usr.bin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

R

usr.bin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

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Remove $FreeBSD$: one-line .c pattern

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

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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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Change "ctlstat -P"'s schema

It now reports stats separately for both ports and luns.

Also, prohibit using both "-p" and "-P" at the same time.

MFC after: 1 week
Sponsored by: Axcient
Reviewed by:

Change "ctlstat -P"'s schema

It now reports stats separately for both ports and luns.

Also, prohibit using both "-p" and "-P" at the same time.

MFC after: 1 week
Sponsored by: Axcient
Reviewed by: mav
Differential Revision: https://reviews.freebsd.org/D38500

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ctlstat: add prometheus output

When invoked by inetd, ctlstat -P will now produce output suitable for
ingestion into Prometheus.

It's a drop-in replacement for https://github.com/Gandi/ctld_exporte

ctlstat: add prometheus output

When invoked by inetd, ctlstat -P will now produce output suitable for
ingestion into Prometheus.

It's a drop-in replacement for https://github.com/Gandi/ctld_exporter,
except that it doesn't report the number of initiators per target, and
it does report time and dma_time.

MFC after: 2 weeks
Sponsored by: Axcient
Relnotes: yes
Reviewed by: bapt, bcr
Differential Revision: https://reviews.freebsd.org/D29901

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MFHead@r345275

MFhead@r344996

Flush stdout after each iteration.

Without this, if output is redirected from the console, it is buffered for
too long, making tool quite unusable.

MFC after: 1 week
Sponsored by: iXsystems, Inc.

Remove hard coded number of lun definition

The number of lun exposed is now exposed via sysctl by the kernel.
Use that number in ctlstat instead of the hardcoded version
Add a backward compatibility

Remove hard coded number of lun definition

The number of lun exposed is now exposed via sysctl by the kernel.
Use that number in ctlstat instead of the hardcoded version
Add a backward compatibility in case the sysctl(2) request fails.

This also allows ctlstat -l 1118 to actually work when having more than
1024 luns.

Reviewed by: avg, manu (both before the backward compatibility addition)
Approved by: avg, manu (both before the backward compatibility addition)
MFC after: 2 weeks
Sponsored by: Gandi.net
Differential Revision: https://reviews.freebsd.org/D13446

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various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

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Make ctlstat -n option work reasonably for sparse LUN list.

MFC after: 2 weeks
Sponsored by: iXsystems, Inc.

Fix JSON output.

MFC after: 1 week

Merge ^/head r311692 through r311807.

Rewrite CTL statistics in more simple and scalable way.

Instead of collecting statistics for each combination of ports and logical
units, that consumed ~45KB per LU with present number of ports, col

Rewrite CTL statistics in more simple and scalable way.

Instead of collecting statistics for each combination of ports and logical
units, that consumed ~45KB per LU with present number of ports, collect
separate statistics for every port and every logical unit separately, that
consume only 176 bytes per each single LU/port. This reduces struct
ctl_lun size down to just 6KB.

Also new IOCTL API/ABI does not hardcode number of LUs/ports, and should
allow handling of very large quantities.

MFC after: 2 weeks (probably keeping old API enabled for some time)

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Merge from head

Sponsored by: Gandi.net

Merge from head

Merge from head

Sync up with head (up to r288341).

Merge ^/head r288035 through r288099.

Bunch of improvements to ctlstat.

Add -p option to allow filtering by ports.
Make -l and -p options work in all modes as filters.
Improve output formatting to better fit columns.

Output times as normal microseconds, rather then in bintime format.

Merge from head

Merge r286744-r287584 from head.

Merge from HEAD

Merge ^/head r286697 through r286857.