[Bug 266886] [FUSEFS] Handling of l_whence with fcntl(F_GETLK)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=266886

--- Comment #5 from commit-hook@FreeBSD.org ---
A commit in branch stable/12 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=311f68079ff29aabd594c6fbdc97c2bff5d91ba5

commit 311f68079ff29aabd594c6fbdc97c2bff5d91ba5
Author:     Alan Somers <asomers@FreeBSD.org>
AuthorDate: 2022-10-11 23:00:07 +0000
Commit:     Alan Somers <asomers@FreeBSD.org>
CommitDate: 2022-10-20 16:24:19 +0000

    fusefs: After successful F_GETLK, l_whence should be SEEK_SET

    PR:             266886
    Reported by:    John Millikin <jmillikin@gmail.com>
    Reviewed by:    emaste
    Differential Revision: https://reviews.freebsd.org/D37014

    (cherry picked from commit 3c3b906b54236841d813fd9a01b1e090f39558ea)

    fusefs: fix VOP_ADVLOCK with SEEK_END

    When the user specifies SEEK_END, unlike SEEK_CUR, VOP_ADVLOCK must
    adjust lock offsets itself.

    Sort-of related to bug 266886.

    Reviewed by:    emaste
    Differential Revision: https://reviews.freebsd.org/D37040

    (cherry picked from commit f6e5319550f60170840f1a07a9cbdd45b5014a21)

    Approved by:    kib (re)

 sys/fs/fuse/fuse_vnops.c      |  34 +++++++-
 tests/sys/fs/fusefs/locks.cc  | 191 +++++++++++++++++++++++++++++++++++++++++-
 tests/sys/fs/fusefs/mockfs.cc |  14 +++-
 3 files changed, 234 insertions(+), 5 deletions(-)

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