[Bug 206238] FUSE can't enter to DIRECT_IO mode during file create.

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206238

            Bug ID: 206238
           Summary: FUSE can't enter to DIRECT_IO mode during file create.
           Product: Base System
           Version: 10.2-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: freebsd at moosefs.com
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

When we want to use direct IO flag it's mostly working ok.
But in very specific situation still uses cache omitting DIRECT FLAG.

This situation appears only when we are creating file.
We suspect that this problem is connected with function:

fuse_vnode_open(vp, 0, td)

in /usr/src/sys/fs/fuse/fuse_fnops.c file.
The second parameter of this function is always set to 0 value and in some
cases removing DIRECT flag set by other functions.

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