Fix intermittency in the sys.fs.fusefs.symlink.main test

This change is identical to 86885b18689 but for symlink instead of
mknod. The kernel sends a FUSE_FORGET asynchronously with the final
sysca

Fix intermittency in the sys.fs.fusefs.symlink.main test

This change is identical to 86885b18689 but for symlink instead of
mknod. The kernel sends a FUSE_FORGET asynchronously with the final
syscall. The lack of an expectation caused this test to occasionally
fail.

Also, remove a sleep that accidentally snuck into a different test.

MFC after: 2 weeks
MFC with: 86885b18689889e9b9142fd31d8c67f21334ba32
Sponsored by: Axcient

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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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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: handle evil servers that return illegal inode numbers

* If during FUSE_CREATE, FUSE_MKDIR, etc the server returns the same
inode number for the new file as for its parent directory, reject

fusefs: handle evil servers that return illegal inode numbers

* If during FUSE_CREATE, FUSE_MKDIR, etc the server returns the same
inode number for the new file as for its parent directory, reject it.
Previously this would triggers a recurse-on-non-recursive lock panic.

* If during FUSE_LINK the server returns a different inode number for
the new name as for the old one, reject it. Obviously, that can't be
a hard link.

* If during FUSE_LOOKUP the server returns the same inode number for the
new file as for its parent directory, reject it. Nothing good can
come of this.

PR: 263662
Reported by: Robert Morris <rtm@lcs.mit.edu>
MFC after: 2 weeks
Reviewed by: pfg
Differential Revision: https://reviews.freebsd.org/D35128

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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: prefer FUSE_ROOT_ID to literal 1 in the tests

Sponsored by: The FreeBSD Foundation

fusefs: make the tests more cplusplusy

* Prefer std::unique_ptr to raw pointers
* Prefer pass-by-reference to pass-by-pointer
* Prefer static_cast to C-style cast, unless it's too much typing

Repor

fusefs: make the tests more cplusplusy

* Prefer std::unique_ptr to raw pointers
* Prefer pass-by-reference to pass-by-pointer
* Prefer static_cast to C-style cast, unless it's too much typing

Reported by: ngie
Sponsored by: The FreeBSD Foundation

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fusefs: Upgrade FUSE protocol to version 7.9.

This commit upgrades the FUSE API to protocol 7.9 and adds unit tests for
backwards compatibility with servers built for version 7.8. It doesn't
implem

fusefs: Upgrade FUSE protocol to version 7.9.

This commit upgrades the FUSE API to protocol 7.9 and adds unit tests for
backwards compatibility with servers built for version 7.8. It doesn't
implement any of 7.9's new features yet.

Sponsored by: The FreeBSD Foundation

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fusefs: clear a dir's attr cache when its contents change

Any change to a directory's contents should cause its mtime and ctime to be
updated by the FUSE daemon. Clear its attribute cache so we'll

fusefs: clear a dir's attr cache when its contents change

Any change to a directory's contents should cause its mtime and ctime to be
updated by the FUSE daemon. Clear its attribute cache so we'll get the new
attributs the next time that they're needed. This affects the following
VOPs: VOP_CREATE, VOP_LINK, VOP_MKDIR, VOP_MKNOD, VOP_REMOVE, VOP_RMDIR, and
VOP_SYMLINK

Reported by: pjdfstest
Sponsored by: The FreeBSD Foundation

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fusefs: adapt the tests to the fuse => fusefs rename

Sponsored by: The FreeBSD Foundation