linuxulator: ignore AT_NO_AUTOMOUNT for all stat variants

Commit ff39d74aa99a ignored AT_NO_AUTOMOUNT for statx(), but did not
change fstat64() or newfstatat(), which also take an equivalent flags
a

linuxulator: ignore AT_NO_AUTOMOUNT for all stat variants

Commit ff39d74aa99a ignored AT_NO_AUTOMOUNT for statx(), but did not
change fstat64() or newfstatat(), which also take an equivalent flags
argument. Add a linux_to_bsd_stat_flags() helper and use it in all
three places.

PR: 281526
Reviewed by: trasz
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D46711

(cherry picked from commit 3cf834d069d1dcdbe464ea74624930eaf916715d)

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linux(4): Remove sys/cdefs.h inclusion where it's not needed due to 685dc743

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

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

linux(4): Use pwd_altroot() to tell namei() about ABI root path

PR: 72920
Differential Revision: https://reviews.freebsd.org/D40090
MFC after: 2 month

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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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linux(4): Uniformly dev_t arguments translation

The two main uses of dev_t are in struct stat and as a parameter of the
mknod system calls.
As of version 2.6.0 of the Linux kernel, dev_t is a 32-bit

linux(4): Uniformly dev_t arguments translation

The two main uses of dev_t are in struct stat and as a parameter of the
mknod system calls.
As of version 2.6.0 of the Linux kernel, dev_t is a 32-bit quantity
with 12 bits set asaid for the major number and 20 for the minor number.
The in-kernel dev_t encoded as MMMmmmmm, where M is a hex digit of the
major number and m is a hex digit of the minor number.
The user-space dev_t encoded as mmmM MMmm, where M and m is the major
and minor numbers accordingly. This is downward compatible with legacy
systems where dev_t is 16 bits wide, encoded as MMmm.
In glibc dev_t is a 64-bit quantity, with 32-bit major and minor numbers,
encoded as MMMM Mmmm mmmM MMmm. This is downward compatible with the Linux
kernel and with legacy systems where dev_t is 16 bits wide.
In the FreeBSD dev_t is a 64-bit quantity. The major and minor numbers
are encoded as MMMmmmMm, therefore conversion of the device numbers between
Linux user-space and FreeBSD kernel required.

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

In between kern_fstat() and translate_fd_major_minor(), another process
having the same filedesc could modify or close fd.

Reviewed by: kib
Differe

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

In between kern_fstat() and translate_fd_major_minor(), another process
having the same filedesc could modify or close fd.

Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D39763

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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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linux(4): Rename obsolete old struct l_stat to struct l_old_stat

linux(4): Move statx_copyout() close to linux_statx()

Just for future changes of the conditional Linuxulator build. We need
a small refactoring of the MI code to help porting Linuxulator to other
pl

linux(4): Move statx_copyout() close to linux_statx()

Just for future changes of the conditional Linuxulator build. We need
a small refactoring of the MI code to help porting Linuxulator to other
platforms.

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linux(4): Move translate_vnhook_major_minor() into the Linux common module

linux(4): Sort includes in the linux_stats.c

linux(4): Cleanup includes under compat/linux

Cleanup unneeded includes, sort the rest according to style(9).
No functional changes.

MFC after: 2 weeks

linux(4): Get rid of the opt_compat.h include.

Since e013e369 COMPAT_LINUX, COMPAT_LINUX32 build options are removed,
so include of opt_compat.h is no more needed.

MFC after: 2 weeks

linux(4): Convert mount exported flags for statfs system calls.

MFC after: 1 week

linux(4): Rework statfs conversion routine.

Rework the routines to convert a native statfs structure (with fixed-size 64-bit
counters) to a Linux statfs structure (with long-sized counters) for 32-b

linux(4): Rework statfs conversion routine.

Rework the routines to convert a native statfs structure (with fixed-size 64-bit
counters) to a Linux statfs structure (with long-sized counters) for 32-bit apps.

Instead of following Linux and return an EOVERFLOW error from statfs() family of
syscalls when actual fs stat value(s) are large enough to not fit into 32 bits,
apply scale logics used by FreeBSD to convert a 5.x statfs structure to a 4.x
statfs structure.

For more details see cc479dda.

Tested by: glebius
MFC after: 1 week

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linux(4): Cleanup empty lines.

MFC after: 2 weeks

linux(4): Add AT_NO_AUTOMOUNT to statx.

Specific to Linux AT_NO_AUTOMOUNT flag tells the kernel to not automount the
terminal component of pathname if it is a directory that is an automount point.
A

linux(4): Add AT_NO_AUTOMOUNT to statx.

Specific to Linux AT_NO_AUTOMOUNT flag tells the kernel to not automount the
terminal component of pathname if it is a directory that is an automount point.
As it is the default for FreeBSD silencly ignore this flag.

glibc-2.34 uses this flag in the stat64 system calls which is used by i386.

Reviewed by: trasz
Differential revision: https://reviews.freebsd.org/D31524
MFC after: 2 weeks

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linux: remove the always curthread argument from lconvpath

linux: improve reporting for unsupported syscall flags

Filter out the flags we do support; previously we would print
out the flag value verbatim.

Reviewed By: dchagin
Sponsored By: EPSRC
Differenti

linux: improve reporting for unsupported syscall flags

Filter out the flags we do support; previously we would print
out the flag value verbatim.

Reviewed By: dchagin
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D30693

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linux: implement statx(2)

PR: 252106
Reviewed By: dchagin
Differential Revision: https://reviews.freebsd.org/D30466

linux: make fstatat(2) handle AT_EMPTY_PATH

Without it, Qt5 apps from Focal fail to start, being unable to load
their plugins. It's also necessary for glibc 2.33, as found in recent
Arch snapshots.

linux: make fstatat(2) handle AT_EMPTY_PATH

Without it, Qt5 apps from Focal fail to start, being unable to load
their plugins. It's also necessary for glibc 2.33, as found in recent
Arch snapshots.

PR: 254112
Reviewed By: kib
Sponsored by: The FreeBSD Foundation, EPSRC
Differential Revision: https://reviews.freebsd.org/D28192

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Fix potential race condition in linux stat(2).

Reviewed by: kib
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25618

compat: clean up empty lines in .c and .h files

vfs: drop the error parameter from vn_isdisk, introduce vn_isdisk_error

Most consumers pass NULL.