cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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iscsi_target_device.c (1741B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*******************************************************************************
      3 * This file contains the iSCSI Virtual Device and Disk Transport
      4 * agnostic related functions.
      5 *
      6 * (c) Copyright 2007-2013 Datera, Inc.
      7 *
      8 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
      9 *
     10 ******************************************************************************/
     11
     12#include <target/target_core_base.h>
     13#include <target/target_core_fabric.h>
     14
     15#include <target/iscsi/iscsi_target_core.h>
     16#include "iscsi_target_device.h"
     17#include "iscsi_target_tpg.h"
     18#include "iscsi_target_util.h"
     19
     20void iscsit_determine_maxcmdsn(struct iscsit_session *sess)
     21{
     22	struct se_node_acl *se_nacl;
     23
     24	/*
     25	 * This is a discovery session, the single queue slot was already
     26	 * assigned in iscsi_login_zero_tsih().  Since only Logout and
     27	 * Text Opcodes are allowed during discovery we do not have to worry
     28	 * about the HBA's queue depth here.
     29	 */
     30	if (sess->sess_ops->SessionType)
     31		return;
     32
     33	se_nacl = sess->se_sess->se_node_acl;
     34
     35	/*
     36	 * This is a normal session, set the Session's CmdSN window to the
     37	 * struct se_node_acl->queue_depth.  The value in struct se_node_acl->queue_depth
     38	 * has already been validated as a legal value in
     39	 * core_set_queue_depth_for_node().
     40	 */
     41	sess->cmdsn_window = se_nacl->queue_depth;
     42	atomic_add(se_nacl->queue_depth - 1, &sess->max_cmd_sn);
     43}
     44
     45void iscsit_increment_maxcmdsn(struct iscsit_cmd *cmd, struct iscsit_session *sess)
     46{
     47	u32 max_cmd_sn;
     48
     49	if (cmd->immediate_cmd || cmd->maxcmdsn_inc)
     50		return;
     51
     52	cmd->maxcmdsn_inc = 1;
     53
     54	max_cmd_sn = atomic_inc_return(&sess->max_cmd_sn);
     55	pr_debug("Updated MaxCmdSN to 0x%08x\n", max_cmd_sn);
     56}
     57EXPORT_SYMBOL(iscsit_increment_maxcmdsn);