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rust: configfs: use `core::ffi::CStr` method names 

Prepare for `core::ffi::CStr` taking the place of `kernel::str::CStr` by
avoid methods that only exist on the latter.

Also avoid `Deref<Target=BStr> for CStr` as that impl doesn't exist on
`core::ffi::CStr`.

Link: https://github.com/Rust-for-Linux/linux/issues/1075
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Benno Lossin <lossin@kernel.org>
Signed-off-by: Tamir Duberstein <tamird@gmail.com>
Acked-by: Andreas Hindborg <a.hindborg@kernel.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Tamir Duberstein 2025-08-13 11:41:54 -04:00 committed by Miguel Ojeda
parent 7ad635c936
commit a3a7d09ab8
2 changed files with 3 additions and 3 deletions
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4
rust/kernel/configfs.rs
View File

@ -263,7 +263,7 @@ pub fn new(
try_pin_init!(Self {
group <- pin_init::init_zeroed().chain(|v: &mut Opaque<bindings::config_group>| {
let place = v.get();
let name = name.as_bytes_with_nul().as_ptr();
let name = name.to_bytes_with_nul().as_ptr();
// SAFETY: It is safe to initialize a group once it has been zeroed.
unsafe {
bindings::config_group_init_type_name(place, name.cast(), item_type.as_ptr())
@ -613,7 +613,7 @@ impl<const ID: u64, O, Data> Attribute<ID, O, Data>
pub const fn new(name: &'static CStr) -> Self {
Self {
attribute: Opaque::new(bindings::configfs_attribute {
ca_name: name.as_char_ptr(),
ca_name: crate::str::as_char_ptr_in_const_context(name),
ca_owner: core::ptr::null_mut(),
ca_mode: 0o660,
show: Some(Self::show),

2
samples/rust/rust_configfs.rs
View File

@ -94,7 +94,7 @@ impl configfs::AttributeOperations<0> for Configuration {
fn show(container: &Configuration, page: &mut [u8; PAGE_SIZE]) -> Result<usize> {
pr_info!("Show message\n");
let data = container.message;
let data = container.message.to_bytes();
page[0..data.len()].copy_from_slice(data);
Ok(data.len())
}