drivers/target/iscsi/iscsi_target_nodeattrib.c

   1 /*******************************************************************************
   2  * This file contains the main functions related to Initiator Node Attributes.
   3  *
   4  * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
   5  *
   6  * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
   7  *
   8  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  ******************************************************************************/
  20
  21 #include <target/target_core_base.h>
  22 #include <target/target_core_transport.h>
  23
  24 #include "iscsi_target_core.h"
  25 #include "iscsi_target_device.h"
  26 #include "iscsi_target_tpg.h"
  27 #include "iscsi_target_util.h"
  28 #include "iscsi_target_nodeattrib.h"
  29
  30 static inline char *iscsit_na_get_initiatorname(
  31         struct iscsi_node_acl *nacl)
  32 {
  33         struct se_node_acl *se_nacl = &nacl->se_node_acl;
  34
  35         return &se_nacl->initiatorname[0];
  36 }
  37
  38 void iscsit_set_default_node_attribues(
  39         struct iscsi_node_acl *acl)
  40 {
  41         struct iscsi_node_attrib *a = &acl->node_attrib;
  42
  43         a->dataout_timeout = NA_DATAOUT_TIMEOUT;
  44         a->dataout_timeout_retries = NA_DATAOUT_TIMEOUT_RETRIES;
  45         a->nopin_timeout = NA_NOPIN_TIMEOUT;
  46         a->nopin_response_timeout = NA_NOPIN_RESPONSE_TIMEOUT;
  47         a->random_datain_pdu_offsets = NA_RANDOM_DATAIN_PDU_OFFSETS;
  48         a->random_datain_seq_offsets = NA_RANDOM_DATAIN_SEQ_OFFSETS;
  49         a->random_r2t_offsets = NA_RANDOM_R2T_OFFSETS;
  50         a->default_erl = NA_DEFAULT_ERL;
  51 }
  52
  53 extern int iscsit_na_dataout_timeout(
  54         struct iscsi_node_acl *acl,
  55         u32 dataout_timeout)
  56 {
  57         struct iscsi_node_attrib *a = &acl->node_attrib;
  58
  59         if (dataout_timeout > NA_DATAOUT_TIMEOUT_MAX) {
  60                 pr_err("Requested DataOut Timeout %u larger than"
  61                         " maximum %u\n", dataout_timeout,
  62                         NA_DATAOUT_TIMEOUT_MAX);
  63                 return -EINVAL;
  64         } else if (dataout_timeout < NA_DATAOUT_TIMEOUT_MIX) {
  65                 pr_err("Requested DataOut Timeout %u smaller than"
  66                         " minimum %u\n", dataout_timeout,
  67                         NA_DATAOUT_TIMEOUT_MIX);
  68                 return -EINVAL;
  69         }
  70
  71         a->dataout_timeout = dataout_timeout;
  72         pr_debug("Set DataOut Timeout to %u for Initiator Node"
  73                 " %s\n", a->dataout_timeout, iscsit_na_get_initiatorname(acl));
  74
  75         return 0;
  76 }
  77
  78 extern int iscsit_na_dataout_timeout_retries(
  79         struct iscsi_node_acl *acl,
  80         u32 dataout_timeout_retries)
  81 {
  82         struct iscsi_node_attrib *a = &acl->node_attrib;
  83
  84         if (dataout_timeout_retries > NA_DATAOUT_TIMEOUT_RETRIES_MAX) {
  85                 pr_err("Requested DataOut Timeout Retries %u larger"
  86                         " than maximum %u", dataout_timeout_retries,
  87                                 NA_DATAOUT_TIMEOUT_RETRIES_MAX);
  88                 return -EINVAL;
  89         } else if (dataout_timeout_retries < NA_DATAOUT_TIMEOUT_RETRIES_MIN) {
  90                 pr_err("Requested DataOut Timeout Retries %u smaller"
  91                         " than minimum %u", dataout_timeout_retries,
  92                                 NA_DATAOUT_TIMEOUT_RETRIES_MIN);
  93                 return -EINVAL;
  94         }
  95
  96         a->dataout_timeout_retries = dataout_timeout_retries;
  97         pr_debug("Set DataOut Timeout Retries to %u for"
  98                 " Initiator Node %s\n", a->dataout_timeout_retries,
  99                 iscsit_na_get_initiatorname(acl));
 100
 101         return 0;
 102 }
 103
 104 extern int iscsit_na_nopin_timeout(
 105         struct iscsi_node_acl *acl,
 106         u32 nopin_timeout)
 107 {
 108         struct iscsi_node_attrib *a = &acl->node_attrib;
 109         struct iscsi_session *sess;
 110         struct iscsi_conn *conn;
 111         struct se_node_acl *se_nacl = &a->nacl->se_node_acl;
 112         struct se_session *se_sess;
 113         u32 orig_nopin_timeout = a->nopin_timeout;
 114
 115         if (nopin_timeout > NA_NOPIN_TIMEOUT_MAX) {
 116                 pr_err("Requested NopIn Timeout %u larger than maximum"
 117                         " %u\n", nopin_timeout, NA_NOPIN_TIMEOUT_MAX);
 118                 return -EINVAL;
 119         } else if ((nopin_timeout < NA_NOPIN_TIMEOUT_MIN) &&
 120                    (nopin_timeout != 0)) {
 121                 pr_err("Requested NopIn Timeout %u smaller than"
 122                         " minimum %u and not 0\n", nopin_timeout,
 123                         NA_NOPIN_TIMEOUT_MIN);
 124                 return -EINVAL;
 125         }
 126
 127         a->nopin_timeout = nopin_timeout;
 128         pr_debug("Set NopIn Timeout to %u for Initiator"
 129                 " Node %s\n", a->nopin_timeout,
 130                 iscsit_na_get_initiatorname(acl));
 131         /*
 132          * Reenable disabled nopin_timeout timer for all iSCSI connections.
 133          */
 134         if (!orig_nopin_timeout) {
 135                 spin_lock_bh(&se_nacl->nacl_sess_lock);
 136                 se_sess = se_nacl->nacl_sess;
 137                 if (se_sess) {
 138                         sess = (struct iscsi_session *)se_sess->fabric_sess_ptr;
 139
 140                         spin_lock(&sess->conn_lock);
 141                         list_for_each_entry(conn, &sess->sess_conn_list,
 142                                         conn_list) {
 143                                 if (conn->conn_state !=
 144                                                 TARG_CONN_STATE_LOGGED_IN)
 145                                         continue;
 146
 147                                 spin_lock(&conn->nopin_timer_lock);
 148                                 __iscsit_start_nopin_timer(conn);
 149                                 spin_unlock(&conn->nopin_timer_lock);
 150                         }
 151                         spin_unlock(&sess->conn_lock);
 152                 }
 153                 spin_unlock_bh(&se_nacl->nacl_sess_lock);
 154         }
 155
 156         return 0;
 157 }
 158
 159 extern int iscsit_na_nopin_response_timeout(
 160         struct iscsi_node_acl *acl,
 161         u32 nopin_response_timeout)
 162 {
 163         struct iscsi_node_attrib *a = &acl->node_attrib;
 164
 165         if (nopin_response_timeout > NA_NOPIN_RESPONSE_TIMEOUT_MAX) {
 166                 pr_err("Requested NopIn Response Timeout %u larger"
 167                         " than maximum %u\n", nopin_response_timeout,
 168                                 NA_NOPIN_RESPONSE_TIMEOUT_MAX);
 169                 return -EINVAL;
 170         } else if (nopin_response_timeout < NA_NOPIN_RESPONSE_TIMEOUT_MIN) {
 171                 pr_err("Requested NopIn Response Timeout %u smaller"
 172                         " than minimum %u\n", nopin_response_timeout,
 173                                 NA_NOPIN_RESPONSE_TIMEOUT_MIN);
 174                 return -EINVAL;
 175         }
 176
 177         a->nopin_response_timeout = nopin_response_timeout;
 178         pr_debug("Set NopIn Response Timeout to %u for"
 179                 " Initiator Node %s\n", a->nopin_timeout,
 180                 iscsit_na_get_initiatorname(acl));
 181
 182         return 0;
 183 }
 184
 185 extern int iscsit_na_random_datain_pdu_offsets(
 186         struct iscsi_node_acl *acl,
 187         u32 random_datain_pdu_offsets)
 188 {
 189         struct iscsi_node_attrib *a = &acl->node_attrib;
 190
 191         if (random_datain_pdu_offsets != 0 && random_datain_pdu_offsets != 1) {
 192                 pr_err("Requested Random DataIN PDU Offsets: %u not"
 193                         " 0 or 1\n", random_datain_pdu_offsets);
 194                 return -EINVAL;
 195         }
 196
 197         a->random_datain_pdu_offsets = random_datain_pdu_offsets;
 198         pr_debug("Set Random DataIN PDU Offsets to %u for"
 199                 " Initiator Node %s\n", a->random_datain_pdu_offsets,
 200                 iscsit_na_get_initiatorname(acl));
 201
 202         return 0;
 203 }
 204
 205 extern int iscsit_na_random_datain_seq_offsets(
 206         struct iscsi_node_acl *acl,
 207         u32 random_datain_seq_offsets)
 208 {
 209         struct iscsi_node_attrib *a = &acl->node_attrib;
 210
 211         if (random_datain_seq_offsets != 0 && random_datain_seq_offsets != 1) {
 212                 pr_err("Requested Random DataIN Sequence Offsets: %u"
 213                         " not 0 or 1\n", random_datain_seq_offsets);
 214                 return -EINVAL;
 215         }
 216
 217         a->random_datain_seq_offsets = random_datain_seq_offsets;
 218         pr_debug("Set Random DataIN Sequence Offsets to %u for"
 219                 " Initiator Node %s\n", a->random_datain_seq_offsets,
 220                 iscsit_na_get_initiatorname(acl));
 221
 222         return 0;
 223 }
 224
 225 extern int iscsit_na_random_r2t_offsets(
 226         struct iscsi_node_acl *acl,
 227         u32 random_r2t_offsets)
 228 {
 229         struct iscsi_node_attrib *a = &acl->node_attrib;
 230
 231         if (random_r2t_offsets != 0 && random_r2t_offsets != 1) {
 232                 pr_err("Requested Random R2T Offsets: %u not"
 233                         " 0 or 1\n", random_r2t_offsets);
 234                 return -EINVAL;
 235         }
 236
 237         a->random_r2t_offsets = random_r2t_offsets;
 238         pr_debug("Set Random R2T Offsets to %u for"
 239                 " Initiator Node %s\n", a->random_r2t_offsets,
 240                 iscsit_na_get_initiatorname(acl));
 241
 242         return 0;
 243 }
 244
 245 extern int iscsit_na_default_erl(
 246         struct iscsi_node_acl *acl,
 247         u32 default_erl)
 248 {
 249         struct iscsi_node_attrib *a = &acl->node_attrib;
 250
 251         if (default_erl != 0 && default_erl != 1 && default_erl != 2) {
 252                 pr_err("Requested default ERL: %u not 0, 1, or 2\n",
 253                                 default_erl);
 254                 return -EINVAL;
 255         }
 256
 257         a->default_erl = default_erl;
 258         pr_debug("Set use ERL0 flag to %u for Initiator"
 259                 " Node %s\n", a->default_erl,
 260                 iscsit_na_get_initiatorname(acl));
 261
 262         return 0;
 263 }