[Gluster-devel] Support to distinguish locks set via clients using SYNCOP framework

[Soumya Koduri]

Hi,

Server lock xlator seems to be distinguishing the various locks set by 
the clients on a file using two parameters -

* client UUID
* frame->root->lk_owner

Hence if it is the same client setting locks on a file, for the server 
to treat them as being from different owners, the client need to pass 
different lk_owners(as 'frame->root->lk_owner') for all those locks.

At present FUSE and gluster-nfs set this field while creating the frame 
whereas this support is missing for the clients using the SYNCOP framework.

Have made the changes to fix the same. In addition have added an API in 
gfapi to pass the lk_owner to syncopctx.

http://review.gluster.org/#/c/9482/

Kindly review the changes.

Thanks,
Soumya