drivers/target/iscsi/iscsi_target_nodeattrib.c

   1 /*******************************************************************************
   2  * This file contains the main functions related to Initiator Node Attributes.
   3  *
   4  * (c) Copyright 2007-2013 Datera, Inc.
   5  *
   6  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  ******************************************************************************/
  18
  19 #include <target/target_core_base.h>
  20
  21 #include "iscsi_target_core.h"
  22 #include "iscsi_target_device.h"
  23 #include "iscsi_target_tpg.h"
  24 #include "iscsi_target_util.h"
  25 #include "iscsi_target_nodeattrib.h"
  26
  27 static inline char *iscsit_na_get_initiatorname(
  28         struct iscsi_node_acl *nacl)
  29 {
  30         struct se_node_acl *se_nacl = &nacl->se_node_acl;
  31
  32         return &se_nacl->initiatorname[0];
  33 }
  34
  35 void iscsit_set_default_node_attribues(
  36         struct iscsi_node_acl *acl)
  37 {
  38         struct iscsi_node_attrib *a = &acl->node_attrib;
  39
  40         a->dataout_timeout = NA_DATAOUT_TIMEOUT;
  41         a->dataout_timeout_retries = NA_DATAOUT_TIMEOUT_RETRIES;
  42         a->nopin_timeout = NA_NOPIN_TIMEOUT;
  43         a->nopin_response_timeout = NA_NOPIN_RESPONSE_TIMEOUT;
  44         a->random_datain_pdu_offsets = NA_RANDOM_DATAIN_PDU_OFFSETS;
  45         a->random_datain_seq_offsets = NA_RANDOM_DATAIN_SEQ_OFFSETS;
  46         a->random_r2t_offsets = NA_RANDOM_R2T_OFFSETS;
  47         a->default_erl = NA_DEFAULT_ERL;
  48 }
  49
  50 int iscsit_na_dataout_timeout(
  51         struct iscsi_node_acl *acl,
  52         u32 dataout_timeout)
  53 {
  54         struct iscsi_node_attrib *a = &acl->node_attrib;
  55
  56         if (dataout_timeout > NA_DATAOUT_TIMEOUT_MAX) {
  57                 pr_err("Requested DataOut Timeout %u larger than"
  58                         " maximum %u\n", dataout_timeout,
  59                         NA_DATAOUT_TIMEOUT_MAX);
  60                 return -EINVAL;
  61         } else if (dataout_timeout < NA_DATAOUT_TIMEOUT_MIX) {
  62                 pr_err("Requested DataOut Timeout %u smaller than"
  63                         " minimum %u\n", dataout_timeout,
  64                         NA_DATAOUT_TIMEOUT_MIX);
  65                 return -EINVAL;
  66         }
  67
  68         a->dataout_timeout = dataout_timeout;
  69         pr_debug("Set DataOut Timeout to %u for Initiator Node"
  70                 " %s\n", a->dataout_timeout, iscsit_na_get_initiatorname(acl));
  71
  72         return 0;
  73 }
  74
  75 int iscsit_na_dataout_timeout_retries(
  76         struct iscsi_node_acl *acl,
  77         u32 dataout_timeout_retries)
  78 {
  79         struct iscsi_node_attrib *a = &acl->node_attrib;
  80
  81         if (dataout_timeout_retries > NA_DATAOUT_TIMEOUT_RETRIES_MAX) {
  82                 pr_err("Requested DataOut Timeout Retries %u larger"
  83                         " than maximum %u", dataout_timeout_retries,
  84                                 NA_DATAOUT_TIMEOUT_RETRIES_MAX);
  85                 return -EINVAL;
  86         } else if (dataout_timeout_retries < NA_DATAOUT_TIMEOUT_RETRIES_MIN) {
  87                 pr_err("Requested DataOut Timeout Retries %u smaller"
  88                         " than minimum %u", dataout_timeout_retries,
  89                                 NA_DATAOUT_TIMEOUT_RETRIES_MIN);
  90                 return -EINVAL;
  91         }
  92
  93         a->dataout_timeout_retries = dataout_timeout_retries;
  94         pr_debug("Set DataOut Timeout Retries to %u for"
  95                 " Initiator Node %s\n", a->dataout_timeout_retries,
  96                 iscsit_na_get_initiatorname(acl));
  97
  98         return 0;
  99 }
 100
 101 int iscsit_na_nopin_timeout(
 102         struct iscsi_node_acl *acl,
 103         u32 nopin_timeout)
 104 {
 105         struct iscsi_node_attrib *a = &acl->node_attrib;
 106         struct iscsi_session *sess;
 107         struct iscsi_conn *conn;
 108         struct se_node_acl *se_nacl = &a->nacl->se_node_acl;
 109         struct se_session *se_sess;
 110         u32 orig_nopin_timeout = a->nopin_timeout;
 111
 112         if (nopin_timeout > NA_NOPIN_TIMEOUT_MAX) {
 113                 pr_err("Requested NopIn Timeout %u larger than maximum"
 114                         " %u\n", nopin_timeout, NA_NOPIN_TIMEOUT_MAX);
 115                 return -EINVAL;
 116         } else if ((nopin_timeout < NA_NOPIN_TIMEOUT_MIN) &&
 117                    (nopin_timeout != 0)) {
 118                 pr_err("Requested NopIn Timeout %u smaller than"
 119                         " minimum %u and not 0\n", nopin_timeout,
 120                         NA_NOPIN_TIMEOUT_MIN);
 121                 return -EINVAL;
 122         }
 123
 124         a->nopin_timeout = nopin_timeout;
 125         pr_debug("Set NopIn Timeout to %u for Initiator"
 126                 " Node %s\n", a->nopin_timeout,
 127                 iscsit_na_get_initiatorname(acl));
 128         /*
 129          * Reenable disabled nopin_timeout timer for all iSCSI connections.
 130          */
 131         if (!orig_nopin_timeout) {
 132                 spin_lock_bh(&se_nacl->nacl_sess_lock);
 133                 se_sess = se_nacl->nacl_sess;
 134                 if (se_sess) {
 135                         sess = se_sess->fabric_sess_ptr;
 136
 137                         spin_lock(&sess->conn_lock);
 138                         list_for_each_entry(conn, &sess->sess_conn_list,
 139                                         conn_list) {
 140                                 if (conn->conn_state !=
 141                                                 TARG_CONN_STATE_LOGGED_IN)
 142                                         continue;
 143
 144                                 spin_lock(&conn->nopin_timer_lock);
 145                                 __iscsit_start_nopin_timer(conn);
 146                                 spin_unlock(&conn->nopin_timer_lock);
 147                         }
 148                         spin_unlock(&sess->conn_lock);
 149                 }
 150                 spin_unlock_bh(&se_nacl->nacl_sess_lock);
 151         }
 152
 153         return 0;
 154 }
 155
 156 int iscsit_na_nopin_response_timeout(
 157         struct iscsi_node_acl *acl,
 158         u32 nopin_response_timeout)
 159 {
 160         struct iscsi_node_attrib *a = &acl->node_attrib;
 161
 162         if (nopin_response_timeout > NA_NOPIN_RESPONSE_TIMEOUT_MAX) {
 163                 pr_err("Requested NopIn Response Timeout %u larger"
 164                         " than maximum %u\n", nopin_response_timeout,
 165                                 NA_NOPIN_RESPONSE_TIMEOUT_MAX);
 166                 return -EINVAL;
 167         } else if (nopin_response_timeout < NA_NOPIN_RESPONSE_TIMEOUT_MIN) {
 168                 pr_err("Requested NopIn Response Timeout %u smaller"
 169                         " than minimum %u\n", nopin_response_timeout,
 170                                 NA_NOPIN_RESPONSE_TIMEOUT_MIN);
 171                 return -EINVAL;
 172         }
 173
 174         a->nopin_response_timeout = nopin_response_timeout;
 175         pr_debug("Set NopIn Response Timeout to %u for"
 176                 " Initiator Node %s\n", a->nopin_timeout,
 177                 iscsit_na_get_initiatorname(acl));
 178
 179         return 0;
 180 }
 181
 182 int iscsit_na_random_datain_pdu_offsets(
 183         struct iscsi_node_acl *acl,
 184         u32 random_datain_pdu_offsets)
 185 {
 186         struct iscsi_node_attrib *a = &acl->node_attrib;
 187
 188         if (random_datain_pdu_offsets != 0 && random_datain_pdu_offsets != 1) {
 189                 pr_err("Requested Random DataIN PDU Offsets: %u not"
 190                         " 0 or 1\n", random_datain_pdu_offsets);
 191                 return -EINVAL;
 192         }
 193
 194         a->random_datain_pdu_offsets = random_datain_pdu_offsets;
 195         pr_debug("Set Random DataIN PDU Offsets to %u for"
 196                 " Initiator Node %s\n", a->random_datain_pdu_offsets,
 197                 iscsit_na_get_initiatorname(acl));
 198
 199         return 0;
 200 }
 201
 202 int iscsit_na_random_datain_seq_offsets(
 203         struct iscsi_node_acl *acl,
 204         u32 random_datain_seq_offsets)
 205 {
 206         struct iscsi_node_attrib *a = &acl->node_attrib;
 207
 208         if (random_datain_seq_offsets != 0 && random_datain_seq_offsets != 1) {
 209                 pr_err("Requested Random DataIN Sequence Offsets: %u"
 210                         " not 0 or 1\n", random_datain_seq_offsets);
 211                 return -EINVAL;
 212         }
 213
 214         a->random_datain_seq_offsets = random_datain_seq_offsets;
 215         pr_debug("Set Random DataIN Sequence Offsets to %u for"
 216                 " Initiator Node %s\n", a->random_datain_seq_offsets,
 217                 iscsit_na_get_initiatorname(acl));
 218
 219         return 0;
 220 }
 221
 222 int iscsit_na_random_r2t_offsets(
 223         struct iscsi_node_acl *acl,
 224         u32 random_r2t_offsets)
 225 {
 226         struct iscsi_node_attrib *a = &acl->node_attrib;
 227
 228         if (random_r2t_offsets != 0 && random_r2t_offsets != 1) {
 229                 pr_err("Requested Random R2T Offsets: %u not"
 230                         " 0 or 1\n", random_r2t_offsets);
 231                 return -EINVAL;
 232         }
 233
 234         a->random_r2t_offsets = random_r2t_offsets;
 235         pr_debug("Set Random R2T Offsets to %u for"
 236                 " Initiator Node %s\n", a->random_r2t_offsets,
 237                 iscsit_na_get_initiatorname(acl));
 238
 239         return 0;
 240 }
 241
 242 int iscsit_na_default_erl(
 243         struct iscsi_node_acl *acl,
 244         u32 default_erl)
 245 {
 246         struct iscsi_node_attrib *a = &acl->node_attrib;
 247
 248         if (default_erl != 0 && default_erl != 1 && default_erl != 2) {
 249                 pr_err("Requested default ERL: %u not 0, 1, or 2\n",
 250                                 default_erl);
 251                 return -EINVAL;
 252         }
 253
 254         a->default_erl = default_erl;
 255         pr_debug("Set use ERL0 flag to %u for Initiator"
 256                 " Node %s\n", a->default_erl,
 257                 iscsit_na_get_initiatorname(acl));
 258
 259         return 0;
 260 }