gnbd.h

openGFS , a kind of file system.

/*
 *
 *    Copyright 1999 Regents of the University of Minnesota
 *    Portions Copyright 1999-2001 Sistina Software, Inc.
 *    Portions Copyright 2001 The OpenGFS Project
 *
 *    This is free software released under the GNU General Public License.
 *    There is no warranty for this software.  See the file COPYING for
 *    details.
 *
 *    See the file AUTHORS for a list of contributors.
 *
 */
#ifndef _GNBD_GNBD_H
#define _GNBD_GNBD_H

#define GNBD_ACTION         _IO( 0xeb, 5)	/* this will replace 1-3 */
#define GNBD_DEBUG_ON       _IO( 0xeb, 6)
#define GNBD_DEBUG_OFF      _IO( 0xeb, 7)
#define GNBD_BLKSSZESET     _IO( 0xeb, 9)
#define GNBD_DEVICE         _IO( 0xeb, 10)

#define GNBD_DEV_REMOVE 0
#define GNBD_DEV_CREATE 1

/* actions: SetIP&port, Connect, Disconnect, ForceClose
 * SetIP&Port:
 *   Real basic, just change the stored ip and port for the device.
 * Connect:
 *   make a call to trans_start_up if not already up.
 * Disconnect:
 *   ??
 *   Must close socket connection, but not return errors when access. Just
 *   block. (or something, need to think about this.)
 * ForceClose:
 *   Shutdown socket, return errors to any pending requests. If we can,
 *   force usrland clients to close the device.
 * others?
 */
#define GNBD_ACT_Connect    0
#define GNBD_ACT_Disconnect 1
#define GNBD_ACT_ForceClose 2
#define GNBD_ACT_SetIPPort  3
typedef struct gnbd_action_s {
	uint16_t action;
	uint16_t device;
	uint32_t ip;
	uint16_t port;
} gnbd_action_t;

typedef struct gnbd_device_s {
	int action;
	char *name;
	int length;
	int minor_nr;
} gnbd_device_t;

#endif /* _GNBD_GNBD_H */