Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
samples: rust: debugfs_scoped: add example for blobs
Extend the rust_debugfs_scoped sample to demonstrate how to export a
large binary object through a ScopedDir.
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Matthew Maurer <mmaurer@google.com>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
+10
-4
+10
-4
samples/rust/rust_debugfs_scoped.rs
+10
-4
samples/rust/rust_debugfs_scoped.rs
···
9
9
use core::sync::atomic::AtomicUsize;
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10
use kernel::debugfs::{Dir, Scope};
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11
use kernel::prelude::*;
12
+
use kernel::sizes::*;
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use kernel::sync::Mutex;
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use kernel::{c_str, new_mutex, str::CString};
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15
···
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GFP_KERNEL,
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67
)?;
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}
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+
let blob = KBox::pin_init(new_mutex!([0x42; SZ_4K]), GFP_KERNEL)?;
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let scope = KBox::pin_init(
72
-
mod_data
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-
.device_dir
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-
.scope(DeviceData { name, nums }, &file_name, |dev_data, dir| {
72
+
mod_data.device_dir.scope(
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+
DeviceData { name, nums, blob },
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+
&file_name,
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+
|dev_data, dir| {
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76
for (idx, val) in dev_data.nums.iter().enumerate() {
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let Ok(name) = CString::try_from_fmt(fmt!("{idx}")) else {
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return;
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};
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dir.read_write_file(&name, val);
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}
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-
}),
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+
dir.read_write_binary_file(c_str!("blob"), &dev_data.blob);
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+
},
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+
),
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GFP_KERNEL,
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86
)?;
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(*mod_data.devices.lock()).push(scope, GFP_KERNEL)?;
···
115
110
struct DeviceData {
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111
name: CString,
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112
nums: KVec<AtomicUsize>,
113
+
blob: Pin<KBox<Mutex<[u8; SZ_4K]>>>,
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114
}
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fn init_control(base_dir: &Dir, dyn_dirs: Dir) -> impl PinInit<Scope<ModuleData>> + '_ {