| 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 | |
| 22 | struct request; |
| 23 | |
| 24 | struct nbd_device { |
| 25 | int flags; |
| 26 | int harderror; /* Code of hard error */ |
| 27 | struct socket * sock; /* If == NULL, device is not ready, yet */ |
| 28 | int magic; |
| 29 | |
| 30 | spinlock_t queue_lock; |
| 31 | struct list_head queue_head; /* Requests waiting result */ |
| 32 | struct request *active_req; |
| 33 | wait_queue_head_t active_wq; |
| 34 | struct list_head waiting_queue; /* Requests to be sent */ |
| 35 | wait_queue_head_t waiting_wq; |
| 36 | |
| 37 | struct mutex tx_lock; |
| 38 | struct gendisk *disk; |
| 39 | int blksize; |
| 40 | u64 bytesize; |
| 41 | pid_t pid; /* pid of nbd-client, if attached */ |
| 42 | int xmit_timeout; |
| 43 | int disconnect; /* a disconnect has been requested by user */ |
| 44 | }; |
| 45 | |
| 46 | #endif |