unlink, rmdir: call notify_upper from VOP pre method instead of syscall

Suppose that there are two or more nullfs mounts over some fs, and
suppose the we unlink a file on one of the nullfs mount.
Th

unlink, rmdir: call notify_upper from VOP pre method instead of syscall

Suppose that there are two or more nullfs mounts over some fs, and
suppose the we unlink a file on one of the nullfs mount.
This way notify_upper get called from the lower vnode as well, allowing
the other nullfs mounts to note that and drop their caches for the
unlinked vnode.

PR: 254210
Reviewed by: olce
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D48825

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open(2): allow O_PATH | O_CREAT

There is no reason to disallow creating the file opened for path.
More, it might be a useful feature together with O_EXCL.

Reviewed by: markj
Sponsored by: The FreeB

open(2): allow O_PATH | O_CREAT

There is no reason to disallow creating the file opened for path.
More, it might be a useful feature together with O_EXCL.

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D48332

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Add fchroot(2)

This is similar to chroot(2), but takes a file descriptor instead
of path. Same syscall exists in NetBSD and Solaris. It is part of a larger
patch to make absolute pathnames usable

Add fchroot(2)

This is similar to chroot(2), but takes a file descriptor instead
of path. Same syscall exists in NetBSD and Solaris. It is part of a larger
patch to make absolute pathnames usable in Capsicum mode, but should
be useful in other contexts too.

Reviewed By: brooks
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D41564

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kern_copy_file_range(): handle rangelock recursion

PR: 281073
Reviewed by: markj
Tested by: lwhsu
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D46465

faccessat(2): Honor AT_SYMLINK_NOFOLLOW

Make the system call honor `AT_SYMLINK_NOFOLLOW`.

Also enable this from `linux_faccessat2` where the issue arised the first time.
Update manual pages accordi

faccessat(2): Honor AT_SYMLINK_NOFOLLOW

Make the system call honor `AT_SYMLINK_NOFOLLOW`.

Also enable this from `linux_faccessat2` where the issue arised the first time.
Update manual pages accordingly.

PR: 275295
Reported by: kenrap@kennethraplee.com
Approved by: kib@
Differential Revision: https://reviews.freebsd.org/D46267

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Add kern_openatfp(9)

Reviewed by: markj, pjd
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D43529

kern_openat(): minor style fixes

Reviewed by: markj, pjd
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D43529

kern_openat(): rename fd argument to dirfd

Reviewed by: markj, pjd
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D43529

Add vnode_pager_clean_{a,}sync(9)

Bump __FreeBSD_version for ZFS use.

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D4

Add vnode_pager_clean_{a,}sync(9)

Bump __FreeBSD_version for ZFS use.

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D43356

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sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl s

sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

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copy_file_range: require CAP_SEEK capability

When using copy_file_range(2) with an offset parameter,
the CAP_SEEK capability should be required.
This requirement is similar to the behavior observed

copy_file_range: require CAP_SEEK capability

When using copy_file_range(2) with an offset parameter,
the CAP_SEEK capability should be required.
This requirement is similar to the behavior observed with
pread(2)/pwrite(2).

Reported by: theraven
Reviewed by: emaste, theraven, kib, markj
Approved by: secteam
Differential Revision: https://reviews.freebsd.org/D41967

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sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Revert "VFS: Remove VV_READLINK flag" and "fdescfs: improve linrdlnk mount option"

This reverts commits 4a402dfe0bc44770c9eac6e58a501e4805e29413 and
3bffa2262328e4ff1737516f176107f607e7bc76.

The fi

Revert "VFS: Remove VV_READLINK flag" and "fdescfs: improve linrdlnk mount option"

This reverts commits 4a402dfe0bc44770c9eac6e58a501e4805e29413 and
3bffa2262328e4ff1737516f176107f607e7bc76.

The fix will be implemented in somewhat different manner. The semantic
adjustment is incompatible with linuxolator expectations.

Reported and reviewed by: dchagin
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D40969

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VFS: Remove VV_READLINK flag

since its only reason to exist is removed.

Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://revie

VFS: Remove VV_READLINK flag

since its only reason to exist is removed.

Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D40700

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fstatat(2): restore AT_EMPTY_PATH handling

Fixes: cb858340dcbf214cc4c4d78dbb741620d7b3a252
Reported by: markj
Sponsored by: The FreeBSD Foundation

linux(4): Add a dedicated statat() implementation

Get rid of calling Linux stat translation hook and specific to Linux
handling of non-vnode dirfd from kern_statat(),

Reviewed by: kib, mjg
Differe

linux(4): Add a dedicated statat() implementation

Get rid of calling Linux stat translation hook and specific to Linux
handling of non-vnode dirfd from kern_statat(),

Reviewed by: kib, mjg
Differential revision: https://reviews.freebsd.org/D35474

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vfs: stop using SAVESTART for rename

ni_startdir has never reached rename routines anyway

Reviewed by: mckusick
Tested by: pho
Differential Revision: https://reviews.freebsd.org/D34468

vfs: introduce V_PCATCH to stop abusing PCATCH

vfs: always retain path buffer after lookup

This removes some of the complexity needed to maintain HASBUF and
allows for removing injecting SAVENAME by filesystems.

Reviewed by: kib (previous versi

vfs: always retain path buffer after lookup

This removes some of the complexity needed to maintain HASBUF and
allows for removing injecting SAVENAME by filesystems.

Reviewed by: kib (previous version)
Differential Revision: https://reviews.freebsd.org/D36542

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vfs: slightly reorganize error handling in chroot

This avoids duplicated NDFREE_NOTHING which will be of importance
later.

vfs: flip a condition around in kern_statat

error tends to be 0.

vfs: plug a dead store in kern_linkat_vp

Reported by: clang --analyze

sysent: Get rid of bogus sys/sysent.h include.

Where appropriate hide sysent.h under proper condition.

MFC after: 2 weeks

vfs: fix copy-pasto in previous

Reported by: dchagin

vfs: call vn_truncate_locked from kern_truncate

This fixes a bug where the syscall would not bump writecount.

PR: 263999