cuse: Use NULL for SYSUNINIT's last arg, which is a pointer type

MFC after: 3 days

kern: Make fileops and filterops tables const where possible

No functional change intended.

MFC after: 1 week

sys: Remove $FreeBSD$: one-line .c comment pattern

Remove /^/[*/]\s*\$FreeBSD\$.*\n/

cuse(3): Cosmetic change about testing boolean values.

No functional change intended.

Differential Revision: https://reviews.freebsd.org/D36633
Suggested by: jrtc27@ and avg@
MFC after: 1 week
Spon

cuse(3): Cosmetic change about testing boolean values.

No functional change intended.

Differential Revision: https://reviews.freebsd.org/D36633
Suggested by: jrtc27@ and avg@
MFC after: 1 week
Sponsored by: NVIDIA Networking

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cuse(3): Optimise small reads and writes.

When doing small reads and writes use an intermediate buffer to store the
data to save locking the remote process to access data.

Reviewed by: imp @
Differ

cuse(3): Optimise small reads and writes.

When doing small reads and writes use an intermediate buffer to store the
data to save locking the remote process to access data.

Reviewed by: imp @
Differential Revision: https://reviews.freebsd.org/D36633
MFC after: 1 week
Sponsored by: NVIDIA Networking

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cuse(3): Use bool type for boolean value instead of int type.

No functional change intended.

Reviewed by: imp @
Differential Revision: https://reviews.freebsd.org/D36633
MFC after: 1 week
Sponsored

cuse(3): Use bool type for boolean value instead of int type.

No functional change intended.

Reviewed by: imp @
Differential Revision: https://reviews.freebsd.org/D36633
MFC after: 1 week
Sponsored by: NVIDIA Networking

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cuse(3): Allow shared memory allocations up to, but excluding 2 GBytes.

Currently the cuse(3) mmap(2) offset is split into 128 banks of 16 Mbytes.
Allow cuse(3) to make allocations that span multipl

cuse(3): Allow shared memory allocations up to, but excluding 2 GBytes.

Currently the cuse(3) mmap(2) offset is split into 128 banks of 16 Mbytes.
Allow cuse(3) to make allocations that span multiple banks at the expense
of any fragmentation issues that may arise. Typically mmap(2) buffers are
well below 16 Mbytes. This allows 8K video resolution to work using webcamd.

Reviewed by: markj @
Differential Revision: https://reviews.freebsd.org/D35830
MFC after: 1 week
Sponsored by: NVIDIA Networking

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cuse(3): Fix an off-by-one.

The page allocation limit is inclusive and not exclusive.

MFC after: 1 week
Sponsored by: NVIDIA Networking

cuse(3): Remove PAGE_SIZE from libcuse.

To allow for a dynamic page size on arm64 remove the static value from libcuse.

Differential Revision: https://reviews.freebsd.org/D35585
MFC after: 1 week
S

cuse(3): Remove PAGE_SIZE from libcuse.

To allow for a dynamic page size on arm64 remove the static value from libcuse.

Differential Revision: https://reviews.freebsd.org/D35585
MFC after: 1 week
Sponsored by: NVIDIA Networking

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Fix for loading cuse.ko via rc.d . Make sure we declare the cuse(3)
module by name and not only by the version information, so that
"kldstat -q -m cuse" works.

Found by: Goran Mekic <meka@tilda.cen

Fix for loading cuse.ko via rc.d . Make sure we declare the cuse(3)
module by name and not only by the version information, so that
"kldstat -q -m cuse" works.

Found by: Goran Mekic <meka@tilda.center>
MFC after: 1 week
Sponsored by: Mellanox Technologies // NVIDIA Networking

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

MFH

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

cuse: Stop checking for failures from malloc(M_WAITOK).

PR: 240545
Submitted by: Andrew Reiter <arr@watson.org>
Reviewed by: hselasky
MFC after: 1 week
Differential Revision: https://reviews.freebs

cuse: Stop checking for failures from malloc(M_WAITOK).

PR: 240545
Submitted by: Andrew Reiter <arr@watson.org>
Reviewed by: hselasky
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25765

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Fine grain locking inside the cuse(3) kernel module.

Implement one mutex per cuse(3) server instance which also cover the
clients belonging to the given server instance.

This should significantly r

Fine grain locking inside the cuse(3) kernel module.

Implement one mutex per cuse(3) server instance which also cover the
clients belonging to the given server instance.

This should significantly reduce the mutex congestion inside the
cuse(3) kernel module when multiple servers are in use.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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MFHead @349476

Sponsored by: The FreeBSD Foundation

Free all allocated unit IDs in cuse(3) after the client character
devices have been destroyed to avoid creating character devices with
identical name.

MFC after: 1 week
Sponsored by: Mellanox Techno

Free all allocated unit IDs in cuse(3) after the client character
devices have been destroyed to avoid creating character devices with
identical name.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Fix for deadlock situation in cuse(3)

The final server unref should be done by the server thread to prevent
deadlock in the client cdevpriv destructor, which cannot destroy
itself.

MFC after: 1 wee

Fix for deadlock situation in cuse(3)

The final server unref should be done by the server thread to prevent
deadlock in the client cdevpriv destructor, which cannot destroy
itself.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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MFHead @347527

Sponsored by: The FreeBSD Foundation

Implement flag for telling cuse(3) clients if the peer is running in 32-bit
compat mode or not. This is useful when implementing compatibility ioctl(2)
handlers in userspace.

MFC after: 1 week
Spon

Implement flag for telling cuse(3) clients if the peer is running in 32-bit
compat mode or not. This is useful when implementing compatibility ioctl(2)
handlers in userspace.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Use NULL for SYSINIT's last arg, which is a pointer type

Sponsored by: The FreeBSD Foundation

Move most of the contents of opt_compat.h to opt_global.h.

opt_compat.h is mentioned in nearly 180 files. In-progress network
driver compabibility improvements may add over 100 more so this is
close

Move most of the contents of opt_compat.h to opt_global.h.

opt_compat.h is mentioned in nearly 180 files. In-progress network
driver compabibility improvements may add over 100 more so this is
closer to "just about everywhere" than "only some files" per the
guidance in sys/conf/options.

Keep COMPAT_LINUX32 in opt_compat.h as it is confined to a subset of
sys/compat/linux/*.c. A fake _COMPAT_LINUX option ensure opt_compat.h
is created on all architectures.

Move COMPAT_LINUXKPI to opt_dontuse.h as it is only used to control the
set of compiled files.

Reviewed by: kib, cem, jhb, jtl
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14941

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Merge ^/head r323559 through r325504.

MFhead@r325383

Allow CUSE(3) to free all memory mapped memory by using regular SWAP objects
instead of malloc(). The SWAP objects are automagically freed when there are no
more consumers. This greatly simplifies th

Allow CUSE(3) to free all memory mapped memory by using regular SWAP objects
instead of malloc(). The SWAP objects are automagically freed when there are no
more consumers. This greatly simplifies the mmap logic inside CUSE(3) in the
kernel. This change fixes an issue where mmapped memory can accumulate and never
get freed, if many different mmap sizes are needed over time. Further this
change fixes memory leaks when the CUSE(3) kernel module is unloaded.

While at it make sure the CUSE_ALLOC_PAGES_MAX limit is treated as an exclusive
limit. CUSE(3) memory maps must be less than CUSE_ALLOC_PAGES_MAX number of pages.

Reviewed by: kib @
Differential Revision: https://reviews.freebsd.org/D11392
Sponsored by: Mellanox Technologies
MFC after: 1 week

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MFhead@r324482