1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains the login functions used by the iSCSI Target driver. 3e48354ceSNicholas Bellinger * 4e48354ceSNicholas Bellinger * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. 5e48354ceSNicholas Bellinger * 6e48354ceSNicholas Bellinger * Licensed to the Linux Foundation under the General Public License (GPL) version 2. 7e48354ceSNicholas Bellinger * 8e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 9e48354ceSNicholas Bellinger * 10e48354ceSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 11e48354ceSNicholas Bellinger * it under the terms of the GNU General Public License as published by 12e48354ceSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 13e48354ceSNicholas Bellinger * (at your option) any later version. 14e48354ceSNicholas Bellinger * 15e48354ceSNicholas Bellinger * This program is distributed in the hope that it will be useful, 16e48354ceSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 17e48354ceSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18e48354ceSNicholas Bellinger * GNU General Public License for more details. 19e48354ceSNicholas Bellinger ******************************************************************************/ 20e48354ceSNicholas Bellinger 21e48354ceSNicholas Bellinger #include <linux/string.h> 22e48354ceSNicholas Bellinger #include <linux/kthread.h> 23e48354ceSNicholas Bellinger #include <linux/crypto.h> 2440401530SAl Viro #include <linux/idr.h> 25e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 26e48354ceSNicholas Bellinger #include <target/target_core_base.h> 27c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 28e48354ceSNicholas Bellinger 29e48354ceSNicholas Bellinger #include "iscsi_target_core.h" 30e48354ceSNicholas Bellinger #include "iscsi_target_tq.h" 31e48354ceSNicholas Bellinger #include "iscsi_target_device.h" 32e48354ceSNicholas Bellinger #include "iscsi_target_nego.h" 33e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 34e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 35e48354ceSNicholas Bellinger #include "iscsi_target_login.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_stat.h" 37e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 38e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 39e48354ceSNicholas Bellinger #include "iscsi_target.h" 40e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 41e48354ceSNicholas Bellinger 42e48354ceSNicholas Bellinger extern struct idr sess_idr; 43e48354ceSNicholas Bellinger extern struct mutex auth_id_lock; 44e48354ceSNicholas Bellinger extern spinlock_t sess_idr_lock; 45e48354ceSNicholas Bellinger 46e48354ceSNicholas Bellinger static int iscsi_login_init_conn(struct iscsi_conn *conn) 47e48354ceSNicholas Bellinger { 48e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->conn_list); 49e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->conn_cmd_list); 50e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->immed_queue_list); 51e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->response_queue_list); 52e48354ceSNicholas Bellinger init_completion(&conn->conn_post_wait_comp); 53e48354ceSNicholas Bellinger init_completion(&conn->conn_wait_comp); 54e48354ceSNicholas Bellinger init_completion(&conn->conn_wait_rcfr_comp); 55e48354ceSNicholas Bellinger init_completion(&conn->conn_waiting_on_uc_comp); 56e48354ceSNicholas Bellinger init_completion(&conn->conn_logout_comp); 57e48354ceSNicholas Bellinger init_completion(&conn->rx_half_close_comp); 58e48354ceSNicholas Bellinger init_completion(&conn->tx_half_close_comp); 59e48354ceSNicholas Bellinger spin_lock_init(&conn->cmd_lock); 60e48354ceSNicholas Bellinger spin_lock_init(&conn->conn_usage_lock); 61e48354ceSNicholas Bellinger spin_lock_init(&conn->immed_queue_lock); 62e48354ceSNicholas Bellinger spin_lock_init(&conn->nopin_timer_lock); 63e48354ceSNicholas Bellinger spin_lock_init(&conn->response_queue_lock); 64e48354ceSNicholas Bellinger spin_lock_init(&conn->state_lock); 65e48354ceSNicholas Bellinger 66e48354ceSNicholas Bellinger if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) { 67e48354ceSNicholas Bellinger pr_err("Unable to allocate conn->conn_cpumask\n"); 68e48354ceSNicholas Bellinger return -ENOMEM; 69e48354ceSNicholas Bellinger } 70e48354ceSNicholas Bellinger 71e48354ceSNicholas Bellinger return 0; 72e48354ceSNicholas Bellinger } 73e48354ceSNicholas Bellinger 74e48354ceSNicholas Bellinger /* 75e48354ceSNicholas Bellinger * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup 76e48354ceSNicholas Bellinger * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel 77e48354ceSNicholas Bellinger */ 78e48354ceSNicholas Bellinger int iscsi_login_setup_crypto(struct iscsi_conn *conn) 79e48354ceSNicholas Bellinger { 80e48354ceSNicholas Bellinger /* 81e48354ceSNicholas Bellinger * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts 82e48354ceSNicholas Bellinger * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback 83e48354ceSNicholas Bellinger * to software 1x8 byte slicing from crc32c.ko 84e48354ceSNicholas Bellinger */ 85e48354ceSNicholas Bellinger conn->conn_rx_hash.flags = 0; 86e48354ceSNicholas Bellinger conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0, 87e48354ceSNicholas Bellinger CRYPTO_ALG_ASYNC); 88e48354ceSNicholas Bellinger if (IS_ERR(conn->conn_rx_hash.tfm)) { 89e48354ceSNicholas Bellinger pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n"); 90e48354ceSNicholas Bellinger return -ENOMEM; 91e48354ceSNicholas Bellinger } 92e48354ceSNicholas Bellinger 93e48354ceSNicholas Bellinger conn->conn_tx_hash.flags = 0; 94e48354ceSNicholas Bellinger conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0, 95e48354ceSNicholas Bellinger CRYPTO_ALG_ASYNC); 96e48354ceSNicholas Bellinger if (IS_ERR(conn->conn_tx_hash.tfm)) { 97e48354ceSNicholas Bellinger pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n"); 98e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_rx_hash.tfm); 99e48354ceSNicholas Bellinger return -ENOMEM; 100e48354ceSNicholas Bellinger } 101e48354ceSNicholas Bellinger 102e48354ceSNicholas Bellinger return 0; 103e48354ceSNicholas Bellinger } 104e48354ceSNicholas Bellinger 105e48354ceSNicholas Bellinger static int iscsi_login_check_initiator_version( 106e48354ceSNicholas Bellinger struct iscsi_conn *conn, 107e48354ceSNicholas Bellinger u8 version_max, 108e48354ceSNicholas Bellinger u8 version_min) 109e48354ceSNicholas Bellinger { 110e48354ceSNicholas Bellinger if ((version_max != 0x00) || (version_min != 0x00)) { 111e48354ceSNicholas Bellinger pr_err("Unsupported iSCSI IETF Pre-RFC Revision," 112e48354ceSNicholas Bellinger " version Min/Max 0x%02x/0x%02x, rejecting login.\n", 113e48354ceSNicholas Bellinger version_min, version_max); 114e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 115e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_VERSION); 116e48354ceSNicholas Bellinger return -1; 117e48354ceSNicholas Bellinger } 118e48354ceSNicholas Bellinger 119e48354ceSNicholas Bellinger return 0; 120e48354ceSNicholas Bellinger } 121e48354ceSNicholas Bellinger 122e48354ceSNicholas Bellinger int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn) 123e48354ceSNicholas Bellinger { 124e48354ceSNicholas Bellinger int sessiontype; 125e48354ceSNicholas Bellinger struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL; 126e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->tpg; 127e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL, *sess_p = NULL; 128e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 129e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 130e48354ceSNicholas Bellinger 131e48354ceSNicholas Bellinger initiatorname_param = iscsi_find_param_from_key( 132e48354ceSNicholas Bellinger INITIATORNAME, conn->param_list); 133e48354ceSNicholas Bellinger if (!initiatorname_param) 134e48354ceSNicholas Bellinger return -1; 135e48354ceSNicholas Bellinger 136e48354ceSNicholas Bellinger sessiontype_param = iscsi_find_param_from_key( 137e48354ceSNicholas Bellinger SESSIONTYPE, conn->param_list); 138e48354ceSNicholas Bellinger if (!sessiontype_param) 139e48354ceSNicholas Bellinger return -1; 140e48354ceSNicholas Bellinger 141e48354ceSNicholas Bellinger sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0; 142e48354ceSNicholas Bellinger 143e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 144e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 145e48354ceSNicholas Bellinger sess_list) { 146e48354ceSNicholas Bellinger 1478359cf43SJörn Engel sess_p = se_sess->fabric_sess_ptr; 148e48354ceSNicholas Bellinger spin_lock(&sess_p->conn_lock); 149e48354ceSNicholas Bellinger if (atomic_read(&sess_p->session_fall_back_to_erl0) || 150e48354ceSNicholas Bellinger atomic_read(&sess_p->session_logout) || 151e48354ceSNicholas Bellinger (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { 152e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 153e48354ceSNicholas Bellinger continue; 154e48354ceSNicholas Bellinger } 1558359cf43SJörn Engel if (!memcmp(sess_p->isid, conn->sess->isid, 6) && 1568359cf43SJörn Engel (!strcmp(sess_p->sess_ops->InitiatorName, 1578359cf43SJörn Engel initiatorname_param->value) && 158e48354ceSNicholas Bellinger (sess_p->sess_ops->SessionType == sessiontype))) { 159e48354ceSNicholas Bellinger atomic_set(&sess_p->session_reinstatement, 1); 160e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 161e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess_p); 162e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess_p); 163e48354ceSNicholas Bellinger sess = sess_p; 164e48354ceSNicholas Bellinger break; 165e48354ceSNicholas Bellinger } 166e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 167e48354ceSNicholas Bellinger } 168e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 169e48354ceSNicholas Bellinger /* 170e48354ceSNicholas Bellinger * If the Time2Retain handler has expired, the session is already gone. 171e48354ceSNicholas Bellinger */ 172e48354ceSNicholas Bellinger if (!sess) 173e48354ceSNicholas Bellinger return 0; 174e48354ceSNicholas Bellinger 175e48354ceSNicholas Bellinger pr_debug("%s iSCSI Session SID %u is still active for %s," 176e48354ceSNicholas Bellinger " preforming session reinstatement.\n", (sessiontype) ? 177e48354ceSNicholas Bellinger "Discovery" : "Normal", sess->sid, 178e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 179e48354ceSNicholas Bellinger 180e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 181e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) { 182e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 183e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 18499367f01SNicholas Bellinger target_put_session(sess->se_sess); 18599367f01SNicholas Bellinger return 0; 186e48354ceSNicholas Bellinger } 187e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 188e48354ceSNicholas Bellinger 189e48354ceSNicholas Bellinger iscsit_stop_session(sess, 1, 1); 190e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 191e48354ceSNicholas Bellinger 19299367f01SNicholas Bellinger target_put_session(sess->se_sess); 19399367f01SNicholas Bellinger return 0; 194e48354ceSNicholas Bellinger } 195e48354ceSNicholas Bellinger 196e48354ceSNicholas Bellinger static void iscsi_login_set_conn_values( 197e48354ceSNicholas Bellinger struct iscsi_session *sess, 198e48354ceSNicholas Bellinger struct iscsi_conn *conn, 199e48354ceSNicholas Bellinger u16 cid) 200e48354ceSNicholas Bellinger { 201e48354ceSNicholas Bellinger conn->sess = sess; 202e48354ceSNicholas Bellinger conn->cid = cid; 203e48354ceSNicholas Bellinger /* 204e48354ceSNicholas Bellinger * Generate a random Status sequence number (statsn) for the new 205e48354ceSNicholas Bellinger * iSCSI connection. 206e48354ceSNicholas Bellinger */ 207e48354ceSNicholas Bellinger get_random_bytes(&conn->stat_sn, sizeof(u32)); 208e48354ceSNicholas Bellinger 209e48354ceSNicholas Bellinger mutex_lock(&auth_id_lock); 210e48354ceSNicholas Bellinger conn->auth_id = iscsit_global->auth_id++; 211e48354ceSNicholas Bellinger mutex_unlock(&auth_id_lock); 212e48354ceSNicholas Bellinger } 213e48354ceSNicholas Bellinger 214e48354ceSNicholas Bellinger /* 215e48354ceSNicholas Bellinger * This is the leading connection of a new session, 216e48354ceSNicholas Bellinger * or session reinstatement. 217e48354ceSNicholas Bellinger */ 218e48354ceSNicholas Bellinger static int iscsi_login_zero_tsih_s1( 219e48354ceSNicholas Bellinger struct iscsi_conn *conn, 220e48354ceSNicholas Bellinger unsigned char *buf) 221e48354ceSNicholas Bellinger { 222e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL; 223e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 22413b5533aSBenjamin Wang int ret; 225e48354ceSNicholas Bellinger 226e48354ceSNicholas Bellinger sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); 227e48354ceSNicholas Bellinger if (!sess) { 228e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 229e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 230e48354ceSNicholas Bellinger pr_err("Could not allocate memory for session\n"); 2310957627aSNicholas Bellinger return -ENOMEM; 232e48354ceSNicholas Bellinger } 233e48354ceSNicholas Bellinger 234e48354ceSNicholas Bellinger iscsi_login_set_conn_values(sess, conn, pdu->cid); 235e48354ceSNicholas Bellinger sess->init_task_tag = pdu->itt; 2368359cf43SJörn Engel memcpy(&sess->isid, pdu->isid, 6); 237e48354ceSNicholas Bellinger sess->exp_cmd_sn = pdu->cmdsn; 238e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->sess_conn_list); 239e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); 240e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->cr_active_list); 241e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->cr_inactive_list); 242e48354ceSNicholas Bellinger init_completion(&sess->async_msg_comp); 243e48354ceSNicholas Bellinger init_completion(&sess->reinstatement_comp); 244e48354ceSNicholas Bellinger init_completion(&sess->session_wait_comp); 245e48354ceSNicholas Bellinger init_completion(&sess->session_waiting_on_uc_comp); 246e48354ceSNicholas Bellinger mutex_init(&sess->cmdsn_mutex); 247e48354ceSNicholas Bellinger spin_lock_init(&sess->conn_lock); 248e48354ceSNicholas Bellinger spin_lock_init(&sess->cr_a_lock); 249e48354ceSNicholas Bellinger spin_lock_init(&sess->cr_i_lock); 250e48354ceSNicholas Bellinger spin_lock_init(&sess->session_usage_lock); 251e48354ceSNicholas Bellinger spin_lock_init(&sess->ttt_lock); 252e48354ceSNicholas Bellinger 253e48354ceSNicholas Bellinger if (!idr_pre_get(&sess_idr, GFP_KERNEL)) { 254e48354ceSNicholas Bellinger pr_err("idr_pre_get() for sess_idr failed\n"); 255e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 256e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 2570957627aSNicholas Bellinger kfree(sess); 2580957627aSNicholas Bellinger return -ENOMEM; 259e48354ceSNicholas Bellinger } 260e48354ceSNicholas Bellinger spin_lock(&sess_idr_lock); 26113b5533aSBenjamin Wang ret = idr_get_new(&sess_idr, NULL, &sess->session_index); 262e48354ceSNicholas Bellinger spin_unlock(&sess_idr_lock); 263e48354ceSNicholas Bellinger 26413b5533aSBenjamin Wang if (ret < 0) { 26513b5533aSBenjamin Wang pr_err("idr_get_new() for sess_idr failed\n"); 26613b5533aSBenjamin Wang iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 26713b5533aSBenjamin Wang ISCSI_LOGIN_STATUS_NO_RESOURCES); 26813b5533aSBenjamin Wang kfree(sess); 26913b5533aSBenjamin Wang return -ENOMEM; 27013b5533aSBenjamin Wang } 27113b5533aSBenjamin Wang 272e48354ceSNicholas Bellinger sess->creation_time = get_jiffies_64(); 273e48354ceSNicholas Bellinger spin_lock_init(&sess->session_stats_lock); 274e48354ceSNicholas Bellinger /* 275e48354ceSNicholas Bellinger * The FFP CmdSN window values will be allocated from the TPG's 276e48354ceSNicholas Bellinger * Initiator Node's ACL once the login has been successfully completed. 277e48354ceSNicholas Bellinger */ 278e48354ceSNicholas Bellinger sess->max_cmd_sn = pdu->cmdsn; 279e48354ceSNicholas Bellinger 280e48354ceSNicholas Bellinger sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); 281e48354ceSNicholas Bellinger if (!sess->sess_ops) { 282e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 283e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 284e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 285e48354ceSNicholas Bellinger " struct iscsi_sess_ops.\n"); 2860957627aSNicholas Bellinger kfree(sess); 2870957627aSNicholas Bellinger return -ENOMEM; 288e48354ceSNicholas Bellinger } 289e48354ceSNicholas Bellinger 290e48354ceSNicholas Bellinger sess->se_sess = transport_init_session(); 2910957627aSNicholas Bellinger if (IS_ERR(sess->se_sess)) { 292e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 293e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 2940957627aSNicholas Bellinger kfree(sess); 2950957627aSNicholas Bellinger return -ENOMEM; 296e48354ceSNicholas Bellinger } 297e48354ceSNicholas Bellinger 298e48354ceSNicholas Bellinger return 0; 299e48354ceSNicholas Bellinger } 300e48354ceSNicholas Bellinger 301e48354ceSNicholas Bellinger static int iscsi_login_zero_tsih_s2( 302e48354ceSNicholas Bellinger struct iscsi_conn *conn) 303e48354ceSNicholas Bellinger { 304e48354ceSNicholas Bellinger struct iscsi_node_attrib *na; 305e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 306e48354ceSNicholas Bellinger unsigned char buf[32]; 307e48354ceSNicholas Bellinger 308e48354ceSNicholas Bellinger sess->tpg = conn->tpg; 309e48354ceSNicholas Bellinger 310e48354ceSNicholas Bellinger /* 311e48354ceSNicholas Bellinger * Assign a new TPG Session Handle. Note this is protected with 312e48354ceSNicholas Bellinger * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). 313e48354ceSNicholas Bellinger */ 314e48354ceSNicholas Bellinger sess->tsih = ++ISCSI_TPG_S(sess)->ntsih; 315e48354ceSNicholas Bellinger if (!sess->tsih) 316e48354ceSNicholas Bellinger sess->tsih = ++ISCSI_TPG_S(sess)->ntsih; 317e48354ceSNicholas Bellinger 318e48354ceSNicholas Bellinger /* 319e48354ceSNicholas Bellinger * Create the default params from user defined values.. 320e48354ceSNicholas Bellinger */ 321e48354ceSNicholas Bellinger if (iscsi_copy_param_list(&conn->param_list, 322e48354ceSNicholas Bellinger ISCSI_TPG_C(conn)->param_list, 1) < 0) { 323e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 324e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 325e48354ceSNicholas Bellinger return -1; 326e48354ceSNicholas Bellinger } 327e48354ceSNicholas Bellinger 328e48354ceSNicholas Bellinger iscsi_set_keys_to_negotiate(0, conn->param_list); 329e48354ceSNicholas Bellinger 330e48354ceSNicholas Bellinger if (sess->sess_ops->SessionType) 331e48354ceSNicholas Bellinger return iscsi_set_keys_irrelevant_for_discovery( 332e48354ceSNicholas Bellinger conn->param_list); 333e48354ceSNicholas Bellinger 334e48354ceSNicholas Bellinger na = iscsit_tpg_get_node_attrib(sess); 335e48354ceSNicholas Bellinger 336e48354ceSNicholas Bellinger /* 337e48354ceSNicholas Bellinger * Need to send TargetPortalGroupTag back in first login response 338e48354ceSNicholas Bellinger * on any iSCSI connection where the Initiator provides TargetName. 339e48354ceSNicholas Bellinger * See 5.3.1. Login Phase Start 340e48354ceSNicholas Bellinger * 341e48354ceSNicholas Bellinger * In our case, we have already located the struct iscsi_tiqn at this point. 342e48354ceSNicholas Bellinger */ 343e48354ceSNicholas Bellinger memset(buf, 0, 32); 344e48354ceSNicholas Bellinger sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt); 345e48354ceSNicholas Bellinger if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { 346e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 347e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 348e48354ceSNicholas Bellinger return -1; 349e48354ceSNicholas Bellinger } 350e48354ceSNicholas Bellinger 351e48354ceSNicholas Bellinger /* 352e48354ceSNicholas Bellinger * Workaround for Initiators that have broken connection recovery logic. 353e48354ceSNicholas Bellinger * 354e48354ceSNicholas Bellinger * "We would really like to get rid of this." Linux-iSCSI.org team 355e48354ceSNicholas Bellinger */ 356e48354ceSNicholas Bellinger memset(buf, 0, 32); 357e48354ceSNicholas Bellinger sprintf(buf, "ErrorRecoveryLevel=%d", na->default_erl); 358e48354ceSNicholas Bellinger if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { 359e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 360e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 361e48354ceSNicholas Bellinger return -1; 362e48354ceSNicholas Bellinger } 363e48354ceSNicholas Bellinger 364e48354ceSNicholas Bellinger if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0) 365e48354ceSNicholas Bellinger return -1; 366e48354ceSNicholas Bellinger 367e48354ceSNicholas Bellinger return 0; 368e48354ceSNicholas Bellinger } 369e48354ceSNicholas Bellinger 370e48354ceSNicholas Bellinger /* 371e48354ceSNicholas Bellinger * Remove PSTATE_NEGOTIATE for the four FIM related keys. 372e48354ceSNicholas Bellinger * The Initiator node will be able to enable FIM by proposing them itself. 373e48354ceSNicholas Bellinger */ 374e48354ceSNicholas Bellinger int iscsi_login_disable_FIM_keys( 375e48354ceSNicholas Bellinger struct iscsi_param_list *param_list, 376e48354ceSNicholas Bellinger struct iscsi_conn *conn) 377e48354ceSNicholas Bellinger { 378e48354ceSNicholas Bellinger struct iscsi_param *param; 379e48354ceSNicholas Bellinger 380e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("OFMarker", param_list); 381e48354ceSNicholas Bellinger if (!param) { 382e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 383e48354ceSNicholas Bellinger " OFMarker failed\n"); 384e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 385e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 386e48354ceSNicholas Bellinger return -1; 387e48354ceSNicholas Bellinger } 388e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 389e48354ceSNicholas Bellinger 390e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("OFMarkInt", param_list); 391e48354ceSNicholas Bellinger if (!param) { 392e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 393e48354ceSNicholas Bellinger " IFMarker failed\n"); 394e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 395e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 396e48354ceSNicholas Bellinger return -1; 397e48354ceSNicholas Bellinger } 398e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 399e48354ceSNicholas Bellinger 400e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("IFMarker", param_list); 401e48354ceSNicholas Bellinger if (!param) { 402e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 403e48354ceSNicholas Bellinger " IFMarker failed\n"); 404e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 405e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 406e48354ceSNicholas Bellinger return -1; 407e48354ceSNicholas Bellinger } 408e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 409e48354ceSNicholas Bellinger 410e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("IFMarkInt", param_list); 411e48354ceSNicholas Bellinger if (!param) { 412e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 413e48354ceSNicholas Bellinger " IFMarker failed\n"); 414e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 415e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 416e48354ceSNicholas Bellinger return -1; 417e48354ceSNicholas Bellinger } 418e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 419e48354ceSNicholas Bellinger 420e48354ceSNicholas Bellinger return 0; 421e48354ceSNicholas Bellinger } 422e48354ceSNicholas Bellinger 423e48354ceSNicholas Bellinger static int iscsi_login_non_zero_tsih_s1( 424e48354ceSNicholas Bellinger struct iscsi_conn *conn, 425e48354ceSNicholas Bellinger unsigned char *buf) 426e48354ceSNicholas Bellinger { 427e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 428e48354ceSNicholas Bellinger 429e48354ceSNicholas Bellinger iscsi_login_set_conn_values(NULL, conn, pdu->cid); 430e48354ceSNicholas Bellinger return 0; 431e48354ceSNicholas Bellinger } 432e48354ceSNicholas Bellinger 433e48354ceSNicholas Bellinger /* 434e48354ceSNicholas Bellinger * Add a new connection to an existing session. 435e48354ceSNicholas Bellinger */ 436e48354ceSNicholas Bellinger static int iscsi_login_non_zero_tsih_s2( 437e48354ceSNicholas Bellinger struct iscsi_conn *conn, 438e48354ceSNicholas Bellinger unsigned char *buf) 439e48354ceSNicholas Bellinger { 440e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->tpg; 441e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL, *sess_p = NULL; 442e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 443e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 444e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 445e48354ceSNicholas Bellinger 446e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 447e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 448e48354ceSNicholas Bellinger sess_list) { 449e48354ceSNicholas Bellinger 450e48354ceSNicholas Bellinger sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; 451e48354ceSNicholas Bellinger if (atomic_read(&sess_p->session_fall_back_to_erl0) || 452e48354ceSNicholas Bellinger atomic_read(&sess_p->session_logout) || 453e48354ceSNicholas Bellinger (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) 454e48354ceSNicholas Bellinger continue; 4558359cf43SJörn Engel if (!memcmp(sess_p->isid, pdu->isid, 6) && 456e48354ceSNicholas Bellinger (sess_p->tsih == pdu->tsih)) { 457e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess_p); 458e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess_p); 459e48354ceSNicholas Bellinger sess = sess_p; 460e48354ceSNicholas Bellinger break; 461e48354ceSNicholas Bellinger } 462e48354ceSNicholas Bellinger } 463e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 464e48354ceSNicholas Bellinger 465e48354ceSNicholas Bellinger /* 466e48354ceSNicholas Bellinger * If the Time2Retain handler has expired, the session is already gone. 467e48354ceSNicholas Bellinger */ 468e48354ceSNicholas Bellinger if (!sess) { 469e48354ceSNicholas Bellinger pr_err("Initiator attempting to add a connection to" 470e48354ceSNicholas Bellinger " a non-existent session, rejecting iSCSI Login.\n"); 471e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 472e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_SESSION); 473e48354ceSNicholas Bellinger return -1; 474e48354ceSNicholas Bellinger } 475e48354ceSNicholas Bellinger 476e48354ceSNicholas Bellinger /* 477e48354ceSNicholas Bellinger * Stop the Time2Retain timer if this is a failed session, we restart 478e48354ceSNicholas Bellinger * the timer if the login is not successful. 479e48354ceSNicholas Bellinger */ 480e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 481e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) 482e48354ceSNicholas Bellinger atomic_set(&sess->session_continuation, 1); 483e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 484e48354ceSNicholas Bellinger 485e48354ceSNicholas Bellinger iscsi_login_set_conn_values(sess, conn, pdu->cid); 486e48354ceSNicholas Bellinger 487e48354ceSNicholas Bellinger if (iscsi_copy_param_list(&conn->param_list, 488e48354ceSNicholas Bellinger ISCSI_TPG_C(conn)->param_list, 0) < 0) { 489e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 490e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 491e48354ceSNicholas Bellinger return -1; 492e48354ceSNicholas Bellinger } 493e48354ceSNicholas Bellinger 494e48354ceSNicholas Bellinger iscsi_set_keys_to_negotiate(0, conn->param_list); 495e48354ceSNicholas Bellinger /* 496e48354ceSNicholas Bellinger * Need to send TargetPortalGroupTag back in first login response 497e48354ceSNicholas Bellinger * on any iSCSI connection where the Initiator provides TargetName. 498e48354ceSNicholas Bellinger * See 5.3.1. Login Phase Start 499e48354ceSNicholas Bellinger * 500e48354ceSNicholas Bellinger * In our case, we have already located the struct iscsi_tiqn at this point. 501e48354ceSNicholas Bellinger */ 502e48354ceSNicholas Bellinger memset(buf, 0, 32); 503e48354ceSNicholas Bellinger sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt); 504e48354ceSNicholas Bellinger if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { 505e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 506e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 507e48354ceSNicholas Bellinger return -1; 508e48354ceSNicholas Bellinger } 509e48354ceSNicholas Bellinger 510e48354ceSNicholas Bellinger return iscsi_login_disable_FIM_keys(conn->param_list, conn); 511e48354ceSNicholas Bellinger } 512e48354ceSNicholas Bellinger 513e48354ceSNicholas Bellinger int iscsi_login_post_auth_non_zero_tsih( 514e48354ceSNicholas Bellinger struct iscsi_conn *conn, 515e48354ceSNicholas Bellinger u16 cid, 516e48354ceSNicholas Bellinger u32 exp_statsn) 517e48354ceSNicholas Bellinger { 518e48354ceSNicholas Bellinger struct iscsi_conn *conn_ptr = NULL; 519e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr = NULL; 520e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 521e48354ceSNicholas Bellinger 522e48354ceSNicholas Bellinger /* 523e48354ceSNicholas Bellinger * By following item 5 in the login table, if we have found 524e48354ceSNicholas Bellinger * an existing ISID and a valid/existing TSIH and an existing 525e48354ceSNicholas Bellinger * CID we do connection reinstatement. Currently we dont not 526e48354ceSNicholas Bellinger * support it so we send back an non-zero status class to the 527e48354ceSNicholas Bellinger * initiator and release the new connection. 528e48354ceSNicholas Bellinger */ 529e48354ceSNicholas Bellinger conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); 530ee1b1b9cSAndy Grover if (conn_ptr) { 531e48354ceSNicholas Bellinger pr_err("Connection exists with CID %hu for %s," 532e48354ceSNicholas Bellinger " performing connection reinstatement.\n", 533e48354ceSNicholas Bellinger conn_ptr->cid, sess->sess_ops->InitiatorName); 534e48354ceSNicholas Bellinger 535e48354ceSNicholas Bellinger iscsit_connection_reinstatement_rcfr(conn_ptr); 536e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_ptr); 537e48354ceSNicholas Bellinger } 538e48354ceSNicholas Bellinger 539e48354ceSNicholas Bellinger /* 540e48354ceSNicholas Bellinger * Check for any connection recovery entires containing CID. 541e48354ceSNicholas Bellinger * We use the original ExpStatSN sent in the first login request 542e48354ceSNicholas Bellinger * to acknowledge commands for the failed connection. 543e48354ceSNicholas Bellinger * 544e48354ceSNicholas Bellinger * Also note that an explict logout may have already been sent, 545e48354ceSNicholas Bellinger * but the response may not be sent due to additional connection 546e48354ceSNicholas Bellinger * loss. 547e48354ceSNicholas Bellinger */ 548e48354ceSNicholas Bellinger if (sess->sess_ops->ErrorRecoveryLevel == 2) { 549e48354ceSNicholas Bellinger cr = iscsit_get_inactive_connection_recovery_entry( 550e48354ceSNicholas Bellinger sess, cid); 551ee1b1b9cSAndy Grover if (cr) { 552e48354ceSNicholas Bellinger pr_debug("Performing implicit logout" 553e48354ceSNicholas Bellinger " for connection recovery on CID: %hu\n", 554e48354ceSNicholas Bellinger conn->cid); 555e48354ceSNicholas Bellinger iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); 556e48354ceSNicholas Bellinger } 557e48354ceSNicholas Bellinger } 558e48354ceSNicholas Bellinger 559e48354ceSNicholas Bellinger /* 560e48354ceSNicholas Bellinger * Else we follow item 4 from the login table in that we have 561e48354ceSNicholas Bellinger * found an existing ISID and a valid/existing TSIH and a new 562e48354ceSNicholas Bellinger * CID we go ahead and continue to add a new connection to the 563e48354ceSNicholas Bellinger * session. 564e48354ceSNicholas Bellinger */ 565e48354ceSNicholas Bellinger pr_debug("Adding CID %hu to existing session for %s.\n", 566e48354ceSNicholas Bellinger cid, sess->sess_ops->InitiatorName); 567e48354ceSNicholas Bellinger 568e48354ceSNicholas Bellinger if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { 569e48354ceSNicholas Bellinger pr_err("Adding additional connection to this session" 570e48354ceSNicholas Bellinger " would exceed MaxConnections %d, login failed.\n", 571e48354ceSNicholas Bellinger sess->sess_ops->MaxConnections); 572e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 573e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_ISID_ERROR); 574e48354ceSNicholas Bellinger return -1; 575e48354ceSNicholas Bellinger } 576e48354ceSNicholas Bellinger 577e48354ceSNicholas Bellinger return 0; 578e48354ceSNicholas Bellinger } 579e48354ceSNicholas Bellinger 580e48354ceSNicholas Bellinger static void iscsi_post_login_start_timers(struct iscsi_conn *conn) 581e48354ceSNicholas Bellinger { 582e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 583e48354ceSNicholas Bellinger 584e48354ceSNicholas Bellinger if (!sess->sess_ops->SessionType) 585e48354ceSNicholas Bellinger iscsit_start_nopin_timer(conn); 586e48354ceSNicholas Bellinger } 587e48354ceSNicholas Bellinger 588e48354ceSNicholas Bellinger static int iscsi_post_login_handler( 589e48354ceSNicholas Bellinger struct iscsi_np *np, 590e48354ceSNicholas Bellinger struct iscsi_conn *conn, 591e48354ceSNicholas Bellinger u8 zero_tsih) 592e48354ceSNicholas Bellinger { 593e48354ceSNicholas Bellinger int stop_timer = 0; 594e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 595e48354ceSNicholas Bellinger struct se_session *se_sess = sess->se_sess; 596e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess); 597e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 598e48354ceSNicholas Bellinger struct iscsi_thread_set *ts; 599e48354ceSNicholas Bellinger 600e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 601e48354ceSNicholas Bellinger 602e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, 603e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_ACCEPT); 604e48354ceSNicholas Bellinger 605e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); 606e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_LOGGED_IN; 607e48354ceSNicholas Bellinger 608e48354ceSNicholas Bellinger iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); 609e48354ceSNicholas Bellinger iscsit_set_sync_and_steering_values(conn); 610e48354ceSNicholas Bellinger /* 611e48354ceSNicholas Bellinger * SCSI Initiator -> SCSI Target Port Mapping 612e48354ceSNicholas Bellinger */ 613e48354ceSNicholas Bellinger ts = iscsi_get_thread_set(); 614e48354ceSNicholas Bellinger if (!zero_tsih) { 615e48354ceSNicholas Bellinger iscsi_set_session_parameters(sess->sess_ops, 616e48354ceSNicholas Bellinger conn->param_list, 0); 617e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 618e48354ceSNicholas Bellinger conn->param_list = NULL; 619e48354ceSNicholas Bellinger 620e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 621e48354ceSNicholas Bellinger atomic_set(&sess->session_continuation, 0); 622e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) { 623e48354ceSNicholas Bellinger pr_debug("Moving to" 624e48354ceSNicholas Bellinger " TARG_SESS_STATE_LOGGED_IN.\n"); 625e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_LOGGED_IN; 626e48354ceSNicholas Bellinger stop_timer = 1; 627e48354ceSNicholas Bellinger } 628e48354ceSNicholas Bellinger 629e48354ceSNicholas Bellinger pr_debug("iSCSI Login successful on CID: %hu from %s to" 6302f9bc894SNicholas Bellinger " %s:%hu,%hu\n", conn->cid, conn->login_ip, 6312f9bc894SNicholas Bellinger conn->local_ip, conn->local_port, tpg->tpgt); 632e48354ceSNicholas Bellinger 633e48354ceSNicholas Bellinger list_add_tail(&conn->conn_list, &sess->sess_conn_list); 634e48354ceSNicholas Bellinger atomic_inc(&sess->nconn); 635e48354ceSNicholas Bellinger pr_debug("Incremented iSCSI Connection count to %hu" 636e48354ceSNicholas Bellinger " from node: %s\n", atomic_read(&sess->nconn), 637e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 638e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 639e48354ceSNicholas Bellinger 640e48354ceSNicholas Bellinger iscsi_post_login_start_timers(conn); 641e48354ceSNicholas Bellinger iscsi_activate_thread_set(conn, ts); 642e48354ceSNicholas Bellinger /* 643e48354ceSNicholas Bellinger * Determine CPU mask to ensure connection's RX and TX kthreads 644e48354ceSNicholas Bellinger * are scheduled on the same CPU. 645e48354ceSNicholas Bellinger */ 646e48354ceSNicholas Bellinger iscsit_thread_get_cpumask(conn); 647e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 1; 648e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 1; 649e48354ceSNicholas Bellinger 650e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 651e48354ceSNicholas Bellinger if (stop_timer) { 652e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 653e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess); 654e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 655e48354ceSNicholas Bellinger } 656e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 657e48354ceSNicholas Bellinger return 0; 658e48354ceSNicholas Bellinger } 659e48354ceSNicholas Bellinger 660e48354ceSNicholas Bellinger iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); 661e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 662e48354ceSNicholas Bellinger conn->param_list = NULL; 663e48354ceSNicholas Bellinger 664e48354ceSNicholas Bellinger iscsit_determine_maxcmdsn(sess); 665e48354ceSNicholas Bellinger 666e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 667e48354ceSNicholas Bellinger __transport_register_session(&sess->tpg->tpg_se_tpg, 6688359cf43SJörn Engel se_sess->se_node_acl, se_sess, sess); 669e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); 670e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_LOGGED_IN; 671e48354ceSNicholas Bellinger 672e48354ceSNicholas Bellinger pr_debug("iSCSI Login successful on CID: %hu from %s to %s:%hu,%hu\n", 6732f9bc894SNicholas Bellinger conn->cid, conn->login_ip, conn->local_ip, conn->local_port, 6742f9bc894SNicholas Bellinger tpg->tpgt); 675e48354ceSNicholas Bellinger 676e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 677e48354ceSNicholas Bellinger list_add_tail(&conn->conn_list, &sess->sess_conn_list); 678e48354ceSNicholas Bellinger atomic_inc(&sess->nconn); 679e48354ceSNicholas Bellinger pr_debug("Incremented iSCSI Connection count to %hu from node:" 680e48354ceSNicholas Bellinger " %s\n", atomic_read(&sess->nconn), 681e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 682e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 683e48354ceSNicholas Bellinger 684e48354ceSNicholas Bellinger sess->sid = tpg->sid++; 685e48354ceSNicholas Bellinger if (!sess->sid) 686e48354ceSNicholas Bellinger sess->sid = tpg->sid++; 687e48354ceSNicholas Bellinger pr_debug("Established iSCSI session from node: %s\n", 688e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 689e48354ceSNicholas Bellinger 690e48354ceSNicholas Bellinger tpg->nsessions++; 691e48354ceSNicholas Bellinger if (tpg->tpg_tiqn) 692e48354ceSNicholas Bellinger tpg->tpg_tiqn->tiqn_nsessions++; 693e48354ceSNicholas Bellinger 694e48354ceSNicholas Bellinger pr_debug("Incremented number of active iSCSI sessions to %u on" 695e48354ceSNicholas Bellinger " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); 696e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 697e48354ceSNicholas Bellinger 698e48354ceSNicholas Bellinger iscsi_post_login_start_timers(conn); 699e48354ceSNicholas Bellinger iscsi_activate_thread_set(conn, ts); 700e48354ceSNicholas Bellinger /* 701e48354ceSNicholas Bellinger * Determine CPU mask to ensure connection's RX and TX kthreads 702e48354ceSNicholas Bellinger * are scheduled on the same CPU. 703e48354ceSNicholas Bellinger */ 704e48354ceSNicholas Bellinger iscsit_thread_get_cpumask(conn); 705e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 1; 706e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 1; 707e48354ceSNicholas Bellinger 708e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 709e48354ceSNicholas Bellinger 710e48354ceSNicholas Bellinger return 0; 711e48354ceSNicholas Bellinger } 712e48354ceSNicholas Bellinger 713e48354ceSNicholas Bellinger static void iscsi_handle_login_thread_timeout(unsigned long data) 714e48354ceSNicholas Bellinger { 715e48354ceSNicholas Bellinger struct iscsi_np *np = (struct iscsi_np *) data; 716e48354ceSNicholas Bellinger 717e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 718e48354ceSNicholas Bellinger pr_err("iSCSI Login timeout on Network Portal %s:%hu\n", 719e48354ceSNicholas Bellinger np->np_ip, np->np_port); 720e48354ceSNicholas Bellinger 721e48354ceSNicholas Bellinger if (np->np_login_timer_flags & ISCSI_TF_STOP) { 722e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 723e48354ceSNicholas Bellinger return; 724e48354ceSNicholas Bellinger } 725e48354ceSNicholas Bellinger 726e48354ceSNicholas Bellinger if (np->np_thread) 727e48354ceSNicholas Bellinger send_sig(SIGINT, np->np_thread, 1); 728e48354ceSNicholas Bellinger 729e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; 730e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 731e48354ceSNicholas Bellinger } 732e48354ceSNicholas Bellinger 733e48354ceSNicholas Bellinger static void iscsi_start_login_thread_timer(struct iscsi_np *np) 734e48354ceSNicholas Bellinger { 735e48354ceSNicholas Bellinger /* 736e48354ceSNicholas Bellinger * This used the TA_LOGIN_TIMEOUT constant because at this 737e48354ceSNicholas Bellinger * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout 738e48354ceSNicholas Bellinger */ 739e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 740e48354ceSNicholas Bellinger init_timer(&np->np_login_timer); 741e48354ceSNicholas Bellinger np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ); 742e48354ceSNicholas Bellinger np->np_login_timer.data = (unsigned long)np; 743e48354ceSNicholas Bellinger np->np_login_timer.function = iscsi_handle_login_thread_timeout; 744e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_STOP; 745e48354ceSNicholas Bellinger np->np_login_timer_flags |= ISCSI_TF_RUNNING; 746e48354ceSNicholas Bellinger add_timer(&np->np_login_timer); 747e48354ceSNicholas Bellinger 748e48354ceSNicholas Bellinger pr_debug("Added timeout timer to iSCSI login request for" 749e48354ceSNicholas Bellinger " %u seconds.\n", TA_LOGIN_TIMEOUT); 750e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 751e48354ceSNicholas Bellinger } 752e48354ceSNicholas Bellinger 753e48354ceSNicholas Bellinger static void iscsi_stop_login_thread_timer(struct iscsi_np *np) 754e48354ceSNicholas Bellinger { 755e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 756e48354ceSNicholas Bellinger if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { 757e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 758e48354ceSNicholas Bellinger return; 759e48354ceSNicholas Bellinger } 760e48354ceSNicholas Bellinger np->np_login_timer_flags |= ISCSI_TF_STOP; 761e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 762e48354ceSNicholas Bellinger 763e48354ceSNicholas Bellinger del_timer_sync(&np->np_login_timer); 764e48354ceSNicholas Bellinger 765e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 766e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; 767e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 768e48354ceSNicholas Bellinger } 769e48354ceSNicholas Bellinger 770e48354ceSNicholas Bellinger int iscsi_target_setup_login_socket( 771e48354ceSNicholas Bellinger struct iscsi_np *np, 772e48354ceSNicholas Bellinger struct __kernel_sockaddr_storage *sockaddr) 773e48354ceSNicholas Bellinger { 774e48354ceSNicholas Bellinger struct socket *sock; 775e48354ceSNicholas Bellinger int backlog = 5, ret, opt = 0, len; 776e48354ceSNicholas Bellinger 777e48354ceSNicholas Bellinger switch (np->np_network_transport) { 778e48354ceSNicholas Bellinger case ISCSI_TCP: 779e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_TCP; 780e48354ceSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 781e48354ceSNicholas Bellinger break; 782e48354ceSNicholas Bellinger case ISCSI_SCTP_TCP: 783e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_SCTP; 784e48354ceSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 785e48354ceSNicholas Bellinger break; 786e48354ceSNicholas Bellinger case ISCSI_SCTP_UDP: 787e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_SCTP; 788e48354ceSNicholas Bellinger np->np_sock_type = SOCK_SEQPACKET; 789e48354ceSNicholas Bellinger break; 790e48354ceSNicholas Bellinger case ISCSI_IWARP_TCP: 791e48354ceSNicholas Bellinger case ISCSI_IWARP_SCTP: 792e48354ceSNicholas Bellinger case ISCSI_INFINIBAND: 793e48354ceSNicholas Bellinger default: 794e48354ceSNicholas Bellinger pr_err("Unsupported network_transport: %d\n", 795e48354ceSNicholas Bellinger np->np_network_transport); 796e48354ceSNicholas Bellinger return -EINVAL; 797e48354ceSNicholas Bellinger } 798e48354ceSNicholas Bellinger 799e48354ceSNicholas Bellinger ret = sock_create(sockaddr->ss_family, np->np_sock_type, 800e48354ceSNicholas Bellinger np->np_ip_proto, &sock); 801e48354ceSNicholas Bellinger if (ret < 0) { 802e48354ceSNicholas Bellinger pr_err("sock_create() failed.\n"); 803e48354ceSNicholas Bellinger return ret; 804e48354ceSNicholas Bellinger } 805e48354ceSNicholas Bellinger np->np_socket = sock; 806e48354ceSNicholas Bellinger /* 807e48354ceSNicholas Bellinger * Setup the np->np_sockaddr from the passed sockaddr setup 808e48354ceSNicholas Bellinger * in iscsi_target_configfs.c code.. 809e48354ceSNicholas Bellinger */ 8108359cf43SJörn Engel memcpy(&np->np_sockaddr, sockaddr, 811e48354ceSNicholas Bellinger sizeof(struct __kernel_sockaddr_storage)); 812e48354ceSNicholas Bellinger 813e48354ceSNicholas Bellinger if (sockaddr->ss_family == AF_INET6) 814e48354ceSNicholas Bellinger len = sizeof(struct sockaddr_in6); 815e48354ceSNicholas Bellinger else 816e48354ceSNicholas Bellinger len = sizeof(struct sockaddr_in); 817e48354ceSNicholas Bellinger /* 818e48354ceSNicholas Bellinger * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. 819e48354ceSNicholas Bellinger */ 8208359cf43SJörn Engel /* FIXME: Someone please explain why this is endian-safe */ 821e48354ceSNicholas Bellinger opt = 1; 822e48354ceSNicholas Bellinger if (np->np_network_transport == ISCSI_TCP) { 823e48354ceSNicholas Bellinger ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, 824e48354ceSNicholas Bellinger (char *)&opt, sizeof(opt)); 825e48354ceSNicholas Bellinger if (ret < 0) { 826e48354ceSNicholas Bellinger pr_err("kernel_setsockopt() for TCP_NODELAY" 827e48354ceSNicholas Bellinger " failed: %d\n", ret); 828e48354ceSNicholas Bellinger goto fail; 829e48354ceSNicholas Bellinger } 830e48354ceSNicholas Bellinger } 831e48354ceSNicholas Bellinger 8328359cf43SJörn Engel /* FIXME: Someone please explain why this is endian-safe */ 833e48354ceSNicholas Bellinger ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, 834e48354ceSNicholas Bellinger (char *)&opt, sizeof(opt)); 835e48354ceSNicholas Bellinger if (ret < 0) { 836e48354ceSNicholas Bellinger pr_err("kernel_setsockopt() for SO_REUSEADDR" 837e48354ceSNicholas Bellinger " failed\n"); 838e48354ceSNicholas Bellinger goto fail; 839e48354ceSNicholas Bellinger } 840e48354ceSNicholas Bellinger 8419f9ef6d3SDax Kelson ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, 8429f9ef6d3SDax Kelson (char *)&opt, sizeof(opt)); 8439f9ef6d3SDax Kelson if (ret < 0) { 8449f9ef6d3SDax Kelson pr_err("kernel_setsockopt() for IP_FREEBIND" 8459f9ef6d3SDax Kelson " failed\n"); 8469f9ef6d3SDax Kelson goto fail; 8479f9ef6d3SDax Kelson } 8489f9ef6d3SDax Kelson 849e48354ceSNicholas Bellinger ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); 850e48354ceSNicholas Bellinger if (ret < 0) { 851e48354ceSNicholas Bellinger pr_err("kernel_bind() failed: %d\n", ret); 852e48354ceSNicholas Bellinger goto fail; 853e48354ceSNicholas Bellinger } 854e48354ceSNicholas Bellinger 855e48354ceSNicholas Bellinger ret = kernel_listen(sock, backlog); 856e48354ceSNicholas Bellinger if (ret != 0) { 857e48354ceSNicholas Bellinger pr_err("kernel_listen() failed: %d\n", ret); 858e48354ceSNicholas Bellinger goto fail; 859e48354ceSNicholas Bellinger } 860e48354ceSNicholas Bellinger 861e48354ceSNicholas Bellinger return 0; 862e48354ceSNicholas Bellinger 863e48354ceSNicholas Bellinger fail: 864e48354ceSNicholas Bellinger np->np_socket = NULL; 865bf6932f4SAl Viro if (sock) 866e48354ceSNicholas Bellinger sock_release(sock); 867e48354ceSNicholas Bellinger return ret; 868e48354ceSNicholas Bellinger } 869e48354ceSNicholas Bellinger 870e48354ceSNicholas Bellinger static int __iscsi_target_login_thread(struct iscsi_np *np) 871e48354ceSNicholas Bellinger { 872e48354ceSNicholas Bellinger u8 buffer[ISCSI_HDR_LEN], iscsi_opcode, zero_tsih = 0; 873bf6932f4SAl Viro int err, ret = 0, stop; 874e48354ceSNicholas Bellinger struct iscsi_conn *conn = NULL; 875e48354ceSNicholas Bellinger struct iscsi_login *login; 876e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = NULL; 877e48354ceSNicholas Bellinger struct socket *new_sock, *sock; 878e48354ceSNicholas Bellinger struct kvec iov; 879e48354ceSNicholas Bellinger struct iscsi_login_req *pdu; 880e48354ceSNicholas Bellinger struct sockaddr_in sock_in; 881e48354ceSNicholas Bellinger struct sockaddr_in6 sock_in6; 882e48354ceSNicholas Bellinger 883e48354ceSNicholas Bellinger flush_signals(current); 884e48354ceSNicholas Bellinger sock = np->np_socket; 885e48354ceSNicholas Bellinger 886e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 887e48354ceSNicholas Bellinger if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { 888e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 889e48354ceSNicholas Bellinger complete(&np->np_restart_comp); 890e48354ceSNicholas Bellinger } else { 891e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 892e48354ceSNicholas Bellinger } 893e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 894e48354ceSNicholas Bellinger 895e48354ceSNicholas Bellinger if (kernel_accept(sock, &new_sock, 0) < 0) { 896e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 897e48354ceSNicholas Bellinger if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { 898e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 899e48354ceSNicholas Bellinger complete(&np->np_restart_comp); 900e48354ceSNicholas Bellinger /* Get another socket */ 901e48354ceSNicholas Bellinger return 1; 902e48354ceSNicholas Bellinger } 903e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 904e48354ceSNicholas Bellinger goto out; 905e48354ceSNicholas Bellinger } 906e48354ceSNicholas Bellinger iscsi_start_login_thread_timer(np); 907e48354ceSNicholas Bellinger 908e48354ceSNicholas Bellinger conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); 909e48354ceSNicholas Bellinger if (!conn) { 910e48354ceSNicholas Bellinger pr_err("Could not allocate memory for" 911e48354ceSNicholas Bellinger " new connection\n"); 912e48354ceSNicholas Bellinger sock_release(new_sock); 913e48354ceSNicholas Bellinger /* Get another socket */ 914e48354ceSNicholas Bellinger return 1; 915e48354ceSNicholas Bellinger } 916e48354ceSNicholas Bellinger 917e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); 918e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_FREE; 919e48354ceSNicholas Bellinger conn->sock = new_sock; 920e48354ceSNicholas Bellinger 921e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); 922e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_XPT_UP; 923e48354ceSNicholas Bellinger 924e48354ceSNicholas Bellinger /* 925e48354ceSNicholas Bellinger * Allocate conn->conn_ops early as a failure calling 926e48354ceSNicholas Bellinger * iscsit_tx_login_rsp() below will call tx_data(). 927e48354ceSNicholas Bellinger */ 928e48354ceSNicholas Bellinger conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL); 929e48354ceSNicholas Bellinger if (!conn->conn_ops) { 930e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 931e48354ceSNicholas Bellinger " struct iscsi_conn_ops.\n"); 932e48354ceSNicholas Bellinger goto new_sess_out; 933e48354ceSNicholas Bellinger } 934e48354ceSNicholas Bellinger /* 935e48354ceSNicholas Bellinger * Perform the remaining iSCSI connection initialization items.. 936e48354ceSNicholas Bellinger */ 937e48354ceSNicholas Bellinger if (iscsi_login_init_conn(conn) < 0) 938e48354ceSNicholas Bellinger goto new_sess_out; 939e48354ceSNicholas Bellinger 940e48354ceSNicholas Bellinger memset(buffer, 0, ISCSI_HDR_LEN); 941e48354ceSNicholas Bellinger memset(&iov, 0, sizeof(struct kvec)); 942e48354ceSNicholas Bellinger iov.iov_base = buffer; 943e48354ceSNicholas Bellinger iov.iov_len = ISCSI_HDR_LEN; 944e48354ceSNicholas Bellinger 945e48354ceSNicholas Bellinger if (rx_data(conn, &iov, 1, ISCSI_HDR_LEN) <= 0) { 946e48354ceSNicholas Bellinger pr_err("rx_data() returned an error.\n"); 947e48354ceSNicholas Bellinger goto new_sess_out; 948e48354ceSNicholas Bellinger } 949e48354ceSNicholas Bellinger 950e48354ceSNicholas Bellinger iscsi_opcode = (buffer[0] & ISCSI_OPCODE_MASK); 951e48354ceSNicholas Bellinger if (!(iscsi_opcode & ISCSI_OP_LOGIN)) { 952e48354ceSNicholas Bellinger pr_err("First opcode is not login request," 953e48354ceSNicholas Bellinger " failing login request.\n"); 954e48354ceSNicholas Bellinger goto new_sess_out; 955e48354ceSNicholas Bellinger } 956e48354ceSNicholas Bellinger 957e48354ceSNicholas Bellinger pdu = (struct iscsi_login_req *) buffer; 958e48354ceSNicholas Bellinger pdu->cid = be16_to_cpu(pdu->cid); 959e48354ceSNicholas Bellinger pdu->tsih = be16_to_cpu(pdu->tsih); 960e48354ceSNicholas Bellinger pdu->itt = be32_to_cpu(pdu->itt); 961e48354ceSNicholas Bellinger pdu->cmdsn = be32_to_cpu(pdu->cmdsn); 962e48354ceSNicholas Bellinger pdu->exp_statsn = be32_to_cpu(pdu->exp_statsn); 963e48354ceSNicholas Bellinger /* 964e48354ceSNicholas Bellinger * Used by iscsit_tx_login_rsp() for Login Resonses PDUs 965e48354ceSNicholas Bellinger * when Status-Class != 0. 966e48354ceSNicholas Bellinger */ 967e48354ceSNicholas Bellinger conn->login_itt = pdu->itt; 968e48354ceSNicholas Bellinger 969e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 970e48354ceSNicholas Bellinger if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { 971e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 972e48354ceSNicholas Bellinger pr_err("iSCSI Network Portal on %s:%hu currently not" 973e48354ceSNicholas Bellinger " active.\n", np->np_ip, np->np_port); 974e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 975e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); 976e48354ceSNicholas Bellinger goto new_sess_out; 977e48354ceSNicholas Bellinger } 978e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 979e48354ceSNicholas Bellinger 980e48354ceSNicholas Bellinger if (np->np_sockaddr.ss_family == AF_INET6) { 981e48354ceSNicholas Bellinger memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); 982e48354ceSNicholas Bellinger 983e48354ceSNicholas Bellinger if (conn->sock->ops->getname(conn->sock, 984e48354ceSNicholas Bellinger (struct sockaddr *)&sock_in6, &err, 1) < 0) { 985e48354ceSNicholas Bellinger pr_err("sock_ops->getname() failed.\n"); 986e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 987e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_TARGET_ERROR); 988e48354ceSNicholas Bellinger goto new_sess_out; 989e48354ceSNicholas Bellinger } 9906626a057SChris Boot snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c", 9916626a057SChris Boot &sock_in6.sin6_addr.in6_u); 9926626a057SChris Boot conn->login_port = ntohs(sock_in6.sin6_port); 9932f9bc894SNicholas Bellinger 9942f9bc894SNicholas Bellinger if (conn->sock->ops->getname(conn->sock, 9952f9bc894SNicholas Bellinger (struct sockaddr *)&sock_in6, &err, 0) < 0) { 9962f9bc894SNicholas Bellinger pr_err("sock_ops->getname() failed.\n"); 9972f9bc894SNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 9982f9bc894SNicholas Bellinger ISCSI_LOGIN_STATUS_TARGET_ERROR); 9992f9bc894SNicholas Bellinger goto new_sess_out; 10002f9bc894SNicholas Bellinger } 10012f9bc894SNicholas Bellinger snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c", 10022f9bc894SNicholas Bellinger &sock_in6.sin6_addr.in6_u); 10032f9bc894SNicholas Bellinger conn->local_port = ntohs(sock_in6.sin6_port); 10042f9bc894SNicholas Bellinger 1005e48354ceSNicholas Bellinger } else { 1006e48354ceSNicholas Bellinger memset(&sock_in, 0, sizeof(struct sockaddr_in)); 1007e48354ceSNicholas Bellinger 1008e48354ceSNicholas Bellinger if (conn->sock->ops->getname(conn->sock, 1009e48354ceSNicholas Bellinger (struct sockaddr *)&sock_in, &err, 1) < 0) { 1010e48354ceSNicholas Bellinger pr_err("sock_ops->getname() failed.\n"); 1011e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 1012e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_TARGET_ERROR); 1013e48354ceSNicholas Bellinger goto new_sess_out; 1014e48354ceSNicholas Bellinger } 1015e48354ceSNicholas Bellinger sprintf(conn->login_ip, "%pI4", &sock_in.sin_addr.s_addr); 1016e48354ceSNicholas Bellinger conn->login_port = ntohs(sock_in.sin_port); 10172f9bc894SNicholas Bellinger 10182f9bc894SNicholas Bellinger if (conn->sock->ops->getname(conn->sock, 10192f9bc894SNicholas Bellinger (struct sockaddr *)&sock_in, &err, 0) < 0) { 10202f9bc894SNicholas Bellinger pr_err("sock_ops->getname() failed.\n"); 10212f9bc894SNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 10222f9bc894SNicholas Bellinger ISCSI_LOGIN_STATUS_TARGET_ERROR); 10232f9bc894SNicholas Bellinger goto new_sess_out; 10242f9bc894SNicholas Bellinger } 10252f9bc894SNicholas Bellinger sprintf(conn->local_ip, "%pI4", &sock_in.sin_addr.s_addr); 10262f9bc894SNicholas Bellinger conn->local_port = ntohs(sock_in.sin_port); 1027e48354ceSNicholas Bellinger } 1028e48354ceSNicholas Bellinger 1029e48354ceSNicholas Bellinger conn->network_transport = np->np_network_transport; 1030e48354ceSNicholas Bellinger 1031e48354ceSNicholas Bellinger pr_debug("Received iSCSI login request from %s on %s Network" 1032e48354ceSNicholas Bellinger " Portal %s:%hu\n", conn->login_ip, 1033e48354ceSNicholas Bellinger (conn->network_transport == ISCSI_TCP) ? "TCP" : "SCTP", 10342f9bc894SNicholas Bellinger conn->local_ip, conn->local_port); 1035e48354ceSNicholas Bellinger 1036e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); 1037e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_IN_LOGIN; 1038e48354ceSNicholas Bellinger 1039e48354ceSNicholas Bellinger if (iscsi_login_check_initiator_version(conn, pdu->max_version, 1040e48354ceSNicholas Bellinger pdu->min_version) < 0) 1041e48354ceSNicholas Bellinger goto new_sess_out; 1042e48354ceSNicholas Bellinger 1043e48354ceSNicholas Bellinger zero_tsih = (pdu->tsih == 0x0000); 1044ee1b1b9cSAndy Grover if (zero_tsih) { 1045e48354ceSNicholas Bellinger /* 1046e48354ceSNicholas Bellinger * This is the leading connection of a new session. 1047e48354ceSNicholas Bellinger * We wait until after authentication to check for 1048e48354ceSNicholas Bellinger * session reinstatement. 1049e48354ceSNicholas Bellinger */ 1050e48354ceSNicholas Bellinger if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) 1051e48354ceSNicholas Bellinger goto new_sess_out; 1052e48354ceSNicholas Bellinger } else { 1053e48354ceSNicholas Bellinger /* 1054e48354ceSNicholas Bellinger * Add a new connection to an existing session. 1055e48354ceSNicholas Bellinger * We check for a non-existant session in 1056e48354ceSNicholas Bellinger * iscsi_login_non_zero_tsih_s2() below based 1057e48354ceSNicholas Bellinger * on ISID/TSIH, but wait until after authentication 1058e48354ceSNicholas Bellinger * to check for connection reinstatement, etc. 1059e48354ceSNicholas Bellinger */ 1060e48354ceSNicholas Bellinger if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) 1061e48354ceSNicholas Bellinger goto new_sess_out; 1062e48354ceSNicholas Bellinger } 1063e48354ceSNicholas Bellinger 1064e48354ceSNicholas Bellinger /* 1065e48354ceSNicholas Bellinger * This will process the first login request, and call 1066e48354ceSNicholas Bellinger * iscsi_target_locate_portal(), and return a valid struct iscsi_login. 1067e48354ceSNicholas Bellinger */ 1068e48354ceSNicholas Bellinger login = iscsi_target_init_negotiation(np, conn, buffer); 1069e48354ceSNicholas Bellinger if (!login) { 1070e48354ceSNicholas Bellinger tpg = conn->tpg; 1071e48354ceSNicholas Bellinger goto new_sess_out; 1072e48354ceSNicholas Bellinger } 1073e48354ceSNicholas Bellinger 1074e48354ceSNicholas Bellinger tpg = conn->tpg; 1075e48354ceSNicholas Bellinger if (!tpg) { 1076e48354ceSNicholas Bellinger pr_err("Unable to locate struct iscsi_conn->tpg\n"); 1077e48354ceSNicholas Bellinger goto new_sess_out; 1078e48354ceSNicholas Bellinger } 1079e48354ceSNicholas Bellinger 1080e48354ceSNicholas Bellinger if (zero_tsih) { 1081e48354ceSNicholas Bellinger if (iscsi_login_zero_tsih_s2(conn) < 0) { 1082e48354ceSNicholas Bellinger iscsi_target_nego_release(login, conn); 1083e48354ceSNicholas Bellinger goto new_sess_out; 1084e48354ceSNicholas Bellinger } 1085e48354ceSNicholas Bellinger } else { 1086e48354ceSNicholas Bellinger if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) { 1087e48354ceSNicholas Bellinger iscsi_target_nego_release(login, conn); 1088e48354ceSNicholas Bellinger goto old_sess_out; 1089e48354ceSNicholas Bellinger } 1090e48354ceSNicholas Bellinger } 1091e48354ceSNicholas Bellinger 1092e48354ceSNicholas Bellinger if (iscsi_target_start_negotiation(login, conn) < 0) 1093e48354ceSNicholas Bellinger goto new_sess_out; 1094e48354ceSNicholas Bellinger 1095e48354ceSNicholas Bellinger if (!conn->sess) { 1096e48354ceSNicholas Bellinger pr_err("struct iscsi_conn session pointer is NULL!\n"); 1097e48354ceSNicholas Bellinger goto new_sess_out; 1098e48354ceSNicholas Bellinger } 1099e48354ceSNicholas Bellinger 1100e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1101e48354ceSNicholas Bellinger 1102e48354ceSNicholas Bellinger if (signal_pending(current)) 1103e48354ceSNicholas Bellinger goto new_sess_out; 1104e48354ceSNicholas Bellinger 1105e48354ceSNicholas Bellinger ret = iscsi_post_login_handler(np, conn, zero_tsih); 1106e48354ceSNicholas Bellinger 1107e48354ceSNicholas Bellinger if (ret < 0) 1108e48354ceSNicholas Bellinger goto new_sess_out; 1109e48354ceSNicholas Bellinger 1110e48354ceSNicholas Bellinger iscsit_deaccess_np(np, tpg); 1111e48354ceSNicholas Bellinger tpg = NULL; 1112e48354ceSNicholas Bellinger /* Get another socket */ 1113e48354ceSNicholas Bellinger return 1; 1114e48354ceSNicholas Bellinger 1115e48354ceSNicholas Bellinger new_sess_out: 1116e48354ceSNicholas Bellinger pr_err("iSCSI Login negotiation failed.\n"); 1117e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1118e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_INIT_ERR); 1119e48354ceSNicholas Bellinger if (!zero_tsih || !conn->sess) 1120e48354ceSNicholas Bellinger goto old_sess_out; 1121e48354ceSNicholas Bellinger if (conn->sess->se_sess) 1122e48354ceSNicholas Bellinger transport_free_session(conn->sess->se_sess); 1123e48354ceSNicholas Bellinger if (conn->sess->session_index != 0) { 1124e48354ceSNicholas Bellinger spin_lock_bh(&sess_idr_lock); 1125e48354ceSNicholas Bellinger idr_remove(&sess_idr, conn->sess->session_index); 1126e48354ceSNicholas Bellinger spin_unlock_bh(&sess_idr_lock); 1127e48354ceSNicholas Bellinger } 1128e48354ceSNicholas Bellinger if (conn->sess->sess_ops) 1129e48354ceSNicholas Bellinger kfree(conn->sess->sess_ops); 1130e48354ceSNicholas Bellinger if (conn->sess) 1131e48354ceSNicholas Bellinger kfree(conn->sess); 1132e48354ceSNicholas Bellinger old_sess_out: 1133e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1134e48354ceSNicholas Bellinger /* 1135e48354ceSNicholas Bellinger * If login negotiation fails check if the Time2Retain timer 1136e48354ceSNicholas Bellinger * needs to be restarted. 1137e48354ceSNicholas Bellinger */ 1138e48354ceSNicholas Bellinger if (!zero_tsih && conn->sess) { 1139e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->conn_lock); 1140e48354ceSNicholas Bellinger if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { 1141e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = 1142e48354ceSNicholas Bellinger &ISCSI_TPG_C(conn)->tpg_se_tpg; 1143e48354ceSNicholas Bellinger 1144e48354ceSNicholas Bellinger atomic_set(&conn->sess->session_continuation, 0); 1145e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->conn_lock); 1146e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 1147e48354ceSNicholas Bellinger iscsit_start_time2retain_handler(conn->sess); 1148e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 1149e48354ceSNicholas Bellinger } else 1150e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->conn_lock); 1151e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(conn->sess); 1152e48354ceSNicholas Bellinger } 1153e48354ceSNicholas Bellinger 1154e48354ceSNicholas Bellinger if (!IS_ERR(conn->conn_rx_hash.tfm)) 1155e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_rx_hash.tfm); 1156e48354ceSNicholas Bellinger if (!IS_ERR(conn->conn_tx_hash.tfm)) 1157e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_tx_hash.tfm); 1158e48354ceSNicholas Bellinger 1159e48354ceSNicholas Bellinger if (conn->conn_cpumask) 1160e48354ceSNicholas Bellinger free_cpumask_var(conn->conn_cpumask); 1161e48354ceSNicholas Bellinger 1162e48354ceSNicholas Bellinger kfree(conn->conn_ops); 1163e48354ceSNicholas Bellinger 1164e48354ceSNicholas Bellinger if (conn->param_list) { 1165e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 1166e48354ceSNicholas Bellinger conn->param_list = NULL; 1167e48354ceSNicholas Bellinger } 1168bf6932f4SAl Viro if (conn->sock) 1169e48354ceSNicholas Bellinger sock_release(conn->sock); 1170e48354ceSNicholas Bellinger kfree(conn); 1171e48354ceSNicholas Bellinger 1172e48354ceSNicholas Bellinger if (tpg) { 1173e48354ceSNicholas Bellinger iscsit_deaccess_np(np, tpg); 1174e48354ceSNicholas Bellinger tpg = NULL; 1175e48354ceSNicholas Bellinger } 1176e48354ceSNicholas Bellinger 1177e48354ceSNicholas Bellinger out: 1178e48354ceSNicholas Bellinger stop = kthread_should_stop(); 1179e48354ceSNicholas Bellinger if (!stop && signal_pending(current)) { 1180e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1181e48354ceSNicholas Bellinger stop = (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN); 1182e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1183e48354ceSNicholas Bellinger } 1184e48354ceSNicholas Bellinger /* Wait for another socket.. */ 1185e48354ceSNicholas Bellinger if (!stop) 1186e48354ceSNicholas Bellinger return 1; 1187e48354ceSNicholas Bellinger 1188e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1189e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1190e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_EXIT; 1191e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1192e48354ceSNicholas Bellinger return 0; 1193e48354ceSNicholas Bellinger } 1194e48354ceSNicholas Bellinger 1195e48354ceSNicholas Bellinger int iscsi_target_login_thread(void *arg) 1196e48354ceSNicholas Bellinger { 11978359cf43SJörn Engel struct iscsi_np *np = arg; 1198e48354ceSNicholas Bellinger int ret; 1199e48354ceSNicholas Bellinger 1200e48354ceSNicholas Bellinger allow_signal(SIGINT); 1201e48354ceSNicholas Bellinger 1202e48354ceSNicholas Bellinger while (!kthread_should_stop()) { 1203e48354ceSNicholas Bellinger ret = __iscsi_target_login_thread(np); 1204e48354ceSNicholas Bellinger /* 1205e48354ceSNicholas Bellinger * We break and exit here unless another sock_accept() call 1206e48354ceSNicholas Bellinger * is expected. 1207e48354ceSNicholas Bellinger */ 1208e48354ceSNicholas Bellinger if (ret != 1) 1209e48354ceSNicholas Bellinger break; 1210e48354ceSNicholas Bellinger } 1211e48354ceSNicholas Bellinger 1212e48354ceSNicholas Bellinger return 0; 1213e48354ceSNicholas Bellinger } 1214