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overlay: test nlink accounting of overlay hardlinks

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nlink of overlay inode should account for the union of lower
and upper hardlinks.

persistent overlay union nlink is stored in an extended attribute
on the upper inode.

In order to test persistent overlay nlink accounting, the test is
repeated with both warm and cold dentry/inode cache.

[eguan: add comments on what fields report_nlink prints]

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Amir Goldstein
2017-07-05 15:02:05 +03:00
committed by Eryu Guan
parent 7b4d655bb8
commit af55e91fd2
3 changed files with 220 additions and 0 deletions
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@@ -35,3 +35,4 @@
030 auto quick perms
031 auto quick whiteout
032 auto quick copyup hardlink
033 auto quick copyup hardlink