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
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.
16 #define NBD_SET_SOCK _IO( 0xab, 0 )
17 #define NBD_SET_BLKSIZE _IO( 0xab, 1 )
18 #define NBD_SET_SIZE _IO( 0xab, 2 )
19 #define NBD_DO_IT _IO( 0xab, 3 )
20 #define NBD_CLEAR_SOCK _IO( 0xab, 4 )
21 #define NBD_CLEAR_QUE _IO( 0xab, 5 )
22 #define NBD_PRINT_DEBUG _IO( 0xab, 6 )
23 #define NBD_SET_SIZE_BLOCKS _IO( 0xab, 7 )
24 #define NBD_DISCONNECT _IO( 0xab, 8 )
32 #define nbd_cmd(req) ((req)->cmd[0])
35 /* Define PARANOIA to include extra sanity checking code in here & driver */
40 int harderror; /* Code of hard error */
41 #define NBD_READ_ONLY 0x0001
42 #define NBD_WRITE_NOCHK 0x0002
44 struct file * file; /* If == NULL, device is not ready, yet */
46 int magic; /* FIXME: not if debugging is off */
48 spinlock_t queue_lock;
49 struct list_head queue_head;/* Requests are added here... */
50 struct semaphore tx_lock;
56 /* This now IS in some kind of include file... */
58 /* These are send over network in request/reply magic field */
60 #define NBD_REQUEST_MAGIC 0x25609513
61 #define NBD_REPLY_MAGIC 0x67446698
62 /* Do *not* use magics: 0x12560953 0x96744668. */
65 * This is packet used for communication between client and
66 * server. All data are in network byte order.
70 u32 type; /* == READ || == WRITE */
76 __attribute__ ((packed))
82 u32 error; /* 0 = ok, else error */
83 char handle[8]; /* handle you got from request */