[Bug 3468] [IcedTea8] 8165852: Mount point not found for a file which is present in overlayfs

[bugzilla-daemon at icedtea.classpath.org]

https://icedtea.classpath.org/bugzilla/show_bug.cgi?id=3468

Fridrich Strba <fridrich.strba at bluewin.ch> changed:

           What    |Removed                     |Added
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                 CC|                            |fridrich.strba at bluewin.ch

--- Comment #2 from Fridrich Strba <fridrich.strba at bluewin.ch> ---
Ok, for the summary, some precisions: the code already checks /proc/mounts
before this change. The difference is that the code was descending the
directory tree to find difference of device id between parent and child and if
reaching this, it assumed it was in a mount-point. The problem is that if that
particular directory was not in the /proc/mounts, the method was throwing
exception and ending there. The change is modifying this behaviour. Whenever
one hits the device-id difference one checks whether a mount-point corresponds
to the particular directory and if so, one returns the mount-point. However, if
not, one continues descending the tree until one hits a mount-point, or the
parent is null. If the parent is null, one checks the last time whether "/" is
a mount-point in /proc/mounts and if so, returns it. If not, it is only and
only there that the exception is thrown.

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