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/*
* iSCSI Transport BSG Interface
*
* Copyright (C) 2009 James Smart, Emulex Corporation
*
* 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 of the License, 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef SCSI_BSG_ISCSI_H
#define SCSI_BSG_ISCSI_H
/*
* This file intended to be included by both kernel and user space
*/
#include <scsi/scsi.h>
/*
* iSCSI Transport SGIO v4 BSG Message Support
*/
/* Default BSG request timeout (in seconds) */
#define ISCSI_DEFAULT_BSG_TIMEOUT (10 * HZ)
/*
* Request Message Codes supported by the iSCSI Transport
*/
/* define the class masks for the message codes */
#define ISCSI_BSG_CLS_MASK 0xF0000000 /* find object class */
#define ISCSI_BSG_HST_MASK 0x80000000 /* iscsi host class */
/* iscsi host Message Codes */
#define ISCSI_BSG_HST_VENDOR (ISCSI_BSG_HST_MASK | 0x000000FF)
/*
* iSCSI Host Messages
*/
/* ISCSI_BSG_HST_VENDOR : */
/* Request:
* Note: When specifying vendor_id, be sure to read the Vendor Type and ID
* formatting requirements specified in scsi_netlink.h
*/
struct iscsi_bsg_host_vendor {
/*
* Identifies the vendor that the message is formatted for. This
* should be the recipient of the message.
*/
uint64_t vendor_id;
/* start of vendor command area */
uint32_t vendor_cmd[0];
};
/* Response:
*/
struct iscsi_bsg_host_vendor_reply {
/* start of vendor response area */
uint32_t vendor_rsp[0];
};
/* request (CDB) structure of the sg_io_v4 */
struct iscsi_bsg_request {
uint32_t msgcode;
union {
struct iscsi_bsg_host_vendor h_vendor;
} rqst_data;
} __attribute__((packed));
/* response (request sense data) structure of the sg_io_v4 */
struct iscsi_bsg_reply {
/*
* The completion result. Result exists in two forms:
* if negative, it is an -Exxx system errno value. There will
* be no further reply information supplied.
* else, it's the 4-byte scsi error result, with driver, host,
* msg and status fields. The per-msgcode reply structure
* will contain valid data.
*/
uint32_t result;
/* If there was reply_payload, how much was recevied ? */
uint32_t reply_payload_rcv_len;
union {
struct iscsi_bsg_host_vendor_reply vendor_reply;
} reply_data;
};
#endif /* SCSI_BSG_ISCSI_H */