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# SPDX-License-Identifier: GPL-2.0-only
config FUSE_FS
tristate "FUSE (Filesystem in Userspace) support"
select FS_POSIX_ACL
help
With FUSE it is possible to implement a fully functional filesystem
in a userspace program.
There's also a companion library: libfuse2. This library is available
from the FUSE homepage:
<https://github.com/libfuse/>
although chances are your distribution already has that library
installed if you've installed the "fuse" package itself.
See <file:Documentation/filesystems/fuse.rst> for more information.
See <file:Documentation/Changes> for needed library/utility version.
If you want to develop a userspace FS, or if you want to use
a filesystem based on FUSE, answer Y or M.
config CUSE
tristate "Character device in Userspace support"
depends on FUSE_FS
help
This FUSE extension allows character devices to be
implemented in userspace.
If you want to develop or use a userspace character device
based on CUSE, answer Y or M.
config VIRTIO_FS
tristate "Virtio Filesystem"
depends on FUSE_FS
select VIRTIO
help
The Virtio Filesystem allows guests to mount file systems from the
host.
If you want to share files between guests or with the host, answer Y
or M.
config FUSE_DAX
bool "Virtio Filesystem Direct Host Memory Access support"
default y
select INTERVAL_TREE
depends on VIRTIO_FS
depends on FS_DAX
depends on DAX
help
This allows bypassing guest page cache and allows mapping host page
cache directly in guest address space.
If you want to allow mounting a Virtio Filesystem with the "dax"
option, answer Y.
config FUSE_PASSTHROUGH
bool "FUSE passthrough operations support"
default y
depends on FUSE_FS
select FS_STACK
help
This allows bypassing FUSE server by mapping specific FUSE operations
to be performed directly on a backing file.
If you want to allow passthrough operations, answer Y.