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90eeb01a03
This patch adds bsg support to the iscsi class. There is only 1 request, the host vendor one, supported. It is expected that this would be used for things like flash updates. This patch is made over this one http://marc.info/?l=linux-scsi&m=131149780020992&w=2 Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/*
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* iSCSI Transport BSG Interface
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*
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* Copyright (C) 2009 James Smart, Emulex Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef SCSI_BSG_ISCSI_H
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#define SCSI_BSG_ISCSI_H
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/*
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* This file intended to be included by both kernel and user space
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*/
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#include <scsi/scsi.h>
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/*
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* iSCSI Transport SGIO v4 BSG Message Support
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*/
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/* Default BSG request timeout (in seconds) */
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#define ISCSI_DEFAULT_BSG_TIMEOUT (10 * HZ)
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/*
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* Request Message Codes supported by the iSCSI Transport
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*/
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/* define the class masks for the message codes */
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#define ISCSI_BSG_CLS_MASK 0xF0000000 /* find object class */
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#define ISCSI_BSG_HST_MASK 0x80000000 /* iscsi host class */
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/* iscsi host Message Codes */
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#define ISCSI_BSG_HST_VENDOR (ISCSI_BSG_HST_MASK | 0x000000FF)
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/*
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* iSCSI Host Messages
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*/
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/* ISCSI_BSG_HST_VENDOR : */
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/* Request:
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* Note: When specifying vendor_id, be sure to read the Vendor Type and ID
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* formatting requirements specified in scsi_netlink.h
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*/
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struct iscsi_bsg_host_vendor {
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/*
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* Identifies the vendor that the message is formatted for. This
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* should be the recipient of the message.
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*/
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uint64_t vendor_id;
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/* start of vendor command area */
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uint32_t vendor_cmd[0];
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};
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/* Response:
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*/
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struct iscsi_bsg_host_vendor_reply {
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/* start of vendor response area */
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uint32_t vendor_rsp[0];
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};
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/* request (CDB) structure of the sg_io_v4 */
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struct iscsi_bsg_request {
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uint32_t msgcode;
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union {
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struct iscsi_bsg_host_vendor h_vendor;
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} rqst_data;
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} __attribute__((packed));
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/* response (request sense data) structure of the sg_io_v4 */
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struct iscsi_bsg_reply {
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/*
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* The completion result. Result exists in two forms:
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* if negative, it is an -Exxx system errno value. There will
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* be no further reply information supplied.
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* else, it's the 4-byte scsi error result, with driver, host,
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* msg and status fields. The per-msgcode reply structure
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* will contain valid data.
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*/
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uint32_t result;
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/* If there was reply_payload, how much was recevied ? */
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uint32_t reply_payload_rcv_len;
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union {
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struct iscsi_bsg_host_vendor_reply vendor_reply;
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} reply_data;
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};
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#endif /* SCSI_BSG_ISCSI_H */
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