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getdirentriesattr usage in the FInder

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getdirentriesattr usage in the FInder

Subject: getdirentriesattr usage in the FInder
From: Timo Naroska <email@hidden>
Date: Tue, 6 May 2008 19:21:55 +0200

Hi,

I'm implementing a VFS plug-in. In order to improve the Finder performance on our volumes I would like to support the getdirentriesattr call. For testing purposes I added a dummy vnop_readdirattr implementation to my FS that always returns an empty list. I also set the VOL_CAP_INT_READDIRATTR flag in the volume capabilities. With this change I can call getdirentriesattr() from a test programm and get an empty list as expected. The Finder however does not use the getdirentriesattr() on my volumes, but still calls getdirentries() followed by stat()/ getxattr() calls for each file.

What is the missing piece to make the Finder use the more advanced getdirentriesattr() call? Do I have to support a specific minimum set of getattrlist() attributes? Do I have to support volfs?

Any help is appreciated.

Best,
Timo
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