avg 8dd87fbeaf zfs_dirlook: bailout early if directory is unlinked
Otherwise we could fail with an incorrect error if e.g. parent
object id is removed too or we can even return a wrong vnode if
parent object has been already re-used.

Discussed with:	pjd
Also see:	http://article.gmane.org/gmane.os.freebsd.devel.file-systems/13863
MFC after:	26 days
2012-11-04 14:50:08 +00:00
..
2012-11-03 22:39:07 +00:00
2012-10-10 08:36:38 +00:00
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2012-10-10 08:36:38 +00:00
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2012-11-03 22:21:37 +00:00
2012-10-10 08:36:38 +00:00