Subject: Re: RFC: new mode bits in stat structure
To: Ty Sarna <>
From: Jason Thorpe <>
List: tech-kern
Date: 06/26/1998 11:06:45
On 26 Jun 1998 17:52:31 GMT (Ty Sarna) wrote:

 > Except that the implementation is in userspace. I'm assuming that the system
 > Jason is talking about is essentially similar to what we talked about on
 > tech-kern previously. It's implemented as a vfs layer that mounts over a
 > cache directory and communicates with a daemon process to handle
 > bringing files in from storage.

Well, it's actually currently a mount flag and some goop in FFS, because
various non-technical problems kept it from being implemented as a stacked
VFS like I'd hoped for... eventually, hopefully, the stacked VFS version
will happen.

But other than that, you're correct, the stuff that deals with these
mode bits is entirely in-kernel, and must be, to ensure that Very Bad
Things don't happen.

Jason R. Thorpe                             
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