#ifndef LINUX_NBD_H
#define LINUX_NBD_H
+//#include <linux/types.h>
+
#define NBD_SET_SOCK _IO( 0xab, 0 )
#define NBD_SET_BLKSIZE _IO( 0xab, 1 )
#define NBD_SET_SIZE _IO( 0xab, 2 )
#define NBD_PRINT_DEBUG _IO( 0xab, 6 )
#define NBD_SET_SIZE_BLOCKS _IO( 0xab, 7 )
#define NBD_DISCONNECT _IO( 0xab, 8 )
+#define NBD_SET_TIMEOUT _IO( 0xab, 9 )
+#define NBD_SET_FLAGS _IO( 0xab, 10 )
enum {
NBD_CMD_READ = 0,
NBD_CMD_WRITE = 1,
NBD_CMD_DISC = 2,
+ NBD_CMD_FLUSH = 3
};
-#define nbd_cmd(req) ((req)->cmd[0])
-#define MAX_NBD 128
-
-/* userspace doesn't need the nbd_device structure */
-#ifdef __KERNEL__
+#define NBD_CMD_MASK_COMMAND 0x0000ffff
+#define NBD_CMD_FLAG_FUA (1<<16)
/* values for flags field */
-#define NBD_READ_ONLY 0x0001
-#define NBD_WRITE_NOCHK 0x0002
-
-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;
- spinlock_t queue_lock;
- struct list_head queue_head;/* Requests are added here... */
- struct semaphore tx_lock;
- struct gendisk *disk;
- int blksize;
- u64 bytesize;
-};
-
-#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 {
- u32 magic;
- u32 type; /* == READ || == WRITE */
- char handle[8];
- u64 from;
- u32 len;
-}
-#ifdef __GNUC__
- __attribute__ ((packed))
-#endif
-;
-
-/*
- * 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 {
- u32 magic;
- u32 error; /* 0 = ok, else error */
- char handle[8]; /* handle you got from request */
-};
-#endif
-/*
- * 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
-
-#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 )
-
-enum {
- NBD_CMD_READ = 0,
- NBD_CMD_WRITE = 1,
- NBD_CMD_DISC = 2
-};
+#define NBD_FLAG_HAS_FLAGS (1 << 0) /* Flags are there */
+#define NBD_FLAG_READ_ONLY (1 << 1) /* Device is read-only */
+#define NBD_FLAG_SEND_FLUSH (1 << 2) /* Send FLUSH */
+#define NBD_FLAG_SEND_FUA (1 << 3) /* Send FUA (Force Unit Access) */
+#define NBD_FLAG_ROTATIONAL (1 << 4) /* Use elevator algorithm - rotational media */
#define nbd_cmd(req) ((req)->cmd[0])
-#define MAX_NBD 128
/* userspace doesn't need the nbd_device structure */
-#ifdef __KERNEL__
-
-/* values for flags field */
-#define NBD_READ_ONLY 0x0001
-#define NBD_WRITE_NOCHK 0x0002
-
-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;
- spinlock_t queue_lock;
- struct list_head queue_head;/* Requests are added here... */
- struct semaphore tx_lock;
- struct gendisk *disk;
- int blksize;
- u64 bytesize;
-};
-
-#endif
/* These are sent over the network in the request/reply magic fields */
* server. All data are in network byte order.
*/
struct nbd_request {
- u32 magic;
- u32 type; /* == READ || == WRITE */
+ __be32 magic;
+ __be32 type; /* == READ || == WRITE */
char handle[8];
- u64 from;
- u32 len;
-}
-#ifdef __GNUC__
- __attribute__ ((packed))
-#endif
-;
+ __be64 from;
+ __be32 len;
+} __attribute__ ((packed));
/*
* 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 {
- u32 magic;
- u32 error; /* 0 = ok, else error */
+ __be32 magic;
+ __be32 error; /* 0 = ok, else error */
char handle[8]; /* handle you got from request */
};
#endif
projects / nbd.git / blobdiff