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nbd.h
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1 /*
2  * 1999 Copyright (C) Pavel Machek, [email protected]. 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 <[email protected]>
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 
22 struct request;
23 
24 struct 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 
32  struct list_head queue_head; /* Requests waiting result */
35  struct list_head waiting_queue; /* Requests to be sent */
37 
38  struct mutex tx_lock;
39  struct gendisk *disk;
40  int blksize;
42  pid_t pid; /* pid of nbd-client, if attached */
44 };
45 
46 #endif