From: Serhey Popovych <serhe.popov...@gmail.com> Date: Wed, 21 Jun 2017 12:12:24 +0300
> There are number of problems with configuration peer > network device in absence of IFLA_VETH_PEER attributes > where attributes for main network device shared with > peer. > > First it is not feasible to configure both network > devices with same MAC address since this makes > communication in such configuration problematic. > > This case can be reproduced with following sequence: > > # ip link add address 02:11:22:33:44:55 type veth > # ip li sh > ... > 26: veth0@veth1: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc \ > noop state DOWN mode DEFAULT qlen 1000 > link/ether 00:11:22:33:44:55 brd ff:ff:ff:ff:ff:ff > 27: veth1@veth0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc \ > noop state DOWN mode DEFAULT qlen 1000 > link/ether 00:11:22:33:44:55 brd ff:ff:ff:ff:ff:ff > > Second it is not possible to register both main and > peer network devices with same name, that happens > when name for main interface is given with IFLA_IFNAME > and same attribute reused for peer. > > This case can be reproduced with following sequence: > > # ip link add dev veth1a type veth > RTNETLINK answers: File exists > > To fix both of the cases check if corresponding netlink > attributes are taken from peer_tb when valid or > name based on rtnl ops kind and random address is used. > > Signed-off-by: Serhey Popovych <serhe.popov...@gmail.com> Applied.
