netdev - Re: [PATCH 3/3] iproute2: Add support for phys_port

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Date:	Thu, 26 Mar 2015 21:41:33 -0600
From:	David Ahern <dsahern@...il.com>
To:	Stephen Hemminger <stephen@...workplumber.org>
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH 3/3] iproute2: Add support for phys_port_name

On 3/24/15 4:50 PM, Stephen Hemminger wrote:
>> diff --git a/ip/ipaddress.c b/ip/ipaddress.c
>> index 99a6ab5977e3..9e65015b7a48 100644
>> --- a/ip/ipaddress.c
>> +++ b/ip/ipaddress.c
>> @@ -645,6 +645,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
>>   				      b1, sizeof(b1)));
>>   	}
>>
>> +	if (tb[IFLA_PHYS_PORT_NAME])
>> +		fprintf(fp, "port name %s ", rta_getattr_str(tb[IFLA_PHYS_PORT_NAME]));
>> +
>>   	if (tb[IFLA_OPERSTATE])
>>   		print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
>>
>
> In general, this is a good idea, but there are several of issues.
> 1. There are programs that parse ip route output, therefore all new
>     fields need to go at the end.
> 2. The two word format 'port name' does not match other parts
> 3. Extra stuff usually goes int 'details' section
> 4. There are VPN scripts etc that expect all ip commands to
>     be invertable. I.e the output of ip link should also be easily
>     convertable to input.

The location of PORT_NAME is right after PORT_ID. I take it from this 
list you want it elsewhere. At the end?

And rather than 'port name' how about 'port-name'? no precedence for 
CamelCase and both 'port' and 'name' are too generic. 'pname' is not 
intuitive. Suggestions?

David
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