mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
7dd03aca9d
Current for-next iscsi target is broken:
commit 109e238174
Author: Roland Dreier <roland@purestorage.com>
Date: Thu Jul 23 14:53:32 2015 -0700
target: Drop iSCSI use of mutex around max_cmd_sn increment
This patch fixes incorrect pr_debug() + atomic_inc_return() usage
within iscsit_increment_maxcmdsn() code.
Also fix funny iscsit_determine_maxcmdsn() usage and update
iscsi_target_do_tx_login_io() code.
Reported-by: Sagi Grimberg <sagig@mellanox.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*******************************************************************************
|
|
* This file contains the iSCSI Virtual Device and Disk Transport
|
|
* agnostic related functions.
|
|
*
|
|
* (c) Copyright 2007-2013 Datera, Inc.
|
|
*
|
|
* 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 <target/target_core_base.h>
|
|
#include <target/target_core_fabric.h>
|
|
|
|
#include <target/iscsi/iscsi_target_core.h>
|
|
#include "iscsi_target_device.h"
|
|
#include "iscsi_target_tpg.h"
|
|
#include "iscsi_target_util.h"
|
|
|
|
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;
|
|
atomic_add(se_nacl->queue_depth - 1, &sess->max_cmd_sn);
|
|
}
|
|
|
|
void iscsit_increment_maxcmdsn(struct iscsi_cmd *cmd, struct iscsi_session *sess)
|
|
{
|
|
u32 max_cmd_sn;
|
|
|
|
if (cmd->immediate_cmd || cmd->maxcmdsn_inc)
|
|
return;
|
|
|
|
cmd->maxcmdsn_inc = 1;
|
|
|
|
max_cmd_sn = atomic_inc_return(&sess->max_cmd_sn);
|
|
pr_debug("Updated MaxCmdSN to 0x%08x\n", max_cmd_sn);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_increment_maxcmdsn);
|