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SecureShare: safe UNIX/Windows file sharing through multiprotocol locking

As mixed UNIX/Windows environments become more common, safe file sharing among the NFS and CIFS clients becomes a significant problem. In this paper, we describe SecureShare, a multiprotocol file sharing technology that resolves the mismatch between NFS/NLM and CIFS file locking protocols, provides coherent caching and enables multiprotocol change notification. SecureShare achieves the goal through a uniform lock-mode model and multiprotocol oplock management. This paper presents the main features of SecureShare and discusses the rationale behind its design.