Re: [PATCH] mountd: regression in crossmounts

[Steve Dickson <SteveD@redhat.com>]

On 25/03/13 19:36, J. Bruce Fields wrote:
> On Mon, Mar 25, 2013 at 05:27:36PM -0400, J. Bruce Fields wrote:
>> On Mon, Mar 25, 2013 at 04:22:21PM -0400, Steve Dickson wrote:
>>>
>>>
>>> On 25/03/13 14:13, J. Bruce Fields wrote:
>>>> On Sat, Mar 23, 2013 at 10:32:29AM -0400, Steve Dickson wrote:
>>>>> commit 8e2fb3fc cause a regression in mount export
>>>>> that are on different local file system.
>>>>> Exports like (all on different filesystems)
>>>>>
>>>>> /home *(rw,fsid=0,crossmnt)
>>>>> /home/fs1 *(rw,crossmnt)
>>>>> /home/fs1/fs2/fs3 *(rw,nohide)
>>>>>
>>>>> and then a mount of the root 'mount /home /mnt'
>>>>> would end up mounting /home/fs1/fs2/fs3 not /home
>>>>
>>>> That's strange.
>>> Yeah... I had this guy reporting from day one that the 
>>> latest nfs-utils broke his export world... 
>>>  
>>>>
>>>>> Reverting the logic of commit 8e2fb3fc until
>>>>> a better solution can be found for the original
>>>>> problem.
>>>>
>>>> I can't figure out why the patch below would help.  The only change I
>>>> can see is to the way that an export of "/" would be handled.
>>> The reason I didn't debug this further was I did not know how to 
>>> reproduce the original problem the patch was trying to fix... 
>>
>> Could you remind me where the bug report for this is?
> 
> Oh, right, it was https://bugzilla.redhat.com/show_bug.cgi?id=909882
> 
> I'm not seeing why you think this helps.
Because it does... ;-) 
     https://bugzilla.redhat.com/show_bug.cgi?id=909882#c10
     https://admin.fedoraproject.org/updates/FEDORA-2013-4396/nfs-utils-1.2.7-5.fc18

What I would like to is how to reproduce the original problem so
we can fix it without creating this regression.... 

steved.