tests: Add pjdfstest integration

Use ATF to wrap the new reimplementation of pjdfstest that came out of
GSOC 2022, now available in the ports tree as filesystems/pjdfstest.

So far I added tests for

tests: Add pjdfstest integration

Use ATF to wrap the new reimplementation of pjdfstest that came out of
GSOC 2022, now available in the ports tree as filesystems/pjdfstest.

So far I added tests for UFS (with several different option
combinations), tmpfs and ZFS, plus ZFS+nullfs. All of these create a
memory disk, initialize the filesystem, and point the pjdfstest
executable at it.

In the future it would be good to add tests for at least NFS and p9fs.

Reviewed by: asomers
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D56605

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unionfs: Support renaming symbolic links

This adds support for renaming a symbolic link found on the lower fs,
which necessitates copying it to the upper fs, as well as basic tests.

MFC after: 1 we

unionfs: Support renaming symbolic links

This adds support for renaming a symbolic link found on the lower fs,
which necessitates copying it to the upper fs, as well as basic tests.

MFC after: 1 week
Sponsored by: Klara, Inc.
Sponsored by: NetApp, Inc.
Reviewed by: olce, siderop1_netapp.com, jah
Differential Revision: https://reviews.freebsd.org/D54229

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Remove residual blank line at start of Makefile

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Add tarfs, a filesystem backed by tarballs.

Sponsored by: Juniper Networks, Inc.
Sponsored by: Klara, Inc.
Reviewed by: pauamma, imp
Differential Revision: https://reviews.freebsd.org/D37753

tests/sys/fs: remove mips workaround

MIPS is gone, so we no longer require this check.

Reviewed by: imp, asomers
Differential Revision: https://reviews.freebsd.org/D36566

Refine fusefs test workaround for mips+llvm

This re-enables building the googletest suite by default on mips and instead
specifically doesn't build fusefs tests for mips+clang builds. clang will
ea

Refine fusefs test workaround for mips+llvm

This re-enables building the googletest suite by default on mips and instead
specifically doesn't build fusefs tests for mips+clang builds. clang will
easily spent >= 1.5 hours compiling a single file due to a bug in
optimization (see LLVM PR 43263), so turn these off for now while that's
hashed out.

GCC builds are unaffected and build the fusefs tests as-is. Clang builds
only happen by early adopters attempting to hash out the remaining issues.

The comment has been updated to reflect its new position and use less strong
wording about imposing on people.

Discussed with: ngie, asomers
Reviewed by: ngie

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Fix the build with WITHOUT_GOOGLETEST

Attempting to build the fusefs tests WITHOUT_GOOGLETEST will result in an
error if the host system or sysroot doesn't already have googletest headers
in /usr/in

Fix the build with WITHOUT_GOOGLETEST

Attempting to build the fusefs tests WITHOUT_GOOGLETEST will result in an
error if the host system or sysroot doesn't already have googletest headers
in /usr/include/private (e.g. host built/installed WITHOUT_GOOGLETEST, clean
cross-buildworld WITHOUT_GOOGLETEST).

Reviewed by: asomers
Differential Revision: https://reviews.freebsd.org/D21367

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fusefs: misc build fixes

* Only build the tests on platforms with C++14 support
* Fix an undefined symbol error on lint builds
* Remove an unused function: fiov_clear

Sponsored by: The FreeBSD Foun

fusefs: misc build fixes

* Only build the tests on platforms with C++14 support
* Fix an undefined symbol error on lint builds
* Remove an unused function: fiov_clear

Sponsored by: The FreeBSD Foundation

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

Sponsored by: The FreeBSD Foundation

Begin a fuse(4) test suite

It only tests the kernel portion of fuse, not the userspace portion (which
comes from sysutils/fusefs-libs). The kernel-userspace interface is
de-facto standardized, and

Begin a fuse(4) test suite

It only tests the kernel portion of fuse, not the userspace portion (which
comes from sysutils/fusefs-libs). The kernel-userspace interface is
de-facto standardized, and this test suite seeks to validate FreeBSD's
implementation.

It uses GoogleMock to substitute for a userspace daemon and validate the
kernel's behavior in response to filesystem access. GoogleMock is
convenient because it can validate the order, number, and arguments of each
operation, and return canned responses.

But that also means that the test suite must use GoogleTest, since
GoogleMock is incompatible with atf-c++ and atf.test.mk does not allow C++
programs to use atf-c.

This commit adds the first 10 test cases out of an estimated 130 total.

PR: 235775, 235773
Sponsored by: The FreeBSD Foundation

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Integrate contrib/netbsd-tests/fs/tmpfs into the FreeBSD test suite
as tests/sys/fs

These testcases exercise tmpfs support

MFC after: 2 weeks
Sponsored by: Dell EMC Isilon