netdev - Re: [PATCH iproute2/net-next v3]tc: B.W limits can now be specified in %.

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Date:   Sat, 25 Nov 2017 02:13:46 +0530
From:   Nishanth Devarajan <ndev2021@...il.com>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org, doucette@...edu, michel.machado@...il.com
Subject: Re: [PATCH iproute2/net-next v3]tc: B.W limits can now be specified
 in %.

On Fri, Nov 24, 2017 at 11:25:28AM -0800, Stephen Hemminger wrote:
> On Sat, 18 Nov 2017 02:13:38 +0530
> Nishanth Devarajan <ndev2021@...il.com> wrote:
> 
> > This patch adapts the tc command line interface to allow bandwidth limits
> > to be specified as a percentage of the interface's capacity.
> > 
> > Adding this functionality requires passing the specified device string to
> > each class/qdisc which changes the prototype for a couple of functions: the
> > .parse_qopt and .parse_copt interfaces. The device string is a required
> > parameter for tc-qdisc and tc-class, and when not specified, the kernel
> > returns ENODEV. In this patch, if the user tries to specify a bandwidth
> > percentage without naming the device, we return an error from userspace.
> > 
> > v2:
> > * Modified and moved int read_prop() from ip/iptuntap.c to lib/utils.c,
> > to make it accessible to tc. 
> > 
> > v3:
> > * Modified and moved int parse_percent() from tc/q_netem.c to ib/util.c for
> > use in tc.
> > 
> > * Changed couple variable names in int parse_percent_rate().
> > 
> > * Handled showing error message when device speed is unknown.
> > 
> > * Updated man page to warn users that when specifying rates in %, tc only
> > uses the current device speed and does not recalculate if it changes after.
> > 
> > During cases when properties (like device speed) are unknown, read_prop()
> > assumes that if the property file can be opened but not read, it means
> > that the property is unknown.
> > 
> > Signed-off by: Nishanth Devarajan<ndev2021@...il.com>
> > 
> 
> Applied, but there were three things that I needed to change:
>   1. The DCO tag is "Signed-off-by" not "Signed-off by"
>   2. The revision history should be below the cut line --- in the mail message
>      so that it doesn't end up in the commit message.
>   3. The qopt function declarations now are a really long line.
>      I will break them up.
>

Thanks for the help, and will do, I'll keep the feedback in mind for
future patches, thanks.

-Nishanth