Real-time access of opportunistically locked files without breaking opportunistic locks

At least one non-transitory computer readable storage medium storing a computer program product for accessing opportunistically locked files in real-time from a kernel mode file system filter driver without breaking opportunistic locks, the computer program product comprising:

• program code for monitoring a file system by monitoring file system control codes indicative of opportunistic lock (“oplock”) status;
• program code for detecting a granting of an opportunistic lock to a specific file object referring to a specific underlying file, the granting of the opportunistic lock resulting in the specific file object and the specific underlying file being opportunistically locked;
• program code for caching a reference to the specific opportunistically locked file object;
• program code for filtering, by the kernel mode file system filter driver, a request to access the specific opportunistically locked file via a second file object, the second file object not being opportunistically locked;
• and
• program code for using, by the kernel mode file system filter driver, the cached reference to the specific opportunistically locked file object instead of the second file object to access the specific opportunistically locked underlying file;
• wherein using the cached reference to the specific opportunistically locked file object to access the specific opportunistically locked underlying file further comprises accessing the specific opportunistically locked underlying file in real-time from the kernel mode file system filter driver without breaking the granted opportunistic lock.

A computer system for accessing opportunistically locked files in real-time from a kernel mode file system filter driver without breaking opportunistic locks, the computer system comprising:

• at least one processor;
• computer memory;
• means for monitoring a file system by monitoring file system control codes indicative of opportunistic lock (“oplock”) status;
• means for detecting a granting of an opportunistic lock to a specific file object referring to a specific underlying file, the granting of the opportunistic lock resulting in the specific file object and the specific underlying file being opportunistically locked;
• means for caching a reference to the specific opportunistically locked file object;
• means for filtering, by the kernel mode file system filter driver, a request to access the specific opportunistically locked file via a second file object, the second file object not being opportunistically locked;
• and
• means for using, by the kernel mode file system filter driver, the cached reference to the specific opportunistically locked file object instead of the second file object to access the specific opportunistically locked underlying file;
• wherein using the cached reference to the specific opportunistically locked file object to access the specific opportunistically locked underlying file further comprises accessing the specific opportunistically locked underlying file in real-time from the kernel mode file system filter driver without breaking the granted opportunistic lock.