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OpenAFS on Windows: A Status Report

OpenAFS on Windows: A Status Report. Jeffrey Altman The OpenAFS Project 26 March 2014. SMB Windows is dead. 1.6 Windows releases were halted after 1.6.1. No fix for SMB 1.x Authentication Bug in Windows 7 and beyond

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OpenAFS on Windows: A Status Report

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  1. OpenAFS on Windows:A Status Report Jeffrey Altman The OpenAFS Project 26 March 2014

  2. SMB Windows is dead • 1.6 Windows releases were halted after 1.6.1. • No fix for SMB 1.x Authentication Bug in Windows 7 and beyond • Microsoft fixed it but insufficient demand from community for them to release it

  3. 1.7 News • 1.7.30 is current • 13 releases since Edinburgh conference • Windows 8.1 and Server 2012 R2

  4. Symlink Processing • Symlink Reparse Points compatible with NTFS and ReFS • Symlinks can be copied to/from \\AFS • Robocopy /SL option

  5. Cygwin Interoperability • As of Cygwin 1.7.19 and OpenAFS 1.7.23, Cygwin recognizes //afs • ln –s now creates symlinks • Prior versions of Cygwin • Reported symlinks as directories or files • Copied target instead of link • Reported incorrect size/free space

  6. Symlinks on Windows • http://blog.secure-endpoints.com/2013/03/symbolic-links-on-windows.html • .NET and Java (pre-1.6) • not Reparse Point aware • Read File Sizes and Attributes incorrectly • Side Effect: • Reads of Symlinks to Files truncates data • OpenAFS Reparse Point Policies • Expose Symlinks as x-volume hardlinks

  7. Anti-malware Headaches • Trend Micro 10.4 and prior releases should be avoided • Workaround for TM related deadlocks produced other deadlocks • OpenAFS 1.7.27 replaced fix with an alternative • Safe for TM 10.5 and above

  8. Windows XP / Server 2003 • OpenAFS 1.7.27 and prior experience data corruption due to a bug in the Windows IO Manager • Multiple outstanding Synchronous Writes must not be issued to the same file • Workaround in 1.7.28 • Do not defer writes that cannot be completed

  9. 1.7.30 Released Today • Performance optimizations • Cache VL_GetAddrsU responses • XP cannot use secure bindings of devices to MUP • Prevents “limited” users from accessing \\AFS • Windows Advanced Firewall autoconfiguration changes

  10. Windows XP End of Life • 8 April 2014 • No more updates for XP from Microsoft • No more Microsoft Anti-malware Engine Updates for XP

  11. OpenAFS on WINDOWS Status REPORT

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