Re: struct file reference at VFS level

[Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost>]

   Date: Fri, 22 Apr 2016 09:10:23 +0000
   From: Emmanuel Dreyfus <manu%netbsd.org@localhost>

   On Wed, Apr 20, 2016 at 07:09:12AM -0400, Greg Troxel wrote:
   > I am not following this.   My basic issue is that while I see your point
   > about open files in FUSE being different, I don't see how that's
   > different from multiple open files in any other filesystem.
   > 
   > What specific flags are you talking about, and can you explain why a
   > FUSE vfs implementation would need to know but say UFS would not?

   I talked to the glusterFS developer that hit the problem about the 
   requirement. This is to iplement mandatory locks, a feature not available 
   in UFS.

Why is this file-system-specific?

Can you share a pointer to the relevant logic?