A possible fix for JDK-8165852: Mount point not found for a file which is present in overlayfs

[Brian Burkhalter]

Hello, Fridrich,

Excellent! This would be good if it works albeit inelegantly: function over form. I’ll add it to my list to review. To test it I will need to dust off my Linux VM which has all this stuff (Docker, btrfs, etc.) installed.

Thanks,

Brian

On Sep 27, 2017, at 5:31 AM, Fridrich Strba <fridrich.strba at suse.com> wrote:

> Hello, good people,
> 
> I think I fixed the overlayfs and btrfs problems in LinuxFileStore. The
> attached patch is what makes it work for us. Basically, when we come to
> the device-id boundary, we check whether it corresponds to a mount point
> in the files and if so, we return. If not, we go down the file system
> looking for another boundary. If we come to the root of the file-system
> without finding other mount-point and if the / is in the files, we
> return the entry that corresponds to it. If not, we throw the exception.
> 
> It is not elegant, but it works. I would love to have someone to look at
> it and consider whether it could be up-streamed.
> 
> Thanks in advance
> 
> Fridrich
> 
> 
> <java-10-openjdk-linuxfilestore.patch>