Yank crufty INTR_FILTER option

It was introduced to the tree in r169320 and r169321 in May 2007.

It never got much use and never became a kernel default. The code
duplicates the default path quite

Yank crufty INTR_FILTER option

It was introduced to the tree in r169320 and r169321 in May 2007.

It never got much use and never became a kernel default. The code
duplicates the default path quite a bit, with slight modifications. Just
yank out the cruft. Whatever goals were being aimed for can probably be met
within the existing framework, without a flag day option.

Mostly mechanical change: 'unifdef -m -UINTR_FILTER'.

Reviewed by: mmacy
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D15546

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Import the netdump client code.

This is a component of a system which lets the kernel dump core to
a remote host after a panic, rather than to a local storage device.
The server component is availab

Import the netdump client code.

This is a component of a system which lets the kernel dump core to
a remote host after a panic, rather than to a local storage device.
The server component is available in the ports tree. netdump is
particularly useful on diskless systems.

The netdump(4) man page contains some details describing the protocol.
Support for configuring netdump will be added to dumpon(8) in a future
commit. To use netdump, the kernel must have been compiled with the
NETDUMP option.

The initial revision of netdump was written by Darrell Anderson and
was integrated into Sandvine's OS, from which this version was derived.

Reviewed by: bdrewery, cem (earlier versions), julian, sbruno
MFC after: 1 month
X-MFC note: use a spare field in struct ifnet
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D15253

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[amdsbwd] teach amdsbwd that it has options

AMDSBWD_DEBUG was previously checked for as a #define but it was not
possible to define it

Reviewed by: kevans
Discussed with: kenm

This commit brings in the TCP high precision timer system (tcp_hpts).
It is the forerunner/foundational work of bringing in both Rack and BBR
which use hpts for pacing out packets. The feature is opt

This commit brings in the TCP high precision timer system (tcp_hpts).
It is the forerunner/foundational work of bringing in both Rack and BBR
which use hpts for pacing out packets. The feature is optional and requires
the TCPHPTS option to be enabled before the feature will be active. TCP
modules that use it must assure that the base component is compile in
the kernel in which they are loaded.

MFC after: Never
Sponsored by: Netflix Inc.
Differential Revision: https://reviews.freebsd.org/D15020

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Retire the geom_aes class

It's had a good life, but it's not really configurable and not really used.

Obtained from: opBSD (with some changes)
Differential Revision: https://reviews.freebsd.org/D14

Retire the geom_aes class

It's had a good life, but it's not really configurable and not really used.

Obtained from: opBSD (with some changes)
Differential Revision: https://reviews.freebsd.org/D14991

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Add an unused _COMPAT_LINUX32 option to ensure opt_compat.h exists on
platforms without COMPAT_LINUX32.

Reported by: kib

Move most of the contents of opt_compat.h to opt_global.h.

opt_compat.h is mentioned in nearly 180 files. In-progress network
driver compabibility improvements may add over 100 more so this is
close

Move most of the contents of opt_compat.h to opt_global.h.

opt_compat.h is mentioned in nearly 180 files. In-progress network
driver compabibility improvements may add over 100 more so this is
closer to "just about everywhere" than "only some files" per the
guidance in sys/conf/options.

Keep COMPAT_LINUX32 in opt_compat.h as it is confined to a subset of
sys/compat/linux/*.c. A fake _COMPAT_LINUX option ensure opt_compat.h
is created on all architectures.

Move COMPAT_LINUXKPI to opt_dontuse.h as it is only used to control the
set of compiled files.

Reviewed by: kib, cem, jhb, jtl
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14941

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Make the TCP blackbox code committed in r331347 be an optional feature
controlled by the TCP_BLACKBOX option.

Enable this as part of amd64 GENERIC. For now, leave it disabled on
other platforms.

Sp

Make the TCP blackbox code committed in r331347 be an optional feature
controlled by the TCP_BLACKBOX option.

Enable this as part of amd64 GENERIC. For now, leave it disabled on
other platforms.

Sponsored by: Netflix, Inc.

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Create a sysctl kern.cam.{,a,n}da.X.invalidate

kern.cam.{,a,n}da.X.invalidate=1 forces *daX to detach by calling
cam_periph_invalidate on the underlying periph. This is for testing
purposes only. In

Create a sysctl kern.cam.{,a,n}da.X.invalidate

kern.cam.{,a,n}da.X.invalidate=1 forces *daX to detach by calling
cam_periph_invalidate on the underlying periph. This is for testing
purposes only. Include only with options CAM_TEST_FAILURE and rename
the former [AN]DA_TEST_FAILURE, and fix nda to compile with it set.
We're using it at work to harden geom and the buffer cache to be
resilient in the face of drive failure. Today, it far too often
results in a panic. While much work was done on SIM initiated removal
for the USB thumnb drive removal work, little has been done for periph
initiated removal. This simulates what *daerror() does for some errors
nicely: we get the same panics with it that we do with failing drives.

Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D14581

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This is an implementation of the client side of TCP Fast Open (TFO)
[RFC7413]. It also includes a pre-shared key mode of operation in
which the server requires the client to be in possession of a sha

This is an implementation of the client side of TCP Fast Open (TFO)
[RFC7413]. It also includes a pre-shared key mode of operation in
which the server requires the client to be in possession of a shared
secret in order to successfully open TFO connections with that server.

The names of some existing fastopen sysctls have changed (e.g.,
net.inet.tcp.fastopen.enabled -> net.inet.tcp.fastopen.server_enable).

Reviewed by: tuexen
MFC after: 1 month
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D14047

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Add support for zstd-compressed user and kernel core dumps.

This works similarly to the existing gzip compression support, but
zstd is typically faster and gives better compression ratios.

Support

Add support for zstd-compressed user and kernel core dumps.

This works similarly to the existing gzip compression support, but
zstd is typically faster and gives better compression ratios.

Support for this functionality must be configured by adding ZSTDIO to
one's kernel configuration file. dumpon(8)'s new -Z option is used to
configure zstd compression for kernel dumps. savecore(8) now recognizes
and saves zstd-compressed kernel dumps with a .zst extension.

Submitted by: cem (original version)
Relnotes: yes
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D13101,
https://reviews.freebsd.org/D13633

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Create deprecation management functions.

gone_in(majar, msg); If we're running in FreeBSD major, tell
the user this code may be deleted soon.
If we're running in FreeBSD major - 1,
the the

Create deprecation management functions.

gone_in(majar, msg); If we're running in FreeBSD major, tell
the user this code may be deleted soon.
If we're running in FreeBSD major - 1,
the the user is deprecated and will
be gone in major.
Otherwise say nothing.

gone_in_dev(dev, major, msg) Just like gone_in, except use device_printf.

New tunable / sysctl debug.oboslete_panic: 0 - don't panic,
1 - panic in major or newer , 2 - panic in major - 1 or newer
default: 0

if NO_OBSOLETE_CODE is defined, then both of these turn into compile
time errors when building for major. Add options NO_OBSOLETE_CODE to
kernel build system.

This lets us tag code that's going away so users know it will be gone,
as well as automatically manage things.

Differential Review: https://reviews.freebsd.org/D13818

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Track Ref / DeRef and Hold / Unhold that da is doing to track down
leaks. We assume each source can be taken / dropped only once and
don't recurse. These are only enabled via DA_TRACK_REFS or
INVARIA

Track Ref / DeRef and Hold / Unhold that da is doing to track down
leaks. We assume each source can be taken / dropped only once and
don't recurse. These are only enabled via DA_TRACK_REFS or
INVARIANTS. There appreas to be a reference leak under extreme load,
and these should help us colaberatively work it out. It also documents
better the reference / holding protocol better.

Reviewed by: ken@, scottl@
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D14040

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Move VM_NUMA_ALLOC and DEVICE_NUMA under the single global config option NUMA.

Sponsored by: Netflix, Dell/EMC Isilon
Discussed with: jhb

Merge ^/head r327341 through r327623.

Connect kern_tslog.c to the build and add TSLOG / TSLOGSIZE kernel options.
These are intended for debugging purposes and should not be added to
"generic" kernel configurations since they result in a

Connect kern_tslog.c to the build and add TSLOG / TSLOGSIZE kernel options.
These are intended for debugging purposes and should not be added to
"generic" kernel configurations since they result in a nontrivial amount
of memory being set aside for this purpose, can break if kernel modules are
unloaded, and can potentially leak a dangerous amount of information about
timestamps used as a source of kernel entropy.

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Merge ^/head r326936 through r327149.

Add a new kernel config option, MD_ROOT_READONLY, which forces on the
MD_READONLY flag for the md device automatically instantiated during
kernel init for an mdroot filesystem.

Note that there is sp

Add a new kernel config option, MD_ROOT_READONLY, which forces on the
MD_READONLY flag for the md device automatically instantiated during
kernel init for an mdroot filesystem.

Note that there is specifically and by design no tunable or sysctl
control over this feature. Without this option, you already have control
over whether the mdroot fs is writeable using vfs.root.mountfrom.options
from loader(8), the root_rw_mount rcvar, and by using "mount -u[rw] /"
or equivelent on the fly. This option is being added to provide a way
to make the mdroot fs truly immutable before userland code begins running.

Differential Revision: https://reviews.freebsd.org/D13411

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Retire SCTP_WITH_NO_CSUM option.

This option was used in the early days to allow performance measurements
extrapolating the use of SCTP checksum offloading. Since this feature
is now available, get

Retire SCTP_WITH_NO_CSUM option.

This option was used in the early days to allow performance measurements
extrapolating the use of SCTP checksum offloading. Since this feature
is now available, get rid of this option.
This also un-breaks the LINT kernel. Thanks to markj@ for making me
aware of the problem.

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Introduce bwn(4) support for the bhnd(4) bus.

Currently, bwn(4) relies on the siba_bwn(4) bus driver to provide support
for the on-chip SSB interconnect found in Broadcom's older PCI(e) Wi-Fi
adapte

Introduce bwn(4) support for the bhnd(4) bus.

Currently, bwn(4) relies on the siba_bwn(4) bus driver to provide support
for the on-chip SSB interconnect found in Broadcom's older PCI(e) Wi-Fi
adapters. Non-PCI Wi-Fi adapters, as well as the newer BCMA interconnect
found in post-2009 Broadcom Wi-Fi hardware, are not supported by
siba_bwn(4).

The bhnd(4) bus driver (also used by the FreeBSD/MIPS Broadcom port)
provides a unified kernel interface to a superset of the hardware supported
by siba_bwn; by attaching bwn(4) via bhnd(4), we can support both modern
PCI(e) Wi-Fi devices based on the BCMA backplane interconnect, as well as
Broadcom MIPS WiSoCs that include a D11 MAC core directly attached to their
SSB or BCMA backplane.

This diff introduces opt-in bwn(4) support for bhnd(4) by providing:

- A small bwn(4) driver subclass, if_bwn_bhnd, that attaches via
bhnd(4) instead of siba_bwn(4).
- A bhndb(4)-based PCI host bridge driver, if_bwn_pci, that optionally
probes at a higher priority than the siba_bwn(4) PCI driver.
- A set of compatibility shims that perform translation of bwn(4)'s
siba_bwn function calls into their bhnd(9) API equivalents when bwn(4)
is attached via a bhnd(4) bus parent. When bwn(4) is attached via
siba_bwn(4), all siba_bwn function calls are simply passed through to
their original implementations.

To test bwn(4) with bhnd(4), place the following lines in loader.conf(5):

hw.bwn_pci.preferred="1"

if_bwn_pci_load="YES
bwn_v4_ucode_load="YES"
bwn_v4_lp_ucode_load="YES"

To verify that bwn(4) is using bhnd(4), you can check dmesg:

bwn0: <Broadcom 802.11 MAC/PHY/Radio, rev 15> ... on bhnd0

... or devinfo(8):

pcib2
pci2
bwn_pci0
bhndb0
bhnd0
bwn0
...

bwn(4)/bhnd(4) has been tested for regressions with most chipsets currently
supported by bwn(4), including:

- BCM4312
- BCM4318
- BCM4321

With minimal changes to the DMA code (not included in this commit), I was
also able to test support for newer BCMA devices by bringing up basic
working Wi-Fi on two previously unsupported, BCMA-based N-PHY chipsets:

- BCM43224
- BCM43225

Approved by: adrian (mentor, implicit)
Sponsored by: The FreeBSD Foundation & Plausible Labs
Differential Revision: https://reviews.freebsd.org/D13041

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Merge ^/head r325842 through r325998.

lockmgr: remove the ADAPTIVE_LOCKMGRS option

The code was never enabled and is very heavy weight.

A revamped adaptive spinning may show up at a later time.

Discussed with: kib

Remove i386 XBOX support.

It is for console presented at 2001 and featuring Pentium III
processor. Even if any of them are still alive and run FreeBSD, we do
not have any sign of life from their us

Remove i386 XBOX support.

It is for console presented at 2001 and featuring Pentium III
processor. Even if any of them are still alive and run FreeBSD, we do
not have any sign of life from their users. While removing another
dozens of #ifdefs from the i386 sources reduces the aversion from
looking at the code and improves the platform vitality.

Reviewed by: cem, pfg, rink (XBOX support author)
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D13016

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Merge ^/head r323559 through r325504.

MFhead@r324837

While here, diff reduce some of the changes in sys/boot by moving
MK_COVERAGE=no to sys/boot/Makefile.inc .