[SCSI] iscsi class: add bsg support to iscsi class
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>
This commit is contained in:
Mike Christie
committed by
James Bottomley
James Bottomley
parent
6ac73e8cb0
commit
90eeb01a03
110
include/scsi/scsi_bsg_iscsi.h
Normal file
110
include/scsi/scsi_bsg_iscsi.h
Normal file
@@ -0,0 +1,110 @@
|
||||
/*
|
||||
* 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 */
|
||||
@@ -38,6 +38,7 @@ struct iscsi_conn;
|
||||
struct iscsi_task;
|
||||
struct sockaddr;
|
||||
struct iscsi_iface;
|
||||
struct bsg_job;
|
||||
|
||||
/**
|
||||
* struct iscsi_transport - iSCSI Transport template
|
||||
@@ -141,9 +142,9 @@ struct iscsi_transport {
|
||||
enum iscsi_param_type param_type,
|
||||
int param, char *buf);
|
||||
mode_t (*attr_is_visible)(int param_type, int param);
|
||||
int (*bsg_request)(struct bsg_job *job);
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* transport registration upcalls
|
||||
*/
|
||||
@@ -227,8 +228,12 @@ struct iscsi_cls_session {
|
||||
struct iscsi_cls_host {
|
||||
atomic_t nr_scans;
|
||||
struct mutex mutex;
|
||||
struct request_queue *bsg_q;
|
||||
};
|
||||
|
||||
#define iscsi_job_to_shost(_job) \
|
||||
dev_to_shost(_job->dev)
|
||||
|
||||
extern void iscsi_host_for_each_session(struct Scsi_Host *shost,
|
||||
void (*fn)(struct iscsi_cls_session *));
|
||||
|
||||
|
||||
Reference in New Issue
Block a user