iscsi_client.h

一个iSCSI协议实现源代码

/* 
 *  $Id: iscsi_client.h,v 1.5 2001/04/21 04:07:01 mbrown Exp $
 *
 *  iscsi_client.h - exports definitions in iscsi_client.c
 *  Copyright (C) 2001 Michael F. Brown ([e-mail])
 * 
 *  Changes :
 *
 *  $Log: iscsi_client.h,v $
 *  Revision 1.5  2001/04/21 04:07:01  mbrown
 *  more bug fixing, mount readonly works, use the new DISK file, it
 *  contains a valid ext2 partition
 *
 *  Revision 1.4  2001/04/11 20:09:35  mbrown
 *  IT WORKS!!!!!!  previous bug was a missing proc_name entry
 *
 *  Revision 1.3  2001/04/03 09:44:58  mbrown
 *  iscsi.o and iscsi_client.o now successfully compile.
 *
 *  Revision 1.2  2001/03/12 10:49:31  mbrown
 *  iscsi_client is now basically fully implemented minus proper
 *  /proc communication and compilation fixes.  This is going
 *  to be put aside for now.
 *
 *  Revision 1.1  2001/03/04 10:24:43  mbrown
 *  initial revision.  Doesn't compile but source here might be
 *  useful for Mike and Josh.
 *
 *
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the
 *  Free Software Foundation; either version 2, or (at your option) any
 *  later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 */

#ifndef _ISCSI_CLIENT_H
#define _ISCSI_CLIENT_H

#if !defined(LINUX_VERSION_CODE)
#include <linux/version.h>
#endif
#ifndef LinuxVersionCode
#define LinuxVersionCode(v, p, s) (((v)<<16)+((p)<<8)+(s))
#endif

#include <linux/types.h>
#include <linux/kdev_t.h>

#include "scsi.h"
#include "hosts.h"

#define ISCSI_CLIENT_SCSI_ID  7

/*#define ISCSI_CLIENT_SG_TABLE_SIZE  SG_ALL*/
#define ISCSI_CLIENT_SG_TABLE_SIZE  SG_NONE

int iscsi_client_proc_info(char *, char **, off_t, int, int, int);
const char *iscsi_client_info(struct Scsi_Host *SChost);
int iscsi_client_detect(Scsi_Host_Template *);
int iscsi_client_command(Scsi_Cmnd * SCpnt);
int iscsi_client_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *));
int iscsi_client_abort(Scsi_Cmnd * SCpnt);
int iscsi_client_reset(Scsi_Cmnd * SCpnt, unsigned int flags);
int iscsi_client_bios_param(Disk * disk, kdev_t dev, int *ip);


        /* Using 1500 byte ethernet packets, minus 20 byte IP Header, 
	 * minus 20 byte TCP Header, minus 48-byte iSCSI Header leaves us with
	 * 1412 bytes, we can only fit 2 * 512 byte blocks :(
         * We should really check the Path-MTU of the target we're
         * talking to.  It's expected that this value will be variable
         * for each instantiation of the driver
	 */




        /* Right now we'll limit cmd_per_lun to 1 for proof of concept.  At a later
         * date this should get set to the the maximum number of connections
         * in a particular session a target is willing to support.
         */


#define ISCSI_CLIENT {                                   \
        proc_info:  iscsi_client_proc_info,              \
        proc_name:  "iscsi_client",                      \
        name:  "iSCSI Client Adapter",                   \
        detect:  iscsi_client_detect,                    \
        info:  iscsi_client_info,                        \
        command:  iscsi_client_command,                  \
        queuecommand:  iscsi_client_queuecommand,        \
        abort:  iscsi_client_abort,                      \
        reset:  iscsi_client_reset,                      \
        bios_param:  iscsi_client_bios_param,            \
        can_queue:  1,                                   \
        this_id:  ISCSI_CLIENT_SCSI_ID,                  \
        sg_tablesize:  ISCSI_CLIENT_SG_TABLE_SIZE,       \
        cmd_per_lun:  1,                                 \
        unchecked_isa_dma:  0,                           \
        use_clustering:  ENABLE_CLUSTERING               \
}

#endif