[Bug 239830] [FUSEFS]: fusefs doesn't send the entire fuse_getattr_in structure

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239830

--- Comment #2 from commit-hook at freebsd.org ---
A commit references this bug:

Author: asomers
Date: Wed Aug 14 20:45:01 UTC 2019
New revision: 351042
URL: https://svnweb.freebsd.org/changeset/base/351042

Log:
  fusefs: Fix the size of fuse_getattr_in

  In FUSE protocol 7.9, the size of the FUSE_GETATTR request has increased.
  However, the fusefs driver is currently not sending the additional fields.
  In our implementation, the additional fields are always zero, so I there
  haven't been any test failures until now.  But fusefs-lkl requires the
  request's length to be correct.

  Fix this bug, and also enhance the test suite to catch similar bugs.

  PR:           239830
  MFC after:    2 weeks
  MFC-With:     350665
  Sponsored by: The FreeBSD Foundation

Changes:
  head/sys/fs/fuse/fuse_internal.c
  head/tests/sys/fs/fusefs/getattr.cc
  head/tests/sys/fs/fusefs/mockfs.cc
  head/tests/sys/fs/fusefs/mockfs.hh

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