sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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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Pass BIO_SPEEDUP through all the geom layers

While some geom layers pass unknown commands down, not all do. For the ones that
don't, pass BIO_SPEEDUP down to the providers that constittue the geom,

Pass BIO_SPEEDUP through all the geom layers

While some geom layers pass unknown commands down, not all do. For the ones that
don't, pass BIO_SPEEDUP down to the providers that constittue the geom, as
applicable. No changes to vinum or virstor because I was unsure how to add this
support, and I'm also unsure how to test these. gvinum doesn't implement
BIO_FLUSH either, so it may just be poorly maintained. gvirstor is for testing
and not supportig BIO_SPEEDUP is fine.

Reviewed by: chs
Differential Revision: https://reviews.freebsd.org/D23183

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Merge ^/head r352308 through r352318.

Add a "count_until_fail" option to gnop, which says to start failing
I/O requests after the given number have been allowed though.

Approved by: imp (mentor)
Reviewed by: rpokala kib 0mp mckusi

Add a "count_until_fail" option to gnop, which says to start failing
I/O requests after the given number have been allowed though.

Approved by: imp (mentor)
Reviewed by: rpokala kib 0mp mckusick
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D21593

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GEOM: Reduce unnecessary log interleaving with sbufs

Similar to what was done for device_printfs in r347229.

Convert g_print_bio() to a thin shim around g_format_bio(), which acts on an
sbuf; docum

GEOM: Reduce unnecessary log interleaving with sbufs

Similar to what was done for device_printfs in r347229.

Convert g_print_bio() to a thin shim around g_format_bio(), which acts on an
sbuf; documented in g_bio.9.

Reviewed by: markj
Discussed with: rlibby
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D21165

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gnop: Introduce requests delay.

This allows to simulated disk that is responding slowly to the IO requests.

Reviewed by: markj, bcr, pjd (previous version)
Differential Revision: https://reviews.fr

gnop: Introduce requests delay.

This allows to simulated disk that is responding slowly to the IO requests.

Reviewed by: markj, bcr, pjd (previous version)
Differential Revision: https://reviews.freebsd.org/D21052

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gnop(8): add the ability to set a nop provider's physical path

While I'm here, expand the existing tests a bit.

MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D13579

sys/geom: 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

sys/geom: 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.

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Merge from head

Sponsored by: Gandi.net

Merge from head

Sync up with head up to r289211.

Merge from head

Make geom_nop(4) collect statistics on all types of BIOs, not just
reads and writes.

PR: kern/198405
Submitted by: Matthew D. Fuller <fullermd at over-yonder dot net>
MFC after: 1 month
Sponsored b

Make geom_nop(4) collect statistics on all types of BIOs, not just
reads and writes.

PR: kern/198405
Submitted by: Matthew D. Fuller <fullermd at over-yonder dot net>
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3679

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Merge from head

Sync up with head (up to r288341).

Merge ^/head r287680 through r287877.

Add a way to specify stripesize and stripeoffset to gnop(8). This makes
it possible to "simulate" 4K media, to eg test alignment handling.

Reviewed by: mav@
MFC after: 1 month
Sponsored by: The Free

Add a way to specify stripesize and stripeoffset to gnop(8). This makes
it possible to "simulate" 4K media, to eg test alignment handling.

Reviewed by: mav@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3664

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Merge head

IFC @264767

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

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

Merge GEOM direct dispatch changes from the projects/camlock branch.

When safety requirements are met, it allows to avoid passing I/O requests
to GEOM g_up/g_down thread, executing them directly in

Merge GEOM direct dispatch changes from the projects/camlock branch.

When safety requirements are met, it allows to avoid passing I/O requests
to GEOM g_up/g_down thread, executing them directly in the caller context.
That allows to avoid CPU bottlenecks in g_up/g_down threads, plus avoid
several context switches per I/O.

The defined now safety requirements are:
- caller should not hold any locks and should be reenterable;
- callee should not depend on GEOM dual-threaded concurency semantics;
- on the way down, if request is unmapped while callee doesn't support it,
the context should be sleepable;
- kernel thread stack usage should be below 50%.

To keep compatibility with GEOM classes not meeting above requirements
new provider and consumer flags added:
- G_CF_DIRECT_SEND -- consumer code meets caller requirements (request);
- G_CF_DIRECT_RECEIVE -- consumer code meets callee requirements (done);
- G_PF_DIRECT_SEND -- provider code meets caller requirements (done);
- G_PF_DIRECT_RECEIVE -- provider code meets callee requirements (request).
Capable GEOM class can set them, allowing direct dispatch in cases where
it is safe. If any of requirements are not met, request is queued to
g_up or g_down thread same as before.

Such GEOM classes were reviewed and updated to support direct dispatch:
CONCAT, DEV, DISK, GATE, MD, MIRROR, MULTIPATH, NOP, PART, RAID, STRIPE,
VFS, ZERO, ZFS::VDEV, ZFS::ZVOL, all classes based on g_slice KPI (LABEL,
MAP, FLASHMAP, etc).

To declare direct completion capability disk(9) KPI got new flag equivalent
to G_PF_DIRECT_SEND -- DISKFLAG_DIRECT_COMPLETION. da(4) and ada(4) disk
drivers got it set now thanks to earlier CAM locking work.

This change more then twice increases peak block storage performance on
systems with manu CPUs, together with earlier CAM locking changes reaching
more then 1 million IOPS (512 byte raw reads from 16 SATA SSDs on 4 HBAs to
256 user-level threads).

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

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Merge from head

IFC @ r254014