RFR(S): 8208623: [TESTBUG] runtime/LoadClass/LongBCP.java fails in AUFS file system

[Pengfei Li]

Hi David,

Thanks for your help. I've tested FileStore.type() in AUFS. It works well.

Please see the updated patch at http://cr.openjdk.java.net/~zyao/8208623/webrev.01/

--
Thanks,
Pengfei


> -----Original Message-----
> What does FileStore.type() show for AUFS? This little test seems to report
> other filesystem types okay:
> 
> import java.nio.file.*;
> 
> public class FileSystemCheck {
>    public static void main(String[] args) throws Throwable {
>      FileStore fs = Files.getFileStore(new java.io.File(args[0]).toPath());
>      System.out.println(fs.type());
>    }
> }
> 
>  > java9 FileSystemCheck /java
> autofs
>  > java9 FileSystemCheck /
> rootfs
>  > java9 FileSystemCheck /proc
> proc
>  > java9 FileSystemCheck .
> ext4
> 
> David
> -----
> 
> >
> > --
> >
> > Thanks,
> >
> > Pengfei
> >
> > ----------------------------------------------------------------------
> > --
> > *From:* David Holmes <david.holmes at oracle.com>
> > *Sent:* Wednesday, August 1, 2018 8:24:31 PM
> > *To:* Pengfei Li; hotspot-runtime-dev at openjdk.java.net
> > *Cc:* nd
> > *Subject:* Re: RFR(S): 8208623: [TESTBUG]
> > runtime/LoadClass/LongBCP.java fails in AUFS file system Hi Pengfei,
> >
> > On 1/08/2018 6:14 PM, Pengfei Li wrote:
> >> Hi,
> >>
> >> Could you please help review the small fix to jtreg test case
> >> "runtime/LoadClass/LongBCP.java" ?
> >>
> >> This case fails in Linux AUFS file system since the maximum file name
> >> length is shorter than 255.
> >>
> >> JBS: https://bugs.openjdk.java.net/browse/JDK-8208623
> >>
> >> webrev: http://cr.openjdk.java.net/~zyao/8208623/webrev.00/index.html
> > <http://cr.openjdk.java.net/%7Ezyao/8208623/webrev.00/index.html>
> >> <http://cr.openjdk.java.net/%7Ezyao/8208623/webrev.00/index.html>
> >
> > I'm wondering whether the filesystem type can be found through one of
> > the java.nio.file APIs i.e FileSystem/FileStore/FileSystemProvider so
> > that you do not have to exec the "stat -f -c %T ." command ??
> >
> > It would also be beneficial for checking the operation of the test to
> > print the "max length" value that it ends up testing.
> >
> > Thanks,
> > David
> >
> >> "Since aufs has several filename prefixes reserved, the maximum
> >> filename length is shorter than ordinary 255. Actually 242 (defined
> >> as ${AUFS_MAX_NAMELEN})." [1]
> >>
> >> --
> >>
> >> Thanks,
> >>
> >> Pengfei
> >>
> >> [1] http://aufs.sourceforge.net/aufs3/man.html
> >>