netdev - Re: add ip to interface as primary ip address, not secondary ip when there is alreadly primary ip?

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Message-ID: <CAK3+h2xdZFSQFGm9W+HDP3nOsAhgrz1A=9MNtGP9bRbBXb7OJQ@mail.gmail.com>
Date:	Thu, 19 Sep 2013 20:53:48 -0700
From:	Vincent Li <vincent.mc.li@...il.com>
To:	Cong Wang <xiyou.wangcong@...il.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: add ip to interface as primary ip address, not secondary ip when
 there is alreadly primary ip?

yes, I found them too, they are for 'ip addr show' or 'ip addr list'
though, not for 'ip addr add' unless  I am missing something obvious.
care to clarify further ?

Vincent

On Thu, Sep 19, 2013 at 7:28 PM, Cong Wang <xiyou.wangcong@...il.com> wrote:
> On Thu, 19 Sep 2013 at 16:54 GMT, Vincent Li <vincent.mc.li@...il.com> wrote:
>> thanks for the pointer
>>
>> 'ip addr' indeed has flag IFA_F_SECONDARY for this, but it is not
>> available for 'ip addr add', so I made a simple patch for iproute2
>> ip/ipaddress.c as below:
>
> % git grep secondary ip/ipaddress.c
> ip/ipaddress.c: fprintf(stderr, "FLAG  := [ permanent | dynamic |
> secondary | primary |\n");
> ip/ipaddress.c:                 fprintf(fp, "secondary ");
> ip/ipaddress.c:static int print_addrinfo_secondary(const struct
> sockaddr_nl *who,
> ip/ipaddress.c:                         .filter =
> print_addrinfo_secondary,
> ip/ipaddress.c:         } else if (strcmp(*argv, "secondary") == 0 ||
>
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