projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| e48354ce NB |
1 | /******************************************************************************* |
| 2 | * This file contains the iSCSI Virtual Device and Disk Transport | |
| 3 | * agnostic related functions. | |
| 4 | * | |
| 4c76251e | 5 | * (c) Copyright 2007-2013 Datera, Inc. |
| e48354ce NB |
6 | * |
| 7 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
| 8 | * | |
| 9 | * This program is free software; you can redistribute it and/or modify | |
| 10 | * it under the terms of the GNU General Public License as published by | |
| 11 | * the Free Software Foundation; either version 2 of the License, or | |
| 12 | * (at your option) any later version. | |
| 13 | * | |
| 14 | * This program is distributed in the hope that it will be useful, | |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 | * GNU General Public License for more details. | |
| 18 | ******************************************************************************/ | |
| 19 | ||
| e48354ce | 20 | #include <target/target_core_base.h> |
| c4795fb2 | 21 | #include <target/target_core_fabric.h> |
| e48354ce | 22 | |
| 67f091f2 | 23 | #include <target/iscsi/iscsi_target_core.h> |
| e48354ce NB |
24 | #include "iscsi_target_device.h" |
| 25 | #include "iscsi_target_tpg.h" | |
| 26 | #include "iscsi_target_util.h" | |
| 27 | ||
| e48354ce NB |
28 | void iscsit_determine_maxcmdsn(struct iscsi_session *sess) |
| 29 | { | |
| 30 | struct se_node_acl *se_nacl; | |
| 31 | ||
| 32 | /* | |
| 33 | * This is a discovery session, the single queue slot was already | |
| 34 | * assigned in iscsi_login_zero_tsih(). Since only Logout and | |
| 35 | * Text Opcodes are allowed during discovery we do not have to worry | |
| 36 | * about the HBA's queue depth here. | |
| 37 | */ | |
| 38 | if (sess->sess_ops->SessionType) | |
| 39 | return; | |
| 40 | ||
| 41 | se_nacl = sess->se_sess->se_node_acl; | |
| 42 | ||
| 43 | /* | |
| 44 | * This is a normal session, set the Session's CmdSN window to the | |
| 45 | * struct se_node_acl->queue_depth. The value in struct se_node_acl->queue_depth | |
| 46 | * has already been validated as a legal value in | |
| 47 | * core_set_queue_depth_for_node(). | |
| 48 | */ | |
| 49 | sess->cmdsn_window = se_nacl->queue_depth; | |
| 7dd03aca | 50 | atomic_add(se_nacl->queue_depth - 1, &sess->max_cmd_sn); |
| e48354ce NB |
51 | } |
| 52 | ||
| 53 | void iscsit_increment_maxcmdsn(struct iscsi_cmd *cmd, struct iscsi_session *sess) | |
| 54 | { | |
| 7dd03aca RD |
55 | u32 max_cmd_sn; |
| 56 | ||
| e48354ce NB |
57 | if (cmd->immediate_cmd || cmd->maxcmdsn_inc) |
| 58 | return; | |
| 59 | ||
| 60 | cmd->maxcmdsn_inc = 1; | |
| 61 | ||
| 7dd03aca RD |
62 | max_cmd_sn = atomic_inc_return(&sess->max_cmd_sn); |
| 63 | pr_debug("Updated MaxCmdSN to 0x%08x\n", max_cmd_sn); | |
| e48354ce | 64 | } |
| 2ec5a8c1 | 65 | EXPORT_SYMBOL(iscsit_increment_maxcmdsn); |