MFC r345350, r346441, r346765

r345350:
Rename fuse(4) to fusefs(4)

This makes it more consistent with other filesystems, which all end in "fs",
and more consistent with its mount helper, which is a

MFC r345350, r346441, r346765

r345350:
Rename fuse(4) to fusefs(4)

This makes it more consistent with other filesystems, which all end in "fs",
and more consistent with its mount helper, which is already named
"mount_fusefs".

Reviewed by: cem, rgrimes
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19649

r346441:
Use symlinks for kernel modules rather than hardlinks

When aliasing a kernel module to a different name (ie if_igb for if_em),
it's better to use symlinks than hard links. kldxref will omit entries for
the links, ensuring that the loaded module has the correct name.

Reviewed by: imp
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19979

r346765:
Don't symlink fusefs.ko to fuse.ko on PPC

Some PPC systems (PowerNV) use msdosfs for /boot, which can't handle either
symlinks or hardlinks. So on PPC, copy the module instead. This change fixes
installkernel on such systems after r345350.

Reported by: Brandon Bergren <git_bdragon.rtk0.net>
Reviewed by: jhibbits, rgrimes
MFC-With: 345350, 346441
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19993

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MFC r350591, r350971, r351724

r350591:
Add a driver for Texas Instruments ADS101x/ADS111x i2c ADC chips.

Instances of the device can be configured using hints or FDT data.

Interfaces to reconfigur

MFC r350591, r350971, r351724

r350591:
Add a driver for Texas Instruments ADS101x/ADS111x i2c ADC chips.

Instances of the device can be configured using hints or FDT data.

Interfaces to reconfigure the chip and extract voltage measurements from
it are available via sysctl(8).

r350971:
Fix the driver name in ads111x.4, and hook the manpage up to the build.

The driver was originally written with the name ads1115, but at the last
minute it got renamed to ads111x to reflect its support for many related
chips, but I forgot to update the manpage to match the renaming before
committing it all.

r351724:
Fix the name of the devicetree bindings document file cited in the manpage.

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MFC r349319, r349328-r349330

r349319:
Add some i2c slave-device drivers that were missing from NOTES.

r349328:
The gpiopps(4) driver currently has probe and attach code only for FDT based
systems,

MFC r349319, r349328-r349330

r349319:
Add some i2c slave-device drivers that were missing from NOTES.

r349328:
The gpiopps(4) driver currently has probe and attach code only for FDT based
systems, so conditionalize it accordingly in conf/files.

r349329:
Add gpio(4) and related drivers to NOTES.

r349330:
Add pwm devices to NOTES.

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MFC r347285 and r347327:
Initial version of Mellanox in-kernel firmware upgrade support.

Submitted by: slavash@
Sponsored by: Mellanox Technologies

MFC r346544:
Clarify the relationship between INVARIANTS and DIAGNOSTIC a bit.

MFC r345680: NOTES: Use non-default value for BOOT_TAG

MFC r344479 (by sobomax), r344605:
Modularize xz.

MFC r344702: There is no `device atacard` but there is `device atapccard`.

MFC r344198:
GC ATA_REQUEST_TIMEOUT option remnants

It was removed from code in r249083 and from sys/conf/options in r249213.

PR: 193935, 222170

MFC r343617, r343618:
Make iflib a loadable module.

Remove the Yarrow PRNG algorithm option in accordance with due notice
given in random(4).

This includes updating of the relevant man pages, and no-longer-used
harvesting parameters.

Ensure that the

Remove the Yarrow PRNG algorithm option in accordance with due notice
given in random(4).

This includes updating of the relevant man pages, and no-longer-used
harvesting parameters.

Ensure that the pseudo-unit-test still does something useful, now also
with the "other" algorithm instead of Yarrow.

PR: 230870
Reviewed by: cem
Approved by: so(delphij,gtetlow)
Approved by: re(marius)
Differential Revision: https://reviews.freebsd.org/D16898

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KASSERT: Make runtime optionality optional

Add an option, KASSERT_PANIC_OPTIONAL, that allows runtime KASSERT()
behavior changes. When this option is not enabled, code that allows
KASSERTs to becom

KASSERT: Make runtime optionality optional

Add an option, KASSERT_PANIC_OPTIONAL, that allows runtime KASSERT()
behavior changes. When this option is not enabled, code that allows
KASSERTs to become optional is not enabled, and all violated assertions
cause termination.

The runtime KASSERT behavior was added in r243980.

One important distinction here is that panic has __dead2
("attribute((noreturn))"), while kassert_panic does not. Static analyzers
like Coverity understand __dead2. Without it, KASSERTs go misunderstood,
resulting in many false positives that result from violation of program
invariants.

Reviewed by: jhb, jtl, np, vangyzen
Relnotes: yes
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D16835

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BOOT_TAG: Make a config(5) option, expose as sysctl and loader tunable

BOOT_TAG lived shortly in sys/msgbuf.h, but this wasn't necessarily great
for changing it or removing it. Move it into subr_prf

BOOT_TAG: Make a config(5) option, expose as sysctl and loader tunable

BOOT_TAG lived shortly in sys/msgbuf.h, but this wasn't necessarily great
for changing it or removing it. Move it into subr_prf.c and add options for
it to opt_printf.h.

One can specify both the BOOT_TAG and BOOT_TAG_SZ (really, size of the
buffer that holds the BOOT_TAG). We expose it as kern.boot_tag and also add
a loader tunable by the same name that we'll fetch upon initialization of
the msgbuf.

This allows for flexibility and also ensures that there's a consistent way
to figure out the boot tag of the running kernel, rather than relying on
headers to be in-sync.

Prodded super-super-lightly by: imp

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Remove jedec_ts(4)

The jedec_ts(4) driver has been marked as deprecated in stable/11, and is
now being removed from -HEAD. Add a notice in UPDATING, and update the few
remaining references (regardin

Remove jedec_ts(4)

The jedec_ts(4) driver has been marked as deprecated in stable/11, and is
now being removed from -HEAD. Add a notice in UPDATING, and update the few
remaining references (regarding jedec_dimm(4)'s compatibility and history)
to reflect the fact that jedec_ts(4) is now deleted.

Reviewed by: avg
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D16537

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Make it possible to run ntpd as a non-root user, add ntpd uid and gid.

Code analysis and runtime analysis using truss(8) indicate that the only
privileged operations performed by ntpd are adjusting

Make it possible to run ntpd as a non-root user, add ntpd uid and gid.

Code analysis and runtime analysis using truss(8) indicate that the only
privileged operations performed by ntpd are adjusting system time, and
(re-)binding to privileged UDP port 123. These changes add a new mac(4)
policy module, mac_ntpd(4), which grants just those privileges to any
process running with uid 123.

This also adds a new user and group, ntpd:ntpd, (uid:gid 123:123), and makes
them the owner of the /var/db/ntp directory, so that it can be used as a
location where the non-privileged daemon can write files such as the
driftfile, and any optional logfile or stats files.

Because there are so many ways to configure ntpd, the question of how to
configure it to run without root privs can be a bit complex, so that will be
addressed in a separate commit. These changes are just what's required to
grant the limited subset of privs to ntpd, and the small change to ntpd to
prevent it from exiting with an error if running as non-root.

Differential Revision: https://reviews.freebsd.org/D16281

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Add various spi devices to NOTES. Add some required options for building
the cqspi and n25q drivers.

Incorporate bus and chip select numbers into spigen(4) cdev names. Rather
than assigning spigen device names in order of creation, this uses a device
name that corresponds to the owning spibus and c

Incorporate bus and chip select numbers into spigen(4) cdev names. Rather
than assigning spigen device names in order of creation, this uses a device
name that corresponds to the owning spibus and chip-select index.

Example: /dev/spigen0.1 would be a child of spibus0, and use cs = 1

The intent is for systems like Raspberry Pi to have a consistent way of
using an SPI interface with a specific cs value from a user application.
Otherwise, there is no consistent way of knowing which cs pin will be
assigned to a particular spigen device. The alternative is to specify
everything in "the right order" in an overlay file, which is less than
ideal. Additionally, this duplicates (to some extent) the way Linux handles
a similar situation with their 'spidev' device, so it would be somewhat
familiar to those who also use Linux.

A new kernel config option, SPIGEN_LEGACY_CDEVNAME, causes the driver to
also create /dev/spigenN device name aliases, with N incrementing in the
order of device instantiation. This is provided to ease the transition
for existing systems using the original naming convention (particularly
when these changes are MFC'd to stable branches).

Differential Revision: https://reviews.freebsd.org/D15301

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Add a note about using option VERBOSE_SYSINIT=0 to get the verbose code
compiled in but disabled by default.

unbreak LINT build after r334804

md: use prestaged mfs_root

On PowerNV systems, the rootfs is passed through kexec, which loads the rootfs
into memory and set two fdt entries to describe where the file is located in
the memory;

I

md: use prestaged mfs_root

On PowerNV systems, the rootfs is passed through kexec, which loads the rootfs
into memory and set two fdt entries to describe where the file is located in
the memory;

I need to pass this memory region to the md device as a mfs_root, but, current
md driver does not support two things:

* Just getting a pointer from an external (bootloader) memory. If I need to
workaround it, I would need to declare a static array and memcopy from this
external memory to this static variable.

* The size of the image. The usage of mfs_root_end, which is not a pointer,
seems to be not possible for this prestaged scenario.

This patch simply adds a new way to load mfs_root from memory.

Differential Revision: https://reviews.freebsd.org/D15625
Approved by: kib, jhibbits (mentor)

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Improve defaults for per-CPU kernel console colors, especially with 2
or 4 CPUs. Add a compile-time option SC_KERNEL_CONS_ATTRS to control the
defaults.

Default to color numbers in reverse order to

Improve defaults for per-CPU kernel console colors, especially with 2
or 4 CPUs. Add a compile-time option SC_KERNEL_CONS_ATTRS to control the
defaults.

Default to color numbers in reverse order to CPU numbers (instead of
in the same order with white first and wrapping to dark grey), so that
the brightest bright colors are used first. Don't use dark grey at all;
replace it by dark green.

Syscons has too many compile-time options, but this one is needed in
in case the defaults give something like white on white, or the user
really hates this feature and can't wait to turn it off in rc.

MFC after: next release?

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Reduce overhead of entropy collection

- move harvest mask check inline
- move harvest mask to frequently_read out of actively
modified cache line
- disable ether_input collection and describe its

Reduce overhead of entropy collection

- move harvest mask check inline
- move harvest mask to frequently_read out of actively
modified cache line
- disable ether_input collection and describe its limitations
in NOTES

Typically entropy collection in ether_input was stirring zero
in to the entropy pool while at the same time greatly reducing
max pps. This indicates that perhaps we should more closely
scrutinize how much entropy we're getting from a given source
as well as what our actual entropy collection needs are for
seeding Yarrow.

Reviewed by: cem, gallatin, delphij
Approved by: secteam
Differential Revision: https://reviews.freebsd.org/D15526

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Retire vxge(4).

This driver was merged to HEAD one week prior to Exar publicly announcing they
had left the Ethernet market. It is not known to be used and has various code
quality issues spotted by

Retire vxge(4).

This driver was merged to HEAD one week prior to Exar publicly announcing they
had left the Ethernet market. It is not known to be used and has various code
quality issues spotted by Brooks and Hiren. Retire it in preparation for
FreeBSD 12.0.

Submitted by: kbowling
Reviewed by: brooks imp
Relnotes: yes
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D15442

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nxge(4):
Remove nxge(4) and associated man page and tools in FreeBSD 12.0.

Submitted by: kbowling
Reviewed by: brooks
Relnotes: yes
Sponsored by: Limelight Networks
Differential Revision: https://re

nxge(4):
Remove nxge(4) and associated man page and tools in FreeBSD 12.0.

Submitted by: kbowling
Reviewed by: brooks
Relnotes: yes
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D1529

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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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