/* userspace doesn't need the nbd_device structure */
#ifdef __KERNEL__
+#include <linux/wait.h>
+#include <linux/mutex.h>
+
/* values for flags field */
#define NBD_READ_ONLY 0x0001
#define NBD_WRITE_NOCHK 0x0002
+struct request;
+
struct nbd_device {
int flags;
int harderror; /* Code of hard error */
struct socket * sock;
struct file * file; /* If == NULL, device is not ready, yet */
int magic;
+
spinlock_t queue_lock;
struct list_head queue_head;/* Requests are added here... */
- struct semaphore tx_lock;
+ struct request *active_req;
+ wait_queue_head_t active_wq;
+
+ struct mutex tx_lock;
struct gendisk *disk;
int blksize;
u64 bytesize;