Re: [PATCH] iproute2: show network device dependency tree

Tue, Feb 28, 2017 at 09:19:23PM CET, zaboj.campula@post.cz wrote:

On Mon, 2017-02-27 at 10:55 -0800, Stephen Hemminger wrote:

quoted

Another alternative format would be to make -tree a output modifier and ident (like ps tree options).

$ ip -t link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
8: bond0 <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:66:24:cd brd ff:ff:ff:ff:ff:ff 
    2: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master bond0 state DOWN mode DEFAULT group default qlen 1000
        link/ether 52:54:00:66:24:cd brd ff:ff:ff:ff:ff:ff

OK, it looks better because the information is complete.

I looked at several tree printing utilities and I like
the lsblk format. But tabular format does not fit the ip-show
well. I will try to indent the current ip-show output may be
with fancy lines.

I don't really think that the output you provide has any value. As JiriB
wrote, it is really problematic to draw relationships between devices.
Let's take OVS as a very non-trivial example. Your patch aims to handle
only the very basic ones.