drivers/target/iscsi/iscsi_target_nodeattrib.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*******************************************************************************
   3  * This file contains the main functions related to Initiator Node Attributes.
   4  *
   5  * (c) Copyright 2007-2013 Datera, Inc.
   6  *
   7  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
   8  *
   9  ******************************************************************************/
  10
  11 #include <target/target_core_base.h>
  12
  13 #include <target/iscsi/iscsi_target_core.h>
  14 #include "iscsi_target_device.h"
  15 #include "iscsi_target_tpg.h"
  16 #include "iscsi_target_util.h"
  17 #include "iscsi_target_nodeattrib.h"
  18
  19 static inline char *iscsit_na_get_initiatorname(
  20         struct iscsi_node_acl *nacl)
  21 {
  22         struct se_node_acl *se_nacl = &nacl->se_node_acl;
  23
  24         return &se_nacl->initiatorname[0];
  25 }
  26
  27 void iscsit_set_default_node_attribues(
  28         struct iscsi_node_acl *acl,
  29         struct iscsi_portal_group *tpg)
  30 {
  31         struct iscsi_node_attrib *a = &acl->node_attrib;
  32
  33         a->dataout_timeout = NA_DATAOUT_TIMEOUT;
  34         a->dataout_timeout_retries = NA_DATAOUT_TIMEOUT_RETRIES;
  35         a->nopin_timeout = NA_NOPIN_TIMEOUT;
  36         a->nopin_response_timeout = NA_NOPIN_RESPONSE_TIMEOUT;
  37         a->random_datain_pdu_offsets = NA_RANDOM_DATAIN_PDU_OFFSETS;
  38         a->random_datain_seq_offsets = NA_RANDOM_DATAIN_SEQ_OFFSETS;
  39         a->random_r2t_offsets = NA_RANDOM_R2T_OFFSETS;
  40         a->default_erl = tpg->tpg_attrib.default_erl;
  41 }
  42
  43 int iscsit_na_dataout_timeout(
  44         struct iscsi_node_acl *acl,
  45         u32 dataout_timeout)
  46 {
  47         struct iscsi_node_attrib *a = &acl->node_attrib;
  48
  49         if (dataout_timeout > NA_DATAOUT_TIMEOUT_MAX) {
  50                 pr_err("Requested DataOut Timeout %u larger than"
  51                         " maximum %u\n", dataout_timeout,
  52                         NA_DATAOUT_TIMEOUT_MAX);
  53                 return -EINVAL;
  54         } else if (dataout_timeout < NA_DATAOUT_TIMEOUT_MIX) {
  55                 pr_err("Requested DataOut Timeout %u smaller than"
  56                         " minimum %u\n", dataout_timeout,
  57                         NA_DATAOUT_TIMEOUT_MIX);
  58                 return -EINVAL;
  59         }
  60
  61         a->dataout_timeout = dataout_timeout;
  62         pr_debug("Set DataOut Timeout to %u for Initiator Node"
  63                 " %s\n", a->dataout_timeout, iscsit_na_get_initiatorname(acl));
  64
  65         return 0;
  66 }
  67
  68 int iscsit_na_dataout_timeout_retries(
  69         struct iscsi_node_acl *acl,
  70         u32 dataout_timeout_retries)
  71 {
  72         struct iscsi_node_attrib *a = &acl->node_attrib;
  73
  74         if (dataout_timeout_retries > NA_DATAOUT_TIMEOUT_RETRIES_MAX) {
  75                 pr_err("Requested DataOut Timeout Retries %u larger"
  76                         " than maximum %u", dataout_timeout_retries,
  77                                 NA_DATAOUT_TIMEOUT_RETRIES_MAX);
  78                 return -EINVAL;
  79         } else if (dataout_timeout_retries < NA_DATAOUT_TIMEOUT_RETRIES_MIN) {
  80                 pr_err("Requested DataOut Timeout Retries %u smaller"
  81                         " than minimum %u", dataout_timeout_retries,
  82                                 NA_DATAOUT_TIMEOUT_RETRIES_MIN);
  83                 return -EINVAL;
  84         }
  85
  86         a->dataout_timeout_retries = dataout_timeout_retries;
  87         pr_debug("Set DataOut Timeout Retries to %u for"
  88                 " Initiator Node %s\n", a->dataout_timeout_retries,
  89                 iscsit_na_get_initiatorname(acl));
  90
  91         return 0;
  92 }
  93
  94 int iscsit_na_nopin_timeout(
  95         struct iscsi_node_acl *acl,
  96         u32 nopin_timeout)
  97 {
  98         struct iscsi_node_attrib *a = &acl->node_attrib;
  99         struct iscsi_session *sess;
 100         struct iscsi_conn *conn;
 101         struct se_node_acl *se_nacl = &a->nacl->se_node_acl;
 102         struct se_session *se_sess;
 103         u32 orig_nopin_timeout = a->nopin_timeout;
 104
 105         if (nopin_timeout > NA_NOPIN_TIMEOUT_MAX) {
 106                 pr_err("Requested NopIn Timeout %u larger than maximum"
 107                         " %u\n", nopin_timeout, NA_NOPIN_TIMEOUT_MAX);
 108                 return -EINVAL;
 109         } else if ((nopin_timeout < NA_NOPIN_TIMEOUT_MIN) &&
 110                    (nopin_timeout != 0)) {
 111                 pr_err("Requested NopIn Timeout %u smaller than"
 112                         " minimum %u and not 0\n", nopin_timeout,
 113                         NA_NOPIN_TIMEOUT_MIN);
 114                 return -EINVAL;
 115         }
 116
 117         a->nopin_timeout = nopin_timeout;
 118         pr_debug("Set NopIn Timeout to %u for Initiator"
 119                 " Node %s\n", a->nopin_timeout,
 120                 iscsit_na_get_initiatorname(acl));
 121         /*
 122          * Reenable disabled nopin_timeout timer for all iSCSI connections.
 123          */
 124         if (!orig_nopin_timeout) {
 125                 spin_lock_bh(&se_nacl->nacl_sess_lock);
 126                 se_sess = se_nacl->nacl_sess;
 127                 if (se_sess) {
 128                         sess = se_sess->fabric_sess_ptr;
 129
 130                         spin_lock(&sess->conn_lock);
 131                         list_for_each_entry(conn, &sess->sess_conn_list,
 132                                         conn_list) {
 133                                 if (conn->conn_state !=
 134                                                 TARG_CONN_STATE_LOGGED_IN)
 135                                         continue;
 136
 137                                 spin_lock(&conn->nopin_timer_lock);
 138                                 __iscsit_start_nopin_timer(conn);
 139                                 spin_unlock(&conn->nopin_timer_lock);
 140                         }
 141                         spin_unlock(&sess->conn_lock);
 142                 }
 143                 spin_unlock_bh(&se_nacl->nacl_sess_lock);
 144         }
 145
 146         return 0;
 147 }
 148
 149 int iscsit_na_nopin_response_timeout(
 150         struct iscsi_node_acl *acl,
 151         u32 nopin_response_timeout)
 152 {
 153         struct iscsi_node_attrib *a = &acl->node_attrib;
 154
 155         if (nopin_response_timeout > NA_NOPIN_RESPONSE_TIMEOUT_MAX) {
 156                 pr_err("Requested NopIn Response Timeout %u larger"
 157                         " than maximum %u\n", nopin_response_timeout,
 158                                 NA_NOPIN_RESPONSE_TIMEOUT_MAX);
 159                 return -EINVAL;
 160         } else if (nopin_response_timeout < NA_NOPIN_RESPONSE_TIMEOUT_MIN) {
 161                 pr_err("Requested NopIn Response Timeout %u smaller"
 162                         " than minimum %u\n", nopin_response_timeout,
 163                                 NA_NOPIN_RESPONSE_TIMEOUT_MIN);
 164                 return -EINVAL;
 165         }
 166
 167         a->nopin_response_timeout = nopin_response_timeout;
 168         pr_debug("Set NopIn Response Timeout to %u for"
 169                 " Initiator Node %s\n", a->nopin_timeout,
 170                 iscsit_na_get_initiatorname(acl));
 171
 172         return 0;
 173 }
 174
 175 int iscsit_na_random_datain_pdu_offsets(
 176         struct iscsi_node_acl *acl,
 177         u32 random_datain_pdu_offsets)
 178 {
 179         struct iscsi_node_attrib *a = &acl->node_attrib;
 180
 181         if (random_datain_pdu_offsets != 0 && random_datain_pdu_offsets != 1) {
 182                 pr_err("Requested Random DataIN PDU Offsets: %u not"
 183                         " 0 or 1\n", random_datain_pdu_offsets);
 184                 return -EINVAL;
 185         }
 186
 187         a->random_datain_pdu_offsets = random_datain_pdu_offsets;
 188         pr_debug("Set Random DataIN PDU Offsets to %u for"
 189                 " Initiator Node %s\n", a->random_datain_pdu_offsets,
 190                 iscsit_na_get_initiatorname(acl));
 191
 192         return 0;
 193 }
 194
 195 int iscsit_na_random_datain_seq_offsets(
 196         struct iscsi_node_acl *acl,
 197         u32 random_datain_seq_offsets)
 198 {
 199         struct iscsi_node_attrib *a = &acl->node_attrib;
 200
 201         if (random_datain_seq_offsets != 0 && random_datain_seq_offsets != 1) {
 202                 pr_err("Requested Random DataIN Sequence Offsets: %u"
 203                         " not 0 or 1\n", random_datain_seq_offsets);
 204                 return -EINVAL;
 205         }
 206
 207         a->random_datain_seq_offsets = random_datain_seq_offsets;
 208         pr_debug("Set Random DataIN Sequence Offsets to %u for"
 209                 " Initiator Node %s\n", a->random_datain_seq_offsets,
 210                 iscsit_na_get_initiatorname(acl));
 211
 212         return 0;
 213 }
 214
 215 int iscsit_na_random_r2t_offsets(
 216         struct iscsi_node_acl *acl,
 217         u32 random_r2t_offsets)
 218 {
 219         struct iscsi_node_attrib *a = &acl->node_attrib;
 220
 221         if (random_r2t_offsets != 0 && random_r2t_offsets != 1) {
 222                 pr_err("Requested Random R2T Offsets: %u not"
 223                         " 0 or 1\n", random_r2t_offsets);
 224                 return -EINVAL;
 225         }
 226
 227         a->random_r2t_offsets = random_r2t_offsets;
 228         pr_debug("Set Random R2T Offsets to %u for"
 229                 " Initiator Node %s\n", a->random_r2t_offsets,
 230                 iscsit_na_get_initiatorname(acl));
 231
 232         return 0;
 233 }
 234
 235 int iscsit_na_default_erl(
 236         struct iscsi_node_acl *acl,
 237         u32 default_erl)
 238 {
 239         struct iscsi_node_attrib *a = &acl->node_attrib;
 240
 241         if (default_erl != 0 && default_erl != 1 && default_erl != 2) {
 242                 pr_err("Requested default ERL: %u not 0, 1, or 2\n",
 243                                 default_erl);
 244                 return -EINVAL;
 245         }
 246
 247         a->default_erl = default_erl;
 248         pr_debug("Set use ERL0 flag to %u for Initiator"
 249                 " Node %s\n", a->default_erl,
 250                 iscsit_na_get_initiatorname(acl));
 251
 252         return 0;
 253 }