[lvm-devel] [PATCH mirror 10/13] Generalize "mlog" handling of dtree

[Jun'ichi Nomura]

Currently, "_mlog" is handled specially in dtree.
It puts a restriction to log LV naming and actually,
current code can't allow multiple mirror logs in a LV.

This is a problem if we allow to add temporary mirror logs
for resynching newly added mirrors.

The patch changes the addition of mirror log to dtree:
  BEFORE: Adds a device with lv->name + "_mlog"
  AFTER:  Adds seg->log_lv

If there is a case where log LV is not set in seg->log_lv
but should be treated as a part of dtree, this change breaks the case.
I would like to know if there's such a case.

Thanks,
-- 
Jun'ichi Nomura, NEC Corporation of America

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