linux: Improve debugging by recognizing TIOCGPTPEER

Sponsored By: EPSRC

sys/compat: Use C99 fixed-width integer types.

No functional change.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D33632

linux: Partially implement TCSBRK

This fixes tcflush(3), unbreaking cheribuild.py under arm64 Focal.

Reviewed By: imp
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D32291

Make MAXPHYS tunable. Bump MAXPHYS to 1M.

Replace MAXPHYS by runtime variable maxphys. It is initialized from
MAXPHYS by default, but can be also adjusted with the tunable kern.maxphys.

Make b_pag

Make MAXPHYS tunable. Bump MAXPHYS to 1M.

Replace MAXPHYS by runtime variable maxphys. It is initialized from
MAXPHYS by default, but can be also adjusted with the tunable kern.maxphys.

Make b_pages[] array in struct buf flexible. Size b_pages[] for buffer
cache buffers exactly to atop(maxbcachebuf) (currently it is sized to
atop(MAXPHYS)), and b_pages[] for pbufs is sized to atop(maxphys) + 1.
The +1 for pbufs allow several pbuf consumers, among them vmapbuf(),
to use unaligned buffers still sized to maxphys, esp. when such
buffers come from userspace (*). Overall, we save significant amount
of otherwise wasted memory in b_pages[] for buffer cache buffers,
while bumping MAXPHYS to desired high value.

Eliminate all direct uses of the MAXPHYS constant in kernel and driver
sources, except a place which initialize maxphys. Some random (and
arguably weird) uses of MAXPHYS, e.g. in linuxolator, are converted
straight. Some drivers, which use MAXPHYS to size embeded structures,
get private MAXPHYS-like constant; their convertion is out of scope
for this work.

Changes to cam/, dev/ahci, dev/ata, dev/mpr, dev/mpt, dev/mvs,
dev/siis, where either submitted by, or based on changes by mav.

Suggested by: mav (*)
Reviewed by: imp, mav, imp, mckusick, scottl (intermediate versions)
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D27225

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linux(4): Quiesce unrecognized ioctl warning for F2FS query

On Linux, sqlite probes for underlying F2FS filesystems that support
certain kinds of atomic update with this ioctl. The expected result

linux(4): Quiesce unrecognized ioctl warning for F2FS query

On Linux, sqlite probes for underlying F2FS filesystems that support
certain kinds of atomic update with this ioctl. The expected result on
non-F2FS filesystem (i.e., all FreeBSD filesystems) is any error value.

Minimally implement the ioctl and avoid the warning message.

(This shows up in Linux Chrome, which embeds sqlite.)

Reviewed by: emaste, trasz
Differential Revision: https://reviews.freebsd.org/D27050

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linux(4): Deduplicate ioctl range construction with a helper macro

No functional change.

Reviewed by: emaste, trasz
Differential Revision: https://reviews.freebsd.org/D27049

linux(4): Disambiguate identical ioctl errors in distinct paths

And stop truncating the full ioctl number in the error message.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.or

linux(4): Disambiguate identical ioctl errors in distinct paths

And stop truncating the full ioctl number in the error message.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D27048

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Add support for SOUND_MIXER_WRITE_MONITOR ioctl. Fixes alsamixer(1)
on my x220.

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

Add support for SOUND_MIXER_WRITE_MONITOR ioctl. Fixes alsamixer(1)
on my x220.

Reviewed by: emaste
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25806

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Add emulation support for the Linux kcov(4) ioctl API.

This makes it possible to run an unmodified Linux syzkaller executor
against the Linuxulator, and have it gather code coverage information.

Sp

Add emulation support for the Linux kcov(4) ioctl API.

This makes it possible to run an unmodified Linux syzkaller executor
against the Linuxulator, and have it gather code coverage information.

Sponsored by: The FreeBSD Foundation

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compat: clean up empty lines in .c and .h files

MFH

Sponsored by: Rubicon Communications, LLC (netgate.com)

Make linux(4) support the BLKPBSZGET ioctl. Oracle uses it.

MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25694

linux: fix ioctl performance for termios

TCGETS et al are frequently issued by Linux binaries while the previous code
avoidably ping-pongs a global sx lock and serializes on Giant.

Note that even w

linux: fix ioctl performance for termios

TCGETS et al are frequently issued by Linux binaries while the previous code
avoidably ping-pongs a global sx lock and serializes on Giant.

Note that even with the fix the common case will serialize on a per-tty lock.

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Centralize compatability translation macros.

Copy the CP, PTRIN, etc macros from freebsd32.h into a sys/abi_compat.h
and replace existing definitation with includes where required. This
eliminates d

Centralize compatability translation macros.

Copy the CP, PTRIN, etc macros from freebsd32.h into a sys/abi_compat.h
and replace existing definitation with includes where required. This
eliminates duplicate code and allows Linux and FreeBSD compatability
headers to be included in the same files.

Input from: cem, jhb
Obtained from: CheriBSD
MFC after: 2 weeks
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D24275

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Merge ^/head r358832 through r358848.

Add support for the device statistics IOCTL, needed by the coming
linux_libusb upgrade.

MFC after: 3 days
Sponsored by: Mellanox Technologies

Implement Linux BLKGETSIZE64 ioctl.

MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation

Add a hack to make ^T work for Linux binaries, enabled with
'compat.linux.preserve_vstatus=1' sysctl.

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

Add a hack to make ^T work for Linux binaries, enabled with
'compat.linux.preserve_vstatus=1' sysctl.

MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21967

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MFHead @r350386

Sponsored by: The FreeBSD Foundation

Return ENOTSUP for Linux FS_IOC_FIEMAP ioctl.

Linux man(1) calls it for no good reason; this avoids the console spam
(eg '(man): ioctl fd=4, cmd=0x660b ('f',11) is not implemented').

Reviewed by: e

Return ENOTSUP for Linux FS_IOC_FIEMAP ioctl.

Linux man(1) calls it for no good reason; this avoids the console spam
(eg '(man): ioctl fd=4, cmd=0x660b ('f',11) is not implemented').

Reviewed by: emaste
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D20690

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Remove the CDIOCREADSUBCHANNEL_SYSSPACE ioctl.

This was added for emulation of Linux's CDROMSUBCHNL, but allows
users with read access to a cd(4) device to overwrite kernel memory
provided that the

Remove the CDIOCREADSUBCHANNEL_SYSSPACE ioctl.

This was added for emulation of Linux's CDROMSUBCHNL, but allows
users with read access to a cd(4) device to overwrite kernel memory
provided that the driver detects some media present.

Reimplement CDROMSUBCHNL by bouncing the data from CDIOCREADSUBCHANNEL
through the linux_cdrom_subchnl structure passed from userspace.

admbugs: 768
Reported by: Alex Fortune
Security: CVE-2019-5602
Security: FreeBSD-SA-19:11.cd_ioctl

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MFHead @348740

Sponsored by: The FreeBSD Foundation

MFHead @347527

Sponsored by: The FreeBSD Foundation

Linuxulator depends on a fundamental kernel settings such as SMP. Many
of them listed in opt_global.h which is not generated while building
modules outside of a kernel and such modules never match re

Linuxulator depends on a fundamental kernel settings such as SMP. Many
of them listed in opt_global.h which is not generated while building
modules outside of a kernel and such modules never match real cofigured
kernel.

So, we should prevent our users from building obviously defective modules.

Therefore, remove the root cause of the building of modules outside of a
kernel - the possibility of building modules with DEBUG or KTR flags.
And remove all of DEBUG printfs as it is incomplete and in threaded
programms not informative, also a half of system call does not have DEBUG
printf. For debuging Linux programms we have dtrace, ktr and ktrace ability.

PR: 222861
Reviewed by: trasz
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20178

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In order to reduce duplication between MD parts of the Linuxulator
move bits that are MI out into the headers in compat/linux.
For that remove bogus _packed attribute from struct l_sockaddr
and use M

In order to reduce duplication between MD parts of the Linuxulator
move bits that are MI out into the headers in compat/linux.
For that remove bogus _packed attribute from struct l_sockaddr
and use MI types for struct members.

And continue to move into the linux_common module a code that is
intended for both Linuxulator modules (both instruction set - 32 & 64 bit)
or for external modules like linsysfs or linprocfs.

To avoid header pollution introduce new sys/compat/linux_common.h header.

Reviewed by: emaste
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20137

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