HP UX Common Internet File System (CIFS) Client/Server Software manual Byte Range Locking

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B.2

Byte Range Locking

Windows and NFS clients invoke byte range locking with API and function calls. These locks are processed in server user space, where the Windows client locking semantics are translated by smbd to UNIX fcntl locks and propagated to the Kernel Lock Manager. The Kernel Lock Manager is the common denominator for the platform locking semantics, which allows the platform locks to interoperate and guarantee data integrity when the advisory protocol is adhered to.

CIFS/9000 implements cross-platform CIFS/NFS byte range locking.

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Contents Version 1.03 September Eric Roseme Snsl Advanced Technology CenterE0300 Copyright Notices Legal NoticesContents Introduction CIFS/9000 Product Overview ACL File Locking OverviewPage Windows Cifs File Locking ImplementationsPage NFS UnixPC NFS CIFS/9000 File Locking Implementation Mandatory Share Mode Locking Open ModePage Page Page CIFS/9000 File Locking Interoperability Examples Windows only Client Access Local File SystemPage Windows only Client Access NFS Mounted File System Page Windows and Unix Client Access Local File System Page Windows and Unix Client Access NFS Mounted File System Page UNIX/NFS PC-NFS Page Unix PC-NFS Page Clients Page CIFS/9000 Locking Summary Mandatory Share Mode Open Mode CIFS/9000Byte Range Locking OplocksCIFS/9000 Competition Locking Summary Network Appliance Mandatory Share Mode Open ModePage EMC Celerra Mandatory Share Mode Open Mode EMC CelerraPage Mandatory Share Mode Open Mode Auspex NeTservices Auspex NeTservicesPage Veritas File Server Edition Mandatory Share Mode Open Mode Veritas FSEEMC Locking Summary TableCIFS/9000 File Locking Interoperability Summary Page Appendix a smb.conf Examples Smb.conf for Windows-Only AccessSmb.conf for Mixed-Mode Access Determine Locking Requirement Appendix B Sales Tool Locking Technology ExamplesByte Range Locking CIFS/NFS Open Mode Locking CIFS/NFS Open Mode Locking Competitor’s Claims for NFS Non-Locking Protection
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