Hi,
While thinking about "origin" xattr, i find a problem which retrieval
methods show as below:
$mkdir lower lower1 lower2 upper work merge
$touch lower1/a
$mount -t overlay -olowerdir=lower:lower1,upperdir=upper,workdir=work
merge merge
$echo abc > merge/a
$ls -li merge/a
Then, we can get the ino of file a equals to the ino of lower1/a.
$umount merge
$mount -t overlay -olowerdir=lower:lower2,upperdir=upper,workdir=work
merge merge
$ls -li merge/a
The ino for file a is same as file lower1/a, while there is no file a in
lower and lower2. Because ovl_get_origin will get the wrong origin.
Thanks,
yangerkun
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