Unable to move sublvan into new netns

[twabulldogg]

I am trying to create a VLAN sub-interface with an associated macvlan passthru interface to move into a new netns using pyroute2. I am able to successfully create both the vlan and sub-interface, but I am only able to move the VLAN interface into the new netns. Here is example code:

def createVLAN():                                                      
    extra_create_params = {}                                           
    extra_create_params['macvlan_mode'] = 'passthru'                   
    ipdb = IPDB()                                                      
    parent_if = ipdb.create(ifname="eth1.3700",                        
                           kind='vlan',                                
                           link=ipdb.interfaces.get("eth1"),           
                           vlan_protocol=0x8100,#0x88a8                
                           vlan_id=3700                                
                           )                                           
    parent_if.up().commit()                                            
    child_if = ipdb.create(ifname="host_eth1.3700",                    
                           kind='macvlan',                             
                           link="eth1.3700",                           
                           **extra_create_params                       
                           )                                           
    nl=NetNS("test")                                                   
    child_if.net_ns_fd = "test"                                        
    child_if.up().commit()                                             
    nl.release()                                                       
    ipdb.release()                                                     
                                                                       
                                                                       
def createSubVLAN():                                                   
    extra_create_params = {}                                           
    extra_create_params['macvlan_mode'] = 'passthru'                   
    ipdb = IPDB()                                                      
    parent_if = ipdb.create(ifname="eth1.3700.8",                      
                           kind='vlan',                                
                           link=ipdb.interfaces.get("eth1.3700"),      
                           vlan_protocol=0x8100,                       
                           vlan_id=8                                   
                           )                                           
    parent_if.up().commit()                                            
                                                                       
    child_if = ipdb.create(ifname="host_eth1.3700.8",                  
                           kind='macvlan',                             
                           link="eth1.3700.8",                         
                           **extra_create_params                       
                           )                                                    
    child_if.net_ns_fd = "test"                                        
    child_if.up().commit()                                             
                                                                       
                                                                       
if __name__ == "__main__":                                             
    createVLAN()                                                       
    createSubVLAN() 

The results of the script are:

Traceback (most recent call last):
  File "./test.py", line 108, in <module>
    createSubVLAN()
  File "./test.py", line 103, in createSubVLAN
    child_if.up().commit()
  File "/usr/local/lib/python2.7/dist-packages/pyroute2/ipdb/interfaces.py", line 572, in commit
    self.nl.link('add', **request)
  File "/usr/local/lib/python2.7/dist-packages/pyroute2/iproute.py", line 1310, in link
    msg_flags=msg_flags)
  File "/usr/local/lib/python2.7/dist-packages/pyroute2/netlink/nlsocket.py", line 804, in nlm_request
    return do_try()
  File "/usr/local/lib/python2.7/dist-packages/pyroute2/netlink/nlsocket.py", line 783, in do_try
    callback=callback)
  File "/usr/local/lib/python2.7/dist-packages/pyroute2/netlink/nlsocket.py", line 648, in get
    raise msg['header']['error']
pyroute2.netlink.exceptions.NetlinkError: (34, 'Numerical result out of range')

Am I missing something when moving the VLAN sub-interface into the new netns that is different from the VLAN interface?

I tried with 0x8100 and 0x88a8 as the VLAN protocol and double checked the creation of the sub-interface from issue #361

[etene]

Hey,
You're seeing this error because the interface's name is too long; it's 16 characters but the maximum allowed by the kernel is 15.
I tried your code and with a shorter interface name, it seems to work.

[twabulldogg]

Ah, yes, that works. Thank you!