rust: add basic `Task`
It is an abstraction for C's `struct task_struct`. It implements
`AlwaysRefCounted`, so the refcount of the wrapped object is managed
safely on the Rust side.
Cc: Ingo Molnar <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Reviewed-by: Martin Rodriguez Reboredo <[email protected]>
Signed-off-by: Wedson Almeida Filho <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
diff --git a/rust/helpers.c b/rust/helpers.c
index 446e3cf..6e5b2c9 100644
--- a/rust/helpers.c
+++ b/rust/helpers.c
@@ -24,6 +24,7 @@
#include <linux/refcount.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
+#include <linux/sched/signal.h>
__noreturn void rust_helper_BUG(void)
{
@@ -60,6 +61,12 @@ void rust_helper_spin_unlock(spinlock_t *lock)
}
EXPORT_SYMBOL_GPL(rust_helper_spin_unlock);
+int rust_helper_signal_pending(struct task_struct *t)
+{
+ return signal_pending(t);
+}
+EXPORT_SYMBOL_GPL(rust_helper_signal_pending);
+
refcount_t rust_helper_REFCOUNT_INIT(int n)
{
return (refcount_t)REFCOUNT_INIT(n);
@@ -96,6 +103,18 @@ long rust_helper_PTR_ERR(__force const void *ptr)
}
EXPORT_SYMBOL_GPL(rust_helper_PTR_ERR);
+void rust_helper_get_task_struct(struct task_struct *t)
+{
+ get_task_struct(t);
+}
+EXPORT_SYMBOL_GPL(rust_helper_get_task_struct);
+
+void rust_helper_put_task_struct(struct task_struct *t)
+{
+ put_task_struct(t);
+}
+EXPORT_SYMBOL_GPL(rust_helper_put_task_struct);
+
/*
* We use `bindgen`'s `--size_t-is-usize` option to bind the C `size_t` type
* as the Rust `usize` type, so we can use it in contexts where Rust
