netdev - Re: [PATCH 3/3] ipip: add module alias for tunl0 tunnel device

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Date:	Tue, 30 Nov 2010 15:55:15 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Stephen Hemminger <shemminger@...tta.com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH 3/3] ipip: add module alias for tunl0 tunnel device

On Tue, Nov 30, 2010 at 3:19 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> Le lundi 29 novembre 2010 à 11:47 -0800, Stephen Hemminger a écrit :
>> pièce jointe document texte brut (ipip-alias.patch)
>> If ipip is built as a module the 'ip tunnel add' command would fail because
>> the ipip module was not being autoloaded.  Adding an alias for
>> the tunl0 device name cause dev_load() to autoload it when needed.
>>
>> Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
>>
>> --- a/net/ipv4/ipip.c 2010-11-29 11:40:25.026277890 -0800
>> +++ b/net/ipv4/ipip.c 2010-11-29 11:41:05.790681069 -0800
>> @@ -913,3 +913,4 @@ static void __exit ipip_fini(void)
>>  module_init(ipip_init);
>>  module_exit(ipip_fini);
>>  MODULE_LICENSE("GPL");
>> +MODULE_ALIAS("tunl0");
>
> I am not sure I understand you...
>
> Here, I do have ipip built as a module, and I have no problem :
>
> # lsmod|grep ipip
> # ip tunnel add
> cannot determine tunnel mode (ipip, gre or sit)
> # lsmod|grep ipip
> # ip tunnel add mode ipip
> # lsmod|grep ipip
> ipip                    7692  0
> tunnel4                 2949  1 ipip
> #
>
> What am I missing ?
>
>

localhost linux # lsmod
Module                  Size  Used by
ipv6                  309359  12
localhost linux # ip -V
ip utility, iproute2-ss091226
localhost linux # ip tunnel add mode gre
ioctl: No such device
localhost linux # ip tunnel add mode ipip
ioctl: No such device
localhost linux # modprobe ip_gre
localhost linux # modprobe ipip
localhost linux # ip tunnel add mode ipip
localhost linux # ip tunnel add mode gre
localhost linux # lsmod
Module                  Size  Used by
ipip                    8128  0
tunnel4                 2683  1 ipip
ip_gre                 15055  0
gre                     1967  1 ip_gre
ipv6                  309359  13 ip_gre


-- 
Regards,
Changli Gao(xiaosuo@...il.com)
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