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 47