fusefs: minor cleanup in the tests

Delete some unused includes and member variables.

MFC after: 2 weeks
Sponsored by: ConnectWise

Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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fusefs: fix two bugs regarding VOP_RECLAIM of the root inode

* We never send FUSE_LOOKUP for the root inode, since its inode number
is hard-coded to 1. Therefore, we should not send FUSE_FORGET f

fusefs: fix two bugs regarding VOP_RECLAIM of the root inode

* We never send FUSE_LOOKUP for the root inode, since its inode number
is hard-coded to 1. Therefore, we should not send FUSE_FORGET for it,
lest the server see its lookup count fall below 0.

* During VOP_RECLAIM, if we are reclaiming the root inode, we must clear
the file system's vroot pointer. Otherwise it will be left pointing
at a reclaimed vnode, which will cause future VOP_LOOKUP operations to
fail. Previously we only cleared that pointer during VFS_UMOUNT. I
don't know of any real-world way to trigger this bug.

MFC after: 2 weeks
Reviewed by: pfg
Differential Revision: https://reviews.freebsd.org/D34753

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fusefs: move common code from forget.cc to utils.cc

MFC after: 2 weeks

fusefs: in the tests, always assume debug.try_reclaim_vnode is available

In an earlier version of the revision that created that sysctl (D20519)
the sysctl was gated by INVARIANTS, so the test had t

fusefs: in the tests, always assume debug.try_reclaim_vnode is available

In an earlier version of the revision that created that sysctl (D20519)
the sysctl was gated by INVARIANTS, so the test had to check for it.
But in the committed version it is always available.

MFC after: 2 weeks

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Merge ^/head r364082 through r364250.

MFH

Sponsored by: Rubicon Communications, LLC (netgate.com)

fusefs: fix the FUSE_FORGET unit test after r364064

Thanks to r364064, the name cache now returns a hit where previously it
would miss. Adjust the expectations accordingly.

PR: 248583
Reported by

fusefs: fix the FUSE_FORGET unit test after r364064

Thanks to r364064, the name cache now returns a hit where previously it
would miss. Adjust the expectations accordingly.

PR: 248583
Reported by: lwhsu
MFC with: r364064

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fusefs: add SVN Keywords to the test files

Reported by: SVN pre-commit hooks
MFC after: 15 days
MFC-With: r350665
Sponsored by: The FreeBSD Foundation

fusefs: merge from projects/fuse2

This commit imports the new fusefs driver. It raises the protocol level
from 7.8 to 7.23, fixes many bugs, adds a test suite for the driver, and
adds many new featu

fusefs: merge from projects/fuse2

This commit imports the new fusefs driver. It raises the protocol level
from 7.8 to 7.23, fixes many bugs, adds a test suite for the driver, and
adds many new features. New features include:

* Optional kernel-side permissions checks (-o default_permissions)
* Implement VOP_MKNOD, VOP_BMAP, and VOP_ADVLOCK
* Allow interrupting FUSE operations
* Support named pipes and unix-domain sockets in fusefs file systems
* Forward UTIME_NOW during utimensat(2) to the daemon
* kqueue support for /dev/fuse
* Allow updating mounts with "mount -u"
* Allow exporting fusefs file systems over NFS
* Server-initiated invalidation of the name cache or data cache
* Respect RLIMIT_FSIZE
* Try to support servers as old as protocol 7.4

Performance enhancements include:

* Implement FUSE's FOPEN_KEEP_CACHE and FUSE_ASYNC_READ flags
* Cache file attributes
* Cache lookup entries, both positive and negative
* Server-selectable cache modes: writethrough, writeback, or uncached
* Write clustering
* Readahead
* Use counter(9) for statistical reporting

PR: 199934 216391 233783 234581 235773 235774 235775
PR: 236226 236231 236236 236291 236329 236381 236405
PR: 236327 236466 236472 236473 236474 236530 236557
PR: 236560 236844 237052 237181 237588 238565
Reviewed by: bcr (man pages)
Reviewed by: cem, ngie, rpokala, glebius, kib, bde, emaste (post-commit
review on project branch)
MFC after: 3 weeks
Relnotes: yes
Sponsored by: The FreeBSD Foundation
Pull Request: https://reviews.freebsd.org/D21110

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fusefs: fix a memory leak in the forget test

Sponsored by: The FreeBSD Foundation

fusefs: add some explicit tests for FUSE_FORGET

Sponsored by: The FreeBSD Foundation