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         struct iscsi_portal_group *tpg)
  38 {
  39         struct iscsi_node_attrib *a = &acl->node_attrib;
  40
  41         a->dataout_timeout = NA_DATAOUT_TIMEOUT;
  42         a->dataout_timeout_retries = NA_DATAOUT_TIMEOUT_RETRIES;
  43         a->nopin_timeout = NA_NOPIN_TIMEOUT;
  44         a->nopin_response_timeout = NA_NOPIN_RESPONSE_TIMEOUT;
  45         a->random_datain_pdu_offsets = NA_RANDOM_DATAIN_PDU_OFFSETS;
  46         a->random_datain_seq_offsets = NA_RANDOM_DATAIN_SEQ_OFFSETS;
  47         a->random_r2t_offsets = NA_RANDOM_R2T_OFFSETS;
  48         a->default_erl = tpg->tpg_attrib.default_erl;
  49 }
  50
  51 int iscsit_na_dataout_timeout(
  52         struct iscsi_node_acl *acl,
  53         u32 dataout_timeout)
  54 {
  55         struct iscsi_node_attrib *a = &acl->node_attrib;
  56
  57         if (dataout_timeout > NA_DATAOUT_TIMEOUT_MAX) {
  58                 pr_err("Requested DataOut Timeout %u larger than"
  59                         " maximum %u\n", dataout_timeout,
  60                         NA_DATAOUT_TIMEOUT_MAX);
  61                 return -EINVAL;
  62         } else if (dataout_timeout < NA_DATAOUT_TIMEOUT_MIX) {
  63                 pr_err("Requested DataOut Timeout %u smaller than"
  64                         " minimum %u\n", dataout_timeout,
  65                         NA_DATAOUT_TIMEOUT_MIX);
  66                 return -EINVAL;
  67         }
  68
  69         a->dataout_timeout = dataout_timeout;
  70         pr_debug("Set DataOut Timeout to %u for Initiator Node"
  71                 " %s\n", a->dataout_timeout, iscsit_na_get_initiatorname(acl));
  72
  73         return 0;
  74 }
  75
  76 int iscsit_na_dataout_timeout_retries(
  77         struct iscsi_node_acl *acl,
  78         u32 dataout_timeout_retries)
  79 {
  80         struct iscsi_node_attrib *a = &acl->node_attrib;
  81
  82         if (dataout_timeout_retries > NA_DATAOUT_TIMEOUT_RETRIES_MAX) {
  83                 pr_err("Requested DataOut Timeout Retries %u larger"
  84                         " than maximum %u", dataout_timeout_retries,
  85                                 NA_DATAOUT_TIMEOUT_RETRIES_MAX);
  86                 return -EINVAL;
  87         } else if (dataout_timeout_retries < NA_DATAOUT_TIMEOUT_RETRIES_MIN) {
  88                 pr_err("Requested DataOut Timeout Retries %u smaller"
  89                         " than minimum %u", dataout_timeout_retries,
  90                                 NA_DATAOUT_TIMEOUT_RETRIES_MIN);
  91                 return -EINVAL;
  92         }
  93
  94         a->dataout_timeout_retries = dataout_timeout_retries;
  95         pr_debug("Set DataOut Timeout Retries to %u for"
  96                 " Initiator Node %s\n", a->dataout_timeout_retries,
  97                 iscsit_na_get_initiatorname(acl));
  98
  99         return 0;
 100 }
 101
 102 int iscsit_na_nopin_timeout(
 103         struct iscsi_node_acl *acl,
 104         u32 nopin_timeout)
 105 {
 106         struct iscsi_node_attrib *a = &acl->node_attrib;
 107         struct iscsi_session *sess;
 108         struct iscsi_conn *conn;
 109         struct se_node_acl *se_nacl = &a->nacl->se_node_acl;
 110         struct se_session *se_sess;
 111         u32 orig_nopin_timeout = a->nopin_timeout;
 112
 113         if (nopin_timeout > NA_NOPIN_TIMEOUT_MAX) {
 114                 pr_err("Requested NopIn Timeout %u larger than maximum"
 115                         " %u\n", nopin_timeout, NA_NOPIN_TIMEOUT_MAX);
 116                 return -EINVAL;
 117         } else if ((nopin_timeout < NA_NOPIN_TIMEOUT_MIN) &&
 118                    (nopin_timeout != 0)) {
 119                 pr_err("Requested NopIn Timeout %u smaller than"
 120                         " minimum %u and not 0\n", nopin_timeout,
 121                         NA_NOPIN_TIMEOUT_MIN);
 122                 return -EINVAL;
 123         }
 124
 125         a->nopin_timeout = nopin_timeout;
 126         pr_debug("Set NopIn Timeout to %u for Initiator"
 127                 " Node %s\n", a->nopin_timeout,
 128                 iscsit_na_get_initiatorname(acl));
 129         /*
 130          * Reenable disabled nopin_timeout timer for all iSCSI connections.
 131          */
 132         if (!orig_nopin_timeout) {
 133                 spin_lock_bh(&se_nacl->nacl_sess_lock);
 134                 se_sess = se_nacl->nacl_sess;
 135                 if (se_sess) {
 136                         sess = se_sess->fabric_sess_ptr;
 137
 138                         spin_lock(&sess->conn_lock);
 139                         list_for_each_entry(conn, &sess->sess_conn_list,
 140                                         conn_list) {
 141                                 if (conn->conn_state !=
 142                                                 TARG_CONN_STATE_LOGGED_IN)
 143                                         continue;
 144
 145                                 spin_lock(&conn->nopin_timer_lock);
 146                                 __iscsit_start_nopin_timer(conn);
 147                                 spin_unlock(&conn->nopin_timer_lock);
 148                         }
 149                         spin_unlock(&sess->conn_lock);
 150                 }
 151                 spin_unlock_bh(&se_nacl->nacl_sess_lock);
 152         }
 153
 154         return 0;
 155 }
 156
 157 int iscsit_na_nopin_response_timeout(
 158         struct iscsi_node_acl *acl,
 159         u32 nopin_response_timeout)
 160 {
 161         struct iscsi_node_attrib *a = &acl->node_attrib;
 162
 163         if (nopin_response_timeout > NA_NOPIN_RESPONSE_TIMEOUT_MAX) {
 164                 pr_err("Requested NopIn Response Timeout %u larger"
 165                         " than maximum %u\n", nopin_response_timeout,
 166                                 NA_NOPIN_RESPONSE_TIMEOUT_MAX);
 167                 return -EINVAL;
 168         } else if (nopin_response_timeout < NA_NOPIN_RESPONSE_TIMEOUT_MIN) {
 169                 pr_err("Requested NopIn Response Timeout %u smaller"
 170                         " than minimum %u\n", nopin_response_timeout,
 171                                 NA_NOPIN_RESPONSE_TIMEOUT_MIN);
 172                 return -EINVAL;
 173         }
 174
 175         a->nopin_response_timeout = nopin_response_timeout;
 176         pr_debug("Set NopIn Response Timeout to %u for"
 177                 " Initiator Node %s\n", a->nopin_timeout,
 178                 iscsit_na_get_initiatorname(acl));
 179
 180         return 0;
 181 }
 182
 183 int iscsit_na_random_datain_pdu_offsets(
 184         struct iscsi_node_acl *acl,
 185         u32 random_datain_pdu_offsets)
 186 {
 187         struct iscsi_node_attrib *a = &acl->node_attrib;
 188
 189         if (random_datain_pdu_offsets != 0 && random_datain_pdu_offsets != 1) {
 190                 pr_err("Requested Random DataIN PDU Offsets: %u not"
 191                         " 0 or 1\n", random_datain_pdu_offsets);
 192                 return -EINVAL;
 193         }
 194
 195         a->random_datain_pdu_offsets = random_datain_pdu_offsets;
 196         pr_debug("Set Random DataIN PDU Offsets to %u for"
 197                 " Initiator Node %s\n", a->random_datain_pdu_offsets,
 198                 iscsit_na_get_initiatorname(acl));
 199
 200         return 0;
 201 }
 202
 203 int iscsit_na_random_datain_seq_offsets(
 204         struct iscsi_node_acl *acl,
 205         u32 random_datain_seq_offsets)
 206 {
 207         struct iscsi_node_attrib *a = &acl->node_attrib;
 208
 209         if (random_datain_seq_offsets != 0 && random_datain_seq_offsets != 1) {
 210                 pr_err("Requested Random DataIN Sequence Offsets: %u"
 211                         " not 0 or 1\n", random_datain_seq_offsets);
 212                 return -EINVAL;
 213         }
 214
 215         a->random_datain_seq_offsets = random_datain_seq_offsets;
 216         pr_debug("Set Random DataIN Sequence Offsets to %u for"
 217                 " Initiator Node %s\n", a->random_datain_seq_offsets,
 218                 iscsit_na_get_initiatorname(acl));
 219
 220         return 0;
 221 }
 222
 223 int iscsit_na_random_r2t_offsets(
 224         struct iscsi_node_acl *acl,
 225         u32 random_r2t_offsets)
 226 {
 227         struct iscsi_node_attrib *a = &acl->node_attrib;
 228
 229         if (random_r2t_offsets != 0 && random_r2t_offsets != 1) {
 230                 pr_err("Requested Random R2T Offsets: %u not"
 231                         " 0 or 1\n", random_r2t_offsets);
 232                 return -EINVAL;
 233         }
 234
 235         a->random_r2t_offsets = random_r2t_offsets;
 236         pr_debug("Set Random R2T Offsets to %u for"
 237                 " Initiator Node %s\n", a->random_r2t_offsets,
 238                 iscsit_na_get_initiatorname(acl));
 239
 240         return 0;
 241 }
 242
 243 int iscsit_na_default_erl(
 244         struct iscsi_node_acl *acl,
 245         u32 default_erl)
 246 {
 247         struct iscsi_node_attrib *a = &acl->node_attrib;
 248
 249         if (default_erl != 0 && default_erl != 1 && default_erl != 2) {
 250                 pr_err("Requested default ERL: %u not 0, 1, or 2\n",
 251                                 default_erl);
 252                 return -EINVAL;
 253         }
 254
 255         a->default_erl = default_erl;
 256         pr_debug("Set use ERL0 flag to %u for Initiator"
 257                 " Node %s\n", a->default_erl,
 258                 iscsit_na_get_initiatorname(acl));
 259
 260         return 0;
 261 }