/*
   * 1999 Copyright (C) Pavel Machek, pavel@ucw.cz. This code is GPL.
   * 1999/11/04 Copyright (C) 1999 VMware, Inc. (Regis "HPReg" Duchesne)
   *            Made nbd_end_request() use the io_request_lock
   * 2001 Copyright (C) Steven Whitehouse
   *            New nbd_end_request() for compatibility with new linux block
   *            layer code.
   * 2003/06/24 Louis D. Langholtz <ldl@aros.net>
   *            Removed unneeded blksize_bits field from nbd_device struct.
   *            Cleanup PARANOIA usage & code.
   * 2004/02/19 Paul Clements
   *            Removed PARANOIA, plus various cleanup and comments
   */
  #ifndef LINUX_NBD_H
  #define LINUX_NBD_H
  
  
  #include <linux/wait.h>
  #include <linux/mutex.h>
  #include <uapi/linux/nbd.h>
  
  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 waiting result */
  	struct request *active_req;
  	wait_queue_head_t active_wq;
  	struct list_head waiting_queue;	/* Requests to be sent */
  	wait_queue_head_t waiting_wq;
  
  	struct mutex tx_lock;
  	struct gendisk *disk;
  	int blksize;
  	u64 bytesize;
  	pid_t pid; /* pid of nbd-client, if attached */
  	int xmit_timeout;
  	int disconnect; /* a disconnect has been requested by user */
  };
  
  #endif