Its a common misconception that a directory that to be empty to become a junction folder / symbolic link directory. Just make an alternative data stream on the directory a symbolic link and the entire directory transforms:pic.twitter.com/HzYvgtlo78
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I prefer to just create an oplocked file in destination dir with same name as the rename will create. On oplock trigger I rename the oplock file to another directory and make the directory into a junction folder- then I acknowledge the trigger.
Not many people are aware that when oplock triggers we are in a weird quantum state where we can still change the outcome. We cannot delete the oplocked file, but by renaming it to other directory we get the same effect. So we can actually trigger an oplock on a file
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and move it away so the the opener gets a nu such file. As it never was there. Using that you can make real oplocks that pause the caller on a file named the same as a directory. On trigger you switch the directory in instead with rename operations :)
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But my favorite is to oplock a file in a directory- on oplock trigger rename it away, the make the folder a junction folder targetting "RPC Control" where I have a symlink with same name as file :) Using this we can also have a folder that supports dir listing. But on file open
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