linux(4): Drop bogus __arm__ condition due to lack of 32-bit arm support

MFC after: 1 month

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

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

linux(4): Rename struct l_ifreq members names to avoid conflicts with FreeBSD

For now we are using mixed names to access struct ifreq members, some
of Linux (ifr_name, ifr_ifindex), others of FreeBS

linux(4): Rename struct l_ifreq members names to avoid conflicts with FreeBSD

For now we are using mixed names to access struct ifreq members, some
of Linux (ifr_name, ifr_ifindex), others of FreeBSD. To avoid conflicts
switch to use FreeBSD names.

Reviewed by: jhibbits
Differential Revision: https://reviews.freebsd.org/D38792

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linux(4): Reduce code duplication between MD files

Move struct ifnet definitions under compat/linux.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D38791

linux(4): Handle IP_ORIGDSTADDR socket option for IPPROTO_IP protocol level

MFC after: 2 weeks

linux(4): Handle SO_TIMESTAMPNS socket option

The SO_TIMESTAMPNS enables or disables the receiving of the SCM_TIMESTAMPNS
control message. The cmsg_data field is a struct timespec.
To distinguish be

linux(4): Handle SO_TIMESTAMPNS socket option

The SO_TIMESTAMPNS enables or disables the receiving of the SCM_TIMESTAMPNS
control message. The cmsg_data field is a struct timespec.
To distinguish between SO_TIMESTAMP and SO_TIMESTAMPNS in the recvmsg()
map the last one to the SO_BINTIME and convert bintime to the timespec.
In the rest, implementation is identical to the SO_TIMESTAMP.

MFC after: 2 weeks

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linux(4): Handle 64-bit SO_TIMESTAMP for 32-bit binaries

To solve y2k38 problem in the recvmsg syscall the new SO_TIMESTAMP
constant were added on v5.1 Linux kernel. So, old 32-bit binaries
that kno

linux(4): Handle 64-bit SO_TIMESTAMP for 32-bit binaries

To solve y2k38 problem in the recvmsg syscall the new SO_TIMESTAMP
constant were added on v5.1 Linux kernel. So, old 32-bit binaries
that knows only 32-bit time_t uses the old value of the constant,
and binaries that knows 64-bit time_t uses the new constant.

To determine what size of time_t type is expected by the user-space,
store requested value (SO_TIMESTAMP) in the process emuldata structure.

MFC after: 2 weeks

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linux(4): For future use move SCM definitions below socket options

MFC after: 2 weeks

linux(4): Handle SO_DOMAIN in getsockopt syscall.

Differential revision: https://reviews.freebsd.org/D34714

linux: recognize TCP_INFO and ratelimit the warning

This ratelimits the "unsupported getsockopt level 6 optname 11"
warnings that happen all the time when watching Netflix.

Sponsored By: EPSRC
Diff

linux: recognize TCP_INFO and ratelimit the warning

This ratelimits the "unsupported getsockopt level 6 optname 11"
warnings that happen all the time when watching Netflix.

Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32454

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linux: add support for SO_PEERGROUPS

The su(8) and sudo(8) from Ubuntu Bionic use it.

Sponsored By: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28165

linux: add support for SO_PEERSEC getsockopt

It returns "unconfined", like Linux without SELinux would.

Sponsored By: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28164

- add more linux socket options (sorted by value)
- map those IPv4 / IPv6 socket options which exist in FreeBSD
+ most of them visually verified to have the same type/layout of arguments
+ not

- add more linux socket options (sorted by value)
- map those IPv4 / IPv6 socket options which exist in FreeBSD
+ most of them visually verified to have the same type/layout of arguments
+ not tested with linux programs to behave as intended
- be more human readable for known options which are not handled
- be more verbose for unhandled socket message flags we know about
- print the jail ID in linux_msg if run in a jail
- add possibility to print debug message about known missing parts only once
- add multiple levels of sysctl linux.debug:
1: print debug messages, tell about unimplemented stuff (only once)
2: like 1, but also print messages about implemented but not tested
stuff (only once)
3+: like 2, but no rate limiting of messages
- increase default linux debug level from 1 to 3

We are a lot more verbose in as we need to be (e.g. some of the IP socket
options which are the same, and share the same memory layout, and are
believed to work). The reason is that we have no good testsuite to test those
linux-bits. The LTP or other test suites like the python one, are not fully
up to the task we need. As such the excessive messages about emulated but not
tested socket options.

IMO any MFC (possible, but most probably not by me) should set the default
debug level to 1.

Discussed with: trasz

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Make linux(4) support SO_PROTOCOL. Running Python test suite
with python3.8 from Focal triggers those.

MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews

Make linux(4) support SO_PROTOCOL. Running Python test suite
with python3.8 from Focal triggers those.

MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25491

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Minor code cleanup; no functional changes.

MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25232

Make linux(4) handle SO_REUSEPORT.

Reviewed by: emaste
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25216

Support SO_SNDBUFFORCE/SO_RCVBUFFORCE by aliasing them to the
standard SO_SNDBUF/SO_RCVBUF. Mostly cosmetics, to get rid
of the warning during 'apt upgrade'.

MFC after: 2 weeks
Sponsored by: The Fr

Support SO_SNDBUFFORCE/SO_RCVBUFFORCE by aliasing them to the
standard SO_SNDBUF/SO_RCVBUF. Mostly cosmetics, to get rid
of the warning during 'apt upgrade'.

MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25173

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linuxulator: implement sendfile

Submitted by: Bora Özarslan <[email protected]>
Submitted by: Yang Wang <[email protected]>
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential

linuxulator: implement sendfile

Submitted by: Bora Özarslan <[email protected]>
Submitted by: Yang Wang <[email protected]>
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19917

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Add TCP_CORK support to linux(4). This fixes one of the things Nginx
trips over.

MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D23171

Add compat.linux.ignore_ip_recverr sysctl. This is a workaround
for missing IP_RECVERR setsockopt(2) support. Without it, DNS
resolution is broken for glibc >= 2.30 (glibc BZ #24047).

From the user

Add compat.linux.ignore_ip_recverr sysctl. This is a workaround
for missing IP_RECVERR setsockopt(2) support. Without it, DNS
resolution is broken for glibc >= 2.30 (glibc BZ #24047).

From the user point of view this fixes "yum update" on recent
CentOS 8.

MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D23234

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Our bsd_to_linux_sockaddr() and linux_to_bsd_sockaddr() functions
alter the userspace sockaddr to convert the format between linux and BSD versions.
That's the minimum 3 of copyin/copyout operations

Our bsd_to_linux_sockaddr() and linux_to_bsd_sockaddr() functions
alter the userspace sockaddr to convert the format between linux and BSD versions.
That's the minimum 3 of copyin/copyout operations for one syscall.

Also some syscall uses linux_sa_put() and linux_getsockaddr() when load
sockaddr to userspace or from userspace accordingly.

To avoid this chaos, especially converting sockaddr in the userspace,
rewrite these 4 functions to convert sockaddr only in kernel and leave
only 2 of this functions.

Also in order to reduce duplication between MD parts of the Linuxulator put
struct sockaddr conversion functions that are MI out into linux_common module.

PR: 232920
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20157

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Linuxolator whitespace cleanup

A version of each of the MD files by necessity exists for each CPU
architecture supported by the Linuxolator. Clean these up so that new
architectures do not inherit

Linuxolator whitespace cleanup

A version of each of the MD files by necessity exists for each CPU
architecture supported by the Linuxolator. Clean these up so that new
architectures do not inherit whitespace issues.

Clean up shared Linuxolator files while here.

Sponsored by: Turing Robotic Industries Inc.

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sys/compat: further 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 - er

sys/compat: further 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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To reduce code duplication move socket defines to the MI path.

MFC after: 1 week

Hide Linux socketcall constants under corresponding #ifdef since
they are used only in i386 Linuxulator.

MFC after: 1 week