netdev - Re: bridge-utils: wrong sysfs path odds

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Date:	Wed, 25 Nov 2015 23:41:22 +0100
From:	Richard Weinberger <richard@....at>
To:	Florian Fainelli <f.fainelli@...il.com>,
	Stephen Hemminger <stephen@...workplumber.org>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Ralf Baechle <ralf@...ux-mips.org>, manty@...ian.org
Subject: Re: bridge-utils: wrong sysfs path odds

Am 25.11.2015 um 23:38 schrieb Florian Fainelli:
> On 25/11/15 01:21, Richard Weinberger wrote:
>> Am 25.11.2015 um 01:37 schrieb Stephen Hemminger:
>>> On Wed, 25 Nov 2015 01:24:47 +0100
>>> Richard Weinberger <richard@....at> wrote:
>>>
>>>> Am 25.11.2015 um 01:15 schrieb Richard Weinberger:
>>>>> Hi!
>>>>>
>>>>> Today I was hunting down an issue where "brctl stp br0 off"
>>>>> always failed on mips64be with n32 userland.
>>>>>
>>>>> It turned out that the ioctl(fd, SIOCDEVPRIVATE, &ifr) with BRCTL_SET_BRIDGE_STP_STATE
>>>>> returned -EOPNOTSUPP.
>>>>> First I thought that this is a plain ABI issue on mips as in old_dev_ioctl()
>>>>> the ioctl() argument was 0x1 instead of the expected BRCTL_SET_BRIDGE_STP_STATE (0x14)
>>>>
>>>> Should be 0xe and not 0x14. It is 14 in decimal. :)
>>>>
>>>> Thanks,
>>>> //richard
>>>
>>> Ask Debian maintainer to send his patches, I don't go patch hunting.
>>>
>>
>> While looking what other distros do I came across this patch:
>> https://pkgs.fedoraproject.org/cgit/bridge-utils.git/tree/bridge-utils-1.5-check-error-returns-from-write-to-sysfs.patch
>>
>> Beside of checking return errors is fixes also the sysfs path in br_set().
>> Can you please merge it upstream?
>>
>> Distros seems to carry more patches for that package, if it helps I can do the patch hunting for you.
>> It would be nice to have a recent bridge-utils release. The last one is from 2011.
> 
> Most of what bridge-utils does can be done by iproute2's bridge
> sub-command FWIW.

Sure, but a lot of userspace still depends on brctl.
And IMHO brctl is magnitudes easier to use than iproute's bridge tool.

Thanks,
//richard
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