Hi, I'm facing some problems with network namespaces and wireless devices. If I move a network physical device into a network namespace and then try to do any operation on the phy, it will always result into "command failed: No such file or directory (-2)" occures. For additional informations see below. I think this is a bug, but maybe there is a good reason for this. If it's not a bug, do you have any idea for a workaround? I need a working >iw< inside a network namespace (e.g. sshd in a docker-container). Thanks in advance, Tim PS: Please keep me in CC or send me a quick message if I need to subscribe to the mailinglist to follow the thread. ----------------------------------------- How to reproduce? #First unshare a process, e.g. a bash > unshare -n bash #Get it's process id > echo $$ #in an other terminal #Move phy to process network namespace > iw phy phy0 set netns %PROCESSID% #in first terminal (unshared bash) #do any phy operation > iw phy phy0 info #Leads to: command failed: No such file or directory (-2) #any device related commands still work > iw dev wlan0 info ----------------------------------------- Additional information: If I use ip netns exec it's working: #netns is only working with named networks so let's create one > ln -sf /proc/%PROCESSID%/ns/net /var/run/netns/test > iw phy phy0 set netns %PROCESSID% #works > ip netns exec test iw phy phy0 info #Still doesn't work, can also be called in unshared bash terminal > nsenter -t %PROCESSID% -n iw phy phy0 info Maybe helpful: > ip netns exec test find /sys/class/ieee80211/ | grep phy0 #finds /sys/class/ieee80211/phy0 > nsenter -t %PROCESSID% -n find /sys/class/ieee80211/ | grep phy0 #no result ----------------------------------------- Kernel version etc: This problem occurs with vanilla kernel 4.10.1 x86_64 (stable), iw version 4.9 and various wifi devices (Intel 7260, mac80211_hwsim, Atheros AR5413). I also tried older distro kernels.
