[Ocfs2-devel] review patch: return in progress if master can not clear the refmap bit right now

[Zhangguanghui]

hi

We found a BUG situation described below. To fix the bug, I think
dlm_drop_lockres_ref should be 0 in the case of dlm_is_host_down(master goes down).
or list_del_init(&res->purge) should be behind the !master && ret != 0  return,
the res will release int the recovery process while umounting the vol.
Thanks

detail:

 Node 1                                                                           Node 2(master)
    dlm_purge_lockres
       dlm_drop_lockres_ref                                               master goes down
        list_del_init(&res->purge)
       !master && ret != 0  return
       get a failure while umounting.


ocfs2/dlm: return in progress if master can not clear the refmap bit right now
Master returns in-progress to non-master node when it can not clear the refmap bit right now. And non-master node will not purge the lock resource until receiving deref done message.

________________________________
zhangguanghui
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