rc.d/linux: Attempt to mount only if necessary

Currently, if the linux service is run twice, mount(8) fails with:

mount: linprocfs: Device busy
mount: linsysfs: Device busy
mount: devfs

rc.d/linux: Attempt to mount only if necessary

Currently, if the linux service is run twice, mount(8) fails with:

mount: linprocfs: Device busy
mount: linsysfs: Device busy
mount: devfs: Device busy
mount: fdescfs: Device busy
mount: tmpfs: Device busy

It is a bit more user-friendly if before running mount(8) the service
checks if there are any file systems left to be mounted. This patch
implements this behavior.

Also, while here, create mount points directories (as suggested by
otis).

Reviewed by: trasz
Approved by: trasz (src)
Differential Revision: https://reviews.freebsd.org/D32463

(cherry picked from commit 5690261858b6bd8f7d09eda2ae74f3def2d69a01)

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rc: make the 'linux' script explicitly load filesystem modules

This removes a minor annoyance with Linux jails, where you often
want linux_mounts_enable="NO", yet you want those filesystems
availabl

rc: make the 'linux' script explicitly load filesystem modules

This removes a minor annoyance with Linux jails, where you often
want linux_mounts_enable="NO", yet you want those filesystems
available for mounting in jails; normally mount(8) would result
in kernel automatically loading the KLD, but this doesn't work
inside jails or chroots.

PR: 242955
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D29725

(cherry picked from commit 45aec46246fe61a3f45cf7da1c80850dc226f609)

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Fix the 'linux' rc script on aarch64.

Previously it would try to load linux.ko instead of linux64.ko
and fail. While here, don't try to match 'linuxaout'; even if
implemented, it's the same module

Fix the 'linux' rc script on aarch64.

Previously it would try to load linux.ko instead of linux64.ko
and fail. While here, don't try to match 'linuxaout'; even if
implemented, it's the same module as `linuxelf`.

Reviewed By: emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D29288

(cherry picked from commit e026f4243c5a65d19a63d98f55be17e8294a1e87)

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Don't check compat.linux.emul_path before loading linux(4)

Fix e40787f900f to make libexec/rc/rc.d/linux retrieve the sysctl
after loading the kernel module which provides it, not before.

Reported

Don't check compat.linux.emul_path before loading linux(4)

Fix e40787f900f to make libexec/rc/rc.d/linux retrieve the sysctl
after loading the kernel module which provides it, not before.

Reported By: jkim
Sponsored By: The FreeBSD Foundation

(cherry picked from commit 07cac176fba947381c8111b8e02e8067e7fa542a)

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Use compat.linux.emul_path instead of hardcoded path in /etc/rc.d/linux

In /etc/rc.d/linux the mounting paths of procfs, sysfs and devfs
are hardcoded to "/compat/linux". Switching to the content o

Use compat.linux.emul_path instead of hardcoded path in /etc/rc.d/linux

In /etc/rc.d/linux the mounting paths of procfs, sysfs and devfs
are hardcoded to "/compat/linux". Switching to the content of
compat.linux.emul_path sysctl would allow to switch linuxulator
to different place.

Submitted by: freebsdnewbie_freenet.de
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D27807

(cherry picked from commit e40787f900f3c262d5134d342e5a16757dd2193c)

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Make the linux rc script use linrdlnk by default.

This fixes Linux gettyname(3), with caveats (see PR).

PR: kern/240767
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revisio

Make the linux rc script use linrdlnk by default.

This fixes Linux gettyname(3), with caveats (see PR).

PR: kern/240767
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25558

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Add 'linux_mounts_enable' rc.conf(5) variable, to make it possible
to disable mounting Linux-specific filesystems under /compat/linux
when 'linux_enable' is set to YES.

Reviewed by: netchild, ian (e

Add 'linux_mounts_enable' rc.conf(5) variable, to make it possible
to disable mounting Linux-specific filesystems under /compat/linux
when 'linux_enable' is set to YES.

Reviewed by: netchild, ian (earlier version)
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D22320

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Extend the linux rc script to mount the neccessary file systems,
set ELF fallback brand, and load pty(4).

Reviewed by: emaste (earlier version)
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundatio

Extend the linux rc script to mount the neccessary file systems,
set ELF fallback brand, and load pty(4).

Reviewed by: emaste (earlier version)
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21874

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Add rcvar back to the linux rc script. Without it it was enabled
unconditionally.

Reported by: Michael Butler <imb at protected-networks dot net>
MFC after: 2 weeks
Sponsored by: The FreeBSD Founda

Add rcvar back to the linux rc script. Without it it was enabled
unconditionally.

Reported by: Michael Butler <imb at protected-networks dot net>
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation

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Rename etc/rc.d/abi to etc/rc.d/linux; after moving out the SysV IPC stuff
it's entirely linux-specific.

Reviewed by: emaste
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revi

Rename etc/rc.d/abi to etc/rc.d/linux; after moving out the SysV IPC stuff
it's entirely linux-specific.

Reviewed by: emaste
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21830

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