Re: [PATCH V2 0/5] fix WARNING: QA Issue on kmod/udev/nfs-utils (unsafe references [/ references to /usr/lib])

From: ChenQi <Qi.Chen@windriver.com>
To: <openembedded-core@lists.openembedded.org>
Subject: Re: [PATCH V2 0/5] fix WARNING: QA Issue on kmod/udev/nfs-utils (unsafe references [/ references to /usr/lib])
Date: Sat, 9 Nov 2013 13:26:33 +0800	[thread overview]
Message-ID: <527DC789.6050307@windriver.com> (raw)
In-Reply-To: <1383565168.6271.107.camel@ted>

On 11/04/2013 07:39 PM, Richard Purdie wrote:
> On Mon, 2013-11-04 at 17:56 +0800, Hongxu Jia wrote:
>> Change in V2: The fourth patch fixed the QA Issue on udev, it was missed on previous version.
>>
>> //Hongxu
>>
>> The following changes since commit f3541226b8b1187e79dec0f6f9f3c58cedf9ac9b:
>>
>>    bitbake: hob: do not display the "Package list may be incomplete!" dialog (2013-11-01 17:59:31 +0000)
>>
>> are available in the git repository at:
>>
>>    git://git.pokylinux.org/poky-contrib hongxu/fix-qa-issue
>>    http://git.pokylinux.org/cgit.cgi/poky-contrib/log/?h=hongxu/fix-qa-issue
>>
>> Hongxu Jia (5):
>>    insane.bbclass: support to skip  unsafe references in binaries qa
>>      check.
>>    kmod: fix QA issue
>>    udev: fix  QA issue
>>    udev: fix QA issue
>>    nfs-utils: fix QA issue
> Last time these warnings came up I asked for a clear plan about what
> needed to live in / and what needed to live in /usr and how we were
> going to fix things once and for all (or forget this idea).
>
> Where is the plan? Why is it ok to just ignore these particular
> warnings?
>
> Cheers,
>
> Richard

Hi Richard,

I want to propose the following solution for this unsafe reference issue.

The solution is based on the following two principles.
1. With /usr on a seperate partition, system should boot up without any error.
2. Without /usr, system should be able to boot into single user mode without any error.

When a QA warning about unsafe references is encountered, the above two principles,
together with FHS, are taken into consideration before making a decision.

For example, libkmod is moved to /lib because /lib/udevd requires it; libgudevd
is moved to /usr/lib because it's a GObject wrapper for libudev and it's obviously
not necessary for booting into single user mode.

The final goals of the solution:
1. Performing a world build doesn't report any warning about unsafe references.
2. System can boot into runlevel 5 without any error if /usr is on another partition.
3. System can boot into single user mode without any error even if /usr is missing.

Patches of this solution have been sent to this mailing list.

Best Regards,
Chen Qi

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