[Bugs] [Bug 1218959] New: dht/rebalancer: Marking tiering migration fops

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1218959

            Bug ID: 1218959
           Summary: dht/rebalancer: Marking tiering migration fops
           Product: GlusterFS
           Version: 3.7.0
         Component: tiering
          Assignee: bugs at gluster.org
          Reporter: josferna at redhat.com
        QA Contact: bugs at gluster.org
                CC: bugs at gluster.org



Description of problem:

This is a follow up patch for http://review.gluster.org/#/c/10080
In the above, the suggested change in
http://review.gluster.org/#/c/10080/7/xlators/cluster/dht/src/dht-rebalance.c
doesnot work. The reason it doesnt work is promotion and demotion are done in
a multithread way. Whenever a promotion or demotion thread is called, the frame
of the old sync_op thread is not carried with it. As a result the
frame->root->pid
is not set.
Solution:
When the file is getting migrated, we get a tiering.migration key_value in the
xattr dict, so that we pass  this dic key-value when we do syncop_setxattr()
to do  data migration and set the frame->root->pid GF_CLIENT_PID_TIER_DEFRAG
in dht_setxattr() just before calling dht_start_rebalance_task().


Version-Release number of selected component (if applicable):


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Additional info:

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