• Patrick McHardy's avatar
    rtnetlink: support specifying device flags on device creation · 3729d502
    Patrick McHardy authored
    commit e8469ed959c373c2ff9e6f488aa5a14971aebe1f
    Author: Patrick McHardy <kaber@trash.net>
    Date:   Tue Feb 23 20:41:30 2010 +0100
    
    Support specifying the initial device flags when creating a device though
    rtnl_link. Devices allocated by rtnl_create_link() are marked as INITIALIZING
    in order to surpress netlink registration notifications. To complete setup,
    rtnl_configure_link() must be called, which performs the device flag changes
    and invokes the deferred notifiers if everything went well.
    
    Two examples:
    
    # add macvlan to eth0
    #
    $ ip link add link eth0 up allmulticast on type macvlan
    
    [LINK]11: macvlan0@eth0: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
        link/ether 26:f8:84:02:f9:2a brd ff:ff:ff:ff:ff:ff
    [ROUTE]ff00::/8 dev macvlan0  table local  metric 256  mtu 1500 advmss 1440 hoplimit 0
    [ROUTE]fe80::/64 dev macvlan0  proto kernel  metric 256  mtu 1500 advmss 1440 hoplimit 0
    [LINK]11: macvlan0@eth0: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500
        link/ether 26:f8:84:02:f9:2a
    [ADDR]11: macvlan0    inet6 fe80::24f8:84ff:fe02:f92a/64 scope link
           valid_lft forever preferred_lft forever
    [ROUTE]local fe80::24f8:84ff:fe02:f92a via :: dev lo  table local  proto none  metric 0  mtu 16436 advmss 16376 hoplimit 0
    [ROUTE]default via fe80::215:e9ff:fef0:10f8 dev macvlan0  proto kernel  metric 1024  mtu 1500 advmss 1440 hoplimit 0
    [NEIGH]fe80::215:e9ff:fef0:10f8 dev macvlan0 lladdr 00:15:e9:f0:10:f8 router STALE
    [ROUTE]2001:6f8:974::/64 dev macvlan0  proto kernel  metric 256  expires 0sec mtu 1500 advmss 1440 hoplimit 0
    [PREFIX]prefix 2001:6f8:974::/64 dev macvlan0 onlink autoconf valid 14400 preferred 131084
    [ADDR]11: macvlan0    inet6 2001:6f8:974:0:24f8:84ff:fe02:f92a/64 scope global dynamic
           valid_lft 86399sec preferred_lft 14399sec
    
    # add VLAN to eth1, eth1 is down
    #
    $ ip link add link eth1 up type vlan id 1000
    RTNETLINK answers: Network is down
    
    <no events>
    Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    3729d502
veth.c 9.95 KB