Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 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 | */ |
||
| 12 | |||
| 13 | #ifndef LINUX_NBD_H |
||
| 14 | #define LINUX_NBD_H |
||
| 15 | |||
| 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 ) |
||
| 25 | |||
| 26 | enum { |
||
| 27 | NBD_CMD_READ = 0, |
||
| 28 | NBD_CMD_WRITE = 1, |
||
| 29 | NBD_CMD_DISC = 2 |
||
| 30 | }; |
||
| 31 | |||
| 32 | #define nbd_cmd(req) ((req)->cmd[0]) |
||
| 33 | #define MAX_NBD 128 |
||
| 34 | |||
| 35 | /* Define PARANOIA to include extra sanity checking code in here & driver */ |
||
| 36 | #define PARANOIA |
||
| 37 | |||
| 38 | struct nbd_device { |
||
| 39 | int flags; |
||
| 40 | int harderror; /* Code of hard error */ |
||
| 41 | #define NBD_READ_ONLY 0x0001 |
||
| 42 | #define NBD_WRITE_NOCHK 0x0002 |
||
| 43 | struct socket * sock; |
||
| 44 | struct file * file; /* If == NULL, device is not ready, yet */ |
||
| 45 | #ifdef PARANOIA |
||
| 46 | int magic; /* FIXME: not if debugging is off */ |
||
| 47 | #endif |
||
| 48 | spinlock_t queue_lock; |
||
| 49 | struct list_head queue_head;/* Requests are added here... */ |
||
| 50 | struct semaphore tx_lock; |
||
| 51 | struct gendisk *disk; |
||
| 52 | int blksize; |
||
| 53 | u64 bytesize; |
||
| 54 | }; |
||
| 55 | |||
| 56 | /* This now IS in some kind of include file... */ |
||
| 57 | |||
| 58 | /* These are send over network in request/reply magic field */ |
||
| 59 | |||
| 60 | #define NBD_REQUEST_MAGIC 0x25609513 |
||
| 61 | #define NBD_REPLY_MAGIC 0x67446698 |
||
| 62 | /* Do *not* use magics: 0x12560953 0x96744668. */ |
||
| 63 | |||
| 64 | /* |
||
| 65 | * This is packet used for communication between client and |
||
| 66 | * server. All data are in network byte order. |
||
| 67 | */ |
||
| 68 | struct nbd_request { |
||
| 69 | u32 magic; |
||
| 70 | u32 type; /* == READ || == WRITE */ |
||
| 71 | char handle[8]; |
||
| 72 | u64 from; |
||
| 73 | u32 len; |
||
| 74 | } |
||
| 75 | #ifdef __GNUC__ |
||
| 76 | __attribute__ ((packed)) |
||
| 77 | #endif |
||
| 78 | ; |
||
| 79 | |||
| 80 | struct nbd_reply { |
||
| 81 | u32 magic; |
||
| 82 | u32 error; /* 0 = ok, else error */ |
||
| 83 | char handle[8]; /* handle you got from request */ |
||
| 84 | }; |
||
| 85 | #endif |