src/sys/netinet/khelp, branch releng/14.0 FreeBSD source tree sys: Remove $FreeBSD$: one-line .c pattern 2023-08-16T17:54:36+00:00 Warner Losh imp@FreeBSD.org 2023-08-16T17:54:36+00:00 685dc743dc3b5645e34836464128e1c0558b404b Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/ 
Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
sys: Remove $FreeBSD$: two-line .h pattern 2023-08-16T17:54:11+00:00 Warner Losh imp@FreeBSD.org 2023-08-16T17:54:11+00:00 95ee2897e98f5d444f26ed2334cc7c439f9c16c6 Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/ 
Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/
spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD 2023-05-12T16:44:03+00:00 Warner Losh imp@FreeBSD.org 2023-05-10T15:40:58+00:00 4d846d260e2b9a3d4d0a701462568268cbfe7a5b The SPDX folks have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 
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
tcp: provide macros to access inpcb and socket from a tcpcb 2022-11-08T18:24:40+00:00 Gleb Smirnoff glebius@FreeBSD.org 2022-11-08T18:24:40+00:00 9eb0e8326d0fe73ae947959c1df327238d3b2d53 There should be no functional changes with this commit. Reviewed by: rscheff Differential revision: https://reviews.freebsd.org/D37123 
There should be no functional changes with this commit.

Reviewed by:		rscheff
Differential revision:	https://reviews.freebsd.org/D37123
khelp(9): Fix a typo in a source code comment 2022-04-02T12:10:59+00:00 Gordon Bergling gbe@FreeBSD.org 2022-04-02T12:09:08+00:00 8d30ef92d59567d47a1fee9dc71baf17a555234d - s/measurment/measurement/ MFC after: 3 days 
- s/measurment/measurement/

MFC after:	3 days
sys: general adoption of SPDX licensing ID tags. 2017-11-27T15:23:17+00:00 Pedro F. Giffuni pfg@FreeBSD.org 2017-11-27T15:23:17+00:00 fe267a559009cbf34f9341666fe4d88a92c02d5e 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. 
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.
Remove "long" variables from the TCP stack (not including the modular 2016-10-06T16:28:34+00:00 Jonathan T. Looney jtl@FreeBSD.org 2016-10-06T16:28:34+00:00 3ac125068a211377f0b3817c37cf1db95a87e8fb congestion control framework). Reviewed by: gnn, lstewart (partial) Sponsored by: Juniper Networks, Netflix Differential Revision: (multiple) Tested by: Limelight, Netflix 
congestion control framework).

Reviewed by:	gnn, lstewart (partial)
Sponsored by:	Juniper Networks, Netflix
Differential Revision:	(multiple)
Tested by:	Limelight, Netflix
The TCP PAWS fix for kernels with fast tick rates (r231767) changed the TCP 2012-08-17T01:49:51+00:00 Lawrence Stewart lstewart@FreeBSD.org 2012-08-17T01:49:51+00:00 ee24d3b8401985c99a4a1755765fe9332daee568 timestamp related stack variables to reference ms directly instead of ticks. The h_ertt(4) Khelp module relies on TCP timestamp information in order to calculate its enhanced RTT estimates, but was not updated as part of r231767. Consequently, h_ertt has not been calculating correct RTT estimates since r231767 was comitted, which in turn broke all delay-based congestion control algorithms because they rely on the h_ertt RTT estimates. Fix the breakage by switching h_ertt to use tcp_ts_getticks() in place of all previous uses of the ticks variable. This ensures all timestamp related variables in h_ertt use the same units as the TCP stack and therefore results in meaningful comparisons and RTT estimate calculations. Reported & tested by: Naeem Khademi (naeemk at ifi uio no) Discussed with: bz MFC after: 3 days 
timestamp related stack variables to reference ms directly instead of ticks.
The h_ertt(4) Khelp module relies on TCP timestamp information in order to
calculate its enhanced RTT estimates, but was not updated as part of r231767.

Consequently, h_ertt has not been calculating correct RTT estimates since
r231767 was comitted, which in turn broke all delay-based congestion control
algorithms because they rely on the h_ertt RTT estimates.

Fix the breakage by switching h_ertt to use tcp_ts_getticks() in place of all
previous uses of the ticks variable. This ensures all timestamp related
variables in h_ertt use the same units as the TCP stack and therefore results in
meaningful comparisons and RTT estimate calculations.

Reported & tested by:	Naeem Khademi (naeemk at ifi uio no)
Discussed with:	bz
MFC after:	3 days
Use the full and proper company name for Swinburne University of Technology 2011-04-12T08:13:18+00:00 Lawrence Stewart lstewart@FreeBSD.org 2011-04-12T08:13:18+00:00 891b8ed4672a213bbe6f3f10522eeadb34d01b76 throughout the source tree. Requested by: Grenville Armitage, Director of CAIA at Swinburne University of Technology MFC after: 3 days 
throughout the source tree.

Requested by:	Grenville Armitage, Director of CAIA at Swinburne University of
			Technology
MFC after:	3 days
Import the ERTT (Enhanced Round Trip Time) Khelp module. ERTT uses the 2011-01-24T23:08:38+00:00 Lawrence Stewart lstewart@FreeBSD.org 2011-01-24T23:08:38+00:00 050570efa79efcc9cf5adeb545f1a679c8dc377b Khelp/Hhook KPIs to hook into the TCP stack and maintain a per-connection, low noise estimate of the instantaneous RTT. ERTT's implementation is robust even in the face of delayed acknowledgements and/or TSO being in use for a connection. A high quality, low noise RTT estimate is a requirement for applications such as delay-based congestion control, for which we will be importing some algorithm implementations shortly. In collaboration with: David Hayes <dahayes at swin edu au> and Grenville Armitage <garmitage at swin edu au> Sponsored by: FreeBSD Foundation Reviewed by: bz and others along the way MFC after: 3 months 
Khelp/Hhook KPIs to hook into the TCP stack and maintain a per-connection, low
noise estimate of the instantaneous RTT. ERTT's implementation is robust even in
the face of delayed acknowledgements and/or TSO being in use for a connection.

A high quality, low noise RTT estimate is a requirement for applications such as
delay-based congestion control, for which we will be importing some algorithm
implementations shortly.

In collaboration with:	David Hayes <dahayes at swin edu au> and
				Grenville Armitage <garmitage at swin edu au>
Sponsored by:	FreeBSD Foundation
Reviewed by:	bz and others along the way
MFC after:	3 months