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1fa396719e
Multiple redirects to the same lower dir will falsely return the same st_ino/st_dev for two different upper dirs and will cause 'diff' to falsely report that content of directories is the same when it is not. This test checks that overalyfs detects and fails lookup of a multiply redirected dir. The check for multiply redirected dir was implemented by kernel commit titled "ovl: hash directory inodes for fsnotify". Signed-off-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>