rust: thread: Add Thread support

fbq · fbq · commit fe0c6341b7bb · 2021-04-29T23:46:18.000+08:00
Signed-off-by: Boqun Feng &lt;boqun.feng@gmail.com&gt;
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
@@ -304,6 +304,10 @@ jobs:
           grep '] rust_sync: Rust synchronisation primitives sample (init)$' qemu-stdout.log
           grep '] rust_sync: Rust synchronisation primitives sample (exit)$' qemu-stdout.log
 
+      - run: |
+          grep '] rust_thread: Rust thread APIs sample (init)$' qemu-stdout.log
+          grep '] rust_thread: Rust thread APIs sample (exit)$' qemu-stdout.log
+
       - run: |
           grep '] rust_chrdev: Rust character device sample (init)$' qemu-stdout.log
           grep '] rust_chrdev: Rust character device sample (exit)$' qemu-stdout.log
diff --git a/.github/workflows/kernel-arm-debug.config b/.github/workflows/kernel-arm-debug.config
@@ -1660,6 +1660,7 @@ CONFIG_SAMPLE_RUST_MINIMAL=m
 CONFIG_SAMPLE_RUST_PRINT=m
 CONFIG_SAMPLE_RUST_MODULE_PARAMETERS=m
 CONFIG_SAMPLE_RUST_SYNC=m
+CONFIG_SAMPLE_RUST_THREAD=m
 CONFIG_SAMPLE_RUST_CHRDEV=m
 CONFIG_SAMPLE_RUST_MISCDEV=m
 CONFIG_SAMPLE_RUST_STACK_PROBING=m
diff --git a/.github/workflows/kernel-arm-release.config b/.github/workflows/kernel-arm-release.config
@@ -1584,6 +1584,7 @@ CONFIG_SAMPLE_RUST_MINIMAL=m
 CONFIG_SAMPLE_RUST_PRINT=m
 CONFIG_SAMPLE_RUST_MODULE_PARAMETERS=m
 CONFIG_SAMPLE_RUST_SYNC=m
+CONFIG_SAMPLE_RUST_THREAD=m
 CONFIG_SAMPLE_RUST_CHRDEV=m
 CONFIG_SAMPLE_RUST_MISCDEV=m
 CONFIG_SAMPLE_RUST_STACK_PROBING=m
diff --git a/.github/workflows/kernel-arm64-debug.config b/.github/workflows/kernel-arm64-debug.config
@@ -1426,6 +1426,7 @@ CONFIG_SAMPLE_RUST_MINIMAL=m
 CONFIG_SAMPLE_RUST_PRINT=m
 CONFIG_SAMPLE_RUST_MODULE_PARAMETERS=m
 CONFIG_SAMPLE_RUST_SYNC=m
+CONFIG_SAMPLE_RUST_THREAD=m
 CONFIG_SAMPLE_RUST_CHRDEV=m
 CONFIG_SAMPLE_RUST_MISCDEV=m
 CONFIG_SAMPLE_RUST_STACK_PROBING=m
diff --git a/.github/workflows/kernel-arm64-release.config b/.github/workflows/kernel-arm64-release.config
@@ -1344,6 +1344,7 @@ CONFIG_SAMPLE_RUST_MINIMAL=m
 CONFIG_SAMPLE_RUST_PRINT=m
 CONFIG_SAMPLE_RUST_MODULE_PARAMETERS=m
 CONFIG_SAMPLE_RUST_SYNC=m
+CONFIG_SAMPLE_RUST_THREAD=m
 CONFIG_SAMPLE_RUST_CHRDEV=m
 CONFIG_SAMPLE_RUST_MISCDEV=m
 CONFIG_SAMPLE_RUST_STACK_PROBING=m
diff --git a/.github/workflows/kernel-ppc64le-debug.config b/.github/workflows/kernel-ppc64le-debug.config
@@ -1486,6 +1486,7 @@ CONFIG_SAMPLE_RUST_MINIMAL=m
 CONFIG_SAMPLE_RUST_PRINT=m
 CONFIG_SAMPLE_RUST_MODULE_PARAMETERS=m
 CONFIG_SAMPLE_RUST_SYNC=m
+CONFIG_SAMPLE_RUST_THREAD=m
 CONFIG_SAMPLE_RUST_CHRDEV=m
 CONFIG_SAMPLE_RUST_MISCDEV=m
 CONFIG_SAMPLE_RUST_STACK_PROBING=m
diff --git a/.github/workflows/kernel-ppc64le-release.config b/.github/workflows/kernel-ppc64le-release.config
@@ -1448,6 +1448,7 @@ CONFIG_SAMPLE_RUST_MINIMAL=m
 CONFIG_SAMPLE_RUST_PRINT=m
 CONFIG_SAMPLE_RUST_MODULE_PARAMETERS=m
 CONFIG_SAMPLE_RUST_SYNC=m
+CONFIG_SAMPLE_RUST_THREAD=m
 CONFIG_SAMPLE_RUST_CHRDEV=m
 CONFIG_SAMPLE_RUST_MISCDEV=m
 CONFIG_SAMPLE_RUST_STACK_PROBING=m
diff --git a/.github/workflows/kernel-riscv64-debug.config b/.github/workflows/kernel-riscv64-debug.config
@@ -1348,6 +1348,7 @@ CONFIG_SAMPLE_RUST_MINIMAL=m
 CONFIG_SAMPLE_RUST_PRINT=m
 CONFIG_SAMPLE_RUST_MODULE_PARAMETERS=m
 CONFIG_SAMPLE_RUST_SYNC=m
+CONFIG_SAMPLE_RUST_THREAD=m
 CONFIG_SAMPLE_RUST_CHRDEV=m
 CONFIG_SAMPLE_RUST_MISCDEV=m
 CONFIG_SAMPLE_RUST_STACK_PROBING=m
diff --git a/.github/workflows/kernel-riscv64-release.config b/.github/workflows/kernel-riscv64-release.config
@@ -1313,6 +1313,7 @@ CONFIG_SAMPLE_RUST_MINIMAL=m
 CONFIG_SAMPLE_RUST_PRINT=m
 CONFIG_SAMPLE_RUST_MODULE_PARAMETERS=m
 CONFIG_SAMPLE_RUST_SYNC=m
+CONFIG_SAMPLE_RUST_THREAD=m
 CONFIG_SAMPLE_RUST_CHRDEV=m
 CONFIG_SAMPLE_RUST_MISCDEV=m
 CONFIG_SAMPLE_RUST_STACK_PROBING=m
diff --git a/.github/workflows/kernel-x86_64-debug.config b/.github/workflows/kernel-x86_64-debug.config
@@ -1438,6 +1438,7 @@ CONFIG_SAMPLE_RUST_MINIMAL=m
 CONFIG_SAMPLE_RUST_PRINT=m
 CONFIG_SAMPLE_RUST_MODULE_PARAMETERS=m
 CONFIG_SAMPLE_RUST_SYNC=m
+CONFIG_SAMPLE_RUST_THREAD=m
 CONFIG_SAMPLE_RUST_CHRDEV=m
 CONFIG_SAMPLE_RUST_MISCDEV=m
 CONFIG_SAMPLE_RUST_STACK_PROBING=m
diff --git a/.github/workflows/kernel-x86_64-release.config b/.github/workflows/kernel-x86_64-release.config
@@ -1386,6 +1386,7 @@ CONFIG_SAMPLE_RUST_MINIMAL=m
 CONFIG_SAMPLE_RUST_PRINT=m
 CONFIG_SAMPLE_RUST_MODULE_PARAMETERS=m
 CONFIG_SAMPLE_RUST_SYNC=m
+CONFIG_SAMPLE_RUST_THREAD=m
 CONFIG_SAMPLE_RUST_CHRDEV=m
 CONFIG_SAMPLE_RUST_MISCDEV=m
 CONFIG_SAMPLE_RUST_STACK_PROBING=m
diff --git a/.github/workflows/qemu-init.sh b/.github/workflows/qemu-init.sh
@@ -12,6 +12,9 @@ busybox  rmmod rust_module_parameters.ko
 busybox insmod rust_sync.ko
 busybox  rmmod rust_sync.ko
 
+busybox insmod rust_thread.ko
+busybox  rmmod rust_thread.ko
+
 busybox insmod rust_chrdev.ko
 busybox  rmmod rust_chrdev.ko
 
diff --git a/.github/workflows/qemu-initramfs.desc b/.github/workflows/qemu-initramfs.desc
@@ -9,6 +9,7 @@ file    /rust_minimal.ko            samples/rust/rust_minimal.ko            0755
 file    /rust_print.ko              samples/rust/rust_print.ko              0755 0 0
 file    /rust_module_parameters.ko  samples/rust/rust_module_parameters.ko  0755 0 0
 file    /rust_sync.ko               samples/rust/rust_sync.ko               0755 0 0
+file    /rust_thread.ko             samples/rust/rust_thread.ko             0755 0 0
 file    /rust_chrdev.ko             samples/rust/rust_chrdev.ko             0755 0 0
 file    /rust_miscdev.ko            samples/rust/rust_miscdev.ko            0755 0 0
 file    /rust_stack_probing.ko      samples/rust/rust_stack_probing.ko      0755 0 0
diff --git a/rust/helpers.c b/rust/helpers.c
@@ -4,6 +4,7 @@
 #include <linux/build_bug.h>
 #include <linux/uaccess.h>
 #include <linux/sched/signal.h>
+#include <linux/sched/task.h>
 #include <linux/gfp.h>
 #include <linux/highmem.h>
 #include <linux/uio.h>
@@ -105,6 +106,18 @@ size_t rust_helper_copy_to_iter(const void *addr, size_t bytes, struct iov_iter
 }
 EXPORT_SYMBOL_GPL(rust_helper_copy_to_iter);
 
+void rust_helper_get_task_struct(struct task_struct *task)
+{
+	(void)get_task_struct(task);
+}
+EXPORT_SYMBOL(rust_helper_get_task_struct);
+
+void rust_helper_put_task_struct(struct task_struct *task)
+{
+	put_task_struct(task);
+}
+EXPORT_SYMBOL(rust_helper_put_task_struct);
+
 #if !defined(CONFIG_ARM)
 // See https://github.com/rust-lang/rust-bindgen/issues/1671
 static_assert(__builtin_types_compatible_p(size_t, uintptr_t),
diff --git a/rust/kernel/bindings_helper.h b/rust/kernel/bindings_helper.h
@@ -1,7 +1,9 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 
 #include <linux/cdev.h>
+#include <linux/err.h>
 #include <linux/fs.h>
+#include <linux/kthread.h>
 #include <linux/module.h>
 #include <linux/random.h>
 #include <linux/slab.h>
diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs
@@ -106,13 +106,13 @@ impl From<AllocError> for Error {
     }
 }
 
-/// Convert a kernel pointer to [`KernelResult`]
+/// Converts a kernel pointer to [`KernelResult`].
 ///
 /// # Pointer value range
 ///
-/// (According to include/linux/err.h)
+/// According to `include/linux/err.h`,
 /// [0, .., `core::usize::MAX - bindings::MAX_ERRNO`) is the range for normal values of pointer,
-/// [`core::unsize::MAX - bindings::MAX_ERRNO`,..,`core::usize::MAX] is the range for error value
+/// [`core::unsize::MAX - bindings::MAX_ERRNO`,..,`core::usize::MAX] is the range for error values
 /// stored in pointer.
 pub fn ptr_to_result<T>(ptr: *mut T) -> KernelResult<*mut T> {
     let value = ptr as usize;
diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs
@@ -55,6 +55,7 @@ pub mod print;
 pub mod random;
 mod static_assert;
 pub mod sync;
+pub mod thread;
 
 #[cfg(CONFIG_SYSCTL)]
 pub mod sysctl;
diff --git a/rust/kernel/thread.rs b/rust/kernel/thread.rs
diff --git a/samples/rust/Kconfig b/samples/rust/Kconfig
diff --git a/samples/rust/Makefile b/samples/rust/Makefile
diff --git a/samples/rust/rust_thread.rs b/samples/rust/rust_thread.rs
