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

[Phil Carns]

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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