netdev - Re: [PATCH iproute2-next v3 0/3] ip/tunnel: Unify tunnel help message print routines

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Message-ID: <200bd7de-9baf-b42b-35ff-2017fdfaed9e@gmail.com>
Date:   Fri, 9 Feb 2018 09:09:02 -0700
From:   David Ahern <dsahern@...il.com>
To:     Serhey Popovych <serhe.popovych@...il.com>, netdev@...r.kernel.org
Subject: Re: [PATCH iproute2-next v3 0/3] ip/tunnel: Unify tunnel help message
 print routines

On 2/8/18 11:58 PM, Serhey Popovych wrote:
> To show only relevant diffs of ip and ipv6 variants help message print
> routines needs to be unified and improved.
> 
> Get rid of print_usage() and usage() wrappers: use single function to
> output help message. As side effect we return -1 from parse function
> instead of calling exit(2) in case of "... tunnel <help|garbage>" is
> found.
> 
> Additionally we get pointer to @struct link_util and can directly access
> ->id information to prepare customized help message.
> 
> Split calls to fprintf() two group: one that contains format string with
> specifiers (thus requiring parameters) and another one that does not.
> This helps compiler to optimize calls to fprintf() with fputs() when no
> format specifiers in string. Do not use fputs() directly to keep code
> formatting nice.
> 
> After this series applied following diffs:
> 
>   # diff -urN ip/link_gre{,6}.c
>   # diff -urN ip/link_vti{,6}.c
>   # diff -urN ip/link_ip{,6}tnl.c
> 
> in scope of help print routines reduced to necessary minimum.
> 
> Tested minimally by compiling and executing "ip link help <kind>" and
> "ip link add type help" commands. Looks correct.
> 

series applied to iproute2-next