linux/include/linux/nbd.h
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   1/*
   2 * 1999 Copyright (C) Pavel Machek, pavel@ucw.cz. This code is GPL.
   3 * 1999/11/04 Copyright (C) 1999 VMware, Inc. (Regis "HPReg" Duchesne)
   4 *            Made nbd_end_request() use the io_request_lock
   5 * 2001 Copyright (C) Steven Whitehouse
   6 *            New nbd_end_request() for compatibility with new linux block
   7 *            layer code.
   8 * 2003/06/24 Louis D. Langholtz <ldl@aros.net>
   9 *            Removed unneeded blksize_bits field from nbd_device struct.
  10 *            Cleanup PARANOIA usage & code.
  11 * 2004/02/19 Paul Clements
  12 *            Removed PARANOIA, plus various cleanup and comments
  13 */
  14#ifndef LINUX_NBD_H
  15#define LINUX_NBD_H
  16
  17
  18#include <linux/wait.h>
  19#include <linux/mutex.h>
  20#include <uapi/linux/nbd.h>
  21
  22struct request;
  23
  24struct nbd_device {
  25        int flags;
  26        int harderror;          /* Code of hard error                   */
  27        struct socket * sock;
  28        struct file * file;     /* If == NULL, device is not ready, yet */
  29        int magic;
  30
  31        spinlock_t queue_lock;
  32        struct list_head queue_head;    /* Requests waiting result */
  33        struct request *active_req;
  34        wait_queue_head_t active_wq;
  35        struct list_head waiting_queue; /* Requests to be sent */
  36        wait_queue_head_t waiting_wq;
  37
  38        struct mutex tx_lock;
  39        struct gendisk *disk;
  40        int blksize;
  41        u64 bytesize;
  42        pid_t pid; /* pid of nbd-client, if attached */
  43        int xmit_timeout;
  44};
  45
  46#endif
  47
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