[Bug 299116] reeBSD NFSv4.1 client should use WANT_DELEGATION if it looses delegation due a SETATTR ACL/mode

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 04 Oct 2026 14:32:25 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=299116

            Bug ID: 299116
           Summary: reeBSD NFSv4.1 client should use WANT_DELEGATION if it
                    looses delegation due a SETATTR ACL/mode
           Product: Base System
           Version: 16.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: lionelcons1972@gmail.com

FreeBSD NFSv4.1 client should use WANT_DELEGATION if it looses delegation due a
SETATTR ACL/mode.

Most of the time the FreeBSD NFSv4.1 client serving real-world applications do
NOT have a delegation because of this sequence:
1) request open file, request delegation
2) file is opened, delegation is granted
3) SETATTR for mode or ACL, which triggers the recall of the delegation by the
server
4) client writes data without delegation to the server

The expectation would be that (4) is done with a delegation.

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