
> total 0
> lrwxrwxrwx 1 root root 0 Jun  2 13:12 eth0 -> ../../devices/pci0000:00/0000:00:03.0/net/eth0
> lrwxrwxrwx 1 root root 0 Jun  2 13:12 lo -> ../../devices/virtual/net/lo
> lrwxrwxrwx 1 root root 0 Jun  2 13:14 wlan0 -> ../../devices/virtual/mac80211_hwsim/hwsim0/wlan0
> lrwxrwxrwx 1 root root 0 Jun  2 13:14 wlan1 -> ../../devices/virtual/mac80211_hwsim/hwsim1/wlan1
> lrwxrwxrwx 1 root root 0 Jun  2 13:14 wlan2 -> ../../devices/virtual/mac80211_hwsim/hwsim2/wlan2

Ah, so the network devices aren't getting removed?

Do you have network namespaces enabled in your kernel or disabled?

And this is 2.6.35-rc1, right?

Eric, any ideas?

thanks,

greg k-h
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