Blame view
include/linux/nbd.h
2.63 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
/* * 1999 Copyright (C) Pavel Machek, pavel@ucw.cz. This code is GPL. * 1999/11/04 Copyright (C) 1999 VMware, Inc. (Regis "HPReg" Duchesne) * Made nbd_end_request() use the io_request_lock * 2001 Copyright (C) Steven Whitehouse * New nbd_end_request() for compatibility with new linux block * layer code. * 2003/06/24 Louis D. Langholtz <ldl@aros.net> * Removed unneeded blksize_bits field from nbd_device struct. * Cleanup PARANOIA usage & code. * 2004/02/19 Paul Clements * Removed PARANOIA, plus various cleanup and comments */ #ifndef LINUX_NBD_H #define LINUX_NBD_H |
c751c1dbb [PATCH] include l... |
17 |
#include <linux/types.h> |
1da177e4c Linux-2.6.12-rc2 |
18 19 20 21 22 23 24 25 26 |
#define NBD_SET_SOCK _IO( 0xab, 0 ) #define NBD_SET_BLKSIZE _IO( 0xab, 1 ) #define NBD_SET_SIZE _IO( 0xab, 2 ) #define NBD_DO_IT _IO( 0xab, 3 ) #define NBD_CLEAR_SOCK _IO( 0xab, 4 ) #define NBD_CLEAR_QUE _IO( 0xab, 5 ) #define NBD_PRINT_DEBUG _IO( 0xab, 6 ) #define NBD_SET_SIZE_BLOCKS _IO( 0xab, 7 ) #define NBD_DISCONNECT _IO( 0xab, 8 ) |
7fdfd4065 NBD: allow hung n... |
27 |
#define NBD_SET_TIMEOUT _IO( 0xab, 9 ) |
1da177e4c Linux-2.6.12-rc2 |
28 29 30 31 32 33 34 35 |
enum { NBD_CMD_READ = 0, NBD_CMD_WRITE = 1, NBD_CMD_DISC = 2 }; #define nbd_cmd(req) ((req)->cmd[0]) |
1da177e4c Linux-2.6.12-rc2 |
36 37 38 |
/* userspace doesn't need the nbd_device structure */ #ifdef __KERNEL__ |
4b2f0260c [PATCH] nbd: fix ... |
39 |
#include <linux/wait.h> |
82d4dc5ad [PATCH] sem2mutex... |
40 |
#include <linux/mutex.h> |
4b2f0260c [PATCH] nbd: fix ... |
41 |
|
1da177e4c Linux-2.6.12-rc2 |
42 43 44 |
/* values for flags field */ #define NBD_READ_ONLY 0x0001 #define NBD_WRITE_NOCHK 0x0002 |
4b2f0260c [PATCH] nbd: fix ... |
45 |
struct request; |
1da177e4c Linux-2.6.12-rc2 |
46 47 48 49 50 51 |
struct nbd_device { int flags; int harderror; /* Code of hard error */ struct socket * sock; struct file * file; /* If == NULL, device is not ready, yet */ int magic; |
4b2f0260c [PATCH] nbd: fix ... |
52 |
|
1da177e4c Linux-2.6.12-rc2 |
53 |
spinlock_t queue_lock; |
48cf6061b NBD: allow nbd to... |
54 |
struct list_head queue_head; /* Requests waiting result */ |
4b2f0260c [PATCH] nbd: fix ... |
55 56 |
struct request *active_req; wait_queue_head_t active_wq; |
48cf6061b NBD: allow nbd to... |
57 58 |
struct list_head waiting_queue; /* Requests to be sent */ wait_queue_head_t waiting_wq; |
4b2f0260c [PATCH] nbd: fix ... |
59 |
|
82d4dc5ad [PATCH] sem2mutex... |
60 |
struct mutex tx_lock; |
1da177e4c Linux-2.6.12-rc2 |
61 62 63 |
struct gendisk *disk; int blksize; u64 bytesize; |
6b39bb654 [PATCH] nbd: show... |
64 |
pid_t pid; /* pid of nbd-client, if attached */ |
7fdfd4065 NBD: allow hung n... |
65 |
int xmit_timeout; |
1da177e4c Linux-2.6.12-rc2 |
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 |
}; #endif /* These are sent over the network in the request/reply magic fields */ #define NBD_REQUEST_MAGIC 0x25609513 #define NBD_REPLY_MAGIC 0x67446698 /* Do *not* use magics: 0x12560953 0x96744668. */ /* * This is the packet used for communication between client and * server. All data are in network byte order. */ struct nbd_request { |
4ad3bcf31 [PATCH] nbd: endi... |
81 82 |
__be32 magic; __be32 type; /* == READ || == WRITE */ |
1da177e4c Linux-2.6.12-rc2 |
83 |
char handle[8]; |
4ad3bcf31 [PATCH] nbd: endi... |
84 85 |
__be64 from; __be32 len; |
09cd2b99c header: fix broke... |
86 |
} __attribute__((packed)); |
1da177e4c Linux-2.6.12-rc2 |
87 88 89 90 91 92 |
/* * This is the reply packet that nbd-server sends back to the client after * it has completed an I/O request (or an error occurs). */ struct nbd_reply { |
4ad3bcf31 [PATCH] nbd: endi... |
93 94 |
__be32 magic; __be32 error; /* 0 = ok, else error */ |
1da177e4c Linux-2.6.12-rc2 |
95 96 97 |
char handle[8]; /* handle you got from request */ }; #endif |