88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
|
/*******************************************************************************
|
||
|
|
* This file contains the iSCSI Virtual Device and Disk Transport
|
||
|
|
* agnostic related functions.
|
||
|
|
*
|
||
|
|
\u00a9 Copyright 2007-2011 RisingTide Systems LLC.
|
||
|
|
*
|
||
|
|
* Licensed to the Linux Foundation under the General Public License (GPL) version 2.
|
||
|
|
*
|
||
|
|
* Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
#include <scsi/scsi_device.h>
|
||
|
|
#include <target/target_core_base.h>
|
||
|
|
#include <target/target_core_device.h>
|
||
|
|
#include <target/target_core_transport.h>
|
||
|
|
|
||
|
|
#include "iscsi_target_core.h"
|
||
|
|
#include "iscsi_target_device.h"
|
||
|
|
#include "iscsi_target_tpg.h"
|
||
|
|
#include "iscsi_target_util.h"
|
||
|
|
|
||
|
|
int iscsit_get_lun_for_tmr(
|
||
|
|
struct iscsi_cmd *cmd,
|
||
|
|
u64 lun)
|
||
|
|
{
|
||
|
|
u32 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
|
||
|
|
|
||
|
|
return transport_lookup_tmr_lun(&cmd->se_cmd, unpacked_lun);
|
||
|
|
}
|
||
|
|
|
||
|
|
int iscsit_get_lun_for_cmd(
|
||
|
|
struct iscsi_cmd *cmd,
|
||
|
|
unsigned char *cdb,
|
||
|
|
u64 lun)
|
||
|
|
{
|
||
|
|
u32 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
|
||
|
|
|
||
|
|
return transport_lookup_cmd_lun(&cmd->se_cmd, unpacked_lun);
|
||
|
|
}
|
||
|
|
|
||
|
|
void iscsit_determine_maxcmdsn(struct iscsi_session *sess)
|
||
|
|
{
|
||
|
|
struct se_node_acl *se_nacl;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This is a discovery session, the single queue slot was already
|
||
|
|
* assigned in iscsi_login_zero_tsih(). Since only Logout and
|
||
|
|
* Text Opcodes are allowed during discovery we do not have to worry
|
||
|
|
* about the HBA's queue depth here.
|
||
|
|
*/
|
||
|
|
if (sess->sess_ops->SessionType)
|
||
|
|
return;
|
||
|
|
|
||
|
|
se_nacl = sess->se_sess->se_node_acl;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This is a normal session, set the Session's CmdSN window to the
|
||
|
|
* struct se_node_acl->queue_depth. The value in struct se_node_acl->queue_depth
|
||
|
|
* has already been validated as a legal value in
|
||
|
|
* core_set_queue_depth_for_node().
|
||
|
|
*/
|
||
|
|
sess->cmdsn_window = se_nacl->queue_depth;
|
||
|
|
sess->max_cmd_sn = (sess->max_cmd_sn + se_nacl->queue_depth) - 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
void iscsit_increment_maxcmdsn(struct iscsi_cmd *cmd, struct iscsi_session *sess)
|
||
|
|
{
|
||
|
|
if (cmd->immediate_cmd || cmd->maxcmdsn_inc)
|
||
|
|
return;
|
||
|
|
|
||
|
|
cmd->maxcmdsn_inc = 1;
|
||
|
|
|
||
|
|
mutex_lock(&sess->cmdsn_mutex);
|
||
|
|
sess->max_cmd_sn += 1;
|
||
|
|
pr_debug("Updated MaxCmdSN to 0x%08x\n", sess->max_cmd_sn);
|
||
|
|
mutex_unlock(&sess->cmdsn_mutex);
|
||
|
|
}
|