[Pvfs2-developers] Re: setting xattrs on pvfs2 root

[Phil Carns]

This is with 2.6 (both very recent and relatively old version).  Many 
thanks for looking at it.

-Phil

Murali Vilayannur wrote:
> hi Phil,
> Are you using 2.4. kernel versions? or 2.6?
> If xattrs dont work, ACLs also won't work.
> I will dig into this and let you know what I find out..
> thanks,
> Murali
> 
> On 6/28/07, Phil Carns <pcarns at wastedcycles.org> wrote:
>> I am interested in this because it would be nice to be able to set
>> tuning options at the root directory level without modifying the server
>> side configuration files.  I also wonder if this issue would cause
>> problems for ACLs on the root directory.
>>
>> -Phil
>>
>> Murali Vilayannur wrote:
>> > Hey Phil,
>> > Sorry I forgot to get back to you on this..
>> > No I don't think this would work.
>> > It is a kernel module issue that I hadnt tracked down fully..
>> > Do you need this feature?
>> > thanks,
>> > Murali
>> >
>> > On 6/27/07, Phil Carns <pcarns at wastedcycles.org> wrote:
>> >> Just pinging on this one again- has any one else bumped into this
>> >> problem?
>> >>
>> >> -Phil
>> >>
>> >> Phil Carns wrote:
>> >> > It looks like pvfs2 does not allow you to set xattrs on the root
>> >> > directory.  Is this expected?
>> >> >
>> >> > # checking the mount options:
>> >> >
>> >> >  > mount -t pvfs2
>> >> > tcp://localhost:3334/pvfs2-fs on /mnt/pvfs2 type pvfs2 
>> (rw,user_xattr)
>> >> >
>> >> > # confirming that xattrs can be set on a normal directory:
>> >> >
>> >> >  > setfattr -n user.pvfs2.num_dfiles -v "1" /mnt/pvfs2/dir1
>> >> >  > getfattr -n user.pvfs2.num_dfiles /mnt/pvfs2/dir1
>> >> > getfattr: Removing leading '/' from absolute path names
>> >> > # file: mnt/pvfs2/dir1
>> >> > user.pvfs2.num_dfiles="1"
>> >> >
>> >> > # trying to set xattrs on the root directory:
>> >> >
>> >> >  > setfattr -n user.pvfs2.num_dfiles -v "1" /mnt/pvfs2
>> >> > setfattr: /mnt/pvfs2: Operation not permitted
>> >> >  > getfattr -n user.pvfs2.num_dfiles /mnt/pvfs2
>> >> > /mnt/pvfs2: user.pvfs2.num_dfiles: No such attribute
>> >> >
>> >> > All of the above is run as root.  I don't think it is anything 
>> special
>> >> > about the num_dfiles attribute either; it looks like I can't set any
>> >> > xattrs on the root directory.  It always responds with "Operation 
>> not
>> >> > permitted".
>> >> >
>> >> > -Phil
>> >> >
>> >>
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>>
>>