Catch up with HEAD (r280229-r284686).

MFH: r282615-r283655

Sponsored by: The FreeBSD Foundation

The latest cp tool is trying to use the btrfs clone operation that is
implemented via ioctl interface. First of all return ENOTSUP for this
operation as a cp fallback to usual method in that case. Se

The latest cp tool is trying to use the btrfs clone operation that is
implemented via ioctl interface. First of all return ENOTSUP for this
operation as a cp fallback to usual method in that case. Secondly, do
not print out the message about unimplemented operation.

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Convert signal number to native for VT_SETMODE ioctl and remove
strange and invalid ISSIGVALID macro.
The code has not been tested right way but it was originally broken.

Move FEATURE macros for v4l and v4l2 to the common module.

Differential Revision: https://reviews.freebsd.org/D1075
Reviewed by: emaste

Introduce a new module linux_common.ko which is intended for the
following primary purposes:

1. Remove the dependency of linsysfs and linprocfs modules from linux.ko,
which will be architecture spec

Introduce a new module linux_common.ko which is intended for the
following primary purposes:

1. Remove the dependency of linsysfs and linprocfs modules from linux.ko,
which will be architecture specific on amd64.

2. Incorporate into linux_common.ko general code for platforms on which
we'll support two Linuxulator modules (for both instruction set - 32 & 64 bit).

3. Move malloc(9) declaration to linux_common.ko, to enable getting memory
usage statistics properly.

Currently linux_common.ko incorporates a code from linux_mib.c and linux_util.c
and linprocfs, linsysfs and linux kernel modules depend on linux_common.ko.

Temporarily remove dtrace garbage from linux_mib.c and linux_util.c

Differential Revision: https://reviews.freebsd.org/D1072
In collaboration with: Vassilis Laganakos.

Reviewed by: trasz

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Merge from head@274682

Sync to HEAD@r272516.

IFC @r272185

Remake Linux' SOUND_MIXER_INFO IOCTL as a wrapper around new FreeBSD's one.

Submitted by: Dmitry Luhtionov <dmitryluhtionov@gmail.com>
MFC after: 3 days

IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28

- Add support for SG_GET_SG_TABLESIZE IOCTL to report that we don't support
scatter/gather lists.
- Return error for still unsupported SG 3.x API read/write calls.

MFC after: 1 month

MFC @ r266724

An SVM update will follow this.

Overhaul CAM SG driver IOCTL interfaces.

Make it really work for native FreeBSD programs. Before this it was broken
for years due to different number of pointer dereferences in Linux and
FreeBSD IO

Overhaul CAM SG driver IOCTL interfaces.

Make it really work for native FreeBSD programs. Before this it was broken
for years due to different number of pointer dereferences in Linux and
FreeBSD IOCTL paths, permanently returning errors to FreeBSD programs.
This change breaks the driver FreeBSD IOCTL ABI, making it more strict,
but since it was not working any way -- who bother.

Add shims for 32-bit programs on 64-bit host, translating the argument
of the SG_IO IOCTL for both FreeBSD and Linux ABIs.

With this change I was able to run 32-bit Linux sg3_utils tools and simple
32 and 64-bit FreeBSD test tools on both 32 and 64-bit FreeBSD systems.

MFC after: 1 month

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Merge head

IFC @264767

Merge head up to r263906.

Update kernel inclusions of capability.h to use capsicum.h instead; some
further refinement is required as some device drivers intended to be
portable over FreeBSD versions rely on __FreeBSD_version

Update kernel inclusions of capability.h to use capsicum.h instead; some
further refinement is required as some device drivers intended to be
portable over FreeBSD versions rely on __FreeBSD_version to decide whether
to include capability.h.

MFC after: 3 weeks

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MFC @ r259205 in preparation for some SVM updates. (for real this time)

Merge head r232040 through r258006.

Axe IFF_SMART. Fortunately this layering violating flag was never used,
it was just declared.

Merge head r232040 through r257457.
M usr.sbin/portsnap/portsnap/portsnap.8
M usr.sbin/portsnap/portsnap/portsnap.sh
M usr.sbin/tcpdump/tcpdump/Makefile

The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare
to this event, adding if_var.h to files that do need it. Also, include
all includes that now are included due to implicit po

The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare
to this event, adding if_var.h to files that do need it. Also, include
all includes that now are included due to implicit pollution via if_var.h

Sponsored by: Netflix
Sponsored by: Nginx, Inc.

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Merge head r233826 through r256722.