linux/samples/rust/rust_misc_device.rs, branch v6.14

samples: rust_misc_device: Provide an example C program to exercise functionality

2024-12-16T15:12:56Z

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 Link: https://lore.kernel.org/r/20241213134715.601415-6-lee@kernel.org Signed-off-by: Greg Kroah-Hartman

samples: rust_misc_device: Demonstrate additional get/set value functionality

2024-12-16T15:12:53Z

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 Link: https://lore.kernel.org/r/20241213134715.601415-4-lee@kernel.org Signed-off-by: Greg Kroah-Hartman

samples: rust: Provide example using the new Rust MiscDevice abstraction

2024-12-16T15:12:45Z

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 Reviewed-by: Danilo Krummrich Link: https://lore.kernel.org/r/20241213134715.601415-3-lee@kernel.org Signed-off-by: Greg Kroah-Hartman