Implement device-mapper and bio

core/src/lib.rs

@@ -14,11 +14,15 @@
 #![feature(unboxed_closures)]
 #![feature(unsize)]
 
-mod error;
+pub mod error;
 mod layers;
 mod os;
 mod prelude;
 mod tx;
 mod util;
 
 extern crate alloc;
+
+pub use layers::bio::{BlockId, BlockSet, Buf, BufMut, BufRef, BLOCK_SIZE};
+#[cfg(feature = "linux")]
+pub use os::{Arc, Mutex, Vec};

linux/Makefile

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-KDIR ?=
+KDIR ?= /home/qingsong/workspace/rust-for-linux
 ifndef KDIR
 $(error The kernel source directory (KDIR) is not defined)
 endif

linux/bindings/src/bindings.h

@@ -8,7 +8,9 @@
  * Sorted alphabetically.
  */
 
+#include <linux/bio.h>
 #include <linux/delay.h>
+#include <linux/device-mapper.h>
 #include <linux/kthread.h>
 #include <linux/lockdep_types.h>
 #include <linux/refcount.h>

linux/bindings/src/helpers.c

@@ -21,6 +21,7 @@
  */
 
 #include <linux/atomic.h>
+#include <linux/bio.h>
 #include <linux/refcount.h>
 #include <linux/sched/task.h>
 
@@ -58,3 +59,28 @@ void helper_put_task_struct(struct task_struct *t)
 {
 	put_task_struct(t);
 }
+
+void helper_bio_get(struct bio *bio)
+{
+	bio_get(bio);
+}
+
+void helper_bio_set_dev(struct bio *bio, struct block_device *bdev)
+{
+	bio_set_dev(bio, bdev);
+}
+
+bool helper_bio_has_data(struct bio *bio)
+{
+	return bio_has_data(bio);
+}
+
+struct page *helper_virt_to_page(void *addr)
+{
+	return virt_to_page(addr);
+}
+
+void *helper_page_to_virt(struct page *page)
+{
+	return page_to_virt(page);
+}