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FreeBSD src
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a6b55ee6be
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Gleb Smirnoff a6b55ee6be net: replace IFF_KNOWSEPOCH with IFF_NEEDSEPOCH 
Expect that drivers call into the network stack with the net epoch
entered. This has already been the fact since early 2020. The net
interrupts, that are marked with INTR_TYPE_NET, were entering epoch
since 511d1afb6b. For the taskqueues there is NET_TASK_INIT() and
all drivers that were known back in 2020 we marked with it in
6c3e93cb5a. However in e87c494015 we took conservative approach
and preferred to opt-in rather than opt-out for the epoch.

This change not only reverts e87c494015 but adds a safety belt to
avoid panicing with INVARIANTS if there is a missed driver. With
INVARIANTS we will run in_epoch() check, print a warning and enter
the net epoch.  A driver that prints can be quickly fixed with the
IFF_NEEDSEPOCH flag, but better be augmented to properly enter the
epoch itself.

Note on TCP LRO: it is a backdoor to enter the TCP stack bypassing
some layers of net stack, ignoring either old IFF_KNOWSEPOCH or the
new IFF_NEEDSEPOCH.  But the tcp_lro_flush_all() asserts the presence
of network epoch.  Indeed, all NIC drivers that support LRO already
provide the epoch, either with help of INTR_TYPE_NET or just running
NET_EPOCH_ENTER() in their code.

Reviewed by:		zlei, gallatin, erj
Differential Revision:	https://reviews.freebsd.org/D39510
2023-04-17 09:08:35 -07:00
.cirrus-ci Cirrus-CI: add some timing info on pkg install failure 2021-08-04 15:02:00 -04:00
.github Vendor import of OpenSSH 9.3p1 2023-03-16 08:41:22 -04:00
bin date.1: Make sure that the example works in any locale 2023-04-13 13:02:20 +02:00
cddl zfsd: add support for hotplugging spares 2023-04-06 11:58:55 -06:00
contrib sqlite3: Vendor import of sqlite3 3.41.2 2023-04-17 09:02:41 -07:00
crypto ssh: update FREEBSD-upgrade for upstream CheckHostIP default change 2023-03-29 19:32:44 -04:00
etc libcasper: Move helper libraries from /lib/casper to /lib. 2023-03-29 15:04:28 -07:00
gnu gnu diff3: apply patch to committed src, rather than at build time 2022-11-13 21:33:40 -05:00
include Fixes in persistent error log 2023-03-28 16:51:58 -07:00
kerberos5 heimdal: Do not build a redundant source file 2023-04-01 19:18:05 -07:00
lib libveriexec: add function to check a label based on a path 2023-04-17 11:47:33 -04:00
libexec rtld: fixes for handling of the grouped options 2023-04-13 17:37:33 +03:00
release release: Remove "All Rights Reserved" from FreeBSD Foundation copyrights 2023-04-17 10:56:59 -04:00
rescue rescue: Fix link order of SSL libraries and fetch. 2023-02-02 09:23:02 -08:00
sbin veriexec: Add SPDX-License-Identifier 2023-04-16 21:23:00 -04:00
secure ssh: Update to OpenSSH 9.3p1 2023-03-16 10:29:55 -04:00
share Update meta mode makefiles 2023-04-16 18:40:53 -07:00
stand loader: lua: disable autoboot timer after password entry 2023-04-15 21:39:56 -05:00
sys net: replace IFF_KNOWSEPOCH with IFF_NEEDSEPOCH 2023-04-17 09:08:35 -07:00
targets retire sconfig(8) ce(4)/cp(4) configuration tool 2022-12-13 15:25:13 -05:00
tests Testing: add framework for the kernel unit tests. 2023-04-14 15:47:55 +00:00
tools stress2: Added comment about a new panic found. Test both SU and SU+J. 2023-04-14 09:55:10 +02:00
usr.bin morse.6: Mention to standards in the SEE ALSO section 2023-04-16 11:46:09 +02:00
usr.sbin makefs: remove unused variable 2023-04-17 08:22:12 -04:00
.arcconfig arcanist: use FreeBSD/git project repository instead of FreeBSD/svn 2022-08-23 14:16:41 +00:00
.arclint
.cirrus.yml CI: Run pkgbase METALOG lint script 2023-03-14 21:13:46 -04:00
.clang-format clang-format: Add bitset loop macros 2021-09-21 12:08:01 -04:00
.git-blame-ignore-revs Add git-blame ignore file 2023-01-23 15:27:25 -05:00
.gitattributes
.gitignore .gitignore: Ignore LSP generated .cache 2023-03-07 10:04:18 -05:00
CONTRIBUTING.md CONTRIBUTING.md: Fix checkstyle9.pl name 2023-03-27 16:23:13 -04:00
COPYRIGHT Happy New Year 2023! 2023-01-01 13:44:43 +08:00
LOCKS
MAINTAINERS MAINTAINERS: Remove myself from OpenSSL maintenance 2023-03-28 15:44:26 -04:00
Makefile Remove the riscv64sf architecture. 2023-04-12 11:09:27 -07:00
Makefile.inc1 Stop stripping 'sf' suffixes from architecture names. 2023-04-12 11:11:02 -07:00
Makefile.libcompat libcompat: avoid installing include files twice 2022-11-16 19:15:20 -05:00
Makefile.sys.inc
ObsoleteFiles.inc Add libcap_netdb.so.1 to the list of libcasper helper libraries. 2023-03-30 14:54:48 -07:00
README.md Vendor import of OpenSSH 9.3p1 2023-03-16 08:41:22 -04:00
RELNOTES RELNOTES: Add entries for two new NFS features 2023-04-16 12:34:52 -07:00
UPDATING UPDATING: Document arm video devices renaming. 2023-03-17 13:35:03 +01:00

README.md

FreeBSD Source:

This is the top level of the FreeBSD source directory.

FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.

For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.

The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), FreeBSD handbook on building userland, and Handbook for kernels for more information, including setting make(1) variables.

For information on the CPU architectures and platforms supported by FreeBSD, see the FreeBSD website's Platforms page.

Source Roadmap:

Directory Description
bin System/user commands.
cddl Various commands and libraries under the Common Development and Distribution License.
contrib Packages contributed by 3rd parties.
crypto Cryptography stuff (see crypto/README).
etc Template files for /etc.
gnu Commands and libraries under the GNU General Public License (GPL) or Lesser General Public License (LGPL). Please see gnu/COPYING and gnu/COPYING.LIB for more information.
include System include files.
kerberos5 Kerberos5 (Heimdal) package.
lib System libraries.
libexec System daemons.
release Release building Makefile & associated tools.
rescue Build system for statically linked /rescue utilities.
sbin System commands.
secure Cryptographic libraries and commands.
share Shared resources.
stand Boot loader sources.
sys Kernel sources (see sys/README.md).
targets Support for experimental DIRDEPS_BUILD
tests Regression tests which can be run by Kyua. See tests/README for additional information.
tools Utilities for regression testing and miscellaneous tasks.
usr.bin User commands.
usr.sbin System administration commands.

For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see FreeBSD Handbook.