linux-stable.git/samples/rust/rust_misc_device.rs, branch v6.14 Linux kernel stable tree samples: rust_misc_device: Provide an example C program to exercise functionality 2024-12-16T15:12:56+00:00 Lee Jones lee@kernel.org 2024-12-13T13:47:10+00:00 8d9b095b8f898bddc6c59a3eb9f50c1aa194c57a Here is the expected output (manually spliced together): USERSPACE: Opening /dev/rust-misc-device for reading and writing KERNEL: rust_misc_device: Opening Rust Misc Device Sample USERSPACE: Calling Hello KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample KERNEL: rust_misc_device: -> Hello from the Rust Misc Device USERSPACE: Fetching initial value KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample KERNEL: rust_misc_device: -> Copying data to userspace (value: 0) USERSPACE: Submitting new value (1) KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample KERNEL: rust_misc_device: -> Copying data from userspace (value: 1) USERSPACE: Fetching new value KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample KERNEL: rust_misc_device: -> Copying data to userspace (value: 1) USERSPACE: Attempting to call in to an non-existent IOCTL KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample KERNEL: rust_misc_device: -> IOCTL not recognised: 20992 USERSPACE: ioctl: Succeeded to fail - this was expected: Inappropriate ioctl for device USERSPACE: Closing /dev/rust-misc-device KERNEL: rust_misc_device: Exiting the Rust Misc Device Sample USERSPACE: Success Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20241213134715.601415-6-lee@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Here is the expected output (manually spliced together):

USERSPACE: Opening /dev/rust-misc-device for reading and writing
KERNEL: rust_misc_device: Opening Rust Misc Device Sample
USERSPACE: Calling Hello
KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample
KERNEL: rust_misc_device: -> Hello from the Rust Misc Device
USERSPACE: Fetching initial value
KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample
KERNEL: rust_misc_device: -> Copying data to userspace (value: 0)
USERSPACE: Submitting new value (1)
KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample
KERNEL: rust_misc_device: -> Copying data from userspace (value: 1)
USERSPACE: Fetching new value
KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample
KERNEL: rust_misc_device: -> Copying data to userspace (value: 1)
USERSPACE: Attempting to call in to an non-existent IOCTL
KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample
KERNEL: rust_misc_device: -> IOCTL not recognised: 20992
USERSPACE: ioctl: Succeeded to fail - this was expected: Inappropriate ioctl for device
USERSPACE: Closing /dev/rust-misc-device
KERNEL: rust_misc_device: Exiting the Rust Misc Device Sample
USERSPACE: Success

Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20241213134715.601415-6-lee@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
samples: rust_misc_device: Demonstrate additional get/set value functionality 2024-12-16T15:12:53+00:00 Lee Jones lee@kernel.org 2024-12-13T13:47:08+00:00 42523ceba5f6735df4d02c6982d1733a1465afbd Expand the complexity of the sample driver by providing the ability to get and set an integer. The value is protected by a mutex. Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20241213134715.601415-4-lee@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Expand the complexity of the sample driver by providing the ability to
get and set an integer.  The value is protected by a mutex.

Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20241213134715.601415-4-lee@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
samples: rust: Provide example using the new Rust MiscDevice abstraction 2024-12-16T15:12:45+00:00 Lee Jones lee@kernel.org 2024-12-13T13:47:07+00:00 fdb1ac6c302689b286eca9bb7247111bffc7db17 This sample driver demonstrates the following basic operations: * Register a Misc Device * Create /dev/rust-misc-device * Provide open call-back for the aforementioned character device * Operate on the character device via a simple ioctl() * Provide close call-back for the character device Signed-off-by: Lee Jones <lee@kernel.org> Reviewed-by: Danilo Krummrich <dakr@kernel.org> Link: https://lore.kernel.org/r/20241213134715.601415-3-lee@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
This sample driver demonstrates the following basic operations:

* Register a Misc Device
* Create /dev/rust-misc-device
* Provide open call-back for the aforementioned character device
* Operate on the character device via a simple ioctl()
* Provide close call-back for the character device

Signed-off-by: Lee Jones <lee@kernel.org>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20241213134715.601415-3-lee@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>