1 /*******************************************************************************
2 * This file contains the iSCSI Virtual Device and Disk Transport
3 * agnostic related functions.
5 \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
7 * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
9 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 ******************************************************************************/
22 #include <scsi/scsi_device.h>
23 #include <target/target_core_base.h>
24 #include <target/target_core_device.h>
25 #include <target/target_core_transport.h>
27 #include "iscsi_target_core.h"
28 #include "iscsi_target_device.h"
29 #include "iscsi_target_tpg.h"
30 #include "iscsi_target_util.h"
32 int iscsit_get_lun_for_tmr(
33 struct iscsi_cmd *cmd,
36 u32 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
38 return transport_lookup_tmr_lun(&cmd->se_cmd, unpacked_lun);
41 int iscsit_get_lun_for_cmd(
42 struct iscsi_cmd *cmd,
46 u32 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
48 return transport_lookup_cmd_lun(&cmd->se_cmd, unpacked_lun);
51 void iscsit_determine_maxcmdsn(struct iscsi_session *sess)
53 struct se_node_acl *se_nacl;
56 * This is a discovery session, the single queue slot was already
57 * assigned in iscsi_login_zero_tsih(). Since only Logout and
58 * Text Opcodes are allowed during discovery we do not have to worry
59 * about the HBA's queue depth here.
61 if (sess->sess_ops->SessionType)
64 se_nacl = sess->se_sess->se_node_acl;
67 * This is a normal session, set the Session's CmdSN window to the
68 * struct se_node_acl->queue_depth. The value in struct se_node_acl->queue_depth
69 * has already been validated as a legal value in
70 * core_set_queue_depth_for_node().
72 sess->cmdsn_window = se_nacl->queue_depth;
73 sess->max_cmd_sn = (sess->max_cmd_sn + se_nacl->queue_depth) - 1;
76 void iscsit_increment_maxcmdsn(struct iscsi_cmd *cmd, struct iscsi_session *sess)
78 if (cmd->immediate_cmd || cmd->maxcmdsn_inc)
81 cmd->maxcmdsn_inc = 1;
83 mutex_lock(&sess->cmdsn_mutex);
84 sess->max_cmd_sn += 1;
85 pr_debug("Updated MaxCmdSN to 0x%08x\n", sess->max_cmd_sn);
86 mutex_unlock(&sess->cmdsn_mutex);