1 files changed, 29 insertions, 0 deletions
diff --git a/kernel/queue.h b/kernel/queue.h
new file mode 100644
index 0000000..f349637
--- /dev/null
+++ b/kernel/queue.h
@@ -0,0 +1,29 @@
+#ifndef LINUX_DNBD_QUEUE_H
+#define LINUX_DNBD_QUEUE_H	1
+
+#include <linux/spinlock.h>
+#include <asm/semaphore.h>
+#include <linux/list.h>
+#include <linux/wait.h>
+
+/* queue structure used for rx_queue and tx_queue */
+struct dnbd_queue {
+	spinlock_t lock;
+	struct semaphore sema;
+	struct list_head head;
+	wait_queue_head_t waiters;
+};
+
+typedef struct dnbd_queue dnbd_queue_t;
+
+/* functions */
+void dnbd_enq_request(dnbd_queue_t * q, struct request *req, int wakeup);
+struct request *dnbd_deq_request(dnbd_queue_t * q);
+struct request *dnbd_deq_request_handle(dnbd_queue_t * q, uint64_t pos);
+struct request *dnbd_try_deq_request(dnbd_queue_t * q);
+void dnbd_mark_old_requests(dnbd_queue_t * q);
+int dnbd_requeue_requests(dnbd_queue_t * to, dnbd_queue_t * from, unsigned long timeout);
+void dnbd_error_old_requests(dnbd_queue_t * q);
+
+
+#endif				/* LINUX_QUEUE_H */